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Comparing libev/ev.c (file contents):
Revision 1.123 by root, Sat Nov 17 02:23:54 2007 UTC vs.
Revision 1.312 by root, Wed Aug 12 18:48:17 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
38 65
39# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
42# endif 69# endif
43# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
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
45# endif 79# endif
46# endif 80# endif
47 81
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
50# endif 88# endif
51 89
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
53# define EV_USE_POLL 1 92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif
54# endif 96# endif
55 97
56# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
57# define EV_USE_EPOLL 1 100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
103# endif
58# endif 104# endif
59 105
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
111# endif
62# endif 112# endif
63 113
64# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT) 114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
65# define EV_USE_PORT 1 116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
119# endif
66# 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
67 129
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
68#endif 154#endif
69 155
70#include <math.h> 156#include <math.h>
71#include <stdlib.h> 157#include <stdlib.h>
72#include <fcntl.h> 158#include <fcntl.h>
… …
79#include <sys/types.h> 165#include <sys/types.h>
80#include <time.h> 166#include <time.h>
81 167
82#include <signal.h> 168#include <signal.h>
83 169
170#ifdef EV_H
171# include EV_H
172#else
173# include "ev.h"
174#endif
175
84#ifndef _WIN32 176#ifndef _WIN32
85# include <unistd.h>
86# include <sys/time.h> 177# include <sys/time.h>
87# include <sys/wait.h> 178# include <sys/wait.h>
179# include <unistd.h>
88#else 180#else
181# include <io.h>
89# define WIN32_LEAN_AND_MEAN 182# define WIN32_LEAN_AND_MEAN
90# include <windows.h> 183# include <windows.h>
91# ifndef EV_SELECT_IS_WINSOCKET 184# ifndef EV_SELECT_IS_WINSOCKET
92# define EV_SELECT_IS_WINSOCKET 1 185# define EV_SELECT_IS_WINSOCKET 1
93# endif 186# endif
94#endif 187#endif
95 188
96/**/ 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
97 225
98#ifndef EV_USE_MONOTONIC 226#ifndef EV_USE_MONOTONIC
227# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
228# define EV_USE_MONOTONIC 1
229# else
99# define EV_USE_MONOTONIC 0 230# define EV_USE_MONOTONIC 0
231# endif
100#endif 232#endif
101 233
102#ifndef EV_USE_REALTIME 234#ifndef EV_USE_REALTIME
103# define EV_USE_REALTIME 0 235# 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
104#endif 244#endif
105 245
106#ifndef EV_USE_SELECT 246#ifndef EV_USE_SELECT
107# define EV_USE_SELECT 1 247# define EV_USE_SELECT 1
108#endif 248#endif
… …
114# define EV_USE_POLL 1 254# define EV_USE_POLL 1
115# endif 255# endif
116#endif 256#endif
117 257
118#ifndef EV_USE_EPOLL 258#ifndef EV_USE_EPOLL
259# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
260# define EV_USE_EPOLL 1
261# else
119# define EV_USE_EPOLL 0 262# define EV_USE_EPOLL 0
263# endif
120#endif 264#endif
121 265
122#ifndef EV_USE_KQUEUE 266#ifndef EV_USE_KQUEUE
123# define EV_USE_KQUEUE 0 267# define EV_USE_KQUEUE 0
124#endif 268#endif
125 269
126#ifndef EV_USE_PORT 270#ifndef EV_USE_PORT
127# define EV_USE_PORT 0 271# define EV_USE_PORT 0
128#endif 272#endif
129 273
130/**/ 274#ifndef EV_USE_INOTIFY
131 275# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
132/* darwin simply cannot be helped */ 276# define EV_USE_INOTIFY 1
133#ifdef __APPLE__ 277# else
134# undef EV_USE_POLL 278# define EV_USE_INOTIFY 0
135# undef EV_USE_KQUEUE
136#endif 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__ >= 9))
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 */
137 347
138#ifndef CLOCK_MONOTONIC 348#ifndef CLOCK_MONOTONIC
139# undef EV_USE_MONOTONIC 349# undef EV_USE_MONOTONIC
140# define EV_USE_MONOTONIC 0 350# define EV_USE_MONOTONIC 0
141#endif 351#endif
… …
143#ifndef CLOCK_REALTIME 353#ifndef CLOCK_REALTIME
144# undef EV_USE_REALTIME 354# undef EV_USE_REALTIME
145# define EV_USE_REALTIME 0 355# define EV_USE_REALTIME 0
146#endif 356#endif
147 357
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
148#if EV_SELECT_IS_WINSOCKET 380#if EV_SELECT_IS_WINSOCKET
149# include <winsock.h> 381# include <winsock.h>
150#endif 382#endif
151 383
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# include <sys/signalfd.h>
408#endif
409
152/**/ 410/**/
411
412#if EV_VERIFY >= 3
413# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
414#else
415# define EV_FREQUENT_CHECK do { } while (0)
416#endif
417
418/*
419 * This is used to avoid floating point rounding problems.
420 * It is added to ev_rt_now when scheduling periodics
421 * to ensure progress, time-wise, even when rounding
422 * errors are against us.
423 * This value is good at least till the year 4000.
424 * Better solutions welcome.
425 */
426#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
153 427
154#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 428#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
155#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 429#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
156#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
157/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 430/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
158 431
159#ifdef EV_H
160# include EV_H
161#else
162# include "ev.h"
163#endif
164
165#if __GNUC__ >= 3 432#if __GNUC__ >= 4
166# define expect(expr,value) __builtin_expect ((expr),(value)) 433# define expect(expr,value) __builtin_expect ((expr),(value))
167# define inline static inline 434# define noinline __attribute__ ((noinline))
168#else 435#else
169# define expect(expr,value) (expr) 436# define expect(expr,value) (expr)
170# define inline static 437# define noinline
438# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
439# define inline
440# endif
171#endif 441#endif
172 442
173#define expect_false(expr) expect ((expr) != 0, 0) 443#define expect_false(expr) expect ((expr) != 0, 0)
174#define expect_true(expr) expect ((expr) != 0, 1) 444#define expect_true(expr) expect ((expr) != 0, 1)
445#define inline_size static inline
175 446
447#if EV_MINIMAL
448# define inline_speed static noinline
449#else
450# define inline_speed static inline
451#endif
452
176#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 453#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
454
455#if EV_MINPRI == EV_MAXPRI
456# define ABSPRI(w) (((W)w), 0)
457#else
177#define ABSPRI(w) ((w)->priority - EV_MINPRI) 458# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
459#endif
178 460
179#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 461#define EMPTY /* required for microsofts broken pseudo-c compiler */
180#define EMPTY2(a,b) /* used to suppress some warnings */ 462#define EMPTY2(a,b) /* used to suppress some warnings */
181 463
182typedef struct ev_watcher *W; 464typedef ev_watcher *W;
183typedef struct ev_watcher_list *WL; 465typedef ev_watcher_list *WL;
184typedef struct ev_watcher_time *WT; 466typedef ev_watcher_time *WT;
185 467
468#define ev_active(w) ((W)(w))->active
469#define ev_at(w) ((WT)(w))->at
470
471#if EV_USE_REALTIME
472/* sig_atomic_t is used to avoid per-thread variables or locking but still */
473/* giving it a reasonably high chance of working on typical architetcures */
474static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
475#endif
476
477#if EV_USE_MONOTONIC
186static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 478static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
479#endif
187 480
188#ifdef _WIN32 481#ifdef _WIN32
189# include "ev_win32.c" 482# include "ev_win32.c"
190#endif 483#endif
191 484
192/*****************************************************************************/ 485/*****************************************************************************/
193 486
194static void (*syserr_cb)(const char *msg); 487static void (*syserr_cb)(const char *msg);
195 488
489void
196void ev_set_syserr_cb (void (*cb)(const char *msg)) 490ev_set_syserr_cb (void (*cb)(const char *msg))
197{ 491{
198 syserr_cb = cb; 492 syserr_cb = cb;
199} 493}
200 494
201static void 495static void noinline
202syserr (const char *msg) 496ev_syserr (const char *msg)
203{ 497{
204 if (!msg) 498 if (!msg)
205 msg = "(libev) system error"; 499 msg = "(libev) system error";
206 500
207 if (syserr_cb) 501 if (syserr_cb)
… …
211 perror (msg); 505 perror (msg);
212 abort (); 506 abort ();
213 } 507 }
214} 508}
215 509
510static void *
511ev_realloc_emul (void *ptr, long size)
512{
513 /* some systems, notably openbsd and darwin, fail to properly
514 * implement realloc (x, 0) (as required by both ansi c-98 and
515 * the single unix specification, so work around them here.
516 */
517
518 if (size)
519 return realloc (ptr, size);
520
521 free (ptr);
522 return 0;
523}
524
216static void *(*alloc)(void *ptr, long size); 525static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
217 526
527void
218void ev_set_allocator (void *(*cb)(void *ptr, long size)) 528ev_set_allocator (void *(*cb)(void *ptr, long size))
219{ 529{
220 alloc = cb; 530 alloc = cb;
221} 531}
222 532
223static void * 533inline_speed void *
224ev_realloc (void *ptr, long size) 534ev_realloc (void *ptr, long size)
225{ 535{
226 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 536 ptr = alloc (ptr, size);
227 537
228 if (!ptr && size) 538 if (!ptr && size)
229 { 539 {
230 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 540 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
231 abort (); 541 abort ();
… …
237#define ev_malloc(size) ev_realloc (0, (size)) 547#define ev_malloc(size) ev_realloc (0, (size))
238#define ev_free(ptr) ev_realloc ((ptr), 0) 548#define ev_free(ptr) ev_realloc ((ptr), 0)
239 549
240/*****************************************************************************/ 550/*****************************************************************************/
241 551
552/* set in reify when reification needed */
553#define EV_ANFD_REIFY 1
554
555/* file descriptor info structure */
242typedef struct 556typedef struct
243{ 557{
244 WL head; 558 WL head;
245 unsigned char events; 559 unsigned char events; /* the events watched for */
560 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
561 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
246 unsigned char reify; 562 unsigned char unused;
563#if EV_USE_EPOLL
564 unsigned int egen; /* generation counter to counter epoll bugs */
565#endif
247#if EV_SELECT_IS_WINSOCKET 566#if EV_SELECT_IS_WINSOCKET
248 SOCKET handle; 567 SOCKET handle;
249#endif 568#endif
250} ANFD; 569} ANFD;
251 570
571/* stores the pending event set for a given watcher */
252typedef struct 572typedef struct
253{ 573{
254 W w; 574 W w;
255 int events; 575 int events; /* the pending event set for the given watcher */
256} ANPENDING; 576} ANPENDING;
577
578#if EV_USE_INOTIFY
579/* hash table entry per inotify-id */
580typedef struct
581{
582 WL head;
583} ANFS;
584#endif
585
586/* Heap Entry */
587#if EV_HEAP_CACHE_AT
588 /* a heap element */
589 typedef struct {
590 ev_tstamp at;
591 WT w;
592 } ANHE;
593
594 #define ANHE_w(he) (he).w /* access watcher, read-write */
595 #define ANHE_at(he) (he).at /* access cached at, read-only */
596 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
597#else
598 /* a heap element */
599 typedef WT ANHE;
600
601 #define ANHE_w(he) (he)
602 #define ANHE_at(he) (he)->at
603 #define ANHE_at_cache(he)
604#endif
257 605
258#if EV_MULTIPLICITY 606#if EV_MULTIPLICITY
259 607
260 struct ev_loop 608 struct ev_loop
261 { 609 {
… …
279 627
280 static int ev_default_loop_ptr; 628 static int ev_default_loop_ptr;
281 629
282#endif 630#endif
283 631
632#if EV_MINIMAL < 2
633# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
634# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
635# define EV_INVOKE_PENDING invoke_cb (EV_A)
636#else
637# define EV_RELEASE_CB (void)0
638# define EV_ACQUIRE_CB (void)0
639# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
640#endif
641
642#define EVUNLOOP_RECURSE 0x80
643
284/*****************************************************************************/ 644/*****************************************************************************/
285 645
646#ifndef EV_HAVE_EV_TIME
286ev_tstamp 647ev_tstamp
287ev_time (void) 648ev_time (void)
288{ 649{
289#if EV_USE_REALTIME 650#if EV_USE_REALTIME
651 if (expect_true (have_realtime))
652 {
290 struct timespec ts; 653 struct timespec ts;
291 clock_gettime (CLOCK_REALTIME, &ts); 654 clock_gettime (CLOCK_REALTIME, &ts);
292 return ts.tv_sec + ts.tv_nsec * 1e-9; 655 return ts.tv_sec + ts.tv_nsec * 1e-9;
293#else 656 }
657#endif
658
294 struct timeval tv; 659 struct timeval tv;
295 gettimeofday (&tv, 0); 660 gettimeofday (&tv, 0);
296 return tv.tv_sec + tv.tv_usec * 1e-6; 661 return tv.tv_sec + tv.tv_usec * 1e-6;
297#endif
298} 662}
663#endif
299 664
300inline ev_tstamp 665inline_size ev_tstamp
301get_clock (void) 666get_clock (void)
302{ 667{
303#if EV_USE_MONOTONIC 668#if EV_USE_MONOTONIC
304 if (expect_true (have_monotonic)) 669 if (expect_true (have_monotonic))
305 { 670 {
… …
318{ 683{
319 return ev_rt_now; 684 return ev_rt_now;
320} 685}
321#endif 686#endif
322 687
323#define array_roundsize(type,n) (((n) | 4) & ~3) 688void
689ev_sleep (ev_tstamp delay)
690{
691 if (delay > 0.)
692 {
693#if EV_USE_NANOSLEEP
694 struct timespec ts;
695
696 ts.tv_sec = (time_t)delay;
697 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
698
699 nanosleep (&ts, 0);
700#elif defined(_WIN32)
701 Sleep ((unsigned long)(delay * 1e3));
702#else
703 struct timeval tv;
704
705 tv.tv_sec = (time_t)delay;
706 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
707
708 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
709 /* something not guaranteed by newer posix versions, but guaranteed */
710 /* by older ones */
711 select (0, 0, 0, 0, &tv);
712#endif
713 }
714}
715
716/*****************************************************************************/
717
718#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
719
720/* find a suitable new size for the given array, */
721/* hopefully by rounding to a ncie-to-malloc size */
722inline_size int
723array_nextsize (int elem, int cur, int cnt)
724{
725 int ncur = cur + 1;
726
727 do
728 ncur <<= 1;
729 while (cnt > ncur);
730
731 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
732 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
733 {
734 ncur *= elem;
735 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
736 ncur = ncur - sizeof (void *) * 4;
737 ncur /= elem;
738 }
739
740 return ncur;
741}
742
743static noinline void *
744array_realloc (int elem, void *base, int *cur, int cnt)
745{
746 *cur = array_nextsize (elem, *cur, cnt);
747 return ev_realloc (base, elem * *cur);
748}
749
750#define array_init_zero(base,count) \
751 memset ((void *)(base), 0, sizeof (*(base)) * (count))
324 752
325#define array_needsize(type,base,cur,cnt,init) \ 753#define array_needsize(type,base,cur,cnt,init) \
326 if (expect_false ((cnt) > cur)) \ 754 if (expect_false ((cnt) > (cur))) \
327 { \ 755 { \
328 int newcnt = cur; \ 756 int ocur_ = (cur); \
329 do \ 757 (base) = (type *)array_realloc \
330 { \ 758 (sizeof (type), (base), &(cur), (cnt)); \
331 newcnt = array_roundsize (type, newcnt << 1); \ 759 init ((base) + (ocur_), (cur) - ocur_); \
332 } \
333 while ((cnt) > newcnt); \
334 \
335 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
336 init (base + cur, newcnt - cur); \
337 cur = newcnt; \
338 } 760 }
339 761
762#if 0
340#define array_slim(type,stem) \ 763#define array_slim(type,stem) \
341 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 764 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
342 { \ 765 { \
343 stem ## max = array_roundsize (stem ## cnt >> 1); \ 766 stem ## max = array_roundsize (stem ## cnt >> 1); \
344 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 767 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
345 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 768 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
346 } 769 }
770#endif
347 771
348#define array_free(stem, idx) \ 772#define array_free(stem, idx) \
349 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 773 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
350 774
351/*****************************************************************************/ 775/*****************************************************************************/
352 776
353static void 777/* dummy callback for pending events */
354anfds_init (ANFD *base, int count) 778static void noinline
779pendingcb (EV_P_ ev_prepare *w, int revents)
355{ 780{
356 while (count--)
357 {
358 base->head = 0;
359 base->events = EV_NONE;
360 base->reify = 0;
361
362 ++base;
363 }
364} 781}
365 782
366void 783void noinline
367ev_feed_event (EV_P_ void *w, int revents) 784ev_feed_event (EV_P_ void *w, int revents)
368{ 785{
369 W w_ = (W)w; 786 W w_ = (W)w;
787 int pri = ABSPRI (w_);
370 788
371 if (expect_false (w_->pending)) 789 if (expect_false (w_->pending))
790 pendings [pri][w_->pending - 1].events |= revents;
791 else
372 { 792 {
793 w_->pending = ++pendingcnt [pri];
794 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
795 pendings [pri][w_->pending - 1].w = w_;
373 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 796 pendings [pri][w_->pending - 1].events = revents;
374 return;
375 } 797 }
376
377 w_->pending = ++pendingcnt [ABSPRI (w_)];
378 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
379 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
380 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
381} 798}
382 799
383static void 800inline_speed void
801feed_reverse (EV_P_ W w)
802{
803 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
804 rfeeds [rfeedcnt++] = w;
805}
806
807inline_size void
808feed_reverse_done (EV_P_ int revents)
809{
810 do
811 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
812 while (rfeedcnt);
813}
814
815inline_speed void
384queue_events (EV_P_ W *events, int eventcnt, int type) 816queue_events (EV_P_ W *events, int eventcnt, int type)
385{ 817{
386 int i; 818 int i;
387 819
388 for (i = 0; i < eventcnt; ++i) 820 for (i = 0; i < eventcnt; ++i)
389 ev_feed_event (EV_A_ events [i], type); 821 ev_feed_event (EV_A_ events [i], type);
390} 822}
391 823
824/*****************************************************************************/
825
392inline void 826inline_speed void
393fd_event (EV_P_ int fd, int revents) 827fd_event_nc (EV_P_ int fd, int revents)
394{ 828{
395 ANFD *anfd = anfds + fd; 829 ANFD *anfd = anfds + fd;
396 struct ev_io *w; 830 ev_io *w;
397 831
398 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 832 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
399 { 833 {
400 int ev = w->events & revents; 834 int ev = w->events & revents;
401 835
402 if (ev) 836 if (ev)
403 ev_feed_event (EV_A_ (W)w, ev); 837 ev_feed_event (EV_A_ (W)w, ev);
404 } 838 }
405} 839}
406 840
841/* do not submit kernel events for fds that have reify set */
842/* because that means they changed while we were polling for new events */
843inline_speed void
844fd_event (EV_P_ int fd, int revents)
845{
846 ANFD *anfd = anfds + fd;
847
848 if (expect_true (!anfd->reify))
849 fd_event_nc (EV_A_ fd, revents);
850}
851
407void 852void
408ev_feed_fd_event (EV_P_ int fd, int revents) 853ev_feed_fd_event (EV_P_ int fd, int revents)
409{ 854{
855 if (fd >= 0 && fd < anfdmax)
410 fd_event (EV_A_ fd, revents); 856 fd_event_nc (EV_A_ fd, revents);
411} 857}
412 858
413/*****************************************************************************/ 859/* make sure the external fd watch events are in-sync */
414 860/* with the kernel/libev internal state */
415inline void 861inline_size void
416fd_reify (EV_P) 862fd_reify (EV_P)
417{ 863{
418 int i; 864 int i;
419 865
420 for (i = 0; i < fdchangecnt; ++i) 866 for (i = 0; i < fdchangecnt; ++i)
421 { 867 {
422 int fd = fdchanges [i]; 868 int fd = fdchanges [i];
423 ANFD *anfd = anfds + fd; 869 ANFD *anfd = anfds + fd;
424 struct ev_io *w; 870 ev_io *w;
425 871
426 int events = 0; 872 unsigned char events = 0;
427 873
428 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 874 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
429 events |= w->events; 875 events |= (unsigned char)w->events;
430 876
431#if EV_SELECT_IS_WINSOCKET 877#if EV_SELECT_IS_WINSOCKET
432 if (events) 878 if (events)
433 { 879 {
434 unsigned long argp; 880 unsigned long arg;
881 #ifdef EV_FD_TO_WIN32_HANDLE
882 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
883 #else
435 anfd->handle = _get_osfhandle (fd); 884 anfd->handle = _get_osfhandle (fd);
885 #endif
436 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 886 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
437 } 887 }
438#endif 888#endif
439 889
890 {
891 unsigned char o_events = anfd->events;
892 unsigned char o_reify = anfd->reify;
893
440 anfd->reify = 0; 894 anfd->reify = 0;
441
442 method_modify (EV_A_ fd, anfd->events, events);
443 anfd->events = events; 895 anfd->events = events;
896
897 if (o_events != events || o_reify & EV__IOFDSET)
898 backend_modify (EV_A_ fd, o_events, events);
899 }
444 } 900 }
445 901
446 fdchangecnt = 0; 902 fdchangecnt = 0;
447} 903}
448 904
449static void 905/* something about the given fd changed */
906inline_size void
450fd_change (EV_P_ int fd) 907fd_change (EV_P_ int fd, int flags)
451{ 908{
452 if (expect_false (anfds [fd].reify)) 909 unsigned char reify = anfds [fd].reify;
453 return;
454
455 anfds [fd].reify = 1; 910 anfds [fd].reify |= flags;
456 911
912 if (expect_true (!reify))
913 {
457 ++fdchangecnt; 914 ++fdchangecnt;
458 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 915 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
459 fdchanges [fdchangecnt - 1] = fd; 916 fdchanges [fdchangecnt - 1] = fd;
917 }
460} 918}
461 919
462static void 920/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
921inline_speed void
463fd_kill (EV_P_ int fd) 922fd_kill (EV_P_ int fd)
464{ 923{
465 struct ev_io *w; 924 ev_io *w;
466 925
467 while ((w = (struct ev_io *)anfds [fd].head)) 926 while ((w = (ev_io *)anfds [fd].head))
468 { 927 {
469 ev_io_stop (EV_A_ w); 928 ev_io_stop (EV_A_ w);
470 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 929 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
471 } 930 }
472} 931}
473 932
933/* check whether the given fd is atcually valid, for error recovery */
474inline int 934inline_size int
475fd_valid (int fd) 935fd_valid (int fd)
476{ 936{
477#ifdef _WIN32 937#ifdef _WIN32
478 return _get_osfhandle (fd) != -1; 938 return _get_osfhandle (fd) != -1;
479#else 939#else
480 return fcntl (fd, F_GETFD) != -1; 940 return fcntl (fd, F_GETFD) != -1;
481#endif 941#endif
482} 942}
483 943
484/* called on EBADF to verify fds */ 944/* called on EBADF to verify fds */
485static void 945static void noinline
486fd_ebadf (EV_P) 946fd_ebadf (EV_P)
487{ 947{
488 int fd; 948 int fd;
489 949
490 for (fd = 0; fd < anfdmax; ++fd) 950 for (fd = 0; fd < anfdmax; ++fd)
491 if (anfds [fd].events) 951 if (anfds [fd].events)
492 if (!fd_valid (fd) == -1 && errno == EBADF) 952 if (!fd_valid (fd) && errno == EBADF)
493 fd_kill (EV_A_ fd); 953 fd_kill (EV_A_ fd);
494} 954}
495 955
496/* called on ENOMEM in select/poll to kill some fds and retry */ 956/* called on ENOMEM in select/poll to kill some fds and retry */
497static void 957static void noinline
498fd_enomem (EV_P) 958fd_enomem (EV_P)
499{ 959{
500 int fd; 960 int fd;
501 961
502 for (fd = anfdmax; fd--; ) 962 for (fd = anfdmax; fd--; )
503 if (anfds [fd].events) 963 if (anfds [fd].events)
504 { 964 {
505 fd_kill (EV_A_ fd); 965 fd_kill (EV_A_ fd);
506 return; 966 break;
507 } 967 }
508} 968}
509 969
510/* usually called after fork if method needs to re-arm all fds from scratch */ 970/* usually called after fork if backend needs to re-arm all fds from scratch */
511static void 971static void noinline
512fd_rearm_all (EV_P) 972fd_rearm_all (EV_P)
513{ 973{
514 int fd; 974 int fd;
515 975
516 /* this should be highly optimised to not do anything but set a flag */
517 for (fd = 0; fd < anfdmax; ++fd) 976 for (fd = 0; fd < anfdmax; ++fd)
518 if (anfds [fd].events) 977 if (anfds [fd].events)
519 { 978 {
520 anfds [fd].events = 0; 979 anfds [fd].events = 0;
521 fd_change (EV_A_ fd); 980 anfds [fd].emask = 0;
981 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
522 } 982 }
523} 983}
524 984
525/*****************************************************************************/ 985/*****************************************************************************/
526 986
527static void 987/*
528upheap (WT *heap, int k) 988 * the heap functions want a real array index. array index 0 uis guaranteed to not
529{ 989 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
530 WT w = heap [k]; 990 * the branching factor of the d-tree.
991 */
531 992
532 while (k && heap [k >> 1]->at > w->at) 993/*
533 { 994 * at the moment we allow libev the luxury of two heaps,
534 heap [k] = heap [k >> 1]; 995 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
535 ((W)heap [k])->active = k + 1; 996 * which is more cache-efficient.
536 k >>= 1; 997 * the difference is about 5% with 50000+ watchers.
537 } 998 */
999#if EV_USE_4HEAP
538 1000
539 heap [k] = w; 1001#define DHEAP 4
540 ((W)heap [k])->active = k + 1; 1002#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1003#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1004#define UPHEAP_DONE(p,k) ((p) == (k))
541 1005
542} 1006/* away from the root */
543 1007inline_speed void
544static void
545downheap (WT *heap, int N, int k) 1008downheap (ANHE *heap, int N, int k)
546{ 1009{
547 WT w = heap [k]; 1010 ANHE he = heap [k];
1011 ANHE *E = heap + N + HEAP0;
548 1012
549 while (k < (N >> 1)) 1013 for (;;)
550 { 1014 {
551 int j = k << 1; 1015 ev_tstamp minat;
1016 ANHE *minpos;
1017 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
552 1018
553 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 1019 /* find minimum child */
1020 if (expect_true (pos + DHEAP - 1 < E))
554 ++j; 1021 {
555 1022 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
556 if (w->at <= heap [j]->at) 1023 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1024 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1025 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1026 }
1027 else if (pos < E)
1028 {
1029 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1030 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1031 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1032 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1033 }
1034 else
557 break; 1035 break;
558 1036
1037 if (ANHE_at (he) <= minat)
1038 break;
1039
1040 heap [k] = *minpos;
1041 ev_active (ANHE_w (*minpos)) = k;
1042
1043 k = minpos - heap;
1044 }
1045
1046 heap [k] = he;
1047 ev_active (ANHE_w (he)) = k;
1048}
1049
1050#else /* 4HEAP */
1051
1052#define HEAP0 1
1053#define HPARENT(k) ((k) >> 1)
1054#define UPHEAP_DONE(p,k) (!(p))
1055
1056/* away from the root */
1057inline_speed void
1058downheap (ANHE *heap, int N, int k)
1059{
1060 ANHE he = heap [k];
1061
1062 for (;;)
1063 {
1064 int c = k << 1;
1065
1066 if (c >= N + HEAP0)
1067 break;
1068
1069 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1070 ? 1 : 0;
1071
1072 if (ANHE_at (he) <= ANHE_at (heap [c]))
1073 break;
1074
559 heap [k] = heap [j]; 1075 heap [k] = heap [c];
560 ((W)heap [k])->active = k + 1; 1076 ev_active (ANHE_w (heap [k])) = k;
1077
561 k = j; 1078 k = c;
562 } 1079 }
563 1080
564 heap [k] = w; 1081 heap [k] = he;
565 ((W)heap [k])->active = k + 1; 1082 ev_active (ANHE_w (he)) = k;
566} 1083}
1084#endif
567 1085
1086/* towards the root */
1087inline_speed void
1088upheap (ANHE *heap, int k)
1089{
1090 ANHE he = heap [k];
1091
1092 for (;;)
1093 {
1094 int p = HPARENT (k);
1095
1096 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1097 break;
1098
1099 heap [k] = heap [p];
1100 ev_active (ANHE_w (heap [k])) = k;
1101 k = p;
1102 }
1103
1104 heap [k] = he;
1105 ev_active (ANHE_w (he)) = k;
1106}
1107
1108/* move an element suitably so it is in a correct place */
568inline void 1109inline_size void
569adjustheap (WT *heap, int N, int k) 1110adjustheap (ANHE *heap, int N, int k)
570{ 1111{
1112 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
571 upheap (heap, k); 1113 upheap (heap, k);
1114 else
572 downheap (heap, N, k); 1115 downheap (heap, N, k);
1116}
1117
1118/* rebuild the heap: this function is used only once and executed rarely */
1119inline_size void
1120reheap (ANHE *heap, int N)
1121{
1122 int i;
1123
1124 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1125 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1126 for (i = 0; i < N; ++i)
1127 upheap (heap, i + HEAP0);
573} 1128}
574 1129
575/*****************************************************************************/ 1130/*****************************************************************************/
576 1131
1132/* associate signal watchers to a signal signal */
577typedef struct 1133typedef struct
578{ 1134{
1135 EV_ATOMIC_T pending;
1136#if EV_MULTIPLICITY
1137 EV_P;
1138#endif
579 WL head; 1139 WL head;
580 sig_atomic_t volatile gotsig;
581} ANSIG; 1140} ANSIG;
582 1141
583static ANSIG *signals; 1142static ANSIG signals [EV_NSIG - 1];
584static int signalmax;
585 1143
586static int sigpipe [2]; 1144/*****************************************************************************/
587static sig_atomic_t volatile gotsig;
588static struct ev_io sigev;
589 1145
590static void 1146/* used to prepare libev internal fd's */
591signals_init (ANSIG *base, int count) 1147/* this is not fork-safe */
592{ 1148inline_speed void
593 while (count--)
594 {
595 base->head = 0;
596 base->gotsig = 0;
597
598 ++base;
599 }
600}
601
602static void
603sighandler (int signum)
604{
605#if _WIN32
606 signal (signum, sighandler);
607#endif
608
609 signals [signum - 1].gotsig = 1;
610
611 if (!gotsig)
612 {
613 int old_errno = errno;
614 gotsig = 1;
615 write (sigpipe [1], &signum, 1);
616 errno = old_errno;
617 }
618}
619
620void
621ev_feed_signal_event (EV_P_ int signum)
622{
623 WL w;
624
625#if EV_MULTIPLICITY
626 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
627#endif
628
629 --signum;
630
631 if (signum < 0 || signum >= signalmax)
632 return;
633
634 signals [signum].gotsig = 0;
635
636 for (w = signals [signum].head; w; w = w->next)
637 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
638}
639
640static void
641sigcb (EV_P_ struct ev_io *iow, int revents)
642{
643 int signum;
644
645 read (sigpipe [0], &revents, 1);
646 gotsig = 0;
647
648 for (signum = signalmax; signum--; )
649 if (signals [signum].gotsig)
650 ev_feed_signal_event (EV_A_ signum + 1);
651}
652
653static void
654fd_intern (int fd) 1149fd_intern (int fd)
655{ 1150{
656#ifdef _WIN32 1151#ifdef _WIN32
657 int arg = 1; 1152 unsigned long arg = 1;
658 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1153 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
659#else 1154#else
660 fcntl (fd, F_SETFD, FD_CLOEXEC); 1155 fcntl (fd, F_SETFD, FD_CLOEXEC);
661 fcntl (fd, F_SETFL, O_NONBLOCK); 1156 fcntl (fd, F_SETFL, O_NONBLOCK);
662#endif 1157#endif
663} 1158}
664 1159
1160static void noinline
1161evpipe_init (EV_P)
1162{
1163 if (!ev_is_active (&pipe_w))
1164 {
1165#if EV_USE_EVENTFD
1166 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1167 if (evfd < 0 && errno == EINVAL)
1168 evfd = eventfd (0, 0);
1169
1170 if (evfd >= 0)
1171 {
1172 evpipe [0] = -1;
1173 fd_intern (evfd); /* doing it twice doesn't hurt */
1174 ev_io_set (&pipe_w, evfd, EV_READ);
1175 }
1176 else
1177#endif
1178 {
1179 while (pipe (evpipe))
1180 ev_syserr ("(libev) error creating signal/async pipe");
1181
1182 fd_intern (evpipe [0]);
1183 fd_intern (evpipe [1]);
1184 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1185 }
1186
1187 ev_io_start (EV_A_ &pipe_w);
1188 ev_unref (EV_A); /* watcher should not keep loop alive */
1189 }
1190}
1191
1192inline_size void
1193evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1194{
1195 if (!*flag)
1196 {
1197 int old_errno = errno; /* save errno because write might clobber it */
1198
1199 *flag = 1;
1200
1201#if EV_USE_EVENTFD
1202 if (evfd >= 0)
1203 {
1204 uint64_t counter = 1;
1205 write (evfd, &counter, sizeof (uint64_t));
1206 }
1207 else
1208#endif
1209 write (evpipe [1], &old_errno, 1);
1210
1211 errno = old_errno;
1212 }
1213}
1214
1215/* called whenever the libev signal pipe */
1216/* got some events (signal, async) */
665static void 1217static void
666siginit (EV_P) 1218pipecb (EV_P_ ev_io *iow, int revents)
667{ 1219{
668 fd_intern (sigpipe [0]); 1220 int i;
669 fd_intern (sigpipe [1]);
670 1221
671 ev_io_set (&sigev, sigpipe [0], EV_READ); 1222#if EV_USE_EVENTFD
672 ev_io_start (EV_A_ &sigev); 1223 if (evfd >= 0)
673 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1224 {
1225 uint64_t counter;
1226 read (evfd, &counter, sizeof (uint64_t));
1227 }
1228 else
1229#endif
1230 {
1231 char dummy;
1232 read (evpipe [0], &dummy, 1);
1233 }
1234
1235 if (sig_pending)
1236 {
1237 sig_pending = 0;
1238
1239 for (i = EV_NSIG - 1; i--; )
1240 if (expect_false (signals [i].pending))
1241 ev_feed_signal_event (EV_A_ i + 1);
1242 }
1243
1244#if EV_ASYNC_ENABLE
1245 if (async_pending)
1246 {
1247 async_pending = 0;
1248
1249 for (i = asynccnt; i--; )
1250 if (asyncs [i]->sent)
1251 {
1252 asyncs [i]->sent = 0;
1253 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1254 }
1255 }
1256#endif
674} 1257}
675 1258
676/*****************************************************************************/ 1259/*****************************************************************************/
677 1260
678static struct ev_child *childs [PID_HASHSIZE]; 1261static void
1262ev_sighandler (int signum)
1263{
1264#if EV_MULTIPLICITY
1265 EV_P = signals [signum - 1].loop;
1266#endif
1267
1268#if _WIN32
1269 signal (signum, ev_sighandler);
1270#endif
1271
1272 signals [signum - 1].pending = 1;
1273 evpipe_write (EV_A_ &sig_pending);
1274}
1275
1276void noinline
1277ev_feed_signal_event (EV_P_ int signum)
1278{
1279 WL w;
1280
1281 if (expect_false (signum <= 0 || signum > EV_NSIG))
1282 return;
1283
1284 --signum;
1285
1286#if EV_MULTIPLICITY
1287 /* it is permissible to try to feed a signal to the wrong loop */
1288 /* or, likely more useful, feeding a signal nobody is waiting for */
1289
1290 if (expect_false (signals [signum].loop != EV_A))
1291 return;
1292#endif
1293
1294 signals [signum].pending = 0;
1295
1296 for (w = signals [signum].head; w; w = w->next)
1297 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1298}
1299
1300#if EV_USE_SIGNALFD
1301static void
1302sigfdcb (EV_P_ ev_io *iow, int revents)
1303{
1304 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1305
1306 for (;;)
1307 {
1308 ssize_t res = read (sigfd, si, sizeof (si));
1309
1310 /* not ISO-C, as res might be -1, but works with SuS */
1311 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1312 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1313
1314 if (res < (ssize_t)sizeof (si))
1315 break;
1316 }
1317}
1318#endif
1319
1320/*****************************************************************************/
1321
1322static WL childs [EV_PID_HASHSIZE];
679 1323
680#ifndef _WIN32 1324#ifndef _WIN32
681 1325
682static struct ev_signal childev; 1326static ev_signal childev;
1327
1328#ifndef WIFCONTINUED
1329# define WIFCONTINUED(status) 0
1330#endif
1331
1332/* handle a single child status event */
1333inline_speed void
1334child_reap (EV_P_ int chain, int pid, int status)
1335{
1336 ev_child *w;
1337 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1338
1339 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1340 {
1341 if ((w->pid == pid || !w->pid)
1342 && (!traced || (w->flags & 1)))
1343 {
1344 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1345 w->rpid = pid;
1346 w->rstatus = status;
1347 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1348 }
1349 }
1350}
683 1351
684#ifndef WCONTINUED 1352#ifndef WCONTINUED
685# define WCONTINUED 0 1353# define WCONTINUED 0
686#endif 1354#endif
687 1355
1356/* called on sigchld etc., calls waitpid */
688static void 1357static void
689child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
690{
691 struct ev_child *w;
692
693 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
694 if (w->pid == pid || !w->pid)
695 {
696 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
697 w->rpid = pid;
698 w->rstatus = status;
699 ev_feed_event (EV_A_ (W)w, EV_CHILD);
700 }
701}
702
703static void
704childcb (EV_P_ struct ev_signal *sw, int revents) 1358childcb (EV_P_ ev_signal *sw, int revents)
705{ 1359{
706 int pid, status; 1360 int pid, status;
707 1361
1362 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
708 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1363 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
709 { 1364 if (!WCONTINUED
1365 || errno != EINVAL
1366 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1367 return;
1368
710 /* make sure we are called again until all childs have been reaped */ 1369 /* make sure we are called again until all children have been reaped */
1370 /* we need to do it this way so that the callback gets called before we continue */
711 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1371 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
712 1372
713 child_reap (EV_A_ sw, pid, pid, status); 1373 child_reap (EV_A_ pid, pid, status);
1374 if (EV_PID_HASHSIZE > 1)
714 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1375 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
715 }
716} 1376}
717 1377
718#endif 1378#endif
719 1379
720/*****************************************************************************/ 1380/*****************************************************************************/
… …
746{ 1406{
747 return EV_VERSION_MINOR; 1407 return EV_VERSION_MINOR;
748} 1408}
749 1409
750/* return true if we are running with elevated privileges and should ignore env variables */ 1410/* return true if we are running with elevated privileges and should ignore env variables */
751static int 1411int inline_size
752enable_secure (void) 1412enable_secure (void)
753{ 1413{
754#ifdef _WIN32 1414#ifdef _WIN32
755 return 0; 1415 return 0;
756#else 1416#else
… …
758 || getgid () != getegid (); 1418 || getgid () != getegid ();
759#endif 1419#endif
760} 1420}
761 1421
762unsigned int 1422unsigned int
763ev_method (EV_P) 1423ev_supported_backends (void)
764{ 1424{
765 return method; 1425 unsigned int flags = 0;
766}
767 1426
768static void 1427 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1428 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1429 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1430 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1431 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1432
1433 return flags;
1434}
1435
1436unsigned int
1437ev_recommended_backends (void)
1438{
1439 unsigned int flags = ev_supported_backends ();
1440
1441#ifndef __NetBSD__
1442 /* kqueue is borked on everything but netbsd apparently */
1443 /* it usually doesn't work correctly on anything but sockets and pipes */
1444 flags &= ~EVBACKEND_KQUEUE;
1445#endif
1446#ifdef __APPLE__
1447 /* only select works correctly on that "unix-certified" platform */
1448 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1449 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1450#endif
1451
1452 return flags;
1453}
1454
1455unsigned int
1456ev_embeddable_backends (void)
1457{
1458 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1459
1460 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1461 /* please fix it and tell me how to detect the fix */
1462 flags &= ~EVBACKEND_EPOLL;
1463
1464 return flags;
1465}
1466
1467unsigned int
1468ev_backend (EV_P)
1469{
1470 return backend;
1471}
1472
1473#if EV_MINIMAL < 2
1474unsigned int
1475ev_loop_count (EV_P)
1476{
1477 return loop_count;
1478}
1479
1480unsigned int
1481ev_loop_depth (EV_P)
1482{
1483 return loop_depth;
1484}
1485
1486void
1487ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1488{
1489 io_blocktime = interval;
1490}
1491
1492void
1493ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1494{
1495 timeout_blocktime = interval;
1496}
1497
1498void
1499ev_set_userdata (EV_P_ void *data)
1500{
1501 userdata = data;
1502}
1503
1504void *
1505ev_userdata (EV_P)
1506{
1507 return userdata;
1508}
1509
1510void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1511{
1512 invoke_cb = invoke_pending_cb;
1513}
1514
1515void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1516{
1517 release_cb = release;
1518 acquire_cb = acquire;
1519}
1520#endif
1521
1522/* initialise a loop structure, must be zero-initialised */
1523static void noinline
769loop_init (EV_P_ unsigned int flags) 1524loop_init (EV_P_ unsigned int flags)
770{ 1525{
771 if (!method) 1526 if (!backend)
772 { 1527 {
1528#if EV_USE_REALTIME
1529 if (!have_realtime)
1530 {
1531 struct timespec ts;
1532
1533 if (!clock_gettime (CLOCK_REALTIME, &ts))
1534 have_realtime = 1;
1535 }
1536#endif
1537
773#if EV_USE_MONOTONIC 1538#if EV_USE_MONOTONIC
1539 if (!have_monotonic)
1540 {
1541 struct timespec ts;
1542
1543 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1544 have_monotonic = 1;
1545 }
1546#endif
1547
1548 /* pid check not overridable via env */
1549#ifndef _WIN32
1550 if (flags & EVFLAG_FORKCHECK)
1551 curpid = getpid ();
1552#endif
1553
1554 if (!(flags & EVFLAG_NOENV)
1555 && !enable_secure ()
1556 && getenv ("LIBEV_FLAGS"))
1557 flags = atoi (getenv ("LIBEV_FLAGS"));
1558
1559 ev_rt_now = ev_time ();
1560 mn_now = get_clock ();
1561 now_floor = mn_now;
1562 rtmn_diff = ev_rt_now - mn_now;
1563#if EV_MINIMAL < 2
1564 invoke_cb = ev_invoke_pending;
1565#endif
1566
1567 io_blocktime = 0.;
1568 timeout_blocktime = 0.;
1569 backend = 0;
1570 backend_fd = -1;
1571 sig_pending = 0;
1572#if EV_ASYNC_ENABLE
1573 async_pending = 0;
1574#endif
1575#if EV_USE_INOTIFY
1576 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1577#endif
1578#if EV_USE_SIGNALFD
1579 sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2;
1580#endif
1581
1582 if (!(flags & 0x0000ffffU))
1583 flags |= ev_recommended_backends ();
1584
1585#if EV_USE_PORT
1586 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1587#endif
1588#if EV_USE_KQUEUE
1589 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1590#endif
1591#if EV_USE_EPOLL
1592 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1593#endif
1594#if EV_USE_POLL
1595 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1596#endif
1597#if EV_USE_SELECT
1598 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1599#endif
1600
1601 ev_prepare_init (&pending_w, pendingcb);
1602
1603 ev_init (&pipe_w, pipecb);
1604 ev_set_priority (&pipe_w, EV_MAXPRI);
1605 }
1606}
1607
1608/* free up a loop structure */
1609static void noinline
1610loop_destroy (EV_P)
1611{
1612 int i;
1613
1614 if (ev_is_active (&pipe_w))
1615 {
1616 /*ev_ref (EV_A);*/
1617 /*ev_io_stop (EV_A_ &pipe_w);*/
1618
1619#if EV_USE_EVENTFD
1620 if (evfd >= 0)
1621 close (evfd);
1622#endif
1623
1624 if (evpipe [0] >= 0)
1625 {
1626 close (evpipe [0]);
1627 close (evpipe [1]);
1628 }
1629 }
1630
1631#if EV_USE_SIGNALFD
1632 if (ev_is_active (&sigfd_w))
1633 {
1634 /*ev_ref (EV_A);*/
1635 /*ev_io_stop (EV_A_ &sigfd_w);*/
1636
1637 close (sigfd);
1638 }
1639#endif
1640
1641#if EV_USE_INOTIFY
1642 if (fs_fd >= 0)
1643 close (fs_fd);
1644#endif
1645
1646 if (backend_fd >= 0)
1647 close (backend_fd);
1648
1649#if EV_USE_PORT
1650 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1651#endif
1652#if EV_USE_KQUEUE
1653 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1654#endif
1655#if EV_USE_EPOLL
1656 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1657#endif
1658#if EV_USE_POLL
1659 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1660#endif
1661#if EV_USE_SELECT
1662 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1663#endif
1664
1665 for (i = NUMPRI; i--; )
1666 {
1667 array_free (pending, [i]);
1668#if EV_IDLE_ENABLE
1669 array_free (idle, [i]);
1670#endif
1671 }
1672
1673 ev_free (anfds); anfds = 0; anfdmax = 0;
1674
1675 /* have to use the microsoft-never-gets-it-right macro */
1676 array_free (rfeed, EMPTY);
1677 array_free (fdchange, EMPTY);
1678 array_free (timer, EMPTY);
1679#if EV_PERIODIC_ENABLE
1680 array_free (periodic, EMPTY);
1681#endif
1682#if EV_FORK_ENABLE
1683 array_free (fork, EMPTY);
1684#endif
1685 array_free (prepare, EMPTY);
1686 array_free (check, EMPTY);
1687#if EV_ASYNC_ENABLE
1688 array_free (async, EMPTY);
1689#endif
1690
1691 backend = 0;
1692}
1693
1694#if EV_USE_INOTIFY
1695inline_size void infy_fork (EV_P);
1696#endif
1697
1698inline_size void
1699loop_fork (EV_P)
1700{
1701#if EV_USE_PORT
1702 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1703#endif
1704#if EV_USE_KQUEUE
1705 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1706#endif
1707#if EV_USE_EPOLL
1708 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1709#endif
1710#if EV_USE_INOTIFY
1711 infy_fork (EV_A);
1712#endif
1713
1714 if (ev_is_active (&pipe_w))
1715 {
1716 /* this "locks" the handlers against writing to the pipe */
1717 /* while we modify the fd vars */
1718 sig_pending = 1;
1719#if EV_ASYNC_ENABLE
1720 async_pending = 1;
1721#endif
1722
1723 ev_ref (EV_A);
1724 ev_io_stop (EV_A_ &pipe_w);
1725
1726#if EV_USE_EVENTFD
1727 if (evfd >= 0)
1728 close (evfd);
1729#endif
1730
1731 if (evpipe [0] >= 0)
1732 {
1733 close (evpipe [0]);
1734 close (evpipe [1]);
1735 }
1736
1737 evpipe_init (EV_A);
1738 /* now iterate over everything, in case we missed something */
1739 pipecb (EV_A_ &pipe_w, EV_READ);
1740 }
1741
1742 postfork = 0;
1743}
1744
1745#if EV_MULTIPLICITY
1746
1747struct ev_loop *
1748ev_loop_new (unsigned int flags)
1749{
1750 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1751
1752 memset (EV_A, 0, sizeof (struct ev_loop));
1753 loop_init (EV_A_ flags);
1754
1755 if (ev_backend (EV_A))
1756 return EV_A;
1757
1758 return 0;
1759}
1760
1761void
1762ev_loop_destroy (EV_P)
1763{
1764 loop_destroy (EV_A);
1765 ev_free (loop);
1766}
1767
1768void
1769ev_loop_fork (EV_P)
1770{
1771 postfork = 1; /* must be in line with ev_default_fork */
1772}
1773#endif /* multiplicity */
1774
1775#if EV_VERIFY
1776static void noinline
1777verify_watcher (EV_P_ W w)
1778{
1779 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1780
1781 if (w->pending)
1782 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1783}
1784
1785static void noinline
1786verify_heap (EV_P_ ANHE *heap, int N)
1787{
1788 int i;
1789
1790 for (i = HEAP0; i < N + HEAP0; ++i)
1791 {
1792 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1793 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1794 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1795
1796 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1797 }
1798}
1799
1800static void noinline
1801array_verify (EV_P_ W *ws, int cnt)
1802{
1803 while (cnt--)
1804 {
1805 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1806 verify_watcher (EV_A_ ws [cnt]);
1807 }
1808}
1809#endif
1810
1811#if EV_MINIMAL < 2
1812void
1813ev_loop_verify (EV_P)
1814{
1815#if EV_VERIFY
1816 int i;
1817 WL w;
1818
1819 assert (activecnt >= -1);
1820
1821 assert (fdchangemax >= fdchangecnt);
1822 for (i = 0; i < fdchangecnt; ++i)
1823 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1824
1825 assert (anfdmax >= 0);
1826 for (i = 0; i < anfdmax; ++i)
1827 for (w = anfds [i].head; w; w = w->next)
774 { 1828 {
775 struct timespec ts; 1829 verify_watcher (EV_A_ (W)w);
776 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1830 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
777 have_monotonic = 1; 1831 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
778 } 1832 }
779#endif
780 1833
781 ev_rt_now = ev_time (); 1834 assert (timermax >= timercnt);
782 mn_now = get_clock (); 1835 verify_heap (EV_A_ timers, timercnt);
783 now_floor = mn_now;
784 rtmn_diff = ev_rt_now - mn_now;
785 1836
786 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 1837#if EV_PERIODIC_ENABLE
787 flags = atoi (getenv ("LIBEV_FLAGS")); 1838 assert (periodicmax >= periodiccnt);
788 1839 verify_heap (EV_A_ periodics, periodiccnt);
789 if (!(flags & 0x0000ffff))
790 flags |= 0x0000ffff;
791
792 method = 0;
793#if EV_USE_PORT
794 if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);
795#endif
796#if EV_USE_KQUEUE
797 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
798#endif
799#if EV_USE_EPOLL
800 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
801#endif
802#if EV_USE_POLL
803 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
804#endif
805#if EV_USE_SELECT
806 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
807#endif
808
809 ev_init (&sigev, sigcb);
810 ev_set_priority (&sigev, EV_MAXPRI);
811 }
812}
813
814void
815loop_destroy (EV_P)
816{
817 int i;
818
819#if EV_USE_PORT
820 if (method == EVMETHOD_PORT ) port_destroy (EV_A);
821#endif
822#if EV_USE_KQUEUE
823 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
824#endif
825#if EV_USE_EPOLL
826 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
827#endif
828#if EV_USE_POLL
829 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
830#endif
831#if EV_USE_SELECT
832 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
833#endif 1840#endif
834 1841
835 for (i = NUMPRI; i--; ) 1842 for (i = NUMPRI; i--; )
836 array_free (pending, [i]); 1843 {
1844 assert (pendingmax [i] >= pendingcnt [i]);
1845#if EV_IDLE_ENABLE
1846 assert (idleall >= 0);
1847 assert (idlemax [i] >= idlecnt [i]);
1848 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1849#endif
1850 }
837 1851
838 /* have to use the microsoft-never-gets-it-right macro */ 1852#if EV_FORK_ENABLE
839 array_free (fdchange, EMPTY0); 1853 assert (forkmax >= forkcnt);
840 array_free (timer, EMPTY0); 1854 array_verify (EV_A_ (W *)forks, forkcnt);
841#if EV_PERIODICS 1855#endif
842 array_free (periodic, EMPTY0); 1856
1857#if EV_ASYNC_ENABLE
1858 assert (asyncmax >= asynccnt);
1859 array_verify (EV_A_ (W *)asyncs, asynccnt);
1860#endif
1861
1862 assert (preparemax >= preparecnt);
1863 array_verify (EV_A_ (W *)prepares, preparecnt);
1864
1865 assert (checkmax >= checkcnt);
1866 array_verify (EV_A_ (W *)checks, checkcnt);
1867
1868# if 0
1869 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1870 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
843#endif 1871# endif
844 array_free (idle, EMPTY0);
845 array_free (prepare, EMPTY0);
846 array_free (check, EMPTY0);
847
848 method = 0;
849}
850
851static void
852loop_fork (EV_P)
853{
854#if EV_USE_PORT
855 if (method == EVMETHOD_PORT ) port_fork (EV_A);
856#endif 1872#endif
857#if EV_USE_KQUEUE
858 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
859#endif
860#if EV_USE_EPOLL
861 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
862#endif
863
864 if (ev_is_active (&sigev))
865 {
866 /* default loop */
867
868 ev_ref (EV_A);
869 ev_io_stop (EV_A_ &sigev);
870 close (sigpipe [0]);
871 close (sigpipe [1]);
872
873 while (pipe (sigpipe))
874 syserr ("(libev) error creating pipe");
875
876 siginit (EV_A);
877 }
878
879 postfork = 0;
880} 1873}
1874#endif
881 1875
882#if EV_MULTIPLICITY 1876#if EV_MULTIPLICITY
883struct ev_loop * 1877struct ev_loop *
884ev_loop_new (unsigned int flags)
885{
886 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
887
888 memset (loop, 0, sizeof (struct ev_loop));
889
890 loop_init (EV_A_ flags);
891
892 if (ev_method (EV_A))
893 return loop;
894
895 return 0;
896}
897
898void
899ev_loop_destroy (EV_P)
900{
901 loop_destroy (EV_A);
902 ev_free (loop);
903}
904
905void
906ev_loop_fork (EV_P)
907{
908 postfork = 1;
909}
910
911#endif
912
913#if EV_MULTIPLICITY
914struct ev_loop *
915ev_default_loop_ (unsigned int flags) 1878ev_default_loop_init (unsigned int flags)
916#else 1879#else
917int 1880int
918ev_default_loop (unsigned int flags) 1881ev_default_loop (unsigned int flags)
919#endif 1882#endif
920{ 1883{
921 if (sigpipe [0] == sigpipe [1])
922 if (pipe (sigpipe))
923 return 0;
924
925 if (!ev_default_loop_ptr) 1884 if (!ev_default_loop_ptr)
926 { 1885 {
927#if EV_MULTIPLICITY 1886#if EV_MULTIPLICITY
928 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1887 EV_P = ev_default_loop_ptr = &default_loop_struct;
929#else 1888#else
930 ev_default_loop_ptr = 1; 1889 ev_default_loop_ptr = 1;
931#endif 1890#endif
932 1891
933 loop_init (EV_A_ flags); 1892 loop_init (EV_A_ flags);
934 1893
935 if (ev_method (EV_A)) 1894 if (ev_backend (EV_A))
936 { 1895 {
937 siginit (EV_A);
938
939#ifndef _WIN32 1896#ifndef _WIN32
940 ev_signal_init (&childev, childcb, SIGCHLD); 1897 ev_signal_init (&childev, childcb, SIGCHLD);
941 ev_set_priority (&childev, EV_MAXPRI); 1898 ev_set_priority (&childev, EV_MAXPRI);
942 ev_signal_start (EV_A_ &childev); 1899 ev_signal_start (EV_A_ &childev);
943 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1900 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
952 1909
953void 1910void
954ev_default_destroy (void) 1911ev_default_destroy (void)
955{ 1912{
956#if EV_MULTIPLICITY 1913#if EV_MULTIPLICITY
957 struct ev_loop *loop = ev_default_loop_ptr; 1914 EV_P = ev_default_loop_ptr;
958#endif 1915#endif
1916
1917 ev_default_loop_ptr = 0;
959 1918
960#ifndef _WIN32 1919#ifndef _WIN32
961 ev_ref (EV_A); /* child watcher */ 1920 ev_ref (EV_A); /* child watcher */
962 ev_signal_stop (EV_A_ &childev); 1921 ev_signal_stop (EV_A_ &childev);
963#endif 1922#endif
964 1923
965 ev_ref (EV_A); /* signal watcher */
966 ev_io_stop (EV_A_ &sigev);
967
968 close (sigpipe [0]); sigpipe [0] = 0;
969 close (sigpipe [1]); sigpipe [1] = 0;
970
971 loop_destroy (EV_A); 1924 loop_destroy (EV_A);
972} 1925}
973 1926
974void 1927void
975ev_default_fork (void) 1928ev_default_fork (void)
976{ 1929{
977#if EV_MULTIPLICITY 1930#if EV_MULTIPLICITY
978 struct ev_loop *loop = ev_default_loop_ptr; 1931 EV_P = ev_default_loop_ptr;
979#endif 1932#endif
980 1933
981 if (method) 1934 postfork = 1; /* must be in line with ev_loop_fork */
982 postfork = 1;
983} 1935}
984 1936
985/*****************************************************************************/ 1937/*****************************************************************************/
986 1938
987static int 1939void
988any_pending (EV_P) 1940ev_invoke (EV_P_ void *w, int revents)
1941{
1942 EV_CB_INVOKE ((W)w, revents);
1943}
1944
1945unsigned int
1946ev_pending_count (EV_P)
989{ 1947{
990 int pri; 1948 int pri;
1949 unsigned int count = 0;
991 1950
992 for (pri = NUMPRI; pri--; ) 1951 for (pri = NUMPRI; pri--; )
993 if (pendingcnt [pri]) 1952 count += pendingcnt [pri];
994 return 1;
995 1953
996 return 0; 1954 return count;
997} 1955}
998 1956
999inline void 1957void noinline
1000call_pending (EV_P) 1958ev_invoke_pending (EV_P)
1001{ 1959{
1002 int pri; 1960 int pri;
1003 1961
1004 for (pri = NUMPRI; pri--; ) 1962 for (pri = NUMPRI; pri--; )
1005 while (pendingcnt [pri]) 1963 while (pendingcnt [pri])
1006 { 1964 {
1007 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1965 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1008 1966
1009 if (expect_true (p->w)) 1967 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1010 { 1968 /* ^ this is no longer true, as pending_w could be here */
1969
1011 p->w->pending = 0; 1970 p->w->pending = 0;
1012 EV_CB_INVOKE (p->w, p->events); 1971 EV_CB_INVOKE (p->w, p->events);
1013 } 1972 EV_FREQUENT_CHECK;
1014 } 1973 }
1015} 1974}
1016 1975
1976#if EV_IDLE_ENABLE
1977/* make idle watchers pending. this handles the "call-idle */
1978/* only when higher priorities are idle" logic */
1017inline void 1979inline_size void
1980idle_reify (EV_P)
1981{
1982 if (expect_false (idleall))
1983 {
1984 int pri;
1985
1986 for (pri = NUMPRI; pri--; )
1987 {
1988 if (pendingcnt [pri])
1989 break;
1990
1991 if (idlecnt [pri])
1992 {
1993 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1994 break;
1995 }
1996 }
1997 }
1998}
1999#endif
2000
2001/* make timers pending */
2002inline_size void
1018timers_reify (EV_P) 2003timers_reify (EV_P)
1019{ 2004{
2005 EV_FREQUENT_CHECK;
2006
1020 while (timercnt && ((WT)timers [0])->at <= mn_now) 2007 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1021 { 2008 {
1022 struct ev_timer *w = timers [0]; 2009 do
1023
1024 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1025
1026 /* first reschedule or stop timer */
1027 if (w->repeat)
1028 { 2010 {
2011 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2012
2013 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2014
2015 /* first reschedule or stop timer */
2016 if (w->repeat)
2017 {
2018 ev_at (w) += w->repeat;
2019 if (ev_at (w) < mn_now)
2020 ev_at (w) = mn_now;
2021
1029 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2022 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1030 2023
1031 ((WT)w)->at += w->repeat; 2024 ANHE_at_cache (timers [HEAP0]);
1032 if (((WT)w)->at < mn_now)
1033 ((WT)w)->at = mn_now;
1034
1035 downheap ((WT *)timers, timercnt, 0); 2025 downheap (timers, timercnt, HEAP0);
2026 }
2027 else
2028 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2029
2030 EV_FREQUENT_CHECK;
2031 feed_reverse (EV_A_ (W)w);
1036 } 2032 }
1037 else 2033 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1038 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1039 2034
1040 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2035 feed_reverse_done (EV_A_ EV_TIMEOUT);
1041 } 2036 }
1042} 2037}
1043 2038
1044#if EV_PERIODICS 2039#if EV_PERIODIC_ENABLE
2040/* make periodics pending */
1045inline void 2041inline_size void
1046periodics_reify (EV_P) 2042periodics_reify (EV_P)
1047{ 2043{
2044 EV_FREQUENT_CHECK;
2045
1048 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2046 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1049 { 2047 {
1050 struct ev_periodic *w = periodics [0]; 2048 int feed_count = 0;
1051 2049
2050 do
2051 {
2052 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2053
1052 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2054 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1053 2055
1054 /* first reschedule or stop timer */ 2056 /* first reschedule or stop timer */
2057 if (w->reschedule_cb)
2058 {
2059 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2060
2061 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2062
2063 ANHE_at_cache (periodics [HEAP0]);
2064 downheap (periodics, periodiccnt, HEAP0);
2065 }
2066 else if (w->interval)
2067 {
2068 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2069 /* if next trigger time is not sufficiently in the future, put it there */
2070 /* this might happen because of floating point inexactness */
2071 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2072 {
2073 ev_at (w) += w->interval;
2074
2075 /* if interval is unreasonably low we might still have a time in the past */
2076 /* so correct this. this will make the periodic very inexact, but the user */
2077 /* has effectively asked to get triggered more often than possible */
2078 if (ev_at (w) < ev_rt_now)
2079 ev_at (w) = ev_rt_now;
2080 }
2081
2082 ANHE_at_cache (periodics [HEAP0]);
2083 downheap (periodics, periodiccnt, HEAP0);
2084 }
2085 else
2086 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2087
2088 EV_FREQUENT_CHECK;
2089 feed_reverse (EV_A_ (W)w);
2090 }
2091 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2092
2093 feed_reverse_done (EV_A_ EV_PERIODIC);
2094 }
2095}
2096
2097/* simply recalculate all periodics */
2098/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2099static void noinline
2100periodics_reschedule (EV_P)
2101{
2102 int i;
2103
2104 /* adjust periodics after time jump */
2105 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2106 {
2107 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2108
1055 if (w->reschedule_cb) 2109 if (w->reschedule_cb)
2110 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2111 else if (w->interval)
2112 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2113
2114 ANHE_at_cache (periodics [i]);
2115 }
2116
2117 reheap (periodics, periodiccnt);
2118}
2119#endif
2120
2121/* adjust all timers by a given offset */
2122static void noinline
2123timers_reschedule (EV_P_ ev_tstamp adjust)
2124{
2125 int i;
2126
2127 for (i = 0; i < timercnt; ++i)
2128 {
2129 ANHE *he = timers + i + HEAP0;
2130 ANHE_w (*he)->at += adjust;
2131 ANHE_at_cache (*he);
2132 }
2133}
2134
2135/* fetch new monotonic and realtime times from the kernel */
2136/* also detetc if there was a timejump, and act accordingly */
2137inline_speed void
2138time_update (EV_P_ ev_tstamp max_block)
2139{
2140#if EV_USE_MONOTONIC
2141 if (expect_true (have_monotonic))
2142 {
2143 int i;
2144 ev_tstamp odiff = rtmn_diff;
2145
2146 mn_now = get_clock ();
2147
2148 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2149 /* interpolate in the meantime */
2150 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1056 { 2151 {
1057 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2152 ev_rt_now = rtmn_diff + mn_now;
1058 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2153 return;
1059 downheap ((WT *)periodics, periodiccnt, 0);
1060 } 2154 }
1061 else if (w->interval)
1062 {
1063 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1064 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1065 downheap ((WT *)periodics, periodiccnt, 0);
1066 }
1067 else
1068 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1069 2155
1070 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1071 }
1072}
1073
1074static void
1075periodics_reschedule (EV_P)
1076{
1077 int i;
1078
1079 /* adjust periodics after time jump */
1080 for (i = 0; i < periodiccnt; ++i)
1081 {
1082 struct ev_periodic *w = periodics [i];
1083
1084 if (w->reschedule_cb)
1085 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1086 else if (w->interval)
1087 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1088 }
1089
1090 /* now rebuild the heap */
1091 for (i = periodiccnt >> 1; i--; )
1092 downheap ((WT *)periodics, periodiccnt, i);
1093}
1094#endif
1095
1096inline int
1097time_update_monotonic (EV_P)
1098{
1099 mn_now = get_clock ();
1100
1101 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1102 {
1103 ev_rt_now = rtmn_diff + mn_now;
1104 return 0;
1105 }
1106 else
1107 {
1108 now_floor = mn_now; 2156 now_floor = mn_now;
1109 ev_rt_now = ev_time (); 2157 ev_rt_now = ev_time ();
1110 return 1;
1111 }
1112}
1113 2158
1114inline void 2159 /* loop a few times, before making important decisions.
1115time_update (EV_P) 2160 * on the choice of "4": one iteration isn't enough,
1116{ 2161 * in case we get preempted during the calls to
1117 int i; 2162 * ev_time and get_clock. a second call is almost guaranteed
1118 2163 * to succeed in that case, though. and looping a few more times
1119#if EV_USE_MONOTONIC 2164 * doesn't hurt either as we only do this on time-jumps or
1120 if (expect_true (have_monotonic)) 2165 * in the unlikely event of having been preempted here.
1121 { 2166 */
1122 if (time_update_monotonic (EV_A)) 2167 for (i = 4; --i; )
1123 { 2168 {
1124 ev_tstamp odiff = rtmn_diff;
1125
1126 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1127 {
1128 rtmn_diff = ev_rt_now - mn_now; 2169 rtmn_diff = ev_rt_now - mn_now;
1129 2170
1130 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2171 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1131 return; /* all is well */ 2172 return; /* all is well */
1132 2173
1133 ev_rt_now = ev_time (); 2174 ev_rt_now = ev_time ();
1134 mn_now = get_clock (); 2175 mn_now = get_clock ();
1135 now_floor = mn_now; 2176 now_floor = mn_now;
1136 } 2177 }
1137 2178
2179 /* no timer adjustment, as the monotonic clock doesn't jump */
2180 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1138# if EV_PERIODICS 2181# if EV_PERIODIC_ENABLE
2182 periodics_reschedule (EV_A);
2183# endif
2184 }
2185 else
2186#endif
2187 {
2188 ev_rt_now = ev_time ();
2189
2190 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2191 {
2192 /* adjust timers. this is easy, as the offset is the same for all of them */
2193 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2194#if EV_PERIODIC_ENABLE
1139 periodics_reschedule (EV_A); 2195 periodics_reschedule (EV_A);
1140# endif 2196#endif
1141 /* no timer adjustment, as the monotonic clock doesn't jump */
1142 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1143 } 2197 }
1144 }
1145 else
1146#endif
1147 {
1148 ev_rt_now = ev_time ();
1149
1150 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1151 {
1152#if EV_PERIODICS
1153 periodics_reschedule (EV_A);
1154#endif
1155
1156 /* adjust timers. this is easy, as the offset is the same for all */
1157 for (i = 0; i < timercnt; ++i)
1158 ((WT)timers [i])->at += ev_rt_now - mn_now;
1159 }
1160 2198
1161 mn_now = ev_rt_now; 2199 mn_now = ev_rt_now;
1162 } 2200 }
1163} 2201}
1164 2202
1165void 2203void
1166ev_ref (EV_P)
1167{
1168 ++activecnt;
1169}
1170
1171void
1172ev_unref (EV_P)
1173{
1174 --activecnt;
1175}
1176
1177static int loop_done;
1178
1179void
1180ev_loop (EV_P_ int flags) 2204ev_loop (EV_P_ int flags)
1181{ 2205{
1182 double block; 2206#if EV_MINIMAL < 2
1183 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2207 ++loop_depth;
2208#endif
1184 2209
1185 while (activecnt) 2210 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2211
2212 loop_done = EVUNLOOP_CANCEL;
2213
2214 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2215
2216 do
1186 { 2217 {
2218#if EV_VERIFY >= 2
2219 ev_loop_verify (EV_A);
2220#endif
2221
2222#ifndef _WIN32
2223 if (expect_false (curpid)) /* penalise the forking check even more */
2224 if (expect_false (getpid () != curpid))
2225 {
2226 curpid = getpid ();
2227 postfork = 1;
2228 }
2229#endif
2230
2231#if EV_FORK_ENABLE
2232 /* we might have forked, so queue fork handlers */
2233 if (expect_false (postfork))
2234 if (forkcnt)
2235 {
2236 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2237 EV_INVOKE_PENDING;
2238 }
2239#endif
2240
1187 /* queue check watchers (and execute them) */ 2241 /* queue prepare watchers (and execute them) */
1188 if (expect_false (preparecnt)) 2242 if (expect_false (preparecnt))
1189 { 2243 {
1190 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2244 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1191 call_pending (EV_A); 2245 EV_INVOKE_PENDING;
1192 } 2246 }
2247
2248 if (expect_false (loop_done))
2249 break;
1193 2250
1194 /* we might have forked, so reify kernel state if necessary */ 2251 /* we might have forked, so reify kernel state if necessary */
1195 if (expect_false (postfork)) 2252 if (expect_false (postfork))
1196 loop_fork (EV_A); 2253 loop_fork (EV_A);
1197 2254
1198 /* update fd-related kernel structures */ 2255 /* update fd-related kernel structures */
1199 fd_reify (EV_A); 2256 fd_reify (EV_A);
1200 2257
1201 /* calculate blocking time */ 2258 /* calculate blocking time */
2259 {
2260 ev_tstamp waittime = 0.;
2261 ev_tstamp sleeptime = 0.;
1202 2262
1203 /* we only need this for !monotonic clock or timers, but as we basically 2263 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1204 always have timers, we just calculate it always */
1205#if EV_USE_MONOTONIC
1206 if (expect_true (have_monotonic))
1207 time_update_monotonic (EV_A);
1208 else
1209#endif
1210 { 2264 {
1211 ev_rt_now = ev_time (); 2265 /* remember old timestamp for io_blocktime calculation */
1212 mn_now = ev_rt_now; 2266 ev_tstamp prev_mn_now = mn_now;
1213 }
1214 2267
1215 if (flags & EVLOOP_NONBLOCK || idlecnt) 2268 /* update time to cancel out callback processing overhead */
1216 block = 0.; 2269 time_update (EV_A_ 1e100);
1217 else 2270
1218 {
1219 block = MAX_BLOCKTIME; 2271 waittime = MAX_BLOCKTIME;
1220 2272
1221 if (timercnt) 2273 if (timercnt)
1222 { 2274 {
1223 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2275 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1224 if (block > to) block = to; 2276 if (waittime > to) waittime = to;
1225 } 2277 }
1226 2278
1227#if EV_PERIODICS 2279#if EV_PERIODIC_ENABLE
1228 if (periodiccnt) 2280 if (periodiccnt)
1229 { 2281 {
1230 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2282 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1231 if (block > to) block = to; 2283 if (waittime > to) waittime = to;
1232 } 2284 }
1233#endif 2285#endif
1234 2286
1235 if (expect_false (block < 0.)) block = 0.; 2287 /* don't let timeouts decrease the waittime below timeout_blocktime */
2288 if (expect_false (waittime < timeout_blocktime))
2289 waittime = timeout_blocktime;
2290
2291 /* extra check because io_blocktime is commonly 0 */
2292 if (expect_false (io_blocktime))
2293 {
2294 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2295
2296 if (sleeptime > waittime - backend_fudge)
2297 sleeptime = waittime - backend_fudge;
2298
2299 if (expect_true (sleeptime > 0.))
2300 {
2301 ev_sleep (sleeptime);
2302 waittime -= sleeptime;
2303 }
2304 }
1236 } 2305 }
1237 2306
1238 method_poll (EV_A_ block); 2307#if EV_MINIMAL < 2
2308 ++loop_count;
2309#endif
2310 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2311 backend_poll (EV_A_ waittime);
2312 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1239 2313
1240 /* update ev_rt_now, do magic */ 2314 /* update ev_rt_now, do magic */
1241 time_update (EV_A); 2315 time_update (EV_A_ waittime + sleeptime);
2316 }
1242 2317
1243 /* queue pending timers and reschedule them */ 2318 /* queue pending timers and reschedule them */
1244 timers_reify (EV_A); /* relative timers called last */ 2319 timers_reify (EV_A); /* relative timers called last */
1245#if EV_PERIODICS 2320#if EV_PERIODIC_ENABLE
1246 periodics_reify (EV_A); /* absolute timers called first */ 2321 periodics_reify (EV_A); /* absolute timers called first */
1247#endif 2322#endif
1248 2323
2324#if EV_IDLE_ENABLE
1249 /* queue idle watchers unless io or timers are pending */ 2325 /* queue idle watchers unless other events are pending */
1250 if (idlecnt && !any_pending (EV_A)) 2326 idle_reify (EV_A);
1251 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2327#endif
1252 2328
1253 /* queue check watchers, to be executed first */ 2329 /* queue check watchers, to be executed first */
1254 if (expect_false (checkcnt)) 2330 if (expect_false (checkcnt))
1255 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2331 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1256 2332
1257 call_pending (EV_A); 2333 EV_INVOKE_PENDING;
1258
1259 if (expect_false (loop_done))
1260 break;
1261 } 2334 }
2335 while (expect_true (
2336 activecnt
2337 && !loop_done
2338 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2339 ));
1262 2340
1263 if (loop_done != 2) 2341 if (loop_done == EVUNLOOP_ONE)
1264 loop_done = 0; 2342 loop_done = EVUNLOOP_CANCEL;
2343
2344#if EV_MINIMAL < 2
2345 --loop_depth;
2346#endif
1265} 2347}
1266 2348
1267void 2349void
1268ev_unloop (EV_P_ int how) 2350ev_unloop (EV_P_ int how)
1269{ 2351{
1270 loop_done = how; 2352 loop_done = how;
1271} 2353}
1272 2354
2355void
2356ev_ref (EV_P)
2357{
2358 ++activecnt;
2359}
2360
2361void
2362ev_unref (EV_P)
2363{
2364 --activecnt;
2365}
2366
2367void
2368ev_now_update (EV_P)
2369{
2370 time_update (EV_A_ 1e100);
2371}
2372
2373void
2374ev_suspend (EV_P)
2375{
2376 ev_now_update (EV_A);
2377}
2378
2379void
2380ev_resume (EV_P)
2381{
2382 ev_tstamp mn_prev = mn_now;
2383
2384 ev_now_update (EV_A);
2385 timers_reschedule (EV_A_ mn_now - mn_prev);
2386#if EV_PERIODIC_ENABLE
2387 /* TODO: really do this? */
2388 periodics_reschedule (EV_A);
2389#endif
2390}
2391
1273/*****************************************************************************/ 2392/*****************************************************************************/
2393/* singly-linked list management, used when the expected list length is short */
1274 2394
1275inline void 2395inline_size void
1276wlist_add (WL *head, WL elem) 2396wlist_add (WL *head, WL elem)
1277{ 2397{
1278 elem->next = *head; 2398 elem->next = *head;
1279 *head = elem; 2399 *head = elem;
1280} 2400}
1281 2401
1282inline void 2402inline_size void
1283wlist_del (WL *head, WL elem) 2403wlist_del (WL *head, WL elem)
1284{ 2404{
1285 while (*head) 2405 while (*head)
1286 { 2406 {
1287 if (*head == elem) 2407 if (expect_true (*head == elem))
1288 { 2408 {
1289 *head = elem->next; 2409 *head = elem->next;
1290 return; 2410 break;
1291 } 2411 }
1292 2412
1293 head = &(*head)->next; 2413 head = &(*head)->next;
1294 } 2414 }
1295} 2415}
1296 2416
2417/* internal, faster, version of ev_clear_pending */
1297inline void 2418inline_speed void
1298ev_clear_pending (EV_P_ W w) 2419clear_pending (EV_P_ W w)
1299{ 2420{
1300 if (w->pending) 2421 if (w->pending)
1301 { 2422 {
1302 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2423 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1303 w->pending = 0; 2424 w->pending = 0;
1304 } 2425 }
1305} 2426}
1306 2427
2428int
2429ev_clear_pending (EV_P_ void *w)
2430{
2431 W w_ = (W)w;
2432 int pending = w_->pending;
2433
2434 if (expect_true (pending))
2435 {
2436 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2437 p->w = (W)&pending_w;
2438 w_->pending = 0;
2439 return p->events;
2440 }
2441 else
2442 return 0;
2443}
2444
1307inline void 2445inline_size void
2446pri_adjust (EV_P_ W w)
2447{
2448 int pri = ev_priority (w);
2449 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2450 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2451 ev_set_priority (w, pri);
2452}
2453
2454inline_speed void
1308ev_start (EV_P_ W w, int active) 2455ev_start (EV_P_ W w, int active)
1309{ 2456{
1310 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2457 pri_adjust (EV_A_ w);
1311 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1312
1313 w->active = active; 2458 w->active = active;
1314 ev_ref (EV_A); 2459 ev_ref (EV_A);
1315} 2460}
1316 2461
1317inline void 2462inline_size void
1318ev_stop (EV_P_ W w) 2463ev_stop (EV_P_ W w)
1319{ 2464{
1320 ev_unref (EV_A); 2465 ev_unref (EV_A);
1321 w->active = 0; 2466 w->active = 0;
1322} 2467}
1323 2468
1324/*****************************************************************************/ 2469/*****************************************************************************/
1325 2470
1326void 2471void noinline
1327ev_io_start (EV_P_ struct ev_io *w) 2472ev_io_start (EV_P_ ev_io *w)
1328{ 2473{
1329 int fd = w->fd; 2474 int fd = w->fd;
1330 2475
1331 if (expect_false (ev_is_active (w))) 2476 if (expect_false (ev_is_active (w)))
1332 return; 2477 return;
1333 2478
1334 assert (("ev_io_start called with negative fd", fd >= 0)); 2479 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2480 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2481
2482 EV_FREQUENT_CHECK;
1335 2483
1336 ev_start (EV_A_ (W)w, 1); 2484 ev_start (EV_A_ (W)w, 1);
1337 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2485 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1338 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2486 wlist_add (&anfds[fd].head, (WL)w);
1339 2487
1340 fd_change (EV_A_ fd); 2488 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1341} 2489 w->events &= ~EV__IOFDSET;
1342 2490
1343void 2491 EV_FREQUENT_CHECK;
2492}
2493
2494void noinline
1344ev_io_stop (EV_P_ struct ev_io *w) 2495ev_io_stop (EV_P_ ev_io *w)
1345{ 2496{
1346 ev_clear_pending (EV_A_ (W)w); 2497 clear_pending (EV_A_ (W)w);
1347 if (expect_false (!ev_is_active (w))) 2498 if (expect_false (!ev_is_active (w)))
1348 return; 2499 return;
1349 2500
1350 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2501 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1351 2502
2503 EV_FREQUENT_CHECK;
2504
1352 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2505 wlist_del (&anfds[w->fd].head, (WL)w);
1353 ev_stop (EV_A_ (W)w); 2506 ev_stop (EV_A_ (W)w);
1354 2507
1355 fd_change (EV_A_ w->fd); 2508 fd_change (EV_A_ w->fd, 1);
1356}
1357 2509
1358void 2510 EV_FREQUENT_CHECK;
2511}
2512
2513void noinline
1359ev_timer_start (EV_P_ struct ev_timer *w) 2514ev_timer_start (EV_P_ ev_timer *w)
1360{ 2515{
1361 if (expect_false (ev_is_active (w))) 2516 if (expect_false (ev_is_active (w)))
1362 return; 2517 return;
1363 2518
1364 ((WT)w)->at += mn_now; 2519 ev_at (w) += mn_now;
1365 2520
1366 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2521 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1367 2522
2523 EV_FREQUENT_CHECK;
2524
2525 ++timercnt;
1368 ev_start (EV_A_ (W)w, ++timercnt); 2526 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1369 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 2527 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1370 timers [timercnt - 1] = w; 2528 ANHE_w (timers [ev_active (w)]) = (WT)w;
1371 upheap ((WT *)timers, timercnt - 1); 2529 ANHE_at_cache (timers [ev_active (w)]);
2530 upheap (timers, ev_active (w));
1372 2531
2532 EV_FREQUENT_CHECK;
2533
1373 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2534 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1374} 2535}
1375 2536
1376void 2537void noinline
1377ev_timer_stop (EV_P_ struct ev_timer *w) 2538ev_timer_stop (EV_P_ ev_timer *w)
1378{ 2539{
1379 ev_clear_pending (EV_A_ (W)w); 2540 clear_pending (EV_A_ (W)w);
1380 if (expect_false (!ev_is_active (w))) 2541 if (expect_false (!ev_is_active (w)))
1381 return; 2542 return;
1382 2543
2544 EV_FREQUENT_CHECK;
2545
2546 {
2547 int active = ev_active (w);
2548
1383 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2549 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1384 2550
2551 --timercnt;
2552
1385 if (expect_true (((W)w)->active < timercnt--)) 2553 if (expect_true (active < timercnt + HEAP0))
1386 { 2554 {
1387 timers [((W)w)->active - 1] = timers [timercnt]; 2555 timers [active] = timers [timercnt + HEAP0];
1388 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2556 adjustheap (timers, timercnt, active);
1389 } 2557 }
2558 }
1390 2559
1391 ((WT)w)->at -= mn_now; 2560 EV_FREQUENT_CHECK;
2561
2562 ev_at (w) -= mn_now;
1392 2563
1393 ev_stop (EV_A_ (W)w); 2564 ev_stop (EV_A_ (W)w);
1394} 2565}
1395 2566
1396void 2567void noinline
1397ev_timer_again (EV_P_ struct ev_timer *w) 2568ev_timer_again (EV_P_ ev_timer *w)
1398{ 2569{
2570 EV_FREQUENT_CHECK;
2571
1399 if (ev_is_active (w)) 2572 if (ev_is_active (w))
1400 { 2573 {
1401 if (w->repeat) 2574 if (w->repeat)
1402 { 2575 {
1403 ((WT)w)->at = mn_now + w->repeat; 2576 ev_at (w) = mn_now + w->repeat;
2577 ANHE_at_cache (timers [ev_active (w)]);
1404 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2578 adjustheap (timers, timercnt, ev_active (w));
1405 } 2579 }
1406 else 2580 else
1407 ev_timer_stop (EV_A_ w); 2581 ev_timer_stop (EV_A_ w);
1408 } 2582 }
1409 else if (w->repeat) 2583 else if (w->repeat)
1410 { 2584 {
1411 w->at = w->repeat; 2585 ev_at (w) = w->repeat;
1412 ev_timer_start (EV_A_ w); 2586 ev_timer_start (EV_A_ w);
1413 } 2587 }
1414}
1415 2588
2589 EV_FREQUENT_CHECK;
2590}
2591
2592ev_tstamp
2593ev_timer_remaining (EV_P_ ev_timer *w)
2594{
2595 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2596}
2597
1416#if EV_PERIODICS 2598#if EV_PERIODIC_ENABLE
1417void 2599void noinline
1418ev_periodic_start (EV_P_ struct ev_periodic *w) 2600ev_periodic_start (EV_P_ ev_periodic *w)
1419{ 2601{
1420 if (expect_false (ev_is_active (w))) 2602 if (expect_false (ev_is_active (w)))
1421 return; 2603 return;
1422 2604
1423 if (w->reschedule_cb) 2605 if (w->reschedule_cb)
1424 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2606 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1425 else if (w->interval) 2607 else if (w->interval)
1426 { 2608 {
1427 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2609 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1428 /* this formula differs from the one in periodic_reify because we do not always round up */ 2610 /* this formula differs from the one in periodic_reify because we do not always round up */
1429 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2611 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1430 } 2612 }
2613 else
2614 ev_at (w) = w->offset;
1431 2615
2616 EV_FREQUENT_CHECK;
2617
2618 ++periodiccnt;
1432 ev_start (EV_A_ (W)w, ++periodiccnt); 2619 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1433 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2620 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1434 periodics [periodiccnt - 1] = w; 2621 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1435 upheap ((WT *)periodics, periodiccnt - 1); 2622 ANHE_at_cache (periodics [ev_active (w)]);
2623 upheap (periodics, ev_active (w));
1436 2624
2625 EV_FREQUENT_CHECK;
2626
1437 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2627 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1438} 2628}
1439 2629
1440void 2630void noinline
1441ev_periodic_stop (EV_P_ struct ev_periodic *w) 2631ev_periodic_stop (EV_P_ ev_periodic *w)
1442{ 2632{
1443 ev_clear_pending (EV_A_ (W)w); 2633 clear_pending (EV_A_ (W)w);
1444 if (expect_false (!ev_is_active (w))) 2634 if (expect_false (!ev_is_active (w)))
1445 return; 2635 return;
1446 2636
2637 EV_FREQUENT_CHECK;
2638
2639 {
2640 int active = ev_active (w);
2641
1447 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2642 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1448 2643
2644 --periodiccnt;
2645
1449 if (expect_true (((W)w)->active < periodiccnt--)) 2646 if (expect_true (active < periodiccnt + HEAP0))
1450 { 2647 {
1451 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2648 periodics [active] = periodics [periodiccnt + HEAP0];
1452 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2649 adjustheap (periodics, periodiccnt, active);
1453 } 2650 }
2651 }
2652
2653 EV_FREQUENT_CHECK;
1454 2654
1455 ev_stop (EV_A_ (W)w); 2655 ev_stop (EV_A_ (W)w);
1456} 2656}
1457 2657
1458void 2658void noinline
1459ev_periodic_again (EV_P_ struct ev_periodic *w) 2659ev_periodic_again (EV_P_ ev_periodic *w)
1460{ 2660{
1461 /* TODO: use adjustheap and recalculation */ 2661 /* TODO: use adjustheap and recalculation */
1462 ev_periodic_stop (EV_A_ w); 2662 ev_periodic_stop (EV_A_ w);
1463 ev_periodic_start (EV_A_ w); 2663 ev_periodic_start (EV_A_ w);
1464} 2664}
1465#endif 2665#endif
1466 2666
1467void 2667#ifndef SA_RESTART
1468ev_idle_start (EV_P_ struct ev_idle *w) 2668# define SA_RESTART 0
2669#endif
2670
2671void noinline
2672ev_signal_start (EV_P_ ev_signal *w)
1469{ 2673{
1470 if (expect_false (ev_is_active (w))) 2674 if (expect_false (ev_is_active (w)))
1471 return; 2675 return;
1472 2676
2677 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2678
2679#if EV_MULTIPLICITY
2680 assert (("libev: a signal must not be attached to two different loops",
2681 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2682
2683 signals [w->signum - 1].loop = EV_A;
2684#endif
2685
2686 EV_FREQUENT_CHECK;
2687
2688#if EV_USE_SIGNALFD
2689 if (sigfd == -2)
2690 {
2691 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2692 if (sigfd < 0 && errno == EINVAL)
2693 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2694
2695 if (sigfd >= 0)
2696 {
2697 fd_intern (sigfd); /* doing it twice will not hurt */
2698
2699 sigemptyset (&sigfd_set);
2700
2701 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2702 ev_set_priority (&sigfd_w, EV_MAXPRI);
2703 ev_io_start (EV_A_ &sigfd_w);
2704 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2705 }
2706 }
2707
2708 if (sigfd >= 0)
2709 {
2710 /* TODO: check .head */
2711 sigaddset (&sigfd_set, w->signum);
2712 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2713
2714 signalfd (sigfd, &sigfd_set, 0);
2715 }
2716#endif
2717
1473 ev_start (EV_A_ (W)w, ++idlecnt); 2718 ev_start (EV_A_ (W)w, 1);
1474 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2); 2719 wlist_add (&signals [w->signum - 1].head, (WL)w);
1475 idles [idlecnt - 1] = w;
1476}
1477 2720
1478void 2721 if (!((WL)w)->next)
1479ev_idle_stop (EV_P_ struct ev_idle *w) 2722# if EV_USE_SIGNALFD
2723 if (sigfd < 0) /*TODO*/
2724# endif
2725 {
2726# if _WIN32
2727 signal (w->signum, ev_sighandler);
2728# else
2729 struct sigaction sa;
2730
2731 evpipe_init (EV_A);
2732
2733 sa.sa_handler = ev_sighandler;
2734 sigfillset (&sa.sa_mask);
2735 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2736 sigaction (w->signum, &sa, 0);
2737
2738 sigemptyset (&sa.sa_mask);
2739 sigaddset (&sa.sa_mask, w->signum);
2740 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2741#endif
2742 }
2743
2744 EV_FREQUENT_CHECK;
2745}
2746
2747void noinline
2748ev_signal_stop (EV_P_ ev_signal *w)
1480{ 2749{
1481 ev_clear_pending (EV_A_ (W)w); 2750 clear_pending (EV_A_ (W)w);
1482 if (expect_false (!ev_is_active (w))) 2751 if (expect_false (!ev_is_active (w)))
1483 return; 2752 return;
1484 2753
1485 idles [((W)w)->active - 1] = idles [--idlecnt]; 2754 EV_FREQUENT_CHECK;
2755
2756 wlist_del (&signals [w->signum - 1].head, (WL)w);
1486 ev_stop (EV_A_ (W)w); 2757 ev_stop (EV_A_ (W)w);
1487}
1488 2758
2759 if (!signals [w->signum - 1].head)
2760 {
2761#if EV_MULTIPLICITY
2762 signals [w->signum - 1].loop = 0; /* unattach from signal */
2763#endif
2764#if EV_USE_SIGNALFD
2765 if (sigfd >= 0)
2766 {
2767 sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2768 sigdelset (&sigfd_set, w->signum);
2769 signalfd (sigfd, &sigfd_set, 0);
2770 sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2771 /*TODO: maybe unblock signal? */
2772 }
2773 else
2774#endif
2775 signal (w->signum, SIG_DFL);
2776 }
2777
2778 EV_FREQUENT_CHECK;
2779}
2780
1489void 2781void
1490ev_prepare_start (EV_P_ struct ev_prepare *w) 2782ev_child_start (EV_P_ ev_child *w)
1491{ 2783{
2784#if EV_MULTIPLICITY
2785 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2786#endif
1492 if (expect_false (ev_is_active (w))) 2787 if (expect_false (ev_is_active (w)))
1493 return; 2788 return;
1494 2789
2790 EV_FREQUENT_CHECK;
2791
1495 ev_start (EV_A_ (W)w, ++preparecnt); 2792 ev_start (EV_A_ (W)w, 1);
1496 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 2793 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1497 prepares [preparecnt - 1] = w;
1498}
1499 2794
2795 EV_FREQUENT_CHECK;
2796}
2797
1500void 2798void
1501ev_prepare_stop (EV_P_ struct ev_prepare *w) 2799ev_child_stop (EV_P_ ev_child *w)
1502{ 2800{
1503 ev_clear_pending (EV_A_ (W)w); 2801 clear_pending (EV_A_ (W)w);
1504 if (expect_false (!ev_is_active (w))) 2802 if (expect_false (!ev_is_active (w)))
1505 return; 2803 return;
1506 2804
1507 prepares [((W)w)->active - 1] = prepares [--preparecnt]; 2805 EV_FREQUENT_CHECK;
2806
2807 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1508 ev_stop (EV_A_ (W)w); 2808 ev_stop (EV_A_ (W)w);
1509}
1510 2809
2810 EV_FREQUENT_CHECK;
2811}
2812
2813#if EV_STAT_ENABLE
2814
2815# ifdef _WIN32
2816# undef lstat
2817# define lstat(a,b) _stati64 (a,b)
2818# endif
2819
2820#define DEF_STAT_INTERVAL 5.0074891
2821#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2822#define MIN_STAT_INTERVAL 0.1074891
2823
2824static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2825
2826#if EV_USE_INOTIFY
2827# define EV_INOTIFY_BUFSIZE 8192
2828
2829static void noinline
2830infy_add (EV_P_ ev_stat *w)
2831{
2832 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);
2833
2834 if (w->wd < 0)
2835 {
2836 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2837 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2838
2839 /* monitor some parent directory for speedup hints */
2840 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2841 /* but an efficiency issue only */
2842 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2843 {
2844 char path [4096];
2845 strcpy (path, w->path);
2846
2847 do
2848 {
2849 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2850 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2851
2852 char *pend = strrchr (path, '/');
2853
2854 if (!pend || pend == path)
2855 break;
2856
2857 *pend = 0;
2858 w->wd = inotify_add_watch (fs_fd, path, mask);
2859 }
2860 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2861 }
2862 }
2863
2864 if (w->wd >= 0)
2865 {
2866 struct statfs sfs;
2867
2868 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2869
2870 /* now local changes will be tracked by inotify, but remote changes won't */
2871 /* unless the filesystem it known to be local, we therefore still poll */
2872 /* also do poll on <2.6.25, but with normal frequency */
2873
2874 if (fs_2625 && !statfs (w->path, &sfs))
2875 if (sfs.f_type == 0x1373 /* devfs */
2876 || sfs.f_type == 0xEF53 /* ext2/3 */
2877 || sfs.f_type == 0x3153464a /* jfs */
2878 || sfs.f_type == 0x52654973 /* reiser3 */
2879 || sfs.f_type == 0x01021994 /* tempfs */
2880 || sfs.f_type == 0x58465342 /* xfs */)
2881 return;
2882
2883 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2884 ev_timer_again (EV_A_ &w->timer);
2885 }
2886}
2887
2888static void noinline
2889infy_del (EV_P_ ev_stat *w)
2890{
2891 int slot;
2892 int wd = w->wd;
2893
2894 if (wd < 0)
2895 return;
2896
2897 w->wd = -2;
2898 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2899 wlist_del (&fs_hash [slot].head, (WL)w);
2900
2901 /* remove this watcher, if others are watching it, they will rearm */
2902 inotify_rm_watch (fs_fd, wd);
2903}
2904
2905static void noinline
2906infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2907{
2908 if (slot < 0)
2909 /* overflow, need to check for all hash slots */
2910 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2911 infy_wd (EV_A_ slot, wd, ev);
2912 else
2913 {
2914 WL w_;
2915
2916 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2917 {
2918 ev_stat *w = (ev_stat *)w_;
2919 w_ = w_->next; /* lets us remove this watcher and all before it */
2920
2921 if (w->wd == wd || wd == -1)
2922 {
2923 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2924 {
2925 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2926 w->wd = -1;
2927 infy_add (EV_A_ w); /* re-add, no matter what */
2928 }
2929
2930 stat_timer_cb (EV_A_ &w->timer, 0);
2931 }
2932 }
2933 }
2934}
2935
2936static void
2937infy_cb (EV_P_ ev_io *w, int revents)
2938{
2939 char buf [EV_INOTIFY_BUFSIZE];
2940 struct inotify_event *ev = (struct inotify_event *)buf;
2941 int ofs;
2942 int len = read (fs_fd, buf, sizeof (buf));
2943
2944 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2945 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2946}
2947
2948inline_size void
2949check_2625 (EV_P)
2950{
2951 /* kernels < 2.6.25 are borked
2952 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2953 */
2954 struct utsname buf;
2955 int major, minor, micro;
2956
2957 if (uname (&buf))
2958 return;
2959
2960 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2961 return;
2962
2963 if (major < 2
2964 || (major == 2 && minor < 6)
2965 || (major == 2 && minor == 6 && micro < 25))
2966 return;
2967
2968 fs_2625 = 1;
2969}
2970
2971inline_size void
2972infy_init (EV_P)
2973{
2974 if (fs_fd != -2)
2975 return;
2976
2977 fs_fd = -1;
2978
2979 check_2625 (EV_A);
2980
2981 fs_fd = inotify_init ();
2982
2983 if (fs_fd >= 0)
2984 {
2985 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2986 ev_set_priority (&fs_w, EV_MAXPRI);
2987 ev_io_start (EV_A_ &fs_w);
2988 }
2989}
2990
2991inline_size void
2992infy_fork (EV_P)
2993{
2994 int slot;
2995
2996 if (fs_fd < 0)
2997 return;
2998
2999 close (fs_fd);
3000 fs_fd = inotify_init ();
3001
3002 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3003 {
3004 WL w_ = fs_hash [slot].head;
3005 fs_hash [slot].head = 0;
3006
3007 while (w_)
3008 {
3009 ev_stat *w = (ev_stat *)w_;
3010 w_ = w_->next; /* lets us add this watcher */
3011
3012 w->wd = -1;
3013
3014 if (fs_fd >= 0)
3015 infy_add (EV_A_ w); /* re-add, no matter what */
3016 else
3017 ev_timer_again (EV_A_ &w->timer);
3018 }
3019 }
3020}
3021
3022#endif
3023
3024#ifdef _WIN32
3025# define EV_LSTAT(p,b) _stati64 (p, b)
3026#else
3027# define EV_LSTAT(p,b) lstat (p, b)
3028#endif
3029
1511void 3030void
1512ev_check_start (EV_P_ struct ev_check *w) 3031ev_stat_stat (EV_P_ ev_stat *w)
3032{
3033 if (lstat (w->path, &w->attr) < 0)
3034 w->attr.st_nlink = 0;
3035 else if (!w->attr.st_nlink)
3036 w->attr.st_nlink = 1;
3037}
3038
3039static void noinline
3040stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3041{
3042 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3043
3044 /* we copy this here each the time so that */
3045 /* prev has the old value when the callback gets invoked */
3046 w->prev = w->attr;
3047 ev_stat_stat (EV_A_ w);
3048
3049 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3050 if (
3051 w->prev.st_dev != w->attr.st_dev
3052 || w->prev.st_ino != w->attr.st_ino
3053 || w->prev.st_mode != w->attr.st_mode
3054 || w->prev.st_nlink != w->attr.st_nlink
3055 || w->prev.st_uid != w->attr.st_uid
3056 || w->prev.st_gid != w->attr.st_gid
3057 || w->prev.st_rdev != w->attr.st_rdev
3058 || w->prev.st_size != w->attr.st_size
3059 || w->prev.st_atime != w->attr.st_atime
3060 || w->prev.st_mtime != w->attr.st_mtime
3061 || w->prev.st_ctime != w->attr.st_ctime
3062 ) {
3063 #if EV_USE_INOTIFY
3064 if (fs_fd >= 0)
3065 {
3066 infy_del (EV_A_ w);
3067 infy_add (EV_A_ w);
3068 ev_stat_stat (EV_A_ w); /* avoid race... */
3069 }
3070 #endif
3071
3072 ev_feed_event (EV_A_ w, EV_STAT);
3073 }
3074}
3075
3076void
3077ev_stat_start (EV_P_ ev_stat *w)
1513{ 3078{
1514 if (expect_false (ev_is_active (w))) 3079 if (expect_false (ev_is_active (w)))
1515 return; 3080 return;
1516 3081
3082 ev_stat_stat (EV_A_ w);
3083
3084 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3085 w->interval = MIN_STAT_INTERVAL;
3086
3087 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3088 ev_set_priority (&w->timer, ev_priority (w));
3089
3090#if EV_USE_INOTIFY
3091 infy_init (EV_A);
3092
3093 if (fs_fd >= 0)
3094 infy_add (EV_A_ w);
3095 else
3096#endif
3097 ev_timer_again (EV_A_ &w->timer);
3098
1517 ev_start (EV_A_ (W)w, ++checkcnt); 3099 ev_start (EV_A_ (W)w, 1);
1518 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1519 checks [checkcnt - 1] = w;
1520}
1521 3100
3101 EV_FREQUENT_CHECK;
3102}
3103
1522void 3104void
1523ev_check_stop (EV_P_ struct ev_check *w) 3105ev_stat_stop (EV_P_ ev_stat *w)
1524{ 3106{
1525 ev_clear_pending (EV_A_ (W)w); 3107 clear_pending (EV_A_ (W)w);
1526 if (expect_false (!ev_is_active (w))) 3108 if (expect_false (!ev_is_active (w)))
1527 return; 3109 return;
1528 3110
1529 checks [((W)w)->active - 1] = checks [--checkcnt]; 3111 EV_FREQUENT_CHECK;
3112
3113#if EV_USE_INOTIFY
3114 infy_del (EV_A_ w);
3115#endif
3116 ev_timer_stop (EV_A_ &w->timer);
3117
1530 ev_stop (EV_A_ (W)w); 3118 ev_stop (EV_A_ (W)w);
1531}
1532 3119
1533#ifndef SA_RESTART 3120 EV_FREQUENT_CHECK;
1534# define SA_RESTART 0 3121}
1535#endif 3122#endif
1536 3123
3124#if EV_IDLE_ENABLE
1537void 3125void
1538ev_signal_start (EV_P_ struct ev_signal *w) 3126ev_idle_start (EV_P_ ev_idle *w)
1539{ 3127{
1540#if EV_MULTIPLICITY
1541 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1542#endif
1543 if (expect_false (ev_is_active (w))) 3128 if (expect_false (ev_is_active (w)))
1544 return; 3129 return;
1545 3130
1546 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3131 pri_adjust (EV_A_ (W)w);
1547 3132
3133 EV_FREQUENT_CHECK;
3134
3135 {
3136 int active = ++idlecnt [ABSPRI (w)];
3137
3138 ++idleall;
1548 ev_start (EV_A_ (W)w, 1); 3139 ev_start (EV_A_ (W)w, active);
1549 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1550 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1551 3140
1552 if (!((WL)w)->next) 3141 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1553 { 3142 idles [ABSPRI (w)][active - 1] = w;
1554#if _WIN32
1555 signal (w->signum, sighandler);
1556#else
1557 struct sigaction sa;
1558 sa.sa_handler = sighandler;
1559 sigfillset (&sa.sa_mask);
1560 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1561 sigaction (w->signum, &sa, 0);
1562#endif
1563 } 3143 }
1564}
1565 3144
3145 EV_FREQUENT_CHECK;
3146}
3147
1566void 3148void
1567ev_signal_stop (EV_P_ struct ev_signal *w) 3149ev_idle_stop (EV_P_ ev_idle *w)
1568{ 3150{
1569 ev_clear_pending (EV_A_ (W)w); 3151 clear_pending (EV_A_ (W)w);
1570 if (expect_false (!ev_is_active (w))) 3152 if (expect_false (!ev_is_active (w)))
1571 return; 3153 return;
1572 3154
1573 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3155 EV_FREQUENT_CHECK;
3156
3157 {
3158 int active = ev_active (w);
3159
3160 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3161 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3162
1574 ev_stop (EV_A_ (W)w); 3163 ev_stop (EV_A_ (W)w);
3164 --idleall;
3165 }
1575 3166
1576 if (!signals [w->signum - 1].head) 3167 EV_FREQUENT_CHECK;
1577 signal (w->signum, SIG_DFL);
1578} 3168}
1579
1580void
1581ev_child_start (EV_P_ struct ev_child *w)
1582{
1583#if EV_MULTIPLICITY
1584 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1585#endif 3169#endif
3170
3171void
3172ev_prepare_start (EV_P_ ev_prepare *w)
3173{
1586 if (expect_false (ev_is_active (w))) 3174 if (expect_false (ev_is_active (w)))
1587 return; 3175 return;
1588 3176
3177 EV_FREQUENT_CHECK;
3178
1589 ev_start (EV_A_ (W)w, 1); 3179 ev_start (EV_A_ (W)w, ++preparecnt);
1590 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3180 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1591} 3181 prepares [preparecnt - 1] = w;
1592 3182
3183 EV_FREQUENT_CHECK;
3184}
3185
1593void 3186void
1594ev_child_stop (EV_P_ struct ev_child *w) 3187ev_prepare_stop (EV_P_ ev_prepare *w)
1595{ 3188{
1596 ev_clear_pending (EV_A_ (W)w); 3189 clear_pending (EV_A_ (W)w);
1597 if (expect_false (!ev_is_active (w))) 3190 if (expect_false (!ev_is_active (w)))
1598 return; 3191 return;
1599 3192
1600 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3193 EV_FREQUENT_CHECK;
3194
3195 {
3196 int active = ev_active (w);
3197
3198 prepares [active - 1] = prepares [--preparecnt];
3199 ev_active (prepares [active - 1]) = active;
3200 }
3201
1601 ev_stop (EV_A_ (W)w); 3202 ev_stop (EV_A_ (W)w);
3203
3204 EV_FREQUENT_CHECK;
1602} 3205}
3206
3207void
3208ev_check_start (EV_P_ ev_check *w)
3209{
3210 if (expect_false (ev_is_active (w)))
3211 return;
3212
3213 EV_FREQUENT_CHECK;
3214
3215 ev_start (EV_A_ (W)w, ++checkcnt);
3216 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3217 checks [checkcnt - 1] = w;
3218
3219 EV_FREQUENT_CHECK;
3220}
3221
3222void
3223ev_check_stop (EV_P_ ev_check *w)
3224{
3225 clear_pending (EV_A_ (W)w);
3226 if (expect_false (!ev_is_active (w)))
3227 return;
3228
3229 EV_FREQUENT_CHECK;
3230
3231 {
3232 int active = ev_active (w);
3233
3234 checks [active - 1] = checks [--checkcnt];
3235 ev_active (checks [active - 1]) = active;
3236 }
3237
3238 ev_stop (EV_A_ (W)w);
3239
3240 EV_FREQUENT_CHECK;
3241}
3242
3243#if EV_EMBED_ENABLE
3244void noinline
3245ev_embed_sweep (EV_P_ ev_embed *w)
3246{
3247 ev_loop (w->other, EVLOOP_NONBLOCK);
3248}
3249
3250static void
3251embed_io_cb (EV_P_ ev_io *io, int revents)
3252{
3253 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3254
3255 if (ev_cb (w))
3256 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3257 else
3258 ev_loop (w->other, EVLOOP_NONBLOCK);
3259}
3260
3261static void
3262embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3263{
3264 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3265
3266 {
3267 EV_P = w->other;
3268
3269 while (fdchangecnt)
3270 {
3271 fd_reify (EV_A);
3272 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3273 }
3274 }
3275}
3276
3277static void
3278embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3279{
3280 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3281
3282 ev_embed_stop (EV_A_ w);
3283
3284 {
3285 EV_P = w->other;
3286
3287 ev_loop_fork (EV_A);
3288 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3289 }
3290
3291 ev_embed_start (EV_A_ w);
3292}
3293
3294#if 0
3295static void
3296embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3297{
3298 ev_idle_stop (EV_A_ idle);
3299}
3300#endif
3301
3302void
3303ev_embed_start (EV_P_ ev_embed *w)
3304{
3305 if (expect_false (ev_is_active (w)))
3306 return;
3307
3308 {
3309 EV_P = w->other;
3310 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3311 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3312 }
3313
3314 EV_FREQUENT_CHECK;
3315
3316 ev_set_priority (&w->io, ev_priority (w));
3317 ev_io_start (EV_A_ &w->io);
3318
3319 ev_prepare_init (&w->prepare, embed_prepare_cb);
3320 ev_set_priority (&w->prepare, EV_MINPRI);
3321 ev_prepare_start (EV_A_ &w->prepare);
3322
3323 ev_fork_init (&w->fork, embed_fork_cb);
3324 ev_fork_start (EV_A_ &w->fork);
3325
3326 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3327
3328 ev_start (EV_A_ (W)w, 1);
3329
3330 EV_FREQUENT_CHECK;
3331}
3332
3333void
3334ev_embed_stop (EV_P_ ev_embed *w)
3335{
3336 clear_pending (EV_A_ (W)w);
3337 if (expect_false (!ev_is_active (w)))
3338 return;
3339
3340 EV_FREQUENT_CHECK;
3341
3342 ev_io_stop (EV_A_ &w->io);
3343 ev_prepare_stop (EV_A_ &w->prepare);
3344 ev_fork_stop (EV_A_ &w->fork);
3345
3346 EV_FREQUENT_CHECK;
3347}
3348#endif
3349
3350#if EV_FORK_ENABLE
3351void
3352ev_fork_start (EV_P_ ev_fork *w)
3353{
3354 if (expect_false (ev_is_active (w)))
3355 return;
3356
3357 EV_FREQUENT_CHECK;
3358
3359 ev_start (EV_A_ (W)w, ++forkcnt);
3360 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3361 forks [forkcnt - 1] = w;
3362
3363 EV_FREQUENT_CHECK;
3364}
3365
3366void
3367ev_fork_stop (EV_P_ ev_fork *w)
3368{
3369 clear_pending (EV_A_ (W)w);
3370 if (expect_false (!ev_is_active (w)))
3371 return;
3372
3373 EV_FREQUENT_CHECK;
3374
3375 {
3376 int active = ev_active (w);
3377
3378 forks [active - 1] = forks [--forkcnt];
3379 ev_active (forks [active - 1]) = active;
3380 }
3381
3382 ev_stop (EV_A_ (W)w);
3383
3384 EV_FREQUENT_CHECK;
3385}
3386#endif
3387
3388#if EV_ASYNC_ENABLE
3389void
3390ev_async_start (EV_P_ ev_async *w)
3391{
3392 if (expect_false (ev_is_active (w)))
3393 return;
3394
3395 evpipe_init (EV_A);
3396
3397 EV_FREQUENT_CHECK;
3398
3399 ev_start (EV_A_ (W)w, ++asynccnt);
3400 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3401 asyncs [asynccnt - 1] = w;
3402
3403 EV_FREQUENT_CHECK;
3404}
3405
3406void
3407ev_async_stop (EV_P_ ev_async *w)
3408{
3409 clear_pending (EV_A_ (W)w);
3410 if (expect_false (!ev_is_active (w)))
3411 return;
3412
3413 EV_FREQUENT_CHECK;
3414
3415 {
3416 int active = ev_active (w);
3417
3418 asyncs [active - 1] = asyncs [--asynccnt];
3419 ev_active (asyncs [active - 1]) = active;
3420 }
3421
3422 ev_stop (EV_A_ (W)w);
3423
3424 EV_FREQUENT_CHECK;
3425}
3426
3427void
3428ev_async_send (EV_P_ ev_async *w)
3429{
3430 w->sent = 1;
3431 evpipe_write (EV_A_ &async_pending);
3432}
3433#endif
1603 3434
1604/*****************************************************************************/ 3435/*****************************************************************************/
1605 3436
1606struct ev_once 3437struct ev_once
1607{ 3438{
1608 struct ev_io io; 3439 ev_io io;
1609 struct ev_timer to; 3440 ev_timer to;
1610 void (*cb)(int revents, void *arg); 3441 void (*cb)(int revents, void *arg);
1611 void *arg; 3442 void *arg;
1612}; 3443};
1613 3444
1614static void 3445static void
1615once_cb (EV_P_ struct ev_once *once, int revents) 3446once_cb (EV_P_ struct ev_once *once, int revents)
1616{ 3447{
1617 void (*cb)(int revents, void *arg) = once->cb; 3448 void (*cb)(int revents, void *arg) = once->cb;
1618 void *arg = once->arg; 3449 void *arg = once->arg;
1619 3450
1620 ev_io_stop (EV_A_ &once->io); 3451 ev_io_stop (EV_A_ &once->io);
1621 ev_timer_stop (EV_A_ &once->to); 3452 ev_timer_stop (EV_A_ &once->to);
1622 ev_free (once); 3453 ev_free (once);
1623 3454
1624 cb (revents, arg); 3455 cb (revents, arg);
1625} 3456}
1626 3457
1627static void 3458static void
1628once_cb_io (EV_P_ struct ev_io *w, int revents) 3459once_cb_io (EV_P_ ev_io *w, int revents)
1629{ 3460{
1630 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3461 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3462
3463 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1631} 3464}
1632 3465
1633static void 3466static void
1634once_cb_to (EV_P_ struct ev_timer *w, int revents) 3467once_cb_to (EV_P_ ev_timer *w, int revents)
1635{ 3468{
1636 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3469 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3470
3471 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1637} 3472}
1638 3473
1639void 3474void
1640ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3475ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1641{ 3476{
… …
1663 ev_timer_set (&once->to, timeout, 0.); 3498 ev_timer_set (&once->to, timeout, 0.);
1664 ev_timer_start (EV_A_ &once->to); 3499 ev_timer_start (EV_A_ &once->to);
1665 } 3500 }
1666} 3501}
1667 3502
3503/*****************************************************************************/
3504
3505#if EV_WALK_ENABLE
3506void
3507ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3508{
3509 int i, j;
3510 ev_watcher_list *wl, *wn;
3511
3512 if (types & (EV_IO | EV_EMBED))
3513 for (i = 0; i < anfdmax; ++i)
3514 for (wl = anfds [i].head; wl; )
3515 {
3516 wn = wl->next;
3517
3518#if EV_EMBED_ENABLE
3519 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3520 {
3521 if (types & EV_EMBED)
3522 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3523 }
3524 else
3525#endif
3526#if EV_USE_INOTIFY
3527 if (ev_cb ((ev_io *)wl) == infy_cb)
3528 ;
3529 else
3530#endif
3531 if ((ev_io *)wl != &pipe_w)
3532 if (types & EV_IO)
3533 cb (EV_A_ EV_IO, wl);
3534
3535 wl = wn;
3536 }
3537
3538 if (types & (EV_TIMER | EV_STAT))
3539 for (i = timercnt + HEAP0; i-- > HEAP0; )
3540#if EV_STAT_ENABLE
3541 /*TODO: timer is not always active*/
3542 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3543 {
3544 if (types & EV_STAT)
3545 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3546 }
3547 else
3548#endif
3549 if (types & EV_TIMER)
3550 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3551
3552#if EV_PERIODIC_ENABLE
3553 if (types & EV_PERIODIC)
3554 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3555 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3556#endif
3557
3558#if EV_IDLE_ENABLE
3559 if (types & EV_IDLE)
3560 for (j = NUMPRI; i--; )
3561 for (i = idlecnt [j]; i--; )
3562 cb (EV_A_ EV_IDLE, idles [j][i]);
3563#endif
3564
3565#if EV_FORK_ENABLE
3566 if (types & EV_FORK)
3567 for (i = forkcnt; i--; )
3568 if (ev_cb (forks [i]) != embed_fork_cb)
3569 cb (EV_A_ EV_FORK, forks [i]);
3570#endif
3571
3572#if EV_ASYNC_ENABLE
3573 if (types & EV_ASYNC)
3574 for (i = asynccnt; i--; )
3575 cb (EV_A_ EV_ASYNC, asyncs [i]);
3576#endif
3577
3578 if (types & EV_PREPARE)
3579 for (i = preparecnt; i--; )
3580#if EV_EMBED_ENABLE
3581 if (ev_cb (prepares [i]) != embed_prepare_cb)
3582#endif
3583 cb (EV_A_ EV_PREPARE, prepares [i]);
3584
3585 if (types & EV_CHECK)
3586 for (i = checkcnt; i--; )
3587 cb (EV_A_ EV_CHECK, checks [i]);
3588
3589 if (types & EV_SIGNAL)
3590 for (i = 0; i < EV_NSIG - 1; ++i)
3591 for (wl = signals [i].head; wl; )
3592 {
3593 wn = wl->next;
3594 cb (EV_A_ EV_SIGNAL, wl);
3595 wl = wn;
3596 }
3597
3598 if (types & EV_CHILD)
3599 for (i = EV_PID_HASHSIZE; i--; )
3600 for (wl = childs [i]; wl; )
3601 {
3602 wn = wl->next;
3603 cb (EV_A_ EV_CHILD, wl);
3604 wl = wn;
3605 }
3606/* EV_STAT 0x00001000 /* stat data changed */
3607/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3608}
3609#endif
3610
3611#if EV_MULTIPLICITY
3612 #include "ev_wrap.h"
3613#endif
3614
1668#ifdef __cplusplus 3615#ifdef __cplusplus
1669} 3616}
1670#endif 3617#endif
1671 3618

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