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Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.511 by root, Fri Nov 22 14:32:13 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
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
… …
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
112# endif 118# endif
113 119
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
127# endif
128
129# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
130# ifndef EV_USE_IOURING
131# define EV_USE_IOURING EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_IOURING
135# define EV_USE_IOURING 0
136# endif
137
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 138# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE 139# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 140# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# endif 141# endif
118# else 142# else
… …
153# endif 177# endif
154# else 178# else
155# undef EV_USE_EVENTFD 179# undef EV_USE_EVENTFD
156# define EV_USE_EVENTFD 0 180# define EV_USE_EVENTFD 0
157# endif 181# endif
158
159#endif
160 182
161#include <math.h> 183#endif
184
185/* OS X, in its infinite idiocy, actually HARDCODES
186 * a limit of 1024 into their select. Where people have brains,
187 * OS X engineers apparently have a vacuum. Or maybe they were
188 * ordered to have a vacuum, or they do anything for money.
189 * This might help. Or not.
190 * Note that this must be defined early, as other include files
191 * will rely on this define as well.
192 */
193#define _DARWIN_UNLIMITED_SELECT 1
194
162#include <stdlib.h> 195#include <stdlib.h>
163#include <string.h> 196#include <string.h>
164#include <fcntl.h> 197#include <fcntl.h>
165#include <stddef.h> 198#include <stddef.h>
166 199
… …
178# include EV_H 211# include EV_H
179#else 212#else
180# include "ev.h" 213# include "ev.h"
181#endif 214#endif
182 215
183EV_CPP(extern "C" {) 216#if EV_NO_THREADS
217# undef EV_NO_SMP
218# define EV_NO_SMP 1
219# undef ECB_NO_THREADS
220# define ECB_NO_THREADS 1
221#endif
222#if EV_NO_SMP
223# undef EV_NO_SMP
224# define ECB_NO_SMP 1
225#endif
184 226
185#ifndef _WIN32 227#ifndef _WIN32
186# include <sys/time.h> 228# include <sys/time.h>
187# include <sys/wait.h> 229# include <sys/wait.h>
188# include <unistd.h> 230# include <unistd.h>
189#else 231#else
190# include <io.h> 232# include <io.h>
191# define WIN32_LEAN_AND_MEAN 233# define WIN32_LEAN_AND_MEAN
234# include <winsock2.h>
192# include <windows.h> 235# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 236# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 237# define EV_SELECT_IS_WINSOCKET 1
195# endif 238# endif
196# undef EV_AVOID_STDIO 239# undef EV_AVOID_STDIO
197#endif 240#endif
198 241
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 */ 242/* this block tries to deduce configuration from header-defined symbols and defaults */
208 243
209/* try to deduce the maximum number of signals on this platform */ 244/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 245#if defined EV_NSIG
211/* use what's provided */ 246/* use what's provided */
212#elif defined (NSIG) 247#elif defined NSIG
213# define EV_NSIG (NSIG) 248# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 249#elif defined _NSIG
215# define EV_NSIG (_NSIG) 250# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 251#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 252# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 253#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 254# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 255#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 256# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 257#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 258# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 259#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 260# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 261#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 262# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 263#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 264# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 265#else
231# error "unable to find value for NSIG, please report" 266# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 267#endif
233/* but consider reporting it, too! :) */ 268
234# define EV_NSIG 65 269#ifndef EV_USE_FLOOR
270# define EV_USE_FLOOR 0
235#endif 271#endif
236 272
237#ifndef EV_USE_CLOCK_SYSCALL 273#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 274# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 275# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 276# else
241# define EV_USE_CLOCK_SYSCALL 0 277# define EV_USE_CLOCK_SYSCALL 0
242# endif 278# endif
243#endif 279#endif
244 280
281#if !(_POSIX_TIMERS > 0)
282# ifndef EV_USE_MONOTONIC
283# define EV_USE_MONOTONIC 0
284# endif
285# ifndef EV_USE_REALTIME
286# define EV_USE_REALTIME 0
287# endif
288#endif
289
245#ifndef EV_USE_MONOTONIC 290#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 291# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 292# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 293# else
249# define EV_USE_MONOTONIC 0 294# define EV_USE_MONOTONIC 0
250# endif 295# endif
251#endif 296#endif
… …
288 333
289#ifndef EV_USE_PORT 334#ifndef EV_USE_PORT
290# define EV_USE_PORT 0 335# define EV_USE_PORT 0
291#endif 336#endif
292 337
338#ifndef EV_USE_LINUXAIO
339# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
340# define EV_USE_LINUXAIO 1
341# else
342# define EV_USE_LINUXAIO 0
343# endif
344#endif
345
346#ifndef EV_USE_IOURING
347# if __linux /* later checks might disable again */
348# define EV_USE_IOURING 1
349# else
350# define EV_USE_IOURING 0
351# endif
352#endif
353
293#ifndef EV_USE_INOTIFY 354#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 355# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS 356# define EV_USE_INOTIFY EV_FEATURE_OS
296# else 357# else
297# define EV_USE_INOTIFY 0 358# define EV_USE_INOTIFY 0
… …
338 399
339#ifndef EV_HEAP_CACHE_AT 400#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 401# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 402#endif
342 403
404#ifdef __ANDROID__
405/* supposedly, android doesn't typedef fd_mask */
406# undef EV_USE_SELECT
407# define EV_USE_SELECT 0
408/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
409# undef EV_USE_CLOCK_SYSCALL
410# define EV_USE_CLOCK_SYSCALL 0
411#endif
412
413/* aix's poll.h seems to cause lots of trouble */
414#ifdef _AIX
415/* AIX has a completely broken poll.h header */
416# undef EV_USE_POLL
417# define EV_USE_POLL 0
418#endif
419
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 420/* 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. */ 421/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 422#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 423# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 424# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 425# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 426# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 427# define EV_USE_MONOTONIC 1
428# define EV_NEED_SYSCALL 1
351# else 429# else
352# undef EV_USE_CLOCK_SYSCALL 430# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0 431# define EV_USE_CLOCK_SYSCALL 0
354# endif 432# endif
355#endif 433#endif
356 434
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 435/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 436
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 437#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 438# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 439# define EV_USE_MONOTONIC 0
368#endif 440#endif
369 441
… …
375#if !EV_STAT_ENABLE 447#if !EV_STAT_ENABLE
376# undef EV_USE_INOTIFY 448# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 449# define EV_USE_INOTIFY 0
378#endif 450#endif
379 451
452#if __linux && EV_USE_IOURING
453# include <linux/fs.h>
454# ifndef RWF_SYNC
455# undef EV_USE_IOURING
456# define EV_USE_IOURING 0
457# endif
458#endif
459
380#if !EV_USE_NANOSLEEP 460#if !EV_USE_NANOSLEEP
381/* hp-ux has it in sys/time.h, which we unconditionally include above */ 461/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux) 462# if !defined _WIN32 && !defined __hpux
383# include <sys/select.h> 463# include <sys/select.h>
464# endif
465#endif
466
467#if EV_USE_LINUXAIO
468# include <sys/syscall.h>
469# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
470# define EV_NEED_SYSCALL 1
471# else
472# undef EV_USE_LINUXAIO
473# define EV_USE_LINUXAIO 0
474# endif
475#endif
476
477#if EV_USE_IOURING
478# include <sys/syscall.h>
479# if !SYS_io_uring_setup && __linux && !__alpha
480# define SYS_io_uring_setup 425
481# define SYS_io_uring_enter 426
482# define SYS_io_uring_wregister 427
483# endif
484# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
485# define EV_NEED_SYSCALL 1
486# else
487# undef EV_USE_IOURING
488# define EV_USE_IOURING 0
384# endif 489# endif
385#endif 490#endif
386 491
387#if EV_USE_INOTIFY 492#if EV_USE_INOTIFY
388# include <sys/statfs.h> 493# include <sys/statfs.h>
… …
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 495/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 496# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 497# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 498# define EV_USE_INOTIFY 0
394# endif 499# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 500#endif
400 501
401#if EV_USE_EVENTFD 502#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 503/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 504# include <stdint.h>
… …
434 uint32_t ssi_signo; 535 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)]; 536 char pad[128 - sizeof (uint32_t)];
436}; 537};
437#endif 538#endif
438 539
439/**/ 540/*****************************************************************************/
440 541
441#if EV_VERIFY >= 3 542#if EV_VERIFY >= 3
442# define EV_FREQUENT_CHECK ev_verify (EV_A) 543# define EV_FREQUENT_CHECK ev_verify (EV_A)
443#else 544#else
444# define EV_FREQUENT_CHECK do { } while (0) 545# define EV_FREQUENT_CHECK do { } while (0)
445#endif 546#endif
446 547
447/* 548/*
448 * This is used to avoid floating point rounding problems. 549 * 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. 550 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 551 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 552#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
553/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 554
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 555#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) */ 556#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 557
558/* find a portable timestamp that is "always" in the future but fits into time_t.
559 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
560 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
561#define EV_TSTAMP_HUGE \
562 (sizeof (time_t) >= 8 ? 10000000000000. \
563 : 0 < (time_t)4294967295 ? 4294967295. \
564 : 2147483647.) \
565
566#ifndef EV_TS_CONST
567# define EV_TS_CONST(nv) nv
568# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
569# define EV_TS_FROM_USEC(us) us * 1e-6
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 570# 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) 571# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
572# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
573# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
574#endif
462 575
576/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
577/* ECB.H BEGIN */
578/*
579 * libecb - http://software.schmorp.de/pkg/libecb
580 *
581 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
582 * Copyright (©) 2011 Emanuele Giaquinta
583 * All rights reserved.
584 *
585 * Redistribution and use in source and binary forms, with or without modifica-
586 * tion, are permitted provided that the following conditions are met:
587 *
588 * 1. Redistributions of source code must retain the above copyright notice,
589 * this list of conditions and the following disclaimer.
590 *
591 * 2. Redistributions in binary form must reproduce the above copyright
592 * notice, this list of conditions and the following disclaimer in the
593 * documentation and/or other materials provided with the distribution.
594 *
595 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
596 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
597 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
598 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
599 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
600 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
601 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
602 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
603 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
604 * OF THE POSSIBILITY OF SUCH DAMAGE.
605 *
606 * Alternatively, the contents of this file may be used under the terms of
607 * the GNU General Public License ("GPL") version 2 or any later version,
608 * in which case the provisions of the GPL are applicable instead of
609 * the above. If you wish to allow the use of your version of this file
610 * only under the terms of the GPL and not to allow others to use your
611 * version of this file under the BSD license, indicate your decision
612 * by deleting the provisions above and replace them with the notice
613 * and other provisions required by the GPL. If you do not delete the
614 * provisions above, a recipient may use your version of this file under
615 * either the BSD or the GPL.
616 */
617
618#ifndef ECB_H
619#define ECB_H
620
621/* 16 bits major, 16 bits minor */
622#define ECB_VERSION 0x00010006
623
624#ifdef _WIN32
625 typedef signed char int8_t;
626 typedef unsigned char uint8_t;
627 typedef signed short int16_t;
628 typedef unsigned short uint16_t;
629 typedef signed int int32_t;
630 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 631 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 632 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 633 typedef unsigned long long uint64_t;
634 #else /* _MSC_VER || __BORLANDC__ */
635 typedef signed __int64 int64_t;
636 typedef unsigned __int64 uint64_t;
637 #endif
638 #ifdef _WIN64
639 #define ECB_PTRSIZE 8
640 typedef uint64_t uintptr_t;
641 typedef int64_t intptr_t;
642 #else
643 #define ECB_PTRSIZE 4
644 typedef uint32_t uintptr_t;
645 typedef int32_t intptr_t;
646 #endif
466#else 647#else
467# define expect(expr,value) (expr) 648 #include <inttypes.h>
468# define noinline 649 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 650 #define ECB_PTRSIZE 8
470# define inline 651 #else
652 #define ECB_PTRSIZE 4
653 #endif
471# endif 654#endif
655
656#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
657#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
658
659/* work around x32 idiocy by defining proper macros */
660#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
661 #if _ILP32
662 #define ECB_AMD64_X32 1
663 #else
664 #define ECB_AMD64 1
472#endif 665 #endif
666#endif
473 667
668/* many compilers define _GNUC_ to some versions but then only implement
669 * what their idiot authors think are the "more important" extensions,
670 * causing enormous grief in return for some better fake benchmark numbers.
671 * or so.
672 * we try to detect these and simply assume they are not gcc - if they have
673 * an issue with that they should have done it right in the first place.
674 */
675#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
676 #define ECB_GCC_VERSION(major,minor) 0
677#else
678 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
679#endif
680
681#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
682
683#if __clang__ && defined __has_builtin
684 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
685#else
686 #define ECB_CLANG_BUILTIN(x) 0
687#endif
688
689#if __clang__ && defined __has_extension
690 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
691#else
692 #define ECB_CLANG_EXTENSION(x) 0
693#endif
694
695#define ECB_CPP (__cplusplus+0)
696#define ECB_CPP11 (__cplusplus >= 201103L)
697#define ECB_CPP14 (__cplusplus >= 201402L)
698#define ECB_CPP17 (__cplusplus >= 201703L)
699
700#if ECB_CPP
701 #define ECB_C 0
702 #define ECB_STDC_VERSION 0
703#else
704 #define ECB_C 1
705 #define ECB_STDC_VERSION __STDC_VERSION__
706#endif
707
708#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
709#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
710#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
711
712#if ECB_CPP
713 #define ECB_EXTERN_C extern "C"
714 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
715 #define ECB_EXTERN_C_END }
716#else
717 #define ECB_EXTERN_C extern
718 #define ECB_EXTERN_C_BEG
719 #define ECB_EXTERN_C_END
720#endif
721
722/*****************************************************************************/
723
724/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
725/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
726
727#if ECB_NO_THREADS
728 #define ECB_NO_SMP 1
729#endif
730
731#if ECB_NO_SMP
732 #define ECB_MEMORY_FENCE do { } while (0)
733#endif
734
735/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
736#if __xlC__ && ECB_CPP
737 #include <builtins.h>
738#endif
739
740#if 1400 <= _MSC_VER
741 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
742#endif
743
744#ifndef ECB_MEMORY_FENCE
745 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
746 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
747 #if __i386 || __i386__
748 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
749 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
750 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
751 #elif ECB_GCC_AMD64
752 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
753 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
754 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
755 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
756 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
757 #elif defined __ARM_ARCH_2__ \
758 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
759 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
760 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
761 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
762 || defined __ARM_ARCH_5TEJ__
763 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
764 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
765 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
766 || defined __ARM_ARCH_6T2__
767 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
768 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
769 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
770 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
771 #elif __aarch64__
772 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
773 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
774 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
775 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
776 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
777 #elif defined __s390__ || defined __s390x__
778 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
779 #elif defined __mips__
780 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
781 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
782 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
783 #elif defined __alpha__
784 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
785 #elif defined __hppa__
786 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
787 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
788 #elif defined __ia64__
789 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
790 #elif defined __m68k__
791 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
792 #elif defined __m88k__
793 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
794 #elif defined __sh__
795 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
796 #endif
797 #endif
798#endif
799
800#ifndef ECB_MEMORY_FENCE
801 #if ECB_GCC_VERSION(4,7)
802 /* see comment below (stdatomic.h) about the C11 memory model. */
803 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
804 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
805 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
806 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
807
808 #elif ECB_CLANG_EXTENSION(c_atomic)
809 /* see comment below (stdatomic.h) about the C11 memory model. */
810 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
811 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
812 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
813 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
814
815 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
816 #define ECB_MEMORY_FENCE __sync_synchronize ()
817 #elif _MSC_VER >= 1500 /* VC++ 2008 */
818 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
819 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
820 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
821 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
822 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
823 #elif _MSC_VER >= 1400 /* VC++ 2005 */
824 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
825 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
826 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
827 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
828 #elif defined _WIN32
829 #include <WinNT.h>
830 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
831 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
832 #include <mbarrier.h>
833 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
834 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
835 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
836 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
837 #elif __xlC__
838 #define ECB_MEMORY_FENCE __sync ()
839 #endif
840#endif
841
842#ifndef ECB_MEMORY_FENCE
843 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
844 /* we assume that these memory fences work on all variables/all memory accesses, */
845 /* not just C11 atomics and atomic accesses */
846 #include <stdatomic.h>
847 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
848 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
849 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
850 #endif
851#endif
852
853#ifndef ECB_MEMORY_FENCE
854 #if !ECB_AVOID_PTHREADS
855 /*
856 * if you get undefined symbol references to pthread_mutex_lock,
857 * or failure to find pthread.h, then you should implement
858 * the ECB_MEMORY_FENCE operations for your cpu/compiler
859 * OR provide pthread.h and link against the posix thread library
860 * of your system.
861 */
862 #include <pthread.h>
863 #define ECB_NEEDS_PTHREADS 1
864 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
865
866 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
867 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
868 #endif
869#endif
870
871#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
872 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
873#endif
874
875#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
876 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
877#endif
878
879#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
880 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
881#endif
882
883/*****************************************************************************/
884
885#if ECB_CPP
886 #define ecb_inline static inline
887#elif ECB_GCC_VERSION(2,5)
888 #define ecb_inline static __inline__
889#elif ECB_C99
890 #define ecb_inline static inline
891#else
892 #define ecb_inline static
893#endif
894
895#if ECB_GCC_VERSION(3,3)
896 #define ecb_restrict __restrict__
897#elif ECB_C99
898 #define ecb_restrict restrict
899#else
900 #define ecb_restrict
901#endif
902
903typedef int ecb_bool;
904
905#define ECB_CONCAT_(a, b) a ## b
906#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
907#define ECB_STRINGIFY_(a) # a
908#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
909#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
910
911#define ecb_function_ ecb_inline
912
913#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
914 #define ecb_attribute(attrlist) __attribute__ (attrlist)
915#else
916 #define ecb_attribute(attrlist)
917#endif
918
919#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
920 #define ecb_is_constant(expr) __builtin_constant_p (expr)
921#else
922 /* possible C11 impl for integral types
923 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
924 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
925
926 #define ecb_is_constant(expr) 0
927#endif
928
929#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
930 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
931#else
932 #define ecb_expect(expr,value) (expr)
933#endif
934
935#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
936 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
937#else
938 #define ecb_prefetch(addr,rw,locality)
939#endif
940
941/* no emulation for ecb_decltype */
942#if ECB_CPP11
943 // older implementations might have problems with decltype(x)::type, work around it
944 template<class T> struct ecb_decltype_t { typedef T type; };
945 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
946#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
947 #define ecb_decltype(x) __typeof__ (x)
948#endif
949
950#if _MSC_VER >= 1300
951 #define ecb_deprecated __declspec (deprecated)
952#else
953 #define ecb_deprecated ecb_attribute ((__deprecated__))
954#endif
955
956#if _MSC_VER >= 1500
957 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
958#elif ECB_GCC_VERSION(4,5)
959 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
960#else
961 #define ecb_deprecated_message(msg) ecb_deprecated
962#endif
963
964#if _MSC_VER >= 1400
965 #define ecb_noinline __declspec (noinline)
966#else
967 #define ecb_noinline ecb_attribute ((__noinline__))
968#endif
969
970#define ecb_unused ecb_attribute ((__unused__))
971#define ecb_const ecb_attribute ((__const__))
972#define ecb_pure ecb_attribute ((__pure__))
973
974#if ECB_C11 || __IBMC_NORETURN
975 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
976 #define ecb_noreturn _Noreturn
977#elif ECB_CPP11
978 #define ecb_noreturn [[noreturn]]
979#elif _MSC_VER >= 1200
980 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
981 #define ecb_noreturn __declspec (noreturn)
982#else
983 #define ecb_noreturn ecb_attribute ((__noreturn__))
984#endif
985
986#if ECB_GCC_VERSION(4,3)
987 #define ecb_artificial ecb_attribute ((__artificial__))
988 #define ecb_hot ecb_attribute ((__hot__))
989 #define ecb_cold ecb_attribute ((__cold__))
990#else
991 #define ecb_artificial
992 #define ecb_hot
993 #define ecb_cold
994#endif
995
996/* put around conditional expressions if you are very sure that the */
997/* expression is mostly true or mostly false. note that these return */
998/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 999#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 1000#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
1001/* for compatibility to the rest of the world */
1002#define ecb_likely(expr) ecb_expect_true (expr)
1003#define ecb_unlikely(expr) ecb_expect_false (expr)
1004
1005/* count trailing zero bits and count # of one bits */
1006#if ECB_GCC_VERSION(3,4) \
1007 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1008 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1009 && ECB_CLANG_BUILTIN(__builtin_popcount))
1010 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1011 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1012 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1013 #define ecb_ctz32(x) __builtin_ctz (x)
1014 #define ecb_ctz64(x) __builtin_ctzll (x)
1015 #define ecb_popcount32(x) __builtin_popcount (x)
1016 /* no popcountll */
1017#else
1018 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1019 ecb_function_ ecb_const int
1020 ecb_ctz32 (uint32_t x)
1021 {
1022#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1023 unsigned long r;
1024 _BitScanForward (&r, x);
1025 return (int)r;
1026#else
1027 int r = 0;
1028
1029 x &= ~x + 1; /* this isolates the lowest bit */
1030
1031#if ECB_branchless_on_i386
1032 r += !!(x & 0xaaaaaaaa) << 0;
1033 r += !!(x & 0xcccccccc) << 1;
1034 r += !!(x & 0xf0f0f0f0) << 2;
1035 r += !!(x & 0xff00ff00) << 3;
1036 r += !!(x & 0xffff0000) << 4;
1037#else
1038 if (x & 0xaaaaaaaa) r += 1;
1039 if (x & 0xcccccccc) r += 2;
1040 if (x & 0xf0f0f0f0) r += 4;
1041 if (x & 0xff00ff00) r += 8;
1042 if (x & 0xffff0000) r += 16;
1043#endif
1044
1045 return r;
1046#endif
1047 }
1048
1049 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1050 ecb_function_ ecb_const int
1051 ecb_ctz64 (uint64_t x)
1052 {
1053#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1054 unsigned long r;
1055 _BitScanForward64 (&r, x);
1056 return (int)r;
1057#else
1058 int shift = x & 0xffffffff ? 0 : 32;
1059 return ecb_ctz32 (x >> shift) + shift;
1060#endif
1061 }
1062
1063 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1064 ecb_function_ ecb_const int
1065 ecb_popcount32 (uint32_t x)
1066 {
1067 x -= (x >> 1) & 0x55555555;
1068 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1069 x = ((x >> 4) + x) & 0x0f0f0f0f;
1070 x *= 0x01010101;
1071
1072 return x >> 24;
1073 }
1074
1075 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1076 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1077 {
1078#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1079 unsigned long r;
1080 _BitScanReverse (&r, x);
1081 return (int)r;
1082#else
1083 int r = 0;
1084
1085 if (x >> 16) { x >>= 16; r += 16; }
1086 if (x >> 8) { x >>= 8; r += 8; }
1087 if (x >> 4) { x >>= 4; r += 4; }
1088 if (x >> 2) { x >>= 2; r += 2; }
1089 if (x >> 1) { r += 1; }
1090
1091 return r;
1092#endif
1093 }
1094
1095 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1096 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1097 {
1098#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1099 unsigned long r;
1100 _BitScanReverse64 (&r, x);
1101 return (int)r;
1102#else
1103 int r = 0;
1104
1105 if (x >> 32) { x >>= 32; r += 32; }
1106
1107 return r + ecb_ld32 (x);
1108#endif
1109 }
1110#endif
1111
1112ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1113ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1114ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1115ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1116
1117ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1118ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1119{
1120 return ( (x * 0x0802U & 0x22110U)
1121 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1122}
1123
1124ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1125ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1126{
1127 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1128 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1129 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1130 x = ( x >> 8 ) | ( x << 8);
1131
1132 return x;
1133}
1134
1135ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1136ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1137{
1138 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1139 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1140 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1141 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1142 x = ( x >> 16 ) | ( x << 16);
1143
1144 return x;
1145}
1146
1147/* popcount64 is only available on 64 bit cpus as gcc builtin */
1148/* so for this version we are lazy */
1149ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1150ecb_function_ ecb_const int
1151ecb_popcount64 (uint64_t x)
1152{
1153 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1154}
1155
1156ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1157ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1158ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1159ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1160ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1161ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1162ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1163ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1164
1165ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1166ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1167ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1168ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1169ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1170ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1171ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1172ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1173
1174#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1175 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1176 #define ecb_bswap16(x) __builtin_bswap16 (x)
1177 #else
1178 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1179 #endif
1180 #define ecb_bswap32(x) __builtin_bswap32 (x)
1181 #define ecb_bswap64(x) __builtin_bswap64 (x)
1182#elif _MSC_VER
1183 #include <stdlib.h>
1184 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1185 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1186 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1187#else
1188 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1189 ecb_function_ ecb_const uint16_t
1190 ecb_bswap16 (uint16_t x)
1191 {
1192 return ecb_rotl16 (x, 8);
1193 }
1194
1195 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1196 ecb_function_ ecb_const uint32_t
1197 ecb_bswap32 (uint32_t x)
1198 {
1199 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1200 }
1201
1202 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1203 ecb_function_ ecb_const uint64_t
1204 ecb_bswap64 (uint64_t x)
1205 {
1206 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1207 }
1208#endif
1209
1210#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1211 #define ecb_unreachable() __builtin_unreachable ()
1212#else
1213 /* this seems to work fine, but gcc always emits a warning for it :/ */
1214 ecb_inline ecb_noreturn void ecb_unreachable (void);
1215 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1216#endif
1217
1218/* try to tell the compiler that some condition is definitely true */
1219#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1220
1221ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1222ecb_inline ecb_const uint32_t
1223ecb_byteorder_helper (void)
1224{
1225 /* the union code still generates code under pressure in gcc, */
1226 /* but less than using pointers, and always seems to */
1227 /* successfully return a constant. */
1228 /* the reason why we have this horrible preprocessor mess */
1229 /* is to avoid it in all cases, at least on common architectures */
1230 /* or when using a recent enough gcc version (>= 4.6) */
1231#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1232 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1233 #define ECB_LITTLE_ENDIAN 1
1234 return 0x44332211;
1235#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1236 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1237 #define ECB_BIG_ENDIAN 1
1238 return 0x11223344;
1239#else
1240 union
1241 {
1242 uint8_t c[4];
1243 uint32_t u;
1244 } u = { 0x11, 0x22, 0x33, 0x44 };
1245 return u.u;
1246#endif
1247}
1248
1249ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1250ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1251ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1252ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1253
1254#if ECB_GCC_VERSION(3,0) || ECB_C99
1255 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1256#else
1257 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1258#endif
1259
1260#if ECB_CPP
1261 template<typename T>
1262 static inline T ecb_div_rd (T val, T div)
1263 {
1264 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1265 }
1266 template<typename T>
1267 static inline T ecb_div_ru (T val, T div)
1268 {
1269 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1270 }
1271#else
1272 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1273 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1274#endif
1275
1276#if ecb_cplusplus_does_not_suck
1277 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1278 template<typename T, int N>
1279 static inline int ecb_array_length (const T (&arr)[N])
1280 {
1281 return N;
1282 }
1283#else
1284 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1285#endif
1286
1287ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1288ecb_function_ ecb_const uint32_t
1289ecb_binary16_to_binary32 (uint32_t x)
1290{
1291 unsigned int s = (x & 0x8000) << (31 - 15);
1292 int e = (x >> 10) & 0x001f;
1293 unsigned int m = x & 0x03ff;
1294
1295 if (ecb_expect_false (e == 31))
1296 /* infinity or NaN */
1297 e = 255 - (127 - 15);
1298 else if (ecb_expect_false (!e))
1299 {
1300 if (ecb_expect_true (!m))
1301 /* zero, handled by code below by forcing e to 0 */
1302 e = 0 - (127 - 15);
1303 else
1304 {
1305 /* subnormal, renormalise */
1306 unsigned int s = 10 - ecb_ld32 (m);
1307
1308 m = (m << s) & 0x3ff; /* mask implicit bit */
1309 e -= s - 1;
1310 }
1311 }
1312
1313 /* e and m now are normalised, or zero, (or inf or nan) */
1314 e += 127 - 15;
1315
1316 return s | (e << 23) | (m << (23 - 10));
1317}
1318
1319ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1320ecb_function_ ecb_const uint16_t
1321ecb_binary32_to_binary16 (uint32_t x)
1322{
1323 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1324 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1325 unsigned int m = x & 0x007fffff;
1326
1327 x &= 0x7fffffff;
1328
1329 /* if it's within range of binary16 normals, use fast path */
1330 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1331 {
1332 /* mantissa round-to-even */
1333 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1334
1335 /* handle overflow */
1336 if (ecb_expect_false (m >= 0x00800000))
1337 {
1338 m >>= 1;
1339 e += 1;
1340 }
1341
1342 return s | (e << 10) | (m >> (23 - 10));
1343 }
1344
1345 /* handle large numbers and infinity */
1346 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1347 return s | 0x7c00;
1348
1349 /* handle zero, subnormals and small numbers */
1350 if (ecb_expect_true (x < 0x38800000))
1351 {
1352 /* zero */
1353 if (ecb_expect_true (!x))
1354 return s;
1355
1356 /* handle subnormals */
1357
1358 /* too small, will be zero */
1359 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1360 return s;
1361
1362 m |= 0x00800000; /* make implicit bit explicit */
1363
1364 /* very tricky - we need to round to the nearest e (+10) bit value */
1365 {
1366 unsigned int bits = 14 - e;
1367 unsigned int half = (1 << (bits - 1)) - 1;
1368 unsigned int even = (m >> bits) & 1;
1369
1370 /* if this overflows, we will end up with a normalised number */
1371 m = (m + half + even) >> bits;
1372 }
1373
1374 return s | m;
1375 }
1376
1377 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1378 m >>= 13;
1379
1380 return s | 0x7c00 | m | !m;
1381}
1382
1383/*******************************************************************************/
1384/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1385
1386/* basically, everything uses "ieee pure-endian" floating point numbers */
1387/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1388#if 0 \
1389 || __i386 || __i386__ \
1390 || ECB_GCC_AMD64 \
1391 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1392 || defined __s390__ || defined __s390x__ \
1393 || defined __mips__ \
1394 || defined __alpha__ \
1395 || defined __hppa__ \
1396 || defined __ia64__ \
1397 || defined __m68k__ \
1398 || defined __m88k__ \
1399 || defined __sh__ \
1400 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1401 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1402 || defined __aarch64__
1403 #define ECB_STDFP 1
1404 #include <string.h> /* for memcpy */
1405#else
1406 #define ECB_STDFP 0
1407#endif
1408
1409#ifndef ECB_NO_LIBM
1410
1411 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1412
1413 /* only the oldest of old doesn't have this one. solaris. */
1414 #ifdef INFINITY
1415 #define ECB_INFINITY INFINITY
1416 #else
1417 #define ECB_INFINITY HUGE_VAL
1418 #endif
1419
1420 #ifdef NAN
1421 #define ECB_NAN NAN
1422 #else
1423 #define ECB_NAN ECB_INFINITY
1424 #endif
1425
1426 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1427 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1428 #define ecb_frexpf(x,e) frexpf ((x), (e))
1429 #else
1430 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1431 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1432 #endif
1433
1434 /* convert a float to ieee single/binary32 */
1435 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1436 ecb_function_ ecb_const uint32_t
1437 ecb_float_to_binary32 (float x)
1438 {
1439 uint32_t r;
1440
1441 #if ECB_STDFP
1442 memcpy (&r, &x, 4);
1443 #else
1444 /* slow emulation, works for anything but -0 */
1445 uint32_t m;
1446 int e;
1447
1448 if (x == 0e0f ) return 0x00000000U;
1449 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1450 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1451 if (x != x ) return 0x7fbfffffU;
1452
1453 m = ecb_frexpf (x, &e) * 0x1000000U;
1454
1455 r = m & 0x80000000U;
1456
1457 if (r)
1458 m = -m;
1459
1460 if (e <= -126)
1461 {
1462 m &= 0xffffffU;
1463 m >>= (-125 - e);
1464 e = -126;
1465 }
1466
1467 r |= (e + 126) << 23;
1468 r |= m & 0x7fffffU;
1469 #endif
1470
1471 return r;
1472 }
1473
1474 /* converts an ieee single/binary32 to a float */
1475 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1476 ecb_function_ ecb_const float
1477 ecb_binary32_to_float (uint32_t x)
1478 {
1479 float r;
1480
1481 #if ECB_STDFP
1482 memcpy (&r, &x, 4);
1483 #else
1484 /* emulation, only works for normals and subnormals and +0 */
1485 int neg = x >> 31;
1486 int e = (x >> 23) & 0xffU;
1487
1488 x &= 0x7fffffU;
1489
1490 if (e)
1491 x |= 0x800000U;
1492 else
1493 e = 1;
1494
1495 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1496 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1497
1498 r = neg ? -r : r;
1499 #endif
1500
1501 return r;
1502 }
1503
1504 /* convert a double to ieee double/binary64 */
1505 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1506 ecb_function_ ecb_const uint64_t
1507 ecb_double_to_binary64 (double x)
1508 {
1509 uint64_t r;
1510
1511 #if ECB_STDFP
1512 memcpy (&r, &x, 8);
1513 #else
1514 /* slow emulation, works for anything but -0 */
1515 uint64_t m;
1516 int e;
1517
1518 if (x == 0e0 ) return 0x0000000000000000U;
1519 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1520 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1521 if (x != x ) return 0X7ff7ffffffffffffU;
1522
1523 m = frexp (x, &e) * 0x20000000000000U;
1524
1525 r = m & 0x8000000000000000;;
1526
1527 if (r)
1528 m = -m;
1529
1530 if (e <= -1022)
1531 {
1532 m &= 0x1fffffffffffffU;
1533 m >>= (-1021 - e);
1534 e = -1022;
1535 }
1536
1537 r |= ((uint64_t)(e + 1022)) << 52;
1538 r |= m & 0xfffffffffffffU;
1539 #endif
1540
1541 return r;
1542 }
1543
1544 /* converts an ieee double/binary64 to a double */
1545 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1546 ecb_function_ ecb_const double
1547 ecb_binary64_to_double (uint64_t x)
1548 {
1549 double r;
1550
1551 #if ECB_STDFP
1552 memcpy (&r, &x, 8);
1553 #else
1554 /* emulation, only works for normals and subnormals and +0 */
1555 int neg = x >> 63;
1556 int e = (x >> 52) & 0x7ffU;
1557
1558 x &= 0xfffffffffffffU;
1559
1560 if (e)
1561 x |= 0x10000000000000U;
1562 else
1563 e = 1;
1564
1565 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1566 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1567
1568 r = neg ? -r : r;
1569 #endif
1570
1571 return r;
1572 }
1573
1574 /* convert a float to ieee half/binary16 */
1575 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1576 ecb_function_ ecb_const uint16_t
1577 ecb_float_to_binary16 (float x)
1578 {
1579 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1580 }
1581
1582 /* convert an ieee half/binary16 to float */
1583 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1584 ecb_function_ ecb_const float
1585 ecb_binary16_to_float (uint16_t x)
1586 {
1587 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1588 }
1589
1590#endif
1591
1592#endif
1593
1594/* ECB.H END */
1595
1596#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1597/* if your architecture doesn't need memory fences, e.g. because it is
1598 * single-cpu/core, or if you use libev in a project that doesn't use libev
1599 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1600 * libev, in which cases the memory fences become nops.
1601 * alternatively, you can remove this #error and link against libpthread,
1602 * which will then provide the memory fences.
1603 */
1604# error "memory fences not defined for your architecture, please report"
1605#endif
1606
1607#ifndef ECB_MEMORY_FENCE
1608# define ECB_MEMORY_FENCE do { } while (0)
1609# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1610# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1611#endif
1612
476#define inline_size static inline 1613#define inline_size ecb_inline
477 1614
478#if EV_FEATURE_CODE 1615#if EV_FEATURE_CODE
479# define inline_speed static inline 1616# define inline_speed ecb_inline
480#else 1617#else
481# define inline_speed static noinline 1618# define inline_speed ecb_noinline static
482#endif 1619#endif
1620
1621/*****************************************************************************/
1622/* raw syscall wrappers */
1623
1624#if EV_NEED_SYSCALL
1625
1626#include <sys/syscall.h>
1627
1628/*
1629 * define some syscall wrappers for common architectures
1630 * this is mostly for nice looks during debugging, not performance.
1631 * our syscalls return < 0, not == -1, on error. which is good
1632 * enough for linux aio.
1633 * TODO: arm is also common nowadays, maybe even mips and x86
1634 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1635 */
1636#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__
1637 /* the costly errno access probably kills this for size optimisation */
1638
1639 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1640 ({ \
1641 long res; \
1642 register unsigned long r6 __asm__ ("r9" ); \
1643 register unsigned long r5 __asm__ ("r8" ); \
1644 register unsigned long r4 __asm__ ("r10"); \
1645 register unsigned long r3 __asm__ ("rdx"); \
1646 register unsigned long r2 __asm__ ("rsi"); \
1647 register unsigned long r1 __asm__ ("rdi"); \
1648 if (narg >= 6) r6 = (unsigned long)(arg6); \
1649 if (narg >= 5) r5 = (unsigned long)(arg5); \
1650 if (narg >= 4) r4 = (unsigned long)(arg4); \
1651 if (narg >= 3) r3 = (unsigned long)(arg3); \
1652 if (narg >= 2) r2 = (unsigned long)(arg2); \
1653 if (narg >= 1) r1 = (unsigned long)(arg1); \
1654 __asm__ __volatile__ ( \
1655 "syscall\n\t" \
1656 : "=a" (res) \
1657 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1658 : "cc", "r11", "cx", "memory"); \
1659 errno = -res; \
1660 res; \
1661 })
1662
1663#endif
1664
1665#ifdef ev_syscall
1666 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1667 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1668 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1669 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1670 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1671 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1672 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1673#else
1674 #define ev_syscall0(nr) syscall (nr)
1675 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1676 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1677 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1678 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1679 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1680 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1681#endif
1682
1683#endif
1684
1685/*****************************************************************************/
483 1686
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1687#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1688
486#if EV_MINPRI == EV_MAXPRI 1689#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0) 1690# define ABSPRI(w) (((W)w), 0)
488#else 1691#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1692# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif 1693#endif
491 1694
492#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1695#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494 1696
495typedef ev_watcher *W; 1697typedef ev_watcher *W;
496typedef ev_watcher_list *WL; 1698typedef ev_watcher_list *WL;
497typedef ev_watcher_time *WT; 1699typedef ev_watcher_time *WT;
498 1700
… …
523# include "ev_win32.c" 1725# include "ev_win32.c"
524#endif 1726#endif
525 1727
526/*****************************************************************************/ 1728/*****************************************************************************/
527 1729
1730#if EV_USE_LINUXAIO
1731# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1732#endif
1733
1734/* define a suitable floor function (only used by periodics atm) */
1735
1736#if EV_USE_FLOOR
1737# include <math.h>
1738# define ev_floor(v) floor (v)
1739#else
1740
1741#include <float.h>
1742
1743/* a floor() replacement function, should be independent of ev_tstamp type */
1744ecb_noinline
1745static ev_tstamp
1746ev_floor (ev_tstamp v)
1747{
1748 /* the choice of shift factor is not terribly important */
1749#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1750 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1751#else
1752 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1753#endif
1754
1755 /* special treatment for negative arguments */
1756 if (ecb_expect_false (v < 0.))
1757 {
1758 ev_tstamp f = -ev_floor (-v);
1759
1760 return f - (f == v ? 0 : 1);
1761 }
1762
1763 /* argument too large for an unsigned long? then reduce it */
1764 if (ecb_expect_false (v >= shift))
1765 {
1766 ev_tstamp f;
1767
1768 if (v == v - 1.)
1769 return v; /* very large numbers are assumed to be integer */
1770
1771 f = shift * ev_floor (v * (1. / shift));
1772 return f + ev_floor (v - f);
1773 }
1774
1775 /* fits into an unsigned long */
1776 return (unsigned long)v;
1777}
1778
1779#endif
1780
1781/*****************************************************************************/
1782
528#ifdef __linux 1783#ifdef __linux
529# include <sys/utsname.h> 1784# include <sys/utsname.h>
530#endif 1785#endif
531 1786
1787ecb_noinline ecb_cold
532static unsigned int noinline 1788static unsigned int
533ev_linux_version (void) 1789ev_linux_version (void)
534{ 1790{
535#ifdef __linux 1791#ifdef __linux
536 unsigned int v = 0; 1792 unsigned int v = 0;
537 struct utsname buf; 1793 struct utsname buf;
… …
566} 1822}
567 1823
568/*****************************************************************************/ 1824/*****************************************************************************/
569 1825
570#if EV_AVOID_STDIO 1826#if EV_AVOID_STDIO
571static void noinline 1827ecb_noinline ecb_cold
1828static void
572ev_printerr (const char *msg) 1829ev_printerr (const char *msg)
573{ 1830{
574 write (STDERR_FILENO, msg, strlen (msg)); 1831 write (STDERR_FILENO, msg, strlen (msg));
575} 1832}
576#endif 1833#endif
577 1834
578static void (*syserr_cb)(const char *msg); 1835static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
579 1836
1837ecb_cold
580void 1838void
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1839ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
582{ 1840{
583 syserr_cb = cb; 1841 syserr_cb = cb;
584} 1842}
585 1843
586static void noinline 1844ecb_noinline ecb_cold
1845static void
587ev_syserr (const char *msg) 1846ev_syserr (const char *msg)
588{ 1847{
589 if (!msg) 1848 if (!msg)
590 msg = "(libev) system error"; 1849 msg = "(libev) system error";
591 1850
… …
604 abort (); 1863 abort ();
605 } 1864 }
606} 1865}
607 1866
608static void * 1867static void *
609ev_realloc_emul (void *ptr, long size) 1868ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
610{ 1869{
611#if __GLIBC__
612 return realloc (ptr, size);
613#else
614 /* some systems, notably openbsd and darwin, fail to properly 1870 /* some systems, notably openbsd and darwin, fail to properly
615 * implement realloc (x, 0) (as required by both ansi c-89 and 1871 * implement realloc (x, 0) (as required by both ansi c-89 and
616 * the single unix specification, so work around them here. 1872 * the single unix specification, so work around them here.
1873 * recently, also (at least) fedora and debian started breaking it,
1874 * despite documenting it otherwise.
617 */ 1875 */
618 1876
619 if (size) 1877 if (size)
620 return realloc (ptr, size); 1878 return realloc (ptr, size);
621 1879
622 free (ptr); 1880 free (ptr);
623 return 0; 1881 return 0;
624#endif
625} 1882}
626 1883
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1884static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
628 1885
1886ecb_cold
629void 1887void
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1888ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
631{ 1889{
632 alloc = cb; 1890 alloc = cb;
633} 1891}
634 1892
635inline_speed void * 1893inline_speed void *
… …
662typedef struct 1920typedef struct
663{ 1921{
664 WL head; 1922 WL head;
665 unsigned char events; /* the events watched for */ 1923 unsigned char events; /* the events watched for */
666 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1924 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
667 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1925 unsigned char emask; /* some backends store the actual kernel mask in here */
668 unsigned char unused; 1926 unsigned char eflags; /* flags field for use by backends */
669#if EV_USE_EPOLL 1927#if EV_USE_EPOLL
670 unsigned int egen; /* generation counter to counter epoll bugs */ 1928 unsigned int egen; /* generation counter to counter epoll bugs */
671#endif 1929#endif
672#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 1930#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
673 SOCKET handle; 1931 SOCKET handle;
… …
723 #undef VAR 1981 #undef VAR
724 }; 1982 };
725 #include "ev_wrap.h" 1983 #include "ev_wrap.h"
726 1984
727 static struct ev_loop default_loop_struct; 1985 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1986 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1987
730#else 1988#else
731 1989
732 ev_tstamp ev_rt_now; 1990 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
733 #define VAR(name,decl) static decl; 1991 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1992 #include "ev_vars.h"
735 #undef VAR 1993 #undef VAR
736 1994
737 static int ev_default_loop_ptr; 1995 static int ev_default_loop_ptr;
738 1996
739#endif 1997#endif
740 1998
741#if EV_FEATURE_API 1999#if EV_FEATURE_API
742# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 2000# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
743# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 2001# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
744# define EV_INVOKE_PENDING invoke_cb (EV_A) 2002# define EV_INVOKE_PENDING invoke_cb (EV_A)
745#else 2003#else
746# define EV_RELEASE_CB (void)0 2004# define EV_RELEASE_CB (void)0
747# define EV_ACQUIRE_CB (void)0 2005# define EV_ACQUIRE_CB (void)0
748# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2006# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
… …
752 2010
753/*****************************************************************************/ 2011/*****************************************************************************/
754 2012
755#ifndef EV_HAVE_EV_TIME 2013#ifndef EV_HAVE_EV_TIME
756ev_tstamp 2014ev_tstamp
757ev_time (void) 2015ev_time (void) EV_NOEXCEPT
758{ 2016{
759#if EV_USE_REALTIME 2017#if EV_USE_REALTIME
760 if (expect_true (have_realtime)) 2018 if (ecb_expect_true (have_realtime))
761 { 2019 {
762 struct timespec ts; 2020 struct timespec ts;
763 clock_gettime (CLOCK_REALTIME, &ts); 2021 clock_gettime (CLOCK_REALTIME, &ts);
764 return ts.tv_sec + ts.tv_nsec * 1e-9; 2022 return EV_TS_GET (ts);
765 } 2023 }
766#endif 2024#endif
767 2025
2026 {
768 struct timeval tv; 2027 struct timeval tv;
769 gettimeofday (&tv, 0); 2028 gettimeofday (&tv, 0);
770 return tv.tv_sec + tv.tv_usec * 1e-6; 2029 return EV_TV_GET (tv);
2030 }
771} 2031}
772#endif 2032#endif
773 2033
774inline_size ev_tstamp 2034inline_size ev_tstamp
775get_clock (void) 2035get_clock (void)
776{ 2036{
777#if EV_USE_MONOTONIC 2037#if EV_USE_MONOTONIC
778 if (expect_true (have_monotonic)) 2038 if (ecb_expect_true (have_monotonic))
779 { 2039 {
780 struct timespec ts; 2040 struct timespec ts;
781 clock_gettime (CLOCK_MONOTONIC, &ts); 2041 clock_gettime (CLOCK_MONOTONIC, &ts);
782 return ts.tv_sec + ts.tv_nsec * 1e-9; 2042 return EV_TS_GET (ts);
783 } 2043 }
784#endif 2044#endif
785 2045
786 return ev_time (); 2046 return ev_time ();
787} 2047}
788 2048
789#if EV_MULTIPLICITY 2049#if EV_MULTIPLICITY
790ev_tstamp 2050ev_tstamp
791ev_now (EV_P) 2051ev_now (EV_P) EV_NOEXCEPT
792{ 2052{
793 return ev_rt_now; 2053 return ev_rt_now;
794} 2054}
795#endif 2055#endif
796 2056
797void 2057void
798ev_sleep (ev_tstamp delay) 2058ev_sleep (ev_tstamp delay) EV_NOEXCEPT
799{ 2059{
800 if (delay > 0.) 2060 if (delay > EV_TS_CONST (0.))
801 { 2061 {
802#if EV_USE_NANOSLEEP 2062#if EV_USE_NANOSLEEP
803 struct timespec ts; 2063 struct timespec ts;
804 2064
805 EV_TS_SET (ts, delay); 2065 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 2066 nanosleep (&ts, 0);
807#elif defined(_WIN32) 2067#elif defined _WIN32
2068 /* maybe this should round up, as ms is very low resolution */
2069 /* compared to select (µs) or nanosleep (ns) */
808 Sleep ((unsigned long)(delay * 1e3)); 2070 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
809#else 2071#else
810 struct timeval tv; 2072 struct timeval tv;
811 2073
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2074 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
813 /* something not guaranteed by newer posix versions, but guaranteed */ 2075 /* something not guaranteed by newer posix versions, but guaranteed */
… …
816 select (0, 0, 0, 0, &tv); 2078 select (0, 0, 0, 0, &tv);
817#endif 2079#endif
818 } 2080 }
819} 2081}
820 2082
821inline_speed int
822ev_timeout_to_ms (ev_tstamp timeout)
823{
824 int ms = timeout * 1000. + .999999;
825
826 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
827}
828
829/*****************************************************************************/ 2083/*****************************************************************************/
830 2084
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 2085#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 2086
833/* find a suitable new size for the given array, */ 2087/* find a suitable new size for the given array, */
… …
839 2093
840 do 2094 do
841 ncur <<= 1; 2095 ncur <<= 1;
842 while (cnt > ncur); 2096 while (cnt > ncur);
843 2097
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2098 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2099 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 2100 {
847 ncur *= elem; 2101 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2102 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 2103 ncur = ncur - sizeof (void *) * 4;
… …
851 } 2105 }
852 2106
853 return ncur; 2107 return ncur;
854} 2108}
855 2109
856static noinline void * 2110ecb_noinline ecb_cold
2111static void *
857array_realloc (int elem, void *base, int *cur, int cnt) 2112array_realloc (int elem, void *base, int *cur, int cnt)
858{ 2113{
859 *cur = array_nextsize (elem, *cur, cnt); 2114 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 2115 return ev_realloc (base, elem * *cur);
861} 2116}
862 2117
2118#define array_needsize_noinit(base,offset,count)
2119
863#define array_init_zero(base,count) \ 2120#define array_needsize_zerofill(base,offset,count) \
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2121 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
865 2122
866#define array_needsize(type,base,cur,cnt,init) \ 2123#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 2124 if (ecb_expect_false ((cnt) > (cur))) \
868 { \ 2125 { \
869 int ocur_ = (cur); \ 2126 ecb_unused int ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 2127 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 2128 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 2129 init ((base), ocur_, ((cur) - ocur_)); \
873 } 2130 }
874 2131
875#if 0 2132#if 0
876#define array_slim(type,stem) \ 2133#define array_slim(type,stem) \
877 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2134 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
886 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2143 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
887 2144
888/*****************************************************************************/ 2145/*****************************************************************************/
889 2146
890/* dummy callback for pending events */ 2147/* dummy callback for pending events */
891static void noinline 2148ecb_noinline
2149static void
892pendingcb (EV_P_ ev_prepare *w, int revents) 2150pendingcb (EV_P_ ev_prepare *w, int revents)
893{ 2151{
894} 2152}
895 2153
896void noinline 2154ecb_noinline
2155void
897ev_feed_event (EV_P_ void *w, int revents) 2156ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
898{ 2157{
899 W w_ = (W)w; 2158 W w_ = (W)w;
900 int pri = ABSPRI (w_); 2159 int pri = ABSPRI (w_);
901 2160
902 if (expect_false (w_->pending)) 2161 if (ecb_expect_false (w_->pending))
903 pendings [pri][w_->pending - 1].events |= revents; 2162 pendings [pri][w_->pending - 1].events |= revents;
904 else 2163 else
905 { 2164 {
906 w_->pending = ++pendingcnt [pri]; 2165 w_->pending = ++pendingcnt [pri];
907 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2166 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
908 pendings [pri][w_->pending - 1].w = w_; 2167 pendings [pri][w_->pending - 1].w = w_;
909 pendings [pri][w_->pending - 1].events = revents; 2168 pendings [pri][w_->pending - 1].events = revents;
910 } 2169 }
2170
2171 pendingpri = NUMPRI - 1;
911} 2172}
912 2173
913inline_speed void 2174inline_speed void
914feed_reverse (EV_P_ W w) 2175feed_reverse (EV_P_ W w)
915{ 2176{
916 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2177 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
917 rfeeds [rfeedcnt++] = w; 2178 rfeeds [rfeedcnt++] = w;
918} 2179}
919 2180
920inline_size void 2181inline_size void
921feed_reverse_done (EV_P_ int revents) 2182feed_reverse_done (EV_P_ int revents)
… …
956inline_speed void 2217inline_speed void
957fd_event (EV_P_ int fd, int revents) 2218fd_event (EV_P_ int fd, int revents)
958{ 2219{
959 ANFD *anfd = anfds + fd; 2220 ANFD *anfd = anfds + fd;
960 2221
961 if (expect_true (!anfd->reify)) 2222 if (ecb_expect_true (!anfd->reify))
962 fd_event_nocheck (EV_A_ fd, revents); 2223 fd_event_nocheck (EV_A_ fd, revents);
963} 2224}
964 2225
965void 2226void
966ev_feed_fd_event (EV_P_ int fd, int revents) 2227ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
967{ 2228{
968 if (fd >= 0 && fd < anfdmax) 2229 if (fd >= 0 && fd < anfdmax)
969 fd_event_nocheck (EV_A_ fd, revents); 2230 fd_event_nocheck (EV_A_ fd, revents);
970} 2231}
971 2232
… …
974inline_size void 2235inline_size void
975fd_reify (EV_P) 2236fd_reify (EV_P)
976{ 2237{
977 int i; 2238 int i;
978 2239
2240#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2241 for (i = 0; i < fdchangecnt; ++i)
2242 {
2243 int fd = fdchanges [i];
2244 ANFD *anfd = anfds + fd;
2245
2246 if (anfd->reify & EV__IOFDSET && anfd->head)
2247 {
2248 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2249
2250 if (handle != anfd->handle)
2251 {
2252 unsigned long arg;
2253
2254 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2255
2256 /* handle changed, but fd didn't - we need to do it in two steps */
2257 backend_modify (EV_A_ fd, anfd->events, 0);
2258 anfd->events = 0;
2259 anfd->handle = handle;
2260 }
2261 }
2262 }
2263#endif
2264
979 for (i = 0; i < fdchangecnt; ++i) 2265 for (i = 0; i < fdchangecnt; ++i)
980 { 2266 {
981 int fd = fdchanges [i]; 2267 int fd = fdchanges [i];
982 ANFD *anfd = anfds + fd; 2268 ANFD *anfd = anfds + fd;
983 ev_io *w; 2269 ev_io *w;
984 2270
985 unsigned char o_events = anfd->events; 2271 unsigned char o_events = anfd->events;
986 unsigned char o_reify = anfd->reify; 2272 unsigned char o_reify = anfd->reify;
987 2273
988 anfd->reify = 0; 2274 anfd->reify = 0;
989 2275
990#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
991 if (o_reify & EV__IOFDSET)
992 {
993 unsigned long arg;
994 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
995 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
996 printf ("oi %d %x\n", fd, anfd->handle);//D
997 }
998#endif
999
1000 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2276 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1001 { 2277 {
1002 anfd->events = 0; 2278 anfd->events = 0;
1003 2279
1004 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2280 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1005 anfd->events |= (unsigned char)w->events; 2281 anfd->events |= (unsigned char)w->events;
… …
1014 2290
1015 fdchangecnt = 0; 2291 fdchangecnt = 0;
1016} 2292}
1017 2293
1018/* something about the given fd changed */ 2294/* something about the given fd changed */
1019inline_size void 2295inline_size
2296void
1020fd_change (EV_P_ int fd, int flags) 2297fd_change (EV_P_ int fd, int flags)
1021{ 2298{
1022 unsigned char reify = anfds [fd].reify; 2299 unsigned char reify = anfds [fd].reify;
1023 anfds [fd].reify |= flags; 2300 anfds [fd].reify |= flags;
1024 2301
1025 if (expect_true (!reify)) 2302 if (ecb_expect_true (!reify))
1026 { 2303 {
1027 ++fdchangecnt; 2304 ++fdchangecnt;
1028 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2305 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1029 fdchanges [fdchangecnt - 1] = fd; 2306 fdchanges [fdchangecnt - 1] = fd;
1030 } 2307 }
1031} 2308}
1032 2309
1033/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2310/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034inline_speed void 2311inline_speed ecb_cold void
1035fd_kill (EV_P_ int fd) 2312fd_kill (EV_P_ int fd)
1036{ 2313{
1037 ev_io *w; 2314 ev_io *w;
1038 2315
1039 while ((w = (ev_io *)anfds [fd].head)) 2316 while ((w = (ev_io *)anfds [fd].head))
… …
1042 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2319 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1043 } 2320 }
1044} 2321}
1045 2322
1046/* check whether the given fd is actually valid, for error recovery */ 2323/* check whether the given fd is actually valid, for error recovery */
1047inline_size int 2324inline_size ecb_cold int
1048fd_valid (int fd) 2325fd_valid (int fd)
1049{ 2326{
1050#ifdef _WIN32 2327#ifdef _WIN32
1051 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2328 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052#else 2329#else
1053 return fcntl (fd, F_GETFD) != -1; 2330 return fcntl (fd, F_GETFD) != -1;
1054#endif 2331#endif
1055} 2332}
1056 2333
1057/* called on EBADF to verify fds */ 2334/* called on EBADF to verify fds */
1058static void noinline 2335ecb_noinline ecb_cold
2336static void
1059fd_ebadf (EV_P) 2337fd_ebadf (EV_P)
1060{ 2338{
1061 int fd; 2339 int fd;
1062 2340
1063 for (fd = 0; fd < anfdmax; ++fd) 2341 for (fd = 0; fd < anfdmax; ++fd)
… …
1065 if (!fd_valid (fd) && errno == EBADF) 2343 if (!fd_valid (fd) && errno == EBADF)
1066 fd_kill (EV_A_ fd); 2344 fd_kill (EV_A_ fd);
1067} 2345}
1068 2346
1069/* called on ENOMEM in select/poll to kill some fds and retry */ 2347/* called on ENOMEM in select/poll to kill some fds and retry */
1070static void noinline 2348ecb_noinline ecb_cold
2349static void
1071fd_enomem (EV_P) 2350fd_enomem (EV_P)
1072{ 2351{
1073 int fd; 2352 int fd;
1074 2353
1075 for (fd = anfdmax; fd--; ) 2354 for (fd = anfdmax; fd--; )
… …
1079 break; 2358 break;
1080 } 2359 }
1081} 2360}
1082 2361
1083/* usually called after fork if backend needs to re-arm all fds from scratch */ 2362/* usually called after fork if backend needs to re-arm all fds from scratch */
1084static void noinline 2363ecb_noinline
2364static void
1085fd_rearm_all (EV_P) 2365fd_rearm_all (EV_P)
1086{ 2366{
1087 int fd; 2367 int fd;
1088 2368
1089 for (fd = 0; fd < anfdmax; ++fd) 2369 for (fd = 0; fd < anfdmax; ++fd)
… …
1142 ev_tstamp minat; 2422 ev_tstamp minat;
1143 ANHE *minpos; 2423 ANHE *minpos;
1144 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2424 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1145 2425
1146 /* find minimum child */ 2426 /* find minimum child */
1147 if (expect_true (pos + DHEAP - 1 < E)) 2427 if (ecb_expect_true (pos + DHEAP - 1 < E))
1148 { 2428 {
1149 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2429 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1150 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2430 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1151 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2431 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1152 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2432 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1153 } 2433 }
1154 else if (pos < E) 2434 else if (pos < E)
1155 { 2435 {
1156 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2436 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1157 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2437 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1158 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2438 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1159 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2439 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1160 } 2440 }
1161 else 2441 else
1162 break; 2442 break;
1163 2443
1164 if (ANHE_at (he) <= minat) 2444 if (ANHE_at (he) <= minat)
… …
1172 2452
1173 heap [k] = he; 2453 heap [k] = he;
1174 ev_active (ANHE_w (he)) = k; 2454 ev_active (ANHE_w (he)) = k;
1175} 2455}
1176 2456
1177#else /* 4HEAP */ 2457#else /* not 4HEAP */
1178 2458
1179#define HEAP0 1 2459#define HEAP0 1
1180#define HPARENT(k) ((k) >> 1) 2460#define HPARENT(k) ((k) >> 1)
1181#define UPHEAP_DONE(p,k) (!(p)) 2461#define UPHEAP_DONE(p,k) (!(p))
1182 2462
… …
1270 2550
1271/*****************************************************************************/ 2551/*****************************************************************************/
1272 2552
1273#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2553#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1274 2554
1275static void noinline 2555ecb_noinline ecb_cold
2556static void
1276evpipe_init (EV_P) 2557evpipe_init (EV_P)
1277{ 2558{
1278 if (!ev_is_active (&pipe_w)) 2559 if (!ev_is_active (&pipe_w))
1279 { 2560 {
2561 int fds [2];
2562
1280# if EV_USE_EVENTFD 2563# if EV_USE_EVENTFD
2564 fds [0] = -1;
1281 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2565 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1282 if (evfd < 0 && errno == EINVAL) 2566 if (fds [1] < 0 && errno == EINVAL)
1283 evfd = eventfd (0, 0); 2567 fds [1] = eventfd (0, 0);
1284 2568
1285 if (evfd >= 0) 2569 if (fds [1] < 0)
2570# endif
1286 { 2571 {
2572 while (pipe (fds))
2573 ev_syserr ("(libev) error creating signal/async pipe");
2574
2575 fd_intern (fds [0]);
2576 }
2577
1287 evpipe [0] = -1; 2578 evpipe [0] = fds [0];
1288 fd_intern (evfd); /* doing it twice doesn't hurt */ 2579
1289 ev_io_set (&pipe_w, evfd, EV_READ); 2580 if (evpipe [1] < 0)
2581 evpipe [1] = fds [1]; /* first call, set write fd */
2582 else
2583 {
2584 /* on subsequent calls, do not change evpipe [1] */
2585 /* so that evpipe_write can always rely on its value. */
2586 /* this branch does not do anything sensible on windows, */
2587 /* so must not be executed on windows */
2588
2589 dup2 (fds [1], evpipe [1]);
2590 close (fds [1]);
2591 }
2592
2593 fd_intern (evpipe [1]);
2594
2595 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2596 ev_io_start (EV_A_ &pipe_w);
2597 ev_unref (EV_A); /* watcher should not keep loop alive */
2598 }
2599}
2600
2601inline_speed void
2602evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2603{
2604 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2605
2606 if (ecb_expect_true (*flag))
2607 return;
2608
2609 *flag = 1;
2610 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2611
2612 pipe_write_skipped = 1;
2613
2614 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2615
2616 if (pipe_write_wanted)
2617 {
2618 int old_errno;
2619
2620 pipe_write_skipped = 0;
2621 ECB_MEMORY_FENCE_RELEASE;
2622
2623 old_errno = errno; /* save errno because write will clobber it */
2624
2625#if EV_USE_EVENTFD
2626 if (evpipe [0] < 0)
2627 {
2628 uint64_t counter = 1;
2629 write (evpipe [1], &counter, sizeof (uint64_t));
1290 } 2630 }
1291 else 2631 else
1292# endif 2632#endif
1293 { 2633 {
1294 while (pipe (evpipe)) 2634#ifdef _WIN32
1295 ev_syserr ("(libev) error creating signal/async pipe"); 2635 WSABUF buf;
1296 2636 DWORD sent;
1297 fd_intern (evpipe [0]); 2637 buf.buf = (char *)&buf;
1298 fd_intern (evpipe [1]); 2638 buf.len = 1;
1299 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2639 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2640#else
2641 write (evpipe [1], &(evpipe [1]), 1);
2642#endif
1300 } 2643 }
1301
1302 ev_io_start (EV_A_ &pipe_w);
1303 ev_unref (EV_A); /* watcher should not keep loop alive */
1304 }
1305}
1306
1307inline_size void
1308evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1309{
1310 if (!*flag)
1311 {
1312 int old_errno = errno; /* save errno because write might clobber it */
1313 char dummy;
1314
1315 *flag = 1;
1316
1317#if EV_USE_EVENTFD
1318 if (evfd >= 0)
1319 {
1320 uint64_t counter = 1;
1321 write (evfd, &counter, sizeof (uint64_t));
1322 }
1323 else
1324#endif
1325 /* win32 people keep sending patches that change this write() to send() */
1326 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1327 /* so when you think this write should be a send instead, please find out */
1328 /* where your send() is from - it's definitely not the microsoft send, and */
1329 /* tell me. thank you. */
1330 write (evpipe [1], &dummy, 1);
1331 2644
1332 errno = old_errno; 2645 errno = old_errno;
1333 } 2646 }
1334} 2647}
1335 2648
… …
1338static void 2651static void
1339pipecb (EV_P_ ev_io *iow, int revents) 2652pipecb (EV_P_ ev_io *iow, int revents)
1340{ 2653{
1341 int i; 2654 int i;
1342 2655
2656 if (revents & EV_READ)
2657 {
1343#if EV_USE_EVENTFD 2658#if EV_USE_EVENTFD
1344 if (evfd >= 0) 2659 if (evpipe [0] < 0)
1345 { 2660 {
1346 uint64_t counter; 2661 uint64_t counter;
1347 read (evfd, &counter, sizeof (uint64_t)); 2662 read (evpipe [1], &counter, sizeof (uint64_t));
1348 } 2663 }
1349 else 2664 else
1350#endif 2665#endif
1351 { 2666 {
1352 char dummy; 2667 char dummy[4];
1353 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2668#ifdef _WIN32
2669 WSABUF buf;
2670 DWORD recvd;
2671 DWORD flags = 0;
2672 buf.buf = dummy;
2673 buf.len = sizeof (dummy);
2674 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2675#else
1354 read (evpipe [0], &dummy, 1); 2676 read (evpipe [0], &dummy, sizeof (dummy));
2677#endif
2678 }
1355 } 2679 }
2680
2681 pipe_write_skipped = 0;
2682
2683 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1356 2684
1357#if EV_SIGNAL_ENABLE 2685#if EV_SIGNAL_ENABLE
1358 if (sig_pending) 2686 if (sig_pending)
1359 { 2687 {
1360 sig_pending = 0; 2688 sig_pending = 0;
1361 2689
2690 ECB_MEMORY_FENCE;
2691
1362 for (i = EV_NSIG - 1; i--; ) 2692 for (i = EV_NSIG - 1; i--; )
1363 if (expect_false (signals [i].pending)) 2693 if (ecb_expect_false (signals [i].pending))
1364 ev_feed_signal_event (EV_A_ i + 1); 2694 ev_feed_signal_event (EV_A_ i + 1);
1365 } 2695 }
1366#endif 2696#endif
1367 2697
1368#if EV_ASYNC_ENABLE 2698#if EV_ASYNC_ENABLE
1369 if (async_pending) 2699 if (async_pending)
1370 { 2700 {
1371 async_pending = 0; 2701 async_pending = 0;
2702
2703 ECB_MEMORY_FENCE;
1372 2704
1373 for (i = asynccnt; i--; ) 2705 for (i = asynccnt; i--; )
1374 if (asyncs [i]->sent) 2706 if (asyncs [i]->sent)
1375 { 2707 {
1376 asyncs [i]->sent = 0; 2708 asyncs [i]->sent = 0;
2709 ECB_MEMORY_FENCE_RELEASE;
1377 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2710 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1378 } 2711 }
1379 } 2712 }
1380#endif 2713#endif
1381} 2714}
1382 2715
1383/*****************************************************************************/ 2716/*****************************************************************************/
1384 2717
1385void 2718void
1386ev_feed_signal (int signum) 2719ev_feed_signal (int signum) EV_NOEXCEPT
1387{ 2720{
1388#if EV_MULTIPLICITY 2721#if EV_MULTIPLICITY
2722 EV_P;
2723 ECB_MEMORY_FENCE_ACQUIRE;
1389 EV_P = signals [signum - 1].loop; 2724 EV_A = signals [signum - 1].loop;
1390 2725
1391 if (!EV_A) 2726 if (!EV_A)
1392 return; 2727 return;
1393#endif 2728#endif
1394 2729
… …
1404#endif 2739#endif
1405 2740
1406 ev_feed_signal (signum); 2741 ev_feed_signal (signum);
1407} 2742}
1408 2743
1409void noinline 2744ecb_noinline
2745void
1410ev_feed_signal_event (EV_P_ int signum) 2746ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1411{ 2747{
1412 WL w; 2748 WL w;
1413 2749
1414 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2750 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1415 return; 2751 return;
1416 2752
1417 --signum; 2753 --signum;
1418 2754
1419#if EV_MULTIPLICITY 2755#if EV_MULTIPLICITY
1420 /* it is permissible to try to feed a signal to the wrong loop */ 2756 /* it is permissible to try to feed a signal to the wrong loop */
1421 /* or, likely more useful, feeding a signal nobody is waiting for */ 2757 /* or, likely more useful, feeding a signal nobody is waiting for */
1422 2758
1423 if (expect_false (signals [signum].loop != EV_A)) 2759 if (ecb_expect_false (signals [signum].loop != EV_A))
1424 return; 2760 return;
1425#endif 2761#endif
1426 2762
1427 signals [signum].pending = 0; 2763 signals [signum].pending = 0;
2764 ECB_MEMORY_FENCE_RELEASE;
1428 2765
1429 for (w = signals [signum].head; w; w = w->next) 2766 for (w = signals [signum].head; w; w = w->next)
1430 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2767 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1431} 2768}
1432 2769
… …
1523# include "ev_kqueue.c" 2860# include "ev_kqueue.c"
1524#endif 2861#endif
1525#if EV_USE_EPOLL 2862#if EV_USE_EPOLL
1526# include "ev_epoll.c" 2863# include "ev_epoll.c"
1527#endif 2864#endif
2865#if EV_USE_LINUXAIO
2866# include "ev_linuxaio.c"
2867#endif
2868#if EV_USE_IOURING
2869# include "ev_iouring.c"
2870#endif
1528#if EV_USE_POLL 2871#if EV_USE_POLL
1529# include "ev_poll.c" 2872# include "ev_poll.c"
1530#endif 2873#endif
1531#if EV_USE_SELECT 2874#if EV_USE_SELECT
1532# include "ev_select.c" 2875# include "ev_select.c"
1533#endif 2876#endif
1534 2877
1535int 2878ecb_cold int
1536ev_version_major (void) 2879ev_version_major (void) EV_NOEXCEPT
1537{ 2880{
1538 return EV_VERSION_MAJOR; 2881 return EV_VERSION_MAJOR;
1539} 2882}
1540 2883
1541int 2884ecb_cold int
1542ev_version_minor (void) 2885ev_version_minor (void) EV_NOEXCEPT
1543{ 2886{
1544 return EV_VERSION_MINOR; 2887 return EV_VERSION_MINOR;
1545} 2888}
1546 2889
1547/* return true if we are running with elevated privileges and should ignore env variables */ 2890/* return true if we are running with elevated privileges and should ignore env variables */
1548int inline_size 2891inline_size ecb_cold int
1549enable_secure (void) 2892enable_secure (void)
1550{ 2893{
1551#ifdef _WIN32 2894#ifdef _WIN32
1552 return 0; 2895 return 0;
1553#else 2896#else
1554 return getuid () != geteuid () 2897 return getuid () != geteuid ()
1555 || getgid () != getegid (); 2898 || getgid () != getegid ();
1556#endif 2899#endif
1557} 2900}
1558 2901
2902ecb_cold
1559unsigned int 2903unsigned int
1560ev_supported_backends (void) 2904ev_supported_backends (void) EV_NOEXCEPT
1561{ 2905{
1562 unsigned int flags = 0; 2906 unsigned int flags = 0;
1563 2907
1564 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2908 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1565 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2909 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1566 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2910 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2911 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
2912 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING;
1567 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2913 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1568 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2914 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1569 2915
1570 return flags; 2916 return flags;
1571} 2917}
1572 2918
2919ecb_cold
1573unsigned int 2920unsigned int
1574ev_recommended_backends (void) 2921ev_recommended_backends (void) EV_NOEXCEPT
1575{ 2922{
1576 unsigned int flags = ev_supported_backends (); 2923 unsigned int flags = ev_supported_backends ();
1577 2924
1578#ifndef __NetBSD__ 2925#ifndef __NetBSD__
1579 /* kqueue is borked on everything but netbsd apparently */ 2926 /* kqueue is borked on everything but netbsd apparently */
… …
1587#endif 2934#endif
1588#ifdef __FreeBSD__ 2935#ifdef __FreeBSD__
1589 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2936 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1590#endif 2937#endif
1591 2938
2939 /* TODO: linuxaio is very experimental */
2940#if !EV_RECOMMEND_LINUXAIO
2941 flags &= ~EVBACKEND_LINUXAIO;
2942#endif
2943 /* TODO: linuxaio is super experimental */
2944#if !EV_RECOMMEND_IOURING
2945 flags &= ~EVBACKEND_IOURING;
2946#endif
2947
1592 return flags; 2948 return flags;
1593} 2949}
1594 2950
2951ecb_cold
1595unsigned int 2952unsigned int
1596ev_embeddable_backends (void) 2953ev_embeddable_backends (void) EV_NOEXCEPT
1597{ 2954{
1598 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2955 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1599 2956
1600 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2957 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1601 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2958 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1602 flags &= ~EVBACKEND_EPOLL; 2959 flags &= ~EVBACKEND_EPOLL;
1603 2960
2961 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
2962
2963 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
2964 * because our backend_fd is the epoll fd we need as fallback.
2965 * if the kernel ever is fixed, this might change...
2966 */
2967
1604 return flags; 2968 return flags;
1605} 2969}
1606 2970
1607unsigned int 2971unsigned int
1608ev_backend (EV_P) 2972ev_backend (EV_P) EV_NOEXCEPT
1609{ 2973{
1610 return backend; 2974 return backend;
1611} 2975}
1612 2976
1613#if EV_FEATURE_API 2977#if EV_FEATURE_API
1614unsigned int 2978unsigned int
1615ev_iteration (EV_P) 2979ev_iteration (EV_P) EV_NOEXCEPT
1616{ 2980{
1617 return loop_count; 2981 return loop_count;
1618} 2982}
1619 2983
1620unsigned int 2984unsigned int
1621ev_depth (EV_P) 2985ev_depth (EV_P) EV_NOEXCEPT
1622{ 2986{
1623 return loop_depth; 2987 return loop_depth;
1624} 2988}
1625 2989
1626void 2990void
1627ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2991ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1628{ 2992{
1629 io_blocktime = interval; 2993 io_blocktime = interval;
1630} 2994}
1631 2995
1632void 2996void
1633ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2997ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1634{ 2998{
1635 timeout_blocktime = interval; 2999 timeout_blocktime = interval;
1636} 3000}
1637 3001
1638void 3002void
1639ev_set_userdata (EV_P_ void *data) 3003ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1640{ 3004{
1641 userdata = data; 3005 userdata = data;
1642} 3006}
1643 3007
1644void * 3008void *
1645ev_userdata (EV_P) 3009ev_userdata (EV_P) EV_NOEXCEPT
1646{ 3010{
1647 return userdata; 3011 return userdata;
1648} 3012}
1649 3013
3014void
1650void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 3015ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1651{ 3016{
1652 invoke_cb = invoke_pending_cb; 3017 invoke_cb = invoke_pending_cb;
1653} 3018}
1654 3019
3020void
1655void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 3021ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1656{ 3022{
1657 release_cb = release; 3023 release_cb = release;
1658 acquire_cb = acquire; 3024 acquire_cb = acquire;
1659} 3025}
1660#endif 3026#endif
1661 3027
1662/* initialise a loop structure, must be zero-initialised */ 3028/* initialise a loop structure, must be zero-initialised */
1663static void noinline 3029ecb_noinline ecb_cold
3030static void
1664loop_init (EV_P_ unsigned int flags) 3031loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1665{ 3032{
1666 if (!backend) 3033 if (!backend)
1667 { 3034 {
1668 origflags = flags; 3035 origflags = flags;
1669 3036
… …
1696 if (!(flags & EVFLAG_NOENV) 3063 if (!(flags & EVFLAG_NOENV)
1697 && !enable_secure () 3064 && !enable_secure ()
1698 && getenv ("LIBEV_FLAGS")) 3065 && getenv ("LIBEV_FLAGS"))
1699 flags = atoi (getenv ("LIBEV_FLAGS")); 3066 flags = atoi (getenv ("LIBEV_FLAGS"));
1700 3067
1701 ev_rt_now = ev_time (); 3068 ev_rt_now = ev_time ();
1702 mn_now = get_clock (); 3069 mn_now = get_clock ();
1703 now_floor = mn_now; 3070 now_floor = mn_now;
1704 rtmn_diff = ev_rt_now - mn_now; 3071 rtmn_diff = ev_rt_now - mn_now;
1705#if EV_FEATURE_API 3072#if EV_FEATURE_API
1706 invoke_cb = ev_invoke_pending; 3073 invoke_cb = ev_invoke_pending;
1707#endif 3074#endif
1708 3075
1709 io_blocktime = 0.; 3076 io_blocktime = 0.;
1710 timeout_blocktime = 0.; 3077 timeout_blocktime = 0.;
1711 backend = 0; 3078 backend = 0;
1712 backend_fd = -1; 3079 backend_fd = -1;
1713 sig_pending = 0; 3080 sig_pending = 0;
1714#if EV_ASYNC_ENABLE 3081#if EV_ASYNC_ENABLE
1715 async_pending = 0; 3082 async_pending = 0;
1716#endif 3083#endif
3084 pipe_write_skipped = 0;
3085 pipe_write_wanted = 0;
3086 evpipe [0] = -1;
3087 evpipe [1] = -1;
1717#if EV_USE_INOTIFY 3088#if EV_USE_INOTIFY
1718 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3089 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719#endif 3090#endif
1720#if EV_USE_SIGNALFD 3091#if EV_USE_SIGNALFD
1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3092 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722#endif 3093#endif
1723 3094
1724 if (!(flags & EVBACKEND_MASK)) 3095 if (!(flags & EVBACKEND_MASK))
1725 flags |= ev_recommended_backends (); 3096 flags |= ev_recommended_backends ();
1726 3097
1727#if EV_USE_IOCP 3098#if EV_USE_IOCP
1728 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 3099 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1729#endif 3100#endif
1730#if EV_USE_PORT 3101#if EV_USE_PORT
1731 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3102 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1732#endif 3103#endif
1733#if EV_USE_KQUEUE 3104#if EV_USE_KQUEUE
1734 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3105 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3106#endif
3107#if EV_USE_IOURING
3108 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3109#endif
3110#if EV_USE_LINUXAIO
3111 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1735#endif 3112#endif
1736#if EV_USE_EPOLL 3113#if EV_USE_EPOLL
1737 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3114 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1738#endif 3115#endif
1739#if EV_USE_POLL 3116#if EV_USE_POLL
1740 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3117 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1741#endif 3118#endif
1742#if EV_USE_SELECT 3119#if EV_USE_SELECT
1743 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3120 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1744#endif 3121#endif
1745 3122
1746 ev_prepare_init (&pending_w, pendingcb); 3123 ev_prepare_init (&pending_w, pendingcb);
1747 3124
1748#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3125#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1751#endif 3128#endif
1752 } 3129 }
1753} 3130}
1754 3131
1755/* free up a loop structure */ 3132/* free up a loop structure */
3133ecb_cold
1756void 3134void
1757ev_loop_destroy (EV_P) 3135ev_loop_destroy (EV_P)
1758{ 3136{
1759 int i; 3137 int i;
1760 3138
… …
1764 return; 3142 return;
1765#endif 3143#endif
1766 3144
1767#if EV_CLEANUP_ENABLE 3145#if EV_CLEANUP_ENABLE
1768 /* queue cleanup watchers (and execute them) */ 3146 /* queue cleanup watchers (and execute them) */
1769 if (expect_false (cleanupcnt)) 3147 if (ecb_expect_false (cleanupcnt))
1770 { 3148 {
1771 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); 3149 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1772 EV_INVOKE_PENDING; 3150 EV_INVOKE_PENDING;
1773 } 3151 }
1774#endif 3152#endif
1775 3153
1776#if EV_CHILD_ENABLE 3154#if EV_CHILD_ENABLE
1777 if (ev_is_active (&childev)) 3155 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1778 { 3156 {
1779 ev_ref (EV_A); /* child watcher */ 3157 ev_ref (EV_A); /* child watcher */
1780 ev_signal_stop (EV_A_ &childev); 3158 ev_signal_stop (EV_A_ &childev);
1781 } 3159 }
1782#endif 3160#endif
… …
1784 if (ev_is_active (&pipe_w)) 3162 if (ev_is_active (&pipe_w))
1785 { 3163 {
1786 /*ev_ref (EV_A);*/ 3164 /*ev_ref (EV_A);*/
1787 /*ev_io_stop (EV_A_ &pipe_w);*/ 3165 /*ev_io_stop (EV_A_ &pipe_w);*/
1788 3166
1789#if EV_USE_EVENTFD
1790 if (evfd >= 0)
1791 close (evfd);
1792#endif
1793
1794 if (evpipe [0] >= 0)
1795 {
1796 EV_WIN32_CLOSE_FD (evpipe [0]); 3167 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1797 EV_WIN32_CLOSE_FD (evpipe [1]); 3168 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1798 }
1799 } 3169 }
1800 3170
1801#if EV_USE_SIGNALFD 3171#if EV_USE_SIGNALFD
1802 if (ev_is_active (&sigfd_w)) 3172 if (ev_is_active (&sigfd_w))
1803 close (sigfd); 3173 close (sigfd);
… …
1810 3180
1811 if (backend_fd >= 0) 3181 if (backend_fd >= 0)
1812 close (backend_fd); 3182 close (backend_fd);
1813 3183
1814#if EV_USE_IOCP 3184#if EV_USE_IOCP
1815 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); 3185 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1816#endif 3186#endif
1817#if EV_USE_PORT 3187#if EV_USE_PORT
1818 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3188 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1819#endif 3189#endif
1820#if EV_USE_KQUEUE 3190#if EV_USE_KQUEUE
1821 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3191 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3192#endif
3193#if EV_USE_IOURING
3194 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3195#endif
3196#if EV_USE_LINUXAIO
3197 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1822#endif 3198#endif
1823#if EV_USE_EPOLL 3199#if EV_USE_EPOLL
1824 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3200 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1825#endif 3201#endif
1826#if EV_USE_POLL 3202#if EV_USE_POLL
1827 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3203 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1828#endif 3204#endif
1829#if EV_USE_SELECT 3205#if EV_USE_SELECT
1830 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3206 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1831#endif 3207#endif
1832 3208
1833 for (i = NUMPRI; i--; ) 3209 for (i = NUMPRI; i--; )
1834 { 3210 {
1835 array_free (pending, [i]); 3211 array_free (pending, [i]);
… …
1877 3253
1878inline_size void 3254inline_size void
1879loop_fork (EV_P) 3255loop_fork (EV_P)
1880{ 3256{
1881#if EV_USE_PORT 3257#if EV_USE_PORT
1882 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3258 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1883#endif 3259#endif
1884#if EV_USE_KQUEUE 3260#if EV_USE_KQUEUE
1885 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3261 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3262#endif
3263#if EV_USE_IOURING
3264 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3265#endif
3266#if EV_USE_LINUXAIO
3267 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1886#endif 3268#endif
1887#if EV_USE_EPOLL 3269#if EV_USE_EPOLL
1888 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3270 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1889#endif 3271#endif
1890#if EV_USE_INOTIFY 3272#if EV_USE_INOTIFY
1891 infy_fork (EV_A); 3273 infy_fork (EV_A);
1892#endif 3274#endif
1893 3275
3276#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1894 if (ev_is_active (&pipe_w)) 3277 if (ev_is_active (&pipe_w) && postfork != 2)
1895 { 3278 {
1896 /* this "locks" the handlers against writing to the pipe */ 3279 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1897 /* while we modify the fd vars */
1898 sig_pending = 1;
1899#if EV_ASYNC_ENABLE
1900 async_pending = 1;
1901#endif
1902 3280
1903 ev_ref (EV_A); 3281 ev_ref (EV_A);
1904 ev_io_stop (EV_A_ &pipe_w); 3282 ev_io_stop (EV_A_ &pipe_w);
1905 3283
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 close (evfd);
1909#endif
1910
1911 if (evpipe [0] >= 0) 3284 if (evpipe [0] >= 0)
1912 {
1913 EV_WIN32_CLOSE_FD (evpipe [0]); 3285 EV_WIN32_CLOSE_FD (evpipe [0]);
1914 EV_WIN32_CLOSE_FD (evpipe [1]);
1915 }
1916 3286
1917#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1918 evpipe_init (EV_A); 3287 evpipe_init (EV_A);
1919 /* now iterate over everything, in case we missed something */ 3288 /* iterate over everything, in case we missed something before */
1920 pipecb (EV_A_ &pipe_w, EV_READ); 3289 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1921#endif
1922 } 3290 }
3291#endif
1923 3292
1924 postfork = 0; 3293 postfork = 0;
1925} 3294}
1926 3295
1927#if EV_MULTIPLICITY 3296#if EV_MULTIPLICITY
1928 3297
3298ecb_cold
1929struct ev_loop * 3299struct ev_loop *
1930ev_loop_new (unsigned int flags) 3300ev_loop_new (unsigned int flags) EV_NOEXCEPT
1931{ 3301{
1932 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3302 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933 3303
1934 memset (EV_A, 0, sizeof (struct ev_loop)); 3304 memset (EV_A, 0, sizeof (struct ev_loop));
1935 loop_init (EV_A_ flags); 3305 loop_init (EV_A_ flags);
… …
1942} 3312}
1943 3313
1944#endif /* multiplicity */ 3314#endif /* multiplicity */
1945 3315
1946#if EV_VERIFY 3316#if EV_VERIFY
1947static void noinline 3317ecb_noinline ecb_cold
3318static void
1948verify_watcher (EV_P_ W w) 3319verify_watcher (EV_P_ W w)
1949{ 3320{
1950 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3321 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951 3322
1952 if (w->pending) 3323 if (w->pending)
1953 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3324 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954} 3325}
1955 3326
1956static void noinline 3327ecb_noinline ecb_cold
3328static void
1957verify_heap (EV_P_ ANHE *heap, int N) 3329verify_heap (EV_P_ ANHE *heap, int N)
1958{ 3330{
1959 int i; 3331 int i;
1960 3332
1961 for (i = HEAP0; i < N + HEAP0; ++i) 3333 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1966 3338
1967 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3339 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968 } 3340 }
1969} 3341}
1970 3342
1971static void noinline 3343ecb_noinline ecb_cold
3344static void
1972array_verify (EV_P_ W *ws, int cnt) 3345array_verify (EV_P_ W *ws, int cnt)
1973{ 3346{
1974 while (cnt--) 3347 while (cnt--)
1975 { 3348 {
1976 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3349 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1978 } 3351 }
1979} 3352}
1980#endif 3353#endif
1981 3354
1982#if EV_FEATURE_API 3355#if EV_FEATURE_API
1983void 3356void ecb_cold
1984ev_verify (EV_P) 3357ev_verify (EV_P) EV_NOEXCEPT
1985{ 3358{
1986#if EV_VERIFY 3359#if EV_VERIFY
1987 int i; 3360 int i;
1988 WL w; 3361 WL w, w2;
1989 3362
1990 assert (activecnt >= -1); 3363 assert (activecnt >= -1);
1991 3364
1992 assert (fdchangemax >= fdchangecnt); 3365 assert (fdchangemax >= fdchangecnt);
1993 for (i = 0; i < fdchangecnt; ++i) 3366 for (i = 0; i < fdchangecnt; ++i)
1994 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3367 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1995 3368
1996 assert (anfdmax >= 0); 3369 assert (anfdmax >= 0);
1997 for (i = 0; i < anfdmax; ++i) 3370 for (i = 0; i < anfdmax; ++i)
3371 {
3372 int j = 0;
3373
1998 for (w = anfds [i].head; w; w = w->next) 3374 for (w = w2 = anfds [i].head; w; w = w->next)
1999 { 3375 {
2000 verify_watcher (EV_A_ (W)w); 3376 verify_watcher (EV_A_ (W)w);
3377
3378 if (j++ & 1)
3379 {
3380 assert (("libev: io watcher list contains a loop", w != w2));
3381 w2 = w2->next;
3382 }
3383
2001 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3384 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2002 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3385 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2003 } 3386 }
3387 }
2004 3388
2005 assert (timermax >= timercnt); 3389 assert (timermax >= timercnt);
2006 verify_heap (EV_A_ timers, timercnt); 3390 verify_heap (EV_A_ timers, timercnt);
2007 3391
2008#if EV_PERIODIC_ENABLE 3392#if EV_PERIODIC_ENABLE
… …
2054#endif 3438#endif
2055} 3439}
2056#endif 3440#endif
2057 3441
2058#if EV_MULTIPLICITY 3442#if EV_MULTIPLICITY
3443ecb_cold
2059struct ev_loop * 3444struct ev_loop *
2060#else 3445#else
2061int 3446int
2062#endif 3447#endif
2063ev_default_loop (unsigned int flags) 3448ev_default_loop (unsigned int flags) EV_NOEXCEPT
2064{ 3449{
2065 if (!ev_default_loop_ptr) 3450 if (!ev_default_loop_ptr)
2066 { 3451 {
2067#if EV_MULTIPLICITY 3452#if EV_MULTIPLICITY
2068 EV_P = ev_default_loop_ptr = &default_loop_struct; 3453 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2087 3472
2088 return ev_default_loop_ptr; 3473 return ev_default_loop_ptr;
2089} 3474}
2090 3475
2091void 3476void
2092ev_loop_fork (EV_P) 3477ev_loop_fork (EV_P) EV_NOEXCEPT
2093{ 3478{
2094 postfork = 1; /* must be in line with ev_default_fork */ 3479 postfork = 1;
2095} 3480}
2096 3481
2097/*****************************************************************************/ 3482/*****************************************************************************/
2098 3483
2099void 3484void
… …
2101{ 3486{
2102 EV_CB_INVOKE ((W)w, revents); 3487 EV_CB_INVOKE ((W)w, revents);
2103} 3488}
2104 3489
2105unsigned int 3490unsigned int
2106ev_pending_count (EV_P) 3491ev_pending_count (EV_P) EV_NOEXCEPT
2107{ 3492{
2108 int pri; 3493 int pri;
2109 unsigned int count = 0; 3494 unsigned int count = 0;
2110 3495
2111 for (pri = NUMPRI; pri--; ) 3496 for (pri = NUMPRI; pri--; )
2112 count += pendingcnt [pri]; 3497 count += pendingcnt [pri];
2113 3498
2114 return count; 3499 return count;
2115} 3500}
2116 3501
2117void noinline 3502ecb_noinline
3503void
2118ev_invoke_pending (EV_P) 3504ev_invoke_pending (EV_P)
2119{ 3505{
2120 int pri; 3506 pendingpri = NUMPRI;
2121 3507
2122 for (pri = NUMPRI; pri--; ) 3508 do
3509 {
3510 --pendingpri;
3511
3512 /* pendingpri possibly gets modified in the inner loop */
2123 while (pendingcnt [pri]) 3513 while (pendingcnt [pendingpri])
2124 { 3514 {
2125 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3515 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2126 3516
2127 p->w->pending = 0; 3517 p->w->pending = 0;
2128 EV_CB_INVOKE (p->w, p->events); 3518 EV_CB_INVOKE (p->w, p->events);
2129 EV_FREQUENT_CHECK; 3519 EV_FREQUENT_CHECK;
2130 } 3520 }
3521 }
3522 while (pendingpri);
2131} 3523}
2132 3524
2133#if EV_IDLE_ENABLE 3525#if EV_IDLE_ENABLE
2134/* make idle watchers pending. this handles the "call-idle */ 3526/* make idle watchers pending. this handles the "call-idle */
2135/* only when higher priorities are idle" logic */ 3527/* only when higher priorities are idle" logic */
2136inline_size void 3528inline_size void
2137idle_reify (EV_P) 3529idle_reify (EV_P)
2138{ 3530{
2139 if (expect_false (idleall)) 3531 if (ecb_expect_false (idleall))
2140 { 3532 {
2141 int pri; 3533 int pri;
2142 3534
2143 for (pri = NUMPRI; pri--; ) 3535 for (pri = NUMPRI; pri--; )
2144 { 3536 {
… …
2174 { 3566 {
2175 ev_at (w) += w->repeat; 3567 ev_at (w) += w->repeat;
2176 if (ev_at (w) < mn_now) 3568 if (ev_at (w) < mn_now)
2177 ev_at (w) = mn_now; 3569 ev_at (w) = mn_now;
2178 3570
2179 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3571 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
2180 3572
2181 ANHE_at_cache (timers [HEAP0]); 3573 ANHE_at_cache (timers [HEAP0]);
2182 downheap (timers, timercnt, HEAP0); 3574 downheap (timers, timercnt, HEAP0);
2183 } 3575 }
2184 else 3576 else
… …
2193 } 3585 }
2194} 3586}
2195 3587
2196#if EV_PERIODIC_ENABLE 3588#if EV_PERIODIC_ENABLE
2197 3589
2198inline_speed 3590ecb_noinline
3591static void
2199periodic_recalc (EV_P_ ev_periodic *w) 3592periodic_recalc (EV_P_ ev_periodic *w)
2200{ 3593{
2201 /* TODO: use slow but potentially more correct incremental algo, */ 3594 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202 /* also do not rely on ceil */ 3595 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2203 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3596
3597 /* the above almost always errs on the low side */
3598 while (at <= ev_rt_now)
3599 {
3600 ev_tstamp nat = at + w->interval;
3601
3602 /* when resolution fails us, we use ev_rt_now */
3603 if (ecb_expect_false (nat == at))
3604 {
3605 at = ev_rt_now;
3606 break;
3607 }
3608
3609 at = nat;
3610 }
3611
3612 ev_at (w) = at;
2204} 3613}
2205 3614
2206/* make periodics pending */ 3615/* make periodics pending */
2207inline_size void 3616inline_size void
2208periodics_reify (EV_P) 3617periodics_reify (EV_P)
2209{ 3618{
2210 EV_FREQUENT_CHECK; 3619 EV_FREQUENT_CHECK;
2211 3620
2212 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3621 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2213 { 3622 {
2214 int feed_count = 0;
2215
2216 do 3623 do
2217 { 3624 {
2218 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3625 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2219 3626
2220 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3627 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2230 downheap (periodics, periodiccnt, HEAP0); 3637 downheap (periodics, periodiccnt, HEAP0);
2231 } 3638 }
2232 else if (w->interval) 3639 else if (w->interval)
2233 { 3640 {
2234 periodic_recalc (EV_A_ w); 3641 periodic_recalc (EV_A_ w);
2235
2236 /* if next trigger time is not sufficiently in the future, put it there */
2237 /* this might happen because of floating point inexactness */
2238 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2239 {
2240 ev_at (w) += w->interval;
2241
2242 /* if interval is unreasonably low we might still have a time in the past */
2243 /* so correct this. this will make the periodic very inexact, but the user */
2244 /* has effectively asked to get triggered more often than possible */
2245 if (ev_at (w) < ev_rt_now)
2246 ev_at (w) = ev_rt_now;
2247 }
2248
2249 ANHE_at_cache (periodics [HEAP0]); 3642 ANHE_at_cache (periodics [HEAP0]);
2250 downheap (periodics, periodiccnt, HEAP0); 3643 downheap (periodics, periodiccnt, HEAP0);
2251 } 3644 }
2252 else 3645 else
2253 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3646 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2261 } 3654 }
2262} 3655}
2263 3656
2264/* simply recalculate all periodics */ 3657/* simply recalculate all periodics */
2265/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3658/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266static void noinline 3659ecb_noinline ecb_cold
3660static void
2267periodics_reschedule (EV_P) 3661periodics_reschedule (EV_P)
2268{ 3662{
2269 int i; 3663 int i;
2270 3664
2271 /* adjust periodics after time jump */ 3665 /* adjust periodics after time jump */
… …
2284 reheap (periodics, periodiccnt); 3678 reheap (periodics, periodiccnt);
2285} 3679}
2286#endif 3680#endif
2287 3681
2288/* adjust all timers by a given offset */ 3682/* adjust all timers by a given offset */
2289static void noinline 3683ecb_noinline ecb_cold
3684static void
2290timers_reschedule (EV_P_ ev_tstamp adjust) 3685timers_reschedule (EV_P_ ev_tstamp adjust)
2291{ 3686{
2292 int i; 3687 int i;
2293 3688
2294 for (i = 0; i < timercnt; ++i) 3689 for (i = 0; i < timercnt; ++i)
… …
2303/* also detect if there was a timejump, and act accordingly */ 3698/* also detect if there was a timejump, and act accordingly */
2304inline_speed void 3699inline_speed void
2305time_update (EV_P_ ev_tstamp max_block) 3700time_update (EV_P_ ev_tstamp max_block)
2306{ 3701{
2307#if EV_USE_MONOTONIC 3702#if EV_USE_MONOTONIC
2308 if (expect_true (have_monotonic)) 3703 if (ecb_expect_true (have_monotonic))
2309 { 3704 {
2310 int i; 3705 int i;
2311 ev_tstamp odiff = rtmn_diff; 3706 ev_tstamp odiff = rtmn_diff;
2312 3707
2313 mn_now = get_clock (); 3708 mn_now = get_clock ();
2314 3709
2315 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3710 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2316 /* interpolate in the meantime */ 3711 /* interpolate in the meantime */
2317 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3712 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
2318 { 3713 {
2319 ev_rt_now = rtmn_diff + mn_now; 3714 ev_rt_now = rtmn_diff + mn_now;
2320 return; 3715 return;
2321 } 3716 }
2322 3717
… …
2331 * doesn't hurt either as we only do this on time-jumps or 3726 * doesn't hurt either as we only do this on time-jumps or
2332 * in the unlikely event of having been preempted here. 3727 * in the unlikely event of having been preempted here.
2333 */ 3728 */
2334 for (i = 4; --i; ) 3729 for (i = 4; --i; )
2335 { 3730 {
3731 ev_tstamp diff;
2336 rtmn_diff = ev_rt_now - mn_now; 3732 rtmn_diff = ev_rt_now - mn_now;
2337 3733
2338 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3734 diff = odiff - rtmn_diff;
3735
3736 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
2339 return; /* all is well */ 3737 return; /* all is well */
2340 3738
2341 ev_rt_now = ev_time (); 3739 ev_rt_now = ev_time ();
2342 mn_now = get_clock (); 3740 mn_now = get_clock ();
2343 now_floor = mn_now; 3741 now_floor = mn_now;
… …
2352 else 3750 else
2353#endif 3751#endif
2354 { 3752 {
2355 ev_rt_now = ev_time (); 3753 ev_rt_now = ev_time ();
2356 3754
2357 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3755 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
2358 { 3756 {
2359 /* adjust timers. this is easy, as the offset is the same for all of them */ 3757 /* adjust timers. this is easy, as the offset is the same for all of them */
2360 timers_reschedule (EV_A_ ev_rt_now - mn_now); 3758 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2361#if EV_PERIODIC_ENABLE 3759#if EV_PERIODIC_ENABLE
2362 periodics_reschedule (EV_A); 3760 periodics_reschedule (EV_A);
… …
2365 3763
2366 mn_now = ev_rt_now; 3764 mn_now = ev_rt_now;
2367 } 3765 }
2368} 3766}
2369 3767
2370void 3768int
2371ev_run (EV_P_ int flags) 3769ev_run (EV_P_ int flags)
2372{ 3770{
2373#if EV_FEATURE_API 3771#if EV_FEATURE_API
2374 ++loop_depth; 3772 ++loop_depth;
2375#endif 3773#endif
… …
2385#if EV_VERIFY >= 2 3783#if EV_VERIFY >= 2
2386 ev_verify (EV_A); 3784 ev_verify (EV_A);
2387#endif 3785#endif
2388 3786
2389#ifndef _WIN32 3787#ifndef _WIN32
2390 if (expect_false (curpid)) /* penalise the forking check even more */ 3788 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2391 if (expect_false (getpid () != curpid)) 3789 if (ecb_expect_false (getpid () != curpid))
2392 { 3790 {
2393 curpid = getpid (); 3791 curpid = getpid ();
2394 postfork = 1; 3792 postfork = 1;
2395 } 3793 }
2396#endif 3794#endif
2397 3795
2398#if EV_FORK_ENABLE 3796#if EV_FORK_ENABLE
2399 /* we might have forked, so queue fork handlers */ 3797 /* we might have forked, so queue fork handlers */
2400 if (expect_false (postfork)) 3798 if (ecb_expect_false (postfork))
2401 if (forkcnt) 3799 if (forkcnt)
2402 { 3800 {
2403 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3801 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2404 EV_INVOKE_PENDING; 3802 EV_INVOKE_PENDING;
2405 } 3803 }
2406#endif 3804#endif
2407 3805
2408#if EV_PREPARE_ENABLE 3806#if EV_PREPARE_ENABLE
2409 /* queue prepare watchers (and execute them) */ 3807 /* queue prepare watchers (and execute them) */
2410 if (expect_false (preparecnt)) 3808 if (ecb_expect_false (preparecnt))
2411 { 3809 {
2412 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3810 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2413 EV_INVOKE_PENDING; 3811 EV_INVOKE_PENDING;
2414 } 3812 }
2415#endif 3813#endif
2416 3814
2417 if (expect_false (loop_done)) 3815 if (ecb_expect_false (loop_done))
2418 break; 3816 break;
2419 3817
2420 /* we might have forked, so reify kernel state if necessary */ 3818 /* we might have forked, so reify kernel state if necessary */
2421 if (expect_false (postfork)) 3819 if (ecb_expect_false (postfork))
2422 loop_fork (EV_A); 3820 loop_fork (EV_A);
2423 3821
2424 /* update fd-related kernel structures */ 3822 /* update fd-related kernel structures */
2425 fd_reify (EV_A); 3823 fd_reify (EV_A);
2426 3824
… …
2431 3829
2432 /* remember old timestamp for io_blocktime calculation */ 3830 /* remember old timestamp for io_blocktime calculation */
2433 ev_tstamp prev_mn_now = mn_now; 3831 ev_tstamp prev_mn_now = mn_now;
2434 3832
2435 /* update time to cancel out callback processing overhead */ 3833 /* update time to cancel out callback processing overhead */
2436 time_update (EV_A_ 1e100); 3834 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
2437 3835
3836 /* from now on, we want a pipe-wake-up */
3837 pipe_write_wanted = 1;
3838
3839 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3840
2438 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3841 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2439 { 3842 {
2440 waittime = MAX_BLOCKTIME; 3843 waittime = EV_TS_CONST (MAX_BLOCKTIME);
2441 3844
2442 if (timercnt) 3845 if (timercnt)
2443 { 3846 {
2444 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3847 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445 if (waittime > to) waittime = to; 3848 if (waittime > to) waittime = to;
2446 } 3849 }
2447 3850
2448#if EV_PERIODIC_ENABLE 3851#if EV_PERIODIC_ENABLE
2449 if (periodiccnt) 3852 if (periodiccnt)
2450 { 3853 {
2451 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3854 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452 if (waittime > to) waittime = to; 3855 if (waittime > to) waittime = to;
2453 } 3856 }
2454#endif 3857#endif
2455 3858
2456 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3859 /* don't let timeouts decrease the waittime below timeout_blocktime */
2457 if (expect_false (waittime < timeout_blocktime)) 3860 if (ecb_expect_false (waittime < timeout_blocktime))
2458 waittime = timeout_blocktime; 3861 waittime = timeout_blocktime;
2459 3862
3863 /* at this point, we NEED to wait, so we have to ensure */
3864 /* to pass a minimum nonzero value to the backend */
3865 if (ecb_expect_false (waittime < backend_mintime))
3866 waittime = backend_mintime;
3867
2460 /* extra check because io_blocktime is commonly 0 */ 3868 /* extra check because io_blocktime is commonly 0 */
2461 if (expect_false (io_blocktime)) 3869 if (ecb_expect_false (io_blocktime))
2462 { 3870 {
2463 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3871 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464 3872
2465 if (sleeptime > waittime - backend_fudge) 3873 if (sleeptime > waittime - backend_mintime)
2466 sleeptime = waittime - backend_fudge; 3874 sleeptime = waittime - backend_mintime;
2467 3875
2468 if (expect_true (sleeptime > 0.)) 3876 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2469 { 3877 {
2470 ev_sleep (sleeptime); 3878 ev_sleep (sleeptime);
2471 waittime -= sleeptime; 3879 waittime -= sleeptime;
2472 } 3880 }
2473 } 3881 }
… …
2478#endif 3886#endif
2479 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3887 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480 backend_poll (EV_A_ waittime); 3888 backend_poll (EV_A_ waittime);
2481 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3889 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2482 3890
3891 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3892
3893 ECB_MEMORY_FENCE_ACQUIRE;
3894 if (pipe_write_skipped)
3895 {
3896 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3897 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3898 }
3899
2483 /* update ev_rt_now, do magic */ 3900 /* update ev_rt_now, do magic */
2484 time_update (EV_A_ waittime + sleeptime); 3901 time_update (EV_A_ waittime + sleeptime);
2485 } 3902 }
2486 3903
2487 /* queue pending timers and reschedule them */ 3904 /* queue pending timers and reschedule them */
… …
2495 idle_reify (EV_A); 3912 idle_reify (EV_A);
2496#endif 3913#endif
2497 3914
2498#if EV_CHECK_ENABLE 3915#if EV_CHECK_ENABLE
2499 /* queue check watchers, to be executed first */ 3916 /* queue check watchers, to be executed first */
2500 if (expect_false (checkcnt)) 3917 if (ecb_expect_false (checkcnt))
2501 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3918 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2502#endif 3919#endif
2503 3920
2504 EV_INVOKE_PENDING; 3921 EV_INVOKE_PENDING;
2505 } 3922 }
2506 while (expect_true ( 3923 while (ecb_expect_true (
2507 activecnt 3924 activecnt
2508 && !loop_done 3925 && !loop_done
2509 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) 3926 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2510 )); 3927 ));
2511 3928
… …
2513 loop_done = EVBREAK_CANCEL; 3930 loop_done = EVBREAK_CANCEL;
2514 3931
2515#if EV_FEATURE_API 3932#if EV_FEATURE_API
2516 --loop_depth; 3933 --loop_depth;
2517#endif 3934#endif
2518}
2519 3935
3936 return activecnt;
3937}
3938
2520void 3939void
2521ev_break (EV_P_ int how) 3940ev_break (EV_P_ int how) EV_NOEXCEPT
2522{ 3941{
2523 loop_done = how; 3942 loop_done = how;
2524} 3943}
2525 3944
2526void 3945void
2527ev_ref (EV_P) 3946ev_ref (EV_P) EV_NOEXCEPT
2528{ 3947{
2529 ++activecnt; 3948 ++activecnt;
2530} 3949}
2531 3950
2532void 3951void
2533ev_unref (EV_P) 3952ev_unref (EV_P) EV_NOEXCEPT
2534{ 3953{
2535 --activecnt; 3954 --activecnt;
2536} 3955}
2537 3956
2538void 3957void
2539ev_now_update (EV_P) 3958ev_now_update (EV_P) EV_NOEXCEPT
2540{ 3959{
2541 time_update (EV_A_ 1e100); 3960 time_update (EV_A_ EV_TSTAMP_HUGE);
2542} 3961}
2543 3962
2544void 3963void
2545ev_suspend (EV_P) 3964ev_suspend (EV_P) EV_NOEXCEPT
2546{ 3965{
2547 ev_now_update (EV_A); 3966 ev_now_update (EV_A);
2548} 3967}
2549 3968
2550void 3969void
2551ev_resume (EV_P) 3970ev_resume (EV_P) EV_NOEXCEPT
2552{ 3971{
2553 ev_tstamp mn_prev = mn_now; 3972 ev_tstamp mn_prev = mn_now;
2554 3973
2555 ev_now_update (EV_A); 3974 ev_now_update (EV_A);
2556 timers_reschedule (EV_A_ mn_now - mn_prev); 3975 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2573inline_size void 3992inline_size void
2574wlist_del (WL *head, WL elem) 3993wlist_del (WL *head, WL elem)
2575{ 3994{
2576 while (*head) 3995 while (*head)
2577 { 3996 {
2578 if (expect_true (*head == elem)) 3997 if (ecb_expect_true (*head == elem))
2579 { 3998 {
2580 *head = elem->next; 3999 *head = elem->next;
2581 break; 4000 break;
2582 } 4001 }
2583 4002
… …
2595 w->pending = 0; 4014 w->pending = 0;
2596 } 4015 }
2597} 4016}
2598 4017
2599int 4018int
2600ev_clear_pending (EV_P_ void *w) 4019ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2601{ 4020{
2602 W w_ = (W)w; 4021 W w_ = (W)w;
2603 int pending = w_->pending; 4022 int pending = w_->pending;
2604 4023
2605 if (expect_true (pending)) 4024 if (ecb_expect_true (pending))
2606 { 4025 {
2607 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4026 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2608 p->w = (W)&pending_w; 4027 p->w = (W)&pending_w;
2609 w_->pending = 0; 4028 w_->pending = 0;
2610 return p->events; 4029 return p->events;
… …
2637 w->active = 0; 4056 w->active = 0;
2638} 4057}
2639 4058
2640/*****************************************************************************/ 4059/*****************************************************************************/
2641 4060
2642void noinline 4061ecb_noinline
4062void
2643ev_io_start (EV_P_ ev_io *w) 4063ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2644{ 4064{
2645 int fd = w->fd; 4065 int fd = w->fd;
2646 4066
2647 if (expect_false (ev_is_active (w))) 4067 if (ecb_expect_false (ev_is_active (w)))
2648 return; 4068 return;
2649 4069
2650 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4070 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2651 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4071 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2652 4072
4073#if EV_VERIFY >= 2
4074 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4075#endif
2653 EV_FREQUENT_CHECK; 4076 EV_FREQUENT_CHECK;
2654 4077
2655 ev_start (EV_A_ (W)w, 1); 4078 ev_start (EV_A_ (W)w, 1);
2656 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4079 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2657 wlist_add (&anfds[fd].head, (WL)w); 4080 wlist_add (&anfds[fd].head, (WL)w);
4081
4082 /* common bug, apparently */
4083 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2658 4084
2659 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4085 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2660 w->events &= ~EV__IOFDSET; 4086 w->events &= ~EV__IOFDSET;
2661 4087
2662 EV_FREQUENT_CHECK; 4088 EV_FREQUENT_CHECK;
2663} 4089}
2664 4090
2665void noinline 4091ecb_noinline
4092void
2666ev_io_stop (EV_P_ ev_io *w) 4093ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2667{ 4094{
2668 clear_pending (EV_A_ (W)w); 4095 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w))) 4096 if (ecb_expect_false (!ev_is_active (w)))
2670 return; 4097 return;
2671 4098
2672 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4099 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2673 4100
4101#if EV_VERIFY >= 2
4102 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4103#endif
2674 EV_FREQUENT_CHECK; 4104 EV_FREQUENT_CHECK;
2675 4105
2676 wlist_del (&anfds[w->fd].head, (WL)w); 4106 wlist_del (&anfds[w->fd].head, (WL)w);
2677 ev_stop (EV_A_ (W)w); 4107 ev_stop (EV_A_ (W)w);
2678 4108
2679 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 4109 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2680 4110
2681 EV_FREQUENT_CHECK; 4111 EV_FREQUENT_CHECK;
2682} 4112}
2683 4113
2684void noinline 4114ecb_noinline
4115void
2685ev_timer_start (EV_P_ ev_timer *w) 4116ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2686{ 4117{
2687 if (expect_false (ev_is_active (w))) 4118 if (ecb_expect_false (ev_is_active (w)))
2688 return; 4119 return;
2689 4120
2690 ev_at (w) += mn_now; 4121 ev_at (w) += mn_now;
2691 4122
2692 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4123 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2693 4124
2694 EV_FREQUENT_CHECK; 4125 EV_FREQUENT_CHECK;
2695 4126
2696 ++timercnt; 4127 ++timercnt;
2697 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4128 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2698 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4129 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2699 ANHE_w (timers [ev_active (w)]) = (WT)w; 4130 ANHE_w (timers [ev_active (w)]) = (WT)w;
2700 ANHE_at_cache (timers [ev_active (w)]); 4131 ANHE_at_cache (timers [ev_active (w)]);
2701 upheap (timers, ev_active (w)); 4132 upheap (timers, ev_active (w));
2702 4133
2703 EV_FREQUENT_CHECK; 4134 EV_FREQUENT_CHECK;
2704 4135
2705 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4136 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2706} 4137}
2707 4138
2708void noinline 4139ecb_noinline
4140void
2709ev_timer_stop (EV_P_ ev_timer *w) 4141ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2710{ 4142{
2711 clear_pending (EV_A_ (W)w); 4143 clear_pending (EV_A_ (W)w);
2712 if (expect_false (!ev_is_active (w))) 4144 if (ecb_expect_false (!ev_is_active (w)))
2713 return; 4145 return;
2714 4146
2715 EV_FREQUENT_CHECK; 4147 EV_FREQUENT_CHECK;
2716 4148
2717 { 4149 {
… …
2719 4151
2720 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4152 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2721 4153
2722 --timercnt; 4154 --timercnt;
2723 4155
2724 if (expect_true (active < timercnt + HEAP0)) 4156 if (ecb_expect_true (active < timercnt + HEAP0))
2725 { 4157 {
2726 timers [active] = timers [timercnt + HEAP0]; 4158 timers [active] = timers [timercnt + HEAP0];
2727 adjustheap (timers, timercnt, active); 4159 adjustheap (timers, timercnt, active);
2728 } 4160 }
2729 } 4161 }
… …
2733 ev_stop (EV_A_ (W)w); 4165 ev_stop (EV_A_ (W)w);
2734 4166
2735 EV_FREQUENT_CHECK; 4167 EV_FREQUENT_CHECK;
2736} 4168}
2737 4169
2738void noinline 4170ecb_noinline
4171void
2739ev_timer_again (EV_P_ ev_timer *w) 4172ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2740{ 4173{
2741 EV_FREQUENT_CHECK; 4174 EV_FREQUENT_CHECK;
4175
4176 clear_pending (EV_A_ (W)w);
2742 4177
2743 if (ev_is_active (w)) 4178 if (ev_is_active (w))
2744 { 4179 {
2745 if (w->repeat) 4180 if (w->repeat)
2746 { 4181 {
… …
2759 4194
2760 EV_FREQUENT_CHECK; 4195 EV_FREQUENT_CHECK;
2761} 4196}
2762 4197
2763ev_tstamp 4198ev_tstamp
2764ev_timer_remaining (EV_P_ ev_timer *w) 4199ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2765{ 4200{
2766 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4201 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
2767} 4202}
2768 4203
2769#if EV_PERIODIC_ENABLE 4204#if EV_PERIODIC_ENABLE
2770void noinline 4205ecb_noinline
4206void
2771ev_periodic_start (EV_P_ ev_periodic *w) 4207ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2772{ 4208{
2773 if (expect_false (ev_is_active (w))) 4209 if (ecb_expect_false (ev_is_active (w)))
2774 return; 4210 return;
2775 4211
2776 if (w->reschedule_cb) 4212 if (w->reschedule_cb)
2777 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4213 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2778 else if (w->interval) 4214 else if (w->interval)
… …
2785 4221
2786 EV_FREQUENT_CHECK; 4222 EV_FREQUENT_CHECK;
2787 4223
2788 ++periodiccnt; 4224 ++periodiccnt;
2789 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4225 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2790 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4226 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2791 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4227 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2792 ANHE_at_cache (periodics [ev_active (w)]); 4228 ANHE_at_cache (periodics [ev_active (w)]);
2793 upheap (periodics, ev_active (w)); 4229 upheap (periodics, ev_active (w));
2794 4230
2795 EV_FREQUENT_CHECK; 4231 EV_FREQUENT_CHECK;
2796 4232
2797 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4233 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2798} 4234}
2799 4235
2800void noinline 4236ecb_noinline
4237void
2801ev_periodic_stop (EV_P_ ev_periodic *w) 4238ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2802{ 4239{
2803 clear_pending (EV_A_ (W)w); 4240 clear_pending (EV_A_ (W)w);
2804 if (expect_false (!ev_is_active (w))) 4241 if (ecb_expect_false (!ev_is_active (w)))
2805 return; 4242 return;
2806 4243
2807 EV_FREQUENT_CHECK; 4244 EV_FREQUENT_CHECK;
2808 4245
2809 { 4246 {
… …
2811 4248
2812 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4249 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2813 4250
2814 --periodiccnt; 4251 --periodiccnt;
2815 4252
2816 if (expect_true (active < periodiccnt + HEAP0)) 4253 if (ecb_expect_true (active < periodiccnt + HEAP0))
2817 { 4254 {
2818 periodics [active] = periodics [periodiccnt + HEAP0]; 4255 periodics [active] = periodics [periodiccnt + HEAP0];
2819 adjustheap (periodics, periodiccnt, active); 4256 adjustheap (periodics, periodiccnt, active);
2820 } 4257 }
2821 } 4258 }
… …
2823 ev_stop (EV_A_ (W)w); 4260 ev_stop (EV_A_ (W)w);
2824 4261
2825 EV_FREQUENT_CHECK; 4262 EV_FREQUENT_CHECK;
2826} 4263}
2827 4264
2828void noinline 4265ecb_noinline
4266void
2829ev_periodic_again (EV_P_ ev_periodic *w) 4267ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2830{ 4268{
2831 /* TODO: use adjustheap and recalculation */ 4269 /* TODO: use adjustheap and recalculation */
2832 ev_periodic_stop (EV_A_ w); 4270 ev_periodic_stop (EV_A_ w);
2833 ev_periodic_start (EV_A_ w); 4271 ev_periodic_start (EV_A_ w);
2834} 4272}
… …
2838# define SA_RESTART 0 4276# define SA_RESTART 0
2839#endif 4277#endif
2840 4278
2841#if EV_SIGNAL_ENABLE 4279#if EV_SIGNAL_ENABLE
2842 4280
2843void noinline 4281ecb_noinline
4282void
2844ev_signal_start (EV_P_ ev_signal *w) 4283ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2845{ 4284{
2846 if (expect_false (ev_is_active (w))) 4285 if (ecb_expect_false (ev_is_active (w)))
2847 return; 4286 return;
2848 4287
2849 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4288 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2850 4289
2851#if EV_MULTIPLICITY 4290#if EV_MULTIPLICITY
2852 assert (("libev: a signal must not be attached to two different loops", 4291 assert (("libev: a signal must not be attached to two different loops",
2853 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4292 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2854 4293
2855 signals [w->signum - 1].loop = EV_A; 4294 signals [w->signum - 1].loop = EV_A;
4295 ECB_MEMORY_FENCE_RELEASE;
2856#endif 4296#endif
2857 4297
2858 EV_FREQUENT_CHECK; 4298 EV_FREQUENT_CHECK;
2859 4299
2860#if EV_USE_SIGNALFD 4300#if EV_USE_SIGNALFD
… …
2919 } 4359 }
2920 4360
2921 EV_FREQUENT_CHECK; 4361 EV_FREQUENT_CHECK;
2922} 4362}
2923 4363
2924void noinline 4364ecb_noinline
4365void
2925ev_signal_stop (EV_P_ ev_signal *w) 4366ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2926{ 4367{
2927 clear_pending (EV_A_ (W)w); 4368 clear_pending (EV_A_ (W)w);
2928 if (expect_false (!ev_is_active (w))) 4369 if (ecb_expect_false (!ev_is_active (w)))
2929 return; 4370 return;
2930 4371
2931 EV_FREQUENT_CHECK; 4372 EV_FREQUENT_CHECK;
2932 4373
2933 wlist_del (&signals [w->signum - 1].head, (WL)w); 4374 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
2961#endif 4402#endif
2962 4403
2963#if EV_CHILD_ENABLE 4404#if EV_CHILD_ENABLE
2964 4405
2965void 4406void
2966ev_child_start (EV_P_ ev_child *w) 4407ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2967{ 4408{
2968#if EV_MULTIPLICITY 4409#if EV_MULTIPLICITY
2969 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4410 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2970#endif 4411#endif
2971 if (expect_false (ev_is_active (w))) 4412 if (ecb_expect_false (ev_is_active (w)))
2972 return; 4413 return;
2973 4414
2974 EV_FREQUENT_CHECK; 4415 EV_FREQUENT_CHECK;
2975 4416
2976 ev_start (EV_A_ (W)w, 1); 4417 ev_start (EV_A_ (W)w, 1);
… …
2978 4419
2979 EV_FREQUENT_CHECK; 4420 EV_FREQUENT_CHECK;
2980} 4421}
2981 4422
2982void 4423void
2983ev_child_stop (EV_P_ ev_child *w) 4424ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2984{ 4425{
2985 clear_pending (EV_A_ (W)w); 4426 clear_pending (EV_A_ (W)w);
2986 if (expect_false (!ev_is_active (w))) 4427 if (ecb_expect_false (!ev_is_active (w)))
2987 return; 4428 return;
2988 4429
2989 EV_FREQUENT_CHECK; 4430 EV_FREQUENT_CHECK;
2990 4431
2991 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); 4432 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
… …
3005 4446
3006#define DEF_STAT_INTERVAL 5.0074891 4447#define DEF_STAT_INTERVAL 5.0074891
3007#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4448#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3008#define MIN_STAT_INTERVAL 0.1074891 4449#define MIN_STAT_INTERVAL 0.1074891
3009 4450
3010static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4451ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3011 4452
3012#if EV_USE_INOTIFY 4453#if EV_USE_INOTIFY
3013 4454
3014/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4455/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3015# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4456# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3016 4457
3017static void noinline 4458ecb_noinline
4459static void
3018infy_add (EV_P_ ev_stat *w) 4460infy_add (EV_P_ ev_stat *w)
3019{ 4461{
3020 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); 4462 w->wd = inotify_add_watch (fs_fd, w->path,
4463 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4464 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4465 | IN_DONT_FOLLOW | IN_MASK_ADD);
3021 4466
3022 if (w->wd >= 0) 4467 if (w->wd >= 0)
3023 { 4468 {
3024 struct statfs sfs; 4469 struct statfs sfs;
3025 4470
… …
3029 4474
3030 if (!fs_2625) 4475 if (!fs_2625)
3031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4476 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3032 else if (!statfs (w->path, &sfs) 4477 else if (!statfs (w->path, &sfs)
3033 && (sfs.f_type == 0x1373 /* devfs */ 4478 && (sfs.f_type == 0x1373 /* devfs */
4479 || sfs.f_type == 0x4006 /* fat */
4480 || sfs.f_type == 0x4d44 /* msdos */
3034 || sfs.f_type == 0xEF53 /* ext2/3 */ 4481 || sfs.f_type == 0xEF53 /* ext2/3 */
4482 || sfs.f_type == 0x72b6 /* jffs2 */
4483 || sfs.f_type == 0x858458f6 /* ramfs */
4484 || sfs.f_type == 0x5346544e /* ntfs */
3035 || sfs.f_type == 0x3153464a /* jfs */ 4485 || sfs.f_type == 0x3153464a /* jfs */
4486 || sfs.f_type == 0x9123683e /* btrfs */
3036 || sfs.f_type == 0x52654973 /* reiser3 */ 4487 || sfs.f_type == 0x52654973 /* reiser3 */
3037 || sfs.f_type == 0x01021994 /* tempfs */ 4488 || sfs.f_type == 0x01021994 /* tmpfs */
3038 || sfs.f_type == 0x58465342 /* xfs */)) 4489 || sfs.f_type == 0x58465342 /* xfs */))
3039 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4490 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3040 else 4491 else
3041 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4492 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3042 } 4493 }
… …
3063 if (!pend || pend == path) 4514 if (!pend || pend == path)
3064 break; 4515 break;
3065 4516
3066 *pend = 0; 4517 *pend = 0;
3067 w->wd = inotify_add_watch (fs_fd, path, mask); 4518 w->wd = inotify_add_watch (fs_fd, path, mask);
3068 } 4519 }
3069 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4520 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3070 } 4521 }
3071 } 4522 }
3072 4523
3073 if (w->wd >= 0) 4524 if (w->wd >= 0)
… …
3077 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4528 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3078 ev_timer_again (EV_A_ &w->timer); 4529 ev_timer_again (EV_A_ &w->timer);
3079 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4530 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3080} 4531}
3081 4532
3082static void noinline 4533ecb_noinline
4534static void
3083infy_del (EV_P_ ev_stat *w) 4535infy_del (EV_P_ ev_stat *w)
3084{ 4536{
3085 int slot; 4537 int slot;
3086 int wd = w->wd; 4538 int wd = w->wd;
3087 4539
… …
3094 4546
3095 /* remove this watcher, if others are watching it, they will rearm */ 4547 /* remove this watcher, if others are watching it, they will rearm */
3096 inotify_rm_watch (fs_fd, wd); 4548 inotify_rm_watch (fs_fd, wd);
3097} 4549}
3098 4550
3099static void noinline 4551ecb_noinline
4552static void
3100infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4553infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3101{ 4554{
3102 if (slot < 0) 4555 if (slot < 0)
3103 /* overflow, need to check for all hash slots */ 4556 /* overflow, need to check for all hash slots */
3104 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4557 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3140 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4593 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141 ofs += sizeof (struct inotify_event) + ev->len; 4594 ofs += sizeof (struct inotify_event) + ev->len;
3142 } 4595 }
3143} 4596}
3144 4597
3145inline_size void 4598inline_size ecb_cold
4599void
3146ev_check_2625 (EV_P) 4600ev_check_2625 (EV_P)
3147{ 4601{
3148 /* kernels < 2.6.25 are borked 4602 /* kernels < 2.6.25 are borked
3149 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4603 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150 */ 4604 */
… …
3155} 4609}
3156 4610
3157inline_size int 4611inline_size int
3158infy_newfd (void) 4612infy_newfd (void)
3159{ 4613{
3160#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4614#if defined IN_CLOEXEC && defined IN_NONBLOCK
3161 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4615 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3162 if (fd >= 0) 4616 if (fd >= 0)
3163 return fd; 4617 return fd;
3164#endif 4618#endif
3165 return inotify_init (); 4619 return inotify_init ();
… …
3240#else 4694#else
3241# define EV_LSTAT(p,b) lstat (p, b) 4695# define EV_LSTAT(p,b) lstat (p, b)
3242#endif 4696#endif
3243 4697
3244void 4698void
3245ev_stat_stat (EV_P_ ev_stat *w) 4699ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3246{ 4700{
3247 if (lstat (w->path, &w->attr) < 0) 4701 if (lstat (w->path, &w->attr) < 0)
3248 w->attr.st_nlink = 0; 4702 w->attr.st_nlink = 0;
3249 else if (!w->attr.st_nlink) 4703 else if (!w->attr.st_nlink)
3250 w->attr.st_nlink = 1; 4704 w->attr.st_nlink = 1;
3251} 4705}
3252 4706
3253static void noinline 4707ecb_noinline
4708static void
3254stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4709stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3255{ 4710{
3256 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4711 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3257 4712
3258 ev_statdata prev = w->attr; 4713 ev_statdata prev = w->attr;
… …
3289 ev_feed_event (EV_A_ w, EV_STAT); 4744 ev_feed_event (EV_A_ w, EV_STAT);
3290 } 4745 }
3291} 4746}
3292 4747
3293void 4748void
3294ev_stat_start (EV_P_ ev_stat *w) 4749ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3295{ 4750{
3296 if (expect_false (ev_is_active (w))) 4751 if (ecb_expect_false (ev_is_active (w)))
3297 return; 4752 return;
3298 4753
3299 ev_stat_stat (EV_A_ w); 4754 ev_stat_stat (EV_A_ w);
3300 4755
3301 if (w->interval < MIN_STAT_INTERVAL && w->interval) 4756 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3320 4775
3321 EV_FREQUENT_CHECK; 4776 EV_FREQUENT_CHECK;
3322} 4777}
3323 4778
3324void 4779void
3325ev_stat_stop (EV_P_ ev_stat *w) 4780ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3326{ 4781{
3327 clear_pending (EV_A_ (W)w); 4782 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w))) 4783 if (ecb_expect_false (!ev_is_active (w)))
3329 return; 4784 return;
3330 4785
3331 EV_FREQUENT_CHECK; 4786 EV_FREQUENT_CHECK;
3332 4787
3333#if EV_USE_INOTIFY 4788#if EV_USE_INOTIFY
… …
3346} 4801}
3347#endif 4802#endif
3348 4803
3349#if EV_IDLE_ENABLE 4804#if EV_IDLE_ENABLE
3350void 4805void
3351ev_idle_start (EV_P_ ev_idle *w) 4806ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3352{ 4807{
3353 if (expect_false (ev_is_active (w))) 4808 if (ecb_expect_false (ev_is_active (w)))
3354 return; 4809 return;
3355 4810
3356 pri_adjust (EV_A_ (W)w); 4811 pri_adjust (EV_A_ (W)w);
3357 4812
3358 EV_FREQUENT_CHECK; 4813 EV_FREQUENT_CHECK;
… …
3361 int active = ++idlecnt [ABSPRI (w)]; 4816 int active = ++idlecnt [ABSPRI (w)];
3362 4817
3363 ++idleall; 4818 ++idleall;
3364 ev_start (EV_A_ (W)w, active); 4819 ev_start (EV_A_ (W)w, active);
3365 4820
3366 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4821 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3367 idles [ABSPRI (w)][active - 1] = w; 4822 idles [ABSPRI (w)][active - 1] = w;
3368 } 4823 }
3369 4824
3370 EV_FREQUENT_CHECK; 4825 EV_FREQUENT_CHECK;
3371} 4826}
3372 4827
3373void 4828void
3374ev_idle_stop (EV_P_ ev_idle *w) 4829ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3375{ 4830{
3376 clear_pending (EV_A_ (W)w); 4831 clear_pending (EV_A_ (W)w);
3377 if (expect_false (!ev_is_active (w))) 4832 if (ecb_expect_false (!ev_is_active (w)))
3378 return; 4833 return;
3379 4834
3380 EV_FREQUENT_CHECK; 4835 EV_FREQUENT_CHECK;
3381 4836
3382 { 4837 {
… …
3393} 4848}
3394#endif 4849#endif
3395 4850
3396#if EV_PREPARE_ENABLE 4851#if EV_PREPARE_ENABLE
3397void 4852void
3398ev_prepare_start (EV_P_ ev_prepare *w) 4853ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3399{ 4854{
3400 if (expect_false (ev_is_active (w))) 4855 if (ecb_expect_false (ev_is_active (w)))
3401 return; 4856 return;
3402 4857
3403 EV_FREQUENT_CHECK; 4858 EV_FREQUENT_CHECK;
3404 4859
3405 ev_start (EV_A_ (W)w, ++preparecnt); 4860 ev_start (EV_A_ (W)w, ++preparecnt);
3406 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4861 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3407 prepares [preparecnt - 1] = w; 4862 prepares [preparecnt - 1] = w;
3408 4863
3409 EV_FREQUENT_CHECK; 4864 EV_FREQUENT_CHECK;
3410} 4865}
3411 4866
3412void 4867void
3413ev_prepare_stop (EV_P_ ev_prepare *w) 4868ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3414{ 4869{
3415 clear_pending (EV_A_ (W)w); 4870 clear_pending (EV_A_ (W)w);
3416 if (expect_false (!ev_is_active (w))) 4871 if (ecb_expect_false (!ev_is_active (w)))
3417 return; 4872 return;
3418 4873
3419 EV_FREQUENT_CHECK; 4874 EV_FREQUENT_CHECK;
3420 4875
3421 { 4876 {
… …
3431} 4886}
3432#endif 4887#endif
3433 4888
3434#if EV_CHECK_ENABLE 4889#if EV_CHECK_ENABLE
3435void 4890void
3436ev_check_start (EV_P_ ev_check *w) 4891ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3437{ 4892{
3438 if (expect_false (ev_is_active (w))) 4893 if (ecb_expect_false (ev_is_active (w)))
3439 return; 4894 return;
3440 4895
3441 EV_FREQUENT_CHECK; 4896 EV_FREQUENT_CHECK;
3442 4897
3443 ev_start (EV_A_ (W)w, ++checkcnt); 4898 ev_start (EV_A_ (W)w, ++checkcnt);
3444 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4899 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3445 checks [checkcnt - 1] = w; 4900 checks [checkcnt - 1] = w;
3446 4901
3447 EV_FREQUENT_CHECK; 4902 EV_FREQUENT_CHECK;
3448} 4903}
3449 4904
3450void 4905void
3451ev_check_stop (EV_P_ ev_check *w) 4906ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3452{ 4907{
3453 clear_pending (EV_A_ (W)w); 4908 clear_pending (EV_A_ (W)w);
3454 if (expect_false (!ev_is_active (w))) 4909 if (ecb_expect_false (!ev_is_active (w)))
3455 return; 4910 return;
3456 4911
3457 EV_FREQUENT_CHECK; 4912 EV_FREQUENT_CHECK;
3458 4913
3459 { 4914 {
… …
3468 EV_FREQUENT_CHECK; 4923 EV_FREQUENT_CHECK;
3469} 4924}
3470#endif 4925#endif
3471 4926
3472#if EV_EMBED_ENABLE 4927#if EV_EMBED_ENABLE
3473void noinline 4928ecb_noinline
4929void
3474ev_embed_sweep (EV_P_ ev_embed *w) 4930ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3475{ 4931{
3476 ev_run (w->other, EVRUN_NOWAIT); 4932 ev_run (w->other, EVRUN_NOWAIT);
3477} 4933}
3478 4934
3479static void 4935static void
… …
3527 ev_idle_stop (EV_A_ idle); 4983 ev_idle_stop (EV_A_ idle);
3528} 4984}
3529#endif 4985#endif
3530 4986
3531void 4987void
3532ev_embed_start (EV_P_ ev_embed *w) 4988ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3533{ 4989{
3534 if (expect_false (ev_is_active (w))) 4990 if (ecb_expect_false (ev_is_active (w)))
3535 return; 4991 return;
3536 4992
3537 { 4993 {
3538 EV_P = w->other; 4994 EV_P = w->other;
3539 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4995 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
… …
3558 5014
3559 EV_FREQUENT_CHECK; 5015 EV_FREQUENT_CHECK;
3560} 5016}
3561 5017
3562void 5018void
3563ev_embed_stop (EV_P_ ev_embed *w) 5019ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3564{ 5020{
3565 clear_pending (EV_A_ (W)w); 5021 clear_pending (EV_A_ (W)w);
3566 if (expect_false (!ev_is_active (w))) 5022 if (ecb_expect_false (!ev_is_active (w)))
3567 return; 5023 return;
3568 5024
3569 EV_FREQUENT_CHECK; 5025 EV_FREQUENT_CHECK;
3570 5026
3571 ev_io_stop (EV_A_ &w->io); 5027 ev_io_stop (EV_A_ &w->io);
… …
3578} 5034}
3579#endif 5035#endif
3580 5036
3581#if EV_FORK_ENABLE 5037#if EV_FORK_ENABLE
3582void 5038void
3583ev_fork_start (EV_P_ ev_fork *w) 5039ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3584{ 5040{
3585 if (expect_false (ev_is_active (w))) 5041 if (ecb_expect_false (ev_is_active (w)))
3586 return; 5042 return;
3587 5043
3588 EV_FREQUENT_CHECK; 5044 EV_FREQUENT_CHECK;
3589 5045
3590 ev_start (EV_A_ (W)w, ++forkcnt); 5046 ev_start (EV_A_ (W)w, ++forkcnt);
3591 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5047 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3592 forks [forkcnt - 1] = w; 5048 forks [forkcnt - 1] = w;
3593 5049
3594 EV_FREQUENT_CHECK; 5050 EV_FREQUENT_CHECK;
3595} 5051}
3596 5052
3597void 5053void
3598ev_fork_stop (EV_P_ ev_fork *w) 5054ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3599{ 5055{
3600 clear_pending (EV_A_ (W)w); 5056 clear_pending (EV_A_ (W)w);
3601 if (expect_false (!ev_is_active (w))) 5057 if (ecb_expect_false (!ev_is_active (w)))
3602 return; 5058 return;
3603 5059
3604 EV_FREQUENT_CHECK; 5060 EV_FREQUENT_CHECK;
3605 5061
3606 { 5062 {
… …
3616} 5072}
3617#endif 5073#endif
3618 5074
3619#if EV_CLEANUP_ENABLE 5075#if EV_CLEANUP_ENABLE
3620void 5076void
3621ev_cleanup_start (EV_P_ ev_cleanup *w) 5077ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3622{ 5078{
3623 if (expect_false (ev_is_active (w))) 5079 if (ecb_expect_false (ev_is_active (w)))
3624 return; 5080 return;
3625 5081
3626 EV_FREQUENT_CHECK; 5082 EV_FREQUENT_CHECK;
3627 5083
3628 ev_start (EV_A_ (W)w, ++cleanupcnt); 5084 ev_start (EV_A_ (W)w, ++cleanupcnt);
3629 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); 5085 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3630 cleanups [cleanupcnt - 1] = w; 5086 cleanups [cleanupcnt - 1] = w;
3631 5087
3632 /* cleanup watchers should never keep a refcount on the loop */ 5088 /* cleanup watchers should never keep a refcount on the loop */
3633 ev_unref (EV_A); 5089 ev_unref (EV_A);
3634 EV_FREQUENT_CHECK; 5090 EV_FREQUENT_CHECK;
3635} 5091}
3636 5092
3637void 5093void
3638ev_cleanup_stop (EV_P_ ev_cleanup *w) 5094ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3639{ 5095{
3640 clear_pending (EV_A_ (W)w); 5096 clear_pending (EV_A_ (W)w);
3641 if (expect_false (!ev_is_active (w))) 5097 if (ecb_expect_false (!ev_is_active (w)))
3642 return; 5098 return;
3643 5099
3644 EV_FREQUENT_CHECK; 5100 EV_FREQUENT_CHECK;
3645 ev_ref (EV_A); 5101 ev_ref (EV_A);
3646 5102
… …
3657} 5113}
3658#endif 5114#endif
3659 5115
3660#if EV_ASYNC_ENABLE 5116#if EV_ASYNC_ENABLE
3661void 5117void
3662ev_async_start (EV_P_ ev_async *w) 5118ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3663{ 5119{
3664 if (expect_false (ev_is_active (w))) 5120 if (ecb_expect_false (ev_is_active (w)))
3665 return; 5121 return;
3666 5122
3667 w->sent = 0; 5123 w->sent = 0;
3668 5124
3669 evpipe_init (EV_A); 5125 evpipe_init (EV_A);
3670 5126
3671 EV_FREQUENT_CHECK; 5127 EV_FREQUENT_CHECK;
3672 5128
3673 ev_start (EV_A_ (W)w, ++asynccnt); 5129 ev_start (EV_A_ (W)w, ++asynccnt);
3674 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5130 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3675 asyncs [asynccnt - 1] = w; 5131 asyncs [asynccnt - 1] = w;
3676 5132
3677 EV_FREQUENT_CHECK; 5133 EV_FREQUENT_CHECK;
3678} 5134}
3679 5135
3680void 5136void
3681ev_async_stop (EV_P_ ev_async *w) 5137ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3682{ 5138{
3683 clear_pending (EV_A_ (W)w); 5139 clear_pending (EV_A_ (W)w);
3684 if (expect_false (!ev_is_active (w))) 5140 if (ecb_expect_false (!ev_is_active (w)))
3685 return; 5141 return;
3686 5142
3687 EV_FREQUENT_CHECK; 5143 EV_FREQUENT_CHECK;
3688 5144
3689 { 5145 {
… …
3697 5153
3698 EV_FREQUENT_CHECK; 5154 EV_FREQUENT_CHECK;
3699} 5155}
3700 5156
3701void 5157void
3702ev_async_send (EV_P_ ev_async *w) 5158ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3703{ 5159{
3704 w->sent = 1; 5160 w->sent = 1;
3705 evpipe_write (EV_A_ &async_pending); 5161 evpipe_write (EV_A_ &async_pending);
3706} 5162}
3707#endif 5163#endif
… …
3744 5200
3745 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5201 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3746} 5202}
3747 5203
3748void 5204void
3749ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5205ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3750{ 5206{
3751 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5207 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3752
3753 if (expect_false (!once))
3754 {
3755 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3756 return;
3757 }
3758 5208
3759 once->cb = cb; 5209 once->cb = cb;
3760 once->arg = arg; 5210 once->arg = arg;
3761 5211
3762 ev_init (&once->io, once_cb_io); 5212 ev_init (&once->io, once_cb_io);
… …
3775} 5225}
3776 5226
3777/*****************************************************************************/ 5227/*****************************************************************************/
3778 5228
3779#if EV_WALK_ENABLE 5229#if EV_WALK_ENABLE
5230ecb_cold
3780void 5231void
3781ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5232ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3782{ 5233{
3783 int i, j; 5234 int i, j;
3784 ev_watcher_list *wl, *wn; 5235 ev_watcher_list *wl, *wn;
3785 5236
3786 if (types & (EV_IO | EV_EMBED)) 5237 if (types & (EV_IO | EV_EMBED))
… …
3829 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5280 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830#endif 5281#endif
3831 5282
3832#if EV_IDLE_ENABLE 5283#if EV_IDLE_ENABLE
3833 if (types & EV_IDLE) 5284 if (types & EV_IDLE)
3834 for (j = NUMPRI; i--; ) 5285 for (j = NUMPRI; j--; )
3835 for (i = idlecnt [j]; i--; ) 5286 for (i = idlecnt [j]; i--; )
3836 cb (EV_A_ EV_IDLE, idles [j][i]); 5287 cb (EV_A_ EV_IDLE, idles [j][i]);
3837#endif 5288#endif
3838 5289
3839#if EV_FORK_ENABLE 5290#if EV_FORK_ENABLE
… …
3892 5343
3893#if EV_MULTIPLICITY 5344#if EV_MULTIPLICITY
3894 #include "ev_wrap.h" 5345 #include "ev_wrap.h"
3895#endif 5346#endif
3896 5347
3897EV_CPP(})
3898

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