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Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.505 by root, Wed Jul 10 14:25:35 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif 114# endif
109# else 115# else
110# undef EV_USE_EPOLL 116# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0 117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
112# endif 127# endif
113 128
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE 130# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
… …
156# define EV_USE_EVENTFD 0 171# define EV_USE_EVENTFD 0
157# endif 172# endif
158 173
159#endif 174#endif
160 175
161#include <math.h> 176/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were
179 * ordered to have a vacuum, or they do anything for money.
180 * This might help. Or not.
181 * Note that this must be defined early, as other include files
182 * will rely on this define as well.
183 */
184#define _DARWIN_UNLIMITED_SELECT 1
185
162#include <stdlib.h> 186#include <stdlib.h>
163#include <string.h> 187#include <string.h>
164#include <fcntl.h> 188#include <fcntl.h>
165#include <stddef.h> 189#include <stddef.h>
166 190
… …
178# include EV_H 202# include EV_H
179#else 203#else
180# include "ev.h" 204# include "ev.h"
181#endif 205#endif
182 206
183EV_CPP(extern "C" {) 207#if EV_NO_THREADS
208# undef EV_NO_SMP
209# define EV_NO_SMP 1
210# undef ECB_NO_THREADS
211# define ECB_NO_THREADS 1
212#endif
213#if EV_NO_SMP
214# undef EV_NO_SMP
215# define ECB_NO_SMP 1
216#endif
184 217
185#ifndef _WIN32 218#ifndef _WIN32
186# include <sys/time.h> 219# include <sys/time.h>
187# include <sys/wait.h> 220# include <sys/wait.h>
188# include <unistd.h> 221# include <unistd.h>
189#else 222#else
190# include <io.h> 223# include <io.h>
191# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
192# include <windows.h> 226# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
195# endif 229# endif
196# undef EV_AVOID_STDIO 230# undef EV_AVOID_STDIO
197#endif 231#endif
198 232
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 233/* this block tries to deduce configuration from header-defined symbols and defaults */
208 234
209/* try to deduce the maximum number of signals on this platform */ 235/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 236#if defined EV_NSIG
211/* use what's provided */ 237/* use what's provided */
212#elif defined (NSIG) 238#elif defined NSIG
213# define EV_NSIG (NSIG) 239# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 240#elif defined _NSIG
215# define EV_NSIG (_NSIG) 241# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 242#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 243# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 244#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 245# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 246#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 247# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 248#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 249# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 250#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 251# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 252#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 253# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 254#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 255# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 256#else
231# error "unable to find value for NSIG, please report" 257# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 258#endif
233/* but consider reporting it, too! :) */ 259
234# define EV_NSIG 65 260#ifndef EV_USE_FLOOR
261# define EV_USE_FLOOR 0
235#endif 262#endif
236 263
237#ifndef EV_USE_CLOCK_SYSCALL 264#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 265# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 266# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 267# else
241# define EV_USE_CLOCK_SYSCALL 0 268# define EV_USE_CLOCK_SYSCALL 0
242# endif 269# endif
243#endif 270#endif
244 271
272#if !(_POSIX_TIMERS > 0)
273# ifndef EV_USE_MONOTONIC
274# define EV_USE_MONOTONIC 0
275# endif
276# ifndef EV_USE_REALTIME
277# define EV_USE_REALTIME 0
278# endif
279#endif
280
245#ifndef EV_USE_MONOTONIC 281#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 282# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 283# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 284# else
249# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
250# endif 286# endif
251#endif 287#endif
… …
288 324
289#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
290# define EV_USE_PORT 0 326# define EV_USE_PORT 0
291#endif 327#endif
292 328
329#ifndef EV_USE_LINUXAIO
330# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
331# define EV_USE_LINUXAIO 1
332# else
333# define EV_USE_LINUXAIO 0
334# endif
335#endif
336
337#ifndef EV_USE_IOURING
338# if __linux
339# define EV_USE_IOURING 0
340# else
341# define EV_USE_IOURING 0
342# endif
343#endif
344
293#ifndef EV_USE_INOTIFY 345#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 346# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS 347# define EV_USE_INOTIFY EV_FEATURE_OS
296# else 348# else
297# define EV_USE_INOTIFY 0 349# define EV_USE_INOTIFY 0
… …
338 390
339#ifndef EV_HEAP_CACHE_AT 391#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 392# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 393#endif
342 394
395#ifdef __ANDROID__
396/* supposedly, android doesn't typedef fd_mask */
397# undef EV_USE_SELECT
398# define EV_USE_SELECT 0
399/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
400# undef EV_USE_CLOCK_SYSCALL
401# define EV_USE_CLOCK_SYSCALL 0
402#endif
403
404/* aix's poll.h seems to cause lots of trouble */
405#ifdef _AIX
406/* AIX has a completely broken poll.h header */
407# undef EV_USE_POLL
408# define EV_USE_POLL 0
409#endif
410
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 411/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 412/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 413#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 414# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 415# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 416# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 417# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 418# define EV_USE_MONOTONIC 1
419# define EV_NEED_SYSCALL 1
351# else 420# else
352# undef EV_USE_CLOCK_SYSCALL 421# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0 422# define EV_USE_CLOCK_SYSCALL 0
354# endif 423# endif
355#endif 424#endif
356 425
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 426/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 427
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 428#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 429# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 430# define EV_USE_MONOTONIC 0
368#endif 431#endif
369 432
… …
376# undef EV_USE_INOTIFY 439# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 440# define EV_USE_INOTIFY 0
378#endif 441#endif
379 442
380#if !EV_USE_NANOSLEEP 443#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 444/* hp-ux has it in sys/time.h, which we unconditionally include above */
445# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 446# include <sys/select.h>
383# endif 447# endif
384#endif 448#endif
385 449
450#if EV_USE_LINUXAIO
451# include <sys/syscall.h>
452# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
453# define EV_NEED_SYSCALL 1
454# else
455# undef EV_USE_LINUXAIO
456# define EV_USE_LINUXAIO 0
457# endif
458#endif
459
460#if EV_USE_IOURING
461# include <sys/syscall.h>
462# if !SYS_io_uring_setup && __linux && !__alpha
463# define SYS_io_uring_setup 425
464# define SYS_io_uring_enter 426
465# define SYS_io_uring_wregister 427
466# endif
467# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
468# define EV_NEED_SYSCALL 1
469# else
470# undef EV_USE_IOURING
471# define EV_USE_IOURING 0
472# endif
473#endif
474
386#if EV_USE_INOTIFY 475#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 476# include <sys/statfs.h>
389# include <sys/inotify.h> 477# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 478/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 479# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 480# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 481# define EV_USE_INOTIFY 0
394# endif 482# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 483#endif
400 484
401#if EV_USE_EVENTFD 485#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 486/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 487# include <stdint.h>
… …
434 uint32_t ssi_signo; 518 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)]; 519 char pad[128 - sizeof (uint32_t)];
436}; 520};
437#endif 521#endif
438 522
439/**/ 523/*****************************************************************************/
440 524
441#if EV_VERIFY >= 3 525#if EV_VERIFY >= 3
442# define EV_FREQUENT_CHECK ev_verify (EV_A) 526# define EV_FREQUENT_CHECK ev_verify (EV_A)
443#else 527#else
444# define EV_FREQUENT_CHECK do { } while (0) 528# define EV_FREQUENT_CHECK do { } while (0)
445#endif 529#endif
446 530
447/* 531/*
448 * This is used to avoid floating point rounding problems. 532 * 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. 533 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 534 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 535#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
536/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 537
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 538#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) */ 539#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
540
541/* find a portable timestamp that is "always" in the future but fits into time_t.
542 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
543 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
544#define EV_TSTAMP_HUGE \
545 (sizeof (time_t) >= 8 ? 10000000000000. \
546 : 0 < (time_t)4294967295 ? 4294967295. \
547 : 2147483647.) \
459 548
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 549#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) 550#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
551#define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e6)
552#define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e9)
462 553
554/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
555/* ECB.H BEGIN */
556/*
557 * libecb - http://software.schmorp.de/pkg/libecb
558 *
559 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
560 * Copyright (©) 2011 Emanuele Giaquinta
561 * All rights reserved.
562 *
563 * Redistribution and use in source and binary forms, with or without modifica-
564 * tion, are permitted provided that the following conditions are met:
565 *
566 * 1. Redistributions of source code must retain the above copyright notice,
567 * this list of conditions and the following disclaimer.
568 *
569 * 2. Redistributions in binary form must reproduce the above copyright
570 * notice, this list of conditions and the following disclaimer in the
571 * documentation and/or other materials provided with the distribution.
572 *
573 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
574 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
575 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
576 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
577 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
578 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
579 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
580 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
581 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
582 * OF THE POSSIBILITY OF SUCH DAMAGE.
583 *
584 * Alternatively, the contents of this file may be used under the terms of
585 * the GNU General Public License ("GPL") version 2 or any later version,
586 * in which case the provisions of the GPL are applicable instead of
587 * the above. If you wish to allow the use of your version of this file
588 * only under the terms of the GPL and not to allow others to use your
589 * version of this file under the BSD license, indicate your decision
590 * by deleting the provisions above and replace them with the notice
591 * and other provisions required by the GPL. If you do not delete the
592 * provisions above, a recipient may use your version of this file under
593 * either the BSD or the GPL.
594 */
595
596#ifndef ECB_H
597#define ECB_H
598
599/* 16 bits major, 16 bits minor */
600#define ECB_VERSION 0x00010006
601
602#ifdef _WIN32
603 typedef signed char int8_t;
604 typedef unsigned char uint8_t;
605 typedef signed short int16_t;
606 typedef unsigned short uint16_t;
607 typedef signed int int32_t;
608 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 609 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 610 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 611 typedef unsigned long long uint64_t;
612 #else /* _MSC_VER || __BORLANDC__ */
613 typedef signed __int64 int64_t;
614 typedef unsigned __int64 uint64_t;
615 #endif
616 #ifdef _WIN64
617 #define ECB_PTRSIZE 8
618 typedef uint64_t uintptr_t;
619 typedef int64_t intptr_t;
620 #else
621 #define ECB_PTRSIZE 4
622 typedef uint32_t uintptr_t;
623 typedef int32_t intptr_t;
624 #endif
466#else 625#else
467# define expect(expr,value) (expr) 626 #include <inttypes.h>
468# define noinline 627 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 628 #define ECB_PTRSIZE 8
470# define inline 629 #else
630 #define ECB_PTRSIZE 4
631 #endif
471# endif 632#endif
633
634#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
635#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
636
637/* work around x32 idiocy by defining proper macros */
638#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
639 #if _ILP32
640 #define ECB_AMD64_X32 1
641 #else
642 #define ECB_AMD64 1
472#endif 643 #endif
644#endif
473 645
646/* many compilers define _GNUC_ to some versions but then only implement
647 * what their idiot authors think are the "more important" extensions,
648 * causing enormous grief in return for some better fake benchmark numbers.
649 * or so.
650 * we try to detect these and simply assume they are not gcc - if they have
651 * an issue with that they should have done it right in the first place.
652 */
653#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
654 #define ECB_GCC_VERSION(major,minor) 0
655#else
656 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
657#endif
658
659#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
660
661#if __clang__ && defined __has_builtin
662 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
663#else
664 #define ECB_CLANG_BUILTIN(x) 0
665#endif
666
667#if __clang__ && defined __has_extension
668 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
669#else
670 #define ECB_CLANG_EXTENSION(x) 0
671#endif
672
673#define ECB_CPP (__cplusplus+0)
674#define ECB_CPP11 (__cplusplus >= 201103L)
675#define ECB_CPP14 (__cplusplus >= 201402L)
676#define ECB_CPP17 (__cplusplus >= 201703L)
677
678#if ECB_CPP
679 #define ECB_C 0
680 #define ECB_STDC_VERSION 0
681#else
682 #define ECB_C 1
683 #define ECB_STDC_VERSION __STDC_VERSION__
684#endif
685
686#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
687#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
688#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
689
690#if ECB_CPP
691 #define ECB_EXTERN_C extern "C"
692 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
693 #define ECB_EXTERN_C_END }
694#else
695 #define ECB_EXTERN_C extern
696 #define ECB_EXTERN_C_BEG
697 #define ECB_EXTERN_C_END
698#endif
699
700/*****************************************************************************/
701
702/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
703/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
704
705#if ECB_NO_THREADS
706 #define ECB_NO_SMP 1
707#endif
708
709#if ECB_NO_SMP
710 #define ECB_MEMORY_FENCE do { } while (0)
711#endif
712
713/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
714#if __xlC__ && ECB_CPP
715 #include <builtins.h>
716#endif
717
718#if 1400 <= _MSC_VER
719 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
720#endif
721
722#ifndef ECB_MEMORY_FENCE
723 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
724 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
725 #if __i386 || __i386__
726 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
727 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
728 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
729 #elif ECB_GCC_AMD64
730 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
731 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
732 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
733 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
734 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
735 #elif defined __ARM_ARCH_2__ \
736 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
737 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
738 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
739 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
740 || defined __ARM_ARCH_5TEJ__
741 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
742 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
743 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
744 || defined __ARM_ARCH_6T2__
745 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
746 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
747 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
748 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
749 #elif __aarch64__
750 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
751 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
752 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
753 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
754 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
755 #elif defined __s390__ || defined __s390x__
756 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
757 #elif defined __mips__
758 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
759 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
760 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
761 #elif defined __alpha__
762 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
763 #elif defined __hppa__
764 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
765 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
766 #elif defined __ia64__
767 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
768 #elif defined __m68k__
769 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
770 #elif defined __m88k__
771 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
772 #elif defined __sh__
773 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
774 #endif
775 #endif
776#endif
777
778#ifndef ECB_MEMORY_FENCE
779 #if ECB_GCC_VERSION(4,7)
780 /* see comment below (stdatomic.h) about the C11 memory model. */
781 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
782 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
783 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
784 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
785
786 #elif ECB_CLANG_EXTENSION(c_atomic)
787 /* see comment below (stdatomic.h) about the C11 memory model. */
788 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
789 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
790 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
791 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
792
793 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
794 #define ECB_MEMORY_FENCE __sync_synchronize ()
795 #elif _MSC_VER >= 1500 /* VC++ 2008 */
796 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
797 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
798 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
799 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
800 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
801 #elif _MSC_VER >= 1400 /* VC++ 2005 */
802 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
803 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
804 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
805 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
806 #elif defined _WIN32
807 #include <WinNT.h>
808 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
809 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
810 #include <mbarrier.h>
811 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
812 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
813 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
814 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
815 #elif __xlC__
816 #define ECB_MEMORY_FENCE __sync ()
817 #endif
818#endif
819
820#ifndef ECB_MEMORY_FENCE
821 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
822 /* we assume that these memory fences work on all variables/all memory accesses, */
823 /* not just C11 atomics and atomic accesses */
824 #include <stdatomic.h>
825 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
826 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
827 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
828 #endif
829#endif
830
831#ifndef ECB_MEMORY_FENCE
832 #if !ECB_AVOID_PTHREADS
833 /*
834 * if you get undefined symbol references to pthread_mutex_lock,
835 * or failure to find pthread.h, then you should implement
836 * the ECB_MEMORY_FENCE operations for your cpu/compiler
837 * OR provide pthread.h and link against the posix thread library
838 * of your system.
839 */
840 #include <pthread.h>
841 #define ECB_NEEDS_PTHREADS 1
842 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
843
844 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
845 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
846 #endif
847#endif
848
849#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
850 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
851#endif
852
853#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
854 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
855#endif
856
857#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
858 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
859#endif
860
861/*****************************************************************************/
862
863#if ECB_CPP
864 #define ecb_inline static inline
865#elif ECB_GCC_VERSION(2,5)
866 #define ecb_inline static __inline__
867#elif ECB_C99
868 #define ecb_inline static inline
869#else
870 #define ecb_inline static
871#endif
872
873#if ECB_GCC_VERSION(3,3)
874 #define ecb_restrict __restrict__
875#elif ECB_C99
876 #define ecb_restrict restrict
877#else
878 #define ecb_restrict
879#endif
880
881typedef int ecb_bool;
882
883#define ECB_CONCAT_(a, b) a ## b
884#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
885#define ECB_STRINGIFY_(a) # a
886#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
887#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
888
889#define ecb_function_ ecb_inline
890
891#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
892 #define ecb_attribute(attrlist) __attribute__ (attrlist)
893#else
894 #define ecb_attribute(attrlist)
895#endif
896
897#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
898 #define ecb_is_constant(expr) __builtin_constant_p (expr)
899#else
900 /* possible C11 impl for integral types
901 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
902 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
903
904 #define ecb_is_constant(expr) 0
905#endif
906
907#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
908 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
909#else
910 #define ecb_expect(expr,value) (expr)
911#endif
912
913#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
914 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
915#else
916 #define ecb_prefetch(addr,rw,locality)
917#endif
918
919/* no emulation for ecb_decltype */
920#if ECB_CPP11
921 // older implementations might have problems with decltype(x)::type, work around it
922 template<class T> struct ecb_decltype_t { typedef T type; };
923 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
924#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
925 #define ecb_decltype(x) __typeof__ (x)
926#endif
927
928#if _MSC_VER >= 1300
929 #define ecb_deprecated __declspec (deprecated)
930#else
931 #define ecb_deprecated ecb_attribute ((__deprecated__))
932#endif
933
934#if _MSC_VER >= 1500
935 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
936#elif ECB_GCC_VERSION(4,5)
937 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
938#else
939 #define ecb_deprecated_message(msg) ecb_deprecated
940#endif
941
942#if _MSC_VER >= 1400
943 #define ecb_noinline __declspec (noinline)
944#else
945 #define ecb_noinline ecb_attribute ((__noinline__))
946#endif
947
948#define ecb_unused ecb_attribute ((__unused__))
949#define ecb_const ecb_attribute ((__const__))
950#define ecb_pure ecb_attribute ((__pure__))
951
952#if ECB_C11 || __IBMC_NORETURN
953 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
954 #define ecb_noreturn _Noreturn
955#elif ECB_CPP11
956 #define ecb_noreturn [[noreturn]]
957#elif _MSC_VER >= 1200
958 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
959 #define ecb_noreturn __declspec (noreturn)
960#else
961 #define ecb_noreturn ecb_attribute ((__noreturn__))
962#endif
963
964#if ECB_GCC_VERSION(4,3)
965 #define ecb_artificial ecb_attribute ((__artificial__))
966 #define ecb_hot ecb_attribute ((__hot__))
967 #define ecb_cold ecb_attribute ((__cold__))
968#else
969 #define ecb_artificial
970 #define ecb_hot
971 #define ecb_cold
972#endif
973
974/* put around conditional expressions if you are very sure that the */
975/* expression is mostly true or mostly false. note that these return */
976/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 977#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 978#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
979/* for compatibility to the rest of the world */
980#define ecb_likely(expr) ecb_expect_true (expr)
981#define ecb_unlikely(expr) ecb_expect_false (expr)
982
983/* count trailing zero bits and count # of one bits */
984#if ECB_GCC_VERSION(3,4) \
985 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
986 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
987 && ECB_CLANG_BUILTIN(__builtin_popcount))
988 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
989 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
990 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
991 #define ecb_ctz32(x) __builtin_ctz (x)
992 #define ecb_ctz64(x) __builtin_ctzll (x)
993 #define ecb_popcount32(x) __builtin_popcount (x)
994 /* no popcountll */
995#else
996 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
997 ecb_function_ ecb_const int
998 ecb_ctz32 (uint32_t x)
999 {
1000#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1001 unsigned long r;
1002 _BitScanForward (&r, x);
1003 return (int)r;
1004#else
1005 int r = 0;
1006
1007 x &= ~x + 1; /* this isolates the lowest bit */
1008
1009#if ECB_branchless_on_i386
1010 r += !!(x & 0xaaaaaaaa) << 0;
1011 r += !!(x & 0xcccccccc) << 1;
1012 r += !!(x & 0xf0f0f0f0) << 2;
1013 r += !!(x & 0xff00ff00) << 3;
1014 r += !!(x & 0xffff0000) << 4;
1015#else
1016 if (x & 0xaaaaaaaa) r += 1;
1017 if (x & 0xcccccccc) r += 2;
1018 if (x & 0xf0f0f0f0) r += 4;
1019 if (x & 0xff00ff00) r += 8;
1020 if (x & 0xffff0000) r += 16;
1021#endif
1022
1023 return r;
1024#endif
1025 }
1026
1027 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1028 ecb_function_ ecb_const int
1029 ecb_ctz64 (uint64_t x)
1030 {
1031#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1032 unsigned long r;
1033 _BitScanForward64 (&r, x);
1034 return (int)r;
1035#else
1036 int shift = x & 0xffffffff ? 0 : 32;
1037 return ecb_ctz32 (x >> shift) + shift;
1038#endif
1039 }
1040
1041 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1042 ecb_function_ ecb_const int
1043 ecb_popcount32 (uint32_t x)
1044 {
1045 x -= (x >> 1) & 0x55555555;
1046 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1047 x = ((x >> 4) + x) & 0x0f0f0f0f;
1048 x *= 0x01010101;
1049
1050 return x >> 24;
1051 }
1052
1053 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1054 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1055 {
1056#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1057 unsigned long r;
1058 _BitScanReverse (&r, x);
1059 return (int)r;
1060#else
1061 int r = 0;
1062
1063 if (x >> 16) { x >>= 16; r += 16; }
1064 if (x >> 8) { x >>= 8; r += 8; }
1065 if (x >> 4) { x >>= 4; r += 4; }
1066 if (x >> 2) { x >>= 2; r += 2; }
1067 if (x >> 1) { r += 1; }
1068
1069 return r;
1070#endif
1071 }
1072
1073 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1074 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1075 {
1076#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1077 unsigned long r;
1078 _BitScanReverse64 (&r, x);
1079 return (int)r;
1080#else
1081 int r = 0;
1082
1083 if (x >> 32) { x >>= 32; r += 32; }
1084
1085 return r + ecb_ld32 (x);
1086#endif
1087 }
1088#endif
1089
1090ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1091ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1092ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1093ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1094
1095ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1096ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1097{
1098 return ( (x * 0x0802U & 0x22110U)
1099 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1100}
1101
1102ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1103ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1104{
1105 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1106 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1107 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1108 x = ( x >> 8 ) | ( x << 8);
1109
1110 return x;
1111}
1112
1113ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1114ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1115{
1116 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1117 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1118 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1119 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1120 x = ( x >> 16 ) | ( x << 16);
1121
1122 return x;
1123}
1124
1125/* popcount64 is only available on 64 bit cpus as gcc builtin */
1126/* so for this version we are lazy */
1127ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1128ecb_function_ ecb_const int
1129ecb_popcount64 (uint64_t x)
1130{
1131 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1132}
1133
1134ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1135ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1136ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1137ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1138ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1139ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1140ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1141ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1142
1143ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1144ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1145ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1146ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1147ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1148ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1149ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1150ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1151
1152#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1153 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1154 #define ecb_bswap16(x) __builtin_bswap16 (x)
1155 #else
1156 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1157 #endif
1158 #define ecb_bswap32(x) __builtin_bswap32 (x)
1159 #define ecb_bswap64(x) __builtin_bswap64 (x)
1160#elif _MSC_VER
1161 #include <stdlib.h>
1162 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1163 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1164 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1165#else
1166 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1167 ecb_function_ ecb_const uint16_t
1168 ecb_bswap16 (uint16_t x)
1169 {
1170 return ecb_rotl16 (x, 8);
1171 }
1172
1173 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1174 ecb_function_ ecb_const uint32_t
1175 ecb_bswap32 (uint32_t x)
1176 {
1177 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1178 }
1179
1180 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1181 ecb_function_ ecb_const uint64_t
1182 ecb_bswap64 (uint64_t x)
1183 {
1184 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1185 }
1186#endif
1187
1188#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1189 #define ecb_unreachable() __builtin_unreachable ()
1190#else
1191 /* this seems to work fine, but gcc always emits a warning for it :/ */
1192 ecb_inline ecb_noreturn void ecb_unreachable (void);
1193 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1194#endif
1195
1196/* try to tell the compiler that some condition is definitely true */
1197#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1198
1199ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1200ecb_inline ecb_const uint32_t
1201ecb_byteorder_helper (void)
1202{
1203 /* the union code still generates code under pressure in gcc, */
1204 /* but less than using pointers, and always seems to */
1205 /* successfully return a constant. */
1206 /* the reason why we have this horrible preprocessor mess */
1207 /* is to avoid it in all cases, at least on common architectures */
1208 /* or when using a recent enough gcc version (>= 4.6) */
1209#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1210 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1211 #define ECB_LITTLE_ENDIAN 1
1212 return 0x44332211;
1213#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1214 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1215 #define ECB_BIG_ENDIAN 1
1216 return 0x11223344;
1217#else
1218 union
1219 {
1220 uint8_t c[4];
1221 uint32_t u;
1222 } u = { 0x11, 0x22, 0x33, 0x44 };
1223 return u.u;
1224#endif
1225}
1226
1227ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1228ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1229ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1230ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1231
1232#if ECB_GCC_VERSION(3,0) || ECB_C99
1233 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1234#else
1235 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1236#endif
1237
1238#if ECB_CPP
1239 template<typename T>
1240 static inline T ecb_div_rd (T val, T div)
1241 {
1242 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1243 }
1244 template<typename T>
1245 static inline T ecb_div_ru (T val, T div)
1246 {
1247 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1248 }
1249#else
1250 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1251 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1252#endif
1253
1254#if ecb_cplusplus_does_not_suck
1255 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1256 template<typename T, int N>
1257 static inline int ecb_array_length (const T (&arr)[N])
1258 {
1259 return N;
1260 }
1261#else
1262 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1263#endif
1264
1265ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1266ecb_function_ ecb_const uint32_t
1267ecb_binary16_to_binary32 (uint32_t x)
1268{
1269 unsigned int s = (x & 0x8000) << (31 - 15);
1270 int e = (x >> 10) & 0x001f;
1271 unsigned int m = x & 0x03ff;
1272
1273 if (ecb_expect_false (e == 31))
1274 /* infinity or NaN */
1275 e = 255 - (127 - 15);
1276 else if (ecb_expect_false (!e))
1277 {
1278 if (ecb_expect_true (!m))
1279 /* zero, handled by code below by forcing e to 0 */
1280 e = 0 - (127 - 15);
1281 else
1282 {
1283 /* subnormal, renormalise */
1284 unsigned int s = 10 - ecb_ld32 (m);
1285
1286 m = (m << s) & 0x3ff; /* mask implicit bit */
1287 e -= s - 1;
1288 }
1289 }
1290
1291 /* e and m now are normalised, or zero, (or inf or nan) */
1292 e += 127 - 15;
1293
1294 return s | (e << 23) | (m << (23 - 10));
1295}
1296
1297ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1298ecb_function_ ecb_const uint16_t
1299ecb_binary32_to_binary16 (uint32_t x)
1300{
1301 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1302 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1303 unsigned int m = x & 0x007fffff;
1304
1305 x &= 0x7fffffff;
1306
1307 /* if it's within range of binary16 normals, use fast path */
1308 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1309 {
1310 /* mantissa round-to-even */
1311 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1312
1313 /* handle overflow */
1314 if (ecb_expect_false (m >= 0x00800000))
1315 {
1316 m >>= 1;
1317 e += 1;
1318 }
1319
1320 return s | (e << 10) | (m >> (23 - 10));
1321 }
1322
1323 /* handle large numbers and infinity */
1324 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1325 return s | 0x7c00;
1326
1327 /* handle zero, subnormals and small numbers */
1328 if (ecb_expect_true (x < 0x38800000))
1329 {
1330 /* zero */
1331 if (ecb_expect_true (!x))
1332 return s;
1333
1334 /* handle subnormals */
1335
1336 /* too small, will be zero */
1337 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1338 return s;
1339
1340 m |= 0x00800000; /* make implicit bit explicit */
1341
1342 /* very tricky - we need to round to the nearest e (+10) bit value */
1343 {
1344 unsigned int bits = 14 - e;
1345 unsigned int half = (1 << (bits - 1)) - 1;
1346 unsigned int even = (m >> bits) & 1;
1347
1348 /* if this overflows, we will end up with a normalised number */
1349 m = (m + half + even) >> bits;
1350 }
1351
1352 return s | m;
1353 }
1354
1355 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1356 m >>= 13;
1357
1358 return s | 0x7c00 | m | !m;
1359}
1360
1361/*******************************************************************************/
1362/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1363
1364/* basically, everything uses "ieee pure-endian" floating point numbers */
1365/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1366#if 0 \
1367 || __i386 || __i386__ \
1368 || ECB_GCC_AMD64 \
1369 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1370 || defined __s390__ || defined __s390x__ \
1371 || defined __mips__ \
1372 || defined __alpha__ \
1373 || defined __hppa__ \
1374 || defined __ia64__ \
1375 || defined __m68k__ \
1376 || defined __m88k__ \
1377 || defined __sh__ \
1378 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1379 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1380 || defined __aarch64__
1381 #define ECB_STDFP 1
1382 #include <string.h> /* for memcpy */
1383#else
1384 #define ECB_STDFP 0
1385#endif
1386
1387#ifndef ECB_NO_LIBM
1388
1389 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1390
1391 /* only the oldest of old doesn't have this one. solaris. */
1392 #ifdef INFINITY
1393 #define ECB_INFINITY INFINITY
1394 #else
1395 #define ECB_INFINITY HUGE_VAL
1396 #endif
1397
1398 #ifdef NAN
1399 #define ECB_NAN NAN
1400 #else
1401 #define ECB_NAN ECB_INFINITY
1402 #endif
1403
1404 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1405 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1406 #define ecb_frexpf(x,e) frexpf ((x), (e))
1407 #else
1408 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1409 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1410 #endif
1411
1412 /* convert a float to ieee single/binary32 */
1413 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1414 ecb_function_ ecb_const uint32_t
1415 ecb_float_to_binary32 (float x)
1416 {
1417 uint32_t r;
1418
1419 #if ECB_STDFP
1420 memcpy (&r, &x, 4);
1421 #else
1422 /* slow emulation, works for anything but -0 */
1423 uint32_t m;
1424 int e;
1425
1426 if (x == 0e0f ) return 0x00000000U;
1427 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1428 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1429 if (x != x ) return 0x7fbfffffU;
1430
1431 m = ecb_frexpf (x, &e) * 0x1000000U;
1432
1433 r = m & 0x80000000U;
1434
1435 if (r)
1436 m = -m;
1437
1438 if (e <= -126)
1439 {
1440 m &= 0xffffffU;
1441 m >>= (-125 - e);
1442 e = -126;
1443 }
1444
1445 r |= (e + 126) << 23;
1446 r |= m & 0x7fffffU;
1447 #endif
1448
1449 return r;
1450 }
1451
1452 /* converts an ieee single/binary32 to a float */
1453 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1454 ecb_function_ ecb_const float
1455 ecb_binary32_to_float (uint32_t x)
1456 {
1457 float r;
1458
1459 #if ECB_STDFP
1460 memcpy (&r, &x, 4);
1461 #else
1462 /* emulation, only works for normals and subnormals and +0 */
1463 int neg = x >> 31;
1464 int e = (x >> 23) & 0xffU;
1465
1466 x &= 0x7fffffU;
1467
1468 if (e)
1469 x |= 0x800000U;
1470 else
1471 e = 1;
1472
1473 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1474 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1475
1476 r = neg ? -r : r;
1477 #endif
1478
1479 return r;
1480 }
1481
1482 /* convert a double to ieee double/binary64 */
1483 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1484 ecb_function_ ecb_const uint64_t
1485 ecb_double_to_binary64 (double x)
1486 {
1487 uint64_t r;
1488
1489 #if ECB_STDFP
1490 memcpy (&r, &x, 8);
1491 #else
1492 /* slow emulation, works for anything but -0 */
1493 uint64_t m;
1494 int e;
1495
1496 if (x == 0e0 ) return 0x0000000000000000U;
1497 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1498 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1499 if (x != x ) return 0X7ff7ffffffffffffU;
1500
1501 m = frexp (x, &e) * 0x20000000000000U;
1502
1503 r = m & 0x8000000000000000;;
1504
1505 if (r)
1506 m = -m;
1507
1508 if (e <= -1022)
1509 {
1510 m &= 0x1fffffffffffffU;
1511 m >>= (-1021 - e);
1512 e = -1022;
1513 }
1514
1515 r |= ((uint64_t)(e + 1022)) << 52;
1516 r |= m & 0xfffffffffffffU;
1517 #endif
1518
1519 return r;
1520 }
1521
1522 /* converts an ieee double/binary64 to a double */
1523 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1524 ecb_function_ ecb_const double
1525 ecb_binary64_to_double (uint64_t x)
1526 {
1527 double r;
1528
1529 #if ECB_STDFP
1530 memcpy (&r, &x, 8);
1531 #else
1532 /* emulation, only works for normals and subnormals and +0 */
1533 int neg = x >> 63;
1534 int e = (x >> 52) & 0x7ffU;
1535
1536 x &= 0xfffffffffffffU;
1537
1538 if (e)
1539 x |= 0x10000000000000U;
1540 else
1541 e = 1;
1542
1543 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1544 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1545
1546 r = neg ? -r : r;
1547 #endif
1548
1549 return r;
1550 }
1551
1552 /* convert a float to ieee half/binary16 */
1553 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1554 ecb_function_ ecb_const uint16_t
1555 ecb_float_to_binary16 (float x)
1556 {
1557 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1558 }
1559
1560 /* convert an ieee half/binary16 to float */
1561 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1562 ecb_function_ ecb_const float
1563 ecb_binary16_to_float (uint16_t x)
1564 {
1565 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1566 }
1567
1568#endif
1569
1570#endif
1571
1572/* ECB.H END */
1573
1574#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1575/* if your architecture doesn't need memory fences, e.g. because it is
1576 * single-cpu/core, or if you use libev in a project that doesn't use libev
1577 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1578 * libev, in which cases the memory fences become nops.
1579 * alternatively, you can remove this #error and link against libpthread,
1580 * which will then provide the memory fences.
1581 */
1582# error "memory fences not defined for your architecture, please report"
1583#endif
1584
1585#ifndef ECB_MEMORY_FENCE
1586# define ECB_MEMORY_FENCE do { } while (0)
1587# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1588# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1589#endif
1590
476#define inline_size static inline 1591#define inline_size ecb_inline
477 1592
478#if EV_FEATURE_CODE 1593#if EV_FEATURE_CODE
479# define inline_speed static inline 1594# define inline_speed ecb_inline
480#else 1595#else
481# define inline_speed static noinline 1596# define inline_speed ecb_noinline static
482#endif 1597#endif
1598
1599/*****************************************************************************/
1600/* raw syscall wrappers */
1601
1602#if EV_NEED_SYSCALL
1603
1604#include <sys/syscall.h>
1605
1606/*
1607 * define some syscall wrappers for common architectures
1608 * this is mostly for nice looks during debugging, not performance.
1609 * our syscalls return < 0, not == -1, on error. which is good
1610 * enough for linux aio.
1611 * TODO: arm is also common nowadays, maybe even mips and x86
1612 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1613 */
1614#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__
1615 /* the costly errno access probably kills this for size optimisation */
1616
1617 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1618 ({ \
1619 long res; \
1620 register unsigned long r6 __asm__ ("r9" ); \
1621 register unsigned long r5 __asm__ ("r8" ); \
1622 register unsigned long r4 __asm__ ("r10"); \
1623 register unsigned long r3 __asm__ ("rdx"); \
1624 register unsigned long r2 __asm__ ("rsi"); \
1625 register unsigned long r1 __asm__ ("rdi"); \
1626 if (narg >= 6) r6 = (unsigned long)(arg6); \
1627 if (narg >= 5) r5 = (unsigned long)(arg5); \
1628 if (narg >= 4) r4 = (unsigned long)(arg4); \
1629 if (narg >= 3) r3 = (unsigned long)(arg3); \
1630 if (narg >= 2) r2 = (unsigned long)(arg2); \
1631 if (narg >= 1) r1 = (unsigned long)(arg1); \
1632 __asm__ __volatile__ ( \
1633 "syscall\n\t" \
1634 : "=a" (res) \
1635 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1636 : "cc", "r11", "cx", "memory"); \
1637 errno = -res; \
1638 res; \
1639 })
1640
1641#endif
1642
1643#ifdef ev_syscall
1644 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1645 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1646 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1647 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1648 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1649 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1650 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1651#else
1652 #define ev_syscall0(nr) syscall (nr)
1653 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1654 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1655 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1656 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1657 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1658 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1659#endif
1660
1661#endif
1662
1663/*****************************************************************************/
483 1664
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1665#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1666
486#if EV_MINPRI == EV_MAXPRI 1667#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0) 1668# define ABSPRI(w) (((W)w), 0)
488#else 1669#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1670# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif 1671#endif
491 1672
492#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1673#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494 1674
495typedef ev_watcher *W; 1675typedef ev_watcher *W;
496typedef ev_watcher_list *WL; 1676typedef ev_watcher_list *WL;
497typedef ev_watcher_time *WT; 1677typedef ev_watcher_time *WT;
498 1678
… …
523# include "ev_win32.c" 1703# include "ev_win32.c"
524#endif 1704#endif
525 1705
526/*****************************************************************************/ 1706/*****************************************************************************/
527 1707
1708#if EV_USE_LINUXAIO
1709# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1710#endif
1711
1712/* define a suitable floor function (only used by periodics atm) */
1713
1714#if EV_USE_FLOOR
1715# include <math.h>
1716# define ev_floor(v) floor (v)
1717#else
1718
1719#include <float.h>
1720
1721/* a floor() replacement function, should be independent of ev_tstamp type */
1722ecb_noinline
1723static ev_tstamp
1724ev_floor (ev_tstamp v)
1725{
1726 /* the choice of shift factor is not terribly important */
1727#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1728 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1729#else
1730 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1731#endif
1732
1733 /* special treatment for negative arguments */
1734 if (ecb_expect_false (v < 0.))
1735 {
1736 ev_tstamp f = -ev_floor (-v);
1737
1738 return f - (f == v ? 0 : 1);
1739 }
1740
1741 /* argument too large for an unsigned long? then reduce it */
1742 if (ecb_expect_false (v >= shift))
1743 {
1744 ev_tstamp f;
1745
1746 if (v == v - 1.)
1747 return v; /* very large numbers are assumed to be integer */
1748
1749 f = shift * ev_floor (v * (1. / shift));
1750 return f + ev_floor (v - f);
1751 }
1752
1753 /* fits into an unsigned long */
1754 return (unsigned long)v;
1755}
1756
1757#endif
1758
1759/*****************************************************************************/
1760
1761#ifdef __linux
1762# include <sys/utsname.h>
1763#endif
1764
1765ecb_noinline ecb_cold
1766static unsigned int
1767ev_linux_version (void)
1768{
1769#ifdef __linux
1770 unsigned int v = 0;
1771 struct utsname buf;
1772 int i;
1773 char *p = buf.release;
1774
1775 if (uname (&buf))
1776 return 0;
1777
1778 for (i = 3+1; --i; )
1779 {
1780 unsigned int c = 0;
1781
1782 for (;;)
1783 {
1784 if (*p >= '0' && *p <= '9')
1785 c = c * 10 + *p++ - '0';
1786 else
1787 {
1788 p += *p == '.';
1789 break;
1790 }
1791 }
1792
1793 v = (v << 8) | c;
1794 }
1795
1796 return v;
1797#else
1798 return 0;
1799#endif
1800}
1801
1802/*****************************************************************************/
1803
528#if EV_AVOID_STDIO 1804#if EV_AVOID_STDIO
529static void noinline 1805ecb_noinline ecb_cold
1806static void
530ev_printerr (const char *msg) 1807ev_printerr (const char *msg)
531{ 1808{
532 write (STDERR_FILENO, msg, strlen (msg)); 1809 write (STDERR_FILENO, msg, strlen (msg));
533} 1810}
534#endif 1811#endif
535 1812
536static void (*syserr_cb)(const char *msg); 1813static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
537 1814
1815ecb_cold
538void 1816void
539ev_set_syserr_cb (void (*cb)(const char *msg)) 1817ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
540{ 1818{
541 syserr_cb = cb; 1819 syserr_cb = cb;
542} 1820}
543 1821
544static void noinline 1822ecb_noinline ecb_cold
1823static void
545ev_syserr (const char *msg) 1824ev_syserr (const char *msg)
546{ 1825{
547 if (!msg) 1826 if (!msg)
548 msg = "(libev) system error"; 1827 msg = "(libev) system error";
549 1828
550 if (syserr_cb) 1829 if (syserr_cb)
551 syserr_cb (msg); 1830 syserr_cb (msg);
552 else 1831 else
553 { 1832 {
554#if EV_AVOID_STDIO 1833#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 1834 ev_printerr (msg);
558 ev_printerr (": "); 1835 ev_printerr (": ");
559 ev_printerr (err); 1836 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 1837 ev_printerr ("\n");
561#else 1838#else
562 perror (msg); 1839 perror (msg);
563#endif 1840#endif
564 abort (); 1841 abort ();
565 } 1842 }
566} 1843}
567 1844
568static void * 1845static void *
569ev_realloc_emul (void *ptr, long size) 1846ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
570{ 1847{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly 1848 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and 1849 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here. 1850 * the single unix specification, so work around them here.
1851 * recently, also (at least) fedora and debian started breaking it,
1852 * despite documenting it otherwise.
577 */ 1853 */
578 1854
579 if (size) 1855 if (size)
580 return realloc (ptr, size); 1856 return realloc (ptr, size);
581 1857
582 free (ptr); 1858 free (ptr);
583 return 0; 1859 return 0;
584#endif
585} 1860}
586 1861
587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1862static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
588 1863
1864ecb_cold
589void 1865void
590ev_set_allocator (void *(*cb)(void *ptr, long size)) 1866ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
591{ 1867{
592 alloc = cb; 1868 alloc = cb;
593} 1869}
594 1870
595inline_speed void * 1871inline_speed void *
… …
598 ptr = alloc (ptr, size); 1874 ptr = alloc (ptr, size);
599 1875
600 if (!ptr && size) 1876 if (!ptr && size)
601 { 1877 {
602#if EV_AVOID_STDIO 1878#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1879 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 1880#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1881 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 1882#endif
607 abort (); 1883 abort ();
608 } 1884 }
609 1885
610 return ptr; 1886 return ptr;
… …
622typedef struct 1898typedef struct
623{ 1899{
624 WL head; 1900 WL head;
625 unsigned char events; /* the events watched for */ 1901 unsigned char events; /* the events watched for */
626 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1902 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1903 unsigned char emask; /* some backends store the actual kernel mask in here */
628 unsigned char unused; 1904 unsigned char eflags; /* flags field for use by backends */
629#if EV_USE_EPOLL 1905#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 1906 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 1907#endif
632#if EV_SELECT_IS_WINSOCKET 1908#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 1909 SOCKET handle;
1910#endif
1911#if EV_USE_IOCP
1912 OVERLAPPED or, ow;
634#endif 1913#endif
635} ANFD; 1914} ANFD;
636 1915
637/* stores the pending event set for a given watcher */ 1916/* stores the pending event set for a given watcher */
638typedef struct 1917typedef struct
… …
680 #undef VAR 1959 #undef VAR
681 }; 1960 };
682 #include "ev_wrap.h" 1961 #include "ev_wrap.h"
683 1962
684 static struct ev_loop default_loop_struct; 1963 static struct ev_loop default_loop_struct;
685 struct ev_loop *ev_default_loop_ptr; 1964 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
686 1965
687#else 1966#else
688 1967
689 ev_tstamp ev_rt_now; 1968 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
690 #define VAR(name,decl) static decl; 1969 #define VAR(name,decl) static decl;
691 #include "ev_vars.h" 1970 #include "ev_vars.h"
692 #undef VAR 1971 #undef VAR
693 1972
694 static int ev_default_loop_ptr; 1973 static int ev_default_loop_ptr;
695 1974
696#endif 1975#endif
697 1976
698#if EV_FEATURE_API 1977#if EV_FEATURE_API
699# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 1978# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
700# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 1979# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
701# define EV_INVOKE_PENDING invoke_cb (EV_A) 1980# define EV_INVOKE_PENDING invoke_cb (EV_A)
702#else 1981#else
703# define EV_RELEASE_CB (void)0 1982# define EV_RELEASE_CB (void)0
704# define EV_ACQUIRE_CB (void)0 1983# define EV_ACQUIRE_CB (void)0
705# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1984# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
… …
709 1988
710/*****************************************************************************/ 1989/*****************************************************************************/
711 1990
712#ifndef EV_HAVE_EV_TIME 1991#ifndef EV_HAVE_EV_TIME
713ev_tstamp 1992ev_tstamp
714ev_time (void) 1993ev_time (void) EV_NOEXCEPT
715{ 1994{
716#if EV_USE_REALTIME 1995#if EV_USE_REALTIME
717 if (expect_true (have_realtime)) 1996 if (ecb_expect_true (have_realtime))
718 { 1997 {
719 struct timespec ts; 1998 struct timespec ts;
720 clock_gettime (CLOCK_REALTIME, &ts); 1999 clock_gettime (CLOCK_REALTIME, &ts);
721 return ts.tv_sec + ts.tv_nsec * 1e-9; 2000 return EV_TS_GET (ts);
722 } 2001 }
723#endif 2002#endif
724 2003
725 struct timeval tv; 2004 struct timeval tv;
726 gettimeofday (&tv, 0); 2005 gettimeofday (&tv, 0);
727 return tv.tv_sec + tv.tv_usec * 1e-6; 2006 return EV_TV_GET (tv);
728} 2007}
729#endif 2008#endif
730 2009
731inline_size ev_tstamp 2010inline_size ev_tstamp
732get_clock (void) 2011get_clock (void)
733{ 2012{
734#if EV_USE_MONOTONIC 2013#if EV_USE_MONOTONIC
735 if (expect_true (have_monotonic)) 2014 if (ecb_expect_true (have_monotonic))
736 { 2015 {
737 struct timespec ts; 2016 struct timespec ts;
738 clock_gettime (CLOCK_MONOTONIC, &ts); 2017 clock_gettime (CLOCK_MONOTONIC, &ts);
739 return ts.tv_sec + ts.tv_nsec * 1e-9; 2018 return EV_TS_GET (ts);
740 } 2019 }
741#endif 2020#endif
742 2021
743 return ev_time (); 2022 return ev_time ();
744} 2023}
745 2024
746#if EV_MULTIPLICITY 2025#if EV_MULTIPLICITY
747ev_tstamp 2026ev_tstamp
748ev_now (EV_P) 2027ev_now (EV_P) EV_NOEXCEPT
749{ 2028{
750 return ev_rt_now; 2029 return ev_rt_now;
751} 2030}
752#endif 2031#endif
753 2032
754void 2033void
755ev_sleep (ev_tstamp delay) 2034ev_sleep (ev_tstamp delay) EV_NOEXCEPT
756{ 2035{
757 if (delay > 0.) 2036 if (delay > 0.)
758 { 2037 {
759#if EV_USE_NANOSLEEP 2038#if EV_USE_NANOSLEEP
760 struct timespec ts; 2039 struct timespec ts;
761 2040
762 EV_TS_SET (ts, delay); 2041 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0); 2042 nanosleep (&ts, 0);
764#elif defined(_WIN32) 2043#elif defined _WIN32
2044 /* maybe this should round up, as ms is very low resolution */
2045 /* compared to select (µs) or nanosleep (ns) */
765 Sleep ((unsigned long)(delay * 1e3)); 2046 Sleep ((unsigned long)(delay * 1e3));
766#else 2047#else
767 struct timeval tv; 2048 struct timeval tv;
768 2049
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2050 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
788 2069
789 do 2070 do
790 ncur <<= 1; 2071 ncur <<= 1;
791 while (cnt > ncur); 2072 while (cnt > ncur);
792 2073
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2074 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2075 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
795 { 2076 {
796 ncur *= elem; 2077 ncur *= elem;
797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2078 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
798 ncur = ncur - sizeof (void *) * 4; 2079 ncur = ncur - sizeof (void *) * 4;
… …
800 } 2081 }
801 2082
802 return ncur; 2083 return ncur;
803} 2084}
804 2085
805static noinline void * 2086ecb_noinline ecb_cold
2087static void *
806array_realloc (int elem, void *base, int *cur, int cnt) 2088array_realloc (int elem, void *base, int *cur, int cnt)
807{ 2089{
808 *cur = array_nextsize (elem, *cur, cnt); 2090 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur); 2091 return ev_realloc (base, elem * *cur);
810} 2092}
811 2093
2094#define array_needsize_noinit(base,offset,count)
2095
812#define array_init_zero(base,count) \ 2096#define array_needsize_zerofill(base,offset,count) \
813 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2097 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
814 2098
815#define array_needsize(type,base,cur,cnt,init) \ 2099#define array_needsize(type,base,cur,cnt,init) \
816 if (expect_false ((cnt) > (cur))) \ 2100 if (ecb_expect_false ((cnt) > (cur))) \
817 { \ 2101 { \
818 int ocur_ = (cur); \ 2102 ecb_unused int ocur_ = (cur); \
819 (base) = (type *)array_realloc \ 2103 (base) = (type *)array_realloc \
820 (sizeof (type), (base), &(cur), (cnt)); \ 2104 (sizeof (type), (base), &(cur), (cnt)); \
821 init ((base) + (ocur_), (cur) - ocur_); \ 2105 init ((base), ocur_, ((cur) - ocur_)); \
822 } 2106 }
823 2107
824#if 0 2108#if 0
825#define array_slim(type,stem) \ 2109#define array_slim(type,stem) \
826 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2110 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
835 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2119 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
836 2120
837/*****************************************************************************/ 2121/*****************************************************************************/
838 2122
839/* dummy callback for pending events */ 2123/* dummy callback for pending events */
840static void noinline 2124ecb_noinline
2125static void
841pendingcb (EV_P_ ev_prepare *w, int revents) 2126pendingcb (EV_P_ ev_prepare *w, int revents)
842{ 2127{
843} 2128}
844 2129
845void noinline 2130ecb_noinline
2131void
846ev_feed_event (EV_P_ void *w, int revents) 2132ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
847{ 2133{
848 W w_ = (W)w; 2134 W w_ = (W)w;
849 int pri = ABSPRI (w_); 2135 int pri = ABSPRI (w_);
850 2136
851 if (expect_false (w_->pending)) 2137 if (ecb_expect_false (w_->pending))
852 pendings [pri][w_->pending - 1].events |= revents; 2138 pendings [pri][w_->pending - 1].events |= revents;
853 else 2139 else
854 { 2140 {
855 w_->pending = ++pendingcnt [pri]; 2141 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2142 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
857 pendings [pri][w_->pending - 1].w = w_; 2143 pendings [pri][w_->pending - 1].w = w_;
858 pendings [pri][w_->pending - 1].events = revents; 2144 pendings [pri][w_->pending - 1].events = revents;
859 } 2145 }
2146
2147 pendingpri = NUMPRI - 1;
860} 2148}
861 2149
862inline_speed void 2150inline_speed void
863feed_reverse (EV_P_ W w) 2151feed_reverse (EV_P_ W w)
864{ 2152{
865 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2153 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
866 rfeeds [rfeedcnt++] = w; 2154 rfeeds [rfeedcnt++] = w;
867} 2155}
868 2156
869inline_size void 2157inline_size void
870feed_reverse_done (EV_P_ int revents) 2158feed_reverse_done (EV_P_ int revents)
… …
905inline_speed void 2193inline_speed void
906fd_event (EV_P_ int fd, int revents) 2194fd_event (EV_P_ int fd, int revents)
907{ 2195{
908 ANFD *anfd = anfds + fd; 2196 ANFD *anfd = anfds + fd;
909 2197
910 if (expect_true (!anfd->reify)) 2198 if (ecb_expect_true (!anfd->reify))
911 fd_event_nocheck (EV_A_ fd, revents); 2199 fd_event_nocheck (EV_A_ fd, revents);
912} 2200}
913 2201
914void 2202void
915ev_feed_fd_event (EV_P_ int fd, int revents) 2203ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
916{ 2204{
917 if (fd >= 0 && fd < anfdmax) 2205 if (fd >= 0 && fd < anfdmax)
918 fd_event_nocheck (EV_A_ fd, revents); 2206 fd_event_nocheck (EV_A_ fd, revents);
919} 2207}
920 2208
… …
923inline_size void 2211inline_size void
924fd_reify (EV_P) 2212fd_reify (EV_P)
925{ 2213{
926 int i; 2214 int i;
927 2215
2216#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2217 for (i = 0; i < fdchangecnt; ++i)
2218 {
2219 int fd = fdchanges [i];
2220 ANFD *anfd = anfds + fd;
2221
2222 if (anfd->reify & EV__IOFDSET && anfd->head)
2223 {
2224 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2225
2226 if (handle != anfd->handle)
2227 {
2228 unsigned long arg;
2229
2230 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2231
2232 /* handle changed, but fd didn't - we need to do it in two steps */
2233 backend_modify (EV_A_ fd, anfd->events, 0);
2234 anfd->events = 0;
2235 anfd->handle = handle;
2236 }
2237 }
2238 }
2239#endif
2240
928 for (i = 0; i < fdchangecnt; ++i) 2241 for (i = 0; i < fdchangecnt; ++i)
929 { 2242 {
930 int fd = fdchanges [i]; 2243 int fd = fdchanges [i];
931 ANFD *anfd = anfds + fd; 2244 ANFD *anfd = anfds + fd;
932 ev_io *w; 2245 ev_io *w;
933 2246
934 unsigned char o_events = anfd->events; 2247 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 2248 unsigned char o_reify = anfd->reify;
936 2249
937 anfd->reify = 0; 2250 anfd->reify = 0;
938 2251
939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
941 {
942 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
945 }
946#endif
947
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2252 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 2253 {
950 anfd->events = 0; 2254 anfd->events = 0;
951 2255
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2256 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
953 anfd->events |= (unsigned char)w->events; 2257 anfd->events |= (unsigned char)w->events;
… …
962 2266
963 fdchangecnt = 0; 2267 fdchangecnt = 0;
964} 2268}
965 2269
966/* something about the given fd changed */ 2270/* something about the given fd changed */
967inline_size void 2271inline_size
2272void
968fd_change (EV_P_ int fd, int flags) 2273fd_change (EV_P_ int fd, int flags)
969{ 2274{
970 unsigned char reify = anfds [fd].reify; 2275 unsigned char reify = anfds [fd].reify;
971 anfds [fd].reify |= flags; 2276 anfds [fd].reify |= flags;
972 2277
973 if (expect_true (!reify)) 2278 if (ecb_expect_true (!reify))
974 { 2279 {
975 ++fdchangecnt; 2280 ++fdchangecnt;
976 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2281 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
977 fdchanges [fdchangecnt - 1] = fd; 2282 fdchanges [fdchangecnt - 1] = fd;
978 } 2283 }
979} 2284}
980 2285
981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2286/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void 2287inline_speed ecb_cold void
983fd_kill (EV_P_ int fd) 2288fd_kill (EV_P_ int fd)
984{ 2289{
985 ev_io *w; 2290 ev_io *w;
986 2291
987 while ((w = (ev_io *)anfds [fd].head)) 2292 while ((w = (ev_io *)anfds [fd].head))
… …
990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2295 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
991 } 2296 }
992} 2297}
993 2298
994/* check whether the given fd is actually valid, for error recovery */ 2299/* check whether the given fd is actually valid, for error recovery */
995inline_size int 2300inline_size ecb_cold int
996fd_valid (int fd) 2301fd_valid (int fd)
997{ 2302{
998#ifdef _WIN32 2303#ifdef _WIN32
999 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2304 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1000#else 2305#else
1001 return fcntl (fd, F_GETFD) != -1; 2306 return fcntl (fd, F_GETFD) != -1;
1002#endif 2307#endif
1003} 2308}
1004 2309
1005/* called on EBADF to verify fds */ 2310/* called on EBADF to verify fds */
1006static void noinline 2311ecb_noinline ecb_cold
2312static void
1007fd_ebadf (EV_P) 2313fd_ebadf (EV_P)
1008{ 2314{
1009 int fd; 2315 int fd;
1010 2316
1011 for (fd = 0; fd < anfdmax; ++fd) 2317 for (fd = 0; fd < anfdmax; ++fd)
… …
1013 if (!fd_valid (fd) && errno == EBADF) 2319 if (!fd_valid (fd) && errno == EBADF)
1014 fd_kill (EV_A_ fd); 2320 fd_kill (EV_A_ fd);
1015} 2321}
1016 2322
1017/* called on ENOMEM in select/poll to kill some fds and retry */ 2323/* called on ENOMEM in select/poll to kill some fds and retry */
1018static void noinline 2324ecb_noinline ecb_cold
2325static void
1019fd_enomem (EV_P) 2326fd_enomem (EV_P)
1020{ 2327{
1021 int fd; 2328 int fd;
1022 2329
1023 for (fd = anfdmax; fd--; ) 2330 for (fd = anfdmax; fd--; )
… …
1027 break; 2334 break;
1028 } 2335 }
1029} 2336}
1030 2337
1031/* usually called after fork if backend needs to re-arm all fds from scratch */ 2338/* usually called after fork if backend needs to re-arm all fds from scratch */
1032static void noinline 2339ecb_noinline
2340static void
1033fd_rearm_all (EV_P) 2341fd_rearm_all (EV_P)
1034{ 2342{
1035 int fd; 2343 int fd;
1036 2344
1037 for (fd = 0; fd < anfdmax; ++fd) 2345 for (fd = 0; fd < anfdmax; ++fd)
… …
1090 ev_tstamp minat; 2398 ev_tstamp minat;
1091 ANHE *minpos; 2399 ANHE *minpos;
1092 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2400 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1093 2401
1094 /* find minimum child */ 2402 /* find minimum child */
1095 if (expect_true (pos + DHEAP - 1 < E)) 2403 if (ecb_expect_true (pos + DHEAP - 1 < E))
1096 { 2404 {
1097 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2405 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1098 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2406 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1099 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2407 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1100 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2408 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
… …
1218 2526
1219/*****************************************************************************/ 2527/*****************************************************************************/
1220 2528
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2529#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222 2530
1223static void noinline 2531ecb_noinline ecb_cold
2532static void
1224evpipe_init (EV_P) 2533evpipe_init (EV_P)
1225{ 2534{
1226 if (!ev_is_active (&pipe_w)) 2535 if (!ev_is_active (&pipe_w))
1227 { 2536 {
2537 int fds [2];
2538
1228# if EV_USE_EVENTFD 2539# if EV_USE_EVENTFD
2540 fds [0] = -1;
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2541 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL) 2542 if (fds [1] < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0); 2543 fds [1] = eventfd (0, 0);
1232 2544
1233 if (evfd >= 0) 2545 if (fds [1] < 0)
2546# endif
1234 { 2547 {
2548 while (pipe (fds))
2549 ev_syserr ("(libev) error creating signal/async pipe");
2550
2551 fd_intern (fds [0]);
2552 }
2553
1235 evpipe [0] = -1; 2554 evpipe [0] = fds [0];
1236 fd_intern (evfd); /* doing it twice doesn't hurt */ 2555
1237 ev_io_set (&pipe_w, evfd, EV_READ); 2556 if (evpipe [1] < 0)
2557 evpipe [1] = fds [1]; /* first call, set write fd */
2558 else
2559 {
2560 /* on subsequent calls, do not change evpipe [1] */
2561 /* so that evpipe_write can always rely on its value. */
2562 /* this branch does not do anything sensible on windows, */
2563 /* so must not be executed on windows */
2564
2565 dup2 (fds [1], evpipe [1]);
2566 close (fds [1]);
2567 }
2568
2569 fd_intern (evpipe [1]);
2570
2571 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2572 ev_io_start (EV_A_ &pipe_w);
2573 ev_unref (EV_A); /* watcher should not keep loop alive */
2574 }
2575}
2576
2577inline_speed void
2578evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2579{
2580 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2581
2582 if (ecb_expect_true (*flag))
2583 return;
2584
2585 *flag = 1;
2586 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2587
2588 pipe_write_skipped = 1;
2589
2590 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2591
2592 if (pipe_write_wanted)
2593 {
2594 int old_errno;
2595
2596 pipe_write_skipped = 0;
2597 ECB_MEMORY_FENCE_RELEASE;
2598
2599 old_errno = errno; /* save errno because write will clobber it */
2600
2601#if EV_USE_EVENTFD
2602 if (evpipe [0] < 0)
2603 {
2604 uint64_t counter = 1;
2605 write (evpipe [1], &counter, sizeof (uint64_t));
1238 } 2606 }
1239 else 2607 else
1240# endif 2608#endif
1241 { 2609 {
1242 while (pipe (evpipe)) 2610#ifdef _WIN32
1243 ev_syserr ("(libev) error creating signal/async pipe"); 2611 WSABUF buf;
1244 2612 DWORD sent;
1245 fd_intern (evpipe [0]); 2613 buf.buf = (char *)&buf;
1246 fd_intern (evpipe [1]); 2614 buf.len = 1;
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2615 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2616#else
2617 write (evpipe [1], &(evpipe [1]), 1);
2618#endif
1248 } 2619 }
1249
1250 ev_io_start (EV_A_ &pipe_w);
1251 ev_unref (EV_A); /* watcher should not keep loop alive */
1252 }
1253}
1254
1255inline_size void
1256evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1257{
1258 if (!*flag)
1259 {
1260 int old_errno = errno; /* save errno because write might clobber it */
1261 char dummy;
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 /* win32 people keep sending patches that change this write() to send() */
1274 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1275 /* so when you think this write should be a send instead, please find out */
1276 /* where your send() is from - it's definitely not the microsoft send, and */
1277 /* tell me. thank you. */
1278 write (evpipe [1], &dummy, 1);
1279 2620
1280 errno = old_errno; 2621 errno = old_errno;
1281 } 2622 }
1282} 2623}
1283 2624
… …
1286static void 2627static void
1287pipecb (EV_P_ ev_io *iow, int revents) 2628pipecb (EV_P_ ev_io *iow, int revents)
1288{ 2629{
1289 int i; 2630 int i;
1290 2631
2632 if (revents & EV_READ)
2633 {
1291#if EV_USE_EVENTFD 2634#if EV_USE_EVENTFD
1292 if (evfd >= 0) 2635 if (evpipe [0] < 0)
1293 { 2636 {
1294 uint64_t counter; 2637 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 2638 read (evpipe [1], &counter, sizeof (uint64_t));
1296 } 2639 }
1297 else 2640 else
1298#endif 2641#endif
1299 { 2642 {
1300 char dummy; 2643 char dummy[4];
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2644#ifdef _WIN32
2645 WSABUF buf;
2646 DWORD recvd;
2647 DWORD flags = 0;
2648 buf.buf = dummy;
2649 buf.len = sizeof (dummy);
2650 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2651#else
1302 read (evpipe [0], &dummy, 1); 2652 read (evpipe [0], &dummy, sizeof (dummy));
2653#endif
2654 }
1303 } 2655 }
1304 2656
2657 pipe_write_skipped = 0;
2658
2659 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2660
2661#if EV_SIGNAL_ENABLE
1305 if (sig_pending) 2662 if (sig_pending)
1306 { 2663 {
1307 sig_pending = 0; 2664 sig_pending = 0;
1308 2665
2666 ECB_MEMORY_FENCE;
2667
1309 for (i = EV_NSIG - 1; i--; ) 2668 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending)) 2669 if (ecb_expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1); 2670 ev_feed_signal_event (EV_A_ i + 1);
1312 } 2671 }
2672#endif
1313 2673
1314#if EV_ASYNC_ENABLE 2674#if EV_ASYNC_ENABLE
1315 if (async_pending) 2675 if (async_pending)
1316 { 2676 {
1317 async_pending = 0; 2677 async_pending = 0;
2678
2679 ECB_MEMORY_FENCE;
1318 2680
1319 for (i = asynccnt; i--; ) 2681 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent) 2682 if (asyncs [i]->sent)
1321 { 2683 {
1322 asyncs [i]->sent = 0; 2684 asyncs [i]->sent = 0;
2685 ECB_MEMORY_FENCE_RELEASE;
1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2686 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1324 } 2687 }
1325 } 2688 }
1326#endif 2689#endif
1327} 2690}
1328 2691
1329/*****************************************************************************/ 2692/*****************************************************************************/
1330 2693
2694void
2695ev_feed_signal (int signum) EV_NOEXCEPT
2696{
2697#if EV_MULTIPLICITY
2698 EV_P;
2699 ECB_MEMORY_FENCE_ACQUIRE;
2700 EV_A = signals [signum - 1].loop;
2701
2702 if (!EV_A)
2703 return;
2704#endif
2705
2706 signals [signum - 1].pending = 1;
2707 evpipe_write (EV_A_ &sig_pending);
2708}
2709
1331static void 2710static void
1332ev_sighandler (int signum) 2711ev_sighandler (int signum)
1333{ 2712{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 2713#ifdef _WIN32
1339 signal (signum, ev_sighandler); 2714 signal (signum, ev_sighandler);
1340#endif 2715#endif
1341 2716
1342 signals [signum - 1].pending = 1; 2717 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 2718}
1345 2719
1346void noinline 2720ecb_noinline
2721void
1347ev_feed_signal_event (EV_P_ int signum) 2722ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1348{ 2723{
1349 WL w; 2724 WL w;
1350 2725
1351 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2726 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1352 return; 2727 return;
1353 2728
1354 --signum; 2729 --signum;
1355 2730
1356#if EV_MULTIPLICITY 2731#if EV_MULTIPLICITY
1357 /* it is permissible to try to feed a signal to the wrong loop */ 2732 /* it is permissible to try to feed a signal to the wrong loop */
1358 /* or, likely more useful, feeding a signal nobody is waiting for */ 2733 /* or, likely more useful, feeding a signal nobody is waiting for */
1359 2734
1360 if (expect_false (signals [signum].loop != EV_A)) 2735 if (ecb_expect_false (signals [signum].loop != EV_A))
1361 return; 2736 return;
1362#endif 2737#endif
1363 2738
1364 signals [signum].pending = 0; 2739 signals [signum].pending = 0;
2740 ECB_MEMORY_FENCE_RELEASE;
1365 2741
1366 for (w = signals [signum].head; w; w = w->next) 2742 for (w = signals [signum].head; w; w = w->next)
1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2743 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1368} 2744}
1369 2745
… …
1448 2824
1449#endif 2825#endif
1450 2826
1451/*****************************************************************************/ 2827/*****************************************************************************/
1452 2828
2829#if EV_USE_IOCP
2830# include "ev_iocp.c"
2831#endif
1453#if EV_USE_PORT 2832#if EV_USE_PORT
1454# include "ev_port.c" 2833# include "ev_port.c"
1455#endif 2834#endif
1456#if EV_USE_KQUEUE 2835#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 2836# include "ev_kqueue.c"
1458#endif 2837#endif
1459#if EV_USE_EPOLL 2838#if EV_USE_EPOLL
1460# include "ev_epoll.c" 2839# include "ev_epoll.c"
1461#endif 2840#endif
2841#if EV_USE_LINUXAIO
2842# include "ev_linuxaio.c"
2843#endif
2844#if EV_USE_IOURING
2845# include "ev_iouring.c"
2846#endif
1462#if EV_USE_POLL 2847#if EV_USE_POLL
1463# include "ev_poll.c" 2848# include "ev_poll.c"
1464#endif 2849#endif
1465#if EV_USE_SELECT 2850#if EV_USE_SELECT
1466# include "ev_select.c" 2851# include "ev_select.c"
1467#endif 2852#endif
1468 2853
1469int 2854ecb_cold int
1470ev_version_major (void) 2855ev_version_major (void) EV_NOEXCEPT
1471{ 2856{
1472 return EV_VERSION_MAJOR; 2857 return EV_VERSION_MAJOR;
1473} 2858}
1474 2859
1475int 2860ecb_cold int
1476ev_version_minor (void) 2861ev_version_minor (void) EV_NOEXCEPT
1477{ 2862{
1478 return EV_VERSION_MINOR; 2863 return EV_VERSION_MINOR;
1479} 2864}
1480 2865
1481/* return true if we are running with elevated privileges and should ignore env variables */ 2866/* return true if we are running with elevated privileges and should ignore env variables */
1482int inline_size 2867inline_size ecb_cold int
1483enable_secure (void) 2868enable_secure (void)
1484{ 2869{
1485#ifdef _WIN32 2870#ifdef _WIN32
1486 return 0; 2871 return 0;
1487#else 2872#else
1488 return getuid () != geteuid () 2873 return getuid () != geteuid ()
1489 || getgid () != getegid (); 2874 || getgid () != getegid ();
1490#endif 2875#endif
1491} 2876}
1492 2877
2878ecb_cold
1493unsigned int 2879unsigned int
1494ev_supported_backends (void) 2880ev_supported_backends (void) EV_NOEXCEPT
1495{ 2881{
1496 unsigned int flags = 0; 2882 unsigned int flags = 0;
1497 2883
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2884 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2885 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1500 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2886 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2887 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
2888 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING;
1501 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2889 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2890 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1503 2891
1504 return flags; 2892 return flags;
1505} 2893}
1506 2894
2895ecb_cold
1507unsigned int 2896unsigned int
1508ev_recommended_backends (void) 2897ev_recommended_backends (void) EV_NOEXCEPT
1509{ 2898{
1510 unsigned int flags = ev_supported_backends (); 2899 unsigned int flags = ev_supported_backends ();
1511 2900
1512#ifndef __NetBSD__ 2901#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */ 2902 /* kqueue is borked on everything but netbsd apparently */
… …
1521#endif 2910#endif
1522#ifdef __FreeBSD__ 2911#ifdef __FreeBSD__
1523 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2912 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1524#endif 2913#endif
1525 2914
2915 /* TODO: linuxaio is very experimental */
2916#if !EV_RECOMMEND_LINUXAIO
2917 flags &= ~EVBACKEND_LINUXAIO;
2918#endif
2919 /* TODO: linuxaio is super experimental */
2920#if !EV_RECOMMEND_IOURING
2921 flags &= ~EVBACKEND_IOURING;
2922#endif
2923
1526 return flags; 2924 return flags;
1527} 2925}
1528 2926
2927ecb_cold
1529unsigned int 2928unsigned int
1530ev_embeddable_backends (void) 2929ev_embeddable_backends (void) EV_NOEXCEPT
1531{ 2930{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2931 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533 2932
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2933 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */ 2934 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1536 flags &= ~EVBACKEND_EPOLL; 2935 flags &= ~EVBACKEND_EPOLL;
2936
2937 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
2938
2939 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
2940 * because our backend_fd is the epoll fd we need as fallback.
2941 * if the kernel ever is fixed, this might change...
2942 */
1537 2943
1538 return flags; 2944 return flags;
1539} 2945}
1540 2946
1541unsigned int 2947unsigned int
1542ev_backend (EV_P) 2948ev_backend (EV_P) EV_NOEXCEPT
1543{ 2949{
1544 return backend; 2950 return backend;
1545} 2951}
1546 2952
1547#if EV_FEATURE_API 2953#if EV_FEATURE_API
1548unsigned int 2954unsigned int
1549ev_iteration (EV_P) 2955ev_iteration (EV_P) EV_NOEXCEPT
1550{ 2956{
1551 return loop_count; 2957 return loop_count;
1552} 2958}
1553 2959
1554unsigned int 2960unsigned int
1555ev_depth (EV_P) 2961ev_depth (EV_P) EV_NOEXCEPT
1556{ 2962{
1557 return loop_depth; 2963 return loop_depth;
1558} 2964}
1559 2965
1560void 2966void
1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2967ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1562{ 2968{
1563 io_blocktime = interval; 2969 io_blocktime = interval;
1564} 2970}
1565 2971
1566void 2972void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2973ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1568{ 2974{
1569 timeout_blocktime = interval; 2975 timeout_blocktime = interval;
1570} 2976}
1571 2977
1572void 2978void
1573ev_set_userdata (EV_P_ void *data) 2979ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1574{ 2980{
1575 userdata = data; 2981 userdata = data;
1576} 2982}
1577 2983
1578void * 2984void *
1579ev_userdata (EV_P) 2985ev_userdata (EV_P) EV_NOEXCEPT
1580{ 2986{
1581 return userdata; 2987 return userdata;
1582} 2988}
1583 2989
2990void
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2991ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1585{ 2992{
1586 invoke_cb = invoke_pending_cb; 2993 invoke_cb = invoke_pending_cb;
1587} 2994}
1588 2995
2996void
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2997ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1590{ 2998{
1591 release_cb = release; 2999 release_cb = release;
1592 acquire_cb = acquire; 3000 acquire_cb = acquire;
1593} 3001}
1594#endif 3002#endif
1595 3003
1596/* initialise a loop structure, must be zero-initialised */ 3004/* initialise a loop structure, must be zero-initialised */
1597static void noinline 3005ecb_noinline ecb_cold
3006static void
1598loop_init (EV_P_ unsigned int flags) 3007loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1599{ 3008{
1600 if (!backend) 3009 if (!backend)
1601 { 3010 {
3011 origflags = flags;
3012
1602#if EV_USE_REALTIME 3013#if EV_USE_REALTIME
1603 if (!have_realtime) 3014 if (!have_realtime)
1604 { 3015 {
1605 struct timespec ts; 3016 struct timespec ts;
1606 3017
… …
1628 if (!(flags & EVFLAG_NOENV) 3039 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure () 3040 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS")) 3041 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS")); 3042 flags = atoi (getenv ("LIBEV_FLAGS"));
1632 3043
1633 ev_rt_now = ev_time (); 3044 ev_rt_now = ev_time ();
1634 mn_now = get_clock (); 3045 mn_now = get_clock ();
1635 now_floor = mn_now; 3046 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now; 3047 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API 3048#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending; 3049 invoke_cb = ev_invoke_pending;
1639#endif 3050#endif
1640 3051
1641 io_blocktime = 0.; 3052 io_blocktime = 0.;
1642 timeout_blocktime = 0.; 3053 timeout_blocktime = 0.;
1643 backend = 0; 3054 backend = 0;
1644 backend_fd = -1; 3055 backend_fd = -1;
1645 sig_pending = 0; 3056 sig_pending = 0;
1646#if EV_ASYNC_ENABLE 3057#if EV_ASYNC_ENABLE
1647 async_pending = 0; 3058 async_pending = 0;
1648#endif 3059#endif
3060 pipe_write_skipped = 0;
3061 pipe_write_wanted = 0;
3062 evpipe [0] = -1;
3063 evpipe [1] = -1;
1649#if EV_USE_INOTIFY 3064#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3065 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif 3066#endif
1652#if EV_USE_SIGNALFD 3067#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3068 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 3069#endif
1655 3070
1656 if (!(flags & 0x0000ffffU)) 3071 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 3072 flags |= ev_recommended_backends ();
1658 3073
3074#if EV_USE_IOCP
3075 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3076#endif
1659#if EV_USE_PORT 3077#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3078 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 3079#endif
1662#if EV_USE_KQUEUE 3080#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3081 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3082#endif
3083#if EV_USE_IOURING
3084 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3085#endif
3086#if EV_USE_LINUXAIO
3087 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1664#endif 3088#endif
1665#if EV_USE_EPOLL 3089#if EV_USE_EPOLL
1666 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3090 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1667#endif 3091#endif
1668#if EV_USE_POLL 3092#if EV_USE_POLL
1669 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3093 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1670#endif 3094#endif
1671#if EV_USE_SELECT 3095#if EV_USE_SELECT
1672 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3096 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1673#endif 3097#endif
1674 3098
1675 ev_prepare_init (&pending_w, pendingcb); 3099 ev_prepare_init (&pending_w, pendingcb);
1676 3100
1677#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3101#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1680#endif 3104#endif
1681 } 3105 }
1682} 3106}
1683 3107
1684/* free up a loop structure */ 3108/* free up a loop structure */
1685static void noinline 3109ecb_cold
3110void
1686loop_destroy (EV_P) 3111ev_loop_destroy (EV_P)
1687{ 3112{
1688 int i; 3113 int i;
3114
3115#if EV_MULTIPLICITY
3116 /* mimic free (0) */
3117 if (!EV_A)
3118 return;
3119#endif
3120
3121#if EV_CLEANUP_ENABLE
3122 /* queue cleanup watchers (and execute them) */
3123 if (ecb_expect_false (cleanupcnt))
3124 {
3125 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3126 EV_INVOKE_PENDING;
3127 }
3128#endif
3129
3130#if EV_CHILD_ENABLE
3131 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3132 {
3133 ev_ref (EV_A); /* child watcher */
3134 ev_signal_stop (EV_A_ &childev);
3135 }
3136#endif
1689 3137
1690 if (ev_is_active (&pipe_w)) 3138 if (ev_is_active (&pipe_w))
1691 { 3139 {
1692 /*ev_ref (EV_A);*/ 3140 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 3141 /*ev_io_stop (EV_A_ &pipe_w);*/
1694 3142
1695#if EV_USE_EVENTFD
1696 if (evfd >= 0)
1697 close (evfd);
1698#endif
1699
1700 if (evpipe [0] >= 0)
1701 {
1702 EV_WIN32_CLOSE_FD (evpipe [0]); 3143 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]); 3144 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 } 3145 }
1706 3146
1707#if EV_USE_SIGNALFD 3147#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w)) 3148 if (ev_is_active (&sigfd_w))
1709 close (sigfd); 3149 close (sigfd);
… …
1715#endif 3155#endif
1716 3156
1717 if (backend_fd >= 0) 3157 if (backend_fd >= 0)
1718 close (backend_fd); 3158 close (backend_fd);
1719 3159
3160#if EV_USE_IOCP
3161 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3162#endif
1720#if EV_USE_PORT 3163#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3164 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 3165#endif
1723#if EV_USE_KQUEUE 3166#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3167 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3168#endif
3169#if EV_USE_IOURING
3170 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3171#endif
3172#if EV_USE_LINUXAIO
3173 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1725#endif 3174#endif
1726#if EV_USE_EPOLL 3175#if EV_USE_EPOLL
1727 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3176 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1728#endif 3177#endif
1729#if EV_USE_POLL 3178#if EV_USE_POLL
1730 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3179 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1731#endif 3180#endif
1732#if EV_USE_SELECT 3181#if EV_USE_SELECT
1733 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3182 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1734#endif 3183#endif
1735 3184
1736 for (i = NUMPRI; i--; ) 3185 for (i = NUMPRI; i--; )
1737 { 3186 {
1738 array_free (pending, [i]); 3187 array_free (pending, [i]);
… …
1751 array_free (periodic, EMPTY); 3200 array_free (periodic, EMPTY);
1752#endif 3201#endif
1753#if EV_FORK_ENABLE 3202#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 3203 array_free (fork, EMPTY);
1755#endif 3204#endif
3205#if EV_CLEANUP_ENABLE
3206 array_free (cleanup, EMPTY);
3207#endif
1756 array_free (prepare, EMPTY); 3208 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 3209 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 3210#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 3211 array_free (async, EMPTY);
1760#endif 3212#endif
1761 3213
1762 backend = 0; 3214 backend = 0;
3215
3216#if EV_MULTIPLICITY
3217 if (ev_is_default_loop (EV_A))
3218#endif
3219 ev_default_loop_ptr = 0;
3220#if EV_MULTIPLICITY
3221 else
3222 ev_free (EV_A);
3223#endif
1763} 3224}
1764 3225
1765#if EV_USE_INOTIFY 3226#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 3227inline_size void infy_fork (EV_P);
1767#endif 3228#endif
1768 3229
1769inline_size void 3230inline_size void
1770loop_fork (EV_P) 3231loop_fork (EV_P)
1771{ 3232{
1772#if EV_USE_PORT 3233#if EV_USE_PORT
1773 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3234 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1774#endif 3235#endif
1775#if EV_USE_KQUEUE 3236#if EV_USE_KQUEUE
1776 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3237 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3238#endif
3239#if EV_USE_IOURING
3240 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3241#endif
3242#if EV_USE_LINUXAIO
3243 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1777#endif 3244#endif
1778#if EV_USE_EPOLL 3245#if EV_USE_EPOLL
1779 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3246 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1780#endif 3247#endif
1781#if EV_USE_INOTIFY 3248#if EV_USE_INOTIFY
1782 infy_fork (EV_A); 3249 infy_fork (EV_A);
1783#endif 3250#endif
1784 3251
3252#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1785 if (ev_is_active (&pipe_w)) 3253 if (ev_is_active (&pipe_w) && postfork != 2)
1786 { 3254 {
1787 /* this "locks" the handlers against writing to the pipe */ 3255 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1788 /* while we modify the fd vars */
1789 sig_pending = 1;
1790#if EV_ASYNC_ENABLE
1791 async_pending = 1;
1792#endif
1793 3256
1794 ev_ref (EV_A); 3257 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w); 3258 ev_io_stop (EV_A_ &pipe_w);
1796 3259
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0) 3260 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]); 3261 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807 3262
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A); 3263 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */ 3264 /* iterate over everything, in case we missed something before */
1811 pipecb (EV_A_ &pipe_w, EV_READ); 3265 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1812#endif
1813 } 3266 }
3267#endif
1814 3268
1815 postfork = 0; 3269 postfork = 0;
1816} 3270}
1817 3271
1818#if EV_MULTIPLICITY 3272#if EV_MULTIPLICITY
1819 3273
3274ecb_cold
1820struct ev_loop * 3275struct ev_loop *
1821ev_loop_new (unsigned int flags) 3276ev_loop_new (unsigned int flags) EV_NOEXCEPT
1822{ 3277{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3278 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824 3279
1825 memset (EV_A, 0, sizeof (struct ev_loop)); 3280 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags); 3281 loop_init (EV_A_ flags);
1827 3282
1828 if (ev_backend (EV_A)) 3283 if (ev_backend (EV_A))
1829 return EV_A; 3284 return EV_A;
1830 3285
3286 ev_free (EV_A);
1831 return 0; 3287 return 0;
1832} 3288}
1833 3289
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */ 3290#endif /* multiplicity */
1847 3291
1848#if EV_VERIFY 3292#if EV_VERIFY
1849static void noinline 3293ecb_noinline ecb_cold
3294static void
1850verify_watcher (EV_P_ W w) 3295verify_watcher (EV_P_ W w)
1851{ 3296{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3297 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853 3298
1854 if (w->pending) 3299 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3300 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856} 3301}
1857 3302
1858static void noinline 3303ecb_noinline ecb_cold
3304static void
1859verify_heap (EV_P_ ANHE *heap, int N) 3305verify_heap (EV_P_ ANHE *heap, int N)
1860{ 3306{
1861 int i; 3307 int i;
1862 3308
1863 for (i = HEAP0; i < N + HEAP0; ++i) 3309 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1868 3314
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3315 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 } 3316 }
1871} 3317}
1872 3318
1873static void noinline 3319ecb_noinline ecb_cold
3320static void
1874array_verify (EV_P_ W *ws, int cnt) 3321array_verify (EV_P_ W *ws, int cnt)
1875{ 3322{
1876 while (cnt--) 3323 while (cnt--)
1877 { 3324 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3325 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1880 } 3327 }
1881} 3328}
1882#endif 3329#endif
1883 3330
1884#if EV_FEATURE_API 3331#if EV_FEATURE_API
1885void 3332void ecb_cold
1886ev_verify (EV_P) 3333ev_verify (EV_P) EV_NOEXCEPT
1887{ 3334{
1888#if EV_VERIFY 3335#if EV_VERIFY
1889 int i; 3336 int i;
1890 WL w; 3337 WL w, w2;
1891 3338
1892 assert (activecnt >= -1); 3339 assert (activecnt >= -1);
1893 3340
1894 assert (fdchangemax >= fdchangecnt); 3341 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i) 3342 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3343 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897 3344
1898 assert (anfdmax >= 0); 3345 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i) 3346 for (i = 0; i < anfdmax; ++i)
3347 {
3348 int j = 0;
3349
1900 for (w = anfds [i].head; w; w = w->next) 3350 for (w = w2 = anfds [i].head; w; w = w->next)
1901 { 3351 {
1902 verify_watcher (EV_A_ (W)w); 3352 verify_watcher (EV_A_ (W)w);
3353
3354 if (j++ & 1)
3355 {
3356 assert (("libev: io watcher list contains a loop", w != w2));
3357 w2 = w2->next;
3358 }
3359
1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3360 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1904 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3361 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1905 } 3362 }
3363 }
1906 3364
1907 assert (timermax >= timercnt); 3365 assert (timermax >= timercnt);
1908 verify_heap (EV_A_ timers, timercnt); 3366 verify_heap (EV_A_ timers, timercnt);
1909 3367
1910#if EV_PERIODIC_ENABLE 3368#if EV_PERIODIC_ENABLE
… …
1925#if EV_FORK_ENABLE 3383#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 3384 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 3385 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 3386#endif
1929 3387
3388#if EV_CLEANUP_ENABLE
3389 assert (cleanupmax >= cleanupcnt);
3390 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3391#endif
3392
1930#if EV_ASYNC_ENABLE 3393#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 3394 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 3395 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 3396#endif
1934 3397
… …
1951#endif 3414#endif
1952} 3415}
1953#endif 3416#endif
1954 3417
1955#if EV_MULTIPLICITY 3418#if EV_MULTIPLICITY
3419ecb_cold
1956struct ev_loop * 3420struct ev_loop *
1957ev_default_loop_init (unsigned int flags)
1958#else 3421#else
1959int 3422int
3423#endif
1960ev_default_loop (unsigned int flags) 3424ev_default_loop (unsigned int flags) EV_NOEXCEPT
1961#endif
1962{ 3425{
1963 if (!ev_default_loop_ptr) 3426 if (!ev_default_loop_ptr)
1964 { 3427 {
1965#if EV_MULTIPLICITY 3428#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 3429 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1985 3448
1986 return ev_default_loop_ptr; 3449 return ev_default_loop_ptr;
1987} 3450}
1988 3451
1989void 3452void
1990ev_default_destroy (void) 3453ev_loop_fork (EV_P) EV_NOEXCEPT
1991{ 3454{
1992#if EV_MULTIPLICITY 3455 postfork = 1;
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */
2014} 3456}
2015 3457
2016/*****************************************************************************/ 3458/*****************************************************************************/
2017 3459
2018void 3460void
… …
2020{ 3462{
2021 EV_CB_INVOKE ((W)w, revents); 3463 EV_CB_INVOKE ((W)w, revents);
2022} 3464}
2023 3465
2024unsigned int 3466unsigned int
2025ev_pending_count (EV_P) 3467ev_pending_count (EV_P) EV_NOEXCEPT
2026{ 3468{
2027 int pri; 3469 int pri;
2028 unsigned int count = 0; 3470 unsigned int count = 0;
2029 3471
2030 for (pri = NUMPRI; pri--; ) 3472 for (pri = NUMPRI; pri--; )
2031 count += pendingcnt [pri]; 3473 count += pendingcnt [pri];
2032 3474
2033 return count; 3475 return count;
2034} 3476}
2035 3477
2036void noinline 3478ecb_noinline
3479void
2037ev_invoke_pending (EV_P) 3480ev_invoke_pending (EV_P)
2038{ 3481{
2039 int pri; 3482 pendingpri = NUMPRI;
2040 3483
2041 for (pri = NUMPRI; pri--; ) 3484 do
3485 {
3486 --pendingpri;
3487
3488 /* pendingpri possibly gets modified in the inner loop */
2042 while (pendingcnt [pri]) 3489 while (pendingcnt [pendingpri])
2043 { 3490 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3491 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2045 3492
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048
2049 p->w->pending = 0; 3493 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 3494 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 3495 EV_FREQUENT_CHECK;
2052 } 3496 }
3497 }
3498 while (pendingpri);
2053} 3499}
2054 3500
2055#if EV_IDLE_ENABLE 3501#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */ 3502/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */ 3503/* only when higher priorities are idle" logic */
2058inline_size void 3504inline_size void
2059idle_reify (EV_P) 3505idle_reify (EV_P)
2060{ 3506{
2061 if (expect_false (idleall)) 3507 if (ecb_expect_false (idleall))
2062 { 3508 {
2063 int pri; 3509 int pri;
2064 3510
2065 for (pri = NUMPRI; pri--; ) 3511 for (pri = NUMPRI; pri--; )
2066 { 3512 {
… …
2114 feed_reverse_done (EV_A_ EV_TIMER); 3560 feed_reverse_done (EV_A_ EV_TIMER);
2115 } 3561 }
2116} 3562}
2117 3563
2118#if EV_PERIODIC_ENABLE 3564#if EV_PERIODIC_ENABLE
3565
3566ecb_noinline
3567static void
3568periodic_recalc (EV_P_ ev_periodic *w)
3569{
3570 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3571 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3572
3573 /* the above almost always errs on the low side */
3574 while (at <= ev_rt_now)
3575 {
3576 ev_tstamp nat = at + w->interval;
3577
3578 /* when resolution fails us, we use ev_rt_now */
3579 if (ecb_expect_false (nat == at))
3580 {
3581 at = ev_rt_now;
3582 break;
3583 }
3584
3585 at = nat;
3586 }
3587
3588 ev_at (w) = at;
3589}
3590
2119/* make periodics pending */ 3591/* make periodics pending */
2120inline_size void 3592inline_size void
2121periodics_reify (EV_P) 3593periodics_reify (EV_P)
2122{ 3594{
2123 EV_FREQUENT_CHECK; 3595 EV_FREQUENT_CHECK;
2124 3596
2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3597 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2126 { 3598 {
2127 int feed_count = 0;
2128
2129 do 3599 do
2130 { 3600 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3601 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132 3602
2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3603 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2142 ANHE_at_cache (periodics [HEAP0]); 3612 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0); 3613 downheap (periodics, periodiccnt, HEAP0);
2144 } 3614 }
2145 else if (w->interval) 3615 else if (w->interval)
2146 { 3616 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3617 periodic_recalc (EV_A_ w);
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]); 3618 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0); 3619 downheap (periodics, periodiccnt, HEAP0);
2163 } 3620 }
2164 else 3621 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3622 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2173 } 3630 }
2174} 3631}
2175 3632
2176/* simply recalculate all periodics */ 3633/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3634/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline 3635ecb_noinline ecb_cold
3636static void
2179periodics_reschedule (EV_P) 3637periodics_reschedule (EV_P)
2180{ 3638{
2181 int i; 3639 int i;
2182 3640
2183 /* adjust periodics after time jump */ 3641 /* adjust periodics after time jump */
… …
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3644 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187 3645
2188 if (w->reschedule_cb) 3646 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3647 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 3648 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3649 periodic_recalc (EV_A_ w);
2192 3650
2193 ANHE_at_cache (periodics [i]); 3651 ANHE_at_cache (periodics [i]);
2194 } 3652 }
2195 3653
2196 reheap (periodics, periodiccnt); 3654 reheap (periodics, periodiccnt);
2197} 3655}
2198#endif 3656#endif
2199 3657
2200/* adjust all timers by a given offset */ 3658/* adjust all timers by a given offset */
2201static void noinline 3659ecb_noinline ecb_cold
3660static void
2202timers_reschedule (EV_P_ ev_tstamp adjust) 3661timers_reschedule (EV_P_ ev_tstamp adjust)
2203{ 3662{
2204 int i; 3663 int i;
2205 3664
2206 for (i = 0; i < timercnt; ++i) 3665 for (i = 0; i < timercnt; ++i)
… …
2215/* also detect if there was a timejump, and act accordingly */ 3674/* also detect if there was a timejump, and act accordingly */
2216inline_speed void 3675inline_speed void
2217time_update (EV_P_ ev_tstamp max_block) 3676time_update (EV_P_ ev_tstamp max_block)
2218{ 3677{
2219#if EV_USE_MONOTONIC 3678#if EV_USE_MONOTONIC
2220 if (expect_true (have_monotonic)) 3679 if (ecb_expect_true (have_monotonic))
2221 { 3680 {
2222 int i; 3681 int i;
2223 ev_tstamp odiff = rtmn_diff; 3682 ev_tstamp odiff = rtmn_diff;
2224 3683
2225 mn_now = get_clock (); 3684 mn_now = get_clock ();
2226 3685
2227 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3686 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2228 /* interpolate in the meantime */ 3687 /* interpolate in the meantime */
2229 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3688 if (ecb_expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2230 { 3689 {
2231 ev_rt_now = rtmn_diff + mn_now; 3690 ev_rt_now = rtmn_diff + mn_now;
2232 return; 3691 return;
2233 } 3692 }
2234 3693
… …
2243 * doesn't hurt either as we only do this on time-jumps or 3702 * doesn't hurt either as we only do this on time-jumps or
2244 * in the unlikely event of having been preempted here. 3703 * in the unlikely event of having been preempted here.
2245 */ 3704 */
2246 for (i = 4; --i; ) 3705 for (i = 4; --i; )
2247 { 3706 {
3707 ev_tstamp diff;
2248 rtmn_diff = ev_rt_now - mn_now; 3708 rtmn_diff = ev_rt_now - mn_now;
2249 3709
3710 diff = odiff - rtmn_diff;
3711
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3712 if (ecb_expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2251 return; /* all is well */ 3713 return; /* all is well */
2252 3714
2253 ev_rt_now = ev_time (); 3715 ev_rt_now = ev_time ();
2254 mn_now = get_clock (); 3716 mn_now = get_clock ();
2255 now_floor = mn_now; 3717 now_floor = mn_now;
… …
2264 else 3726 else
2265#endif 3727#endif
2266 { 3728 {
2267 ev_rt_now = ev_time (); 3729 ev_rt_now = ev_time ();
2268 3730
2269 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3731 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2270 { 3732 {
2271 /* adjust timers. this is easy, as the offset is the same for all of them */ 3733 /* adjust timers. this is easy, as the offset is the same for all of them */
2272 timers_reschedule (EV_A_ ev_rt_now - mn_now); 3734 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2273#if EV_PERIODIC_ENABLE 3735#if EV_PERIODIC_ENABLE
2274 periodics_reschedule (EV_A); 3736 periodics_reschedule (EV_A);
… …
2277 3739
2278 mn_now = ev_rt_now; 3740 mn_now = ev_rt_now;
2279 } 3741 }
2280} 3742}
2281 3743
2282void 3744int
2283ev_run (EV_P_ int flags) 3745ev_run (EV_P_ int flags)
2284{ 3746{
2285#if EV_FEATURE_API 3747#if EV_FEATURE_API
2286 ++loop_depth; 3748 ++loop_depth;
2287#endif 3749#endif
… …
2297#if EV_VERIFY >= 2 3759#if EV_VERIFY >= 2
2298 ev_verify (EV_A); 3760 ev_verify (EV_A);
2299#endif 3761#endif
2300 3762
2301#ifndef _WIN32 3763#ifndef _WIN32
2302 if (expect_false (curpid)) /* penalise the forking check even more */ 3764 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2303 if (expect_false (getpid () != curpid)) 3765 if (ecb_expect_false (getpid () != curpid))
2304 { 3766 {
2305 curpid = getpid (); 3767 curpid = getpid ();
2306 postfork = 1; 3768 postfork = 1;
2307 } 3769 }
2308#endif 3770#endif
2309 3771
2310#if EV_FORK_ENABLE 3772#if EV_FORK_ENABLE
2311 /* we might have forked, so queue fork handlers */ 3773 /* we might have forked, so queue fork handlers */
2312 if (expect_false (postfork)) 3774 if (ecb_expect_false (postfork))
2313 if (forkcnt) 3775 if (forkcnt)
2314 { 3776 {
2315 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3777 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2316 EV_INVOKE_PENDING; 3778 EV_INVOKE_PENDING;
2317 } 3779 }
2318#endif 3780#endif
2319 3781
2320#if EV_PREPARE_ENABLE 3782#if EV_PREPARE_ENABLE
2321 /* queue prepare watchers (and execute them) */ 3783 /* queue prepare watchers (and execute them) */
2322 if (expect_false (preparecnt)) 3784 if (ecb_expect_false (preparecnt))
2323 { 3785 {
2324 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3786 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2325 EV_INVOKE_PENDING; 3787 EV_INVOKE_PENDING;
2326 } 3788 }
2327#endif 3789#endif
2328 3790
2329 if (expect_false (loop_done)) 3791 if (ecb_expect_false (loop_done))
2330 break; 3792 break;
2331 3793
2332 /* we might have forked, so reify kernel state if necessary */ 3794 /* we might have forked, so reify kernel state if necessary */
2333 if (expect_false (postfork)) 3795 if (ecb_expect_false (postfork))
2334 loop_fork (EV_A); 3796 loop_fork (EV_A);
2335 3797
2336 /* update fd-related kernel structures */ 3798 /* update fd-related kernel structures */
2337 fd_reify (EV_A); 3799 fd_reify (EV_A);
2338 3800
… …
2345 ev_tstamp prev_mn_now = mn_now; 3807 ev_tstamp prev_mn_now = mn_now;
2346 3808
2347 /* update time to cancel out callback processing overhead */ 3809 /* update time to cancel out callback processing overhead */
2348 time_update (EV_A_ 1e100); 3810 time_update (EV_A_ 1e100);
2349 3811
3812 /* from now on, we want a pipe-wake-up */
3813 pipe_write_wanted = 1;
3814
3815 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3816
2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3817 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2351 { 3818 {
2352 waittime = MAX_BLOCKTIME; 3819 waittime = MAX_BLOCKTIME;
2353 3820
2354 if (timercnt) 3821 if (timercnt)
2355 { 3822 {
2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3823 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2357 if (waittime > to) waittime = to; 3824 if (waittime > to) waittime = to;
2358 } 3825 }
2359 3826
2360#if EV_PERIODIC_ENABLE 3827#if EV_PERIODIC_ENABLE
2361 if (periodiccnt) 3828 if (periodiccnt)
2362 { 3829 {
2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3830 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2364 if (waittime > to) waittime = to; 3831 if (waittime > to) waittime = to;
2365 } 3832 }
2366#endif 3833#endif
2367 3834
2368 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3835 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime)) 3836 if (ecb_expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime; 3837 waittime = timeout_blocktime;
2371 3838
3839 /* at this point, we NEED to wait, so we have to ensure */
3840 /* to pass a minimum nonzero value to the backend */
3841 if (ecb_expect_false (waittime < backend_mintime))
3842 waittime = backend_mintime;
3843
2372 /* extra check because io_blocktime is commonly 0 */ 3844 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime)) 3845 if (ecb_expect_false (io_blocktime))
2374 { 3846 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3847 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376 3848
2377 if (sleeptime > waittime - backend_fudge) 3849 if (sleeptime > waittime - backend_mintime)
2378 sleeptime = waittime - backend_fudge; 3850 sleeptime = waittime - backend_mintime;
2379 3851
2380 if (expect_true (sleeptime > 0.)) 3852 if (ecb_expect_true (sleeptime > 0.))
2381 { 3853 {
2382 ev_sleep (sleeptime); 3854 ev_sleep (sleeptime);
2383 waittime -= sleeptime; 3855 waittime -= sleeptime;
2384 } 3856 }
2385 } 3857 }
… …
2390#endif 3862#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3863 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime); 3864 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3865 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2394 3866
3867 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3868
3869 ECB_MEMORY_FENCE_ACQUIRE;
3870 if (pipe_write_skipped)
3871 {
3872 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3873 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3874 }
3875
2395 /* update ev_rt_now, do magic */ 3876 /* update ev_rt_now, do magic */
2396 time_update (EV_A_ waittime + sleeptime); 3877 time_update (EV_A_ waittime + sleeptime);
2397 } 3878 }
2398 3879
2399 /* queue pending timers and reschedule them */ 3880 /* queue pending timers and reschedule them */
… …
2407 idle_reify (EV_A); 3888 idle_reify (EV_A);
2408#endif 3889#endif
2409 3890
2410#if EV_CHECK_ENABLE 3891#if EV_CHECK_ENABLE
2411 /* queue check watchers, to be executed first */ 3892 /* queue check watchers, to be executed first */
2412 if (expect_false (checkcnt)) 3893 if (ecb_expect_false (checkcnt))
2413 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3894 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2414#endif 3895#endif
2415 3896
2416 EV_INVOKE_PENDING; 3897 EV_INVOKE_PENDING;
2417 } 3898 }
2418 while (expect_true ( 3899 while (ecb_expect_true (
2419 activecnt 3900 activecnt
2420 && !loop_done 3901 && !loop_done
2421 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) 3902 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2422 )); 3903 ));
2423 3904
… …
2425 loop_done = EVBREAK_CANCEL; 3906 loop_done = EVBREAK_CANCEL;
2426 3907
2427#if EV_FEATURE_API 3908#if EV_FEATURE_API
2428 --loop_depth; 3909 --loop_depth;
2429#endif 3910#endif
2430}
2431 3911
3912 return activecnt;
3913}
3914
2432void 3915void
2433ev_break (EV_P_ int how) 3916ev_break (EV_P_ int how) EV_NOEXCEPT
2434{ 3917{
2435 loop_done = how; 3918 loop_done = how;
2436} 3919}
2437 3920
2438void 3921void
2439ev_ref (EV_P) 3922ev_ref (EV_P) EV_NOEXCEPT
2440{ 3923{
2441 ++activecnt; 3924 ++activecnt;
2442} 3925}
2443 3926
2444void 3927void
2445ev_unref (EV_P) 3928ev_unref (EV_P) EV_NOEXCEPT
2446{ 3929{
2447 --activecnt; 3930 --activecnt;
2448} 3931}
2449 3932
2450void 3933void
2451ev_now_update (EV_P) 3934ev_now_update (EV_P) EV_NOEXCEPT
2452{ 3935{
2453 time_update (EV_A_ 1e100); 3936 time_update (EV_A_ 1e100);
2454} 3937}
2455 3938
2456void 3939void
2457ev_suspend (EV_P) 3940ev_suspend (EV_P) EV_NOEXCEPT
2458{ 3941{
2459 ev_now_update (EV_A); 3942 ev_now_update (EV_A);
2460} 3943}
2461 3944
2462void 3945void
2463ev_resume (EV_P) 3946ev_resume (EV_P) EV_NOEXCEPT
2464{ 3947{
2465 ev_tstamp mn_prev = mn_now; 3948 ev_tstamp mn_prev = mn_now;
2466 3949
2467 ev_now_update (EV_A); 3950 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev); 3951 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2485inline_size void 3968inline_size void
2486wlist_del (WL *head, WL elem) 3969wlist_del (WL *head, WL elem)
2487{ 3970{
2488 while (*head) 3971 while (*head)
2489 { 3972 {
2490 if (expect_true (*head == elem)) 3973 if (ecb_expect_true (*head == elem))
2491 { 3974 {
2492 *head = elem->next; 3975 *head = elem->next;
2493 break; 3976 break;
2494 } 3977 }
2495 3978
… …
2507 w->pending = 0; 3990 w->pending = 0;
2508 } 3991 }
2509} 3992}
2510 3993
2511int 3994int
2512ev_clear_pending (EV_P_ void *w) 3995ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2513{ 3996{
2514 W w_ = (W)w; 3997 W w_ = (W)w;
2515 int pending = w_->pending; 3998 int pending = w_->pending;
2516 3999
2517 if (expect_true (pending)) 4000 if (ecb_expect_true (pending))
2518 { 4001 {
2519 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4002 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2520 p->w = (W)&pending_w; 4003 p->w = (W)&pending_w;
2521 w_->pending = 0; 4004 w_->pending = 0;
2522 return p->events; 4005 return p->events;
… …
2549 w->active = 0; 4032 w->active = 0;
2550} 4033}
2551 4034
2552/*****************************************************************************/ 4035/*****************************************************************************/
2553 4036
2554void noinline 4037ecb_noinline
4038void
2555ev_io_start (EV_P_ ev_io *w) 4039ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2556{ 4040{
2557 int fd = w->fd; 4041 int fd = w->fd;
2558 4042
2559 if (expect_false (ev_is_active (w))) 4043 if (ecb_expect_false (ev_is_active (w)))
2560 return; 4044 return;
2561 4045
2562 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4046 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2563 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4047 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2564 4048
4049#if EV_VERIFY >= 2
4050 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4051#endif
2565 EV_FREQUENT_CHECK; 4052 EV_FREQUENT_CHECK;
2566 4053
2567 ev_start (EV_A_ (W)w, 1); 4054 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4055 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2569 wlist_add (&anfds[fd].head, (WL)w); 4056 wlist_add (&anfds[fd].head, (WL)w);
4057
4058 /* common bug, apparently */
4059 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2570 4060
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4061 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET; 4062 w->events &= ~EV__IOFDSET;
2573 4063
2574 EV_FREQUENT_CHECK; 4064 EV_FREQUENT_CHECK;
2575} 4065}
2576 4066
2577void noinline 4067ecb_noinline
4068void
2578ev_io_stop (EV_P_ ev_io *w) 4069ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2579{ 4070{
2580 clear_pending (EV_A_ (W)w); 4071 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w))) 4072 if (ecb_expect_false (!ev_is_active (w)))
2582 return; 4073 return;
2583 4074
2584 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4075 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2585 4076
4077#if EV_VERIFY >= 2
4078 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4079#endif
2586 EV_FREQUENT_CHECK; 4080 EV_FREQUENT_CHECK;
2587 4081
2588 wlist_del (&anfds[w->fd].head, (WL)w); 4082 wlist_del (&anfds[w->fd].head, (WL)w);
2589 ev_stop (EV_A_ (W)w); 4083 ev_stop (EV_A_ (W)w);
2590 4084
2591 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 4085 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2592 4086
2593 EV_FREQUENT_CHECK; 4087 EV_FREQUENT_CHECK;
2594} 4088}
2595 4089
2596void noinline 4090ecb_noinline
4091void
2597ev_timer_start (EV_P_ ev_timer *w) 4092ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2598{ 4093{
2599 if (expect_false (ev_is_active (w))) 4094 if (ecb_expect_false (ev_is_active (w)))
2600 return; 4095 return;
2601 4096
2602 ev_at (w) += mn_now; 4097 ev_at (w) += mn_now;
2603 4098
2604 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4099 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2605 4100
2606 EV_FREQUENT_CHECK; 4101 EV_FREQUENT_CHECK;
2607 4102
2608 ++timercnt; 4103 ++timercnt;
2609 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4104 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2610 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4105 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2611 ANHE_w (timers [ev_active (w)]) = (WT)w; 4106 ANHE_w (timers [ev_active (w)]) = (WT)w;
2612 ANHE_at_cache (timers [ev_active (w)]); 4107 ANHE_at_cache (timers [ev_active (w)]);
2613 upheap (timers, ev_active (w)); 4108 upheap (timers, ev_active (w));
2614 4109
2615 EV_FREQUENT_CHECK; 4110 EV_FREQUENT_CHECK;
2616 4111
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4112 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618} 4113}
2619 4114
2620void noinline 4115ecb_noinline
4116void
2621ev_timer_stop (EV_P_ ev_timer *w) 4117ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2622{ 4118{
2623 clear_pending (EV_A_ (W)w); 4119 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w))) 4120 if (ecb_expect_false (!ev_is_active (w)))
2625 return; 4121 return;
2626 4122
2627 EV_FREQUENT_CHECK; 4123 EV_FREQUENT_CHECK;
2628 4124
2629 { 4125 {
… …
2631 4127
2632 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4128 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2633 4129
2634 --timercnt; 4130 --timercnt;
2635 4131
2636 if (expect_true (active < timercnt + HEAP0)) 4132 if (ecb_expect_true (active < timercnt + HEAP0))
2637 { 4133 {
2638 timers [active] = timers [timercnt + HEAP0]; 4134 timers [active] = timers [timercnt + HEAP0];
2639 adjustheap (timers, timercnt, active); 4135 adjustheap (timers, timercnt, active);
2640 } 4136 }
2641 } 4137 }
… …
2645 ev_stop (EV_A_ (W)w); 4141 ev_stop (EV_A_ (W)w);
2646 4142
2647 EV_FREQUENT_CHECK; 4143 EV_FREQUENT_CHECK;
2648} 4144}
2649 4145
2650void noinline 4146ecb_noinline
4147void
2651ev_timer_again (EV_P_ ev_timer *w) 4148ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2652{ 4149{
2653 EV_FREQUENT_CHECK; 4150 EV_FREQUENT_CHECK;
4151
4152 clear_pending (EV_A_ (W)w);
2654 4153
2655 if (ev_is_active (w)) 4154 if (ev_is_active (w))
2656 { 4155 {
2657 if (w->repeat) 4156 if (w->repeat)
2658 { 4157 {
… …
2671 4170
2672 EV_FREQUENT_CHECK; 4171 EV_FREQUENT_CHECK;
2673} 4172}
2674 4173
2675ev_tstamp 4174ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w) 4175ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2677{ 4176{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4177 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679} 4178}
2680 4179
2681#if EV_PERIODIC_ENABLE 4180#if EV_PERIODIC_ENABLE
2682void noinline 4181ecb_noinline
4182void
2683ev_periodic_start (EV_P_ ev_periodic *w) 4183ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2684{ 4184{
2685 if (expect_false (ev_is_active (w))) 4185 if (ecb_expect_false (ev_is_active (w)))
2686 return; 4186 return;
2687 4187
2688 if (w->reschedule_cb) 4188 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4189 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2690 else if (w->interval) 4190 else if (w->interval)
2691 { 4191 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4192 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */ 4193 periodic_recalc (EV_A_ w);
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 } 4194 }
2696 else 4195 else
2697 ev_at (w) = w->offset; 4196 ev_at (w) = w->offset;
2698 4197
2699 EV_FREQUENT_CHECK; 4198 EV_FREQUENT_CHECK;
2700 4199
2701 ++periodiccnt; 4200 ++periodiccnt;
2702 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4201 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2703 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4202 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2704 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4203 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2705 ANHE_at_cache (periodics [ev_active (w)]); 4204 ANHE_at_cache (periodics [ev_active (w)]);
2706 upheap (periodics, ev_active (w)); 4205 upheap (periodics, ev_active (w));
2707 4206
2708 EV_FREQUENT_CHECK; 4207 EV_FREQUENT_CHECK;
2709 4208
2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4209 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2711} 4210}
2712 4211
2713void noinline 4212ecb_noinline
4213void
2714ev_periodic_stop (EV_P_ ev_periodic *w) 4214ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2715{ 4215{
2716 clear_pending (EV_A_ (W)w); 4216 clear_pending (EV_A_ (W)w);
2717 if (expect_false (!ev_is_active (w))) 4217 if (ecb_expect_false (!ev_is_active (w)))
2718 return; 4218 return;
2719 4219
2720 EV_FREQUENT_CHECK; 4220 EV_FREQUENT_CHECK;
2721 4221
2722 { 4222 {
… …
2724 4224
2725 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4225 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2726 4226
2727 --periodiccnt; 4227 --periodiccnt;
2728 4228
2729 if (expect_true (active < periodiccnt + HEAP0)) 4229 if (ecb_expect_true (active < periodiccnt + HEAP0))
2730 { 4230 {
2731 periodics [active] = periodics [periodiccnt + HEAP0]; 4231 periodics [active] = periodics [periodiccnt + HEAP0];
2732 adjustheap (periodics, periodiccnt, active); 4232 adjustheap (periodics, periodiccnt, active);
2733 } 4233 }
2734 } 4234 }
… …
2736 ev_stop (EV_A_ (W)w); 4236 ev_stop (EV_A_ (W)w);
2737 4237
2738 EV_FREQUENT_CHECK; 4238 EV_FREQUENT_CHECK;
2739} 4239}
2740 4240
2741void noinline 4241ecb_noinline
4242void
2742ev_periodic_again (EV_P_ ev_periodic *w) 4243ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2743{ 4244{
2744 /* TODO: use adjustheap and recalculation */ 4245 /* TODO: use adjustheap and recalculation */
2745 ev_periodic_stop (EV_A_ w); 4246 ev_periodic_stop (EV_A_ w);
2746 ev_periodic_start (EV_A_ w); 4247 ev_periodic_start (EV_A_ w);
2747} 4248}
… …
2751# define SA_RESTART 0 4252# define SA_RESTART 0
2752#endif 4253#endif
2753 4254
2754#if EV_SIGNAL_ENABLE 4255#if EV_SIGNAL_ENABLE
2755 4256
2756void noinline 4257ecb_noinline
4258void
2757ev_signal_start (EV_P_ ev_signal *w) 4259ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2758{ 4260{
2759 if (expect_false (ev_is_active (w))) 4261 if (ecb_expect_false (ev_is_active (w)))
2760 return; 4262 return;
2761 4263
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4264 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2763 4265
2764#if EV_MULTIPLICITY 4266#if EV_MULTIPLICITY
2765 assert (("libev: a signal must not be attached to two different loops", 4267 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4268 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767 4269
2768 signals [w->signum - 1].loop = EV_A; 4270 signals [w->signum - 1].loop = EV_A;
4271 ECB_MEMORY_FENCE_RELEASE;
2769#endif 4272#endif
2770 4273
2771 EV_FREQUENT_CHECK; 4274 EV_FREQUENT_CHECK;
2772 4275
2773#if EV_USE_SIGNALFD 4276#if EV_USE_SIGNALFD
… …
2820 sa.sa_handler = ev_sighandler; 4323 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 4324 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4325 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 4326 sigaction (w->signum, &sa, 0);
2824 4327
4328 if (origflags & EVFLAG_NOSIGMASK)
4329 {
2825 sigemptyset (&sa.sa_mask); 4330 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 4331 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4332 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4333 }
2828#endif 4334#endif
2829 } 4335 }
2830 4336
2831 EV_FREQUENT_CHECK; 4337 EV_FREQUENT_CHECK;
2832} 4338}
2833 4339
2834void noinline 4340ecb_noinline
4341void
2835ev_signal_stop (EV_P_ ev_signal *w) 4342ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2836{ 4343{
2837 clear_pending (EV_A_ (W)w); 4344 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w))) 4345 if (ecb_expect_false (!ev_is_active (w)))
2839 return; 4346 return;
2840 4347
2841 EV_FREQUENT_CHECK; 4348 EV_FREQUENT_CHECK;
2842 4349
2843 wlist_del (&signals [w->signum - 1].head, (WL)w); 4350 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
2871#endif 4378#endif
2872 4379
2873#if EV_CHILD_ENABLE 4380#if EV_CHILD_ENABLE
2874 4381
2875void 4382void
2876ev_child_start (EV_P_ ev_child *w) 4383ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2877{ 4384{
2878#if EV_MULTIPLICITY 4385#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4386 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif 4387#endif
2881 if (expect_false (ev_is_active (w))) 4388 if (ecb_expect_false (ev_is_active (w)))
2882 return; 4389 return;
2883 4390
2884 EV_FREQUENT_CHECK; 4391 EV_FREQUENT_CHECK;
2885 4392
2886 ev_start (EV_A_ (W)w, 1); 4393 ev_start (EV_A_ (W)w, 1);
… …
2888 4395
2889 EV_FREQUENT_CHECK; 4396 EV_FREQUENT_CHECK;
2890} 4397}
2891 4398
2892void 4399void
2893ev_child_stop (EV_P_ ev_child *w) 4400ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2894{ 4401{
2895 clear_pending (EV_A_ (W)w); 4402 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w))) 4403 if (ecb_expect_false (!ev_is_active (w)))
2897 return; 4404 return;
2898 4405
2899 EV_FREQUENT_CHECK; 4406 EV_FREQUENT_CHECK;
2900 4407
2901 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); 4408 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
… …
2915 4422
2916#define DEF_STAT_INTERVAL 5.0074891 4423#define DEF_STAT_INTERVAL 5.0074891
2917#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4424#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2918#define MIN_STAT_INTERVAL 0.1074891 4425#define MIN_STAT_INTERVAL 0.1074891
2919 4426
2920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4427ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2921 4428
2922#if EV_USE_INOTIFY 4429#if EV_USE_INOTIFY
2923 4430
2924/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4431/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2925# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4432# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2926 4433
2927static void noinline 4434ecb_noinline
4435static void
2928infy_add (EV_P_ ev_stat *w) 4436infy_add (EV_P_ ev_stat *w)
2929{ 4437{
2930 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4438 w->wd = inotify_add_watch (fs_fd, w->path,
4439 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4440 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4441 | IN_DONT_FOLLOW | IN_MASK_ADD);
2931 4442
2932 if (w->wd >= 0) 4443 if (w->wd >= 0)
2933 { 4444 {
2934 struct statfs sfs; 4445 struct statfs sfs;
2935 4446
… …
2939 4450
2940 if (!fs_2625) 4451 if (!fs_2625)
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4452 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2942 else if (!statfs (w->path, &sfs) 4453 else if (!statfs (w->path, &sfs)
2943 && (sfs.f_type == 0x1373 /* devfs */ 4454 && (sfs.f_type == 0x1373 /* devfs */
4455 || sfs.f_type == 0x4006 /* fat */
4456 || sfs.f_type == 0x4d44 /* msdos */
2944 || sfs.f_type == 0xEF53 /* ext2/3 */ 4457 || sfs.f_type == 0xEF53 /* ext2/3 */
4458 || sfs.f_type == 0x72b6 /* jffs2 */
4459 || sfs.f_type == 0x858458f6 /* ramfs */
4460 || sfs.f_type == 0x5346544e /* ntfs */
2945 || sfs.f_type == 0x3153464a /* jfs */ 4461 || sfs.f_type == 0x3153464a /* jfs */
4462 || sfs.f_type == 0x9123683e /* btrfs */
2946 || sfs.f_type == 0x52654973 /* reiser3 */ 4463 || sfs.f_type == 0x52654973 /* reiser3 */
2947 || sfs.f_type == 0x01021994 /* tempfs */ 4464 || sfs.f_type == 0x01021994 /* tmpfs */
2948 || sfs.f_type == 0x58465342 /* xfs */)) 4465 || sfs.f_type == 0x58465342 /* xfs */))
2949 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4466 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2950 else 4467 else
2951 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4468 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2952 } 4469 }
… …
2973 if (!pend || pend == path) 4490 if (!pend || pend == path)
2974 break; 4491 break;
2975 4492
2976 *pend = 0; 4493 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask); 4494 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 } 4495 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4496 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 } 4497 }
2981 } 4498 }
2982 4499
2983 if (w->wd >= 0) 4500 if (w->wd >= 0)
… …
2987 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4504 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2988 ev_timer_again (EV_A_ &w->timer); 4505 ev_timer_again (EV_A_ &w->timer);
2989 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4506 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2990} 4507}
2991 4508
2992static void noinline 4509ecb_noinline
4510static void
2993infy_del (EV_P_ ev_stat *w) 4511infy_del (EV_P_ ev_stat *w)
2994{ 4512{
2995 int slot; 4513 int slot;
2996 int wd = w->wd; 4514 int wd = w->wd;
2997 4515
… …
3004 4522
3005 /* remove this watcher, if others are watching it, they will rearm */ 4523 /* remove this watcher, if others are watching it, they will rearm */
3006 inotify_rm_watch (fs_fd, wd); 4524 inotify_rm_watch (fs_fd, wd);
3007} 4525}
3008 4526
3009static void noinline 4527ecb_noinline
4528static void
3010infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4529infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3011{ 4530{
3012 if (slot < 0) 4531 if (slot < 0)
3013 /* overflow, need to check for all hash slots */ 4532 /* overflow, need to check for all hash slots */
3014 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4533 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4569 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 4570 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 4571 }
3053} 4572}
3054 4573
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085}
3086
3087inline_size void 4574inline_size ecb_cold
4575void
3088ev_check_2625 (EV_P) 4576ev_check_2625 (EV_P)
3089{ 4577{
3090 /* kernels < 2.6.25 are borked 4578 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4579 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */ 4580 */
… …
3097} 4585}
3098 4586
3099inline_size int 4587inline_size int
3100infy_newfd (void) 4588infy_newfd (void)
3101{ 4589{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4590#if defined IN_CLOEXEC && defined IN_NONBLOCK
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4591 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0) 4592 if (fd >= 0)
3105 return fd; 4593 return fd;
3106#endif 4594#endif
3107 return inotify_init (); 4595 return inotify_init ();
… …
3182#else 4670#else
3183# define EV_LSTAT(p,b) lstat (p, b) 4671# define EV_LSTAT(p,b) lstat (p, b)
3184#endif 4672#endif
3185 4673
3186void 4674void
3187ev_stat_stat (EV_P_ ev_stat *w) 4675ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3188{ 4676{
3189 if (lstat (w->path, &w->attr) < 0) 4677 if (lstat (w->path, &w->attr) < 0)
3190 w->attr.st_nlink = 0; 4678 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink) 4679 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1; 4680 w->attr.st_nlink = 1;
3193} 4681}
3194 4682
3195static void noinline 4683ecb_noinline
4684static void
3196stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4685stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3197{ 4686{
3198 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4687 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3199 4688
3200 ev_statdata prev = w->attr; 4689 ev_statdata prev = w->attr;
… …
3231 ev_feed_event (EV_A_ w, EV_STAT); 4720 ev_feed_event (EV_A_ w, EV_STAT);
3232 } 4721 }
3233} 4722}
3234 4723
3235void 4724void
3236ev_stat_start (EV_P_ ev_stat *w) 4725ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3237{ 4726{
3238 if (expect_false (ev_is_active (w))) 4727 if (ecb_expect_false (ev_is_active (w)))
3239 return; 4728 return;
3240 4729
3241 ev_stat_stat (EV_A_ w); 4730 ev_stat_stat (EV_A_ w);
3242 4731
3243 if (w->interval < MIN_STAT_INTERVAL && w->interval) 4732 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3262 4751
3263 EV_FREQUENT_CHECK; 4752 EV_FREQUENT_CHECK;
3264} 4753}
3265 4754
3266void 4755void
3267ev_stat_stop (EV_P_ ev_stat *w) 4756ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3268{ 4757{
3269 clear_pending (EV_A_ (W)w); 4758 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w))) 4759 if (ecb_expect_false (!ev_is_active (w)))
3271 return; 4760 return;
3272 4761
3273 EV_FREQUENT_CHECK; 4762 EV_FREQUENT_CHECK;
3274 4763
3275#if EV_USE_INOTIFY 4764#if EV_USE_INOTIFY
… …
3288} 4777}
3289#endif 4778#endif
3290 4779
3291#if EV_IDLE_ENABLE 4780#if EV_IDLE_ENABLE
3292void 4781void
3293ev_idle_start (EV_P_ ev_idle *w) 4782ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3294{ 4783{
3295 if (expect_false (ev_is_active (w))) 4784 if (ecb_expect_false (ev_is_active (w)))
3296 return; 4785 return;
3297 4786
3298 pri_adjust (EV_A_ (W)w); 4787 pri_adjust (EV_A_ (W)w);
3299 4788
3300 EV_FREQUENT_CHECK; 4789 EV_FREQUENT_CHECK;
… …
3303 int active = ++idlecnt [ABSPRI (w)]; 4792 int active = ++idlecnt [ABSPRI (w)];
3304 4793
3305 ++idleall; 4794 ++idleall;
3306 ev_start (EV_A_ (W)w, active); 4795 ev_start (EV_A_ (W)w, active);
3307 4796
3308 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4797 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3309 idles [ABSPRI (w)][active - 1] = w; 4798 idles [ABSPRI (w)][active - 1] = w;
3310 } 4799 }
3311 4800
3312 EV_FREQUENT_CHECK; 4801 EV_FREQUENT_CHECK;
3313} 4802}
3314 4803
3315void 4804void
3316ev_idle_stop (EV_P_ ev_idle *w) 4805ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3317{ 4806{
3318 clear_pending (EV_A_ (W)w); 4807 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w))) 4808 if (ecb_expect_false (!ev_is_active (w)))
3320 return; 4809 return;
3321 4810
3322 EV_FREQUENT_CHECK; 4811 EV_FREQUENT_CHECK;
3323 4812
3324 { 4813 {
… …
3335} 4824}
3336#endif 4825#endif
3337 4826
3338#if EV_PREPARE_ENABLE 4827#if EV_PREPARE_ENABLE
3339void 4828void
3340ev_prepare_start (EV_P_ ev_prepare *w) 4829ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3341{ 4830{
3342 if (expect_false (ev_is_active (w))) 4831 if (ecb_expect_false (ev_is_active (w)))
3343 return; 4832 return;
3344 4833
3345 EV_FREQUENT_CHECK; 4834 EV_FREQUENT_CHECK;
3346 4835
3347 ev_start (EV_A_ (W)w, ++preparecnt); 4836 ev_start (EV_A_ (W)w, ++preparecnt);
3348 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4837 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3349 prepares [preparecnt - 1] = w; 4838 prepares [preparecnt - 1] = w;
3350 4839
3351 EV_FREQUENT_CHECK; 4840 EV_FREQUENT_CHECK;
3352} 4841}
3353 4842
3354void 4843void
3355ev_prepare_stop (EV_P_ ev_prepare *w) 4844ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3356{ 4845{
3357 clear_pending (EV_A_ (W)w); 4846 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w))) 4847 if (ecb_expect_false (!ev_is_active (w)))
3359 return; 4848 return;
3360 4849
3361 EV_FREQUENT_CHECK; 4850 EV_FREQUENT_CHECK;
3362 4851
3363 { 4852 {
… …
3373} 4862}
3374#endif 4863#endif
3375 4864
3376#if EV_CHECK_ENABLE 4865#if EV_CHECK_ENABLE
3377void 4866void
3378ev_check_start (EV_P_ ev_check *w) 4867ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3379{ 4868{
3380 if (expect_false (ev_is_active (w))) 4869 if (ecb_expect_false (ev_is_active (w)))
3381 return; 4870 return;
3382 4871
3383 EV_FREQUENT_CHECK; 4872 EV_FREQUENT_CHECK;
3384 4873
3385 ev_start (EV_A_ (W)w, ++checkcnt); 4874 ev_start (EV_A_ (W)w, ++checkcnt);
3386 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4875 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3387 checks [checkcnt - 1] = w; 4876 checks [checkcnt - 1] = w;
3388 4877
3389 EV_FREQUENT_CHECK; 4878 EV_FREQUENT_CHECK;
3390} 4879}
3391 4880
3392void 4881void
3393ev_check_stop (EV_P_ ev_check *w) 4882ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3394{ 4883{
3395 clear_pending (EV_A_ (W)w); 4884 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w))) 4885 if (ecb_expect_false (!ev_is_active (w)))
3397 return; 4886 return;
3398 4887
3399 EV_FREQUENT_CHECK; 4888 EV_FREQUENT_CHECK;
3400 4889
3401 { 4890 {
… …
3410 EV_FREQUENT_CHECK; 4899 EV_FREQUENT_CHECK;
3411} 4900}
3412#endif 4901#endif
3413 4902
3414#if EV_EMBED_ENABLE 4903#if EV_EMBED_ENABLE
3415void noinline 4904ecb_noinline
4905void
3416ev_embed_sweep (EV_P_ ev_embed *w) 4906ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3417{ 4907{
3418 ev_run (w->other, EVRUN_NOWAIT); 4908 ev_run (w->other, EVRUN_NOWAIT);
3419} 4909}
3420 4910
3421static void 4911static void
… …
3469 ev_idle_stop (EV_A_ idle); 4959 ev_idle_stop (EV_A_ idle);
3470} 4960}
3471#endif 4961#endif
3472 4962
3473void 4963void
3474ev_embed_start (EV_P_ ev_embed *w) 4964ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3475{ 4965{
3476 if (expect_false (ev_is_active (w))) 4966 if (ecb_expect_false (ev_is_active (w)))
3477 return; 4967 return;
3478 4968
3479 { 4969 {
3480 EV_P = w->other; 4970 EV_P = w->other;
3481 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4971 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
… …
3500 4990
3501 EV_FREQUENT_CHECK; 4991 EV_FREQUENT_CHECK;
3502} 4992}
3503 4993
3504void 4994void
3505ev_embed_stop (EV_P_ ev_embed *w) 4995ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3506{ 4996{
3507 clear_pending (EV_A_ (W)w); 4997 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w))) 4998 if (ecb_expect_false (!ev_is_active (w)))
3509 return; 4999 return;
3510 5000
3511 EV_FREQUENT_CHECK; 5001 EV_FREQUENT_CHECK;
3512 5002
3513 ev_io_stop (EV_A_ &w->io); 5003 ev_io_stop (EV_A_ &w->io);
… …
3520} 5010}
3521#endif 5011#endif
3522 5012
3523#if EV_FORK_ENABLE 5013#if EV_FORK_ENABLE
3524void 5014void
3525ev_fork_start (EV_P_ ev_fork *w) 5015ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3526{ 5016{
3527 if (expect_false (ev_is_active (w))) 5017 if (ecb_expect_false (ev_is_active (w)))
3528 return; 5018 return;
3529 5019
3530 EV_FREQUENT_CHECK; 5020 EV_FREQUENT_CHECK;
3531 5021
3532 ev_start (EV_A_ (W)w, ++forkcnt); 5022 ev_start (EV_A_ (W)w, ++forkcnt);
3533 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5023 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3534 forks [forkcnt - 1] = w; 5024 forks [forkcnt - 1] = w;
3535 5025
3536 EV_FREQUENT_CHECK; 5026 EV_FREQUENT_CHECK;
3537} 5027}
3538 5028
3539void 5029void
3540ev_fork_stop (EV_P_ ev_fork *w) 5030ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3541{ 5031{
3542 clear_pending (EV_A_ (W)w); 5032 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w))) 5033 if (ecb_expect_false (!ev_is_active (w)))
3544 return; 5034 return;
3545 5035
3546 EV_FREQUENT_CHECK; 5036 EV_FREQUENT_CHECK;
3547 5037
3548 { 5038 {
… …
3556 5046
3557 EV_FREQUENT_CHECK; 5047 EV_FREQUENT_CHECK;
3558} 5048}
3559#endif 5049#endif
3560 5050
5051#if EV_CLEANUP_ENABLE
5052void
5053ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5054{
5055 if (ecb_expect_false (ev_is_active (w)))
5056 return;
5057
5058 EV_FREQUENT_CHECK;
5059
5060 ev_start (EV_A_ (W)w, ++cleanupcnt);
5061 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5062 cleanups [cleanupcnt - 1] = w;
5063
5064 /* cleanup watchers should never keep a refcount on the loop */
5065 ev_unref (EV_A);
5066 EV_FREQUENT_CHECK;
5067}
5068
5069void
5070ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5071{
5072 clear_pending (EV_A_ (W)w);
5073 if (ecb_expect_false (!ev_is_active (w)))
5074 return;
5075
5076 EV_FREQUENT_CHECK;
5077 ev_ref (EV_A);
5078
5079 {
5080 int active = ev_active (w);
5081
5082 cleanups [active - 1] = cleanups [--cleanupcnt];
5083 ev_active (cleanups [active - 1]) = active;
5084 }
5085
5086 ev_stop (EV_A_ (W)w);
5087
5088 EV_FREQUENT_CHECK;
5089}
5090#endif
5091
3561#if EV_ASYNC_ENABLE 5092#if EV_ASYNC_ENABLE
3562void 5093void
3563ev_async_start (EV_P_ ev_async *w) 5094ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3564{ 5095{
3565 if (expect_false (ev_is_active (w))) 5096 if (ecb_expect_false (ev_is_active (w)))
3566 return; 5097 return;
3567 5098
3568 w->sent = 0; 5099 w->sent = 0;
3569 5100
3570 evpipe_init (EV_A); 5101 evpipe_init (EV_A);
3571 5102
3572 EV_FREQUENT_CHECK; 5103 EV_FREQUENT_CHECK;
3573 5104
3574 ev_start (EV_A_ (W)w, ++asynccnt); 5105 ev_start (EV_A_ (W)w, ++asynccnt);
3575 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5106 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3576 asyncs [asynccnt - 1] = w; 5107 asyncs [asynccnt - 1] = w;
3577 5108
3578 EV_FREQUENT_CHECK; 5109 EV_FREQUENT_CHECK;
3579} 5110}
3580 5111
3581void 5112void
3582ev_async_stop (EV_P_ ev_async *w) 5113ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3583{ 5114{
3584 clear_pending (EV_A_ (W)w); 5115 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w))) 5116 if (ecb_expect_false (!ev_is_active (w)))
3586 return; 5117 return;
3587 5118
3588 EV_FREQUENT_CHECK; 5119 EV_FREQUENT_CHECK;
3589 5120
3590 { 5121 {
… …
3598 5129
3599 EV_FREQUENT_CHECK; 5130 EV_FREQUENT_CHECK;
3600} 5131}
3601 5132
3602void 5133void
3603ev_async_send (EV_P_ ev_async *w) 5134ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3604{ 5135{
3605 w->sent = 1; 5136 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending); 5137 evpipe_write (EV_A_ &async_pending);
3607} 5138}
3608#endif 5139#endif
… …
3645 5176
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5177 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3647} 5178}
3648 5179
3649void 5180void
3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5181ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3651{ 5182{
3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5183 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3653
3654 if (expect_false (!once))
3655 {
3656 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3657 return;
3658 }
3659 5184
3660 once->cb = cb; 5185 once->cb = cb;
3661 once->arg = arg; 5186 once->arg = arg;
3662 5187
3663 ev_init (&once->io, once_cb_io); 5188 ev_init (&once->io, once_cb_io);
… …
3676} 5201}
3677 5202
3678/*****************************************************************************/ 5203/*****************************************************************************/
3679 5204
3680#if EV_WALK_ENABLE 5205#if EV_WALK_ENABLE
5206ecb_cold
3681void 5207void
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5208ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3683{ 5209{
3684 int i, j; 5210 int i, j;
3685 ev_watcher_list *wl, *wn; 5211 ev_watcher_list *wl, *wn;
3686 5212
3687 if (types & (EV_IO | EV_EMBED)) 5213 if (types & (EV_IO | EV_EMBED))
… …
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5256 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif 5257#endif
3732 5258
3733#if EV_IDLE_ENABLE 5259#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE) 5260 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; ) 5261 for (j = NUMPRI; j--; )
3736 for (i = idlecnt [j]; i--; ) 5262 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]); 5263 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif 5264#endif
3739 5265
3740#if EV_FORK_ENABLE 5266#if EV_FORK_ENABLE
… …
3793 5319
3794#if EV_MULTIPLICITY 5320#if EV_MULTIPLICITY
3795 #include "ev_wrap.h" 5321 #include "ev_wrap.h"
3796#endif 5322#endif
3797 5323
3798EV_CPP(})
3799

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