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Comparing libev/ev.c (file contents):
Revision 1.96 by root, Sun Nov 11 01:50:36 2007 UTC vs.
Revision 1.317 by root, Sat Nov 14 00:15:21 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 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 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
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-
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-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
38 65
39# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
40# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
41# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
42# endif 72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
79# endif
80# endif
43 81
44# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
88# endif
89
90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
45# define EV_USE_SELECT 1 92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
46# endif 95# endif
96# endif
47 97
48# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
49# define EV_USE_POLL 1 100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
50# endif 103# endif
51 104# endif
52# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 105
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
53# define EV_USE_EPOLL 1 108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
54# endif 111# endif
55 112# endif
113
114# ifndef EV_USE_KQUEUE
56# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
57# define EV_USE_KQUEUE 1 116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
58# endif 119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
59 129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
137
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif
153
60#endif 154#endif
61 155
62#include <math.h> 156#include <math.h>
63#include <stdlib.h> 157#include <stdlib.h>
64#include <fcntl.h> 158#include <fcntl.h>
… …
71#include <sys/types.h> 165#include <sys/types.h>
72#include <time.h> 166#include <time.h>
73 167
74#include <signal.h> 168#include <signal.h>
75 169
76#ifndef WIN32
77# include <unistd.h>
78# include <sys/time.h>
79# include <sys/wait.h>
80#endif
81/**/
82
83#ifndef EV_USE_MONOTONIC
84# define EV_USE_MONOTONIC 1
85#endif
86
87#ifndef EV_USE_SELECT
88# define EV_USE_SELECT 1
89#endif
90
91#ifndef EV_USE_POLL
92# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
93#endif
94
95#ifndef EV_USE_EPOLL
96# define EV_USE_EPOLL 0
97#endif
98
99#ifndef EV_USE_KQUEUE
100# define EV_USE_KQUEUE 0
101#endif
102
103#ifndef EV_USE_WIN32
104# ifdef WIN32
105# define EV_USE_WIN32 0 /* it does not exist, use select */
106# undef EV_USE_SELECT
107# define EV_USE_SELECT 1
108# else
109# define EV_USE_WIN32 0
110# endif
111#endif
112
113#ifndef EV_USE_REALTIME
114# define EV_USE_REALTIME 1
115#endif
116
117/**/
118
119#ifndef CLOCK_MONOTONIC
120# undef EV_USE_MONOTONIC
121# define EV_USE_MONOTONIC 0
122#endif
123
124#ifndef CLOCK_REALTIME
125# undef EV_USE_REALTIME
126# define EV_USE_REALTIME 0
127#endif
128
129/**/
130
131#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
132#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
133#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
134/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
135
136#ifdef EV_H 170#ifdef EV_H
137# include EV_H 171# include EV_H
138#else 172#else
139# include "ev.h" 173# include "ev.h"
140#endif 174#endif
141 175
176#ifndef _WIN32
177# include <sys/time.h>
178# include <sys/wait.h>
179# include <unistd.h>
180#else
181# include <io.h>
182# define WIN32_LEAN_AND_MEAN
183# include <windows.h>
184# ifndef EV_SELECT_IS_WINSOCKET
185# define EV_SELECT_IS_WINSOCKET 1
186# endif
187#endif
188
189/* this block tries to deduce configuration from header-defined symbols and defaults */
190
191/* try to deduce the maximum number of signals on this platform */
192#if defined (EV_NSIG)
193/* use what's provided */
194#elif defined (NSIG)
195# define EV_NSIG (NSIG)
196#elif defined(_NSIG)
197# define EV_NSIG (_NSIG)
198#elif defined (SIGMAX)
199# define EV_NSIG (SIGMAX+1)
200#elif defined (SIG_MAX)
201# define EV_NSIG (SIG_MAX+1)
202#elif defined (_SIG_MAX)
203# define EV_NSIG (_SIG_MAX+1)
204#elif defined (MAXSIG)
205# define EV_NSIG (MAXSIG+1)
206#elif defined (MAX_SIG)
207# define EV_NSIG (MAX_SIG+1)
208#elif defined (SIGARRAYSIZE)
209# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
210#elif defined (_sys_nsig)
211# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
212#else
213# error "unable to find value for NSIG, please report"
214/* to make it compile regardless, just remove the above line */
215# define EV_NSIG 65
216#endif
217
218#ifndef EV_USE_CLOCK_SYSCALL
219# if __linux && __GLIBC__ >= 2
220# define EV_USE_CLOCK_SYSCALL 1
221# else
222# define EV_USE_CLOCK_SYSCALL 0
223# endif
224#endif
225
226#ifndef EV_USE_MONOTONIC
227# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
228# define EV_USE_MONOTONIC 1
229# else
230# define EV_USE_MONOTONIC 0
231# endif
232#endif
233
234#ifndef EV_USE_REALTIME
235# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
236#endif
237
238#ifndef EV_USE_NANOSLEEP
239# if _POSIX_C_SOURCE >= 199309L
240# define EV_USE_NANOSLEEP 1
241# else
242# define EV_USE_NANOSLEEP 0
243# endif
244#endif
245
246#ifndef EV_USE_SELECT
247# define EV_USE_SELECT 1
248#endif
249
250#ifndef EV_USE_POLL
251# ifdef _WIN32
252# define EV_USE_POLL 0
253# else
254# define EV_USE_POLL 1
255# endif
256#endif
257
258#ifndef EV_USE_EPOLL
259# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
260# define EV_USE_EPOLL 1
261# else
262# define EV_USE_EPOLL 0
263# endif
264#endif
265
266#ifndef EV_USE_KQUEUE
267# define EV_USE_KQUEUE 0
268#endif
269
270#ifndef EV_USE_PORT
271# define EV_USE_PORT 0
272#endif
273
274#ifndef EV_USE_INOTIFY
275# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
276# define EV_USE_INOTIFY 1
277# else
278# define EV_USE_INOTIFY 0
279# endif
280#endif
281
282#ifndef EV_PID_HASHSIZE
283# if EV_MINIMAL
284# define EV_PID_HASHSIZE 1
285# else
286# define EV_PID_HASHSIZE 16
287# endif
288#endif
289
290#ifndef EV_INOTIFY_HASHSIZE
291# if EV_MINIMAL
292# define EV_INOTIFY_HASHSIZE 1
293# else
294# define EV_INOTIFY_HASHSIZE 16
295# endif
296#endif
297
298#ifndef EV_USE_EVENTFD
299# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
300# define EV_USE_EVENTFD 1
301# else
302# define EV_USE_EVENTFD 0
303# endif
304#endif
305
306#ifndef EV_USE_SIGNALFD
307# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
308# define EV_USE_SIGNALFD 1
309# else
310# define EV_USE_SIGNALFD 0
311# endif
312#endif
313
314#if 0 /* debugging */
315# define EV_VERIFY 3
316# define EV_USE_4HEAP 1
317# define EV_HEAP_CACHE_AT 1
318#endif
319
320#ifndef EV_VERIFY
321# define EV_VERIFY !EV_MINIMAL
322#endif
323
324#ifndef EV_USE_4HEAP
325# define EV_USE_4HEAP !EV_MINIMAL
326#endif
327
328#ifndef EV_HEAP_CACHE_AT
329# define EV_HEAP_CACHE_AT !EV_MINIMAL
330#endif
331
332/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
333/* which makes programs even slower. might work on other unices, too. */
334#if EV_USE_CLOCK_SYSCALL
335# include <syscall.h>
336# ifdef SYS_clock_gettime
337# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
338# undef EV_USE_MONOTONIC
339# define EV_USE_MONOTONIC 1
340# else
341# undef EV_USE_CLOCK_SYSCALL
342# define EV_USE_CLOCK_SYSCALL 0
343# endif
344#endif
345
346/* this block fixes any misconfiguration where we know we run into trouble otherwise */
347
348#ifndef CLOCK_MONOTONIC
349# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 0
351#endif
352
353#ifndef CLOCK_REALTIME
354# undef EV_USE_REALTIME
355# define EV_USE_REALTIME 0
356#endif
357
358#if !EV_STAT_ENABLE
359# undef EV_USE_INOTIFY
360# define EV_USE_INOTIFY 0
361#endif
362
363#if !EV_USE_NANOSLEEP
364# ifndef _WIN32
365# include <sys/select.h>
366# endif
367#endif
368
369#if EV_USE_INOTIFY
370# include <sys/utsname.h>
371# include <sys/statfs.h>
372# include <sys/inotify.h>
373/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
374# ifndef IN_DONT_FOLLOW
375# undef EV_USE_INOTIFY
376# define EV_USE_INOTIFY 0
377# endif
378#endif
379
380#if EV_SELECT_IS_WINSOCKET
381# include <winsock.h>
382#endif
383
384#if EV_USE_EVENTFD
385/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
386# include <stdint.h>
387# ifndef EFD_NONBLOCK
388# define EFD_NONBLOCK O_NONBLOCK
389# endif
390# ifndef EFD_CLOEXEC
391# ifdef O_CLOEXEC
392# define EFD_CLOEXEC O_CLOEXEC
393# else
394# define EFD_CLOEXEC 02000000
395# endif
396# endif
397# ifdef __cplusplus
398extern "C" {
399# endif
400int eventfd (unsigned int initval, int flags);
401# ifdef __cplusplus
402}
403# endif
404#endif
405
406#if EV_USE_SIGNALFD
407/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
408# include <stdint.h>
409# ifndef SFD_NONBLOCK
410# define SFD_NONBLOCK O_NONBLOCK
411# endif
412# ifndef SFD_CLOEXEC
413# ifdef O_CLOEXEC
414# define SFD_CLOEXEC O_CLOEXEC
415# else
416# define SFD_CLOEXEC 02000000
417# endif
418# endif
419# ifdef __cplusplus
420extern "C" {
421# endif
422int signalfd (int fd, const sigset_t *mask, int flags);
423
424struct signalfd_siginfo
425{
426 uint32_t ssi_signo;
427 char pad[128 - sizeof (uint32_t)];
428};
429# ifdef __cplusplus
430}
431# endif
432#endif
433
434
435/**/
436
437#if EV_VERIFY >= 3
438# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
439#else
440# define EV_FREQUENT_CHECK do { } while (0)
441#endif
442
443/*
444 * This is used to avoid floating point rounding problems.
445 * It is added to ev_rt_now when scheduling periodics
446 * to ensure progress, time-wise, even when rounding
447 * errors are against us.
448 * This value is good at least till the year 4000.
449 * Better solutions welcome.
450 */
451#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
452
453#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
454#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
455
142#if __GNUC__ >= 3 456#if __GNUC__ >= 4
143# define expect(expr,value) __builtin_expect ((expr),(value)) 457# define expect(expr,value) __builtin_expect ((expr),(value))
144# define inline inline 458# define noinline __attribute__ ((noinline))
145#else 459#else
146# define expect(expr,value) (expr) 460# define expect(expr,value) (expr)
147# define inline static 461# define noinline
462# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
463# define inline
464# endif
148#endif 465#endif
149 466
150#define expect_false(expr) expect ((expr) != 0, 0) 467#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1) 468#define expect_true(expr) expect ((expr) != 0, 1)
469#define inline_size static inline
152 470
471#if EV_MINIMAL
472# define inline_speed static noinline
473#else
474# define inline_speed static inline
475#endif
476
153#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 477#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
478
479#if EV_MINPRI == EV_MAXPRI
480# define ABSPRI(w) (((W)w), 0)
481#else
154#define ABSPRI(w) ((w)->priority - EV_MINPRI) 482# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
483#endif
155 484
485#define EMPTY /* required for microsofts broken pseudo-c compiler */
486#define EMPTY2(a,b) /* used to suppress some warnings */
487
156typedef struct ev_watcher *W; 488typedef ev_watcher *W;
157typedef struct ev_watcher_list *WL; 489typedef ev_watcher_list *WL;
158typedef struct ev_watcher_time *WT; 490typedef ev_watcher_time *WT;
159 491
492#define ev_active(w) ((W)(w))->active
493#define ev_at(w) ((WT)(w))->at
494
495#if EV_USE_REALTIME
496/* sig_atomic_t is used to avoid per-thread variables or locking but still */
497/* giving it a reasonably high chance of working on typical architetcures */
498static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
499#endif
500
501#if EV_USE_MONOTONIC
160static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 502static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
503#endif
161 504
505#ifndef EV_FD_TO_WIN32_HANDLE
506# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
507#endif
508#ifndef EV_WIN32_HANDLE_TO_FD
509# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (fd, 0)
510#endif
511#ifndef EV_WIN32_CLOSE_FD
512# define EV_WIN32_CLOSE_FD(fd) close (fd)
513#endif
514
515#ifdef _WIN32
162#include "ev_win32.c" 516# include "ev_win32.c"
517#endif
163 518
164/*****************************************************************************/ 519/*****************************************************************************/
165 520
166static void (*syserr_cb)(const char *msg); 521static void (*syserr_cb)(const char *msg);
167 522
523void
168void ev_set_syserr_cb (void (*cb)(const char *msg)) 524ev_set_syserr_cb (void (*cb)(const char *msg))
169{ 525{
170 syserr_cb = cb; 526 syserr_cb = cb;
171} 527}
172 528
173static void 529static void noinline
174syserr (const char *msg) 530ev_syserr (const char *msg)
175{ 531{
176 if (!msg) 532 if (!msg)
177 msg = "(libev) system error"; 533 msg = "(libev) system error";
178 534
179 if (syserr_cb) 535 if (syserr_cb)
… …
183 perror (msg); 539 perror (msg);
184 abort (); 540 abort ();
185 } 541 }
186} 542}
187 543
544static void *
545ev_realloc_emul (void *ptr, long size)
546{
547 /* some systems, notably openbsd and darwin, fail to properly
548 * implement realloc (x, 0) (as required by both ansi c-98 and
549 * the single unix specification, so work around them here.
550 */
551
552 if (size)
553 return realloc (ptr, size);
554
555 free (ptr);
556 return 0;
557}
558
188static void *(*alloc)(void *ptr, long size); 559static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
189 560
561void
190void ev_set_allocator (void *(*cb)(void *ptr, long size)) 562ev_set_allocator (void *(*cb)(void *ptr, long size))
191{ 563{
192 alloc = cb; 564 alloc = cb;
193} 565}
194 566
195static void * 567inline_speed void *
196ev_realloc (void *ptr, long size) 568ev_realloc (void *ptr, long size)
197{ 569{
198 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 570 ptr = alloc (ptr, size);
199 571
200 if (!ptr && size) 572 if (!ptr && size)
201 { 573 {
202 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 574 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
203 abort (); 575 abort ();
… …
209#define ev_malloc(size) ev_realloc (0, (size)) 581#define ev_malloc(size) ev_realloc (0, (size))
210#define ev_free(ptr) ev_realloc ((ptr), 0) 582#define ev_free(ptr) ev_realloc ((ptr), 0)
211 583
212/*****************************************************************************/ 584/*****************************************************************************/
213 585
586/* set in reify when reification needed */
587#define EV_ANFD_REIFY 1
588
589/* file descriptor info structure */
214typedef struct 590typedef struct
215{ 591{
216 WL head; 592 WL head;
217 unsigned char events; 593 unsigned char events; /* the events watched for */
594 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
595 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
218 unsigned char reify; 596 unsigned char unused;
597#if EV_USE_EPOLL
598 unsigned int egen; /* generation counter to counter epoll bugs */
599#endif
600#if EV_SELECT_IS_WINSOCKET
601 SOCKET handle;
602#endif
219} ANFD; 603} ANFD;
220 604
605/* stores the pending event set for a given watcher */
221typedef struct 606typedef struct
222{ 607{
223 W w; 608 W w;
224 int events; 609 int events; /* the pending event set for the given watcher */
225} ANPENDING; 610} ANPENDING;
611
612#if EV_USE_INOTIFY
613/* hash table entry per inotify-id */
614typedef struct
615{
616 WL head;
617} ANFS;
618#endif
619
620/* Heap Entry */
621#if EV_HEAP_CACHE_AT
622 /* a heap element */
623 typedef struct {
624 ev_tstamp at;
625 WT w;
626 } ANHE;
627
628 #define ANHE_w(he) (he).w /* access watcher, read-write */
629 #define ANHE_at(he) (he).at /* access cached at, read-only */
630 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
631#else
632 /* a heap element */
633 typedef WT ANHE;
634
635 #define ANHE_w(he) (he)
636 #define ANHE_at(he) (he)->at
637 #define ANHE_at_cache(he)
638#endif
226 639
227#if EV_MULTIPLICITY 640#if EV_MULTIPLICITY
228 641
229 struct ev_loop 642 struct ev_loop
230 { 643 {
231 ev_tstamp ev_rt_now; 644 ev_tstamp ev_rt_now;
645 #define ev_rt_now ((loop)->ev_rt_now)
232 #define VAR(name,decl) decl; 646 #define VAR(name,decl) decl;
233 #include "ev_vars.h" 647 #include "ev_vars.h"
234 #undef VAR 648 #undef VAR
235 }; 649 };
236 #include "ev_wrap.h" 650 #include "ev_wrap.h"
237 651
238 struct ev_loop default_loop_struct; 652 static struct ev_loop default_loop_struct;
239 static struct ev_loop *default_loop; 653 struct ev_loop *ev_default_loop_ptr;
240 654
241#else 655#else
242 656
243 ev_tstamp ev_rt_now; 657 ev_tstamp ev_rt_now;
244 #define VAR(name,decl) static decl; 658 #define VAR(name,decl) static decl;
245 #include "ev_vars.h" 659 #include "ev_vars.h"
246 #undef VAR 660 #undef VAR
247 661
248 static int default_loop; 662 static int ev_default_loop_ptr;
249 663
250#endif 664#endif
665
666#if EV_MINIMAL < 2
667# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
668# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
669# define EV_INVOKE_PENDING invoke_cb (EV_A)
670#else
671# define EV_RELEASE_CB (void)0
672# define EV_ACQUIRE_CB (void)0
673# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
674#endif
675
676#define EVUNLOOP_RECURSE 0x80
251 677
252/*****************************************************************************/ 678/*****************************************************************************/
253 679
680#ifndef EV_HAVE_EV_TIME
254ev_tstamp 681ev_tstamp
255ev_time (void) 682ev_time (void)
256{ 683{
257#if EV_USE_REALTIME 684#if EV_USE_REALTIME
685 if (expect_true (have_realtime))
686 {
258 struct timespec ts; 687 struct timespec ts;
259 clock_gettime (CLOCK_REALTIME, &ts); 688 clock_gettime (CLOCK_REALTIME, &ts);
260 return ts.tv_sec + ts.tv_nsec * 1e-9; 689 return ts.tv_sec + ts.tv_nsec * 1e-9;
261#else 690 }
691#endif
692
262 struct timeval tv; 693 struct timeval tv;
263 gettimeofday (&tv, 0); 694 gettimeofday (&tv, 0);
264 return tv.tv_sec + tv.tv_usec * 1e-6; 695 return tv.tv_sec + tv.tv_usec * 1e-6;
265#endif
266} 696}
697#endif
267 698
268inline ev_tstamp 699inline_size ev_tstamp
269get_clock (void) 700get_clock (void)
270{ 701{
271#if EV_USE_MONOTONIC 702#if EV_USE_MONOTONIC
272 if (expect_true (have_monotonic)) 703 if (expect_true (have_monotonic))
273 { 704 {
… …
286{ 717{
287 return ev_rt_now; 718 return ev_rt_now;
288} 719}
289#endif 720#endif
290 721
291#define array_roundsize(type,n) ((n) | 4 & ~3) 722void
723ev_sleep (ev_tstamp delay)
724{
725 if (delay > 0.)
726 {
727#if EV_USE_NANOSLEEP
728 struct timespec ts;
729
730 ts.tv_sec = (time_t)delay;
731 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
732
733 nanosleep (&ts, 0);
734#elif defined(_WIN32)
735 Sleep ((unsigned long)(delay * 1e3));
736#else
737 struct timeval tv;
738
739 tv.tv_sec = (time_t)delay;
740 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
741
742 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
743 /* something not guaranteed by newer posix versions, but guaranteed */
744 /* by older ones */
745 select (0, 0, 0, 0, &tv);
746#endif
747 }
748}
749
750/*****************************************************************************/
751
752#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
753
754/* find a suitable new size for the given array, */
755/* hopefully by rounding to a ncie-to-malloc size */
756inline_size int
757array_nextsize (int elem, int cur, int cnt)
758{
759 int ncur = cur + 1;
760
761 do
762 ncur <<= 1;
763 while (cnt > ncur);
764
765 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
766 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
767 {
768 ncur *= elem;
769 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
770 ncur = ncur - sizeof (void *) * 4;
771 ncur /= elem;
772 }
773
774 return ncur;
775}
776
777static noinline void *
778array_realloc (int elem, void *base, int *cur, int cnt)
779{
780 *cur = array_nextsize (elem, *cur, cnt);
781 return ev_realloc (base, elem * *cur);
782}
783
784#define array_init_zero(base,count) \
785 memset ((void *)(base), 0, sizeof (*(base)) * (count))
292 786
293#define array_needsize(type,base,cur,cnt,init) \ 787#define array_needsize(type,base,cur,cnt,init) \
294 if (expect_false ((cnt) > cur)) \ 788 if (expect_false ((cnt) > (cur))) \
295 { \ 789 { \
296 int newcnt = cur; \ 790 int ocur_ = (cur); \
297 do \ 791 (base) = (type *)array_realloc \
298 { \ 792 (sizeof (type), (base), &(cur), (cnt)); \
299 newcnt = array_roundsize (type, newcnt << 1); \ 793 init ((base) + (ocur_), (cur) - ocur_); \
300 } \
301 while ((cnt) > newcnt); \
302 \
303 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
304 init (base + cur, newcnt - cur); \
305 cur = newcnt; \
306 } 794 }
307 795
796#if 0
308#define array_slim(type,stem) \ 797#define array_slim(type,stem) \
309 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 798 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
310 { \ 799 { \
311 stem ## max = array_roundsize (stem ## cnt >> 1); \ 800 stem ## max = array_roundsize (stem ## cnt >> 1); \
312 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 801 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
313 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 802 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
314 } 803 }
315 804#endif
316/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
317/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
318#define array_free_microshit(stem) \
319 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
320 805
321#define array_free(stem, idx) \ 806#define array_free(stem, idx) \
322 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 807 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
323 808
324/*****************************************************************************/ 809/*****************************************************************************/
325 810
326static void 811/* dummy callback for pending events */
327anfds_init (ANFD *base, int count) 812static void noinline
813pendingcb (EV_P_ ev_prepare *w, int revents)
328{ 814{
329 while (count--)
330 {
331 base->head = 0;
332 base->events = EV_NONE;
333 base->reify = 0;
334
335 ++base;
336 }
337} 815}
338 816
339void 817void noinline
340ev_feed_event (EV_P_ void *w, int revents) 818ev_feed_event (EV_P_ void *w, int revents)
341{ 819{
342 W w_ = (W)w; 820 W w_ = (W)w;
821 int pri = ABSPRI (w_);
343 822
344 if (w_->pending) 823 if (expect_false (w_->pending))
824 pendings [pri][w_->pending - 1].events |= revents;
825 else
345 { 826 {
827 w_->pending = ++pendingcnt [pri];
828 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
829 pendings [pri][w_->pending - 1].w = w_;
346 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 830 pendings [pri][w_->pending - 1].events = revents;
347 return;
348 } 831 }
349
350 w_->pending = ++pendingcnt [ABSPRI (w_)];
351 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
352 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
353 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
354} 832}
355 833
356static void 834inline_speed void
835feed_reverse (EV_P_ W w)
836{
837 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
838 rfeeds [rfeedcnt++] = w;
839}
840
841inline_size void
842feed_reverse_done (EV_P_ int revents)
843{
844 do
845 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
846 while (rfeedcnt);
847}
848
849inline_speed void
357queue_events (EV_P_ W *events, int eventcnt, int type) 850queue_events (EV_P_ W *events, int eventcnt, int type)
358{ 851{
359 int i; 852 int i;
360 853
361 for (i = 0; i < eventcnt; ++i) 854 for (i = 0; i < eventcnt; ++i)
362 ev_feed_event (EV_A_ events [i], type); 855 ev_feed_event (EV_A_ events [i], type);
363} 856}
364 857
858/*****************************************************************************/
859
365inline void 860inline_speed void
366fd_event (EV_P_ int fd, int revents) 861fd_event_nc (EV_P_ int fd, int revents)
367{ 862{
368 ANFD *anfd = anfds + fd; 863 ANFD *anfd = anfds + fd;
369 struct ev_io *w; 864 ev_io *w;
370 865
371 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 866 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
372 { 867 {
373 int ev = w->events & revents; 868 int ev = w->events & revents;
374 869
375 if (ev) 870 if (ev)
376 ev_feed_event (EV_A_ (W)w, ev); 871 ev_feed_event (EV_A_ (W)w, ev);
377 } 872 }
378} 873}
379 874
875/* do not submit kernel events for fds that have reify set */
876/* because that means they changed while we were polling for new events */
877inline_speed void
878fd_event (EV_P_ int fd, int revents)
879{
880 ANFD *anfd = anfds + fd;
881
882 if (expect_true (!anfd->reify))
883 fd_event_nc (EV_A_ fd, revents);
884}
885
380void 886void
381ev_feed_fd_event (EV_P_ int fd, int revents) 887ev_feed_fd_event (EV_P_ int fd, int revents)
382{ 888{
889 if (fd >= 0 && fd < anfdmax)
383 fd_event (EV_A_ fd, revents); 890 fd_event_nc (EV_A_ fd, revents);
384} 891}
385 892
386/*****************************************************************************/ 893/* make sure the external fd watch events are in-sync */
387 894/* with the kernel/libev internal state */
388static void 895inline_size void
389fd_reify (EV_P) 896fd_reify (EV_P)
390{ 897{
391 int i; 898 int i;
392 899
393 for (i = 0; i < fdchangecnt; ++i) 900 for (i = 0; i < fdchangecnt; ++i)
394 { 901 {
395 int fd = fdchanges [i]; 902 int fd = fdchanges [i];
396 ANFD *anfd = anfds + fd; 903 ANFD *anfd = anfds + fd;
397 struct ev_io *w; 904 ev_io *w;
398 905
399 int events = 0; 906 unsigned char events = 0;
400 907
401 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 908 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
402 events |= w->events; 909 events |= (unsigned char)w->events;
403 910
911#if EV_SELECT_IS_WINSOCKET
912 if (events)
913 {
914 unsigned long arg;
915 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
916 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
917 }
918#endif
919
920 {
921 unsigned char o_events = anfd->events;
922 unsigned char o_reify = anfd->reify;
923
404 anfd->reify = 0; 924 anfd->reify = 0;
405
406 method_modify (EV_A_ fd, anfd->events, events);
407 anfd->events = events; 925 anfd->events = events;
926
927 if (o_events != events || o_reify & EV__IOFDSET)
928 backend_modify (EV_A_ fd, o_events, events);
929 }
408 } 930 }
409 931
410 fdchangecnt = 0; 932 fdchangecnt = 0;
411} 933}
412 934
413static void 935/* something about the given fd changed */
936inline_size void
414fd_change (EV_P_ int fd) 937fd_change (EV_P_ int fd, int flags)
415{ 938{
416 if (anfds [fd].reify) 939 unsigned char reify = anfds [fd].reify;
417 return;
418
419 anfds [fd].reify = 1; 940 anfds [fd].reify |= flags;
420 941
942 if (expect_true (!reify))
943 {
421 ++fdchangecnt; 944 ++fdchangecnt;
422 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 945 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
423 fdchanges [fdchangecnt - 1] = fd; 946 fdchanges [fdchangecnt - 1] = fd;
947 }
424} 948}
425 949
426static void 950/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
951inline_speed void
427fd_kill (EV_P_ int fd) 952fd_kill (EV_P_ int fd)
428{ 953{
429 struct ev_io *w; 954 ev_io *w;
430 955
431 while ((w = (struct ev_io *)anfds [fd].head)) 956 while ((w = (ev_io *)anfds [fd].head))
432 { 957 {
433 ev_io_stop (EV_A_ w); 958 ev_io_stop (EV_A_ w);
434 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 959 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
435 } 960 }
436} 961}
437 962
438static int 963/* check whether the given fd is atcually valid, for error recovery */
964inline_size int
439fd_valid (int fd) 965fd_valid (int fd)
440{ 966{
441#ifdef WIN32 967#ifdef _WIN32
442 return !!win32_get_osfhandle (fd); 968 return _get_osfhandle (fd) != -1;
443#else 969#else
444 return fcntl (fd, F_GETFD) != -1; 970 return fcntl (fd, F_GETFD) != -1;
445#endif 971#endif
446} 972}
447 973
448/* called on EBADF to verify fds */ 974/* called on EBADF to verify fds */
449static void 975static void noinline
450fd_ebadf (EV_P) 976fd_ebadf (EV_P)
451{ 977{
452 int fd; 978 int fd;
453 979
454 for (fd = 0; fd < anfdmax; ++fd) 980 for (fd = 0; fd < anfdmax; ++fd)
455 if (anfds [fd].events) 981 if (anfds [fd].events)
456 if (!fd_valid (fd) == -1 && errno == EBADF) 982 if (!fd_valid (fd) && errno == EBADF)
457 fd_kill (EV_A_ fd); 983 fd_kill (EV_A_ fd);
458} 984}
459 985
460/* called on ENOMEM in select/poll to kill some fds and retry */ 986/* called on ENOMEM in select/poll to kill some fds and retry */
461static void 987static void noinline
462fd_enomem (EV_P) 988fd_enomem (EV_P)
463{ 989{
464 int fd; 990 int fd;
465 991
466 for (fd = anfdmax; fd--; ) 992 for (fd = anfdmax; fd--; )
467 if (anfds [fd].events) 993 if (anfds [fd].events)
468 { 994 {
469 fd_kill (EV_A_ fd); 995 fd_kill (EV_A_ fd);
470 return; 996 break;
471 } 997 }
472} 998}
473 999
474/* usually called after fork if method needs to re-arm all fds from scratch */ 1000/* usually called after fork if backend needs to re-arm all fds from scratch */
475static void 1001static void noinline
476fd_rearm_all (EV_P) 1002fd_rearm_all (EV_P)
477{ 1003{
478 int fd; 1004 int fd;
479 1005
480 /* this should be highly optimised to not do anything but set a flag */
481 for (fd = 0; fd < anfdmax; ++fd) 1006 for (fd = 0; fd < anfdmax; ++fd)
482 if (anfds [fd].events) 1007 if (anfds [fd].events)
483 { 1008 {
484 anfds [fd].events = 0; 1009 anfds [fd].events = 0;
485 fd_change (EV_A_ fd); 1010 anfds [fd].emask = 0;
1011 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
486 } 1012 }
487} 1013}
488 1014
489/*****************************************************************************/ 1015/*****************************************************************************/
490 1016
1017/*
1018 * the heap functions want a real array index. array index 0 uis guaranteed to not
1019 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1020 * the branching factor of the d-tree.
1021 */
1022
1023/*
1024 * at the moment we allow libev the luxury of two heaps,
1025 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1026 * which is more cache-efficient.
1027 * the difference is about 5% with 50000+ watchers.
1028 */
1029#if EV_USE_4HEAP
1030
1031#define DHEAP 4
1032#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1033#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1034#define UPHEAP_DONE(p,k) ((p) == (k))
1035
1036/* away from the root */
1037inline_speed void
1038downheap (ANHE *heap, int N, int k)
1039{
1040 ANHE he = heap [k];
1041 ANHE *E = heap + N + HEAP0;
1042
1043 for (;;)
1044 {
1045 ev_tstamp minat;
1046 ANHE *minpos;
1047 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1048
1049 /* find minimum child */
1050 if (expect_true (pos + DHEAP - 1 < E))
1051 {
1052 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1053 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1054 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1055 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1056 }
1057 else if (pos < E)
1058 {
1059 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1060 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1061 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1062 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1063 }
1064 else
1065 break;
1066
1067 if (ANHE_at (he) <= minat)
1068 break;
1069
1070 heap [k] = *minpos;
1071 ev_active (ANHE_w (*minpos)) = k;
1072
1073 k = minpos - heap;
1074 }
1075
1076 heap [k] = he;
1077 ev_active (ANHE_w (he)) = k;
1078}
1079
1080#else /* 4HEAP */
1081
1082#define HEAP0 1
1083#define HPARENT(k) ((k) >> 1)
1084#define UPHEAP_DONE(p,k) (!(p))
1085
1086/* away from the root */
1087inline_speed void
1088downheap (ANHE *heap, int N, int k)
1089{
1090 ANHE he = heap [k];
1091
1092 for (;;)
1093 {
1094 int c = k << 1;
1095
1096 if (c >= N + HEAP0)
1097 break;
1098
1099 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1100 ? 1 : 0;
1101
1102 if (ANHE_at (he) <= ANHE_at (heap [c]))
1103 break;
1104
1105 heap [k] = heap [c];
1106 ev_active (ANHE_w (heap [k])) = k;
1107
1108 k = c;
1109 }
1110
1111 heap [k] = he;
1112 ev_active (ANHE_w (he)) = k;
1113}
1114#endif
1115
1116/* towards the root */
1117inline_speed void
1118upheap (ANHE *heap, int k)
1119{
1120 ANHE he = heap [k];
1121
1122 for (;;)
1123 {
1124 int p = HPARENT (k);
1125
1126 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1127 break;
1128
1129 heap [k] = heap [p];
1130 ev_active (ANHE_w (heap [k])) = k;
1131 k = p;
1132 }
1133
1134 heap [k] = he;
1135 ev_active (ANHE_w (he)) = k;
1136}
1137
1138/* move an element suitably so it is in a correct place */
1139inline_size void
1140adjustheap (ANHE *heap, int N, int k)
1141{
1142 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1143 upheap (heap, k);
1144 else
1145 downheap (heap, N, k);
1146}
1147
1148/* rebuild the heap: this function is used only once and executed rarely */
1149inline_size void
1150reheap (ANHE *heap, int N)
1151{
1152 int i;
1153
1154 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1155 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1156 for (i = 0; i < N; ++i)
1157 upheap (heap, i + HEAP0);
1158}
1159
1160/*****************************************************************************/
1161
1162/* associate signal watchers to a signal signal */
1163typedef struct
1164{
1165 EV_ATOMIC_T pending;
1166#if EV_MULTIPLICITY
1167 EV_P;
1168#endif
1169 WL head;
1170} ANSIG;
1171
1172static ANSIG signals [EV_NSIG - 1];
1173
1174/*****************************************************************************/
1175
1176/* used to prepare libev internal fd's */
1177/* this is not fork-safe */
1178inline_speed void
1179fd_intern (int fd)
1180{
1181#ifdef _WIN32
1182 unsigned long arg = 1;
1183 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1184#else
1185 fcntl (fd, F_SETFD, FD_CLOEXEC);
1186 fcntl (fd, F_SETFL, O_NONBLOCK);
1187#endif
1188}
1189
1190static void noinline
1191evpipe_init (EV_P)
1192{
1193 if (!ev_is_active (&pipe_w))
1194 {
1195#if EV_USE_EVENTFD
1196 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1197 if (evfd < 0 && errno == EINVAL)
1198 evfd = eventfd (0, 0);
1199
1200 if (evfd >= 0)
1201 {
1202 evpipe [0] = -1;
1203 fd_intern (evfd); /* doing it twice doesn't hurt */
1204 ev_io_set (&pipe_w, evfd, EV_READ);
1205 }
1206 else
1207#endif
1208 {
1209 while (pipe (evpipe))
1210 ev_syserr ("(libev) error creating signal/async pipe");
1211
1212 fd_intern (evpipe [0]);
1213 fd_intern (evpipe [1]);
1214 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1215 }
1216
1217 ev_io_start (EV_A_ &pipe_w);
1218 ev_unref (EV_A); /* watcher should not keep loop alive */
1219 }
1220}
1221
1222inline_size void
1223evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1224{
1225 if (!*flag)
1226 {
1227 int old_errno = errno; /* save errno because write might clobber it */
1228
1229 *flag = 1;
1230
1231#if EV_USE_EVENTFD
1232 if (evfd >= 0)
1233 {
1234 uint64_t counter = 1;
1235 write (evfd, &counter, sizeof (uint64_t));
1236 }
1237 else
1238#endif
1239 write (evpipe [1], &old_errno, 1);
1240
1241 errno = old_errno;
1242 }
1243}
1244
1245/* called whenever the libev signal pipe */
1246/* got some events (signal, async) */
491static void 1247static void
492upheap (WT *heap, int k) 1248pipecb (EV_P_ ev_io *iow, int revents)
493{ 1249{
494 WT w = heap [k]; 1250 int i;
495 1251
496 while (k && heap [k >> 1]->at > w->at) 1252#if EV_USE_EVENTFD
497 { 1253 if (evfd >= 0)
498 heap [k] = heap [k >> 1];
499 ((W)heap [k])->active = k + 1;
500 k >>= 1;
501 } 1254 {
1255 uint64_t counter;
1256 read (evfd, &counter, sizeof (uint64_t));
1257 }
1258 else
1259#endif
1260 {
1261 char dummy;
1262 read (evpipe [0], &dummy, 1);
1263 }
502 1264
503 heap [k] = w; 1265 if (sig_pending)
504 ((W)heap [k])->active = k + 1; 1266 {
1267 sig_pending = 0;
505 1268
1269 for (i = EV_NSIG - 1; i--; )
1270 if (expect_false (signals [i].pending))
1271 ev_feed_signal_event (EV_A_ i + 1);
1272 }
1273
1274#if EV_ASYNC_ENABLE
1275 if (async_pending)
1276 {
1277 async_pending = 0;
1278
1279 for (i = asynccnt; i--; )
1280 if (asyncs [i]->sent)
1281 {
1282 asyncs [i]->sent = 0;
1283 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1284 }
1285 }
1286#endif
506} 1287}
1288
1289/*****************************************************************************/
507 1290
508static void 1291static void
509downheap (WT *heap, int N, int k)
510{
511 WT w = heap [k];
512
513 while (k < (N >> 1))
514 {
515 int j = k << 1;
516
517 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
518 ++j;
519
520 if (w->at <= heap [j]->at)
521 break;
522
523 heap [k] = heap [j];
524 ((W)heap [k])->active = k + 1;
525 k = j;
526 }
527
528 heap [k] = w;
529 ((W)heap [k])->active = k + 1;
530}
531
532inline void
533adjustheap (WT *heap, int N, int k, ev_tstamp at)
534{
535 ev_tstamp old_at = heap [k]->at;
536 heap [k]->at = at;
537
538 if (old_at < at)
539 downheap (heap, N, k);
540 else
541 upheap (heap, k);
542}
543
544/*****************************************************************************/
545
546typedef struct
547{
548 WL head;
549 sig_atomic_t volatile gotsig;
550} ANSIG;
551
552static ANSIG *signals;
553static int signalmax;
554
555static int sigpipe [2];
556static sig_atomic_t volatile gotsig;
557static struct ev_io sigev;
558
559static void
560signals_init (ANSIG *base, int count)
561{
562 while (count--)
563 {
564 base->head = 0;
565 base->gotsig = 0;
566
567 ++base;
568 }
569}
570
571static void
572sighandler (int signum) 1292ev_sighandler (int signum)
573{ 1293{
1294#if EV_MULTIPLICITY
1295 EV_P = signals [signum - 1].loop;
1296#endif
1297
574#if WIN32 1298#if _WIN32
575 signal (signum, sighandler); 1299 signal (signum, ev_sighandler);
576#endif 1300#endif
577 1301
578 signals [signum - 1].gotsig = 1; 1302 signals [signum - 1].pending = 1;
579 1303 evpipe_write (EV_A_ &sig_pending);
580 if (!gotsig)
581 {
582 int old_errno = errno;
583 gotsig = 1;
584#ifdef WIN32
585 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
586#else
587 write (sigpipe [1], &signum, 1);
588#endif
589 errno = old_errno;
590 }
591} 1304}
592 1305
593void 1306void noinline
594ev_feed_signal_event (EV_P_ int signum) 1307ev_feed_signal_event (EV_P_ int signum)
595{ 1308{
596 WL w; 1309 WL w;
597 1310
1311 if (expect_false (signum <= 0 || signum > EV_NSIG))
1312 return;
1313
1314 --signum;
1315
598#if EV_MULTIPLICITY 1316#if EV_MULTIPLICITY
599 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1317 /* it is permissible to try to feed a signal to the wrong loop */
600#endif 1318 /* or, likely more useful, feeding a signal nobody is waiting for */
601 1319
602 --signum; 1320 if (expect_false (signals [signum].loop != EV_A))
603
604 if (signum < 0 || signum >= signalmax)
605 return; 1321 return;
1322#endif
606 1323
607 signals [signum].gotsig = 0; 1324 signals [signum].pending = 0;
608 1325
609 for (w = signals [signum].head; w; w = w->next) 1326 for (w = signals [signum].head; w; w = w->next)
610 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1327 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
611} 1328}
612 1329
1330#if EV_USE_SIGNALFD
613static void 1331static void
614sigcb (EV_P_ struct ev_io *iow, int revents) 1332sigfdcb (EV_P_ ev_io *iow, int revents)
615{ 1333{
616 int signum; 1334 struct signalfd_siginfo si[2], *sip; /* these structs are big */
617 1335
618#ifdef WIN32 1336 for (;;)
619 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1337 {
620#else 1338 ssize_t res = read (sigfd, si, sizeof (si));
621 read (sigpipe [0], &revents, 1);
622#endif
623 gotsig = 0;
624 1339
625 for (signum = signalmax; signum--; ) 1340 /* not ISO-C, as res might be -1, but works with SuS */
626 if (signals [signum].gotsig) 1341 for (sip = si; (char *)sip < (char *)si + res; ++sip)
627 ev_feed_signal_event (EV_A_ signum + 1); 1342 ev_feed_signal_event (EV_A_ sip->ssi_signo);
628}
629 1343
630static void 1344 if (res < (ssize_t)sizeof (si))
631siginit (EV_P) 1345 break;
632{ 1346 }
633#ifndef WIN32
634 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
635 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
636
637 /* rather than sort out wether we really need nb, set it */
638 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
639 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
640#endif
641
642 ev_io_set (&sigev, sigpipe [0], EV_READ);
643 ev_io_start (EV_A_ &sigev);
644 ev_unref (EV_A); /* child watcher should not keep loop alive */
645} 1347}
1348#endif
646 1349
647/*****************************************************************************/ 1350/*****************************************************************************/
648 1351
649static struct ev_child *childs [PID_HASHSIZE]; 1352static WL childs [EV_PID_HASHSIZE];
650 1353
651#ifndef WIN32 1354#ifndef _WIN32
652 1355
653static struct ev_signal childev; 1356static ev_signal childev;
1357
1358#ifndef WIFCONTINUED
1359# define WIFCONTINUED(status) 0
1360#endif
1361
1362/* handle a single child status event */
1363inline_speed void
1364child_reap (EV_P_ int chain, int pid, int status)
1365{
1366 ev_child *w;
1367 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1368
1369 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1370 {
1371 if ((w->pid == pid || !w->pid)
1372 && (!traced || (w->flags & 1)))
1373 {
1374 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1375 w->rpid = pid;
1376 w->rstatus = status;
1377 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1378 }
1379 }
1380}
654 1381
655#ifndef WCONTINUED 1382#ifndef WCONTINUED
656# define WCONTINUED 0 1383# define WCONTINUED 0
657#endif 1384#endif
658 1385
1386/* called on sigchld etc., calls waitpid */
659static void 1387static void
660child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
661{
662 struct ev_child *w;
663
664 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
665 if (w->pid == pid || !w->pid)
666 {
667 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
668 w->rpid = pid;
669 w->rstatus = status;
670 ev_feed_event (EV_A_ (W)w, EV_CHILD);
671 }
672}
673
674static void
675childcb (EV_P_ struct ev_signal *sw, int revents) 1388childcb (EV_P_ ev_signal *sw, int revents)
676{ 1389{
677 int pid, status; 1390 int pid, status;
678 1391
1392 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
679 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1393 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
680 { 1394 if (!WCONTINUED
1395 || errno != EINVAL
1396 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1397 return;
1398
681 /* make sure we are called again until all childs have been reaped */ 1399 /* make sure we are called again until all children have been reaped */
1400 /* we need to do it this way so that the callback gets called before we continue */
682 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1401 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
683 1402
684 child_reap (EV_A_ sw, pid, pid, status); 1403 child_reap (EV_A_ pid, pid, status);
1404 if (EV_PID_HASHSIZE > 1)
685 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1405 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
686 }
687} 1406}
688 1407
689#endif 1408#endif
690 1409
691/*****************************************************************************/ 1410/*****************************************************************************/
692 1411
1412#if EV_USE_PORT
1413# include "ev_port.c"
1414#endif
693#if EV_USE_KQUEUE 1415#if EV_USE_KQUEUE
694# include "ev_kqueue.c" 1416# include "ev_kqueue.c"
695#endif 1417#endif
696#if EV_USE_EPOLL 1418#if EV_USE_EPOLL
697# include "ev_epoll.c" 1419# include "ev_epoll.c"
… …
714{ 1436{
715 return EV_VERSION_MINOR; 1437 return EV_VERSION_MINOR;
716} 1438}
717 1439
718/* return true if we are running with elevated privileges and should ignore env variables */ 1440/* return true if we are running with elevated privileges and should ignore env variables */
719static int 1441int inline_size
720enable_secure (void) 1442enable_secure (void)
721{ 1443{
722#ifdef WIN32 1444#ifdef _WIN32
723 return 0; 1445 return 0;
724#else 1446#else
725 return getuid () != geteuid () 1447 return getuid () != geteuid ()
726 || getgid () != getegid (); 1448 || getgid () != getegid ();
727#endif 1449#endif
728} 1450}
729 1451
730int 1452unsigned int
731ev_method (EV_P) 1453ev_supported_backends (void)
732{ 1454{
733 return method; 1455 unsigned int flags = 0;
734}
735 1456
736static void 1457 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
737loop_init (EV_P_ int methods) 1458 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1459 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1460 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1461 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1462
1463 return flags;
1464}
1465
1466unsigned int
1467ev_recommended_backends (void)
738{ 1468{
739 if (!method) 1469 unsigned int flags = ev_supported_backends ();
1470
1471#ifndef __NetBSD__
1472 /* kqueue is borked on everything but netbsd apparently */
1473 /* it usually doesn't work correctly on anything but sockets and pipes */
1474 flags &= ~EVBACKEND_KQUEUE;
1475#endif
1476#ifdef __APPLE__
1477 /* only select works correctly on that "unix-certified" platform */
1478 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1479 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1480#endif
1481
1482 return flags;
1483}
1484
1485unsigned int
1486ev_embeddable_backends (void)
1487{
1488 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1489
1490 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1491 /* please fix it and tell me how to detect the fix */
1492 flags &= ~EVBACKEND_EPOLL;
1493
1494 return flags;
1495}
1496
1497unsigned int
1498ev_backend (EV_P)
1499{
1500 return backend;
1501}
1502
1503#if EV_MINIMAL < 2
1504unsigned int
1505ev_loop_count (EV_P)
1506{
1507 return loop_count;
1508}
1509
1510unsigned int
1511ev_loop_depth (EV_P)
1512{
1513 return loop_depth;
1514}
1515
1516void
1517ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1518{
1519 io_blocktime = interval;
1520}
1521
1522void
1523ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1524{
1525 timeout_blocktime = interval;
1526}
1527
1528void
1529ev_set_userdata (EV_P_ void *data)
1530{
1531 userdata = data;
1532}
1533
1534void *
1535ev_userdata (EV_P)
1536{
1537 return userdata;
1538}
1539
1540void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1541{
1542 invoke_cb = invoke_pending_cb;
1543}
1544
1545void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1546{
1547 release_cb = release;
1548 acquire_cb = acquire;
1549}
1550#endif
1551
1552/* initialise a loop structure, must be zero-initialised */
1553static void noinline
1554loop_init (EV_P_ unsigned int flags)
1555{
1556 if (!backend)
740 { 1557 {
1558#if EV_USE_REALTIME
1559 if (!have_realtime)
1560 {
1561 struct timespec ts;
1562
1563 if (!clock_gettime (CLOCK_REALTIME, &ts))
1564 have_realtime = 1;
1565 }
1566#endif
1567
741#if EV_USE_MONOTONIC 1568#if EV_USE_MONOTONIC
1569 if (!have_monotonic)
1570 {
1571 struct timespec ts;
1572
1573 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1574 have_monotonic = 1;
1575 }
1576#endif
1577
1578 /* pid check not overridable via env */
1579#ifndef _WIN32
1580 if (flags & EVFLAG_FORKCHECK)
1581 curpid = getpid ();
1582#endif
1583
1584 if (!(flags & EVFLAG_NOENV)
1585 && !enable_secure ()
1586 && getenv ("LIBEV_FLAGS"))
1587 flags = atoi (getenv ("LIBEV_FLAGS"));
1588
1589 ev_rt_now = ev_time ();
1590 mn_now = get_clock ();
1591 now_floor = mn_now;
1592 rtmn_diff = ev_rt_now - mn_now;
1593#if EV_MINIMAL < 2
1594 invoke_cb = ev_invoke_pending;
1595#endif
1596
1597 io_blocktime = 0.;
1598 timeout_blocktime = 0.;
1599 backend = 0;
1600 backend_fd = -1;
1601 sig_pending = 0;
1602#if EV_ASYNC_ENABLE
1603 async_pending = 0;
1604#endif
1605#if EV_USE_INOTIFY
1606 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1607#endif
1608#if EV_USE_SIGNALFD
1609 sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2;
1610#endif
1611
1612 if (!(flags & 0x0000ffffU))
1613 flags |= ev_recommended_backends ();
1614
1615#if EV_USE_PORT
1616 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1617#endif
1618#if EV_USE_KQUEUE
1619 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1620#endif
1621#if EV_USE_EPOLL
1622 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1623#endif
1624#if EV_USE_POLL
1625 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1626#endif
1627#if EV_USE_SELECT
1628 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1629#endif
1630
1631 ev_prepare_init (&pending_w, pendingcb);
1632
1633 ev_init (&pipe_w, pipecb);
1634 ev_set_priority (&pipe_w, EV_MAXPRI);
1635 }
1636}
1637
1638/* free up a loop structure */
1639static void noinline
1640loop_destroy (EV_P)
1641{
1642 int i;
1643
1644 if (ev_is_active (&pipe_w))
1645 {
1646 /*ev_ref (EV_A);*/
1647 /*ev_io_stop (EV_A_ &pipe_w);*/
1648
1649#if EV_USE_EVENTFD
1650 if (evfd >= 0)
1651 close (evfd);
1652#endif
1653
1654 if (evpipe [0] >= 0)
1655 {
1656 EV_WIN32_CLOSE_FD (evpipe [0]);
1657 EV_WIN32_CLOSE_FD (evpipe [1]);
1658 }
1659 }
1660
1661#if EV_USE_SIGNALFD
1662 if (ev_is_active (&sigfd_w))
1663 close (sigfd);
1664#endif
1665
1666#if EV_USE_INOTIFY
1667 if (fs_fd >= 0)
1668 close (fs_fd);
1669#endif
1670
1671 if (backend_fd >= 0)
1672 close (backend_fd);
1673
1674#if EV_USE_PORT
1675 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1676#endif
1677#if EV_USE_KQUEUE
1678 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1679#endif
1680#if EV_USE_EPOLL
1681 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1682#endif
1683#if EV_USE_POLL
1684 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1685#endif
1686#if EV_USE_SELECT
1687 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1688#endif
1689
1690 for (i = NUMPRI; i--; )
1691 {
1692 array_free (pending, [i]);
1693#if EV_IDLE_ENABLE
1694 array_free (idle, [i]);
1695#endif
1696 }
1697
1698 ev_free (anfds); anfds = 0; anfdmax = 0;
1699
1700 /* have to use the microsoft-never-gets-it-right macro */
1701 array_free (rfeed, EMPTY);
1702 array_free (fdchange, EMPTY);
1703 array_free (timer, EMPTY);
1704#if EV_PERIODIC_ENABLE
1705 array_free (periodic, EMPTY);
1706#endif
1707#if EV_FORK_ENABLE
1708 array_free (fork, EMPTY);
1709#endif
1710 array_free (prepare, EMPTY);
1711 array_free (check, EMPTY);
1712#if EV_ASYNC_ENABLE
1713 array_free (async, EMPTY);
1714#endif
1715
1716 backend = 0;
1717}
1718
1719#if EV_USE_INOTIFY
1720inline_size void infy_fork (EV_P);
1721#endif
1722
1723inline_size void
1724loop_fork (EV_P)
1725{
1726#if EV_USE_PORT
1727 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1728#endif
1729#if EV_USE_KQUEUE
1730 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1731#endif
1732#if EV_USE_EPOLL
1733 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1734#endif
1735#if EV_USE_INOTIFY
1736 infy_fork (EV_A);
1737#endif
1738
1739 if (ev_is_active (&pipe_w))
1740 {
1741 /* this "locks" the handlers against writing to the pipe */
1742 /* while we modify the fd vars */
1743 sig_pending = 1;
1744#if EV_ASYNC_ENABLE
1745 async_pending = 1;
1746#endif
1747
1748 ev_ref (EV_A);
1749 ev_io_stop (EV_A_ &pipe_w);
1750
1751#if EV_USE_EVENTFD
1752 if (evfd >= 0)
1753 close (evfd);
1754#endif
1755
1756 if (evpipe [0] >= 0)
1757 {
1758 EV_WIN32_CLOSE_FD (evpipe [0]);
1759 EV_WIN32_CLOSE_FD (evpipe [1]);
1760 }
1761
1762 evpipe_init (EV_A);
1763 /* now iterate over everything, in case we missed something */
1764 pipecb (EV_A_ &pipe_w, EV_READ);
1765 }
1766
1767 postfork = 0;
1768}
1769
1770#if EV_MULTIPLICITY
1771
1772struct ev_loop *
1773ev_loop_new (unsigned int flags)
1774{
1775 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1776
1777 memset (EV_A, 0, sizeof (struct ev_loop));
1778 loop_init (EV_A_ flags);
1779
1780 if (ev_backend (EV_A))
1781 return EV_A;
1782
1783 return 0;
1784}
1785
1786void
1787ev_loop_destroy (EV_P)
1788{
1789 loop_destroy (EV_A);
1790 ev_free (loop);
1791}
1792
1793void
1794ev_loop_fork (EV_P)
1795{
1796 postfork = 1; /* must be in line with ev_default_fork */
1797}
1798#endif /* multiplicity */
1799
1800#if EV_VERIFY
1801static void noinline
1802verify_watcher (EV_P_ W w)
1803{
1804 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1805
1806 if (w->pending)
1807 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1808}
1809
1810static void noinline
1811verify_heap (EV_P_ ANHE *heap, int N)
1812{
1813 int i;
1814
1815 for (i = HEAP0; i < N + HEAP0; ++i)
1816 {
1817 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1818 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1819 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1820
1821 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1822 }
1823}
1824
1825static void noinline
1826array_verify (EV_P_ W *ws, int cnt)
1827{
1828 while (cnt--)
1829 {
1830 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1831 verify_watcher (EV_A_ ws [cnt]);
1832 }
1833}
1834#endif
1835
1836#if EV_MINIMAL < 2
1837void
1838ev_loop_verify (EV_P)
1839{
1840#if EV_VERIFY
1841 int i;
1842 WL w;
1843
1844 assert (activecnt >= -1);
1845
1846 assert (fdchangemax >= fdchangecnt);
1847 for (i = 0; i < fdchangecnt; ++i)
1848 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1849
1850 assert (anfdmax >= 0);
1851 for (i = 0; i < anfdmax; ++i)
1852 for (w = anfds [i].head; w; w = w->next)
742 { 1853 {
743 struct timespec ts; 1854 verify_watcher (EV_A_ (W)w);
744 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1855 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
745 have_monotonic = 1; 1856 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
746 } 1857 }
747#endif
748 1858
749 ev_rt_now = ev_time (); 1859 assert (timermax >= timercnt);
750 mn_now = get_clock (); 1860 verify_heap (EV_A_ timers, timercnt);
751 now_floor = mn_now;
752 rtmn_diff = ev_rt_now - mn_now;
753 1861
754 if (methods == EVMETHOD_AUTO) 1862#if EV_PERIODIC_ENABLE
755 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1863 assert (periodicmax >= periodiccnt);
756 methods = atoi (getenv ("LIBEV_METHODS")); 1864 verify_heap (EV_A_ periodics, periodiccnt);
757 else
758 methods = EVMETHOD_ANY;
759
760 method = 0;
761#if EV_USE_WIN32
762 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
763#endif
764#if EV_USE_KQUEUE
765 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
766#endif
767#if EV_USE_EPOLL
768 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
769#endif
770#if EV_USE_POLL
771 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
772#endif
773#if EV_USE_SELECT
774 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
775#endif
776
777 ev_init (&sigev, sigcb);
778 ev_set_priority (&sigev, EV_MAXPRI);
779 }
780}
781
782void
783loop_destroy (EV_P)
784{
785 int i;
786
787#if EV_USE_WIN32
788 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
789#endif
790#if EV_USE_KQUEUE
791 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
792#endif
793#if EV_USE_EPOLL
794 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
795#endif
796#if EV_USE_POLL
797 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
798#endif
799#if EV_USE_SELECT
800 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
801#endif 1865#endif
802 1866
803 for (i = NUMPRI; i--; ) 1867 for (i = NUMPRI; i--; )
804 array_free (pending, [i]); 1868 {
1869 assert (pendingmax [i] >= pendingcnt [i]);
1870#if EV_IDLE_ENABLE
1871 assert (idleall >= 0);
1872 assert (idlemax [i] >= idlecnt [i]);
1873 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1874#endif
1875 }
805 1876
806 /* have to use the microsoft-never-gets-it-right macro */ 1877#if EV_FORK_ENABLE
807 array_free_microshit (fdchange); 1878 assert (forkmax >= forkcnt);
808 array_free_microshit (timer); 1879 array_verify (EV_A_ (W *)forks, forkcnt);
809#if EV_PERIODICS 1880#endif
810 array_free_microshit (periodic); 1881
1882#if EV_ASYNC_ENABLE
1883 assert (asyncmax >= asynccnt);
1884 array_verify (EV_A_ (W *)asyncs, asynccnt);
1885#endif
1886
1887 assert (preparemax >= preparecnt);
1888 array_verify (EV_A_ (W *)prepares, preparecnt);
1889
1890 assert (checkmax >= checkcnt);
1891 array_verify (EV_A_ (W *)checks, checkcnt);
1892
1893# if 0
1894 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1895 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
811#endif 1896# endif
812 array_free_microshit (idle);
813 array_free_microshit (prepare);
814 array_free_microshit (check);
815
816 method = 0;
817}
818
819static void
820loop_fork (EV_P)
821{
822#if EV_USE_EPOLL
823 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
824#endif 1897#endif
825#if EV_USE_KQUEUE
826 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
827#endif
828
829 if (ev_is_active (&sigev))
830 {
831 /* default loop */
832
833 ev_ref (EV_A);
834 ev_io_stop (EV_A_ &sigev);
835 close (sigpipe [0]);
836 close (sigpipe [1]);
837
838 while (pipe (sigpipe))
839 syserr ("(libev) error creating pipe");
840
841 siginit (EV_A);
842 }
843
844 postfork = 0;
845} 1898}
1899#endif
846 1900
847#if EV_MULTIPLICITY 1901#if EV_MULTIPLICITY
848struct ev_loop * 1902struct ev_loop *
849ev_loop_new (int methods) 1903ev_default_loop_init (unsigned int flags)
850{
851 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
852
853 memset (loop, 0, sizeof (struct ev_loop));
854
855 loop_init (EV_A_ methods);
856
857 if (ev_method (EV_A))
858 return loop;
859
860 return 0;
861}
862
863void
864ev_loop_destroy (EV_P)
865{
866 loop_destroy (EV_A);
867 ev_free (loop);
868}
869
870void
871ev_loop_fork (EV_P)
872{
873 postfork = 1;
874}
875
876#endif
877
878#if EV_MULTIPLICITY
879struct ev_loop *
880#else 1904#else
881int 1905int
1906ev_default_loop (unsigned int flags)
882#endif 1907#endif
883ev_default_loop (int methods)
884{ 1908{
885 if (sigpipe [0] == sigpipe [1])
886 if (pipe (sigpipe))
887 return 0;
888
889 if (!default_loop) 1909 if (!ev_default_loop_ptr)
890 { 1910 {
891#if EV_MULTIPLICITY 1911#if EV_MULTIPLICITY
892 struct ev_loop *loop = default_loop = &default_loop_struct; 1912 EV_P = ev_default_loop_ptr = &default_loop_struct;
893#else 1913#else
894 default_loop = 1; 1914 ev_default_loop_ptr = 1;
895#endif 1915#endif
896 1916
897 loop_init (EV_A_ methods); 1917 loop_init (EV_A_ flags);
898 1918
899 if (ev_method (EV_A)) 1919 if (ev_backend (EV_A))
900 { 1920 {
901 siginit (EV_A);
902
903#ifndef WIN32 1921#ifndef _WIN32
904 ev_signal_init (&childev, childcb, SIGCHLD); 1922 ev_signal_init (&childev, childcb, SIGCHLD);
905 ev_set_priority (&childev, EV_MAXPRI); 1923 ev_set_priority (&childev, EV_MAXPRI);
906 ev_signal_start (EV_A_ &childev); 1924 ev_signal_start (EV_A_ &childev);
907 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1925 ev_unref (EV_A); /* child watcher should not keep loop alive */
908#endif 1926#endif
909 } 1927 }
910 else 1928 else
911 default_loop = 0; 1929 ev_default_loop_ptr = 0;
912 } 1930 }
913 1931
914 return default_loop; 1932 return ev_default_loop_ptr;
915} 1933}
916 1934
917void 1935void
918ev_default_destroy (void) 1936ev_default_destroy (void)
919{ 1937{
920#if EV_MULTIPLICITY 1938#if EV_MULTIPLICITY
921 struct ev_loop *loop = default_loop; 1939 EV_P = ev_default_loop_ptr;
922#endif 1940#endif
923 1941
1942 ev_default_loop_ptr = 0;
1943
924#ifndef WIN32 1944#ifndef _WIN32
925 ev_ref (EV_A); /* child watcher */ 1945 ev_ref (EV_A); /* child watcher */
926 ev_signal_stop (EV_A_ &childev); 1946 ev_signal_stop (EV_A_ &childev);
927#endif 1947#endif
928 1948
929 ev_ref (EV_A); /* signal watcher */
930 ev_io_stop (EV_A_ &sigev);
931
932 close (sigpipe [0]); sigpipe [0] = 0;
933 close (sigpipe [1]); sigpipe [1] = 0;
934
935 loop_destroy (EV_A); 1949 loop_destroy (EV_A);
936} 1950}
937 1951
938void 1952void
939ev_default_fork (void) 1953ev_default_fork (void)
940{ 1954{
941#if EV_MULTIPLICITY 1955#if EV_MULTIPLICITY
942 struct ev_loop *loop = default_loop; 1956 EV_P = ev_default_loop_ptr;
943#endif 1957#endif
944 1958
945 if (method) 1959 postfork = 1; /* must be in line with ev_loop_fork */
946 postfork = 1;
947} 1960}
948 1961
949/*****************************************************************************/ 1962/*****************************************************************************/
950 1963
951static int 1964void
952any_pending (EV_P) 1965ev_invoke (EV_P_ void *w, int revents)
1966{
1967 EV_CB_INVOKE ((W)w, revents);
1968}
1969
1970unsigned int
1971ev_pending_count (EV_P)
953{ 1972{
954 int pri; 1973 int pri;
1974 unsigned int count = 0;
955 1975
956 for (pri = NUMPRI; pri--; ) 1976 for (pri = NUMPRI; pri--; )
957 if (pendingcnt [pri]) 1977 count += pendingcnt [pri];
958 return 1;
959 1978
960 return 0; 1979 return count;
961} 1980}
962 1981
963static void 1982void noinline
964call_pending (EV_P) 1983ev_invoke_pending (EV_P)
965{ 1984{
966 int pri; 1985 int pri;
967 1986
968 for (pri = NUMPRI; pri--; ) 1987 for (pri = NUMPRI; pri--; )
969 while (pendingcnt [pri]) 1988 while (pendingcnt [pri])
970 { 1989 {
971 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1990 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
972 1991
973 if (p->w) 1992 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
974 { 1993 /* ^ this is no longer true, as pending_w could be here */
1994
975 p->w->pending = 0; 1995 p->w->pending = 0;
976 EV_CB_INVOKE (p->w, p->events); 1996 EV_CB_INVOKE (p->w, p->events);
977 } 1997 EV_FREQUENT_CHECK;
978 } 1998 }
979} 1999}
980 2000
981static void 2001#if EV_IDLE_ENABLE
2002/* make idle watchers pending. this handles the "call-idle */
2003/* only when higher priorities are idle" logic */
2004inline_size void
2005idle_reify (EV_P)
2006{
2007 if (expect_false (idleall))
2008 {
2009 int pri;
2010
2011 for (pri = NUMPRI; pri--; )
2012 {
2013 if (pendingcnt [pri])
2014 break;
2015
2016 if (idlecnt [pri])
2017 {
2018 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2019 break;
2020 }
2021 }
2022 }
2023}
2024#endif
2025
2026/* make timers pending */
2027inline_size void
982timers_reify (EV_P) 2028timers_reify (EV_P)
983{ 2029{
2030 EV_FREQUENT_CHECK;
2031
984 while (timercnt && ((WT)timers [0])->at <= mn_now) 2032 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
985 { 2033 {
986 struct ev_timer *w = timers [0]; 2034 do
987
988 assert (("inactive timer on timer heap detected", ev_is_active (w)));
989
990 /* first reschedule or stop timer */
991 if (w->repeat)
992 { 2035 {
2036 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2037
2038 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2039
2040 /* first reschedule or stop timer */
2041 if (w->repeat)
2042 {
2043 ev_at (w) += w->repeat;
2044 if (ev_at (w) < mn_now)
2045 ev_at (w) = mn_now;
2046
993 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2047 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
994 2048
995 ((WT)w)->at += w->repeat; 2049 ANHE_at_cache (timers [HEAP0]);
996 if (((WT)w)->at < mn_now)
997 ((WT)w)->at = mn_now;
998
999 downheap ((WT *)timers, timercnt, 0); 2050 downheap (timers, timercnt, HEAP0);
2051 }
2052 else
2053 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2054
2055 EV_FREQUENT_CHECK;
2056 feed_reverse (EV_A_ (W)w);
1000 } 2057 }
1001 else 2058 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1002 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1003 2059
1004 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2060 feed_reverse_done (EV_A_ EV_TIMEOUT);
1005 } 2061 }
1006} 2062}
1007 2063
1008#if EV_PERIODICS 2064#if EV_PERIODIC_ENABLE
1009static void 2065/* make periodics pending */
2066inline_size void
1010periodics_reify (EV_P) 2067periodics_reify (EV_P)
1011{ 2068{
2069 EV_FREQUENT_CHECK;
2070
1012 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2071 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1013 { 2072 {
1014 struct ev_periodic *w = periodics [0]; 2073 int feed_count = 0;
1015 2074
2075 do
2076 {
2077 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2078
1016 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2079 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1017 2080
1018 /* first reschedule or stop timer */ 2081 /* first reschedule or stop timer */
2082 if (w->reschedule_cb)
2083 {
2084 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2085
2086 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2087
2088 ANHE_at_cache (periodics [HEAP0]);
2089 downheap (periodics, periodiccnt, HEAP0);
2090 }
2091 else if (w->interval)
2092 {
2093 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2094 /* if next trigger time is not sufficiently in the future, put it there */
2095 /* this might happen because of floating point inexactness */
2096 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2097 {
2098 ev_at (w) += w->interval;
2099
2100 /* if interval is unreasonably low we might still have a time in the past */
2101 /* so correct this. this will make the periodic very inexact, but the user */
2102 /* has effectively asked to get triggered more often than possible */
2103 if (ev_at (w) < ev_rt_now)
2104 ev_at (w) = ev_rt_now;
2105 }
2106
2107 ANHE_at_cache (periodics [HEAP0]);
2108 downheap (periodics, periodiccnt, HEAP0);
2109 }
2110 else
2111 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2112
2113 EV_FREQUENT_CHECK;
2114 feed_reverse (EV_A_ (W)w);
2115 }
2116 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2117
2118 feed_reverse_done (EV_A_ EV_PERIODIC);
2119 }
2120}
2121
2122/* simply recalculate all periodics */
2123/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2124static void noinline
2125periodics_reschedule (EV_P)
2126{
2127 int i;
2128
2129 /* adjust periodics after time jump */
2130 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2131 {
2132 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2133
1019 if (w->reschedule_cb) 2134 if (w->reschedule_cb)
2135 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2136 else if (w->interval)
2137 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2138
2139 ANHE_at_cache (periodics [i]);
2140 }
2141
2142 reheap (periodics, periodiccnt);
2143}
2144#endif
2145
2146/* adjust all timers by a given offset */
2147static void noinline
2148timers_reschedule (EV_P_ ev_tstamp adjust)
2149{
2150 int i;
2151
2152 for (i = 0; i < timercnt; ++i)
2153 {
2154 ANHE *he = timers + i + HEAP0;
2155 ANHE_w (*he)->at += adjust;
2156 ANHE_at_cache (*he);
2157 }
2158}
2159
2160/* fetch new monotonic and realtime times from the kernel */
2161/* also detetc if there was a timejump, and act accordingly */
2162inline_speed void
2163time_update (EV_P_ ev_tstamp max_block)
2164{
2165#if EV_USE_MONOTONIC
2166 if (expect_true (have_monotonic))
2167 {
2168 int i;
2169 ev_tstamp odiff = rtmn_diff;
2170
2171 mn_now = get_clock ();
2172
2173 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2174 /* interpolate in the meantime */
2175 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1020 { 2176 {
1021 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2177 ev_rt_now = rtmn_diff + mn_now;
1022 2178 return;
1023 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1024 downheap ((WT *)periodics, periodiccnt, 0);
1025 } 2179 }
1026 else if (w->interval)
1027 {
1028 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1029 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1030 downheap ((WT *)periodics, periodiccnt, 0);
1031 }
1032 else
1033 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1034 2180
1035 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1036 }
1037}
1038
1039static void
1040periodics_reschedule (EV_P)
1041{
1042 int i;
1043
1044 /* adjust periodics after time jump */
1045 for (i = 0; i < periodiccnt; ++i)
1046 {
1047 struct ev_periodic *w = periodics [i];
1048
1049 if (w->reschedule_cb)
1050 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1051 else if (w->interval)
1052 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1053 }
1054
1055 /* now rebuild the heap */
1056 for (i = periodiccnt >> 1; i--; )
1057 downheap ((WT *)periodics, periodiccnt, i);
1058}
1059#endif
1060
1061inline int
1062time_update_monotonic (EV_P)
1063{
1064 mn_now = get_clock ();
1065
1066 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1067 {
1068 ev_rt_now = rtmn_diff + mn_now;
1069 return 0;
1070 }
1071 else
1072 {
1073 now_floor = mn_now; 2181 now_floor = mn_now;
1074 ev_rt_now = ev_time (); 2182 ev_rt_now = ev_time ();
1075 return 1;
1076 }
1077}
1078 2183
1079static void 2184 /* loop a few times, before making important decisions.
1080time_update (EV_P) 2185 * on the choice of "4": one iteration isn't enough,
1081{ 2186 * in case we get preempted during the calls to
1082 int i; 2187 * ev_time and get_clock. a second call is almost guaranteed
1083 2188 * to succeed in that case, though. and looping a few more times
1084#if EV_USE_MONOTONIC 2189 * doesn't hurt either as we only do this on time-jumps or
1085 if (expect_true (have_monotonic)) 2190 * in the unlikely event of having been preempted here.
1086 { 2191 */
1087 if (time_update_monotonic (EV_A)) 2192 for (i = 4; --i; )
1088 { 2193 {
1089 ev_tstamp odiff = rtmn_diff;
1090
1091 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1092 {
1093 rtmn_diff = ev_rt_now - mn_now; 2194 rtmn_diff = ev_rt_now - mn_now;
1094 2195
1095 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2196 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1096 return; /* all is well */ 2197 return; /* all is well */
1097 2198
1098 ev_rt_now = ev_time (); 2199 ev_rt_now = ev_time ();
1099 mn_now = get_clock (); 2200 mn_now = get_clock ();
1100 now_floor = mn_now; 2201 now_floor = mn_now;
1101 } 2202 }
1102 2203
2204 /* no timer adjustment, as the monotonic clock doesn't jump */
2205 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1103# if EV_PERIODICS 2206# if EV_PERIODIC_ENABLE
2207 periodics_reschedule (EV_A);
2208# endif
2209 }
2210 else
2211#endif
2212 {
2213 ev_rt_now = ev_time ();
2214
2215 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2216 {
2217 /* adjust timers. this is easy, as the offset is the same for all of them */
2218 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2219#if EV_PERIODIC_ENABLE
1104 periodics_reschedule (EV_A); 2220 periodics_reschedule (EV_A);
1105# endif 2221#endif
1106 /* no timer adjustment, as the monotonic clock doesn't jump */
1107 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1108 } 2222 }
1109 }
1110 else
1111#endif
1112 {
1113 ev_rt_now = ev_time ();
1114
1115 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1116 {
1117#if EV_PERIODICS
1118 periodics_reschedule (EV_A);
1119#endif
1120
1121 /* adjust timers. this is easy, as the offset is the same for all */
1122 for (i = 0; i < timercnt; ++i)
1123 ((WT)timers [i])->at += ev_rt_now - mn_now;
1124 }
1125 2223
1126 mn_now = ev_rt_now; 2224 mn_now = ev_rt_now;
1127 } 2225 }
1128} 2226}
1129 2227
1130void 2228void
1131ev_ref (EV_P)
1132{
1133 ++activecnt;
1134}
1135
1136void
1137ev_unref (EV_P)
1138{
1139 --activecnt;
1140}
1141
1142static int loop_done;
1143
1144void
1145ev_loop (EV_P_ int flags) 2229ev_loop (EV_P_ int flags)
1146{ 2230{
1147 double block; 2231#if EV_MINIMAL < 2
1148 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2232 ++loop_depth;
2233#endif
2234
2235 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2236
2237 loop_done = EVUNLOOP_CANCEL;
2238
2239 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1149 2240
1150 do 2241 do
1151 { 2242 {
2243#if EV_VERIFY >= 2
2244 ev_loop_verify (EV_A);
2245#endif
2246
2247#ifndef _WIN32
2248 if (expect_false (curpid)) /* penalise the forking check even more */
2249 if (expect_false (getpid () != curpid))
2250 {
2251 curpid = getpid ();
2252 postfork = 1;
2253 }
2254#endif
2255
2256#if EV_FORK_ENABLE
2257 /* we might have forked, so queue fork handlers */
2258 if (expect_false (postfork))
2259 if (forkcnt)
2260 {
2261 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2262 EV_INVOKE_PENDING;
2263 }
2264#endif
2265
1152 /* queue check watchers (and execute them) */ 2266 /* queue prepare watchers (and execute them) */
1153 if (expect_false (preparecnt)) 2267 if (expect_false (preparecnt))
1154 { 2268 {
1155 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2269 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1156 call_pending (EV_A); 2270 EV_INVOKE_PENDING;
1157 } 2271 }
2272
2273 if (expect_false (loop_done))
2274 break;
1158 2275
1159 /* we might have forked, so reify kernel state if necessary */ 2276 /* we might have forked, so reify kernel state if necessary */
1160 if (expect_false (postfork)) 2277 if (expect_false (postfork))
1161 loop_fork (EV_A); 2278 loop_fork (EV_A);
1162 2279
1163 /* update fd-related kernel structures */ 2280 /* update fd-related kernel structures */
1164 fd_reify (EV_A); 2281 fd_reify (EV_A);
1165 2282
1166 /* calculate blocking time */ 2283 /* calculate blocking time */
2284 {
2285 ev_tstamp waittime = 0.;
2286 ev_tstamp sleeptime = 0.;
1167 2287
1168 /* we only need this for !monotonic clock or timers, but as we basically 2288 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1169 always have timers, we just calculate it always */
1170#if EV_USE_MONOTONIC
1171 if (expect_true (have_monotonic))
1172 time_update_monotonic (EV_A);
1173 else
1174#endif
1175 { 2289 {
1176 ev_rt_now = ev_time (); 2290 /* remember old timestamp for io_blocktime calculation */
1177 mn_now = ev_rt_now; 2291 ev_tstamp prev_mn_now = mn_now;
1178 }
1179 2292
1180 if (flags & EVLOOP_NONBLOCK || idlecnt) 2293 /* update time to cancel out callback processing overhead */
1181 block = 0.; 2294 time_update (EV_A_ 1e100);
1182 else 2295
1183 {
1184 block = MAX_BLOCKTIME; 2296 waittime = MAX_BLOCKTIME;
1185 2297
1186 if (timercnt) 2298 if (timercnt)
1187 { 2299 {
1188 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2300 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1189 if (block > to) block = to; 2301 if (waittime > to) waittime = to;
1190 } 2302 }
1191 2303
1192#if EV_PERIODICS 2304#if EV_PERIODIC_ENABLE
1193 if (periodiccnt) 2305 if (periodiccnt)
1194 { 2306 {
1195 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2307 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1196 if (block > to) block = to; 2308 if (waittime > to) waittime = to;
1197 } 2309 }
1198#endif 2310#endif
1199 2311
1200 if (block < 0.) block = 0.; 2312 /* don't let timeouts decrease the waittime below timeout_blocktime */
2313 if (expect_false (waittime < timeout_blocktime))
2314 waittime = timeout_blocktime;
2315
2316 /* extra check because io_blocktime is commonly 0 */
2317 if (expect_false (io_blocktime))
2318 {
2319 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2320
2321 if (sleeptime > waittime - backend_fudge)
2322 sleeptime = waittime - backend_fudge;
2323
2324 if (expect_true (sleeptime > 0.))
2325 {
2326 ev_sleep (sleeptime);
2327 waittime -= sleeptime;
2328 }
2329 }
1201 } 2330 }
1202 2331
1203 method_poll (EV_A_ block); 2332#if EV_MINIMAL < 2
2333 ++loop_count;
2334#endif
2335 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2336 backend_poll (EV_A_ waittime);
2337 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1204 2338
1205 /* update ev_rt_now, do magic */ 2339 /* update ev_rt_now, do magic */
1206 time_update (EV_A); 2340 time_update (EV_A_ waittime + sleeptime);
2341 }
1207 2342
1208 /* queue pending timers and reschedule them */ 2343 /* queue pending timers and reschedule them */
1209 timers_reify (EV_A); /* relative timers called last */ 2344 timers_reify (EV_A); /* relative timers called last */
1210#if EV_PERIODICS 2345#if EV_PERIODIC_ENABLE
1211 periodics_reify (EV_A); /* absolute timers called first */ 2346 periodics_reify (EV_A); /* absolute timers called first */
1212#endif 2347#endif
1213 2348
2349#if EV_IDLE_ENABLE
1214 /* queue idle watchers unless io or timers are pending */ 2350 /* queue idle watchers unless other events are pending */
1215 if (idlecnt && !any_pending (EV_A)) 2351 idle_reify (EV_A);
1216 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2352#endif
1217 2353
1218 /* queue check watchers, to be executed first */ 2354 /* queue check watchers, to be executed first */
1219 if (checkcnt) 2355 if (expect_false (checkcnt))
1220 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2356 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1221 2357
1222 call_pending (EV_A); 2358 EV_INVOKE_PENDING;
1223 } 2359 }
1224 while (activecnt && !loop_done); 2360 while (expect_true (
2361 activecnt
2362 && !loop_done
2363 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2364 ));
1225 2365
1226 if (loop_done != 2) 2366 if (loop_done == EVUNLOOP_ONE)
1227 loop_done = 0; 2367 loop_done = EVUNLOOP_CANCEL;
2368
2369#if EV_MINIMAL < 2
2370 --loop_depth;
2371#endif
1228} 2372}
1229 2373
1230void 2374void
1231ev_unloop (EV_P_ int how) 2375ev_unloop (EV_P_ int how)
1232{ 2376{
1233 loop_done = how; 2377 loop_done = how;
1234} 2378}
1235 2379
2380void
2381ev_ref (EV_P)
2382{
2383 ++activecnt;
2384}
2385
2386void
2387ev_unref (EV_P)
2388{
2389 --activecnt;
2390}
2391
2392void
2393ev_now_update (EV_P)
2394{
2395 time_update (EV_A_ 1e100);
2396}
2397
2398void
2399ev_suspend (EV_P)
2400{
2401 ev_now_update (EV_A);
2402}
2403
2404void
2405ev_resume (EV_P)
2406{
2407 ev_tstamp mn_prev = mn_now;
2408
2409 ev_now_update (EV_A);
2410 timers_reschedule (EV_A_ mn_now - mn_prev);
2411#if EV_PERIODIC_ENABLE
2412 /* TODO: really do this? */
2413 periodics_reschedule (EV_A);
2414#endif
2415}
2416
1236/*****************************************************************************/ 2417/*****************************************************************************/
2418/* singly-linked list management, used when the expected list length is short */
1237 2419
1238inline void 2420inline_size void
1239wlist_add (WL *head, WL elem) 2421wlist_add (WL *head, WL elem)
1240{ 2422{
1241 elem->next = *head; 2423 elem->next = *head;
1242 *head = elem; 2424 *head = elem;
1243} 2425}
1244 2426
1245inline void 2427inline_size void
1246wlist_del (WL *head, WL elem) 2428wlist_del (WL *head, WL elem)
1247{ 2429{
1248 while (*head) 2430 while (*head)
1249 { 2431 {
1250 if (*head == elem) 2432 if (expect_true (*head == elem))
1251 { 2433 {
1252 *head = elem->next; 2434 *head = elem->next;
1253 return; 2435 break;
1254 } 2436 }
1255 2437
1256 head = &(*head)->next; 2438 head = &(*head)->next;
1257 } 2439 }
1258} 2440}
1259 2441
2442/* internal, faster, version of ev_clear_pending */
1260inline void 2443inline_speed void
1261ev_clear_pending (EV_P_ W w) 2444clear_pending (EV_P_ W w)
1262{ 2445{
1263 if (w->pending) 2446 if (w->pending)
1264 { 2447 {
1265 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2448 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1266 w->pending = 0; 2449 w->pending = 0;
1267 } 2450 }
1268} 2451}
1269 2452
2453int
2454ev_clear_pending (EV_P_ void *w)
2455{
2456 W w_ = (W)w;
2457 int pending = w_->pending;
2458
2459 if (expect_true (pending))
2460 {
2461 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2462 p->w = (W)&pending_w;
2463 w_->pending = 0;
2464 return p->events;
2465 }
2466 else
2467 return 0;
2468}
2469
1270inline void 2470inline_size void
2471pri_adjust (EV_P_ W w)
2472{
2473 int pri = ev_priority (w);
2474 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2475 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2476 ev_set_priority (w, pri);
2477}
2478
2479inline_speed void
1271ev_start (EV_P_ W w, int active) 2480ev_start (EV_P_ W w, int active)
1272{ 2481{
1273 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2482 pri_adjust (EV_A_ w);
1274 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1275
1276 w->active = active; 2483 w->active = active;
1277 ev_ref (EV_A); 2484 ev_ref (EV_A);
1278} 2485}
1279 2486
1280inline void 2487inline_size void
1281ev_stop (EV_P_ W w) 2488ev_stop (EV_P_ W w)
1282{ 2489{
1283 ev_unref (EV_A); 2490 ev_unref (EV_A);
1284 w->active = 0; 2491 w->active = 0;
1285} 2492}
1286 2493
1287/*****************************************************************************/ 2494/*****************************************************************************/
1288 2495
1289void 2496void noinline
1290ev_io_start (EV_P_ struct ev_io *w) 2497ev_io_start (EV_P_ ev_io *w)
1291{ 2498{
1292 int fd = w->fd; 2499 int fd = w->fd;
1293 2500
2501 if (expect_false (ev_is_active (w)))
2502 return;
2503
2504 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2505 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2506
2507 EV_FREQUENT_CHECK;
2508
2509 ev_start (EV_A_ (W)w, 1);
2510 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2511 wlist_add (&anfds[fd].head, (WL)w);
2512
2513 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2514 w->events &= ~EV__IOFDSET;
2515
2516 EV_FREQUENT_CHECK;
2517}
2518
2519void noinline
2520ev_io_stop (EV_P_ ev_io *w)
2521{
2522 clear_pending (EV_A_ (W)w);
2523 if (expect_false (!ev_is_active (w)))
2524 return;
2525
2526 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2527
2528 EV_FREQUENT_CHECK;
2529
2530 wlist_del (&anfds[w->fd].head, (WL)w);
2531 ev_stop (EV_A_ (W)w);
2532
2533 fd_change (EV_A_ w->fd, 1);
2534
2535 EV_FREQUENT_CHECK;
2536}
2537
2538void noinline
2539ev_timer_start (EV_P_ ev_timer *w)
2540{
2541 if (expect_false (ev_is_active (w)))
2542 return;
2543
2544 ev_at (w) += mn_now;
2545
2546 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2547
2548 EV_FREQUENT_CHECK;
2549
2550 ++timercnt;
2551 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2552 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2553 ANHE_w (timers [ev_active (w)]) = (WT)w;
2554 ANHE_at_cache (timers [ev_active (w)]);
2555 upheap (timers, ev_active (w));
2556
2557 EV_FREQUENT_CHECK;
2558
2559 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2560}
2561
2562void noinline
2563ev_timer_stop (EV_P_ ev_timer *w)
2564{
2565 clear_pending (EV_A_ (W)w);
2566 if (expect_false (!ev_is_active (w)))
2567 return;
2568
2569 EV_FREQUENT_CHECK;
2570
2571 {
2572 int active = ev_active (w);
2573
2574 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2575
2576 --timercnt;
2577
2578 if (expect_true (active < timercnt + HEAP0))
2579 {
2580 timers [active] = timers [timercnt + HEAP0];
2581 adjustheap (timers, timercnt, active);
2582 }
2583 }
2584
2585 EV_FREQUENT_CHECK;
2586
2587 ev_at (w) -= mn_now;
2588
2589 ev_stop (EV_A_ (W)w);
2590}
2591
2592void noinline
2593ev_timer_again (EV_P_ ev_timer *w)
2594{
2595 EV_FREQUENT_CHECK;
2596
1294 if (ev_is_active (w)) 2597 if (ev_is_active (w))
1295 return;
1296
1297 assert (("ev_io_start called with negative fd", fd >= 0));
1298
1299 ev_start (EV_A_ (W)w, 1);
1300 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1301 wlist_add ((WL *)&anfds[fd].head, (WL)w);
1302
1303 fd_change (EV_A_ fd);
1304}
1305
1306void
1307ev_io_stop (EV_P_ struct ev_io *w)
1308{
1309 ev_clear_pending (EV_A_ (W)w);
1310 if (!ev_is_active (w))
1311 return;
1312
1313 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1314
1315 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1316 ev_stop (EV_A_ (W)w);
1317
1318 fd_change (EV_A_ w->fd);
1319}
1320
1321void
1322ev_timer_start (EV_P_ struct ev_timer *w)
1323{
1324 if (ev_is_active (w))
1325 return;
1326
1327 ((WT)w)->at += mn_now;
1328
1329 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1330
1331 ev_start (EV_A_ (W)w, ++timercnt);
1332 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1333 timers [timercnt - 1] = w;
1334 upheap ((WT *)timers, timercnt - 1);
1335
1336 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1337}
1338
1339void
1340ev_timer_stop (EV_P_ struct ev_timer *w)
1341{
1342 ev_clear_pending (EV_A_ (W)w);
1343 if (!ev_is_active (w))
1344 return;
1345
1346 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1347
1348 if (((W)w)->active < timercnt--)
1349 {
1350 timers [((W)w)->active - 1] = timers [timercnt];
1351 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1352 }
1353
1354 ((WT)w)->at -= mn_now;
1355
1356 ev_stop (EV_A_ (W)w);
1357}
1358
1359void
1360ev_timer_again (EV_P_ struct ev_timer *w)
1361{
1362 if (ev_is_active (w))
1363 { 2598 {
1364 if (w->repeat) 2599 if (w->repeat)
1365 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat); 2600 {
2601 ev_at (w) = mn_now + w->repeat;
2602 ANHE_at_cache (timers [ev_active (w)]);
2603 adjustheap (timers, timercnt, ev_active (w));
2604 }
1366 else 2605 else
1367 ev_timer_stop (EV_A_ w); 2606 ev_timer_stop (EV_A_ w);
1368 } 2607 }
1369 else if (w->repeat) 2608 else if (w->repeat)
2609 {
2610 ev_at (w) = w->repeat;
1370 ev_timer_start (EV_A_ w); 2611 ev_timer_start (EV_A_ w);
1371} 2612 }
1372 2613
2614 EV_FREQUENT_CHECK;
2615}
2616
2617ev_tstamp
2618ev_timer_remaining (EV_P_ ev_timer *w)
2619{
2620 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2621}
2622
1373#if EV_PERIODICS 2623#if EV_PERIODIC_ENABLE
1374void 2624void noinline
1375ev_periodic_start (EV_P_ struct ev_periodic *w) 2625ev_periodic_start (EV_P_ ev_periodic *w)
1376{ 2626{
1377 if (ev_is_active (w)) 2627 if (expect_false (ev_is_active (w)))
1378 return; 2628 return;
1379 2629
1380 if (w->reschedule_cb) 2630 if (w->reschedule_cb)
1381 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2631 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1382 else if (w->interval) 2632 else if (w->interval)
1383 { 2633 {
1384 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2634 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1385 /* this formula differs from the one in periodic_reify because we do not always round up */ 2635 /* this formula differs from the one in periodic_reify because we do not always round up */
1386 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2636 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1387 } 2637 }
2638 else
2639 ev_at (w) = w->offset;
1388 2640
2641 EV_FREQUENT_CHECK;
2642
2643 ++periodiccnt;
1389 ev_start (EV_A_ (W)w, ++periodiccnt); 2644 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1390 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2645 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1391 periodics [periodiccnt - 1] = w; 2646 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1392 upheap ((WT *)periodics, periodiccnt - 1); 2647 ANHE_at_cache (periodics [ev_active (w)]);
2648 upheap (periodics, ev_active (w));
1393 2649
2650 EV_FREQUENT_CHECK;
2651
1394 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2652 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1395} 2653}
1396 2654
1397void 2655void noinline
1398ev_periodic_stop (EV_P_ struct ev_periodic *w) 2656ev_periodic_stop (EV_P_ ev_periodic *w)
1399{ 2657{
1400 ev_clear_pending (EV_A_ (W)w); 2658 clear_pending (EV_A_ (W)w);
1401 if (!ev_is_active (w)) 2659 if (expect_false (!ev_is_active (w)))
1402 return; 2660 return;
1403 2661
2662 EV_FREQUENT_CHECK;
2663
2664 {
2665 int active = ev_active (w);
2666
1404 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2667 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1405 2668
1406 if (((W)w)->active < periodiccnt--) 2669 --periodiccnt;
2670
2671 if (expect_true (active < periodiccnt + HEAP0))
1407 { 2672 {
1408 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2673 periodics [active] = periodics [periodiccnt + HEAP0];
1409 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2674 adjustheap (periodics, periodiccnt, active);
1410 } 2675 }
2676 }
2677
2678 EV_FREQUENT_CHECK;
1411 2679
1412 ev_stop (EV_A_ (W)w); 2680 ev_stop (EV_A_ (W)w);
1413} 2681}
1414 2682
1415void 2683void noinline
1416ev_periodic_again (EV_P_ struct ev_periodic *w) 2684ev_periodic_again (EV_P_ ev_periodic *w)
1417{ 2685{
1418 /* TODO: use adjustheap and recalculation */ 2686 /* TODO: use adjustheap and recalculation */
1419 ev_periodic_stop (EV_A_ w); 2687 ev_periodic_stop (EV_A_ w);
1420 ev_periodic_start (EV_A_ w); 2688 ev_periodic_start (EV_A_ w);
1421} 2689}
1422#endif 2690#endif
1423 2691
1424void
1425ev_idle_start (EV_P_ struct ev_idle *w)
1426{
1427 if (ev_is_active (w))
1428 return;
1429
1430 ev_start (EV_A_ (W)w, ++idlecnt);
1431 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1432 idles [idlecnt - 1] = w;
1433}
1434
1435void
1436ev_idle_stop (EV_P_ struct ev_idle *w)
1437{
1438 ev_clear_pending (EV_A_ (W)w);
1439 if (ev_is_active (w))
1440 return;
1441
1442 idles [((W)w)->active - 1] = idles [--idlecnt];
1443 ev_stop (EV_A_ (W)w);
1444}
1445
1446void
1447ev_prepare_start (EV_P_ struct ev_prepare *w)
1448{
1449 if (ev_is_active (w))
1450 return;
1451
1452 ev_start (EV_A_ (W)w, ++preparecnt);
1453 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1454 prepares [preparecnt - 1] = w;
1455}
1456
1457void
1458ev_prepare_stop (EV_P_ struct ev_prepare *w)
1459{
1460 ev_clear_pending (EV_A_ (W)w);
1461 if (ev_is_active (w))
1462 return;
1463
1464 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1465 ev_stop (EV_A_ (W)w);
1466}
1467
1468void
1469ev_check_start (EV_P_ struct ev_check *w)
1470{
1471 if (ev_is_active (w))
1472 return;
1473
1474 ev_start (EV_A_ (W)w, ++checkcnt);
1475 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1476 checks [checkcnt - 1] = w;
1477}
1478
1479void
1480ev_check_stop (EV_P_ struct ev_check *w)
1481{
1482 ev_clear_pending (EV_A_ (W)w);
1483 if (!ev_is_active (w))
1484 return;
1485
1486 checks [((W)w)->active - 1] = checks [--checkcnt];
1487 ev_stop (EV_A_ (W)w);
1488}
1489
1490#ifndef SA_RESTART 2692#ifndef SA_RESTART
1491# define SA_RESTART 0 2693# define SA_RESTART 0
1492#endif 2694#endif
1493 2695
1494void 2696void noinline
1495ev_signal_start (EV_P_ struct ev_signal *w) 2697ev_signal_start (EV_P_ ev_signal *w)
1496{ 2698{
2699 if (expect_false (ev_is_active (w)))
2700 return;
2701
2702 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2703
1497#if EV_MULTIPLICITY 2704#if EV_MULTIPLICITY
1498 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2705 assert (("libev: a signal must not be attached to two different loops",
2706 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2707
2708 signals [w->signum - 1].loop = EV_A;
2709#endif
2710
2711 EV_FREQUENT_CHECK;
2712
2713#if EV_USE_SIGNALFD
2714 if (sigfd == -2)
2715 {
2716 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2717 if (sigfd < 0 && errno == EINVAL)
2718 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2719
2720 if (sigfd >= 0)
2721 {
2722 fd_intern (sigfd); /* doing it twice will not hurt */
2723
2724 sigemptyset (&sigfd_set);
2725
2726 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2727 ev_set_priority (&sigfd_w, EV_MAXPRI);
2728 ev_io_start (EV_A_ &sigfd_w);
2729 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2730 }
2731 }
2732
2733 if (sigfd >= 0)
2734 {
2735 /* TODO: check .head */
2736 sigaddset (&sigfd_set, w->signum);
2737 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2738
2739 signalfd (sigfd, &sigfd_set, 0);
2740 }
2741#endif
2742
2743 ev_start (EV_A_ (W)w, 1);
2744 wlist_add (&signals [w->signum - 1].head, (WL)w);
2745
2746 if (!((WL)w)->next)
2747# if EV_USE_SIGNALFD
2748 if (sigfd < 0) /*TODO*/
1499#endif 2749# endif
1500 if (ev_is_active (w)) 2750 {
2751# if _WIN32
2752 evpipe_init (EV_A);
2753
2754 signal (w->signum, ev_sighandler);
2755# else
2756 struct sigaction sa;
2757
2758 evpipe_init (EV_A);
2759
2760 sa.sa_handler = ev_sighandler;
2761 sigfillset (&sa.sa_mask);
2762 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2763 sigaction (w->signum, &sa, 0);
2764
2765 sigemptyset (&sa.sa_mask);
2766 sigaddset (&sa.sa_mask, w->signum);
2767 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2768#endif
2769 }
2770
2771 EV_FREQUENT_CHECK;
2772}
2773
2774void noinline
2775ev_signal_stop (EV_P_ ev_signal *w)
2776{
2777 clear_pending (EV_A_ (W)w);
2778 if (expect_false (!ev_is_active (w)))
1501 return; 2779 return;
1502 2780
1503 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2781 EV_FREQUENT_CHECK;
2782
2783 wlist_del (&signals [w->signum - 1].head, (WL)w);
2784 ev_stop (EV_A_ (W)w);
2785
2786 if (!signals [w->signum - 1].head)
2787 {
2788#if EV_MULTIPLICITY
2789 signals [w->signum - 1].loop = 0; /* unattach from signal */
2790#endif
2791#if EV_USE_SIGNALFD
2792 if (sigfd >= 0)
2793 {
2794 sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2795 sigdelset (&sigfd_set, w->signum);
2796 signalfd (sigfd, &sigfd_set, 0);
2797 sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2798 /*TODO: maybe unblock signal? */
2799 }
2800 else
2801#endif
2802 signal (w->signum, SIG_DFL);
2803 }
2804
2805 EV_FREQUENT_CHECK;
2806}
2807
2808void
2809ev_child_start (EV_P_ ev_child *w)
2810{
2811#if EV_MULTIPLICITY
2812 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2813#endif
2814 if (expect_false (ev_is_active (w)))
2815 return;
2816
2817 EV_FREQUENT_CHECK;
1504 2818
1505 ev_start (EV_A_ (W)w, 1); 2819 ev_start (EV_A_ (W)w, 1);
1506 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2820 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1507 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1508 2821
1509 if (!((WL)w)->next) 2822 EV_FREQUENT_CHECK;
2823}
2824
2825void
2826ev_child_stop (EV_P_ ev_child *w)
2827{
2828 clear_pending (EV_A_ (W)w);
2829 if (expect_false (!ev_is_active (w)))
2830 return;
2831
2832 EV_FREQUENT_CHECK;
2833
2834 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2835 ev_stop (EV_A_ (W)w);
2836
2837 EV_FREQUENT_CHECK;
2838}
2839
2840#if EV_STAT_ENABLE
2841
2842# ifdef _WIN32
2843# undef lstat
2844# define lstat(a,b) _stati64 (a,b)
2845# endif
2846
2847#define DEF_STAT_INTERVAL 5.0074891
2848#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2849#define MIN_STAT_INTERVAL 0.1074891
2850
2851static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2852
2853#if EV_USE_INOTIFY
2854# define EV_INOTIFY_BUFSIZE 8192
2855
2856static void noinline
2857infy_add (EV_P_ ev_stat *w)
2858{
2859 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2860
2861 if (w->wd < 0)
2862 {
2863 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2864 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2865
2866 /* monitor some parent directory for speedup hints */
2867 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2868 /* but an efficiency issue only */
2869 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2870 {
2871 char path [4096];
2872 strcpy (path, w->path);
2873
2874 do
2875 {
2876 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2877 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2878
2879 char *pend = strrchr (path, '/');
2880
2881 if (!pend || pend == path)
2882 break;
2883
2884 *pend = 0;
2885 w->wd = inotify_add_watch (fs_fd, path, mask);
2886 }
2887 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2888 }
1510 { 2889 }
1511#if WIN32 2890
1512 signal (w->signum, sighandler); 2891 if (w->wd >= 0)
2892 {
2893 struct statfs sfs;
2894
2895 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2896
2897 /* now local changes will be tracked by inotify, but remote changes won't */
2898 /* unless the filesystem is known to be local, we therefore still poll */
2899 /* also do poll on <2.6.25, but with normal frequency */
2900
2901 if (fs_2625 && !statfs (w->path, &sfs))
2902 if (sfs.f_type == 0x1373 /* devfs */
2903 || sfs.f_type == 0xEF53 /* ext2/3 */
2904 || sfs.f_type == 0x3153464a /* jfs */
2905 || sfs.f_type == 0x52654973 /* reiser3 */
2906 || sfs.f_type == 0x01021994 /* tempfs */
2907 || sfs.f_type == 0x58465342 /* xfs */)
2908 return;
2909
2910 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2911 ev_timer_again (EV_A_ &w->timer);
2912 }
2913}
2914
2915static void noinline
2916infy_del (EV_P_ ev_stat *w)
2917{
2918 int slot;
2919 int wd = w->wd;
2920
2921 if (wd < 0)
2922 return;
2923
2924 w->wd = -2;
2925 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2926 wlist_del (&fs_hash [slot].head, (WL)w);
2927
2928 /* remove this watcher, if others are watching it, they will rearm */
2929 inotify_rm_watch (fs_fd, wd);
2930}
2931
2932static void noinline
2933infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2934{
2935 if (slot < 0)
2936 /* overflow, need to check for all hash slots */
2937 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2938 infy_wd (EV_A_ slot, wd, ev);
2939 else
2940 {
2941 WL w_;
2942
2943 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2944 {
2945 ev_stat *w = (ev_stat *)w_;
2946 w_ = w_->next; /* lets us remove this watcher and all before it */
2947
2948 if (w->wd == wd || wd == -1)
2949 {
2950 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2951 {
2952 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2953 w->wd = -1;
2954 infy_add (EV_A_ w); /* re-add, no matter what */
2955 }
2956
2957 stat_timer_cb (EV_A_ &w->timer, 0);
2958 }
2959 }
2960 }
2961}
2962
2963static void
2964infy_cb (EV_P_ ev_io *w, int revents)
2965{
2966 char buf [EV_INOTIFY_BUFSIZE];
2967 struct inotify_event *ev = (struct inotify_event *)buf;
2968 int ofs;
2969 int len = read (fs_fd, buf, sizeof (buf));
2970
2971 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2972 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2973}
2974
2975inline_size void
2976check_2625 (EV_P)
2977{
2978 /* kernels < 2.6.25 are borked
2979 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2980 */
2981 struct utsname buf;
2982 int major, minor, micro;
2983
2984 if (uname (&buf))
2985 return;
2986
2987 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2988 return;
2989
2990 if (major < 2
2991 || (major == 2 && minor < 6)
2992 || (major == 2 && minor == 6 && micro < 25))
2993 return;
2994
2995 fs_2625 = 1;
2996}
2997
2998inline_size int
2999infy_newfd (void)
3000{
3001#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3002 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3003 if (fd >= 0)
3004 return fd;
3005#endif
3006 return inotify_init ();
3007}
3008
3009inline_size void
3010infy_init (EV_P)
3011{
3012 if (fs_fd != -2)
3013 return;
3014
3015 fs_fd = -1;
3016
3017 check_2625 (EV_A);
3018
3019 fs_fd = infy_newfd ();
3020
3021 if (fs_fd >= 0)
3022 {
3023 fd_intern (fs_fd);
3024 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3025 ev_set_priority (&fs_w, EV_MAXPRI);
3026 ev_io_start (EV_A_ &fs_w);
3027 ev_unref (EV_A);
3028 }
3029}
3030
3031inline_size void
3032infy_fork (EV_P)
3033{
3034 int slot;
3035
3036 if (fs_fd < 0)
3037 return;
3038
3039 ev_ref (EV_A);
3040 ev_io_stop (EV_A_ &fs_w);
3041 close (fs_fd);
3042 fs_fd = infy_newfd ();
3043
3044 if (fs_fd >= 0)
3045 {
3046 fd_intern (fs_fd);
3047 ev_io_set (&fs_w, fs_fd, EV_READ);
3048 ev_io_start (EV_A_ &fs_w);
3049 ev_unref (EV_A);
3050 }
3051
3052 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3053 {
3054 WL w_ = fs_hash [slot].head;
3055 fs_hash [slot].head = 0;
3056
3057 while (w_)
3058 {
3059 ev_stat *w = (ev_stat *)w_;
3060 w_ = w_->next; /* lets us add this watcher */
3061
3062 w->wd = -1;
3063
3064 if (fs_fd >= 0)
3065 infy_add (EV_A_ w); /* re-add, no matter what */
3066 else
3067 ev_timer_again (EV_A_ &w->timer);
3068 }
3069 }
3070}
3071
3072#endif
3073
3074#ifdef _WIN32
3075# define EV_LSTAT(p,b) _stati64 (p, b)
1513#else 3076#else
1514 struct sigaction sa; 3077# define EV_LSTAT(p,b) lstat (p, b)
1515 sa.sa_handler = sighandler;
1516 sigfillset (&sa.sa_mask);
1517 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1518 sigaction (w->signum, &sa, 0);
1519#endif 3078#endif
1520 }
1521}
1522 3079
1523void 3080void
1524ev_signal_stop (EV_P_ struct ev_signal *w) 3081ev_stat_stat (EV_P_ ev_stat *w)
1525{ 3082{
1526 ev_clear_pending (EV_A_ (W)w); 3083 if (lstat (w->path, &w->attr) < 0)
1527 if (!ev_is_active (w)) 3084 w->attr.st_nlink = 0;
3085 else if (!w->attr.st_nlink)
3086 w->attr.st_nlink = 1;
3087}
3088
3089static void noinline
3090stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3091{
3092 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3093
3094 /* we copy this here each the time so that */
3095 /* prev has the old value when the callback gets invoked */
3096 w->prev = w->attr;
3097 ev_stat_stat (EV_A_ w);
3098
3099 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3100 if (
3101 w->prev.st_dev != w->attr.st_dev
3102 || w->prev.st_ino != w->attr.st_ino
3103 || w->prev.st_mode != w->attr.st_mode
3104 || w->prev.st_nlink != w->attr.st_nlink
3105 || w->prev.st_uid != w->attr.st_uid
3106 || w->prev.st_gid != w->attr.st_gid
3107 || w->prev.st_rdev != w->attr.st_rdev
3108 || w->prev.st_size != w->attr.st_size
3109 || w->prev.st_atime != w->attr.st_atime
3110 || w->prev.st_mtime != w->attr.st_mtime
3111 || w->prev.st_ctime != w->attr.st_ctime
3112 ) {
3113 #if EV_USE_INOTIFY
3114 if (fs_fd >= 0)
3115 {
3116 infy_del (EV_A_ w);
3117 infy_add (EV_A_ w);
3118 ev_stat_stat (EV_A_ w); /* avoid race... */
3119 }
3120 #endif
3121
3122 ev_feed_event (EV_A_ w, EV_STAT);
3123 }
3124}
3125
3126void
3127ev_stat_start (EV_P_ ev_stat *w)
3128{
3129 if (expect_false (ev_is_active (w)))
1528 return; 3130 return;
1529 3131
1530 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3132 ev_stat_stat (EV_A_ w);
3133
3134 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3135 w->interval = MIN_STAT_INTERVAL;
3136
3137 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3138 ev_set_priority (&w->timer, ev_priority (w));
3139
3140#if EV_USE_INOTIFY
3141 infy_init (EV_A);
3142
3143 if (fs_fd >= 0)
3144 infy_add (EV_A_ w);
3145 else
3146#endif
3147 ev_timer_again (EV_A_ &w->timer);
3148
3149 ev_start (EV_A_ (W)w, 1);
3150
3151 EV_FREQUENT_CHECK;
3152}
3153
3154void
3155ev_stat_stop (EV_P_ ev_stat *w)
3156{
3157 clear_pending (EV_A_ (W)w);
3158 if (expect_false (!ev_is_active (w)))
3159 return;
3160
3161 EV_FREQUENT_CHECK;
3162
3163#if EV_USE_INOTIFY
3164 infy_del (EV_A_ w);
3165#endif
3166 ev_timer_stop (EV_A_ &w->timer);
3167
1531 ev_stop (EV_A_ (W)w); 3168 ev_stop (EV_A_ (W)w);
1532 3169
1533 if (!signals [w->signum - 1].head) 3170 EV_FREQUENT_CHECK;
1534 signal (w->signum, SIG_DFL);
1535} 3171}
3172#endif
1536 3173
3174#if EV_IDLE_ENABLE
1537void 3175void
1538ev_child_start (EV_P_ struct ev_child *w) 3176ev_idle_start (EV_P_ ev_idle *w)
1539{ 3177{
1540#if EV_MULTIPLICITY
1541 assert (("child watchers are only supported in the default loop", loop == default_loop));
1542#endif
1543 if (ev_is_active (w)) 3178 if (expect_false (ev_is_active (w)))
1544 return; 3179 return;
1545 3180
3181 pri_adjust (EV_A_ (W)w);
3182
3183 EV_FREQUENT_CHECK;
3184
3185 {
3186 int active = ++idlecnt [ABSPRI (w)];
3187
3188 ++idleall;
3189 ev_start (EV_A_ (W)w, active);
3190
3191 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3192 idles [ABSPRI (w)][active - 1] = w;
3193 }
3194
3195 EV_FREQUENT_CHECK;
3196}
3197
3198void
3199ev_idle_stop (EV_P_ ev_idle *w)
3200{
3201 clear_pending (EV_A_ (W)w);
3202 if (expect_false (!ev_is_active (w)))
3203 return;
3204
3205 EV_FREQUENT_CHECK;
3206
3207 {
3208 int active = ev_active (w);
3209
3210 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3211 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3212
3213 ev_stop (EV_A_ (W)w);
3214 --idleall;
3215 }
3216
3217 EV_FREQUENT_CHECK;
3218}
3219#endif
3220
3221void
3222ev_prepare_start (EV_P_ ev_prepare *w)
3223{
3224 if (expect_false (ev_is_active (w)))
3225 return;
3226
3227 EV_FREQUENT_CHECK;
3228
3229 ev_start (EV_A_ (W)w, ++preparecnt);
3230 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3231 prepares [preparecnt - 1] = w;
3232
3233 EV_FREQUENT_CHECK;
3234}
3235
3236void
3237ev_prepare_stop (EV_P_ ev_prepare *w)
3238{
3239 clear_pending (EV_A_ (W)w);
3240 if (expect_false (!ev_is_active (w)))
3241 return;
3242
3243 EV_FREQUENT_CHECK;
3244
3245 {
3246 int active = ev_active (w);
3247
3248 prepares [active - 1] = prepares [--preparecnt];
3249 ev_active (prepares [active - 1]) = active;
3250 }
3251
3252 ev_stop (EV_A_ (W)w);
3253
3254 EV_FREQUENT_CHECK;
3255}
3256
3257void
3258ev_check_start (EV_P_ ev_check *w)
3259{
3260 if (expect_false (ev_is_active (w)))
3261 return;
3262
3263 EV_FREQUENT_CHECK;
3264
3265 ev_start (EV_A_ (W)w, ++checkcnt);
3266 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3267 checks [checkcnt - 1] = w;
3268
3269 EV_FREQUENT_CHECK;
3270}
3271
3272void
3273ev_check_stop (EV_P_ ev_check *w)
3274{
3275 clear_pending (EV_A_ (W)w);
3276 if (expect_false (!ev_is_active (w)))
3277 return;
3278
3279 EV_FREQUENT_CHECK;
3280
3281 {
3282 int active = ev_active (w);
3283
3284 checks [active - 1] = checks [--checkcnt];
3285 ev_active (checks [active - 1]) = active;
3286 }
3287
3288 ev_stop (EV_A_ (W)w);
3289
3290 EV_FREQUENT_CHECK;
3291}
3292
3293#if EV_EMBED_ENABLE
3294void noinline
3295ev_embed_sweep (EV_P_ ev_embed *w)
3296{
3297 ev_loop (w->other, EVLOOP_NONBLOCK);
3298}
3299
3300static void
3301embed_io_cb (EV_P_ ev_io *io, int revents)
3302{
3303 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3304
3305 if (ev_cb (w))
3306 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3307 else
3308 ev_loop (w->other, EVLOOP_NONBLOCK);
3309}
3310
3311static void
3312embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3313{
3314 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3315
3316 {
3317 EV_P = w->other;
3318
3319 while (fdchangecnt)
3320 {
3321 fd_reify (EV_A);
3322 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3323 }
3324 }
3325}
3326
3327static void
3328embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3329{
3330 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3331
3332 ev_embed_stop (EV_A_ w);
3333
3334 {
3335 EV_P = w->other;
3336
3337 ev_loop_fork (EV_A);
3338 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3339 }
3340
3341 ev_embed_start (EV_A_ w);
3342}
3343
3344#if 0
3345static void
3346embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3347{
3348 ev_idle_stop (EV_A_ idle);
3349}
3350#endif
3351
3352void
3353ev_embed_start (EV_P_ ev_embed *w)
3354{
3355 if (expect_false (ev_is_active (w)))
3356 return;
3357
3358 {
3359 EV_P = w->other;
3360 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3361 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3362 }
3363
3364 EV_FREQUENT_CHECK;
3365
3366 ev_set_priority (&w->io, ev_priority (w));
3367 ev_io_start (EV_A_ &w->io);
3368
3369 ev_prepare_init (&w->prepare, embed_prepare_cb);
3370 ev_set_priority (&w->prepare, EV_MINPRI);
3371 ev_prepare_start (EV_A_ &w->prepare);
3372
3373 ev_fork_init (&w->fork, embed_fork_cb);
3374 ev_fork_start (EV_A_ &w->fork);
3375
3376 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3377
1546 ev_start (EV_A_ (W)w, 1); 3378 ev_start (EV_A_ (W)w, 1);
1547 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1548}
1549 3379
3380 EV_FREQUENT_CHECK;
3381}
3382
1550void 3383void
1551ev_child_stop (EV_P_ struct ev_child *w) 3384ev_embed_stop (EV_P_ ev_embed *w)
1552{ 3385{
1553 ev_clear_pending (EV_A_ (W)w); 3386 clear_pending (EV_A_ (W)w);
1554 if (!ev_is_active (w)) 3387 if (expect_false (!ev_is_active (w)))
1555 return; 3388 return;
1556 3389
1557 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3390 EV_FREQUENT_CHECK;
3391
3392 ev_io_stop (EV_A_ &w->io);
3393 ev_prepare_stop (EV_A_ &w->prepare);
3394 ev_fork_stop (EV_A_ &w->fork);
3395
3396 EV_FREQUENT_CHECK;
3397}
3398#endif
3399
3400#if EV_FORK_ENABLE
3401void
3402ev_fork_start (EV_P_ ev_fork *w)
3403{
3404 if (expect_false (ev_is_active (w)))
3405 return;
3406
3407 EV_FREQUENT_CHECK;
3408
3409 ev_start (EV_A_ (W)w, ++forkcnt);
3410 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3411 forks [forkcnt - 1] = w;
3412
3413 EV_FREQUENT_CHECK;
3414}
3415
3416void
3417ev_fork_stop (EV_P_ ev_fork *w)
3418{
3419 clear_pending (EV_A_ (W)w);
3420 if (expect_false (!ev_is_active (w)))
3421 return;
3422
3423 EV_FREQUENT_CHECK;
3424
3425 {
3426 int active = ev_active (w);
3427
3428 forks [active - 1] = forks [--forkcnt];
3429 ev_active (forks [active - 1]) = active;
3430 }
3431
1558 ev_stop (EV_A_ (W)w); 3432 ev_stop (EV_A_ (W)w);
3433
3434 EV_FREQUENT_CHECK;
1559} 3435}
3436#endif
3437
3438#if EV_ASYNC_ENABLE
3439void
3440ev_async_start (EV_P_ ev_async *w)
3441{
3442 if (expect_false (ev_is_active (w)))
3443 return;
3444
3445 evpipe_init (EV_A);
3446
3447 EV_FREQUENT_CHECK;
3448
3449 ev_start (EV_A_ (W)w, ++asynccnt);
3450 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3451 asyncs [asynccnt - 1] = w;
3452
3453 EV_FREQUENT_CHECK;
3454}
3455
3456void
3457ev_async_stop (EV_P_ ev_async *w)
3458{
3459 clear_pending (EV_A_ (W)w);
3460 if (expect_false (!ev_is_active (w)))
3461 return;
3462
3463 EV_FREQUENT_CHECK;
3464
3465 {
3466 int active = ev_active (w);
3467
3468 asyncs [active - 1] = asyncs [--asynccnt];
3469 ev_active (asyncs [active - 1]) = active;
3470 }
3471
3472 ev_stop (EV_A_ (W)w);
3473
3474 EV_FREQUENT_CHECK;
3475}
3476
3477void
3478ev_async_send (EV_P_ ev_async *w)
3479{
3480 w->sent = 1;
3481 evpipe_write (EV_A_ &async_pending);
3482}
3483#endif
1560 3484
1561/*****************************************************************************/ 3485/*****************************************************************************/
1562 3486
1563struct ev_once 3487struct ev_once
1564{ 3488{
1565 struct ev_io io; 3489 ev_io io;
1566 struct ev_timer to; 3490 ev_timer to;
1567 void (*cb)(int revents, void *arg); 3491 void (*cb)(int revents, void *arg);
1568 void *arg; 3492 void *arg;
1569}; 3493};
1570 3494
1571static void 3495static void
1572once_cb (EV_P_ struct ev_once *once, int revents) 3496once_cb (EV_P_ struct ev_once *once, int revents)
1573{ 3497{
1574 void (*cb)(int revents, void *arg) = once->cb; 3498 void (*cb)(int revents, void *arg) = once->cb;
1575 void *arg = once->arg; 3499 void *arg = once->arg;
1576 3500
1577 ev_io_stop (EV_A_ &once->io); 3501 ev_io_stop (EV_A_ &once->io);
1578 ev_timer_stop (EV_A_ &once->to); 3502 ev_timer_stop (EV_A_ &once->to);
1579 ev_free (once); 3503 ev_free (once);
1580 3504
1581 cb (revents, arg); 3505 cb (revents, arg);
1582} 3506}
1583 3507
1584static void 3508static void
1585once_cb_io (EV_P_ struct ev_io *w, int revents) 3509once_cb_io (EV_P_ ev_io *w, int revents)
1586{ 3510{
1587 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3511 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3512
3513 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1588} 3514}
1589 3515
1590static void 3516static void
1591once_cb_to (EV_P_ struct ev_timer *w, int revents) 3517once_cb_to (EV_P_ ev_timer *w, int revents)
1592{ 3518{
1593 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3519 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3520
3521 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1594} 3522}
1595 3523
1596void 3524void
1597ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3525ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1598{ 3526{
1599 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3527 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1600 3528
1601 if (!once) 3529 if (expect_false (!once))
3530 {
1602 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3531 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1603 else 3532 return;
1604 { 3533 }
3534
1605 once->cb = cb; 3535 once->cb = cb;
1606 once->arg = arg; 3536 once->arg = arg;
1607 3537
1608 ev_init (&once->io, once_cb_io); 3538 ev_init (&once->io, once_cb_io);
1609 if (fd >= 0) 3539 if (fd >= 0)
3540 {
3541 ev_io_set (&once->io, fd, events);
3542 ev_io_start (EV_A_ &once->io);
3543 }
3544
3545 ev_init (&once->to, once_cb_to);
3546 if (timeout >= 0.)
3547 {
3548 ev_timer_set (&once->to, timeout, 0.);
3549 ev_timer_start (EV_A_ &once->to);
3550 }
3551}
3552
3553/*****************************************************************************/
3554
3555#if EV_WALK_ENABLE
3556void
3557ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3558{
3559 int i, j;
3560 ev_watcher_list *wl, *wn;
3561
3562 if (types & (EV_IO | EV_EMBED))
3563 for (i = 0; i < anfdmax; ++i)
3564 for (wl = anfds [i].head; wl; )
1610 { 3565 {
1611 ev_io_set (&once->io, fd, events); 3566 wn = wl->next;
1612 ev_io_start (EV_A_ &once->io); 3567
3568#if EV_EMBED_ENABLE
3569 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3570 {
3571 if (types & EV_EMBED)
3572 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3573 }
3574 else
3575#endif
3576#if EV_USE_INOTIFY
3577 if (ev_cb ((ev_io *)wl) == infy_cb)
3578 ;
3579 else
3580#endif
3581 if ((ev_io *)wl != &pipe_w)
3582 if (types & EV_IO)
3583 cb (EV_A_ EV_IO, wl);
3584
3585 wl = wn;
1613 } 3586 }
1614 3587
1615 ev_init (&once->to, once_cb_to); 3588 if (types & (EV_TIMER | EV_STAT))
1616 if (timeout >= 0.) 3589 for (i = timercnt + HEAP0; i-- > HEAP0; )
3590#if EV_STAT_ENABLE
3591 /*TODO: timer is not always active*/
3592 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1617 { 3593 {
1618 ev_timer_set (&once->to, timeout, 0.); 3594 if (types & EV_STAT)
1619 ev_timer_start (EV_A_ &once->to); 3595 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1620 } 3596 }
1621 } 3597 else
3598#endif
3599 if (types & EV_TIMER)
3600 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3601
3602#if EV_PERIODIC_ENABLE
3603 if (types & EV_PERIODIC)
3604 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3605 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3606#endif
3607
3608#if EV_IDLE_ENABLE
3609 if (types & EV_IDLE)
3610 for (j = NUMPRI; i--; )
3611 for (i = idlecnt [j]; i--; )
3612 cb (EV_A_ EV_IDLE, idles [j][i]);
3613#endif
3614
3615#if EV_FORK_ENABLE
3616 if (types & EV_FORK)
3617 for (i = forkcnt; i--; )
3618 if (ev_cb (forks [i]) != embed_fork_cb)
3619 cb (EV_A_ EV_FORK, forks [i]);
3620#endif
3621
3622#if EV_ASYNC_ENABLE
3623 if (types & EV_ASYNC)
3624 for (i = asynccnt; i--; )
3625 cb (EV_A_ EV_ASYNC, asyncs [i]);
3626#endif
3627
3628 if (types & EV_PREPARE)
3629 for (i = preparecnt; i--; )
3630#if EV_EMBED_ENABLE
3631 if (ev_cb (prepares [i]) != embed_prepare_cb)
3632#endif
3633 cb (EV_A_ EV_PREPARE, prepares [i]);
3634
3635 if (types & EV_CHECK)
3636 for (i = checkcnt; i--; )
3637 cb (EV_A_ EV_CHECK, checks [i]);
3638
3639 if (types & EV_SIGNAL)
3640 for (i = 0; i < EV_NSIG - 1; ++i)
3641 for (wl = signals [i].head; wl; )
3642 {
3643 wn = wl->next;
3644 cb (EV_A_ EV_SIGNAL, wl);
3645 wl = wn;
3646 }
3647
3648 if (types & EV_CHILD)
3649 for (i = EV_PID_HASHSIZE; i--; )
3650 for (wl = childs [i]; wl; )
3651 {
3652 wn = wl->next;
3653 cb (EV_A_ EV_CHILD, wl);
3654 wl = wn;
3655 }
3656/* EV_STAT 0x00001000 /* stat data changed */
3657/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1622} 3658}
3659#endif
3660
3661#if EV_MULTIPLICITY
3662 #include "ev_wrap.h"
3663#endif
1623 3664
1624#ifdef __cplusplus 3665#ifdef __cplusplus
1625} 3666}
1626#endif 3667#endif
1627 3668

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