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Comparing libev/ev.c (file contents):
Revision 1.352 by root, Thu Oct 21 02:33:08 2010 UTC vs.
Revision 1.467 by root, Fri May 16 15:15:39 2014 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) 2007,2008,2009,2010,2011,2012,2013 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,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
57# endif 59# endif
58# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
60# endif 62# endif
61# endif 63# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
63# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
64# endif 66# endif
65 67
66# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
160# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
161# endif 163# endif
162 164
163#endif 165#endif
164 166
165#include <math.h>
166#include <stdlib.h> 167#include <stdlib.h>
167#include <string.h> 168#include <string.h>
168#include <fcntl.h> 169#include <fcntl.h>
169#include <stddef.h> 170#include <stddef.h>
170 171
… …
180 181
181#ifdef EV_H 182#ifdef EV_H
182# include EV_H 183# include EV_H
183#else 184#else
184# include "ev.h" 185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
185#endif 197#endif
186 198
187#ifndef _WIN32 199#ifndef _WIN32
188# include <sys/time.h> 200# include <sys/time.h>
189# include <sys/wait.h> 201# include <sys/wait.h>
190# include <unistd.h> 202# include <unistd.h>
191#else 203#else
192# include <io.h> 204# include <io.h>
193# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
194# include <windows.h> 207# include <windows.h>
195# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
196# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
197# endif 210# endif
198# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
207#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
208 221
209/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
210 223
211/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
212#if defined (EV_NSIG) 225#if defined EV_NSIG
213/* use what's provided */ 226/* use what's provided */
214#elif defined (NSIG) 227#elif defined NSIG
215# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
216#elif defined(_NSIG) 229#elif defined _NSIG
217# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
218#elif defined (SIGMAX) 231#elif defined SIGMAX
219# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
220#elif defined (SIG_MAX) 233#elif defined SIG_MAX
221# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
222#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
223# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
224#elif defined (MAXSIG) 237#elif defined MAXSIG
225# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
226#elif defined (MAX_SIG) 239#elif defined MAX_SIG
227# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
228#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
229# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
230#elif defined (_sys_nsig) 243#elif defined _sys_nsig
231# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
232#else 245#else
233# error "unable to find value for NSIG, please report" 246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
234/* to make it compile regardless, just remove the above line, */ 247#endif
235/* but consider reporting it, too! :) */ 248
236# define EV_NSIG 65 249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
237#endif 251#endif
238 252
239#ifndef EV_USE_CLOCK_SYSCALL 253#ifndef EV_USE_CLOCK_SYSCALL
240# if __linux && __GLIBC__ >= 2 254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
241# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
242# else 256# else
243# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
244# endif 258# endif
245#endif 259#endif
246 260
247#ifndef EV_USE_MONOTONIC 261#ifndef EV_USE_MONOTONIC
248# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
249# define EV_USE_MONOTONIC EV_FEATURE_OS 263# define EV_USE_MONOTONIC EV_FEATURE_OS
250# else 264# else
251# define EV_USE_MONOTONIC 0 265# define EV_USE_MONOTONIC 0
252# endif 266# endif
253#endif 267#endif
… …
340 354
341#ifndef EV_HEAP_CACHE_AT 355#ifndef EV_HEAP_CACHE_AT
342# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
343#endif 357#endif
344 358
359#ifdef ANDROID
360/* supposedly, android doesn't typedef fd_mask */
361# undef EV_USE_SELECT
362# define EV_USE_SELECT 0
363/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364# undef EV_USE_CLOCK_SYSCALL
365# define EV_USE_CLOCK_SYSCALL 0
366#endif
367
368/* aix's poll.h seems to cause lots of trouble */
369#ifdef _AIX
370/* AIX has a completely broken poll.h header */
371# undef EV_USE_POLL
372# define EV_USE_POLL 0
373#endif
374
345/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 375/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
346/* which makes programs even slower. might work on other unices, too. */ 376/* which makes programs even slower. might work on other unices, too. */
347#if EV_USE_CLOCK_SYSCALL 377#if EV_USE_CLOCK_SYSCALL
348# include <syscall.h> 378# include <sys/syscall.h>
349# ifdef SYS_clock_gettime 379# ifdef SYS_clock_gettime
350# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
351# undef EV_USE_MONOTONIC 381# undef EV_USE_MONOTONIC
352# define EV_USE_MONOTONIC 1 382# define EV_USE_MONOTONIC 1
353# else 383# else
… …
356# endif 386# endif
357#endif 387#endif
358 388
359/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 389/* this block fixes any misconfiguration where we know we run into trouble otherwise */
360 390
361#ifdef _AIX
362/* AIX has a completely broken poll.h header */
363# undef EV_USE_POLL
364# define EV_USE_POLL 0
365#endif
366
367#ifndef CLOCK_MONOTONIC 391#ifndef CLOCK_MONOTONIC
368# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 0 393# define EV_USE_MONOTONIC 0
370#endif 394#endif
371 395
… …
378# undef EV_USE_INOTIFY 402# undef EV_USE_INOTIFY
379# define EV_USE_INOTIFY 0 403# define EV_USE_INOTIFY 0
380#endif 404#endif
381 405
382#if !EV_USE_NANOSLEEP 406#if !EV_USE_NANOSLEEP
383# ifndef _WIN32 407/* hp-ux has it in sys/time.h, which we unconditionally include above */
408# if !defined _WIN32 && !defined __hpux
384# include <sys/select.h> 409# include <sys/select.h>
385# endif 410# endif
386#endif 411#endif
387 412
388#if EV_USE_INOTIFY 413#if EV_USE_INOTIFY
389# include <sys/utsname.h>
390# include <sys/statfs.h> 414# include <sys/statfs.h>
391# include <sys/inotify.h> 415# include <sys/inotify.h>
392/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 416/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
393# ifndef IN_DONT_FOLLOW 417# ifndef IN_DONT_FOLLOW
394# undef EV_USE_INOTIFY 418# undef EV_USE_INOTIFY
395# define EV_USE_INOTIFY 0 419# define EV_USE_INOTIFY 0
396# endif 420# endif
397#endif
398
399#if EV_SELECT_IS_WINSOCKET
400# include <winsock.h>
401#endif 421#endif
402 422
403#if EV_USE_EVENTFD 423#if EV_USE_EVENTFD
404/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 424/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
405# include <stdint.h> 425# include <stdint.h>
… …
411# define EFD_CLOEXEC O_CLOEXEC 431# define EFD_CLOEXEC O_CLOEXEC
412# else 432# else
413# define EFD_CLOEXEC 02000000 433# define EFD_CLOEXEC 02000000
414# endif 434# endif
415# endif 435# endif
416# ifdef __cplusplus
417extern "C" {
418# endif
419int (eventfd) (unsigned int initval, int flags); 436EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
420# ifdef __cplusplus
421}
422# endif
423#endif 437#endif
424 438
425#if EV_USE_SIGNALFD 439#if EV_USE_SIGNALFD
426/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 440/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
427# include <stdint.h> 441# include <stdint.h>
… …
433# define SFD_CLOEXEC O_CLOEXEC 447# define SFD_CLOEXEC O_CLOEXEC
434# else 448# else
435# define SFD_CLOEXEC 02000000 449# define SFD_CLOEXEC 02000000
436# endif 450# endif
437# endif 451# endif
438# ifdef __cplusplus
439extern "C" {
440# endif
441int signalfd (int fd, const sigset_t *mask, int flags); 452EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
442 453
443struct signalfd_siginfo 454struct signalfd_siginfo
444{ 455{
445 uint32_t ssi_signo; 456 uint32_t ssi_signo;
446 char pad[128 - sizeof (uint32_t)]; 457 char pad[128 - sizeof (uint32_t)];
447}; 458};
448# ifdef __cplusplus
449}
450# endif
451#endif 459#endif
452 460
453/**/ 461/**/
454 462
455#if EV_VERIFY >= 3 463#if EV_VERIFY >= 3
… …
457#else 465#else
458# define EV_FREQUENT_CHECK do { } while (0) 466# define EV_FREQUENT_CHECK do { } while (0)
459#endif 467#endif
460 468
461/* 469/*
462 * This is used to avoid floating point rounding problems. 470 * This is used to work around floating point rounding problems.
463 * It is added to ev_rt_now when scheduling periodics
464 * to ensure progress, time-wise, even when rounding
465 * errors are against us.
466 * This value is good at least till the year 4000. 471 * This value is good at least till the year 4000.
467 * Better solutions welcome.
468 */ 472 */
469#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 473#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
474/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
470 475
471#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 476#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
472#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 477#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
473 478
474#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 479#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
475#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 480#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
476 481
482/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
483/* ECB.H BEGIN */
484/*
485 * libecb - http://software.schmorp.de/pkg/libecb
486 *
487 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
488 * Copyright (©) 2011 Emanuele Giaquinta
489 * All rights reserved.
490 *
491 * Redistribution and use in source and binary forms, with or without modifica-
492 * tion, are permitted provided that the following conditions are met:
493 *
494 * 1. Redistributions of source code must retain the above copyright notice,
495 * this list of conditions and the following disclaimer.
496 *
497 * 2. Redistributions in binary form must reproduce the above copyright
498 * notice, this list of conditions and the following disclaimer in the
499 * documentation and/or other materials provided with the distribution.
500 *
501 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
502 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
503 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
504 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
505 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
506 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
507 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
508 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
509 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
510 * OF THE POSSIBILITY OF SUCH DAMAGE.
511 *
512 * Alternatively, the contents of this file may be used under the terms of
513 * the GNU General Public License ("GPL") version 2 or any later version,
514 * in which case the provisions of the GPL are applicable instead of
515 * the above. If you wish to allow the use of your version of this file
516 * only under the terms of the GPL and not to allow others to use your
517 * version of this file under the BSD license, indicate your decision
518 * by deleting the provisions above and replace them with the notice
519 * and other provisions required by the GPL. If you do not delete the
520 * provisions above, a recipient may use your version of this file under
521 * either the BSD or the GPL.
522 */
523
524#ifndef ECB_H
525#define ECB_H
526
527/* 16 bits major, 16 bits minor */
528#define ECB_VERSION 0x00010003
529
530#ifdef _WIN32
531 typedef signed char int8_t;
532 typedef unsigned char uint8_t;
533 typedef signed short int16_t;
534 typedef unsigned short uint16_t;
535 typedef signed int int32_t;
536 typedef unsigned int uint32_t;
477#if __GNUC__ >= 4 537 #if __GNUC__
478# define expect(expr,value) __builtin_expect ((expr),(value)) 538 typedef signed long long int64_t;
479# define noinline __attribute__ ((noinline)) 539 typedef unsigned long long uint64_t;
540 #else /* _MSC_VER || __BORLANDC__ */
541 typedef signed __int64 int64_t;
542 typedef unsigned __int64 uint64_t;
543 #endif
544 #ifdef _WIN64
545 #define ECB_PTRSIZE 8
546 typedef uint64_t uintptr_t;
547 typedef int64_t intptr_t;
548 #else
549 #define ECB_PTRSIZE 4
550 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t;
552 #endif
480#else 553#else
481# define expect(expr,value) (expr) 554 #include <inttypes.h>
482# define noinline 555 #if UINTMAX_MAX > 0xffffffffU
483# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 556 #define ECB_PTRSIZE 8
484# define inline 557 #else
558 #define ECB_PTRSIZE 4
559 #endif
485# endif 560#endif
561
562/* work around x32 idiocy by defining proper macros */
563#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
564 #if _ILP32
565 #define ECB_AMD64_X32 1
566 #else
567 #define ECB_AMD64 1
486#endif 568 #endif
569#endif
487 570
571/* many compilers define _GNUC_ to some versions but then only implement
572 * what their idiot authors think are the "more important" extensions,
573 * causing enormous grief in return for some better fake benchmark numbers.
574 * or so.
575 * we try to detect these and simply assume they are not gcc - if they have
576 * an issue with that they should have done it right in the first place.
577 */
578#ifndef ECB_GCC_VERSION
579 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
580 #define ECB_GCC_VERSION(major,minor) 0
581 #else
582 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
583 #endif
584#endif
585
586#define ECB_CPP (__cplusplus+0)
587#define ECB_CPP11 (__cplusplus >= 201103L)
588
589#if ECB_CPP
590 #define ECB_C 0
591 #define ECB_STDC_VERSION 0
592#else
593 #define ECB_C 1
594 #define ECB_STDC_VERSION __STDC_VERSION__
595#endif
596
597#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
598#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
599
600#if ECB_CPP
601 #define ECB_EXTERN_C extern "C"
602 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
603 #define ECB_EXTERN_C_END }
604#else
605 #define ECB_EXTERN_C extern
606 #define ECB_EXTERN_C_BEG
607 #define ECB_EXTERN_C_END
608#endif
609
610/*****************************************************************************/
611
612/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
613/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
614
615#if ECB_NO_THREADS
616 #define ECB_NO_SMP 1
617#endif
618
619#if ECB_NO_SMP
620 #define ECB_MEMORY_FENCE do { } while (0)
621#endif
622
623#ifndef ECB_MEMORY_FENCE
624 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
625 #if __i386 || __i386__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
631 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
636 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
637 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
641 #elif __aarch64__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
643 #elif (__sparc || __sparc__) && !__sparcv8
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
647 #elif defined __s390__ || defined __s390x__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
649 #elif defined __mips__
650 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
651 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
652 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
653 #elif defined __alpha__
654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
655 #elif defined __hppa__
656 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif defined __ia64__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
660 #elif defined __m68k__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
662 #elif defined __m88k__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
664 #elif defined __sh__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
666 #endif
667 #endif
668#endif
669
670#ifndef ECB_MEMORY_FENCE
671 #if ECB_GCC_VERSION(4,7)
672 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
676
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model.
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
686 */
687
688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
689 #define ECB_MEMORY_FENCE __sync_synchronize ()
690 #elif _MSC_VER >= 1500 /* VC++ 2008 */
691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
692 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
693 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
694 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
695 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
696 #elif _MSC_VER >= 1400 /* VC++ 2005 */
697 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
698 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
699 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
700 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
701 #elif defined _WIN32
702 #include <WinNT.h>
703 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
704 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
705 #include <mbarrier.h>
706 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
707 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
708 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
709 #elif __xlC__
710 #define ECB_MEMORY_FENCE __sync ()
711 #endif
712#endif
713
714#ifndef ECB_MEMORY_FENCE
715 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
716 /* we assume that these memory fences work on all variables/all memory accesses, */
717 /* not just C11 atomics and atomic accesses */
718 #include <stdatomic.h>
719 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
720 /* any fence other than seq_cst, which isn't very efficient for us. */
721 /* Why that is, we don't know - either the C11 memory model is quite useless */
722 /* for most usages, or gcc and clang have a bug */
723 /* I *currently* lean towards the latter, and inefficiently implement */
724 /* all three of ecb's fences as a seq_cst fence */
725 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
726 /* for all __atomic_thread_fence's except seq_cst */
727 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
728 #endif
729#endif
730
731#ifndef ECB_MEMORY_FENCE
732 #if !ECB_AVOID_PTHREADS
733 /*
734 * if you get undefined symbol references to pthread_mutex_lock,
735 * or failure to find pthread.h, then you should implement
736 * the ECB_MEMORY_FENCE operations for your cpu/compiler
737 * OR provide pthread.h and link against the posix thread library
738 * of your system.
739 */
740 #include <pthread.h>
741 #define ECB_NEEDS_PTHREADS 1
742 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
743
744 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
745 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
746 #endif
747#endif
748
749#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
750 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
751#endif
752
753#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
755#endif
756
757/*****************************************************************************/
758
759#if __cplusplus
760 #define ecb_inline static inline
761#elif ECB_GCC_VERSION(2,5)
762 #define ecb_inline static __inline__
763#elif ECB_C99
764 #define ecb_inline static inline
765#else
766 #define ecb_inline static
767#endif
768
769#if ECB_GCC_VERSION(3,3)
770 #define ecb_restrict __restrict__
771#elif ECB_C99
772 #define ecb_restrict restrict
773#else
774 #define ecb_restrict
775#endif
776
777typedef int ecb_bool;
778
779#define ECB_CONCAT_(a, b) a ## b
780#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
781#define ECB_STRINGIFY_(a) # a
782#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
783
784#define ecb_function_ ecb_inline
785
786#if ECB_GCC_VERSION(3,1)
787 #define ecb_attribute(attrlist) __attribute__(attrlist)
788 #define ecb_is_constant(expr) __builtin_constant_p (expr)
789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
791#else
792 #define ecb_attribute(attrlist)
793
794 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
797
798 #define ecb_is_constant(expr) 0
799 #define ecb_expect(expr,value) (expr)
800 #define ecb_prefetch(addr,rw,locality)
801#endif
802
803/* no emulation for ecb_decltype */
804#if ECB_GCC_VERSION(4,5)
805 #define ecb_decltype(x) __decltype(x)
806#elif ECB_GCC_VERSION(3,0)
807 #define ecb_decltype(x) __typeof(x)
808#endif
809
810#define ecb_noinline ecb_attribute ((__noinline__))
811#define ecb_unused ecb_attribute ((__unused__))
812#define ecb_const ecb_attribute ((__const__))
813#define ecb_pure ecb_attribute ((__pure__))
814
815#if ECB_C11
816 #define ecb_noreturn _Noreturn
817#else
818 #define ecb_noreturn ecb_attribute ((__noreturn__))
819#endif
820
821#if ECB_GCC_VERSION(4,3)
822 #define ecb_artificial ecb_attribute ((__artificial__))
823 #define ecb_hot ecb_attribute ((__hot__))
824 #define ecb_cold ecb_attribute ((__cold__))
825#else
826 #define ecb_artificial
827 #define ecb_hot
828 #define ecb_cold
829#endif
830
831/* put around conditional expressions if you are very sure that the */
832/* expression is mostly true or mostly false. note that these return */
833/* booleans, not the expression. */
488#define expect_false(expr) expect ((expr) != 0, 0) 834#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
489#define expect_true(expr) expect ((expr) != 0, 1) 835#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
836/* for compatibility to the rest of the world */
837#define ecb_likely(expr) ecb_expect_true (expr)
838#define ecb_unlikely(expr) ecb_expect_false (expr)
839
840/* count trailing zero bits and count # of one bits */
841#if ECB_GCC_VERSION(3,4)
842 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
843 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
844 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
845 #define ecb_ctz32(x) __builtin_ctz (x)
846 #define ecb_ctz64(x) __builtin_ctzll (x)
847 #define ecb_popcount32(x) __builtin_popcount (x)
848 /* no popcountll */
849#else
850 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
851 ecb_function_ int
852 ecb_ctz32 (uint32_t x)
853 {
854 int r = 0;
855
856 x &= ~x + 1; /* this isolates the lowest bit */
857
858#if ECB_branchless_on_i386
859 r += !!(x & 0xaaaaaaaa) << 0;
860 r += !!(x & 0xcccccccc) << 1;
861 r += !!(x & 0xf0f0f0f0) << 2;
862 r += !!(x & 0xff00ff00) << 3;
863 r += !!(x & 0xffff0000) << 4;
864#else
865 if (x & 0xaaaaaaaa) r += 1;
866 if (x & 0xcccccccc) r += 2;
867 if (x & 0xf0f0f0f0) r += 4;
868 if (x & 0xff00ff00) r += 8;
869 if (x & 0xffff0000) r += 16;
870#endif
871
872 return r;
873 }
874
875 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
876 ecb_function_ int
877 ecb_ctz64 (uint64_t x)
878 {
879 int shift = x & 0xffffffffU ? 0 : 32;
880 return ecb_ctz32 (x >> shift) + shift;
881 }
882
883 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
884 ecb_function_ int
885 ecb_popcount32 (uint32_t x)
886 {
887 x -= (x >> 1) & 0x55555555;
888 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
889 x = ((x >> 4) + x) & 0x0f0f0f0f;
890 x *= 0x01010101;
891
892 return x >> 24;
893 }
894
895 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
896 ecb_function_ int ecb_ld32 (uint32_t x)
897 {
898 int r = 0;
899
900 if (x >> 16) { x >>= 16; r += 16; }
901 if (x >> 8) { x >>= 8; r += 8; }
902 if (x >> 4) { x >>= 4; r += 4; }
903 if (x >> 2) { x >>= 2; r += 2; }
904 if (x >> 1) { r += 1; }
905
906 return r;
907 }
908
909 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
910 ecb_function_ int ecb_ld64 (uint64_t x)
911 {
912 int r = 0;
913
914 if (x >> 32) { x >>= 32; r += 32; }
915
916 return r + ecb_ld32 (x);
917 }
918#endif
919
920ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
921ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
922ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
923ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
924
925ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
926ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
927{
928 return ( (x * 0x0802U & 0x22110U)
929 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
930}
931
932ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
933ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
934{
935 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
936 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
937 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
938 x = ( x >> 8 ) | ( x << 8);
939
940 return x;
941}
942
943ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
944ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
945{
946 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
947 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
948 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
949 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
950 x = ( x >> 16 ) | ( x << 16);
951
952 return x;
953}
954
955/* popcount64 is only available on 64 bit cpus as gcc builtin */
956/* so for this version we are lazy */
957ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
958ecb_function_ int
959ecb_popcount64 (uint64_t x)
960{
961 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
962}
963
964ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
965ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
966ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
967ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
968ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
969ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
970ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
971ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
972
973ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
974ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
975ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
976ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
977ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
978ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
979ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
980ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
981
982#if ECB_GCC_VERSION(4,3)
983 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
984 #define ecb_bswap32(x) __builtin_bswap32 (x)
985 #define ecb_bswap64(x) __builtin_bswap64 (x)
986#else
987 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
988 ecb_function_ uint16_t
989 ecb_bswap16 (uint16_t x)
990 {
991 return ecb_rotl16 (x, 8);
992 }
993
994 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
995 ecb_function_ uint32_t
996 ecb_bswap32 (uint32_t x)
997 {
998 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
999 }
1000
1001 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
1002 ecb_function_ uint64_t
1003 ecb_bswap64 (uint64_t x)
1004 {
1005 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1006 }
1007#endif
1008
1009#if ECB_GCC_VERSION(4,5)
1010 #define ecb_unreachable() __builtin_unreachable ()
1011#else
1012 /* this seems to work fine, but gcc always emits a warning for it :/ */
1013 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1014 ecb_inline void ecb_unreachable (void) { }
1015#endif
1016
1017/* try to tell the compiler that some condition is definitely true */
1018#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1019
1020ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1021ecb_inline unsigned char
1022ecb_byteorder_helper (void)
1023{
1024 /* the union code still generates code under pressure in gcc, */
1025 /* but less than using pointers, and always seems to */
1026 /* successfully return a constant. */
1027 /* the reason why we have this horrible preprocessor mess */
1028 /* is to avoid it in all cases, at least on common architectures */
1029 /* or when using a recent enough gcc version (>= 4.6) */
1030#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1031 return 0x44;
1032#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1033 return 0x44;
1034#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1035 return 0x11;
1036#else
1037 union
1038 {
1039 uint32_t i;
1040 uint8_t c;
1041 } u = { 0x11223344 };
1042 return u.c;
1043#endif
1044}
1045
1046ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1047ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1048ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1049ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1050
1051#if ECB_GCC_VERSION(3,0) || ECB_C99
1052 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1053#else
1054 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1055#endif
1056
1057#if __cplusplus
1058 template<typename T>
1059 static inline T ecb_div_rd (T val, T div)
1060 {
1061 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1062 }
1063 template<typename T>
1064 static inline T ecb_div_ru (T val, T div)
1065 {
1066 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1067 }
1068#else
1069 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1070 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1071#endif
1072
1073#if ecb_cplusplus_does_not_suck
1074 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1075 template<typename T, int N>
1076 static inline int ecb_array_length (const T (&arr)[N])
1077 {
1078 return N;
1079 }
1080#else
1081 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1082#endif
1083
1084/*******************************************************************************/
1085/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1086
1087/* basically, everything uses "ieee pure-endian" floating point numbers */
1088/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1089#if 0 \
1090 || __i386 || __i386__ \
1091 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1092 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1093 || defined __s390__ || defined __s390x__ \
1094 || defined __mips__ \
1095 || defined __alpha__ \
1096 || defined __hppa__ \
1097 || defined __ia64__ \
1098 || defined __m68k__ \
1099 || defined __m88k__ \
1100 || defined __sh__ \
1101 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1102 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1103 || defined __aarch64__
1104 #define ECB_STDFP 1
1105 #include <string.h> /* for memcpy */
1106#else
1107 #define ECB_STDFP 0
1108#endif
1109
1110#ifndef ECB_NO_LIBM
1111
1112 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1113
1114 /* only the oldest of old doesn't have this one. solaris. */
1115 #ifdef INFINITY
1116 #define ECB_INFINITY INFINITY
1117 #else
1118 #define ECB_INFINITY HUGE_VAL
1119 #endif
1120
1121 #ifdef NAN
1122 #define ECB_NAN NAN
1123 #else
1124 #define ECB_NAN ECB_INFINITY
1125 #endif
1126
1127 /* converts an ieee half/binary16 to a float */
1128 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1129 ecb_function_ float
1130 ecb_binary16_to_float (uint16_t x)
1131 {
1132 int e = (x >> 10) & 0x1f;
1133 int m = x & 0x3ff;
1134 float r;
1135
1136 if (!e ) r = ldexpf (m , -24);
1137 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1138 else if (m ) r = ECB_NAN;
1139 else r = ECB_INFINITY;
1140
1141 return x & 0x8000 ? -r : r;
1142 }
1143
1144 /* convert a float to ieee single/binary32 */
1145 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1146 ecb_function_ uint32_t
1147 ecb_float_to_binary32 (float x)
1148 {
1149 uint32_t r;
1150
1151 #if ECB_STDFP
1152 memcpy (&r, &x, 4);
1153 #else
1154 /* slow emulation, works for anything but -0 */
1155 uint32_t m;
1156 int e;
1157
1158 if (x == 0e0f ) return 0x00000000U;
1159 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1160 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1161 if (x != x ) return 0x7fbfffffU;
1162
1163 m = frexpf (x, &e) * 0x1000000U;
1164
1165 r = m & 0x80000000U;
1166
1167 if (r)
1168 m = -m;
1169
1170 if (e <= -126)
1171 {
1172 m &= 0xffffffU;
1173 m >>= (-125 - e);
1174 e = -126;
1175 }
1176
1177 r |= (e + 126) << 23;
1178 r |= m & 0x7fffffU;
1179 #endif
1180
1181 return r;
1182 }
1183
1184 /* converts an ieee single/binary32 to a float */
1185 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1186 ecb_function_ float
1187 ecb_binary32_to_float (uint32_t x)
1188 {
1189 float r;
1190
1191 #if ECB_STDFP
1192 memcpy (&r, &x, 4);
1193 #else
1194 /* emulation, only works for normals and subnormals and +0 */
1195 int neg = x >> 31;
1196 int e = (x >> 23) & 0xffU;
1197
1198 x &= 0x7fffffU;
1199
1200 if (e)
1201 x |= 0x800000U;
1202 else
1203 e = 1;
1204
1205 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1206 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1207
1208 r = neg ? -r : r;
1209 #endif
1210
1211 return r;
1212 }
1213
1214 /* convert a double to ieee double/binary64 */
1215 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1216 ecb_function_ uint64_t
1217 ecb_double_to_binary64 (double x)
1218 {
1219 uint64_t r;
1220
1221 #if ECB_STDFP
1222 memcpy (&r, &x, 8);
1223 #else
1224 /* slow emulation, works for anything but -0 */
1225 uint64_t m;
1226 int e;
1227
1228 if (x == 0e0 ) return 0x0000000000000000U;
1229 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1230 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1231 if (x != x ) return 0X7ff7ffffffffffffU;
1232
1233 m = frexp (x, &e) * 0x20000000000000U;
1234
1235 r = m & 0x8000000000000000;;
1236
1237 if (r)
1238 m = -m;
1239
1240 if (e <= -1022)
1241 {
1242 m &= 0x1fffffffffffffU;
1243 m >>= (-1021 - e);
1244 e = -1022;
1245 }
1246
1247 r |= ((uint64_t)(e + 1022)) << 52;
1248 r |= m & 0xfffffffffffffU;
1249 #endif
1250
1251 return r;
1252 }
1253
1254 /* converts an ieee double/binary64 to a double */
1255 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1256 ecb_function_ double
1257 ecb_binary64_to_double (uint64_t x)
1258 {
1259 double r;
1260
1261 #if ECB_STDFP
1262 memcpy (&r, &x, 8);
1263 #else
1264 /* emulation, only works for normals and subnormals and +0 */
1265 int neg = x >> 63;
1266 int e = (x >> 52) & 0x7ffU;
1267
1268 x &= 0xfffffffffffffU;
1269
1270 if (e)
1271 x |= 0x10000000000000U;
1272 else
1273 e = 1;
1274
1275 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1276 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1277
1278 r = neg ? -r : r;
1279 #endif
1280
1281 return r;
1282 }
1283
1284#endif
1285
1286#endif
1287
1288/* ECB.H END */
1289
1290#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1291/* if your architecture doesn't need memory fences, e.g. because it is
1292 * single-cpu/core, or if you use libev in a project that doesn't use libev
1293 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1294 * libev, in which cases the memory fences become nops.
1295 * alternatively, you can remove this #error and link against libpthread,
1296 * which will then provide the memory fences.
1297 */
1298# error "memory fences not defined for your architecture, please report"
1299#endif
1300
1301#ifndef ECB_MEMORY_FENCE
1302# define ECB_MEMORY_FENCE do { } while (0)
1303# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1304# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1305#endif
1306
1307#define expect_false(cond) ecb_expect_false (cond)
1308#define expect_true(cond) ecb_expect_true (cond)
1309#define noinline ecb_noinline
1310
490#define inline_size static inline 1311#define inline_size ecb_inline
491 1312
492#if EV_FEATURE_CODE 1313#if EV_FEATURE_CODE
493# define inline_speed static inline 1314# define inline_speed ecb_inline
494#else 1315#else
495# define inline_speed static noinline 1316# define inline_speed static noinline
496#endif 1317#endif
497 1318
498#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1319#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
537# include "ev_win32.c" 1358# include "ev_win32.c"
538#endif 1359#endif
539 1360
540/*****************************************************************************/ 1361/*****************************************************************************/
541 1362
1363/* define a suitable floor function (only used by periodics atm) */
1364
1365#if EV_USE_FLOOR
1366# include <math.h>
1367# define ev_floor(v) floor (v)
1368#else
1369
1370#include <float.h>
1371
1372/* a floor() replacement function, should be independent of ev_tstamp type */
1373static ev_tstamp noinline
1374ev_floor (ev_tstamp v)
1375{
1376 /* the choice of shift factor is not terribly important */
1377#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1378 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1379#else
1380 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1381#endif
1382
1383 /* argument too large for an unsigned long? */
1384 if (expect_false (v >= shift))
1385 {
1386 ev_tstamp f;
1387
1388 if (v == v - 1.)
1389 return v; /* very large number */
1390
1391 f = shift * ev_floor (v * (1. / shift));
1392 return f + ev_floor (v - f);
1393 }
1394
1395 /* special treatment for negative args? */
1396 if (expect_false (v < 0.))
1397 {
1398 ev_tstamp f = -ev_floor (-v);
1399
1400 return f - (f == v ? 0 : 1);
1401 }
1402
1403 /* fits into an unsigned long */
1404 return (unsigned long)v;
1405}
1406
1407#endif
1408
1409/*****************************************************************************/
1410
1411#ifdef __linux
1412# include <sys/utsname.h>
1413#endif
1414
1415static unsigned int noinline ecb_cold
1416ev_linux_version (void)
1417{
1418#ifdef __linux
1419 unsigned int v = 0;
1420 struct utsname buf;
1421 int i;
1422 char *p = buf.release;
1423
1424 if (uname (&buf))
1425 return 0;
1426
1427 for (i = 3+1; --i; )
1428 {
1429 unsigned int c = 0;
1430
1431 for (;;)
1432 {
1433 if (*p >= '0' && *p <= '9')
1434 c = c * 10 + *p++ - '0';
1435 else
1436 {
1437 p += *p == '.';
1438 break;
1439 }
1440 }
1441
1442 v = (v << 8) | c;
1443 }
1444
1445 return v;
1446#else
1447 return 0;
1448#endif
1449}
1450
1451/*****************************************************************************/
1452
542#if EV_AVOID_STDIO 1453#if EV_AVOID_STDIO
543static void noinline 1454static void noinline ecb_cold
544ev_printerr (const char *msg) 1455ev_printerr (const char *msg)
545{ 1456{
546 write (STDERR_FILENO, msg, strlen (msg)); 1457 write (STDERR_FILENO, msg, strlen (msg));
547} 1458}
548#endif 1459#endif
549 1460
550static void (*syserr_cb)(const char *msg); 1461static void (*syserr_cb)(const char *msg) EV_THROW;
551 1462
552void 1463void ecb_cold
553ev_set_syserr_cb (void (*cb)(const char *msg)) 1464ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
554{ 1465{
555 syserr_cb = cb; 1466 syserr_cb = cb;
556} 1467}
557 1468
558static void noinline 1469static void noinline ecb_cold
559ev_syserr (const char *msg) 1470ev_syserr (const char *msg)
560{ 1471{
561 if (!msg) 1472 if (!msg)
562 msg = "(libev) system error"; 1473 msg = "(libev) system error";
563 1474
564 if (syserr_cb) 1475 if (syserr_cb)
565 syserr_cb (msg); 1476 syserr_cb (msg);
566 else 1477 else
567 { 1478 {
568#if EV_AVOID_STDIO 1479#if EV_AVOID_STDIO
569 const char *err = strerror (errno);
570
571 ev_printerr (msg); 1480 ev_printerr (msg);
572 ev_printerr (": "); 1481 ev_printerr (": ");
573 ev_printerr (err); 1482 ev_printerr (strerror (errno));
574 ev_printerr ("\n"); 1483 ev_printerr ("\n");
575#else 1484#else
576 perror (msg); 1485 perror (msg);
577#endif 1486#endif
578 abort (); 1487 abort ();
579 } 1488 }
580} 1489}
581 1490
582static void * 1491static void *
583ev_realloc_emul (void *ptr, long size) 1492ev_realloc_emul (void *ptr, long size) EV_THROW
584{ 1493{
585#if __GLIBC__
586 return realloc (ptr, size);
587#else
588 /* some systems, notably openbsd and darwin, fail to properly 1494 /* some systems, notably openbsd and darwin, fail to properly
589 * implement realloc (x, 0) (as required by both ansi c-89 and 1495 * implement realloc (x, 0) (as required by both ansi c-89 and
590 * the single unix specification, so work around them here. 1496 * the single unix specification, so work around them here.
1497 * recently, also (at least) fedora and debian started breaking it,
1498 * despite documenting it otherwise.
591 */ 1499 */
592 1500
593 if (size) 1501 if (size)
594 return realloc (ptr, size); 1502 return realloc (ptr, size);
595 1503
596 free (ptr); 1504 free (ptr);
597 return 0; 1505 return 0;
598#endif
599} 1506}
600 1507
601static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1508static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
602 1509
603void 1510void ecb_cold
604ev_set_allocator (void *(*cb)(void *ptr, long size)) 1511ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
605{ 1512{
606 alloc = cb; 1513 alloc = cb;
607} 1514}
608 1515
609inline_speed void * 1516inline_speed void *
… …
612 ptr = alloc (ptr, size); 1519 ptr = alloc (ptr, size);
613 1520
614 if (!ptr && size) 1521 if (!ptr && size)
615 { 1522 {
616#if EV_AVOID_STDIO 1523#if EV_AVOID_STDIO
617 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1524 ev_printerr ("(libev) memory allocation failed, aborting.\n");
618#else 1525#else
619 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1526 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
620#endif 1527#endif
621 abort (); 1528 abort ();
622 } 1529 }
623 1530
624 return ptr; 1531 return ptr;
… …
641 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1548 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
642 unsigned char unused; 1549 unsigned char unused;
643#if EV_USE_EPOLL 1550#if EV_USE_EPOLL
644 unsigned int egen; /* generation counter to counter epoll bugs */ 1551 unsigned int egen; /* generation counter to counter epoll bugs */
645#endif 1552#endif
646#if EV_SELECT_IS_WINSOCKET 1553#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
647 SOCKET handle; 1554 SOCKET handle;
1555#endif
1556#if EV_USE_IOCP
1557 OVERLAPPED or, ow;
648#endif 1558#endif
649} ANFD; 1559} ANFD;
650 1560
651/* stores the pending event set for a given watcher */ 1561/* stores the pending event set for a given watcher */
652typedef struct 1562typedef struct
… …
694 #undef VAR 1604 #undef VAR
695 }; 1605 };
696 #include "ev_wrap.h" 1606 #include "ev_wrap.h"
697 1607
698 static struct ev_loop default_loop_struct; 1608 static struct ev_loop default_loop_struct;
699 struct ev_loop *ev_default_loop_ptr; 1609 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
700 1610
701#else 1611#else
702 1612
703 ev_tstamp ev_rt_now; 1613 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
704 #define VAR(name,decl) static decl; 1614 #define VAR(name,decl) static decl;
705 #include "ev_vars.h" 1615 #include "ev_vars.h"
706 #undef VAR 1616 #undef VAR
707 1617
708 static int ev_default_loop_ptr; 1618 static int ev_default_loop_ptr;
… …
717# define EV_RELEASE_CB (void)0 1627# define EV_RELEASE_CB (void)0
718# define EV_ACQUIRE_CB (void)0 1628# define EV_ACQUIRE_CB (void)0
719# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1629# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
720#endif 1630#endif
721 1631
722#define EVUNLOOP_RECURSE 0x80 1632#define EVBREAK_RECURSE 0x80
723 1633
724/*****************************************************************************/ 1634/*****************************************************************************/
725 1635
726#ifndef EV_HAVE_EV_TIME 1636#ifndef EV_HAVE_EV_TIME
727ev_tstamp 1637ev_tstamp
728ev_time (void) 1638ev_time (void) EV_THROW
729{ 1639{
730#if EV_USE_REALTIME 1640#if EV_USE_REALTIME
731 if (expect_true (have_realtime)) 1641 if (expect_true (have_realtime))
732 { 1642 {
733 struct timespec ts; 1643 struct timespec ts;
… …
757 return ev_time (); 1667 return ev_time ();
758} 1668}
759 1669
760#if EV_MULTIPLICITY 1670#if EV_MULTIPLICITY
761ev_tstamp 1671ev_tstamp
762ev_now (EV_P) 1672ev_now (EV_P) EV_THROW
763{ 1673{
764 return ev_rt_now; 1674 return ev_rt_now;
765} 1675}
766#endif 1676#endif
767 1677
768void 1678void
769ev_sleep (ev_tstamp delay) 1679ev_sleep (ev_tstamp delay) EV_THROW
770{ 1680{
771 if (delay > 0.) 1681 if (delay > 0.)
772 { 1682 {
773#if EV_USE_NANOSLEEP 1683#if EV_USE_NANOSLEEP
774 struct timespec ts; 1684 struct timespec ts;
775 1685
776 EV_TS_SET (ts, delay); 1686 EV_TS_SET (ts, delay);
777 nanosleep (&ts, 0); 1687 nanosleep (&ts, 0);
778#elif defined(_WIN32) 1688#elif defined _WIN32
779 Sleep ((unsigned long)(delay * 1e3)); 1689 Sleep ((unsigned long)(delay * 1e3));
780#else 1690#else
781 struct timeval tv; 1691 struct timeval tv;
782 1692
783 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1693 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
802 1712
803 do 1713 do
804 ncur <<= 1; 1714 ncur <<= 1;
805 while (cnt > ncur); 1715 while (cnt > ncur);
806 1716
807 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1717 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
808 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1718 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
809 { 1719 {
810 ncur *= elem; 1720 ncur *= elem;
811 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1721 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
812 ncur = ncur - sizeof (void *) * 4; 1722 ncur = ncur - sizeof (void *) * 4;
… …
814 } 1724 }
815 1725
816 return ncur; 1726 return ncur;
817} 1727}
818 1728
819static noinline void * 1729static void * noinline ecb_cold
820array_realloc (int elem, void *base, int *cur, int cnt) 1730array_realloc (int elem, void *base, int *cur, int cnt)
821{ 1731{
822 *cur = array_nextsize (elem, *cur, cnt); 1732 *cur = array_nextsize (elem, *cur, cnt);
823 return ev_realloc (base, elem * *cur); 1733 return ev_realloc (base, elem * *cur);
824} 1734}
… …
827 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1737 memset ((void *)(base), 0, sizeof (*(base)) * (count))
828 1738
829#define array_needsize(type,base,cur,cnt,init) \ 1739#define array_needsize(type,base,cur,cnt,init) \
830 if (expect_false ((cnt) > (cur))) \ 1740 if (expect_false ((cnt) > (cur))) \
831 { \ 1741 { \
832 int ocur_ = (cur); \ 1742 int ecb_unused ocur_ = (cur); \
833 (base) = (type *)array_realloc \ 1743 (base) = (type *)array_realloc \
834 (sizeof (type), (base), &(cur), (cnt)); \ 1744 (sizeof (type), (base), &(cur), (cnt)); \
835 init ((base) + (ocur_), (cur) - ocur_); \ 1745 init ((base) + (ocur_), (cur) - ocur_); \
836 } 1746 }
837 1747
… …
855pendingcb (EV_P_ ev_prepare *w, int revents) 1765pendingcb (EV_P_ ev_prepare *w, int revents)
856{ 1766{
857} 1767}
858 1768
859void noinline 1769void noinline
860ev_feed_event (EV_P_ void *w, int revents) 1770ev_feed_event (EV_P_ void *w, int revents) EV_THROW
861{ 1771{
862 W w_ = (W)w; 1772 W w_ = (W)w;
863 int pri = ABSPRI (w_); 1773 int pri = ABSPRI (w_);
864 1774
865 if (expect_false (w_->pending)) 1775 if (expect_false (w_->pending))
… …
869 w_->pending = ++pendingcnt [pri]; 1779 w_->pending = ++pendingcnt [pri];
870 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1780 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
871 pendings [pri][w_->pending - 1].w = w_; 1781 pendings [pri][w_->pending - 1].w = w_;
872 pendings [pri][w_->pending - 1].events = revents; 1782 pendings [pri][w_->pending - 1].events = revents;
873 } 1783 }
1784
1785 pendingpri = NUMPRI - 1;
874} 1786}
875 1787
876inline_speed void 1788inline_speed void
877feed_reverse (EV_P_ W w) 1789feed_reverse (EV_P_ W w)
878{ 1790{
… …
924 if (expect_true (!anfd->reify)) 1836 if (expect_true (!anfd->reify))
925 fd_event_nocheck (EV_A_ fd, revents); 1837 fd_event_nocheck (EV_A_ fd, revents);
926} 1838}
927 1839
928void 1840void
929ev_feed_fd_event (EV_P_ int fd, int revents) 1841ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
930{ 1842{
931 if (fd >= 0 && fd < anfdmax) 1843 if (fd >= 0 && fd < anfdmax)
932 fd_event_nocheck (EV_A_ fd, revents); 1844 fd_event_nocheck (EV_A_ fd, revents);
933} 1845}
934 1846
… …
937inline_size void 1849inline_size void
938fd_reify (EV_P) 1850fd_reify (EV_P)
939{ 1851{
940 int i; 1852 int i;
941 1853
1854#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1855 for (i = 0; i < fdchangecnt; ++i)
1856 {
1857 int fd = fdchanges [i];
1858 ANFD *anfd = anfds + fd;
1859
1860 if (anfd->reify & EV__IOFDSET && anfd->head)
1861 {
1862 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1863
1864 if (handle != anfd->handle)
1865 {
1866 unsigned long arg;
1867
1868 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1869
1870 /* handle changed, but fd didn't - we need to do it in two steps */
1871 backend_modify (EV_A_ fd, anfd->events, 0);
1872 anfd->events = 0;
1873 anfd->handle = handle;
1874 }
1875 }
1876 }
1877#endif
1878
942 for (i = 0; i < fdchangecnt; ++i) 1879 for (i = 0; i < fdchangecnt; ++i)
943 { 1880 {
944 int fd = fdchanges [i]; 1881 int fd = fdchanges [i];
945 ANFD *anfd = anfds + fd; 1882 ANFD *anfd = anfds + fd;
946 ev_io *w; 1883 ev_io *w;
… …
948 unsigned char o_events = anfd->events; 1885 unsigned char o_events = anfd->events;
949 unsigned char o_reify = anfd->reify; 1886 unsigned char o_reify = anfd->reify;
950 1887
951 anfd->reify = 0; 1888 anfd->reify = 0;
952 1889
953#if EV_SELECT_IS_WINSOCKET
954 if (o_reify & EV__IOFDSET)
955 {
956 unsigned long arg;
957 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
958 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
959 }
960#endif
961
962 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1890 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
963 { 1891 {
964 anfd->events = 0; 1892 anfd->events = 0;
965 1893
966 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1894 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
991 fdchanges [fdchangecnt - 1] = fd; 1919 fdchanges [fdchangecnt - 1] = fd;
992 } 1920 }
993} 1921}
994 1922
995/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1923/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
996inline_speed void 1924inline_speed void ecb_cold
997fd_kill (EV_P_ int fd) 1925fd_kill (EV_P_ int fd)
998{ 1926{
999 ev_io *w; 1927 ev_io *w;
1000 1928
1001 while ((w = (ev_io *)anfds [fd].head)) 1929 while ((w = (ev_io *)anfds [fd].head))
… …
1004 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1932 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1005 } 1933 }
1006} 1934}
1007 1935
1008/* check whether the given fd is actually valid, for error recovery */ 1936/* check whether the given fd is actually valid, for error recovery */
1009inline_size int 1937inline_size int ecb_cold
1010fd_valid (int fd) 1938fd_valid (int fd)
1011{ 1939{
1012#ifdef _WIN32 1940#ifdef _WIN32
1013 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1941 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1014#else 1942#else
1015 return fcntl (fd, F_GETFD) != -1; 1943 return fcntl (fd, F_GETFD) != -1;
1016#endif 1944#endif
1017} 1945}
1018 1946
1019/* called on EBADF to verify fds */ 1947/* called on EBADF to verify fds */
1020static void noinline 1948static void noinline ecb_cold
1021fd_ebadf (EV_P) 1949fd_ebadf (EV_P)
1022{ 1950{
1023 int fd; 1951 int fd;
1024 1952
1025 for (fd = 0; fd < anfdmax; ++fd) 1953 for (fd = 0; fd < anfdmax; ++fd)
… …
1027 if (!fd_valid (fd) && errno == EBADF) 1955 if (!fd_valid (fd) && errno == EBADF)
1028 fd_kill (EV_A_ fd); 1956 fd_kill (EV_A_ fd);
1029} 1957}
1030 1958
1031/* called on ENOMEM in select/poll to kill some fds and retry */ 1959/* called on ENOMEM in select/poll to kill some fds and retry */
1032static void noinline 1960static void noinline ecb_cold
1033fd_enomem (EV_P) 1961fd_enomem (EV_P)
1034{ 1962{
1035 int fd; 1963 int fd;
1036 1964
1037 for (fd = anfdmax; fd--; ) 1965 for (fd = anfdmax; fd--; )
… …
1232 2160
1233/*****************************************************************************/ 2161/*****************************************************************************/
1234 2162
1235#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2163#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1236 2164
1237static void noinline 2165static void noinline ecb_cold
1238evpipe_init (EV_P) 2166evpipe_init (EV_P)
1239{ 2167{
1240 if (!ev_is_active (&pipe_w)) 2168 if (!ev_is_active (&pipe_w))
1241 { 2169 {
2170 int fds [2];
2171
1242# if EV_USE_EVENTFD 2172# if EV_USE_EVENTFD
2173 fds [0] = -1;
1243 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2174 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1244 if (evfd < 0 && errno == EINVAL) 2175 if (fds [1] < 0 && errno == EINVAL)
1245 evfd = eventfd (0, 0); 2176 fds [1] = eventfd (0, 0);
1246 2177
1247 if (evfd >= 0) 2178 if (fds [1] < 0)
2179# endif
1248 { 2180 {
2181 while (pipe (fds))
2182 ev_syserr ("(libev) error creating signal/async pipe");
2183
2184 fd_intern (fds [0]);
2185 }
2186
1249 evpipe [0] = -1; 2187 evpipe [0] = fds [0];
1250 fd_intern (evfd); /* doing it twice doesn't hurt */ 2188
1251 ev_io_set (&pipe_w, evfd, EV_READ); 2189 if (evpipe [1] < 0)
2190 evpipe [1] = fds [1]; /* first call, set write fd */
2191 else
2192 {
2193 /* on subsequent calls, do not change evpipe [1] */
2194 /* so that evpipe_write can always rely on its value. */
2195 /* this branch does not do anything sensible on windows, */
2196 /* so must not be executed on windows */
2197
2198 dup2 (fds [1], evpipe [1]);
2199 close (fds [1]);
2200 }
2201
2202 fd_intern (evpipe [1]);
2203
2204 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2205 ev_io_start (EV_A_ &pipe_w);
2206 ev_unref (EV_A); /* watcher should not keep loop alive */
2207 }
2208}
2209
2210inline_speed void
2211evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2212{
2213 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2214
2215 if (expect_true (*flag))
2216 return;
2217
2218 *flag = 1;
2219 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2220
2221 pipe_write_skipped = 1;
2222
2223 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2224
2225 if (pipe_write_wanted)
2226 {
2227 int old_errno;
2228
2229 pipe_write_skipped = 0;
2230 ECB_MEMORY_FENCE_RELEASE;
2231
2232 old_errno = errno; /* save errno because write will clobber it */
2233
2234#if EV_USE_EVENTFD
2235 if (evpipe [0] < 0)
2236 {
2237 uint64_t counter = 1;
2238 write (evpipe [1], &counter, sizeof (uint64_t));
1252 } 2239 }
1253 else 2240 else
1254# endif 2241#endif
1255 { 2242 {
1256 while (pipe (evpipe)) 2243#ifdef _WIN32
1257 ev_syserr ("(libev) error creating signal/async pipe"); 2244 WSABUF buf;
1258 2245 DWORD sent;
1259 fd_intern (evpipe [0]); 2246 buf.buf = &buf;
1260 fd_intern (evpipe [1]); 2247 buf.len = 1;
1261 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2248 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2249#else
2250 write (evpipe [1], &(evpipe [1]), 1);
2251#endif
1262 } 2252 }
1263
1264 ev_io_start (EV_A_ &pipe_w);
1265 ev_unref (EV_A); /* watcher should not keep loop alive */
1266 }
1267}
1268
1269inline_size void
1270evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1271{
1272 if (!*flag)
1273 {
1274 int old_errno = errno; /* save errno because write might clobber it */
1275 char dummy;
1276
1277 *flag = 1;
1278
1279#if EV_USE_EVENTFD
1280 if (evfd >= 0)
1281 {
1282 uint64_t counter = 1;
1283 write (evfd, &counter, sizeof (uint64_t));
1284 }
1285 else
1286#endif
1287 /* win32 people keep sending patches that change this write() to send() */
1288 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1289 /* so when you think this write should be a send instead, please find out */
1290 /* where your send() is from - it's definitely not the microsoft send, and */
1291 /* tell me. thank you. */
1292 write (evpipe [1], &dummy, 1);
1293 2253
1294 errno = old_errno; 2254 errno = old_errno;
1295 } 2255 }
1296} 2256}
1297 2257
… …
1300static void 2260static void
1301pipecb (EV_P_ ev_io *iow, int revents) 2261pipecb (EV_P_ ev_io *iow, int revents)
1302{ 2262{
1303 int i; 2263 int i;
1304 2264
2265 if (revents & EV_READ)
2266 {
1305#if EV_USE_EVENTFD 2267#if EV_USE_EVENTFD
1306 if (evfd >= 0) 2268 if (evpipe [0] < 0)
1307 { 2269 {
1308 uint64_t counter; 2270 uint64_t counter;
1309 read (evfd, &counter, sizeof (uint64_t)); 2271 read (evpipe [1], &counter, sizeof (uint64_t));
1310 } 2272 }
1311 else 2273 else
1312#endif 2274#endif
1313 { 2275 {
1314 char dummy; 2276 char dummy[4];
1315 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2277#ifdef _WIN32
2278 WSABUF buf;
2279 DWORD recvd;
2280 DWORD flags = 0;
2281 buf.buf = dummy;
2282 buf.len = sizeof (dummy);
2283 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2284#else
1316 read (evpipe [0], &dummy, 1); 2285 read (evpipe [0], &dummy, sizeof (dummy));
2286#endif
2287 }
1317 } 2288 }
1318 2289
2290 pipe_write_skipped = 0;
2291
2292 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2293
2294#if EV_SIGNAL_ENABLE
1319 if (sig_pending) 2295 if (sig_pending)
1320 { 2296 {
1321 sig_pending = 0; 2297 sig_pending = 0;
2298
2299 ECB_MEMORY_FENCE;
1322 2300
1323 for (i = EV_NSIG - 1; i--; ) 2301 for (i = EV_NSIG - 1; i--; )
1324 if (expect_false (signals [i].pending)) 2302 if (expect_false (signals [i].pending))
1325 ev_feed_signal_event (EV_A_ i + 1); 2303 ev_feed_signal_event (EV_A_ i + 1);
1326 } 2304 }
2305#endif
1327 2306
1328#if EV_ASYNC_ENABLE 2307#if EV_ASYNC_ENABLE
1329 if (async_pending) 2308 if (async_pending)
1330 { 2309 {
1331 async_pending = 0; 2310 async_pending = 0;
2311
2312 ECB_MEMORY_FENCE;
1332 2313
1333 for (i = asynccnt; i--; ) 2314 for (i = asynccnt; i--; )
1334 if (asyncs [i]->sent) 2315 if (asyncs [i]->sent)
1335 { 2316 {
1336 asyncs [i]->sent = 0; 2317 asyncs [i]->sent = 0;
2318 ECB_MEMORY_FENCE_RELEASE;
1337 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2319 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1338 } 2320 }
1339 } 2321 }
1340#endif 2322#endif
1341} 2323}
1342 2324
1343/*****************************************************************************/ 2325/*****************************************************************************/
1344 2326
2327void
2328ev_feed_signal (int signum) EV_THROW
2329{
2330#if EV_MULTIPLICITY
2331 EV_P;
2332 ECB_MEMORY_FENCE_ACQUIRE;
2333 EV_A = signals [signum - 1].loop;
2334
2335 if (!EV_A)
2336 return;
2337#endif
2338
2339 signals [signum - 1].pending = 1;
2340 evpipe_write (EV_A_ &sig_pending);
2341}
2342
1345static void 2343static void
1346ev_sighandler (int signum) 2344ev_sighandler (int signum)
1347{ 2345{
1348#if EV_MULTIPLICITY
1349 EV_P = signals [signum - 1].loop;
1350#endif
1351
1352#ifdef _WIN32 2346#ifdef _WIN32
1353 signal (signum, ev_sighandler); 2347 signal (signum, ev_sighandler);
1354#endif 2348#endif
1355 2349
1356 signals [signum - 1].pending = 1; 2350 ev_feed_signal (signum);
1357 evpipe_write (EV_A_ &sig_pending);
1358} 2351}
1359 2352
1360void noinline 2353void noinline
1361ev_feed_signal_event (EV_P_ int signum) 2354ev_feed_signal_event (EV_P_ int signum) EV_THROW
1362{ 2355{
1363 WL w; 2356 WL w;
1364 2357
1365 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2358 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1366 return; 2359 return;
1367 2360
1368 --signum; 2361 --signum;
1369 2362
1370#if EV_MULTIPLICITY 2363#if EV_MULTIPLICITY
… …
1374 if (expect_false (signals [signum].loop != EV_A)) 2367 if (expect_false (signals [signum].loop != EV_A))
1375 return; 2368 return;
1376#endif 2369#endif
1377 2370
1378 signals [signum].pending = 0; 2371 signals [signum].pending = 0;
2372 ECB_MEMORY_FENCE_RELEASE;
1379 2373
1380 for (w = signals [signum].head; w; w = w->next) 2374 for (w = signals [signum].head; w; w = w->next)
1381 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2375 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1382} 2376}
1383 2377
… …
1462 2456
1463#endif 2457#endif
1464 2458
1465/*****************************************************************************/ 2459/*****************************************************************************/
1466 2460
2461#if EV_USE_IOCP
2462# include "ev_iocp.c"
2463#endif
1467#if EV_USE_PORT 2464#if EV_USE_PORT
1468# include "ev_port.c" 2465# include "ev_port.c"
1469#endif 2466#endif
1470#if EV_USE_KQUEUE 2467#if EV_USE_KQUEUE
1471# include "ev_kqueue.c" 2468# include "ev_kqueue.c"
… …
1478#endif 2475#endif
1479#if EV_USE_SELECT 2476#if EV_USE_SELECT
1480# include "ev_select.c" 2477# include "ev_select.c"
1481#endif 2478#endif
1482 2479
1483int 2480int ecb_cold
1484ev_version_major (void) 2481ev_version_major (void) EV_THROW
1485{ 2482{
1486 return EV_VERSION_MAJOR; 2483 return EV_VERSION_MAJOR;
1487} 2484}
1488 2485
1489int 2486int ecb_cold
1490ev_version_minor (void) 2487ev_version_minor (void) EV_THROW
1491{ 2488{
1492 return EV_VERSION_MINOR; 2489 return EV_VERSION_MINOR;
1493} 2490}
1494 2491
1495/* return true if we are running with elevated privileges and should ignore env variables */ 2492/* return true if we are running with elevated privileges and should ignore env variables */
1496int inline_size 2493int inline_size ecb_cold
1497enable_secure (void) 2494enable_secure (void)
1498{ 2495{
1499#ifdef _WIN32 2496#ifdef _WIN32
1500 return 0; 2497 return 0;
1501#else 2498#else
1502 return getuid () != geteuid () 2499 return getuid () != geteuid ()
1503 || getgid () != getegid (); 2500 || getgid () != getegid ();
1504#endif 2501#endif
1505} 2502}
1506 2503
1507unsigned int 2504unsigned int ecb_cold
1508ev_supported_backends (void) 2505ev_supported_backends (void) EV_THROW
1509{ 2506{
1510 unsigned int flags = 0; 2507 unsigned int flags = 0;
1511 2508
1512 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2509 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1513 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2510 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1516 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2513 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1517 2514
1518 return flags; 2515 return flags;
1519} 2516}
1520 2517
1521unsigned int 2518unsigned int ecb_cold
1522ev_recommended_backends (void) 2519ev_recommended_backends (void) EV_THROW
1523{ 2520{
1524 unsigned int flags = ev_supported_backends (); 2521 unsigned int flags = ev_supported_backends ();
1525 2522
1526#ifndef __NetBSD__ 2523#ifndef __NetBSD__
1527 /* kqueue is borked on everything but netbsd apparently */ 2524 /* kqueue is borked on everything but netbsd apparently */
… …
1538#endif 2535#endif
1539 2536
1540 return flags; 2537 return flags;
1541} 2538}
1542 2539
2540unsigned int ecb_cold
2541ev_embeddable_backends (void) EV_THROW
2542{
2543 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2544
2545 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2546 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2547 flags &= ~EVBACKEND_EPOLL;
2548
2549 return flags;
2550}
2551
1543unsigned int 2552unsigned int
1544ev_embeddable_backends (void)
1545{
1546 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1547
1548 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1549 /* please fix it and tell me how to detect the fix */
1550 flags &= ~EVBACKEND_EPOLL;
1551
1552 return flags;
1553}
1554
1555unsigned int
1556ev_backend (EV_P) 2553ev_backend (EV_P) EV_THROW
1557{ 2554{
1558 return backend; 2555 return backend;
1559} 2556}
1560 2557
1561#if EV_FEATURE_API 2558#if EV_FEATURE_API
1562unsigned int 2559unsigned int
1563ev_iteration (EV_P) 2560ev_iteration (EV_P) EV_THROW
1564{ 2561{
1565 return loop_count; 2562 return loop_count;
1566} 2563}
1567 2564
1568unsigned int 2565unsigned int
1569ev_depth (EV_P) 2566ev_depth (EV_P) EV_THROW
1570{ 2567{
1571 return loop_depth; 2568 return loop_depth;
1572} 2569}
1573 2570
1574void 2571void
1575ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2572ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1576{ 2573{
1577 io_blocktime = interval; 2574 io_blocktime = interval;
1578} 2575}
1579 2576
1580void 2577void
1581ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2578ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1582{ 2579{
1583 timeout_blocktime = interval; 2580 timeout_blocktime = interval;
1584} 2581}
1585 2582
1586void 2583void
1587ev_set_userdata (EV_P_ void *data) 2584ev_set_userdata (EV_P_ void *data) EV_THROW
1588{ 2585{
1589 userdata = data; 2586 userdata = data;
1590} 2587}
1591 2588
1592void * 2589void *
1593ev_userdata (EV_P) 2590ev_userdata (EV_P) EV_THROW
1594{ 2591{
1595 return userdata; 2592 return userdata;
1596} 2593}
1597 2594
2595void
1598void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2596ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
1599{ 2597{
1600 invoke_cb = invoke_pending_cb; 2598 invoke_cb = invoke_pending_cb;
1601} 2599}
1602 2600
1603void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2601void
2602ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
1604{ 2603{
1605 release_cb = release; 2604 release_cb = release;
1606 acquire_cb = acquire; 2605 acquire_cb = acquire;
1607} 2606}
1608#endif 2607#endif
1609 2608
1610/* initialise a loop structure, must be zero-initialised */ 2609/* initialise a loop structure, must be zero-initialised */
1611static void noinline 2610static void noinline ecb_cold
1612loop_init (EV_P_ unsigned int flags) 2611loop_init (EV_P_ unsigned int flags) EV_THROW
1613{ 2612{
1614 if (!backend) 2613 if (!backend)
1615 { 2614 {
2615 origflags = flags;
2616
1616#if EV_USE_REALTIME 2617#if EV_USE_REALTIME
1617 if (!have_realtime) 2618 if (!have_realtime)
1618 { 2619 {
1619 struct timespec ts; 2620 struct timespec ts;
1620 2621
… …
1642 if (!(flags & EVFLAG_NOENV) 2643 if (!(flags & EVFLAG_NOENV)
1643 && !enable_secure () 2644 && !enable_secure ()
1644 && getenv ("LIBEV_FLAGS")) 2645 && getenv ("LIBEV_FLAGS"))
1645 flags = atoi (getenv ("LIBEV_FLAGS")); 2646 flags = atoi (getenv ("LIBEV_FLAGS"));
1646 2647
1647 ev_rt_now = ev_time (); 2648 ev_rt_now = ev_time ();
1648 mn_now = get_clock (); 2649 mn_now = get_clock ();
1649 now_floor = mn_now; 2650 now_floor = mn_now;
1650 rtmn_diff = ev_rt_now - mn_now; 2651 rtmn_diff = ev_rt_now - mn_now;
1651#if EV_FEATURE_API 2652#if EV_FEATURE_API
1652 invoke_cb = ev_invoke_pending; 2653 invoke_cb = ev_invoke_pending;
1653#endif 2654#endif
1654 2655
1655 io_blocktime = 0.; 2656 io_blocktime = 0.;
1656 timeout_blocktime = 0.; 2657 timeout_blocktime = 0.;
1657 backend = 0; 2658 backend = 0;
1658 backend_fd = -1; 2659 backend_fd = -1;
1659 sig_pending = 0; 2660 sig_pending = 0;
1660#if EV_ASYNC_ENABLE 2661#if EV_ASYNC_ENABLE
1661 async_pending = 0; 2662 async_pending = 0;
1662#endif 2663#endif
2664 pipe_write_skipped = 0;
2665 pipe_write_wanted = 0;
2666 evpipe [0] = -1;
2667 evpipe [1] = -1;
1663#if EV_USE_INOTIFY 2668#if EV_USE_INOTIFY
1664 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2669 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1665#endif 2670#endif
1666#if EV_USE_SIGNALFD 2671#if EV_USE_SIGNALFD
1667 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2672 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1668#endif 2673#endif
1669 2674
1670 if (!(flags & 0x0000ffffU)) 2675 if (!(flags & EVBACKEND_MASK))
1671 flags |= ev_recommended_backends (); 2676 flags |= ev_recommended_backends ();
1672 2677
2678#if EV_USE_IOCP
2679 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2680#endif
1673#if EV_USE_PORT 2681#if EV_USE_PORT
1674 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2682 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1675#endif 2683#endif
1676#if EV_USE_KQUEUE 2684#if EV_USE_KQUEUE
1677 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2685 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1694#endif 2702#endif
1695 } 2703 }
1696} 2704}
1697 2705
1698/* free up a loop structure */ 2706/* free up a loop structure */
1699static void noinline 2707void ecb_cold
1700loop_destroy (EV_P) 2708ev_loop_destroy (EV_P)
1701{ 2709{
1702 int i; 2710 int i;
2711
2712#if EV_MULTIPLICITY
2713 /* mimic free (0) */
2714 if (!EV_A)
2715 return;
2716#endif
2717
2718#if EV_CLEANUP_ENABLE
2719 /* queue cleanup watchers (and execute them) */
2720 if (expect_false (cleanupcnt))
2721 {
2722 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2723 EV_INVOKE_PENDING;
2724 }
2725#endif
2726
2727#if EV_CHILD_ENABLE
2728 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2729 {
2730 ev_ref (EV_A); /* child watcher */
2731 ev_signal_stop (EV_A_ &childev);
2732 }
2733#endif
1703 2734
1704 if (ev_is_active (&pipe_w)) 2735 if (ev_is_active (&pipe_w))
1705 { 2736 {
1706 /*ev_ref (EV_A);*/ 2737 /*ev_ref (EV_A);*/
1707 /*ev_io_stop (EV_A_ &pipe_w);*/ 2738 /*ev_io_stop (EV_A_ &pipe_w);*/
1708 2739
1709#if EV_USE_EVENTFD
1710 if (evfd >= 0)
1711 close (evfd);
1712#endif
1713
1714 if (evpipe [0] >= 0)
1715 {
1716 EV_WIN32_CLOSE_FD (evpipe [0]); 2740 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1717 EV_WIN32_CLOSE_FD (evpipe [1]); 2741 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1718 }
1719 } 2742 }
1720 2743
1721#if EV_USE_SIGNALFD 2744#if EV_USE_SIGNALFD
1722 if (ev_is_active (&sigfd_w)) 2745 if (ev_is_active (&sigfd_w))
1723 close (sigfd); 2746 close (sigfd);
… …
1729#endif 2752#endif
1730 2753
1731 if (backend_fd >= 0) 2754 if (backend_fd >= 0)
1732 close (backend_fd); 2755 close (backend_fd);
1733 2756
2757#if EV_USE_IOCP
2758 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2759#endif
1734#if EV_USE_PORT 2760#if EV_USE_PORT
1735 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2761 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1736#endif 2762#endif
1737#if EV_USE_KQUEUE 2763#if EV_USE_KQUEUE
1738 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2764 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1765 array_free (periodic, EMPTY); 2791 array_free (periodic, EMPTY);
1766#endif 2792#endif
1767#if EV_FORK_ENABLE 2793#if EV_FORK_ENABLE
1768 array_free (fork, EMPTY); 2794 array_free (fork, EMPTY);
1769#endif 2795#endif
2796#if EV_CLEANUP_ENABLE
2797 array_free (cleanup, EMPTY);
2798#endif
1770 array_free (prepare, EMPTY); 2799 array_free (prepare, EMPTY);
1771 array_free (check, EMPTY); 2800 array_free (check, EMPTY);
1772#if EV_ASYNC_ENABLE 2801#if EV_ASYNC_ENABLE
1773 array_free (async, EMPTY); 2802 array_free (async, EMPTY);
1774#endif 2803#endif
1775 2804
1776 backend = 0; 2805 backend = 0;
2806
2807#if EV_MULTIPLICITY
2808 if (ev_is_default_loop (EV_A))
2809#endif
2810 ev_default_loop_ptr = 0;
2811#if EV_MULTIPLICITY
2812 else
2813 ev_free (EV_A);
2814#endif
1777} 2815}
1778 2816
1779#if EV_USE_INOTIFY 2817#if EV_USE_INOTIFY
1780inline_size void infy_fork (EV_P); 2818inline_size void infy_fork (EV_P);
1781#endif 2819#endif
… …
1794#endif 2832#endif
1795#if EV_USE_INOTIFY 2833#if EV_USE_INOTIFY
1796 infy_fork (EV_A); 2834 infy_fork (EV_A);
1797#endif 2835#endif
1798 2836
2837#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1799 if (ev_is_active (&pipe_w)) 2838 if (ev_is_active (&pipe_w))
1800 { 2839 {
1801 /* this "locks" the handlers against writing to the pipe */ 2840 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1802 /* while we modify the fd vars */
1803 sig_pending = 1;
1804#if EV_ASYNC_ENABLE
1805 async_pending = 1;
1806#endif
1807 2841
1808 ev_ref (EV_A); 2842 ev_ref (EV_A);
1809 ev_io_stop (EV_A_ &pipe_w); 2843 ev_io_stop (EV_A_ &pipe_w);
1810 2844
1811#if EV_USE_EVENTFD
1812 if (evfd >= 0)
1813 close (evfd);
1814#endif
1815
1816 if (evpipe [0] >= 0) 2845 if (evpipe [0] >= 0)
1817 {
1818 EV_WIN32_CLOSE_FD (evpipe [0]); 2846 EV_WIN32_CLOSE_FD (evpipe [0]);
1819 EV_WIN32_CLOSE_FD (evpipe [1]);
1820 }
1821 2847
1822#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1823 evpipe_init (EV_A); 2848 evpipe_init (EV_A);
1824 /* now iterate over everything, in case we missed something */ 2849 /* iterate over everything, in case we missed something before */
1825 pipecb (EV_A_ &pipe_w, EV_READ); 2850 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1826#endif
1827 } 2851 }
2852#endif
1828 2853
1829 postfork = 0; 2854 postfork = 0;
1830} 2855}
1831 2856
1832#if EV_MULTIPLICITY 2857#if EV_MULTIPLICITY
1833 2858
1834struct ev_loop * 2859struct ev_loop * ecb_cold
1835ev_loop_new (unsigned int flags) 2860ev_loop_new (unsigned int flags) EV_THROW
1836{ 2861{
1837 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2862 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1838 2863
1839 memset (EV_A, 0, sizeof (struct ev_loop)); 2864 memset (EV_A, 0, sizeof (struct ev_loop));
1840 loop_init (EV_A_ flags); 2865 loop_init (EV_A_ flags);
1841 2866
1842 if (ev_backend (EV_A)) 2867 if (ev_backend (EV_A))
1843 return EV_A; 2868 return EV_A;
1844 2869
2870 ev_free (EV_A);
1845 return 0; 2871 return 0;
1846} 2872}
1847 2873
1848void
1849ev_loop_destroy (EV_P)
1850{
1851 loop_destroy (EV_A);
1852 ev_free (loop);
1853}
1854
1855void
1856ev_loop_fork (EV_P)
1857{
1858 postfork = 1; /* must be in line with ev_default_fork */
1859}
1860#endif /* multiplicity */ 2874#endif /* multiplicity */
1861 2875
1862#if EV_VERIFY 2876#if EV_VERIFY
1863static void noinline 2877static void noinline ecb_cold
1864verify_watcher (EV_P_ W w) 2878verify_watcher (EV_P_ W w)
1865{ 2879{
1866 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2880 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1867 2881
1868 if (w->pending) 2882 if (w->pending)
1869 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2883 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1870} 2884}
1871 2885
1872static void noinline 2886static void noinline ecb_cold
1873verify_heap (EV_P_ ANHE *heap, int N) 2887verify_heap (EV_P_ ANHE *heap, int N)
1874{ 2888{
1875 int i; 2889 int i;
1876 2890
1877 for (i = HEAP0; i < N + HEAP0; ++i) 2891 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1882 2896
1883 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2897 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1884 } 2898 }
1885} 2899}
1886 2900
1887static void noinline 2901static void noinline ecb_cold
1888array_verify (EV_P_ W *ws, int cnt) 2902array_verify (EV_P_ W *ws, int cnt)
1889{ 2903{
1890 while (cnt--) 2904 while (cnt--)
1891 { 2905 {
1892 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2906 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1894 } 2908 }
1895} 2909}
1896#endif 2910#endif
1897 2911
1898#if EV_FEATURE_API 2912#if EV_FEATURE_API
1899void 2913void ecb_cold
1900ev_verify (EV_P) 2914ev_verify (EV_P) EV_THROW
1901{ 2915{
1902#if EV_VERIFY 2916#if EV_VERIFY
1903 int i; 2917 int i;
1904 WL w; 2918 WL w, w2;
1905 2919
1906 assert (activecnt >= -1); 2920 assert (activecnt >= -1);
1907 2921
1908 assert (fdchangemax >= fdchangecnt); 2922 assert (fdchangemax >= fdchangecnt);
1909 for (i = 0; i < fdchangecnt; ++i) 2923 for (i = 0; i < fdchangecnt; ++i)
1910 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2924 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1911 2925
1912 assert (anfdmax >= 0); 2926 assert (anfdmax >= 0);
1913 for (i = 0; i < anfdmax; ++i) 2927 for (i = 0; i < anfdmax; ++i)
2928 {
2929 int j = 0;
2930
1914 for (w = anfds [i].head; w; w = w->next) 2931 for (w = w2 = anfds [i].head; w; w = w->next)
1915 { 2932 {
1916 verify_watcher (EV_A_ (W)w); 2933 verify_watcher (EV_A_ (W)w);
2934
2935 if (j++ & 1)
2936 {
2937 assert (("libev: io watcher list contains a loop", w != w2));
2938 w2 = w2->next;
2939 }
2940
1917 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2941 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1918 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2942 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1919 } 2943 }
2944 }
1920 2945
1921 assert (timermax >= timercnt); 2946 assert (timermax >= timercnt);
1922 verify_heap (EV_A_ timers, timercnt); 2947 verify_heap (EV_A_ timers, timercnt);
1923 2948
1924#if EV_PERIODIC_ENABLE 2949#if EV_PERIODIC_ENABLE
… …
1939#if EV_FORK_ENABLE 2964#if EV_FORK_ENABLE
1940 assert (forkmax >= forkcnt); 2965 assert (forkmax >= forkcnt);
1941 array_verify (EV_A_ (W *)forks, forkcnt); 2966 array_verify (EV_A_ (W *)forks, forkcnt);
1942#endif 2967#endif
1943 2968
2969#if EV_CLEANUP_ENABLE
2970 assert (cleanupmax >= cleanupcnt);
2971 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2972#endif
2973
1944#if EV_ASYNC_ENABLE 2974#if EV_ASYNC_ENABLE
1945 assert (asyncmax >= asynccnt); 2975 assert (asyncmax >= asynccnt);
1946 array_verify (EV_A_ (W *)asyncs, asynccnt); 2976 array_verify (EV_A_ (W *)asyncs, asynccnt);
1947#endif 2977#endif
1948 2978
… …
1965#endif 2995#endif
1966} 2996}
1967#endif 2997#endif
1968 2998
1969#if EV_MULTIPLICITY 2999#if EV_MULTIPLICITY
1970struct ev_loop * 3000struct ev_loop * ecb_cold
1971ev_default_loop_init (unsigned int flags)
1972#else 3001#else
1973int 3002int
3003#endif
1974ev_default_loop (unsigned int flags) 3004ev_default_loop (unsigned int flags) EV_THROW
1975#endif
1976{ 3005{
1977 if (!ev_default_loop_ptr) 3006 if (!ev_default_loop_ptr)
1978 { 3007 {
1979#if EV_MULTIPLICITY 3008#if EV_MULTIPLICITY
1980 EV_P = ev_default_loop_ptr = &default_loop_struct; 3009 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1999 3028
2000 return ev_default_loop_ptr; 3029 return ev_default_loop_ptr;
2001} 3030}
2002 3031
2003void 3032void
2004ev_default_destroy (void) 3033ev_loop_fork (EV_P) EV_THROW
2005{ 3034{
2006#if EV_MULTIPLICITY 3035 postfork = 1;
2007 EV_P = ev_default_loop_ptr;
2008#endif
2009
2010 ev_default_loop_ptr = 0;
2011
2012#if EV_CHILD_ENABLE
2013 ev_ref (EV_A); /* child watcher */
2014 ev_signal_stop (EV_A_ &childev);
2015#endif
2016
2017 loop_destroy (EV_A);
2018}
2019
2020void
2021ev_default_fork (void)
2022{
2023#if EV_MULTIPLICITY
2024 EV_P = ev_default_loop_ptr;
2025#endif
2026
2027 postfork = 1; /* must be in line with ev_loop_fork */
2028} 3036}
2029 3037
2030/*****************************************************************************/ 3038/*****************************************************************************/
2031 3039
2032void 3040void
… …
2034{ 3042{
2035 EV_CB_INVOKE ((W)w, revents); 3043 EV_CB_INVOKE ((W)w, revents);
2036} 3044}
2037 3045
2038unsigned int 3046unsigned int
2039ev_pending_count (EV_P) 3047ev_pending_count (EV_P) EV_THROW
2040{ 3048{
2041 int pri; 3049 int pri;
2042 unsigned int count = 0; 3050 unsigned int count = 0;
2043 3051
2044 for (pri = NUMPRI; pri--; ) 3052 for (pri = NUMPRI; pri--; )
… …
2048} 3056}
2049 3057
2050void noinline 3058void noinline
2051ev_invoke_pending (EV_P) 3059ev_invoke_pending (EV_P)
2052{ 3060{
2053 int pri; 3061 pendingpri = NUMPRI;
2054 3062
2055 for (pri = NUMPRI; pri--; ) 3063 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3064 {
3065 --pendingpri;
3066
2056 while (pendingcnt [pri]) 3067 while (pendingcnt [pendingpri])
2057 { 3068 {
2058 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3069 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2059 3070
2060 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2061 /* ^ this is no longer true, as pending_w could be here */
2062
2063 p->w->pending = 0; 3071 p->w->pending = 0;
2064 EV_CB_INVOKE (p->w, p->events); 3072 EV_CB_INVOKE (p->w, p->events);
2065 EV_FREQUENT_CHECK; 3073 EV_FREQUENT_CHECK;
2066 } 3074 }
3075 }
2067} 3076}
2068 3077
2069#if EV_IDLE_ENABLE 3078#if EV_IDLE_ENABLE
2070/* make idle watchers pending. this handles the "call-idle */ 3079/* make idle watchers pending. this handles the "call-idle */
2071/* only when higher priorities are idle" logic */ 3080/* only when higher priorities are idle" logic */
… …
2128 feed_reverse_done (EV_A_ EV_TIMER); 3137 feed_reverse_done (EV_A_ EV_TIMER);
2129 } 3138 }
2130} 3139}
2131 3140
2132#if EV_PERIODIC_ENABLE 3141#if EV_PERIODIC_ENABLE
3142
3143static void noinline
3144periodic_recalc (EV_P_ ev_periodic *w)
3145{
3146 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3147 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3148
3149 /* the above almost always errs on the low side */
3150 while (at <= ev_rt_now)
3151 {
3152 ev_tstamp nat = at + w->interval;
3153
3154 /* when resolution fails us, we use ev_rt_now */
3155 if (expect_false (nat == at))
3156 {
3157 at = ev_rt_now;
3158 break;
3159 }
3160
3161 at = nat;
3162 }
3163
3164 ev_at (w) = at;
3165}
3166
2133/* make periodics pending */ 3167/* make periodics pending */
2134inline_size void 3168inline_size void
2135periodics_reify (EV_P) 3169periodics_reify (EV_P)
2136{ 3170{
2137 EV_FREQUENT_CHECK; 3171 EV_FREQUENT_CHECK;
2138 3172
2139 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3173 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2140 { 3174 {
2141 int feed_count = 0;
2142
2143 do 3175 do
2144 { 3176 {
2145 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3177 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2146 3178
2147 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3179 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2156 ANHE_at_cache (periodics [HEAP0]); 3188 ANHE_at_cache (periodics [HEAP0]);
2157 downheap (periodics, periodiccnt, HEAP0); 3189 downheap (periodics, periodiccnt, HEAP0);
2158 } 3190 }
2159 else if (w->interval) 3191 else if (w->interval)
2160 { 3192 {
2161 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3193 periodic_recalc (EV_A_ w);
2162 /* if next trigger time is not sufficiently in the future, put it there */
2163 /* this might happen because of floating point inexactness */
2164 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2165 {
2166 ev_at (w) += w->interval;
2167
2168 /* if interval is unreasonably low we might still have a time in the past */
2169 /* so correct this. this will make the periodic very inexact, but the user */
2170 /* has effectively asked to get triggered more often than possible */
2171 if (ev_at (w) < ev_rt_now)
2172 ev_at (w) = ev_rt_now;
2173 }
2174
2175 ANHE_at_cache (periodics [HEAP0]); 3194 ANHE_at_cache (periodics [HEAP0]);
2176 downheap (periodics, periodiccnt, HEAP0); 3195 downheap (periodics, periodiccnt, HEAP0);
2177 } 3196 }
2178 else 3197 else
2179 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3198 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2187 } 3206 }
2188} 3207}
2189 3208
2190/* simply recalculate all periodics */ 3209/* simply recalculate all periodics */
2191/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3210/* TODO: maybe ensure that at least one event happens when jumping forward? */
2192static void noinline 3211static void noinline ecb_cold
2193periodics_reschedule (EV_P) 3212periodics_reschedule (EV_P)
2194{ 3213{
2195 int i; 3214 int i;
2196 3215
2197 /* adjust periodics after time jump */ 3216 /* adjust periodics after time jump */
… …
2200 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3219 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2201 3220
2202 if (w->reschedule_cb) 3221 if (w->reschedule_cb)
2203 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3222 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2204 else if (w->interval) 3223 else if (w->interval)
2205 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3224 periodic_recalc (EV_A_ w);
2206 3225
2207 ANHE_at_cache (periodics [i]); 3226 ANHE_at_cache (periodics [i]);
2208 } 3227 }
2209 3228
2210 reheap (periodics, periodiccnt); 3229 reheap (periodics, periodiccnt);
2211} 3230}
2212#endif 3231#endif
2213 3232
2214/* adjust all timers by a given offset */ 3233/* adjust all timers by a given offset */
2215static void noinline 3234static void noinline ecb_cold
2216timers_reschedule (EV_P_ ev_tstamp adjust) 3235timers_reschedule (EV_P_ ev_tstamp adjust)
2217{ 3236{
2218 int i; 3237 int i;
2219 3238
2220 for (i = 0; i < timercnt; ++i) 3239 for (i = 0; i < timercnt; ++i)
… …
2257 * doesn't hurt either as we only do this on time-jumps or 3276 * doesn't hurt either as we only do this on time-jumps or
2258 * in the unlikely event of having been preempted here. 3277 * in the unlikely event of having been preempted here.
2259 */ 3278 */
2260 for (i = 4; --i; ) 3279 for (i = 4; --i; )
2261 { 3280 {
3281 ev_tstamp diff;
2262 rtmn_diff = ev_rt_now - mn_now; 3282 rtmn_diff = ev_rt_now - mn_now;
2263 3283
3284 diff = odiff - rtmn_diff;
3285
2264 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3286 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2265 return; /* all is well */ 3287 return; /* all is well */
2266 3288
2267 ev_rt_now = ev_time (); 3289 ev_rt_now = ev_time ();
2268 mn_now = get_clock (); 3290 mn_now = get_clock ();
2269 now_floor = mn_now; 3291 now_floor = mn_now;
… …
2291 3313
2292 mn_now = ev_rt_now; 3314 mn_now = ev_rt_now;
2293 } 3315 }
2294} 3316}
2295 3317
2296void 3318int
2297ev_loop (EV_P_ int flags) 3319ev_run (EV_P_ int flags)
2298{ 3320{
2299#if EV_FEATURE_API 3321#if EV_FEATURE_API
2300 ++loop_depth; 3322 ++loop_depth;
2301#endif 3323#endif
2302 3324
2303 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 3325 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2304 3326
2305 loop_done = EVUNLOOP_CANCEL; 3327 loop_done = EVBREAK_CANCEL;
2306 3328
2307 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 3329 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2308 3330
2309 do 3331 do
2310 { 3332 {
… …
2353 /* calculate blocking time */ 3375 /* calculate blocking time */
2354 { 3376 {
2355 ev_tstamp waittime = 0.; 3377 ev_tstamp waittime = 0.;
2356 ev_tstamp sleeptime = 0.; 3378 ev_tstamp sleeptime = 0.;
2357 3379
3380 /* remember old timestamp for io_blocktime calculation */
3381 ev_tstamp prev_mn_now = mn_now;
3382
3383 /* update time to cancel out callback processing overhead */
3384 time_update (EV_A_ 1e100);
3385
3386 /* from now on, we want a pipe-wake-up */
3387 pipe_write_wanted = 1;
3388
3389 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3390
2358 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3391 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2359 { 3392 {
2360 /* remember old timestamp for io_blocktime calculation */
2361 ev_tstamp prev_mn_now = mn_now;
2362
2363 /* update time to cancel out callback processing overhead */
2364 time_update (EV_A_ 1e100);
2365
2366 waittime = MAX_BLOCKTIME; 3393 waittime = MAX_BLOCKTIME;
2367 3394
2368 if (timercnt) 3395 if (timercnt)
2369 { 3396 {
2370 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3397 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2371 if (waittime > to) waittime = to; 3398 if (waittime > to) waittime = to;
2372 } 3399 }
2373 3400
2374#if EV_PERIODIC_ENABLE 3401#if EV_PERIODIC_ENABLE
2375 if (periodiccnt) 3402 if (periodiccnt)
2376 { 3403 {
2377 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3404 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2378 if (waittime > to) waittime = to; 3405 if (waittime > to) waittime = to;
2379 } 3406 }
2380#endif 3407#endif
2381 3408
2382 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3409 /* don't let timeouts decrease the waittime below timeout_blocktime */
2383 if (expect_false (waittime < timeout_blocktime)) 3410 if (expect_false (waittime < timeout_blocktime))
2384 waittime = timeout_blocktime; 3411 waittime = timeout_blocktime;
3412
3413 /* at this point, we NEED to wait, so we have to ensure */
3414 /* to pass a minimum nonzero value to the backend */
3415 if (expect_false (waittime < backend_mintime))
3416 waittime = backend_mintime;
2385 3417
2386 /* extra check because io_blocktime is commonly 0 */ 3418 /* extra check because io_blocktime is commonly 0 */
2387 if (expect_false (io_blocktime)) 3419 if (expect_false (io_blocktime))
2388 { 3420 {
2389 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3421 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2390 3422
2391 if (sleeptime > waittime - backend_fudge) 3423 if (sleeptime > waittime - backend_mintime)
2392 sleeptime = waittime - backend_fudge; 3424 sleeptime = waittime - backend_mintime;
2393 3425
2394 if (expect_true (sleeptime > 0.)) 3426 if (expect_true (sleeptime > 0.))
2395 { 3427 {
2396 ev_sleep (sleeptime); 3428 ev_sleep (sleeptime);
2397 waittime -= sleeptime; 3429 waittime -= sleeptime;
… …
2400 } 3432 }
2401 3433
2402#if EV_FEATURE_API 3434#if EV_FEATURE_API
2403 ++loop_count; 3435 ++loop_count;
2404#endif 3436#endif
2405 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 3437 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2406 backend_poll (EV_A_ waittime); 3438 backend_poll (EV_A_ waittime);
2407 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 3439 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3440
3441 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3442
3443 ECB_MEMORY_FENCE_ACQUIRE;
3444 if (pipe_write_skipped)
3445 {
3446 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3447 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3448 }
3449
2408 3450
2409 /* update ev_rt_now, do magic */ 3451 /* update ev_rt_now, do magic */
2410 time_update (EV_A_ waittime + sleeptime); 3452 time_update (EV_A_ waittime + sleeptime);
2411 } 3453 }
2412 3454
… …
2430 EV_INVOKE_PENDING; 3472 EV_INVOKE_PENDING;
2431 } 3473 }
2432 while (expect_true ( 3474 while (expect_true (
2433 activecnt 3475 activecnt
2434 && !loop_done 3476 && !loop_done
2435 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3477 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2436 )); 3478 ));
2437 3479
2438 if (loop_done == EVUNLOOP_ONE) 3480 if (loop_done == EVBREAK_ONE)
2439 loop_done = EVUNLOOP_CANCEL; 3481 loop_done = EVBREAK_CANCEL;
2440 3482
2441#if EV_FEATURE_API 3483#if EV_FEATURE_API
2442 --loop_depth; 3484 --loop_depth;
2443#endif 3485#endif
3486
3487 return activecnt;
2444} 3488}
2445 3489
2446void 3490void
2447ev_unloop (EV_P_ int how) 3491ev_break (EV_P_ int how) EV_THROW
2448{ 3492{
2449 loop_done = how; 3493 loop_done = how;
2450} 3494}
2451 3495
2452void 3496void
2453ev_ref (EV_P) 3497ev_ref (EV_P) EV_THROW
2454{ 3498{
2455 ++activecnt; 3499 ++activecnt;
2456} 3500}
2457 3501
2458void 3502void
2459ev_unref (EV_P) 3503ev_unref (EV_P) EV_THROW
2460{ 3504{
2461 --activecnt; 3505 --activecnt;
2462} 3506}
2463 3507
2464void 3508void
2465ev_now_update (EV_P) 3509ev_now_update (EV_P) EV_THROW
2466{ 3510{
2467 time_update (EV_A_ 1e100); 3511 time_update (EV_A_ 1e100);
2468} 3512}
2469 3513
2470void 3514void
2471ev_suspend (EV_P) 3515ev_suspend (EV_P) EV_THROW
2472{ 3516{
2473 ev_now_update (EV_A); 3517 ev_now_update (EV_A);
2474} 3518}
2475 3519
2476void 3520void
2477ev_resume (EV_P) 3521ev_resume (EV_P) EV_THROW
2478{ 3522{
2479 ev_tstamp mn_prev = mn_now; 3523 ev_tstamp mn_prev = mn_now;
2480 3524
2481 ev_now_update (EV_A); 3525 ev_now_update (EV_A);
2482 timers_reschedule (EV_A_ mn_now - mn_prev); 3526 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2521 w->pending = 0; 3565 w->pending = 0;
2522 } 3566 }
2523} 3567}
2524 3568
2525int 3569int
2526ev_clear_pending (EV_P_ void *w) 3570ev_clear_pending (EV_P_ void *w) EV_THROW
2527{ 3571{
2528 W w_ = (W)w; 3572 W w_ = (W)w;
2529 int pending = w_->pending; 3573 int pending = w_->pending;
2530 3574
2531 if (expect_true (pending)) 3575 if (expect_true (pending))
… …
2564} 3608}
2565 3609
2566/*****************************************************************************/ 3610/*****************************************************************************/
2567 3611
2568void noinline 3612void noinline
2569ev_io_start (EV_P_ ev_io *w) 3613ev_io_start (EV_P_ ev_io *w) EV_THROW
2570{ 3614{
2571 int fd = w->fd; 3615 int fd = w->fd;
2572 3616
2573 if (expect_false (ev_is_active (w))) 3617 if (expect_false (ev_is_active (w)))
2574 return; 3618 return;
… …
2580 3624
2581 ev_start (EV_A_ (W)w, 1); 3625 ev_start (EV_A_ (W)w, 1);
2582 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3626 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2583 wlist_add (&anfds[fd].head, (WL)w); 3627 wlist_add (&anfds[fd].head, (WL)w);
2584 3628
3629 /* common bug, apparently */
3630 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3631
2585 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3632 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2586 w->events &= ~EV__IOFDSET; 3633 w->events &= ~EV__IOFDSET;
2587 3634
2588 EV_FREQUENT_CHECK; 3635 EV_FREQUENT_CHECK;
2589} 3636}
2590 3637
2591void noinline 3638void noinline
2592ev_io_stop (EV_P_ ev_io *w) 3639ev_io_stop (EV_P_ ev_io *w) EV_THROW
2593{ 3640{
2594 clear_pending (EV_A_ (W)w); 3641 clear_pending (EV_A_ (W)w);
2595 if (expect_false (!ev_is_active (w))) 3642 if (expect_false (!ev_is_active (w)))
2596 return; 3643 return;
2597 3644
… …
2606 3653
2607 EV_FREQUENT_CHECK; 3654 EV_FREQUENT_CHECK;
2608} 3655}
2609 3656
2610void noinline 3657void noinline
2611ev_timer_start (EV_P_ ev_timer *w) 3658ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2612{ 3659{
2613 if (expect_false (ev_is_active (w))) 3660 if (expect_false (ev_is_active (w)))
2614 return; 3661 return;
2615 3662
2616 ev_at (w) += mn_now; 3663 ev_at (w) += mn_now;
… …
2630 3677
2631 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3678 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2632} 3679}
2633 3680
2634void noinline 3681void noinline
2635ev_timer_stop (EV_P_ ev_timer *w) 3682ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2636{ 3683{
2637 clear_pending (EV_A_ (W)w); 3684 clear_pending (EV_A_ (W)w);
2638 if (expect_false (!ev_is_active (w))) 3685 if (expect_false (!ev_is_active (w)))
2639 return; 3686 return;
2640 3687
… …
2660 3707
2661 EV_FREQUENT_CHECK; 3708 EV_FREQUENT_CHECK;
2662} 3709}
2663 3710
2664void noinline 3711void noinline
2665ev_timer_again (EV_P_ ev_timer *w) 3712ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2666{ 3713{
2667 EV_FREQUENT_CHECK; 3714 EV_FREQUENT_CHECK;
3715
3716 clear_pending (EV_A_ (W)w);
2668 3717
2669 if (ev_is_active (w)) 3718 if (ev_is_active (w))
2670 { 3719 {
2671 if (w->repeat) 3720 if (w->repeat)
2672 { 3721 {
… …
2685 3734
2686 EV_FREQUENT_CHECK; 3735 EV_FREQUENT_CHECK;
2687} 3736}
2688 3737
2689ev_tstamp 3738ev_tstamp
2690ev_timer_remaining (EV_P_ ev_timer *w) 3739ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2691{ 3740{
2692 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3741 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2693} 3742}
2694 3743
2695#if EV_PERIODIC_ENABLE 3744#if EV_PERIODIC_ENABLE
2696void noinline 3745void noinline
2697ev_periodic_start (EV_P_ ev_periodic *w) 3746ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2698{ 3747{
2699 if (expect_false (ev_is_active (w))) 3748 if (expect_false (ev_is_active (w)))
2700 return; 3749 return;
2701 3750
2702 if (w->reschedule_cb) 3751 if (w->reschedule_cb)
2703 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3752 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2704 else if (w->interval) 3753 else if (w->interval)
2705 { 3754 {
2706 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3755 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2707 /* this formula differs from the one in periodic_reify because we do not always round up */ 3756 periodic_recalc (EV_A_ w);
2708 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2709 } 3757 }
2710 else 3758 else
2711 ev_at (w) = w->offset; 3759 ev_at (w) = w->offset;
2712 3760
2713 EV_FREQUENT_CHECK; 3761 EV_FREQUENT_CHECK;
… …
2723 3771
2724 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3772 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2725} 3773}
2726 3774
2727void noinline 3775void noinline
2728ev_periodic_stop (EV_P_ ev_periodic *w) 3776ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2729{ 3777{
2730 clear_pending (EV_A_ (W)w); 3778 clear_pending (EV_A_ (W)w);
2731 if (expect_false (!ev_is_active (w))) 3779 if (expect_false (!ev_is_active (w)))
2732 return; 3780 return;
2733 3781
… …
2751 3799
2752 EV_FREQUENT_CHECK; 3800 EV_FREQUENT_CHECK;
2753} 3801}
2754 3802
2755void noinline 3803void noinline
2756ev_periodic_again (EV_P_ ev_periodic *w) 3804ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2757{ 3805{
2758 /* TODO: use adjustheap and recalculation */ 3806 /* TODO: use adjustheap and recalculation */
2759 ev_periodic_stop (EV_A_ w); 3807 ev_periodic_stop (EV_A_ w);
2760 ev_periodic_start (EV_A_ w); 3808 ev_periodic_start (EV_A_ w);
2761} 3809}
… …
2766#endif 3814#endif
2767 3815
2768#if EV_SIGNAL_ENABLE 3816#if EV_SIGNAL_ENABLE
2769 3817
2770void noinline 3818void noinline
2771ev_signal_start (EV_P_ ev_signal *w) 3819ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2772{ 3820{
2773 if (expect_false (ev_is_active (w))) 3821 if (expect_false (ev_is_active (w)))
2774 return; 3822 return;
2775 3823
2776 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3824 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2778#if EV_MULTIPLICITY 3826#if EV_MULTIPLICITY
2779 assert (("libev: a signal must not be attached to two different loops", 3827 assert (("libev: a signal must not be attached to two different loops",
2780 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3828 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2781 3829
2782 signals [w->signum - 1].loop = EV_A; 3830 signals [w->signum - 1].loop = EV_A;
3831 ECB_MEMORY_FENCE_RELEASE;
2783#endif 3832#endif
2784 3833
2785 EV_FREQUENT_CHECK; 3834 EV_FREQUENT_CHECK;
2786 3835
2787#if EV_USE_SIGNALFD 3836#if EV_USE_SIGNALFD
… …
2834 sa.sa_handler = ev_sighandler; 3883 sa.sa_handler = ev_sighandler;
2835 sigfillset (&sa.sa_mask); 3884 sigfillset (&sa.sa_mask);
2836 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3885 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2837 sigaction (w->signum, &sa, 0); 3886 sigaction (w->signum, &sa, 0);
2838 3887
3888 if (origflags & EVFLAG_NOSIGMASK)
3889 {
2839 sigemptyset (&sa.sa_mask); 3890 sigemptyset (&sa.sa_mask);
2840 sigaddset (&sa.sa_mask, w->signum); 3891 sigaddset (&sa.sa_mask, w->signum);
2841 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3892 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3893 }
2842#endif 3894#endif
2843 } 3895 }
2844 3896
2845 EV_FREQUENT_CHECK; 3897 EV_FREQUENT_CHECK;
2846} 3898}
2847 3899
2848void noinline 3900void noinline
2849ev_signal_stop (EV_P_ ev_signal *w) 3901ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2850{ 3902{
2851 clear_pending (EV_A_ (W)w); 3903 clear_pending (EV_A_ (W)w);
2852 if (expect_false (!ev_is_active (w))) 3904 if (expect_false (!ev_is_active (w)))
2853 return; 3905 return;
2854 3906
… …
2885#endif 3937#endif
2886 3938
2887#if EV_CHILD_ENABLE 3939#if EV_CHILD_ENABLE
2888 3940
2889void 3941void
2890ev_child_start (EV_P_ ev_child *w) 3942ev_child_start (EV_P_ ev_child *w) EV_THROW
2891{ 3943{
2892#if EV_MULTIPLICITY 3944#if EV_MULTIPLICITY
2893 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3945 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2894#endif 3946#endif
2895 if (expect_false (ev_is_active (w))) 3947 if (expect_false (ev_is_active (w)))
… …
2902 3954
2903 EV_FREQUENT_CHECK; 3955 EV_FREQUENT_CHECK;
2904} 3956}
2905 3957
2906void 3958void
2907ev_child_stop (EV_P_ ev_child *w) 3959ev_child_stop (EV_P_ ev_child *w) EV_THROW
2908{ 3960{
2909 clear_pending (EV_A_ (W)w); 3961 clear_pending (EV_A_ (W)w);
2910 if (expect_false (!ev_is_active (w))) 3962 if (expect_false (!ev_is_active (w)))
2911 return; 3963 return;
2912 3964
… …
2939# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3991# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2940 3992
2941static void noinline 3993static void noinline
2942infy_add (EV_P_ ev_stat *w) 3994infy_add (EV_P_ ev_stat *w)
2943{ 3995{
2944 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); 3996 w->wd = inotify_add_watch (fs_fd, w->path,
3997 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3998 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3999 | IN_DONT_FOLLOW | IN_MASK_ADD);
2945 4000
2946 if (w->wd >= 0) 4001 if (w->wd >= 0)
2947 { 4002 {
2948 struct statfs sfs; 4003 struct statfs sfs;
2949 4004
… …
2953 4008
2954 if (!fs_2625) 4009 if (!fs_2625)
2955 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4010 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2956 else if (!statfs (w->path, &sfs) 4011 else if (!statfs (w->path, &sfs)
2957 && (sfs.f_type == 0x1373 /* devfs */ 4012 && (sfs.f_type == 0x1373 /* devfs */
4013 || sfs.f_type == 0x4006 /* fat */
4014 || sfs.f_type == 0x4d44 /* msdos */
2958 || sfs.f_type == 0xEF53 /* ext2/3 */ 4015 || sfs.f_type == 0xEF53 /* ext2/3 */
4016 || sfs.f_type == 0x72b6 /* jffs2 */
4017 || sfs.f_type == 0x858458f6 /* ramfs */
4018 || sfs.f_type == 0x5346544e /* ntfs */
2959 || sfs.f_type == 0x3153464a /* jfs */ 4019 || sfs.f_type == 0x3153464a /* jfs */
4020 || sfs.f_type == 0x9123683e /* btrfs */
2960 || sfs.f_type == 0x52654973 /* reiser3 */ 4021 || sfs.f_type == 0x52654973 /* reiser3 */
2961 || sfs.f_type == 0x01021994 /* tempfs */ 4022 || sfs.f_type == 0x01021994 /* tmpfs */
2962 || sfs.f_type == 0x58465342 /* xfs */)) 4023 || sfs.f_type == 0x58465342 /* xfs */))
2963 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4024 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2964 else 4025 else
2965 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4026 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2966 } 4027 }
… …
2987 if (!pend || pend == path) 4048 if (!pend || pend == path)
2988 break; 4049 break;
2989 4050
2990 *pend = 0; 4051 *pend = 0;
2991 w->wd = inotify_add_watch (fs_fd, path, mask); 4052 w->wd = inotify_add_watch (fs_fd, path, mask);
2992 } 4053 }
2993 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4054 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2994 } 4055 }
2995 } 4056 }
2996 4057
2997 if (w->wd >= 0) 4058 if (w->wd >= 0)
… …
3064 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4125 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3065 ofs += sizeof (struct inotify_event) + ev->len; 4126 ofs += sizeof (struct inotify_event) + ev->len;
3066 } 4127 }
3067} 4128}
3068 4129
3069inline_size unsigned int
3070ev_linux_version (void)
3071{
3072 struct utsname buf;
3073 unsigned int v;
3074 int i;
3075 char *p = buf.release;
3076
3077 if (uname (&buf))
3078 return 0;
3079
3080 for (i = 3+1; --i; )
3081 {
3082 unsigned int c = 0;
3083
3084 for (;;)
3085 {
3086 if (*p >= '0' && *p <= '9')
3087 c = c * 10 + *p++ - '0';
3088 else
3089 {
3090 p += *p == '.';
3091 break;
3092 }
3093 }
3094
3095 v = (v << 8) | c;
3096 }
3097
3098 return v;
3099}
3100
3101inline_size void 4130inline_size void ecb_cold
3102ev_check_2625 (EV_P) 4131ev_check_2625 (EV_P)
3103{ 4132{
3104 /* kernels < 2.6.25 are borked 4133 /* kernels < 2.6.25 are borked
3105 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4134 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3106 */ 4135 */
… …
3111} 4140}
3112 4141
3113inline_size int 4142inline_size int
3114infy_newfd (void) 4143infy_newfd (void)
3115{ 4144{
3116#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4145#if defined IN_CLOEXEC && defined IN_NONBLOCK
3117 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4146 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3118 if (fd >= 0) 4147 if (fd >= 0)
3119 return fd; 4148 return fd;
3120#endif 4149#endif
3121 return inotify_init (); 4150 return inotify_init ();
… …
3196#else 4225#else
3197# define EV_LSTAT(p,b) lstat (p, b) 4226# define EV_LSTAT(p,b) lstat (p, b)
3198#endif 4227#endif
3199 4228
3200void 4229void
3201ev_stat_stat (EV_P_ ev_stat *w) 4230ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3202{ 4231{
3203 if (lstat (w->path, &w->attr) < 0) 4232 if (lstat (w->path, &w->attr) < 0)
3204 w->attr.st_nlink = 0; 4233 w->attr.st_nlink = 0;
3205 else if (!w->attr.st_nlink) 4234 else if (!w->attr.st_nlink)
3206 w->attr.st_nlink = 1; 4235 w->attr.st_nlink = 1;
… …
3245 ev_feed_event (EV_A_ w, EV_STAT); 4274 ev_feed_event (EV_A_ w, EV_STAT);
3246 } 4275 }
3247} 4276}
3248 4277
3249void 4278void
3250ev_stat_start (EV_P_ ev_stat *w) 4279ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3251{ 4280{
3252 if (expect_false (ev_is_active (w))) 4281 if (expect_false (ev_is_active (w)))
3253 return; 4282 return;
3254 4283
3255 ev_stat_stat (EV_A_ w); 4284 ev_stat_stat (EV_A_ w);
… …
3276 4305
3277 EV_FREQUENT_CHECK; 4306 EV_FREQUENT_CHECK;
3278} 4307}
3279 4308
3280void 4309void
3281ev_stat_stop (EV_P_ ev_stat *w) 4310ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3282{ 4311{
3283 clear_pending (EV_A_ (W)w); 4312 clear_pending (EV_A_ (W)w);
3284 if (expect_false (!ev_is_active (w))) 4313 if (expect_false (!ev_is_active (w)))
3285 return; 4314 return;
3286 4315
… …
3302} 4331}
3303#endif 4332#endif
3304 4333
3305#if EV_IDLE_ENABLE 4334#if EV_IDLE_ENABLE
3306void 4335void
3307ev_idle_start (EV_P_ ev_idle *w) 4336ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3308{ 4337{
3309 if (expect_false (ev_is_active (w))) 4338 if (expect_false (ev_is_active (w)))
3310 return; 4339 return;
3311 4340
3312 pri_adjust (EV_A_ (W)w); 4341 pri_adjust (EV_A_ (W)w);
… …
3325 4354
3326 EV_FREQUENT_CHECK; 4355 EV_FREQUENT_CHECK;
3327} 4356}
3328 4357
3329void 4358void
3330ev_idle_stop (EV_P_ ev_idle *w) 4359ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3331{ 4360{
3332 clear_pending (EV_A_ (W)w); 4361 clear_pending (EV_A_ (W)w);
3333 if (expect_false (!ev_is_active (w))) 4362 if (expect_false (!ev_is_active (w)))
3334 return; 4363 return;
3335 4364
… …
3349} 4378}
3350#endif 4379#endif
3351 4380
3352#if EV_PREPARE_ENABLE 4381#if EV_PREPARE_ENABLE
3353void 4382void
3354ev_prepare_start (EV_P_ ev_prepare *w) 4383ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3355{ 4384{
3356 if (expect_false (ev_is_active (w))) 4385 if (expect_false (ev_is_active (w)))
3357 return; 4386 return;
3358 4387
3359 EV_FREQUENT_CHECK; 4388 EV_FREQUENT_CHECK;
… …
3364 4393
3365 EV_FREQUENT_CHECK; 4394 EV_FREQUENT_CHECK;
3366} 4395}
3367 4396
3368void 4397void
3369ev_prepare_stop (EV_P_ ev_prepare *w) 4398ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3370{ 4399{
3371 clear_pending (EV_A_ (W)w); 4400 clear_pending (EV_A_ (W)w);
3372 if (expect_false (!ev_is_active (w))) 4401 if (expect_false (!ev_is_active (w)))
3373 return; 4402 return;
3374 4403
… …
3387} 4416}
3388#endif 4417#endif
3389 4418
3390#if EV_CHECK_ENABLE 4419#if EV_CHECK_ENABLE
3391void 4420void
3392ev_check_start (EV_P_ ev_check *w) 4421ev_check_start (EV_P_ ev_check *w) EV_THROW
3393{ 4422{
3394 if (expect_false (ev_is_active (w))) 4423 if (expect_false (ev_is_active (w)))
3395 return; 4424 return;
3396 4425
3397 EV_FREQUENT_CHECK; 4426 EV_FREQUENT_CHECK;
… …
3402 4431
3403 EV_FREQUENT_CHECK; 4432 EV_FREQUENT_CHECK;
3404} 4433}
3405 4434
3406void 4435void
3407ev_check_stop (EV_P_ ev_check *w) 4436ev_check_stop (EV_P_ ev_check *w) EV_THROW
3408{ 4437{
3409 clear_pending (EV_A_ (W)w); 4438 clear_pending (EV_A_ (W)w);
3410 if (expect_false (!ev_is_active (w))) 4439 if (expect_false (!ev_is_active (w)))
3411 return; 4440 return;
3412 4441
… …
3425} 4454}
3426#endif 4455#endif
3427 4456
3428#if EV_EMBED_ENABLE 4457#if EV_EMBED_ENABLE
3429void noinline 4458void noinline
3430ev_embed_sweep (EV_P_ ev_embed *w) 4459ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3431{ 4460{
3432 ev_loop (w->other, EVLOOP_NONBLOCK); 4461 ev_run (w->other, EVRUN_NOWAIT);
3433} 4462}
3434 4463
3435static void 4464static void
3436embed_io_cb (EV_P_ ev_io *io, int revents) 4465embed_io_cb (EV_P_ ev_io *io, int revents)
3437{ 4466{
3438 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4467 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3439 4468
3440 if (ev_cb (w)) 4469 if (ev_cb (w))
3441 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4470 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3442 else 4471 else
3443 ev_loop (w->other, EVLOOP_NONBLOCK); 4472 ev_run (w->other, EVRUN_NOWAIT);
3444} 4473}
3445 4474
3446static void 4475static void
3447embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4476embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3448{ 4477{
… …
3452 EV_P = w->other; 4481 EV_P = w->other;
3453 4482
3454 while (fdchangecnt) 4483 while (fdchangecnt)
3455 { 4484 {
3456 fd_reify (EV_A); 4485 fd_reify (EV_A);
3457 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4486 ev_run (EV_A_ EVRUN_NOWAIT);
3458 } 4487 }
3459 } 4488 }
3460} 4489}
3461 4490
3462static void 4491static void
… …
3468 4497
3469 { 4498 {
3470 EV_P = w->other; 4499 EV_P = w->other;
3471 4500
3472 ev_loop_fork (EV_A); 4501 ev_loop_fork (EV_A);
3473 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4502 ev_run (EV_A_ EVRUN_NOWAIT);
3474 } 4503 }
3475 4504
3476 ev_embed_start (EV_A_ w); 4505 ev_embed_start (EV_A_ w);
3477} 4506}
3478 4507
… …
3483 ev_idle_stop (EV_A_ idle); 4512 ev_idle_stop (EV_A_ idle);
3484} 4513}
3485#endif 4514#endif
3486 4515
3487void 4516void
3488ev_embed_start (EV_P_ ev_embed *w) 4517ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3489{ 4518{
3490 if (expect_false (ev_is_active (w))) 4519 if (expect_false (ev_is_active (w)))
3491 return; 4520 return;
3492 4521
3493 { 4522 {
… …
3514 4543
3515 EV_FREQUENT_CHECK; 4544 EV_FREQUENT_CHECK;
3516} 4545}
3517 4546
3518void 4547void
3519ev_embed_stop (EV_P_ ev_embed *w) 4548ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3520{ 4549{
3521 clear_pending (EV_A_ (W)w); 4550 clear_pending (EV_A_ (W)w);
3522 if (expect_false (!ev_is_active (w))) 4551 if (expect_false (!ev_is_active (w)))
3523 return; 4552 return;
3524 4553
… …
3534} 4563}
3535#endif 4564#endif
3536 4565
3537#if EV_FORK_ENABLE 4566#if EV_FORK_ENABLE
3538void 4567void
3539ev_fork_start (EV_P_ ev_fork *w) 4568ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3540{ 4569{
3541 if (expect_false (ev_is_active (w))) 4570 if (expect_false (ev_is_active (w)))
3542 return; 4571 return;
3543 4572
3544 EV_FREQUENT_CHECK; 4573 EV_FREQUENT_CHECK;
… …
3549 4578
3550 EV_FREQUENT_CHECK; 4579 EV_FREQUENT_CHECK;
3551} 4580}
3552 4581
3553void 4582void
3554ev_fork_stop (EV_P_ ev_fork *w) 4583ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3555{ 4584{
3556 clear_pending (EV_A_ (W)w); 4585 clear_pending (EV_A_ (W)w);
3557 if (expect_false (!ev_is_active (w))) 4586 if (expect_false (!ev_is_active (w)))
3558 return; 4587 return;
3559 4588
… …
3570 4599
3571 EV_FREQUENT_CHECK; 4600 EV_FREQUENT_CHECK;
3572} 4601}
3573#endif 4602#endif
3574 4603
4604#if EV_CLEANUP_ENABLE
4605void
4606ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4607{
4608 if (expect_false (ev_is_active (w)))
4609 return;
4610
4611 EV_FREQUENT_CHECK;
4612
4613 ev_start (EV_A_ (W)w, ++cleanupcnt);
4614 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4615 cleanups [cleanupcnt - 1] = w;
4616
4617 /* cleanup watchers should never keep a refcount on the loop */
4618 ev_unref (EV_A);
4619 EV_FREQUENT_CHECK;
4620}
4621
4622void
4623ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4624{
4625 clear_pending (EV_A_ (W)w);
4626 if (expect_false (!ev_is_active (w)))
4627 return;
4628
4629 EV_FREQUENT_CHECK;
4630 ev_ref (EV_A);
4631
4632 {
4633 int active = ev_active (w);
4634
4635 cleanups [active - 1] = cleanups [--cleanupcnt];
4636 ev_active (cleanups [active - 1]) = active;
4637 }
4638
4639 ev_stop (EV_A_ (W)w);
4640
4641 EV_FREQUENT_CHECK;
4642}
4643#endif
4644
3575#if EV_ASYNC_ENABLE 4645#if EV_ASYNC_ENABLE
3576void 4646void
3577ev_async_start (EV_P_ ev_async *w) 4647ev_async_start (EV_P_ ev_async *w) EV_THROW
3578{ 4648{
3579 if (expect_false (ev_is_active (w))) 4649 if (expect_false (ev_is_active (w)))
3580 return; 4650 return;
3581 4651
3582 w->sent = 0; 4652 w->sent = 0;
… …
3591 4661
3592 EV_FREQUENT_CHECK; 4662 EV_FREQUENT_CHECK;
3593} 4663}
3594 4664
3595void 4665void
3596ev_async_stop (EV_P_ ev_async *w) 4666ev_async_stop (EV_P_ ev_async *w) EV_THROW
3597{ 4667{
3598 clear_pending (EV_A_ (W)w); 4668 clear_pending (EV_A_ (W)w);
3599 if (expect_false (!ev_is_active (w))) 4669 if (expect_false (!ev_is_active (w)))
3600 return; 4670 return;
3601 4671
… …
3612 4682
3613 EV_FREQUENT_CHECK; 4683 EV_FREQUENT_CHECK;
3614} 4684}
3615 4685
3616void 4686void
3617ev_async_send (EV_P_ ev_async *w) 4687ev_async_send (EV_P_ ev_async *w) EV_THROW
3618{ 4688{
3619 w->sent = 1; 4689 w->sent = 1;
3620 evpipe_write (EV_A_ &async_pending); 4690 evpipe_write (EV_A_ &async_pending);
3621} 4691}
3622#endif 4692#endif
… …
3659 4729
3660 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4730 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3661} 4731}
3662 4732
3663void 4733void
3664ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4734ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3665{ 4735{
3666 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4736 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3667 4737
3668 if (expect_false (!once)) 4738 if (expect_false (!once))
3669 { 4739 {
… …
3690} 4760}
3691 4761
3692/*****************************************************************************/ 4762/*****************************************************************************/
3693 4763
3694#if EV_WALK_ENABLE 4764#if EV_WALK_ENABLE
3695void 4765void ecb_cold
3696ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4766ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3697{ 4767{
3698 int i, j; 4768 int i, j;
3699 ev_watcher_list *wl, *wn; 4769 ev_watcher_list *wl, *wn;
3700 4770
3701 if (types & (EV_IO | EV_EMBED)) 4771 if (types & (EV_IO | EV_EMBED))
… …
3744 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4814 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3745#endif 4815#endif
3746 4816
3747#if EV_IDLE_ENABLE 4817#if EV_IDLE_ENABLE
3748 if (types & EV_IDLE) 4818 if (types & EV_IDLE)
3749 for (j = NUMPRI; i--; ) 4819 for (j = NUMPRI; j--; )
3750 for (i = idlecnt [j]; i--; ) 4820 for (i = idlecnt [j]; i--; )
3751 cb (EV_A_ EV_IDLE, idles [j][i]); 4821 cb (EV_A_ EV_IDLE, idles [j][i]);
3752#endif 4822#endif
3753 4823
3754#if EV_FORK_ENABLE 4824#if EV_FORK_ENABLE
… …
3807 4877
3808#if EV_MULTIPLICITY 4878#if EV_MULTIPLICITY
3809 #include "ev_wrap.h" 4879 #include "ev_wrap.h"
3810#endif 4880#endif
3811 4881
3812#ifdef __cplusplus
3813}
3814#endif
3815

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