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Comparing libev/ev.c (file contents):
Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC vs.
Revision 1.278 by root, Tue Jan 6 19:46:56 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
33 63
34# if HAVE_CLOCK_GETTIME 64# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 66# define EV_USE_MONOTONIC 1
67# endif
68# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 69# define EV_USE_REALTIME 1
70# endif
71# else
72# ifndef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0
74# endif
75# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0
77# endif
37# endif 78# endif
38 79
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
40# define EV_USE_SELECT 1 82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
85# endif
41# endif 86# endif
42 87
43# if HAVE_POLL && HAVE_POLL_H 88# ifndef EV_USE_SELECT
89# if HAVE_SELECT && HAVE_SYS_SELECT_H
44# define EV_USE_POLL 1 90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif
45# endif 94# endif
46 95
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
48# define EV_USE_EPOLL 1 98# define EV_USE_POLL 1
99# else
100# define EV_USE_POLL 0
101# endif
49# endif 102# endif
50 103
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52# define EV_USE_KQUEUE 1 106# define EV_USE_EPOLL 1
107# else
108# define EV_USE_EPOLL 0
109# endif
53# endif 110# endif
111
112# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif
118# endif
119
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif
126# endif
54 127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
55#endif 144#endif
56 145
57#include <math.h> 146#include <math.h>
58#include <stdlib.h> 147#include <stdlib.h>
59#include <unistd.h>
60#include <fcntl.h> 148#include <fcntl.h>
61#include <signal.h>
62#include <stddef.h> 149#include <stddef.h>
63 150
64#include <stdio.h> 151#include <stdio.h>
65 152
66#include <assert.h> 153#include <assert.h>
67#include <errno.h> 154#include <errno.h>
68#include <sys/types.h> 155#include <sys/types.h>
156#include <time.h>
157
158#include <signal.h>
159
160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
69#ifndef WIN32 166#ifndef _WIN32
167# include <sys/time.h>
70# include <sys/wait.h> 168# include <sys/wait.h>
169# include <unistd.h>
170#else
171# include <io.h>
172# define WIN32_LEAN_AND_MEAN
173# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1
71#endif 176# endif
72#include <sys/time.h> 177#endif
73#include <time.h>
74 178
75/**/ 179/* this block tries to deduce configuration from header-defined symbols and defaults */
180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
76 188
77#ifndef EV_USE_MONOTONIC 189#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
78# define EV_USE_MONOTONIC 1 191# define EV_USE_MONOTONIC 1
192# else
193# define EV_USE_MONOTONIC 0
194# endif
195#endif
196
197#ifndef EV_USE_REALTIME
198# define EV_USE_REALTIME 0
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
206# endif
79#endif 207#endif
80 208
81#ifndef EV_USE_SELECT 209#ifndef EV_USE_SELECT
82# define EV_USE_SELECT 1 210# define EV_USE_SELECT 1
83#endif 211#endif
84 212
85#ifndef EV_USE_POLL 213#ifndef EV_USE_POLL
86# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
87#endif 219#endif
88 220
89#ifndef EV_USE_EPOLL 221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
90# define EV_USE_EPOLL 0 225# define EV_USE_EPOLL 0
226# endif
91#endif 227#endif
92 228
93#ifndef EV_USE_KQUEUE 229#ifndef EV_USE_KQUEUE
94# define EV_USE_KQUEUE 0 230# define EV_USE_KQUEUE 0
95#endif 231#endif
96 232
233#ifndef EV_USE_PORT
234# define EV_USE_PORT 0
235#endif
236
97#ifndef EV_USE_WIN32 237#ifndef EV_USE_INOTIFY
98# ifdef WIN32 238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
99# define EV_USE_WIN32 1 239# define EV_USE_INOTIFY 1
100# else 240# else
101# define EV_USE_WIN32 0 241# define EV_USE_INOTIFY 0
102# endif 242# endif
103#endif 243#endif
104 244
105#ifndef EV_USE_REALTIME 245#ifndef EV_PID_HASHSIZE
106# define EV_USE_REALTIME 1 246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
107#endif 250# endif
251#endif
108 252
109/**/ 253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
110 288
111#ifndef CLOCK_MONOTONIC 289#ifndef CLOCK_MONOTONIC
112# undef EV_USE_MONOTONIC 290# undef EV_USE_MONOTONIC
113# define EV_USE_MONOTONIC 0 291# define EV_USE_MONOTONIC 0
114#endif 292#endif
… …
116#ifndef CLOCK_REALTIME 294#ifndef CLOCK_REALTIME
117# undef EV_USE_REALTIME 295# undef EV_USE_REALTIME
118# define EV_USE_REALTIME 0 296# define EV_USE_REALTIME 0
119#endif 297#endif
120 298
299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
307# endif
308#endif
309
310#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
320
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
121/**/ 346/**/
122 347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363
123#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
124#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
125#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
126/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
127 367
128#include "ev.h"
129
130#if __GNUC__ >= 3 368#if __GNUC__ >= 4
131# define expect(expr,value) __builtin_expect ((expr),(value)) 369# define expect(expr,value) __builtin_expect ((expr),(value))
132# define inline inline 370# define noinline __attribute__ ((noinline))
133#else 371#else
134# define expect(expr,value) (expr) 372# define expect(expr,value) (expr)
135# define inline static 373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
136#endif 377#endif
137 378
138#define expect_false(expr) expect ((expr) != 0, 0) 379#define expect_false(expr) expect ((expr) != 0, 0)
139#define expect_true(expr) expect ((expr) != 0, 1) 380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
140 388
141#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
142#define ABSPRI(w) ((w)->priority - EV_MINPRI) 390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
143 391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
144typedef struct ev_watcher *W; 395typedef ev_watcher *W;
145typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
146typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
147 398
399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_MONOTONIC
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
148static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 405static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
406#endif
407
408#ifdef _WIN32
409# include "ev_win32.c"
410#endif
149 411
150/*****************************************************************************/ 412/*****************************************************************************/
151 413
414static void (*syserr_cb)(const char *msg);
415
416void
417ev_set_syserr_cb (void (*cb)(const char *msg))
418{
419 syserr_cb = cb;
420}
421
422static void noinline
423ev_syserr (const char *msg)
424{
425 if (!msg)
426 msg = "(libev) system error";
427
428 if (syserr_cb)
429 syserr_cb (msg);
430 else
431 {
432 perror (msg);
433 abort ();
434 }
435}
436
437static void *
438ev_realloc_emul (void *ptr, long size)
439{
440 /* some systems, notably openbsd and darwin, fail to properly
441 * implement realloc (x, 0) (as required by both ansi c-98 and
442 * the single unix specification, so work around them here.
443 */
444
445 if (size)
446 return realloc (ptr, size);
447
448 free (ptr);
449 return 0;
450}
451
452static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
453
454void
455ev_set_allocator (void *(*cb)(void *ptr, long size))
456{
457 alloc = cb;
458}
459
460inline_speed void *
461ev_realloc (void *ptr, long size)
462{
463 ptr = alloc (ptr, size);
464
465 if (!ptr && size)
466 {
467 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
468 abort ();
469 }
470
471 return ptr;
472}
473
474#define ev_malloc(size) ev_realloc (0, (size))
475#define ev_free(ptr) ev_realloc ((ptr), 0)
476
477/*****************************************************************************/
478
152typedef struct 479typedef struct
153{ 480{
154 struct ev_watcher_list *head; 481 WL head;
155 unsigned char events; 482 unsigned char events;
156 unsigned char reify; 483 unsigned char reify;
484 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
485 unsigned char unused;
486#if EV_USE_EPOLL
487 unsigned int egen; /* generation counter to counter epoll bugs */
488#endif
489#if EV_SELECT_IS_WINSOCKET
490 SOCKET handle;
491#endif
157} ANFD; 492} ANFD;
158 493
159typedef struct 494typedef struct
160{ 495{
161 W w; 496 W w;
162 int events; 497 int events;
163} ANPENDING; 498} ANPENDING;
164 499
500#if EV_USE_INOTIFY
501/* hash table entry per inotify-id */
502typedef struct
503{
504 WL head;
505} ANFS;
506#endif
507
508/* Heap Entry */
509#if EV_HEAP_CACHE_AT
510 typedef struct {
511 ev_tstamp at;
512 WT w;
513 } ANHE;
514
515 #define ANHE_w(he) (he).w /* access watcher, read-write */
516 #define ANHE_at(he) (he).at /* access cached at, read-only */
517 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
518#else
519 typedef WT ANHE;
520
521 #define ANHE_w(he) (he)
522 #define ANHE_at(he) (he)->at
523 #define ANHE_at_cache(he)
524#endif
525
165#if EV_MULTIPLICITY 526#if EV_MULTIPLICITY
166 527
167struct ev_loop 528 struct ev_loop
168{ 529 {
530 ev_tstamp ev_rt_now;
531 #define ev_rt_now ((loop)->ev_rt_now)
169# define VAR(name,decl) decl; 532 #define VAR(name,decl) decl;
170# include "ev_vars.h" 533 #include "ev_vars.h"
171};
172# undef VAR 534 #undef VAR
535 };
173# include "ev_wrap.h" 536 #include "ev_wrap.h"
537
538 static struct ev_loop default_loop_struct;
539 struct ev_loop *ev_default_loop_ptr;
174 540
175#else 541#else
176 542
543 ev_tstamp ev_rt_now;
177# define VAR(name,decl) static decl; 544 #define VAR(name,decl) static decl;
178# include "ev_vars.h" 545 #include "ev_vars.h"
179# undef VAR 546 #undef VAR
547
548 static int ev_default_loop_ptr;
180 549
181#endif 550#endif
182 551
183/*****************************************************************************/ 552/*****************************************************************************/
184 553
185inline ev_tstamp 554ev_tstamp
186ev_time (void) 555ev_time (void)
187{ 556{
188#if EV_USE_REALTIME 557#if EV_USE_REALTIME
189 struct timespec ts; 558 struct timespec ts;
190 clock_gettime (CLOCK_REALTIME, &ts); 559 clock_gettime (CLOCK_REALTIME, &ts);
… …
194 gettimeofday (&tv, 0); 563 gettimeofday (&tv, 0);
195 return tv.tv_sec + tv.tv_usec * 1e-6; 564 return tv.tv_sec + tv.tv_usec * 1e-6;
196#endif 565#endif
197} 566}
198 567
199inline ev_tstamp 568ev_tstamp inline_size
200get_clock (void) 569get_clock (void)
201{ 570{
202#if EV_USE_MONOTONIC 571#if EV_USE_MONOTONIC
203 if (expect_true (have_monotonic)) 572 if (expect_true (have_monotonic))
204 { 573 {
… …
209#endif 578#endif
210 579
211 return ev_time (); 580 return ev_time ();
212} 581}
213 582
583#if EV_MULTIPLICITY
214ev_tstamp 584ev_tstamp
215ev_now (EV_P) 585ev_now (EV_P)
216{ 586{
217 return rt_now; 587 return ev_rt_now;
218} 588}
589#endif
219 590
220#define array_roundsize(base,n) ((n) | 4 & ~3) 591void
221 592ev_sleep (ev_tstamp delay)
222#define array_needsize(base,cur,cnt,init) \ 593{
223 if (expect_false ((cnt) > cur)) \ 594 if (delay > 0.)
224 { \
225 int newcnt = cur; \
226 do \
227 { \
228 newcnt = array_roundsize (base, newcnt << 1); \
229 } \
230 while ((cnt) > newcnt); \
231 \
232 base = realloc (base, sizeof (*base) * (newcnt)); \
233 init (base + cur, newcnt - cur); \
234 cur = newcnt; \
235 } 595 {
596#if EV_USE_NANOSLEEP
597 struct timespec ts;
598
599 ts.tv_sec = (time_t)delay;
600 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
601
602 nanosleep (&ts, 0);
603#elif defined(_WIN32)
604 Sleep ((unsigned long)(delay * 1e3));
605#else
606 struct timeval tv;
607
608 tv.tv_sec = (time_t)delay;
609 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
610
611 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
612 /* somehting nto guaranteed by newer posix versions, but guaranteed */
613 /* by older ones */
614 select (0, 0, 0, 0, &tv);
615#endif
616 }
617}
236 618
237/*****************************************************************************/ 619/*****************************************************************************/
238 620
239static void 621#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
240anfds_init (ANFD *base, int count)
241{
242 while (count--)
243 {
244 base->head = 0;
245 base->events = EV_NONE;
246 base->reify = 0;
247 622
248 ++base; 623int inline_size
624array_nextsize (int elem, int cur, int cnt)
625{
626 int ncur = cur + 1;
627
628 do
629 ncur <<= 1;
630 while (cnt > ncur);
631
632 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
633 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
249 } 634 {
250} 635 ncur *= elem;
251 636 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
252static void 637 ncur = ncur - sizeof (void *) * 4;
253event (EV_P_ W w, int events) 638 ncur /= elem;
254{
255 if (w->pending)
256 { 639 }
640
641 return ncur;
642}
643
644static noinline void *
645array_realloc (int elem, void *base, int *cur, int cnt)
646{
647 *cur = array_nextsize (elem, *cur, cnt);
648 return ev_realloc (base, elem * *cur);
649}
650
651#define array_init_zero(base,count) \
652 memset ((void *)(base), 0, sizeof (*(base)) * (count))
653
654#define array_needsize(type,base,cur,cnt,init) \
655 if (expect_false ((cnt) > (cur))) \
656 { \
657 int ocur_ = (cur); \
658 (base) = (type *)array_realloc \
659 (sizeof (type), (base), &(cur), (cnt)); \
660 init ((base) + (ocur_), (cur) - ocur_); \
661 }
662
663#if 0
664#define array_slim(type,stem) \
665 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
666 { \
667 stem ## max = array_roundsize (stem ## cnt >> 1); \
668 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
669 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
670 }
671#endif
672
673#define array_free(stem, idx) \
674 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
675
676/*****************************************************************************/
677
678void noinline
679ev_feed_event (EV_P_ void *w, int revents)
680{
681 W w_ = (W)w;
682 int pri = ABSPRI (w_);
683
684 if (expect_false (w_->pending))
685 pendings [pri][w_->pending - 1].events |= revents;
686 else
687 {
688 w_->pending = ++pendingcnt [pri];
689 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
690 pendings [pri][w_->pending - 1].w = w_;
257 pendings [ABSPRI (w)][w->pending - 1].events |= events; 691 pendings [pri][w_->pending - 1].events = revents;
258 return;
259 } 692 }
260
261 w->pending = ++pendingcnt [ABSPRI (w)];
262 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
263 pendings [ABSPRI (w)][w->pending - 1].w = w;
264 pendings [ABSPRI (w)][w->pending - 1].events = events;
265} 693}
266 694
267static void 695void inline_speed
268queue_events (EV_P_ W *events, int eventcnt, int type) 696queue_events (EV_P_ W *events, int eventcnt, int type)
269{ 697{
270 int i; 698 int i;
271 699
272 for (i = 0; i < eventcnt; ++i) 700 for (i = 0; i < eventcnt; ++i)
273 event (EV_A_ events [i], type); 701 ev_feed_event (EV_A_ events [i], type);
274} 702}
275 703
276static void 704/*****************************************************************************/
705
706void inline_speed
277fd_event (EV_P_ int fd, int events) 707fd_event (EV_P_ int fd, int revents)
278{ 708{
279 ANFD *anfd = anfds + fd; 709 ANFD *anfd = anfds + fd;
280 struct ev_io *w; 710 ev_io *w;
281 711
282 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 712 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
283 { 713 {
284 int ev = w->events & events; 714 int ev = w->events & revents;
285 715
286 if (ev) 716 if (ev)
287 event (EV_A_ (W)w, ev); 717 ev_feed_event (EV_A_ (W)w, ev);
288 } 718 }
289} 719}
290 720
291/*****************************************************************************/ 721void
722ev_feed_fd_event (EV_P_ int fd, int revents)
723{
724 if (fd >= 0 && fd < anfdmax)
725 fd_event (EV_A_ fd, revents);
726}
292 727
293static void 728void inline_size
294fd_reify (EV_P) 729fd_reify (EV_P)
295{ 730{
296 int i; 731 int i;
297 732
298 for (i = 0; i < fdchangecnt; ++i) 733 for (i = 0; i < fdchangecnt; ++i)
299 { 734 {
300 int fd = fdchanges [i]; 735 int fd = fdchanges [i];
301 ANFD *anfd = anfds + fd; 736 ANFD *anfd = anfds + fd;
302 struct ev_io *w; 737 ev_io *w;
303 738
304 int events = 0; 739 unsigned char events = 0;
305 740
306 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 741 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
307 events |= w->events; 742 events |= (unsigned char)w->events;
308 743
309 anfd->reify = 0; 744#if EV_SELECT_IS_WINSOCKET
310 745 if (events)
311 if (anfd->events != events)
312 { 746 {
313 method_modify (EV_A_ fd, anfd->events, events); 747 unsigned long arg;
314 anfd->events = events; 748 #ifdef EV_FD_TO_WIN32_HANDLE
749 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
750 #else
751 anfd->handle = _get_osfhandle (fd);
752 #endif
753 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
315 } 754 }
755#endif
756
757 {
758 unsigned char o_events = anfd->events;
759 unsigned char o_reify = anfd->reify;
760
761 anfd->reify = 0;
762 anfd->events = events;
763
764 if (o_events != events || o_reify & EV_IOFDSET)
765 backend_modify (EV_A_ fd, o_events, events);
766 }
316 } 767 }
317 768
318 fdchangecnt = 0; 769 fdchangecnt = 0;
319} 770}
320 771
321static void 772void inline_size
322fd_change (EV_P_ int fd) 773fd_change (EV_P_ int fd, int flags)
323{ 774{
324 if (anfds [fd].reify || fdchangecnt < 0) 775 unsigned char reify = anfds [fd].reify;
325 return;
326
327 anfds [fd].reify = 1; 776 anfds [fd].reify |= flags;
328 777
778 if (expect_true (!reify))
779 {
329 ++fdchangecnt; 780 ++fdchangecnt;
330 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 781 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
331 fdchanges [fdchangecnt - 1] = fd; 782 fdchanges [fdchangecnt - 1] = fd;
783 }
332} 784}
333 785
334static void 786void inline_speed
335fd_kill (EV_P_ int fd) 787fd_kill (EV_P_ int fd)
336{ 788{
337 struct ev_io *w; 789 ev_io *w;
338 790
339 while ((w = (struct ev_io *)anfds [fd].head)) 791 while ((w = (ev_io *)anfds [fd].head))
340 { 792 {
341 ev_io_stop (EV_A_ w); 793 ev_io_stop (EV_A_ w);
342 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 794 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
343 } 795 }
796}
797
798int inline_size
799fd_valid (int fd)
800{
801#ifdef _WIN32
802 return _get_osfhandle (fd) != -1;
803#else
804 return fcntl (fd, F_GETFD) != -1;
805#endif
344} 806}
345 807
346/* called on EBADF to verify fds */ 808/* called on EBADF to verify fds */
347static void 809static void noinline
348fd_ebadf (EV_P) 810fd_ebadf (EV_P)
349{ 811{
350 int fd; 812 int fd;
351 813
352 for (fd = 0; fd < anfdmax; ++fd) 814 for (fd = 0; fd < anfdmax; ++fd)
353 if (anfds [fd].events) 815 if (anfds [fd].events)
354 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 816 if (!fd_valid (fd) && errno == EBADF)
355 fd_kill (EV_A_ fd); 817 fd_kill (EV_A_ fd);
356} 818}
357 819
358/* called on ENOMEM in select/poll to kill some fds and retry */ 820/* called on ENOMEM in select/poll to kill some fds and retry */
359static void 821static void noinline
360fd_enomem (EV_P) 822fd_enomem (EV_P)
361{ 823{
362 int fd; 824 int fd;
363 825
364 for (fd = anfdmax; fd--; ) 826 for (fd = anfdmax; fd--; )
365 if (anfds [fd].events) 827 if (anfds [fd].events)
366 { 828 {
367 close (fd);
368 fd_kill (EV_A_ fd); 829 fd_kill (EV_A_ fd);
369 return; 830 return;
370 } 831 }
371} 832}
372 833
373/* susually called after fork if method needs to re-arm all fds from scratch */ 834/* usually called after fork if backend needs to re-arm all fds from scratch */
374static void 835static void noinline
375fd_rearm_all (EV_P) 836fd_rearm_all (EV_P)
376{ 837{
377 int fd; 838 int fd;
378 839
379 /* this should be highly optimised to not do anything but set a flag */
380 for (fd = 0; fd < anfdmax; ++fd) 840 for (fd = 0; fd < anfdmax; ++fd)
381 if (anfds [fd].events) 841 if (anfds [fd].events)
382 { 842 {
383 anfds [fd].events = 0; 843 anfds [fd].events = 0;
844 anfds [fd].emask = 0;
384 fd_change (EV_A_ fd); 845 fd_change (EV_A_ fd, EV_IOFDSET | 1);
385 } 846 }
386} 847}
387 848
388/*****************************************************************************/ 849/*****************************************************************************/
389 850
390static void 851/*
391upheap (WT *heap, int k) 852 * the heap functions want a real array index. array index 0 uis guaranteed to not
392{ 853 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
393 WT w = heap [k]; 854 * the branching factor of the d-tree.
855 */
394 856
395 while (k && heap [k >> 1]->at > w->at) 857/*
396 { 858 * at the moment we allow libev the luxury of two heaps,
397 heap [k] = heap [k >> 1]; 859 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
398 ((W)heap [k])->active = k + 1; 860 * which is more cache-efficient.
399 k >>= 1; 861 * the difference is about 5% with 50000+ watchers.
400 } 862 */
863#if EV_USE_4HEAP
401 864
402 heap [k] = w; 865#define DHEAP 4
403 ((W)heap [k])->active = k + 1; 866#define HEAP0 (DHEAP - 1) /* index of first element in heap */
867#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
868#define UPHEAP_DONE(p,k) ((p) == (k))
404 869
405} 870/* away from the root */
406 871void inline_speed
407static void
408downheap (WT *heap, int N, int k) 872downheap (ANHE *heap, int N, int k)
409{ 873{
410 WT w = heap [k]; 874 ANHE he = heap [k];
875 ANHE *E = heap + N + HEAP0;
411 876
412 while (k < (N >> 1)) 877 for (;;)
413 { 878 {
414 int j = k << 1; 879 ev_tstamp minat;
880 ANHE *minpos;
881 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
415 882
416 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 883 /* find minimum child */
884 if (expect_true (pos + DHEAP - 1 < E))
417 ++j; 885 {
418 886 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
419 if (w->at <= heap [j]->at) 887 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
888 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
889 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
890 }
891 else if (pos < E)
892 {
893 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
894 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
895 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
896 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
897 }
898 else
420 break; 899 break;
421 900
901 if (ANHE_at (he) <= minat)
902 break;
903
904 heap [k] = *minpos;
905 ev_active (ANHE_w (*minpos)) = k;
906
907 k = minpos - heap;
908 }
909
910 heap [k] = he;
911 ev_active (ANHE_w (he)) = k;
912}
913
914#else /* 4HEAP */
915
916#define HEAP0 1
917#define HPARENT(k) ((k) >> 1)
918#define UPHEAP_DONE(p,k) (!(p))
919
920/* away from the root */
921void inline_speed
922downheap (ANHE *heap, int N, int k)
923{
924 ANHE he = heap [k];
925
926 for (;;)
927 {
928 int c = k << 1;
929
930 if (c > N + HEAP0 - 1)
931 break;
932
933 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
934 ? 1 : 0;
935
936 if (ANHE_at (he) <= ANHE_at (heap [c]))
937 break;
938
422 heap [k] = heap [j]; 939 heap [k] = heap [c];
423 ((W)heap [k])->active = k + 1; 940 ev_active (ANHE_w (heap [k])) = k;
941
424 k = j; 942 k = c;
425 } 943 }
426 944
427 heap [k] = w; 945 heap [k] = he;
428 ((W)heap [k])->active = k + 1; 946 ev_active (ANHE_w (he)) = k;
947}
948#endif
949
950/* towards the root */
951void inline_speed
952upheap (ANHE *heap, int k)
953{
954 ANHE he = heap [k];
955
956 for (;;)
957 {
958 int p = HPARENT (k);
959
960 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
961 break;
962
963 heap [k] = heap [p];
964 ev_active (ANHE_w (heap [k])) = k;
965 k = p;
966 }
967
968 heap [k] = he;
969 ev_active (ANHE_w (he)) = k;
970}
971
972void inline_size
973adjustheap (ANHE *heap, int N, int k)
974{
975 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
976 upheap (heap, k);
977 else
978 downheap (heap, N, k);
979}
980
981/* rebuild the heap: this function is used only once and executed rarely */
982void inline_size
983reheap (ANHE *heap, int N)
984{
985 int i;
986
987 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
988 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
989 for (i = 0; i < N; ++i)
990 upheap (heap, i + HEAP0);
429} 991}
430 992
431/*****************************************************************************/ 993/*****************************************************************************/
432 994
433typedef struct 995typedef struct
434{ 996{
435 struct ev_watcher_list *head; 997 WL head;
436 sig_atomic_t volatile gotsig; 998 EV_ATOMIC_T gotsig;
437} ANSIG; 999} ANSIG;
438 1000
439static ANSIG *signals; 1001static ANSIG *signals;
440static int signalmax; 1002static int signalmax;
441 1003
442static int sigpipe [2]; 1004static EV_ATOMIC_T gotsig;
443static sig_atomic_t volatile gotsig; 1005
444static struct ev_io sigev; 1006/*****************************************************************************/
1007
1008void inline_speed
1009fd_intern (int fd)
1010{
1011#ifdef _WIN32
1012 unsigned long arg = 1;
1013 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1014#else
1015 fcntl (fd, F_SETFD, FD_CLOEXEC);
1016 fcntl (fd, F_SETFL, O_NONBLOCK);
1017#endif
1018}
1019
1020static void noinline
1021evpipe_init (EV_P)
1022{
1023 if (!ev_is_active (&pipeev))
1024 {
1025#if EV_USE_EVENTFD
1026 if ((evfd = eventfd (0, 0)) >= 0)
1027 {
1028 evpipe [0] = -1;
1029 fd_intern (evfd);
1030 ev_io_set (&pipeev, evfd, EV_READ);
1031 }
1032 else
1033#endif
1034 {
1035 while (pipe (evpipe))
1036 ev_syserr ("(libev) error creating signal/async pipe");
1037
1038 fd_intern (evpipe [0]);
1039 fd_intern (evpipe [1]);
1040 ev_io_set (&pipeev, evpipe [0], EV_READ);
1041 }
1042
1043 ev_io_start (EV_A_ &pipeev);
1044 ev_unref (EV_A); /* watcher should not keep loop alive */
1045 }
1046}
1047
1048void inline_size
1049evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1050{
1051 if (!*flag)
1052 {
1053 int old_errno = errno; /* save errno because write might clobber it */
1054
1055 *flag = 1;
1056
1057#if EV_USE_EVENTFD
1058 if (evfd >= 0)
1059 {
1060 uint64_t counter = 1;
1061 write (evfd, &counter, sizeof (uint64_t));
1062 }
1063 else
1064#endif
1065 write (evpipe [1], &old_errno, 1);
1066
1067 errno = old_errno;
1068 }
1069}
445 1070
446static void 1071static void
447signals_init (ANSIG *base, int count) 1072pipecb (EV_P_ ev_io *iow, int revents)
448{ 1073{
449 while (count--) 1074#if EV_USE_EVENTFD
1075 if (evfd >= 0)
1076 {
1077 uint64_t counter;
1078 read (evfd, &counter, sizeof (uint64_t));
450 { 1079 }
451 base->head = 0; 1080 else
1081#endif
1082 {
1083 char dummy;
1084 read (evpipe [0], &dummy, 1);
1085 }
1086
1087 if (gotsig && ev_is_default_loop (EV_A))
1088 {
1089 int signum;
452 base->gotsig = 0; 1090 gotsig = 0;
453 1091
454 ++base; 1092 for (signum = signalmax; signum--; )
1093 if (signals [signum].gotsig)
1094 ev_feed_signal_event (EV_A_ signum + 1);
1095 }
1096
1097#if EV_ASYNC_ENABLE
1098 if (gotasync)
455 } 1099 {
1100 int i;
1101 gotasync = 0;
1102
1103 for (i = asynccnt; i--; )
1104 if (asyncs [i]->sent)
1105 {
1106 asyncs [i]->sent = 0;
1107 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1108 }
1109 }
1110#endif
456} 1111}
1112
1113/*****************************************************************************/
457 1114
458static void 1115static void
459sighandler (int signum) 1116ev_sighandler (int signum)
460{ 1117{
1118#if EV_MULTIPLICITY
1119 struct ev_loop *loop = &default_loop_struct;
1120#endif
1121
1122#if _WIN32
1123 signal (signum, ev_sighandler);
1124#endif
1125
461 signals [signum - 1].gotsig = 1; 1126 signals [signum - 1].gotsig = 1;
462 1127 evpipe_write (EV_A_ &gotsig);
463 if (!gotsig)
464 {
465 int old_errno = errno;
466 gotsig = 1;
467 write (sigpipe [1], &signum, 1);
468 errno = old_errno;
469 }
470} 1128}
471 1129
472static void 1130void noinline
473sigcb (EV_P_ struct ev_io *iow, int revents) 1131ev_feed_signal_event (EV_P_ int signum)
474{ 1132{
475 struct ev_watcher_list *w; 1133 WL w;
1134
1135#if EV_MULTIPLICITY
1136 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1137#endif
1138
476 int signum; 1139 --signum;
477 1140
478 read (sigpipe [0], &revents, 1); 1141 if (signum < 0 || signum >= signalmax)
479 gotsig = 0; 1142 return;
480 1143
481 for (signum = signalmax; signum--; )
482 if (signals [signum].gotsig)
483 {
484 signals [signum].gotsig = 0; 1144 signals [signum].gotsig = 0;
485 1145
486 for (w = signals [signum].head; w; w = w->next) 1146 for (w = signals [signum].head; w; w = w->next)
487 event (EV_A_ (W)w, EV_SIGNAL); 1147 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
488 }
489}
490
491static void
492siginit (EV_P)
493{
494#ifndef WIN32
495 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
496 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
497
498 /* rather than sort out wether we really need nb, set it */
499 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
500 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
501#endif
502
503 ev_io_set (&sigev, sigpipe [0], EV_READ);
504 ev_io_start (EV_A_ &sigev);
505 ev_unref (EV_A); /* child watcher should not keep loop alive */
506} 1148}
507 1149
508/*****************************************************************************/ 1150/*****************************************************************************/
509 1151
1152static WL childs [EV_PID_HASHSIZE];
1153
510#ifndef WIN32 1154#ifndef _WIN32
511 1155
512static struct ev_child *childs [PID_HASHSIZE];
513static struct ev_signal childev; 1156static ev_signal childev;
1157
1158#ifndef WIFCONTINUED
1159# define WIFCONTINUED(status) 0
1160#endif
1161
1162void inline_speed
1163child_reap (EV_P_ int chain, int pid, int status)
1164{
1165 ev_child *w;
1166 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1167
1168 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1169 {
1170 if ((w->pid == pid || !w->pid)
1171 && (!traced || (w->flags & 1)))
1172 {
1173 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1174 w->rpid = pid;
1175 w->rstatus = status;
1176 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1177 }
1178 }
1179}
514 1180
515#ifndef WCONTINUED 1181#ifndef WCONTINUED
516# define WCONTINUED 0 1182# define WCONTINUED 0
517#endif 1183#endif
518 1184
519static void 1185static void
520child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
521{
522 struct ev_child *w;
523
524 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
525 if (w->pid == pid || !w->pid)
526 {
527 w->priority = sw->priority; /* need to do it *now* */
528 w->rpid = pid;
529 w->rstatus = status;
530 event (EV_A_ (W)w, EV_CHILD);
531 }
532}
533
534static void
535childcb (EV_P_ struct ev_signal *sw, int revents) 1186childcb (EV_P_ ev_signal *sw, int revents)
536{ 1187{
537 int pid, status; 1188 int pid, status;
538 1189
1190 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
539 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1191 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
540 { 1192 if (!WCONTINUED
1193 || errno != EINVAL
1194 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1195 return;
1196
541 /* make sure we are called again until all childs have been reaped */ 1197 /* make sure we are called again until all children have been reaped */
1198 /* we need to do it this way so that the callback gets called before we continue */
542 event (EV_A_ (W)sw, EV_SIGNAL); 1199 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
543 1200
544 child_reap (EV_A_ sw, pid, pid, status); 1201 child_reap (EV_A_ pid, pid, status);
1202 if (EV_PID_HASHSIZE > 1)
545 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1203 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
546 }
547} 1204}
548 1205
549#endif 1206#endif
550 1207
551/*****************************************************************************/ 1208/*****************************************************************************/
552 1209
1210#if EV_USE_PORT
1211# include "ev_port.c"
1212#endif
553#if EV_USE_KQUEUE 1213#if EV_USE_KQUEUE
554# include "ev_kqueue.c" 1214# include "ev_kqueue.c"
555#endif 1215#endif
556#if EV_USE_EPOLL 1216#if EV_USE_EPOLL
557# include "ev_epoll.c" 1217# include "ev_epoll.c"
… …
574{ 1234{
575 return EV_VERSION_MINOR; 1235 return EV_VERSION_MINOR;
576} 1236}
577 1237
578/* return true if we are running with elevated privileges and should ignore env variables */ 1238/* return true if we are running with elevated privileges and should ignore env variables */
579static int 1239int inline_size
580enable_secure (void) 1240enable_secure (void)
581{ 1241{
582#ifdef WIN32 1242#ifdef _WIN32
583 return 0; 1243 return 0;
584#else 1244#else
585 return getuid () != geteuid () 1245 return getuid () != geteuid ()
586 || getgid () != getegid (); 1246 || getgid () != getegid ();
587#endif 1247#endif
588} 1248}
589 1249
590int 1250unsigned int
591ev_method (EV_P) 1251ev_supported_backends (void)
592{ 1252{
593 return method; 1253 unsigned int flags = 0;
594}
595 1254
596static void 1255 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
597loop_init (EV_P_ int methods) 1256 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1257 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1258 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1259 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1260
1261 return flags;
1262}
1263
1264unsigned int
1265ev_recommended_backends (void)
598{ 1266{
599 if (!method) 1267 unsigned int flags = ev_supported_backends ();
1268
1269#ifndef __NetBSD__
1270 /* kqueue is borked on everything but netbsd apparently */
1271 /* it usually doesn't work correctly on anything but sockets and pipes */
1272 flags &= ~EVBACKEND_KQUEUE;
1273#endif
1274#ifdef __APPLE__
1275 /* only select works correctly on that "unix-certified" platform */
1276 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1277 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1278#endif
1279
1280 return flags;
1281}
1282
1283unsigned int
1284ev_embeddable_backends (void)
1285{
1286 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1287
1288 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1289 /* please fix it and tell me how to detect the fix */
1290 flags &= ~EVBACKEND_EPOLL;
1291
1292 return flags;
1293}
1294
1295unsigned int
1296ev_backend (EV_P)
1297{
1298 return backend;
1299}
1300
1301unsigned int
1302ev_loop_count (EV_P)
1303{
1304 return loop_count;
1305}
1306
1307void
1308ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1309{
1310 io_blocktime = interval;
1311}
1312
1313void
1314ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1315{
1316 timeout_blocktime = interval;
1317}
1318
1319static void noinline
1320loop_init (EV_P_ unsigned int flags)
1321{
1322 if (!backend)
600 { 1323 {
601#if EV_USE_MONOTONIC 1324#if EV_USE_MONOTONIC
602 { 1325 {
603 struct timespec ts; 1326 struct timespec ts;
604 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1327 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
605 have_monotonic = 1; 1328 have_monotonic = 1;
606 } 1329 }
607#endif 1330#endif
608 1331
609 rt_now = ev_time (); 1332 ev_rt_now = ev_time ();
610 mn_now = get_clock (); 1333 mn_now = get_clock ();
611 now_floor = mn_now; 1334 now_floor = mn_now;
612 rtmn_diff = rt_now - mn_now; 1335 rtmn_diff = ev_rt_now - mn_now;
613 1336
614 if (methods == EVMETHOD_AUTO) 1337 io_blocktime = 0.;
615 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1338 timeout_blocktime = 0.;
1339 backend = 0;
1340 backend_fd = -1;
1341 gotasync = 0;
1342#if EV_USE_INOTIFY
1343 fs_fd = -2;
1344#endif
1345
1346 /* pid check not overridable via env */
1347#ifndef _WIN32
1348 if (flags & EVFLAG_FORKCHECK)
1349 curpid = getpid ();
1350#endif
1351
1352 if (!(flags & EVFLAG_NOENV)
1353 && !enable_secure ()
1354 && getenv ("LIBEV_FLAGS"))
616 methods = atoi (getenv ("LIBEV_METHODS")); 1355 flags = atoi (getenv ("LIBEV_FLAGS"));
617 else
618 methods = EVMETHOD_ANY;
619 1356
620 method = 0; 1357 if (!(flags & 0x0000ffffU))
621#if EV_USE_WIN32 1358 flags |= ev_recommended_backends ();
622 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1359
1360#if EV_USE_PORT
1361 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
623#endif 1362#endif
624#if EV_USE_KQUEUE 1363#if EV_USE_KQUEUE
625 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1364 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
626#endif 1365#endif
627#if EV_USE_EPOLL 1366#if EV_USE_EPOLL
628 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1367 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
629#endif 1368#endif
630#if EV_USE_POLL 1369#if EV_USE_POLL
631 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1370 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
632#endif 1371#endif
633#if EV_USE_SELECT 1372#if EV_USE_SELECT
634 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1373 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
635#endif 1374#endif
636 }
637}
638 1375
639void 1376 ev_init (&pipeev, pipecb);
1377 ev_set_priority (&pipeev, EV_MAXPRI);
1378 }
1379}
1380
1381static void noinline
640loop_destroy (EV_P) 1382loop_destroy (EV_P)
641{ 1383{
1384 int i;
1385
1386 if (ev_is_active (&pipeev))
1387 {
1388 ev_ref (EV_A); /* signal watcher */
1389 ev_io_stop (EV_A_ &pipeev);
1390
1391#if EV_USE_EVENTFD
1392 if (evfd >= 0)
1393 close (evfd);
1394#endif
1395
1396 if (evpipe [0] >= 0)
1397 {
1398 close (evpipe [0]);
1399 close (evpipe [1]);
1400 }
1401 }
1402
642#if EV_USE_WIN32 1403#if EV_USE_INOTIFY
643 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1404 if (fs_fd >= 0)
1405 close (fs_fd);
1406#endif
1407
1408 if (backend_fd >= 0)
1409 close (backend_fd);
1410
1411#if EV_USE_PORT
1412 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
644#endif 1413#endif
645#if EV_USE_KQUEUE 1414#if EV_USE_KQUEUE
646 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1415 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
647#endif 1416#endif
648#if EV_USE_EPOLL 1417#if EV_USE_EPOLL
649 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1418 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
650#endif 1419#endif
651#if EV_USE_POLL 1420#if EV_USE_POLL
652 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1421 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
653#endif 1422#endif
654#if EV_USE_SELECT 1423#if EV_USE_SELECT
655 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1424 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
656#endif 1425#endif
657 1426
658 method = 0; 1427 for (i = NUMPRI; i--; )
659 /*TODO*/ 1428 {
660} 1429 array_free (pending, [i]);
1430#if EV_IDLE_ENABLE
1431 array_free (idle, [i]);
1432#endif
1433 }
661 1434
662void 1435 ev_free (anfds); anfdmax = 0;
1436
1437 /* have to use the microsoft-never-gets-it-right macro */
1438 array_free (fdchange, EMPTY);
1439 array_free (timer, EMPTY);
1440#if EV_PERIODIC_ENABLE
1441 array_free (periodic, EMPTY);
1442#endif
1443#if EV_FORK_ENABLE
1444 array_free (fork, EMPTY);
1445#endif
1446 array_free (prepare, EMPTY);
1447 array_free (check, EMPTY);
1448#if EV_ASYNC_ENABLE
1449 array_free (async, EMPTY);
1450#endif
1451
1452 backend = 0;
1453}
1454
1455#if EV_USE_INOTIFY
1456void inline_size infy_fork (EV_P);
1457#endif
1458
1459void inline_size
663loop_fork (EV_P) 1460loop_fork (EV_P)
664{ 1461{
665 /*TODO*/ 1462#if EV_USE_PORT
1463 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1464#endif
1465#if EV_USE_KQUEUE
1466 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1467#endif
666#if EV_USE_EPOLL 1468#if EV_USE_EPOLL
667 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1469 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1470#endif
1471#if EV_USE_INOTIFY
1472 infy_fork (EV_A);
1473#endif
1474
1475 if (ev_is_active (&pipeev))
1476 {
1477 /* this "locks" the handlers against writing to the pipe */
1478 /* while we modify the fd vars */
1479 gotsig = 1;
1480#if EV_ASYNC_ENABLE
1481 gotasync = 1;
1482#endif
1483
1484 ev_ref (EV_A);
1485 ev_io_stop (EV_A_ &pipeev);
1486
1487#if EV_USE_EVENTFD
1488 if (evfd >= 0)
1489 close (evfd);
1490#endif
1491
1492 if (evpipe [0] >= 0)
1493 {
1494 close (evpipe [0]);
1495 close (evpipe [1]);
1496 }
1497
1498 evpipe_init (EV_A);
1499 /* now iterate over everything, in case we missed something */
1500 pipecb (EV_A_ &pipeev, EV_READ);
1501 }
1502
1503 postfork = 0;
1504}
1505
1506#if EV_MULTIPLICITY
1507
1508struct ev_loop *
1509ev_loop_new (unsigned int flags)
1510{
1511 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1512
1513 memset (loop, 0, sizeof (struct ev_loop));
1514
1515 loop_init (EV_A_ flags);
1516
1517 if (ev_backend (EV_A))
1518 return loop;
1519
1520 return 0;
1521}
1522
1523void
1524ev_loop_destroy (EV_P)
1525{
1526 loop_destroy (EV_A);
1527 ev_free (loop);
1528}
1529
1530void
1531ev_loop_fork (EV_P)
1532{
1533 postfork = 1; /* must be in line with ev_default_fork */
1534}
1535
1536#if EV_VERIFY
1537static void noinline
1538verify_watcher (EV_P_ W w)
1539{
1540 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1541
1542 if (w->pending)
1543 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1544}
1545
1546static void noinline
1547verify_heap (EV_P_ ANHE *heap, int N)
1548{
1549 int i;
1550
1551 for (i = HEAP0; i < N + HEAP0; ++i)
1552 {
1553 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1554 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1555 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1556
1557 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1558 }
1559}
1560
1561static void noinline
1562array_verify (EV_P_ W *ws, int cnt)
1563{
1564 while (cnt--)
1565 {
1566 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1567 verify_watcher (EV_A_ ws [cnt]);
1568 }
1569}
1570#endif
1571
1572void
1573ev_loop_verify (EV_P)
1574{
1575#if EV_VERIFY
1576 int i;
1577 WL w;
1578
1579 assert (activecnt >= -1);
1580
1581 assert (fdchangemax >= fdchangecnt);
1582 for (i = 0; i < fdchangecnt; ++i)
1583 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1584
1585 assert (anfdmax >= 0);
1586 for (i = 0; i < anfdmax; ++i)
1587 for (w = anfds [i].head; w; w = w->next)
1588 {
1589 verify_watcher (EV_A_ (W)w);
1590 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1591 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1592 }
1593
1594 assert (timermax >= timercnt);
1595 verify_heap (EV_A_ timers, timercnt);
1596
1597#if EV_PERIODIC_ENABLE
1598 assert (periodicmax >= periodiccnt);
1599 verify_heap (EV_A_ periodics, periodiccnt);
1600#endif
1601
1602 for (i = NUMPRI; i--; )
1603 {
1604 assert (pendingmax [i] >= pendingcnt [i]);
1605#if EV_IDLE_ENABLE
1606 assert (idleall >= 0);
1607 assert (idlemax [i] >= idlecnt [i]);
1608 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1609#endif
1610 }
1611
1612#if EV_FORK_ENABLE
1613 assert (forkmax >= forkcnt);
1614 array_verify (EV_A_ (W *)forks, forkcnt);
1615#endif
1616
1617#if EV_ASYNC_ENABLE
1618 assert (asyncmax >= asynccnt);
1619 array_verify (EV_A_ (W *)asyncs, asynccnt);
1620#endif
1621
1622 assert (preparemax >= preparecnt);
1623 array_verify (EV_A_ (W *)prepares, preparecnt);
1624
1625 assert (checkmax >= checkcnt);
1626 array_verify (EV_A_ (W *)checks, checkcnt);
1627
1628# if 0
1629 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1630 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
668#endif 1631# endif
669#if EV_USE_KQUEUE
670 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
671#endif 1632#endif
672} 1633}
1634
1635#endif /* multiplicity */
673 1636
674#if EV_MULTIPLICITY 1637#if EV_MULTIPLICITY
675struct ev_loop * 1638struct ev_loop *
676ev_loop_new (int methods) 1639ev_default_loop_init (unsigned int flags)
677{ 1640#else
678 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); 1641int
679 1642ev_default_loop (unsigned int flags)
680 loop_init (EV_A_ methods);
681
682 if (ev_method (EV_A))
683 return loop;
684
685 return 0;
686}
687
688void
689ev_loop_destroy (EV_P)
690{
691 loop_destroy (EV_A);
692 free (loop);
693}
694
695void
696ev_loop_fork (EV_P)
697{
698 loop_fork (EV_A);
699}
700
701#endif 1643#endif
702 1644{
1645 if (!ev_default_loop_ptr)
1646 {
703#if EV_MULTIPLICITY 1647#if EV_MULTIPLICITY
704struct ev_loop default_loop_struct; 1648 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
705static struct ev_loop *default_loop;
706
707struct ev_loop *
708#else 1649#else
709static int default_loop;
710
711int
712#endif
713ev_default_loop (int methods)
714{
715 if (sigpipe [0] == sigpipe [1])
716 if (pipe (sigpipe))
717 return 0;
718
719 if (!default_loop)
720 {
721#if EV_MULTIPLICITY
722 struct ev_loop *loop = default_loop = &default_loop_struct;
723#else
724 default_loop = 1; 1650 ev_default_loop_ptr = 1;
725#endif 1651#endif
726 1652
727 loop_init (EV_A_ methods); 1653 loop_init (EV_A_ flags);
728 1654
729 if (ev_method (EV_A)) 1655 if (ev_backend (EV_A))
730 { 1656 {
731 ev_watcher_init (&sigev, sigcb);
732 ev_set_priority (&sigev, EV_MAXPRI);
733 siginit (EV_A);
734
735#ifndef WIN32 1657#ifndef _WIN32
736 ev_signal_init (&childev, childcb, SIGCHLD); 1658 ev_signal_init (&childev, childcb, SIGCHLD);
737 ev_set_priority (&childev, EV_MAXPRI); 1659 ev_set_priority (&childev, EV_MAXPRI);
738 ev_signal_start (EV_A_ &childev); 1660 ev_signal_start (EV_A_ &childev);
739 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1661 ev_unref (EV_A); /* child watcher should not keep loop alive */
740#endif 1662#endif
741 } 1663 }
742 else 1664 else
743 default_loop = 0; 1665 ev_default_loop_ptr = 0;
744 } 1666 }
745 1667
746 return default_loop; 1668 return ev_default_loop_ptr;
747} 1669}
748 1670
749void 1671void
750ev_default_destroy (void) 1672ev_default_destroy (void)
751{ 1673{
752#if EV_MULTIPLICITY 1674#if EV_MULTIPLICITY
753 struct ev_loop *loop = default_loop; 1675 struct ev_loop *loop = ev_default_loop_ptr;
754#endif 1676#endif
755 1677
1678 ev_default_loop_ptr = 0;
1679
1680#ifndef _WIN32
756 ev_ref (EV_A); /* child watcher */ 1681 ev_ref (EV_A); /* child watcher */
757 ev_signal_stop (EV_A_ &childev); 1682 ev_signal_stop (EV_A_ &childev);
758 1683#endif
759 ev_ref (EV_A); /* signal watcher */
760 ev_io_stop (EV_A_ &sigev);
761
762 close (sigpipe [0]); sigpipe [0] = 0;
763 close (sigpipe [1]); sigpipe [1] = 0;
764 1684
765 loop_destroy (EV_A); 1685 loop_destroy (EV_A);
766} 1686}
767 1687
768void 1688void
769ev_default_fork (void) 1689ev_default_fork (void)
770{ 1690{
771#if EV_MULTIPLICITY 1691#if EV_MULTIPLICITY
772 struct ev_loop *loop = default_loop; 1692 struct ev_loop *loop = ev_default_loop_ptr;
773#endif 1693#endif
774 1694
775 loop_fork (EV_A); 1695 postfork = 1; /* must be in line with ev_loop_fork */
776
777 ev_io_stop (EV_A_ &sigev);
778 close (sigpipe [0]);
779 close (sigpipe [1]);
780 pipe (sigpipe);
781
782 ev_ref (EV_A); /* signal watcher */
783 siginit (EV_A);
784} 1696}
785 1697
786/*****************************************************************************/ 1698/*****************************************************************************/
787 1699
788static void 1700void
1701ev_invoke (EV_P_ void *w, int revents)
1702{
1703 EV_CB_INVOKE ((W)w, revents);
1704}
1705
1706void inline_speed
789call_pending (EV_P) 1707call_pending (EV_P)
790{ 1708{
791 int pri; 1709 int pri;
792 1710
793 for (pri = NUMPRI; pri--; ) 1711 for (pri = NUMPRI; pri--; )
794 while (pendingcnt [pri]) 1712 while (pendingcnt [pri])
795 { 1713 {
796 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1714 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
797 1715
798 if (p->w) 1716 if (expect_true (p->w))
799 { 1717 {
1718 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1719
800 p->w->pending = 0; 1720 p->w->pending = 0;
801 p->w->cb (EV_A_ p->w, p->events); 1721 EV_CB_INVOKE (p->w, p->events);
1722 EV_FREQUENT_CHECK;
802 } 1723 }
803 } 1724 }
804} 1725}
805 1726
806static void 1727#if EV_IDLE_ENABLE
1728void inline_size
1729idle_reify (EV_P)
1730{
1731 if (expect_false (idleall))
1732 {
1733 int pri;
1734
1735 for (pri = NUMPRI; pri--; )
1736 {
1737 if (pendingcnt [pri])
1738 break;
1739
1740 if (idlecnt [pri])
1741 {
1742 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1743 break;
1744 }
1745 }
1746 }
1747}
1748#endif
1749
1750void inline_size
807timers_reify (EV_P) 1751timers_reify (EV_P)
808{ 1752{
1753 EV_FREQUENT_CHECK;
1754
809 while (timercnt && timers [0]->at <= mn_now) 1755 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
810 { 1756 {
811 struct ev_timer *w = timers [0]; 1757 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
812 1758
813 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1759 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
814 1760
815 /* first reschedule or stop timer */ 1761 /* first reschedule or stop timer */
816 if (w->repeat) 1762 if (w->repeat)
817 { 1763 {
1764 ev_at (w) += w->repeat;
1765 if (ev_at (w) < mn_now)
1766 ev_at (w) = mn_now;
1767
818 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1768 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
819 w->at = mn_now + w->repeat; 1769
1770 ANHE_at_cache (timers [HEAP0]);
820 downheap ((WT *)timers, timercnt, 0); 1771 downheap (timers, timercnt, HEAP0);
821 } 1772 }
822 else 1773 else
823 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1774 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
824 1775
1776 EV_FREQUENT_CHECK;
825 event (EV_A_ (W)w, EV_TIMEOUT); 1777 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
826 } 1778 }
827} 1779}
828 1780
829static void 1781#if EV_PERIODIC_ENABLE
1782void inline_size
830periodics_reify (EV_P) 1783periodics_reify (EV_P)
831{ 1784{
1785 EV_FREQUENT_CHECK;
1786
832 while (periodiccnt && periodics [0]->at <= rt_now) 1787 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
833 { 1788 {
834 struct ev_periodic *w = periodics [0]; 1789 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
835 1790
836 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1791 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
837 1792
838 /* first reschedule or stop timer */ 1793 /* first reschedule or stop timer */
839 if (w->interval) 1794 if (w->reschedule_cb)
840 { 1795 {
841 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; 1796 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
842 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); 1797
1798 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1799
1800 ANHE_at_cache (periodics [HEAP0]);
843 downheap ((WT *)periodics, periodiccnt, 0); 1801 downheap (periodics, periodiccnt, HEAP0);
1802 }
1803 else if (w->interval)
1804 {
1805 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1806 /* if next trigger time is not sufficiently in the future, put it there */
1807 /* this might happen because of floating point inexactness */
1808 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1809 {
1810 ev_at (w) += w->interval;
1811
1812 /* if interval is unreasonably low we might still have a time in the past */
1813 /* so correct this. this will make the periodic very inexact, but the user */
1814 /* has effectively asked to get triggered more often than possible */
1815 if (ev_at (w) < ev_rt_now)
1816 ev_at (w) = ev_rt_now;
1817 }
1818
1819 ANHE_at_cache (periodics [HEAP0]);
1820 downheap (periodics, periodiccnt, HEAP0);
844 } 1821 }
845 else 1822 else
846 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1823 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
847 1824
1825 EV_FREQUENT_CHECK;
848 event (EV_A_ (W)w, EV_PERIODIC); 1826 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
849 } 1827 }
850} 1828}
851 1829
852static void 1830static void noinline
853periodics_reschedule (EV_P) 1831periodics_reschedule (EV_P)
854{ 1832{
855 int i; 1833 int i;
856 1834
857 /* adjust periodics after time jump */ 1835 /* adjust periodics after time jump */
858 for (i = 0; i < periodiccnt; ++i) 1836 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
859 { 1837 {
860 struct ev_periodic *w = periodics [i]; 1838 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
861 1839
1840 if (w->reschedule_cb)
1841 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
862 if (w->interval) 1842 else if (w->interval)
1843 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1844
1845 ANHE_at_cache (periodics [i]);
1846 }
1847
1848 reheap (periodics, periodiccnt);
1849}
1850#endif
1851
1852void inline_speed
1853time_update (EV_P_ ev_tstamp max_block)
1854{
1855 int i;
1856
1857#if EV_USE_MONOTONIC
1858 if (expect_true (have_monotonic))
1859 {
1860 ev_tstamp odiff = rtmn_diff;
1861
1862 mn_now = get_clock ();
1863
1864 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1865 /* interpolate in the meantime */
1866 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
863 { 1867 {
864 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; 1868 ev_rt_now = rtmn_diff + mn_now;
1869 return;
1870 }
865 1871
866 if (fabs (diff) >= 1e-4) 1872 now_floor = mn_now;
1873 ev_rt_now = ev_time ();
1874
1875 /* loop a few times, before making important decisions.
1876 * on the choice of "4": one iteration isn't enough,
1877 * in case we get preempted during the calls to
1878 * ev_time and get_clock. a second call is almost guaranteed
1879 * to succeed in that case, though. and looping a few more times
1880 * doesn't hurt either as we only do this on time-jumps or
1881 * in the unlikely event of having been preempted here.
1882 */
1883 for (i = 4; --i; )
1884 {
1885 rtmn_diff = ev_rt_now - mn_now;
1886
1887 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1888 return; /* all is well */
1889
1890 ev_rt_now = ev_time ();
1891 mn_now = get_clock ();
1892 now_floor = mn_now;
1893 }
1894
1895# if EV_PERIODIC_ENABLE
1896 periodics_reschedule (EV_A);
1897# endif
1898 /* no timer adjustment, as the monotonic clock doesn't jump */
1899 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1900 }
1901 else
1902#endif
1903 {
1904 ev_rt_now = ev_time ();
1905
1906 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1907 {
1908#if EV_PERIODIC_ENABLE
1909 periodics_reschedule (EV_A);
1910#endif
1911 /* adjust timers. this is easy, as the offset is the same for all of them */
1912 for (i = 0; i < timercnt; ++i)
867 { 1913 {
868 ev_periodic_stop (EV_A_ w); 1914 ANHE *he = timers + i + HEAP0;
869 ev_periodic_start (EV_A_ w); 1915 ANHE_w (*he)->at += ev_rt_now - mn_now;
870 1916 ANHE_at_cache (*he);
871 i = 0; /* restart loop, inefficient, but time jumps should be rare */
872 } 1917 }
873 } 1918 }
874 }
875}
876 1919
877inline int
878time_update_monotonic (EV_P)
879{
880 mn_now = get_clock ();
881
882 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
883 {
884 rt_now = rtmn_diff + mn_now;
885 return 0;
886 }
887 else
888 {
889 now_floor = mn_now;
890 rt_now = ev_time ();
891 return 1;
892 }
893}
894
895static void
896time_update (EV_P)
897{
898 int i;
899
900#if EV_USE_MONOTONIC
901 if (expect_true (have_monotonic))
902 {
903 if (time_update_monotonic (EV_A))
904 {
905 ev_tstamp odiff = rtmn_diff;
906
907 for (i = 4; --i; ) /* loop a few times, before making important decisions */
908 {
909 rtmn_diff = rt_now - mn_now;
910
911 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
912 return; /* all is well */
913
914 rt_now = ev_time ();
915 mn_now = get_clock ();
916 now_floor = mn_now;
917 }
918
919 periodics_reschedule (EV_A);
920 /* no timer adjustment, as the monotonic clock doesn't jump */
921 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
922 }
923 }
924 else
925#endif
926 {
927 rt_now = ev_time ();
928
929 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
930 {
931 periodics_reschedule (EV_A);
932
933 /* adjust timers. this is easy, as the offset is the same for all */
934 for (i = 0; i < timercnt; ++i)
935 timers [i]->at += rt_now - mn_now;
936 }
937
938 mn_now = rt_now; 1920 mn_now = ev_rt_now;
939 } 1921 }
940} 1922}
941 1923
942void 1924void
943ev_ref (EV_P) 1925ev_ref (EV_P)
… …
949ev_unref (EV_P) 1931ev_unref (EV_P)
950{ 1932{
951 --activecnt; 1933 --activecnt;
952} 1934}
953 1935
1936void
1937ev_now_update (EV_P)
1938{
1939 time_update (EV_A_ 1e100);
1940}
1941
954static int loop_done; 1942static int loop_done;
955 1943
956void 1944void
957ev_loop (EV_P_ int flags) 1945ev_loop (EV_P_ int flags)
958{ 1946{
959 double block; 1947 loop_done = EVUNLOOP_CANCEL;
960 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1948
1949 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
961 1950
962 do 1951 do
963 { 1952 {
1953#if EV_VERIFY >= 2
1954 ev_loop_verify (EV_A);
1955#endif
1956
1957#ifndef _WIN32
1958 if (expect_false (curpid)) /* penalise the forking check even more */
1959 if (expect_false (getpid () != curpid))
1960 {
1961 curpid = getpid ();
1962 postfork = 1;
1963 }
1964#endif
1965
1966#if EV_FORK_ENABLE
1967 /* we might have forked, so queue fork handlers */
1968 if (expect_false (postfork))
1969 if (forkcnt)
1970 {
1971 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1972 call_pending (EV_A);
1973 }
1974#endif
1975
964 /* queue check watchers (and execute them) */ 1976 /* queue prepare watchers (and execute them) */
965 if (expect_false (preparecnt)) 1977 if (expect_false (preparecnt))
966 { 1978 {
967 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1979 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
968 call_pending (EV_A); 1980 call_pending (EV_A);
969 } 1981 }
970 1982
1983 if (expect_false (!activecnt))
1984 break;
1985
1986 /* we might have forked, so reify kernel state if necessary */
1987 if (expect_false (postfork))
1988 loop_fork (EV_A);
1989
971 /* update fd-related kernel structures */ 1990 /* update fd-related kernel structures */
972 fd_reify (EV_A); 1991 fd_reify (EV_A);
973 1992
974 /* calculate blocking time */ 1993 /* calculate blocking time */
1994 {
1995 ev_tstamp waittime = 0.;
1996 ev_tstamp sleeptime = 0.;
975 1997
976 /* we only need this for !monotonic clockor timers, but as we basically 1998 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
977 always have timers, we just calculate it always */
978#if EV_USE_MONOTONIC
979 if (expect_true (have_monotonic))
980 time_update_monotonic (EV_A);
981 else
982#endif
983 { 1999 {
984 rt_now = ev_time (); 2000 /* update time to cancel out callback processing overhead */
985 mn_now = rt_now; 2001 time_update (EV_A_ 1e100);
986 }
987 2002
988 if (flags & EVLOOP_NONBLOCK || idlecnt)
989 block = 0.;
990 else
991 {
992 block = MAX_BLOCKTIME; 2003 waittime = MAX_BLOCKTIME;
993 2004
994 if (timercnt) 2005 if (timercnt)
995 { 2006 {
996 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 2007 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
997 if (block > to) block = to; 2008 if (waittime > to) waittime = to;
998 } 2009 }
999 2010
2011#if EV_PERIODIC_ENABLE
1000 if (periodiccnt) 2012 if (periodiccnt)
1001 { 2013 {
1002 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 2014 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1003 if (block > to) block = to; 2015 if (waittime > to) waittime = to;
1004 } 2016 }
2017#endif
1005 2018
1006 if (block < 0.) block = 0.; 2019 if (expect_false (waittime < timeout_blocktime))
2020 waittime = timeout_blocktime;
2021
2022 sleeptime = waittime - backend_fudge;
2023
2024 if (expect_true (sleeptime > io_blocktime))
2025 sleeptime = io_blocktime;
2026
2027 if (sleeptime)
2028 {
2029 ev_sleep (sleeptime);
2030 waittime -= sleeptime;
2031 }
1007 } 2032 }
1008 2033
1009 method_poll (EV_A_ block); 2034 ++loop_count;
2035 backend_poll (EV_A_ waittime);
1010 2036
1011 /* update rt_now, do magic */ 2037 /* update ev_rt_now, do magic */
1012 time_update (EV_A); 2038 time_update (EV_A_ waittime + sleeptime);
2039 }
1013 2040
1014 /* queue pending timers and reschedule them */ 2041 /* queue pending timers and reschedule them */
1015 timers_reify (EV_A); /* relative timers called last */ 2042 timers_reify (EV_A); /* relative timers called last */
2043#if EV_PERIODIC_ENABLE
1016 periodics_reify (EV_A); /* absolute timers called first */ 2044 periodics_reify (EV_A); /* absolute timers called first */
2045#endif
1017 2046
2047#if EV_IDLE_ENABLE
1018 /* queue idle watchers unless io or timers are pending */ 2048 /* queue idle watchers unless other events are pending */
1019 if (!pendingcnt) 2049 idle_reify (EV_A);
1020 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2050#endif
1021 2051
1022 /* queue check watchers, to be executed first */ 2052 /* queue check watchers, to be executed first */
1023 if (checkcnt) 2053 if (expect_false (checkcnt))
1024 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2054 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1025 2055
1026 call_pending (EV_A); 2056 call_pending (EV_A);
1027 } 2057 }
1028 while (activecnt && !loop_done); 2058 while (expect_true (
2059 activecnt
2060 && !loop_done
2061 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2062 ));
1029 2063
1030 if (loop_done != 2) 2064 if (loop_done == EVUNLOOP_ONE)
1031 loop_done = 0; 2065 loop_done = EVUNLOOP_CANCEL;
1032} 2066}
1033 2067
1034void 2068void
1035ev_unloop (EV_P_ int how) 2069ev_unloop (EV_P_ int how)
1036{ 2070{
1037 loop_done = how; 2071 loop_done = how;
1038} 2072}
1039 2073
1040/*****************************************************************************/ 2074/*****************************************************************************/
1041 2075
1042inline void 2076void inline_size
1043wlist_add (WL *head, WL elem) 2077wlist_add (WL *head, WL elem)
1044{ 2078{
1045 elem->next = *head; 2079 elem->next = *head;
1046 *head = elem; 2080 *head = elem;
1047} 2081}
1048 2082
1049inline void 2083void inline_size
1050wlist_del (WL *head, WL elem) 2084wlist_del (WL *head, WL elem)
1051{ 2085{
1052 while (*head) 2086 while (*head)
1053 { 2087 {
1054 if (*head == elem) 2088 if (*head == elem)
… …
1059 2093
1060 head = &(*head)->next; 2094 head = &(*head)->next;
1061 } 2095 }
1062} 2096}
1063 2097
1064inline void 2098void inline_speed
1065ev_clear_pending (EV_P_ W w) 2099clear_pending (EV_P_ W w)
1066{ 2100{
1067 if (w->pending) 2101 if (w->pending)
1068 { 2102 {
1069 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2103 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1070 w->pending = 0; 2104 w->pending = 0;
1071 } 2105 }
1072} 2106}
1073 2107
1074inline void 2108int
2109ev_clear_pending (EV_P_ void *w)
2110{
2111 W w_ = (W)w;
2112 int pending = w_->pending;
2113
2114 if (expect_true (pending))
2115 {
2116 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2117 w_->pending = 0;
2118 p->w = 0;
2119 return p->events;
2120 }
2121 else
2122 return 0;
2123}
2124
2125void inline_size
2126pri_adjust (EV_P_ W w)
2127{
2128 int pri = w->priority;
2129 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2130 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2131 w->priority = pri;
2132}
2133
2134void inline_speed
1075ev_start (EV_P_ W w, int active) 2135ev_start (EV_P_ W w, int active)
1076{ 2136{
1077 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2137 pri_adjust (EV_A_ w);
1078 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1079
1080 w->active = active; 2138 w->active = active;
1081 ev_ref (EV_A); 2139 ev_ref (EV_A);
1082} 2140}
1083 2141
1084inline void 2142void inline_size
1085ev_stop (EV_P_ W w) 2143ev_stop (EV_P_ W w)
1086{ 2144{
1087 ev_unref (EV_A); 2145 ev_unref (EV_A);
1088 w->active = 0; 2146 w->active = 0;
1089} 2147}
1090 2148
1091/*****************************************************************************/ 2149/*****************************************************************************/
1092 2150
1093void 2151void noinline
1094ev_io_start (EV_P_ struct ev_io *w) 2152ev_io_start (EV_P_ ev_io *w)
1095{ 2153{
1096 int fd = w->fd; 2154 int fd = w->fd;
1097 2155
1098 if (ev_is_active (w)) 2156 if (expect_false (ev_is_active (w)))
1099 return; 2157 return;
1100 2158
1101 assert (("ev_io_start called with negative fd", fd >= 0)); 2159 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2160 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2161
2162 EV_FREQUENT_CHECK;
1102 2163
1103 ev_start (EV_A_ (W)w, 1); 2164 ev_start (EV_A_ (W)w, 1);
1104 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2165 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1105 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2166 wlist_add (&anfds[fd].head, (WL)w);
1106 2167
1107 fd_change (EV_A_ fd); 2168 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1108} 2169 w->events &= ~EV_IOFDSET;
1109 2170
1110void 2171 EV_FREQUENT_CHECK;
2172}
2173
2174void noinline
1111ev_io_stop (EV_P_ struct ev_io *w) 2175ev_io_stop (EV_P_ ev_io *w)
1112{ 2176{
1113 ev_clear_pending (EV_A_ (W)w); 2177 clear_pending (EV_A_ (W)w);
1114 if (!ev_is_active (w)) 2178 if (expect_false (!ev_is_active (w)))
1115 return; 2179 return;
1116 2180
2181 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2182
2183 EV_FREQUENT_CHECK;
2184
1117 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2185 wlist_del (&anfds[w->fd].head, (WL)w);
1118 ev_stop (EV_A_ (W)w); 2186 ev_stop (EV_A_ (W)w);
1119 2187
1120 fd_change (EV_A_ w->fd); 2188 fd_change (EV_A_ w->fd, 1);
1121}
1122 2189
1123void 2190 EV_FREQUENT_CHECK;
2191}
2192
2193void noinline
1124ev_timer_start (EV_P_ struct ev_timer *w) 2194ev_timer_start (EV_P_ ev_timer *w)
1125{ 2195{
1126 if (ev_is_active (w)) 2196 if (expect_false (ev_is_active (w)))
1127 return; 2197 return;
1128 2198
1129 w->at += mn_now; 2199 ev_at (w) += mn_now;
1130 2200
1131 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2201 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1132 2202
2203 EV_FREQUENT_CHECK;
2204
2205 ++timercnt;
1133 ev_start (EV_A_ (W)w, ++timercnt); 2206 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1134 array_needsize (timers, timermax, timercnt, ); 2207 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1135 timers [timercnt - 1] = w; 2208 ANHE_w (timers [ev_active (w)]) = (WT)w;
1136 upheap ((WT *)timers, timercnt - 1); 2209 ANHE_at_cache (timers [ev_active (w)]);
2210 upheap (timers, ev_active (w));
1137 2211
2212 EV_FREQUENT_CHECK;
2213
1138 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2214 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1139} 2215}
1140 2216
1141void 2217void noinline
1142ev_timer_stop (EV_P_ struct ev_timer *w) 2218ev_timer_stop (EV_P_ ev_timer *w)
1143{ 2219{
1144 ev_clear_pending (EV_A_ (W)w); 2220 clear_pending (EV_A_ (W)w);
1145 if (!ev_is_active (w)) 2221 if (expect_false (!ev_is_active (w)))
1146 return; 2222 return;
1147 2223
2224 EV_FREQUENT_CHECK;
2225
2226 {
2227 int active = ev_active (w);
2228
1148 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2229 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1149 2230
1150 if (((W)w)->active < timercnt--) 2231 --timercnt;
2232
2233 if (expect_true (active < timercnt + HEAP0))
1151 { 2234 {
1152 timers [((W)w)->active - 1] = timers [timercnt]; 2235 timers [active] = timers [timercnt + HEAP0];
1153 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2236 adjustheap (timers, timercnt, active);
1154 } 2237 }
2238 }
1155 2239
1156 w->at = w->repeat; 2240 EV_FREQUENT_CHECK;
2241
2242 ev_at (w) -= mn_now;
1157 2243
1158 ev_stop (EV_A_ (W)w); 2244 ev_stop (EV_A_ (W)w);
1159} 2245}
1160 2246
1161void 2247void noinline
1162ev_timer_again (EV_P_ struct ev_timer *w) 2248ev_timer_again (EV_P_ ev_timer *w)
1163{ 2249{
2250 EV_FREQUENT_CHECK;
2251
1164 if (ev_is_active (w)) 2252 if (ev_is_active (w))
1165 { 2253 {
1166 if (w->repeat) 2254 if (w->repeat)
1167 { 2255 {
1168 w->at = mn_now + w->repeat; 2256 ev_at (w) = mn_now + w->repeat;
1169 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2257 ANHE_at_cache (timers [ev_active (w)]);
2258 adjustheap (timers, timercnt, ev_active (w));
1170 } 2259 }
1171 else 2260 else
1172 ev_timer_stop (EV_A_ w); 2261 ev_timer_stop (EV_A_ w);
1173 } 2262 }
1174 else if (w->repeat) 2263 else if (w->repeat)
2264 {
2265 ev_at (w) = w->repeat;
1175 ev_timer_start (EV_A_ w); 2266 ev_timer_start (EV_A_ w);
1176} 2267 }
1177 2268
1178void 2269 EV_FREQUENT_CHECK;
2270}
2271
2272#if EV_PERIODIC_ENABLE
2273void noinline
1179ev_periodic_start (EV_P_ struct ev_periodic *w) 2274ev_periodic_start (EV_P_ ev_periodic *w)
1180{ 2275{
1181 if (ev_is_active (w)) 2276 if (expect_false (ev_is_active (w)))
1182 return; 2277 return;
1183 2278
2279 if (w->reschedule_cb)
2280 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2281 else if (w->interval)
2282 {
1184 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2283 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1185
1186 /* this formula differs from the one in periodic_reify because we do not always round up */ 2284 /* this formula differs from the one in periodic_reify because we do not always round up */
1187 if (w->interval)
1188 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 2285 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2286 }
2287 else
2288 ev_at (w) = w->offset;
1189 2289
2290 EV_FREQUENT_CHECK;
2291
2292 ++periodiccnt;
1190 ev_start (EV_A_ (W)w, ++periodiccnt); 2293 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1191 array_needsize (periodics, periodicmax, periodiccnt, ); 2294 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1192 periodics [periodiccnt - 1] = w; 2295 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1193 upheap ((WT *)periodics, periodiccnt - 1); 2296 ANHE_at_cache (periodics [ev_active (w)]);
2297 upheap (periodics, ev_active (w));
1194 2298
2299 EV_FREQUENT_CHECK;
2300
1195 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2301 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1196} 2302}
1197 2303
1198void 2304void noinline
1199ev_periodic_stop (EV_P_ struct ev_periodic *w) 2305ev_periodic_stop (EV_P_ ev_periodic *w)
1200{ 2306{
1201 ev_clear_pending (EV_A_ (W)w); 2307 clear_pending (EV_A_ (W)w);
1202 if (!ev_is_active (w)) 2308 if (expect_false (!ev_is_active (w)))
1203 return; 2309 return;
1204 2310
2311 EV_FREQUENT_CHECK;
2312
2313 {
2314 int active = ev_active (w);
2315
1205 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2316 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1206 2317
1207 if (((W)w)->active < periodiccnt--) 2318 --periodiccnt;
2319
2320 if (expect_true (active < periodiccnt + HEAP0))
1208 { 2321 {
1209 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2322 periodics [active] = periodics [periodiccnt + HEAP0];
1210 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2323 adjustheap (periodics, periodiccnt, active);
1211 } 2324 }
2325 }
2326
2327 EV_FREQUENT_CHECK;
1212 2328
1213 ev_stop (EV_A_ (W)w); 2329 ev_stop (EV_A_ (W)w);
1214} 2330}
1215 2331
1216void 2332void noinline
1217ev_idle_start (EV_P_ struct ev_idle *w) 2333ev_periodic_again (EV_P_ ev_periodic *w)
1218{ 2334{
1219 if (ev_is_active (w)) 2335 /* TODO: use adjustheap and recalculation */
1220 return;
1221
1222 ev_start (EV_A_ (W)w, ++idlecnt);
1223 array_needsize (idles, idlemax, idlecnt, );
1224 idles [idlecnt - 1] = w;
1225}
1226
1227void
1228ev_idle_stop (EV_P_ struct ev_idle *w)
1229{
1230 ev_clear_pending (EV_A_ (W)w);
1231 if (ev_is_active (w))
1232 return;
1233
1234 idles [((W)w)->active - 1] = idles [--idlecnt];
1235 ev_stop (EV_A_ (W)w); 2336 ev_periodic_stop (EV_A_ w);
2337 ev_periodic_start (EV_A_ w);
1236} 2338}
1237 2339#endif
1238void
1239ev_prepare_start (EV_P_ struct ev_prepare *w)
1240{
1241 if (ev_is_active (w))
1242 return;
1243
1244 ev_start (EV_A_ (W)w, ++preparecnt);
1245 array_needsize (prepares, preparemax, preparecnt, );
1246 prepares [preparecnt - 1] = w;
1247}
1248
1249void
1250ev_prepare_stop (EV_P_ struct ev_prepare *w)
1251{
1252 ev_clear_pending (EV_A_ (W)w);
1253 if (ev_is_active (w))
1254 return;
1255
1256 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1257 ev_stop (EV_A_ (W)w);
1258}
1259
1260void
1261ev_check_start (EV_P_ struct ev_check *w)
1262{
1263 if (ev_is_active (w))
1264 return;
1265
1266 ev_start (EV_A_ (W)w, ++checkcnt);
1267 array_needsize (checks, checkmax, checkcnt, );
1268 checks [checkcnt - 1] = w;
1269}
1270
1271void
1272ev_check_stop (EV_P_ struct ev_check *w)
1273{
1274 ev_clear_pending (EV_A_ (W)w);
1275 if (ev_is_active (w))
1276 return;
1277
1278 checks [((W)w)->active - 1] = checks [--checkcnt];
1279 ev_stop (EV_A_ (W)w);
1280}
1281 2340
1282#ifndef SA_RESTART 2341#ifndef SA_RESTART
1283# define SA_RESTART 0 2342# define SA_RESTART 0
1284#endif 2343#endif
1285 2344
1286void 2345void noinline
1287ev_signal_start (EV_P_ struct ev_signal *w) 2346ev_signal_start (EV_P_ ev_signal *w)
1288{ 2347{
1289#if EV_MULTIPLICITY 2348#if EV_MULTIPLICITY
1290 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2349 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1291#endif 2350#endif
1292 if (ev_is_active (w)) 2351 if (expect_false (ev_is_active (w)))
1293 return; 2352 return;
1294 2353
1295 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2354 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2355
2356 evpipe_init (EV_A);
2357
2358 EV_FREQUENT_CHECK;
2359
2360 {
2361#ifndef _WIN32
2362 sigset_t full, prev;
2363 sigfillset (&full);
2364 sigprocmask (SIG_SETMASK, &full, &prev);
2365#endif
2366
2367 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2368
2369#ifndef _WIN32
2370 sigprocmask (SIG_SETMASK, &prev, 0);
2371#endif
2372 }
1296 2373
1297 ev_start (EV_A_ (W)w, 1); 2374 ev_start (EV_A_ (W)w, 1);
1298 array_needsize (signals, signalmax, w->signum, signals_init);
1299 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2375 wlist_add (&signals [w->signum - 1].head, (WL)w);
1300 2376
1301 if (!w->next) 2377 if (!((WL)w)->next)
1302 { 2378 {
2379#if _WIN32
2380 signal (w->signum, ev_sighandler);
2381#else
1303 struct sigaction sa; 2382 struct sigaction sa;
1304 sa.sa_handler = sighandler; 2383 sa.sa_handler = ev_sighandler;
1305 sigfillset (&sa.sa_mask); 2384 sigfillset (&sa.sa_mask);
1306 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2385 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1307 sigaction (w->signum, &sa, 0); 2386 sigaction (w->signum, &sa, 0);
2387#endif
1308 } 2388 }
1309}
1310 2389
1311void 2390 EV_FREQUENT_CHECK;
2391}
2392
2393void noinline
1312ev_signal_stop (EV_P_ struct ev_signal *w) 2394ev_signal_stop (EV_P_ ev_signal *w)
1313{ 2395{
1314 ev_clear_pending (EV_A_ (W)w); 2396 clear_pending (EV_A_ (W)w);
1315 if (!ev_is_active (w)) 2397 if (expect_false (!ev_is_active (w)))
1316 return; 2398 return;
1317 2399
2400 EV_FREQUENT_CHECK;
2401
1318 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2402 wlist_del (&signals [w->signum - 1].head, (WL)w);
1319 ev_stop (EV_A_ (W)w); 2403 ev_stop (EV_A_ (W)w);
1320 2404
1321 if (!signals [w->signum - 1].head) 2405 if (!signals [w->signum - 1].head)
1322 signal (w->signum, SIG_DFL); 2406 signal (w->signum, SIG_DFL);
1323}
1324 2407
2408 EV_FREQUENT_CHECK;
2409}
2410
1325void 2411void
1326ev_child_start (EV_P_ struct ev_child *w) 2412ev_child_start (EV_P_ ev_child *w)
1327{ 2413{
1328#if EV_MULTIPLICITY 2414#if EV_MULTIPLICITY
1329 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2415 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1330#endif 2416#endif
1331 if (ev_is_active (w)) 2417 if (expect_false (ev_is_active (w)))
1332 return; 2418 return;
1333 2419
2420 EV_FREQUENT_CHECK;
2421
1334 ev_start (EV_A_ (W)w, 1); 2422 ev_start (EV_A_ (W)w, 1);
1335 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2423 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1336}
1337 2424
2425 EV_FREQUENT_CHECK;
2426}
2427
1338void 2428void
1339ev_child_stop (EV_P_ struct ev_child *w) 2429ev_child_stop (EV_P_ ev_child *w)
1340{ 2430{
1341 ev_clear_pending (EV_A_ (W)w); 2431 clear_pending (EV_A_ (W)w);
1342 if (ev_is_active (w)) 2432 if (expect_false (!ev_is_active (w)))
1343 return; 2433 return;
1344 2434
2435 EV_FREQUENT_CHECK;
2436
1345 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2437 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1346 ev_stop (EV_A_ (W)w); 2438 ev_stop (EV_A_ (W)w);
2439
2440 EV_FREQUENT_CHECK;
1347} 2441}
2442
2443#if EV_STAT_ENABLE
2444
2445# ifdef _WIN32
2446# undef lstat
2447# define lstat(a,b) _stati64 (a,b)
2448# endif
2449
2450#define DEF_STAT_INTERVAL 5.0074891
2451#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2452#define MIN_STAT_INTERVAL 0.1074891
2453
2454static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2455
2456#if EV_USE_INOTIFY
2457# define EV_INOTIFY_BUFSIZE 8192
2458
2459static void noinline
2460infy_add (EV_P_ ev_stat *w)
2461{
2462 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);
2463
2464 if (w->wd < 0)
2465 {
2466 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2467 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2468
2469 /* monitor some parent directory for speedup hints */
2470 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2471 /* but an efficiency issue only */
2472 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2473 {
2474 char path [4096];
2475 strcpy (path, w->path);
2476
2477 do
2478 {
2479 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2480 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2481
2482 char *pend = strrchr (path, '/');
2483
2484 if (!pend || pend == path)
2485 break;
2486
2487 *pend = 0;
2488 w->wd = inotify_add_watch (fs_fd, path, mask);
2489 }
2490 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2491 }
2492 }
2493
2494 if (w->wd >= 0)
2495 {
2496 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2497
2498 /* now local changes will be tracked by inotify, but remote changes won't */
2499 /* unless the filesystem it known to be local, we therefore still poll */
2500 /* also do poll on <2.6.25, but with normal frequency */
2501 struct statfs sfs;
2502
2503 if (fs_2625 && !statfs (w->path, &sfs))
2504 if (sfs.f_type == 0x1373 /* devfs */
2505 || sfs.f_type == 0xEF53 /* ext2/3 */
2506 || sfs.f_type == 0x3153464a /* jfs */
2507 || sfs.f_type == 0x52654973 /* reiser3 */
2508 || sfs.f_type == 0x01021994 /* tempfs */
2509 || sfs.f_type == 0x58465342 /* xfs */)
2510 return;
2511
2512 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2513 ev_timer_again (EV_A_ &w->timer);
2514 }
2515}
2516
2517static void noinline
2518infy_del (EV_P_ ev_stat *w)
2519{
2520 int slot;
2521 int wd = w->wd;
2522
2523 if (wd < 0)
2524 return;
2525
2526 w->wd = -2;
2527 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2528 wlist_del (&fs_hash [slot].head, (WL)w);
2529
2530 /* remove this watcher, if others are watching it, they will rearm */
2531 inotify_rm_watch (fs_fd, wd);
2532}
2533
2534static void noinline
2535infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2536{
2537 if (slot < 0)
2538 /* overflow, need to check for all hash slots */
2539 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2540 infy_wd (EV_A_ slot, wd, ev);
2541 else
2542 {
2543 WL w_;
2544
2545 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2546 {
2547 ev_stat *w = (ev_stat *)w_;
2548 w_ = w_->next; /* lets us remove this watcher and all before it */
2549
2550 if (w->wd == wd || wd == -1)
2551 {
2552 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2553 {
2554 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2555 w->wd = -1;
2556 infy_add (EV_A_ w); /* re-add, no matter what */
2557 }
2558
2559 stat_timer_cb (EV_A_ &w->timer, 0);
2560 }
2561 }
2562 }
2563}
2564
2565static void
2566infy_cb (EV_P_ ev_io *w, int revents)
2567{
2568 char buf [EV_INOTIFY_BUFSIZE];
2569 struct inotify_event *ev = (struct inotify_event *)buf;
2570 int ofs;
2571 int len = read (fs_fd, buf, sizeof (buf));
2572
2573 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2574 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2575}
2576
2577void inline_size
2578check_2625 (EV_P)
2579{
2580 /* kernels < 2.6.25 are borked
2581 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2582 */
2583 struct utsname buf;
2584 int major, minor, micro;
2585
2586 if (uname (&buf))
2587 return;
2588
2589 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2590 return;
2591
2592 if (major < 2
2593 || (major == 2 && minor < 6)
2594 || (major == 2 && minor == 6 && micro < 25))
2595 return;
2596
2597 fs_2625 = 1;
2598}
2599
2600void inline_size
2601infy_init (EV_P)
2602{
2603 if (fs_fd != -2)
2604 return;
2605
2606 fs_fd = -1;
2607
2608 check_2625 (EV_A);
2609
2610 fs_fd = inotify_init ();
2611
2612 if (fs_fd >= 0)
2613 {
2614 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2615 ev_set_priority (&fs_w, EV_MAXPRI);
2616 ev_io_start (EV_A_ &fs_w);
2617 }
2618}
2619
2620void inline_size
2621infy_fork (EV_P)
2622{
2623 int slot;
2624
2625 if (fs_fd < 0)
2626 return;
2627
2628 close (fs_fd);
2629 fs_fd = inotify_init ();
2630
2631 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2632 {
2633 WL w_ = fs_hash [slot].head;
2634 fs_hash [slot].head = 0;
2635
2636 while (w_)
2637 {
2638 ev_stat *w = (ev_stat *)w_;
2639 w_ = w_->next; /* lets us add this watcher */
2640
2641 w->wd = -1;
2642
2643 if (fs_fd >= 0)
2644 infy_add (EV_A_ w); /* re-add, no matter what */
2645 else
2646 ev_timer_again (EV_A_ &w->timer);
2647 }
2648 }
2649}
2650
2651#endif
2652
2653#ifdef _WIN32
2654# define EV_LSTAT(p,b) _stati64 (p, b)
2655#else
2656# define EV_LSTAT(p,b) lstat (p, b)
2657#endif
2658
2659void
2660ev_stat_stat (EV_P_ ev_stat *w)
2661{
2662 if (lstat (w->path, &w->attr) < 0)
2663 w->attr.st_nlink = 0;
2664 else if (!w->attr.st_nlink)
2665 w->attr.st_nlink = 1;
2666}
2667
2668static void noinline
2669stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2670{
2671 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2672
2673 /* we copy this here each the time so that */
2674 /* prev has the old value when the callback gets invoked */
2675 w->prev = w->attr;
2676 ev_stat_stat (EV_A_ w);
2677
2678 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2679 if (
2680 w->prev.st_dev != w->attr.st_dev
2681 || w->prev.st_ino != w->attr.st_ino
2682 || w->prev.st_mode != w->attr.st_mode
2683 || w->prev.st_nlink != w->attr.st_nlink
2684 || w->prev.st_uid != w->attr.st_uid
2685 || w->prev.st_gid != w->attr.st_gid
2686 || w->prev.st_rdev != w->attr.st_rdev
2687 || w->prev.st_size != w->attr.st_size
2688 || w->prev.st_atime != w->attr.st_atime
2689 || w->prev.st_mtime != w->attr.st_mtime
2690 || w->prev.st_ctime != w->attr.st_ctime
2691 ) {
2692 #if EV_USE_INOTIFY
2693 if (fs_fd >= 0)
2694 {
2695 infy_del (EV_A_ w);
2696 infy_add (EV_A_ w);
2697 ev_stat_stat (EV_A_ w); /* avoid race... */
2698 }
2699 #endif
2700
2701 ev_feed_event (EV_A_ w, EV_STAT);
2702 }
2703}
2704
2705void
2706ev_stat_start (EV_P_ ev_stat *w)
2707{
2708 if (expect_false (ev_is_active (w)))
2709 return;
2710
2711 ev_stat_stat (EV_A_ w);
2712
2713 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2714 w->interval = MIN_STAT_INTERVAL;
2715
2716 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2717 ev_set_priority (&w->timer, ev_priority (w));
2718
2719#if EV_USE_INOTIFY
2720 infy_init (EV_A);
2721
2722 if (fs_fd >= 0)
2723 infy_add (EV_A_ w);
2724 else
2725#endif
2726 ev_timer_again (EV_A_ &w->timer);
2727
2728 ev_start (EV_A_ (W)w, 1);
2729
2730 EV_FREQUENT_CHECK;
2731}
2732
2733void
2734ev_stat_stop (EV_P_ ev_stat *w)
2735{
2736 clear_pending (EV_A_ (W)w);
2737 if (expect_false (!ev_is_active (w)))
2738 return;
2739
2740 EV_FREQUENT_CHECK;
2741
2742#if EV_USE_INOTIFY
2743 infy_del (EV_A_ w);
2744#endif
2745 ev_timer_stop (EV_A_ &w->timer);
2746
2747 ev_stop (EV_A_ (W)w);
2748
2749 EV_FREQUENT_CHECK;
2750}
2751#endif
2752
2753#if EV_IDLE_ENABLE
2754void
2755ev_idle_start (EV_P_ ev_idle *w)
2756{
2757 if (expect_false (ev_is_active (w)))
2758 return;
2759
2760 pri_adjust (EV_A_ (W)w);
2761
2762 EV_FREQUENT_CHECK;
2763
2764 {
2765 int active = ++idlecnt [ABSPRI (w)];
2766
2767 ++idleall;
2768 ev_start (EV_A_ (W)w, active);
2769
2770 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2771 idles [ABSPRI (w)][active - 1] = w;
2772 }
2773
2774 EV_FREQUENT_CHECK;
2775}
2776
2777void
2778ev_idle_stop (EV_P_ ev_idle *w)
2779{
2780 clear_pending (EV_A_ (W)w);
2781 if (expect_false (!ev_is_active (w)))
2782 return;
2783
2784 EV_FREQUENT_CHECK;
2785
2786 {
2787 int active = ev_active (w);
2788
2789 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2790 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2791
2792 ev_stop (EV_A_ (W)w);
2793 --idleall;
2794 }
2795
2796 EV_FREQUENT_CHECK;
2797}
2798#endif
2799
2800void
2801ev_prepare_start (EV_P_ ev_prepare *w)
2802{
2803 if (expect_false (ev_is_active (w)))
2804 return;
2805
2806 EV_FREQUENT_CHECK;
2807
2808 ev_start (EV_A_ (W)w, ++preparecnt);
2809 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2810 prepares [preparecnt - 1] = w;
2811
2812 EV_FREQUENT_CHECK;
2813}
2814
2815void
2816ev_prepare_stop (EV_P_ ev_prepare *w)
2817{
2818 clear_pending (EV_A_ (W)w);
2819 if (expect_false (!ev_is_active (w)))
2820 return;
2821
2822 EV_FREQUENT_CHECK;
2823
2824 {
2825 int active = ev_active (w);
2826
2827 prepares [active - 1] = prepares [--preparecnt];
2828 ev_active (prepares [active - 1]) = active;
2829 }
2830
2831 ev_stop (EV_A_ (W)w);
2832
2833 EV_FREQUENT_CHECK;
2834}
2835
2836void
2837ev_check_start (EV_P_ ev_check *w)
2838{
2839 if (expect_false (ev_is_active (w)))
2840 return;
2841
2842 EV_FREQUENT_CHECK;
2843
2844 ev_start (EV_A_ (W)w, ++checkcnt);
2845 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2846 checks [checkcnt - 1] = w;
2847
2848 EV_FREQUENT_CHECK;
2849}
2850
2851void
2852ev_check_stop (EV_P_ ev_check *w)
2853{
2854 clear_pending (EV_A_ (W)w);
2855 if (expect_false (!ev_is_active (w)))
2856 return;
2857
2858 EV_FREQUENT_CHECK;
2859
2860 {
2861 int active = ev_active (w);
2862
2863 checks [active - 1] = checks [--checkcnt];
2864 ev_active (checks [active - 1]) = active;
2865 }
2866
2867 ev_stop (EV_A_ (W)w);
2868
2869 EV_FREQUENT_CHECK;
2870}
2871
2872#if EV_EMBED_ENABLE
2873void noinline
2874ev_embed_sweep (EV_P_ ev_embed *w)
2875{
2876 ev_loop (w->other, EVLOOP_NONBLOCK);
2877}
2878
2879static void
2880embed_io_cb (EV_P_ ev_io *io, int revents)
2881{
2882 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2883
2884 if (ev_cb (w))
2885 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2886 else
2887 ev_loop (w->other, EVLOOP_NONBLOCK);
2888}
2889
2890static void
2891embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2892{
2893 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2894
2895 {
2896 struct ev_loop *loop = w->other;
2897
2898 while (fdchangecnt)
2899 {
2900 fd_reify (EV_A);
2901 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2902 }
2903 }
2904}
2905
2906static void
2907embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2908{
2909 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2910
2911 ev_embed_stop (EV_A_ w);
2912
2913 {
2914 struct ev_loop *loop = w->other;
2915
2916 ev_loop_fork (EV_A);
2917 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2918 }
2919
2920 ev_embed_start (EV_A_ w);
2921}
2922
2923#if 0
2924static void
2925embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2926{
2927 ev_idle_stop (EV_A_ idle);
2928}
2929#endif
2930
2931void
2932ev_embed_start (EV_P_ ev_embed *w)
2933{
2934 if (expect_false (ev_is_active (w)))
2935 return;
2936
2937 {
2938 struct ev_loop *loop = w->other;
2939 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2940 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2941 }
2942
2943 EV_FREQUENT_CHECK;
2944
2945 ev_set_priority (&w->io, ev_priority (w));
2946 ev_io_start (EV_A_ &w->io);
2947
2948 ev_prepare_init (&w->prepare, embed_prepare_cb);
2949 ev_set_priority (&w->prepare, EV_MINPRI);
2950 ev_prepare_start (EV_A_ &w->prepare);
2951
2952 ev_fork_init (&w->fork, embed_fork_cb);
2953 ev_fork_start (EV_A_ &w->fork);
2954
2955 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2956
2957 ev_start (EV_A_ (W)w, 1);
2958
2959 EV_FREQUENT_CHECK;
2960}
2961
2962void
2963ev_embed_stop (EV_P_ ev_embed *w)
2964{
2965 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w)))
2967 return;
2968
2969 EV_FREQUENT_CHECK;
2970
2971 ev_io_stop (EV_A_ &w->io);
2972 ev_prepare_stop (EV_A_ &w->prepare);
2973 ev_fork_stop (EV_A_ &w->fork);
2974
2975 EV_FREQUENT_CHECK;
2976}
2977#endif
2978
2979#if EV_FORK_ENABLE
2980void
2981ev_fork_start (EV_P_ ev_fork *w)
2982{
2983 if (expect_false (ev_is_active (w)))
2984 return;
2985
2986 EV_FREQUENT_CHECK;
2987
2988 ev_start (EV_A_ (W)w, ++forkcnt);
2989 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2990 forks [forkcnt - 1] = w;
2991
2992 EV_FREQUENT_CHECK;
2993}
2994
2995void
2996ev_fork_stop (EV_P_ ev_fork *w)
2997{
2998 clear_pending (EV_A_ (W)w);
2999 if (expect_false (!ev_is_active (w)))
3000 return;
3001
3002 EV_FREQUENT_CHECK;
3003
3004 {
3005 int active = ev_active (w);
3006
3007 forks [active - 1] = forks [--forkcnt];
3008 ev_active (forks [active - 1]) = active;
3009 }
3010
3011 ev_stop (EV_A_ (W)w);
3012
3013 EV_FREQUENT_CHECK;
3014}
3015#endif
3016
3017#if EV_ASYNC_ENABLE
3018void
3019ev_async_start (EV_P_ ev_async *w)
3020{
3021 if (expect_false (ev_is_active (w)))
3022 return;
3023
3024 evpipe_init (EV_A);
3025
3026 EV_FREQUENT_CHECK;
3027
3028 ev_start (EV_A_ (W)w, ++asynccnt);
3029 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3030 asyncs [asynccnt - 1] = w;
3031
3032 EV_FREQUENT_CHECK;
3033}
3034
3035void
3036ev_async_stop (EV_P_ ev_async *w)
3037{
3038 clear_pending (EV_A_ (W)w);
3039 if (expect_false (!ev_is_active (w)))
3040 return;
3041
3042 EV_FREQUENT_CHECK;
3043
3044 {
3045 int active = ev_active (w);
3046
3047 asyncs [active - 1] = asyncs [--asynccnt];
3048 ev_active (asyncs [active - 1]) = active;
3049 }
3050
3051 ev_stop (EV_A_ (W)w);
3052
3053 EV_FREQUENT_CHECK;
3054}
3055
3056void
3057ev_async_send (EV_P_ ev_async *w)
3058{
3059 w->sent = 1;
3060 evpipe_write (EV_A_ &gotasync);
3061}
3062#endif
1348 3063
1349/*****************************************************************************/ 3064/*****************************************************************************/
1350 3065
1351struct ev_once 3066struct ev_once
1352{ 3067{
1353 struct ev_io io; 3068 ev_io io;
1354 struct ev_timer to; 3069 ev_timer to;
1355 void (*cb)(int revents, void *arg); 3070 void (*cb)(int revents, void *arg);
1356 void *arg; 3071 void *arg;
1357}; 3072};
1358 3073
1359static void 3074static void
1360once_cb (EV_P_ struct ev_once *once, int revents) 3075once_cb (EV_P_ struct ev_once *once, int revents)
1361{ 3076{
1362 void (*cb)(int revents, void *arg) = once->cb; 3077 void (*cb)(int revents, void *arg) = once->cb;
1363 void *arg = once->arg; 3078 void *arg = once->arg;
1364 3079
1365 ev_io_stop (EV_A_ &once->io); 3080 ev_io_stop (EV_A_ &once->io);
1366 ev_timer_stop (EV_A_ &once->to); 3081 ev_timer_stop (EV_A_ &once->to);
1367 free (once); 3082 ev_free (once);
1368 3083
1369 cb (revents, arg); 3084 cb (revents, arg);
1370} 3085}
1371 3086
1372static void 3087static void
1373once_cb_io (EV_P_ struct ev_io *w, int revents) 3088once_cb_io (EV_P_ ev_io *w, int revents)
1374{ 3089{
1375 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3090 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3091
3092 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1376} 3093}
1377 3094
1378static void 3095static void
1379once_cb_to (EV_P_ struct ev_timer *w, int revents) 3096once_cb_to (EV_P_ ev_timer *w, int revents)
1380{ 3097{
1381 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3098 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3099
3100 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1382} 3101}
1383 3102
1384void 3103void
1385ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3104ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1386{ 3105{
1387 struct ev_once *once = malloc (sizeof (struct ev_once)); 3106 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1388 3107
1389 if (!once) 3108 if (expect_false (!once))
3109 {
1390 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3110 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1391 else 3111 return;
1392 { 3112 }
3113
1393 once->cb = cb; 3114 once->cb = cb;
1394 once->arg = arg; 3115 once->arg = arg;
1395 3116
1396 ev_watcher_init (&once->io, once_cb_io); 3117 ev_init (&once->io, once_cb_io);
1397 if (fd >= 0) 3118 if (fd >= 0)
1398 { 3119 {
1399 ev_io_set (&once->io, fd, events); 3120 ev_io_set (&once->io, fd, events);
1400 ev_io_start (EV_A_ &once->io); 3121 ev_io_start (EV_A_ &once->io);
1401 } 3122 }
1402 3123
1403 ev_watcher_init (&once->to, once_cb_to); 3124 ev_init (&once->to, once_cb_to);
1404 if (timeout >= 0.) 3125 if (timeout >= 0.)
1405 { 3126 {
1406 ev_timer_set (&once->to, timeout, 0.); 3127 ev_timer_set (&once->to, timeout, 0.);
1407 ev_timer_start (EV_A_ &once->to); 3128 ev_timer_start (EV_A_ &once->to);
1408 }
1409 } 3129 }
1410} 3130}
1411 3131
3132#if EV_MULTIPLICITY
3133 #include "ev_wrap.h"
3134#endif
3135
3136#ifdef __cplusplus
3137}
3138#endif
3139

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