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Comparing libev/ev.c (file contents):
Revision 1.115 by root, Wed Nov 14 04:53:21 2007 UTC vs.
Revision 1.266 by root, Fri Oct 24 08:15:33 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
38 51
39# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 53# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
42# endif 55# endif
43# ifndef EV_USE_REALTIME 56# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
45# endif 58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
46# endif 66# endif
47 67
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
50# endif 74# endif
51 75
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
53# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
54# endif 82# endif
55 83
56# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
57# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
58# endif 90# endif
59 91
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
62# endif 98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
63 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
64#endif 132#endif
65 133
66#include <math.h> 134#include <math.h>
67#include <stdlib.h> 135#include <stdlib.h>
68#include <fcntl.h> 136#include <fcntl.h>
… …
75#include <sys/types.h> 143#include <sys/types.h>
76#include <time.h> 144#include <time.h>
77 145
78#include <signal.h> 146#include <signal.h>
79 147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
80#ifndef _WIN32 154#ifndef _WIN32
81# include <unistd.h>
82# include <sys/time.h> 155# include <sys/time.h>
83# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
84#else 158#else
159# include <io.h>
85# define WIN32_LEAN_AND_MEAN 160# define WIN32_LEAN_AND_MEAN
86# include <windows.h> 161# include <windows.h>
87# ifndef EV_SELECT_IS_WINSOCKET 162# ifndef EV_SELECT_IS_WINSOCKET
88# define EV_SELECT_IS_WINSOCKET 1 163# define EV_SELECT_IS_WINSOCKET 1
89# endif 164# endif
90#endif 165#endif
91 166
92/**/ 167/* this block tries to deduce configuration from header-defined symbols and defaults */
93 168
94#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
95# define EV_USE_MONOTONIC 1 171# 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
96#endif 187#endif
97 188
98#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
99# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
100# define EV_SELECT_USE_FD_SET 1
101#endif 191#endif
102 192
103#ifndef EV_USE_POLL 193#ifndef EV_USE_POLL
104# ifdef _WIN32 194# ifdef _WIN32
105# define EV_USE_POLL 0 195# define EV_USE_POLL 0
… …
107# define EV_USE_POLL 1 197# define EV_USE_POLL 1
108# endif 198# endif
109#endif 199#endif
110 200
111#ifndef EV_USE_EPOLL 201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
112# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
206# endif
113#endif 207#endif
114 208
115#ifndef EV_USE_KQUEUE 209#ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE 0 210# define EV_USE_KQUEUE 0
117#endif 211#endif
118 212
119#ifndef EV_USE_REALTIME 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))
120# define EV_USE_REALTIME 1 219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
121#endif 222# endif
223#endif
122 224
123/**/ 225#ifndef EV_PID_HASHSIZE
124 226# if EV_MINIMAL
125/* darwin simply cannot be helped */ 227# define EV_PID_HASHSIZE 1
126#ifdef __APPLE__ 228# else
127# undef EV_USE_POLL 229# define EV_PID_HASHSIZE 16
128# undef EV_USE_KQUEUE
129#endif 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 */
130 268
131#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
132# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
133# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
134#endif 272#endif
… …
136#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
137# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
138# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
139#endif 277#endif
140 278
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/utsname.h>
292# include <sys/inotify.h>
293/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294# ifndef IN_DONT_FOLLOW
295# undef EV_USE_INOTIFY
296# define EV_USE_INOTIFY 0
297# endif
298#endif
299
141#if EV_SELECT_IS_WINSOCKET 300#if EV_SELECT_IS_WINSOCKET
142# include <winsock.h> 301# include <winsock.h>
143#endif 302#endif
144 303
304#if EV_USE_EVENTFD
305/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306# include <stdint.h>
307# ifdef __cplusplus
308extern "C" {
309# endif
310int eventfd (unsigned int initval, int flags);
311# ifdef __cplusplus
312}
313# endif
314#endif
315
145/**/ 316/**/
146 317
318#if EV_VERIFY >= 3
319# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320#else
321# define EV_FREQUENT_CHECK do { } while (0)
322#endif
323
324/*
325 * This is used to avoid floating point rounding problems.
326 * It is added to ev_rt_now when scheduling periodics
327 * to ensure progress, time-wise, even when rounding
328 * errors are against us.
329 * This value is good at least till the year 4000.
330 * Better solutions welcome.
331 */
332#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
333
147#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 334#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
148#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 335#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
149#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
150/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 336/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
151 337
152#ifdef EV_H
153# include EV_H
154#else
155# include "ev.h"
156#endif
157
158#if __GNUC__ >= 3 338#if __GNUC__ >= 4
159# define expect(expr,value) __builtin_expect ((expr),(value)) 339# define expect(expr,value) __builtin_expect ((expr),(value))
160# define inline inline 340# define noinline __attribute__ ((noinline))
161#else 341#else
162# define expect(expr,value) (expr) 342# define expect(expr,value) (expr)
163# define inline static 343# define noinline
344# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345# define inline
346# endif
164#endif 347#endif
165 348
166#define expect_false(expr) expect ((expr) != 0, 0) 349#define expect_false(expr) expect ((expr) != 0, 0)
167#define expect_true(expr) expect ((expr) != 0, 1) 350#define expect_true(expr) expect ((expr) != 0, 1)
351#define inline_size static inline
352
353#if EV_MINIMAL
354# define inline_speed static noinline
355#else
356# define inline_speed static inline
357#endif
168 358
169#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 359#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
170#define ABSPRI(w) ((w)->priority - EV_MINPRI) 360#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
171 361
172#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 362#define EMPTY /* required for microsofts broken pseudo-c compiler */
173#define EMPTY2(a,b) /* used to suppress some warnings */ 363#define EMPTY2(a,b) /* used to suppress some warnings */
174 364
175typedef struct ev_watcher *W; 365typedef ev_watcher *W;
176typedef struct ev_watcher_list *WL; 366typedef ev_watcher_list *WL;
177typedef struct ev_watcher_time *WT; 367typedef ev_watcher_time *WT;
178 368
369#define ev_active(w) ((W)(w))->active
370#define ev_at(w) ((WT)(w))->at
371
372#if EV_USE_MONOTONIC
373/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374/* giving it a reasonably high chance of working on typical architetcures */
179static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 375static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376#endif
180 377
181#ifdef _WIN32 378#ifdef _WIN32
182# include "ev_win32.c" 379# include "ev_win32.c"
183#endif 380#endif
184 381
185/*****************************************************************************/ 382/*****************************************************************************/
186 383
187static void (*syserr_cb)(const char *msg); 384static void (*syserr_cb)(const char *msg);
188 385
386void
189void ev_set_syserr_cb (void (*cb)(const char *msg)) 387ev_set_syserr_cb (void (*cb)(const char *msg))
190{ 388{
191 syserr_cb = cb; 389 syserr_cb = cb;
192} 390}
193 391
194static void 392static void noinline
195syserr (const char *msg) 393syserr (const char *msg)
196{ 394{
197 if (!msg) 395 if (!msg)
198 msg = "(libev) system error"; 396 msg = "(libev) system error";
199 397
… …
204 perror (msg); 402 perror (msg);
205 abort (); 403 abort ();
206 } 404 }
207} 405}
208 406
407static void *
408ev_realloc_emul (void *ptr, long size)
409{
410 /* some systems, notably openbsd and darwin, fail to properly
411 * implement realloc (x, 0) (as required by both ansi c-98 and
412 * the single unix specification, so work around them here.
413 */
414
415 if (size)
416 return realloc (ptr, size);
417
418 free (ptr);
419 return 0;
420}
421
209static void *(*alloc)(void *ptr, long size); 422static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
210 423
424void
211void ev_set_allocator (void *(*cb)(void *ptr, long size)) 425ev_set_allocator (void *(*cb)(void *ptr, long size))
212{ 426{
213 alloc = cb; 427 alloc = cb;
214} 428}
215 429
216static void * 430inline_speed void *
217ev_realloc (void *ptr, long size) 431ev_realloc (void *ptr, long size)
218{ 432{
219 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 433 ptr = alloc (ptr, size);
220 434
221 if (!ptr && size) 435 if (!ptr && size)
222 { 436 {
223 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 437 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
224 abort (); 438 abort ();
… …
235typedef struct 449typedef struct
236{ 450{
237 WL head; 451 WL head;
238 unsigned char events; 452 unsigned char events;
239 unsigned char reify; 453 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char unused; /* currently unused padding */
240#if EV_SELECT_IS_WINSOCKET 456#if EV_SELECT_IS_WINSOCKET
241 SOCKET handle; 457 SOCKET handle;
242#endif 458#endif
243} ANFD; 459} ANFD;
244 460
245typedef struct 461typedef struct
246{ 462{
247 W w; 463 W w;
248 int events; 464 int events;
249} ANPENDING; 465} ANPENDING;
466
467#if EV_USE_INOTIFY
468/* hash table entry per inotify-id */
469typedef struct
470{
471 WL head;
472} ANFS;
473#endif
474
475/* Heap Entry */
476#if EV_HEAP_CACHE_AT
477 typedef struct {
478 ev_tstamp at;
479 WT w;
480 } ANHE;
481
482 #define ANHE_w(he) (he).w /* access watcher, read-write */
483 #define ANHE_at(he) (he).at /* access cached at, read-only */
484 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485#else
486 typedef WT ANHE;
487
488 #define ANHE_w(he) (he)
489 #define ANHE_at(he) (he)->at
490 #define ANHE_at_cache(he)
491#endif
250 492
251#if EV_MULTIPLICITY 493#if EV_MULTIPLICITY
252 494
253 struct ev_loop 495 struct ev_loop
254 { 496 {
… …
258 #include "ev_vars.h" 500 #include "ev_vars.h"
259 #undef VAR 501 #undef VAR
260 }; 502 };
261 #include "ev_wrap.h" 503 #include "ev_wrap.h"
262 504
263 struct ev_loop default_loop_struct; 505 static struct ev_loop default_loop_struct;
264 static struct ev_loop *default_loop; 506 struct ev_loop *ev_default_loop_ptr;
265 507
266#else 508#else
267 509
268 ev_tstamp ev_rt_now; 510 ev_tstamp ev_rt_now;
269 #define VAR(name,decl) static decl; 511 #define VAR(name,decl) static decl;
270 #include "ev_vars.h" 512 #include "ev_vars.h"
271 #undef VAR 513 #undef VAR
272 514
273 static int default_loop; 515 static int ev_default_loop_ptr;
274 516
275#endif 517#endif
276 518
277/*****************************************************************************/ 519/*****************************************************************************/
278 520
… …
288 gettimeofday (&tv, 0); 530 gettimeofday (&tv, 0);
289 return tv.tv_sec + tv.tv_usec * 1e-6; 531 return tv.tv_sec + tv.tv_usec * 1e-6;
290#endif 532#endif
291} 533}
292 534
293inline ev_tstamp 535ev_tstamp inline_size
294get_clock (void) 536get_clock (void)
295{ 537{
296#if EV_USE_MONOTONIC 538#if EV_USE_MONOTONIC
297 if (expect_true (have_monotonic)) 539 if (expect_true (have_monotonic))
298 { 540 {
… …
311{ 553{
312 return ev_rt_now; 554 return ev_rt_now;
313} 555}
314#endif 556#endif
315 557
316#define array_roundsize(type,n) (((n) | 4) & ~3) 558void
559ev_sleep (ev_tstamp delay)
560{
561 if (delay > 0.)
562 {
563#if EV_USE_NANOSLEEP
564 struct timespec ts;
565
566 ts.tv_sec = (time_t)delay;
567 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568
569 nanosleep (&ts, 0);
570#elif defined(_WIN32)
571 Sleep ((unsigned long)(delay * 1e3));
572#else
573 struct timeval tv;
574
575 tv.tv_sec = (time_t)delay;
576 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577
578 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579 /* somehting nto guaranteed by newer posix versions, but guaranteed */
580 /* by older ones */
581 select (0, 0, 0, 0, &tv);
582#endif
583 }
584}
585
586/*****************************************************************************/
587
588#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589
590int inline_size
591array_nextsize (int elem, int cur, int cnt)
592{
593 int ncur = cur + 1;
594
595 do
596 ncur <<= 1;
597 while (cnt > ncur);
598
599 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
601 {
602 ncur *= elem;
603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
604 ncur = ncur - sizeof (void *) * 4;
605 ncur /= elem;
606 }
607
608 return ncur;
609}
610
611static noinline void *
612array_realloc (int elem, void *base, int *cur, int cnt)
613{
614 *cur = array_nextsize (elem, *cur, cnt);
615 return ev_realloc (base, elem * *cur);
616}
617
618#define array_init_zero(base,count) \
619 memset ((void *)(base), 0, sizeof (*(base)) * (count))
317 620
318#define array_needsize(type,base,cur,cnt,init) \ 621#define array_needsize(type,base,cur,cnt,init) \
319 if (expect_false ((cnt) > cur)) \ 622 if (expect_false ((cnt) > (cur))) \
320 { \ 623 { \
321 int newcnt = cur; \ 624 int ocur_ = (cur); \
322 do \ 625 (base) = (type *)array_realloc \
323 { \ 626 (sizeof (type), (base), &(cur), (cnt)); \
324 newcnt = array_roundsize (type, newcnt << 1); \ 627 init ((base) + (ocur_), (cur) - ocur_); \
325 } \
326 while ((cnt) > newcnt); \
327 \
328 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
329 init (base + cur, newcnt - cur); \
330 cur = newcnt; \
331 } 628 }
332 629
630#if 0
333#define array_slim(type,stem) \ 631#define array_slim(type,stem) \
334 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 632 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
335 { \ 633 { \
336 stem ## max = array_roundsize (stem ## cnt >> 1); \ 634 stem ## max = array_roundsize (stem ## cnt >> 1); \
337 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 635 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
338 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 636 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
339 } 637 }
638#endif
340 639
341#define array_free(stem, idx) \ 640#define array_free(stem, idx) \
342 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 641 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
343 642
344/*****************************************************************************/ 643/*****************************************************************************/
345 644
346static void 645void noinline
347anfds_init (ANFD *base, int count)
348{
349 while (count--)
350 {
351 base->head = 0;
352 base->events = EV_NONE;
353 base->reify = 0;
354
355 ++base;
356 }
357}
358
359void
360ev_feed_event (EV_P_ void *w, int revents) 646ev_feed_event (EV_P_ void *w, int revents)
361{ 647{
362 W w_ = (W)w; 648 W w_ = (W)w;
649 int pri = ABSPRI (w_);
363 650
364 if (w_->pending) 651 if (expect_false (w_->pending))
652 pendings [pri][w_->pending - 1].events |= revents;
653 else
365 { 654 {
655 w_->pending = ++pendingcnt [pri];
656 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657 pendings [pri][w_->pending - 1].w = w_;
366 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 658 pendings [pri][w_->pending - 1].events = revents;
367 return;
368 } 659 }
369
370 w_->pending = ++pendingcnt [ABSPRI (w_)];
371 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
372 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
373 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
374} 660}
375 661
376static void 662void inline_speed
377queue_events (EV_P_ W *events, int eventcnt, int type) 663queue_events (EV_P_ W *events, int eventcnt, int type)
378{ 664{
379 int i; 665 int i;
380 666
381 for (i = 0; i < eventcnt; ++i) 667 for (i = 0; i < eventcnt; ++i)
382 ev_feed_event (EV_A_ events [i], type); 668 ev_feed_event (EV_A_ events [i], type);
383} 669}
384 670
385inline void 671/*****************************************************************************/
672
673void inline_speed
386fd_event (EV_P_ int fd, int revents) 674fd_event (EV_P_ int fd, int revents)
387{ 675{
388 ANFD *anfd = anfds + fd; 676 ANFD *anfd = anfds + fd;
389 struct ev_io *w; 677 ev_io *w;
390 678
391 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
392 { 680 {
393 int ev = w->events & revents; 681 int ev = w->events & revents;
394 682
395 if (ev) 683 if (ev)
396 ev_feed_event (EV_A_ (W)w, ev); 684 ev_feed_event (EV_A_ (W)w, ev);
… …
398} 686}
399 687
400void 688void
401ev_feed_fd_event (EV_P_ int fd, int revents) 689ev_feed_fd_event (EV_P_ int fd, int revents)
402{ 690{
691 if (fd >= 0 && fd < anfdmax)
403 fd_event (EV_A_ fd, revents); 692 fd_event (EV_A_ fd, revents);
404} 693}
405 694
406/*****************************************************************************/ 695void inline_size
407
408static void
409fd_reify (EV_P) 696fd_reify (EV_P)
410{ 697{
411 int i; 698 int i;
412 699
413 for (i = 0; i < fdchangecnt; ++i) 700 for (i = 0; i < fdchangecnt; ++i)
414 { 701 {
415 int fd = fdchanges [i]; 702 int fd = fdchanges [i];
416 ANFD *anfd = anfds + fd; 703 ANFD *anfd = anfds + fd;
417 struct ev_io *w; 704 ev_io *w;
418 705
419 int events = 0; 706 unsigned char events = 0;
420 707
421 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
422 events |= w->events; 709 events |= (unsigned char)w->events;
423 710
424#if EV_SELECT_IS_WINSOCKET 711#if EV_SELECT_IS_WINSOCKET
425 if (events) 712 if (events)
426 { 713 {
427 unsigned long argp; 714 unsigned long arg;
715 #ifdef EV_FD_TO_WIN32_HANDLE
716 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717 #else
428 anfd->handle = _get_osfhandle (fd); 718 anfd->handle = _get_osfhandle (fd);
719 #endif
429 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 720 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
430 } 721 }
431#endif 722#endif
432 723
724 {
725 unsigned char o_events = anfd->events;
726 unsigned char o_reify = anfd->reify;
727
433 anfd->reify = 0; 728 anfd->reify = 0;
434
435 method_modify (EV_A_ fd, anfd->events, events);
436 anfd->events = events; 729 anfd->events = events;
730
731 if (o_events != events || o_reify & EV_IOFDSET)
732 backend_modify (EV_A_ fd, o_events, events);
733 }
437 } 734 }
438 735
439 fdchangecnt = 0; 736 fdchangecnt = 0;
440} 737}
441 738
442static void 739void inline_size
443fd_change (EV_P_ int fd) 740fd_change (EV_P_ int fd, int flags)
444{ 741{
445 if (anfds [fd].reify) 742 unsigned char reify = anfds [fd].reify;
446 return;
447
448 anfds [fd].reify = 1; 743 anfds [fd].reify |= flags;
449 744
745 if (expect_true (!reify))
746 {
450 ++fdchangecnt; 747 ++fdchangecnt;
451 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
452 fdchanges [fdchangecnt - 1] = fd; 749 fdchanges [fdchangecnt - 1] = fd;
750 }
453} 751}
454 752
455static void 753void inline_speed
456fd_kill (EV_P_ int fd) 754fd_kill (EV_P_ int fd)
457{ 755{
458 struct ev_io *w; 756 ev_io *w;
459 757
460 while ((w = (struct ev_io *)anfds [fd].head)) 758 while ((w = (ev_io *)anfds [fd].head))
461 { 759 {
462 ev_io_stop (EV_A_ w); 760 ev_io_stop (EV_A_ w);
463 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
464 } 762 }
465} 763}
466 764
467static int 765int inline_size
468fd_valid (int fd) 766fd_valid (int fd)
469{ 767{
470#ifdef _WIN32 768#ifdef _WIN32
471 return _get_osfhandle (fd) != -1; 769 return _get_osfhandle (fd) != -1;
472#else 770#else
473 return fcntl (fd, F_GETFD) != -1; 771 return fcntl (fd, F_GETFD) != -1;
474#endif 772#endif
475} 773}
476 774
477/* called on EBADF to verify fds */ 775/* called on EBADF to verify fds */
478static void 776static void noinline
479fd_ebadf (EV_P) 777fd_ebadf (EV_P)
480{ 778{
481 int fd; 779 int fd;
482 780
483 for (fd = 0; fd < anfdmax; ++fd) 781 for (fd = 0; fd < anfdmax; ++fd)
484 if (anfds [fd].events) 782 if (anfds [fd].events)
485 if (!fd_valid (fd) == -1 && errno == EBADF) 783 if (!fd_valid (fd) && errno == EBADF)
486 fd_kill (EV_A_ fd); 784 fd_kill (EV_A_ fd);
487} 785}
488 786
489/* called on ENOMEM in select/poll to kill some fds and retry */ 787/* called on ENOMEM in select/poll to kill some fds and retry */
490static void 788static void noinline
491fd_enomem (EV_P) 789fd_enomem (EV_P)
492{ 790{
493 int fd; 791 int fd;
494 792
495 for (fd = anfdmax; fd--; ) 793 for (fd = anfdmax; fd--; )
… …
498 fd_kill (EV_A_ fd); 796 fd_kill (EV_A_ fd);
499 return; 797 return;
500 } 798 }
501} 799}
502 800
503/* usually called after fork if method needs to re-arm all fds from scratch */ 801/* usually called after fork if backend needs to re-arm all fds from scratch */
504static void 802static void noinline
505fd_rearm_all (EV_P) 803fd_rearm_all (EV_P)
506{ 804{
507 int fd; 805 int fd;
508 806
509 /* this should be highly optimised to not do anything but set a flag */
510 for (fd = 0; fd < anfdmax; ++fd) 807 for (fd = 0; fd < anfdmax; ++fd)
511 if (anfds [fd].events) 808 if (anfds [fd].events)
512 { 809 {
513 anfds [fd].events = 0; 810 anfds [fd].events = 0;
514 fd_change (EV_A_ fd); 811 fd_change (EV_A_ fd, EV_IOFDSET | 1);
515 } 812 }
516} 813}
517 814
518/*****************************************************************************/ 815/*****************************************************************************/
519 816
520static void 817/*
521upheap (WT *heap, int k) 818 * the heap functions want a real array index. array index 0 uis guaranteed to not
522{ 819 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
523 WT w = heap [k]; 820 * the branching factor of the d-tree.
821 */
524 822
525 while (k && heap [k >> 1]->at > w->at) 823/*
526 { 824 * at the moment we allow libev the luxury of two heaps,
527 heap [k] = heap [k >> 1]; 825 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
528 ((W)heap [k])->active = k + 1; 826 * which is more cache-efficient.
529 k >>= 1; 827 * the difference is about 5% with 50000+ watchers.
530 } 828 */
829#if EV_USE_4HEAP
531 830
532 heap [k] = w; 831#define DHEAP 4
533 ((W)heap [k])->active = k + 1; 832#define HEAP0 (DHEAP - 1) /* index of first element in heap */
833#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
834#define UPHEAP_DONE(p,k) ((p) == (k))
534 835
535} 836/* away from the root */
536 837void inline_speed
537static void
538downheap (WT *heap, int N, int k) 838downheap (ANHE *heap, int N, int k)
539{ 839{
540 WT w = heap [k]; 840 ANHE he = heap [k];
841 ANHE *E = heap + N + HEAP0;
541 842
542 while (k < (N >> 1)) 843 for (;;)
543 { 844 {
544 int j = k << 1; 845 ev_tstamp minat;
846 ANHE *minpos;
847 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
545 848
546 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 849 /* find minimum child */
850 if (expect_true (pos + DHEAP - 1 < E))
547 ++j; 851 {
548 852 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
549 if (w->at <= heap [j]->at) 853 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
856 }
857 else if (pos < E)
858 {
859 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
860 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
861 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
862 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
863 }
864 else
550 break; 865 break;
551 866
867 if (ANHE_at (he) <= minat)
868 break;
869
870 heap [k] = *minpos;
871 ev_active (ANHE_w (*minpos)) = k;
872
873 k = minpos - heap;
874 }
875
876 heap [k] = he;
877 ev_active (ANHE_w (he)) = k;
878}
879
880#else /* 4HEAP */
881
882#define HEAP0 1
883#define HPARENT(k) ((k) >> 1)
884#define UPHEAP_DONE(p,k) (!(p))
885
886/* away from the root */
887void inline_speed
888downheap (ANHE *heap, int N, int k)
889{
890 ANHE he = heap [k];
891
892 for (;;)
893 {
894 int c = k << 1;
895
896 if (c > N + HEAP0 - 1)
897 break;
898
899 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
900 ? 1 : 0;
901
902 if (ANHE_at (he) <= ANHE_at (heap [c]))
903 break;
904
552 heap [k] = heap [j]; 905 heap [k] = heap [c];
553 ((W)heap [k])->active = k + 1; 906 ev_active (ANHE_w (heap [k])) = k;
907
554 k = j; 908 k = c;
555 } 909 }
556 910
557 heap [k] = w; 911 heap [k] = he;
558 ((W)heap [k])->active = k + 1; 912 ev_active (ANHE_w (he)) = k;
559} 913}
914#endif
560 915
561inline void 916/* towards the root */
917void inline_speed
918upheap (ANHE *heap, int k)
919{
920 ANHE he = heap [k];
921
922 for (;;)
923 {
924 int p = HPARENT (k);
925
926 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
927 break;
928
929 heap [k] = heap [p];
930 ev_active (ANHE_w (heap [k])) = k;
931 k = p;
932 }
933
934 heap [k] = he;
935 ev_active (ANHE_w (he)) = k;
936}
937
938void inline_size
562adjustheap (WT *heap, int N, int k) 939adjustheap (ANHE *heap, int N, int k)
563{ 940{
941 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
564 upheap (heap, k); 942 upheap (heap, k);
943 else
565 downheap (heap, N, k); 944 downheap (heap, N, k);
945}
946
947/* rebuild the heap: this function is used only once and executed rarely */
948void inline_size
949reheap (ANHE *heap, int N)
950{
951 int i;
952
953 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
954 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
955 for (i = 0; i < N; ++i)
956 upheap (heap, i + HEAP0);
566} 957}
567 958
568/*****************************************************************************/ 959/*****************************************************************************/
569 960
570typedef struct 961typedef struct
571{ 962{
572 WL head; 963 WL head;
573 sig_atomic_t volatile gotsig; 964 EV_ATOMIC_T gotsig;
574} ANSIG; 965} ANSIG;
575 966
576static ANSIG *signals; 967static ANSIG *signals;
577static int signalmax; 968static int signalmax;
578 969
579static int sigpipe [2]; 970static EV_ATOMIC_T gotsig;
580static sig_atomic_t volatile gotsig;
581static struct ev_io sigev;
582 971
583static void 972/*****************************************************************************/
584signals_init (ANSIG *base, int count)
585{
586 while (count--)
587 {
588 base->head = 0;
589 base->gotsig = 0;
590 973
591 ++base; 974void inline_speed
592 }
593}
594
595static void
596sighandler (int signum)
597{
598#if _WIN32
599 signal (signum, sighandler);
600#endif
601
602 signals [signum - 1].gotsig = 1;
603
604 if (!gotsig)
605 {
606 int old_errno = errno;
607 gotsig = 1;
608 write (sigpipe [1], &signum, 1);
609 errno = old_errno;
610 }
611}
612
613void
614ev_feed_signal_event (EV_P_ int signum)
615{
616 WL w;
617
618#if EV_MULTIPLICITY
619 assert (("feeding signal events is only supported in the default loop", loop == default_loop));
620#endif
621
622 --signum;
623
624 if (signum < 0 || signum >= signalmax)
625 return;
626
627 signals [signum].gotsig = 0;
628
629 for (w = signals [signum].head; w; w = w->next)
630 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
631}
632
633static void
634sigcb (EV_P_ struct ev_io *iow, int revents)
635{
636 int signum;
637
638 read (sigpipe [0], &revents, 1);
639 gotsig = 0;
640
641 for (signum = signalmax; signum--; )
642 if (signals [signum].gotsig)
643 ev_feed_signal_event (EV_A_ signum + 1);
644}
645
646inline void
647fd_intern (int fd) 975fd_intern (int fd)
648{ 976{
649#ifdef _WIN32 977#ifdef _WIN32
650 int arg = 1; 978 unsigned long arg = 1;
651 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 979 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
652#else 980#else
653 fcntl (fd, F_SETFD, FD_CLOEXEC); 981 fcntl (fd, F_SETFD, FD_CLOEXEC);
654 fcntl (fd, F_SETFL, O_NONBLOCK); 982 fcntl (fd, F_SETFL, O_NONBLOCK);
655#endif 983#endif
656} 984}
657 985
986static void noinline
987evpipe_init (EV_P)
988{
989 if (!ev_is_active (&pipeev))
990 {
991#if EV_USE_EVENTFD
992 if ((evfd = eventfd (0, 0)) >= 0)
993 {
994 evpipe [0] = -1;
995 fd_intern (evfd);
996 ev_io_set (&pipeev, evfd, EV_READ);
997 }
998 else
999#endif
1000 {
1001 while (pipe (evpipe))
1002 syserr ("(libev) error creating signal/async pipe");
1003
1004 fd_intern (evpipe [0]);
1005 fd_intern (evpipe [1]);
1006 ev_io_set (&pipeev, evpipe [0], EV_READ);
1007 }
1008
1009 ev_io_start (EV_A_ &pipeev);
1010 ev_unref (EV_A); /* watcher should not keep loop alive */
1011 }
1012}
1013
1014void inline_size
1015evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1016{
1017 if (!*flag)
1018 {
1019 int old_errno = errno; /* save errno because write might clobber it */
1020
1021 *flag = 1;
1022
1023#if EV_USE_EVENTFD
1024 if (evfd >= 0)
1025 {
1026 uint64_t counter = 1;
1027 write (evfd, &counter, sizeof (uint64_t));
1028 }
1029 else
1030#endif
1031 write (evpipe [1], &old_errno, 1);
1032
1033 errno = old_errno;
1034 }
1035}
1036
658static void 1037static void
659siginit (EV_P) 1038pipecb (EV_P_ ev_io *iow, int revents)
660{ 1039{
661 fd_intern (sigpipe [0]); 1040#if EV_USE_EVENTFD
662 fd_intern (sigpipe [1]); 1041 if (evfd >= 0)
1042 {
1043 uint64_t counter;
1044 read (evfd, &counter, sizeof (uint64_t));
1045 }
1046 else
1047#endif
1048 {
1049 char dummy;
1050 read (evpipe [0], &dummy, 1);
1051 }
663 1052
664 ev_io_set (&sigev, sigpipe [0], EV_READ); 1053 if (gotsig && ev_is_default_loop (EV_A))
665 ev_io_start (EV_A_ &sigev); 1054 {
666 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1055 int signum;
1056 gotsig = 0;
1057
1058 for (signum = signalmax; signum--; )
1059 if (signals [signum].gotsig)
1060 ev_feed_signal_event (EV_A_ signum + 1);
1061 }
1062
1063#if EV_ASYNC_ENABLE
1064 if (gotasync)
1065 {
1066 int i;
1067 gotasync = 0;
1068
1069 for (i = asynccnt; i--; )
1070 if (asyncs [i]->sent)
1071 {
1072 asyncs [i]->sent = 0;
1073 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1074 }
1075 }
1076#endif
667} 1077}
668 1078
669/*****************************************************************************/ 1079/*****************************************************************************/
670 1080
671static struct ev_child *childs [PID_HASHSIZE]; 1081static void
1082ev_sighandler (int signum)
1083{
1084#if EV_MULTIPLICITY
1085 struct ev_loop *loop = &default_loop_struct;
1086#endif
1087
1088#if _WIN32
1089 signal (signum, ev_sighandler);
1090#endif
1091
1092 signals [signum - 1].gotsig = 1;
1093 evpipe_write (EV_A_ &gotsig);
1094}
1095
1096void noinline
1097ev_feed_signal_event (EV_P_ int signum)
1098{
1099 WL w;
1100
1101#if EV_MULTIPLICITY
1102 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1103#endif
1104
1105 --signum;
1106
1107 if (signum < 0 || signum >= signalmax)
1108 return;
1109
1110 signals [signum].gotsig = 0;
1111
1112 for (w = signals [signum].head; w; w = w->next)
1113 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1114}
1115
1116/*****************************************************************************/
1117
1118static WL childs [EV_PID_HASHSIZE];
672 1119
673#ifndef _WIN32 1120#ifndef _WIN32
674 1121
675static struct ev_signal childev; 1122static ev_signal childev;
1123
1124#ifndef WIFCONTINUED
1125# define WIFCONTINUED(status) 0
1126#endif
1127
1128void inline_speed
1129child_reap (EV_P_ int chain, int pid, int status)
1130{
1131 ev_child *w;
1132 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1133
1134 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1135 {
1136 if ((w->pid == pid || !w->pid)
1137 && (!traced || (w->flags & 1)))
1138 {
1139 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1140 w->rpid = pid;
1141 w->rstatus = status;
1142 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1143 }
1144 }
1145}
676 1146
677#ifndef WCONTINUED 1147#ifndef WCONTINUED
678# define WCONTINUED 0 1148# define WCONTINUED 0
679#endif 1149#endif
680 1150
681static void 1151static void
682child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
683{
684 struct ev_child *w;
685
686 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
687 if (w->pid == pid || !w->pid)
688 {
689 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
690 w->rpid = pid;
691 w->rstatus = status;
692 ev_feed_event (EV_A_ (W)w, EV_CHILD);
693 }
694}
695
696static void
697childcb (EV_P_ struct ev_signal *sw, int revents) 1152childcb (EV_P_ ev_signal *sw, int revents)
698{ 1153{
699 int pid, status; 1154 int pid, status;
700 1155
1156 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
701 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1157 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
702 { 1158 if (!WCONTINUED
1159 || errno != EINVAL
1160 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1161 return;
1162
703 /* make sure we are called again until all childs have been reaped */ 1163 /* make sure we are called again until all children have been reaped */
1164 /* we need to do it this way so that the callback gets called before we continue */
704 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1165 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
705 1166
706 child_reap (EV_A_ sw, pid, pid, status); 1167 child_reap (EV_A_ pid, pid, status);
1168 if (EV_PID_HASHSIZE > 1)
707 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1169 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
708 }
709} 1170}
710 1171
711#endif 1172#endif
712 1173
713/*****************************************************************************/ 1174/*****************************************************************************/
714 1175
1176#if EV_USE_PORT
1177# include "ev_port.c"
1178#endif
715#if EV_USE_KQUEUE 1179#if EV_USE_KQUEUE
716# include "ev_kqueue.c" 1180# include "ev_kqueue.c"
717#endif 1181#endif
718#if EV_USE_EPOLL 1182#if EV_USE_EPOLL
719# include "ev_epoll.c" 1183# include "ev_epoll.c"
… …
736{ 1200{
737 return EV_VERSION_MINOR; 1201 return EV_VERSION_MINOR;
738} 1202}
739 1203
740/* return true if we are running with elevated privileges and should ignore env variables */ 1204/* return true if we are running with elevated privileges and should ignore env variables */
741static int 1205int inline_size
742enable_secure (void) 1206enable_secure (void)
743{ 1207{
744#ifdef _WIN32 1208#ifdef _WIN32
745 return 0; 1209 return 0;
746#else 1210#else
… …
748 || getgid () != getegid (); 1212 || getgid () != getegid ();
749#endif 1213#endif
750} 1214}
751 1215
752unsigned int 1216unsigned int
753ev_method (EV_P) 1217ev_supported_backends (void)
754{ 1218{
755 return method; 1219 unsigned int flags = 0;
756}
757 1220
758static void 1221 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1222 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1223 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1224 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1225 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1226
1227 return flags;
1228}
1229
1230unsigned int
1231ev_recommended_backends (void)
1232{
1233 unsigned int flags = ev_supported_backends ();
1234
1235#ifndef __NetBSD__
1236 /* kqueue is borked on everything but netbsd apparently */
1237 /* it usually doesn't work correctly on anything but sockets and pipes */
1238 flags &= ~EVBACKEND_KQUEUE;
1239#endif
1240#ifdef __APPLE__
1241 // flags &= ~EVBACKEND_KQUEUE; for documentation
1242 flags &= ~EVBACKEND_POLL;
1243#endif
1244
1245 return flags;
1246}
1247
1248unsigned int
1249ev_embeddable_backends (void)
1250{
1251 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1252
1253 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1254 /* please fix it and tell me how to detect the fix */
1255 flags &= ~EVBACKEND_EPOLL;
1256
1257 return flags;
1258}
1259
1260unsigned int
1261ev_backend (EV_P)
1262{
1263 return backend;
1264}
1265
1266unsigned int
1267ev_loop_count (EV_P)
1268{
1269 return loop_count;
1270}
1271
1272void
1273ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1274{
1275 io_blocktime = interval;
1276}
1277
1278void
1279ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1280{
1281 timeout_blocktime = interval;
1282}
1283
1284static void noinline
759loop_init (EV_P_ unsigned int flags) 1285loop_init (EV_P_ unsigned int flags)
760{ 1286{
761 if (!method) 1287 if (!backend)
762 { 1288 {
763#if EV_USE_MONOTONIC 1289#if EV_USE_MONOTONIC
764 { 1290 {
765 struct timespec ts; 1291 struct timespec ts;
766 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1292 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
767 have_monotonic = 1; 1293 have_monotonic = 1;
768 } 1294 }
769#endif 1295#endif
770 1296
771 ev_rt_now = ev_time (); 1297 ev_rt_now = ev_time ();
772 mn_now = get_clock (); 1298 mn_now = get_clock ();
773 now_floor = mn_now; 1299 now_floor = mn_now;
774 rtmn_diff = ev_rt_now - mn_now; 1300 rtmn_diff = ev_rt_now - mn_now;
775 1301
776 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 1302 io_blocktime = 0.;
1303 timeout_blocktime = 0.;
1304 backend = 0;
1305 backend_fd = -1;
1306 gotasync = 0;
1307#if EV_USE_INOTIFY
1308 fs_fd = -2;
1309#endif
1310
1311 /* pid check not overridable via env */
1312#ifndef _WIN32
1313 if (flags & EVFLAG_FORKCHECK)
1314 curpid = getpid ();
1315#endif
1316
1317 if (!(flags & EVFLAG_NOENV)
1318 && !enable_secure ()
1319 && getenv ("LIBEV_FLAGS"))
777 flags = atoi (getenv ("LIBEV_FLAGS")); 1320 flags = atoi (getenv ("LIBEV_FLAGS"));
778 1321
779 if (!(flags & 0x0000ffff)) 1322 if (!(flags & 0x0000ffffU))
780 flags |= 0x0000ffff; 1323 flags |= ev_recommended_backends ();
781 1324
782 method = 0; 1325#if EV_USE_PORT
1326 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1327#endif
783#if EV_USE_KQUEUE 1328#if EV_USE_KQUEUE
784 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); 1329 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
785#endif 1330#endif
786#if EV_USE_EPOLL 1331#if EV_USE_EPOLL
787 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); 1332 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
788#endif 1333#endif
789#if EV_USE_POLL 1334#if EV_USE_POLL
790 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); 1335 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
791#endif 1336#endif
792#if EV_USE_SELECT 1337#if EV_USE_SELECT
793 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); 1338 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
794#endif 1339#endif
795 1340
796 ev_init (&sigev, sigcb); 1341 ev_init (&pipeev, pipecb);
797 ev_set_priority (&sigev, EV_MAXPRI); 1342 ev_set_priority (&pipeev, EV_MAXPRI);
798 } 1343 }
799} 1344}
800 1345
801void 1346static void noinline
802loop_destroy (EV_P) 1347loop_destroy (EV_P)
803{ 1348{
804 int i; 1349 int i;
805 1350
1351 if (ev_is_active (&pipeev))
1352 {
1353 ev_ref (EV_A); /* signal watcher */
1354 ev_io_stop (EV_A_ &pipeev);
1355
1356#if EV_USE_EVENTFD
1357 if (evfd >= 0)
1358 close (evfd);
1359#endif
1360
1361 if (evpipe [0] >= 0)
1362 {
1363 close (evpipe [0]);
1364 close (evpipe [1]);
1365 }
1366 }
1367
1368#if EV_USE_INOTIFY
1369 if (fs_fd >= 0)
1370 close (fs_fd);
1371#endif
1372
1373 if (backend_fd >= 0)
1374 close (backend_fd);
1375
1376#if EV_USE_PORT
1377 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1378#endif
806#if EV_USE_KQUEUE 1379#if EV_USE_KQUEUE
807 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1380 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
808#endif 1381#endif
809#if EV_USE_EPOLL 1382#if EV_USE_EPOLL
810 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1383 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
811#endif 1384#endif
812#if EV_USE_POLL 1385#if EV_USE_POLL
813 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1386 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
814#endif 1387#endif
815#if EV_USE_SELECT 1388#if EV_USE_SELECT
816 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1389 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
817#endif 1390#endif
818 1391
819 for (i = NUMPRI; i--; ) 1392 for (i = NUMPRI; i--; )
1393 {
820 array_free (pending, [i]); 1394 array_free (pending, [i]);
1395#if EV_IDLE_ENABLE
1396 array_free (idle, [i]);
1397#endif
1398 }
1399
1400 ev_free (anfds); anfdmax = 0;
821 1401
822 /* have to use the microsoft-never-gets-it-right macro */ 1402 /* have to use the microsoft-never-gets-it-right macro */
823 array_free (fdchange, EMPTY0); 1403 array_free (fdchange, EMPTY);
824 array_free (timer, EMPTY0); 1404 array_free (timer, EMPTY);
825#if EV_PERIODICS 1405#if EV_PERIODIC_ENABLE
826 array_free (periodic, EMPTY0); 1406 array_free (periodic, EMPTY);
827#endif 1407#endif
1408#if EV_FORK_ENABLE
828 array_free (idle, EMPTY0); 1409 array_free (fork, EMPTY);
1410#endif
829 array_free (prepare, EMPTY0); 1411 array_free (prepare, EMPTY);
830 array_free (check, EMPTY0); 1412 array_free (check, EMPTY);
1413#if EV_ASYNC_ENABLE
1414 array_free (async, EMPTY);
1415#endif
831 1416
832 method = 0; 1417 backend = 0;
833} 1418}
834 1419
835static void 1420#if EV_USE_INOTIFY
1421void inline_size infy_fork (EV_P);
1422#endif
1423
1424void inline_size
836loop_fork (EV_P) 1425loop_fork (EV_P)
837{ 1426{
1427#if EV_USE_PORT
1428 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1429#endif
1430#if EV_USE_KQUEUE
1431 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1432#endif
838#if EV_USE_EPOLL 1433#if EV_USE_EPOLL
839 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1434 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
840#endif 1435#endif
841#if EV_USE_KQUEUE 1436#if EV_USE_INOTIFY
842 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1437 infy_fork (EV_A);
843#endif 1438#endif
844 1439
845 if (ev_is_active (&sigev)) 1440 if (ev_is_active (&pipeev))
846 { 1441 {
847 /* default loop */ 1442 /* this "locks" the handlers against writing to the pipe */
1443 /* while we modify the fd vars */
1444 gotsig = 1;
1445#if EV_ASYNC_ENABLE
1446 gotasync = 1;
1447#endif
848 1448
849 ev_ref (EV_A); 1449 ev_ref (EV_A);
850 ev_io_stop (EV_A_ &sigev); 1450 ev_io_stop (EV_A_ &pipeev);
1451
1452#if EV_USE_EVENTFD
1453 if (evfd >= 0)
1454 close (evfd);
1455#endif
1456
1457 if (evpipe [0] >= 0)
1458 {
851 close (sigpipe [0]); 1459 close (evpipe [0]);
852 close (sigpipe [1]); 1460 close (evpipe [1]);
1461 }
853 1462
854 while (pipe (sigpipe))
855 syserr ("(libev) error creating pipe");
856
857 siginit (EV_A); 1463 evpipe_init (EV_A);
1464 /* now iterate over everything, in case we missed something */
1465 pipecb (EV_A_ &pipeev, EV_READ);
858 } 1466 }
859 1467
860 postfork = 0; 1468 postfork = 0;
861} 1469}
1470
1471#if EV_MULTIPLICITY
1472
1473struct ev_loop *
1474ev_loop_new (unsigned int flags)
1475{
1476 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1477
1478 memset (loop, 0, sizeof (struct ev_loop));
1479
1480 loop_init (EV_A_ flags);
1481
1482 if (ev_backend (EV_A))
1483 return loop;
1484
1485 return 0;
1486}
1487
1488void
1489ev_loop_destroy (EV_P)
1490{
1491 loop_destroy (EV_A);
1492 ev_free (loop);
1493}
1494
1495void
1496ev_loop_fork (EV_P)
1497{
1498 postfork = 1; /* must be in line with ev_default_fork */
1499}
1500
1501#if EV_VERIFY
1502static void noinline
1503verify_watcher (EV_P_ W w)
1504{
1505 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1506
1507 if (w->pending)
1508 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1509}
1510
1511static void noinline
1512verify_heap (EV_P_ ANHE *heap, int N)
1513{
1514 int i;
1515
1516 for (i = HEAP0; i < N + HEAP0; ++i)
1517 {
1518 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1519 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1520 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1521
1522 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1523 }
1524}
1525
1526static void noinline
1527array_verify (EV_P_ W *ws, int cnt)
1528{
1529 while (cnt--)
1530 {
1531 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1532 verify_watcher (EV_A_ ws [cnt]);
1533 }
1534}
1535#endif
1536
1537void
1538ev_loop_verify (EV_P)
1539{
1540#if EV_VERIFY
1541 int i;
1542 WL w;
1543
1544 assert (activecnt >= -1);
1545
1546 assert (fdchangemax >= fdchangecnt);
1547 for (i = 0; i < fdchangecnt; ++i)
1548 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1549
1550 assert (anfdmax >= 0);
1551 for (i = 0; i < anfdmax; ++i)
1552 for (w = anfds [i].head; w; w = w->next)
1553 {
1554 verify_watcher (EV_A_ (W)w);
1555 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1556 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1557 }
1558
1559 assert (timermax >= timercnt);
1560 verify_heap (EV_A_ timers, timercnt);
1561
1562#if EV_PERIODIC_ENABLE
1563 assert (periodicmax >= periodiccnt);
1564 verify_heap (EV_A_ periodics, periodiccnt);
1565#endif
1566
1567 for (i = NUMPRI; i--; )
1568 {
1569 assert (pendingmax [i] >= pendingcnt [i]);
1570#if EV_IDLE_ENABLE
1571 assert (idleall >= 0);
1572 assert (idlemax [i] >= idlecnt [i]);
1573 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1574#endif
1575 }
1576
1577#if EV_FORK_ENABLE
1578 assert (forkmax >= forkcnt);
1579 array_verify (EV_A_ (W *)forks, forkcnt);
1580#endif
1581
1582#if EV_ASYNC_ENABLE
1583 assert (asyncmax >= asynccnt);
1584 array_verify (EV_A_ (W *)asyncs, asynccnt);
1585#endif
1586
1587 assert (preparemax >= preparecnt);
1588 array_verify (EV_A_ (W *)prepares, preparecnt);
1589
1590 assert (checkmax >= checkcnt);
1591 array_verify (EV_A_ (W *)checks, checkcnt);
1592
1593# if 0
1594 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1595 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1596# endif
1597#endif
1598}
1599
1600#endif /* multiplicity */
862 1601
863#if EV_MULTIPLICITY 1602#if EV_MULTIPLICITY
864struct ev_loop * 1603struct ev_loop *
865ev_loop_new (unsigned int flags) 1604ev_default_loop_init (unsigned int flags)
866{
867 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
868
869 memset (loop, 0, sizeof (struct ev_loop));
870
871 loop_init (EV_A_ flags);
872
873 if (ev_method (EV_A))
874 return loop;
875
876 return 0;
877}
878
879void
880ev_loop_destroy (EV_P)
881{
882 loop_destroy (EV_A);
883 ev_free (loop);
884}
885
886void
887ev_loop_fork (EV_P)
888{
889 postfork = 1;
890}
891
892#endif
893
894#if EV_MULTIPLICITY
895struct ev_loop *
896#else 1605#else
897int 1606int
898#endif
899ev_default_loop (unsigned int flags) 1607ev_default_loop (unsigned int flags)
1608#endif
900{ 1609{
901 if (sigpipe [0] == sigpipe [1])
902 if (pipe (sigpipe))
903 return 0;
904
905 if (!default_loop) 1610 if (!ev_default_loop_ptr)
906 { 1611 {
907#if EV_MULTIPLICITY 1612#if EV_MULTIPLICITY
908 struct ev_loop *loop = default_loop = &default_loop_struct; 1613 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
909#else 1614#else
910 default_loop = 1; 1615 ev_default_loop_ptr = 1;
911#endif 1616#endif
912 1617
913 loop_init (EV_A_ flags); 1618 loop_init (EV_A_ flags);
914 1619
915 if (ev_method (EV_A)) 1620 if (ev_backend (EV_A))
916 { 1621 {
917 siginit (EV_A);
918
919#ifndef _WIN32 1622#ifndef _WIN32
920 ev_signal_init (&childev, childcb, SIGCHLD); 1623 ev_signal_init (&childev, childcb, SIGCHLD);
921 ev_set_priority (&childev, EV_MAXPRI); 1624 ev_set_priority (&childev, EV_MAXPRI);
922 ev_signal_start (EV_A_ &childev); 1625 ev_signal_start (EV_A_ &childev);
923 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1626 ev_unref (EV_A); /* child watcher should not keep loop alive */
924#endif 1627#endif
925 } 1628 }
926 else 1629 else
927 default_loop = 0; 1630 ev_default_loop_ptr = 0;
928 } 1631 }
929 1632
930 return default_loop; 1633 return ev_default_loop_ptr;
931} 1634}
932 1635
933void 1636void
934ev_default_destroy (void) 1637ev_default_destroy (void)
935{ 1638{
936#if EV_MULTIPLICITY 1639#if EV_MULTIPLICITY
937 struct ev_loop *loop = default_loop; 1640 struct ev_loop *loop = ev_default_loop_ptr;
938#endif 1641#endif
1642
1643 ev_default_loop_ptr = 0;
939 1644
940#ifndef _WIN32 1645#ifndef _WIN32
941 ev_ref (EV_A); /* child watcher */ 1646 ev_ref (EV_A); /* child watcher */
942 ev_signal_stop (EV_A_ &childev); 1647 ev_signal_stop (EV_A_ &childev);
943#endif 1648#endif
944 1649
945 ev_ref (EV_A); /* signal watcher */
946 ev_io_stop (EV_A_ &sigev);
947
948 close (sigpipe [0]); sigpipe [0] = 0;
949 close (sigpipe [1]); sigpipe [1] = 0;
950
951 loop_destroy (EV_A); 1650 loop_destroy (EV_A);
952} 1651}
953 1652
954void 1653void
955ev_default_fork (void) 1654ev_default_fork (void)
956{ 1655{
957#if EV_MULTIPLICITY 1656#if EV_MULTIPLICITY
958 struct ev_loop *loop = default_loop; 1657 struct ev_loop *loop = ev_default_loop_ptr;
959#endif 1658#endif
960 1659
961 if (method) 1660 if (backend)
962 postfork = 1; 1661 postfork = 1; /* must be in line with ev_loop_fork */
963} 1662}
964 1663
965/*****************************************************************************/ 1664/*****************************************************************************/
966 1665
967static int 1666void
968any_pending (EV_P) 1667ev_invoke (EV_P_ void *w, int revents)
969{ 1668{
970 int pri; 1669 EV_CB_INVOKE ((W)w, revents);
971
972 for (pri = NUMPRI; pri--; )
973 if (pendingcnt [pri])
974 return 1;
975
976 return 0;
977} 1670}
978 1671
979static void 1672void inline_speed
980call_pending (EV_P) 1673call_pending (EV_P)
981{ 1674{
982 int pri; 1675 int pri;
983 1676
984 for (pri = NUMPRI; pri--; ) 1677 for (pri = NUMPRI; pri--; )
985 while (pendingcnt [pri]) 1678 while (pendingcnt [pri])
986 { 1679 {
987 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1680 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
988 1681
989 if (p->w) 1682 if (expect_true (p->w))
990 { 1683 {
1684 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1685
991 p->w->pending = 0; 1686 p->w->pending = 0;
992 EV_CB_INVOKE (p->w, p->events); 1687 EV_CB_INVOKE (p->w, p->events);
1688 EV_FREQUENT_CHECK;
993 } 1689 }
994 } 1690 }
995} 1691}
996 1692
997static void 1693#if EV_IDLE_ENABLE
1694void inline_size
1695idle_reify (EV_P)
1696{
1697 if (expect_false (idleall))
1698 {
1699 int pri;
1700
1701 for (pri = NUMPRI; pri--; )
1702 {
1703 if (pendingcnt [pri])
1704 break;
1705
1706 if (idlecnt [pri])
1707 {
1708 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1709 break;
1710 }
1711 }
1712 }
1713}
1714#endif
1715
1716void inline_size
998timers_reify (EV_P) 1717timers_reify (EV_P)
999{ 1718{
1719 EV_FREQUENT_CHECK;
1720
1000 while (timercnt && ((WT)timers [0])->at <= mn_now) 1721 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1001 { 1722 {
1002 struct ev_timer *w = timers [0]; 1723 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1003 1724
1004 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1725 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1005 1726
1006 /* first reschedule or stop timer */ 1727 /* first reschedule or stop timer */
1007 if (w->repeat) 1728 if (w->repeat)
1008 { 1729 {
1730 ev_at (w) += w->repeat;
1731 if (ev_at (w) < mn_now)
1732 ev_at (w) = mn_now;
1733
1009 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1734 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1010 1735
1011 ((WT)w)->at += w->repeat; 1736 ANHE_at_cache (timers [HEAP0]);
1012 if (((WT)w)->at < mn_now)
1013 ((WT)w)->at = mn_now;
1014
1015 downheap ((WT *)timers, timercnt, 0); 1737 downheap (timers, timercnt, HEAP0);
1016 } 1738 }
1017 else 1739 else
1018 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1740 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1019 1741
1742 EV_FREQUENT_CHECK;
1020 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1743 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1021 } 1744 }
1022} 1745}
1023 1746
1024#if EV_PERIODICS 1747#if EV_PERIODIC_ENABLE
1025static void 1748void inline_size
1026periodics_reify (EV_P) 1749periodics_reify (EV_P)
1027{ 1750{
1751 EV_FREQUENT_CHECK;
1752
1028 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1753 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1029 { 1754 {
1030 struct ev_periodic *w = periodics [0]; 1755 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1031 1756
1032 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1757 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1033 1758
1034 /* first reschedule or stop timer */ 1759 /* first reschedule or stop timer */
1035 if (w->reschedule_cb) 1760 if (w->reschedule_cb)
1036 { 1761 {
1037 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1762 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1763
1038 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1764 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1765
1766 ANHE_at_cache (periodics [HEAP0]);
1039 downheap ((WT *)periodics, periodiccnt, 0); 1767 downheap (periodics, periodiccnt, HEAP0);
1040 } 1768 }
1041 else if (w->interval) 1769 else if (w->interval)
1042 { 1770 {
1043 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1771 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1044 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1772 /* if next trigger time is not sufficiently in the future, put it there */
1773 /* this might happen because of floating point inexactness */
1774 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1775 {
1776 ev_at (w) += w->interval;
1777
1778 /* if interval is unreasonably low we might still have a time in the past */
1779 /* so correct this. this will make the periodic very inexact, but the user */
1780 /* has effectively asked to get triggered more often than possible */
1781 if (ev_at (w) < ev_rt_now)
1782 ev_at (w) = ev_rt_now;
1783 }
1784
1785 ANHE_at_cache (periodics [HEAP0]);
1045 downheap ((WT *)periodics, periodiccnt, 0); 1786 downheap (periodics, periodiccnt, HEAP0);
1046 } 1787 }
1047 else 1788 else
1048 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1789 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1049 1790
1791 EV_FREQUENT_CHECK;
1050 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1792 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1051 } 1793 }
1052} 1794}
1053 1795
1054static void 1796static void noinline
1055periodics_reschedule (EV_P) 1797periodics_reschedule (EV_P)
1056{ 1798{
1057 int i; 1799 int i;
1058 1800
1059 /* adjust periodics after time jump */ 1801 /* adjust periodics after time jump */
1060 for (i = 0; i < periodiccnt; ++i) 1802 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1061 { 1803 {
1062 struct ev_periodic *w = periodics [i]; 1804 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1063 1805
1064 if (w->reschedule_cb) 1806 if (w->reschedule_cb)
1065 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1807 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1066 else if (w->interval) 1808 else if (w->interval)
1067 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1809 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1810
1811 ANHE_at_cache (periodics [i]);
1812 }
1813
1814 reheap (periodics, periodiccnt);
1815}
1816#endif
1817
1818void inline_speed
1819time_update (EV_P_ ev_tstamp max_block)
1820{
1821 int i;
1822
1823#if EV_USE_MONOTONIC
1824 if (expect_true (have_monotonic))
1068 } 1825 {
1826 ev_tstamp odiff = rtmn_diff;
1069 1827
1070 /* now rebuild the heap */
1071 for (i = periodiccnt >> 1; i--; )
1072 downheap ((WT *)periodics, periodiccnt, i);
1073}
1074#endif
1075
1076inline int
1077time_update_monotonic (EV_P)
1078{
1079 mn_now = get_clock (); 1828 mn_now = get_clock ();
1080 1829
1830 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1831 /* interpolate in the meantime */
1081 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1832 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1082 { 1833 {
1083 ev_rt_now = rtmn_diff + mn_now; 1834 ev_rt_now = rtmn_diff + mn_now;
1084 return 0; 1835 return;
1085 } 1836 }
1086 else 1837
1087 {
1088 now_floor = mn_now; 1838 now_floor = mn_now;
1089 ev_rt_now = ev_time (); 1839 ev_rt_now = ev_time ();
1090 return 1;
1091 }
1092}
1093 1840
1094static void 1841 /* loop a few times, before making important decisions.
1095time_update (EV_P) 1842 * on the choice of "4": one iteration isn't enough,
1096{ 1843 * in case we get preempted during the calls to
1097 int i; 1844 * ev_time and get_clock. a second call is almost guaranteed
1098 1845 * to succeed in that case, though. and looping a few more times
1099#if EV_USE_MONOTONIC 1846 * doesn't hurt either as we only do this on time-jumps or
1100 if (expect_true (have_monotonic)) 1847 * in the unlikely event of having been preempted here.
1101 { 1848 */
1102 if (time_update_monotonic (EV_A)) 1849 for (i = 4; --i; )
1103 { 1850 {
1104 ev_tstamp odiff = rtmn_diff; 1851 rtmn_diff = ev_rt_now - mn_now;
1105 1852
1106 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1853 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1854 return; /* all is well */
1855
1856 ev_rt_now = ev_time ();
1857 mn_now = get_clock ();
1858 now_floor = mn_now;
1859 }
1860
1861# if EV_PERIODIC_ENABLE
1862 periodics_reschedule (EV_A);
1863# endif
1864 /* no timer adjustment, as the monotonic clock doesn't jump */
1865 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1866 }
1867 else
1868#endif
1869 {
1870 ev_rt_now = ev_time ();
1871
1872 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1873 {
1874#if EV_PERIODIC_ENABLE
1875 periodics_reschedule (EV_A);
1876#endif
1877 /* adjust timers. this is easy, as the offset is the same for all of them */
1878 for (i = 0; i < timercnt; ++i)
1107 { 1879 {
1108 rtmn_diff = ev_rt_now - mn_now; 1880 ANHE *he = timers + i + HEAP0;
1109 1881 ANHE_w (*he)->at += ev_rt_now - mn_now;
1110 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1882 ANHE_at_cache (*he);
1111 return; /* all is well */
1112
1113 ev_rt_now = ev_time ();
1114 mn_now = get_clock ();
1115 now_floor = mn_now;
1116 } 1883 }
1117
1118# if EV_PERIODICS
1119 periodics_reschedule (EV_A);
1120# endif
1121 /* no timer adjustment, as the monotonic clock doesn't jump */
1122 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1123 } 1884 }
1124 }
1125 else
1126#endif
1127 {
1128 ev_rt_now = ev_time ();
1129
1130 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1131 {
1132#if EV_PERIODICS
1133 periodics_reschedule (EV_A);
1134#endif
1135
1136 /* adjust timers. this is easy, as the offset is the same for all */
1137 for (i = 0; i < timercnt; ++i)
1138 ((WT)timers [i])->at += ev_rt_now - mn_now;
1139 }
1140 1885
1141 mn_now = ev_rt_now; 1886 mn_now = ev_rt_now;
1142 } 1887 }
1143} 1888}
1144 1889
… …
1152ev_unref (EV_P) 1897ev_unref (EV_P)
1153{ 1898{
1154 --activecnt; 1899 --activecnt;
1155} 1900}
1156 1901
1902void
1903ev_now_update (EV_P)
1904{
1905 time_update (EV_A_ 1e100);
1906}
1907
1157static int loop_done; 1908static int loop_done;
1158 1909
1159void 1910void
1160ev_loop (EV_P_ int flags) 1911ev_loop (EV_P_ int flags)
1161{ 1912{
1162 double block; 1913 loop_done = EVUNLOOP_CANCEL;
1163 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1164 1914
1165 while (activecnt) 1915 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1916
1917 do
1166 { 1918 {
1919#if EV_VERIFY >= 2
1920 ev_loop_verify (EV_A);
1921#endif
1922
1923#ifndef _WIN32
1924 if (expect_false (curpid)) /* penalise the forking check even more */
1925 if (expect_false (getpid () != curpid))
1926 {
1927 curpid = getpid ();
1928 postfork = 1;
1929 }
1930#endif
1931
1932#if EV_FORK_ENABLE
1933 /* we might have forked, so queue fork handlers */
1934 if (expect_false (postfork))
1935 if (forkcnt)
1936 {
1937 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1938 call_pending (EV_A);
1939 }
1940#endif
1941
1167 /* queue check watchers (and execute them) */ 1942 /* queue prepare watchers (and execute them) */
1168 if (expect_false (preparecnt)) 1943 if (expect_false (preparecnt))
1169 { 1944 {
1170 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1945 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1171 call_pending (EV_A); 1946 call_pending (EV_A);
1172 } 1947 }
1173 1948
1949 if (expect_false (!activecnt))
1950 break;
1951
1174 /* we might have forked, so reify kernel state if necessary */ 1952 /* we might have forked, so reify kernel state if necessary */
1175 if (expect_false (postfork)) 1953 if (expect_false (postfork))
1176 loop_fork (EV_A); 1954 loop_fork (EV_A);
1177 1955
1178 /* update fd-related kernel structures */ 1956 /* update fd-related kernel structures */
1179 fd_reify (EV_A); 1957 fd_reify (EV_A);
1180 1958
1181 /* calculate blocking time */ 1959 /* calculate blocking time */
1960 {
1961 ev_tstamp waittime = 0.;
1962 ev_tstamp sleeptime = 0.;
1182 1963
1183 /* we only need this for !monotonic clock or timers, but as we basically 1964 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1184 always have timers, we just calculate it always */
1185#if EV_USE_MONOTONIC
1186 if (expect_true (have_monotonic))
1187 time_update_monotonic (EV_A);
1188 else
1189#endif
1190 { 1965 {
1191 ev_rt_now = ev_time (); 1966 /* update time to cancel out callback processing overhead */
1192 mn_now = ev_rt_now; 1967 time_update (EV_A_ 1e100);
1193 }
1194 1968
1195 if (flags & EVLOOP_NONBLOCK || idlecnt)
1196 block = 0.;
1197 else
1198 {
1199 block = MAX_BLOCKTIME; 1969 waittime = MAX_BLOCKTIME;
1200 1970
1201 if (timercnt) 1971 if (timercnt)
1202 { 1972 {
1203 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1973 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1204 if (block > to) block = to; 1974 if (waittime > to) waittime = to;
1205 } 1975 }
1206 1976
1207#if EV_PERIODICS 1977#if EV_PERIODIC_ENABLE
1208 if (periodiccnt) 1978 if (periodiccnt)
1209 { 1979 {
1210 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1980 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1211 if (block > to) block = to; 1981 if (waittime > to) waittime = to;
1212 } 1982 }
1213#endif 1983#endif
1214 1984
1215 if (block < 0.) block = 0.; 1985 if (expect_false (waittime < timeout_blocktime))
1986 waittime = timeout_blocktime;
1987
1988 sleeptime = waittime - backend_fudge;
1989
1990 if (expect_true (sleeptime > io_blocktime))
1991 sleeptime = io_blocktime;
1992
1993 if (sleeptime)
1994 {
1995 ev_sleep (sleeptime);
1996 waittime -= sleeptime;
1997 }
1216 } 1998 }
1217 1999
1218 method_poll (EV_A_ block); 2000 ++loop_count;
2001 backend_poll (EV_A_ waittime);
1219 2002
1220 /* update ev_rt_now, do magic */ 2003 /* update ev_rt_now, do magic */
1221 time_update (EV_A); 2004 time_update (EV_A_ waittime + sleeptime);
2005 }
1222 2006
1223 /* queue pending timers and reschedule them */ 2007 /* queue pending timers and reschedule them */
1224 timers_reify (EV_A); /* relative timers called last */ 2008 timers_reify (EV_A); /* relative timers called last */
1225#if EV_PERIODICS 2009#if EV_PERIODIC_ENABLE
1226 periodics_reify (EV_A); /* absolute timers called first */ 2010 periodics_reify (EV_A); /* absolute timers called first */
1227#endif 2011#endif
1228 2012
2013#if EV_IDLE_ENABLE
1229 /* queue idle watchers unless io or timers are pending */ 2014 /* queue idle watchers unless other events are pending */
1230 if (idlecnt && !any_pending (EV_A)) 2015 idle_reify (EV_A);
1231 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2016#endif
1232 2017
1233 /* queue check watchers, to be executed first */ 2018 /* queue check watchers, to be executed first */
1234 if (checkcnt) 2019 if (expect_false (checkcnt))
1235 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2020 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1236 2021
1237 call_pending (EV_A); 2022 call_pending (EV_A);
1238
1239 if (loop_done)
1240 break;
1241 } 2023 }
2024 while (expect_true (
2025 activecnt
2026 && !loop_done
2027 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2028 ));
1242 2029
1243 if (loop_done != 2) 2030 if (loop_done == EVUNLOOP_ONE)
1244 loop_done = 0; 2031 loop_done = EVUNLOOP_CANCEL;
1245} 2032}
1246 2033
1247void 2034void
1248ev_unloop (EV_P_ int how) 2035ev_unloop (EV_P_ int how)
1249{ 2036{
1250 loop_done = how; 2037 loop_done = how;
1251} 2038}
1252 2039
1253/*****************************************************************************/ 2040/*****************************************************************************/
1254 2041
1255inline void 2042void inline_size
1256wlist_add (WL *head, WL elem) 2043wlist_add (WL *head, WL elem)
1257{ 2044{
1258 elem->next = *head; 2045 elem->next = *head;
1259 *head = elem; 2046 *head = elem;
1260} 2047}
1261 2048
1262inline void 2049void inline_size
1263wlist_del (WL *head, WL elem) 2050wlist_del (WL *head, WL elem)
1264{ 2051{
1265 while (*head) 2052 while (*head)
1266 { 2053 {
1267 if (*head == elem) 2054 if (*head == elem)
… …
1272 2059
1273 head = &(*head)->next; 2060 head = &(*head)->next;
1274 } 2061 }
1275} 2062}
1276 2063
1277inline void 2064void inline_speed
1278ev_clear_pending (EV_P_ W w) 2065clear_pending (EV_P_ W w)
1279{ 2066{
1280 if (w->pending) 2067 if (w->pending)
1281 { 2068 {
1282 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2069 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1283 w->pending = 0; 2070 w->pending = 0;
1284 } 2071 }
1285} 2072}
1286 2073
1287inline void 2074int
2075ev_clear_pending (EV_P_ void *w)
2076{
2077 W w_ = (W)w;
2078 int pending = w_->pending;
2079
2080 if (expect_true (pending))
2081 {
2082 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2083 w_->pending = 0;
2084 p->w = 0;
2085 return p->events;
2086 }
2087 else
2088 return 0;
2089}
2090
2091void inline_size
2092pri_adjust (EV_P_ W w)
2093{
2094 int pri = w->priority;
2095 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2096 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2097 w->priority = pri;
2098}
2099
2100void inline_speed
1288ev_start (EV_P_ W w, int active) 2101ev_start (EV_P_ W w, int active)
1289{ 2102{
1290 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2103 pri_adjust (EV_A_ w);
1291 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1292
1293 w->active = active; 2104 w->active = active;
1294 ev_ref (EV_A); 2105 ev_ref (EV_A);
1295} 2106}
1296 2107
1297inline void 2108void inline_size
1298ev_stop (EV_P_ W w) 2109ev_stop (EV_P_ W w)
1299{ 2110{
1300 ev_unref (EV_A); 2111 ev_unref (EV_A);
1301 w->active = 0; 2112 w->active = 0;
1302} 2113}
1303 2114
1304/*****************************************************************************/ 2115/*****************************************************************************/
1305 2116
1306void 2117void noinline
1307ev_io_start (EV_P_ struct ev_io *w) 2118ev_io_start (EV_P_ ev_io *w)
1308{ 2119{
1309 int fd = w->fd; 2120 int fd = w->fd;
1310 2121
1311 if (ev_is_active (w)) 2122 if (expect_false (ev_is_active (w)))
1312 return; 2123 return;
1313 2124
1314 assert (("ev_io_start called with negative fd", fd >= 0)); 2125 assert (("ev_io_start called with negative fd", fd >= 0));
2126 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2127
2128 EV_FREQUENT_CHECK;
1315 2129
1316 ev_start (EV_A_ (W)w, 1); 2130 ev_start (EV_A_ (W)w, 1);
1317 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2131 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1318 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2132 wlist_add (&anfds[fd].head, (WL)w);
1319 2133
1320 fd_change (EV_A_ fd); 2134 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1321} 2135 w->events &= ~EV_IOFDSET;
1322 2136
1323void 2137 EV_FREQUENT_CHECK;
2138}
2139
2140void noinline
1324ev_io_stop (EV_P_ struct ev_io *w) 2141ev_io_stop (EV_P_ ev_io *w)
1325{ 2142{
1326 ev_clear_pending (EV_A_ (W)w); 2143 clear_pending (EV_A_ (W)w);
1327 if (!ev_is_active (w)) 2144 if (expect_false (!ev_is_active (w)))
1328 return; 2145 return;
1329 2146
1330 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2147 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1331 2148
2149 EV_FREQUENT_CHECK;
2150
1332 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2151 wlist_del (&anfds[w->fd].head, (WL)w);
1333 ev_stop (EV_A_ (W)w); 2152 ev_stop (EV_A_ (W)w);
1334 2153
1335 fd_change (EV_A_ w->fd); 2154 fd_change (EV_A_ w->fd, 1);
1336}
1337 2155
1338void 2156 EV_FREQUENT_CHECK;
2157}
2158
2159void noinline
1339ev_timer_start (EV_P_ struct ev_timer *w) 2160ev_timer_start (EV_P_ ev_timer *w)
1340{ 2161{
1341 if (ev_is_active (w)) 2162 if (expect_false (ev_is_active (w)))
1342 return; 2163 return;
1343 2164
1344 ((WT)w)->at += mn_now; 2165 ev_at (w) += mn_now;
1345 2166
1346 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2167 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1347 2168
2169 EV_FREQUENT_CHECK;
2170
2171 ++timercnt;
1348 ev_start (EV_A_ (W)w, ++timercnt); 2172 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1349 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 2173 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1350 timers [timercnt - 1] = w; 2174 ANHE_w (timers [ev_active (w)]) = (WT)w;
1351 upheap ((WT *)timers, timercnt - 1); 2175 ANHE_at_cache (timers [ev_active (w)]);
2176 upheap (timers, ev_active (w));
1352 2177
2178 EV_FREQUENT_CHECK;
2179
1353 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2180 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1354} 2181}
1355 2182
1356void 2183void noinline
1357ev_timer_stop (EV_P_ struct ev_timer *w) 2184ev_timer_stop (EV_P_ ev_timer *w)
1358{ 2185{
1359 ev_clear_pending (EV_A_ (W)w); 2186 clear_pending (EV_A_ (W)w);
1360 if (!ev_is_active (w)) 2187 if (expect_false (!ev_is_active (w)))
1361 return; 2188 return;
1362 2189
2190 EV_FREQUENT_CHECK;
2191
2192 {
2193 int active = ev_active (w);
2194
1363 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2195 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1364 2196
1365 if (((W)w)->active < timercnt--) 2197 --timercnt;
2198
2199 if (expect_true (active < timercnt + HEAP0))
1366 { 2200 {
1367 timers [((W)w)->active - 1] = timers [timercnt]; 2201 timers [active] = timers [timercnt + HEAP0];
1368 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2202 adjustheap (timers, timercnt, active);
1369 } 2203 }
2204 }
1370 2205
1371 ((WT)w)->at -= mn_now; 2206 EV_FREQUENT_CHECK;
2207
2208 ev_at (w) -= mn_now;
1372 2209
1373 ev_stop (EV_A_ (W)w); 2210 ev_stop (EV_A_ (W)w);
1374} 2211}
1375 2212
1376void 2213void noinline
1377ev_timer_again (EV_P_ struct ev_timer *w) 2214ev_timer_again (EV_P_ ev_timer *w)
1378{ 2215{
2216 EV_FREQUENT_CHECK;
2217
1379 if (ev_is_active (w)) 2218 if (ev_is_active (w))
1380 { 2219 {
1381 if (w->repeat) 2220 if (w->repeat)
1382 { 2221 {
1383 ((WT)w)->at = mn_now + w->repeat; 2222 ev_at (w) = mn_now + w->repeat;
2223 ANHE_at_cache (timers [ev_active (w)]);
1384 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2224 adjustheap (timers, timercnt, ev_active (w));
1385 } 2225 }
1386 else 2226 else
1387 ev_timer_stop (EV_A_ w); 2227 ev_timer_stop (EV_A_ w);
1388 } 2228 }
1389 else if (w->repeat) 2229 else if (w->repeat)
1390 { 2230 {
1391 w->at = w->repeat; 2231 ev_at (w) = w->repeat;
1392 ev_timer_start (EV_A_ w); 2232 ev_timer_start (EV_A_ w);
1393 } 2233 }
1394}
1395 2234
2235 EV_FREQUENT_CHECK;
2236}
2237
1396#if EV_PERIODICS 2238#if EV_PERIODIC_ENABLE
1397void 2239void noinline
1398ev_periodic_start (EV_P_ struct ev_periodic *w) 2240ev_periodic_start (EV_P_ ev_periodic *w)
1399{ 2241{
1400 if (ev_is_active (w)) 2242 if (expect_false (ev_is_active (w)))
1401 return; 2243 return;
1402 2244
1403 if (w->reschedule_cb) 2245 if (w->reschedule_cb)
1404 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2246 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1405 else if (w->interval) 2247 else if (w->interval)
1406 { 2248 {
1407 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2249 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1408 /* this formula differs from the one in periodic_reify because we do not always round up */ 2250 /* this formula differs from the one in periodic_reify because we do not always round up */
1409 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2251 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1410 } 2252 }
2253 else
2254 ev_at (w) = w->offset;
1411 2255
2256 EV_FREQUENT_CHECK;
2257
2258 ++periodiccnt;
1412 ev_start (EV_A_ (W)w, ++periodiccnt); 2259 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1413 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2260 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1414 periodics [periodiccnt - 1] = w; 2261 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1415 upheap ((WT *)periodics, periodiccnt - 1); 2262 ANHE_at_cache (periodics [ev_active (w)]);
2263 upheap (periodics, ev_active (w));
1416 2264
2265 EV_FREQUENT_CHECK;
2266
1417 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2267 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1418} 2268}
1419 2269
1420void 2270void noinline
1421ev_periodic_stop (EV_P_ struct ev_periodic *w) 2271ev_periodic_stop (EV_P_ ev_periodic *w)
1422{ 2272{
1423 ev_clear_pending (EV_A_ (W)w); 2273 clear_pending (EV_A_ (W)w);
1424 if (!ev_is_active (w)) 2274 if (expect_false (!ev_is_active (w)))
1425 return; 2275 return;
1426 2276
2277 EV_FREQUENT_CHECK;
2278
2279 {
2280 int active = ev_active (w);
2281
1427 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2282 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1428 2283
1429 if (((W)w)->active < periodiccnt--) 2284 --periodiccnt;
2285
2286 if (expect_true (active < periodiccnt + HEAP0))
1430 { 2287 {
1431 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2288 periodics [active] = periodics [periodiccnt + HEAP0];
1432 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2289 adjustheap (periodics, periodiccnt, active);
1433 } 2290 }
2291 }
2292
2293 EV_FREQUENT_CHECK;
1434 2294
1435 ev_stop (EV_A_ (W)w); 2295 ev_stop (EV_A_ (W)w);
1436} 2296}
1437 2297
1438void 2298void noinline
1439ev_periodic_again (EV_P_ struct ev_periodic *w) 2299ev_periodic_again (EV_P_ ev_periodic *w)
1440{ 2300{
1441 /* TODO: use adjustheap and recalculation */ 2301 /* TODO: use adjustheap and recalculation */
1442 ev_periodic_stop (EV_A_ w); 2302 ev_periodic_stop (EV_A_ w);
1443 ev_periodic_start (EV_A_ w); 2303 ev_periodic_start (EV_A_ w);
1444} 2304}
1445#endif 2305#endif
1446 2306
1447void
1448ev_idle_start (EV_P_ struct ev_idle *w)
1449{
1450 if (ev_is_active (w))
1451 return;
1452
1453 ev_start (EV_A_ (W)w, ++idlecnt);
1454 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1455 idles [idlecnt - 1] = w;
1456}
1457
1458void
1459ev_idle_stop (EV_P_ struct ev_idle *w)
1460{
1461 ev_clear_pending (EV_A_ (W)w);
1462 if (!ev_is_active (w))
1463 return;
1464
1465 idles [((W)w)->active - 1] = idles [--idlecnt];
1466 ev_stop (EV_A_ (W)w);
1467}
1468
1469void
1470ev_prepare_start (EV_P_ struct ev_prepare *w)
1471{
1472 if (ev_is_active (w))
1473 return;
1474
1475 ev_start (EV_A_ (W)w, ++preparecnt);
1476 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1477 prepares [preparecnt - 1] = w;
1478}
1479
1480void
1481ev_prepare_stop (EV_P_ struct ev_prepare *w)
1482{
1483 ev_clear_pending (EV_A_ (W)w);
1484 if (!ev_is_active (w))
1485 return;
1486
1487 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1488 ev_stop (EV_A_ (W)w);
1489}
1490
1491void
1492ev_check_start (EV_P_ struct ev_check *w)
1493{
1494 if (ev_is_active (w))
1495 return;
1496
1497 ev_start (EV_A_ (W)w, ++checkcnt);
1498 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1499 checks [checkcnt - 1] = w;
1500}
1501
1502void
1503ev_check_stop (EV_P_ struct ev_check *w)
1504{
1505 ev_clear_pending (EV_A_ (W)w);
1506 if (!ev_is_active (w))
1507 return;
1508
1509 checks [((W)w)->active - 1] = checks [--checkcnt];
1510 ev_stop (EV_A_ (W)w);
1511}
1512
1513#ifndef SA_RESTART 2307#ifndef SA_RESTART
1514# define SA_RESTART 0 2308# define SA_RESTART 0
1515#endif 2309#endif
1516 2310
1517void 2311void noinline
1518ev_signal_start (EV_P_ struct ev_signal *w) 2312ev_signal_start (EV_P_ ev_signal *w)
1519{ 2313{
1520#if EV_MULTIPLICITY 2314#if EV_MULTIPLICITY
1521 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2315 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1522#endif 2316#endif
1523 if (ev_is_active (w)) 2317 if (expect_false (ev_is_active (w)))
1524 return; 2318 return;
1525 2319
1526 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2320 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1527 2321
2322 evpipe_init (EV_A);
2323
2324 EV_FREQUENT_CHECK;
2325
2326 {
2327#ifndef _WIN32
2328 sigset_t full, prev;
2329 sigfillset (&full);
2330 sigprocmask (SIG_SETMASK, &full, &prev);
2331#endif
2332
2333 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2334
2335#ifndef _WIN32
2336 sigprocmask (SIG_SETMASK, &prev, 0);
2337#endif
2338 }
2339
1528 ev_start (EV_A_ (W)w, 1); 2340 ev_start (EV_A_ (W)w, 1);
1529 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1530 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2341 wlist_add (&signals [w->signum - 1].head, (WL)w);
1531 2342
1532 if (!((WL)w)->next) 2343 if (!((WL)w)->next)
1533 { 2344 {
1534#if _WIN32 2345#if _WIN32
1535 signal (w->signum, sighandler); 2346 signal (w->signum, ev_sighandler);
1536#else 2347#else
1537 struct sigaction sa; 2348 struct sigaction sa;
1538 sa.sa_handler = sighandler; 2349 sa.sa_handler = ev_sighandler;
1539 sigfillset (&sa.sa_mask); 2350 sigfillset (&sa.sa_mask);
1540 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2351 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1541 sigaction (w->signum, &sa, 0); 2352 sigaction (w->signum, &sa, 0);
1542#endif 2353#endif
1543 } 2354 }
1544}
1545 2355
1546void 2356 EV_FREQUENT_CHECK;
2357}
2358
2359void noinline
1547ev_signal_stop (EV_P_ struct ev_signal *w) 2360ev_signal_stop (EV_P_ ev_signal *w)
1548{ 2361{
1549 ev_clear_pending (EV_A_ (W)w); 2362 clear_pending (EV_A_ (W)w);
1550 if (!ev_is_active (w)) 2363 if (expect_false (!ev_is_active (w)))
1551 return; 2364 return;
1552 2365
2366 EV_FREQUENT_CHECK;
2367
1553 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2368 wlist_del (&signals [w->signum - 1].head, (WL)w);
1554 ev_stop (EV_A_ (W)w); 2369 ev_stop (EV_A_ (W)w);
1555 2370
1556 if (!signals [w->signum - 1].head) 2371 if (!signals [w->signum - 1].head)
1557 signal (w->signum, SIG_DFL); 2372 signal (w->signum, SIG_DFL);
1558}
1559 2373
2374 EV_FREQUENT_CHECK;
2375}
2376
1560void 2377void
1561ev_child_start (EV_P_ struct ev_child *w) 2378ev_child_start (EV_P_ ev_child *w)
1562{ 2379{
1563#if EV_MULTIPLICITY 2380#if EV_MULTIPLICITY
1564 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2381 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1565#endif 2382#endif
1566 if (ev_is_active (w)) 2383 if (expect_false (ev_is_active (w)))
1567 return; 2384 return;
1568 2385
2386 EV_FREQUENT_CHECK;
2387
1569 ev_start (EV_A_ (W)w, 1); 2388 ev_start (EV_A_ (W)w, 1);
1570 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2389 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1571}
1572 2390
2391 EV_FREQUENT_CHECK;
2392}
2393
1573void 2394void
1574ev_child_stop (EV_P_ struct ev_child *w) 2395ev_child_stop (EV_P_ ev_child *w)
1575{ 2396{
1576 ev_clear_pending (EV_A_ (W)w); 2397 clear_pending (EV_A_ (W)w);
1577 if (!ev_is_active (w)) 2398 if (expect_false (!ev_is_active (w)))
1578 return; 2399 return;
1579 2400
2401 EV_FREQUENT_CHECK;
2402
1580 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2403 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1581 ev_stop (EV_A_ (W)w); 2404 ev_stop (EV_A_ (W)w);
2405
2406 EV_FREQUENT_CHECK;
1582} 2407}
2408
2409#if EV_STAT_ENABLE
2410
2411# ifdef _WIN32
2412# undef lstat
2413# define lstat(a,b) _stati64 (a,b)
2414# endif
2415
2416#define DEF_STAT_INTERVAL 5.0074891
2417#define MIN_STAT_INTERVAL 0.1074891
2418
2419static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2420
2421#if EV_USE_INOTIFY
2422# define EV_INOTIFY_BUFSIZE 8192
2423
2424static void noinline
2425infy_add (EV_P_ ev_stat *w)
2426{
2427 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);
2428
2429 if (w->wd < 0)
2430 {
2431 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2432
2433 /* monitor some parent directory for speedup hints */
2434 /* note that exceeding the hardcoded limit is not a correctness issue, */
2435 /* but an efficiency issue only */
2436 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2437 {
2438 char path [4096];
2439 strcpy (path, w->path);
2440
2441 do
2442 {
2443 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2444 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2445
2446 char *pend = strrchr (path, '/');
2447
2448 if (!pend)
2449 break; /* whoops, no '/', complain to your admin */
2450
2451 *pend = 0;
2452 w->wd = inotify_add_watch (fs_fd, path, mask);
2453 }
2454 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2455 }
2456 }
2457 else
2458 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2459
2460 if (w->wd >= 0)
2461 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2462}
2463
2464static void noinline
2465infy_del (EV_P_ ev_stat *w)
2466{
2467 int slot;
2468 int wd = w->wd;
2469
2470 if (wd < 0)
2471 return;
2472
2473 w->wd = -2;
2474 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2475 wlist_del (&fs_hash [slot].head, (WL)w);
2476
2477 /* remove this watcher, if others are watching it, they will rearm */
2478 inotify_rm_watch (fs_fd, wd);
2479}
2480
2481static void noinline
2482infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2483{
2484 if (slot < 0)
2485 /* overflow, need to check for all hash slots */
2486 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2487 infy_wd (EV_A_ slot, wd, ev);
2488 else
2489 {
2490 WL w_;
2491
2492 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2493 {
2494 ev_stat *w = (ev_stat *)w_;
2495 w_ = w_->next; /* lets us remove this watcher and all before it */
2496
2497 if (w->wd == wd || wd == -1)
2498 {
2499 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2500 {
2501 w->wd = -1;
2502 infy_add (EV_A_ w); /* re-add, no matter what */
2503 }
2504
2505 stat_timer_cb (EV_A_ &w->timer, 0);
2506 }
2507 }
2508 }
2509}
2510
2511static void
2512infy_cb (EV_P_ ev_io *w, int revents)
2513{
2514 char buf [EV_INOTIFY_BUFSIZE];
2515 struct inotify_event *ev = (struct inotify_event *)buf;
2516 int ofs;
2517 int len = read (fs_fd, buf, sizeof (buf));
2518
2519 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2520 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2521}
2522
2523void inline_size
2524infy_init (EV_P)
2525{
2526 if (fs_fd != -2)
2527 return;
2528
2529 /* kernels < 2.6.25 are borked
2530 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2531 */
2532 {
2533 struct utsname buf;
2534 int major, minor, micro;
2535
2536 fs_fd = -1;
2537
2538 if (uname (&buf))
2539 return;
2540
2541 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2542 return;
2543
2544 if (major < 2
2545 || (major == 2 && minor < 6)
2546 || (major == 2 && minor == 6 && micro < 25))
2547 return;
2548 }
2549
2550 fs_fd = inotify_init ();
2551
2552 if (fs_fd >= 0)
2553 {
2554 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2555 ev_set_priority (&fs_w, EV_MAXPRI);
2556 ev_io_start (EV_A_ &fs_w);
2557 }
2558}
2559
2560void inline_size
2561infy_fork (EV_P)
2562{
2563 int slot;
2564
2565 if (fs_fd < 0)
2566 return;
2567
2568 close (fs_fd);
2569 fs_fd = inotify_init ();
2570
2571 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2572 {
2573 WL w_ = fs_hash [slot].head;
2574 fs_hash [slot].head = 0;
2575
2576 while (w_)
2577 {
2578 ev_stat *w = (ev_stat *)w_;
2579 w_ = w_->next; /* lets us add this watcher */
2580
2581 w->wd = -1;
2582
2583 if (fs_fd >= 0)
2584 infy_add (EV_A_ w); /* re-add, no matter what */
2585 else
2586 ev_timer_start (EV_A_ &w->timer);
2587 }
2588 }
2589}
2590
2591#endif
2592
2593#ifdef _WIN32
2594# define EV_LSTAT(p,b) _stati64 (p, b)
2595#else
2596# define EV_LSTAT(p,b) lstat (p, b)
2597#endif
2598
2599void
2600ev_stat_stat (EV_P_ ev_stat *w)
2601{
2602 if (lstat (w->path, &w->attr) < 0)
2603 w->attr.st_nlink = 0;
2604 else if (!w->attr.st_nlink)
2605 w->attr.st_nlink = 1;
2606}
2607
2608static void noinline
2609stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2610{
2611 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2612
2613 /* we copy this here each the time so that */
2614 /* prev has the old value when the callback gets invoked */
2615 w->prev = w->attr;
2616 ev_stat_stat (EV_A_ w);
2617
2618 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2619 if (
2620 w->prev.st_dev != w->attr.st_dev
2621 || w->prev.st_ino != w->attr.st_ino
2622 || w->prev.st_mode != w->attr.st_mode
2623 || w->prev.st_nlink != w->attr.st_nlink
2624 || w->prev.st_uid != w->attr.st_uid
2625 || w->prev.st_gid != w->attr.st_gid
2626 || w->prev.st_rdev != w->attr.st_rdev
2627 || w->prev.st_size != w->attr.st_size
2628 || w->prev.st_atime != w->attr.st_atime
2629 || w->prev.st_mtime != w->attr.st_mtime
2630 || w->prev.st_ctime != w->attr.st_ctime
2631 ) {
2632 #if EV_USE_INOTIFY
2633 if (fs_fd >= 0)
2634 {
2635 infy_del (EV_A_ w);
2636 infy_add (EV_A_ w);
2637 ev_stat_stat (EV_A_ w); /* avoid race... */
2638 }
2639 #endif
2640
2641 ev_feed_event (EV_A_ w, EV_STAT);
2642 }
2643}
2644
2645void
2646ev_stat_start (EV_P_ ev_stat *w)
2647{
2648 if (expect_false (ev_is_active (w)))
2649 return;
2650
2651 /* since we use memcmp, we need to clear any padding data etc. */
2652 memset (&w->prev, 0, sizeof (ev_statdata));
2653 memset (&w->attr, 0, sizeof (ev_statdata));
2654
2655 ev_stat_stat (EV_A_ w);
2656
2657 if (w->interval < MIN_STAT_INTERVAL)
2658 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2659
2660 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2661 ev_set_priority (&w->timer, ev_priority (w));
2662
2663#if EV_USE_INOTIFY
2664 infy_init (EV_A);
2665
2666 if (fs_fd >= 0)
2667 infy_add (EV_A_ w);
2668 else
2669#endif
2670 ev_timer_start (EV_A_ &w->timer);
2671
2672 ev_start (EV_A_ (W)w, 1);
2673
2674 EV_FREQUENT_CHECK;
2675}
2676
2677void
2678ev_stat_stop (EV_P_ ev_stat *w)
2679{
2680 clear_pending (EV_A_ (W)w);
2681 if (expect_false (!ev_is_active (w)))
2682 return;
2683
2684 EV_FREQUENT_CHECK;
2685
2686#if EV_USE_INOTIFY
2687 infy_del (EV_A_ w);
2688#endif
2689 ev_timer_stop (EV_A_ &w->timer);
2690
2691 ev_stop (EV_A_ (W)w);
2692
2693 EV_FREQUENT_CHECK;
2694}
2695#endif
2696
2697#if EV_IDLE_ENABLE
2698void
2699ev_idle_start (EV_P_ ev_idle *w)
2700{
2701 if (expect_false (ev_is_active (w)))
2702 return;
2703
2704 pri_adjust (EV_A_ (W)w);
2705
2706 EV_FREQUENT_CHECK;
2707
2708 {
2709 int active = ++idlecnt [ABSPRI (w)];
2710
2711 ++idleall;
2712 ev_start (EV_A_ (W)w, active);
2713
2714 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2715 idles [ABSPRI (w)][active - 1] = w;
2716 }
2717
2718 EV_FREQUENT_CHECK;
2719}
2720
2721void
2722ev_idle_stop (EV_P_ ev_idle *w)
2723{
2724 clear_pending (EV_A_ (W)w);
2725 if (expect_false (!ev_is_active (w)))
2726 return;
2727
2728 EV_FREQUENT_CHECK;
2729
2730 {
2731 int active = ev_active (w);
2732
2733 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2734 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2735
2736 ev_stop (EV_A_ (W)w);
2737 --idleall;
2738 }
2739
2740 EV_FREQUENT_CHECK;
2741}
2742#endif
2743
2744void
2745ev_prepare_start (EV_P_ ev_prepare *w)
2746{
2747 if (expect_false (ev_is_active (w)))
2748 return;
2749
2750 EV_FREQUENT_CHECK;
2751
2752 ev_start (EV_A_ (W)w, ++preparecnt);
2753 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2754 prepares [preparecnt - 1] = w;
2755
2756 EV_FREQUENT_CHECK;
2757}
2758
2759void
2760ev_prepare_stop (EV_P_ ev_prepare *w)
2761{
2762 clear_pending (EV_A_ (W)w);
2763 if (expect_false (!ev_is_active (w)))
2764 return;
2765
2766 EV_FREQUENT_CHECK;
2767
2768 {
2769 int active = ev_active (w);
2770
2771 prepares [active - 1] = prepares [--preparecnt];
2772 ev_active (prepares [active - 1]) = active;
2773 }
2774
2775 ev_stop (EV_A_ (W)w);
2776
2777 EV_FREQUENT_CHECK;
2778}
2779
2780void
2781ev_check_start (EV_P_ ev_check *w)
2782{
2783 if (expect_false (ev_is_active (w)))
2784 return;
2785
2786 EV_FREQUENT_CHECK;
2787
2788 ev_start (EV_A_ (W)w, ++checkcnt);
2789 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2790 checks [checkcnt - 1] = w;
2791
2792 EV_FREQUENT_CHECK;
2793}
2794
2795void
2796ev_check_stop (EV_P_ ev_check *w)
2797{
2798 clear_pending (EV_A_ (W)w);
2799 if (expect_false (!ev_is_active (w)))
2800 return;
2801
2802 EV_FREQUENT_CHECK;
2803
2804 {
2805 int active = ev_active (w);
2806
2807 checks [active - 1] = checks [--checkcnt];
2808 ev_active (checks [active - 1]) = active;
2809 }
2810
2811 ev_stop (EV_A_ (W)w);
2812
2813 EV_FREQUENT_CHECK;
2814}
2815
2816#if EV_EMBED_ENABLE
2817void noinline
2818ev_embed_sweep (EV_P_ ev_embed *w)
2819{
2820 ev_loop (w->other, EVLOOP_NONBLOCK);
2821}
2822
2823static void
2824embed_io_cb (EV_P_ ev_io *io, int revents)
2825{
2826 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2827
2828 if (ev_cb (w))
2829 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2830 else
2831 ev_loop (w->other, EVLOOP_NONBLOCK);
2832}
2833
2834static void
2835embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2836{
2837 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2838
2839 {
2840 struct ev_loop *loop = w->other;
2841
2842 while (fdchangecnt)
2843 {
2844 fd_reify (EV_A);
2845 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2846 }
2847 }
2848}
2849
2850static void
2851embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2852{
2853 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2854
2855 {
2856 struct ev_loop *loop = w->other;
2857
2858 ev_loop_fork (EV_A);
2859 }
2860}
2861
2862#if 0
2863static void
2864embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2865{
2866 ev_idle_stop (EV_A_ idle);
2867}
2868#endif
2869
2870void
2871ev_embed_start (EV_P_ ev_embed *w)
2872{
2873 if (expect_false (ev_is_active (w)))
2874 return;
2875
2876 {
2877 struct ev_loop *loop = w->other;
2878 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2879 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2880 }
2881
2882 EV_FREQUENT_CHECK;
2883
2884 ev_set_priority (&w->io, ev_priority (w));
2885 ev_io_start (EV_A_ &w->io);
2886
2887 ev_prepare_init (&w->prepare, embed_prepare_cb);
2888 ev_set_priority (&w->prepare, EV_MINPRI);
2889 ev_prepare_start (EV_A_ &w->prepare);
2890
2891 ev_fork_init (&w->fork, embed_fork_cb);
2892 ev_fork_start (EV_A_ &w->fork);
2893
2894 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2895
2896 ev_start (EV_A_ (W)w, 1);
2897
2898 EV_FREQUENT_CHECK;
2899}
2900
2901void
2902ev_embed_stop (EV_P_ ev_embed *w)
2903{
2904 clear_pending (EV_A_ (W)w);
2905 if (expect_false (!ev_is_active (w)))
2906 return;
2907
2908 EV_FREQUENT_CHECK;
2909
2910 ev_io_stop (EV_A_ &w->io);
2911 ev_prepare_stop (EV_A_ &w->prepare);
2912 ev_fork_stop (EV_A_ &w->fork);
2913
2914 EV_FREQUENT_CHECK;
2915}
2916#endif
2917
2918#if EV_FORK_ENABLE
2919void
2920ev_fork_start (EV_P_ ev_fork *w)
2921{
2922 if (expect_false (ev_is_active (w)))
2923 return;
2924
2925 EV_FREQUENT_CHECK;
2926
2927 ev_start (EV_A_ (W)w, ++forkcnt);
2928 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2929 forks [forkcnt - 1] = w;
2930
2931 EV_FREQUENT_CHECK;
2932}
2933
2934void
2935ev_fork_stop (EV_P_ ev_fork *w)
2936{
2937 clear_pending (EV_A_ (W)w);
2938 if (expect_false (!ev_is_active (w)))
2939 return;
2940
2941 EV_FREQUENT_CHECK;
2942
2943 {
2944 int active = ev_active (w);
2945
2946 forks [active - 1] = forks [--forkcnt];
2947 ev_active (forks [active - 1]) = active;
2948 }
2949
2950 ev_stop (EV_A_ (W)w);
2951
2952 EV_FREQUENT_CHECK;
2953}
2954#endif
2955
2956#if EV_ASYNC_ENABLE
2957void
2958ev_async_start (EV_P_ ev_async *w)
2959{
2960 if (expect_false (ev_is_active (w)))
2961 return;
2962
2963 evpipe_init (EV_A);
2964
2965 EV_FREQUENT_CHECK;
2966
2967 ev_start (EV_A_ (W)w, ++asynccnt);
2968 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2969 asyncs [asynccnt - 1] = w;
2970
2971 EV_FREQUENT_CHECK;
2972}
2973
2974void
2975ev_async_stop (EV_P_ ev_async *w)
2976{
2977 clear_pending (EV_A_ (W)w);
2978 if (expect_false (!ev_is_active (w)))
2979 return;
2980
2981 EV_FREQUENT_CHECK;
2982
2983 {
2984 int active = ev_active (w);
2985
2986 asyncs [active - 1] = asyncs [--asynccnt];
2987 ev_active (asyncs [active - 1]) = active;
2988 }
2989
2990 ev_stop (EV_A_ (W)w);
2991
2992 EV_FREQUENT_CHECK;
2993}
2994
2995void
2996ev_async_send (EV_P_ ev_async *w)
2997{
2998 w->sent = 1;
2999 evpipe_write (EV_A_ &gotasync);
3000}
3001#endif
1583 3002
1584/*****************************************************************************/ 3003/*****************************************************************************/
1585 3004
1586struct ev_once 3005struct ev_once
1587{ 3006{
1588 struct ev_io io; 3007 ev_io io;
1589 struct ev_timer to; 3008 ev_timer to;
1590 void (*cb)(int revents, void *arg); 3009 void (*cb)(int revents, void *arg);
1591 void *arg; 3010 void *arg;
1592}; 3011};
1593 3012
1594static void 3013static void
1595once_cb (EV_P_ struct ev_once *once, int revents) 3014once_cb (EV_P_ struct ev_once *once, int revents)
1596{ 3015{
1597 void (*cb)(int revents, void *arg) = once->cb; 3016 void (*cb)(int revents, void *arg) = once->cb;
1598 void *arg = once->arg; 3017 void *arg = once->arg;
1599 3018
1600 ev_io_stop (EV_A_ &once->io); 3019 ev_io_stop (EV_A_ &once->io);
1601 ev_timer_stop (EV_A_ &once->to); 3020 ev_timer_stop (EV_A_ &once->to);
1602 ev_free (once); 3021 ev_free (once);
1603 3022
1604 cb (revents, arg); 3023 cb (revents, arg);
1605} 3024}
1606 3025
1607static void 3026static void
1608once_cb_io (EV_P_ struct ev_io *w, int revents) 3027once_cb_io (EV_P_ ev_io *w, int revents)
1609{ 3028{
1610 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3029 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3030
3031 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1611} 3032}
1612 3033
1613static void 3034static void
1614once_cb_to (EV_P_ struct ev_timer *w, int revents) 3035once_cb_to (EV_P_ ev_timer *w, int revents)
1615{ 3036{
1616 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3037 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3038
3039 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1617} 3040}
1618 3041
1619void 3042void
1620ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3043ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1621{ 3044{
1622 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3045 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1623 3046
1624 if (!once) 3047 if (expect_false (!once))
3048 {
1625 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3049 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1626 else 3050 return;
1627 { 3051 }
3052
1628 once->cb = cb; 3053 once->cb = cb;
1629 once->arg = arg; 3054 once->arg = arg;
1630 3055
1631 ev_init (&once->io, once_cb_io); 3056 ev_init (&once->io, once_cb_io);
1632 if (fd >= 0) 3057 if (fd >= 0)
1633 { 3058 {
1634 ev_io_set (&once->io, fd, events); 3059 ev_io_set (&once->io, fd, events);
1635 ev_io_start (EV_A_ &once->io); 3060 ev_io_start (EV_A_ &once->io);
1636 } 3061 }
1637 3062
1638 ev_init (&once->to, once_cb_to); 3063 ev_init (&once->to, once_cb_to);
1639 if (timeout >= 0.) 3064 if (timeout >= 0.)
1640 { 3065 {
1641 ev_timer_set (&once->to, timeout, 0.); 3066 ev_timer_set (&once->to, timeout, 0.);
1642 ev_timer_start (EV_A_ &once->to); 3067 ev_timer_start (EV_A_ &once->to);
1643 }
1644 } 3068 }
1645} 3069}
3070
3071#if EV_MULTIPLICITY
3072 #include "ev_wrap.h"
3073#endif
1646 3074
1647#ifdef __cplusplus 3075#ifdef __cplusplus
1648} 3076}
1649#endif 3077#endif
1650 3078

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