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Comparing libev/ev.c (file contents):
Revision 1.380 by root, Mon Jun 27 19:20:01 2011 UTC vs.
Revision 1.525 by root, Wed Jan 22 14:09:07 2020 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) 2007-2019 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 *
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48#if HAVE_FLOOR 48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR 49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1 50# define EV_USE_FLOOR 1
51# endif
51# endif 52# endif
52#endif
53 53
54# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
59# endif 59# endif
60# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
62# endif 62# endif
63# endif 63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
66# endif 66# endif
67 67
68# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
115# else 115# else
116# undef EV_USE_EPOLL 116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0 117# define EV_USE_EPOLL 0
118# endif 118# endif
119 119
120# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */
123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
127# endif
128
129# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
130# ifndef EV_USE_IOURING
131# define EV_USE_IOURING EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_IOURING
135# define EV_USE_IOURING 0
136# endif
137
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 138# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE 139# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 140# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif 141# endif
124# else 142# else
… …
159# endif 177# endif
160# else 178# else
161# undef EV_USE_EVENTFD 179# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0 180# define EV_USE_EVENTFD 0
163# endif 181# endif
164 182
183# if HAVE_SYS_TIMERFD_H
184# ifndef EV_USE_TIMERFD
185# define EV_USE_TIMERFD EV_FEATURE_OS
186# endif
187# else
188# undef EV_USE_TIMERFD
189# define EV_USE_TIMERFD 0
165#endif 190# endif
191
192#endif
193
194/* OS X, in its infinite idiocy, actually HARDCODES
195 * a limit of 1024 into their select. Where people have brains,
196 * OS X engineers apparently have a vacuum. Or maybe they were
197 * ordered to have a vacuum, or they do anything for money.
198 * This might help. Or not.
199 * Note that this must be defined early, as other include files
200 * will rely on this define as well.
201 */
202#define _DARWIN_UNLIMITED_SELECT 1
166 203
167#include <stdlib.h> 204#include <stdlib.h>
168#include <string.h> 205#include <string.h>
169#include <fcntl.h> 206#include <fcntl.h>
170#include <stddef.h> 207#include <stddef.h>
… …
183# include EV_H 220# include EV_H
184#else 221#else
185# include "ev.h" 222# include "ev.h"
186#endif 223#endif
187 224
188EV_CPP(extern "C" {) 225#if EV_NO_THREADS
226# undef EV_NO_SMP
227# define EV_NO_SMP 1
228# undef ECB_NO_THREADS
229# define ECB_NO_THREADS 1
230#endif
231#if EV_NO_SMP
232# undef EV_NO_SMP
233# define ECB_NO_SMP 1
234#endif
189 235
190#ifndef _WIN32 236#ifndef _WIN32
191# include <sys/time.h> 237# include <sys/time.h>
192# include <sys/wait.h> 238# include <sys/wait.h>
193# include <unistd.h> 239# include <unistd.h>
194#else 240#else
195# include <io.h> 241# include <io.h>
196# define WIN32_LEAN_AND_MEAN 242# define WIN32_LEAN_AND_MEAN
243# include <winsock2.h>
197# include <windows.h> 244# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET 245# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1 246# define EV_SELECT_IS_WINSOCKET 1
200# endif 247# endif
201# undef EV_AVOID_STDIO 248# undef EV_AVOID_STDIO
202#endif 249#endif
203 250
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 */ 251/* this block tries to deduce configuration from header-defined symbols and defaults */
213 252
214/* try to deduce the maximum number of signals on this platform */ 253/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG) 254#if defined EV_NSIG
216/* use what's provided */ 255/* use what's provided */
217#elif defined (NSIG) 256#elif defined NSIG
218# define EV_NSIG (NSIG) 257# define EV_NSIG (NSIG)
219#elif defined(_NSIG) 258#elif defined _NSIG
220# define EV_NSIG (_NSIG) 259# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX) 260#elif defined SIGMAX
222# define EV_NSIG (SIGMAX+1) 261# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX) 262#elif defined SIG_MAX
224# define EV_NSIG (SIG_MAX+1) 263# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX) 264#elif defined _SIG_MAX
226# define EV_NSIG (_SIG_MAX+1) 265# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG) 266#elif defined MAXSIG
228# define EV_NSIG (MAXSIG+1) 267# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG) 268#elif defined MAX_SIG
230# define EV_NSIG (MAX_SIG+1) 269# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE) 270#elif defined SIGARRAYSIZE
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 271# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig) 272#elif defined _sys_nsig
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 273# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else 274#else
236# error "unable to find value for NSIG, please report" 275# 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 276#endif
241 277
242#ifndef EV_USE_FLOOR 278#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0 279# define EV_USE_FLOOR 0
244#endif 280#endif
245 281
246#ifndef EV_USE_CLOCK_SYSCALL 282#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2 283# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 284# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else 285# else
250# define EV_USE_CLOCK_SYSCALL 0 286# define EV_USE_CLOCK_SYSCALL 0
251# endif 287# endif
252#endif 288#endif
253 289
290#if !(_POSIX_TIMERS > 0)
291# ifndef EV_USE_MONOTONIC
292# define EV_USE_MONOTONIC 0
293# endif
294# ifndef EV_USE_REALTIME
295# define EV_USE_REALTIME 0
296# endif
297#endif
298
254#ifndef EV_USE_MONOTONIC 299#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 300# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS 301# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else 302# else
258# define EV_USE_MONOTONIC 0 303# define EV_USE_MONOTONIC 0
259# endif 304# endif
260#endif 305#endif
… …
297 342
298#ifndef EV_USE_PORT 343#ifndef EV_USE_PORT
299# define EV_USE_PORT 0 344# define EV_USE_PORT 0
300#endif 345#endif
301 346
347#ifndef EV_USE_LINUXAIO
348# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
349# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */
350# else
351# define EV_USE_LINUXAIO 0
352# endif
353#endif
354
355#ifndef EV_USE_IOURING
356# if __linux /* later checks might disable again */
357# define EV_USE_IOURING 1
358# else
359# define EV_USE_IOURING 0
360# endif
361#endif
362
302#ifndef EV_USE_INOTIFY 363#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 364# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS 365# define EV_USE_INOTIFY EV_FEATURE_OS
305# else 366# else
306# define EV_USE_INOTIFY 0 367# define EV_USE_INOTIFY 0
… …
329# else 390# else
330# define EV_USE_SIGNALFD 0 391# define EV_USE_SIGNALFD 0
331# endif 392# endif
332#endif 393#endif
333 394
395#ifndef EV_USE_TIMERFD
396# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8))
397# define EV_USE_TIMERFD EV_FEATURE_OS
398# else
399# define EV_USE_TIMERFD 0
400# endif
401#endif
402
334#if 0 /* debugging */ 403#if 0 /* debugging */
335# define EV_VERIFY 3 404# define EV_VERIFY 3
336# define EV_USE_4HEAP 1 405# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1 406# define EV_HEAP_CACHE_AT 1
338#endif 407#endif
… …
347 416
348#ifndef EV_HEAP_CACHE_AT 417#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 418# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif 419#endif
351 420
421#ifdef __ANDROID__
422/* supposedly, android doesn't typedef fd_mask */
423# undef EV_USE_SELECT
424# define EV_USE_SELECT 0
425/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
426# undef EV_USE_CLOCK_SYSCALL
427# define EV_USE_CLOCK_SYSCALL 0
428#endif
429
430/* aix's poll.h seems to cause lots of trouble */
431#ifdef _AIX
432/* AIX has a completely broken poll.h header */
433# undef EV_USE_POLL
434# define EV_USE_POLL 0
435#endif
436
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 437/* 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. */ 438/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL 439#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h> 440# include <sys/syscall.h>
356# ifdef SYS_clock_gettime 441# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 442# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC 443# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1 444# define EV_USE_MONOTONIC 1
445# define EV_NEED_SYSCALL 1
360# else 446# else
361# undef EV_USE_CLOCK_SYSCALL 447# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0 448# define EV_USE_CLOCK_SYSCALL 0
363# endif 449# endif
364#endif 450#endif
365 451
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 452/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367 453
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 454#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC 455# undef EV_USE_MONOTONIC
376# define EV_USE_MONOTONIC 0 456# define EV_USE_MONOTONIC 0
377#endif 457#endif
378 458
… …
384#if !EV_STAT_ENABLE 464#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY 465# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0 466# define EV_USE_INOTIFY 0
387#endif 467#endif
388 468
469#if __linux && EV_USE_IOURING
470# include <linux/version.h>
471# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
472# undef EV_USE_IOURING
473# define EV_USE_IOURING 0
474# endif
475#endif
476
389#if !EV_USE_NANOSLEEP 477#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */ 478/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux) 479# if !defined _WIN32 && !defined __hpux
392# include <sys/select.h> 480# include <sys/select.h>
481# endif
482#endif
483
484#if EV_USE_LINUXAIO
485# include <sys/syscall.h>
486# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
487# define EV_NEED_SYSCALL 1
488# else
489# undef EV_USE_LINUXAIO
490# define EV_USE_LINUXAIO 0
491# endif
492#endif
493
494#if EV_USE_IOURING
495# include <sys/syscall.h>
496# if !SYS_io_uring_setup && __linux && !__alpha
497# define SYS_io_uring_setup 425
498# define SYS_io_uring_enter 426
499# define SYS_io_uring_wregister 427
500# endif
501# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
502# define EV_NEED_SYSCALL 1
503# else
504# undef EV_USE_IOURING
505# define EV_USE_IOURING 0
393# endif 506# endif
394#endif 507#endif
395 508
396#if EV_USE_INOTIFY 509#if EV_USE_INOTIFY
397# include <sys/statfs.h> 510# include <sys/statfs.h>
… …
401# undef EV_USE_INOTIFY 514# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0 515# define EV_USE_INOTIFY 0
403# endif 516# endif
404#endif 517#endif
405 518
406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif
409
410#if EV_USE_EVENTFD 519#if EV_USE_EVENTFD
411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 520/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
412# include <stdint.h> 521# include <stdint.h>
413# ifndef EFD_NONBLOCK 522# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK 523# define EFD_NONBLOCK O_NONBLOCK
415# endif 524# endif
416# ifndef EFD_CLOEXEC 525# ifndef EFD_CLOEXEC
… …
422# endif 531# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); 532EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif 533#endif
425 534
426#if EV_USE_SIGNALFD 535#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 536/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
428# include <stdint.h> 537# include <stdint.h>
429# ifndef SFD_NONBLOCK 538# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK 539# define SFD_NONBLOCK O_NONBLOCK
431# endif 540# endif
432# ifndef SFD_CLOEXEC 541# ifndef SFD_CLOEXEC
… …
434# define SFD_CLOEXEC O_CLOEXEC 543# define SFD_CLOEXEC O_CLOEXEC
435# else 544# else
436# define SFD_CLOEXEC 02000000 545# define SFD_CLOEXEC 02000000
437# endif 546# endif
438# endif 547# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags); 548EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
440 549
441struct signalfd_siginfo 550struct signalfd_siginfo
442{ 551{
443 uint32_t ssi_signo; 552 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)]; 553 char pad[128 - sizeof (uint32_t)];
445}; 554};
446#endif 555#endif
447 556
448/**/ 557/* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */
558#if EV_USE_TIMERFD
559# include <sys/timerfd.h>
560/* timerfd is only used for periodics */
561# if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE
562# undef EV_USE_TIMERFD
563# define EV_USE_TIMERFD 0
564# endif
565#endif
566
567/*****************************************************************************/
449 568
450#if EV_VERIFY >= 3 569#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A) 570# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else 571#else
453# define EV_FREQUENT_CHECK do { } while (0) 572# define EV_FREQUENT_CHECK do { } while (0)
… …
458 * This value is good at least till the year 4000. 577 * This value is good at least till the year 4000.
459 */ 578 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ 579#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ 580/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
462 581
463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 582#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) */ 583#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
584#define MAX_BLOCKTIME2 1500001.07 /* same, but when timerfd is used to detect jumps, also safe delay to not overflow */
465 585
586/* find a portable timestamp that is "always" in the future but fits into time_t.
587 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
588 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
589#define EV_TSTAMP_HUGE \
590 (sizeof (time_t) >= 8 ? 10000000000000. \
591 : 0 < (time_t)4294967295 ? 4294967295. \
592 : 2147483647.) \
593
594#ifndef EV_TS_CONST
595# define EV_TS_CONST(nv) nv
596# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
597# 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) 598# 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) 599# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
600# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
601# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
602#endif
468 603
469/* the following are taken from libecb */ 604/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ecb.h start */ 605/* ECB.H BEGIN */
606/*
607 * libecb - http://software.schmorp.de/pkg/libecb
608 *
609 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
610 * Copyright (©) 2011 Emanuele Giaquinta
611 * All rights reserved.
612 *
613 * Redistribution and use in source and binary forms, with or without modifica-
614 * tion, are permitted provided that the following conditions are met:
615 *
616 * 1. Redistributions of source code must retain the above copyright notice,
617 * this list of conditions and the following disclaimer.
618 *
619 * 2. Redistributions in binary form must reproduce the above copyright
620 * notice, this list of conditions and the following disclaimer in the
621 * documentation and/or other materials provided with the distribution.
622 *
623 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
624 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
625 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
626 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
627 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
628 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
629 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
630 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
631 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
632 * OF THE POSSIBILITY OF SUCH DAMAGE.
633 *
634 * Alternatively, the contents of this file may be used under the terms of
635 * the GNU General Public License ("GPL") version 2 or any later version,
636 * in which case the provisions of the GPL are applicable instead of
637 * the above. If you wish to allow the use of your version of this file
638 * only under the terms of the GPL and not to allow others to use your
639 * version of this file under the BSD license, indicate your decision
640 * by deleting the provisions above and replace them with the notice
641 * and other provisions required by the GPL. If you do not delete the
642 * provisions above, a recipient may use your version of this file under
643 * either the BSD or the GPL.
644 */
645
646#ifndef ECB_H
647#define ECB_H
648
649/* 16 bits major, 16 bits minor */
650#define ECB_VERSION 0x00010008
651
652#include <string.h> /* for memcpy */
653
654#ifdef _WIN32
655 typedef signed char int8_t;
656 typedef unsigned char uint8_t;
657 typedef signed char int_fast8_t;
658 typedef unsigned char uint_fast8_t;
659 typedef signed short int16_t;
660 typedef unsigned short uint16_t;
661 typedef signed int int_fast16_t;
662 typedef unsigned int uint_fast16_t;
663 typedef signed int int32_t;
664 typedef unsigned int uint32_t;
665 typedef signed int int_fast32_t;
666 typedef unsigned int uint_fast32_t;
667 #if __GNUC__
668 typedef signed long long int64_t;
669 typedef unsigned long long uint64_t;
670 #else /* _MSC_VER || __BORLANDC__ */
671 typedef signed __int64 int64_t;
672 typedef unsigned __int64 uint64_t;
673 #endif
674 typedef int64_t int_fast64_t;
675 typedef uint64_t uint_fast64_t;
676 #ifdef _WIN64
677 #define ECB_PTRSIZE 8
678 typedef uint64_t uintptr_t;
679 typedef int64_t intptr_t;
680 #else
681 #define ECB_PTRSIZE 4
682 typedef uint32_t uintptr_t;
683 typedef int32_t intptr_t;
684 #endif
685#else
686 #include <inttypes.h>
687 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
688 #define ECB_PTRSIZE 8
689 #else
690 #define ECB_PTRSIZE 4
691 #endif
692#endif
693
694#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
695#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
696
697#ifndef ECB_OPTIMIZE_SIZE
698 #if __OPTIMIZE_SIZE__
699 #define ECB_OPTIMIZE_SIZE 1
700 #else
701 #define ECB_OPTIMIZE_SIZE 0
702 #endif
703#endif
704
705/* work around x32 idiocy by defining proper macros */
706#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
707 #if _ILP32
708 #define ECB_AMD64_X32 1
709 #else
710 #define ECB_AMD64 1
711 #endif
712#endif
471 713
472/* many compilers define _GNUC_ to some versions but then only implement 714/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions, 715 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers. 716 * causing enormous grief in return for some better fake benchmark numbers.
475 * or so. 717 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have 718 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place. 719 * an issue with that they should have done it right in the first place.
478 */ 720 */
479#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) 721#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
481 #define ECB_GCC_VERSION(major,minor) 0 722 #define ECB_GCC_VERSION(major,minor) 0
482 #else 723#else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 724 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
725#endif
726
727#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
728
729#if __clang__ && defined __has_builtin
730 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
731#else
732 #define ECB_CLANG_BUILTIN(x) 0
733#endif
734
735#if __clang__ && defined __has_extension
736 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
737#else
738 #define ECB_CLANG_EXTENSION(x) 0
739#endif
740
741#define ECB_CPP (__cplusplus+0)
742#define ECB_CPP11 (__cplusplus >= 201103L)
743#define ECB_CPP14 (__cplusplus >= 201402L)
744#define ECB_CPP17 (__cplusplus >= 201703L)
745
746#if ECB_CPP
747 #define ECB_C 0
748 #define ECB_STDC_VERSION 0
749#else
750 #define ECB_C 1
751 #define ECB_STDC_VERSION __STDC_VERSION__
752#endif
753
754#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
755#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
756#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
757
758#if ECB_CPP
759 #define ECB_EXTERN_C extern "C"
760 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
761 #define ECB_EXTERN_C_END }
762#else
763 #define ECB_EXTERN_C extern
764 #define ECB_EXTERN_C_BEG
765 #define ECB_EXTERN_C_END
766#endif
767
768/*****************************************************************************/
769
770/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
771/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
772
773#if ECB_NO_THREADS
774 #define ECB_NO_SMP 1
775#endif
776
777#if ECB_NO_SMP
778 #define ECB_MEMORY_FENCE do { } while (0)
779#endif
780
781/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
782#if __xlC__ && ECB_CPP
783 #include <builtins.h>
784#endif
785
786#if 1400 <= _MSC_VER
787 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
788#endif
789
790#ifndef ECB_MEMORY_FENCE
791 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
792 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
793 #if __i386 || __i386__
794 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
795 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
796 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
797 #elif ECB_GCC_AMD64
798 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
799 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
800 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
801 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
802 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
803 #elif defined __ARM_ARCH_2__ \
804 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
805 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
806 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
807 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
808 || defined __ARM_ARCH_5TEJ__
809 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
810 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
811 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
812 || defined __ARM_ARCH_6T2__
813 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
814 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
815 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
816 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
817 #elif __aarch64__
818 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
819 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
820 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
821 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
822 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
823 #elif defined __s390__ || defined __s390x__
824 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
825 #elif defined __mips__
826 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
827 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
828 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
829 #elif defined __alpha__
830 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
831 #elif defined __hppa__
832 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
833 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
834 #elif defined __ia64__
835 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
836 #elif defined __m68k__
837 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
838 #elif defined __m88k__
839 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
840 #elif defined __sh__
841 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
842 #endif
484 #endif 843 #endif
485#endif 844#endif
486 845
487#if __cplusplus 846#ifndef ECB_MEMORY_FENCE
847 #if ECB_GCC_VERSION(4,7)
848 /* see comment below (stdatomic.h) about the C11 memory model. */
849 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
850 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
851 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
852 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
853
854 #elif ECB_CLANG_EXTENSION(c_atomic)
855 /* see comment below (stdatomic.h) about the C11 memory model. */
856 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
857 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
858 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
859 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
860
861 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
862 #define ECB_MEMORY_FENCE __sync_synchronize ()
863 #elif _MSC_VER >= 1500 /* VC++ 2008 */
864 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
865 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
866 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
867 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
868 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
869 #elif _MSC_VER >= 1400 /* VC++ 2005 */
870 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
871 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
872 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
873 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
874 #elif defined _WIN32
875 #include <WinNT.h>
876 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
877 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
878 #include <mbarrier.h>
879 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
880 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
881 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
882 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
883 #elif __xlC__
884 #define ECB_MEMORY_FENCE __sync ()
885 #endif
886#endif
887
888#ifndef ECB_MEMORY_FENCE
889 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
890 /* we assume that these memory fences work on all variables/all memory accesses, */
891 /* not just C11 atomics and atomic accesses */
892 #include <stdatomic.h>
893 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
894 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
895 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
896 #endif
897#endif
898
899#ifndef ECB_MEMORY_FENCE
900 #if !ECB_AVOID_PTHREADS
901 /*
902 * if you get undefined symbol references to pthread_mutex_lock,
903 * or failure to find pthread.h, then you should implement
904 * the ECB_MEMORY_FENCE operations for your cpu/compiler
905 * OR provide pthread.h and link against the posix thread library
906 * of your system.
907 */
908 #include <pthread.h>
909 #define ECB_NEEDS_PTHREADS 1
910 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
911
912 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
913 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
914 #endif
915#endif
916
917#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
918 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
919#endif
920
921#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
922 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
923#endif
924
925#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
926 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
927#endif
928
929/*****************************************************************************/
930
931#if ECB_CPP
488 #define ecb_inline static inline 932 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5) 933#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__ 934 #define ecb_inline static __inline__
491#elif ECB_C99 935#elif ECB_C99
492 #define ecb_inline static inline 936 #define ecb_inline static inline
493#else 937#else
494 #define ecb_inline static 938 #define ecb_inline static
495#endif 939#endif
496 940
497#if ECB_GCC_VERSION(3,1) 941#if ECB_GCC_VERSION(3,3)
942 #define ecb_restrict __restrict__
943#elif ECB_C99
944 #define ecb_restrict restrict
945#else
946 #define ecb_restrict
947#endif
948
949typedef int ecb_bool;
950
951#define ECB_CONCAT_(a, b) a ## b
952#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
953#define ECB_STRINGIFY_(a) # a
954#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
955#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
956
957#define ecb_function_ ecb_inline
958
959#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
498 #define ecb_attribute(attrlist) __attribute__(attrlist) 960 #define ecb_attribute(attrlist) __attribute__ (attrlist)
961#else
962 #define ecb_attribute(attrlist)
963#endif
964
965#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
499 #define ecb_is_constant(expr) __builtin_constant_p (expr) 966 #define ecb_is_constant(expr) __builtin_constant_p (expr)
967#else
968 /* possible C11 impl for integral types
969 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
970 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
971
972 #define ecb_is_constant(expr) 0
973#endif
974
975#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
500 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 976 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
977#else
978 #define ecb_expect(expr,value) (expr)
979#endif
980
981#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
501 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 982 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
502#else 983#else
503 #define ecb_attribute(attrlist)
504 #define ecb_is_constant(expr) 0
505 #define ecb_expect(expr,value) (expr)
506 #define ecb_prefetch(addr,rw,locality) 984 #define ecb_prefetch(addr,rw,locality)
507#endif 985#endif
508 986
987/* no emulation for ecb_decltype */
988#if ECB_CPP11
989 // older implementations might have problems with decltype(x)::type, work around it
990 template<class T> struct ecb_decltype_t { typedef T type; };
991 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
992#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
993 #define ecb_decltype(x) __typeof__ (x)
994#endif
995
996#if _MSC_VER >= 1300
997 #define ecb_deprecated __declspec (deprecated)
998#else
999 #define ecb_deprecated ecb_attribute ((__deprecated__))
1000#endif
1001
1002#if _MSC_VER >= 1500
1003 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
1004#elif ECB_GCC_VERSION(4,5)
1005 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
1006#else
1007 #define ecb_deprecated_message(msg) ecb_deprecated
1008#endif
1009
1010#if _MSC_VER >= 1400
1011 #define ecb_noinline __declspec (noinline)
1012#else
509#define ecb_noinline ecb_attribute ((__noinline__)) 1013 #define ecb_noinline ecb_attribute ((__noinline__))
510#define ecb_noreturn ecb_attribute ((__noreturn__)) 1014#endif
1015
511#define ecb_unused ecb_attribute ((__unused__)) 1016#define ecb_unused ecb_attribute ((__unused__))
512#define ecb_const ecb_attribute ((__const__)) 1017#define ecb_const ecb_attribute ((__const__))
513#define ecb_pure ecb_attribute ((__pure__)) 1018#define ecb_pure ecb_attribute ((__pure__))
1019
1020#if ECB_C11 || __IBMC_NORETURN
1021 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
1022 #define ecb_noreturn _Noreturn
1023#elif ECB_CPP11
1024 #define ecb_noreturn [[noreturn]]
1025#elif _MSC_VER >= 1200
1026 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
1027 #define ecb_noreturn __declspec (noreturn)
1028#else
1029 #define ecb_noreturn ecb_attribute ((__noreturn__))
1030#endif
514 1031
515#if ECB_GCC_VERSION(4,3) 1032#if ECB_GCC_VERSION(4,3)
516 #define ecb_artificial ecb_attribute ((__artificial__)) 1033 #define ecb_artificial ecb_attribute ((__artificial__))
517 #define ecb_hot ecb_attribute ((__hot__)) 1034 #define ecb_hot ecb_attribute ((__hot__))
518 #define ecb_cold ecb_attribute ((__cold__)) 1035 #define ecb_cold ecb_attribute ((__cold__))
… …
525/* put around conditional expressions if you are very sure that the */ 1042/* put around conditional expressions if you are very sure that the */
526/* expression is mostly true or mostly false. note that these return */ 1043/* expression is mostly true or mostly false. note that these return */
527/* booleans, not the expression. */ 1044/* booleans, not the expression. */
528#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) 1045#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
529#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) 1046#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
530/* ecb.h end */ 1047/* for compatibility to the rest of the world */
1048#define ecb_likely(expr) ecb_expect_true (expr)
1049#define ecb_unlikely(expr) ecb_expect_false (expr)
531 1050
532#define expect_false(cond) ecb_expect_false (cond) 1051/* count trailing zero bits and count # of one bits */
533#define expect_true(cond) ecb_expect_true (cond) 1052#if ECB_GCC_VERSION(3,4) \
534#define noinline ecb_noinline 1053 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1054 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1055 && ECB_CLANG_BUILTIN(__builtin_popcount))
1056 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1057 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1058 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1059 #define ecb_ctz32(x) __builtin_ctz (x)
1060 #define ecb_ctz64(x) __builtin_ctzll (x)
1061 #define ecb_popcount32(x) __builtin_popcount (x)
1062 /* no popcountll */
1063#else
1064 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1065 ecb_function_ ecb_const int
1066 ecb_ctz32 (uint32_t x)
1067 {
1068#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1069 unsigned long r;
1070 _BitScanForward (&r, x);
1071 return (int)r;
1072#else
1073 int r = 0;
1074
1075 x &= ~x + 1; /* this isolates the lowest bit */
1076
1077#if ECB_branchless_on_i386
1078 r += !!(x & 0xaaaaaaaa) << 0;
1079 r += !!(x & 0xcccccccc) << 1;
1080 r += !!(x & 0xf0f0f0f0) << 2;
1081 r += !!(x & 0xff00ff00) << 3;
1082 r += !!(x & 0xffff0000) << 4;
1083#else
1084 if (x & 0xaaaaaaaa) r += 1;
1085 if (x & 0xcccccccc) r += 2;
1086 if (x & 0xf0f0f0f0) r += 4;
1087 if (x & 0xff00ff00) r += 8;
1088 if (x & 0xffff0000) r += 16;
1089#endif
1090
1091 return r;
1092#endif
1093 }
1094
1095 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1096 ecb_function_ ecb_const int
1097 ecb_ctz64 (uint64_t x)
1098 {
1099#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1100 unsigned long r;
1101 _BitScanForward64 (&r, x);
1102 return (int)r;
1103#else
1104 int shift = x & 0xffffffff ? 0 : 32;
1105 return ecb_ctz32 (x >> shift) + shift;
1106#endif
1107 }
1108
1109 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1110 ecb_function_ ecb_const int
1111 ecb_popcount32 (uint32_t x)
1112 {
1113 x -= (x >> 1) & 0x55555555;
1114 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1115 x = ((x >> 4) + x) & 0x0f0f0f0f;
1116 x *= 0x01010101;
1117
1118 return x >> 24;
1119 }
1120
1121 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1122 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1123 {
1124#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1125 unsigned long r;
1126 _BitScanReverse (&r, x);
1127 return (int)r;
1128#else
1129 int r = 0;
1130
1131 if (x >> 16) { x >>= 16; r += 16; }
1132 if (x >> 8) { x >>= 8; r += 8; }
1133 if (x >> 4) { x >>= 4; r += 4; }
1134 if (x >> 2) { x >>= 2; r += 2; }
1135 if (x >> 1) { r += 1; }
1136
1137 return r;
1138#endif
1139 }
1140
1141 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1142 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1143 {
1144#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1145 unsigned long r;
1146 _BitScanReverse64 (&r, x);
1147 return (int)r;
1148#else
1149 int r = 0;
1150
1151 if (x >> 32) { x >>= 32; r += 32; }
1152
1153 return r + ecb_ld32 (x);
1154#endif
1155 }
1156#endif
1157
1158ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1159ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1160ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1161ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1162
1163ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1164ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1165{
1166 return ( (x * 0x0802U & 0x22110U)
1167 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1168}
1169
1170ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1171ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1172{
1173 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1174 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1175 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1176 x = ( x >> 8 ) | ( x << 8);
1177
1178 return x;
1179}
1180
1181ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1182ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1183{
1184 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1185 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1186 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1187 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1188 x = ( x >> 16 ) | ( x << 16);
1189
1190 return x;
1191}
1192
1193/* popcount64 is only available on 64 bit cpus as gcc builtin */
1194/* so for this version we are lazy */
1195ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1196ecb_function_ ecb_const int
1197ecb_popcount64 (uint64_t x)
1198{
1199 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1200}
1201
1202ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1203ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1204ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1205ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1206ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1207ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1208ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1209ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1210
1211ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1212ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1213ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1214ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1215ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1216ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1217ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1218ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1219
1220#if ECB_CPP
1221
1222inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
1223inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
1224inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
1225inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
1226
1227inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
1228inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
1229inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
1230inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
1231
1232inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
1233inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
1234inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
1235inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
1236
1237inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
1238inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
1239inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
1240inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
1241
1242inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
1243inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
1244inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
1245
1246inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
1247inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
1248inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
1249inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
1250
1251inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
1252inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
1253inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
1254inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
1255
1256#endif
1257
1258#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1259 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1260 #define ecb_bswap16(x) __builtin_bswap16 (x)
1261 #else
1262 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1263 #endif
1264 #define ecb_bswap32(x) __builtin_bswap32 (x)
1265 #define ecb_bswap64(x) __builtin_bswap64 (x)
1266#elif _MSC_VER
1267 #include <stdlib.h>
1268 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1269 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1270 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1271#else
1272 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1273 ecb_function_ ecb_const uint16_t
1274 ecb_bswap16 (uint16_t x)
1275 {
1276 return ecb_rotl16 (x, 8);
1277 }
1278
1279 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1280 ecb_function_ ecb_const uint32_t
1281 ecb_bswap32 (uint32_t x)
1282 {
1283 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1284 }
1285
1286 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1287 ecb_function_ ecb_const uint64_t
1288 ecb_bswap64 (uint64_t x)
1289 {
1290 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1291 }
1292#endif
1293
1294#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1295 #define ecb_unreachable() __builtin_unreachable ()
1296#else
1297 /* this seems to work fine, but gcc always emits a warning for it :/ */
1298 ecb_inline ecb_noreturn void ecb_unreachable (void);
1299 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1300#endif
1301
1302/* try to tell the compiler that some condition is definitely true */
1303#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1304
1305ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1306ecb_inline ecb_const uint32_t
1307ecb_byteorder_helper (void)
1308{
1309 /* the union code still generates code under pressure in gcc, */
1310 /* but less than using pointers, and always seems to */
1311 /* successfully return a constant. */
1312 /* the reason why we have this horrible preprocessor mess */
1313 /* is to avoid it in all cases, at least on common architectures */
1314 /* or when using a recent enough gcc version (>= 4.6) */
1315#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1316 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1317 #define ECB_LITTLE_ENDIAN 1
1318 return 0x44332211;
1319#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1320 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1321 #define ECB_BIG_ENDIAN 1
1322 return 0x11223344;
1323#else
1324 union
1325 {
1326 uint8_t c[4];
1327 uint32_t u;
1328 } u = { 0x11, 0x22, 0x33, 0x44 };
1329 return u.u;
1330#endif
1331}
1332
1333ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1334ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1335ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1336ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1337
1338/*****************************************************************************/
1339/* unaligned load/store */
1340
1341ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1342ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1343ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1344
1345ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1346ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1347ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1348
1349ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1350ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1351ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1352
1353ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
1354ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
1355ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
1356
1357ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
1358ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
1359ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
1360
1361ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1362ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1363ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1364
1365ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1366ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1367ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1368
1369ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
1370ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
1371ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
1372
1373ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
1374ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
1375ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
1376
1377ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
1378ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
1379ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
1380
1381#if ECB_CPP
1382
1383inline uint8_t ecb_bswap (uint8_t v) { return v; }
1384inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
1385inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
1386inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
1387
1388template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1389template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1390template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
1391template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
1392template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
1393template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
1394template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
1395template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
1396
1397template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1398template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1399template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
1400template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
1401template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
1402template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
1403template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
1404template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
1405
1406#endif
1407
1408/*****************************************************************************/
1409
1410#if ECB_GCC_VERSION(3,0) || ECB_C99
1411 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1412#else
1413 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1414#endif
1415
1416#if ECB_CPP
1417 template<typename T>
1418 static inline T ecb_div_rd (T val, T div)
1419 {
1420 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1421 }
1422 template<typename T>
1423 static inline T ecb_div_ru (T val, T div)
1424 {
1425 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1426 }
1427#else
1428 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1429 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1430#endif
1431
1432#if ecb_cplusplus_does_not_suck
1433 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1434 template<typename T, int N>
1435 static inline int ecb_array_length (const T (&arr)[N])
1436 {
1437 return N;
1438 }
1439#else
1440 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1441#endif
1442
1443/*****************************************************************************/
1444
1445ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1446ecb_function_ ecb_const uint32_t
1447ecb_binary16_to_binary32 (uint32_t x)
1448{
1449 unsigned int s = (x & 0x8000) << (31 - 15);
1450 int e = (x >> 10) & 0x001f;
1451 unsigned int m = x & 0x03ff;
1452
1453 if (ecb_expect_false (e == 31))
1454 /* infinity or NaN */
1455 e = 255 - (127 - 15);
1456 else if (ecb_expect_false (!e))
1457 {
1458 if (ecb_expect_true (!m))
1459 /* zero, handled by code below by forcing e to 0 */
1460 e = 0 - (127 - 15);
1461 else
1462 {
1463 /* subnormal, renormalise */
1464 unsigned int s = 10 - ecb_ld32 (m);
1465
1466 m = (m << s) & 0x3ff; /* mask implicit bit */
1467 e -= s - 1;
1468 }
1469 }
1470
1471 /* e and m now are normalised, or zero, (or inf or nan) */
1472 e += 127 - 15;
1473
1474 return s | (e << 23) | (m << (23 - 10));
1475}
1476
1477ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1478ecb_function_ ecb_const uint16_t
1479ecb_binary32_to_binary16 (uint32_t x)
1480{
1481 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1482 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1483 unsigned int m = x & 0x007fffff;
1484
1485 x &= 0x7fffffff;
1486
1487 /* if it's within range of binary16 normals, use fast path */
1488 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1489 {
1490 /* mantissa round-to-even */
1491 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1492
1493 /* handle overflow */
1494 if (ecb_expect_false (m >= 0x00800000))
1495 {
1496 m >>= 1;
1497 e += 1;
1498 }
1499
1500 return s | (e << 10) | (m >> (23 - 10));
1501 }
1502
1503 /* handle large numbers and infinity */
1504 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1505 return s | 0x7c00;
1506
1507 /* handle zero, subnormals and small numbers */
1508 if (ecb_expect_true (x < 0x38800000))
1509 {
1510 /* zero */
1511 if (ecb_expect_true (!x))
1512 return s;
1513
1514 /* handle subnormals */
1515
1516 /* too small, will be zero */
1517 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1518 return s;
1519
1520 m |= 0x00800000; /* make implicit bit explicit */
1521
1522 /* very tricky - we need to round to the nearest e (+10) bit value */
1523 {
1524 unsigned int bits = 14 - e;
1525 unsigned int half = (1 << (bits - 1)) - 1;
1526 unsigned int even = (m >> bits) & 1;
1527
1528 /* if this overflows, we will end up with a normalised number */
1529 m = (m + half + even) >> bits;
1530 }
1531
1532 return s | m;
1533 }
1534
1535 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1536 m >>= 13;
1537
1538 return s | 0x7c00 | m | !m;
1539}
1540
1541/*******************************************************************************/
1542/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1543
1544/* basically, everything uses "ieee pure-endian" floating point numbers */
1545/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1546#if 0 \
1547 || __i386 || __i386__ \
1548 || ECB_GCC_AMD64 \
1549 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1550 || defined __s390__ || defined __s390x__ \
1551 || defined __mips__ \
1552 || defined __alpha__ \
1553 || defined __hppa__ \
1554 || defined __ia64__ \
1555 || defined __m68k__ \
1556 || defined __m88k__ \
1557 || defined __sh__ \
1558 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1559 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1560 || defined __aarch64__
1561 #define ECB_STDFP 1
1562#else
1563 #define ECB_STDFP 0
1564#endif
1565
1566#ifndef ECB_NO_LIBM
1567
1568 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1569
1570 /* only the oldest of old doesn't have this one. solaris. */
1571 #ifdef INFINITY
1572 #define ECB_INFINITY INFINITY
1573 #else
1574 #define ECB_INFINITY HUGE_VAL
1575 #endif
1576
1577 #ifdef NAN
1578 #define ECB_NAN NAN
1579 #else
1580 #define ECB_NAN ECB_INFINITY
1581 #endif
1582
1583 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1584 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1585 #define ecb_frexpf(x,e) frexpf ((x), (e))
1586 #else
1587 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1588 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1589 #endif
1590
1591 /* convert a float to ieee single/binary32 */
1592 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1593 ecb_function_ ecb_const uint32_t
1594 ecb_float_to_binary32 (float x)
1595 {
1596 uint32_t r;
1597
1598 #if ECB_STDFP
1599 memcpy (&r, &x, 4);
1600 #else
1601 /* slow emulation, works for anything but -0 */
1602 uint32_t m;
1603 int e;
1604
1605 if (x == 0e0f ) return 0x00000000U;
1606 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1607 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1608 if (x != x ) return 0x7fbfffffU;
1609
1610 m = ecb_frexpf (x, &e) * 0x1000000U;
1611
1612 r = m & 0x80000000U;
1613
1614 if (r)
1615 m = -m;
1616
1617 if (e <= -126)
1618 {
1619 m &= 0xffffffU;
1620 m >>= (-125 - e);
1621 e = -126;
1622 }
1623
1624 r |= (e + 126) << 23;
1625 r |= m & 0x7fffffU;
1626 #endif
1627
1628 return r;
1629 }
1630
1631 /* converts an ieee single/binary32 to a float */
1632 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1633 ecb_function_ ecb_const float
1634 ecb_binary32_to_float (uint32_t x)
1635 {
1636 float r;
1637
1638 #if ECB_STDFP
1639 memcpy (&r, &x, 4);
1640 #else
1641 /* emulation, only works for normals and subnormals and +0 */
1642 int neg = x >> 31;
1643 int e = (x >> 23) & 0xffU;
1644
1645 x &= 0x7fffffU;
1646
1647 if (e)
1648 x |= 0x800000U;
1649 else
1650 e = 1;
1651
1652 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1653 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1654
1655 r = neg ? -r : r;
1656 #endif
1657
1658 return r;
1659 }
1660
1661 /* convert a double to ieee double/binary64 */
1662 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1663 ecb_function_ ecb_const uint64_t
1664 ecb_double_to_binary64 (double x)
1665 {
1666 uint64_t r;
1667
1668 #if ECB_STDFP
1669 memcpy (&r, &x, 8);
1670 #else
1671 /* slow emulation, works for anything but -0 */
1672 uint64_t m;
1673 int e;
1674
1675 if (x == 0e0 ) return 0x0000000000000000U;
1676 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1677 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1678 if (x != x ) return 0X7ff7ffffffffffffU;
1679
1680 m = frexp (x, &e) * 0x20000000000000U;
1681
1682 r = m & 0x8000000000000000;;
1683
1684 if (r)
1685 m = -m;
1686
1687 if (e <= -1022)
1688 {
1689 m &= 0x1fffffffffffffU;
1690 m >>= (-1021 - e);
1691 e = -1022;
1692 }
1693
1694 r |= ((uint64_t)(e + 1022)) << 52;
1695 r |= m & 0xfffffffffffffU;
1696 #endif
1697
1698 return r;
1699 }
1700
1701 /* converts an ieee double/binary64 to a double */
1702 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1703 ecb_function_ ecb_const double
1704 ecb_binary64_to_double (uint64_t x)
1705 {
1706 double r;
1707
1708 #if ECB_STDFP
1709 memcpy (&r, &x, 8);
1710 #else
1711 /* emulation, only works for normals and subnormals and +0 */
1712 int neg = x >> 63;
1713 int e = (x >> 52) & 0x7ffU;
1714
1715 x &= 0xfffffffffffffU;
1716
1717 if (e)
1718 x |= 0x10000000000000U;
1719 else
1720 e = 1;
1721
1722 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1723 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1724
1725 r = neg ? -r : r;
1726 #endif
1727
1728 return r;
1729 }
1730
1731 /* convert a float to ieee half/binary16 */
1732 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1733 ecb_function_ ecb_const uint16_t
1734 ecb_float_to_binary16 (float x)
1735 {
1736 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1737 }
1738
1739 /* convert an ieee half/binary16 to float */
1740 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1741 ecb_function_ ecb_const float
1742 ecb_binary16_to_float (uint16_t x)
1743 {
1744 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1745 }
1746
1747#endif
1748
1749#endif
1750
1751/* ECB.H END */
1752
1753#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1754/* if your architecture doesn't need memory fences, e.g. because it is
1755 * single-cpu/core, or if you use libev in a project that doesn't use libev
1756 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1757 * libev, in which cases the memory fences become nops.
1758 * alternatively, you can remove this #error and link against libpthread,
1759 * which will then provide the memory fences.
1760 */
1761# error "memory fences not defined for your architecture, please report"
1762#endif
1763
1764#ifndef ECB_MEMORY_FENCE
1765# define ECB_MEMORY_FENCE do { } while (0)
1766# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1767# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1768#endif
535 1769
536#define inline_size ecb_inline 1770#define inline_size ecb_inline
537 1771
538#if EV_FEATURE_CODE 1772#if EV_FEATURE_CODE
539# define inline_speed ecb_inline 1773# define inline_speed ecb_inline
540#else 1774#else
541# define inline_speed static noinline 1775# define inline_speed ecb_noinline static
542#endif 1776#endif
1777
1778/*****************************************************************************/
1779/* raw syscall wrappers */
1780
1781#if EV_NEED_SYSCALL
1782
1783#include <sys/syscall.h>
1784
1785/*
1786 * define some syscall wrappers for common architectures
1787 * this is mostly for nice looks during debugging, not performance.
1788 * our syscalls return < 0, not == -1, on error. which is good
1789 * enough for linux aio.
1790 * TODO: arm is also common nowadays, maybe even mips and x86
1791 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1792 */
1793#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1794 /* the costly errno access probably kills this for size optimisation */
1795
1796 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1797 ({ \
1798 long res; \
1799 register unsigned long r6 __asm__ ("r9" ); \
1800 register unsigned long r5 __asm__ ("r8" ); \
1801 register unsigned long r4 __asm__ ("r10"); \
1802 register unsigned long r3 __asm__ ("rdx"); \
1803 register unsigned long r2 __asm__ ("rsi"); \
1804 register unsigned long r1 __asm__ ("rdi"); \
1805 if (narg >= 6) r6 = (unsigned long)(arg6); \
1806 if (narg >= 5) r5 = (unsigned long)(arg5); \
1807 if (narg >= 4) r4 = (unsigned long)(arg4); \
1808 if (narg >= 3) r3 = (unsigned long)(arg3); \
1809 if (narg >= 2) r2 = (unsigned long)(arg2); \
1810 if (narg >= 1) r1 = (unsigned long)(arg1); \
1811 __asm__ __volatile__ ( \
1812 "syscall\n\t" \
1813 : "=a" (res) \
1814 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1815 : "cc", "r11", "cx", "memory"); \
1816 errno = -res; \
1817 res; \
1818 })
1819
1820#endif
1821
1822#ifdef ev_syscall
1823 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1824 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1825 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1826 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1827 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1828 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1829 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1830#else
1831 #define ev_syscall0(nr) syscall (nr)
1832 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1833 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1834 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1835 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1836 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1837 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1838#endif
1839
1840#endif
1841
1842/*****************************************************************************/
543 1843
544#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1844#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
545 1845
546#if EV_MINPRI == EV_MAXPRI 1846#if EV_MINPRI == EV_MAXPRI
547# define ABSPRI(w) (((W)w), 0) 1847# define ABSPRI(w) (((W)w), 0)
548#else 1848#else
549# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1849# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
550#endif 1850#endif
551 1851
552#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1852#define EMPTY /* required for microsofts broken pseudo-c compiler */
553#define EMPTY2(a,b) /* used to suppress some warnings */
554 1853
555typedef ev_watcher *W; 1854typedef ev_watcher *W;
556typedef ev_watcher_list *WL; 1855typedef ev_watcher_list *WL;
557typedef ev_watcher_time *WT; 1856typedef ev_watcher_time *WT;
558 1857
… …
583# include "ev_win32.c" 1882# include "ev_win32.c"
584#endif 1883#endif
585 1884
586/*****************************************************************************/ 1885/*****************************************************************************/
587 1886
1887#if EV_USE_LINUXAIO
1888# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1889#endif
1890
588/* define a suitable floor function (only used by periodics atm) */ 1891/* define a suitable floor function (only used by periodics atm) */
589 1892
590#if EV_USE_FLOOR 1893#if EV_USE_FLOOR
591# include <math.h> 1894# include <math.h>
592# define ev_floor(v) floor (v) 1895# define ev_floor(v) floor (v)
593#else 1896#else
594 1897
595#include <float.h> 1898#include <float.h>
596 1899
597/* a floor() replacement function, should be independent of ev_tstamp type */ 1900/* a floor() replacement function, should be independent of ev_tstamp type */
1901ecb_noinline
598static ev_tstamp noinline 1902static ev_tstamp
599ev_floor (ev_tstamp v) 1903ev_floor (ev_tstamp v)
600{ 1904{
601 /* the choice of shift factor is not terribly important */ 1905 /* the choice of shift factor is not terribly important */
602#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ 1906#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
603 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1907 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
604#else 1908#else
605 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; 1909 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
606#endif 1910#endif
607 1911
1912 /* special treatment for negative arguments */
1913 if (ecb_expect_false (v < 0.))
1914 {
1915 ev_tstamp f = -ev_floor (-v);
1916
1917 return f - (f == v ? 0 : 1);
1918 }
1919
608 /* argument too large for an unsigned long? */ 1920 /* argument too large for an unsigned long? then reduce it */
609 if (expect_false (v >= shift)) 1921 if (ecb_expect_false (v >= shift))
610 { 1922 {
611 ev_tstamp f; 1923 ev_tstamp f;
612 1924
613 if (v == v - 1.) 1925 if (v == v - 1.)
614 return v; /* very large number */ 1926 return v; /* very large numbers are assumed to be integer */
615 1927
616 f = shift * ev_floor (v * (1. / shift)); 1928 f = shift * ev_floor (v * (1. / shift));
617 return f + ev_floor (v - f); 1929 return f + ev_floor (v - f);
618 } 1930 }
619 1931
620 /* special treatment for negative args? */
621 if (expect_false (v < 0.))
622 {
623 ev_tstamp f = -ev_floor (-v);
624
625 return f - (f == v ? 0 : 1);
626 }
627
628 /* fits into an unsigned long */ 1932 /* fits into an unsigned long */
629 return (unsigned long)v; 1933 return (unsigned long)v;
630} 1934}
631 1935
632#endif 1936#endif
… …
635 1939
636#ifdef __linux 1940#ifdef __linux
637# include <sys/utsname.h> 1941# include <sys/utsname.h>
638#endif 1942#endif
639 1943
640static unsigned int noinline ecb_cold 1944ecb_noinline ecb_cold
1945static unsigned int
641ev_linux_version (void) 1946ev_linux_version (void)
642{ 1947{
643#ifdef __linux 1948#ifdef __linux
644 unsigned int v = 0; 1949 unsigned int v = 0;
645 struct utsname buf; 1950 struct utsname buf;
… …
674} 1979}
675 1980
676/*****************************************************************************/ 1981/*****************************************************************************/
677 1982
678#if EV_AVOID_STDIO 1983#if EV_AVOID_STDIO
679static void noinline ecb_cold 1984ecb_noinline ecb_cold
1985static void
680ev_printerr (const char *msg) 1986ev_printerr (const char *msg)
681{ 1987{
682 write (STDERR_FILENO, msg, strlen (msg)); 1988 write (STDERR_FILENO, msg, strlen (msg));
683} 1989}
684#endif 1990#endif
685 1991
686static void (*syserr_cb)(const char *msg); 1992static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
687 1993
688void ecb_cold 1994ecb_cold
1995void
689ev_set_syserr_cb (void (*cb)(const char *msg)) 1996ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
690{ 1997{
691 syserr_cb = cb; 1998 syserr_cb = cb;
692} 1999}
693 2000
694static void noinline ecb_cold 2001ecb_noinline ecb_cold
2002static void
695ev_syserr (const char *msg) 2003ev_syserr (const char *msg)
696{ 2004{
697 if (!msg) 2005 if (!msg)
698 msg = "(libev) system error"; 2006 msg = "(libev) system error";
699 2007
… …
712 abort (); 2020 abort ();
713 } 2021 }
714} 2022}
715 2023
716static void * 2024static void *
717ev_realloc_emul (void *ptr, long size) 2025ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
718{ 2026{
719#if __GLIBC__
720 return realloc (ptr, size);
721#else
722 /* some systems, notably openbsd and darwin, fail to properly 2027 /* some systems, notably openbsd and darwin, fail to properly
723 * implement realloc (x, 0) (as required by both ansi c-89 and 2028 * implement realloc (x, 0) (as required by both ansi c-89 and
724 * the single unix specification, so work around them here. 2029 * the single unix specification, so work around them here.
2030 * recently, also (at least) fedora and debian started breaking it,
2031 * despite documenting it otherwise.
725 */ 2032 */
726 2033
727 if (size) 2034 if (size)
728 return realloc (ptr, size); 2035 return realloc (ptr, size);
729 2036
730 free (ptr); 2037 free (ptr);
731 return 0; 2038 return 0;
732#endif
733} 2039}
734 2040
735static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 2041static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
736 2042
737void ecb_cold 2043ecb_cold
2044void
738ev_set_allocator (void *(*cb)(void *ptr, long size)) 2045ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
739{ 2046{
740 alloc = cb; 2047 alloc = cb;
741} 2048}
742 2049
743inline_speed void * 2050inline_speed void *
… …
770typedef struct 2077typedef struct
771{ 2078{
772 WL head; 2079 WL head;
773 unsigned char events; /* the events watched for */ 2080 unsigned char events; /* the events watched for */
774 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 2081 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
775 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 2082 unsigned char emask; /* some backends store the actual kernel mask in here */
776 unsigned char unused; 2083 unsigned char eflags; /* flags field for use by backends */
777#if EV_USE_EPOLL 2084#if EV_USE_EPOLL
778 unsigned int egen; /* generation counter to counter epoll bugs */ 2085 unsigned int egen; /* generation counter to counter epoll bugs */
779#endif 2086#endif
780#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2087#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
781 SOCKET handle; 2088 SOCKET handle;
… …
831 #undef VAR 2138 #undef VAR
832 }; 2139 };
833 #include "ev_wrap.h" 2140 #include "ev_wrap.h"
834 2141
835 static struct ev_loop default_loop_struct; 2142 static struct ev_loop default_loop_struct;
836 struct ev_loop *ev_default_loop_ptr; 2143 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
837 2144
838#else 2145#else
839 2146
840 ev_tstamp ev_rt_now; 2147 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
841 #define VAR(name,decl) static decl; 2148 #define VAR(name,decl) static decl;
842 #include "ev_vars.h" 2149 #include "ev_vars.h"
843 #undef VAR 2150 #undef VAR
844 2151
845 static int ev_default_loop_ptr; 2152 static int ev_default_loop_ptr;
846 2153
847#endif 2154#endif
848 2155
849#if EV_FEATURE_API 2156#if EV_FEATURE_API
850# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 2157# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
851# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 2158# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
852# define EV_INVOKE_PENDING invoke_cb (EV_A) 2159# define EV_INVOKE_PENDING invoke_cb (EV_A)
853#else 2160#else
854# define EV_RELEASE_CB (void)0 2161# define EV_RELEASE_CB (void)0
855# define EV_ACQUIRE_CB (void)0 2162# define EV_ACQUIRE_CB (void)0
856# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2163# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
… …
860 2167
861/*****************************************************************************/ 2168/*****************************************************************************/
862 2169
863#ifndef EV_HAVE_EV_TIME 2170#ifndef EV_HAVE_EV_TIME
864ev_tstamp 2171ev_tstamp
865ev_time (void) 2172ev_time (void) EV_NOEXCEPT
866{ 2173{
867#if EV_USE_REALTIME 2174#if EV_USE_REALTIME
868 if (expect_true (have_realtime)) 2175 if (ecb_expect_true (have_realtime))
869 { 2176 {
870 struct timespec ts; 2177 struct timespec ts;
871 clock_gettime (CLOCK_REALTIME, &ts); 2178 clock_gettime (CLOCK_REALTIME, &ts);
872 return ts.tv_sec + ts.tv_nsec * 1e-9; 2179 return EV_TS_GET (ts);
873 } 2180 }
874#endif 2181#endif
875 2182
2183 {
876 struct timeval tv; 2184 struct timeval tv;
877 gettimeofday (&tv, 0); 2185 gettimeofday (&tv, 0);
878 return tv.tv_sec + tv.tv_usec * 1e-6; 2186 return EV_TV_GET (tv);
2187 }
879} 2188}
880#endif 2189#endif
881 2190
882inline_size ev_tstamp 2191inline_size ev_tstamp
883get_clock (void) 2192get_clock (void)
884{ 2193{
885#if EV_USE_MONOTONIC 2194#if EV_USE_MONOTONIC
886 if (expect_true (have_monotonic)) 2195 if (ecb_expect_true (have_monotonic))
887 { 2196 {
888 struct timespec ts; 2197 struct timespec ts;
889 clock_gettime (CLOCK_MONOTONIC, &ts); 2198 clock_gettime (CLOCK_MONOTONIC, &ts);
890 return ts.tv_sec + ts.tv_nsec * 1e-9; 2199 return EV_TS_GET (ts);
891 } 2200 }
892#endif 2201#endif
893 2202
894 return ev_time (); 2203 return ev_time ();
895} 2204}
896 2205
897#if EV_MULTIPLICITY 2206#if EV_MULTIPLICITY
898ev_tstamp 2207ev_tstamp
899ev_now (EV_P) 2208ev_now (EV_P) EV_NOEXCEPT
900{ 2209{
901 return ev_rt_now; 2210 return ev_rt_now;
902} 2211}
903#endif 2212#endif
904 2213
905void 2214void
906ev_sleep (ev_tstamp delay) 2215ev_sleep (ev_tstamp delay) EV_NOEXCEPT
907{ 2216{
908 if (delay > 0.) 2217 if (delay > EV_TS_CONST (0.))
909 { 2218 {
910#if EV_USE_NANOSLEEP 2219#if EV_USE_NANOSLEEP
911 struct timespec ts; 2220 struct timespec ts;
912 2221
913 EV_TS_SET (ts, delay); 2222 EV_TS_SET (ts, delay);
914 nanosleep (&ts, 0); 2223 nanosleep (&ts, 0);
915#elif defined(_WIN32) 2224#elif defined _WIN32
2225 /* maybe this should round up, as ms is very low resolution */
2226 /* compared to select (µs) or nanosleep (ns) */
916 Sleep ((unsigned long)(delay * 1e3)); 2227 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
917#else 2228#else
918 struct timeval tv; 2229 struct timeval tv;
919 2230
920 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2231 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
921 /* something not guaranteed by newer posix versions, but guaranteed */ 2232 /* something not guaranteed by newer posix versions, but guaranteed */
… …
939 2250
940 do 2251 do
941 ncur <<= 1; 2252 ncur <<= 1;
942 while (cnt > ncur); 2253 while (cnt > ncur);
943 2254
944 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2255 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
945 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2256 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
946 { 2257 {
947 ncur *= elem; 2258 ncur *= elem;
948 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2259 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
949 ncur = ncur - sizeof (void *) * 4; 2260 ncur = ncur - sizeof (void *) * 4;
… …
951 } 2262 }
952 2263
953 return ncur; 2264 return ncur;
954} 2265}
955 2266
956static void * noinline ecb_cold 2267ecb_noinline ecb_cold
2268static void *
957array_realloc (int elem, void *base, int *cur, int cnt) 2269array_realloc (int elem, void *base, int *cur, int cnt)
958{ 2270{
959 *cur = array_nextsize (elem, *cur, cnt); 2271 *cur = array_nextsize (elem, *cur, cnt);
960 return ev_realloc (base, elem * *cur); 2272 return ev_realloc (base, elem * *cur);
961} 2273}
962 2274
2275#define array_needsize_noinit(base,offset,count)
2276
963#define array_init_zero(base,count) \ 2277#define array_needsize_zerofill(base,offset,count) \
964 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2278 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
965 2279
966#define array_needsize(type,base,cur,cnt,init) \ 2280#define array_needsize(type,base,cur,cnt,init) \
967 if (expect_false ((cnt) > (cur))) \ 2281 if (ecb_expect_false ((cnt) > (cur))) \
968 { \ 2282 { \
969 int ocur_ = (cur); \ 2283 ecb_unused int ocur_ = (cur); \
970 (base) = (type *)array_realloc \ 2284 (base) = (type *)array_realloc \
971 (sizeof (type), (base), &(cur), (cnt)); \ 2285 (sizeof (type), (base), &(cur), (cnt)); \
972 init ((base) + (ocur_), (cur) - ocur_); \ 2286 init ((base), ocur_, ((cur) - ocur_)); \
973 } 2287 }
974 2288
975#if 0 2289#if 0
976#define array_slim(type,stem) \ 2290#define array_slim(type,stem) \
977 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
986 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2300 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
987 2301
988/*****************************************************************************/ 2302/*****************************************************************************/
989 2303
990/* dummy callback for pending events */ 2304/* dummy callback for pending events */
991static void noinline 2305ecb_noinline
2306static void
992pendingcb (EV_P_ ev_prepare *w, int revents) 2307pendingcb (EV_P_ ev_prepare *w, int revents)
993{ 2308{
994} 2309}
995 2310
996void noinline 2311ecb_noinline
2312void
997ev_feed_event (EV_P_ void *w, int revents) 2313ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
998{ 2314{
999 W w_ = (W)w; 2315 W w_ = (W)w;
1000 int pri = ABSPRI (w_); 2316 int pri = ABSPRI (w_);
1001 2317
1002 if (expect_false (w_->pending)) 2318 if (ecb_expect_false (w_->pending))
1003 pendings [pri][w_->pending - 1].events |= revents; 2319 pendings [pri][w_->pending - 1].events |= revents;
1004 else 2320 else
1005 { 2321 {
1006 w_->pending = ++pendingcnt [pri]; 2322 w_->pending = ++pendingcnt [pri];
1007 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2323 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
1008 pendings [pri][w_->pending - 1].w = w_; 2324 pendings [pri][w_->pending - 1].w = w_;
1009 pendings [pri][w_->pending - 1].events = revents; 2325 pendings [pri][w_->pending - 1].events = revents;
1010 } 2326 }
2327
2328 pendingpri = NUMPRI - 1;
1011} 2329}
1012 2330
1013inline_speed void 2331inline_speed void
1014feed_reverse (EV_P_ W w) 2332feed_reverse (EV_P_ W w)
1015{ 2333{
1016 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2334 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
1017 rfeeds [rfeedcnt++] = w; 2335 rfeeds [rfeedcnt++] = w;
1018} 2336}
1019 2337
1020inline_size void 2338inline_size void
1021feed_reverse_done (EV_P_ int revents) 2339feed_reverse_done (EV_P_ int revents)
… …
1056inline_speed void 2374inline_speed void
1057fd_event (EV_P_ int fd, int revents) 2375fd_event (EV_P_ int fd, int revents)
1058{ 2376{
1059 ANFD *anfd = anfds + fd; 2377 ANFD *anfd = anfds + fd;
1060 2378
1061 if (expect_true (!anfd->reify)) 2379 if (ecb_expect_true (!anfd->reify))
1062 fd_event_nocheck (EV_A_ fd, revents); 2380 fd_event_nocheck (EV_A_ fd, revents);
1063} 2381}
1064 2382
1065void 2383void
1066ev_feed_fd_event (EV_P_ int fd, int revents) 2384ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
1067{ 2385{
1068 if (fd >= 0 && fd < anfdmax) 2386 if (fd >= 0 && fd < anfdmax)
1069 fd_event_nocheck (EV_A_ fd, revents); 2387 fd_event_nocheck (EV_A_ fd, revents);
1070} 2388}
1071 2389
… …
1074inline_size void 2392inline_size void
1075fd_reify (EV_P) 2393fd_reify (EV_P)
1076{ 2394{
1077 int i; 2395 int i;
1078 2396
2397 /* most backends do not modify the fdchanges list in backend_modfiy.
2398 * except io_uring, which has fixed-size buffers which might force us
2399 * to handle events in backend_modify, causing fdchanges to be amended,
2400 * which could result in an endless loop.
2401 * to avoid this, we do not dynamically handle fds that were added
2402 * during fd_reify. that means that for those backends, fdchangecnt
2403 * might be non-zero during poll, which must cause them to not block.
2404 * to not put too much of a burden on other backends, this detail
2405 * needs to be handled in the backend.
2406 */
2407 int changecnt = fdchangecnt;
2408
1079#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2409#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1080 for (i = 0; i < fdchangecnt; ++i) 2410 for (i = 0; i < changecnt; ++i)
1081 { 2411 {
1082 int fd = fdchanges [i]; 2412 int fd = fdchanges [i];
1083 ANFD *anfd = anfds + fd; 2413 ANFD *anfd = anfds + fd;
1084 2414
1085 if (anfd->reify & EV__IOFDSET && anfd->head) 2415 if (anfd->reify & EV__IOFDSET && anfd->head)
… …
1099 } 2429 }
1100 } 2430 }
1101 } 2431 }
1102#endif 2432#endif
1103 2433
1104 for (i = 0; i < fdchangecnt; ++i) 2434 for (i = 0; i < changecnt; ++i)
1105 { 2435 {
1106 int fd = fdchanges [i]; 2436 int fd = fdchanges [i];
1107 ANFD *anfd = anfds + fd; 2437 ANFD *anfd = anfds + fd;
1108 ev_io *w; 2438 ev_io *w;
1109 2439
1110 unsigned char o_events = anfd->events; 2440 unsigned char o_events = anfd->events;
1111 unsigned char o_reify = anfd->reify; 2441 unsigned char o_reify = anfd->reify;
1112 2442
1113 anfd->reify = 0; 2443 anfd->reify = 0;
1114 2444
1115 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2445 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1116 { 2446 {
1117 anfd->events = 0; 2447 anfd->events = 0;
1118 2448
1119 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2449 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1120 anfd->events |= (unsigned char)w->events; 2450 anfd->events |= (unsigned char)w->events;
… …
1125 2455
1126 if (o_reify & EV__IOFDSET) 2456 if (o_reify & EV__IOFDSET)
1127 backend_modify (EV_A_ fd, o_events, anfd->events); 2457 backend_modify (EV_A_ fd, o_events, anfd->events);
1128 } 2458 }
1129 2459
2460 /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
2461 * this is a rare case (see beginning comment in this function), so we copy them to the
2462 * front and hope the backend handles this case.
2463 */
2464 if (ecb_expect_false (fdchangecnt != changecnt))
2465 memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
2466
1130 fdchangecnt = 0; 2467 fdchangecnt -= changecnt;
1131} 2468}
1132 2469
1133/* something about the given fd changed */ 2470/* something about the given fd changed */
1134inline_size void 2471inline_size
2472void
1135fd_change (EV_P_ int fd, int flags) 2473fd_change (EV_P_ int fd, int flags)
1136{ 2474{
1137 unsigned char reify = anfds [fd].reify; 2475 unsigned char reify = anfds [fd].reify;
1138 anfds [fd].reify |= flags; 2476 anfds [fd].reify |= flags;
1139 2477
1140 if (expect_true (!reify)) 2478 if (ecb_expect_true (!reify))
1141 { 2479 {
1142 ++fdchangecnt; 2480 ++fdchangecnt;
1143 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2481 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1144 fdchanges [fdchangecnt - 1] = fd; 2482 fdchanges [fdchangecnt - 1] = fd;
1145 } 2483 }
1146} 2484}
1147 2485
1148/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2486/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1149inline_speed void ecb_cold 2487inline_speed ecb_cold void
1150fd_kill (EV_P_ int fd) 2488fd_kill (EV_P_ int fd)
1151{ 2489{
1152 ev_io *w; 2490 ev_io *w;
1153 2491
1154 while ((w = (ev_io *)anfds [fd].head)) 2492 while ((w = (ev_io *)anfds [fd].head))
… …
1157 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2495 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1158 } 2496 }
1159} 2497}
1160 2498
1161/* check whether the given fd is actually valid, for error recovery */ 2499/* check whether the given fd is actually valid, for error recovery */
1162inline_size int ecb_cold 2500inline_size ecb_cold int
1163fd_valid (int fd) 2501fd_valid (int fd)
1164{ 2502{
1165#ifdef _WIN32 2503#ifdef _WIN32
1166 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2504 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1167#else 2505#else
1168 return fcntl (fd, F_GETFD) != -1; 2506 return fcntl (fd, F_GETFD) != -1;
1169#endif 2507#endif
1170} 2508}
1171 2509
1172/* called on EBADF to verify fds */ 2510/* called on EBADF to verify fds */
1173static void noinline ecb_cold 2511ecb_noinline ecb_cold
2512static void
1174fd_ebadf (EV_P) 2513fd_ebadf (EV_P)
1175{ 2514{
1176 int fd; 2515 int fd;
1177 2516
1178 for (fd = 0; fd < anfdmax; ++fd) 2517 for (fd = 0; fd < anfdmax; ++fd)
… …
1180 if (!fd_valid (fd) && errno == EBADF) 2519 if (!fd_valid (fd) && errno == EBADF)
1181 fd_kill (EV_A_ fd); 2520 fd_kill (EV_A_ fd);
1182} 2521}
1183 2522
1184/* called on ENOMEM in select/poll to kill some fds and retry */ 2523/* called on ENOMEM in select/poll to kill some fds and retry */
1185static void noinline ecb_cold 2524ecb_noinline ecb_cold
2525static void
1186fd_enomem (EV_P) 2526fd_enomem (EV_P)
1187{ 2527{
1188 int fd; 2528 int fd;
1189 2529
1190 for (fd = anfdmax; fd--; ) 2530 for (fd = anfdmax; fd--; )
… …
1194 break; 2534 break;
1195 } 2535 }
1196} 2536}
1197 2537
1198/* usually called after fork if backend needs to re-arm all fds from scratch */ 2538/* usually called after fork if backend needs to re-arm all fds from scratch */
1199static void noinline 2539ecb_noinline
2540static void
1200fd_rearm_all (EV_P) 2541fd_rearm_all (EV_P)
1201{ 2542{
1202 int fd; 2543 int fd;
1203 2544
1204 for (fd = 0; fd < anfdmax; ++fd) 2545 for (fd = 0; fd < anfdmax; ++fd)
… …
1257 ev_tstamp minat; 2598 ev_tstamp minat;
1258 ANHE *minpos; 2599 ANHE *minpos;
1259 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2600 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1260 2601
1261 /* find minimum child */ 2602 /* find minimum child */
1262 if (expect_true (pos + DHEAP - 1 < E)) 2603 if (ecb_expect_true (pos + DHEAP - 1 < E))
1263 { 2604 {
1264 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2605 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1265 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2606 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1266 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2607 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1267 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2608 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1268 } 2609 }
1269 else if (pos < E) 2610 else if (pos < E)
1270 { 2611 {
1271 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2612 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1272 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2613 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1273 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2614 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1274 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2615 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1275 } 2616 }
1276 else 2617 else
1277 break; 2618 break;
1278 2619
1279 if (ANHE_at (he) <= minat) 2620 if (ANHE_at (he) <= minat)
… …
1287 2628
1288 heap [k] = he; 2629 heap [k] = he;
1289 ev_active (ANHE_w (he)) = k; 2630 ev_active (ANHE_w (he)) = k;
1290} 2631}
1291 2632
1292#else /* 4HEAP */ 2633#else /* not 4HEAP */
1293 2634
1294#define HEAP0 1 2635#define HEAP0 1
1295#define HPARENT(k) ((k) >> 1) 2636#define HPARENT(k) ((k) >> 1)
1296#define UPHEAP_DONE(p,k) (!(p)) 2637#define UPHEAP_DONE(p,k) (!(p))
1297 2638
… …
1369 upheap (heap, i + HEAP0); 2710 upheap (heap, i + HEAP0);
1370} 2711}
1371 2712
1372/*****************************************************************************/ 2713/*****************************************************************************/
1373 2714
1374/* associate signal watchers to a signal signal */ 2715/* associate signal watchers to a signal */
1375typedef struct 2716typedef struct
1376{ 2717{
1377 EV_ATOMIC_T pending; 2718 EV_ATOMIC_T pending;
1378#if EV_MULTIPLICITY 2719#if EV_MULTIPLICITY
1379 EV_P; 2720 EV_P;
… …
1385 2726
1386/*****************************************************************************/ 2727/*****************************************************************************/
1387 2728
1388#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2729#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1389 2730
1390static void noinline ecb_cold 2731ecb_noinline ecb_cold
2732static void
1391evpipe_init (EV_P) 2733evpipe_init (EV_P)
1392{ 2734{
1393 if (!ev_is_active (&pipe_w)) 2735 if (!ev_is_active (&pipe_w))
1394 { 2736 {
2737 int fds [2];
2738
1395# if EV_USE_EVENTFD 2739# if EV_USE_EVENTFD
2740 fds [0] = -1;
1396 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2741 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1397 if (evfd < 0 && errno == EINVAL) 2742 if (fds [1] < 0 && errno == EINVAL)
1398 evfd = eventfd (0, 0); 2743 fds [1] = eventfd (0, 0);
1399 2744
1400 if (evfd >= 0) 2745 if (fds [1] < 0)
2746# endif
1401 { 2747 {
2748 while (pipe (fds))
2749 ev_syserr ("(libev) error creating signal/async pipe");
2750
2751 fd_intern (fds [0]);
2752 }
2753
1402 evpipe [0] = -1; 2754 evpipe [0] = fds [0];
1403 fd_intern (evfd); /* doing it twice doesn't hurt */ 2755
1404 ev_io_set (&pipe_w, evfd, EV_READ); 2756 if (evpipe [1] < 0)
2757 evpipe [1] = fds [1]; /* first call, set write fd */
2758 else
2759 {
2760 /* on subsequent calls, do not change evpipe [1] */
2761 /* so that evpipe_write can always rely on its value. */
2762 /* this branch does not do anything sensible on windows, */
2763 /* so must not be executed on windows */
2764
2765 dup2 (fds [1], evpipe [1]);
2766 close (fds [1]);
2767 }
2768
2769 fd_intern (evpipe [1]);
2770
2771 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2772 ev_io_start (EV_A_ &pipe_w);
2773 ev_unref (EV_A); /* watcher should not keep loop alive */
2774 }
2775}
2776
2777inline_speed void
2778evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2779{
2780 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2781
2782 if (ecb_expect_true (*flag))
2783 return;
2784
2785 *flag = 1;
2786 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2787
2788 pipe_write_skipped = 1;
2789
2790 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2791
2792 if (pipe_write_wanted)
2793 {
2794 int old_errno;
2795
2796 pipe_write_skipped = 0;
2797 ECB_MEMORY_FENCE_RELEASE;
2798
2799 old_errno = errno; /* save errno because write will clobber it */
2800
2801#if EV_USE_EVENTFD
2802 if (evpipe [0] < 0)
2803 {
2804 uint64_t counter = 1;
2805 write (evpipe [1], &counter, sizeof (uint64_t));
1405 } 2806 }
1406 else 2807 else
1407# endif 2808#endif
1408 { 2809 {
1409 while (pipe (evpipe)) 2810#ifdef _WIN32
1410 ev_syserr ("(libev) error creating signal/async pipe"); 2811 WSABUF buf;
1411 2812 DWORD sent;
1412 fd_intern (evpipe [0]); 2813 buf.buf = (char *)&buf;
1413 fd_intern (evpipe [1]); 2814 buf.len = 1;
1414 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2815 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2816#else
2817 write (evpipe [1], &(evpipe [1]), 1);
2818#endif
1415 } 2819 }
1416 2820
1417 ev_io_start (EV_A_ &pipe_w);
1418 ev_unref (EV_A); /* watcher should not keep loop alive */
1419 }
1420}
1421
1422inline_speed void
1423evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1424{
1425 if (!*flag)
1426 {
1427 *flag = 1;
1428
1429 pipe_write_skipped = 1;
1430
1431 if (pipe_write_wanted)
1432 {
1433 int old_errno;
1434
1435 pipe_write_skipped = 0;
1436
1437 old_errno = errno; /* save errno because write will clobber it */
1438
1439#if EV_USE_EVENTFD
1440 if (evfd >= 0)
1441 {
1442 uint64_t counter = 1;
1443 write (evfd, &counter, sizeof (uint64_t));
1444 }
1445 else
1446#endif
1447 {
1448 /* win32 people keep sending patches that change this write() to send() */
1449 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1450 /* so when you think this write should be a send instead, please find out */
1451 /* where your send() is from - it's definitely not the microsoft send, and */
1452 /* tell me. thank you. */
1453 write (evpipe [1], &(evpipe [1]), 1);
1454 }
1455
1456 errno = old_errno; 2821 errno = old_errno;
1457 }
1458 } 2822 }
1459} 2823}
1460 2824
1461/* called whenever the libev signal pipe */ 2825/* called whenever the libev signal pipe */
1462/* got some events (signal, async) */ 2826/* got some events (signal, async) */
… …
1466 int i; 2830 int i;
1467 2831
1468 if (revents & EV_READ) 2832 if (revents & EV_READ)
1469 { 2833 {
1470#if EV_USE_EVENTFD 2834#if EV_USE_EVENTFD
1471 if (evfd >= 0) 2835 if (evpipe [0] < 0)
1472 { 2836 {
1473 uint64_t counter; 2837 uint64_t counter;
1474 read (evfd, &counter, sizeof (uint64_t)); 2838 read (evpipe [1], &counter, sizeof (uint64_t));
1475 } 2839 }
1476 else 2840 else
1477#endif 2841#endif
1478 { 2842 {
1479 char dummy; 2843 char dummy[4];
1480 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2844#ifdef _WIN32
2845 WSABUF buf;
2846 DWORD recvd;
2847 DWORD flags = 0;
2848 buf.buf = dummy;
2849 buf.len = sizeof (dummy);
2850 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2851#else
1481 read (evpipe [0], &dummy, 1); 2852 read (evpipe [0], &dummy, sizeof (dummy));
2853#endif
1482 } 2854 }
1483 } 2855 }
1484 2856
1485 pipe_write_skipped = 0; 2857 pipe_write_skipped = 0;
2858
2859 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1486 2860
1487#if EV_SIGNAL_ENABLE 2861#if EV_SIGNAL_ENABLE
1488 if (sig_pending) 2862 if (sig_pending)
1489 { 2863 {
1490 sig_pending = 0; 2864 sig_pending = 0;
1491 2865
2866 ECB_MEMORY_FENCE;
2867
1492 for (i = EV_NSIG - 1; i--; ) 2868 for (i = EV_NSIG - 1; i--; )
1493 if (expect_false (signals [i].pending)) 2869 if (ecb_expect_false (signals [i].pending))
1494 ev_feed_signal_event (EV_A_ i + 1); 2870 ev_feed_signal_event (EV_A_ i + 1);
1495 } 2871 }
1496#endif 2872#endif
1497 2873
1498#if EV_ASYNC_ENABLE 2874#if EV_ASYNC_ENABLE
1499 if (async_pending) 2875 if (async_pending)
1500 { 2876 {
1501 async_pending = 0; 2877 async_pending = 0;
2878
2879 ECB_MEMORY_FENCE;
1502 2880
1503 for (i = asynccnt; i--; ) 2881 for (i = asynccnt; i--; )
1504 if (asyncs [i]->sent) 2882 if (asyncs [i]->sent)
1505 { 2883 {
1506 asyncs [i]->sent = 0; 2884 asyncs [i]->sent = 0;
2885 ECB_MEMORY_FENCE_RELEASE;
1507 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2886 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1508 } 2887 }
1509 } 2888 }
1510#endif 2889#endif
1511} 2890}
1512 2891
1513/*****************************************************************************/ 2892/*****************************************************************************/
1514 2893
1515void 2894void
1516ev_feed_signal (int signum) 2895ev_feed_signal (int signum) EV_NOEXCEPT
1517{ 2896{
1518#if EV_MULTIPLICITY 2897#if EV_MULTIPLICITY
2898 EV_P;
2899 ECB_MEMORY_FENCE_ACQUIRE;
1519 EV_P = signals [signum - 1].loop; 2900 EV_A = signals [signum - 1].loop;
1520 2901
1521 if (!EV_A) 2902 if (!EV_A)
1522 return; 2903 return;
1523#endif 2904#endif
1524 2905
1525 evpipe_init (EV_A);
1526
1527 signals [signum - 1].pending = 1; 2906 signals [signum - 1].pending = 1;
1528 evpipe_write (EV_A_ &sig_pending); 2907 evpipe_write (EV_A_ &sig_pending);
1529} 2908}
1530 2909
1531static void 2910static void
… …
1536#endif 2915#endif
1537 2916
1538 ev_feed_signal (signum); 2917 ev_feed_signal (signum);
1539} 2918}
1540 2919
1541void noinline 2920ecb_noinline
2921void
1542ev_feed_signal_event (EV_P_ int signum) 2922ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1543{ 2923{
1544 WL w; 2924 WL w;
1545 2925
1546 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2926 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1547 return; 2927 return;
1548 2928
1549 --signum; 2929 --signum;
1550 2930
1551#if EV_MULTIPLICITY 2931#if EV_MULTIPLICITY
1552 /* it is permissible to try to feed a signal to the wrong loop */ 2932 /* it is permissible to try to feed a signal to the wrong loop */
1553 /* or, likely more useful, feeding a signal nobody is waiting for */ 2933 /* or, likely more useful, feeding a signal nobody is waiting for */
1554 2934
1555 if (expect_false (signals [signum].loop != EV_A)) 2935 if (ecb_expect_false (signals [signum].loop != EV_A))
1556 return; 2936 return;
1557#endif 2937#endif
1558 2938
1559 signals [signum].pending = 0; 2939 signals [signum].pending = 0;
2940 ECB_MEMORY_FENCE_RELEASE;
1560 2941
1561 for (w = signals [signum].head; w; w = w->next) 2942 for (w = signals [signum].head; w; w = w->next)
1562 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2943 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1563} 2944}
1564 2945
… …
1643 3024
1644#endif 3025#endif
1645 3026
1646/*****************************************************************************/ 3027/*****************************************************************************/
1647 3028
3029#if EV_USE_TIMERFD
3030
3031static void periodics_reschedule (EV_P);
3032
3033static void
3034timerfdcb (EV_P_ ev_io *iow, int revents)
3035{
3036 struct itimerspec its = { 0 };
3037
3038 its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2;
3039 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
3040
3041 ev_rt_now = ev_time ();
3042 /* periodics_reschedule only needs ev_rt_now */
3043 /* but maybe in the future we want the full treatment. */
3044 /*
3045 now_floor = EV_TS_CONST (0.);
3046 time_update (EV_A_ EV_TSTAMP_HUGE);
3047 */
3048#if EV_PERIODIC_ENABLE
3049 periodics_reschedule (EV_A);
3050#endif
3051}
3052
3053ecb_noinline ecb_cold
3054static void
3055evtimerfd_init (EV_P)
3056{
3057 if (!ev_is_active (&timerfd_w))
3058 {
3059 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
3060
3061 if (timerfd >= 0)
3062 {
3063 fd_intern (timerfd); /* just to be sure */
3064
3065 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
3066 ev_set_priority (&timerfd_w, EV_MINPRI);
3067 ev_io_start (EV_A_ &timerfd_w);
3068 ev_unref (EV_A); /* watcher should not keep loop alive */
3069
3070 /* (re-) arm timer */
3071 timerfdcb (EV_A_ 0, 0);
3072 }
3073 }
3074}
3075
3076#endif
3077
3078/*****************************************************************************/
3079
1648#if EV_USE_IOCP 3080#if EV_USE_IOCP
1649# include "ev_iocp.c" 3081# include "ev_iocp.c"
1650#endif 3082#endif
1651#if EV_USE_PORT 3083#if EV_USE_PORT
1652# include "ev_port.c" 3084# include "ev_port.c"
… …
1655# include "ev_kqueue.c" 3087# include "ev_kqueue.c"
1656#endif 3088#endif
1657#if EV_USE_EPOLL 3089#if EV_USE_EPOLL
1658# include "ev_epoll.c" 3090# include "ev_epoll.c"
1659#endif 3091#endif
3092#if EV_USE_LINUXAIO
3093# include "ev_linuxaio.c"
3094#endif
3095#if EV_USE_IOURING
3096# include "ev_iouring.c"
3097#endif
1660#if EV_USE_POLL 3098#if EV_USE_POLL
1661# include "ev_poll.c" 3099# include "ev_poll.c"
1662#endif 3100#endif
1663#if EV_USE_SELECT 3101#if EV_USE_SELECT
1664# include "ev_select.c" 3102# include "ev_select.c"
1665#endif 3103#endif
1666 3104
1667int ecb_cold 3105ecb_cold int
1668ev_version_major (void) 3106ev_version_major (void) EV_NOEXCEPT
1669{ 3107{
1670 return EV_VERSION_MAJOR; 3108 return EV_VERSION_MAJOR;
1671} 3109}
1672 3110
1673int ecb_cold 3111ecb_cold int
1674ev_version_minor (void) 3112ev_version_minor (void) EV_NOEXCEPT
1675{ 3113{
1676 return EV_VERSION_MINOR; 3114 return EV_VERSION_MINOR;
1677} 3115}
1678 3116
1679/* return true if we are running with elevated privileges and should ignore env variables */ 3117/* return true if we are running with elevated privileges and should ignore env variables */
1680int inline_size ecb_cold 3118inline_size ecb_cold int
1681enable_secure (void) 3119enable_secure (void)
1682{ 3120{
1683#ifdef _WIN32 3121#ifdef _WIN32
1684 return 0; 3122 return 0;
1685#else 3123#else
1686 return getuid () != geteuid () 3124 return getuid () != geteuid ()
1687 || getgid () != getegid (); 3125 || getgid () != getegid ();
1688#endif 3126#endif
1689} 3127}
1690 3128
1691unsigned int ecb_cold 3129ecb_cold
3130unsigned int
1692ev_supported_backends (void) 3131ev_supported_backends (void) EV_NOEXCEPT
1693{ 3132{
1694 unsigned int flags = 0; 3133 unsigned int flags = 0;
1695 3134
1696 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3135 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1697 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3136 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1698 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3137 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1699 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3138 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1700 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3139 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1701 3140 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3141 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3142
1702 return flags; 3143 return flags;
1703} 3144}
1704 3145
1705unsigned int ecb_cold 3146ecb_cold
3147unsigned int
1706ev_recommended_backends (void) 3148ev_recommended_backends (void) EV_NOEXCEPT
1707{ 3149{
1708 unsigned int flags = ev_supported_backends (); 3150 unsigned int flags = ev_supported_backends ();
1709 3151
1710#ifndef __NetBSD__ 3152#ifndef __NetBSD__
1711 /* kqueue is borked on everything but netbsd apparently */ 3153 /* kqueue is borked on everything but netbsd apparently */
… …
1719#endif 3161#endif
1720#ifdef __FreeBSD__ 3162#ifdef __FreeBSD__
1721 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 3163 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1722#endif 3164#endif
1723 3165
3166 /* TODO: linuxaio is very experimental */
3167#if !EV_RECOMMEND_LINUXAIO
3168 flags &= ~EVBACKEND_LINUXAIO;
3169#endif
3170 /* TODO: linuxaio is super experimental */
3171#if !EV_RECOMMEND_IOURING
3172 flags &= ~EVBACKEND_IOURING;
3173#endif
3174
1724 return flags; 3175 return flags;
1725} 3176}
1726 3177
1727unsigned int ecb_cold 3178ecb_cold
3179unsigned int
1728ev_embeddable_backends (void) 3180ev_embeddable_backends (void) EV_NOEXCEPT
1729{ 3181{
1730 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3182 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
1731 3183
1732 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 3184 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1733 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 3185 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1734 flags &= ~EVBACKEND_EPOLL; 3186 flags &= ~EVBACKEND_EPOLL;
1735 3187
3188 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
3189
1736 return flags; 3190 return flags;
1737} 3191}
1738 3192
1739unsigned int 3193unsigned int
1740ev_backend (EV_P) 3194ev_backend (EV_P) EV_NOEXCEPT
1741{ 3195{
1742 return backend; 3196 return backend;
1743} 3197}
1744 3198
1745#if EV_FEATURE_API 3199#if EV_FEATURE_API
1746unsigned int 3200unsigned int
1747ev_iteration (EV_P) 3201ev_iteration (EV_P) EV_NOEXCEPT
1748{ 3202{
1749 return loop_count; 3203 return loop_count;
1750} 3204}
1751 3205
1752unsigned int 3206unsigned int
1753ev_depth (EV_P) 3207ev_depth (EV_P) EV_NOEXCEPT
1754{ 3208{
1755 return loop_depth; 3209 return loop_depth;
1756} 3210}
1757 3211
1758void 3212void
1759ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3213ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1760{ 3214{
1761 io_blocktime = interval; 3215 io_blocktime = interval;
1762} 3216}
1763 3217
1764void 3218void
1765ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3219ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1766{ 3220{
1767 timeout_blocktime = interval; 3221 timeout_blocktime = interval;
1768} 3222}
1769 3223
1770void 3224void
1771ev_set_userdata (EV_P_ void *data) 3225ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1772{ 3226{
1773 userdata = data; 3227 userdata = data;
1774} 3228}
1775 3229
1776void * 3230void *
1777ev_userdata (EV_P) 3231ev_userdata (EV_P) EV_NOEXCEPT
1778{ 3232{
1779 return userdata; 3233 return userdata;
1780} 3234}
1781 3235
1782void 3236void
1783ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 3237ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1784{ 3238{
1785 invoke_cb = invoke_pending_cb; 3239 invoke_cb = invoke_pending_cb;
1786} 3240}
1787 3241
1788void 3242void
1789ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 3243ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1790{ 3244{
1791 release_cb = release; 3245 release_cb = release;
1792 acquire_cb = acquire; 3246 acquire_cb = acquire;
1793} 3247}
1794#endif 3248#endif
1795 3249
1796/* initialise a loop structure, must be zero-initialised */ 3250/* initialise a loop structure, must be zero-initialised */
1797static void noinline ecb_cold 3251ecb_noinline ecb_cold
3252static void
1798loop_init (EV_P_ unsigned int flags) 3253loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1799{ 3254{
1800 if (!backend) 3255 if (!backend)
1801 { 3256 {
1802 origflags = flags; 3257 origflags = flags;
1803 3258
… …
1848#if EV_ASYNC_ENABLE 3303#if EV_ASYNC_ENABLE
1849 async_pending = 0; 3304 async_pending = 0;
1850#endif 3305#endif
1851 pipe_write_skipped = 0; 3306 pipe_write_skipped = 0;
1852 pipe_write_wanted = 0; 3307 pipe_write_wanted = 0;
3308 evpipe [0] = -1;
3309 evpipe [1] = -1;
1853#if EV_USE_INOTIFY 3310#if EV_USE_INOTIFY
1854 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3311 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1855#endif 3312#endif
1856#if EV_USE_SIGNALFD 3313#if EV_USE_SIGNALFD
1857 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3314 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1858#endif 3315#endif
3316#if EV_USE_TIMERFD
3317 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3318#endif
1859 3319
1860 if (!(flags & EVBACKEND_MASK)) 3320 if (!(flags & EVBACKEND_MASK))
1861 flags |= ev_recommended_backends (); 3321 flags |= ev_recommended_backends ();
1862 3322
1863#if EV_USE_IOCP 3323#if EV_USE_IOCP
1864 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 3324 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1865#endif 3325#endif
1866#if EV_USE_PORT 3326#if EV_USE_PORT
1867 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3327 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1868#endif 3328#endif
1869#if EV_USE_KQUEUE 3329#if EV_USE_KQUEUE
1870 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3330 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3331#endif
3332#if EV_USE_IOURING
3333 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3334#endif
3335#if EV_USE_LINUXAIO
3336 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1871#endif 3337#endif
1872#if EV_USE_EPOLL 3338#if EV_USE_EPOLL
1873 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3339 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1874#endif 3340#endif
1875#if EV_USE_POLL 3341#if EV_USE_POLL
1876 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3342 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1877#endif 3343#endif
1878#if EV_USE_SELECT 3344#if EV_USE_SELECT
1879 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3345 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1880#endif 3346#endif
1881 3347
1882 ev_prepare_init (&pending_w, pendingcb); 3348 ev_prepare_init (&pending_w, pendingcb);
1883 3349
1884#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3350#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1887#endif 3353#endif
1888 } 3354 }
1889} 3355}
1890 3356
1891/* free up a loop structure */ 3357/* free up a loop structure */
1892void ecb_cold 3358ecb_cold
3359void
1893ev_loop_destroy (EV_P) 3360ev_loop_destroy (EV_P)
1894{ 3361{
1895 int i; 3362 int i;
1896 3363
1897#if EV_MULTIPLICITY 3364#if EV_MULTIPLICITY
… …
1900 return; 3367 return;
1901#endif 3368#endif
1902 3369
1903#if EV_CLEANUP_ENABLE 3370#if EV_CLEANUP_ENABLE
1904 /* queue cleanup watchers (and execute them) */ 3371 /* queue cleanup watchers (and execute them) */
1905 if (expect_false (cleanupcnt)) 3372 if (ecb_expect_false (cleanupcnt))
1906 { 3373 {
1907 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); 3374 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1908 EV_INVOKE_PENDING; 3375 EV_INVOKE_PENDING;
1909 } 3376 }
1910#endif 3377#endif
1911 3378
1912#if EV_CHILD_ENABLE 3379#if EV_CHILD_ENABLE
1913 if (ev_is_active (&childev)) 3380 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1914 { 3381 {
1915 ev_ref (EV_A); /* child watcher */ 3382 ev_ref (EV_A); /* child watcher */
1916 ev_signal_stop (EV_A_ &childev); 3383 ev_signal_stop (EV_A_ &childev);
1917 } 3384 }
1918#endif 3385#endif
… …
1920 if (ev_is_active (&pipe_w)) 3387 if (ev_is_active (&pipe_w))
1921 { 3388 {
1922 /*ev_ref (EV_A);*/ 3389 /*ev_ref (EV_A);*/
1923 /*ev_io_stop (EV_A_ &pipe_w);*/ 3390 /*ev_io_stop (EV_A_ &pipe_w);*/
1924 3391
1925#if EV_USE_EVENTFD
1926 if (evfd >= 0)
1927 close (evfd);
1928#endif
1929
1930 if (evpipe [0] >= 0)
1931 {
1932 EV_WIN32_CLOSE_FD (evpipe [0]); 3392 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1933 EV_WIN32_CLOSE_FD (evpipe [1]); 3393 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1934 }
1935 } 3394 }
1936 3395
1937#if EV_USE_SIGNALFD 3396#if EV_USE_SIGNALFD
1938 if (ev_is_active (&sigfd_w)) 3397 if (ev_is_active (&sigfd_w))
1939 close (sigfd); 3398 close (sigfd);
1940#endif 3399#endif
1941 3400
3401#if EV_USE_TIMERFD
3402 if (ev_is_active (&timerfd_w))
3403 close (timerfd);
3404#endif
3405
1942#if EV_USE_INOTIFY 3406#if EV_USE_INOTIFY
1943 if (fs_fd >= 0) 3407 if (fs_fd >= 0)
1944 close (fs_fd); 3408 close (fs_fd);
1945#endif 3409#endif
1946 3410
1947 if (backend_fd >= 0) 3411 if (backend_fd >= 0)
1948 close (backend_fd); 3412 close (backend_fd);
1949 3413
1950#if EV_USE_IOCP 3414#if EV_USE_IOCP
1951 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); 3415 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1952#endif 3416#endif
1953#if EV_USE_PORT 3417#if EV_USE_PORT
1954 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3418 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1955#endif 3419#endif
1956#if EV_USE_KQUEUE 3420#if EV_USE_KQUEUE
1957 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3421 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3422#endif
3423#if EV_USE_IOURING
3424 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3425#endif
3426#if EV_USE_LINUXAIO
3427 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1958#endif 3428#endif
1959#if EV_USE_EPOLL 3429#if EV_USE_EPOLL
1960 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3430 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1961#endif 3431#endif
1962#if EV_USE_POLL 3432#if EV_USE_POLL
1963 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3433 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1964#endif 3434#endif
1965#if EV_USE_SELECT 3435#if EV_USE_SELECT
1966 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3436 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1967#endif 3437#endif
1968 3438
1969 for (i = NUMPRI; i--; ) 3439 for (i = NUMPRI; i--; )
1970 { 3440 {
1971 array_free (pending, [i]); 3441 array_free (pending, [i]);
… …
2013 3483
2014inline_size void 3484inline_size void
2015loop_fork (EV_P) 3485loop_fork (EV_P)
2016{ 3486{
2017#if EV_USE_PORT 3487#if EV_USE_PORT
2018 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3488 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2019#endif 3489#endif
2020#if EV_USE_KQUEUE 3490#if EV_USE_KQUEUE
2021 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3491 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3492#endif
3493#if EV_USE_IOURING
3494 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3495#endif
3496#if EV_USE_LINUXAIO
3497 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
2022#endif 3498#endif
2023#if EV_USE_EPOLL 3499#if EV_USE_EPOLL
2024 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3500 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2025#endif 3501#endif
2026#if EV_USE_INOTIFY 3502#if EV_USE_INOTIFY
2027 infy_fork (EV_A); 3503 infy_fork (EV_A);
2028#endif 3504#endif
2029 3505
3506 if (postfork != 2)
3507 {
3508 #if EV_USE_SIGNALFD
3509 /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */
3510 #endif
3511
3512 #if EV_USE_TIMERFD
3513 if (ev_is_active (&timerfd_w))
3514 {
3515 ev_ref (EV_A);
3516 ev_io_stop (EV_A_ &timerfd_w);
3517
3518 close (timerfd);
3519 timerfd = -2;
3520
3521 evtimerfd_init (EV_A);
3522 /* reschedule periodics, in case we missed something */
3523 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
3524 }
3525 #endif
3526
3527 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2030 if (ev_is_active (&pipe_w)) 3528 if (ev_is_active (&pipe_w))
2031 { 3529 {
2032 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 3530 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2033 3531
2034 ev_ref (EV_A); 3532 ev_ref (EV_A);
2035 ev_io_stop (EV_A_ &pipe_w); 3533 ev_io_stop (EV_A_ &pipe_w);
2036 3534
2037#if EV_USE_EVENTFD
2038 if (evfd >= 0)
2039 close (evfd);
2040#endif
2041
2042 if (evpipe [0] >= 0) 3535 if (evpipe [0] >= 0)
2043 {
2044 EV_WIN32_CLOSE_FD (evpipe [0]); 3536 EV_WIN32_CLOSE_FD (evpipe [0]);
2045 EV_WIN32_CLOSE_FD (evpipe [1]); 3537
3538 evpipe_init (EV_A);
3539 /* iterate over everything, in case we missed something before */
3540 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2046 } 3541 }
2047 3542 #endif
2048#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2049 evpipe_init (EV_A);
2050 /* now iterate over everything, in case we missed something */
2051 pipecb (EV_A_ &pipe_w, EV_READ);
2052#endif
2053 } 3543 }
2054 3544
2055 postfork = 0; 3545 postfork = 0;
2056} 3546}
2057 3547
2058#if EV_MULTIPLICITY 3548#if EV_MULTIPLICITY
2059 3549
3550ecb_cold
2060struct ev_loop * ecb_cold 3551struct ev_loop *
2061ev_loop_new (unsigned int flags) 3552ev_loop_new (unsigned int flags) EV_NOEXCEPT
2062{ 3553{
2063 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3554 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2064 3555
2065 memset (EV_A, 0, sizeof (struct ev_loop)); 3556 memset (EV_A, 0, sizeof (struct ev_loop));
2066 loop_init (EV_A_ flags); 3557 loop_init (EV_A_ flags);
… …
2073} 3564}
2074 3565
2075#endif /* multiplicity */ 3566#endif /* multiplicity */
2076 3567
2077#if EV_VERIFY 3568#if EV_VERIFY
2078static void noinline ecb_cold 3569ecb_noinline ecb_cold
3570static void
2079verify_watcher (EV_P_ W w) 3571verify_watcher (EV_P_ W w)
2080{ 3572{
2081 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3573 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2082 3574
2083 if (w->pending) 3575 if (w->pending)
2084 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3576 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2085} 3577}
2086 3578
2087static void noinline ecb_cold 3579ecb_noinline ecb_cold
3580static void
2088verify_heap (EV_P_ ANHE *heap, int N) 3581verify_heap (EV_P_ ANHE *heap, int N)
2089{ 3582{
2090 int i; 3583 int i;
2091 3584
2092 for (i = HEAP0; i < N + HEAP0; ++i) 3585 for (i = HEAP0; i < N + HEAP0; ++i)
… …
2097 3590
2098 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3591 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2099 } 3592 }
2100} 3593}
2101 3594
2102static void noinline ecb_cold 3595ecb_noinline ecb_cold
3596static void
2103array_verify (EV_P_ W *ws, int cnt) 3597array_verify (EV_P_ W *ws, int cnt)
2104{ 3598{
2105 while (cnt--) 3599 while (cnt--)
2106 { 3600 {
2107 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
2110} 3604}
2111#endif 3605#endif
2112 3606
2113#if EV_FEATURE_API 3607#if EV_FEATURE_API
2114void ecb_cold 3608void ecb_cold
2115ev_verify (EV_P) 3609ev_verify (EV_P) EV_NOEXCEPT
2116{ 3610{
2117#if EV_VERIFY 3611#if EV_VERIFY
2118 int i; 3612 int i;
2119 WL w; 3613 WL w, w2;
2120 3614
2121 assert (activecnt >= -1); 3615 assert (activecnt >= -1);
2122 3616
2123 assert (fdchangemax >= fdchangecnt); 3617 assert (fdchangemax >= fdchangecnt);
2124 for (i = 0; i < fdchangecnt; ++i) 3618 for (i = 0; i < fdchangecnt; ++i)
2125 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3619 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2126 3620
2127 assert (anfdmax >= 0); 3621 assert (anfdmax >= 0);
2128 for (i = 0; i < anfdmax; ++i) 3622 for (i = 0; i < anfdmax; ++i)
3623 {
3624 int j = 0;
3625
2129 for (w = anfds [i].head; w; w = w->next) 3626 for (w = w2 = anfds [i].head; w; w = w->next)
2130 { 3627 {
2131 verify_watcher (EV_A_ (W)w); 3628 verify_watcher (EV_A_ (W)w);
3629
3630 if (j++ & 1)
3631 {
3632 assert (("libev: io watcher list contains a loop", w != w2));
3633 w2 = w2->next;
3634 }
3635
2132 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3636 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2133 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3637 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2134 } 3638 }
3639 }
2135 3640
2136 assert (timermax >= timercnt); 3641 assert (timermax >= timercnt);
2137 verify_heap (EV_A_ timers, timercnt); 3642 verify_heap (EV_A_ timers, timercnt);
2138 3643
2139#if EV_PERIODIC_ENABLE 3644#if EV_PERIODIC_ENABLE
… …
2185#endif 3690#endif
2186} 3691}
2187#endif 3692#endif
2188 3693
2189#if EV_MULTIPLICITY 3694#if EV_MULTIPLICITY
3695ecb_cold
2190struct ev_loop * ecb_cold 3696struct ev_loop *
2191#else 3697#else
2192int 3698int
2193#endif 3699#endif
2194ev_default_loop (unsigned int flags) 3700ev_default_loop (unsigned int flags) EV_NOEXCEPT
2195{ 3701{
2196 if (!ev_default_loop_ptr) 3702 if (!ev_default_loop_ptr)
2197 { 3703 {
2198#if EV_MULTIPLICITY 3704#if EV_MULTIPLICITY
2199 EV_P = ev_default_loop_ptr = &default_loop_struct; 3705 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2218 3724
2219 return ev_default_loop_ptr; 3725 return ev_default_loop_ptr;
2220} 3726}
2221 3727
2222void 3728void
2223ev_loop_fork (EV_P) 3729ev_loop_fork (EV_P) EV_NOEXCEPT
2224{ 3730{
2225 postfork = 1; /* must be in line with ev_default_fork */ 3731 postfork = 1;
2226} 3732}
2227 3733
2228/*****************************************************************************/ 3734/*****************************************************************************/
2229 3735
2230void 3736void
… …
2232{ 3738{
2233 EV_CB_INVOKE ((W)w, revents); 3739 EV_CB_INVOKE ((W)w, revents);
2234} 3740}
2235 3741
2236unsigned int 3742unsigned int
2237ev_pending_count (EV_P) 3743ev_pending_count (EV_P) EV_NOEXCEPT
2238{ 3744{
2239 int pri; 3745 int pri;
2240 unsigned int count = 0; 3746 unsigned int count = 0;
2241 3747
2242 for (pri = NUMPRI; pri--; ) 3748 for (pri = NUMPRI; pri--; )
2243 count += pendingcnt [pri]; 3749 count += pendingcnt [pri];
2244 3750
2245 return count; 3751 return count;
2246} 3752}
2247 3753
2248void noinline 3754ecb_noinline
3755void
2249ev_invoke_pending (EV_P) 3756ev_invoke_pending (EV_P)
2250{ 3757{
2251 int pri; 3758 pendingpri = NUMPRI;
2252 3759
2253 for (pri = NUMPRI; pri--; ) 3760 do
3761 {
3762 --pendingpri;
3763
3764 /* pendingpri possibly gets modified in the inner loop */
2254 while (pendingcnt [pri]) 3765 while (pendingcnt [pendingpri])
2255 { 3766 {
2256 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3767 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2257 3768
2258 p->w->pending = 0; 3769 p->w->pending = 0;
2259 EV_CB_INVOKE (p->w, p->events); 3770 EV_CB_INVOKE (p->w, p->events);
2260 EV_FREQUENT_CHECK; 3771 EV_FREQUENT_CHECK;
2261 } 3772 }
3773 }
3774 while (pendingpri);
2262} 3775}
2263 3776
2264#if EV_IDLE_ENABLE 3777#if EV_IDLE_ENABLE
2265/* make idle watchers pending. this handles the "call-idle */ 3778/* make idle watchers pending. this handles the "call-idle */
2266/* only when higher priorities are idle" logic */ 3779/* only when higher priorities are idle" logic */
2267inline_size void 3780inline_size void
2268idle_reify (EV_P) 3781idle_reify (EV_P)
2269{ 3782{
2270 if (expect_false (idleall)) 3783 if (ecb_expect_false (idleall))
2271 { 3784 {
2272 int pri; 3785 int pri;
2273 3786
2274 for (pri = NUMPRI; pri--; ) 3787 for (pri = NUMPRI; pri--; )
2275 { 3788 {
… …
2305 { 3818 {
2306 ev_at (w) += w->repeat; 3819 ev_at (w) += w->repeat;
2307 if (ev_at (w) < mn_now) 3820 if (ev_at (w) < mn_now)
2308 ev_at (w) = mn_now; 3821 ev_at (w) = mn_now;
2309 3822
2310 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3823 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
2311 3824
2312 ANHE_at_cache (timers [HEAP0]); 3825 ANHE_at_cache (timers [HEAP0]);
2313 downheap (timers, timercnt, HEAP0); 3826 downheap (timers, timercnt, HEAP0);
2314 } 3827 }
2315 else 3828 else
… …
2324 } 3837 }
2325} 3838}
2326 3839
2327#if EV_PERIODIC_ENABLE 3840#if EV_PERIODIC_ENABLE
2328 3841
2329static void noinline 3842ecb_noinline
3843static void
2330periodic_recalc (EV_P_ ev_periodic *w) 3844periodic_recalc (EV_P_ ev_periodic *w)
2331{ 3845{
2332 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; 3846 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2333 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); 3847 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2334 3848
… …
2336 while (at <= ev_rt_now) 3850 while (at <= ev_rt_now)
2337 { 3851 {
2338 ev_tstamp nat = at + w->interval; 3852 ev_tstamp nat = at + w->interval;
2339 3853
2340 /* when resolution fails us, we use ev_rt_now */ 3854 /* when resolution fails us, we use ev_rt_now */
2341 if (expect_false (nat == at)) 3855 if (ecb_expect_false (nat == at))
2342 { 3856 {
2343 at = ev_rt_now; 3857 at = ev_rt_now;
2344 break; 3858 break;
2345 } 3859 }
2346 3860
… …
2356{ 3870{
2357 EV_FREQUENT_CHECK; 3871 EV_FREQUENT_CHECK;
2358 3872
2359 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2360 { 3874 {
2361 int feed_count = 0;
2362
2363 do 3875 do
2364 { 3876 {
2365 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3877 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2366 3878
2367 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3879 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2394 } 3906 }
2395} 3907}
2396 3908
2397/* simply recalculate all periodics */ 3909/* simply recalculate all periodics */
2398/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3910/* TODO: maybe ensure that at least one event happens when jumping forward? */
2399static void noinline ecb_cold 3911ecb_noinline ecb_cold
3912static void
2400periodics_reschedule (EV_P) 3913periodics_reschedule (EV_P)
2401{ 3914{
2402 int i; 3915 int i;
2403 3916
2404 /* adjust periodics after time jump */ 3917 /* adjust periodics after time jump */
… …
2417 reheap (periodics, periodiccnt); 3930 reheap (periodics, periodiccnt);
2418} 3931}
2419#endif 3932#endif
2420 3933
2421/* adjust all timers by a given offset */ 3934/* adjust all timers by a given offset */
2422static void noinline ecb_cold 3935ecb_noinline ecb_cold
3936static void
2423timers_reschedule (EV_P_ ev_tstamp adjust) 3937timers_reschedule (EV_P_ ev_tstamp adjust)
2424{ 3938{
2425 int i; 3939 int i;
2426 3940
2427 for (i = 0; i < timercnt; ++i) 3941 for (i = 0; i < timercnt; ++i)
… …
2436/* also detect if there was a timejump, and act accordingly */ 3950/* also detect if there was a timejump, and act accordingly */
2437inline_speed void 3951inline_speed void
2438time_update (EV_P_ ev_tstamp max_block) 3952time_update (EV_P_ ev_tstamp max_block)
2439{ 3953{
2440#if EV_USE_MONOTONIC 3954#if EV_USE_MONOTONIC
2441 if (expect_true (have_monotonic)) 3955 if (ecb_expect_true (have_monotonic))
2442 { 3956 {
2443 int i; 3957 int i;
2444 ev_tstamp odiff = rtmn_diff; 3958 ev_tstamp odiff = rtmn_diff;
2445 3959
2446 mn_now = get_clock (); 3960 mn_now = get_clock ();
2447 3961
2448 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3962 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2449 /* interpolate in the meantime */ 3963 /* interpolate in the meantime */
2450 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3964 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
2451 { 3965 {
2452 ev_rt_now = rtmn_diff + mn_now; 3966 ev_rt_now = rtmn_diff + mn_now;
2453 return; 3967 return;
2454 } 3968 }
2455 3969
… …
2469 ev_tstamp diff; 3983 ev_tstamp diff;
2470 rtmn_diff = ev_rt_now - mn_now; 3984 rtmn_diff = ev_rt_now - mn_now;
2471 3985
2472 diff = odiff - rtmn_diff; 3986 diff = odiff - rtmn_diff;
2473 3987
2474 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP)) 3988 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
2475 return; /* all is well */ 3989 return; /* all is well */
2476 3990
2477 ev_rt_now = ev_time (); 3991 ev_rt_now = ev_time ();
2478 mn_now = get_clock (); 3992 mn_now = get_clock ();
2479 now_floor = mn_now; 3993 now_floor = mn_now;
… …
2488 else 4002 else
2489#endif 4003#endif
2490 { 4004 {
2491 ev_rt_now = ev_time (); 4005 ev_rt_now = ev_time ();
2492 4006
2493 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 4007 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
2494 { 4008 {
2495 /* adjust timers. this is easy, as the offset is the same for all of them */ 4009 /* adjust timers. this is easy, as the offset is the same for all of them */
2496 timers_reschedule (EV_A_ ev_rt_now - mn_now); 4010 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2497#if EV_PERIODIC_ENABLE 4011#if EV_PERIODIC_ENABLE
2498 periodics_reschedule (EV_A); 4012 periodics_reschedule (EV_A);
… …
2501 4015
2502 mn_now = ev_rt_now; 4016 mn_now = ev_rt_now;
2503 } 4017 }
2504} 4018}
2505 4019
2506void 4020int
2507ev_run (EV_P_ int flags) 4021ev_run (EV_P_ int flags)
2508{ 4022{
2509#if EV_FEATURE_API 4023#if EV_FEATURE_API
2510 ++loop_depth; 4024 ++loop_depth;
2511#endif 4025#endif
… …
2521#if EV_VERIFY >= 2 4035#if EV_VERIFY >= 2
2522 ev_verify (EV_A); 4036 ev_verify (EV_A);
2523#endif 4037#endif
2524 4038
2525#ifndef _WIN32 4039#ifndef _WIN32
2526 if (expect_false (curpid)) /* penalise the forking check even more */ 4040 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2527 if (expect_false (getpid () != curpid)) 4041 if (ecb_expect_false (getpid () != curpid))
2528 { 4042 {
2529 curpid = getpid (); 4043 curpid = getpid ();
2530 postfork = 1; 4044 postfork = 1;
2531 } 4045 }
2532#endif 4046#endif
2533 4047
2534#if EV_FORK_ENABLE 4048#if EV_FORK_ENABLE
2535 /* we might have forked, so queue fork handlers */ 4049 /* we might have forked, so queue fork handlers */
2536 if (expect_false (postfork)) 4050 if (ecb_expect_false (postfork))
2537 if (forkcnt) 4051 if (forkcnt)
2538 { 4052 {
2539 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 4053 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2540 EV_INVOKE_PENDING; 4054 EV_INVOKE_PENDING;
2541 } 4055 }
2542#endif 4056#endif
2543 4057
2544#if EV_PREPARE_ENABLE 4058#if EV_PREPARE_ENABLE
2545 /* queue prepare watchers (and execute them) */ 4059 /* queue prepare watchers (and execute them) */
2546 if (expect_false (preparecnt)) 4060 if (ecb_expect_false (preparecnt))
2547 { 4061 {
2548 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 4062 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2549 EV_INVOKE_PENDING; 4063 EV_INVOKE_PENDING;
2550 } 4064 }
2551#endif 4065#endif
2552 4066
2553 if (expect_false (loop_done)) 4067 if (ecb_expect_false (loop_done))
2554 break; 4068 break;
2555 4069
2556 /* we might have forked, so reify kernel state if necessary */ 4070 /* we might have forked, so reify kernel state if necessary */
2557 if (expect_false (postfork)) 4071 if (ecb_expect_false (postfork))
2558 loop_fork (EV_A); 4072 loop_fork (EV_A);
2559 4073
2560 /* update fd-related kernel structures */ 4074 /* update fd-related kernel structures */
2561 fd_reify (EV_A); 4075 fd_reify (EV_A);
2562 4076
… …
2567 4081
2568 /* remember old timestamp for io_blocktime calculation */ 4082 /* remember old timestamp for io_blocktime calculation */
2569 ev_tstamp prev_mn_now = mn_now; 4083 ev_tstamp prev_mn_now = mn_now;
2570 4084
2571 /* update time to cancel out callback processing overhead */ 4085 /* update time to cancel out callback processing overhead */
2572 time_update (EV_A_ 1e100); 4086 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
2573 4087
2574 /* from now on, we want a pipe-wake-up */ 4088 /* from now on, we want a pipe-wake-up */
2575 pipe_write_wanted = 1; 4089 pipe_write_wanted = 1;
2576 4090
4091 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
4092
2577 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) 4093 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2578 { 4094 {
2579 waittime = MAX_BLOCKTIME; 4095 waittime = EV_TS_CONST (MAX_BLOCKTIME);
4096
4097#if EV_USE_TIMERFD
4098 /* sleep a lot longer when we can reliably detect timejumps */
4099 if (ecb_expect_true (timerfd >= 0))
4100 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4101#endif
4102#if !EV_PERIODIC_ENABLE
4103 /* without periodics but with monotonic clock there is no need */
4104 /* for any time jump detection, so sleep longer */
4105 if (ecb_expect_true (have_monotonic))
4106 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4107#endif
2580 4108
2581 if (timercnt) 4109 if (timercnt)
2582 { 4110 {
2583 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 4111 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2584 if (waittime > to) waittime = to; 4112 if (waittime > to) waittime = to;
… …
2591 if (waittime > to) waittime = to; 4119 if (waittime > to) waittime = to;
2592 } 4120 }
2593#endif 4121#endif
2594 4122
2595 /* don't let timeouts decrease the waittime below timeout_blocktime */ 4123 /* don't let timeouts decrease the waittime below timeout_blocktime */
2596 if (expect_false (waittime < timeout_blocktime)) 4124 if (ecb_expect_false (waittime < timeout_blocktime))
2597 waittime = timeout_blocktime; 4125 waittime = timeout_blocktime;
2598 4126
2599 /* at this point, we NEED to wait, so we have to ensure */ 4127 /* now there are two more special cases left, either we have
2600 /* to pass a minimum nonzero value to the backend */ 4128 * already-expired timers, so we should not sleep, or we have timers
4129 * that expire very soon, in which case we need to wait for a minimum
4130 * amount of time for some event loop backends.
4131 */
2601 if (expect_false (waittime < backend_mintime)) 4132 if (ecb_expect_false (waittime < backend_mintime))
4133 waittime = waittime <= EV_TS_CONST (0.)
4134 ? EV_TS_CONST (0.)
2602 waittime = backend_mintime; 4135 : backend_mintime;
2603 4136
2604 /* extra check because io_blocktime is commonly 0 */ 4137 /* extra check because io_blocktime is commonly 0 */
2605 if (expect_false (io_blocktime)) 4138 if (ecb_expect_false (io_blocktime))
2606 { 4139 {
2607 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4140 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2608 4141
2609 if (sleeptime > waittime - backend_mintime) 4142 if (sleeptime > waittime - backend_mintime)
2610 sleeptime = waittime - backend_mintime; 4143 sleeptime = waittime - backend_mintime;
2611 4144
2612 if (expect_true (sleeptime > 0.)) 4145 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2613 { 4146 {
2614 ev_sleep (sleeptime); 4147 ev_sleep (sleeptime);
2615 waittime -= sleeptime; 4148 waittime -= sleeptime;
2616 } 4149 }
2617 } 4150 }
… …
2622#endif 4155#endif
2623 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 4156 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2624 backend_poll (EV_A_ waittime); 4157 backend_poll (EV_A_ waittime);
2625 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 4158 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2626 4159
2627 pipe_write_wanted = 0; 4160 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2628 4161
4162 ECB_MEMORY_FENCE_ACQUIRE;
2629 if (pipe_write_skipped) 4163 if (pipe_write_skipped)
2630 { 4164 {
2631 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); 4165 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2632 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 4166 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2633 } 4167 }
2634 4168
2635
2636 /* update ev_rt_now, do magic */ 4169 /* update ev_rt_now, do magic */
2637 time_update (EV_A_ waittime + sleeptime); 4170 time_update (EV_A_ waittime + sleeptime);
2638 } 4171 }
2639 4172
2640 /* queue pending timers and reschedule them */ 4173 /* queue pending timers and reschedule them */
… …
2648 idle_reify (EV_A); 4181 idle_reify (EV_A);
2649#endif 4182#endif
2650 4183
2651#if EV_CHECK_ENABLE 4184#if EV_CHECK_ENABLE
2652 /* queue check watchers, to be executed first */ 4185 /* queue check watchers, to be executed first */
2653 if (expect_false (checkcnt)) 4186 if (ecb_expect_false (checkcnt))
2654 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4187 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2655#endif 4188#endif
2656 4189
2657 EV_INVOKE_PENDING; 4190 EV_INVOKE_PENDING;
2658 } 4191 }
2659 while (expect_true ( 4192 while (ecb_expect_true (
2660 activecnt 4193 activecnt
2661 && !loop_done 4194 && !loop_done
2662 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) 4195 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2663 )); 4196 ));
2664 4197
… …
2666 loop_done = EVBREAK_CANCEL; 4199 loop_done = EVBREAK_CANCEL;
2667 4200
2668#if EV_FEATURE_API 4201#if EV_FEATURE_API
2669 --loop_depth; 4202 --loop_depth;
2670#endif 4203#endif
4204
4205 return activecnt;
2671} 4206}
2672 4207
2673void 4208void
2674ev_break (EV_P_ int how) 4209ev_break (EV_P_ int how) EV_NOEXCEPT
2675{ 4210{
2676 loop_done = how; 4211 loop_done = how;
2677} 4212}
2678 4213
2679void 4214void
2680ev_ref (EV_P) 4215ev_ref (EV_P) EV_NOEXCEPT
2681{ 4216{
2682 ++activecnt; 4217 ++activecnt;
2683} 4218}
2684 4219
2685void 4220void
2686ev_unref (EV_P) 4221ev_unref (EV_P) EV_NOEXCEPT
2687{ 4222{
2688 --activecnt; 4223 --activecnt;
2689} 4224}
2690 4225
2691void 4226void
2692ev_now_update (EV_P) 4227ev_now_update (EV_P) EV_NOEXCEPT
2693{ 4228{
2694 time_update (EV_A_ 1e100); 4229 time_update (EV_A_ EV_TSTAMP_HUGE);
2695} 4230}
2696 4231
2697void 4232void
2698ev_suspend (EV_P) 4233ev_suspend (EV_P) EV_NOEXCEPT
2699{ 4234{
2700 ev_now_update (EV_A); 4235 ev_now_update (EV_A);
2701} 4236}
2702 4237
2703void 4238void
2704ev_resume (EV_P) 4239ev_resume (EV_P) EV_NOEXCEPT
2705{ 4240{
2706 ev_tstamp mn_prev = mn_now; 4241 ev_tstamp mn_prev = mn_now;
2707 4242
2708 ev_now_update (EV_A); 4243 ev_now_update (EV_A);
2709 timers_reschedule (EV_A_ mn_now - mn_prev); 4244 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2726inline_size void 4261inline_size void
2727wlist_del (WL *head, WL elem) 4262wlist_del (WL *head, WL elem)
2728{ 4263{
2729 while (*head) 4264 while (*head)
2730 { 4265 {
2731 if (expect_true (*head == elem)) 4266 if (ecb_expect_true (*head == elem))
2732 { 4267 {
2733 *head = elem->next; 4268 *head = elem->next;
2734 break; 4269 break;
2735 } 4270 }
2736 4271
… …
2748 w->pending = 0; 4283 w->pending = 0;
2749 } 4284 }
2750} 4285}
2751 4286
2752int 4287int
2753ev_clear_pending (EV_P_ void *w) 4288ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2754{ 4289{
2755 W w_ = (W)w; 4290 W w_ = (W)w;
2756 int pending = w_->pending; 4291 int pending = w_->pending;
2757 4292
2758 if (expect_true (pending)) 4293 if (ecb_expect_true (pending))
2759 { 4294 {
2760 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4295 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2761 p->w = (W)&pending_w; 4296 p->w = (W)&pending_w;
2762 w_->pending = 0; 4297 w_->pending = 0;
2763 return p->events; 4298 return p->events;
… …
2790 w->active = 0; 4325 w->active = 0;
2791} 4326}
2792 4327
2793/*****************************************************************************/ 4328/*****************************************************************************/
2794 4329
2795void noinline 4330ecb_noinline
4331void
2796ev_io_start (EV_P_ ev_io *w) 4332ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2797{ 4333{
2798 int fd = w->fd; 4334 int fd = w->fd;
2799 4335
2800 if (expect_false (ev_is_active (w))) 4336 if (ecb_expect_false (ev_is_active (w)))
2801 return; 4337 return;
2802 4338
2803 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4339 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2804 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4340 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2805 4341
4342#if EV_VERIFY >= 2
4343 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4344#endif
2806 EV_FREQUENT_CHECK; 4345 EV_FREQUENT_CHECK;
2807 4346
2808 ev_start (EV_A_ (W)w, 1); 4347 ev_start (EV_A_ (W)w, 1);
2809 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4348 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2810 wlist_add (&anfds[fd].head, (WL)w); 4349 wlist_add (&anfds[fd].head, (WL)w);
4350
4351 /* common bug, apparently */
4352 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2811 4353
2812 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4354 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2813 w->events &= ~EV__IOFDSET; 4355 w->events &= ~EV__IOFDSET;
2814 4356
2815 EV_FREQUENT_CHECK; 4357 EV_FREQUENT_CHECK;
2816} 4358}
2817 4359
2818void noinline 4360ecb_noinline
4361void
2819ev_io_stop (EV_P_ ev_io *w) 4362ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2820{ 4363{
2821 clear_pending (EV_A_ (W)w); 4364 clear_pending (EV_A_ (W)w);
2822 if (expect_false (!ev_is_active (w))) 4365 if (ecb_expect_false (!ev_is_active (w)))
2823 return; 4366 return;
2824 4367
2825 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4368 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2826 4369
4370#if EV_VERIFY >= 2
4371 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4372#endif
2827 EV_FREQUENT_CHECK; 4373 EV_FREQUENT_CHECK;
2828 4374
2829 wlist_del (&anfds[w->fd].head, (WL)w); 4375 wlist_del (&anfds[w->fd].head, (WL)w);
2830 ev_stop (EV_A_ (W)w); 4376 ev_stop (EV_A_ (W)w);
2831 4377
2832 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 4378 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2833 4379
2834 EV_FREQUENT_CHECK; 4380 EV_FREQUENT_CHECK;
2835} 4381}
2836 4382
2837void noinline 4383ecb_noinline
4384void
2838ev_timer_start (EV_P_ ev_timer *w) 4385ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2839{ 4386{
2840 if (expect_false (ev_is_active (w))) 4387 if (ecb_expect_false (ev_is_active (w)))
2841 return; 4388 return;
2842 4389
2843 ev_at (w) += mn_now; 4390 ev_at (w) += mn_now;
2844 4391
2845 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4392 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2846 4393
2847 EV_FREQUENT_CHECK; 4394 EV_FREQUENT_CHECK;
2848 4395
2849 ++timercnt; 4396 ++timercnt;
2850 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4397 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2851 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4398 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2852 ANHE_w (timers [ev_active (w)]) = (WT)w; 4399 ANHE_w (timers [ev_active (w)]) = (WT)w;
2853 ANHE_at_cache (timers [ev_active (w)]); 4400 ANHE_at_cache (timers [ev_active (w)]);
2854 upheap (timers, ev_active (w)); 4401 upheap (timers, ev_active (w));
2855 4402
2856 EV_FREQUENT_CHECK; 4403 EV_FREQUENT_CHECK;
2857 4404
2858 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4405 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2859} 4406}
2860 4407
2861void noinline 4408ecb_noinline
4409void
2862ev_timer_stop (EV_P_ ev_timer *w) 4410ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2863{ 4411{
2864 clear_pending (EV_A_ (W)w); 4412 clear_pending (EV_A_ (W)w);
2865 if (expect_false (!ev_is_active (w))) 4413 if (ecb_expect_false (!ev_is_active (w)))
2866 return; 4414 return;
2867 4415
2868 EV_FREQUENT_CHECK; 4416 EV_FREQUENT_CHECK;
2869 4417
2870 { 4418 {
… …
2872 4420
2873 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4421 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2874 4422
2875 --timercnt; 4423 --timercnt;
2876 4424
2877 if (expect_true (active < timercnt + HEAP0)) 4425 if (ecb_expect_true (active < timercnt + HEAP0))
2878 { 4426 {
2879 timers [active] = timers [timercnt + HEAP0]; 4427 timers [active] = timers [timercnt + HEAP0];
2880 adjustheap (timers, timercnt, active); 4428 adjustheap (timers, timercnt, active);
2881 } 4429 }
2882 } 4430 }
… …
2886 ev_stop (EV_A_ (W)w); 4434 ev_stop (EV_A_ (W)w);
2887 4435
2888 EV_FREQUENT_CHECK; 4436 EV_FREQUENT_CHECK;
2889} 4437}
2890 4438
2891void noinline 4439ecb_noinline
4440void
2892ev_timer_again (EV_P_ ev_timer *w) 4441ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2893{ 4442{
2894 EV_FREQUENT_CHECK; 4443 EV_FREQUENT_CHECK;
4444
4445 clear_pending (EV_A_ (W)w);
2895 4446
2896 if (ev_is_active (w)) 4447 if (ev_is_active (w))
2897 { 4448 {
2898 if (w->repeat) 4449 if (w->repeat)
2899 { 4450 {
… …
2912 4463
2913 EV_FREQUENT_CHECK; 4464 EV_FREQUENT_CHECK;
2914} 4465}
2915 4466
2916ev_tstamp 4467ev_tstamp
2917ev_timer_remaining (EV_P_ ev_timer *w) 4468ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2918{ 4469{
2919 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4470 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
2920} 4471}
2921 4472
2922#if EV_PERIODIC_ENABLE 4473#if EV_PERIODIC_ENABLE
2923void noinline 4474ecb_noinline
4475void
2924ev_periodic_start (EV_P_ ev_periodic *w) 4476ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2925{ 4477{
2926 if (expect_false (ev_is_active (w))) 4478 if (ecb_expect_false (ev_is_active (w)))
2927 return; 4479 return;
4480
4481#if EV_USE_TIMERFD
4482 if (timerfd == -2)
4483 evtimerfd_init (EV_A);
4484#endif
2928 4485
2929 if (w->reschedule_cb) 4486 if (w->reschedule_cb)
2930 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4487 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2931 else if (w->interval) 4488 else if (w->interval)
2932 { 4489 {
… …
2938 4495
2939 EV_FREQUENT_CHECK; 4496 EV_FREQUENT_CHECK;
2940 4497
2941 ++periodiccnt; 4498 ++periodiccnt;
2942 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4499 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2943 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4500 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2944 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4501 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2945 ANHE_at_cache (periodics [ev_active (w)]); 4502 ANHE_at_cache (periodics [ev_active (w)]);
2946 upheap (periodics, ev_active (w)); 4503 upheap (periodics, ev_active (w));
2947 4504
2948 EV_FREQUENT_CHECK; 4505 EV_FREQUENT_CHECK;
2949 4506
2950 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4507 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2951} 4508}
2952 4509
2953void noinline 4510ecb_noinline
4511void
2954ev_periodic_stop (EV_P_ ev_periodic *w) 4512ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2955{ 4513{
2956 clear_pending (EV_A_ (W)w); 4514 clear_pending (EV_A_ (W)w);
2957 if (expect_false (!ev_is_active (w))) 4515 if (ecb_expect_false (!ev_is_active (w)))
2958 return; 4516 return;
2959 4517
2960 EV_FREQUENT_CHECK; 4518 EV_FREQUENT_CHECK;
2961 4519
2962 { 4520 {
… …
2964 4522
2965 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4523 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2966 4524
2967 --periodiccnt; 4525 --periodiccnt;
2968 4526
2969 if (expect_true (active < periodiccnt + HEAP0)) 4527 if (ecb_expect_true (active < periodiccnt + HEAP0))
2970 { 4528 {
2971 periodics [active] = periodics [periodiccnt + HEAP0]; 4529 periodics [active] = periodics [periodiccnt + HEAP0];
2972 adjustheap (periodics, periodiccnt, active); 4530 adjustheap (periodics, periodiccnt, active);
2973 } 4531 }
2974 } 4532 }
… …
2976 ev_stop (EV_A_ (W)w); 4534 ev_stop (EV_A_ (W)w);
2977 4535
2978 EV_FREQUENT_CHECK; 4536 EV_FREQUENT_CHECK;
2979} 4537}
2980 4538
2981void noinline 4539ecb_noinline
4540void
2982ev_periodic_again (EV_P_ ev_periodic *w) 4541ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2983{ 4542{
2984 /* TODO: use adjustheap and recalculation */ 4543 /* TODO: use adjustheap and recalculation */
2985 ev_periodic_stop (EV_A_ w); 4544 ev_periodic_stop (EV_A_ w);
2986 ev_periodic_start (EV_A_ w); 4545 ev_periodic_start (EV_A_ w);
2987} 4546}
… …
2991# define SA_RESTART 0 4550# define SA_RESTART 0
2992#endif 4551#endif
2993 4552
2994#if EV_SIGNAL_ENABLE 4553#if EV_SIGNAL_ENABLE
2995 4554
2996void noinline 4555ecb_noinline
4556void
2997ev_signal_start (EV_P_ ev_signal *w) 4557ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2998{ 4558{
2999 if (expect_false (ev_is_active (w))) 4559 if (ecb_expect_false (ev_is_active (w)))
3000 return; 4560 return;
3001 4561
3002 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4562 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3003 4563
3004#if EV_MULTIPLICITY 4564#if EV_MULTIPLICITY
3005 assert (("libev: a signal must not be attached to two different loops", 4565 assert (("libev: a signal must not be attached to two different loops",
3006 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4566 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3007 4567
3008 signals [w->signum - 1].loop = EV_A; 4568 signals [w->signum - 1].loop = EV_A;
4569 ECB_MEMORY_FENCE_RELEASE;
3009#endif 4570#endif
3010 4571
3011 EV_FREQUENT_CHECK; 4572 EV_FREQUENT_CHECK;
3012 4573
3013#if EV_USE_SIGNALFD 4574#if EV_USE_SIGNALFD
… …
3072 } 4633 }
3073 4634
3074 EV_FREQUENT_CHECK; 4635 EV_FREQUENT_CHECK;
3075} 4636}
3076 4637
3077void noinline 4638ecb_noinline
4639void
3078ev_signal_stop (EV_P_ ev_signal *w) 4640ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
3079{ 4641{
3080 clear_pending (EV_A_ (W)w); 4642 clear_pending (EV_A_ (W)w);
3081 if (expect_false (!ev_is_active (w))) 4643 if (ecb_expect_false (!ev_is_active (w)))
3082 return; 4644 return;
3083 4645
3084 EV_FREQUENT_CHECK; 4646 EV_FREQUENT_CHECK;
3085 4647
3086 wlist_del (&signals [w->signum - 1].head, (WL)w); 4648 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
3114#endif 4676#endif
3115 4677
3116#if EV_CHILD_ENABLE 4678#if EV_CHILD_ENABLE
3117 4679
3118void 4680void
3119ev_child_start (EV_P_ ev_child *w) 4681ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
3120{ 4682{
3121#if EV_MULTIPLICITY 4683#if EV_MULTIPLICITY
3122 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4684 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3123#endif 4685#endif
3124 if (expect_false (ev_is_active (w))) 4686 if (ecb_expect_false (ev_is_active (w)))
3125 return; 4687 return;
3126 4688
3127 EV_FREQUENT_CHECK; 4689 EV_FREQUENT_CHECK;
3128 4690
3129 ev_start (EV_A_ (W)w, 1); 4691 ev_start (EV_A_ (W)w, 1);
… …
3131 4693
3132 EV_FREQUENT_CHECK; 4694 EV_FREQUENT_CHECK;
3133} 4695}
3134 4696
3135void 4697void
3136ev_child_stop (EV_P_ ev_child *w) 4698ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
3137{ 4699{
3138 clear_pending (EV_A_ (W)w); 4700 clear_pending (EV_A_ (W)w);
3139 if (expect_false (!ev_is_active (w))) 4701 if (ecb_expect_false (!ev_is_active (w)))
3140 return; 4702 return;
3141 4703
3142 EV_FREQUENT_CHECK; 4704 EV_FREQUENT_CHECK;
3143 4705
3144 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); 4706 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
… …
3158 4720
3159#define DEF_STAT_INTERVAL 5.0074891 4721#define DEF_STAT_INTERVAL 5.0074891
3160#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4722#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3161#define MIN_STAT_INTERVAL 0.1074891 4723#define MIN_STAT_INTERVAL 0.1074891
3162 4724
3163static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4725ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3164 4726
3165#if EV_USE_INOTIFY 4727#if EV_USE_INOTIFY
3166 4728
3167/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4729/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3168# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4730# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3169 4731
3170static void noinline 4732ecb_noinline
4733static void
3171infy_add (EV_P_ ev_stat *w) 4734infy_add (EV_P_ ev_stat *w)
3172{ 4735{
3173 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); 4736 w->wd = inotify_add_watch (fs_fd, w->path,
4737 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4738 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4739 | IN_DONT_FOLLOW | IN_MASK_ADD);
3174 4740
3175 if (w->wd >= 0) 4741 if (w->wd >= 0)
3176 { 4742 {
3177 struct statfs sfs; 4743 struct statfs sfs;
3178 4744
… …
3182 4748
3183 if (!fs_2625) 4749 if (!fs_2625)
3184 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4750 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3185 else if (!statfs (w->path, &sfs) 4751 else if (!statfs (w->path, &sfs)
3186 && (sfs.f_type == 0x1373 /* devfs */ 4752 && (sfs.f_type == 0x1373 /* devfs */
4753 || sfs.f_type == 0x4006 /* fat */
4754 || sfs.f_type == 0x4d44 /* msdos */
3187 || sfs.f_type == 0xEF53 /* ext2/3 */ 4755 || sfs.f_type == 0xEF53 /* ext2/3 */
4756 || sfs.f_type == 0x72b6 /* jffs2 */
4757 || sfs.f_type == 0x858458f6 /* ramfs */
4758 || sfs.f_type == 0x5346544e /* ntfs */
3188 || sfs.f_type == 0x3153464a /* jfs */ 4759 || sfs.f_type == 0x3153464a /* jfs */
4760 || sfs.f_type == 0x9123683e /* btrfs */
3189 || sfs.f_type == 0x52654973 /* reiser3 */ 4761 || sfs.f_type == 0x52654973 /* reiser3 */
3190 || sfs.f_type == 0x01021994 /* tempfs */ 4762 || sfs.f_type == 0x01021994 /* tmpfs */
3191 || sfs.f_type == 0x58465342 /* xfs */)) 4763 || sfs.f_type == 0x58465342 /* xfs */))
3192 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4764 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3193 else 4765 else
3194 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4766 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3195 } 4767 }
… …
3230 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4802 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3231 ev_timer_again (EV_A_ &w->timer); 4803 ev_timer_again (EV_A_ &w->timer);
3232 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4804 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3233} 4805}
3234 4806
3235static void noinline 4807ecb_noinline
4808static void
3236infy_del (EV_P_ ev_stat *w) 4809infy_del (EV_P_ ev_stat *w)
3237{ 4810{
3238 int slot; 4811 int slot;
3239 int wd = w->wd; 4812 int wd = w->wd;
3240 4813
… …
3247 4820
3248 /* remove this watcher, if others are watching it, they will rearm */ 4821 /* remove this watcher, if others are watching it, they will rearm */
3249 inotify_rm_watch (fs_fd, wd); 4822 inotify_rm_watch (fs_fd, wd);
3250} 4823}
3251 4824
3252static void noinline 4825ecb_noinline
4826static void
3253infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4827infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3254{ 4828{
3255 if (slot < 0) 4829 if (slot < 0)
3256 /* overflow, need to check for all hash slots */ 4830 /* overflow, need to check for all hash slots */
3257 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4831 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3293 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4867 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3294 ofs += sizeof (struct inotify_event) + ev->len; 4868 ofs += sizeof (struct inotify_event) + ev->len;
3295 } 4869 }
3296} 4870}
3297 4871
3298inline_size void ecb_cold 4872inline_size ecb_cold
4873void
3299ev_check_2625 (EV_P) 4874ev_check_2625 (EV_P)
3300{ 4875{
3301 /* kernels < 2.6.25 are borked 4876 /* kernels < 2.6.25 are borked
3302 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4877 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3303 */ 4878 */
… …
3308} 4883}
3309 4884
3310inline_size int 4885inline_size int
3311infy_newfd (void) 4886infy_newfd (void)
3312{ 4887{
3313#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4888#if defined IN_CLOEXEC && defined IN_NONBLOCK
3314 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4889 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3315 if (fd >= 0) 4890 if (fd >= 0)
3316 return fd; 4891 return fd;
3317#endif 4892#endif
3318 return inotify_init (); 4893 return inotify_init ();
… …
3393#else 4968#else
3394# define EV_LSTAT(p,b) lstat (p, b) 4969# define EV_LSTAT(p,b) lstat (p, b)
3395#endif 4970#endif
3396 4971
3397void 4972void
3398ev_stat_stat (EV_P_ ev_stat *w) 4973ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3399{ 4974{
3400 if (lstat (w->path, &w->attr) < 0) 4975 if (lstat (w->path, &w->attr) < 0)
3401 w->attr.st_nlink = 0; 4976 w->attr.st_nlink = 0;
3402 else if (!w->attr.st_nlink) 4977 else if (!w->attr.st_nlink)
3403 w->attr.st_nlink = 1; 4978 w->attr.st_nlink = 1;
3404} 4979}
3405 4980
3406static void noinline 4981ecb_noinline
4982static void
3407stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4983stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3408{ 4984{
3409 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4985 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3410 4986
3411 ev_statdata prev = w->attr; 4987 ev_statdata prev = w->attr;
… …
3442 ev_feed_event (EV_A_ w, EV_STAT); 5018 ev_feed_event (EV_A_ w, EV_STAT);
3443 } 5019 }
3444} 5020}
3445 5021
3446void 5022void
3447ev_stat_start (EV_P_ ev_stat *w) 5023ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3448{ 5024{
3449 if (expect_false (ev_is_active (w))) 5025 if (ecb_expect_false (ev_is_active (w)))
3450 return; 5026 return;
3451 5027
3452 ev_stat_stat (EV_A_ w); 5028 ev_stat_stat (EV_A_ w);
3453 5029
3454 if (w->interval < MIN_STAT_INTERVAL && w->interval) 5030 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3473 5049
3474 EV_FREQUENT_CHECK; 5050 EV_FREQUENT_CHECK;
3475} 5051}
3476 5052
3477void 5053void
3478ev_stat_stop (EV_P_ ev_stat *w) 5054ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3479{ 5055{
3480 clear_pending (EV_A_ (W)w); 5056 clear_pending (EV_A_ (W)w);
3481 if (expect_false (!ev_is_active (w))) 5057 if (ecb_expect_false (!ev_is_active (w)))
3482 return; 5058 return;
3483 5059
3484 EV_FREQUENT_CHECK; 5060 EV_FREQUENT_CHECK;
3485 5061
3486#if EV_USE_INOTIFY 5062#if EV_USE_INOTIFY
… …
3499} 5075}
3500#endif 5076#endif
3501 5077
3502#if EV_IDLE_ENABLE 5078#if EV_IDLE_ENABLE
3503void 5079void
3504ev_idle_start (EV_P_ ev_idle *w) 5080ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3505{ 5081{
3506 if (expect_false (ev_is_active (w))) 5082 if (ecb_expect_false (ev_is_active (w)))
3507 return; 5083 return;
3508 5084
3509 pri_adjust (EV_A_ (W)w); 5085 pri_adjust (EV_A_ (W)w);
3510 5086
3511 EV_FREQUENT_CHECK; 5087 EV_FREQUENT_CHECK;
… …
3514 int active = ++idlecnt [ABSPRI (w)]; 5090 int active = ++idlecnt [ABSPRI (w)];
3515 5091
3516 ++idleall; 5092 ++idleall;
3517 ev_start (EV_A_ (W)w, active); 5093 ev_start (EV_A_ (W)w, active);
3518 5094
3519 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 5095 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3520 idles [ABSPRI (w)][active - 1] = w; 5096 idles [ABSPRI (w)][active - 1] = w;
3521 } 5097 }
3522 5098
3523 EV_FREQUENT_CHECK; 5099 EV_FREQUENT_CHECK;
3524} 5100}
3525 5101
3526void 5102void
3527ev_idle_stop (EV_P_ ev_idle *w) 5103ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3528{ 5104{
3529 clear_pending (EV_A_ (W)w); 5105 clear_pending (EV_A_ (W)w);
3530 if (expect_false (!ev_is_active (w))) 5106 if (ecb_expect_false (!ev_is_active (w)))
3531 return; 5107 return;
3532 5108
3533 EV_FREQUENT_CHECK; 5109 EV_FREQUENT_CHECK;
3534 5110
3535 { 5111 {
… …
3546} 5122}
3547#endif 5123#endif
3548 5124
3549#if EV_PREPARE_ENABLE 5125#if EV_PREPARE_ENABLE
3550void 5126void
3551ev_prepare_start (EV_P_ ev_prepare *w) 5127ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3552{ 5128{
3553 if (expect_false (ev_is_active (w))) 5129 if (ecb_expect_false (ev_is_active (w)))
3554 return; 5130 return;
3555 5131
3556 EV_FREQUENT_CHECK; 5132 EV_FREQUENT_CHECK;
3557 5133
3558 ev_start (EV_A_ (W)w, ++preparecnt); 5134 ev_start (EV_A_ (W)w, ++preparecnt);
3559 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 5135 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3560 prepares [preparecnt - 1] = w; 5136 prepares [preparecnt - 1] = w;
3561 5137
3562 EV_FREQUENT_CHECK; 5138 EV_FREQUENT_CHECK;
3563} 5139}
3564 5140
3565void 5141void
3566ev_prepare_stop (EV_P_ ev_prepare *w) 5142ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3567{ 5143{
3568 clear_pending (EV_A_ (W)w); 5144 clear_pending (EV_A_ (W)w);
3569 if (expect_false (!ev_is_active (w))) 5145 if (ecb_expect_false (!ev_is_active (w)))
3570 return; 5146 return;
3571 5147
3572 EV_FREQUENT_CHECK; 5148 EV_FREQUENT_CHECK;
3573 5149
3574 { 5150 {
… …
3584} 5160}
3585#endif 5161#endif
3586 5162
3587#if EV_CHECK_ENABLE 5163#if EV_CHECK_ENABLE
3588void 5164void
3589ev_check_start (EV_P_ ev_check *w) 5165ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3590{ 5166{
3591 if (expect_false (ev_is_active (w))) 5167 if (ecb_expect_false (ev_is_active (w)))
3592 return; 5168 return;
3593 5169
3594 EV_FREQUENT_CHECK; 5170 EV_FREQUENT_CHECK;
3595 5171
3596 ev_start (EV_A_ (W)w, ++checkcnt); 5172 ev_start (EV_A_ (W)w, ++checkcnt);
3597 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5173 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3598 checks [checkcnt - 1] = w; 5174 checks [checkcnt - 1] = w;
3599 5175
3600 EV_FREQUENT_CHECK; 5176 EV_FREQUENT_CHECK;
3601} 5177}
3602 5178
3603void 5179void
3604ev_check_stop (EV_P_ ev_check *w) 5180ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3605{ 5181{
3606 clear_pending (EV_A_ (W)w); 5182 clear_pending (EV_A_ (W)w);
3607 if (expect_false (!ev_is_active (w))) 5183 if (ecb_expect_false (!ev_is_active (w)))
3608 return; 5184 return;
3609 5185
3610 EV_FREQUENT_CHECK; 5186 EV_FREQUENT_CHECK;
3611 5187
3612 { 5188 {
… …
3621 EV_FREQUENT_CHECK; 5197 EV_FREQUENT_CHECK;
3622} 5198}
3623#endif 5199#endif
3624 5200
3625#if EV_EMBED_ENABLE 5201#if EV_EMBED_ENABLE
3626void noinline 5202ecb_noinline
5203void
3627ev_embed_sweep (EV_P_ ev_embed *w) 5204ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3628{ 5205{
3629 ev_run (w->other, EVRUN_NOWAIT); 5206 ev_run (w->other, EVRUN_NOWAIT);
3630} 5207}
3631 5208
3632static void 5209static void
… …
3654 ev_run (EV_A_ EVRUN_NOWAIT); 5231 ev_run (EV_A_ EVRUN_NOWAIT);
3655 } 5232 }
3656 } 5233 }
3657} 5234}
3658 5235
5236#if EV_FORK_ENABLE
3659static void 5237static void
3660embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5238embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3661{ 5239{
3662 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 5240 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3663 5241
… …
3670 ev_run (EV_A_ EVRUN_NOWAIT); 5248 ev_run (EV_A_ EVRUN_NOWAIT);
3671 } 5249 }
3672 5250
3673 ev_embed_start (EV_A_ w); 5251 ev_embed_start (EV_A_ w);
3674} 5252}
5253#endif
3675 5254
3676#if 0 5255#if 0
3677static void 5256static void
3678embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5257embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3679{ 5258{
3680 ev_idle_stop (EV_A_ idle); 5259 ev_idle_stop (EV_A_ idle);
3681} 5260}
3682#endif 5261#endif
3683 5262
3684void 5263void
3685ev_embed_start (EV_P_ ev_embed *w) 5264ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3686{ 5265{
3687 if (expect_false (ev_is_active (w))) 5266 if (ecb_expect_false (ev_is_active (w)))
3688 return; 5267 return;
3689 5268
3690 { 5269 {
3691 EV_P = w->other; 5270 EV_P = w->other;
3692 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 5271 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
… …
3700 5279
3701 ev_prepare_init (&w->prepare, embed_prepare_cb); 5280 ev_prepare_init (&w->prepare, embed_prepare_cb);
3702 ev_set_priority (&w->prepare, EV_MINPRI); 5281 ev_set_priority (&w->prepare, EV_MINPRI);
3703 ev_prepare_start (EV_A_ &w->prepare); 5282 ev_prepare_start (EV_A_ &w->prepare);
3704 5283
5284#if EV_FORK_ENABLE
3705 ev_fork_init (&w->fork, embed_fork_cb); 5285 ev_fork_init (&w->fork, embed_fork_cb);
3706 ev_fork_start (EV_A_ &w->fork); 5286 ev_fork_start (EV_A_ &w->fork);
5287#endif
3707 5288
3708 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5289 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3709 5290
3710 ev_start (EV_A_ (W)w, 1); 5291 ev_start (EV_A_ (W)w, 1);
3711 5292
3712 EV_FREQUENT_CHECK; 5293 EV_FREQUENT_CHECK;
3713} 5294}
3714 5295
3715void 5296void
3716ev_embed_stop (EV_P_ ev_embed *w) 5297ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3717{ 5298{
3718 clear_pending (EV_A_ (W)w); 5299 clear_pending (EV_A_ (W)w);
3719 if (expect_false (!ev_is_active (w))) 5300 if (ecb_expect_false (!ev_is_active (w)))
3720 return; 5301 return;
3721 5302
3722 EV_FREQUENT_CHECK; 5303 EV_FREQUENT_CHECK;
3723 5304
3724 ev_io_stop (EV_A_ &w->io); 5305 ev_io_stop (EV_A_ &w->io);
3725 ev_prepare_stop (EV_A_ &w->prepare); 5306 ev_prepare_stop (EV_A_ &w->prepare);
5307#if EV_FORK_ENABLE
3726 ev_fork_stop (EV_A_ &w->fork); 5308 ev_fork_stop (EV_A_ &w->fork);
5309#endif
3727 5310
3728 ev_stop (EV_A_ (W)w); 5311 ev_stop (EV_A_ (W)w);
3729 5312
3730 EV_FREQUENT_CHECK; 5313 EV_FREQUENT_CHECK;
3731} 5314}
3732#endif 5315#endif
3733 5316
3734#if EV_FORK_ENABLE 5317#if EV_FORK_ENABLE
3735void 5318void
3736ev_fork_start (EV_P_ ev_fork *w) 5319ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3737{ 5320{
3738 if (expect_false (ev_is_active (w))) 5321 if (ecb_expect_false (ev_is_active (w)))
3739 return; 5322 return;
3740 5323
3741 EV_FREQUENT_CHECK; 5324 EV_FREQUENT_CHECK;
3742 5325
3743 ev_start (EV_A_ (W)w, ++forkcnt); 5326 ev_start (EV_A_ (W)w, ++forkcnt);
3744 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5327 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3745 forks [forkcnt - 1] = w; 5328 forks [forkcnt - 1] = w;
3746 5329
3747 EV_FREQUENT_CHECK; 5330 EV_FREQUENT_CHECK;
3748} 5331}
3749 5332
3750void 5333void
3751ev_fork_stop (EV_P_ ev_fork *w) 5334ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3752{ 5335{
3753 clear_pending (EV_A_ (W)w); 5336 clear_pending (EV_A_ (W)w);
3754 if (expect_false (!ev_is_active (w))) 5337 if (ecb_expect_false (!ev_is_active (w)))
3755 return; 5338 return;
3756 5339
3757 EV_FREQUENT_CHECK; 5340 EV_FREQUENT_CHECK;
3758 5341
3759 { 5342 {
… …
3769} 5352}
3770#endif 5353#endif
3771 5354
3772#if EV_CLEANUP_ENABLE 5355#if EV_CLEANUP_ENABLE
3773void 5356void
3774ev_cleanup_start (EV_P_ ev_cleanup *w) 5357ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3775{ 5358{
3776 if (expect_false (ev_is_active (w))) 5359 if (ecb_expect_false (ev_is_active (w)))
3777 return; 5360 return;
3778 5361
3779 EV_FREQUENT_CHECK; 5362 EV_FREQUENT_CHECK;
3780 5363
3781 ev_start (EV_A_ (W)w, ++cleanupcnt); 5364 ev_start (EV_A_ (W)w, ++cleanupcnt);
3782 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); 5365 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3783 cleanups [cleanupcnt - 1] = w; 5366 cleanups [cleanupcnt - 1] = w;
3784 5367
3785 /* cleanup watchers should never keep a refcount on the loop */ 5368 /* cleanup watchers should never keep a refcount on the loop */
3786 ev_unref (EV_A); 5369 ev_unref (EV_A);
3787 EV_FREQUENT_CHECK; 5370 EV_FREQUENT_CHECK;
3788} 5371}
3789 5372
3790void 5373void
3791ev_cleanup_stop (EV_P_ ev_cleanup *w) 5374ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3792{ 5375{
3793 clear_pending (EV_A_ (W)w); 5376 clear_pending (EV_A_ (W)w);
3794 if (expect_false (!ev_is_active (w))) 5377 if (ecb_expect_false (!ev_is_active (w)))
3795 return; 5378 return;
3796 5379
3797 EV_FREQUENT_CHECK; 5380 EV_FREQUENT_CHECK;
3798 ev_ref (EV_A); 5381 ev_ref (EV_A);
3799 5382
… …
3810} 5393}
3811#endif 5394#endif
3812 5395
3813#if EV_ASYNC_ENABLE 5396#if EV_ASYNC_ENABLE
3814void 5397void
3815ev_async_start (EV_P_ ev_async *w) 5398ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3816{ 5399{
3817 if (expect_false (ev_is_active (w))) 5400 if (ecb_expect_false (ev_is_active (w)))
3818 return; 5401 return;
3819 5402
3820 w->sent = 0; 5403 w->sent = 0;
3821 5404
3822 evpipe_init (EV_A); 5405 evpipe_init (EV_A);
3823 5406
3824 EV_FREQUENT_CHECK; 5407 EV_FREQUENT_CHECK;
3825 5408
3826 ev_start (EV_A_ (W)w, ++asynccnt); 5409 ev_start (EV_A_ (W)w, ++asynccnt);
3827 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5410 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3828 asyncs [asynccnt - 1] = w; 5411 asyncs [asynccnt - 1] = w;
3829 5412
3830 EV_FREQUENT_CHECK; 5413 EV_FREQUENT_CHECK;
3831} 5414}
3832 5415
3833void 5416void
3834ev_async_stop (EV_P_ ev_async *w) 5417ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3835{ 5418{
3836 clear_pending (EV_A_ (W)w); 5419 clear_pending (EV_A_ (W)w);
3837 if (expect_false (!ev_is_active (w))) 5420 if (ecb_expect_false (!ev_is_active (w)))
3838 return; 5421 return;
3839 5422
3840 EV_FREQUENT_CHECK; 5423 EV_FREQUENT_CHECK;
3841 5424
3842 { 5425 {
… …
3850 5433
3851 EV_FREQUENT_CHECK; 5434 EV_FREQUENT_CHECK;
3852} 5435}
3853 5436
3854void 5437void
3855ev_async_send (EV_P_ ev_async *w) 5438ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3856{ 5439{
3857 w->sent = 1; 5440 w->sent = 1;
3858 evpipe_write (EV_A_ &async_pending); 5441 evpipe_write (EV_A_ &async_pending);
3859} 5442}
3860#endif 5443#endif
… …
3897 5480
3898 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5481 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3899} 5482}
3900 5483
3901void 5484void
3902ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5485ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3903{ 5486{
3904 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5487 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3905
3906 if (expect_false (!once))
3907 {
3908 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3909 return;
3910 }
3911 5488
3912 once->cb = cb; 5489 once->cb = cb;
3913 once->arg = arg; 5490 once->arg = arg;
3914 5491
3915 ev_init (&once->io, once_cb_io); 5492 ev_init (&once->io, once_cb_io);
… …
3928} 5505}
3929 5506
3930/*****************************************************************************/ 5507/*****************************************************************************/
3931 5508
3932#if EV_WALK_ENABLE 5509#if EV_WALK_ENABLE
3933void ecb_cold 5510ecb_cold
5511void
3934ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5512ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3935{ 5513{
3936 int i, j; 5514 int i, j;
3937 ev_watcher_list *wl, *wn; 5515 ev_watcher_list *wl, *wn;
3938 5516
3939 if (types & (EV_IO | EV_EMBED)) 5517 if (types & (EV_IO | EV_EMBED))
… …
3982 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5560 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3983#endif 5561#endif
3984 5562
3985#if EV_IDLE_ENABLE 5563#if EV_IDLE_ENABLE
3986 if (types & EV_IDLE) 5564 if (types & EV_IDLE)
3987 for (j = NUMPRI; i--; ) 5565 for (j = NUMPRI; j--; )
3988 for (i = idlecnt [j]; i--; ) 5566 for (i = idlecnt [j]; i--; )
3989 cb (EV_A_ EV_IDLE, idles [j][i]); 5567 cb (EV_A_ EV_IDLE, idles [j][i]);
3990#endif 5568#endif
3991 5569
3992#if EV_FORK_ENABLE 5570#if EV_FORK_ENABLE
… …
4045 5623
4046#if EV_MULTIPLICITY 5624#if EV_MULTIPLICITY
4047 #include "ev_wrap.h" 5625 #include "ev_wrap.h"
4048#endif 5626#endif
4049 5627
4050EV_CPP(})
4051

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