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Comparing libev/ev.c (file contents):
Revision 1.81 by root, Fri Nov 9 17:07:59 2007 UTC vs.
Revision 1.316 by root, Fri Sep 18 21:02:12 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 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# 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
33 65
34# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
37# 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
38 81
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
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 91# if HAVE_SELECT && HAVE_SYS_SELECT_H
40# define EV_USE_SELECT 1 92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
41# endif 95# endif
96# endif
42 97
98# ifndef EV_USE_POLL
43# if HAVE_POLL && HAVE_POLL_H 99# if HAVE_POLL && HAVE_POLL_H
44# define EV_USE_POLL 1 100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
45# endif 103# endif
46 104# endif
105
106# ifndef EV_USE_EPOLL
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
48# define EV_USE_EPOLL 1 108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
49# endif 111# endif
50 112# endif
113
114# ifndef EV_USE_KQUEUE
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
52# define EV_USE_KQUEUE 1 116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
53# 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
54 129
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
55#endif 154#endif
56 155
57#include <math.h> 156#include <math.h>
58#include <stdlib.h> 157#include <stdlib.h>
59#include <fcntl.h> 158#include <fcntl.h>
… …
66#include <sys/types.h> 165#include <sys/types.h>
67#include <time.h> 166#include <time.h>
68 167
69#include <signal.h> 168#include <signal.h>
70 169
71#ifndef WIN32
72# include <unistd.h>
73# include <sys/time.h>
74# include <sys/wait.h>
75#endif
76/**/
77
78#ifndef EV_USE_MONOTONIC
79# define EV_USE_MONOTONIC 1
80#endif
81
82#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1
84#endif
85
86#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88#endif
89
90#ifndef EV_USE_EPOLL
91# define EV_USE_EPOLL 0
92#endif
93
94#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0
96#endif
97
98#ifndef EV_USE_WIN32
99# ifdef WIN32
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else
104# define EV_USE_WIN32 0
105# endif
106#endif
107
108#ifndef EV_USE_REALTIME
109# define EV_USE_REALTIME 1
110#endif
111
112/**/
113
114#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0
117#endif
118
119#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0
122#endif
123
124/**/
125
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130
131#ifdef EV_H 170#ifdef EV_H
132# include EV_H 171# include EV_H
133#else 172#else
134# include "ev.h" 173# include "ev.h"
135#endif 174#endif
136 175
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
137#if __GNUC__ >= 3 456#if __GNUC__ >= 4
138# define expect(expr,value) __builtin_expect ((expr),(value)) 457# define expect(expr,value) __builtin_expect ((expr),(value))
139# define inline inline 458# define noinline __attribute__ ((noinline))
140#else 459#else
141# define expect(expr,value) (expr) 460# define expect(expr,value) (expr)
142# define inline static 461# define noinline
462# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
463# define inline
464# endif
143#endif 465#endif
144 466
145#define expect_false(expr) expect ((expr) != 0, 0) 467#define expect_false(expr) expect ((expr) != 0, 0)
146#define expect_true(expr) expect ((expr) != 0, 1) 468#define expect_true(expr) expect ((expr) != 0, 1)
469#define inline_size static inline
147 470
471#if EV_MINIMAL
472# define inline_speed static noinline
473#else
474# define inline_speed static inline
475#endif
476
148#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
149#define ABSPRI(w) ((w)->priority - EV_MINPRI) 482# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
483#endif
150 484
485#define EMPTY /* required for microsofts broken pseudo-c compiler */
486#define EMPTY2(a,b) /* used to suppress some warnings */
487
151typedef struct ev_watcher *W; 488typedef ev_watcher *W;
152typedef struct ev_watcher_list *WL; 489typedef ev_watcher_list *WL;
153typedef struct ev_watcher_time *WT; 490typedef ev_watcher_time *WT;
154 491
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
155static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 502static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
503#endif
156 504
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
157#include "ev_win32.c" 516# include "ev_win32.c"
517#endif
158 518
159/*****************************************************************************/ 519/*****************************************************************************/
160 520
161static void (*syserr_cb)(const char *msg); 521static void (*syserr_cb)(const char *msg);
162 522
523void
163void ev_set_syserr_cb (void (*cb)(const char *msg)) 524ev_set_syserr_cb (void (*cb)(const char *msg))
164{ 525{
165 syserr_cb = cb; 526 syserr_cb = cb;
166} 527}
167 528
168static void 529static void noinline
169syserr (const char *msg) 530ev_syserr (const char *msg)
170{ 531{
171 if (!msg) 532 if (!msg)
172 msg = "(libev) system error"; 533 msg = "(libev) system error";
173 534
174 if (syserr_cb) 535 if (syserr_cb)
… …
178 perror (msg); 539 perror (msg);
179 abort (); 540 abort ();
180 } 541 }
181} 542}
182 543
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
183static void *(*alloc)(void *ptr, long size); 559static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
184 560
561void
185void ev_set_allocator (void *(*cb)(void *ptr, long size)) 562ev_set_allocator (void *(*cb)(void *ptr, long size))
186{ 563{
187 alloc = cb; 564 alloc = cb;
188} 565}
189 566
190static void * 567inline_speed void *
191ev_realloc (void *ptr, long size) 568ev_realloc (void *ptr, long size)
192{ 569{
193 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 570 ptr = alloc (ptr, size);
194 571
195 if (!ptr && size) 572 if (!ptr && size)
196 { 573 {
197 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 574 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
198 abort (); 575 abort ();
… …
204#define ev_malloc(size) ev_realloc (0, (size)) 581#define ev_malloc(size) ev_realloc (0, (size))
205#define ev_free(ptr) ev_realloc ((ptr), 0) 582#define ev_free(ptr) ev_realloc ((ptr), 0)
206 583
207/*****************************************************************************/ 584/*****************************************************************************/
208 585
586/* set in reify when reification needed */
587#define EV_ANFD_REIFY 1
588
589/* file descriptor info structure */
209typedef struct 590typedef struct
210{ 591{
211 WL head; 592 WL head;
212 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 */
213 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
214} ANFD; 603} ANFD;
215 604
605/* stores the pending event set for a given watcher */
216typedef struct 606typedef struct
217{ 607{
218 W w; 608 W w;
219 int events; 609 int events; /* the pending event set for the given watcher */
220} 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
221 639
222#if EV_MULTIPLICITY 640#if EV_MULTIPLICITY
223 641
224 struct ev_loop 642 struct ev_loop
225 { 643 {
644 ev_tstamp ev_rt_now;
645 #define ev_rt_now ((loop)->ev_rt_now)
226 #define VAR(name,decl) decl; 646 #define VAR(name,decl) decl;
227 #include "ev_vars.h" 647 #include "ev_vars.h"
228 #undef VAR 648 #undef VAR
229 }; 649 };
230 #include "ev_wrap.h" 650 #include "ev_wrap.h"
231 651
232 struct ev_loop default_loop_struct; 652 static struct ev_loop default_loop_struct;
233 static struct ev_loop *default_loop; 653 struct ev_loop *ev_default_loop_ptr;
234 654
235#else 655#else
236 656
657 ev_tstamp ev_rt_now;
237 #define VAR(name,decl) static decl; 658 #define VAR(name,decl) static decl;
238 #include "ev_vars.h" 659 #include "ev_vars.h"
239 #undef VAR 660 #undef VAR
240 661
241 static int default_loop; 662 static int ev_default_loop_ptr;
242 663
243#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
244 677
245/*****************************************************************************/ 678/*****************************************************************************/
246 679
247inline ev_tstamp 680#ifndef EV_HAVE_EV_TIME
681ev_tstamp
248ev_time (void) 682ev_time (void)
249{ 683{
250#if EV_USE_REALTIME 684#if EV_USE_REALTIME
685 if (expect_true (have_realtime))
686 {
251 struct timespec ts; 687 struct timespec ts;
252 clock_gettime (CLOCK_REALTIME, &ts); 688 clock_gettime (CLOCK_REALTIME, &ts);
253 return ts.tv_sec + ts.tv_nsec * 1e-9; 689 return ts.tv_sec + ts.tv_nsec * 1e-9;
254#else 690 }
691#endif
692
255 struct timeval tv; 693 struct timeval tv;
256 gettimeofday (&tv, 0); 694 gettimeofday (&tv, 0);
257 return tv.tv_sec + tv.tv_usec * 1e-6; 695 return tv.tv_sec + tv.tv_usec * 1e-6;
258#endif
259} 696}
697#endif
260 698
261inline ev_tstamp 699inline_size ev_tstamp
262get_clock (void) 700get_clock (void)
263{ 701{
264#if EV_USE_MONOTONIC 702#if EV_USE_MONOTONIC
265 if (expect_true (have_monotonic)) 703 if (expect_true (have_monotonic))
266 { 704 {
… …
271#endif 709#endif
272 710
273 return ev_time (); 711 return ev_time ();
274} 712}
275 713
714#if EV_MULTIPLICITY
276ev_tstamp 715ev_tstamp
277ev_now (EV_P) 716ev_now (EV_P)
278{ 717{
279 return rt_now; 718 return ev_rt_now;
280} 719}
720#endif
281 721
282#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))
283 786
284#define array_needsize(type,base,cur,cnt,init) \ 787#define array_needsize(type,base,cur,cnt,init) \
285 if (expect_false ((cnt) > cur)) \ 788 if (expect_false ((cnt) > (cur))) \
286 { \ 789 { \
287 int newcnt = cur; \ 790 int ocur_ = (cur); \
288 do \ 791 (base) = (type *)array_realloc \
289 { \ 792 (sizeof (type), (base), &(cur), (cnt)); \
290 newcnt = array_roundsize (type, newcnt << 1); \ 793 init ((base) + (ocur_), (cur) - ocur_); \
291 } \
292 while ((cnt) > newcnt); \
293 \
294 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
295 init (base + cur, newcnt - cur); \
296 cur = newcnt; \
297 } 794 }
298 795
796#if 0
299#define array_slim(type,stem) \ 797#define array_slim(type,stem) \
300 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 798 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
301 { \ 799 { \
302 stem ## max = array_roundsize (stem ## cnt >> 1); \ 800 stem ## max = array_roundsize (stem ## cnt >> 1); \
303 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 801 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
304 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 802 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
305 } 803 }
306 804#endif
307/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
308/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
309#define array_free_microshit(stem) \
310 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
311 805
312#define array_free(stem, idx) \ 806#define array_free(stem, idx) \
313 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
314 808
315/*****************************************************************************/ 809/*****************************************************************************/
316 810
317static void 811/* dummy callback for pending events */
318anfds_init (ANFD *base, int count) 812static void noinline
813pendingcb (EV_P_ ev_prepare *w, int revents)
319{ 814{
320 while (count--)
321 {
322 base->head = 0;
323 base->events = EV_NONE;
324 base->reify = 0;
325
326 ++base;
327 }
328} 815}
329 816
330void 817void noinline
331ev_feed_event (EV_P_ void *w, int revents) 818ev_feed_event (EV_P_ void *w, int revents)
332{ 819{
333 W w_ = (W)w; 820 W w_ = (W)w;
821 int pri = ABSPRI (w_);
334 822
335 if (w_->pending) 823 if (expect_false (w_->pending))
824 pendings [pri][w_->pending - 1].events |= revents;
825 else
336 { 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_;
337 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 830 pendings [pri][w_->pending - 1].events = revents;
338 return;
339 } 831 }
340
341 w_->pending = ++pendingcnt [ABSPRI (w_)];
342 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
343 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
344 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
345} 832}
346 833
347static 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
348queue_events (EV_P_ W *events, int eventcnt, int type) 850queue_events (EV_P_ W *events, int eventcnt, int type)
349{ 851{
350 int i; 852 int i;
351 853
352 for (i = 0; i < eventcnt; ++i) 854 for (i = 0; i < eventcnt; ++i)
353 ev_feed_event (EV_A_ events [i], type); 855 ev_feed_event (EV_A_ events [i], type);
354} 856}
355 857
858/*****************************************************************************/
859
356inline void 860inline_speed void
357fd_event (EV_P_ int fd, int revents) 861fd_event_nc (EV_P_ int fd, int revents)
358{ 862{
359 ANFD *anfd = anfds + fd; 863 ANFD *anfd = anfds + fd;
360 struct ev_io *w; 864 ev_io *w;
361 865
362 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)
363 { 867 {
364 int ev = w->events & revents; 868 int ev = w->events & revents;
365 869
366 if (ev) 870 if (ev)
367 ev_feed_event (EV_A_ (W)w, ev); 871 ev_feed_event (EV_A_ (W)w, ev);
368 } 872 }
369} 873}
370 874
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
371void 886void
372ev_feed_fd_event (EV_P_ int fd, int revents) 887ev_feed_fd_event (EV_P_ int fd, int revents)
373{ 888{
889 if (fd >= 0 && fd < anfdmax)
374 fd_event (EV_A_ fd, revents); 890 fd_event_nc (EV_A_ fd, revents);
375} 891}
376 892
377/*****************************************************************************/ 893/* make sure the external fd watch events are in-sync */
378 894/* with the kernel/libev internal state */
379static void 895inline_size void
380fd_reify (EV_P) 896fd_reify (EV_P)
381{ 897{
382 int i; 898 int i;
383 899
384 for (i = 0; i < fdchangecnt; ++i) 900 for (i = 0; i < fdchangecnt; ++i)
385 { 901 {
386 int fd = fdchanges [i]; 902 int fd = fdchanges [i];
387 ANFD *anfd = anfds + fd; 903 ANFD *anfd = anfds + fd;
388 struct ev_io *w; 904 ev_io *w;
389 905
390 int events = 0; 906 unsigned char events = 0;
391 907
392 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)
393 events |= w->events; 909 events |= (unsigned char)w->events;
394 910
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
395 anfd->reify = 0; 924 anfd->reify = 0;
396
397 method_modify (EV_A_ fd, anfd->events, events);
398 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 }
399 } 930 }
400 931
401 fdchangecnt = 0; 932 fdchangecnt = 0;
402} 933}
403 934
404static void 935/* something about the given fd changed */
936inline_size void
405fd_change (EV_P_ int fd) 937fd_change (EV_P_ int fd, int flags)
406{ 938{
407 if (anfds [fd].reify) 939 unsigned char reify = anfds [fd].reify;
408 return;
409
410 anfds [fd].reify = 1; 940 anfds [fd].reify |= flags;
411 941
942 if (expect_true (!reify))
943 {
412 ++fdchangecnt; 944 ++fdchangecnt;
413 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 945 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
414 fdchanges [fdchangecnt - 1] = fd; 946 fdchanges [fdchangecnt - 1] = fd;
947 }
415} 948}
416 949
417static void 950/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
951inline_speed void
418fd_kill (EV_P_ int fd) 952fd_kill (EV_P_ int fd)
419{ 953{
420 struct ev_io *w; 954 ev_io *w;
421 955
422 while ((w = (struct ev_io *)anfds [fd].head)) 956 while ((w = (ev_io *)anfds [fd].head))
423 { 957 {
424 ev_io_stop (EV_A_ w); 958 ev_io_stop (EV_A_ w);
425 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);
426 } 960 }
427} 961}
428 962
429static int 963/* check whether the given fd is atcually valid, for error recovery */
964inline_size int
430fd_valid (int fd) 965fd_valid (int fd)
431{ 966{
432#ifdef WIN32 967#ifdef _WIN32
433 return !!win32_get_osfhandle (fd); 968 return _get_osfhandle (fd) != -1;
434#else 969#else
435 return fcntl (fd, F_GETFD) != -1; 970 return fcntl (fd, F_GETFD) != -1;
436#endif 971#endif
437} 972}
438 973
439/* called on EBADF to verify fds */ 974/* called on EBADF to verify fds */
440static void 975static void noinline
441fd_ebadf (EV_P) 976fd_ebadf (EV_P)
442{ 977{
443 int fd; 978 int fd;
444 979
445 for (fd = 0; fd < anfdmax; ++fd) 980 for (fd = 0; fd < anfdmax; ++fd)
446 if (anfds [fd].events) 981 if (anfds [fd].events)
447 if (!fd_valid (fd) == -1 && errno == EBADF) 982 if (!fd_valid (fd) && errno == EBADF)
448 fd_kill (EV_A_ fd); 983 fd_kill (EV_A_ fd);
449} 984}
450 985
451/* 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 */
452static void 987static void noinline
453fd_enomem (EV_P) 988fd_enomem (EV_P)
454{ 989{
455 int fd; 990 int fd;
456 991
457 for (fd = anfdmax; fd--; ) 992 for (fd = anfdmax; fd--; )
458 if (anfds [fd].events) 993 if (anfds [fd].events)
459 { 994 {
460 fd_kill (EV_A_ fd); 995 fd_kill (EV_A_ fd);
461 return; 996 break;
462 } 997 }
463} 998}
464 999
465/* 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 */
466static void 1001static void noinline
467fd_rearm_all (EV_P) 1002fd_rearm_all (EV_P)
468{ 1003{
469 int fd; 1004 int fd;
470 1005
471 /* this should be highly optimised to not do anything but set a flag */
472 for (fd = 0; fd < anfdmax; ++fd) 1006 for (fd = 0; fd < anfdmax; ++fd)
473 if (anfds [fd].events) 1007 if (anfds [fd].events)
474 { 1008 {
475 anfds [fd].events = 0; 1009 anfds [fd].events = 0;
476 fd_change (EV_A_ fd); 1010 anfds [fd].emask = 0;
1011 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
477 } 1012 }
478} 1013}
479 1014
480/*****************************************************************************/ 1015/*****************************************************************************/
481 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) */
482static void 1247static void
483upheap (WT *heap, int k) 1248pipecb (EV_P_ ev_io *iow, int revents)
484{ 1249{
485 WT w = heap [k]; 1250 int i;
486 1251
487 while (k && heap [k >> 1]->at > w->at) 1252#if EV_USE_EVENTFD
488 { 1253 if (evfd >= 0)
489 heap [k] = heap [k >> 1];
490 ((W)heap [k])->active = k + 1;
491 k >>= 1;
492 } 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 }
493 1264
494 heap [k] = w; 1265 if (sig_pending)
495 ((W)heap [k])->active = k + 1; 1266 {
1267 sig_pending = 0;
496 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
497} 1287}
1288
1289/*****************************************************************************/
498 1290
499static void 1291static void
500downheap (WT *heap, int N, int k)
501{
502 WT w = heap [k];
503
504 while (k < (N >> 1))
505 {
506 int j = k << 1;
507
508 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
509 ++j;
510
511 if (w->at <= heap [j]->at)
512 break;
513
514 heap [k] = heap [j];
515 ((W)heap [k])->active = k + 1;
516 k = j;
517 }
518
519 heap [k] = w;
520 ((W)heap [k])->active = k + 1;
521}
522
523/*****************************************************************************/
524
525typedef struct
526{
527 WL head;
528 sig_atomic_t volatile gotsig;
529} ANSIG;
530
531static ANSIG *signals;
532static int signalmax;
533
534static int sigpipe [2];
535static sig_atomic_t volatile gotsig;
536static struct ev_io sigev;
537
538static void
539signals_init (ANSIG *base, int count)
540{
541 while (count--)
542 {
543 base->head = 0;
544 base->gotsig = 0;
545
546 ++base;
547 }
548}
549
550static void
551sighandler (int signum) 1292ev_sighandler (int signum)
552{ 1293{
1294#if EV_MULTIPLICITY
1295 EV_P = signals [signum - 1].loop;
1296#endif
1297
553#if WIN32 1298#if _WIN32
554 signal (signum, sighandler); 1299 signal (signum, ev_sighandler);
555#endif 1300#endif
556 1301
557 signals [signum - 1].gotsig = 1; 1302 signals [signum - 1].pending = 1;
558 1303 evpipe_write (EV_A_ &sig_pending);
559 if (!gotsig)
560 {
561 int old_errno = errno;
562 gotsig = 1;
563#ifdef WIN32
564 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
565#else
566 write (sigpipe [1], &signum, 1);
567#endif
568 errno = old_errno;
569 }
570} 1304}
571 1305
572void 1306void noinline
573ev_feed_signal_event (EV_P_ int signum) 1307ev_feed_signal_event (EV_P_ int signum)
574{ 1308{
575 WL w; 1309 WL w;
576 1310
1311 if (expect_false (signum <= 0 || signum > EV_NSIG))
1312 return;
1313
1314 --signum;
1315
577#if EV_MULTIPLICITY 1316#if EV_MULTIPLICITY
578 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 */
579#endif 1318 /* or, likely more useful, feeding a signal nobody is waiting for */
580 1319
581 --signum; 1320 if (expect_false (signals [signum].loop != EV_A))
582
583 if (signum < 0 || signum >= signalmax)
584 return; 1321 return;
1322#endif
585 1323
586 signals [signum].gotsig = 0; 1324 signals [signum].pending = 0;
587 1325
588 for (w = signals [signum].head; w; w = w->next) 1326 for (w = signals [signum].head; w; w = w->next)
589 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1327 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
590} 1328}
591 1329
1330#if EV_USE_SIGNALFD
592static void 1331static void
593sigcb (EV_P_ struct ev_io *iow, int revents) 1332sigfdcb (EV_P_ ev_io *iow, int revents)
594{ 1333{
595 int signum; 1334 struct signalfd_siginfo si[2], *sip; /* these structs are big */
596 1335
597#ifdef WIN32 1336 for (;;)
598 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1337 {
599#else 1338 ssize_t res = read (sigfd, si, sizeof (si));
600 read (sigpipe [0], &revents, 1);
601#endif
602 gotsig = 0;
603 1339
604 for (signum = signalmax; signum--; ) 1340 /* not ISO-C, as res might be -1, but works with SuS */
605 if (signals [signum].gotsig) 1341 for (sip = si; (char *)sip < (char *)si + res; ++sip)
606 ev_feed_signal_event (EV_A_ signum + 1); 1342 ev_feed_signal_event (EV_A_ sip->ssi_signo);
607}
608 1343
609static void 1344 if (res < (ssize_t)sizeof (si))
610siginit (EV_P) 1345 break;
611{ 1346 }
612#ifndef WIN32
613 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
614 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
615
616 /* rather than sort out wether we really need nb, set it */
617 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
618 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
619#endif
620
621 ev_io_set (&sigev, sigpipe [0], EV_READ);
622 ev_io_start (EV_A_ &sigev);
623 ev_unref (EV_A); /* child watcher should not keep loop alive */
624} 1347}
1348#endif
625 1349
626/*****************************************************************************/ 1350/*****************************************************************************/
627 1351
628static struct ev_child *childs [PID_HASHSIZE]; 1352static WL childs [EV_PID_HASHSIZE];
629 1353
630#ifndef WIN32 1354#ifndef _WIN32
631 1355
632static 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}
633 1381
634#ifndef WCONTINUED 1382#ifndef WCONTINUED
635# define WCONTINUED 0 1383# define WCONTINUED 0
636#endif 1384#endif
637 1385
1386/* called on sigchld etc., calls waitpid */
638static void 1387static void
639child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
640{
641 struct ev_child *w;
642
643 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
644 if (w->pid == pid || !w->pid)
645 {
646 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
647 w->rpid = pid;
648 w->rstatus = status;
649 ev_feed_event (EV_A_ (W)w, EV_CHILD);
650 }
651}
652
653static void
654childcb (EV_P_ struct ev_signal *sw, int revents) 1388childcb (EV_P_ ev_signal *sw, int revents)
655{ 1389{
656 int pid, status; 1390 int pid, status;
657 1391
1392 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
658 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1393 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
659 { 1394 if (!WCONTINUED
1395 || errno != EINVAL
1396 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1397 return;
1398
660 /* 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 */
661 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1401 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
662 1402
663 child_reap (EV_A_ sw, pid, pid, status); 1403 child_reap (EV_A_ pid, pid, status);
1404 if (EV_PID_HASHSIZE > 1)
664 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 */
665 }
666} 1406}
667 1407
668#endif 1408#endif
669 1409
670/*****************************************************************************/ 1410/*****************************************************************************/
671 1411
1412#if EV_USE_PORT
1413# include "ev_port.c"
1414#endif
672#if EV_USE_KQUEUE 1415#if EV_USE_KQUEUE
673# include "ev_kqueue.c" 1416# include "ev_kqueue.c"
674#endif 1417#endif
675#if EV_USE_EPOLL 1418#if EV_USE_EPOLL
676# include "ev_epoll.c" 1419# include "ev_epoll.c"
… …
693{ 1436{
694 return EV_VERSION_MINOR; 1437 return EV_VERSION_MINOR;
695} 1438}
696 1439
697/* 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 */
698static int 1441int inline_size
699enable_secure (void) 1442enable_secure (void)
700{ 1443{
701#ifdef WIN32 1444#ifdef _WIN32
702 return 0; 1445 return 0;
703#else 1446#else
704 return getuid () != geteuid () 1447 return getuid () != geteuid ()
705 || getgid () != getegid (); 1448 || getgid () != getegid ();
706#endif 1449#endif
707} 1450}
708 1451
709int 1452unsigned int
710ev_method (EV_P) 1453ev_supported_backends (void)
711{ 1454{
712 return method; 1455 unsigned int flags = 0;
713}
714 1456
715static void 1457 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
716loop_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)
717{ 1468{
718 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)
719 { 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
720#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 {
1664 /*ev_ref (EV_A);*/
1665 /*ev_io_stop (EV_A_ &sigfd_w);*/
1666
1667 close (sigfd);
1668 }
1669#endif
1670
1671#if EV_USE_INOTIFY
1672 if (fs_fd >= 0)
1673 close (fs_fd);
1674#endif
1675
1676 if (backend_fd >= 0)
1677 close (backend_fd);
1678
1679#if EV_USE_PORT
1680 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1681#endif
1682#if EV_USE_KQUEUE
1683 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1684#endif
1685#if EV_USE_EPOLL
1686 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1687#endif
1688#if EV_USE_POLL
1689 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1690#endif
1691#if EV_USE_SELECT
1692 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1693#endif
1694
1695 for (i = NUMPRI; i--; )
1696 {
1697 array_free (pending, [i]);
1698#if EV_IDLE_ENABLE
1699 array_free (idle, [i]);
1700#endif
1701 }
1702
1703 ev_free (anfds); anfds = 0; anfdmax = 0;
1704
1705 /* have to use the microsoft-never-gets-it-right macro */
1706 array_free (rfeed, EMPTY);
1707 array_free (fdchange, EMPTY);
1708 array_free (timer, EMPTY);
1709#if EV_PERIODIC_ENABLE
1710 array_free (periodic, EMPTY);
1711#endif
1712#if EV_FORK_ENABLE
1713 array_free (fork, EMPTY);
1714#endif
1715 array_free (prepare, EMPTY);
1716 array_free (check, EMPTY);
1717#if EV_ASYNC_ENABLE
1718 array_free (async, EMPTY);
1719#endif
1720
1721 backend = 0;
1722}
1723
1724#if EV_USE_INOTIFY
1725inline_size void infy_fork (EV_P);
1726#endif
1727
1728inline_size void
1729loop_fork (EV_P)
1730{
1731#if EV_USE_PORT
1732 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1733#endif
1734#if EV_USE_KQUEUE
1735 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1736#endif
1737#if EV_USE_EPOLL
1738 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1739#endif
1740#if EV_USE_INOTIFY
1741 infy_fork (EV_A);
1742#endif
1743
1744 if (ev_is_active (&pipe_w))
1745 {
1746 /* this "locks" the handlers against writing to the pipe */
1747 /* while we modify the fd vars */
1748 sig_pending = 1;
1749#if EV_ASYNC_ENABLE
1750 async_pending = 1;
1751#endif
1752
1753 ev_ref (EV_A);
1754 ev_io_stop (EV_A_ &pipe_w);
1755
1756#if EV_USE_EVENTFD
1757 if (evfd >= 0)
1758 close (evfd);
1759#endif
1760
1761 if (evpipe [0] >= 0)
1762 {
1763 EV_WIN32_CLOSE_FD (evpipe [0]);
1764 EV_WIN32_CLOSE_FD (evpipe [1]);
1765 }
1766
1767 evpipe_init (EV_A);
1768 /* now iterate over everything, in case we missed something */
1769 pipecb (EV_A_ &pipe_w, EV_READ);
1770 }
1771
1772 postfork = 0;
1773}
1774
1775#if EV_MULTIPLICITY
1776
1777struct ev_loop *
1778ev_loop_new (unsigned int flags)
1779{
1780 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1781
1782 memset (EV_A, 0, sizeof (struct ev_loop));
1783 loop_init (EV_A_ flags);
1784
1785 if (ev_backend (EV_A))
1786 return EV_A;
1787
1788 return 0;
1789}
1790
1791void
1792ev_loop_destroy (EV_P)
1793{
1794 loop_destroy (EV_A);
1795 ev_free (loop);
1796}
1797
1798void
1799ev_loop_fork (EV_P)
1800{
1801 postfork = 1; /* must be in line with ev_default_fork */
1802}
1803#endif /* multiplicity */
1804
1805#if EV_VERIFY
1806static void noinline
1807verify_watcher (EV_P_ W w)
1808{
1809 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1810
1811 if (w->pending)
1812 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1813}
1814
1815static void noinline
1816verify_heap (EV_P_ ANHE *heap, int N)
1817{
1818 int i;
1819
1820 for (i = HEAP0; i < N + HEAP0; ++i)
1821 {
1822 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1823 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1824 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1825
1826 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1827 }
1828}
1829
1830static void noinline
1831array_verify (EV_P_ W *ws, int cnt)
1832{
1833 while (cnt--)
1834 {
1835 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1836 verify_watcher (EV_A_ ws [cnt]);
1837 }
1838}
1839#endif
1840
1841#if EV_MINIMAL < 2
1842void
1843ev_loop_verify (EV_P)
1844{
1845#if EV_VERIFY
1846 int i;
1847 WL w;
1848
1849 assert (activecnt >= -1);
1850
1851 assert (fdchangemax >= fdchangecnt);
1852 for (i = 0; i < fdchangecnt; ++i)
1853 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1854
1855 assert (anfdmax >= 0);
1856 for (i = 0; i < anfdmax; ++i)
1857 for (w = anfds [i].head; w; w = w->next)
721 { 1858 {
722 struct timespec ts; 1859 verify_watcher (EV_A_ (W)w);
723 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1860 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
724 have_monotonic = 1; 1861 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
725 } 1862 }
726#endif
727 1863
728 rt_now = ev_time (); 1864 assert (timermax >= timercnt);
729 mn_now = get_clock (); 1865 verify_heap (EV_A_ timers, timercnt);
730 now_floor = mn_now;
731 rtmn_diff = rt_now - mn_now;
732 1866
733 if (methods == EVMETHOD_AUTO) 1867#if EV_PERIODIC_ENABLE
734 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1868 assert (periodicmax >= periodiccnt);
735 methods = atoi (getenv ("LIBEV_METHODS")); 1869 verify_heap (EV_A_ periodics, periodiccnt);
736 else
737 methods = EVMETHOD_ANY;
738
739 method = 0;
740#if EV_USE_WIN32
741 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
742#endif
743#if EV_USE_KQUEUE
744 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
745#endif
746#if EV_USE_EPOLL
747 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
748#endif
749#if EV_USE_POLL
750 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
751#endif
752#if EV_USE_SELECT
753 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
754#endif
755
756 ev_watcher_init (&sigev, sigcb);
757 ev_set_priority (&sigev, EV_MAXPRI);
758 }
759}
760
761void
762loop_destroy (EV_P)
763{
764 int i;
765
766#if EV_USE_WIN32
767 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
768#endif
769#if EV_USE_KQUEUE
770 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
771#endif
772#if EV_USE_EPOLL
773 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
774#endif
775#if EV_USE_POLL
776 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
777#endif
778#if EV_USE_SELECT
779 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
780#endif 1870#endif
781 1871
782 for (i = NUMPRI; i--; ) 1872 for (i = NUMPRI; i--; )
783 array_free (pending, [i]); 1873 {
1874 assert (pendingmax [i] >= pendingcnt [i]);
1875#if EV_IDLE_ENABLE
1876 assert (idleall >= 0);
1877 assert (idlemax [i] >= idlecnt [i]);
1878 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1879#endif
1880 }
784 1881
785 /* have to use the microsoft-never-gets-it-right macro */ 1882#if EV_FORK_ENABLE
786 array_free_microshit (fdchange); 1883 assert (forkmax >= forkcnt);
787 array_free_microshit (timer); 1884 array_verify (EV_A_ (W *)forks, forkcnt);
788 array_free_microshit (periodic); 1885#endif
789 array_free_microshit (idle);
790 array_free_microshit (prepare);
791 array_free_microshit (check);
792 1886
793 method = 0; 1887#if EV_ASYNC_ENABLE
794} 1888 assert (asyncmax >= asynccnt);
1889 array_verify (EV_A_ (W *)asyncs, asynccnt);
1890#endif
795 1891
796static void 1892 assert (preparemax >= preparecnt);
797loop_fork (EV_P) 1893 array_verify (EV_A_ (W *)prepares, preparecnt);
798{ 1894
799#if EV_USE_EPOLL 1895 assert (checkmax >= checkcnt);
800 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1896 array_verify (EV_A_ (W *)checks, checkcnt);
1897
1898# if 0
1899 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1900 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
801#endif 1901# endif
802#if EV_USE_KQUEUE
803 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
804#endif 1902#endif
805
806 if (ev_is_active (&sigev))
807 {
808 /* default loop */
809
810 ev_ref (EV_A);
811 ev_io_stop (EV_A_ &sigev);
812 close (sigpipe [0]);
813 close (sigpipe [1]);
814
815 while (pipe (sigpipe))
816 syserr ("(libev) error creating pipe");
817
818 siginit (EV_A);
819 }
820
821 postfork = 0;
822} 1903}
1904#endif
823 1905
824#if EV_MULTIPLICITY 1906#if EV_MULTIPLICITY
825struct ev_loop * 1907struct ev_loop *
826ev_loop_new (int methods) 1908ev_default_loop_init (unsigned int flags)
827{
828 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
829
830 memset (loop, 0, sizeof (struct ev_loop));
831
832 loop_init (EV_A_ methods);
833
834 if (ev_method (EV_A))
835 return loop;
836
837 return 0;
838}
839
840void
841ev_loop_destroy (EV_P)
842{
843 loop_destroy (EV_A);
844 ev_free (loop);
845}
846
847void
848ev_loop_fork (EV_P)
849{
850 postfork = 1;
851}
852
853#endif
854
855#if EV_MULTIPLICITY
856struct ev_loop *
857#else 1909#else
858int 1910int
1911ev_default_loop (unsigned int flags)
859#endif 1912#endif
860ev_default_loop (int methods)
861{ 1913{
862 if (sigpipe [0] == sigpipe [1])
863 if (pipe (sigpipe))
864 return 0;
865
866 if (!default_loop) 1914 if (!ev_default_loop_ptr)
867 { 1915 {
868#if EV_MULTIPLICITY 1916#if EV_MULTIPLICITY
869 struct ev_loop *loop = default_loop = &default_loop_struct; 1917 EV_P = ev_default_loop_ptr = &default_loop_struct;
870#else 1918#else
871 default_loop = 1; 1919 ev_default_loop_ptr = 1;
872#endif 1920#endif
873 1921
874 loop_init (EV_A_ methods); 1922 loop_init (EV_A_ flags);
875 1923
876 if (ev_method (EV_A)) 1924 if (ev_backend (EV_A))
877 { 1925 {
878 siginit (EV_A);
879
880#ifndef WIN32 1926#ifndef _WIN32
881 ev_signal_init (&childev, childcb, SIGCHLD); 1927 ev_signal_init (&childev, childcb, SIGCHLD);
882 ev_set_priority (&childev, EV_MAXPRI); 1928 ev_set_priority (&childev, EV_MAXPRI);
883 ev_signal_start (EV_A_ &childev); 1929 ev_signal_start (EV_A_ &childev);
884 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1930 ev_unref (EV_A); /* child watcher should not keep loop alive */
885#endif 1931#endif
886 } 1932 }
887 else 1933 else
888 default_loop = 0; 1934 ev_default_loop_ptr = 0;
889 } 1935 }
890 1936
891 return default_loop; 1937 return ev_default_loop_ptr;
892} 1938}
893 1939
894void 1940void
895ev_default_destroy (void) 1941ev_default_destroy (void)
896{ 1942{
897#if EV_MULTIPLICITY 1943#if EV_MULTIPLICITY
898 struct ev_loop *loop = default_loop; 1944 EV_P = ev_default_loop_ptr;
899#endif 1945#endif
900 1946
1947 ev_default_loop_ptr = 0;
1948
901#ifndef WIN32 1949#ifndef _WIN32
902 ev_ref (EV_A); /* child watcher */ 1950 ev_ref (EV_A); /* child watcher */
903 ev_signal_stop (EV_A_ &childev); 1951 ev_signal_stop (EV_A_ &childev);
904#endif 1952#endif
905 1953
906 ev_ref (EV_A); /* signal watcher */
907 ev_io_stop (EV_A_ &sigev);
908
909 close (sigpipe [0]); sigpipe [0] = 0;
910 close (sigpipe [1]); sigpipe [1] = 0;
911
912 loop_destroy (EV_A); 1954 loop_destroy (EV_A);
913} 1955}
914 1956
915void 1957void
916ev_default_fork (void) 1958ev_default_fork (void)
917{ 1959{
918#if EV_MULTIPLICITY 1960#if EV_MULTIPLICITY
919 struct ev_loop *loop = default_loop; 1961 EV_P = ev_default_loop_ptr;
920#endif 1962#endif
921 1963
922 if (method) 1964 postfork = 1; /* must be in line with ev_loop_fork */
923 postfork = 1;
924} 1965}
925 1966
926/*****************************************************************************/ 1967/*****************************************************************************/
927 1968
928static int 1969void
929any_pending (EV_P) 1970ev_invoke (EV_P_ void *w, int revents)
1971{
1972 EV_CB_INVOKE ((W)w, revents);
1973}
1974
1975unsigned int
1976ev_pending_count (EV_P)
930{ 1977{
931 int pri; 1978 int pri;
1979 unsigned int count = 0;
932 1980
933 for (pri = NUMPRI; pri--; ) 1981 for (pri = NUMPRI; pri--; )
934 if (pendingcnt [pri]) 1982 count += pendingcnt [pri];
935 return 1;
936 1983
937 return 0; 1984 return count;
938} 1985}
939 1986
940static void 1987void noinline
941call_pending (EV_P) 1988ev_invoke_pending (EV_P)
942{ 1989{
943 int pri; 1990 int pri;
944 1991
945 for (pri = NUMPRI; pri--; ) 1992 for (pri = NUMPRI; pri--; )
946 while (pendingcnt [pri]) 1993 while (pendingcnt [pri])
947 { 1994 {
948 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1995 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
949 1996
950 if (p->w) 1997 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
951 { 1998 /* ^ this is no longer true, as pending_w could be here */
1999
952 p->w->pending = 0; 2000 p->w->pending = 0;
953 p->w->cb (EV_A_ p->w, p->events); 2001 EV_CB_INVOKE (p->w, p->events);
954 } 2002 EV_FREQUENT_CHECK;
955 } 2003 }
956} 2004}
957 2005
958static void 2006#if EV_IDLE_ENABLE
2007/* make idle watchers pending. this handles the "call-idle */
2008/* only when higher priorities are idle" logic */
2009inline_size void
2010idle_reify (EV_P)
2011{
2012 if (expect_false (idleall))
2013 {
2014 int pri;
2015
2016 for (pri = NUMPRI; pri--; )
2017 {
2018 if (pendingcnt [pri])
2019 break;
2020
2021 if (idlecnt [pri])
2022 {
2023 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2024 break;
2025 }
2026 }
2027 }
2028}
2029#endif
2030
2031/* make timers pending */
2032inline_size void
959timers_reify (EV_P) 2033timers_reify (EV_P)
960{ 2034{
2035 EV_FREQUENT_CHECK;
2036
961 while (timercnt && ((WT)timers [0])->at <= mn_now) 2037 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
962 { 2038 {
963 struct ev_timer *w = timers [0]; 2039 do
964
965 assert (("inactive timer on timer heap detected", ev_is_active (w)));
966
967 /* first reschedule or stop timer */
968 if (w->repeat)
969 { 2040 {
2041 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2042
2043 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2044
2045 /* first reschedule or stop timer */
2046 if (w->repeat)
2047 {
2048 ev_at (w) += w->repeat;
2049 if (ev_at (w) < mn_now)
2050 ev_at (w) = mn_now;
2051
970 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2052 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
971 ((WT)w)->at = mn_now + w->repeat; 2053
2054 ANHE_at_cache (timers [HEAP0]);
972 downheap ((WT *)timers, timercnt, 0); 2055 downheap (timers, timercnt, HEAP0);
2056 }
2057 else
2058 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2059
2060 EV_FREQUENT_CHECK;
2061 feed_reverse (EV_A_ (W)w);
973 } 2062 }
974 else 2063 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
975 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
976 2064
977 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2065 feed_reverse_done (EV_A_ EV_TIMEOUT);
978 } 2066 }
979} 2067}
980 2068
981static void 2069#if EV_PERIODIC_ENABLE
2070/* make periodics pending */
2071inline_size void
982periodics_reify (EV_P) 2072periodics_reify (EV_P)
983{ 2073{
2074 EV_FREQUENT_CHECK;
2075
984 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 2076 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
985 { 2077 {
986 struct ev_periodic *w = periodics [0]; 2078 int feed_count = 0;
987 2079
2080 do
2081 {
2082 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2083
988 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2084 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
989 2085
990 /* first reschedule or stop timer */ 2086 /* first reschedule or stop timer */
2087 if (w->reschedule_cb)
2088 {
2089 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2090
2091 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2092
2093 ANHE_at_cache (periodics [HEAP0]);
2094 downheap (periodics, periodiccnt, HEAP0);
2095 }
2096 else if (w->interval)
2097 {
2098 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2099 /* if next trigger time is not sufficiently in the future, put it there */
2100 /* this might happen because of floating point inexactness */
2101 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2102 {
2103 ev_at (w) += w->interval;
2104
2105 /* if interval is unreasonably low we might still have a time in the past */
2106 /* so correct this. this will make the periodic very inexact, but the user */
2107 /* has effectively asked to get triggered more often than possible */
2108 if (ev_at (w) < ev_rt_now)
2109 ev_at (w) = ev_rt_now;
2110 }
2111
2112 ANHE_at_cache (periodics [HEAP0]);
2113 downheap (periodics, periodiccnt, HEAP0);
2114 }
2115 else
2116 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2117
2118 EV_FREQUENT_CHECK;
2119 feed_reverse (EV_A_ (W)w);
2120 }
2121 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2122
2123 feed_reverse_done (EV_A_ EV_PERIODIC);
2124 }
2125}
2126
2127/* simply recalculate all periodics */
2128/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2129static void noinline
2130periodics_reschedule (EV_P)
2131{
2132 int i;
2133
2134 /* adjust periodics after time jump */
2135 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2136 {
2137 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2138
991 if (w->reschedule_cb) 2139 if (w->reschedule_cb)
992 {
993 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); 2140 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
994
995 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
996 downheap ((WT *)periodics, periodiccnt, 0);
997 }
998 else if (w->interval) 2141 else if (w->interval)
999 { 2142 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1000 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1001 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
1002 downheap ((WT *)periodics, periodiccnt, 0);
1003 }
1004 else
1005 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1006 2143
1007 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2144 ANHE_at_cache (periodics [i]);
1008 } 2145 }
1009}
1010 2146
1011static void 2147 reheap (periodics, periodiccnt);
1012periodics_reschedule (EV_P) 2148}
2149#endif
2150
2151/* adjust all timers by a given offset */
2152static void noinline
2153timers_reschedule (EV_P_ ev_tstamp adjust)
1013{ 2154{
1014 int i; 2155 int i;
1015 2156
1016 /* adjust periodics after time jump */
1017 for (i = 0; i < periodiccnt; ++i) 2157 for (i = 0; i < timercnt; ++i)
1018 {
1019 struct ev_periodic *w = periodics [i];
1020
1021 if (w->reschedule_cb)
1022 ((WT)w)->at = w->reschedule_cb (w, rt_now);
1023 else if (w->interval)
1024 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1025 } 2158 {
1026 2159 ANHE *he = timers + i + HEAP0;
1027 /* now rebuild the heap */ 2160 ANHE_w (*he)->at += adjust;
1028 for (i = periodiccnt >> 1; i--; ) 2161 ANHE_at_cache (*he);
1029 downheap ((WT *)periodics, periodiccnt, i);
1030}
1031
1032inline int
1033time_update_monotonic (EV_P)
1034{
1035 mn_now = get_clock ();
1036
1037 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1038 { 2162 }
1039 rt_now = rtmn_diff + mn_now;
1040 return 0;
1041 }
1042 else
1043 {
1044 now_floor = mn_now;
1045 rt_now = ev_time ();
1046 return 1;
1047 }
1048} 2163}
1049 2164
1050static void 2165/* fetch new monotonic and realtime times from the kernel */
1051time_update (EV_P) 2166/* also detetc if there was a timejump, and act accordingly */
2167inline_speed void
2168time_update (EV_P_ ev_tstamp max_block)
1052{ 2169{
1053 int i;
1054
1055#if EV_USE_MONOTONIC 2170#if EV_USE_MONOTONIC
1056 if (expect_true (have_monotonic)) 2171 if (expect_true (have_monotonic))
1057 { 2172 {
1058 if (time_update_monotonic (EV_A)) 2173 int i;
2174 ev_tstamp odiff = rtmn_diff;
2175
2176 mn_now = get_clock ();
2177
2178 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2179 /* interpolate in the meantime */
2180 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059 { 2181 {
1060 ev_tstamp odiff = rtmn_diff; 2182 ev_rt_now = rtmn_diff + mn_now;
2183 return;
2184 }
1061 2185
2186 now_floor = mn_now;
2187 ev_rt_now = ev_time ();
2188
1062 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 2189 /* loop a few times, before making important decisions.
2190 * on the choice of "4": one iteration isn't enough,
2191 * in case we get preempted during the calls to
2192 * ev_time and get_clock. a second call is almost guaranteed
2193 * to succeed in that case, though. and looping a few more times
2194 * doesn't hurt either as we only do this on time-jumps or
2195 * in the unlikely event of having been preempted here.
2196 */
2197 for (i = 4; --i; )
1063 { 2198 {
1064 rtmn_diff = rt_now - mn_now; 2199 rtmn_diff = ev_rt_now - mn_now;
1065 2200
1066 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2201 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1067 return; /* all is well */ 2202 return; /* all is well */
1068 2203
1069 rt_now = ev_time (); 2204 ev_rt_now = ev_time ();
1070 mn_now = get_clock (); 2205 mn_now = get_clock ();
1071 now_floor = mn_now; 2206 now_floor = mn_now;
1072 } 2207 }
1073 2208
2209 /* no timer adjustment, as the monotonic clock doesn't jump */
2210 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2211# if EV_PERIODIC_ENABLE
2212 periodics_reschedule (EV_A);
2213# endif
2214 }
2215 else
2216#endif
2217 {
2218 ev_rt_now = ev_time ();
2219
2220 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2221 {
2222 /* adjust timers. this is easy, as the offset is the same for all of them */
2223 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2224#if EV_PERIODIC_ENABLE
1074 periodics_reschedule (EV_A); 2225 periodics_reschedule (EV_A);
1075 /* no timer adjustment, as the monotonic clock doesn't jump */ 2226#endif
1076 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1077 } 2227 }
1078 }
1079 else
1080#endif
1081 {
1082 rt_now = ev_time ();
1083 2228
1084 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1085 {
1086 periodics_reschedule (EV_A);
1087
1088 /* adjust timers. this is easy, as the offset is the same for all */
1089 for (i = 0; i < timercnt; ++i)
1090 ((WT)timers [i])->at += rt_now - mn_now;
1091 }
1092
1093 mn_now = rt_now; 2229 mn_now = ev_rt_now;
1094 } 2230 }
1095} 2231}
1096
1097void
1098ev_ref (EV_P)
1099{
1100 ++activecnt;
1101}
1102
1103void
1104ev_unref (EV_P)
1105{
1106 --activecnt;
1107}
1108
1109static int loop_done;
1110 2232
1111void 2233void
1112ev_loop (EV_P_ int flags) 2234ev_loop (EV_P_ int flags)
1113{ 2235{
1114 double block; 2236#if EV_MINIMAL < 2
1115 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2237 ++loop_depth;
2238#endif
2239
2240 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2241
2242 loop_done = EVUNLOOP_CANCEL;
2243
2244 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1116 2245
1117 do 2246 do
1118 { 2247 {
2248#if EV_VERIFY >= 2
2249 ev_loop_verify (EV_A);
2250#endif
2251
2252#ifndef _WIN32
2253 if (expect_false (curpid)) /* penalise the forking check even more */
2254 if (expect_false (getpid () != curpid))
2255 {
2256 curpid = getpid ();
2257 postfork = 1;
2258 }
2259#endif
2260
2261#if EV_FORK_ENABLE
2262 /* we might have forked, so queue fork handlers */
2263 if (expect_false (postfork))
2264 if (forkcnt)
2265 {
2266 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2267 EV_INVOKE_PENDING;
2268 }
2269#endif
2270
1119 /* queue check watchers (and execute them) */ 2271 /* queue prepare watchers (and execute them) */
1120 if (expect_false (preparecnt)) 2272 if (expect_false (preparecnt))
1121 { 2273 {
1122 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2274 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1123 call_pending (EV_A); 2275 EV_INVOKE_PENDING;
1124 } 2276 }
2277
2278 if (expect_false (loop_done))
2279 break;
1125 2280
1126 /* we might have forked, so reify kernel state if necessary */ 2281 /* we might have forked, so reify kernel state if necessary */
1127 if (expect_false (postfork)) 2282 if (expect_false (postfork))
1128 loop_fork (EV_A); 2283 loop_fork (EV_A);
1129 2284
1130 /* update fd-related kernel structures */ 2285 /* update fd-related kernel structures */
1131 fd_reify (EV_A); 2286 fd_reify (EV_A);
1132 2287
1133 /* calculate blocking time */ 2288 /* calculate blocking time */
2289 {
2290 ev_tstamp waittime = 0.;
2291 ev_tstamp sleeptime = 0.;
1134 2292
1135 /* we only need this for !monotonic clock or timers, but as we basically 2293 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1136 always have timers, we just calculate it always */
1137#if EV_USE_MONOTONIC
1138 if (expect_true (have_monotonic))
1139 time_update_monotonic (EV_A);
1140 else
1141#endif
1142 { 2294 {
1143 rt_now = ev_time (); 2295 /* remember old timestamp for io_blocktime calculation */
1144 mn_now = rt_now; 2296 ev_tstamp prev_mn_now = mn_now;
1145 }
1146 2297
1147 if (flags & EVLOOP_NONBLOCK || idlecnt) 2298 /* update time to cancel out callback processing overhead */
1148 block = 0.; 2299 time_update (EV_A_ 1e100);
1149 else 2300
1150 {
1151 block = MAX_BLOCKTIME; 2301 waittime = MAX_BLOCKTIME;
1152 2302
1153 if (timercnt) 2303 if (timercnt)
1154 { 2304 {
1155 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2305 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1156 if (block > to) block = to; 2306 if (waittime > to) waittime = to;
1157 } 2307 }
1158 2308
2309#if EV_PERIODIC_ENABLE
1159 if (periodiccnt) 2310 if (periodiccnt)
1160 { 2311 {
1161 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 2312 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1162 if (block > to) block = to; 2313 if (waittime > to) waittime = to;
1163 } 2314 }
2315#endif
1164 2316
1165 if (block < 0.) block = 0.; 2317 /* don't let timeouts decrease the waittime below timeout_blocktime */
2318 if (expect_false (waittime < timeout_blocktime))
2319 waittime = timeout_blocktime;
2320
2321 /* extra check because io_blocktime is commonly 0 */
2322 if (expect_false (io_blocktime))
2323 {
2324 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2325
2326 if (sleeptime > waittime - backend_fudge)
2327 sleeptime = waittime - backend_fudge;
2328
2329 if (expect_true (sleeptime > 0.))
2330 {
2331 ev_sleep (sleeptime);
2332 waittime -= sleeptime;
2333 }
2334 }
1166 } 2335 }
1167 2336
1168 method_poll (EV_A_ block); 2337#if EV_MINIMAL < 2
2338 ++loop_count;
2339#endif
2340 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2341 backend_poll (EV_A_ waittime);
2342 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1169 2343
1170 /* update rt_now, do magic */ 2344 /* update ev_rt_now, do magic */
1171 time_update (EV_A); 2345 time_update (EV_A_ waittime + sleeptime);
2346 }
1172 2347
1173 /* queue pending timers and reschedule them */ 2348 /* queue pending timers and reschedule them */
1174 timers_reify (EV_A); /* relative timers called last */ 2349 timers_reify (EV_A); /* relative timers called last */
2350#if EV_PERIODIC_ENABLE
1175 periodics_reify (EV_A); /* absolute timers called first */ 2351 periodics_reify (EV_A); /* absolute timers called first */
2352#endif
1176 2353
2354#if EV_IDLE_ENABLE
1177 /* queue idle watchers unless io or timers are pending */ 2355 /* queue idle watchers unless other events are pending */
1178 if (idlecnt && !any_pending (EV_A)) 2356 idle_reify (EV_A);
1179 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2357#endif
1180 2358
1181 /* queue check watchers, to be executed first */ 2359 /* queue check watchers, to be executed first */
1182 if (checkcnt) 2360 if (expect_false (checkcnt))
1183 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2361 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1184 2362
1185 call_pending (EV_A); 2363 EV_INVOKE_PENDING;
1186 } 2364 }
1187 while (activecnt && !loop_done); 2365 while (expect_true (
2366 activecnt
2367 && !loop_done
2368 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2369 ));
1188 2370
1189 if (loop_done != 2) 2371 if (loop_done == EVUNLOOP_ONE)
1190 loop_done = 0; 2372 loop_done = EVUNLOOP_CANCEL;
2373
2374#if EV_MINIMAL < 2
2375 --loop_depth;
2376#endif
1191} 2377}
1192 2378
1193void 2379void
1194ev_unloop (EV_P_ int how) 2380ev_unloop (EV_P_ int how)
1195{ 2381{
1196 loop_done = how; 2382 loop_done = how;
1197} 2383}
1198 2384
2385void
2386ev_ref (EV_P)
2387{
2388 ++activecnt;
2389}
2390
2391void
2392ev_unref (EV_P)
2393{
2394 --activecnt;
2395}
2396
2397void
2398ev_now_update (EV_P)
2399{
2400 time_update (EV_A_ 1e100);
2401}
2402
2403void
2404ev_suspend (EV_P)
2405{
2406 ev_now_update (EV_A);
2407}
2408
2409void
2410ev_resume (EV_P)
2411{
2412 ev_tstamp mn_prev = mn_now;
2413
2414 ev_now_update (EV_A);
2415 timers_reschedule (EV_A_ mn_now - mn_prev);
2416#if EV_PERIODIC_ENABLE
2417 /* TODO: really do this? */
2418 periodics_reschedule (EV_A);
2419#endif
2420}
2421
1199/*****************************************************************************/ 2422/*****************************************************************************/
2423/* singly-linked list management, used when the expected list length is short */
1200 2424
1201inline void 2425inline_size void
1202wlist_add (WL *head, WL elem) 2426wlist_add (WL *head, WL elem)
1203{ 2427{
1204 elem->next = *head; 2428 elem->next = *head;
1205 *head = elem; 2429 *head = elem;
1206} 2430}
1207 2431
1208inline void 2432inline_size void
1209wlist_del (WL *head, WL elem) 2433wlist_del (WL *head, WL elem)
1210{ 2434{
1211 while (*head) 2435 while (*head)
1212 { 2436 {
1213 if (*head == elem) 2437 if (expect_true (*head == elem))
1214 { 2438 {
1215 *head = elem->next; 2439 *head = elem->next;
1216 return; 2440 break;
1217 } 2441 }
1218 2442
1219 head = &(*head)->next; 2443 head = &(*head)->next;
1220 } 2444 }
1221} 2445}
1222 2446
2447/* internal, faster, version of ev_clear_pending */
1223inline void 2448inline_speed void
1224ev_clear_pending (EV_P_ W w) 2449clear_pending (EV_P_ W w)
1225{ 2450{
1226 if (w->pending) 2451 if (w->pending)
1227 { 2452 {
1228 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2453 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1229 w->pending = 0; 2454 w->pending = 0;
1230 } 2455 }
1231} 2456}
1232 2457
2458int
2459ev_clear_pending (EV_P_ void *w)
2460{
2461 W w_ = (W)w;
2462 int pending = w_->pending;
2463
2464 if (expect_true (pending))
2465 {
2466 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2467 p->w = (W)&pending_w;
2468 w_->pending = 0;
2469 return p->events;
2470 }
2471 else
2472 return 0;
2473}
2474
1233inline void 2475inline_size void
2476pri_adjust (EV_P_ W w)
2477{
2478 int pri = ev_priority (w);
2479 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2480 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2481 ev_set_priority (w, pri);
2482}
2483
2484inline_speed void
1234ev_start (EV_P_ W w, int active) 2485ev_start (EV_P_ W w, int active)
1235{ 2486{
1236 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2487 pri_adjust (EV_A_ w);
1237 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1238
1239 w->active = active; 2488 w->active = active;
1240 ev_ref (EV_A); 2489 ev_ref (EV_A);
1241} 2490}
1242 2491
1243inline void 2492inline_size void
1244ev_stop (EV_P_ W w) 2493ev_stop (EV_P_ W w)
1245{ 2494{
1246 ev_unref (EV_A); 2495 ev_unref (EV_A);
1247 w->active = 0; 2496 w->active = 0;
1248} 2497}
1249 2498
1250/*****************************************************************************/ 2499/*****************************************************************************/
1251 2500
1252void 2501void noinline
1253ev_io_start (EV_P_ struct ev_io *w) 2502ev_io_start (EV_P_ ev_io *w)
1254{ 2503{
1255 int fd = w->fd; 2504 int fd = w->fd;
1256 2505
1257 if (ev_is_active (w)) 2506 if (expect_false (ev_is_active (w)))
1258 return; 2507 return;
1259 2508
1260 assert (("ev_io_start called with negative fd", fd >= 0)); 2509 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2510 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2511
2512 EV_FREQUENT_CHECK;
1261 2513
1262 ev_start (EV_A_ (W)w, 1); 2514 ev_start (EV_A_ (W)w, 1);
1263 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2515 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1264 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2516 wlist_add (&anfds[fd].head, (WL)w);
1265 2517
1266 fd_change (EV_A_ fd); 2518 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1267} 2519 w->events &= ~EV__IOFDSET;
1268 2520
1269void 2521 EV_FREQUENT_CHECK;
2522}
2523
2524void noinline
1270ev_io_stop (EV_P_ struct ev_io *w) 2525ev_io_stop (EV_P_ ev_io *w)
1271{ 2526{
1272 ev_clear_pending (EV_A_ (W)w); 2527 clear_pending (EV_A_ (W)w);
1273 if (!ev_is_active (w)) 2528 if (expect_false (!ev_is_active (w)))
1274 return; 2529 return;
1275 2530
2531 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2532
2533 EV_FREQUENT_CHECK;
2534
1276 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2535 wlist_del (&anfds[w->fd].head, (WL)w);
1277 ev_stop (EV_A_ (W)w); 2536 ev_stop (EV_A_ (W)w);
1278 2537
1279 fd_change (EV_A_ w->fd); 2538 fd_change (EV_A_ w->fd, 1);
1280}
1281 2539
1282void 2540 EV_FREQUENT_CHECK;
2541}
2542
2543void noinline
1283ev_timer_start (EV_P_ struct ev_timer *w) 2544ev_timer_start (EV_P_ ev_timer *w)
1284{ 2545{
1285 if (ev_is_active (w)) 2546 if (expect_false (ev_is_active (w)))
1286 return; 2547 return;
1287 2548
1288 ((WT)w)->at += mn_now; 2549 ev_at (w) += mn_now;
1289 2550
1290 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2551 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1291 2552
2553 EV_FREQUENT_CHECK;
2554
2555 ++timercnt;
1292 ev_start (EV_A_ (W)w, ++timercnt); 2556 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1293 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2557 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1294 timers [timercnt - 1] = w; 2558 ANHE_w (timers [ev_active (w)]) = (WT)w;
1295 upheap ((WT *)timers, timercnt - 1); 2559 ANHE_at_cache (timers [ev_active (w)]);
2560 upheap (timers, ev_active (w));
1296 2561
2562 EV_FREQUENT_CHECK;
2563
1297 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2564 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1298} 2565}
1299 2566
1300void 2567void noinline
1301ev_timer_stop (EV_P_ struct ev_timer *w) 2568ev_timer_stop (EV_P_ ev_timer *w)
1302{ 2569{
1303 ev_clear_pending (EV_A_ (W)w); 2570 clear_pending (EV_A_ (W)w);
1304 if (!ev_is_active (w)) 2571 if (expect_false (!ev_is_active (w)))
1305 return; 2572 return;
1306 2573
2574 EV_FREQUENT_CHECK;
2575
2576 {
2577 int active = ev_active (w);
2578
1307 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2579 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1308 2580
1309 if (((W)w)->active < timercnt--) 2581 --timercnt;
2582
2583 if (expect_true (active < timercnt + HEAP0))
1310 { 2584 {
1311 timers [((W)w)->active - 1] = timers [timercnt]; 2585 timers [active] = timers [timercnt + HEAP0];
1312 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2586 adjustheap (timers, timercnt, active);
1313 } 2587 }
2588 }
1314 2589
1315 ((WT)w)->at = w->repeat; 2590 EV_FREQUENT_CHECK;
2591
2592 ev_at (w) -= mn_now;
1316 2593
1317 ev_stop (EV_A_ (W)w); 2594 ev_stop (EV_A_ (W)w);
1318} 2595}
1319 2596
1320void 2597void noinline
1321ev_timer_again (EV_P_ struct ev_timer *w) 2598ev_timer_again (EV_P_ ev_timer *w)
1322{ 2599{
2600 EV_FREQUENT_CHECK;
2601
1323 if (ev_is_active (w)) 2602 if (ev_is_active (w))
1324 { 2603 {
1325 if (w->repeat) 2604 if (w->repeat)
1326 { 2605 {
1327 ((WT)w)->at = mn_now + w->repeat; 2606 ev_at (w) = mn_now + w->repeat;
1328 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2607 ANHE_at_cache (timers [ev_active (w)]);
2608 adjustheap (timers, timercnt, ev_active (w));
1329 } 2609 }
1330 else 2610 else
1331 ev_timer_stop (EV_A_ w); 2611 ev_timer_stop (EV_A_ w);
1332 } 2612 }
1333 else if (w->repeat) 2613 else if (w->repeat)
2614 {
2615 ev_at (w) = w->repeat;
1334 ev_timer_start (EV_A_ w); 2616 ev_timer_start (EV_A_ w);
1335} 2617 }
1336 2618
1337void 2619 EV_FREQUENT_CHECK;
2620}
2621
2622ev_tstamp
2623ev_timer_remaining (EV_P_ ev_timer *w)
2624{
2625 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2626}
2627
2628#if EV_PERIODIC_ENABLE
2629void noinline
1338ev_periodic_start (EV_P_ struct ev_periodic *w) 2630ev_periodic_start (EV_P_ ev_periodic *w)
1339{ 2631{
1340 if (ev_is_active (w)) 2632 if (expect_false (ev_is_active (w)))
1341 return; 2633 return;
1342 2634
1343 if (w->reschedule_cb) 2635 if (w->reschedule_cb)
1344 ((WT)w)->at = w->reschedule_cb (w, rt_now); 2636 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1345 else if (w->interval) 2637 else if (w->interval)
1346 { 2638 {
1347 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2639 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1348 /* this formula differs from the one in periodic_reify because we do not always round up */ 2640 /* this formula differs from the one in periodic_reify because we do not always round up */
1349 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 2641 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1350 } 2642 }
2643 else
2644 ev_at (w) = w->offset;
1351 2645
2646 EV_FREQUENT_CHECK;
2647
2648 ++periodiccnt;
1352 ev_start (EV_A_ (W)w, ++periodiccnt); 2649 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1353 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2650 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1354 periodics [periodiccnt - 1] = w; 2651 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1355 upheap ((WT *)periodics, periodiccnt - 1); 2652 ANHE_at_cache (periodics [ev_active (w)]);
2653 upheap (periodics, ev_active (w));
1356 2654
2655 EV_FREQUENT_CHECK;
2656
1357 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2657 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1358} 2658}
1359 2659
1360void 2660void noinline
1361ev_periodic_stop (EV_P_ struct ev_periodic *w) 2661ev_periodic_stop (EV_P_ ev_periodic *w)
1362{ 2662{
1363 ev_clear_pending (EV_A_ (W)w); 2663 clear_pending (EV_A_ (W)w);
1364 if (!ev_is_active (w)) 2664 if (expect_false (!ev_is_active (w)))
1365 return; 2665 return;
1366 2666
2667 EV_FREQUENT_CHECK;
2668
2669 {
2670 int active = ev_active (w);
2671
1367 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2672 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1368 2673
1369 if (((W)w)->active < periodiccnt--) 2674 --periodiccnt;
2675
2676 if (expect_true (active < periodiccnt + HEAP0))
1370 { 2677 {
1371 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2678 periodics [active] = periodics [periodiccnt + HEAP0];
1372 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2679 adjustheap (periodics, periodiccnt, active);
1373 } 2680 }
2681 }
2682
2683 EV_FREQUENT_CHECK;
1374 2684
1375 ev_stop (EV_A_ (W)w); 2685 ev_stop (EV_A_ (W)w);
1376} 2686}
1377 2687
1378void 2688void noinline
1379ev_periodic_again (EV_P_ struct ev_periodic *w) 2689ev_periodic_again (EV_P_ ev_periodic *w)
1380{ 2690{
2691 /* TODO: use adjustheap and recalculation */
1381 ev_periodic_stop (EV_A_ w); 2692 ev_periodic_stop (EV_A_ w);
1382 ev_periodic_start (EV_A_ w); 2693 ev_periodic_start (EV_A_ w);
1383} 2694}
1384 2695#endif
1385void
1386ev_idle_start (EV_P_ struct ev_idle *w)
1387{
1388 if (ev_is_active (w))
1389 return;
1390
1391 ev_start (EV_A_ (W)w, ++idlecnt);
1392 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1393 idles [idlecnt - 1] = w;
1394}
1395
1396void
1397ev_idle_stop (EV_P_ struct ev_idle *w)
1398{
1399 ev_clear_pending (EV_A_ (W)w);
1400 if (ev_is_active (w))
1401 return;
1402
1403 idles [((W)w)->active - 1] = idles [--idlecnt];
1404 ev_stop (EV_A_ (W)w);
1405}
1406
1407void
1408ev_prepare_start (EV_P_ struct ev_prepare *w)
1409{
1410 if (ev_is_active (w))
1411 return;
1412
1413 ev_start (EV_A_ (W)w, ++preparecnt);
1414 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1415 prepares [preparecnt - 1] = w;
1416}
1417
1418void
1419ev_prepare_stop (EV_P_ struct ev_prepare *w)
1420{
1421 ev_clear_pending (EV_A_ (W)w);
1422 if (ev_is_active (w))
1423 return;
1424
1425 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1426 ev_stop (EV_A_ (W)w);
1427}
1428
1429void
1430ev_check_start (EV_P_ struct ev_check *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++checkcnt);
1436 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1437 checks [checkcnt - 1] = w;
1438}
1439
1440void
1441ev_check_stop (EV_P_ struct ev_check *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (ev_is_active (w))
1445 return;
1446
1447 checks [((W)w)->active - 1] = checks [--checkcnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450 2696
1451#ifndef SA_RESTART 2697#ifndef SA_RESTART
1452# define SA_RESTART 0 2698# define SA_RESTART 0
1453#endif 2699#endif
1454 2700
1455void 2701void noinline
1456ev_signal_start (EV_P_ struct ev_signal *w) 2702ev_signal_start (EV_P_ ev_signal *w)
1457{ 2703{
2704 if (expect_false (ev_is_active (w)))
2705 return;
2706
2707 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2708
1458#if EV_MULTIPLICITY 2709#if EV_MULTIPLICITY
1459 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2710 assert (("libev: a signal must not be attached to two different loops",
2711 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2712
2713 signals [w->signum - 1].loop = EV_A;
2714#endif
2715
2716 EV_FREQUENT_CHECK;
2717
2718#if EV_USE_SIGNALFD
2719 if (sigfd == -2)
2720 {
2721 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2722 if (sigfd < 0 && errno == EINVAL)
2723 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2724
2725 if (sigfd >= 0)
2726 {
2727 fd_intern (sigfd); /* doing it twice will not hurt */
2728
2729 sigemptyset (&sigfd_set);
2730
2731 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2732 ev_set_priority (&sigfd_w, EV_MAXPRI);
2733 ev_io_start (EV_A_ &sigfd_w);
2734 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2735 }
2736 }
2737
2738 if (sigfd >= 0)
2739 {
2740 /* TODO: check .head */
2741 sigaddset (&sigfd_set, w->signum);
2742 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2743
2744 signalfd (sigfd, &sigfd_set, 0);
2745 }
2746#endif
2747
2748 ev_start (EV_A_ (W)w, 1);
2749 wlist_add (&signals [w->signum - 1].head, (WL)w);
2750
2751 if (!((WL)w)->next)
2752# if EV_USE_SIGNALFD
2753 if (sigfd < 0) /*TODO*/
1460#endif 2754# endif
1461 if (ev_is_active (w)) 2755 {
2756# if _WIN32
2757 signal (w->signum, ev_sighandler);
2758# else
2759 struct sigaction sa;
2760
2761 evpipe_init (EV_A);
2762
2763 sa.sa_handler = ev_sighandler;
2764 sigfillset (&sa.sa_mask);
2765 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2766 sigaction (w->signum, &sa, 0);
2767
2768 sigemptyset (&sa.sa_mask);
2769 sigaddset (&sa.sa_mask, w->signum);
2770 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2771#endif
2772 }
2773
2774 EV_FREQUENT_CHECK;
2775}
2776
2777void noinline
2778ev_signal_stop (EV_P_ ev_signal *w)
2779{
2780 clear_pending (EV_A_ (W)w);
2781 if (expect_false (!ev_is_active (w)))
1462 return; 2782 return;
1463 2783
1464 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2784 EV_FREQUENT_CHECK;
2785
2786 wlist_del (&signals [w->signum - 1].head, (WL)w);
2787 ev_stop (EV_A_ (W)w);
2788
2789 if (!signals [w->signum - 1].head)
2790 {
2791#if EV_MULTIPLICITY
2792 signals [w->signum - 1].loop = 0; /* unattach from signal */
2793#endif
2794#if EV_USE_SIGNALFD
2795 if (sigfd >= 0)
2796 {
2797 sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2798 sigdelset (&sigfd_set, w->signum);
2799 signalfd (sigfd, &sigfd_set, 0);
2800 sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2801 /*TODO: maybe unblock signal? */
2802 }
2803 else
2804#endif
2805 signal (w->signum, SIG_DFL);
2806 }
2807
2808 EV_FREQUENT_CHECK;
2809}
2810
2811void
2812ev_child_start (EV_P_ ev_child *w)
2813{
2814#if EV_MULTIPLICITY
2815 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2816#endif
2817 if (expect_false (ev_is_active (w)))
2818 return;
2819
2820 EV_FREQUENT_CHECK;
1465 2821
1466 ev_start (EV_A_ (W)w, 1); 2822 ev_start (EV_A_ (W)w, 1);
1467 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2823 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1468 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1469 2824
1470 if (!((WL)w)->next) 2825 EV_FREQUENT_CHECK;
2826}
2827
2828void
2829ev_child_stop (EV_P_ ev_child *w)
2830{
2831 clear_pending (EV_A_ (W)w);
2832 if (expect_false (!ev_is_active (w)))
2833 return;
2834
2835 EV_FREQUENT_CHECK;
2836
2837 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2838 ev_stop (EV_A_ (W)w);
2839
2840 EV_FREQUENT_CHECK;
2841}
2842
2843#if EV_STAT_ENABLE
2844
2845# ifdef _WIN32
2846# undef lstat
2847# define lstat(a,b) _stati64 (a,b)
2848# endif
2849
2850#define DEF_STAT_INTERVAL 5.0074891
2851#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2852#define MIN_STAT_INTERVAL 0.1074891
2853
2854static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2855
2856#if EV_USE_INOTIFY
2857# define EV_INOTIFY_BUFSIZE 8192
2858
2859static void noinline
2860infy_add (EV_P_ ev_stat *w)
2861{
2862 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);
2863
2864 if (w->wd < 0)
2865 {
2866 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2867 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2868
2869 /* monitor some parent directory for speedup hints */
2870 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2871 /* but an efficiency issue only */
2872 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2873 {
2874 char path [4096];
2875 strcpy (path, w->path);
2876
2877 do
2878 {
2879 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2880 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2881
2882 char *pend = strrchr (path, '/');
2883
2884 if (!pend || pend == path)
2885 break;
2886
2887 *pend = 0;
2888 w->wd = inotify_add_watch (fs_fd, path, mask);
2889 }
2890 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2891 }
1471 { 2892 }
1472#if WIN32 2893
1473 signal (w->signum, sighandler); 2894 if (w->wd >= 0)
2895 {
2896 struct statfs sfs;
2897
2898 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2899
2900 /* now local changes will be tracked by inotify, but remote changes won't */
2901 /* unless the filesystem it known to be local, we therefore still poll */
2902 /* also do poll on <2.6.25, but with normal frequency */
2903
2904 if (fs_2625 && !statfs (w->path, &sfs))
2905 if (sfs.f_type == 0x1373 /* devfs */
2906 || sfs.f_type == 0xEF53 /* ext2/3 */
2907 || sfs.f_type == 0x3153464a /* jfs */
2908 || sfs.f_type == 0x52654973 /* reiser3 */
2909 || sfs.f_type == 0x01021994 /* tempfs */
2910 || sfs.f_type == 0x58465342 /* xfs */)
2911 return;
2912
2913 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2914 ev_timer_again (EV_A_ &w->timer);
2915 }
2916}
2917
2918static void noinline
2919infy_del (EV_P_ ev_stat *w)
2920{
2921 int slot;
2922 int wd = w->wd;
2923
2924 if (wd < 0)
2925 return;
2926
2927 w->wd = -2;
2928 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2929 wlist_del (&fs_hash [slot].head, (WL)w);
2930
2931 /* remove this watcher, if others are watching it, they will rearm */
2932 inotify_rm_watch (fs_fd, wd);
2933}
2934
2935static void noinline
2936infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2937{
2938 if (slot < 0)
2939 /* overflow, need to check for all hash slots */
2940 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2941 infy_wd (EV_A_ slot, wd, ev);
2942 else
2943 {
2944 WL w_;
2945
2946 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2947 {
2948 ev_stat *w = (ev_stat *)w_;
2949 w_ = w_->next; /* lets us remove this watcher and all before it */
2950
2951 if (w->wd == wd || wd == -1)
2952 {
2953 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2954 {
2955 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2956 w->wd = -1;
2957 infy_add (EV_A_ w); /* re-add, no matter what */
2958 }
2959
2960 stat_timer_cb (EV_A_ &w->timer, 0);
2961 }
2962 }
2963 }
2964}
2965
2966static void
2967infy_cb (EV_P_ ev_io *w, int revents)
2968{
2969 char buf [EV_INOTIFY_BUFSIZE];
2970 struct inotify_event *ev = (struct inotify_event *)buf;
2971 int ofs;
2972 int len = read (fs_fd, buf, sizeof (buf));
2973
2974 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2975 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2976}
2977
2978inline_size void
2979check_2625 (EV_P)
2980{
2981 /* kernels < 2.6.25 are borked
2982 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2983 */
2984 struct utsname buf;
2985 int major, minor, micro;
2986
2987 if (uname (&buf))
2988 return;
2989
2990 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2991 return;
2992
2993 if (major < 2
2994 || (major == 2 && minor < 6)
2995 || (major == 2 && minor == 6 && micro < 25))
2996 return;
2997
2998 fs_2625 = 1;
2999}
3000
3001inline_size int
3002infy_newfd (void)
3003{
3004#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3005 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3006 if (fd >= 0)
3007 return fd;
3008#endif
3009 return inotify_init ();
3010}
3011
3012inline_size void
3013infy_init (EV_P)
3014{
3015 if (fs_fd != -2)
3016 return;
3017
3018 fs_fd = -1;
3019
3020 check_2625 (EV_A);
3021
3022 fs_fd = infy_newfd ();
3023
3024 if (fs_fd >= 0)
3025 {
3026 fd_intern (fs_fd);
3027 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3028 ev_set_priority (&fs_w, EV_MAXPRI);
3029 ev_io_start (EV_A_ &fs_w);
3030 }
3031}
3032
3033inline_size void
3034infy_fork (EV_P)
3035{
3036 int slot;
3037
3038 if (fs_fd < 0)
3039 return;
3040
3041 ev_io_stop (EV_A_ &fs_w);
3042 close (fs_fd);
3043 fs_fd = infy_newfd ();
3044
3045 if (fs_fd >= 0)
3046 {
3047 fd_intern (fs_fd);
3048 ev_io_set (&fs_w, fs_fd, EV_READ);
3049 ev_io_start (EV_A_ &fs_w);
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)
1474#else 3076#else
1475 struct sigaction sa; 3077# define EV_LSTAT(p,b) lstat (p, b)
1476 sa.sa_handler = sighandler;
1477 sigfillset (&sa.sa_mask);
1478 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1479 sigaction (w->signum, &sa, 0);
1480#endif 3078#endif
1481 }
1482}
1483 3079
1484void 3080void
1485ev_signal_stop (EV_P_ struct ev_signal *w) 3081ev_stat_stat (EV_P_ ev_stat *w)
1486{ 3082{
1487 ev_clear_pending (EV_A_ (W)w); 3083 if (lstat (w->path, &w->attr) < 0)
1488 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)))
1489 return; 3130 return;
1490 3131
1491 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
1492 ev_stop (EV_A_ (W)w); 3168 ev_stop (EV_A_ (W)w);
1493 3169
1494 if (!signals [w->signum - 1].head) 3170 EV_FREQUENT_CHECK;
1495 signal (w->signum, SIG_DFL);
1496} 3171}
3172#endif
1497 3173
3174#if EV_IDLE_ENABLE
1498void 3175void
1499ev_child_start (EV_P_ struct ev_child *w) 3176ev_idle_start (EV_P_ ev_idle *w)
1500{ 3177{
1501#if EV_MULTIPLICITY
1502 assert (("child watchers are only supported in the default loop", loop == default_loop));
1503#endif
1504 if (ev_is_active (w)) 3178 if (expect_false (ev_is_active (w)))
1505 return; 3179 return;
1506 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
1507 ev_start (EV_A_ (W)w, 1); 3378 ev_start (EV_A_ (W)w, 1);
1508 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1509}
1510 3379
3380 EV_FREQUENT_CHECK;
3381}
3382
1511void 3383void
1512ev_child_stop (EV_P_ struct ev_child *w) 3384ev_embed_stop (EV_P_ ev_embed *w)
1513{ 3385{
1514 ev_clear_pending (EV_A_ (W)w); 3386 clear_pending (EV_A_ (W)w);
1515 if (ev_is_active (w)) 3387 if (expect_false (!ev_is_active (w)))
1516 return; 3388 return;
1517 3389
1518 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
1519 ev_stop (EV_A_ (W)w); 3432 ev_stop (EV_A_ (W)w);
3433
3434 EV_FREQUENT_CHECK;
1520} 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
1521 3484
1522/*****************************************************************************/ 3485/*****************************************************************************/
1523 3486
1524struct ev_once 3487struct ev_once
1525{ 3488{
1526 struct ev_io io; 3489 ev_io io;
1527 struct ev_timer to; 3490 ev_timer to;
1528 void (*cb)(int revents, void *arg); 3491 void (*cb)(int revents, void *arg);
1529 void *arg; 3492 void *arg;
1530}; 3493};
1531 3494
1532static void 3495static void
1533once_cb (EV_P_ struct ev_once *once, int revents) 3496once_cb (EV_P_ struct ev_once *once, int revents)
1534{ 3497{
1535 void (*cb)(int revents, void *arg) = once->cb; 3498 void (*cb)(int revents, void *arg) = once->cb;
1536 void *arg = once->arg; 3499 void *arg = once->arg;
1537 3500
1538 ev_io_stop (EV_A_ &once->io); 3501 ev_io_stop (EV_A_ &once->io);
1539 ev_timer_stop (EV_A_ &once->to); 3502 ev_timer_stop (EV_A_ &once->to);
1540 ev_free (once); 3503 ev_free (once);
1541 3504
1542 cb (revents, arg); 3505 cb (revents, arg);
1543} 3506}
1544 3507
1545static void 3508static void
1546once_cb_io (EV_P_ struct ev_io *w, int revents) 3509once_cb_io (EV_P_ ev_io *w, int revents)
1547{ 3510{
1548 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));
1549} 3514}
1550 3515
1551static void 3516static void
1552once_cb_to (EV_P_ struct ev_timer *w, int revents) 3517once_cb_to (EV_P_ ev_timer *w, int revents)
1553{ 3518{
1554 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));
1555} 3522}
1556 3523
1557void 3524void
1558ev_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)
1559{ 3526{
1560 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));
1561 3528
1562 if (!once) 3529 if (expect_false (!once))
3530 {
1563 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3531 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1564 else 3532 return;
1565 { 3533 }
3534
1566 once->cb = cb; 3535 once->cb = cb;
1567 once->arg = arg; 3536 once->arg = arg;
1568 3537
1569 ev_watcher_init (&once->io, once_cb_io); 3538 ev_init (&once->io, once_cb_io);
1570 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; )
1571 { 3565 {
1572 ev_io_set (&once->io, fd, events); 3566 wn = wl->next;
1573 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;
1574 } 3586 }
1575 3587
1576 ev_watcher_init (&once->to, once_cb_to); 3588 if (types & (EV_TIMER | EV_STAT))
1577 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)
1578 { 3593 {
1579 ev_timer_set (&once->to, timeout, 0.); 3594 if (types & EV_STAT)
1580 ev_timer_start (EV_A_ &once->to); 3595 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1581 } 3596 }
1582 } 3597 else
1583} 3598#endif
3599 if (types & EV_TIMER)
3600 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1584 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 */
3658}
3659#endif
3660
3661#if EV_MULTIPLICITY
3662 #include "ev_wrap.h"
3663#endif
3664
3665#ifdef __cplusplus
3666}
3667#endif
3668

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