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Revision: 1.287
Committed: Mon Apr 20 19:45:58 2009 UTC (15 years ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.286: +2 -0 lines
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# User Rev Content
1 root 1.17 /*
2 root 1.36 * libev event processing core, watcher management
3     *
4 root 1.278 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 root 1.17 * All rights reserved.
6     *
7 root 1.199 * Redistribution and use in source and binary forms, with or without modifica-
8     * tion, are permitted provided that the following conditions are 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.
27 root 1.17 *
28 root 1.199 * Alternatively, the contents of this file may be used under the terms of
29     * the GNU General Public License ("GPL") version 2 or any later version,
30     * in which case the provisions of the GPL are applicable instead of
31     * the above. If you wish to allow the use of your version of this file
32     * only under the terms of the GPL and not to allow others to use your
33     * version of this file under the BSD license, indicate your decision
34     * by deleting the provisions above and replace them with the notice
35     * and other provisions required by the GPL. If you do not delete the
36     * provisions above, a recipient may use your version of this file under
37     * either the BSD or the GPL.
38 root 1.17 */
39 root 1.87
40     #ifdef __cplusplus
41     extern "C" {
42     #endif
43    
44 root 1.220 /* this big block deduces configuration from config.h */
45 root 1.59 #ifndef EV_STANDALONE
46 root 1.133 # ifdef EV_CONFIG_H
47     # include EV_CONFIG_H
48     # else
49     # include "config.h"
50     # endif
51 root 1.60
52 root 1.274 # 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     # endif
63    
64 root 1.60 # if HAVE_CLOCK_GETTIME
65 root 1.97 # ifndef EV_USE_MONOTONIC
66     # define EV_USE_MONOTONIC 1
67     # endif
68     # ifndef EV_USE_REALTIME
69 root 1.279 # define EV_USE_REALTIME 0
70 root 1.97 # endif
71 root 1.126 # else
72     # ifndef EV_USE_MONOTONIC
73     # define EV_USE_MONOTONIC 0
74     # endif
75     # ifndef EV_USE_REALTIME
76     # define EV_USE_REALTIME 0
77     # endif
78 root 1.60 # endif
79    
80 root 1.193 # ifndef EV_USE_NANOSLEEP
81     # if HAVE_NANOSLEEP
82     # define EV_USE_NANOSLEEP 1
83     # else
84     # define EV_USE_NANOSLEEP 0
85     # endif
86     # endif
87    
88 root 1.127 # ifndef EV_USE_SELECT
89     # if HAVE_SELECT && HAVE_SYS_SELECT_H
90     # define EV_USE_SELECT 1
91     # else
92     # define EV_USE_SELECT 0
93     # endif
94 root 1.60 # endif
95    
96 root 1.127 # ifndef EV_USE_POLL
97     # if HAVE_POLL && HAVE_POLL_H
98     # define EV_USE_POLL 1
99     # else
100     # define EV_USE_POLL 0
101     # endif
102 root 1.60 # endif
103 root 1.127
104     # ifndef EV_USE_EPOLL
105     # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106     # define EV_USE_EPOLL 1
107     # else
108     # define EV_USE_EPOLL 0
109     # endif
110 root 1.60 # endif
111 root 1.127
112     # ifndef EV_USE_KQUEUE
113     # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114     # define EV_USE_KQUEUE 1
115     # else
116     # define EV_USE_KQUEUE 0
117     # endif
118 root 1.60 # endif
119 root 1.127
120     # ifndef EV_USE_PORT
121     # if HAVE_PORT_H && HAVE_PORT_CREATE
122     # define EV_USE_PORT 1
123     # else
124     # define EV_USE_PORT 0
125     # endif
126 root 1.118 # endif
127    
128 root 1.152 # ifndef EV_USE_INOTIFY
129     # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130     # define EV_USE_INOTIFY 1
131     # else
132     # define EV_USE_INOTIFY 0
133     # endif
134     # endif
135    
136 root 1.220 # ifndef EV_USE_EVENTFD
137     # if HAVE_EVENTFD
138     # define EV_USE_EVENTFD 1
139     # else
140     # define EV_USE_EVENTFD 0
141     # endif
142     # endif
143 root 1.250
144 root 1.29 #endif
145 root 1.17
146 root 1.1 #include <math.h>
147     #include <stdlib.h>
148 root 1.7 #include <fcntl.h>
149 root 1.16 #include <stddef.h>
150 root 1.1
151     #include <stdio.h>
152    
153 root 1.4 #include <assert.h>
154 root 1.1 #include <errno.h>
155 root 1.22 #include <sys/types.h>
156 root 1.71 #include <time.h>
157    
158 root 1.72 #include <signal.h>
159 root 1.71
160 root 1.152 #ifdef EV_H
161     # include EV_H
162     #else
163     # include "ev.h"
164     #endif
165    
166 root 1.103 #ifndef _WIN32
167 root 1.71 # include <sys/time.h>
168 root 1.45 # include <sys/wait.h>
169 root 1.140 # include <unistd.h>
170 root 1.103 #else
171 root 1.256 # include <io.h>
172 root 1.103 # define WIN32_LEAN_AND_MEAN
173     # include <windows.h>
174     # ifndef EV_SELECT_IS_WINSOCKET
175     # define EV_SELECT_IS_WINSOCKET 1
176     # endif
177 root 1.45 #endif
178 root 1.103
179 root 1.220 /* this block tries to deduce configuration from header-defined symbols and defaults */
180 root 1.40
181 root 1.274 #ifndef EV_USE_CLOCK_SYSCALL
182     # if __linux && __GLIBC__ >= 2
183     # define EV_USE_CLOCK_SYSCALL 1
184     # else
185     # define EV_USE_CLOCK_SYSCALL 0
186     # endif
187     #endif
188    
189 root 1.29 #ifndef EV_USE_MONOTONIC
190 root 1.253 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
191     # define EV_USE_MONOTONIC 1
192     # else
193     # define EV_USE_MONOTONIC 0
194     # endif
195 root 1.37 #endif
196    
197 root 1.118 #ifndef EV_USE_REALTIME
198 root 1.279 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199 root 1.118 #endif
200    
201 root 1.193 #ifndef EV_USE_NANOSLEEP
202 root 1.253 # if _POSIX_C_SOURCE >= 199309L
203     # define EV_USE_NANOSLEEP 1
204     # else
205     # define EV_USE_NANOSLEEP 0
206     # endif
207 root 1.193 #endif
208    
209 root 1.29 #ifndef EV_USE_SELECT
210     # define EV_USE_SELECT 1
211 root 1.10 #endif
212    
213 root 1.59 #ifndef EV_USE_POLL
214 root 1.104 # ifdef _WIN32
215     # define EV_USE_POLL 0
216     # else
217     # define EV_USE_POLL 1
218     # endif
219 root 1.41 #endif
220    
221 root 1.29 #ifndef EV_USE_EPOLL
222 root 1.220 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223     # define EV_USE_EPOLL 1
224     # else
225     # define EV_USE_EPOLL 0
226     # endif
227 root 1.10 #endif
228    
229 root 1.44 #ifndef EV_USE_KQUEUE
230     # define EV_USE_KQUEUE 0
231     #endif
232    
233 root 1.118 #ifndef EV_USE_PORT
234     # define EV_USE_PORT 0
235 root 1.40 #endif
236    
237 root 1.152 #ifndef EV_USE_INOTIFY
238 root 1.220 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239     # define EV_USE_INOTIFY 1
240     # else
241     # define EV_USE_INOTIFY 0
242     # endif
243 root 1.152 #endif
244    
245 root 1.149 #ifndef EV_PID_HASHSIZE
246     # if EV_MINIMAL
247     # define EV_PID_HASHSIZE 1
248     # else
249     # define EV_PID_HASHSIZE 16
250     # endif
251     #endif
252    
253 root 1.152 #ifndef EV_INOTIFY_HASHSIZE
254     # if EV_MINIMAL
255     # define EV_INOTIFY_HASHSIZE 1
256     # else
257     # define EV_INOTIFY_HASHSIZE 16
258     # endif
259     #endif
260    
261 root 1.220 #ifndef EV_USE_EVENTFD
262     # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263     # define EV_USE_EVENTFD 1
264     # else
265     # define EV_USE_EVENTFD 0
266     # endif
267     #endif
268    
269 root 1.249 #if 0 /* debugging */
270 root 1.250 # define EV_VERIFY 3
271 root 1.249 # define EV_USE_4HEAP 1
272     # define EV_HEAP_CACHE_AT 1
273     #endif
274    
275 root 1.250 #ifndef EV_VERIFY
276     # define EV_VERIFY !EV_MINIMAL
277     #endif
278    
279 root 1.243 #ifndef EV_USE_4HEAP
280     # define EV_USE_4HEAP !EV_MINIMAL
281     #endif
282    
283     #ifndef EV_HEAP_CACHE_AT
284     # define EV_HEAP_CACHE_AT !EV_MINIMAL
285     #endif
286    
287 root 1.220 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
288 root 1.40
289     #ifndef CLOCK_MONOTONIC
290     # undef EV_USE_MONOTONIC
291     # define EV_USE_MONOTONIC 0
292     #endif
293    
294 root 1.31 #ifndef CLOCK_REALTIME
295 root 1.40 # undef EV_USE_REALTIME
296 root 1.31 # define EV_USE_REALTIME 0
297     #endif
298 root 1.40
299 root 1.152 #if !EV_STAT_ENABLE
300 root 1.185 # undef EV_USE_INOTIFY
301 root 1.152 # define EV_USE_INOTIFY 0
302     #endif
303    
304 root 1.193 #if !EV_USE_NANOSLEEP
305     # ifndef _WIN32
306     # include <sys/select.h>
307     # endif
308     #endif
309    
310 root 1.152 #if EV_USE_INOTIFY
311 root 1.264 # include <sys/utsname.h>
312 root 1.273 # include <sys/statfs.h>
313 root 1.152 # include <sys/inotify.h>
314 root 1.263 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315     # ifndef IN_DONT_FOLLOW
316     # undef EV_USE_INOTIFY
317     # define EV_USE_INOTIFY 0
318     # endif
319 root 1.152 #endif
320    
321 root 1.185 #if EV_SELECT_IS_WINSOCKET
322     # include <winsock.h>
323     #endif
324    
325 root 1.274 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326     /* which makes programs even slower. might work on other unices, too. */
327     #if EV_USE_CLOCK_SYSCALL
328     # include <syscall.h>
329     # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330     # undef EV_USE_MONOTONIC
331     # define EV_USE_MONOTONIC 1
332     #endif
333    
334 root 1.220 #if EV_USE_EVENTFD
335     /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336 root 1.221 # include <stdint.h>
337 root 1.222 # ifdef __cplusplus
338     extern "C" {
339     # endif
340 root 1.220 int eventfd (unsigned int initval, int flags);
341 root 1.222 # ifdef __cplusplus
342     }
343     # endif
344 root 1.220 #endif
345    
346 root 1.40 /**/
347 root 1.1
348 root 1.250 #if EV_VERIFY >= 3
349 root 1.248 # define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350     #else
351     # define EV_FREQUENT_CHECK do { } while (0)
352     #endif
353    
354 root 1.176 /*
355     * This is used to avoid floating point rounding problems.
356     * It is added to ev_rt_now when scheduling periodics
357     * to ensure progress, time-wise, even when rounding
358     * errors are against us.
359 root 1.177 * This value is good at least till the year 4000.
360 root 1.176 * Better solutions welcome.
361     */
362     #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363    
364 root 1.4 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
365 root 1.120 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366 root 1.176 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367 root 1.1
368 root 1.185 #if __GNUC__ >= 4
369 root 1.40 # define expect(expr,value) __builtin_expect ((expr),(value))
370 root 1.169 # define noinline __attribute__ ((noinline))
371 root 1.40 #else
372     # define expect(expr,value) (expr)
373 root 1.140 # define noinline
374 root 1.223 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375 root 1.169 # define inline
376     # endif
377 root 1.40 #endif
378    
379     #define expect_false(expr) expect ((expr) != 0, 0)
380     #define expect_true(expr) expect ((expr) != 0, 1)
381 root 1.169 #define inline_size static inline
382    
383     #if EV_MINIMAL
384     # define inline_speed static noinline
385     #else
386     # define inline_speed static inline
387     #endif
388 root 1.40
389 root 1.42 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
390 root 1.164 #define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
391 root 1.42
392 root 1.164 #define EMPTY /* required for microsofts broken pseudo-c compiler */
393 root 1.114 #define EMPTY2(a,b) /* used to suppress some warnings */
394 root 1.103
395 root 1.136 typedef ev_watcher *W;
396     typedef ev_watcher_list *WL;
397     typedef ev_watcher_time *WT;
398 root 1.10
399 root 1.229 #define ev_active(w) ((W)(w))->active
400 root 1.228 #define ev_at(w) ((WT)(w))->at
401    
402 root 1.279 #if EV_USE_REALTIME
403 root 1.194 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
404     /* giving it a reasonably high chance of working on typical architetcures */
405 root 1.279 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406     #endif
407    
408     #if EV_USE_MONOTONIC
409 root 1.207 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410 root 1.198 #endif
411 root 1.54
412 root 1.103 #ifdef _WIN32
413 root 1.98 # include "ev_win32.c"
414     #endif
415 root 1.67
416 root 1.53 /*****************************************************************************/
417 root 1.1
418 root 1.70 static void (*syserr_cb)(const char *msg);
419 root 1.69
420 root 1.141 void
421     ev_set_syserr_cb (void (*cb)(const char *msg))
422 root 1.69 {
423     syserr_cb = cb;
424     }
425    
426 root 1.141 static void noinline
427 root 1.269 ev_syserr (const char *msg)
428 root 1.69 {
429 root 1.70 if (!msg)
430     msg = "(libev) system error";
431    
432 root 1.69 if (syserr_cb)
433 root 1.70 syserr_cb (msg);
434 root 1.69 else
435     {
436 root 1.70 perror (msg);
437 root 1.69 abort ();
438     }
439     }
440    
441 root 1.224 static void *
442     ev_realloc_emul (void *ptr, long size)
443     {
444     /* some systems, notably openbsd and darwin, fail to properly
445     * implement realloc (x, 0) (as required by both ansi c-98 and
446     * the single unix specification, so work around them here.
447     */
448    
449     if (size)
450     return realloc (ptr, size);
451    
452     free (ptr);
453     return 0;
454     }
455    
456     static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457 root 1.69
458 root 1.141 void
459 root 1.155 ev_set_allocator (void *(*cb)(void *ptr, long size))
460 root 1.69 {
461     alloc = cb;
462     }
463    
464 root 1.150 inline_speed void *
465 root 1.155 ev_realloc (void *ptr, long size)
466 root 1.69 {
467 root 1.224 ptr = alloc (ptr, size);
468 root 1.69
469     if (!ptr && size)
470     {
471 root 1.155 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
472 root 1.69 abort ();
473     }
474    
475     return ptr;
476     }
477    
478     #define ev_malloc(size) ev_realloc (0, (size))
479     #define ev_free(ptr) ev_realloc ((ptr), 0)
480    
481     /*****************************************************************************/
482    
483 root 1.53 typedef struct
484     {
485 root 1.68 WL head;
486 root 1.53 unsigned char events;
487     unsigned char reify;
488 root 1.265 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 root 1.269 unsigned char unused;
490     #if EV_USE_EPOLL
491     unsigned int egen; /* generation counter to counter epoll bugs */
492     #endif
493 root 1.103 #if EV_SELECT_IS_WINSOCKET
494     SOCKET handle;
495     #endif
496 root 1.53 } ANFD;
497 root 1.1
498 root 1.53 typedef struct
499     {
500     W w;
501     int events;
502     } ANPENDING;
503 root 1.51
504 root 1.155 #if EV_USE_INOTIFY
505 root 1.241 /* hash table entry per inotify-id */
506 root 1.152 typedef struct
507     {
508     WL head;
509 root 1.155 } ANFS;
510 root 1.152 #endif
511    
512 root 1.241 /* Heap Entry */
513     #if EV_HEAP_CACHE_AT
514     typedef struct {
515 root 1.243 ev_tstamp at;
516 root 1.241 WT w;
517     } ANHE;
518    
519 root 1.248 #define ANHE_w(he) (he).w /* access watcher, read-write */
520     #define ANHE_at(he) (he).at /* access cached at, read-only */
521     #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522 root 1.241 #else
523     typedef WT ANHE;
524    
525 root 1.248 #define ANHE_w(he) (he)
526     #define ANHE_at(he) (he)->at
527     #define ANHE_at_cache(he)
528 root 1.241 #endif
529    
530 root 1.55 #if EV_MULTIPLICITY
531 root 1.54
532 root 1.80 struct ev_loop
533     {
534 root 1.86 ev_tstamp ev_rt_now;
535 root 1.99 #define ev_rt_now ((loop)->ev_rt_now)
536 root 1.80 #define VAR(name,decl) decl;
537     #include "ev_vars.h"
538     #undef VAR
539     };
540     #include "ev_wrap.h"
541    
542 root 1.116 static struct ev_loop default_loop_struct;
543     struct ev_loop *ev_default_loop_ptr;
544 root 1.54
545 root 1.53 #else
546 root 1.54
547 root 1.86 ev_tstamp ev_rt_now;
548 root 1.80 #define VAR(name,decl) static decl;
549     #include "ev_vars.h"
550     #undef VAR
551    
552 root 1.116 static int ev_default_loop_ptr;
553 root 1.54
554 root 1.51 #endif
555 root 1.1
556 root 1.8 /*****************************************************************************/
557    
558 root 1.141 ev_tstamp
559 root 1.1 ev_time (void)
560     {
561 root 1.29 #if EV_USE_REALTIME
562 root 1.279 if (expect_true (have_realtime))
563     {
564     struct timespec ts;
565     clock_gettime (CLOCK_REALTIME, &ts);
566     return ts.tv_sec + ts.tv_nsec * 1e-9;
567     }
568     #endif
569    
570 root 1.1 struct timeval tv;
571     gettimeofday (&tv, 0);
572     return tv.tv_sec + tv.tv_usec * 1e-6;
573     }
574    
575 root 1.284 inline_size ev_tstamp
576 root 1.1 get_clock (void)
577     {
578 root 1.29 #if EV_USE_MONOTONIC
579 root 1.40 if (expect_true (have_monotonic))
580 root 1.1 {
581     struct timespec ts;
582     clock_gettime (CLOCK_MONOTONIC, &ts);
583     return ts.tv_sec + ts.tv_nsec * 1e-9;
584     }
585     #endif
586    
587     return ev_time ();
588     }
589    
590 root 1.85 #if EV_MULTIPLICITY
591 root 1.51 ev_tstamp
592     ev_now (EV_P)
593     {
594 root 1.85 return ev_rt_now;
595 root 1.51 }
596 root 1.85 #endif
597 root 1.51
598 root 1.193 void
599     ev_sleep (ev_tstamp delay)
600     {
601     if (delay > 0.)
602     {
603     #if EV_USE_NANOSLEEP
604     struct timespec ts;
605    
606     ts.tv_sec = (time_t)delay;
607     ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608    
609     nanosleep (&ts, 0);
610     #elif defined(_WIN32)
611 root 1.217 Sleep ((unsigned long)(delay * 1e3));
612 root 1.193 #else
613     struct timeval tv;
614    
615     tv.tv_sec = (time_t)delay;
616     tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617    
618 root 1.257 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619     /* somehting nto guaranteed by newer posix versions, but guaranteed */
620     /* by older ones */
621 root 1.193 select (0, 0, 0, 0, &tv);
622     #endif
623     }
624     }
625    
626     /*****************************************************************************/
627    
628 root 1.233 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629 root 1.232
630 root 1.284 inline_size int
631 root 1.163 array_nextsize (int elem, int cur, int cnt)
632     {
633     int ncur = cur + 1;
634    
635     do
636     ncur <<= 1;
637     while (cnt > ncur);
638    
639 root 1.232 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
640     if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
641 root 1.163 {
642     ncur *= elem;
643 root 1.232 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
644 root 1.163 ncur = ncur - sizeof (void *) * 4;
645     ncur /= elem;
646     }
647    
648     return ncur;
649     }
650    
651 root 1.171 static noinline void *
652 root 1.163 array_realloc (int elem, void *base, int *cur, int cnt)
653     {
654     *cur = array_nextsize (elem, *cur, cnt);
655     return ev_realloc (base, elem * *cur);
656     }
657 root 1.29
658 root 1.265 #define array_init_zero(base,count) \
659     memset ((void *)(base), 0, sizeof (*(base)) * (count))
660    
661 root 1.74 #define array_needsize(type,base,cur,cnt,init) \
662 root 1.163 if (expect_false ((cnt) > (cur))) \
663 root 1.69 { \
664 root 1.163 int ocur_ = (cur); \
665     (base) = (type *)array_realloc \
666     (sizeof (type), (base), &(cur), (cnt)); \
667     init ((base) + (ocur_), (cur) - ocur_); \
668 root 1.1 }
669    
670 root 1.163 #if 0
671 root 1.74 #define array_slim(type,stem) \
672 root 1.67 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
673     { \
674     stem ## max = array_roundsize (stem ## cnt >> 1); \
675 root 1.74 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
676 root 1.67 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
677     }
678 root 1.163 #endif
679 root 1.67
680 root 1.65 #define array_free(stem, idx) \
681 root 1.280 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682 root 1.65
683 root 1.8 /*****************************************************************************/
684    
685 root 1.140 void noinline
686 root 1.78 ev_feed_event (EV_P_ void *w, int revents)
687 root 1.1 {
688 root 1.78 W w_ = (W)w;
689 root 1.171 int pri = ABSPRI (w_);
690 root 1.78
691 root 1.123 if (expect_false (w_->pending))
692 root 1.171 pendings [pri][w_->pending - 1].events |= revents;
693     else
694 root 1.32 {
695 root 1.171 w_->pending = ++pendingcnt [pri];
696     array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
697     pendings [pri][w_->pending - 1].w = w_;
698     pendings [pri][w_->pending - 1].events = revents;
699 root 1.32 }
700 root 1.1 }
701    
702 root 1.284 inline_speed void
703     feed_reverse (EV_P_ W w)
704     {
705     array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
706     rfeeds [rfeedcnt++] = w;
707     }
708    
709     inline_size void
710     feed_reverse_done (EV_P_ int revents)
711     {
712     do
713     ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
714     while (rfeedcnt);
715     }
716    
717     inline_speed void
718 root 1.51 queue_events (EV_P_ W *events, int eventcnt, int type)
719 root 1.27 {
720     int i;
721    
722     for (i = 0; i < eventcnt; ++i)
723 root 1.78 ev_feed_event (EV_A_ events [i], type);
724 root 1.27 }
725    
726 root 1.141 /*****************************************************************************/
727    
728 root 1.284 inline_speed void
729 root 1.79 fd_event (EV_P_ int fd, int revents)
730 root 1.1 {
731     ANFD *anfd = anfds + fd;
732 root 1.136 ev_io *w;
733 root 1.1
734 root 1.136 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
735 root 1.1 {
736 root 1.79 int ev = w->events & revents;
737 root 1.1
738     if (ev)
739 root 1.78 ev_feed_event (EV_A_ (W)w, ev);
740 root 1.1 }
741     }
742    
743 root 1.79 void
744     ev_feed_fd_event (EV_P_ int fd, int revents)
745     {
746 root 1.168 if (fd >= 0 && fd < anfdmax)
747     fd_event (EV_A_ fd, revents);
748 root 1.79 }
749    
750 root 1.284 inline_size void
751 root 1.51 fd_reify (EV_P)
752 root 1.9 {
753     int i;
754    
755 root 1.27 for (i = 0; i < fdchangecnt; ++i)
756     {
757     int fd = fdchanges [i];
758     ANFD *anfd = anfds + fd;
759 root 1.136 ev_io *w;
760 root 1.27
761 root 1.184 unsigned char events = 0;
762 root 1.27
763 root 1.136 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
764 root 1.184 events |= (unsigned char)w->events;
765 root 1.27
766 root 1.103 #if EV_SELECT_IS_WINSOCKET
767     if (events)
768     {
769 root 1.254 unsigned long arg;
770 root 1.200 #ifdef EV_FD_TO_WIN32_HANDLE
771     anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
772     #else
773     anfd->handle = _get_osfhandle (fd);
774     #endif
775 root 1.278 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
776 root 1.103 }
777     #endif
778    
779 root 1.184 {
780     unsigned char o_events = anfd->events;
781     unsigned char o_reify = anfd->reify;
782    
783     anfd->reify = 0;
784     anfd->events = events;
785 root 1.27
786 root 1.281 if (o_events != events || o_reify & EV__IOFDSET)
787 root 1.184 backend_modify (EV_A_ fd, o_events, events);
788     }
789 root 1.27 }
790    
791     fdchangecnt = 0;
792     }
793    
794 root 1.284 inline_size void
795 root 1.183 fd_change (EV_P_ int fd, int flags)
796 root 1.27 {
797 root 1.183 unsigned char reify = anfds [fd].reify;
798 root 1.184 anfds [fd].reify |= flags;
799 root 1.27
800 root 1.183 if (expect_true (!reify))
801     {
802     ++fdchangecnt;
803     array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
804     fdchanges [fdchangecnt - 1] = fd;
805     }
806 root 1.9 }
807    
808 root 1.284 inline_speed void
809 root 1.51 fd_kill (EV_P_ int fd)
810 root 1.41 {
811 root 1.136 ev_io *w;
812 root 1.41
813 root 1.136 while ((w = (ev_io *)anfds [fd].head))
814 root 1.41 {
815 root 1.51 ev_io_stop (EV_A_ w);
816 root 1.78 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
817 root 1.41 }
818     }
819    
820 root 1.284 inline_size int
821 root 1.71 fd_valid (int fd)
822     {
823 root 1.103 #ifdef _WIN32
824     return _get_osfhandle (fd) != -1;
825 root 1.71 #else
826     return fcntl (fd, F_GETFD) != -1;
827     #endif
828     }
829    
830 root 1.19 /* called on EBADF to verify fds */
831 root 1.140 static void noinline
832 root 1.51 fd_ebadf (EV_P)
833 root 1.19 {
834     int fd;
835    
836     for (fd = 0; fd < anfdmax; ++fd)
837 root 1.27 if (anfds [fd].events)
838 root 1.254 if (!fd_valid (fd) && errno == EBADF)
839 root 1.51 fd_kill (EV_A_ fd);
840 root 1.41 }
841    
842     /* called on ENOMEM in select/poll to kill some fds and retry */
843 root 1.140 static void noinline
844 root 1.51 fd_enomem (EV_P)
845 root 1.41 {
846 root 1.62 int fd;
847 root 1.41
848 root 1.62 for (fd = anfdmax; fd--; )
849 root 1.41 if (anfds [fd].events)
850     {
851 root 1.51 fd_kill (EV_A_ fd);
852 root 1.41 return;
853     }
854 root 1.19 }
855    
856 root 1.130 /* usually called after fork if backend needs to re-arm all fds from scratch */
857 root 1.140 static void noinline
858 root 1.56 fd_rearm_all (EV_P)
859     {
860     int fd;
861    
862     for (fd = 0; fd < anfdmax; ++fd)
863     if (anfds [fd].events)
864     {
865     anfds [fd].events = 0;
866 root 1.268 anfds [fd].emask = 0;
867 root 1.281 fd_change (EV_A_ fd, EV__IOFDSET | 1);
868 root 1.56 }
869     }
870    
871 root 1.8 /*****************************************************************************/
872    
873 root 1.235 /*
874 root 1.241 * the heap functions want a real array index. array index 0 uis guaranteed to not
875     * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
876     * the branching factor of the d-tree.
877     */
878    
879     /*
880 root 1.235 * at the moment we allow libev the luxury of two heaps,
881     * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
882     * which is more cache-efficient.
883     * the difference is about 5% with 50000+ watchers.
884     */
885 root 1.241 #if EV_USE_4HEAP
886 root 1.235
887 root 1.237 #define DHEAP 4
888     #define HEAP0 (DHEAP - 1) /* index of first element in heap */
889 root 1.247 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
890 root 1.248 #define UPHEAP_DONE(p,k) ((p) == (k))
891 root 1.235
892     /* away from the root */
893 root 1.284 inline_speed void
894 root 1.241 downheap (ANHE *heap, int N, int k)
895 root 1.235 {
896 root 1.241 ANHE he = heap [k];
897     ANHE *E = heap + N + HEAP0;
898 root 1.235
899     for (;;)
900     {
901     ev_tstamp minat;
902 root 1.241 ANHE *minpos;
903 root 1.248 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
904 root 1.235
905 root 1.248 /* find minimum child */
906 root 1.237 if (expect_true (pos + DHEAP - 1 < E))
907 root 1.235 {
908 root 1.245 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
909     if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
910     if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
911     if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
912 root 1.235 }
913 root 1.240 else if (pos < E)
914 root 1.235 {
915 root 1.241 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
916     if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
917     if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
918     if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
919 root 1.235 }
920 root 1.240 else
921     break;
922 root 1.235
923 root 1.241 if (ANHE_at (he) <= minat)
924 root 1.235 break;
925    
926 root 1.247 heap [k] = *minpos;
927 root 1.241 ev_active (ANHE_w (*minpos)) = k;
928 root 1.235
929     k = minpos - heap;
930     }
931    
932 root 1.247 heap [k] = he;
933 root 1.241 ev_active (ANHE_w (he)) = k;
934 root 1.235 }
935    
936 root 1.248 #else /* 4HEAP */
937 root 1.235
938     #define HEAP0 1
939 root 1.247 #define HPARENT(k) ((k) >> 1)
940 root 1.248 #define UPHEAP_DONE(p,k) (!(p))
941 root 1.235
942 root 1.248 /* away from the root */
943 root 1.284 inline_speed void
944 root 1.248 downheap (ANHE *heap, int N, int k)
945 root 1.1 {
946 root 1.241 ANHE he = heap [k];
947 root 1.1
948 root 1.228 for (;;)
949 root 1.1 {
950 root 1.248 int c = k << 1;
951 root 1.179
952 root 1.248 if (c > N + HEAP0 - 1)
953 root 1.179 break;
954    
955 root 1.248 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
956     ? 1 : 0;
957    
958     if (ANHE_at (he) <= ANHE_at (heap [c]))
959     break;
960    
961     heap [k] = heap [c];
962 root 1.241 ev_active (ANHE_w (heap [k])) = k;
963 root 1.248
964     k = c;
965 root 1.1 }
966    
967 root 1.243 heap [k] = he;
968 root 1.248 ev_active (ANHE_w (he)) = k;
969 root 1.1 }
970 root 1.248 #endif
971 root 1.1
972 root 1.248 /* towards the root */
973 root 1.284 inline_speed void
974 root 1.248 upheap (ANHE *heap, int k)
975 root 1.1 {
976 root 1.241 ANHE he = heap [k];
977 root 1.1
978 root 1.179 for (;;)
979 root 1.1 {
980 root 1.248 int p = HPARENT (k);
981 root 1.179
982 root 1.248 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
983 root 1.179 break;
984 root 1.1
985 root 1.248 heap [k] = heap [p];
986 root 1.241 ev_active (ANHE_w (heap [k])) = k;
987 root 1.248 k = p;
988 root 1.1 }
989    
990 root 1.241 heap [k] = he;
991     ev_active (ANHE_w (he)) = k;
992 root 1.1 }
993    
994 root 1.284 inline_size void
995 root 1.241 adjustheap (ANHE *heap, int N, int k)
996 root 1.84 {
997 root 1.247 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
998     upheap (heap, k);
999     else
1000     downheap (heap, N, k);
1001 root 1.84 }
1002    
1003 root 1.248 /* rebuild the heap: this function is used only once and executed rarely */
1004 root 1.284 inline_size void
1005 root 1.248 reheap (ANHE *heap, int N)
1006     {
1007     int i;
1008 root 1.251
1009 root 1.248 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1010     /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1011     for (i = 0; i < N; ++i)
1012     upheap (heap, i + HEAP0);
1013     }
1014    
1015 root 1.8 /*****************************************************************************/
1016    
1017 root 1.7 typedef struct
1018     {
1019 root 1.68 WL head;
1020 root 1.207 EV_ATOMIC_T gotsig;
1021 root 1.7 } ANSIG;
1022    
1023     static ANSIG *signals;
1024 root 1.4 static int signalmax;
1025 root 1.1
1026 root 1.207 static EV_ATOMIC_T gotsig;
1027 root 1.7
1028 root 1.207 /*****************************************************************************/
1029    
1030 root 1.284 inline_speed void
1031 root 1.207 fd_intern (int fd)
1032     {
1033     #ifdef _WIN32
1034 root 1.254 unsigned long arg = 1;
1035 root 1.207 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1036     #else
1037     fcntl (fd, F_SETFD, FD_CLOEXEC);
1038     fcntl (fd, F_SETFL, O_NONBLOCK);
1039     #endif
1040     }
1041    
1042     static void noinline
1043     evpipe_init (EV_P)
1044     {
1045     if (!ev_is_active (&pipeev))
1046     {
1047 root 1.220 #if EV_USE_EVENTFD
1048     if ((evfd = eventfd (0, 0)) >= 0)
1049     {
1050     evpipe [0] = -1;
1051     fd_intern (evfd);
1052     ev_io_set (&pipeev, evfd, EV_READ);
1053     }
1054     else
1055     #endif
1056     {
1057     while (pipe (evpipe))
1058 root 1.269 ev_syserr ("(libev) error creating signal/async pipe");
1059 root 1.207
1060 root 1.220 fd_intern (evpipe [0]);
1061     fd_intern (evpipe [1]);
1062     ev_io_set (&pipeev, evpipe [0], EV_READ);
1063     }
1064 root 1.207
1065     ev_io_start (EV_A_ &pipeev);
1066 root 1.210 ev_unref (EV_A); /* watcher should not keep loop alive */
1067 root 1.207 }
1068     }
1069    
1070 root 1.284 inline_size void
1071 root 1.214 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1072 root 1.207 {
1073 root 1.214 if (!*flag)
1074 root 1.207 {
1075 ayin 1.215 int old_errno = errno; /* save errno because write might clobber it */
1076 root 1.214
1077     *flag = 1;
1078 root 1.220
1079     #if EV_USE_EVENTFD
1080     if (evfd >= 0)
1081     {
1082     uint64_t counter = 1;
1083     write (evfd, &counter, sizeof (uint64_t));
1084     }
1085     else
1086     #endif
1087     write (evpipe [1], &old_errno, 1);
1088 root 1.214
1089 root 1.207 errno = old_errno;
1090     }
1091     }
1092    
1093     static void
1094     pipecb (EV_P_ ev_io *iow, int revents)
1095     {
1096 root 1.220 #if EV_USE_EVENTFD
1097     if (evfd >= 0)
1098     {
1099 root 1.232 uint64_t counter;
1100 root 1.220 read (evfd, &counter, sizeof (uint64_t));
1101     }
1102     else
1103     #endif
1104     {
1105     char dummy;
1106     read (evpipe [0], &dummy, 1);
1107     }
1108 root 1.207
1109 root 1.211 if (gotsig && ev_is_default_loop (EV_A))
1110 root 1.207 {
1111     int signum;
1112     gotsig = 0;
1113    
1114     for (signum = signalmax; signum--; )
1115     if (signals [signum].gotsig)
1116     ev_feed_signal_event (EV_A_ signum + 1);
1117     }
1118    
1119 root 1.209 #if EV_ASYNC_ENABLE
1120 root 1.207 if (gotasync)
1121     {
1122     int i;
1123     gotasync = 0;
1124    
1125     for (i = asynccnt; i--; )
1126     if (asyncs [i]->sent)
1127     {
1128     asyncs [i]->sent = 0;
1129     ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1130     }
1131     }
1132 root 1.209 #endif
1133 root 1.207 }
1134    
1135     /*****************************************************************************/
1136    
1137 root 1.7 static void
1138 root 1.218 ev_sighandler (int signum)
1139 root 1.7 {
1140 root 1.207 #if EV_MULTIPLICITY
1141     struct ev_loop *loop = &default_loop_struct;
1142     #endif
1143    
1144 root 1.103 #if _WIN32
1145 root 1.218 signal (signum, ev_sighandler);
1146 root 1.67 #endif
1147    
1148 root 1.7 signals [signum - 1].gotsig = 1;
1149 root 1.214 evpipe_write (EV_A_ &gotsig);
1150 root 1.7 }
1151    
1152 root 1.140 void noinline
1153 root 1.79 ev_feed_signal_event (EV_P_ int signum)
1154     {
1155 root 1.80 WL w;
1156    
1157 root 1.79 #if EV_MULTIPLICITY
1158 root 1.278 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1159 root 1.79 #endif
1160    
1161     --signum;
1162    
1163     if (signum < 0 || signum >= signalmax)
1164     return;
1165    
1166     signals [signum].gotsig = 0;
1167    
1168     for (w = signals [signum].head; w; w = w->next)
1169     ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1170     }
1171    
1172 root 1.8 /*****************************************************************************/
1173    
1174 root 1.182 static WL childs [EV_PID_HASHSIZE];
1175 root 1.71
1176 root 1.103 #ifndef _WIN32
1177 root 1.45
1178 root 1.136 static ev_signal childev;
1179 root 1.59
1180 root 1.206 #ifndef WIFCONTINUED
1181     # define WIFCONTINUED(status) 0
1182     #endif
1183    
1184 root 1.284 inline_speed void
1185 root 1.216 child_reap (EV_P_ int chain, int pid, int status)
1186 root 1.47 {
1187 root 1.136 ev_child *w;
1188 root 1.206 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1189 root 1.47
1190 root 1.149 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1191 root 1.206 {
1192     if ((w->pid == pid || !w->pid)
1193     && (!traced || (w->flags & 1)))
1194     {
1195 root 1.216 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1196 root 1.206 w->rpid = pid;
1197     w->rstatus = status;
1198     ev_feed_event (EV_A_ (W)w, EV_CHILD);
1199     }
1200     }
1201 root 1.47 }
1202    
1203 root 1.142 #ifndef WCONTINUED
1204     # define WCONTINUED 0
1205     #endif
1206    
1207 root 1.47 static void
1208 root 1.136 childcb (EV_P_ ev_signal *sw, int revents)
1209 root 1.22 {
1210     int pid, status;
1211    
1212 root 1.142 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1213     if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1214     if (!WCONTINUED
1215     || errno != EINVAL
1216     || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1217     return;
1218    
1219 root 1.216 /* make sure we are called again until all children have been reaped */
1220 root 1.142 /* we need to do it this way so that the callback gets called before we continue */
1221     ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1222 root 1.47
1223 root 1.216 child_reap (EV_A_ pid, pid, status);
1224 root 1.149 if (EV_PID_HASHSIZE > 1)
1225 root 1.216 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1226 root 1.22 }
1227    
1228 root 1.45 #endif
1229    
1230 root 1.22 /*****************************************************************************/
1231    
1232 root 1.118 #if EV_USE_PORT
1233     # include "ev_port.c"
1234     #endif
1235 root 1.44 #if EV_USE_KQUEUE
1236     # include "ev_kqueue.c"
1237     #endif
1238 root 1.29 #if EV_USE_EPOLL
1239 root 1.1 # include "ev_epoll.c"
1240     #endif
1241 root 1.59 #if EV_USE_POLL
1242 root 1.41 # include "ev_poll.c"
1243     #endif
1244 root 1.29 #if EV_USE_SELECT
1245 root 1.1 # include "ev_select.c"
1246     #endif
1247    
1248 root 1.24 int
1249     ev_version_major (void)
1250     {
1251     return EV_VERSION_MAJOR;
1252     }
1253    
1254     int
1255     ev_version_minor (void)
1256     {
1257     return EV_VERSION_MINOR;
1258     }
1259    
1260 root 1.49 /* return true if we are running with elevated privileges and should ignore env variables */
1261 root 1.140 int inline_size
1262 root 1.51 enable_secure (void)
1263 root 1.41 {
1264 root 1.103 #ifdef _WIN32
1265 root 1.49 return 0;
1266     #else
1267 root 1.41 return getuid () != geteuid ()
1268     || getgid () != getegid ();
1269 root 1.49 #endif
1270 root 1.41 }
1271    
1272 root 1.111 unsigned int
1273 root 1.129 ev_supported_backends (void)
1274     {
1275 root 1.130 unsigned int flags = 0;
1276 root 1.129
1277     if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1278     if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1279     if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1280     if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1281     if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1282    
1283     return flags;
1284     }
1285    
1286     unsigned int
1287 root 1.130 ev_recommended_backends (void)
1288 root 1.1 {
1289 root 1.131 unsigned int flags = ev_supported_backends ();
1290 root 1.129
1291     #ifndef __NetBSD__
1292     /* kqueue is borked on everything but netbsd apparently */
1293     /* it usually doesn't work correctly on anything but sockets and pipes */
1294     flags &= ~EVBACKEND_KQUEUE;
1295     #endif
1296     #ifdef __APPLE__
1297 root 1.278 /* only select works correctly on that "unix-certified" platform */
1298     flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1299     flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1300 root 1.129 #endif
1301    
1302     return flags;
1303 root 1.51 }
1304    
1305 root 1.130 unsigned int
1306 root 1.134 ev_embeddable_backends (void)
1307     {
1308 root 1.196 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1309    
1310 root 1.192 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1311 root 1.196 /* please fix it and tell me how to detect the fix */
1312     flags &= ~EVBACKEND_EPOLL;
1313    
1314     return flags;
1315 root 1.134 }
1316    
1317     unsigned int
1318 root 1.130 ev_backend (EV_P)
1319     {
1320     return backend;
1321     }
1322    
1323 root 1.162 unsigned int
1324     ev_loop_count (EV_P)
1325     {
1326     return loop_count;
1327     }
1328    
1329 root 1.193 void
1330     ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1331     {
1332     io_blocktime = interval;
1333     }
1334    
1335     void
1336     ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1337     {
1338     timeout_blocktime = interval;
1339     }
1340    
1341 root 1.151 static void noinline
1342 root 1.108 loop_init (EV_P_ unsigned int flags)
1343 root 1.51 {
1344 root 1.130 if (!backend)
1345 root 1.23 {
1346 root 1.279 #if EV_USE_REALTIME
1347     if (!have_realtime)
1348     {
1349     struct timespec ts;
1350    
1351     if (!clock_gettime (CLOCK_REALTIME, &ts))
1352     have_realtime = 1;
1353     }
1354     #endif
1355    
1356 root 1.29 #if EV_USE_MONOTONIC
1357 root 1.279 if (!have_monotonic)
1358     {
1359     struct timespec ts;
1360    
1361     if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1362     have_monotonic = 1;
1363     }
1364 root 1.1 #endif
1365    
1366 root 1.209 ev_rt_now = ev_time ();
1367     mn_now = get_clock ();
1368     now_floor = mn_now;
1369     rtmn_diff = ev_rt_now - mn_now;
1370 root 1.1
1371 root 1.193 io_blocktime = 0.;
1372     timeout_blocktime = 0.;
1373 root 1.209 backend = 0;
1374     backend_fd = -1;
1375     gotasync = 0;
1376     #if EV_USE_INOTIFY
1377     fs_fd = -2;
1378     #endif
1379 root 1.193
1380 root 1.158 /* pid check not overridable via env */
1381     #ifndef _WIN32
1382     if (flags & EVFLAG_FORKCHECK)
1383     curpid = getpid ();
1384     #endif
1385    
1386 root 1.128 if (!(flags & EVFLAG_NOENV)
1387     && !enable_secure ()
1388     && getenv ("LIBEV_FLAGS"))
1389 root 1.108 flags = atoi (getenv ("LIBEV_FLAGS"));
1390    
1391 root 1.225 if (!(flags & 0x0000ffffU))
1392 root 1.129 flags |= ev_recommended_backends ();
1393 root 1.41
1394 root 1.118 #if EV_USE_PORT
1395 root 1.130 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1396 root 1.118 #endif
1397 root 1.44 #if EV_USE_KQUEUE
1398 root 1.130 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1399 root 1.44 #endif
1400 root 1.29 #if EV_USE_EPOLL
1401 root 1.130 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1402 root 1.41 #endif
1403 root 1.59 #if EV_USE_POLL
1404 root 1.130 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1405 root 1.1 #endif
1406 root 1.29 #if EV_USE_SELECT
1407 root 1.130 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1408 root 1.1 #endif
1409 root 1.70
1410 root 1.207 ev_init (&pipeev, pipecb);
1411     ev_set_priority (&pipeev, EV_MAXPRI);
1412 root 1.56 }
1413     }
1414    
1415 root 1.151 static void noinline
1416 root 1.56 loop_destroy (EV_P)
1417     {
1418 root 1.65 int i;
1419    
1420 root 1.207 if (ev_is_active (&pipeev))
1421     {
1422     ev_ref (EV_A); /* signal watcher */
1423     ev_io_stop (EV_A_ &pipeev);
1424    
1425 root 1.220 #if EV_USE_EVENTFD
1426     if (evfd >= 0)
1427     close (evfd);
1428     #endif
1429    
1430     if (evpipe [0] >= 0)
1431     {
1432     close (evpipe [0]);
1433     close (evpipe [1]);
1434     }
1435 root 1.207 }
1436    
1437 root 1.152 #if EV_USE_INOTIFY
1438     if (fs_fd >= 0)
1439     close (fs_fd);
1440     #endif
1441    
1442     if (backend_fd >= 0)
1443     close (backend_fd);
1444    
1445 root 1.118 #if EV_USE_PORT
1446 root 1.130 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1447 root 1.118 #endif
1448 root 1.56 #if EV_USE_KQUEUE
1449 root 1.130 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1450 root 1.56 #endif
1451     #if EV_USE_EPOLL
1452 root 1.130 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1453 root 1.56 #endif
1454 root 1.59 #if EV_USE_POLL
1455 root 1.130 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1456 root 1.56 #endif
1457     #if EV_USE_SELECT
1458 root 1.130 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1459 root 1.56 #endif
1460 root 1.1
1461 root 1.65 for (i = NUMPRI; i--; )
1462 root 1.164 {
1463     array_free (pending, [i]);
1464     #if EV_IDLE_ENABLE
1465     array_free (idle, [i]);
1466     #endif
1467     }
1468 root 1.65
1469 root 1.186 ev_free (anfds); anfdmax = 0;
1470    
1471 root 1.71 /* have to use the microsoft-never-gets-it-right macro */
1472 root 1.284 array_free (rfeed, EMPTY);
1473 root 1.164 array_free (fdchange, EMPTY);
1474     array_free (timer, EMPTY);
1475 root 1.140 #if EV_PERIODIC_ENABLE
1476 root 1.164 array_free (periodic, EMPTY);
1477 root 1.93 #endif
1478 root 1.187 #if EV_FORK_ENABLE
1479     array_free (fork, EMPTY);
1480     #endif
1481 root 1.164 array_free (prepare, EMPTY);
1482     array_free (check, EMPTY);
1483 root 1.209 #if EV_ASYNC_ENABLE
1484     array_free (async, EMPTY);
1485     #endif
1486 root 1.65
1487 root 1.130 backend = 0;
1488 root 1.56 }
1489 root 1.22
1490 root 1.226 #if EV_USE_INOTIFY
1491 root 1.284 inline_size void infy_fork (EV_P);
1492 root 1.226 #endif
1493 root 1.154
1494 root 1.284 inline_size void
1495 root 1.56 loop_fork (EV_P)
1496     {
1497 root 1.118 #if EV_USE_PORT
1498 root 1.130 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1499 root 1.56 #endif
1500     #if EV_USE_KQUEUE
1501 root 1.130 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1502 root 1.45 #endif
1503 root 1.118 #if EV_USE_EPOLL
1504 root 1.130 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1505 root 1.118 #endif
1506 root 1.154 #if EV_USE_INOTIFY
1507     infy_fork (EV_A);
1508     #endif
1509 root 1.70
1510 root 1.207 if (ev_is_active (&pipeev))
1511 root 1.70 {
1512 root 1.207 /* this "locks" the handlers against writing to the pipe */
1513 root 1.212 /* while we modify the fd vars */
1514     gotsig = 1;
1515     #if EV_ASYNC_ENABLE
1516     gotasync = 1;
1517     #endif
1518 root 1.70
1519     ev_ref (EV_A);
1520 root 1.207 ev_io_stop (EV_A_ &pipeev);
1521 root 1.220
1522     #if EV_USE_EVENTFD
1523     if (evfd >= 0)
1524     close (evfd);
1525     #endif
1526    
1527     if (evpipe [0] >= 0)
1528     {
1529     close (evpipe [0]);
1530     close (evpipe [1]);
1531     }
1532 root 1.207
1533     evpipe_init (EV_A);
1534 root 1.208 /* now iterate over everything, in case we missed something */
1535     pipecb (EV_A_ &pipeev, EV_READ);
1536 root 1.70 }
1537    
1538     postfork = 0;
1539 root 1.1 }
1540    
1541 root 1.55 #if EV_MULTIPLICITY
1542 root 1.250
1543 root 1.54 struct ev_loop *
1544 root 1.108 ev_loop_new (unsigned int flags)
1545 root 1.54 {
1546 root 1.69 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1547    
1548     memset (loop, 0, sizeof (struct ev_loop));
1549 root 1.54
1550 root 1.108 loop_init (EV_A_ flags);
1551 root 1.56
1552 root 1.130 if (ev_backend (EV_A))
1553 root 1.55 return loop;
1554 root 1.54
1555 root 1.55 return 0;
1556 root 1.54 }
1557    
1558     void
1559 root 1.56 ev_loop_destroy (EV_P)
1560 root 1.54 {
1561 root 1.56 loop_destroy (EV_A);
1562 root 1.69 ev_free (loop);
1563 root 1.54 }
1564    
1565 root 1.56 void
1566     ev_loop_fork (EV_P)
1567     {
1568 root 1.205 postfork = 1; /* must be in line with ev_default_fork */
1569 root 1.56 }
1570 root 1.248
1571     #if EV_VERIFY
1572 root 1.258 static void noinline
1573 root 1.251 verify_watcher (EV_P_ W w)
1574     {
1575 root 1.278 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1576 root 1.251
1577     if (w->pending)
1578 root 1.278 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1579 root 1.251 }
1580    
1581     static void noinline
1582     verify_heap (EV_P_ ANHE *heap, int N)
1583     {
1584     int i;
1585    
1586     for (i = HEAP0; i < N + HEAP0; ++i)
1587     {
1588 root 1.278 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1589     assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1590     assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1591 root 1.251
1592     verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1593     }
1594     }
1595    
1596     static void noinline
1597     array_verify (EV_P_ W *ws, int cnt)
1598 root 1.248 {
1599     while (cnt--)
1600 root 1.251 {
1601 root 1.278 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1602 root 1.251 verify_watcher (EV_A_ ws [cnt]);
1603     }
1604 root 1.248 }
1605 root 1.250 #endif
1606 root 1.248
1607 root 1.250 void
1608 root 1.248 ev_loop_verify (EV_P)
1609     {
1610 root 1.250 #if EV_VERIFY
1611 root 1.248 int i;
1612 root 1.251 WL w;
1613    
1614     assert (activecnt >= -1);
1615    
1616     assert (fdchangemax >= fdchangecnt);
1617     for (i = 0; i < fdchangecnt; ++i)
1618 root 1.278 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1619 root 1.251
1620     assert (anfdmax >= 0);
1621     for (i = 0; i < anfdmax; ++i)
1622     for (w = anfds [i].head; w; w = w->next)
1623     {
1624     verify_watcher (EV_A_ (W)w);
1625 root 1.278 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1626     assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1627 root 1.251 }
1628    
1629     assert (timermax >= timercnt);
1630     verify_heap (EV_A_ timers, timercnt);
1631 root 1.248
1632     #if EV_PERIODIC_ENABLE
1633 root 1.251 assert (periodicmax >= periodiccnt);
1634     verify_heap (EV_A_ periodics, periodiccnt);
1635 root 1.248 #endif
1636    
1637 root 1.251 for (i = NUMPRI; i--; )
1638     {
1639     assert (pendingmax [i] >= pendingcnt [i]);
1640 root 1.248 #if EV_IDLE_ENABLE
1641 root 1.252 assert (idleall >= 0);
1642 root 1.251 assert (idlemax [i] >= idlecnt [i]);
1643     array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1644 root 1.248 #endif
1645 root 1.251 }
1646    
1647 root 1.248 #if EV_FORK_ENABLE
1648 root 1.251 assert (forkmax >= forkcnt);
1649     array_verify (EV_A_ (W *)forks, forkcnt);
1650 root 1.248 #endif
1651 root 1.251
1652 root 1.250 #if EV_ASYNC_ENABLE
1653 root 1.251 assert (asyncmax >= asynccnt);
1654     array_verify (EV_A_ (W *)asyncs, asynccnt);
1655 root 1.250 #endif
1656 root 1.251
1657     assert (preparemax >= preparecnt);
1658     array_verify (EV_A_ (W *)prepares, preparecnt);
1659    
1660     assert (checkmax >= checkcnt);
1661     array_verify (EV_A_ (W *)checks, checkcnt);
1662    
1663     # if 0
1664     for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1665     for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1666     # endif
1667 root 1.248 #endif
1668     }
1669    
1670 root 1.250 #endif /* multiplicity */
1671 root 1.56
1672     #if EV_MULTIPLICITY
1673     struct ev_loop *
1674 root 1.125 ev_default_loop_init (unsigned int flags)
1675 root 1.54 #else
1676     int
1677 root 1.116 ev_default_loop (unsigned int flags)
1678 root 1.56 #endif
1679 root 1.54 {
1680 root 1.116 if (!ev_default_loop_ptr)
1681 root 1.56 {
1682     #if EV_MULTIPLICITY
1683 root 1.116 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1684 root 1.56 #else
1685 ayin 1.117 ev_default_loop_ptr = 1;
1686 root 1.54 #endif
1687    
1688 root 1.110 loop_init (EV_A_ flags);
1689 root 1.56
1690 root 1.130 if (ev_backend (EV_A))
1691 root 1.56 {
1692 root 1.103 #ifndef _WIN32
1693 root 1.56 ev_signal_init (&childev, childcb, SIGCHLD);
1694     ev_set_priority (&childev, EV_MAXPRI);
1695     ev_signal_start (EV_A_ &childev);
1696     ev_unref (EV_A); /* child watcher should not keep loop alive */
1697     #endif
1698     }
1699     else
1700 root 1.116 ev_default_loop_ptr = 0;
1701 root 1.56 }
1702 root 1.8
1703 root 1.116 return ev_default_loop_ptr;
1704 root 1.1 }
1705    
1706 root 1.24 void
1707 root 1.56 ev_default_destroy (void)
1708 root 1.1 {
1709 root 1.57 #if EV_MULTIPLICITY
1710 root 1.116 struct ev_loop *loop = ev_default_loop_ptr;
1711 root 1.57 #endif
1712 root 1.56
1713 root 1.266 ev_default_loop_ptr = 0;
1714    
1715 root 1.103 #ifndef _WIN32
1716 root 1.56 ev_ref (EV_A); /* child watcher */
1717     ev_signal_stop (EV_A_ &childev);
1718 root 1.71 #endif
1719 root 1.56
1720     loop_destroy (EV_A);
1721 root 1.1 }
1722    
1723 root 1.24 void
1724 root 1.60 ev_default_fork (void)
1725 root 1.1 {
1726 root 1.60 #if EV_MULTIPLICITY
1727 root 1.116 struct ev_loop *loop = ev_default_loop_ptr;
1728 root 1.60 #endif
1729    
1730 root 1.270 postfork = 1; /* must be in line with ev_loop_fork */
1731 root 1.1 }
1732    
1733 root 1.8 /*****************************************************************************/
1734    
1735 root 1.168 void
1736     ev_invoke (EV_P_ void *w, int revents)
1737     {
1738     EV_CB_INVOKE ((W)w, revents);
1739     }
1740    
1741 root 1.284 inline_speed void
1742 root 1.51 call_pending (EV_P)
1743 root 1.1 {
1744 root 1.42 int pri;
1745    
1746     for (pri = NUMPRI; pri--; )
1747     while (pendingcnt [pri])
1748     {
1749     ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1750 root 1.1
1751 root 1.122 if (expect_true (p->w))
1752 root 1.42 {
1753 root 1.278 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1754 root 1.139
1755 root 1.42 p->w->pending = 0;
1756 root 1.82 EV_CB_INVOKE (p->w, p->events);
1757 root 1.250 EV_FREQUENT_CHECK;
1758 root 1.42 }
1759     }
1760 root 1.1 }
1761    
1762 root 1.234 #if EV_IDLE_ENABLE
1763 root 1.284 inline_size void
1764 root 1.234 idle_reify (EV_P)
1765     {
1766     if (expect_false (idleall))
1767     {
1768     int pri;
1769    
1770     for (pri = NUMPRI; pri--; )
1771     {
1772     if (pendingcnt [pri])
1773     break;
1774    
1775     if (idlecnt [pri])
1776     {
1777     queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1778     break;
1779     }
1780     }
1781     }
1782     }
1783     #endif
1784    
1785 root 1.284 inline_size void
1786 root 1.51 timers_reify (EV_P)
1787 root 1.1 {
1788 root 1.248 EV_FREQUENT_CHECK;
1789    
1790 root 1.284 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1791 root 1.1 {
1792 root 1.284 do
1793     {
1794     ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1795 root 1.1
1796 root 1.284 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1797    
1798     /* first reschedule or stop timer */
1799     if (w->repeat)
1800     {
1801     ev_at (w) += w->repeat;
1802     if (ev_at (w) < mn_now)
1803     ev_at (w) = mn_now;
1804 root 1.61
1805 root 1.284 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1806 root 1.90
1807 root 1.284 ANHE_at_cache (timers [HEAP0]);
1808     downheap (timers, timercnt, HEAP0);
1809     }
1810     else
1811     ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1812 root 1.243
1813 root 1.284 EV_FREQUENT_CHECK;
1814     feed_reverse (EV_A_ (W)w);
1815 root 1.12 }
1816 root 1.284 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1817 root 1.30
1818 root 1.284 feed_reverse_done (EV_A_ EV_TIMEOUT);
1819 root 1.12 }
1820     }
1821 root 1.4
1822 root 1.140 #if EV_PERIODIC_ENABLE
1823 root 1.284 inline_size void
1824 root 1.51 periodics_reify (EV_P)
1825 root 1.12 {
1826 root 1.248 EV_FREQUENT_CHECK;
1827 root 1.250
1828 root 1.244 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1829 root 1.12 {
1830 root 1.284 int feed_count = 0;
1831    
1832     do
1833     {
1834     ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1835 root 1.1
1836 root 1.284 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1837 root 1.61
1838 root 1.284 /* first reschedule or stop timer */
1839     if (w->reschedule_cb)
1840     {
1841     ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1842 root 1.243
1843 root 1.284 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1844 root 1.243
1845 root 1.284 ANHE_at_cache (periodics [HEAP0]);
1846     downheap (periodics, periodiccnt, HEAP0);
1847     }
1848     else if (w->interval)
1849 root 1.246 {
1850 root 1.284 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1851     /* if next trigger time is not sufficiently in the future, put it there */
1852     /* this might happen because of floating point inexactness */
1853     if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1854     {
1855     ev_at (w) += w->interval;
1856    
1857     /* if interval is unreasonably low we might still have a time in the past */
1858     /* so correct this. this will make the periodic very inexact, but the user */
1859     /* has effectively asked to get triggered more often than possible */
1860     if (ev_at (w) < ev_rt_now)
1861     ev_at (w) = ev_rt_now;
1862     }
1863 root 1.243
1864 root 1.284 ANHE_at_cache (periodics [HEAP0]);
1865     downheap (periodics, periodiccnt, HEAP0);
1866 root 1.246 }
1867 root 1.284 else
1868     ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1869 root 1.243
1870 root 1.284 EV_FREQUENT_CHECK;
1871     feed_reverse (EV_A_ (W)w);
1872 root 1.1 }
1873 root 1.284 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1874 root 1.12
1875 root 1.284 feed_reverse_done (EV_A_ EV_PERIODIC);
1876 root 1.12 }
1877     }
1878    
1879 root 1.140 static void noinline
1880 root 1.54 periodics_reschedule (EV_P)
1881 root 1.12 {
1882     int i;
1883    
1884 root 1.13 /* adjust periodics after time jump */
1885 root 1.241 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1886 root 1.12 {
1887 root 1.241 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1888 root 1.12
1889 root 1.77 if (w->reschedule_cb)
1890 root 1.228 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1891 root 1.77 else if (w->interval)
1892 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1893 root 1.242
1894 root 1.248 ANHE_at_cache (periodics [i]);
1895 root 1.77 }
1896 root 1.12
1897 root 1.248 reheap (periodics, periodiccnt);
1898 root 1.1 }
1899 root 1.93 #endif
1900 root 1.1
1901 root 1.285 static void noinline
1902     timers_reschedule (EV_P_ ev_tstamp adjust)
1903     {
1904     int i;
1905    
1906     for (i = 0; i < timercnt; ++i)
1907     {
1908     ANHE *he = timers + i + HEAP0;
1909     ANHE_w (*he)->at += adjust;
1910     ANHE_at_cache (*he);
1911     }
1912     }
1913    
1914 root 1.284 inline_speed void
1915 root 1.178 time_update (EV_P_ ev_tstamp max_block)
1916 root 1.4 {
1917     int i;
1918 root 1.12
1919 root 1.40 #if EV_USE_MONOTONIC
1920     if (expect_true (have_monotonic))
1921     {
1922 root 1.178 ev_tstamp odiff = rtmn_diff;
1923    
1924     mn_now = get_clock ();
1925    
1926     /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1927     /* interpolate in the meantime */
1928     if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1929 root 1.40 {
1930 root 1.178 ev_rt_now = rtmn_diff + mn_now;
1931     return;
1932     }
1933    
1934     now_floor = mn_now;
1935     ev_rt_now = ev_time ();
1936 root 1.4
1937 root 1.178 /* loop a few times, before making important decisions.
1938     * on the choice of "4": one iteration isn't enough,
1939     * in case we get preempted during the calls to
1940     * ev_time and get_clock. a second call is almost guaranteed
1941     * to succeed in that case, though. and looping a few more times
1942     * doesn't hurt either as we only do this on time-jumps or
1943     * in the unlikely event of having been preempted here.
1944     */
1945     for (i = 4; --i; )
1946     {
1947     rtmn_diff = ev_rt_now - mn_now;
1948 root 1.4
1949 root 1.234 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1950 root 1.178 return; /* all is well */
1951 root 1.4
1952 root 1.178 ev_rt_now = ev_time ();
1953     mn_now = get_clock ();
1954     now_floor = mn_now;
1955     }
1956 root 1.4
1957 root 1.285 /* no timer adjustment, as the monotonic clock doesn't jump */
1958     /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1959 root 1.140 # if EV_PERIODIC_ENABLE
1960 root 1.178 periodics_reschedule (EV_A);
1961 root 1.93 # endif
1962 root 1.4 }
1963     else
1964 root 1.40 #endif
1965 root 1.4 {
1966 root 1.85 ev_rt_now = ev_time ();
1967 root 1.40
1968 root 1.178 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1969 root 1.13 {
1970 root 1.285 /* adjust timers. this is easy, as the offset is the same for all of them */
1971     timers_reschedule (EV_A_ ev_rt_now - mn_now);
1972 root 1.140 #if EV_PERIODIC_ENABLE
1973 root 1.54 periodics_reschedule (EV_A);
1974 root 1.93 #endif
1975 root 1.13 }
1976 root 1.4
1977 root 1.85 mn_now = ev_rt_now;
1978 root 1.4 }
1979     }
1980    
1981 root 1.51 static int loop_done;
1982    
1983     void
1984     ev_loop (EV_P_ int flags)
1985 root 1.1 {
1986 root 1.219 loop_done = EVUNLOOP_CANCEL;
1987 root 1.1
1988 root 1.158 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1989    
1990 root 1.161 do
1991 root 1.9 {
1992 root 1.250 #if EV_VERIFY >= 2
1993     ev_loop_verify (EV_A);
1994     #endif
1995    
1996 root 1.158 #ifndef _WIN32
1997     if (expect_false (curpid)) /* penalise the forking check even more */
1998     if (expect_false (getpid () != curpid))
1999     {
2000     curpid = getpid ();
2001     postfork = 1;
2002     }
2003     #endif
2004    
2005 root 1.157 #if EV_FORK_ENABLE
2006     /* we might have forked, so queue fork handlers */
2007     if (expect_false (postfork))
2008     if (forkcnt)
2009     {
2010     queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2011     call_pending (EV_A);
2012     }
2013     #endif
2014 root 1.147
2015 root 1.170 /* queue prepare watchers (and execute them) */
2016 root 1.40 if (expect_false (preparecnt))
2017 root 1.20 {
2018 root 1.51 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2019     call_pending (EV_A);
2020 root 1.20 }
2021 root 1.9
2022 root 1.70 /* we might have forked, so reify kernel state if necessary */
2023     if (expect_false (postfork))
2024     loop_fork (EV_A);
2025    
2026 root 1.1 /* update fd-related kernel structures */
2027 root 1.51 fd_reify (EV_A);
2028 root 1.1
2029     /* calculate blocking time */
2030 root 1.135 {
2031 root 1.193 ev_tstamp waittime = 0.;
2032     ev_tstamp sleeptime = 0.;
2033 root 1.12
2034 root 1.193 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2035 root 1.135 {
2036     /* update time to cancel out callback processing overhead */
2037 root 1.178 time_update (EV_A_ 1e100);
2038 root 1.135
2039 root 1.287 waittime = MAX_BLOCKTIME;
2040    
2041 root 1.135 if (timercnt)
2042     {
2043 root 1.241 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2044 root 1.193 if (waittime > to) waittime = to;
2045 root 1.135 }
2046 root 1.4
2047 root 1.140 #if EV_PERIODIC_ENABLE
2048 root 1.135 if (periodiccnt)
2049     {
2050 root 1.241 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2051 root 1.193 if (waittime > to) waittime = to;
2052 root 1.135 }
2053 root 1.93 #endif
2054 root 1.4
2055 root 1.193 if (expect_false (waittime < timeout_blocktime))
2056     waittime = timeout_blocktime;
2057    
2058     sleeptime = waittime - backend_fudge;
2059    
2060     if (expect_true (sleeptime > io_blocktime))
2061     sleeptime = io_blocktime;
2062    
2063     if (sleeptime)
2064     {
2065     ev_sleep (sleeptime);
2066     waittime -= sleeptime;
2067     }
2068 root 1.135 }
2069 root 1.1
2070 root 1.162 ++loop_count;
2071 root 1.193 backend_poll (EV_A_ waittime);
2072 root 1.178
2073     /* update ev_rt_now, do magic */
2074 root 1.193 time_update (EV_A_ waittime + sleeptime);
2075 root 1.135 }
2076 root 1.1
2077 root 1.9 /* queue pending timers and reschedule them */
2078 root 1.51 timers_reify (EV_A); /* relative timers called last */
2079 root 1.140 #if EV_PERIODIC_ENABLE
2080 root 1.51 periodics_reify (EV_A); /* absolute timers called first */
2081 root 1.93 #endif
2082 root 1.1
2083 root 1.164 #if EV_IDLE_ENABLE
2084 root 1.137 /* queue idle watchers unless other events are pending */
2085 root 1.164 idle_reify (EV_A);
2086     #endif
2087 root 1.9
2088 root 1.20 /* queue check watchers, to be executed first */
2089 root 1.123 if (expect_false (checkcnt))
2090 root 1.51 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2091 root 1.9
2092 root 1.51 call_pending (EV_A);
2093 root 1.1 }
2094 root 1.219 while (expect_true (
2095     activecnt
2096     && !loop_done
2097     && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2098     ));
2099 root 1.13
2100 root 1.135 if (loop_done == EVUNLOOP_ONE)
2101     loop_done = EVUNLOOP_CANCEL;
2102 root 1.51 }
2103    
2104     void
2105     ev_unloop (EV_P_ int how)
2106     {
2107     loop_done = how;
2108 root 1.1 }
2109    
2110 root 1.285 void
2111     ev_ref (EV_P)
2112     {
2113     ++activecnt;
2114     }
2115    
2116     void
2117     ev_unref (EV_P)
2118     {
2119     --activecnt;
2120     }
2121    
2122     void
2123     ev_now_update (EV_P)
2124     {
2125     time_update (EV_A_ 1e100);
2126     }
2127    
2128     void
2129     ev_suspend (EV_P)
2130     {
2131     ev_now_update (EV_A);
2132     }
2133    
2134     void
2135     ev_resume (EV_P)
2136     {
2137     ev_tstamp mn_prev = mn_now;
2138    
2139     ev_now_update (EV_A);
2140     timers_reschedule (EV_A_ mn_now - mn_prev);
2141 root 1.286 #if EV_PERIODIC_ENABLE
2142 root 1.285 periodics_reschedule (EV_A);
2143 root 1.286 #endif
2144 root 1.285 }
2145    
2146 root 1.8 /*****************************************************************************/
2147    
2148 root 1.284 inline_size void
2149 root 1.10 wlist_add (WL *head, WL elem)
2150 root 1.1 {
2151     elem->next = *head;
2152     *head = elem;
2153     }
2154    
2155 root 1.284 inline_size void
2156 root 1.10 wlist_del (WL *head, WL elem)
2157 root 1.1 {
2158     while (*head)
2159     {
2160     if (*head == elem)
2161     {
2162     *head = elem->next;
2163     return;
2164     }
2165    
2166     head = &(*head)->next;
2167     }
2168     }
2169    
2170 root 1.284 inline_speed void
2171 root 1.166 clear_pending (EV_P_ W w)
2172 root 1.16 {
2173     if (w->pending)
2174     {
2175 root 1.42 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2176 root 1.16 w->pending = 0;
2177     }
2178     }
2179    
2180 root 1.167 int
2181     ev_clear_pending (EV_P_ void *w)
2182 root 1.166 {
2183     W w_ = (W)w;
2184     int pending = w_->pending;
2185    
2186 root 1.172 if (expect_true (pending))
2187     {
2188     ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2189     w_->pending = 0;
2190     p->w = 0;
2191     return p->events;
2192     }
2193     else
2194 root 1.167 return 0;
2195 root 1.166 }
2196    
2197 root 1.284 inline_size void
2198 root 1.164 pri_adjust (EV_P_ W w)
2199     {
2200     int pri = w->priority;
2201     pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2202     pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2203     w->priority = pri;
2204     }
2205    
2206 root 1.284 inline_speed void
2207 root 1.51 ev_start (EV_P_ W w, int active)
2208 root 1.1 {
2209 root 1.164 pri_adjust (EV_A_ w);
2210 root 1.1 w->active = active;
2211 root 1.51 ev_ref (EV_A);
2212 root 1.1 }
2213    
2214 root 1.284 inline_size void
2215 root 1.51 ev_stop (EV_P_ W w)
2216 root 1.1 {
2217 root 1.51 ev_unref (EV_A);
2218 root 1.1 w->active = 0;
2219     }
2220    
2221 root 1.8 /*****************************************************************************/
2222    
2223 root 1.171 void noinline
2224 root 1.136 ev_io_start (EV_P_ ev_io *w)
2225 root 1.1 {
2226 root 1.37 int fd = w->fd;
2227    
2228 root 1.123 if (expect_false (ev_is_active (w)))
2229 root 1.1 return;
2230    
2231 root 1.278 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2232 root 1.281 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2233 root 1.33
2234 root 1.248 EV_FREQUENT_CHECK;
2235    
2236 root 1.51 ev_start (EV_A_ (W)w, 1);
2237 root 1.265 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2238 root 1.182 wlist_add (&anfds[fd].head, (WL)w);
2239 root 1.1
2240 root 1.281 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2241     w->events &= ~EV__IOFDSET;
2242 root 1.248
2243     EV_FREQUENT_CHECK;
2244 root 1.1 }
2245    
2246 root 1.171 void noinline
2247 root 1.136 ev_io_stop (EV_P_ ev_io *w)
2248 root 1.1 {
2249 root 1.166 clear_pending (EV_A_ (W)w);
2250 root 1.123 if (expect_false (!ev_is_active (w)))
2251 root 1.1 return;
2252    
2253 root 1.278 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2254 root 1.89
2255 root 1.248 EV_FREQUENT_CHECK;
2256    
2257 root 1.182 wlist_del (&anfds[w->fd].head, (WL)w);
2258 root 1.51 ev_stop (EV_A_ (W)w);
2259 root 1.1
2260 root 1.184 fd_change (EV_A_ w->fd, 1);
2261 root 1.248
2262     EV_FREQUENT_CHECK;
2263 root 1.1 }
2264    
2265 root 1.171 void noinline
2266 root 1.136 ev_timer_start (EV_P_ ev_timer *w)
2267 root 1.1 {
2268 root 1.123 if (expect_false (ev_is_active (w)))
2269 root 1.1 return;
2270    
2271 root 1.228 ev_at (w) += mn_now;
2272 root 1.12
2273 root 1.278 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2274 root 1.13
2275 root 1.248 EV_FREQUENT_CHECK;
2276    
2277     ++timercnt;
2278     ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2279 root 1.241 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2280     ANHE_w (timers [ev_active (w)]) = (WT)w;
2281 root 1.248 ANHE_at_cache (timers [ev_active (w)]);
2282 root 1.235 upheap (timers, ev_active (w));
2283 root 1.62
2284 root 1.248 EV_FREQUENT_CHECK;
2285    
2286 root 1.278 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2287 root 1.12 }
2288    
2289 root 1.171 void noinline
2290 root 1.136 ev_timer_stop (EV_P_ ev_timer *w)
2291 root 1.12 {
2292 root 1.166 clear_pending (EV_A_ (W)w);
2293 root 1.123 if (expect_false (!ev_is_active (w)))
2294 root 1.12 return;
2295    
2296 root 1.248 EV_FREQUENT_CHECK;
2297    
2298 root 1.230 {
2299     int active = ev_active (w);
2300 root 1.62
2301 root 1.278 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2302 root 1.151
2303 root 1.248 --timercnt;
2304    
2305     if (expect_true (active < timercnt + HEAP0))
2306 root 1.151 {
2307 root 1.248 timers [active] = timers [timercnt + HEAP0];
2308 root 1.181 adjustheap (timers, timercnt, active);
2309 root 1.151 }
2310 root 1.248 }
2311 root 1.228
2312 root 1.248 EV_FREQUENT_CHECK;
2313 root 1.4
2314 root 1.228 ev_at (w) -= mn_now;
2315 root 1.14
2316 root 1.51 ev_stop (EV_A_ (W)w);
2317 root 1.12 }
2318 root 1.4
2319 root 1.171 void noinline
2320 root 1.136 ev_timer_again (EV_P_ ev_timer *w)
2321 root 1.14 {
2322 root 1.248 EV_FREQUENT_CHECK;
2323    
2324 root 1.14 if (ev_is_active (w))
2325     {
2326     if (w->repeat)
2327 root 1.99 {
2328 root 1.228 ev_at (w) = mn_now + w->repeat;
2329 root 1.248 ANHE_at_cache (timers [ev_active (w)]);
2330 root 1.230 adjustheap (timers, timercnt, ev_active (w));
2331 root 1.99 }
2332 root 1.14 else
2333 root 1.51 ev_timer_stop (EV_A_ w);
2334 root 1.14 }
2335     else if (w->repeat)
2336 root 1.112 {
2337 root 1.229 ev_at (w) = w->repeat;
2338 root 1.112 ev_timer_start (EV_A_ w);
2339     }
2340 root 1.248
2341     EV_FREQUENT_CHECK;
2342 root 1.14 }
2343    
2344 root 1.140 #if EV_PERIODIC_ENABLE
2345 root 1.171 void noinline
2346 root 1.136 ev_periodic_start (EV_P_ ev_periodic *w)
2347 root 1.12 {
2348 root 1.123 if (expect_false (ev_is_active (w)))
2349 root 1.12 return;
2350 root 1.1
2351 root 1.77 if (w->reschedule_cb)
2352 root 1.228 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2353 root 1.77 else if (w->interval)
2354     {
2355 root 1.278 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2356 root 1.77 /* this formula differs from the one in periodic_reify because we do not always round up */
2357 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2358 root 1.77 }
2359 root 1.173 else
2360 root 1.228 ev_at (w) = w->offset;
2361 root 1.12
2362 root 1.248 EV_FREQUENT_CHECK;
2363    
2364     ++periodiccnt;
2365     ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2366 root 1.241 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2367     ANHE_w (periodics [ev_active (w)]) = (WT)w;
2368 root 1.248 ANHE_at_cache (periodics [ev_active (w)]);
2369 root 1.235 upheap (periodics, ev_active (w));
2370 root 1.62
2371 root 1.248 EV_FREQUENT_CHECK;
2372    
2373 root 1.278 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2374 root 1.1 }
2375    
2376 root 1.171 void noinline
2377 root 1.136 ev_periodic_stop (EV_P_ ev_periodic *w)
2378 root 1.1 {
2379 root 1.166 clear_pending (EV_A_ (W)w);
2380 root 1.123 if (expect_false (!ev_is_active (w)))
2381 root 1.1 return;
2382    
2383 root 1.248 EV_FREQUENT_CHECK;
2384    
2385 root 1.230 {
2386     int active = ev_active (w);
2387 root 1.62
2388 root 1.278 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2389 root 1.151
2390 root 1.248 --periodiccnt;
2391    
2392     if (expect_true (active < periodiccnt + HEAP0))
2393 root 1.151 {
2394 root 1.248 periodics [active] = periodics [periodiccnt + HEAP0];
2395 root 1.181 adjustheap (periodics, periodiccnt, active);
2396 root 1.151 }
2397 root 1.248 }
2398 root 1.228
2399 root 1.248 EV_FREQUENT_CHECK;
2400 root 1.2
2401 root 1.51 ev_stop (EV_A_ (W)w);
2402 root 1.1 }
2403    
2404 root 1.171 void noinline
2405 root 1.136 ev_periodic_again (EV_P_ ev_periodic *w)
2406 root 1.77 {
2407 root 1.84 /* TODO: use adjustheap and recalculation */
2408 root 1.77 ev_periodic_stop (EV_A_ w);
2409     ev_periodic_start (EV_A_ w);
2410     }
2411 root 1.93 #endif
2412 root 1.77
2413 root 1.56 #ifndef SA_RESTART
2414     # define SA_RESTART 0
2415     #endif
2416    
2417 root 1.171 void noinline
2418 root 1.136 ev_signal_start (EV_P_ ev_signal *w)
2419 root 1.56 {
2420     #if EV_MULTIPLICITY
2421 root 1.278 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2422 root 1.56 #endif
2423 root 1.123 if (expect_false (ev_is_active (w)))
2424 root 1.56 return;
2425    
2426 root 1.278 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2427 root 1.56
2428 root 1.207 evpipe_init (EV_A);
2429    
2430 root 1.248 EV_FREQUENT_CHECK;
2431    
2432 root 1.180 {
2433     #ifndef _WIN32
2434     sigset_t full, prev;
2435     sigfillset (&full);
2436     sigprocmask (SIG_SETMASK, &full, &prev);
2437     #endif
2438    
2439 root 1.265 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2440 root 1.180
2441     #ifndef _WIN32
2442     sigprocmask (SIG_SETMASK, &prev, 0);
2443     #endif
2444     }
2445    
2446 root 1.56 ev_start (EV_A_ (W)w, 1);
2447 root 1.182 wlist_add (&signals [w->signum - 1].head, (WL)w);
2448 root 1.56
2449 root 1.63 if (!((WL)w)->next)
2450 root 1.56 {
2451 root 1.103 #if _WIN32
2452 root 1.218 signal (w->signum, ev_sighandler);
2453 root 1.67 #else
2454 root 1.56 struct sigaction sa;
2455 root 1.218 sa.sa_handler = ev_sighandler;
2456 root 1.56 sigfillset (&sa.sa_mask);
2457     sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2458     sigaction (w->signum, &sa, 0);
2459 root 1.67 #endif
2460 root 1.56 }
2461 root 1.248
2462     EV_FREQUENT_CHECK;
2463 root 1.56 }
2464    
2465 root 1.171 void noinline
2466 root 1.136 ev_signal_stop (EV_P_ ev_signal *w)
2467 root 1.56 {
2468 root 1.166 clear_pending (EV_A_ (W)w);
2469 root 1.123 if (expect_false (!ev_is_active (w)))
2470 root 1.56 return;
2471    
2472 root 1.248 EV_FREQUENT_CHECK;
2473    
2474 root 1.182 wlist_del (&signals [w->signum - 1].head, (WL)w);
2475 root 1.56 ev_stop (EV_A_ (W)w);
2476    
2477     if (!signals [w->signum - 1].head)
2478     signal (w->signum, SIG_DFL);
2479 root 1.248
2480     EV_FREQUENT_CHECK;
2481 root 1.56 }
2482    
2483 root 1.28 void
2484 root 1.136 ev_child_start (EV_P_ ev_child *w)
2485 root 1.22 {
2486 root 1.56 #if EV_MULTIPLICITY
2487 root 1.278 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2488 root 1.56 #endif
2489 root 1.123 if (expect_false (ev_is_active (w)))
2490 root 1.22 return;
2491    
2492 root 1.248 EV_FREQUENT_CHECK;
2493    
2494 root 1.51 ev_start (EV_A_ (W)w, 1);
2495 root 1.182 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2496 root 1.248
2497     EV_FREQUENT_CHECK;
2498 root 1.22 }
2499    
2500 root 1.28 void
2501 root 1.136 ev_child_stop (EV_P_ ev_child *w)
2502 root 1.22 {
2503 root 1.166 clear_pending (EV_A_ (W)w);
2504 root 1.123 if (expect_false (!ev_is_active (w)))
2505 root 1.22 return;
2506    
2507 root 1.248 EV_FREQUENT_CHECK;
2508    
2509 root 1.182 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2510 root 1.51 ev_stop (EV_A_ (W)w);
2511 root 1.248
2512     EV_FREQUENT_CHECK;
2513 root 1.22 }
2514    
2515 root 1.140 #if EV_STAT_ENABLE
2516    
2517     # ifdef _WIN32
2518 root 1.146 # undef lstat
2519     # define lstat(a,b) _stati64 (a,b)
2520 root 1.140 # endif
2521    
2522 root 1.273 #define DEF_STAT_INTERVAL 5.0074891
2523     #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2524     #define MIN_STAT_INTERVAL 0.1074891
2525 root 1.143
2526 root 1.157 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2527 root 1.152
2528     #if EV_USE_INOTIFY
2529 root 1.153 # define EV_INOTIFY_BUFSIZE 8192
2530 root 1.152
2531     static void noinline
2532     infy_add (EV_P_ ev_stat *w)
2533     {
2534     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);
2535    
2536     if (w->wd < 0)
2537     {
2538 root 1.273 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2539     ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2540 root 1.152
2541     /* monitor some parent directory for speedup hints */
2542 root 1.271 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2543 root 1.233 /* but an efficiency issue only */
2544 root 1.153 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2545 root 1.152 {
2546 root 1.153 char path [4096];
2547 root 1.152 strcpy (path, w->path);
2548    
2549     do
2550     {
2551     int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2552     | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2553    
2554     char *pend = strrchr (path, '/');
2555    
2556 root 1.275 if (!pend || pend == path)
2557     break;
2558 root 1.152
2559     *pend = 0;
2560 root 1.153 w->wd = inotify_add_watch (fs_fd, path, mask);
2561 root 1.152 }
2562     while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2563     }
2564     }
2565 root 1.275
2566     if (w->wd >= 0)
2567 root 1.273 {
2568     wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2569    
2570     /* now local changes will be tracked by inotify, but remote changes won't */
2571     /* unless the filesystem it known to be local, we therefore still poll */
2572     /* also do poll on <2.6.25, but with normal frequency */
2573     struct statfs sfs;
2574    
2575     if (fs_2625 && !statfs (w->path, &sfs))
2576     if (sfs.f_type == 0x1373 /* devfs */
2577     || sfs.f_type == 0xEF53 /* ext2/3 */
2578     || sfs.f_type == 0x3153464a /* jfs */
2579     || sfs.f_type == 0x52654973 /* reiser3 */
2580     || sfs.f_type == 0x01021994 /* tempfs */
2581     || sfs.f_type == 0x58465342 /* xfs */)
2582     return;
2583 root 1.152
2584 root 1.273 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2585     ev_timer_again (EV_A_ &w->timer);
2586     }
2587 root 1.152 }
2588    
2589     static void noinline
2590     infy_del (EV_P_ ev_stat *w)
2591     {
2592     int slot;
2593     int wd = w->wd;
2594    
2595     if (wd < 0)
2596     return;
2597    
2598     w->wd = -2;
2599     slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2600     wlist_del (&fs_hash [slot].head, (WL)w);
2601    
2602     /* remove this watcher, if others are watching it, they will rearm */
2603     inotify_rm_watch (fs_fd, wd);
2604     }
2605    
2606     static void noinline
2607     infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2608     {
2609     if (slot < 0)
2610 root 1.264 /* overflow, need to check for all hash slots */
2611 root 1.152 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2612     infy_wd (EV_A_ slot, wd, ev);
2613     else
2614     {
2615     WL w_;
2616    
2617     for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2618     {
2619     ev_stat *w = (ev_stat *)w_;
2620     w_ = w_->next; /* lets us remove this watcher and all before it */
2621    
2622     if (w->wd == wd || wd == -1)
2623     {
2624     if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2625     {
2626 root 1.275 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2627 root 1.152 w->wd = -1;
2628     infy_add (EV_A_ w); /* re-add, no matter what */
2629     }
2630    
2631 root 1.153 stat_timer_cb (EV_A_ &w->timer, 0);
2632 root 1.152 }
2633     }
2634     }
2635     }
2636    
2637     static void
2638     infy_cb (EV_P_ ev_io *w, int revents)
2639     {
2640     char buf [EV_INOTIFY_BUFSIZE];
2641     struct inotify_event *ev = (struct inotify_event *)buf;
2642     int ofs;
2643     int len = read (fs_fd, buf, sizeof (buf));
2644    
2645     for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2646     infy_wd (EV_A_ ev->wd, ev->wd, ev);
2647     }
2648    
2649 root 1.284 inline_size void
2650 root 1.273 check_2625 (EV_P)
2651 root 1.152 {
2652 root 1.264 /* kernels < 2.6.25 are borked
2653     * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2654     */
2655 root 1.273 struct utsname buf;
2656     int major, minor, micro;
2657    
2658     if (uname (&buf))
2659     return;
2660    
2661     if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2662     return;
2663    
2664     if (major < 2
2665     || (major == 2 && minor < 6)
2666     || (major == 2 && minor == 6 && micro < 25))
2667     return;
2668 root 1.264
2669 root 1.273 fs_2625 = 1;
2670     }
2671 root 1.264
2672 root 1.284 inline_size void
2673 root 1.273 infy_init (EV_P)
2674     {
2675     if (fs_fd != -2)
2676     return;
2677 root 1.264
2678 root 1.273 fs_fd = -1;
2679 root 1.264
2680 root 1.273 check_2625 (EV_A);
2681 root 1.264
2682 root 1.152 fs_fd = inotify_init ();
2683    
2684     if (fs_fd >= 0)
2685     {
2686     ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2687     ev_set_priority (&fs_w, EV_MAXPRI);
2688     ev_io_start (EV_A_ &fs_w);
2689     }
2690     }
2691    
2692 root 1.284 inline_size void
2693 root 1.154 infy_fork (EV_P)
2694     {
2695     int slot;
2696    
2697     if (fs_fd < 0)
2698     return;
2699    
2700     close (fs_fd);
2701     fs_fd = inotify_init ();
2702    
2703     for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2704     {
2705     WL w_ = fs_hash [slot].head;
2706     fs_hash [slot].head = 0;
2707    
2708     while (w_)
2709     {
2710     ev_stat *w = (ev_stat *)w_;
2711     w_ = w_->next; /* lets us add this watcher */
2712    
2713     w->wd = -1;
2714    
2715     if (fs_fd >= 0)
2716     infy_add (EV_A_ w); /* re-add, no matter what */
2717     else
2718 root 1.273 ev_timer_again (EV_A_ &w->timer);
2719 root 1.154 }
2720     }
2721     }
2722    
2723 root 1.152 #endif
2724    
2725 root 1.255 #ifdef _WIN32
2726     # define EV_LSTAT(p,b) _stati64 (p, b)
2727     #else
2728     # define EV_LSTAT(p,b) lstat (p, b)
2729     #endif
2730    
2731 root 1.140 void
2732     ev_stat_stat (EV_P_ ev_stat *w)
2733     {
2734     if (lstat (w->path, &w->attr) < 0)
2735     w->attr.st_nlink = 0;
2736     else if (!w->attr.st_nlink)
2737     w->attr.st_nlink = 1;
2738     }
2739    
2740 root 1.157 static void noinline
2741 root 1.140 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2742     {
2743     ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2744    
2745     /* we copy this here each the time so that */
2746     /* prev has the old value when the callback gets invoked */
2747     w->prev = w->attr;
2748     ev_stat_stat (EV_A_ w);
2749    
2750 root 1.156 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2751     if (
2752     w->prev.st_dev != w->attr.st_dev
2753     || w->prev.st_ino != w->attr.st_ino
2754     || w->prev.st_mode != w->attr.st_mode
2755     || w->prev.st_nlink != w->attr.st_nlink
2756     || w->prev.st_uid != w->attr.st_uid
2757     || w->prev.st_gid != w->attr.st_gid
2758     || w->prev.st_rdev != w->attr.st_rdev
2759     || w->prev.st_size != w->attr.st_size
2760     || w->prev.st_atime != w->attr.st_atime
2761     || w->prev.st_mtime != w->attr.st_mtime
2762     || w->prev.st_ctime != w->attr.st_ctime
2763     ) {
2764 root 1.152 #if EV_USE_INOTIFY
2765 root 1.264 if (fs_fd >= 0)
2766     {
2767     infy_del (EV_A_ w);
2768     infy_add (EV_A_ w);
2769     ev_stat_stat (EV_A_ w); /* avoid race... */
2770     }
2771 root 1.152 #endif
2772    
2773     ev_feed_event (EV_A_ w, EV_STAT);
2774     }
2775 root 1.140 }
2776    
2777     void
2778     ev_stat_start (EV_P_ ev_stat *w)
2779     {
2780     if (expect_false (ev_is_active (w)))
2781     return;
2782    
2783     ev_stat_stat (EV_A_ w);
2784    
2785 root 1.273 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2786     w->interval = MIN_STAT_INTERVAL;
2787 root 1.143
2788 root 1.273 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2789 root 1.140 ev_set_priority (&w->timer, ev_priority (w));
2790 root 1.152
2791     #if EV_USE_INOTIFY
2792     infy_init (EV_A);
2793    
2794     if (fs_fd >= 0)
2795     infy_add (EV_A_ w);
2796     else
2797     #endif
2798 root 1.273 ev_timer_again (EV_A_ &w->timer);
2799 root 1.140
2800     ev_start (EV_A_ (W)w, 1);
2801 root 1.248
2802     EV_FREQUENT_CHECK;
2803 root 1.140 }
2804    
2805     void
2806     ev_stat_stop (EV_P_ ev_stat *w)
2807     {
2808 root 1.166 clear_pending (EV_A_ (W)w);
2809 root 1.140 if (expect_false (!ev_is_active (w)))
2810     return;
2811    
2812 root 1.248 EV_FREQUENT_CHECK;
2813    
2814 root 1.152 #if EV_USE_INOTIFY
2815     infy_del (EV_A_ w);
2816     #endif
2817 root 1.140 ev_timer_stop (EV_A_ &w->timer);
2818    
2819 root 1.134 ev_stop (EV_A_ (W)w);
2820 root 1.248
2821     EV_FREQUENT_CHECK;
2822 root 1.134 }
2823     #endif
2824    
2825 root 1.164 #if EV_IDLE_ENABLE
2826 root 1.144 void
2827     ev_idle_start (EV_P_ ev_idle *w)
2828     {
2829     if (expect_false (ev_is_active (w)))
2830     return;
2831    
2832 root 1.164 pri_adjust (EV_A_ (W)w);
2833    
2834 root 1.248 EV_FREQUENT_CHECK;
2835    
2836 root 1.164 {
2837     int active = ++idlecnt [ABSPRI (w)];
2838    
2839     ++idleall;
2840     ev_start (EV_A_ (W)w, active);
2841    
2842     array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2843     idles [ABSPRI (w)][active - 1] = w;
2844     }
2845 root 1.248
2846     EV_FREQUENT_CHECK;
2847 root 1.144 }
2848    
2849     void
2850     ev_idle_stop (EV_P_ ev_idle *w)
2851     {
2852 root 1.166 clear_pending (EV_A_ (W)w);
2853 root 1.144 if (expect_false (!ev_is_active (w)))
2854     return;
2855    
2856 root 1.248 EV_FREQUENT_CHECK;
2857    
2858 root 1.144 {
2859 root 1.230 int active = ev_active (w);
2860 root 1.164
2861     idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2862 root 1.230 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2863 root 1.164
2864     ev_stop (EV_A_ (W)w);
2865     --idleall;
2866 root 1.144 }
2867 root 1.248
2868     EV_FREQUENT_CHECK;
2869 root 1.144 }
2870 root 1.164 #endif
2871 root 1.144
2872     void
2873     ev_prepare_start (EV_P_ ev_prepare *w)
2874     {
2875     if (expect_false (ev_is_active (w)))
2876     return;
2877    
2878 root 1.248 EV_FREQUENT_CHECK;
2879    
2880 root 1.144 ev_start (EV_A_ (W)w, ++preparecnt);
2881     array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2882     prepares [preparecnt - 1] = w;
2883 root 1.248
2884     EV_FREQUENT_CHECK;
2885 root 1.144 }
2886    
2887     void
2888     ev_prepare_stop (EV_P_ ev_prepare *w)
2889     {
2890 root 1.166 clear_pending (EV_A_ (W)w);
2891 root 1.144 if (expect_false (!ev_is_active (w)))
2892     return;
2893    
2894 root 1.248 EV_FREQUENT_CHECK;
2895    
2896 root 1.144 {
2897 root 1.230 int active = ev_active (w);
2898    
2899 root 1.144 prepares [active - 1] = prepares [--preparecnt];
2900 root 1.230 ev_active (prepares [active - 1]) = active;
2901 root 1.144 }
2902    
2903     ev_stop (EV_A_ (W)w);
2904 root 1.248
2905     EV_FREQUENT_CHECK;
2906 root 1.144 }
2907    
2908     void
2909     ev_check_start (EV_P_ ev_check *w)
2910     {
2911     if (expect_false (ev_is_active (w)))
2912     return;
2913    
2914 root 1.248 EV_FREQUENT_CHECK;
2915    
2916 root 1.144 ev_start (EV_A_ (W)w, ++checkcnt);
2917     array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2918     checks [checkcnt - 1] = w;
2919 root 1.248
2920     EV_FREQUENT_CHECK;
2921 root 1.144 }
2922    
2923     void
2924     ev_check_stop (EV_P_ ev_check *w)
2925     {
2926 root 1.166 clear_pending (EV_A_ (W)w);
2927 root 1.144 if (expect_false (!ev_is_active (w)))
2928     return;
2929    
2930 root 1.248 EV_FREQUENT_CHECK;
2931    
2932 root 1.144 {
2933 root 1.230 int active = ev_active (w);
2934    
2935 root 1.144 checks [active - 1] = checks [--checkcnt];
2936 root 1.230 ev_active (checks [active - 1]) = active;
2937 root 1.144 }
2938    
2939     ev_stop (EV_A_ (W)w);
2940 root 1.248
2941     EV_FREQUENT_CHECK;
2942 root 1.144 }
2943    
2944     #if EV_EMBED_ENABLE
2945     void noinline
2946     ev_embed_sweep (EV_P_ ev_embed *w)
2947     {
2948 root 1.188 ev_loop (w->other, EVLOOP_NONBLOCK);
2949 root 1.144 }
2950    
2951     static void
2952 root 1.189 embed_io_cb (EV_P_ ev_io *io, int revents)
2953 root 1.144 {
2954     ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2955    
2956     if (ev_cb (w))
2957     ev_feed_event (EV_A_ (W)w, EV_EMBED);
2958     else
2959 root 1.195 ev_loop (w->other, EVLOOP_NONBLOCK);
2960 root 1.144 }
2961    
2962 root 1.189 static void
2963     embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2964     {
2965     ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2966    
2967 root 1.195 {
2968     struct ev_loop *loop = w->other;
2969    
2970     while (fdchangecnt)
2971     {
2972     fd_reify (EV_A);
2973     ev_loop (EV_A_ EVLOOP_NONBLOCK);
2974     }
2975     }
2976     }
2977    
2978 root 1.261 static void
2979     embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2980     {
2981     ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2982    
2983 root 1.277 ev_embed_stop (EV_A_ w);
2984    
2985 root 1.261 {
2986     struct ev_loop *loop = w->other;
2987    
2988     ev_loop_fork (EV_A);
2989 root 1.277 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2990 root 1.261 }
2991 root 1.277
2992     ev_embed_start (EV_A_ w);
2993 root 1.261 }
2994    
2995 root 1.195 #if 0
2996     static void
2997     embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2998     {
2999     ev_idle_stop (EV_A_ idle);
3000 root 1.189 }
3001 root 1.195 #endif
3002 root 1.189
3003 root 1.144 void
3004     ev_embed_start (EV_P_ ev_embed *w)
3005     {
3006     if (expect_false (ev_is_active (w)))
3007     return;
3008    
3009     {
3010 root 1.188 struct ev_loop *loop = w->other;
3011 root 1.278 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3012 root 1.191 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3013 root 1.144 }
3014    
3015 root 1.248 EV_FREQUENT_CHECK;
3016    
3017 root 1.144 ev_set_priority (&w->io, ev_priority (w));
3018     ev_io_start (EV_A_ &w->io);
3019    
3020 root 1.189 ev_prepare_init (&w->prepare, embed_prepare_cb);
3021     ev_set_priority (&w->prepare, EV_MINPRI);
3022     ev_prepare_start (EV_A_ &w->prepare);
3023    
3024 root 1.261 ev_fork_init (&w->fork, embed_fork_cb);
3025     ev_fork_start (EV_A_ &w->fork);
3026    
3027 root 1.195 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3028    
3029 root 1.144 ev_start (EV_A_ (W)w, 1);
3030 root 1.248
3031     EV_FREQUENT_CHECK;
3032 root 1.144 }
3033    
3034     void
3035     ev_embed_stop (EV_P_ ev_embed *w)
3036     {
3037 root 1.166 clear_pending (EV_A_ (W)w);
3038 root 1.144 if (expect_false (!ev_is_active (w)))
3039     return;
3040    
3041 root 1.248 EV_FREQUENT_CHECK;
3042    
3043 root 1.261 ev_io_stop (EV_A_ &w->io);
3044 root 1.189 ev_prepare_stop (EV_A_ &w->prepare);
3045 root 1.261 ev_fork_stop (EV_A_ &w->fork);
3046 root 1.248
3047     EV_FREQUENT_CHECK;
3048 root 1.144 }
3049     #endif
3050    
3051 root 1.147 #if EV_FORK_ENABLE
3052     void
3053     ev_fork_start (EV_P_ ev_fork *w)
3054     {
3055     if (expect_false (ev_is_active (w)))
3056     return;
3057    
3058 root 1.248 EV_FREQUENT_CHECK;
3059    
3060 root 1.147 ev_start (EV_A_ (W)w, ++forkcnt);
3061     array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3062     forks [forkcnt - 1] = w;
3063 root 1.248
3064     EV_FREQUENT_CHECK;
3065 root 1.147 }
3066    
3067     void
3068     ev_fork_stop (EV_P_ ev_fork *w)
3069     {
3070 root 1.166 clear_pending (EV_A_ (W)w);
3071 root 1.147 if (expect_false (!ev_is_active (w)))
3072     return;
3073    
3074 root 1.248 EV_FREQUENT_CHECK;
3075    
3076 root 1.147 {
3077 root 1.230 int active = ev_active (w);
3078    
3079 root 1.147 forks [active - 1] = forks [--forkcnt];
3080 root 1.230 ev_active (forks [active - 1]) = active;
3081 root 1.147 }
3082    
3083     ev_stop (EV_A_ (W)w);
3084 root 1.248
3085     EV_FREQUENT_CHECK;
3086 root 1.147 }
3087     #endif
3088    
3089 root 1.207 #if EV_ASYNC_ENABLE
3090     void
3091     ev_async_start (EV_P_ ev_async *w)
3092     {
3093     if (expect_false (ev_is_active (w)))
3094     return;
3095    
3096     evpipe_init (EV_A);
3097    
3098 root 1.248 EV_FREQUENT_CHECK;
3099    
3100 root 1.207 ev_start (EV_A_ (W)w, ++asynccnt);
3101     array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3102     asyncs [asynccnt - 1] = w;
3103 root 1.248
3104     EV_FREQUENT_CHECK;
3105 root 1.207 }
3106    
3107     void
3108     ev_async_stop (EV_P_ ev_async *w)
3109     {
3110     clear_pending (EV_A_ (W)w);
3111     if (expect_false (!ev_is_active (w)))
3112     return;
3113    
3114 root 1.248 EV_FREQUENT_CHECK;
3115    
3116 root 1.207 {
3117 root 1.230 int active = ev_active (w);
3118    
3119 root 1.207 asyncs [active - 1] = asyncs [--asynccnt];
3120 root 1.230 ev_active (asyncs [active - 1]) = active;
3121 root 1.207 }
3122    
3123     ev_stop (EV_A_ (W)w);
3124 root 1.248
3125     EV_FREQUENT_CHECK;
3126 root 1.207 }
3127    
3128     void
3129     ev_async_send (EV_P_ ev_async *w)
3130     {
3131     w->sent = 1;
3132 root 1.214 evpipe_write (EV_A_ &gotasync);
3133 root 1.207 }
3134     #endif
3135    
3136 root 1.1 /*****************************************************************************/
3137 root 1.10
3138 root 1.16 struct ev_once
3139     {
3140 root 1.136 ev_io io;
3141     ev_timer to;
3142 root 1.16 void (*cb)(int revents, void *arg);
3143     void *arg;
3144     };
3145    
3146     static void
3147 root 1.51 once_cb (EV_P_ struct ev_once *once, int revents)
3148 root 1.16 {
3149     void (*cb)(int revents, void *arg) = once->cb;
3150     void *arg = once->arg;
3151    
3152 root 1.259 ev_io_stop (EV_A_ &once->io);
3153 root 1.51 ev_timer_stop (EV_A_ &once->to);
3154 root 1.69 ev_free (once);
3155 root 1.16
3156     cb (revents, arg);
3157     }
3158    
3159     static void
3160 root 1.136 once_cb_io (EV_P_ ev_io *w, int revents)
3161 root 1.16 {
3162 root 1.262 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3163    
3164     once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3165 root 1.16 }
3166    
3167     static void
3168 root 1.136 once_cb_to (EV_P_ ev_timer *w, int revents)
3169 root 1.16 {
3170 root 1.262 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3171    
3172     once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3173 root 1.16 }
3174    
3175     void
3176 root 1.51 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3177 root 1.16 {
3178 root 1.74 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3179 root 1.16
3180 root 1.123 if (expect_false (!once))
3181 root 1.16 {
3182 root 1.123 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3183     return;
3184     }
3185    
3186     once->cb = cb;
3187     once->arg = arg;
3188 root 1.16
3189 root 1.123 ev_init (&once->io, once_cb_io);
3190     if (fd >= 0)
3191     {
3192     ev_io_set (&once->io, fd, events);
3193     ev_io_start (EV_A_ &once->io);
3194     }
3195 root 1.16
3196 root 1.123 ev_init (&once->to, once_cb_to);
3197     if (timeout >= 0.)
3198     {
3199     ev_timer_set (&once->to, timeout, 0.);
3200     ev_timer_start (EV_A_ &once->to);
3201 root 1.16 }
3202     }
3203    
3204 root 1.282 /*****************************************************************************/
3205    
3206     #if 0
3207     void
3208     ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3209     {
3210     int i, j;
3211     ev_watcher_list *wl, *wn;
3212    
3213     if (types & (EV_IO | EV_EMBED))
3214     for (i = 0; i < anfdmax; ++i)
3215     for (wl = anfds [i].head; wl; )
3216     {
3217     wn = wl->next;
3218    
3219     #if EV_EMBED_ENABLE
3220     if (ev_cb ((ev_io *)wl) == embed_io_cb)
3221     {
3222     if (types & EV_EMBED)
3223     cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3224     }
3225     else
3226     #endif
3227     #if EV_USE_INOTIFY
3228     if (ev_cb ((ev_io *)wl) == infy_cb)
3229     ;
3230     else
3231     #endif
3232     if ((ev_io *)wl != &pipeev)
3233     if (types & EV_IO)
3234     cb (EV_A_ EV_IO, wl);
3235    
3236     wl = wn;
3237     }
3238    
3239     if (types & (EV_TIMER | EV_STAT))
3240     for (i = timercnt + HEAP0; i-- > HEAP0; )
3241     #if EV_STAT_ENABLE
3242     /*TODO: timer is not always active*/
3243     if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3244     {
3245     if (types & EV_STAT)
3246     cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3247     }
3248     else
3249     #endif
3250     if (types & EV_TIMER)
3251     cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3252    
3253     #if EV_PERIODIC_ENABLE
3254     if (types & EV_PERIODIC)
3255     for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3256     cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3257     #endif
3258    
3259     #if EV_IDLE_ENABLE
3260     if (types & EV_IDLE)
3261     for (j = NUMPRI; i--; )
3262     for (i = idlecnt [j]; i--; )
3263     cb (EV_A_ EV_IDLE, idles [j][i]);
3264     #endif
3265    
3266     #if EV_FORK_ENABLE
3267     if (types & EV_FORK)
3268     for (i = forkcnt; i--; )
3269     if (ev_cb (forks [i]) != embed_fork_cb)
3270     cb (EV_A_ EV_FORK, forks [i]);
3271     #endif
3272    
3273     #if EV_ASYNC_ENABLE
3274     if (types & EV_ASYNC)
3275     for (i = asynccnt; i--; )
3276     cb (EV_A_ EV_ASYNC, asyncs [i]);
3277     #endif
3278    
3279     if (types & EV_PREPARE)
3280     for (i = preparecnt; i--; )
3281     #if EV_EMBED_ENABLE
3282     if (ev_cb (prepares [i]) != embed_prepare_cb)
3283     #endif
3284     cb (EV_A_ EV_PREPARE, prepares [i]);
3285    
3286     if (types & EV_CHECK)
3287     for (i = checkcnt; i--; )
3288     cb (EV_A_ EV_CHECK, checks [i]);
3289    
3290     if (types & EV_SIGNAL)
3291     for (i = 0; i < signalmax; ++i)
3292     for (wl = signals [i].head; wl; )
3293     {
3294     wn = wl->next;
3295     cb (EV_A_ EV_SIGNAL, wl);
3296     wl = wn;
3297     }
3298    
3299     if (types & EV_CHILD)
3300     for (i = EV_PID_HASHSIZE; i--; )
3301     for (wl = childs [i]; wl; )
3302     {
3303     wn = wl->next;
3304     cb (EV_A_ EV_CHILD, wl);
3305     wl = wn;
3306     }
3307     /* EV_STAT 0x00001000 /* stat data changed */
3308     /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3309     }
3310     #endif
3311    
3312 root 1.188 #if EV_MULTIPLICITY
3313     #include "ev_wrap.h"
3314     #endif
3315    
3316 root 1.87 #ifdef __cplusplus
3317     }
3318     #endif
3319