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Comparing libev/ev.c (file contents):
Revision 1.388 by root, Fri Jul 29 12:17:26 2011 UTC vs.
Revision 1.536 by root, Wed Aug 10 16:50:05 2022 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2020 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#pragma clang diagnostic ignored "-Wunused-value"
41#pragma clang diagnostic ignored "-Wcomment"
42#pragma clang diagnostic ignored "-Wextern-initializer"
43
40/* this big block deduces configuration from config.h */ 44/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
43# include EV_CONFIG_H 47# include EV_CONFIG_H
44# else 48# else
45# include "config.h" 49# include "config.h"
46# endif 50# endif
47 51
48#if HAVE_FLOOR 52# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR 53# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1 54# define EV_USE_FLOOR 1
55# endif
51# endif 56# endif
52#endif
53 57
54# if HAVE_CLOCK_SYSCALL 58# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL 59# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1 60# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME 61# ifndef EV_USE_REALTIME
… …
59# endif 63# endif
60# ifndef EV_USE_MONOTONIC 64# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1 65# define EV_USE_MONOTONIC 1
62# endif 66# endif
63# endif 67# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL) 68# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0 69# define EV_USE_CLOCK_SYSCALL 0
66# endif 70# endif
67 71
68# if HAVE_CLOCK_GETTIME 72# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC 73# ifndef EV_USE_MONOTONIC
… …
115# else 119# else
116# undef EV_USE_EPOLL 120# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0 121# define EV_USE_EPOLL 0
118# endif 122# endif
119 123
124# if HAVE_LINUX_AIO_ABI_H
125# ifndef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */
127# endif
128# else
129# undef EV_USE_LINUXAIO
130# define EV_USE_LINUXAIO 0
131# endif
132
133# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
134# ifndef EV_USE_IOURING
135# define EV_USE_IOURING EV_FEATURE_BACKENDS
136# endif
137# else
138# undef EV_USE_IOURING
139# define EV_USE_IOURING 0
140# endif
141
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 142# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE 143# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 144# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif 145# endif
124# else 146# else
… …
159# endif 181# endif
160# else 182# else
161# undef EV_USE_EVENTFD 183# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0 184# define EV_USE_EVENTFD 0
163# endif 185# endif
164 186
187# if HAVE_SYS_TIMERFD_H
188# ifndef EV_USE_TIMERFD
189# define EV_USE_TIMERFD EV_FEATURE_OS
190# endif
191# else
192# undef EV_USE_TIMERFD
193# define EV_USE_TIMERFD 0
165#endif 194# endif
195
196#endif
197
198/* OS X, in its infinite idiocy, actually HARDCODES
199 * a limit of 1024 into their select. Where people have brains,
200 * OS X engineers apparently have a vacuum. Or maybe they were
201 * ordered to have a vacuum, or they do anything for money.
202 * This might help. Or not.
203 * Note that this must be defined early, as other include files
204 * will rely on this define as well.
205 */
206#define _DARWIN_UNLIMITED_SELECT 1
166 207
167#include <stdlib.h> 208#include <stdlib.h>
168#include <string.h> 209#include <string.h>
169#include <fcntl.h> 210#include <fcntl.h>
170#include <stddef.h> 211#include <stddef.h>
… …
183# include EV_H 224# include EV_H
184#else 225#else
185# include "ev.h" 226# include "ev.h"
186#endif 227#endif
187 228
188EV_CPP(extern "C" {) 229#if EV_NO_THREADS
230# undef EV_NO_SMP
231# define EV_NO_SMP 1
232# undef ECB_NO_THREADS
233# define ECB_NO_THREADS 1
234#endif
235#if EV_NO_SMP
236# undef EV_NO_SMP
237# define ECB_NO_SMP 1
238#endif
189 239
190#ifndef _WIN32 240#ifndef _WIN32
191# include <sys/time.h> 241# include <sys/time.h>
192# include <sys/wait.h> 242# include <sys/wait.h>
193# include <unistd.h> 243# include <unistd.h>
194#else 244#else
195# include <io.h> 245# include <io.h>
196# define WIN32_LEAN_AND_MEAN 246# define WIN32_LEAN_AND_MEAN
247# include <winsock2.h>
197# include <windows.h> 248# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET 249# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1 250# define EV_SELECT_IS_WINSOCKET 1
200# endif 251# endif
201# undef EV_AVOID_STDIO 252# undef EV_AVOID_STDIO
202#endif 253#endif
203 254
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */ 255/* this block tries to deduce configuration from header-defined symbols and defaults */
213 256
214/* try to deduce the maximum number of signals on this platform */ 257/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG) 258#if defined EV_NSIG
216/* use what's provided */ 259/* use what's provided */
217#elif defined (NSIG) 260#elif defined NSIG
218# define EV_NSIG (NSIG) 261# define EV_NSIG (NSIG)
219#elif defined(_NSIG) 262#elif defined _NSIG
220# define EV_NSIG (_NSIG) 263# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX) 264#elif defined SIGMAX
222# define EV_NSIG (SIGMAX+1) 265# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX) 266#elif defined SIG_MAX
224# define EV_NSIG (SIG_MAX+1) 267# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX) 268#elif defined _SIG_MAX
226# define EV_NSIG (_SIG_MAX+1) 269# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG) 270#elif defined MAXSIG
228# define EV_NSIG (MAXSIG+1) 271# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG) 272#elif defined MAX_SIG
230# define EV_NSIG (MAX_SIG+1) 273# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE) 274#elif defined SIGARRAYSIZE
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 275# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig) 276#elif defined _sys_nsig
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 277# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else 278#else
236# error "unable to find value for NSIG, please report" 279# define EV_NSIG (8 * sizeof (sigset_t) + 1)
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif 280#endif
241 281
242#ifndef EV_USE_FLOOR 282#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0 283# define EV_USE_FLOOR 0
244#endif 284#endif
245 285
246#ifndef EV_USE_CLOCK_SYSCALL 286#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2 287# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 288# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else 289# else
250# define EV_USE_CLOCK_SYSCALL 0 290# define EV_USE_CLOCK_SYSCALL 0
251# endif 291# endif
252#endif 292#endif
253 293
294#if !(_POSIX_TIMERS > 0)
295# ifndef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 0
297# endif
298# ifndef EV_USE_REALTIME
299# define EV_USE_REALTIME 0
300# endif
301#endif
302
254#ifndef EV_USE_MONOTONIC 303#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 304# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS 305# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else 306# else
258# define EV_USE_MONOTONIC 0 307# define EV_USE_MONOTONIC 0
259# endif 308# endif
260#endif 309#endif
… …
297 346
298#ifndef EV_USE_PORT 347#ifndef EV_USE_PORT
299# define EV_USE_PORT 0 348# define EV_USE_PORT 0
300#endif 349#endif
301 350
351#ifndef EV_USE_LINUXAIO
352# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
353# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */
354# else
355# define EV_USE_LINUXAIO 0
356# endif
357#endif
358
359#ifndef EV_USE_IOURING
360# if __linux /* later checks might disable again */
361# define EV_USE_IOURING 1
362# else
363# define EV_USE_IOURING 0
364# endif
365#endif
366
302#ifndef EV_USE_INOTIFY 367#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 368# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS 369# define EV_USE_INOTIFY EV_FEATURE_OS
305# else 370# else
306# define EV_USE_INOTIFY 0 371# define EV_USE_INOTIFY 0
… …
329# else 394# else
330# define EV_USE_SIGNALFD 0 395# define EV_USE_SIGNALFD 0
331# endif 396# endif
332#endif 397#endif
333 398
399#ifndef EV_USE_TIMERFD
400# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8))
401# define EV_USE_TIMERFD EV_FEATURE_OS
402# else
403# define EV_USE_TIMERFD 0
404# endif
405#endif
406
334#if 0 /* debugging */ 407#if 0 /* debugging */
335# define EV_VERIFY 3 408# define EV_VERIFY 3
336# define EV_USE_4HEAP 1 409# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1 410# define EV_HEAP_CACHE_AT 1
338#endif 411#endif
… …
347 420
348#ifndef EV_HEAP_CACHE_AT 421#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 422# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif 423#endif
351 424
425#ifdef __ANDROID__
426/* supposedly, android doesn't typedef fd_mask */
427# undef EV_USE_SELECT
428# define EV_USE_SELECT 0
429/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
430# undef EV_USE_CLOCK_SYSCALL
431# define EV_USE_CLOCK_SYSCALL 0
432#endif
433
434/* aix's poll.h seems to cause lots of trouble */
435#ifdef _AIX
436/* AIX has a completely broken poll.h header */
437# undef EV_USE_POLL
438# define EV_USE_POLL 0
439#endif
440
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 441/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */ 442/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL 443#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h> 444# include <sys/syscall.h>
356# ifdef SYS_clock_gettime 445# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 446# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC 447# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1 448# define EV_USE_MONOTONIC 1
449# define EV_NEED_SYSCALL 1
360# else 450# else
361# undef EV_USE_CLOCK_SYSCALL 451# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0 452# define EV_USE_CLOCK_SYSCALL 0
363# endif 453# endif
364#endif 454#endif
365 455
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 456/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367 457
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
373
374#ifndef CLOCK_MONOTONIC 458#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC 459# undef EV_USE_MONOTONIC
376# define EV_USE_MONOTONIC 0 460# define EV_USE_MONOTONIC 0
377#endif 461#endif
378 462
… …
384#if !EV_STAT_ENABLE 468#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY 469# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0 470# define EV_USE_INOTIFY 0
387#endif 471#endif
388 472
473#if __linux && EV_USE_IOURING
474# include <linux/version.h>
475# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
476# undef EV_USE_IOURING
477# define EV_USE_IOURING 0
478# endif
479#endif
480
389#if !EV_USE_NANOSLEEP 481#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */ 482/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux) 483# if !defined _WIN32 && !defined __hpux
392# include <sys/select.h> 484# include <sys/select.h>
485# endif
486#endif
487
488#if EV_USE_LINUXAIO
489# include <sys/syscall.h>
490# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
491# define EV_NEED_SYSCALL 1
492# else
493# undef EV_USE_LINUXAIO
494# define EV_USE_LINUXAIO 0
495# endif
496#endif
497
498#if EV_USE_IOURING
499# include <sys/syscall.h>
500# if !SYS_io_uring_register && __linux && !__alpha
501# define SYS_io_uring_setup 425
502# define SYS_io_uring_enter 426
503# define SYS_io_uring_register 427
504# endif
505# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
506# define EV_NEED_SYSCALL 1
507# else
508# undef EV_USE_IOURING
509# define EV_USE_IOURING 0
393# endif 510# endif
394#endif 511#endif
395 512
396#if EV_USE_INOTIFY 513#if EV_USE_INOTIFY
397# include <sys/statfs.h> 514# include <sys/statfs.h>
… …
401# undef EV_USE_INOTIFY 518# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0 519# define EV_USE_INOTIFY 0
403# endif 520# endif
404#endif 521#endif
405 522
406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif
409
410#if EV_USE_EVENTFD 523#if EV_USE_EVENTFD
411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 524/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
412# include <stdint.h> 525# include <stdint.h>
413# ifndef EFD_NONBLOCK 526# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK 527# define EFD_NONBLOCK O_NONBLOCK
415# endif 528# endif
416# ifndef EFD_CLOEXEC 529# ifndef EFD_CLOEXEC
… …
422# endif 535# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); 536EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif 537#endif
425 538
426#if EV_USE_SIGNALFD 539#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 540/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
428# include <stdint.h> 541# include <stdint.h>
429# ifndef SFD_NONBLOCK 542# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK 543# define SFD_NONBLOCK O_NONBLOCK
431# endif 544# endif
432# ifndef SFD_CLOEXEC 545# ifndef SFD_CLOEXEC
… …
434# define SFD_CLOEXEC O_CLOEXEC 547# define SFD_CLOEXEC O_CLOEXEC
435# else 548# else
436# define SFD_CLOEXEC 02000000 549# define SFD_CLOEXEC 02000000
437# endif 550# endif
438# endif 551# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags); 552EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
440 553
441struct signalfd_siginfo 554struct signalfd_siginfo
442{ 555{
443 uint32_t ssi_signo; 556 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)]; 557 char pad[128 - sizeof (uint32_t)];
445}; 558};
446#endif 559#endif
447 560
448/**/ 561/* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */
562#if EV_USE_TIMERFD
563# include <sys/timerfd.h>
564/* timerfd is only used for periodics */
565# if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE
566# undef EV_USE_TIMERFD
567# define EV_USE_TIMERFD 0
568# endif
569#endif
570
571/*****************************************************************************/
449 572
450#if EV_VERIFY >= 3 573#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A) 574# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else 575#else
453# define EV_FREQUENT_CHECK do { } while (0) 576# define EV_FREQUENT_CHECK do { } while (0)
… …
458 * This value is good at least till the year 4000. 581 * This value is good at least till the year 4000.
459 */ 582 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ 583#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ 584/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
462 585
463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 586#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 587#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
588#define MAX_BLOCKTIME2 1500001.07 /* same, but when timerfd is used to detect jumps, also safe delay to not overflow */
465 589
590/* find a portable timestamp that is "always" in the future but fits into time_t.
591 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
592 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
593#define EV_TSTAMP_HUGE \
594 (sizeof (time_t) >= 8 ? 10000000000000. \
595 : 0 < (time_t)4294967295 ? 4294967295. \
596 : 2147483647.) \
597
598#ifndef EV_TS_CONST
599# define EV_TS_CONST(nv) nv
600# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
601# define EV_TS_FROM_USEC(us) us * 1e-6
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 602# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 603# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
604# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
605# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
606#endif
468 607
469/* the following are taken from libecb */ 608/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ecb.h start */ 609/* ECB.H BEGIN */
610/*
611 * libecb - http://software.schmorp.de/pkg/libecb
612 *
613 * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de>
614 * Copyright (©) 2011 Emanuele Giaquinta
615 * All rights reserved.
616 *
617 * Redistribution and use in source and binary forms, with or without modifica-
618 * tion, are permitted provided that the following conditions are met:
619 *
620 * 1. Redistributions of source code must retain the above copyright notice,
621 * this list of conditions and the following disclaimer.
622 *
623 * 2. Redistributions in binary form must reproduce the above copyright
624 * notice, this list of conditions and the following disclaimer in the
625 * documentation and/or other materials provided with the distribution.
626 *
627 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
628 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
629 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
630 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
631 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
632 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
633 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
634 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
635 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
636 * OF THE POSSIBILITY OF SUCH DAMAGE.
637 *
638 * Alternatively, the contents of this file may be used under the terms of
639 * the GNU General Public License ("GPL") version 2 or any later version,
640 * in which case the provisions of the GPL are applicable instead of
641 * the above. If you wish to allow the use of your version of this file
642 * only under the terms of the GPL and not to allow others to use your
643 * version of this file under the BSD license, indicate your decision
644 * by deleting the provisions above and replace them with the notice
645 * and other provisions required by the GPL. If you do not delete the
646 * provisions above, a recipient may use your version of this file under
647 * either the BSD or the GPL.
648 */
649
650#ifndef ECB_H
651#define ECB_H
652
653/* 16 bits major, 16 bits minor */
654#define ECB_VERSION 0x00010008
655
656#include <string.h> /* for memcpy */
657
658#if defined (_WIN32) && !defined (__MINGW32__)
659 typedef signed char int8_t;
660 typedef unsigned char uint8_t;
661 typedef signed char int_fast8_t;
662 typedef unsigned char uint_fast8_t;
663 typedef signed short int16_t;
664 typedef unsigned short uint16_t;
665 typedef signed int int_fast16_t;
666 typedef unsigned int uint_fast16_t;
667 typedef signed int int32_t;
668 typedef unsigned int uint32_t;
669 typedef signed int int_fast32_t;
670 typedef unsigned int uint_fast32_t;
671 #if __GNUC__
672 typedef signed long long int64_t;
673 typedef unsigned long long uint64_t;
674 #else /* _MSC_VER || __BORLANDC__ */
675 typedef signed __int64 int64_t;
676 typedef unsigned __int64 uint64_t;
677 #endif
678 typedef int64_t int_fast64_t;
679 typedef uint64_t uint_fast64_t;
680 #ifdef _WIN64
681 #define ECB_PTRSIZE 8
682 typedef uint64_t uintptr_t;
683 typedef int64_t intptr_t;
684 #else
685 #define ECB_PTRSIZE 4
686 typedef uint32_t uintptr_t;
687 typedef int32_t intptr_t;
688 #endif
689#else
690 #include <inttypes.h>
691 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
692 #define ECB_PTRSIZE 8
693 #else
694 #define ECB_PTRSIZE 4
695 #endif
696#endif
697
698#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
699#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
700
701#ifndef ECB_OPTIMIZE_SIZE
702 #if __OPTIMIZE_SIZE__
703 #define ECB_OPTIMIZE_SIZE 1
704 #else
705 #define ECB_OPTIMIZE_SIZE 0
706 #endif
707#endif
708
709/* work around x32 idiocy by defining proper macros */
710#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
711 #if _ILP32
712 #define ECB_AMD64_X32 1
713 #else
714 #define ECB_AMD64 1
715 #endif
716#endif
471 717
472/* many compilers define _GNUC_ to some versions but then only implement 718/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions, 719 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers. 720 * causing enormous grief in return for some better fake benchmark numbers.
475 * or so. 721 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have 722 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place. 723 * an issue with that they should have done it right in the first place.
478 */ 724 */
479#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) 725#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
481 #define ECB_GCC_VERSION(major,minor) 0 726 #define ECB_GCC_VERSION(major,minor) 0
482 #else 727#else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 728 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
729#endif
730
731#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
732
733#if __clang__ && defined __has_builtin
734 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
735#else
736 #define ECB_CLANG_BUILTIN(x) 0
737#endif
738
739#if __clang__ && defined __has_extension
740 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
741#else
742 #define ECB_CLANG_EXTENSION(x) 0
743#endif
744
745#define ECB_CPP (__cplusplus+0)
746#define ECB_CPP11 (__cplusplus >= 201103L)
747#define ECB_CPP14 (__cplusplus >= 201402L)
748#define ECB_CPP17 (__cplusplus >= 201703L)
749
750#if ECB_CPP
751 #define ECB_C 0
752 #define ECB_STDC_VERSION 0
753#else
754 #define ECB_C 1
755 #define ECB_STDC_VERSION __STDC_VERSION__
756#endif
757
758#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
759#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
760#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
761
762#if ECB_CPP
763 #define ECB_EXTERN_C extern "C"
764 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
765 #define ECB_EXTERN_C_END }
766#else
767 #define ECB_EXTERN_C extern
768 #define ECB_EXTERN_C_BEG
769 #define ECB_EXTERN_C_END
770#endif
771
772/*****************************************************************************/
773
774/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
775/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
776
777#if ECB_NO_THREADS
778 #define ECB_NO_SMP 1
779#endif
780
781#if ECB_NO_SMP
782 #define ECB_MEMORY_FENCE do { } while (0)
783#endif
784
785/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
786#if __xlC__ && ECB_CPP
787 #include <builtins.h>
788#endif
789
790#if 1400 <= _MSC_VER
791 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
792#endif
793
794#ifndef ECB_MEMORY_FENCE
795 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
796 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
797 #if __i386 || __i386__
798 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
799 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
800 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
801 #elif ECB_GCC_AMD64
802 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
803 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
804 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
805 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
806 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
807 #elif defined __ARM_ARCH_2__ \
808 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
809 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
810 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
811 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
812 || defined __ARM_ARCH_5TEJ__
813 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
814 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
815 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
816 || defined __ARM_ARCH_6T2__
817 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
818 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
819 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
820 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
821 #elif __aarch64__
822 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
823 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
824 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
825 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
826 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
827 #elif defined __s390__ || defined __s390x__
828 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
829 #elif defined __mips__
830 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
831 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
832 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
833 #elif defined __alpha__
834 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
835 #elif defined __hppa__
836 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
837 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
838 #elif defined __ia64__
839 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
840 #elif defined __m68k__
841 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
842 #elif defined __m88k__
843 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
844 #elif defined __sh__
845 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
846 #endif
484 #endif 847 #endif
485#endif 848#endif
486 849
487#if __cplusplus 850#ifndef ECB_MEMORY_FENCE
851 #if ECB_GCC_VERSION(4,7)
852 /* see comment below (stdatomic.h) about the C11 memory model. */
853 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
854 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
855 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
856 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
857
858 #elif ECB_CLANG_EXTENSION(c_atomic)
859 /* see comment below (stdatomic.h) about the C11 memory model. */
860 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
861 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
862 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
863 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
864
865 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
866 #define ECB_MEMORY_FENCE __sync_synchronize ()
867 #elif _MSC_VER >= 1500 /* VC++ 2008 */
868 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
869 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
870 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
871 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
872 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
873 #elif _MSC_VER >= 1400 /* VC++ 2005 */
874 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
875 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
876 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
877 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
878 #elif defined _WIN32
879 #include <WinNT.h>
880 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
881 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
882 #include <mbarrier.h>
883 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
884 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
885 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
886 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
887 #elif __xlC__
888 #define ECB_MEMORY_FENCE __sync ()
889 #endif
890#endif
891
892#ifndef ECB_MEMORY_FENCE
893 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
894 /* we assume that these memory fences work on all variables/all memory accesses, */
895 /* not just C11 atomics and atomic accesses */
896 #include <stdatomic.h>
897 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
898 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
899 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
900 #endif
901#endif
902
903#ifndef ECB_MEMORY_FENCE
904 #if !ECB_AVOID_PTHREADS
905 /*
906 * if you get undefined symbol references to pthread_mutex_lock,
907 * or failure to find pthread.h, then you should implement
908 * the ECB_MEMORY_FENCE operations for your cpu/compiler
909 * OR provide pthread.h and link against the posix thread library
910 * of your system.
911 */
912 #include <pthread.h>
913 #define ECB_NEEDS_PTHREADS 1
914 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
915
916 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
917 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
918 #endif
919#endif
920
921#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
922 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
923#endif
924
925#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
926 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
927#endif
928
929#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
930 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
931#endif
932
933/*****************************************************************************/
934
935#if ECB_CPP
488 #define ecb_inline static inline 936 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5) 937#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__ 938 #define ecb_inline static __inline__
491#elif ECB_C99 939#elif ECB_C99
492 #define ecb_inline static inline 940 #define ecb_inline static inline
493#else 941#else
494 #define ecb_inline static 942 #define ecb_inline static
495#endif 943#endif
496 944
497#ifndef ECB_MEMORY_FENCE
498 #if ECB_GCC_VERSION(2,5)
499 #if __x86
500 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
501 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
502 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
503 #elif __amd64
504 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
505 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
506 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
507 #endif
508 #endif
509#endif
510
511#ifndef ECB_MEMORY_FENCE
512 #if ECB_GCC_VERSION(4,4)
513 #define ECB_MEMORY_FENCE __sync_synchronize ()
514 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
515 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
516 #elif _MSC_VER >= 1400 && 0 /* TODO: only true when using volatiles */
517 #define ECB_MEMORY_FENCE do { } while (0)
518 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
519 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
520 #elif defined(_WIN32)
521 #include <WinNT.h>
522 #define ECB_MEMORY_FENCE MemoryBarrier ()
523 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
524 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
525 #endif
526#endif
527
528#ifndef ECB_MEMORY_FENCE
529 #include <pthread.h>
530
531 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
532 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
533 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
534 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
535#endif
536
537#if ECB_GCC_VERSION(3,1) 945#if ECB_GCC_VERSION(3,3)
946 #define ecb_restrict __restrict__
947#elif ECB_C99
948 #define ecb_restrict restrict
949#else
950 #define ecb_restrict
951#endif
952
953typedef int ecb_bool;
954
955#define ECB_CONCAT_(a, b) a ## b
956#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
957#define ECB_STRINGIFY_(a) # a
958#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
959#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
960
961#define ecb_function_ ecb_inline
962
963#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
538 #define ecb_attribute(attrlist) __attribute__(attrlist) 964 #define ecb_attribute(attrlist) __attribute__ (attrlist)
965#else
966 #define ecb_attribute(attrlist)
967#endif
968
969#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
539 #define ecb_is_constant(expr) __builtin_constant_p (expr) 970 #define ecb_is_constant(expr) __builtin_constant_p (expr)
971#else
972 /* possible C11 impl for integral types
973 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
974 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
975
976 #define ecb_is_constant(expr) 0
977#endif
978
979#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
540 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 980 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
981#else
982 #define ecb_expect(expr,value) (expr)
983#endif
984
985#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
541 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 986 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
542#else 987#else
543 #define ecb_attribute(attrlist)
544 #define ecb_is_constant(expr) 0
545 #define ecb_expect(expr,value) (expr)
546 #define ecb_prefetch(addr,rw,locality) 988 #define ecb_prefetch(addr,rw,locality)
547#endif 989#endif
548 990
991/* no emulation for ecb_decltype */
992#if ECB_CPP11
993 // older implementations might have problems with decltype(x)::type, work around it
994 template<class T> struct ecb_decltype_t { typedef T type; };
995 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
996#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
997 #define ecb_decltype(x) __typeof__ (x)
998#endif
999
1000#if _MSC_VER >= 1300
1001 #define ecb_deprecated __declspec (deprecated)
1002#else
1003 #define ecb_deprecated ecb_attribute ((__deprecated__))
1004#endif
1005
1006#if _MSC_VER >= 1500
1007 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
1008#elif ECB_GCC_VERSION(4,5)
1009 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
1010#else
1011 #define ecb_deprecated_message(msg) ecb_deprecated
1012#endif
1013
1014#if _MSC_VER >= 1400
1015 #define ecb_noinline __declspec (noinline)
1016#else
549#define ecb_noinline ecb_attribute ((__noinline__)) 1017 #define ecb_noinline ecb_attribute ((__noinline__))
550#define ecb_noreturn ecb_attribute ((__noreturn__)) 1018#endif
1019
551#define ecb_unused ecb_attribute ((__unused__)) 1020#define ecb_unused ecb_attribute ((__unused__))
552#define ecb_const ecb_attribute ((__const__)) 1021#define ecb_const ecb_attribute ((__const__))
553#define ecb_pure ecb_attribute ((__pure__)) 1022#define ecb_pure ecb_attribute ((__pure__))
1023
1024#if ECB_C11 || __IBMC_NORETURN
1025 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
1026 #define ecb_noreturn _Noreturn
1027#elif ECB_CPP11
1028 #define ecb_noreturn [[noreturn]]
1029#elif _MSC_VER >= 1200
1030 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
1031 #define ecb_noreturn __declspec (noreturn)
1032#else
1033 #define ecb_noreturn ecb_attribute ((__noreturn__))
1034#endif
554 1035
555#if ECB_GCC_VERSION(4,3) 1036#if ECB_GCC_VERSION(4,3)
556 #define ecb_artificial ecb_attribute ((__artificial__)) 1037 #define ecb_artificial ecb_attribute ((__artificial__))
557 #define ecb_hot ecb_attribute ((__hot__)) 1038 #define ecb_hot ecb_attribute ((__hot__))
558 #define ecb_cold ecb_attribute ((__cold__)) 1039 #define ecb_cold ecb_attribute ((__cold__))
… …
565/* put around conditional expressions if you are very sure that the */ 1046/* put around conditional expressions if you are very sure that the */
566/* expression is mostly true or mostly false. note that these return */ 1047/* expression is mostly true or mostly false. note that these return */
567/* booleans, not the expression. */ 1048/* booleans, not the expression. */
568#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) 1049#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
569#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) 1050#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
570/* ecb.h end */ 1051/* for compatibility to the rest of the world */
1052#define ecb_likely(expr) ecb_expect_true (expr)
1053#define ecb_unlikely(expr) ecb_expect_false (expr)
571 1054
572#define expect_false(cond) ecb_expect_false (cond) 1055/* count trailing zero bits and count # of one bits */
573#define expect_true(cond) ecb_expect_true (cond) 1056#if ECB_GCC_VERSION(3,4) \
574#define noinline ecb_noinline 1057 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1058 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1059 && ECB_CLANG_BUILTIN(__builtin_popcount))
1060 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1061 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1062 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1063 #define ecb_ctz32(x) __builtin_ctz (x)
1064 #define ecb_ctz64(x) __builtin_ctzll (x)
1065 #define ecb_popcount32(x) __builtin_popcount (x)
1066 /* no popcountll */
1067#else
1068 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1069 ecb_function_ ecb_const int
1070 ecb_ctz32 (uint32_t x)
1071 {
1072#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1073 unsigned long r;
1074 _BitScanForward (&r, x);
1075 return (int)r;
1076#else
1077 int r = 0;
1078
1079 x &= ~x + 1; /* this isolates the lowest bit */
1080
1081#if ECB_branchless_on_i386
1082 r += !!(x & 0xaaaaaaaa) << 0;
1083 r += !!(x & 0xcccccccc) << 1;
1084 r += !!(x & 0xf0f0f0f0) << 2;
1085 r += !!(x & 0xff00ff00) << 3;
1086 r += !!(x & 0xffff0000) << 4;
1087#else
1088 if (x & 0xaaaaaaaa) r += 1;
1089 if (x & 0xcccccccc) r += 2;
1090 if (x & 0xf0f0f0f0) r += 4;
1091 if (x & 0xff00ff00) r += 8;
1092 if (x & 0xffff0000) r += 16;
1093#endif
1094
1095 return r;
1096#endif
1097 }
1098
1099 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1100 ecb_function_ ecb_const int
1101 ecb_ctz64 (uint64_t x)
1102 {
1103#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1104 unsigned long r;
1105 _BitScanForward64 (&r, x);
1106 return (int)r;
1107#else
1108 int shift = x & 0xffffffff ? 0 : 32;
1109 return ecb_ctz32 (x >> shift) + shift;
1110#endif
1111 }
1112
1113 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1114 ecb_function_ ecb_const int
1115 ecb_popcount32 (uint32_t x)
1116 {
1117 x -= (x >> 1) & 0x55555555;
1118 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1119 x = ((x >> 4) + x) & 0x0f0f0f0f;
1120 x *= 0x01010101;
1121
1122 return x >> 24;
1123 }
1124
1125 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1126 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1127 {
1128#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1129 unsigned long r;
1130 _BitScanReverse (&r, x);
1131 return (int)r;
1132#else
1133 int r = 0;
1134
1135 if (x >> 16) { x >>= 16; r += 16; }
1136 if (x >> 8) { x >>= 8; r += 8; }
1137 if (x >> 4) { x >>= 4; r += 4; }
1138 if (x >> 2) { x >>= 2; r += 2; }
1139 if (x >> 1) { r += 1; }
1140
1141 return r;
1142#endif
1143 }
1144
1145 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1146 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1147 {
1148#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1149 unsigned long r;
1150 _BitScanReverse64 (&r, x);
1151 return (int)r;
1152#else
1153 int r = 0;
1154
1155 if (x >> 32) { x >>= 32; r += 32; }
1156
1157 return r + ecb_ld32 (x);
1158#endif
1159 }
1160#endif
1161
1162ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1163ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1164ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1165ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1166
1167ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1168ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1169{
1170 return ( (x * 0x0802U & 0x22110U)
1171 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1172}
1173
1174ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1175ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1176{
1177 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1178 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1179 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1180 x = ( x >> 8 ) | ( x << 8);
1181
1182 return x;
1183}
1184
1185ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1186ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1187{
1188 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1189 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1190 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1191 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1192 x = ( x >> 16 ) | ( x << 16);
1193
1194 return x;
1195}
1196
1197/* popcount64 is only available on 64 bit cpus as gcc builtin */
1198/* so for this version we are lazy */
1199ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1200ecb_function_ ecb_const int
1201ecb_popcount64 (uint64_t x)
1202{
1203 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1204}
1205
1206ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1207ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1208ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1209ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1210ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1211ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1212ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1213ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1214
1215ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1216ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1217ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1218ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1219ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1220ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1221ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1222ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1223
1224#if ECB_CPP
1225
1226inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
1227inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
1228inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
1229inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
1230
1231inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
1232inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
1233inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
1234inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
1235
1236inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
1237inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
1238inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
1239inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
1240
1241inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
1242inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
1243inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
1244inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
1245
1246inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
1247inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
1248inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
1249
1250inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
1251inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
1252inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
1253inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
1254
1255inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
1256inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
1257inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
1258inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
1259
1260#endif
1261
1262#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1263 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1264 #define ecb_bswap16(x) __builtin_bswap16 (x)
1265 #else
1266 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1267 #endif
1268 #define ecb_bswap32(x) __builtin_bswap32 (x)
1269 #define ecb_bswap64(x) __builtin_bswap64 (x)
1270#elif _MSC_VER
1271 #include <stdlib.h>
1272 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1273 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1274 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1275#else
1276 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1277 ecb_function_ ecb_const uint16_t
1278 ecb_bswap16 (uint16_t x)
1279 {
1280 return ecb_rotl16 (x, 8);
1281 }
1282
1283 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1284 ecb_function_ ecb_const uint32_t
1285 ecb_bswap32 (uint32_t x)
1286 {
1287 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1288 }
1289
1290 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1291 ecb_function_ ecb_const uint64_t
1292 ecb_bswap64 (uint64_t x)
1293 {
1294 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1295 }
1296#endif
1297
1298#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1299 #define ecb_unreachable() __builtin_unreachable ()
1300#else
1301 /* this seems to work fine, but gcc always emits a warning for it :/ */
1302 ecb_inline ecb_noreturn void ecb_unreachable (void);
1303 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1304#endif
1305
1306/* try to tell the compiler that some condition is definitely true */
1307#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1308
1309ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1310ecb_inline ecb_const uint32_t
1311ecb_byteorder_helper (void)
1312{
1313 /* the union code still generates code under pressure in gcc, */
1314 /* but less than using pointers, and always seems to */
1315 /* successfully return a constant. */
1316 /* the reason why we have this horrible preprocessor mess */
1317 /* is to avoid it in all cases, at least on common architectures */
1318 /* or when using a recent enough gcc version (>= 4.6) */
1319#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1320 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1321 #define ECB_LITTLE_ENDIAN 1
1322 return 0x44332211;
1323#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1324 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1325 #define ECB_BIG_ENDIAN 1
1326 return 0x11223344;
1327#else
1328 union
1329 {
1330 uint8_t c[4];
1331 uint32_t u;
1332 } u = { 0x11, 0x22, 0x33, 0x44 };
1333 return u.u;
1334#endif
1335}
1336
1337ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1338ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1339ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1340ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1341
1342/*****************************************************************************/
1343/* unaligned load/store */
1344
1345ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1346ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1347ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1348
1349ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1350ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1351ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1352
1353ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1354ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1355ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1356
1357ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
1358ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
1359ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
1360
1361ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
1362ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
1363ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
1364
1365ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1366ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1367ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1368
1369ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1370ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1371ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1372
1373ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
1374ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
1375ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
1376
1377ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
1378ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
1379ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
1380
1381ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
1382ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
1383ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
1384
1385#if ECB_CPP
1386
1387inline uint8_t ecb_bswap (uint8_t v) { return v; }
1388inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
1389inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
1390inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
1391
1392template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1393template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1394template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
1395template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
1396template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
1397template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
1398template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
1399template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
1400
1401template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1402template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1403template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
1404template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
1405template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
1406template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
1407template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
1408template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
1409
1410#endif
1411
1412/*****************************************************************************/
1413
1414#if ECB_GCC_VERSION(3,0) || ECB_C99
1415 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1416#else
1417 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1418#endif
1419
1420#if ECB_CPP
1421 template<typename T>
1422 static inline T ecb_div_rd (T val, T div)
1423 {
1424 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1425 }
1426 template<typename T>
1427 static inline T ecb_div_ru (T val, T div)
1428 {
1429 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1430 }
1431#else
1432 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1433 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1434#endif
1435
1436#if ecb_cplusplus_does_not_suck
1437 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1438 template<typename T, int N>
1439 static inline int ecb_array_length (const T (&arr)[N])
1440 {
1441 return N;
1442 }
1443#else
1444 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1445#endif
1446
1447/*****************************************************************************/
1448
1449ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1450ecb_function_ ecb_const uint32_t
1451ecb_binary16_to_binary32 (uint32_t x)
1452{
1453 unsigned int s = (x & 0x8000) << (31 - 15);
1454 int e = (x >> 10) & 0x001f;
1455 unsigned int m = x & 0x03ff;
1456
1457 if (ecb_expect_false (e == 31))
1458 /* infinity or NaN */
1459 e = 255 - (127 - 15);
1460 else if (ecb_expect_false (!e))
1461 {
1462 if (ecb_expect_true (!m))
1463 /* zero, handled by code below by forcing e to 0 */
1464 e = 0 - (127 - 15);
1465 else
1466 {
1467 /* subnormal, renormalise */
1468 unsigned int s = 10 - ecb_ld32 (m);
1469
1470 m = (m << s) & 0x3ff; /* mask implicit bit */
1471 e -= s - 1;
1472 }
1473 }
1474
1475 /* e and m now are normalised, or zero, (or inf or nan) */
1476 e += 127 - 15;
1477
1478 return s | (e << 23) | (m << (23 - 10));
1479}
1480
1481ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1482ecb_function_ ecb_const uint16_t
1483ecb_binary32_to_binary16 (uint32_t x)
1484{
1485 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1486 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1487 unsigned int m = x & 0x007fffff;
1488
1489 x &= 0x7fffffff;
1490
1491 /* if it's within range of binary16 normals, use fast path */
1492 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1493 {
1494 /* mantissa round-to-even */
1495 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1496
1497 /* handle overflow */
1498 if (ecb_expect_false (m >= 0x00800000))
1499 {
1500 m >>= 1;
1501 e += 1;
1502 }
1503
1504 return s | (e << 10) | (m >> (23 - 10));
1505 }
1506
1507 /* handle large numbers and infinity */
1508 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1509 return s | 0x7c00;
1510
1511 /* handle zero, subnormals and small numbers */
1512 if (ecb_expect_true (x < 0x38800000))
1513 {
1514 /* zero */
1515 if (ecb_expect_true (!x))
1516 return s;
1517
1518 /* handle subnormals */
1519
1520 /* too small, will be zero */
1521 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1522 return s;
1523
1524 m |= 0x00800000; /* make implicit bit explicit */
1525
1526 /* very tricky - we need to round to the nearest e (+10) bit value */
1527 {
1528 unsigned int bits = 14 - e;
1529 unsigned int half = (1 << (bits - 1)) - 1;
1530 unsigned int even = (m >> bits) & 1;
1531
1532 /* if this overflows, we will end up with a normalised number */
1533 m = (m + half + even) >> bits;
1534 }
1535
1536 return s | m;
1537 }
1538
1539 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1540 m >>= 13;
1541
1542 return s | 0x7c00 | m | !m;
1543}
1544
1545/*******************************************************************************/
1546/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1547
1548/* basically, everything uses "ieee pure-endian" floating point numbers */
1549/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1550#if 0 \
1551 || __i386 || __i386__ \
1552 || ECB_GCC_AMD64 \
1553 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1554 || defined __s390__ || defined __s390x__ \
1555 || defined __mips__ \
1556 || defined __alpha__ \
1557 || defined __hppa__ \
1558 || defined __ia64__ \
1559 || defined __m68k__ \
1560 || defined __m88k__ \
1561 || defined __sh__ \
1562 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1563 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1564 || defined __aarch64__
1565 #define ECB_STDFP 1
1566#else
1567 #define ECB_STDFP 0
1568#endif
1569
1570#ifndef ECB_NO_LIBM
1571
1572 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1573
1574 /* only the oldest of old doesn't have this one. solaris. */
1575 #ifdef INFINITY
1576 #define ECB_INFINITY INFINITY
1577 #else
1578 #define ECB_INFINITY HUGE_VAL
1579 #endif
1580
1581 #ifdef NAN
1582 #define ECB_NAN NAN
1583 #else
1584 #define ECB_NAN ECB_INFINITY
1585 #endif
1586
1587 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1588 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1589 #define ecb_frexpf(x,e) frexpf ((x), (e))
1590 #else
1591 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1592 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1593 #endif
1594
1595 /* convert a float to ieee single/binary32 */
1596 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1597 ecb_function_ ecb_const uint32_t
1598 ecb_float_to_binary32 (float x)
1599 {
1600 uint32_t r;
1601
1602 #if ECB_STDFP
1603 memcpy (&r, &x, 4);
1604 #else
1605 /* slow emulation, works for anything but -0 */
1606 uint32_t m;
1607 int e;
1608
1609 if (x == 0e0f ) return 0x00000000U;
1610 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1611 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1612 if (x != x ) return 0x7fbfffffU;
1613
1614 m = ecb_frexpf (x, &e) * 0x1000000U;
1615
1616 r = m & 0x80000000U;
1617
1618 if (r)
1619 m = -m;
1620
1621 if (e <= -126)
1622 {
1623 m &= 0xffffffU;
1624 m >>= (-125 - e);
1625 e = -126;
1626 }
1627
1628 r |= (e + 126) << 23;
1629 r |= m & 0x7fffffU;
1630 #endif
1631
1632 return r;
1633 }
1634
1635 /* converts an ieee single/binary32 to a float */
1636 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1637 ecb_function_ ecb_const float
1638 ecb_binary32_to_float (uint32_t x)
1639 {
1640 float r;
1641
1642 #if ECB_STDFP
1643 memcpy (&r, &x, 4);
1644 #else
1645 /* emulation, only works for normals and subnormals and +0 */
1646 int neg = x >> 31;
1647 int e = (x >> 23) & 0xffU;
1648
1649 x &= 0x7fffffU;
1650
1651 if (e)
1652 x |= 0x800000U;
1653 else
1654 e = 1;
1655
1656 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1657 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1658
1659 r = neg ? -r : r;
1660 #endif
1661
1662 return r;
1663 }
1664
1665 /* convert a double to ieee double/binary64 */
1666 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1667 ecb_function_ ecb_const uint64_t
1668 ecb_double_to_binary64 (double x)
1669 {
1670 uint64_t r;
1671
1672 #if ECB_STDFP
1673 memcpy (&r, &x, 8);
1674 #else
1675 /* slow emulation, works for anything but -0 */
1676 uint64_t m;
1677 int e;
1678
1679 if (x == 0e0 ) return 0x0000000000000000U;
1680 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1681 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1682 if (x != x ) return 0X7ff7ffffffffffffU;
1683
1684 m = frexp (x, &e) * 0x20000000000000U;
1685
1686 r = m & 0x8000000000000000;;
1687
1688 if (r)
1689 m = -m;
1690
1691 if (e <= -1022)
1692 {
1693 m &= 0x1fffffffffffffU;
1694 m >>= (-1021 - e);
1695 e = -1022;
1696 }
1697
1698 r |= ((uint64_t)(e + 1022)) << 52;
1699 r |= m & 0xfffffffffffffU;
1700 #endif
1701
1702 return r;
1703 }
1704
1705 /* converts an ieee double/binary64 to a double */
1706 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1707 ecb_function_ ecb_const double
1708 ecb_binary64_to_double (uint64_t x)
1709 {
1710 double r;
1711
1712 #if ECB_STDFP
1713 memcpy (&r, &x, 8);
1714 #else
1715 /* emulation, only works for normals and subnormals and +0 */
1716 int neg = x >> 63;
1717 int e = (x >> 52) & 0x7ffU;
1718
1719 x &= 0xfffffffffffffU;
1720
1721 if (e)
1722 x |= 0x10000000000000U;
1723 else
1724 e = 1;
1725
1726 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1727 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1728
1729 r = neg ? -r : r;
1730 #endif
1731
1732 return r;
1733 }
1734
1735 /* convert a float to ieee half/binary16 */
1736 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1737 ecb_function_ ecb_const uint16_t
1738 ecb_float_to_binary16 (float x)
1739 {
1740 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1741 }
1742
1743 /* convert an ieee half/binary16 to float */
1744 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1745 ecb_function_ ecb_const float
1746 ecb_binary16_to_float (uint16_t x)
1747 {
1748 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1749 }
1750
1751#endif
1752
1753#endif
1754
1755/* ECB.H END */
1756
1757#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1758/* if your architecture doesn't need memory fences, e.g. because it is
1759 * single-cpu/core, or if you use libev in a project that doesn't use libev
1760 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1761 * libev, in which cases the memory fences become nops.
1762 * alternatively, you can remove this #error and link against libpthread,
1763 * which will then provide the memory fences.
1764 */
1765# error "memory fences not defined for your architecture, please report"
1766#endif
1767
1768#ifndef ECB_MEMORY_FENCE
1769# define ECB_MEMORY_FENCE do { } while (0)
1770# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1771# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1772#endif
575 1773
576#define inline_size ecb_inline 1774#define inline_size ecb_inline
577 1775
578#if EV_FEATURE_CODE 1776#if EV_FEATURE_CODE
579# define inline_speed ecb_inline 1777# define inline_speed ecb_inline
580#else 1778#else
581# define inline_speed static noinline 1779# define inline_speed ecb_noinline static
582#endif 1780#endif
1781
1782/*****************************************************************************/
1783/* raw syscall wrappers */
1784
1785#if EV_NEED_SYSCALL
1786
1787#include <sys/syscall.h>
1788
1789/*
1790 * define some syscall wrappers for common architectures
1791 * this is mostly for nice looks during debugging, not performance.
1792 * our syscalls return < 0, not == -1, on error. which is good
1793 * enough for linux aio.
1794 * TODO: arm is also common nowadays, maybe even mips and x86
1795 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1796 */
1797#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1798 /* the costly errno access probably kills this for size optimisation */
1799
1800 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1801 ({ \
1802 long res; \
1803 register unsigned long r6 __asm__ ("r9" ); \
1804 register unsigned long r5 __asm__ ("r8" ); \
1805 register unsigned long r4 __asm__ ("r10"); \
1806 register unsigned long r3 __asm__ ("rdx"); \
1807 register unsigned long r2 __asm__ ("rsi"); \
1808 register unsigned long r1 __asm__ ("rdi"); \
1809 if (narg >= 6) r6 = (unsigned long)(arg6); \
1810 if (narg >= 5) r5 = (unsigned long)(arg5); \
1811 if (narg >= 4) r4 = (unsigned long)(arg4); \
1812 if (narg >= 3) r3 = (unsigned long)(arg3); \
1813 if (narg >= 2) r2 = (unsigned long)(arg2); \
1814 if (narg >= 1) r1 = (unsigned long)(arg1); \
1815 __asm__ __volatile__ ( \
1816 "syscall\n\t" \
1817 : "=a" (res) \
1818 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1819 : "cc", "r11", "cx", "memory"); \
1820 errno = -res; \
1821 res; \
1822 })
1823
1824#endif
1825
1826#ifdef ev_syscall
1827 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1828 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1829 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1830 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1831 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1832 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1833 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1834#else
1835 #define ev_syscall0(nr) syscall (nr)
1836 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1837 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1838 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1839 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1840 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1841 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1842#endif
1843
1844#endif
1845
1846/*****************************************************************************/
583 1847
584#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1848#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
585 1849
586#if EV_MINPRI == EV_MAXPRI 1850#if EV_MINPRI == EV_MAXPRI
587# define ABSPRI(w) (((W)w), 0) 1851# define ABSPRI(w) (((W)w), 0)
588#else 1852#else
589# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1853# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
590#endif 1854#endif
591 1855
592#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1856#define EMPTY /* required for microsofts broken pseudo-c compiler */
593#define EMPTY2(a,b) /* used to suppress some warnings */
594 1857
595typedef ev_watcher *W; 1858typedef ev_watcher *W;
596typedef ev_watcher_list *WL; 1859typedef ev_watcher_list *WL;
597typedef ev_watcher_time *WT; 1860typedef ev_watcher_time *WT;
598 1861
… …
623# include "ev_win32.c" 1886# include "ev_win32.c"
624#endif 1887#endif
625 1888
626/*****************************************************************************/ 1889/*****************************************************************************/
627 1890
1891#if EV_USE_LINUXAIO
1892# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1893#endif
1894
628/* define a suitable floor function (only used by periodics atm) */ 1895/* define a suitable floor function (only used by periodics atm) */
629 1896
630#if EV_USE_FLOOR 1897#if EV_USE_FLOOR
631# include <math.h> 1898# include <math.h>
632# define ev_floor(v) floor (v) 1899# define ev_floor(v) floor (v)
633#else 1900#else
634 1901
635#include <float.h> 1902#include <float.h>
636 1903
637/* a floor() replacement function, should be independent of ev_tstamp type */ 1904/* a floor() replacement function, should be independent of ev_tstamp type */
1905ecb_noinline
638static ev_tstamp noinline 1906static ev_tstamp
639ev_floor (ev_tstamp v) 1907ev_floor (ev_tstamp v)
640{ 1908{
641 /* the choice of shift factor is not terribly important */ 1909 /* the choice of shift factor is not terribly important */
642#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ 1910#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
643 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1911 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
644#else 1912#else
645 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; 1913 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
646#endif 1914#endif
647 1915
1916 /* special treatment for negative arguments */
1917 if (ecb_expect_false (v < 0.))
1918 {
1919 ev_tstamp f = -ev_floor (-v);
1920
1921 return f - (f == v ? 0 : 1);
1922 }
1923
648 /* argument too large for an unsigned long? */ 1924 /* argument too large for an unsigned long? then reduce it */
649 if (expect_false (v >= shift)) 1925 if (ecb_expect_false (v >= shift))
650 { 1926 {
651 ev_tstamp f; 1927 ev_tstamp f;
652 1928
653 if (v == v - 1.) 1929 if (v == v - 1.)
654 return v; /* very large number */ 1930 return v; /* very large numbers are assumed to be integer */
655 1931
656 f = shift * ev_floor (v * (1. / shift)); 1932 f = shift * ev_floor (v * (1. / shift));
657 return f + ev_floor (v - f); 1933 return f + ev_floor (v - f);
658 } 1934 }
659 1935
660 /* special treatment for negative args? */
661 if (expect_false (v < 0.))
662 {
663 ev_tstamp f = -ev_floor (-v);
664
665 return f - (f == v ? 0 : 1);
666 }
667
668 /* fits into an unsigned long */ 1936 /* fits into an unsigned long */
669 return (unsigned long)v; 1937 return (unsigned long)v;
670} 1938}
671 1939
672#endif 1940#endif
… …
675 1943
676#ifdef __linux 1944#ifdef __linux
677# include <sys/utsname.h> 1945# include <sys/utsname.h>
678#endif 1946#endif
679 1947
680static unsigned int noinline ecb_cold 1948ecb_noinline ecb_cold
1949static unsigned int
681ev_linux_version (void) 1950ev_linux_version (void)
682{ 1951{
683#ifdef __linux 1952#ifdef __linux
684 unsigned int v = 0; 1953 unsigned int v = 0;
685 struct utsname buf; 1954 struct utsname buf;
… …
714} 1983}
715 1984
716/*****************************************************************************/ 1985/*****************************************************************************/
717 1986
718#if EV_AVOID_STDIO 1987#if EV_AVOID_STDIO
719static void noinline ecb_cold 1988ecb_noinline ecb_cold
1989static void
720ev_printerr (const char *msg) 1990ev_printerr (const char *msg)
721{ 1991{
722 write (STDERR_FILENO, msg, strlen (msg)); 1992 write (STDERR_FILENO, msg, strlen (msg));
723} 1993}
724#endif 1994#endif
725 1995
726static void (*syserr_cb)(const char *msg); 1996static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
727 1997
728void ecb_cold 1998ecb_cold
1999void
729ev_set_syserr_cb (void (*cb)(const char *msg)) 2000ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
730{ 2001{
731 syserr_cb = cb; 2002 syserr_cb = cb;
732} 2003}
733 2004
734static void noinline ecb_cold 2005ecb_noinline ecb_cold
2006static void
735ev_syserr (const char *msg) 2007ev_syserr (const char *msg)
736{ 2008{
737 if (!msg) 2009 if (!msg)
738 msg = "(libev) system error"; 2010 msg = "(libev) system error";
739 2011
… …
752 abort (); 2024 abort ();
753 } 2025 }
754} 2026}
755 2027
756static void * 2028static void *
757ev_realloc_emul (void *ptr, long size) 2029ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
758{ 2030{
759#if __GLIBC__
760 return realloc (ptr, size);
761#else
762 /* some systems, notably openbsd and darwin, fail to properly 2031 /* some systems, notably openbsd and darwin, fail to properly
763 * implement realloc (x, 0) (as required by both ansi c-89 and 2032 * implement realloc (x, 0) (as required by both ansi c-89 and
764 * the single unix specification, so work around them here. 2033 * the single unix specification, so work around them here.
2034 * recently, also (at least) fedora and debian started breaking it,
2035 * despite documenting it otherwise.
765 */ 2036 */
766 2037
767 if (size) 2038 if (size)
768 return realloc (ptr, size); 2039 return realloc (ptr, size);
769 2040
770 free (ptr); 2041 free (ptr);
771 return 0; 2042 return 0;
772#endif
773} 2043}
774 2044
775static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 2045static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
776 2046
777void ecb_cold 2047ecb_cold
2048void
778ev_set_allocator (void *(*cb)(void *ptr, long size)) 2049ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
779{ 2050{
780 alloc = cb; 2051 alloc = cb;
781} 2052}
782 2053
783inline_speed void * 2054inline_speed void *
… …
810typedef struct 2081typedef struct
811{ 2082{
812 WL head; 2083 WL head;
813 unsigned char events; /* the events watched for */ 2084 unsigned char events; /* the events watched for */
814 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 2085 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
815 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 2086 unsigned char emask; /* some backends store the actual kernel mask in here */
816 unsigned char unused; 2087 unsigned char eflags; /* flags field for use by backends */
817#if EV_USE_EPOLL 2088#if EV_USE_EPOLL
818 unsigned int egen; /* generation counter to counter epoll bugs */ 2089 unsigned int egen; /* generation counter to counter epoll bugs */
819#endif 2090#endif
820#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2091#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
821 SOCKET handle; 2092 SOCKET handle;
… …
871 #undef VAR 2142 #undef VAR
872 }; 2143 };
873 #include "ev_wrap.h" 2144 #include "ev_wrap.h"
874 2145
875 static struct ev_loop default_loop_struct; 2146 static struct ev_loop default_loop_struct;
876 struct ev_loop *ev_default_loop_ptr; 2147 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
877 2148
878#else 2149#else
879 2150
880 ev_tstamp ev_rt_now; 2151 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
881 #define VAR(name,decl) static decl; 2152 #define VAR(name,decl) static decl;
882 #include "ev_vars.h" 2153 #include "ev_vars.h"
883 #undef VAR 2154 #undef VAR
884 2155
885 static int ev_default_loop_ptr; 2156 static int ev_default_loop_ptr;
886 2157
887#endif 2158#endif
888 2159
889#if EV_FEATURE_API 2160#if EV_FEATURE_API
890# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 2161# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
891# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 2162# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
892# define EV_INVOKE_PENDING invoke_cb (EV_A) 2163# define EV_INVOKE_PENDING invoke_cb (EV_A)
893#else 2164#else
894# define EV_RELEASE_CB (void)0 2165# define EV_RELEASE_CB (void)0
895# define EV_ACQUIRE_CB (void)0 2166# define EV_ACQUIRE_CB (void)0
896# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2167# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
… …
900 2171
901/*****************************************************************************/ 2172/*****************************************************************************/
902 2173
903#ifndef EV_HAVE_EV_TIME 2174#ifndef EV_HAVE_EV_TIME
904ev_tstamp 2175ev_tstamp
905ev_time (void) 2176ev_time (void) EV_NOEXCEPT
906{ 2177{
907#if EV_USE_REALTIME 2178#if EV_USE_REALTIME
908 if (expect_true (have_realtime)) 2179 if (ecb_expect_true (have_realtime))
909 { 2180 {
910 struct timespec ts; 2181 struct timespec ts;
911 clock_gettime (CLOCK_REALTIME, &ts); 2182 clock_gettime (CLOCK_REALTIME, &ts);
912 return ts.tv_sec + ts.tv_nsec * 1e-9; 2183 return EV_TS_GET (ts);
913 } 2184 }
914#endif 2185#endif
915 2186
2187 {
916 struct timeval tv; 2188 struct timeval tv;
917 gettimeofday (&tv, 0); 2189 gettimeofday (&tv, 0);
918 return tv.tv_sec + tv.tv_usec * 1e-6; 2190 return EV_TV_GET (tv);
2191 }
919} 2192}
920#endif 2193#endif
921 2194
922inline_size ev_tstamp 2195inline_size ev_tstamp
923get_clock (void) 2196get_clock (void)
924{ 2197{
925#if EV_USE_MONOTONIC 2198#if EV_USE_MONOTONIC
926 if (expect_true (have_monotonic)) 2199 if (ecb_expect_true (have_monotonic))
927 { 2200 {
928 struct timespec ts; 2201 struct timespec ts;
929 clock_gettime (CLOCK_MONOTONIC, &ts); 2202 clock_gettime (CLOCK_MONOTONIC, &ts);
930 return ts.tv_sec + ts.tv_nsec * 1e-9; 2203 return EV_TS_GET (ts);
931 } 2204 }
932#endif 2205#endif
933 2206
934 return ev_time (); 2207 return ev_time ();
935} 2208}
936 2209
937#if EV_MULTIPLICITY 2210#if EV_MULTIPLICITY
938ev_tstamp 2211ev_tstamp
939ev_now (EV_P) 2212ev_now (EV_P) EV_NOEXCEPT
940{ 2213{
941 return ev_rt_now; 2214 return ev_rt_now;
942} 2215}
943#endif 2216#endif
944 2217
945void 2218void
946ev_sleep (ev_tstamp delay) 2219ev_sleep (ev_tstamp delay) EV_NOEXCEPT
947{ 2220{
948 if (delay > 0.) 2221 if (delay > EV_TS_CONST (0.))
949 { 2222 {
950#if EV_USE_NANOSLEEP 2223#if EV_USE_NANOSLEEP
951 struct timespec ts; 2224 struct timespec ts;
952 2225
953 EV_TS_SET (ts, delay); 2226 EV_TS_SET (ts, delay);
954 nanosleep (&ts, 0); 2227 nanosleep (&ts, 0);
955#elif defined(_WIN32) 2228#elif defined _WIN32
2229 /* maybe this should round up, as ms is very low resolution */
2230 /* compared to select (µs) or nanosleep (ns) */
956 Sleep ((unsigned long)(delay * 1e3)); 2231 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
957#else 2232#else
958 struct timeval tv; 2233 struct timeval tv;
959 2234
960 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2235 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
961 /* something not guaranteed by newer posix versions, but guaranteed */ 2236 /* something not guaranteed by newer posix versions, but guaranteed */
… …
979 2254
980 do 2255 do
981 ncur <<= 1; 2256 ncur <<= 1;
982 while (cnt > ncur); 2257 while (cnt > ncur);
983 2258
984 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2259 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
985 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2260 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
986 { 2261 {
987 ncur *= elem; 2262 ncur *= elem;
988 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2263 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
989 ncur = ncur - sizeof (void *) * 4; 2264 ncur = ncur - sizeof (void *) * 4;
… …
991 } 2266 }
992 2267
993 return ncur; 2268 return ncur;
994} 2269}
995 2270
996static void * noinline ecb_cold 2271ecb_noinline ecb_cold
2272static void *
997array_realloc (int elem, void *base, int *cur, int cnt) 2273array_realloc (int elem, void *base, int *cur, int cnt)
998{ 2274{
999 *cur = array_nextsize (elem, *cur, cnt); 2275 *cur = array_nextsize (elem, *cur, cnt);
1000 return ev_realloc (base, elem * *cur); 2276 return ev_realloc (base, elem * *cur);
1001} 2277}
1002 2278
2279#define array_needsize_noinit(base,offset,count)
2280
1003#define array_init_zero(base,count) \ 2281#define array_needsize_zerofill(base,offset,count) \
1004 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2282 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
1005 2283
1006#define array_needsize(type,base,cur,cnt,init) \ 2284#define array_needsize(type,base,cur,cnt,init) \
1007 if (expect_false ((cnt) > (cur))) \ 2285 if (ecb_expect_false ((cnt) > (cur))) \
1008 { \ 2286 { \
1009 int ecb_unused ocur_ = (cur); \ 2287 ecb_unused int ocur_ = (cur); \
1010 (base) = (type *)array_realloc \ 2288 (base) = (type *)array_realloc \
1011 (sizeof (type), (base), &(cur), (cnt)); \ 2289 (sizeof (type), (base), &(cur), (cnt)); \
1012 init ((base) + (ocur_), (cur) - ocur_); \ 2290 init ((base), ocur_, ((cur) - ocur_)); \
1013 } 2291 }
1014 2292
1015#if 0 2293#if 0
1016#define array_slim(type,stem) \ 2294#define array_slim(type,stem) \
1017 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2295 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
1026 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2304 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1027 2305
1028/*****************************************************************************/ 2306/*****************************************************************************/
1029 2307
1030/* dummy callback for pending events */ 2308/* dummy callback for pending events */
1031static void noinline 2309ecb_noinline
2310static void
1032pendingcb (EV_P_ ev_prepare *w, int revents) 2311pendingcb (EV_P_ ev_prepare *w, int revents)
1033{ 2312{
1034} 2313}
1035 2314
1036void noinline 2315ecb_noinline
2316void
1037ev_feed_event (EV_P_ void *w, int revents) 2317ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
1038{ 2318{
1039 W w_ = (W)w; 2319 W w_ = (W)w;
1040 int pri = ABSPRI (w_); 2320 int pri = ABSPRI (w_);
1041 2321
1042 if (expect_false (w_->pending)) 2322 if (ecb_expect_false (w_->pending))
1043 pendings [pri][w_->pending - 1].events |= revents; 2323 pendings [pri][w_->pending - 1].events |= revents;
1044 else 2324 else
1045 { 2325 {
1046 w_->pending = ++pendingcnt [pri]; 2326 w_->pending = ++pendingcnt [pri];
1047 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2327 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
1048 pendings [pri][w_->pending - 1].w = w_; 2328 pendings [pri][w_->pending - 1].w = w_;
1049 pendings [pri][w_->pending - 1].events = revents; 2329 pendings [pri][w_->pending - 1].events = revents;
1050 } 2330 }
2331
2332 pendingpri = NUMPRI - 1;
1051} 2333}
1052 2334
1053inline_speed void 2335inline_speed void
1054feed_reverse (EV_P_ W w) 2336feed_reverse (EV_P_ W w)
1055{ 2337{
1056 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2338 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
1057 rfeeds [rfeedcnt++] = w; 2339 rfeeds [rfeedcnt++] = w;
1058} 2340}
1059 2341
1060inline_size void 2342inline_size void
1061feed_reverse_done (EV_P_ int revents) 2343feed_reverse_done (EV_P_ int revents)
… …
1096inline_speed void 2378inline_speed void
1097fd_event (EV_P_ int fd, int revents) 2379fd_event (EV_P_ int fd, int revents)
1098{ 2380{
1099 ANFD *anfd = anfds + fd; 2381 ANFD *anfd = anfds + fd;
1100 2382
1101 if (expect_true (!anfd->reify)) 2383 if (ecb_expect_true (!anfd->reify))
1102 fd_event_nocheck (EV_A_ fd, revents); 2384 fd_event_nocheck (EV_A_ fd, revents);
1103} 2385}
1104 2386
1105void 2387void
1106ev_feed_fd_event (EV_P_ int fd, int revents) 2388ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
1107{ 2389{
1108 if (fd >= 0 && fd < anfdmax) 2390 if (fd >= 0 && fd < anfdmax)
1109 fd_event_nocheck (EV_A_ fd, revents); 2391 fd_event_nocheck (EV_A_ fd, revents);
1110} 2392}
1111 2393
… …
1114inline_size void 2396inline_size void
1115fd_reify (EV_P) 2397fd_reify (EV_P)
1116{ 2398{
1117 int i; 2399 int i;
1118 2400
2401 /* most backends do not modify the fdchanges list in backend_modfiy.
2402 * except io_uring, which has fixed-size buffers which might force us
2403 * to handle events in backend_modify, causing fdchanges to be amended,
2404 * which could result in an endless loop.
2405 * to avoid this, we do not dynamically handle fds that were added
2406 * during fd_reify. that means that for those backends, fdchangecnt
2407 * might be non-zero during poll, which must cause them to not block.
2408 * to not put too much of a burden on other backends, this detail
2409 * needs to be handled in the backend.
2410 */
2411 int changecnt = fdchangecnt;
2412
1119#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2413#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1120 for (i = 0; i < fdchangecnt; ++i) 2414 for (i = 0; i < changecnt; ++i)
1121 { 2415 {
1122 int fd = fdchanges [i]; 2416 int fd = fdchanges [i];
1123 ANFD *anfd = anfds + fd; 2417 ANFD *anfd = anfds + fd;
1124 2418
1125 if (anfd->reify & EV__IOFDSET && anfd->head) 2419 if (anfd->reify & EV__IOFDSET && anfd->head)
… …
1139 } 2433 }
1140 } 2434 }
1141 } 2435 }
1142#endif 2436#endif
1143 2437
1144 for (i = 0; i < fdchangecnt; ++i) 2438 for (i = 0; i < changecnt; ++i)
1145 { 2439 {
1146 int fd = fdchanges [i]; 2440 int fd = fdchanges [i];
1147 ANFD *anfd = anfds + fd; 2441 ANFD *anfd = anfds + fd;
1148 ev_io *w; 2442 ev_io *w;
1149 2443
1150 unsigned char o_events = anfd->events; 2444 unsigned char o_events = anfd->events;
1151 unsigned char o_reify = anfd->reify; 2445 unsigned char o_reify = anfd->reify;
1152 2446
1153 anfd->reify = 0; 2447 anfd->reify = 0;
1154 2448
1155 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2449 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1156 { 2450 {
1157 anfd->events = 0; 2451 anfd->events = 0;
1158 2452
1159 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2453 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1160 anfd->events |= (unsigned char)w->events; 2454 anfd->events |= (unsigned char)w->events;
… …
1165 2459
1166 if (o_reify & EV__IOFDSET) 2460 if (o_reify & EV__IOFDSET)
1167 backend_modify (EV_A_ fd, o_events, anfd->events); 2461 backend_modify (EV_A_ fd, o_events, anfd->events);
1168 } 2462 }
1169 2463
2464 /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
2465 * this is a rare case (see beginning comment in this function), so we copy them to the
2466 * front and hope the backend handles this case.
2467 */
2468 if (ecb_expect_false (fdchangecnt != changecnt))
2469 memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
2470
1170 fdchangecnt = 0; 2471 fdchangecnt -= changecnt;
1171} 2472}
1172 2473
1173/* something about the given fd changed */ 2474/* something about the given fd changed */
1174inline_size void 2475inline_size
2476void
1175fd_change (EV_P_ int fd, int flags) 2477fd_change (EV_P_ int fd, int flags)
1176{ 2478{
1177 unsigned char reify = anfds [fd].reify; 2479 unsigned char reify = anfds [fd].reify;
1178 anfds [fd].reify |= flags; 2480 anfds [fd].reify = reify | flags;
1179 2481
1180 if (expect_true (!reify)) 2482 if (ecb_expect_true (!reify))
1181 { 2483 {
1182 ++fdchangecnt; 2484 ++fdchangecnt;
1183 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2485 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1184 fdchanges [fdchangecnt - 1] = fd; 2486 fdchanges [fdchangecnt - 1] = fd;
1185 } 2487 }
1186} 2488}
1187 2489
1188/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2490/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1189inline_speed void ecb_cold 2491inline_speed ecb_cold void
1190fd_kill (EV_P_ int fd) 2492fd_kill (EV_P_ int fd)
1191{ 2493{
1192 ev_io *w; 2494 ev_io *w;
1193 2495
1194 while ((w = (ev_io *)anfds [fd].head)) 2496 while ((w = (ev_io *)anfds [fd].head))
… …
1197 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2499 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1198 } 2500 }
1199} 2501}
1200 2502
1201/* check whether the given fd is actually valid, for error recovery */ 2503/* check whether the given fd is actually valid, for error recovery */
1202inline_size int ecb_cold 2504inline_size ecb_cold int
1203fd_valid (int fd) 2505fd_valid (int fd)
1204{ 2506{
1205#ifdef _WIN32 2507#ifdef _WIN32
1206 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2508 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1207#else 2509#else
1208 return fcntl (fd, F_GETFD) != -1; 2510 return fcntl (fd, F_GETFD) != -1;
1209#endif 2511#endif
1210} 2512}
1211 2513
1212/* called on EBADF to verify fds */ 2514/* called on EBADF to verify fds */
1213static void noinline ecb_cold 2515ecb_noinline ecb_cold
2516static void
1214fd_ebadf (EV_P) 2517fd_ebadf (EV_P)
1215{ 2518{
1216 int fd; 2519 int fd;
1217 2520
1218 for (fd = 0; fd < anfdmax; ++fd) 2521 for (fd = 0; fd < anfdmax; ++fd)
… …
1220 if (!fd_valid (fd) && errno == EBADF) 2523 if (!fd_valid (fd) && errno == EBADF)
1221 fd_kill (EV_A_ fd); 2524 fd_kill (EV_A_ fd);
1222} 2525}
1223 2526
1224/* called on ENOMEM in select/poll to kill some fds and retry */ 2527/* called on ENOMEM in select/poll to kill some fds and retry */
1225static void noinline ecb_cold 2528ecb_noinline ecb_cold
2529static void
1226fd_enomem (EV_P) 2530fd_enomem (EV_P)
1227{ 2531{
1228 int fd; 2532 int fd;
1229 2533
1230 for (fd = anfdmax; fd--; ) 2534 for (fd = anfdmax; fd--; )
… …
1234 break; 2538 break;
1235 } 2539 }
1236} 2540}
1237 2541
1238/* usually called after fork if backend needs to re-arm all fds from scratch */ 2542/* usually called after fork if backend needs to re-arm all fds from scratch */
1239static void noinline 2543ecb_noinline
2544static void
1240fd_rearm_all (EV_P) 2545fd_rearm_all (EV_P)
1241{ 2546{
1242 int fd; 2547 int fd;
1243 2548
1244 for (fd = 0; fd < anfdmax; ++fd) 2549 for (fd = 0; fd < anfdmax; ++fd)
… …
1297 ev_tstamp minat; 2602 ev_tstamp minat;
1298 ANHE *minpos; 2603 ANHE *minpos;
1299 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2604 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1300 2605
1301 /* find minimum child */ 2606 /* find minimum child */
1302 if (expect_true (pos + DHEAP - 1 < E)) 2607 if (ecb_expect_true (pos + DHEAP - 1 < E))
1303 { 2608 {
1304 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2609 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1305 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2610 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1306 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2611 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1307 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2612 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1308 } 2613 }
1309 else if (pos < E) 2614 else if (pos < E)
1310 { 2615 {
1311 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2616 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1312 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2617 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1313 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2618 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1314 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2619 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1315 } 2620 }
1316 else 2621 else
1317 break; 2622 break;
1318 2623
1319 if (ANHE_at (he) <= minat) 2624 if (ANHE_at (he) <= minat)
… …
1327 2632
1328 heap [k] = he; 2633 heap [k] = he;
1329 ev_active (ANHE_w (he)) = k; 2634 ev_active (ANHE_w (he)) = k;
1330} 2635}
1331 2636
1332#else /* 4HEAP */ 2637#else /* not 4HEAP */
1333 2638
1334#define HEAP0 1 2639#define HEAP0 1
1335#define HPARENT(k) ((k) >> 1) 2640#define HPARENT(k) ((k) >> 1)
1336#define UPHEAP_DONE(p,k) (!(p)) 2641#define UPHEAP_DONE(p,k) (!(p))
1337 2642
… …
1409 upheap (heap, i + HEAP0); 2714 upheap (heap, i + HEAP0);
1410} 2715}
1411 2716
1412/*****************************************************************************/ 2717/*****************************************************************************/
1413 2718
1414/* associate signal watchers to a signal signal */ 2719/* associate signal watchers to a signal */
1415typedef struct 2720typedef struct
1416{ 2721{
1417 EV_ATOMIC_T pending; 2722 EV_ATOMIC_T pending;
1418#if EV_MULTIPLICITY 2723#if EV_MULTIPLICITY
1419 EV_P; 2724 EV_P;
… …
1425 2730
1426/*****************************************************************************/ 2731/*****************************************************************************/
1427 2732
1428#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2733#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1429 2734
1430static void noinline ecb_cold 2735ecb_noinline ecb_cold
2736static void
1431evpipe_init (EV_P) 2737evpipe_init (EV_P)
1432{ 2738{
1433 if (!ev_is_active (&pipe_w)) 2739 if (!ev_is_active (&pipe_w))
1434 { 2740 {
2741 int fds [2];
2742
1435# if EV_USE_EVENTFD 2743# if EV_USE_EVENTFD
2744 fds [0] = -1;
1436 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2745 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1437 if (evfd < 0 && errno == EINVAL) 2746 if (fds [1] < 0 && errno == EINVAL)
1438 evfd = eventfd (0, 0); 2747 fds [1] = eventfd (0, 0);
1439 2748
1440 if (evfd >= 0) 2749 if (fds [1] < 0)
2750# endif
1441 { 2751 {
2752 while (pipe (fds))
2753 ev_syserr ("(libev) error creating signal/async pipe");
2754
2755 fd_intern (fds [0]);
2756 }
2757
1442 evpipe [0] = -1; 2758 evpipe [0] = fds [0];
1443 fd_intern (evfd); /* doing it twice doesn't hurt */ 2759
1444 ev_io_set (&pipe_w, evfd, EV_READ); 2760 if (evpipe [1] < 0)
2761 evpipe [1] = fds [1]; /* first call, set write fd */
2762 else
2763 {
2764 /* on subsequent calls, do not change evpipe [1] */
2765 /* so that evpipe_write can always rely on its value. */
2766 /* this branch does not do anything sensible on windows, */
2767 /* so must not be executed on windows */
2768
2769 dup2 (fds [1], evpipe [1]);
2770 close (fds [1]);
2771 }
2772
2773 fd_intern (evpipe [1]);
2774
2775 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2776 ev_io_start (EV_A_ &pipe_w);
2777 ev_unref (EV_A); /* watcher should not keep loop alive */
2778 }
2779}
2780
2781inline_speed void
2782evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2783{
2784 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2785
2786 if (ecb_expect_true (*flag))
2787 return;
2788
2789 *flag = 1;
2790 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2791
2792 pipe_write_skipped = 1;
2793
2794 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2795
2796 if (pipe_write_wanted)
2797 {
2798 int old_errno;
2799
2800 pipe_write_skipped = 0;
2801 ECB_MEMORY_FENCE_RELEASE;
2802
2803 old_errno = errno; /* save errno because write will clobber it */
2804
2805#if EV_USE_EVENTFD
2806 if (evpipe [0] < 0)
2807 {
2808 uint64_t counter = 1;
2809 write (evpipe [1], &counter, sizeof (uint64_t));
1445 } 2810 }
1446 else 2811 else
1447# endif 2812#endif
1448 { 2813 {
1449 while (pipe (evpipe)) 2814#ifdef _WIN32
1450 ev_syserr ("(libev) error creating signal/async pipe"); 2815 WSABUF buf;
1451 2816 DWORD sent;
1452 fd_intern (evpipe [0]); 2817 buf.buf = (char *)&buf;
1453 fd_intern (evpipe [1]); 2818 buf.len = 1;
1454 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2819 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1455 } 2820#else
1456
1457 ev_io_start (EV_A_ &pipe_w);
1458 ev_unref (EV_A); /* watcher should not keep loop alive */
1459 }
1460}
1461
1462inline_speed void
1463evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1464{
1465 if (expect_true (*flag))
1466 return;
1467
1468 *flag = 1;
1469
1470 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1471
1472 pipe_write_skipped = 1;
1473
1474 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1475
1476 if (pipe_write_wanted)
1477 {
1478 int old_errno;
1479
1480 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1481
1482 old_errno = errno; /* save errno because write will clobber it */
1483
1484#if EV_USE_EVENTFD
1485 if (evfd >= 0)
1486 {
1487 uint64_t counter = 1;
1488 write (evfd, &counter, sizeof (uint64_t));
1489 }
1490 else
1491#endif
1492 {
1493 /* win32 people keep sending patches that change this write() to send() */
1494 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1495 /* so when you think this write should be a send instead, please find out */
1496 /* where your send() is from - it's definitely not the microsoft send, and */
1497 /* tell me. thank you. */
1498 write (evpipe [1], &(evpipe [1]), 1); 2821 write (evpipe [1], &(evpipe [1]), 1);
2822#endif
1499 } 2823 }
1500 2824
1501 errno = old_errno; 2825 errno = old_errno;
1502 } 2826 }
1503} 2827}
… …
1510 int i; 2834 int i;
1511 2835
1512 if (revents & EV_READ) 2836 if (revents & EV_READ)
1513 { 2837 {
1514#if EV_USE_EVENTFD 2838#if EV_USE_EVENTFD
1515 if (evfd >= 0) 2839 if (evpipe [0] < 0)
1516 { 2840 {
1517 uint64_t counter; 2841 uint64_t counter;
1518 read (evfd, &counter, sizeof (uint64_t)); 2842 read (evpipe [1], &counter, sizeof (uint64_t));
1519 } 2843 }
1520 else 2844 else
1521#endif 2845#endif
1522 { 2846 {
1523 char dummy; 2847 char dummy[4];
1524 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2848#ifdef _WIN32
2849 WSABUF buf;
2850 DWORD recvd;
2851 DWORD flags = 0;
2852 buf.buf = dummy;
2853 buf.len = sizeof (dummy);
2854 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2855#else
1525 read (evpipe [0], &dummy, 1); 2856 read (evpipe [0], &dummy, sizeof (dummy));
2857#endif
1526 } 2858 }
1527 } 2859 }
1528 2860
1529 pipe_write_skipped = 0; 2861 pipe_write_skipped = 0;
2862
2863 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1530 2864
1531#if EV_SIGNAL_ENABLE 2865#if EV_SIGNAL_ENABLE
1532 if (sig_pending) 2866 if (sig_pending)
1533 { 2867 {
1534 sig_pending = 0; 2868 sig_pending = 0;
1535 2869
2870 ECB_MEMORY_FENCE;
2871
1536 for (i = EV_NSIG - 1; i--; ) 2872 for (i = EV_NSIG - 1; i--; )
1537 if (expect_false (signals [i].pending)) 2873 if (ecb_expect_false (signals [i].pending))
1538 ev_feed_signal_event (EV_A_ i + 1); 2874 ev_feed_signal_event (EV_A_ i + 1);
1539 } 2875 }
1540#endif 2876#endif
1541 2877
1542#if EV_ASYNC_ENABLE 2878#if EV_ASYNC_ENABLE
1543 if (async_pending) 2879 if (async_pending)
1544 { 2880 {
1545 async_pending = 0; 2881 async_pending = 0;
2882
2883 ECB_MEMORY_FENCE;
1546 2884
1547 for (i = asynccnt; i--; ) 2885 for (i = asynccnt; i--; )
1548 if (asyncs [i]->sent) 2886 if (asyncs [i]->sent)
1549 { 2887 {
1550 asyncs [i]->sent = 0; 2888 asyncs [i]->sent = 0;
2889 ECB_MEMORY_FENCE_RELEASE;
1551 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2890 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1552 } 2891 }
1553 } 2892 }
1554#endif 2893#endif
1555} 2894}
1556 2895
1557/*****************************************************************************/ 2896/*****************************************************************************/
1558 2897
1559void 2898void
1560ev_feed_signal (int signum) 2899ev_feed_signal (int signum) EV_NOEXCEPT
1561{ 2900{
1562#if EV_MULTIPLICITY 2901#if EV_MULTIPLICITY
2902 EV_P;
2903 ECB_MEMORY_FENCE_ACQUIRE;
1563 EV_P = signals [signum - 1].loop; 2904 EV_A = signals [signum - 1].loop;
1564 2905
1565 if (!EV_A) 2906 if (!EV_A)
1566 return; 2907 return;
1567#endif 2908#endif
1568 2909
1569 if (!ev_active (&pipe_w))
1570 return;
1571
1572 signals [signum - 1].pending = 1; 2910 signals [signum - 1].pending = 1;
1573 evpipe_write (EV_A_ &sig_pending); 2911 evpipe_write (EV_A_ &sig_pending);
1574} 2912}
1575 2913
1576static void 2914static void
… …
1581#endif 2919#endif
1582 2920
1583 ev_feed_signal (signum); 2921 ev_feed_signal (signum);
1584} 2922}
1585 2923
1586void noinline 2924ecb_noinline
2925void
1587ev_feed_signal_event (EV_P_ int signum) 2926ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1588{ 2927{
1589 WL w; 2928 WL w;
1590 2929
1591 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2930 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1592 return; 2931 return;
1593 2932
1594 --signum; 2933 --signum;
1595 2934
1596#if EV_MULTIPLICITY 2935#if EV_MULTIPLICITY
1597 /* it is permissible to try to feed a signal to the wrong loop */ 2936 /* it is permissible to try to feed a signal to the wrong loop */
1598 /* or, likely more useful, feeding a signal nobody is waiting for */ 2937 /* or, likely more useful, feeding a signal nobody is waiting for */
1599 2938
1600 if (expect_false (signals [signum].loop != EV_A)) 2939 if (ecb_expect_false (signals [signum].loop != EV_A))
1601 return; 2940 return;
1602#endif 2941#endif
1603 2942
1604 signals [signum].pending = 0; 2943 signals [signum].pending = 0;
2944 ECB_MEMORY_FENCE_RELEASE;
1605 2945
1606 for (w = signals [signum].head; w; w = w->next) 2946 for (w = signals [signum].head; w; w = w->next)
1607 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2947 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1608} 2948}
1609 2949
… …
1688 3028
1689#endif 3029#endif
1690 3030
1691/*****************************************************************************/ 3031/*****************************************************************************/
1692 3032
3033#if EV_USE_TIMERFD
3034
3035static void periodics_reschedule (EV_P);
3036
3037static void
3038timerfdcb (EV_P_ ev_io *iow, int revents)
3039{
3040 struct itimerspec its = { 0 };
3041
3042 its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2;
3043 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
3044
3045 ev_rt_now = ev_time ();
3046 /* periodics_reschedule only needs ev_rt_now */
3047 /* but maybe in the future we want the full treatment. */
3048 /*
3049 now_floor = EV_TS_CONST (0.);
3050 time_update (EV_A_ EV_TSTAMP_HUGE);
3051 */
3052#if EV_PERIODIC_ENABLE
3053 periodics_reschedule (EV_A);
3054#endif
3055}
3056
3057ecb_noinline ecb_cold
3058static void
3059evtimerfd_init (EV_P)
3060{
3061 if (!ev_is_active (&timerfd_w))
3062 {
3063 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
3064
3065 if (timerfd >= 0)
3066 {
3067 fd_intern (timerfd); /* just to be sure */
3068
3069 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
3070 ev_set_priority (&timerfd_w, EV_MINPRI);
3071 ev_io_start (EV_A_ &timerfd_w);
3072 ev_unref (EV_A); /* watcher should not keep loop alive */
3073
3074 /* (re-) arm timer */
3075 timerfdcb (EV_A_ 0, 0);
3076 }
3077 }
3078}
3079
3080#endif
3081
3082/*****************************************************************************/
3083
1693#if EV_USE_IOCP 3084#if EV_USE_IOCP
1694# include "ev_iocp.c" 3085# include "ev_iocp.c"
1695#endif 3086#endif
1696#if EV_USE_PORT 3087#if EV_USE_PORT
1697# include "ev_port.c" 3088# include "ev_port.c"
… …
1700# include "ev_kqueue.c" 3091# include "ev_kqueue.c"
1701#endif 3092#endif
1702#if EV_USE_EPOLL 3093#if EV_USE_EPOLL
1703# include "ev_epoll.c" 3094# include "ev_epoll.c"
1704#endif 3095#endif
3096#if EV_USE_LINUXAIO
3097# include "ev_linuxaio.c"
3098#endif
3099#if EV_USE_IOURING
3100# include "ev_iouring.c"
3101#endif
1705#if EV_USE_POLL 3102#if EV_USE_POLL
1706# include "ev_poll.c" 3103# include "ev_poll.c"
1707#endif 3104#endif
1708#if EV_USE_SELECT 3105#if EV_USE_SELECT
1709# include "ev_select.c" 3106# include "ev_select.c"
1710#endif 3107#endif
1711 3108
1712int ecb_cold 3109ecb_cold int
1713ev_version_major (void) 3110ev_version_major (void) EV_NOEXCEPT
1714{ 3111{
1715 return EV_VERSION_MAJOR; 3112 return EV_VERSION_MAJOR;
1716} 3113}
1717 3114
1718int ecb_cold 3115ecb_cold int
1719ev_version_minor (void) 3116ev_version_minor (void) EV_NOEXCEPT
1720{ 3117{
1721 return EV_VERSION_MINOR; 3118 return EV_VERSION_MINOR;
1722} 3119}
1723 3120
1724/* return true if we are running with elevated privileges and should ignore env variables */ 3121/* return true if we are running with elevated privileges and should ignore env variables */
1725int inline_size ecb_cold 3122inline_size ecb_cold int
1726enable_secure (void) 3123enable_secure (void)
1727{ 3124{
1728#ifdef _WIN32 3125#ifdef _WIN32
1729 return 0; 3126 return 0;
1730#else 3127#else
1731 return getuid () != geteuid () 3128 return getuid () != geteuid ()
1732 || getgid () != getegid (); 3129 || getgid () != getegid ();
1733#endif 3130#endif
1734} 3131}
1735 3132
1736unsigned int ecb_cold 3133ecb_cold
3134unsigned int
1737ev_supported_backends (void) 3135ev_supported_backends (void) EV_NOEXCEPT
1738{ 3136{
1739 unsigned int flags = 0; 3137 unsigned int flags = 0;
1740 3138
1741 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3139 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1742 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3140 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1743 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3141 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1744 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3142 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1745 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3143 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1746 3144 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3145 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3146
1747 return flags; 3147 return flags;
1748} 3148}
1749 3149
1750unsigned int ecb_cold 3150ecb_cold
3151unsigned int
1751ev_recommended_backends (void) 3152ev_recommended_backends (void) EV_NOEXCEPT
1752{ 3153{
1753 unsigned int flags = ev_supported_backends (); 3154 unsigned int flags = ev_supported_backends ();
1754 3155
1755#ifndef __NetBSD__ 3156#ifndef __NetBSD__
1756 /* kqueue is borked on everything but netbsd apparently */ 3157 /* kqueue is borked on everything but netbsd apparently */
… …
1764#endif 3165#endif
1765#ifdef __FreeBSD__ 3166#ifdef __FreeBSD__
1766 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 3167 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1767#endif 3168#endif
1768 3169
3170 /* TODO: linuxaio is very experimental */
3171#if !EV_RECOMMEND_LINUXAIO
3172 flags &= ~EVBACKEND_LINUXAIO;
3173#endif
3174 /* TODO: iouring is super experimental */
3175#if !EV_RECOMMEND_IOURING
3176 flags &= ~EVBACKEND_IOURING;
3177#endif
3178
1769 return flags; 3179 return flags;
1770} 3180}
1771 3181
1772unsigned int ecb_cold 3182ecb_cold
3183unsigned int
1773ev_embeddable_backends (void) 3184ev_embeddable_backends (void) EV_NOEXCEPT
1774{ 3185{
1775 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3186 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
1776 3187
1777 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 3188 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1778 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 3189 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1779 flags &= ~EVBACKEND_EPOLL; 3190 flags &= ~EVBACKEND_EPOLL;
1780 3191
3192 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
3193
1781 return flags; 3194 return flags;
1782} 3195}
1783 3196
1784unsigned int 3197unsigned int
1785ev_backend (EV_P) 3198ev_backend (EV_P) EV_NOEXCEPT
1786{ 3199{
1787 return backend; 3200 return backend;
1788} 3201}
1789 3202
1790#if EV_FEATURE_API 3203#if EV_FEATURE_API
1791unsigned int 3204unsigned int
1792ev_iteration (EV_P) 3205ev_iteration (EV_P) EV_NOEXCEPT
1793{ 3206{
1794 return loop_count; 3207 return loop_count;
1795} 3208}
1796 3209
1797unsigned int 3210unsigned int
1798ev_depth (EV_P) 3211ev_depth (EV_P) EV_NOEXCEPT
1799{ 3212{
1800 return loop_depth; 3213 return loop_depth;
1801} 3214}
1802 3215
1803void 3216void
1804ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3217ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1805{ 3218{
1806 io_blocktime = interval; 3219 io_blocktime = interval;
1807} 3220}
1808 3221
1809void 3222void
1810ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3223ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1811{ 3224{
1812 timeout_blocktime = interval; 3225 timeout_blocktime = interval;
1813} 3226}
1814 3227
1815void 3228void
1816ev_set_userdata (EV_P_ void *data) 3229ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1817{ 3230{
1818 userdata = data; 3231 userdata = data;
1819} 3232}
1820 3233
1821void * 3234void *
1822ev_userdata (EV_P) 3235ev_userdata (EV_P) EV_NOEXCEPT
1823{ 3236{
1824 return userdata; 3237 return userdata;
1825} 3238}
1826 3239
1827void 3240void
1828ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 3241ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1829{ 3242{
1830 invoke_cb = invoke_pending_cb; 3243 invoke_cb = invoke_pending_cb;
1831} 3244}
1832 3245
1833void 3246void
1834ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 3247ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1835{ 3248{
1836 release_cb = release; 3249 release_cb = release;
1837 acquire_cb = acquire; 3250 acquire_cb = acquire;
1838} 3251}
1839#endif 3252#endif
1840 3253
1841/* initialise a loop structure, must be zero-initialised */ 3254/* initialise a loop structure, must be zero-initialised */
1842static void noinline ecb_cold 3255ecb_noinline ecb_cold
3256static void
1843loop_init (EV_P_ unsigned int flags) 3257loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1844{ 3258{
1845 if (!backend) 3259 if (!backend)
1846 { 3260 {
1847 origflags = flags; 3261 origflags = flags;
1848 3262
… …
1893#if EV_ASYNC_ENABLE 3307#if EV_ASYNC_ENABLE
1894 async_pending = 0; 3308 async_pending = 0;
1895#endif 3309#endif
1896 pipe_write_skipped = 0; 3310 pipe_write_skipped = 0;
1897 pipe_write_wanted = 0; 3311 pipe_write_wanted = 0;
3312 evpipe [0] = -1;
3313 evpipe [1] = -1;
1898#if EV_USE_INOTIFY 3314#if EV_USE_INOTIFY
1899 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3315 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1900#endif 3316#endif
1901#if EV_USE_SIGNALFD 3317#if EV_USE_SIGNALFD
1902 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3318 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1903#endif 3319#endif
3320#if EV_USE_TIMERFD
3321 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3322#endif
1904 3323
1905 if (!(flags & EVBACKEND_MASK)) 3324 if (!(flags & EVBACKEND_MASK))
1906 flags |= ev_recommended_backends (); 3325 flags |= ev_recommended_backends ();
1907 3326
1908#if EV_USE_IOCP 3327#if EV_USE_IOCP
1909 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 3328 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1910#endif 3329#endif
1911#if EV_USE_PORT 3330#if EV_USE_PORT
1912 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3331 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1913#endif 3332#endif
1914#if EV_USE_KQUEUE 3333#if EV_USE_KQUEUE
1915 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3334 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3335#endif
3336#if EV_USE_IOURING
3337 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3338#endif
3339#if EV_USE_LINUXAIO
3340 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1916#endif 3341#endif
1917#if EV_USE_EPOLL 3342#if EV_USE_EPOLL
1918 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3343 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1919#endif 3344#endif
1920#if EV_USE_POLL 3345#if EV_USE_POLL
1921 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3346 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1922#endif 3347#endif
1923#if EV_USE_SELECT 3348#if EV_USE_SELECT
1924 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3349 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1925#endif 3350#endif
1926 3351
1927 ev_prepare_init (&pending_w, pendingcb); 3352 ev_prepare_init (&pending_w, pendingcb);
1928 3353
1929#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3354#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1932#endif 3357#endif
1933 } 3358 }
1934} 3359}
1935 3360
1936/* free up a loop structure */ 3361/* free up a loop structure */
1937void ecb_cold 3362ecb_cold
3363void
1938ev_loop_destroy (EV_P) 3364ev_loop_destroy (EV_P)
1939{ 3365{
1940 int i; 3366 int i;
1941 3367
1942#if EV_MULTIPLICITY 3368#if EV_MULTIPLICITY
… …
1945 return; 3371 return;
1946#endif 3372#endif
1947 3373
1948#if EV_CLEANUP_ENABLE 3374#if EV_CLEANUP_ENABLE
1949 /* queue cleanup watchers (and execute them) */ 3375 /* queue cleanup watchers (and execute them) */
1950 if (expect_false (cleanupcnt)) 3376 if (ecb_expect_false (cleanupcnt))
1951 { 3377 {
1952 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); 3378 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1953 EV_INVOKE_PENDING; 3379 EV_INVOKE_PENDING;
1954 } 3380 }
1955#endif 3381#endif
1956 3382
1957#if EV_CHILD_ENABLE 3383#if EV_CHILD_ENABLE
1958 if (ev_is_active (&childev)) 3384 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1959 { 3385 {
1960 ev_ref (EV_A); /* child watcher */ 3386 ev_ref (EV_A); /* child watcher */
1961 ev_signal_stop (EV_A_ &childev); 3387 ev_signal_stop (EV_A_ &childev);
1962 } 3388 }
1963#endif 3389#endif
… …
1965 if (ev_is_active (&pipe_w)) 3391 if (ev_is_active (&pipe_w))
1966 { 3392 {
1967 /*ev_ref (EV_A);*/ 3393 /*ev_ref (EV_A);*/
1968 /*ev_io_stop (EV_A_ &pipe_w);*/ 3394 /*ev_io_stop (EV_A_ &pipe_w);*/
1969 3395
1970#if EV_USE_EVENTFD
1971 if (evfd >= 0)
1972 close (evfd);
1973#endif
1974
1975 if (evpipe [0] >= 0)
1976 {
1977 EV_WIN32_CLOSE_FD (evpipe [0]); 3396 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1978 EV_WIN32_CLOSE_FD (evpipe [1]); 3397 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1979 }
1980 } 3398 }
1981 3399
1982#if EV_USE_SIGNALFD 3400#if EV_USE_SIGNALFD
1983 if (ev_is_active (&sigfd_w)) 3401 if (ev_is_active (&sigfd_w))
1984 close (sigfd); 3402 close (sigfd);
1985#endif 3403#endif
1986 3404
3405#if EV_USE_TIMERFD
3406 if (ev_is_active (&timerfd_w))
3407 close (timerfd);
3408#endif
3409
1987#if EV_USE_INOTIFY 3410#if EV_USE_INOTIFY
1988 if (fs_fd >= 0) 3411 if (fs_fd >= 0)
1989 close (fs_fd); 3412 close (fs_fd);
1990#endif 3413#endif
1991 3414
1992 if (backend_fd >= 0) 3415 if (backend_fd >= 0)
1993 close (backend_fd); 3416 close (backend_fd);
1994 3417
1995#if EV_USE_IOCP 3418#if EV_USE_IOCP
1996 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); 3419 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1997#endif 3420#endif
1998#if EV_USE_PORT 3421#if EV_USE_PORT
1999 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3422 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2000#endif 3423#endif
2001#if EV_USE_KQUEUE 3424#if EV_USE_KQUEUE
2002 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3425 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3426#endif
3427#if EV_USE_IOURING
3428 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3429#endif
3430#if EV_USE_LINUXAIO
3431 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
2003#endif 3432#endif
2004#if EV_USE_EPOLL 3433#if EV_USE_EPOLL
2005 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3434 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2006#endif 3435#endif
2007#if EV_USE_POLL 3436#if EV_USE_POLL
2008 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3437 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2009#endif 3438#endif
2010#if EV_USE_SELECT 3439#if EV_USE_SELECT
2011 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3440 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
2012#endif 3441#endif
2013 3442
2014 for (i = NUMPRI; i--; ) 3443 for (i = NUMPRI; i--; )
2015 { 3444 {
2016 array_free (pending, [i]); 3445 array_free (pending, [i]);
… …
2058 3487
2059inline_size void 3488inline_size void
2060loop_fork (EV_P) 3489loop_fork (EV_P)
2061{ 3490{
2062#if EV_USE_PORT 3491#if EV_USE_PORT
2063 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3492 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2064#endif 3493#endif
2065#if EV_USE_KQUEUE 3494#if EV_USE_KQUEUE
2066 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3495 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3496#endif
3497#if EV_USE_IOURING
3498 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3499#endif
3500#if EV_USE_LINUXAIO
3501 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
2067#endif 3502#endif
2068#if EV_USE_EPOLL 3503#if EV_USE_EPOLL
2069 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3504 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2070#endif 3505#endif
2071#if EV_USE_INOTIFY 3506#if EV_USE_INOTIFY
2072 infy_fork (EV_A); 3507 infy_fork (EV_A);
2073#endif 3508#endif
2074 3509
3510 if (postfork != 2)
3511 {
3512 #if EV_USE_SIGNALFD
3513 /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */
3514 #endif
3515
3516 #if EV_USE_TIMERFD
3517 if (ev_is_active (&timerfd_w))
3518 {
3519 ev_ref (EV_A);
3520 ev_io_stop (EV_A_ &timerfd_w);
3521
3522 close (timerfd);
3523 timerfd = -2;
3524
3525 evtimerfd_init (EV_A);
3526 /* reschedule periodics, in case we missed something */
3527 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
3528 }
3529 #endif
3530
3531 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2075 if (ev_is_active (&pipe_w)) 3532 if (ev_is_active (&pipe_w))
2076 { 3533 {
2077 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 3534 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2078 3535
2079 ev_ref (EV_A); 3536 ev_ref (EV_A);
2080 ev_io_stop (EV_A_ &pipe_w); 3537 ev_io_stop (EV_A_ &pipe_w);
2081 3538
2082#if EV_USE_EVENTFD
2083 if (evfd >= 0)
2084 close (evfd);
2085#endif
2086
2087 if (evpipe [0] >= 0) 3539 if (evpipe [0] >= 0)
2088 {
2089 EV_WIN32_CLOSE_FD (evpipe [0]); 3540 EV_WIN32_CLOSE_FD (evpipe [0]);
2090 EV_WIN32_CLOSE_FD (evpipe [1]); 3541
3542 evpipe_init (EV_A);
3543 /* iterate over everything, in case we missed something before */
3544 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2091 } 3545 }
2092 3546 #endif
2093#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2094 evpipe_init (EV_A);
2095 /* now iterate over everything, in case we missed something */
2096 pipecb (EV_A_ &pipe_w, EV_READ);
2097#endif
2098 } 3547 }
2099 3548
2100 postfork = 0; 3549 postfork = 0;
2101} 3550}
2102 3551
2103#if EV_MULTIPLICITY 3552#if EV_MULTIPLICITY
2104 3553
3554ecb_cold
2105struct ev_loop * ecb_cold 3555struct ev_loop *
2106ev_loop_new (unsigned int flags) 3556ev_loop_new (unsigned int flags) EV_NOEXCEPT
2107{ 3557{
2108 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3558 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2109 3559
2110 memset (EV_A, 0, sizeof (struct ev_loop)); 3560 memset (EV_A, 0, sizeof (struct ev_loop));
2111 loop_init (EV_A_ flags); 3561 loop_init (EV_A_ flags);
… …
2118} 3568}
2119 3569
2120#endif /* multiplicity */ 3570#endif /* multiplicity */
2121 3571
2122#if EV_VERIFY 3572#if EV_VERIFY
2123static void noinline ecb_cold 3573ecb_noinline ecb_cold
3574static void
2124verify_watcher (EV_P_ W w) 3575verify_watcher (EV_P_ W w)
2125{ 3576{
2126 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3577 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2127 3578
2128 if (w->pending) 3579 if (w->pending)
2129 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3580 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2130} 3581}
2131 3582
2132static void noinline ecb_cold 3583ecb_noinline ecb_cold
3584static void
2133verify_heap (EV_P_ ANHE *heap, int N) 3585verify_heap (EV_P_ ANHE *heap, int N)
2134{ 3586{
2135 int i; 3587 int i;
2136 3588
2137 for (i = HEAP0; i < N + HEAP0; ++i) 3589 for (i = HEAP0; i < N + HEAP0; ++i)
… …
2142 3594
2143 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3595 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2144 } 3596 }
2145} 3597}
2146 3598
2147static void noinline ecb_cold 3599ecb_noinline ecb_cold
3600static void
2148array_verify (EV_P_ W *ws, int cnt) 3601array_verify (EV_P_ W *ws, int cnt)
2149{ 3602{
2150 while (cnt--) 3603 while (cnt--)
2151 { 3604 {
2152 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3605 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
2155} 3608}
2156#endif 3609#endif
2157 3610
2158#if EV_FEATURE_API 3611#if EV_FEATURE_API
2159void ecb_cold 3612void ecb_cold
2160ev_verify (EV_P) 3613ev_verify (EV_P) EV_NOEXCEPT
2161{ 3614{
2162#if EV_VERIFY 3615#if EV_VERIFY
2163 int i; 3616 int i;
2164 WL w; 3617 WL w, w2;
2165 3618
2166 assert (activecnt >= -1); 3619 assert (activecnt >= -1);
2167 3620
2168 assert (fdchangemax >= fdchangecnt); 3621 assert (fdchangemax >= fdchangecnt);
2169 for (i = 0; i < fdchangecnt; ++i) 3622 for (i = 0; i < fdchangecnt; ++i)
2170 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3623 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2171 3624
2172 assert (anfdmax >= 0); 3625 assert (anfdmax >= 0);
2173 for (i = 0; i < anfdmax; ++i) 3626 for (i = 0; i < anfdmax; ++i)
3627 {
3628 int j = 0;
3629
2174 for (w = anfds [i].head; w; w = w->next) 3630 for (w = w2 = anfds [i].head; w; w = w->next)
2175 { 3631 {
2176 verify_watcher (EV_A_ (W)w); 3632 verify_watcher (EV_A_ (W)w);
3633
3634 if (j++ & 1)
3635 {
3636 assert (("libev: io watcher list contains a loop", w != w2));
3637 w2 = w2->next;
3638 }
3639
2177 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3640 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2178 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3641 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2179 } 3642 }
3643 }
2180 3644
2181 assert (timermax >= timercnt); 3645 assert (timermax >= timercnt);
2182 verify_heap (EV_A_ timers, timercnt); 3646 verify_heap (EV_A_ timers, timercnt);
2183 3647
2184#if EV_PERIODIC_ENABLE 3648#if EV_PERIODIC_ENABLE
… …
2230#endif 3694#endif
2231} 3695}
2232#endif 3696#endif
2233 3697
2234#if EV_MULTIPLICITY 3698#if EV_MULTIPLICITY
3699ecb_cold
2235struct ev_loop * ecb_cold 3700struct ev_loop *
2236#else 3701#else
2237int 3702int
2238#endif 3703#endif
2239ev_default_loop (unsigned int flags) 3704ev_default_loop (unsigned int flags) EV_NOEXCEPT
2240{ 3705{
2241 if (!ev_default_loop_ptr) 3706 if (!ev_default_loop_ptr)
2242 { 3707 {
2243#if EV_MULTIPLICITY 3708#if EV_MULTIPLICITY
2244 EV_P = ev_default_loop_ptr = &default_loop_struct; 3709 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2263 3728
2264 return ev_default_loop_ptr; 3729 return ev_default_loop_ptr;
2265} 3730}
2266 3731
2267void 3732void
2268ev_loop_fork (EV_P) 3733ev_loop_fork (EV_P) EV_NOEXCEPT
2269{ 3734{
2270 postfork = 1; /* must be in line with ev_default_fork */ 3735 postfork = 1;
2271} 3736}
2272 3737
2273/*****************************************************************************/ 3738/*****************************************************************************/
2274 3739
2275void 3740void
… …
2277{ 3742{
2278 EV_CB_INVOKE ((W)w, revents); 3743 EV_CB_INVOKE ((W)w, revents);
2279} 3744}
2280 3745
2281unsigned int 3746unsigned int
2282ev_pending_count (EV_P) 3747ev_pending_count (EV_P) EV_NOEXCEPT
2283{ 3748{
2284 int pri; 3749 int pri;
2285 unsigned int count = 0; 3750 unsigned int count = 0;
2286 3751
2287 for (pri = NUMPRI; pri--; ) 3752 for (pri = NUMPRI; pri--; )
2288 count += pendingcnt [pri]; 3753 count += pendingcnt [pri];
2289 3754
2290 return count; 3755 return count;
2291} 3756}
2292 3757
2293void noinline 3758ecb_noinline
3759void
2294ev_invoke_pending (EV_P) 3760ev_invoke_pending (EV_P)
2295{ 3761{
2296 int pri; 3762 pendingpri = NUMPRI;
2297 3763
2298 for (pri = NUMPRI; pri--; ) 3764 do
3765 {
3766 --pendingpri;
3767
3768 /* pendingpri possibly gets modified in the inner loop */
2299 while (pendingcnt [pri]) 3769 while (pendingcnt [pendingpri])
2300 { 3770 {
2301 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3771 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2302 3772
2303 p->w->pending = 0; 3773 p->w->pending = 0;
2304 EV_CB_INVOKE (p->w, p->events); 3774 EV_CB_INVOKE (p->w, p->events);
2305 EV_FREQUENT_CHECK; 3775 EV_FREQUENT_CHECK;
2306 } 3776 }
3777 }
3778 while (pendingpri);
2307} 3779}
2308 3780
2309#if EV_IDLE_ENABLE 3781#if EV_IDLE_ENABLE
2310/* make idle watchers pending. this handles the "call-idle */ 3782/* make idle watchers pending. this handles the "call-idle */
2311/* only when higher priorities are idle" logic */ 3783/* only when higher priorities are idle" logic */
2312inline_size void 3784inline_size void
2313idle_reify (EV_P) 3785idle_reify (EV_P)
2314{ 3786{
2315 if (expect_false (idleall)) 3787 if (ecb_expect_false (idleall))
2316 { 3788 {
2317 int pri; 3789 int pri;
2318 3790
2319 for (pri = NUMPRI; pri--; ) 3791 for (pri = NUMPRI; pri--; )
2320 { 3792 {
… …
2350 { 3822 {
2351 ev_at (w) += w->repeat; 3823 ev_at (w) += w->repeat;
2352 if (ev_at (w) < mn_now) 3824 if (ev_at (w) < mn_now)
2353 ev_at (w) = mn_now; 3825 ev_at (w) = mn_now;
2354 3826
2355 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3827 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
2356 3828
2357 ANHE_at_cache (timers [HEAP0]); 3829 ANHE_at_cache (timers [HEAP0]);
2358 downheap (timers, timercnt, HEAP0); 3830 downheap (timers, timercnt, HEAP0);
2359 } 3831 }
2360 else 3832 else
… …
2369 } 3841 }
2370} 3842}
2371 3843
2372#if EV_PERIODIC_ENABLE 3844#if EV_PERIODIC_ENABLE
2373 3845
2374static void noinline 3846ecb_noinline
3847static void
2375periodic_recalc (EV_P_ ev_periodic *w) 3848periodic_recalc (EV_P_ ev_periodic *w)
2376{ 3849{
2377 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; 3850 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2378 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); 3851 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2379 3852
… …
2381 while (at <= ev_rt_now) 3854 while (at <= ev_rt_now)
2382 { 3855 {
2383 ev_tstamp nat = at + w->interval; 3856 ev_tstamp nat = at + w->interval;
2384 3857
2385 /* when resolution fails us, we use ev_rt_now */ 3858 /* when resolution fails us, we use ev_rt_now */
2386 if (expect_false (nat == at)) 3859 if (ecb_expect_false (nat == at))
2387 { 3860 {
2388 at = ev_rt_now; 3861 at = ev_rt_now;
2389 break; 3862 break;
2390 } 3863 }
2391 3864
… …
2401{ 3874{
2402 EV_FREQUENT_CHECK; 3875 EV_FREQUENT_CHECK;
2403 3876
2404 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3877 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2405 { 3878 {
2406 int feed_count = 0;
2407
2408 do 3879 do
2409 { 3880 {
2410 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3881 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2411 3882
2412 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3883 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2439 } 3910 }
2440} 3911}
2441 3912
2442/* simply recalculate all periodics */ 3913/* simply recalculate all periodics */
2443/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3914/* TODO: maybe ensure that at least one event happens when jumping forward? */
2444static void noinline ecb_cold 3915ecb_noinline ecb_cold
3916static void
2445periodics_reschedule (EV_P) 3917periodics_reschedule (EV_P)
2446{ 3918{
2447 int i; 3919 int i;
2448 3920
2449 /* adjust periodics after time jump */ 3921 /* adjust periodics after time jump */
… …
2462 reheap (periodics, periodiccnt); 3934 reheap (periodics, periodiccnt);
2463} 3935}
2464#endif 3936#endif
2465 3937
2466/* adjust all timers by a given offset */ 3938/* adjust all timers by a given offset */
2467static void noinline ecb_cold 3939ecb_noinline ecb_cold
3940static void
2468timers_reschedule (EV_P_ ev_tstamp adjust) 3941timers_reschedule (EV_P_ ev_tstamp adjust)
2469{ 3942{
2470 int i; 3943 int i;
2471 3944
2472 for (i = 0; i < timercnt; ++i) 3945 for (i = 0; i < timercnt; ++i)
… …
2481/* also detect if there was a timejump, and act accordingly */ 3954/* also detect if there was a timejump, and act accordingly */
2482inline_speed void 3955inline_speed void
2483time_update (EV_P_ ev_tstamp max_block) 3956time_update (EV_P_ ev_tstamp max_block)
2484{ 3957{
2485#if EV_USE_MONOTONIC 3958#if EV_USE_MONOTONIC
2486 if (expect_true (have_monotonic)) 3959 if (ecb_expect_true (have_monotonic))
2487 { 3960 {
2488 int i; 3961 int i;
2489 ev_tstamp odiff = rtmn_diff; 3962 ev_tstamp odiff = rtmn_diff;
2490 3963
2491 mn_now = get_clock (); 3964 mn_now = get_clock ();
2492 3965
2493 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3966 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2494 /* interpolate in the meantime */ 3967 /* interpolate in the meantime */
2495 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3968 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
2496 { 3969 {
2497 ev_rt_now = rtmn_diff + mn_now; 3970 ev_rt_now = rtmn_diff + mn_now;
2498 return; 3971 return;
2499 } 3972 }
2500 3973
… …
2514 ev_tstamp diff; 3987 ev_tstamp diff;
2515 rtmn_diff = ev_rt_now - mn_now; 3988 rtmn_diff = ev_rt_now - mn_now;
2516 3989
2517 diff = odiff - rtmn_diff; 3990 diff = odiff - rtmn_diff;
2518 3991
2519 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP)) 3992 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
2520 return; /* all is well */ 3993 return; /* all is well */
2521 3994
2522 ev_rt_now = ev_time (); 3995 ev_rt_now = ev_time ();
2523 mn_now = get_clock (); 3996 mn_now = get_clock ();
2524 now_floor = mn_now; 3997 now_floor = mn_now;
… …
2533 else 4006 else
2534#endif 4007#endif
2535 { 4008 {
2536 ev_rt_now = ev_time (); 4009 ev_rt_now = ev_time ();
2537 4010
2538 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 4011 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
2539 { 4012 {
2540 /* adjust timers. this is easy, as the offset is the same for all of them */ 4013 /* adjust timers. this is easy, as the offset is the same for all of them */
2541 timers_reschedule (EV_A_ ev_rt_now - mn_now); 4014 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2542#if EV_PERIODIC_ENABLE 4015#if EV_PERIODIC_ENABLE
2543 periodics_reschedule (EV_A); 4016 periodics_reschedule (EV_A);
… …
2546 4019
2547 mn_now = ev_rt_now; 4020 mn_now = ev_rt_now;
2548 } 4021 }
2549} 4022}
2550 4023
2551void 4024int
2552ev_run (EV_P_ int flags) 4025ev_run (EV_P_ int flags)
2553{ 4026{
2554#if EV_FEATURE_API 4027#if EV_FEATURE_API
2555 ++loop_depth; 4028 ++loop_depth;
2556#endif 4029#endif
… …
2566#if EV_VERIFY >= 2 4039#if EV_VERIFY >= 2
2567 ev_verify (EV_A); 4040 ev_verify (EV_A);
2568#endif 4041#endif
2569 4042
2570#ifndef _WIN32 4043#ifndef _WIN32
2571 if (expect_false (curpid)) /* penalise the forking check even more */ 4044 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2572 if (expect_false (getpid () != curpid)) 4045 if (ecb_expect_false (getpid () != curpid))
2573 { 4046 {
2574 curpid = getpid (); 4047 curpid = getpid ();
2575 postfork = 1; 4048 postfork = 1;
2576 } 4049 }
2577#endif 4050#endif
2578 4051
2579#if EV_FORK_ENABLE 4052#if EV_FORK_ENABLE
2580 /* we might have forked, so queue fork handlers */ 4053 /* we might have forked, so queue fork handlers */
2581 if (expect_false (postfork)) 4054 if (ecb_expect_false (postfork))
2582 if (forkcnt) 4055 if (forkcnt)
2583 { 4056 {
2584 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 4057 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2585 EV_INVOKE_PENDING; 4058 EV_INVOKE_PENDING;
2586 } 4059 }
2587#endif 4060#endif
2588 4061
2589#if EV_PREPARE_ENABLE 4062#if EV_PREPARE_ENABLE
2590 /* queue prepare watchers (and execute them) */ 4063 /* queue prepare watchers (and execute them) */
2591 if (expect_false (preparecnt)) 4064 if (ecb_expect_false (preparecnt))
2592 { 4065 {
2593 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 4066 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2594 EV_INVOKE_PENDING; 4067 EV_INVOKE_PENDING;
2595 } 4068 }
2596#endif 4069#endif
2597 4070
2598 if (expect_false (loop_done)) 4071 if (ecb_expect_false (loop_done))
2599 break; 4072 break;
2600 4073
2601 /* we might have forked, so reify kernel state if necessary */ 4074 /* we might have forked, so reify kernel state if necessary */
2602 if (expect_false (postfork)) 4075 if (ecb_expect_false (postfork))
2603 loop_fork (EV_A); 4076 loop_fork (EV_A);
2604 4077
2605 /* update fd-related kernel structures */ 4078 /* update fd-related kernel structures */
2606 fd_reify (EV_A); 4079 fd_reify (EV_A);
2607 4080
… …
2612 4085
2613 /* remember old timestamp for io_blocktime calculation */ 4086 /* remember old timestamp for io_blocktime calculation */
2614 ev_tstamp prev_mn_now = mn_now; 4087 ev_tstamp prev_mn_now = mn_now;
2615 4088
2616 /* update time to cancel out callback processing overhead */ 4089 /* update time to cancel out callback processing overhead */
2617 time_update (EV_A_ 1e100); 4090 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
2618 4091
2619 /* from now on, we want a pipe-wake-up */ 4092 /* from now on, we want a pipe-wake-up */
2620 pipe_write_wanted = 1; 4093 pipe_write_wanted = 1;
2621 4094
2622 ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */ 4095 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2623 4096
2624 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) 4097 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2625 { 4098 {
2626 waittime = MAX_BLOCKTIME; 4099 waittime = EV_TS_CONST (MAX_BLOCKTIME);
4100
4101#if EV_USE_MONOTONIC
4102 if (ecb_expect_true (have_monotonic))
4103 {
4104#if EV_USE_TIMERFD
4105 /* sleep a lot longer when we can reliably detect timejumps */
4106 if (ecb_expect_true (timerfd != -1))
4107 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4108#endif
4109#if !EV_PERIODIC_ENABLE
4110 /* without periodics but with monotonic clock there is no need */
4111 /* for any time jump detection, so sleep longer */
4112 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4113#endif
4114 }
4115#endif
2627 4116
2628 if (timercnt) 4117 if (timercnt)
2629 { 4118 {
2630 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 4119 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2631 if (waittime > to) waittime = to; 4120 if (waittime > to) waittime = to;
… …
2638 if (waittime > to) waittime = to; 4127 if (waittime > to) waittime = to;
2639 } 4128 }
2640#endif 4129#endif
2641 4130
2642 /* don't let timeouts decrease the waittime below timeout_blocktime */ 4131 /* don't let timeouts decrease the waittime below timeout_blocktime */
2643 if (expect_false (waittime < timeout_blocktime)) 4132 if (ecb_expect_false (waittime < timeout_blocktime))
2644 waittime = timeout_blocktime; 4133 waittime = timeout_blocktime;
2645 4134
2646 /* at this point, we NEED to wait, so we have to ensure */ 4135 /* now there are two more special cases left, either we have
2647 /* to pass a minimum nonzero value to the backend */ 4136 * already-expired timers, so we should not sleep, or we have timers
4137 * that expire very soon, in which case we need to wait for a minimum
4138 * amount of time for some event loop backends.
4139 */
2648 if (expect_false (waittime < backend_mintime)) 4140 if (ecb_expect_false (waittime < backend_mintime))
4141 waittime = waittime <= EV_TS_CONST (0.)
4142 ? EV_TS_CONST (0.)
2649 waittime = backend_mintime; 4143 : backend_mintime;
2650 4144
2651 /* extra check because io_blocktime is commonly 0 */ 4145 /* extra check because io_blocktime is commonly 0 */
2652 if (expect_false (io_blocktime)) 4146 if (ecb_expect_false (io_blocktime))
2653 { 4147 {
2654 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4148 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2655 4149
2656 if (sleeptime > waittime - backend_mintime) 4150 if (sleeptime > waittime - backend_mintime)
2657 sleeptime = waittime - backend_mintime; 4151 sleeptime = waittime - backend_mintime;
2658 4152
2659 if (expect_true (sleeptime > 0.)) 4153 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2660 { 4154 {
2661 ev_sleep (sleeptime); 4155 ev_sleep (sleeptime);
2662 waittime -= sleeptime; 4156 waittime -= sleeptime;
2663 } 4157 }
2664 } 4158 }
… …
2669#endif 4163#endif
2670 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 4164 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2671 backend_poll (EV_A_ waittime); 4165 backend_poll (EV_A_ waittime);
2672 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 4166 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2673 4167
2674 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */ 4168 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2675 4169
4170 ECB_MEMORY_FENCE_ACQUIRE;
2676 if (pipe_write_skipped) 4171 if (pipe_write_skipped)
2677 { 4172 {
2678 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); 4173 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2679 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 4174 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2680 } 4175 }
2681 4176
2682
2683 /* update ev_rt_now, do magic */ 4177 /* update ev_rt_now, do magic */
2684 time_update (EV_A_ waittime + sleeptime); 4178 time_update (EV_A_ waittime + sleeptime);
2685 } 4179 }
2686 4180
2687 /* queue pending timers and reschedule them */ 4181 /* queue pending timers and reschedule them */
… …
2695 idle_reify (EV_A); 4189 idle_reify (EV_A);
2696#endif 4190#endif
2697 4191
2698#if EV_CHECK_ENABLE 4192#if EV_CHECK_ENABLE
2699 /* queue check watchers, to be executed first */ 4193 /* queue check watchers, to be executed first */
2700 if (expect_false (checkcnt)) 4194 if (ecb_expect_false (checkcnt))
2701 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4195 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2702#endif 4196#endif
2703 4197
2704 EV_INVOKE_PENDING; 4198 EV_INVOKE_PENDING;
2705 } 4199 }
2706 while (expect_true ( 4200 while (ecb_expect_true (
2707 activecnt 4201 activecnt
2708 && !loop_done 4202 && !loop_done
2709 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) 4203 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2710 )); 4204 ));
2711 4205
… …
2713 loop_done = EVBREAK_CANCEL; 4207 loop_done = EVBREAK_CANCEL;
2714 4208
2715#if EV_FEATURE_API 4209#if EV_FEATURE_API
2716 --loop_depth; 4210 --loop_depth;
2717#endif 4211#endif
4212
4213 return activecnt;
2718} 4214}
2719 4215
2720void 4216void
2721ev_break (EV_P_ int how) 4217ev_break (EV_P_ int how) EV_NOEXCEPT
2722{ 4218{
2723 loop_done = how; 4219 loop_done = how;
2724} 4220}
2725 4221
2726void 4222void
2727ev_ref (EV_P) 4223ev_ref (EV_P) EV_NOEXCEPT
2728{ 4224{
2729 ++activecnt; 4225 ++activecnt;
2730} 4226}
2731 4227
2732void 4228void
2733ev_unref (EV_P) 4229ev_unref (EV_P) EV_NOEXCEPT
2734{ 4230{
2735 --activecnt; 4231 --activecnt;
2736} 4232}
2737 4233
2738void 4234void
2739ev_now_update (EV_P) 4235ev_now_update (EV_P) EV_NOEXCEPT
2740{ 4236{
2741 time_update (EV_A_ 1e100); 4237 time_update (EV_A_ EV_TSTAMP_HUGE);
2742} 4238}
2743 4239
2744void 4240void
2745ev_suspend (EV_P) 4241ev_suspend (EV_P) EV_NOEXCEPT
2746{ 4242{
2747 ev_now_update (EV_A); 4243 ev_now_update (EV_A);
2748} 4244}
2749 4245
2750void 4246void
2751ev_resume (EV_P) 4247ev_resume (EV_P) EV_NOEXCEPT
2752{ 4248{
2753 ev_tstamp mn_prev = mn_now; 4249 ev_tstamp mn_prev = mn_now;
2754 4250
2755 ev_now_update (EV_A); 4251 ev_now_update (EV_A);
2756 timers_reschedule (EV_A_ mn_now - mn_prev); 4252 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2773inline_size void 4269inline_size void
2774wlist_del (WL *head, WL elem) 4270wlist_del (WL *head, WL elem)
2775{ 4271{
2776 while (*head) 4272 while (*head)
2777 { 4273 {
2778 if (expect_true (*head == elem)) 4274 if (ecb_expect_true (*head == elem))
2779 { 4275 {
2780 *head = elem->next; 4276 *head = elem->next;
2781 break; 4277 break;
2782 } 4278 }
2783 4279
… …
2795 w->pending = 0; 4291 w->pending = 0;
2796 } 4292 }
2797} 4293}
2798 4294
2799int 4295int
2800ev_clear_pending (EV_P_ void *w) 4296ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2801{ 4297{
2802 W w_ = (W)w; 4298 W w_ = (W)w;
2803 int pending = w_->pending; 4299 int pending = w_->pending;
2804 4300
2805 if (expect_true (pending)) 4301 if (ecb_expect_true (pending))
2806 { 4302 {
2807 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4303 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2808 p->w = (W)&pending_w; 4304 p->w = (W)&pending_w;
2809 w_->pending = 0; 4305 w_->pending = 0;
2810 return p->events; 4306 return p->events;
… …
2837 w->active = 0; 4333 w->active = 0;
2838} 4334}
2839 4335
2840/*****************************************************************************/ 4336/*****************************************************************************/
2841 4337
2842void noinline 4338ecb_noinline
4339void
2843ev_io_start (EV_P_ ev_io *w) 4340ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2844{ 4341{
2845 int fd = w->fd; 4342 int fd = w->fd;
2846 4343
2847 if (expect_false (ev_is_active (w))) 4344 if (ecb_expect_false (ev_is_active (w)))
2848 return; 4345 return;
2849 4346
2850 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4347 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2851 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4348 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2852 4349
4350#if EV_VERIFY >= 2
4351 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4352#endif
2853 EV_FREQUENT_CHECK; 4353 EV_FREQUENT_CHECK;
2854 4354
2855 ev_start (EV_A_ (W)w, 1); 4355 ev_start (EV_A_ (W)w, 1);
2856 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4356 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2857 wlist_add (&anfds[fd].head, (WL)w); 4357 wlist_add (&anfds[fd].head, (WL)w);
4358
4359 /* common bug, apparently */
4360 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2858 4361
2859 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4362 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2860 w->events &= ~EV__IOFDSET; 4363 w->events &= ~EV__IOFDSET;
2861 4364
2862 EV_FREQUENT_CHECK; 4365 EV_FREQUENT_CHECK;
2863} 4366}
2864 4367
2865void noinline 4368ecb_noinline
4369void
2866ev_io_stop (EV_P_ ev_io *w) 4370ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2867{ 4371{
2868 clear_pending (EV_A_ (W)w); 4372 clear_pending (EV_A_ (W)w);
2869 if (expect_false (!ev_is_active (w))) 4373 if (ecb_expect_false (!ev_is_active (w)))
2870 return; 4374 return;
2871 4375
2872 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4376 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2873 4377
4378#if EV_VERIFY >= 2
4379 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4380#endif
2874 EV_FREQUENT_CHECK; 4381 EV_FREQUENT_CHECK;
2875 4382
2876 wlist_del (&anfds[w->fd].head, (WL)w); 4383 wlist_del (&anfds[w->fd].head, (WL)w);
2877 ev_stop (EV_A_ (W)w); 4384 ev_stop (EV_A_ (W)w);
2878 4385
2879 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 4386 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2880 4387
2881 EV_FREQUENT_CHECK; 4388 EV_FREQUENT_CHECK;
2882} 4389}
2883 4390
2884void noinline 4391ecb_noinline
4392void
2885ev_timer_start (EV_P_ ev_timer *w) 4393ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2886{ 4394{
2887 if (expect_false (ev_is_active (w))) 4395 if (ecb_expect_false (ev_is_active (w)))
2888 return; 4396 return;
2889 4397
2890 ev_at (w) += mn_now; 4398 ev_at (w) += mn_now;
2891 4399
2892 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4400 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2893 4401
2894 EV_FREQUENT_CHECK; 4402 EV_FREQUENT_CHECK;
2895 4403
2896 ++timercnt; 4404 ++timercnt;
2897 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4405 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2898 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4406 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2899 ANHE_w (timers [ev_active (w)]) = (WT)w; 4407 ANHE_w (timers [ev_active (w)]) = (WT)w;
2900 ANHE_at_cache (timers [ev_active (w)]); 4408 ANHE_at_cache (timers [ev_active (w)]);
2901 upheap (timers, ev_active (w)); 4409 upheap (timers, ev_active (w));
2902 4410
2903 EV_FREQUENT_CHECK; 4411 EV_FREQUENT_CHECK;
2904 4412
2905 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4413 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2906} 4414}
2907 4415
2908void noinline 4416ecb_noinline
4417void
2909ev_timer_stop (EV_P_ ev_timer *w) 4418ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2910{ 4419{
2911 clear_pending (EV_A_ (W)w); 4420 clear_pending (EV_A_ (W)w);
2912 if (expect_false (!ev_is_active (w))) 4421 if (ecb_expect_false (!ev_is_active (w)))
2913 return; 4422 return;
2914 4423
2915 EV_FREQUENT_CHECK; 4424 EV_FREQUENT_CHECK;
2916 4425
2917 { 4426 {
… …
2919 4428
2920 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4429 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2921 4430
2922 --timercnt; 4431 --timercnt;
2923 4432
2924 if (expect_true (active < timercnt + HEAP0)) 4433 if (ecb_expect_true (active < timercnt + HEAP0))
2925 { 4434 {
2926 timers [active] = timers [timercnt + HEAP0]; 4435 timers [active] = timers [timercnt + HEAP0];
2927 adjustheap (timers, timercnt, active); 4436 adjustheap (timers, timercnt, active);
2928 } 4437 }
2929 } 4438 }
… …
2933 ev_stop (EV_A_ (W)w); 4442 ev_stop (EV_A_ (W)w);
2934 4443
2935 EV_FREQUENT_CHECK; 4444 EV_FREQUENT_CHECK;
2936} 4445}
2937 4446
2938void noinline 4447ecb_noinline
4448void
2939ev_timer_again (EV_P_ ev_timer *w) 4449ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2940{ 4450{
2941 EV_FREQUENT_CHECK; 4451 EV_FREQUENT_CHECK;
4452
4453 clear_pending (EV_A_ (W)w);
2942 4454
2943 if (ev_is_active (w)) 4455 if (ev_is_active (w))
2944 { 4456 {
2945 if (w->repeat) 4457 if (w->repeat)
2946 { 4458 {
… …
2959 4471
2960 EV_FREQUENT_CHECK; 4472 EV_FREQUENT_CHECK;
2961} 4473}
2962 4474
2963ev_tstamp 4475ev_tstamp
2964ev_timer_remaining (EV_P_ ev_timer *w) 4476ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2965{ 4477{
2966 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4478 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
2967} 4479}
2968 4480
2969#if EV_PERIODIC_ENABLE 4481#if EV_PERIODIC_ENABLE
2970void noinline 4482ecb_noinline
4483void
2971ev_periodic_start (EV_P_ ev_periodic *w) 4484ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2972{ 4485{
2973 if (expect_false (ev_is_active (w))) 4486 if (ecb_expect_false (ev_is_active (w)))
2974 return; 4487 return;
4488
4489#if EV_USE_TIMERFD
4490 if (timerfd == -2)
4491 evtimerfd_init (EV_A);
4492#endif
2975 4493
2976 if (w->reschedule_cb) 4494 if (w->reschedule_cb)
2977 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4495 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2978 else if (w->interval) 4496 else if (w->interval)
2979 { 4497 {
… …
2985 4503
2986 EV_FREQUENT_CHECK; 4504 EV_FREQUENT_CHECK;
2987 4505
2988 ++periodiccnt; 4506 ++periodiccnt;
2989 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4507 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2990 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4508 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2991 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4509 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2992 ANHE_at_cache (periodics [ev_active (w)]); 4510 ANHE_at_cache (periodics [ev_active (w)]);
2993 upheap (periodics, ev_active (w)); 4511 upheap (periodics, ev_active (w));
2994 4512
2995 EV_FREQUENT_CHECK; 4513 EV_FREQUENT_CHECK;
2996 4514
2997 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4515 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2998} 4516}
2999 4517
3000void noinline 4518ecb_noinline
4519void
3001ev_periodic_stop (EV_P_ ev_periodic *w) 4520ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
3002{ 4521{
3003 clear_pending (EV_A_ (W)w); 4522 clear_pending (EV_A_ (W)w);
3004 if (expect_false (!ev_is_active (w))) 4523 if (ecb_expect_false (!ev_is_active (w)))
3005 return; 4524 return;
3006 4525
3007 EV_FREQUENT_CHECK; 4526 EV_FREQUENT_CHECK;
3008 4527
3009 { 4528 {
… …
3011 4530
3012 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4531 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3013 4532
3014 --periodiccnt; 4533 --periodiccnt;
3015 4534
3016 if (expect_true (active < periodiccnt + HEAP0)) 4535 if (ecb_expect_true (active < periodiccnt + HEAP0))
3017 { 4536 {
3018 periodics [active] = periodics [periodiccnt + HEAP0]; 4537 periodics [active] = periodics [periodiccnt + HEAP0];
3019 adjustheap (periodics, periodiccnt, active); 4538 adjustheap (periodics, periodiccnt, active);
3020 } 4539 }
3021 } 4540 }
… …
3023 ev_stop (EV_A_ (W)w); 4542 ev_stop (EV_A_ (W)w);
3024 4543
3025 EV_FREQUENT_CHECK; 4544 EV_FREQUENT_CHECK;
3026} 4545}
3027 4546
3028void noinline 4547ecb_noinline
4548void
3029ev_periodic_again (EV_P_ ev_periodic *w) 4549ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
3030{ 4550{
3031 /* TODO: use adjustheap and recalculation */ 4551 /* TODO: use adjustheap and recalculation */
3032 ev_periodic_stop (EV_A_ w); 4552 ev_periodic_stop (EV_A_ w);
3033 ev_periodic_start (EV_A_ w); 4553 ev_periodic_start (EV_A_ w);
3034} 4554}
… …
3038# define SA_RESTART 0 4558# define SA_RESTART 0
3039#endif 4559#endif
3040 4560
3041#if EV_SIGNAL_ENABLE 4561#if EV_SIGNAL_ENABLE
3042 4562
3043void noinline 4563ecb_noinline
4564void
3044ev_signal_start (EV_P_ ev_signal *w) 4565ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
3045{ 4566{
3046 if (expect_false (ev_is_active (w))) 4567 if (ecb_expect_false (ev_is_active (w)))
3047 return; 4568 return;
3048 4569
3049 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4570 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3050 4571
3051#if EV_MULTIPLICITY 4572#if EV_MULTIPLICITY
3052 assert (("libev: a signal must not be attached to two different loops", 4573 assert (("libev: a signal must not be attached to two different loops",
3053 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4574 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3054 4575
3055 signals [w->signum - 1].loop = EV_A; 4576 signals [w->signum - 1].loop = EV_A;
4577 ECB_MEMORY_FENCE_RELEASE;
3056#endif 4578#endif
3057 4579
3058 EV_FREQUENT_CHECK; 4580 EV_FREQUENT_CHECK;
3059 4581
3060#if EV_USE_SIGNALFD 4582#if EV_USE_SIGNALFD
… …
3119 } 4641 }
3120 4642
3121 EV_FREQUENT_CHECK; 4643 EV_FREQUENT_CHECK;
3122} 4644}
3123 4645
3124void noinline 4646ecb_noinline
4647void
3125ev_signal_stop (EV_P_ ev_signal *w) 4648ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
3126{ 4649{
3127 clear_pending (EV_A_ (W)w); 4650 clear_pending (EV_A_ (W)w);
3128 if (expect_false (!ev_is_active (w))) 4651 if (ecb_expect_false (!ev_is_active (w)))
3129 return; 4652 return;
3130 4653
3131 EV_FREQUENT_CHECK; 4654 EV_FREQUENT_CHECK;
3132 4655
3133 wlist_del (&signals [w->signum - 1].head, (WL)w); 4656 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
3161#endif 4684#endif
3162 4685
3163#if EV_CHILD_ENABLE 4686#if EV_CHILD_ENABLE
3164 4687
3165void 4688void
3166ev_child_start (EV_P_ ev_child *w) 4689ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
3167{ 4690{
3168#if EV_MULTIPLICITY 4691#if EV_MULTIPLICITY
3169 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4692 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3170#endif 4693#endif
3171 if (expect_false (ev_is_active (w))) 4694 if (ecb_expect_false (ev_is_active (w)))
3172 return; 4695 return;
3173 4696
3174 EV_FREQUENT_CHECK; 4697 EV_FREQUENT_CHECK;
3175 4698
3176 ev_start (EV_A_ (W)w, 1); 4699 ev_start (EV_A_ (W)w, 1);
… …
3178 4701
3179 EV_FREQUENT_CHECK; 4702 EV_FREQUENT_CHECK;
3180} 4703}
3181 4704
3182void 4705void
3183ev_child_stop (EV_P_ ev_child *w) 4706ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
3184{ 4707{
3185 clear_pending (EV_A_ (W)w); 4708 clear_pending (EV_A_ (W)w);
3186 if (expect_false (!ev_is_active (w))) 4709 if (ecb_expect_false (!ev_is_active (w)))
3187 return; 4710 return;
3188 4711
3189 EV_FREQUENT_CHECK; 4712 EV_FREQUENT_CHECK;
3190 4713
3191 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); 4714 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
… …
3205 4728
3206#define DEF_STAT_INTERVAL 5.0074891 4729#define DEF_STAT_INTERVAL 5.0074891
3207#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4730#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3208#define MIN_STAT_INTERVAL 0.1074891 4731#define MIN_STAT_INTERVAL 0.1074891
3209 4732
3210static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4733ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3211 4734
3212#if EV_USE_INOTIFY 4735#if EV_USE_INOTIFY
3213 4736
3214/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4737/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3215# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4738# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3216 4739
3217static void noinline 4740ecb_noinline
4741static void
3218infy_add (EV_P_ ev_stat *w) 4742infy_add (EV_P_ ev_stat *w)
3219{ 4743{
3220 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4744 w->wd = inotify_add_watch (fs_fd, w->path,
4745 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4746 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4747 | IN_DONT_FOLLOW | IN_MASK_ADD);
3221 4748
3222 if (w->wd >= 0) 4749 if (w->wd >= 0)
3223 { 4750 {
3224 struct statfs sfs; 4751 struct statfs sfs;
3225 4752
… …
3229 4756
3230 if (!fs_2625) 4757 if (!fs_2625)
3231 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4758 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3232 else if (!statfs (w->path, &sfs) 4759 else if (!statfs (w->path, &sfs)
3233 && (sfs.f_type == 0x1373 /* devfs */ 4760 && (sfs.f_type == 0x1373 /* devfs */
4761 || sfs.f_type == 0x4006 /* fat */
4762 || sfs.f_type == 0x4d44 /* msdos */
3234 || sfs.f_type == 0xEF53 /* ext2/3 */ 4763 || sfs.f_type == 0xEF53 /* ext2/3 */
4764 || sfs.f_type == 0x72b6 /* jffs2 */
4765 || sfs.f_type == 0x858458f6 /* ramfs */
4766 || sfs.f_type == 0x5346544e /* ntfs */
3235 || sfs.f_type == 0x3153464a /* jfs */ 4767 || sfs.f_type == 0x3153464a /* jfs */
4768 || sfs.f_type == 0x9123683e /* btrfs */
3236 || sfs.f_type == 0x52654973 /* reiser3 */ 4769 || sfs.f_type == 0x52654973 /* reiser3 */
3237 || sfs.f_type == 0x01021994 /* tempfs */ 4770 || sfs.f_type == 0x01021994 /* tmpfs */
3238 || sfs.f_type == 0x58465342 /* xfs */)) 4771 || sfs.f_type == 0x58465342 /* xfs */))
3239 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4772 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3240 else 4773 else
3241 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4774 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3242 } 4775 }
… …
3277 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4810 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3278 ev_timer_again (EV_A_ &w->timer); 4811 ev_timer_again (EV_A_ &w->timer);
3279 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4812 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3280} 4813}
3281 4814
3282static void noinline 4815ecb_noinline
4816static void
3283infy_del (EV_P_ ev_stat *w) 4817infy_del (EV_P_ ev_stat *w)
3284{ 4818{
3285 int slot; 4819 int slot;
3286 int wd = w->wd; 4820 int wd = w->wd;
3287 4821
… …
3294 4828
3295 /* remove this watcher, if others are watching it, they will rearm */ 4829 /* remove this watcher, if others are watching it, they will rearm */
3296 inotify_rm_watch (fs_fd, wd); 4830 inotify_rm_watch (fs_fd, wd);
3297} 4831}
3298 4832
3299static void noinline 4833ecb_noinline
4834static void
3300infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4835infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3301{ 4836{
3302 if (slot < 0) 4837 if (slot < 0)
3303 /* overflow, need to check for all hash slots */ 4838 /* overflow, need to check for all hash slots */
3304 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4839 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3340 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4875 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3341 ofs += sizeof (struct inotify_event) + ev->len; 4876 ofs += sizeof (struct inotify_event) + ev->len;
3342 } 4877 }
3343} 4878}
3344 4879
3345inline_size void ecb_cold 4880inline_size ecb_cold
4881void
3346ev_check_2625 (EV_P) 4882ev_check_2625 (EV_P)
3347{ 4883{
3348 /* kernels < 2.6.25 are borked 4884 /* kernels < 2.6.25 are borked
3349 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4885 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3350 */ 4886 */
… …
3355} 4891}
3356 4892
3357inline_size int 4893inline_size int
3358infy_newfd (void) 4894infy_newfd (void)
3359{ 4895{
3360#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4896#if defined IN_CLOEXEC && defined IN_NONBLOCK
3361 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4897 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3362 if (fd >= 0) 4898 if (fd >= 0)
3363 return fd; 4899 return fd;
3364#endif 4900#endif
3365 return inotify_init (); 4901 return inotify_init ();
… …
3440#else 4976#else
3441# define EV_LSTAT(p,b) lstat (p, b) 4977# define EV_LSTAT(p,b) lstat (p, b)
3442#endif 4978#endif
3443 4979
3444void 4980void
3445ev_stat_stat (EV_P_ ev_stat *w) 4981ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3446{ 4982{
3447 if (lstat (w->path, &w->attr) < 0) 4983 if (lstat (w->path, &w->attr) < 0)
3448 w->attr.st_nlink = 0; 4984 w->attr.st_nlink = 0;
3449 else if (!w->attr.st_nlink) 4985 else if (!w->attr.st_nlink)
3450 w->attr.st_nlink = 1; 4986 w->attr.st_nlink = 1;
3451} 4987}
3452 4988
3453static void noinline 4989ecb_noinline
4990static void
3454stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4991stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3455{ 4992{
3456 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4993 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3457 4994
3458 ev_statdata prev = w->attr; 4995 ev_statdata prev = w->attr;
… …
3489 ev_feed_event (EV_A_ w, EV_STAT); 5026 ev_feed_event (EV_A_ w, EV_STAT);
3490 } 5027 }
3491} 5028}
3492 5029
3493void 5030void
3494ev_stat_start (EV_P_ ev_stat *w) 5031ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3495{ 5032{
3496 if (expect_false (ev_is_active (w))) 5033 if (ecb_expect_false (ev_is_active (w)))
3497 return; 5034 return;
3498 5035
3499 ev_stat_stat (EV_A_ w); 5036 ev_stat_stat (EV_A_ w);
3500 5037
3501 if (w->interval < MIN_STAT_INTERVAL && w->interval) 5038 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3520 5057
3521 EV_FREQUENT_CHECK; 5058 EV_FREQUENT_CHECK;
3522} 5059}
3523 5060
3524void 5061void
3525ev_stat_stop (EV_P_ ev_stat *w) 5062ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3526{ 5063{
3527 clear_pending (EV_A_ (W)w); 5064 clear_pending (EV_A_ (W)w);
3528 if (expect_false (!ev_is_active (w))) 5065 if (ecb_expect_false (!ev_is_active (w)))
3529 return; 5066 return;
3530 5067
3531 EV_FREQUENT_CHECK; 5068 EV_FREQUENT_CHECK;
3532 5069
3533#if EV_USE_INOTIFY 5070#if EV_USE_INOTIFY
… …
3546} 5083}
3547#endif 5084#endif
3548 5085
3549#if EV_IDLE_ENABLE 5086#if EV_IDLE_ENABLE
3550void 5087void
3551ev_idle_start (EV_P_ ev_idle *w) 5088ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3552{ 5089{
3553 if (expect_false (ev_is_active (w))) 5090 if (ecb_expect_false (ev_is_active (w)))
3554 return; 5091 return;
3555 5092
3556 pri_adjust (EV_A_ (W)w); 5093 pri_adjust (EV_A_ (W)w);
3557 5094
3558 EV_FREQUENT_CHECK; 5095 EV_FREQUENT_CHECK;
… …
3561 int active = ++idlecnt [ABSPRI (w)]; 5098 int active = ++idlecnt [ABSPRI (w)];
3562 5099
3563 ++idleall; 5100 ++idleall;
3564 ev_start (EV_A_ (W)w, active); 5101 ev_start (EV_A_ (W)w, active);
3565 5102
3566 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 5103 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3567 idles [ABSPRI (w)][active - 1] = w; 5104 idles [ABSPRI (w)][active - 1] = w;
3568 } 5105 }
3569 5106
3570 EV_FREQUENT_CHECK; 5107 EV_FREQUENT_CHECK;
3571} 5108}
3572 5109
3573void 5110void
3574ev_idle_stop (EV_P_ ev_idle *w) 5111ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3575{ 5112{
3576 clear_pending (EV_A_ (W)w); 5113 clear_pending (EV_A_ (W)w);
3577 if (expect_false (!ev_is_active (w))) 5114 if (ecb_expect_false (!ev_is_active (w)))
3578 return; 5115 return;
3579 5116
3580 EV_FREQUENT_CHECK; 5117 EV_FREQUENT_CHECK;
3581 5118
3582 { 5119 {
… …
3593} 5130}
3594#endif 5131#endif
3595 5132
3596#if EV_PREPARE_ENABLE 5133#if EV_PREPARE_ENABLE
3597void 5134void
3598ev_prepare_start (EV_P_ ev_prepare *w) 5135ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3599{ 5136{
3600 if (expect_false (ev_is_active (w))) 5137 if (ecb_expect_false (ev_is_active (w)))
3601 return; 5138 return;
3602 5139
3603 EV_FREQUENT_CHECK; 5140 EV_FREQUENT_CHECK;
3604 5141
3605 ev_start (EV_A_ (W)w, ++preparecnt); 5142 ev_start (EV_A_ (W)w, ++preparecnt);
3606 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 5143 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3607 prepares [preparecnt - 1] = w; 5144 prepares [preparecnt - 1] = w;
3608 5145
3609 EV_FREQUENT_CHECK; 5146 EV_FREQUENT_CHECK;
3610} 5147}
3611 5148
3612void 5149void
3613ev_prepare_stop (EV_P_ ev_prepare *w) 5150ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3614{ 5151{
3615 clear_pending (EV_A_ (W)w); 5152 clear_pending (EV_A_ (W)w);
3616 if (expect_false (!ev_is_active (w))) 5153 if (ecb_expect_false (!ev_is_active (w)))
3617 return; 5154 return;
3618 5155
3619 EV_FREQUENT_CHECK; 5156 EV_FREQUENT_CHECK;
3620 5157
3621 { 5158 {
… …
3631} 5168}
3632#endif 5169#endif
3633 5170
3634#if EV_CHECK_ENABLE 5171#if EV_CHECK_ENABLE
3635void 5172void
3636ev_check_start (EV_P_ ev_check *w) 5173ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3637{ 5174{
3638 if (expect_false (ev_is_active (w))) 5175 if (ecb_expect_false (ev_is_active (w)))
3639 return; 5176 return;
3640 5177
3641 EV_FREQUENT_CHECK; 5178 EV_FREQUENT_CHECK;
3642 5179
3643 ev_start (EV_A_ (W)w, ++checkcnt); 5180 ev_start (EV_A_ (W)w, ++checkcnt);
3644 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5181 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3645 checks [checkcnt - 1] = w; 5182 checks [checkcnt - 1] = w;
3646 5183
3647 EV_FREQUENT_CHECK; 5184 EV_FREQUENT_CHECK;
3648} 5185}
3649 5186
3650void 5187void
3651ev_check_stop (EV_P_ ev_check *w) 5188ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3652{ 5189{
3653 clear_pending (EV_A_ (W)w); 5190 clear_pending (EV_A_ (W)w);
3654 if (expect_false (!ev_is_active (w))) 5191 if (ecb_expect_false (!ev_is_active (w)))
3655 return; 5192 return;
3656 5193
3657 EV_FREQUENT_CHECK; 5194 EV_FREQUENT_CHECK;
3658 5195
3659 { 5196 {
… …
3668 EV_FREQUENT_CHECK; 5205 EV_FREQUENT_CHECK;
3669} 5206}
3670#endif 5207#endif
3671 5208
3672#if EV_EMBED_ENABLE 5209#if EV_EMBED_ENABLE
3673void noinline 5210ecb_noinline
5211void
3674ev_embed_sweep (EV_P_ ev_embed *w) 5212ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3675{ 5213{
3676 ev_run (w->other, EVRUN_NOWAIT); 5214 ev_run (w->other, EVRUN_NOWAIT);
3677} 5215}
3678 5216
3679static void 5217static void
… …
3701 ev_run (EV_A_ EVRUN_NOWAIT); 5239 ev_run (EV_A_ EVRUN_NOWAIT);
3702 } 5240 }
3703 } 5241 }
3704} 5242}
3705 5243
5244#if EV_FORK_ENABLE
3706static void 5245static void
3707embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5246embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3708{ 5247{
3709 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 5248 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3710 5249
… …
3717 ev_run (EV_A_ EVRUN_NOWAIT); 5256 ev_run (EV_A_ EVRUN_NOWAIT);
3718 } 5257 }
3719 5258
3720 ev_embed_start (EV_A_ w); 5259 ev_embed_start (EV_A_ w);
3721} 5260}
5261#endif
3722 5262
3723#if 0 5263#if 0
3724static void 5264static void
3725embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5265embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3726{ 5266{
3727 ev_idle_stop (EV_A_ idle); 5267 ev_idle_stop (EV_A_ idle);
3728} 5268}
3729#endif 5269#endif
3730 5270
3731void 5271void
3732ev_embed_start (EV_P_ ev_embed *w) 5272ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3733{ 5273{
3734 if (expect_false (ev_is_active (w))) 5274 if (ecb_expect_false (ev_is_active (w)))
3735 return; 5275 return;
3736 5276
3737 { 5277 {
3738 EV_P = w->other; 5278 EV_P = w->other;
3739 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 5279 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
… …
3747 5287
3748 ev_prepare_init (&w->prepare, embed_prepare_cb); 5288 ev_prepare_init (&w->prepare, embed_prepare_cb);
3749 ev_set_priority (&w->prepare, EV_MINPRI); 5289 ev_set_priority (&w->prepare, EV_MINPRI);
3750 ev_prepare_start (EV_A_ &w->prepare); 5290 ev_prepare_start (EV_A_ &w->prepare);
3751 5291
5292#if EV_FORK_ENABLE
3752 ev_fork_init (&w->fork, embed_fork_cb); 5293 ev_fork_init (&w->fork, embed_fork_cb);
3753 ev_fork_start (EV_A_ &w->fork); 5294 ev_fork_start (EV_A_ &w->fork);
5295#endif
3754 5296
3755 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5297 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3756 5298
3757 ev_start (EV_A_ (W)w, 1); 5299 ev_start (EV_A_ (W)w, 1);
3758 5300
3759 EV_FREQUENT_CHECK; 5301 EV_FREQUENT_CHECK;
3760} 5302}
3761 5303
3762void 5304void
3763ev_embed_stop (EV_P_ ev_embed *w) 5305ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3764{ 5306{
3765 clear_pending (EV_A_ (W)w); 5307 clear_pending (EV_A_ (W)w);
3766 if (expect_false (!ev_is_active (w))) 5308 if (ecb_expect_false (!ev_is_active (w)))
3767 return; 5309 return;
3768 5310
3769 EV_FREQUENT_CHECK; 5311 EV_FREQUENT_CHECK;
3770 5312
3771 ev_io_stop (EV_A_ &w->io); 5313 ev_io_stop (EV_A_ &w->io);
3772 ev_prepare_stop (EV_A_ &w->prepare); 5314 ev_prepare_stop (EV_A_ &w->prepare);
5315#if EV_FORK_ENABLE
3773 ev_fork_stop (EV_A_ &w->fork); 5316 ev_fork_stop (EV_A_ &w->fork);
5317#endif
3774 5318
3775 ev_stop (EV_A_ (W)w); 5319 ev_stop (EV_A_ (W)w);
3776 5320
3777 EV_FREQUENT_CHECK; 5321 EV_FREQUENT_CHECK;
3778} 5322}
3779#endif 5323#endif
3780 5324
3781#if EV_FORK_ENABLE 5325#if EV_FORK_ENABLE
3782void 5326void
3783ev_fork_start (EV_P_ ev_fork *w) 5327ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3784{ 5328{
3785 if (expect_false (ev_is_active (w))) 5329 if (ecb_expect_false (ev_is_active (w)))
3786 return; 5330 return;
3787 5331
3788 EV_FREQUENT_CHECK; 5332 EV_FREQUENT_CHECK;
3789 5333
3790 ev_start (EV_A_ (W)w, ++forkcnt); 5334 ev_start (EV_A_ (W)w, ++forkcnt);
3791 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5335 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3792 forks [forkcnt - 1] = w; 5336 forks [forkcnt - 1] = w;
3793 5337
3794 EV_FREQUENT_CHECK; 5338 EV_FREQUENT_CHECK;
3795} 5339}
3796 5340
3797void 5341void
3798ev_fork_stop (EV_P_ ev_fork *w) 5342ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3799{ 5343{
3800 clear_pending (EV_A_ (W)w); 5344 clear_pending (EV_A_ (W)w);
3801 if (expect_false (!ev_is_active (w))) 5345 if (ecb_expect_false (!ev_is_active (w)))
3802 return; 5346 return;
3803 5347
3804 EV_FREQUENT_CHECK; 5348 EV_FREQUENT_CHECK;
3805 5349
3806 { 5350 {
… …
3816} 5360}
3817#endif 5361#endif
3818 5362
3819#if EV_CLEANUP_ENABLE 5363#if EV_CLEANUP_ENABLE
3820void 5364void
3821ev_cleanup_start (EV_P_ ev_cleanup *w) 5365ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3822{ 5366{
3823 if (expect_false (ev_is_active (w))) 5367 if (ecb_expect_false (ev_is_active (w)))
3824 return; 5368 return;
3825 5369
3826 EV_FREQUENT_CHECK; 5370 EV_FREQUENT_CHECK;
3827 5371
3828 ev_start (EV_A_ (W)w, ++cleanupcnt); 5372 ev_start (EV_A_ (W)w, ++cleanupcnt);
3829 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); 5373 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3830 cleanups [cleanupcnt - 1] = w; 5374 cleanups [cleanupcnt - 1] = w;
3831 5375
3832 /* cleanup watchers should never keep a refcount on the loop */ 5376 /* cleanup watchers should never keep a refcount on the loop */
3833 ev_unref (EV_A); 5377 ev_unref (EV_A);
3834 EV_FREQUENT_CHECK; 5378 EV_FREQUENT_CHECK;
3835} 5379}
3836 5380
3837void 5381void
3838ev_cleanup_stop (EV_P_ ev_cleanup *w) 5382ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3839{ 5383{
3840 clear_pending (EV_A_ (W)w); 5384 clear_pending (EV_A_ (W)w);
3841 if (expect_false (!ev_is_active (w))) 5385 if (ecb_expect_false (!ev_is_active (w)))
3842 return; 5386 return;
3843 5387
3844 EV_FREQUENT_CHECK; 5388 EV_FREQUENT_CHECK;
3845 ev_ref (EV_A); 5389 ev_ref (EV_A);
3846 5390
… …
3857} 5401}
3858#endif 5402#endif
3859 5403
3860#if EV_ASYNC_ENABLE 5404#if EV_ASYNC_ENABLE
3861void 5405void
3862ev_async_start (EV_P_ ev_async *w) 5406ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3863{ 5407{
3864 if (expect_false (ev_is_active (w))) 5408 if (ecb_expect_false (ev_is_active (w)))
3865 return; 5409 return;
3866 5410
3867 w->sent = 0; 5411 w->sent = 0;
3868 5412
3869 evpipe_init (EV_A); 5413 evpipe_init (EV_A);
3870 5414
3871 EV_FREQUENT_CHECK; 5415 EV_FREQUENT_CHECK;
3872 5416
3873 ev_start (EV_A_ (W)w, ++asynccnt); 5417 ev_start (EV_A_ (W)w, ++asynccnt);
3874 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5418 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3875 asyncs [asynccnt - 1] = w; 5419 asyncs [asynccnt - 1] = w;
3876 5420
3877 EV_FREQUENT_CHECK; 5421 EV_FREQUENT_CHECK;
3878} 5422}
3879 5423
3880void 5424void
3881ev_async_stop (EV_P_ ev_async *w) 5425ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3882{ 5426{
3883 clear_pending (EV_A_ (W)w); 5427 clear_pending (EV_A_ (W)w);
3884 if (expect_false (!ev_is_active (w))) 5428 if (ecb_expect_false (!ev_is_active (w)))
3885 return; 5429 return;
3886 5430
3887 EV_FREQUENT_CHECK; 5431 EV_FREQUENT_CHECK;
3888 5432
3889 { 5433 {
… …
3897 5441
3898 EV_FREQUENT_CHECK; 5442 EV_FREQUENT_CHECK;
3899} 5443}
3900 5444
3901void 5445void
3902ev_async_send (EV_P_ ev_async *w) 5446ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3903{ 5447{
3904 w->sent = 1; 5448 w->sent = 1;
3905 evpipe_write (EV_A_ &async_pending); 5449 evpipe_write (EV_A_ &async_pending);
3906} 5450}
3907#endif 5451#endif
… …
3944 5488
3945 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5489 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3946} 5490}
3947 5491
3948void 5492void
3949ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5493ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3950{ 5494{
3951 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5495 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3952
3953 if (expect_false (!once))
3954 {
3955 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3956 return;
3957 }
3958 5496
3959 once->cb = cb; 5497 once->cb = cb;
3960 once->arg = arg; 5498 once->arg = arg;
3961 5499
3962 ev_init (&once->io, once_cb_io); 5500 ev_init (&once->io, once_cb_io);
… …
3975} 5513}
3976 5514
3977/*****************************************************************************/ 5515/*****************************************************************************/
3978 5516
3979#if EV_WALK_ENABLE 5517#if EV_WALK_ENABLE
3980void ecb_cold 5518ecb_cold
5519void
3981ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5520ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3982{ 5521{
3983 int i, j; 5522 int i, j;
3984 ev_watcher_list *wl, *wn; 5523 ev_watcher_list *wl, *wn;
3985 5524
3986 if (types & (EV_IO | EV_EMBED)) 5525 if (types & (EV_IO | EV_EMBED))
… …
4029 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5568 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4030#endif 5569#endif
4031 5570
4032#if EV_IDLE_ENABLE 5571#if EV_IDLE_ENABLE
4033 if (types & EV_IDLE) 5572 if (types & EV_IDLE)
4034 for (j = NUMPRI; i--; ) 5573 for (j = NUMPRI; j--; )
4035 for (i = idlecnt [j]; i--; ) 5574 for (i = idlecnt [j]; i--; )
4036 cb (EV_A_ EV_IDLE, idles [j][i]); 5575 cb (EV_A_ EV_IDLE, idles [j][i]);
4037#endif 5576#endif
4038 5577
4039#if EV_FORK_ENABLE 5578#if EV_FORK_ENABLE
… …
4092 5631
4093#if EV_MULTIPLICITY 5632#if EV_MULTIPLICITY
4094 #include "ev_wrap.h" 5633 #include "ev_wrap.h"
4095#endif 5634#endif
4096 5635
4097EV_CPP(})
4098

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