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Comparing libev/ev.c (file contents):
Revision 1.350 by root, Sat Oct 16 00:59:56 2010 UTC vs.
Revision 1.463 by root, Thu Jan 16 11:51:05 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 (©) 2009-2013 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
513#ifndef ECB_H
514#define ECB_H
515
516/* 16 bits major, 16 bits minor */
517#define ECB_VERSION 0x00010003
518
519#ifdef _WIN32
520 typedef signed char int8_t;
521 typedef unsigned char uint8_t;
522 typedef signed short int16_t;
523 typedef unsigned short uint16_t;
524 typedef signed int int32_t;
525 typedef unsigned int uint32_t;
477#if __GNUC__ >= 4 526 #if __GNUC__
478# define expect(expr,value) __builtin_expect ((expr),(value)) 527 typedef signed long long int64_t;
479# define noinline __attribute__ ((noinline)) 528 typedef unsigned long long uint64_t;
529 #else /* _MSC_VER || __BORLANDC__ */
530 typedef signed __int64 int64_t;
531 typedef unsigned __int64 uint64_t;
532 #endif
533 #ifdef _WIN64
534 #define ECB_PTRSIZE 8
535 typedef uint64_t uintptr_t;
536 typedef int64_t intptr_t;
537 #else
538 #define ECB_PTRSIZE 4
539 typedef uint32_t uintptr_t;
540 typedef int32_t intptr_t;
541 #endif
480#else 542#else
481# define expect(expr,value) (expr) 543 #include <inttypes.h>
482# define noinline 544 #if UINTMAX_MAX > 0xffffffffU
483# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 545 #define ECB_PTRSIZE 8
484# define inline 546 #else
547 #define ECB_PTRSIZE 4
548 #endif
485# endif 549#endif
550
551/* work around x32 idiocy by defining proper macros */
552#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
553 #if _ILP32
554 #define ECB_AMD64_X32 1
555 #else
556 #define ECB_AMD64 1
486#endif 557 #endif
558#endif
487 559
560/* many compilers define _GNUC_ to some versions but then only implement
561 * what their idiot authors think are the "more important" extensions,
562 * causing enormous grief in return for some better fake benchmark numbers.
563 * or so.
564 * we try to detect these and simply assume they are not gcc - if they have
565 * an issue with that they should have done it right in the first place.
566 */
567#ifndef ECB_GCC_VERSION
568 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
569 #define ECB_GCC_VERSION(major,minor) 0
570 #else
571 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
572 #endif
573#endif
574
575#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
576#define ECB_C99 (__STDC_VERSION__ >= 199901L)
577#define ECB_C11 (__STDC_VERSION__ >= 201112L)
578#define ECB_CPP (__cplusplus+0)
579#define ECB_CPP11 (__cplusplus >= 201103L)
580
581#if ECB_CPP
582 #define ECB_EXTERN_C extern "C"
583 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
584 #define ECB_EXTERN_C_END }
585#else
586 #define ECB_EXTERN_C extern
587 #define ECB_EXTERN_C_BEG
588 #define ECB_EXTERN_C_END
589#endif
590
591/*****************************************************************************/
592
593/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
594/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
595
596#if ECB_NO_THREADS
597 #define ECB_NO_SMP 1
598#endif
599
600#if ECB_NO_SMP
601 #define ECB_MEMORY_FENCE do { } while (0)
602#endif
603
604#ifndef ECB_MEMORY_FENCE
605 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
606 #if __i386 || __i386__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
608 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
612 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
613 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
614 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
616 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
617 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
618 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
619 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
620 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
622 #elif (__sparc || __sparc__) && !__sparcv8
623 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
624 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
625 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
626 #elif defined __s390__ || defined __s390x__
627 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
628 #elif defined __mips__
629 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
630 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
631 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
632 #elif defined __alpha__
633 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
634 #elif defined __hppa__
635 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
636 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
637 #elif defined __ia64__
638 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
639 #elif defined __m68k__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
641 #elif defined __m88k__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
643 #elif defined __sh__
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
645 #endif
646 #endif
647#endif
648
649#ifndef ECB_MEMORY_FENCE
650 #if ECB_GCC_VERSION(4,7)
651 /* see comment below (stdatomic.h) about the C11 memory model. */
652 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
653
654 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
655 * without risking compile time errors with other compilers. We *could*
656 * define our own ecb_clang_has_feature, but I just can't be bothered to work
657 * around this shit time and again.
658 * #elif defined __clang && __has_feature (cxx_atomic)
659 * // see comment below (stdatomic.h) about the C11 memory model.
660 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
661 */
662
663 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
664 #define ECB_MEMORY_FENCE __sync_synchronize ()
665 #elif _MSC_VER >= 1500 /* VC++ 2008 */
666 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
667 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
668 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
669 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
670 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
671 #elif _MSC_VER >= 1400 /* VC++ 2005 */
672 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
673 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
674 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
675 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
676 #elif defined _WIN32
677 #include <WinNT.h>
678 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
679 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
680 #include <mbarrier.h>
681 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
682 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
683 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
684 #elif __xlC__
685 #define ECB_MEMORY_FENCE __sync ()
686 #endif
687#endif
688
689#ifndef ECB_MEMORY_FENCE
690 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
691 /* we assume that these memory fences work on all variables/all memory accesses, */
692 /* not just C11 atomics and atomic accesses */
693 #include <stdatomic.h>
694 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
695 /* any fence other than seq_cst, which isn't very efficient for us. */
696 /* Why that is, we don't know - either the C11 memory model is quite useless */
697 /* for most usages, or gcc and clang have a bug */
698 /* I *currently* lean towards the latter, and inefficiently implement */
699 /* all three of ecb's fences as a seq_cst fence */
700 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
701 #endif
702#endif
703
704#ifndef ECB_MEMORY_FENCE
705 #if !ECB_AVOID_PTHREADS
706 /*
707 * if you get undefined symbol references to pthread_mutex_lock,
708 * or failure to find pthread.h, then you should implement
709 * the ECB_MEMORY_FENCE operations for your cpu/compiler
710 * OR provide pthread.h and link against the posix thread library
711 * of your system.
712 */
713 #include <pthread.h>
714 #define ECB_NEEDS_PTHREADS 1
715 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
716
717 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
718 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
719 #endif
720#endif
721
722#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
723 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
724#endif
725
726#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
727 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
728#endif
729
730/*****************************************************************************/
731
732#if __cplusplus
733 #define ecb_inline static inline
734#elif ECB_GCC_VERSION(2,5)
735 #define ecb_inline static __inline__
736#elif ECB_C99
737 #define ecb_inline static inline
738#else
739 #define ecb_inline static
740#endif
741
742#if ECB_GCC_VERSION(3,3)
743 #define ecb_restrict __restrict__
744#elif ECB_C99
745 #define ecb_restrict restrict
746#else
747 #define ecb_restrict
748#endif
749
750typedef int ecb_bool;
751
752#define ECB_CONCAT_(a, b) a ## b
753#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
754#define ECB_STRINGIFY_(a) # a
755#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
756
757#define ecb_function_ ecb_inline
758
759#if ECB_GCC_VERSION(3,1)
760 #define ecb_attribute(attrlist) __attribute__(attrlist)
761 #define ecb_is_constant(expr) __builtin_constant_p (expr)
762 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
763 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
764#else
765 #define ecb_attribute(attrlist)
766 #define ecb_is_constant(expr) 0
767 #define ecb_expect(expr,value) (expr)
768 #define ecb_prefetch(addr,rw,locality)
769#endif
770
771/* no emulation for ecb_decltype */
772#if ECB_GCC_VERSION(4,5)
773 #define ecb_decltype(x) __decltype(x)
774#elif ECB_GCC_VERSION(3,0)
775 #define ecb_decltype(x) __typeof(x)
776#endif
777
778#define ecb_noinline ecb_attribute ((__noinline__))
779#define ecb_unused ecb_attribute ((__unused__))
780#define ecb_const ecb_attribute ((__const__))
781#define ecb_pure ecb_attribute ((__pure__))
782
783#if ECB_C11
784 #define ecb_noreturn _Noreturn
785#else
786 #define ecb_noreturn ecb_attribute ((__noreturn__))
787#endif
788
789#if ECB_GCC_VERSION(4,3)
790 #define ecb_artificial ecb_attribute ((__artificial__))
791 #define ecb_hot ecb_attribute ((__hot__))
792 #define ecb_cold ecb_attribute ((__cold__))
793#else
794 #define ecb_artificial
795 #define ecb_hot
796 #define ecb_cold
797#endif
798
799/* put around conditional expressions if you are very sure that the */
800/* expression is mostly true or mostly false. note that these return */
801/* booleans, not the expression. */
488#define expect_false(expr) expect ((expr) != 0, 0) 802#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
489#define expect_true(expr) expect ((expr) != 0, 1) 803#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
804/* for compatibility to the rest of the world */
805#define ecb_likely(expr) ecb_expect_true (expr)
806#define ecb_unlikely(expr) ecb_expect_false (expr)
807
808/* count trailing zero bits and count # of one bits */
809#if ECB_GCC_VERSION(3,4)
810 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
811 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
812 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
813 #define ecb_ctz32(x) __builtin_ctz (x)
814 #define ecb_ctz64(x) __builtin_ctzll (x)
815 #define ecb_popcount32(x) __builtin_popcount (x)
816 /* no popcountll */
817#else
818 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
819 ecb_function_ int
820 ecb_ctz32 (uint32_t x)
821 {
822 int r = 0;
823
824 x &= ~x + 1; /* this isolates the lowest bit */
825
826#if ECB_branchless_on_i386
827 r += !!(x & 0xaaaaaaaa) << 0;
828 r += !!(x & 0xcccccccc) << 1;
829 r += !!(x & 0xf0f0f0f0) << 2;
830 r += !!(x & 0xff00ff00) << 3;
831 r += !!(x & 0xffff0000) << 4;
832#else
833 if (x & 0xaaaaaaaa) r += 1;
834 if (x & 0xcccccccc) r += 2;
835 if (x & 0xf0f0f0f0) r += 4;
836 if (x & 0xff00ff00) r += 8;
837 if (x & 0xffff0000) r += 16;
838#endif
839
840 return r;
841 }
842
843 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
844 ecb_function_ int
845 ecb_ctz64 (uint64_t x)
846 {
847 int shift = x & 0xffffffffU ? 0 : 32;
848 return ecb_ctz32 (x >> shift) + shift;
849 }
850
851 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
852 ecb_function_ int
853 ecb_popcount32 (uint32_t x)
854 {
855 x -= (x >> 1) & 0x55555555;
856 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
857 x = ((x >> 4) + x) & 0x0f0f0f0f;
858 x *= 0x01010101;
859
860 return x >> 24;
861 }
862
863 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
864 ecb_function_ int ecb_ld32 (uint32_t x)
865 {
866 int r = 0;
867
868 if (x >> 16) { x >>= 16; r += 16; }
869 if (x >> 8) { x >>= 8; r += 8; }
870 if (x >> 4) { x >>= 4; r += 4; }
871 if (x >> 2) { x >>= 2; r += 2; }
872 if (x >> 1) { r += 1; }
873
874 return r;
875 }
876
877 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
878 ecb_function_ int ecb_ld64 (uint64_t x)
879 {
880 int r = 0;
881
882 if (x >> 32) { x >>= 32; r += 32; }
883
884 return r + ecb_ld32 (x);
885 }
886#endif
887
888ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
889ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
890ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
891ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
892
893ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
894ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
895{
896 return ( (x * 0x0802U & 0x22110U)
897 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
898}
899
900ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
901ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
902{
903 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
904 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
905 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
906 x = ( x >> 8 ) | ( x << 8);
907
908 return x;
909}
910
911ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
912ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
913{
914 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
915 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
916 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
917 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
918 x = ( x >> 16 ) | ( x << 16);
919
920 return x;
921}
922
923/* popcount64 is only available on 64 bit cpus as gcc builtin */
924/* so for this version we are lazy */
925ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
926ecb_function_ int
927ecb_popcount64 (uint64_t x)
928{
929 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
930}
931
932ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
933ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
934ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
935ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
936ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
937ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
938ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
939ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
940
941ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
942ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
943ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
944ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
945ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
946ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
947ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
948ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
949
950#if ECB_GCC_VERSION(4,3)
951 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
952 #define ecb_bswap32(x) __builtin_bswap32 (x)
953 #define ecb_bswap64(x) __builtin_bswap64 (x)
954#else
955 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
956 ecb_function_ uint16_t
957 ecb_bswap16 (uint16_t x)
958 {
959 return ecb_rotl16 (x, 8);
960 }
961
962 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
963 ecb_function_ uint32_t
964 ecb_bswap32 (uint32_t x)
965 {
966 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
967 }
968
969 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
970 ecb_function_ uint64_t
971 ecb_bswap64 (uint64_t x)
972 {
973 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
974 }
975#endif
976
977#if ECB_GCC_VERSION(4,5)
978 #define ecb_unreachable() __builtin_unreachable ()
979#else
980 /* this seems to work fine, but gcc always emits a warning for it :/ */
981 ecb_inline void ecb_unreachable (void) ecb_noreturn;
982 ecb_inline void ecb_unreachable (void) { }
983#endif
984
985/* try to tell the compiler that some condition is definitely true */
986#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
987
988ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
989ecb_inline unsigned char
990ecb_byteorder_helper (void)
991{
992 /* the union code still generates code under pressure in gcc, */
993 /* but less than using pointers, and always seems to */
994 /* successfully return a constant. */
995 /* the reason why we have this horrible preprocessor mess */
996 /* is to avoid it in all cases, at least on common architectures */
997 /* or when using a recent enough gcc version (>= 4.6) */
998#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
999 return 0x44;
1000#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1001 return 0x44;
1002#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1003 return 0x11;
1004#else
1005 union
1006 {
1007 uint32_t i;
1008 uint8_t c;
1009 } u = { 0x11223344 };
1010 return u.c;
1011#endif
1012}
1013
1014ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1015ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1016ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1017ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1018
1019#if ECB_GCC_VERSION(3,0) || ECB_C99
1020 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1021#else
1022 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1023#endif
1024
1025#if __cplusplus
1026 template<typename T>
1027 static inline T ecb_div_rd (T val, T div)
1028 {
1029 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1030 }
1031 template<typename T>
1032 static inline T ecb_div_ru (T val, T div)
1033 {
1034 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1035 }
1036#else
1037 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1038 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1039#endif
1040
1041#if ecb_cplusplus_does_not_suck
1042 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1043 template<typename T, int N>
1044 static inline int ecb_array_length (const T (&arr)[N])
1045 {
1046 return N;
1047 }
1048#else
1049 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1050#endif
1051
1052/*******************************************************************************/
1053/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1054
1055/* basically, everything uses "ieee pure-endian" floating point numbers */
1056/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1057#if 0 \
1058 || __i386 || __i386__ \
1059 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1060 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1061 || defined __arm__ && defined __ARM_EABI__ \
1062 || defined __s390__ || defined __s390x__ \
1063 || defined __mips__ \
1064 || defined __alpha__ \
1065 || defined __hppa__ \
1066 || defined __ia64__ \
1067 || defined __m68k__ \
1068 || defined __m88k__ \
1069 || defined __sh__ \
1070 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1071 #define ECB_STDFP 1
1072 #include <string.h> /* for memcpy */
1073#else
1074 #define ECB_STDFP 0
1075#endif
1076
1077#ifndef ECB_NO_LIBM
1078
1079 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1080
1081 /* only the oldest of old doesn't have this one. solaris. */
1082 #ifdef INFINITY
1083 #define ECB_INFINITY INFINITY
1084 #else
1085 #define ECB_INFINITY HUGE_VAL
1086 #endif
1087
1088 #ifdef NAN
1089 #define ECB_NAN NAN
1090 #else
1091 #define ECB_NAN ECB_INFINITY
1092 #endif
1093
1094 /* converts an ieee half/binary16 to a float */
1095 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1096 ecb_function_ float
1097 ecb_binary16_to_float (uint16_t x)
1098 {
1099 int e = (x >> 10) & 0x1f;
1100 int m = x & 0x3ff;
1101 float r;
1102
1103 if (!e ) r = ldexpf (m , -24);
1104 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1105 else if (m ) r = ECB_NAN;
1106 else r = ECB_INFINITY;
1107
1108 return x & 0x8000 ? -r : r;
1109 }
1110
1111 /* convert a float to ieee single/binary32 */
1112 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1113 ecb_function_ uint32_t
1114 ecb_float_to_binary32 (float x)
1115 {
1116 uint32_t r;
1117
1118 #if ECB_STDFP
1119 memcpy (&r, &x, 4);
1120 #else
1121 /* slow emulation, works for anything but -0 */
1122 uint32_t m;
1123 int e;
1124
1125 if (x == 0e0f ) return 0x00000000U;
1126 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1127 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1128 if (x != x ) return 0x7fbfffffU;
1129
1130 m = frexpf (x, &e) * 0x1000000U;
1131
1132 r = m & 0x80000000U;
1133
1134 if (r)
1135 m = -m;
1136
1137 if (e <= -126)
1138 {
1139 m &= 0xffffffU;
1140 m >>= (-125 - e);
1141 e = -126;
1142 }
1143
1144 r |= (e + 126) << 23;
1145 r |= m & 0x7fffffU;
1146 #endif
1147
1148 return r;
1149 }
1150
1151 /* converts an ieee single/binary32 to a float */
1152 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1153 ecb_function_ float
1154 ecb_binary32_to_float (uint32_t x)
1155 {
1156 float r;
1157
1158 #if ECB_STDFP
1159 memcpy (&r, &x, 4);
1160 #else
1161 /* emulation, only works for normals and subnormals and +0 */
1162 int neg = x >> 31;
1163 int e = (x >> 23) & 0xffU;
1164
1165 x &= 0x7fffffU;
1166
1167 if (e)
1168 x |= 0x800000U;
1169 else
1170 e = 1;
1171
1172 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1173 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1174
1175 r = neg ? -r : r;
1176 #endif
1177
1178 return r;
1179 }
1180
1181 /* convert a double to ieee double/binary64 */
1182 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1183 ecb_function_ uint64_t
1184 ecb_double_to_binary64 (double x)
1185 {
1186 uint64_t r;
1187
1188 #if ECB_STDFP
1189 memcpy (&r, &x, 8);
1190 #else
1191 /* slow emulation, works for anything but -0 */
1192 uint64_t m;
1193 int e;
1194
1195 if (x == 0e0 ) return 0x0000000000000000U;
1196 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1197 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1198 if (x != x ) return 0X7ff7ffffffffffffU;
1199
1200 m = frexp (x, &e) * 0x20000000000000U;
1201
1202 r = m & 0x8000000000000000;;
1203
1204 if (r)
1205 m = -m;
1206
1207 if (e <= -1022)
1208 {
1209 m &= 0x1fffffffffffffU;
1210 m >>= (-1021 - e);
1211 e = -1022;
1212 }
1213
1214 r |= ((uint64_t)(e + 1022)) << 52;
1215 r |= m & 0xfffffffffffffU;
1216 #endif
1217
1218 return r;
1219 }
1220
1221 /* converts an ieee double/binary64 to a double */
1222 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1223 ecb_function_ double
1224 ecb_binary64_to_double (uint64_t x)
1225 {
1226 double r;
1227
1228 #if ECB_STDFP
1229 memcpy (&r, &x, 8);
1230 #else
1231 /* emulation, only works for normals and subnormals and +0 */
1232 int neg = x >> 63;
1233 int e = (x >> 52) & 0x7ffU;
1234
1235 x &= 0xfffffffffffffU;
1236
1237 if (e)
1238 x |= 0x10000000000000U;
1239 else
1240 e = 1;
1241
1242 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1243 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1244
1245 r = neg ? -r : r;
1246 #endif
1247
1248 return r;
1249 }
1250
1251#endif
1252
1253#endif
1254
1255/* ECB.H END */
1256
1257#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1258/* if your architecture doesn't need memory fences, e.g. because it is
1259 * single-cpu/core, or if you use libev in a project that doesn't use libev
1260 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1261 * libev, in which cases the memory fences become nops.
1262 * alternatively, you can remove this #error and link against libpthread,
1263 * which will then provide the memory fences.
1264 */
1265# error "memory fences not defined for your architecture, please report"
1266#endif
1267
1268#ifndef ECB_MEMORY_FENCE
1269# define ECB_MEMORY_FENCE do { } while (0)
1270# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1271# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1272#endif
1273
1274#define expect_false(cond) ecb_expect_false (cond)
1275#define expect_true(cond) ecb_expect_true (cond)
1276#define noinline ecb_noinline
1277
490#define inline_size static inline 1278#define inline_size ecb_inline
491 1279
492#if EV_FEATURE_CODE 1280#if EV_FEATURE_CODE
493# define inline_speed static inline 1281# define inline_speed ecb_inline
494#else 1282#else
495# define inline_speed static noinline 1283# define inline_speed static noinline
496#endif 1284#endif
497 1285
498#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1286#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
537# include "ev_win32.c" 1325# include "ev_win32.c"
538#endif 1326#endif
539 1327
540/*****************************************************************************/ 1328/*****************************************************************************/
541 1329
1330/* define a suitable floor function (only used by periodics atm) */
1331
1332#if EV_USE_FLOOR
1333# include <math.h>
1334# define ev_floor(v) floor (v)
1335#else
1336
1337#include <float.h>
1338
1339/* a floor() replacement function, should be independent of ev_tstamp type */
1340static ev_tstamp noinline
1341ev_floor (ev_tstamp v)
1342{
1343 /* the choice of shift factor is not terribly important */
1344#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1345 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1346#else
1347 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1348#endif
1349
1350 /* argument too large for an unsigned long? */
1351 if (expect_false (v >= shift))
1352 {
1353 ev_tstamp f;
1354
1355 if (v == v - 1.)
1356 return v; /* very large number */
1357
1358 f = shift * ev_floor (v * (1. / shift));
1359 return f + ev_floor (v - f);
1360 }
1361
1362 /* special treatment for negative args? */
1363 if (expect_false (v < 0.))
1364 {
1365 ev_tstamp f = -ev_floor (-v);
1366
1367 return f - (f == v ? 0 : 1);
1368 }
1369
1370 /* fits into an unsigned long */
1371 return (unsigned long)v;
1372}
1373
1374#endif
1375
1376/*****************************************************************************/
1377
1378#ifdef __linux
1379# include <sys/utsname.h>
1380#endif
1381
1382static unsigned int noinline ecb_cold
1383ev_linux_version (void)
1384{
1385#ifdef __linux
1386 unsigned int v = 0;
1387 struct utsname buf;
1388 int i;
1389 char *p = buf.release;
1390
1391 if (uname (&buf))
1392 return 0;
1393
1394 for (i = 3+1; --i; )
1395 {
1396 unsigned int c = 0;
1397
1398 for (;;)
1399 {
1400 if (*p >= '0' && *p <= '9')
1401 c = c * 10 + *p++ - '0';
1402 else
1403 {
1404 p += *p == '.';
1405 break;
1406 }
1407 }
1408
1409 v = (v << 8) | c;
1410 }
1411
1412 return v;
1413#else
1414 return 0;
1415#endif
1416}
1417
1418/*****************************************************************************/
1419
542#if EV_AVOID_STDIO 1420#if EV_AVOID_STDIO
543static void noinline 1421static void noinline ecb_cold
544ev_printerr (const char *msg) 1422ev_printerr (const char *msg)
545{ 1423{
546 write (STDERR_FILENO, msg, strlen (msg)); 1424 write (STDERR_FILENO, msg, strlen (msg));
547} 1425}
548#endif 1426#endif
549 1427
550static void (*syserr_cb)(const char *msg); 1428static void (*syserr_cb)(const char *msg) EV_THROW;
551 1429
552void 1430void ecb_cold
553ev_set_syserr_cb (void (*cb)(const char *msg)) 1431ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
554{ 1432{
555 syserr_cb = cb; 1433 syserr_cb = cb;
556} 1434}
557 1435
558static void noinline 1436static void noinline ecb_cold
559ev_syserr (const char *msg) 1437ev_syserr (const char *msg)
560{ 1438{
561 if (!msg) 1439 if (!msg)
562 msg = "(libev) system error"; 1440 msg = "(libev) system error";
563 1441
564 if (syserr_cb) 1442 if (syserr_cb)
565 syserr_cb (msg); 1443 syserr_cb (msg);
566 else 1444 else
567 { 1445 {
568#if EV_AVOID_STDIO 1446#if EV_AVOID_STDIO
569 const char *err = strerror (errno);
570
571 ev_printerr (msg); 1447 ev_printerr (msg);
572 ev_printerr (": "); 1448 ev_printerr (": ");
573 ev_printerr (err); 1449 ev_printerr (strerror (errno));
574 ev_printerr ("\n"); 1450 ev_printerr ("\n");
575#else 1451#else
576 perror (msg); 1452 perror (msg);
577#endif 1453#endif
578 abort (); 1454 abort ();
579 } 1455 }
580} 1456}
581 1457
582static void * 1458static void *
583ev_realloc_emul (void *ptr, long size) 1459ev_realloc_emul (void *ptr, long size) EV_THROW
584{ 1460{
585#if __GLIBC__
586 return realloc (ptr, size);
587#else
588 /* some systems, notably openbsd and darwin, fail to properly 1461 /* some systems, notably openbsd and darwin, fail to properly
589 * implement realloc (x, 0) (as required by both ansi c-89 and 1462 * implement realloc (x, 0) (as required by both ansi c-89 and
590 * the single unix specification, so work around them here. 1463 * the single unix specification, so work around them here.
1464 * recently, also (at least) fedora and debian started breaking it,
1465 * despite documenting it otherwise.
591 */ 1466 */
592 1467
593 if (size) 1468 if (size)
594 return realloc (ptr, size); 1469 return realloc (ptr, size);
595 1470
596 free (ptr); 1471 free (ptr);
597 return 0; 1472 return 0;
598#endif
599} 1473}
600 1474
601static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1475static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
602 1476
603void 1477void ecb_cold
604ev_set_allocator (void *(*cb)(void *ptr, long size)) 1478ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
605{ 1479{
606 alloc = cb; 1480 alloc = cb;
607} 1481}
608 1482
609inline_speed void * 1483inline_speed void *
… …
612 ptr = alloc (ptr, size); 1486 ptr = alloc (ptr, size);
613 1487
614 if (!ptr && size) 1488 if (!ptr && size)
615 { 1489 {
616#if EV_AVOID_STDIO 1490#if EV_AVOID_STDIO
617 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1491 ev_printerr ("(libev) memory allocation failed, aborting.\n");
618#else 1492#else
619 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1493 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
620#endif 1494#endif
621 abort (); 1495 abort ();
622 } 1496 }
623 1497
624 return ptr; 1498 return ptr;
… …
641 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1515 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
642 unsigned char unused; 1516 unsigned char unused;
643#if EV_USE_EPOLL 1517#if EV_USE_EPOLL
644 unsigned int egen; /* generation counter to counter epoll bugs */ 1518 unsigned int egen; /* generation counter to counter epoll bugs */
645#endif 1519#endif
646#if EV_SELECT_IS_WINSOCKET 1520#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
647 SOCKET handle; 1521 SOCKET handle;
1522#endif
1523#if EV_USE_IOCP
1524 OVERLAPPED or, ow;
648#endif 1525#endif
649} ANFD; 1526} ANFD;
650 1527
651/* stores the pending event set for a given watcher */ 1528/* stores the pending event set for a given watcher */
652typedef struct 1529typedef struct
… …
694 #undef VAR 1571 #undef VAR
695 }; 1572 };
696 #include "ev_wrap.h" 1573 #include "ev_wrap.h"
697 1574
698 static struct ev_loop default_loop_struct; 1575 static struct ev_loop default_loop_struct;
699 struct ev_loop *ev_default_loop_ptr; 1576 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
700 1577
701#else 1578#else
702 1579
703 ev_tstamp ev_rt_now; 1580 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; 1581 #define VAR(name,decl) static decl;
705 #include "ev_vars.h" 1582 #include "ev_vars.h"
706 #undef VAR 1583 #undef VAR
707 1584
708 static int ev_default_loop_ptr; 1585 static int ev_default_loop_ptr;
… …
717# define EV_RELEASE_CB (void)0 1594# define EV_RELEASE_CB (void)0
718# define EV_ACQUIRE_CB (void)0 1595# define EV_ACQUIRE_CB (void)0
719# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1596# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
720#endif 1597#endif
721 1598
722#define EVUNLOOP_RECURSE 0x80 1599#define EVBREAK_RECURSE 0x80
723 1600
724/*****************************************************************************/ 1601/*****************************************************************************/
725 1602
726#ifndef EV_HAVE_EV_TIME 1603#ifndef EV_HAVE_EV_TIME
727ev_tstamp 1604ev_tstamp
728ev_time (void) 1605ev_time (void) EV_THROW
729{ 1606{
730#if EV_USE_REALTIME 1607#if EV_USE_REALTIME
731 if (expect_true (have_realtime)) 1608 if (expect_true (have_realtime))
732 { 1609 {
733 struct timespec ts; 1610 struct timespec ts;
… …
757 return ev_time (); 1634 return ev_time ();
758} 1635}
759 1636
760#if EV_MULTIPLICITY 1637#if EV_MULTIPLICITY
761ev_tstamp 1638ev_tstamp
762ev_now (EV_P) 1639ev_now (EV_P) EV_THROW
763{ 1640{
764 return ev_rt_now; 1641 return ev_rt_now;
765} 1642}
766#endif 1643#endif
767 1644
768void 1645void
769ev_sleep (ev_tstamp delay) 1646ev_sleep (ev_tstamp delay) EV_THROW
770{ 1647{
771 if (delay > 0.) 1648 if (delay > 0.)
772 { 1649 {
773#if EV_USE_NANOSLEEP 1650#if EV_USE_NANOSLEEP
774 struct timespec ts; 1651 struct timespec ts;
775 1652
776 EV_TS_SET (ts, delay); 1653 EV_TS_SET (ts, delay);
777 nanosleep (&ts, 0); 1654 nanosleep (&ts, 0);
778#elif defined(_WIN32) 1655#elif defined _WIN32
779 Sleep ((unsigned long)(delay * 1e3)); 1656 Sleep ((unsigned long)(delay * 1e3));
780#else 1657#else
781 struct timeval tv; 1658 struct timeval tv;
782 1659
783 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1660 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
802 1679
803 do 1680 do
804 ncur <<= 1; 1681 ncur <<= 1;
805 while (cnt > ncur); 1682 while (cnt > ncur);
806 1683
807 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1684 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
808 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1685 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
809 { 1686 {
810 ncur *= elem; 1687 ncur *= elem;
811 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1688 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
812 ncur = ncur - sizeof (void *) * 4; 1689 ncur = ncur - sizeof (void *) * 4;
… …
814 } 1691 }
815 1692
816 return ncur; 1693 return ncur;
817} 1694}
818 1695
819static noinline void * 1696static void * noinline ecb_cold
820array_realloc (int elem, void *base, int *cur, int cnt) 1697array_realloc (int elem, void *base, int *cur, int cnt)
821{ 1698{
822 *cur = array_nextsize (elem, *cur, cnt); 1699 *cur = array_nextsize (elem, *cur, cnt);
823 return ev_realloc (base, elem * *cur); 1700 return ev_realloc (base, elem * *cur);
824} 1701}
… …
827 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1704 memset ((void *)(base), 0, sizeof (*(base)) * (count))
828 1705
829#define array_needsize(type,base,cur,cnt,init) \ 1706#define array_needsize(type,base,cur,cnt,init) \
830 if (expect_false ((cnt) > (cur))) \ 1707 if (expect_false ((cnt) > (cur))) \
831 { \ 1708 { \
832 int ocur_ = (cur); \ 1709 int ecb_unused ocur_ = (cur); \
833 (base) = (type *)array_realloc \ 1710 (base) = (type *)array_realloc \
834 (sizeof (type), (base), &(cur), (cnt)); \ 1711 (sizeof (type), (base), &(cur), (cnt)); \
835 init ((base) + (ocur_), (cur) - ocur_); \ 1712 init ((base) + (ocur_), (cur) - ocur_); \
836 } 1713 }
837 1714
… …
855pendingcb (EV_P_ ev_prepare *w, int revents) 1732pendingcb (EV_P_ ev_prepare *w, int revents)
856{ 1733{
857} 1734}
858 1735
859void noinline 1736void noinline
860ev_feed_event (EV_P_ void *w, int revents) 1737ev_feed_event (EV_P_ void *w, int revents) EV_THROW
861{ 1738{
862 W w_ = (W)w; 1739 W w_ = (W)w;
863 int pri = ABSPRI (w_); 1740 int pri = ABSPRI (w_);
864 1741
865 if (expect_false (w_->pending)) 1742 if (expect_false (w_->pending))
… …
869 w_->pending = ++pendingcnt [pri]; 1746 w_->pending = ++pendingcnt [pri];
870 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1747 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
871 pendings [pri][w_->pending - 1].w = w_; 1748 pendings [pri][w_->pending - 1].w = w_;
872 pendings [pri][w_->pending - 1].events = revents; 1749 pendings [pri][w_->pending - 1].events = revents;
873 } 1750 }
1751
1752 pendingpri = NUMPRI - 1;
874} 1753}
875 1754
876inline_speed void 1755inline_speed void
877feed_reverse (EV_P_ W w) 1756feed_reverse (EV_P_ W w)
878{ 1757{
… …
924 if (expect_true (!anfd->reify)) 1803 if (expect_true (!anfd->reify))
925 fd_event_nocheck (EV_A_ fd, revents); 1804 fd_event_nocheck (EV_A_ fd, revents);
926} 1805}
927 1806
928void 1807void
929ev_feed_fd_event (EV_P_ int fd, int revents) 1808ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
930{ 1809{
931 if (fd >= 0 && fd < anfdmax) 1810 if (fd >= 0 && fd < anfdmax)
932 fd_event_nocheck (EV_A_ fd, revents); 1811 fd_event_nocheck (EV_A_ fd, revents);
933} 1812}
934 1813
… …
937inline_size void 1816inline_size void
938fd_reify (EV_P) 1817fd_reify (EV_P)
939{ 1818{
940 int i; 1819 int i;
941 1820
1821#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1822 for (i = 0; i < fdchangecnt; ++i)
1823 {
1824 int fd = fdchanges [i];
1825 ANFD *anfd = anfds + fd;
1826
1827 if (anfd->reify & EV__IOFDSET && anfd->head)
1828 {
1829 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1830
1831 if (handle != anfd->handle)
1832 {
1833 unsigned long arg;
1834
1835 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1836
1837 /* handle changed, but fd didn't - we need to do it in two steps */
1838 backend_modify (EV_A_ fd, anfd->events, 0);
1839 anfd->events = 0;
1840 anfd->handle = handle;
1841 }
1842 }
1843 }
1844#endif
1845
942 for (i = 0; i < fdchangecnt; ++i) 1846 for (i = 0; i < fdchangecnt; ++i)
943 { 1847 {
944 int fd = fdchanges [i]; 1848 int fd = fdchanges [i];
945 ANFD *anfd = anfds + fd; 1849 ANFD *anfd = anfds + fd;
946 ev_io *w; 1850 ev_io *w;
… …
948 unsigned char o_events = anfd->events; 1852 unsigned char o_events = anfd->events;
949 unsigned char o_reify = anfd->reify; 1853 unsigned char o_reify = anfd->reify;
950 1854
951 anfd->reify = 0; 1855 anfd->reify = 0;
952 1856
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 */ 1857 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
963 { 1858 {
964 anfd->events = 0; 1859 anfd->events = 0;
965 1860
966 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1861 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
967 anfd->events |= (unsigned char)w->events; 1862 anfd->events |= (unsigned char)w->events;
968 1863
969 if (o_events !=anfd-> events) 1864 if (o_events != anfd->events)
970 o_reify = EV__IOFDSET; /* actually |= */ 1865 o_reify = EV__IOFDSET; /* actually |= */
971 } 1866 }
972 1867
973 if (o_reify & EV__IOFDSET) 1868 if (o_reify & EV__IOFDSET)
974 backend_modify (EV_A_ fd, o_events, anfd->events); 1869 backend_modify (EV_A_ fd, o_events, anfd->events);
… …
991 fdchanges [fdchangecnt - 1] = fd; 1886 fdchanges [fdchangecnt - 1] = fd;
992 } 1887 }
993} 1888}
994 1889
995/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1890/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
996inline_speed void 1891inline_speed void ecb_cold
997fd_kill (EV_P_ int fd) 1892fd_kill (EV_P_ int fd)
998{ 1893{
999 ev_io *w; 1894 ev_io *w;
1000 1895
1001 while ((w = (ev_io *)anfds [fd].head)) 1896 while ((w = (ev_io *)anfds [fd].head))
… …
1004 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1899 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1005 } 1900 }
1006} 1901}
1007 1902
1008/* check whether the given fd is actually valid, for error recovery */ 1903/* check whether the given fd is actually valid, for error recovery */
1009inline_size int 1904inline_size int ecb_cold
1010fd_valid (int fd) 1905fd_valid (int fd)
1011{ 1906{
1012#ifdef _WIN32 1907#ifdef _WIN32
1013 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1908 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1014#else 1909#else
1015 return fcntl (fd, F_GETFD) != -1; 1910 return fcntl (fd, F_GETFD) != -1;
1016#endif 1911#endif
1017} 1912}
1018 1913
1019/* called on EBADF to verify fds */ 1914/* called on EBADF to verify fds */
1020static void noinline 1915static void noinline ecb_cold
1021fd_ebadf (EV_P) 1916fd_ebadf (EV_P)
1022{ 1917{
1023 int fd; 1918 int fd;
1024 1919
1025 for (fd = 0; fd < anfdmax; ++fd) 1920 for (fd = 0; fd < anfdmax; ++fd)
… …
1027 if (!fd_valid (fd) && errno == EBADF) 1922 if (!fd_valid (fd) && errno == EBADF)
1028 fd_kill (EV_A_ fd); 1923 fd_kill (EV_A_ fd);
1029} 1924}
1030 1925
1031/* called on ENOMEM in select/poll to kill some fds and retry */ 1926/* called on ENOMEM in select/poll to kill some fds and retry */
1032static void noinline 1927static void noinline ecb_cold
1033fd_enomem (EV_P) 1928fd_enomem (EV_P)
1034{ 1929{
1035 int fd; 1930 int fd;
1036 1931
1037 for (fd = anfdmax; fd--; ) 1932 for (fd = anfdmax; fd--; )
… …
1232 2127
1233/*****************************************************************************/ 2128/*****************************************************************************/
1234 2129
1235#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2130#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1236 2131
1237static void noinline 2132static void noinline ecb_cold
1238evpipe_init (EV_P) 2133evpipe_init (EV_P)
1239{ 2134{
1240 if (!ev_is_active (&pipe_w)) 2135 if (!ev_is_active (&pipe_w))
1241 { 2136 {
2137 int fds [2];
2138
1242# if EV_USE_EVENTFD 2139# if EV_USE_EVENTFD
2140 fds [0] = -1;
1243 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2141 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1244 if (evfd < 0 && errno == EINVAL) 2142 if (fds [1] < 0 && errno == EINVAL)
1245 evfd = eventfd (0, 0); 2143 fds [1] = eventfd (0, 0);
1246 2144
1247 if (evfd >= 0) 2145 if (fds [1] < 0)
2146# endif
1248 { 2147 {
2148 while (pipe (fds))
2149 ev_syserr ("(libev) error creating signal/async pipe");
2150
2151 fd_intern (fds [0]);
2152 }
2153
1249 evpipe [0] = -1; 2154 evpipe [0] = fds [0];
1250 fd_intern (evfd); /* doing it twice doesn't hurt */ 2155
1251 ev_io_set (&pipe_w, evfd, EV_READ); 2156 if (evpipe [1] < 0)
2157 evpipe [1] = fds [1]; /* first call, set write fd */
2158 else
2159 {
2160 /* on subsequent calls, do not change evpipe [1] */
2161 /* so that evpipe_write can always rely on its value. */
2162 /* this branch does not do anything sensible on windows, */
2163 /* so must not be executed on windows */
2164
2165 dup2 (fds [1], evpipe [1]);
2166 close (fds [1]);
2167 }
2168
2169 fd_intern (evpipe [1]);
2170
2171 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2172 ev_io_start (EV_A_ &pipe_w);
2173 ev_unref (EV_A); /* watcher should not keep loop alive */
2174 }
2175}
2176
2177inline_speed void
2178evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2179{
2180 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2181
2182 if (expect_true (*flag))
2183 return;
2184
2185 *flag = 1;
2186 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2187
2188 pipe_write_skipped = 1;
2189
2190 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2191
2192 if (pipe_write_wanted)
2193 {
2194 int old_errno;
2195
2196 pipe_write_skipped = 0;
2197 ECB_MEMORY_FENCE_RELEASE;
2198
2199 old_errno = errno; /* save errno because write will clobber it */
2200
2201#if EV_USE_EVENTFD
2202 if (evpipe [0] < 0)
2203 {
2204 uint64_t counter = 1;
2205 write (evpipe [1], &counter, sizeof (uint64_t));
1252 } 2206 }
1253 else 2207 else
1254# endif 2208#endif
1255 { 2209 {
1256 while (pipe (evpipe)) 2210#ifdef _WIN32
1257 ev_syserr ("(libev) error creating signal/async pipe"); 2211 WSABUF buf;
1258 2212 DWORD sent;
1259 fd_intern (evpipe [0]); 2213 buf.buf = &buf;
1260 fd_intern (evpipe [1]); 2214 buf.len = 1;
1261 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2215 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2216#else
2217 write (evpipe [1], &(evpipe [1]), 1);
2218#endif
1262 } 2219 }
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 2220
1294 errno = old_errno; 2221 errno = old_errno;
1295 } 2222 }
1296} 2223}
1297 2224
… …
1300static void 2227static void
1301pipecb (EV_P_ ev_io *iow, int revents) 2228pipecb (EV_P_ ev_io *iow, int revents)
1302{ 2229{
1303 int i; 2230 int i;
1304 2231
2232 if (revents & EV_READ)
2233 {
1305#if EV_USE_EVENTFD 2234#if EV_USE_EVENTFD
1306 if (evfd >= 0) 2235 if (evpipe [0] < 0)
1307 { 2236 {
1308 uint64_t counter; 2237 uint64_t counter;
1309 read (evfd, &counter, sizeof (uint64_t)); 2238 read (evpipe [1], &counter, sizeof (uint64_t));
1310 } 2239 }
1311 else 2240 else
1312#endif 2241#endif
1313 { 2242 {
1314 char dummy; 2243 char dummy[4];
1315 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2244#ifdef _WIN32
2245 WSABUF buf;
2246 DWORD recvd;
2247 DWORD flags = 0;
2248 buf.buf = dummy;
2249 buf.len = sizeof (dummy);
2250 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2251#else
1316 read (evpipe [0], &dummy, 1); 2252 read (evpipe [0], &dummy, sizeof (dummy));
2253#endif
2254 }
1317 } 2255 }
1318 2256
2257 pipe_write_skipped = 0;
2258
2259 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2260
2261#if EV_SIGNAL_ENABLE
1319 if (sig_pending) 2262 if (sig_pending)
1320 { 2263 {
1321 sig_pending = 0; 2264 sig_pending = 0;
2265
2266 ECB_MEMORY_FENCE;
1322 2267
1323 for (i = EV_NSIG - 1; i--; ) 2268 for (i = EV_NSIG - 1; i--; )
1324 if (expect_false (signals [i].pending)) 2269 if (expect_false (signals [i].pending))
1325 ev_feed_signal_event (EV_A_ i + 1); 2270 ev_feed_signal_event (EV_A_ i + 1);
1326 } 2271 }
2272#endif
1327 2273
1328#if EV_ASYNC_ENABLE 2274#if EV_ASYNC_ENABLE
1329 if (async_pending) 2275 if (async_pending)
1330 { 2276 {
1331 async_pending = 0; 2277 async_pending = 0;
2278
2279 ECB_MEMORY_FENCE;
1332 2280
1333 for (i = asynccnt; i--; ) 2281 for (i = asynccnt; i--; )
1334 if (asyncs [i]->sent) 2282 if (asyncs [i]->sent)
1335 { 2283 {
1336 asyncs [i]->sent = 0; 2284 asyncs [i]->sent = 0;
2285 ECB_MEMORY_FENCE_RELEASE;
1337 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2286 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1338 } 2287 }
1339 } 2288 }
1340#endif 2289#endif
1341} 2290}
1342 2291
1343/*****************************************************************************/ 2292/*****************************************************************************/
1344 2293
2294void
2295ev_feed_signal (int signum) EV_THROW
2296{
2297#if EV_MULTIPLICITY
2298 EV_P;
2299 ECB_MEMORY_FENCE_ACQUIRE;
2300 EV_A = signals [signum - 1].loop;
2301
2302 if (!EV_A)
2303 return;
2304#endif
2305
2306 signals [signum - 1].pending = 1;
2307 evpipe_write (EV_A_ &sig_pending);
2308}
2309
1345static void 2310static void
1346ev_sighandler (int signum) 2311ev_sighandler (int signum)
1347{ 2312{
1348#if EV_MULTIPLICITY
1349 EV_P = signals [signum - 1].loop;
1350#endif
1351
1352#ifdef _WIN32 2313#ifdef _WIN32
1353 signal (signum, ev_sighandler); 2314 signal (signum, ev_sighandler);
1354#endif 2315#endif
1355 2316
1356 signals [signum - 1].pending = 1; 2317 ev_feed_signal (signum);
1357 evpipe_write (EV_A_ &sig_pending);
1358} 2318}
1359 2319
1360void noinline 2320void noinline
1361ev_feed_signal_event (EV_P_ int signum) 2321ev_feed_signal_event (EV_P_ int signum) EV_THROW
1362{ 2322{
1363 WL w; 2323 WL w;
1364 2324
1365 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2325 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1366 return; 2326 return;
1367 2327
1368 --signum; 2328 --signum;
1369 2329
1370#if EV_MULTIPLICITY 2330#if EV_MULTIPLICITY
… …
1374 if (expect_false (signals [signum].loop != EV_A)) 2334 if (expect_false (signals [signum].loop != EV_A))
1375 return; 2335 return;
1376#endif 2336#endif
1377 2337
1378 signals [signum].pending = 0; 2338 signals [signum].pending = 0;
2339 ECB_MEMORY_FENCE_RELEASE;
1379 2340
1380 for (w = signals [signum].head; w; w = w->next) 2341 for (w = signals [signum].head; w; w = w->next)
1381 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2342 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1382} 2343}
1383 2344
… …
1462 2423
1463#endif 2424#endif
1464 2425
1465/*****************************************************************************/ 2426/*****************************************************************************/
1466 2427
2428#if EV_USE_IOCP
2429# include "ev_iocp.c"
2430#endif
1467#if EV_USE_PORT 2431#if EV_USE_PORT
1468# include "ev_port.c" 2432# include "ev_port.c"
1469#endif 2433#endif
1470#if EV_USE_KQUEUE 2434#if EV_USE_KQUEUE
1471# include "ev_kqueue.c" 2435# include "ev_kqueue.c"
… …
1478#endif 2442#endif
1479#if EV_USE_SELECT 2443#if EV_USE_SELECT
1480# include "ev_select.c" 2444# include "ev_select.c"
1481#endif 2445#endif
1482 2446
1483int 2447int ecb_cold
1484ev_version_major (void) 2448ev_version_major (void) EV_THROW
1485{ 2449{
1486 return EV_VERSION_MAJOR; 2450 return EV_VERSION_MAJOR;
1487} 2451}
1488 2452
1489int 2453int ecb_cold
1490ev_version_minor (void) 2454ev_version_minor (void) EV_THROW
1491{ 2455{
1492 return EV_VERSION_MINOR; 2456 return EV_VERSION_MINOR;
1493} 2457}
1494 2458
1495/* return true if we are running with elevated privileges and should ignore env variables */ 2459/* return true if we are running with elevated privileges and should ignore env variables */
1496int inline_size 2460int inline_size ecb_cold
1497enable_secure (void) 2461enable_secure (void)
1498{ 2462{
1499#ifdef _WIN32 2463#ifdef _WIN32
1500 return 0; 2464 return 0;
1501#else 2465#else
1502 return getuid () != geteuid () 2466 return getuid () != geteuid ()
1503 || getgid () != getegid (); 2467 || getgid () != getegid ();
1504#endif 2468#endif
1505} 2469}
1506 2470
1507unsigned int 2471unsigned int ecb_cold
1508ev_supported_backends (void) 2472ev_supported_backends (void) EV_THROW
1509{ 2473{
1510 unsigned int flags = 0; 2474 unsigned int flags = 0;
1511 2475
1512 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2476 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1513 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2477 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1516 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2480 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1517 2481
1518 return flags; 2482 return flags;
1519} 2483}
1520 2484
1521unsigned int 2485unsigned int ecb_cold
1522ev_recommended_backends (void) 2486ev_recommended_backends (void) EV_THROW
1523{ 2487{
1524 unsigned int flags = ev_supported_backends (); 2488 unsigned int flags = ev_supported_backends ();
1525 2489
1526#ifndef __NetBSD__ 2490#ifndef __NetBSD__
1527 /* kqueue is borked on everything but netbsd apparently */ 2491 /* kqueue is borked on everything but netbsd apparently */
… …
1538#endif 2502#endif
1539 2503
1540 return flags; 2504 return flags;
1541} 2505}
1542 2506
2507unsigned int ecb_cold
2508ev_embeddable_backends (void) EV_THROW
2509{
2510 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2511
2512 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2513 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2514 flags &= ~EVBACKEND_EPOLL;
2515
2516 return flags;
2517}
2518
1543unsigned int 2519unsigned 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) 2520ev_backend (EV_P) EV_THROW
1557{ 2521{
1558 return backend; 2522 return backend;
1559} 2523}
1560 2524
1561#if EV_FEATURE_API 2525#if EV_FEATURE_API
1562unsigned int 2526unsigned int
1563ev_iteration (EV_P) 2527ev_iteration (EV_P) EV_THROW
1564{ 2528{
1565 return loop_count; 2529 return loop_count;
1566} 2530}
1567 2531
1568unsigned int 2532unsigned int
1569ev_depth (EV_P) 2533ev_depth (EV_P) EV_THROW
1570{ 2534{
1571 return loop_depth; 2535 return loop_depth;
1572} 2536}
1573 2537
1574void 2538void
1575ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2539ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1576{ 2540{
1577 io_blocktime = interval; 2541 io_blocktime = interval;
1578} 2542}
1579 2543
1580void 2544void
1581ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2545ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1582{ 2546{
1583 timeout_blocktime = interval; 2547 timeout_blocktime = interval;
1584} 2548}
1585 2549
1586void 2550void
1587ev_set_userdata (EV_P_ void *data) 2551ev_set_userdata (EV_P_ void *data) EV_THROW
1588{ 2552{
1589 userdata = data; 2553 userdata = data;
1590} 2554}
1591 2555
1592void * 2556void *
1593ev_userdata (EV_P) 2557ev_userdata (EV_P) EV_THROW
1594{ 2558{
1595 return userdata; 2559 return userdata;
1596} 2560}
1597 2561
2562void
1598void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2563ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
1599{ 2564{
1600 invoke_cb = invoke_pending_cb; 2565 invoke_cb = invoke_pending_cb;
1601} 2566}
1602 2567
1603void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2568void
2569ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
1604{ 2570{
1605 release_cb = release; 2571 release_cb = release;
1606 acquire_cb = acquire; 2572 acquire_cb = acquire;
1607} 2573}
1608#endif 2574#endif
1609 2575
1610/* initialise a loop structure, must be zero-initialised */ 2576/* initialise a loop structure, must be zero-initialised */
1611static void noinline 2577static void noinline ecb_cold
1612loop_init (EV_P_ unsigned int flags) 2578loop_init (EV_P_ unsigned int flags) EV_THROW
1613{ 2579{
1614 if (!backend) 2580 if (!backend)
1615 { 2581 {
2582 origflags = flags;
2583
1616#if EV_USE_REALTIME 2584#if EV_USE_REALTIME
1617 if (!have_realtime) 2585 if (!have_realtime)
1618 { 2586 {
1619 struct timespec ts; 2587 struct timespec ts;
1620 2588
… …
1642 if (!(flags & EVFLAG_NOENV) 2610 if (!(flags & EVFLAG_NOENV)
1643 && !enable_secure () 2611 && !enable_secure ()
1644 && getenv ("LIBEV_FLAGS")) 2612 && getenv ("LIBEV_FLAGS"))
1645 flags = atoi (getenv ("LIBEV_FLAGS")); 2613 flags = atoi (getenv ("LIBEV_FLAGS"));
1646 2614
1647 ev_rt_now = ev_time (); 2615 ev_rt_now = ev_time ();
1648 mn_now = get_clock (); 2616 mn_now = get_clock ();
1649 now_floor = mn_now; 2617 now_floor = mn_now;
1650 rtmn_diff = ev_rt_now - mn_now; 2618 rtmn_diff = ev_rt_now - mn_now;
1651#if EV_FEATURE_API 2619#if EV_FEATURE_API
1652 invoke_cb = ev_invoke_pending; 2620 invoke_cb = ev_invoke_pending;
1653#endif 2621#endif
1654 2622
1655 io_blocktime = 0.; 2623 io_blocktime = 0.;
1656 timeout_blocktime = 0.; 2624 timeout_blocktime = 0.;
1657 backend = 0; 2625 backend = 0;
1658 backend_fd = -1; 2626 backend_fd = -1;
1659 sig_pending = 0; 2627 sig_pending = 0;
1660#if EV_ASYNC_ENABLE 2628#if EV_ASYNC_ENABLE
1661 async_pending = 0; 2629 async_pending = 0;
1662#endif 2630#endif
2631 pipe_write_skipped = 0;
2632 pipe_write_wanted = 0;
2633 evpipe [0] = -1;
2634 evpipe [1] = -1;
1663#if EV_USE_INOTIFY 2635#if EV_USE_INOTIFY
1664 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2636 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1665#endif 2637#endif
1666#if EV_USE_SIGNALFD 2638#if EV_USE_SIGNALFD
1667 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2639 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1668#endif 2640#endif
1669 2641
1670 if (!(flags & 0x0000ffffU)) 2642 if (!(flags & EVBACKEND_MASK))
1671 flags |= ev_recommended_backends (); 2643 flags |= ev_recommended_backends ();
1672 2644
2645#if EV_USE_IOCP
2646 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2647#endif
1673#if EV_USE_PORT 2648#if EV_USE_PORT
1674 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2649 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1675#endif 2650#endif
1676#if EV_USE_KQUEUE 2651#if EV_USE_KQUEUE
1677 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2652 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1694#endif 2669#endif
1695 } 2670 }
1696} 2671}
1697 2672
1698/* free up a loop structure */ 2673/* free up a loop structure */
1699static void noinline 2674void ecb_cold
1700loop_destroy (EV_P) 2675ev_loop_destroy (EV_P)
1701{ 2676{
1702 int i; 2677 int i;
2678
2679#if EV_MULTIPLICITY
2680 /* mimic free (0) */
2681 if (!EV_A)
2682 return;
2683#endif
2684
2685#if EV_CLEANUP_ENABLE
2686 /* queue cleanup watchers (and execute them) */
2687 if (expect_false (cleanupcnt))
2688 {
2689 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2690 EV_INVOKE_PENDING;
2691 }
2692#endif
2693
2694#if EV_CHILD_ENABLE
2695 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2696 {
2697 ev_ref (EV_A); /* child watcher */
2698 ev_signal_stop (EV_A_ &childev);
2699 }
2700#endif
1703 2701
1704 if (ev_is_active (&pipe_w)) 2702 if (ev_is_active (&pipe_w))
1705 { 2703 {
1706 /*ev_ref (EV_A);*/ 2704 /*ev_ref (EV_A);*/
1707 /*ev_io_stop (EV_A_ &pipe_w);*/ 2705 /*ev_io_stop (EV_A_ &pipe_w);*/
1708 2706
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]); 2707 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1717 EV_WIN32_CLOSE_FD (evpipe [1]); 2708 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1718 }
1719 } 2709 }
1720 2710
1721#if EV_USE_SIGNALFD 2711#if EV_USE_SIGNALFD
1722 if (ev_is_active (&sigfd_w)) 2712 if (ev_is_active (&sigfd_w))
1723 close (sigfd); 2713 close (sigfd);
… …
1729#endif 2719#endif
1730 2720
1731 if (backend_fd >= 0) 2721 if (backend_fd >= 0)
1732 close (backend_fd); 2722 close (backend_fd);
1733 2723
2724#if EV_USE_IOCP
2725 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2726#endif
1734#if EV_USE_PORT 2727#if EV_USE_PORT
1735 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2728 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1736#endif 2729#endif
1737#if EV_USE_KQUEUE 2730#if EV_USE_KQUEUE
1738 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2731 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1765 array_free (periodic, EMPTY); 2758 array_free (periodic, EMPTY);
1766#endif 2759#endif
1767#if EV_FORK_ENABLE 2760#if EV_FORK_ENABLE
1768 array_free (fork, EMPTY); 2761 array_free (fork, EMPTY);
1769#endif 2762#endif
2763#if EV_CLEANUP_ENABLE
2764 array_free (cleanup, EMPTY);
2765#endif
1770 array_free (prepare, EMPTY); 2766 array_free (prepare, EMPTY);
1771 array_free (check, EMPTY); 2767 array_free (check, EMPTY);
1772#if EV_ASYNC_ENABLE 2768#if EV_ASYNC_ENABLE
1773 array_free (async, EMPTY); 2769 array_free (async, EMPTY);
1774#endif 2770#endif
1775 2771
1776 backend = 0; 2772 backend = 0;
2773
2774#if EV_MULTIPLICITY
2775 if (ev_is_default_loop (EV_A))
2776#endif
2777 ev_default_loop_ptr = 0;
2778#if EV_MULTIPLICITY
2779 else
2780 ev_free (EV_A);
2781#endif
1777} 2782}
1778 2783
1779#if EV_USE_INOTIFY 2784#if EV_USE_INOTIFY
1780inline_size void infy_fork (EV_P); 2785inline_size void infy_fork (EV_P);
1781#endif 2786#endif
… …
1794#endif 2799#endif
1795#if EV_USE_INOTIFY 2800#if EV_USE_INOTIFY
1796 infy_fork (EV_A); 2801 infy_fork (EV_A);
1797#endif 2802#endif
1798 2803
2804#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1799 if (ev_is_active (&pipe_w)) 2805 if (ev_is_active (&pipe_w))
1800 { 2806 {
1801 /* this "locks" the handlers against writing to the pipe */ 2807 /* 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 2808
1808 ev_ref (EV_A); 2809 ev_ref (EV_A);
1809 ev_io_stop (EV_A_ &pipe_w); 2810 ev_io_stop (EV_A_ &pipe_w);
1810 2811
1811#if EV_USE_EVENTFD
1812 if (evfd >= 0)
1813 close (evfd);
1814#endif
1815
1816 if (evpipe [0] >= 0) 2812 if (evpipe [0] >= 0)
1817 {
1818 EV_WIN32_CLOSE_FD (evpipe [0]); 2813 EV_WIN32_CLOSE_FD (evpipe [0]);
1819 EV_WIN32_CLOSE_FD (evpipe [1]);
1820 }
1821 2814
1822#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1823 evpipe_init (EV_A); 2815 evpipe_init (EV_A);
1824 /* now iterate over everything, in case we missed something */ 2816 /* iterate over everything, in case we missed something before */
1825 pipecb (EV_A_ &pipe_w, EV_READ); 2817 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1826#endif
1827 } 2818 }
2819#endif
1828 2820
1829 postfork = 0; 2821 postfork = 0;
1830} 2822}
1831 2823
1832#if EV_MULTIPLICITY 2824#if EV_MULTIPLICITY
1833 2825
1834struct ev_loop * 2826struct ev_loop * ecb_cold
1835ev_loop_new (unsigned int flags) 2827ev_loop_new (unsigned int flags) EV_THROW
1836{ 2828{
1837 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2829 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1838 2830
1839 memset (EV_A, 0, sizeof (struct ev_loop)); 2831 memset (EV_A, 0, sizeof (struct ev_loop));
1840 loop_init (EV_A_ flags); 2832 loop_init (EV_A_ flags);
1841 2833
1842 if (ev_backend (EV_A)) 2834 if (ev_backend (EV_A))
1843 return EV_A; 2835 return EV_A;
1844 2836
2837 ev_free (EV_A);
1845 return 0; 2838 return 0;
1846} 2839}
1847 2840
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 */ 2841#endif /* multiplicity */
1861 2842
1862#if EV_VERIFY 2843#if EV_VERIFY
1863static void noinline 2844static void noinline ecb_cold
1864verify_watcher (EV_P_ W w) 2845verify_watcher (EV_P_ W w)
1865{ 2846{
1866 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2847 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1867 2848
1868 if (w->pending) 2849 if (w->pending)
1869 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2850 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1870} 2851}
1871 2852
1872static void noinline 2853static void noinline ecb_cold
1873verify_heap (EV_P_ ANHE *heap, int N) 2854verify_heap (EV_P_ ANHE *heap, int N)
1874{ 2855{
1875 int i; 2856 int i;
1876 2857
1877 for (i = HEAP0; i < N + HEAP0; ++i) 2858 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1882 2863
1883 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2864 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1884 } 2865 }
1885} 2866}
1886 2867
1887static void noinline 2868static void noinline ecb_cold
1888array_verify (EV_P_ W *ws, int cnt) 2869array_verify (EV_P_ W *ws, int cnt)
1889{ 2870{
1890 while (cnt--) 2871 while (cnt--)
1891 { 2872 {
1892 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2873 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1894 } 2875 }
1895} 2876}
1896#endif 2877#endif
1897 2878
1898#if EV_FEATURE_API 2879#if EV_FEATURE_API
1899void 2880void ecb_cold
1900ev_verify (EV_P) 2881ev_verify (EV_P) EV_THROW
1901{ 2882{
1902#if EV_VERIFY 2883#if EV_VERIFY
1903 int i; 2884 int i;
1904 WL w; 2885 WL w, w2;
1905 2886
1906 assert (activecnt >= -1); 2887 assert (activecnt >= -1);
1907 2888
1908 assert (fdchangemax >= fdchangecnt); 2889 assert (fdchangemax >= fdchangecnt);
1909 for (i = 0; i < fdchangecnt; ++i) 2890 for (i = 0; i < fdchangecnt; ++i)
1910 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2891 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1911 2892
1912 assert (anfdmax >= 0); 2893 assert (anfdmax >= 0);
1913 for (i = 0; i < anfdmax; ++i) 2894 for (i = 0; i < anfdmax; ++i)
2895 {
2896 int j = 0;
2897
1914 for (w = anfds [i].head; w; w = w->next) 2898 for (w = w2 = anfds [i].head; w; w = w->next)
1915 { 2899 {
1916 verify_watcher (EV_A_ (W)w); 2900 verify_watcher (EV_A_ (W)w);
2901
2902 if (j++ & 1)
2903 {
2904 assert (("libev: io watcher list contains a loop", w != w2));
2905 w2 = w2->next;
2906 }
2907
1917 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2908 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)); 2909 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1919 } 2910 }
2911 }
1920 2912
1921 assert (timermax >= timercnt); 2913 assert (timermax >= timercnt);
1922 verify_heap (EV_A_ timers, timercnt); 2914 verify_heap (EV_A_ timers, timercnt);
1923 2915
1924#if EV_PERIODIC_ENABLE 2916#if EV_PERIODIC_ENABLE
… …
1939#if EV_FORK_ENABLE 2931#if EV_FORK_ENABLE
1940 assert (forkmax >= forkcnt); 2932 assert (forkmax >= forkcnt);
1941 array_verify (EV_A_ (W *)forks, forkcnt); 2933 array_verify (EV_A_ (W *)forks, forkcnt);
1942#endif 2934#endif
1943 2935
2936#if EV_CLEANUP_ENABLE
2937 assert (cleanupmax >= cleanupcnt);
2938 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2939#endif
2940
1944#if EV_ASYNC_ENABLE 2941#if EV_ASYNC_ENABLE
1945 assert (asyncmax >= asynccnt); 2942 assert (asyncmax >= asynccnt);
1946 array_verify (EV_A_ (W *)asyncs, asynccnt); 2943 array_verify (EV_A_ (W *)asyncs, asynccnt);
1947#endif 2944#endif
1948 2945
… …
1965#endif 2962#endif
1966} 2963}
1967#endif 2964#endif
1968 2965
1969#if EV_MULTIPLICITY 2966#if EV_MULTIPLICITY
1970struct ev_loop * 2967struct ev_loop * ecb_cold
1971ev_default_loop_init (unsigned int flags)
1972#else 2968#else
1973int 2969int
2970#endif
1974ev_default_loop (unsigned int flags) 2971ev_default_loop (unsigned int flags) EV_THROW
1975#endif
1976{ 2972{
1977 if (!ev_default_loop_ptr) 2973 if (!ev_default_loop_ptr)
1978 { 2974 {
1979#if EV_MULTIPLICITY 2975#if EV_MULTIPLICITY
1980 EV_P = ev_default_loop_ptr = &default_loop_struct; 2976 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1999 2995
2000 return ev_default_loop_ptr; 2996 return ev_default_loop_ptr;
2001} 2997}
2002 2998
2003void 2999void
2004ev_default_destroy (void) 3000ev_loop_fork (EV_P) EV_THROW
2005{ 3001{
2006#if EV_MULTIPLICITY 3002 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} 3003}
2029 3004
2030/*****************************************************************************/ 3005/*****************************************************************************/
2031 3006
2032void 3007void
… …
2034{ 3009{
2035 EV_CB_INVOKE ((W)w, revents); 3010 EV_CB_INVOKE ((W)w, revents);
2036} 3011}
2037 3012
2038unsigned int 3013unsigned int
2039ev_pending_count (EV_P) 3014ev_pending_count (EV_P) EV_THROW
2040{ 3015{
2041 int pri; 3016 int pri;
2042 unsigned int count = 0; 3017 unsigned int count = 0;
2043 3018
2044 for (pri = NUMPRI; pri--; ) 3019 for (pri = NUMPRI; pri--; )
… …
2048} 3023}
2049 3024
2050void noinline 3025void noinline
2051ev_invoke_pending (EV_P) 3026ev_invoke_pending (EV_P)
2052{ 3027{
2053 int pri; 3028 pendingpri = NUMPRI;
2054 3029
2055 for (pri = NUMPRI; pri--; ) 3030 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3031 {
3032 --pendingpri;
3033
2056 while (pendingcnt [pri]) 3034 while (pendingcnt [pendingpri])
2057 { 3035 {
2058 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3036 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2059 3037
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; 3038 p->w->pending = 0;
2064 EV_CB_INVOKE (p->w, p->events); 3039 EV_CB_INVOKE (p->w, p->events);
2065 EV_FREQUENT_CHECK; 3040 EV_FREQUENT_CHECK;
2066 } 3041 }
3042 }
2067} 3043}
2068 3044
2069#if EV_IDLE_ENABLE 3045#if EV_IDLE_ENABLE
2070/* make idle watchers pending. this handles the "call-idle */ 3046/* make idle watchers pending. this handles the "call-idle */
2071/* only when higher priorities are idle" logic */ 3047/* only when higher priorities are idle" logic */
… …
2128 feed_reverse_done (EV_A_ EV_TIMER); 3104 feed_reverse_done (EV_A_ EV_TIMER);
2129 } 3105 }
2130} 3106}
2131 3107
2132#if EV_PERIODIC_ENABLE 3108#if EV_PERIODIC_ENABLE
3109
3110static void noinline
3111periodic_recalc (EV_P_ ev_periodic *w)
3112{
3113 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3114 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3115
3116 /* the above almost always errs on the low side */
3117 while (at <= ev_rt_now)
3118 {
3119 ev_tstamp nat = at + w->interval;
3120
3121 /* when resolution fails us, we use ev_rt_now */
3122 if (expect_false (nat == at))
3123 {
3124 at = ev_rt_now;
3125 break;
3126 }
3127
3128 at = nat;
3129 }
3130
3131 ev_at (w) = at;
3132}
3133
2133/* make periodics pending */ 3134/* make periodics pending */
2134inline_size void 3135inline_size void
2135periodics_reify (EV_P) 3136periodics_reify (EV_P)
2136{ 3137{
2137 EV_FREQUENT_CHECK; 3138 EV_FREQUENT_CHECK;
2138 3139
2139 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3140 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2140 { 3141 {
2141 int feed_count = 0;
2142
2143 do 3142 do
2144 { 3143 {
2145 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3144 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2146 3145
2147 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3146 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2156 ANHE_at_cache (periodics [HEAP0]); 3155 ANHE_at_cache (periodics [HEAP0]);
2157 downheap (periodics, periodiccnt, HEAP0); 3156 downheap (periodics, periodiccnt, HEAP0);
2158 } 3157 }
2159 else if (w->interval) 3158 else if (w->interval)
2160 { 3159 {
2161 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3160 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]); 3161 ANHE_at_cache (periodics [HEAP0]);
2176 downheap (periodics, periodiccnt, HEAP0); 3162 downheap (periodics, periodiccnt, HEAP0);
2177 } 3163 }
2178 else 3164 else
2179 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2187 } 3173 }
2188} 3174}
2189 3175
2190/* simply recalculate all periodics */ 3176/* simply recalculate all periodics */
2191/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3177/* TODO: maybe ensure that at least one event happens when jumping forward? */
2192static void noinline 3178static void noinline ecb_cold
2193periodics_reschedule (EV_P) 3179periodics_reschedule (EV_P)
2194{ 3180{
2195 int i; 3181 int i;
2196 3182
2197 /* adjust periodics after time jump */ 3183 /* adjust periodics after time jump */
… …
2200 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2201 3187
2202 if (w->reschedule_cb) 3188 if (w->reschedule_cb)
2203 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3189 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2204 else if (w->interval) 3190 else if (w->interval)
2205 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3191 periodic_recalc (EV_A_ w);
2206 3192
2207 ANHE_at_cache (periodics [i]); 3193 ANHE_at_cache (periodics [i]);
2208 } 3194 }
2209 3195
2210 reheap (periodics, periodiccnt); 3196 reheap (periodics, periodiccnt);
2211} 3197}
2212#endif 3198#endif
2213 3199
2214/* adjust all timers by a given offset */ 3200/* adjust all timers by a given offset */
2215static void noinline 3201static void noinline ecb_cold
2216timers_reschedule (EV_P_ ev_tstamp adjust) 3202timers_reschedule (EV_P_ ev_tstamp adjust)
2217{ 3203{
2218 int i; 3204 int i;
2219 3205
2220 for (i = 0; i < timercnt; ++i) 3206 for (i = 0; i < timercnt; ++i)
… …
2257 * doesn't hurt either as we only do this on time-jumps or 3243 * doesn't hurt either as we only do this on time-jumps or
2258 * in the unlikely event of having been preempted here. 3244 * in the unlikely event of having been preempted here.
2259 */ 3245 */
2260 for (i = 4; --i; ) 3246 for (i = 4; --i; )
2261 { 3247 {
3248 ev_tstamp diff;
2262 rtmn_diff = ev_rt_now - mn_now; 3249 rtmn_diff = ev_rt_now - mn_now;
2263 3250
3251 diff = odiff - rtmn_diff;
3252
2264 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3253 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2265 return; /* all is well */ 3254 return; /* all is well */
2266 3255
2267 ev_rt_now = ev_time (); 3256 ev_rt_now = ev_time ();
2268 mn_now = get_clock (); 3257 mn_now = get_clock ();
2269 now_floor = mn_now; 3258 now_floor = mn_now;
… …
2291 3280
2292 mn_now = ev_rt_now; 3281 mn_now = ev_rt_now;
2293 } 3282 }
2294} 3283}
2295 3284
2296void 3285int
2297ev_loop (EV_P_ int flags) 3286ev_run (EV_P_ int flags)
2298{ 3287{
2299#if EV_FEATURE_API 3288#if EV_FEATURE_API
2300 ++loop_depth; 3289 ++loop_depth;
2301#endif 3290#endif
2302 3291
2303 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 3292 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2304 3293
2305 loop_done = EVUNLOOP_CANCEL; 3294 loop_done = EVBREAK_CANCEL;
2306 3295
2307 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 3296 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2308 3297
2309 do 3298 do
2310 { 3299 {
… …
2353 /* calculate blocking time */ 3342 /* calculate blocking time */
2354 { 3343 {
2355 ev_tstamp waittime = 0.; 3344 ev_tstamp waittime = 0.;
2356 ev_tstamp sleeptime = 0.; 3345 ev_tstamp sleeptime = 0.;
2357 3346
3347 /* remember old timestamp for io_blocktime calculation */
3348 ev_tstamp prev_mn_now = mn_now;
3349
3350 /* update time to cancel out callback processing overhead */
3351 time_update (EV_A_ 1e100);
3352
3353 /* from now on, we want a pipe-wake-up */
3354 pipe_write_wanted = 1;
3355
3356 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3357
2358 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3358 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2359 { 3359 {
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; 3360 waittime = MAX_BLOCKTIME;
2367 3361
2368 if (timercnt) 3362 if (timercnt)
2369 { 3363 {
2370 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3364 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2371 if (waittime > to) waittime = to; 3365 if (waittime > to) waittime = to;
2372 } 3366 }
2373 3367
2374#if EV_PERIODIC_ENABLE 3368#if EV_PERIODIC_ENABLE
2375 if (periodiccnt) 3369 if (periodiccnt)
2376 { 3370 {
2377 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3371 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2378 if (waittime > to) waittime = to; 3372 if (waittime > to) waittime = to;
2379 } 3373 }
2380#endif 3374#endif
2381 3375
2382 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3376 /* don't let timeouts decrease the waittime below timeout_blocktime */
2383 if (expect_false (waittime < timeout_blocktime)) 3377 if (expect_false (waittime < timeout_blocktime))
2384 waittime = timeout_blocktime; 3378 waittime = timeout_blocktime;
3379
3380 /* at this point, we NEED to wait, so we have to ensure */
3381 /* to pass a minimum nonzero value to the backend */
3382 if (expect_false (waittime < backend_mintime))
3383 waittime = backend_mintime;
2385 3384
2386 /* extra check because io_blocktime is commonly 0 */ 3385 /* extra check because io_blocktime is commonly 0 */
2387 if (expect_false (io_blocktime)) 3386 if (expect_false (io_blocktime))
2388 { 3387 {
2389 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3388 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2390 3389
2391 if (sleeptime > waittime - backend_fudge) 3390 if (sleeptime > waittime - backend_mintime)
2392 sleeptime = waittime - backend_fudge; 3391 sleeptime = waittime - backend_mintime;
2393 3392
2394 if (expect_true (sleeptime > 0.)) 3393 if (expect_true (sleeptime > 0.))
2395 { 3394 {
2396 ev_sleep (sleeptime); 3395 ev_sleep (sleeptime);
2397 waittime -= sleeptime; 3396 waittime -= sleeptime;
… …
2400 } 3399 }
2401 3400
2402#if EV_FEATURE_API 3401#if EV_FEATURE_API
2403 ++loop_count; 3402 ++loop_count;
2404#endif 3403#endif
2405 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 3404 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2406 backend_poll (EV_A_ waittime); 3405 backend_poll (EV_A_ waittime);
2407 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 3406 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3407
3408 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3409
3410 ECB_MEMORY_FENCE_ACQUIRE;
3411 if (pipe_write_skipped)
3412 {
3413 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3414 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3415 }
3416
2408 3417
2409 /* update ev_rt_now, do magic */ 3418 /* update ev_rt_now, do magic */
2410 time_update (EV_A_ waittime + sleeptime); 3419 time_update (EV_A_ waittime + sleeptime);
2411 } 3420 }
2412 3421
… …
2430 EV_INVOKE_PENDING; 3439 EV_INVOKE_PENDING;
2431 } 3440 }
2432 while (expect_true ( 3441 while (expect_true (
2433 activecnt 3442 activecnt
2434 && !loop_done 3443 && !loop_done
2435 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3444 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2436 )); 3445 ));
2437 3446
2438 if (loop_done == EVUNLOOP_ONE) 3447 if (loop_done == EVBREAK_ONE)
2439 loop_done = EVUNLOOP_CANCEL; 3448 loop_done = EVBREAK_CANCEL;
2440 3449
2441#if EV_FEATURE_API 3450#if EV_FEATURE_API
2442 --loop_depth; 3451 --loop_depth;
2443#endif 3452#endif
3453
3454 return activecnt;
2444} 3455}
2445 3456
2446void 3457void
2447ev_unloop (EV_P_ int how) 3458ev_break (EV_P_ int how) EV_THROW
2448{ 3459{
2449 loop_done = how; 3460 loop_done = how;
2450} 3461}
2451 3462
2452void 3463void
2453ev_ref (EV_P) 3464ev_ref (EV_P) EV_THROW
2454{ 3465{
2455 ++activecnt; 3466 ++activecnt;
2456} 3467}
2457 3468
2458void 3469void
2459ev_unref (EV_P) 3470ev_unref (EV_P) EV_THROW
2460{ 3471{
2461 --activecnt; 3472 --activecnt;
2462} 3473}
2463 3474
2464void 3475void
2465ev_now_update (EV_P) 3476ev_now_update (EV_P) EV_THROW
2466{ 3477{
2467 time_update (EV_A_ 1e100); 3478 time_update (EV_A_ 1e100);
2468} 3479}
2469 3480
2470void 3481void
2471ev_suspend (EV_P) 3482ev_suspend (EV_P) EV_THROW
2472{ 3483{
2473 ev_now_update (EV_A); 3484 ev_now_update (EV_A);
2474} 3485}
2475 3486
2476void 3487void
2477ev_resume (EV_P) 3488ev_resume (EV_P) EV_THROW
2478{ 3489{
2479 ev_tstamp mn_prev = mn_now; 3490 ev_tstamp mn_prev = mn_now;
2480 3491
2481 ev_now_update (EV_A); 3492 ev_now_update (EV_A);
2482 timers_reschedule (EV_A_ mn_now - mn_prev); 3493 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2521 w->pending = 0; 3532 w->pending = 0;
2522 } 3533 }
2523} 3534}
2524 3535
2525int 3536int
2526ev_clear_pending (EV_P_ void *w) 3537ev_clear_pending (EV_P_ void *w) EV_THROW
2527{ 3538{
2528 W w_ = (W)w; 3539 W w_ = (W)w;
2529 int pending = w_->pending; 3540 int pending = w_->pending;
2530 3541
2531 if (expect_true (pending)) 3542 if (expect_true (pending))
… …
2564} 3575}
2565 3576
2566/*****************************************************************************/ 3577/*****************************************************************************/
2567 3578
2568void noinline 3579void noinline
2569ev_io_start (EV_P_ ev_io *w) 3580ev_io_start (EV_P_ ev_io *w) EV_THROW
2570{ 3581{
2571 int fd = w->fd; 3582 int fd = w->fd;
2572 3583
2573 if (expect_false (ev_is_active (w))) 3584 if (expect_false (ev_is_active (w)))
2574 return; 3585 return;
… …
2580 3591
2581 ev_start (EV_A_ (W)w, 1); 3592 ev_start (EV_A_ (W)w, 1);
2582 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3593 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2583 wlist_add (&anfds[fd].head, (WL)w); 3594 wlist_add (&anfds[fd].head, (WL)w);
2584 3595
3596 /* common bug, apparently */
3597 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3598
2585 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3599 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2586 w->events &= ~EV__IOFDSET; 3600 w->events &= ~EV__IOFDSET;
2587 3601
2588 EV_FREQUENT_CHECK; 3602 EV_FREQUENT_CHECK;
2589} 3603}
2590 3604
2591void noinline 3605void noinline
2592ev_io_stop (EV_P_ ev_io *w) 3606ev_io_stop (EV_P_ ev_io *w) EV_THROW
2593{ 3607{
2594 clear_pending (EV_A_ (W)w); 3608 clear_pending (EV_A_ (W)w);
2595 if (expect_false (!ev_is_active (w))) 3609 if (expect_false (!ev_is_active (w)))
2596 return; 3610 return;
2597 3611
… …
2606 3620
2607 EV_FREQUENT_CHECK; 3621 EV_FREQUENT_CHECK;
2608} 3622}
2609 3623
2610void noinline 3624void noinline
2611ev_timer_start (EV_P_ ev_timer *w) 3625ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2612{ 3626{
2613 if (expect_false (ev_is_active (w))) 3627 if (expect_false (ev_is_active (w)))
2614 return; 3628 return;
2615 3629
2616 ev_at (w) += mn_now; 3630 ev_at (w) += mn_now;
… …
2630 3644
2631 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3645 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2632} 3646}
2633 3647
2634void noinline 3648void noinline
2635ev_timer_stop (EV_P_ ev_timer *w) 3649ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2636{ 3650{
2637 clear_pending (EV_A_ (W)w); 3651 clear_pending (EV_A_ (W)w);
2638 if (expect_false (!ev_is_active (w))) 3652 if (expect_false (!ev_is_active (w)))
2639 return; 3653 return;
2640 3654
… …
2660 3674
2661 EV_FREQUENT_CHECK; 3675 EV_FREQUENT_CHECK;
2662} 3676}
2663 3677
2664void noinline 3678void noinline
2665ev_timer_again (EV_P_ ev_timer *w) 3679ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2666{ 3680{
2667 EV_FREQUENT_CHECK; 3681 EV_FREQUENT_CHECK;
3682
3683 clear_pending (EV_A_ (W)w);
2668 3684
2669 if (ev_is_active (w)) 3685 if (ev_is_active (w))
2670 { 3686 {
2671 if (w->repeat) 3687 if (w->repeat)
2672 { 3688 {
… …
2685 3701
2686 EV_FREQUENT_CHECK; 3702 EV_FREQUENT_CHECK;
2687} 3703}
2688 3704
2689ev_tstamp 3705ev_tstamp
2690ev_timer_remaining (EV_P_ ev_timer *w) 3706ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2691{ 3707{
2692 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3708 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2693} 3709}
2694 3710
2695#if EV_PERIODIC_ENABLE 3711#if EV_PERIODIC_ENABLE
2696void noinline 3712void noinline
2697ev_periodic_start (EV_P_ ev_periodic *w) 3713ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2698{ 3714{
2699 if (expect_false (ev_is_active (w))) 3715 if (expect_false (ev_is_active (w)))
2700 return; 3716 return;
2701 3717
2702 if (w->reschedule_cb) 3718 if (w->reschedule_cb)
2703 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3719 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2704 else if (w->interval) 3720 else if (w->interval)
2705 { 3721 {
2706 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3722 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 */ 3723 periodic_recalc (EV_A_ w);
2708 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2709 } 3724 }
2710 else 3725 else
2711 ev_at (w) = w->offset; 3726 ev_at (w) = w->offset;
2712 3727
2713 EV_FREQUENT_CHECK; 3728 EV_FREQUENT_CHECK;
… …
2723 3738
2724 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3739 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2725} 3740}
2726 3741
2727void noinline 3742void noinline
2728ev_periodic_stop (EV_P_ ev_periodic *w) 3743ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2729{ 3744{
2730 clear_pending (EV_A_ (W)w); 3745 clear_pending (EV_A_ (W)w);
2731 if (expect_false (!ev_is_active (w))) 3746 if (expect_false (!ev_is_active (w)))
2732 return; 3747 return;
2733 3748
… …
2751 3766
2752 EV_FREQUENT_CHECK; 3767 EV_FREQUENT_CHECK;
2753} 3768}
2754 3769
2755void noinline 3770void noinline
2756ev_periodic_again (EV_P_ ev_periodic *w) 3771ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2757{ 3772{
2758 /* TODO: use adjustheap and recalculation */ 3773 /* TODO: use adjustheap and recalculation */
2759 ev_periodic_stop (EV_A_ w); 3774 ev_periodic_stop (EV_A_ w);
2760 ev_periodic_start (EV_A_ w); 3775 ev_periodic_start (EV_A_ w);
2761} 3776}
… …
2766#endif 3781#endif
2767 3782
2768#if EV_SIGNAL_ENABLE 3783#if EV_SIGNAL_ENABLE
2769 3784
2770void noinline 3785void noinline
2771ev_signal_start (EV_P_ ev_signal *w) 3786ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2772{ 3787{
2773 if (expect_false (ev_is_active (w))) 3788 if (expect_false (ev_is_active (w)))
2774 return; 3789 return;
2775 3790
2776 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3791 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2778#if EV_MULTIPLICITY 3793#if EV_MULTIPLICITY
2779 assert (("libev: a signal must not be attached to two different loops", 3794 assert (("libev: a signal must not be attached to two different loops",
2780 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3795 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2781 3796
2782 signals [w->signum - 1].loop = EV_A; 3797 signals [w->signum - 1].loop = EV_A;
3798 ECB_MEMORY_FENCE_RELEASE;
2783#endif 3799#endif
2784 3800
2785 EV_FREQUENT_CHECK; 3801 EV_FREQUENT_CHECK;
2786 3802
2787#if EV_USE_SIGNALFD 3803#if EV_USE_SIGNALFD
… …
2834 sa.sa_handler = ev_sighandler; 3850 sa.sa_handler = ev_sighandler;
2835 sigfillset (&sa.sa_mask); 3851 sigfillset (&sa.sa_mask);
2836 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3852 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2837 sigaction (w->signum, &sa, 0); 3853 sigaction (w->signum, &sa, 0);
2838 3854
3855 if (origflags & EVFLAG_NOSIGMASK)
3856 {
2839 sigemptyset (&sa.sa_mask); 3857 sigemptyset (&sa.sa_mask);
2840 sigaddset (&sa.sa_mask, w->signum); 3858 sigaddset (&sa.sa_mask, w->signum);
2841 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3859 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3860 }
2842#endif 3861#endif
2843 } 3862 }
2844 3863
2845 EV_FREQUENT_CHECK; 3864 EV_FREQUENT_CHECK;
2846} 3865}
2847 3866
2848void noinline 3867void noinline
2849ev_signal_stop (EV_P_ ev_signal *w) 3868ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2850{ 3869{
2851 clear_pending (EV_A_ (W)w); 3870 clear_pending (EV_A_ (W)w);
2852 if (expect_false (!ev_is_active (w))) 3871 if (expect_false (!ev_is_active (w)))
2853 return; 3872 return;
2854 3873
… …
2885#endif 3904#endif
2886 3905
2887#if EV_CHILD_ENABLE 3906#if EV_CHILD_ENABLE
2888 3907
2889void 3908void
2890ev_child_start (EV_P_ ev_child *w) 3909ev_child_start (EV_P_ ev_child *w) EV_THROW
2891{ 3910{
2892#if EV_MULTIPLICITY 3911#if EV_MULTIPLICITY
2893 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3912 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2894#endif 3913#endif
2895 if (expect_false (ev_is_active (w))) 3914 if (expect_false (ev_is_active (w)))
… …
2902 3921
2903 EV_FREQUENT_CHECK; 3922 EV_FREQUENT_CHECK;
2904} 3923}
2905 3924
2906void 3925void
2907ev_child_stop (EV_P_ ev_child *w) 3926ev_child_stop (EV_P_ ev_child *w) EV_THROW
2908{ 3927{
2909 clear_pending (EV_A_ (W)w); 3928 clear_pending (EV_A_ (W)w);
2910 if (expect_false (!ev_is_active (w))) 3929 if (expect_false (!ev_is_active (w)))
2911 return; 3930 return;
2912 3931
… …
2939# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3958# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2940 3959
2941static void noinline 3960static void noinline
2942infy_add (EV_P_ ev_stat *w) 3961infy_add (EV_P_ ev_stat *w)
2943{ 3962{
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); 3963 w->wd = inotify_add_watch (fs_fd, w->path,
3964 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3965 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3966 | IN_DONT_FOLLOW | IN_MASK_ADD);
2945 3967
2946 if (w->wd >= 0) 3968 if (w->wd >= 0)
2947 { 3969 {
2948 struct statfs sfs; 3970 struct statfs sfs;
2949 3971
… …
2953 3975
2954 if (!fs_2625) 3976 if (!fs_2625)
2955 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3977 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2956 else if (!statfs (w->path, &sfs) 3978 else if (!statfs (w->path, &sfs)
2957 && (sfs.f_type == 0x1373 /* devfs */ 3979 && (sfs.f_type == 0x1373 /* devfs */
3980 || sfs.f_type == 0x4006 /* fat */
3981 || sfs.f_type == 0x4d44 /* msdos */
2958 || sfs.f_type == 0xEF53 /* ext2/3 */ 3982 || sfs.f_type == 0xEF53 /* ext2/3 */
3983 || sfs.f_type == 0x72b6 /* jffs2 */
3984 || sfs.f_type == 0x858458f6 /* ramfs */
3985 || sfs.f_type == 0x5346544e /* ntfs */
2959 || sfs.f_type == 0x3153464a /* jfs */ 3986 || sfs.f_type == 0x3153464a /* jfs */
3987 || sfs.f_type == 0x9123683e /* btrfs */
2960 || sfs.f_type == 0x52654973 /* reiser3 */ 3988 || sfs.f_type == 0x52654973 /* reiser3 */
2961 || sfs.f_type == 0x01021994 /* tempfs */ 3989 || sfs.f_type == 0x01021994 /* tmpfs */
2962 || sfs.f_type == 0x58465342 /* xfs */)) 3990 || sfs.f_type == 0x58465342 /* xfs */))
2963 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3991 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2964 else 3992 else
2965 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3993 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2966 } 3994 }
… …
2987 if (!pend || pend == path) 4015 if (!pend || pend == path)
2988 break; 4016 break;
2989 4017
2990 *pend = 0; 4018 *pend = 0;
2991 w->wd = inotify_add_watch (fs_fd, path, mask); 4019 w->wd = inotify_add_watch (fs_fd, path, mask);
2992 } 4020 }
2993 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4021 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2994 } 4022 }
2995 } 4023 }
2996 4024
2997 if (w->wd >= 0) 4025 if (w->wd >= 0)
… …
3064 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4092 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3065 ofs += sizeof (struct inotify_event) + ev->len; 4093 ofs += sizeof (struct inotify_event) + ev->len;
3066 } 4094 }
3067} 4095}
3068 4096
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 4097inline_size void ecb_cold
3102ev_check_2625 (EV_P) 4098ev_check_2625 (EV_P)
3103{ 4099{
3104 /* kernels < 2.6.25 are borked 4100 /* kernels < 2.6.25 are borked
3105 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4101 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3106 */ 4102 */
… …
3111} 4107}
3112 4108
3113inline_size int 4109inline_size int
3114infy_newfd (void) 4110infy_newfd (void)
3115{ 4111{
3116#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4112#if defined IN_CLOEXEC && defined IN_NONBLOCK
3117 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4113 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3118 if (fd >= 0) 4114 if (fd >= 0)
3119 return fd; 4115 return fd;
3120#endif 4116#endif
3121 return inotify_init (); 4117 return inotify_init ();
… …
3196#else 4192#else
3197# define EV_LSTAT(p,b) lstat (p, b) 4193# define EV_LSTAT(p,b) lstat (p, b)
3198#endif 4194#endif
3199 4195
3200void 4196void
3201ev_stat_stat (EV_P_ ev_stat *w) 4197ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3202{ 4198{
3203 if (lstat (w->path, &w->attr) < 0) 4199 if (lstat (w->path, &w->attr) < 0)
3204 w->attr.st_nlink = 0; 4200 w->attr.st_nlink = 0;
3205 else if (!w->attr.st_nlink) 4201 else if (!w->attr.st_nlink)
3206 w->attr.st_nlink = 1; 4202 w->attr.st_nlink = 1;
… …
3245 ev_feed_event (EV_A_ w, EV_STAT); 4241 ev_feed_event (EV_A_ w, EV_STAT);
3246 } 4242 }
3247} 4243}
3248 4244
3249void 4245void
3250ev_stat_start (EV_P_ ev_stat *w) 4246ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3251{ 4247{
3252 if (expect_false (ev_is_active (w))) 4248 if (expect_false (ev_is_active (w)))
3253 return; 4249 return;
3254 4250
3255 ev_stat_stat (EV_A_ w); 4251 ev_stat_stat (EV_A_ w);
… …
3276 4272
3277 EV_FREQUENT_CHECK; 4273 EV_FREQUENT_CHECK;
3278} 4274}
3279 4275
3280void 4276void
3281ev_stat_stop (EV_P_ ev_stat *w) 4277ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3282{ 4278{
3283 clear_pending (EV_A_ (W)w); 4279 clear_pending (EV_A_ (W)w);
3284 if (expect_false (!ev_is_active (w))) 4280 if (expect_false (!ev_is_active (w)))
3285 return; 4281 return;
3286 4282
… …
3302} 4298}
3303#endif 4299#endif
3304 4300
3305#if EV_IDLE_ENABLE 4301#if EV_IDLE_ENABLE
3306void 4302void
3307ev_idle_start (EV_P_ ev_idle *w) 4303ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3308{ 4304{
3309 if (expect_false (ev_is_active (w))) 4305 if (expect_false (ev_is_active (w)))
3310 return; 4306 return;
3311 4307
3312 pri_adjust (EV_A_ (W)w); 4308 pri_adjust (EV_A_ (W)w);
… …
3325 4321
3326 EV_FREQUENT_CHECK; 4322 EV_FREQUENT_CHECK;
3327} 4323}
3328 4324
3329void 4325void
3330ev_idle_stop (EV_P_ ev_idle *w) 4326ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3331{ 4327{
3332 clear_pending (EV_A_ (W)w); 4328 clear_pending (EV_A_ (W)w);
3333 if (expect_false (!ev_is_active (w))) 4329 if (expect_false (!ev_is_active (w)))
3334 return; 4330 return;
3335 4331
… …
3349} 4345}
3350#endif 4346#endif
3351 4347
3352#if EV_PREPARE_ENABLE 4348#if EV_PREPARE_ENABLE
3353void 4349void
3354ev_prepare_start (EV_P_ ev_prepare *w) 4350ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3355{ 4351{
3356 if (expect_false (ev_is_active (w))) 4352 if (expect_false (ev_is_active (w)))
3357 return; 4353 return;
3358 4354
3359 EV_FREQUENT_CHECK; 4355 EV_FREQUENT_CHECK;
… …
3364 4360
3365 EV_FREQUENT_CHECK; 4361 EV_FREQUENT_CHECK;
3366} 4362}
3367 4363
3368void 4364void
3369ev_prepare_stop (EV_P_ ev_prepare *w) 4365ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3370{ 4366{
3371 clear_pending (EV_A_ (W)w); 4367 clear_pending (EV_A_ (W)w);
3372 if (expect_false (!ev_is_active (w))) 4368 if (expect_false (!ev_is_active (w)))
3373 return; 4369 return;
3374 4370
… …
3387} 4383}
3388#endif 4384#endif
3389 4385
3390#if EV_CHECK_ENABLE 4386#if EV_CHECK_ENABLE
3391void 4387void
3392ev_check_start (EV_P_ ev_check *w) 4388ev_check_start (EV_P_ ev_check *w) EV_THROW
3393{ 4389{
3394 if (expect_false (ev_is_active (w))) 4390 if (expect_false (ev_is_active (w)))
3395 return; 4391 return;
3396 4392
3397 EV_FREQUENT_CHECK; 4393 EV_FREQUENT_CHECK;
… …
3402 4398
3403 EV_FREQUENT_CHECK; 4399 EV_FREQUENT_CHECK;
3404} 4400}
3405 4401
3406void 4402void
3407ev_check_stop (EV_P_ ev_check *w) 4403ev_check_stop (EV_P_ ev_check *w) EV_THROW
3408{ 4404{
3409 clear_pending (EV_A_ (W)w); 4405 clear_pending (EV_A_ (W)w);
3410 if (expect_false (!ev_is_active (w))) 4406 if (expect_false (!ev_is_active (w)))
3411 return; 4407 return;
3412 4408
… …
3425} 4421}
3426#endif 4422#endif
3427 4423
3428#if EV_EMBED_ENABLE 4424#if EV_EMBED_ENABLE
3429void noinline 4425void noinline
3430ev_embed_sweep (EV_P_ ev_embed *w) 4426ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3431{ 4427{
3432 ev_loop (w->other, EVLOOP_NONBLOCK); 4428 ev_run (w->other, EVRUN_NOWAIT);
3433} 4429}
3434 4430
3435static void 4431static void
3436embed_io_cb (EV_P_ ev_io *io, int revents) 4432embed_io_cb (EV_P_ ev_io *io, int revents)
3437{ 4433{
3438 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4434 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3439 4435
3440 if (ev_cb (w)) 4436 if (ev_cb (w))
3441 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4437 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3442 else 4438 else
3443 ev_loop (w->other, EVLOOP_NONBLOCK); 4439 ev_run (w->other, EVRUN_NOWAIT);
3444} 4440}
3445 4441
3446static void 4442static void
3447embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4443embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3448{ 4444{
… …
3452 EV_P = w->other; 4448 EV_P = w->other;
3453 4449
3454 while (fdchangecnt) 4450 while (fdchangecnt)
3455 { 4451 {
3456 fd_reify (EV_A); 4452 fd_reify (EV_A);
3457 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4453 ev_run (EV_A_ EVRUN_NOWAIT);
3458 } 4454 }
3459 } 4455 }
3460} 4456}
3461 4457
3462static void 4458static void
… …
3468 4464
3469 { 4465 {
3470 EV_P = w->other; 4466 EV_P = w->other;
3471 4467
3472 ev_loop_fork (EV_A); 4468 ev_loop_fork (EV_A);
3473 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4469 ev_run (EV_A_ EVRUN_NOWAIT);
3474 } 4470 }
3475 4471
3476 ev_embed_start (EV_A_ w); 4472 ev_embed_start (EV_A_ w);
3477} 4473}
3478 4474
… …
3483 ev_idle_stop (EV_A_ idle); 4479 ev_idle_stop (EV_A_ idle);
3484} 4480}
3485#endif 4481#endif
3486 4482
3487void 4483void
3488ev_embed_start (EV_P_ ev_embed *w) 4484ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3489{ 4485{
3490 if (expect_false (ev_is_active (w))) 4486 if (expect_false (ev_is_active (w)))
3491 return; 4487 return;
3492 4488
3493 { 4489 {
… …
3514 4510
3515 EV_FREQUENT_CHECK; 4511 EV_FREQUENT_CHECK;
3516} 4512}
3517 4513
3518void 4514void
3519ev_embed_stop (EV_P_ ev_embed *w) 4515ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3520{ 4516{
3521 clear_pending (EV_A_ (W)w); 4517 clear_pending (EV_A_ (W)w);
3522 if (expect_false (!ev_is_active (w))) 4518 if (expect_false (!ev_is_active (w)))
3523 return; 4519 return;
3524 4520
… …
3534} 4530}
3535#endif 4531#endif
3536 4532
3537#if EV_FORK_ENABLE 4533#if EV_FORK_ENABLE
3538void 4534void
3539ev_fork_start (EV_P_ ev_fork *w) 4535ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3540{ 4536{
3541 if (expect_false (ev_is_active (w))) 4537 if (expect_false (ev_is_active (w)))
3542 return; 4538 return;
3543 4539
3544 EV_FREQUENT_CHECK; 4540 EV_FREQUENT_CHECK;
… …
3549 4545
3550 EV_FREQUENT_CHECK; 4546 EV_FREQUENT_CHECK;
3551} 4547}
3552 4548
3553void 4549void
3554ev_fork_stop (EV_P_ ev_fork *w) 4550ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3555{ 4551{
3556 clear_pending (EV_A_ (W)w); 4552 clear_pending (EV_A_ (W)w);
3557 if (expect_false (!ev_is_active (w))) 4553 if (expect_false (!ev_is_active (w)))
3558 return; 4554 return;
3559 4555
… …
3570 4566
3571 EV_FREQUENT_CHECK; 4567 EV_FREQUENT_CHECK;
3572} 4568}
3573#endif 4569#endif
3574 4570
4571#if EV_CLEANUP_ENABLE
4572void
4573ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4574{
4575 if (expect_false (ev_is_active (w)))
4576 return;
4577
4578 EV_FREQUENT_CHECK;
4579
4580 ev_start (EV_A_ (W)w, ++cleanupcnt);
4581 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4582 cleanups [cleanupcnt - 1] = w;
4583
4584 /* cleanup watchers should never keep a refcount on the loop */
4585 ev_unref (EV_A);
4586 EV_FREQUENT_CHECK;
4587}
4588
4589void
4590ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4591{
4592 clear_pending (EV_A_ (W)w);
4593 if (expect_false (!ev_is_active (w)))
4594 return;
4595
4596 EV_FREQUENT_CHECK;
4597 ev_ref (EV_A);
4598
4599 {
4600 int active = ev_active (w);
4601
4602 cleanups [active - 1] = cleanups [--cleanupcnt];
4603 ev_active (cleanups [active - 1]) = active;
4604 }
4605
4606 ev_stop (EV_A_ (W)w);
4607
4608 EV_FREQUENT_CHECK;
4609}
4610#endif
4611
3575#if EV_ASYNC_ENABLE 4612#if EV_ASYNC_ENABLE
3576void 4613void
3577ev_async_start (EV_P_ ev_async *w) 4614ev_async_start (EV_P_ ev_async *w) EV_THROW
3578{ 4615{
3579 if (expect_false (ev_is_active (w))) 4616 if (expect_false (ev_is_active (w)))
3580 return; 4617 return;
4618
4619 w->sent = 0;
3581 4620
3582 evpipe_init (EV_A); 4621 evpipe_init (EV_A);
3583 4622
3584 EV_FREQUENT_CHECK; 4623 EV_FREQUENT_CHECK;
3585 4624
… …
3589 4628
3590 EV_FREQUENT_CHECK; 4629 EV_FREQUENT_CHECK;
3591} 4630}
3592 4631
3593void 4632void
3594ev_async_stop (EV_P_ ev_async *w) 4633ev_async_stop (EV_P_ ev_async *w) EV_THROW
3595{ 4634{
3596 clear_pending (EV_A_ (W)w); 4635 clear_pending (EV_A_ (W)w);
3597 if (expect_false (!ev_is_active (w))) 4636 if (expect_false (!ev_is_active (w)))
3598 return; 4637 return;
3599 4638
… …
3610 4649
3611 EV_FREQUENT_CHECK; 4650 EV_FREQUENT_CHECK;
3612} 4651}
3613 4652
3614void 4653void
3615ev_async_send (EV_P_ ev_async *w) 4654ev_async_send (EV_P_ ev_async *w) EV_THROW
3616{ 4655{
3617 w->sent = 1; 4656 w->sent = 1;
3618 evpipe_write (EV_A_ &async_pending); 4657 evpipe_write (EV_A_ &async_pending);
3619} 4658}
3620#endif 4659#endif
… …
3657 4696
3658 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4697 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3659} 4698}
3660 4699
3661void 4700void
3662ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4701ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3663{ 4702{
3664 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4703 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3665 4704
3666 if (expect_false (!once)) 4705 if (expect_false (!once))
3667 { 4706 {
… …
3688} 4727}
3689 4728
3690/*****************************************************************************/ 4729/*****************************************************************************/
3691 4730
3692#if EV_WALK_ENABLE 4731#if EV_WALK_ENABLE
3693void 4732void ecb_cold
3694ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4733ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3695{ 4734{
3696 int i, j; 4735 int i, j;
3697 ev_watcher_list *wl, *wn; 4736 ev_watcher_list *wl, *wn;
3698 4737
3699 if (types & (EV_IO | EV_EMBED)) 4738 if (types & (EV_IO | EV_EMBED))
… …
3742 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4781 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3743#endif 4782#endif
3744 4783
3745#if EV_IDLE_ENABLE 4784#if EV_IDLE_ENABLE
3746 if (types & EV_IDLE) 4785 if (types & EV_IDLE)
3747 for (j = NUMPRI; i--; ) 4786 for (j = NUMPRI; j--; )
3748 for (i = idlecnt [j]; i--; ) 4787 for (i = idlecnt [j]; i--; )
3749 cb (EV_A_ EV_IDLE, idles [j][i]); 4788 cb (EV_A_ EV_IDLE, idles [j][i]);
3750#endif 4789#endif
3751 4790
3752#if EV_FORK_ENABLE 4791#if EV_FORK_ENABLE
… …
3805 4844
3806#if EV_MULTIPLICITY 4845#if EV_MULTIPLICITY
3807 #include "ev_wrap.h" 4846 #include "ev_wrap.h"
3808#endif 4847#endif
3809 4848
3810#ifdef __cplusplus
3811}
3812#endif
3813

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