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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 1.456 by root, Thu Jul 4 22:32:23 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 0x00010003
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/* work around x32 idiocy by defining proper macros */
555#if __x86_64 || _M_AMD64
556 #if __ILP32
557 #define ECB_AMD64_X32 1
558 #else
559 #define ECB_AMD64 1
471#endif 560 #endif
561#endif
472 562
563/* many compilers define _GNUC_ to some versions but then only implement
564 * what their idiot authors think are the "more important" extensions,
565 * causing enormous grief in return for some better fake benchmark numbers.
566 * or so.
567 * we try to detect these and simply assume they are not gcc - if they have
568 * an issue with that they should have done it right in the first place.
569 */
570#ifndef ECB_GCC_VERSION
571 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
572 #define ECB_GCC_VERSION(major,minor) 0
573 #else
574 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
575 #endif
576#endif
577
578#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
579#define ECB_C99 (__STDC_VERSION__ >= 199901L)
580#define ECB_C11 (__STDC_VERSION__ >= 201112L)
581#define ECB_CPP (__cplusplus+0)
582#define ECB_CPP11 (__cplusplus >= 201103L)
583
584#if ECB_CPP
585 #define ECB_EXTERN_C extern "C"
586 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
587 #define ECB_EXTERN_C_END }
588#else
589 #define ECB_EXTERN_C extern
590 #define ECB_EXTERN_C_BEG
591 #define ECB_EXTERN_C_END
592#endif
593
594/*****************************************************************************/
595
596/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
597/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
598
599#if ECB_NO_THREADS
600 #define ECB_NO_SMP 1
601#endif
602
603#if ECB_NO_SMP
604 #define ECB_MEMORY_FENCE do { } while (0)
605#endif
606
607#ifndef ECB_MEMORY_FENCE
608 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
609 #if __i386 || __i386__
610 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
611 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
612 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
613 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
614 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
615 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
616 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
617 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
618 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
619 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
620 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
622 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
623 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
624 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
625 #elif __sparc || __sparc__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
629 #elif defined __s390__ || defined __s390x__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
631 #elif defined __mips__
632 /* GNU/Linux emulates sync on mips1 architectures, so we force it's use */
633 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
635 #elif defined __alpha__
636 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
637 #elif defined __hppa__
638 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
639 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
640 #elif defined __ia64__
641 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
642 #endif
643 #endif
644#endif
645
646#ifndef ECB_MEMORY_FENCE
647 #if ECB_GCC_VERSION(4,7)
648 /* see comment below (stdatomic.h) about the C11 memory model. */
649 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
650
651 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
652 * without risking compile time errors with other compilers. We *could*
653 * define our own ecb_clang_has_feature, but I just can't be bothered to work
654 * around this shit time and again.
655 * #elif defined __clang && __has_feature (cxx_atomic)
656 * // see comment below (stdatomic.h) about the C11 memory model.
657 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
658 */
659
660 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
661 #define ECB_MEMORY_FENCE __sync_synchronize ()
662 #elif _MSC_VER >= 1400 /* VC++ 2005 */
663 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
664 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
665 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
666 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
667 #elif defined _WIN32
668 #include <WinNT.h>
669 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
670 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
671 #include <mbarrier.h>
672 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
673 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
674 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
675 #elif __xlC__
676 #define ECB_MEMORY_FENCE __sync ()
677 #endif
678#endif
679
680#ifndef ECB_MEMORY_FENCE
681 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
682 /* we assume that these memory fences work on all variables/all memory accesses, */
683 /* not just C11 atomics and atomic accesses */
684 #include <stdatomic.h>
685 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
686 /* any fence other than seq_cst, which isn't very efficient for us. */
687 /* Why that is, we don't know - either the C11 memory model is quite useless */
688 /* for most usages, or gcc and clang have a bug */
689 /* I *currently* lean towards the latter, and inefficiently implement */
690 /* all three of ecb's fences as a seq_cst fence */
691 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
692 #endif
693#endif
694
695#ifndef ECB_MEMORY_FENCE
696 #if !ECB_AVOID_PTHREADS
697 /*
698 * if you get undefined symbol references to pthread_mutex_lock,
699 * or failure to find pthread.h, then you should implement
700 * the ECB_MEMORY_FENCE operations for your cpu/compiler
701 * OR provide pthread.h and link against the posix thread library
702 * of your system.
703 */
704 #include <pthread.h>
705 #define ECB_NEEDS_PTHREADS 1
706 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
707
708 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
709 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
710 #endif
711#endif
712
713#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
714 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
715#endif
716
717#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
718 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
719#endif
720
721/*****************************************************************************/
722
723#if __cplusplus
724 #define ecb_inline static inline
725#elif ECB_GCC_VERSION(2,5)
726 #define ecb_inline static __inline__
727#elif ECB_C99
728 #define ecb_inline static inline
729#else
730 #define ecb_inline static
731#endif
732
733#if ECB_GCC_VERSION(3,3)
734 #define ecb_restrict __restrict__
735#elif ECB_C99
736 #define ecb_restrict restrict
737#else
738 #define ecb_restrict
739#endif
740
741typedef int ecb_bool;
742
743#define ECB_CONCAT_(a, b) a ## b
744#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
745#define ECB_STRINGIFY_(a) # a
746#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
747
748#define ecb_function_ ecb_inline
749
750#if ECB_GCC_VERSION(3,1)
751 #define ecb_attribute(attrlist) __attribute__(attrlist)
752 #define ecb_is_constant(expr) __builtin_constant_p (expr)
753 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
754 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
755#else
756 #define ecb_attribute(attrlist)
757 #define ecb_is_constant(expr) 0
758 #define ecb_expect(expr,value) (expr)
759 #define ecb_prefetch(addr,rw,locality)
760#endif
761
762/* no emulation for ecb_decltype */
763#if ECB_GCC_VERSION(4,5)
764 #define ecb_decltype(x) __decltype(x)
765#elif ECB_GCC_VERSION(3,0)
766 #define ecb_decltype(x) __typeof(x)
767#endif
768
769#define ecb_noinline ecb_attribute ((__noinline__))
770#define ecb_unused ecb_attribute ((__unused__))
771#define ecb_const ecb_attribute ((__const__))
772#define ecb_pure ecb_attribute ((__pure__))
773
774#if ECB_C11
775 #define ecb_noreturn _Noreturn
776#else
777 #define ecb_noreturn ecb_attribute ((__noreturn__))
778#endif
779
780#if ECB_GCC_VERSION(4,3)
781 #define ecb_artificial ecb_attribute ((__artificial__))
782 #define ecb_hot ecb_attribute ((__hot__))
783 #define ecb_cold ecb_attribute ((__cold__))
784#else
785 #define ecb_artificial
786 #define ecb_hot
787 #define ecb_cold
788#endif
789
790/* put around conditional expressions if you are very sure that the */
791/* expression is mostly true or mostly false. note that these return */
792/* booleans, not the expression. */
473#define expect_false(expr) expect ((expr) != 0, 0) 793#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#define expect_true(expr) expect ((expr) != 0, 1) 794#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
795/* for compatibility to the rest of the world */
796#define ecb_likely(expr) ecb_expect_true (expr)
797#define ecb_unlikely(expr) ecb_expect_false (expr)
798
799/* count trailing zero bits and count # of one bits */
800#if ECB_GCC_VERSION(3,4)
801 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
802 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
803 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
804 #define ecb_ctz32(x) __builtin_ctz (x)
805 #define ecb_ctz64(x) __builtin_ctzll (x)
806 #define ecb_popcount32(x) __builtin_popcount (x)
807 /* no popcountll */
808#else
809 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
810 ecb_function_ int
811 ecb_ctz32 (uint32_t x)
812 {
813 int r = 0;
814
815 x &= ~x + 1; /* this isolates the lowest bit */
816
817#if ECB_branchless_on_i386
818 r += !!(x & 0xaaaaaaaa) << 0;
819 r += !!(x & 0xcccccccc) << 1;
820 r += !!(x & 0xf0f0f0f0) << 2;
821 r += !!(x & 0xff00ff00) << 3;
822 r += !!(x & 0xffff0000) << 4;
823#else
824 if (x & 0xaaaaaaaa) r += 1;
825 if (x & 0xcccccccc) r += 2;
826 if (x & 0xf0f0f0f0) r += 4;
827 if (x & 0xff00ff00) r += 8;
828 if (x & 0xffff0000) r += 16;
829#endif
830
831 return r;
832 }
833
834 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
835 ecb_function_ int
836 ecb_ctz64 (uint64_t x)
837 {
838 int shift = x & 0xffffffffU ? 0 : 32;
839 return ecb_ctz32 (x >> shift) + shift;
840 }
841
842 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
843 ecb_function_ int
844 ecb_popcount32 (uint32_t x)
845 {
846 x -= (x >> 1) & 0x55555555;
847 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
848 x = ((x >> 4) + x) & 0x0f0f0f0f;
849 x *= 0x01010101;
850
851 return x >> 24;
852 }
853
854 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
855 ecb_function_ int ecb_ld32 (uint32_t x)
856 {
857 int r = 0;
858
859 if (x >> 16) { x >>= 16; r += 16; }
860 if (x >> 8) { x >>= 8; r += 8; }
861 if (x >> 4) { x >>= 4; r += 4; }
862 if (x >> 2) { x >>= 2; r += 2; }
863 if (x >> 1) { r += 1; }
864
865 return r;
866 }
867
868 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
869 ecb_function_ int ecb_ld64 (uint64_t x)
870 {
871 int r = 0;
872
873 if (x >> 32) { x >>= 32; r += 32; }
874
875 return r + ecb_ld32 (x);
876 }
877#endif
878
879ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
880ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
881ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
882ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
883
884ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
885ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
886{
887 return ( (x * 0x0802U & 0x22110U)
888 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
889}
890
891ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
892ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
893{
894 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
895 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
896 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
897 x = ( x >> 8 ) | ( x << 8);
898
899 return x;
900}
901
902ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
903ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
904{
905 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
906 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
907 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
908 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
909 x = ( x >> 16 ) | ( x << 16);
910
911 return x;
912}
913
914/* popcount64 is only available on 64 bit cpus as gcc builtin */
915/* so for this version we are lazy */
916ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
917ecb_function_ int
918ecb_popcount64 (uint64_t x)
919{
920 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
921}
922
923ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
924ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
925ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
926ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
927ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
928ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
929ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
930ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
931
932ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
933ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
934ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
935ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
936ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
937ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
938ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
939ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
940
941#if ECB_GCC_VERSION(4,3)
942 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
943 #define ecb_bswap32(x) __builtin_bswap32 (x)
944 #define ecb_bswap64(x) __builtin_bswap64 (x)
945#else
946 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
947 ecb_function_ uint16_t
948 ecb_bswap16 (uint16_t x)
949 {
950 return ecb_rotl16 (x, 8);
951 }
952
953 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
954 ecb_function_ uint32_t
955 ecb_bswap32 (uint32_t x)
956 {
957 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
958 }
959
960 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
961 ecb_function_ uint64_t
962 ecb_bswap64 (uint64_t x)
963 {
964 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
965 }
966#endif
967
968#if ECB_GCC_VERSION(4,5)
969 #define ecb_unreachable() __builtin_unreachable ()
970#else
971 /* this seems to work fine, but gcc always emits a warning for it :/ */
972 ecb_inline void ecb_unreachable (void) ecb_noreturn;
973 ecb_inline void ecb_unreachable (void) { }
974#endif
975
976/* try to tell the compiler that some condition is definitely true */
977#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
978
979ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
980ecb_inline unsigned char
981ecb_byteorder_helper (void)
982{
983 /* the union code still generates code under pressure in gcc, */
984 /* but less than using pointers, and always seems to */
985 /* successfully return a constant. */
986 /* the reason why we have this horrible preprocessor mess */
987 /* is to avoid it in all cases, at least on common architectures */
988 /* or when using a recent enough gcc version (>= 4.6) */
989#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
990 return 0x44;
991#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
992 return 0x44;
993#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
994 return 0x11;
995#else
996 union
997 {
998 uint32_t i;
999 uint8_t c;
1000 } u = { 0x11223344 };
1001 return u.c;
1002#endif
1003}
1004
1005ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1006ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1007ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1008ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1009
1010#if ECB_GCC_VERSION(3,0) || ECB_C99
1011 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1012#else
1013 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1014#endif
1015
1016#if __cplusplus
1017 template<typename T>
1018 static inline T ecb_div_rd (T val, T div)
1019 {
1020 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1021 }
1022 template<typename T>
1023 static inline T ecb_div_ru (T val, T div)
1024 {
1025 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1026 }
1027#else
1028 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1029 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1030#endif
1031
1032#if ecb_cplusplus_does_not_suck
1033 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1034 template<typename T, int N>
1035 static inline int ecb_array_length (const T (&arr)[N])
1036 {
1037 return N;
1038 }
1039#else
1040 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1041#endif
1042
1043/*******************************************************************************/
1044/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1045
1046/* basically, everything uses "ieee pure-endian" floating point numbers */
1047/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1048#if 0 \
1049 || __i386 || __i386__ \
1050 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1051 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1052 || defined __arm__ && defined __ARM_EABI__ \
1053 || defined __s390__ || defined __s390x__ \
1054 || defined __mips__ \
1055 || defined __alpha__ \
1056 || defined __hppa__ \
1057 || defined __ia64__ \
1058 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1059 #define ECB_STDFP 1
1060 #include <string.h> /* for memcpy */
1061#else
1062 #define ECB_STDFP 0
1063 #include <math.h> /* for frexp*, ldexp* */
1064#endif
1065
1066#ifndef ECB_NO_LIBM
1067
1068 /* convert a float to ieee single/binary32 */
1069 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1070 ecb_function_ uint32_t
1071 ecb_float_to_binary32 (float x)
1072 {
1073 uint32_t r;
1074
1075 #if ECB_STDFP
1076 memcpy (&r, &x, 4);
1077 #else
1078 /* slow emulation, works for anything but -0 */
1079 uint32_t m;
1080 int e;
1081
1082 if (x == 0e0f ) return 0x00000000U;
1083 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1084 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1085 if (x != x ) return 0x7fbfffffU;
1086
1087 m = frexpf (x, &e) * 0x1000000U;
1088
1089 r = m & 0x80000000U;
1090
1091 if (r)
1092 m = -m;
1093
1094 if (e <= -126)
1095 {
1096 m &= 0xffffffU;
1097 m >>= (-125 - e);
1098 e = -126;
1099 }
1100
1101 r |= (e + 126) << 23;
1102 r |= m & 0x7fffffU;
1103 #endif
1104
1105 return r;
1106 }
1107
1108 /* converts an ieee single/binary32 to a float */
1109 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1110 ecb_function_ float
1111 ecb_binary32_to_float (uint32_t x)
1112 {
1113 float r;
1114
1115 #if ECB_STDFP
1116 memcpy (&r, &x, 4);
1117 #else
1118 /* emulation, only works for normals and subnormals and +0 */
1119 int neg = x >> 31;
1120 int e = (x >> 23) & 0xffU;
1121
1122 x &= 0x7fffffU;
1123
1124 if (e)
1125 x |= 0x800000U;
1126 else
1127 e = 1;
1128
1129 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1130 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1131
1132 r = neg ? -r : r;
1133 #endif
1134
1135 return r;
1136 }
1137
1138 /* convert a double to ieee double/binary64 */
1139 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1140 ecb_function_ uint64_t
1141 ecb_double_to_binary64 (double x)
1142 {
1143 uint64_t r;
1144
1145 #if ECB_STDFP
1146 memcpy (&r, &x, 8);
1147 #else
1148 /* slow emulation, works for anything but -0 */
1149 uint64_t m;
1150 int e;
1151
1152 if (x == 0e0 ) return 0x0000000000000000U;
1153 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1154 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1155 if (x != x ) return 0X7ff7ffffffffffffU;
1156
1157 m = frexp (x, &e) * 0x20000000000000U;
1158
1159 r = m & 0x8000000000000000;;
1160
1161 if (r)
1162 m = -m;
1163
1164 if (e <= -1022)
1165 {
1166 m &= 0x1fffffffffffffU;
1167 m >>= (-1021 - e);
1168 e = -1022;
1169 }
1170
1171 r |= ((uint64_t)(e + 1022)) << 52;
1172 r |= m & 0xfffffffffffffU;
1173 #endif
1174
1175 return r;
1176 }
1177
1178 /* converts an ieee double/binary64 to a double */
1179 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1180 ecb_function_ double
1181 ecb_binary64_to_double (uint64_t x)
1182 {
1183 double r;
1184
1185 #if ECB_STDFP
1186 memcpy (&r, &x, 8);
1187 #else
1188 /* emulation, only works for normals and subnormals and +0 */
1189 int neg = x >> 63;
1190 int e = (x >> 52) & 0x7ffU;
1191
1192 x &= 0xfffffffffffffU;
1193
1194 if (e)
1195 x |= 0x10000000000000U;
1196 else
1197 e = 1;
1198
1199 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1200 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1201
1202 r = neg ? -r : r;
1203 #endif
1204
1205 return r;
1206 }
1207
1208#endif
1209
1210#endif
1211
1212/* ECB.H END */
1213
1214#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1215/* if your architecture doesn't need memory fences, e.g. because it is
1216 * single-cpu/core, or if you use libev in a project that doesn't use libev
1217 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1218 * libev, in which cases the memory fences become nops.
1219 * alternatively, you can remove this #error and link against libpthread,
1220 * which will then provide the memory fences.
1221 */
1222# error "memory fences not defined for your architecture, please report"
1223#endif
1224
1225#ifndef ECB_MEMORY_FENCE
1226# define ECB_MEMORY_FENCE do { } while (0)
1227# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1228# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1229#endif
1230
1231#define expect_false(cond) ecb_expect_false (cond)
1232#define expect_true(cond) ecb_expect_true (cond)
1233#define noinline ecb_noinline
1234
475#define inline_size static inline 1235#define inline_size ecb_inline
476 1236
477#if EV_FEATURE_CODE 1237#if EV_FEATURE_CODE
478# define inline_speed static inline 1238# define inline_speed ecb_inline
479#else 1239#else
480# define inline_speed static noinline 1240# define inline_speed static noinline
481#endif 1241#endif
482 1242
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1243#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
522# include "ev_win32.c" 1282# include "ev_win32.c"
523#endif 1283#endif
524 1284
525/*****************************************************************************/ 1285/*****************************************************************************/
526 1286
1287/* define a suitable floor function (only used by periodics atm) */
1288
1289#if EV_USE_FLOOR
1290# include <math.h>
1291# define ev_floor(v) floor (v)
1292#else
1293
1294#include <float.h>
1295
1296/* a floor() replacement function, should be independent of ev_tstamp type */
1297static ev_tstamp noinline
1298ev_floor (ev_tstamp v)
1299{
1300 /* the choice of shift factor is not terribly important */
1301#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1302 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1303#else
1304 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1305#endif
1306
1307 /* argument too large for an unsigned long? */
1308 if (expect_false (v >= shift))
1309 {
1310 ev_tstamp f;
1311
1312 if (v == v - 1.)
1313 return v; /* very large number */
1314
1315 f = shift * ev_floor (v * (1. / shift));
1316 return f + ev_floor (v - f);
1317 }
1318
1319 /* special treatment for negative args? */
1320 if (expect_false (v < 0.))
1321 {
1322 ev_tstamp f = -ev_floor (-v);
1323
1324 return f - (f == v ? 0 : 1);
1325 }
1326
1327 /* fits into an unsigned long */
1328 return (unsigned long)v;
1329}
1330
1331#endif
1332
1333/*****************************************************************************/
1334
527#ifdef __linux 1335#ifdef __linux
528# include <sys/utsname.h> 1336# include <sys/utsname.h>
529#endif 1337#endif
530 1338
531static unsigned int noinline 1339static unsigned int noinline ecb_cold
532ev_linux_version (void) 1340ev_linux_version (void)
533{ 1341{
534#ifdef __linux 1342#ifdef __linux
535 unsigned int v = 0; 1343 unsigned int v = 0;
536 struct utsname buf; 1344 struct utsname buf;
… …
565} 1373}
566 1374
567/*****************************************************************************/ 1375/*****************************************************************************/
568 1376
569#if EV_AVOID_STDIO 1377#if EV_AVOID_STDIO
570static void noinline 1378static void noinline ecb_cold
571ev_printerr (const char *msg) 1379ev_printerr (const char *msg)
572{ 1380{
573 write (STDERR_FILENO, msg, strlen (msg)); 1381 write (STDERR_FILENO, msg, strlen (msg));
574} 1382}
575#endif 1383#endif
576 1384
577static void (*syserr_cb)(const char *msg); 1385static void (*syserr_cb)(const char *msg) EV_THROW;
578 1386
579void 1387void ecb_cold
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1388ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
581{ 1389{
582 syserr_cb = cb; 1390 syserr_cb = cb;
583} 1391}
584 1392
585static void noinline 1393static void noinline ecb_cold
586ev_syserr (const char *msg) 1394ev_syserr (const char *msg)
587{ 1395{
588 if (!msg) 1396 if (!msg)
589 msg = "(libev) system error"; 1397 msg = "(libev) system error";
590 1398
… …
603 abort (); 1411 abort ();
604 } 1412 }
605} 1413}
606 1414
607static void * 1415static void *
608ev_realloc_emul (void *ptr, long size) 1416ev_realloc_emul (void *ptr, long size) EV_THROW
609{ 1417{
610#if __GLIBC__
611 return realloc (ptr, size);
612#else
613 /* some systems, notably openbsd and darwin, fail to properly 1418 /* some systems, notably openbsd and darwin, fail to properly
614 * implement realloc (x, 0) (as required by both ansi c-89 and 1419 * implement realloc (x, 0) (as required by both ansi c-89 and
615 * the single unix specification, so work around them here. 1420 * the single unix specification, so work around them here.
1421 * recently, also (at least) fedora and debian started breaking it,
1422 * despite documenting it otherwise.
616 */ 1423 */
617 1424
618 if (size) 1425 if (size)
619 return realloc (ptr, size); 1426 return realloc (ptr, size);
620 1427
621 free (ptr); 1428 free (ptr);
622 return 0; 1429 return 0;
623#endif
624} 1430}
625 1431
626static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1432static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
627 1433
628void 1434void ecb_cold
629ev_set_allocator (void *(*cb)(void *ptr, long size)) 1435ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
630{ 1436{
631 alloc = cb; 1437 alloc = cb;
632} 1438}
633 1439
634inline_speed void * 1440inline_speed void *
… …
722 #undef VAR 1528 #undef VAR
723 }; 1529 };
724 #include "ev_wrap.h" 1530 #include "ev_wrap.h"
725 1531
726 static struct ev_loop default_loop_struct; 1532 static struct ev_loop default_loop_struct;
727 struct ev_loop *ev_default_loop_ptr; 1533 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
728 1534
729#else 1535#else
730 1536
731 ev_tstamp ev_rt_now; 1537 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; 1538 #define VAR(name,decl) static decl;
733 #include "ev_vars.h" 1539 #include "ev_vars.h"
734 #undef VAR 1540 #undef VAR
735 1541
736 static int ev_default_loop_ptr; 1542 static int ev_default_loop_ptr;
… …
751 1557
752/*****************************************************************************/ 1558/*****************************************************************************/
753 1559
754#ifndef EV_HAVE_EV_TIME 1560#ifndef EV_HAVE_EV_TIME
755ev_tstamp 1561ev_tstamp
756ev_time (void) 1562ev_time (void) EV_THROW
757{ 1563{
758#if EV_USE_REALTIME 1564#if EV_USE_REALTIME
759 if (expect_true (have_realtime)) 1565 if (expect_true (have_realtime))
760 { 1566 {
761 struct timespec ts; 1567 struct timespec ts;
… …
785 return ev_time (); 1591 return ev_time ();
786} 1592}
787 1593
788#if EV_MULTIPLICITY 1594#if EV_MULTIPLICITY
789ev_tstamp 1595ev_tstamp
790ev_now (EV_P) 1596ev_now (EV_P) EV_THROW
791{ 1597{
792 return ev_rt_now; 1598 return ev_rt_now;
793} 1599}
794#endif 1600#endif
795 1601
796void 1602void
797ev_sleep (ev_tstamp delay) 1603ev_sleep (ev_tstamp delay) EV_THROW
798{ 1604{
799 if (delay > 0.) 1605 if (delay > 0.)
800 { 1606 {
801#if EV_USE_NANOSLEEP 1607#if EV_USE_NANOSLEEP
802 struct timespec ts; 1608 struct timespec ts;
803 1609
804 EV_TS_SET (ts, delay); 1610 EV_TS_SET (ts, delay);
805 nanosleep (&ts, 0); 1611 nanosleep (&ts, 0);
806#elif defined(_WIN32) 1612#elif defined _WIN32
807 Sleep ((unsigned long)(delay * 1e3)); 1613 Sleep ((unsigned long)(delay * 1e3));
808#else 1614#else
809 struct timeval tv; 1615 struct timeval tv;
810 1616
811 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1617 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
815 select (0, 0, 0, 0, &tv); 1621 select (0, 0, 0, 0, &tv);
816#endif 1622#endif
817 } 1623 }
818} 1624}
819 1625
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/*****************************************************************************/ 1626/*****************************************************************************/
829 1627
830#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
831 1629
832/* find a suitable new size for the given array, */ 1630/* find a suitable new size for the given array, */
… …
838 1636
839 do 1637 do
840 ncur <<= 1; 1638 ncur <<= 1;
841 while (cnt > ncur); 1639 while (cnt > ncur);
842 1640
843 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1641 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
844 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1642 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
845 { 1643 {
846 ncur *= elem; 1644 ncur *= elem;
847 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1645 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
848 ncur = ncur - sizeof (void *) * 4; 1646 ncur = ncur - sizeof (void *) * 4;
… …
850 } 1648 }
851 1649
852 return ncur; 1650 return ncur;
853} 1651}
854 1652
855static noinline void * 1653static void * noinline ecb_cold
856array_realloc (int elem, void *base, int *cur, int cnt) 1654array_realloc (int elem, void *base, int *cur, int cnt)
857{ 1655{
858 *cur = array_nextsize (elem, *cur, cnt); 1656 *cur = array_nextsize (elem, *cur, cnt);
859 return ev_realloc (base, elem * *cur); 1657 return ev_realloc (base, elem * *cur);
860} 1658}
… …
863 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1661 memset ((void *)(base), 0, sizeof (*(base)) * (count))
864 1662
865#define array_needsize(type,base,cur,cnt,init) \ 1663#define array_needsize(type,base,cur,cnt,init) \
866 if (expect_false ((cnt) > (cur))) \ 1664 if (expect_false ((cnt) > (cur))) \
867 { \ 1665 { \
868 int ocur_ = (cur); \ 1666 int ecb_unused ocur_ = (cur); \
869 (base) = (type *)array_realloc \ 1667 (base) = (type *)array_realloc \
870 (sizeof (type), (base), &(cur), (cnt)); \ 1668 (sizeof (type), (base), &(cur), (cnt)); \
871 init ((base) + (ocur_), (cur) - ocur_); \ 1669 init ((base) + (ocur_), (cur) - ocur_); \
872 } 1670 }
873 1671
… …
891pendingcb (EV_P_ ev_prepare *w, int revents) 1689pendingcb (EV_P_ ev_prepare *w, int revents)
892{ 1690{
893} 1691}
894 1692
895void noinline 1693void noinline
896ev_feed_event (EV_P_ void *w, int revents) 1694ev_feed_event (EV_P_ void *w, int revents) EV_THROW
897{ 1695{
898 W w_ = (W)w; 1696 W w_ = (W)w;
899 int pri = ABSPRI (w_); 1697 int pri = ABSPRI (w_);
900 1698
901 if (expect_false (w_->pending)) 1699 if (expect_false (w_->pending))
… …
905 w_->pending = ++pendingcnt [pri]; 1703 w_->pending = ++pendingcnt [pri];
906 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1704 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
907 pendings [pri][w_->pending - 1].w = w_; 1705 pendings [pri][w_->pending - 1].w = w_;
908 pendings [pri][w_->pending - 1].events = revents; 1706 pendings [pri][w_->pending - 1].events = revents;
909 } 1707 }
1708
1709 pendingpri = NUMPRI - 1;
910} 1710}
911 1711
912inline_speed void 1712inline_speed void
913feed_reverse (EV_P_ W w) 1713feed_reverse (EV_P_ W w)
914{ 1714{
… …
960 if (expect_true (!anfd->reify)) 1760 if (expect_true (!anfd->reify))
961 fd_event_nocheck (EV_A_ fd, revents); 1761 fd_event_nocheck (EV_A_ fd, revents);
962} 1762}
963 1763
964void 1764void
965ev_feed_fd_event (EV_P_ int fd, int revents) 1765ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
966{ 1766{
967 if (fd >= 0 && fd < anfdmax) 1767 if (fd >= 0 && fd < anfdmax)
968 fd_event_nocheck (EV_A_ fd, revents); 1768 fd_event_nocheck (EV_A_ fd, revents);
969} 1769}
970 1770
… …
973inline_size void 1773inline_size void
974fd_reify (EV_P) 1774fd_reify (EV_P)
975{ 1775{
976 int i; 1776 int i;
977 1777
1778#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1779 for (i = 0; i < fdchangecnt; ++i)
1780 {
1781 int fd = fdchanges [i];
1782 ANFD *anfd = anfds + fd;
1783
1784 if (anfd->reify & EV__IOFDSET && anfd->head)
1785 {
1786 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1787
1788 if (handle != anfd->handle)
1789 {
1790 unsigned long arg;
1791
1792 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1793
1794 /* handle changed, but fd didn't - we need to do it in two steps */
1795 backend_modify (EV_A_ fd, anfd->events, 0);
1796 anfd->events = 0;
1797 anfd->handle = handle;
1798 }
1799 }
1800 }
1801#endif
1802
978 for (i = 0; i < fdchangecnt; ++i) 1803 for (i = 0; i < fdchangecnt; ++i)
979 { 1804 {
980 int fd = fdchanges [i]; 1805 int fd = fdchanges [i];
981 ANFD *anfd = anfds + fd; 1806 ANFD *anfd = anfds + fd;
982 ev_io *w; 1807 ev_io *w;
… …
984 unsigned char o_events = anfd->events; 1809 unsigned char o_events = anfd->events;
985 unsigned char o_reify = anfd->reify; 1810 unsigned char o_reify = anfd->reify;
986 1811
987 anfd->reify = 0; 1812 anfd->reify = 0;
988 1813
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 */ 1814 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1000 { 1815 {
1001 anfd->events = 0; 1816 anfd->events = 0;
1002 1817
1003 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1818 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1028 fdchanges [fdchangecnt - 1] = fd; 1843 fdchanges [fdchangecnt - 1] = fd;
1029 } 1844 }
1030} 1845}
1031 1846
1032/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1847/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1033inline_speed void 1848inline_speed void ecb_cold
1034fd_kill (EV_P_ int fd) 1849fd_kill (EV_P_ int fd)
1035{ 1850{
1036 ev_io *w; 1851 ev_io *w;
1037 1852
1038 while ((w = (ev_io *)anfds [fd].head)) 1853 while ((w = (ev_io *)anfds [fd].head))
… …
1041 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1856 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1042 } 1857 }
1043} 1858}
1044 1859
1045/* check whether the given fd is actually valid, for error recovery */ 1860/* check whether the given fd is actually valid, for error recovery */
1046inline_size int 1861inline_size int ecb_cold
1047fd_valid (int fd) 1862fd_valid (int fd)
1048{ 1863{
1049#ifdef _WIN32 1864#ifdef _WIN32
1050 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1865 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1051#else 1866#else
1052 return fcntl (fd, F_GETFD) != -1; 1867 return fcntl (fd, F_GETFD) != -1;
1053#endif 1868#endif
1054} 1869}
1055 1870
1056/* called on EBADF to verify fds */ 1871/* called on EBADF to verify fds */
1057static void noinline 1872static void noinline ecb_cold
1058fd_ebadf (EV_P) 1873fd_ebadf (EV_P)
1059{ 1874{
1060 int fd; 1875 int fd;
1061 1876
1062 for (fd = 0; fd < anfdmax; ++fd) 1877 for (fd = 0; fd < anfdmax; ++fd)
… …
1064 if (!fd_valid (fd) && errno == EBADF) 1879 if (!fd_valid (fd) && errno == EBADF)
1065 fd_kill (EV_A_ fd); 1880 fd_kill (EV_A_ fd);
1066} 1881}
1067 1882
1068/* called on ENOMEM in select/poll to kill some fds and retry */ 1883/* called on ENOMEM in select/poll to kill some fds and retry */
1069static void noinline 1884static void noinline ecb_cold
1070fd_enomem (EV_P) 1885fd_enomem (EV_P)
1071{ 1886{
1072 int fd; 1887 int fd;
1073 1888
1074 for (fd = anfdmax; fd--; ) 1889 for (fd = anfdmax; fd--; )
… …
1269 2084
1270/*****************************************************************************/ 2085/*****************************************************************************/
1271 2086
1272#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2087#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1273 2088
1274static void noinline 2089static void noinline ecb_cold
1275evpipe_init (EV_P) 2090evpipe_init (EV_P)
1276{ 2091{
1277 if (!ev_is_active (&pipe_w)) 2092 if (!ev_is_active (&pipe_w))
1278 { 2093 {
2094 int fds [2];
2095
1279# if EV_USE_EVENTFD 2096# if EV_USE_EVENTFD
2097 fds [0] = -1;
1280 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2098 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1281 if (evfd < 0 && errno == EINVAL) 2099 if (fds [1] < 0 && errno == EINVAL)
1282 evfd = eventfd (0, 0); 2100 fds [1] = eventfd (0, 0);
1283 2101
1284 if (evfd >= 0) 2102 if (fds [1] < 0)
2103# endif
1285 { 2104 {
2105 while (pipe (fds))
2106 ev_syserr ("(libev) error creating signal/async pipe");
2107
2108 fd_intern (fds [0]);
2109 }
2110
1286 evpipe [0] = -1; 2111 evpipe [0] = fds [0];
1287 fd_intern (evfd); /* doing it twice doesn't hurt */ 2112
1288 ev_io_set (&pipe_w, evfd, EV_READ); 2113 if (evpipe [1] < 0)
2114 evpipe [1] = fds [1]; /* first call, set write fd */
2115 else
2116 {
2117 /* on subsequent calls, do not change evpipe [1] */
2118 /* so that evpipe_write can always rely on its value. */
2119 /* this branch does not do anything sensible on windows, */
2120 /* so must not be executed on windows */
2121
2122 dup2 (fds [1], evpipe [1]);
2123 close (fds [1]);
2124 }
2125
2126 fd_intern (evpipe [1]);
2127
2128 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2129 ev_io_start (EV_A_ &pipe_w);
2130 ev_unref (EV_A); /* watcher should not keep loop alive */
2131 }
2132}
2133
2134inline_speed void
2135evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2136{
2137 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2138
2139 if (expect_true (*flag))
2140 return;
2141
2142 *flag = 1;
2143 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2144
2145 pipe_write_skipped = 1;
2146
2147 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2148
2149 if (pipe_write_wanted)
2150 {
2151 int old_errno;
2152
2153 pipe_write_skipped = 0;
2154 ECB_MEMORY_FENCE_RELEASE;
2155
2156 old_errno = errno; /* save errno because write will clobber it */
2157
2158#if EV_USE_EVENTFD
2159 if (evpipe [0] < 0)
2160 {
2161 uint64_t counter = 1;
2162 write (evpipe [1], &counter, sizeof (uint64_t));
1289 } 2163 }
1290 else 2164 else
1291# endif 2165#endif
1292 { 2166 {
1293 while (pipe (evpipe)) 2167#ifdef _WIN32
1294 ev_syserr ("(libev) error creating signal/async pipe"); 2168 WSABUF buf;
1295 2169 DWORD sent;
1296 fd_intern (evpipe [0]); 2170 buf.buf = &buf;
1297 fd_intern (evpipe [1]); 2171 buf.len = 1;
1298 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2172 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2173#else
2174 write (evpipe [1], &(evpipe [1]), 1);
2175#endif
1299 } 2176 }
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 2177
1331 errno = old_errno; 2178 errno = old_errno;
1332 } 2179 }
1333} 2180}
1334 2181
… …
1337static void 2184static void
1338pipecb (EV_P_ ev_io *iow, int revents) 2185pipecb (EV_P_ ev_io *iow, int revents)
1339{ 2186{
1340 int i; 2187 int i;
1341 2188
2189 if (revents & EV_READ)
2190 {
1342#if EV_USE_EVENTFD 2191#if EV_USE_EVENTFD
1343 if (evfd >= 0) 2192 if (evpipe [0] < 0)
1344 { 2193 {
1345 uint64_t counter; 2194 uint64_t counter;
1346 read (evfd, &counter, sizeof (uint64_t)); 2195 read (evpipe [1], &counter, sizeof (uint64_t));
1347 } 2196 }
1348 else 2197 else
1349#endif 2198#endif
1350 { 2199 {
1351 char dummy; 2200 char dummy[4];
1352 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2201#ifdef _WIN32
2202 WSABUF buf;
2203 DWORD recvd;
2204 DWORD flags = 0;
2205 buf.buf = dummy;
2206 buf.len = sizeof (dummy);
2207 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2208#else
1353 read (evpipe [0], &dummy, 1); 2209 read (evpipe [0], &dummy, sizeof (dummy));
2210#endif
2211 }
1354 } 2212 }
1355 2213
2214 pipe_write_skipped = 0;
2215
2216 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2217
2218#if EV_SIGNAL_ENABLE
1356 if (sig_pending) 2219 if (sig_pending)
1357 { 2220 {
1358 sig_pending = 0; 2221 sig_pending = 0;
2222
2223 ECB_MEMORY_FENCE;
1359 2224
1360 for (i = EV_NSIG - 1; i--; ) 2225 for (i = EV_NSIG - 1; i--; )
1361 if (expect_false (signals [i].pending)) 2226 if (expect_false (signals [i].pending))
1362 ev_feed_signal_event (EV_A_ i + 1); 2227 ev_feed_signal_event (EV_A_ i + 1);
1363 } 2228 }
2229#endif
1364 2230
1365#if EV_ASYNC_ENABLE 2231#if EV_ASYNC_ENABLE
1366 if (async_pending) 2232 if (async_pending)
1367 { 2233 {
1368 async_pending = 0; 2234 async_pending = 0;
2235
2236 ECB_MEMORY_FENCE;
1369 2237
1370 for (i = asynccnt; i--; ) 2238 for (i = asynccnt; i--; )
1371 if (asyncs [i]->sent) 2239 if (asyncs [i]->sent)
1372 { 2240 {
1373 asyncs [i]->sent = 0; 2241 asyncs [i]->sent = 0;
2242 ECB_MEMORY_FENCE_RELEASE;
1374 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2243 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1375 } 2244 }
1376 } 2245 }
1377#endif 2246#endif
1378} 2247}
1379 2248
1380/*****************************************************************************/ 2249/*****************************************************************************/
1381 2250
1382void 2251void
1383ev_feed_signal (int signum) 2252ev_feed_signal (int signum) EV_THROW
1384{ 2253{
1385#if EV_MULTIPLICITY 2254#if EV_MULTIPLICITY
2255 EV_P;
2256 ECB_MEMORY_FENCE_ACQUIRE;
1386 EV_P = signals [signum - 1].loop; 2257 EV_A = signals [signum - 1].loop;
1387 2258
1388 if (!EV_A) 2259 if (!EV_A)
1389 return; 2260 return;
1390#endif 2261#endif
1391 2262
… …
1402 2273
1403 ev_feed_signal (signum); 2274 ev_feed_signal (signum);
1404} 2275}
1405 2276
1406void noinline 2277void noinline
1407ev_feed_signal_event (EV_P_ int signum) 2278ev_feed_signal_event (EV_P_ int signum) EV_THROW
1408{ 2279{
1409 WL w; 2280 WL w;
1410 2281
1411 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2282 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1412 return; 2283 return;
1413 2284
1414 --signum; 2285 --signum;
1415 2286
1416#if EV_MULTIPLICITY 2287#if EV_MULTIPLICITY
… …
1420 if (expect_false (signals [signum].loop != EV_A)) 2291 if (expect_false (signals [signum].loop != EV_A))
1421 return; 2292 return;
1422#endif 2293#endif
1423 2294
1424 signals [signum].pending = 0; 2295 signals [signum].pending = 0;
2296 ECB_MEMORY_FENCE_RELEASE;
1425 2297
1426 for (w = signals [signum].head; w; w = w->next) 2298 for (w = signals [signum].head; w; w = w->next)
1427 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2299 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1428} 2300}
1429 2301
… …
1527#endif 2399#endif
1528#if EV_USE_SELECT 2400#if EV_USE_SELECT
1529# include "ev_select.c" 2401# include "ev_select.c"
1530#endif 2402#endif
1531 2403
1532int 2404int ecb_cold
1533ev_version_major (void) 2405ev_version_major (void) EV_THROW
1534{ 2406{
1535 return EV_VERSION_MAJOR; 2407 return EV_VERSION_MAJOR;
1536} 2408}
1537 2409
1538int 2410int ecb_cold
1539ev_version_minor (void) 2411ev_version_minor (void) EV_THROW
1540{ 2412{
1541 return EV_VERSION_MINOR; 2413 return EV_VERSION_MINOR;
1542} 2414}
1543 2415
1544/* return true if we are running with elevated privileges and should ignore env variables */ 2416/* return true if we are running with elevated privileges and should ignore env variables */
1545int inline_size 2417int inline_size ecb_cold
1546enable_secure (void) 2418enable_secure (void)
1547{ 2419{
1548#ifdef _WIN32 2420#ifdef _WIN32
1549 return 0; 2421 return 0;
1550#else 2422#else
1551 return getuid () != geteuid () 2423 return getuid () != geteuid ()
1552 || getgid () != getegid (); 2424 || getgid () != getegid ();
1553#endif 2425#endif
1554} 2426}
1555 2427
1556unsigned int 2428unsigned int ecb_cold
1557ev_supported_backends (void) 2429ev_supported_backends (void) EV_THROW
1558{ 2430{
1559 unsigned int flags = 0; 2431 unsigned int flags = 0;
1560 2432
1561 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2433 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1562 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2434 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1565 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2437 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1566 2438
1567 return flags; 2439 return flags;
1568} 2440}
1569 2441
1570unsigned int 2442unsigned int ecb_cold
1571ev_recommended_backends (void) 2443ev_recommended_backends (void) EV_THROW
1572{ 2444{
1573 unsigned int flags = ev_supported_backends (); 2445 unsigned int flags = ev_supported_backends ();
1574 2446
1575#ifndef __NetBSD__ 2447#ifndef __NetBSD__
1576 /* kqueue is borked on everything but netbsd apparently */ 2448 /* kqueue is borked on everything but netbsd apparently */
… …
1587#endif 2459#endif
1588 2460
1589 return flags; 2461 return flags;
1590} 2462}
1591 2463
1592unsigned int 2464unsigned int ecb_cold
1593ev_embeddable_backends (void) 2465ev_embeddable_backends (void) EV_THROW
1594{ 2466{
1595 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2467 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1596 2468
1597 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2469 /* 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 */ 2470 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1600 2472
1601 return flags; 2473 return flags;
1602} 2474}
1603 2475
1604unsigned int 2476unsigned int
1605ev_backend (EV_P) 2477ev_backend (EV_P) EV_THROW
1606{ 2478{
1607 return backend; 2479 return backend;
1608} 2480}
1609 2481
1610#if EV_FEATURE_API 2482#if EV_FEATURE_API
1611unsigned int 2483unsigned int
1612ev_iteration (EV_P) 2484ev_iteration (EV_P) EV_THROW
1613{ 2485{
1614 return loop_count; 2486 return loop_count;
1615} 2487}
1616 2488
1617unsigned int 2489unsigned int
1618ev_depth (EV_P) 2490ev_depth (EV_P) EV_THROW
1619{ 2491{
1620 return loop_depth; 2492 return loop_depth;
1621} 2493}
1622 2494
1623void 2495void
1624ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2496ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1625{ 2497{
1626 io_blocktime = interval; 2498 io_blocktime = interval;
1627} 2499}
1628 2500
1629void 2501void
1630ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2502ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1631{ 2503{
1632 timeout_blocktime = interval; 2504 timeout_blocktime = interval;
1633} 2505}
1634 2506
1635void 2507void
1636ev_set_userdata (EV_P_ void *data) 2508ev_set_userdata (EV_P_ void *data) EV_THROW
1637{ 2509{
1638 userdata = data; 2510 userdata = data;
1639} 2511}
1640 2512
1641void * 2513void *
1642ev_userdata (EV_P) 2514ev_userdata (EV_P) EV_THROW
1643{ 2515{
1644 return userdata; 2516 return userdata;
1645} 2517}
1646 2518
2519void
1647void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2520ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1648{ 2521{
1649 invoke_cb = invoke_pending_cb; 2522 invoke_cb = invoke_pending_cb;
1650} 2523}
1651 2524
2525void
1652void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2526ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1653{ 2527{
1654 release_cb = release; 2528 release_cb = release;
1655 acquire_cb = acquire; 2529 acquire_cb = acquire;
1656} 2530}
1657#endif 2531#endif
1658 2532
1659/* initialise a loop structure, must be zero-initialised */ 2533/* initialise a loop structure, must be zero-initialised */
1660static void noinline 2534static void noinline ecb_cold
1661loop_init (EV_P_ unsigned int flags) 2535loop_init (EV_P_ unsigned int flags) EV_THROW
1662{ 2536{
1663 if (!backend) 2537 if (!backend)
1664 { 2538 {
1665 origflags = flags; 2539 origflags = flags;
1666 2540
… …
1693 if (!(flags & EVFLAG_NOENV) 2567 if (!(flags & EVFLAG_NOENV)
1694 && !enable_secure () 2568 && !enable_secure ()
1695 && getenv ("LIBEV_FLAGS")) 2569 && getenv ("LIBEV_FLAGS"))
1696 flags = atoi (getenv ("LIBEV_FLAGS")); 2570 flags = atoi (getenv ("LIBEV_FLAGS"));
1697 2571
1698 ev_rt_now = ev_time (); 2572 ev_rt_now = ev_time ();
1699 mn_now = get_clock (); 2573 mn_now = get_clock ();
1700 now_floor = mn_now; 2574 now_floor = mn_now;
1701 rtmn_diff = ev_rt_now - mn_now; 2575 rtmn_diff = ev_rt_now - mn_now;
1702#if EV_FEATURE_API 2576#if EV_FEATURE_API
1703 invoke_cb = ev_invoke_pending; 2577 invoke_cb = ev_invoke_pending;
1704#endif 2578#endif
1705 2579
1706 io_blocktime = 0.; 2580 io_blocktime = 0.;
1707 timeout_blocktime = 0.; 2581 timeout_blocktime = 0.;
1708 backend = 0; 2582 backend = 0;
1709 backend_fd = -1; 2583 backend_fd = -1;
1710 sig_pending = 0; 2584 sig_pending = 0;
1711#if EV_ASYNC_ENABLE 2585#if EV_ASYNC_ENABLE
1712 async_pending = 0; 2586 async_pending = 0;
1713#endif 2587#endif
2588 pipe_write_skipped = 0;
2589 pipe_write_wanted = 0;
2590 evpipe [0] = -1;
2591 evpipe [1] = -1;
1714#if EV_USE_INOTIFY 2592#if EV_USE_INOTIFY
1715 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2593 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1716#endif 2594#endif
1717#if EV_USE_SIGNALFD 2595#if EV_USE_SIGNALFD
1718 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2596 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1719#endif 2597#endif
1720 2598
1721 if (!(flags & EVBACKEND_MASK)) 2599 if (!(flags & EVBACKEND_MASK))
1722 flags |= ev_recommended_backends (); 2600 flags |= ev_recommended_backends ();
1723 2601
… …
1748#endif 2626#endif
1749 } 2627 }
1750} 2628}
1751 2629
1752/* free up a loop structure */ 2630/* free up a loop structure */
1753void 2631void ecb_cold
1754ev_loop_destroy (EV_P) 2632ev_loop_destroy (EV_P)
1755{ 2633{
1756 int i; 2634 int i;
1757 2635
1758#if EV_MULTIPLICITY 2636#if EV_MULTIPLICITY
… …
1769 EV_INVOKE_PENDING; 2647 EV_INVOKE_PENDING;
1770 } 2648 }
1771#endif 2649#endif
1772 2650
1773#if EV_CHILD_ENABLE 2651#if EV_CHILD_ENABLE
1774 if (ev_is_active (&childev)) 2652 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1775 { 2653 {
1776 ev_ref (EV_A); /* child watcher */ 2654 ev_ref (EV_A); /* child watcher */
1777 ev_signal_stop (EV_A_ &childev); 2655 ev_signal_stop (EV_A_ &childev);
1778 } 2656 }
1779#endif 2657#endif
… …
1781 if (ev_is_active (&pipe_w)) 2659 if (ev_is_active (&pipe_w))
1782 { 2660 {
1783 /*ev_ref (EV_A);*/ 2661 /*ev_ref (EV_A);*/
1784 /*ev_io_stop (EV_A_ &pipe_w);*/ 2662 /*ev_io_stop (EV_A_ &pipe_w);*/
1785 2663
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]); 2664 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1794 EV_WIN32_CLOSE_FD (evpipe [1]); 2665 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1795 }
1796 } 2666 }
1797 2667
1798#if EV_USE_SIGNALFD 2668#if EV_USE_SIGNALFD
1799 if (ev_is_active (&sigfd_w)) 2669 if (ev_is_active (&sigfd_w))
1800 close (sigfd); 2670 close (sigfd);
… …
1886#endif 2756#endif
1887#if EV_USE_INOTIFY 2757#if EV_USE_INOTIFY
1888 infy_fork (EV_A); 2758 infy_fork (EV_A);
1889#endif 2759#endif
1890 2760
2761#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1891 if (ev_is_active (&pipe_w)) 2762 if (ev_is_active (&pipe_w))
1892 { 2763 {
1893 /* this "locks" the handlers against writing to the pipe */ 2764 /* 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 2765
1900 ev_ref (EV_A); 2766 ev_ref (EV_A);
1901 ev_io_stop (EV_A_ &pipe_w); 2767 ev_io_stop (EV_A_ &pipe_w);
1902 2768
1903#if EV_USE_EVENTFD
1904 if (evfd >= 0)
1905 close (evfd);
1906#endif
1907
1908 if (evpipe [0] >= 0) 2769 if (evpipe [0] >= 0)
1909 {
1910 EV_WIN32_CLOSE_FD (evpipe [0]); 2770 EV_WIN32_CLOSE_FD (evpipe [0]);
1911 EV_WIN32_CLOSE_FD (evpipe [1]);
1912 }
1913 2771
1914#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1915 evpipe_init (EV_A); 2772 evpipe_init (EV_A);
1916 /* now iterate over everything, in case we missed something */ 2773 /* iterate over everything, in case we missed something before */
1917 pipecb (EV_A_ &pipe_w, EV_READ); 2774 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1918#endif
1919 } 2775 }
2776#endif
1920 2777
1921 postfork = 0; 2778 postfork = 0;
1922} 2779}
1923 2780
1924#if EV_MULTIPLICITY 2781#if EV_MULTIPLICITY
1925 2782
1926struct ev_loop * 2783struct ev_loop * ecb_cold
1927ev_loop_new (unsigned int flags) 2784ev_loop_new (unsigned int flags) EV_THROW
1928{ 2785{
1929 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2786 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1930 2787
1931 memset (EV_A, 0, sizeof (struct ev_loop)); 2788 memset (EV_A, 0, sizeof (struct ev_loop));
1932 loop_init (EV_A_ flags); 2789 loop_init (EV_A_ flags);
… …
1939} 2796}
1940 2797
1941#endif /* multiplicity */ 2798#endif /* multiplicity */
1942 2799
1943#if EV_VERIFY 2800#if EV_VERIFY
1944static void noinline 2801static void noinline ecb_cold
1945verify_watcher (EV_P_ W w) 2802verify_watcher (EV_P_ W w)
1946{ 2803{
1947 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2804 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1948 2805
1949 if (w->pending) 2806 if (w->pending)
1950 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2807 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1951} 2808}
1952 2809
1953static void noinline 2810static void noinline ecb_cold
1954verify_heap (EV_P_ ANHE *heap, int N) 2811verify_heap (EV_P_ ANHE *heap, int N)
1955{ 2812{
1956 int i; 2813 int i;
1957 2814
1958 for (i = HEAP0; i < N + HEAP0; ++i) 2815 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1963 2820
1964 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2821 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1965 } 2822 }
1966} 2823}
1967 2824
1968static void noinline 2825static void noinline ecb_cold
1969array_verify (EV_P_ W *ws, int cnt) 2826array_verify (EV_P_ W *ws, int cnt)
1970{ 2827{
1971 while (cnt--) 2828 while (cnt--)
1972 { 2829 {
1973 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2830 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1975 } 2832 }
1976} 2833}
1977#endif 2834#endif
1978 2835
1979#if EV_FEATURE_API 2836#if EV_FEATURE_API
1980void 2837void ecb_cold
1981ev_verify (EV_P) 2838ev_verify (EV_P) EV_THROW
1982{ 2839{
1983#if EV_VERIFY 2840#if EV_VERIFY
1984 int i; 2841 int i;
1985 WL w; 2842 WL w, w2;
1986 2843
1987 assert (activecnt >= -1); 2844 assert (activecnt >= -1);
1988 2845
1989 assert (fdchangemax >= fdchangecnt); 2846 assert (fdchangemax >= fdchangecnt);
1990 for (i = 0; i < fdchangecnt; ++i) 2847 for (i = 0; i < fdchangecnt; ++i)
1991 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2848 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1992 2849
1993 assert (anfdmax >= 0); 2850 assert (anfdmax >= 0);
1994 for (i = 0; i < anfdmax; ++i) 2851 for (i = 0; i < anfdmax; ++i)
2852 {
2853 int j = 0;
2854
1995 for (w = anfds [i].head; w; w = w->next) 2855 for (w = w2 = anfds [i].head; w; w = w->next)
1996 { 2856 {
1997 verify_watcher (EV_A_ (W)w); 2857 verify_watcher (EV_A_ (W)w);
2858
2859 if (j++ & 1)
2860 {
2861 assert (("libev: io watcher list contains a loop", w != w2));
2862 w2 = w2->next;
2863 }
2864
1998 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2865 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)); 2866 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2000 } 2867 }
2868 }
2001 2869
2002 assert (timermax >= timercnt); 2870 assert (timermax >= timercnt);
2003 verify_heap (EV_A_ timers, timercnt); 2871 verify_heap (EV_A_ timers, timercnt);
2004 2872
2005#if EV_PERIODIC_ENABLE 2873#if EV_PERIODIC_ENABLE
… …
2051#endif 2919#endif
2052} 2920}
2053#endif 2921#endif
2054 2922
2055#if EV_MULTIPLICITY 2923#if EV_MULTIPLICITY
2056struct ev_loop * 2924struct ev_loop * ecb_cold
2057#else 2925#else
2058int 2926int
2059#endif 2927#endif
2060ev_default_loop (unsigned int flags) 2928ev_default_loop (unsigned int flags) EV_THROW
2061{ 2929{
2062 if (!ev_default_loop_ptr) 2930 if (!ev_default_loop_ptr)
2063 { 2931 {
2064#if EV_MULTIPLICITY 2932#if EV_MULTIPLICITY
2065 EV_P = ev_default_loop_ptr = &default_loop_struct; 2933 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2084 2952
2085 return ev_default_loop_ptr; 2953 return ev_default_loop_ptr;
2086} 2954}
2087 2955
2088void 2956void
2089ev_loop_fork (EV_P) 2957ev_loop_fork (EV_P) EV_THROW
2090{ 2958{
2091 postfork = 1; /* must be in line with ev_default_fork */ 2959 postfork = 1;
2092} 2960}
2093 2961
2094/*****************************************************************************/ 2962/*****************************************************************************/
2095 2963
2096void 2964void
… …
2098{ 2966{
2099 EV_CB_INVOKE ((W)w, revents); 2967 EV_CB_INVOKE ((W)w, revents);
2100} 2968}
2101 2969
2102unsigned int 2970unsigned int
2103ev_pending_count (EV_P) 2971ev_pending_count (EV_P) EV_THROW
2104{ 2972{
2105 int pri; 2973 int pri;
2106 unsigned int count = 0; 2974 unsigned int count = 0;
2107 2975
2108 for (pri = NUMPRI; pri--; ) 2976 for (pri = NUMPRI; pri--; )
… …
2112} 2980}
2113 2981
2114void noinline 2982void noinline
2115ev_invoke_pending (EV_P) 2983ev_invoke_pending (EV_P)
2116{ 2984{
2117 int pri; 2985 pendingpri = NUMPRI;
2118 2986
2119 for (pri = NUMPRI; pri--; ) 2987 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2988 {
2989 --pendingpri;
2990
2120 while (pendingcnt [pri]) 2991 while (pendingcnt [pendingpri])
2121 { 2992 {
2122 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2993 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2123 2994
2124 p->w->pending = 0; 2995 p->w->pending = 0;
2125 EV_CB_INVOKE (p->w, p->events); 2996 EV_CB_INVOKE (p->w, p->events);
2126 EV_FREQUENT_CHECK; 2997 EV_FREQUENT_CHECK;
2127 } 2998 }
2999 }
2128} 3000}
2129 3001
2130#if EV_IDLE_ENABLE 3002#if EV_IDLE_ENABLE
2131/* make idle watchers pending. this handles the "call-idle */ 3003/* make idle watchers pending. this handles the "call-idle */
2132/* only when higher priorities are idle" logic */ 3004/* only when higher priorities are idle" logic */
… …
2189 feed_reverse_done (EV_A_ EV_TIMER); 3061 feed_reverse_done (EV_A_ EV_TIMER);
2190 } 3062 }
2191} 3063}
2192 3064
2193#if EV_PERIODIC_ENABLE 3065#if EV_PERIODIC_ENABLE
3066
3067static void noinline
3068periodic_recalc (EV_P_ ev_periodic *w)
3069{
3070 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3071 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3072
3073 /* the above almost always errs on the low side */
3074 while (at <= ev_rt_now)
3075 {
3076 ev_tstamp nat = at + w->interval;
3077
3078 /* when resolution fails us, we use ev_rt_now */
3079 if (expect_false (nat == at))
3080 {
3081 at = ev_rt_now;
3082 break;
3083 }
3084
3085 at = nat;
3086 }
3087
3088 ev_at (w) = at;
3089}
3090
2194/* make periodics pending */ 3091/* make periodics pending */
2195inline_size void 3092inline_size void
2196periodics_reify (EV_P) 3093periodics_reify (EV_P)
2197{ 3094{
2198 EV_FREQUENT_CHECK; 3095 EV_FREQUENT_CHECK;
2199 3096
2200 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3097 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2201 { 3098 {
2202 int feed_count = 0;
2203
2204 do 3099 do
2205 { 3100 {
2206 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3101 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2207 3102
2208 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3103 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2217 ANHE_at_cache (periodics [HEAP0]); 3112 ANHE_at_cache (periodics [HEAP0]);
2218 downheap (periodics, periodiccnt, HEAP0); 3113 downheap (periodics, periodiccnt, HEAP0);
2219 } 3114 }
2220 else if (w->interval) 3115 else if (w->interval)
2221 { 3116 {
2222 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3117 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]); 3118 ANHE_at_cache (periodics [HEAP0]);
2237 downheap (periodics, periodiccnt, HEAP0); 3119 downheap (periodics, periodiccnt, HEAP0);
2238 } 3120 }
2239 else 3121 else
2240 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3122 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2248 } 3130 }
2249} 3131}
2250 3132
2251/* simply recalculate all periodics */ 3133/* simply recalculate all periodics */
2252/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3134/* TODO: maybe ensure that at least one event happens when jumping forward? */
2253static void noinline 3135static void noinline ecb_cold
2254periodics_reschedule (EV_P) 3136periodics_reschedule (EV_P)
2255{ 3137{
2256 int i; 3138 int i;
2257 3139
2258 /* adjust periodics after time jump */ 3140 /* adjust periodics after time jump */
… …
2261 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3143 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2262 3144
2263 if (w->reschedule_cb) 3145 if (w->reschedule_cb)
2264 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3146 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2265 else if (w->interval) 3147 else if (w->interval)
2266 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3148 periodic_recalc (EV_A_ w);
2267 3149
2268 ANHE_at_cache (periodics [i]); 3150 ANHE_at_cache (periodics [i]);
2269 } 3151 }
2270 3152
2271 reheap (periodics, periodiccnt); 3153 reheap (periodics, periodiccnt);
2272} 3154}
2273#endif 3155#endif
2274 3156
2275/* adjust all timers by a given offset */ 3157/* adjust all timers by a given offset */
2276static void noinline 3158static void noinline ecb_cold
2277timers_reschedule (EV_P_ ev_tstamp adjust) 3159timers_reschedule (EV_P_ ev_tstamp adjust)
2278{ 3160{
2279 int i; 3161 int i;
2280 3162
2281 for (i = 0; i < timercnt; ++i) 3163 for (i = 0; i < timercnt; ++i)
… …
2318 * doesn't hurt either as we only do this on time-jumps or 3200 * doesn't hurt either as we only do this on time-jumps or
2319 * in the unlikely event of having been preempted here. 3201 * in the unlikely event of having been preempted here.
2320 */ 3202 */
2321 for (i = 4; --i; ) 3203 for (i = 4; --i; )
2322 { 3204 {
3205 ev_tstamp diff;
2323 rtmn_diff = ev_rt_now - mn_now; 3206 rtmn_diff = ev_rt_now - mn_now;
2324 3207
3208 diff = odiff - rtmn_diff;
3209
2325 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3210 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2326 return; /* all is well */ 3211 return; /* all is well */
2327 3212
2328 ev_rt_now = ev_time (); 3213 ev_rt_now = ev_time ();
2329 mn_now = get_clock (); 3214 mn_now = get_clock ();
2330 now_floor = mn_now; 3215 now_floor = mn_now;
… …
2352 3237
2353 mn_now = ev_rt_now; 3238 mn_now = ev_rt_now;
2354 } 3239 }
2355} 3240}
2356 3241
2357void 3242int
2358ev_run (EV_P_ int flags) 3243ev_run (EV_P_ int flags)
2359{ 3244{
2360#if EV_FEATURE_API 3245#if EV_FEATURE_API
2361 ++loop_depth; 3246 ++loop_depth;
2362#endif 3247#endif
… …
2420 ev_tstamp prev_mn_now = mn_now; 3305 ev_tstamp prev_mn_now = mn_now;
2421 3306
2422 /* update time to cancel out callback processing overhead */ 3307 /* update time to cancel out callback processing overhead */
2423 time_update (EV_A_ 1e100); 3308 time_update (EV_A_ 1e100);
2424 3309
3310 /* from now on, we want a pipe-wake-up */
3311 pipe_write_wanted = 1;
3312
3313 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3314
2425 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3315 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2426 { 3316 {
2427 waittime = MAX_BLOCKTIME; 3317 waittime = MAX_BLOCKTIME;
2428 3318
2429 if (timercnt) 3319 if (timercnt)
2430 { 3320 {
2431 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3321 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2432 if (waittime > to) waittime = to; 3322 if (waittime > to) waittime = to;
2433 } 3323 }
2434 3324
2435#if EV_PERIODIC_ENABLE 3325#if EV_PERIODIC_ENABLE
2436 if (periodiccnt) 3326 if (periodiccnt)
2437 { 3327 {
2438 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3328 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2439 if (waittime > to) waittime = to; 3329 if (waittime > to) waittime = to;
2440 } 3330 }
2441#endif 3331#endif
2442 3332
2443 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3333 /* don't let timeouts decrease the waittime below timeout_blocktime */
2444 if (expect_false (waittime < timeout_blocktime)) 3334 if (expect_false (waittime < timeout_blocktime))
2445 waittime = timeout_blocktime; 3335 waittime = timeout_blocktime;
3336
3337 /* at this point, we NEED to wait, so we have to ensure */
3338 /* to pass a minimum nonzero value to the backend */
3339 if (expect_false (waittime < backend_mintime))
3340 waittime = backend_mintime;
2446 3341
2447 /* extra check because io_blocktime is commonly 0 */ 3342 /* extra check because io_blocktime is commonly 0 */
2448 if (expect_false (io_blocktime)) 3343 if (expect_false (io_blocktime))
2449 { 3344 {
2450 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3345 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2451 3346
2452 if (sleeptime > waittime - backend_fudge) 3347 if (sleeptime > waittime - backend_mintime)
2453 sleeptime = waittime - backend_fudge; 3348 sleeptime = waittime - backend_mintime;
2454 3349
2455 if (expect_true (sleeptime > 0.)) 3350 if (expect_true (sleeptime > 0.))
2456 { 3351 {
2457 ev_sleep (sleeptime); 3352 ev_sleep (sleeptime);
2458 waittime -= sleeptime; 3353 waittime -= sleeptime;
… …
2465#endif 3360#endif
2466 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3361 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2467 backend_poll (EV_A_ waittime); 3362 backend_poll (EV_A_ waittime);
2468 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3363 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2469 3364
3365 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3366
3367 ECB_MEMORY_FENCE_ACQUIRE;
3368 if (pipe_write_skipped)
3369 {
3370 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3371 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3372 }
3373
3374
2470 /* update ev_rt_now, do magic */ 3375 /* update ev_rt_now, do magic */
2471 time_update (EV_A_ waittime + sleeptime); 3376 time_update (EV_A_ waittime + sleeptime);
2472 } 3377 }
2473 3378
2474 /* queue pending timers and reschedule them */ 3379 /* queue pending timers and reschedule them */
… …
2500 loop_done = EVBREAK_CANCEL; 3405 loop_done = EVBREAK_CANCEL;
2501 3406
2502#if EV_FEATURE_API 3407#if EV_FEATURE_API
2503 --loop_depth; 3408 --loop_depth;
2504#endif 3409#endif
3410
3411 return activecnt;
2505} 3412}
2506 3413
2507void 3414void
2508ev_break (EV_P_ int how) 3415ev_break (EV_P_ int how) EV_THROW
2509{ 3416{
2510 loop_done = how; 3417 loop_done = how;
2511} 3418}
2512 3419
2513void 3420void
2514ev_ref (EV_P) 3421ev_ref (EV_P) EV_THROW
2515{ 3422{
2516 ++activecnt; 3423 ++activecnt;
2517} 3424}
2518 3425
2519void 3426void
2520ev_unref (EV_P) 3427ev_unref (EV_P) EV_THROW
2521{ 3428{
2522 --activecnt; 3429 --activecnt;
2523} 3430}
2524 3431
2525void 3432void
2526ev_now_update (EV_P) 3433ev_now_update (EV_P) EV_THROW
2527{ 3434{
2528 time_update (EV_A_ 1e100); 3435 time_update (EV_A_ 1e100);
2529} 3436}
2530 3437
2531void 3438void
2532ev_suspend (EV_P) 3439ev_suspend (EV_P) EV_THROW
2533{ 3440{
2534 ev_now_update (EV_A); 3441 ev_now_update (EV_A);
2535} 3442}
2536 3443
2537void 3444void
2538ev_resume (EV_P) 3445ev_resume (EV_P) EV_THROW
2539{ 3446{
2540 ev_tstamp mn_prev = mn_now; 3447 ev_tstamp mn_prev = mn_now;
2541 3448
2542 ev_now_update (EV_A); 3449 ev_now_update (EV_A);
2543 timers_reschedule (EV_A_ mn_now - mn_prev); 3450 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2582 w->pending = 0; 3489 w->pending = 0;
2583 } 3490 }
2584} 3491}
2585 3492
2586int 3493int
2587ev_clear_pending (EV_P_ void *w) 3494ev_clear_pending (EV_P_ void *w) EV_THROW
2588{ 3495{
2589 W w_ = (W)w; 3496 W w_ = (W)w;
2590 int pending = w_->pending; 3497 int pending = w_->pending;
2591 3498
2592 if (expect_true (pending)) 3499 if (expect_true (pending))
… …
2625} 3532}
2626 3533
2627/*****************************************************************************/ 3534/*****************************************************************************/
2628 3535
2629void noinline 3536void noinline
2630ev_io_start (EV_P_ ev_io *w) 3537ev_io_start (EV_P_ ev_io *w) EV_THROW
2631{ 3538{
2632 int fd = w->fd; 3539 int fd = w->fd;
2633 3540
2634 if (expect_false (ev_is_active (w))) 3541 if (expect_false (ev_is_active (w)))
2635 return; 3542 return;
… …
2641 3548
2642 ev_start (EV_A_ (W)w, 1); 3549 ev_start (EV_A_ (W)w, 1);
2643 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3550 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2644 wlist_add (&anfds[fd].head, (WL)w); 3551 wlist_add (&anfds[fd].head, (WL)w);
2645 3552
3553 /* common bug, apparently */
3554 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3555
2646 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3556 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2647 w->events &= ~EV__IOFDSET; 3557 w->events &= ~EV__IOFDSET;
2648 3558
2649 EV_FREQUENT_CHECK; 3559 EV_FREQUENT_CHECK;
2650} 3560}
2651 3561
2652void noinline 3562void noinline
2653ev_io_stop (EV_P_ ev_io *w) 3563ev_io_stop (EV_P_ ev_io *w) EV_THROW
2654{ 3564{
2655 clear_pending (EV_A_ (W)w); 3565 clear_pending (EV_A_ (W)w);
2656 if (expect_false (!ev_is_active (w))) 3566 if (expect_false (!ev_is_active (w)))
2657 return; 3567 return;
2658 3568
… …
2667 3577
2668 EV_FREQUENT_CHECK; 3578 EV_FREQUENT_CHECK;
2669} 3579}
2670 3580
2671void noinline 3581void noinline
2672ev_timer_start (EV_P_ ev_timer *w) 3582ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2673{ 3583{
2674 if (expect_false (ev_is_active (w))) 3584 if (expect_false (ev_is_active (w)))
2675 return; 3585 return;
2676 3586
2677 ev_at (w) += mn_now; 3587 ev_at (w) += mn_now;
… …
2691 3601
2692 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3602 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2693} 3603}
2694 3604
2695void noinline 3605void noinline
2696ev_timer_stop (EV_P_ ev_timer *w) 3606ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2697{ 3607{
2698 clear_pending (EV_A_ (W)w); 3608 clear_pending (EV_A_ (W)w);
2699 if (expect_false (!ev_is_active (w))) 3609 if (expect_false (!ev_is_active (w)))
2700 return; 3610 return;
2701 3611
… …
2721 3631
2722 EV_FREQUENT_CHECK; 3632 EV_FREQUENT_CHECK;
2723} 3633}
2724 3634
2725void noinline 3635void noinline
2726ev_timer_again (EV_P_ ev_timer *w) 3636ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2727{ 3637{
2728 EV_FREQUENT_CHECK; 3638 EV_FREQUENT_CHECK;
3639
3640 clear_pending (EV_A_ (W)w);
2729 3641
2730 if (ev_is_active (w)) 3642 if (ev_is_active (w))
2731 { 3643 {
2732 if (w->repeat) 3644 if (w->repeat)
2733 { 3645 {
… …
2746 3658
2747 EV_FREQUENT_CHECK; 3659 EV_FREQUENT_CHECK;
2748} 3660}
2749 3661
2750ev_tstamp 3662ev_tstamp
2751ev_timer_remaining (EV_P_ ev_timer *w) 3663ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2752{ 3664{
2753 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3665 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2754} 3666}
2755 3667
2756#if EV_PERIODIC_ENABLE 3668#if EV_PERIODIC_ENABLE
2757void noinline 3669void noinline
2758ev_periodic_start (EV_P_ ev_periodic *w) 3670ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2759{ 3671{
2760 if (expect_false (ev_is_active (w))) 3672 if (expect_false (ev_is_active (w)))
2761 return; 3673 return;
2762 3674
2763 if (w->reschedule_cb) 3675 if (w->reschedule_cb)
2764 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3676 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2765 else if (w->interval) 3677 else if (w->interval)
2766 { 3678 {
2767 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3679 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 */ 3680 periodic_recalc (EV_A_ w);
2769 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2770 } 3681 }
2771 else 3682 else
2772 ev_at (w) = w->offset; 3683 ev_at (w) = w->offset;
2773 3684
2774 EV_FREQUENT_CHECK; 3685 EV_FREQUENT_CHECK;
… …
2784 3695
2785 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3696 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2786} 3697}
2787 3698
2788void noinline 3699void noinline
2789ev_periodic_stop (EV_P_ ev_periodic *w) 3700ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2790{ 3701{
2791 clear_pending (EV_A_ (W)w); 3702 clear_pending (EV_A_ (W)w);
2792 if (expect_false (!ev_is_active (w))) 3703 if (expect_false (!ev_is_active (w)))
2793 return; 3704 return;
2794 3705
… …
2812 3723
2813 EV_FREQUENT_CHECK; 3724 EV_FREQUENT_CHECK;
2814} 3725}
2815 3726
2816void noinline 3727void noinline
2817ev_periodic_again (EV_P_ ev_periodic *w) 3728ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2818{ 3729{
2819 /* TODO: use adjustheap and recalculation */ 3730 /* TODO: use adjustheap and recalculation */
2820 ev_periodic_stop (EV_A_ w); 3731 ev_periodic_stop (EV_A_ w);
2821 ev_periodic_start (EV_A_ w); 3732 ev_periodic_start (EV_A_ w);
2822} 3733}
… …
2827#endif 3738#endif
2828 3739
2829#if EV_SIGNAL_ENABLE 3740#if EV_SIGNAL_ENABLE
2830 3741
2831void noinline 3742void noinline
2832ev_signal_start (EV_P_ ev_signal *w) 3743ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2833{ 3744{
2834 if (expect_false (ev_is_active (w))) 3745 if (expect_false (ev_is_active (w)))
2835 return; 3746 return;
2836 3747
2837 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3748 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2839#if EV_MULTIPLICITY 3750#if EV_MULTIPLICITY
2840 assert (("libev: a signal must not be attached to two different loops", 3751 assert (("libev: a signal must not be attached to two different loops",
2841 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3752 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2842 3753
2843 signals [w->signum - 1].loop = EV_A; 3754 signals [w->signum - 1].loop = EV_A;
3755 ECB_MEMORY_FENCE_RELEASE;
2844#endif 3756#endif
2845 3757
2846 EV_FREQUENT_CHECK; 3758 EV_FREQUENT_CHECK;
2847 3759
2848#if EV_USE_SIGNALFD 3760#if EV_USE_SIGNALFD
… …
2908 3820
2909 EV_FREQUENT_CHECK; 3821 EV_FREQUENT_CHECK;
2910} 3822}
2911 3823
2912void noinline 3824void noinline
2913ev_signal_stop (EV_P_ ev_signal *w) 3825ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2914{ 3826{
2915 clear_pending (EV_A_ (W)w); 3827 clear_pending (EV_A_ (W)w);
2916 if (expect_false (!ev_is_active (w))) 3828 if (expect_false (!ev_is_active (w)))
2917 return; 3829 return;
2918 3830
… …
2949#endif 3861#endif
2950 3862
2951#if EV_CHILD_ENABLE 3863#if EV_CHILD_ENABLE
2952 3864
2953void 3865void
2954ev_child_start (EV_P_ ev_child *w) 3866ev_child_start (EV_P_ ev_child *w) EV_THROW
2955{ 3867{
2956#if EV_MULTIPLICITY 3868#if EV_MULTIPLICITY
2957 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3869 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2958#endif 3870#endif
2959 if (expect_false (ev_is_active (w))) 3871 if (expect_false (ev_is_active (w)))
… …
2966 3878
2967 EV_FREQUENT_CHECK; 3879 EV_FREQUENT_CHECK;
2968} 3880}
2969 3881
2970void 3882void
2971ev_child_stop (EV_P_ ev_child *w) 3883ev_child_stop (EV_P_ ev_child *w) EV_THROW
2972{ 3884{
2973 clear_pending (EV_A_ (W)w); 3885 clear_pending (EV_A_ (W)w);
2974 if (expect_false (!ev_is_active (w))) 3886 if (expect_false (!ev_is_active (w)))
2975 return; 3887 return;
2976 3888
… …
3003# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3915# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3004 3916
3005static void noinline 3917static void noinline
3006infy_add (EV_P_ ev_stat *w) 3918infy_add (EV_P_ ev_stat *w)
3007{ 3919{
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); 3920 w->wd = inotify_add_watch (fs_fd, w->path,
3921 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3922 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3923 | IN_DONT_FOLLOW | IN_MASK_ADD);
3009 3924
3010 if (w->wd >= 0) 3925 if (w->wd >= 0)
3011 { 3926 {
3012 struct statfs sfs; 3927 struct statfs sfs;
3013 3928
… …
3017 3932
3018 if (!fs_2625) 3933 if (!fs_2625)
3019 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3934 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3020 else if (!statfs (w->path, &sfs) 3935 else if (!statfs (w->path, &sfs)
3021 && (sfs.f_type == 0x1373 /* devfs */ 3936 && (sfs.f_type == 0x1373 /* devfs */
3937 || sfs.f_type == 0x4006 /* fat */
3938 || sfs.f_type == 0x4d44 /* msdos */
3022 || sfs.f_type == 0xEF53 /* ext2/3 */ 3939 || sfs.f_type == 0xEF53 /* ext2/3 */
3940 || sfs.f_type == 0x72b6 /* jffs2 */
3941 || sfs.f_type == 0x858458f6 /* ramfs */
3942 || sfs.f_type == 0x5346544e /* ntfs */
3023 || sfs.f_type == 0x3153464a /* jfs */ 3943 || sfs.f_type == 0x3153464a /* jfs */
3944 || sfs.f_type == 0x9123683e /* btrfs */
3024 || sfs.f_type == 0x52654973 /* reiser3 */ 3945 || sfs.f_type == 0x52654973 /* reiser3 */
3025 || sfs.f_type == 0x01021994 /* tempfs */ 3946 || sfs.f_type == 0x01021994 /* tmpfs */
3026 || sfs.f_type == 0x58465342 /* xfs */)) 3947 || sfs.f_type == 0x58465342 /* xfs */))
3027 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3948 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3028 else 3949 else
3029 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3950 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3030 } 3951 }
… …
3051 if (!pend || pend == path) 3972 if (!pend || pend == path)
3052 break; 3973 break;
3053 3974
3054 *pend = 0; 3975 *pend = 0;
3055 w->wd = inotify_add_watch (fs_fd, path, mask); 3976 w->wd = inotify_add_watch (fs_fd, path, mask);
3056 } 3977 }
3057 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3978 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3058 } 3979 }
3059 } 3980 }
3060 3981
3061 if (w->wd >= 0) 3982 if (w->wd >= 0)
… …
3128 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4049 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3129 ofs += sizeof (struct inotify_event) + ev->len; 4050 ofs += sizeof (struct inotify_event) + ev->len;
3130 } 4051 }
3131} 4052}
3132 4053
3133inline_size void 4054inline_size void ecb_cold
3134ev_check_2625 (EV_P) 4055ev_check_2625 (EV_P)
3135{ 4056{
3136 /* kernels < 2.6.25 are borked 4057 /* kernels < 2.6.25 are borked
3137 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4058 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3138 */ 4059 */
… …
3143} 4064}
3144 4065
3145inline_size int 4066inline_size int
3146infy_newfd (void) 4067infy_newfd (void)
3147{ 4068{
3148#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4069#if defined IN_CLOEXEC && defined IN_NONBLOCK
3149 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4070 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3150 if (fd >= 0) 4071 if (fd >= 0)
3151 return fd; 4072 return fd;
3152#endif 4073#endif
3153 return inotify_init (); 4074 return inotify_init ();
… …
3228#else 4149#else
3229# define EV_LSTAT(p,b) lstat (p, b) 4150# define EV_LSTAT(p,b) lstat (p, b)
3230#endif 4151#endif
3231 4152
3232void 4153void
3233ev_stat_stat (EV_P_ ev_stat *w) 4154ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3234{ 4155{
3235 if (lstat (w->path, &w->attr) < 0) 4156 if (lstat (w->path, &w->attr) < 0)
3236 w->attr.st_nlink = 0; 4157 w->attr.st_nlink = 0;
3237 else if (!w->attr.st_nlink) 4158 else if (!w->attr.st_nlink)
3238 w->attr.st_nlink = 1; 4159 w->attr.st_nlink = 1;
… …
3277 ev_feed_event (EV_A_ w, EV_STAT); 4198 ev_feed_event (EV_A_ w, EV_STAT);
3278 } 4199 }
3279} 4200}
3280 4201
3281void 4202void
3282ev_stat_start (EV_P_ ev_stat *w) 4203ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3283{ 4204{
3284 if (expect_false (ev_is_active (w))) 4205 if (expect_false (ev_is_active (w)))
3285 return; 4206 return;
3286 4207
3287 ev_stat_stat (EV_A_ w); 4208 ev_stat_stat (EV_A_ w);
… …
3308 4229
3309 EV_FREQUENT_CHECK; 4230 EV_FREQUENT_CHECK;
3310} 4231}
3311 4232
3312void 4233void
3313ev_stat_stop (EV_P_ ev_stat *w) 4234ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3314{ 4235{
3315 clear_pending (EV_A_ (W)w); 4236 clear_pending (EV_A_ (W)w);
3316 if (expect_false (!ev_is_active (w))) 4237 if (expect_false (!ev_is_active (w)))
3317 return; 4238 return;
3318 4239
… …
3334} 4255}
3335#endif 4256#endif
3336 4257
3337#if EV_IDLE_ENABLE 4258#if EV_IDLE_ENABLE
3338void 4259void
3339ev_idle_start (EV_P_ ev_idle *w) 4260ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3340{ 4261{
3341 if (expect_false (ev_is_active (w))) 4262 if (expect_false (ev_is_active (w)))
3342 return; 4263 return;
3343 4264
3344 pri_adjust (EV_A_ (W)w); 4265 pri_adjust (EV_A_ (W)w);
… …
3357 4278
3358 EV_FREQUENT_CHECK; 4279 EV_FREQUENT_CHECK;
3359} 4280}
3360 4281
3361void 4282void
3362ev_idle_stop (EV_P_ ev_idle *w) 4283ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3363{ 4284{
3364 clear_pending (EV_A_ (W)w); 4285 clear_pending (EV_A_ (W)w);
3365 if (expect_false (!ev_is_active (w))) 4286 if (expect_false (!ev_is_active (w)))
3366 return; 4287 return;
3367 4288
… …
3381} 4302}
3382#endif 4303#endif
3383 4304
3384#if EV_PREPARE_ENABLE 4305#if EV_PREPARE_ENABLE
3385void 4306void
3386ev_prepare_start (EV_P_ ev_prepare *w) 4307ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3387{ 4308{
3388 if (expect_false (ev_is_active (w))) 4309 if (expect_false (ev_is_active (w)))
3389 return; 4310 return;
3390 4311
3391 EV_FREQUENT_CHECK; 4312 EV_FREQUENT_CHECK;
… …
3396 4317
3397 EV_FREQUENT_CHECK; 4318 EV_FREQUENT_CHECK;
3398} 4319}
3399 4320
3400void 4321void
3401ev_prepare_stop (EV_P_ ev_prepare *w) 4322ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3402{ 4323{
3403 clear_pending (EV_A_ (W)w); 4324 clear_pending (EV_A_ (W)w);
3404 if (expect_false (!ev_is_active (w))) 4325 if (expect_false (!ev_is_active (w)))
3405 return; 4326 return;
3406 4327
… …
3419} 4340}
3420#endif 4341#endif
3421 4342
3422#if EV_CHECK_ENABLE 4343#if EV_CHECK_ENABLE
3423void 4344void
3424ev_check_start (EV_P_ ev_check *w) 4345ev_check_start (EV_P_ ev_check *w) EV_THROW
3425{ 4346{
3426 if (expect_false (ev_is_active (w))) 4347 if (expect_false (ev_is_active (w)))
3427 return; 4348 return;
3428 4349
3429 EV_FREQUENT_CHECK; 4350 EV_FREQUENT_CHECK;
… …
3434 4355
3435 EV_FREQUENT_CHECK; 4356 EV_FREQUENT_CHECK;
3436} 4357}
3437 4358
3438void 4359void
3439ev_check_stop (EV_P_ ev_check *w) 4360ev_check_stop (EV_P_ ev_check *w) EV_THROW
3440{ 4361{
3441 clear_pending (EV_A_ (W)w); 4362 clear_pending (EV_A_ (W)w);
3442 if (expect_false (!ev_is_active (w))) 4363 if (expect_false (!ev_is_active (w)))
3443 return; 4364 return;
3444 4365
… …
3457} 4378}
3458#endif 4379#endif
3459 4380
3460#if EV_EMBED_ENABLE 4381#if EV_EMBED_ENABLE
3461void noinline 4382void noinline
3462ev_embed_sweep (EV_P_ ev_embed *w) 4383ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3463{ 4384{
3464 ev_run (w->other, EVRUN_NOWAIT); 4385 ev_run (w->other, EVRUN_NOWAIT);
3465} 4386}
3466 4387
3467static void 4388static void
… …
3515 ev_idle_stop (EV_A_ idle); 4436 ev_idle_stop (EV_A_ idle);
3516} 4437}
3517#endif 4438#endif
3518 4439
3519void 4440void
3520ev_embed_start (EV_P_ ev_embed *w) 4441ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3521{ 4442{
3522 if (expect_false (ev_is_active (w))) 4443 if (expect_false (ev_is_active (w)))
3523 return; 4444 return;
3524 4445
3525 { 4446 {
… …
3546 4467
3547 EV_FREQUENT_CHECK; 4468 EV_FREQUENT_CHECK;
3548} 4469}
3549 4470
3550void 4471void
3551ev_embed_stop (EV_P_ ev_embed *w) 4472ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3552{ 4473{
3553 clear_pending (EV_A_ (W)w); 4474 clear_pending (EV_A_ (W)w);
3554 if (expect_false (!ev_is_active (w))) 4475 if (expect_false (!ev_is_active (w)))
3555 return; 4476 return;
3556 4477
… …
3566} 4487}
3567#endif 4488#endif
3568 4489
3569#if EV_FORK_ENABLE 4490#if EV_FORK_ENABLE
3570void 4491void
3571ev_fork_start (EV_P_ ev_fork *w) 4492ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3572{ 4493{
3573 if (expect_false (ev_is_active (w))) 4494 if (expect_false (ev_is_active (w)))
3574 return; 4495 return;
3575 4496
3576 EV_FREQUENT_CHECK; 4497 EV_FREQUENT_CHECK;
… …
3581 4502
3582 EV_FREQUENT_CHECK; 4503 EV_FREQUENT_CHECK;
3583} 4504}
3584 4505
3585void 4506void
3586ev_fork_stop (EV_P_ ev_fork *w) 4507ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3587{ 4508{
3588 clear_pending (EV_A_ (W)w); 4509 clear_pending (EV_A_ (W)w);
3589 if (expect_false (!ev_is_active (w))) 4510 if (expect_false (!ev_is_active (w)))
3590 return; 4511 return;
3591 4512
… …
3604} 4525}
3605#endif 4526#endif
3606 4527
3607#if EV_CLEANUP_ENABLE 4528#if EV_CLEANUP_ENABLE
3608void 4529void
3609ev_cleanup_start (EV_P_ ev_cleanup *w) 4530ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3610{ 4531{
3611 if (expect_false (ev_is_active (w))) 4532 if (expect_false (ev_is_active (w)))
3612 return; 4533 return;
3613 4534
3614 EV_FREQUENT_CHECK; 4535 EV_FREQUENT_CHECK;
… …
3621 ev_unref (EV_A); 4542 ev_unref (EV_A);
3622 EV_FREQUENT_CHECK; 4543 EV_FREQUENT_CHECK;
3623} 4544}
3624 4545
3625void 4546void
3626ev_cleanup_stop (EV_P_ ev_cleanup *w) 4547ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3627{ 4548{
3628 clear_pending (EV_A_ (W)w); 4549 clear_pending (EV_A_ (W)w);
3629 if (expect_false (!ev_is_active (w))) 4550 if (expect_false (!ev_is_active (w)))
3630 return; 4551 return;
3631 4552
… …
3645} 4566}
3646#endif 4567#endif
3647 4568
3648#if EV_ASYNC_ENABLE 4569#if EV_ASYNC_ENABLE
3649void 4570void
3650ev_async_start (EV_P_ ev_async *w) 4571ev_async_start (EV_P_ ev_async *w) EV_THROW
3651{ 4572{
3652 if (expect_false (ev_is_active (w))) 4573 if (expect_false (ev_is_active (w)))
3653 return; 4574 return;
3654 4575
3655 w->sent = 0; 4576 w->sent = 0;
… …
3664 4585
3665 EV_FREQUENT_CHECK; 4586 EV_FREQUENT_CHECK;
3666} 4587}
3667 4588
3668void 4589void
3669ev_async_stop (EV_P_ ev_async *w) 4590ev_async_stop (EV_P_ ev_async *w) EV_THROW
3670{ 4591{
3671 clear_pending (EV_A_ (W)w); 4592 clear_pending (EV_A_ (W)w);
3672 if (expect_false (!ev_is_active (w))) 4593 if (expect_false (!ev_is_active (w)))
3673 return; 4594 return;
3674 4595
… …
3685 4606
3686 EV_FREQUENT_CHECK; 4607 EV_FREQUENT_CHECK;
3687} 4608}
3688 4609
3689void 4610void
3690ev_async_send (EV_P_ ev_async *w) 4611ev_async_send (EV_P_ ev_async *w) EV_THROW
3691{ 4612{
3692 w->sent = 1; 4613 w->sent = 1;
3693 evpipe_write (EV_A_ &async_pending); 4614 evpipe_write (EV_A_ &async_pending);
3694} 4615}
3695#endif 4616#endif
… …
3732 4653
3733 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4654 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3734} 4655}
3735 4656
3736void 4657void
3737ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4658ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3738{ 4659{
3739 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4660 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3740 4661
3741 if (expect_false (!once)) 4662 if (expect_false (!once))
3742 { 4663 {
… …
3763} 4684}
3764 4685
3765/*****************************************************************************/ 4686/*****************************************************************************/
3766 4687
3767#if EV_WALK_ENABLE 4688#if EV_WALK_ENABLE
3768void 4689void ecb_cold
3769ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4690ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3770{ 4691{
3771 int i, j; 4692 int i, j;
3772 ev_watcher_list *wl, *wn; 4693 ev_watcher_list *wl, *wn;
3773 4694
3774 if (types & (EV_IO | EV_EMBED)) 4695 if (types & (EV_IO | EV_EMBED))
… …
3817 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4738 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3818#endif 4739#endif
3819 4740
3820#if EV_IDLE_ENABLE 4741#if EV_IDLE_ENABLE
3821 if (types & EV_IDLE) 4742 if (types & EV_IDLE)
3822 for (j = NUMPRI; i--; ) 4743 for (j = NUMPRI; j--; )
3823 for (i = idlecnt [j]; i--; ) 4744 for (i = idlecnt [j]; i--; )
3824 cb (EV_A_ EV_IDLE, idles [j][i]); 4745 cb (EV_A_ EV_IDLE, idles [j][i]);
3825#endif 4746#endif
3826 4747
3827#if EV_FORK_ENABLE 4748#if EV_FORK_ENABLE
… …
3880 4801
3881#if EV_MULTIPLICITY 4802#if EV_MULTIPLICITY
3882 #include "ev_wrap.h" 4803 #include "ev_wrap.h"
3883#endif 4804#endif
3884 4805
3885EV_CPP(})
3886

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