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Comparing libev/ev.c (file contents):
Revision 1.102 by root, Sun Nov 11 17:56:11 2007 UTC vs.
Revision 1.255 by root, Mon Jun 9 14:11:30 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_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# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
170# define EV_USE_MONOTONIC 1
171# else
172# define EV_USE_MONOTONIC 0
173# endif
174#endif
175
176#ifndef EV_USE_REALTIME
177# define EV_USE_REALTIME 0
178#endif
179
180#ifndef EV_USE_NANOSLEEP
181# if _POSIX_C_SOURCE >= 199309L
182# define EV_USE_NANOSLEEP 1
183# else
184# define EV_USE_NANOSLEEP 0
185# endif
186#endif
187
188#ifndef EV_USE_SELECT
189# define EV_USE_SELECT 1
190#endif
191
192#ifndef EV_USE_POLL
193# ifdef _WIN32
194# define EV_USE_POLL 0
195# else
196# define EV_USE_POLL 1
197# endif
198#endif
199
200#ifndef EV_USE_EPOLL
201# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
202# define EV_USE_EPOLL 1
203# else
204# define EV_USE_EPOLL 0
205# endif
206#endif
207
208#ifndef EV_USE_KQUEUE
209# define EV_USE_KQUEUE 0
210#endif
211
212#ifndef EV_USE_PORT
213# define EV_USE_PORT 0
214#endif
215
216#ifndef EV_USE_INOTIFY
217# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
218# define EV_USE_INOTIFY 1
219# else
220# define EV_USE_INOTIFY 0
221# endif
222#endif
223
224#ifndef EV_PID_HASHSIZE
225# if EV_MINIMAL
226# define EV_PID_HASHSIZE 1
227# else
228# define EV_PID_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_INOTIFY_HASHSIZE
233# if EV_MINIMAL
234# define EV_INOTIFY_HASHSIZE 1
235# else
236# define EV_INOTIFY_HASHSIZE 16
237# endif
238#endif
239
240#ifndef EV_USE_EVENTFD
241# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
242# define EV_USE_EVENTFD 1
243# else
244# define EV_USE_EVENTFD 0
245# endif
246#endif
247
248#if 0 /* debugging */
249# define EV_VERIFY 3
250# define EV_USE_4HEAP 1
251# define EV_HEAP_CACHE_AT 1
252#endif
253
254#ifndef EV_VERIFY
255# define EV_VERIFY !EV_MINIMAL
256#endif
257
258#ifndef EV_USE_4HEAP
259# define EV_USE_4HEAP !EV_MINIMAL
260#endif
261
262#ifndef EV_HEAP_CACHE_AT
263# define EV_HEAP_CACHE_AT !EV_MINIMAL
264#endif
265
266/* this block fixes any misconfiguration where we know we run into trouble otherwise */
267
268#ifndef CLOCK_MONOTONIC
269# undef EV_USE_MONOTONIC
270# define EV_USE_MONOTONIC 0
271#endif
272
273#ifndef CLOCK_REALTIME
274# undef EV_USE_REALTIME
275# define EV_USE_REALTIME 0
276#endif
277
278#if !EV_STAT_ENABLE
279# undef EV_USE_INOTIFY
280# define EV_USE_INOTIFY 0
281#endif
282
283#if !EV_USE_NANOSLEEP
284# ifndef _WIN32
285# include <sys/select.h>
286# endif
287#endif
288
289#if EV_USE_INOTIFY
290# include <sys/inotify.h>
291#endif
292
293#if EV_SELECT_IS_WINSOCKET
294# include <winsock.h>
295#endif
296
297#if EV_USE_EVENTFD
298/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
299# include <stdint.h>
300# ifdef __cplusplus
301extern "C" {
302# endif
303int eventfd (unsigned int initval, int flags);
304# ifdef __cplusplus
305}
306# endif
307#endif
308
309/**/
310
311#if EV_VERIFY >= 3
312# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
313#else
314# define EV_FREQUENT_CHECK do { } while (0)
315#endif
316
317/*
318 * This is used to avoid floating point rounding problems.
319 * It is added to ev_rt_now when scheduling periodics
320 * to ensure progress, time-wise, even when rounding
321 * errors are against us.
322 * This value is good at least till the year 4000.
323 * Better solutions welcome.
324 */
325#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
326
327#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
328#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
329/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
330
146#if __GNUC__ >= 3 331#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 332# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 333# define noinline __attribute__ ((noinline))
149#else 334#else
150# define expect(expr,value) (expr) 335# define expect(expr,value) (expr)
151# define inline static 336# define noinline
337# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
338# define inline
339# endif
152#endif 340#endif
153 341
154#define expect_false(expr) expect ((expr) != 0, 0) 342#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 343#define expect_true(expr) expect ((expr) != 0, 1)
344#define inline_size static inline
345
346#if EV_MINIMAL
347# define inline_speed static noinline
348#else
349# define inline_speed static inline
350#endif
156 351
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 352#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 353#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
159 354
355#define EMPTY /* required for microsofts broken pseudo-c compiler */
356#define EMPTY2(a,b) /* used to suppress some warnings */
357
160typedef struct ev_watcher *W; 358typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 359typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 360typedef ev_watcher_time *WT;
163 361
362#define ev_active(w) ((W)(w))->active
363#define ev_at(w) ((WT)(w))->at
364
365#if EV_USE_MONOTONIC
366/* sig_atomic_t is used to avoid per-thread variables or locking but still */
367/* giving it a reasonably high chance of working on typical architetcures */
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 368static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
369#endif
165 370
166#ifdef WIN32 371#ifdef _WIN32
167# include "ev_win32.c" 372# include "ev_win32.c"
168#endif 373#endif
169 374
170/*****************************************************************************/ 375/*****************************************************************************/
171 376
172static void (*syserr_cb)(const char *msg); 377static void (*syserr_cb)(const char *msg);
173 378
379void
174void ev_set_syserr_cb (void (*cb)(const char *msg)) 380ev_set_syserr_cb (void (*cb)(const char *msg))
175{ 381{
176 syserr_cb = cb; 382 syserr_cb = cb;
177} 383}
178 384
179static void 385static void noinline
180syserr (const char *msg) 386syserr (const char *msg)
181{ 387{
182 if (!msg) 388 if (!msg)
183 msg = "(libev) system error"; 389 msg = "(libev) system error";
184 390
… …
189 perror (msg); 395 perror (msg);
190 abort (); 396 abort ();
191 } 397 }
192} 398}
193 399
400static void *
401ev_realloc_emul (void *ptr, long size)
402{
403 /* some systems, notably openbsd and darwin, fail to properly
404 * implement realloc (x, 0) (as required by both ansi c-98 and
405 * the single unix specification, so work around them here.
406 */
407
408 if (size)
409 return realloc (ptr, size);
410
411 free (ptr);
412 return 0;
413}
414
194static void *(*alloc)(void *ptr, long size); 415static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195 416
417void
196void ev_set_allocator (void *(*cb)(void *ptr, long size)) 418ev_set_allocator (void *(*cb)(void *ptr, long size))
197{ 419{
198 alloc = cb; 420 alloc = cb;
199} 421}
200 422
201static void * 423inline_speed void *
202ev_realloc (void *ptr, long size) 424ev_realloc (void *ptr, long size)
203{ 425{
204 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 426 ptr = alloc (ptr, size);
205 427
206 if (!ptr && size) 428 if (!ptr && size)
207 { 429 {
208 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 430 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
209 abort (); 431 abort ();
… …
220typedef struct 442typedef struct
221{ 443{
222 WL head; 444 WL head;
223 unsigned char events; 445 unsigned char events;
224 unsigned char reify; 446 unsigned char reify;
447#if EV_SELECT_IS_WINSOCKET
448 SOCKET handle;
449#endif
225} ANFD; 450} ANFD;
226 451
227typedef struct 452typedef struct
228{ 453{
229 W w; 454 W w;
230 int events; 455 int events;
231} ANPENDING; 456} ANPENDING;
457
458#if EV_USE_INOTIFY
459/* hash table entry per inotify-id */
460typedef struct
461{
462 WL head;
463} ANFS;
464#endif
465
466/* Heap Entry */
467#if EV_HEAP_CACHE_AT
468 typedef struct {
469 ev_tstamp at;
470 WT w;
471 } ANHE;
472
473 #define ANHE_w(he) (he).w /* access watcher, read-write */
474 #define ANHE_at(he) (he).at /* access cached at, read-only */
475 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
476#else
477 typedef WT ANHE;
478
479 #define ANHE_w(he) (he)
480 #define ANHE_at(he) (he)->at
481 #define ANHE_at_cache(he)
482#endif
232 483
233#if EV_MULTIPLICITY 484#if EV_MULTIPLICITY
234 485
235 struct ev_loop 486 struct ev_loop
236 { 487 {
… …
240 #include "ev_vars.h" 491 #include "ev_vars.h"
241 #undef VAR 492 #undef VAR
242 }; 493 };
243 #include "ev_wrap.h" 494 #include "ev_wrap.h"
244 495
245 struct ev_loop default_loop_struct; 496 static struct ev_loop default_loop_struct;
246 static struct ev_loop *default_loop; 497 struct ev_loop *ev_default_loop_ptr;
247 498
248#else 499#else
249 500
250 ev_tstamp ev_rt_now; 501 ev_tstamp ev_rt_now;
251 #define VAR(name,decl) static decl; 502 #define VAR(name,decl) static decl;
252 #include "ev_vars.h" 503 #include "ev_vars.h"
253 #undef VAR 504 #undef VAR
254 505
255 static int default_loop; 506 static int ev_default_loop_ptr;
256 507
257#endif 508#endif
258 509
259/*****************************************************************************/ 510/*****************************************************************************/
260 511
… …
270 gettimeofday (&tv, 0); 521 gettimeofday (&tv, 0);
271 return tv.tv_sec + tv.tv_usec * 1e-6; 522 return tv.tv_sec + tv.tv_usec * 1e-6;
272#endif 523#endif
273} 524}
274 525
275inline ev_tstamp 526ev_tstamp inline_size
276get_clock (void) 527get_clock (void)
277{ 528{
278#if EV_USE_MONOTONIC 529#if EV_USE_MONOTONIC
279 if (expect_true (have_monotonic)) 530 if (expect_true (have_monotonic))
280 { 531 {
… …
293{ 544{
294 return ev_rt_now; 545 return ev_rt_now;
295} 546}
296#endif 547#endif
297 548
298#define array_roundsize(type,n) ((n) | 4 & ~3) 549void
550ev_sleep (ev_tstamp delay)
551{
552 if (delay > 0.)
553 {
554#if EV_USE_NANOSLEEP
555 struct timespec ts;
556
557 ts.tv_sec = (time_t)delay;
558 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
559
560 nanosleep (&ts, 0);
561#elif defined(_WIN32)
562 Sleep ((unsigned long)(delay * 1e3));
563#else
564 struct timeval tv;
565
566 tv.tv_sec = (time_t)delay;
567 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
568
569 select (0, 0, 0, 0, &tv);
570#endif
571 }
572}
573
574/*****************************************************************************/
575
576#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
577
578int inline_size
579array_nextsize (int elem, int cur, int cnt)
580{
581 int ncur = cur + 1;
582
583 do
584 ncur <<= 1;
585 while (cnt > ncur);
586
587 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
588 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
589 {
590 ncur *= elem;
591 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
592 ncur = ncur - sizeof (void *) * 4;
593 ncur /= elem;
594 }
595
596 return ncur;
597}
598
599static noinline void *
600array_realloc (int elem, void *base, int *cur, int cnt)
601{
602 *cur = array_nextsize (elem, *cur, cnt);
603 return ev_realloc (base, elem * *cur);
604}
299 605
300#define array_needsize(type,base,cur,cnt,init) \ 606#define array_needsize(type,base,cur,cnt,init) \
301 if (expect_false ((cnt) > cur)) \ 607 if (expect_false ((cnt) > (cur))) \
302 { \ 608 { \
303 int newcnt = cur; \ 609 int ocur_ = (cur); \
304 do \ 610 (base) = (type *)array_realloc \
305 { \ 611 (sizeof (type), (base), &(cur), (cnt)); \
306 newcnt = array_roundsize (type, newcnt << 1); \ 612 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 } 613 }
314 614
615#if 0
315#define array_slim(type,stem) \ 616#define array_slim(type,stem) \
316 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 617 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
317 { \ 618 { \
318 stem ## max = array_roundsize (stem ## cnt >> 1); \ 619 stem ## max = array_roundsize (stem ## cnt >> 1); \
319 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 620 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
320 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 621 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
321 } 622 }
322 623#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;
327 624
328#define array_free(stem, idx) \ 625#define array_free(stem, idx) \
329 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 626 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
330 627
331/*****************************************************************************/ 628/*****************************************************************************/
332 629
333static void 630void noinline
631ev_feed_event (EV_P_ void *w, int revents)
632{
633 W w_ = (W)w;
634 int pri = ABSPRI (w_);
635
636 if (expect_false (w_->pending))
637 pendings [pri][w_->pending - 1].events |= revents;
638 else
639 {
640 w_->pending = ++pendingcnt [pri];
641 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
642 pendings [pri][w_->pending - 1].w = w_;
643 pendings [pri][w_->pending - 1].events = revents;
644 }
645}
646
647void inline_speed
648queue_events (EV_P_ W *events, int eventcnt, int type)
649{
650 int i;
651
652 for (i = 0; i < eventcnt; ++i)
653 ev_feed_event (EV_A_ events [i], type);
654}
655
656/*****************************************************************************/
657
658void inline_size
334anfds_init (ANFD *base, int count) 659anfds_init (ANFD *base, int count)
335{ 660{
336 while (count--) 661 while (count--)
337 { 662 {
338 base->head = 0; 663 base->head = 0;
… …
341 666
342 ++base; 667 ++base;
343 } 668 }
344} 669}
345 670
346void 671void 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) 672fd_event (EV_P_ int fd, int revents)
374{ 673{
375 ANFD *anfd = anfds + fd; 674 ANFD *anfd = anfds + fd;
376 struct ev_io *w; 675 ev_io *w;
377 676
378 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 677 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
379 { 678 {
380 int ev = w->events & revents; 679 int ev = w->events & revents;
381 680
382 if (ev) 681 if (ev)
383 ev_feed_event (EV_A_ (W)w, ev); 682 ev_feed_event (EV_A_ (W)w, ev);
… …
385} 684}
386 685
387void 686void
388ev_feed_fd_event (EV_P_ int fd, int revents) 687ev_feed_fd_event (EV_P_ int fd, int revents)
389{ 688{
689 if (fd >= 0 && fd < anfdmax)
390 fd_event (EV_A_ fd, revents); 690 fd_event (EV_A_ fd, revents);
391} 691}
392 692
393/*****************************************************************************/ 693void inline_size
394
395static void
396fd_reify (EV_P) 694fd_reify (EV_P)
397{ 695{
398 int i; 696 int i;
399 697
400 for (i = 0; i < fdchangecnt; ++i) 698 for (i = 0; i < fdchangecnt; ++i)
401 { 699 {
402 int fd = fdchanges [i]; 700 int fd = fdchanges [i];
403 ANFD *anfd = anfds + fd; 701 ANFD *anfd = anfds + fd;
404 struct ev_io *w; 702 ev_io *w;
405 703
406 int events = 0; 704 unsigned char events = 0;
407 705
408 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 706 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
409 events |= w->events; 707 events |= (unsigned char)w->events;
410 708
709#if EV_SELECT_IS_WINSOCKET
710 if (events)
711 {
712 unsigned long arg;
713 #ifdef EV_FD_TO_WIN32_HANDLE
714 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
715 #else
716 anfd->handle = _get_osfhandle (fd);
717 #endif
718 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
719 }
720#endif
721
722 {
723 unsigned char o_events = anfd->events;
724 unsigned char o_reify = anfd->reify;
725
411 anfd->reify = 0; 726 anfd->reify = 0;
412
413 method_modify (EV_A_ fd, anfd->events, events);
414 anfd->events = events; 727 anfd->events = events;
728
729 if (o_events != events || o_reify & EV_IOFDSET)
730 backend_modify (EV_A_ fd, o_events, events);
731 }
415 } 732 }
416 733
417 fdchangecnt = 0; 734 fdchangecnt = 0;
418} 735}
419 736
420static void 737void inline_size
421fd_change (EV_P_ int fd) 738fd_change (EV_P_ int fd, int flags)
422{ 739{
423 if (anfds [fd].reify) 740 unsigned char reify = anfds [fd].reify;
424 return;
425
426 anfds [fd].reify = 1; 741 anfds [fd].reify |= flags;
427 742
743 if (expect_true (!reify))
744 {
428 ++fdchangecnt; 745 ++fdchangecnt;
429 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 746 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
430 fdchanges [fdchangecnt - 1] = fd; 747 fdchanges [fdchangecnt - 1] = fd;
748 }
431} 749}
432 750
433static void 751void inline_speed
434fd_kill (EV_P_ int fd) 752fd_kill (EV_P_ int fd)
435{ 753{
436 struct ev_io *w; 754 ev_io *w;
437 755
438 while ((w = (struct ev_io *)anfds [fd].head)) 756 while ((w = (ev_io *)anfds [fd].head))
439 { 757 {
440 ev_io_stop (EV_A_ w); 758 ev_io_stop (EV_A_ w);
441 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 759 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
442 } 760 }
443} 761}
444 762
445static int 763int inline_size
446fd_valid (int fd) 764fd_valid (int fd)
447{ 765{
448#ifdef WIN32 766#ifdef _WIN32
449 return !!win32_get_osfhandle (fd); 767 return _get_osfhandle (fd) != -1;
450#else 768#else
451 return fcntl (fd, F_GETFD) != -1; 769 return fcntl (fd, F_GETFD) != -1;
452#endif 770#endif
453} 771}
454 772
455/* called on EBADF to verify fds */ 773/* called on EBADF to verify fds */
456static void 774static void noinline
457fd_ebadf (EV_P) 775fd_ebadf (EV_P)
458{ 776{
459 int fd; 777 int fd;
460 778
461 for (fd = 0; fd < anfdmax; ++fd) 779 for (fd = 0; fd < anfdmax; ++fd)
462 if (anfds [fd].events) 780 if (anfds [fd].events)
463 if (!fd_valid (fd) == -1 && errno == EBADF) 781 if (!fd_valid (fd) && errno == EBADF)
464 fd_kill (EV_A_ fd); 782 fd_kill (EV_A_ fd);
465} 783}
466 784
467/* called on ENOMEM in select/poll to kill some fds and retry */ 785/* called on ENOMEM in select/poll to kill some fds and retry */
468static void 786static void noinline
469fd_enomem (EV_P) 787fd_enomem (EV_P)
470{ 788{
471 int fd; 789 int fd;
472 790
473 for (fd = anfdmax; fd--; ) 791 for (fd = anfdmax; fd--; )
… …
476 fd_kill (EV_A_ fd); 794 fd_kill (EV_A_ fd);
477 return; 795 return;
478 } 796 }
479} 797}
480 798
481/* usually called after fork if method needs to re-arm all fds from scratch */ 799/* usually called after fork if backend needs to re-arm all fds from scratch */
482static void 800static void noinline
483fd_rearm_all (EV_P) 801fd_rearm_all (EV_P)
484{ 802{
485 int fd; 803 int fd;
486 804
487 /* this should be highly optimised to not do anything but set a flag */
488 for (fd = 0; fd < anfdmax; ++fd) 805 for (fd = 0; fd < anfdmax; ++fd)
489 if (anfds [fd].events) 806 if (anfds [fd].events)
490 { 807 {
491 anfds [fd].events = 0; 808 anfds [fd].events = 0;
492 fd_change (EV_A_ fd); 809 fd_change (EV_A_ fd, EV_IOFDSET | 1);
493 } 810 }
494} 811}
495 812
496/*****************************************************************************/ 813/*****************************************************************************/
497 814
498static void 815/*
499upheap (WT *heap, int k) 816 * the heap functions want a real array index. array index 0 uis guaranteed to not
500{ 817 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
501 WT w = heap [k]; 818 * the branching factor of the d-tree.
819 */
502 820
503 while (k && heap [k >> 1]->at > w->at) 821/*
504 { 822 * at the moment we allow libev the luxury of two heaps,
505 heap [k] = heap [k >> 1]; 823 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
506 ((W)heap [k])->active = k + 1; 824 * which is more cache-efficient.
507 k >>= 1; 825 * the difference is about 5% with 50000+ watchers.
508 } 826 */
827#if EV_USE_4HEAP
509 828
510 heap [k] = w; 829#define DHEAP 4
511 ((W)heap [k])->active = k + 1; 830#define HEAP0 (DHEAP - 1) /* index of first element in heap */
831#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
832#define UPHEAP_DONE(p,k) ((p) == (k))
512 833
513} 834/* away from the root */
514 835void inline_speed
515static void
516downheap (WT *heap, int N, int k) 836downheap (ANHE *heap, int N, int k)
517{ 837{
518 WT w = heap [k]; 838 ANHE he = heap [k];
839 ANHE *E = heap + N + HEAP0;
519 840
520 while (k < (N >> 1)) 841 for (;;)
521 { 842 {
522 int j = k << 1; 843 ev_tstamp minat;
844 ANHE *minpos;
845 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
523 846
524 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 847 /* find minimum child */
848 if (expect_true (pos + DHEAP - 1 < E))
525 ++j; 849 {
526 850 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
527 if (w->at <= heap [j]->at) 851 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
852 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
853 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
854 }
855 else if (pos < E)
856 {
857 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
858 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
859 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
860 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
861 }
862 else
528 break; 863 break;
529 864
865 if (ANHE_at (he) <= minat)
866 break;
867
868 heap [k] = *minpos;
869 ev_active (ANHE_w (*minpos)) = k;
870
871 k = minpos - heap;
872 }
873
874 heap [k] = he;
875 ev_active (ANHE_w (he)) = k;
876}
877
878#else /* 4HEAP */
879
880#define HEAP0 1
881#define HPARENT(k) ((k) >> 1)
882#define UPHEAP_DONE(p,k) (!(p))
883
884/* away from the root */
885void inline_speed
886downheap (ANHE *heap, int N, int k)
887{
888 ANHE he = heap [k];
889
890 for (;;)
891 {
892 int c = k << 1;
893
894 if (c > N + HEAP0 - 1)
895 break;
896
897 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
898 ? 1 : 0;
899
900 if (ANHE_at (he) <= ANHE_at (heap [c]))
901 break;
902
530 heap [k] = heap [j]; 903 heap [k] = heap [c];
531 ((W)heap [k])->active = k + 1; 904 ev_active (ANHE_w (heap [k])) = k;
905
532 k = j; 906 k = c;
533 } 907 }
534 908
535 heap [k] = w; 909 heap [k] = he;
536 ((W)heap [k])->active = k + 1; 910 ev_active (ANHE_w (he)) = k;
537} 911}
912#endif
538 913
539inline void 914/* towards the root */
915void inline_speed
916upheap (ANHE *heap, int k)
917{
918 ANHE he = heap [k];
919
920 for (;;)
921 {
922 int p = HPARENT (k);
923
924 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
925 break;
926
927 heap [k] = heap [p];
928 ev_active (ANHE_w (heap [k])) = k;
929 k = p;
930 }
931
932 heap [k] = he;
933 ev_active (ANHE_w (he)) = k;
934}
935
936void inline_size
540adjustheap (WT *heap, int N, int k) 937adjustheap (ANHE *heap, int N, int k)
541{ 938{
939 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
542 upheap (heap, k); 940 upheap (heap, k);
941 else
543 downheap (heap, N, k); 942 downheap (heap, N, k);
943}
944
945/* rebuild the heap: this function is used only once and executed rarely */
946void inline_size
947reheap (ANHE *heap, int N)
948{
949 int i;
950
951 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
952 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
953 for (i = 0; i < N; ++i)
954 upheap (heap, i + HEAP0);
544} 955}
545 956
546/*****************************************************************************/ 957/*****************************************************************************/
547 958
548typedef struct 959typedef struct
549{ 960{
550 WL head; 961 WL head;
551 sig_atomic_t volatile gotsig; 962 EV_ATOMIC_T gotsig;
552} ANSIG; 963} ANSIG;
553 964
554static ANSIG *signals; 965static ANSIG *signals;
555static int signalmax; 966static int signalmax;
556 967
557static int sigpipe [2]; 968static EV_ATOMIC_T gotsig;
558static sig_atomic_t volatile gotsig;
559static struct ev_io sigev;
560 969
561static void 970void inline_size
562signals_init (ANSIG *base, int count) 971signals_init (ANSIG *base, int count)
563{ 972{
564 while (count--) 973 while (count--)
565 { 974 {
566 base->head = 0; 975 base->head = 0;
… …
568 977
569 ++base; 978 ++base;
570 } 979 }
571} 980}
572 981
982/*****************************************************************************/
983
984void inline_speed
985fd_intern (int fd)
986{
987#ifdef _WIN32
988 unsigned long arg = 1;
989 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
990#else
991 fcntl (fd, F_SETFD, FD_CLOEXEC);
992 fcntl (fd, F_SETFL, O_NONBLOCK);
993#endif
994}
995
996static void noinline
997evpipe_init (EV_P)
998{
999 if (!ev_is_active (&pipeev))
1000 {
1001#if EV_USE_EVENTFD
1002 if ((evfd = eventfd (0, 0)) >= 0)
1003 {
1004 evpipe [0] = -1;
1005 fd_intern (evfd);
1006 ev_io_set (&pipeev, evfd, EV_READ);
1007 }
1008 else
1009#endif
1010 {
1011 while (pipe (evpipe))
1012 syserr ("(libev) error creating signal/async pipe");
1013
1014 fd_intern (evpipe [0]);
1015 fd_intern (evpipe [1]);
1016 ev_io_set (&pipeev, evpipe [0], EV_READ);
1017 }
1018
1019 ev_io_start (EV_A_ &pipeev);
1020 ev_unref (EV_A); /* watcher should not keep loop alive */
1021 }
1022}
1023
1024void inline_size
1025evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1026{
1027 if (!*flag)
1028 {
1029 int old_errno = errno; /* save errno because write might clobber it */
1030
1031 *flag = 1;
1032
1033#if EV_USE_EVENTFD
1034 if (evfd >= 0)
1035 {
1036 uint64_t counter = 1;
1037 write (evfd, &counter, sizeof (uint64_t));
1038 }
1039 else
1040#endif
1041 write (evpipe [1], &old_errno, 1);
1042
1043 errno = old_errno;
1044 }
1045}
1046
573static void 1047static void
1048pipecb (EV_P_ ev_io *iow, int revents)
1049{
1050#if EV_USE_EVENTFD
1051 if (evfd >= 0)
1052 {
1053 uint64_t counter;
1054 read (evfd, &counter, sizeof (uint64_t));
1055 }
1056 else
1057#endif
1058 {
1059 char dummy;
1060 read (evpipe [0], &dummy, 1);
1061 }
1062
1063 if (gotsig && ev_is_default_loop (EV_A))
1064 {
1065 int signum;
1066 gotsig = 0;
1067
1068 for (signum = signalmax; signum--; )
1069 if (signals [signum].gotsig)
1070 ev_feed_signal_event (EV_A_ signum + 1);
1071 }
1072
1073#if EV_ASYNC_ENABLE
1074 if (gotasync)
1075 {
1076 int i;
1077 gotasync = 0;
1078
1079 for (i = asynccnt; i--; )
1080 if (asyncs [i]->sent)
1081 {
1082 asyncs [i]->sent = 0;
1083 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1084 }
1085 }
1086#endif
1087}
1088
1089/*****************************************************************************/
1090
1091static void
574sighandler (int signum) 1092ev_sighandler (int signum)
575{ 1093{
1094#if EV_MULTIPLICITY
1095 struct ev_loop *loop = &default_loop_struct;
1096#endif
1097
576#if WIN32 1098#if _WIN32
577 signal (signum, sighandler); 1099 signal (signum, ev_sighandler);
578#endif 1100#endif
579 1101
580 signals [signum - 1].gotsig = 1; 1102 signals [signum - 1].gotsig = 1;
581 1103 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} 1104}
594 1105
595void 1106void noinline
596ev_feed_signal_event (EV_P_ int signum) 1107ev_feed_signal_event (EV_P_ int signum)
597{ 1108{
598 WL w; 1109 WL w;
599 1110
600#if EV_MULTIPLICITY 1111#if EV_MULTIPLICITY
601 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1112 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
602#endif 1113#endif
603 1114
604 --signum; 1115 --signum;
605 1116
606 if (signum < 0 || signum >= signalmax) 1117 if (signum < 0 || signum >= signalmax)
… …
610 1121
611 for (w = signals [signum].head; w; w = w->next) 1122 for (w = signals [signum].head; w; w = w->next)
612 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1123 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
613} 1124}
614 1125
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/*****************************************************************************/ 1126/*****************************************************************************/
650 1127
651static struct ev_child *childs [PID_HASHSIZE]; 1128static WL childs [EV_PID_HASHSIZE];
652 1129
653#ifndef WIN32 1130#ifndef _WIN32
654 1131
655static struct ev_signal childev; 1132static ev_signal childev;
1133
1134#ifndef WIFCONTINUED
1135# define WIFCONTINUED(status) 0
1136#endif
1137
1138void inline_speed
1139child_reap (EV_P_ int chain, int pid, int status)
1140{
1141 ev_child *w;
1142 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1143
1144 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1145 {
1146 if ((w->pid == pid || !w->pid)
1147 && (!traced || (w->flags & 1)))
1148 {
1149 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1150 w->rpid = pid;
1151 w->rstatus = status;
1152 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1153 }
1154 }
1155}
656 1156
657#ifndef WCONTINUED 1157#ifndef WCONTINUED
658# define WCONTINUED 0 1158# define WCONTINUED 0
659#endif 1159#endif
660 1160
661static void 1161static 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) 1162childcb (EV_P_ ev_signal *sw, int revents)
678{ 1163{
679 int pid, status; 1164 int pid, status;
680 1165
1166 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
681 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1167 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
682 { 1168 if (!WCONTINUED
1169 || errno != EINVAL
1170 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1171 return;
1172
683 /* make sure we are called again until all childs have been reaped */ 1173 /* make sure we are called again until all children have been reaped */
1174 /* 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); 1175 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
685 1176
686 child_reap (EV_A_ sw, pid, pid, status); 1177 child_reap (EV_A_ pid, pid, status);
1178 if (EV_PID_HASHSIZE > 1)
687 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1179 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
688 }
689} 1180}
690 1181
691#endif 1182#endif
692 1183
693/*****************************************************************************/ 1184/*****************************************************************************/
694 1185
1186#if EV_USE_PORT
1187# include "ev_port.c"
1188#endif
695#if EV_USE_KQUEUE 1189#if EV_USE_KQUEUE
696# include "ev_kqueue.c" 1190# include "ev_kqueue.c"
697#endif 1191#endif
698#if EV_USE_EPOLL 1192#if EV_USE_EPOLL
699# include "ev_epoll.c" 1193# include "ev_epoll.c"
… …
716{ 1210{
717 return EV_VERSION_MINOR; 1211 return EV_VERSION_MINOR;
718} 1212}
719 1213
720/* return true if we are running with elevated privileges and should ignore env variables */ 1214/* return true if we are running with elevated privileges and should ignore env variables */
721static int 1215int inline_size
722enable_secure (void) 1216enable_secure (void)
723{ 1217{
724#ifdef WIN32 1218#ifdef _WIN32
725 return 0; 1219 return 0;
726#else 1220#else
727 return getuid () != geteuid () 1221 return getuid () != geteuid ()
728 || getgid () != getegid (); 1222 || getgid () != getegid ();
729#endif 1223#endif
730} 1224}
731 1225
732int 1226unsigned int
733ev_method (EV_P) 1227ev_supported_backends (void)
734{ 1228{
735 return method; 1229 unsigned int flags = 0;
736}
737 1230
738static void 1231 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
739loop_init (EV_P_ int methods) 1232 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1233 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1234 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1235 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1236
1237 return flags;
1238}
1239
1240unsigned int
1241ev_recommended_backends (void)
740{ 1242{
741 if (!method) 1243 unsigned int flags = ev_supported_backends ();
1244
1245#ifndef __NetBSD__
1246 /* kqueue is borked on everything but netbsd apparently */
1247 /* it usually doesn't work correctly on anything but sockets and pipes */
1248 flags &= ~EVBACKEND_KQUEUE;
1249#endif
1250#ifdef __APPLE__
1251 // flags &= ~EVBACKEND_KQUEUE; for documentation
1252 flags &= ~EVBACKEND_POLL;
1253#endif
1254
1255 return flags;
1256}
1257
1258unsigned int
1259ev_embeddable_backends (void)
1260{
1261 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1262
1263 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1264 /* please fix it and tell me how to detect the fix */
1265 flags &= ~EVBACKEND_EPOLL;
1266
1267 return flags;
1268}
1269
1270unsigned int
1271ev_backend (EV_P)
1272{
1273 return backend;
1274}
1275
1276unsigned int
1277ev_loop_count (EV_P)
1278{
1279 return loop_count;
1280}
1281
1282void
1283ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1284{
1285 io_blocktime = interval;
1286}
1287
1288void
1289ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1290{
1291 timeout_blocktime = interval;
1292}
1293
1294static void noinline
1295loop_init (EV_P_ unsigned int flags)
1296{
1297 if (!backend)
742 { 1298 {
743#if EV_USE_MONOTONIC 1299#if EV_USE_MONOTONIC
744 { 1300 {
745 struct timespec ts; 1301 struct timespec ts;
746 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1302 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
747 have_monotonic = 1; 1303 have_monotonic = 1;
748 } 1304 }
749#endif 1305#endif
750 1306
751 ev_rt_now = ev_time (); 1307 ev_rt_now = ev_time ();
752 mn_now = get_clock (); 1308 mn_now = get_clock ();
753 now_floor = mn_now; 1309 now_floor = mn_now;
754 rtmn_diff = ev_rt_now - mn_now; 1310 rtmn_diff = ev_rt_now - mn_now;
755 1311
756 if (methods == EVMETHOD_AUTO) 1312 io_blocktime = 0.;
757 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1313 timeout_blocktime = 0.;
1314 backend = 0;
1315 backend_fd = -1;
1316 gotasync = 0;
1317#if EV_USE_INOTIFY
1318 fs_fd = -2;
1319#endif
1320
1321 /* pid check not overridable via env */
1322#ifndef _WIN32
1323 if (flags & EVFLAG_FORKCHECK)
1324 curpid = getpid ();
1325#endif
1326
1327 if (!(flags & EVFLAG_NOENV)
1328 && !enable_secure ()
1329 && getenv ("LIBEV_FLAGS"))
758 methods = atoi (getenv ("LIBEV_METHODS")); 1330 flags = atoi (getenv ("LIBEV_FLAGS"));
759 else
760 methods = EVMETHOD_ANY;
761 1331
762 method = 0; 1332 if (!(flags & 0x0000ffffU))
763#if EV_USE_WIN32 1333 flags |= ev_recommended_backends ();
764 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1334
1335#if EV_USE_PORT
1336 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
765#endif 1337#endif
766#if EV_USE_KQUEUE 1338#if EV_USE_KQUEUE
767 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1339 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
768#endif 1340#endif
769#if EV_USE_EPOLL 1341#if EV_USE_EPOLL
770 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1342 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
771#endif 1343#endif
772#if EV_USE_POLL 1344#if EV_USE_POLL
773 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1345 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
774#endif 1346#endif
775#if EV_USE_SELECT 1347#if EV_USE_SELECT
776 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1348 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
777#endif 1349#endif
778 1350
779 ev_init (&sigev, sigcb); 1351 ev_init (&pipeev, pipecb);
780 ev_set_priority (&sigev, EV_MAXPRI); 1352 ev_set_priority (&pipeev, EV_MAXPRI);
781 } 1353 }
782} 1354}
783 1355
784void 1356static void noinline
785loop_destroy (EV_P) 1357loop_destroy (EV_P)
786{ 1358{
787 int i; 1359 int i;
788 1360
1361 if (ev_is_active (&pipeev))
1362 {
1363 ev_ref (EV_A); /* signal watcher */
1364 ev_io_stop (EV_A_ &pipeev);
1365
1366#if EV_USE_EVENTFD
1367 if (evfd >= 0)
1368 close (evfd);
1369#endif
1370
1371 if (evpipe [0] >= 0)
1372 {
1373 close (evpipe [0]);
1374 close (evpipe [1]);
1375 }
1376 }
1377
789#if EV_USE_WIN32 1378#if EV_USE_INOTIFY
790 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1379 if (fs_fd >= 0)
1380 close (fs_fd);
1381#endif
1382
1383 if (backend_fd >= 0)
1384 close (backend_fd);
1385
1386#if EV_USE_PORT
1387 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
791#endif 1388#endif
792#if EV_USE_KQUEUE 1389#if EV_USE_KQUEUE
793 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1390 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
794#endif 1391#endif
795#if EV_USE_EPOLL 1392#if EV_USE_EPOLL
796 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1393 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
797#endif 1394#endif
798#if EV_USE_POLL 1395#if EV_USE_POLL
799 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1396 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
800#endif 1397#endif
801#if EV_USE_SELECT 1398#if EV_USE_SELECT
802 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1399 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
803#endif 1400#endif
804 1401
805 for (i = NUMPRI; i--; ) 1402 for (i = NUMPRI; i--; )
1403 {
806 array_free (pending, [i]); 1404 array_free (pending, [i]);
1405#if EV_IDLE_ENABLE
1406 array_free (idle, [i]);
1407#endif
1408 }
1409
1410 ev_free (anfds); anfdmax = 0;
807 1411
808 /* have to use the microsoft-never-gets-it-right macro */ 1412 /* have to use the microsoft-never-gets-it-right macro */
809 array_free_microshit (fdchange); 1413 array_free (fdchange, EMPTY);
810 array_free_microshit (timer); 1414 array_free (timer, EMPTY);
811#if EV_PERIODICS 1415#if EV_PERIODIC_ENABLE
812 array_free_microshit (periodic); 1416 array_free (periodic, EMPTY);
813#endif 1417#endif
814 array_free_microshit (idle); 1418#if EV_FORK_ENABLE
815 array_free_microshit (prepare); 1419 array_free (fork, EMPTY);
816 array_free_microshit (check); 1420#endif
1421 array_free (prepare, EMPTY);
1422 array_free (check, EMPTY);
1423#if EV_ASYNC_ENABLE
1424 array_free (async, EMPTY);
1425#endif
817 1426
818 method = 0; 1427 backend = 0;
819} 1428}
820 1429
821static void 1430#if EV_USE_INOTIFY
1431void inline_size infy_fork (EV_P);
1432#endif
1433
1434void inline_size
822loop_fork (EV_P) 1435loop_fork (EV_P)
823{ 1436{
1437#if EV_USE_PORT
1438 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1439#endif
1440#if EV_USE_KQUEUE
1441 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1442#endif
824#if EV_USE_EPOLL 1443#if EV_USE_EPOLL
825 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1444 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
826#endif 1445#endif
827#if EV_USE_KQUEUE 1446#if EV_USE_INOTIFY
828 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1447 infy_fork (EV_A);
829#endif 1448#endif
830 1449
831 if (ev_is_active (&sigev)) 1450 if (ev_is_active (&pipeev))
832 { 1451 {
833 /* default loop */ 1452 /* this "locks" the handlers against writing to the pipe */
1453 /* while we modify the fd vars */
1454 gotsig = 1;
1455#if EV_ASYNC_ENABLE
1456 gotasync = 1;
1457#endif
834 1458
835 ev_ref (EV_A); 1459 ev_ref (EV_A);
836 ev_io_stop (EV_A_ &sigev); 1460 ev_io_stop (EV_A_ &pipeev);
1461
1462#if EV_USE_EVENTFD
1463 if (evfd >= 0)
1464 close (evfd);
1465#endif
1466
1467 if (evpipe [0] >= 0)
1468 {
837 close (sigpipe [0]); 1469 close (evpipe [0]);
838 close (sigpipe [1]); 1470 close (evpipe [1]);
1471 }
839 1472
840 while (pipe (sigpipe))
841 syserr ("(libev) error creating pipe");
842
843 siginit (EV_A); 1473 evpipe_init (EV_A);
1474 /* now iterate over everything, in case we missed something */
1475 pipecb (EV_A_ &pipeev, EV_READ);
844 } 1476 }
845 1477
846 postfork = 0; 1478 postfork = 0;
847} 1479}
1480
1481#if EV_MULTIPLICITY
1482
1483struct ev_loop *
1484ev_loop_new (unsigned int flags)
1485{
1486 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1487
1488 memset (loop, 0, sizeof (struct ev_loop));
1489
1490 loop_init (EV_A_ flags);
1491
1492 if (ev_backend (EV_A))
1493 return loop;
1494
1495 return 0;
1496}
1497
1498void
1499ev_loop_destroy (EV_P)
1500{
1501 loop_destroy (EV_A);
1502 ev_free (loop);
1503}
1504
1505void
1506ev_loop_fork (EV_P)
1507{
1508 postfork = 1; /* must be in line with ev_default_fork */
1509}
1510
1511#if EV_VERIFY
1512void noinline
1513verify_watcher (EV_P_ W w)
1514{
1515 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1516
1517 if (w->pending)
1518 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1519}
1520
1521static void noinline
1522verify_heap (EV_P_ ANHE *heap, int N)
1523{
1524 int i;
1525
1526 for (i = HEAP0; i < N + HEAP0; ++i)
1527 {
1528 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1529 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1530 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1531
1532 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1533 }
1534}
1535
1536static void noinline
1537array_verify (EV_P_ W *ws, int cnt)
1538{
1539 while (cnt--)
1540 {
1541 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1542 verify_watcher (EV_A_ ws [cnt]);
1543 }
1544}
1545#endif
1546
1547void
1548ev_loop_verify (EV_P)
1549{
1550#if EV_VERIFY
1551 int i;
1552 WL w;
1553
1554 assert (activecnt >= -1);
1555
1556 assert (fdchangemax >= fdchangecnt);
1557 for (i = 0; i < fdchangecnt; ++i)
1558 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1559
1560 assert (anfdmax >= 0);
1561 for (i = 0; i < anfdmax; ++i)
1562 for (w = anfds [i].head; w; w = w->next)
1563 {
1564 verify_watcher (EV_A_ (W)w);
1565 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1566 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1567 }
1568
1569 assert (timermax >= timercnt);
1570 verify_heap (EV_A_ timers, timercnt);
1571
1572#if EV_PERIODIC_ENABLE
1573 assert (periodicmax >= periodiccnt);
1574 verify_heap (EV_A_ periodics, periodiccnt);
1575#endif
1576
1577 for (i = NUMPRI; i--; )
1578 {
1579 assert (pendingmax [i] >= pendingcnt [i]);
1580#if EV_IDLE_ENABLE
1581 assert (idleall >= 0);
1582 assert (idlemax [i] >= idlecnt [i]);
1583 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1584#endif
1585 }
1586
1587#if EV_FORK_ENABLE
1588 assert (forkmax >= forkcnt);
1589 array_verify (EV_A_ (W *)forks, forkcnt);
1590#endif
1591
1592#if EV_ASYNC_ENABLE
1593 assert (asyncmax >= asynccnt);
1594 array_verify (EV_A_ (W *)asyncs, asynccnt);
1595#endif
1596
1597 assert (preparemax >= preparecnt);
1598 array_verify (EV_A_ (W *)prepares, preparecnt);
1599
1600 assert (checkmax >= checkcnt);
1601 array_verify (EV_A_ (W *)checks, checkcnt);
1602
1603# if 0
1604 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1605 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1606# endif
1607#endif
1608}
1609
1610#endif /* multiplicity */
848 1611
849#if EV_MULTIPLICITY 1612#if EV_MULTIPLICITY
850struct ev_loop * 1613struct ev_loop *
851ev_loop_new (int methods) 1614ev_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 1615#else
883int 1616int
1617ev_default_loop (unsigned int flags)
884#endif 1618#endif
885ev_default_loop (int methods)
886{ 1619{
887 if (sigpipe [0] == sigpipe [1])
888 if (pipe (sigpipe))
889 return 0;
890
891 if (!default_loop) 1620 if (!ev_default_loop_ptr)
892 { 1621 {
893#if EV_MULTIPLICITY 1622#if EV_MULTIPLICITY
894 struct ev_loop *loop = default_loop = &default_loop_struct; 1623 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
895#else 1624#else
896 default_loop = 1; 1625 ev_default_loop_ptr = 1;
897#endif 1626#endif
898 1627
899 loop_init (EV_A_ methods); 1628 loop_init (EV_A_ flags);
900 1629
901 if (ev_method (EV_A)) 1630 if (ev_backend (EV_A))
902 { 1631 {
903 siginit (EV_A);
904
905#ifndef WIN32 1632#ifndef _WIN32
906 ev_signal_init (&childev, childcb, SIGCHLD); 1633 ev_signal_init (&childev, childcb, SIGCHLD);
907 ev_set_priority (&childev, EV_MAXPRI); 1634 ev_set_priority (&childev, EV_MAXPRI);
908 ev_signal_start (EV_A_ &childev); 1635 ev_signal_start (EV_A_ &childev);
909 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1636 ev_unref (EV_A); /* child watcher should not keep loop alive */
910#endif 1637#endif
911 } 1638 }
912 else 1639 else
913 default_loop = 0; 1640 ev_default_loop_ptr = 0;
914 } 1641 }
915 1642
916 return default_loop; 1643 return ev_default_loop_ptr;
917} 1644}
918 1645
919void 1646void
920ev_default_destroy (void) 1647ev_default_destroy (void)
921{ 1648{
922#if EV_MULTIPLICITY 1649#if EV_MULTIPLICITY
923 struct ev_loop *loop = default_loop; 1650 struct ev_loop *loop = ev_default_loop_ptr;
924#endif 1651#endif
925 1652
926#ifndef WIN32 1653#ifndef _WIN32
927 ev_ref (EV_A); /* child watcher */ 1654 ev_ref (EV_A); /* child watcher */
928 ev_signal_stop (EV_A_ &childev); 1655 ev_signal_stop (EV_A_ &childev);
929#endif 1656#endif
930 1657
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); 1658 loop_destroy (EV_A);
938} 1659}
939 1660
940void 1661void
941ev_default_fork (void) 1662ev_default_fork (void)
942{ 1663{
943#if EV_MULTIPLICITY 1664#if EV_MULTIPLICITY
944 struct ev_loop *loop = default_loop; 1665 struct ev_loop *loop = ev_default_loop_ptr;
945#endif 1666#endif
946 1667
947 if (method) 1668 if (backend)
948 postfork = 1; 1669 postfork = 1; /* must be in line with ev_loop_fork */
949} 1670}
950 1671
951/*****************************************************************************/ 1672/*****************************************************************************/
952 1673
953static int 1674void
954any_pending (EV_P) 1675ev_invoke (EV_P_ void *w, int revents)
955{ 1676{
956 int pri; 1677 EV_CB_INVOKE ((W)w, revents);
957
958 for (pri = NUMPRI; pri--; )
959 if (pendingcnt [pri])
960 return 1;
961
962 return 0;
963} 1678}
964 1679
965static void 1680void inline_speed
966call_pending (EV_P) 1681call_pending (EV_P)
967{ 1682{
968 int pri; 1683 int pri;
969 1684
970 for (pri = NUMPRI; pri--; ) 1685 for (pri = NUMPRI; pri--; )
971 while (pendingcnt [pri]) 1686 while (pendingcnt [pri])
972 { 1687 {
973 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1688 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
974 1689
975 if (p->w) 1690 if (expect_true (p->w))
976 { 1691 {
1692 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1693
977 p->w->pending = 0; 1694 p->w->pending = 0;
978 EV_CB_INVOKE (p->w, p->events); 1695 EV_CB_INVOKE (p->w, p->events);
1696 EV_FREQUENT_CHECK;
979 } 1697 }
980 } 1698 }
981} 1699}
982 1700
983static void 1701#if EV_IDLE_ENABLE
1702void inline_size
1703idle_reify (EV_P)
1704{
1705 if (expect_false (idleall))
1706 {
1707 int pri;
1708
1709 for (pri = NUMPRI; pri--; )
1710 {
1711 if (pendingcnt [pri])
1712 break;
1713
1714 if (idlecnt [pri])
1715 {
1716 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1717 break;
1718 }
1719 }
1720 }
1721}
1722#endif
1723
1724void inline_size
984timers_reify (EV_P) 1725timers_reify (EV_P)
985{ 1726{
1727 EV_FREQUENT_CHECK;
1728
986 while (timercnt && ((WT)timers [0])->at <= mn_now) 1729 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
987 { 1730 {
988 struct ev_timer *w = timers [0]; 1731 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
989 1732
990 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1733 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
991 1734
992 /* first reschedule or stop timer */ 1735 /* first reschedule or stop timer */
993 if (w->repeat) 1736 if (w->repeat)
994 { 1737 {
1738 ev_at (w) += w->repeat;
1739 if (ev_at (w) < mn_now)
1740 ev_at (w) = mn_now;
1741
995 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1742 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
996 1743
997 ((WT)w)->at += w->repeat; 1744 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); 1745 downheap (timers, timercnt, HEAP0);
1002 } 1746 }
1003 else 1747 else
1004 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1748 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1005 1749
1750 EV_FREQUENT_CHECK;
1006 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1751 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1007 } 1752 }
1008} 1753}
1009 1754
1010#if EV_PERIODICS 1755#if EV_PERIODIC_ENABLE
1011static void 1756void inline_size
1012periodics_reify (EV_P) 1757periodics_reify (EV_P)
1013{ 1758{
1759 EV_FREQUENT_CHECK;
1760
1014 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1761 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1015 { 1762 {
1016 struct ev_periodic *w = periodics [0]; 1763 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1017 1764
1018 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1765 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1019 1766
1020 /* first reschedule or stop timer */ 1767 /* first reschedule or stop timer */
1021 if (w->reschedule_cb) 1768 if (w->reschedule_cb)
1022 { 1769 {
1023 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1770 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1024 1771
1025 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1772 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1773
1774 ANHE_at_cache (periodics [HEAP0]);
1026 downheap ((WT *)periodics, periodiccnt, 0); 1775 downheap (periodics, periodiccnt, HEAP0);
1027 } 1776 }
1028 else if (w->interval) 1777 else if (w->interval)
1029 { 1778 {
1030 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1779 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)); 1780 /* if next trigger time is not sufficiently in the future, put it there */
1781 /* this might happen because of floating point inexactness */
1782 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1783 {
1784 ev_at (w) += w->interval;
1785
1786 /* if interval is unreasonably low we might still have a time in the past */
1787 /* so correct this. this will make the periodic very inexact, but the user */
1788 /* has effectively asked to get triggered more often than possible */
1789 if (ev_at (w) < ev_rt_now)
1790 ev_at (w) = ev_rt_now;
1791 }
1792
1793 ANHE_at_cache (periodics [HEAP0]);
1032 downheap ((WT *)periodics, periodiccnt, 0); 1794 downheap (periodics, periodiccnt, HEAP0);
1033 } 1795 }
1034 else 1796 else
1035 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1797 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1036 1798
1799 EV_FREQUENT_CHECK;
1037 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1800 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1038 } 1801 }
1039} 1802}
1040 1803
1041static void 1804static void noinline
1042periodics_reschedule (EV_P) 1805periodics_reschedule (EV_P)
1043{ 1806{
1044 int i; 1807 int i;
1045 1808
1046 /* adjust periodics after time jump */ 1809 /* adjust periodics after time jump */
1047 for (i = 0; i < periodiccnt; ++i) 1810 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1048 { 1811 {
1049 struct ev_periodic *w = periodics [i]; 1812 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1050 1813
1051 if (w->reschedule_cb) 1814 if (w->reschedule_cb)
1052 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1815 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1053 else if (w->interval) 1816 else if (w->interval)
1054 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1817 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1818
1819 ANHE_at_cache (periodics [i]);
1820 }
1821
1822 reheap (periodics, periodiccnt);
1823}
1824#endif
1825
1826void inline_speed
1827time_update (EV_P_ ev_tstamp max_block)
1828{
1829 int i;
1830
1831#if EV_USE_MONOTONIC
1832 if (expect_true (have_monotonic))
1055 } 1833 {
1834 ev_tstamp odiff = rtmn_diff;
1056 1835
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 (); 1836 mn_now = get_clock ();
1067 1837
1838 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1839 /* interpolate in the meantime */
1068 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1840 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1069 { 1841 {
1070 ev_rt_now = rtmn_diff + mn_now; 1842 ev_rt_now = rtmn_diff + mn_now;
1071 return 0; 1843 return;
1072 } 1844 }
1073 else 1845
1074 {
1075 now_floor = mn_now; 1846 now_floor = mn_now;
1076 ev_rt_now = ev_time (); 1847 ev_rt_now = ev_time ();
1077 return 1;
1078 }
1079}
1080 1848
1081static void 1849 /* loop a few times, before making important decisions.
1082time_update (EV_P) 1850 * on the choice of "4": one iteration isn't enough,
1083{ 1851 * in case we get preempted during the calls to
1084 int i; 1852 * ev_time and get_clock. a second call is almost guaranteed
1085 1853 * to succeed in that case, though. and looping a few more times
1086#if EV_USE_MONOTONIC 1854 * doesn't hurt either as we only do this on time-jumps or
1087 if (expect_true (have_monotonic)) 1855 * in the unlikely event of having been preempted here.
1088 { 1856 */
1089 if (time_update_monotonic (EV_A)) 1857 for (i = 4; --i; )
1090 { 1858 {
1091 ev_tstamp odiff = rtmn_diff; 1859 rtmn_diff = ev_rt_now - mn_now;
1092 1860
1093 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1861 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1862 return; /* all is well */
1863
1864 ev_rt_now = ev_time ();
1865 mn_now = get_clock ();
1866 now_floor = mn_now;
1867 }
1868
1869# if EV_PERIODIC_ENABLE
1870 periodics_reschedule (EV_A);
1871# endif
1872 /* no timer adjustment, as the monotonic clock doesn't jump */
1873 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1874 }
1875 else
1876#endif
1877 {
1878 ev_rt_now = ev_time ();
1879
1880 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1881 {
1882#if EV_PERIODIC_ENABLE
1883 periodics_reschedule (EV_A);
1884#endif
1885 /* adjust timers. this is easy, as the offset is the same for all of them */
1886 for (i = 0; i < timercnt; ++i)
1094 { 1887 {
1095 rtmn_diff = ev_rt_now - mn_now; 1888 ANHE *he = timers + i + HEAP0;
1096 1889 ANHE_w (*he)->at += ev_rt_now - mn_now;
1097 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1890 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 } 1891 }
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 } 1892 }
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 1893
1128 mn_now = ev_rt_now; 1894 mn_now = ev_rt_now;
1129 } 1895 }
1130} 1896}
1131 1897
… …
1144static int loop_done; 1910static int loop_done;
1145 1911
1146void 1912void
1147ev_loop (EV_P_ int flags) 1913ev_loop (EV_P_ int flags)
1148{ 1914{
1149 double block; 1915 loop_done = EVUNLOOP_CANCEL;
1150 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1916
1917 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1151 1918
1152 do 1919 do
1153 { 1920 {
1921#if EV_VERIFY >= 2
1922 ev_loop_verify (EV_A);
1923#endif
1924
1925#ifndef _WIN32
1926 if (expect_false (curpid)) /* penalise the forking check even more */
1927 if (expect_false (getpid () != curpid))
1928 {
1929 curpid = getpid ();
1930 postfork = 1;
1931 }
1932#endif
1933
1934#if EV_FORK_ENABLE
1935 /* we might have forked, so queue fork handlers */
1936 if (expect_false (postfork))
1937 if (forkcnt)
1938 {
1939 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1940 call_pending (EV_A);
1941 }
1942#endif
1943
1154 /* queue check watchers (and execute them) */ 1944 /* queue prepare watchers (and execute them) */
1155 if (expect_false (preparecnt)) 1945 if (expect_false (preparecnt))
1156 { 1946 {
1157 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1947 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1158 call_pending (EV_A); 1948 call_pending (EV_A);
1159 } 1949 }
1160 1950
1951 if (expect_false (!activecnt))
1952 break;
1953
1161 /* we might have forked, so reify kernel state if necessary */ 1954 /* we might have forked, so reify kernel state if necessary */
1162 if (expect_false (postfork)) 1955 if (expect_false (postfork))
1163 loop_fork (EV_A); 1956 loop_fork (EV_A);
1164 1957
1165 /* update fd-related kernel structures */ 1958 /* update fd-related kernel structures */
1166 fd_reify (EV_A); 1959 fd_reify (EV_A);
1167 1960
1168 /* calculate blocking time */ 1961 /* calculate blocking time */
1962 {
1963 ev_tstamp waittime = 0.;
1964 ev_tstamp sleeptime = 0.;
1169 1965
1170 /* we only need this for !monotonic clock or timers, but as we basically 1966 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 { 1967 {
1178 ev_rt_now = ev_time (); 1968 /* update time to cancel out callback processing overhead */
1179 mn_now = ev_rt_now; 1969 time_update (EV_A_ 1e100);
1180 }
1181 1970
1182 if (flags & EVLOOP_NONBLOCK || idlecnt)
1183 block = 0.;
1184 else
1185 {
1186 block = MAX_BLOCKTIME; 1971 waittime = MAX_BLOCKTIME;
1187 1972
1188 if (timercnt) 1973 if (timercnt)
1189 { 1974 {
1190 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1975 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1191 if (block > to) block = to; 1976 if (waittime > to) waittime = to;
1192 } 1977 }
1193 1978
1194#if EV_PERIODICS 1979#if EV_PERIODIC_ENABLE
1195 if (periodiccnt) 1980 if (periodiccnt)
1196 { 1981 {
1197 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1982 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1198 if (block > to) block = to; 1983 if (waittime > to) waittime = to;
1199 } 1984 }
1200#endif 1985#endif
1201 1986
1202 if (block < 0.) block = 0.; 1987 if (expect_false (waittime < timeout_blocktime))
1988 waittime = timeout_blocktime;
1989
1990 sleeptime = waittime - backend_fudge;
1991
1992 if (expect_true (sleeptime > io_blocktime))
1993 sleeptime = io_blocktime;
1994
1995 if (sleeptime)
1996 {
1997 ev_sleep (sleeptime);
1998 waittime -= sleeptime;
1999 }
1203 } 2000 }
1204 2001
1205 method_poll (EV_A_ block); 2002 ++loop_count;
2003 backend_poll (EV_A_ waittime);
1206 2004
1207 /* update ev_rt_now, do magic */ 2005 /* update ev_rt_now, do magic */
1208 time_update (EV_A); 2006 time_update (EV_A_ waittime + sleeptime);
2007 }
1209 2008
1210 /* queue pending timers and reschedule them */ 2009 /* queue pending timers and reschedule them */
1211 timers_reify (EV_A); /* relative timers called last */ 2010 timers_reify (EV_A); /* relative timers called last */
1212#if EV_PERIODICS 2011#if EV_PERIODIC_ENABLE
1213 periodics_reify (EV_A); /* absolute timers called first */ 2012 periodics_reify (EV_A); /* absolute timers called first */
1214#endif 2013#endif
1215 2014
2015#if EV_IDLE_ENABLE
1216 /* queue idle watchers unless io or timers are pending */ 2016 /* queue idle watchers unless other events are pending */
1217 if (idlecnt && !any_pending (EV_A)) 2017 idle_reify (EV_A);
1218 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2018#endif
1219 2019
1220 /* queue check watchers, to be executed first */ 2020 /* queue check watchers, to be executed first */
1221 if (checkcnt) 2021 if (expect_false (checkcnt))
1222 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2022 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1223 2023
1224 call_pending (EV_A); 2024 call_pending (EV_A);
1225 } 2025 }
1226 while (activecnt && !loop_done); 2026 while (expect_true (
2027 activecnt
2028 && !loop_done
2029 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2030 ));
1227 2031
1228 if (loop_done != 2) 2032 if (loop_done == EVUNLOOP_ONE)
1229 loop_done = 0; 2033 loop_done = EVUNLOOP_CANCEL;
1230} 2034}
1231 2035
1232void 2036void
1233ev_unloop (EV_P_ int how) 2037ev_unloop (EV_P_ int how)
1234{ 2038{
1235 loop_done = how; 2039 loop_done = how;
1236} 2040}
1237 2041
1238/*****************************************************************************/ 2042/*****************************************************************************/
1239 2043
1240inline void 2044void inline_size
1241wlist_add (WL *head, WL elem) 2045wlist_add (WL *head, WL elem)
1242{ 2046{
1243 elem->next = *head; 2047 elem->next = *head;
1244 *head = elem; 2048 *head = elem;
1245} 2049}
1246 2050
1247inline void 2051void inline_size
1248wlist_del (WL *head, WL elem) 2052wlist_del (WL *head, WL elem)
1249{ 2053{
1250 while (*head) 2054 while (*head)
1251 { 2055 {
1252 if (*head == elem) 2056 if (*head == elem)
… …
1257 2061
1258 head = &(*head)->next; 2062 head = &(*head)->next;
1259 } 2063 }
1260} 2064}
1261 2065
1262inline void 2066void inline_speed
1263ev_clear_pending (EV_P_ W w) 2067clear_pending (EV_P_ W w)
1264{ 2068{
1265 if (w->pending) 2069 if (w->pending)
1266 { 2070 {
1267 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2071 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1268 w->pending = 0; 2072 w->pending = 0;
1269 } 2073 }
1270} 2074}
1271 2075
1272inline void 2076int
2077ev_clear_pending (EV_P_ void *w)
2078{
2079 W w_ = (W)w;
2080 int pending = w_->pending;
2081
2082 if (expect_true (pending))
2083 {
2084 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2085 w_->pending = 0;
2086 p->w = 0;
2087 return p->events;
2088 }
2089 else
2090 return 0;
2091}
2092
2093void inline_size
2094pri_adjust (EV_P_ W w)
2095{
2096 int pri = w->priority;
2097 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2098 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2099 w->priority = pri;
2100}
2101
2102void inline_speed
1273ev_start (EV_P_ W w, int active) 2103ev_start (EV_P_ W w, int active)
1274{ 2104{
1275 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2105 pri_adjust (EV_A_ w);
1276 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1277
1278 w->active = active; 2106 w->active = active;
1279 ev_ref (EV_A); 2107 ev_ref (EV_A);
1280} 2108}
1281 2109
1282inline void 2110void inline_size
1283ev_stop (EV_P_ W w) 2111ev_stop (EV_P_ W w)
1284{ 2112{
1285 ev_unref (EV_A); 2113 ev_unref (EV_A);
1286 w->active = 0; 2114 w->active = 0;
1287} 2115}
1288 2116
1289/*****************************************************************************/ 2117/*****************************************************************************/
1290 2118
1291void 2119void noinline
1292ev_io_start (EV_P_ struct ev_io *w) 2120ev_io_start (EV_P_ ev_io *w)
1293{ 2121{
1294 int fd = w->fd; 2122 int fd = w->fd;
1295 2123
1296 if (ev_is_active (w)) 2124 if (expect_false (ev_is_active (w)))
1297 return; 2125 return;
1298 2126
1299 assert (("ev_io_start called with negative fd", fd >= 0)); 2127 assert (("ev_io_start called with negative fd", fd >= 0));
2128
2129 EV_FREQUENT_CHECK;
1300 2130
1301 ev_start (EV_A_ (W)w, 1); 2131 ev_start (EV_A_ (W)w, 1);
1302 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2132 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1303 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2133 wlist_add (&anfds[fd].head, (WL)w);
1304 2134
1305 fd_change (EV_A_ fd); 2135 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1306} 2136 w->events &= ~EV_IOFDSET;
1307 2137
1308void 2138 EV_FREQUENT_CHECK;
2139}
2140
2141void noinline
1309ev_io_stop (EV_P_ struct ev_io *w) 2142ev_io_stop (EV_P_ ev_io *w)
1310{ 2143{
1311 ev_clear_pending (EV_A_ (W)w); 2144 clear_pending (EV_A_ (W)w);
1312 if (!ev_is_active (w)) 2145 if (expect_false (!ev_is_active (w)))
1313 return; 2146 return;
1314 2147
1315 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2148 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1316 2149
2150 EV_FREQUENT_CHECK;
2151
1317 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2152 wlist_del (&anfds[w->fd].head, (WL)w);
1318 ev_stop (EV_A_ (W)w); 2153 ev_stop (EV_A_ (W)w);
1319 2154
1320 fd_change (EV_A_ w->fd); 2155 fd_change (EV_A_ w->fd, 1);
1321}
1322 2156
1323void 2157 EV_FREQUENT_CHECK;
2158}
2159
2160void noinline
1324ev_timer_start (EV_P_ struct ev_timer *w) 2161ev_timer_start (EV_P_ ev_timer *w)
1325{ 2162{
1326 if (ev_is_active (w)) 2163 if (expect_false (ev_is_active (w)))
1327 return; 2164 return;
1328 2165
1329 ((WT)w)->at += mn_now; 2166 ev_at (w) += mn_now;
1330 2167
1331 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2168 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1332 2169
2170 EV_FREQUENT_CHECK;
2171
2172 ++timercnt;
1333 ev_start (EV_A_ (W)w, ++timercnt); 2173 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1334 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2174 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1335 timers [timercnt - 1] = w; 2175 ANHE_w (timers [ev_active (w)]) = (WT)w;
1336 upheap ((WT *)timers, timercnt - 1); 2176 ANHE_at_cache (timers [ev_active (w)]);
2177 upheap (timers, ev_active (w));
1337 2178
2179 EV_FREQUENT_CHECK;
2180
1338 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2181 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1339} 2182}
1340 2183
1341void 2184void noinline
1342ev_timer_stop (EV_P_ struct ev_timer *w) 2185ev_timer_stop (EV_P_ ev_timer *w)
1343{ 2186{
1344 ev_clear_pending (EV_A_ (W)w); 2187 clear_pending (EV_A_ (W)w);
1345 if (!ev_is_active (w)) 2188 if (expect_false (!ev_is_active (w)))
1346 return; 2189 return;
1347 2190
2191 EV_FREQUENT_CHECK;
2192
2193 {
2194 int active = ev_active (w);
2195
1348 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2196 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1349 2197
1350 if (((W)w)->active < timercnt--) 2198 --timercnt;
2199
2200 if (expect_true (active < timercnt + HEAP0))
1351 { 2201 {
1352 timers [((W)w)->active - 1] = timers [timercnt]; 2202 timers [active] = timers [timercnt + HEAP0];
1353 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2203 adjustheap (timers, timercnt, active);
1354 } 2204 }
2205 }
1355 2206
1356 ((WT)w)->at -= mn_now; 2207 EV_FREQUENT_CHECK;
2208
2209 ev_at (w) -= mn_now;
1357 2210
1358 ev_stop (EV_A_ (W)w); 2211 ev_stop (EV_A_ (W)w);
1359} 2212}
1360 2213
1361void 2214void noinline
1362ev_timer_again (EV_P_ struct ev_timer *w) 2215ev_timer_again (EV_P_ ev_timer *w)
1363{ 2216{
2217 EV_FREQUENT_CHECK;
2218
1364 if (ev_is_active (w)) 2219 if (ev_is_active (w))
1365 { 2220 {
1366 if (w->repeat) 2221 if (w->repeat)
1367 { 2222 {
1368 ((WT)w)->at = mn_now + w->repeat; 2223 ev_at (w) = mn_now + w->repeat;
2224 ANHE_at_cache (timers [ev_active (w)]);
1369 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2225 adjustheap (timers, timercnt, ev_active (w));
1370 } 2226 }
1371 else 2227 else
1372 ev_timer_stop (EV_A_ w); 2228 ev_timer_stop (EV_A_ w);
1373 } 2229 }
1374 else if (w->repeat) 2230 else if (w->repeat)
2231 {
2232 ev_at (w) = w->repeat;
1375 ev_timer_start (EV_A_ w); 2233 ev_timer_start (EV_A_ w);
1376} 2234 }
1377 2235
2236 EV_FREQUENT_CHECK;
2237}
2238
1378#if EV_PERIODICS 2239#if EV_PERIODIC_ENABLE
1379void 2240void noinline
1380ev_periodic_start (EV_P_ struct ev_periodic *w) 2241ev_periodic_start (EV_P_ ev_periodic *w)
1381{ 2242{
1382 if (ev_is_active (w)) 2243 if (expect_false (ev_is_active (w)))
1383 return; 2244 return;
1384 2245
1385 if (w->reschedule_cb) 2246 if (w->reschedule_cb)
1386 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2247 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1387 else if (w->interval) 2248 else if (w->interval)
1388 { 2249 {
1389 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2250 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 */ 2251 /* 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; 2252 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1392 } 2253 }
2254 else
2255 ev_at (w) = w->offset;
1393 2256
2257 EV_FREQUENT_CHECK;
2258
2259 ++periodiccnt;
1394 ev_start (EV_A_ (W)w, ++periodiccnt); 2260 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1395 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2261 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1396 periodics [periodiccnt - 1] = w; 2262 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1397 upheap ((WT *)periodics, periodiccnt - 1); 2263 ANHE_at_cache (periodics [ev_active (w)]);
2264 upheap (periodics, ev_active (w));
1398 2265
2266 EV_FREQUENT_CHECK;
2267
1399 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2268 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1400} 2269}
1401 2270
1402void 2271void noinline
1403ev_periodic_stop (EV_P_ struct ev_periodic *w) 2272ev_periodic_stop (EV_P_ ev_periodic *w)
1404{ 2273{
1405 ev_clear_pending (EV_A_ (W)w); 2274 clear_pending (EV_A_ (W)w);
1406 if (!ev_is_active (w)) 2275 if (expect_false (!ev_is_active (w)))
1407 return; 2276 return;
1408 2277
2278 EV_FREQUENT_CHECK;
2279
2280 {
2281 int active = ev_active (w);
2282
1409 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2283 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1410 2284
1411 if (((W)w)->active < periodiccnt--) 2285 --periodiccnt;
2286
2287 if (expect_true (active < periodiccnt + HEAP0))
1412 { 2288 {
1413 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2289 periodics [active] = periodics [periodiccnt + HEAP0];
1414 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2290 adjustheap (periodics, periodiccnt, active);
1415 } 2291 }
2292 }
2293
2294 EV_FREQUENT_CHECK;
1416 2295
1417 ev_stop (EV_A_ (W)w); 2296 ev_stop (EV_A_ (W)w);
1418} 2297}
1419 2298
1420void 2299void noinline
1421ev_periodic_again (EV_P_ struct ev_periodic *w) 2300ev_periodic_again (EV_P_ ev_periodic *w)
1422{ 2301{
1423 /* TODO: use adjustheap and recalculation */ 2302 /* TODO: use adjustheap and recalculation */
1424 ev_periodic_stop (EV_A_ w); 2303 ev_periodic_stop (EV_A_ w);
1425 ev_periodic_start (EV_A_ w); 2304 ev_periodic_start (EV_A_ w);
1426} 2305}
1427#endif 2306#endif
1428 2307
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 2308#ifndef SA_RESTART
1496# define SA_RESTART 0 2309# define SA_RESTART 0
1497#endif 2310#endif
1498 2311
1499void 2312void noinline
1500ev_signal_start (EV_P_ struct ev_signal *w) 2313ev_signal_start (EV_P_ ev_signal *w)
1501{ 2314{
1502#if EV_MULTIPLICITY 2315#if EV_MULTIPLICITY
1503 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2316 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1504#endif 2317#endif
1505 if (ev_is_active (w)) 2318 if (expect_false (ev_is_active (w)))
1506 return; 2319 return;
1507 2320
1508 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2321 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1509 2322
2323 evpipe_init (EV_A);
2324
2325 EV_FREQUENT_CHECK;
2326
2327 {
2328#ifndef _WIN32
2329 sigset_t full, prev;
2330 sigfillset (&full);
2331 sigprocmask (SIG_SETMASK, &full, &prev);
2332#endif
2333
2334 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2335
2336#ifndef _WIN32
2337 sigprocmask (SIG_SETMASK, &prev, 0);
2338#endif
2339 }
2340
1510 ev_start (EV_A_ (W)w, 1); 2341 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); 2342 wlist_add (&signals [w->signum - 1].head, (WL)w);
1513 2343
1514 if (!((WL)w)->next) 2344 if (!((WL)w)->next)
1515 { 2345 {
1516#if WIN32 2346#if _WIN32
1517 signal (w->signum, sighandler); 2347 signal (w->signum, ev_sighandler);
1518#else 2348#else
1519 struct sigaction sa; 2349 struct sigaction sa;
1520 sa.sa_handler = sighandler; 2350 sa.sa_handler = ev_sighandler;
1521 sigfillset (&sa.sa_mask); 2351 sigfillset (&sa.sa_mask);
1522 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2352 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1523 sigaction (w->signum, &sa, 0); 2353 sigaction (w->signum, &sa, 0);
1524#endif 2354#endif
1525 } 2355 }
1526}
1527 2356
1528void 2357 EV_FREQUENT_CHECK;
2358}
2359
2360void noinline
1529ev_signal_stop (EV_P_ struct ev_signal *w) 2361ev_signal_stop (EV_P_ ev_signal *w)
1530{ 2362{
1531 ev_clear_pending (EV_A_ (W)w); 2363 clear_pending (EV_A_ (W)w);
1532 if (!ev_is_active (w)) 2364 if (expect_false (!ev_is_active (w)))
1533 return; 2365 return;
1534 2366
2367 EV_FREQUENT_CHECK;
2368
1535 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2369 wlist_del (&signals [w->signum - 1].head, (WL)w);
1536 ev_stop (EV_A_ (W)w); 2370 ev_stop (EV_A_ (W)w);
1537 2371
1538 if (!signals [w->signum - 1].head) 2372 if (!signals [w->signum - 1].head)
1539 signal (w->signum, SIG_DFL); 2373 signal (w->signum, SIG_DFL);
1540}
1541 2374
2375 EV_FREQUENT_CHECK;
2376}
2377
1542void 2378void
1543ev_child_start (EV_P_ struct ev_child *w) 2379ev_child_start (EV_P_ ev_child *w)
1544{ 2380{
1545#if EV_MULTIPLICITY 2381#if EV_MULTIPLICITY
1546 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2382 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1547#endif 2383#endif
1548 if (ev_is_active (w)) 2384 if (expect_false (ev_is_active (w)))
1549 return; 2385 return;
1550 2386
2387 EV_FREQUENT_CHECK;
2388
1551 ev_start (EV_A_ (W)w, 1); 2389 ev_start (EV_A_ (W)w, 1);
1552 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2390 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1553}
1554 2391
2392 EV_FREQUENT_CHECK;
2393}
2394
1555void 2395void
1556ev_child_stop (EV_P_ struct ev_child *w) 2396ev_child_stop (EV_P_ ev_child *w)
1557{ 2397{
1558 ev_clear_pending (EV_A_ (W)w); 2398 clear_pending (EV_A_ (W)w);
1559 if (!ev_is_active (w)) 2399 if (expect_false (!ev_is_active (w)))
1560 return; 2400 return;
1561 2401
2402 EV_FREQUENT_CHECK;
2403
1562 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2404 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1563 ev_stop (EV_A_ (W)w); 2405 ev_stop (EV_A_ (W)w);
2406
2407 EV_FREQUENT_CHECK;
1564} 2408}
2409
2410#if EV_STAT_ENABLE
2411
2412# ifdef _WIN32
2413# undef lstat
2414# define lstat(a,b) _stati64 (a,b)
2415# endif
2416
2417#define DEF_STAT_INTERVAL 5.0074891
2418#define MIN_STAT_INTERVAL 0.1074891
2419
2420static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2421
2422#if EV_USE_INOTIFY
2423# define EV_INOTIFY_BUFSIZE 8192
2424
2425static void noinline
2426infy_add (EV_P_ ev_stat *w)
2427{
2428 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);
2429
2430 if (w->wd < 0)
2431 {
2432 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2433
2434 /* monitor some parent directory for speedup hints */
2435 /* note that exceeding the hardcoded limit is not a correctness issue, */
2436 /* but an efficiency issue only */
2437 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2438 {
2439 char path [4096];
2440 strcpy (path, w->path);
2441
2442 do
2443 {
2444 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2445 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2446
2447 char *pend = strrchr (path, '/');
2448
2449 if (!pend)
2450 break; /* whoops, no '/', complain to your admin */
2451
2452 *pend = 0;
2453 w->wd = inotify_add_watch (fs_fd, path, mask);
2454 }
2455 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2456 }
2457 }
2458 else
2459 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2460
2461 if (w->wd >= 0)
2462 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2463}
2464
2465static void noinline
2466infy_del (EV_P_ ev_stat *w)
2467{
2468 int slot;
2469 int wd = w->wd;
2470
2471 if (wd < 0)
2472 return;
2473
2474 w->wd = -2;
2475 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2476 wlist_del (&fs_hash [slot].head, (WL)w);
2477
2478 /* remove this watcher, if others are watching it, they will rearm */
2479 inotify_rm_watch (fs_fd, wd);
2480}
2481
2482static void noinline
2483infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2484{
2485 if (slot < 0)
2486 /* overflow, need to check for all hahs slots */
2487 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2488 infy_wd (EV_A_ slot, wd, ev);
2489 else
2490 {
2491 WL w_;
2492
2493 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2494 {
2495 ev_stat *w = (ev_stat *)w_;
2496 w_ = w_->next; /* lets us remove this watcher and all before it */
2497
2498 if (w->wd == wd || wd == -1)
2499 {
2500 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2501 {
2502 w->wd = -1;
2503 infy_add (EV_A_ w); /* re-add, no matter what */
2504 }
2505
2506 stat_timer_cb (EV_A_ &w->timer, 0);
2507 }
2508 }
2509 }
2510}
2511
2512static void
2513infy_cb (EV_P_ ev_io *w, int revents)
2514{
2515 char buf [EV_INOTIFY_BUFSIZE];
2516 struct inotify_event *ev = (struct inotify_event *)buf;
2517 int ofs;
2518 int len = read (fs_fd, buf, sizeof (buf));
2519
2520 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2521 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2522}
2523
2524void inline_size
2525infy_init (EV_P)
2526{
2527 if (fs_fd != -2)
2528 return;
2529
2530 fs_fd = inotify_init ();
2531
2532 if (fs_fd >= 0)
2533 {
2534 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2535 ev_set_priority (&fs_w, EV_MAXPRI);
2536 ev_io_start (EV_A_ &fs_w);
2537 }
2538}
2539
2540void inline_size
2541infy_fork (EV_P)
2542{
2543 int slot;
2544
2545 if (fs_fd < 0)
2546 return;
2547
2548 close (fs_fd);
2549 fs_fd = inotify_init ();
2550
2551 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2552 {
2553 WL w_ = fs_hash [slot].head;
2554 fs_hash [slot].head = 0;
2555
2556 while (w_)
2557 {
2558 ev_stat *w = (ev_stat *)w_;
2559 w_ = w_->next; /* lets us add this watcher */
2560
2561 w->wd = -1;
2562
2563 if (fs_fd >= 0)
2564 infy_add (EV_A_ w); /* re-add, no matter what */
2565 else
2566 ev_timer_start (EV_A_ &w->timer);
2567 }
2568
2569 }
2570}
2571
2572#endif
2573
2574#ifdef _WIN32
2575# define EV_LSTAT(p,b) _stati64 (p, b)
2576#else
2577# define EV_LSTAT(p,b) lstat (p, b)
2578#endif
2579
2580void
2581ev_stat_stat (EV_P_ ev_stat *w)
2582{
2583 if (lstat (w->path, &w->attr) < 0)
2584 w->attr.st_nlink = 0;
2585 else if (!w->attr.st_nlink)
2586 w->attr.st_nlink = 1;
2587}
2588
2589static void noinline
2590stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2591{
2592 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2593
2594 /* we copy this here each the time so that */
2595 /* prev has the old value when the callback gets invoked */
2596 w->prev = w->attr;
2597 ev_stat_stat (EV_A_ w);
2598
2599 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2600 if (
2601 w->prev.st_dev != w->attr.st_dev
2602 || w->prev.st_ino != w->attr.st_ino
2603 || w->prev.st_mode != w->attr.st_mode
2604 || w->prev.st_nlink != w->attr.st_nlink
2605 || w->prev.st_uid != w->attr.st_uid
2606 || w->prev.st_gid != w->attr.st_gid
2607 || w->prev.st_rdev != w->attr.st_rdev
2608 || w->prev.st_size != w->attr.st_size
2609 || w->prev.st_atime != w->attr.st_atime
2610 || w->prev.st_mtime != w->attr.st_mtime
2611 || w->prev.st_ctime != w->attr.st_ctime
2612 ) {
2613 #if EV_USE_INOTIFY
2614 infy_del (EV_A_ w);
2615 infy_add (EV_A_ w);
2616 ev_stat_stat (EV_A_ w); /* avoid race... */
2617 #endif
2618
2619 ev_feed_event (EV_A_ w, EV_STAT);
2620 }
2621}
2622
2623void
2624ev_stat_start (EV_P_ ev_stat *w)
2625{
2626 if (expect_false (ev_is_active (w)))
2627 return;
2628
2629 /* since we use memcmp, we need to clear any padding data etc. */
2630 memset (&w->prev, 0, sizeof (ev_statdata));
2631 memset (&w->attr, 0, sizeof (ev_statdata));
2632
2633 ev_stat_stat (EV_A_ w);
2634
2635 if (w->interval < MIN_STAT_INTERVAL)
2636 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2637
2638 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2639 ev_set_priority (&w->timer, ev_priority (w));
2640
2641#if EV_USE_INOTIFY
2642 infy_init (EV_A);
2643
2644 if (fs_fd >= 0)
2645 infy_add (EV_A_ w);
2646 else
2647#endif
2648 ev_timer_start (EV_A_ &w->timer);
2649
2650 ev_start (EV_A_ (W)w, 1);
2651
2652 EV_FREQUENT_CHECK;
2653}
2654
2655void
2656ev_stat_stop (EV_P_ ev_stat *w)
2657{
2658 clear_pending (EV_A_ (W)w);
2659 if (expect_false (!ev_is_active (w)))
2660 return;
2661
2662 EV_FREQUENT_CHECK;
2663
2664#if EV_USE_INOTIFY
2665 infy_del (EV_A_ w);
2666#endif
2667 ev_timer_stop (EV_A_ &w->timer);
2668
2669 ev_stop (EV_A_ (W)w);
2670
2671 EV_FREQUENT_CHECK;
2672}
2673#endif
2674
2675#if EV_IDLE_ENABLE
2676void
2677ev_idle_start (EV_P_ ev_idle *w)
2678{
2679 if (expect_false (ev_is_active (w)))
2680 return;
2681
2682 pri_adjust (EV_A_ (W)w);
2683
2684 EV_FREQUENT_CHECK;
2685
2686 {
2687 int active = ++idlecnt [ABSPRI (w)];
2688
2689 ++idleall;
2690 ev_start (EV_A_ (W)w, active);
2691
2692 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2693 idles [ABSPRI (w)][active - 1] = w;
2694 }
2695
2696 EV_FREQUENT_CHECK;
2697}
2698
2699void
2700ev_idle_stop (EV_P_ ev_idle *w)
2701{
2702 clear_pending (EV_A_ (W)w);
2703 if (expect_false (!ev_is_active (w)))
2704 return;
2705
2706 EV_FREQUENT_CHECK;
2707
2708 {
2709 int active = ev_active (w);
2710
2711 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2712 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2713
2714 ev_stop (EV_A_ (W)w);
2715 --idleall;
2716 }
2717
2718 EV_FREQUENT_CHECK;
2719}
2720#endif
2721
2722void
2723ev_prepare_start (EV_P_ ev_prepare *w)
2724{
2725 if (expect_false (ev_is_active (w)))
2726 return;
2727
2728 EV_FREQUENT_CHECK;
2729
2730 ev_start (EV_A_ (W)w, ++preparecnt);
2731 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2732 prepares [preparecnt - 1] = w;
2733
2734 EV_FREQUENT_CHECK;
2735}
2736
2737void
2738ev_prepare_stop (EV_P_ ev_prepare *w)
2739{
2740 clear_pending (EV_A_ (W)w);
2741 if (expect_false (!ev_is_active (w)))
2742 return;
2743
2744 EV_FREQUENT_CHECK;
2745
2746 {
2747 int active = ev_active (w);
2748
2749 prepares [active - 1] = prepares [--preparecnt];
2750 ev_active (prepares [active - 1]) = active;
2751 }
2752
2753 ev_stop (EV_A_ (W)w);
2754
2755 EV_FREQUENT_CHECK;
2756}
2757
2758void
2759ev_check_start (EV_P_ ev_check *w)
2760{
2761 if (expect_false (ev_is_active (w)))
2762 return;
2763
2764 EV_FREQUENT_CHECK;
2765
2766 ev_start (EV_A_ (W)w, ++checkcnt);
2767 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2768 checks [checkcnt - 1] = w;
2769
2770 EV_FREQUENT_CHECK;
2771}
2772
2773void
2774ev_check_stop (EV_P_ ev_check *w)
2775{
2776 clear_pending (EV_A_ (W)w);
2777 if (expect_false (!ev_is_active (w)))
2778 return;
2779
2780 EV_FREQUENT_CHECK;
2781
2782 {
2783 int active = ev_active (w);
2784
2785 checks [active - 1] = checks [--checkcnt];
2786 ev_active (checks [active - 1]) = active;
2787 }
2788
2789 ev_stop (EV_A_ (W)w);
2790
2791 EV_FREQUENT_CHECK;
2792}
2793
2794#if EV_EMBED_ENABLE
2795void noinline
2796ev_embed_sweep (EV_P_ ev_embed *w)
2797{
2798 ev_loop (w->other, EVLOOP_NONBLOCK);
2799}
2800
2801static void
2802embed_io_cb (EV_P_ ev_io *io, int revents)
2803{
2804 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2805
2806 if (ev_cb (w))
2807 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2808 else
2809 ev_loop (w->other, EVLOOP_NONBLOCK);
2810}
2811
2812static void
2813embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2814{
2815 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2816
2817 {
2818 struct ev_loop *loop = w->other;
2819
2820 while (fdchangecnt)
2821 {
2822 fd_reify (EV_A);
2823 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2824 }
2825 }
2826}
2827
2828#if 0
2829static void
2830embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2831{
2832 ev_idle_stop (EV_A_ idle);
2833}
2834#endif
2835
2836void
2837ev_embed_start (EV_P_ ev_embed *w)
2838{
2839 if (expect_false (ev_is_active (w)))
2840 return;
2841
2842 {
2843 struct ev_loop *loop = w->other;
2844 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2845 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2846 }
2847
2848 EV_FREQUENT_CHECK;
2849
2850 ev_set_priority (&w->io, ev_priority (w));
2851 ev_io_start (EV_A_ &w->io);
2852
2853 ev_prepare_init (&w->prepare, embed_prepare_cb);
2854 ev_set_priority (&w->prepare, EV_MINPRI);
2855 ev_prepare_start (EV_A_ &w->prepare);
2856
2857 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2858
2859 ev_start (EV_A_ (W)w, 1);
2860
2861 EV_FREQUENT_CHECK;
2862}
2863
2864void
2865ev_embed_stop (EV_P_ ev_embed *w)
2866{
2867 clear_pending (EV_A_ (W)w);
2868 if (expect_false (!ev_is_active (w)))
2869 return;
2870
2871 EV_FREQUENT_CHECK;
2872
2873 ev_io_stop (EV_A_ &w->io);
2874 ev_prepare_stop (EV_A_ &w->prepare);
2875
2876 ev_stop (EV_A_ (W)w);
2877
2878 EV_FREQUENT_CHECK;
2879}
2880#endif
2881
2882#if EV_FORK_ENABLE
2883void
2884ev_fork_start (EV_P_ ev_fork *w)
2885{
2886 if (expect_false (ev_is_active (w)))
2887 return;
2888
2889 EV_FREQUENT_CHECK;
2890
2891 ev_start (EV_A_ (W)w, ++forkcnt);
2892 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2893 forks [forkcnt - 1] = w;
2894
2895 EV_FREQUENT_CHECK;
2896}
2897
2898void
2899ev_fork_stop (EV_P_ ev_fork *w)
2900{
2901 clear_pending (EV_A_ (W)w);
2902 if (expect_false (!ev_is_active (w)))
2903 return;
2904
2905 EV_FREQUENT_CHECK;
2906
2907 {
2908 int active = ev_active (w);
2909
2910 forks [active - 1] = forks [--forkcnt];
2911 ev_active (forks [active - 1]) = active;
2912 }
2913
2914 ev_stop (EV_A_ (W)w);
2915
2916 EV_FREQUENT_CHECK;
2917}
2918#endif
2919
2920#if EV_ASYNC_ENABLE
2921void
2922ev_async_start (EV_P_ ev_async *w)
2923{
2924 if (expect_false (ev_is_active (w)))
2925 return;
2926
2927 evpipe_init (EV_A);
2928
2929 EV_FREQUENT_CHECK;
2930
2931 ev_start (EV_A_ (W)w, ++asynccnt);
2932 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2933 asyncs [asynccnt - 1] = w;
2934
2935 EV_FREQUENT_CHECK;
2936}
2937
2938void
2939ev_async_stop (EV_P_ ev_async *w)
2940{
2941 clear_pending (EV_A_ (W)w);
2942 if (expect_false (!ev_is_active (w)))
2943 return;
2944
2945 EV_FREQUENT_CHECK;
2946
2947 {
2948 int active = ev_active (w);
2949
2950 asyncs [active - 1] = asyncs [--asynccnt];
2951 ev_active (asyncs [active - 1]) = active;
2952 }
2953
2954 ev_stop (EV_A_ (W)w);
2955
2956 EV_FREQUENT_CHECK;
2957}
2958
2959void
2960ev_async_send (EV_P_ ev_async *w)
2961{
2962 w->sent = 1;
2963 evpipe_write (EV_A_ &gotasync);
2964}
2965#endif
1565 2966
1566/*****************************************************************************/ 2967/*****************************************************************************/
1567 2968
1568struct ev_once 2969struct ev_once
1569{ 2970{
1570 struct ev_io io; 2971 ev_io io;
1571 struct ev_timer to; 2972 ev_timer to;
1572 void (*cb)(int revents, void *arg); 2973 void (*cb)(int revents, void *arg);
1573 void *arg; 2974 void *arg;
1574}; 2975};
1575 2976
1576static void 2977static void
… …
1585 2986
1586 cb (revents, arg); 2987 cb (revents, arg);
1587} 2988}
1588 2989
1589static void 2990static void
1590once_cb_io (EV_P_ struct ev_io *w, int revents) 2991once_cb_io (EV_P_ ev_io *w, int revents)
1591{ 2992{
1592 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2993 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1593} 2994}
1594 2995
1595static void 2996static void
1596once_cb_to (EV_P_ struct ev_timer *w, int revents) 2997once_cb_to (EV_P_ ev_timer *w, int revents)
1597{ 2998{
1598 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2999 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1599} 3000}
1600 3001
1601void 3002void
1602ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3003ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1603{ 3004{
1604 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3005 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1605 3006
1606 if (!once) 3007 if (expect_false (!once))
3008 {
1607 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3009 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1608 else 3010 return;
1609 { 3011 }
3012
1610 once->cb = cb; 3013 once->cb = cb;
1611 once->arg = arg; 3014 once->arg = arg;
1612 3015
1613 ev_init (&once->io, once_cb_io); 3016 ev_init (&once->io, once_cb_io);
1614 if (fd >= 0) 3017 if (fd >= 0)
1615 { 3018 {
1616 ev_io_set (&once->io, fd, events); 3019 ev_io_set (&once->io, fd, events);
1617 ev_io_start (EV_A_ &once->io); 3020 ev_io_start (EV_A_ &once->io);
1618 } 3021 }
1619 3022
1620 ev_init (&once->to, once_cb_to); 3023 ev_init (&once->to, once_cb_to);
1621 if (timeout >= 0.) 3024 if (timeout >= 0.)
1622 { 3025 {
1623 ev_timer_set (&once->to, timeout, 0.); 3026 ev_timer_set (&once->to, timeout, 0.);
1624 ev_timer_start (EV_A_ &once->to); 3027 ev_timer_start (EV_A_ &once->to);
1625 }
1626 } 3028 }
1627} 3029}
3030
3031#if EV_MULTIPLICITY
3032 #include "ev_wrap.h"
3033#endif
1628 3034
1629#ifdef __cplusplus 3035#ifdef __cplusplus
1630} 3036}
1631#endif 3037#endif
1632 3038

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