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Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.501 by root, Mon Jul 1 21:47:42 2019 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 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 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
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
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif 114# endif
109# else 115# else
110# undef EV_USE_EPOLL 116# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0 117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
112# endif 127# endif
113 128
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE 130# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
… …
156# define EV_USE_EVENTFD 0 171# define EV_USE_EVENTFD 0
157# endif 172# endif
158 173
159#endif 174#endif
160 175
161#include <math.h> 176/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were
179 * ordered to have a vacuum, or they do anything for money.
180 * This might help. Or not.
181 * Note that this must be defined early, as other include files
182 * will rely on this define as well.
183 */
184#define _DARWIN_UNLIMITED_SELECT 1
185
162#include <stdlib.h> 186#include <stdlib.h>
163#include <string.h> 187#include <string.h>
164#include <fcntl.h> 188#include <fcntl.h>
165#include <stddef.h> 189#include <stddef.h>
166 190
… …
178# include EV_H 202# include EV_H
179#else 203#else
180# include "ev.h" 204# include "ev.h"
181#endif 205#endif
182 206
183EV_CPP(extern "C" {) 207#if EV_NO_THREADS
208# undef EV_NO_SMP
209# define EV_NO_SMP 1
210# undef ECB_NO_THREADS
211# define ECB_NO_THREADS 1
212#endif
213#if EV_NO_SMP
214# undef EV_NO_SMP
215# define ECB_NO_SMP 1
216#endif
184 217
185#ifndef _WIN32 218#ifndef _WIN32
186# include <sys/time.h> 219# include <sys/time.h>
187# include <sys/wait.h> 220# include <sys/wait.h>
188# include <unistd.h> 221# include <unistd.h>
189#else 222#else
190# include <io.h> 223# include <io.h>
191# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
192# include <windows.h> 226# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
195# endif 229# endif
196# undef EV_AVOID_STDIO 230# undef EV_AVOID_STDIO
197#endif 231#endif
198 232
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 233/* this block tries to deduce configuration from header-defined symbols and defaults */
208 234
209/* try to deduce the maximum number of signals on this platform */ 235/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 236#if defined EV_NSIG
211/* use what's provided */ 237/* use what's provided */
212#elif defined (NSIG) 238#elif defined NSIG
213# define EV_NSIG (NSIG) 239# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 240#elif defined _NSIG
215# define EV_NSIG (_NSIG) 241# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 242#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 243# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 244#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 245# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 246#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 247# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 248#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 249# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 250#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 251# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 252#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 253# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 254#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 255# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 256#else
231# error "unable to find value for NSIG, please report" 257# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 258#endif
233/* but consider reporting it, too! :) */ 259
234# define EV_NSIG 65 260#ifndef EV_USE_FLOOR
261# define EV_USE_FLOOR 0
235#endif 262#endif
236 263
237#ifndef EV_USE_CLOCK_SYSCALL 264#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 265# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 266# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 267# else
241# define EV_USE_CLOCK_SYSCALL 0 268# define EV_USE_CLOCK_SYSCALL 0
242# endif 269# endif
243#endif 270#endif
244 271
272#if !(_POSIX_TIMERS > 0)
273# ifndef EV_USE_MONOTONIC
274# define EV_USE_MONOTONIC 0
275# endif
276# ifndef EV_USE_REALTIME
277# define EV_USE_REALTIME 0
278# endif
279#endif
280
245#ifndef EV_USE_MONOTONIC 281#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 282# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 283# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 284# else
249# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
250# endif 286# endif
251#endif 287#endif
… …
288 324
289#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
290# define EV_USE_PORT 0 326# define EV_USE_PORT 0
291#endif 327#endif
292 328
329#ifndef EV_USE_LINUXAIO
330# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
331# define EV_USE_LINUXAIO 1
332# else
333# define EV_USE_LINUXAIO 0
334# endif
335#endif
336
337#ifndef EV_USE_IOURING
338# if __linux
339# define EV_USE_IOURING 0
340# else
341# define EV_USE_IOURING 0
342# endif
343#endif
344
293#ifndef EV_USE_INOTIFY 345#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 346# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS 347# define EV_USE_INOTIFY EV_FEATURE_OS
296# else 348# else
297# define EV_USE_INOTIFY 0 349# define EV_USE_INOTIFY 0
… …
338 390
339#ifndef EV_HEAP_CACHE_AT 391#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 392# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 393#endif
342 394
395#ifdef __ANDROID__
396/* supposedly, android doesn't typedef fd_mask */
397# undef EV_USE_SELECT
398# define EV_USE_SELECT 0
399/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
400# undef EV_USE_CLOCK_SYSCALL
401# define EV_USE_CLOCK_SYSCALL 0
402#endif
403
404/* aix's poll.h seems to cause lots of trouble */
405#ifdef _AIX
406/* AIX has a completely broken poll.h header */
407# undef EV_USE_POLL
408# define EV_USE_POLL 0
409#endif
410
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 411/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 412/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 413#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 414# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 415# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 416# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 417# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 418# define EV_USE_MONOTONIC 1
419# define EV_NEED_SYSCALL 1
351# else 420# else
352# undef EV_USE_CLOCK_SYSCALL 421# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0 422# define EV_USE_CLOCK_SYSCALL 0
354# endif 423# endif
355#endif 424#endif
356 425
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 426/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 427
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 428#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 429# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 430# define EV_USE_MONOTONIC 0
368#endif 431#endif
369 432
… …
376# undef EV_USE_INOTIFY 439# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 440# define EV_USE_INOTIFY 0
378#endif 441#endif
379 442
380#if !EV_USE_NANOSLEEP 443#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 444/* hp-ux has it in sys/time.h, which we unconditionally include above */
445# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 446# include <sys/select.h>
383# endif 447# endif
384#endif 448#endif
385 449
450#if EV_USE_LINUXAIO
451# include <sys/syscall.h>
452# if !SYS_io_getevents || !EV_USE_EPOLL /* ev_linxaio uses ev_poll.c:ev_epoll_create */
453# undef EV_USE_LINUXAIO
454# define EV_USE_LINUXAIO 0
455# else
456# define EV_NEED_SYSCALL 1
457# endif
458#endif
459
460#if EV_USE_IOURING
461# include <sys/syscall.h>
462# if !__alpha && !SYS_io_uring_setup
463# define SYS_io_uring_setup 425
464# define SYS_io_uring_enter 426
465# define SYS_io_uring_wregister 427
466# endif
467# if SYS_io_uring_setup
468# define EV_NEED_SYSCALL 1
469# else
470# undef EV_USE_IOURING
471# define EV_USE_IOURING 0
472# endif
473#endif
474
386#if EV_USE_INOTIFY 475#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 476# include <sys/statfs.h>
389# include <sys/inotify.h> 477# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 478/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 479# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 480# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 481# define EV_USE_INOTIFY 0
394# endif 482# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 483#endif
400 484
401#if EV_USE_EVENTFD 485#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 486/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 487# include <stdint.h>
… …
434 uint32_t ssi_signo; 518 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)]; 519 char pad[128 - sizeof (uint32_t)];
436}; 520};
437#endif 521#endif
438 522
439/**/ 523/*****************************************************************************/
524
525#if EV_NEED_SYSCALL
526
527#include <sys/syscall.h>
528
529/*
530 * define some syscall wrappers for common architectures
531 * this is mostly for nice looks during debugging, not performance.
532 * our syscalls return < 0, not == -1, on error. which is good
533 * enough for linux aio.
534 * TODO: arm is also common nowadays, maybe even mips and x86
535 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
536 */
537#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__
538 /* the costly errno access probably kills this for size optimisation */
539
540 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5) \
541 ({ \
542 long res; \
543 register unsigned long r5 __asm__ ("r8" ); \
544 register unsigned long r4 __asm__ ("r10"); \
545 register unsigned long r3 __asm__ ("rdx"); \
546 register unsigned long r2 __asm__ ("rsi"); \
547 register unsigned long r1 __asm__ ("rdi"); \
548 if (narg >= 5) r5 = (unsigned long)(arg5); \
549 if (narg >= 4) r4 = (unsigned long)(arg4); \
550 if (narg >= 3) r3 = (unsigned long)(arg3); \
551 if (narg >= 2) r2 = (unsigned long)(arg2); \
552 if (narg >= 1) r1 = (unsigned long)(arg1); \
553 __asm__ __volatile__ ( \
554 "syscall\n\t" \
555 : "=a" (res) \
556 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
557 : "cc", "r11", "cx", "memory"); \
558 errno = -res; \
559 res; \
560 })
561
562#endif
563
564#ifdef ev_syscall
565 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0
566 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0)
567 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0)
568 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0)
569 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0)
570 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5)
571#else
572 #define ev_syscall0(nr) syscall (nr)
573 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
574 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
575 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
576 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
577 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
578#endif
579
580#endif
581
582/*****************************************************************************/
440 583
441#if EV_VERIFY >= 3 584#if EV_VERIFY >= 3
442# define EV_FREQUENT_CHECK ev_verify (EV_A) 585# define EV_FREQUENT_CHECK ev_verify (EV_A)
443#else 586#else
444# define EV_FREQUENT_CHECK do { } while (0) 587# define EV_FREQUENT_CHECK do { } while (0)
445#endif 588#endif
446 589
447/* 590/*
448 * This is used to avoid floating point rounding problems. 591 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 592 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 593 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 594#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
595/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 596
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 597#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 598#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 599
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 600#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 601#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 602
603/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
604/* ECB.H BEGIN */
605/*
606 * libecb - http://software.schmorp.de/pkg/libecb
607 *
608 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
609 * Copyright (©) 2011 Emanuele Giaquinta
610 * All rights reserved.
611 *
612 * Redistribution and use in source and binary forms, with or without modifica-
613 * tion, are permitted provided that the following conditions are met:
614 *
615 * 1. Redistributions of source code must retain the above copyright notice,
616 * this list of conditions and the following disclaimer.
617 *
618 * 2. Redistributions in binary form must reproduce the above copyright
619 * notice, this list of conditions and the following disclaimer in the
620 * documentation and/or other materials provided with the distribution.
621 *
622 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
623 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
624 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
625 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
626 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
627 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
628 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
629 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
630 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
631 * OF THE POSSIBILITY OF SUCH DAMAGE.
632 *
633 * Alternatively, the contents of this file may be used under the terms of
634 * the GNU General Public License ("GPL") version 2 or any later version,
635 * in which case the provisions of the GPL are applicable instead of
636 * the above. If you wish to allow the use of your version of this file
637 * only under the terms of the GPL and not to allow others to use your
638 * version of this file under the BSD license, indicate your decision
639 * by deleting the provisions above and replace them with the notice
640 * and other provisions required by the GPL. If you do not delete the
641 * provisions above, a recipient may use your version of this file under
642 * either the BSD or the GPL.
643 */
644
645#ifndef ECB_H
646#define ECB_H
647
648/* 16 bits major, 16 bits minor */
649#define ECB_VERSION 0x00010006
650
651#ifdef _WIN32
652 typedef signed char int8_t;
653 typedef unsigned char uint8_t;
654 typedef signed short int16_t;
655 typedef unsigned short uint16_t;
656 typedef signed int int32_t;
657 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 658 #if __GNUC__
659 typedef signed long long int64_t;
660 typedef unsigned long long uint64_t;
661 #else /* _MSC_VER || __BORLANDC__ */
662 typedef signed __int64 int64_t;
663 typedef unsigned __int64 uint64_t;
664 #endif
665 #ifdef _WIN64
666 #define ECB_PTRSIZE 8
667 typedef uint64_t uintptr_t;
668 typedef int64_t intptr_t;
669 #else
670 #define ECB_PTRSIZE 4
671 typedef uint32_t uintptr_t;
672 typedef int32_t intptr_t;
673 #endif
674#else
675 #include <inttypes.h>
676 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
677 #define ECB_PTRSIZE 8
678 #else
679 #define ECB_PTRSIZE 4
680 #endif
681#endif
682
683#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
684#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
685
686/* work around x32 idiocy by defining proper macros */
687#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
688 #if _ILP32
689 #define ECB_AMD64_X32 1
690 #else
691 #define ECB_AMD64 1
692 #endif
693#endif
694
695/* many compilers define _GNUC_ to some versions but then only implement
696 * what their idiot authors think are the "more important" extensions,
697 * causing enormous grief in return for some better fake benchmark numbers.
698 * or so.
699 * we try to detect these and simply assume they are not gcc - if they have
700 * an issue with that they should have done it right in the first place.
701 */
702#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
703 #define ECB_GCC_VERSION(major,minor) 0
704#else
705 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
706#endif
707
708#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
709
710#if __clang__ && defined __has_builtin
711 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
712#else
713 #define ECB_CLANG_BUILTIN(x) 0
714#endif
715
716#if __clang__ && defined __has_extension
717 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
718#else
719 #define ECB_CLANG_EXTENSION(x) 0
720#endif
721
722#define ECB_CPP (__cplusplus+0)
723#define ECB_CPP11 (__cplusplus >= 201103L)
724#define ECB_CPP14 (__cplusplus >= 201402L)
725#define ECB_CPP17 (__cplusplus >= 201703L)
726
727#if ECB_CPP
728 #define ECB_C 0
729 #define ECB_STDC_VERSION 0
730#else
731 #define ECB_C 1
732 #define ECB_STDC_VERSION __STDC_VERSION__
733#endif
734
735#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
736#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
737#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
738
739#if ECB_CPP
740 #define ECB_EXTERN_C extern "C"
741 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
742 #define ECB_EXTERN_C_END }
743#else
744 #define ECB_EXTERN_C extern
745 #define ECB_EXTERN_C_BEG
746 #define ECB_EXTERN_C_END
747#endif
748
749/*****************************************************************************/
750
751/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
752/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
753
754#if ECB_NO_THREADS
755 #define ECB_NO_SMP 1
756#endif
757
758#if ECB_NO_SMP
759 #define ECB_MEMORY_FENCE do { } while (0)
760#endif
761
762/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
763#if __xlC__ && ECB_CPP
764 #include <builtins.h>
765#endif
766
767#if 1400 <= _MSC_VER
768 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
769#endif
770
771#ifndef ECB_MEMORY_FENCE
772 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
773 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
774 #if __i386 || __i386__
775 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
776 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
777 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
778 #elif ECB_GCC_AMD64
779 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
780 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
781 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
782 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
783 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
784 #elif defined __ARM_ARCH_2__ \
785 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
786 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
787 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
788 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
789 || defined __ARM_ARCH_5TEJ__
790 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
791 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
792 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
793 || defined __ARM_ARCH_6T2__
794 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
795 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
796 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
797 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
798 #elif __aarch64__
799 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
800 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
801 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
802 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
803 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
804 #elif defined __s390__ || defined __s390x__
805 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
806 #elif defined __mips__
807 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
808 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
809 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
810 #elif defined __alpha__
811 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
812 #elif defined __hppa__
813 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
814 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
815 #elif defined __ia64__
816 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
817 #elif defined __m68k__
818 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
819 #elif defined __m88k__
820 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
821 #elif defined __sh__
822 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
823 #endif
824 #endif
825#endif
826
827#ifndef ECB_MEMORY_FENCE
828 #if ECB_GCC_VERSION(4,7)
829 /* see comment below (stdatomic.h) about the C11 memory model. */
830 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
831 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
832 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
833 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
834
835 #elif ECB_CLANG_EXTENSION(c_atomic)
836 /* see comment below (stdatomic.h) about the C11 memory model. */
837 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
838 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
839 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
840 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
841
842 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
843 #define ECB_MEMORY_FENCE __sync_synchronize ()
844 #elif _MSC_VER >= 1500 /* VC++ 2008 */
845 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
846 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
847 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
848 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
849 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
850 #elif _MSC_VER >= 1400 /* VC++ 2005 */
851 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
852 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
853 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
854 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
855 #elif defined _WIN32
856 #include <WinNT.h>
857 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
858 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
859 #include <mbarrier.h>
860 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
861 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
862 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
863 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
864 #elif __xlC__
865 #define ECB_MEMORY_FENCE __sync ()
866 #endif
867#endif
868
869#ifndef ECB_MEMORY_FENCE
870 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
871 /* we assume that these memory fences work on all variables/all memory accesses, */
872 /* not just C11 atomics and atomic accesses */
873 #include <stdatomic.h>
874 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
875 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
876 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
877 #endif
878#endif
879
880#ifndef ECB_MEMORY_FENCE
881 #if !ECB_AVOID_PTHREADS
882 /*
883 * if you get undefined symbol references to pthread_mutex_lock,
884 * or failure to find pthread.h, then you should implement
885 * the ECB_MEMORY_FENCE operations for your cpu/compiler
886 * OR provide pthread.h and link against the posix thread library
887 * of your system.
888 */
889 #include <pthread.h>
890 #define ECB_NEEDS_PTHREADS 1
891 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
892
893 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
894 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
895 #endif
896#endif
897
898#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
899 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
900#endif
901
902#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
903 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
904#endif
905
906#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
907 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
908#endif
909
910/*****************************************************************************/
911
912#if ECB_CPP
913 #define ecb_inline static inline
914#elif ECB_GCC_VERSION(2,5)
915 #define ecb_inline static __inline__
916#elif ECB_C99
917 #define ecb_inline static inline
918#else
919 #define ecb_inline static
920#endif
921
922#if ECB_GCC_VERSION(3,3)
923 #define ecb_restrict __restrict__
924#elif ECB_C99
925 #define ecb_restrict restrict
926#else
927 #define ecb_restrict
928#endif
929
930typedef int ecb_bool;
931
932#define ECB_CONCAT_(a, b) a ## b
933#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
934#define ECB_STRINGIFY_(a) # a
935#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
936#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
937
938#define ecb_function_ ecb_inline
939
940#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
941 #define ecb_attribute(attrlist) __attribute__ (attrlist)
942#else
943 #define ecb_attribute(attrlist)
944#endif
945
946#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
947 #define ecb_is_constant(expr) __builtin_constant_p (expr)
948#else
949 /* possible C11 impl for integral types
950 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
951 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
952
953 #define ecb_is_constant(expr) 0
954#endif
955
956#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
464# define expect(expr,value) __builtin_expect ((expr),(value)) 957 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else 958#else
467# define expect(expr,value) (expr) 959 #define ecb_expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 960#endif
472#endif
473 961
962#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
963 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
964#else
965 #define ecb_prefetch(addr,rw,locality)
966#endif
967
968/* no emulation for ecb_decltype */
969#if ECB_CPP11
970 // older implementations might have problems with decltype(x)::type, work around it
971 template<class T> struct ecb_decltype_t { typedef T type; };
972 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
973#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
974 #define ecb_decltype(x) __typeof__ (x)
975#endif
976
977#if _MSC_VER >= 1300
978 #define ecb_deprecated __declspec (deprecated)
979#else
980 #define ecb_deprecated ecb_attribute ((__deprecated__))
981#endif
982
983#if _MSC_VER >= 1500
984 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
985#elif ECB_GCC_VERSION(4,5)
986 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
987#else
988 #define ecb_deprecated_message(msg) ecb_deprecated
989#endif
990
991#if _MSC_VER >= 1400
992 #define ecb_noinline __declspec (noinline)
993#else
994 #define ecb_noinline ecb_attribute ((__noinline__))
995#endif
996
997#define ecb_unused ecb_attribute ((__unused__))
998#define ecb_const ecb_attribute ((__const__))
999#define ecb_pure ecb_attribute ((__pure__))
1000
1001#if ECB_C11 || __IBMC_NORETURN
1002 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
1003 #define ecb_noreturn _Noreturn
1004#elif ECB_CPP11
1005 #define ecb_noreturn [[noreturn]]
1006#elif _MSC_VER >= 1200
1007 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
1008 #define ecb_noreturn __declspec (noreturn)
1009#else
1010 #define ecb_noreturn ecb_attribute ((__noreturn__))
1011#endif
1012
1013#if ECB_GCC_VERSION(4,3)
1014 #define ecb_artificial ecb_attribute ((__artificial__))
1015 #define ecb_hot ecb_attribute ((__hot__))
1016 #define ecb_cold ecb_attribute ((__cold__))
1017#else
1018 #define ecb_artificial
1019 #define ecb_hot
1020 #define ecb_cold
1021#endif
1022
1023/* put around conditional expressions if you are very sure that the */
1024/* expression is mostly true or mostly false. note that these return */
1025/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 1026#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 1027#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
1028/* for compatibility to the rest of the world */
1029#define ecb_likely(expr) ecb_expect_true (expr)
1030#define ecb_unlikely(expr) ecb_expect_false (expr)
1031
1032/* count trailing zero bits and count # of one bits */
1033#if ECB_GCC_VERSION(3,4) \
1034 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1035 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1036 && ECB_CLANG_BUILTIN(__builtin_popcount))
1037 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1038 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1039 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1040 #define ecb_ctz32(x) __builtin_ctz (x)
1041 #define ecb_ctz64(x) __builtin_ctzll (x)
1042 #define ecb_popcount32(x) __builtin_popcount (x)
1043 /* no popcountll */
1044#else
1045 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1046 ecb_function_ ecb_const int
1047 ecb_ctz32 (uint32_t x)
1048 {
1049#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1050 unsigned long r;
1051 _BitScanForward (&r, x);
1052 return (int)r;
1053#else
1054 int r = 0;
1055
1056 x &= ~x + 1; /* this isolates the lowest bit */
1057
1058#if ECB_branchless_on_i386
1059 r += !!(x & 0xaaaaaaaa) << 0;
1060 r += !!(x & 0xcccccccc) << 1;
1061 r += !!(x & 0xf0f0f0f0) << 2;
1062 r += !!(x & 0xff00ff00) << 3;
1063 r += !!(x & 0xffff0000) << 4;
1064#else
1065 if (x & 0xaaaaaaaa) r += 1;
1066 if (x & 0xcccccccc) r += 2;
1067 if (x & 0xf0f0f0f0) r += 4;
1068 if (x & 0xff00ff00) r += 8;
1069 if (x & 0xffff0000) r += 16;
1070#endif
1071
1072 return r;
1073#endif
1074 }
1075
1076 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1077 ecb_function_ ecb_const int
1078 ecb_ctz64 (uint64_t x)
1079 {
1080#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1081 unsigned long r;
1082 _BitScanForward64 (&r, x);
1083 return (int)r;
1084#else
1085 int shift = x & 0xffffffff ? 0 : 32;
1086 return ecb_ctz32 (x >> shift) + shift;
1087#endif
1088 }
1089
1090 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1091 ecb_function_ ecb_const int
1092 ecb_popcount32 (uint32_t x)
1093 {
1094 x -= (x >> 1) & 0x55555555;
1095 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1096 x = ((x >> 4) + x) & 0x0f0f0f0f;
1097 x *= 0x01010101;
1098
1099 return x >> 24;
1100 }
1101
1102 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1103 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1104 {
1105#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1106 unsigned long r;
1107 _BitScanReverse (&r, x);
1108 return (int)r;
1109#else
1110 int r = 0;
1111
1112 if (x >> 16) { x >>= 16; r += 16; }
1113 if (x >> 8) { x >>= 8; r += 8; }
1114 if (x >> 4) { x >>= 4; r += 4; }
1115 if (x >> 2) { x >>= 2; r += 2; }
1116 if (x >> 1) { r += 1; }
1117
1118 return r;
1119#endif
1120 }
1121
1122 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1123 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1124 {
1125#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1126 unsigned long r;
1127 _BitScanReverse64 (&r, x);
1128 return (int)r;
1129#else
1130 int r = 0;
1131
1132 if (x >> 32) { x >>= 32; r += 32; }
1133
1134 return r + ecb_ld32 (x);
1135#endif
1136 }
1137#endif
1138
1139ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1140ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1141ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1142ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1143
1144ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1145ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1146{
1147 return ( (x * 0x0802U & 0x22110U)
1148 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1149}
1150
1151ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1152ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1153{
1154 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1155 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1156 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1157 x = ( x >> 8 ) | ( x << 8);
1158
1159 return x;
1160}
1161
1162ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1163ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1164{
1165 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1166 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1167 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1168 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1169 x = ( x >> 16 ) | ( x << 16);
1170
1171 return x;
1172}
1173
1174/* popcount64 is only available on 64 bit cpus as gcc builtin */
1175/* so for this version we are lazy */
1176ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1177ecb_function_ ecb_const int
1178ecb_popcount64 (uint64_t x)
1179{
1180 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1181}
1182
1183ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1184ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1185ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1186ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1187ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1188ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1189ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1190ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1191
1192ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1193ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1194ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1195ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1196ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1197ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1198ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1199ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1200
1201#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1202 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1203 #define ecb_bswap16(x) __builtin_bswap16 (x)
1204 #else
1205 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1206 #endif
1207 #define ecb_bswap32(x) __builtin_bswap32 (x)
1208 #define ecb_bswap64(x) __builtin_bswap64 (x)
1209#elif _MSC_VER
1210 #include <stdlib.h>
1211 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1212 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1213 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1214#else
1215 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1216 ecb_function_ ecb_const uint16_t
1217 ecb_bswap16 (uint16_t x)
1218 {
1219 return ecb_rotl16 (x, 8);
1220 }
1221
1222 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1223 ecb_function_ ecb_const uint32_t
1224 ecb_bswap32 (uint32_t x)
1225 {
1226 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1227 }
1228
1229 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1230 ecb_function_ ecb_const uint64_t
1231 ecb_bswap64 (uint64_t x)
1232 {
1233 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1234 }
1235#endif
1236
1237#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1238 #define ecb_unreachable() __builtin_unreachable ()
1239#else
1240 /* this seems to work fine, but gcc always emits a warning for it :/ */
1241 ecb_inline ecb_noreturn void ecb_unreachable (void);
1242 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1243#endif
1244
1245/* try to tell the compiler that some condition is definitely true */
1246#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1247
1248ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1249ecb_inline ecb_const uint32_t
1250ecb_byteorder_helper (void)
1251{
1252 /* the union code still generates code under pressure in gcc, */
1253 /* but less than using pointers, and always seems to */
1254 /* successfully return a constant. */
1255 /* the reason why we have this horrible preprocessor mess */
1256 /* is to avoid it in all cases, at least on common architectures */
1257 /* or when using a recent enough gcc version (>= 4.6) */
1258#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1259 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1260 #define ECB_LITTLE_ENDIAN 1
1261 return 0x44332211;
1262#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1263 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1264 #define ECB_BIG_ENDIAN 1
1265 return 0x11223344;
1266#else
1267 union
1268 {
1269 uint8_t c[4];
1270 uint32_t u;
1271 } u = { 0x11, 0x22, 0x33, 0x44 };
1272 return u.u;
1273#endif
1274}
1275
1276ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1277ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1278ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1279ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1280
1281#if ECB_GCC_VERSION(3,0) || ECB_C99
1282 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1283#else
1284 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1285#endif
1286
1287#if ECB_CPP
1288 template<typename T>
1289 static inline T ecb_div_rd (T val, T div)
1290 {
1291 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1292 }
1293 template<typename T>
1294 static inline T ecb_div_ru (T val, T div)
1295 {
1296 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1297 }
1298#else
1299 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1300 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1301#endif
1302
1303#if ecb_cplusplus_does_not_suck
1304 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1305 template<typename T, int N>
1306 static inline int ecb_array_length (const T (&arr)[N])
1307 {
1308 return N;
1309 }
1310#else
1311 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1312#endif
1313
1314ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1315ecb_function_ ecb_const uint32_t
1316ecb_binary16_to_binary32 (uint32_t x)
1317{
1318 unsigned int s = (x & 0x8000) << (31 - 15);
1319 int e = (x >> 10) & 0x001f;
1320 unsigned int m = x & 0x03ff;
1321
1322 if (ecb_expect_false (e == 31))
1323 /* infinity or NaN */
1324 e = 255 - (127 - 15);
1325 else if (ecb_expect_false (!e))
1326 {
1327 if (ecb_expect_true (!m))
1328 /* zero, handled by code below by forcing e to 0 */
1329 e = 0 - (127 - 15);
1330 else
1331 {
1332 /* subnormal, renormalise */
1333 unsigned int s = 10 - ecb_ld32 (m);
1334
1335 m = (m << s) & 0x3ff; /* mask implicit bit */
1336 e -= s - 1;
1337 }
1338 }
1339
1340 /* e and m now are normalised, or zero, (or inf or nan) */
1341 e += 127 - 15;
1342
1343 return s | (e << 23) | (m << (23 - 10));
1344}
1345
1346ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1347ecb_function_ ecb_const uint16_t
1348ecb_binary32_to_binary16 (uint32_t x)
1349{
1350 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1351 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1352 unsigned int m = x & 0x007fffff;
1353
1354 x &= 0x7fffffff;
1355
1356 /* if it's within range of binary16 normals, use fast path */
1357 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1358 {
1359 /* mantissa round-to-even */
1360 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1361
1362 /* handle overflow */
1363 if (ecb_expect_false (m >= 0x00800000))
1364 {
1365 m >>= 1;
1366 e += 1;
1367 }
1368
1369 return s | (e << 10) | (m >> (23 - 10));
1370 }
1371
1372 /* handle large numbers and infinity */
1373 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1374 return s | 0x7c00;
1375
1376 /* handle zero, subnormals and small numbers */
1377 if (ecb_expect_true (x < 0x38800000))
1378 {
1379 /* zero */
1380 if (ecb_expect_true (!x))
1381 return s;
1382
1383 /* handle subnormals */
1384
1385 /* too small, will be zero */
1386 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1387 return s;
1388
1389 m |= 0x00800000; /* make implicit bit explicit */
1390
1391 /* very tricky - we need to round to the nearest e (+10) bit value */
1392 {
1393 unsigned int bits = 14 - e;
1394 unsigned int half = (1 << (bits - 1)) - 1;
1395 unsigned int even = (m >> bits) & 1;
1396
1397 /* if this overflows, we will end up with a normalised number */
1398 m = (m + half + even) >> bits;
1399 }
1400
1401 return s | m;
1402 }
1403
1404 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1405 m >>= 13;
1406
1407 return s | 0x7c00 | m | !m;
1408}
1409
1410/*******************************************************************************/
1411/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1412
1413/* basically, everything uses "ieee pure-endian" floating point numbers */
1414/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1415#if 0 \
1416 || __i386 || __i386__ \
1417 || ECB_GCC_AMD64 \
1418 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1419 || defined __s390__ || defined __s390x__ \
1420 || defined __mips__ \
1421 || defined __alpha__ \
1422 || defined __hppa__ \
1423 || defined __ia64__ \
1424 || defined __m68k__ \
1425 || defined __m88k__ \
1426 || defined __sh__ \
1427 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1428 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1429 || defined __aarch64__
1430 #define ECB_STDFP 1
1431 #include <string.h> /* for memcpy */
1432#else
1433 #define ECB_STDFP 0
1434#endif
1435
1436#ifndef ECB_NO_LIBM
1437
1438 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1439
1440 /* only the oldest of old doesn't have this one. solaris. */
1441 #ifdef INFINITY
1442 #define ECB_INFINITY INFINITY
1443 #else
1444 #define ECB_INFINITY HUGE_VAL
1445 #endif
1446
1447 #ifdef NAN
1448 #define ECB_NAN NAN
1449 #else
1450 #define ECB_NAN ECB_INFINITY
1451 #endif
1452
1453 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1454 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1455 #define ecb_frexpf(x,e) frexpf ((x), (e))
1456 #else
1457 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1458 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1459 #endif
1460
1461 /* convert a float to ieee single/binary32 */
1462 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1463 ecb_function_ ecb_const uint32_t
1464 ecb_float_to_binary32 (float x)
1465 {
1466 uint32_t r;
1467
1468 #if ECB_STDFP
1469 memcpy (&r, &x, 4);
1470 #else
1471 /* slow emulation, works for anything but -0 */
1472 uint32_t m;
1473 int e;
1474
1475 if (x == 0e0f ) return 0x00000000U;
1476 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1477 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1478 if (x != x ) return 0x7fbfffffU;
1479
1480 m = ecb_frexpf (x, &e) * 0x1000000U;
1481
1482 r = m & 0x80000000U;
1483
1484 if (r)
1485 m = -m;
1486
1487 if (e <= -126)
1488 {
1489 m &= 0xffffffU;
1490 m >>= (-125 - e);
1491 e = -126;
1492 }
1493
1494 r |= (e + 126) << 23;
1495 r |= m & 0x7fffffU;
1496 #endif
1497
1498 return r;
1499 }
1500
1501 /* converts an ieee single/binary32 to a float */
1502 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1503 ecb_function_ ecb_const float
1504 ecb_binary32_to_float (uint32_t x)
1505 {
1506 float r;
1507
1508 #if ECB_STDFP
1509 memcpy (&r, &x, 4);
1510 #else
1511 /* emulation, only works for normals and subnormals and +0 */
1512 int neg = x >> 31;
1513 int e = (x >> 23) & 0xffU;
1514
1515 x &= 0x7fffffU;
1516
1517 if (e)
1518 x |= 0x800000U;
1519 else
1520 e = 1;
1521
1522 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1523 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1524
1525 r = neg ? -r : r;
1526 #endif
1527
1528 return r;
1529 }
1530
1531 /* convert a double to ieee double/binary64 */
1532 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1533 ecb_function_ ecb_const uint64_t
1534 ecb_double_to_binary64 (double x)
1535 {
1536 uint64_t r;
1537
1538 #if ECB_STDFP
1539 memcpy (&r, &x, 8);
1540 #else
1541 /* slow emulation, works for anything but -0 */
1542 uint64_t m;
1543 int e;
1544
1545 if (x == 0e0 ) return 0x0000000000000000U;
1546 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1547 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1548 if (x != x ) return 0X7ff7ffffffffffffU;
1549
1550 m = frexp (x, &e) * 0x20000000000000U;
1551
1552 r = m & 0x8000000000000000;;
1553
1554 if (r)
1555 m = -m;
1556
1557 if (e <= -1022)
1558 {
1559 m &= 0x1fffffffffffffU;
1560 m >>= (-1021 - e);
1561 e = -1022;
1562 }
1563
1564 r |= ((uint64_t)(e + 1022)) << 52;
1565 r |= m & 0xfffffffffffffU;
1566 #endif
1567
1568 return r;
1569 }
1570
1571 /* converts an ieee double/binary64 to a double */
1572 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1573 ecb_function_ ecb_const double
1574 ecb_binary64_to_double (uint64_t x)
1575 {
1576 double r;
1577
1578 #if ECB_STDFP
1579 memcpy (&r, &x, 8);
1580 #else
1581 /* emulation, only works for normals and subnormals and +0 */
1582 int neg = x >> 63;
1583 int e = (x >> 52) & 0x7ffU;
1584
1585 x &= 0xfffffffffffffU;
1586
1587 if (e)
1588 x |= 0x10000000000000U;
1589 else
1590 e = 1;
1591
1592 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1593 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1594
1595 r = neg ? -r : r;
1596 #endif
1597
1598 return r;
1599 }
1600
1601 /* convert a float to ieee half/binary16 */
1602 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1603 ecb_function_ ecb_const uint16_t
1604 ecb_float_to_binary16 (float x)
1605 {
1606 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1607 }
1608
1609 /* convert an ieee half/binary16 to float */
1610 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1611 ecb_function_ ecb_const float
1612 ecb_binary16_to_float (uint16_t x)
1613 {
1614 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1615 }
1616
1617#endif
1618
1619#endif
1620
1621/* ECB.H END */
1622
1623#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1624/* if your architecture doesn't need memory fences, e.g. because it is
1625 * single-cpu/core, or if you use libev in a project that doesn't use libev
1626 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1627 * libev, in which cases the memory fences become nops.
1628 * alternatively, you can remove this #error and link against libpthread,
1629 * which will then provide the memory fences.
1630 */
1631# error "memory fences not defined for your architecture, please report"
1632#endif
1633
1634#ifndef ECB_MEMORY_FENCE
1635# define ECB_MEMORY_FENCE do { } while (0)
1636# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1637# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1638#endif
1639
476#define inline_size static inline 1640#define inline_size ecb_inline
477 1641
478#if EV_FEATURE_CODE 1642#if EV_FEATURE_CODE
479# define inline_speed static inline 1643# define inline_speed ecb_inline
480#else 1644#else
481# define inline_speed static noinline 1645# define inline_speed ecb_noinline static
482#endif 1646#endif
483 1647
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1648#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1649
486#if EV_MINPRI == EV_MAXPRI 1650#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0) 1651# define ABSPRI(w) (((W)w), 0)
488#else 1652#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1653# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif 1654#endif
491 1655
492#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1656#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494 1657
495typedef ev_watcher *W; 1658typedef ev_watcher *W;
496typedef ev_watcher_list *WL; 1659typedef ev_watcher_list *WL;
497typedef ev_watcher_time *WT; 1660typedef ev_watcher_time *WT;
498 1661
… …
523# include "ev_win32.c" 1686# include "ev_win32.c"
524#endif 1687#endif
525 1688
526/*****************************************************************************/ 1689/*****************************************************************************/
527 1690
1691#if EV_USE_LINUXAIO
1692# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1693#endif
1694
1695/* define a suitable floor function (only used by periodics atm) */
1696
1697#if EV_USE_FLOOR
1698# include <math.h>
1699# define ev_floor(v) floor (v)
1700#else
1701
1702#include <float.h>
1703
1704/* a floor() replacement function, should be independent of ev_tstamp type */
1705ecb_noinline
1706static ev_tstamp
1707ev_floor (ev_tstamp v)
1708{
1709 /* the choice of shift factor is not terribly important */
1710#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1711 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1712#else
1713 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1714#endif
1715
1716 /* argument too large for an unsigned long? */
1717 if (ecb_expect_false (v >= shift))
1718 {
1719 ev_tstamp f;
1720
1721 if (v == v - 1.)
1722 return v; /* very large number */
1723
1724 f = shift * ev_floor (v * (1. / shift));
1725 return f + ev_floor (v - f);
1726 }
1727
1728 /* special treatment for negative args? */
1729 if (ecb_expect_false (v < 0.))
1730 {
1731 ev_tstamp f = -ev_floor (-v);
1732
1733 return f - (f == v ? 0 : 1);
1734 }
1735
1736 /* fits into an unsigned long */
1737 return (unsigned long)v;
1738}
1739
1740#endif
1741
1742/*****************************************************************************/
1743
1744#ifdef __linux
1745# include <sys/utsname.h>
1746#endif
1747
1748ecb_noinline ecb_cold
1749static unsigned int
1750ev_linux_version (void)
1751{
1752#ifdef __linux
1753 unsigned int v = 0;
1754 struct utsname buf;
1755 int i;
1756 char *p = buf.release;
1757
1758 if (uname (&buf))
1759 return 0;
1760
1761 for (i = 3+1; --i; )
1762 {
1763 unsigned int c = 0;
1764
1765 for (;;)
1766 {
1767 if (*p >= '0' && *p <= '9')
1768 c = c * 10 + *p++ - '0';
1769 else
1770 {
1771 p += *p == '.';
1772 break;
1773 }
1774 }
1775
1776 v = (v << 8) | c;
1777 }
1778
1779 return v;
1780#else
1781 return 0;
1782#endif
1783}
1784
1785/*****************************************************************************/
1786
528#if EV_AVOID_STDIO 1787#if EV_AVOID_STDIO
529static void noinline 1788ecb_noinline ecb_cold
1789static void
530ev_printerr (const char *msg) 1790ev_printerr (const char *msg)
531{ 1791{
532 write (STDERR_FILENO, msg, strlen (msg)); 1792 write (STDERR_FILENO, msg, strlen (msg));
533} 1793}
534#endif 1794#endif
535 1795
536static void (*syserr_cb)(const char *msg); 1796static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
537 1797
1798ecb_cold
538void 1799void
539ev_set_syserr_cb (void (*cb)(const char *msg)) 1800ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
540{ 1801{
541 syserr_cb = cb; 1802 syserr_cb = cb;
542} 1803}
543 1804
544static void noinline 1805ecb_noinline ecb_cold
1806static void
545ev_syserr (const char *msg) 1807ev_syserr (const char *msg)
546{ 1808{
547 if (!msg) 1809 if (!msg)
548 msg = "(libev) system error"; 1810 msg = "(libev) system error";
549 1811
550 if (syserr_cb) 1812 if (syserr_cb)
551 syserr_cb (msg); 1813 syserr_cb (msg);
552 else 1814 else
553 { 1815 {
554#if EV_AVOID_STDIO 1816#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 1817 ev_printerr (msg);
558 ev_printerr (": "); 1818 ev_printerr (": ");
559 ev_printerr (err); 1819 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 1820 ev_printerr ("\n");
561#else 1821#else
562 perror (msg); 1822 perror (msg);
563#endif 1823#endif
564 abort (); 1824 abort ();
565 } 1825 }
566} 1826}
567 1827
568static void * 1828static void *
569ev_realloc_emul (void *ptr, long size) 1829ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
570{ 1830{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly 1831 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and 1832 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here. 1833 * the single unix specification, so work around them here.
1834 * recently, also (at least) fedora and debian started breaking it,
1835 * despite documenting it otherwise.
577 */ 1836 */
578 1837
579 if (size) 1838 if (size)
580 return realloc (ptr, size); 1839 return realloc (ptr, size);
581 1840
582 free (ptr); 1841 free (ptr);
583 return 0; 1842 return 0;
584#endif
585} 1843}
586 1844
587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1845static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
588 1846
1847ecb_cold
589void 1848void
590ev_set_allocator (void *(*cb)(void *ptr, long size)) 1849ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
591{ 1850{
592 alloc = cb; 1851 alloc = cb;
593} 1852}
594 1853
595inline_speed void * 1854inline_speed void *
… …
598 ptr = alloc (ptr, size); 1857 ptr = alloc (ptr, size);
599 1858
600 if (!ptr && size) 1859 if (!ptr && size)
601 { 1860 {
602#if EV_AVOID_STDIO 1861#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1862 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 1863#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1864 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 1865#endif
607 abort (); 1866 abort ();
608 } 1867 }
609 1868
610 return ptr; 1869 return ptr;
… …
622typedef struct 1881typedef struct
623{ 1882{
624 WL head; 1883 WL head;
625 unsigned char events; /* the events watched for */ 1884 unsigned char events; /* the events watched for */
626 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1885 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1886 unsigned char emask; /* some backends store the actual kernel mask in here */
628 unsigned char unused; 1887 unsigned char unused;
629#if EV_USE_EPOLL 1888#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 1889 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 1890#endif
632#if EV_SELECT_IS_WINSOCKET 1891#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 1892 SOCKET handle;
1893#endif
1894#if EV_USE_IOCP
1895 OVERLAPPED or, ow;
634#endif 1896#endif
635} ANFD; 1897} ANFD;
636 1898
637/* stores the pending event set for a given watcher */ 1899/* stores the pending event set for a given watcher */
638typedef struct 1900typedef struct
… …
680 #undef VAR 1942 #undef VAR
681 }; 1943 };
682 #include "ev_wrap.h" 1944 #include "ev_wrap.h"
683 1945
684 static struct ev_loop default_loop_struct; 1946 static struct ev_loop default_loop_struct;
685 struct ev_loop *ev_default_loop_ptr; 1947 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
686 1948
687#else 1949#else
688 1950
689 ev_tstamp ev_rt_now; 1951 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
690 #define VAR(name,decl) static decl; 1952 #define VAR(name,decl) static decl;
691 #include "ev_vars.h" 1953 #include "ev_vars.h"
692 #undef VAR 1954 #undef VAR
693 1955
694 static int ev_default_loop_ptr; 1956 static int ev_default_loop_ptr;
695 1957
696#endif 1958#endif
697 1959
698#if EV_FEATURE_API 1960#if EV_FEATURE_API
699# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 1961# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
700# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 1962# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
701# define EV_INVOKE_PENDING invoke_cb (EV_A) 1963# define EV_INVOKE_PENDING invoke_cb (EV_A)
702#else 1964#else
703# define EV_RELEASE_CB (void)0 1965# define EV_RELEASE_CB (void)0
704# define EV_ACQUIRE_CB (void)0 1966# define EV_ACQUIRE_CB (void)0
705# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1967# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
… …
709 1971
710/*****************************************************************************/ 1972/*****************************************************************************/
711 1973
712#ifndef EV_HAVE_EV_TIME 1974#ifndef EV_HAVE_EV_TIME
713ev_tstamp 1975ev_tstamp
714ev_time (void) 1976ev_time (void) EV_NOEXCEPT
715{ 1977{
716#if EV_USE_REALTIME 1978#if EV_USE_REALTIME
717 if (expect_true (have_realtime)) 1979 if (ecb_expect_true (have_realtime))
718 { 1980 {
719 struct timespec ts; 1981 struct timespec ts;
720 clock_gettime (CLOCK_REALTIME, &ts); 1982 clock_gettime (CLOCK_REALTIME, &ts);
721 return ts.tv_sec + ts.tv_nsec * 1e-9; 1983 return ts.tv_sec + ts.tv_nsec * 1e-9;
722 } 1984 }
… …
730 1992
731inline_size ev_tstamp 1993inline_size ev_tstamp
732get_clock (void) 1994get_clock (void)
733{ 1995{
734#if EV_USE_MONOTONIC 1996#if EV_USE_MONOTONIC
735 if (expect_true (have_monotonic)) 1997 if (ecb_expect_true (have_monotonic))
736 { 1998 {
737 struct timespec ts; 1999 struct timespec ts;
738 clock_gettime (CLOCK_MONOTONIC, &ts); 2000 clock_gettime (CLOCK_MONOTONIC, &ts);
739 return ts.tv_sec + ts.tv_nsec * 1e-9; 2001 return ts.tv_sec + ts.tv_nsec * 1e-9;
740 } 2002 }
… …
743 return ev_time (); 2005 return ev_time ();
744} 2006}
745 2007
746#if EV_MULTIPLICITY 2008#if EV_MULTIPLICITY
747ev_tstamp 2009ev_tstamp
748ev_now (EV_P) 2010ev_now (EV_P) EV_NOEXCEPT
749{ 2011{
750 return ev_rt_now; 2012 return ev_rt_now;
751} 2013}
752#endif 2014#endif
753 2015
754void 2016void
755ev_sleep (ev_tstamp delay) 2017ev_sleep (ev_tstamp delay) EV_NOEXCEPT
756{ 2018{
757 if (delay > 0.) 2019 if (delay > 0.)
758 { 2020 {
759#if EV_USE_NANOSLEEP 2021#if EV_USE_NANOSLEEP
760 struct timespec ts; 2022 struct timespec ts;
761 2023
762 EV_TS_SET (ts, delay); 2024 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0); 2025 nanosleep (&ts, 0);
764#elif defined(_WIN32) 2026#elif defined _WIN32
2027 /* maybe this should round up, as ms is very low resolution */
2028 /* compared to select (µs) or nanosleep (ns) */
765 Sleep ((unsigned long)(delay * 1e3)); 2029 Sleep ((unsigned long)(delay * 1e3));
766#else 2030#else
767 struct timeval tv; 2031 struct timeval tv;
768 2032
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2033 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
788 2052
789 do 2053 do
790 ncur <<= 1; 2054 ncur <<= 1;
791 while (cnt > ncur); 2055 while (cnt > ncur);
792 2056
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2057 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2058 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
795 { 2059 {
796 ncur *= elem; 2060 ncur *= elem;
797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2061 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
798 ncur = ncur - sizeof (void *) * 4; 2062 ncur = ncur - sizeof (void *) * 4;
… …
800 } 2064 }
801 2065
802 return ncur; 2066 return ncur;
803} 2067}
804 2068
805static noinline void * 2069ecb_noinline ecb_cold
2070static void *
806array_realloc (int elem, void *base, int *cur, int cnt) 2071array_realloc (int elem, void *base, int *cur, int cnt)
807{ 2072{
808 *cur = array_nextsize (elem, *cur, cnt); 2073 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur); 2074 return ev_realloc (base, elem * *cur);
810} 2075}
811 2076
2077#define array_needsize_noinit(base,offset,count)
2078
812#define array_init_zero(base,count) \ 2079#define array_needsize_zerofill(base,offset,count) \
813 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2080 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
814 2081
815#define array_needsize(type,base,cur,cnt,init) \ 2082#define array_needsize(type,base,cur,cnt,init) \
816 if (expect_false ((cnt) > (cur))) \ 2083 if (ecb_expect_false ((cnt) > (cur))) \
817 { \ 2084 { \
818 int ocur_ = (cur); \ 2085 ecb_unused int ocur_ = (cur); \
819 (base) = (type *)array_realloc \ 2086 (base) = (type *)array_realloc \
820 (sizeof (type), (base), &(cur), (cnt)); \ 2087 (sizeof (type), (base), &(cur), (cnt)); \
821 init ((base) + (ocur_), (cur) - ocur_); \ 2088 init ((base), ocur_, ((cur) - ocur_)); \
822 } 2089 }
823 2090
824#if 0 2091#if 0
825#define array_slim(type,stem) \ 2092#define array_slim(type,stem) \
826 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2093 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
835 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2102 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
836 2103
837/*****************************************************************************/ 2104/*****************************************************************************/
838 2105
839/* dummy callback for pending events */ 2106/* dummy callback for pending events */
840static void noinline 2107ecb_noinline
2108static void
841pendingcb (EV_P_ ev_prepare *w, int revents) 2109pendingcb (EV_P_ ev_prepare *w, int revents)
842{ 2110{
843} 2111}
844 2112
845void noinline 2113ecb_noinline
2114void
846ev_feed_event (EV_P_ void *w, int revents) 2115ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
847{ 2116{
848 W w_ = (W)w; 2117 W w_ = (W)w;
849 int pri = ABSPRI (w_); 2118 int pri = ABSPRI (w_);
850 2119
851 if (expect_false (w_->pending)) 2120 if (ecb_expect_false (w_->pending))
852 pendings [pri][w_->pending - 1].events |= revents; 2121 pendings [pri][w_->pending - 1].events |= revents;
853 else 2122 else
854 { 2123 {
855 w_->pending = ++pendingcnt [pri]; 2124 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2125 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
857 pendings [pri][w_->pending - 1].w = w_; 2126 pendings [pri][w_->pending - 1].w = w_;
858 pendings [pri][w_->pending - 1].events = revents; 2127 pendings [pri][w_->pending - 1].events = revents;
859 } 2128 }
2129
2130 pendingpri = NUMPRI - 1;
860} 2131}
861 2132
862inline_speed void 2133inline_speed void
863feed_reverse (EV_P_ W w) 2134feed_reverse (EV_P_ W w)
864{ 2135{
865 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2136 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
866 rfeeds [rfeedcnt++] = w; 2137 rfeeds [rfeedcnt++] = w;
867} 2138}
868 2139
869inline_size void 2140inline_size void
870feed_reverse_done (EV_P_ int revents) 2141feed_reverse_done (EV_P_ int revents)
… …
905inline_speed void 2176inline_speed void
906fd_event (EV_P_ int fd, int revents) 2177fd_event (EV_P_ int fd, int revents)
907{ 2178{
908 ANFD *anfd = anfds + fd; 2179 ANFD *anfd = anfds + fd;
909 2180
910 if (expect_true (!anfd->reify)) 2181 if (ecb_expect_true (!anfd->reify))
911 fd_event_nocheck (EV_A_ fd, revents); 2182 fd_event_nocheck (EV_A_ fd, revents);
912} 2183}
913 2184
914void 2185void
915ev_feed_fd_event (EV_P_ int fd, int revents) 2186ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
916{ 2187{
917 if (fd >= 0 && fd < anfdmax) 2188 if (fd >= 0 && fd < anfdmax)
918 fd_event_nocheck (EV_A_ fd, revents); 2189 fd_event_nocheck (EV_A_ fd, revents);
919} 2190}
920 2191
… …
923inline_size void 2194inline_size void
924fd_reify (EV_P) 2195fd_reify (EV_P)
925{ 2196{
926 int i; 2197 int i;
927 2198
2199#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2200 for (i = 0; i < fdchangecnt; ++i)
2201 {
2202 int fd = fdchanges [i];
2203 ANFD *anfd = anfds + fd;
2204
2205 if (anfd->reify & EV__IOFDSET && anfd->head)
2206 {
2207 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2208
2209 if (handle != anfd->handle)
2210 {
2211 unsigned long arg;
2212
2213 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2214
2215 /* handle changed, but fd didn't - we need to do it in two steps */
2216 backend_modify (EV_A_ fd, anfd->events, 0);
2217 anfd->events = 0;
2218 anfd->handle = handle;
2219 }
2220 }
2221 }
2222#endif
2223
928 for (i = 0; i < fdchangecnt; ++i) 2224 for (i = 0; i < fdchangecnt; ++i)
929 { 2225 {
930 int fd = fdchanges [i]; 2226 int fd = fdchanges [i];
931 ANFD *anfd = anfds + fd; 2227 ANFD *anfd = anfds + fd;
932 ev_io *w; 2228 ev_io *w;
933 2229
934 unsigned char o_events = anfd->events; 2230 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 2231 unsigned char o_reify = anfd->reify;
936 2232
937 anfd->reify = 0; 2233 anfd->reify = 0;
938 2234
939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
941 {
942 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
945 }
946#endif
947
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2235 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 2236 {
950 anfd->events = 0; 2237 anfd->events = 0;
951 2238
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2239 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
953 anfd->events |= (unsigned char)w->events; 2240 anfd->events |= (unsigned char)w->events;
… …
962 2249
963 fdchangecnt = 0; 2250 fdchangecnt = 0;
964} 2251}
965 2252
966/* something about the given fd changed */ 2253/* something about the given fd changed */
967inline_size void 2254inline_size
2255void
968fd_change (EV_P_ int fd, int flags) 2256fd_change (EV_P_ int fd, int flags)
969{ 2257{
970 unsigned char reify = anfds [fd].reify; 2258 unsigned char reify = anfds [fd].reify;
971 anfds [fd].reify |= flags; 2259 anfds [fd].reify |= flags;
972 2260
973 if (expect_true (!reify)) 2261 if (ecb_expect_true (!reify))
974 { 2262 {
975 ++fdchangecnt; 2263 ++fdchangecnt;
976 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2264 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
977 fdchanges [fdchangecnt - 1] = fd; 2265 fdchanges [fdchangecnt - 1] = fd;
978 } 2266 }
979} 2267}
980 2268
981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2269/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void 2270inline_speed ecb_cold void
983fd_kill (EV_P_ int fd) 2271fd_kill (EV_P_ int fd)
984{ 2272{
985 ev_io *w; 2273 ev_io *w;
986 2274
987 while ((w = (ev_io *)anfds [fd].head)) 2275 while ((w = (ev_io *)anfds [fd].head))
… …
990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2278 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
991 } 2279 }
992} 2280}
993 2281
994/* check whether the given fd is actually valid, for error recovery */ 2282/* check whether the given fd is actually valid, for error recovery */
995inline_size int 2283inline_size ecb_cold int
996fd_valid (int fd) 2284fd_valid (int fd)
997{ 2285{
998#ifdef _WIN32 2286#ifdef _WIN32
999 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2287 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1000#else 2288#else
1001 return fcntl (fd, F_GETFD) != -1; 2289 return fcntl (fd, F_GETFD) != -1;
1002#endif 2290#endif
1003} 2291}
1004 2292
1005/* called on EBADF to verify fds */ 2293/* called on EBADF to verify fds */
1006static void noinline 2294ecb_noinline ecb_cold
2295static void
1007fd_ebadf (EV_P) 2296fd_ebadf (EV_P)
1008{ 2297{
1009 int fd; 2298 int fd;
1010 2299
1011 for (fd = 0; fd < anfdmax; ++fd) 2300 for (fd = 0; fd < anfdmax; ++fd)
… …
1013 if (!fd_valid (fd) && errno == EBADF) 2302 if (!fd_valid (fd) && errno == EBADF)
1014 fd_kill (EV_A_ fd); 2303 fd_kill (EV_A_ fd);
1015} 2304}
1016 2305
1017/* called on ENOMEM in select/poll to kill some fds and retry */ 2306/* called on ENOMEM in select/poll to kill some fds and retry */
1018static void noinline 2307ecb_noinline ecb_cold
2308static void
1019fd_enomem (EV_P) 2309fd_enomem (EV_P)
1020{ 2310{
1021 int fd; 2311 int fd;
1022 2312
1023 for (fd = anfdmax; fd--; ) 2313 for (fd = anfdmax; fd--; )
… …
1027 break; 2317 break;
1028 } 2318 }
1029} 2319}
1030 2320
1031/* usually called after fork if backend needs to re-arm all fds from scratch */ 2321/* usually called after fork if backend needs to re-arm all fds from scratch */
1032static void noinline 2322ecb_noinline
2323static void
1033fd_rearm_all (EV_P) 2324fd_rearm_all (EV_P)
1034{ 2325{
1035 int fd; 2326 int fd;
1036 2327
1037 for (fd = 0; fd < anfdmax; ++fd) 2328 for (fd = 0; fd < anfdmax; ++fd)
… …
1090 ev_tstamp minat; 2381 ev_tstamp minat;
1091 ANHE *minpos; 2382 ANHE *minpos;
1092 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2383 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1093 2384
1094 /* find minimum child */ 2385 /* find minimum child */
1095 if (expect_true (pos + DHEAP - 1 < E)) 2386 if (ecb_expect_true (pos + DHEAP - 1 < E))
1096 { 2387 {
1097 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2388 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1098 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2389 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1099 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2390 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1100 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2391 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
… …
1218 2509
1219/*****************************************************************************/ 2510/*****************************************************************************/
1220 2511
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2512#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222 2513
1223static void noinline 2514ecb_noinline ecb_cold
2515static void
1224evpipe_init (EV_P) 2516evpipe_init (EV_P)
1225{ 2517{
1226 if (!ev_is_active (&pipe_w)) 2518 if (!ev_is_active (&pipe_w))
1227 { 2519 {
2520 int fds [2];
2521
1228# if EV_USE_EVENTFD 2522# if EV_USE_EVENTFD
2523 fds [0] = -1;
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2524 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL) 2525 if (fds [1] < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0); 2526 fds [1] = eventfd (0, 0);
1232 2527
1233 if (evfd >= 0) 2528 if (fds [1] < 0)
2529# endif
1234 { 2530 {
2531 while (pipe (fds))
2532 ev_syserr ("(libev) error creating signal/async pipe");
2533
2534 fd_intern (fds [0]);
2535 }
2536
1235 evpipe [0] = -1; 2537 evpipe [0] = fds [0];
1236 fd_intern (evfd); /* doing it twice doesn't hurt */ 2538
1237 ev_io_set (&pipe_w, evfd, EV_READ); 2539 if (evpipe [1] < 0)
2540 evpipe [1] = fds [1]; /* first call, set write fd */
2541 else
2542 {
2543 /* on subsequent calls, do not change evpipe [1] */
2544 /* so that evpipe_write can always rely on its value. */
2545 /* this branch does not do anything sensible on windows, */
2546 /* so must not be executed on windows */
2547
2548 dup2 (fds [1], evpipe [1]);
2549 close (fds [1]);
2550 }
2551
2552 fd_intern (evpipe [1]);
2553
2554 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2555 ev_io_start (EV_A_ &pipe_w);
2556 ev_unref (EV_A); /* watcher should not keep loop alive */
2557 }
2558}
2559
2560inline_speed void
2561evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2562{
2563 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2564
2565 if (ecb_expect_true (*flag))
2566 return;
2567
2568 *flag = 1;
2569 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2570
2571 pipe_write_skipped = 1;
2572
2573 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2574
2575 if (pipe_write_wanted)
2576 {
2577 int old_errno;
2578
2579 pipe_write_skipped = 0;
2580 ECB_MEMORY_FENCE_RELEASE;
2581
2582 old_errno = errno; /* save errno because write will clobber it */
2583
2584#if EV_USE_EVENTFD
2585 if (evpipe [0] < 0)
2586 {
2587 uint64_t counter = 1;
2588 write (evpipe [1], &counter, sizeof (uint64_t));
1238 } 2589 }
1239 else 2590 else
1240# endif 2591#endif
1241 { 2592 {
1242 while (pipe (evpipe)) 2593#ifdef _WIN32
1243 ev_syserr ("(libev) error creating signal/async pipe"); 2594 WSABUF buf;
1244 2595 DWORD sent;
1245 fd_intern (evpipe [0]); 2596 buf.buf = (char *)&buf;
1246 fd_intern (evpipe [1]); 2597 buf.len = 1;
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2598 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2599#else
2600 write (evpipe [1], &(evpipe [1]), 1);
2601#endif
1248 } 2602 }
1249
1250 ev_io_start (EV_A_ &pipe_w);
1251 ev_unref (EV_A); /* watcher should not keep loop alive */
1252 }
1253}
1254
1255inline_size void
1256evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1257{
1258 if (!*flag)
1259 {
1260 int old_errno = errno; /* save errno because write might clobber it */
1261 char dummy;
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 /* win32 people keep sending patches that change this write() to send() */
1274 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1275 /* so when you think this write should be a send instead, please find out */
1276 /* where your send() is from - it's definitely not the microsoft send, and */
1277 /* tell me. thank you. */
1278 write (evpipe [1], &dummy, 1);
1279 2603
1280 errno = old_errno; 2604 errno = old_errno;
1281 } 2605 }
1282} 2606}
1283 2607
… …
1286static void 2610static void
1287pipecb (EV_P_ ev_io *iow, int revents) 2611pipecb (EV_P_ ev_io *iow, int revents)
1288{ 2612{
1289 int i; 2613 int i;
1290 2614
2615 if (revents & EV_READ)
2616 {
1291#if EV_USE_EVENTFD 2617#if EV_USE_EVENTFD
1292 if (evfd >= 0) 2618 if (evpipe [0] < 0)
1293 { 2619 {
1294 uint64_t counter; 2620 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 2621 read (evpipe [1], &counter, sizeof (uint64_t));
1296 } 2622 }
1297 else 2623 else
1298#endif 2624#endif
1299 { 2625 {
1300 char dummy; 2626 char dummy[4];
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2627#ifdef _WIN32
2628 WSABUF buf;
2629 DWORD recvd;
2630 DWORD flags = 0;
2631 buf.buf = dummy;
2632 buf.len = sizeof (dummy);
2633 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2634#else
1302 read (evpipe [0], &dummy, 1); 2635 read (evpipe [0], &dummy, sizeof (dummy));
2636#endif
2637 }
1303 } 2638 }
1304 2639
2640 pipe_write_skipped = 0;
2641
2642 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2643
2644#if EV_SIGNAL_ENABLE
1305 if (sig_pending) 2645 if (sig_pending)
1306 { 2646 {
1307 sig_pending = 0; 2647 sig_pending = 0;
1308 2648
2649 ECB_MEMORY_FENCE;
2650
1309 for (i = EV_NSIG - 1; i--; ) 2651 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending)) 2652 if (ecb_expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1); 2653 ev_feed_signal_event (EV_A_ i + 1);
1312 } 2654 }
2655#endif
1313 2656
1314#if EV_ASYNC_ENABLE 2657#if EV_ASYNC_ENABLE
1315 if (async_pending) 2658 if (async_pending)
1316 { 2659 {
1317 async_pending = 0; 2660 async_pending = 0;
2661
2662 ECB_MEMORY_FENCE;
1318 2663
1319 for (i = asynccnt; i--; ) 2664 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent) 2665 if (asyncs [i]->sent)
1321 { 2666 {
1322 asyncs [i]->sent = 0; 2667 asyncs [i]->sent = 0;
2668 ECB_MEMORY_FENCE_RELEASE;
1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2669 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1324 } 2670 }
1325 } 2671 }
1326#endif 2672#endif
1327} 2673}
1328 2674
1329/*****************************************************************************/ 2675/*****************************************************************************/
1330 2676
2677void
2678ev_feed_signal (int signum) EV_NOEXCEPT
2679{
2680#if EV_MULTIPLICITY
2681 EV_P;
2682 ECB_MEMORY_FENCE_ACQUIRE;
2683 EV_A = signals [signum - 1].loop;
2684
2685 if (!EV_A)
2686 return;
2687#endif
2688
2689 signals [signum - 1].pending = 1;
2690 evpipe_write (EV_A_ &sig_pending);
2691}
2692
1331static void 2693static void
1332ev_sighandler (int signum) 2694ev_sighandler (int signum)
1333{ 2695{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 2696#ifdef _WIN32
1339 signal (signum, ev_sighandler); 2697 signal (signum, ev_sighandler);
1340#endif 2698#endif
1341 2699
1342 signals [signum - 1].pending = 1; 2700 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 2701}
1345 2702
1346void noinline 2703ecb_noinline
2704void
1347ev_feed_signal_event (EV_P_ int signum) 2705ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1348{ 2706{
1349 WL w; 2707 WL w;
1350 2708
1351 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2709 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1352 return; 2710 return;
1353 2711
1354 --signum; 2712 --signum;
1355 2713
1356#if EV_MULTIPLICITY 2714#if EV_MULTIPLICITY
1357 /* it is permissible to try to feed a signal to the wrong loop */ 2715 /* it is permissible to try to feed a signal to the wrong loop */
1358 /* or, likely more useful, feeding a signal nobody is waiting for */ 2716 /* or, likely more useful, feeding a signal nobody is waiting for */
1359 2717
1360 if (expect_false (signals [signum].loop != EV_A)) 2718 if (ecb_expect_false (signals [signum].loop != EV_A))
1361 return; 2719 return;
1362#endif 2720#endif
1363 2721
1364 signals [signum].pending = 0; 2722 signals [signum].pending = 0;
2723 ECB_MEMORY_FENCE_RELEASE;
1365 2724
1366 for (w = signals [signum].head; w; w = w->next) 2725 for (w = signals [signum].head; w; w = w->next)
1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2726 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1368} 2727}
1369 2728
… …
1448 2807
1449#endif 2808#endif
1450 2809
1451/*****************************************************************************/ 2810/*****************************************************************************/
1452 2811
2812#if EV_USE_IOCP
2813# include "ev_iocp.c"
2814#endif
1453#if EV_USE_PORT 2815#if EV_USE_PORT
1454# include "ev_port.c" 2816# include "ev_port.c"
1455#endif 2817#endif
1456#if EV_USE_KQUEUE 2818#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 2819# include "ev_kqueue.c"
1458#endif 2820#endif
1459#if EV_USE_EPOLL 2821#if EV_USE_EPOLL
1460# include "ev_epoll.c" 2822# include "ev_epoll.c"
1461#endif 2823#endif
2824#if EV_USE_LINUXAIO
2825# include "ev_linuxaio.c"
2826#endif
2827#if EV_USE_IOURING
2828# include "ev_iouring.c"
2829#endif
1462#if EV_USE_POLL 2830#if EV_USE_POLL
1463# include "ev_poll.c" 2831# include "ev_poll.c"
1464#endif 2832#endif
1465#if EV_USE_SELECT 2833#if EV_USE_SELECT
1466# include "ev_select.c" 2834# include "ev_select.c"
1467#endif 2835#endif
1468 2836
1469int 2837ecb_cold int
1470ev_version_major (void) 2838ev_version_major (void) EV_NOEXCEPT
1471{ 2839{
1472 return EV_VERSION_MAJOR; 2840 return EV_VERSION_MAJOR;
1473} 2841}
1474 2842
1475int 2843ecb_cold int
1476ev_version_minor (void) 2844ev_version_minor (void) EV_NOEXCEPT
1477{ 2845{
1478 return EV_VERSION_MINOR; 2846 return EV_VERSION_MINOR;
1479} 2847}
1480 2848
1481/* return true if we are running with elevated privileges and should ignore env variables */ 2849/* return true if we are running with elevated privileges and should ignore env variables */
1482int inline_size 2850inline_size ecb_cold int
1483enable_secure (void) 2851enable_secure (void)
1484{ 2852{
1485#ifdef _WIN32 2853#ifdef _WIN32
1486 return 0; 2854 return 0;
1487#else 2855#else
1488 return getuid () != geteuid () 2856 return getuid () != geteuid ()
1489 || getgid () != getegid (); 2857 || getgid () != getegid ();
1490#endif 2858#endif
1491} 2859}
1492 2860
2861ecb_cold
1493unsigned int 2862unsigned int
1494ev_supported_backends (void) 2863ev_supported_backends (void) EV_NOEXCEPT
1495{ 2864{
1496 unsigned int flags = 0; 2865 unsigned int flags = 0;
1497 2866
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2867 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2868 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1500 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2869 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2870 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
2871 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING;
1501 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2872 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2873 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1503 2874
1504 return flags; 2875 return flags;
1505} 2876}
1506 2877
2878ecb_cold
1507unsigned int 2879unsigned int
1508ev_recommended_backends (void) 2880ev_recommended_backends (void) EV_NOEXCEPT
1509{ 2881{
1510 unsigned int flags = ev_supported_backends (); 2882 unsigned int flags = ev_supported_backends ();
1511 2883
1512#ifndef __NetBSD__ 2884#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */ 2885 /* kqueue is borked on everything but netbsd apparently */
… …
1521#endif 2893#endif
1522#ifdef __FreeBSD__ 2894#ifdef __FreeBSD__
1523 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2895 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1524#endif 2896#endif
1525 2897
2898 /* TODO: linuxaio is very experimental */
2899#if !EV_RECOMMEND_LINUXAIO
2900 flags &= ~EVBACKEND_LINUXAIO;
2901#endif
2902 /* TODO: linuxaio is super experimental */
2903#if !EV_RECOMMEND_IOURING
2904 flags &= ~EVBACKEND_IOURING;
2905#endif
2906
1526 return flags; 2907 return flags;
1527} 2908}
1528 2909
2910ecb_cold
1529unsigned int 2911unsigned int
1530ev_embeddable_backends (void) 2912ev_embeddable_backends (void) EV_NOEXCEPT
1531{ 2913{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2914 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533 2915
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2916 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */ 2917 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1536 flags &= ~EVBACKEND_EPOLL; 2918 flags &= ~EVBACKEND_EPOLL;
1537 2919
1538 return flags; 2920 return flags;
1539} 2921}
1540 2922
1541unsigned int 2923unsigned int
1542ev_backend (EV_P) 2924ev_backend (EV_P) EV_NOEXCEPT
1543{ 2925{
1544 return backend; 2926 return backend;
1545} 2927}
1546 2928
1547#if EV_FEATURE_API 2929#if EV_FEATURE_API
1548unsigned int 2930unsigned int
1549ev_iteration (EV_P) 2931ev_iteration (EV_P) EV_NOEXCEPT
1550{ 2932{
1551 return loop_count; 2933 return loop_count;
1552} 2934}
1553 2935
1554unsigned int 2936unsigned int
1555ev_depth (EV_P) 2937ev_depth (EV_P) EV_NOEXCEPT
1556{ 2938{
1557 return loop_depth; 2939 return loop_depth;
1558} 2940}
1559 2941
1560void 2942void
1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2943ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1562{ 2944{
1563 io_blocktime = interval; 2945 io_blocktime = interval;
1564} 2946}
1565 2947
1566void 2948void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2949ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1568{ 2950{
1569 timeout_blocktime = interval; 2951 timeout_blocktime = interval;
1570} 2952}
1571 2953
1572void 2954void
1573ev_set_userdata (EV_P_ void *data) 2955ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1574{ 2956{
1575 userdata = data; 2957 userdata = data;
1576} 2958}
1577 2959
1578void * 2960void *
1579ev_userdata (EV_P) 2961ev_userdata (EV_P) EV_NOEXCEPT
1580{ 2962{
1581 return userdata; 2963 return userdata;
1582} 2964}
1583 2965
2966void
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2967ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1585{ 2968{
1586 invoke_cb = invoke_pending_cb; 2969 invoke_cb = invoke_pending_cb;
1587} 2970}
1588 2971
2972void
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2973ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1590{ 2974{
1591 release_cb = release; 2975 release_cb = release;
1592 acquire_cb = acquire; 2976 acquire_cb = acquire;
1593} 2977}
1594#endif 2978#endif
1595 2979
1596/* initialise a loop structure, must be zero-initialised */ 2980/* initialise a loop structure, must be zero-initialised */
1597static void noinline 2981ecb_noinline ecb_cold
2982static void
1598loop_init (EV_P_ unsigned int flags) 2983loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1599{ 2984{
1600 if (!backend) 2985 if (!backend)
1601 { 2986 {
2987 origflags = flags;
2988
1602#if EV_USE_REALTIME 2989#if EV_USE_REALTIME
1603 if (!have_realtime) 2990 if (!have_realtime)
1604 { 2991 {
1605 struct timespec ts; 2992 struct timespec ts;
1606 2993
… …
1628 if (!(flags & EVFLAG_NOENV) 3015 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure () 3016 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS")) 3017 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS")); 3018 flags = atoi (getenv ("LIBEV_FLAGS"));
1632 3019
1633 ev_rt_now = ev_time (); 3020 ev_rt_now = ev_time ();
1634 mn_now = get_clock (); 3021 mn_now = get_clock ();
1635 now_floor = mn_now; 3022 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now; 3023 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API 3024#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending; 3025 invoke_cb = ev_invoke_pending;
1639#endif 3026#endif
1640 3027
1641 io_blocktime = 0.; 3028 io_blocktime = 0.;
1642 timeout_blocktime = 0.; 3029 timeout_blocktime = 0.;
1643 backend = 0; 3030 backend = 0;
1644 backend_fd = -1; 3031 backend_fd = -1;
1645 sig_pending = 0; 3032 sig_pending = 0;
1646#if EV_ASYNC_ENABLE 3033#if EV_ASYNC_ENABLE
1647 async_pending = 0; 3034 async_pending = 0;
1648#endif 3035#endif
3036 pipe_write_skipped = 0;
3037 pipe_write_wanted = 0;
3038 evpipe [0] = -1;
3039 evpipe [1] = -1;
1649#if EV_USE_INOTIFY 3040#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3041 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif 3042#endif
1652#if EV_USE_SIGNALFD 3043#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3044 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 3045#endif
1655 3046
1656 if (!(flags & 0x0000ffffU)) 3047 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 3048 flags |= ev_recommended_backends ();
1658 3049
3050#if EV_USE_IOCP
3051 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3052#endif
1659#if EV_USE_PORT 3053#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3054 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 3055#endif
1662#if EV_USE_KQUEUE 3056#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3057 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3058#endif
3059#if EV_USE_IOURING
3060 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3061#endif
3062#if EV_USE_LINUXAIO
3063 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1664#endif 3064#endif
1665#if EV_USE_EPOLL 3065#if EV_USE_EPOLL
1666 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3066 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1667#endif 3067#endif
1668#if EV_USE_POLL 3068#if EV_USE_POLL
1669 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3069 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1670#endif 3070#endif
1671#if EV_USE_SELECT 3071#if EV_USE_SELECT
1672 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3072 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1673#endif 3073#endif
1674 3074
1675 ev_prepare_init (&pending_w, pendingcb); 3075 ev_prepare_init (&pending_w, pendingcb);
1676 3076
1677#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3077#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1680#endif 3080#endif
1681 } 3081 }
1682} 3082}
1683 3083
1684/* free up a loop structure */ 3084/* free up a loop structure */
1685static void noinline 3085ecb_cold
3086void
1686loop_destroy (EV_P) 3087ev_loop_destroy (EV_P)
1687{ 3088{
1688 int i; 3089 int i;
3090
3091#if EV_MULTIPLICITY
3092 /* mimic free (0) */
3093 if (!EV_A)
3094 return;
3095#endif
3096
3097#if EV_CLEANUP_ENABLE
3098 /* queue cleanup watchers (and execute them) */
3099 if (ecb_expect_false (cleanupcnt))
3100 {
3101 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3102 EV_INVOKE_PENDING;
3103 }
3104#endif
3105
3106#if EV_CHILD_ENABLE
3107 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3108 {
3109 ev_ref (EV_A); /* child watcher */
3110 ev_signal_stop (EV_A_ &childev);
3111 }
3112#endif
1689 3113
1690 if (ev_is_active (&pipe_w)) 3114 if (ev_is_active (&pipe_w))
1691 { 3115 {
1692 /*ev_ref (EV_A);*/ 3116 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 3117 /*ev_io_stop (EV_A_ &pipe_w);*/
1694 3118
1695#if EV_USE_EVENTFD
1696 if (evfd >= 0)
1697 close (evfd);
1698#endif
1699
1700 if (evpipe [0] >= 0)
1701 {
1702 EV_WIN32_CLOSE_FD (evpipe [0]); 3119 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]); 3120 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 } 3121 }
1706 3122
1707#if EV_USE_SIGNALFD 3123#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w)) 3124 if (ev_is_active (&sigfd_w))
1709 close (sigfd); 3125 close (sigfd);
… …
1715#endif 3131#endif
1716 3132
1717 if (backend_fd >= 0) 3133 if (backend_fd >= 0)
1718 close (backend_fd); 3134 close (backend_fd);
1719 3135
3136#if EV_USE_IOCP
3137 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3138#endif
1720#if EV_USE_PORT 3139#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3140 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 3141#endif
1723#if EV_USE_KQUEUE 3142#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3143 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3144#endif
3145#if EV_USE_IOURING
3146 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3147#endif
3148#if EV_USE_LINUXAIO
3149 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1725#endif 3150#endif
1726#if EV_USE_EPOLL 3151#if EV_USE_EPOLL
1727 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3152 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1728#endif 3153#endif
1729#if EV_USE_POLL 3154#if EV_USE_POLL
1730 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3155 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1731#endif 3156#endif
1732#if EV_USE_SELECT 3157#if EV_USE_SELECT
1733 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3158 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1734#endif 3159#endif
1735 3160
1736 for (i = NUMPRI; i--; ) 3161 for (i = NUMPRI; i--; )
1737 { 3162 {
1738 array_free (pending, [i]); 3163 array_free (pending, [i]);
… …
1751 array_free (periodic, EMPTY); 3176 array_free (periodic, EMPTY);
1752#endif 3177#endif
1753#if EV_FORK_ENABLE 3178#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 3179 array_free (fork, EMPTY);
1755#endif 3180#endif
3181#if EV_CLEANUP_ENABLE
3182 array_free (cleanup, EMPTY);
3183#endif
1756 array_free (prepare, EMPTY); 3184 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 3185 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 3186#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 3187 array_free (async, EMPTY);
1760#endif 3188#endif
1761 3189
1762 backend = 0; 3190 backend = 0;
3191
3192#if EV_MULTIPLICITY
3193 if (ev_is_default_loop (EV_A))
3194#endif
3195 ev_default_loop_ptr = 0;
3196#if EV_MULTIPLICITY
3197 else
3198 ev_free (EV_A);
3199#endif
1763} 3200}
1764 3201
1765#if EV_USE_INOTIFY 3202#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 3203inline_size void infy_fork (EV_P);
1767#endif 3204#endif
1768 3205
1769inline_size void 3206inline_size void
1770loop_fork (EV_P) 3207loop_fork (EV_P)
1771{ 3208{
1772#if EV_USE_PORT 3209#if EV_USE_PORT
1773 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3210 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1774#endif 3211#endif
1775#if EV_USE_KQUEUE 3212#if EV_USE_KQUEUE
1776 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3213 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3214#endif
3215#if EV_USE_IOURING
3216 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3217#endif
3218#if EV_USE_LINUXAIO
3219 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1777#endif 3220#endif
1778#if EV_USE_EPOLL 3221#if EV_USE_EPOLL
1779 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3222 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1780#endif 3223#endif
1781#if EV_USE_INOTIFY 3224#if EV_USE_INOTIFY
1782 infy_fork (EV_A); 3225 infy_fork (EV_A);
1783#endif 3226#endif
1784 3227
3228#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1785 if (ev_is_active (&pipe_w)) 3229 if (ev_is_active (&pipe_w) && postfork != 2)
1786 { 3230 {
1787 /* this "locks" the handlers against writing to the pipe */ 3231 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1788 /* while we modify the fd vars */
1789 sig_pending = 1;
1790#if EV_ASYNC_ENABLE
1791 async_pending = 1;
1792#endif
1793 3232
1794 ev_ref (EV_A); 3233 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w); 3234 ev_io_stop (EV_A_ &pipe_w);
1796 3235
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0) 3236 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]); 3237 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807 3238
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A); 3239 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */ 3240 /* iterate over everything, in case we missed something before */
1811 pipecb (EV_A_ &pipe_w, EV_READ); 3241 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1812#endif
1813 } 3242 }
3243#endif
1814 3244
1815 postfork = 0; 3245 postfork = 0;
1816} 3246}
1817 3247
1818#if EV_MULTIPLICITY 3248#if EV_MULTIPLICITY
1819 3249
3250ecb_cold
1820struct ev_loop * 3251struct ev_loop *
1821ev_loop_new (unsigned int flags) 3252ev_loop_new (unsigned int flags) EV_NOEXCEPT
1822{ 3253{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3254 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824 3255
1825 memset (EV_A, 0, sizeof (struct ev_loop)); 3256 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags); 3257 loop_init (EV_A_ flags);
1827 3258
1828 if (ev_backend (EV_A)) 3259 if (ev_backend (EV_A))
1829 return EV_A; 3260 return EV_A;
1830 3261
3262 ev_free (EV_A);
1831 return 0; 3263 return 0;
1832} 3264}
1833 3265
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */ 3266#endif /* multiplicity */
1847 3267
1848#if EV_VERIFY 3268#if EV_VERIFY
1849static void noinline 3269ecb_noinline ecb_cold
3270static void
1850verify_watcher (EV_P_ W w) 3271verify_watcher (EV_P_ W w)
1851{ 3272{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3273 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853 3274
1854 if (w->pending) 3275 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3276 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856} 3277}
1857 3278
1858static void noinline 3279ecb_noinline ecb_cold
3280static void
1859verify_heap (EV_P_ ANHE *heap, int N) 3281verify_heap (EV_P_ ANHE *heap, int N)
1860{ 3282{
1861 int i; 3283 int i;
1862 3284
1863 for (i = HEAP0; i < N + HEAP0; ++i) 3285 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1868 3290
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3291 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 } 3292 }
1871} 3293}
1872 3294
1873static void noinline 3295ecb_noinline ecb_cold
3296static void
1874array_verify (EV_P_ W *ws, int cnt) 3297array_verify (EV_P_ W *ws, int cnt)
1875{ 3298{
1876 while (cnt--) 3299 while (cnt--)
1877 { 3300 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3301 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1880 } 3303 }
1881} 3304}
1882#endif 3305#endif
1883 3306
1884#if EV_FEATURE_API 3307#if EV_FEATURE_API
1885void 3308void ecb_cold
1886ev_verify (EV_P) 3309ev_verify (EV_P) EV_NOEXCEPT
1887{ 3310{
1888#if EV_VERIFY 3311#if EV_VERIFY
1889 int i; 3312 int i;
1890 WL w; 3313 WL w, w2;
1891 3314
1892 assert (activecnt >= -1); 3315 assert (activecnt >= -1);
1893 3316
1894 assert (fdchangemax >= fdchangecnt); 3317 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i) 3318 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3319 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897 3320
1898 assert (anfdmax >= 0); 3321 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i) 3322 for (i = 0; i < anfdmax; ++i)
3323 {
3324 int j = 0;
3325
1900 for (w = anfds [i].head; w; w = w->next) 3326 for (w = w2 = anfds [i].head; w; w = w->next)
1901 { 3327 {
1902 verify_watcher (EV_A_ (W)w); 3328 verify_watcher (EV_A_ (W)w);
3329
3330 if (j++ & 1)
3331 {
3332 assert (("libev: io watcher list contains a loop", w != w2));
3333 w2 = w2->next;
3334 }
3335
1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3336 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1904 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3337 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1905 } 3338 }
3339 }
1906 3340
1907 assert (timermax >= timercnt); 3341 assert (timermax >= timercnt);
1908 verify_heap (EV_A_ timers, timercnt); 3342 verify_heap (EV_A_ timers, timercnt);
1909 3343
1910#if EV_PERIODIC_ENABLE 3344#if EV_PERIODIC_ENABLE
… …
1925#if EV_FORK_ENABLE 3359#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 3360 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 3361 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 3362#endif
1929 3363
3364#if EV_CLEANUP_ENABLE
3365 assert (cleanupmax >= cleanupcnt);
3366 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3367#endif
3368
1930#if EV_ASYNC_ENABLE 3369#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 3370 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 3371 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 3372#endif
1934 3373
… …
1951#endif 3390#endif
1952} 3391}
1953#endif 3392#endif
1954 3393
1955#if EV_MULTIPLICITY 3394#if EV_MULTIPLICITY
3395ecb_cold
1956struct ev_loop * 3396struct ev_loop *
1957ev_default_loop_init (unsigned int flags)
1958#else 3397#else
1959int 3398int
3399#endif
1960ev_default_loop (unsigned int flags) 3400ev_default_loop (unsigned int flags) EV_NOEXCEPT
1961#endif
1962{ 3401{
1963 if (!ev_default_loop_ptr) 3402 if (!ev_default_loop_ptr)
1964 { 3403 {
1965#if EV_MULTIPLICITY 3404#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 3405 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1985 3424
1986 return ev_default_loop_ptr; 3425 return ev_default_loop_ptr;
1987} 3426}
1988 3427
1989void 3428void
1990ev_default_destroy (void) 3429ev_loop_fork (EV_P) EV_NOEXCEPT
1991{ 3430{
1992#if EV_MULTIPLICITY 3431 postfork = 1;
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */
2014} 3432}
2015 3433
2016/*****************************************************************************/ 3434/*****************************************************************************/
2017 3435
2018void 3436void
… …
2020{ 3438{
2021 EV_CB_INVOKE ((W)w, revents); 3439 EV_CB_INVOKE ((W)w, revents);
2022} 3440}
2023 3441
2024unsigned int 3442unsigned int
2025ev_pending_count (EV_P) 3443ev_pending_count (EV_P) EV_NOEXCEPT
2026{ 3444{
2027 int pri; 3445 int pri;
2028 unsigned int count = 0; 3446 unsigned int count = 0;
2029 3447
2030 for (pri = NUMPRI; pri--; ) 3448 for (pri = NUMPRI; pri--; )
2031 count += pendingcnt [pri]; 3449 count += pendingcnt [pri];
2032 3450
2033 return count; 3451 return count;
2034} 3452}
2035 3453
2036void noinline 3454ecb_noinline
3455void
2037ev_invoke_pending (EV_P) 3456ev_invoke_pending (EV_P)
2038{ 3457{
2039 int pri; 3458 pendingpri = NUMPRI;
2040 3459
2041 for (pri = NUMPRI; pri--; ) 3460 do
3461 {
3462 --pendingpri;
3463
3464 /* pendingpri possibly gets modified in the inner loop */
2042 while (pendingcnt [pri]) 3465 while (pendingcnt [pendingpri])
2043 { 3466 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3467 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2045 3468
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048
2049 p->w->pending = 0; 3469 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 3470 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 3471 EV_FREQUENT_CHECK;
2052 } 3472 }
3473 }
3474 while (pendingpri);
2053} 3475}
2054 3476
2055#if EV_IDLE_ENABLE 3477#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */ 3478/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */ 3479/* only when higher priorities are idle" logic */
2058inline_size void 3480inline_size void
2059idle_reify (EV_P) 3481idle_reify (EV_P)
2060{ 3482{
2061 if (expect_false (idleall)) 3483 if (ecb_expect_false (idleall))
2062 { 3484 {
2063 int pri; 3485 int pri;
2064 3486
2065 for (pri = NUMPRI; pri--; ) 3487 for (pri = NUMPRI; pri--; )
2066 { 3488 {
… …
2114 feed_reverse_done (EV_A_ EV_TIMER); 3536 feed_reverse_done (EV_A_ EV_TIMER);
2115 } 3537 }
2116} 3538}
2117 3539
2118#if EV_PERIODIC_ENABLE 3540#if EV_PERIODIC_ENABLE
3541
3542ecb_noinline
3543static void
3544periodic_recalc (EV_P_ ev_periodic *w)
3545{
3546 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3547 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3548
3549 /* the above almost always errs on the low side */
3550 while (at <= ev_rt_now)
3551 {
3552 ev_tstamp nat = at + w->interval;
3553
3554 /* when resolution fails us, we use ev_rt_now */
3555 if (ecb_expect_false (nat == at))
3556 {
3557 at = ev_rt_now;
3558 break;
3559 }
3560
3561 at = nat;
3562 }
3563
3564 ev_at (w) = at;
3565}
3566
2119/* make periodics pending */ 3567/* make periodics pending */
2120inline_size void 3568inline_size void
2121periodics_reify (EV_P) 3569periodics_reify (EV_P)
2122{ 3570{
2123 EV_FREQUENT_CHECK; 3571 EV_FREQUENT_CHECK;
2124 3572
2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3573 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2126 { 3574 {
2127 int feed_count = 0;
2128
2129 do 3575 do
2130 { 3576 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3577 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132 3578
2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3579 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2142 ANHE_at_cache (periodics [HEAP0]); 3588 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0); 3589 downheap (periodics, periodiccnt, HEAP0);
2144 } 3590 }
2145 else if (w->interval) 3591 else if (w->interval)
2146 { 3592 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3593 periodic_recalc (EV_A_ w);
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]); 3594 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0); 3595 downheap (periodics, periodiccnt, HEAP0);
2163 } 3596 }
2164 else 3597 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3598 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2173 } 3606 }
2174} 3607}
2175 3608
2176/* simply recalculate all periodics */ 3609/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3610/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline 3611ecb_noinline ecb_cold
3612static void
2179periodics_reschedule (EV_P) 3613periodics_reschedule (EV_P)
2180{ 3614{
2181 int i; 3615 int i;
2182 3616
2183 /* adjust periodics after time jump */ 3617 /* adjust periodics after time jump */
… …
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3620 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187 3621
2188 if (w->reschedule_cb) 3622 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3623 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 3624 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3625 periodic_recalc (EV_A_ w);
2192 3626
2193 ANHE_at_cache (periodics [i]); 3627 ANHE_at_cache (periodics [i]);
2194 } 3628 }
2195 3629
2196 reheap (periodics, periodiccnt); 3630 reheap (periodics, periodiccnt);
2197} 3631}
2198#endif 3632#endif
2199 3633
2200/* adjust all timers by a given offset */ 3634/* adjust all timers by a given offset */
2201static void noinline 3635ecb_noinline ecb_cold
3636static void
2202timers_reschedule (EV_P_ ev_tstamp adjust) 3637timers_reschedule (EV_P_ ev_tstamp adjust)
2203{ 3638{
2204 int i; 3639 int i;
2205 3640
2206 for (i = 0; i < timercnt; ++i) 3641 for (i = 0; i < timercnt; ++i)
… …
2215/* also detect if there was a timejump, and act accordingly */ 3650/* also detect if there was a timejump, and act accordingly */
2216inline_speed void 3651inline_speed void
2217time_update (EV_P_ ev_tstamp max_block) 3652time_update (EV_P_ ev_tstamp max_block)
2218{ 3653{
2219#if EV_USE_MONOTONIC 3654#if EV_USE_MONOTONIC
2220 if (expect_true (have_monotonic)) 3655 if (ecb_expect_true (have_monotonic))
2221 { 3656 {
2222 int i; 3657 int i;
2223 ev_tstamp odiff = rtmn_diff; 3658 ev_tstamp odiff = rtmn_diff;
2224 3659
2225 mn_now = get_clock (); 3660 mn_now = get_clock ();
2226 3661
2227 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3662 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2228 /* interpolate in the meantime */ 3663 /* interpolate in the meantime */
2229 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3664 if (ecb_expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2230 { 3665 {
2231 ev_rt_now = rtmn_diff + mn_now; 3666 ev_rt_now = rtmn_diff + mn_now;
2232 return; 3667 return;
2233 } 3668 }
2234 3669
… …
2243 * doesn't hurt either as we only do this on time-jumps or 3678 * doesn't hurt either as we only do this on time-jumps or
2244 * in the unlikely event of having been preempted here. 3679 * in the unlikely event of having been preempted here.
2245 */ 3680 */
2246 for (i = 4; --i; ) 3681 for (i = 4; --i; )
2247 { 3682 {
3683 ev_tstamp diff;
2248 rtmn_diff = ev_rt_now - mn_now; 3684 rtmn_diff = ev_rt_now - mn_now;
2249 3685
3686 diff = odiff - rtmn_diff;
3687
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3688 if (ecb_expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2251 return; /* all is well */ 3689 return; /* all is well */
2252 3690
2253 ev_rt_now = ev_time (); 3691 ev_rt_now = ev_time ();
2254 mn_now = get_clock (); 3692 mn_now = get_clock ();
2255 now_floor = mn_now; 3693 now_floor = mn_now;
… …
2264 else 3702 else
2265#endif 3703#endif
2266 { 3704 {
2267 ev_rt_now = ev_time (); 3705 ev_rt_now = ev_time ();
2268 3706
2269 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3707 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2270 { 3708 {
2271 /* adjust timers. this is easy, as the offset is the same for all of them */ 3709 /* adjust timers. this is easy, as the offset is the same for all of them */
2272 timers_reschedule (EV_A_ ev_rt_now - mn_now); 3710 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2273#if EV_PERIODIC_ENABLE 3711#if EV_PERIODIC_ENABLE
2274 periodics_reschedule (EV_A); 3712 periodics_reschedule (EV_A);
… …
2277 3715
2278 mn_now = ev_rt_now; 3716 mn_now = ev_rt_now;
2279 } 3717 }
2280} 3718}
2281 3719
2282void 3720int
2283ev_run (EV_P_ int flags) 3721ev_run (EV_P_ int flags)
2284{ 3722{
2285#if EV_FEATURE_API 3723#if EV_FEATURE_API
2286 ++loop_depth; 3724 ++loop_depth;
2287#endif 3725#endif
… …
2297#if EV_VERIFY >= 2 3735#if EV_VERIFY >= 2
2298 ev_verify (EV_A); 3736 ev_verify (EV_A);
2299#endif 3737#endif
2300 3738
2301#ifndef _WIN32 3739#ifndef _WIN32
2302 if (expect_false (curpid)) /* penalise the forking check even more */ 3740 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2303 if (expect_false (getpid () != curpid)) 3741 if (ecb_expect_false (getpid () != curpid))
2304 { 3742 {
2305 curpid = getpid (); 3743 curpid = getpid ();
2306 postfork = 1; 3744 postfork = 1;
2307 } 3745 }
2308#endif 3746#endif
2309 3747
2310#if EV_FORK_ENABLE 3748#if EV_FORK_ENABLE
2311 /* we might have forked, so queue fork handlers */ 3749 /* we might have forked, so queue fork handlers */
2312 if (expect_false (postfork)) 3750 if (ecb_expect_false (postfork))
2313 if (forkcnt) 3751 if (forkcnt)
2314 { 3752 {
2315 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3753 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2316 EV_INVOKE_PENDING; 3754 EV_INVOKE_PENDING;
2317 } 3755 }
2318#endif 3756#endif
2319 3757
2320#if EV_PREPARE_ENABLE 3758#if EV_PREPARE_ENABLE
2321 /* queue prepare watchers (and execute them) */ 3759 /* queue prepare watchers (and execute them) */
2322 if (expect_false (preparecnt)) 3760 if (ecb_expect_false (preparecnt))
2323 { 3761 {
2324 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3762 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2325 EV_INVOKE_PENDING; 3763 EV_INVOKE_PENDING;
2326 } 3764 }
2327#endif 3765#endif
2328 3766
2329 if (expect_false (loop_done)) 3767 if (ecb_expect_false (loop_done))
2330 break; 3768 break;
2331 3769
2332 /* we might have forked, so reify kernel state if necessary */ 3770 /* we might have forked, so reify kernel state if necessary */
2333 if (expect_false (postfork)) 3771 if (ecb_expect_false (postfork))
2334 loop_fork (EV_A); 3772 loop_fork (EV_A);
2335 3773
2336 /* update fd-related kernel structures */ 3774 /* update fd-related kernel structures */
2337 fd_reify (EV_A); 3775 fd_reify (EV_A);
2338 3776
… …
2345 ev_tstamp prev_mn_now = mn_now; 3783 ev_tstamp prev_mn_now = mn_now;
2346 3784
2347 /* update time to cancel out callback processing overhead */ 3785 /* update time to cancel out callback processing overhead */
2348 time_update (EV_A_ 1e100); 3786 time_update (EV_A_ 1e100);
2349 3787
3788 /* from now on, we want a pipe-wake-up */
3789 pipe_write_wanted = 1;
3790
3791 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3792
2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3793 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2351 { 3794 {
2352 waittime = MAX_BLOCKTIME; 3795 waittime = MAX_BLOCKTIME;
2353 3796
2354 if (timercnt) 3797 if (timercnt)
2355 { 3798 {
2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3799 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2357 if (waittime > to) waittime = to; 3800 if (waittime > to) waittime = to;
2358 } 3801 }
2359 3802
2360#if EV_PERIODIC_ENABLE 3803#if EV_PERIODIC_ENABLE
2361 if (periodiccnt) 3804 if (periodiccnt)
2362 { 3805 {
2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3806 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2364 if (waittime > to) waittime = to; 3807 if (waittime > to) waittime = to;
2365 } 3808 }
2366#endif 3809#endif
2367 3810
2368 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3811 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime)) 3812 if (ecb_expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime; 3813 waittime = timeout_blocktime;
2371 3814
3815 /* at this point, we NEED to wait, so we have to ensure */
3816 /* to pass a minimum nonzero value to the backend */
3817 if (ecb_expect_false (waittime < backend_mintime))
3818 waittime = backend_mintime;
3819
2372 /* extra check because io_blocktime is commonly 0 */ 3820 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime)) 3821 if (ecb_expect_false (io_blocktime))
2374 { 3822 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3823 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376 3824
2377 if (sleeptime > waittime - backend_fudge) 3825 if (sleeptime > waittime - backend_mintime)
2378 sleeptime = waittime - backend_fudge; 3826 sleeptime = waittime - backend_mintime;
2379 3827
2380 if (expect_true (sleeptime > 0.)) 3828 if (ecb_expect_true (sleeptime > 0.))
2381 { 3829 {
2382 ev_sleep (sleeptime); 3830 ev_sleep (sleeptime);
2383 waittime -= sleeptime; 3831 waittime -= sleeptime;
2384 } 3832 }
2385 } 3833 }
… …
2390#endif 3838#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3839 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime); 3840 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3841 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2394 3842
3843 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3844
3845 ECB_MEMORY_FENCE_ACQUIRE;
3846 if (pipe_write_skipped)
3847 {
3848 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3849 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3850 }
3851
2395 /* update ev_rt_now, do magic */ 3852 /* update ev_rt_now, do magic */
2396 time_update (EV_A_ waittime + sleeptime); 3853 time_update (EV_A_ waittime + sleeptime);
2397 } 3854 }
2398 3855
2399 /* queue pending timers and reschedule them */ 3856 /* queue pending timers and reschedule them */
… …
2407 idle_reify (EV_A); 3864 idle_reify (EV_A);
2408#endif 3865#endif
2409 3866
2410#if EV_CHECK_ENABLE 3867#if EV_CHECK_ENABLE
2411 /* queue check watchers, to be executed first */ 3868 /* queue check watchers, to be executed first */
2412 if (expect_false (checkcnt)) 3869 if (ecb_expect_false (checkcnt))
2413 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3870 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2414#endif 3871#endif
2415 3872
2416 EV_INVOKE_PENDING; 3873 EV_INVOKE_PENDING;
2417 } 3874 }
2418 while (expect_true ( 3875 while (ecb_expect_true (
2419 activecnt 3876 activecnt
2420 && !loop_done 3877 && !loop_done
2421 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) 3878 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2422 )); 3879 ));
2423 3880
… …
2425 loop_done = EVBREAK_CANCEL; 3882 loop_done = EVBREAK_CANCEL;
2426 3883
2427#if EV_FEATURE_API 3884#if EV_FEATURE_API
2428 --loop_depth; 3885 --loop_depth;
2429#endif 3886#endif
2430}
2431 3887
3888 return activecnt;
3889}
3890
2432void 3891void
2433ev_break (EV_P_ int how) 3892ev_break (EV_P_ int how) EV_NOEXCEPT
2434{ 3893{
2435 loop_done = how; 3894 loop_done = how;
2436} 3895}
2437 3896
2438void 3897void
2439ev_ref (EV_P) 3898ev_ref (EV_P) EV_NOEXCEPT
2440{ 3899{
2441 ++activecnt; 3900 ++activecnt;
2442} 3901}
2443 3902
2444void 3903void
2445ev_unref (EV_P) 3904ev_unref (EV_P) EV_NOEXCEPT
2446{ 3905{
2447 --activecnt; 3906 --activecnt;
2448} 3907}
2449 3908
2450void 3909void
2451ev_now_update (EV_P) 3910ev_now_update (EV_P) EV_NOEXCEPT
2452{ 3911{
2453 time_update (EV_A_ 1e100); 3912 time_update (EV_A_ 1e100);
2454} 3913}
2455 3914
2456void 3915void
2457ev_suspend (EV_P) 3916ev_suspend (EV_P) EV_NOEXCEPT
2458{ 3917{
2459 ev_now_update (EV_A); 3918 ev_now_update (EV_A);
2460} 3919}
2461 3920
2462void 3921void
2463ev_resume (EV_P) 3922ev_resume (EV_P) EV_NOEXCEPT
2464{ 3923{
2465 ev_tstamp mn_prev = mn_now; 3924 ev_tstamp mn_prev = mn_now;
2466 3925
2467 ev_now_update (EV_A); 3926 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev); 3927 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2485inline_size void 3944inline_size void
2486wlist_del (WL *head, WL elem) 3945wlist_del (WL *head, WL elem)
2487{ 3946{
2488 while (*head) 3947 while (*head)
2489 { 3948 {
2490 if (expect_true (*head == elem)) 3949 if (ecb_expect_true (*head == elem))
2491 { 3950 {
2492 *head = elem->next; 3951 *head = elem->next;
2493 break; 3952 break;
2494 } 3953 }
2495 3954
… …
2507 w->pending = 0; 3966 w->pending = 0;
2508 } 3967 }
2509} 3968}
2510 3969
2511int 3970int
2512ev_clear_pending (EV_P_ void *w) 3971ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2513{ 3972{
2514 W w_ = (W)w; 3973 W w_ = (W)w;
2515 int pending = w_->pending; 3974 int pending = w_->pending;
2516 3975
2517 if (expect_true (pending)) 3976 if (ecb_expect_true (pending))
2518 { 3977 {
2519 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3978 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2520 p->w = (W)&pending_w; 3979 p->w = (W)&pending_w;
2521 w_->pending = 0; 3980 w_->pending = 0;
2522 return p->events; 3981 return p->events;
… …
2549 w->active = 0; 4008 w->active = 0;
2550} 4009}
2551 4010
2552/*****************************************************************************/ 4011/*****************************************************************************/
2553 4012
2554void noinline 4013ecb_noinline
4014void
2555ev_io_start (EV_P_ ev_io *w) 4015ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2556{ 4016{
2557 int fd = w->fd; 4017 int fd = w->fd;
2558 4018
2559 if (expect_false (ev_is_active (w))) 4019 if (ecb_expect_false (ev_is_active (w)))
2560 return; 4020 return;
2561 4021
2562 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4022 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2563 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4023 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2564 4024
4025#if EV_VERIFY >= 2
4026 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4027#endif
2565 EV_FREQUENT_CHECK; 4028 EV_FREQUENT_CHECK;
2566 4029
2567 ev_start (EV_A_ (W)w, 1); 4030 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4031 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2569 wlist_add (&anfds[fd].head, (WL)w); 4032 wlist_add (&anfds[fd].head, (WL)w);
4033
4034 /* common bug, apparently */
4035 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2570 4036
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4037 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET; 4038 w->events &= ~EV__IOFDSET;
2573 4039
2574 EV_FREQUENT_CHECK; 4040 EV_FREQUENT_CHECK;
2575} 4041}
2576 4042
2577void noinline 4043ecb_noinline
4044void
2578ev_io_stop (EV_P_ ev_io *w) 4045ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2579{ 4046{
2580 clear_pending (EV_A_ (W)w); 4047 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w))) 4048 if (ecb_expect_false (!ev_is_active (w)))
2582 return; 4049 return;
2583 4050
2584 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4051 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2585 4052
4053#if EV_VERIFY >= 2
4054 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4055#endif
2586 EV_FREQUENT_CHECK; 4056 EV_FREQUENT_CHECK;
2587 4057
2588 wlist_del (&anfds[w->fd].head, (WL)w); 4058 wlist_del (&anfds[w->fd].head, (WL)w);
2589 ev_stop (EV_A_ (W)w); 4059 ev_stop (EV_A_ (W)w);
2590 4060
2591 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 4061 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2592 4062
2593 EV_FREQUENT_CHECK; 4063 EV_FREQUENT_CHECK;
2594} 4064}
2595 4065
2596void noinline 4066ecb_noinline
4067void
2597ev_timer_start (EV_P_ ev_timer *w) 4068ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2598{ 4069{
2599 if (expect_false (ev_is_active (w))) 4070 if (ecb_expect_false (ev_is_active (w)))
2600 return; 4071 return;
2601 4072
2602 ev_at (w) += mn_now; 4073 ev_at (w) += mn_now;
2603 4074
2604 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4075 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2605 4076
2606 EV_FREQUENT_CHECK; 4077 EV_FREQUENT_CHECK;
2607 4078
2608 ++timercnt; 4079 ++timercnt;
2609 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4080 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2610 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4081 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2611 ANHE_w (timers [ev_active (w)]) = (WT)w; 4082 ANHE_w (timers [ev_active (w)]) = (WT)w;
2612 ANHE_at_cache (timers [ev_active (w)]); 4083 ANHE_at_cache (timers [ev_active (w)]);
2613 upheap (timers, ev_active (w)); 4084 upheap (timers, ev_active (w));
2614 4085
2615 EV_FREQUENT_CHECK; 4086 EV_FREQUENT_CHECK;
2616 4087
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4088 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618} 4089}
2619 4090
2620void noinline 4091ecb_noinline
4092void
2621ev_timer_stop (EV_P_ ev_timer *w) 4093ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2622{ 4094{
2623 clear_pending (EV_A_ (W)w); 4095 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w))) 4096 if (ecb_expect_false (!ev_is_active (w)))
2625 return; 4097 return;
2626 4098
2627 EV_FREQUENT_CHECK; 4099 EV_FREQUENT_CHECK;
2628 4100
2629 { 4101 {
… …
2631 4103
2632 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4104 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2633 4105
2634 --timercnt; 4106 --timercnt;
2635 4107
2636 if (expect_true (active < timercnt + HEAP0)) 4108 if (ecb_expect_true (active < timercnt + HEAP0))
2637 { 4109 {
2638 timers [active] = timers [timercnt + HEAP0]; 4110 timers [active] = timers [timercnt + HEAP0];
2639 adjustheap (timers, timercnt, active); 4111 adjustheap (timers, timercnt, active);
2640 } 4112 }
2641 } 4113 }
… …
2645 ev_stop (EV_A_ (W)w); 4117 ev_stop (EV_A_ (W)w);
2646 4118
2647 EV_FREQUENT_CHECK; 4119 EV_FREQUENT_CHECK;
2648} 4120}
2649 4121
2650void noinline 4122ecb_noinline
4123void
2651ev_timer_again (EV_P_ ev_timer *w) 4124ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2652{ 4125{
2653 EV_FREQUENT_CHECK; 4126 EV_FREQUENT_CHECK;
4127
4128 clear_pending (EV_A_ (W)w);
2654 4129
2655 if (ev_is_active (w)) 4130 if (ev_is_active (w))
2656 { 4131 {
2657 if (w->repeat) 4132 if (w->repeat)
2658 { 4133 {
… …
2671 4146
2672 EV_FREQUENT_CHECK; 4147 EV_FREQUENT_CHECK;
2673} 4148}
2674 4149
2675ev_tstamp 4150ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w) 4151ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2677{ 4152{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4153 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679} 4154}
2680 4155
2681#if EV_PERIODIC_ENABLE 4156#if EV_PERIODIC_ENABLE
2682void noinline 4157ecb_noinline
4158void
2683ev_periodic_start (EV_P_ ev_periodic *w) 4159ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2684{ 4160{
2685 if (expect_false (ev_is_active (w))) 4161 if (ecb_expect_false (ev_is_active (w)))
2686 return; 4162 return;
2687 4163
2688 if (w->reschedule_cb) 4164 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4165 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2690 else if (w->interval) 4166 else if (w->interval)
2691 { 4167 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4168 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */ 4169 periodic_recalc (EV_A_ w);
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 } 4170 }
2696 else 4171 else
2697 ev_at (w) = w->offset; 4172 ev_at (w) = w->offset;
2698 4173
2699 EV_FREQUENT_CHECK; 4174 EV_FREQUENT_CHECK;
2700 4175
2701 ++periodiccnt; 4176 ++periodiccnt;
2702 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4177 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2703 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4178 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2704 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4179 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2705 ANHE_at_cache (periodics [ev_active (w)]); 4180 ANHE_at_cache (periodics [ev_active (w)]);
2706 upheap (periodics, ev_active (w)); 4181 upheap (periodics, ev_active (w));
2707 4182
2708 EV_FREQUENT_CHECK; 4183 EV_FREQUENT_CHECK;
2709 4184
2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4185 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2711} 4186}
2712 4187
2713void noinline 4188ecb_noinline
4189void
2714ev_periodic_stop (EV_P_ ev_periodic *w) 4190ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2715{ 4191{
2716 clear_pending (EV_A_ (W)w); 4192 clear_pending (EV_A_ (W)w);
2717 if (expect_false (!ev_is_active (w))) 4193 if (ecb_expect_false (!ev_is_active (w)))
2718 return; 4194 return;
2719 4195
2720 EV_FREQUENT_CHECK; 4196 EV_FREQUENT_CHECK;
2721 4197
2722 { 4198 {
… …
2724 4200
2725 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4201 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2726 4202
2727 --periodiccnt; 4203 --periodiccnt;
2728 4204
2729 if (expect_true (active < periodiccnt + HEAP0)) 4205 if (ecb_expect_true (active < periodiccnt + HEAP0))
2730 { 4206 {
2731 periodics [active] = periodics [periodiccnt + HEAP0]; 4207 periodics [active] = periodics [periodiccnt + HEAP0];
2732 adjustheap (periodics, periodiccnt, active); 4208 adjustheap (periodics, periodiccnt, active);
2733 } 4209 }
2734 } 4210 }
… …
2736 ev_stop (EV_A_ (W)w); 4212 ev_stop (EV_A_ (W)w);
2737 4213
2738 EV_FREQUENT_CHECK; 4214 EV_FREQUENT_CHECK;
2739} 4215}
2740 4216
2741void noinline 4217ecb_noinline
4218void
2742ev_periodic_again (EV_P_ ev_periodic *w) 4219ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2743{ 4220{
2744 /* TODO: use adjustheap and recalculation */ 4221 /* TODO: use adjustheap and recalculation */
2745 ev_periodic_stop (EV_A_ w); 4222 ev_periodic_stop (EV_A_ w);
2746 ev_periodic_start (EV_A_ w); 4223 ev_periodic_start (EV_A_ w);
2747} 4224}
… …
2751# define SA_RESTART 0 4228# define SA_RESTART 0
2752#endif 4229#endif
2753 4230
2754#if EV_SIGNAL_ENABLE 4231#if EV_SIGNAL_ENABLE
2755 4232
2756void noinline 4233ecb_noinline
4234void
2757ev_signal_start (EV_P_ ev_signal *w) 4235ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2758{ 4236{
2759 if (expect_false (ev_is_active (w))) 4237 if (ecb_expect_false (ev_is_active (w)))
2760 return; 4238 return;
2761 4239
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4240 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2763 4241
2764#if EV_MULTIPLICITY 4242#if EV_MULTIPLICITY
2765 assert (("libev: a signal must not be attached to two different loops", 4243 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4244 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767 4245
2768 signals [w->signum - 1].loop = EV_A; 4246 signals [w->signum - 1].loop = EV_A;
4247 ECB_MEMORY_FENCE_RELEASE;
2769#endif 4248#endif
2770 4249
2771 EV_FREQUENT_CHECK; 4250 EV_FREQUENT_CHECK;
2772 4251
2773#if EV_USE_SIGNALFD 4252#if EV_USE_SIGNALFD
… …
2820 sa.sa_handler = ev_sighandler; 4299 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 4300 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4301 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 4302 sigaction (w->signum, &sa, 0);
2824 4303
4304 if (origflags & EVFLAG_NOSIGMASK)
4305 {
2825 sigemptyset (&sa.sa_mask); 4306 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 4307 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4308 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4309 }
2828#endif 4310#endif
2829 } 4311 }
2830 4312
2831 EV_FREQUENT_CHECK; 4313 EV_FREQUENT_CHECK;
2832} 4314}
2833 4315
2834void noinline 4316ecb_noinline
4317void
2835ev_signal_stop (EV_P_ ev_signal *w) 4318ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2836{ 4319{
2837 clear_pending (EV_A_ (W)w); 4320 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w))) 4321 if (ecb_expect_false (!ev_is_active (w)))
2839 return; 4322 return;
2840 4323
2841 EV_FREQUENT_CHECK; 4324 EV_FREQUENT_CHECK;
2842 4325
2843 wlist_del (&signals [w->signum - 1].head, (WL)w); 4326 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
2871#endif 4354#endif
2872 4355
2873#if EV_CHILD_ENABLE 4356#if EV_CHILD_ENABLE
2874 4357
2875void 4358void
2876ev_child_start (EV_P_ ev_child *w) 4359ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2877{ 4360{
2878#if EV_MULTIPLICITY 4361#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4362 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif 4363#endif
2881 if (expect_false (ev_is_active (w))) 4364 if (ecb_expect_false (ev_is_active (w)))
2882 return; 4365 return;
2883 4366
2884 EV_FREQUENT_CHECK; 4367 EV_FREQUENT_CHECK;
2885 4368
2886 ev_start (EV_A_ (W)w, 1); 4369 ev_start (EV_A_ (W)w, 1);
… …
2888 4371
2889 EV_FREQUENT_CHECK; 4372 EV_FREQUENT_CHECK;
2890} 4373}
2891 4374
2892void 4375void
2893ev_child_stop (EV_P_ ev_child *w) 4376ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2894{ 4377{
2895 clear_pending (EV_A_ (W)w); 4378 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w))) 4379 if (ecb_expect_false (!ev_is_active (w)))
2897 return; 4380 return;
2898 4381
2899 EV_FREQUENT_CHECK; 4382 EV_FREQUENT_CHECK;
2900 4383
2901 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); 4384 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
… …
2915 4398
2916#define DEF_STAT_INTERVAL 5.0074891 4399#define DEF_STAT_INTERVAL 5.0074891
2917#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4400#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2918#define MIN_STAT_INTERVAL 0.1074891 4401#define MIN_STAT_INTERVAL 0.1074891
2919 4402
2920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4403ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2921 4404
2922#if EV_USE_INOTIFY 4405#if EV_USE_INOTIFY
2923 4406
2924/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4407/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2925# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4408# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2926 4409
2927static void noinline 4410ecb_noinline
4411static void
2928infy_add (EV_P_ ev_stat *w) 4412infy_add (EV_P_ ev_stat *w)
2929{ 4413{
2930 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); 4414 w->wd = inotify_add_watch (fs_fd, w->path,
4415 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4416 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4417 | IN_DONT_FOLLOW | IN_MASK_ADD);
2931 4418
2932 if (w->wd >= 0) 4419 if (w->wd >= 0)
2933 { 4420 {
2934 struct statfs sfs; 4421 struct statfs sfs;
2935 4422
… …
2939 4426
2940 if (!fs_2625) 4427 if (!fs_2625)
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4428 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2942 else if (!statfs (w->path, &sfs) 4429 else if (!statfs (w->path, &sfs)
2943 && (sfs.f_type == 0x1373 /* devfs */ 4430 && (sfs.f_type == 0x1373 /* devfs */
4431 || sfs.f_type == 0x4006 /* fat */
4432 || sfs.f_type == 0x4d44 /* msdos */
2944 || sfs.f_type == 0xEF53 /* ext2/3 */ 4433 || sfs.f_type == 0xEF53 /* ext2/3 */
4434 || sfs.f_type == 0x72b6 /* jffs2 */
4435 || sfs.f_type == 0x858458f6 /* ramfs */
4436 || sfs.f_type == 0x5346544e /* ntfs */
2945 || sfs.f_type == 0x3153464a /* jfs */ 4437 || sfs.f_type == 0x3153464a /* jfs */
4438 || sfs.f_type == 0x9123683e /* btrfs */
2946 || sfs.f_type == 0x52654973 /* reiser3 */ 4439 || sfs.f_type == 0x52654973 /* reiser3 */
2947 || sfs.f_type == 0x01021994 /* tempfs */ 4440 || sfs.f_type == 0x01021994 /* tmpfs */
2948 || sfs.f_type == 0x58465342 /* xfs */)) 4441 || sfs.f_type == 0x58465342 /* xfs */))
2949 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4442 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2950 else 4443 else
2951 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4444 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2952 } 4445 }
… …
2973 if (!pend || pend == path) 4466 if (!pend || pend == path)
2974 break; 4467 break;
2975 4468
2976 *pend = 0; 4469 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask); 4470 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 } 4471 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4472 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 } 4473 }
2981 } 4474 }
2982 4475
2983 if (w->wd >= 0) 4476 if (w->wd >= 0)
… …
2987 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4480 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2988 ev_timer_again (EV_A_ &w->timer); 4481 ev_timer_again (EV_A_ &w->timer);
2989 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4482 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2990} 4483}
2991 4484
2992static void noinline 4485ecb_noinline
4486static void
2993infy_del (EV_P_ ev_stat *w) 4487infy_del (EV_P_ ev_stat *w)
2994{ 4488{
2995 int slot; 4489 int slot;
2996 int wd = w->wd; 4490 int wd = w->wd;
2997 4491
… …
3004 4498
3005 /* remove this watcher, if others are watching it, they will rearm */ 4499 /* remove this watcher, if others are watching it, they will rearm */
3006 inotify_rm_watch (fs_fd, wd); 4500 inotify_rm_watch (fs_fd, wd);
3007} 4501}
3008 4502
3009static void noinline 4503ecb_noinline
4504static void
3010infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4505infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3011{ 4506{
3012 if (slot < 0) 4507 if (slot < 0)
3013 /* overflow, need to check for all hash slots */ 4508 /* overflow, need to check for all hash slots */
3014 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4509 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4545 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 4546 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 4547 }
3053} 4548}
3054 4549
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085}
3086
3087inline_size void 4550inline_size ecb_cold
4551void
3088ev_check_2625 (EV_P) 4552ev_check_2625 (EV_P)
3089{ 4553{
3090 /* kernels < 2.6.25 are borked 4554 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4555 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */ 4556 */
… …
3097} 4561}
3098 4562
3099inline_size int 4563inline_size int
3100infy_newfd (void) 4564infy_newfd (void)
3101{ 4565{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4566#if defined IN_CLOEXEC && defined IN_NONBLOCK
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4567 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0) 4568 if (fd >= 0)
3105 return fd; 4569 return fd;
3106#endif 4570#endif
3107 return inotify_init (); 4571 return inotify_init ();
… …
3182#else 4646#else
3183# define EV_LSTAT(p,b) lstat (p, b) 4647# define EV_LSTAT(p,b) lstat (p, b)
3184#endif 4648#endif
3185 4649
3186void 4650void
3187ev_stat_stat (EV_P_ ev_stat *w) 4651ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3188{ 4652{
3189 if (lstat (w->path, &w->attr) < 0) 4653 if (lstat (w->path, &w->attr) < 0)
3190 w->attr.st_nlink = 0; 4654 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink) 4655 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1; 4656 w->attr.st_nlink = 1;
3193} 4657}
3194 4658
3195static void noinline 4659ecb_noinline
4660static void
3196stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4661stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3197{ 4662{
3198 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4663 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3199 4664
3200 ev_statdata prev = w->attr; 4665 ev_statdata prev = w->attr;
… …
3231 ev_feed_event (EV_A_ w, EV_STAT); 4696 ev_feed_event (EV_A_ w, EV_STAT);
3232 } 4697 }
3233} 4698}
3234 4699
3235void 4700void
3236ev_stat_start (EV_P_ ev_stat *w) 4701ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3237{ 4702{
3238 if (expect_false (ev_is_active (w))) 4703 if (ecb_expect_false (ev_is_active (w)))
3239 return; 4704 return;
3240 4705
3241 ev_stat_stat (EV_A_ w); 4706 ev_stat_stat (EV_A_ w);
3242 4707
3243 if (w->interval < MIN_STAT_INTERVAL && w->interval) 4708 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3262 4727
3263 EV_FREQUENT_CHECK; 4728 EV_FREQUENT_CHECK;
3264} 4729}
3265 4730
3266void 4731void
3267ev_stat_stop (EV_P_ ev_stat *w) 4732ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3268{ 4733{
3269 clear_pending (EV_A_ (W)w); 4734 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w))) 4735 if (ecb_expect_false (!ev_is_active (w)))
3271 return; 4736 return;
3272 4737
3273 EV_FREQUENT_CHECK; 4738 EV_FREQUENT_CHECK;
3274 4739
3275#if EV_USE_INOTIFY 4740#if EV_USE_INOTIFY
… …
3288} 4753}
3289#endif 4754#endif
3290 4755
3291#if EV_IDLE_ENABLE 4756#if EV_IDLE_ENABLE
3292void 4757void
3293ev_idle_start (EV_P_ ev_idle *w) 4758ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3294{ 4759{
3295 if (expect_false (ev_is_active (w))) 4760 if (ecb_expect_false (ev_is_active (w)))
3296 return; 4761 return;
3297 4762
3298 pri_adjust (EV_A_ (W)w); 4763 pri_adjust (EV_A_ (W)w);
3299 4764
3300 EV_FREQUENT_CHECK; 4765 EV_FREQUENT_CHECK;
… …
3303 int active = ++idlecnt [ABSPRI (w)]; 4768 int active = ++idlecnt [ABSPRI (w)];
3304 4769
3305 ++idleall; 4770 ++idleall;
3306 ev_start (EV_A_ (W)w, active); 4771 ev_start (EV_A_ (W)w, active);
3307 4772
3308 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4773 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3309 idles [ABSPRI (w)][active - 1] = w; 4774 idles [ABSPRI (w)][active - 1] = w;
3310 } 4775 }
3311 4776
3312 EV_FREQUENT_CHECK; 4777 EV_FREQUENT_CHECK;
3313} 4778}
3314 4779
3315void 4780void
3316ev_idle_stop (EV_P_ ev_idle *w) 4781ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3317{ 4782{
3318 clear_pending (EV_A_ (W)w); 4783 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w))) 4784 if (ecb_expect_false (!ev_is_active (w)))
3320 return; 4785 return;
3321 4786
3322 EV_FREQUENT_CHECK; 4787 EV_FREQUENT_CHECK;
3323 4788
3324 { 4789 {
… …
3335} 4800}
3336#endif 4801#endif
3337 4802
3338#if EV_PREPARE_ENABLE 4803#if EV_PREPARE_ENABLE
3339void 4804void
3340ev_prepare_start (EV_P_ ev_prepare *w) 4805ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3341{ 4806{
3342 if (expect_false (ev_is_active (w))) 4807 if (ecb_expect_false (ev_is_active (w)))
3343 return; 4808 return;
3344 4809
3345 EV_FREQUENT_CHECK; 4810 EV_FREQUENT_CHECK;
3346 4811
3347 ev_start (EV_A_ (W)w, ++preparecnt); 4812 ev_start (EV_A_ (W)w, ++preparecnt);
3348 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4813 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3349 prepares [preparecnt - 1] = w; 4814 prepares [preparecnt - 1] = w;
3350 4815
3351 EV_FREQUENT_CHECK; 4816 EV_FREQUENT_CHECK;
3352} 4817}
3353 4818
3354void 4819void
3355ev_prepare_stop (EV_P_ ev_prepare *w) 4820ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3356{ 4821{
3357 clear_pending (EV_A_ (W)w); 4822 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w))) 4823 if (ecb_expect_false (!ev_is_active (w)))
3359 return; 4824 return;
3360 4825
3361 EV_FREQUENT_CHECK; 4826 EV_FREQUENT_CHECK;
3362 4827
3363 { 4828 {
… …
3373} 4838}
3374#endif 4839#endif
3375 4840
3376#if EV_CHECK_ENABLE 4841#if EV_CHECK_ENABLE
3377void 4842void
3378ev_check_start (EV_P_ ev_check *w) 4843ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3379{ 4844{
3380 if (expect_false (ev_is_active (w))) 4845 if (ecb_expect_false (ev_is_active (w)))
3381 return; 4846 return;
3382 4847
3383 EV_FREQUENT_CHECK; 4848 EV_FREQUENT_CHECK;
3384 4849
3385 ev_start (EV_A_ (W)w, ++checkcnt); 4850 ev_start (EV_A_ (W)w, ++checkcnt);
3386 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4851 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3387 checks [checkcnt - 1] = w; 4852 checks [checkcnt - 1] = w;
3388 4853
3389 EV_FREQUENT_CHECK; 4854 EV_FREQUENT_CHECK;
3390} 4855}
3391 4856
3392void 4857void
3393ev_check_stop (EV_P_ ev_check *w) 4858ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3394{ 4859{
3395 clear_pending (EV_A_ (W)w); 4860 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w))) 4861 if (ecb_expect_false (!ev_is_active (w)))
3397 return; 4862 return;
3398 4863
3399 EV_FREQUENT_CHECK; 4864 EV_FREQUENT_CHECK;
3400 4865
3401 { 4866 {
… …
3410 EV_FREQUENT_CHECK; 4875 EV_FREQUENT_CHECK;
3411} 4876}
3412#endif 4877#endif
3413 4878
3414#if EV_EMBED_ENABLE 4879#if EV_EMBED_ENABLE
3415void noinline 4880ecb_noinline
4881void
3416ev_embed_sweep (EV_P_ ev_embed *w) 4882ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3417{ 4883{
3418 ev_run (w->other, EVRUN_NOWAIT); 4884 ev_run (w->other, EVRUN_NOWAIT);
3419} 4885}
3420 4886
3421static void 4887static void
… …
3469 ev_idle_stop (EV_A_ idle); 4935 ev_idle_stop (EV_A_ idle);
3470} 4936}
3471#endif 4937#endif
3472 4938
3473void 4939void
3474ev_embed_start (EV_P_ ev_embed *w) 4940ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3475{ 4941{
3476 if (expect_false (ev_is_active (w))) 4942 if (ecb_expect_false (ev_is_active (w)))
3477 return; 4943 return;
3478 4944
3479 { 4945 {
3480 EV_P = w->other; 4946 EV_P = w->other;
3481 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4947 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
… …
3500 4966
3501 EV_FREQUENT_CHECK; 4967 EV_FREQUENT_CHECK;
3502} 4968}
3503 4969
3504void 4970void
3505ev_embed_stop (EV_P_ ev_embed *w) 4971ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3506{ 4972{
3507 clear_pending (EV_A_ (W)w); 4973 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w))) 4974 if (ecb_expect_false (!ev_is_active (w)))
3509 return; 4975 return;
3510 4976
3511 EV_FREQUENT_CHECK; 4977 EV_FREQUENT_CHECK;
3512 4978
3513 ev_io_stop (EV_A_ &w->io); 4979 ev_io_stop (EV_A_ &w->io);
… …
3520} 4986}
3521#endif 4987#endif
3522 4988
3523#if EV_FORK_ENABLE 4989#if EV_FORK_ENABLE
3524void 4990void
3525ev_fork_start (EV_P_ ev_fork *w) 4991ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3526{ 4992{
3527 if (expect_false (ev_is_active (w))) 4993 if (ecb_expect_false (ev_is_active (w)))
3528 return; 4994 return;
3529 4995
3530 EV_FREQUENT_CHECK; 4996 EV_FREQUENT_CHECK;
3531 4997
3532 ev_start (EV_A_ (W)w, ++forkcnt); 4998 ev_start (EV_A_ (W)w, ++forkcnt);
3533 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4999 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3534 forks [forkcnt - 1] = w; 5000 forks [forkcnt - 1] = w;
3535 5001
3536 EV_FREQUENT_CHECK; 5002 EV_FREQUENT_CHECK;
3537} 5003}
3538 5004
3539void 5005void
3540ev_fork_stop (EV_P_ ev_fork *w) 5006ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3541{ 5007{
3542 clear_pending (EV_A_ (W)w); 5008 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w))) 5009 if (ecb_expect_false (!ev_is_active (w)))
3544 return; 5010 return;
3545 5011
3546 EV_FREQUENT_CHECK; 5012 EV_FREQUENT_CHECK;
3547 5013
3548 { 5014 {
… …
3556 5022
3557 EV_FREQUENT_CHECK; 5023 EV_FREQUENT_CHECK;
3558} 5024}
3559#endif 5025#endif
3560 5026
5027#if EV_CLEANUP_ENABLE
5028void
5029ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5030{
5031 if (ecb_expect_false (ev_is_active (w)))
5032 return;
5033
5034 EV_FREQUENT_CHECK;
5035
5036 ev_start (EV_A_ (W)w, ++cleanupcnt);
5037 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5038 cleanups [cleanupcnt - 1] = w;
5039
5040 /* cleanup watchers should never keep a refcount on the loop */
5041 ev_unref (EV_A);
5042 EV_FREQUENT_CHECK;
5043}
5044
5045void
5046ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5047{
5048 clear_pending (EV_A_ (W)w);
5049 if (ecb_expect_false (!ev_is_active (w)))
5050 return;
5051
5052 EV_FREQUENT_CHECK;
5053 ev_ref (EV_A);
5054
5055 {
5056 int active = ev_active (w);
5057
5058 cleanups [active - 1] = cleanups [--cleanupcnt];
5059 ev_active (cleanups [active - 1]) = active;
5060 }
5061
5062 ev_stop (EV_A_ (W)w);
5063
5064 EV_FREQUENT_CHECK;
5065}
5066#endif
5067
3561#if EV_ASYNC_ENABLE 5068#if EV_ASYNC_ENABLE
3562void 5069void
3563ev_async_start (EV_P_ ev_async *w) 5070ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3564{ 5071{
3565 if (expect_false (ev_is_active (w))) 5072 if (ecb_expect_false (ev_is_active (w)))
3566 return; 5073 return;
3567 5074
3568 w->sent = 0; 5075 w->sent = 0;
3569 5076
3570 evpipe_init (EV_A); 5077 evpipe_init (EV_A);
3571 5078
3572 EV_FREQUENT_CHECK; 5079 EV_FREQUENT_CHECK;
3573 5080
3574 ev_start (EV_A_ (W)w, ++asynccnt); 5081 ev_start (EV_A_ (W)w, ++asynccnt);
3575 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5082 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3576 asyncs [asynccnt - 1] = w; 5083 asyncs [asynccnt - 1] = w;
3577 5084
3578 EV_FREQUENT_CHECK; 5085 EV_FREQUENT_CHECK;
3579} 5086}
3580 5087
3581void 5088void
3582ev_async_stop (EV_P_ ev_async *w) 5089ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3583{ 5090{
3584 clear_pending (EV_A_ (W)w); 5091 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w))) 5092 if (ecb_expect_false (!ev_is_active (w)))
3586 return; 5093 return;
3587 5094
3588 EV_FREQUENT_CHECK; 5095 EV_FREQUENT_CHECK;
3589 5096
3590 { 5097 {
… …
3598 5105
3599 EV_FREQUENT_CHECK; 5106 EV_FREQUENT_CHECK;
3600} 5107}
3601 5108
3602void 5109void
3603ev_async_send (EV_P_ ev_async *w) 5110ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3604{ 5111{
3605 w->sent = 1; 5112 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending); 5113 evpipe_write (EV_A_ &async_pending);
3607} 5114}
3608#endif 5115#endif
… …
3645 5152
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5153 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3647} 5154}
3648 5155
3649void 5156void
3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5157ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3651{ 5158{
3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5159 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3653
3654 if (expect_false (!once))
3655 {
3656 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3657 return;
3658 }
3659 5160
3660 once->cb = cb; 5161 once->cb = cb;
3661 once->arg = arg; 5162 once->arg = arg;
3662 5163
3663 ev_init (&once->io, once_cb_io); 5164 ev_init (&once->io, once_cb_io);
… …
3676} 5177}
3677 5178
3678/*****************************************************************************/ 5179/*****************************************************************************/
3679 5180
3680#if EV_WALK_ENABLE 5181#if EV_WALK_ENABLE
5182ecb_cold
3681void 5183void
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5184ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3683{ 5185{
3684 int i, j; 5186 int i, j;
3685 ev_watcher_list *wl, *wn; 5187 ev_watcher_list *wl, *wn;
3686 5188
3687 if (types & (EV_IO | EV_EMBED)) 5189 if (types & (EV_IO | EV_EMBED))
… …
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5232 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif 5233#endif
3732 5234
3733#if EV_IDLE_ENABLE 5235#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE) 5236 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; ) 5237 for (j = NUMPRI; j--; )
3736 for (i = idlecnt [j]; i--; ) 5238 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]); 5239 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif 5240#endif
3739 5241
3740#if EV_FORK_ENABLE 5242#if EV_FORK_ENABLE
… …
3793 5295
3794#if EV_MULTIPLICITY 5296#if EV_MULTIPLICITY
3795 #include "ev_wrap.h" 5297 #include "ev_wrap.h"
3796#endif 5298#endif
3797 5299
3798EV_CPP(})
3799

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