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Comparing libev/ev.c (file contents):
Revision 1.377 by root, Wed Jun 8 13:11:55 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
608/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
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;
469#if __GNUC__ >= 4 671 #if __GNUC__
470# define expect(expr,value) __builtin_expect ((expr),(value)) 672 typedef signed long long int64_t;
471# define noinline __attribute__ ((noinline)) 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
472#else 689#else
473# define expect(expr,value) (expr) 690 #include <inttypes.h>
474# define noinline 691 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
475# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 692 #define ECB_PTRSIZE 8
476# define inline 693 #else
694 #define ECB_PTRSIZE 4
695 #endif
477# 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
478#endif 706 #endif
707#endif
479 708
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
717
718/* many compilers define _GNUC_ to some versions but then only implement
719 * what their idiot authors think are the "more important" extensions,
720 * causing enormous grief in return for some better fake benchmark numbers.
721 * or so.
722 * we try to detect these and simply assume they are not gcc - if they have
723 * an issue with that they should have done it right in the first place.
724 */
725#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
726 #define ECB_GCC_VERSION(major,minor) 0
727#else
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
847 #endif
848#endif
849
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
936 #define ecb_inline static inline
937#elif ECB_GCC_VERSION(2,5)
938 #define ecb_inline static __inline__
939#elif ECB_C99
940 #define ecb_inline static inline
941#else
942 #define ecb_inline static
943#endif
944
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)
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)
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)
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)
986 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
987#else
988 #define ecb_prefetch(addr,rw,locality)
989#endif
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
1017 #define ecb_noinline ecb_attribute ((__noinline__))
1018#endif
1019
1020#define ecb_unused ecb_attribute ((__unused__))
1021#define ecb_const ecb_attribute ((__const__))
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
1035
1036#if ECB_GCC_VERSION(4,3)
1037 #define ecb_artificial ecb_attribute ((__artificial__))
1038 #define ecb_hot ecb_attribute ((__hot__))
1039 #define ecb_cold ecb_attribute ((__cold__))
1040#else
1041 #define ecb_artificial
1042 #define ecb_hot
1043 #define ecb_cold
1044#endif
1045
1046/* put around conditional expressions if you are very sure that the */
1047/* expression is mostly true or mostly false. note that these return */
1048/* booleans, not the expression. */
480#define expect_false(expr) expect ((expr) != 0, 0) 1049#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
481#define expect_true(expr) expect ((expr) != 0, 1) 1050#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
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)
1054
1055/* count trailing zero bits and count # of one bits */
1056#if ECB_GCC_VERSION(3,4) \
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
1773
482#define inline_size static inline 1774#define inline_size ecb_inline
483 1775
484#if EV_FEATURE_CODE 1776#if EV_FEATURE_CODE
485# define inline_speed static inline 1777# define inline_speed ecb_inline
486#else 1778#else
487# define inline_speed static noinline 1779# define inline_speed ecb_noinline static
488#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/*****************************************************************************/
489 1847
490#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1848#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
491 1849
492#if EV_MINPRI == EV_MAXPRI 1850#if EV_MINPRI == EV_MAXPRI
493# define ABSPRI(w) (((W)w), 0) 1851# define ABSPRI(w) (((W)w), 0)
494#else 1852#else
495# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1853# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
496#endif 1854#endif
497 1855
498#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1856#define EMPTY /* required for microsofts broken pseudo-c compiler */
499#define EMPTY2(a,b) /* used to suppress some warnings */
500 1857
501typedef ev_watcher *W; 1858typedef ev_watcher *W;
502typedef ev_watcher_list *WL; 1859typedef ev_watcher_list *WL;
503typedef ev_watcher_time *WT; 1860typedef ev_watcher_time *WT;
504 1861
… …
529# include "ev_win32.c" 1886# include "ev_win32.c"
530#endif 1887#endif
531 1888
532/*****************************************************************************/ 1889/*****************************************************************************/
533 1890
1891#if EV_USE_LINUXAIO
1892# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1893#endif
1894
534/* define a suitable floor function (only used by periodics atm) */ 1895/* define a suitable floor function (only used by periodics atm) */
535 1896
536#if EV_USE_FLOOR 1897#if EV_USE_FLOOR
537# include <math.h> 1898# include <math.h>
538# define ev_floor(v) floor (v) 1899# define ev_floor(v) floor (v)
539#else 1900#else
540 1901
541#include <float.h> 1902#include <float.h>
542 1903
543/* 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
544static ev_tstamp noinline 1906static ev_tstamp
545ev_floor (ev_tstamp v) 1907ev_floor (ev_tstamp v)
546{ 1908{
547 /* the choice of shift factor is not terribly important */ 1909 /* the choice of shift factor is not terribly important */
548#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ 1910#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
549 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1911 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
550#else 1912#else
551 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; 1913 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
552#endif 1914#endif
553 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
554 /* argument too large for an unsigned long? */ 1924 /* argument too large for an unsigned long? then reduce it */
555 if (expect_false (v >= shift)) 1925 if (ecb_expect_false (v >= shift))
556 { 1926 {
557 ev_tstamp f; 1927 ev_tstamp f;
558 1928
559 if (v == v - 1.) 1929 if (v == v - 1.)
560 return v; /* very large number */ 1930 return v; /* very large numbers are assumed to be integer */
561 1931
562 f = shift * ev_floor (v * (1. / shift)); 1932 f = shift * ev_floor (v * (1. / shift));
563 return f + ev_floor (v - f); 1933 return f + ev_floor (v - f);
564 } 1934 }
565 1935
566 /* special treatment for negative args? */
567 if (expect_false (v < 0.))
568 {
569 ev_tstamp f = -ev_floor (-v);
570
571 return f - (f == v ? 0 : 1);
572 }
573
574 /* fits into an unsigned long */ 1936 /* fits into an unsigned long */
575 return (unsigned long)v; 1937 return (unsigned long)v;
576} 1938}
577 1939
578#endif 1940#endif
… …
581 1943
582#ifdef __linux 1944#ifdef __linux
583# include <sys/utsname.h> 1945# include <sys/utsname.h>
584#endif 1946#endif
585 1947
1948ecb_noinline ecb_cold
586static unsigned int noinline 1949static unsigned int
587ev_linux_version (void) 1950ev_linux_version (void)
588{ 1951{
589#ifdef __linux 1952#ifdef __linux
590 unsigned int v = 0; 1953 unsigned int v = 0;
591 struct utsname buf; 1954 struct utsname buf;
… …
620} 1983}
621 1984
622/*****************************************************************************/ 1985/*****************************************************************************/
623 1986
624#if EV_AVOID_STDIO 1987#if EV_AVOID_STDIO
625static void noinline 1988ecb_noinline ecb_cold
1989static void
626ev_printerr (const char *msg) 1990ev_printerr (const char *msg)
627{ 1991{
628 write (STDERR_FILENO, msg, strlen (msg)); 1992 write (STDERR_FILENO, msg, strlen (msg));
629} 1993}
630#endif 1994#endif
631 1995
632static void (*syserr_cb)(const char *msg); 1996static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
633 1997
1998ecb_cold
634void 1999void
635ev_set_syserr_cb (void (*cb)(const char *msg)) 2000ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
636{ 2001{
637 syserr_cb = cb; 2002 syserr_cb = cb;
638} 2003}
639 2004
640static void noinline 2005ecb_noinline ecb_cold
2006static void
641ev_syserr (const char *msg) 2007ev_syserr (const char *msg)
642{ 2008{
643 if (!msg) 2009 if (!msg)
644 msg = "(libev) system error"; 2010 msg = "(libev) system error";
645 2011
… …
658 abort (); 2024 abort ();
659 } 2025 }
660} 2026}
661 2027
662static void * 2028static void *
663ev_realloc_emul (void *ptr, long size) 2029ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
664{ 2030{
665#if __GLIBC__
666 return realloc (ptr, size);
667#else
668 /* some systems, notably openbsd and darwin, fail to properly 2031 /* some systems, notably openbsd and darwin, fail to properly
669 * 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
670 * 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.
671 */ 2036 */
672 2037
673 if (size) 2038 if (size)
674 return realloc (ptr, size); 2039 return realloc (ptr, size);
675 2040
676 free (ptr); 2041 free (ptr);
677 return 0; 2042 return 0;
678#endif
679} 2043}
680 2044
681static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 2045static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
682 2046
2047ecb_cold
683void 2048void
684ev_set_allocator (void *(*cb)(void *ptr, long size)) 2049ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
685{ 2050{
686 alloc = cb; 2051 alloc = cb;
687} 2052}
688 2053
689inline_speed void * 2054inline_speed void *
… …
716typedef struct 2081typedef struct
717{ 2082{
718 WL head; 2083 WL head;
719 unsigned char events; /* the events watched for */ 2084 unsigned char events; /* the events watched for */
720 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) */
721 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 */
722 unsigned char unused; 2087 unsigned char eflags; /* flags field for use by backends */
723#if EV_USE_EPOLL 2088#if EV_USE_EPOLL
724 unsigned int egen; /* generation counter to counter epoll bugs */ 2089 unsigned int egen; /* generation counter to counter epoll bugs */
725#endif 2090#endif
726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2091#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
727 SOCKET handle; 2092 SOCKET handle;
… …
777 #undef VAR 2142 #undef VAR
778 }; 2143 };
779 #include "ev_wrap.h" 2144 #include "ev_wrap.h"
780 2145
781 static struct ev_loop default_loop_struct; 2146 static struct ev_loop default_loop_struct;
782 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 */
783 2148
784#else 2149#else
785 2150
786 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 */
787 #define VAR(name,decl) static decl; 2152 #define VAR(name,decl) static decl;
788 #include "ev_vars.h" 2153 #include "ev_vars.h"
789 #undef VAR 2154 #undef VAR
790 2155
791 static int ev_default_loop_ptr; 2156 static int ev_default_loop_ptr;
792 2157
793#endif 2158#endif
794 2159
795#if EV_FEATURE_API 2160#if EV_FEATURE_API
796# 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)
797# 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)
798# define EV_INVOKE_PENDING invoke_cb (EV_A) 2163# define EV_INVOKE_PENDING invoke_cb (EV_A)
799#else 2164#else
800# define EV_RELEASE_CB (void)0 2165# define EV_RELEASE_CB (void)0
801# define EV_ACQUIRE_CB (void)0 2166# define EV_ACQUIRE_CB (void)0
802# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2167# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
… …
806 2171
807/*****************************************************************************/ 2172/*****************************************************************************/
808 2173
809#ifndef EV_HAVE_EV_TIME 2174#ifndef EV_HAVE_EV_TIME
810ev_tstamp 2175ev_tstamp
811ev_time (void) 2176ev_time (void) EV_NOEXCEPT
812{ 2177{
813#if EV_USE_REALTIME 2178#if EV_USE_REALTIME
814 if (expect_true (have_realtime)) 2179 if (ecb_expect_true (have_realtime))
815 { 2180 {
816 struct timespec ts; 2181 struct timespec ts;
817 clock_gettime (CLOCK_REALTIME, &ts); 2182 clock_gettime (CLOCK_REALTIME, &ts);
818 return ts.tv_sec + ts.tv_nsec * 1e-9; 2183 return EV_TS_GET (ts);
819 } 2184 }
820#endif 2185#endif
821 2186
2187 {
822 struct timeval tv; 2188 struct timeval tv;
823 gettimeofday (&tv, 0); 2189 gettimeofday (&tv, 0);
824 return tv.tv_sec + tv.tv_usec * 1e-6; 2190 return EV_TV_GET (tv);
2191 }
825} 2192}
826#endif 2193#endif
827 2194
828inline_size ev_tstamp 2195inline_size ev_tstamp
829get_clock (void) 2196get_clock (void)
830{ 2197{
831#if EV_USE_MONOTONIC 2198#if EV_USE_MONOTONIC
832 if (expect_true (have_monotonic)) 2199 if (ecb_expect_true (have_monotonic))
833 { 2200 {
834 struct timespec ts; 2201 struct timespec ts;
835 clock_gettime (CLOCK_MONOTONIC, &ts); 2202 clock_gettime (CLOCK_MONOTONIC, &ts);
836 return ts.tv_sec + ts.tv_nsec * 1e-9; 2203 return EV_TS_GET (ts);
837 } 2204 }
838#endif 2205#endif
839 2206
840 return ev_time (); 2207 return ev_time ();
841} 2208}
842 2209
843#if EV_MULTIPLICITY 2210#if EV_MULTIPLICITY
844ev_tstamp 2211ev_tstamp
845ev_now (EV_P) 2212ev_now (EV_P) EV_NOEXCEPT
846{ 2213{
847 return ev_rt_now; 2214 return ev_rt_now;
848} 2215}
849#endif 2216#endif
850 2217
851void 2218void
852ev_sleep (ev_tstamp delay) 2219ev_sleep (ev_tstamp delay) EV_NOEXCEPT
853{ 2220{
854 if (delay > 0.) 2221 if (delay > EV_TS_CONST (0.))
855 { 2222 {
856#if EV_USE_NANOSLEEP 2223#if EV_USE_NANOSLEEP
857 struct timespec ts; 2224 struct timespec ts;
858 2225
859 EV_TS_SET (ts, delay); 2226 EV_TS_SET (ts, delay);
860 nanosleep (&ts, 0); 2227 nanosleep (&ts, 0);
861#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) */
862 Sleep ((unsigned long)(delay * 1e3)); 2231 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
863#else 2232#else
864 struct timeval tv; 2233 struct timeval tv;
865 2234
866 /* 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 */
867 /* something not guaranteed by newer posix versions, but guaranteed */ 2236 /* something not guaranteed by newer posix versions, but guaranteed */
… …
885 2254
886 do 2255 do
887 ncur <<= 1; 2256 ncur <<= 1;
888 while (cnt > ncur); 2257 while (cnt > ncur);
889 2258
890 /* 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 */
891 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2260 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
892 { 2261 {
893 ncur *= elem; 2262 ncur *= elem;
894 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);
895 ncur = ncur - sizeof (void *) * 4; 2264 ncur = ncur - sizeof (void *) * 4;
… …
897 } 2266 }
898 2267
899 return ncur; 2268 return ncur;
900} 2269}
901 2270
902static noinline void * 2271ecb_noinline ecb_cold
2272static void *
903array_realloc (int elem, void *base, int *cur, int cnt) 2273array_realloc (int elem, void *base, int *cur, int cnt)
904{ 2274{
905 *cur = array_nextsize (elem, *cur, cnt); 2275 *cur = array_nextsize (elem, *cur, cnt);
906 return ev_realloc (base, elem * *cur); 2276 return ev_realloc (base, elem * *cur);
907} 2277}
908 2278
2279#define array_needsize_noinit(base,offset,count)
2280
909#define array_init_zero(base,count) \ 2281#define array_needsize_zerofill(base,offset,count) \
910 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2282 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
911 2283
912#define array_needsize(type,base,cur,cnt,init) \ 2284#define array_needsize(type,base,cur,cnt,init) \
913 if (expect_false ((cnt) > (cur))) \ 2285 if (ecb_expect_false ((cnt) > (cur))) \
914 { \ 2286 { \
915 int ocur_ = (cur); \ 2287 ecb_unused int ocur_ = (cur); \
916 (base) = (type *)array_realloc \ 2288 (base) = (type *)array_realloc \
917 (sizeof (type), (base), &(cur), (cnt)); \ 2289 (sizeof (type), (base), &(cur), (cnt)); \
918 init ((base) + (ocur_), (cur) - ocur_); \ 2290 init ((base), ocur_, ((cur) - ocur_)); \
919 } 2291 }
920 2292
921#if 0 2293#if 0
922#define array_slim(type,stem) \ 2294#define array_slim(type,stem) \
923 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2295 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
932 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
933 2305
934/*****************************************************************************/ 2306/*****************************************************************************/
935 2307
936/* dummy callback for pending events */ 2308/* dummy callback for pending events */
937static void noinline 2309ecb_noinline
2310static void
938pendingcb (EV_P_ ev_prepare *w, int revents) 2311pendingcb (EV_P_ ev_prepare *w, int revents)
939{ 2312{
940} 2313}
941 2314
942void noinline 2315ecb_noinline
2316void
943ev_feed_event (EV_P_ void *w, int revents) 2317ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
944{ 2318{
945 W w_ = (W)w; 2319 W w_ = (W)w;
946 int pri = ABSPRI (w_); 2320 int pri = ABSPRI (w_);
947 2321
948 if (expect_false (w_->pending)) 2322 if (ecb_expect_false (w_->pending))
949 pendings [pri][w_->pending - 1].events |= revents; 2323 pendings [pri][w_->pending - 1].events |= revents;
950 else 2324 else
951 { 2325 {
952 w_->pending = ++pendingcnt [pri]; 2326 w_->pending = ++pendingcnt [pri];
953 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2327 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
954 pendings [pri][w_->pending - 1].w = w_; 2328 pendings [pri][w_->pending - 1].w = w_;
955 pendings [pri][w_->pending - 1].events = revents; 2329 pendings [pri][w_->pending - 1].events = revents;
956 } 2330 }
2331
2332 pendingpri = NUMPRI - 1;
957} 2333}
958 2334
959inline_speed void 2335inline_speed void
960feed_reverse (EV_P_ W w) 2336feed_reverse (EV_P_ W w)
961{ 2337{
962 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2338 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
963 rfeeds [rfeedcnt++] = w; 2339 rfeeds [rfeedcnt++] = w;
964} 2340}
965 2341
966inline_size void 2342inline_size void
967feed_reverse_done (EV_P_ int revents) 2343feed_reverse_done (EV_P_ int revents)
… …
1002inline_speed void 2378inline_speed void
1003fd_event (EV_P_ int fd, int revents) 2379fd_event (EV_P_ int fd, int revents)
1004{ 2380{
1005 ANFD *anfd = anfds + fd; 2381 ANFD *anfd = anfds + fd;
1006 2382
1007 if (expect_true (!anfd->reify)) 2383 if (ecb_expect_true (!anfd->reify))
1008 fd_event_nocheck (EV_A_ fd, revents); 2384 fd_event_nocheck (EV_A_ fd, revents);
1009} 2385}
1010 2386
1011void 2387void
1012ev_feed_fd_event (EV_P_ int fd, int revents) 2388ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
1013{ 2389{
1014 if (fd >= 0 && fd < anfdmax) 2390 if (fd >= 0 && fd < anfdmax)
1015 fd_event_nocheck (EV_A_ fd, revents); 2391 fd_event_nocheck (EV_A_ fd, revents);
1016} 2392}
1017 2393
… …
1020inline_size void 2396inline_size void
1021fd_reify (EV_P) 2397fd_reify (EV_P)
1022{ 2398{
1023 int i; 2399 int i;
1024 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
1025#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2413#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1026 for (i = 0; i < fdchangecnt; ++i) 2414 for (i = 0; i < changecnt; ++i)
1027 { 2415 {
1028 int fd = fdchanges [i]; 2416 int fd = fdchanges [i];
1029 ANFD *anfd = anfds + fd; 2417 ANFD *anfd = anfds + fd;
1030 2418
1031 if (anfd->reify & EV__IOFDSET && anfd->head) 2419 if (anfd->reify & EV__IOFDSET && anfd->head)
… …
1045 } 2433 }
1046 } 2434 }
1047 } 2435 }
1048#endif 2436#endif
1049 2437
1050 for (i = 0; i < fdchangecnt; ++i) 2438 for (i = 0; i < changecnt; ++i)
1051 { 2439 {
1052 int fd = fdchanges [i]; 2440 int fd = fdchanges [i];
1053 ANFD *anfd = anfds + fd; 2441 ANFD *anfd = anfds + fd;
1054 ev_io *w; 2442 ev_io *w;
1055 2443
1056 unsigned char o_events = anfd->events; 2444 unsigned char o_events = anfd->events;
1057 unsigned char o_reify = anfd->reify; 2445 unsigned char o_reify = anfd->reify;
1058 2446
1059 anfd->reify = 0; 2447 anfd->reify = 0;
1060 2448
1061 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2449 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1062 { 2450 {
1063 anfd->events = 0; 2451 anfd->events = 0;
1064 2452
1065 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)
1066 anfd->events |= (unsigned char)w->events; 2454 anfd->events |= (unsigned char)w->events;
… …
1071 2459
1072 if (o_reify & EV__IOFDSET) 2460 if (o_reify & EV__IOFDSET)
1073 backend_modify (EV_A_ fd, o_events, anfd->events); 2461 backend_modify (EV_A_ fd, o_events, anfd->events);
1074 } 2462 }
1075 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
1076 fdchangecnt = 0; 2471 fdchangecnt -= changecnt;
1077} 2472}
1078 2473
1079/* something about the given fd changed */ 2474/* something about the given fd changed */
1080inline_size void 2475inline_size
2476void
1081fd_change (EV_P_ int fd, int flags) 2477fd_change (EV_P_ int fd, int flags)
1082{ 2478{
1083 unsigned char reify = anfds [fd].reify; 2479 unsigned char reify = anfds [fd].reify;
1084 anfds [fd].reify |= flags; 2480 anfds [fd].reify = reify | flags;
1085 2481
1086 if (expect_true (!reify)) 2482 if (ecb_expect_true (!reify))
1087 { 2483 {
1088 ++fdchangecnt; 2484 ++fdchangecnt;
1089 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2485 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1090 fdchanges [fdchangecnt - 1] = fd; 2486 fdchanges [fdchangecnt - 1] = fd;
1091 } 2487 }
1092} 2488}
1093 2489
1094/* 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 */
1095inline_speed void 2491inline_speed ecb_cold void
1096fd_kill (EV_P_ int fd) 2492fd_kill (EV_P_ int fd)
1097{ 2493{
1098 ev_io *w; 2494 ev_io *w;
1099 2495
1100 while ((w = (ev_io *)anfds [fd].head)) 2496 while ((w = (ev_io *)anfds [fd].head))
… …
1103 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);
1104 } 2500 }
1105} 2501}
1106 2502
1107/* check whether the given fd is actually valid, for error recovery */ 2503/* check whether the given fd is actually valid, for error recovery */
1108inline_size int 2504inline_size ecb_cold int
1109fd_valid (int fd) 2505fd_valid (int fd)
1110{ 2506{
1111#ifdef _WIN32 2507#ifdef _WIN32
1112 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2508 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1113#else 2509#else
1114 return fcntl (fd, F_GETFD) != -1; 2510 return fcntl (fd, F_GETFD) != -1;
1115#endif 2511#endif
1116} 2512}
1117 2513
1118/* called on EBADF to verify fds */ 2514/* called on EBADF to verify fds */
1119static void noinline 2515ecb_noinline ecb_cold
2516static void
1120fd_ebadf (EV_P) 2517fd_ebadf (EV_P)
1121{ 2518{
1122 int fd; 2519 int fd;
1123 2520
1124 for (fd = 0; fd < anfdmax; ++fd) 2521 for (fd = 0; fd < anfdmax; ++fd)
… …
1126 if (!fd_valid (fd) && errno == EBADF) 2523 if (!fd_valid (fd) && errno == EBADF)
1127 fd_kill (EV_A_ fd); 2524 fd_kill (EV_A_ fd);
1128} 2525}
1129 2526
1130/* 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 */
1131static void noinline 2528ecb_noinline ecb_cold
2529static void
1132fd_enomem (EV_P) 2530fd_enomem (EV_P)
1133{ 2531{
1134 int fd; 2532 int fd;
1135 2533
1136 for (fd = anfdmax; fd--; ) 2534 for (fd = anfdmax; fd--; )
… …
1140 break; 2538 break;
1141 } 2539 }
1142} 2540}
1143 2541
1144/* 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 */
1145static void noinline 2543ecb_noinline
2544static void
1146fd_rearm_all (EV_P) 2545fd_rearm_all (EV_P)
1147{ 2546{
1148 int fd; 2547 int fd;
1149 2548
1150 for (fd = 0; fd < anfdmax; ++fd) 2549 for (fd = 0; fd < anfdmax; ++fd)
… …
1203 ev_tstamp minat; 2602 ev_tstamp minat;
1204 ANHE *minpos; 2603 ANHE *minpos;
1205 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2604 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1206 2605
1207 /* find minimum child */ 2606 /* find minimum child */
1208 if (expect_true (pos + DHEAP - 1 < E)) 2607 if (ecb_expect_true (pos + DHEAP - 1 < E))
1209 { 2608 {
1210 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2609 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1211 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));
1212 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));
1213 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));
1214 } 2613 }
1215 else if (pos < E) 2614 else if (pos < E)
1216 { 2615 {
1217 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2616 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1218 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));
1219 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));
1220 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));
1221 } 2620 }
1222 else 2621 else
1223 break; 2622 break;
1224 2623
1225 if (ANHE_at (he) <= minat) 2624 if (ANHE_at (he) <= minat)
… …
1233 2632
1234 heap [k] = he; 2633 heap [k] = he;
1235 ev_active (ANHE_w (he)) = k; 2634 ev_active (ANHE_w (he)) = k;
1236} 2635}
1237 2636
1238#else /* 4HEAP */ 2637#else /* not 4HEAP */
1239 2638
1240#define HEAP0 1 2639#define HEAP0 1
1241#define HPARENT(k) ((k) >> 1) 2640#define HPARENT(k) ((k) >> 1)
1242#define UPHEAP_DONE(p,k) (!(p)) 2641#define UPHEAP_DONE(p,k) (!(p))
1243 2642
… …
1315 upheap (heap, i + HEAP0); 2714 upheap (heap, i + HEAP0);
1316} 2715}
1317 2716
1318/*****************************************************************************/ 2717/*****************************************************************************/
1319 2718
1320/* associate signal watchers to a signal signal */ 2719/* associate signal watchers to a signal */
1321typedef struct 2720typedef struct
1322{ 2721{
1323 EV_ATOMIC_T pending; 2722 EV_ATOMIC_T pending;
1324#if EV_MULTIPLICITY 2723#if EV_MULTIPLICITY
1325 EV_P; 2724 EV_P;
… …
1331 2730
1332/*****************************************************************************/ 2731/*****************************************************************************/
1333 2732
1334#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2733#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1335 2734
1336static void noinline 2735ecb_noinline ecb_cold
2736static void
1337evpipe_init (EV_P) 2737evpipe_init (EV_P)
1338{ 2738{
1339 if (!ev_is_active (&pipe_w)) 2739 if (!ev_is_active (&pipe_w))
1340 { 2740 {
2741 int fds [2];
2742
1341# if EV_USE_EVENTFD 2743# if EV_USE_EVENTFD
2744 fds [0] = -1;
1342 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2745 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1343 if (evfd < 0 && errno == EINVAL) 2746 if (fds [1] < 0 && errno == EINVAL)
1344 evfd = eventfd (0, 0); 2747 fds [1] = eventfd (0, 0);
1345 2748
1346 if (evfd >= 0) 2749 if (fds [1] < 0)
2750# endif
1347 { 2751 {
2752 while (pipe (fds))
2753 ev_syserr ("(libev) error creating signal/async pipe");
2754
2755 fd_intern (fds [0]);
2756 }
2757
1348 evpipe [0] = -1; 2758 evpipe [0] = fds [0];
1349 fd_intern (evfd); /* doing it twice doesn't hurt */ 2759
1350 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));
1351 } 2810 }
1352 else 2811 else
1353# endif 2812#endif
1354 { 2813 {
1355 while (pipe (evpipe)) 2814#ifdef _WIN32
1356 ev_syserr ("(libev) error creating signal/async pipe"); 2815 WSABUF buf;
1357 2816 DWORD sent;
1358 fd_intern (evpipe [0]); 2817 buf.buf = (char *)&buf;
1359 fd_intern (evpipe [1]); 2818 buf.len = 1;
1360 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2819 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2820#else
2821 write (evpipe [1], &(evpipe [1]), 1);
2822#endif
1361 } 2823 }
1362
1363 ev_io_start (EV_A_ &pipe_w);
1364 ev_unref (EV_A); /* watcher should not keep loop alive */
1365 }
1366}
1367
1368inline_size void
1369evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1370{
1371 if (!*flag)
1372 {
1373 int old_errno = errno; /* save errno because write might clobber it */
1374 char dummy;
1375
1376 *flag = 1;
1377
1378#if EV_USE_EVENTFD
1379 if (evfd >= 0)
1380 {
1381 uint64_t counter = 1;
1382 write (evfd, &counter, sizeof (uint64_t));
1383 }
1384 else
1385#endif
1386 /* win32 people keep sending patches that change this write() to send() */
1387 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1388 /* so when you think this write should be a send instead, please find out */
1389 /* where your send() is from - it's definitely not the microsoft send, and */
1390 /* tell me. thank you. */
1391 write (evpipe [1], &dummy, 1);
1392 2824
1393 errno = old_errno; 2825 errno = old_errno;
1394 } 2826 }
1395} 2827}
1396 2828
… …
1399static void 2831static void
1400pipecb (EV_P_ ev_io *iow, int revents) 2832pipecb (EV_P_ ev_io *iow, int revents)
1401{ 2833{
1402 int i; 2834 int i;
1403 2835
2836 if (revents & EV_READ)
2837 {
1404#if EV_USE_EVENTFD 2838#if EV_USE_EVENTFD
1405 if (evfd >= 0) 2839 if (evpipe [0] < 0)
1406 { 2840 {
1407 uint64_t counter; 2841 uint64_t counter;
1408 read (evfd, &counter, sizeof (uint64_t)); 2842 read (evpipe [1], &counter, sizeof (uint64_t));
1409 } 2843 }
1410 else 2844 else
1411#endif 2845#endif
1412 { 2846 {
1413 char dummy; 2847 char dummy[4];
1414 /* 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
1415 read (evpipe [0], &dummy, 1); 2856 read (evpipe [0], &dummy, sizeof (dummy));
2857#endif
2858 }
1416 } 2859 }
2860
2861 pipe_write_skipped = 0;
2862
2863 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1417 2864
1418#if EV_SIGNAL_ENABLE 2865#if EV_SIGNAL_ENABLE
1419 if (sig_pending) 2866 if (sig_pending)
1420 { 2867 {
1421 sig_pending = 0; 2868 sig_pending = 0;
1422 2869
2870 ECB_MEMORY_FENCE;
2871
1423 for (i = EV_NSIG - 1; i--; ) 2872 for (i = EV_NSIG - 1; i--; )
1424 if (expect_false (signals [i].pending)) 2873 if (ecb_expect_false (signals [i].pending))
1425 ev_feed_signal_event (EV_A_ i + 1); 2874 ev_feed_signal_event (EV_A_ i + 1);
1426 } 2875 }
1427#endif 2876#endif
1428 2877
1429#if EV_ASYNC_ENABLE 2878#if EV_ASYNC_ENABLE
1430 if (async_pending) 2879 if (async_pending)
1431 { 2880 {
1432 async_pending = 0; 2881 async_pending = 0;
2882
2883 ECB_MEMORY_FENCE;
1433 2884
1434 for (i = asynccnt; i--; ) 2885 for (i = asynccnt; i--; )
1435 if (asyncs [i]->sent) 2886 if (asyncs [i]->sent)
1436 { 2887 {
1437 asyncs [i]->sent = 0; 2888 asyncs [i]->sent = 0;
2889 ECB_MEMORY_FENCE_RELEASE;
1438 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2890 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1439 } 2891 }
1440 } 2892 }
1441#endif 2893#endif
1442} 2894}
1443 2895
1444/*****************************************************************************/ 2896/*****************************************************************************/
1445 2897
1446void 2898void
1447ev_feed_signal (int signum) 2899ev_feed_signal (int signum) EV_NOEXCEPT
1448{ 2900{
1449#if EV_MULTIPLICITY 2901#if EV_MULTIPLICITY
2902 EV_P;
2903 ECB_MEMORY_FENCE_ACQUIRE;
1450 EV_P = signals [signum - 1].loop; 2904 EV_A = signals [signum - 1].loop;
1451 2905
1452 if (!EV_A) 2906 if (!EV_A)
1453 return; 2907 return;
1454#endif 2908#endif
1455 2909
… …
1465#endif 2919#endif
1466 2920
1467 ev_feed_signal (signum); 2921 ev_feed_signal (signum);
1468} 2922}
1469 2923
1470void noinline 2924ecb_noinline
2925void
1471ev_feed_signal_event (EV_P_ int signum) 2926ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1472{ 2927{
1473 WL w; 2928 WL w;
1474 2929
1475 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2930 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1476 return; 2931 return;
1477 2932
1478 --signum; 2933 --signum;
1479 2934
1480#if EV_MULTIPLICITY 2935#if EV_MULTIPLICITY
1481 /* 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 */
1482 /* or, likely more useful, feeding a signal nobody is waiting for */ 2937 /* or, likely more useful, feeding a signal nobody is waiting for */
1483 2938
1484 if (expect_false (signals [signum].loop != EV_A)) 2939 if (ecb_expect_false (signals [signum].loop != EV_A))
1485 return; 2940 return;
1486#endif 2941#endif
1487 2942
1488 signals [signum].pending = 0; 2943 signals [signum].pending = 0;
2944 ECB_MEMORY_FENCE_RELEASE;
1489 2945
1490 for (w = signals [signum].head; w; w = w->next) 2946 for (w = signals [signum].head; w; w = w->next)
1491 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2947 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1492} 2948}
1493 2949
… …
1572 3028
1573#endif 3029#endif
1574 3030
1575/*****************************************************************************/ 3031/*****************************************************************************/
1576 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
1577#if EV_USE_IOCP 3084#if EV_USE_IOCP
1578# include "ev_iocp.c" 3085# include "ev_iocp.c"
1579#endif 3086#endif
1580#if EV_USE_PORT 3087#if EV_USE_PORT
1581# include "ev_port.c" 3088# include "ev_port.c"
… …
1584# include "ev_kqueue.c" 3091# include "ev_kqueue.c"
1585#endif 3092#endif
1586#if EV_USE_EPOLL 3093#if EV_USE_EPOLL
1587# include "ev_epoll.c" 3094# include "ev_epoll.c"
1588#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
1589#if EV_USE_POLL 3102#if EV_USE_POLL
1590# include "ev_poll.c" 3103# include "ev_poll.c"
1591#endif 3104#endif
1592#if EV_USE_SELECT 3105#if EV_USE_SELECT
1593# include "ev_select.c" 3106# include "ev_select.c"
1594#endif 3107#endif
1595 3108
1596int 3109ecb_cold int
1597ev_version_major (void) 3110ev_version_major (void) EV_NOEXCEPT
1598{ 3111{
1599 return EV_VERSION_MAJOR; 3112 return EV_VERSION_MAJOR;
1600} 3113}
1601 3114
1602int 3115ecb_cold int
1603ev_version_minor (void) 3116ev_version_minor (void) EV_NOEXCEPT
1604{ 3117{
1605 return EV_VERSION_MINOR; 3118 return EV_VERSION_MINOR;
1606} 3119}
1607 3120
1608/* 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 */
1609int inline_size 3122inline_size ecb_cold int
1610enable_secure (void) 3123enable_secure (void)
1611{ 3124{
1612#ifdef _WIN32 3125#ifdef _WIN32
1613 return 0; 3126 return 0;
1614#else 3127#else
1615 return getuid () != geteuid () 3128 return getuid () != geteuid ()
1616 || getgid () != getegid (); 3129 || getgid () != getegid ();
1617#endif 3130#endif
1618} 3131}
1619 3132
3133ecb_cold
1620unsigned int 3134unsigned int
1621ev_supported_backends (void) 3135ev_supported_backends (void) EV_NOEXCEPT
1622{ 3136{
1623 unsigned int flags = 0; 3137 unsigned int flags = 0;
1624 3138
1625 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3139 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1626 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3140 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1627 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3141 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1628 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3142 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1629 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3143 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1630 3144 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3145 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3146
1631 return flags; 3147 return flags;
1632} 3148}
1633 3149
3150ecb_cold
1634unsigned int 3151unsigned int
1635ev_recommended_backends (void) 3152ev_recommended_backends (void) EV_NOEXCEPT
1636{ 3153{
1637 unsigned int flags = ev_supported_backends (); 3154 unsigned int flags = ev_supported_backends ();
1638 3155
1639#ifndef __NetBSD__ 3156#ifndef __NetBSD__
1640 /* kqueue is borked on everything but netbsd apparently */ 3157 /* kqueue is borked on everything but netbsd apparently */
… …
1648#endif 3165#endif
1649#ifdef __FreeBSD__ 3166#ifdef __FreeBSD__
1650 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) */
1651#endif 3168#endif
1652 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
1653 return flags; 3179 return flags;
1654} 3180}
1655 3181
3182ecb_cold
1656unsigned int 3183unsigned int
1657ev_embeddable_backends (void) 3184ev_embeddable_backends (void) EV_NOEXCEPT
1658{ 3185{
1659 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3186 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
1660 3187
1661 /* 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 */
1662 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 */
1663 flags &= ~EVBACKEND_EPOLL; 3190 flags &= ~EVBACKEND_EPOLL;
1664 3191
3192 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
3193
1665 return flags; 3194 return flags;
1666} 3195}
1667 3196
1668unsigned int 3197unsigned int
1669ev_backend (EV_P) 3198ev_backend (EV_P) EV_NOEXCEPT
1670{ 3199{
1671 return backend; 3200 return backend;
1672} 3201}
1673 3202
1674#if EV_FEATURE_API 3203#if EV_FEATURE_API
1675unsigned int 3204unsigned int
1676ev_iteration (EV_P) 3205ev_iteration (EV_P) EV_NOEXCEPT
1677{ 3206{
1678 return loop_count; 3207 return loop_count;
1679} 3208}
1680 3209
1681unsigned int 3210unsigned int
1682ev_depth (EV_P) 3211ev_depth (EV_P) EV_NOEXCEPT
1683{ 3212{
1684 return loop_depth; 3213 return loop_depth;
1685} 3214}
1686 3215
1687void 3216void
1688ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3217ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1689{ 3218{
1690 io_blocktime = interval; 3219 io_blocktime = interval;
1691} 3220}
1692 3221
1693void 3222void
1694ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3223ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1695{ 3224{
1696 timeout_blocktime = interval; 3225 timeout_blocktime = interval;
1697} 3226}
1698 3227
1699void 3228void
1700ev_set_userdata (EV_P_ void *data) 3229ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1701{ 3230{
1702 userdata = data; 3231 userdata = data;
1703} 3232}
1704 3233
1705void * 3234void *
1706ev_userdata (EV_P) 3235ev_userdata (EV_P) EV_NOEXCEPT
1707{ 3236{
1708 return userdata; 3237 return userdata;
1709} 3238}
1710 3239
3240void
1711void ev_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
1712{ 3242{
1713 invoke_cb = invoke_pending_cb; 3243 invoke_cb = invoke_pending_cb;
1714} 3244}
1715 3245
3246void
1716void ev_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
1717{ 3248{
1718 release_cb = release; 3249 release_cb = release;
1719 acquire_cb = acquire; 3250 acquire_cb = acquire;
1720} 3251}
1721#endif 3252#endif
1722 3253
1723/* initialise a loop structure, must be zero-initialised */ 3254/* initialise a loop structure, must be zero-initialised */
1724static void noinline 3255ecb_noinline ecb_cold
3256static void
1725loop_init (EV_P_ unsigned int flags) 3257loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1726{ 3258{
1727 if (!backend) 3259 if (!backend)
1728 { 3260 {
1729 origflags = flags; 3261 origflags = flags;
1730 3262
… …
1757 if (!(flags & EVFLAG_NOENV) 3289 if (!(flags & EVFLAG_NOENV)
1758 && !enable_secure () 3290 && !enable_secure ()
1759 && getenv ("LIBEV_FLAGS")) 3291 && getenv ("LIBEV_FLAGS"))
1760 flags = atoi (getenv ("LIBEV_FLAGS")); 3292 flags = atoi (getenv ("LIBEV_FLAGS"));
1761 3293
1762 ev_rt_now = ev_time (); 3294 ev_rt_now = ev_time ();
1763 mn_now = get_clock (); 3295 mn_now = get_clock ();
1764 now_floor = mn_now; 3296 now_floor = mn_now;
1765 rtmn_diff = ev_rt_now - mn_now; 3297 rtmn_diff = ev_rt_now - mn_now;
1766#if EV_FEATURE_API 3298#if EV_FEATURE_API
1767 invoke_cb = ev_invoke_pending; 3299 invoke_cb = ev_invoke_pending;
1768#endif 3300#endif
1769 3301
1770 io_blocktime = 0.; 3302 io_blocktime = 0.;
1771 timeout_blocktime = 0.; 3303 timeout_blocktime = 0.;
1772 backend = 0; 3304 backend = 0;
1773 backend_fd = -1; 3305 backend_fd = -1;
1774 sig_pending = 0; 3306 sig_pending = 0;
1775#if EV_ASYNC_ENABLE 3307#if EV_ASYNC_ENABLE
1776 async_pending = 0; 3308 async_pending = 0;
1777#endif 3309#endif
3310 pipe_write_skipped = 0;
3311 pipe_write_wanted = 0;
3312 evpipe [0] = -1;
3313 evpipe [1] = -1;
1778#if EV_USE_INOTIFY 3314#if EV_USE_INOTIFY
1779 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3315 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1780#endif 3316#endif
1781#if EV_USE_SIGNALFD 3317#if EV_USE_SIGNALFD
1782 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3318 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3319#endif
3320#if EV_USE_TIMERFD
3321 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
1783#endif 3322#endif
1784 3323
1785 if (!(flags & EVBACKEND_MASK)) 3324 if (!(flags & EVBACKEND_MASK))
1786 flags |= ev_recommended_backends (); 3325 flags |= ev_recommended_backends ();
1787 3326
1788#if EV_USE_IOCP 3327#if EV_USE_IOCP
1789 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 3328 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1790#endif 3329#endif
1791#if EV_USE_PORT 3330#if EV_USE_PORT
1792 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3331 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1793#endif 3332#endif
1794#if EV_USE_KQUEUE 3333#if EV_USE_KQUEUE
1795 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);
1796#endif 3341#endif
1797#if EV_USE_EPOLL 3342#if EV_USE_EPOLL
1798 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3343 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1799#endif 3344#endif
1800#if EV_USE_POLL 3345#if EV_USE_POLL
1801 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3346 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1802#endif 3347#endif
1803#if EV_USE_SELECT 3348#if EV_USE_SELECT
1804 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3349 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1805#endif 3350#endif
1806 3351
1807 ev_prepare_init (&pending_w, pendingcb); 3352 ev_prepare_init (&pending_w, pendingcb);
1808 3353
1809#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3354#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1812#endif 3357#endif
1813 } 3358 }
1814} 3359}
1815 3360
1816/* free up a loop structure */ 3361/* free up a loop structure */
3362ecb_cold
1817void 3363void
1818ev_loop_destroy (EV_P) 3364ev_loop_destroy (EV_P)
1819{ 3365{
1820 int i; 3366 int i;
1821 3367
… …
1825 return; 3371 return;
1826#endif 3372#endif
1827 3373
1828#if EV_CLEANUP_ENABLE 3374#if EV_CLEANUP_ENABLE
1829 /* queue cleanup watchers (and execute them) */ 3375 /* queue cleanup watchers (and execute them) */
1830 if (expect_false (cleanupcnt)) 3376 if (ecb_expect_false (cleanupcnt))
1831 { 3377 {
1832 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); 3378 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1833 EV_INVOKE_PENDING; 3379 EV_INVOKE_PENDING;
1834 } 3380 }
1835#endif 3381#endif
1836 3382
1837#if EV_CHILD_ENABLE 3383#if EV_CHILD_ENABLE
1838 if (ev_is_active (&childev)) 3384 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1839 { 3385 {
1840 ev_ref (EV_A); /* child watcher */ 3386 ev_ref (EV_A); /* child watcher */
1841 ev_signal_stop (EV_A_ &childev); 3387 ev_signal_stop (EV_A_ &childev);
1842 } 3388 }
1843#endif 3389#endif
… …
1845 if (ev_is_active (&pipe_w)) 3391 if (ev_is_active (&pipe_w))
1846 { 3392 {
1847 /*ev_ref (EV_A);*/ 3393 /*ev_ref (EV_A);*/
1848 /*ev_io_stop (EV_A_ &pipe_w);*/ 3394 /*ev_io_stop (EV_A_ &pipe_w);*/
1849 3395
1850#if EV_USE_EVENTFD
1851 if (evfd >= 0)
1852 close (evfd);
1853#endif
1854
1855 if (evpipe [0] >= 0)
1856 {
1857 EV_WIN32_CLOSE_FD (evpipe [0]); 3396 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1858 EV_WIN32_CLOSE_FD (evpipe [1]); 3397 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1859 }
1860 } 3398 }
1861 3399
1862#if EV_USE_SIGNALFD 3400#if EV_USE_SIGNALFD
1863 if (ev_is_active (&sigfd_w)) 3401 if (ev_is_active (&sigfd_w))
1864 close (sigfd); 3402 close (sigfd);
1865#endif 3403#endif
1866 3404
3405#if EV_USE_TIMERFD
3406 if (ev_is_active (&timerfd_w))
3407 close (timerfd);
3408#endif
3409
1867#if EV_USE_INOTIFY 3410#if EV_USE_INOTIFY
1868 if (fs_fd >= 0) 3411 if (fs_fd >= 0)
1869 close (fs_fd); 3412 close (fs_fd);
1870#endif 3413#endif
1871 3414
1872 if (backend_fd >= 0) 3415 if (backend_fd >= 0)
1873 close (backend_fd); 3416 close (backend_fd);
1874 3417
1875#if EV_USE_IOCP 3418#if EV_USE_IOCP
1876 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); 3419 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1877#endif 3420#endif
1878#if EV_USE_PORT 3421#if EV_USE_PORT
1879 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3422 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1880#endif 3423#endif
1881#if EV_USE_KQUEUE 3424#if EV_USE_KQUEUE
1882 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);
1883#endif 3432#endif
1884#if EV_USE_EPOLL 3433#if EV_USE_EPOLL
1885 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3434 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1886#endif 3435#endif
1887#if EV_USE_POLL 3436#if EV_USE_POLL
1888 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3437 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1889#endif 3438#endif
1890#if EV_USE_SELECT 3439#if EV_USE_SELECT
1891 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3440 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1892#endif 3441#endif
1893 3442
1894 for (i = NUMPRI; i--; ) 3443 for (i = NUMPRI; i--; )
1895 { 3444 {
1896 array_free (pending, [i]); 3445 array_free (pending, [i]);
… …
1938 3487
1939inline_size void 3488inline_size void
1940loop_fork (EV_P) 3489loop_fork (EV_P)
1941{ 3490{
1942#if EV_USE_PORT 3491#if EV_USE_PORT
1943 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3492 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1944#endif 3493#endif
1945#if EV_USE_KQUEUE 3494#if EV_USE_KQUEUE
1946 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);
1947#endif 3502#endif
1948#if EV_USE_EPOLL 3503#if EV_USE_EPOLL
1949 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3504 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1950#endif 3505#endif
1951#if EV_USE_INOTIFY 3506#if EV_USE_INOTIFY
1952 infy_fork (EV_A); 3507 infy_fork (EV_A);
1953#endif 3508#endif
1954 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
1955 if (ev_is_active (&pipe_w)) 3532 if (ev_is_active (&pipe_w))
1956 { 3533 {
1957 /* this "locks" the handlers against writing to the pipe */ 3534 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1958 /* while we modify the fd vars */ 3535
1959 sig_pending = 1;
1960#if EV_ASYNC_ENABLE
1961 async_pending = 1;
1962#endif
1963
1964 ev_ref (EV_A); 3536 ev_ref (EV_A);
1965 ev_io_stop (EV_A_ &pipe_w); 3537 ev_io_stop (EV_A_ &pipe_w);
1966 3538
1967#if EV_USE_EVENTFD
1968 if (evfd >= 0)
1969 close (evfd);
1970#endif
1971
1972 if (evpipe [0] >= 0) 3539 if (evpipe [0] >= 0)
1973 {
1974 EV_WIN32_CLOSE_FD (evpipe [0]); 3540 EV_WIN32_CLOSE_FD (evpipe [0]);
1975 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);
1976 } 3545 }
1977 3546 #endif
1978#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1979 evpipe_init (EV_A);
1980 /* now iterate over everything, in case we missed something */
1981 pipecb (EV_A_ &pipe_w, EV_READ);
1982#endif
1983 } 3547 }
1984 3548
1985 postfork = 0; 3549 postfork = 0;
1986} 3550}
1987 3551
1988#if EV_MULTIPLICITY 3552#if EV_MULTIPLICITY
1989 3553
3554ecb_cold
1990struct ev_loop * 3555struct ev_loop *
1991ev_loop_new (unsigned int flags) 3556ev_loop_new (unsigned int flags) EV_NOEXCEPT
1992{ 3557{
1993 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3558 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1994 3559
1995 memset (EV_A, 0, sizeof (struct ev_loop)); 3560 memset (EV_A, 0, sizeof (struct ev_loop));
1996 loop_init (EV_A_ flags); 3561 loop_init (EV_A_ flags);
… …
2003} 3568}
2004 3569
2005#endif /* multiplicity */ 3570#endif /* multiplicity */
2006 3571
2007#if EV_VERIFY 3572#if EV_VERIFY
2008static void noinline 3573ecb_noinline ecb_cold
3574static void
2009verify_watcher (EV_P_ W w) 3575verify_watcher (EV_P_ W w)
2010{ 3576{
2011 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));
2012 3578
2013 if (w->pending) 3579 if (w->pending)
2014 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));
2015} 3581}
2016 3582
2017static void noinline 3583ecb_noinline ecb_cold
3584static void
2018verify_heap (EV_P_ ANHE *heap, int N) 3585verify_heap (EV_P_ ANHE *heap, int N)
2019{ 3586{
2020 int i; 3587 int i;
2021 3588
2022 for (i = HEAP0; i < N + HEAP0; ++i) 3589 for (i = HEAP0; i < N + HEAP0; ++i)
… …
2027 3594
2028 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3595 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2029 } 3596 }
2030} 3597}
2031 3598
2032static void noinline 3599ecb_noinline ecb_cold
3600static void
2033array_verify (EV_P_ W *ws, int cnt) 3601array_verify (EV_P_ W *ws, int cnt)
2034{ 3602{
2035 while (cnt--) 3603 while (cnt--)
2036 { 3604 {
2037 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3605 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
2039 } 3607 }
2040} 3608}
2041#endif 3609#endif
2042 3610
2043#if EV_FEATURE_API 3611#if EV_FEATURE_API
2044void 3612void ecb_cold
2045ev_verify (EV_P) 3613ev_verify (EV_P) EV_NOEXCEPT
2046{ 3614{
2047#if EV_VERIFY 3615#if EV_VERIFY
2048 int i; 3616 int i;
2049 WL w; 3617 WL w, w2;
2050 3618
2051 assert (activecnt >= -1); 3619 assert (activecnt >= -1);
2052 3620
2053 assert (fdchangemax >= fdchangecnt); 3621 assert (fdchangemax >= fdchangecnt);
2054 for (i = 0; i < fdchangecnt; ++i) 3622 for (i = 0; i < fdchangecnt; ++i)
2055 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3623 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2056 3624
2057 assert (anfdmax >= 0); 3625 assert (anfdmax >= 0);
2058 for (i = 0; i < anfdmax; ++i) 3626 for (i = 0; i < anfdmax; ++i)
3627 {
3628 int j = 0;
3629
2059 for (w = anfds [i].head; w; w = w->next) 3630 for (w = w2 = anfds [i].head; w; w = w->next)
2060 { 3631 {
2061 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
2062 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));
2063 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));
2064 } 3642 }
3643 }
2065 3644
2066 assert (timermax >= timercnt); 3645 assert (timermax >= timercnt);
2067 verify_heap (EV_A_ timers, timercnt); 3646 verify_heap (EV_A_ timers, timercnt);
2068 3647
2069#if EV_PERIODIC_ENABLE 3648#if EV_PERIODIC_ENABLE
… …
2115#endif 3694#endif
2116} 3695}
2117#endif 3696#endif
2118 3697
2119#if EV_MULTIPLICITY 3698#if EV_MULTIPLICITY
3699ecb_cold
2120struct ev_loop * 3700struct ev_loop *
2121#else 3701#else
2122int 3702int
2123#endif 3703#endif
2124ev_default_loop (unsigned int flags) 3704ev_default_loop (unsigned int flags) EV_NOEXCEPT
2125{ 3705{
2126 if (!ev_default_loop_ptr) 3706 if (!ev_default_loop_ptr)
2127 { 3707 {
2128#if EV_MULTIPLICITY 3708#if EV_MULTIPLICITY
2129 EV_P = ev_default_loop_ptr = &default_loop_struct; 3709 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2148 3728
2149 return ev_default_loop_ptr; 3729 return ev_default_loop_ptr;
2150} 3730}
2151 3731
2152void 3732void
2153ev_loop_fork (EV_P) 3733ev_loop_fork (EV_P) EV_NOEXCEPT
2154{ 3734{
2155 postfork = 1; /* must be in line with ev_default_fork */ 3735 postfork = 1;
2156} 3736}
2157 3737
2158/*****************************************************************************/ 3738/*****************************************************************************/
2159 3739
2160void 3740void
… …
2162{ 3742{
2163 EV_CB_INVOKE ((W)w, revents); 3743 EV_CB_INVOKE ((W)w, revents);
2164} 3744}
2165 3745
2166unsigned int 3746unsigned int
2167ev_pending_count (EV_P) 3747ev_pending_count (EV_P) EV_NOEXCEPT
2168{ 3748{
2169 int pri; 3749 int pri;
2170 unsigned int count = 0; 3750 unsigned int count = 0;
2171 3751
2172 for (pri = NUMPRI; pri--; ) 3752 for (pri = NUMPRI; pri--; )
2173 count += pendingcnt [pri]; 3753 count += pendingcnt [pri];
2174 3754
2175 return count; 3755 return count;
2176} 3756}
2177 3757
2178void noinline 3758ecb_noinline
3759void
2179ev_invoke_pending (EV_P) 3760ev_invoke_pending (EV_P)
2180{ 3761{
2181 int pri; 3762 pendingpri = NUMPRI;
2182 3763
2183 for (pri = NUMPRI; pri--; ) 3764 do
3765 {
3766 --pendingpri;
3767
3768 /* pendingpri possibly gets modified in the inner loop */
2184 while (pendingcnt [pri]) 3769 while (pendingcnt [pendingpri])
2185 { 3770 {
2186 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3771 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2187 3772
2188 p->w->pending = 0; 3773 p->w->pending = 0;
2189 EV_CB_INVOKE (p->w, p->events); 3774 EV_CB_INVOKE (p->w, p->events);
2190 EV_FREQUENT_CHECK; 3775 EV_FREQUENT_CHECK;
2191 } 3776 }
3777 }
3778 while (pendingpri);
2192} 3779}
2193 3780
2194#if EV_IDLE_ENABLE 3781#if EV_IDLE_ENABLE
2195/* make idle watchers pending. this handles the "call-idle */ 3782/* make idle watchers pending. this handles the "call-idle */
2196/* only when higher priorities are idle" logic */ 3783/* only when higher priorities are idle" logic */
2197inline_size void 3784inline_size void
2198idle_reify (EV_P) 3785idle_reify (EV_P)
2199{ 3786{
2200 if (expect_false (idleall)) 3787 if (ecb_expect_false (idleall))
2201 { 3788 {
2202 int pri; 3789 int pri;
2203 3790
2204 for (pri = NUMPRI; pri--; ) 3791 for (pri = NUMPRI; pri--; )
2205 { 3792 {
… …
2235 { 3822 {
2236 ev_at (w) += w->repeat; 3823 ev_at (w) += w->repeat;
2237 if (ev_at (w) < mn_now) 3824 if (ev_at (w) < mn_now)
2238 ev_at (w) = mn_now; 3825 ev_at (w) = mn_now;
2239 3826
2240 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.)));
2241 3828
2242 ANHE_at_cache (timers [HEAP0]); 3829 ANHE_at_cache (timers [HEAP0]);
2243 downheap (timers, timercnt, HEAP0); 3830 downheap (timers, timercnt, HEAP0);
2244 } 3831 }
2245 else 3832 else
… …
2254 } 3841 }
2255} 3842}
2256 3843
2257#if EV_PERIODIC_ENABLE 3844#if EV_PERIODIC_ENABLE
2258 3845
2259static void noinline 3846ecb_noinline
3847static void
2260periodic_recalc (EV_P_ ev_periodic *w) 3848periodic_recalc (EV_P_ ev_periodic *w)
2261{ 3849{
2262 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; 3850 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2263 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);
2264 3852
… …
2266 while (at <= ev_rt_now) 3854 while (at <= ev_rt_now)
2267 { 3855 {
2268 ev_tstamp nat = at + w->interval; 3856 ev_tstamp nat = at + w->interval;
2269 3857
2270 /* when resolution fails us, we use ev_rt_now */ 3858 /* when resolution fails us, we use ev_rt_now */
2271 if (expect_false (nat == at)) 3859 if (ecb_expect_false (nat == at))
2272 { 3860 {
2273 at = ev_rt_now; 3861 at = ev_rt_now;
2274 break; 3862 break;
2275 } 3863 }
2276 3864
… …
2286{ 3874{
2287 EV_FREQUENT_CHECK; 3875 EV_FREQUENT_CHECK;
2288 3876
2289 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3877 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2290 { 3878 {
2291 int feed_count = 0;
2292
2293 do 3879 do
2294 { 3880 {
2295 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3881 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2296 3882
2297 /*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)));*/
… …
2324 } 3910 }
2325} 3911}
2326 3912
2327/* simply recalculate all periodics */ 3913/* simply recalculate all periodics */
2328/* 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? */
2329static void noinline 3915ecb_noinline ecb_cold
3916static void
2330periodics_reschedule (EV_P) 3917periodics_reschedule (EV_P)
2331{ 3918{
2332 int i; 3919 int i;
2333 3920
2334 /* adjust periodics after time jump */ 3921 /* adjust periodics after time jump */
… …
2347 reheap (periodics, periodiccnt); 3934 reheap (periodics, periodiccnt);
2348} 3935}
2349#endif 3936#endif
2350 3937
2351/* adjust all timers by a given offset */ 3938/* adjust all timers by a given offset */
2352static void noinline 3939ecb_noinline ecb_cold
3940static void
2353timers_reschedule (EV_P_ ev_tstamp adjust) 3941timers_reschedule (EV_P_ ev_tstamp adjust)
2354{ 3942{
2355 int i; 3943 int i;
2356 3944
2357 for (i = 0; i < timercnt; ++i) 3945 for (i = 0; i < timercnt; ++i)
… …
2366/* also detect if there was a timejump, and act accordingly */ 3954/* also detect if there was a timejump, and act accordingly */
2367inline_speed void 3955inline_speed void
2368time_update (EV_P_ ev_tstamp max_block) 3956time_update (EV_P_ ev_tstamp max_block)
2369{ 3957{
2370#if EV_USE_MONOTONIC 3958#if EV_USE_MONOTONIC
2371 if (expect_true (have_monotonic)) 3959 if (ecb_expect_true (have_monotonic))
2372 { 3960 {
2373 int i; 3961 int i;
2374 ev_tstamp odiff = rtmn_diff; 3962 ev_tstamp odiff = rtmn_diff;
2375 3963
2376 mn_now = get_clock (); 3964 mn_now = get_clock ();
2377 3965
2378 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3966 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2379 /* interpolate in the meantime */ 3967 /* interpolate in the meantime */
2380 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)))
2381 { 3969 {
2382 ev_rt_now = rtmn_diff + mn_now; 3970 ev_rt_now = rtmn_diff + mn_now;
2383 return; 3971 return;
2384 } 3972 }
2385 3973
… …
2399 ev_tstamp diff; 3987 ev_tstamp diff;
2400 rtmn_diff = ev_rt_now - mn_now; 3988 rtmn_diff = ev_rt_now - mn_now;
2401 3989
2402 diff = odiff - rtmn_diff; 3990 diff = odiff - rtmn_diff;
2403 3991
2404 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)))
2405 return; /* all is well */ 3993 return; /* all is well */
2406 3994
2407 ev_rt_now = ev_time (); 3995 ev_rt_now = ev_time ();
2408 mn_now = get_clock (); 3996 mn_now = get_clock ();
2409 now_floor = mn_now; 3997 now_floor = mn_now;
… …
2418 else 4006 else
2419#endif 4007#endif
2420 { 4008 {
2421 ev_rt_now = ev_time (); 4009 ev_rt_now = ev_time ();
2422 4010
2423 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)))
2424 { 4012 {
2425 /* 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 */
2426 timers_reschedule (EV_A_ ev_rt_now - mn_now); 4014 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2427#if EV_PERIODIC_ENABLE 4015#if EV_PERIODIC_ENABLE
2428 periodics_reschedule (EV_A); 4016 periodics_reschedule (EV_A);
… …
2431 4019
2432 mn_now = ev_rt_now; 4020 mn_now = ev_rt_now;
2433 } 4021 }
2434} 4022}
2435 4023
2436void 4024int
2437ev_run (EV_P_ int flags) 4025ev_run (EV_P_ int flags)
2438{ 4026{
2439#if EV_FEATURE_API 4027#if EV_FEATURE_API
2440 ++loop_depth; 4028 ++loop_depth;
2441#endif 4029#endif
… …
2451#if EV_VERIFY >= 2 4039#if EV_VERIFY >= 2
2452 ev_verify (EV_A); 4040 ev_verify (EV_A);
2453#endif 4041#endif
2454 4042
2455#ifndef _WIN32 4043#ifndef _WIN32
2456 if (expect_false (curpid)) /* penalise the forking check even more */ 4044 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2457 if (expect_false (getpid () != curpid)) 4045 if (ecb_expect_false (getpid () != curpid))
2458 { 4046 {
2459 curpid = getpid (); 4047 curpid = getpid ();
2460 postfork = 1; 4048 postfork = 1;
2461 } 4049 }
2462#endif 4050#endif
2463 4051
2464#if EV_FORK_ENABLE 4052#if EV_FORK_ENABLE
2465 /* we might have forked, so queue fork handlers */ 4053 /* we might have forked, so queue fork handlers */
2466 if (expect_false (postfork)) 4054 if (ecb_expect_false (postfork))
2467 if (forkcnt) 4055 if (forkcnt)
2468 { 4056 {
2469 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 4057 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2470 EV_INVOKE_PENDING; 4058 EV_INVOKE_PENDING;
2471 } 4059 }
2472#endif 4060#endif
2473 4061
2474#if EV_PREPARE_ENABLE 4062#if EV_PREPARE_ENABLE
2475 /* queue prepare watchers (and execute them) */ 4063 /* queue prepare watchers (and execute them) */
2476 if (expect_false (preparecnt)) 4064 if (ecb_expect_false (preparecnt))
2477 { 4065 {
2478 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 4066 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2479 EV_INVOKE_PENDING; 4067 EV_INVOKE_PENDING;
2480 } 4068 }
2481#endif 4069#endif
2482 4070
2483 if (expect_false (loop_done)) 4071 if (ecb_expect_false (loop_done))
2484 break; 4072 break;
2485 4073
2486 /* we might have forked, so reify kernel state if necessary */ 4074 /* we might have forked, so reify kernel state if necessary */
2487 if (expect_false (postfork)) 4075 if (ecb_expect_false (postfork))
2488 loop_fork (EV_A); 4076 loop_fork (EV_A);
2489 4077
2490 /* update fd-related kernel structures */ 4078 /* update fd-related kernel structures */
2491 fd_reify (EV_A); 4079 fd_reify (EV_A);
2492 4080
… …
2497 4085
2498 /* remember old timestamp for io_blocktime calculation */ 4086 /* remember old timestamp for io_blocktime calculation */
2499 ev_tstamp prev_mn_now = mn_now; 4087 ev_tstamp prev_mn_now = mn_now;
2500 4088
2501 /* update time to cancel out callback processing overhead */ 4089 /* update time to cancel out callback processing overhead */
2502 time_update (EV_A_ 1e100); 4090 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
2503 4091
4092 /* from now on, we want a pipe-wake-up */
4093 pipe_write_wanted = 1;
4094
4095 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
4096
2504 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 4097 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2505 { 4098 {
2506 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
2507 4116
2508 if (timercnt) 4117 if (timercnt)
2509 { 4118 {
2510 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 4119 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2511 if (waittime > to) waittime = to; 4120 if (waittime > to) waittime = to;
… …
2518 if (waittime > to) waittime = to; 4127 if (waittime > to) waittime = to;
2519 } 4128 }
2520#endif 4129#endif
2521 4130
2522 /* don't let timeouts decrease the waittime below timeout_blocktime */ 4131 /* don't let timeouts decrease the waittime below timeout_blocktime */
2523 if (expect_false (waittime < timeout_blocktime)) 4132 if (ecb_expect_false (waittime < timeout_blocktime))
2524 waittime = timeout_blocktime; 4133 waittime = timeout_blocktime;
2525 4134
2526 /* at this point, we NEED to wait, so we have to ensure */ 4135 /* now there are two more special cases left, either we have
2527 /* 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 */
2528 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.)
2529 waittime = backend_mintime; 4143 : backend_mintime;
2530 4144
2531 /* extra check because io_blocktime is commonly 0 */ 4145 /* extra check because io_blocktime is commonly 0 */
2532 if (expect_false (io_blocktime)) 4146 if (ecb_expect_false (io_blocktime))
2533 { 4147 {
2534 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4148 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2535 4149
2536 if (sleeptime > waittime - backend_mintime) 4150 if (sleeptime > waittime - backend_mintime)
2537 sleeptime = waittime - backend_mintime; 4151 sleeptime = waittime - backend_mintime;
2538 4152
2539 if (expect_true (sleeptime > 0.)) 4153 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2540 { 4154 {
2541 ev_sleep (sleeptime); 4155 ev_sleep (sleeptime);
2542 waittime -= sleeptime; 4156 waittime -= sleeptime;
2543 } 4157 }
2544 } 4158 }
… …
2549#endif 4163#endif
2550 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 4164 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2551 backend_poll (EV_A_ waittime); 4165 backend_poll (EV_A_ waittime);
2552 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 4166 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2553 4167
4168 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
4169
4170 ECB_MEMORY_FENCE_ACQUIRE;
4171 if (pipe_write_skipped)
4172 {
4173 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
4174 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
4175 }
4176
2554 /* update ev_rt_now, do magic */ 4177 /* update ev_rt_now, do magic */
2555 time_update (EV_A_ waittime + sleeptime); 4178 time_update (EV_A_ waittime + sleeptime);
2556 } 4179 }
2557 4180
2558 /* queue pending timers and reschedule them */ 4181 /* queue pending timers and reschedule them */
… …
2566 idle_reify (EV_A); 4189 idle_reify (EV_A);
2567#endif 4190#endif
2568 4191
2569#if EV_CHECK_ENABLE 4192#if EV_CHECK_ENABLE
2570 /* queue check watchers, to be executed first */ 4193 /* queue check watchers, to be executed first */
2571 if (expect_false (checkcnt)) 4194 if (ecb_expect_false (checkcnt))
2572 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4195 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2573#endif 4196#endif
2574 4197
2575 EV_INVOKE_PENDING; 4198 EV_INVOKE_PENDING;
2576 } 4199 }
2577 while (expect_true ( 4200 while (ecb_expect_true (
2578 activecnt 4201 activecnt
2579 && !loop_done 4202 && !loop_done
2580 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) 4203 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2581 )); 4204 ));
2582 4205
… …
2584 loop_done = EVBREAK_CANCEL; 4207 loop_done = EVBREAK_CANCEL;
2585 4208
2586#if EV_FEATURE_API 4209#if EV_FEATURE_API
2587 --loop_depth; 4210 --loop_depth;
2588#endif 4211#endif
4212
4213 return activecnt;
2589} 4214}
2590 4215
2591void 4216void
2592ev_break (EV_P_ int how) 4217ev_break (EV_P_ int how) EV_NOEXCEPT
2593{ 4218{
2594 loop_done = how; 4219 loop_done = how;
2595} 4220}
2596 4221
2597void 4222void
2598ev_ref (EV_P) 4223ev_ref (EV_P) EV_NOEXCEPT
2599{ 4224{
2600 ++activecnt; 4225 ++activecnt;
2601} 4226}
2602 4227
2603void 4228void
2604ev_unref (EV_P) 4229ev_unref (EV_P) EV_NOEXCEPT
2605{ 4230{
2606 --activecnt; 4231 --activecnt;
2607} 4232}
2608 4233
2609void 4234void
2610ev_now_update (EV_P) 4235ev_now_update (EV_P) EV_NOEXCEPT
2611{ 4236{
2612 time_update (EV_A_ 1e100); 4237 time_update (EV_A_ EV_TSTAMP_HUGE);
2613} 4238}
2614 4239
2615void 4240void
2616ev_suspend (EV_P) 4241ev_suspend (EV_P) EV_NOEXCEPT
2617{ 4242{
2618 ev_now_update (EV_A); 4243 ev_now_update (EV_A);
2619} 4244}
2620 4245
2621void 4246void
2622ev_resume (EV_P) 4247ev_resume (EV_P) EV_NOEXCEPT
2623{ 4248{
2624 ev_tstamp mn_prev = mn_now; 4249 ev_tstamp mn_prev = mn_now;
2625 4250
2626 ev_now_update (EV_A); 4251 ev_now_update (EV_A);
2627 timers_reschedule (EV_A_ mn_now - mn_prev); 4252 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2644inline_size void 4269inline_size void
2645wlist_del (WL *head, WL elem) 4270wlist_del (WL *head, WL elem)
2646{ 4271{
2647 while (*head) 4272 while (*head)
2648 { 4273 {
2649 if (expect_true (*head == elem)) 4274 if (ecb_expect_true (*head == elem))
2650 { 4275 {
2651 *head = elem->next; 4276 *head = elem->next;
2652 break; 4277 break;
2653 } 4278 }
2654 4279
… …
2666 w->pending = 0; 4291 w->pending = 0;
2667 } 4292 }
2668} 4293}
2669 4294
2670int 4295int
2671ev_clear_pending (EV_P_ void *w) 4296ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2672{ 4297{
2673 W w_ = (W)w; 4298 W w_ = (W)w;
2674 int pending = w_->pending; 4299 int pending = w_->pending;
2675 4300
2676 if (expect_true (pending)) 4301 if (ecb_expect_true (pending))
2677 { 4302 {
2678 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4303 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2679 p->w = (W)&pending_w; 4304 p->w = (W)&pending_w;
2680 w_->pending = 0; 4305 w_->pending = 0;
2681 return p->events; 4306 return p->events;
… …
2708 w->active = 0; 4333 w->active = 0;
2709} 4334}
2710 4335
2711/*****************************************************************************/ 4336/*****************************************************************************/
2712 4337
2713void noinline 4338ecb_noinline
4339void
2714ev_io_start (EV_P_ ev_io *w) 4340ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2715{ 4341{
2716 int fd = w->fd; 4342 int fd = w->fd;
2717 4343
2718 if (expect_false (ev_is_active (w))) 4344 if (ecb_expect_false (ev_is_active (w)))
2719 return; 4345 return;
2720 4346
2721 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4347 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2722 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))));
2723 4349
4350#if EV_VERIFY >= 2
4351 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4352#endif
2724 EV_FREQUENT_CHECK; 4353 EV_FREQUENT_CHECK;
2725 4354
2726 ev_start (EV_A_ (W)w, 1); 4355 ev_start (EV_A_ (W)w, 1);
2727 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4356 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2728 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));
2729 4361
2730 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);
2731 w->events &= ~EV__IOFDSET; 4363 w->events &= ~EV__IOFDSET;
2732 4364
2733 EV_FREQUENT_CHECK; 4365 EV_FREQUENT_CHECK;
2734} 4366}
2735 4367
2736void noinline 4368ecb_noinline
4369void
2737ev_io_stop (EV_P_ ev_io *w) 4370ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2738{ 4371{
2739 clear_pending (EV_A_ (W)w); 4372 clear_pending (EV_A_ (W)w);
2740 if (expect_false (!ev_is_active (w))) 4373 if (ecb_expect_false (!ev_is_active (w)))
2741 return; 4374 return;
2742 4375
2743 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));
2744 4377
4378#if EV_VERIFY >= 2
4379 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4380#endif
2745 EV_FREQUENT_CHECK; 4381 EV_FREQUENT_CHECK;
2746 4382
2747 wlist_del (&anfds[w->fd].head, (WL)w); 4383 wlist_del (&anfds[w->fd].head, (WL)w);
2748 ev_stop (EV_A_ (W)w); 4384 ev_stop (EV_A_ (W)w);
2749 4385
2750 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 4386 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2751 4387
2752 EV_FREQUENT_CHECK; 4388 EV_FREQUENT_CHECK;
2753} 4389}
2754 4390
2755void noinline 4391ecb_noinline
4392void
2756ev_timer_start (EV_P_ ev_timer *w) 4393ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2757{ 4394{
2758 if (expect_false (ev_is_active (w))) 4395 if (ecb_expect_false (ev_is_active (w)))
2759 return; 4396 return;
2760 4397
2761 ev_at (w) += mn_now; 4398 ev_at (w) += mn_now;
2762 4399
2763 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.));
2764 4401
2765 EV_FREQUENT_CHECK; 4402 EV_FREQUENT_CHECK;
2766 4403
2767 ++timercnt; 4404 ++timercnt;
2768 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4405 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2769 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4406 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2770 ANHE_w (timers [ev_active (w)]) = (WT)w; 4407 ANHE_w (timers [ev_active (w)]) = (WT)w;
2771 ANHE_at_cache (timers [ev_active (w)]); 4408 ANHE_at_cache (timers [ev_active (w)]);
2772 upheap (timers, ev_active (w)); 4409 upheap (timers, ev_active (w));
2773 4410
2774 EV_FREQUENT_CHECK; 4411 EV_FREQUENT_CHECK;
2775 4412
2776 /*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));*/
2777} 4414}
2778 4415
2779void noinline 4416ecb_noinline
4417void
2780ev_timer_stop (EV_P_ ev_timer *w) 4418ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2781{ 4419{
2782 clear_pending (EV_A_ (W)w); 4420 clear_pending (EV_A_ (W)w);
2783 if (expect_false (!ev_is_active (w))) 4421 if (ecb_expect_false (!ev_is_active (w)))
2784 return; 4422 return;
2785 4423
2786 EV_FREQUENT_CHECK; 4424 EV_FREQUENT_CHECK;
2787 4425
2788 { 4426 {
… …
2790 4428
2791 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));
2792 4430
2793 --timercnt; 4431 --timercnt;
2794 4432
2795 if (expect_true (active < timercnt + HEAP0)) 4433 if (ecb_expect_true (active < timercnt + HEAP0))
2796 { 4434 {
2797 timers [active] = timers [timercnt + HEAP0]; 4435 timers [active] = timers [timercnt + HEAP0];
2798 adjustheap (timers, timercnt, active); 4436 adjustheap (timers, timercnt, active);
2799 } 4437 }
2800 } 4438 }
… …
2804 ev_stop (EV_A_ (W)w); 4442 ev_stop (EV_A_ (W)w);
2805 4443
2806 EV_FREQUENT_CHECK; 4444 EV_FREQUENT_CHECK;
2807} 4445}
2808 4446
2809void noinline 4447ecb_noinline
4448void
2810ev_timer_again (EV_P_ ev_timer *w) 4449ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2811{ 4450{
2812 EV_FREQUENT_CHECK; 4451 EV_FREQUENT_CHECK;
4452
4453 clear_pending (EV_A_ (W)w);
2813 4454
2814 if (ev_is_active (w)) 4455 if (ev_is_active (w))
2815 { 4456 {
2816 if (w->repeat) 4457 if (w->repeat)
2817 { 4458 {
… …
2830 4471
2831 EV_FREQUENT_CHECK; 4472 EV_FREQUENT_CHECK;
2832} 4473}
2833 4474
2834ev_tstamp 4475ev_tstamp
2835ev_timer_remaining (EV_P_ ev_timer *w) 4476ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2836{ 4477{
2837 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.));
2838} 4479}
2839 4480
2840#if EV_PERIODIC_ENABLE 4481#if EV_PERIODIC_ENABLE
2841void noinline 4482ecb_noinline
4483void
2842ev_periodic_start (EV_P_ ev_periodic *w) 4484ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2843{ 4485{
2844 if (expect_false (ev_is_active (w))) 4486 if (ecb_expect_false (ev_is_active (w)))
2845 return; 4487 return;
4488
4489#if EV_USE_TIMERFD
4490 if (timerfd == -2)
4491 evtimerfd_init (EV_A);
4492#endif
2846 4493
2847 if (w->reschedule_cb) 4494 if (w->reschedule_cb)
2848 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4495 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2849 else if (w->interval) 4496 else if (w->interval)
2850 { 4497 {
… …
2856 4503
2857 EV_FREQUENT_CHECK; 4504 EV_FREQUENT_CHECK;
2858 4505
2859 ++periodiccnt; 4506 ++periodiccnt;
2860 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4507 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2861 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4508 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2862 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4509 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2863 ANHE_at_cache (periodics [ev_active (w)]); 4510 ANHE_at_cache (periodics [ev_active (w)]);
2864 upheap (periodics, ev_active (w)); 4511 upheap (periodics, ev_active (w));
2865 4512
2866 EV_FREQUENT_CHECK; 4513 EV_FREQUENT_CHECK;
2867 4514
2868 /*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));*/
2869} 4516}
2870 4517
2871void noinline 4518ecb_noinline
4519void
2872ev_periodic_stop (EV_P_ ev_periodic *w) 4520ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2873{ 4521{
2874 clear_pending (EV_A_ (W)w); 4522 clear_pending (EV_A_ (W)w);
2875 if (expect_false (!ev_is_active (w))) 4523 if (ecb_expect_false (!ev_is_active (w)))
2876 return; 4524 return;
2877 4525
2878 EV_FREQUENT_CHECK; 4526 EV_FREQUENT_CHECK;
2879 4527
2880 { 4528 {
… …
2882 4530
2883 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));
2884 4532
2885 --periodiccnt; 4533 --periodiccnt;
2886 4534
2887 if (expect_true (active < periodiccnt + HEAP0)) 4535 if (ecb_expect_true (active < periodiccnt + HEAP0))
2888 { 4536 {
2889 periodics [active] = periodics [periodiccnt + HEAP0]; 4537 periodics [active] = periodics [periodiccnt + HEAP0];
2890 adjustheap (periodics, periodiccnt, active); 4538 adjustheap (periodics, periodiccnt, active);
2891 } 4539 }
2892 } 4540 }
… …
2894 ev_stop (EV_A_ (W)w); 4542 ev_stop (EV_A_ (W)w);
2895 4543
2896 EV_FREQUENT_CHECK; 4544 EV_FREQUENT_CHECK;
2897} 4545}
2898 4546
2899void noinline 4547ecb_noinline
4548void
2900ev_periodic_again (EV_P_ ev_periodic *w) 4549ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2901{ 4550{
2902 /* TODO: use adjustheap and recalculation */ 4551 /* TODO: use adjustheap and recalculation */
2903 ev_periodic_stop (EV_A_ w); 4552 ev_periodic_stop (EV_A_ w);
2904 ev_periodic_start (EV_A_ w); 4553 ev_periodic_start (EV_A_ w);
2905} 4554}
… …
2909# define SA_RESTART 0 4558# define SA_RESTART 0
2910#endif 4559#endif
2911 4560
2912#if EV_SIGNAL_ENABLE 4561#if EV_SIGNAL_ENABLE
2913 4562
2914void noinline 4563ecb_noinline
4564void
2915ev_signal_start (EV_P_ ev_signal *w) 4565ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2916{ 4566{
2917 if (expect_false (ev_is_active (w))) 4567 if (ecb_expect_false (ev_is_active (w)))
2918 return; 4568 return;
2919 4569
2920 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));
2921 4571
2922#if EV_MULTIPLICITY 4572#if EV_MULTIPLICITY
2923 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",
2924 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4574 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2925 4575
2926 signals [w->signum - 1].loop = EV_A; 4576 signals [w->signum - 1].loop = EV_A;
4577 ECB_MEMORY_FENCE_RELEASE;
2927#endif 4578#endif
2928 4579
2929 EV_FREQUENT_CHECK; 4580 EV_FREQUENT_CHECK;
2930 4581
2931#if EV_USE_SIGNALFD 4582#if EV_USE_SIGNALFD
… …
2990 } 4641 }
2991 4642
2992 EV_FREQUENT_CHECK; 4643 EV_FREQUENT_CHECK;
2993} 4644}
2994 4645
2995void noinline 4646ecb_noinline
4647void
2996ev_signal_stop (EV_P_ ev_signal *w) 4648ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2997{ 4649{
2998 clear_pending (EV_A_ (W)w); 4650 clear_pending (EV_A_ (W)w);
2999 if (expect_false (!ev_is_active (w))) 4651 if (ecb_expect_false (!ev_is_active (w)))
3000 return; 4652 return;
3001 4653
3002 EV_FREQUENT_CHECK; 4654 EV_FREQUENT_CHECK;
3003 4655
3004 wlist_del (&signals [w->signum - 1].head, (WL)w); 4656 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
3032#endif 4684#endif
3033 4685
3034#if EV_CHILD_ENABLE 4686#if EV_CHILD_ENABLE
3035 4687
3036void 4688void
3037ev_child_start (EV_P_ ev_child *w) 4689ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
3038{ 4690{
3039#if EV_MULTIPLICITY 4691#if EV_MULTIPLICITY
3040 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));
3041#endif 4693#endif
3042 if (expect_false (ev_is_active (w))) 4694 if (ecb_expect_false (ev_is_active (w)))
3043 return; 4695 return;
3044 4696
3045 EV_FREQUENT_CHECK; 4697 EV_FREQUENT_CHECK;
3046 4698
3047 ev_start (EV_A_ (W)w, 1); 4699 ev_start (EV_A_ (W)w, 1);
… …
3049 4701
3050 EV_FREQUENT_CHECK; 4702 EV_FREQUENT_CHECK;
3051} 4703}
3052 4704
3053void 4705void
3054ev_child_stop (EV_P_ ev_child *w) 4706ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
3055{ 4707{
3056 clear_pending (EV_A_ (W)w); 4708 clear_pending (EV_A_ (W)w);
3057 if (expect_false (!ev_is_active (w))) 4709 if (ecb_expect_false (!ev_is_active (w)))
3058 return; 4710 return;
3059 4711
3060 EV_FREQUENT_CHECK; 4712 EV_FREQUENT_CHECK;
3061 4713
3062 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); 4714 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
… …
3076 4728
3077#define DEF_STAT_INTERVAL 5.0074891 4729#define DEF_STAT_INTERVAL 5.0074891
3078#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4730#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3079#define MIN_STAT_INTERVAL 0.1074891 4731#define MIN_STAT_INTERVAL 0.1074891
3080 4732
3081static 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);
3082 4734
3083#if EV_USE_INOTIFY 4735#if EV_USE_INOTIFY
3084 4736
3085/* 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 */
3086# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4738# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3087 4739
3088static void noinline 4740ecb_noinline
4741static void
3089infy_add (EV_P_ ev_stat *w) 4742infy_add (EV_P_ ev_stat *w)
3090{ 4743{
3091 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);
3092 4748
3093 if (w->wd >= 0) 4749 if (w->wd >= 0)
3094 { 4750 {
3095 struct statfs sfs; 4751 struct statfs sfs;
3096 4752
… …
3100 4756
3101 if (!fs_2625) 4757 if (!fs_2625)
3102 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4758 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3103 else if (!statfs (w->path, &sfs) 4759 else if (!statfs (w->path, &sfs)
3104 && (sfs.f_type == 0x1373 /* devfs */ 4760 && (sfs.f_type == 0x1373 /* devfs */
4761 || sfs.f_type == 0x4006 /* fat */
4762 || sfs.f_type == 0x4d44 /* msdos */
3105 || 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 */
3106 || sfs.f_type == 0x3153464a /* jfs */ 4767 || sfs.f_type == 0x3153464a /* jfs */
4768 || sfs.f_type == 0x9123683e /* btrfs */
3107 || sfs.f_type == 0x52654973 /* reiser3 */ 4769 || sfs.f_type == 0x52654973 /* reiser3 */
3108 || sfs.f_type == 0x01021994 /* tempfs */ 4770 || sfs.f_type == 0x01021994 /* tmpfs */
3109 || sfs.f_type == 0x58465342 /* xfs */)) 4771 || sfs.f_type == 0x58465342 /* xfs */))
3110 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4772 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3111 else 4773 else
3112 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 */
3113 } 4775 }
… …
3148 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4810 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3149 ev_timer_again (EV_A_ &w->timer); 4811 ev_timer_again (EV_A_ &w->timer);
3150 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4812 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3151} 4813}
3152 4814
3153static void noinline 4815ecb_noinline
4816static void
3154infy_del (EV_P_ ev_stat *w) 4817infy_del (EV_P_ ev_stat *w)
3155{ 4818{
3156 int slot; 4819 int slot;
3157 int wd = w->wd; 4820 int wd = w->wd;
3158 4821
… …
3165 4828
3166 /* remove this watcher, if others are watching it, they will rearm */ 4829 /* remove this watcher, if others are watching it, they will rearm */
3167 inotify_rm_watch (fs_fd, wd); 4830 inotify_rm_watch (fs_fd, wd);
3168} 4831}
3169 4832
3170static void noinline 4833ecb_noinline
4834static void
3171infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4835infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3172{ 4836{
3173 if (slot < 0) 4837 if (slot < 0)
3174 /* overflow, need to check for all hash slots */ 4838 /* overflow, need to check for all hash slots */
3175 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4839 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3211 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4875 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3212 ofs += sizeof (struct inotify_event) + ev->len; 4876 ofs += sizeof (struct inotify_event) + ev->len;
3213 } 4877 }
3214} 4878}
3215 4879
3216inline_size void 4880inline_size ecb_cold
4881void
3217ev_check_2625 (EV_P) 4882ev_check_2625 (EV_P)
3218{ 4883{
3219 /* kernels < 2.6.25 are borked 4884 /* kernels < 2.6.25 are borked
3220 * 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
3221 */ 4886 */
… …
3226} 4891}
3227 4892
3228inline_size int 4893inline_size int
3229infy_newfd (void) 4894infy_newfd (void)
3230{ 4895{
3231#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4896#if defined IN_CLOEXEC && defined IN_NONBLOCK
3232 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4897 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3233 if (fd >= 0) 4898 if (fd >= 0)
3234 return fd; 4899 return fd;
3235#endif 4900#endif
3236 return inotify_init (); 4901 return inotify_init ();
… …
3311#else 4976#else
3312# define EV_LSTAT(p,b) lstat (p, b) 4977# define EV_LSTAT(p,b) lstat (p, b)
3313#endif 4978#endif
3314 4979
3315void 4980void
3316ev_stat_stat (EV_P_ ev_stat *w) 4981ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3317{ 4982{
3318 if (lstat (w->path, &w->attr) < 0) 4983 if (lstat (w->path, &w->attr) < 0)
3319 w->attr.st_nlink = 0; 4984 w->attr.st_nlink = 0;
3320 else if (!w->attr.st_nlink) 4985 else if (!w->attr.st_nlink)
3321 w->attr.st_nlink = 1; 4986 w->attr.st_nlink = 1;
3322} 4987}
3323 4988
3324static void noinline 4989ecb_noinline
4990static void
3325stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4991stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3326{ 4992{
3327 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4993 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3328 4994
3329 ev_statdata prev = w->attr; 4995 ev_statdata prev = w->attr;
… …
3360 ev_feed_event (EV_A_ w, EV_STAT); 5026 ev_feed_event (EV_A_ w, EV_STAT);
3361 } 5027 }
3362} 5028}
3363 5029
3364void 5030void
3365ev_stat_start (EV_P_ ev_stat *w) 5031ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3366{ 5032{
3367 if (expect_false (ev_is_active (w))) 5033 if (ecb_expect_false (ev_is_active (w)))
3368 return; 5034 return;
3369 5035
3370 ev_stat_stat (EV_A_ w); 5036 ev_stat_stat (EV_A_ w);
3371 5037
3372 if (w->interval < MIN_STAT_INTERVAL && w->interval) 5038 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3391 5057
3392 EV_FREQUENT_CHECK; 5058 EV_FREQUENT_CHECK;
3393} 5059}
3394 5060
3395void 5061void
3396ev_stat_stop (EV_P_ ev_stat *w) 5062ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3397{ 5063{
3398 clear_pending (EV_A_ (W)w); 5064 clear_pending (EV_A_ (W)w);
3399 if (expect_false (!ev_is_active (w))) 5065 if (ecb_expect_false (!ev_is_active (w)))
3400 return; 5066 return;
3401 5067
3402 EV_FREQUENT_CHECK; 5068 EV_FREQUENT_CHECK;
3403 5069
3404#if EV_USE_INOTIFY 5070#if EV_USE_INOTIFY
… …
3417} 5083}
3418#endif 5084#endif
3419 5085
3420#if EV_IDLE_ENABLE 5086#if EV_IDLE_ENABLE
3421void 5087void
3422ev_idle_start (EV_P_ ev_idle *w) 5088ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3423{ 5089{
3424 if (expect_false (ev_is_active (w))) 5090 if (ecb_expect_false (ev_is_active (w)))
3425 return; 5091 return;
3426 5092
3427 pri_adjust (EV_A_ (W)w); 5093 pri_adjust (EV_A_ (W)w);
3428 5094
3429 EV_FREQUENT_CHECK; 5095 EV_FREQUENT_CHECK;
… …
3432 int active = ++idlecnt [ABSPRI (w)]; 5098 int active = ++idlecnt [ABSPRI (w)];
3433 5099
3434 ++idleall; 5100 ++idleall;
3435 ev_start (EV_A_ (W)w, active); 5101 ev_start (EV_A_ (W)w, active);
3436 5102
3437 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);
3438 idles [ABSPRI (w)][active - 1] = w; 5104 idles [ABSPRI (w)][active - 1] = w;
3439 } 5105 }
3440 5106
3441 EV_FREQUENT_CHECK; 5107 EV_FREQUENT_CHECK;
3442} 5108}
3443 5109
3444void 5110void
3445ev_idle_stop (EV_P_ ev_idle *w) 5111ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3446{ 5112{
3447 clear_pending (EV_A_ (W)w); 5113 clear_pending (EV_A_ (W)w);
3448 if (expect_false (!ev_is_active (w))) 5114 if (ecb_expect_false (!ev_is_active (w)))
3449 return; 5115 return;
3450 5116
3451 EV_FREQUENT_CHECK; 5117 EV_FREQUENT_CHECK;
3452 5118
3453 { 5119 {
… …
3464} 5130}
3465#endif 5131#endif
3466 5132
3467#if EV_PREPARE_ENABLE 5133#if EV_PREPARE_ENABLE
3468void 5134void
3469ev_prepare_start (EV_P_ ev_prepare *w) 5135ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3470{ 5136{
3471 if (expect_false (ev_is_active (w))) 5137 if (ecb_expect_false (ev_is_active (w)))
3472 return; 5138 return;
3473 5139
3474 EV_FREQUENT_CHECK; 5140 EV_FREQUENT_CHECK;
3475 5141
3476 ev_start (EV_A_ (W)w, ++preparecnt); 5142 ev_start (EV_A_ (W)w, ++preparecnt);
3477 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 5143 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3478 prepares [preparecnt - 1] = w; 5144 prepares [preparecnt - 1] = w;
3479 5145
3480 EV_FREQUENT_CHECK; 5146 EV_FREQUENT_CHECK;
3481} 5147}
3482 5148
3483void 5149void
3484ev_prepare_stop (EV_P_ ev_prepare *w) 5150ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3485{ 5151{
3486 clear_pending (EV_A_ (W)w); 5152 clear_pending (EV_A_ (W)w);
3487 if (expect_false (!ev_is_active (w))) 5153 if (ecb_expect_false (!ev_is_active (w)))
3488 return; 5154 return;
3489 5155
3490 EV_FREQUENT_CHECK; 5156 EV_FREQUENT_CHECK;
3491 5157
3492 { 5158 {
… …
3502} 5168}
3503#endif 5169#endif
3504 5170
3505#if EV_CHECK_ENABLE 5171#if EV_CHECK_ENABLE
3506void 5172void
3507ev_check_start (EV_P_ ev_check *w) 5173ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3508{ 5174{
3509 if (expect_false (ev_is_active (w))) 5175 if (ecb_expect_false (ev_is_active (w)))
3510 return; 5176 return;
3511 5177
3512 EV_FREQUENT_CHECK; 5178 EV_FREQUENT_CHECK;
3513 5179
3514 ev_start (EV_A_ (W)w, ++checkcnt); 5180 ev_start (EV_A_ (W)w, ++checkcnt);
3515 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5181 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3516 checks [checkcnt - 1] = w; 5182 checks [checkcnt - 1] = w;
3517 5183
3518 EV_FREQUENT_CHECK; 5184 EV_FREQUENT_CHECK;
3519} 5185}
3520 5186
3521void 5187void
3522ev_check_stop (EV_P_ ev_check *w) 5188ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3523{ 5189{
3524 clear_pending (EV_A_ (W)w); 5190 clear_pending (EV_A_ (W)w);
3525 if (expect_false (!ev_is_active (w))) 5191 if (ecb_expect_false (!ev_is_active (w)))
3526 return; 5192 return;
3527 5193
3528 EV_FREQUENT_CHECK; 5194 EV_FREQUENT_CHECK;
3529 5195
3530 { 5196 {
… …
3539 EV_FREQUENT_CHECK; 5205 EV_FREQUENT_CHECK;
3540} 5206}
3541#endif 5207#endif
3542 5208
3543#if EV_EMBED_ENABLE 5209#if EV_EMBED_ENABLE
3544void noinline 5210ecb_noinline
5211void
3545ev_embed_sweep (EV_P_ ev_embed *w) 5212ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3546{ 5213{
3547 ev_run (w->other, EVRUN_NOWAIT); 5214 ev_run (w->other, EVRUN_NOWAIT);
3548} 5215}
3549 5216
3550static void 5217static void
… …
3572 ev_run (EV_A_ EVRUN_NOWAIT); 5239 ev_run (EV_A_ EVRUN_NOWAIT);
3573 } 5240 }
3574 } 5241 }
3575} 5242}
3576 5243
5244#if EV_FORK_ENABLE
3577static void 5245static void
3578embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5246embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3579{ 5247{
3580 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));
3581 5249
… …
3588 ev_run (EV_A_ EVRUN_NOWAIT); 5256 ev_run (EV_A_ EVRUN_NOWAIT);
3589 } 5257 }
3590 5258
3591 ev_embed_start (EV_A_ w); 5259 ev_embed_start (EV_A_ w);
3592} 5260}
5261#endif
3593 5262
3594#if 0 5263#if 0
3595static void 5264static void
3596embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5265embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3597{ 5266{
3598 ev_idle_stop (EV_A_ idle); 5267 ev_idle_stop (EV_A_ idle);
3599} 5268}
3600#endif 5269#endif
3601 5270
3602void 5271void
3603ev_embed_start (EV_P_ ev_embed *w) 5272ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3604{ 5273{
3605 if (expect_false (ev_is_active (w))) 5274 if (ecb_expect_false (ev_is_active (w)))
3606 return; 5275 return;
3607 5276
3608 { 5277 {
3609 EV_P = w->other; 5278 EV_P = w->other;
3610 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 ()));
… …
3618 5287
3619 ev_prepare_init (&w->prepare, embed_prepare_cb); 5288 ev_prepare_init (&w->prepare, embed_prepare_cb);
3620 ev_set_priority (&w->prepare, EV_MINPRI); 5289 ev_set_priority (&w->prepare, EV_MINPRI);
3621 ev_prepare_start (EV_A_ &w->prepare); 5290 ev_prepare_start (EV_A_ &w->prepare);
3622 5291
5292#if EV_FORK_ENABLE
3623 ev_fork_init (&w->fork, embed_fork_cb); 5293 ev_fork_init (&w->fork, embed_fork_cb);
3624 ev_fork_start (EV_A_ &w->fork); 5294 ev_fork_start (EV_A_ &w->fork);
5295#endif
3625 5296
3626 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5297 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3627 5298
3628 ev_start (EV_A_ (W)w, 1); 5299 ev_start (EV_A_ (W)w, 1);
3629 5300
3630 EV_FREQUENT_CHECK; 5301 EV_FREQUENT_CHECK;
3631} 5302}
3632 5303
3633void 5304void
3634ev_embed_stop (EV_P_ ev_embed *w) 5305ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3635{ 5306{
3636 clear_pending (EV_A_ (W)w); 5307 clear_pending (EV_A_ (W)w);
3637 if (expect_false (!ev_is_active (w))) 5308 if (ecb_expect_false (!ev_is_active (w)))
3638 return; 5309 return;
3639 5310
3640 EV_FREQUENT_CHECK; 5311 EV_FREQUENT_CHECK;
3641 5312
3642 ev_io_stop (EV_A_ &w->io); 5313 ev_io_stop (EV_A_ &w->io);
3643 ev_prepare_stop (EV_A_ &w->prepare); 5314 ev_prepare_stop (EV_A_ &w->prepare);
5315#if EV_FORK_ENABLE
3644 ev_fork_stop (EV_A_ &w->fork); 5316 ev_fork_stop (EV_A_ &w->fork);
5317#endif
3645 5318
3646 ev_stop (EV_A_ (W)w); 5319 ev_stop (EV_A_ (W)w);
3647 5320
3648 EV_FREQUENT_CHECK; 5321 EV_FREQUENT_CHECK;
3649} 5322}
3650#endif 5323#endif
3651 5324
3652#if EV_FORK_ENABLE 5325#if EV_FORK_ENABLE
3653void 5326void
3654ev_fork_start (EV_P_ ev_fork *w) 5327ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3655{ 5328{
3656 if (expect_false (ev_is_active (w))) 5329 if (ecb_expect_false (ev_is_active (w)))
3657 return; 5330 return;
3658 5331
3659 EV_FREQUENT_CHECK; 5332 EV_FREQUENT_CHECK;
3660 5333
3661 ev_start (EV_A_ (W)w, ++forkcnt); 5334 ev_start (EV_A_ (W)w, ++forkcnt);
3662 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5335 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3663 forks [forkcnt - 1] = w; 5336 forks [forkcnt - 1] = w;
3664 5337
3665 EV_FREQUENT_CHECK; 5338 EV_FREQUENT_CHECK;
3666} 5339}
3667 5340
3668void 5341void
3669ev_fork_stop (EV_P_ ev_fork *w) 5342ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3670{ 5343{
3671 clear_pending (EV_A_ (W)w); 5344 clear_pending (EV_A_ (W)w);
3672 if (expect_false (!ev_is_active (w))) 5345 if (ecb_expect_false (!ev_is_active (w)))
3673 return; 5346 return;
3674 5347
3675 EV_FREQUENT_CHECK; 5348 EV_FREQUENT_CHECK;
3676 5349
3677 { 5350 {
… …
3687} 5360}
3688#endif 5361#endif
3689 5362
3690#if EV_CLEANUP_ENABLE 5363#if EV_CLEANUP_ENABLE
3691void 5364void
3692ev_cleanup_start (EV_P_ ev_cleanup *w) 5365ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3693{ 5366{
3694 if (expect_false (ev_is_active (w))) 5367 if (ecb_expect_false (ev_is_active (w)))
3695 return; 5368 return;
3696 5369
3697 EV_FREQUENT_CHECK; 5370 EV_FREQUENT_CHECK;
3698 5371
3699 ev_start (EV_A_ (W)w, ++cleanupcnt); 5372 ev_start (EV_A_ (W)w, ++cleanupcnt);
3700 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); 5373 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3701 cleanups [cleanupcnt - 1] = w; 5374 cleanups [cleanupcnt - 1] = w;
3702 5375
3703 /* cleanup watchers should never keep a refcount on the loop */ 5376 /* cleanup watchers should never keep a refcount on the loop */
3704 ev_unref (EV_A); 5377 ev_unref (EV_A);
3705 EV_FREQUENT_CHECK; 5378 EV_FREQUENT_CHECK;
3706} 5379}
3707 5380
3708void 5381void
3709ev_cleanup_stop (EV_P_ ev_cleanup *w) 5382ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3710{ 5383{
3711 clear_pending (EV_A_ (W)w); 5384 clear_pending (EV_A_ (W)w);
3712 if (expect_false (!ev_is_active (w))) 5385 if (ecb_expect_false (!ev_is_active (w)))
3713 return; 5386 return;
3714 5387
3715 EV_FREQUENT_CHECK; 5388 EV_FREQUENT_CHECK;
3716 ev_ref (EV_A); 5389 ev_ref (EV_A);
3717 5390
… …
3728} 5401}
3729#endif 5402#endif
3730 5403
3731#if EV_ASYNC_ENABLE 5404#if EV_ASYNC_ENABLE
3732void 5405void
3733ev_async_start (EV_P_ ev_async *w) 5406ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3734{ 5407{
3735 if (expect_false (ev_is_active (w))) 5408 if (ecb_expect_false (ev_is_active (w)))
3736 return; 5409 return;
3737 5410
3738 w->sent = 0; 5411 w->sent = 0;
3739 5412
3740 evpipe_init (EV_A); 5413 evpipe_init (EV_A);
3741 5414
3742 EV_FREQUENT_CHECK; 5415 EV_FREQUENT_CHECK;
3743 5416
3744 ev_start (EV_A_ (W)w, ++asynccnt); 5417 ev_start (EV_A_ (W)w, ++asynccnt);
3745 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5418 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3746 asyncs [asynccnt - 1] = w; 5419 asyncs [asynccnt - 1] = w;
3747 5420
3748 EV_FREQUENT_CHECK; 5421 EV_FREQUENT_CHECK;
3749} 5422}
3750 5423
3751void 5424void
3752ev_async_stop (EV_P_ ev_async *w) 5425ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3753{ 5426{
3754 clear_pending (EV_A_ (W)w); 5427 clear_pending (EV_A_ (W)w);
3755 if (expect_false (!ev_is_active (w))) 5428 if (ecb_expect_false (!ev_is_active (w)))
3756 return; 5429 return;
3757 5430
3758 EV_FREQUENT_CHECK; 5431 EV_FREQUENT_CHECK;
3759 5432
3760 { 5433 {
… …
3768 5441
3769 EV_FREQUENT_CHECK; 5442 EV_FREQUENT_CHECK;
3770} 5443}
3771 5444
3772void 5445void
3773ev_async_send (EV_P_ ev_async *w) 5446ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3774{ 5447{
3775 w->sent = 1; 5448 w->sent = 1;
3776 evpipe_write (EV_A_ &async_pending); 5449 evpipe_write (EV_A_ &async_pending);
3777} 5450}
3778#endif 5451#endif
… …
3815 5488
3816 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));
3817} 5490}
3818 5491
3819void 5492void
3820ev_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
3821{ 5494{
3822 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));
3823
3824 if (expect_false (!once))
3825 {
3826 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3827 return;
3828 }
3829 5496
3830 once->cb = cb; 5497 once->cb = cb;
3831 once->arg = arg; 5498 once->arg = arg;
3832 5499
3833 ev_init (&once->io, once_cb_io); 5500 ev_init (&once->io, once_cb_io);
… …
3846} 5513}
3847 5514
3848/*****************************************************************************/ 5515/*****************************************************************************/
3849 5516
3850#if EV_WALK_ENABLE 5517#if EV_WALK_ENABLE
5518ecb_cold
3851void 5519void
3852ev_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
3853{ 5521{
3854 int i, j; 5522 int i, j;
3855 ev_watcher_list *wl, *wn; 5523 ev_watcher_list *wl, *wn;
3856 5524
3857 if (types & (EV_IO | EV_EMBED)) 5525 if (types & (EV_IO | EV_EMBED))
… …
3900 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5568 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3901#endif 5569#endif
3902 5570
3903#if EV_IDLE_ENABLE 5571#if EV_IDLE_ENABLE
3904 if (types & EV_IDLE) 5572 if (types & EV_IDLE)
3905 for (j = NUMPRI; i--; ) 5573 for (j = NUMPRI; j--; )
3906 for (i = idlecnt [j]; i--; ) 5574 for (i = idlecnt [j]; i--; )
3907 cb (EV_A_ EV_IDLE, idles [j][i]); 5575 cb (EV_A_ EV_IDLE, idles [j][i]);
3908#endif 5576#endif
3909 5577
3910#if EV_FORK_ENABLE 5578#if EV_FORK_ENABLE
… …
3963 5631
3964#if EV_MULTIPLICITY 5632#if EV_MULTIPLICITY
3965 #include "ev_wrap.h" 5633 #include "ev_wrap.h"
3966#endif 5634#endif
3967 5635
3968EV_CPP(})
3969

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