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Comparing libev/ev.c (file contents):
Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC vs.
Revision 1.234 by root, Tue May 6 23:42:16 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 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
33 51
34# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
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
37# endif 66# endif
38 67
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
40# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
41# endif 74# endif
42 75
43# if HAVE_POLL && HAVE_POLL_H 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
44# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
45# endif 82# endif
46 83
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
48# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
49# endif 90# endif
50 91
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
53# 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
54 115
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
55#endif 132#endif
56 133
57#include <math.h> 134#include <math.h>
58#include <stdlib.h> 135#include <stdlib.h>
59#include <fcntl.h> 136#include <fcntl.h>
… …
64#include <assert.h> 141#include <assert.h>
65#include <errno.h> 142#include <errno.h>
66#include <sys/types.h> 143#include <sys/types.h>
67#include <time.h> 144#include <time.h>
68 145
69#ifndef PERL
70# include <signal.h> 146#include <signal.h>
71#endif
72 147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
73#ifndef WIN32 154#ifndef _WIN32
74# include <unistd.h>
75# include <sys/time.h> 155# include <sys/time.h>
76# include <sys/wait.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
77#endif 163# endif
78/**/ 164#endif
165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
79 167
80#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
81# define EV_USE_MONOTONIC 1 169# define EV_USE_MONOTONIC 0
170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
82#endif 178#endif
83 179
84#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
85# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
86#endif 182#endif
87 183
88#ifndef EV_USE_POLL 184#ifndef EV_USE_POLL
89# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
189# endif
90#endif 190#endif
91 191
92#ifndef EV_USE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
93# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
94#endif 198#endif
95 199
96#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
97# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
98#endif 202#endif
99 203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
100#ifndef EV_USE_WIN32 208#ifndef EV_USE_INOTIFY
101# ifdef WIN32 209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
102# define EV_USE_WIN32 0 /* it does not exist, use select */
103# undef EV_USE_SELECT
104# define EV_USE_SELECT 1 210# define EV_USE_INOTIFY 1
105# else 211# else
106# define EV_USE_WIN32 0 212# define EV_USE_INOTIFY 0
107# endif 213# endif
108#endif 214#endif
109 215
110#ifndef EV_USE_REALTIME 216#ifndef EV_PID_HASHSIZE
111# define EV_USE_REALTIME 1 217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
112#endif 221# endif
222#endif
113 223
114/**/ 224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
115 241
116#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
117# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
118# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
119#endif 245#endif
… …
121#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
122# undef EV_USE_REALTIME 248# undef EV_USE_REALTIME
123# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
124#endif 250#endif
125 251
252#if !EV_STAT_ENABLE
253# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0
255#endif
256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
260# endif
261#endif
262
263#if EV_USE_INOTIFY
264# include <sys/inotify.h>
265#endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
281#endif
282
126/**/ 283/**/
127 284
285/*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
294
128#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
129#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
130#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
131/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
132 298
133#include "ev.h"
134
135#if __GNUC__ >= 3 299#if __GNUC__ >= 4
136# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
137# define inline inline 301# define noinline __attribute__ ((noinline))
138#else 302#else
139# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
140# define inline static 304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
141#endif 308#endif
142 309
143#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
144#define expect_true(expr) expect ((expr) != 0, 1) 311#define expect_true(expr) expect ((expr) != 0, 1)
312#define inline_size static inline
313
314#if EV_MINIMAL
315# define inline_speed static noinline
316#else
317# define inline_speed static inline
318#endif
145 319
146#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
147#define ABSPRI(w) ((w)->priority - EV_MINPRI) 321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
148 322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
149typedef struct ev_watcher *W; 326typedef ev_watcher *W;
150typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
151typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
152 329
330#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at
332
333#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
153static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
337#endif
154 338
155#if WIN32 339#ifdef _WIN32
156/* note: the comment below could not be substantiated, but what would I care */ 340# include "ev_win32.c"
157/* MSDN says this is required to handle SIGFPE */
158volatile double SIGFPE_REQ = 0.0f;
159#endif 341#endif
160 342
161/*****************************************************************************/ 343/*****************************************************************************/
162 344
163static void (*syserr_cb)(const char *msg); 345static void (*syserr_cb)(const char *msg);
164 346
347void
165void ev_set_syserr_cb (void (*cb)(const char *msg)) 348ev_set_syserr_cb (void (*cb)(const char *msg))
166{ 349{
167 syserr_cb = cb; 350 syserr_cb = cb;
168} 351}
169 352
170static void 353static void noinline
171syserr (const char *msg) 354syserr (const char *msg)
172{ 355{
173 if (!msg) 356 if (!msg)
174 msg = "(libev) system error"; 357 msg = "(libev) system error";
175 358
… …
180 perror (msg); 363 perror (msg);
181 abort (); 364 abort ();
182 } 365 }
183} 366}
184 367
368static void *
369ev_realloc_emul (void *ptr, long size)
370{
371 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and
373 * the single unix specification, so work around them here.
374 */
375
376 if (size)
377 return realloc (ptr, size);
378
379 free (ptr);
380 return 0;
381}
382
185static void *(*alloc)(void *ptr, long size); 383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
186 384
385void
187void ev_set_allocator (void *(*cb)(void *ptr, long size)) 386ev_set_allocator (void *(*cb)(void *ptr, long size))
188{ 387{
189 alloc = cb; 388 alloc = cb;
190} 389}
191 390
192static void * 391inline_speed void *
193ev_realloc (void *ptr, long size) 392ev_realloc (void *ptr, long size)
194{ 393{
195 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 394 ptr = alloc (ptr, size);
196 395
197 if (!ptr && size) 396 if (!ptr && size)
198 { 397 {
199 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
200 abort (); 399 abort ();
… …
211typedef struct 410typedef struct
212{ 411{
213 WL head; 412 WL head;
214 unsigned char events; 413 unsigned char events;
215 unsigned char reify; 414 unsigned char reify;
415#if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417#endif
216} ANFD; 418} ANFD;
217 419
218typedef struct 420typedef struct
219{ 421{
220 W w; 422 W w;
221 int events; 423 int events;
222} ANPENDING; 424} ANPENDING;
223 425
426#if EV_USE_INOTIFY
427typedef struct
428{
429 WL head;
430} ANFS;
431#endif
432
224#if EV_MULTIPLICITY 433#if EV_MULTIPLICITY
225 434
226struct ev_loop 435 struct ev_loop
227{ 436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
228# define VAR(name,decl) decl; 439 #define VAR(name,decl) decl;
229# include "ev_vars.h" 440 #include "ev_vars.h"
230};
231# undef VAR 441 #undef VAR
442 };
232# include "ev_wrap.h" 443 #include "ev_wrap.h"
444
445 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr;
233 447
234#else 448#else
235 449
450 ev_tstamp ev_rt_now;
236# define VAR(name,decl) static decl; 451 #define VAR(name,decl) static decl;
237# include "ev_vars.h" 452 #include "ev_vars.h"
238# undef VAR 453 #undef VAR
454
455 static int ev_default_loop_ptr;
239 456
240#endif 457#endif
241 458
242/*****************************************************************************/ 459/*****************************************************************************/
243 460
244inline ev_tstamp 461ev_tstamp
245ev_time (void) 462ev_time (void)
246{ 463{
247#if EV_USE_REALTIME 464#if EV_USE_REALTIME
248 struct timespec ts; 465 struct timespec ts;
249 clock_gettime (CLOCK_REALTIME, &ts); 466 clock_gettime (CLOCK_REALTIME, &ts);
… …
253 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
254 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
255#endif 472#endif
256} 473}
257 474
258inline ev_tstamp 475ev_tstamp inline_size
259get_clock (void) 476get_clock (void)
260{ 477{
261#if EV_USE_MONOTONIC 478#if EV_USE_MONOTONIC
262 if (expect_true (have_monotonic)) 479 if (expect_true (have_monotonic))
263 { 480 {
… …
268#endif 485#endif
269 486
270 return ev_time (); 487 return ev_time ();
271} 488}
272 489
490#if EV_MULTIPLICITY
273ev_tstamp 491ev_tstamp
274ev_now (EV_P) 492ev_now (EV_P)
275{ 493{
276 return rt_now; 494 return ev_rt_now;
277} 495}
496#endif
278 497
279#define array_roundsize(base,n) ((n) | 4 & ~3) 498void
499ev_sleep (ev_tstamp delay)
500{
501 if (delay > 0.)
502 {
503#if EV_USE_NANOSLEEP
504 struct timespec ts;
280 505
506 ts.tv_sec = (time_t)delay;
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0);
510#elif defined(_WIN32)
511 Sleep ((unsigned long)(delay * 1e3));
512#else
513 struct timeval tv;
514
515 tv.tv_sec = (time_t)delay;
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
517
518 select (0, 0, 0, 0, &tv);
519#endif
520 }
521}
522
523/*****************************************************************************/
524
525#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
526
527int inline_size
528array_nextsize (int elem, int cur, int cnt)
529{
530 int ncur = cur + 1;
531
532 do
533 ncur <<= 1;
534 while (cnt > ncur);
535
536 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
537 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
538 {
539 ncur *= elem;
540 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
541 ncur = ncur - sizeof (void *) * 4;
542 ncur /= elem;
543 }
544
545 return ncur;
546}
547
548static noinline void *
549array_realloc (int elem, void *base, int *cur, int cnt)
550{
551 *cur = array_nextsize (elem, *cur, cnt);
552 return ev_realloc (base, elem * *cur);
553}
554
281#define array_needsize(base,cur,cnt,init) \ 555#define array_needsize(type,base,cur,cnt,init) \
282 if (expect_false ((cnt) > cur)) \ 556 if (expect_false ((cnt) > (cur))) \
283 { \ 557 { \
284 int newcnt = cur; \ 558 int ocur_ = (cur); \
285 do \ 559 (base) = (type *)array_realloc \
286 { \ 560 (sizeof (type), (base), &(cur), (cnt)); \
287 newcnt = array_roundsize (base, newcnt << 1); \ 561 init ((base) + (ocur_), (cur) - ocur_); \
288 } \
289 while ((cnt) > newcnt); \
290 \
291 base = ev_realloc (base, sizeof (*base) * (newcnt)); \
292 init (base + cur, newcnt - cur); \
293 cur = newcnt; \
294 } 562 }
295 563
564#if 0
296#define array_slim(stem) \ 565#define array_slim(type,stem) \
297 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 566 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
298 { \ 567 { \
299 stem ## max = array_roundsize (stem ## cnt >> 1); \ 568 stem ## max = array_roundsize (stem ## cnt >> 1); \
300 base = ev_realloc (base, sizeof (*base) * (stem ## max)); \ 569 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
301 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 570 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
302 } 571 }
303 572#endif
304/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
305/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
306#define array_free_microshit(stem) \
307 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
308 573
309#define array_free(stem, idx) \ 574#define array_free(stem, idx) \
310 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 575 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
311 576
312/*****************************************************************************/ 577/*****************************************************************************/
313 578
314static void 579void noinline
580ev_feed_event (EV_P_ void *w, int revents)
581{
582 W w_ = (W)w;
583 int pri = ABSPRI (w_);
584
585 if (expect_false (w_->pending))
586 pendings [pri][w_->pending - 1].events |= revents;
587 else
588 {
589 w_->pending = ++pendingcnt [pri];
590 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
591 pendings [pri][w_->pending - 1].w = w_;
592 pendings [pri][w_->pending - 1].events = revents;
593 }
594}
595
596void inline_speed
597queue_events (EV_P_ W *events, int eventcnt, int type)
598{
599 int i;
600
601 for (i = 0; i < eventcnt; ++i)
602 ev_feed_event (EV_A_ events [i], type);
603}
604
605/*****************************************************************************/
606
607void inline_size
315anfds_init (ANFD *base, int count) 608anfds_init (ANFD *base, int count)
316{ 609{
317 while (count--) 610 while (count--)
318 { 611 {
319 base->head = 0; 612 base->head = 0;
… …
322 615
323 ++base; 616 ++base;
324 } 617 }
325} 618}
326 619
327static void 620void inline_speed
328event (EV_P_ W w, int events)
329{
330 if (w->pending)
331 {
332 pendings [ABSPRI (w)][w->pending - 1].events |= events;
333 return;
334 }
335
336 w->pending = ++pendingcnt [ABSPRI (w)];
337 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
338 pendings [ABSPRI (w)][w->pending - 1].w = w;
339 pendings [ABSPRI (w)][w->pending - 1].events = events;
340}
341
342static void
343queue_events (EV_P_ W *events, int eventcnt, int type)
344{
345 int i;
346
347 for (i = 0; i < eventcnt; ++i)
348 event (EV_A_ events [i], type);
349}
350
351static void
352fd_event (EV_P_ int fd, int events) 621fd_event (EV_P_ int fd, int revents)
353{ 622{
354 ANFD *anfd = anfds + fd; 623 ANFD *anfd = anfds + fd;
355 struct ev_io *w; 624 ev_io *w;
356 625
357 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 626 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
358 { 627 {
359 int ev = w->events & events; 628 int ev = w->events & revents;
360 629
361 if (ev) 630 if (ev)
362 event (EV_A_ (W)w, ev); 631 ev_feed_event (EV_A_ (W)w, ev);
363 } 632 }
364} 633}
365 634
366/*****************************************************************************/ 635void
636ev_feed_fd_event (EV_P_ int fd, int revents)
637{
638 if (fd >= 0 && fd < anfdmax)
639 fd_event (EV_A_ fd, revents);
640}
367 641
368static void 642void inline_size
369fd_reify (EV_P) 643fd_reify (EV_P)
370{ 644{
371 int i; 645 int i;
372 646
373 for (i = 0; i < fdchangecnt; ++i) 647 for (i = 0; i < fdchangecnt; ++i)
374 { 648 {
375 int fd = fdchanges [i]; 649 int fd = fdchanges [i];
376 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
377 struct ev_io *w; 651 ev_io *w;
378 652
379 int events = 0; 653 unsigned char events = 0;
380 654
381 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 655 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
382 events |= w->events; 656 events |= (unsigned char)w->events;
383 657
658#if EV_SELECT_IS_WINSOCKET
659 if (events)
660 {
661 unsigned long argp;
662 #ifdef EV_FD_TO_WIN32_HANDLE
663 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
664 #else
665 anfd->handle = _get_osfhandle (fd);
666 #endif
667 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
668 }
669#endif
670
671 {
672 unsigned char o_events = anfd->events;
673 unsigned char o_reify = anfd->reify;
674
384 anfd->reify = 0; 675 anfd->reify = 0;
385
386 method_modify (EV_A_ fd, anfd->events, events);
387 anfd->events = events; 676 anfd->events = events;
677
678 if (o_events != events || o_reify & EV_IOFDSET)
679 backend_modify (EV_A_ fd, o_events, events);
680 }
388 } 681 }
389 682
390 fdchangecnt = 0; 683 fdchangecnt = 0;
391} 684}
392 685
393static void 686void inline_size
394fd_change (EV_P_ int fd) 687fd_change (EV_P_ int fd, int flags)
395{ 688{
396 if (anfds [fd].reify) 689 unsigned char reify = anfds [fd].reify;
397 return;
398
399 anfds [fd].reify = 1; 690 anfds [fd].reify |= flags;
400 691
692 if (expect_true (!reify))
693 {
401 ++fdchangecnt; 694 ++fdchangecnt;
402 array_needsize (fdchanges, fdchangemax, fdchangecnt, (void)); 695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
403 fdchanges [fdchangecnt - 1] = fd; 696 fdchanges [fdchangecnt - 1] = fd;
697 }
404} 698}
405 699
406static void 700void inline_speed
407fd_kill (EV_P_ int fd) 701fd_kill (EV_P_ int fd)
408{ 702{
409 struct ev_io *w; 703 ev_io *w;
410 704
411 while ((w = (struct ev_io *)anfds [fd].head)) 705 while ((w = (ev_io *)anfds [fd].head))
412 { 706 {
413 ev_io_stop (EV_A_ w); 707 ev_io_stop (EV_A_ w);
414 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 708 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
415 } 709 }
416} 710}
417 711
418static int 712int inline_size
419fd_valid (int fd) 713fd_valid (int fd)
420{ 714{
421#ifdef WIN32 715#ifdef _WIN32
422 return !!win32_get_osfhandle (fd); 716 return _get_osfhandle (fd) != -1;
423#else 717#else
424 return fcntl (fd, F_GETFD) != -1; 718 return fcntl (fd, F_GETFD) != -1;
425#endif 719#endif
426} 720}
427 721
428/* called on EBADF to verify fds */ 722/* called on EBADF to verify fds */
429static void 723static void noinline
430fd_ebadf (EV_P) 724fd_ebadf (EV_P)
431{ 725{
432 int fd; 726 int fd;
433 727
434 for (fd = 0; fd < anfdmax; ++fd) 728 for (fd = 0; fd < anfdmax; ++fd)
… …
436 if (!fd_valid (fd) == -1 && errno == EBADF) 730 if (!fd_valid (fd) == -1 && errno == EBADF)
437 fd_kill (EV_A_ fd); 731 fd_kill (EV_A_ fd);
438} 732}
439 733
440/* called on ENOMEM in select/poll to kill some fds and retry */ 734/* called on ENOMEM in select/poll to kill some fds and retry */
441static void 735static void noinline
442fd_enomem (EV_P) 736fd_enomem (EV_P)
443{ 737{
444 int fd; 738 int fd;
445 739
446 for (fd = anfdmax; fd--; ) 740 for (fd = anfdmax; fd--; )
… …
449 fd_kill (EV_A_ fd); 743 fd_kill (EV_A_ fd);
450 return; 744 return;
451 } 745 }
452} 746}
453 747
454/* usually called after fork if method needs to re-arm all fds from scratch */ 748/* usually called after fork if backend needs to re-arm all fds from scratch */
455static void 749static void noinline
456fd_rearm_all (EV_P) 750fd_rearm_all (EV_P)
457{ 751{
458 int fd; 752 int fd;
459 753
460 /* this should be highly optimised to not do anything but set a flag */
461 for (fd = 0; fd < anfdmax; ++fd) 754 for (fd = 0; fd < anfdmax; ++fd)
462 if (anfds [fd].events) 755 if (anfds [fd].events)
463 { 756 {
464 anfds [fd].events = 0; 757 anfds [fd].events = 0;
465 fd_change (EV_A_ fd); 758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
466 } 759 }
467} 760}
468 761
469/*****************************************************************************/ 762/*****************************************************************************/
470 763
471static void 764/* towards the root */
765void inline_speed
472upheap (WT *heap, int k) 766upheap (WT *heap, int k)
473{ 767{
474 WT w = heap [k]; 768 WT w = heap [k];
475 769
476 while (k && heap [k >> 1]->at > w->at) 770 for (;;)
477 { 771 {
772 int p = k >> 1;
773
774 /* maybe we could use a dummy element at heap [0]? */
775 if (!p || heap [p]->at <= w->at)
776 break;
777
478 heap [k] = heap [k >> 1]; 778 heap [k] = heap [p];
479 ((W)heap [k])->active = k + 1; 779 ev_active (heap [k]) = k;
480 k >>= 1; 780 k = p;
481 } 781 }
482 782
483 heap [k] = w; 783 heap [k] = w;
484 ((W)heap [k])->active = k + 1; 784 ev_active (heap [k]) = k;
485
486} 785}
487 786
488static void 787/* away from the root */
788void inline_speed
489downheap (WT *heap, int N, int k) 789downheap (WT *heap, int N, int k)
490{ 790{
491 WT w = heap [k]; 791 WT w = heap [k];
492 792
493 while (k < (N >> 1)) 793 for (;;)
494 { 794 {
495 int j = k << 1; 795 int c = k << 1;
496 796
497 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 797 if (c > N)
498 ++j;
499
500 if (w->at <= heap [j]->at)
501 break; 798 break;
502 799
800 c += c < N && heap [c]->at > heap [c + 1]->at
801 ? 1 : 0;
802
803 if (w->at <= heap [c]->at)
804 break;
805
503 heap [k] = heap [j]; 806 heap [k] = heap [c];
504 ((W)heap [k])->active = k + 1; 807 ev_active (heap [k]) = k;
808
505 k = j; 809 k = c;
506 } 810 }
507 811
508 heap [k] = w; 812 heap [k] = w;
509 ((W)heap [k])->active = k + 1; 813 ev_active (heap [k]) = k;
814}
815
816void inline_size
817adjustheap (WT *heap, int N, int k)
818{
819 upheap (heap, k);
820 downheap (heap, N, k);
510} 821}
511 822
512/*****************************************************************************/ 823/*****************************************************************************/
513 824
514typedef struct 825typedef struct
515{ 826{
516 WL head; 827 WL head;
517 sig_atomic_t volatile gotsig; 828 EV_ATOMIC_T gotsig;
518} ANSIG; 829} ANSIG;
519 830
520static ANSIG *signals; 831static ANSIG *signals;
521static int signalmax; 832static int signalmax;
522 833
523static int sigpipe [2]; 834static EV_ATOMIC_T gotsig;
524static sig_atomic_t volatile gotsig;
525static struct ev_io sigev;
526 835
527static void 836void inline_size
528signals_init (ANSIG *base, int count) 837signals_init (ANSIG *base, int count)
529{ 838{
530 while (count--) 839 while (count--)
531 { 840 {
532 base->head = 0; 841 base->head = 0;
… …
534 843
535 ++base; 844 ++base;
536 } 845 }
537} 846}
538 847
848/*****************************************************************************/
849
850void inline_speed
851fd_intern (int fd)
852{
853#ifdef _WIN32
854 int arg = 1;
855 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
856#else
857 fcntl (fd, F_SETFD, FD_CLOEXEC);
858 fcntl (fd, F_SETFL, O_NONBLOCK);
859#endif
860}
861
862static void noinline
863evpipe_init (EV_P)
864{
865 if (!ev_is_active (&pipeev))
866 {
867#if EV_USE_EVENTFD
868 if ((evfd = eventfd (0, 0)) >= 0)
869 {
870 evpipe [0] = -1;
871 fd_intern (evfd);
872 ev_io_set (&pipeev, evfd, EV_READ);
873 }
874 else
875#endif
876 {
877 while (pipe (evpipe))
878 syserr ("(libev) error creating signal/async pipe");
879
880 fd_intern (evpipe [0]);
881 fd_intern (evpipe [1]);
882 ev_io_set (&pipeev, evpipe [0], EV_READ);
883 }
884
885 ev_io_start (EV_A_ &pipeev);
886 ev_unref (EV_A); /* watcher should not keep loop alive */
887 }
888}
889
890void inline_size
891evpipe_write (EV_P_ EV_ATOMIC_T *flag)
892{
893 if (!*flag)
894 {
895 int old_errno = errno; /* save errno because write might clobber it */
896
897 *flag = 1;
898
899#if EV_USE_EVENTFD
900 if (evfd >= 0)
901 {
902 uint64_t counter = 1;
903 write (evfd, &counter, sizeof (uint64_t));
904 }
905 else
906#endif
907 write (evpipe [1], &old_errno, 1);
908
909 errno = old_errno;
910 }
911}
912
539static void 913static void
914pipecb (EV_P_ ev_io *iow, int revents)
915{
916#if EV_USE_EVENTFD
917 if (evfd >= 0)
918 {
919 uint64_t counter;
920 read (evfd, &counter, sizeof (uint64_t));
921 }
922 else
923#endif
924 {
925 char dummy;
926 read (evpipe [0], &dummy, 1);
927 }
928
929 if (gotsig && ev_is_default_loop (EV_A))
930 {
931 int signum;
932 gotsig = 0;
933
934 for (signum = signalmax; signum--; )
935 if (signals [signum].gotsig)
936 ev_feed_signal_event (EV_A_ signum + 1);
937 }
938
939#if EV_ASYNC_ENABLE
940 if (gotasync)
941 {
942 int i;
943 gotasync = 0;
944
945 for (i = asynccnt; i--; )
946 if (asyncs [i]->sent)
947 {
948 asyncs [i]->sent = 0;
949 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
950 }
951 }
952#endif
953}
954
955/*****************************************************************************/
956
957static void
540sighandler (int signum) 958ev_sighandler (int signum)
541{ 959{
960#if EV_MULTIPLICITY
961 struct ev_loop *loop = &default_loop_struct;
962#endif
963
542#if WIN32 964#if _WIN32
543 signal (signum, sighandler); 965 signal (signum, ev_sighandler);
544#endif 966#endif
545 967
546 signals [signum - 1].gotsig = 1; 968 signals [signum - 1].gotsig = 1;
547 969 evpipe_write (EV_A_ &gotsig);
548 if (!gotsig)
549 {
550 int old_errno = errno;
551 gotsig = 1;
552 write (sigpipe [1], &signum, 1);
553 errno = old_errno;
554 }
555} 970}
556 971
557static void 972void noinline
558sigcb (EV_P_ struct ev_io *iow, int revents) 973ev_feed_signal_event (EV_P_ int signum)
559{ 974{
560 WL w; 975 WL w;
976
977#if EV_MULTIPLICITY
978 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
979#endif
980
561 int signum; 981 --signum;
562 982
563 read (sigpipe [0], &revents, 1); 983 if (signum < 0 || signum >= signalmax)
564 gotsig = 0; 984 return;
565 985
566 for (signum = signalmax; signum--; )
567 if (signals [signum].gotsig)
568 {
569 signals [signum].gotsig = 0; 986 signals [signum].gotsig = 0;
570 987
571 for (w = signals [signum].head; w; w = w->next) 988 for (w = signals [signum].head; w; w = w->next)
572 event (EV_A_ (W)w, EV_SIGNAL); 989 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
573 }
574}
575
576static void
577siginit (EV_P)
578{
579#ifndef WIN32
580 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
581 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
582
583 /* rather than sort out wether we really need nb, set it */
584 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
585 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
586#endif
587
588 ev_io_set (&sigev, sigpipe [0], EV_READ);
589 ev_io_start (EV_A_ &sigev);
590 ev_unref (EV_A); /* child watcher should not keep loop alive */
591} 990}
592 991
593/*****************************************************************************/ 992/*****************************************************************************/
594 993
595static struct ev_child *childs [PID_HASHSIZE]; 994static WL childs [EV_PID_HASHSIZE];
596 995
597#ifndef WIN32 996#ifndef _WIN32
598 997
599static struct ev_signal childev; 998static ev_signal childev;
999
1000#ifndef WIFCONTINUED
1001# define WIFCONTINUED(status) 0
1002#endif
1003
1004void inline_speed
1005child_reap (EV_P_ int chain, int pid, int status)
1006{
1007 ev_child *w;
1008 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1009
1010 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1011 {
1012 if ((w->pid == pid || !w->pid)
1013 && (!traced || (w->flags & 1)))
1014 {
1015 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1016 w->rpid = pid;
1017 w->rstatus = status;
1018 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1019 }
1020 }
1021}
600 1022
601#ifndef WCONTINUED 1023#ifndef WCONTINUED
602# define WCONTINUED 0 1024# define WCONTINUED 0
603#endif 1025#endif
604 1026
605static void 1027static void
606child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
607{
608 struct ev_child *w;
609
610 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
611 if (w->pid == pid || !w->pid)
612 {
613 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
614 w->rpid = pid;
615 w->rstatus = status;
616 event (EV_A_ (W)w, EV_CHILD);
617 }
618}
619
620static void
621childcb (EV_P_ struct ev_signal *sw, int revents) 1028childcb (EV_P_ ev_signal *sw, int revents)
622{ 1029{
623 int pid, status; 1030 int pid, status;
624 1031
1032 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
625 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1033 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
626 { 1034 if (!WCONTINUED
1035 || errno != EINVAL
1036 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1037 return;
1038
627 /* make sure we are called again until all childs have been reaped */ 1039 /* make sure we are called again until all children have been reaped */
1040 /* we need to do it this way so that the callback gets called before we continue */
628 event (EV_A_ (W)sw, EV_SIGNAL); 1041 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
629 1042
630 child_reap (EV_A_ sw, pid, pid, status); 1043 child_reap (EV_A_ pid, pid, status);
1044 if (EV_PID_HASHSIZE > 1)
631 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1045 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
632 }
633} 1046}
634 1047
635#endif 1048#endif
636 1049
637/*****************************************************************************/ 1050/*****************************************************************************/
638 1051
1052#if EV_USE_PORT
1053# include "ev_port.c"
1054#endif
639#if EV_USE_KQUEUE 1055#if EV_USE_KQUEUE
640# include "ev_kqueue.c" 1056# include "ev_kqueue.c"
641#endif 1057#endif
642#if EV_USE_EPOLL 1058#if EV_USE_EPOLL
643# include "ev_epoll.c" 1059# include "ev_epoll.c"
… …
660{ 1076{
661 return EV_VERSION_MINOR; 1077 return EV_VERSION_MINOR;
662} 1078}
663 1079
664/* return true if we are running with elevated privileges and should ignore env variables */ 1080/* return true if we are running with elevated privileges and should ignore env variables */
665static int 1081int inline_size
666enable_secure (void) 1082enable_secure (void)
667{ 1083{
668#ifdef WIN32 1084#ifdef _WIN32
669 return 0; 1085 return 0;
670#else 1086#else
671 return getuid () != geteuid () 1087 return getuid () != geteuid ()
672 || getgid () != getegid (); 1088 || getgid () != getegid ();
673#endif 1089#endif
674} 1090}
675 1091
676int 1092unsigned int
677ev_method (EV_P) 1093ev_supported_backends (void)
678{ 1094{
679 return method; 1095 unsigned int flags = 0;
680}
681 1096
682static void 1097 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
683loop_init (EV_P_ int methods) 1098 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1099 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1100 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1101 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1102
1103 return flags;
1104}
1105
1106unsigned int
1107ev_recommended_backends (void)
684{ 1108{
685 if (!method) 1109 unsigned int flags = ev_supported_backends ();
1110
1111#ifndef __NetBSD__
1112 /* kqueue is borked on everything but netbsd apparently */
1113 /* it usually doesn't work correctly on anything but sockets and pipes */
1114 flags &= ~EVBACKEND_KQUEUE;
1115#endif
1116#ifdef __APPLE__
1117 // flags &= ~EVBACKEND_KQUEUE; for documentation
1118 flags &= ~EVBACKEND_POLL;
1119#endif
1120
1121 return flags;
1122}
1123
1124unsigned int
1125ev_embeddable_backends (void)
1126{
1127 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1128
1129 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1130 /* please fix it and tell me how to detect the fix */
1131 flags &= ~EVBACKEND_EPOLL;
1132
1133 return flags;
1134}
1135
1136unsigned int
1137ev_backend (EV_P)
1138{
1139 return backend;
1140}
1141
1142unsigned int
1143ev_loop_count (EV_P)
1144{
1145 return loop_count;
1146}
1147
1148void
1149ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1150{
1151 io_blocktime = interval;
1152}
1153
1154void
1155ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1156{
1157 timeout_blocktime = interval;
1158}
1159
1160static void noinline
1161loop_init (EV_P_ unsigned int flags)
1162{
1163 if (!backend)
686 { 1164 {
687#if EV_USE_MONOTONIC 1165#if EV_USE_MONOTONIC
688 { 1166 {
689 struct timespec ts; 1167 struct timespec ts;
690 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1168 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
691 have_monotonic = 1; 1169 have_monotonic = 1;
692 } 1170 }
693#endif 1171#endif
694 1172
695 rt_now = ev_time (); 1173 ev_rt_now = ev_time ();
696 mn_now = get_clock (); 1174 mn_now = get_clock ();
697 now_floor = mn_now; 1175 now_floor = mn_now;
698 rtmn_diff = rt_now - mn_now; 1176 rtmn_diff = ev_rt_now - mn_now;
699 1177
700 if (methods == EVMETHOD_AUTO) 1178 io_blocktime = 0.;
701 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1179 timeout_blocktime = 0.;
1180 backend = 0;
1181 backend_fd = -1;
1182 gotasync = 0;
1183#if EV_USE_INOTIFY
1184 fs_fd = -2;
1185#endif
1186
1187 /* pid check not overridable via env */
1188#ifndef _WIN32
1189 if (flags & EVFLAG_FORKCHECK)
1190 curpid = getpid ();
1191#endif
1192
1193 if (!(flags & EVFLAG_NOENV)
1194 && !enable_secure ()
1195 && getenv ("LIBEV_FLAGS"))
702 methods = atoi (getenv ("LIBEV_METHODS")); 1196 flags = atoi (getenv ("LIBEV_FLAGS"));
703 else
704 methods = EVMETHOD_ANY;
705 1197
706 method = 0; 1198 if (!(flags & 0x0000ffffU))
707#if EV_USE_WIN32 1199 flags |= ev_recommended_backends ();
708 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1200
1201#if EV_USE_PORT
1202 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
709#endif 1203#endif
710#if EV_USE_KQUEUE 1204#if EV_USE_KQUEUE
711 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1205 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
712#endif 1206#endif
713#if EV_USE_EPOLL 1207#if EV_USE_EPOLL
714 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1208 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
715#endif 1209#endif
716#if EV_USE_POLL 1210#if EV_USE_POLL
717 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1211 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
718#endif 1212#endif
719#if EV_USE_SELECT 1213#if EV_USE_SELECT
720 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1214 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
721#endif 1215#endif
722 1216
723 ev_watcher_init (&sigev, sigcb); 1217 ev_init (&pipeev, pipecb);
724 ev_set_priority (&sigev, EV_MAXPRI); 1218 ev_set_priority (&pipeev, EV_MAXPRI);
725 } 1219 }
726} 1220}
727 1221
728void 1222static void noinline
729loop_destroy (EV_P) 1223loop_destroy (EV_P)
730{ 1224{
731 int i; 1225 int i;
732 1226
1227 if (ev_is_active (&pipeev))
1228 {
1229 ev_ref (EV_A); /* signal watcher */
1230 ev_io_stop (EV_A_ &pipeev);
1231
1232#if EV_USE_EVENTFD
1233 if (evfd >= 0)
1234 close (evfd);
1235#endif
1236
1237 if (evpipe [0] >= 0)
1238 {
1239 close (evpipe [0]);
1240 close (evpipe [1]);
1241 }
1242 }
1243
733#if EV_USE_WIN32 1244#if EV_USE_INOTIFY
734 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1245 if (fs_fd >= 0)
1246 close (fs_fd);
1247#endif
1248
1249 if (backend_fd >= 0)
1250 close (backend_fd);
1251
1252#if EV_USE_PORT
1253 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
735#endif 1254#endif
736#if EV_USE_KQUEUE 1255#if EV_USE_KQUEUE
737 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1256 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
738#endif 1257#endif
739#if EV_USE_EPOLL 1258#if EV_USE_EPOLL
740 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1259 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
741#endif 1260#endif
742#if EV_USE_POLL 1261#if EV_USE_POLL
743 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1262 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
744#endif 1263#endif
745#if EV_USE_SELECT 1264#if EV_USE_SELECT
746 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1265 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
747#endif 1266#endif
748 1267
749 for (i = NUMPRI; i--; ) 1268 for (i = NUMPRI; i--; )
1269 {
750 array_free (pending, [i]); 1270 array_free (pending, [i]);
1271#if EV_IDLE_ENABLE
1272 array_free (idle, [i]);
1273#endif
1274 }
1275
1276 ev_free (anfds); anfdmax = 0;
751 1277
752 /* have to use the microsoft-never-gets-it-right macro */ 1278 /* have to use the microsoft-never-gets-it-right macro */
753 array_free_microshit (fdchange); 1279 array_free (fdchange, EMPTY);
754 array_free_microshit (timer); 1280 array_free (timer, EMPTY);
755 array_free_microshit (periodic); 1281#if EV_PERIODIC_ENABLE
756 array_free_microshit (idle); 1282 array_free (periodic, EMPTY);
757 array_free_microshit (prepare); 1283#endif
758 array_free_microshit (check); 1284#if EV_FORK_ENABLE
1285 array_free (fork, EMPTY);
1286#endif
1287 array_free (prepare, EMPTY);
1288 array_free (check, EMPTY);
1289#if EV_ASYNC_ENABLE
1290 array_free (async, EMPTY);
1291#endif
759 1292
760 method = 0; 1293 backend = 0;
761} 1294}
762 1295
763static void 1296#if EV_USE_INOTIFY
1297void inline_size infy_fork (EV_P);
1298#endif
1299
1300void inline_size
764loop_fork (EV_P) 1301loop_fork (EV_P)
765{ 1302{
1303#if EV_USE_PORT
1304 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1305#endif
1306#if EV_USE_KQUEUE
1307 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1308#endif
766#if EV_USE_EPOLL 1309#if EV_USE_EPOLL
767 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1310 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
768#endif 1311#endif
769#if EV_USE_KQUEUE 1312#if EV_USE_INOTIFY
770 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1313 infy_fork (EV_A);
771#endif 1314#endif
772 1315
773 if (ev_is_active (&sigev)) 1316 if (ev_is_active (&pipeev))
774 { 1317 {
775 /* default loop */ 1318 /* this "locks" the handlers against writing to the pipe */
1319 /* while we modify the fd vars */
1320 gotsig = 1;
1321#if EV_ASYNC_ENABLE
1322 gotasync = 1;
1323#endif
776 1324
777 ev_ref (EV_A); 1325 ev_ref (EV_A);
778 ev_io_stop (EV_A_ &sigev); 1326 ev_io_stop (EV_A_ &pipeev);
1327
1328#if EV_USE_EVENTFD
1329 if (evfd >= 0)
1330 close (evfd);
1331#endif
1332
1333 if (evpipe [0] >= 0)
1334 {
779 close (sigpipe [0]); 1335 close (evpipe [0]);
780 close (sigpipe [1]); 1336 close (evpipe [1]);
1337 }
781 1338
782 while (pipe (sigpipe))
783 syserr ("(libev) error creating pipe");
784
785 siginit (EV_A); 1339 evpipe_init (EV_A);
1340 /* now iterate over everything, in case we missed something */
1341 pipecb (EV_A_ &pipeev, EV_READ);
786 } 1342 }
787 1343
788 postfork = 0; 1344 postfork = 0;
789} 1345}
790 1346
791#if EV_MULTIPLICITY 1347#if EV_MULTIPLICITY
792struct ev_loop * 1348struct ev_loop *
793ev_loop_new (int methods) 1349ev_loop_new (unsigned int flags)
794{ 1350{
795 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1351 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
796 1352
797 memset (loop, 0, sizeof (struct ev_loop)); 1353 memset (loop, 0, sizeof (struct ev_loop));
798 1354
799 loop_init (EV_A_ methods); 1355 loop_init (EV_A_ flags);
800 1356
801 if (ev_method (EV_A)) 1357 if (ev_backend (EV_A))
802 return loop; 1358 return loop;
803 1359
804 return 0; 1360 return 0;
805} 1361}
806 1362
… …
812} 1368}
813 1369
814void 1370void
815ev_loop_fork (EV_P) 1371ev_loop_fork (EV_P)
816{ 1372{
817 postfork = 1; 1373 postfork = 1; /* must be in line with ev_default_fork */
818} 1374}
819
820#endif 1375#endif
821 1376
822#if EV_MULTIPLICITY 1377#if EV_MULTIPLICITY
823struct ev_loop default_loop_struct;
824static struct ev_loop *default_loop;
825
826struct ev_loop * 1378struct ev_loop *
1379ev_default_loop_init (unsigned int flags)
827#else 1380#else
828static int default_loop;
829
830int 1381int
1382ev_default_loop (unsigned int flags)
831#endif 1383#endif
832ev_default_loop (int methods)
833{ 1384{
834 if (sigpipe [0] == sigpipe [1])
835 if (pipe (sigpipe))
836 return 0;
837
838 if (!default_loop) 1385 if (!ev_default_loop_ptr)
839 { 1386 {
840#if EV_MULTIPLICITY 1387#if EV_MULTIPLICITY
841 struct ev_loop *loop = default_loop = &default_loop_struct; 1388 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
842#else 1389#else
843 default_loop = 1; 1390 ev_default_loop_ptr = 1;
844#endif 1391#endif
845 1392
846 loop_init (EV_A_ methods); 1393 loop_init (EV_A_ flags);
847 1394
848 if (ev_method (EV_A)) 1395 if (ev_backend (EV_A))
849 { 1396 {
850 siginit (EV_A);
851
852#ifndef WIN32 1397#ifndef _WIN32
853 ev_signal_init (&childev, childcb, SIGCHLD); 1398 ev_signal_init (&childev, childcb, SIGCHLD);
854 ev_set_priority (&childev, EV_MAXPRI); 1399 ev_set_priority (&childev, EV_MAXPRI);
855 ev_signal_start (EV_A_ &childev); 1400 ev_signal_start (EV_A_ &childev);
856 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1401 ev_unref (EV_A); /* child watcher should not keep loop alive */
857#endif 1402#endif
858 } 1403 }
859 else 1404 else
860 default_loop = 0; 1405 ev_default_loop_ptr = 0;
861 } 1406 }
862 1407
863 return default_loop; 1408 return ev_default_loop_ptr;
864} 1409}
865 1410
866void 1411void
867ev_default_destroy (void) 1412ev_default_destroy (void)
868{ 1413{
869#if EV_MULTIPLICITY 1414#if EV_MULTIPLICITY
870 struct ev_loop *loop = default_loop; 1415 struct ev_loop *loop = ev_default_loop_ptr;
871#endif 1416#endif
872 1417
873#ifndef WIN32 1418#ifndef _WIN32
874 ev_ref (EV_A); /* child watcher */ 1419 ev_ref (EV_A); /* child watcher */
875 ev_signal_stop (EV_A_ &childev); 1420 ev_signal_stop (EV_A_ &childev);
876#endif 1421#endif
877 1422
878 ev_ref (EV_A); /* signal watcher */
879 ev_io_stop (EV_A_ &sigev);
880
881 close (sigpipe [0]); sigpipe [0] = 0;
882 close (sigpipe [1]); sigpipe [1] = 0;
883
884 loop_destroy (EV_A); 1423 loop_destroy (EV_A);
885} 1424}
886 1425
887void 1426void
888ev_default_fork (void) 1427ev_default_fork (void)
889{ 1428{
890#if EV_MULTIPLICITY 1429#if EV_MULTIPLICITY
891 struct ev_loop *loop = default_loop; 1430 struct ev_loop *loop = ev_default_loop_ptr;
892#endif 1431#endif
893 1432
894 if (method) 1433 if (backend)
895 postfork = 1; 1434 postfork = 1; /* must be in line with ev_loop_fork */
896} 1435}
897 1436
898/*****************************************************************************/ 1437/*****************************************************************************/
899 1438
900static void 1439void
1440ev_invoke (EV_P_ void *w, int revents)
1441{
1442 EV_CB_INVOKE ((W)w, revents);
1443}
1444
1445void inline_speed
901call_pending (EV_P) 1446call_pending (EV_P)
902{ 1447{
903 int pri; 1448 int pri;
904 1449
905 for (pri = NUMPRI; pri--; ) 1450 for (pri = NUMPRI; pri--; )
906 while (pendingcnt [pri]) 1451 while (pendingcnt [pri])
907 { 1452 {
908 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1453 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
909 1454
910 if (p->w) 1455 if (expect_true (p->w))
911 { 1456 {
1457 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1458
912 p->w->pending = 0; 1459 p->w->pending = 0;
913 p->w->cb (EV_A_ p->w, p->events); 1460 EV_CB_INVOKE (p->w, p->events);
914 } 1461 }
915 } 1462 }
916} 1463}
917 1464
918static void 1465#if EV_IDLE_ENABLE
1466void inline_size
1467idle_reify (EV_P)
1468{
1469 if (expect_false (idleall))
1470 {
1471 int pri;
1472
1473 for (pri = NUMPRI; pri--; )
1474 {
1475 if (pendingcnt [pri])
1476 break;
1477
1478 if (idlecnt [pri])
1479 {
1480 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1481 break;
1482 }
1483 }
1484 }
1485}
1486#endif
1487
1488void inline_size
919timers_reify (EV_P) 1489timers_reify (EV_P)
920{ 1490{
921 while (timercnt && ((WT)timers [0])->at <= mn_now) 1491 while (timercnt && ev_at (timers [1]) <= mn_now)
922 { 1492 {
923 struct ev_timer *w = timers [0]; 1493 ev_timer *w = (ev_timer *)timers [1];
924 1494
925 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1495 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
926 1496
927 /* first reschedule or stop timer */ 1497 /* first reschedule or stop timer */
928 if (w->repeat) 1498 if (w->repeat)
929 { 1499 {
930 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1500 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
931 ((WT)w)->at = mn_now + w->repeat; 1501
1502 ev_at (w) += w->repeat;
1503 if (ev_at (w) < mn_now)
1504 ev_at (w) = mn_now;
1505
932 downheap ((WT *)timers, timercnt, 0); 1506 downheap (timers, timercnt, 1);
933 } 1507 }
934 else 1508 else
935 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1509 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
936 1510
937 event (EV_A_ (W)w, EV_TIMEOUT); 1511 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
938 } 1512 }
939} 1513}
940 1514
941static void 1515#if EV_PERIODIC_ENABLE
1516void inline_size
942periodics_reify (EV_P) 1517periodics_reify (EV_P)
943{ 1518{
944 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 1519 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
945 { 1520 {
946 struct ev_periodic *w = periodics [0]; 1521 ev_periodic *w = (ev_periodic *)periodics [1];
947 1522
948 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1523 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
949 1524
950 /* first reschedule or stop timer */ 1525 /* first reschedule or stop timer */
951 if (w->interval) 1526 if (w->reschedule_cb)
952 { 1527 {
953 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1528 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
954 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); 1529 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
955 downheap ((WT *)periodics, periodiccnt, 0); 1530 downheap (periodics, periodiccnt, 1);
1531 }
1532 else if (w->interval)
1533 {
1534 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1535 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1536 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1537 downheap (periodics, periodiccnt, 1);
956 } 1538 }
957 else 1539 else
958 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1540 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
959 1541
960 event (EV_A_ (W)w, EV_PERIODIC); 1542 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
961 } 1543 }
962} 1544}
963 1545
964static void 1546static void noinline
965periodics_reschedule (EV_P) 1547periodics_reschedule (EV_P)
966{ 1548{
967 int i; 1549 int i;
968 1550
969 /* adjust periodics after time jump */ 1551 /* adjust periodics after time jump */
970 for (i = 0; i < periodiccnt; ++i) 1552 for (i = 1; i <= periodiccnt; ++i)
971 { 1553 {
972 struct ev_periodic *w = periodics [i]; 1554 ev_periodic *w = (ev_periodic *)periodics [i];
973 1555
1556 if (w->reschedule_cb)
1557 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
974 if (w->interval) 1558 else if (w->interval)
975 {
976 ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1559 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
977
978 if (fabs (diff) >= 1e-4)
979 {
980 ev_periodic_stop (EV_A_ w);
981 ev_periodic_start (EV_A_ w);
982
983 i = 0; /* restart loop, inefficient, but time jumps should be rare */
984 }
985 }
986 }
987}
988
989inline int
990time_update_monotonic (EV_P)
991{
992 mn_now = get_clock ();
993
994 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
995 { 1560 }
996 rt_now = rtmn_diff + mn_now;
997 return 0;
998 }
999 else
1000 {
1001 now_floor = mn_now;
1002 rt_now = ev_time ();
1003 return 1;
1004 }
1005}
1006 1561
1007static void 1562 /* now rebuild the heap */
1008time_update (EV_P) 1563 for (i = periodiccnt >> 1; i--; )
1564 downheap (periodics, periodiccnt, i);
1565}
1566#endif
1567
1568void inline_speed
1569time_update (EV_P_ ev_tstamp max_block)
1009{ 1570{
1010 int i; 1571 int i;
1011 1572
1012#if EV_USE_MONOTONIC 1573#if EV_USE_MONOTONIC
1013 if (expect_true (have_monotonic)) 1574 if (expect_true (have_monotonic))
1014 { 1575 {
1015 if (time_update_monotonic (EV_A)) 1576 ev_tstamp odiff = rtmn_diff;
1577
1578 mn_now = get_clock ();
1579
1580 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1581 /* interpolate in the meantime */
1582 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1016 { 1583 {
1017 ev_tstamp odiff = rtmn_diff; 1584 ev_rt_now = rtmn_diff + mn_now;
1585 return;
1586 }
1018 1587
1588 now_floor = mn_now;
1589 ev_rt_now = ev_time ();
1590
1019 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1591 /* loop a few times, before making important decisions.
1592 * on the choice of "4": one iteration isn't enough,
1593 * in case we get preempted during the calls to
1594 * ev_time and get_clock. a second call is almost guaranteed
1595 * to succeed in that case, though. and looping a few more times
1596 * doesn't hurt either as we only do this on time-jumps or
1597 * in the unlikely event of having been preempted here.
1598 */
1599 for (i = 4; --i; )
1020 { 1600 {
1021 rtmn_diff = rt_now - mn_now; 1601 rtmn_diff = ev_rt_now - mn_now;
1022 1602
1023 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1603 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1024 return; /* all is well */ 1604 return; /* all is well */
1025 1605
1026 rt_now = ev_time (); 1606 ev_rt_now = ev_time ();
1027 mn_now = get_clock (); 1607 mn_now = get_clock ();
1028 now_floor = mn_now; 1608 now_floor = mn_now;
1029 } 1609 }
1030 1610
1611# if EV_PERIODIC_ENABLE
1612 periodics_reschedule (EV_A);
1613# endif
1614 /* no timer adjustment, as the monotonic clock doesn't jump */
1615 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1616 }
1617 else
1618#endif
1619 {
1620 ev_rt_now = ev_time ();
1621
1622 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1623 {
1624#if EV_PERIODIC_ENABLE
1031 periodics_reschedule (EV_A); 1625 periodics_reschedule (EV_A);
1032 /* no timer adjustment, as the monotonic clock doesn't jump */ 1626#endif
1033 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1627 /* adjust timers. this is easy, as the offset is the same for all of them */
1628 for (i = 1; i <= timercnt; ++i)
1629 ev_at (timers [i]) += ev_rt_now - mn_now;
1034 } 1630 }
1035 }
1036 else
1037#endif
1038 {
1039 rt_now = ev_time ();
1040 1631
1041 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1042 {
1043 periodics_reschedule (EV_A);
1044
1045 /* adjust timers. this is easy, as the offset is the same for all */
1046 for (i = 0; i < timercnt; ++i)
1047 ((WT)timers [i])->at += rt_now - mn_now;
1048 }
1049
1050 mn_now = rt_now; 1632 mn_now = ev_rt_now;
1051 } 1633 }
1052} 1634}
1053 1635
1054void 1636void
1055ev_ref (EV_P) 1637ev_ref (EV_P)
… …
1066static int loop_done; 1648static int loop_done;
1067 1649
1068void 1650void
1069ev_loop (EV_P_ int flags) 1651ev_loop (EV_P_ int flags)
1070{ 1652{
1071 double block; 1653 loop_done = EVUNLOOP_CANCEL;
1072 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1654
1655 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1073 1656
1074 do 1657 do
1075 { 1658 {
1659#ifndef _WIN32
1660 if (expect_false (curpid)) /* penalise the forking check even more */
1661 if (expect_false (getpid () != curpid))
1662 {
1663 curpid = getpid ();
1664 postfork = 1;
1665 }
1666#endif
1667
1668#if EV_FORK_ENABLE
1669 /* we might have forked, so queue fork handlers */
1670 if (expect_false (postfork))
1671 if (forkcnt)
1672 {
1673 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1674 call_pending (EV_A);
1675 }
1676#endif
1677
1076 /* queue check watchers (and execute them) */ 1678 /* queue prepare watchers (and execute them) */
1077 if (expect_false (preparecnt)) 1679 if (expect_false (preparecnt))
1078 { 1680 {
1079 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1681 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1080 call_pending (EV_A); 1682 call_pending (EV_A);
1081 } 1683 }
1082 1684
1685 if (expect_false (!activecnt))
1686 break;
1687
1083 /* we might have forked, so reify kernel state if necessary */ 1688 /* we might have forked, so reify kernel state if necessary */
1084 if (expect_false (postfork)) 1689 if (expect_false (postfork))
1085 loop_fork (EV_A); 1690 loop_fork (EV_A);
1086 1691
1087 /* update fd-related kernel structures */ 1692 /* update fd-related kernel structures */
1088 fd_reify (EV_A); 1693 fd_reify (EV_A);
1089 1694
1090 /* calculate blocking time */ 1695 /* calculate blocking time */
1696 {
1697 ev_tstamp waittime = 0.;
1698 ev_tstamp sleeptime = 0.;
1091 1699
1092 /* we only need this for !monotonic clockor timers, but as we basically 1700 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1093 always have timers, we just calculate it always */
1094#if EV_USE_MONOTONIC
1095 if (expect_true (have_monotonic))
1096 time_update_monotonic (EV_A);
1097 else
1098#endif
1099 { 1701 {
1100 rt_now = ev_time (); 1702 /* update time to cancel out callback processing overhead */
1101 mn_now = rt_now; 1703 time_update (EV_A_ 1e100);
1102 }
1103 1704
1104 if (flags & EVLOOP_NONBLOCK || idlecnt)
1105 block = 0.;
1106 else
1107 {
1108 block = MAX_BLOCKTIME; 1705 waittime = MAX_BLOCKTIME;
1109 1706
1110 if (timercnt) 1707 if (timercnt)
1111 { 1708 {
1112 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1709 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
1113 if (block > to) block = to; 1710 if (waittime > to) waittime = to;
1114 } 1711 }
1115 1712
1713#if EV_PERIODIC_ENABLE
1116 if (periodiccnt) 1714 if (periodiccnt)
1117 { 1715 {
1118 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 1716 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
1119 if (block > to) block = to; 1717 if (waittime > to) waittime = to;
1120 } 1718 }
1719#endif
1121 1720
1122 if (block < 0.) block = 0.; 1721 if (expect_false (waittime < timeout_blocktime))
1722 waittime = timeout_blocktime;
1723
1724 sleeptime = waittime - backend_fudge;
1725
1726 if (expect_true (sleeptime > io_blocktime))
1727 sleeptime = io_blocktime;
1728
1729 if (sleeptime)
1730 {
1731 ev_sleep (sleeptime);
1732 waittime -= sleeptime;
1733 }
1123 } 1734 }
1124 1735
1125 method_poll (EV_A_ block); 1736 ++loop_count;
1737 backend_poll (EV_A_ waittime);
1126 1738
1127 /* update rt_now, do magic */ 1739 /* update ev_rt_now, do magic */
1128 time_update (EV_A); 1740 time_update (EV_A_ waittime + sleeptime);
1741 }
1129 1742
1130 /* queue pending timers and reschedule them */ 1743 /* queue pending timers and reschedule them */
1131 timers_reify (EV_A); /* relative timers called last */ 1744 timers_reify (EV_A); /* relative timers called last */
1745#if EV_PERIODIC_ENABLE
1132 periodics_reify (EV_A); /* absolute timers called first */ 1746 periodics_reify (EV_A); /* absolute timers called first */
1747#endif
1133 1748
1749#if EV_IDLE_ENABLE
1134 /* queue idle watchers unless io or timers are pending */ 1750 /* queue idle watchers unless other events are pending */
1135 if (!pendingcnt) 1751 idle_reify (EV_A);
1136 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1752#endif
1137 1753
1138 /* queue check watchers, to be executed first */ 1754 /* queue check watchers, to be executed first */
1139 if (checkcnt) 1755 if (expect_false (checkcnt))
1140 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1756 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1141 1757
1142 call_pending (EV_A); 1758 call_pending (EV_A);
1143 } 1759 }
1144 while (activecnt && !loop_done); 1760 while (expect_true (
1761 activecnt
1762 && !loop_done
1763 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1764 ));
1145 1765
1146 if (loop_done != 2) 1766 if (loop_done == EVUNLOOP_ONE)
1147 loop_done = 0; 1767 loop_done = EVUNLOOP_CANCEL;
1148} 1768}
1149 1769
1150void 1770void
1151ev_unloop (EV_P_ int how) 1771ev_unloop (EV_P_ int how)
1152{ 1772{
1153 loop_done = how; 1773 loop_done = how;
1154} 1774}
1155 1775
1156/*****************************************************************************/ 1776/*****************************************************************************/
1157 1777
1158inline void 1778void inline_size
1159wlist_add (WL *head, WL elem) 1779wlist_add (WL *head, WL elem)
1160{ 1780{
1161 elem->next = *head; 1781 elem->next = *head;
1162 *head = elem; 1782 *head = elem;
1163} 1783}
1164 1784
1165inline void 1785void inline_size
1166wlist_del (WL *head, WL elem) 1786wlist_del (WL *head, WL elem)
1167{ 1787{
1168 while (*head) 1788 while (*head)
1169 { 1789 {
1170 if (*head == elem) 1790 if (*head == elem)
… …
1175 1795
1176 head = &(*head)->next; 1796 head = &(*head)->next;
1177 } 1797 }
1178} 1798}
1179 1799
1180inline void 1800void inline_speed
1181ev_clear_pending (EV_P_ W w) 1801clear_pending (EV_P_ W w)
1182{ 1802{
1183 if (w->pending) 1803 if (w->pending)
1184 { 1804 {
1185 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1805 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1186 w->pending = 0; 1806 w->pending = 0;
1187 } 1807 }
1188} 1808}
1189 1809
1190inline void 1810int
1811ev_clear_pending (EV_P_ void *w)
1812{
1813 W w_ = (W)w;
1814 int pending = w_->pending;
1815
1816 if (expect_true (pending))
1817 {
1818 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1819 w_->pending = 0;
1820 p->w = 0;
1821 return p->events;
1822 }
1823 else
1824 return 0;
1825}
1826
1827void inline_size
1828pri_adjust (EV_P_ W w)
1829{
1830 int pri = w->priority;
1831 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1832 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1833 w->priority = pri;
1834}
1835
1836void inline_speed
1191ev_start (EV_P_ W w, int active) 1837ev_start (EV_P_ W w, int active)
1192{ 1838{
1193 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1839 pri_adjust (EV_A_ w);
1194 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1195
1196 w->active = active; 1840 w->active = active;
1197 ev_ref (EV_A); 1841 ev_ref (EV_A);
1198} 1842}
1199 1843
1200inline void 1844void inline_size
1201ev_stop (EV_P_ W w) 1845ev_stop (EV_P_ W w)
1202{ 1846{
1203 ev_unref (EV_A); 1847 ev_unref (EV_A);
1204 w->active = 0; 1848 w->active = 0;
1205} 1849}
1206 1850
1207/*****************************************************************************/ 1851/*****************************************************************************/
1208 1852
1209void 1853void noinline
1210ev_io_start (EV_P_ struct ev_io *w) 1854ev_io_start (EV_P_ ev_io *w)
1211{ 1855{
1212 int fd = w->fd; 1856 int fd = w->fd;
1213 1857
1214 if (ev_is_active (w)) 1858 if (expect_false (ev_is_active (w)))
1215 return; 1859 return;
1216 1860
1217 assert (("ev_io_start called with negative fd", fd >= 0)); 1861 assert (("ev_io_start called with negative fd", fd >= 0));
1218 1862
1219 ev_start (EV_A_ (W)w, 1); 1863 ev_start (EV_A_ (W)w, 1);
1220 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1864 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1221 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1865 wlist_add (&anfds[fd].head, (WL)w);
1222 1866
1223 fd_change (EV_A_ fd); 1867 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1868 w->events &= ~EV_IOFDSET;
1224} 1869}
1225 1870
1226void 1871void noinline
1227ev_io_stop (EV_P_ struct ev_io *w) 1872ev_io_stop (EV_P_ ev_io *w)
1228{ 1873{
1229 ev_clear_pending (EV_A_ (W)w); 1874 clear_pending (EV_A_ (W)w);
1230 if (!ev_is_active (w)) 1875 if (expect_false (!ev_is_active (w)))
1231 return; 1876 return;
1232 1877
1878 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1879
1233 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1880 wlist_del (&anfds[w->fd].head, (WL)w);
1234 ev_stop (EV_A_ (W)w); 1881 ev_stop (EV_A_ (W)w);
1235 1882
1236 fd_change (EV_A_ w->fd); 1883 fd_change (EV_A_ w->fd, 1);
1237} 1884}
1238 1885
1239void 1886void noinline
1240ev_timer_start (EV_P_ struct ev_timer *w) 1887ev_timer_start (EV_P_ ev_timer *w)
1241{ 1888{
1242 if (ev_is_active (w)) 1889 if (expect_false (ev_is_active (w)))
1243 return; 1890 return;
1244 1891
1245 ((WT)w)->at += mn_now; 1892 ev_at (w) += mn_now;
1246 1893
1247 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1894 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1248 1895
1249 ev_start (EV_A_ (W)w, ++timercnt); 1896 ev_start (EV_A_ (W)w, ++timercnt);
1250 array_needsize (timers, timermax, timercnt, (void)); 1897 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
1251 timers [timercnt - 1] = w; 1898 timers [timercnt] = (WT)w;
1252 upheap ((WT *)timers, timercnt - 1); 1899 upheap (timers, timercnt);
1253 1900
1254 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1901 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1255} 1902}
1256 1903
1257void 1904void noinline
1258ev_timer_stop (EV_P_ struct ev_timer *w) 1905ev_timer_stop (EV_P_ ev_timer *w)
1259{ 1906{
1260 ev_clear_pending (EV_A_ (W)w); 1907 clear_pending (EV_A_ (W)w);
1261 if (!ev_is_active (w)) 1908 if (expect_false (!ev_is_active (w)))
1262 return; 1909 return;
1263 1910
1911 {
1912 int active = ev_active (w);
1913
1264 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1914 assert (("internal timer heap corruption", timers [active] == (WT)w));
1265 1915
1266 if (((W)w)->active < timercnt--) 1916 if (expect_true (active < timercnt))
1267 { 1917 {
1268 timers [((W)w)->active - 1] = timers [timercnt]; 1918 timers [active] = timers [timercnt];
1269 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1919 adjustheap (timers, timercnt, active);
1270 } 1920 }
1271 1921
1272 ((WT)w)->at = w->repeat; 1922 --timercnt;
1923 }
1924
1925 ev_at (w) -= mn_now;
1273 1926
1274 ev_stop (EV_A_ (W)w); 1927 ev_stop (EV_A_ (W)w);
1275} 1928}
1276 1929
1277void 1930void noinline
1278ev_timer_again (EV_P_ struct ev_timer *w) 1931ev_timer_again (EV_P_ ev_timer *w)
1279{ 1932{
1280 if (ev_is_active (w)) 1933 if (ev_is_active (w))
1281 { 1934 {
1282 if (w->repeat) 1935 if (w->repeat)
1283 { 1936 {
1284 ((WT)w)->at = mn_now + w->repeat; 1937 ev_at (w) = mn_now + w->repeat;
1285 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1938 adjustheap (timers, timercnt, ev_active (w));
1286 } 1939 }
1287 else 1940 else
1288 ev_timer_stop (EV_A_ w); 1941 ev_timer_stop (EV_A_ w);
1289 } 1942 }
1290 else if (w->repeat) 1943 else if (w->repeat)
1944 {
1945 ev_at (w) = w->repeat;
1291 ev_timer_start (EV_A_ w); 1946 ev_timer_start (EV_A_ w);
1947 }
1292} 1948}
1293 1949
1294void 1950#if EV_PERIODIC_ENABLE
1951void noinline
1295ev_periodic_start (EV_P_ struct ev_periodic *w) 1952ev_periodic_start (EV_P_ ev_periodic *w)
1296{ 1953{
1297 if (ev_is_active (w)) 1954 if (expect_false (ev_is_active (w)))
1298 return; 1955 return;
1299 1956
1957 if (w->reschedule_cb)
1958 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1959 else if (w->interval)
1960 {
1300 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 1961 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1301
1302 /* this formula differs from the one in periodic_reify because we do not always round up */ 1962 /* this formula differs from the one in periodic_reify because we do not always round up */
1303 if (w->interval)
1304 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1963 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1964 }
1965 else
1966 ev_at (w) = w->offset;
1305 1967
1306 ev_start (EV_A_ (W)w, ++periodiccnt); 1968 ev_start (EV_A_ (W)w, ++periodiccnt);
1307 array_needsize (periodics, periodicmax, periodiccnt, (void)); 1969 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
1308 periodics [periodiccnt - 1] = w; 1970 periodics [periodiccnt] = (WT)w;
1309 upheap ((WT *)periodics, periodiccnt - 1); 1971 upheap (periodics, periodiccnt);
1310 1972
1311 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1973 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1312} 1974}
1313 1975
1314void 1976void noinline
1315ev_periodic_stop (EV_P_ struct ev_periodic *w) 1977ev_periodic_stop (EV_P_ ev_periodic *w)
1316{ 1978{
1317 ev_clear_pending (EV_A_ (W)w); 1979 clear_pending (EV_A_ (W)w);
1318 if (!ev_is_active (w)) 1980 if (expect_false (!ev_is_active (w)))
1319 return; 1981 return;
1320 1982
1983 {
1984 int active = ev_active (w);
1985
1321 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1986 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1322 1987
1323 if (((W)w)->active < periodiccnt--) 1988 if (expect_true (active < periodiccnt))
1324 { 1989 {
1325 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 1990 periodics [active] = periodics [periodiccnt];
1326 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 1991 adjustheap (periodics, periodiccnt, active);
1327 } 1992 }
1993
1994 --periodiccnt;
1995 }
1328 1996
1329 ev_stop (EV_A_ (W)w); 1997 ev_stop (EV_A_ (W)w);
1330} 1998}
1331 1999
1332void 2000void noinline
1333ev_idle_start (EV_P_ struct ev_idle *w) 2001ev_periodic_again (EV_P_ ev_periodic *w)
1334{ 2002{
1335 if (ev_is_active (w)) 2003 /* TODO: use adjustheap and recalculation */
1336 return;
1337
1338 ev_start (EV_A_ (W)w, ++idlecnt);
1339 array_needsize (idles, idlemax, idlecnt, (void));
1340 idles [idlecnt - 1] = w;
1341}
1342
1343void
1344ev_idle_stop (EV_P_ struct ev_idle *w)
1345{
1346 ev_clear_pending (EV_A_ (W)w);
1347 if (ev_is_active (w))
1348 return;
1349
1350 idles [((W)w)->active - 1] = idles [--idlecnt];
1351 ev_stop (EV_A_ (W)w); 2004 ev_periodic_stop (EV_A_ w);
2005 ev_periodic_start (EV_A_ w);
1352} 2006}
1353 2007#endif
1354void
1355ev_prepare_start (EV_P_ struct ev_prepare *w)
1356{
1357 if (ev_is_active (w))
1358 return;
1359
1360 ev_start (EV_A_ (W)w, ++preparecnt);
1361 array_needsize (prepares, preparemax, preparecnt, (void));
1362 prepares [preparecnt - 1] = w;
1363}
1364
1365void
1366ev_prepare_stop (EV_P_ struct ev_prepare *w)
1367{
1368 ev_clear_pending (EV_A_ (W)w);
1369 if (ev_is_active (w))
1370 return;
1371
1372 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1373 ev_stop (EV_A_ (W)w);
1374}
1375
1376void
1377ev_check_start (EV_P_ struct ev_check *w)
1378{
1379 if (ev_is_active (w))
1380 return;
1381
1382 ev_start (EV_A_ (W)w, ++checkcnt);
1383 array_needsize (checks, checkmax, checkcnt, (void));
1384 checks [checkcnt - 1] = w;
1385}
1386
1387void
1388ev_check_stop (EV_P_ struct ev_check *w)
1389{
1390 ev_clear_pending (EV_A_ (W)w);
1391 if (ev_is_active (w))
1392 return;
1393
1394 checks [((W)w)->active - 1] = checks [--checkcnt];
1395 ev_stop (EV_A_ (W)w);
1396}
1397 2008
1398#ifndef SA_RESTART 2009#ifndef SA_RESTART
1399# define SA_RESTART 0 2010# define SA_RESTART 0
1400#endif 2011#endif
1401 2012
1402void 2013void noinline
1403ev_signal_start (EV_P_ struct ev_signal *w) 2014ev_signal_start (EV_P_ ev_signal *w)
1404{ 2015{
1405#if EV_MULTIPLICITY 2016#if EV_MULTIPLICITY
1406 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2017 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1407#endif 2018#endif
1408 if (ev_is_active (w)) 2019 if (expect_false (ev_is_active (w)))
1409 return; 2020 return;
1410 2021
1411 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2022 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1412 2023
2024 evpipe_init (EV_A);
2025
2026 {
2027#ifndef _WIN32
2028 sigset_t full, prev;
2029 sigfillset (&full);
2030 sigprocmask (SIG_SETMASK, &full, &prev);
2031#endif
2032
2033 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2034
2035#ifndef _WIN32
2036 sigprocmask (SIG_SETMASK, &prev, 0);
2037#endif
2038 }
2039
1413 ev_start (EV_A_ (W)w, 1); 2040 ev_start (EV_A_ (W)w, 1);
1414 array_needsize (signals, signalmax, w->signum, signals_init);
1415 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2041 wlist_add (&signals [w->signum - 1].head, (WL)w);
1416 2042
1417 if (!((WL)w)->next) 2043 if (!((WL)w)->next)
1418 { 2044 {
1419#if WIN32 2045#if _WIN32
1420 signal (w->signum, sighandler); 2046 signal (w->signum, ev_sighandler);
1421#else 2047#else
1422 struct sigaction sa; 2048 struct sigaction sa;
1423 sa.sa_handler = sighandler; 2049 sa.sa_handler = ev_sighandler;
1424 sigfillset (&sa.sa_mask); 2050 sigfillset (&sa.sa_mask);
1425 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2051 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1426 sigaction (w->signum, &sa, 0); 2052 sigaction (w->signum, &sa, 0);
1427#endif 2053#endif
1428 } 2054 }
1429} 2055}
1430 2056
1431void 2057void noinline
1432ev_signal_stop (EV_P_ struct ev_signal *w) 2058ev_signal_stop (EV_P_ ev_signal *w)
1433{ 2059{
1434 ev_clear_pending (EV_A_ (W)w); 2060 clear_pending (EV_A_ (W)w);
1435 if (!ev_is_active (w)) 2061 if (expect_false (!ev_is_active (w)))
1436 return; 2062 return;
1437 2063
1438 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2064 wlist_del (&signals [w->signum - 1].head, (WL)w);
1439 ev_stop (EV_A_ (W)w); 2065 ev_stop (EV_A_ (W)w);
1440 2066
1441 if (!signals [w->signum - 1].head) 2067 if (!signals [w->signum - 1].head)
1442 signal (w->signum, SIG_DFL); 2068 signal (w->signum, SIG_DFL);
1443} 2069}
1444 2070
1445void 2071void
1446ev_child_start (EV_P_ struct ev_child *w) 2072ev_child_start (EV_P_ ev_child *w)
1447{ 2073{
1448#if EV_MULTIPLICITY 2074#if EV_MULTIPLICITY
1449 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2075 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1450#endif 2076#endif
1451 if (ev_is_active (w)) 2077 if (expect_false (ev_is_active (w)))
1452 return; 2078 return;
1453 2079
1454 ev_start (EV_A_ (W)w, 1); 2080 ev_start (EV_A_ (W)w, 1);
1455 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2081 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1456} 2082}
1457 2083
1458void 2084void
1459ev_child_stop (EV_P_ struct ev_child *w) 2085ev_child_stop (EV_P_ ev_child *w)
1460{ 2086{
1461 ev_clear_pending (EV_A_ (W)w); 2087 clear_pending (EV_A_ (W)w);
1462 if (ev_is_active (w)) 2088 if (expect_false (!ev_is_active (w)))
1463 return; 2089 return;
1464 2090
1465 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2091 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1466 ev_stop (EV_A_ (W)w); 2092 ev_stop (EV_A_ (W)w);
1467} 2093}
1468 2094
2095#if EV_STAT_ENABLE
2096
2097# ifdef _WIN32
2098# undef lstat
2099# define lstat(a,b) _stati64 (a,b)
2100# endif
2101
2102#define DEF_STAT_INTERVAL 5.0074891
2103#define MIN_STAT_INTERVAL 0.1074891
2104
2105static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2106
2107#if EV_USE_INOTIFY
2108# define EV_INOTIFY_BUFSIZE 8192
2109
2110static void noinline
2111infy_add (EV_P_ ev_stat *w)
2112{
2113 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);
2114
2115 if (w->wd < 0)
2116 {
2117 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2118
2119 /* monitor some parent directory for speedup hints */
2120 /* note that exceeding the hardcoded limit is not a correctness issue, */
2121 /* but an efficiency issue only */
2122 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2123 {
2124 char path [4096];
2125 strcpy (path, w->path);
2126
2127 do
2128 {
2129 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2130 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2131
2132 char *pend = strrchr (path, '/');
2133
2134 if (!pend)
2135 break; /* whoops, no '/', complain to your admin */
2136
2137 *pend = 0;
2138 w->wd = inotify_add_watch (fs_fd, path, mask);
2139 }
2140 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2141 }
2142 }
2143 else
2144 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2145
2146 if (w->wd >= 0)
2147 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2148}
2149
2150static void noinline
2151infy_del (EV_P_ ev_stat *w)
2152{
2153 int slot;
2154 int wd = w->wd;
2155
2156 if (wd < 0)
2157 return;
2158
2159 w->wd = -2;
2160 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2161 wlist_del (&fs_hash [slot].head, (WL)w);
2162
2163 /* remove this watcher, if others are watching it, they will rearm */
2164 inotify_rm_watch (fs_fd, wd);
2165}
2166
2167static void noinline
2168infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2169{
2170 if (slot < 0)
2171 /* overflow, need to check for all hahs slots */
2172 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2173 infy_wd (EV_A_ slot, wd, ev);
2174 else
2175 {
2176 WL w_;
2177
2178 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2179 {
2180 ev_stat *w = (ev_stat *)w_;
2181 w_ = w_->next; /* lets us remove this watcher and all before it */
2182
2183 if (w->wd == wd || wd == -1)
2184 {
2185 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2186 {
2187 w->wd = -1;
2188 infy_add (EV_A_ w); /* re-add, no matter what */
2189 }
2190
2191 stat_timer_cb (EV_A_ &w->timer, 0);
2192 }
2193 }
2194 }
2195}
2196
2197static void
2198infy_cb (EV_P_ ev_io *w, int revents)
2199{
2200 char buf [EV_INOTIFY_BUFSIZE];
2201 struct inotify_event *ev = (struct inotify_event *)buf;
2202 int ofs;
2203 int len = read (fs_fd, buf, sizeof (buf));
2204
2205 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2206 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2207}
2208
2209void inline_size
2210infy_init (EV_P)
2211{
2212 if (fs_fd != -2)
2213 return;
2214
2215 fs_fd = inotify_init ();
2216
2217 if (fs_fd >= 0)
2218 {
2219 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2220 ev_set_priority (&fs_w, EV_MAXPRI);
2221 ev_io_start (EV_A_ &fs_w);
2222 }
2223}
2224
2225void inline_size
2226infy_fork (EV_P)
2227{
2228 int slot;
2229
2230 if (fs_fd < 0)
2231 return;
2232
2233 close (fs_fd);
2234 fs_fd = inotify_init ();
2235
2236 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2237 {
2238 WL w_ = fs_hash [slot].head;
2239 fs_hash [slot].head = 0;
2240
2241 while (w_)
2242 {
2243 ev_stat *w = (ev_stat *)w_;
2244 w_ = w_->next; /* lets us add this watcher */
2245
2246 w->wd = -1;
2247
2248 if (fs_fd >= 0)
2249 infy_add (EV_A_ w); /* re-add, no matter what */
2250 else
2251 ev_timer_start (EV_A_ &w->timer);
2252 }
2253
2254 }
2255}
2256
2257#endif
2258
2259void
2260ev_stat_stat (EV_P_ ev_stat *w)
2261{
2262 if (lstat (w->path, &w->attr) < 0)
2263 w->attr.st_nlink = 0;
2264 else if (!w->attr.st_nlink)
2265 w->attr.st_nlink = 1;
2266}
2267
2268static void noinline
2269stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2270{
2271 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2272
2273 /* we copy this here each the time so that */
2274 /* prev has the old value when the callback gets invoked */
2275 w->prev = w->attr;
2276 ev_stat_stat (EV_A_ w);
2277
2278 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2279 if (
2280 w->prev.st_dev != w->attr.st_dev
2281 || w->prev.st_ino != w->attr.st_ino
2282 || w->prev.st_mode != w->attr.st_mode
2283 || w->prev.st_nlink != w->attr.st_nlink
2284 || w->prev.st_uid != w->attr.st_uid
2285 || w->prev.st_gid != w->attr.st_gid
2286 || w->prev.st_rdev != w->attr.st_rdev
2287 || w->prev.st_size != w->attr.st_size
2288 || w->prev.st_atime != w->attr.st_atime
2289 || w->prev.st_mtime != w->attr.st_mtime
2290 || w->prev.st_ctime != w->attr.st_ctime
2291 ) {
2292 #if EV_USE_INOTIFY
2293 infy_del (EV_A_ w);
2294 infy_add (EV_A_ w);
2295 ev_stat_stat (EV_A_ w); /* avoid race... */
2296 #endif
2297
2298 ev_feed_event (EV_A_ w, EV_STAT);
2299 }
2300}
2301
2302void
2303ev_stat_start (EV_P_ ev_stat *w)
2304{
2305 if (expect_false (ev_is_active (w)))
2306 return;
2307
2308 /* since we use memcmp, we need to clear any padding data etc. */
2309 memset (&w->prev, 0, sizeof (ev_statdata));
2310 memset (&w->attr, 0, sizeof (ev_statdata));
2311
2312 ev_stat_stat (EV_A_ w);
2313
2314 if (w->interval < MIN_STAT_INTERVAL)
2315 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2316
2317 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2318 ev_set_priority (&w->timer, ev_priority (w));
2319
2320#if EV_USE_INOTIFY
2321 infy_init (EV_A);
2322
2323 if (fs_fd >= 0)
2324 infy_add (EV_A_ w);
2325 else
2326#endif
2327 ev_timer_start (EV_A_ &w->timer);
2328
2329 ev_start (EV_A_ (W)w, 1);
2330}
2331
2332void
2333ev_stat_stop (EV_P_ ev_stat *w)
2334{
2335 clear_pending (EV_A_ (W)w);
2336 if (expect_false (!ev_is_active (w)))
2337 return;
2338
2339#if EV_USE_INOTIFY
2340 infy_del (EV_A_ w);
2341#endif
2342 ev_timer_stop (EV_A_ &w->timer);
2343
2344 ev_stop (EV_A_ (W)w);
2345}
2346#endif
2347
2348#if EV_IDLE_ENABLE
2349void
2350ev_idle_start (EV_P_ ev_idle *w)
2351{
2352 if (expect_false (ev_is_active (w)))
2353 return;
2354
2355 pri_adjust (EV_A_ (W)w);
2356
2357 {
2358 int active = ++idlecnt [ABSPRI (w)];
2359
2360 ++idleall;
2361 ev_start (EV_A_ (W)w, active);
2362
2363 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2364 idles [ABSPRI (w)][active - 1] = w;
2365 }
2366}
2367
2368void
2369ev_idle_stop (EV_P_ ev_idle *w)
2370{
2371 clear_pending (EV_A_ (W)w);
2372 if (expect_false (!ev_is_active (w)))
2373 return;
2374
2375 {
2376 int active = ev_active (w);
2377
2378 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2379 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2380
2381 ev_stop (EV_A_ (W)w);
2382 --idleall;
2383 }
2384}
2385#endif
2386
2387void
2388ev_prepare_start (EV_P_ ev_prepare *w)
2389{
2390 if (expect_false (ev_is_active (w)))
2391 return;
2392
2393 ev_start (EV_A_ (W)w, ++preparecnt);
2394 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2395 prepares [preparecnt - 1] = w;
2396}
2397
2398void
2399ev_prepare_stop (EV_P_ ev_prepare *w)
2400{
2401 clear_pending (EV_A_ (W)w);
2402 if (expect_false (!ev_is_active (w)))
2403 return;
2404
2405 {
2406 int active = ev_active (w);
2407
2408 prepares [active - 1] = prepares [--preparecnt];
2409 ev_active (prepares [active - 1]) = active;
2410 }
2411
2412 ev_stop (EV_A_ (W)w);
2413}
2414
2415void
2416ev_check_start (EV_P_ ev_check *w)
2417{
2418 if (expect_false (ev_is_active (w)))
2419 return;
2420
2421 ev_start (EV_A_ (W)w, ++checkcnt);
2422 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2423 checks [checkcnt - 1] = w;
2424}
2425
2426void
2427ev_check_stop (EV_P_ ev_check *w)
2428{
2429 clear_pending (EV_A_ (W)w);
2430 if (expect_false (!ev_is_active (w)))
2431 return;
2432
2433 {
2434 int active = ev_active (w);
2435
2436 checks [active - 1] = checks [--checkcnt];
2437 ev_active (checks [active - 1]) = active;
2438 }
2439
2440 ev_stop (EV_A_ (W)w);
2441}
2442
2443#if EV_EMBED_ENABLE
2444void noinline
2445ev_embed_sweep (EV_P_ ev_embed *w)
2446{
2447 ev_loop (w->other, EVLOOP_NONBLOCK);
2448}
2449
2450static void
2451embed_io_cb (EV_P_ ev_io *io, int revents)
2452{
2453 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2454
2455 if (ev_cb (w))
2456 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2457 else
2458 ev_loop (w->other, EVLOOP_NONBLOCK);
2459}
2460
2461static void
2462embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2463{
2464 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2465
2466 {
2467 struct ev_loop *loop = w->other;
2468
2469 while (fdchangecnt)
2470 {
2471 fd_reify (EV_A);
2472 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2473 }
2474 }
2475}
2476
2477#if 0
2478static void
2479embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2480{
2481 ev_idle_stop (EV_A_ idle);
2482}
2483#endif
2484
2485void
2486ev_embed_start (EV_P_ ev_embed *w)
2487{
2488 if (expect_false (ev_is_active (w)))
2489 return;
2490
2491 {
2492 struct ev_loop *loop = w->other;
2493 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2494 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2495 }
2496
2497 ev_set_priority (&w->io, ev_priority (w));
2498 ev_io_start (EV_A_ &w->io);
2499
2500 ev_prepare_init (&w->prepare, embed_prepare_cb);
2501 ev_set_priority (&w->prepare, EV_MINPRI);
2502 ev_prepare_start (EV_A_ &w->prepare);
2503
2504 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2505
2506 ev_start (EV_A_ (W)w, 1);
2507}
2508
2509void
2510ev_embed_stop (EV_P_ ev_embed *w)
2511{
2512 clear_pending (EV_A_ (W)w);
2513 if (expect_false (!ev_is_active (w)))
2514 return;
2515
2516 ev_io_stop (EV_A_ &w->io);
2517 ev_prepare_stop (EV_A_ &w->prepare);
2518
2519 ev_stop (EV_A_ (W)w);
2520}
2521#endif
2522
2523#if EV_FORK_ENABLE
2524void
2525ev_fork_start (EV_P_ ev_fork *w)
2526{
2527 if (expect_false (ev_is_active (w)))
2528 return;
2529
2530 ev_start (EV_A_ (W)w, ++forkcnt);
2531 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2532 forks [forkcnt - 1] = w;
2533}
2534
2535void
2536ev_fork_stop (EV_P_ ev_fork *w)
2537{
2538 clear_pending (EV_A_ (W)w);
2539 if (expect_false (!ev_is_active (w)))
2540 return;
2541
2542 {
2543 int active = ev_active (w);
2544
2545 forks [active - 1] = forks [--forkcnt];
2546 ev_active (forks [active - 1]) = active;
2547 }
2548
2549 ev_stop (EV_A_ (W)w);
2550}
2551#endif
2552
2553#if EV_ASYNC_ENABLE
2554void
2555ev_async_start (EV_P_ ev_async *w)
2556{
2557 if (expect_false (ev_is_active (w)))
2558 return;
2559
2560 evpipe_init (EV_A);
2561
2562 ev_start (EV_A_ (W)w, ++asynccnt);
2563 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2564 asyncs [asynccnt - 1] = w;
2565}
2566
2567void
2568ev_async_stop (EV_P_ ev_async *w)
2569{
2570 clear_pending (EV_A_ (W)w);
2571 if (expect_false (!ev_is_active (w)))
2572 return;
2573
2574 {
2575 int active = ev_active (w);
2576
2577 asyncs [active - 1] = asyncs [--asynccnt];
2578 ev_active (asyncs [active - 1]) = active;
2579 }
2580
2581 ev_stop (EV_A_ (W)w);
2582}
2583
2584void
2585ev_async_send (EV_P_ ev_async *w)
2586{
2587 w->sent = 1;
2588 evpipe_write (EV_A_ &gotasync);
2589}
2590#endif
2591
1469/*****************************************************************************/ 2592/*****************************************************************************/
1470 2593
1471struct ev_once 2594struct ev_once
1472{ 2595{
1473 struct ev_io io; 2596 ev_io io;
1474 struct ev_timer to; 2597 ev_timer to;
1475 void (*cb)(int revents, void *arg); 2598 void (*cb)(int revents, void *arg);
1476 void *arg; 2599 void *arg;
1477}; 2600};
1478 2601
1479static void 2602static void
… …
1488 2611
1489 cb (revents, arg); 2612 cb (revents, arg);
1490} 2613}
1491 2614
1492static void 2615static void
1493once_cb_io (EV_P_ struct ev_io *w, int revents) 2616once_cb_io (EV_P_ ev_io *w, int revents)
1494{ 2617{
1495 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2618 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1496} 2619}
1497 2620
1498static void 2621static void
1499once_cb_to (EV_P_ struct ev_timer *w, int revents) 2622once_cb_to (EV_P_ ev_timer *w, int revents)
1500{ 2623{
1501 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2624 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1502} 2625}
1503 2626
1504void 2627void
1505ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2628ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1506{ 2629{
1507 struct ev_once *once = ev_malloc (sizeof (struct ev_once)); 2630 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1508 2631
1509 if (!once) 2632 if (expect_false (!once))
2633 {
1510 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2634 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1511 else 2635 return;
1512 { 2636 }
2637
1513 once->cb = cb; 2638 once->cb = cb;
1514 once->arg = arg; 2639 once->arg = arg;
1515 2640
1516 ev_watcher_init (&once->io, once_cb_io); 2641 ev_init (&once->io, once_cb_io);
1517 if (fd >= 0) 2642 if (fd >= 0)
1518 { 2643 {
1519 ev_io_set (&once->io, fd, events); 2644 ev_io_set (&once->io, fd, events);
1520 ev_io_start (EV_A_ &once->io); 2645 ev_io_start (EV_A_ &once->io);
1521 } 2646 }
1522 2647
1523 ev_watcher_init (&once->to, once_cb_to); 2648 ev_init (&once->to, once_cb_to);
1524 if (timeout >= 0.) 2649 if (timeout >= 0.)
1525 { 2650 {
1526 ev_timer_set (&once->to, timeout, 0.); 2651 ev_timer_set (&once->to, timeout, 0.);
1527 ev_timer_start (EV_A_ &once->to); 2652 ev_timer_start (EV_A_ &once->to);
1528 }
1529 } 2653 }
1530} 2654}
1531 2655
2656#if EV_MULTIPLICITY
2657 #include "ev_wrap.h"
2658#endif
2659
2660#ifdef __cplusplus
2661}
2662#endif
2663

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