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Comparing libev/ev.c (file contents):
Revision 1.368 by root, Mon Jan 17 12:11:11 2011 UTC vs.
Revision 1.453 by root, Thu Feb 28 00:33:25 2013 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
156# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
157# endif 163# endif
158 164
159#endif 165#endif
160 166
161#include <math.h>
162#include <stdlib.h> 167#include <stdlib.h>
163#include <string.h> 168#include <string.h>
164#include <fcntl.h> 169#include <fcntl.h>
165#include <stddef.h> 170#include <stddef.h>
166 171
… …
178# include EV_H 183# include EV_H
179#else 184#else
180# include "ev.h" 185# include "ev.h"
181#endif 186#endif
182 187
183EV_CPP(extern "C" {) 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
197#endif
184 198
185#ifndef _WIN32 199#ifndef _WIN32
186# include <sys/time.h> 200# include <sys/time.h>
187# include <sys/wait.h> 201# include <sys/wait.h>
188# include <unistd.h> 202# include <unistd.h>
189#else 203#else
190# include <io.h> 204# include <io.h>
191# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
192# include <windows.h> 207# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
195# endif 210# endif
196# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
205#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
206 221
207/* 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 */
208 223
209/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 225#if defined EV_NSIG
211/* use what's provided */ 226/* use what's provided */
212#elif defined (NSIG) 227#elif defined NSIG
213# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 229#elif defined _NSIG
215# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 231#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 233#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 237#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 239#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 243#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 245#else
231# error "unable to find value for NSIG, please report" 246# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */ 247/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */ 248/* but consider reporting it, too! :) */
234# define EV_NSIG 65 249# define EV_NSIG 65
235#endif 250#endif
236 251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
237#ifndef EV_USE_CLOCK_SYSCALL 256#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 257# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 259# else
241# define EV_USE_CLOCK_SYSCALL 0 260# define EV_USE_CLOCK_SYSCALL 0
242# endif 261# endif
243#endif 262#endif
244 263
245#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 266# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 267# else
249# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
250# endif 269# endif
251#endif 270#endif
… …
338 357
339#ifndef EV_HEAP_CACHE_AT 358#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 360#endif
342 361
362#ifdef ANDROID
363/* supposedly, android doesn't typedef fd_mask */
364# undef EV_USE_SELECT
365# define EV_USE_SELECT 0
366/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
367# undef EV_USE_CLOCK_SYSCALL
368# define EV_USE_CLOCK_SYSCALL 0
369#endif
370
371/* aix's poll.h seems to cause lots of trouble */
372#ifdef _AIX
373/* AIX has a completely broken poll.h header */
374# undef EV_USE_POLL
375# define EV_USE_POLL 0
376#endif
377
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 378/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 379/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 380#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 381# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 382# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 383# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 385# define EV_USE_MONOTONIC 1
351# else 386# else
… …
354# endif 389# endif
355#endif 390#endif
356 391
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 392/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 393
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 394#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 395# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 396# define EV_USE_MONOTONIC 0
368#endif 397#endif
369 398
… …
376# undef EV_USE_INOTIFY 405# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 406# define EV_USE_INOTIFY 0
378#endif 407#endif
379 408
380#if !EV_USE_NANOSLEEP 409#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 410/* hp-ux has it in sys/time.h, which we unconditionally include above */
411# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 412# include <sys/select.h>
383# endif 413# endif
384#endif 414#endif
385 415
386#if EV_USE_INOTIFY 416#if EV_USE_INOTIFY
… …
389/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 419/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
390# ifndef IN_DONT_FOLLOW 420# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY 421# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0 422# define EV_USE_INOTIFY 0
393# endif 423# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif 424#endif
399 425
400#if EV_USE_EVENTFD 426#if EV_USE_EVENTFD
401/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
402# include <stdint.h> 428# include <stdint.h>
… …
442#else 468#else
443# define EV_FREQUENT_CHECK do { } while (0) 469# define EV_FREQUENT_CHECK do { } while (0)
444#endif 470#endif
445 471
446/* 472/*
447 * This is used to avoid floating point rounding problems. 473 * This is used to work around floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000. 474 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */ 475 */
454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 476#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
477/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
455 478
456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 479#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 480#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
458 481
459#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 482#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
460#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 483#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
461 484
485/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
486/* ECB.H BEGIN */
487/*
488 * libecb - http://software.schmorp.de/pkg/libecb
489 *
490 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
491 * Copyright (©) 2011 Emanuele Giaquinta
492 * All rights reserved.
493 *
494 * Redistribution and use in source and binary forms, with or without modifica-
495 * tion, are permitted provided that the following conditions are met:
496 *
497 * 1. Redistributions of source code must retain the above copyright notice,
498 * this list of conditions and the following disclaimer.
499 *
500 * 2. Redistributions in binary form must reproduce the above copyright
501 * notice, this list of conditions and the following disclaimer in the
502 * documentation and/or other materials provided with the distribution.
503 *
504 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
505 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
506 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
507 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
508 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
509 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
510 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
511 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
512 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
513 * OF THE POSSIBILITY OF SUCH DAMAGE.
514 */
515
516#ifndef ECB_H
517#define ECB_H
518
519/* 16 bits major, 16 bits minor */
520#define ECB_VERSION 0x00010002
521
522#ifdef _WIN32
523 typedef signed char int8_t;
524 typedef unsigned char uint8_t;
525 typedef signed short int16_t;
526 typedef unsigned short uint16_t;
527 typedef signed int int32_t;
528 typedef unsigned int uint32_t;
462#if __GNUC__ >= 4 529 #if __GNUC__
463# define expect(expr,value) __builtin_expect ((expr),(value)) 530 typedef signed long long int64_t;
464# define noinline __attribute__ ((noinline)) 531 typedef unsigned long long uint64_t;
532 #else /* _MSC_VER || __BORLANDC__ */
533 typedef signed __int64 int64_t;
534 typedef unsigned __int64 uint64_t;
535 #endif
536 #ifdef _WIN64
537 #define ECB_PTRSIZE 8
538 typedef uint64_t uintptr_t;
539 typedef int64_t intptr_t;
540 #else
541 #define ECB_PTRSIZE 4
542 typedef uint32_t uintptr_t;
543 typedef int32_t intptr_t;
544 #endif
465#else 545#else
466# define expect(expr,value) (expr) 546 #include <inttypes.h>
467# define noinline 547 #if UINTMAX_MAX > 0xffffffffU
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 548 #define ECB_PTRSIZE 8
469# define inline 549 #else
550 #define ECB_PTRSIZE 4
551 #endif
470# endif 552#endif
553
554/* many compilers define _GNUC_ to some versions but then only implement
555 * what their idiot authors think are the "more important" extensions,
556 * causing enormous grief in return for some better fake benchmark numbers.
557 * or so.
558 * we try to detect these and simply assume they are not gcc - if they have
559 * an issue with that they should have done it right in the first place.
560 */
561#ifndef ECB_GCC_VERSION
562 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
563 #define ECB_GCC_VERSION(major,minor) 0
564 #else
565 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
471#endif 566 #endif
567#endif
472 568
569#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
570#define ECB_C99 (__STDC_VERSION__ >= 199901L)
571#define ECB_C11 (__STDC_VERSION__ >= 201112L)
572#define ECB_CPP (__cplusplus+0)
573#define ECB_CPP11 (__cplusplus >= 201103L)
574
575#if ECB_CPP
576 #define ECB_EXTERN_C extern "C"
577 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
578 #define ECB_EXTERN_C_END }
579#else
580 #define ECB_EXTERN_C extern
581 #define ECB_EXTERN_C_BEG
582 #define ECB_EXTERN_C_END
583#endif
584
585/*****************************************************************************/
586
587/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
588/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
589
590#if ECB_NO_THREADS
591 #define ECB_NO_SMP 1
592#endif
593
594#if ECB_NO_SMP
595 #define ECB_MEMORY_FENCE do { } while (0)
596#endif
597
598#ifndef ECB_MEMORY_FENCE
599 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
600 #if __i386 || __i386__
601 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
602 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
603 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
604 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
606 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
607 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
608 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
609 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
610 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
611 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
612 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
613 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
614 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
616 #elif __sparc || __sparc__
617 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
618 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
619 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
620 #elif defined __s390__ || defined __s390x__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
622 #elif defined __mips__
623 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
624 #elif defined __alpha__
625 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
626 #elif defined __hppa__
627 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif defined __ia64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
631 #endif
632 #endif
633#endif
634
635#ifndef ECB_MEMORY_FENCE
636 #if ECB_GCC_VERSION(4,7)
637 /* see comment below (stdatomic.h) about the C11 memory model. */
638 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
639
640 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
641 * without risking compile time errors with other compilers. We *could*
642 * define our own ecb_clang_has_feature, but I just can't be bothered to work
643 * around this shit time and again.
644 * #elif defined __clang && __has_feature (cxx_atomic)
645 * // see comment below (stdatomic.h) about the C11 memory model.
646 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
647 */
648
649 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
650 #define ECB_MEMORY_FENCE __sync_synchronize ()
651 #elif _MSC_VER >= 1400 /* VC++ 2005 */
652 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
653 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
654 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
655 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
656 #elif defined _WIN32
657 #include <WinNT.h>
658 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
659 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
660 #include <mbarrier.h>
661 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
662 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
663 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
664 #elif __xlC__
665 #define ECB_MEMORY_FENCE __sync ()
666 #endif
667#endif
668
669#ifndef ECB_MEMORY_FENCE
670 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
671 /* we assume that these memory fences work on all variables/all memory accesses, */
672 /* not just C11 atomics and atomic accesses */
673 #include <stdatomic.h>
674 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
675 /* any fence other than seq_cst, which isn't very efficient for us. */
676 /* Why that is, we don't know - either the C11 memory model is quite useless */
677 /* for most usages, or gcc and clang have a bug */
678 /* I *currently* lean towards the latter, and inefficiently implement */
679 /* all three of ecb's fences as a seq_cst fence */
680 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
681 #endif
682#endif
683
684#ifndef ECB_MEMORY_FENCE
685 #if !ECB_AVOID_PTHREADS
686 /*
687 * if you get undefined symbol references to pthread_mutex_lock,
688 * or failure to find pthread.h, then you should implement
689 * the ECB_MEMORY_FENCE operations for your cpu/compiler
690 * OR provide pthread.h and link against the posix thread library
691 * of your system.
692 */
693 #include <pthread.h>
694 #define ECB_NEEDS_PTHREADS 1
695 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
696
697 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
698 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
699 #endif
700#endif
701
702#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
703 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
704#endif
705
706#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
707 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
708#endif
709
710/*****************************************************************************/
711
712#if __cplusplus
713 #define ecb_inline static inline
714#elif ECB_GCC_VERSION(2,5)
715 #define ecb_inline static __inline__
716#elif ECB_C99
717 #define ecb_inline static inline
718#else
719 #define ecb_inline static
720#endif
721
722#if ECB_GCC_VERSION(3,3)
723 #define ecb_restrict __restrict__
724#elif ECB_C99
725 #define ecb_restrict restrict
726#else
727 #define ecb_restrict
728#endif
729
730typedef int ecb_bool;
731
732#define ECB_CONCAT_(a, b) a ## b
733#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
734#define ECB_STRINGIFY_(a) # a
735#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
736
737#define ecb_function_ ecb_inline
738
739#if ECB_GCC_VERSION(3,1)
740 #define ecb_attribute(attrlist) __attribute__(attrlist)
741 #define ecb_is_constant(expr) __builtin_constant_p (expr)
742 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
743 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
744#else
745 #define ecb_attribute(attrlist)
746 #define ecb_is_constant(expr) 0
747 #define ecb_expect(expr,value) (expr)
748 #define ecb_prefetch(addr,rw,locality)
749#endif
750
751/* no emulation for ecb_decltype */
752#if ECB_GCC_VERSION(4,5)
753 #define ecb_decltype(x) __decltype(x)
754#elif ECB_GCC_VERSION(3,0)
755 #define ecb_decltype(x) __typeof(x)
756#endif
757
758#define ecb_noinline ecb_attribute ((__noinline__))
759#define ecb_unused ecb_attribute ((__unused__))
760#define ecb_const ecb_attribute ((__const__))
761#define ecb_pure ecb_attribute ((__pure__))
762
763#if ECB_C11
764 #define ecb_noreturn _Noreturn
765#else
766 #define ecb_noreturn ecb_attribute ((__noreturn__))
767#endif
768
769#if ECB_GCC_VERSION(4,3)
770 #define ecb_artificial ecb_attribute ((__artificial__))
771 #define ecb_hot ecb_attribute ((__hot__))
772 #define ecb_cold ecb_attribute ((__cold__))
773#else
774 #define ecb_artificial
775 #define ecb_hot
776 #define ecb_cold
777#endif
778
779/* put around conditional expressions if you are very sure that the */
780/* expression is mostly true or mostly false. note that these return */
781/* booleans, not the expression. */
473#define expect_false(expr) expect ((expr) != 0, 0) 782#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#define expect_true(expr) expect ((expr) != 0, 1) 783#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
784/* for compatibility to the rest of the world */
785#define ecb_likely(expr) ecb_expect_true (expr)
786#define ecb_unlikely(expr) ecb_expect_false (expr)
787
788/* count trailing zero bits and count # of one bits */
789#if ECB_GCC_VERSION(3,4)
790 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
791 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
792 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
793 #define ecb_ctz32(x) __builtin_ctz (x)
794 #define ecb_ctz64(x) __builtin_ctzll (x)
795 #define ecb_popcount32(x) __builtin_popcount (x)
796 /* no popcountll */
797#else
798 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
799 ecb_function_ int
800 ecb_ctz32 (uint32_t x)
801 {
802 int r = 0;
803
804 x &= ~x + 1; /* this isolates the lowest bit */
805
806#if ECB_branchless_on_i386
807 r += !!(x & 0xaaaaaaaa) << 0;
808 r += !!(x & 0xcccccccc) << 1;
809 r += !!(x & 0xf0f0f0f0) << 2;
810 r += !!(x & 0xff00ff00) << 3;
811 r += !!(x & 0xffff0000) << 4;
812#else
813 if (x & 0xaaaaaaaa) r += 1;
814 if (x & 0xcccccccc) r += 2;
815 if (x & 0xf0f0f0f0) r += 4;
816 if (x & 0xff00ff00) r += 8;
817 if (x & 0xffff0000) r += 16;
818#endif
819
820 return r;
821 }
822
823 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
824 ecb_function_ int
825 ecb_ctz64 (uint64_t x)
826 {
827 int shift = x & 0xffffffffU ? 0 : 32;
828 return ecb_ctz32 (x >> shift) + shift;
829 }
830
831 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
832 ecb_function_ int
833 ecb_popcount32 (uint32_t x)
834 {
835 x -= (x >> 1) & 0x55555555;
836 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
837 x = ((x >> 4) + x) & 0x0f0f0f0f;
838 x *= 0x01010101;
839
840 return x >> 24;
841 }
842
843 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
844 ecb_function_ int ecb_ld32 (uint32_t x)
845 {
846 int r = 0;
847
848 if (x >> 16) { x >>= 16; r += 16; }
849 if (x >> 8) { x >>= 8; r += 8; }
850 if (x >> 4) { x >>= 4; r += 4; }
851 if (x >> 2) { x >>= 2; r += 2; }
852 if (x >> 1) { r += 1; }
853
854 return r;
855 }
856
857 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
858 ecb_function_ int ecb_ld64 (uint64_t x)
859 {
860 int r = 0;
861
862 if (x >> 32) { x >>= 32; r += 32; }
863
864 return r + ecb_ld32 (x);
865 }
866#endif
867
868ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
869ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
870ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
871ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
872
873ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
874ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
875{
876 return ( (x * 0x0802U & 0x22110U)
877 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
878}
879
880ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
881ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
882{
883 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
884 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
885 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
886 x = ( x >> 8 ) | ( x << 8);
887
888 return x;
889}
890
891ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
892ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
893{
894 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
895 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
896 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
897 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
898 x = ( x >> 16 ) | ( x << 16);
899
900 return x;
901}
902
903/* popcount64 is only available on 64 bit cpus as gcc builtin */
904/* so for this version we are lazy */
905ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
906ecb_function_ int
907ecb_popcount64 (uint64_t x)
908{
909 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
910}
911
912ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
913ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
914ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
915ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
916ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
917ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
918ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
919ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
920
921ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
922ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
923ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
924ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
925ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
926ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
927ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
928ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
929
930#if ECB_GCC_VERSION(4,3)
931 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
932 #define ecb_bswap32(x) __builtin_bswap32 (x)
933 #define ecb_bswap64(x) __builtin_bswap64 (x)
934#else
935 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
936 ecb_function_ uint16_t
937 ecb_bswap16 (uint16_t x)
938 {
939 return ecb_rotl16 (x, 8);
940 }
941
942 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
943 ecb_function_ uint32_t
944 ecb_bswap32 (uint32_t x)
945 {
946 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
947 }
948
949 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
950 ecb_function_ uint64_t
951 ecb_bswap64 (uint64_t x)
952 {
953 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
954 }
955#endif
956
957#if ECB_GCC_VERSION(4,5)
958 #define ecb_unreachable() __builtin_unreachable ()
959#else
960 /* this seems to work fine, but gcc always emits a warning for it :/ */
961 ecb_inline void ecb_unreachable (void) ecb_noreturn;
962 ecb_inline void ecb_unreachable (void) { }
963#endif
964
965/* try to tell the compiler that some condition is definitely true */
966#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
967
968ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
969ecb_inline unsigned char
970ecb_byteorder_helper (void)
971{
972 /* the union code still generates code under pressure in gcc, */
973 /* but less than using pointers, and always seems to */
974 /* successfully return a constant. */
975 /* the reason why we have this horrible preprocessor mess */
976 /* is to avoid it in all cases, at least on common architectures */
977 /* or when using a recent enough gcc version (>= 4.6) */
978#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
979 return 0x44;
980#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
981 return 0x44;
982#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
983 return 0x11;
984#else
985 union
986 {
987 uint32_t i;
988 uint8_t c;
989 } u = { 0x11223344 };
990 return u.c;
991#endif
992}
993
994ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
995ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
996ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
997ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
998
999#if ECB_GCC_VERSION(3,0) || ECB_C99
1000 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1001#else
1002 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1003#endif
1004
1005#if __cplusplus
1006 template<typename T>
1007 static inline T ecb_div_rd (T val, T div)
1008 {
1009 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1010 }
1011 template<typename T>
1012 static inline T ecb_div_ru (T val, T div)
1013 {
1014 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1015 }
1016#else
1017 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1018 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1019#endif
1020
1021#if ecb_cplusplus_does_not_suck
1022 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1023 template<typename T, int N>
1024 static inline int ecb_array_length (const T (&arr)[N])
1025 {
1026 return N;
1027 }
1028#else
1029 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1030#endif
1031
1032/*******************************************************************************/
1033/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1034
1035/* basically, everything uses "ieee pure-endian" floating point numbers */
1036/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1037#if 0 \
1038 || __i386 || __i386__ \
1039 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1040 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1041 || defined __arm__ && defined __ARM_EABI__ \
1042 || defined __s390__ || defined __s390x__ \
1043 || defined __mips__ \
1044 || defined __alpha__ \
1045 || defined __hppa__ \
1046 || defined __ia64__ \
1047 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1048 #define ECB_STDFP 1
1049 #include <string.h> /* for memcpy */
1050#else
1051 #define ECB_STDFP 0
1052 #include <math.h> /* for frexp*, ldexp* */
1053#endif
1054
1055#ifndef ECB_NO_LIBM
1056
1057 /* convert a float to ieee single/binary32 */
1058 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1059 ecb_function_ uint32_t
1060 ecb_float_to_binary32 (float x)
1061 {
1062 uint32_t r;
1063
1064 #if ECB_STDFP
1065 memcpy (&r, &x, 4);
1066 #else
1067 /* slow emulation, works for anything but -0 */
1068 uint32_t m;
1069 int e;
1070
1071 if (x == 0e0f ) return 0x00000000U;
1072 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1073 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1074 if (x != x ) return 0x7fbfffffU;
1075
1076 m = frexpf (x, &e) * 0x1000000U;
1077
1078 r = m & 0x80000000U;
1079
1080 if (r)
1081 m = -m;
1082
1083 if (e <= -126)
1084 {
1085 m &= 0xffffffU;
1086 m >>= (-125 - e);
1087 e = -126;
1088 }
1089
1090 r |= (e + 126) << 23;
1091 r |= m & 0x7fffffU;
1092 #endif
1093
1094 return r;
1095 }
1096
1097 /* converts an ieee single/binary32 to a float */
1098 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1099 ecb_function_ float
1100 ecb_binary32_to_float (uint32_t x)
1101 {
1102 float r;
1103
1104 #if ECB_STDFP
1105 memcpy (&r, &x, 4);
1106 #else
1107 /* emulation, only works for normals and subnormals and +0 */
1108 int neg = x >> 31;
1109 int e = (x >> 23) & 0xffU;
1110
1111 x &= 0x7fffffU;
1112
1113 if (e)
1114 x |= 0x800000U;
1115 else
1116 e = 1;
1117
1118 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1119 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1120
1121 r = neg ? -r : r;
1122 #endif
1123
1124 return r;
1125 }
1126
1127 /* convert a double to ieee double/binary64 */
1128 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1129 ecb_function_ uint64_t
1130 ecb_double_to_binary64 (double x)
1131 {
1132 uint64_t r;
1133
1134 #if ECB_STDFP
1135 memcpy (&r, &x, 8);
1136 #else
1137 /* slow emulation, works for anything but -0 */
1138 uint64_t m;
1139 int e;
1140
1141 if (x == 0e0 ) return 0x0000000000000000U;
1142 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1143 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1144 if (x != x ) return 0X7ff7ffffffffffffU;
1145
1146 m = frexp (x, &e) * 0x20000000000000U;
1147
1148 r = m & 0x8000000000000000;;
1149
1150 if (r)
1151 m = -m;
1152
1153 if (e <= -1022)
1154 {
1155 m &= 0x1fffffffffffffU;
1156 m >>= (-1021 - e);
1157 e = -1022;
1158 }
1159
1160 r |= ((uint64_t)(e + 1022)) << 52;
1161 r |= m & 0xfffffffffffffU;
1162 #endif
1163
1164 return r;
1165 }
1166
1167 /* converts an ieee double/binary64 to a double */
1168 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1169 ecb_function_ double
1170 ecb_binary64_to_double (uint64_t x)
1171 {
1172 double r;
1173
1174 #if ECB_STDFP
1175 memcpy (&r, &x, 8);
1176 #else
1177 /* emulation, only works for normals and subnormals and +0 */
1178 int neg = x >> 63;
1179 int e = (x >> 52) & 0x7ffU;
1180
1181 x &= 0xfffffffffffffU;
1182
1183 if (e)
1184 x |= 0x10000000000000U;
1185 else
1186 e = 1;
1187
1188 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1189 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1190
1191 r = neg ? -r : r;
1192 #endif
1193
1194 return r;
1195 }
1196
1197#endif
1198
1199#endif
1200
1201/* ECB.H END */
1202
1203#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1204/* if your architecture doesn't need memory fences, e.g. because it is
1205 * single-cpu/core, or if you use libev in a project that doesn't use libev
1206 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1207 * libev, in which cases the memory fences become nops.
1208 * alternatively, you can remove this #error and link against libpthread,
1209 * which will then provide the memory fences.
1210 */
1211# error "memory fences not defined for your architecture, please report"
1212#endif
1213
1214#ifndef ECB_MEMORY_FENCE
1215# define ECB_MEMORY_FENCE do { } while (0)
1216# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1217# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1218#endif
1219
1220#define expect_false(cond) ecb_expect_false (cond)
1221#define expect_true(cond) ecb_expect_true (cond)
1222#define noinline ecb_noinline
1223
475#define inline_size static inline 1224#define inline_size ecb_inline
476 1225
477#if EV_FEATURE_CODE 1226#if EV_FEATURE_CODE
478# define inline_speed static inline 1227# define inline_speed ecb_inline
479#else 1228#else
480# define inline_speed static noinline 1229# define inline_speed static noinline
481#endif 1230#endif
482 1231
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1232#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
522# include "ev_win32.c" 1271# include "ev_win32.c"
523#endif 1272#endif
524 1273
525/*****************************************************************************/ 1274/*****************************************************************************/
526 1275
1276/* define a suitable floor function (only used by periodics atm) */
1277
1278#if EV_USE_FLOOR
1279# include <math.h>
1280# define ev_floor(v) floor (v)
1281#else
1282
1283#include <float.h>
1284
1285/* a floor() replacement function, should be independent of ev_tstamp type */
1286static ev_tstamp noinline
1287ev_floor (ev_tstamp v)
1288{
1289 /* the choice of shift factor is not terribly important */
1290#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1291 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1292#else
1293 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1294#endif
1295
1296 /* argument too large for an unsigned long? */
1297 if (expect_false (v >= shift))
1298 {
1299 ev_tstamp f;
1300
1301 if (v == v - 1.)
1302 return v; /* very large number */
1303
1304 f = shift * ev_floor (v * (1. / shift));
1305 return f + ev_floor (v - f);
1306 }
1307
1308 /* special treatment for negative args? */
1309 if (expect_false (v < 0.))
1310 {
1311 ev_tstamp f = -ev_floor (-v);
1312
1313 return f - (f == v ? 0 : 1);
1314 }
1315
1316 /* fits into an unsigned long */
1317 return (unsigned long)v;
1318}
1319
1320#endif
1321
1322/*****************************************************************************/
1323
527#ifdef __linux 1324#ifdef __linux
528# include <sys/utsname.h> 1325# include <sys/utsname.h>
529#endif 1326#endif
530 1327
531static unsigned int noinline 1328static unsigned int noinline ecb_cold
532ev_linux_version (void) 1329ev_linux_version (void)
533{ 1330{
534#ifdef __linux 1331#ifdef __linux
535 unsigned int v = 0; 1332 unsigned int v = 0;
536 struct utsname buf; 1333 struct utsname buf;
… …
565} 1362}
566 1363
567/*****************************************************************************/ 1364/*****************************************************************************/
568 1365
569#if EV_AVOID_STDIO 1366#if EV_AVOID_STDIO
570static void noinline 1367static void noinline ecb_cold
571ev_printerr (const char *msg) 1368ev_printerr (const char *msg)
572{ 1369{
573 write (STDERR_FILENO, msg, strlen (msg)); 1370 write (STDERR_FILENO, msg, strlen (msg));
574} 1371}
575#endif 1372#endif
576 1373
577static void (*syserr_cb)(const char *msg); 1374static void (*syserr_cb)(const char *msg) EV_THROW;
578 1375
579void 1376void ecb_cold
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1377ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
581{ 1378{
582 syserr_cb = cb; 1379 syserr_cb = cb;
583} 1380}
584 1381
585static void noinline 1382static void noinline ecb_cold
586ev_syserr (const char *msg) 1383ev_syserr (const char *msg)
587{ 1384{
588 if (!msg) 1385 if (!msg)
589 msg = "(libev) system error"; 1386 msg = "(libev) system error";
590 1387
… …
603 abort (); 1400 abort ();
604 } 1401 }
605} 1402}
606 1403
607static void * 1404static void *
608ev_realloc_emul (void *ptr, long size) 1405ev_realloc_emul (void *ptr, long size) EV_THROW
609{ 1406{
610#if __GLIBC__
611 return realloc (ptr, size);
612#else
613 /* some systems, notably openbsd and darwin, fail to properly 1407 /* some systems, notably openbsd and darwin, fail to properly
614 * implement realloc (x, 0) (as required by both ansi c-89 and 1408 * implement realloc (x, 0) (as required by both ansi c-89 and
615 * the single unix specification, so work around them here. 1409 * the single unix specification, so work around them here.
1410 * recently, also (at least) fedora and debian started breaking it,
1411 * despite documenting it otherwise.
616 */ 1412 */
617 1413
618 if (size) 1414 if (size)
619 return realloc (ptr, size); 1415 return realloc (ptr, size);
620 1416
621 free (ptr); 1417 free (ptr);
622 return 0; 1418 return 0;
623#endif
624} 1419}
625 1420
626static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1421static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
627 1422
628void 1423void ecb_cold
629ev_set_allocator (void *(*cb)(void *ptr, long size)) 1424ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
630{ 1425{
631 alloc = cb; 1426 alloc = cb;
632} 1427}
633 1428
634inline_speed void * 1429inline_speed void *
… …
722 #undef VAR 1517 #undef VAR
723 }; 1518 };
724 #include "ev_wrap.h" 1519 #include "ev_wrap.h"
725 1520
726 static struct ev_loop default_loop_struct; 1521 static struct ev_loop default_loop_struct;
727 struct ev_loop *ev_default_loop_ptr; 1522 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
728 1523
729#else 1524#else
730 1525
731 ev_tstamp ev_rt_now; 1526 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
732 #define VAR(name,decl) static decl; 1527 #define VAR(name,decl) static decl;
733 #include "ev_vars.h" 1528 #include "ev_vars.h"
734 #undef VAR 1529 #undef VAR
735 1530
736 static int ev_default_loop_ptr; 1531 static int ev_default_loop_ptr;
… …
751 1546
752/*****************************************************************************/ 1547/*****************************************************************************/
753 1548
754#ifndef EV_HAVE_EV_TIME 1549#ifndef EV_HAVE_EV_TIME
755ev_tstamp 1550ev_tstamp
756ev_time (void) 1551ev_time (void) EV_THROW
757{ 1552{
758#if EV_USE_REALTIME 1553#if EV_USE_REALTIME
759 if (expect_true (have_realtime)) 1554 if (expect_true (have_realtime))
760 { 1555 {
761 struct timespec ts; 1556 struct timespec ts;
… …
785 return ev_time (); 1580 return ev_time ();
786} 1581}
787 1582
788#if EV_MULTIPLICITY 1583#if EV_MULTIPLICITY
789ev_tstamp 1584ev_tstamp
790ev_now (EV_P) 1585ev_now (EV_P) EV_THROW
791{ 1586{
792 return ev_rt_now; 1587 return ev_rt_now;
793} 1588}
794#endif 1589#endif
795 1590
796void 1591void
797ev_sleep (ev_tstamp delay) 1592ev_sleep (ev_tstamp delay) EV_THROW
798{ 1593{
799 if (delay > 0.) 1594 if (delay > 0.)
800 { 1595 {
801#if EV_USE_NANOSLEEP 1596#if EV_USE_NANOSLEEP
802 struct timespec ts; 1597 struct timespec ts;
803 1598
804 EV_TS_SET (ts, delay); 1599 EV_TS_SET (ts, delay);
805 nanosleep (&ts, 0); 1600 nanosleep (&ts, 0);
806#elif defined(_WIN32) 1601#elif defined _WIN32
807 Sleep ((unsigned long)(delay * 1e3)); 1602 Sleep ((unsigned long)(delay * 1e3));
808#else 1603#else
809 struct timeval tv; 1604 struct timeval tv;
810 1605
811 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1606 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
815 select (0, 0, 0, 0, &tv); 1610 select (0, 0, 0, 0, &tv);
816#endif 1611#endif
817 } 1612 }
818} 1613}
819 1614
820inline_speed int
821ev_timeout_to_ms (ev_tstamp timeout)
822{
823 int ms = timeout * 1000. + .999999;
824
825 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
826}
827
828/*****************************************************************************/ 1615/*****************************************************************************/
829 1616
830#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1617#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
831 1618
832/* find a suitable new size for the given array, */ 1619/* find a suitable new size for the given array, */
… …
838 1625
839 do 1626 do
840 ncur <<= 1; 1627 ncur <<= 1;
841 while (cnt > ncur); 1628 while (cnt > ncur);
842 1629
843 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1630 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
844 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1631 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
845 { 1632 {
846 ncur *= elem; 1633 ncur *= elem;
847 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1634 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
848 ncur = ncur - sizeof (void *) * 4; 1635 ncur = ncur - sizeof (void *) * 4;
… …
850 } 1637 }
851 1638
852 return ncur; 1639 return ncur;
853} 1640}
854 1641
855static noinline void * 1642static void * noinline ecb_cold
856array_realloc (int elem, void *base, int *cur, int cnt) 1643array_realloc (int elem, void *base, int *cur, int cnt)
857{ 1644{
858 *cur = array_nextsize (elem, *cur, cnt); 1645 *cur = array_nextsize (elem, *cur, cnt);
859 return ev_realloc (base, elem * *cur); 1646 return ev_realloc (base, elem * *cur);
860} 1647}
… …
863 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1650 memset ((void *)(base), 0, sizeof (*(base)) * (count))
864 1651
865#define array_needsize(type,base,cur,cnt,init) \ 1652#define array_needsize(type,base,cur,cnt,init) \
866 if (expect_false ((cnt) > (cur))) \ 1653 if (expect_false ((cnt) > (cur))) \
867 { \ 1654 { \
868 int ocur_ = (cur); \ 1655 int ecb_unused ocur_ = (cur); \
869 (base) = (type *)array_realloc \ 1656 (base) = (type *)array_realloc \
870 (sizeof (type), (base), &(cur), (cnt)); \ 1657 (sizeof (type), (base), &(cur), (cnt)); \
871 init ((base) + (ocur_), (cur) - ocur_); \ 1658 init ((base) + (ocur_), (cur) - ocur_); \
872 } 1659 }
873 1660
… …
891pendingcb (EV_P_ ev_prepare *w, int revents) 1678pendingcb (EV_P_ ev_prepare *w, int revents)
892{ 1679{
893} 1680}
894 1681
895void noinline 1682void noinline
896ev_feed_event (EV_P_ void *w, int revents) 1683ev_feed_event (EV_P_ void *w, int revents) EV_THROW
897{ 1684{
898 W w_ = (W)w; 1685 W w_ = (W)w;
899 int pri = ABSPRI (w_); 1686 int pri = ABSPRI (w_);
900 1687
901 if (expect_false (w_->pending)) 1688 if (expect_false (w_->pending))
… …
905 w_->pending = ++pendingcnt [pri]; 1692 w_->pending = ++pendingcnt [pri];
906 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1693 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
907 pendings [pri][w_->pending - 1].w = w_; 1694 pendings [pri][w_->pending - 1].w = w_;
908 pendings [pri][w_->pending - 1].events = revents; 1695 pendings [pri][w_->pending - 1].events = revents;
909 } 1696 }
1697
1698 pendingpri = NUMPRI - 1;
910} 1699}
911 1700
912inline_speed void 1701inline_speed void
913feed_reverse (EV_P_ W w) 1702feed_reverse (EV_P_ W w)
914{ 1703{
… …
960 if (expect_true (!anfd->reify)) 1749 if (expect_true (!anfd->reify))
961 fd_event_nocheck (EV_A_ fd, revents); 1750 fd_event_nocheck (EV_A_ fd, revents);
962} 1751}
963 1752
964void 1753void
965ev_feed_fd_event (EV_P_ int fd, int revents) 1754ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
966{ 1755{
967 if (fd >= 0 && fd < anfdmax) 1756 if (fd >= 0 && fd < anfdmax)
968 fd_event_nocheck (EV_A_ fd, revents); 1757 fd_event_nocheck (EV_A_ fd, revents);
969} 1758}
970 1759
… …
973inline_size void 1762inline_size void
974fd_reify (EV_P) 1763fd_reify (EV_P)
975{ 1764{
976 int i; 1765 int i;
977 1766
1767#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1768 for (i = 0; i < fdchangecnt; ++i)
1769 {
1770 int fd = fdchanges [i];
1771 ANFD *anfd = anfds + fd;
1772
1773 if (anfd->reify & EV__IOFDSET && anfd->head)
1774 {
1775 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1776
1777 if (handle != anfd->handle)
1778 {
1779 unsigned long arg;
1780
1781 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1782
1783 /* handle changed, but fd didn't - we need to do it in two steps */
1784 backend_modify (EV_A_ fd, anfd->events, 0);
1785 anfd->events = 0;
1786 anfd->handle = handle;
1787 }
1788 }
1789 }
1790#endif
1791
978 for (i = 0; i < fdchangecnt; ++i) 1792 for (i = 0; i < fdchangecnt; ++i)
979 { 1793 {
980 int fd = fdchanges [i]; 1794 int fd = fdchanges [i];
981 ANFD *anfd = anfds + fd; 1795 ANFD *anfd = anfds + fd;
982 ev_io *w; 1796 ev_io *w;
… …
984 unsigned char o_events = anfd->events; 1798 unsigned char o_events = anfd->events;
985 unsigned char o_reify = anfd->reify; 1799 unsigned char o_reify = anfd->reify;
986 1800
987 anfd->reify = 0; 1801 anfd->reify = 0;
988 1802
989#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
990 if (o_reify & EV__IOFDSET)
991 {
992 unsigned long arg;
993 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
994 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
995 printf ("oi %d %x\n", fd, anfd->handle);//D
996 }
997#endif
998
999 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1803 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1000 { 1804 {
1001 anfd->events = 0; 1805 anfd->events = 0;
1002 1806
1003 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1807 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1028 fdchanges [fdchangecnt - 1] = fd; 1832 fdchanges [fdchangecnt - 1] = fd;
1029 } 1833 }
1030} 1834}
1031 1835
1032/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1836/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1033inline_speed void 1837inline_speed void ecb_cold
1034fd_kill (EV_P_ int fd) 1838fd_kill (EV_P_ int fd)
1035{ 1839{
1036 ev_io *w; 1840 ev_io *w;
1037 1841
1038 while ((w = (ev_io *)anfds [fd].head)) 1842 while ((w = (ev_io *)anfds [fd].head))
… …
1041 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1845 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1042 } 1846 }
1043} 1847}
1044 1848
1045/* check whether the given fd is actually valid, for error recovery */ 1849/* check whether the given fd is actually valid, for error recovery */
1046inline_size int 1850inline_size int ecb_cold
1047fd_valid (int fd) 1851fd_valid (int fd)
1048{ 1852{
1049#ifdef _WIN32 1853#ifdef _WIN32
1050 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1854 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1051#else 1855#else
1052 return fcntl (fd, F_GETFD) != -1; 1856 return fcntl (fd, F_GETFD) != -1;
1053#endif 1857#endif
1054} 1858}
1055 1859
1056/* called on EBADF to verify fds */ 1860/* called on EBADF to verify fds */
1057static void noinline 1861static void noinline ecb_cold
1058fd_ebadf (EV_P) 1862fd_ebadf (EV_P)
1059{ 1863{
1060 int fd; 1864 int fd;
1061 1865
1062 for (fd = 0; fd < anfdmax; ++fd) 1866 for (fd = 0; fd < anfdmax; ++fd)
… …
1064 if (!fd_valid (fd) && errno == EBADF) 1868 if (!fd_valid (fd) && errno == EBADF)
1065 fd_kill (EV_A_ fd); 1869 fd_kill (EV_A_ fd);
1066} 1870}
1067 1871
1068/* called on ENOMEM in select/poll to kill some fds and retry */ 1872/* called on ENOMEM in select/poll to kill some fds and retry */
1069static void noinline 1873static void noinline ecb_cold
1070fd_enomem (EV_P) 1874fd_enomem (EV_P)
1071{ 1875{
1072 int fd; 1876 int fd;
1073 1877
1074 for (fd = anfdmax; fd--; ) 1878 for (fd = anfdmax; fd--; )
… …
1269 2073
1270/*****************************************************************************/ 2074/*****************************************************************************/
1271 2075
1272#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2076#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1273 2077
1274static void noinline 2078static void noinline ecb_cold
1275evpipe_init (EV_P) 2079evpipe_init (EV_P)
1276{ 2080{
1277 if (!ev_is_active (&pipe_w)) 2081 if (!ev_is_active (&pipe_w))
1278 { 2082 {
2083 int fds [2];
2084
1279# if EV_USE_EVENTFD 2085# if EV_USE_EVENTFD
2086 fds [0] = -1;
1280 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2087 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1281 if (evfd < 0 && errno == EINVAL) 2088 if (fds [1] < 0 && errno == EINVAL)
1282 evfd = eventfd (0, 0); 2089 fds [1] = eventfd (0, 0);
1283 2090
1284 if (evfd >= 0) 2091 if (fds [1] < 0)
2092# endif
1285 { 2093 {
2094 while (pipe (fds))
2095 ev_syserr ("(libev) error creating signal/async pipe");
2096
2097 fd_intern (fds [0]);
2098 }
2099
2100 fd_intern (fds [1]);
2101
1286 evpipe [0] = -1; 2102 evpipe [0] = fds [0];
1287 fd_intern (evfd); /* doing it twice doesn't hurt */ 2103
1288 ev_io_set (&pipe_w, evfd, EV_READ); 2104 if (evpipe [1] < 0)
2105 evpipe [1] = fds [1]; /* first call, set write fd */
2106 else
2107 {
2108 /* on subsequent calls, do not change evpipe [1] */
2109 /* so that evpipe_write can always rely on its value. */
2110 /* this branch does not do anything sensible on windows, */
2111 /* so must not be executed on windows */
2112
2113 dup2 (fds [1], evpipe [1]);
2114 close (fds [1]);
2115 }
2116
2117 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2118 ev_io_start (EV_A_ &pipe_w);
2119 ev_unref (EV_A); /* watcher should not keep loop alive */
2120 }
2121}
2122
2123inline_speed void
2124evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2125{
2126 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2127
2128 if (expect_true (*flag))
2129 return;
2130
2131 *flag = 1;
2132 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2133
2134 pipe_write_skipped = 1;
2135
2136 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2137
2138 if (pipe_write_wanted)
2139 {
2140 int old_errno;
2141
2142 pipe_write_skipped = 0;
2143 ECB_MEMORY_FENCE_RELEASE;
2144
2145 old_errno = errno; /* save errno because write will clobber it */
2146
2147#if EV_USE_EVENTFD
2148 if (evpipe [0] < 0)
2149 {
2150 uint64_t counter = 1;
2151 write (evpipe [1], &counter, sizeof (uint64_t));
1289 } 2152 }
1290 else 2153 else
1291# endif 2154#endif
1292 { 2155 {
1293 while (pipe (evpipe)) 2156#ifdef _WIN32
1294 ev_syserr ("(libev) error creating signal/async pipe"); 2157 WSABUF buf;
1295 2158 DWORD sent;
1296 fd_intern (evpipe [0]); 2159 buf.buf = &buf;
1297 fd_intern (evpipe [1]); 2160 buf.len = 1;
1298 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2161 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2162#else
2163 write (evpipe [1], &(evpipe [1]), 1);
2164#endif
1299 } 2165 }
1300
1301 ev_io_start (EV_A_ &pipe_w);
1302 ev_unref (EV_A); /* watcher should not keep loop alive */
1303 }
1304}
1305
1306inline_size void
1307evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1308{
1309 if (!*flag)
1310 {
1311 int old_errno = errno; /* save errno because write might clobber it */
1312 char dummy;
1313
1314 *flag = 1;
1315
1316#if EV_USE_EVENTFD
1317 if (evfd >= 0)
1318 {
1319 uint64_t counter = 1;
1320 write (evfd, &counter, sizeof (uint64_t));
1321 }
1322 else
1323#endif
1324 /* win32 people keep sending patches that change this write() to send() */
1325 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1326 /* so when you think this write should be a send instead, please find out */
1327 /* where your send() is from - it's definitely not the microsoft send, and */
1328 /* tell me. thank you. */
1329 write (evpipe [1], &dummy, 1);
1330 2166
1331 errno = old_errno; 2167 errno = old_errno;
1332 } 2168 }
1333} 2169}
1334 2170
… …
1337static void 2173static void
1338pipecb (EV_P_ ev_io *iow, int revents) 2174pipecb (EV_P_ ev_io *iow, int revents)
1339{ 2175{
1340 int i; 2176 int i;
1341 2177
2178 if (revents & EV_READ)
2179 {
1342#if EV_USE_EVENTFD 2180#if EV_USE_EVENTFD
1343 if (evfd >= 0) 2181 if (evpipe [0] < 0)
1344 { 2182 {
1345 uint64_t counter; 2183 uint64_t counter;
1346 read (evfd, &counter, sizeof (uint64_t)); 2184 read (evpipe [1], &counter, sizeof (uint64_t));
1347 } 2185 }
1348 else 2186 else
1349#endif 2187#endif
1350 { 2188 {
1351 char dummy; 2189 char dummy[4];
1352 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2190#ifdef _WIN32
2191 WSABUF buf;
2192 DWORD recvd;
2193 DWORD flags = 0;
2194 buf.buf = dummy;
2195 buf.len = sizeof (dummy);
2196 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2197#else
1353 read (evpipe [0], &dummy, 1); 2198 read (evpipe [0], &dummy, sizeof (dummy));
2199#endif
2200 }
1354 } 2201 }
1355 2202
2203 pipe_write_skipped = 0;
2204
2205 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2206
2207#if EV_SIGNAL_ENABLE
1356 if (sig_pending) 2208 if (sig_pending)
1357 { 2209 {
1358 sig_pending = 0; 2210 sig_pending = 0;
2211
2212 ECB_MEMORY_FENCE;
1359 2213
1360 for (i = EV_NSIG - 1; i--; ) 2214 for (i = EV_NSIG - 1; i--; )
1361 if (expect_false (signals [i].pending)) 2215 if (expect_false (signals [i].pending))
1362 ev_feed_signal_event (EV_A_ i + 1); 2216 ev_feed_signal_event (EV_A_ i + 1);
1363 } 2217 }
2218#endif
1364 2219
1365#if EV_ASYNC_ENABLE 2220#if EV_ASYNC_ENABLE
1366 if (async_pending) 2221 if (async_pending)
1367 { 2222 {
1368 async_pending = 0; 2223 async_pending = 0;
2224
2225 ECB_MEMORY_FENCE;
1369 2226
1370 for (i = asynccnt; i--; ) 2227 for (i = asynccnt; i--; )
1371 if (asyncs [i]->sent) 2228 if (asyncs [i]->sent)
1372 { 2229 {
1373 asyncs [i]->sent = 0; 2230 asyncs [i]->sent = 0;
2231 ECB_MEMORY_FENCE_RELEASE;
1374 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2232 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1375 } 2233 }
1376 } 2234 }
1377#endif 2235#endif
1378} 2236}
1379 2237
1380/*****************************************************************************/ 2238/*****************************************************************************/
1381 2239
1382void 2240void
1383ev_feed_signal (int signum) 2241ev_feed_signal (int signum) EV_THROW
1384{ 2242{
1385#if EV_MULTIPLICITY 2243#if EV_MULTIPLICITY
2244 EV_P;
2245 ECB_MEMORY_FENCE_ACQUIRE;
1386 EV_P = signals [signum - 1].loop; 2246 EV_A = signals [signum - 1].loop;
1387 2247
1388 if (!EV_A) 2248 if (!EV_A)
1389 return; 2249 return;
1390#endif 2250#endif
1391 2251
… …
1402 2262
1403 ev_feed_signal (signum); 2263 ev_feed_signal (signum);
1404} 2264}
1405 2265
1406void noinline 2266void noinline
1407ev_feed_signal_event (EV_P_ int signum) 2267ev_feed_signal_event (EV_P_ int signum) EV_THROW
1408{ 2268{
1409 WL w; 2269 WL w;
1410 2270
1411 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2271 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1412 return; 2272 return;
1413 2273
1414 --signum; 2274 --signum;
1415 2275
1416#if EV_MULTIPLICITY 2276#if EV_MULTIPLICITY
… …
1420 if (expect_false (signals [signum].loop != EV_A)) 2280 if (expect_false (signals [signum].loop != EV_A))
1421 return; 2281 return;
1422#endif 2282#endif
1423 2283
1424 signals [signum].pending = 0; 2284 signals [signum].pending = 0;
2285 ECB_MEMORY_FENCE_RELEASE;
1425 2286
1426 for (w = signals [signum].head; w; w = w->next) 2287 for (w = signals [signum].head; w; w = w->next)
1427 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2288 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1428} 2289}
1429 2290
… …
1527#endif 2388#endif
1528#if EV_USE_SELECT 2389#if EV_USE_SELECT
1529# include "ev_select.c" 2390# include "ev_select.c"
1530#endif 2391#endif
1531 2392
1532int 2393int ecb_cold
1533ev_version_major (void) 2394ev_version_major (void) EV_THROW
1534{ 2395{
1535 return EV_VERSION_MAJOR; 2396 return EV_VERSION_MAJOR;
1536} 2397}
1537 2398
1538int 2399int ecb_cold
1539ev_version_minor (void) 2400ev_version_minor (void) EV_THROW
1540{ 2401{
1541 return EV_VERSION_MINOR; 2402 return EV_VERSION_MINOR;
1542} 2403}
1543 2404
1544/* return true if we are running with elevated privileges and should ignore env variables */ 2405/* return true if we are running with elevated privileges and should ignore env variables */
1545int inline_size 2406int inline_size ecb_cold
1546enable_secure (void) 2407enable_secure (void)
1547{ 2408{
1548#ifdef _WIN32 2409#ifdef _WIN32
1549 return 0; 2410 return 0;
1550#else 2411#else
1551 return getuid () != geteuid () 2412 return getuid () != geteuid ()
1552 || getgid () != getegid (); 2413 || getgid () != getegid ();
1553#endif 2414#endif
1554} 2415}
1555 2416
1556unsigned int 2417unsigned int ecb_cold
1557ev_supported_backends (void) 2418ev_supported_backends (void) EV_THROW
1558{ 2419{
1559 unsigned int flags = 0; 2420 unsigned int flags = 0;
1560 2421
1561 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2422 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1562 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2423 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1565 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2426 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1566 2427
1567 return flags; 2428 return flags;
1568} 2429}
1569 2430
1570unsigned int 2431unsigned int ecb_cold
1571ev_recommended_backends (void) 2432ev_recommended_backends (void) EV_THROW
1572{ 2433{
1573 unsigned int flags = ev_supported_backends (); 2434 unsigned int flags = ev_supported_backends ();
1574 2435
1575#ifndef __NetBSD__ 2436#ifndef __NetBSD__
1576 /* kqueue is borked on everything but netbsd apparently */ 2437 /* kqueue is borked on everything but netbsd apparently */
… …
1587#endif 2448#endif
1588 2449
1589 return flags; 2450 return flags;
1590} 2451}
1591 2452
1592unsigned int 2453unsigned int ecb_cold
1593ev_embeddable_backends (void) 2454ev_embeddable_backends (void) EV_THROW
1594{ 2455{
1595 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2456 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1596 2457
1597 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2458 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1598 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2459 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1600 2461
1601 return flags; 2462 return flags;
1602} 2463}
1603 2464
1604unsigned int 2465unsigned int
1605ev_backend (EV_P) 2466ev_backend (EV_P) EV_THROW
1606{ 2467{
1607 return backend; 2468 return backend;
1608} 2469}
1609 2470
1610#if EV_FEATURE_API 2471#if EV_FEATURE_API
1611unsigned int 2472unsigned int
1612ev_iteration (EV_P) 2473ev_iteration (EV_P) EV_THROW
1613{ 2474{
1614 return loop_count; 2475 return loop_count;
1615} 2476}
1616 2477
1617unsigned int 2478unsigned int
1618ev_depth (EV_P) 2479ev_depth (EV_P) EV_THROW
1619{ 2480{
1620 return loop_depth; 2481 return loop_depth;
1621} 2482}
1622 2483
1623void 2484void
1624ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2485ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1625{ 2486{
1626 io_blocktime = interval; 2487 io_blocktime = interval;
1627} 2488}
1628 2489
1629void 2490void
1630ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2491ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1631{ 2492{
1632 timeout_blocktime = interval; 2493 timeout_blocktime = interval;
1633} 2494}
1634 2495
1635void 2496void
1636ev_set_userdata (EV_P_ void *data) 2497ev_set_userdata (EV_P_ void *data) EV_THROW
1637{ 2498{
1638 userdata = data; 2499 userdata = data;
1639} 2500}
1640 2501
1641void * 2502void *
1642ev_userdata (EV_P) 2503ev_userdata (EV_P) EV_THROW
1643{ 2504{
1644 return userdata; 2505 return userdata;
1645} 2506}
1646 2507
2508void
1647void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2509ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1648{ 2510{
1649 invoke_cb = invoke_pending_cb; 2511 invoke_cb = invoke_pending_cb;
1650} 2512}
1651 2513
2514void
1652void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2515ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1653{ 2516{
1654 release_cb = release; 2517 release_cb = release;
1655 acquire_cb = acquire; 2518 acquire_cb = acquire;
1656} 2519}
1657#endif 2520#endif
1658 2521
1659/* initialise a loop structure, must be zero-initialised */ 2522/* initialise a loop structure, must be zero-initialised */
1660static void noinline 2523static void noinline ecb_cold
1661loop_init (EV_P_ unsigned int flags) 2524loop_init (EV_P_ unsigned int flags) EV_THROW
1662{ 2525{
1663 if (!backend) 2526 if (!backend)
1664 { 2527 {
1665 origflags = flags; 2528 origflags = flags;
1666 2529
… …
1693 if (!(flags & EVFLAG_NOENV) 2556 if (!(flags & EVFLAG_NOENV)
1694 && !enable_secure () 2557 && !enable_secure ()
1695 && getenv ("LIBEV_FLAGS")) 2558 && getenv ("LIBEV_FLAGS"))
1696 flags = atoi (getenv ("LIBEV_FLAGS")); 2559 flags = atoi (getenv ("LIBEV_FLAGS"));
1697 2560
1698 ev_rt_now = ev_time (); 2561 ev_rt_now = ev_time ();
1699 mn_now = get_clock (); 2562 mn_now = get_clock ();
1700 now_floor = mn_now; 2563 now_floor = mn_now;
1701 rtmn_diff = ev_rt_now - mn_now; 2564 rtmn_diff = ev_rt_now - mn_now;
1702#if EV_FEATURE_API 2565#if EV_FEATURE_API
1703 invoke_cb = ev_invoke_pending; 2566 invoke_cb = ev_invoke_pending;
1704#endif 2567#endif
1705 2568
1706 io_blocktime = 0.; 2569 io_blocktime = 0.;
1707 timeout_blocktime = 0.; 2570 timeout_blocktime = 0.;
1708 backend = 0; 2571 backend = 0;
1709 backend_fd = -1; 2572 backend_fd = -1;
1710 sig_pending = 0; 2573 sig_pending = 0;
1711#if EV_ASYNC_ENABLE 2574#if EV_ASYNC_ENABLE
1712 async_pending = 0; 2575 async_pending = 0;
1713#endif 2576#endif
2577 pipe_write_skipped = 0;
2578 pipe_write_wanted = 0;
2579 evpipe [0] = -1;
2580 evpipe [1] = -1;
1714#if EV_USE_INOTIFY 2581#if EV_USE_INOTIFY
1715 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2582 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1716#endif 2583#endif
1717#if EV_USE_SIGNALFD 2584#if EV_USE_SIGNALFD
1718 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2585 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1719#endif 2586#endif
1720 2587
1721 if (!(flags & EVBACKEND_MASK)) 2588 if (!(flags & EVBACKEND_MASK))
1722 flags |= ev_recommended_backends (); 2589 flags |= ev_recommended_backends ();
1723 2590
… …
1748#endif 2615#endif
1749 } 2616 }
1750} 2617}
1751 2618
1752/* free up a loop structure */ 2619/* free up a loop structure */
1753void 2620void ecb_cold
1754ev_loop_destroy (EV_P) 2621ev_loop_destroy (EV_P)
1755{ 2622{
1756 int i; 2623 int i;
1757 2624
1758#if EV_MULTIPLICITY 2625#if EV_MULTIPLICITY
… …
1769 EV_INVOKE_PENDING; 2636 EV_INVOKE_PENDING;
1770 } 2637 }
1771#endif 2638#endif
1772 2639
1773#if EV_CHILD_ENABLE 2640#if EV_CHILD_ENABLE
1774 if (ev_is_active (&childev)) 2641 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1775 { 2642 {
1776 ev_ref (EV_A); /* child watcher */ 2643 ev_ref (EV_A); /* child watcher */
1777 ev_signal_stop (EV_A_ &childev); 2644 ev_signal_stop (EV_A_ &childev);
1778 } 2645 }
1779#endif 2646#endif
… …
1781 if (ev_is_active (&pipe_w)) 2648 if (ev_is_active (&pipe_w))
1782 { 2649 {
1783 /*ev_ref (EV_A);*/ 2650 /*ev_ref (EV_A);*/
1784 /*ev_io_stop (EV_A_ &pipe_w);*/ 2651 /*ev_io_stop (EV_A_ &pipe_w);*/
1785 2652
1786#if EV_USE_EVENTFD
1787 if (evfd >= 0)
1788 close (evfd);
1789#endif
1790
1791 if (evpipe [0] >= 0)
1792 {
1793 EV_WIN32_CLOSE_FD (evpipe [0]); 2653 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1794 EV_WIN32_CLOSE_FD (evpipe [1]); 2654 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1795 }
1796 } 2655 }
1797 2656
1798#if EV_USE_SIGNALFD 2657#if EV_USE_SIGNALFD
1799 if (ev_is_active (&sigfd_w)) 2658 if (ev_is_active (&sigfd_w))
1800 close (sigfd); 2659 close (sigfd);
… …
1886#endif 2745#endif
1887#if EV_USE_INOTIFY 2746#if EV_USE_INOTIFY
1888 infy_fork (EV_A); 2747 infy_fork (EV_A);
1889#endif 2748#endif
1890 2749
2750#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1891 if (ev_is_active (&pipe_w)) 2751 if (ev_is_active (&pipe_w))
1892 { 2752 {
1893 /* this "locks" the handlers against writing to the pipe */ 2753 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1894 /* while we modify the fd vars */
1895 sig_pending = 1;
1896#if EV_ASYNC_ENABLE
1897 async_pending = 1;
1898#endif
1899 2754
1900 ev_ref (EV_A); 2755 ev_ref (EV_A);
1901 ev_io_stop (EV_A_ &pipe_w); 2756 ev_io_stop (EV_A_ &pipe_w);
1902 2757
1903#if EV_USE_EVENTFD
1904 if (evfd >= 0)
1905 close (evfd);
1906#endif
1907
1908 if (evpipe [0] >= 0) 2758 if (evpipe [0] >= 0)
1909 {
1910 EV_WIN32_CLOSE_FD (evpipe [0]); 2759 EV_WIN32_CLOSE_FD (evpipe [0]);
1911 EV_WIN32_CLOSE_FD (evpipe [1]);
1912 }
1913 2760
1914#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1915 evpipe_init (EV_A); 2761 evpipe_init (EV_A);
1916 /* now iterate over everything, in case we missed something */ 2762 /* iterate over everything, in case we missed something before */
1917 pipecb (EV_A_ &pipe_w, EV_READ); 2763 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1918#endif
1919 } 2764 }
2765#endif
1920 2766
1921 postfork = 0; 2767 postfork = 0;
1922} 2768}
1923 2769
1924#if EV_MULTIPLICITY 2770#if EV_MULTIPLICITY
1925 2771
1926struct ev_loop * 2772struct ev_loop * ecb_cold
1927ev_loop_new (unsigned int flags) 2773ev_loop_new (unsigned int flags) EV_THROW
1928{ 2774{
1929 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2775 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1930 2776
1931 memset (EV_A, 0, sizeof (struct ev_loop)); 2777 memset (EV_A, 0, sizeof (struct ev_loop));
1932 loop_init (EV_A_ flags); 2778 loop_init (EV_A_ flags);
… …
1939} 2785}
1940 2786
1941#endif /* multiplicity */ 2787#endif /* multiplicity */
1942 2788
1943#if EV_VERIFY 2789#if EV_VERIFY
1944static void noinline 2790static void noinline ecb_cold
1945verify_watcher (EV_P_ W w) 2791verify_watcher (EV_P_ W w)
1946{ 2792{
1947 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2793 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1948 2794
1949 if (w->pending) 2795 if (w->pending)
1950 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2796 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1951} 2797}
1952 2798
1953static void noinline 2799static void noinline ecb_cold
1954verify_heap (EV_P_ ANHE *heap, int N) 2800verify_heap (EV_P_ ANHE *heap, int N)
1955{ 2801{
1956 int i; 2802 int i;
1957 2803
1958 for (i = HEAP0; i < N + HEAP0; ++i) 2804 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1963 2809
1964 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2810 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1965 } 2811 }
1966} 2812}
1967 2813
1968static void noinline 2814static void noinline ecb_cold
1969array_verify (EV_P_ W *ws, int cnt) 2815array_verify (EV_P_ W *ws, int cnt)
1970{ 2816{
1971 while (cnt--) 2817 while (cnt--)
1972 { 2818 {
1973 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2819 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1975 } 2821 }
1976} 2822}
1977#endif 2823#endif
1978 2824
1979#if EV_FEATURE_API 2825#if EV_FEATURE_API
1980void 2826void ecb_cold
1981ev_verify (EV_P) 2827ev_verify (EV_P) EV_THROW
1982{ 2828{
1983#if EV_VERIFY 2829#if EV_VERIFY
1984 int i; 2830 int i;
1985 WL w; 2831 WL w, w2;
1986 2832
1987 assert (activecnt >= -1); 2833 assert (activecnt >= -1);
1988 2834
1989 assert (fdchangemax >= fdchangecnt); 2835 assert (fdchangemax >= fdchangecnt);
1990 for (i = 0; i < fdchangecnt; ++i) 2836 for (i = 0; i < fdchangecnt; ++i)
1991 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2837 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1992 2838
1993 assert (anfdmax >= 0); 2839 assert (anfdmax >= 0);
1994 for (i = 0; i < anfdmax; ++i) 2840 for (i = 0; i < anfdmax; ++i)
2841 {
2842 int j = 0;
2843
1995 for (w = anfds [i].head; w; w = w->next) 2844 for (w = w2 = anfds [i].head; w; w = w->next)
1996 { 2845 {
1997 verify_watcher (EV_A_ (W)w); 2846 verify_watcher (EV_A_ (W)w);
2847
2848 if (j++ & 1)
2849 {
2850 assert (("libev: io watcher list contains a loop", w != w2));
2851 w2 = w2->next;
2852 }
2853
1998 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2854 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1999 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2855 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2000 } 2856 }
2857 }
2001 2858
2002 assert (timermax >= timercnt); 2859 assert (timermax >= timercnt);
2003 verify_heap (EV_A_ timers, timercnt); 2860 verify_heap (EV_A_ timers, timercnt);
2004 2861
2005#if EV_PERIODIC_ENABLE 2862#if EV_PERIODIC_ENABLE
… …
2051#endif 2908#endif
2052} 2909}
2053#endif 2910#endif
2054 2911
2055#if EV_MULTIPLICITY 2912#if EV_MULTIPLICITY
2056struct ev_loop * 2913struct ev_loop * ecb_cold
2057#else 2914#else
2058int 2915int
2059#endif 2916#endif
2060ev_default_loop (unsigned int flags) 2917ev_default_loop (unsigned int flags) EV_THROW
2061{ 2918{
2062 if (!ev_default_loop_ptr) 2919 if (!ev_default_loop_ptr)
2063 { 2920 {
2064#if EV_MULTIPLICITY 2921#if EV_MULTIPLICITY
2065 EV_P = ev_default_loop_ptr = &default_loop_struct; 2922 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2084 2941
2085 return ev_default_loop_ptr; 2942 return ev_default_loop_ptr;
2086} 2943}
2087 2944
2088void 2945void
2089ev_loop_fork (EV_P) 2946ev_loop_fork (EV_P) EV_THROW
2090{ 2947{
2091 postfork = 1; /* must be in line with ev_default_fork */ 2948 postfork = 1;
2092} 2949}
2093 2950
2094/*****************************************************************************/ 2951/*****************************************************************************/
2095 2952
2096void 2953void
… …
2098{ 2955{
2099 EV_CB_INVOKE ((W)w, revents); 2956 EV_CB_INVOKE ((W)w, revents);
2100} 2957}
2101 2958
2102unsigned int 2959unsigned int
2103ev_pending_count (EV_P) 2960ev_pending_count (EV_P) EV_THROW
2104{ 2961{
2105 int pri; 2962 int pri;
2106 unsigned int count = 0; 2963 unsigned int count = 0;
2107 2964
2108 for (pri = NUMPRI; pri--; ) 2965 for (pri = NUMPRI; pri--; )
… …
2112} 2969}
2113 2970
2114void noinline 2971void noinline
2115ev_invoke_pending (EV_P) 2972ev_invoke_pending (EV_P)
2116{ 2973{
2117 int pri; 2974 pendingpri = NUMPRI;
2118 2975
2119 for (pri = NUMPRI; pri--; ) 2976 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2977 {
2978 --pendingpri;
2979
2120 while (pendingcnt [pri]) 2980 while (pendingcnt [pendingpri])
2121 { 2981 {
2122 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2982 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2123 2983
2124 p->w->pending = 0; 2984 p->w->pending = 0;
2125 EV_CB_INVOKE (p->w, p->events); 2985 EV_CB_INVOKE (p->w, p->events);
2126 EV_FREQUENT_CHECK; 2986 EV_FREQUENT_CHECK;
2127 } 2987 }
2988 }
2128} 2989}
2129 2990
2130#if EV_IDLE_ENABLE 2991#if EV_IDLE_ENABLE
2131/* make idle watchers pending. this handles the "call-idle */ 2992/* make idle watchers pending. this handles the "call-idle */
2132/* only when higher priorities are idle" logic */ 2993/* only when higher priorities are idle" logic */
… …
2189 feed_reverse_done (EV_A_ EV_TIMER); 3050 feed_reverse_done (EV_A_ EV_TIMER);
2190 } 3051 }
2191} 3052}
2192 3053
2193#if EV_PERIODIC_ENABLE 3054#if EV_PERIODIC_ENABLE
3055
3056static void noinline
3057periodic_recalc (EV_P_ ev_periodic *w)
3058{
3059 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3060 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3061
3062 /* the above almost always errs on the low side */
3063 while (at <= ev_rt_now)
3064 {
3065 ev_tstamp nat = at + w->interval;
3066
3067 /* when resolution fails us, we use ev_rt_now */
3068 if (expect_false (nat == at))
3069 {
3070 at = ev_rt_now;
3071 break;
3072 }
3073
3074 at = nat;
3075 }
3076
3077 ev_at (w) = at;
3078}
3079
2194/* make periodics pending */ 3080/* make periodics pending */
2195inline_size void 3081inline_size void
2196periodics_reify (EV_P) 3082periodics_reify (EV_P)
2197{ 3083{
2198 EV_FREQUENT_CHECK; 3084 EV_FREQUENT_CHECK;
2199 3085
2200 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3086 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2201 { 3087 {
2202 int feed_count = 0;
2203
2204 do 3088 do
2205 { 3089 {
2206 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3090 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2207 3091
2208 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3092 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2217 ANHE_at_cache (periodics [HEAP0]); 3101 ANHE_at_cache (periodics [HEAP0]);
2218 downheap (periodics, periodiccnt, HEAP0); 3102 downheap (periodics, periodiccnt, HEAP0);
2219 } 3103 }
2220 else if (w->interval) 3104 else if (w->interval)
2221 { 3105 {
2222 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3106 periodic_recalc (EV_A_ w);
2223 /* if next trigger time is not sufficiently in the future, put it there */
2224 /* this might happen because of floating point inexactness */
2225 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2226 {
2227 ev_at (w) += w->interval;
2228
2229 /* if interval is unreasonably low we might still have a time in the past */
2230 /* so correct this. this will make the periodic very inexact, but the user */
2231 /* has effectively asked to get triggered more often than possible */
2232 if (ev_at (w) < ev_rt_now)
2233 ev_at (w) = ev_rt_now;
2234 }
2235
2236 ANHE_at_cache (periodics [HEAP0]); 3107 ANHE_at_cache (periodics [HEAP0]);
2237 downheap (periodics, periodiccnt, HEAP0); 3108 downheap (periodics, periodiccnt, HEAP0);
2238 } 3109 }
2239 else 3110 else
2240 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3111 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2248 } 3119 }
2249} 3120}
2250 3121
2251/* simply recalculate all periodics */ 3122/* simply recalculate all periodics */
2252/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3123/* TODO: maybe ensure that at least one event happens when jumping forward? */
2253static void noinline 3124static void noinline ecb_cold
2254periodics_reschedule (EV_P) 3125periodics_reschedule (EV_P)
2255{ 3126{
2256 int i; 3127 int i;
2257 3128
2258 /* adjust periodics after time jump */ 3129 /* adjust periodics after time jump */
… …
2261 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3132 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2262 3133
2263 if (w->reschedule_cb) 3134 if (w->reschedule_cb)
2264 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3135 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2265 else if (w->interval) 3136 else if (w->interval)
2266 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3137 periodic_recalc (EV_A_ w);
2267 3138
2268 ANHE_at_cache (periodics [i]); 3139 ANHE_at_cache (periodics [i]);
2269 } 3140 }
2270 3141
2271 reheap (periodics, periodiccnt); 3142 reheap (periodics, periodiccnt);
2272} 3143}
2273#endif 3144#endif
2274 3145
2275/* adjust all timers by a given offset */ 3146/* adjust all timers by a given offset */
2276static void noinline 3147static void noinline ecb_cold
2277timers_reschedule (EV_P_ ev_tstamp adjust) 3148timers_reschedule (EV_P_ ev_tstamp adjust)
2278{ 3149{
2279 int i; 3150 int i;
2280 3151
2281 for (i = 0; i < timercnt; ++i) 3152 for (i = 0; i < timercnt; ++i)
… …
2318 * doesn't hurt either as we only do this on time-jumps or 3189 * doesn't hurt either as we only do this on time-jumps or
2319 * in the unlikely event of having been preempted here. 3190 * in the unlikely event of having been preempted here.
2320 */ 3191 */
2321 for (i = 4; --i; ) 3192 for (i = 4; --i; )
2322 { 3193 {
3194 ev_tstamp diff;
2323 rtmn_diff = ev_rt_now - mn_now; 3195 rtmn_diff = ev_rt_now - mn_now;
2324 3196
3197 diff = odiff - rtmn_diff;
3198
2325 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3199 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2326 return; /* all is well */ 3200 return; /* all is well */
2327 3201
2328 ev_rt_now = ev_time (); 3202 ev_rt_now = ev_time ();
2329 mn_now = get_clock (); 3203 mn_now = get_clock ();
2330 now_floor = mn_now; 3204 now_floor = mn_now;
… …
2352 3226
2353 mn_now = ev_rt_now; 3227 mn_now = ev_rt_now;
2354 } 3228 }
2355} 3229}
2356 3230
2357void 3231int
2358ev_run (EV_P_ int flags) 3232ev_run (EV_P_ int flags)
2359{ 3233{
2360#if EV_FEATURE_API 3234#if EV_FEATURE_API
2361 ++loop_depth; 3235 ++loop_depth;
2362#endif 3236#endif
… …
2420 ev_tstamp prev_mn_now = mn_now; 3294 ev_tstamp prev_mn_now = mn_now;
2421 3295
2422 /* update time to cancel out callback processing overhead */ 3296 /* update time to cancel out callback processing overhead */
2423 time_update (EV_A_ 1e100); 3297 time_update (EV_A_ 1e100);
2424 3298
3299 /* from now on, we want a pipe-wake-up */
3300 pipe_write_wanted = 1;
3301
3302 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3303
2425 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3304 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2426 { 3305 {
2427 waittime = MAX_BLOCKTIME; 3306 waittime = MAX_BLOCKTIME;
2428 3307
2429 if (timercnt) 3308 if (timercnt)
2430 { 3309 {
2431 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3310 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2432 if (waittime > to) waittime = to; 3311 if (waittime > to) waittime = to;
2433 } 3312 }
2434 3313
2435#if EV_PERIODIC_ENABLE 3314#if EV_PERIODIC_ENABLE
2436 if (periodiccnt) 3315 if (periodiccnt)
2437 { 3316 {
2438 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3317 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2439 if (waittime > to) waittime = to; 3318 if (waittime > to) waittime = to;
2440 } 3319 }
2441#endif 3320#endif
2442 3321
2443 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3322 /* don't let timeouts decrease the waittime below timeout_blocktime */
2444 if (expect_false (waittime < timeout_blocktime)) 3323 if (expect_false (waittime < timeout_blocktime))
2445 waittime = timeout_blocktime; 3324 waittime = timeout_blocktime;
3325
3326 /* at this point, we NEED to wait, so we have to ensure */
3327 /* to pass a minimum nonzero value to the backend */
3328 if (expect_false (waittime < backend_mintime))
3329 waittime = backend_mintime;
2446 3330
2447 /* extra check because io_blocktime is commonly 0 */ 3331 /* extra check because io_blocktime is commonly 0 */
2448 if (expect_false (io_blocktime)) 3332 if (expect_false (io_blocktime))
2449 { 3333 {
2450 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3334 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2451 3335
2452 if (sleeptime > waittime - backend_fudge) 3336 if (sleeptime > waittime - backend_mintime)
2453 sleeptime = waittime - backend_fudge; 3337 sleeptime = waittime - backend_mintime;
2454 3338
2455 if (expect_true (sleeptime > 0.)) 3339 if (expect_true (sleeptime > 0.))
2456 { 3340 {
2457 ev_sleep (sleeptime); 3341 ev_sleep (sleeptime);
2458 waittime -= sleeptime; 3342 waittime -= sleeptime;
… …
2465#endif 3349#endif
2466 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3350 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2467 backend_poll (EV_A_ waittime); 3351 backend_poll (EV_A_ waittime);
2468 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3352 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2469 3353
3354 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3355
3356 ECB_MEMORY_FENCE_ACQUIRE;
3357 if (pipe_write_skipped)
3358 {
3359 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3360 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3361 }
3362
3363
2470 /* update ev_rt_now, do magic */ 3364 /* update ev_rt_now, do magic */
2471 time_update (EV_A_ waittime + sleeptime); 3365 time_update (EV_A_ waittime + sleeptime);
2472 } 3366 }
2473 3367
2474 /* queue pending timers and reschedule them */ 3368 /* queue pending timers and reschedule them */
… …
2500 loop_done = EVBREAK_CANCEL; 3394 loop_done = EVBREAK_CANCEL;
2501 3395
2502#if EV_FEATURE_API 3396#if EV_FEATURE_API
2503 --loop_depth; 3397 --loop_depth;
2504#endif 3398#endif
3399
3400 return activecnt;
2505} 3401}
2506 3402
2507void 3403void
2508ev_break (EV_P_ int how) 3404ev_break (EV_P_ int how) EV_THROW
2509{ 3405{
2510 loop_done = how; 3406 loop_done = how;
2511} 3407}
2512 3408
2513void 3409void
2514ev_ref (EV_P) 3410ev_ref (EV_P) EV_THROW
2515{ 3411{
2516 ++activecnt; 3412 ++activecnt;
2517} 3413}
2518 3414
2519void 3415void
2520ev_unref (EV_P) 3416ev_unref (EV_P) EV_THROW
2521{ 3417{
2522 --activecnt; 3418 --activecnt;
2523} 3419}
2524 3420
2525void 3421void
2526ev_now_update (EV_P) 3422ev_now_update (EV_P) EV_THROW
2527{ 3423{
2528 time_update (EV_A_ 1e100); 3424 time_update (EV_A_ 1e100);
2529} 3425}
2530 3426
2531void 3427void
2532ev_suspend (EV_P) 3428ev_suspend (EV_P) EV_THROW
2533{ 3429{
2534 ev_now_update (EV_A); 3430 ev_now_update (EV_A);
2535} 3431}
2536 3432
2537void 3433void
2538ev_resume (EV_P) 3434ev_resume (EV_P) EV_THROW
2539{ 3435{
2540 ev_tstamp mn_prev = mn_now; 3436 ev_tstamp mn_prev = mn_now;
2541 3437
2542 ev_now_update (EV_A); 3438 ev_now_update (EV_A);
2543 timers_reschedule (EV_A_ mn_now - mn_prev); 3439 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2582 w->pending = 0; 3478 w->pending = 0;
2583 } 3479 }
2584} 3480}
2585 3481
2586int 3482int
2587ev_clear_pending (EV_P_ void *w) 3483ev_clear_pending (EV_P_ void *w) EV_THROW
2588{ 3484{
2589 W w_ = (W)w; 3485 W w_ = (W)w;
2590 int pending = w_->pending; 3486 int pending = w_->pending;
2591 3487
2592 if (expect_true (pending)) 3488 if (expect_true (pending))
… …
2625} 3521}
2626 3522
2627/*****************************************************************************/ 3523/*****************************************************************************/
2628 3524
2629void noinline 3525void noinline
2630ev_io_start (EV_P_ ev_io *w) 3526ev_io_start (EV_P_ ev_io *w) EV_THROW
2631{ 3527{
2632 int fd = w->fd; 3528 int fd = w->fd;
2633 3529
2634 if (expect_false (ev_is_active (w))) 3530 if (expect_false (ev_is_active (w)))
2635 return; 3531 return;
… …
2641 3537
2642 ev_start (EV_A_ (W)w, 1); 3538 ev_start (EV_A_ (W)w, 1);
2643 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3539 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2644 wlist_add (&anfds[fd].head, (WL)w); 3540 wlist_add (&anfds[fd].head, (WL)w);
2645 3541
3542 /* common bug, apparently */
3543 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3544
2646 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3545 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2647 w->events &= ~EV__IOFDSET; 3546 w->events &= ~EV__IOFDSET;
2648 3547
2649 EV_FREQUENT_CHECK; 3548 EV_FREQUENT_CHECK;
2650} 3549}
2651 3550
2652void noinline 3551void noinline
2653ev_io_stop (EV_P_ ev_io *w) 3552ev_io_stop (EV_P_ ev_io *w) EV_THROW
2654{ 3553{
2655 clear_pending (EV_A_ (W)w); 3554 clear_pending (EV_A_ (W)w);
2656 if (expect_false (!ev_is_active (w))) 3555 if (expect_false (!ev_is_active (w)))
2657 return; 3556 return;
2658 3557
… …
2667 3566
2668 EV_FREQUENT_CHECK; 3567 EV_FREQUENT_CHECK;
2669} 3568}
2670 3569
2671void noinline 3570void noinline
2672ev_timer_start (EV_P_ ev_timer *w) 3571ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2673{ 3572{
2674 if (expect_false (ev_is_active (w))) 3573 if (expect_false (ev_is_active (w)))
2675 return; 3574 return;
2676 3575
2677 ev_at (w) += mn_now; 3576 ev_at (w) += mn_now;
… …
2691 3590
2692 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3591 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2693} 3592}
2694 3593
2695void noinline 3594void noinline
2696ev_timer_stop (EV_P_ ev_timer *w) 3595ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2697{ 3596{
2698 clear_pending (EV_A_ (W)w); 3597 clear_pending (EV_A_ (W)w);
2699 if (expect_false (!ev_is_active (w))) 3598 if (expect_false (!ev_is_active (w)))
2700 return; 3599 return;
2701 3600
… …
2721 3620
2722 EV_FREQUENT_CHECK; 3621 EV_FREQUENT_CHECK;
2723} 3622}
2724 3623
2725void noinline 3624void noinline
2726ev_timer_again (EV_P_ ev_timer *w) 3625ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2727{ 3626{
2728 EV_FREQUENT_CHECK; 3627 EV_FREQUENT_CHECK;
3628
3629 clear_pending (EV_A_ (W)w);
2729 3630
2730 if (ev_is_active (w)) 3631 if (ev_is_active (w))
2731 { 3632 {
2732 if (w->repeat) 3633 if (w->repeat)
2733 { 3634 {
… …
2746 3647
2747 EV_FREQUENT_CHECK; 3648 EV_FREQUENT_CHECK;
2748} 3649}
2749 3650
2750ev_tstamp 3651ev_tstamp
2751ev_timer_remaining (EV_P_ ev_timer *w) 3652ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2752{ 3653{
2753 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3654 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2754} 3655}
2755 3656
2756#if EV_PERIODIC_ENABLE 3657#if EV_PERIODIC_ENABLE
2757void noinline 3658void noinline
2758ev_periodic_start (EV_P_ ev_periodic *w) 3659ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2759{ 3660{
2760 if (expect_false (ev_is_active (w))) 3661 if (expect_false (ev_is_active (w)))
2761 return; 3662 return;
2762 3663
2763 if (w->reschedule_cb) 3664 if (w->reschedule_cb)
2764 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3665 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2765 else if (w->interval) 3666 else if (w->interval)
2766 { 3667 {
2767 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3668 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2768 /* this formula differs from the one in periodic_reify because we do not always round up */ 3669 periodic_recalc (EV_A_ w);
2769 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2770 } 3670 }
2771 else 3671 else
2772 ev_at (w) = w->offset; 3672 ev_at (w) = w->offset;
2773 3673
2774 EV_FREQUENT_CHECK; 3674 EV_FREQUENT_CHECK;
… …
2784 3684
2785 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3685 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2786} 3686}
2787 3687
2788void noinline 3688void noinline
2789ev_periodic_stop (EV_P_ ev_periodic *w) 3689ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2790{ 3690{
2791 clear_pending (EV_A_ (W)w); 3691 clear_pending (EV_A_ (W)w);
2792 if (expect_false (!ev_is_active (w))) 3692 if (expect_false (!ev_is_active (w)))
2793 return; 3693 return;
2794 3694
… …
2812 3712
2813 EV_FREQUENT_CHECK; 3713 EV_FREQUENT_CHECK;
2814} 3714}
2815 3715
2816void noinline 3716void noinline
2817ev_periodic_again (EV_P_ ev_periodic *w) 3717ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2818{ 3718{
2819 /* TODO: use adjustheap and recalculation */ 3719 /* TODO: use adjustheap and recalculation */
2820 ev_periodic_stop (EV_A_ w); 3720 ev_periodic_stop (EV_A_ w);
2821 ev_periodic_start (EV_A_ w); 3721 ev_periodic_start (EV_A_ w);
2822} 3722}
… …
2827#endif 3727#endif
2828 3728
2829#if EV_SIGNAL_ENABLE 3729#if EV_SIGNAL_ENABLE
2830 3730
2831void noinline 3731void noinline
2832ev_signal_start (EV_P_ ev_signal *w) 3732ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2833{ 3733{
2834 if (expect_false (ev_is_active (w))) 3734 if (expect_false (ev_is_active (w)))
2835 return; 3735 return;
2836 3736
2837 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3737 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2839#if EV_MULTIPLICITY 3739#if EV_MULTIPLICITY
2840 assert (("libev: a signal must not be attached to two different loops", 3740 assert (("libev: a signal must not be attached to two different loops",
2841 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3741 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2842 3742
2843 signals [w->signum - 1].loop = EV_A; 3743 signals [w->signum - 1].loop = EV_A;
3744 ECB_MEMORY_FENCE_RELEASE;
2844#endif 3745#endif
2845 3746
2846 EV_FREQUENT_CHECK; 3747 EV_FREQUENT_CHECK;
2847 3748
2848#if EV_USE_SIGNALFD 3749#if EV_USE_SIGNALFD
… …
2908 3809
2909 EV_FREQUENT_CHECK; 3810 EV_FREQUENT_CHECK;
2910} 3811}
2911 3812
2912void noinline 3813void noinline
2913ev_signal_stop (EV_P_ ev_signal *w) 3814ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2914{ 3815{
2915 clear_pending (EV_A_ (W)w); 3816 clear_pending (EV_A_ (W)w);
2916 if (expect_false (!ev_is_active (w))) 3817 if (expect_false (!ev_is_active (w)))
2917 return; 3818 return;
2918 3819
… …
2949#endif 3850#endif
2950 3851
2951#if EV_CHILD_ENABLE 3852#if EV_CHILD_ENABLE
2952 3853
2953void 3854void
2954ev_child_start (EV_P_ ev_child *w) 3855ev_child_start (EV_P_ ev_child *w) EV_THROW
2955{ 3856{
2956#if EV_MULTIPLICITY 3857#if EV_MULTIPLICITY
2957 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3858 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2958#endif 3859#endif
2959 if (expect_false (ev_is_active (w))) 3860 if (expect_false (ev_is_active (w)))
… …
2966 3867
2967 EV_FREQUENT_CHECK; 3868 EV_FREQUENT_CHECK;
2968} 3869}
2969 3870
2970void 3871void
2971ev_child_stop (EV_P_ ev_child *w) 3872ev_child_stop (EV_P_ ev_child *w) EV_THROW
2972{ 3873{
2973 clear_pending (EV_A_ (W)w); 3874 clear_pending (EV_A_ (W)w);
2974 if (expect_false (!ev_is_active (w))) 3875 if (expect_false (!ev_is_active (w)))
2975 return; 3876 return;
2976 3877
… …
3003# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3904# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3004 3905
3005static void noinline 3906static void noinline
3006infy_add (EV_P_ ev_stat *w) 3907infy_add (EV_P_ ev_stat *w)
3007{ 3908{
3008 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); 3909 w->wd = inotify_add_watch (fs_fd, w->path,
3910 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3911 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3912 | IN_DONT_FOLLOW | IN_MASK_ADD);
3009 3913
3010 if (w->wd >= 0) 3914 if (w->wd >= 0)
3011 { 3915 {
3012 struct statfs sfs; 3916 struct statfs sfs;
3013 3917
… …
3017 3921
3018 if (!fs_2625) 3922 if (!fs_2625)
3019 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3923 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3020 else if (!statfs (w->path, &sfs) 3924 else if (!statfs (w->path, &sfs)
3021 && (sfs.f_type == 0x1373 /* devfs */ 3925 && (sfs.f_type == 0x1373 /* devfs */
3926 || sfs.f_type == 0x4006 /* fat */
3927 || sfs.f_type == 0x4d44 /* msdos */
3022 || sfs.f_type == 0xEF53 /* ext2/3 */ 3928 || sfs.f_type == 0xEF53 /* ext2/3 */
3929 || sfs.f_type == 0x72b6 /* jffs2 */
3930 || sfs.f_type == 0x858458f6 /* ramfs */
3931 || sfs.f_type == 0x5346544e /* ntfs */
3023 || sfs.f_type == 0x3153464a /* jfs */ 3932 || sfs.f_type == 0x3153464a /* jfs */
3933 || sfs.f_type == 0x9123683e /* btrfs */
3024 || sfs.f_type == 0x52654973 /* reiser3 */ 3934 || sfs.f_type == 0x52654973 /* reiser3 */
3025 || sfs.f_type == 0x01021994 /* tempfs */ 3935 || sfs.f_type == 0x01021994 /* tmpfs */
3026 || sfs.f_type == 0x58465342 /* xfs */)) 3936 || sfs.f_type == 0x58465342 /* xfs */))
3027 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3937 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3028 else 3938 else
3029 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3939 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3030 } 3940 }
… …
3051 if (!pend || pend == path) 3961 if (!pend || pend == path)
3052 break; 3962 break;
3053 3963
3054 *pend = 0; 3964 *pend = 0;
3055 w->wd = inotify_add_watch (fs_fd, path, mask); 3965 w->wd = inotify_add_watch (fs_fd, path, mask);
3056 } 3966 }
3057 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3967 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3058 } 3968 }
3059 } 3969 }
3060 3970
3061 if (w->wd >= 0) 3971 if (w->wd >= 0)
… …
3128 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4038 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3129 ofs += sizeof (struct inotify_event) + ev->len; 4039 ofs += sizeof (struct inotify_event) + ev->len;
3130 } 4040 }
3131} 4041}
3132 4042
3133inline_size void 4043inline_size void ecb_cold
3134ev_check_2625 (EV_P) 4044ev_check_2625 (EV_P)
3135{ 4045{
3136 /* kernels < 2.6.25 are borked 4046 /* kernels < 2.6.25 are borked
3137 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4047 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3138 */ 4048 */
… …
3143} 4053}
3144 4054
3145inline_size int 4055inline_size int
3146infy_newfd (void) 4056infy_newfd (void)
3147{ 4057{
3148#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4058#if defined IN_CLOEXEC && defined IN_NONBLOCK
3149 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4059 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3150 if (fd >= 0) 4060 if (fd >= 0)
3151 return fd; 4061 return fd;
3152#endif 4062#endif
3153 return inotify_init (); 4063 return inotify_init ();
… …
3228#else 4138#else
3229# define EV_LSTAT(p,b) lstat (p, b) 4139# define EV_LSTAT(p,b) lstat (p, b)
3230#endif 4140#endif
3231 4141
3232void 4142void
3233ev_stat_stat (EV_P_ ev_stat *w) 4143ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3234{ 4144{
3235 if (lstat (w->path, &w->attr) < 0) 4145 if (lstat (w->path, &w->attr) < 0)
3236 w->attr.st_nlink = 0; 4146 w->attr.st_nlink = 0;
3237 else if (!w->attr.st_nlink) 4147 else if (!w->attr.st_nlink)
3238 w->attr.st_nlink = 1; 4148 w->attr.st_nlink = 1;
… …
3277 ev_feed_event (EV_A_ w, EV_STAT); 4187 ev_feed_event (EV_A_ w, EV_STAT);
3278 } 4188 }
3279} 4189}
3280 4190
3281void 4191void
3282ev_stat_start (EV_P_ ev_stat *w) 4192ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3283{ 4193{
3284 if (expect_false (ev_is_active (w))) 4194 if (expect_false (ev_is_active (w)))
3285 return; 4195 return;
3286 4196
3287 ev_stat_stat (EV_A_ w); 4197 ev_stat_stat (EV_A_ w);
… …
3308 4218
3309 EV_FREQUENT_CHECK; 4219 EV_FREQUENT_CHECK;
3310} 4220}
3311 4221
3312void 4222void
3313ev_stat_stop (EV_P_ ev_stat *w) 4223ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3314{ 4224{
3315 clear_pending (EV_A_ (W)w); 4225 clear_pending (EV_A_ (W)w);
3316 if (expect_false (!ev_is_active (w))) 4226 if (expect_false (!ev_is_active (w)))
3317 return; 4227 return;
3318 4228
… …
3334} 4244}
3335#endif 4245#endif
3336 4246
3337#if EV_IDLE_ENABLE 4247#if EV_IDLE_ENABLE
3338void 4248void
3339ev_idle_start (EV_P_ ev_idle *w) 4249ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3340{ 4250{
3341 if (expect_false (ev_is_active (w))) 4251 if (expect_false (ev_is_active (w)))
3342 return; 4252 return;
3343 4253
3344 pri_adjust (EV_A_ (W)w); 4254 pri_adjust (EV_A_ (W)w);
… …
3357 4267
3358 EV_FREQUENT_CHECK; 4268 EV_FREQUENT_CHECK;
3359} 4269}
3360 4270
3361void 4271void
3362ev_idle_stop (EV_P_ ev_idle *w) 4272ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3363{ 4273{
3364 clear_pending (EV_A_ (W)w); 4274 clear_pending (EV_A_ (W)w);
3365 if (expect_false (!ev_is_active (w))) 4275 if (expect_false (!ev_is_active (w)))
3366 return; 4276 return;
3367 4277
… …
3381} 4291}
3382#endif 4292#endif
3383 4293
3384#if EV_PREPARE_ENABLE 4294#if EV_PREPARE_ENABLE
3385void 4295void
3386ev_prepare_start (EV_P_ ev_prepare *w) 4296ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3387{ 4297{
3388 if (expect_false (ev_is_active (w))) 4298 if (expect_false (ev_is_active (w)))
3389 return; 4299 return;
3390 4300
3391 EV_FREQUENT_CHECK; 4301 EV_FREQUENT_CHECK;
… …
3396 4306
3397 EV_FREQUENT_CHECK; 4307 EV_FREQUENT_CHECK;
3398} 4308}
3399 4309
3400void 4310void
3401ev_prepare_stop (EV_P_ ev_prepare *w) 4311ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3402{ 4312{
3403 clear_pending (EV_A_ (W)w); 4313 clear_pending (EV_A_ (W)w);
3404 if (expect_false (!ev_is_active (w))) 4314 if (expect_false (!ev_is_active (w)))
3405 return; 4315 return;
3406 4316
… …
3419} 4329}
3420#endif 4330#endif
3421 4331
3422#if EV_CHECK_ENABLE 4332#if EV_CHECK_ENABLE
3423void 4333void
3424ev_check_start (EV_P_ ev_check *w) 4334ev_check_start (EV_P_ ev_check *w) EV_THROW
3425{ 4335{
3426 if (expect_false (ev_is_active (w))) 4336 if (expect_false (ev_is_active (w)))
3427 return; 4337 return;
3428 4338
3429 EV_FREQUENT_CHECK; 4339 EV_FREQUENT_CHECK;
… …
3434 4344
3435 EV_FREQUENT_CHECK; 4345 EV_FREQUENT_CHECK;
3436} 4346}
3437 4347
3438void 4348void
3439ev_check_stop (EV_P_ ev_check *w) 4349ev_check_stop (EV_P_ ev_check *w) EV_THROW
3440{ 4350{
3441 clear_pending (EV_A_ (W)w); 4351 clear_pending (EV_A_ (W)w);
3442 if (expect_false (!ev_is_active (w))) 4352 if (expect_false (!ev_is_active (w)))
3443 return; 4353 return;
3444 4354
… …
3457} 4367}
3458#endif 4368#endif
3459 4369
3460#if EV_EMBED_ENABLE 4370#if EV_EMBED_ENABLE
3461void noinline 4371void noinline
3462ev_embed_sweep (EV_P_ ev_embed *w) 4372ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3463{ 4373{
3464 ev_run (w->other, EVRUN_NOWAIT); 4374 ev_run (w->other, EVRUN_NOWAIT);
3465} 4375}
3466 4376
3467static void 4377static void
… …
3515 ev_idle_stop (EV_A_ idle); 4425 ev_idle_stop (EV_A_ idle);
3516} 4426}
3517#endif 4427#endif
3518 4428
3519void 4429void
3520ev_embed_start (EV_P_ ev_embed *w) 4430ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3521{ 4431{
3522 if (expect_false (ev_is_active (w))) 4432 if (expect_false (ev_is_active (w)))
3523 return; 4433 return;
3524 4434
3525 { 4435 {
… …
3546 4456
3547 EV_FREQUENT_CHECK; 4457 EV_FREQUENT_CHECK;
3548} 4458}
3549 4459
3550void 4460void
3551ev_embed_stop (EV_P_ ev_embed *w) 4461ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3552{ 4462{
3553 clear_pending (EV_A_ (W)w); 4463 clear_pending (EV_A_ (W)w);
3554 if (expect_false (!ev_is_active (w))) 4464 if (expect_false (!ev_is_active (w)))
3555 return; 4465 return;
3556 4466
… …
3566} 4476}
3567#endif 4477#endif
3568 4478
3569#if EV_FORK_ENABLE 4479#if EV_FORK_ENABLE
3570void 4480void
3571ev_fork_start (EV_P_ ev_fork *w) 4481ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3572{ 4482{
3573 if (expect_false (ev_is_active (w))) 4483 if (expect_false (ev_is_active (w)))
3574 return; 4484 return;
3575 4485
3576 EV_FREQUENT_CHECK; 4486 EV_FREQUENT_CHECK;
… …
3581 4491
3582 EV_FREQUENT_CHECK; 4492 EV_FREQUENT_CHECK;
3583} 4493}
3584 4494
3585void 4495void
3586ev_fork_stop (EV_P_ ev_fork *w) 4496ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3587{ 4497{
3588 clear_pending (EV_A_ (W)w); 4498 clear_pending (EV_A_ (W)w);
3589 if (expect_false (!ev_is_active (w))) 4499 if (expect_false (!ev_is_active (w)))
3590 return; 4500 return;
3591 4501
… …
3604} 4514}
3605#endif 4515#endif
3606 4516
3607#if EV_CLEANUP_ENABLE 4517#if EV_CLEANUP_ENABLE
3608void 4518void
3609ev_cleanup_start (EV_P_ ev_cleanup *w) 4519ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3610{ 4520{
3611 if (expect_false (ev_is_active (w))) 4521 if (expect_false (ev_is_active (w)))
3612 return; 4522 return;
3613 4523
3614 EV_FREQUENT_CHECK; 4524 EV_FREQUENT_CHECK;
… …
3621 ev_unref (EV_A); 4531 ev_unref (EV_A);
3622 EV_FREQUENT_CHECK; 4532 EV_FREQUENT_CHECK;
3623} 4533}
3624 4534
3625void 4535void
3626ev_cleanup_stop (EV_P_ ev_cleanup *w) 4536ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3627{ 4537{
3628 clear_pending (EV_A_ (W)w); 4538 clear_pending (EV_A_ (W)w);
3629 if (expect_false (!ev_is_active (w))) 4539 if (expect_false (!ev_is_active (w)))
3630 return; 4540 return;
3631 4541
… …
3645} 4555}
3646#endif 4556#endif
3647 4557
3648#if EV_ASYNC_ENABLE 4558#if EV_ASYNC_ENABLE
3649void 4559void
3650ev_async_start (EV_P_ ev_async *w) 4560ev_async_start (EV_P_ ev_async *w) EV_THROW
3651{ 4561{
3652 if (expect_false (ev_is_active (w))) 4562 if (expect_false (ev_is_active (w)))
3653 return; 4563 return;
3654 4564
3655 w->sent = 0; 4565 w->sent = 0;
… …
3664 4574
3665 EV_FREQUENT_CHECK; 4575 EV_FREQUENT_CHECK;
3666} 4576}
3667 4577
3668void 4578void
3669ev_async_stop (EV_P_ ev_async *w) 4579ev_async_stop (EV_P_ ev_async *w) EV_THROW
3670{ 4580{
3671 clear_pending (EV_A_ (W)w); 4581 clear_pending (EV_A_ (W)w);
3672 if (expect_false (!ev_is_active (w))) 4582 if (expect_false (!ev_is_active (w)))
3673 return; 4583 return;
3674 4584
… …
3685 4595
3686 EV_FREQUENT_CHECK; 4596 EV_FREQUENT_CHECK;
3687} 4597}
3688 4598
3689void 4599void
3690ev_async_send (EV_P_ ev_async *w) 4600ev_async_send (EV_P_ ev_async *w) EV_THROW
3691{ 4601{
3692 w->sent = 1; 4602 w->sent = 1;
3693 evpipe_write (EV_A_ &async_pending); 4603 evpipe_write (EV_A_ &async_pending);
3694} 4604}
3695#endif 4605#endif
… …
3732 4642
3733 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4643 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3734} 4644}
3735 4645
3736void 4646void
3737ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4647ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3738{ 4648{
3739 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4649 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3740 4650
3741 if (expect_false (!once)) 4651 if (expect_false (!once))
3742 { 4652 {
… …
3763} 4673}
3764 4674
3765/*****************************************************************************/ 4675/*****************************************************************************/
3766 4676
3767#if EV_WALK_ENABLE 4677#if EV_WALK_ENABLE
3768void 4678void ecb_cold
3769ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4679ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3770{ 4680{
3771 int i, j; 4681 int i, j;
3772 ev_watcher_list *wl, *wn; 4682 ev_watcher_list *wl, *wn;
3773 4683
3774 if (types & (EV_IO | EV_EMBED)) 4684 if (types & (EV_IO | EV_EMBED))
… …
3817 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4727 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3818#endif 4728#endif
3819 4729
3820#if EV_IDLE_ENABLE 4730#if EV_IDLE_ENABLE
3821 if (types & EV_IDLE) 4731 if (types & EV_IDLE)
3822 for (j = NUMPRI; i--; ) 4732 for (j = NUMPRI; j--; )
3823 for (i = idlecnt [j]; i--; ) 4733 for (i = idlecnt [j]; i--; )
3824 cb (EV_A_ EV_IDLE, idles [j][i]); 4734 cb (EV_A_ EV_IDLE, idles [j][i]);
3825#endif 4735#endif
3826 4736
3827#if EV_FORK_ENABLE 4737#if EV_FORK_ENABLE
… …
3880 4790
3881#if EV_MULTIPLICITY 4791#if EV_MULTIPLICITY
3882 #include "ev_wrap.h" 4792 #include "ev_wrap.h"
3883#endif 4793#endif
3884 4794
3885EV_CPP(})
3886

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