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Comparing libev/ev.c (file contents):
Revision 1.98 by root, Sun Nov 11 02:05:20 2007 UTC vs.
Revision 1.257 by root, Sun Jun 29 22:32:51 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
38 51
39# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 53# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
42# endif 55# endif
43# ifndef EV_USE_REALTIME 56# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
45# endif 58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
46# endif 66# endif
47 67
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
50# endif 74# endif
51 75
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
53# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
54# endif 82# endif
55 83
56# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
57# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
58# endif 90# endif
59 91
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
62# endif 98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
63 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
64#endif 132#endif
65 133
66#include <math.h> 134#include <math.h>
67#include <stdlib.h> 135#include <stdlib.h>
68#include <fcntl.h> 136#include <fcntl.h>
… …
75#include <sys/types.h> 143#include <sys/types.h>
76#include <time.h> 144#include <time.h>
77 145
78#include <signal.h> 146#include <signal.h>
79 147
80#ifndef WIN32
81# include <unistd.h>
82# include <sys/time.h>
83# include <sys/wait.h>
84#endif
85/**/
86
87#ifndef EV_USE_MONOTONIC
88# define EV_USE_MONOTONIC 1
89#endif
90
91#ifndef EV_USE_SELECT
92# define EV_USE_SELECT 1
93#endif
94
95#ifndef EV_USE_POLL
96# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
97#endif
98
99#ifndef EV_USE_EPOLL
100# define EV_USE_EPOLL 0
101#endif
102
103#ifndef EV_USE_KQUEUE
104# define EV_USE_KQUEUE 0
105#endif
106
107#ifndef EV_USE_WIN32
108# ifdef WIN32
109# define EV_USE_WIN32 0 /* it does not exist, use select */
110# undef EV_USE_SELECT
111# define EV_USE_SELECT 1
112# else
113# define EV_USE_WIN32 0
114# endif
115#endif
116
117#ifndef EV_USE_REALTIME
118# define EV_USE_REALTIME 1
119#endif
120
121/**/
122
123#ifndef CLOCK_MONOTONIC
124# undef EV_USE_MONOTONIC
125# define EV_USE_MONOTONIC 0
126#endif
127
128#ifndef CLOCK_REALTIME
129# undef EV_USE_REALTIME
130# define EV_USE_REALTIME 0
131#endif
132
133/**/
134
135#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
136#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
137#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
138/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
139
140#ifdef EV_H 148#ifdef EV_H
141# include EV_H 149# include EV_H
142#else 150#else
143# include "ev.h" 151# include "ev.h"
144#endif 152#endif
145 153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# include <io.h>
160# define WIN32_LEAN_AND_MEAN
161# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1
164# endif
165#endif
166
167/* this block tries to deduce configuration from header-defined symbols and defaults */
168
169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
174# endif
175#endif
176
177#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
186# endif
187#endif
188
189#ifndef EV_USE_SELECT
190# define EV_USE_SELECT 1
191#endif
192
193#ifndef EV_USE_POLL
194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
198# endif
199#endif
200
201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
205# define EV_USE_EPOLL 0
206# endif
207#endif
208
209#ifndef EV_USE_KQUEUE
210# define EV_USE_KQUEUE 0
211#endif
212
213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
217#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
222# endif
223#endif
224
225#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif
232
233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268
269#ifndef CLOCK_MONOTONIC
270# undef EV_USE_MONOTONIC
271# define EV_USE_MONOTONIC 0
272#endif
273
274#ifndef CLOCK_REALTIME
275# undef EV_USE_REALTIME
276# define EV_USE_REALTIME 0
277#endif
278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/inotify.h>
292#endif
293
294#if EV_SELECT_IS_WINSOCKET
295# include <winsock.h>
296#endif
297
298#if EV_USE_EVENTFD
299/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
300# include <stdint.h>
301# ifdef __cplusplus
302extern "C" {
303# endif
304int eventfd (unsigned int initval, int flags);
305# ifdef __cplusplus
306}
307# endif
308#endif
309
310/**/
311
312#if EV_VERIFY >= 3
313# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
314#else
315# define EV_FREQUENT_CHECK do { } while (0)
316#endif
317
318/*
319 * This is used to avoid floating point rounding problems.
320 * It is added to ev_rt_now when scheduling periodics
321 * to ensure progress, time-wise, even when rounding
322 * errors are against us.
323 * This value is good at least till the year 4000.
324 * Better solutions welcome.
325 */
326#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
327
328#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
329#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
330/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
331
146#if __GNUC__ >= 3 332#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 333# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 334# define noinline __attribute__ ((noinline))
149#else 335#else
150# define expect(expr,value) (expr) 336# define expect(expr,value) (expr)
151# define inline static 337# define noinline
338# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
339# define inline
340# endif
152#endif 341#endif
153 342
154#define expect_false(expr) expect ((expr) != 0, 0) 343#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 344#define expect_true(expr) expect ((expr) != 0, 1)
345#define inline_size static inline
346
347#if EV_MINIMAL
348# define inline_speed static noinline
349#else
350# define inline_speed static inline
351#endif
156 352
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 353#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 354#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
159 355
356#define EMPTY /* required for microsofts broken pseudo-c compiler */
357#define EMPTY2(a,b) /* used to suppress some warnings */
358
160typedef struct ev_watcher *W; 359typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 360typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 361typedef ev_watcher_time *WT;
163 362
363#define ev_active(w) ((W)(w))->active
364#define ev_at(w) ((WT)(w))->at
365
366#if EV_USE_MONOTONIC
367/* sig_atomic_t is used to avoid per-thread variables or locking but still */
368/* giving it a reasonably high chance of working on typical architetcures */
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 369static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
370#endif
165 371
166#ifdef WIN32 372#ifdef _WIN32
167# include "ev_win32.c" 373# include "ev_win32.c"
168#endif 374#endif
169 375
170/*****************************************************************************/ 376/*****************************************************************************/
171 377
172static void (*syserr_cb)(const char *msg); 378static void (*syserr_cb)(const char *msg);
173 379
380void
174void ev_set_syserr_cb (void (*cb)(const char *msg)) 381ev_set_syserr_cb (void (*cb)(const char *msg))
175{ 382{
176 syserr_cb = cb; 383 syserr_cb = cb;
177} 384}
178 385
179static void 386static void noinline
180syserr (const char *msg) 387syserr (const char *msg)
181{ 388{
182 if (!msg) 389 if (!msg)
183 msg = "(libev) system error"; 390 msg = "(libev) system error";
184 391
… …
189 perror (msg); 396 perror (msg);
190 abort (); 397 abort ();
191 } 398 }
192} 399}
193 400
401static void *
402ev_realloc_emul (void *ptr, long size)
403{
404 /* some systems, notably openbsd and darwin, fail to properly
405 * implement realloc (x, 0) (as required by both ansi c-98 and
406 * the single unix specification, so work around them here.
407 */
408
409 if (size)
410 return realloc (ptr, size);
411
412 free (ptr);
413 return 0;
414}
415
194static void *(*alloc)(void *ptr, long size); 416static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195 417
418void
196void ev_set_allocator (void *(*cb)(void *ptr, long size)) 419ev_set_allocator (void *(*cb)(void *ptr, long size))
197{ 420{
198 alloc = cb; 421 alloc = cb;
199} 422}
200 423
201static void * 424inline_speed void *
202ev_realloc (void *ptr, long size) 425ev_realloc (void *ptr, long size)
203{ 426{
204 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 427 ptr = alloc (ptr, size);
205 428
206 if (!ptr && size) 429 if (!ptr && size)
207 { 430 {
208 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 431 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
209 abort (); 432 abort ();
… …
220typedef struct 443typedef struct
221{ 444{
222 WL head; 445 WL head;
223 unsigned char events; 446 unsigned char events;
224 unsigned char reify; 447 unsigned char reify;
448#if EV_SELECT_IS_WINSOCKET
449 SOCKET handle;
450#endif
225} ANFD; 451} ANFD;
226 452
227typedef struct 453typedef struct
228{ 454{
229 W w; 455 W w;
230 int events; 456 int events;
231} ANPENDING; 457} ANPENDING;
232 458
459#if EV_USE_INOTIFY
460/* hash table entry per inotify-id */
461typedef struct
462{
463 WL head;
464} ANFS;
465#endif
466
467/* Heap Entry */
468#if EV_HEAP_CACHE_AT
469 typedef struct {
470 ev_tstamp at;
471 WT w;
472 } ANHE;
473
474 #define ANHE_w(he) (he).w /* access watcher, read-write */
475 #define ANHE_at(he) (he).at /* access cached at, read-only */
476 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477#else
478 typedef WT ANHE;
479
480 #define ANHE_w(he) (he)
481 #define ANHE_at(he) (he)->at
482 #define ANHE_at_cache(he)
483#endif
484
233#if EV_MULTIPLICITY 485#if EV_MULTIPLICITY
234 486
235 struct ev_loop 487 struct ev_loop
236 { 488 {
237 ev_tstamp ev_rt_now; 489 ev_tstamp ev_rt_now;
490 #define ev_rt_now ((loop)->ev_rt_now)
238 #define VAR(name,decl) decl; 491 #define VAR(name,decl) decl;
239 #include "ev_vars.h" 492 #include "ev_vars.h"
240 #undef VAR 493 #undef VAR
241 }; 494 };
242 #include "ev_wrap.h" 495 #include "ev_wrap.h"
243 496
244 struct ev_loop default_loop_struct; 497 static struct ev_loop default_loop_struct;
245 static struct ev_loop *default_loop; 498 struct ev_loop *ev_default_loop_ptr;
246 499
247#else 500#else
248 501
249 ev_tstamp ev_rt_now; 502 ev_tstamp ev_rt_now;
250 #define VAR(name,decl) static decl; 503 #define VAR(name,decl) static decl;
251 #include "ev_vars.h" 504 #include "ev_vars.h"
252 #undef VAR 505 #undef VAR
253 506
254 static int default_loop; 507 static int ev_default_loop_ptr;
255 508
256#endif 509#endif
257 510
258/*****************************************************************************/ 511/*****************************************************************************/
259 512
… …
269 gettimeofday (&tv, 0); 522 gettimeofday (&tv, 0);
270 return tv.tv_sec + tv.tv_usec * 1e-6; 523 return tv.tv_sec + tv.tv_usec * 1e-6;
271#endif 524#endif
272} 525}
273 526
274inline ev_tstamp 527ev_tstamp inline_size
275get_clock (void) 528get_clock (void)
276{ 529{
277#if EV_USE_MONOTONIC 530#if EV_USE_MONOTONIC
278 if (expect_true (have_monotonic)) 531 if (expect_true (have_monotonic))
279 { 532 {
… …
292{ 545{
293 return ev_rt_now; 546 return ev_rt_now;
294} 547}
295#endif 548#endif
296 549
297#define array_roundsize(type,n) ((n) | 4 & ~3) 550void
551ev_sleep (ev_tstamp delay)
552{
553 if (delay > 0.)
554 {
555#if EV_USE_NANOSLEEP
556 struct timespec ts;
557
558 ts.tv_sec = (time_t)delay;
559 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
560
561 nanosleep (&ts, 0);
562#elif defined(_WIN32)
563 Sleep ((unsigned long)(delay * 1e3));
564#else
565 struct timeval tv;
566
567 tv.tv_sec = (time_t)delay;
568 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
569
570 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
571 /* somehting nto guaranteed by newer posix versions, but guaranteed */
572 /* by older ones */
573 select (0, 0, 0, 0, &tv);
574#endif
575 }
576}
577
578/*****************************************************************************/
579
580#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
581
582int inline_size
583array_nextsize (int elem, int cur, int cnt)
584{
585 int ncur = cur + 1;
586
587 do
588 ncur <<= 1;
589 while (cnt > ncur);
590
591 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
592 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
593 {
594 ncur *= elem;
595 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
596 ncur = ncur - sizeof (void *) * 4;
597 ncur /= elem;
598 }
599
600 return ncur;
601}
602
603static noinline void *
604array_realloc (int elem, void *base, int *cur, int cnt)
605{
606 *cur = array_nextsize (elem, *cur, cnt);
607 return ev_realloc (base, elem * *cur);
608}
298 609
299#define array_needsize(type,base,cur,cnt,init) \ 610#define array_needsize(type,base,cur,cnt,init) \
300 if (expect_false ((cnt) > cur)) \ 611 if (expect_false ((cnt) > (cur))) \
301 { \ 612 { \
302 int newcnt = cur; \ 613 int ocur_ = (cur); \
303 do \ 614 (base) = (type *)array_realloc \
304 { \ 615 (sizeof (type), (base), &(cur), (cnt)); \
305 newcnt = array_roundsize (type, newcnt << 1); \ 616 init ((base) + (ocur_), (cur) - ocur_); \
306 } \
307 while ((cnt) > newcnt); \
308 \
309 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
310 init (base + cur, newcnt - cur); \
311 cur = newcnt; \
312 } 617 }
313 618
619#if 0
314#define array_slim(type,stem) \ 620#define array_slim(type,stem) \
315 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 621 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
316 { \ 622 { \
317 stem ## max = array_roundsize (stem ## cnt >> 1); \ 623 stem ## max = array_roundsize (stem ## cnt >> 1); \
318 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 624 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
319 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 625 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
320 } 626 }
321 627#endif
322/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
323/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
324#define array_free_microshit(stem) \
325 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
326 628
327#define array_free(stem, idx) \ 629#define array_free(stem, idx) \
328 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 630 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
329 631
330/*****************************************************************************/ 632/*****************************************************************************/
331 633
332static void 634void noinline
635ev_feed_event (EV_P_ void *w, int revents)
636{
637 W w_ = (W)w;
638 int pri = ABSPRI (w_);
639
640 if (expect_false (w_->pending))
641 pendings [pri][w_->pending - 1].events |= revents;
642 else
643 {
644 w_->pending = ++pendingcnt [pri];
645 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
646 pendings [pri][w_->pending - 1].w = w_;
647 pendings [pri][w_->pending - 1].events = revents;
648 }
649}
650
651void inline_speed
652queue_events (EV_P_ W *events, int eventcnt, int type)
653{
654 int i;
655
656 for (i = 0; i < eventcnt; ++i)
657 ev_feed_event (EV_A_ events [i], type);
658}
659
660/*****************************************************************************/
661
662void inline_size
333anfds_init (ANFD *base, int count) 663anfds_init (ANFD *base, int count)
334{ 664{
335 while (count--) 665 while (count--)
336 { 666 {
337 base->head = 0; 667 base->head = 0;
… …
340 670
341 ++base; 671 ++base;
342 } 672 }
343} 673}
344 674
345void 675void inline_speed
346ev_feed_event (EV_P_ void *w, int revents)
347{
348 W w_ = (W)w;
349
350 if (w_->pending)
351 {
352 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
353 return;
354 }
355
356 w_->pending = ++pendingcnt [ABSPRI (w_)];
357 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
358 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
359 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
360}
361
362static void
363queue_events (EV_P_ W *events, int eventcnt, int type)
364{
365 int i;
366
367 for (i = 0; i < eventcnt; ++i)
368 ev_feed_event (EV_A_ events [i], type);
369}
370
371inline void
372fd_event (EV_P_ int fd, int revents) 676fd_event (EV_P_ int fd, int revents)
373{ 677{
374 ANFD *anfd = anfds + fd; 678 ANFD *anfd = anfds + fd;
375 struct ev_io *w; 679 ev_io *w;
376 680
377 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 681 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
378 { 682 {
379 int ev = w->events & revents; 683 int ev = w->events & revents;
380 684
381 if (ev) 685 if (ev)
382 ev_feed_event (EV_A_ (W)w, ev); 686 ev_feed_event (EV_A_ (W)w, ev);
… …
384} 688}
385 689
386void 690void
387ev_feed_fd_event (EV_P_ int fd, int revents) 691ev_feed_fd_event (EV_P_ int fd, int revents)
388{ 692{
693 if (fd >= 0 && fd < anfdmax)
389 fd_event (EV_A_ fd, revents); 694 fd_event (EV_A_ fd, revents);
390} 695}
391 696
392/*****************************************************************************/ 697void inline_size
393
394static void
395fd_reify (EV_P) 698fd_reify (EV_P)
396{ 699{
397 int i; 700 int i;
398 701
399 for (i = 0; i < fdchangecnt; ++i) 702 for (i = 0; i < fdchangecnt; ++i)
400 { 703 {
401 int fd = fdchanges [i]; 704 int fd = fdchanges [i];
402 ANFD *anfd = anfds + fd; 705 ANFD *anfd = anfds + fd;
403 struct ev_io *w; 706 ev_io *w;
404 707
405 int events = 0; 708 unsigned char events = 0;
406 709
407 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 710 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
408 events |= w->events; 711 events |= (unsigned char)w->events;
409 712
713#if EV_SELECT_IS_WINSOCKET
714 if (events)
715 {
716 unsigned long arg;
717 #ifdef EV_FD_TO_WIN32_HANDLE
718 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
719 #else
720 anfd->handle = _get_osfhandle (fd);
721 #endif
722 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
723 }
724#endif
725
726 {
727 unsigned char o_events = anfd->events;
728 unsigned char o_reify = anfd->reify;
729
410 anfd->reify = 0; 730 anfd->reify = 0;
411
412 method_modify (EV_A_ fd, anfd->events, events);
413 anfd->events = events; 731 anfd->events = events;
732
733 if (o_events != events || o_reify & EV_IOFDSET)
734 backend_modify (EV_A_ fd, o_events, events);
735 }
414 } 736 }
415 737
416 fdchangecnt = 0; 738 fdchangecnt = 0;
417} 739}
418 740
419static void 741void inline_size
420fd_change (EV_P_ int fd) 742fd_change (EV_P_ int fd, int flags)
421{ 743{
422 if (anfds [fd].reify) 744 unsigned char reify = anfds [fd].reify;
423 return;
424
425 anfds [fd].reify = 1; 745 anfds [fd].reify |= flags;
426 746
747 if (expect_true (!reify))
748 {
427 ++fdchangecnt; 749 ++fdchangecnt;
428 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 750 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
429 fdchanges [fdchangecnt - 1] = fd; 751 fdchanges [fdchangecnt - 1] = fd;
752 }
430} 753}
431 754
432static void 755void inline_speed
433fd_kill (EV_P_ int fd) 756fd_kill (EV_P_ int fd)
434{ 757{
435 struct ev_io *w; 758 ev_io *w;
436 759
437 while ((w = (struct ev_io *)anfds [fd].head)) 760 while ((w = (ev_io *)anfds [fd].head))
438 { 761 {
439 ev_io_stop (EV_A_ w); 762 ev_io_stop (EV_A_ w);
440 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 763 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
441 } 764 }
442} 765}
443 766
444static int 767int inline_size
445fd_valid (int fd) 768fd_valid (int fd)
446{ 769{
447#ifdef WIN32 770#ifdef _WIN32
448 return !!win32_get_osfhandle (fd); 771 return _get_osfhandle (fd) != -1;
449#else 772#else
450 return fcntl (fd, F_GETFD) != -1; 773 return fcntl (fd, F_GETFD) != -1;
451#endif 774#endif
452} 775}
453 776
454/* called on EBADF to verify fds */ 777/* called on EBADF to verify fds */
455static void 778static void noinline
456fd_ebadf (EV_P) 779fd_ebadf (EV_P)
457{ 780{
458 int fd; 781 int fd;
459 782
460 for (fd = 0; fd < anfdmax; ++fd) 783 for (fd = 0; fd < anfdmax; ++fd)
461 if (anfds [fd].events) 784 if (anfds [fd].events)
462 if (!fd_valid (fd) == -1 && errno == EBADF) 785 if (!fd_valid (fd) && errno == EBADF)
463 fd_kill (EV_A_ fd); 786 fd_kill (EV_A_ fd);
464} 787}
465 788
466/* called on ENOMEM in select/poll to kill some fds and retry */ 789/* called on ENOMEM in select/poll to kill some fds and retry */
467static void 790static void noinline
468fd_enomem (EV_P) 791fd_enomem (EV_P)
469{ 792{
470 int fd; 793 int fd;
471 794
472 for (fd = anfdmax; fd--; ) 795 for (fd = anfdmax; fd--; )
… …
475 fd_kill (EV_A_ fd); 798 fd_kill (EV_A_ fd);
476 return; 799 return;
477 } 800 }
478} 801}
479 802
480/* usually called after fork if method needs to re-arm all fds from scratch */ 803/* usually called after fork if backend needs to re-arm all fds from scratch */
481static void 804static void noinline
482fd_rearm_all (EV_P) 805fd_rearm_all (EV_P)
483{ 806{
484 int fd; 807 int fd;
485 808
486 /* this should be highly optimised to not do anything but set a flag */
487 for (fd = 0; fd < anfdmax; ++fd) 809 for (fd = 0; fd < anfdmax; ++fd)
488 if (anfds [fd].events) 810 if (anfds [fd].events)
489 { 811 {
490 anfds [fd].events = 0; 812 anfds [fd].events = 0;
491 fd_change (EV_A_ fd); 813 fd_change (EV_A_ fd, EV_IOFDSET | 1);
492 } 814 }
493} 815}
494 816
495/*****************************************************************************/ 817/*****************************************************************************/
496 818
497static void 819/*
498upheap (WT *heap, int k) 820 * the heap functions want a real array index. array index 0 uis guaranteed to not
499{ 821 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
500 WT w = heap [k]; 822 * the branching factor of the d-tree.
823 */
501 824
502 while (k && heap [k >> 1]->at > w->at) 825/*
503 { 826 * at the moment we allow libev the luxury of two heaps,
504 heap [k] = heap [k >> 1]; 827 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
505 ((W)heap [k])->active = k + 1; 828 * which is more cache-efficient.
506 k >>= 1; 829 * the difference is about 5% with 50000+ watchers.
507 } 830 */
831#if EV_USE_4HEAP
508 832
509 heap [k] = w; 833#define DHEAP 4
510 ((W)heap [k])->active = k + 1; 834#define HEAP0 (DHEAP - 1) /* index of first element in heap */
835#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
836#define UPHEAP_DONE(p,k) ((p) == (k))
511 837
512} 838/* away from the root */
513 839void inline_speed
514static void
515downheap (WT *heap, int N, int k) 840downheap (ANHE *heap, int N, int k)
516{ 841{
517 WT w = heap [k]; 842 ANHE he = heap [k];
843 ANHE *E = heap + N + HEAP0;
518 844
519 while (k < (N >> 1)) 845 for (;;)
520 { 846 {
521 int j = k << 1; 847 ev_tstamp minat;
848 ANHE *minpos;
849 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
522 850
523 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 851 /* find minimum child */
852 if (expect_true (pos + DHEAP - 1 < E))
524 ++j; 853 {
525 854 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
526 if (w->at <= heap [j]->at) 855 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
856 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
857 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
858 }
859 else if (pos < E)
860 {
861 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
862 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
863 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
864 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
865 }
866 else
527 break; 867 break;
528 868
869 if (ANHE_at (he) <= minat)
870 break;
871
872 heap [k] = *minpos;
873 ev_active (ANHE_w (*minpos)) = k;
874
875 k = minpos - heap;
876 }
877
878 heap [k] = he;
879 ev_active (ANHE_w (he)) = k;
880}
881
882#else /* 4HEAP */
883
884#define HEAP0 1
885#define HPARENT(k) ((k) >> 1)
886#define UPHEAP_DONE(p,k) (!(p))
887
888/* away from the root */
889void inline_speed
890downheap (ANHE *heap, int N, int k)
891{
892 ANHE he = heap [k];
893
894 for (;;)
895 {
896 int c = k << 1;
897
898 if (c > N + HEAP0 - 1)
899 break;
900
901 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
902 ? 1 : 0;
903
904 if (ANHE_at (he) <= ANHE_at (heap [c]))
905 break;
906
529 heap [k] = heap [j]; 907 heap [k] = heap [c];
530 ((W)heap [k])->active = k + 1; 908 ev_active (ANHE_w (heap [k])) = k;
909
531 k = j; 910 k = c;
532 } 911 }
533 912
534 heap [k] = w; 913 heap [k] = he;
535 ((W)heap [k])->active = k + 1; 914 ev_active (ANHE_w (he)) = k;
536} 915}
916#endif
537 917
538inline void 918/* towards the root */
539adjustheap (WT *heap, int N, int k, ev_tstamp at) 919void inline_speed
920upheap (ANHE *heap, int k)
540{ 921{
541 ev_tstamp old_at = heap [k]->at; 922 ANHE he = heap [k];
923
924 for (;;)
925 {
926 int p = HPARENT (k);
927
928 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
929 break;
930
931 heap [k] = heap [p];
932 ev_active (ANHE_w (heap [k])) = k;
933 k = p;
934 }
935
542 heap [k]->at = at; 936 heap [k] = he;
937 ev_active (ANHE_w (he)) = k;
938}
543 939
544 if (old_at < at) 940void inline_size
941adjustheap (ANHE *heap, int N, int k)
942{
943 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
944 upheap (heap, k);
945 else
545 downheap (heap, N, k); 946 downheap (heap, N, k);
546 else 947}
948
949/* rebuild the heap: this function is used only once and executed rarely */
950void inline_size
951reheap (ANHE *heap, int N)
952{
953 int i;
954
955 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
956 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
957 for (i = 0; i < N; ++i)
547 upheap (heap, k); 958 upheap (heap, i + HEAP0);
548} 959}
549 960
550/*****************************************************************************/ 961/*****************************************************************************/
551 962
552typedef struct 963typedef struct
553{ 964{
554 WL head; 965 WL head;
555 sig_atomic_t volatile gotsig; 966 EV_ATOMIC_T gotsig;
556} ANSIG; 967} ANSIG;
557 968
558static ANSIG *signals; 969static ANSIG *signals;
559static int signalmax; 970static int signalmax;
560 971
561static int sigpipe [2]; 972static EV_ATOMIC_T gotsig;
562static sig_atomic_t volatile gotsig;
563static struct ev_io sigev;
564 973
565static void 974void inline_size
566signals_init (ANSIG *base, int count) 975signals_init (ANSIG *base, int count)
567{ 976{
568 while (count--) 977 while (count--)
569 { 978 {
570 base->head = 0; 979 base->head = 0;
… …
572 981
573 ++base; 982 ++base;
574 } 983 }
575} 984}
576 985
986/*****************************************************************************/
987
988void inline_speed
989fd_intern (int fd)
990{
991#ifdef _WIN32
992 unsigned long arg = 1;
993 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
994#else
995 fcntl (fd, F_SETFD, FD_CLOEXEC);
996 fcntl (fd, F_SETFL, O_NONBLOCK);
997#endif
998}
999
1000static void noinline
1001evpipe_init (EV_P)
1002{
1003 if (!ev_is_active (&pipeev))
1004 {
1005#if EV_USE_EVENTFD
1006 if ((evfd = eventfd (0, 0)) >= 0)
1007 {
1008 evpipe [0] = -1;
1009 fd_intern (evfd);
1010 ev_io_set (&pipeev, evfd, EV_READ);
1011 }
1012 else
1013#endif
1014 {
1015 while (pipe (evpipe))
1016 syserr ("(libev) error creating signal/async pipe");
1017
1018 fd_intern (evpipe [0]);
1019 fd_intern (evpipe [1]);
1020 ev_io_set (&pipeev, evpipe [0], EV_READ);
1021 }
1022
1023 ev_io_start (EV_A_ &pipeev);
1024 ev_unref (EV_A); /* watcher should not keep loop alive */
1025 }
1026}
1027
1028void inline_size
1029evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1030{
1031 if (!*flag)
1032 {
1033 int old_errno = errno; /* save errno because write might clobber it */
1034
1035 *flag = 1;
1036
1037#if EV_USE_EVENTFD
1038 if (evfd >= 0)
1039 {
1040 uint64_t counter = 1;
1041 write (evfd, &counter, sizeof (uint64_t));
1042 }
1043 else
1044#endif
1045 write (evpipe [1], &old_errno, 1);
1046
1047 errno = old_errno;
1048 }
1049}
1050
577static void 1051static void
1052pipecb (EV_P_ ev_io *iow, int revents)
1053{
1054#if EV_USE_EVENTFD
1055 if (evfd >= 0)
1056 {
1057 uint64_t counter;
1058 read (evfd, &counter, sizeof (uint64_t));
1059 }
1060 else
1061#endif
1062 {
1063 char dummy;
1064 read (evpipe [0], &dummy, 1);
1065 }
1066
1067 if (gotsig && ev_is_default_loop (EV_A))
1068 {
1069 int signum;
1070 gotsig = 0;
1071
1072 for (signum = signalmax; signum--; )
1073 if (signals [signum].gotsig)
1074 ev_feed_signal_event (EV_A_ signum + 1);
1075 }
1076
1077#if EV_ASYNC_ENABLE
1078 if (gotasync)
1079 {
1080 int i;
1081 gotasync = 0;
1082
1083 for (i = asynccnt; i--; )
1084 if (asyncs [i]->sent)
1085 {
1086 asyncs [i]->sent = 0;
1087 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1088 }
1089 }
1090#endif
1091}
1092
1093/*****************************************************************************/
1094
1095static void
578sighandler (int signum) 1096ev_sighandler (int signum)
579{ 1097{
1098#if EV_MULTIPLICITY
1099 struct ev_loop *loop = &default_loop_struct;
1100#endif
1101
580#if WIN32 1102#if _WIN32
581 signal (signum, sighandler); 1103 signal (signum, ev_sighandler);
582#endif 1104#endif
583 1105
584 signals [signum - 1].gotsig = 1; 1106 signals [signum - 1].gotsig = 1;
585 1107 evpipe_write (EV_A_ &gotsig);
586 if (!gotsig)
587 {
588 int old_errno = errno;
589 gotsig = 1;
590#ifdef WIN32
591 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
592#else
593 write (sigpipe [1], &signum, 1);
594#endif
595 errno = old_errno;
596 }
597} 1108}
598 1109
599void 1110void noinline
600ev_feed_signal_event (EV_P_ int signum) 1111ev_feed_signal_event (EV_P_ int signum)
601{ 1112{
602 WL w; 1113 WL w;
603 1114
604#if EV_MULTIPLICITY 1115#if EV_MULTIPLICITY
605 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1116 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
606#endif 1117#endif
607 1118
608 --signum; 1119 --signum;
609 1120
610 if (signum < 0 || signum >= signalmax) 1121 if (signum < 0 || signum >= signalmax)
… …
614 1125
615 for (w = signals [signum].head; w; w = w->next) 1126 for (w = signals [signum].head; w; w = w->next)
616 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1127 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
617} 1128}
618 1129
619static void
620sigcb (EV_P_ struct ev_io *iow, int revents)
621{
622 int signum;
623
624#ifdef WIN32
625 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
626#else
627 read (sigpipe [0], &revents, 1);
628#endif
629 gotsig = 0;
630
631 for (signum = signalmax; signum--; )
632 if (signals [signum].gotsig)
633 ev_feed_signal_event (EV_A_ signum + 1);
634}
635
636static void
637siginit (EV_P)
638{
639#ifndef WIN32
640 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
641 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
642
643 /* rather than sort out wether we really need nb, set it */
644 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
645 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
646#endif
647
648 ev_io_set (&sigev, sigpipe [0], EV_READ);
649 ev_io_start (EV_A_ &sigev);
650 ev_unref (EV_A); /* child watcher should not keep loop alive */
651}
652
653/*****************************************************************************/ 1130/*****************************************************************************/
654 1131
655static struct ev_child *childs [PID_HASHSIZE]; 1132static WL childs [EV_PID_HASHSIZE];
656 1133
657#ifndef WIN32 1134#ifndef _WIN32
658 1135
659static struct ev_signal childev; 1136static ev_signal childev;
1137
1138#ifndef WIFCONTINUED
1139# define WIFCONTINUED(status) 0
1140#endif
1141
1142void inline_speed
1143child_reap (EV_P_ int chain, int pid, int status)
1144{
1145 ev_child *w;
1146 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1147
1148 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1149 {
1150 if ((w->pid == pid || !w->pid)
1151 && (!traced || (w->flags & 1)))
1152 {
1153 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1154 w->rpid = pid;
1155 w->rstatus = status;
1156 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1157 }
1158 }
1159}
660 1160
661#ifndef WCONTINUED 1161#ifndef WCONTINUED
662# define WCONTINUED 0 1162# define WCONTINUED 0
663#endif 1163#endif
664 1164
665static void 1165static void
666child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
667{
668 struct ev_child *w;
669
670 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
671 if (w->pid == pid || !w->pid)
672 {
673 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
674 w->rpid = pid;
675 w->rstatus = status;
676 ev_feed_event (EV_A_ (W)w, EV_CHILD);
677 }
678}
679
680static void
681childcb (EV_P_ struct ev_signal *sw, int revents) 1166childcb (EV_P_ ev_signal *sw, int revents)
682{ 1167{
683 int pid, status; 1168 int pid, status;
684 1169
1170 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
685 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1171 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
686 { 1172 if (!WCONTINUED
1173 || errno != EINVAL
1174 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1175 return;
1176
687 /* make sure we are called again until all childs have been reaped */ 1177 /* make sure we are called again until all children have been reaped */
1178 /* we need to do it this way so that the callback gets called before we continue */
688 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1179 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
689 1180
690 child_reap (EV_A_ sw, pid, pid, status); 1181 child_reap (EV_A_ pid, pid, status);
1182 if (EV_PID_HASHSIZE > 1)
691 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1183 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
692 }
693} 1184}
694 1185
695#endif 1186#endif
696 1187
697/*****************************************************************************/ 1188/*****************************************************************************/
698 1189
1190#if EV_USE_PORT
1191# include "ev_port.c"
1192#endif
699#if EV_USE_KQUEUE 1193#if EV_USE_KQUEUE
700# include "ev_kqueue.c" 1194# include "ev_kqueue.c"
701#endif 1195#endif
702#if EV_USE_EPOLL 1196#if EV_USE_EPOLL
703# include "ev_epoll.c" 1197# include "ev_epoll.c"
… …
720{ 1214{
721 return EV_VERSION_MINOR; 1215 return EV_VERSION_MINOR;
722} 1216}
723 1217
724/* return true if we are running with elevated privileges and should ignore env variables */ 1218/* return true if we are running with elevated privileges and should ignore env variables */
725static int 1219int inline_size
726enable_secure (void) 1220enable_secure (void)
727{ 1221{
728#ifdef WIN32 1222#ifdef _WIN32
729 return 0; 1223 return 0;
730#else 1224#else
731 return getuid () != geteuid () 1225 return getuid () != geteuid ()
732 || getgid () != getegid (); 1226 || getgid () != getegid ();
733#endif 1227#endif
734} 1228}
735 1229
736int 1230unsigned int
737ev_method (EV_P) 1231ev_supported_backends (void)
738{ 1232{
739 return method; 1233 unsigned int flags = 0;
740}
741 1234
742static void 1235 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
743loop_init (EV_P_ int methods) 1236 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1237 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1238 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1239 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1240
1241 return flags;
1242}
1243
1244unsigned int
1245ev_recommended_backends (void)
744{ 1246{
745 if (!method) 1247 unsigned int flags = ev_supported_backends ();
1248
1249#ifndef __NetBSD__
1250 /* kqueue is borked on everything but netbsd apparently */
1251 /* it usually doesn't work correctly on anything but sockets and pipes */
1252 flags &= ~EVBACKEND_KQUEUE;
1253#endif
1254#ifdef __APPLE__
1255 // flags &= ~EVBACKEND_KQUEUE; for documentation
1256 flags &= ~EVBACKEND_POLL;
1257#endif
1258
1259 return flags;
1260}
1261
1262unsigned int
1263ev_embeddable_backends (void)
1264{
1265 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1266
1267 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1268 /* please fix it and tell me how to detect the fix */
1269 flags &= ~EVBACKEND_EPOLL;
1270
1271 return flags;
1272}
1273
1274unsigned int
1275ev_backend (EV_P)
1276{
1277 return backend;
1278}
1279
1280unsigned int
1281ev_loop_count (EV_P)
1282{
1283 return loop_count;
1284}
1285
1286void
1287ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1288{
1289 io_blocktime = interval;
1290}
1291
1292void
1293ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1294{
1295 timeout_blocktime = interval;
1296}
1297
1298static void noinline
1299loop_init (EV_P_ unsigned int flags)
1300{
1301 if (!backend)
746 { 1302 {
747#if EV_USE_MONOTONIC 1303#if EV_USE_MONOTONIC
748 { 1304 {
749 struct timespec ts; 1305 struct timespec ts;
750 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1306 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
751 have_monotonic = 1; 1307 have_monotonic = 1;
752 } 1308 }
753#endif 1309#endif
754 1310
755 ev_rt_now = ev_time (); 1311 ev_rt_now = ev_time ();
756 mn_now = get_clock (); 1312 mn_now = get_clock ();
757 now_floor = mn_now; 1313 now_floor = mn_now;
758 rtmn_diff = ev_rt_now - mn_now; 1314 rtmn_diff = ev_rt_now - mn_now;
759 1315
760 if (methods == EVMETHOD_AUTO) 1316 io_blocktime = 0.;
761 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1317 timeout_blocktime = 0.;
1318 backend = 0;
1319 backend_fd = -1;
1320 gotasync = 0;
1321#if EV_USE_INOTIFY
1322 fs_fd = -2;
1323#endif
1324
1325 /* pid check not overridable via env */
1326#ifndef _WIN32
1327 if (flags & EVFLAG_FORKCHECK)
1328 curpid = getpid ();
1329#endif
1330
1331 if (!(flags & EVFLAG_NOENV)
1332 && !enable_secure ()
1333 && getenv ("LIBEV_FLAGS"))
762 methods = atoi (getenv ("LIBEV_METHODS")); 1334 flags = atoi (getenv ("LIBEV_FLAGS"));
763 else
764 methods = EVMETHOD_ANY;
765 1335
766 method = 0; 1336 if (!(flags & 0x0000ffffU))
767#if EV_USE_WIN32 1337 flags |= ev_recommended_backends ();
768 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1338
1339#if EV_USE_PORT
1340 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
769#endif 1341#endif
770#if EV_USE_KQUEUE 1342#if EV_USE_KQUEUE
771 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1343 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
772#endif 1344#endif
773#if EV_USE_EPOLL 1345#if EV_USE_EPOLL
774 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1346 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
775#endif 1347#endif
776#if EV_USE_POLL 1348#if EV_USE_POLL
777 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1349 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
778#endif 1350#endif
779#if EV_USE_SELECT 1351#if EV_USE_SELECT
780 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1352 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
781#endif 1353#endif
782 1354
783 ev_init (&sigev, sigcb); 1355 ev_init (&pipeev, pipecb);
784 ev_set_priority (&sigev, EV_MAXPRI); 1356 ev_set_priority (&pipeev, EV_MAXPRI);
785 } 1357 }
786} 1358}
787 1359
788void 1360static void noinline
789loop_destroy (EV_P) 1361loop_destroy (EV_P)
790{ 1362{
791 int i; 1363 int i;
792 1364
1365 if (ev_is_active (&pipeev))
1366 {
1367 ev_ref (EV_A); /* signal watcher */
1368 ev_io_stop (EV_A_ &pipeev);
1369
1370#if EV_USE_EVENTFD
1371 if (evfd >= 0)
1372 close (evfd);
1373#endif
1374
1375 if (evpipe [0] >= 0)
1376 {
1377 close (evpipe [0]);
1378 close (evpipe [1]);
1379 }
1380 }
1381
793#if EV_USE_WIN32 1382#if EV_USE_INOTIFY
794 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1383 if (fs_fd >= 0)
1384 close (fs_fd);
1385#endif
1386
1387 if (backend_fd >= 0)
1388 close (backend_fd);
1389
1390#if EV_USE_PORT
1391 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
795#endif 1392#endif
796#if EV_USE_KQUEUE 1393#if EV_USE_KQUEUE
797 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1394 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
798#endif 1395#endif
799#if EV_USE_EPOLL 1396#if EV_USE_EPOLL
800 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1397 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
801#endif 1398#endif
802#if EV_USE_POLL 1399#if EV_USE_POLL
803 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1400 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
804#endif 1401#endif
805#if EV_USE_SELECT 1402#if EV_USE_SELECT
806 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1403 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
807#endif 1404#endif
808 1405
809 for (i = NUMPRI; i--; ) 1406 for (i = NUMPRI; i--; )
1407 {
810 array_free (pending, [i]); 1408 array_free (pending, [i]);
1409#if EV_IDLE_ENABLE
1410 array_free (idle, [i]);
1411#endif
1412 }
1413
1414 ev_free (anfds); anfdmax = 0;
811 1415
812 /* have to use the microsoft-never-gets-it-right macro */ 1416 /* have to use the microsoft-never-gets-it-right macro */
813 array_free_microshit (fdchange); 1417 array_free (fdchange, EMPTY);
814 array_free_microshit (timer); 1418 array_free (timer, EMPTY);
815#if EV_PERIODICS 1419#if EV_PERIODIC_ENABLE
816 array_free_microshit (periodic); 1420 array_free (periodic, EMPTY);
817#endif 1421#endif
818 array_free_microshit (idle); 1422#if EV_FORK_ENABLE
819 array_free_microshit (prepare); 1423 array_free (fork, EMPTY);
820 array_free_microshit (check); 1424#endif
1425 array_free (prepare, EMPTY);
1426 array_free (check, EMPTY);
1427#if EV_ASYNC_ENABLE
1428 array_free (async, EMPTY);
1429#endif
821 1430
822 method = 0; 1431 backend = 0;
823} 1432}
824 1433
825static void 1434#if EV_USE_INOTIFY
1435void inline_size infy_fork (EV_P);
1436#endif
1437
1438void inline_size
826loop_fork (EV_P) 1439loop_fork (EV_P)
827{ 1440{
1441#if EV_USE_PORT
1442 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1443#endif
1444#if EV_USE_KQUEUE
1445 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1446#endif
828#if EV_USE_EPOLL 1447#if EV_USE_EPOLL
829 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1448 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
830#endif 1449#endif
831#if EV_USE_KQUEUE 1450#if EV_USE_INOTIFY
832 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1451 infy_fork (EV_A);
833#endif 1452#endif
834 1453
835 if (ev_is_active (&sigev)) 1454 if (ev_is_active (&pipeev))
836 { 1455 {
837 /* default loop */ 1456 /* this "locks" the handlers against writing to the pipe */
1457 /* while we modify the fd vars */
1458 gotsig = 1;
1459#if EV_ASYNC_ENABLE
1460 gotasync = 1;
1461#endif
838 1462
839 ev_ref (EV_A); 1463 ev_ref (EV_A);
840 ev_io_stop (EV_A_ &sigev); 1464 ev_io_stop (EV_A_ &pipeev);
1465
1466#if EV_USE_EVENTFD
1467 if (evfd >= 0)
1468 close (evfd);
1469#endif
1470
1471 if (evpipe [0] >= 0)
1472 {
841 close (sigpipe [0]); 1473 close (evpipe [0]);
842 close (sigpipe [1]); 1474 close (evpipe [1]);
1475 }
843 1476
844 while (pipe (sigpipe))
845 syserr ("(libev) error creating pipe");
846
847 siginit (EV_A); 1477 evpipe_init (EV_A);
1478 /* now iterate over everything, in case we missed something */
1479 pipecb (EV_A_ &pipeev, EV_READ);
848 } 1480 }
849 1481
850 postfork = 0; 1482 postfork = 0;
851} 1483}
1484
1485#if EV_MULTIPLICITY
1486
1487struct ev_loop *
1488ev_loop_new (unsigned int flags)
1489{
1490 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1491
1492 memset (loop, 0, sizeof (struct ev_loop));
1493
1494 loop_init (EV_A_ flags);
1495
1496 if (ev_backend (EV_A))
1497 return loop;
1498
1499 return 0;
1500}
1501
1502void
1503ev_loop_destroy (EV_P)
1504{
1505 loop_destroy (EV_A);
1506 ev_free (loop);
1507}
1508
1509void
1510ev_loop_fork (EV_P)
1511{
1512 postfork = 1; /* must be in line with ev_default_fork */
1513}
1514
1515#if EV_VERIFY
1516void noinline
1517verify_watcher (EV_P_ W w)
1518{
1519 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1520
1521 if (w->pending)
1522 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1523}
1524
1525static void noinline
1526verify_heap (EV_P_ ANHE *heap, int N)
1527{
1528 int i;
1529
1530 for (i = HEAP0; i < N + HEAP0; ++i)
1531 {
1532 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1533 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1534 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1535
1536 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1537 }
1538}
1539
1540static void noinline
1541array_verify (EV_P_ W *ws, int cnt)
1542{
1543 while (cnt--)
1544 {
1545 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1546 verify_watcher (EV_A_ ws [cnt]);
1547 }
1548}
1549#endif
1550
1551void
1552ev_loop_verify (EV_P)
1553{
1554#if EV_VERIFY
1555 int i;
1556 WL w;
1557
1558 assert (activecnt >= -1);
1559
1560 assert (fdchangemax >= fdchangecnt);
1561 for (i = 0; i < fdchangecnt; ++i)
1562 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1563
1564 assert (anfdmax >= 0);
1565 for (i = 0; i < anfdmax; ++i)
1566 for (w = anfds [i].head; w; w = w->next)
1567 {
1568 verify_watcher (EV_A_ (W)w);
1569 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1570 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1571 }
1572
1573 assert (timermax >= timercnt);
1574 verify_heap (EV_A_ timers, timercnt);
1575
1576#if EV_PERIODIC_ENABLE
1577 assert (periodicmax >= periodiccnt);
1578 verify_heap (EV_A_ periodics, periodiccnt);
1579#endif
1580
1581 for (i = NUMPRI; i--; )
1582 {
1583 assert (pendingmax [i] >= pendingcnt [i]);
1584#if EV_IDLE_ENABLE
1585 assert (idleall >= 0);
1586 assert (idlemax [i] >= idlecnt [i]);
1587 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1588#endif
1589 }
1590
1591#if EV_FORK_ENABLE
1592 assert (forkmax >= forkcnt);
1593 array_verify (EV_A_ (W *)forks, forkcnt);
1594#endif
1595
1596#if EV_ASYNC_ENABLE
1597 assert (asyncmax >= asynccnt);
1598 array_verify (EV_A_ (W *)asyncs, asynccnt);
1599#endif
1600
1601 assert (preparemax >= preparecnt);
1602 array_verify (EV_A_ (W *)prepares, preparecnt);
1603
1604 assert (checkmax >= checkcnt);
1605 array_verify (EV_A_ (W *)checks, checkcnt);
1606
1607# if 0
1608 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1609 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1610# endif
1611#endif
1612}
1613
1614#endif /* multiplicity */
852 1615
853#if EV_MULTIPLICITY 1616#if EV_MULTIPLICITY
854struct ev_loop * 1617struct ev_loop *
855ev_loop_new (int methods) 1618ev_default_loop_init (unsigned int flags)
856{
857 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
858
859 memset (loop, 0, sizeof (struct ev_loop));
860
861 loop_init (EV_A_ methods);
862
863 if (ev_method (EV_A))
864 return loop;
865
866 return 0;
867}
868
869void
870ev_loop_destroy (EV_P)
871{
872 loop_destroy (EV_A);
873 ev_free (loop);
874}
875
876void
877ev_loop_fork (EV_P)
878{
879 postfork = 1;
880}
881
882#endif
883
884#if EV_MULTIPLICITY
885struct ev_loop *
886#else 1619#else
887int 1620int
1621ev_default_loop (unsigned int flags)
888#endif 1622#endif
889ev_default_loop (int methods)
890{ 1623{
891 if (sigpipe [0] == sigpipe [1])
892 if (pipe (sigpipe))
893 return 0;
894
895 if (!default_loop) 1624 if (!ev_default_loop_ptr)
896 { 1625 {
897#if EV_MULTIPLICITY 1626#if EV_MULTIPLICITY
898 struct ev_loop *loop = default_loop = &default_loop_struct; 1627 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
899#else 1628#else
900 default_loop = 1; 1629 ev_default_loop_ptr = 1;
901#endif 1630#endif
902 1631
903 loop_init (EV_A_ methods); 1632 loop_init (EV_A_ flags);
904 1633
905 if (ev_method (EV_A)) 1634 if (ev_backend (EV_A))
906 { 1635 {
907 siginit (EV_A);
908
909#ifndef WIN32 1636#ifndef _WIN32
910 ev_signal_init (&childev, childcb, SIGCHLD); 1637 ev_signal_init (&childev, childcb, SIGCHLD);
911 ev_set_priority (&childev, EV_MAXPRI); 1638 ev_set_priority (&childev, EV_MAXPRI);
912 ev_signal_start (EV_A_ &childev); 1639 ev_signal_start (EV_A_ &childev);
913 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1640 ev_unref (EV_A); /* child watcher should not keep loop alive */
914#endif 1641#endif
915 } 1642 }
916 else 1643 else
917 default_loop = 0; 1644 ev_default_loop_ptr = 0;
918 } 1645 }
919 1646
920 return default_loop; 1647 return ev_default_loop_ptr;
921} 1648}
922 1649
923void 1650void
924ev_default_destroy (void) 1651ev_default_destroy (void)
925{ 1652{
926#if EV_MULTIPLICITY 1653#if EV_MULTIPLICITY
927 struct ev_loop *loop = default_loop; 1654 struct ev_loop *loop = ev_default_loop_ptr;
928#endif 1655#endif
929 1656
930#ifndef WIN32 1657#ifndef _WIN32
931 ev_ref (EV_A); /* child watcher */ 1658 ev_ref (EV_A); /* child watcher */
932 ev_signal_stop (EV_A_ &childev); 1659 ev_signal_stop (EV_A_ &childev);
933#endif 1660#endif
934 1661
935 ev_ref (EV_A); /* signal watcher */
936 ev_io_stop (EV_A_ &sigev);
937
938 close (sigpipe [0]); sigpipe [0] = 0;
939 close (sigpipe [1]); sigpipe [1] = 0;
940
941 loop_destroy (EV_A); 1662 loop_destroy (EV_A);
942} 1663}
943 1664
944void 1665void
945ev_default_fork (void) 1666ev_default_fork (void)
946{ 1667{
947#if EV_MULTIPLICITY 1668#if EV_MULTIPLICITY
948 struct ev_loop *loop = default_loop; 1669 struct ev_loop *loop = ev_default_loop_ptr;
949#endif 1670#endif
950 1671
951 if (method) 1672 if (backend)
952 postfork = 1; 1673 postfork = 1; /* must be in line with ev_loop_fork */
953} 1674}
954 1675
955/*****************************************************************************/ 1676/*****************************************************************************/
956 1677
957static int 1678void
958any_pending (EV_P) 1679ev_invoke (EV_P_ void *w, int revents)
959{ 1680{
960 int pri; 1681 EV_CB_INVOKE ((W)w, revents);
961
962 for (pri = NUMPRI; pri--; )
963 if (pendingcnt [pri])
964 return 1;
965
966 return 0;
967} 1682}
968 1683
969static void 1684void inline_speed
970call_pending (EV_P) 1685call_pending (EV_P)
971{ 1686{
972 int pri; 1687 int pri;
973 1688
974 for (pri = NUMPRI; pri--; ) 1689 for (pri = NUMPRI; pri--; )
975 while (pendingcnt [pri]) 1690 while (pendingcnt [pri])
976 { 1691 {
977 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1692 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
978 1693
979 if (p->w) 1694 if (expect_true (p->w))
980 { 1695 {
1696 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1697
981 p->w->pending = 0; 1698 p->w->pending = 0;
982 EV_CB_INVOKE (p->w, p->events); 1699 EV_CB_INVOKE (p->w, p->events);
1700 EV_FREQUENT_CHECK;
983 } 1701 }
984 } 1702 }
985} 1703}
986 1704
987static void 1705#if EV_IDLE_ENABLE
1706void inline_size
1707idle_reify (EV_P)
1708{
1709 if (expect_false (idleall))
1710 {
1711 int pri;
1712
1713 for (pri = NUMPRI; pri--; )
1714 {
1715 if (pendingcnt [pri])
1716 break;
1717
1718 if (idlecnt [pri])
1719 {
1720 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1721 break;
1722 }
1723 }
1724 }
1725}
1726#endif
1727
1728void inline_size
988timers_reify (EV_P) 1729timers_reify (EV_P)
989{ 1730{
1731 EV_FREQUENT_CHECK;
1732
990 while (timercnt && ((WT)timers [0])->at <= mn_now) 1733 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
991 { 1734 {
992 struct ev_timer *w = timers [0]; 1735 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
993 1736
994 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1737 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
995 1738
996 /* first reschedule or stop timer */ 1739 /* first reschedule or stop timer */
997 if (w->repeat) 1740 if (w->repeat)
998 { 1741 {
1742 ev_at (w) += w->repeat;
1743 if (ev_at (w) < mn_now)
1744 ev_at (w) = mn_now;
1745
999 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1746 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1000 1747
1001 ((WT)w)->at += w->repeat; 1748 ANHE_at_cache (timers [HEAP0]);
1002 if (((WT)w)->at < mn_now)
1003 ((WT)w)->at = mn_now;
1004
1005 downheap ((WT *)timers, timercnt, 0); 1749 downheap (timers, timercnt, HEAP0);
1006 } 1750 }
1007 else 1751 else
1008 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1752 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1009 1753
1754 EV_FREQUENT_CHECK;
1010 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1755 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1011 } 1756 }
1012} 1757}
1013 1758
1014#if EV_PERIODICS 1759#if EV_PERIODIC_ENABLE
1015static void 1760void inline_size
1016periodics_reify (EV_P) 1761periodics_reify (EV_P)
1017{ 1762{
1763 EV_FREQUENT_CHECK;
1764
1018 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1765 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1019 { 1766 {
1020 struct ev_periodic *w = periodics [0]; 1767 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1021 1768
1022 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1769 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1023 1770
1024 /* first reschedule or stop timer */ 1771 /* first reschedule or stop timer */
1025 if (w->reschedule_cb) 1772 if (w->reschedule_cb)
1026 { 1773 {
1027 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1774 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1028 1775
1029 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1776 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1777
1778 ANHE_at_cache (periodics [HEAP0]);
1030 downheap ((WT *)periodics, periodiccnt, 0); 1779 downheap (periodics, periodiccnt, HEAP0);
1031 } 1780 }
1032 else if (w->interval) 1781 else if (w->interval)
1033 { 1782 {
1034 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1783 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1035 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1784 /* if next trigger time is not sufficiently in the future, put it there */
1785 /* this might happen because of floating point inexactness */
1786 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1787 {
1788 ev_at (w) += w->interval;
1789
1790 /* if interval is unreasonably low we might still have a time in the past */
1791 /* so correct this. this will make the periodic very inexact, but the user */
1792 /* has effectively asked to get triggered more often than possible */
1793 if (ev_at (w) < ev_rt_now)
1794 ev_at (w) = ev_rt_now;
1795 }
1796
1797 ANHE_at_cache (periodics [HEAP0]);
1036 downheap ((WT *)periodics, periodiccnt, 0); 1798 downheap (periodics, periodiccnt, HEAP0);
1037 } 1799 }
1038 else 1800 else
1039 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1801 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1040 1802
1803 EV_FREQUENT_CHECK;
1041 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1804 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1042 } 1805 }
1043} 1806}
1044 1807
1045static void 1808static void noinline
1046periodics_reschedule (EV_P) 1809periodics_reschedule (EV_P)
1047{ 1810{
1048 int i; 1811 int i;
1049 1812
1050 /* adjust periodics after time jump */ 1813 /* adjust periodics after time jump */
1051 for (i = 0; i < periodiccnt; ++i) 1814 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1052 { 1815 {
1053 struct ev_periodic *w = periodics [i]; 1816 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1054 1817
1055 if (w->reschedule_cb) 1818 if (w->reschedule_cb)
1056 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1819 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1057 else if (w->interval) 1820 else if (w->interval)
1058 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1821 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1822
1823 ANHE_at_cache (periodics [i]);
1824 }
1825
1826 reheap (periodics, periodiccnt);
1827}
1828#endif
1829
1830void inline_speed
1831time_update (EV_P_ ev_tstamp max_block)
1832{
1833 int i;
1834
1835#if EV_USE_MONOTONIC
1836 if (expect_true (have_monotonic))
1059 } 1837 {
1838 ev_tstamp odiff = rtmn_diff;
1060 1839
1061 /* now rebuild the heap */
1062 for (i = periodiccnt >> 1; i--; )
1063 downheap ((WT *)periodics, periodiccnt, i);
1064}
1065#endif
1066
1067inline int
1068time_update_monotonic (EV_P)
1069{
1070 mn_now = get_clock (); 1840 mn_now = get_clock ();
1071 1841
1842 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1843 /* interpolate in the meantime */
1072 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1844 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1073 { 1845 {
1074 ev_rt_now = rtmn_diff + mn_now; 1846 ev_rt_now = rtmn_diff + mn_now;
1075 return 0; 1847 return;
1076 } 1848 }
1077 else 1849
1078 {
1079 now_floor = mn_now; 1850 now_floor = mn_now;
1080 ev_rt_now = ev_time (); 1851 ev_rt_now = ev_time ();
1081 return 1;
1082 }
1083}
1084 1852
1085static void 1853 /* loop a few times, before making important decisions.
1086time_update (EV_P) 1854 * on the choice of "4": one iteration isn't enough,
1087{ 1855 * in case we get preempted during the calls to
1088 int i; 1856 * ev_time and get_clock. a second call is almost guaranteed
1089 1857 * to succeed in that case, though. and looping a few more times
1090#if EV_USE_MONOTONIC 1858 * doesn't hurt either as we only do this on time-jumps or
1091 if (expect_true (have_monotonic)) 1859 * in the unlikely event of having been preempted here.
1092 { 1860 */
1093 if (time_update_monotonic (EV_A)) 1861 for (i = 4; --i; )
1094 { 1862 {
1095 ev_tstamp odiff = rtmn_diff; 1863 rtmn_diff = ev_rt_now - mn_now;
1096 1864
1097 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1865 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1866 return; /* all is well */
1867
1868 ev_rt_now = ev_time ();
1869 mn_now = get_clock ();
1870 now_floor = mn_now;
1871 }
1872
1873# if EV_PERIODIC_ENABLE
1874 periodics_reschedule (EV_A);
1875# endif
1876 /* no timer adjustment, as the monotonic clock doesn't jump */
1877 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1878 }
1879 else
1880#endif
1881 {
1882 ev_rt_now = ev_time ();
1883
1884 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1885 {
1886#if EV_PERIODIC_ENABLE
1887 periodics_reschedule (EV_A);
1888#endif
1889 /* adjust timers. this is easy, as the offset is the same for all of them */
1890 for (i = 0; i < timercnt; ++i)
1098 { 1891 {
1099 rtmn_diff = ev_rt_now - mn_now; 1892 ANHE *he = timers + i + HEAP0;
1100 1893 ANHE_w (*he)->at += ev_rt_now - mn_now;
1101 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1894 ANHE_at_cache (*he);
1102 return; /* all is well */
1103
1104 ev_rt_now = ev_time ();
1105 mn_now = get_clock ();
1106 now_floor = mn_now;
1107 } 1895 }
1108
1109# if EV_PERIODICS
1110 periodics_reschedule (EV_A);
1111# endif
1112 /* no timer adjustment, as the monotonic clock doesn't jump */
1113 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1114 } 1896 }
1115 }
1116 else
1117#endif
1118 {
1119 ev_rt_now = ev_time ();
1120
1121 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1122 {
1123#if EV_PERIODICS
1124 periodics_reschedule (EV_A);
1125#endif
1126
1127 /* adjust timers. this is easy, as the offset is the same for all */
1128 for (i = 0; i < timercnt; ++i)
1129 ((WT)timers [i])->at += ev_rt_now - mn_now;
1130 }
1131 1897
1132 mn_now = ev_rt_now; 1898 mn_now = ev_rt_now;
1133 } 1899 }
1134} 1900}
1135 1901
… …
1148static int loop_done; 1914static int loop_done;
1149 1915
1150void 1916void
1151ev_loop (EV_P_ int flags) 1917ev_loop (EV_P_ int flags)
1152{ 1918{
1153 double block; 1919 loop_done = EVUNLOOP_CANCEL;
1154 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1920
1921 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1155 1922
1156 do 1923 do
1157 { 1924 {
1925#if EV_VERIFY >= 2
1926 ev_loop_verify (EV_A);
1927#endif
1928
1929#ifndef _WIN32
1930 if (expect_false (curpid)) /* penalise the forking check even more */
1931 if (expect_false (getpid () != curpid))
1932 {
1933 curpid = getpid ();
1934 postfork = 1;
1935 }
1936#endif
1937
1938#if EV_FORK_ENABLE
1939 /* we might have forked, so queue fork handlers */
1940 if (expect_false (postfork))
1941 if (forkcnt)
1942 {
1943 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1944 call_pending (EV_A);
1945 }
1946#endif
1947
1158 /* queue check watchers (and execute them) */ 1948 /* queue prepare watchers (and execute them) */
1159 if (expect_false (preparecnt)) 1949 if (expect_false (preparecnt))
1160 { 1950 {
1161 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1951 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1162 call_pending (EV_A); 1952 call_pending (EV_A);
1163 } 1953 }
1164 1954
1955 if (expect_false (!activecnt))
1956 break;
1957
1165 /* we might have forked, so reify kernel state if necessary */ 1958 /* we might have forked, so reify kernel state if necessary */
1166 if (expect_false (postfork)) 1959 if (expect_false (postfork))
1167 loop_fork (EV_A); 1960 loop_fork (EV_A);
1168 1961
1169 /* update fd-related kernel structures */ 1962 /* update fd-related kernel structures */
1170 fd_reify (EV_A); 1963 fd_reify (EV_A);
1171 1964
1172 /* calculate blocking time */ 1965 /* calculate blocking time */
1966 {
1967 ev_tstamp waittime = 0.;
1968 ev_tstamp sleeptime = 0.;
1173 1969
1174 /* we only need this for !monotonic clock or timers, but as we basically 1970 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1175 always have timers, we just calculate it always */
1176#if EV_USE_MONOTONIC
1177 if (expect_true (have_monotonic))
1178 time_update_monotonic (EV_A);
1179 else
1180#endif
1181 { 1971 {
1182 ev_rt_now = ev_time (); 1972 /* update time to cancel out callback processing overhead */
1183 mn_now = ev_rt_now; 1973 time_update (EV_A_ 1e100);
1184 }
1185 1974
1186 if (flags & EVLOOP_NONBLOCK || idlecnt)
1187 block = 0.;
1188 else
1189 {
1190 block = MAX_BLOCKTIME; 1975 waittime = MAX_BLOCKTIME;
1191 1976
1192 if (timercnt) 1977 if (timercnt)
1193 { 1978 {
1194 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1979 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1195 if (block > to) block = to; 1980 if (waittime > to) waittime = to;
1196 } 1981 }
1197 1982
1198#if EV_PERIODICS 1983#if EV_PERIODIC_ENABLE
1199 if (periodiccnt) 1984 if (periodiccnt)
1200 { 1985 {
1201 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1986 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1202 if (block > to) block = to; 1987 if (waittime > to) waittime = to;
1203 } 1988 }
1204#endif 1989#endif
1205 1990
1206 if (block < 0.) block = 0.; 1991 if (expect_false (waittime < timeout_blocktime))
1992 waittime = timeout_blocktime;
1993
1994 sleeptime = waittime - backend_fudge;
1995
1996 if (expect_true (sleeptime > io_blocktime))
1997 sleeptime = io_blocktime;
1998
1999 if (sleeptime)
2000 {
2001 ev_sleep (sleeptime);
2002 waittime -= sleeptime;
2003 }
1207 } 2004 }
1208 2005
1209 method_poll (EV_A_ block); 2006 ++loop_count;
2007 backend_poll (EV_A_ waittime);
1210 2008
1211 /* update ev_rt_now, do magic */ 2009 /* update ev_rt_now, do magic */
1212 time_update (EV_A); 2010 time_update (EV_A_ waittime + sleeptime);
2011 }
1213 2012
1214 /* queue pending timers and reschedule them */ 2013 /* queue pending timers and reschedule them */
1215 timers_reify (EV_A); /* relative timers called last */ 2014 timers_reify (EV_A); /* relative timers called last */
1216#if EV_PERIODICS 2015#if EV_PERIODIC_ENABLE
1217 periodics_reify (EV_A); /* absolute timers called first */ 2016 periodics_reify (EV_A); /* absolute timers called first */
1218#endif 2017#endif
1219 2018
2019#if EV_IDLE_ENABLE
1220 /* queue idle watchers unless io or timers are pending */ 2020 /* queue idle watchers unless other events are pending */
1221 if (idlecnt && !any_pending (EV_A)) 2021 idle_reify (EV_A);
1222 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2022#endif
1223 2023
1224 /* queue check watchers, to be executed first */ 2024 /* queue check watchers, to be executed first */
1225 if (checkcnt) 2025 if (expect_false (checkcnt))
1226 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2026 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1227 2027
1228 call_pending (EV_A); 2028 call_pending (EV_A);
1229 } 2029 }
1230 while (activecnt && !loop_done); 2030 while (expect_true (
2031 activecnt
2032 && !loop_done
2033 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2034 ));
1231 2035
1232 if (loop_done != 2) 2036 if (loop_done == EVUNLOOP_ONE)
1233 loop_done = 0; 2037 loop_done = EVUNLOOP_CANCEL;
1234} 2038}
1235 2039
1236void 2040void
1237ev_unloop (EV_P_ int how) 2041ev_unloop (EV_P_ int how)
1238{ 2042{
1239 loop_done = how; 2043 loop_done = how;
1240} 2044}
1241 2045
1242/*****************************************************************************/ 2046/*****************************************************************************/
1243 2047
1244inline void 2048void inline_size
1245wlist_add (WL *head, WL elem) 2049wlist_add (WL *head, WL elem)
1246{ 2050{
1247 elem->next = *head; 2051 elem->next = *head;
1248 *head = elem; 2052 *head = elem;
1249} 2053}
1250 2054
1251inline void 2055void inline_size
1252wlist_del (WL *head, WL elem) 2056wlist_del (WL *head, WL elem)
1253{ 2057{
1254 while (*head) 2058 while (*head)
1255 { 2059 {
1256 if (*head == elem) 2060 if (*head == elem)
… …
1261 2065
1262 head = &(*head)->next; 2066 head = &(*head)->next;
1263 } 2067 }
1264} 2068}
1265 2069
1266inline void 2070void inline_speed
1267ev_clear_pending (EV_P_ W w) 2071clear_pending (EV_P_ W w)
1268{ 2072{
1269 if (w->pending) 2073 if (w->pending)
1270 { 2074 {
1271 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2075 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1272 w->pending = 0; 2076 w->pending = 0;
1273 } 2077 }
1274} 2078}
1275 2079
1276inline void 2080int
2081ev_clear_pending (EV_P_ void *w)
2082{
2083 W w_ = (W)w;
2084 int pending = w_->pending;
2085
2086 if (expect_true (pending))
2087 {
2088 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2089 w_->pending = 0;
2090 p->w = 0;
2091 return p->events;
2092 }
2093 else
2094 return 0;
2095}
2096
2097void inline_size
2098pri_adjust (EV_P_ W w)
2099{
2100 int pri = w->priority;
2101 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2102 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2103 w->priority = pri;
2104}
2105
2106void inline_speed
1277ev_start (EV_P_ W w, int active) 2107ev_start (EV_P_ W w, int active)
1278{ 2108{
1279 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2109 pri_adjust (EV_A_ w);
1280 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1281
1282 w->active = active; 2110 w->active = active;
1283 ev_ref (EV_A); 2111 ev_ref (EV_A);
1284} 2112}
1285 2113
1286inline void 2114void inline_size
1287ev_stop (EV_P_ W w) 2115ev_stop (EV_P_ W w)
1288{ 2116{
1289 ev_unref (EV_A); 2117 ev_unref (EV_A);
1290 w->active = 0; 2118 w->active = 0;
1291} 2119}
1292 2120
1293/*****************************************************************************/ 2121/*****************************************************************************/
1294 2122
1295void 2123void noinline
1296ev_io_start (EV_P_ struct ev_io *w) 2124ev_io_start (EV_P_ ev_io *w)
1297{ 2125{
1298 int fd = w->fd; 2126 int fd = w->fd;
1299 2127
1300 if (ev_is_active (w)) 2128 if (expect_false (ev_is_active (w)))
1301 return; 2129 return;
1302 2130
1303 assert (("ev_io_start called with negative fd", fd >= 0)); 2131 assert (("ev_io_start called with negative fd", fd >= 0));
2132
2133 EV_FREQUENT_CHECK;
1304 2134
1305 ev_start (EV_A_ (W)w, 1); 2135 ev_start (EV_A_ (W)w, 1);
1306 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2136 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1307 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2137 wlist_add (&anfds[fd].head, (WL)w);
1308 2138
1309 fd_change (EV_A_ fd); 2139 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1310} 2140 w->events &= ~EV_IOFDSET;
1311 2141
1312void 2142 EV_FREQUENT_CHECK;
2143}
2144
2145void noinline
1313ev_io_stop (EV_P_ struct ev_io *w) 2146ev_io_stop (EV_P_ ev_io *w)
1314{ 2147{
1315 ev_clear_pending (EV_A_ (W)w); 2148 clear_pending (EV_A_ (W)w);
1316 if (!ev_is_active (w)) 2149 if (expect_false (!ev_is_active (w)))
1317 return; 2150 return;
1318 2151
1319 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2152 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1320 2153
2154 EV_FREQUENT_CHECK;
2155
1321 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2156 wlist_del (&anfds[w->fd].head, (WL)w);
1322 ev_stop (EV_A_ (W)w); 2157 ev_stop (EV_A_ (W)w);
1323 2158
1324 fd_change (EV_A_ w->fd); 2159 fd_change (EV_A_ w->fd, 1);
1325}
1326 2160
1327void 2161 EV_FREQUENT_CHECK;
2162}
2163
2164void noinline
1328ev_timer_start (EV_P_ struct ev_timer *w) 2165ev_timer_start (EV_P_ ev_timer *w)
1329{ 2166{
2167 if (expect_false (ev_is_active (w)))
2168 return;
2169
2170 ev_at (w) += mn_now;
2171
2172 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2173
2174 EV_FREQUENT_CHECK;
2175
2176 ++timercnt;
2177 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2178 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2179 ANHE_w (timers [ev_active (w)]) = (WT)w;
2180 ANHE_at_cache (timers [ev_active (w)]);
2181 upheap (timers, ev_active (w));
2182
2183 EV_FREQUENT_CHECK;
2184
2185 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2186}
2187
2188void noinline
2189ev_timer_stop (EV_P_ ev_timer *w)
2190{
2191 clear_pending (EV_A_ (W)w);
2192 if (expect_false (!ev_is_active (w)))
2193 return;
2194
2195 EV_FREQUENT_CHECK;
2196
2197 {
2198 int active = ev_active (w);
2199
2200 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2201
2202 --timercnt;
2203
2204 if (expect_true (active < timercnt + HEAP0))
2205 {
2206 timers [active] = timers [timercnt + HEAP0];
2207 adjustheap (timers, timercnt, active);
2208 }
2209 }
2210
2211 EV_FREQUENT_CHECK;
2212
2213 ev_at (w) -= mn_now;
2214
2215 ev_stop (EV_A_ (W)w);
2216}
2217
2218void noinline
2219ev_timer_again (EV_P_ ev_timer *w)
2220{
2221 EV_FREQUENT_CHECK;
2222
1330 if (ev_is_active (w)) 2223 if (ev_is_active (w))
1331 return;
1332
1333 ((WT)w)->at += mn_now;
1334
1335 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1336
1337 ev_start (EV_A_ (W)w, ++timercnt);
1338 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1339 timers [timercnt - 1] = w;
1340 upheap ((WT *)timers, timercnt - 1);
1341
1342 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1343}
1344
1345void
1346ev_timer_stop (EV_P_ struct ev_timer *w)
1347{
1348 ev_clear_pending (EV_A_ (W)w);
1349 if (!ev_is_active (w))
1350 return;
1351
1352 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1353
1354 if (((W)w)->active < timercnt--)
1355 {
1356 timers [((W)w)->active - 1] = timers [timercnt];
1357 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1358 }
1359
1360 ((WT)w)->at -= mn_now;
1361
1362 ev_stop (EV_A_ (W)w);
1363}
1364
1365void
1366ev_timer_again (EV_P_ struct ev_timer *w)
1367{
1368 if (ev_is_active (w))
1369 { 2224 {
1370 if (w->repeat) 2225 if (w->repeat)
1371 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat); 2226 {
2227 ev_at (w) = mn_now + w->repeat;
2228 ANHE_at_cache (timers [ev_active (w)]);
2229 adjustheap (timers, timercnt, ev_active (w));
2230 }
1372 else 2231 else
1373 ev_timer_stop (EV_A_ w); 2232 ev_timer_stop (EV_A_ w);
1374 } 2233 }
1375 else if (w->repeat) 2234 else if (w->repeat)
2235 {
2236 ev_at (w) = w->repeat;
1376 ev_timer_start (EV_A_ w); 2237 ev_timer_start (EV_A_ w);
1377} 2238 }
1378 2239
2240 EV_FREQUENT_CHECK;
2241}
2242
1379#if EV_PERIODICS 2243#if EV_PERIODIC_ENABLE
1380void 2244void noinline
1381ev_periodic_start (EV_P_ struct ev_periodic *w) 2245ev_periodic_start (EV_P_ ev_periodic *w)
1382{ 2246{
1383 if (ev_is_active (w)) 2247 if (expect_false (ev_is_active (w)))
1384 return; 2248 return;
1385 2249
1386 if (w->reschedule_cb) 2250 if (w->reschedule_cb)
1387 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2251 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1388 else if (w->interval) 2252 else if (w->interval)
1389 { 2253 {
1390 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2254 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1391 /* this formula differs from the one in periodic_reify because we do not always round up */ 2255 /* this formula differs from the one in periodic_reify because we do not always round up */
1392 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2256 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1393 } 2257 }
2258 else
2259 ev_at (w) = w->offset;
1394 2260
2261 EV_FREQUENT_CHECK;
2262
2263 ++periodiccnt;
1395 ev_start (EV_A_ (W)w, ++periodiccnt); 2264 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1396 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2265 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1397 periodics [periodiccnt - 1] = w; 2266 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1398 upheap ((WT *)periodics, periodiccnt - 1); 2267 ANHE_at_cache (periodics [ev_active (w)]);
2268 upheap (periodics, ev_active (w));
1399 2269
2270 EV_FREQUENT_CHECK;
2271
1400 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2272 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1401} 2273}
1402 2274
1403void 2275void noinline
1404ev_periodic_stop (EV_P_ struct ev_periodic *w) 2276ev_periodic_stop (EV_P_ ev_periodic *w)
1405{ 2277{
1406 ev_clear_pending (EV_A_ (W)w); 2278 clear_pending (EV_A_ (W)w);
1407 if (!ev_is_active (w)) 2279 if (expect_false (!ev_is_active (w)))
1408 return; 2280 return;
1409 2281
2282 EV_FREQUENT_CHECK;
2283
2284 {
2285 int active = ev_active (w);
2286
1410 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2287 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1411 2288
1412 if (((W)w)->active < periodiccnt--) 2289 --periodiccnt;
2290
2291 if (expect_true (active < periodiccnt + HEAP0))
1413 { 2292 {
1414 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2293 periodics [active] = periodics [periodiccnt + HEAP0];
1415 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2294 adjustheap (periodics, periodiccnt, active);
1416 } 2295 }
2296 }
2297
2298 EV_FREQUENT_CHECK;
1417 2299
1418 ev_stop (EV_A_ (W)w); 2300 ev_stop (EV_A_ (W)w);
1419} 2301}
1420 2302
1421void 2303void noinline
1422ev_periodic_again (EV_P_ struct ev_periodic *w) 2304ev_periodic_again (EV_P_ ev_periodic *w)
1423{ 2305{
1424 /* TODO: use adjustheap and recalculation */ 2306 /* TODO: use adjustheap and recalculation */
1425 ev_periodic_stop (EV_A_ w); 2307 ev_periodic_stop (EV_A_ w);
1426 ev_periodic_start (EV_A_ w); 2308 ev_periodic_start (EV_A_ w);
1427} 2309}
1428#endif 2310#endif
1429 2311
1430void
1431ev_idle_start (EV_P_ struct ev_idle *w)
1432{
1433 if (ev_is_active (w))
1434 return;
1435
1436 ev_start (EV_A_ (W)w, ++idlecnt);
1437 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1438 idles [idlecnt - 1] = w;
1439}
1440
1441void
1442ev_idle_stop (EV_P_ struct ev_idle *w)
1443{
1444 ev_clear_pending (EV_A_ (W)w);
1445 if (ev_is_active (w))
1446 return;
1447
1448 idles [((W)w)->active - 1] = idles [--idlecnt];
1449 ev_stop (EV_A_ (W)w);
1450}
1451
1452void
1453ev_prepare_start (EV_P_ struct ev_prepare *w)
1454{
1455 if (ev_is_active (w))
1456 return;
1457
1458 ev_start (EV_A_ (W)w, ++preparecnt);
1459 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1460 prepares [preparecnt - 1] = w;
1461}
1462
1463void
1464ev_prepare_stop (EV_P_ struct ev_prepare *w)
1465{
1466 ev_clear_pending (EV_A_ (W)w);
1467 if (ev_is_active (w))
1468 return;
1469
1470 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1471 ev_stop (EV_A_ (W)w);
1472}
1473
1474void
1475ev_check_start (EV_P_ struct ev_check *w)
1476{
1477 if (ev_is_active (w))
1478 return;
1479
1480 ev_start (EV_A_ (W)w, ++checkcnt);
1481 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1482 checks [checkcnt - 1] = w;
1483}
1484
1485void
1486ev_check_stop (EV_P_ struct ev_check *w)
1487{
1488 ev_clear_pending (EV_A_ (W)w);
1489 if (!ev_is_active (w))
1490 return;
1491
1492 checks [((W)w)->active - 1] = checks [--checkcnt];
1493 ev_stop (EV_A_ (W)w);
1494}
1495
1496#ifndef SA_RESTART 2312#ifndef SA_RESTART
1497# define SA_RESTART 0 2313# define SA_RESTART 0
1498#endif 2314#endif
1499 2315
1500void 2316void noinline
1501ev_signal_start (EV_P_ struct ev_signal *w) 2317ev_signal_start (EV_P_ ev_signal *w)
1502{ 2318{
1503#if EV_MULTIPLICITY 2319#if EV_MULTIPLICITY
1504 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2320 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1505#endif 2321#endif
1506 if (ev_is_active (w)) 2322 if (expect_false (ev_is_active (w)))
1507 return; 2323 return;
1508 2324
1509 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2325 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1510 2326
2327 evpipe_init (EV_A);
2328
2329 EV_FREQUENT_CHECK;
2330
2331 {
2332#ifndef _WIN32
2333 sigset_t full, prev;
2334 sigfillset (&full);
2335 sigprocmask (SIG_SETMASK, &full, &prev);
2336#endif
2337
2338 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2339
2340#ifndef _WIN32
2341 sigprocmask (SIG_SETMASK, &prev, 0);
2342#endif
2343 }
2344
1511 ev_start (EV_A_ (W)w, 1); 2345 ev_start (EV_A_ (W)w, 1);
1512 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1513 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2346 wlist_add (&signals [w->signum - 1].head, (WL)w);
1514 2347
1515 if (!((WL)w)->next) 2348 if (!((WL)w)->next)
1516 { 2349 {
1517#if WIN32 2350#if _WIN32
1518 signal (w->signum, sighandler); 2351 signal (w->signum, ev_sighandler);
1519#else 2352#else
1520 struct sigaction sa; 2353 struct sigaction sa;
1521 sa.sa_handler = sighandler; 2354 sa.sa_handler = ev_sighandler;
1522 sigfillset (&sa.sa_mask); 2355 sigfillset (&sa.sa_mask);
1523 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2356 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1524 sigaction (w->signum, &sa, 0); 2357 sigaction (w->signum, &sa, 0);
1525#endif 2358#endif
1526 } 2359 }
1527}
1528 2360
1529void 2361 EV_FREQUENT_CHECK;
2362}
2363
2364void noinline
1530ev_signal_stop (EV_P_ struct ev_signal *w) 2365ev_signal_stop (EV_P_ ev_signal *w)
1531{ 2366{
1532 ev_clear_pending (EV_A_ (W)w); 2367 clear_pending (EV_A_ (W)w);
1533 if (!ev_is_active (w)) 2368 if (expect_false (!ev_is_active (w)))
1534 return; 2369 return;
1535 2370
2371 EV_FREQUENT_CHECK;
2372
1536 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2373 wlist_del (&signals [w->signum - 1].head, (WL)w);
1537 ev_stop (EV_A_ (W)w); 2374 ev_stop (EV_A_ (W)w);
1538 2375
1539 if (!signals [w->signum - 1].head) 2376 if (!signals [w->signum - 1].head)
1540 signal (w->signum, SIG_DFL); 2377 signal (w->signum, SIG_DFL);
1541}
1542 2378
2379 EV_FREQUENT_CHECK;
2380}
2381
1543void 2382void
1544ev_child_start (EV_P_ struct ev_child *w) 2383ev_child_start (EV_P_ ev_child *w)
1545{ 2384{
1546#if EV_MULTIPLICITY 2385#if EV_MULTIPLICITY
1547 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2386 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1548#endif 2387#endif
1549 if (ev_is_active (w)) 2388 if (expect_false (ev_is_active (w)))
1550 return; 2389 return;
1551 2390
2391 EV_FREQUENT_CHECK;
2392
1552 ev_start (EV_A_ (W)w, 1); 2393 ev_start (EV_A_ (W)w, 1);
1553 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2394 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1554}
1555 2395
2396 EV_FREQUENT_CHECK;
2397}
2398
1556void 2399void
1557ev_child_stop (EV_P_ struct ev_child *w) 2400ev_child_stop (EV_P_ ev_child *w)
1558{ 2401{
1559 ev_clear_pending (EV_A_ (W)w); 2402 clear_pending (EV_A_ (W)w);
1560 if (!ev_is_active (w)) 2403 if (expect_false (!ev_is_active (w)))
1561 return; 2404 return;
1562 2405
2406 EV_FREQUENT_CHECK;
2407
1563 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2408 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1564 ev_stop (EV_A_ (W)w); 2409 ev_stop (EV_A_ (W)w);
2410
2411 EV_FREQUENT_CHECK;
1565} 2412}
2413
2414#if EV_STAT_ENABLE
2415
2416# ifdef _WIN32
2417# undef lstat
2418# define lstat(a,b) _stati64 (a,b)
2419# endif
2420
2421#define DEF_STAT_INTERVAL 5.0074891
2422#define MIN_STAT_INTERVAL 0.1074891
2423
2424static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2425
2426#if EV_USE_INOTIFY
2427# define EV_INOTIFY_BUFSIZE 8192
2428
2429static void noinline
2430infy_add (EV_P_ ev_stat *w)
2431{
2432 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);
2433
2434 if (w->wd < 0)
2435 {
2436 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2437
2438 /* monitor some parent directory for speedup hints */
2439 /* note that exceeding the hardcoded limit is not a correctness issue, */
2440 /* but an efficiency issue only */
2441 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2442 {
2443 char path [4096];
2444 strcpy (path, w->path);
2445
2446 do
2447 {
2448 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2449 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2450
2451 char *pend = strrchr (path, '/');
2452
2453 if (!pend)
2454 break; /* whoops, no '/', complain to your admin */
2455
2456 *pend = 0;
2457 w->wd = inotify_add_watch (fs_fd, path, mask);
2458 }
2459 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2460 }
2461 }
2462 else
2463 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2464
2465 if (w->wd >= 0)
2466 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2467}
2468
2469static void noinline
2470infy_del (EV_P_ ev_stat *w)
2471{
2472 int slot;
2473 int wd = w->wd;
2474
2475 if (wd < 0)
2476 return;
2477
2478 w->wd = -2;
2479 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2480 wlist_del (&fs_hash [slot].head, (WL)w);
2481
2482 /* remove this watcher, if others are watching it, they will rearm */
2483 inotify_rm_watch (fs_fd, wd);
2484}
2485
2486static void noinline
2487infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2488{
2489 if (slot < 0)
2490 /* overflow, need to check for all hahs slots */
2491 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2492 infy_wd (EV_A_ slot, wd, ev);
2493 else
2494 {
2495 WL w_;
2496
2497 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2498 {
2499 ev_stat *w = (ev_stat *)w_;
2500 w_ = w_->next; /* lets us remove this watcher and all before it */
2501
2502 if (w->wd == wd || wd == -1)
2503 {
2504 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2505 {
2506 w->wd = -1;
2507 infy_add (EV_A_ w); /* re-add, no matter what */
2508 }
2509
2510 stat_timer_cb (EV_A_ &w->timer, 0);
2511 }
2512 }
2513 }
2514}
2515
2516static void
2517infy_cb (EV_P_ ev_io *w, int revents)
2518{
2519 char buf [EV_INOTIFY_BUFSIZE];
2520 struct inotify_event *ev = (struct inotify_event *)buf;
2521 int ofs;
2522 int len = read (fs_fd, buf, sizeof (buf));
2523
2524 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2525 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2526}
2527
2528void inline_size
2529infy_init (EV_P)
2530{
2531 if (fs_fd != -2)
2532 return;
2533
2534 fs_fd = inotify_init ();
2535
2536 if (fs_fd >= 0)
2537 {
2538 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2539 ev_set_priority (&fs_w, EV_MAXPRI);
2540 ev_io_start (EV_A_ &fs_w);
2541 }
2542}
2543
2544void inline_size
2545infy_fork (EV_P)
2546{
2547 int slot;
2548
2549 if (fs_fd < 0)
2550 return;
2551
2552 close (fs_fd);
2553 fs_fd = inotify_init ();
2554
2555 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2556 {
2557 WL w_ = fs_hash [slot].head;
2558 fs_hash [slot].head = 0;
2559
2560 while (w_)
2561 {
2562 ev_stat *w = (ev_stat *)w_;
2563 w_ = w_->next; /* lets us add this watcher */
2564
2565 w->wd = -1;
2566
2567 if (fs_fd >= 0)
2568 infy_add (EV_A_ w); /* re-add, no matter what */
2569 else
2570 ev_timer_start (EV_A_ &w->timer);
2571 }
2572
2573 }
2574}
2575
2576#endif
2577
2578#ifdef _WIN32
2579# define EV_LSTAT(p,b) _stati64 (p, b)
2580#else
2581# define EV_LSTAT(p,b) lstat (p, b)
2582#endif
2583
2584void
2585ev_stat_stat (EV_P_ ev_stat *w)
2586{
2587 if (lstat (w->path, &w->attr) < 0)
2588 w->attr.st_nlink = 0;
2589 else if (!w->attr.st_nlink)
2590 w->attr.st_nlink = 1;
2591}
2592
2593static void noinline
2594stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2595{
2596 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2597
2598 /* we copy this here each the time so that */
2599 /* prev has the old value when the callback gets invoked */
2600 w->prev = w->attr;
2601 ev_stat_stat (EV_A_ w);
2602
2603 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2604 if (
2605 w->prev.st_dev != w->attr.st_dev
2606 || w->prev.st_ino != w->attr.st_ino
2607 || w->prev.st_mode != w->attr.st_mode
2608 || w->prev.st_nlink != w->attr.st_nlink
2609 || w->prev.st_uid != w->attr.st_uid
2610 || w->prev.st_gid != w->attr.st_gid
2611 || w->prev.st_rdev != w->attr.st_rdev
2612 || w->prev.st_size != w->attr.st_size
2613 || w->prev.st_atime != w->attr.st_atime
2614 || w->prev.st_mtime != w->attr.st_mtime
2615 || w->prev.st_ctime != w->attr.st_ctime
2616 ) {
2617 #if EV_USE_INOTIFY
2618 infy_del (EV_A_ w);
2619 infy_add (EV_A_ w);
2620 ev_stat_stat (EV_A_ w); /* avoid race... */
2621 #endif
2622
2623 ev_feed_event (EV_A_ w, EV_STAT);
2624 }
2625}
2626
2627void
2628ev_stat_start (EV_P_ ev_stat *w)
2629{
2630 if (expect_false (ev_is_active (w)))
2631 return;
2632
2633 /* since we use memcmp, we need to clear any padding data etc. */
2634 memset (&w->prev, 0, sizeof (ev_statdata));
2635 memset (&w->attr, 0, sizeof (ev_statdata));
2636
2637 ev_stat_stat (EV_A_ w);
2638
2639 if (w->interval < MIN_STAT_INTERVAL)
2640 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2641
2642 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2643 ev_set_priority (&w->timer, ev_priority (w));
2644
2645#if EV_USE_INOTIFY
2646 infy_init (EV_A);
2647
2648 if (fs_fd >= 0)
2649 infy_add (EV_A_ w);
2650 else
2651#endif
2652 ev_timer_start (EV_A_ &w->timer);
2653
2654 ev_start (EV_A_ (W)w, 1);
2655
2656 EV_FREQUENT_CHECK;
2657}
2658
2659void
2660ev_stat_stop (EV_P_ ev_stat *w)
2661{
2662 clear_pending (EV_A_ (W)w);
2663 if (expect_false (!ev_is_active (w)))
2664 return;
2665
2666 EV_FREQUENT_CHECK;
2667
2668#if EV_USE_INOTIFY
2669 infy_del (EV_A_ w);
2670#endif
2671 ev_timer_stop (EV_A_ &w->timer);
2672
2673 ev_stop (EV_A_ (W)w);
2674
2675 EV_FREQUENT_CHECK;
2676}
2677#endif
2678
2679#if EV_IDLE_ENABLE
2680void
2681ev_idle_start (EV_P_ ev_idle *w)
2682{
2683 if (expect_false (ev_is_active (w)))
2684 return;
2685
2686 pri_adjust (EV_A_ (W)w);
2687
2688 EV_FREQUENT_CHECK;
2689
2690 {
2691 int active = ++idlecnt [ABSPRI (w)];
2692
2693 ++idleall;
2694 ev_start (EV_A_ (W)w, active);
2695
2696 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2697 idles [ABSPRI (w)][active - 1] = w;
2698 }
2699
2700 EV_FREQUENT_CHECK;
2701}
2702
2703void
2704ev_idle_stop (EV_P_ ev_idle *w)
2705{
2706 clear_pending (EV_A_ (W)w);
2707 if (expect_false (!ev_is_active (w)))
2708 return;
2709
2710 EV_FREQUENT_CHECK;
2711
2712 {
2713 int active = ev_active (w);
2714
2715 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2716 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2717
2718 ev_stop (EV_A_ (W)w);
2719 --idleall;
2720 }
2721
2722 EV_FREQUENT_CHECK;
2723}
2724#endif
2725
2726void
2727ev_prepare_start (EV_P_ ev_prepare *w)
2728{
2729 if (expect_false (ev_is_active (w)))
2730 return;
2731
2732 EV_FREQUENT_CHECK;
2733
2734 ev_start (EV_A_ (W)w, ++preparecnt);
2735 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2736 prepares [preparecnt - 1] = w;
2737
2738 EV_FREQUENT_CHECK;
2739}
2740
2741void
2742ev_prepare_stop (EV_P_ ev_prepare *w)
2743{
2744 clear_pending (EV_A_ (W)w);
2745 if (expect_false (!ev_is_active (w)))
2746 return;
2747
2748 EV_FREQUENT_CHECK;
2749
2750 {
2751 int active = ev_active (w);
2752
2753 prepares [active - 1] = prepares [--preparecnt];
2754 ev_active (prepares [active - 1]) = active;
2755 }
2756
2757 ev_stop (EV_A_ (W)w);
2758
2759 EV_FREQUENT_CHECK;
2760}
2761
2762void
2763ev_check_start (EV_P_ ev_check *w)
2764{
2765 if (expect_false (ev_is_active (w)))
2766 return;
2767
2768 EV_FREQUENT_CHECK;
2769
2770 ev_start (EV_A_ (W)w, ++checkcnt);
2771 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2772 checks [checkcnt - 1] = w;
2773
2774 EV_FREQUENT_CHECK;
2775}
2776
2777void
2778ev_check_stop (EV_P_ ev_check *w)
2779{
2780 clear_pending (EV_A_ (W)w);
2781 if (expect_false (!ev_is_active (w)))
2782 return;
2783
2784 EV_FREQUENT_CHECK;
2785
2786 {
2787 int active = ev_active (w);
2788
2789 checks [active - 1] = checks [--checkcnt];
2790 ev_active (checks [active - 1]) = active;
2791 }
2792
2793 ev_stop (EV_A_ (W)w);
2794
2795 EV_FREQUENT_CHECK;
2796}
2797
2798#if EV_EMBED_ENABLE
2799void noinline
2800ev_embed_sweep (EV_P_ ev_embed *w)
2801{
2802 ev_loop (w->other, EVLOOP_NONBLOCK);
2803}
2804
2805static void
2806embed_io_cb (EV_P_ ev_io *io, int revents)
2807{
2808 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2809
2810 if (ev_cb (w))
2811 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2812 else
2813 ev_loop (w->other, EVLOOP_NONBLOCK);
2814}
2815
2816static void
2817embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2818{
2819 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2820
2821 {
2822 struct ev_loop *loop = w->other;
2823
2824 while (fdchangecnt)
2825 {
2826 fd_reify (EV_A);
2827 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2828 }
2829 }
2830}
2831
2832#if 0
2833static void
2834embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2835{
2836 ev_idle_stop (EV_A_ idle);
2837}
2838#endif
2839
2840void
2841ev_embed_start (EV_P_ ev_embed *w)
2842{
2843 if (expect_false (ev_is_active (w)))
2844 return;
2845
2846 {
2847 struct ev_loop *loop = w->other;
2848 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2849 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2850 }
2851
2852 EV_FREQUENT_CHECK;
2853
2854 ev_set_priority (&w->io, ev_priority (w));
2855 ev_io_start (EV_A_ &w->io);
2856
2857 ev_prepare_init (&w->prepare, embed_prepare_cb);
2858 ev_set_priority (&w->prepare, EV_MINPRI);
2859 ev_prepare_start (EV_A_ &w->prepare);
2860
2861 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2862
2863 ev_start (EV_A_ (W)w, 1);
2864
2865 EV_FREQUENT_CHECK;
2866}
2867
2868void
2869ev_embed_stop (EV_P_ ev_embed *w)
2870{
2871 clear_pending (EV_A_ (W)w);
2872 if (expect_false (!ev_is_active (w)))
2873 return;
2874
2875 EV_FREQUENT_CHECK;
2876
2877 ev_io_stop (EV_A_ &w->io);
2878 ev_prepare_stop (EV_A_ &w->prepare);
2879
2880 ev_stop (EV_A_ (W)w);
2881
2882 EV_FREQUENT_CHECK;
2883}
2884#endif
2885
2886#if EV_FORK_ENABLE
2887void
2888ev_fork_start (EV_P_ ev_fork *w)
2889{
2890 if (expect_false (ev_is_active (w)))
2891 return;
2892
2893 EV_FREQUENT_CHECK;
2894
2895 ev_start (EV_A_ (W)w, ++forkcnt);
2896 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2897 forks [forkcnt - 1] = w;
2898
2899 EV_FREQUENT_CHECK;
2900}
2901
2902void
2903ev_fork_stop (EV_P_ ev_fork *w)
2904{
2905 clear_pending (EV_A_ (W)w);
2906 if (expect_false (!ev_is_active (w)))
2907 return;
2908
2909 EV_FREQUENT_CHECK;
2910
2911 {
2912 int active = ev_active (w);
2913
2914 forks [active - 1] = forks [--forkcnt];
2915 ev_active (forks [active - 1]) = active;
2916 }
2917
2918 ev_stop (EV_A_ (W)w);
2919
2920 EV_FREQUENT_CHECK;
2921}
2922#endif
2923
2924#if EV_ASYNC_ENABLE
2925void
2926ev_async_start (EV_P_ ev_async *w)
2927{
2928 if (expect_false (ev_is_active (w)))
2929 return;
2930
2931 evpipe_init (EV_A);
2932
2933 EV_FREQUENT_CHECK;
2934
2935 ev_start (EV_A_ (W)w, ++asynccnt);
2936 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2937 asyncs [asynccnt - 1] = w;
2938
2939 EV_FREQUENT_CHECK;
2940}
2941
2942void
2943ev_async_stop (EV_P_ ev_async *w)
2944{
2945 clear_pending (EV_A_ (W)w);
2946 if (expect_false (!ev_is_active (w)))
2947 return;
2948
2949 EV_FREQUENT_CHECK;
2950
2951 {
2952 int active = ev_active (w);
2953
2954 asyncs [active - 1] = asyncs [--asynccnt];
2955 ev_active (asyncs [active - 1]) = active;
2956 }
2957
2958 ev_stop (EV_A_ (W)w);
2959
2960 EV_FREQUENT_CHECK;
2961}
2962
2963void
2964ev_async_send (EV_P_ ev_async *w)
2965{
2966 w->sent = 1;
2967 evpipe_write (EV_A_ &gotasync);
2968}
2969#endif
1566 2970
1567/*****************************************************************************/ 2971/*****************************************************************************/
1568 2972
1569struct ev_once 2973struct ev_once
1570{ 2974{
1571 struct ev_io io; 2975 ev_io io;
1572 struct ev_timer to; 2976 ev_timer to;
1573 void (*cb)(int revents, void *arg); 2977 void (*cb)(int revents, void *arg);
1574 void *arg; 2978 void *arg;
1575}; 2979};
1576 2980
1577static void 2981static void
… …
1586 2990
1587 cb (revents, arg); 2991 cb (revents, arg);
1588} 2992}
1589 2993
1590static void 2994static void
1591once_cb_io (EV_P_ struct ev_io *w, int revents) 2995once_cb_io (EV_P_ ev_io *w, int revents)
1592{ 2996{
1593 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2997 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1594} 2998}
1595 2999
1596static void 3000static void
1597once_cb_to (EV_P_ struct ev_timer *w, int revents) 3001once_cb_to (EV_P_ ev_timer *w, int revents)
1598{ 3002{
1599 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3003 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1600} 3004}
1601 3005
1602void 3006void
1603ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3007ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1604{ 3008{
1605 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3009 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1606 3010
1607 if (!once) 3011 if (expect_false (!once))
3012 {
1608 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3013 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1609 else 3014 return;
1610 { 3015 }
3016
1611 once->cb = cb; 3017 once->cb = cb;
1612 once->arg = arg; 3018 once->arg = arg;
1613 3019
1614 ev_init (&once->io, once_cb_io); 3020 ev_init (&once->io, once_cb_io);
1615 if (fd >= 0) 3021 if (fd >= 0)
1616 { 3022 {
1617 ev_io_set (&once->io, fd, events); 3023 ev_io_set (&once->io, fd, events);
1618 ev_io_start (EV_A_ &once->io); 3024 ev_io_start (EV_A_ &once->io);
1619 } 3025 }
1620 3026
1621 ev_init (&once->to, once_cb_to); 3027 ev_init (&once->to, once_cb_to);
1622 if (timeout >= 0.) 3028 if (timeout >= 0.)
1623 { 3029 {
1624 ev_timer_set (&once->to, timeout, 0.); 3030 ev_timer_set (&once->to, timeout, 0.);
1625 ev_timer_start (EV_A_ &once->to); 3031 ev_timer_start (EV_A_ &once->to);
1626 }
1627 } 3032 }
1628} 3033}
3034
3035#if EV_MULTIPLICITY
3036 #include "ev_wrap.h"
3037#endif
1629 3038
1630#ifdef __cplusplus 3039#ifdef __cplusplus
1631} 3040}
1632#endif 3041#endif
1633 3042

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