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Comparing libev/ev.c (file contents):
Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC vs.
Revision 1.293 by root, Mon Jun 29 18:46:52 2009 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) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
71# define EV_USE_REALTIME 0
72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
88# endif
89
90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
103# endif
104# endif
105
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
111# endif
112# endif
113
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
137
138# ifndef EV_USE_EVENTFD
139# if HAVE_EVENTFD
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif
144# endif
145
33#endif 146#endif
34 147
35#include <math.h> 148#include <math.h>
36#include <stdlib.h> 149#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h> 150#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 151#include <stddef.h>
41 152
42#include <stdio.h> 153#include <stdio.h>
43 154
44#include <assert.h> 155#include <assert.h>
45#include <errno.h> 156#include <errno.h>
46#include <sys/types.h> 157#include <sys/types.h>
158#include <time.h>
159
160#include <signal.h>
161
162#ifdef EV_H
163# include EV_H
164#else
165# include "ev.h"
166#endif
167
47#ifndef WIN32 168#ifndef _WIN32
169# include <sys/time.h>
48# include <sys/wait.h> 170# include <sys/wait.h>
171# include <unistd.h>
172#else
173# include <io.h>
174# define WIN32_LEAN_AND_MEAN
175# include <windows.h>
176# ifndef EV_SELECT_IS_WINSOCKET
177# define EV_SELECT_IS_WINSOCKET 1
49#endif 178# endif
50#include <sys/time.h> 179#endif
51#include <time.h>
52 180
53/**/ 181/* this block tries to deduce configuration from header-defined symbols and defaults */
182
183#ifndef EV_USE_CLOCK_SYSCALL
184# if __linux && __GLIBC__ >= 2
185# define EV_USE_CLOCK_SYSCALL 1
186# else
187# define EV_USE_CLOCK_SYSCALL 0
188# endif
189#endif
54 190
55#ifndef EV_USE_MONOTONIC 191#ifndef EV_USE_MONOTONIC
192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
56# define EV_USE_MONOTONIC 1 193# define EV_USE_MONOTONIC 1
194# else
195# define EV_USE_MONOTONIC 0
196# endif
197#endif
198
199#ifndef EV_USE_REALTIME
200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
201#endif
202
203#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1
206# else
207# define EV_USE_NANOSLEEP 0
208# endif
57#endif 209#endif
58 210
59#ifndef EV_USE_SELECT 211#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 212# define EV_USE_SELECT 1
61#endif 213#endif
62 214
63#ifndef EV_USE_POLL 215#ifndef EV_USE_POLL
64# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 216# ifdef _WIN32
217# define EV_USE_POLL 0
218# else
219# define EV_USE_POLL 1
220# endif
65#endif 221#endif
66 222
67#ifndef EV_USE_EPOLL 223#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1
226# else
68# define EV_USE_EPOLL 0 227# define EV_USE_EPOLL 0
228# endif
69#endif 229#endif
70 230
71#ifndef EV_USE_KQUEUE 231#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 232# define EV_USE_KQUEUE 0
73#endif 233#endif
74 234
75#ifndef EV_USE_REALTIME 235#ifndef EV_USE_PORT
236# define EV_USE_PORT 0
237#endif
238
239#ifndef EV_USE_INOTIFY
240# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
76# define EV_USE_REALTIME 1 241# define EV_USE_INOTIFY 1
242# else
243# define EV_USE_INOTIFY 0
77#endif 244# endif
245#endif
78 246
79/**/ 247#ifndef EV_PID_HASHSIZE
248# if EV_MINIMAL
249# define EV_PID_HASHSIZE 1
250# else
251# define EV_PID_HASHSIZE 16
252# endif
253#endif
254
255#ifndef EV_INOTIFY_HASHSIZE
256# if EV_MINIMAL
257# define EV_INOTIFY_HASHSIZE 1
258# else
259# define EV_INOTIFY_HASHSIZE 16
260# endif
261#endif
262
263#ifndef EV_USE_EVENTFD
264# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265# define EV_USE_EVENTFD 1
266# else
267# define EV_USE_EVENTFD 0
268# endif
269#endif
270
271#if 0 /* debugging */
272# define EV_VERIFY 3
273# define EV_USE_4HEAP 1
274# define EV_HEAP_CACHE_AT 1
275#endif
276
277#ifndef EV_VERIFY
278# define EV_VERIFY !EV_MINIMAL
279#endif
280
281#ifndef EV_USE_4HEAP
282# define EV_USE_4HEAP !EV_MINIMAL
283#endif
284
285#ifndef EV_HEAP_CACHE_AT
286# define EV_HEAP_CACHE_AT !EV_MINIMAL
287#endif
288
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h>
293# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1
297# else
298# undef EV_USE_CLOCK_SYSCALL
299# define EV_USE_CLOCK_SYSCALL 0
300# endif
301#endif
302
303/* this block fixes any misconfiguration where we know we run into trouble otherwise */
80 304
81#ifndef CLOCK_MONOTONIC 305#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 306# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 307# define EV_USE_MONOTONIC 0
84#endif 308#endif
… …
86#ifndef CLOCK_REALTIME 310#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 311# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 312# define EV_USE_REALTIME 0
89#endif 313#endif
90 314
315#if !EV_STAT_ENABLE
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318#endif
319
320#if !EV_USE_NANOSLEEP
321# ifndef _WIN32
322# include <sys/select.h>
323# endif
324#endif
325
326#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h>
329# include <sys/inotify.h>
330/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
331# ifndef IN_DONT_FOLLOW
332# undef EV_USE_INOTIFY
333# define EV_USE_INOTIFY 0
334# endif
335#endif
336
337#if EV_SELECT_IS_WINSOCKET
338# include <winsock.h>
339#endif
340
341#if EV_USE_EVENTFD
342/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343# include <stdint.h>
344# ifdef __cplusplus
345extern "C" {
346# endif
347int eventfd (unsigned int initval, int flags);
348# ifdef __cplusplus
349}
350# endif
351#endif
352
91/**/ 353/**/
92 354
355#if EV_VERIFY >= 3
356# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
357#else
358# define EV_FREQUENT_CHECK do { } while (0)
359#endif
360
361/*
362 * This is used to avoid floating point rounding problems.
363 * It is added to ev_rt_now when scheduling periodics
364 * to ensure progress, time-wise, even when rounding
365 * errors are against us.
366 * This value is good at least till the year 4000.
367 * Better solutions welcome.
368 */
369#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
370
93#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 371#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 372#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 373/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
97 374
98#include "ev.h"
99
100#if __GNUC__ >= 3 375#if __GNUC__ >= 4
101# define expect(expr,value) __builtin_expect ((expr),(value)) 376# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline 377# define noinline __attribute__ ((noinline))
103#else 378#else
104# define expect(expr,value) (expr) 379# define expect(expr,value) (expr)
105# define inline static 380# define noinline
381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
382# define inline
383# endif
106#endif 384#endif
107 385
108#define expect_false(expr) expect ((expr) != 0, 0) 386#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1) 387#define expect_true(expr) expect ((expr) != 0, 1)
388#define inline_size static inline
389
390#if EV_MINIMAL
391# define inline_speed static noinline
392#else
393# define inline_speed static inline
394#endif
110 395
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 397#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113 398
399#define EMPTY /* required for microsofts broken pseudo-c compiler */
400#define EMPTY2(a,b) /* used to suppress some warnings */
401
114typedef struct ev_watcher *W; 402typedef ev_watcher *W;
115typedef struct ev_watcher_list *WL; 403typedef ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT; 404typedef ev_watcher_time *WT;
117 405
406#define ev_active(w) ((W)(w))->active
407#define ev_at(w) ((WT)(w))->at
408
409#if EV_USE_REALTIME
410/* sig_atomic_t is used to avoid per-thread variables or locking but still */
411/* giving it a reasonably high chance of working on typical architetcures */
412static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
413#endif
414
415#if EV_USE_MONOTONIC
118static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 416static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
417#endif
418
419#ifdef _WIN32
420# include "ev_win32.c"
421#endif
119 422
120/*****************************************************************************/ 423/*****************************************************************************/
121 424
425static void (*syserr_cb)(const char *msg);
426
427void
428ev_set_syserr_cb (void (*cb)(const char *msg))
429{
430 syserr_cb = cb;
431}
432
433static void noinline
434ev_syserr (const char *msg)
435{
436 if (!msg)
437 msg = "(libev) system error";
438
439 if (syserr_cb)
440 syserr_cb (msg);
441 else
442 {
443 perror (msg);
444 abort ();
445 }
446}
447
448static void *
449ev_realloc_emul (void *ptr, long size)
450{
451 /* some systems, notably openbsd and darwin, fail to properly
452 * implement realloc (x, 0) (as required by both ansi c-98 and
453 * the single unix specification, so work around them here.
454 */
455
456 if (size)
457 return realloc (ptr, size);
458
459 free (ptr);
460 return 0;
461}
462
463static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
464
465void
466ev_set_allocator (void *(*cb)(void *ptr, long size))
467{
468 alloc = cb;
469}
470
471inline_speed void *
472ev_realloc (void *ptr, long size)
473{
474 ptr = alloc (ptr, size);
475
476 if (!ptr && size)
477 {
478 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
479 abort ();
480 }
481
482 return ptr;
483}
484
485#define ev_malloc(size) ev_realloc (0, (size))
486#define ev_free(ptr) ev_realloc ((ptr), 0)
487
488/*****************************************************************************/
489
490/* file descriptor info structure */
122typedef struct 491typedef struct
123{ 492{
124 struct ev_watcher_list *head; 493 WL head;
125 unsigned char events; 494 unsigned char events; /* the events watched for */
495 unsigned char reify; /* flag set when this ANFD needs reification */
496 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
126 unsigned char reify; 497 unsigned char unused;
498#if EV_USE_EPOLL
499 unsigned int egen; /* generation counter to counter epoll bugs */
500#endif
501#if EV_SELECT_IS_WINSOCKET
502 SOCKET handle;
503#endif
127} ANFD; 504} ANFD;
128 505
506/* stores the pending event set for a given watcher */
129typedef struct 507typedef struct
130{ 508{
131 W w; 509 W w;
132 int events; 510 int events; /* the pending event set for the given watcher */
133} ANPENDING; 511} ANPENDING;
134 512
513#if EV_USE_INOTIFY
514/* hash table entry per inotify-id */
515typedef struct
516{
517 WL head;
518} ANFS;
519#endif
520
521/* Heap Entry */
522#if EV_HEAP_CACHE_AT
523 /* a heap element */
524 typedef struct {
525 ev_tstamp at;
526 WT w;
527 } ANHE;
528
529 #define ANHE_w(he) (he).w /* access watcher, read-write */
530 #define ANHE_at(he) (he).at /* access cached at, read-only */
531 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
532#else
533 /* a heap element */
534 typedef WT ANHE;
535
536 #define ANHE_w(he) (he)
537 #define ANHE_at(he) (he)->at
538 #define ANHE_at_cache(he)
539#endif
540
135#if EV_MULTIPLICITY 541#if EV_MULTIPLICITY
136 542
137struct ev_loop 543 struct ev_loop
138{ 544 {
545 ev_tstamp ev_rt_now;
546 #define ev_rt_now ((loop)->ev_rt_now)
139# define VAR(name,decl) decl; 547 #define VAR(name,decl) decl;
140# include "ev_vars.h" 548 #include "ev_vars.h"
141};
142# undef VAR 549 #undef VAR
550 };
143# include "ev_wrap.h" 551 #include "ev_wrap.h"
552
553 static struct ev_loop default_loop_struct;
554 struct ev_loop *ev_default_loop_ptr;
144 555
145#else 556#else
146 557
558 ev_tstamp ev_rt_now;
147# define VAR(name,decl) static decl; 559 #define VAR(name,decl) static decl;
148# include "ev_vars.h" 560 #include "ev_vars.h"
149# undef VAR 561 #undef VAR
562
563 static int ev_default_loop_ptr;
150 564
151#endif 565#endif
152 566
153/*****************************************************************************/ 567/*****************************************************************************/
154 568
155inline ev_tstamp 569#ifndef EV_HAVE_EV_TIME
570ev_tstamp
156ev_time (void) 571ev_time (void)
157{ 572{
158#if EV_USE_REALTIME 573#if EV_USE_REALTIME
574 if (expect_true (have_realtime))
575 {
159 struct timespec ts; 576 struct timespec ts;
160 clock_gettime (CLOCK_REALTIME, &ts); 577 clock_gettime (CLOCK_REALTIME, &ts);
161 return ts.tv_sec + ts.tv_nsec * 1e-9; 578 return ts.tv_sec + ts.tv_nsec * 1e-9;
162#else 579 }
580#endif
581
163 struct timeval tv; 582 struct timeval tv;
164 gettimeofday (&tv, 0); 583 gettimeofday (&tv, 0);
165 return tv.tv_sec + tv.tv_usec * 1e-6; 584 return tv.tv_sec + tv.tv_usec * 1e-6;
166#endif
167} 585}
586#endif
168 587
169inline ev_tstamp 588inline_size ev_tstamp
170get_clock (void) 589get_clock (void)
171{ 590{
172#if EV_USE_MONOTONIC 591#if EV_USE_MONOTONIC
173 if (expect_true (have_monotonic)) 592 if (expect_true (have_monotonic))
174 { 593 {
… …
179#endif 598#endif
180 599
181 return ev_time (); 600 return ev_time ();
182} 601}
183 602
603#if EV_MULTIPLICITY
184ev_tstamp 604ev_tstamp
185ev_now (EV_P) 605ev_now (EV_P)
186{ 606{
187 return rt_now; 607 return ev_rt_now;
188} 608}
609#endif
189 610
190#define array_roundsize(base,n) ((n) | 4 & ~3) 611void
191 612ev_sleep (ev_tstamp delay)
192#define array_needsize(base,cur,cnt,init) \ 613{
193 if (expect_false ((cnt) > cur)) \ 614 if (delay > 0.)
194 { \
195 int newcnt = cur; \
196 do \
197 { \
198 newcnt = array_roundsize (base, newcnt << 1); \
199 } \
200 while ((cnt) > newcnt); \
201 \
202 base = realloc (base, sizeof (*base) * (newcnt)); \
203 init (base + cur, newcnt - cur); \
204 cur = newcnt; \
205 } 615 {
616#if EV_USE_NANOSLEEP
617 struct timespec ts;
618
619 ts.tv_sec = (time_t)delay;
620 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
621
622 nanosleep (&ts, 0);
623#elif defined(_WIN32)
624 Sleep ((unsigned long)(delay * 1e3));
625#else
626 struct timeval tv;
627
628 tv.tv_sec = (time_t)delay;
629 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
630
631 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
632 /* somehting not guaranteed by newer posix versions, but guaranteed */
633 /* by older ones */
634 select (0, 0, 0, 0, &tv);
635#endif
636 }
637}
206 638
207/*****************************************************************************/ 639/*****************************************************************************/
208 640
209static void 641#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
210anfds_init (ANFD *base, int count)
211{
212 while (count--)
213 {
214 base->head = 0;
215 base->events = EV_NONE;
216 base->reify = 0;
217 642
218 ++base; 643/* find a suitable new size for the given array, */
644/* hopefully by rounding to a ncie-to-malloc size */
645inline_size int
646array_nextsize (int elem, int cur, int cnt)
647{
648 int ncur = cur + 1;
649
650 do
651 ncur <<= 1;
652 while (cnt > ncur);
653
654 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
655 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
219 } 656 {
220} 657 ncur *= elem;
221 658 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
222static void 659 ncur = ncur - sizeof (void *) * 4;
223event (EV_P_ W w, int events) 660 ncur /= elem;
224{
225 if (w->pending)
226 { 661 }
662
663 return ncur;
664}
665
666static noinline void *
667array_realloc (int elem, void *base, int *cur, int cnt)
668{
669 *cur = array_nextsize (elem, *cur, cnt);
670 return ev_realloc (base, elem * *cur);
671}
672
673#define array_init_zero(base,count) \
674 memset ((void *)(base), 0, sizeof (*(base)) * (count))
675
676#define array_needsize(type,base,cur,cnt,init) \
677 if (expect_false ((cnt) > (cur))) \
678 { \
679 int ocur_ = (cur); \
680 (base) = (type *)array_realloc \
681 (sizeof (type), (base), &(cur), (cnt)); \
682 init ((base) + (ocur_), (cur) - ocur_); \
683 }
684
685#if 0
686#define array_slim(type,stem) \
687 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
688 { \
689 stem ## max = array_roundsize (stem ## cnt >> 1); \
690 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
691 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
692 }
693#endif
694
695#define array_free(stem, idx) \
696 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
697
698/*****************************************************************************/
699
700/* dummy callback for pending events */
701static void noinline
702pendingcb (EV_P_ ev_prepare *w, int revents)
703{
704}
705
706void noinline
707ev_feed_event (EV_P_ void *w, int revents)
708{
709 W w_ = (W)w;
710 int pri = ABSPRI (w_);
711
712 if (expect_false (w_->pending))
713 pendings [pri][w_->pending - 1].events |= revents;
714 else
715 {
716 w_->pending = ++pendingcnt [pri];
717 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
718 pendings [pri][w_->pending - 1].w = w_;
227 pendings [ABSPRI (w)][w->pending - 1].events |= events; 719 pendings [pri][w_->pending - 1].events = revents;
228 return;
229 } 720 }
230
231 w->pending = ++pendingcnt [ABSPRI (w)];
232 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
233 pendings [ABSPRI (w)][w->pending - 1].w = w;
234 pendings [ABSPRI (w)][w->pending - 1].events = events;
235} 721}
236 722
237static void 723inline_speed void
724feed_reverse (EV_P_ W w)
725{
726 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
727 rfeeds [rfeedcnt++] = w;
728}
729
730inline_size void
731feed_reverse_done (EV_P_ int revents)
732{
733 do
734 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
735 while (rfeedcnt);
736}
737
738inline_speed void
238queue_events (EV_P_ W *events, int eventcnt, int type) 739queue_events (EV_P_ W *events, int eventcnt, int type)
239{ 740{
240 int i; 741 int i;
241 742
242 for (i = 0; i < eventcnt; ++i) 743 for (i = 0; i < eventcnt; ++i)
243 event (EV_A_ events [i], type); 744 ev_feed_event (EV_A_ events [i], type);
244} 745}
245 746
246static void 747/*****************************************************************************/
748
749inline_speed void
247fd_event (EV_P_ int fd, int events) 750fd_event (EV_P_ int fd, int revents)
248{ 751{
249 ANFD *anfd = anfds + fd; 752 ANFD *anfd = anfds + fd;
250 struct ev_io *w; 753 ev_io *w;
251 754
252 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 755 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
253 { 756 {
254 int ev = w->events & events; 757 int ev = w->events & revents;
255 758
256 if (ev) 759 if (ev)
257 event (EV_A_ (W)w, ev); 760 ev_feed_event (EV_A_ (W)w, ev);
258 } 761 }
259} 762}
260 763
261/*****************************************************************************/ 764void
765ev_feed_fd_event (EV_P_ int fd, int revents)
766{
767 if (fd >= 0 && fd < anfdmax)
768 fd_event (EV_A_ fd, revents);
769}
262 770
263static void 771/* make sure the external fd watch events are in-sync */
772/* with the kernel/libev internal state */
773inline_size void
264fd_reify (EV_P) 774fd_reify (EV_P)
265{ 775{
266 int i; 776 int i;
267 777
268 for (i = 0; i < fdchangecnt; ++i) 778 for (i = 0; i < fdchangecnt; ++i)
269 { 779 {
270 int fd = fdchanges [i]; 780 int fd = fdchanges [i];
271 ANFD *anfd = anfds + fd; 781 ANFD *anfd = anfds + fd;
272 struct ev_io *w; 782 ev_io *w;
273 783
274 int events = 0; 784 unsigned char events = 0;
275 785
276 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 786 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
277 events |= w->events; 787 events |= (unsigned char)w->events;
278 788
279 anfd->reify = 0; 789#if EV_SELECT_IS_WINSOCKET
280 790 if (events)
281 if (anfd->events != events)
282 { 791 {
283 method_modify (EV_A_ fd, anfd->events, events); 792 unsigned long arg;
284 anfd->events = events; 793 #ifdef EV_FD_TO_WIN32_HANDLE
794 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
795 #else
796 anfd->handle = _get_osfhandle (fd);
797 #endif
798 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
285 } 799 }
800#endif
801
802 {
803 unsigned char o_events = anfd->events;
804 unsigned char o_reify = anfd->reify;
805
806 anfd->reify = 0;
807 anfd->events = events;
808
809 if (o_events != events || o_reify & EV__IOFDSET)
810 backend_modify (EV_A_ fd, o_events, events);
811 }
286 } 812 }
287 813
288 fdchangecnt = 0; 814 fdchangecnt = 0;
289} 815}
290 816
291static void 817/* something about the given fd changed */
818inline_size void
292fd_change (EV_P_ int fd) 819fd_change (EV_P_ int fd, int flags)
293{ 820{
294 if (anfds [fd].reify || fdchangecnt < 0) 821 unsigned char reify = anfds [fd].reify;
295 return;
296
297 anfds [fd].reify = 1; 822 anfds [fd].reify |= flags;
298 823
824 if (expect_true (!reify))
825 {
299 ++fdchangecnt; 826 ++fdchangecnt;
300 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 827 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
301 fdchanges [fdchangecnt - 1] = fd; 828 fdchanges [fdchangecnt - 1] = fd;
829 }
302} 830}
303 831
304static void 832/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
833inline_speed void
305fd_kill (EV_P_ int fd) 834fd_kill (EV_P_ int fd)
306{ 835{
307 struct ev_io *w; 836 ev_io *w;
308 837
309 while ((w = (struct ev_io *)anfds [fd].head)) 838 while ((w = (ev_io *)anfds [fd].head))
310 { 839 {
311 ev_io_stop (EV_A_ w); 840 ev_io_stop (EV_A_ w);
312 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 841 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
313 } 842 }
843}
844
845/* check whether the given fd is atcually valid, for error recovery */
846inline_size int
847fd_valid (int fd)
848{
849#ifdef _WIN32
850 return _get_osfhandle (fd) != -1;
851#else
852 return fcntl (fd, F_GETFD) != -1;
853#endif
314} 854}
315 855
316/* called on EBADF to verify fds */ 856/* called on EBADF to verify fds */
317static void 857static void noinline
318fd_ebadf (EV_P) 858fd_ebadf (EV_P)
319{ 859{
320 int fd; 860 int fd;
321 861
322 for (fd = 0; fd < anfdmax; ++fd) 862 for (fd = 0; fd < anfdmax; ++fd)
323 if (anfds [fd].events) 863 if (anfds [fd].events)
324 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 864 if (!fd_valid (fd) && errno == EBADF)
325 fd_kill (EV_A_ fd); 865 fd_kill (EV_A_ fd);
326} 866}
327 867
328/* called on ENOMEM in select/poll to kill some fds and retry */ 868/* called on ENOMEM in select/poll to kill some fds and retry */
329static void 869static void noinline
330fd_enomem (EV_P) 870fd_enomem (EV_P)
331{ 871{
332 int fd = anfdmax; 872 int fd;
333 873
334 while (fd--) 874 for (fd = anfdmax; fd--; )
335 if (anfds [fd].events) 875 if (anfds [fd].events)
336 { 876 {
337 close (fd);
338 fd_kill (EV_A_ fd); 877 fd_kill (EV_A_ fd);
339 return; 878 return;
340 } 879 }
341} 880}
342 881
343/* susually called after fork if method needs to re-arm all fds from scratch */ 882/* usually called after fork if backend needs to re-arm all fds from scratch */
344static void 883static void noinline
345fd_rearm_all (EV_P) 884fd_rearm_all (EV_P)
346{ 885{
347 int fd; 886 int fd;
348 887
349 /* this should be highly optimised to not do anything but set a flag */
350 for (fd = 0; fd < anfdmax; ++fd) 888 for (fd = 0; fd < anfdmax; ++fd)
351 if (anfds [fd].events) 889 if (anfds [fd].events)
352 { 890 {
353 anfds [fd].events = 0; 891 anfds [fd].events = 0;
354 fd_change (fd); 892 anfds [fd].emask = 0;
893 fd_change (EV_A_ fd, EV__IOFDSET | 1);
355 } 894 }
356} 895}
357 896
358/*****************************************************************************/ 897/*****************************************************************************/
359 898
360static void 899/*
361upheap (WT *heap, int k) 900 * the heap functions want a real array index. array index 0 uis guaranteed to not
362{ 901 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
363 WT w = heap [k]; 902 * the branching factor of the d-tree.
903 */
364 904
365 while (k && heap [k >> 1]->at > w->at) 905/*
366 { 906 * at the moment we allow libev the luxury of two heaps,
367 heap [k] = heap [k >> 1]; 907 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
368 heap [k]->active = k + 1; 908 * which is more cache-efficient.
369 k >>= 1; 909 * the difference is about 5% with 50000+ watchers.
370 } 910 */
911#if EV_USE_4HEAP
371 912
372 heap [k] = w; 913#define DHEAP 4
373 heap [k]->active = k + 1; 914#define HEAP0 (DHEAP - 1) /* index of first element in heap */
915#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
916#define UPHEAP_DONE(p,k) ((p) == (k))
374 917
375} 918/* away from the root */
376 919inline_speed void
377static void
378downheap (WT *heap, int N, int k) 920downheap (ANHE *heap, int N, int k)
379{ 921{
380 WT w = heap [k]; 922 ANHE he = heap [k];
923 ANHE *E = heap + N + HEAP0;
381 924
382 while (k < (N >> 1)) 925 for (;;)
383 { 926 {
384 int j = k << 1; 927 ev_tstamp minat;
928 ANHE *minpos;
929 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
385 930
386 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 931 /* find minimum child */
932 if (expect_true (pos + DHEAP - 1 < E))
387 ++j; 933 {
388 934 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
389 if (w->at <= heap [j]->at) 935 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
936 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
937 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
938 }
939 else if (pos < E)
940 {
941 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
942 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
943 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
944 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
945 }
946 else
390 break; 947 break;
391 948
949 if (ANHE_at (he) <= minat)
950 break;
951
952 heap [k] = *minpos;
953 ev_active (ANHE_w (*minpos)) = k;
954
955 k = minpos - heap;
956 }
957
958 heap [k] = he;
959 ev_active (ANHE_w (he)) = k;
960}
961
962#else /* 4HEAP */
963
964#define HEAP0 1
965#define HPARENT(k) ((k) >> 1)
966#define UPHEAP_DONE(p,k) (!(p))
967
968/* away from the root */
969inline_speed void
970downheap (ANHE *heap, int N, int k)
971{
972 ANHE he = heap [k];
973
974 for (;;)
975 {
976 int c = k << 1;
977
978 if (c > N + HEAP0 - 1)
979 break;
980
981 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
982 ? 1 : 0;
983
984 if (ANHE_at (he) <= ANHE_at (heap [c]))
985 break;
986
392 heap [k] = heap [j]; 987 heap [k] = heap [c];
393 heap [k]->active = k + 1; 988 ev_active (ANHE_w (heap [k])) = k;
989
394 k = j; 990 k = c;
395 } 991 }
396 992
397 heap [k] = w; 993 heap [k] = he;
398 heap [k]->active = k + 1; 994 ev_active (ANHE_w (he)) = k;
995}
996#endif
997
998/* towards the root */
999inline_speed void
1000upheap (ANHE *heap, int k)
1001{
1002 ANHE he = heap [k];
1003
1004 for (;;)
1005 {
1006 int p = HPARENT (k);
1007
1008 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1009 break;
1010
1011 heap [k] = heap [p];
1012 ev_active (ANHE_w (heap [k])) = k;
1013 k = p;
1014 }
1015
1016 heap [k] = he;
1017 ev_active (ANHE_w (he)) = k;
1018}
1019
1020/* move an element suitably so it is in a correct place */
1021inline_size void
1022adjustheap (ANHE *heap, int N, int k)
1023{
1024 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
1025 upheap (heap, k);
1026 else
1027 downheap (heap, N, k);
1028}
1029
1030/* rebuild the heap: this function is used only once and executed rarely */
1031inline_size void
1032reheap (ANHE *heap, int N)
1033{
1034 int i;
1035
1036 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1037 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1038 for (i = 0; i < N; ++i)
1039 upheap (heap, i + HEAP0);
399} 1040}
400 1041
401/*****************************************************************************/ 1042/*****************************************************************************/
402 1043
1044/* associate signal watchers to a signal signal */
403typedef struct 1045typedef struct
404{ 1046{
405 struct ev_watcher_list *head; 1047 WL head;
406 sig_atomic_t volatile gotsig; 1048 EV_ATOMIC_T gotsig;
407} ANSIG; 1049} ANSIG;
408 1050
409static ANSIG *signals; 1051static ANSIG *signals;
410static int signalmax; 1052static int signalmax;
411 1053
412static int sigpipe [2]; 1054static EV_ATOMIC_T gotsig;
413static sig_atomic_t volatile gotsig;
414static struct ev_io sigev;
415 1055
1056/*****************************************************************************/
1057
1058/* used to prepare libev internal fd's */
1059/* this is not fork-safe */
1060inline_speed void
1061fd_intern (int fd)
1062{
1063#ifdef _WIN32
1064 unsigned long arg = 1;
1065 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1066#else
1067 fcntl (fd, F_SETFD, FD_CLOEXEC);
1068 fcntl (fd, F_SETFL, O_NONBLOCK);
1069#endif
1070}
1071
1072static void noinline
1073evpipe_init (EV_P)
1074{
1075 if (!ev_is_active (&pipe_w))
1076 {
1077#if EV_USE_EVENTFD
1078 if ((evfd = eventfd (0, 0)) >= 0)
1079 {
1080 evpipe [0] = -1;
1081 fd_intern (evfd);
1082 ev_io_set (&pipe_w, evfd, EV_READ);
1083 }
1084 else
1085#endif
1086 {
1087 while (pipe (evpipe))
1088 ev_syserr ("(libev) error creating signal/async pipe");
1089
1090 fd_intern (evpipe [0]);
1091 fd_intern (evpipe [1]);
1092 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1093 }
1094
1095 ev_io_start (EV_A_ &pipe_w);
1096 ev_unref (EV_A); /* watcher should not keep loop alive */
1097 }
1098}
1099
1100inline_size void
1101evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1102{
1103 if (!*flag)
1104 {
1105 int old_errno = errno; /* save errno because write might clobber it */
1106
1107 *flag = 1;
1108
1109#if EV_USE_EVENTFD
1110 if (evfd >= 0)
1111 {
1112 uint64_t counter = 1;
1113 write (evfd, &counter, sizeof (uint64_t));
1114 }
1115 else
1116#endif
1117 write (evpipe [1], &old_errno, 1);
1118
1119 errno = old_errno;
1120 }
1121}
1122
1123/* called whenever the libev signal pipe */
1124/* got some events (signal, async) */
416static void 1125static void
417signals_init (ANSIG *base, int count) 1126pipecb (EV_P_ ev_io *iow, int revents)
418{ 1127{
419 while (count--) 1128#if EV_USE_EVENTFD
1129 if (evfd >= 0)
1130 {
1131 uint64_t counter;
1132 read (evfd, &counter, sizeof (uint64_t));
420 { 1133 }
421 base->head = 0; 1134 else
1135#endif
1136 {
1137 char dummy;
1138 read (evpipe [0], &dummy, 1);
1139 }
1140
1141 if (gotsig && ev_is_default_loop (EV_A))
1142 {
1143 int signum;
422 base->gotsig = 0; 1144 gotsig = 0;
423 1145
424 ++base; 1146 for (signum = signalmax; signum--; )
1147 if (signals [signum].gotsig)
1148 ev_feed_signal_event (EV_A_ signum + 1);
1149 }
1150
1151#if EV_ASYNC_ENABLE
1152 if (gotasync)
425 } 1153 {
1154 int i;
1155 gotasync = 0;
1156
1157 for (i = asynccnt; i--; )
1158 if (asyncs [i]->sent)
1159 {
1160 asyncs [i]->sent = 0;
1161 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1162 }
1163 }
1164#endif
426} 1165}
1166
1167/*****************************************************************************/
427 1168
428static void 1169static void
429sighandler (int signum) 1170ev_sighandler (int signum)
430{ 1171{
1172#if EV_MULTIPLICITY
1173 struct ev_loop *loop = &default_loop_struct;
1174#endif
1175
1176#if _WIN32
1177 signal (signum, ev_sighandler);
1178#endif
1179
431 signals [signum - 1].gotsig = 1; 1180 signals [signum - 1].gotsig = 1;
432 1181 evpipe_write (EV_A_ &gotsig);
433 if (!gotsig)
434 {
435 int old_errno = errno;
436 gotsig = 1;
437 write (sigpipe [1], &signum, 1);
438 errno = old_errno;
439 }
440} 1182}
441 1183
442static void 1184void noinline
443sigcb (EV_P_ struct ev_io *iow, int revents) 1185ev_feed_signal_event (EV_P_ int signum)
444{ 1186{
445 struct ev_watcher_list *w; 1187 WL w;
1188
1189#if EV_MULTIPLICITY
1190 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1191#endif
1192
446 int signum; 1193 --signum;
447 1194
448 read (sigpipe [0], &revents, 1); 1195 if (signum < 0 || signum >= signalmax)
449 gotsig = 0; 1196 return;
450 1197
451 for (signum = signalmax; signum--; )
452 if (signals [signum].gotsig)
453 {
454 signals [signum].gotsig = 0; 1198 signals [signum].gotsig = 0;
455 1199
456 for (w = signals [signum].head; w; w = w->next) 1200 for (w = signals [signum].head; w; w = w->next)
457 event (EV_A_ (W)w, EV_SIGNAL); 1201 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
458 }
459}
460
461static void
462siginit (EV_P)
463{
464#ifndef WIN32
465 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
466 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
467
468 /* rather than sort out wether we really need nb, set it */
469 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
470 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
471#endif
472
473 ev_io_set (&sigev, sigpipe [0], EV_READ);
474 ev_io_start (EV_A_ &sigev);
475 ev_unref (EV_A); /* child watcher should not keep loop alive */
476} 1202}
477 1203
478/*****************************************************************************/ 1204/*****************************************************************************/
479 1205
1206static WL childs [EV_PID_HASHSIZE];
1207
480#ifndef WIN32 1208#ifndef _WIN32
481 1209
482static struct ev_child *childs [PID_HASHSIZE];
483static struct ev_signal childev; 1210static ev_signal childev;
1211
1212#ifndef WIFCONTINUED
1213# define WIFCONTINUED(status) 0
1214#endif
1215
1216/* handle a single child status event */
1217inline_speed void
1218child_reap (EV_P_ int chain, int pid, int status)
1219{
1220 ev_child *w;
1221 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1222
1223 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1224 {
1225 if ((w->pid == pid || !w->pid)
1226 && (!traced || (w->flags & 1)))
1227 {
1228 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1229 w->rpid = pid;
1230 w->rstatus = status;
1231 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1232 }
1233 }
1234}
484 1235
485#ifndef WCONTINUED 1236#ifndef WCONTINUED
486# define WCONTINUED 0 1237# define WCONTINUED 0
487#endif 1238#endif
488 1239
1240/* called on sigchld etc., calls waitpid */
489static void 1241static void
490child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
491{
492 struct ev_child *w;
493
494 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
495 if (w->pid == pid || !w->pid)
496 {
497 w->priority = sw->priority; /* need to do it *now* */
498 w->rpid = pid;
499 w->rstatus = status;
500 event (EV_A_ (W)w, EV_CHILD);
501 }
502}
503
504static void
505childcb (EV_P_ struct ev_signal *sw, int revents) 1242childcb (EV_P_ ev_signal *sw, int revents)
506{ 1243{
507 int pid, status; 1244 int pid, status;
508 1245
1246 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
509 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1247 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
510 { 1248 if (!WCONTINUED
1249 || errno != EINVAL
1250 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1251 return;
1252
511 /* make sure we are called again until all childs have been reaped */ 1253 /* make sure we are called again until all children have been reaped */
1254 /* we need to do it this way so that the callback gets called before we continue */
512 event (EV_A_ (W)sw, EV_SIGNAL); 1255 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
513 1256
514 child_reap (EV_A_ sw, pid, pid, status); 1257 child_reap (EV_A_ pid, pid, status);
1258 if (EV_PID_HASHSIZE > 1)
515 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1259 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
516 }
517} 1260}
518 1261
519#endif 1262#endif
520 1263
521/*****************************************************************************/ 1264/*****************************************************************************/
522 1265
1266#if EV_USE_PORT
1267# include "ev_port.c"
1268#endif
523#if EV_USE_KQUEUE 1269#if EV_USE_KQUEUE
524# include "ev_kqueue.c" 1270# include "ev_kqueue.c"
525#endif 1271#endif
526#if EV_USE_EPOLL 1272#if EV_USE_EPOLL
527# include "ev_epoll.c" 1273# include "ev_epoll.c"
… …
544{ 1290{
545 return EV_VERSION_MINOR; 1291 return EV_VERSION_MINOR;
546} 1292}
547 1293
548/* return true if we are running with elevated privileges and should ignore env variables */ 1294/* return true if we are running with elevated privileges and should ignore env variables */
549static int 1295int inline_size
550enable_secure (void) 1296enable_secure (void)
551{ 1297{
552#ifdef WIN32 1298#ifdef _WIN32
553 return 0; 1299 return 0;
554#else 1300#else
555 return getuid () != geteuid () 1301 return getuid () != geteuid ()
556 || getgid () != getegid (); 1302 || getgid () != getegid ();
557#endif 1303#endif
558} 1304}
559 1305
560int 1306unsigned int
561ev_method (EV_P) 1307ev_supported_backends (void)
562{ 1308{
563 return method; 1309 unsigned int flags = 0;
564}
565 1310
566static void 1311 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
567loop_init (EV_P_ int methods) 1312 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1313 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1314 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1315 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1316
1317 return flags;
1318}
1319
1320unsigned int
1321ev_recommended_backends (void)
568{ 1322{
569 if (!method) 1323 unsigned int flags = ev_supported_backends ();
1324
1325#ifndef __NetBSD__
1326 /* kqueue is borked on everything but netbsd apparently */
1327 /* it usually doesn't work correctly on anything but sockets and pipes */
1328 flags &= ~EVBACKEND_KQUEUE;
1329#endif
1330#ifdef __APPLE__
1331 /* only select works correctly on that "unix-certified" platform */
1332 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1333 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1334#endif
1335
1336 return flags;
1337}
1338
1339unsigned int
1340ev_embeddable_backends (void)
1341{
1342 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1343
1344 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1345 /* please fix it and tell me how to detect the fix */
1346 flags &= ~EVBACKEND_EPOLL;
1347
1348 return flags;
1349}
1350
1351unsigned int
1352ev_backend (EV_P)
1353{
1354 return backend;
1355}
1356
1357unsigned int
1358ev_loop_count (EV_P)
1359{
1360 return loop_count;
1361}
1362
1363void
1364ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1365{
1366 io_blocktime = interval;
1367}
1368
1369void
1370ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1371{
1372 timeout_blocktime = interval;
1373}
1374
1375/* initialise a loop structure, must be zero-initialised */
1376static void noinline
1377loop_init (EV_P_ unsigned int flags)
1378{
1379 if (!backend)
570 { 1380 {
1381#if EV_USE_REALTIME
1382 if (!have_realtime)
1383 {
1384 struct timespec ts;
1385
1386 if (!clock_gettime (CLOCK_REALTIME, &ts))
1387 have_realtime = 1;
1388 }
1389#endif
1390
571#if EV_USE_MONOTONIC 1391#if EV_USE_MONOTONIC
1392 if (!have_monotonic)
1393 {
1394 struct timespec ts;
1395
1396 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1397 have_monotonic = 1;
1398 }
1399#endif
1400
1401 ev_rt_now = ev_time ();
1402 mn_now = get_clock ();
1403 now_floor = mn_now;
1404 rtmn_diff = ev_rt_now - mn_now;
1405
1406 io_blocktime = 0.;
1407 timeout_blocktime = 0.;
1408 backend = 0;
1409 backend_fd = -1;
1410 gotasync = 0;
1411#if EV_USE_INOTIFY
1412 fs_fd = -2;
1413#endif
1414
1415 /* pid check not overridable via env */
1416#ifndef _WIN32
1417 if (flags & EVFLAG_FORKCHECK)
1418 curpid = getpid ();
1419#endif
1420
1421 if (!(flags & EVFLAG_NOENV)
1422 && !enable_secure ()
1423 && getenv ("LIBEV_FLAGS"))
1424 flags = atoi (getenv ("LIBEV_FLAGS"));
1425
1426 if (!(flags & 0x0000ffffU))
1427 flags |= ev_recommended_backends ();
1428
1429#if EV_USE_PORT
1430 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1431#endif
1432#if EV_USE_KQUEUE
1433 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1434#endif
1435#if EV_USE_EPOLL
1436 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1437#endif
1438#if EV_USE_POLL
1439 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1440#endif
1441#if EV_USE_SELECT
1442 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1443#endif
1444
1445 ev_prepare_init (&pending_w, pendingcb);
1446
1447 ev_init (&pipe_w, pipecb);
1448 ev_set_priority (&pipe_w, EV_MAXPRI);
1449 }
1450}
1451
1452/* free up a loop structure */
1453static void noinline
1454loop_destroy (EV_P)
1455{
1456 int i;
1457
1458 if (ev_is_active (&pipe_w))
1459 {
1460 ev_ref (EV_A); /* signal watcher */
1461 ev_io_stop (EV_A_ &pipe_w);
1462
1463#if EV_USE_EVENTFD
1464 if (evfd >= 0)
1465 close (evfd);
1466#endif
1467
1468 if (evpipe [0] >= 0)
1469 {
1470 close (evpipe [0]);
1471 close (evpipe [1]);
1472 }
1473 }
1474
1475#if EV_USE_INOTIFY
1476 if (fs_fd >= 0)
1477 close (fs_fd);
1478#endif
1479
1480 if (backend_fd >= 0)
1481 close (backend_fd);
1482
1483#if EV_USE_PORT
1484 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1485#endif
1486#if EV_USE_KQUEUE
1487 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1488#endif
1489#if EV_USE_EPOLL
1490 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1491#endif
1492#if EV_USE_POLL
1493 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1494#endif
1495#if EV_USE_SELECT
1496 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1497#endif
1498
1499 for (i = NUMPRI; i--; )
1500 {
1501 array_free (pending, [i]);
1502#if EV_IDLE_ENABLE
1503 array_free (idle, [i]);
1504#endif
1505 }
1506
1507 ev_free (anfds); anfdmax = 0;
1508
1509 /* have to use the microsoft-never-gets-it-right macro */
1510 array_free (rfeed, EMPTY);
1511 array_free (fdchange, EMPTY);
1512 array_free (timer, EMPTY);
1513#if EV_PERIODIC_ENABLE
1514 array_free (periodic, EMPTY);
1515#endif
1516#if EV_FORK_ENABLE
1517 array_free (fork, EMPTY);
1518#endif
1519 array_free (prepare, EMPTY);
1520 array_free (check, EMPTY);
1521#if EV_ASYNC_ENABLE
1522 array_free (async, EMPTY);
1523#endif
1524
1525 backend = 0;
1526}
1527
1528#if EV_USE_INOTIFY
1529inline_size void infy_fork (EV_P);
1530#endif
1531
1532inline_size void
1533loop_fork (EV_P)
1534{
1535#if EV_USE_PORT
1536 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1537#endif
1538#if EV_USE_KQUEUE
1539 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1540#endif
1541#if EV_USE_EPOLL
1542 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1543#endif
1544#if EV_USE_INOTIFY
1545 infy_fork (EV_A);
1546#endif
1547
1548 if (ev_is_active (&pipe_w))
1549 {
1550 /* this "locks" the handlers against writing to the pipe */
1551 /* while we modify the fd vars */
1552 gotsig = 1;
1553#if EV_ASYNC_ENABLE
1554 gotasync = 1;
1555#endif
1556
1557 ev_ref (EV_A);
1558 ev_io_stop (EV_A_ &pipe_w);
1559
1560#if EV_USE_EVENTFD
1561 if (evfd >= 0)
1562 close (evfd);
1563#endif
1564
1565 if (evpipe [0] >= 0)
1566 {
1567 close (evpipe [0]);
1568 close (evpipe [1]);
1569 }
1570
1571 evpipe_init (EV_A);
1572 /* now iterate over everything, in case we missed something */
1573 pipecb (EV_A_ &pipe_w, EV_READ);
1574 }
1575
1576 postfork = 0;
1577}
1578
1579#if EV_MULTIPLICITY
1580
1581struct ev_loop *
1582ev_loop_new (unsigned int flags)
1583{
1584 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1585
1586 memset (loop, 0, sizeof (struct ev_loop));
1587
1588 loop_init (EV_A_ flags);
1589
1590 if (ev_backend (EV_A))
1591 return loop;
1592
1593 return 0;
1594}
1595
1596void
1597ev_loop_destroy (EV_P)
1598{
1599 loop_destroy (EV_A);
1600 ev_free (loop);
1601}
1602
1603void
1604ev_loop_fork (EV_P)
1605{
1606 postfork = 1; /* must be in line with ev_default_fork */
1607}
1608
1609#if EV_VERIFY
1610static void noinline
1611verify_watcher (EV_P_ W w)
1612{
1613 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1614
1615 if (w->pending)
1616 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1617}
1618
1619static void noinline
1620verify_heap (EV_P_ ANHE *heap, int N)
1621{
1622 int i;
1623
1624 for (i = HEAP0; i < N + HEAP0; ++i)
1625 {
1626 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1627 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1628 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1629
1630 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1631 }
1632}
1633
1634static void noinline
1635array_verify (EV_P_ W *ws, int cnt)
1636{
1637 while (cnt--)
1638 {
1639 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1640 verify_watcher (EV_A_ ws [cnt]);
1641 }
1642}
1643#endif
1644
1645void
1646ev_loop_verify (EV_P)
1647{
1648#if EV_VERIFY
1649 int i;
1650 WL w;
1651
1652 assert (activecnt >= -1);
1653
1654 assert (fdchangemax >= fdchangecnt);
1655 for (i = 0; i < fdchangecnt; ++i)
1656 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1657
1658 assert (anfdmax >= 0);
1659 for (i = 0; i < anfdmax; ++i)
1660 for (w = anfds [i].head; w; w = w->next)
572 { 1661 {
573 struct timespec ts; 1662 verify_watcher (EV_A_ (W)w);
574 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1663 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
575 have_monotonic = 1; 1664 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
576 } 1665 }
1666
1667 assert (timermax >= timercnt);
1668 verify_heap (EV_A_ timers, timercnt);
1669
1670#if EV_PERIODIC_ENABLE
1671 assert (periodicmax >= periodiccnt);
1672 verify_heap (EV_A_ periodics, periodiccnt);
1673#endif
1674
1675 for (i = NUMPRI; i--; )
1676 {
1677 assert (pendingmax [i] >= pendingcnt [i]);
1678#if EV_IDLE_ENABLE
1679 assert (idleall >= 0);
1680 assert (idlemax [i] >= idlecnt [i]);
1681 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1682#endif
1683 }
1684
1685#if EV_FORK_ENABLE
1686 assert (forkmax >= forkcnt);
1687 array_verify (EV_A_ (W *)forks, forkcnt);
1688#endif
1689
1690#if EV_ASYNC_ENABLE
1691 assert (asyncmax >= asynccnt);
1692 array_verify (EV_A_ (W *)asyncs, asynccnt);
1693#endif
1694
1695 assert (preparemax >= preparecnt);
1696 array_verify (EV_A_ (W *)prepares, preparecnt);
1697
1698 assert (checkmax >= checkcnt);
1699 array_verify (EV_A_ (W *)checks, checkcnt);
1700
1701# if 0
1702 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1703 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
577#endif 1704# endif
578
579 rt_now = ev_time ();
580 mn_now = get_clock ();
581 now_floor = mn_now;
582 rtmn_diff = rt_now - mn_now;
583
584 if (methods == EVMETHOD_AUTO)
585 if (!enable_secure () && getenv ("LIBEV_METHODS"))
586 methods = atoi (getenv ("LIBEV_METHODS"));
587 else
588 methods = EVMETHOD_ANY;
589
590 method = 0;
591#if EV_USE_KQUEUE
592 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
593#endif 1705#endif
594#if EV_USE_EPOLL
595 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
596#endif
597#if EV_USE_POLL
598 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
599#endif
600#if EV_USE_SELECT
601 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
602#endif
603 }
604} 1706}
605 1707
606void 1708#endif /* multiplicity */
607loop_destroy (EV_P)
608{
609#if EV_USE_KQUEUE
610 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
611#endif
612#if EV_USE_EPOLL
613 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
614#endif
615#if EV_USE_POLL
616 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
617#endif
618#if EV_USE_SELECT
619 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
620#endif
621
622 method = 0;
623 /*TODO*/
624}
625
626void
627loop_fork (EV_P)
628{
629 /*TODO*/
630#if EV_USE_EPOLL
631 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
632#endif
633#if EV_USE_KQUEUE
634 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
635#endif
636}
637 1709
638#if EV_MULTIPLICITY 1710#if EV_MULTIPLICITY
639struct ev_loop * 1711struct ev_loop *
640ev_loop_new (int methods) 1712ev_default_loop_init (unsigned int flags)
641{ 1713#else
642 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); 1714int
643 1715ev_default_loop (unsigned int flags)
644 loop_init (EV_A_ methods);
645
646 if (ev_methods (EV_A))
647 return loop;
648
649 return 0;
650}
651
652void
653ev_loop_destroy (EV_P)
654{
655 loop_destroy (EV_A);
656 free (loop);
657}
658
659void
660ev_loop_fork (EV_P)
661{
662 loop_fork (EV_A);
663}
664
665#endif 1716#endif
666 1717{
1718 if (!ev_default_loop_ptr)
1719 {
667#if EV_MULTIPLICITY 1720#if EV_MULTIPLICITY
668struct ev_loop default_loop_struct; 1721 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
669static struct ev_loop *default_loop;
670
671struct ev_loop *
672#else 1722#else
673static int default_loop;
674
675int
676#endif
677ev_default_loop (int methods)
678{
679 if (sigpipe [0] == sigpipe [1])
680 if (pipe (sigpipe))
681 return 0;
682
683 if (!default_loop)
684 {
685#if EV_MULTIPLICITY
686 struct ev_loop *loop = default_loop = &default_loop_struct;
687#else
688 default_loop = 1; 1723 ev_default_loop_ptr = 1;
689#endif 1724#endif
690 1725
691 loop_init (EV_A_ methods); 1726 loop_init (EV_A_ flags);
692 1727
693 if (ev_method (EV_A)) 1728 if (ev_backend (EV_A))
694 { 1729 {
695 ev_watcher_init (&sigev, sigcb);
696 ev_set_priority (&sigev, EV_MAXPRI);
697 siginit (EV_A);
698
699#ifndef WIN32 1730#ifndef _WIN32
700 ev_signal_init (&childev, childcb, SIGCHLD); 1731 ev_signal_init (&childev, childcb, SIGCHLD);
701 ev_set_priority (&childev, EV_MAXPRI); 1732 ev_set_priority (&childev, EV_MAXPRI);
702 ev_signal_start (EV_A_ &childev); 1733 ev_signal_start (EV_A_ &childev);
703 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1734 ev_unref (EV_A); /* child watcher should not keep loop alive */
704#endif 1735#endif
705 } 1736 }
706 else 1737 else
707 default_loop = 0; 1738 ev_default_loop_ptr = 0;
708 } 1739 }
709 1740
710 return default_loop; 1741 return ev_default_loop_ptr;
711} 1742}
712 1743
713void 1744void
714ev_default_destroy (void) 1745ev_default_destroy (void)
715{ 1746{
716#if EV_MULTIPLICITY 1747#if EV_MULTIPLICITY
717 struct ev_loop *loop = default_loop; 1748 struct ev_loop *loop = ev_default_loop_ptr;
718#endif 1749#endif
719 1750
1751 ev_default_loop_ptr = 0;
1752
1753#ifndef _WIN32
720 ev_ref (EV_A); /* child watcher */ 1754 ev_ref (EV_A); /* child watcher */
721 ev_signal_stop (EV_A_ &childev); 1755 ev_signal_stop (EV_A_ &childev);
722 1756#endif
723 ev_ref (EV_A); /* signal watcher */
724 ev_io_stop (EV_A_ &sigev);
725
726 close (sigpipe [0]); sigpipe [0] = 0;
727 close (sigpipe [1]); sigpipe [1] = 0;
728 1757
729 loop_destroy (EV_A); 1758 loop_destroy (EV_A);
730} 1759}
731 1760
732void 1761void
733ev_default_fork (EV_P) 1762ev_default_fork (void)
734{ 1763{
735 loop_fork (EV_A); 1764#if EV_MULTIPLICITY
1765 struct ev_loop *loop = ev_default_loop_ptr;
1766#endif
736 1767
737 ev_io_stop (EV_A_ &sigev); 1768 postfork = 1; /* must be in line with ev_loop_fork */
738 close (sigpipe [0]);
739 close (sigpipe [1]);
740 pipe (sigpipe);
741
742 ev_ref (EV_A); /* signal watcher */
743 siginit (EV_A);
744} 1769}
745 1770
746/*****************************************************************************/ 1771/*****************************************************************************/
747 1772
748static void 1773void
1774ev_invoke (EV_P_ void *w, int revents)
1775{
1776 EV_CB_INVOKE ((W)w, revents);
1777}
1778
1779inline_speed void
749call_pending (EV_P) 1780call_pending (EV_P)
750{ 1781{
751 int pri; 1782 int pri;
752 1783
753 for (pri = NUMPRI; pri--; ) 1784 for (pri = NUMPRI; pri--; )
754 while (pendingcnt [pri]) 1785 while (pendingcnt [pri])
755 { 1786 {
756 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1787 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
757 1788
758 if (p->w) 1789 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
759 { 1790 /* ^ this is no longer true, as pending_w could be here */
1791
760 p->w->pending = 0; 1792 p->w->pending = 0;
761 p->w->cb (EV_A_ p->w, p->events); 1793 EV_CB_INVOKE (p->w, p->events);
762 } 1794 EV_FREQUENT_CHECK;
763 } 1795 }
764} 1796}
765 1797
766static void 1798#if EV_IDLE_ENABLE
1799/* make idle watchers pending. this handles the "call-idle */
1800/* only when higher priorities are idle" logic */
1801inline_size void
767timers_reify (EV_P) 1802idle_reify (EV_P)
768{ 1803{
769 while (timercnt && timers [0]->at <= mn_now) 1804 if (expect_false (idleall))
770 { 1805 {
771 struct ev_timer *w = timers [0]; 1806 int pri;
772 1807
773 /* first reschedule or stop timer */ 1808 for (pri = NUMPRI; pri--; )
774 if (w->repeat)
775 { 1809 {
776 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1810 if (pendingcnt [pri])
777 w->at = mn_now + w->repeat; 1811 break;
778 downheap ((WT *)timers, timercnt, 0);
779 }
780 else
781 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
782 1812
783 event (EV_A_ (W)w, EV_TIMEOUT); 1813 if (idlecnt [pri])
784 }
785}
786
787static void
788periodics_reify (EV_P)
789{
790 while (periodiccnt && periodics [0]->at <= rt_now)
791 {
792 struct ev_periodic *w = periodics [0];
793
794 /* first reschedule or stop timer */
795 if (w->interval)
796 {
797 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
798 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
799 downheap ((WT *)periodics, periodiccnt, 0);
800 }
801 else
802 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
803
804 event (EV_A_ (W)w, EV_PERIODIC);
805 }
806}
807
808static void
809periodics_reschedule (EV_P)
810{
811 int i;
812
813 /* adjust periodics after time jump */
814 for (i = 0; i < periodiccnt; ++i)
815 {
816 struct ev_periodic *w = periodics [i];
817
818 if (w->interval)
819 {
820 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
821
822 if (fabs (diff) >= 1e-4)
823 { 1814 {
824 ev_periodic_stop (EV_A_ w); 1815 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
825 ev_periodic_start (EV_A_ w); 1816 break;
826
827 i = 0; /* restart loop, inefficient, but time jumps should be rare */
828 } 1817 }
829 } 1818 }
830 } 1819 }
831} 1820}
1821#endif
832 1822
833inline int 1823/* make timers pending */
834time_update_monotonic (EV_P) 1824inline_size void
1825timers_reify (EV_P)
835{ 1826{
836 mn_now = get_clock (); 1827 EV_FREQUENT_CHECK;
837 1828
838 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1829 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
839 {
840 rt_now = rtmn_diff + mn_now;
841 return 0;
842 } 1830 {
843 else 1831 do
1832 {
1833 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1834
1835 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1836
1837 /* first reschedule or stop timer */
1838 if (w->repeat)
1839 {
1840 ev_at (w) += w->repeat;
1841 if (ev_at (w) < mn_now)
1842 ev_at (w) = mn_now;
1843
1844 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1845
1846 ANHE_at_cache (timers [HEAP0]);
1847 downheap (timers, timercnt, HEAP0);
1848 }
1849 else
1850 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1851
1852 EV_FREQUENT_CHECK;
1853 feed_reverse (EV_A_ (W)w);
1854 }
1855 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1856
1857 feed_reverse_done (EV_A_ EV_TIMEOUT);
844 { 1858 }
845 now_floor = mn_now; 1859}
846 rt_now = ev_time (); 1860
847 return 1; 1861#if EV_PERIODIC_ENABLE
1862/* make periodics pending */
1863inline_size void
1864periodics_reify (EV_P)
1865{
1866 EV_FREQUENT_CHECK;
1867
1868 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
848 } 1869 {
849} 1870 int feed_count = 0;
850 1871
851static void 1872 do
852time_update (EV_P) 1873 {
1874 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1875
1876 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1877
1878 /* first reschedule or stop timer */
1879 if (w->reschedule_cb)
1880 {
1881 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1882
1883 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1884
1885 ANHE_at_cache (periodics [HEAP0]);
1886 downheap (periodics, periodiccnt, HEAP0);
1887 }
1888 else if (w->interval)
1889 {
1890 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1891 /* if next trigger time is not sufficiently in the future, put it there */
1892 /* this might happen because of floating point inexactness */
1893 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1894 {
1895 ev_at (w) += w->interval;
1896
1897 /* if interval is unreasonably low we might still have a time in the past */
1898 /* so correct this. this will make the periodic very inexact, but the user */
1899 /* has effectively asked to get triggered more often than possible */
1900 if (ev_at (w) < ev_rt_now)
1901 ev_at (w) = ev_rt_now;
1902 }
1903
1904 ANHE_at_cache (periodics [HEAP0]);
1905 downheap (periodics, periodiccnt, HEAP0);
1906 }
1907 else
1908 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1909
1910 EV_FREQUENT_CHECK;
1911 feed_reverse (EV_A_ (W)w);
1912 }
1913 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1914
1915 feed_reverse_done (EV_A_ EV_PERIODIC);
1916 }
1917}
1918
1919/* simply recalculate all periodics */
1920/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1921static void noinline
1922periodics_reschedule (EV_P)
853{ 1923{
854 int i; 1924 int i;
855 1925
1926 /* adjust periodics after time jump */
1927 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1928 {
1929 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1930
1931 if (w->reschedule_cb)
1932 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1933 else if (w->interval)
1934 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1935
1936 ANHE_at_cache (periodics [i]);
1937 }
1938
1939 reheap (periodics, periodiccnt);
1940}
1941#endif
1942
1943/* adjust all timers by a given offset */
1944static void noinline
1945timers_reschedule (EV_P_ ev_tstamp adjust)
1946{
1947 int i;
1948
1949 for (i = 0; i < timercnt; ++i)
1950 {
1951 ANHE *he = timers + i + HEAP0;
1952 ANHE_w (*he)->at += adjust;
1953 ANHE_at_cache (*he);
1954 }
1955}
1956
1957/* fetch new monotonic and realtime times from the kernel */
1958/* also detetc if there was a timejump, and act accordingly */
1959inline_speed void
1960time_update (EV_P_ ev_tstamp max_block)
1961{
856#if EV_USE_MONOTONIC 1962#if EV_USE_MONOTONIC
857 if (expect_true (have_monotonic)) 1963 if (expect_true (have_monotonic))
858 { 1964 {
859 if (time_update_monotonic (EV_A)) 1965 int i;
1966 ev_tstamp odiff = rtmn_diff;
1967
1968 mn_now = get_clock ();
1969
1970 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1971 /* interpolate in the meantime */
1972 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
860 { 1973 {
861 ev_tstamp odiff = rtmn_diff; 1974 ev_rt_now = rtmn_diff + mn_now;
1975 return;
1976 }
862 1977
1978 now_floor = mn_now;
1979 ev_rt_now = ev_time ();
1980
863 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1981 /* loop a few times, before making important decisions.
1982 * on the choice of "4": one iteration isn't enough,
1983 * in case we get preempted during the calls to
1984 * ev_time and get_clock. a second call is almost guaranteed
1985 * to succeed in that case, though. and looping a few more times
1986 * doesn't hurt either as we only do this on time-jumps or
1987 * in the unlikely event of having been preempted here.
1988 */
1989 for (i = 4; --i; )
864 { 1990 {
865 rtmn_diff = rt_now - mn_now; 1991 rtmn_diff = ev_rt_now - mn_now;
866 1992
867 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1993 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
868 return; /* all is well */ 1994 return; /* all is well */
869 1995
870 rt_now = ev_time (); 1996 ev_rt_now = ev_time ();
871 mn_now = get_clock (); 1997 mn_now = get_clock ();
872 now_floor = mn_now; 1998 now_floor = mn_now;
873 } 1999 }
874 2000
2001 /* no timer adjustment, as the monotonic clock doesn't jump */
2002 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2003# if EV_PERIODIC_ENABLE
2004 periodics_reschedule (EV_A);
2005# endif
2006 }
2007 else
2008#endif
2009 {
2010 ev_rt_now = ev_time ();
2011
2012 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2013 {
2014 /* adjust timers. this is easy, as the offset is the same for all of them */
2015 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2016#if EV_PERIODIC_ENABLE
875 periodics_reschedule (EV_A); 2017 periodics_reschedule (EV_A);
876 /* no timer adjustment, as the monotonic clock doesn't jump */ 2018#endif
877 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
878 } 2019 }
879 }
880 else
881#endif
882 {
883 rt_now = ev_time ();
884 2020
885 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
886 {
887 periodics_reschedule (EV_A);
888
889 /* adjust timers. this is easy, as the offset is the same for all */
890 for (i = 0; i < timercnt; ++i)
891 timers [i]->at += rt_now - mn_now;
892 }
893
894 mn_now = rt_now; 2021 mn_now = ev_rt_now;
895 } 2022 }
896}
897
898void
899ev_ref (EV_P)
900{
901 ++activecnt;
902}
903
904void
905ev_unref (EV_P)
906{
907 --activecnt;
908} 2023}
909 2024
910static int loop_done; 2025static int loop_done;
911 2026
912void 2027void
913ev_loop (EV_P_ int flags) 2028ev_loop (EV_P_ int flags)
914{ 2029{
915 double block; 2030 loop_done = EVUNLOOP_CANCEL;
916 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2031
2032 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
917 2033
918 do 2034 do
919 { 2035 {
2036#if EV_VERIFY >= 2
2037 ev_loop_verify (EV_A);
2038#endif
2039
2040#ifndef _WIN32
2041 if (expect_false (curpid)) /* penalise the forking check even more */
2042 if (expect_false (getpid () != curpid))
2043 {
2044 curpid = getpid ();
2045 postfork = 1;
2046 }
2047#endif
2048
2049#if EV_FORK_ENABLE
2050 /* we might have forked, so queue fork handlers */
2051 if (expect_false (postfork))
2052 if (forkcnt)
2053 {
2054 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2055 call_pending (EV_A);
2056 }
2057#endif
2058
920 /* queue check watchers (and execute them) */ 2059 /* queue prepare watchers (and execute them) */
921 if (expect_false (preparecnt)) 2060 if (expect_false (preparecnt))
922 { 2061 {
923 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2062 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
924 call_pending (EV_A); 2063 call_pending (EV_A);
925 } 2064 }
926 2065
2066 /* we might have forked, so reify kernel state if necessary */
2067 if (expect_false (postfork))
2068 loop_fork (EV_A);
2069
927 /* update fd-related kernel structures */ 2070 /* update fd-related kernel structures */
928 fd_reify (EV_A); 2071 fd_reify (EV_A);
929 2072
930 /* calculate blocking time */ 2073 /* calculate blocking time */
2074 {
2075 ev_tstamp waittime = 0.;
2076 ev_tstamp sleeptime = 0.;
931 2077
932 /* we only need this for !monotonic clockor timers, but as we basically 2078 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
933 always have timers, we just calculate it always */
934#if EV_USE_MONOTONIC
935 if (expect_true (have_monotonic))
936 time_update_monotonic (EV_A);
937 else
938#endif
939 { 2079 {
940 rt_now = ev_time (); 2080 /* remember old timestamp for io_blocktime calculation */
941 mn_now = rt_now; 2081 ev_tstamp prev_mn_now = mn_now;
942 }
943 2082
944 if (flags & EVLOOP_NONBLOCK || idlecnt) 2083 /* update time to cancel out callback processing overhead */
945 block = 0.; 2084 time_update (EV_A_ 1e100);
946 else 2085
947 {
948 block = MAX_BLOCKTIME; 2086 waittime = MAX_BLOCKTIME;
949 2087
950 if (timercnt) 2088 if (timercnt)
951 { 2089 {
952 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 2090 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
953 if (block > to) block = to; 2091 if (waittime > to) waittime = to;
954 } 2092 }
955 2093
2094#if EV_PERIODIC_ENABLE
956 if (periodiccnt) 2095 if (periodiccnt)
957 { 2096 {
958 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 2097 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
959 if (block > to) block = to; 2098 if (waittime > to) waittime = to;
960 } 2099 }
2100#endif
961 2101
962 if (block < 0.) block = 0.; 2102 /* don't let timeouts decrease the waittime below timeout_blocktime */
2103 if (expect_false (waittime < timeout_blocktime))
2104 waittime = timeout_blocktime;
2105
2106 /* extra check because io_blocktime is commonly 0 */
2107 if (expect_false (io_blocktime))
2108 {
2109 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2110
2111 if (sleeptime > waittime - backend_fudge)
2112 sleeptime = waittime - backend_fudge;
2113
2114 if (expect_true (sleeptime > 0.))
2115 {
2116 ev_sleep (sleeptime);
2117 waittime -= sleeptime;
2118 }
2119 }
963 } 2120 }
964 2121
965 method_poll (EV_A_ block); 2122 ++loop_count;
2123 backend_poll (EV_A_ waittime);
966 2124
967 /* update rt_now, do magic */ 2125 /* update ev_rt_now, do magic */
968 time_update (EV_A); 2126 time_update (EV_A_ waittime + sleeptime);
2127 }
969 2128
970 /* queue pending timers and reschedule them */ 2129 /* queue pending timers and reschedule them */
971 timers_reify (EV_A); /* relative timers called last */ 2130 timers_reify (EV_A); /* relative timers called last */
2131#if EV_PERIODIC_ENABLE
972 periodics_reify (EV_A); /* absolute timers called first */ 2132 periodics_reify (EV_A); /* absolute timers called first */
2133#endif
973 2134
2135#if EV_IDLE_ENABLE
974 /* queue idle watchers unless io or timers are pending */ 2136 /* queue idle watchers unless other events are pending */
975 if (!pendingcnt) 2137 idle_reify (EV_A);
976 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2138#endif
977 2139
978 /* queue check watchers, to be executed first */ 2140 /* queue check watchers, to be executed first */
979 if (checkcnt) 2141 if (expect_false (checkcnt))
980 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2142 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
981 2143
982 call_pending (EV_A); 2144 call_pending (EV_A);
983 } 2145 }
984 while (activecnt && !loop_done); 2146 while (expect_true (
2147 activecnt
2148 && !loop_done
2149 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2150 ));
985 2151
986 if (loop_done != 2) 2152 if (loop_done == EVUNLOOP_ONE)
987 loop_done = 0; 2153 loop_done = EVUNLOOP_CANCEL;
988} 2154}
989 2155
990void 2156void
991ev_unloop (EV_P_ int how) 2157ev_unloop (EV_P_ int how)
992{ 2158{
993 loop_done = how; 2159 loop_done = how;
994} 2160}
995 2161
2162void
2163ev_ref (EV_P)
2164{
2165 ++activecnt;
2166}
2167
2168void
2169ev_unref (EV_P)
2170{
2171 --activecnt;
2172}
2173
2174void
2175ev_now_update (EV_P)
2176{
2177 time_update (EV_A_ 1e100);
2178}
2179
2180void
2181ev_suspend (EV_P)
2182{
2183 ev_now_update (EV_A);
2184}
2185
2186void
2187ev_resume (EV_P)
2188{
2189 ev_tstamp mn_prev = mn_now;
2190
2191 ev_now_update (EV_A);
2192 timers_reschedule (EV_A_ mn_now - mn_prev);
2193#if EV_PERIODIC_ENABLE
2194 /* TODO: really do this? */
2195 periodics_reschedule (EV_A);
2196#endif
2197}
2198
996/*****************************************************************************/ 2199/*****************************************************************************/
2200/* singly-linked list management, used when the expected list length is short */
997 2201
998inline void 2202inline_size void
999wlist_add (WL *head, WL elem) 2203wlist_add (WL *head, WL elem)
1000{ 2204{
1001 elem->next = *head; 2205 elem->next = *head;
1002 *head = elem; 2206 *head = elem;
1003} 2207}
1004 2208
1005inline void 2209inline_size void
1006wlist_del (WL *head, WL elem) 2210wlist_del (WL *head, WL elem)
1007{ 2211{
1008 while (*head) 2212 while (*head)
1009 { 2213 {
1010 if (*head == elem) 2214 if (*head == elem)
… …
1015 2219
1016 head = &(*head)->next; 2220 head = &(*head)->next;
1017 } 2221 }
1018} 2222}
1019 2223
2224/* internal, faster, version of ev_clear_pending */
1020inline void 2225inline_speed void
1021ev_clear_pending (EV_P_ W w) 2226clear_pending (EV_P_ W w)
1022{ 2227{
1023 if (w->pending) 2228 if (w->pending)
1024 { 2229 {
1025 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2230 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1026 w->pending = 0; 2231 w->pending = 0;
1027 } 2232 }
1028} 2233}
1029 2234
2235int
2236ev_clear_pending (EV_P_ void *w)
2237{
2238 W w_ = (W)w;
2239 int pending = w_->pending;
2240
2241 if (expect_true (pending))
2242 {
2243 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2244 p->w = (W)&pending_w;
2245 w_->pending = 0;
2246 return p->events;
2247 }
2248 else
2249 return 0;
2250}
2251
1030inline void 2252inline_size void
2253pri_adjust (EV_P_ W w)
2254{
2255 int pri = w->priority;
2256 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2257 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2258 w->priority = pri;
2259}
2260
2261inline_speed void
1031ev_start (EV_P_ W w, int active) 2262ev_start (EV_P_ W w, int active)
1032{ 2263{
1033 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2264 pri_adjust (EV_A_ w);
1034 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1035
1036 w->active = active; 2265 w->active = active;
1037 ev_ref (EV_A); 2266 ev_ref (EV_A);
1038} 2267}
1039 2268
1040inline void 2269inline_size void
1041ev_stop (EV_P_ W w) 2270ev_stop (EV_P_ W w)
1042{ 2271{
1043 ev_unref (EV_A); 2272 ev_unref (EV_A);
1044 w->active = 0; 2273 w->active = 0;
1045} 2274}
1046 2275
1047/*****************************************************************************/ 2276/*****************************************************************************/
1048 2277
1049void 2278void noinline
1050ev_io_start (EV_P_ struct ev_io *w) 2279ev_io_start (EV_P_ ev_io *w)
1051{ 2280{
1052 int fd = w->fd; 2281 int fd = w->fd;
1053 2282
1054 if (ev_is_active (w)) 2283 if (expect_false (ev_is_active (w)))
1055 return; 2284 return;
1056 2285
1057 assert (("ev_io_start called with negative fd", fd >= 0)); 2286 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2287 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2288
2289 EV_FREQUENT_CHECK;
1058 2290
1059 ev_start (EV_A_ (W)w, 1); 2291 ev_start (EV_A_ (W)w, 1);
1060 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2292 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1061 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2293 wlist_add (&anfds[fd].head, (WL)w);
1062 2294
1063 fd_change (EV_A_ fd); 2295 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1064} 2296 w->events &= ~EV__IOFDSET;
1065 2297
1066void 2298 EV_FREQUENT_CHECK;
2299}
2300
2301void noinline
1067ev_io_stop (EV_P_ struct ev_io *w) 2302ev_io_stop (EV_P_ ev_io *w)
1068{ 2303{
1069 ev_clear_pending (EV_A_ (W)w); 2304 clear_pending (EV_A_ (W)w);
1070 if (!ev_is_active (w)) 2305 if (expect_false (!ev_is_active (w)))
1071 return; 2306 return;
1072 2307
2308 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2309
2310 EV_FREQUENT_CHECK;
2311
1073 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2312 wlist_del (&anfds[w->fd].head, (WL)w);
1074 ev_stop (EV_A_ (W)w); 2313 ev_stop (EV_A_ (W)w);
1075 2314
1076 fd_change (EV_A_ w->fd); 2315 fd_change (EV_A_ w->fd, 1);
1077}
1078 2316
1079void 2317 EV_FREQUENT_CHECK;
2318}
2319
2320void noinline
1080ev_timer_start (EV_P_ struct ev_timer *w) 2321ev_timer_start (EV_P_ ev_timer *w)
1081{ 2322{
1082 if (ev_is_active (w)) 2323 if (expect_false (ev_is_active (w)))
1083 return; 2324 return;
1084 2325
1085 w->at += mn_now; 2326 ev_at (w) += mn_now;
1086 2327
1087 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2328 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1088 2329
2330 EV_FREQUENT_CHECK;
2331
2332 ++timercnt;
1089 ev_start (EV_A_ (W)w, ++timercnt); 2333 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1090 array_needsize (timers, timermax, timercnt, ); 2334 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1091 timers [timercnt - 1] = w; 2335 ANHE_w (timers [ev_active (w)]) = (WT)w;
1092 upheap ((WT *)timers, timercnt - 1); 2336 ANHE_at_cache (timers [ev_active (w)]);
1093} 2337 upheap (timers, ev_active (w));
1094 2338
1095void 2339 EV_FREQUENT_CHECK;
2340
2341 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2342}
2343
2344void noinline
1096ev_timer_stop (EV_P_ struct ev_timer *w) 2345ev_timer_stop (EV_P_ ev_timer *w)
1097{ 2346{
1098 ev_clear_pending (EV_A_ (W)w); 2347 clear_pending (EV_A_ (W)w);
1099 if (!ev_is_active (w)) 2348 if (expect_false (!ev_is_active (w)))
1100 return; 2349 return;
1101 2350
1102 if (w->active < timercnt--) 2351 EV_FREQUENT_CHECK;
2352
2353 {
2354 int active = ev_active (w);
2355
2356 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2357
2358 --timercnt;
2359
2360 if (expect_true (active < timercnt + HEAP0))
1103 { 2361 {
1104 timers [w->active - 1] = timers [timercnt]; 2362 timers [active] = timers [timercnt + HEAP0];
1105 downheap ((WT *)timers, timercnt, w->active - 1); 2363 adjustheap (timers, timercnt, active);
1106 } 2364 }
2365 }
1107 2366
1108 w->at = w->repeat; 2367 EV_FREQUENT_CHECK;
2368
2369 ev_at (w) -= mn_now;
1109 2370
1110 ev_stop (EV_A_ (W)w); 2371 ev_stop (EV_A_ (W)w);
1111} 2372}
1112 2373
1113void 2374void noinline
1114ev_timer_again (EV_P_ struct ev_timer *w) 2375ev_timer_again (EV_P_ ev_timer *w)
1115{ 2376{
2377 EV_FREQUENT_CHECK;
2378
1116 if (ev_is_active (w)) 2379 if (ev_is_active (w))
1117 { 2380 {
1118 if (w->repeat) 2381 if (w->repeat)
1119 { 2382 {
1120 w->at = mn_now + w->repeat; 2383 ev_at (w) = mn_now + w->repeat;
2384 ANHE_at_cache (timers [ev_active (w)]);
1121 downheap ((WT *)timers, timercnt, w->active - 1); 2385 adjustheap (timers, timercnt, ev_active (w));
1122 } 2386 }
1123 else 2387 else
1124 ev_timer_stop (EV_A_ w); 2388 ev_timer_stop (EV_A_ w);
1125 } 2389 }
1126 else if (w->repeat) 2390 else if (w->repeat)
2391 {
2392 ev_at (w) = w->repeat;
1127 ev_timer_start (EV_A_ w); 2393 ev_timer_start (EV_A_ w);
1128} 2394 }
1129 2395
1130void 2396 EV_FREQUENT_CHECK;
2397}
2398
2399#if EV_PERIODIC_ENABLE
2400void noinline
1131ev_periodic_start (EV_P_ struct ev_periodic *w) 2401ev_periodic_start (EV_P_ ev_periodic *w)
1132{ 2402{
1133 if (ev_is_active (w)) 2403 if (expect_false (ev_is_active (w)))
1134 return; 2404 return;
1135 2405
2406 if (w->reschedule_cb)
2407 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2408 else if (w->interval)
2409 {
1136 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2410 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1137
1138 /* this formula differs from the one in periodic_reify because we do not always round up */ 2411 /* this formula differs from the one in periodic_reify because we do not always round up */
1139 if (w->interval)
1140 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 2412 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2413 }
2414 else
2415 ev_at (w) = w->offset;
1141 2416
2417 EV_FREQUENT_CHECK;
2418
2419 ++periodiccnt;
1142 ev_start (EV_A_ (W)w, ++periodiccnt); 2420 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1143 array_needsize (periodics, periodicmax, periodiccnt, ); 2421 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1144 periodics [periodiccnt - 1] = w; 2422 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1145 upheap ((WT *)periodics, periodiccnt - 1); 2423 ANHE_at_cache (periodics [ev_active (w)]);
1146} 2424 upheap (periodics, ev_active (w));
1147 2425
1148void 2426 EV_FREQUENT_CHECK;
2427
2428 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2429}
2430
2431void noinline
1149ev_periodic_stop (EV_P_ struct ev_periodic *w) 2432ev_periodic_stop (EV_P_ ev_periodic *w)
1150{ 2433{
1151 ev_clear_pending (EV_A_ (W)w); 2434 clear_pending (EV_A_ (W)w);
1152 if (!ev_is_active (w)) 2435 if (expect_false (!ev_is_active (w)))
1153 return; 2436 return;
1154 2437
1155 if (w->active < periodiccnt--) 2438 EV_FREQUENT_CHECK;
2439
2440 {
2441 int active = ev_active (w);
2442
2443 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2444
2445 --periodiccnt;
2446
2447 if (expect_true (active < periodiccnt + HEAP0))
1156 { 2448 {
1157 periodics [w->active - 1] = periodics [periodiccnt]; 2449 periodics [active] = periodics [periodiccnt + HEAP0];
1158 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2450 adjustheap (periodics, periodiccnt, active);
1159 } 2451 }
2452 }
2453
2454 EV_FREQUENT_CHECK;
1160 2455
1161 ev_stop (EV_A_ (W)w); 2456 ev_stop (EV_A_ (W)w);
1162} 2457}
1163 2458
1164void 2459void noinline
1165ev_idle_start (EV_P_ struct ev_idle *w) 2460ev_periodic_again (EV_P_ ev_periodic *w)
1166{ 2461{
1167 if (ev_is_active (w)) 2462 /* TODO: use adjustheap and recalculation */
1168 return;
1169
1170 ev_start (EV_A_ (W)w, ++idlecnt);
1171 array_needsize (idles, idlemax, idlecnt, );
1172 idles [idlecnt - 1] = w;
1173}
1174
1175void
1176ev_idle_stop (EV_P_ struct ev_idle *w)
1177{
1178 ev_clear_pending (EV_A_ (W)w);
1179 if (ev_is_active (w))
1180 return;
1181
1182 idles [w->active - 1] = idles [--idlecnt];
1183 ev_stop (EV_A_ (W)w); 2463 ev_periodic_stop (EV_A_ w);
2464 ev_periodic_start (EV_A_ w);
1184} 2465}
1185 2466#endif
1186void
1187ev_prepare_start (EV_P_ struct ev_prepare *w)
1188{
1189 if (ev_is_active (w))
1190 return;
1191
1192 ev_start (EV_A_ (W)w, ++preparecnt);
1193 array_needsize (prepares, preparemax, preparecnt, );
1194 prepares [preparecnt - 1] = w;
1195}
1196
1197void
1198ev_prepare_stop (EV_P_ struct ev_prepare *w)
1199{
1200 ev_clear_pending (EV_A_ (W)w);
1201 if (ev_is_active (w))
1202 return;
1203
1204 prepares [w->active - 1] = prepares [--preparecnt];
1205 ev_stop (EV_A_ (W)w);
1206}
1207
1208void
1209ev_check_start (EV_P_ struct ev_check *w)
1210{
1211 if (ev_is_active (w))
1212 return;
1213
1214 ev_start (EV_A_ (W)w, ++checkcnt);
1215 array_needsize (checks, checkmax, checkcnt, );
1216 checks [checkcnt - 1] = w;
1217}
1218
1219void
1220ev_check_stop (EV_P_ struct ev_check *w)
1221{
1222 ev_clear_pending (EV_A_ (W)w);
1223 if (ev_is_active (w))
1224 return;
1225
1226 checks [w->active - 1] = checks [--checkcnt];
1227 ev_stop (EV_A_ (W)w);
1228}
1229 2467
1230#ifndef SA_RESTART 2468#ifndef SA_RESTART
1231# define SA_RESTART 0 2469# define SA_RESTART 0
1232#endif 2470#endif
1233 2471
1234void 2472void noinline
1235ev_signal_start (EV_P_ struct ev_signal *w) 2473ev_signal_start (EV_P_ ev_signal *w)
1236{ 2474{
1237#if EV_MULTIPLICITY 2475#if EV_MULTIPLICITY
1238 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2476 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1239#endif 2477#endif
1240 if (ev_is_active (w)) 2478 if (expect_false (ev_is_active (w)))
1241 return; 2479 return;
1242 2480
1243 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2481 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2482
2483 evpipe_init (EV_A);
2484
2485 EV_FREQUENT_CHECK;
2486
2487 {
2488#ifndef _WIN32
2489 sigset_t full, prev;
2490 sigfillset (&full);
2491 sigprocmask (SIG_SETMASK, &full, &prev);
2492#endif
2493
2494 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2495
2496#ifndef _WIN32
2497 sigprocmask (SIG_SETMASK, &prev, 0);
2498#endif
2499 }
1244 2500
1245 ev_start (EV_A_ (W)w, 1); 2501 ev_start (EV_A_ (W)w, 1);
1246 array_needsize (signals, signalmax, w->signum, signals_init);
1247 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2502 wlist_add (&signals [w->signum - 1].head, (WL)w);
1248 2503
1249 if (!w->next) 2504 if (!((WL)w)->next)
1250 { 2505 {
2506#if _WIN32
2507 signal (w->signum, ev_sighandler);
2508#else
1251 struct sigaction sa; 2509 struct sigaction sa;
1252 sa.sa_handler = sighandler; 2510 sa.sa_handler = ev_sighandler;
1253 sigfillset (&sa.sa_mask); 2511 sigfillset (&sa.sa_mask);
1254 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2512 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1255 sigaction (w->signum, &sa, 0); 2513 sigaction (w->signum, &sa, 0);
2514#endif
1256 } 2515 }
1257}
1258 2516
1259void 2517 EV_FREQUENT_CHECK;
2518}
2519
2520void noinline
1260ev_signal_stop (EV_P_ struct ev_signal *w) 2521ev_signal_stop (EV_P_ ev_signal *w)
1261{ 2522{
1262 ev_clear_pending (EV_A_ (W)w); 2523 clear_pending (EV_A_ (W)w);
1263 if (!ev_is_active (w)) 2524 if (expect_false (!ev_is_active (w)))
1264 return; 2525 return;
1265 2526
2527 EV_FREQUENT_CHECK;
2528
1266 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2529 wlist_del (&signals [w->signum - 1].head, (WL)w);
1267 ev_stop (EV_A_ (W)w); 2530 ev_stop (EV_A_ (W)w);
1268 2531
1269 if (!signals [w->signum - 1].head) 2532 if (!signals [w->signum - 1].head)
1270 signal (w->signum, SIG_DFL); 2533 signal (w->signum, SIG_DFL);
1271}
1272 2534
2535 EV_FREQUENT_CHECK;
2536}
2537
1273void 2538void
1274ev_child_start (EV_P_ struct ev_child *w) 2539ev_child_start (EV_P_ ev_child *w)
1275{ 2540{
1276#if EV_MULTIPLICITY 2541#if EV_MULTIPLICITY
1277 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2542 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1278#endif 2543#endif
1279 if (ev_is_active (w)) 2544 if (expect_false (ev_is_active (w)))
1280 return; 2545 return;
1281 2546
2547 EV_FREQUENT_CHECK;
2548
1282 ev_start (EV_A_ (W)w, 1); 2549 ev_start (EV_A_ (W)w, 1);
1283 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2550 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1284}
1285 2551
2552 EV_FREQUENT_CHECK;
2553}
2554
1286void 2555void
1287ev_child_stop (EV_P_ struct ev_child *w) 2556ev_child_stop (EV_P_ ev_child *w)
1288{ 2557{
1289 ev_clear_pending (EV_A_ (W)w); 2558 clear_pending (EV_A_ (W)w);
1290 if (ev_is_active (w)) 2559 if (expect_false (!ev_is_active (w)))
1291 return; 2560 return;
1292 2561
2562 EV_FREQUENT_CHECK;
2563
1293 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2564 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1294 ev_stop (EV_A_ (W)w); 2565 ev_stop (EV_A_ (W)w);
2566
2567 EV_FREQUENT_CHECK;
1295} 2568}
2569
2570#if EV_STAT_ENABLE
2571
2572# ifdef _WIN32
2573# undef lstat
2574# define lstat(a,b) _stati64 (a,b)
2575# endif
2576
2577#define DEF_STAT_INTERVAL 5.0074891
2578#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2579#define MIN_STAT_INTERVAL 0.1074891
2580
2581static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2582
2583#if EV_USE_INOTIFY
2584# define EV_INOTIFY_BUFSIZE 8192
2585
2586static void noinline
2587infy_add (EV_P_ ev_stat *w)
2588{
2589 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);
2590
2591 if (w->wd < 0)
2592 {
2593 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2594 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2595
2596 /* monitor some parent directory for speedup hints */
2597 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2598 /* but an efficiency issue only */
2599 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2600 {
2601 char path [4096];
2602 strcpy (path, w->path);
2603
2604 do
2605 {
2606 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2607 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2608
2609 char *pend = strrchr (path, '/');
2610
2611 if (!pend || pend == path)
2612 break;
2613
2614 *pend = 0;
2615 w->wd = inotify_add_watch (fs_fd, path, mask);
2616 }
2617 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2618 }
2619 }
2620
2621 if (w->wd >= 0)
2622 {
2623 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2624
2625 /* now local changes will be tracked by inotify, but remote changes won't */
2626 /* unless the filesystem it known to be local, we therefore still poll */
2627 /* also do poll on <2.6.25, but with normal frequency */
2628 struct statfs sfs;
2629
2630 if (fs_2625 && !statfs (w->path, &sfs))
2631 if (sfs.f_type == 0x1373 /* devfs */
2632 || sfs.f_type == 0xEF53 /* ext2/3 */
2633 || sfs.f_type == 0x3153464a /* jfs */
2634 || sfs.f_type == 0x52654973 /* reiser3 */
2635 || sfs.f_type == 0x01021994 /* tempfs */
2636 || sfs.f_type == 0x58465342 /* xfs */)
2637 return;
2638
2639 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2640 ev_timer_again (EV_A_ &w->timer);
2641 }
2642}
2643
2644static void noinline
2645infy_del (EV_P_ ev_stat *w)
2646{
2647 int slot;
2648 int wd = w->wd;
2649
2650 if (wd < 0)
2651 return;
2652
2653 w->wd = -2;
2654 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2655 wlist_del (&fs_hash [slot].head, (WL)w);
2656
2657 /* remove this watcher, if others are watching it, they will rearm */
2658 inotify_rm_watch (fs_fd, wd);
2659}
2660
2661static void noinline
2662infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2663{
2664 if (slot < 0)
2665 /* overflow, need to check for all hash slots */
2666 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2667 infy_wd (EV_A_ slot, wd, ev);
2668 else
2669 {
2670 WL w_;
2671
2672 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2673 {
2674 ev_stat *w = (ev_stat *)w_;
2675 w_ = w_->next; /* lets us remove this watcher and all before it */
2676
2677 if (w->wd == wd || wd == -1)
2678 {
2679 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2680 {
2681 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2682 w->wd = -1;
2683 infy_add (EV_A_ w); /* re-add, no matter what */
2684 }
2685
2686 stat_timer_cb (EV_A_ &w->timer, 0);
2687 }
2688 }
2689 }
2690}
2691
2692static void
2693infy_cb (EV_P_ ev_io *w, int revents)
2694{
2695 char buf [EV_INOTIFY_BUFSIZE];
2696 struct inotify_event *ev = (struct inotify_event *)buf;
2697 int ofs;
2698 int len = read (fs_fd, buf, sizeof (buf));
2699
2700 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2701 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2702}
2703
2704inline_size void
2705check_2625 (EV_P)
2706{
2707 /* kernels < 2.6.25 are borked
2708 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2709 */
2710 struct utsname buf;
2711 int major, minor, micro;
2712
2713 if (uname (&buf))
2714 return;
2715
2716 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2717 return;
2718
2719 if (major < 2
2720 || (major == 2 && minor < 6)
2721 || (major == 2 && minor == 6 && micro < 25))
2722 return;
2723
2724 fs_2625 = 1;
2725}
2726
2727inline_size void
2728infy_init (EV_P)
2729{
2730 if (fs_fd != -2)
2731 return;
2732
2733 fs_fd = -1;
2734
2735 check_2625 (EV_A);
2736
2737 fs_fd = inotify_init ();
2738
2739 if (fs_fd >= 0)
2740 {
2741 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2742 ev_set_priority (&fs_w, EV_MAXPRI);
2743 ev_io_start (EV_A_ &fs_w);
2744 }
2745}
2746
2747inline_size void
2748infy_fork (EV_P)
2749{
2750 int slot;
2751
2752 if (fs_fd < 0)
2753 return;
2754
2755 close (fs_fd);
2756 fs_fd = inotify_init ();
2757
2758 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2759 {
2760 WL w_ = fs_hash [slot].head;
2761 fs_hash [slot].head = 0;
2762
2763 while (w_)
2764 {
2765 ev_stat *w = (ev_stat *)w_;
2766 w_ = w_->next; /* lets us add this watcher */
2767
2768 w->wd = -1;
2769
2770 if (fs_fd >= 0)
2771 infy_add (EV_A_ w); /* re-add, no matter what */
2772 else
2773 ev_timer_again (EV_A_ &w->timer);
2774 }
2775 }
2776}
2777
2778#endif
2779
2780#ifdef _WIN32
2781# define EV_LSTAT(p,b) _stati64 (p, b)
2782#else
2783# define EV_LSTAT(p,b) lstat (p, b)
2784#endif
2785
2786void
2787ev_stat_stat (EV_P_ ev_stat *w)
2788{
2789 if (lstat (w->path, &w->attr) < 0)
2790 w->attr.st_nlink = 0;
2791 else if (!w->attr.st_nlink)
2792 w->attr.st_nlink = 1;
2793}
2794
2795static void noinline
2796stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2797{
2798 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2799
2800 /* we copy this here each the time so that */
2801 /* prev has the old value when the callback gets invoked */
2802 w->prev = w->attr;
2803 ev_stat_stat (EV_A_ w);
2804
2805 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2806 if (
2807 w->prev.st_dev != w->attr.st_dev
2808 || w->prev.st_ino != w->attr.st_ino
2809 || w->prev.st_mode != w->attr.st_mode
2810 || w->prev.st_nlink != w->attr.st_nlink
2811 || w->prev.st_uid != w->attr.st_uid
2812 || w->prev.st_gid != w->attr.st_gid
2813 || w->prev.st_rdev != w->attr.st_rdev
2814 || w->prev.st_size != w->attr.st_size
2815 || w->prev.st_atime != w->attr.st_atime
2816 || w->prev.st_mtime != w->attr.st_mtime
2817 || w->prev.st_ctime != w->attr.st_ctime
2818 ) {
2819 #if EV_USE_INOTIFY
2820 if (fs_fd >= 0)
2821 {
2822 infy_del (EV_A_ w);
2823 infy_add (EV_A_ w);
2824 ev_stat_stat (EV_A_ w); /* avoid race... */
2825 }
2826 #endif
2827
2828 ev_feed_event (EV_A_ w, EV_STAT);
2829 }
2830}
2831
2832void
2833ev_stat_start (EV_P_ ev_stat *w)
2834{
2835 if (expect_false (ev_is_active (w)))
2836 return;
2837
2838 ev_stat_stat (EV_A_ w);
2839
2840 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2841 w->interval = MIN_STAT_INTERVAL;
2842
2843 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2844 ev_set_priority (&w->timer, ev_priority (w));
2845
2846#if EV_USE_INOTIFY
2847 infy_init (EV_A);
2848
2849 if (fs_fd >= 0)
2850 infy_add (EV_A_ w);
2851 else
2852#endif
2853 ev_timer_again (EV_A_ &w->timer);
2854
2855 ev_start (EV_A_ (W)w, 1);
2856
2857 EV_FREQUENT_CHECK;
2858}
2859
2860void
2861ev_stat_stop (EV_P_ ev_stat *w)
2862{
2863 clear_pending (EV_A_ (W)w);
2864 if (expect_false (!ev_is_active (w)))
2865 return;
2866
2867 EV_FREQUENT_CHECK;
2868
2869#if EV_USE_INOTIFY
2870 infy_del (EV_A_ w);
2871#endif
2872 ev_timer_stop (EV_A_ &w->timer);
2873
2874 ev_stop (EV_A_ (W)w);
2875
2876 EV_FREQUENT_CHECK;
2877}
2878#endif
2879
2880#if EV_IDLE_ENABLE
2881void
2882ev_idle_start (EV_P_ ev_idle *w)
2883{
2884 if (expect_false (ev_is_active (w)))
2885 return;
2886
2887 pri_adjust (EV_A_ (W)w);
2888
2889 EV_FREQUENT_CHECK;
2890
2891 {
2892 int active = ++idlecnt [ABSPRI (w)];
2893
2894 ++idleall;
2895 ev_start (EV_A_ (W)w, active);
2896
2897 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2898 idles [ABSPRI (w)][active - 1] = w;
2899 }
2900
2901 EV_FREQUENT_CHECK;
2902}
2903
2904void
2905ev_idle_stop (EV_P_ ev_idle *w)
2906{
2907 clear_pending (EV_A_ (W)w);
2908 if (expect_false (!ev_is_active (w)))
2909 return;
2910
2911 EV_FREQUENT_CHECK;
2912
2913 {
2914 int active = ev_active (w);
2915
2916 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2917 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2918
2919 ev_stop (EV_A_ (W)w);
2920 --idleall;
2921 }
2922
2923 EV_FREQUENT_CHECK;
2924}
2925#endif
2926
2927void
2928ev_prepare_start (EV_P_ ev_prepare *w)
2929{
2930 if (expect_false (ev_is_active (w)))
2931 return;
2932
2933 EV_FREQUENT_CHECK;
2934
2935 ev_start (EV_A_ (W)w, ++preparecnt);
2936 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2937 prepares [preparecnt - 1] = w;
2938
2939 EV_FREQUENT_CHECK;
2940}
2941
2942void
2943ev_prepare_stop (EV_P_ ev_prepare *w)
2944{
2945 clear_pending (EV_A_ (W)w);
2946 if (expect_false (!ev_is_active (w)))
2947 return;
2948
2949 EV_FREQUENT_CHECK;
2950
2951 {
2952 int active = ev_active (w);
2953
2954 prepares [active - 1] = prepares [--preparecnt];
2955 ev_active (prepares [active - 1]) = active;
2956 }
2957
2958 ev_stop (EV_A_ (W)w);
2959
2960 EV_FREQUENT_CHECK;
2961}
2962
2963void
2964ev_check_start (EV_P_ ev_check *w)
2965{
2966 if (expect_false (ev_is_active (w)))
2967 return;
2968
2969 EV_FREQUENT_CHECK;
2970
2971 ev_start (EV_A_ (W)w, ++checkcnt);
2972 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2973 checks [checkcnt - 1] = w;
2974
2975 EV_FREQUENT_CHECK;
2976}
2977
2978void
2979ev_check_stop (EV_P_ ev_check *w)
2980{
2981 clear_pending (EV_A_ (W)w);
2982 if (expect_false (!ev_is_active (w)))
2983 return;
2984
2985 EV_FREQUENT_CHECK;
2986
2987 {
2988 int active = ev_active (w);
2989
2990 checks [active - 1] = checks [--checkcnt];
2991 ev_active (checks [active - 1]) = active;
2992 }
2993
2994 ev_stop (EV_A_ (W)w);
2995
2996 EV_FREQUENT_CHECK;
2997}
2998
2999#if EV_EMBED_ENABLE
3000void noinline
3001ev_embed_sweep (EV_P_ ev_embed *w)
3002{
3003 ev_loop (w->other, EVLOOP_NONBLOCK);
3004}
3005
3006static void
3007embed_io_cb (EV_P_ ev_io *io, int revents)
3008{
3009 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3010
3011 if (ev_cb (w))
3012 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3013 else
3014 ev_loop (w->other, EVLOOP_NONBLOCK);
3015}
3016
3017static void
3018embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3019{
3020 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3021
3022 {
3023 struct ev_loop *loop = w->other;
3024
3025 while (fdchangecnt)
3026 {
3027 fd_reify (EV_A);
3028 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3029 }
3030 }
3031}
3032
3033static void
3034embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3035{
3036 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3037
3038 ev_embed_stop (EV_A_ w);
3039
3040 {
3041 struct ev_loop *loop = w->other;
3042
3043 ev_loop_fork (EV_A);
3044 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3045 }
3046
3047 ev_embed_start (EV_A_ w);
3048}
3049
3050#if 0
3051static void
3052embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3053{
3054 ev_idle_stop (EV_A_ idle);
3055}
3056#endif
3057
3058void
3059ev_embed_start (EV_P_ ev_embed *w)
3060{
3061 if (expect_false (ev_is_active (w)))
3062 return;
3063
3064 {
3065 struct ev_loop *loop = w->other;
3066 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3067 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3068 }
3069
3070 EV_FREQUENT_CHECK;
3071
3072 ev_set_priority (&w->io, ev_priority (w));
3073 ev_io_start (EV_A_ &w->io);
3074
3075 ev_prepare_init (&w->prepare, embed_prepare_cb);
3076 ev_set_priority (&w->prepare, EV_MINPRI);
3077 ev_prepare_start (EV_A_ &w->prepare);
3078
3079 ev_fork_init (&w->fork, embed_fork_cb);
3080 ev_fork_start (EV_A_ &w->fork);
3081
3082 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3083
3084 ev_start (EV_A_ (W)w, 1);
3085
3086 EV_FREQUENT_CHECK;
3087}
3088
3089void
3090ev_embed_stop (EV_P_ ev_embed *w)
3091{
3092 clear_pending (EV_A_ (W)w);
3093 if (expect_false (!ev_is_active (w)))
3094 return;
3095
3096 EV_FREQUENT_CHECK;
3097
3098 ev_io_stop (EV_A_ &w->io);
3099 ev_prepare_stop (EV_A_ &w->prepare);
3100 ev_fork_stop (EV_A_ &w->fork);
3101
3102 EV_FREQUENT_CHECK;
3103}
3104#endif
3105
3106#if EV_FORK_ENABLE
3107void
3108ev_fork_start (EV_P_ ev_fork *w)
3109{
3110 if (expect_false (ev_is_active (w)))
3111 return;
3112
3113 EV_FREQUENT_CHECK;
3114
3115 ev_start (EV_A_ (W)w, ++forkcnt);
3116 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3117 forks [forkcnt - 1] = w;
3118
3119 EV_FREQUENT_CHECK;
3120}
3121
3122void
3123ev_fork_stop (EV_P_ ev_fork *w)
3124{
3125 clear_pending (EV_A_ (W)w);
3126 if (expect_false (!ev_is_active (w)))
3127 return;
3128
3129 EV_FREQUENT_CHECK;
3130
3131 {
3132 int active = ev_active (w);
3133
3134 forks [active - 1] = forks [--forkcnt];
3135 ev_active (forks [active - 1]) = active;
3136 }
3137
3138 ev_stop (EV_A_ (W)w);
3139
3140 EV_FREQUENT_CHECK;
3141}
3142#endif
3143
3144#if EV_ASYNC_ENABLE
3145void
3146ev_async_start (EV_P_ ev_async *w)
3147{
3148 if (expect_false (ev_is_active (w)))
3149 return;
3150
3151 evpipe_init (EV_A);
3152
3153 EV_FREQUENT_CHECK;
3154
3155 ev_start (EV_A_ (W)w, ++asynccnt);
3156 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3157 asyncs [asynccnt - 1] = w;
3158
3159 EV_FREQUENT_CHECK;
3160}
3161
3162void
3163ev_async_stop (EV_P_ ev_async *w)
3164{
3165 clear_pending (EV_A_ (W)w);
3166 if (expect_false (!ev_is_active (w)))
3167 return;
3168
3169 EV_FREQUENT_CHECK;
3170
3171 {
3172 int active = ev_active (w);
3173
3174 asyncs [active - 1] = asyncs [--asynccnt];
3175 ev_active (asyncs [active - 1]) = active;
3176 }
3177
3178 ev_stop (EV_A_ (W)w);
3179
3180 EV_FREQUENT_CHECK;
3181}
3182
3183void
3184ev_async_send (EV_P_ ev_async *w)
3185{
3186 w->sent = 1;
3187 evpipe_write (EV_A_ &gotasync);
3188}
3189#endif
1296 3190
1297/*****************************************************************************/ 3191/*****************************************************************************/
1298 3192
1299struct ev_once 3193struct ev_once
1300{ 3194{
1301 struct ev_io io; 3195 ev_io io;
1302 struct ev_timer to; 3196 ev_timer to;
1303 void (*cb)(int revents, void *arg); 3197 void (*cb)(int revents, void *arg);
1304 void *arg; 3198 void *arg;
1305}; 3199};
1306 3200
1307static void 3201static void
1308once_cb (EV_P_ struct ev_once *once, int revents) 3202once_cb (EV_P_ struct ev_once *once, int revents)
1309{ 3203{
1310 void (*cb)(int revents, void *arg) = once->cb; 3204 void (*cb)(int revents, void *arg) = once->cb;
1311 void *arg = once->arg; 3205 void *arg = once->arg;
1312 3206
1313 ev_io_stop (EV_A_ &once->io); 3207 ev_io_stop (EV_A_ &once->io);
1314 ev_timer_stop (EV_A_ &once->to); 3208 ev_timer_stop (EV_A_ &once->to);
1315 free (once); 3209 ev_free (once);
1316 3210
1317 cb (revents, arg); 3211 cb (revents, arg);
1318} 3212}
1319 3213
1320static void 3214static void
1321once_cb_io (EV_P_ struct ev_io *w, int revents) 3215once_cb_io (EV_P_ ev_io *w, int revents)
1322{ 3216{
1323 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3217 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3218
3219 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1324} 3220}
1325 3221
1326static void 3222static void
1327once_cb_to (EV_P_ struct ev_timer *w, int revents) 3223once_cb_to (EV_P_ ev_timer *w, int revents)
1328{ 3224{
1329 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3225 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3226
3227 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1330} 3228}
1331 3229
1332void 3230void
1333ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3231ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1334{ 3232{
1335 struct ev_once *once = malloc (sizeof (struct ev_once)); 3233 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1336 3234
1337 if (!once) 3235 if (expect_false (!once))
3236 {
1338 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3237 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1339 else 3238 return;
1340 { 3239 }
3240
1341 once->cb = cb; 3241 once->cb = cb;
1342 once->arg = arg; 3242 once->arg = arg;
1343 3243
1344 ev_watcher_init (&once->io, once_cb_io); 3244 ev_init (&once->io, once_cb_io);
1345 if (fd >= 0) 3245 if (fd >= 0)
3246 {
3247 ev_io_set (&once->io, fd, events);
3248 ev_io_start (EV_A_ &once->io);
3249 }
3250
3251 ev_init (&once->to, once_cb_to);
3252 if (timeout >= 0.)
3253 {
3254 ev_timer_set (&once->to, timeout, 0.);
3255 ev_timer_start (EV_A_ &once->to);
3256 }
3257}
3258
3259/*****************************************************************************/
3260
3261#if EV_WALK_ENABLE
3262void
3263ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3264{
3265 int i, j;
3266 ev_watcher_list *wl, *wn;
3267
3268 if (types & (EV_IO | EV_EMBED))
3269 for (i = 0; i < anfdmax; ++i)
3270 for (wl = anfds [i].head; wl; )
1346 { 3271 {
1347 ev_io_set (&once->io, fd, events); 3272 wn = wl->next;
1348 ev_io_start (EV_A_ &once->io); 3273
3274#if EV_EMBED_ENABLE
3275 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3276 {
3277 if (types & EV_EMBED)
3278 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3279 }
3280 else
3281#endif
3282#if EV_USE_INOTIFY
3283 if (ev_cb ((ev_io *)wl) == infy_cb)
3284 ;
3285 else
3286#endif
3287 if ((ev_io *)wl != &pipe_w)
3288 if (types & EV_IO)
3289 cb (EV_A_ EV_IO, wl);
3290
3291 wl = wn;
1349 } 3292 }
1350 3293
1351 ev_watcher_init (&once->to, once_cb_to); 3294 if (types & (EV_TIMER | EV_STAT))
1352 if (timeout >= 0.) 3295 for (i = timercnt + HEAP0; i-- > HEAP0; )
3296#if EV_STAT_ENABLE
3297 /*TODO: timer is not always active*/
3298 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1353 { 3299 {
1354 ev_timer_set (&once->to, timeout, 0.); 3300 if (types & EV_STAT)
1355 ev_timer_start (EV_A_ &once->to); 3301 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1356 } 3302 }
1357 } 3303 else
1358} 3304#endif
3305 if (types & EV_TIMER)
3306 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1359 3307
3308#if EV_PERIODIC_ENABLE
3309 if (types & EV_PERIODIC)
3310 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3311 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3312#endif
3313
3314#if EV_IDLE_ENABLE
3315 if (types & EV_IDLE)
3316 for (j = NUMPRI; i--; )
3317 for (i = idlecnt [j]; i--; )
3318 cb (EV_A_ EV_IDLE, idles [j][i]);
3319#endif
3320
3321#if EV_FORK_ENABLE
3322 if (types & EV_FORK)
3323 for (i = forkcnt; i--; )
3324 if (ev_cb (forks [i]) != embed_fork_cb)
3325 cb (EV_A_ EV_FORK, forks [i]);
3326#endif
3327
3328#if EV_ASYNC_ENABLE
3329 if (types & EV_ASYNC)
3330 for (i = asynccnt; i--; )
3331 cb (EV_A_ EV_ASYNC, asyncs [i]);
3332#endif
3333
3334 if (types & EV_PREPARE)
3335 for (i = preparecnt; i--; )
3336#if EV_EMBED_ENABLE
3337 if (ev_cb (prepares [i]) != embed_prepare_cb)
3338#endif
3339 cb (EV_A_ EV_PREPARE, prepares [i]);
3340
3341 if (types & EV_CHECK)
3342 for (i = checkcnt; i--; )
3343 cb (EV_A_ EV_CHECK, checks [i]);
3344
3345 if (types & EV_SIGNAL)
3346 for (i = 0; i < signalmax; ++i)
3347 for (wl = signals [i].head; wl; )
3348 {
3349 wn = wl->next;
3350 cb (EV_A_ EV_SIGNAL, wl);
3351 wl = wn;
3352 }
3353
3354 if (types & EV_CHILD)
3355 for (i = EV_PID_HASHSIZE; i--; )
3356 for (wl = childs [i]; wl; )
3357 {
3358 wn = wl->next;
3359 cb (EV_A_ EV_CHILD, wl);
3360 wl = wn;
3361 }
3362/* EV_STAT 0x00001000 /* stat data changed */
3363/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3364}
3365#endif
3366
3367#if EV_MULTIPLICITY
3368 #include "ev_wrap.h"
3369#endif
3370
3371#ifdef __cplusplus
3372}
3373#endif
3374

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