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Comparing libev/ev.c (file contents):
Revision 1.99 by root, Sun Nov 11 02:26:47 2007 UTC vs.
Revision 1.251 by root, Thu May 22 03:42:34 2008 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 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
38 51
39# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 53# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
42# endif 55# endif
43# ifndef EV_USE_REALTIME 56# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
45# endif 58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
46# endif 66# endif
47 67
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
50# endif 74# endif
51 75
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
53# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
54# endif 82# endif
55 83
56# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
57# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
58# endif 90# endif
59 91
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
62# endif 98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
63 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
64#endif 132#endif
65 133
66#include <math.h> 134#include <math.h>
67#include <stdlib.h> 135#include <stdlib.h>
68#include <fcntl.h> 136#include <fcntl.h>
… …
75#include <sys/types.h> 143#include <sys/types.h>
76#include <time.h> 144#include <time.h>
77 145
78#include <signal.h> 146#include <signal.h>
79 147
80#ifndef WIN32
81# include <unistd.h>
82# include <sys/time.h>
83# include <sys/wait.h>
84#endif
85/**/
86
87#ifndef EV_USE_MONOTONIC
88# define EV_USE_MONOTONIC 1
89#endif
90
91#ifndef EV_USE_SELECT
92# define EV_USE_SELECT 1
93#endif
94
95#ifndef EV_USE_POLL
96# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
97#endif
98
99#ifndef EV_USE_EPOLL
100# define EV_USE_EPOLL 0
101#endif
102
103#ifndef EV_USE_KQUEUE
104# define EV_USE_KQUEUE 0
105#endif
106
107#ifndef EV_USE_WIN32
108# ifdef WIN32
109# define EV_USE_WIN32 0 /* it does not exist, use select */
110# undef EV_USE_SELECT
111# define EV_USE_SELECT 1
112# else
113# define EV_USE_WIN32 0
114# endif
115#endif
116
117#ifndef EV_USE_REALTIME
118# define EV_USE_REALTIME 1
119#endif
120
121/**/
122
123#ifndef CLOCK_MONOTONIC
124# undef EV_USE_MONOTONIC
125# define EV_USE_MONOTONIC 0
126#endif
127
128#ifndef CLOCK_REALTIME
129# undef EV_USE_REALTIME
130# define EV_USE_REALTIME 0
131#endif
132
133/**/
134
135#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
136#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
137#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
138/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
139
140#ifdef EV_H 148#ifdef EV_H
141# include EV_H 149# include EV_H
142#else 150#else
143# include "ev.h" 151# include "ev.h"
144#endif 152#endif
145 153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
163# endif
164#endif
165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
167
168#ifndef EV_USE_MONOTONIC
169# define EV_USE_MONOTONIC 0
170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
178#endif
179
180#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1
182#endif
183
184#ifndef EV_USE_POLL
185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
189# endif
190#endif
191
192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
196# define EV_USE_EPOLL 0
197# endif
198#endif
199
200#ifndef EV_USE_KQUEUE
201# define EV_USE_KQUEUE 0
202#endif
203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240#if 0 /* debugging */
241# define EV_VERIFY 3
242# define EV_USE_4HEAP 1
243# define EV_HEAP_CACHE_AT 1
244#endif
245
246#ifndef EV_VERIFY
247# define EV_VERIFY !EV_MINIMAL
248#endif
249
250#ifndef EV_USE_4HEAP
251# define EV_USE_4HEAP !EV_MINIMAL
252#endif
253
254#ifndef EV_HEAP_CACHE_AT
255# define EV_HEAP_CACHE_AT !EV_MINIMAL
256#endif
257
258/* this block fixes any misconfiguration where we know we run into trouble otherwise */
259
260#ifndef CLOCK_MONOTONIC
261# undef EV_USE_MONOTONIC
262# define EV_USE_MONOTONIC 0
263#endif
264
265#ifndef CLOCK_REALTIME
266# undef EV_USE_REALTIME
267# define EV_USE_REALTIME 0
268#endif
269
270#if !EV_STAT_ENABLE
271# undef EV_USE_INOTIFY
272# define EV_USE_INOTIFY 0
273#endif
274
275#if !EV_USE_NANOSLEEP
276# ifndef _WIN32
277# include <sys/select.h>
278# endif
279#endif
280
281#if EV_USE_INOTIFY
282# include <sys/inotify.h>
283#endif
284
285#if EV_SELECT_IS_WINSOCKET
286# include <winsock.h>
287#endif
288
289#if EV_USE_EVENTFD
290/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
291# include <stdint.h>
292# ifdef __cplusplus
293extern "C" {
294# endif
295int eventfd (unsigned int initval, int flags);
296# ifdef __cplusplus
297}
298# endif
299#endif
300
301/**/
302
303#if EV_VERIFY >= 3
304# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
305#else
306# define EV_FREQUENT_CHECK do { } while (0)
307#endif
308
309/*
310 * This is used to avoid floating point rounding problems.
311 * It is added to ev_rt_now when scheduling periodics
312 * to ensure progress, time-wise, even when rounding
313 * errors are against us.
314 * This value is good at least till the year 4000.
315 * Better solutions welcome.
316 */
317#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
318
319#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
320#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
321/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
322
146#if __GNUC__ >= 3 323#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 324# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 325# define noinline __attribute__ ((noinline))
149#else 326#else
150# define expect(expr,value) (expr) 327# define expect(expr,value) (expr)
151# define inline static 328# define noinline
329# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
330# define inline
331# endif
152#endif 332#endif
153 333
154#define expect_false(expr) expect ((expr) != 0, 0) 334#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 335#define expect_true(expr) expect ((expr) != 0, 1)
336#define inline_size static inline
337
338#if EV_MINIMAL
339# define inline_speed static noinline
340#else
341# define inline_speed static inline
342#endif
156 343
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 344#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 345#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
159 346
347#define EMPTY /* required for microsofts broken pseudo-c compiler */
348#define EMPTY2(a,b) /* used to suppress some warnings */
349
160typedef struct ev_watcher *W; 350typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 351typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 352typedef ev_watcher_time *WT;
163 353
354#define ev_active(w) ((W)(w))->active
355#define ev_at(w) ((WT)(w))->at
356
357#if EV_USE_MONOTONIC
358/* sig_atomic_t is used to avoid per-thread variables or locking but still */
359/* giving it a reasonably high chance of working on typical architetcures */
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 360static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
361#endif
165 362
166#ifdef WIN32 363#ifdef _WIN32
167# include "ev_win32.c" 364# include "ev_win32.c"
168#endif 365#endif
169 366
170/*****************************************************************************/ 367/*****************************************************************************/
171 368
172static void (*syserr_cb)(const char *msg); 369static void (*syserr_cb)(const char *msg);
173 370
371void
174void ev_set_syserr_cb (void (*cb)(const char *msg)) 372ev_set_syserr_cb (void (*cb)(const char *msg))
175{ 373{
176 syserr_cb = cb; 374 syserr_cb = cb;
177} 375}
178 376
179static void 377static void noinline
180syserr (const char *msg) 378syserr (const char *msg)
181{ 379{
182 if (!msg) 380 if (!msg)
183 msg = "(libev) system error"; 381 msg = "(libev) system error";
184 382
… …
189 perror (msg); 387 perror (msg);
190 abort (); 388 abort ();
191 } 389 }
192} 390}
193 391
392static void *
393ev_realloc_emul (void *ptr, long size)
394{
395 /* some systems, notably openbsd and darwin, fail to properly
396 * implement realloc (x, 0) (as required by both ansi c-98 and
397 * the single unix specification, so work around them here.
398 */
399
400 if (size)
401 return realloc (ptr, size);
402
403 free (ptr);
404 return 0;
405}
406
194static void *(*alloc)(void *ptr, long size); 407static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195 408
409void
196void ev_set_allocator (void *(*cb)(void *ptr, long size)) 410ev_set_allocator (void *(*cb)(void *ptr, long size))
197{ 411{
198 alloc = cb; 412 alloc = cb;
199} 413}
200 414
201static void * 415inline_speed void *
202ev_realloc (void *ptr, long size) 416ev_realloc (void *ptr, long size)
203{ 417{
204 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 418 ptr = alloc (ptr, size);
205 419
206 if (!ptr && size) 420 if (!ptr && size)
207 { 421 {
208 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 422 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
209 abort (); 423 abort ();
… …
220typedef struct 434typedef struct
221{ 435{
222 WL head; 436 WL head;
223 unsigned char events; 437 unsigned char events;
224 unsigned char reify; 438 unsigned char reify;
439#if EV_SELECT_IS_WINSOCKET
440 SOCKET handle;
441#endif
225} ANFD; 442} ANFD;
226 443
227typedef struct 444typedef struct
228{ 445{
229 W w; 446 W w;
230 int events; 447 int events;
231} ANPENDING; 448} ANPENDING;
449
450#if EV_USE_INOTIFY
451/* hash table entry per inotify-id */
452typedef struct
453{
454 WL head;
455} ANFS;
456#endif
457
458/* Heap Entry */
459#if EV_HEAP_CACHE_AT
460 typedef struct {
461 ev_tstamp at;
462 WT w;
463 } ANHE;
464
465 #define ANHE_w(he) (he).w /* access watcher, read-write */
466 #define ANHE_at(he) (he).at /* access cached at, read-only */
467 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
468#else
469 typedef WT ANHE;
470
471 #define ANHE_w(he) (he)
472 #define ANHE_at(he) (he)->at
473 #define ANHE_at_cache(he)
474#endif
232 475
233#if EV_MULTIPLICITY 476#if EV_MULTIPLICITY
234 477
235 struct ev_loop 478 struct ev_loop
236 { 479 {
… …
240 #include "ev_vars.h" 483 #include "ev_vars.h"
241 #undef VAR 484 #undef VAR
242 }; 485 };
243 #include "ev_wrap.h" 486 #include "ev_wrap.h"
244 487
245 struct ev_loop default_loop_struct; 488 static struct ev_loop default_loop_struct;
246 static struct ev_loop *default_loop; 489 struct ev_loop *ev_default_loop_ptr;
247 490
248#else 491#else
249 492
250 ev_tstamp ev_rt_now; 493 ev_tstamp ev_rt_now;
251 #define VAR(name,decl) static decl; 494 #define VAR(name,decl) static decl;
252 #include "ev_vars.h" 495 #include "ev_vars.h"
253 #undef VAR 496 #undef VAR
254 497
255 static int default_loop; 498 static int ev_default_loop_ptr;
256 499
257#endif 500#endif
258 501
259/*****************************************************************************/ 502/*****************************************************************************/
260 503
… …
270 gettimeofday (&tv, 0); 513 gettimeofday (&tv, 0);
271 return tv.tv_sec + tv.tv_usec * 1e-6; 514 return tv.tv_sec + tv.tv_usec * 1e-6;
272#endif 515#endif
273} 516}
274 517
275inline ev_tstamp 518ev_tstamp inline_size
276get_clock (void) 519get_clock (void)
277{ 520{
278#if EV_USE_MONOTONIC 521#if EV_USE_MONOTONIC
279 if (expect_true (have_monotonic)) 522 if (expect_true (have_monotonic))
280 { 523 {
… …
293{ 536{
294 return ev_rt_now; 537 return ev_rt_now;
295} 538}
296#endif 539#endif
297 540
298#define array_roundsize(type,n) ((n) | 4 & ~3) 541void
542ev_sleep (ev_tstamp delay)
543{
544 if (delay > 0.)
545 {
546#if EV_USE_NANOSLEEP
547 struct timespec ts;
548
549 ts.tv_sec = (time_t)delay;
550 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
551
552 nanosleep (&ts, 0);
553#elif defined(_WIN32)
554 Sleep ((unsigned long)(delay * 1e3));
555#else
556 struct timeval tv;
557
558 tv.tv_sec = (time_t)delay;
559 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
560
561 select (0, 0, 0, 0, &tv);
562#endif
563 }
564}
565
566/*****************************************************************************/
567
568#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
569
570int inline_size
571array_nextsize (int elem, int cur, int cnt)
572{
573 int ncur = cur + 1;
574
575 do
576 ncur <<= 1;
577 while (cnt > ncur);
578
579 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
580 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
581 {
582 ncur *= elem;
583 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
584 ncur = ncur - sizeof (void *) * 4;
585 ncur /= elem;
586 }
587
588 return ncur;
589}
590
591static noinline void *
592array_realloc (int elem, void *base, int *cur, int cnt)
593{
594 *cur = array_nextsize (elem, *cur, cnt);
595 return ev_realloc (base, elem * *cur);
596}
299 597
300#define array_needsize(type,base,cur,cnt,init) \ 598#define array_needsize(type,base,cur,cnt,init) \
301 if (expect_false ((cnt) > cur)) \ 599 if (expect_false ((cnt) > (cur))) \
302 { \ 600 { \
303 int newcnt = cur; \ 601 int ocur_ = (cur); \
304 do \ 602 (base) = (type *)array_realloc \
305 { \ 603 (sizeof (type), (base), &(cur), (cnt)); \
306 newcnt = array_roundsize (type, newcnt << 1); \ 604 init ((base) + (ocur_), (cur) - ocur_); \
307 } \
308 while ((cnt) > newcnt); \
309 \
310 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
311 init (base + cur, newcnt - cur); \
312 cur = newcnt; \
313 } 605 }
314 606
607#if 0
315#define array_slim(type,stem) \ 608#define array_slim(type,stem) \
316 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 609 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
317 { \ 610 { \
318 stem ## max = array_roundsize (stem ## cnt >> 1); \ 611 stem ## max = array_roundsize (stem ## cnt >> 1); \
319 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 612 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
320 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 613 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
321 } 614 }
322 615#endif
323/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
324/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
325#define array_free_microshit(stem) \
326 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
327 616
328#define array_free(stem, idx) \ 617#define array_free(stem, idx) \
329 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 618 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
330 619
331/*****************************************************************************/ 620/*****************************************************************************/
332 621
333static void 622void noinline
623ev_feed_event (EV_P_ void *w, int revents)
624{
625 W w_ = (W)w;
626 int pri = ABSPRI (w_);
627
628 if (expect_false (w_->pending))
629 pendings [pri][w_->pending - 1].events |= revents;
630 else
631 {
632 w_->pending = ++pendingcnt [pri];
633 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
634 pendings [pri][w_->pending - 1].w = w_;
635 pendings [pri][w_->pending - 1].events = revents;
636 }
637}
638
639void inline_speed
640queue_events (EV_P_ W *events, int eventcnt, int type)
641{
642 int i;
643
644 for (i = 0; i < eventcnt; ++i)
645 ev_feed_event (EV_A_ events [i], type);
646}
647
648/*****************************************************************************/
649
650void inline_size
334anfds_init (ANFD *base, int count) 651anfds_init (ANFD *base, int count)
335{ 652{
336 while (count--) 653 while (count--)
337 { 654 {
338 base->head = 0; 655 base->head = 0;
… …
341 658
342 ++base; 659 ++base;
343 } 660 }
344} 661}
345 662
346void 663void inline_speed
347ev_feed_event (EV_P_ void *w, int revents)
348{
349 W w_ = (W)w;
350
351 if (w_->pending)
352 {
353 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
354 return;
355 }
356
357 w_->pending = ++pendingcnt [ABSPRI (w_)];
358 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
359 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
360 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
361}
362
363static void
364queue_events (EV_P_ W *events, int eventcnt, int type)
365{
366 int i;
367
368 for (i = 0; i < eventcnt; ++i)
369 ev_feed_event (EV_A_ events [i], type);
370}
371
372inline void
373fd_event (EV_P_ int fd, int revents) 664fd_event (EV_P_ int fd, int revents)
374{ 665{
375 ANFD *anfd = anfds + fd; 666 ANFD *anfd = anfds + fd;
376 struct ev_io *w; 667 ev_io *w;
377 668
378 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 669 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
379 { 670 {
380 int ev = w->events & revents; 671 int ev = w->events & revents;
381 672
382 if (ev) 673 if (ev)
383 ev_feed_event (EV_A_ (W)w, ev); 674 ev_feed_event (EV_A_ (W)w, ev);
… …
385} 676}
386 677
387void 678void
388ev_feed_fd_event (EV_P_ int fd, int revents) 679ev_feed_fd_event (EV_P_ int fd, int revents)
389{ 680{
681 if (fd >= 0 && fd < anfdmax)
390 fd_event (EV_A_ fd, revents); 682 fd_event (EV_A_ fd, revents);
391} 683}
392 684
393/*****************************************************************************/ 685void inline_size
394
395static void
396fd_reify (EV_P) 686fd_reify (EV_P)
397{ 687{
398 int i; 688 int i;
399 689
400 for (i = 0; i < fdchangecnt; ++i) 690 for (i = 0; i < fdchangecnt; ++i)
401 { 691 {
402 int fd = fdchanges [i]; 692 int fd = fdchanges [i];
403 ANFD *anfd = anfds + fd; 693 ANFD *anfd = anfds + fd;
404 struct ev_io *w; 694 ev_io *w;
405 695
406 int events = 0; 696 unsigned char events = 0;
407 697
408 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 698 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
409 events |= w->events; 699 events |= (unsigned char)w->events;
410 700
701#if EV_SELECT_IS_WINSOCKET
702 if (events)
703 {
704 unsigned long argp;
705 #ifdef EV_FD_TO_WIN32_HANDLE
706 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
707 #else
708 anfd->handle = _get_osfhandle (fd);
709 #endif
710 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
711 }
712#endif
713
714 {
715 unsigned char o_events = anfd->events;
716 unsigned char o_reify = anfd->reify;
717
411 anfd->reify = 0; 718 anfd->reify = 0;
412
413 method_modify (EV_A_ fd, anfd->events, events);
414 anfd->events = events; 719 anfd->events = events;
720
721 if (o_events != events || o_reify & EV_IOFDSET)
722 backend_modify (EV_A_ fd, o_events, events);
723 }
415 } 724 }
416 725
417 fdchangecnt = 0; 726 fdchangecnt = 0;
418} 727}
419 728
420static void 729void inline_size
421fd_change (EV_P_ int fd) 730fd_change (EV_P_ int fd, int flags)
422{ 731{
423 if (anfds [fd].reify) 732 unsigned char reify = anfds [fd].reify;
424 return;
425
426 anfds [fd].reify = 1; 733 anfds [fd].reify |= flags;
427 734
735 if (expect_true (!reify))
736 {
428 ++fdchangecnt; 737 ++fdchangecnt;
429 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 738 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
430 fdchanges [fdchangecnt - 1] = fd; 739 fdchanges [fdchangecnt - 1] = fd;
740 }
431} 741}
432 742
433static void 743void inline_speed
434fd_kill (EV_P_ int fd) 744fd_kill (EV_P_ int fd)
435{ 745{
436 struct ev_io *w; 746 ev_io *w;
437 747
438 while ((w = (struct ev_io *)anfds [fd].head)) 748 while ((w = (ev_io *)anfds [fd].head))
439 { 749 {
440 ev_io_stop (EV_A_ w); 750 ev_io_stop (EV_A_ w);
441 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 751 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
442 } 752 }
443} 753}
444 754
445static int 755int inline_size
446fd_valid (int fd) 756fd_valid (int fd)
447{ 757{
448#ifdef WIN32 758#ifdef _WIN32
449 return !!win32_get_osfhandle (fd); 759 return _get_osfhandle (fd) != -1;
450#else 760#else
451 return fcntl (fd, F_GETFD) != -1; 761 return fcntl (fd, F_GETFD) != -1;
452#endif 762#endif
453} 763}
454 764
455/* called on EBADF to verify fds */ 765/* called on EBADF to verify fds */
456static void 766static void noinline
457fd_ebadf (EV_P) 767fd_ebadf (EV_P)
458{ 768{
459 int fd; 769 int fd;
460 770
461 for (fd = 0; fd < anfdmax; ++fd) 771 for (fd = 0; fd < anfdmax; ++fd)
… …
463 if (!fd_valid (fd) == -1 && errno == EBADF) 773 if (!fd_valid (fd) == -1 && errno == EBADF)
464 fd_kill (EV_A_ fd); 774 fd_kill (EV_A_ fd);
465} 775}
466 776
467/* called on ENOMEM in select/poll to kill some fds and retry */ 777/* called on ENOMEM in select/poll to kill some fds and retry */
468static void 778static void noinline
469fd_enomem (EV_P) 779fd_enomem (EV_P)
470{ 780{
471 int fd; 781 int fd;
472 782
473 for (fd = anfdmax; fd--; ) 783 for (fd = anfdmax; fd--; )
… …
476 fd_kill (EV_A_ fd); 786 fd_kill (EV_A_ fd);
477 return; 787 return;
478 } 788 }
479} 789}
480 790
481/* usually called after fork if method needs to re-arm all fds from scratch */ 791/* usually called after fork if backend needs to re-arm all fds from scratch */
482static void 792static void noinline
483fd_rearm_all (EV_P) 793fd_rearm_all (EV_P)
484{ 794{
485 int fd; 795 int fd;
486 796
487 /* this should be highly optimised to not do anything but set a flag */
488 for (fd = 0; fd < anfdmax; ++fd) 797 for (fd = 0; fd < anfdmax; ++fd)
489 if (anfds [fd].events) 798 if (anfds [fd].events)
490 { 799 {
491 anfds [fd].events = 0; 800 anfds [fd].events = 0;
492 fd_change (EV_A_ fd); 801 fd_change (EV_A_ fd, EV_IOFDSET | 1);
493 } 802 }
494} 803}
495 804
496/*****************************************************************************/ 805/*****************************************************************************/
497 806
498static void 807/*
499upheap (WT *heap, int k) 808 * the heap functions want a real array index. array index 0 uis guaranteed to not
500{ 809 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
501 WT w = heap [k]; 810 * the branching factor of the d-tree.
811 */
502 812
503 while (k && heap [k >> 1]->at > w->at) 813/*
504 { 814 * at the moment we allow libev the luxury of two heaps,
505 heap [k] = heap [k >> 1]; 815 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
506 ((W)heap [k])->active = k + 1; 816 * which is more cache-efficient.
507 k >>= 1; 817 * the difference is about 5% with 50000+ watchers.
508 } 818 */
819#if EV_USE_4HEAP
509 820
510 heap [k] = w; 821#define DHEAP 4
511 ((W)heap [k])->active = k + 1; 822#define HEAP0 (DHEAP - 1) /* index of first element in heap */
823#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
824#define UPHEAP_DONE(p,k) ((p) == (k))
512 825
513} 826/* away from the root */
514 827void inline_speed
515static void
516downheap (WT *heap, int N, int k) 828downheap (ANHE *heap, int N, int k)
517{ 829{
518 WT w = heap [k]; 830 ANHE he = heap [k];
831 ANHE *E = heap + N + HEAP0;
519 832
520 while (k < (N >> 1)) 833 for (;;)
521 { 834 {
522 int j = k << 1; 835 ev_tstamp minat;
836 ANHE *minpos;
837 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
523 838
524 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 839 /* find minimum child */
840 if (expect_true (pos + DHEAP - 1 < E))
525 ++j; 841 {
526 842 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
527 if (w->at <= heap [j]->at) 843 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
844 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
845 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
846 }
847 else if (pos < E)
848 {
849 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
850 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
851 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
852 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
853 }
854 else
528 break; 855 break;
529 856
857 if (ANHE_at (he) <= minat)
858 break;
859
860 heap [k] = *minpos;
861 ev_active (ANHE_w (*minpos)) = k;
862
863 k = minpos - heap;
864 }
865
866 heap [k] = he;
867 ev_active (ANHE_w (he)) = k;
868}
869
870#else /* 4HEAP */
871
872#define HEAP0 1
873#define HPARENT(k) ((k) >> 1)
874#define UPHEAP_DONE(p,k) (!(p))
875
876/* away from the root */
877void inline_speed
878downheap (ANHE *heap, int N, int k)
879{
880 ANHE he = heap [k];
881
882 for (;;)
883 {
884 int c = k << 1;
885
886 if (c > N + HEAP0 - 1)
887 break;
888
889 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
890 ? 1 : 0;
891
892 if (ANHE_at (he) <= ANHE_at (heap [c]))
893 break;
894
530 heap [k] = heap [j]; 895 heap [k] = heap [c];
531 ((W)heap [k])->active = k + 1; 896 ev_active (ANHE_w (heap [k])) = k;
897
532 k = j; 898 k = c;
533 } 899 }
534 900
535 heap [k] = w; 901 heap [k] = he;
536 ((W)heap [k])->active = k + 1; 902 ev_active (ANHE_w (he)) = k;
537} 903}
904#endif
538 905
539inline void 906/* towards the root */
907void inline_speed
908upheap (ANHE *heap, int k)
909{
910 ANHE he = heap [k];
911
912 for (;;)
913 {
914 int p = HPARENT (k);
915
916 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
917 break;
918
919 heap [k] = heap [p];
920 ev_active (ANHE_w (heap [k])) = k;
921 k = p;
922 }
923
924 heap [k] = he;
925 ev_active (ANHE_w (he)) = k;
926}
927
928void inline_size
540adjustheap (WT *heap, int N, int k) 929adjustheap (ANHE *heap, int N, int k)
541{ 930{
931 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
542 upheap (heap, k); 932 upheap (heap, k);
933 else
543 downheap (heap, N, k); 934 downheap (heap, N, k);
935}
936
937/* rebuild the heap: this function is used only once and executed rarely */
938void inline_size
939reheap (ANHE *heap, int N)
940{
941 int i;
942
943 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
944 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
945 for (i = 0; i < N; ++i)
946 upheap (heap, i + HEAP0);
544} 947}
545 948
546/*****************************************************************************/ 949/*****************************************************************************/
547 950
548typedef struct 951typedef struct
549{ 952{
550 WL head; 953 WL head;
551 sig_atomic_t volatile gotsig; 954 EV_ATOMIC_T gotsig;
552} ANSIG; 955} ANSIG;
553 956
554static ANSIG *signals; 957static ANSIG *signals;
555static int signalmax; 958static int signalmax;
556 959
557static int sigpipe [2]; 960static EV_ATOMIC_T gotsig;
558static sig_atomic_t volatile gotsig;
559static struct ev_io sigev;
560 961
561static void 962void inline_size
562signals_init (ANSIG *base, int count) 963signals_init (ANSIG *base, int count)
563{ 964{
564 while (count--) 965 while (count--)
565 { 966 {
566 base->head = 0; 967 base->head = 0;
… …
568 969
569 ++base; 970 ++base;
570 } 971 }
571} 972}
572 973
974/*****************************************************************************/
975
976void inline_speed
977fd_intern (int fd)
978{
979#ifdef _WIN32
980 int arg = 1;
981 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
982#else
983 fcntl (fd, F_SETFD, FD_CLOEXEC);
984 fcntl (fd, F_SETFL, O_NONBLOCK);
985#endif
986}
987
988static void noinline
989evpipe_init (EV_P)
990{
991 if (!ev_is_active (&pipeev))
992 {
993#if EV_USE_EVENTFD
994 if ((evfd = eventfd (0, 0)) >= 0)
995 {
996 evpipe [0] = -1;
997 fd_intern (evfd);
998 ev_io_set (&pipeev, evfd, EV_READ);
999 }
1000 else
1001#endif
1002 {
1003 while (pipe (evpipe))
1004 syserr ("(libev) error creating signal/async pipe");
1005
1006 fd_intern (evpipe [0]);
1007 fd_intern (evpipe [1]);
1008 ev_io_set (&pipeev, evpipe [0], EV_READ);
1009 }
1010
1011 ev_io_start (EV_A_ &pipeev);
1012 ev_unref (EV_A); /* watcher should not keep loop alive */
1013 }
1014}
1015
1016void inline_size
1017evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1018{
1019 if (!*flag)
1020 {
1021 int old_errno = errno; /* save errno because write might clobber it */
1022
1023 *flag = 1;
1024
1025#if EV_USE_EVENTFD
1026 if (evfd >= 0)
1027 {
1028 uint64_t counter = 1;
1029 write (evfd, &counter, sizeof (uint64_t));
1030 }
1031 else
1032#endif
1033 write (evpipe [1], &old_errno, 1);
1034
1035 errno = old_errno;
1036 }
1037}
1038
573static void 1039static void
1040pipecb (EV_P_ ev_io *iow, int revents)
1041{
1042#if EV_USE_EVENTFD
1043 if (evfd >= 0)
1044 {
1045 uint64_t counter;
1046 read (evfd, &counter, sizeof (uint64_t));
1047 }
1048 else
1049#endif
1050 {
1051 char dummy;
1052 read (evpipe [0], &dummy, 1);
1053 }
1054
1055 if (gotsig && ev_is_default_loop (EV_A))
1056 {
1057 int signum;
1058 gotsig = 0;
1059
1060 for (signum = signalmax; signum--; )
1061 if (signals [signum].gotsig)
1062 ev_feed_signal_event (EV_A_ signum + 1);
1063 }
1064
1065#if EV_ASYNC_ENABLE
1066 if (gotasync)
1067 {
1068 int i;
1069 gotasync = 0;
1070
1071 for (i = asynccnt; i--; )
1072 if (asyncs [i]->sent)
1073 {
1074 asyncs [i]->sent = 0;
1075 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1076 }
1077 }
1078#endif
1079}
1080
1081/*****************************************************************************/
1082
1083static void
574sighandler (int signum) 1084ev_sighandler (int signum)
575{ 1085{
1086#if EV_MULTIPLICITY
1087 struct ev_loop *loop = &default_loop_struct;
1088#endif
1089
576#if WIN32 1090#if _WIN32
577 signal (signum, sighandler); 1091 signal (signum, ev_sighandler);
578#endif 1092#endif
579 1093
580 signals [signum - 1].gotsig = 1; 1094 signals [signum - 1].gotsig = 1;
581 1095 evpipe_write (EV_A_ &gotsig);
582 if (!gotsig)
583 {
584 int old_errno = errno;
585 gotsig = 1;
586#ifdef WIN32
587 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
588#else
589 write (sigpipe [1], &signum, 1);
590#endif
591 errno = old_errno;
592 }
593} 1096}
594 1097
595void 1098void noinline
596ev_feed_signal_event (EV_P_ int signum) 1099ev_feed_signal_event (EV_P_ int signum)
597{ 1100{
598 WL w; 1101 WL w;
599 1102
600#if EV_MULTIPLICITY 1103#if EV_MULTIPLICITY
601 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1104 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
602#endif 1105#endif
603 1106
604 --signum; 1107 --signum;
605 1108
606 if (signum < 0 || signum >= signalmax) 1109 if (signum < 0 || signum >= signalmax)
… …
610 1113
611 for (w = signals [signum].head; w; w = w->next) 1114 for (w = signals [signum].head; w; w = w->next)
612 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1115 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
613} 1116}
614 1117
615static void
616sigcb (EV_P_ struct ev_io *iow, int revents)
617{
618 int signum;
619
620#ifdef WIN32
621 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
622#else
623 read (sigpipe [0], &revents, 1);
624#endif
625 gotsig = 0;
626
627 for (signum = signalmax; signum--; )
628 if (signals [signum].gotsig)
629 ev_feed_signal_event (EV_A_ signum + 1);
630}
631
632static void
633siginit (EV_P)
634{
635#ifndef WIN32
636 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
637 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
638
639 /* rather than sort out wether we really need nb, set it */
640 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
641 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
642#endif
643
644 ev_io_set (&sigev, sigpipe [0], EV_READ);
645 ev_io_start (EV_A_ &sigev);
646 ev_unref (EV_A); /* child watcher should not keep loop alive */
647}
648
649/*****************************************************************************/ 1118/*****************************************************************************/
650 1119
651static struct ev_child *childs [PID_HASHSIZE]; 1120static WL childs [EV_PID_HASHSIZE];
652 1121
653#ifndef WIN32 1122#ifndef _WIN32
654 1123
655static struct ev_signal childev; 1124static ev_signal childev;
1125
1126#ifndef WIFCONTINUED
1127# define WIFCONTINUED(status) 0
1128#endif
1129
1130void inline_speed
1131child_reap (EV_P_ int chain, int pid, int status)
1132{
1133 ev_child *w;
1134 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1135
1136 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1137 {
1138 if ((w->pid == pid || !w->pid)
1139 && (!traced || (w->flags & 1)))
1140 {
1141 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1142 w->rpid = pid;
1143 w->rstatus = status;
1144 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1145 }
1146 }
1147}
656 1148
657#ifndef WCONTINUED 1149#ifndef WCONTINUED
658# define WCONTINUED 0 1150# define WCONTINUED 0
659#endif 1151#endif
660 1152
661static void 1153static void
662child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
663{
664 struct ev_child *w;
665
666 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
667 if (w->pid == pid || !w->pid)
668 {
669 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
670 w->rpid = pid;
671 w->rstatus = status;
672 ev_feed_event (EV_A_ (W)w, EV_CHILD);
673 }
674}
675
676static void
677childcb (EV_P_ struct ev_signal *sw, int revents) 1154childcb (EV_P_ ev_signal *sw, int revents)
678{ 1155{
679 int pid, status; 1156 int pid, status;
680 1157
1158 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
681 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1159 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
682 { 1160 if (!WCONTINUED
1161 || errno != EINVAL
1162 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1163 return;
1164
683 /* make sure we are called again until all childs have been reaped */ 1165 /* make sure we are called again until all children have been reaped */
1166 /* we need to do it this way so that the callback gets called before we continue */
684 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1167 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
685 1168
686 child_reap (EV_A_ sw, pid, pid, status); 1169 child_reap (EV_A_ pid, pid, status);
1170 if (EV_PID_HASHSIZE > 1)
687 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1171 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
688 }
689} 1172}
690 1173
691#endif 1174#endif
692 1175
693/*****************************************************************************/ 1176/*****************************************************************************/
694 1177
1178#if EV_USE_PORT
1179# include "ev_port.c"
1180#endif
695#if EV_USE_KQUEUE 1181#if EV_USE_KQUEUE
696# include "ev_kqueue.c" 1182# include "ev_kqueue.c"
697#endif 1183#endif
698#if EV_USE_EPOLL 1184#if EV_USE_EPOLL
699# include "ev_epoll.c" 1185# include "ev_epoll.c"
… …
716{ 1202{
717 return EV_VERSION_MINOR; 1203 return EV_VERSION_MINOR;
718} 1204}
719 1205
720/* return true if we are running with elevated privileges and should ignore env variables */ 1206/* return true if we are running with elevated privileges and should ignore env variables */
721static int 1207int inline_size
722enable_secure (void) 1208enable_secure (void)
723{ 1209{
724#ifdef WIN32 1210#ifdef _WIN32
725 return 0; 1211 return 0;
726#else 1212#else
727 return getuid () != geteuid () 1213 return getuid () != geteuid ()
728 || getgid () != getegid (); 1214 || getgid () != getegid ();
729#endif 1215#endif
730} 1216}
731 1217
732int 1218unsigned int
733ev_method (EV_P) 1219ev_supported_backends (void)
734{ 1220{
735 return method; 1221 unsigned int flags = 0;
736}
737 1222
738static void 1223 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
739loop_init (EV_P_ int methods) 1224 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1225 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1226 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1227 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1228
1229 return flags;
1230}
1231
1232unsigned int
1233ev_recommended_backends (void)
740{ 1234{
741 if (!method) 1235 unsigned int flags = ev_supported_backends ();
1236
1237#ifndef __NetBSD__
1238 /* kqueue is borked on everything but netbsd apparently */
1239 /* it usually doesn't work correctly on anything but sockets and pipes */
1240 flags &= ~EVBACKEND_KQUEUE;
1241#endif
1242#ifdef __APPLE__
1243 // flags &= ~EVBACKEND_KQUEUE; for documentation
1244 flags &= ~EVBACKEND_POLL;
1245#endif
1246
1247 return flags;
1248}
1249
1250unsigned int
1251ev_embeddable_backends (void)
1252{
1253 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1254
1255 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1256 /* please fix it and tell me how to detect the fix */
1257 flags &= ~EVBACKEND_EPOLL;
1258
1259 return flags;
1260}
1261
1262unsigned int
1263ev_backend (EV_P)
1264{
1265 return backend;
1266}
1267
1268unsigned int
1269ev_loop_count (EV_P)
1270{
1271 return loop_count;
1272}
1273
1274void
1275ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1276{
1277 io_blocktime = interval;
1278}
1279
1280void
1281ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1282{
1283 timeout_blocktime = interval;
1284}
1285
1286static void noinline
1287loop_init (EV_P_ unsigned int flags)
1288{
1289 if (!backend)
742 { 1290 {
743#if EV_USE_MONOTONIC 1291#if EV_USE_MONOTONIC
744 { 1292 {
745 struct timespec ts; 1293 struct timespec ts;
746 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1294 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
747 have_monotonic = 1; 1295 have_monotonic = 1;
748 } 1296 }
749#endif 1297#endif
750 1298
751 ev_rt_now = ev_time (); 1299 ev_rt_now = ev_time ();
752 mn_now = get_clock (); 1300 mn_now = get_clock ();
753 now_floor = mn_now; 1301 now_floor = mn_now;
754 rtmn_diff = ev_rt_now - mn_now; 1302 rtmn_diff = ev_rt_now - mn_now;
755 1303
756 if (methods == EVMETHOD_AUTO) 1304 io_blocktime = 0.;
757 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1305 timeout_blocktime = 0.;
1306 backend = 0;
1307 backend_fd = -1;
1308 gotasync = 0;
1309#if EV_USE_INOTIFY
1310 fs_fd = -2;
1311#endif
1312
1313 /* pid check not overridable via env */
1314#ifndef _WIN32
1315 if (flags & EVFLAG_FORKCHECK)
1316 curpid = getpid ();
1317#endif
1318
1319 if (!(flags & EVFLAG_NOENV)
1320 && !enable_secure ()
1321 && getenv ("LIBEV_FLAGS"))
758 methods = atoi (getenv ("LIBEV_METHODS")); 1322 flags = atoi (getenv ("LIBEV_FLAGS"));
759 else
760 methods = EVMETHOD_ANY;
761 1323
762 method = 0; 1324 if (!(flags & 0x0000ffffU))
763#if EV_USE_WIN32 1325 flags |= ev_recommended_backends ();
764 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1326
1327#if EV_USE_PORT
1328 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
765#endif 1329#endif
766#if EV_USE_KQUEUE 1330#if EV_USE_KQUEUE
767 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1331 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
768#endif 1332#endif
769#if EV_USE_EPOLL 1333#if EV_USE_EPOLL
770 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1334 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
771#endif 1335#endif
772#if EV_USE_POLL 1336#if EV_USE_POLL
773 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1337 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
774#endif 1338#endif
775#if EV_USE_SELECT 1339#if EV_USE_SELECT
776 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1340 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
777#endif 1341#endif
778 1342
779 ev_init (&sigev, sigcb); 1343 ev_init (&pipeev, pipecb);
780 ev_set_priority (&sigev, EV_MAXPRI); 1344 ev_set_priority (&pipeev, EV_MAXPRI);
781 } 1345 }
782} 1346}
783 1347
784void 1348static void noinline
785loop_destroy (EV_P) 1349loop_destroy (EV_P)
786{ 1350{
787 int i; 1351 int i;
788 1352
1353 if (ev_is_active (&pipeev))
1354 {
1355 ev_ref (EV_A); /* signal watcher */
1356 ev_io_stop (EV_A_ &pipeev);
1357
1358#if EV_USE_EVENTFD
1359 if (evfd >= 0)
1360 close (evfd);
1361#endif
1362
1363 if (evpipe [0] >= 0)
1364 {
1365 close (evpipe [0]);
1366 close (evpipe [1]);
1367 }
1368 }
1369
789#if EV_USE_WIN32 1370#if EV_USE_INOTIFY
790 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1371 if (fs_fd >= 0)
1372 close (fs_fd);
1373#endif
1374
1375 if (backend_fd >= 0)
1376 close (backend_fd);
1377
1378#if EV_USE_PORT
1379 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
791#endif 1380#endif
792#if EV_USE_KQUEUE 1381#if EV_USE_KQUEUE
793 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1382 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
794#endif 1383#endif
795#if EV_USE_EPOLL 1384#if EV_USE_EPOLL
796 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1385 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
797#endif 1386#endif
798#if EV_USE_POLL 1387#if EV_USE_POLL
799 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1388 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
800#endif 1389#endif
801#if EV_USE_SELECT 1390#if EV_USE_SELECT
802 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1391 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
803#endif 1392#endif
804 1393
805 for (i = NUMPRI; i--; ) 1394 for (i = NUMPRI; i--; )
1395 {
806 array_free (pending, [i]); 1396 array_free (pending, [i]);
1397#if EV_IDLE_ENABLE
1398 array_free (idle, [i]);
1399#endif
1400 }
1401
1402 ev_free (anfds); anfdmax = 0;
807 1403
808 /* have to use the microsoft-never-gets-it-right macro */ 1404 /* have to use the microsoft-never-gets-it-right macro */
809 array_free_microshit (fdchange); 1405 array_free (fdchange, EMPTY);
810 array_free_microshit (timer); 1406 array_free (timer, EMPTY);
811#if EV_PERIODICS 1407#if EV_PERIODIC_ENABLE
812 array_free_microshit (periodic); 1408 array_free (periodic, EMPTY);
813#endif 1409#endif
814 array_free_microshit (idle); 1410#if EV_FORK_ENABLE
815 array_free_microshit (prepare); 1411 array_free (fork, EMPTY);
816 array_free_microshit (check); 1412#endif
1413 array_free (prepare, EMPTY);
1414 array_free (check, EMPTY);
1415#if EV_ASYNC_ENABLE
1416 array_free (async, EMPTY);
1417#endif
817 1418
818 method = 0; 1419 backend = 0;
819} 1420}
820 1421
821static void 1422#if EV_USE_INOTIFY
1423void inline_size infy_fork (EV_P);
1424#endif
1425
1426void inline_size
822loop_fork (EV_P) 1427loop_fork (EV_P)
823{ 1428{
1429#if EV_USE_PORT
1430 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1431#endif
1432#if EV_USE_KQUEUE
1433 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1434#endif
824#if EV_USE_EPOLL 1435#if EV_USE_EPOLL
825 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1436 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
826#endif 1437#endif
827#if EV_USE_KQUEUE 1438#if EV_USE_INOTIFY
828 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1439 infy_fork (EV_A);
829#endif 1440#endif
830 1441
831 if (ev_is_active (&sigev)) 1442 if (ev_is_active (&pipeev))
832 { 1443 {
833 /* default loop */ 1444 /* this "locks" the handlers against writing to the pipe */
1445 /* while we modify the fd vars */
1446 gotsig = 1;
1447#if EV_ASYNC_ENABLE
1448 gotasync = 1;
1449#endif
834 1450
835 ev_ref (EV_A); 1451 ev_ref (EV_A);
836 ev_io_stop (EV_A_ &sigev); 1452 ev_io_stop (EV_A_ &pipeev);
1453
1454#if EV_USE_EVENTFD
1455 if (evfd >= 0)
1456 close (evfd);
1457#endif
1458
1459 if (evpipe [0] >= 0)
1460 {
837 close (sigpipe [0]); 1461 close (evpipe [0]);
838 close (sigpipe [1]); 1462 close (evpipe [1]);
1463 }
839 1464
840 while (pipe (sigpipe))
841 syserr ("(libev) error creating pipe");
842
843 siginit (EV_A); 1465 evpipe_init (EV_A);
1466 /* now iterate over everything, in case we missed something */
1467 pipecb (EV_A_ &pipeev, EV_READ);
844 } 1468 }
845 1469
846 postfork = 0; 1470 postfork = 0;
847} 1471}
1472
1473#if EV_MULTIPLICITY
1474
1475struct ev_loop *
1476ev_loop_new (unsigned int flags)
1477{
1478 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1479
1480 memset (loop, 0, sizeof (struct ev_loop));
1481
1482 loop_init (EV_A_ flags);
1483
1484 if (ev_backend (EV_A))
1485 return loop;
1486
1487 return 0;
1488}
1489
1490void
1491ev_loop_destroy (EV_P)
1492{
1493 loop_destroy (EV_A);
1494 ev_free (loop);
1495}
1496
1497void
1498ev_loop_fork (EV_P)
1499{
1500 postfork = 1; /* must be in line with ev_default_fork */
1501}
1502
1503#if EV_VERIFY
1504void noinline
1505verify_watcher (EV_P_ W w)
1506{
1507 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1508
1509 if (w->pending)
1510 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1511}
1512
1513static void noinline
1514verify_heap (EV_P_ ANHE *heap, int N)
1515{
1516 int i;
1517
1518 for (i = HEAP0; i < N + HEAP0; ++i)
1519 {
1520 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1521 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1522 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1523
1524 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1525 }
1526}
1527
1528static void noinline
1529array_verify (EV_P_ W *ws, int cnt)
1530{
1531 while (cnt--)
1532 {
1533 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1534 verify_watcher (EV_A_ ws [cnt]);
1535 }
1536}
1537#endif
1538
1539void
1540ev_loop_verify (EV_P)
1541{
1542#if EV_VERIFY
1543 int i;
1544 WL w;
1545
1546 assert (activecnt >= -1);
1547
1548 assert (fdchangemax >= fdchangecnt);
1549 for (i = 0; i < fdchangecnt; ++i)
1550 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1551
1552 assert (anfdmax >= 0);
1553 for (i = 0; i < anfdmax; ++i)
1554 for (w = anfds [i].head; w; w = w->next)
1555 {
1556 verify_watcher (EV_A_ (W)w);
1557 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1558 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1559 }
1560
1561 assert (timermax >= timercnt);
1562 verify_heap (EV_A_ timers, timercnt);
1563
1564#if EV_PERIODIC_ENABLE
1565 assert (periodicmax >= periodiccnt);
1566 verify_heap (EV_A_ periodics, periodiccnt);
1567#endif
1568
1569 for (i = NUMPRI; i--; )
1570 {
1571 assert (pendingmax [i] >= pendingcnt [i]);
1572#if EV_IDLE_ENABLE
1573 assert (idlemax [i] >= idlecnt [i]);
1574 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1575#endif
1576 }
1577
1578#if EV_FORK_ENABLE
1579 assert (forkmax >= forkcnt);
1580 array_verify (EV_A_ (W *)forks, forkcnt);
1581#endif
1582
1583#if EV_ASYNC_ENABLE
1584 assert (asyncmax >= asynccnt);
1585 array_verify (EV_A_ (W *)asyncs, asynccnt);
1586#endif
1587
1588 assert (preparemax >= preparecnt);
1589 array_verify (EV_A_ (W *)prepares, preparecnt);
1590
1591 assert (checkmax >= checkcnt);
1592 array_verify (EV_A_ (W *)checks, checkcnt);
1593
1594# if 0
1595 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1596 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1597# endif
1598#endif
1599}
1600
1601#endif /* multiplicity */
848 1602
849#if EV_MULTIPLICITY 1603#if EV_MULTIPLICITY
850struct ev_loop * 1604struct ev_loop *
851ev_loop_new (int methods) 1605ev_default_loop_init (unsigned int flags)
852{
853 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
854
855 memset (loop, 0, sizeof (struct ev_loop));
856
857 loop_init (EV_A_ methods);
858
859 if (ev_method (EV_A))
860 return loop;
861
862 return 0;
863}
864
865void
866ev_loop_destroy (EV_P)
867{
868 loop_destroy (EV_A);
869 ev_free (loop);
870}
871
872void
873ev_loop_fork (EV_P)
874{
875 postfork = 1;
876}
877
878#endif
879
880#if EV_MULTIPLICITY
881struct ev_loop *
882#else 1606#else
883int 1607int
1608ev_default_loop (unsigned int flags)
884#endif 1609#endif
885ev_default_loop (int methods)
886{ 1610{
887 if (sigpipe [0] == sigpipe [1])
888 if (pipe (sigpipe))
889 return 0;
890
891 if (!default_loop) 1611 if (!ev_default_loop_ptr)
892 { 1612 {
893#if EV_MULTIPLICITY 1613#if EV_MULTIPLICITY
894 struct ev_loop *loop = default_loop = &default_loop_struct; 1614 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
895#else 1615#else
896 default_loop = 1; 1616 ev_default_loop_ptr = 1;
897#endif 1617#endif
898 1618
899 loop_init (EV_A_ methods); 1619 loop_init (EV_A_ flags);
900 1620
901 if (ev_method (EV_A)) 1621 if (ev_backend (EV_A))
902 { 1622 {
903 siginit (EV_A);
904
905#ifndef WIN32 1623#ifndef _WIN32
906 ev_signal_init (&childev, childcb, SIGCHLD); 1624 ev_signal_init (&childev, childcb, SIGCHLD);
907 ev_set_priority (&childev, EV_MAXPRI); 1625 ev_set_priority (&childev, EV_MAXPRI);
908 ev_signal_start (EV_A_ &childev); 1626 ev_signal_start (EV_A_ &childev);
909 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1627 ev_unref (EV_A); /* child watcher should not keep loop alive */
910#endif 1628#endif
911 } 1629 }
912 else 1630 else
913 default_loop = 0; 1631 ev_default_loop_ptr = 0;
914 } 1632 }
915 1633
916 return default_loop; 1634 return ev_default_loop_ptr;
917} 1635}
918 1636
919void 1637void
920ev_default_destroy (void) 1638ev_default_destroy (void)
921{ 1639{
922#if EV_MULTIPLICITY 1640#if EV_MULTIPLICITY
923 struct ev_loop *loop = default_loop; 1641 struct ev_loop *loop = ev_default_loop_ptr;
924#endif 1642#endif
925 1643
926#ifndef WIN32 1644#ifndef _WIN32
927 ev_ref (EV_A); /* child watcher */ 1645 ev_ref (EV_A); /* child watcher */
928 ev_signal_stop (EV_A_ &childev); 1646 ev_signal_stop (EV_A_ &childev);
929#endif 1647#endif
930 1648
931 ev_ref (EV_A); /* signal watcher */
932 ev_io_stop (EV_A_ &sigev);
933
934 close (sigpipe [0]); sigpipe [0] = 0;
935 close (sigpipe [1]); sigpipe [1] = 0;
936
937 loop_destroy (EV_A); 1649 loop_destroy (EV_A);
938} 1650}
939 1651
940void 1652void
941ev_default_fork (void) 1653ev_default_fork (void)
942{ 1654{
943#if EV_MULTIPLICITY 1655#if EV_MULTIPLICITY
944 struct ev_loop *loop = default_loop; 1656 struct ev_loop *loop = ev_default_loop_ptr;
945#endif 1657#endif
946 1658
947 if (method) 1659 if (backend)
948 postfork = 1; 1660 postfork = 1; /* must be in line with ev_loop_fork */
949} 1661}
950 1662
951/*****************************************************************************/ 1663/*****************************************************************************/
952 1664
953static int 1665void
954any_pending (EV_P) 1666ev_invoke (EV_P_ void *w, int revents)
955{ 1667{
956 int pri; 1668 EV_CB_INVOKE ((W)w, revents);
957
958 for (pri = NUMPRI; pri--; )
959 if (pendingcnt [pri])
960 return 1;
961
962 return 0;
963} 1669}
964 1670
965static void 1671void inline_speed
966call_pending (EV_P) 1672call_pending (EV_P)
967{ 1673{
968 int pri; 1674 int pri;
969 1675
970 for (pri = NUMPRI; pri--; ) 1676 for (pri = NUMPRI; pri--; )
971 while (pendingcnt [pri]) 1677 while (pendingcnt [pri])
972 { 1678 {
973 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1679 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
974 1680
975 if (p->w) 1681 if (expect_true (p->w))
976 { 1682 {
1683 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1684
977 p->w->pending = 0; 1685 p->w->pending = 0;
978 EV_CB_INVOKE (p->w, p->events); 1686 EV_CB_INVOKE (p->w, p->events);
1687 EV_FREQUENT_CHECK;
979 } 1688 }
980 } 1689 }
981} 1690}
982 1691
983static void 1692#if EV_IDLE_ENABLE
1693void inline_size
1694idle_reify (EV_P)
1695{
1696 if (expect_false (idleall))
1697 {
1698 int pri;
1699
1700 for (pri = NUMPRI; pri--; )
1701 {
1702 if (pendingcnt [pri])
1703 break;
1704
1705 if (idlecnt [pri])
1706 {
1707 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1708 break;
1709 }
1710 }
1711 }
1712}
1713#endif
1714
1715void inline_size
984timers_reify (EV_P) 1716timers_reify (EV_P)
985{ 1717{
1718 EV_FREQUENT_CHECK;
1719
986 while (timercnt && ((WT)timers [0])->at <= mn_now) 1720 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
987 { 1721 {
988 struct ev_timer *w = timers [0]; 1722 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
989 1723
990 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1724 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
991 1725
992 /* first reschedule or stop timer */ 1726 /* first reschedule or stop timer */
993 if (w->repeat) 1727 if (w->repeat)
994 { 1728 {
1729 ev_at (w) += w->repeat;
1730 if (ev_at (w) < mn_now)
1731 ev_at (w) = mn_now;
1732
995 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1733 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
996 1734
997 ((WT)w)->at += w->repeat; 1735 ANHE_at_cache (timers [HEAP0]);
998 if (((WT)w)->at < mn_now)
999 ((WT)w)->at = mn_now;
1000
1001 downheap ((WT *)timers, timercnt, 0); 1736 downheap (timers, timercnt, HEAP0);
1002 } 1737 }
1003 else 1738 else
1004 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1739 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1005 1740
1741 EV_FREQUENT_CHECK;
1006 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1742 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1007 } 1743 }
1008} 1744}
1009 1745
1010#if EV_PERIODICS 1746#if EV_PERIODIC_ENABLE
1011static void 1747void inline_size
1012periodics_reify (EV_P) 1748periodics_reify (EV_P)
1013{ 1749{
1750 EV_FREQUENT_CHECK;
1751
1014 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1752 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1015 { 1753 {
1016 struct ev_periodic *w = periodics [0]; 1754 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1017 1755
1018 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1756 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1019 1757
1020 /* first reschedule or stop timer */ 1758 /* first reschedule or stop timer */
1021 if (w->reschedule_cb) 1759 if (w->reschedule_cb)
1022 { 1760 {
1023 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1761 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1024 1762
1025 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1763 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1764
1765 ANHE_at_cache (periodics [HEAP0]);
1026 downheap ((WT *)periodics, periodiccnt, 0); 1766 downheap (periodics, periodiccnt, HEAP0);
1027 } 1767 }
1028 else if (w->interval) 1768 else if (w->interval)
1029 { 1769 {
1030 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1770 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1031 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1771 /* if next trigger time is not sufficiently in the future, put it there */
1772 /* this might happen because of floating point inexactness */
1773 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1774 {
1775 ev_at (w) += w->interval;
1776
1777 /* if interval is unreasonably low we might still have a time in the past */
1778 /* so correct this. this will make the periodic very inexact, but the user */
1779 /* has effectively asked to get triggered more often than possible */
1780 if (ev_at (w) < ev_rt_now)
1781 ev_at (w) = ev_rt_now;
1782 }
1783
1784 ANHE_at_cache (periodics [HEAP0]);
1032 downheap ((WT *)periodics, periodiccnt, 0); 1785 downheap (periodics, periodiccnt, HEAP0);
1033 } 1786 }
1034 else 1787 else
1035 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1788 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1036 1789
1790 EV_FREQUENT_CHECK;
1037 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1791 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1038 } 1792 }
1039} 1793}
1040 1794
1041static void 1795static void noinline
1042periodics_reschedule (EV_P) 1796periodics_reschedule (EV_P)
1043{ 1797{
1044 int i; 1798 int i;
1045 1799
1046 /* adjust periodics after time jump */ 1800 /* adjust periodics after time jump */
1047 for (i = 0; i < periodiccnt; ++i) 1801 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1048 { 1802 {
1049 struct ev_periodic *w = periodics [i]; 1803 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1050 1804
1051 if (w->reschedule_cb) 1805 if (w->reschedule_cb)
1052 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1806 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1053 else if (w->interval) 1807 else if (w->interval)
1054 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1808 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1809
1810 ANHE_at_cache (periodics [i]);
1811 }
1812
1813 reheap (periodics, periodiccnt);
1814}
1815#endif
1816
1817void inline_speed
1818time_update (EV_P_ ev_tstamp max_block)
1819{
1820 int i;
1821
1822#if EV_USE_MONOTONIC
1823 if (expect_true (have_monotonic))
1055 } 1824 {
1825 ev_tstamp odiff = rtmn_diff;
1056 1826
1057 /* now rebuild the heap */
1058 for (i = periodiccnt >> 1; i--; )
1059 downheap ((WT *)periodics, periodiccnt, i);
1060}
1061#endif
1062
1063inline int
1064time_update_monotonic (EV_P)
1065{
1066 mn_now = get_clock (); 1827 mn_now = get_clock ();
1067 1828
1829 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1830 /* interpolate in the meantime */
1068 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1831 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1069 { 1832 {
1070 ev_rt_now = rtmn_diff + mn_now; 1833 ev_rt_now = rtmn_diff + mn_now;
1071 return 0; 1834 return;
1072 } 1835 }
1073 else 1836
1074 {
1075 now_floor = mn_now; 1837 now_floor = mn_now;
1076 ev_rt_now = ev_time (); 1838 ev_rt_now = ev_time ();
1077 return 1;
1078 }
1079}
1080 1839
1081static void 1840 /* loop a few times, before making important decisions.
1082time_update (EV_P) 1841 * on the choice of "4": one iteration isn't enough,
1083{ 1842 * in case we get preempted during the calls to
1084 int i; 1843 * ev_time and get_clock. a second call is almost guaranteed
1085 1844 * to succeed in that case, though. and looping a few more times
1086#if EV_USE_MONOTONIC 1845 * doesn't hurt either as we only do this on time-jumps or
1087 if (expect_true (have_monotonic)) 1846 * in the unlikely event of having been preempted here.
1088 { 1847 */
1089 if (time_update_monotonic (EV_A)) 1848 for (i = 4; --i; )
1090 { 1849 {
1091 ev_tstamp odiff = rtmn_diff; 1850 rtmn_diff = ev_rt_now - mn_now;
1092 1851
1093 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1852 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1853 return; /* all is well */
1854
1855 ev_rt_now = ev_time ();
1856 mn_now = get_clock ();
1857 now_floor = mn_now;
1858 }
1859
1860# if EV_PERIODIC_ENABLE
1861 periodics_reschedule (EV_A);
1862# endif
1863 /* no timer adjustment, as the monotonic clock doesn't jump */
1864 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1865 }
1866 else
1867#endif
1868 {
1869 ev_rt_now = ev_time ();
1870
1871 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1872 {
1873#if EV_PERIODIC_ENABLE
1874 periodics_reschedule (EV_A);
1875#endif
1876 /* adjust timers. this is easy, as the offset is the same for all of them */
1877 for (i = 0; i < timercnt; ++i)
1094 { 1878 {
1095 rtmn_diff = ev_rt_now - mn_now; 1879 ANHE *he = timers + i + HEAP0;
1096 1880 ANHE_w (*he)->at += ev_rt_now - mn_now;
1097 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1881 ANHE_at_cache (*he);
1098 return; /* all is well */
1099
1100 ev_rt_now = ev_time ();
1101 mn_now = get_clock ();
1102 now_floor = mn_now;
1103 } 1882 }
1104
1105# if EV_PERIODICS
1106 periodics_reschedule (EV_A);
1107# endif
1108 /* no timer adjustment, as the monotonic clock doesn't jump */
1109 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1110 } 1883 }
1111 }
1112 else
1113#endif
1114 {
1115 ev_rt_now = ev_time ();
1116
1117 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1118 {
1119#if EV_PERIODICS
1120 periodics_reschedule (EV_A);
1121#endif
1122
1123 /* adjust timers. this is easy, as the offset is the same for all */
1124 for (i = 0; i < timercnt; ++i)
1125 ((WT)timers [i])->at += ev_rt_now - mn_now;
1126 }
1127 1884
1128 mn_now = ev_rt_now; 1885 mn_now = ev_rt_now;
1129 } 1886 }
1130} 1887}
1131 1888
… …
1144static int loop_done; 1901static int loop_done;
1145 1902
1146void 1903void
1147ev_loop (EV_P_ int flags) 1904ev_loop (EV_P_ int flags)
1148{ 1905{
1149 double block; 1906 loop_done = EVUNLOOP_CANCEL;
1150 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1907
1908 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1151 1909
1152 do 1910 do
1153 { 1911 {
1912#if EV_VERIFY >= 2
1913 ev_loop_verify (EV_A);
1914#endif
1915
1916#ifndef _WIN32
1917 if (expect_false (curpid)) /* penalise the forking check even more */
1918 if (expect_false (getpid () != curpid))
1919 {
1920 curpid = getpid ();
1921 postfork = 1;
1922 }
1923#endif
1924
1925#if EV_FORK_ENABLE
1926 /* we might have forked, so queue fork handlers */
1927 if (expect_false (postfork))
1928 if (forkcnt)
1929 {
1930 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1931 call_pending (EV_A);
1932 }
1933#endif
1934
1154 /* queue check watchers (and execute them) */ 1935 /* queue prepare watchers (and execute them) */
1155 if (expect_false (preparecnt)) 1936 if (expect_false (preparecnt))
1156 { 1937 {
1157 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1938 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1158 call_pending (EV_A); 1939 call_pending (EV_A);
1159 } 1940 }
1160 1941
1942 if (expect_false (!activecnt))
1943 break;
1944
1161 /* we might have forked, so reify kernel state if necessary */ 1945 /* we might have forked, so reify kernel state if necessary */
1162 if (expect_false (postfork)) 1946 if (expect_false (postfork))
1163 loop_fork (EV_A); 1947 loop_fork (EV_A);
1164 1948
1165 /* update fd-related kernel structures */ 1949 /* update fd-related kernel structures */
1166 fd_reify (EV_A); 1950 fd_reify (EV_A);
1167 1951
1168 /* calculate blocking time */ 1952 /* calculate blocking time */
1953 {
1954 ev_tstamp waittime = 0.;
1955 ev_tstamp sleeptime = 0.;
1169 1956
1170 /* we only need this for !monotonic clock or timers, but as we basically 1957 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1171 always have timers, we just calculate it always */
1172#if EV_USE_MONOTONIC
1173 if (expect_true (have_monotonic))
1174 time_update_monotonic (EV_A);
1175 else
1176#endif
1177 { 1958 {
1178 ev_rt_now = ev_time (); 1959 /* update time to cancel out callback processing overhead */
1179 mn_now = ev_rt_now; 1960 time_update (EV_A_ 1e100);
1180 }
1181 1961
1182 if (flags & EVLOOP_NONBLOCK || idlecnt)
1183 block = 0.;
1184 else
1185 {
1186 block = MAX_BLOCKTIME; 1962 waittime = MAX_BLOCKTIME;
1187 1963
1188 if (timercnt) 1964 if (timercnt)
1189 { 1965 {
1190 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1966 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1191 if (block > to) block = to; 1967 if (waittime > to) waittime = to;
1192 } 1968 }
1193 1969
1194#if EV_PERIODICS 1970#if EV_PERIODIC_ENABLE
1195 if (periodiccnt) 1971 if (periodiccnt)
1196 { 1972 {
1197 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1973 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1198 if (block > to) block = to; 1974 if (waittime > to) waittime = to;
1199 } 1975 }
1200#endif 1976#endif
1201 1977
1202 if (block < 0.) block = 0.; 1978 if (expect_false (waittime < timeout_blocktime))
1979 waittime = timeout_blocktime;
1980
1981 sleeptime = waittime - backend_fudge;
1982
1983 if (expect_true (sleeptime > io_blocktime))
1984 sleeptime = io_blocktime;
1985
1986 if (sleeptime)
1987 {
1988 ev_sleep (sleeptime);
1989 waittime -= sleeptime;
1990 }
1203 } 1991 }
1204 1992
1205 method_poll (EV_A_ block); 1993 ++loop_count;
1994 backend_poll (EV_A_ waittime);
1206 1995
1207 /* update ev_rt_now, do magic */ 1996 /* update ev_rt_now, do magic */
1208 time_update (EV_A); 1997 time_update (EV_A_ waittime + sleeptime);
1998 }
1209 1999
1210 /* queue pending timers and reschedule them */ 2000 /* queue pending timers and reschedule them */
1211 timers_reify (EV_A); /* relative timers called last */ 2001 timers_reify (EV_A); /* relative timers called last */
1212#if EV_PERIODICS 2002#if EV_PERIODIC_ENABLE
1213 periodics_reify (EV_A); /* absolute timers called first */ 2003 periodics_reify (EV_A); /* absolute timers called first */
1214#endif 2004#endif
1215 2005
2006#if EV_IDLE_ENABLE
1216 /* queue idle watchers unless io or timers are pending */ 2007 /* queue idle watchers unless other events are pending */
1217 if (idlecnt && !any_pending (EV_A)) 2008 idle_reify (EV_A);
1218 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2009#endif
1219 2010
1220 /* queue check watchers, to be executed first */ 2011 /* queue check watchers, to be executed first */
1221 if (checkcnt) 2012 if (expect_false (checkcnt))
1222 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2013 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1223 2014
1224 call_pending (EV_A); 2015 call_pending (EV_A);
1225 } 2016 }
1226 while (activecnt && !loop_done); 2017 while (expect_true (
2018 activecnt
2019 && !loop_done
2020 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2021 ));
1227 2022
1228 if (loop_done != 2) 2023 if (loop_done == EVUNLOOP_ONE)
1229 loop_done = 0; 2024 loop_done = EVUNLOOP_CANCEL;
1230} 2025}
1231 2026
1232void 2027void
1233ev_unloop (EV_P_ int how) 2028ev_unloop (EV_P_ int how)
1234{ 2029{
1235 loop_done = how; 2030 loop_done = how;
1236} 2031}
1237 2032
1238/*****************************************************************************/ 2033/*****************************************************************************/
1239 2034
1240inline void 2035void inline_size
1241wlist_add (WL *head, WL elem) 2036wlist_add (WL *head, WL elem)
1242{ 2037{
1243 elem->next = *head; 2038 elem->next = *head;
1244 *head = elem; 2039 *head = elem;
1245} 2040}
1246 2041
1247inline void 2042void inline_size
1248wlist_del (WL *head, WL elem) 2043wlist_del (WL *head, WL elem)
1249{ 2044{
1250 while (*head) 2045 while (*head)
1251 { 2046 {
1252 if (*head == elem) 2047 if (*head == elem)
… …
1257 2052
1258 head = &(*head)->next; 2053 head = &(*head)->next;
1259 } 2054 }
1260} 2055}
1261 2056
1262inline void 2057void inline_speed
1263ev_clear_pending (EV_P_ W w) 2058clear_pending (EV_P_ W w)
1264{ 2059{
1265 if (w->pending) 2060 if (w->pending)
1266 { 2061 {
1267 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2062 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1268 w->pending = 0; 2063 w->pending = 0;
1269 } 2064 }
1270} 2065}
1271 2066
1272inline void 2067int
2068ev_clear_pending (EV_P_ void *w)
2069{
2070 W w_ = (W)w;
2071 int pending = w_->pending;
2072
2073 if (expect_true (pending))
2074 {
2075 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2076 w_->pending = 0;
2077 p->w = 0;
2078 return p->events;
2079 }
2080 else
2081 return 0;
2082}
2083
2084void inline_size
2085pri_adjust (EV_P_ W w)
2086{
2087 int pri = w->priority;
2088 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2089 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2090 w->priority = pri;
2091}
2092
2093void inline_speed
1273ev_start (EV_P_ W w, int active) 2094ev_start (EV_P_ W w, int active)
1274{ 2095{
1275 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2096 pri_adjust (EV_A_ w);
1276 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1277
1278 w->active = active; 2097 w->active = active;
1279 ev_ref (EV_A); 2098 ev_ref (EV_A);
1280} 2099}
1281 2100
1282inline void 2101void inline_size
1283ev_stop (EV_P_ W w) 2102ev_stop (EV_P_ W w)
1284{ 2103{
1285 ev_unref (EV_A); 2104 ev_unref (EV_A);
1286 w->active = 0; 2105 w->active = 0;
1287} 2106}
1288 2107
1289/*****************************************************************************/ 2108/*****************************************************************************/
1290 2109
1291void 2110void noinline
1292ev_io_start (EV_P_ struct ev_io *w) 2111ev_io_start (EV_P_ ev_io *w)
1293{ 2112{
1294 int fd = w->fd; 2113 int fd = w->fd;
1295 2114
1296 if (ev_is_active (w)) 2115 if (expect_false (ev_is_active (w)))
1297 return; 2116 return;
1298 2117
1299 assert (("ev_io_start called with negative fd", fd >= 0)); 2118 assert (("ev_io_start called with negative fd", fd >= 0));
2119
2120 EV_FREQUENT_CHECK;
1300 2121
1301 ev_start (EV_A_ (W)w, 1); 2122 ev_start (EV_A_ (W)w, 1);
1302 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2123 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1303 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2124 wlist_add (&anfds[fd].head, (WL)w);
1304 2125
1305 fd_change (EV_A_ fd); 2126 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1306} 2127 w->events &= ~EV_IOFDSET;
1307 2128
1308void 2129 EV_FREQUENT_CHECK;
2130}
2131
2132void noinline
1309ev_io_stop (EV_P_ struct ev_io *w) 2133ev_io_stop (EV_P_ ev_io *w)
1310{ 2134{
1311 ev_clear_pending (EV_A_ (W)w); 2135 clear_pending (EV_A_ (W)w);
1312 if (!ev_is_active (w)) 2136 if (expect_false (!ev_is_active (w)))
1313 return; 2137 return;
1314 2138
1315 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2139 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1316 2140
2141 EV_FREQUENT_CHECK;
2142
1317 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2143 wlist_del (&anfds[w->fd].head, (WL)w);
1318 ev_stop (EV_A_ (W)w); 2144 ev_stop (EV_A_ (W)w);
1319 2145
1320 fd_change (EV_A_ w->fd); 2146 fd_change (EV_A_ w->fd, 1);
1321}
1322 2147
1323void 2148 EV_FREQUENT_CHECK;
2149}
2150
2151void noinline
1324ev_timer_start (EV_P_ struct ev_timer *w) 2152ev_timer_start (EV_P_ ev_timer *w)
1325{ 2153{
1326 if (ev_is_active (w)) 2154 if (expect_false (ev_is_active (w)))
1327 return; 2155 return;
1328 2156
1329 ((WT)w)->at += mn_now; 2157 ev_at (w) += mn_now;
1330 2158
1331 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2159 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1332 2160
2161 EV_FREQUENT_CHECK;
2162
2163 ++timercnt;
1333 ev_start (EV_A_ (W)w, ++timercnt); 2164 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1334 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2165 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1335 timers [timercnt - 1] = w; 2166 ANHE_w (timers [ev_active (w)]) = (WT)w;
1336 upheap ((WT *)timers, timercnt - 1); 2167 ANHE_at_cache (timers [ev_active (w)]);
2168 upheap (timers, ev_active (w));
1337 2169
2170 EV_FREQUENT_CHECK;
2171
1338 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2172 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1339} 2173}
1340 2174
1341void 2175void noinline
1342ev_timer_stop (EV_P_ struct ev_timer *w) 2176ev_timer_stop (EV_P_ ev_timer *w)
1343{ 2177{
1344 ev_clear_pending (EV_A_ (W)w); 2178 clear_pending (EV_A_ (W)w);
1345 if (!ev_is_active (w)) 2179 if (expect_false (!ev_is_active (w)))
1346 return; 2180 return;
1347 2181
2182 EV_FREQUENT_CHECK;
2183
2184 {
2185 int active = ev_active (w);
2186
1348 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2187 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1349 2188
1350 if (((W)w)->active < timercnt--) 2189 --timercnt;
2190
2191 if (expect_true (active < timercnt + HEAP0))
1351 { 2192 {
1352 timers [((W)w)->active - 1] = timers [timercnt]; 2193 timers [active] = timers [timercnt + HEAP0];
1353 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2194 adjustheap (timers, timercnt, active);
1354 } 2195 }
2196 }
1355 2197
1356 ((WT)w)->at -= mn_now; 2198 EV_FREQUENT_CHECK;
2199
2200 ev_at (w) -= mn_now;
1357 2201
1358 ev_stop (EV_A_ (W)w); 2202 ev_stop (EV_A_ (W)w);
1359} 2203}
1360 2204
1361void 2205void noinline
1362ev_timer_again (EV_P_ struct ev_timer *w) 2206ev_timer_again (EV_P_ ev_timer *w)
1363{ 2207{
2208 EV_FREQUENT_CHECK;
2209
1364 if (ev_is_active (w)) 2210 if (ev_is_active (w))
1365 { 2211 {
1366 if (w->repeat) 2212 if (w->repeat)
1367 { 2213 {
1368 ((WT)w)->at = mn_now + w->repeat; 2214 ev_at (w) = mn_now + w->repeat;
2215 ANHE_at_cache (timers [ev_active (w)]);
1369 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2216 adjustheap (timers, timercnt, ev_active (w));
1370 } 2217 }
1371 else 2218 else
1372 ev_timer_stop (EV_A_ w); 2219 ev_timer_stop (EV_A_ w);
1373 } 2220 }
1374 else if (w->repeat) 2221 else if (w->repeat)
2222 {
2223 ev_at (w) = w->repeat;
1375 ev_timer_start (EV_A_ w); 2224 ev_timer_start (EV_A_ w);
1376} 2225 }
1377 2226
2227 EV_FREQUENT_CHECK;
2228}
2229
1378#if EV_PERIODICS 2230#if EV_PERIODIC_ENABLE
1379void 2231void noinline
1380ev_periodic_start (EV_P_ struct ev_periodic *w) 2232ev_periodic_start (EV_P_ ev_periodic *w)
1381{ 2233{
1382 if (ev_is_active (w)) 2234 if (expect_false (ev_is_active (w)))
1383 return; 2235 return;
1384 2236
1385 if (w->reschedule_cb) 2237 if (w->reschedule_cb)
1386 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2238 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1387 else if (w->interval) 2239 else if (w->interval)
1388 { 2240 {
1389 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2241 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1390 /* this formula differs from the one in periodic_reify because we do not always round up */ 2242 /* this formula differs from the one in periodic_reify because we do not always round up */
1391 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2243 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1392 } 2244 }
2245 else
2246 ev_at (w) = w->offset;
1393 2247
2248 EV_FREQUENT_CHECK;
2249
2250 ++periodiccnt;
1394 ev_start (EV_A_ (W)w, ++periodiccnt); 2251 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1395 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2252 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1396 periodics [periodiccnt - 1] = w; 2253 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1397 upheap ((WT *)periodics, periodiccnt - 1); 2254 ANHE_at_cache (periodics [ev_active (w)]);
2255 upheap (periodics, ev_active (w));
1398 2256
2257 EV_FREQUENT_CHECK;
2258
1399 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2259 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1400} 2260}
1401 2261
1402void 2262void noinline
1403ev_periodic_stop (EV_P_ struct ev_periodic *w) 2263ev_periodic_stop (EV_P_ ev_periodic *w)
1404{ 2264{
1405 ev_clear_pending (EV_A_ (W)w); 2265 clear_pending (EV_A_ (W)w);
1406 if (!ev_is_active (w)) 2266 if (expect_false (!ev_is_active (w)))
1407 return; 2267 return;
1408 2268
2269 EV_FREQUENT_CHECK;
2270
2271 {
2272 int active = ev_active (w);
2273
1409 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2274 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1410 2275
1411 if (((W)w)->active < periodiccnt--) 2276 --periodiccnt;
2277
2278 if (expect_true (active < periodiccnt + HEAP0))
1412 { 2279 {
1413 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2280 periodics [active] = periodics [periodiccnt + HEAP0];
1414 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2281 adjustheap (periodics, periodiccnt, active);
1415 } 2282 }
2283 }
2284
2285 EV_FREQUENT_CHECK;
1416 2286
1417 ev_stop (EV_A_ (W)w); 2287 ev_stop (EV_A_ (W)w);
1418} 2288}
1419 2289
1420void 2290void noinline
1421ev_periodic_again (EV_P_ struct ev_periodic *w) 2291ev_periodic_again (EV_P_ ev_periodic *w)
1422{ 2292{
1423 /* TODO: use adjustheap and recalculation */ 2293 /* TODO: use adjustheap and recalculation */
1424 ev_periodic_stop (EV_A_ w); 2294 ev_periodic_stop (EV_A_ w);
1425 ev_periodic_start (EV_A_ w); 2295 ev_periodic_start (EV_A_ w);
1426} 2296}
1427#endif 2297#endif
1428 2298
1429void
1430ev_idle_start (EV_P_ struct ev_idle *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++idlecnt);
1436 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1437 idles [idlecnt - 1] = w;
1438}
1439
1440void
1441ev_idle_stop (EV_P_ struct ev_idle *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (ev_is_active (w))
1445 return;
1446
1447 idles [((W)w)->active - 1] = idles [--idlecnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450
1451void
1452ev_prepare_start (EV_P_ struct ev_prepare *w)
1453{
1454 if (ev_is_active (w))
1455 return;
1456
1457 ev_start (EV_A_ (W)w, ++preparecnt);
1458 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1459 prepares [preparecnt - 1] = w;
1460}
1461
1462void
1463ev_prepare_stop (EV_P_ struct ev_prepare *w)
1464{
1465 ev_clear_pending (EV_A_ (W)w);
1466 if (ev_is_active (w))
1467 return;
1468
1469 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1470 ev_stop (EV_A_ (W)w);
1471}
1472
1473void
1474ev_check_start (EV_P_ struct ev_check *w)
1475{
1476 if (ev_is_active (w))
1477 return;
1478
1479 ev_start (EV_A_ (W)w, ++checkcnt);
1480 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1481 checks [checkcnt - 1] = w;
1482}
1483
1484void
1485ev_check_stop (EV_P_ struct ev_check *w)
1486{
1487 ev_clear_pending (EV_A_ (W)w);
1488 if (!ev_is_active (w))
1489 return;
1490
1491 checks [((W)w)->active - 1] = checks [--checkcnt];
1492 ev_stop (EV_A_ (W)w);
1493}
1494
1495#ifndef SA_RESTART 2299#ifndef SA_RESTART
1496# define SA_RESTART 0 2300# define SA_RESTART 0
1497#endif 2301#endif
1498 2302
1499void 2303void noinline
1500ev_signal_start (EV_P_ struct ev_signal *w) 2304ev_signal_start (EV_P_ ev_signal *w)
1501{ 2305{
1502#if EV_MULTIPLICITY 2306#if EV_MULTIPLICITY
1503 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2307 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1504#endif 2308#endif
1505 if (ev_is_active (w)) 2309 if (expect_false (ev_is_active (w)))
1506 return; 2310 return;
1507 2311
1508 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2312 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1509 2313
2314 evpipe_init (EV_A);
2315
2316 EV_FREQUENT_CHECK;
2317
2318 {
2319#ifndef _WIN32
2320 sigset_t full, prev;
2321 sigfillset (&full);
2322 sigprocmask (SIG_SETMASK, &full, &prev);
2323#endif
2324
2325 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2326
2327#ifndef _WIN32
2328 sigprocmask (SIG_SETMASK, &prev, 0);
2329#endif
2330 }
2331
1510 ev_start (EV_A_ (W)w, 1); 2332 ev_start (EV_A_ (W)w, 1);
1511 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1512 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2333 wlist_add (&signals [w->signum - 1].head, (WL)w);
1513 2334
1514 if (!((WL)w)->next) 2335 if (!((WL)w)->next)
1515 { 2336 {
1516#if WIN32 2337#if _WIN32
1517 signal (w->signum, sighandler); 2338 signal (w->signum, ev_sighandler);
1518#else 2339#else
1519 struct sigaction sa; 2340 struct sigaction sa;
1520 sa.sa_handler = sighandler; 2341 sa.sa_handler = ev_sighandler;
1521 sigfillset (&sa.sa_mask); 2342 sigfillset (&sa.sa_mask);
1522 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2343 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1523 sigaction (w->signum, &sa, 0); 2344 sigaction (w->signum, &sa, 0);
1524#endif 2345#endif
1525 } 2346 }
1526}
1527 2347
1528void 2348 EV_FREQUENT_CHECK;
2349}
2350
2351void noinline
1529ev_signal_stop (EV_P_ struct ev_signal *w) 2352ev_signal_stop (EV_P_ ev_signal *w)
1530{ 2353{
1531 ev_clear_pending (EV_A_ (W)w); 2354 clear_pending (EV_A_ (W)w);
1532 if (!ev_is_active (w)) 2355 if (expect_false (!ev_is_active (w)))
1533 return; 2356 return;
1534 2357
2358 EV_FREQUENT_CHECK;
2359
1535 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2360 wlist_del (&signals [w->signum - 1].head, (WL)w);
1536 ev_stop (EV_A_ (W)w); 2361 ev_stop (EV_A_ (W)w);
1537 2362
1538 if (!signals [w->signum - 1].head) 2363 if (!signals [w->signum - 1].head)
1539 signal (w->signum, SIG_DFL); 2364 signal (w->signum, SIG_DFL);
1540}
1541 2365
2366 EV_FREQUENT_CHECK;
2367}
2368
1542void 2369void
1543ev_child_start (EV_P_ struct ev_child *w) 2370ev_child_start (EV_P_ ev_child *w)
1544{ 2371{
1545#if EV_MULTIPLICITY 2372#if EV_MULTIPLICITY
1546 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2373 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1547#endif 2374#endif
1548 if (ev_is_active (w)) 2375 if (expect_false (ev_is_active (w)))
1549 return; 2376 return;
1550 2377
2378 EV_FREQUENT_CHECK;
2379
1551 ev_start (EV_A_ (W)w, 1); 2380 ev_start (EV_A_ (W)w, 1);
1552 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2381 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1553}
1554 2382
2383 EV_FREQUENT_CHECK;
2384}
2385
1555void 2386void
1556ev_child_stop (EV_P_ struct ev_child *w) 2387ev_child_stop (EV_P_ ev_child *w)
1557{ 2388{
1558 ev_clear_pending (EV_A_ (W)w); 2389 clear_pending (EV_A_ (W)w);
1559 if (!ev_is_active (w)) 2390 if (expect_false (!ev_is_active (w)))
1560 return; 2391 return;
1561 2392
2393 EV_FREQUENT_CHECK;
2394
1562 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2395 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1563 ev_stop (EV_A_ (W)w); 2396 ev_stop (EV_A_ (W)w);
2397
2398 EV_FREQUENT_CHECK;
1564} 2399}
2400
2401#if EV_STAT_ENABLE
2402
2403# ifdef _WIN32
2404# undef lstat
2405# define lstat(a,b) _stati64 (a,b)
2406# endif
2407
2408#define DEF_STAT_INTERVAL 5.0074891
2409#define MIN_STAT_INTERVAL 0.1074891
2410
2411static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2412
2413#if EV_USE_INOTIFY
2414# define EV_INOTIFY_BUFSIZE 8192
2415
2416static void noinline
2417infy_add (EV_P_ ev_stat *w)
2418{
2419 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);
2420
2421 if (w->wd < 0)
2422 {
2423 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2424
2425 /* monitor some parent directory for speedup hints */
2426 /* note that exceeding the hardcoded limit is not a correctness issue, */
2427 /* but an efficiency issue only */
2428 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2429 {
2430 char path [4096];
2431 strcpy (path, w->path);
2432
2433 do
2434 {
2435 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2436 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2437
2438 char *pend = strrchr (path, '/');
2439
2440 if (!pend)
2441 break; /* whoops, no '/', complain to your admin */
2442
2443 *pend = 0;
2444 w->wd = inotify_add_watch (fs_fd, path, mask);
2445 }
2446 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2447 }
2448 }
2449 else
2450 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2451
2452 if (w->wd >= 0)
2453 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2454}
2455
2456static void noinline
2457infy_del (EV_P_ ev_stat *w)
2458{
2459 int slot;
2460 int wd = w->wd;
2461
2462 if (wd < 0)
2463 return;
2464
2465 w->wd = -2;
2466 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2467 wlist_del (&fs_hash [slot].head, (WL)w);
2468
2469 /* remove this watcher, if others are watching it, they will rearm */
2470 inotify_rm_watch (fs_fd, wd);
2471}
2472
2473static void noinline
2474infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2475{
2476 if (slot < 0)
2477 /* overflow, need to check for all hahs slots */
2478 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2479 infy_wd (EV_A_ slot, wd, ev);
2480 else
2481 {
2482 WL w_;
2483
2484 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2485 {
2486 ev_stat *w = (ev_stat *)w_;
2487 w_ = w_->next; /* lets us remove this watcher and all before it */
2488
2489 if (w->wd == wd || wd == -1)
2490 {
2491 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2492 {
2493 w->wd = -1;
2494 infy_add (EV_A_ w); /* re-add, no matter what */
2495 }
2496
2497 stat_timer_cb (EV_A_ &w->timer, 0);
2498 }
2499 }
2500 }
2501}
2502
2503static void
2504infy_cb (EV_P_ ev_io *w, int revents)
2505{
2506 char buf [EV_INOTIFY_BUFSIZE];
2507 struct inotify_event *ev = (struct inotify_event *)buf;
2508 int ofs;
2509 int len = read (fs_fd, buf, sizeof (buf));
2510
2511 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2512 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2513}
2514
2515void inline_size
2516infy_init (EV_P)
2517{
2518 if (fs_fd != -2)
2519 return;
2520
2521 fs_fd = inotify_init ();
2522
2523 if (fs_fd >= 0)
2524 {
2525 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2526 ev_set_priority (&fs_w, EV_MAXPRI);
2527 ev_io_start (EV_A_ &fs_w);
2528 }
2529}
2530
2531void inline_size
2532infy_fork (EV_P)
2533{
2534 int slot;
2535
2536 if (fs_fd < 0)
2537 return;
2538
2539 close (fs_fd);
2540 fs_fd = inotify_init ();
2541
2542 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2543 {
2544 WL w_ = fs_hash [slot].head;
2545 fs_hash [slot].head = 0;
2546
2547 while (w_)
2548 {
2549 ev_stat *w = (ev_stat *)w_;
2550 w_ = w_->next; /* lets us add this watcher */
2551
2552 w->wd = -1;
2553
2554 if (fs_fd >= 0)
2555 infy_add (EV_A_ w); /* re-add, no matter what */
2556 else
2557 ev_timer_start (EV_A_ &w->timer);
2558 }
2559
2560 }
2561}
2562
2563#endif
2564
2565void
2566ev_stat_stat (EV_P_ ev_stat *w)
2567{
2568 if (lstat (w->path, &w->attr) < 0)
2569 w->attr.st_nlink = 0;
2570 else if (!w->attr.st_nlink)
2571 w->attr.st_nlink = 1;
2572}
2573
2574static void noinline
2575stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2576{
2577 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2578
2579 /* we copy this here each the time so that */
2580 /* prev has the old value when the callback gets invoked */
2581 w->prev = w->attr;
2582 ev_stat_stat (EV_A_ w);
2583
2584 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2585 if (
2586 w->prev.st_dev != w->attr.st_dev
2587 || w->prev.st_ino != w->attr.st_ino
2588 || w->prev.st_mode != w->attr.st_mode
2589 || w->prev.st_nlink != w->attr.st_nlink
2590 || w->prev.st_uid != w->attr.st_uid
2591 || w->prev.st_gid != w->attr.st_gid
2592 || w->prev.st_rdev != w->attr.st_rdev
2593 || w->prev.st_size != w->attr.st_size
2594 || w->prev.st_atime != w->attr.st_atime
2595 || w->prev.st_mtime != w->attr.st_mtime
2596 || w->prev.st_ctime != w->attr.st_ctime
2597 ) {
2598 #if EV_USE_INOTIFY
2599 infy_del (EV_A_ w);
2600 infy_add (EV_A_ w);
2601 ev_stat_stat (EV_A_ w); /* avoid race... */
2602 #endif
2603
2604 ev_feed_event (EV_A_ w, EV_STAT);
2605 }
2606}
2607
2608void
2609ev_stat_start (EV_P_ ev_stat *w)
2610{
2611 if (expect_false (ev_is_active (w)))
2612 return;
2613
2614 /* since we use memcmp, we need to clear any padding data etc. */
2615 memset (&w->prev, 0, sizeof (ev_statdata));
2616 memset (&w->attr, 0, sizeof (ev_statdata));
2617
2618 ev_stat_stat (EV_A_ w);
2619
2620 if (w->interval < MIN_STAT_INTERVAL)
2621 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2622
2623 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2624 ev_set_priority (&w->timer, ev_priority (w));
2625
2626#if EV_USE_INOTIFY
2627 infy_init (EV_A);
2628
2629 if (fs_fd >= 0)
2630 infy_add (EV_A_ w);
2631 else
2632#endif
2633 ev_timer_start (EV_A_ &w->timer);
2634
2635 ev_start (EV_A_ (W)w, 1);
2636
2637 EV_FREQUENT_CHECK;
2638}
2639
2640void
2641ev_stat_stop (EV_P_ ev_stat *w)
2642{
2643 clear_pending (EV_A_ (W)w);
2644 if (expect_false (!ev_is_active (w)))
2645 return;
2646
2647 EV_FREQUENT_CHECK;
2648
2649#if EV_USE_INOTIFY
2650 infy_del (EV_A_ w);
2651#endif
2652 ev_timer_stop (EV_A_ &w->timer);
2653
2654 ev_stop (EV_A_ (W)w);
2655
2656 EV_FREQUENT_CHECK;
2657}
2658#endif
2659
2660#if EV_IDLE_ENABLE
2661void
2662ev_idle_start (EV_P_ ev_idle *w)
2663{
2664 if (expect_false (ev_is_active (w)))
2665 return;
2666
2667 pri_adjust (EV_A_ (W)w);
2668
2669 EV_FREQUENT_CHECK;
2670
2671 {
2672 int active = ++idlecnt [ABSPRI (w)];
2673
2674 ++idleall;
2675 ev_start (EV_A_ (W)w, active);
2676
2677 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2678 idles [ABSPRI (w)][active - 1] = w;
2679 }
2680
2681 EV_FREQUENT_CHECK;
2682}
2683
2684void
2685ev_idle_stop (EV_P_ ev_idle *w)
2686{
2687 clear_pending (EV_A_ (W)w);
2688 if (expect_false (!ev_is_active (w)))
2689 return;
2690
2691 EV_FREQUENT_CHECK;
2692
2693 {
2694 int active = ev_active (w);
2695
2696 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2697 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2698
2699 ev_stop (EV_A_ (W)w);
2700 --idleall;
2701 }
2702
2703 EV_FREQUENT_CHECK;
2704}
2705#endif
2706
2707void
2708ev_prepare_start (EV_P_ ev_prepare *w)
2709{
2710 if (expect_false (ev_is_active (w)))
2711 return;
2712
2713 EV_FREQUENT_CHECK;
2714
2715 ev_start (EV_A_ (W)w, ++preparecnt);
2716 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2717 prepares [preparecnt - 1] = w;
2718
2719 EV_FREQUENT_CHECK;
2720}
2721
2722void
2723ev_prepare_stop (EV_P_ ev_prepare *w)
2724{
2725 clear_pending (EV_A_ (W)w);
2726 if (expect_false (!ev_is_active (w)))
2727 return;
2728
2729 EV_FREQUENT_CHECK;
2730
2731 {
2732 int active = ev_active (w);
2733
2734 prepares [active - 1] = prepares [--preparecnt];
2735 ev_active (prepares [active - 1]) = active;
2736 }
2737
2738 ev_stop (EV_A_ (W)w);
2739
2740 EV_FREQUENT_CHECK;
2741}
2742
2743void
2744ev_check_start (EV_P_ ev_check *w)
2745{
2746 if (expect_false (ev_is_active (w)))
2747 return;
2748
2749 EV_FREQUENT_CHECK;
2750
2751 ev_start (EV_A_ (W)w, ++checkcnt);
2752 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2753 checks [checkcnt - 1] = w;
2754
2755 EV_FREQUENT_CHECK;
2756}
2757
2758void
2759ev_check_stop (EV_P_ ev_check *w)
2760{
2761 clear_pending (EV_A_ (W)w);
2762 if (expect_false (!ev_is_active (w)))
2763 return;
2764
2765 EV_FREQUENT_CHECK;
2766
2767 {
2768 int active = ev_active (w);
2769
2770 checks [active - 1] = checks [--checkcnt];
2771 ev_active (checks [active - 1]) = active;
2772 }
2773
2774 ev_stop (EV_A_ (W)w);
2775
2776 EV_FREQUENT_CHECK;
2777}
2778
2779#if EV_EMBED_ENABLE
2780void noinline
2781ev_embed_sweep (EV_P_ ev_embed *w)
2782{
2783 ev_loop (w->other, EVLOOP_NONBLOCK);
2784}
2785
2786static void
2787embed_io_cb (EV_P_ ev_io *io, int revents)
2788{
2789 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2790
2791 if (ev_cb (w))
2792 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2793 else
2794 ev_loop (w->other, EVLOOP_NONBLOCK);
2795}
2796
2797static void
2798embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2799{
2800 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2801
2802 {
2803 struct ev_loop *loop = w->other;
2804
2805 while (fdchangecnt)
2806 {
2807 fd_reify (EV_A);
2808 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2809 }
2810 }
2811}
2812
2813#if 0
2814static void
2815embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2816{
2817 ev_idle_stop (EV_A_ idle);
2818}
2819#endif
2820
2821void
2822ev_embed_start (EV_P_ ev_embed *w)
2823{
2824 if (expect_false (ev_is_active (w)))
2825 return;
2826
2827 {
2828 struct ev_loop *loop = w->other;
2829 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2830 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2831 }
2832
2833 EV_FREQUENT_CHECK;
2834
2835 ev_set_priority (&w->io, ev_priority (w));
2836 ev_io_start (EV_A_ &w->io);
2837
2838 ev_prepare_init (&w->prepare, embed_prepare_cb);
2839 ev_set_priority (&w->prepare, EV_MINPRI);
2840 ev_prepare_start (EV_A_ &w->prepare);
2841
2842 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2843
2844 ev_start (EV_A_ (W)w, 1);
2845
2846 EV_FREQUENT_CHECK;
2847}
2848
2849void
2850ev_embed_stop (EV_P_ ev_embed *w)
2851{
2852 clear_pending (EV_A_ (W)w);
2853 if (expect_false (!ev_is_active (w)))
2854 return;
2855
2856 EV_FREQUENT_CHECK;
2857
2858 ev_io_stop (EV_A_ &w->io);
2859 ev_prepare_stop (EV_A_ &w->prepare);
2860
2861 ev_stop (EV_A_ (W)w);
2862
2863 EV_FREQUENT_CHECK;
2864}
2865#endif
2866
2867#if EV_FORK_ENABLE
2868void
2869ev_fork_start (EV_P_ ev_fork *w)
2870{
2871 if (expect_false (ev_is_active (w)))
2872 return;
2873
2874 EV_FREQUENT_CHECK;
2875
2876 ev_start (EV_A_ (W)w, ++forkcnt);
2877 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2878 forks [forkcnt - 1] = w;
2879
2880 EV_FREQUENT_CHECK;
2881}
2882
2883void
2884ev_fork_stop (EV_P_ ev_fork *w)
2885{
2886 clear_pending (EV_A_ (W)w);
2887 if (expect_false (!ev_is_active (w)))
2888 return;
2889
2890 EV_FREQUENT_CHECK;
2891
2892 {
2893 int active = ev_active (w);
2894
2895 forks [active - 1] = forks [--forkcnt];
2896 ev_active (forks [active - 1]) = active;
2897 }
2898
2899 ev_stop (EV_A_ (W)w);
2900
2901 EV_FREQUENT_CHECK;
2902}
2903#endif
2904
2905#if EV_ASYNC_ENABLE
2906void
2907ev_async_start (EV_P_ ev_async *w)
2908{
2909 if (expect_false (ev_is_active (w)))
2910 return;
2911
2912 evpipe_init (EV_A);
2913
2914 EV_FREQUENT_CHECK;
2915
2916 ev_start (EV_A_ (W)w, ++asynccnt);
2917 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2918 asyncs [asynccnt - 1] = w;
2919
2920 EV_FREQUENT_CHECK;
2921}
2922
2923void
2924ev_async_stop (EV_P_ ev_async *w)
2925{
2926 clear_pending (EV_A_ (W)w);
2927 if (expect_false (!ev_is_active (w)))
2928 return;
2929
2930 EV_FREQUENT_CHECK;
2931
2932 {
2933 int active = ev_active (w);
2934
2935 asyncs [active - 1] = asyncs [--asynccnt];
2936 ev_active (asyncs [active - 1]) = active;
2937 }
2938
2939 ev_stop (EV_A_ (W)w);
2940
2941 EV_FREQUENT_CHECK;
2942}
2943
2944void
2945ev_async_send (EV_P_ ev_async *w)
2946{
2947 w->sent = 1;
2948 evpipe_write (EV_A_ &gotasync);
2949}
2950#endif
1565 2951
1566/*****************************************************************************/ 2952/*****************************************************************************/
1567 2953
1568struct ev_once 2954struct ev_once
1569{ 2955{
1570 struct ev_io io; 2956 ev_io io;
1571 struct ev_timer to; 2957 ev_timer to;
1572 void (*cb)(int revents, void *arg); 2958 void (*cb)(int revents, void *arg);
1573 void *arg; 2959 void *arg;
1574}; 2960};
1575 2961
1576static void 2962static void
… …
1585 2971
1586 cb (revents, arg); 2972 cb (revents, arg);
1587} 2973}
1588 2974
1589static void 2975static void
1590once_cb_io (EV_P_ struct ev_io *w, int revents) 2976once_cb_io (EV_P_ ev_io *w, int revents)
1591{ 2977{
1592 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2978 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1593} 2979}
1594 2980
1595static void 2981static void
1596once_cb_to (EV_P_ struct ev_timer *w, int revents) 2982once_cb_to (EV_P_ ev_timer *w, int revents)
1597{ 2983{
1598 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2984 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1599} 2985}
1600 2986
1601void 2987void
1602ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2988ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1603{ 2989{
1604 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 2990 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1605 2991
1606 if (!once) 2992 if (expect_false (!once))
2993 {
1607 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2994 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1608 else 2995 return;
1609 { 2996 }
2997
1610 once->cb = cb; 2998 once->cb = cb;
1611 once->arg = arg; 2999 once->arg = arg;
1612 3000
1613 ev_init (&once->io, once_cb_io); 3001 ev_init (&once->io, once_cb_io);
1614 if (fd >= 0) 3002 if (fd >= 0)
1615 { 3003 {
1616 ev_io_set (&once->io, fd, events); 3004 ev_io_set (&once->io, fd, events);
1617 ev_io_start (EV_A_ &once->io); 3005 ev_io_start (EV_A_ &once->io);
1618 } 3006 }
1619 3007
1620 ev_init (&once->to, once_cb_to); 3008 ev_init (&once->to, once_cb_to);
1621 if (timeout >= 0.) 3009 if (timeout >= 0.)
1622 { 3010 {
1623 ev_timer_set (&once->to, timeout, 0.); 3011 ev_timer_set (&once->to, timeout, 0.);
1624 ev_timer_start (EV_A_ &once->to); 3012 ev_timer_start (EV_A_ &once->to);
1625 }
1626 } 3013 }
1627} 3014}
3015
3016#if EV_MULTIPLICITY
3017 #include "ev_wrap.h"
3018#endif
1628 3019
1629#ifdef __cplusplus 3020#ifdef __cplusplus
1630} 3021}
1631#endif 3022#endif
1632 3023

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