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Comparing libev/ev.c (file contents):
Revision 1.357 by root, Sat Oct 23 22:25:44 2010 UTC vs.
Revision 1.450 by root, Mon Oct 8 15:43:35 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 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
… …
341#endif 360#endif
342 361
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 362/* 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. */ 363/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 364#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 365# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 366# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 368# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 369# define EV_USE_MONOTONIC 1
351# else 370# else
… …
376# undef EV_USE_INOTIFY 395# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 396# define EV_USE_INOTIFY 0
378#endif 397#endif
379 398
380#if !EV_USE_NANOSLEEP 399#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 402# include <sys/select.h>
383# endif 403# endif
384#endif 404#endif
385 405
386#if EV_USE_INOTIFY 406#if EV_USE_INOTIFY
… …
389/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
390# ifndef IN_DONT_FOLLOW 410# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
393# endif 413# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif 414#endif
399 415
400#if EV_USE_EVENTFD 416#if EV_USE_EVENTFD
401/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
402# include <stdint.h> 418# include <stdint.h>
… …
442#else 458#else
443# define EV_FREQUENT_CHECK do { } while (0) 459# define EV_FREQUENT_CHECK do { } while (0)
444#endif 460#endif
445 461
446/* 462/*
447 * This is used to avoid floating point rounding problems. 463 * 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. 464 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */ 465 */
454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
455 468
456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#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) */ 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
458 471
459#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 472#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) 473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
461 474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010002
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
462#if __GNUC__ >= 4 519 #if __GNUC__
463# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
464# define noinline __attribute__ ((noinline)) 521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
526 #ifdef _WIN64
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
530 #else
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
534 #endif
465#else 535#else
466# define expect(expr,value) (expr) 536 #include <inttypes.h>
467# define noinline 537 #if UINTMAX_MAX > 0xffffffffU
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 538 #define ECB_PTRSIZE 8
469# define inline 539 #else
540 #define ECB_PTRSIZE 4
541 #endif
470# endif 542#endif
543
544/* many compilers define _GNUC_ to some versions but then only implement
545 * what their idiot authors think are the "more important" extensions,
546 * causing enormous grief in return for some better fake benchmark numbers.
547 * or so.
548 * we try to detect these and simply assume they are not gcc - if they have
549 * an issue with that they should have done it right in the first place.
550 */
551#ifndef ECB_GCC_VERSION
552 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
553 #define ECB_GCC_VERSION(major,minor) 0
554 #else
555 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
471#endif 556 #endif
557#endif
472 558
559#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
560#define ECB_C99 (__STDC_VERSION__ >= 199901L)
561#define ECB_C11 (__STDC_VERSION__ >= 201112L)
562#define ECB_CPP (__cplusplus+0)
563#define ECB_CPP11 (__cplusplus >= 201103L)
564
565#if ECB_CPP
566 #define ECB_EXTERN_C extern "C"
567 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
568 #define ECB_EXTERN_C_END }
569#else
570 #define ECB_EXTERN_C extern
571 #define ECB_EXTERN_C_BEG
572 #define ECB_EXTERN_C_END
573#endif
574
575/*****************************************************************************/
576
577/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
578/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
579
580#if ECB_NO_THREADS
581 #define ECB_NO_SMP 1
582#endif
583
584#if ECB_NO_SMP
585 #define ECB_MEMORY_FENCE do { } while (0)
586#endif
587
588#ifndef ECB_MEMORY_FENCE
589 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
590 #if __i386 || __i386__
591 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
592 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
593 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
594 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
595 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
596 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
597 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
598 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
599 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
600 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
601 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
603 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
604 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
606 #elif __sparc || __sparc__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
608 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
610 #elif defined __s390__ || defined __s390x__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
612 #elif defined __mips__
613 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
614 #elif defined __alpha__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
616 #elif defined __hppa__
617 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
618 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
619 #elif defined __ia64__
620 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
621 #endif
622 #endif
623#endif
624
625#ifndef ECB_MEMORY_FENCE
626 #if ECB_GCC_VERSION(4,7)
627 /* see comment below (stdatomic.h) about the C11 memory model. */
628 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
629
630 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
631 * without risking compile time errors with other compilers. We *could*
632 * define our own ecb_clang_has_feature, but I just can't be bothered to work
633 * around this shit time and again.
634 * #elif defined __clang && __has_feature (cxx_atomic)
635 * // see comment below (stdatomic.h) about the C11 memory model.
636 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
637 */
638
639 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
640 #define ECB_MEMORY_FENCE __sync_synchronize ()
641 #elif _MSC_VER >= 1400 /* VC++ 2005 */
642 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
643 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
644 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
645 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
646 #elif defined _WIN32
647 #include <WinNT.h>
648 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
649 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
650 #include <mbarrier.h>
651 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
652 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
653 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
654 #elif __xlC__
655 #define ECB_MEMORY_FENCE __sync ()
656 #endif
657#endif
658
659#ifndef ECB_MEMORY_FENCE
660 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
661 /* we assume that these memory fences work on all variables/all memory accesses, */
662 /* not just C11 atomics and atomic accesses */
663 #include <stdatomic.h>
664 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
665 /* any fence other than seq_cst, which isn't very efficient for us. */
666 /* Why that is, we don't know - either the C11 memory model is quite useless */
667 /* for most usages, or gcc and clang have a bug */
668 /* I *currently* lean towards the latter, and inefficiently implement */
669 /* all three of ecb's fences as a seq_cst fence */
670 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
671 #endif
672#endif
673
674#ifndef ECB_MEMORY_FENCE
675 #if !ECB_AVOID_PTHREADS
676 /*
677 * if you get undefined symbol references to pthread_mutex_lock,
678 * or failure to find pthread.h, then you should implement
679 * the ECB_MEMORY_FENCE operations for your cpu/compiler
680 * OR provide pthread.h and link against the posix thread library
681 * of your system.
682 */
683 #include <pthread.h>
684 #define ECB_NEEDS_PTHREADS 1
685 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
686
687 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
688 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
689 #endif
690#endif
691
692#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
693 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
694#endif
695
696#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
697 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
698#endif
699
700/*****************************************************************************/
701
702#if __cplusplus
703 #define ecb_inline static inline
704#elif ECB_GCC_VERSION(2,5)
705 #define ecb_inline static __inline__
706#elif ECB_C99
707 #define ecb_inline static inline
708#else
709 #define ecb_inline static
710#endif
711
712#if ECB_GCC_VERSION(3,3)
713 #define ecb_restrict __restrict__
714#elif ECB_C99
715 #define ecb_restrict restrict
716#else
717 #define ecb_restrict
718#endif
719
720typedef int ecb_bool;
721
722#define ECB_CONCAT_(a, b) a ## b
723#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
724#define ECB_STRINGIFY_(a) # a
725#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
726
727#define ecb_function_ ecb_inline
728
729#if ECB_GCC_VERSION(3,1)
730 #define ecb_attribute(attrlist) __attribute__(attrlist)
731 #define ecb_is_constant(expr) __builtin_constant_p (expr)
732 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
733 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
734#else
735 #define ecb_attribute(attrlist)
736 #define ecb_is_constant(expr) 0
737 #define ecb_expect(expr,value) (expr)
738 #define ecb_prefetch(addr,rw,locality)
739#endif
740
741/* no emulation for ecb_decltype */
742#if ECB_GCC_VERSION(4,5)
743 #define ecb_decltype(x) __decltype(x)
744#elif ECB_GCC_VERSION(3,0)
745 #define ecb_decltype(x) __typeof(x)
746#endif
747
748#define ecb_noinline ecb_attribute ((__noinline__))
749#define ecb_unused ecb_attribute ((__unused__))
750#define ecb_const ecb_attribute ((__const__))
751#define ecb_pure ecb_attribute ((__pure__))
752
753#if ECB_C11
754 #define ecb_noreturn _Noreturn
755#else
756 #define ecb_noreturn ecb_attribute ((__noreturn__))
757#endif
758
759#if ECB_GCC_VERSION(4,3)
760 #define ecb_artificial ecb_attribute ((__artificial__))
761 #define ecb_hot ecb_attribute ((__hot__))
762 #define ecb_cold ecb_attribute ((__cold__))
763#else
764 #define ecb_artificial
765 #define ecb_hot
766 #define ecb_cold
767#endif
768
769/* put around conditional expressions if you are very sure that the */
770/* expression is mostly true or mostly false. note that these return */
771/* booleans, not the expression. */
473#define expect_false(expr) expect ((expr) != 0, 0) 772#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#define expect_true(expr) expect ((expr) != 0, 1) 773#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
774/* for compatibility to the rest of the world */
775#define ecb_likely(expr) ecb_expect_true (expr)
776#define ecb_unlikely(expr) ecb_expect_false (expr)
777
778/* count trailing zero bits and count # of one bits */
779#if ECB_GCC_VERSION(3,4)
780 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
781 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
782 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
783 #define ecb_ctz32(x) __builtin_ctz (x)
784 #define ecb_ctz64(x) __builtin_ctzll (x)
785 #define ecb_popcount32(x) __builtin_popcount (x)
786 /* no popcountll */
787#else
788 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
789 ecb_function_ int
790 ecb_ctz32 (uint32_t x)
791 {
792 int r = 0;
793
794 x &= ~x + 1; /* this isolates the lowest bit */
795
796#if ECB_branchless_on_i386
797 r += !!(x & 0xaaaaaaaa) << 0;
798 r += !!(x & 0xcccccccc) << 1;
799 r += !!(x & 0xf0f0f0f0) << 2;
800 r += !!(x & 0xff00ff00) << 3;
801 r += !!(x & 0xffff0000) << 4;
802#else
803 if (x & 0xaaaaaaaa) r += 1;
804 if (x & 0xcccccccc) r += 2;
805 if (x & 0xf0f0f0f0) r += 4;
806 if (x & 0xff00ff00) r += 8;
807 if (x & 0xffff0000) r += 16;
808#endif
809
810 return r;
811 }
812
813 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
814 ecb_function_ int
815 ecb_ctz64 (uint64_t x)
816 {
817 int shift = x & 0xffffffffU ? 0 : 32;
818 return ecb_ctz32 (x >> shift) + shift;
819 }
820
821 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
822 ecb_function_ int
823 ecb_popcount32 (uint32_t x)
824 {
825 x -= (x >> 1) & 0x55555555;
826 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
827 x = ((x >> 4) + x) & 0x0f0f0f0f;
828 x *= 0x01010101;
829
830 return x >> 24;
831 }
832
833 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
834 ecb_function_ int ecb_ld32 (uint32_t x)
835 {
836 int r = 0;
837
838 if (x >> 16) { x >>= 16; r += 16; }
839 if (x >> 8) { x >>= 8; r += 8; }
840 if (x >> 4) { x >>= 4; r += 4; }
841 if (x >> 2) { x >>= 2; r += 2; }
842 if (x >> 1) { r += 1; }
843
844 return r;
845 }
846
847 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
848 ecb_function_ int ecb_ld64 (uint64_t x)
849 {
850 int r = 0;
851
852 if (x >> 32) { x >>= 32; r += 32; }
853
854 return r + ecb_ld32 (x);
855 }
856#endif
857
858ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
859ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
860ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
861ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
862
863ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
864ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
865{
866 return ( (x * 0x0802U & 0x22110U)
867 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
868}
869
870ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
871ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
872{
873 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
874 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
875 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
876 x = ( x >> 8 ) | ( x << 8);
877
878 return x;
879}
880
881ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
882ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
883{
884 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
885 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
886 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
887 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
888 x = ( x >> 16 ) | ( x << 16);
889
890 return x;
891}
892
893/* popcount64 is only available on 64 bit cpus as gcc builtin */
894/* so for this version we are lazy */
895ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
896ecb_function_ int
897ecb_popcount64 (uint64_t x)
898{
899 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
900}
901
902ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
903ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
904ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
905ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
906ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
907ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
908ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
909ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
910
911ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
912ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
913ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
914ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
915ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
916ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
917ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
918ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
919
920#if ECB_GCC_VERSION(4,3)
921 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
922 #define ecb_bswap32(x) __builtin_bswap32 (x)
923 #define ecb_bswap64(x) __builtin_bswap64 (x)
924#else
925 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
926 ecb_function_ uint16_t
927 ecb_bswap16 (uint16_t x)
928 {
929 return ecb_rotl16 (x, 8);
930 }
931
932 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
933 ecb_function_ uint32_t
934 ecb_bswap32 (uint32_t x)
935 {
936 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
937 }
938
939 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
940 ecb_function_ uint64_t
941 ecb_bswap64 (uint64_t x)
942 {
943 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
944 }
945#endif
946
947#if ECB_GCC_VERSION(4,5)
948 #define ecb_unreachable() __builtin_unreachable ()
949#else
950 /* this seems to work fine, but gcc always emits a warning for it :/ */
951 ecb_inline void ecb_unreachable (void) ecb_noreturn;
952 ecb_inline void ecb_unreachable (void) { }
953#endif
954
955/* try to tell the compiler that some condition is definitely true */
956#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
957
958ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
959ecb_inline unsigned char
960ecb_byteorder_helper (void)
961{
962 /* the union code still generates code under pressure in gcc, */
963 /* but less than using pointers, and always seems to */
964 /* successfully return a constant. */
965 /* the reason why we have this horrible preprocessor mess */
966 /* is to avoid it in all cases, at least on common architectures */
967 /* or when using a recent enough gcc version (>= 4.6) */
968#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
969 return 0x44;
970#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
971 return 0x44;
972#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
973 return 0x11;
974#else
975 union
976 {
977 uint32_t i;
978 uint8_t c;
979 } u = { 0x11223344 };
980 return u.c;
981#endif
982}
983
984ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
985ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
986ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
987ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
988
989#if ECB_GCC_VERSION(3,0) || ECB_C99
990 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
991#else
992 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
993#endif
994
995#if __cplusplus
996 template<typename T>
997 static inline T ecb_div_rd (T val, T div)
998 {
999 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1000 }
1001 template<typename T>
1002 static inline T ecb_div_ru (T val, T div)
1003 {
1004 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1005 }
1006#else
1007 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1008 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1009#endif
1010
1011#if ecb_cplusplus_does_not_suck
1012 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1013 template<typename T, int N>
1014 static inline int ecb_array_length (const T (&arr)[N])
1015 {
1016 return N;
1017 }
1018#else
1019 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1020#endif
1021
1022/*******************************************************************************/
1023/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1024
1025/* basically, everything uses "ieee pure-endian" floating point numbers */
1026/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1027#if 0 \
1028 || __i386 || __i386__ \
1029 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1030 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1031 || defined __arm__ && defined __ARM_EABI__ \
1032 || defined __s390__ || defined __s390x__ \
1033 || defined __mips__ \
1034 || defined __alpha__ \
1035 || defined __hppa__ \
1036 || defined __ia64__ \
1037 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1038 #define ECB_STDFP 1
1039 #include <string.h> /* for memcpy */
1040#else
1041 #define ECB_STDFP 0
1042 #include <math.h> /* for frexp*, ldexp* */
1043#endif
1044
1045#ifndef ECB_NO_LIBM
1046
1047 /* convert a float to ieee single/binary32 */
1048 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1049 ecb_function_ uint32_t
1050 ecb_float_to_binary32 (float x)
1051 {
1052 uint32_t r;
1053
1054 #if ECB_STDFP
1055 memcpy (&r, &x, 4);
1056 #else
1057 /* slow emulation, works for anything but -0 */
1058 uint32_t m;
1059 int e;
1060
1061 if (x == 0e0f ) return 0x00000000U;
1062 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1063 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1064 if (x != x ) return 0x7fbfffffU;
1065
1066 m = frexpf (x, &e) * 0x1000000U;
1067
1068 r = m & 0x80000000U;
1069
1070 if (r)
1071 m = -m;
1072
1073 if (e <= -126)
1074 {
1075 m &= 0xffffffU;
1076 m >>= (-125 - e);
1077 e = -126;
1078 }
1079
1080 r |= (e + 126) << 23;
1081 r |= m & 0x7fffffU;
1082 #endif
1083
1084 return r;
1085 }
1086
1087 /* converts an ieee single/binary32 to a float */
1088 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1089 ecb_function_ float
1090 ecb_binary32_to_float (uint32_t x)
1091 {
1092 float r;
1093
1094 #if ECB_STDFP
1095 memcpy (&r, &x, 4);
1096 #else
1097 /* emulation, only works for normals and subnormals and +0 */
1098 int neg = x >> 31;
1099 int e = (x >> 23) & 0xffU;
1100
1101 x &= 0x7fffffU;
1102
1103 if (e)
1104 x |= 0x800000U;
1105 else
1106 e = 1;
1107
1108 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1109 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1110
1111 r = neg ? -r : r;
1112 #endif
1113
1114 return r;
1115 }
1116
1117 /* convert a double to ieee double/binary64 */
1118 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1119 ecb_function_ uint64_t
1120 ecb_double_to_binary64 (double x)
1121 {
1122 uint64_t r;
1123
1124 #if ECB_STDFP
1125 memcpy (&r, &x, 8);
1126 #else
1127 /* slow emulation, works for anything but -0 */
1128 uint64_t m;
1129 int e;
1130
1131 if (x == 0e0 ) return 0x0000000000000000U;
1132 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1133 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1134 if (x != x ) return 0X7ff7ffffffffffffU;
1135
1136 m = frexp (x, &e) * 0x20000000000000U;
1137
1138 r = m & 0x8000000000000000;;
1139
1140 if (r)
1141 m = -m;
1142
1143 if (e <= -1022)
1144 {
1145 m &= 0x1fffffffffffffU;
1146 m >>= (-1021 - e);
1147 e = -1022;
1148 }
1149
1150 r |= ((uint64_t)(e + 1022)) << 52;
1151 r |= m & 0xfffffffffffffU;
1152 #endif
1153
1154 return r;
1155 }
1156
1157 /* converts an ieee double/binary64 to a double */
1158 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1159 ecb_function_ double
1160 ecb_binary64_to_double (uint64_t x)
1161 {
1162 double r;
1163
1164 #if ECB_STDFP
1165 memcpy (&r, &x, 8);
1166 #else
1167 /* emulation, only works for normals and subnormals and +0 */
1168 int neg = x >> 63;
1169 int e = (x >> 52) & 0x7ffU;
1170
1171 x &= 0xfffffffffffffU;
1172
1173 if (e)
1174 x |= 0x10000000000000U;
1175 else
1176 e = 1;
1177
1178 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1179 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1180
1181 r = neg ? -r : r;
1182 #endif
1183
1184 return r;
1185 }
1186
1187#endif
1188
1189#endif
1190
1191/* ECB.H END */
1192
1193#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1194/* if your architecture doesn't need memory fences, e.g. because it is
1195 * single-cpu/core, or if you use libev in a project that doesn't use libev
1196 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1197 * libev, in which cases the memory fences become nops.
1198 * alternatively, you can remove this #error and link against libpthread,
1199 * which will then provide the memory fences.
1200 */
1201# error "memory fences not defined for your architecture, please report"
1202#endif
1203
1204#ifndef ECB_MEMORY_FENCE
1205# define ECB_MEMORY_FENCE do { } while (0)
1206# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1207# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1208#endif
1209
1210#define expect_false(cond) ecb_expect_false (cond)
1211#define expect_true(cond) ecb_expect_true (cond)
1212#define noinline ecb_noinline
1213
475#define inline_size static inline 1214#define inline_size ecb_inline
476 1215
477#if EV_FEATURE_CODE 1216#if EV_FEATURE_CODE
478# define inline_speed static inline 1217# define inline_speed ecb_inline
479#else 1218#else
480# define inline_speed static noinline 1219# define inline_speed static noinline
481#endif 1220#endif
482 1221
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1222#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
522# include "ev_win32.c" 1261# include "ev_win32.c"
523#endif 1262#endif
524 1263
525/*****************************************************************************/ 1264/*****************************************************************************/
526 1265
1266/* define a suitable floor function (only used by periodics atm) */
1267
1268#if EV_USE_FLOOR
1269# include <math.h>
1270# define ev_floor(v) floor (v)
1271#else
1272
1273#include <float.h>
1274
1275/* a floor() replacement function, should be independent of ev_tstamp type */
1276static ev_tstamp noinline
1277ev_floor (ev_tstamp v)
1278{
1279 /* the choice of shift factor is not terribly important */
1280#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1281 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1282#else
1283 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1284#endif
1285
1286 /* argument too large for an unsigned long? */
1287 if (expect_false (v >= shift))
1288 {
1289 ev_tstamp f;
1290
1291 if (v == v - 1.)
1292 return v; /* very large number */
1293
1294 f = shift * ev_floor (v * (1. / shift));
1295 return f + ev_floor (v - f);
1296 }
1297
1298 /* special treatment for negative args? */
1299 if (expect_false (v < 0.))
1300 {
1301 ev_tstamp f = -ev_floor (-v);
1302
1303 return f - (f == v ? 0 : 1);
1304 }
1305
1306 /* fits into an unsigned long */
1307 return (unsigned long)v;
1308}
1309
1310#endif
1311
1312/*****************************************************************************/
1313
527#ifdef __linux 1314#ifdef __linux
528# include <sys/utsname.h> 1315# include <sys/utsname.h>
529#endif 1316#endif
530 1317
531static unsigned int noinline 1318static unsigned int noinline ecb_cold
532ev_linux_version (void) 1319ev_linux_version (void)
533{ 1320{
534#ifdef __linux 1321#ifdef __linux
1322 unsigned int v = 0;
535 struct utsname buf; 1323 struct utsname buf;
536 unsigned int v;
537 int i; 1324 int i;
538 char *p = buf.release; 1325 char *p = buf.release;
539 1326
540 if (uname (&buf)) 1327 if (uname (&buf))
541 return 0; 1328 return 0;
… …
565} 1352}
566 1353
567/*****************************************************************************/ 1354/*****************************************************************************/
568 1355
569#if EV_AVOID_STDIO 1356#if EV_AVOID_STDIO
570static void noinline 1357static void noinline ecb_cold
571ev_printerr (const char *msg) 1358ev_printerr (const char *msg)
572{ 1359{
573 write (STDERR_FILENO, msg, strlen (msg)); 1360 write (STDERR_FILENO, msg, strlen (msg));
574} 1361}
575#endif 1362#endif
576 1363
577static void (*syserr_cb)(const char *msg); 1364static void (*syserr_cb)(const char *msg) EV_THROW;
578 1365
579void 1366void ecb_cold
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1367ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
581{ 1368{
582 syserr_cb = cb; 1369 syserr_cb = cb;
583} 1370}
584 1371
585static void noinline 1372static void noinline ecb_cold
586ev_syserr (const char *msg) 1373ev_syserr (const char *msg)
587{ 1374{
588 if (!msg) 1375 if (!msg)
589 msg = "(libev) system error"; 1376 msg = "(libev) system error";
590 1377
591 if (syserr_cb) 1378 if (syserr_cb)
592 syserr_cb (msg); 1379 syserr_cb (msg);
593 else 1380 else
594 { 1381 {
595#if EV_AVOID_STDIO 1382#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg); 1383 ev_printerr (msg);
599 ev_printerr (": "); 1384 ev_printerr (": ");
600 ev_printerr (err); 1385 ev_printerr (strerror (errno));
601 ev_printerr ("\n"); 1386 ev_printerr ("\n");
602#else 1387#else
603 perror (msg); 1388 perror (msg);
604#endif 1389#endif
605 abort (); 1390 abort ();
606 } 1391 }
607} 1392}
608 1393
609static void * 1394static void *
610ev_realloc_emul (void *ptr, long size) 1395ev_realloc_emul (void *ptr, long size) EV_THROW
611{ 1396{
612#if __GLIBC__
613 return realloc (ptr, size);
614#else
615 /* some systems, notably openbsd and darwin, fail to properly 1397 /* some systems, notably openbsd and darwin, fail to properly
616 * implement realloc (x, 0) (as required by both ansi c-89 and 1398 * implement realloc (x, 0) (as required by both ansi c-89 and
617 * the single unix specification, so work around them here. 1399 * the single unix specification, so work around them here.
1400 * recently, also (at least) fedora and debian started breaking it,
1401 * despite documenting it otherwise.
618 */ 1402 */
619 1403
620 if (size) 1404 if (size)
621 return realloc (ptr, size); 1405 return realloc (ptr, size);
622 1406
623 free (ptr); 1407 free (ptr);
624 return 0; 1408 return 0;
625#endif
626} 1409}
627 1410
628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1411static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
629 1412
630void 1413void ecb_cold
631ev_set_allocator (void *(*cb)(void *ptr, long size)) 1414ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
632{ 1415{
633 alloc = cb; 1416 alloc = cb;
634} 1417}
635 1418
636inline_speed void * 1419inline_speed void *
… …
639 ptr = alloc (ptr, size); 1422 ptr = alloc (ptr, size);
640 1423
641 if (!ptr && size) 1424 if (!ptr && size)
642 { 1425 {
643#if EV_AVOID_STDIO 1426#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1427 ev_printerr ("(libev) memory allocation failed, aborting.\n");
645#else 1428#else
646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1429 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647#endif 1430#endif
648 abort (); 1431 abort ();
649 } 1432 }
650 1433
651 return ptr; 1434 return ptr;
… …
724 #undef VAR 1507 #undef VAR
725 }; 1508 };
726 #include "ev_wrap.h" 1509 #include "ev_wrap.h"
727 1510
728 static struct ev_loop default_loop_struct; 1511 static struct ev_loop default_loop_struct;
729 struct ev_loop *ev_default_loop_ptr; 1512 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
730 1513
731#else 1514#else
732 1515
733 ev_tstamp ev_rt_now; 1516 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
734 #define VAR(name,decl) static decl; 1517 #define VAR(name,decl) static decl;
735 #include "ev_vars.h" 1518 #include "ev_vars.h"
736 #undef VAR 1519 #undef VAR
737 1520
738 static int ev_default_loop_ptr; 1521 static int ev_default_loop_ptr;
… …
753 1536
754/*****************************************************************************/ 1537/*****************************************************************************/
755 1538
756#ifndef EV_HAVE_EV_TIME 1539#ifndef EV_HAVE_EV_TIME
757ev_tstamp 1540ev_tstamp
758ev_time (void) 1541ev_time (void) EV_THROW
759{ 1542{
760#if EV_USE_REALTIME 1543#if EV_USE_REALTIME
761 if (expect_true (have_realtime)) 1544 if (expect_true (have_realtime))
762 { 1545 {
763 struct timespec ts; 1546 struct timespec ts;
… …
787 return ev_time (); 1570 return ev_time ();
788} 1571}
789 1572
790#if EV_MULTIPLICITY 1573#if EV_MULTIPLICITY
791ev_tstamp 1574ev_tstamp
792ev_now (EV_P) 1575ev_now (EV_P) EV_THROW
793{ 1576{
794 return ev_rt_now; 1577 return ev_rt_now;
795} 1578}
796#endif 1579#endif
797 1580
798void 1581void
799ev_sleep (ev_tstamp delay) 1582ev_sleep (ev_tstamp delay) EV_THROW
800{ 1583{
801 if (delay > 0.) 1584 if (delay > 0.)
802 { 1585 {
803#if EV_USE_NANOSLEEP 1586#if EV_USE_NANOSLEEP
804 struct timespec ts; 1587 struct timespec ts;
805 1588
806 EV_TS_SET (ts, delay); 1589 EV_TS_SET (ts, delay);
807 nanosleep (&ts, 0); 1590 nanosleep (&ts, 0);
808#elif defined(_WIN32) 1591#elif defined _WIN32
809 Sleep ((unsigned long)(delay * 1e3)); 1592 Sleep ((unsigned long)(delay * 1e3));
810#else 1593#else
811 struct timeval tv; 1594 struct timeval tv;
812 1595
813 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1596 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
832 1615
833 do 1616 do
834 ncur <<= 1; 1617 ncur <<= 1;
835 while (cnt > ncur); 1618 while (cnt > ncur);
836 1619
837 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1620 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
838 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1621 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
839 { 1622 {
840 ncur *= elem; 1623 ncur *= elem;
841 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1624 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
842 ncur = ncur - sizeof (void *) * 4; 1625 ncur = ncur - sizeof (void *) * 4;
… …
844 } 1627 }
845 1628
846 return ncur; 1629 return ncur;
847} 1630}
848 1631
849static noinline void * 1632static void * noinline ecb_cold
850array_realloc (int elem, void *base, int *cur, int cnt) 1633array_realloc (int elem, void *base, int *cur, int cnt)
851{ 1634{
852 *cur = array_nextsize (elem, *cur, cnt); 1635 *cur = array_nextsize (elem, *cur, cnt);
853 return ev_realloc (base, elem * *cur); 1636 return ev_realloc (base, elem * *cur);
854} 1637}
… …
857 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1640 memset ((void *)(base), 0, sizeof (*(base)) * (count))
858 1641
859#define array_needsize(type,base,cur,cnt,init) \ 1642#define array_needsize(type,base,cur,cnt,init) \
860 if (expect_false ((cnt) > (cur))) \ 1643 if (expect_false ((cnt) > (cur))) \
861 { \ 1644 { \
862 int ocur_ = (cur); \ 1645 int ecb_unused ocur_ = (cur); \
863 (base) = (type *)array_realloc \ 1646 (base) = (type *)array_realloc \
864 (sizeof (type), (base), &(cur), (cnt)); \ 1647 (sizeof (type), (base), &(cur), (cnt)); \
865 init ((base) + (ocur_), (cur) - ocur_); \ 1648 init ((base) + (ocur_), (cur) - ocur_); \
866 } 1649 }
867 1650
… …
885pendingcb (EV_P_ ev_prepare *w, int revents) 1668pendingcb (EV_P_ ev_prepare *w, int revents)
886{ 1669{
887} 1670}
888 1671
889void noinline 1672void noinline
890ev_feed_event (EV_P_ void *w, int revents) 1673ev_feed_event (EV_P_ void *w, int revents) EV_THROW
891{ 1674{
892 W w_ = (W)w; 1675 W w_ = (W)w;
893 int pri = ABSPRI (w_); 1676 int pri = ABSPRI (w_);
894 1677
895 if (expect_false (w_->pending)) 1678 if (expect_false (w_->pending))
… …
899 w_->pending = ++pendingcnt [pri]; 1682 w_->pending = ++pendingcnt [pri];
900 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1683 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
901 pendings [pri][w_->pending - 1].w = w_; 1684 pendings [pri][w_->pending - 1].w = w_;
902 pendings [pri][w_->pending - 1].events = revents; 1685 pendings [pri][w_->pending - 1].events = revents;
903 } 1686 }
1687
1688 pendingpri = NUMPRI - 1;
904} 1689}
905 1690
906inline_speed void 1691inline_speed void
907feed_reverse (EV_P_ W w) 1692feed_reverse (EV_P_ W w)
908{ 1693{
… …
954 if (expect_true (!anfd->reify)) 1739 if (expect_true (!anfd->reify))
955 fd_event_nocheck (EV_A_ fd, revents); 1740 fd_event_nocheck (EV_A_ fd, revents);
956} 1741}
957 1742
958void 1743void
959ev_feed_fd_event (EV_P_ int fd, int revents) 1744ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
960{ 1745{
961 if (fd >= 0 && fd < anfdmax) 1746 if (fd >= 0 && fd < anfdmax)
962 fd_event_nocheck (EV_A_ fd, revents); 1747 fd_event_nocheck (EV_A_ fd, revents);
963} 1748}
964 1749
… …
967inline_size void 1752inline_size void
968fd_reify (EV_P) 1753fd_reify (EV_P)
969{ 1754{
970 int i; 1755 int i;
971 1756
1757#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1758 for (i = 0; i < fdchangecnt; ++i)
1759 {
1760 int fd = fdchanges [i];
1761 ANFD *anfd = anfds + fd;
1762
1763 if (anfd->reify & EV__IOFDSET && anfd->head)
1764 {
1765 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1766
1767 if (handle != anfd->handle)
1768 {
1769 unsigned long arg;
1770
1771 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1772
1773 /* handle changed, but fd didn't - we need to do it in two steps */
1774 backend_modify (EV_A_ fd, anfd->events, 0);
1775 anfd->events = 0;
1776 anfd->handle = handle;
1777 }
1778 }
1779 }
1780#endif
1781
972 for (i = 0; i < fdchangecnt; ++i) 1782 for (i = 0; i < fdchangecnt; ++i)
973 { 1783 {
974 int fd = fdchanges [i]; 1784 int fd = fdchanges [i];
975 ANFD *anfd = anfds + fd; 1785 ANFD *anfd = anfds + fd;
976 ev_io *w; 1786 ev_io *w;
… …
978 unsigned char o_events = anfd->events; 1788 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify; 1789 unsigned char o_reify = anfd->reify;
980 1790
981 anfd->reify = 0; 1791 anfd->reify = 0;
982 1792
983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
984 if (o_reify & EV__IOFDSET)
985 {
986 unsigned long arg;
987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
990 }
991#endif
992
993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1793 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
994 { 1794 {
995 anfd->events = 0; 1795 anfd->events = 0;
996 1796
997 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1797 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1022 fdchanges [fdchangecnt - 1] = fd; 1822 fdchanges [fdchangecnt - 1] = fd;
1023 } 1823 }
1024} 1824}
1025 1825
1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1826/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void 1827inline_speed void ecb_cold
1028fd_kill (EV_P_ int fd) 1828fd_kill (EV_P_ int fd)
1029{ 1829{
1030 ev_io *w; 1830 ev_io *w;
1031 1831
1032 while ((w = (ev_io *)anfds [fd].head)) 1832 while ((w = (ev_io *)anfds [fd].head))
… …
1035 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1835 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1036 } 1836 }
1037} 1837}
1038 1838
1039/* check whether the given fd is actually valid, for error recovery */ 1839/* check whether the given fd is actually valid, for error recovery */
1040inline_size int 1840inline_size int ecb_cold
1041fd_valid (int fd) 1841fd_valid (int fd)
1042{ 1842{
1043#ifdef _WIN32 1843#ifdef _WIN32
1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1844 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1045#else 1845#else
1046 return fcntl (fd, F_GETFD) != -1; 1846 return fcntl (fd, F_GETFD) != -1;
1047#endif 1847#endif
1048} 1848}
1049 1849
1050/* called on EBADF to verify fds */ 1850/* called on EBADF to verify fds */
1051static void noinline 1851static void noinline ecb_cold
1052fd_ebadf (EV_P) 1852fd_ebadf (EV_P)
1053{ 1853{
1054 int fd; 1854 int fd;
1055 1855
1056 for (fd = 0; fd < anfdmax; ++fd) 1856 for (fd = 0; fd < anfdmax; ++fd)
… …
1058 if (!fd_valid (fd) && errno == EBADF) 1858 if (!fd_valid (fd) && errno == EBADF)
1059 fd_kill (EV_A_ fd); 1859 fd_kill (EV_A_ fd);
1060} 1860}
1061 1861
1062/* called on ENOMEM in select/poll to kill some fds and retry */ 1862/* called on ENOMEM in select/poll to kill some fds and retry */
1063static void noinline 1863static void noinline ecb_cold
1064fd_enomem (EV_P) 1864fd_enomem (EV_P)
1065{ 1865{
1066 int fd; 1866 int fd;
1067 1867
1068 for (fd = anfdmax; fd--; ) 1868 for (fd = anfdmax; fd--; )
… …
1263 2063
1264/*****************************************************************************/ 2064/*****************************************************************************/
1265 2065
1266#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2066#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1267 2067
1268static void noinline 2068static void noinline ecb_cold
1269evpipe_init (EV_P) 2069evpipe_init (EV_P)
1270{ 2070{
1271 if (!ev_is_active (&pipe_w)) 2071 if (!ev_is_active (&pipe_w))
1272 { 2072 {
2073 int fds [2];
2074
1273# if EV_USE_EVENTFD 2075# if EV_USE_EVENTFD
2076 fds [0] = -1;
1274 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2077 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1275 if (evfd < 0 && errno == EINVAL) 2078 if (fds [1] < 0 && errno == EINVAL)
1276 evfd = eventfd (0, 0); 2079 fds [1] = eventfd (0, 0);
1277 2080
1278 if (evfd >= 0) 2081 if (fds [1] < 0)
2082# endif
1279 { 2083 {
2084 while (pipe (fds))
2085 ev_syserr ("(libev) error creating signal/async pipe");
2086
2087 fd_intern (fds [0]);
2088 }
2089
2090 fd_intern (fds [1]);
2091
1280 evpipe [0] = -1; 2092 evpipe [0] = fds [0];
1281 fd_intern (evfd); /* doing it twice doesn't hurt */ 2093
1282 ev_io_set (&pipe_w, evfd, EV_READ); 2094 if (evpipe [1] < 0)
2095 evpipe [1] = fds [1]; /* first call, set write fd */
2096 else
2097 {
2098 /* on subsequent calls, do not change evpipe [1] */
2099 /* so that evpipe_write can always rely on its value. */
2100 /* this branch does not do anything sensible on windows, */
2101 /* so must not be executed on windows */
2102
2103 dup2 (fds [1], evpipe [1]);
2104 close (fds [1]);
2105 }
2106
2107 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2108 ev_io_start (EV_A_ &pipe_w);
2109 ev_unref (EV_A); /* watcher should not keep loop alive */
2110 }
2111}
2112
2113inline_speed void
2114evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2115{
2116 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2117
2118 if (expect_true (*flag))
2119 return;
2120
2121 *flag = 1;
2122 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2123
2124 pipe_write_skipped = 1;
2125
2126 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2127
2128 if (pipe_write_wanted)
2129 {
2130 int old_errno;
2131
2132 pipe_write_skipped = 0;
2133 ECB_MEMORY_FENCE_RELEASE;
2134
2135 old_errno = errno; /* save errno because write will clobber it */
2136
2137#if EV_USE_EVENTFD
2138 if (evpipe [0] < 0)
2139 {
2140 uint64_t counter = 1;
2141 write (evpipe [1], &counter, sizeof (uint64_t));
1283 } 2142 }
1284 else 2143 else
1285# endif 2144#endif
1286 { 2145 {
1287 while (pipe (evpipe)) 2146#ifdef _WIN32
1288 ev_syserr ("(libev) error creating signal/async pipe"); 2147 WSABUF buf;
1289 2148 DWORD sent;
1290 fd_intern (evpipe [0]); 2149 buf.buf = &buf;
1291 fd_intern (evpipe [1]); 2150 buf.len = 1;
1292 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2151 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2152#else
2153 write (evpipe [1], &(evpipe [1]), 1);
2154#endif
1293 } 2155 }
1294
1295 ev_io_start (EV_A_ &pipe_w);
1296 ev_unref (EV_A); /* watcher should not keep loop alive */
1297 }
1298}
1299
1300inline_size void
1301evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302{
1303 if (!*flag)
1304 {
1305 int old_errno = errno; /* save errno because write might clobber it */
1306 char dummy;
1307
1308 *flag = 1;
1309
1310#if EV_USE_EVENTFD
1311 if (evfd >= 0)
1312 {
1313 uint64_t counter = 1;
1314 write (evfd, &counter, sizeof (uint64_t));
1315 }
1316 else
1317#endif
1318 /* win32 people keep sending patches that change this write() to send() */
1319 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320 /* so when you think this write should be a send instead, please find out */
1321 /* where your send() is from - it's definitely not the microsoft send, and */
1322 /* tell me. thank you. */
1323 write (evpipe [1], &dummy, 1);
1324 2156
1325 errno = old_errno; 2157 errno = old_errno;
1326 } 2158 }
1327} 2159}
1328 2160
… …
1331static void 2163static void
1332pipecb (EV_P_ ev_io *iow, int revents) 2164pipecb (EV_P_ ev_io *iow, int revents)
1333{ 2165{
1334 int i; 2166 int i;
1335 2167
2168 if (revents & EV_READ)
2169 {
1336#if EV_USE_EVENTFD 2170#if EV_USE_EVENTFD
1337 if (evfd >= 0) 2171 if (evpipe [0] < 0)
1338 { 2172 {
1339 uint64_t counter; 2173 uint64_t counter;
1340 read (evfd, &counter, sizeof (uint64_t)); 2174 read (evpipe [1], &counter, sizeof (uint64_t));
1341 } 2175 }
1342 else 2176 else
1343#endif 2177#endif
1344 { 2178 {
1345 char dummy; 2179 char dummy[4];
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2180#ifdef _WIN32
2181 WSABUF buf;
2182 DWORD recvd;
2183 DWORD flags = 0;
2184 buf.buf = dummy;
2185 buf.len = sizeof (dummy);
2186 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2187#else
1347 read (evpipe [0], &dummy, 1); 2188 read (evpipe [0], &dummy, sizeof (dummy));
2189#endif
2190 }
1348 } 2191 }
1349 2192
2193 pipe_write_skipped = 0;
2194
2195 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2196
2197#if EV_SIGNAL_ENABLE
1350 if (sig_pending) 2198 if (sig_pending)
1351 { 2199 {
1352 sig_pending = 0; 2200 sig_pending = 0;
2201
2202 ECB_MEMORY_FENCE;
1353 2203
1354 for (i = EV_NSIG - 1; i--; ) 2204 for (i = EV_NSIG - 1; i--; )
1355 if (expect_false (signals [i].pending)) 2205 if (expect_false (signals [i].pending))
1356 ev_feed_signal_event (EV_A_ i + 1); 2206 ev_feed_signal_event (EV_A_ i + 1);
1357 } 2207 }
2208#endif
1358 2209
1359#if EV_ASYNC_ENABLE 2210#if EV_ASYNC_ENABLE
1360 if (async_pending) 2211 if (async_pending)
1361 { 2212 {
1362 async_pending = 0; 2213 async_pending = 0;
2214
2215 ECB_MEMORY_FENCE;
1363 2216
1364 for (i = asynccnt; i--; ) 2217 for (i = asynccnt; i--; )
1365 if (asyncs [i]->sent) 2218 if (asyncs [i]->sent)
1366 { 2219 {
1367 asyncs [i]->sent = 0; 2220 asyncs [i]->sent = 0;
2221 ECB_MEMORY_FENCE_RELEASE;
1368 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2222 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1369 } 2223 }
1370 } 2224 }
1371#endif 2225#endif
1372} 2226}
1373 2227
1374/*****************************************************************************/ 2228/*****************************************************************************/
1375 2229
2230void
2231ev_feed_signal (int signum) EV_THROW
2232{
2233#if EV_MULTIPLICITY
2234 ECB_MEMORY_FENCE_ACQUIRE;
2235 EV_P = signals [signum - 1].loop;
2236
2237 if (!EV_A)
2238 return;
2239#endif
2240
2241 signals [signum - 1].pending = 1;
2242 evpipe_write (EV_A_ &sig_pending);
2243}
2244
1376static void 2245static void
1377ev_sighandler (int signum) 2246ev_sighandler (int signum)
1378{ 2247{
1379#if EV_MULTIPLICITY
1380 EV_P = signals [signum - 1].loop;
1381#endif
1382
1383#ifdef _WIN32 2248#ifdef _WIN32
1384 signal (signum, ev_sighandler); 2249 signal (signum, ev_sighandler);
1385#endif 2250#endif
1386 2251
1387 signals [signum - 1].pending = 1; 2252 ev_feed_signal (signum);
1388 evpipe_write (EV_A_ &sig_pending);
1389} 2253}
1390 2254
1391void noinline 2255void noinline
1392ev_feed_signal_event (EV_P_ int signum) 2256ev_feed_signal_event (EV_P_ int signum) EV_THROW
1393{ 2257{
1394 WL w; 2258 WL w;
1395 2259
1396 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2260 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1397 return; 2261 return;
1398 2262
1399 --signum; 2263 --signum;
1400 2264
1401#if EV_MULTIPLICITY 2265#if EV_MULTIPLICITY
… …
1405 if (expect_false (signals [signum].loop != EV_A)) 2269 if (expect_false (signals [signum].loop != EV_A))
1406 return; 2270 return;
1407#endif 2271#endif
1408 2272
1409 signals [signum].pending = 0; 2273 signals [signum].pending = 0;
2274 ECB_MEMORY_FENCE_RELEASE;
1410 2275
1411 for (w = signals [signum].head; w; w = w->next) 2276 for (w = signals [signum].head; w; w = w->next)
1412 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2277 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1413} 2278}
1414 2279
… …
1512#endif 2377#endif
1513#if EV_USE_SELECT 2378#if EV_USE_SELECT
1514# include "ev_select.c" 2379# include "ev_select.c"
1515#endif 2380#endif
1516 2381
1517int 2382int ecb_cold
1518ev_version_major (void) 2383ev_version_major (void) EV_THROW
1519{ 2384{
1520 return EV_VERSION_MAJOR; 2385 return EV_VERSION_MAJOR;
1521} 2386}
1522 2387
1523int 2388int ecb_cold
1524ev_version_minor (void) 2389ev_version_minor (void) EV_THROW
1525{ 2390{
1526 return EV_VERSION_MINOR; 2391 return EV_VERSION_MINOR;
1527} 2392}
1528 2393
1529/* return true if we are running with elevated privileges and should ignore env variables */ 2394/* return true if we are running with elevated privileges and should ignore env variables */
1530int inline_size 2395int inline_size ecb_cold
1531enable_secure (void) 2396enable_secure (void)
1532{ 2397{
1533#ifdef _WIN32 2398#ifdef _WIN32
1534 return 0; 2399 return 0;
1535#else 2400#else
1536 return getuid () != geteuid () 2401 return getuid () != geteuid ()
1537 || getgid () != getegid (); 2402 || getgid () != getegid ();
1538#endif 2403#endif
1539} 2404}
1540 2405
1541unsigned int 2406unsigned int ecb_cold
1542ev_supported_backends (void) 2407ev_supported_backends (void) EV_THROW
1543{ 2408{
1544 unsigned int flags = 0; 2409 unsigned int flags = 0;
1545 2410
1546 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2411 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1547 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2412 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1550 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2415 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1551 2416
1552 return flags; 2417 return flags;
1553} 2418}
1554 2419
1555unsigned int 2420unsigned int ecb_cold
1556ev_recommended_backends (void) 2421ev_recommended_backends (void) EV_THROW
1557{ 2422{
1558 unsigned int flags = ev_supported_backends (); 2423 unsigned int flags = ev_supported_backends ();
1559 2424
1560#ifndef __NetBSD__ 2425#ifndef __NetBSD__
1561 /* kqueue is borked on everything but netbsd apparently */ 2426 /* kqueue is borked on everything but netbsd apparently */
… …
1572#endif 2437#endif
1573 2438
1574 return flags; 2439 return flags;
1575} 2440}
1576 2441
1577unsigned int 2442unsigned int ecb_cold
1578ev_embeddable_backends (void) 2443ev_embeddable_backends (void) EV_THROW
1579{ 2444{
1580 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2445 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1581 2446
1582 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2447 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1583 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2448 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1585 2450
1586 return flags; 2451 return flags;
1587} 2452}
1588 2453
1589unsigned int 2454unsigned int
1590ev_backend (EV_P) 2455ev_backend (EV_P) EV_THROW
1591{ 2456{
1592 return backend; 2457 return backend;
1593} 2458}
1594 2459
1595#if EV_FEATURE_API 2460#if EV_FEATURE_API
1596unsigned int 2461unsigned int
1597ev_iteration (EV_P) 2462ev_iteration (EV_P) EV_THROW
1598{ 2463{
1599 return loop_count; 2464 return loop_count;
1600} 2465}
1601 2466
1602unsigned int 2467unsigned int
1603ev_depth (EV_P) 2468ev_depth (EV_P) EV_THROW
1604{ 2469{
1605 return loop_depth; 2470 return loop_depth;
1606} 2471}
1607 2472
1608void 2473void
1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2474ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1610{ 2475{
1611 io_blocktime = interval; 2476 io_blocktime = interval;
1612} 2477}
1613 2478
1614void 2479void
1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2480ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1616{ 2481{
1617 timeout_blocktime = interval; 2482 timeout_blocktime = interval;
1618} 2483}
1619 2484
1620void 2485void
1621ev_set_userdata (EV_P_ void *data) 2486ev_set_userdata (EV_P_ void *data) EV_THROW
1622{ 2487{
1623 userdata = data; 2488 userdata = data;
1624} 2489}
1625 2490
1626void * 2491void *
1627ev_userdata (EV_P) 2492ev_userdata (EV_P) EV_THROW
1628{ 2493{
1629 return userdata; 2494 return userdata;
1630} 2495}
1631 2496
2497void
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2498ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1633{ 2499{
1634 invoke_cb = invoke_pending_cb; 2500 invoke_cb = invoke_pending_cb;
1635} 2501}
1636 2502
2503void
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2504ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1638{ 2505{
1639 release_cb = release; 2506 release_cb = release;
1640 acquire_cb = acquire; 2507 acquire_cb = acquire;
1641} 2508}
1642#endif 2509#endif
1643 2510
1644/* initialise a loop structure, must be zero-initialised */ 2511/* initialise a loop structure, must be zero-initialised */
1645static void noinline 2512static void noinline ecb_cold
1646loop_init (EV_P_ unsigned int flags) 2513loop_init (EV_P_ unsigned int flags) EV_THROW
1647{ 2514{
1648 if (!backend) 2515 if (!backend)
1649 { 2516 {
2517 origflags = flags;
2518
1650#if EV_USE_REALTIME 2519#if EV_USE_REALTIME
1651 if (!have_realtime) 2520 if (!have_realtime)
1652 { 2521 {
1653 struct timespec ts; 2522 struct timespec ts;
1654 2523
… …
1676 if (!(flags & EVFLAG_NOENV) 2545 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure () 2546 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS")) 2547 && getenv ("LIBEV_FLAGS"))
1679 flags = atoi (getenv ("LIBEV_FLAGS")); 2548 flags = atoi (getenv ("LIBEV_FLAGS"));
1680 2549
1681 ev_rt_now = ev_time (); 2550 ev_rt_now = ev_time ();
1682 mn_now = get_clock (); 2551 mn_now = get_clock ();
1683 now_floor = mn_now; 2552 now_floor = mn_now;
1684 rtmn_diff = ev_rt_now - mn_now; 2553 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API 2554#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending; 2555 invoke_cb = ev_invoke_pending;
1687#endif 2556#endif
1688 2557
1689 io_blocktime = 0.; 2558 io_blocktime = 0.;
1690 timeout_blocktime = 0.; 2559 timeout_blocktime = 0.;
1691 backend = 0; 2560 backend = 0;
1692 backend_fd = -1; 2561 backend_fd = -1;
1693 sig_pending = 0; 2562 sig_pending = 0;
1694#if EV_ASYNC_ENABLE 2563#if EV_ASYNC_ENABLE
1695 async_pending = 0; 2564 async_pending = 0;
1696#endif 2565#endif
2566 pipe_write_skipped = 0;
2567 pipe_write_wanted = 0;
2568 evpipe [0] = -1;
2569 evpipe [1] = -1;
1697#if EV_USE_INOTIFY 2570#if EV_USE_INOTIFY
1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2571 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699#endif 2572#endif
1700#if EV_USE_SIGNALFD 2573#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2574 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif 2575#endif
1703 2576
1704 if (!(flags & 0x0000ffffU)) 2577 if (!(flags & EVBACKEND_MASK))
1705 flags |= ev_recommended_backends (); 2578 flags |= ev_recommended_backends ();
1706 2579
1707#if EV_USE_IOCP 2580#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 2581 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif 2582#endif
… …
1731#endif 2604#endif
1732 } 2605 }
1733} 2606}
1734 2607
1735/* free up a loop structure */ 2608/* free up a loop structure */
1736static void noinline 2609void ecb_cold
1737loop_destroy (EV_P) 2610ev_loop_destroy (EV_P)
1738{ 2611{
1739 int i; 2612 int i;
2613
2614#if EV_MULTIPLICITY
2615 /* mimic free (0) */
2616 if (!EV_A)
2617 return;
2618#endif
2619
2620#if EV_CLEANUP_ENABLE
2621 /* queue cleanup watchers (and execute them) */
2622 if (expect_false (cleanupcnt))
2623 {
2624 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2625 EV_INVOKE_PENDING;
2626 }
2627#endif
2628
2629#if EV_CHILD_ENABLE
2630 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2631 {
2632 ev_ref (EV_A); /* child watcher */
2633 ev_signal_stop (EV_A_ &childev);
2634 }
2635#endif
1740 2636
1741 if (ev_is_active (&pipe_w)) 2637 if (ev_is_active (&pipe_w))
1742 { 2638 {
1743 /*ev_ref (EV_A);*/ 2639 /*ev_ref (EV_A);*/
1744 /*ev_io_stop (EV_A_ &pipe_w);*/ 2640 /*ev_io_stop (EV_A_ &pipe_w);*/
1745 2641
1746#if EV_USE_EVENTFD
1747 if (evfd >= 0)
1748 close (evfd);
1749#endif
1750
1751 if (evpipe [0] >= 0)
1752 {
1753 EV_WIN32_CLOSE_FD (evpipe [0]); 2642 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1754 EV_WIN32_CLOSE_FD (evpipe [1]); 2643 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1755 }
1756 } 2644 }
1757 2645
1758#if EV_USE_SIGNALFD 2646#if EV_USE_SIGNALFD
1759 if (ev_is_active (&sigfd_w)) 2647 if (ev_is_active (&sigfd_w))
1760 close (sigfd); 2648 close (sigfd);
… …
1805 array_free (periodic, EMPTY); 2693 array_free (periodic, EMPTY);
1806#endif 2694#endif
1807#if EV_FORK_ENABLE 2695#if EV_FORK_ENABLE
1808 array_free (fork, EMPTY); 2696 array_free (fork, EMPTY);
1809#endif 2697#endif
2698#if EV_CLEANUP_ENABLE
2699 array_free (cleanup, EMPTY);
2700#endif
1810 array_free (prepare, EMPTY); 2701 array_free (prepare, EMPTY);
1811 array_free (check, EMPTY); 2702 array_free (check, EMPTY);
1812#if EV_ASYNC_ENABLE 2703#if EV_ASYNC_ENABLE
1813 array_free (async, EMPTY); 2704 array_free (async, EMPTY);
1814#endif 2705#endif
1815 2706
1816 backend = 0; 2707 backend = 0;
2708
2709#if EV_MULTIPLICITY
2710 if (ev_is_default_loop (EV_A))
2711#endif
2712 ev_default_loop_ptr = 0;
2713#if EV_MULTIPLICITY
2714 else
2715 ev_free (EV_A);
2716#endif
1817} 2717}
1818 2718
1819#if EV_USE_INOTIFY 2719#if EV_USE_INOTIFY
1820inline_size void infy_fork (EV_P); 2720inline_size void infy_fork (EV_P);
1821#endif 2721#endif
… …
1834#endif 2734#endif
1835#if EV_USE_INOTIFY 2735#if EV_USE_INOTIFY
1836 infy_fork (EV_A); 2736 infy_fork (EV_A);
1837#endif 2737#endif
1838 2738
2739#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1839 if (ev_is_active (&pipe_w)) 2740 if (ev_is_active (&pipe_w))
1840 { 2741 {
1841 /* this "locks" the handlers against writing to the pipe */ 2742 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1842 /* while we modify the fd vars */
1843 sig_pending = 1;
1844#if EV_ASYNC_ENABLE
1845 async_pending = 1;
1846#endif
1847 2743
1848 ev_ref (EV_A); 2744 ev_ref (EV_A);
1849 ev_io_stop (EV_A_ &pipe_w); 2745 ev_io_stop (EV_A_ &pipe_w);
1850 2746
1851#if EV_USE_EVENTFD
1852 if (evfd >= 0)
1853 close (evfd);
1854#endif
1855
1856 if (evpipe [0] >= 0) 2747 if (evpipe [0] >= 0)
1857 {
1858 EV_WIN32_CLOSE_FD (evpipe [0]); 2748 EV_WIN32_CLOSE_FD (evpipe [0]);
1859 EV_WIN32_CLOSE_FD (evpipe [1]);
1860 }
1861 2749
1862#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1863 evpipe_init (EV_A); 2750 evpipe_init (EV_A);
1864 /* now iterate over everything, in case we missed something */ 2751 /* iterate over everything, in case we missed something before */
1865 pipecb (EV_A_ &pipe_w, EV_READ); 2752 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1866#endif
1867 } 2753 }
2754#endif
1868 2755
1869 postfork = 0; 2756 postfork = 0;
1870} 2757}
1871 2758
1872#if EV_MULTIPLICITY 2759#if EV_MULTIPLICITY
1873 2760
1874struct ev_loop * 2761struct ev_loop * ecb_cold
1875ev_loop_new (unsigned int flags) 2762ev_loop_new (unsigned int flags) EV_THROW
1876{ 2763{
1877 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2764 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1878 2765
1879 memset (EV_A, 0, sizeof (struct ev_loop)); 2766 memset (EV_A, 0, sizeof (struct ev_loop));
1880 loop_init (EV_A_ flags); 2767 loop_init (EV_A_ flags);
1881 2768
1882 if (ev_backend (EV_A)) 2769 if (ev_backend (EV_A))
1883 return EV_A; 2770 return EV_A;
1884 2771
2772 ev_free (EV_A);
1885 return 0; 2773 return 0;
1886} 2774}
1887 2775
1888void
1889ev_loop_destroy (EV_P)
1890{
1891 loop_destroy (EV_A);
1892 ev_free (loop);
1893}
1894
1895void
1896ev_loop_fork (EV_P)
1897{
1898 postfork = 1; /* must be in line with ev_default_fork */
1899}
1900#endif /* multiplicity */ 2776#endif /* multiplicity */
1901 2777
1902#if EV_VERIFY 2778#if EV_VERIFY
1903static void noinline 2779static void noinline ecb_cold
1904verify_watcher (EV_P_ W w) 2780verify_watcher (EV_P_ W w)
1905{ 2781{
1906 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2782 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1907 2783
1908 if (w->pending) 2784 if (w->pending)
1909 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2785 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1910} 2786}
1911 2787
1912static void noinline 2788static void noinline ecb_cold
1913verify_heap (EV_P_ ANHE *heap, int N) 2789verify_heap (EV_P_ ANHE *heap, int N)
1914{ 2790{
1915 int i; 2791 int i;
1916 2792
1917 for (i = HEAP0; i < N + HEAP0; ++i) 2793 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1922 2798
1923 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2799 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1924 } 2800 }
1925} 2801}
1926 2802
1927static void noinline 2803static void noinline ecb_cold
1928array_verify (EV_P_ W *ws, int cnt) 2804array_verify (EV_P_ W *ws, int cnt)
1929{ 2805{
1930 while (cnt--) 2806 while (cnt--)
1931 { 2807 {
1932 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2808 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1934 } 2810 }
1935} 2811}
1936#endif 2812#endif
1937 2813
1938#if EV_FEATURE_API 2814#if EV_FEATURE_API
1939void 2815void ecb_cold
1940ev_verify (EV_P) 2816ev_verify (EV_P) EV_THROW
1941{ 2817{
1942#if EV_VERIFY 2818#if EV_VERIFY
1943 int i; 2819 int i;
1944 WL w; 2820 WL w, w2;
1945 2821
1946 assert (activecnt >= -1); 2822 assert (activecnt >= -1);
1947 2823
1948 assert (fdchangemax >= fdchangecnt); 2824 assert (fdchangemax >= fdchangecnt);
1949 for (i = 0; i < fdchangecnt; ++i) 2825 for (i = 0; i < fdchangecnt; ++i)
1950 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2826 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1951 2827
1952 assert (anfdmax >= 0); 2828 assert (anfdmax >= 0);
1953 for (i = 0; i < anfdmax; ++i) 2829 for (i = 0; i < anfdmax; ++i)
2830 {
2831 int j = 0;
2832
1954 for (w = anfds [i].head; w; w = w->next) 2833 for (w = w2 = anfds [i].head; w; w = w->next)
1955 { 2834 {
1956 verify_watcher (EV_A_ (W)w); 2835 verify_watcher (EV_A_ (W)w);
2836
2837 if (j++ & 1)
2838 {
2839 assert (("libev: io watcher list contains a loop", w != w2));
2840 w2 = w2->next;
2841 }
2842
1957 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2843 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1958 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2844 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1959 } 2845 }
2846 }
1960 2847
1961 assert (timermax >= timercnt); 2848 assert (timermax >= timercnt);
1962 verify_heap (EV_A_ timers, timercnt); 2849 verify_heap (EV_A_ timers, timercnt);
1963 2850
1964#if EV_PERIODIC_ENABLE 2851#if EV_PERIODIC_ENABLE
… …
1979#if EV_FORK_ENABLE 2866#if EV_FORK_ENABLE
1980 assert (forkmax >= forkcnt); 2867 assert (forkmax >= forkcnt);
1981 array_verify (EV_A_ (W *)forks, forkcnt); 2868 array_verify (EV_A_ (W *)forks, forkcnt);
1982#endif 2869#endif
1983 2870
2871#if EV_CLEANUP_ENABLE
2872 assert (cleanupmax >= cleanupcnt);
2873 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2874#endif
2875
1984#if EV_ASYNC_ENABLE 2876#if EV_ASYNC_ENABLE
1985 assert (asyncmax >= asynccnt); 2877 assert (asyncmax >= asynccnt);
1986 array_verify (EV_A_ (W *)asyncs, asynccnt); 2878 array_verify (EV_A_ (W *)asyncs, asynccnt);
1987#endif 2879#endif
1988 2880
… …
2005#endif 2897#endif
2006} 2898}
2007#endif 2899#endif
2008 2900
2009#if EV_MULTIPLICITY 2901#if EV_MULTIPLICITY
2010struct ev_loop * 2902struct ev_loop * ecb_cold
2011ev_default_loop_init (unsigned int flags)
2012#else 2903#else
2013int 2904int
2905#endif
2014ev_default_loop (unsigned int flags) 2906ev_default_loop (unsigned int flags) EV_THROW
2015#endif
2016{ 2907{
2017 if (!ev_default_loop_ptr) 2908 if (!ev_default_loop_ptr)
2018 { 2909 {
2019#if EV_MULTIPLICITY 2910#if EV_MULTIPLICITY
2020 EV_P = ev_default_loop_ptr = &default_loop_struct; 2911 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2039 2930
2040 return ev_default_loop_ptr; 2931 return ev_default_loop_ptr;
2041} 2932}
2042 2933
2043void 2934void
2044ev_default_destroy (void) 2935ev_loop_fork (EV_P) EV_THROW
2045{ 2936{
2046#if EV_MULTIPLICITY 2937 postfork = 1;
2047 EV_P = ev_default_loop_ptr;
2048#endif
2049
2050 ev_default_loop_ptr = 0;
2051
2052#if EV_CHILD_ENABLE
2053 ev_ref (EV_A); /* child watcher */
2054 ev_signal_stop (EV_A_ &childev);
2055#endif
2056
2057 loop_destroy (EV_A);
2058}
2059
2060void
2061ev_default_fork (void)
2062{
2063#if EV_MULTIPLICITY
2064 EV_P = ev_default_loop_ptr;
2065#endif
2066
2067 postfork = 1; /* must be in line with ev_loop_fork */
2068} 2938}
2069 2939
2070/*****************************************************************************/ 2940/*****************************************************************************/
2071 2941
2072void 2942void
… …
2074{ 2944{
2075 EV_CB_INVOKE ((W)w, revents); 2945 EV_CB_INVOKE ((W)w, revents);
2076} 2946}
2077 2947
2078unsigned int 2948unsigned int
2079ev_pending_count (EV_P) 2949ev_pending_count (EV_P) EV_THROW
2080{ 2950{
2081 int pri; 2951 int pri;
2082 unsigned int count = 0; 2952 unsigned int count = 0;
2083 2953
2084 for (pri = NUMPRI; pri--; ) 2954 for (pri = NUMPRI; pri--; )
… …
2088} 2958}
2089 2959
2090void noinline 2960void noinline
2091ev_invoke_pending (EV_P) 2961ev_invoke_pending (EV_P)
2092{ 2962{
2093 int pri; 2963 pendingpri = NUMPRI;
2094 2964
2095 for (pri = NUMPRI; pri--; ) 2965 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2966 {
2967 --pendingpri;
2968
2096 while (pendingcnt [pri]) 2969 while (pendingcnt [pendingpri])
2097 { 2970 {
2098 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2971 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2099 2972
2100 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2101 /* ^ this is no longer true, as pending_w could be here */
2102
2103 p->w->pending = 0; 2973 p->w->pending = 0;
2104 EV_CB_INVOKE (p->w, p->events); 2974 EV_CB_INVOKE (p->w, p->events);
2105 EV_FREQUENT_CHECK; 2975 EV_FREQUENT_CHECK;
2106 } 2976 }
2977 }
2107} 2978}
2108 2979
2109#if EV_IDLE_ENABLE 2980#if EV_IDLE_ENABLE
2110/* make idle watchers pending. this handles the "call-idle */ 2981/* make idle watchers pending. this handles the "call-idle */
2111/* only when higher priorities are idle" logic */ 2982/* only when higher priorities are idle" logic */
… …
2168 feed_reverse_done (EV_A_ EV_TIMER); 3039 feed_reverse_done (EV_A_ EV_TIMER);
2169 } 3040 }
2170} 3041}
2171 3042
2172#if EV_PERIODIC_ENABLE 3043#if EV_PERIODIC_ENABLE
3044
3045static void noinline
3046periodic_recalc (EV_P_ ev_periodic *w)
3047{
3048 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3049 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3050
3051 /* the above almost always errs on the low side */
3052 while (at <= ev_rt_now)
3053 {
3054 ev_tstamp nat = at + w->interval;
3055
3056 /* when resolution fails us, we use ev_rt_now */
3057 if (expect_false (nat == at))
3058 {
3059 at = ev_rt_now;
3060 break;
3061 }
3062
3063 at = nat;
3064 }
3065
3066 ev_at (w) = at;
3067}
3068
2173/* make periodics pending */ 3069/* make periodics pending */
2174inline_size void 3070inline_size void
2175periodics_reify (EV_P) 3071periodics_reify (EV_P)
2176{ 3072{
2177 EV_FREQUENT_CHECK; 3073 EV_FREQUENT_CHECK;
2178 3074
2179 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3075 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2180 { 3076 {
2181 int feed_count = 0;
2182
2183 do 3077 do
2184 { 3078 {
2185 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3079 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2186 3080
2187 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3081 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2196 ANHE_at_cache (periodics [HEAP0]); 3090 ANHE_at_cache (periodics [HEAP0]);
2197 downheap (periodics, periodiccnt, HEAP0); 3091 downheap (periodics, periodiccnt, HEAP0);
2198 } 3092 }
2199 else if (w->interval) 3093 else if (w->interval)
2200 { 3094 {
2201 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3095 periodic_recalc (EV_A_ w);
2202 /* if next trigger time is not sufficiently in the future, put it there */
2203 /* this might happen because of floating point inexactness */
2204 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2205 {
2206 ev_at (w) += w->interval;
2207
2208 /* if interval is unreasonably low we might still have a time in the past */
2209 /* so correct this. this will make the periodic very inexact, but the user */
2210 /* has effectively asked to get triggered more often than possible */
2211 if (ev_at (w) < ev_rt_now)
2212 ev_at (w) = ev_rt_now;
2213 }
2214
2215 ANHE_at_cache (periodics [HEAP0]); 3096 ANHE_at_cache (periodics [HEAP0]);
2216 downheap (periodics, periodiccnt, HEAP0); 3097 downheap (periodics, periodiccnt, HEAP0);
2217 } 3098 }
2218 else 3099 else
2219 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3100 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2227 } 3108 }
2228} 3109}
2229 3110
2230/* simply recalculate all periodics */ 3111/* simply recalculate all periodics */
2231/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3112/* TODO: maybe ensure that at least one event happens when jumping forward? */
2232static void noinline 3113static void noinline ecb_cold
2233periodics_reschedule (EV_P) 3114periodics_reschedule (EV_P)
2234{ 3115{
2235 int i; 3116 int i;
2236 3117
2237 /* adjust periodics after time jump */ 3118 /* adjust periodics after time jump */
… …
2240 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3121 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2241 3122
2242 if (w->reschedule_cb) 3123 if (w->reschedule_cb)
2243 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3124 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2244 else if (w->interval) 3125 else if (w->interval)
2245 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3126 periodic_recalc (EV_A_ w);
2246 3127
2247 ANHE_at_cache (periodics [i]); 3128 ANHE_at_cache (periodics [i]);
2248 } 3129 }
2249 3130
2250 reheap (periodics, periodiccnt); 3131 reheap (periodics, periodiccnt);
2251} 3132}
2252#endif 3133#endif
2253 3134
2254/* adjust all timers by a given offset */ 3135/* adjust all timers by a given offset */
2255static void noinline 3136static void noinline ecb_cold
2256timers_reschedule (EV_P_ ev_tstamp adjust) 3137timers_reschedule (EV_P_ ev_tstamp adjust)
2257{ 3138{
2258 int i; 3139 int i;
2259 3140
2260 for (i = 0; i < timercnt; ++i) 3141 for (i = 0; i < timercnt; ++i)
… …
2297 * doesn't hurt either as we only do this on time-jumps or 3178 * doesn't hurt either as we only do this on time-jumps or
2298 * in the unlikely event of having been preempted here. 3179 * in the unlikely event of having been preempted here.
2299 */ 3180 */
2300 for (i = 4; --i; ) 3181 for (i = 4; --i; )
2301 { 3182 {
3183 ev_tstamp diff;
2302 rtmn_diff = ev_rt_now - mn_now; 3184 rtmn_diff = ev_rt_now - mn_now;
2303 3185
3186 diff = odiff - rtmn_diff;
3187
2304 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3188 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2305 return; /* all is well */ 3189 return; /* all is well */
2306 3190
2307 ev_rt_now = ev_time (); 3191 ev_rt_now = ev_time ();
2308 mn_now = get_clock (); 3192 mn_now = get_clock ();
2309 now_floor = mn_now; 3193 now_floor = mn_now;
… …
2331 3215
2332 mn_now = ev_rt_now; 3216 mn_now = ev_rt_now;
2333 } 3217 }
2334} 3218}
2335 3219
2336void 3220int
2337ev_run (EV_P_ int flags) 3221ev_run (EV_P_ int flags)
2338{ 3222{
2339#if EV_FEATURE_API 3223#if EV_FEATURE_API
2340 ++loop_depth; 3224 ++loop_depth;
2341#endif 3225#endif
… …
2399 ev_tstamp prev_mn_now = mn_now; 3283 ev_tstamp prev_mn_now = mn_now;
2400 3284
2401 /* update time to cancel out callback processing overhead */ 3285 /* update time to cancel out callback processing overhead */
2402 time_update (EV_A_ 1e100); 3286 time_update (EV_A_ 1e100);
2403 3287
3288 /* from now on, we want a pipe-wake-up */
3289 pipe_write_wanted = 1;
3290
3291 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3292
2404 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3293 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2405 { 3294 {
2406 waittime = MAX_BLOCKTIME; 3295 waittime = MAX_BLOCKTIME;
2407 3296
2408 if (timercnt) 3297 if (timercnt)
2409 { 3298 {
2410 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3299 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2411 if (waittime > to) waittime = to; 3300 if (waittime > to) waittime = to;
2412 } 3301 }
2413 3302
2414#if EV_PERIODIC_ENABLE 3303#if EV_PERIODIC_ENABLE
2415 if (periodiccnt) 3304 if (periodiccnt)
2416 { 3305 {
2417 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3306 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2418 if (waittime > to) waittime = to; 3307 if (waittime > to) waittime = to;
2419 } 3308 }
2420#endif 3309#endif
2421 3310
2422 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3311 /* don't let timeouts decrease the waittime below timeout_blocktime */
2423 if (expect_false (waittime < timeout_blocktime)) 3312 if (expect_false (waittime < timeout_blocktime))
2424 waittime = timeout_blocktime; 3313 waittime = timeout_blocktime;
3314
3315 /* at this point, we NEED to wait, so we have to ensure */
3316 /* to pass a minimum nonzero value to the backend */
3317 if (expect_false (waittime < backend_mintime))
3318 waittime = backend_mintime;
2425 3319
2426 /* extra check because io_blocktime is commonly 0 */ 3320 /* extra check because io_blocktime is commonly 0 */
2427 if (expect_false (io_blocktime)) 3321 if (expect_false (io_blocktime))
2428 { 3322 {
2429 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3323 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2430 3324
2431 if (sleeptime > waittime - backend_fudge) 3325 if (sleeptime > waittime - backend_mintime)
2432 sleeptime = waittime - backend_fudge; 3326 sleeptime = waittime - backend_mintime;
2433 3327
2434 if (expect_true (sleeptime > 0.)) 3328 if (expect_true (sleeptime > 0.))
2435 { 3329 {
2436 ev_sleep (sleeptime); 3330 ev_sleep (sleeptime);
2437 waittime -= sleeptime; 3331 waittime -= sleeptime;
… …
2444#endif 3338#endif
2445 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3339 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2446 backend_poll (EV_A_ waittime); 3340 backend_poll (EV_A_ waittime);
2447 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3341 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2448 3342
3343 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3344
3345 ECB_MEMORY_FENCE_ACQUIRE;
3346 if (pipe_write_skipped)
3347 {
3348 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3349 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3350 }
3351
3352
2449 /* update ev_rt_now, do magic */ 3353 /* update ev_rt_now, do magic */
2450 time_update (EV_A_ waittime + sleeptime); 3354 time_update (EV_A_ waittime + sleeptime);
2451 } 3355 }
2452 3356
2453 /* queue pending timers and reschedule them */ 3357 /* queue pending timers and reschedule them */
… …
2479 loop_done = EVBREAK_CANCEL; 3383 loop_done = EVBREAK_CANCEL;
2480 3384
2481#if EV_FEATURE_API 3385#if EV_FEATURE_API
2482 --loop_depth; 3386 --loop_depth;
2483#endif 3387#endif
3388
3389 return activecnt;
2484} 3390}
2485 3391
2486void 3392void
2487ev_break (EV_P_ int how) 3393ev_break (EV_P_ int how) EV_THROW
2488{ 3394{
2489 loop_done = how; 3395 loop_done = how;
2490} 3396}
2491 3397
2492void 3398void
2493ev_ref (EV_P) 3399ev_ref (EV_P) EV_THROW
2494{ 3400{
2495 ++activecnt; 3401 ++activecnt;
2496} 3402}
2497 3403
2498void 3404void
2499ev_unref (EV_P) 3405ev_unref (EV_P) EV_THROW
2500{ 3406{
2501 --activecnt; 3407 --activecnt;
2502} 3408}
2503 3409
2504void 3410void
2505ev_now_update (EV_P) 3411ev_now_update (EV_P) EV_THROW
2506{ 3412{
2507 time_update (EV_A_ 1e100); 3413 time_update (EV_A_ 1e100);
2508} 3414}
2509 3415
2510void 3416void
2511ev_suspend (EV_P) 3417ev_suspend (EV_P) EV_THROW
2512{ 3418{
2513 ev_now_update (EV_A); 3419 ev_now_update (EV_A);
2514} 3420}
2515 3421
2516void 3422void
2517ev_resume (EV_P) 3423ev_resume (EV_P) EV_THROW
2518{ 3424{
2519 ev_tstamp mn_prev = mn_now; 3425 ev_tstamp mn_prev = mn_now;
2520 3426
2521 ev_now_update (EV_A); 3427 ev_now_update (EV_A);
2522 timers_reschedule (EV_A_ mn_now - mn_prev); 3428 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2561 w->pending = 0; 3467 w->pending = 0;
2562 } 3468 }
2563} 3469}
2564 3470
2565int 3471int
2566ev_clear_pending (EV_P_ void *w) 3472ev_clear_pending (EV_P_ void *w) EV_THROW
2567{ 3473{
2568 W w_ = (W)w; 3474 W w_ = (W)w;
2569 int pending = w_->pending; 3475 int pending = w_->pending;
2570 3476
2571 if (expect_true (pending)) 3477 if (expect_true (pending))
… …
2604} 3510}
2605 3511
2606/*****************************************************************************/ 3512/*****************************************************************************/
2607 3513
2608void noinline 3514void noinline
2609ev_io_start (EV_P_ ev_io *w) 3515ev_io_start (EV_P_ ev_io *w) EV_THROW
2610{ 3516{
2611 int fd = w->fd; 3517 int fd = w->fd;
2612 3518
2613 if (expect_false (ev_is_active (w))) 3519 if (expect_false (ev_is_active (w)))
2614 return; 3520 return;
… …
2620 3526
2621 ev_start (EV_A_ (W)w, 1); 3527 ev_start (EV_A_ (W)w, 1);
2622 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3528 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2623 wlist_add (&anfds[fd].head, (WL)w); 3529 wlist_add (&anfds[fd].head, (WL)w);
2624 3530
3531 /* common bug, apparently */
3532 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3533
2625 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3534 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2626 w->events &= ~EV__IOFDSET; 3535 w->events &= ~EV__IOFDSET;
2627 3536
2628 EV_FREQUENT_CHECK; 3537 EV_FREQUENT_CHECK;
2629} 3538}
2630 3539
2631void noinline 3540void noinline
2632ev_io_stop (EV_P_ ev_io *w) 3541ev_io_stop (EV_P_ ev_io *w) EV_THROW
2633{ 3542{
2634 clear_pending (EV_A_ (W)w); 3543 clear_pending (EV_A_ (W)w);
2635 if (expect_false (!ev_is_active (w))) 3544 if (expect_false (!ev_is_active (w)))
2636 return; 3545 return;
2637 3546
… …
2646 3555
2647 EV_FREQUENT_CHECK; 3556 EV_FREQUENT_CHECK;
2648} 3557}
2649 3558
2650void noinline 3559void noinline
2651ev_timer_start (EV_P_ ev_timer *w) 3560ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2652{ 3561{
2653 if (expect_false (ev_is_active (w))) 3562 if (expect_false (ev_is_active (w)))
2654 return; 3563 return;
2655 3564
2656 ev_at (w) += mn_now; 3565 ev_at (w) += mn_now;
… …
2670 3579
2671 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3580 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2672} 3581}
2673 3582
2674void noinline 3583void noinline
2675ev_timer_stop (EV_P_ ev_timer *w) 3584ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2676{ 3585{
2677 clear_pending (EV_A_ (W)w); 3586 clear_pending (EV_A_ (W)w);
2678 if (expect_false (!ev_is_active (w))) 3587 if (expect_false (!ev_is_active (w)))
2679 return; 3588 return;
2680 3589
… …
2700 3609
2701 EV_FREQUENT_CHECK; 3610 EV_FREQUENT_CHECK;
2702} 3611}
2703 3612
2704void noinline 3613void noinline
2705ev_timer_again (EV_P_ ev_timer *w) 3614ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2706{ 3615{
2707 EV_FREQUENT_CHECK; 3616 EV_FREQUENT_CHECK;
3617
3618 clear_pending (EV_A_ (W)w);
2708 3619
2709 if (ev_is_active (w)) 3620 if (ev_is_active (w))
2710 { 3621 {
2711 if (w->repeat) 3622 if (w->repeat)
2712 { 3623 {
… …
2725 3636
2726 EV_FREQUENT_CHECK; 3637 EV_FREQUENT_CHECK;
2727} 3638}
2728 3639
2729ev_tstamp 3640ev_tstamp
2730ev_timer_remaining (EV_P_ ev_timer *w) 3641ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2731{ 3642{
2732 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3643 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2733} 3644}
2734 3645
2735#if EV_PERIODIC_ENABLE 3646#if EV_PERIODIC_ENABLE
2736void noinline 3647void noinline
2737ev_periodic_start (EV_P_ ev_periodic *w) 3648ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2738{ 3649{
2739 if (expect_false (ev_is_active (w))) 3650 if (expect_false (ev_is_active (w)))
2740 return; 3651 return;
2741 3652
2742 if (w->reschedule_cb) 3653 if (w->reschedule_cb)
2743 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3654 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2744 else if (w->interval) 3655 else if (w->interval)
2745 { 3656 {
2746 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3657 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2747 /* this formula differs from the one in periodic_reify because we do not always round up */ 3658 periodic_recalc (EV_A_ w);
2748 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2749 } 3659 }
2750 else 3660 else
2751 ev_at (w) = w->offset; 3661 ev_at (w) = w->offset;
2752 3662
2753 EV_FREQUENT_CHECK; 3663 EV_FREQUENT_CHECK;
… …
2763 3673
2764 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3674 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2765} 3675}
2766 3676
2767void noinline 3677void noinline
2768ev_periodic_stop (EV_P_ ev_periodic *w) 3678ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2769{ 3679{
2770 clear_pending (EV_A_ (W)w); 3680 clear_pending (EV_A_ (W)w);
2771 if (expect_false (!ev_is_active (w))) 3681 if (expect_false (!ev_is_active (w)))
2772 return; 3682 return;
2773 3683
… …
2791 3701
2792 EV_FREQUENT_CHECK; 3702 EV_FREQUENT_CHECK;
2793} 3703}
2794 3704
2795void noinline 3705void noinline
2796ev_periodic_again (EV_P_ ev_periodic *w) 3706ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2797{ 3707{
2798 /* TODO: use adjustheap and recalculation */ 3708 /* TODO: use adjustheap and recalculation */
2799 ev_periodic_stop (EV_A_ w); 3709 ev_periodic_stop (EV_A_ w);
2800 ev_periodic_start (EV_A_ w); 3710 ev_periodic_start (EV_A_ w);
2801} 3711}
… …
2806#endif 3716#endif
2807 3717
2808#if EV_SIGNAL_ENABLE 3718#if EV_SIGNAL_ENABLE
2809 3719
2810void noinline 3720void noinline
2811ev_signal_start (EV_P_ ev_signal *w) 3721ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2812{ 3722{
2813 if (expect_false (ev_is_active (w))) 3723 if (expect_false (ev_is_active (w)))
2814 return; 3724 return;
2815 3725
2816 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3726 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2818#if EV_MULTIPLICITY 3728#if EV_MULTIPLICITY
2819 assert (("libev: a signal must not be attached to two different loops", 3729 assert (("libev: a signal must not be attached to two different loops",
2820 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3730 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2821 3731
2822 signals [w->signum - 1].loop = EV_A; 3732 signals [w->signum - 1].loop = EV_A;
3733 ECB_MEMORY_FENCE_RELEASE;
2823#endif 3734#endif
2824 3735
2825 EV_FREQUENT_CHECK; 3736 EV_FREQUENT_CHECK;
2826 3737
2827#if EV_USE_SIGNALFD 3738#if EV_USE_SIGNALFD
… …
2874 sa.sa_handler = ev_sighandler; 3785 sa.sa_handler = ev_sighandler;
2875 sigfillset (&sa.sa_mask); 3786 sigfillset (&sa.sa_mask);
2876 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3787 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2877 sigaction (w->signum, &sa, 0); 3788 sigaction (w->signum, &sa, 0);
2878 3789
3790 if (origflags & EVFLAG_NOSIGMASK)
3791 {
2879 sigemptyset (&sa.sa_mask); 3792 sigemptyset (&sa.sa_mask);
2880 sigaddset (&sa.sa_mask, w->signum); 3793 sigaddset (&sa.sa_mask, w->signum);
2881 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3794 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3795 }
2882#endif 3796#endif
2883 } 3797 }
2884 3798
2885 EV_FREQUENT_CHECK; 3799 EV_FREQUENT_CHECK;
2886} 3800}
2887 3801
2888void noinline 3802void noinline
2889ev_signal_stop (EV_P_ ev_signal *w) 3803ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2890{ 3804{
2891 clear_pending (EV_A_ (W)w); 3805 clear_pending (EV_A_ (W)w);
2892 if (expect_false (!ev_is_active (w))) 3806 if (expect_false (!ev_is_active (w)))
2893 return; 3807 return;
2894 3808
… …
2925#endif 3839#endif
2926 3840
2927#if EV_CHILD_ENABLE 3841#if EV_CHILD_ENABLE
2928 3842
2929void 3843void
2930ev_child_start (EV_P_ ev_child *w) 3844ev_child_start (EV_P_ ev_child *w) EV_THROW
2931{ 3845{
2932#if EV_MULTIPLICITY 3846#if EV_MULTIPLICITY
2933 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3847 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2934#endif 3848#endif
2935 if (expect_false (ev_is_active (w))) 3849 if (expect_false (ev_is_active (w)))
… …
2942 3856
2943 EV_FREQUENT_CHECK; 3857 EV_FREQUENT_CHECK;
2944} 3858}
2945 3859
2946void 3860void
2947ev_child_stop (EV_P_ ev_child *w) 3861ev_child_stop (EV_P_ ev_child *w) EV_THROW
2948{ 3862{
2949 clear_pending (EV_A_ (W)w); 3863 clear_pending (EV_A_ (W)w);
2950 if (expect_false (!ev_is_active (w))) 3864 if (expect_false (!ev_is_active (w)))
2951 return; 3865 return;
2952 3866
… …
3027 if (!pend || pend == path) 3941 if (!pend || pend == path)
3028 break; 3942 break;
3029 3943
3030 *pend = 0; 3944 *pend = 0;
3031 w->wd = inotify_add_watch (fs_fd, path, mask); 3945 w->wd = inotify_add_watch (fs_fd, path, mask);
3032 } 3946 }
3033 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3947 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3034 } 3948 }
3035 } 3949 }
3036 3950
3037 if (w->wd >= 0) 3951 if (w->wd >= 0)
… …
3104 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4018 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3105 ofs += sizeof (struct inotify_event) + ev->len; 4019 ofs += sizeof (struct inotify_event) + ev->len;
3106 } 4020 }
3107} 4021}
3108 4022
3109inline_size void 4023inline_size void ecb_cold
3110ev_check_2625 (EV_P) 4024ev_check_2625 (EV_P)
3111{ 4025{
3112 /* kernels < 2.6.25 are borked 4026 /* kernels < 2.6.25 are borked
3113 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4027 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3114 */ 4028 */
… …
3119} 4033}
3120 4034
3121inline_size int 4035inline_size int
3122infy_newfd (void) 4036infy_newfd (void)
3123{ 4037{
3124#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4038#if defined IN_CLOEXEC && defined IN_NONBLOCK
3125 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4039 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3126 if (fd >= 0) 4040 if (fd >= 0)
3127 return fd; 4041 return fd;
3128#endif 4042#endif
3129 return inotify_init (); 4043 return inotify_init ();
… …
3204#else 4118#else
3205# define EV_LSTAT(p,b) lstat (p, b) 4119# define EV_LSTAT(p,b) lstat (p, b)
3206#endif 4120#endif
3207 4121
3208void 4122void
3209ev_stat_stat (EV_P_ ev_stat *w) 4123ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3210{ 4124{
3211 if (lstat (w->path, &w->attr) < 0) 4125 if (lstat (w->path, &w->attr) < 0)
3212 w->attr.st_nlink = 0; 4126 w->attr.st_nlink = 0;
3213 else if (!w->attr.st_nlink) 4127 else if (!w->attr.st_nlink)
3214 w->attr.st_nlink = 1; 4128 w->attr.st_nlink = 1;
… …
3253 ev_feed_event (EV_A_ w, EV_STAT); 4167 ev_feed_event (EV_A_ w, EV_STAT);
3254 } 4168 }
3255} 4169}
3256 4170
3257void 4171void
3258ev_stat_start (EV_P_ ev_stat *w) 4172ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3259{ 4173{
3260 if (expect_false (ev_is_active (w))) 4174 if (expect_false (ev_is_active (w)))
3261 return; 4175 return;
3262 4176
3263 ev_stat_stat (EV_A_ w); 4177 ev_stat_stat (EV_A_ w);
… …
3284 4198
3285 EV_FREQUENT_CHECK; 4199 EV_FREQUENT_CHECK;
3286} 4200}
3287 4201
3288void 4202void
3289ev_stat_stop (EV_P_ ev_stat *w) 4203ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3290{ 4204{
3291 clear_pending (EV_A_ (W)w); 4205 clear_pending (EV_A_ (W)w);
3292 if (expect_false (!ev_is_active (w))) 4206 if (expect_false (!ev_is_active (w)))
3293 return; 4207 return;
3294 4208
… …
3310} 4224}
3311#endif 4225#endif
3312 4226
3313#if EV_IDLE_ENABLE 4227#if EV_IDLE_ENABLE
3314void 4228void
3315ev_idle_start (EV_P_ ev_idle *w) 4229ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3316{ 4230{
3317 if (expect_false (ev_is_active (w))) 4231 if (expect_false (ev_is_active (w)))
3318 return; 4232 return;
3319 4233
3320 pri_adjust (EV_A_ (W)w); 4234 pri_adjust (EV_A_ (W)w);
… …
3333 4247
3334 EV_FREQUENT_CHECK; 4248 EV_FREQUENT_CHECK;
3335} 4249}
3336 4250
3337void 4251void
3338ev_idle_stop (EV_P_ ev_idle *w) 4252ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3339{ 4253{
3340 clear_pending (EV_A_ (W)w); 4254 clear_pending (EV_A_ (W)w);
3341 if (expect_false (!ev_is_active (w))) 4255 if (expect_false (!ev_is_active (w)))
3342 return; 4256 return;
3343 4257
… …
3357} 4271}
3358#endif 4272#endif
3359 4273
3360#if EV_PREPARE_ENABLE 4274#if EV_PREPARE_ENABLE
3361void 4275void
3362ev_prepare_start (EV_P_ ev_prepare *w) 4276ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3363{ 4277{
3364 if (expect_false (ev_is_active (w))) 4278 if (expect_false (ev_is_active (w)))
3365 return; 4279 return;
3366 4280
3367 EV_FREQUENT_CHECK; 4281 EV_FREQUENT_CHECK;
… …
3372 4286
3373 EV_FREQUENT_CHECK; 4287 EV_FREQUENT_CHECK;
3374} 4288}
3375 4289
3376void 4290void
3377ev_prepare_stop (EV_P_ ev_prepare *w) 4291ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3378{ 4292{
3379 clear_pending (EV_A_ (W)w); 4293 clear_pending (EV_A_ (W)w);
3380 if (expect_false (!ev_is_active (w))) 4294 if (expect_false (!ev_is_active (w)))
3381 return; 4295 return;
3382 4296
… …
3395} 4309}
3396#endif 4310#endif
3397 4311
3398#if EV_CHECK_ENABLE 4312#if EV_CHECK_ENABLE
3399void 4313void
3400ev_check_start (EV_P_ ev_check *w) 4314ev_check_start (EV_P_ ev_check *w) EV_THROW
3401{ 4315{
3402 if (expect_false (ev_is_active (w))) 4316 if (expect_false (ev_is_active (w)))
3403 return; 4317 return;
3404 4318
3405 EV_FREQUENT_CHECK; 4319 EV_FREQUENT_CHECK;
… …
3410 4324
3411 EV_FREQUENT_CHECK; 4325 EV_FREQUENT_CHECK;
3412} 4326}
3413 4327
3414void 4328void
3415ev_check_stop (EV_P_ ev_check *w) 4329ev_check_stop (EV_P_ ev_check *w) EV_THROW
3416{ 4330{
3417 clear_pending (EV_A_ (W)w); 4331 clear_pending (EV_A_ (W)w);
3418 if (expect_false (!ev_is_active (w))) 4332 if (expect_false (!ev_is_active (w)))
3419 return; 4333 return;
3420 4334
… …
3433} 4347}
3434#endif 4348#endif
3435 4349
3436#if EV_EMBED_ENABLE 4350#if EV_EMBED_ENABLE
3437void noinline 4351void noinline
3438ev_embed_sweep (EV_P_ ev_embed *w) 4352ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3439{ 4353{
3440 ev_run (w->other, EVRUN_NOWAIT); 4354 ev_run (w->other, EVRUN_NOWAIT);
3441} 4355}
3442 4356
3443static void 4357static void
… …
3491 ev_idle_stop (EV_A_ idle); 4405 ev_idle_stop (EV_A_ idle);
3492} 4406}
3493#endif 4407#endif
3494 4408
3495void 4409void
3496ev_embed_start (EV_P_ ev_embed *w) 4410ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3497{ 4411{
3498 if (expect_false (ev_is_active (w))) 4412 if (expect_false (ev_is_active (w)))
3499 return; 4413 return;
3500 4414
3501 { 4415 {
… …
3522 4436
3523 EV_FREQUENT_CHECK; 4437 EV_FREQUENT_CHECK;
3524} 4438}
3525 4439
3526void 4440void
3527ev_embed_stop (EV_P_ ev_embed *w) 4441ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3528{ 4442{
3529 clear_pending (EV_A_ (W)w); 4443 clear_pending (EV_A_ (W)w);
3530 if (expect_false (!ev_is_active (w))) 4444 if (expect_false (!ev_is_active (w)))
3531 return; 4445 return;
3532 4446
… …
3542} 4456}
3543#endif 4457#endif
3544 4458
3545#if EV_FORK_ENABLE 4459#if EV_FORK_ENABLE
3546void 4460void
3547ev_fork_start (EV_P_ ev_fork *w) 4461ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3548{ 4462{
3549 if (expect_false (ev_is_active (w))) 4463 if (expect_false (ev_is_active (w)))
3550 return; 4464 return;
3551 4465
3552 EV_FREQUENT_CHECK; 4466 EV_FREQUENT_CHECK;
… …
3557 4471
3558 EV_FREQUENT_CHECK; 4472 EV_FREQUENT_CHECK;
3559} 4473}
3560 4474
3561void 4475void
3562ev_fork_stop (EV_P_ ev_fork *w) 4476ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3563{ 4477{
3564 clear_pending (EV_A_ (W)w); 4478 clear_pending (EV_A_ (W)w);
3565 if (expect_false (!ev_is_active (w))) 4479 if (expect_false (!ev_is_active (w)))
3566 return; 4480 return;
3567 4481
… …
3578 4492
3579 EV_FREQUENT_CHECK; 4493 EV_FREQUENT_CHECK;
3580} 4494}
3581#endif 4495#endif
3582 4496
4497#if EV_CLEANUP_ENABLE
4498void
4499ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4500{
4501 if (expect_false (ev_is_active (w)))
4502 return;
4503
4504 EV_FREQUENT_CHECK;
4505
4506 ev_start (EV_A_ (W)w, ++cleanupcnt);
4507 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4508 cleanups [cleanupcnt - 1] = w;
4509
4510 /* cleanup watchers should never keep a refcount on the loop */
4511 ev_unref (EV_A);
4512 EV_FREQUENT_CHECK;
4513}
4514
4515void
4516ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4517{
4518 clear_pending (EV_A_ (W)w);
4519 if (expect_false (!ev_is_active (w)))
4520 return;
4521
4522 EV_FREQUENT_CHECK;
4523 ev_ref (EV_A);
4524
4525 {
4526 int active = ev_active (w);
4527
4528 cleanups [active - 1] = cleanups [--cleanupcnt];
4529 ev_active (cleanups [active - 1]) = active;
4530 }
4531
4532 ev_stop (EV_A_ (W)w);
4533
4534 EV_FREQUENT_CHECK;
4535}
4536#endif
4537
3583#if EV_ASYNC_ENABLE 4538#if EV_ASYNC_ENABLE
3584void 4539void
3585ev_async_start (EV_P_ ev_async *w) 4540ev_async_start (EV_P_ ev_async *w) EV_THROW
3586{ 4541{
3587 if (expect_false (ev_is_active (w))) 4542 if (expect_false (ev_is_active (w)))
3588 return; 4543 return;
3589 4544
3590 w->sent = 0; 4545 w->sent = 0;
… …
3599 4554
3600 EV_FREQUENT_CHECK; 4555 EV_FREQUENT_CHECK;
3601} 4556}
3602 4557
3603void 4558void
3604ev_async_stop (EV_P_ ev_async *w) 4559ev_async_stop (EV_P_ ev_async *w) EV_THROW
3605{ 4560{
3606 clear_pending (EV_A_ (W)w); 4561 clear_pending (EV_A_ (W)w);
3607 if (expect_false (!ev_is_active (w))) 4562 if (expect_false (!ev_is_active (w)))
3608 return; 4563 return;
3609 4564
… …
3620 4575
3621 EV_FREQUENT_CHECK; 4576 EV_FREQUENT_CHECK;
3622} 4577}
3623 4578
3624void 4579void
3625ev_async_send (EV_P_ ev_async *w) 4580ev_async_send (EV_P_ ev_async *w) EV_THROW
3626{ 4581{
3627 w->sent = 1; 4582 w->sent = 1;
3628 evpipe_write (EV_A_ &async_pending); 4583 evpipe_write (EV_A_ &async_pending);
3629} 4584}
3630#endif 4585#endif
… …
3667 4622
3668 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4623 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3669} 4624}
3670 4625
3671void 4626void
3672ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4627ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3673{ 4628{
3674 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4629 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3675 4630
3676 if (expect_false (!once)) 4631 if (expect_false (!once))
3677 { 4632 {
… …
3698} 4653}
3699 4654
3700/*****************************************************************************/ 4655/*****************************************************************************/
3701 4656
3702#if EV_WALK_ENABLE 4657#if EV_WALK_ENABLE
3703void 4658void ecb_cold
3704ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4659ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3705{ 4660{
3706 int i, j; 4661 int i, j;
3707 ev_watcher_list *wl, *wn; 4662 ev_watcher_list *wl, *wn;
3708 4663
3709 if (types & (EV_IO | EV_EMBED)) 4664 if (types & (EV_IO | EV_EMBED))
… …
3752 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4707 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3753#endif 4708#endif
3754 4709
3755#if EV_IDLE_ENABLE 4710#if EV_IDLE_ENABLE
3756 if (types & EV_IDLE) 4711 if (types & EV_IDLE)
3757 for (j = NUMPRI; i--; ) 4712 for (j = NUMPRI; j--; )
3758 for (i = idlecnt [j]; i--; ) 4713 for (i = idlecnt [j]; i--; )
3759 cb (EV_A_ EV_IDLE, idles [j][i]); 4714 cb (EV_A_ EV_IDLE, idles [j][i]);
3760#endif 4715#endif
3761 4716
3762#if EV_FORK_ENABLE 4717#if EV_FORK_ENABLE
… …
3815 4770
3816#if EV_MULTIPLICITY 4771#if EV_MULTIPLICITY
3817 #include "ev_wrap.h" 4772 #include "ev_wrap.h"
3818#endif 4773#endif
3819 4774
3820EV_CPP(})
3821

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