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Comparing libev/ev.c (file contents):
Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC vs.
Revision 1.526 by root, Wed Jan 22 17:11:33 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
604/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
605/* ECB.H BEGIN */
606/*
607 * libecb - http://software.schmorp.de/pkg/libecb
608 *
609 * Copyright (©) 2009-2015,2018-2020 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;
469#if __GNUC__ >= 4 667 #if __GNUC__
470# define expect(expr,value) __builtin_expect ((expr),(value)) 668 typedef signed long long int64_t;
471# define noinline __attribute__ ((noinline)) 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
472#else 685#else
473# define expect(expr,value) (expr) 686 #include <inttypes.h>
474# define noinline 687 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
475# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 688 #define ECB_PTRSIZE 8
476# define inline 689 #else
690 #define ECB_PTRSIZE 4
691 #endif
477# 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
478#endif 702 #endif
703#endif
479 704
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
713
714/* many compilers define _GNUC_ to some versions but then only implement
715 * what their idiot authors think are the "more important" extensions,
716 * causing enormous grief in return for some better fake benchmark numbers.
717 * or so.
718 * we try to detect these and simply assume they are not gcc - if they have
719 * an issue with that they should have done it right in the first place.
720 */
721#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
722 #define ECB_GCC_VERSION(major,minor) 0
723#else
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
843 #endif
844#endif
845
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
932 #define ecb_inline static inline
933#elif ECB_GCC_VERSION(2,5)
934 #define ecb_inline static __inline__
935#elif ECB_C99
936 #define ecb_inline static inline
937#else
938 #define ecb_inline static
939#endif
940
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)
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)
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)
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)
982 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
983#else
984 #define ecb_prefetch(addr,rw,locality)
985#endif
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
1013 #define ecb_noinline ecb_attribute ((__noinline__))
1014#endif
1015
1016#define ecb_unused ecb_attribute ((__unused__))
1017#define ecb_const ecb_attribute ((__const__))
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
1031
1032#if ECB_GCC_VERSION(4,3)
1033 #define ecb_artificial ecb_attribute ((__artificial__))
1034 #define ecb_hot ecb_attribute ((__hot__))
1035 #define ecb_cold ecb_attribute ((__cold__))
1036#else
1037 #define ecb_artificial
1038 #define ecb_hot
1039 #define ecb_cold
1040#endif
1041
1042/* put around conditional expressions if you are very sure that the */
1043/* expression is mostly true or mostly false. note that these return */
1044/* booleans, not the expression. */
480#define expect_false(expr) expect ((expr) != 0, 0) 1045#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
481#define expect_true(expr) expect ((expr) != 0, 1) 1046#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
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)
1050
1051/* count trailing zero bits and count # of one bits */
1052#if ECB_GCC_VERSION(3,4) \
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
1769
482#define inline_size static inline 1770#define inline_size ecb_inline
483 1771
484#if EV_FEATURE_CODE 1772#if EV_FEATURE_CODE
485# define inline_speed static inline 1773# define inline_speed ecb_inline
486#else 1774#else
487# define inline_speed static noinline 1775# define inline_speed ecb_noinline static
488#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/*****************************************************************************/
489 1843
490#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1844#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
491 1845
492#if EV_MINPRI == EV_MAXPRI 1846#if EV_MINPRI == EV_MAXPRI
493# define ABSPRI(w) (((W)w), 0) 1847# define ABSPRI(w) (((W)w), 0)
494#else 1848#else
495# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1849# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
496#endif 1850#endif
497 1851
498#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1852#define EMPTY /* required for microsofts broken pseudo-c compiler */
499#define EMPTY2(a,b) /* used to suppress some warnings */
500 1853
501typedef ev_watcher *W; 1854typedef ev_watcher *W;
502typedef ev_watcher_list *WL; 1855typedef ev_watcher_list *WL;
503typedef ev_watcher_time *WT; 1856typedef ev_watcher_time *WT;
504 1857
… …
529# include "ev_win32.c" 1882# include "ev_win32.c"
530#endif 1883#endif
531 1884
532/*****************************************************************************/ 1885/*****************************************************************************/
533 1886
1887#if EV_USE_LINUXAIO
1888# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1889#endif
1890
534/* define a suitable floor function (only used by periodics atm) */ 1891/* define a suitable floor function (only used by periodics atm) */
535 1892
536#if EV_USE_FLOOR 1893#if EV_USE_FLOOR
537# include <math.h> 1894# include <math.h>
538# define ev_floor(v) floor (v) 1895# define ev_floor(v) floor (v)
539#else 1896#else
540 1897
541#include <float.h> 1898#include <float.h>
542 1899
543/* 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
544static ev_tstamp noinline 1902static ev_tstamp
545ev_floor (ev_tstamp v) 1903ev_floor (ev_tstamp v)
546{ 1904{
547 /* the choice of shift factor is not terribly important */ 1905 /* the choice of shift factor is not terribly important */
548#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ 1906#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
549 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; 1907 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
550#else 1908#else
551 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; 1909 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
552#endif 1910#endif
553 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
554 /* argument too large for an unsigned long? */ 1920 /* argument too large for an unsigned long? then reduce it */
555 if (expect_false (v >= shift)) 1921 if (ecb_expect_false (v >= shift))
556 { 1922 {
557 ev_tstamp f; 1923 ev_tstamp f;
558 1924
559 if (v == v - 1.) 1925 if (v == v - 1.)
560 return v; /* very large number */ 1926 return v; /* very large numbers are assumed to be integer */
561 1927
562 f = shift * ev_floor (v * (1. / shift)); 1928 f = shift * ev_floor (v * (1. / shift));
563 return f + ev_floor (v - f); 1929 return f + ev_floor (v - f);
564 } 1930 }
565 1931
566 /* special treatment for negative args? */
567 if (expect_false (v < 0.))
568 {
569 ev_tstamp f = -ev_floor (-v);
570
571 return f - (f == v ? 0 : 1);
572 }
573
574 /* fits into an unsigned long */ 1932 /* fits into an unsigned long */
575 return (unsigned long)v; 1933 return (unsigned long)v;
576} 1934}
577 1935
578#endif 1936#endif
… …
581 1939
582#ifdef __linux 1940#ifdef __linux
583# include <sys/utsname.h> 1941# include <sys/utsname.h>
584#endif 1942#endif
585 1943
1944ecb_noinline ecb_cold
586static unsigned int noinline 1945static unsigned int
587ev_linux_version (void) 1946ev_linux_version (void)
588{ 1947{
589#ifdef __linux 1948#ifdef __linux
590 unsigned int v = 0; 1949 unsigned int v = 0;
591 struct utsname buf; 1950 struct utsname buf;
… …
620} 1979}
621 1980
622/*****************************************************************************/ 1981/*****************************************************************************/
623 1982
624#if EV_AVOID_STDIO 1983#if EV_AVOID_STDIO
625static void noinline 1984ecb_noinline ecb_cold
1985static void
626ev_printerr (const char *msg) 1986ev_printerr (const char *msg)
627{ 1987{
628 write (STDERR_FILENO, msg, strlen (msg)); 1988 write (STDERR_FILENO, msg, strlen (msg));
629} 1989}
630#endif 1990#endif
631 1991
632static void (*syserr_cb)(const char *msg); 1992static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
633 1993
1994ecb_cold
634void 1995void
635ev_set_syserr_cb (void (*cb)(const char *msg)) 1996ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
636{ 1997{
637 syserr_cb = cb; 1998 syserr_cb = cb;
638} 1999}
639 2000
640static void noinline 2001ecb_noinline ecb_cold
2002static void
641ev_syserr (const char *msg) 2003ev_syserr (const char *msg)
642{ 2004{
643 if (!msg) 2005 if (!msg)
644 msg = "(libev) system error"; 2006 msg = "(libev) system error";
645 2007
… …
658 abort (); 2020 abort ();
659 } 2021 }
660} 2022}
661 2023
662static void * 2024static void *
663ev_realloc_emul (void *ptr, long size) 2025ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
664{ 2026{
665#if __GLIBC__
666 return realloc (ptr, size);
667#else
668 /* some systems, notably openbsd and darwin, fail to properly 2027 /* some systems, notably openbsd and darwin, fail to properly
669 * 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
670 * 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.
671 */ 2032 */
672 2033
673 if (size) 2034 if (size)
674 return realloc (ptr, size); 2035 return realloc (ptr, size);
675 2036
676 free (ptr); 2037 free (ptr);
677 return 0; 2038 return 0;
678#endif
679} 2039}
680 2040
681static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 2041static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
682 2042
2043ecb_cold
683void 2044void
684ev_set_allocator (void *(*cb)(void *ptr, long size)) 2045ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
685{ 2046{
686 alloc = cb; 2047 alloc = cb;
687} 2048}
688 2049
689inline_speed void * 2050inline_speed void *
… …
716typedef struct 2077typedef struct
717{ 2078{
718 WL head; 2079 WL head;
719 unsigned char events; /* the events watched for */ 2080 unsigned char events; /* the events watched for */
720 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) */
721 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 */
722 unsigned char unused; 2083 unsigned char eflags; /* flags field for use by backends */
723#if EV_USE_EPOLL 2084#if EV_USE_EPOLL
724 unsigned int egen; /* generation counter to counter epoll bugs */ 2085 unsigned int egen; /* generation counter to counter epoll bugs */
725#endif 2086#endif
726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2087#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
727 SOCKET handle; 2088 SOCKET handle;
… …
777 #undef VAR 2138 #undef VAR
778 }; 2139 };
779 #include "ev_wrap.h" 2140 #include "ev_wrap.h"
780 2141
781 static struct ev_loop default_loop_struct; 2142 static struct ev_loop default_loop_struct;
782 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 */
783 2144
784#else 2145#else
785 2146
786 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 */
787 #define VAR(name,decl) static decl; 2148 #define VAR(name,decl) static decl;
788 #include "ev_vars.h" 2149 #include "ev_vars.h"
789 #undef VAR 2150 #undef VAR
790 2151
791 static int ev_default_loop_ptr; 2152 static int ev_default_loop_ptr;
792 2153
793#endif 2154#endif
794 2155
795#if EV_FEATURE_API 2156#if EV_FEATURE_API
796# 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)
797# 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)
798# define EV_INVOKE_PENDING invoke_cb (EV_A) 2159# define EV_INVOKE_PENDING invoke_cb (EV_A)
799#else 2160#else
800# define EV_RELEASE_CB (void)0 2161# define EV_RELEASE_CB (void)0
801# define EV_ACQUIRE_CB (void)0 2162# define EV_ACQUIRE_CB (void)0
802# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2163# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
… …
806 2167
807/*****************************************************************************/ 2168/*****************************************************************************/
808 2169
809#ifndef EV_HAVE_EV_TIME 2170#ifndef EV_HAVE_EV_TIME
810ev_tstamp 2171ev_tstamp
811ev_time (void) 2172ev_time (void) EV_NOEXCEPT
812{ 2173{
813#if EV_USE_REALTIME 2174#if EV_USE_REALTIME
814 if (expect_true (have_realtime)) 2175 if (ecb_expect_true (have_realtime))
815 { 2176 {
816 struct timespec ts; 2177 struct timespec ts;
817 clock_gettime (CLOCK_REALTIME, &ts); 2178 clock_gettime (CLOCK_REALTIME, &ts);
818 return ts.tv_sec + ts.tv_nsec * 1e-9; 2179 return EV_TS_GET (ts);
819 } 2180 }
820#endif 2181#endif
821 2182
2183 {
822 struct timeval tv; 2184 struct timeval tv;
823 gettimeofday (&tv, 0); 2185 gettimeofday (&tv, 0);
824 return tv.tv_sec + tv.tv_usec * 1e-6; 2186 return EV_TV_GET (tv);
2187 }
825} 2188}
826#endif 2189#endif
827 2190
828inline_size ev_tstamp 2191inline_size ev_tstamp
829get_clock (void) 2192get_clock (void)
830{ 2193{
831#if EV_USE_MONOTONIC 2194#if EV_USE_MONOTONIC
832 if (expect_true (have_monotonic)) 2195 if (ecb_expect_true (have_monotonic))
833 { 2196 {
834 struct timespec ts; 2197 struct timespec ts;
835 clock_gettime (CLOCK_MONOTONIC, &ts); 2198 clock_gettime (CLOCK_MONOTONIC, &ts);
836 return ts.tv_sec + ts.tv_nsec * 1e-9; 2199 return EV_TS_GET (ts);
837 } 2200 }
838#endif 2201#endif
839 2202
840 return ev_time (); 2203 return ev_time ();
841} 2204}
842 2205
843#if EV_MULTIPLICITY 2206#if EV_MULTIPLICITY
844ev_tstamp 2207ev_tstamp
845ev_now (EV_P) 2208ev_now (EV_P) EV_NOEXCEPT
846{ 2209{
847 return ev_rt_now; 2210 return ev_rt_now;
848} 2211}
849#endif 2212#endif
850 2213
851void 2214void
852ev_sleep (ev_tstamp delay) 2215ev_sleep (ev_tstamp delay) EV_NOEXCEPT
853{ 2216{
854 if (delay > 0.) 2217 if (delay > EV_TS_CONST (0.))
855 { 2218 {
856#if EV_USE_NANOSLEEP 2219#if EV_USE_NANOSLEEP
857 struct timespec ts; 2220 struct timespec ts;
858 2221
859 EV_TS_SET (ts, delay); 2222 EV_TS_SET (ts, delay);
860 nanosleep (&ts, 0); 2223 nanosleep (&ts, 0);
861#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) */
862 Sleep ((unsigned long)(delay * 1e3)); 2227 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
863#else 2228#else
864 struct timeval tv; 2229 struct timeval tv;
865 2230
866 /* 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 */
867 /* something not guaranteed by newer posix versions, but guaranteed */ 2232 /* something not guaranteed by newer posix versions, but guaranteed */
… …
885 2250
886 do 2251 do
887 ncur <<= 1; 2252 ncur <<= 1;
888 while (cnt > ncur); 2253 while (cnt > ncur);
889 2254
890 /* 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 */
891 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2256 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
892 { 2257 {
893 ncur *= elem; 2258 ncur *= elem;
894 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);
895 ncur = ncur - sizeof (void *) * 4; 2260 ncur = ncur - sizeof (void *) * 4;
… …
897 } 2262 }
898 2263
899 return ncur; 2264 return ncur;
900} 2265}
901 2266
902static noinline void * 2267ecb_noinline ecb_cold
2268static void *
903array_realloc (int elem, void *base, int *cur, int cnt) 2269array_realloc (int elem, void *base, int *cur, int cnt)
904{ 2270{
905 *cur = array_nextsize (elem, *cur, cnt); 2271 *cur = array_nextsize (elem, *cur, cnt);
906 return ev_realloc (base, elem * *cur); 2272 return ev_realloc (base, elem * *cur);
907} 2273}
908 2274
2275#define array_needsize_noinit(base,offset,count)
2276
909#define array_init_zero(base,count) \ 2277#define array_needsize_zerofill(base,offset,count) \
910 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2278 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
911 2279
912#define array_needsize(type,base,cur,cnt,init) \ 2280#define array_needsize(type,base,cur,cnt,init) \
913 if (expect_false ((cnt) > (cur))) \ 2281 if (ecb_expect_false ((cnt) > (cur))) \
914 { \ 2282 { \
915 int ocur_ = (cur); \ 2283 ecb_unused int ocur_ = (cur); \
916 (base) = (type *)array_realloc \ 2284 (base) = (type *)array_realloc \
917 (sizeof (type), (base), &(cur), (cnt)); \ 2285 (sizeof (type), (base), &(cur), (cnt)); \
918 init ((base) + (ocur_), (cur) - ocur_); \ 2286 init ((base), ocur_, ((cur) - ocur_)); \
919 } 2287 }
920 2288
921#if 0 2289#if 0
922#define array_slim(type,stem) \ 2290#define array_slim(type,stem) \
923 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
932 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2300 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
933 2301
934/*****************************************************************************/ 2302/*****************************************************************************/
935 2303
936/* dummy callback for pending events */ 2304/* dummy callback for pending events */
937static void noinline 2305ecb_noinline
2306static void
938pendingcb (EV_P_ ev_prepare *w, int revents) 2307pendingcb (EV_P_ ev_prepare *w, int revents)
939{ 2308{
940} 2309}
941 2310
942void noinline 2311ecb_noinline
2312void
943ev_feed_event (EV_P_ void *w, int revents) 2313ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
944{ 2314{
945 W w_ = (W)w; 2315 W w_ = (W)w;
946 int pri = ABSPRI (w_); 2316 int pri = ABSPRI (w_);
947 2317
948 if (expect_false (w_->pending)) 2318 if (ecb_expect_false (w_->pending))
949 pendings [pri][w_->pending - 1].events |= revents; 2319 pendings [pri][w_->pending - 1].events |= revents;
950 else 2320 else
951 { 2321 {
952 w_->pending = ++pendingcnt [pri]; 2322 w_->pending = ++pendingcnt [pri];
953 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2323 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
954 pendings [pri][w_->pending - 1].w = w_; 2324 pendings [pri][w_->pending - 1].w = w_;
955 pendings [pri][w_->pending - 1].events = revents; 2325 pendings [pri][w_->pending - 1].events = revents;
956 } 2326 }
2327
2328 pendingpri = NUMPRI - 1;
957} 2329}
958 2330
959inline_speed void 2331inline_speed void
960feed_reverse (EV_P_ W w) 2332feed_reverse (EV_P_ W w)
961{ 2333{
962 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2334 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
963 rfeeds [rfeedcnt++] = w; 2335 rfeeds [rfeedcnt++] = w;
964} 2336}
965 2337
966inline_size void 2338inline_size void
967feed_reverse_done (EV_P_ int revents) 2339feed_reverse_done (EV_P_ int revents)
… …
1002inline_speed void 2374inline_speed void
1003fd_event (EV_P_ int fd, int revents) 2375fd_event (EV_P_ int fd, int revents)
1004{ 2376{
1005 ANFD *anfd = anfds + fd; 2377 ANFD *anfd = anfds + fd;
1006 2378
1007 if (expect_true (!anfd->reify)) 2379 if (ecb_expect_true (!anfd->reify))
1008 fd_event_nocheck (EV_A_ fd, revents); 2380 fd_event_nocheck (EV_A_ fd, revents);
1009} 2381}
1010 2382
1011void 2383void
1012ev_feed_fd_event (EV_P_ int fd, int revents) 2384ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
1013{ 2385{
1014 if (fd >= 0 && fd < anfdmax) 2386 if (fd >= 0 && fd < anfdmax)
1015 fd_event_nocheck (EV_A_ fd, revents); 2387 fd_event_nocheck (EV_A_ fd, revents);
1016} 2388}
1017 2389
… …
1020inline_size void 2392inline_size void
1021fd_reify (EV_P) 2393fd_reify (EV_P)
1022{ 2394{
1023 int i; 2395 int i;
1024 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
1025#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2409#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1026 for (i = 0; i < fdchangecnt; ++i) 2410 for (i = 0; i < changecnt; ++i)
1027 { 2411 {
1028 int fd = fdchanges [i]; 2412 int fd = fdchanges [i];
1029 ANFD *anfd = anfds + fd; 2413 ANFD *anfd = anfds + fd;
1030 2414
1031 if (anfd->reify & EV__IOFDSET && anfd->head) 2415 if (anfd->reify & EV__IOFDSET && anfd->head)
… …
1045 } 2429 }
1046 } 2430 }
1047 } 2431 }
1048#endif 2432#endif
1049 2433
1050 for (i = 0; i < fdchangecnt; ++i) 2434 for (i = 0; i < changecnt; ++i)
1051 { 2435 {
1052 int fd = fdchanges [i]; 2436 int fd = fdchanges [i];
1053 ANFD *anfd = anfds + fd; 2437 ANFD *anfd = anfds + fd;
1054 ev_io *w; 2438 ev_io *w;
1055 2439
1056 unsigned char o_events = anfd->events; 2440 unsigned char o_events = anfd->events;
1057 unsigned char o_reify = anfd->reify; 2441 unsigned char o_reify = anfd->reify;
1058 2442
1059 anfd->reify = 0; 2443 anfd->reify = 0;
1060 2444
1061 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2445 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1062 { 2446 {
1063 anfd->events = 0; 2447 anfd->events = 0;
1064 2448
1065 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)
1066 anfd->events |= (unsigned char)w->events; 2450 anfd->events |= (unsigned char)w->events;
… …
1071 2455
1072 if (o_reify & EV__IOFDSET) 2456 if (o_reify & EV__IOFDSET)
1073 backend_modify (EV_A_ fd, o_events, anfd->events); 2457 backend_modify (EV_A_ fd, o_events, anfd->events);
1074 } 2458 }
1075 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
1076 fdchangecnt = 0; 2467 fdchangecnt -= changecnt;
1077} 2468}
1078 2469
1079/* something about the given fd changed */ 2470/* something about the given fd changed */
1080inline_size void 2471inline_size
2472void
1081fd_change (EV_P_ int fd, int flags) 2473fd_change (EV_P_ int fd, int flags)
1082{ 2474{
1083 unsigned char reify = anfds [fd].reify; 2475 unsigned char reify = anfds [fd].reify;
1084 anfds [fd].reify |= flags; 2476 anfds [fd].reify |= flags;
1085 2477
1086 if (expect_true (!reify)) 2478 if (ecb_expect_true (!reify))
1087 { 2479 {
1088 ++fdchangecnt; 2480 ++fdchangecnt;
1089 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2481 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1090 fdchanges [fdchangecnt - 1] = fd; 2482 fdchanges [fdchangecnt - 1] = fd;
1091 } 2483 }
1092} 2484}
1093 2485
1094/* 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 */
1095inline_speed void 2487inline_speed ecb_cold void
1096fd_kill (EV_P_ int fd) 2488fd_kill (EV_P_ int fd)
1097{ 2489{
1098 ev_io *w; 2490 ev_io *w;
1099 2491
1100 while ((w = (ev_io *)anfds [fd].head)) 2492 while ((w = (ev_io *)anfds [fd].head))
… …
1103 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);
1104 } 2496 }
1105} 2497}
1106 2498
1107/* check whether the given fd is actually valid, for error recovery */ 2499/* check whether the given fd is actually valid, for error recovery */
1108inline_size int 2500inline_size ecb_cold int
1109fd_valid (int fd) 2501fd_valid (int fd)
1110{ 2502{
1111#ifdef _WIN32 2503#ifdef _WIN32
1112 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2504 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1113#else 2505#else
1114 return fcntl (fd, F_GETFD) != -1; 2506 return fcntl (fd, F_GETFD) != -1;
1115#endif 2507#endif
1116} 2508}
1117 2509
1118/* called on EBADF to verify fds */ 2510/* called on EBADF to verify fds */
1119static void noinline 2511ecb_noinline ecb_cold
2512static void
1120fd_ebadf (EV_P) 2513fd_ebadf (EV_P)
1121{ 2514{
1122 int fd; 2515 int fd;
1123 2516
1124 for (fd = 0; fd < anfdmax; ++fd) 2517 for (fd = 0; fd < anfdmax; ++fd)
… …
1126 if (!fd_valid (fd) && errno == EBADF) 2519 if (!fd_valid (fd) && errno == EBADF)
1127 fd_kill (EV_A_ fd); 2520 fd_kill (EV_A_ fd);
1128} 2521}
1129 2522
1130/* 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 */
1131static void noinline 2524ecb_noinline ecb_cold
2525static void
1132fd_enomem (EV_P) 2526fd_enomem (EV_P)
1133{ 2527{
1134 int fd; 2528 int fd;
1135 2529
1136 for (fd = anfdmax; fd--; ) 2530 for (fd = anfdmax; fd--; )
… …
1140 break; 2534 break;
1141 } 2535 }
1142} 2536}
1143 2537
1144/* 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 */
1145static void noinline 2539ecb_noinline
2540static void
1146fd_rearm_all (EV_P) 2541fd_rearm_all (EV_P)
1147{ 2542{
1148 int fd; 2543 int fd;
1149 2544
1150 for (fd = 0; fd < anfdmax; ++fd) 2545 for (fd = 0; fd < anfdmax; ++fd)
… …
1203 ev_tstamp minat; 2598 ev_tstamp minat;
1204 ANHE *minpos; 2599 ANHE *minpos;
1205 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2600 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1206 2601
1207 /* find minimum child */ 2602 /* find minimum child */
1208 if (expect_true (pos + DHEAP - 1 < E)) 2603 if (ecb_expect_true (pos + DHEAP - 1 < E))
1209 { 2604 {
1210 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2605 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1211 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));
1212 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));
1213 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));
1214 } 2609 }
1215 else if (pos < E) 2610 else if (pos < E)
1216 { 2611 {
1217 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2612 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1218 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2613 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1219 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2614 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1220 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2615 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1221 } 2616 }
1222 else 2617 else
1223 break; 2618 break;
1224 2619
1225 if (ANHE_at (he) <= minat) 2620 if (ANHE_at (he) <= minat)
… …
1233 2628
1234 heap [k] = he; 2629 heap [k] = he;
1235 ev_active (ANHE_w (he)) = k; 2630 ev_active (ANHE_w (he)) = k;
1236} 2631}
1237 2632
1238#else /* 4HEAP */ 2633#else /* not 4HEAP */
1239 2634
1240#define HEAP0 1 2635#define HEAP0 1
1241#define HPARENT(k) ((k) >> 1) 2636#define HPARENT(k) ((k) >> 1)
1242#define UPHEAP_DONE(p,k) (!(p)) 2637#define UPHEAP_DONE(p,k) (!(p))
1243 2638
… …
1315 upheap (heap, i + HEAP0); 2710 upheap (heap, i + HEAP0);
1316} 2711}
1317 2712
1318/*****************************************************************************/ 2713/*****************************************************************************/
1319 2714
1320/* associate signal watchers to a signal signal */ 2715/* associate signal watchers to a signal */
1321typedef struct 2716typedef struct
1322{ 2717{
1323 EV_ATOMIC_T pending; 2718 EV_ATOMIC_T pending;
1324#if EV_MULTIPLICITY 2719#if EV_MULTIPLICITY
1325 EV_P; 2720 EV_P;
… …
1331 2726
1332/*****************************************************************************/ 2727/*****************************************************************************/
1333 2728
1334#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2729#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1335 2730
1336static void noinline 2731ecb_noinline ecb_cold
2732static void
1337evpipe_init (EV_P) 2733evpipe_init (EV_P)
1338{ 2734{
1339 if (!ev_is_active (&pipe_w)) 2735 if (!ev_is_active (&pipe_w))
1340 { 2736 {
2737 int fds [2];
2738
1341# if EV_USE_EVENTFD 2739# if EV_USE_EVENTFD
2740 fds [0] = -1;
1342 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2741 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1343 if (evfd < 0 && errno == EINVAL) 2742 if (fds [1] < 0 && errno == EINVAL)
1344 evfd = eventfd (0, 0); 2743 fds [1] = eventfd (0, 0);
1345 2744
1346 if (evfd >= 0) 2745 if (fds [1] < 0)
2746# endif
1347 { 2747 {
2748 while (pipe (fds))
2749 ev_syserr ("(libev) error creating signal/async pipe");
2750
2751 fd_intern (fds [0]);
2752 }
2753
1348 evpipe [0] = -1; 2754 evpipe [0] = fds [0];
1349 fd_intern (evfd); /* doing it twice doesn't hurt */ 2755
1350 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));
1351 } 2806 }
1352 else 2807 else
1353# endif 2808#endif
1354 { 2809 {
1355 while (pipe (evpipe)) 2810#ifdef _WIN32
1356 ev_syserr ("(libev) error creating signal/async pipe"); 2811 WSABUF buf;
1357 2812 DWORD sent;
1358 fd_intern (evpipe [0]); 2813 buf.buf = (char *)&buf;
1359 fd_intern (evpipe [1]); 2814 buf.len = 1;
1360 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
1361 } 2819 }
1362 2820
1363 ev_io_start (EV_A_ &pipe_w);
1364 ev_unref (EV_A); /* watcher should not keep loop alive */
1365 }
1366}
1367
1368inline_size void
1369evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1370{
1371 if (!*flag)
1372 {
1373 *flag = 1;
1374
1375 pipe_write_skipped = 1;
1376
1377 if (pipe_write_wanted)
1378 {
1379 int old_errno = errno; /* save errno because write will clobber it */
1380 char dummy;
1381
1382 pipe_write_skipped = 0;
1383
1384#if EV_USE_EVENTFD
1385 if (evfd >= 0)
1386 {
1387 uint64_t counter = 1;
1388 write (evfd, &counter, sizeof (uint64_t));
1389 }
1390 else
1391#endif
1392 {
1393 /* win32 people keep sending patches that change this write() to send() */
1394 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1395 /* so when you think this write should be a send instead, please find out */
1396 /* where your send() is from - it's definitely not the microsoft send, and */
1397 /* tell me. thank you. */
1398 write (evpipe [1], &dummy, 1);
1399 }
1400
1401 errno = old_errno; 2821 errno = old_errno;
1402 }
1403 } 2822 }
1404} 2823}
1405 2824
1406/* called whenever the libev signal pipe */ 2825/* called whenever the libev signal pipe */
1407/* got some events (signal, async) */ 2826/* got some events (signal, async) */
… …
1411 int i; 2830 int i;
1412 2831
1413 if (revents & EV_READ) 2832 if (revents & EV_READ)
1414 { 2833 {
1415#if EV_USE_EVENTFD 2834#if EV_USE_EVENTFD
1416 if (evfd >= 0) 2835 if (evpipe [0] < 0)
1417 { 2836 {
1418 uint64_t counter; 2837 uint64_t counter;
1419 read (evfd, &counter, sizeof (uint64_t)); 2838 read (evpipe [1], &counter, sizeof (uint64_t));
1420 } 2839 }
1421 else 2840 else
1422#endif 2841#endif
1423 { 2842 {
1424 char dummy; 2843 char dummy[4];
1425 /* 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
1426 read (evpipe [0], &dummy, 1); 2852 read (evpipe [0], &dummy, sizeof (dummy));
2853#endif
1427 } 2854 }
1428 } 2855 }
1429 2856
1430 pipe_write_skipped = 0; 2857 pipe_write_skipped = 0;
2858
2859 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1431 2860
1432#if EV_SIGNAL_ENABLE 2861#if EV_SIGNAL_ENABLE
1433 if (sig_pending) 2862 if (sig_pending)
1434 { 2863 {
1435 sig_pending = 0; 2864 sig_pending = 0;
1436 2865
2866 ECB_MEMORY_FENCE;
2867
1437 for (i = EV_NSIG - 1; i--; ) 2868 for (i = EV_NSIG - 1; i--; )
1438 if (expect_false (signals [i].pending)) 2869 if (ecb_expect_false (signals [i].pending))
1439 ev_feed_signal_event (EV_A_ i + 1); 2870 ev_feed_signal_event (EV_A_ i + 1);
1440 } 2871 }
1441#endif 2872#endif
1442 2873
1443#if EV_ASYNC_ENABLE 2874#if EV_ASYNC_ENABLE
1444 if (async_pending) 2875 if (async_pending)
1445 { 2876 {
1446 async_pending = 0; 2877 async_pending = 0;
2878
2879 ECB_MEMORY_FENCE;
1447 2880
1448 for (i = asynccnt; i--; ) 2881 for (i = asynccnt; i--; )
1449 if (asyncs [i]->sent) 2882 if (asyncs [i]->sent)
1450 { 2883 {
1451 asyncs [i]->sent = 0; 2884 asyncs [i]->sent = 0;
2885 ECB_MEMORY_FENCE_RELEASE;
1452 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2886 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1453 } 2887 }
1454 } 2888 }
1455#endif 2889#endif
1456} 2890}
1457 2891
1458/*****************************************************************************/ 2892/*****************************************************************************/
1459 2893
1460void 2894void
1461ev_feed_signal (int signum) 2895ev_feed_signal (int signum) EV_NOEXCEPT
1462{ 2896{
1463#if EV_MULTIPLICITY 2897#if EV_MULTIPLICITY
2898 EV_P;
2899 ECB_MEMORY_FENCE_ACQUIRE;
1464 EV_P = signals [signum - 1].loop; 2900 EV_A = signals [signum - 1].loop;
1465 2901
1466 if (!EV_A) 2902 if (!EV_A)
1467 return; 2903 return;
1468#endif 2904#endif
1469 2905
1470 evpipe_init (EV_A);
1471
1472 signals [signum - 1].pending = 1; 2906 signals [signum - 1].pending = 1;
1473 evpipe_write (EV_A_ &sig_pending); 2907 evpipe_write (EV_A_ &sig_pending);
1474} 2908}
1475 2909
1476static void 2910static void
… …
1481#endif 2915#endif
1482 2916
1483 ev_feed_signal (signum); 2917 ev_feed_signal (signum);
1484} 2918}
1485 2919
1486void noinline 2920ecb_noinline
2921void
1487ev_feed_signal_event (EV_P_ int signum) 2922ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1488{ 2923{
1489 WL w; 2924 WL w;
1490 2925
1491 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2926 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1492 return; 2927 return;
1493 2928
1494 --signum; 2929 --signum;
1495 2930
1496#if EV_MULTIPLICITY 2931#if EV_MULTIPLICITY
1497 /* 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 */
1498 /* or, likely more useful, feeding a signal nobody is waiting for */ 2933 /* or, likely more useful, feeding a signal nobody is waiting for */
1499 2934
1500 if (expect_false (signals [signum].loop != EV_A)) 2935 if (ecb_expect_false (signals [signum].loop != EV_A))
1501 return; 2936 return;
1502#endif 2937#endif
1503 2938
1504 signals [signum].pending = 0; 2939 signals [signum].pending = 0;
2940 ECB_MEMORY_FENCE_RELEASE;
1505 2941
1506 for (w = signals [signum].head; w; w = w->next) 2942 for (w = signals [signum].head; w; w = w->next)
1507 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2943 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1508} 2944}
1509 2945
… …
1588 3024
1589#endif 3025#endif
1590 3026
1591/*****************************************************************************/ 3027/*****************************************************************************/
1592 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
1593#if EV_USE_IOCP 3080#if EV_USE_IOCP
1594# include "ev_iocp.c" 3081# include "ev_iocp.c"
1595#endif 3082#endif
1596#if EV_USE_PORT 3083#if EV_USE_PORT
1597# include "ev_port.c" 3084# include "ev_port.c"
… …
1600# include "ev_kqueue.c" 3087# include "ev_kqueue.c"
1601#endif 3088#endif
1602#if EV_USE_EPOLL 3089#if EV_USE_EPOLL
1603# include "ev_epoll.c" 3090# include "ev_epoll.c"
1604#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
1605#if EV_USE_POLL 3098#if EV_USE_POLL
1606# include "ev_poll.c" 3099# include "ev_poll.c"
1607#endif 3100#endif
1608#if EV_USE_SELECT 3101#if EV_USE_SELECT
1609# include "ev_select.c" 3102# include "ev_select.c"
1610#endif 3103#endif
1611 3104
1612int 3105ecb_cold int
1613ev_version_major (void) 3106ev_version_major (void) EV_NOEXCEPT
1614{ 3107{
1615 return EV_VERSION_MAJOR; 3108 return EV_VERSION_MAJOR;
1616} 3109}
1617 3110
1618int 3111ecb_cold int
1619ev_version_minor (void) 3112ev_version_minor (void) EV_NOEXCEPT
1620{ 3113{
1621 return EV_VERSION_MINOR; 3114 return EV_VERSION_MINOR;
1622} 3115}
1623 3116
1624/* 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 */
1625int inline_size 3118inline_size ecb_cold int
1626enable_secure (void) 3119enable_secure (void)
1627{ 3120{
1628#ifdef _WIN32 3121#ifdef _WIN32
1629 return 0; 3122 return 0;
1630#else 3123#else
1631 return getuid () != geteuid () 3124 return getuid () != geteuid ()
1632 || getgid () != getegid (); 3125 || getgid () != getegid ();
1633#endif 3126#endif
1634} 3127}
1635 3128
3129ecb_cold
1636unsigned int 3130unsigned int
1637ev_supported_backends (void) 3131ev_supported_backends (void) EV_NOEXCEPT
1638{ 3132{
1639 unsigned int flags = 0; 3133 unsigned int flags = 0;
1640 3134
1641 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3135 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1642 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3136 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1643 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3137 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1644 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3138 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1645 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3139 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1646 3140 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3141 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3142
1647 return flags; 3143 return flags;
1648} 3144}
1649 3145
3146ecb_cold
1650unsigned int 3147unsigned int
1651ev_recommended_backends (void) 3148ev_recommended_backends (void) EV_NOEXCEPT
1652{ 3149{
1653 unsigned int flags = ev_supported_backends (); 3150 unsigned int flags = ev_supported_backends ();
1654 3151
1655#ifndef __NetBSD__ 3152#ifndef __NetBSD__
1656 /* kqueue is borked on everything but netbsd apparently */ 3153 /* kqueue is borked on everything but netbsd apparently */
… …
1664#endif 3161#endif
1665#ifdef __FreeBSD__ 3162#ifdef __FreeBSD__
1666 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) */
1667#endif 3164#endif
1668 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
1669 return flags; 3175 return flags;
1670} 3176}
1671 3177
3178ecb_cold
1672unsigned int 3179unsigned int
1673ev_embeddable_backends (void) 3180ev_embeddable_backends (void) EV_NOEXCEPT
1674{ 3181{
1675 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3182 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
1676 3183
1677 /* 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 */
1678 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 */
1679 flags &= ~EVBACKEND_EPOLL; 3186 flags &= ~EVBACKEND_EPOLL;
1680 3187
3188 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
3189
1681 return flags; 3190 return flags;
1682} 3191}
1683 3192
1684unsigned int 3193unsigned int
1685ev_backend (EV_P) 3194ev_backend (EV_P) EV_NOEXCEPT
1686{ 3195{
1687 return backend; 3196 return backend;
1688} 3197}
1689 3198
1690#if EV_FEATURE_API 3199#if EV_FEATURE_API
1691unsigned int 3200unsigned int
1692ev_iteration (EV_P) 3201ev_iteration (EV_P) EV_NOEXCEPT
1693{ 3202{
1694 return loop_count; 3203 return loop_count;
1695} 3204}
1696 3205
1697unsigned int 3206unsigned int
1698ev_depth (EV_P) 3207ev_depth (EV_P) EV_NOEXCEPT
1699{ 3208{
1700 return loop_depth; 3209 return loop_depth;
1701} 3210}
1702 3211
1703void 3212void
1704ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3213ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1705{ 3214{
1706 io_blocktime = interval; 3215 io_blocktime = interval;
1707} 3216}
1708 3217
1709void 3218void
1710ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3219ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1711{ 3220{
1712 timeout_blocktime = interval; 3221 timeout_blocktime = interval;
1713} 3222}
1714 3223
1715void 3224void
1716ev_set_userdata (EV_P_ void *data) 3225ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1717{ 3226{
1718 userdata = data; 3227 userdata = data;
1719} 3228}
1720 3229
1721void * 3230void *
1722ev_userdata (EV_P) 3231ev_userdata (EV_P) EV_NOEXCEPT
1723{ 3232{
1724 return userdata; 3233 return userdata;
1725} 3234}
1726 3235
3236void
1727void ev_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
1728{ 3238{
1729 invoke_cb = invoke_pending_cb; 3239 invoke_cb = invoke_pending_cb;
1730} 3240}
1731 3241
3242void
1732void ev_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
1733{ 3244{
1734 release_cb = release; 3245 release_cb = release;
1735 acquire_cb = acquire; 3246 acquire_cb = acquire;
1736} 3247}
1737#endif 3248#endif
1738 3249
1739/* initialise a loop structure, must be zero-initialised */ 3250/* initialise a loop structure, must be zero-initialised */
1740static void noinline 3251ecb_noinline ecb_cold
3252static void
1741loop_init (EV_P_ unsigned int flags) 3253loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1742{ 3254{
1743 if (!backend) 3255 if (!backend)
1744 { 3256 {
1745 origflags = flags; 3257 origflags = flags;
1746 3258
… …
1791#if EV_ASYNC_ENABLE 3303#if EV_ASYNC_ENABLE
1792 async_pending = 0; 3304 async_pending = 0;
1793#endif 3305#endif
1794 pipe_write_skipped = 0; 3306 pipe_write_skipped = 0;
1795 pipe_write_wanted = 0; 3307 pipe_write_wanted = 0;
3308 evpipe [0] = -1;
3309 evpipe [1] = -1;
1796#if EV_USE_INOTIFY 3310#if EV_USE_INOTIFY
1797 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3311 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1798#endif 3312#endif
1799#if EV_USE_SIGNALFD 3313#if EV_USE_SIGNALFD
1800 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3314 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1801#endif 3315#endif
3316#if EV_USE_TIMERFD
3317 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3318#endif
1802 3319
1803 if (!(flags & EVBACKEND_MASK)) 3320 if (!(flags & EVBACKEND_MASK))
1804 flags |= ev_recommended_backends (); 3321 flags |= ev_recommended_backends ();
1805 3322
1806#if EV_USE_IOCP 3323#if EV_USE_IOCP
1807 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 3324 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1808#endif 3325#endif
1809#if EV_USE_PORT 3326#if EV_USE_PORT
1810 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3327 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1811#endif 3328#endif
1812#if EV_USE_KQUEUE 3329#if EV_USE_KQUEUE
1813 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);
1814#endif 3337#endif
1815#if EV_USE_EPOLL 3338#if EV_USE_EPOLL
1816 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3339 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1817#endif 3340#endif
1818#if EV_USE_POLL 3341#if EV_USE_POLL
1819 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3342 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1820#endif 3343#endif
1821#if EV_USE_SELECT 3344#if EV_USE_SELECT
1822 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3345 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1823#endif 3346#endif
1824 3347
1825 ev_prepare_init (&pending_w, pendingcb); 3348 ev_prepare_init (&pending_w, pendingcb);
1826 3349
1827#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3350#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1830#endif 3353#endif
1831 } 3354 }
1832} 3355}
1833 3356
1834/* free up a loop structure */ 3357/* free up a loop structure */
3358ecb_cold
1835void 3359void
1836ev_loop_destroy (EV_P) 3360ev_loop_destroy (EV_P)
1837{ 3361{
1838 int i; 3362 int i;
1839 3363
… …
1843 return; 3367 return;
1844#endif 3368#endif
1845 3369
1846#if EV_CLEANUP_ENABLE 3370#if EV_CLEANUP_ENABLE
1847 /* queue cleanup watchers (and execute them) */ 3371 /* queue cleanup watchers (and execute them) */
1848 if (expect_false (cleanupcnt)) 3372 if (ecb_expect_false (cleanupcnt))
1849 { 3373 {
1850 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); 3374 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1851 EV_INVOKE_PENDING; 3375 EV_INVOKE_PENDING;
1852 } 3376 }
1853#endif 3377#endif
1854 3378
1855#if EV_CHILD_ENABLE 3379#if EV_CHILD_ENABLE
1856 if (ev_is_active (&childev)) 3380 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1857 { 3381 {
1858 ev_ref (EV_A); /* child watcher */ 3382 ev_ref (EV_A); /* child watcher */
1859 ev_signal_stop (EV_A_ &childev); 3383 ev_signal_stop (EV_A_ &childev);
1860 } 3384 }
1861#endif 3385#endif
… …
1863 if (ev_is_active (&pipe_w)) 3387 if (ev_is_active (&pipe_w))
1864 { 3388 {
1865 /*ev_ref (EV_A);*/ 3389 /*ev_ref (EV_A);*/
1866 /*ev_io_stop (EV_A_ &pipe_w);*/ 3390 /*ev_io_stop (EV_A_ &pipe_w);*/
1867 3391
1868#if EV_USE_EVENTFD
1869 if (evfd >= 0)
1870 close (evfd);
1871#endif
1872
1873 if (evpipe [0] >= 0)
1874 {
1875 EV_WIN32_CLOSE_FD (evpipe [0]); 3392 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1876 EV_WIN32_CLOSE_FD (evpipe [1]); 3393 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1877 }
1878 } 3394 }
1879 3395
1880#if EV_USE_SIGNALFD 3396#if EV_USE_SIGNALFD
1881 if (ev_is_active (&sigfd_w)) 3397 if (ev_is_active (&sigfd_w))
1882 close (sigfd); 3398 close (sigfd);
1883#endif 3399#endif
1884 3400
3401#if EV_USE_TIMERFD
3402 if (ev_is_active (&timerfd_w))
3403 close (timerfd);
3404#endif
3405
1885#if EV_USE_INOTIFY 3406#if EV_USE_INOTIFY
1886 if (fs_fd >= 0) 3407 if (fs_fd >= 0)
1887 close (fs_fd); 3408 close (fs_fd);
1888#endif 3409#endif
1889 3410
1890 if (backend_fd >= 0) 3411 if (backend_fd >= 0)
1891 close (backend_fd); 3412 close (backend_fd);
1892 3413
1893#if EV_USE_IOCP 3414#if EV_USE_IOCP
1894 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); 3415 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1895#endif 3416#endif
1896#if EV_USE_PORT 3417#if EV_USE_PORT
1897 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3418 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1898#endif 3419#endif
1899#if EV_USE_KQUEUE 3420#if EV_USE_KQUEUE
1900 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);
1901#endif 3428#endif
1902#if EV_USE_EPOLL 3429#if EV_USE_EPOLL
1903 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3430 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1904#endif 3431#endif
1905#if EV_USE_POLL 3432#if EV_USE_POLL
1906 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3433 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1907#endif 3434#endif
1908#if EV_USE_SELECT 3435#if EV_USE_SELECT
1909 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3436 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1910#endif 3437#endif
1911 3438
1912 for (i = NUMPRI; i--; ) 3439 for (i = NUMPRI; i--; )
1913 { 3440 {
1914 array_free (pending, [i]); 3441 array_free (pending, [i]);
… …
1956 3483
1957inline_size void 3484inline_size void
1958loop_fork (EV_P) 3485loop_fork (EV_P)
1959{ 3486{
1960#if EV_USE_PORT 3487#if EV_USE_PORT
1961 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3488 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1962#endif 3489#endif
1963#if EV_USE_KQUEUE 3490#if EV_USE_KQUEUE
1964 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);
1965#endif 3498#endif
1966#if EV_USE_EPOLL 3499#if EV_USE_EPOLL
1967 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3500 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1968#endif 3501#endif
1969#if EV_USE_INOTIFY 3502#if EV_USE_INOTIFY
1970 infy_fork (EV_A); 3503 infy_fork (EV_A);
1971#endif 3504#endif
1972 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
1973 if (ev_is_active (&pipe_w)) 3528 if (ev_is_active (&pipe_w))
1974 { 3529 {
1975 /* 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 */
1976 3531
1977 ev_ref (EV_A); 3532 ev_ref (EV_A);
1978 ev_io_stop (EV_A_ &pipe_w); 3533 ev_io_stop (EV_A_ &pipe_w);
1979 3534
1980#if EV_USE_EVENTFD
1981 if (evfd >= 0)
1982 close (evfd);
1983#endif
1984
1985 if (evpipe [0] >= 0) 3535 if (evpipe [0] >= 0)
1986 {
1987 EV_WIN32_CLOSE_FD (evpipe [0]); 3536 EV_WIN32_CLOSE_FD (evpipe [0]);
1988 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);
1989 } 3541 }
1990 3542 #endif
1991#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1992 evpipe_init (EV_A);
1993 /* now iterate over everything, in case we missed something */
1994 pipecb (EV_A_ &pipe_w, EV_READ);
1995#endif
1996 } 3543 }
1997 3544
1998 postfork = 0; 3545 postfork = 0;
1999} 3546}
2000 3547
2001#if EV_MULTIPLICITY 3548#if EV_MULTIPLICITY
2002 3549
3550ecb_cold
2003struct ev_loop * 3551struct ev_loop *
2004ev_loop_new (unsigned int flags) 3552ev_loop_new (unsigned int flags) EV_NOEXCEPT
2005{ 3553{
2006 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3554 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2007 3555
2008 memset (EV_A, 0, sizeof (struct ev_loop)); 3556 memset (EV_A, 0, sizeof (struct ev_loop));
2009 loop_init (EV_A_ flags); 3557 loop_init (EV_A_ flags);
… …
2016} 3564}
2017 3565
2018#endif /* multiplicity */ 3566#endif /* multiplicity */
2019 3567
2020#if EV_VERIFY 3568#if EV_VERIFY
2021static void noinline 3569ecb_noinline ecb_cold
3570static void
2022verify_watcher (EV_P_ W w) 3571verify_watcher (EV_P_ W w)
2023{ 3572{
2024 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));
2025 3574
2026 if (w->pending) 3575 if (w->pending)
2027 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));
2028} 3577}
2029 3578
2030static void noinline 3579ecb_noinline ecb_cold
3580static void
2031verify_heap (EV_P_ ANHE *heap, int N) 3581verify_heap (EV_P_ ANHE *heap, int N)
2032{ 3582{
2033 int i; 3583 int i;
2034 3584
2035 for (i = HEAP0; i < N + HEAP0; ++i) 3585 for (i = HEAP0; i < N + HEAP0; ++i)
… …
2040 3590
2041 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3591 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2042 } 3592 }
2043} 3593}
2044 3594
2045static void noinline 3595ecb_noinline ecb_cold
3596static void
2046array_verify (EV_P_ W *ws, int cnt) 3597array_verify (EV_P_ W *ws, int cnt)
2047{ 3598{
2048 while (cnt--) 3599 while (cnt--)
2049 { 3600 {
2050 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
2052 } 3603 }
2053} 3604}
2054#endif 3605#endif
2055 3606
2056#if EV_FEATURE_API 3607#if EV_FEATURE_API
2057void 3608void ecb_cold
2058ev_verify (EV_P) 3609ev_verify (EV_P) EV_NOEXCEPT
2059{ 3610{
2060#if EV_VERIFY 3611#if EV_VERIFY
2061 int i; 3612 int i;
2062 WL w; 3613 WL w, w2;
2063 3614
2064 assert (activecnt >= -1); 3615 assert (activecnt >= -1);
2065 3616
2066 assert (fdchangemax >= fdchangecnt); 3617 assert (fdchangemax >= fdchangecnt);
2067 for (i = 0; i < fdchangecnt; ++i) 3618 for (i = 0; i < fdchangecnt; ++i)
2068 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3619 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2069 3620
2070 assert (anfdmax >= 0); 3621 assert (anfdmax >= 0);
2071 for (i = 0; i < anfdmax; ++i) 3622 for (i = 0; i < anfdmax; ++i)
3623 {
3624 int j = 0;
3625
2072 for (w = anfds [i].head; w; w = w->next) 3626 for (w = w2 = anfds [i].head; w; w = w->next)
2073 { 3627 {
2074 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
2075 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));
2076 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));
2077 } 3638 }
3639 }
2078 3640
2079 assert (timermax >= timercnt); 3641 assert (timermax >= timercnt);
2080 verify_heap (EV_A_ timers, timercnt); 3642 verify_heap (EV_A_ timers, timercnt);
2081 3643
2082#if EV_PERIODIC_ENABLE 3644#if EV_PERIODIC_ENABLE
… …
2128#endif 3690#endif
2129} 3691}
2130#endif 3692#endif
2131 3693
2132#if EV_MULTIPLICITY 3694#if EV_MULTIPLICITY
3695ecb_cold
2133struct ev_loop * 3696struct ev_loop *
2134#else 3697#else
2135int 3698int
2136#endif 3699#endif
2137ev_default_loop (unsigned int flags) 3700ev_default_loop (unsigned int flags) EV_NOEXCEPT
2138{ 3701{
2139 if (!ev_default_loop_ptr) 3702 if (!ev_default_loop_ptr)
2140 { 3703 {
2141#if EV_MULTIPLICITY 3704#if EV_MULTIPLICITY
2142 EV_P = ev_default_loop_ptr = &default_loop_struct; 3705 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2161 3724
2162 return ev_default_loop_ptr; 3725 return ev_default_loop_ptr;
2163} 3726}
2164 3727
2165void 3728void
2166ev_loop_fork (EV_P) 3729ev_loop_fork (EV_P) EV_NOEXCEPT
2167{ 3730{
2168 postfork = 1; /* must be in line with ev_default_fork */ 3731 postfork = 1;
2169} 3732}
2170 3733
2171/*****************************************************************************/ 3734/*****************************************************************************/
2172 3735
2173void 3736void
… …
2175{ 3738{
2176 EV_CB_INVOKE ((W)w, revents); 3739 EV_CB_INVOKE ((W)w, revents);
2177} 3740}
2178 3741
2179unsigned int 3742unsigned int
2180ev_pending_count (EV_P) 3743ev_pending_count (EV_P) EV_NOEXCEPT
2181{ 3744{
2182 int pri; 3745 int pri;
2183 unsigned int count = 0; 3746 unsigned int count = 0;
2184 3747
2185 for (pri = NUMPRI; pri--; ) 3748 for (pri = NUMPRI; pri--; )
2186 count += pendingcnt [pri]; 3749 count += pendingcnt [pri];
2187 3750
2188 return count; 3751 return count;
2189} 3752}
2190 3753
2191void noinline 3754ecb_noinline
3755void
2192ev_invoke_pending (EV_P) 3756ev_invoke_pending (EV_P)
2193{ 3757{
2194 int pri; 3758 pendingpri = NUMPRI;
2195 3759
2196 for (pri = NUMPRI; pri--; ) 3760 do
3761 {
3762 --pendingpri;
3763
3764 /* pendingpri possibly gets modified in the inner loop */
2197 while (pendingcnt [pri]) 3765 while (pendingcnt [pendingpri])
2198 { 3766 {
2199 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3767 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2200 3768
2201 p->w->pending = 0; 3769 p->w->pending = 0;
2202 EV_CB_INVOKE (p->w, p->events); 3770 EV_CB_INVOKE (p->w, p->events);
2203 EV_FREQUENT_CHECK; 3771 EV_FREQUENT_CHECK;
2204 } 3772 }
3773 }
3774 while (pendingpri);
2205} 3775}
2206 3776
2207#if EV_IDLE_ENABLE 3777#if EV_IDLE_ENABLE
2208/* make idle watchers pending. this handles the "call-idle */ 3778/* make idle watchers pending. this handles the "call-idle */
2209/* only when higher priorities are idle" logic */ 3779/* only when higher priorities are idle" logic */
2210inline_size void 3780inline_size void
2211idle_reify (EV_P) 3781idle_reify (EV_P)
2212{ 3782{
2213 if (expect_false (idleall)) 3783 if (ecb_expect_false (idleall))
2214 { 3784 {
2215 int pri; 3785 int pri;
2216 3786
2217 for (pri = NUMPRI; pri--; ) 3787 for (pri = NUMPRI; pri--; )
2218 { 3788 {
… …
2248 { 3818 {
2249 ev_at (w) += w->repeat; 3819 ev_at (w) += w->repeat;
2250 if (ev_at (w) < mn_now) 3820 if (ev_at (w) < mn_now)
2251 ev_at (w) = mn_now; 3821 ev_at (w) = mn_now;
2252 3822
2253 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.)));
2254 3824
2255 ANHE_at_cache (timers [HEAP0]); 3825 ANHE_at_cache (timers [HEAP0]);
2256 downheap (timers, timercnt, HEAP0); 3826 downheap (timers, timercnt, HEAP0);
2257 } 3827 }
2258 else 3828 else
… …
2267 } 3837 }
2268} 3838}
2269 3839
2270#if EV_PERIODIC_ENABLE 3840#if EV_PERIODIC_ENABLE
2271 3841
2272static void noinline 3842ecb_noinline
3843static void
2273periodic_recalc (EV_P_ ev_periodic *w) 3844periodic_recalc (EV_P_ ev_periodic *w)
2274{ 3845{
2275 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; 3846 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2276 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);
2277 3848
… …
2279 while (at <= ev_rt_now) 3850 while (at <= ev_rt_now)
2280 { 3851 {
2281 ev_tstamp nat = at + w->interval; 3852 ev_tstamp nat = at + w->interval;
2282 3853
2283 /* when resolution fails us, we use ev_rt_now */ 3854 /* when resolution fails us, we use ev_rt_now */
2284 if (expect_false (nat == at)) 3855 if (ecb_expect_false (nat == at))
2285 { 3856 {
2286 at = ev_rt_now; 3857 at = ev_rt_now;
2287 break; 3858 break;
2288 } 3859 }
2289 3860
… …
2299{ 3870{
2300 EV_FREQUENT_CHECK; 3871 EV_FREQUENT_CHECK;
2301 3872
2302 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2303 { 3874 {
2304 int feed_count = 0;
2305
2306 do 3875 do
2307 { 3876 {
2308 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3877 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2309 3878
2310 /*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)));*/
… …
2337 } 3906 }
2338} 3907}
2339 3908
2340/* simply recalculate all periodics */ 3909/* simply recalculate all periodics */
2341/* 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? */
2342static void noinline 3911ecb_noinline ecb_cold
3912static void
2343periodics_reschedule (EV_P) 3913periodics_reschedule (EV_P)
2344{ 3914{
2345 int i; 3915 int i;
2346 3916
2347 /* adjust periodics after time jump */ 3917 /* adjust periodics after time jump */
… …
2360 reheap (periodics, periodiccnt); 3930 reheap (periodics, periodiccnt);
2361} 3931}
2362#endif 3932#endif
2363 3933
2364/* adjust all timers by a given offset */ 3934/* adjust all timers by a given offset */
2365static void noinline 3935ecb_noinline ecb_cold
3936static void
2366timers_reschedule (EV_P_ ev_tstamp adjust) 3937timers_reschedule (EV_P_ ev_tstamp adjust)
2367{ 3938{
2368 int i; 3939 int i;
2369 3940
2370 for (i = 0; i < timercnt; ++i) 3941 for (i = 0; i < timercnt; ++i)
… …
2379/* also detect if there was a timejump, and act accordingly */ 3950/* also detect if there was a timejump, and act accordingly */
2380inline_speed void 3951inline_speed void
2381time_update (EV_P_ ev_tstamp max_block) 3952time_update (EV_P_ ev_tstamp max_block)
2382{ 3953{
2383#if EV_USE_MONOTONIC 3954#if EV_USE_MONOTONIC
2384 if (expect_true (have_monotonic)) 3955 if (ecb_expect_true (have_monotonic))
2385 { 3956 {
2386 int i; 3957 int i;
2387 ev_tstamp odiff = rtmn_diff; 3958 ev_tstamp odiff = rtmn_diff;
2388 3959
2389 mn_now = get_clock (); 3960 mn_now = get_clock ();
2390 3961
2391 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3962 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2392 /* interpolate in the meantime */ 3963 /* interpolate in the meantime */
2393 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)))
2394 { 3965 {
2395 ev_rt_now = rtmn_diff + mn_now; 3966 ev_rt_now = rtmn_diff + mn_now;
2396 return; 3967 return;
2397 } 3968 }
2398 3969
… …
2412 ev_tstamp diff; 3983 ev_tstamp diff;
2413 rtmn_diff = ev_rt_now - mn_now; 3984 rtmn_diff = ev_rt_now - mn_now;
2414 3985
2415 diff = odiff - rtmn_diff; 3986 diff = odiff - rtmn_diff;
2416 3987
2417 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)))
2418 return; /* all is well */ 3989 return; /* all is well */
2419 3990
2420 ev_rt_now = ev_time (); 3991 ev_rt_now = ev_time ();
2421 mn_now = get_clock (); 3992 mn_now = get_clock ();
2422 now_floor = mn_now; 3993 now_floor = mn_now;
… …
2431 else 4002 else
2432#endif 4003#endif
2433 { 4004 {
2434 ev_rt_now = ev_time (); 4005 ev_rt_now = ev_time ();
2435 4006
2436 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)))
2437 { 4008 {
2438 /* 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 */
2439 timers_reschedule (EV_A_ ev_rt_now - mn_now); 4010 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2440#if EV_PERIODIC_ENABLE 4011#if EV_PERIODIC_ENABLE
2441 periodics_reschedule (EV_A); 4012 periodics_reschedule (EV_A);
… …
2444 4015
2445 mn_now = ev_rt_now; 4016 mn_now = ev_rt_now;
2446 } 4017 }
2447} 4018}
2448 4019
2449void 4020int
2450ev_run (EV_P_ int flags) 4021ev_run (EV_P_ int flags)
2451{ 4022{
2452#if EV_FEATURE_API 4023#if EV_FEATURE_API
2453 ++loop_depth; 4024 ++loop_depth;
2454#endif 4025#endif
… …
2464#if EV_VERIFY >= 2 4035#if EV_VERIFY >= 2
2465 ev_verify (EV_A); 4036 ev_verify (EV_A);
2466#endif 4037#endif
2467 4038
2468#ifndef _WIN32 4039#ifndef _WIN32
2469 if (expect_false (curpid)) /* penalise the forking check even more */ 4040 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2470 if (expect_false (getpid () != curpid)) 4041 if (ecb_expect_false (getpid () != curpid))
2471 { 4042 {
2472 curpid = getpid (); 4043 curpid = getpid ();
2473 postfork = 1; 4044 postfork = 1;
2474 } 4045 }
2475#endif 4046#endif
2476 4047
2477#if EV_FORK_ENABLE 4048#if EV_FORK_ENABLE
2478 /* we might have forked, so queue fork handlers */ 4049 /* we might have forked, so queue fork handlers */
2479 if (expect_false (postfork)) 4050 if (ecb_expect_false (postfork))
2480 if (forkcnt) 4051 if (forkcnt)
2481 { 4052 {
2482 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 4053 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2483 EV_INVOKE_PENDING; 4054 EV_INVOKE_PENDING;
2484 } 4055 }
2485#endif 4056#endif
2486 4057
2487#if EV_PREPARE_ENABLE 4058#if EV_PREPARE_ENABLE
2488 /* queue prepare watchers (and execute them) */ 4059 /* queue prepare watchers (and execute them) */
2489 if (expect_false (preparecnt)) 4060 if (ecb_expect_false (preparecnt))
2490 { 4061 {
2491 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 4062 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2492 EV_INVOKE_PENDING; 4063 EV_INVOKE_PENDING;
2493 } 4064 }
2494#endif 4065#endif
2495 4066
2496 if (expect_false (loop_done)) 4067 if (ecb_expect_false (loop_done))
2497 break; 4068 break;
2498 4069
2499 /* we might have forked, so reify kernel state if necessary */ 4070 /* we might have forked, so reify kernel state if necessary */
2500 if (expect_false (postfork)) 4071 if (ecb_expect_false (postfork))
2501 loop_fork (EV_A); 4072 loop_fork (EV_A);
2502 4073
2503 /* update fd-related kernel structures */ 4074 /* update fd-related kernel structures */
2504 fd_reify (EV_A); 4075 fd_reify (EV_A);
2505 4076
… …
2510 4081
2511 /* remember old timestamp for io_blocktime calculation */ 4082 /* remember old timestamp for io_blocktime calculation */
2512 ev_tstamp prev_mn_now = mn_now; 4083 ev_tstamp prev_mn_now = mn_now;
2513 4084
2514 /* update time to cancel out callback processing overhead */ 4085 /* update time to cancel out callback processing overhead */
2515 time_update (EV_A_ 1e100); 4086 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
2516 4087
2517 /* from now on, we want a pipe-wake-up */ 4088 /* from now on, we want a pipe-wake-up */
2518 pipe_write_wanted = 1; 4089 pipe_write_wanted = 1;
2519 4090
4091 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
4092
2520 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) 4093 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2521 { 4094 {
2522 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
2523 4108
2524 if (timercnt) 4109 if (timercnt)
2525 { 4110 {
2526 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 4111 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2527 if (waittime > to) waittime = to; 4112 if (waittime > to) waittime = to;
… …
2534 if (waittime > to) waittime = to; 4119 if (waittime > to) waittime = to;
2535 } 4120 }
2536#endif 4121#endif
2537 4122
2538 /* don't let timeouts decrease the waittime below timeout_blocktime */ 4123 /* don't let timeouts decrease the waittime below timeout_blocktime */
2539 if (expect_false (waittime < timeout_blocktime)) 4124 if (ecb_expect_false (waittime < timeout_blocktime))
2540 waittime = timeout_blocktime; 4125 waittime = timeout_blocktime;
2541 4126
2542 /* at this point, we NEED to wait, so we have to ensure */ 4127 /* now there are two more special cases left, either we have
2543 /* 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 */
2544 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.)
2545 waittime = backend_mintime; 4135 : backend_mintime;
2546 4136
2547 /* extra check because io_blocktime is commonly 0 */ 4137 /* extra check because io_blocktime is commonly 0 */
2548 if (expect_false (io_blocktime)) 4138 if (ecb_expect_false (io_blocktime))
2549 { 4139 {
2550 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4140 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2551 4141
2552 if (sleeptime > waittime - backend_mintime) 4142 if (sleeptime > waittime - backend_mintime)
2553 sleeptime = waittime - backend_mintime; 4143 sleeptime = waittime - backend_mintime;
2554 4144
2555 if (expect_true (sleeptime > 0.)) 4145 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2556 { 4146 {
2557 ev_sleep (sleeptime); 4147 ev_sleep (sleeptime);
2558 waittime -= sleeptime; 4148 waittime -= sleeptime;
2559 } 4149 }
2560 } 4150 }
… …
2565#endif 4155#endif
2566 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 4156 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2567 backend_poll (EV_A_ waittime); 4157 backend_poll (EV_A_ waittime);
2568 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 4158 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2569 4159
2570 pipe_write_wanted = 0; 4160 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2571 4161
4162 ECB_MEMORY_FENCE_ACQUIRE;
2572 if (pipe_write_skipped) 4163 if (pipe_write_skipped)
2573 { 4164 {
2574 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)));
2575 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 4166 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2576 } 4167 }
2577 4168
2578
2579 /* update ev_rt_now, do magic */ 4169 /* update ev_rt_now, do magic */
2580 time_update (EV_A_ waittime + sleeptime); 4170 time_update (EV_A_ waittime + sleeptime);
2581 } 4171 }
2582 4172
2583 /* queue pending timers and reschedule them */ 4173 /* queue pending timers and reschedule them */
… …
2591 idle_reify (EV_A); 4181 idle_reify (EV_A);
2592#endif 4182#endif
2593 4183
2594#if EV_CHECK_ENABLE 4184#if EV_CHECK_ENABLE
2595 /* queue check watchers, to be executed first */ 4185 /* queue check watchers, to be executed first */
2596 if (expect_false (checkcnt)) 4186 if (ecb_expect_false (checkcnt))
2597 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4187 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2598#endif 4188#endif
2599 4189
2600 EV_INVOKE_PENDING; 4190 EV_INVOKE_PENDING;
2601 } 4191 }
2602 while (expect_true ( 4192 while (ecb_expect_true (
2603 activecnt 4193 activecnt
2604 && !loop_done 4194 && !loop_done
2605 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) 4195 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2606 )); 4196 ));
2607 4197
… …
2609 loop_done = EVBREAK_CANCEL; 4199 loop_done = EVBREAK_CANCEL;
2610 4200
2611#if EV_FEATURE_API 4201#if EV_FEATURE_API
2612 --loop_depth; 4202 --loop_depth;
2613#endif 4203#endif
4204
4205 return activecnt;
2614} 4206}
2615 4207
2616void 4208void
2617ev_break (EV_P_ int how) 4209ev_break (EV_P_ int how) EV_NOEXCEPT
2618{ 4210{
2619 loop_done = how; 4211 loop_done = how;
2620} 4212}
2621 4213
2622void 4214void
2623ev_ref (EV_P) 4215ev_ref (EV_P) EV_NOEXCEPT
2624{ 4216{
2625 ++activecnt; 4217 ++activecnt;
2626} 4218}
2627 4219
2628void 4220void
2629ev_unref (EV_P) 4221ev_unref (EV_P) EV_NOEXCEPT
2630{ 4222{
2631 --activecnt; 4223 --activecnt;
2632} 4224}
2633 4225
2634void 4226void
2635ev_now_update (EV_P) 4227ev_now_update (EV_P) EV_NOEXCEPT
2636{ 4228{
2637 time_update (EV_A_ 1e100); 4229 time_update (EV_A_ EV_TSTAMP_HUGE);
2638} 4230}
2639 4231
2640void 4232void
2641ev_suspend (EV_P) 4233ev_suspend (EV_P) EV_NOEXCEPT
2642{ 4234{
2643 ev_now_update (EV_A); 4235 ev_now_update (EV_A);
2644} 4236}
2645 4237
2646void 4238void
2647ev_resume (EV_P) 4239ev_resume (EV_P) EV_NOEXCEPT
2648{ 4240{
2649 ev_tstamp mn_prev = mn_now; 4241 ev_tstamp mn_prev = mn_now;
2650 4242
2651 ev_now_update (EV_A); 4243 ev_now_update (EV_A);
2652 timers_reschedule (EV_A_ mn_now - mn_prev); 4244 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2669inline_size void 4261inline_size void
2670wlist_del (WL *head, WL elem) 4262wlist_del (WL *head, WL elem)
2671{ 4263{
2672 while (*head) 4264 while (*head)
2673 { 4265 {
2674 if (expect_true (*head == elem)) 4266 if (ecb_expect_true (*head == elem))
2675 { 4267 {
2676 *head = elem->next; 4268 *head = elem->next;
2677 break; 4269 break;
2678 } 4270 }
2679 4271
… …
2691 w->pending = 0; 4283 w->pending = 0;
2692 } 4284 }
2693} 4285}
2694 4286
2695int 4287int
2696ev_clear_pending (EV_P_ void *w) 4288ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2697{ 4289{
2698 W w_ = (W)w; 4290 W w_ = (W)w;
2699 int pending = w_->pending; 4291 int pending = w_->pending;
2700 4292
2701 if (expect_true (pending)) 4293 if (ecb_expect_true (pending))
2702 { 4294 {
2703 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4295 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2704 p->w = (W)&pending_w; 4296 p->w = (W)&pending_w;
2705 w_->pending = 0; 4297 w_->pending = 0;
2706 return p->events; 4298 return p->events;
… …
2733 w->active = 0; 4325 w->active = 0;
2734} 4326}
2735 4327
2736/*****************************************************************************/ 4328/*****************************************************************************/
2737 4329
2738void noinline 4330ecb_noinline
4331void
2739ev_io_start (EV_P_ ev_io *w) 4332ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2740{ 4333{
2741 int fd = w->fd; 4334 int fd = w->fd;
2742 4335
2743 if (expect_false (ev_is_active (w))) 4336 if (ecb_expect_false (ev_is_active (w)))
2744 return; 4337 return;
2745 4338
2746 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4339 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2747 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))));
2748 4341
4342#if EV_VERIFY >= 2
4343 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4344#endif
2749 EV_FREQUENT_CHECK; 4345 EV_FREQUENT_CHECK;
2750 4346
2751 ev_start (EV_A_ (W)w, 1); 4347 ev_start (EV_A_ (W)w, 1);
2752 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4348 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2753 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));
2754 4353
2755 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);
2756 w->events &= ~EV__IOFDSET; 4355 w->events &= ~EV__IOFDSET;
2757 4356
2758 EV_FREQUENT_CHECK; 4357 EV_FREQUENT_CHECK;
2759} 4358}
2760 4359
2761void noinline 4360ecb_noinline
4361void
2762ev_io_stop (EV_P_ ev_io *w) 4362ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2763{ 4363{
2764 clear_pending (EV_A_ (W)w); 4364 clear_pending (EV_A_ (W)w);
2765 if (expect_false (!ev_is_active (w))) 4365 if (ecb_expect_false (!ev_is_active (w)))
2766 return; 4366 return;
2767 4367
2768 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));
2769 4369
4370#if EV_VERIFY >= 2
4371 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4372#endif
2770 EV_FREQUENT_CHECK; 4373 EV_FREQUENT_CHECK;
2771 4374
2772 wlist_del (&anfds[w->fd].head, (WL)w); 4375 wlist_del (&anfds[w->fd].head, (WL)w);
2773 ev_stop (EV_A_ (W)w); 4376 ev_stop (EV_A_ (W)w);
2774 4377
2775 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 4378 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2776 4379
2777 EV_FREQUENT_CHECK; 4380 EV_FREQUENT_CHECK;
2778} 4381}
2779 4382
2780void noinline 4383ecb_noinline
4384void
2781ev_timer_start (EV_P_ ev_timer *w) 4385ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2782{ 4386{
2783 if (expect_false (ev_is_active (w))) 4387 if (ecb_expect_false (ev_is_active (w)))
2784 return; 4388 return;
2785 4389
2786 ev_at (w) += mn_now; 4390 ev_at (w) += mn_now;
2787 4391
2788 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.));
2789 4393
2790 EV_FREQUENT_CHECK; 4394 EV_FREQUENT_CHECK;
2791 4395
2792 ++timercnt; 4396 ++timercnt;
2793 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4397 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2794 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4398 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2795 ANHE_w (timers [ev_active (w)]) = (WT)w; 4399 ANHE_w (timers [ev_active (w)]) = (WT)w;
2796 ANHE_at_cache (timers [ev_active (w)]); 4400 ANHE_at_cache (timers [ev_active (w)]);
2797 upheap (timers, ev_active (w)); 4401 upheap (timers, ev_active (w));
2798 4402
2799 EV_FREQUENT_CHECK; 4403 EV_FREQUENT_CHECK;
2800 4404
2801 /*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));*/
2802} 4406}
2803 4407
2804void noinline 4408ecb_noinline
4409void
2805ev_timer_stop (EV_P_ ev_timer *w) 4410ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2806{ 4411{
2807 clear_pending (EV_A_ (W)w); 4412 clear_pending (EV_A_ (W)w);
2808 if (expect_false (!ev_is_active (w))) 4413 if (ecb_expect_false (!ev_is_active (w)))
2809 return; 4414 return;
2810 4415
2811 EV_FREQUENT_CHECK; 4416 EV_FREQUENT_CHECK;
2812 4417
2813 { 4418 {
… …
2815 4420
2816 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));
2817 4422
2818 --timercnt; 4423 --timercnt;
2819 4424
2820 if (expect_true (active < timercnt + HEAP0)) 4425 if (ecb_expect_true (active < timercnt + HEAP0))
2821 { 4426 {
2822 timers [active] = timers [timercnt + HEAP0]; 4427 timers [active] = timers [timercnt + HEAP0];
2823 adjustheap (timers, timercnt, active); 4428 adjustheap (timers, timercnt, active);
2824 } 4429 }
2825 } 4430 }
… …
2829 ev_stop (EV_A_ (W)w); 4434 ev_stop (EV_A_ (W)w);
2830 4435
2831 EV_FREQUENT_CHECK; 4436 EV_FREQUENT_CHECK;
2832} 4437}
2833 4438
2834void noinline 4439ecb_noinline
4440void
2835ev_timer_again (EV_P_ ev_timer *w) 4441ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2836{ 4442{
2837 EV_FREQUENT_CHECK; 4443 EV_FREQUENT_CHECK;
4444
4445 clear_pending (EV_A_ (W)w);
2838 4446
2839 if (ev_is_active (w)) 4447 if (ev_is_active (w))
2840 { 4448 {
2841 if (w->repeat) 4449 if (w->repeat)
2842 { 4450 {
… …
2855 4463
2856 EV_FREQUENT_CHECK; 4464 EV_FREQUENT_CHECK;
2857} 4465}
2858 4466
2859ev_tstamp 4467ev_tstamp
2860ev_timer_remaining (EV_P_ ev_timer *w) 4468ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2861{ 4469{
2862 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.));
2863} 4471}
2864 4472
2865#if EV_PERIODIC_ENABLE 4473#if EV_PERIODIC_ENABLE
2866void noinline 4474ecb_noinline
4475void
2867ev_periodic_start (EV_P_ ev_periodic *w) 4476ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2868{ 4477{
2869 if (expect_false (ev_is_active (w))) 4478 if (ecb_expect_false (ev_is_active (w)))
2870 return; 4479 return;
4480
4481#if EV_USE_TIMERFD
4482 if (timerfd == -2)
4483 evtimerfd_init (EV_A);
4484#endif
2871 4485
2872 if (w->reschedule_cb) 4486 if (w->reschedule_cb)
2873 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4487 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2874 else if (w->interval) 4488 else if (w->interval)
2875 { 4489 {
… …
2881 4495
2882 EV_FREQUENT_CHECK; 4496 EV_FREQUENT_CHECK;
2883 4497
2884 ++periodiccnt; 4498 ++periodiccnt;
2885 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4499 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2886 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4500 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2887 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4501 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2888 ANHE_at_cache (periodics [ev_active (w)]); 4502 ANHE_at_cache (periodics [ev_active (w)]);
2889 upheap (periodics, ev_active (w)); 4503 upheap (periodics, ev_active (w));
2890 4504
2891 EV_FREQUENT_CHECK; 4505 EV_FREQUENT_CHECK;
2892 4506
2893 /*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));*/
2894} 4508}
2895 4509
2896void noinline 4510ecb_noinline
4511void
2897ev_periodic_stop (EV_P_ ev_periodic *w) 4512ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2898{ 4513{
2899 clear_pending (EV_A_ (W)w); 4514 clear_pending (EV_A_ (W)w);
2900 if (expect_false (!ev_is_active (w))) 4515 if (ecb_expect_false (!ev_is_active (w)))
2901 return; 4516 return;
2902 4517
2903 EV_FREQUENT_CHECK; 4518 EV_FREQUENT_CHECK;
2904 4519
2905 { 4520 {
… …
2907 4522
2908 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));
2909 4524
2910 --periodiccnt; 4525 --periodiccnt;
2911 4526
2912 if (expect_true (active < periodiccnt + HEAP0)) 4527 if (ecb_expect_true (active < periodiccnt + HEAP0))
2913 { 4528 {
2914 periodics [active] = periodics [periodiccnt + HEAP0]; 4529 periodics [active] = periodics [periodiccnt + HEAP0];
2915 adjustheap (periodics, periodiccnt, active); 4530 adjustheap (periodics, periodiccnt, active);
2916 } 4531 }
2917 } 4532 }
… …
2919 ev_stop (EV_A_ (W)w); 4534 ev_stop (EV_A_ (W)w);
2920 4535
2921 EV_FREQUENT_CHECK; 4536 EV_FREQUENT_CHECK;
2922} 4537}
2923 4538
2924void noinline 4539ecb_noinline
4540void
2925ev_periodic_again (EV_P_ ev_periodic *w) 4541ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2926{ 4542{
2927 /* TODO: use adjustheap and recalculation */ 4543 /* TODO: use adjustheap and recalculation */
2928 ev_periodic_stop (EV_A_ w); 4544 ev_periodic_stop (EV_A_ w);
2929 ev_periodic_start (EV_A_ w); 4545 ev_periodic_start (EV_A_ w);
2930} 4546}
… …
2934# define SA_RESTART 0 4550# define SA_RESTART 0
2935#endif 4551#endif
2936 4552
2937#if EV_SIGNAL_ENABLE 4553#if EV_SIGNAL_ENABLE
2938 4554
2939void noinline 4555ecb_noinline
4556void
2940ev_signal_start (EV_P_ ev_signal *w) 4557ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2941{ 4558{
2942 if (expect_false (ev_is_active (w))) 4559 if (ecb_expect_false (ev_is_active (w)))
2943 return; 4560 return;
2944 4561
2945 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));
2946 4563
2947#if EV_MULTIPLICITY 4564#if EV_MULTIPLICITY
2948 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",
2949 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4566 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2950 4567
2951 signals [w->signum - 1].loop = EV_A; 4568 signals [w->signum - 1].loop = EV_A;
4569 ECB_MEMORY_FENCE_RELEASE;
2952#endif 4570#endif
2953 4571
2954 EV_FREQUENT_CHECK; 4572 EV_FREQUENT_CHECK;
2955 4573
2956#if EV_USE_SIGNALFD 4574#if EV_USE_SIGNALFD
… …
3015 } 4633 }
3016 4634
3017 EV_FREQUENT_CHECK; 4635 EV_FREQUENT_CHECK;
3018} 4636}
3019 4637
3020void noinline 4638ecb_noinline
4639void
3021ev_signal_stop (EV_P_ ev_signal *w) 4640ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
3022{ 4641{
3023 clear_pending (EV_A_ (W)w); 4642 clear_pending (EV_A_ (W)w);
3024 if (expect_false (!ev_is_active (w))) 4643 if (ecb_expect_false (!ev_is_active (w)))
3025 return; 4644 return;
3026 4645
3027 EV_FREQUENT_CHECK; 4646 EV_FREQUENT_CHECK;
3028 4647
3029 wlist_del (&signals [w->signum - 1].head, (WL)w); 4648 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
3057#endif 4676#endif
3058 4677
3059#if EV_CHILD_ENABLE 4678#if EV_CHILD_ENABLE
3060 4679
3061void 4680void
3062ev_child_start (EV_P_ ev_child *w) 4681ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
3063{ 4682{
3064#if EV_MULTIPLICITY 4683#if EV_MULTIPLICITY
3065 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));
3066#endif 4685#endif
3067 if (expect_false (ev_is_active (w))) 4686 if (ecb_expect_false (ev_is_active (w)))
3068 return; 4687 return;
3069 4688
3070 EV_FREQUENT_CHECK; 4689 EV_FREQUENT_CHECK;
3071 4690
3072 ev_start (EV_A_ (W)w, 1); 4691 ev_start (EV_A_ (W)w, 1);
… …
3074 4693
3075 EV_FREQUENT_CHECK; 4694 EV_FREQUENT_CHECK;
3076} 4695}
3077 4696
3078void 4697void
3079ev_child_stop (EV_P_ ev_child *w) 4698ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
3080{ 4699{
3081 clear_pending (EV_A_ (W)w); 4700 clear_pending (EV_A_ (W)w);
3082 if (expect_false (!ev_is_active (w))) 4701 if (ecb_expect_false (!ev_is_active (w)))
3083 return; 4702 return;
3084 4703
3085 EV_FREQUENT_CHECK; 4704 EV_FREQUENT_CHECK;
3086 4705
3087 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); 4706 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
… …
3101 4720
3102#define DEF_STAT_INTERVAL 5.0074891 4721#define DEF_STAT_INTERVAL 5.0074891
3103#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4722#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3104#define MIN_STAT_INTERVAL 0.1074891 4723#define MIN_STAT_INTERVAL 0.1074891
3105 4724
3106static 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);
3107 4726
3108#if EV_USE_INOTIFY 4727#if EV_USE_INOTIFY
3109 4728
3110/* 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 */
3111# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4730# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3112 4731
3113static void noinline 4732ecb_noinline
4733static void
3114infy_add (EV_P_ ev_stat *w) 4734infy_add (EV_P_ ev_stat *w)
3115{ 4735{
3116 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);
3117 4740
3118 if (w->wd >= 0) 4741 if (w->wd >= 0)
3119 { 4742 {
3120 struct statfs sfs; 4743 struct statfs sfs;
3121 4744
… …
3125 4748
3126 if (!fs_2625) 4749 if (!fs_2625)
3127 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4750 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3128 else if (!statfs (w->path, &sfs) 4751 else if (!statfs (w->path, &sfs)
3129 && (sfs.f_type == 0x1373 /* devfs */ 4752 && (sfs.f_type == 0x1373 /* devfs */
4753 || sfs.f_type == 0x4006 /* fat */
4754 || sfs.f_type == 0x4d44 /* msdos */
3130 || 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 */
3131 || sfs.f_type == 0x3153464a /* jfs */ 4759 || sfs.f_type == 0x3153464a /* jfs */
4760 || sfs.f_type == 0x9123683e /* btrfs */
3132 || sfs.f_type == 0x52654973 /* reiser3 */ 4761 || sfs.f_type == 0x52654973 /* reiser3 */
3133 || sfs.f_type == 0x01021994 /* tempfs */ 4762 || sfs.f_type == 0x01021994 /* tmpfs */
3134 || sfs.f_type == 0x58465342 /* xfs */)) 4763 || sfs.f_type == 0x58465342 /* xfs */))
3135 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4764 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3136 else 4765 else
3137 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 */
3138 } 4767 }
… …
3173 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4802 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3174 ev_timer_again (EV_A_ &w->timer); 4803 ev_timer_again (EV_A_ &w->timer);
3175 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4804 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3176} 4805}
3177 4806
3178static void noinline 4807ecb_noinline
4808static void
3179infy_del (EV_P_ ev_stat *w) 4809infy_del (EV_P_ ev_stat *w)
3180{ 4810{
3181 int slot; 4811 int slot;
3182 int wd = w->wd; 4812 int wd = w->wd;
3183 4813
… …
3190 4820
3191 /* remove this watcher, if others are watching it, they will rearm */ 4821 /* remove this watcher, if others are watching it, they will rearm */
3192 inotify_rm_watch (fs_fd, wd); 4822 inotify_rm_watch (fs_fd, wd);
3193} 4823}
3194 4824
3195static void noinline 4825ecb_noinline
4826static void
3196infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4827infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3197{ 4828{
3198 if (slot < 0) 4829 if (slot < 0)
3199 /* overflow, need to check for all hash slots */ 4830 /* overflow, need to check for all hash slots */
3200 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4831 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3236 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4867 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3237 ofs += sizeof (struct inotify_event) + ev->len; 4868 ofs += sizeof (struct inotify_event) + ev->len;
3238 } 4869 }
3239} 4870}
3240 4871
3241inline_size void 4872inline_size ecb_cold
4873void
3242ev_check_2625 (EV_P) 4874ev_check_2625 (EV_P)
3243{ 4875{
3244 /* kernels < 2.6.25 are borked 4876 /* kernels < 2.6.25 are borked
3245 * 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
3246 */ 4878 */
… …
3251} 4883}
3252 4884
3253inline_size int 4885inline_size int
3254infy_newfd (void) 4886infy_newfd (void)
3255{ 4887{
3256#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4888#if defined IN_CLOEXEC && defined IN_NONBLOCK
3257 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4889 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3258 if (fd >= 0) 4890 if (fd >= 0)
3259 return fd; 4891 return fd;
3260#endif 4892#endif
3261 return inotify_init (); 4893 return inotify_init ();
… …
3336#else 4968#else
3337# define EV_LSTAT(p,b) lstat (p, b) 4969# define EV_LSTAT(p,b) lstat (p, b)
3338#endif 4970#endif
3339 4971
3340void 4972void
3341ev_stat_stat (EV_P_ ev_stat *w) 4973ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3342{ 4974{
3343 if (lstat (w->path, &w->attr) < 0) 4975 if (lstat (w->path, &w->attr) < 0)
3344 w->attr.st_nlink = 0; 4976 w->attr.st_nlink = 0;
3345 else if (!w->attr.st_nlink) 4977 else if (!w->attr.st_nlink)
3346 w->attr.st_nlink = 1; 4978 w->attr.st_nlink = 1;
3347} 4979}
3348 4980
3349static void noinline 4981ecb_noinline
4982static void
3350stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4983stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3351{ 4984{
3352 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4985 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3353 4986
3354 ev_statdata prev = w->attr; 4987 ev_statdata prev = w->attr;
… …
3385 ev_feed_event (EV_A_ w, EV_STAT); 5018 ev_feed_event (EV_A_ w, EV_STAT);
3386 } 5019 }
3387} 5020}
3388 5021
3389void 5022void
3390ev_stat_start (EV_P_ ev_stat *w) 5023ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3391{ 5024{
3392 if (expect_false (ev_is_active (w))) 5025 if (ecb_expect_false (ev_is_active (w)))
3393 return; 5026 return;
3394 5027
3395 ev_stat_stat (EV_A_ w); 5028 ev_stat_stat (EV_A_ w);
3396 5029
3397 if (w->interval < MIN_STAT_INTERVAL && w->interval) 5030 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3416 5049
3417 EV_FREQUENT_CHECK; 5050 EV_FREQUENT_CHECK;
3418} 5051}
3419 5052
3420void 5053void
3421ev_stat_stop (EV_P_ ev_stat *w) 5054ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3422{ 5055{
3423 clear_pending (EV_A_ (W)w); 5056 clear_pending (EV_A_ (W)w);
3424 if (expect_false (!ev_is_active (w))) 5057 if (ecb_expect_false (!ev_is_active (w)))
3425 return; 5058 return;
3426 5059
3427 EV_FREQUENT_CHECK; 5060 EV_FREQUENT_CHECK;
3428 5061
3429#if EV_USE_INOTIFY 5062#if EV_USE_INOTIFY
… …
3442} 5075}
3443#endif 5076#endif
3444 5077
3445#if EV_IDLE_ENABLE 5078#if EV_IDLE_ENABLE
3446void 5079void
3447ev_idle_start (EV_P_ ev_idle *w) 5080ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3448{ 5081{
3449 if (expect_false (ev_is_active (w))) 5082 if (ecb_expect_false (ev_is_active (w)))
3450 return; 5083 return;
3451 5084
3452 pri_adjust (EV_A_ (W)w); 5085 pri_adjust (EV_A_ (W)w);
3453 5086
3454 EV_FREQUENT_CHECK; 5087 EV_FREQUENT_CHECK;
… …
3457 int active = ++idlecnt [ABSPRI (w)]; 5090 int active = ++idlecnt [ABSPRI (w)];
3458 5091
3459 ++idleall; 5092 ++idleall;
3460 ev_start (EV_A_ (W)w, active); 5093 ev_start (EV_A_ (W)w, active);
3461 5094
3462 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);
3463 idles [ABSPRI (w)][active - 1] = w; 5096 idles [ABSPRI (w)][active - 1] = w;
3464 } 5097 }
3465 5098
3466 EV_FREQUENT_CHECK; 5099 EV_FREQUENT_CHECK;
3467} 5100}
3468 5101
3469void 5102void
3470ev_idle_stop (EV_P_ ev_idle *w) 5103ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3471{ 5104{
3472 clear_pending (EV_A_ (W)w); 5105 clear_pending (EV_A_ (W)w);
3473 if (expect_false (!ev_is_active (w))) 5106 if (ecb_expect_false (!ev_is_active (w)))
3474 return; 5107 return;
3475 5108
3476 EV_FREQUENT_CHECK; 5109 EV_FREQUENT_CHECK;
3477 5110
3478 { 5111 {
… …
3489} 5122}
3490#endif 5123#endif
3491 5124
3492#if EV_PREPARE_ENABLE 5125#if EV_PREPARE_ENABLE
3493void 5126void
3494ev_prepare_start (EV_P_ ev_prepare *w) 5127ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3495{ 5128{
3496 if (expect_false (ev_is_active (w))) 5129 if (ecb_expect_false (ev_is_active (w)))
3497 return; 5130 return;
3498 5131
3499 EV_FREQUENT_CHECK; 5132 EV_FREQUENT_CHECK;
3500 5133
3501 ev_start (EV_A_ (W)w, ++preparecnt); 5134 ev_start (EV_A_ (W)w, ++preparecnt);
3502 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 5135 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3503 prepares [preparecnt - 1] = w; 5136 prepares [preparecnt - 1] = w;
3504 5137
3505 EV_FREQUENT_CHECK; 5138 EV_FREQUENT_CHECK;
3506} 5139}
3507 5140
3508void 5141void
3509ev_prepare_stop (EV_P_ ev_prepare *w) 5142ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3510{ 5143{
3511 clear_pending (EV_A_ (W)w); 5144 clear_pending (EV_A_ (W)w);
3512 if (expect_false (!ev_is_active (w))) 5145 if (ecb_expect_false (!ev_is_active (w)))
3513 return; 5146 return;
3514 5147
3515 EV_FREQUENT_CHECK; 5148 EV_FREQUENT_CHECK;
3516 5149
3517 { 5150 {
… …
3527} 5160}
3528#endif 5161#endif
3529 5162
3530#if EV_CHECK_ENABLE 5163#if EV_CHECK_ENABLE
3531void 5164void
3532ev_check_start (EV_P_ ev_check *w) 5165ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3533{ 5166{
3534 if (expect_false (ev_is_active (w))) 5167 if (ecb_expect_false (ev_is_active (w)))
3535 return; 5168 return;
3536 5169
3537 EV_FREQUENT_CHECK; 5170 EV_FREQUENT_CHECK;
3538 5171
3539 ev_start (EV_A_ (W)w, ++checkcnt); 5172 ev_start (EV_A_ (W)w, ++checkcnt);
3540 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5173 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3541 checks [checkcnt - 1] = w; 5174 checks [checkcnt - 1] = w;
3542 5175
3543 EV_FREQUENT_CHECK; 5176 EV_FREQUENT_CHECK;
3544} 5177}
3545 5178
3546void 5179void
3547ev_check_stop (EV_P_ ev_check *w) 5180ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3548{ 5181{
3549 clear_pending (EV_A_ (W)w); 5182 clear_pending (EV_A_ (W)w);
3550 if (expect_false (!ev_is_active (w))) 5183 if (ecb_expect_false (!ev_is_active (w)))
3551 return; 5184 return;
3552 5185
3553 EV_FREQUENT_CHECK; 5186 EV_FREQUENT_CHECK;
3554 5187
3555 { 5188 {
… …
3564 EV_FREQUENT_CHECK; 5197 EV_FREQUENT_CHECK;
3565} 5198}
3566#endif 5199#endif
3567 5200
3568#if EV_EMBED_ENABLE 5201#if EV_EMBED_ENABLE
3569void noinline 5202ecb_noinline
5203void
3570ev_embed_sweep (EV_P_ ev_embed *w) 5204ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3571{ 5205{
3572 ev_run (w->other, EVRUN_NOWAIT); 5206 ev_run (w->other, EVRUN_NOWAIT);
3573} 5207}
3574 5208
3575static void 5209static void
… …
3597 ev_run (EV_A_ EVRUN_NOWAIT); 5231 ev_run (EV_A_ EVRUN_NOWAIT);
3598 } 5232 }
3599 } 5233 }
3600} 5234}
3601 5235
5236#if EV_FORK_ENABLE
3602static void 5237static void
3603embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5238embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3604{ 5239{
3605 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));
3606 5241
… …
3613 ev_run (EV_A_ EVRUN_NOWAIT); 5248 ev_run (EV_A_ EVRUN_NOWAIT);
3614 } 5249 }
3615 5250
3616 ev_embed_start (EV_A_ w); 5251 ev_embed_start (EV_A_ w);
3617} 5252}
5253#endif
3618 5254
3619#if 0 5255#if 0
3620static void 5256static void
3621embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5257embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3622{ 5258{
3623 ev_idle_stop (EV_A_ idle); 5259 ev_idle_stop (EV_A_ idle);
3624} 5260}
3625#endif 5261#endif
3626 5262
3627void 5263void
3628ev_embed_start (EV_P_ ev_embed *w) 5264ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3629{ 5265{
3630 if (expect_false (ev_is_active (w))) 5266 if (ecb_expect_false (ev_is_active (w)))
3631 return; 5267 return;
3632 5268
3633 { 5269 {
3634 EV_P = w->other; 5270 EV_P = w->other;
3635 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 ()));
… …
3643 5279
3644 ev_prepare_init (&w->prepare, embed_prepare_cb); 5280 ev_prepare_init (&w->prepare, embed_prepare_cb);
3645 ev_set_priority (&w->prepare, EV_MINPRI); 5281 ev_set_priority (&w->prepare, EV_MINPRI);
3646 ev_prepare_start (EV_A_ &w->prepare); 5282 ev_prepare_start (EV_A_ &w->prepare);
3647 5283
5284#if EV_FORK_ENABLE
3648 ev_fork_init (&w->fork, embed_fork_cb); 5285 ev_fork_init (&w->fork, embed_fork_cb);
3649 ev_fork_start (EV_A_ &w->fork); 5286 ev_fork_start (EV_A_ &w->fork);
5287#endif
3650 5288
3651 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5289 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3652 5290
3653 ev_start (EV_A_ (W)w, 1); 5291 ev_start (EV_A_ (W)w, 1);
3654 5292
3655 EV_FREQUENT_CHECK; 5293 EV_FREQUENT_CHECK;
3656} 5294}
3657 5295
3658void 5296void
3659ev_embed_stop (EV_P_ ev_embed *w) 5297ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3660{ 5298{
3661 clear_pending (EV_A_ (W)w); 5299 clear_pending (EV_A_ (W)w);
3662 if (expect_false (!ev_is_active (w))) 5300 if (ecb_expect_false (!ev_is_active (w)))
3663 return; 5301 return;
3664 5302
3665 EV_FREQUENT_CHECK; 5303 EV_FREQUENT_CHECK;
3666 5304
3667 ev_io_stop (EV_A_ &w->io); 5305 ev_io_stop (EV_A_ &w->io);
3668 ev_prepare_stop (EV_A_ &w->prepare); 5306 ev_prepare_stop (EV_A_ &w->prepare);
5307#if EV_FORK_ENABLE
3669 ev_fork_stop (EV_A_ &w->fork); 5308 ev_fork_stop (EV_A_ &w->fork);
5309#endif
3670 5310
3671 ev_stop (EV_A_ (W)w); 5311 ev_stop (EV_A_ (W)w);
3672 5312
3673 EV_FREQUENT_CHECK; 5313 EV_FREQUENT_CHECK;
3674} 5314}
3675#endif 5315#endif
3676 5316
3677#if EV_FORK_ENABLE 5317#if EV_FORK_ENABLE
3678void 5318void
3679ev_fork_start (EV_P_ ev_fork *w) 5319ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3680{ 5320{
3681 if (expect_false (ev_is_active (w))) 5321 if (ecb_expect_false (ev_is_active (w)))
3682 return; 5322 return;
3683 5323
3684 EV_FREQUENT_CHECK; 5324 EV_FREQUENT_CHECK;
3685 5325
3686 ev_start (EV_A_ (W)w, ++forkcnt); 5326 ev_start (EV_A_ (W)w, ++forkcnt);
3687 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5327 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3688 forks [forkcnt - 1] = w; 5328 forks [forkcnt - 1] = w;
3689 5329
3690 EV_FREQUENT_CHECK; 5330 EV_FREQUENT_CHECK;
3691} 5331}
3692 5332
3693void 5333void
3694ev_fork_stop (EV_P_ ev_fork *w) 5334ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3695{ 5335{
3696 clear_pending (EV_A_ (W)w); 5336 clear_pending (EV_A_ (W)w);
3697 if (expect_false (!ev_is_active (w))) 5337 if (ecb_expect_false (!ev_is_active (w)))
3698 return; 5338 return;
3699 5339
3700 EV_FREQUENT_CHECK; 5340 EV_FREQUENT_CHECK;
3701 5341
3702 { 5342 {
… …
3712} 5352}
3713#endif 5353#endif
3714 5354
3715#if EV_CLEANUP_ENABLE 5355#if EV_CLEANUP_ENABLE
3716void 5356void
3717ev_cleanup_start (EV_P_ ev_cleanup *w) 5357ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3718{ 5358{
3719 if (expect_false (ev_is_active (w))) 5359 if (ecb_expect_false (ev_is_active (w)))
3720 return; 5360 return;
3721 5361
3722 EV_FREQUENT_CHECK; 5362 EV_FREQUENT_CHECK;
3723 5363
3724 ev_start (EV_A_ (W)w, ++cleanupcnt); 5364 ev_start (EV_A_ (W)w, ++cleanupcnt);
3725 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); 5365 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3726 cleanups [cleanupcnt - 1] = w; 5366 cleanups [cleanupcnt - 1] = w;
3727 5367
3728 /* cleanup watchers should never keep a refcount on the loop */ 5368 /* cleanup watchers should never keep a refcount on the loop */
3729 ev_unref (EV_A); 5369 ev_unref (EV_A);
3730 EV_FREQUENT_CHECK; 5370 EV_FREQUENT_CHECK;
3731} 5371}
3732 5372
3733void 5373void
3734ev_cleanup_stop (EV_P_ ev_cleanup *w) 5374ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3735{ 5375{
3736 clear_pending (EV_A_ (W)w); 5376 clear_pending (EV_A_ (W)w);
3737 if (expect_false (!ev_is_active (w))) 5377 if (ecb_expect_false (!ev_is_active (w)))
3738 return; 5378 return;
3739 5379
3740 EV_FREQUENT_CHECK; 5380 EV_FREQUENT_CHECK;
3741 ev_ref (EV_A); 5381 ev_ref (EV_A);
3742 5382
… …
3753} 5393}
3754#endif 5394#endif
3755 5395
3756#if EV_ASYNC_ENABLE 5396#if EV_ASYNC_ENABLE
3757void 5397void
3758ev_async_start (EV_P_ ev_async *w) 5398ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3759{ 5399{
3760 if (expect_false (ev_is_active (w))) 5400 if (ecb_expect_false (ev_is_active (w)))
3761 return; 5401 return;
3762 5402
3763 w->sent = 0; 5403 w->sent = 0;
3764 5404
3765 evpipe_init (EV_A); 5405 evpipe_init (EV_A);
3766 5406
3767 EV_FREQUENT_CHECK; 5407 EV_FREQUENT_CHECK;
3768 5408
3769 ev_start (EV_A_ (W)w, ++asynccnt); 5409 ev_start (EV_A_ (W)w, ++asynccnt);
3770 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5410 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3771 asyncs [asynccnt - 1] = w; 5411 asyncs [asynccnt - 1] = w;
3772 5412
3773 EV_FREQUENT_CHECK; 5413 EV_FREQUENT_CHECK;
3774} 5414}
3775 5415
3776void 5416void
3777ev_async_stop (EV_P_ ev_async *w) 5417ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3778{ 5418{
3779 clear_pending (EV_A_ (W)w); 5419 clear_pending (EV_A_ (W)w);
3780 if (expect_false (!ev_is_active (w))) 5420 if (ecb_expect_false (!ev_is_active (w)))
3781 return; 5421 return;
3782 5422
3783 EV_FREQUENT_CHECK; 5423 EV_FREQUENT_CHECK;
3784 5424
3785 { 5425 {
… …
3793 5433
3794 EV_FREQUENT_CHECK; 5434 EV_FREQUENT_CHECK;
3795} 5435}
3796 5436
3797void 5437void
3798ev_async_send (EV_P_ ev_async *w) 5438ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3799{ 5439{
3800 w->sent = 1; 5440 w->sent = 1;
3801 evpipe_write (EV_A_ &async_pending); 5441 evpipe_write (EV_A_ &async_pending);
3802} 5442}
3803#endif 5443#endif
… …
3840 5480
3841 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));
3842} 5482}
3843 5483
3844void 5484void
3845ev_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
3846{ 5486{
3847 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));
3848
3849 if (expect_false (!once))
3850 {
3851 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3852 return;
3853 }
3854 5488
3855 once->cb = cb; 5489 once->cb = cb;
3856 once->arg = arg; 5490 once->arg = arg;
3857 5491
3858 ev_init (&once->io, once_cb_io); 5492 ev_init (&once->io, once_cb_io);
… …
3871} 5505}
3872 5506
3873/*****************************************************************************/ 5507/*****************************************************************************/
3874 5508
3875#if EV_WALK_ENABLE 5509#if EV_WALK_ENABLE
5510ecb_cold
3876void 5511void
3877ev_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
3878{ 5513{
3879 int i, j; 5514 int i, j;
3880 ev_watcher_list *wl, *wn; 5515 ev_watcher_list *wl, *wn;
3881 5516
3882 if (types & (EV_IO | EV_EMBED)) 5517 if (types & (EV_IO | EV_EMBED))
… …
3925 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5560 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3926#endif 5561#endif
3927 5562
3928#if EV_IDLE_ENABLE 5563#if EV_IDLE_ENABLE
3929 if (types & EV_IDLE) 5564 if (types & EV_IDLE)
3930 for (j = NUMPRI; i--; ) 5565 for (j = NUMPRI; j--; )
3931 for (i = idlecnt [j]; i--; ) 5566 for (i = idlecnt [j]; i--; )
3932 cb (EV_A_ EV_IDLE, idles [j][i]); 5567 cb (EV_A_ EV_IDLE, idles [j][i]);
3933#endif 5568#endif
3934 5569
3935#if EV_FORK_ENABLE 5570#if EV_FORK_ENABLE
… …
3988 5623
3989#if EV_MULTIPLICITY 5624#if EV_MULTIPLICITY
3990 #include "ev_wrap.h" 5625 #include "ev_wrap.h"
3991#endif 5626#endif
3992 5627
3993EV_CPP(})
3994

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