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Revision: 1.314
Committed: Wed Aug 26 17:31:20 2009 UTC (14 years, 8 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.313: +27 -2 lines
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File Contents

# 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 root 1.290 # elif !defined(EV_USE_CLOCK_SYSCALL)
63     # define EV_USE_CLOCK_SYSCALL 0
64 root 1.274 # endif
65    
66 root 1.60 # if HAVE_CLOCK_GETTIME
67 root 1.97 # ifndef EV_USE_MONOTONIC
68     # define EV_USE_MONOTONIC 1
69     # endif
70     # ifndef EV_USE_REALTIME
71 root 1.279 # define EV_USE_REALTIME 0
72 root 1.97 # endif
73 root 1.126 # else
74     # ifndef EV_USE_MONOTONIC
75     # define EV_USE_MONOTONIC 0
76     # endif
77     # ifndef EV_USE_REALTIME
78     # define EV_USE_REALTIME 0
79     # endif
80 root 1.60 # endif
81    
82 root 1.193 # ifndef EV_USE_NANOSLEEP
83     # if HAVE_NANOSLEEP
84     # define EV_USE_NANOSLEEP 1
85     # else
86     # define EV_USE_NANOSLEEP 0
87     # endif
88     # endif
89    
90 root 1.127 # ifndef EV_USE_SELECT
91     # if HAVE_SELECT && HAVE_SYS_SELECT_H
92     # define EV_USE_SELECT 1
93     # else
94     # define EV_USE_SELECT 0
95     # endif
96 root 1.60 # endif
97    
98 root 1.127 # ifndef EV_USE_POLL
99     # if HAVE_POLL && HAVE_POLL_H
100     # define EV_USE_POLL 1
101     # else
102     # define EV_USE_POLL 0
103     # endif
104 root 1.60 # endif
105 root 1.127
106     # ifndef EV_USE_EPOLL
107     # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108     # define EV_USE_EPOLL 1
109     # else
110     # define EV_USE_EPOLL 0
111     # endif
112 root 1.60 # endif
113 root 1.127
114     # ifndef EV_USE_KQUEUE
115     # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
116     # define EV_USE_KQUEUE 1
117     # else
118     # define EV_USE_KQUEUE 0
119     # endif
120 root 1.60 # endif
121 root 1.127
122     # ifndef EV_USE_PORT
123     # if HAVE_PORT_H && HAVE_PORT_CREATE
124     # define EV_USE_PORT 1
125     # else
126     # define EV_USE_PORT 0
127     # endif
128 root 1.118 # endif
129    
130 root 1.152 # ifndef EV_USE_INOTIFY
131     # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132     # define EV_USE_INOTIFY 1
133     # else
134     # define EV_USE_INOTIFY 0
135     # endif
136     # endif
137    
138 root 1.303 # ifndef EV_USE_SIGNALFD
139     # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140     # define EV_USE_SIGNALFD 1
141     # else
142     # define EV_USE_SIGNALFD 0
143     # endif
144     # endif
145    
146 root 1.220 # ifndef EV_USE_EVENTFD
147     # if HAVE_EVENTFD
148     # define EV_USE_EVENTFD 1
149     # else
150     # define EV_USE_EVENTFD 0
151     # endif
152     # endif
153 root 1.250
154 root 1.29 #endif
155 root 1.17
156 root 1.1 #include <math.h>
157     #include <stdlib.h>
158 root 1.7 #include <fcntl.h>
159 root 1.16 #include <stddef.h>
160 root 1.1
161     #include <stdio.h>
162    
163 root 1.4 #include <assert.h>
164 root 1.1 #include <errno.h>
165 root 1.22 #include <sys/types.h>
166 root 1.71 #include <time.h>
167    
168 root 1.72 #include <signal.h>
169 root 1.71
170 root 1.152 #ifdef EV_H
171     # include EV_H
172     #else
173     # include "ev.h"
174     #endif
175    
176 root 1.103 #ifndef _WIN32
177 root 1.71 # include <sys/time.h>
178 root 1.45 # include <sys/wait.h>
179 root 1.140 # include <unistd.h>
180 root 1.103 #else
181 root 1.256 # include <io.h>
182 root 1.103 # define WIN32_LEAN_AND_MEAN
183     # include <windows.h>
184     # ifndef EV_SELECT_IS_WINSOCKET
185     # define EV_SELECT_IS_WINSOCKET 1
186     # endif
187 root 1.45 #endif
188 root 1.103
189 root 1.220 /* this block tries to deduce configuration from header-defined symbols and defaults */
190 root 1.40
191 root 1.305 /* try to deduce the maximum number of signals on this platform */
192     #if defined (EV_NSIG)
193     /* use what's provided */
194     #elif defined (NSIG)
195     # define EV_NSIG (NSIG)
196     #elif defined(_NSIG)
197     # define EV_NSIG (_NSIG)
198     #elif defined (SIGMAX)
199     # define EV_NSIG (SIGMAX+1)
200     #elif defined (SIG_MAX)
201     # define EV_NSIG (SIG_MAX+1)
202     #elif defined (_SIG_MAX)
203     # define EV_NSIG (_SIG_MAX+1)
204     #elif defined (MAXSIG)
205     # define EV_NSIG (MAXSIG+1)
206     #elif defined (MAX_SIG)
207     # define EV_NSIG (MAX_SIG+1)
208     #elif defined (SIGARRAYSIZE)
209     # define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
210     #elif defined (_sys_nsig)
211     # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
212     #else
213     # error "unable to find value for NSIG, please report"
214     /* to make it compile regardless, just remove the above line */
215 root 1.306 # define EV_NSIG 65
216 root 1.305 #endif
217    
218 root 1.274 #ifndef EV_USE_CLOCK_SYSCALL
219     # if __linux && __GLIBC__ >= 2
220     # define EV_USE_CLOCK_SYSCALL 1
221     # else
222     # define EV_USE_CLOCK_SYSCALL 0
223     # endif
224     #endif
225    
226 root 1.29 #ifndef EV_USE_MONOTONIC
227 root 1.253 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
228     # define EV_USE_MONOTONIC 1
229     # else
230     # define EV_USE_MONOTONIC 0
231     # endif
232 root 1.37 #endif
233    
234 root 1.118 #ifndef EV_USE_REALTIME
235 root 1.279 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
236 root 1.118 #endif
237    
238 root 1.193 #ifndef EV_USE_NANOSLEEP
239 root 1.253 # if _POSIX_C_SOURCE >= 199309L
240     # define EV_USE_NANOSLEEP 1
241     # else
242     # define EV_USE_NANOSLEEP 0
243     # endif
244 root 1.193 #endif
245    
246 root 1.29 #ifndef EV_USE_SELECT
247     # define EV_USE_SELECT 1
248 root 1.10 #endif
249    
250 root 1.59 #ifndef EV_USE_POLL
251 root 1.104 # ifdef _WIN32
252     # define EV_USE_POLL 0
253     # else
254     # define EV_USE_POLL 1
255     # endif
256 root 1.41 #endif
257    
258 root 1.29 #ifndef EV_USE_EPOLL
259 root 1.220 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
260     # define EV_USE_EPOLL 1
261     # else
262     # define EV_USE_EPOLL 0
263     # endif
264 root 1.10 #endif
265    
266 root 1.44 #ifndef EV_USE_KQUEUE
267     # define EV_USE_KQUEUE 0
268     #endif
269    
270 root 1.118 #ifndef EV_USE_PORT
271     # define EV_USE_PORT 0
272 root 1.40 #endif
273    
274 root 1.152 #ifndef EV_USE_INOTIFY
275 root 1.220 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
276     # define EV_USE_INOTIFY 1
277     # else
278     # define EV_USE_INOTIFY 0
279     # endif
280 root 1.152 #endif
281    
282 root 1.149 #ifndef EV_PID_HASHSIZE
283     # if EV_MINIMAL
284     # define EV_PID_HASHSIZE 1
285     # else
286     # define EV_PID_HASHSIZE 16
287     # endif
288     #endif
289    
290 root 1.152 #ifndef EV_INOTIFY_HASHSIZE
291     # if EV_MINIMAL
292     # define EV_INOTIFY_HASHSIZE 1
293     # else
294     # define EV_INOTIFY_HASHSIZE 16
295     # endif
296     #endif
297    
298 root 1.220 #ifndef EV_USE_EVENTFD
299     # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
300     # define EV_USE_EVENTFD 1
301     # else
302     # define EV_USE_EVENTFD 0
303     # endif
304     #endif
305    
306 root 1.303 #ifndef EV_USE_SIGNALFD
307 root 1.314 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
308 root 1.303 # define EV_USE_SIGNALFD 1
309     # else
310     # define EV_USE_SIGNALFD 0
311     # endif
312     #endif
313    
314 root 1.249 #if 0 /* debugging */
315 root 1.250 # define EV_VERIFY 3
316 root 1.249 # define EV_USE_4HEAP 1
317     # define EV_HEAP_CACHE_AT 1
318     #endif
319    
320 root 1.250 #ifndef EV_VERIFY
321     # define EV_VERIFY !EV_MINIMAL
322     #endif
323    
324 root 1.243 #ifndef EV_USE_4HEAP
325     # define EV_USE_4HEAP !EV_MINIMAL
326     #endif
327    
328     #ifndef EV_HEAP_CACHE_AT
329     # define EV_HEAP_CACHE_AT !EV_MINIMAL
330     #endif
331    
332 root 1.291 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
333     /* which makes programs even slower. might work on other unices, too. */
334     #if EV_USE_CLOCK_SYSCALL
335     # include <syscall.h>
336     # ifdef SYS_clock_gettime
337     # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
338     # undef EV_USE_MONOTONIC
339     # define EV_USE_MONOTONIC 1
340     # else
341     # undef EV_USE_CLOCK_SYSCALL
342     # define EV_USE_CLOCK_SYSCALL 0
343     # endif
344     #endif
345    
346 root 1.220 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
347 root 1.40
348     #ifndef CLOCK_MONOTONIC
349     # undef EV_USE_MONOTONIC
350     # define EV_USE_MONOTONIC 0
351     #endif
352    
353 root 1.31 #ifndef CLOCK_REALTIME
354 root 1.40 # undef EV_USE_REALTIME
355 root 1.31 # define EV_USE_REALTIME 0
356     #endif
357 root 1.40
358 root 1.152 #if !EV_STAT_ENABLE
359 root 1.185 # undef EV_USE_INOTIFY
360 root 1.152 # define EV_USE_INOTIFY 0
361     #endif
362    
363 root 1.193 #if !EV_USE_NANOSLEEP
364     # ifndef _WIN32
365     # include <sys/select.h>
366     # endif
367     #endif
368    
369 root 1.152 #if EV_USE_INOTIFY
370 root 1.264 # include <sys/utsname.h>
371 root 1.273 # include <sys/statfs.h>
372 root 1.152 # include <sys/inotify.h>
373 root 1.263 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
374     # ifndef IN_DONT_FOLLOW
375     # undef EV_USE_INOTIFY
376     # define EV_USE_INOTIFY 0
377     # endif
378 root 1.152 #endif
379    
380 root 1.185 #if EV_SELECT_IS_WINSOCKET
381     # include <winsock.h>
382     #endif
383    
384 root 1.220 #if EV_USE_EVENTFD
385     /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
386 root 1.221 # include <stdint.h>
387 root 1.303 # ifndef EFD_NONBLOCK
388     # define EFD_NONBLOCK O_NONBLOCK
389     # endif
390     # ifndef EFD_CLOEXEC
391 root 1.311 # ifdef O_CLOEXEC
392     # define EFD_CLOEXEC O_CLOEXEC
393     # else
394     # define EFD_CLOEXEC 02000000
395     # endif
396 root 1.303 # endif
397 root 1.222 # ifdef __cplusplus
398     extern "C" {
399     # endif
400 root 1.220 int eventfd (unsigned int initval, int flags);
401 root 1.222 # ifdef __cplusplus
402     }
403     # endif
404 root 1.220 #endif
405    
406 root 1.303 #if EV_USE_SIGNALFD
407 root 1.314 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
408     # include <stdint.h>
409     # ifndef SFD_NONBLOCK
410     # define SFD_NONBLOCK O_NONBLOCK
411     # endif
412     # ifndef SFD_CLOEXEC
413     # ifdef O_CLOEXEC
414     # define SFD_CLOEXEC O_CLOEXEC
415     # else
416     # define SFD_CLOEXEC 02000000
417     # endif
418     # endif
419     # ifdef __cplusplus
420     extern "C" {
421     # endif
422     int signalfd (int fd, const sigset_t *mask, int flags);
423    
424     struct signalfd_siginfo
425     {
426     uint32_t ssi_signo;
427     char pad[128 - sizeof (uint32_t)];
428     };
429     # ifdef __cplusplus
430     }
431     # endif
432 root 1.303 #endif
433    
434 root 1.314
435 root 1.40 /**/
436 root 1.1
437 root 1.250 #if EV_VERIFY >= 3
438 root 1.248 # define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
439     #else
440     # define EV_FREQUENT_CHECK do { } while (0)
441     #endif
442    
443 root 1.176 /*
444     * This is used to avoid floating point rounding problems.
445     * It is added to ev_rt_now when scheduling periodics
446     * to ensure progress, time-wise, even when rounding
447     * errors are against us.
448 root 1.177 * This value is good at least till the year 4000.
449 root 1.176 * Better solutions welcome.
450     */
451     #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
452    
453 root 1.4 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
454 root 1.120 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
455 root 1.176 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
456 root 1.1
457 root 1.185 #if __GNUC__ >= 4
458 root 1.40 # define expect(expr,value) __builtin_expect ((expr),(value))
459 root 1.169 # define noinline __attribute__ ((noinline))
460 root 1.40 #else
461     # define expect(expr,value) (expr)
462 root 1.140 # define noinline
463 root 1.223 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
464 root 1.169 # define inline
465     # endif
466 root 1.40 #endif
467    
468     #define expect_false(expr) expect ((expr) != 0, 0)
469     #define expect_true(expr) expect ((expr) != 0, 1)
470 root 1.169 #define inline_size static inline
471    
472     #if EV_MINIMAL
473     # define inline_speed static noinline
474     #else
475     # define inline_speed static inline
476     #endif
477 root 1.40
478 root 1.295 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
479    
480     #if EV_MINPRI == EV_MAXPRI
481     # define ABSPRI(w) (((W)w), 0)
482     #else
483     # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
484     #endif
485 root 1.42
486 root 1.164 #define EMPTY /* required for microsofts broken pseudo-c compiler */
487 root 1.114 #define EMPTY2(a,b) /* used to suppress some warnings */
488 root 1.103
489 root 1.136 typedef ev_watcher *W;
490     typedef ev_watcher_list *WL;
491     typedef ev_watcher_time *WT;
492 root 1.10
493 root 1.229 #define ev_active(w) ((W)(w))->active
494 root 1.228 #define ev_at(w) ((WT)(w))->at
495    
496 root 1.279 #if EV_USE_REALTIME
497 root 1.194 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
498     /* giving it a reasonably high chance of working on typical architetcures */
499 root 1.279 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
500     #endif
501    
502     #if EV_USE_MONOTONIC
503 root 1.207 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
504 root 1.198 #endif
505 root 1.54
506 root 1.313 #ifndef EV_FD_TO_WIN32_HANDLE
507     # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
508     #endif
509     #ifndef EV_WIN32_HANDLE_TO_FD
510     # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (fd, 0)
511     #endif
512     #ifndef EV_WIN32_CLOSE_FD
513     # define EV_WIN32_CLOSE_FD(fd) close (fd)
514     #endif
515    
516 root 1.103 #ifdef _WIN32
517 root 1.98 # include "ev_win32.c"
518     #endif
519 root 1.67
520 root 1.53 /*****************************************************************************/
521 root 1.1
522 root 1.70 static void (*syserr_cb)(const char *msg);
523 root 1.69
524 root 1.141 void
525     ev_set_syserr_cb (void (*cb)(const char *msg))
526 root 1.69 {
527     syserr_cb = cb;
528     }
529    
530 root 1.141 static void noinline
531 root 1.269 ev_syserr (const char *msg)
532 root 1.69 {
533 root 1.70 if (!msg)
534     msg = "(libev) system error";
535    
536 root 1.69 if (syserr_cb)
537 root 1.70 syserr_cb (msg);
538 root 1.69 else
539     {
540 root 1.70 perror (msg);
541 root 1.69 abort ();
542     }
543     }
544    
545 root 1.224 static void *
546     ev_realloc_emul (void *ptr, long size)
547     {
548     /* some systems, notably openbsd and darwin, fail to properly
549     * implement realloc (x, 0) (as required by both ansi c-98 and
550     * the single unix specification, so work around them here.
551     */
552    
553     if (size)
554     return realloc (ptr, size);
555    
556     free (ptr);
557     return 0;
558     }
559    
560     static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
561 root 1.69
562 root 1.141 void
563 root 1.155 ev_set_allocator (void *(*cb)(void *ptr, long size))
564 root 1.69 {
565     alloc = cb;
566     }
567    
568 root 1.150 inline_speed void *
569 root 1.155 ev_realloc (void *ptr, long size)
570 root 1.69 {
571 root 1.224 ptr = alloc (ptr, size);
572 root 1.69
573     if (!ptr && size)
574     {
575 root 1.155 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
576 root 1.69 abort ();
577     }
578    
579     return ptr;
580     }
581    
582     #define ev_malloc(size) ev_realloc (0, (size))
583     #define ev_free(ptr) ev_realloc ((ptr), 0)
584    
585     /*****************************************************************************/
586    
587 root 1.298 /* set in reify when reification needed */
588     #define EV_ANFD_REIFY 1
589    
590 root 1.288 /* file descriptor info structure */
591 root 1.53 typedef struct
592     {
593 root 1.68 WL head;
594 root 1.288 unsigned char events; /* the events watched for */
595 root 1.298 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
596 root 1.288 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
597 root 1.269 unsigned char unused;
598     #if EV_USE_EPOLL
599 root 1.288 unsigned int egen; /* generation counter to counter epoll bugs */
600 root 1.269 #endif
601 root 1.103 #if EV_SELECT_IS_WINSOCKET
602     SOCKET handle;
603     #endif
604 root 1.53 } ANFD;
605 root 1.1
606 root 1.288 /* stores the pending event set for a given watcher */
607 root 1.53 typedef struct
608     {
609     W w;
610 root 1.288 int events; /* the pending event set for the given watcher */
611 root 1.53 } ANPENDING;
612 root 1.51
613 root 1.155 #if EV_USE_INOTIFY
614 root 1.241 /* hash table entry per inotify-id */
615 root 1.152 typedef struct
616     {
617     WL head;
618 root 1.155 } ANFS;
619 root 1.152 #endif
620    
621 root 1.241 /* Heap Entry */
622     #if EV_HEAP_CACHE_AT
623 root 1.288 /* a heap element */
624 root 1.241 typedef struct {
625 root 1.243 ev_tstamp at;
626 root 1.241 WT w;
627     } ANHE;
628    
629 root 1.248 #define ANHE_w(he) (he).w /* access watcher, read-write */
630     #define ANHE_at(he) (he).at /* access cached at, read-only */
631     #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
632 root 1.241 #else
633 root 1.288 /* a heap element */
634 root 1.241 typedef WT ANHE;
635    
636 root 1.248 #define ANHE_w(he) (he)
637     #define ANHE_at(he) (he)->at
638     #define ANHE_at_cache(he)
639 root 1.241 #endif
640    
641 root 1.55 #if EV_MULTIPLICITY
642 root 1.54
643 root 1.80 struct ev_loop
644     {
645 root 1.86 ev_tstamp ev_rt_now;
646 root 1.99 #define ev_rt_now ((loop)->ev_rt_now)
647 root 1.80 #define VAR(name,decl) decl;
648     #include "ev_vars.h"
649     #undef VAR
650     };
651     #include "ev_wrap.h"
652    
653 root 1.116 static struct ev_loop default_loop_struct;
654     struct ev_loop *ev_default_loop_ptr;
655 root 1.54
656 root 1.53 #else
657 root 1.54
658 root 1.86 ev_tstamp ev_rt_now;
659 root 1.80 #define VAR(name,decl) static decl;
660     #include "ev_vars.h"
661     #undef VAR
662    
663 root 1.116 static int ev_default_loop_ptr;
664 root 1.54
665 root 1.51 #endif
666 root 1.1
667 root 1.297 #if EV_MINIMAL < 2
668 root 1.298 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
669     # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
670 root 1.297 # define EV_INVOKE_PENDING invoke_cb (EV_A)
671     #else
672 root 1.298 # define EV_RELEASE_CB (void)0
673     # define EV_ACQUIRE_CB (void)0
674 root 1.297 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
675     #endif
676    
677 root 1.298 #define EVUNLOOP_RECURSE 0x80
678    
679 root 1.8 /*****************************************************************************/
680    
681 root 1.292 #ifndef EV_HAVE_EV_TIME
682 root 1.141 ev_tstamp
683 root 1.1 ev_time (void)
684     {
685 root 1.29 #if EV_USE_REALTIME
686 root 1.279 if (expect_true (have_realtime))
687     {
688     struct timespec ts;
689     clock_gettime (CLOCK_REALTIME, &ts);
690     return ts.tv_sec + ts.tv_nsec * 1e-9;
691     }
692     #endif
693    
694 root 1.1 struct timeval tv;
695     gettimeofday (&tv, 0);
696     return tv.tv_sec + tv.tv_usec * 1e-6;
697     }
698 root 1.292 #endif
699 root 1.1
700 root 1.284 inline_size ev_tstamp
701 root 1.1 get_clock (void)
702     {
703 root 1.29 #if EV_USE_MONOTONIC
704 root 1.40 if (expect_true (have_monotonic))
705 root 1.1 {
706     struct timespec ts;
707     clock_gettime (CLOCK_MONOTONIC, &ts);
708     return ts.tv_sec + ts.tv_nsec * 1e-9;
709     }
710     #endif
711    
712     return ev_time ();
713     }
714    
715 root 1.85 #if EV_MULTIPLICITY
716 root 1.51 ev_tstamp
717     ev_now (EV_P)
718     {
719 root 1.85 return ev_rt_now;
720 root 1.51 }
721 root 1.85 #endif
722 root 1.51
723 root 1.193 void
724     ev_sleep (ev_tstamp delay)
725     {
726     if (delay > 0.)
727     {
728     #if EV_USE_NANOSLEEP
729     struct timespec ts;
730    
731     ts.tv_sec = (time_t)delay;
732     ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
733    
734     nanosleep (&ts, 0);
735     #elif defined(_WIN32)
736 root 1.217 Sleep ((unsigned long)(delay * 1e3));
737 root 1.193 #else
738     struct timeval tv;
739    
740     tv.tv_sec = (time_t)delay;
741     tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
742    
743 root 1.257 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
744 root 1.302 /* something not guaranteed by newer posix versions, but guaranteed */
745 root 1.257 /* by older ones */
746 root 1.193 select (0, 0, 0, 0, &tv);
747     #endif
748     }
749     }
750    
751     /*****************************************************************************/
752    
753 root 1.233 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
754 root 1.232
755 root 1.288 /* find a suitable new size for the given array, */
756     /* hopefully by rounding to a ncie-to-malloc size */
757 root 1.284 inline_size int
758 root 1.163 array_nextsize (int elem, int cur, int cnt)
759     {
760     int ncur = cur + 1;
761    
762     do
763     ncur <<= 1;
764     while (cnt > ncur);
765    
766 root 1.232 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
767     if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
768 root 1.163 {
769     ncur *= elem;
770 root 1.232 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
771 root 1.163 ncur = ncur - sizeof (void *) * 4;
772     ncur /= elem;
773     }
774    
775     return ncur;
776     }
777    
778 root 1.171 static noinline void *
779 root 1.163 array_realloc (int elem, void *base, int *cur, int cnt)
780     {
781     *cur = array_nextsize (elem, *cur, cnt);
782     return ev_realloc (base, elem * *cur);
783     }
784 root 1.29
785 root 1.265 #define array_init_zero(base,count) \
786     memset ((void *)(base), 0, sizeof (*(base)) * (count))
787    
788 root 1.74 #define array_needsize(type,base,cur,cnt,init) \
789 root 1.163 if (expect_false ((cnt) > (cur))) \
790 root 1.69 { \
791 root 1.163 int ocur_ = (cur); \
792     (base) = (type *)array_realloc \
793     (sizeof (type), (base), &(cur), (cnt)); \
794     init ((base) + (ocur_), (cur) - ocur_); \
795 root 1.1 }
796    
797 root 1.163 #if 0
798 root 1.74 #define array_slim(type,stem) \
799 root 1.67 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
800     { \
801     stem ## max = array_roundsize (stem ## cnt >> 1); \
802 root 1.74 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
803 root 1.67 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
804     }
805 root 1.163 #endif
806 root 1.67
807 root 1.65 #define array_free(stem, idx) \
808 root 1.280 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
809 root 1.65
810 root 1.8 /*****************************************************************************/
811    
812 root 1.288 /* dummy callback for pending events */
813     static void noinline
814     pendingcb (EV_P_ ev_prepare *w, int revents)
815     {
816     }
817    
818 root 1.140 void noinline
819 root 1.78 ev_feed_event (EV_P_ void *w, int revents)
820 root 1.1 {
821 root 1.78 W w_ = (W)w;
822 root 1.171 int pri = ABSPRI (w_);
823 root 1.78
824 root 1.123 if (expect_false (w_->pending))
825 root 1.171 pendings [pri][w_->pending - 1].events |= revents;
826     else
827 root 1.32 {
828 root 1.171 w_->pending = ++pendingcnt [pri];
829     array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
830     pendings [pri][w_->pending - 1].w = w_;
831     pendings [pri][w_->pending - 1].events = revents;
832 root 1.32 }
833 root 1.1 }
834    
835 root 1.284 inline_speed void
836     feed_reverse (EV_P_ W w)
837     {
838     array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
839     rfeeds [rfeedcnt++] = w;
840     }
841    
842     inline_size void
843     feed_reverse_done (EV_P_ int revents)
844     {
845     do
846     ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
847     while (rfeedcnt);
848     }
849    
850     inline_speed void
851 root 1.51 queue_events (EV_P_ W *events, int eventcnt, int type)
852 root 1.27 {
853     int i;
854    
855     for (i = 0; i < eventcnt; ++i)
856 root 1.78 ev_feed_event (EV_A_ events [i], type);
857 root 1.27 }
858    
859 root 1.141 /*****************************************************************************/
860    
861 root 1.284 inline_speed void
862 root 1.298 fd_event_nc (EV_P_ int fd, int revents)
863 root 1.1 {
864     ANFD *anfd = anfds + fd;
865 root 1.136 ev_io *w;
866 root 1.1
867 root 1.136 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
868 root 1.1 {
869 root 1.79 int ev = w->events & revents;
870 root 1.1
871     if (ev)
872 root 1.78 ev_feed_event (EV_A_ (W)w, ev);
873 root 1.1 }
874     }
875    
876 root 1.298 /* do not submit kernel events for fds that have reify set */
877     /* because that means they changed while we were polling for new events */
878     inline_speed void
879     fd_event (EV_P_ int fd, int revents)
880     {
881     ANFD *anfd = anfds + fd;
882    
883     if (expect_true (!anfd->reify))
884     fd_event_nc (EV_A_ fd, revents);
885     }
886    
887 root 1.79 void
888     ev_feed_fd_event (EV_P_ int fd, int revents)
889     {
890 root 1.168 if (fd >= 0 && fd < anfdmax)
891 root 1.298 fd_event_nc (EV_A_ fd, revents);
892 root 1.79 }
893    
894 root 1.288 /* make sure the external fd watch events are in-sync */
895     /* with the kernel/libev internal state */
896 root 1.284 inline_size void
897 root 1.51 fd_reify (EV_P)
898 root 1.9 {
899     int i;
900    
901 root 1.27 for (i = 0; i < fdchangecnt; ++i)
902     {
903     int fd = fdchanges [i];
904     ANFD *anfd = anfds + fd;
905 root 1.136 ev_io *w;
906 root 1.27
907 root 1.184 unsigned char events = 0;
908 root 1.27
909 root 1.136 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
910 root 1.184 events |= (unsigned char)w->events;
911 root 1.27
912 root 1.103 #if EV_SELECT_IS_WINSOCKET
913     if (events)
914     {
915 root 1.254 unsigned long arg;
916 root 1.313 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
917 root 1.278 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
918 root 1.103 }
919     #endif
920    
921 root 1.184 {
922     unsigned char o_events = anfd->events;
923     unsigned char o_reify = anfd->reify;
924    
925     anfd->reify = 0;
926     anfd->events = events;
927 root 1.27
928 root 1.281 if (o_events != events || o_reify & EV__IOFDSET)
929 root 1.184 backend_modify (EV_A_ fd, o_events, events);
930     }
931 root 1.27 }
932    
933     fdchangecnt = 0;
934     }
935    
936 root 1.288 /* something about the given fd changed */
937 root 1.284 inline_size void
938 root 1.183 fd_change (EV_P_ int fd, int flags)
939 root 1.27 {
940 root 1.183 unsigned char reify = anfds [fd].reify;
941 root 1.184 anfds [fd].reify |= flags;
942 root 1.27
943 root 1.183 if (expect_true (!reify))
944     {
945     ++fdchangecnt;
946     array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
947     fdchanges [fdchangecnt - 1] = fd;
948     }
949 root 1.9 }
950    
951 root 1.288 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
952 root 1.284 inline_speed void
953 root 1.51 fd_kill (EV_P_ int fd)
954 root 1.41 {
955 root 1.136 ev_io *w;
956 root 1.41
957 root 1.136 while ((w = (ev_io *)anfds [fd].head))
958 root 1.41 {
959 root 1.51 ev_io_stop (EV_A_ w);
960 root 1.78 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
961 root 1.41 }
962     }
963    
964 root 1.288 /* check whether the given fd is atcually valid, for error recovery */
965 root 1.284 inline_size int
966 root 1.71 fd_valid (int fd)
967     {
968 root 1.103 #ifdef _WIN32
969     return _get_osfhandle (fd) != -1;
970 root 1.71 #else
971     return fcntl (fd, F_GETFD) != -1;
972     #endif
973     }
974    
975 root 1.19 /* called on EBADF to verify fds */
976 root 1.140 static void noinline
977 root 1.51 fd_ebadf (EV_P)
978 root 1.19 {
979     int fd;
980    
981     for (fd = 0; fd < anfdmax; ++fd)
982 root 1.27 if (anfds [fd].events)
983 root 1.254 if (!fd_valid (fd) && errno == EBADF)
984 root 1.51 fd_kill (EV_A_ fd);
985 root 1.41 }
986    
987     /* called on ENOMEM in select/poll to kill some fds and retry */
988 root 1.140 static void noinline
989 root 1.51 fd_enomem (EV_P)
990 root 1.41 {
991 root 1.62 int fd;
992 root 1.41
993 root 1.62 for (fd = anfdmax; fd--; )
994 root 1.41 if (anfds [fd].events)
995     {
996 root 1.51 fd_kill (EV_A_ fd);
997 root 1.307 break;
998 root 1.41 }
999 root 1.19 }
1000    
1001 root 1.130 /* usually called after fork if backend needs to re-arm all fds from scratch */
1002 root 1.140 static void noinline
1003 root 1.56 fd_rearm_all (EV_P)
1004     {
1005     int fd;
1006    
1007     for (fd = 0; fd < anfdmax; ++fd)
1008     if (anfds [fd].events)
1009     {
1010     anfds [fd].events = 0;
1011 root 1.268 anfds [fd].emask = 0;
1012 root 1.298 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1013 root 1.56 }
1014     }
1015    
1016 root 1.8 /*****************************************************************************/
1017    
1018 root 1.235 /*
1019 root 1.241 * the heap functions want a real array index. array index 0 uis guaranteed to not
1020     * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1021     * the branching factor of the d-tree.
1022     */
1023    
1024     /*
1025 root 1.235 * at the moment we allow libev the luxury of two heaps,
1026     * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1027     * which is more cache-efficient.
1028     * the difference is about 5% with 50000+ watchers.
1029     */
1030 root 1.241 #if EV_USE_4HEAP
1031 root 1.235
1032 root 1.237 #define DHEAP 4
1033     #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1034 root 1.247 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1035 root 1.248 #define UPHEAP_DONE(p,k) ((p) == (k))
1036 root 1.235
1037     /* away from the root */
1038 root 1.284 inline_speed void
1039 root 1.241 downheap (ANHE *heap, int N, int k)
1040 root 1.235 {
1041 root 1.241 ANHE he = heap [k];
1042     ANHE *E = heap + N + HEAP0;
1043 root 1.235
1044     for (;;)
1045     {
1046     ev_tstamp minat;
1047 root 1.241 ANHE *minpos;
1048 root 1.248 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1049 root 1.235
1050 root 1.248 /* find minimum child */
1051 root 1.237 if (expect_true (pos + DHEAP - 1 < E))
1052 root 1.235 {
1053 root 1.245 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1054     if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1055     if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1056     if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1057 root 1.235 }
1058 root 1.240 else if (pos < E)
1059 root 1.235 {
1060 root 1.241 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1061     if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1062     if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1063     if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1064 root 1.235 }
1065 root 1.240 else
1066     break;
1067 root 1.235
1068 root 1.241 if (ANHE_at (he) <= minat)
1069 root 1.235 break;
1070    
1071 root 1.247 heap [k] = *minpos;
1072 root 1.241 ev_active (ANHE_w (*minpos)) = k;
1073 root 1.235
1074     k = minpos - heap;
1075     }
1076    
1077 root 1.247 heap [k] = he;
1078 root 1.241 ev_active (ANHE_w (he)) = k;
1079 root 1.235 }
1080    
1081 root 1.248 #else /* 4HEAP */
1082 root 1.235
1083     #define HEAP0 1
1084 root 1.247 #define HPARENT(k) ((k) >> 1)
1085 root 1.248 #define UPHEAP_DONE(p,k) (!(p))
1086 root 1.235
1087 root 1.248 /* away from the root */
1088 root 1.284 inline_speed void
1089 root 1.248 downheap (ANHE *heap, int N, int k)
1090 root 1.1 {
1091 root 1.241 ANHE he = heap [k];
1092 root 1.1
1093 root 1.228 for (;;)
1094 root 1.1 {
1095 root 1.248 int c = k << 1;
1096 root 1.179
1097 root 1.309 if (c >= N + HEAP0)
1098 root 1.179 break;
1099    
1100 root 1.248 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1101     ? 1 : 0;
1102    
1103     if (ANHE_at (he) <= ANHE_at (heap [c]))
1104     break;
1105    
1106     heap [k] = heap [c];
1107 root 1.241 ev_active (ANHE_w (heap [k])) = k;
1108 root 1.248
1109     k = c;
1110 root 1.1 }
1111    
1112 root 1.243 heap [k] = he;
1113 root 1.248 ev_active (ANHE_w (he)) = k;
1114 root 1.1 }
1115 root 1.248 #endif
1116 root 1.1
1117 root 1.248 /* towards the root */
1118 root 1.284 inline_speed void
1119 root 1.248 upheap (ANHE *heap, int k)
1120 root 1.1 {
1121 root 1.241 ANHE he = heap [k];
1122 root 1.1
1123 root 1.179 for (;;)
1124 root 1.1 {
1125 root 1.248 int p = HPARENT (k);
1126 root 1.179
1127 root 1.248 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1128 root 1.179 break;
1129 root 1.1
1130 root 1.248 heap [k] = heap [p];
1131 root 1.241 ev_active (ANHE_w (heap [k])) = k;
1132 root 1.248 k = p;
1133 root 1.1 }
1134    
1135 root 1.241 heap [k] = he;
1136     ev_active (ANHE_w (he)) = k;
1137 root 1.1 }
1138    
1139 root 1.288 /* move an element suitably so it is in a correct place */
1140 root 1.284 inline_size void
1141 root 1.241 adjustheap (ANHE *heap, int N, int k)
1142 root 1.84 {
1143 root 1.310 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1144 root 1.247 upheap (heap, k);
1145     else
1146     downheap (heap, N, k);
1147 root 1.84 }
1148    
1149 root 1.248 /* rebuild the heap: this function is used only once and executed rarely */
1150 root 1.284 inline_size void
1151 root 1.248 reheap (ANHE *heap, int N)
1152     {
1153     int i;
1154 root 1.251
1155 root 1.248 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1156     /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1157     for (i = 0; i < N; ++i)
1158     upheap (heap, i + HEAP0);
1159     }
1160    
1161 root 1.8 /*****************************************************************************/
1162    
1163 root 1.288 /* associate signal watchers to a signal signal */
1164 root 1.7 typedef struct
1165     {
1166 root 1.307 EV_ATOMIC_T pending;
1167 root 1.306 #if EV_MULTIPLICITY
1168     EV_P;
1169     #endif
1170 root 1.68 WL head;
1171 root 1.7 } ANSIG;
1172    
1173 root 1.306 static ANSIG signals [EV_NSIG - 1];
1174 root 1.7
1175 root 1.207 /*****************************************************************************/
1176    
1177 root 1.288 /* used to prepare libev internal fd's */
1178     /* this is not fork-safe */
1179 root 1.284 inline_speed void
1180 root 1.207 fd_intern (int fd)
1181     {
1182     #ifdef _WIN32
1183 root 1.254 unsigned long arg = 1;
1184 root 1.207 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1185     #else
1186     fcntl (fd, F_SETFD, FD_CLOEXEC);
1187     fcntl (fd, F_SETFL, O_NONBLOCK);
1188     #endif
1189     }
1190    
1191     static void noinline
1192     evpipe_init (EV_P)
1193     {
1194 root 1.288 if (!ev_is_active (&pipe_w))
1195 root 1.207 {
1196 root 1.220 #if EV_USE_EVENTFD
1197 root 1.303 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1198     if (evfd < 0 && errno == EINVAL)
1199     evfd = eventfd (0, 0);
1200    
1201     if (evfd >= 0)
1202 root 1.220 {
1203     evpipe [0] = -1;
1204 root 1.303 fd_intern (evfd); /* doing it twice doesn't hurt */
1205 root 1.288 ev_io_set (&pipe_w, evfd, EV_READ);
1206 root 1.220 }
1207     else
1208     #endif
1209     {
1210     while (pipe (evpipe))
1211 root 1.269 ev_syserr ("(libev) error creating signal/async pipe");
1212 root 1.207
1213 root 1.220 fd_intern (evpipe [0]);
1214     fd_intern (evpipe [1]);
1215 root 1.288 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1216 root 1.220 }
1217 root 1.207
1218 root 1.288 ev_io_start (EV_A_ &pipe_w);
1219 root 1.210 ev_unref (EV_A); /* watcher should not keep loop alive */
1220 root 1.207 }
1221     }
1222    
1223 root 1.284 inline_size void
1224 root 1.214 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1225 root 1.207 {
1226 root 1.214 if (!*flag)
1227 root 1.207 {
1228 ayin 1.215 int old_errno = errno; /* save errno because write might clobber it */
1229 root 1.214
1230     *flag = 1;
1231 root 1.220
1232     #if EV_USE_EVENTFD
1233     if (evfd >= 0)
1234     {
1235     uint64_t counter = 1;
1236     write (evfd, &counter, sizeof (uint64_t));
1237     }
1238     else
1239     #endif
1240     write (evpipe [1], &old_errno, 1);
1241 root 1.214
1242 root 1.207 errno = old_errno;
1243     }
1244     }
1245    
1246 root 1.288 /* called whenever the libev signal pipe */
1247     /* got some events (signal, async) */
1248 root 1.207 static void
1249     pipecb (EV_P_ ev_io *iow, int revents)
1250     {
1251 root 1.307 int i;
1252    
1253 root 1.220 #if EV_USE_EVENTFD
1254     if (evfd >= 0)
1255     {
1256 root 1.232 uint64_t counter;
1257 root 1.220 read (evfd, &counter, sizeof (uint64_t));
1258     }
1259     else
1260     #endif
1261     {
1262     char dummy;
1263     read (evpipe [0], &dummy, 1);
1264     }
1265 root 1.207
1266 root 1.307 if (sig_pending)
1267 root 1.207 {
1268 root 1.307 sig_pending = 0;
1269 root 1.207
1270 root 1.307 for (i = EV_NSIG - 1; i--; )
1271     if (expect_false (signals [i].pending))
1272     ev_feed_signal_event (EV_A_ i + 1);
1273 root 1.207 }
1274    
1275 root 1.209 #if EV_ASYNC_ENABLE
1276 root 1.307 if (async_pending)
1277 root 1.207 {
1278 root 1.307 async_pending = 0;
1279 root 1.207
1280     for (i = asynccnt; i--; )
1281     if (asyncs [i]->sent)
1282     {
1283     asyncs [i]->sent = 0;
1284     ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1285     }
1286     }
1287 root 1.209 #endif
1288 root 1.207 }
1289    
1290     /*****************************************************************************/
1291    
1292 root 1.7 static void
1293 root 1.218 ev_sighandler (int signum)
1294 root 1.7 {
1295 root 1.207 #if EV_MULTIPLICITY
1296 root 1.306 EV_P = signals [signum - 1].loop;
1297 root 1.207 #endif
1298    
1299 root 1.103 #if _WIN32
1300 root 1.218 signal (signum, ev_sighandler);
1301 root 1.67 #endif
1302    
1303 root 1.307 signals [signum - 1].pending = 1;
1304     evpipe_write (EV_A_ &sig_pending);
1305 root 1.7 }
1306    
1307 root 1.140 void noinline
1308 root 1.79 ev_feed_signal_event (EV_P_ int signum)
1309     {
1310 root 1.80 WL w;
1311    
1312 root 1.307 if (expect_false (signum <= 0 || signum > EV_NSIG))
1313     return;
1314    
1315     --signum;
1316    
1317 root 1.79 #if EV_MULTIPLICITY
1318 root 1.307 /* it is permissible to try to feed a signal to the wrong loop */
1319     /* or, likely more useful, feeding a signal nobody is waiting for */
1320 root 1.79
1321 root 1.307 if (expect_false (signals [signum].loop != EV_A))
1322 root 1.306 return;
1323 root 1.307 #endif
1324 root 1.306
1325 root 1.307 signals [signum].pending = 0;
1326 root 1.79
1327     for (w = signals [signum].head; w; w = w->next)
1328     ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1329     }
1330    
1331 root 1.303 #if EV_USE_SIGNALFD
1332     static void
1333     sigfdcb (EV_P_ ev_io *iow, int revents)
1334     {
1335 root 1.306 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1336 root 1.303
1337     for (;;)
1338     {
1339     ssize_t res = read (sigfd, si, sizeof (si));
1340    
1341     /* not ISO-C, as res might be -1, but works with SuS */
1342     for (sip = si; (char *)sip < (char *)si + res; ++sip)
1343     ev_feed_signal_event (EV_A_ sip->ssi_signo);
1344    
1345     if (res < (ssize_t)sizeof (si))
1346     break;
1347     }
1348     }
1349     #endif
1350    
1351 root 1.8 /*****************************************************************************/
1352    
1353 root 1.182 static WL childs [EV_PID_HASHSIZE];
1354 root 1.71
1355 root 1.103 #ifndef _WIN32
1356 root 1.45
1357 root 1.136 static ev_signal childev;
1358 root 1.59
1359 root 1.206 #ifndef WIFCONTINUED
1360     # define WIFCONTINUED(status) 0
1361     #endif
1362    
1363 root 1.288 /* handle a single child status event */
1364 root 1.284 inline_speed void
1365 root 1.216 child_reap (EV_P_ int chain, int pid, int status)
1366 root 1.47 {
1367 root 1.136 ev_child *w;
1368 root 1.206 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1369 root 1.47
1370 root 1.149 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1371 root 1.206 {
1372     if ((w->pid == pid || !w->pid)
1373     && (!traced || (w->flags & 1)))
1374     {
1375 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 */
1376 root 1.206 w->rpid = pid;
1377     w->rstatus = status;
1378     ev_feed_event (EV_A_ (W)w, EV_CHILD);
1379     }
1380     }
1381 root 1.47 }
1382    
1383 root 1.142 #ifndef WCONTINUED
1384     # define WCONTINUED 0
1385     #endif
1386    
1387 root 1.288 /* called on sigchld etc., calls waitpid */
1388 root 1.47 static void
1389 root 1.136 childcb (EV_P_ ev_signal *sw, int revents)
1390 root 1.22 {
1391     int pid, status;
1392    
1393 root 1.142 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1394     if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1395     if (!WCONTINUED
1396     || errno != EINVAL
1397     || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1398     return;
1399    
1400 root 1.216 /* make sure we are called again until all children have been reaped */
1401 root 1.142 /* we need to do it this way so that the callback gets called before we continue */
1402     ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1403 root 1.47
1404 root 1.216 child_reap (EV_A_ pid, pid, status);
1405 root 1.149 if (EV_PID_HASHSIZE > 1)
1406 root 1.216 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1407 root 1.22 }
1408    
1409 root 1.45 #endif
1410    
1411 root 1.22 /*****************************************************************************/
1412    
1413 root 1.118 #if EV_USE_PORT
1414     # include "ev_port.c"
1415     #endif
1416 root 1.44 #if EV_USE_KQUEUE
1417     # include "ev_kqueue.c"
1418     #endif
1419 root 1.29 #if EV_USE_EPOLL
1420 root 1.1 # include "ev_epoll.c"
1421     #endif
1422 root 1.59 #if EV_USE_POLL
1423 root 1.41 # include "ev_poll.c"
1424     #endif
1425 root 1.29 #if EV_USE_SELECT
1426 root 1.1 # include "ev_select.c"
1427     #endif
1428    
1429 root 1.24 int
1430     ev_version_major (void)
1431     {
1432     return EV_VERSION_MAJOR;
1433     }
1434    
1435     int
1436     ev_version_minor (void)
1437     {
1438     return EV_VERSION_MINOR;
1439     }
1440    
1441 root 1.49 /* return true if we are running with elevated privileges and should ignore env variables */
1442 root 1.140 int inline_size
1443 root 1.51 enable_secure (void)
1444 root 1.41 {
1445 root 1.103 #ifdef _WIN32
1446 root 1.49 return 0;
1447     #else
1448 root 1.41 return getuid () != geteuid ()
1449     || getgid () != getegid ();
1450 root 1.49 #endif
1451 root 1.41 }
1452    
1453 root 1.111 unsigned int
1454 root 1.129 ev_supported_backends (void)
1455     {
1456 root 1.130 unsigned int flags = 0;
1457 root 1.129
1458     if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1459     if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1460     if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1461     if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1462     if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1463    
1464     return flags;
1465     }
1466    
1467     unsigned int
1468 root 1.130 ev_recommended_backends (void)
1469 root 1.1 {
1470 root 1.131 unsigned int flags = ev_supported_backends ();
1471 root 1.129
1472     #ifndef __NetBSD__
1473     /* kqueue is borked on everything but netbsd apparently */
1474     /* it usually doesn't work correctly on anything but sockets and pipes */
1475     flags &= ~EVBACKEND_KQUEUE;
1476     #endif
1477     #ifdef __APPLE__
1478 root 1.278 /* only select works correctly on that "unix-certified" platform */
1479     flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1480     flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1481 root 1.129 #endif
1482    
1483     return flags;
1484 root 1.51 }
1485    
1486 root 1.130 unsigned int
1487 root 1.134 ev_embeddable_backends (void)
1488     {
1489 root 1.196 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1490    
1491 root 1.192 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1492 root 1.196 /* please fix it and tell me how to detect the fix */
1493     flags &= ~EVBACKEND_EPOLL;
1494    
1495     return flags;
1496 root 1.134 }
1497    
1498     unsigned int
1499 root 1.130 ev_backend (EV_P)
1500     {
1501     return backend;
1502     }
1503    
1504 root 1.297 #if EV_MINIMAL < 2
1505 root 1.162 unsigned int
1506     ev_loop_count (EV_P)
1507     {
1508     return loop_count;
1509     }
1510    
1511 root 1.294 unsigned int
1512     ev_loop_depth (EV_P)
1513     {
1514     return loop_depth;
1515     }
1516    
1517 root 1.193 void
1518     ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1519     {
1520     io_blocktime = interval;
1521     }
1522    
1523     void
1524     ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1525     {
1526     timeout_blocktime = interval;
1527     }
1528    
1529 root 1.297 void
1530     ev_set_userdata (EV_P_ void *data)
1531     {
1532     userdata = data;
1533     }
1534    
1535     void *
1536     ev_userdata (EV_P)
1537     {
1538     return userdata;
1539     }
1540    
1541     void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1542     {
1543     invoke_cb = invoke_pending_cb;
1544     }
1545    
1546 root 1.298 void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1547 root 1.297 {
1548 root 1.298 release_cb = release;
1549     acquire_cb = acquire;
1550 root 1.297 }
1551     #endif
1552    
1553 root 1.288 /* initialise a loop structure, must be zero-initialised */
1554 root 1.151 static void noinline
1555 root 1.108 loop_init (EV_P_ unsigned int flags)
1556 root 1.51 {
1557 root 1.130 if (!backend)
1558 root 1.23 {
1559 root 1.279 #if EV_USE_REALTIME
1560     if (!have_realtime)
1561     {
1562     struct timespec ts;
1563    
1564     if (!clock_gettime (CLOCK_REALTIME, &ts))
1565     have_realtime = 1;
1566     }
1567     #endif
1568    
1569 root 1.29 #if EV_USE_MONOTONIC
1570 root 1.279 if (!have_monotonic)
1571     {
1572     struct timespec ts;
1573    
1574     if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1575     have_monotonic = 1;
1576     }
1577 root 1.1 #endif
1578    
1579 root 1.306 /* pid check not overridable via env */
1580     #ifndef _WIN32
1581     if (flags & EVFLAG_FORKCHECK)
1582     curpid = getpid ();
1583     #endif
1584    
1585     if (!(flags & EVFLAG_NOENV)
1586     && !enable_secure ()
1587     && getenv ("LIBEV_FLAGS"))
1588     flags = atoi (getenv ("LIBEV_FLAGS"));
1589    
1590 root 1.209 ev_rt_now = ev_time ();
1591     mn_now = get_clock ();
1592     now_floor = mn_now;
1593     rtmn_diff = ev_rt_now - mn_now;
1594 root 1.297 #if EV_MINIMAL < 2
1595 root 1.296 invoke_cb = ev_invoke_pending;
1596 root 1.297 #endif
1597 root 1.1
1598 root 1.193 io_blocktime = 0.;
1599     timeout_blocktime = 0.;
1600 root 1.209 backend = 0;
1601     backend_fd = -1;
1602 root 1.307 sig_pending = 0;
1603     #if EV_ASYNC_ENABLE
1604     async_pending = 0;
1605     #endif
1606 root 1.209 #if EV_USE_INOTIFY
1607 root 1.306 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1608 root 1.209 #endif
1609 root 1.303 #if EV_USE_SIGNALFD
1610 root 1.306 sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2;
1611 root 1.303 #endif
1612 root 1.193
1613 root 1.225 if (!(flags & 0x0000ffffU))
1614 root 1.129 flags |= ev_recommended_backends ();
1615 root 1.41
1616 root 1.118 #if EV_USE_PORT
1617 root 1.130 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1618 root 1.118 #endif
1619 root 1.44 #if EV_USE_KQUEUE
1620 root 1.130 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1621 root 1.44 #endif
1622 root 1.29 #if EV_USE_EPOLL
1623 root 1.130 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1624 root 1.41 #endif
1625 root 1.59 #if EV_USE_POLL
1626 root 1.130 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1627 root 1.1 #endif
1628 root 1.29 #if EV_USE_SELECT
1629 root 1.130 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1630 root 1.1 #endif
1631 root 1.70
1632 root 1.288 ev_prepare_init (&pending_w, pendingcb);
1633    
1634     ev_init (&pipe_w, pipecb);
1635     ev_set_priority (&pipe_w, EV_MAXPRI);
1636 root 1.56 }
1637     }
1638    
1639 root 1.288 /* free up a loop structure */
1640 root 1.151 static void noinline
1641 root 1.56 loop_destroy (EV_P)
1642     {
1643 root 1.65 int i;
1644    
1645 root 1.288 if (ev_is_active (&pipe_w))
1646 root 1.207 {
1647 root 1.303 /*ev_ref (EV_A);*/
1648     /*ev_io_stop (EV_A_ &pipe_w);*/
1649 root 1.207
1650 root 1.220 #if EV_USE_EVENTFD
1651     if (evfd >= 0)
1652     close (evfd);
1653     #endif
1654    
1655     if (evpipe [0] >= 0)
1656     {
1657 root 1.313 EV_WIN32_CLOSE_FD (evpipe [0]);
1658     EV_WIN32_CLOSE_FD (evpipe [1]);
1659 root 1.220 }
1660 root 1.207 }
1661    
1662 root 1.303 #if EV_USE_SIGNALFD
1663     if (ev_is_active (&sigfd_w))
1664     {
1665     /*ev_ref (EV_A);*/
1666     /*ev_io_stop (EV_A_ &sigfd_w);*/
1667    
1668     close (sigfd);
1669     }
1670     #endif
1671    
1672 root 1.152 #if EV_USE_INOTIFY
1673     if (fs_fd >= 0)
1674     close (fs_fd);
1675     #endif
1676    
1677     if (backend_fd >= 0)
1678     close (backend_fd);
1679    
1680 root 1.118 #if EV_USE_PORT
1681 root 1.130 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1682 root 1.118 #endif
1683 root 1.56 #if EV_USE_KQUEUE
1684 root 1.130 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1685 root 1.56 #endif
1686     #if EV_USE_EPOLL
1687 root 1.130 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1688 root 1.56 #endif
1689 root 1.59 #if EV_USE_POLL
1690 root 1.130 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1691 root 1.56 #endif
1692     #if EV_USE_SELECT
1693 root 1.130 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1694 root 1.56 #endif
1695 root 1.1
1696 root 1.65 for (i = NUMPRI; i--; )
1697 root 1.164 {
1698     array_free (pending, [i]);
1699     #if EV_IDLE_ENABLE
1700     array_free (idle, [i]);
1701     #endif
1702     }
1703 root 1.65
1704 root 1.305 ev_free (anfds); anfds = 0; anfdmax = 0;
1705 root 1.186
1706 root 1.71 /* have to use the microsoft-never-gets-it-right macro */
1707 root 1.284 array_free (rfeed, EMPTY);
1708 root 1.164 array_free (fdchange, EMPTY);
1709     array_free (timer, EMPTY);
1710 root 1.140 #if EV_PERIODIC_ENABLE
1711 root 1.164 array_free (periodic, EMPTY);
1712 root 1.93 #endif
1713 root 1.187 #if EV_FORK_ENABLE
1714     array_free (fork, EMPTY);
1715     #endif
1716 root 1.164 array_free (prepare, EMPTY);
1717     array_free (check, EMPTY);
1718 root 1.209 #if EV_ASYNC_ENABLE
1719     array_free (async, EMPTY);
1720     #endif
1721 root 1.65
1722 root 1.130 backend = 0;
1723 root 1.56 }
1724 root 1.22
1725 root 1.226 #if EV_USE_INOTIFY
1726 root 1.284 inline_size void infy_fork (EV_P);
1727 root 1.226 #endif
1728 root 1.154
1729 root 1.284 inline_size void
1730 root 1.56 loop_fork (EV_P)
1731     {
1732 root 1.118 #if EV_USE_PORT
1733 root 1.130 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1734 root 1.56 #endif
1735     #if EV_USE_KQUEUE
1736 root 1.130 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1737 root 1.45 #endif
1738 root 1.118 #if EV_USE_EPOLL
1739 root 1.130 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1740 root 1.118 #endif
1741 root 1.154 #if EV_USE_INOTIFY
1742     infy_fork (EV_A);
1743     #endif
1744 root 1.70
1745 root 1.288 if (ev_is_active (&pipe_w))
1746 root 1.70 {
1747 root 1.207 /* this "locks" the handlers against writing to the pipe */
1748 root 1.212 /* while we modify the fd vars */
1749 root 1.307 sig_pending = 1;
1750 root 1.212 #if EV_ASYNC_ENABLE
1751 root 1.307 async_pending = 1;
1752 root 1.212 #endif
1753 root 1.70
1754     ev_ref (EV_A);
1755 root 1.288 ev_io_stop (EV_A_ &pipe_w);
1756 root 1.220
1757     #if EV_USE_EVENTFD
1758     if (evfd >= 0)
1759     close (evfd);
1760     #endif
1761    
1762     if (evpipe [0] >= 0)
1763     {
1764 root 1.313 EV_WIN32_CLOSE_FD (evpipe [0]);
1765     EV_WIN32_CLOSE_FD (evpipe [1]);
1766 root 1.220 }
1767 root 1.207
1768     evpipe_init (EV_A);
1769 root 1.208 /* now iterate over everything, in case we missed something */
1770 root 1.288 pipecb (EV_A_ &pipe_w, EV_READ);
1771 root 1.70 }
1772    
1773     postfork = 0;
1774 root 1.1 }
1775    
1776 root 1.55 #if EV_MULTIPLICITY
1777 root 1.250
1778 root 1.54 struct ev_loop *
1779 root 1.108 ev_loop_new (unsigned int flags)
1780 root 1.54 {
1781 root 1.306 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1782 root 1.69
1783 root 1.306 memset (EV_A, 0, sizeof (struct ev_loop));
1784 root 1.108 loop_init (EV_A_ flags);
1785 root 1.56
1786 root 1.130 if (ev_backend (EV_A))
1787 root 1.306 return EV_A;
1788 root 1.54
1789 root 1.55 return 0;
1790 root 1.54 }
1791    
1792     void
1793 root 1.56 ev_loop_destroy (EV_P)
1794 root 1.54 {
1795 root 1.56 loop_destroy (EV_A);
1796 root 1.69 ev_free (loop);
1797 root 1.54 }
1798    
1799 root 1.56 void
1800     ev_loop_fork (EV_P)
1801     {
1802 root 1.205 postfork = 1; /* must be in line with ev_default_fork */
1803 root 1.56 }
1804 root 1.297 #endif /* multiplicity */
1805 root 1.248
1806     #if EV_VERIFY
1807 root 1.258 static void noinline
1808 root 1.251 verify_watcher (EV_P_ W w)
1809     {
1810 root 1.278 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1811 root 1.251
1812     if (w->pending)
1813 root 1.278 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1814 root 1.251 }
1815    
1816     static void noinline
1817     verify_heap (EV_P_ ANHE *heap, int N)
1818     {
1819     int i;
1820    
1821     for (i = HEAP0; i < N + HEAP0; ++i)
1822     {
1823 root 1.278 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1824     assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1825     assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1826 root 1.251
1827     verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1828     }
1829     }
1830    
1831     static void noinline
1832     array_verify (EV_P_ W *ws, int cnt)
1833 root 1.248 {
1834     while (cnt--)
1835 root 1.251 {
1836 root 1.278 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1837 root 1.251 verify_watcher (EV_A_ ws [cnt]);
1838     }
1839 root 1.248 }
1840 root 1.250 #endif
1841 root 1.248
1842 root 1.297 #if EV_MINIMAL < 2
1843 root 1.250 void
1844 root 1.248 ev_loop_verify (EV_P)
1845     {
1846 root 1.250 #if EV_VERIFY
1847 root 1.248 int i;
1848 root 1.251 WL w;
1849    
1850     assert (activecnt >= -1);
1851    
1852     assert (fdchangemax >= fdchangecnt);
1853     for (i = 0; i < fdchangecnt; ++i)
1854 root 1.278 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1855 root 1.251
1856     assert (anfdmax >= 0);
1857     for (i = 0; i < anfdmax; ++i)
1858     for (w = anfds [i].head; w; w = w->next)
1859     {
1860     verify_watcher (EV_A_ (W)w);
1861 root 1.278 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1862     assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1863 root 1.251 }
1864    
1865     assert (timermax >= timercnt);
1866     verify_heap (EV_A_ timers, timercnt);
1867 root 1.248
1868     #if EV_PERIODIC_ENABLE
1869 root 1.251 assert (periodicmax >= periodiccnt);
1870     verify_heap (EV_A_ periodics, periodiccnt);
1871 root 1.248 #endif
1872    
1873 root 1.251 for (i = NUMPRI; i--; )
1874     {
1875     assert (pendingmax [i] >= pendingcnt [i]);
1876 root 1.248 #if EV_IDLE_ENABLE
1877 root 1.252 assert (idleall >= 0);
1878 root 1.251 assert (idlemax [i] >= idlecnt [i]);
1879     array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1880 root 1.248 #endif
1881 root 1.251 }
1882    
1883 root 1.248 #if EV_FORK_ENABLE
1884 root 1.251 assert (forkmax >= forkcnt);
1885     array_verify (EV_A_ (W *)forks, forkcnt);
1886 root 1.248 #endif
1887 root 1.251
1888 root 1.250 #if EV_ASYNC_ENABLE
1889 root 1.251 assert (asyncmax >= asynccnt);
1890     array_verify (EV_A_ (W *)asyncs, asynccnt);
1891 root 1.250 #endif
1892 root 1.251
1893     assert (preparemax >= preparecnt);
1894     array_verify (EV_A_ (W *)prepares, preparecnt);
1895    
1896     assert (checkmax >= checkcnt);
1897     array_verify (EV_A_ (W *)checks, checkcnt);
1898    
1899     # if 0
1900     for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1901 root 1.307 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1902 root 1.251 # endif
1903 root 1.248 #endif
1904     }
1905 root 1.297 #endif
1906 root 1.56
1907     #if EV_MULTIPLICITY
1908     struct ev_loop *
1909 root 1.125 ev_default_loop_init (unsigned int flags)
1910 root 1.54 #else
1911     int
1912 root 1.116 ev_default_loop (unsigned int flags)
1913 root 1.56 #endif
1914 root 1.54 {
1915 root 1.116 if (!ev_default_loop_ptr)
1916 root 1.56 {
1917     #if EV_MULTIPLICITY
1918 root 1.306 EV_P = ev_default_loop_ptr = &default_loop_struct;
1919 root 1.56 #else
1920 ayin 1.117 ev_default_loop_ptr = 1;
1921 root 1.54 #endif
1922    
1923 root 1.110 loop_init (EV_A_ flags);
1924 root 1.56
1925 root 1.130 if (ev_backend (EV_A))
1926 root 1.56 {
1927 root 1.103 #ifndef _WIN32
1928 root 1.56 ev_signal_init (&childev, childcb, SIGCHLD);
1929     ev_set_priority (&childev, EV_MAXPRI);
1930     ev_signal_start (EV_A_ &childev);
1931     ev_unref (EV_A); /* child watcher should not keep loop alive */
1932     #endif
1933     }
1934     else
1935 root 1.116 ev_default_loop_ptr = 0;
1936 root 1.56 }
1937 root 1.8
1938 root 1.116 return ev_default_loop_ptr;
1939 root 1.1 }
1940    
1941 root 1.24 void
1942 root 1.56 ev_default_destroy (void)
1943 root 1.1 {
1944 root 1.57 #if EV_MULTIPLICITY
1945 root 1.306 EV_P = ev_default_loop_ptr;
1946 root 1.57 #endif
1947 root 1.56
1948 root 1.266 ev_default_loop_ptr = 0;
1949    
1950 root 1.103 #ifndef _WIN32
1951 root 1.56 ev_ref (EV_A); /* child watcher */
1952     ev_signal_stop (EV_A_ &childev);
1953 root 1.71 #endif
1954 root 1.56
1955     loop_destroy (EV_A);
1956 root 1.1 }
1957    
1958 root 1.24 void
1959 root 1.60 ev_default_fork (void)
1960 root 1.1 {
1961 root 1.60 #if EV_MULTIPLICITY
1962 root 1.306 EV_P = ev_default_loop_ptr;
1963 root 1.60 #endif
1964    
1965 root 1.270 postfork = 1; /* must be in line with ev_loop_fork */
1966 root 1.1 }
1967    
1968 root 1.8 /*****************************************************************************/
1969    
1970 root 1.168 void
1971     ev_invoke (EV_P_ void *w, int revents)
1972     {
1973     EV_CB_INVOKE ((W)w, revents);
1974     }
1975    
1976 root 1.300 unsigned int
1977     ev_pending_count (EV_P)
1978     {
1979     int pri;
1980     unsigned int count = 0;
1981    
1982     for (pri = NUMPRI; pri--; )
1983     count += pendingcnt [pri];
1984    
1985     return count;
1986     }
1987    
1988 root 1.297 void noinline
1989 root 1.296 ev_invoke_pending (EV_P)
1990 root 1.1 {
1991 root 1.42 int pri;
1992    
1993     for (pri = NUMPRI; pri--; )
1994     while (pendingcnt [pri])
1995     {
1996     ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1997 root 1.1
1998 root 1.288 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1999     /* ^ this is no longer true, as pending_w could be here */
2000 root 1.139
2001 root 1.288 p->w->pending = 0;
2002     EV_CB_INVOKE (p->w, p->events);
2003     EV_FREQUENT_CHECK;
2004 root 1.42 }
2005 root 1.1 }
2006    
2007 root 1.234 #if EV_IDLE_ENABLE
2008 root 1.288 /* make idle watchers pending. this handles the "call-idle */
2009     /* only when higher priorities are idle" logic */
2010 root 1.284 inline_size void
2011 root 1.234 idle_reify (EV_P)
2012     {
2013     if (expect_false (idleall))
2014     {
2015     int pri;
2016    
2017     for (pri = NUMPRI; pri--; )
2018     {
2019     if (pendingcnt [pri])
2020     break;
2021    
2022     if (idlecnt [pri])
2023     {
2024     queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2025     break;
2026     }
2027     }
2028     }
2029     }
2030     #endif
2031    
2032 root 1.288 /* make timers pending */
2033 root 1.284 inline_size void
2034 root 1.51 timers_reify (EV_P)
2035 root 1.1 {
2036 root 1.248 EV_FREQUENT_CHECK;
2037    
2038 root 1.284 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2039 root 1.1 {
2040 root 1.284 do
2041     {
2042     ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2043 root 1.1
2044 root 1.284 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2045    
2046     /* first reschedule or stop timer */
2047     if (w->repeat)
2048     {
2049     ev_at (w) += w->repeat;
2050     if (ev_at (w) < mn_now)
2051     ev_at (w) = mn_now;
2052 root 1.61
2053 root 1.284 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2054 root 1.90
2055 root 1.284 ANHE_at_cache (timers [HEAP0]);
2056     downheap (timers, timercnt, HEAP0);
2057     }
2058     else
2059     ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2060 root 1.243
2061 root 1.284 EV_FREQUENT_CHECK;
2062     feed_reverse (EV_A_ (W)w);
2063 root 1.12 }
2064 root 1.284 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2065 root 1.30
2066 root 1.284 feed_reverse_done (EV_A_ EV_TIMEOUT);
2067 root 1.12 }
2068     }
2069 root 1.4
2070 root 1.140 #if EV_PERIODIC_ENABLE
2071 root 1.288 /* make periodics pending */
2072 root 1.284 inline_size void
2073 root 1.51 periodics_reify (EV_P)
2074 root 1.12 {
2075 root 1.248 EV_FREQUENT_CHECK;
2076 root 1.250
2077 root 1.244 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2078 root 1.12 {
2079 root 1.284 int feed_count = 0;
2080    
2081     do
2082     {
2083     ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2084 root 1.1
2085 root 1.284 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2086 root 1.61
2087 root 1.284 /* first reschedule or stop timer */
2088     if (w->reschedule_cb)
2089     {
2090     ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2091 root 1.243
2092 root 1.284 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2093 root 1.243
2094 root 1.284 ANHE_at_cache (periodics [HEAP0]);
2095     downheap (periodics, periodiccnt, HEAP0);
2096     }
2097     else if (w->interval)
2098 root 1.246 {
2099 root 1.284 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2100     /* if next trigger time is not sufficiently in the future, put it there */
2101     /* this might happen because of floating point inexactness */
2102     if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2103     {
2104     ev_at (w) += w->interval;
2105    
2106     /* if interval is unreasonably low we might still have a time in the past */
2107     /* so correct this. this will make the periodic very inexact, but the user */
2108     /* has effectively asked to get triggered more often than possible */
2109     if (ev_at (w) < ev_rt_now)
2110     ev_at (w) = ev_rt_now;
2111     }
2112 root 1.243
2113 root 1.284 ANHE_at_cache (periodics [HEAP0]);
2114     downheap (periodics, periodiccnt, HEAP0);
2115 root 1.246 }
2116 root 1.284 else
2117     ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2118 root 1.243
2119 root 1.284 EV_FREQUENT_CHECK;
2120     feed_reverse (EV_A_ (W)w);
2121 root 1.1 }
2122 root 1.284 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2123 root 1.12
2124 root 1.284 feed_reverse_done (EV_A_ EV_PERIODIC);
2125 root 1.12 }
2126     }
2127    
2128 root 1.288 /* simply recalculate all periodics */
2129     /* TODO: maybe ensure that at leats one event happens when jumping forward? */
2130 root 1.140 static void noinline
2131 root 1.54 periodics_reschedule (EV_P)
2132 root 1.12 {
2133     int i;
2134    
2135 root 1.13 /* adjust periodics after time jump */
2136 root 1.241 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2137 root 1.12 {
2138 root 1.241 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2139 root 1.12
2140 root 1.77 if (w->reschedule_cb)
2141 root 1.228 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2142 root 1.77 else if (w->interval)
2143 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2144 root 1.242
2145 root 1.248 ANHE_at_cache (periodics [i]);
2146 root 1.77 }
2147 root 1.12
2148 root 1.248 reheap (periodics, periodiccnt);
2149 root 1.1 }
2150 root 1.93 #endif
2151 root 1.1
2152 root 1.288 /* adjust all timers by a given offset */
2153 root 1.285 static void noinline
2154     timers_reschedule (EV_P_ ev_tstamp adjust)
2155     {
2156     int i;
2157    
2158     for (i = 0; i < timercnt; ++i)
2159     {
2160     ANHE *he = timers + i + HEAP0;
2161     ANHE_w (*he)->at += adjust;
2162     ANHE_at_cache (*he);
2163     }
2164     }
2165    
2166 root 1.288 /* fetch new monotonic and realtime times from the kernel */
2167     /* also detetc if there was a timejump, and act accordingly */
2168 root 1.284 inline_speed void
2169 root 1.178 time_update (EV_P_ ev_tstamp max_block)
2170 root 1.4 {
2171 root 1.40 #if EV_USE_MONOTONIC
2172     if (expect_true (have_monotonic))
2173     {
2174 root 1.289 int i;
2175 root 1.178 ev_tstamp odiff = rtmn_diff;
2176    
2177     mn_now = get_clock ();
2178    
2179     /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2180     /* interpolate in the meantime */
2181     if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2182 root 1.40 {
2183 root 1.178 ev_rt_now = rtmn_diff + mn_now;
2184     return;
2185     }
2186    
2187     now_floor = mn_now;
2188     ev_rt_now = ev_time ();
2189 root 1.4
2190 root 1.178 /* loop a few times, before making important decisions.
2191     * on the choice of "4": one iteration isn't enough,
2192     * in case we get preempted during the calls to
2193     * ev_time and get_clock. a second call is almost guaranteed
2194     * to succeed in that case, though. and looping a few more times
2195     * doesn't hurt either as we only do this on time-jumps or
2196     * in the unlikely event of having been preempted here.
2197     */
2198     for (i = 4; --i; )
2199     {
2200     rtmn_diff = ev_rt_now - mn_now;
2201 root 1.4
2202 root 1.234 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2203 root 1.178 return; /* all is well */
2204 root 1.4
2205 root 1.178 ev_rt_now = ev_time ();
2206     mn_now = get_clock ();
2207     now_floor = mn_now;
2208     }
2209 root 1.4
2210 root 1.285 /* no timer adjustment, as the monotonic clock doesn't jump */
2211     /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2212 root 1.140 # if EV_PERIODIC_ENABLE
2213 root 1.178 periodics_reschedule (EV_A);
2214 root 1.93 # endif
2215 root 1.4 }
2216     else
2217 root 1.40 #endif
2218 root 1.4 {
2219 root 1.85 ev_rt_now = ev_time ();
2220 root 1.40
2221 root 1.178 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2222 root 1.13 {
2223 root 1.285 /* adjust timers. this is easy, as the offset is the same for all of them */
2224     timers_reschedule (EV_A_ ev_rt_now - mn_now);
2225 root 1.140 #if EV_PERIODIC_ENABLE
2226 root 1.54 periodics_reschedule (EV_A);
2227 root 1.93 #endif
2228 root 1.13 }
2229 root 1.4
2230 root 1.85 mn_now = ev_rt_now;
2231 root 1.4 }
2232     }
2233    
2234 root 1.51 void
2235     ev_loop (EV_P_ int flags)
2236 root 1.1 {
2237 root 1.297 #if EV_MINIMAL < 2
2238 root 1.294 ++loop_depth;
2239 root 1.297 #endif
2240 root 1.294
2241 root 1.298 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2242    
2243 root 1.219 loop_done = EVUNLOOP_CANCEL;
2244 root 1.1
2245 root 1.297 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2246 root 1.158
2247 root 1.161 do
2248 root 1.9 {
2249 root 1.250 #if EV_VERIFY >= 2
2250     ev_loop_verify (EV_A);
2251     #endif
2252    
2253 root 1.158 #ifndef _WIN32
2254     if (expect_false (curpid)) /* penalise the forking check even more */
2255     if (expect_false (getpid () != curpid))
2256     {
2257     curpid = getpid ();
2258     postfork = 1;
2259     }
2260     #endif
2261    
2262 root 1.157 #if EV_FORK_ENABLE
2263     /* we might have forked, so queue fork handlers */
2264     if (expect_false (postfork))
2265     if (forkcnt)
2266     {
2267     queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2268 root 1.297 EV_INVOKE_PENDING;
2269 root 1.157 }
2270     #endif
2271 root 1.147
2272 root 1.170 /* queue prepare watchers (and execute them) */
2273 root 1.40 if (expect_false (preparecnt))
2274 root 1.20 {
2275 root 1.51 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2276 root 1.297 EV_INVOKE_PENDING;
2277 root 1.20 }
2278 root 1.9
2279 root 1.298 if (expect_false (loop_done))
2280     break;
2281    
2282 root 1.70 /* we might have forked, so reify kernel state if necessary */
2283     if (expect_false (postfork))
2284     loop_fork (EV_A);
2285    
2286 root 1.1 /* update fd-related kernel structures */
2287 root 1.51 fd_reify (EV_A);
2288 root 1.1
2289     /* calculate blocking time */
2290 root 1.135 {
2291 root 1.193 ev_tstamp waittime = 0.;
2292     ev_tstamp sleeptime = 0.;
2293 root 1.12
2294 root 1.193 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2295 root 1.135 {
2296 root 1.293 /* remember old timestamp for io_blocktime calculation */
2297     ev_tstamp prev_mn_now = mn_now;
2298    
2299 root 1.135 /* update time to cancel out callback processing overhead */
2300 root 1.178 time_update (EV_A_ 1e100);
2301 root 1.135
2302 root 1.287 waittime = MAX_BLOCKTIME;
2303    
2304 root 1.135 if (timercnt)
2305     {
2306 root 1.241 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2307 root 1.193 if (waittime > to) waittime = to;
2308 root 1.135 }
2309 root 1.4
2310 root 1.140 #if EV_PERIODIC_ENABLE
2311 root 1.135 if (periodiccnt)
2312     {
2313 root 1.241 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2314 root 1.193 if (waittime > to) waittime = to;
2315 root 1.135 }
2316 root 1.93 #endif
2317 root 1.4
2318 root 1.293 /* don't let timeouts decrease the waittime below timeout_blocktime */
2319 root 1.193 if (expect_false (waittime < timeout_blocktime))
2320     waittime = timeout_blocktime;
2321    
2322 root 1.293 /* extra check because io_blocktime is commonly 0 */
2323     if (expect_false (io_blocktime))
2324     {
2325     sleeptime = io_blocktime - (mn_now - prev_mn_now);
2326 root 1.193
2327 root 1.293 if (sleeptime > waittime - backend_fudge)
2328     sleeptime = waittime - backend_fudge;
2329 root 1.193
2330 root 1.293 if (expect_true (sleeptime > 0.))
2331     {
2332     ev_sleep (sleeptime);
2333     waittime -= sleeptime;
2334     }
2335 root 1.193 }
2336 root 1.135 }
2337 root 1.1
2338 root 1.297 #if EV_MINIMAL < 2
2339 root 1.162 ++loop_count;
2340 root 1.297 #endif
2341 root 1.298 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2342 root 1.193 backend_poll (EV_A_ waittime);
2343 root 1.298 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2344 root 1.178
2345     /* update ev_rt_now, do magic */
2346 root 1.193 time_update (EV_A_ waittime + sleeptime);
2347 root 1.135 }
2348 root 1.1
2349 root 1.9 /* queue pending timers and reschedule them */
2350 root 1.51 timers_reify (EV_A); /* relative timers called last */
2351 root 1.140 #if EV_PERIODIC_ENABLE
2352 root 1.51 periodics_reify (EV_A); /* absolute timers called first */
2353 root 1.93 #endif
2354 root 1.1
2355 root 1.164 #if EV_IDLE_ENABLE
2356 root 1.137 /* queue idle watchers unless other events are pending */
2357 root 1.164 idle_reify (EV_A);
2358     #endif
2359 root 1.9
2360 root 1.20 /* queue check watchers, to be executed first */
2361 root 1.123 if (expect_false (checkcnt))
2362 root 1.51 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2363 root 1.9
2364 root 1.297 EV_INVOKE_PENDING;
2365 root 1.1 }
2366 root 1.219 while (expect_true (
2367     activecnt
2368     && !loop_done
2369     && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2370     ));
2371 root 1.13
2372 root 1.135 if (loop_done == EVUNLOOP_ONE)
2373     loop_done = EVUNLOOP_CANCEL;
2374 root 1.294
2375 root 1.297 #if EV_MINIMAL < 2
2376 root 1.294 --loop_depth;
2377 root 1.297 #endif
2378 root 1.51 }
2379    
2380     void
2381     ev_unloop (EV_P_ int how)
2382     {
2383     loop_done = how;
2384 root 1.1 }
2385    
2386 root 1.285 void
2387     ev_ref (EV_P)
2388     {
2389     ++activecnt;
2390     }
2391    
2392     void
2393     ev_unref (EV_P)
2394     {
2395     --activecnt;
2396     }
2397    
2398     void
2399     ev_now_update (EV_P)
2400     {
2401     time_update (EV_A_ 1e100);
2402     }
2403    
2404     void
2405     ev_suspend (EV_P)
2406     {
2407     ev_now_update (EV_A);
2408     }
2409    
2410     void
2411     ev_resume (EV_P)
2412     {
2413     ev_tstamp mn_prev = mn_now;
2414    
2415     ev_now_update (EV_A);
2416     timers_reschedule (EV_A_ mn_now - mn_prev);
2417 root 1.286 #if EV_PERIODIC_ENABLE
2418 root 1.288 /* TODO: really do this? */
2419 root 1.285 periodics_reschedule (EV_A);
2420 root 1.286 #endif
2421 root 1.285 }
2422    
2423 root 1.8 /*****************************************************************************/
2424 root 1.288 /* singly-linked list management, used when the expected list length is short */
2425 root 1.8
2426 root 1.284 inline_size void
2427 root 1.10 wlist_add (WL *head, WL elem)
2428 root 1.1 {
2429     elem->next = *head;
2430     *head = elem;
2431     }
2432    
2433 root 1.284 inline_size void
2434 root 1.10 wlist_del (WL *head, WL elem)
2435 root 1.1 {
2436     while (*head)
2437     {
2438 root 1.307 if (expect_true (*head == elem))
2439 root 1.1 {
2440     *head = elem->next;
2441 root 1.307 break;
2442 root 1.1 }
2443    
2444     head = &(*head)->next;
2445     }
2446     }
2447    
2448 root 1.288 /* internal, faster, version of ev_clear_pending */
2449 root 1.284 inline_speed void
2450 root 1.166 clear_pending (EV_P_ W w)
2451 root 1.16 {
2452     if (w->pending)
2453     {
2454 root 1.288 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2455 root 1.16 w->pending = 0;
2456     }
2457     }
2458    
2459 root 1.167 int
2460     ev_clear_pending (EV_P_ void *w)
2461 root 1.166 {
2462     W w_ = (W)w;
2463     int pending = w_->pending;
2464    
2465 root 1.172 if (expect_true (pending))
2466     {
2467     ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2468 root 1.288 p->w = (W)&pending_w;
2469 root 1.172 w_->pending = 0;
2470     return p->events;
2471     }
2472     else
2473 root 1.167 return 0;
2474 root 1.166 }
2475    
2476 root 1.284 inline_size void
2477 root 1.164 pri_adjust (EV_P_ W w)
2478     {
2479 root 1.295 int pri = ev_priority (w);
2480 root 1.164 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2481     pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2482 root 1.295 ev_set_priority (w, pri);
2483 root 1.164 }
2484    
2485 root 1.284 inline_speed void
2486 root 1.51 ev_start (EV_P_ W w, int active)
2487 root 1.1 {
2488 root 1.164 pri_adjust (EV_A_ w);
2489 root 1.1 w->active = active;
2490 root 1.51 ev_ref (EV_A);
2491 root 1.1 }
2492    
2493 root 1.284 inline_size void
2494 root 1.51 ev_stop (EV_P_ W w)
2495 root 1.1 {
2496 root 1.51 ev_unref (EV_A);
2497 root 1.1 w->active = 0;
2498     }
2499    
2500 root 1.8 /*****************************************************************************/
2501    
2502 root 1.171 void noinline
2503 root 1.136 ev_io_start (EV_P_ ev_io *w)
2504 root 1.1 {
2505 root 1.37 int fd = w->fd;
2506    
2507 root 1.123 if (expect_false (ev_is_active (w)))
2508 root 1.1 return;
2509    
2510 root 1.278 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2511 root 1.281 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2512 root 1.33
2513 root 1.248 EV_FREQUENT_CHECK;
2514    
2515 root 1.51 ev_start (EV_A_ (W)w, 1);
2516 root 1.265 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2517 root 1.182 wlist_add (&anfds[fd].head, (WL)w);
2518 root 1.1
2519 root 1.298 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2520 root 1.281 w->events &= ~EV__IOFDSET;
2521 root 1.248
2522     EV_FREQUENT_CHECK;
2523 root 1.1 }
2524    
2525 root 1.171 void noinline
2526 root 1.136 ev_io_stop (EV_P_ ev_io *w)
2527 root 1.1 {
2528 root 1.166 clear_pending (EV_A_ (W)w);
2529 root 1.123 if (expect_false (!ev_is_active (w)))
2530 root 1.1 return;
2531    
2532 root 1.278 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2533 root 1.89
2534 root 1.248 EV_FREQUENT_CHECK;
2535    
2536 root 1.182 wlist_del (&anfds[w->fd].head, (WL)w);
2537 root 1.51 ev_stop (EV_A_ (W)w);
2538 root 1.1
2539 root 1.184 fd_change (EV_A_ w->fd, 1);
2540 root 1.248
2541     EV_FREQUENT_CHECK;
2542 root 1.1 }
2543    
2544 root 1.171 void noinline
2545 root 1.136 ev_timer_start (EV_P_ ev_timer *w)
2546 root 1.1 {
2547 root 1.123 if (expect_false (ev_is_active (w)))
2548 root 1.1 return;
2549    
2550 root 1.228 ev_at (w) += mn_now;
2551 root 1.12
2552 root 1.278 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2553 root 1.13
2554 root 1.248 EV_FREQUENT_CHECK;
2555    
2556     ++timercnt;
2557     ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2558 root 1.241 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2559     ANHE_w (timers [ev_active (w)]) = (WT)w;
2560 root 1.248 ANHE_at_cache (timers [ev_active (w)]);
2561 root 1.235 upheap (timers, ev_active (w));
2562 root 1.62
2563 root 1.248 EV_FREQUENT_CHECK;
2564    
2565 root 1.278 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2566 root 1.12 }
2567    
2568 root 1.171 void noinline
2569 root 1.136 ev_timer_stop (EV_P_ ev_timer *w)
2570 root 1.12 {
2571 root 1.166 clear_pending (EV_A_ (W)w);
2572 root 1.123 if (expect_false (!ev_is_active (w)))
2573 root 1.12 return;
2574    
2575 root 1.248 EV_FREQUENT_CHECK;
2576    
2577 root 1.230 {
2578     int active = ev_active (w);
2579 root 1.62
2580 root 1.278 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2581 root 1.151
2582 root 1.248 --timercnt;
2583    
2584     if (expect_true (active < timercnt + HEAP0))
2585 root 1.151 {
2586 root 1.248 timers [active] = timers [timercnt + HEAP0];
2587 root 1.181 adjustheap (timers, timercnt, active);
2588 root 1.151 }
2589 root 1.248 }
2590 root 1.228
2591 root 1.248 EV_FREQUENT_CHECK;
2592 root 1.4
2593 root 1.228 ev_at (w) -= mn_now;
2594 root 1.14
2595 root 1.51 ev_stop (EV_A_ (W)w);
2596 root 1.12 }
2597 root 1.4
2598 root 1.171 void noinline
2599 root 1.136 ev_timer_again (EV_P_ ev_timer *w)
2600 root 1.14 {
2601 root 1.248 EV_FREQUENT_CHECK;
2602    
2603 root 1.14 if (ev_is_active (w))
2604     {
2605     if (w->repeat)
2606 root 1.99 {
2607 root 1.228 ev_at (w) = mn_now + w->repeat;
2608 root 1.248 ANHE_at_cache (timers [ev_active (w)]);
2609 root 1.230 adjustheap (timers, timercnt, ev_active (w));
2610 root 1.99 }
2611 root 1.14 else
2612 root 1.51 ev_timer_stop (EV_A_ w);
2613 root 1.14 }
2614     else if (w->repeat)
2615 root 1.112 {
2616 root 1.229 ev_at (w) = w->repeat;
2617 root 1.112 ev_timer_start (EV_A_ w);
2618     }
2619 root 1.248
2620     EV_FREQUENT_CHECK;
2621 root 1.14 }
2622    
2623 root 1.301 ev_tstamp
2624     ev_timer_remaining (EV_P_ ev_timer *w)
2625     {
2626     return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2627     }
2628    
2629 root 1.140 #if EV_PERIODIC_ENABLE
2630 root 1.171 void noinline
2631 root 1.136 ev_periodic_start (EV_P_ ev_periodic *w)
2632 root 1.12 {
2633 root 1.123 if (expect_false (ev_is_active (w)))
2634 root 1.12 return;
2635 root 1.1
2636 root 1.77 if (w->reschedule_cb)
2637 root 1.228 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2638 root 1.77 else if (w->interval)
2639     {
2640 root 1.278 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2641 root 1.77 /* this formula differs from the one in periodic_reify because we do not always round up */
2642 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2643 root 1.77 }
2644 root 1.173 else
2645 root 1.228 ev_at (w) = w->offset;
2646 root 1.12
2647 root 1.248 EV_FREQUENT_CHECK;
2648    
2649     ++periodiccnt;
2650     ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2651 root 1.241 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2652     ANHE_w (periodics [ev_active (w)]) = (WT)w;
2653 root 1.248 ANHE_at_cache (periodics [ev_active (w)]);
2654 root 1.235 upheap (periodics, ev_active (w));
2655 root 1.62
2656 root 1.248 EV_FREQUENT_CHECK;
2657    
2658 root 1.278 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2659 root 1.1 }
2660    
2661 root 1.171 void noinline
2662 root 1.136 ev_periodic_stop (EV_P_ ev_periodic *w)
2663 root 1.1 {
2664 root 1.166 clear_pending (EV_A_ (W)w);
2665 root 1.123 if (expect_false (!ev_is_active (w)))
2666 root 1.1 return;
2667    
2668 root 1.248 EV_FREQUENT_CHECK;
2669    
2670 root 1.230 {
2671     int active = ev_active (w);
2672 root 1.62
2673 root 1.278 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2674 root 1.151
2675 root 1.248 --periodiccnt;
2676    
2677     if (expect_true (active < periodiccnt + HEAP0))
2678 root 1.151 {
2679 root 1.248 periodics [active] = periodics [periodiccnt + HEAP0];
2680 root 1.181 adjustheap (periodics, periodiccnt, active);
2681 root 1.151 }
2682 root 1.248 }
2683 root 1.228
2684 root 1.248 EV_FREQUENT_CHECK;
2685 root 1.2
2686 root 1.51 ev_stop (EV_A_ (W)w);
2687 root 1.1 }
2688    
2689 root 1.171 void noinline
2690 root 1.136 ev_periodic_again (EV_P_ ev_periodic *w)
2691 root 1.77 {
2692 root 1.84 /* TODO: use adjustheap and recalculation */
2693 root 1.77 ev_periodic_stop (EV_A_ w);
2694     ev_periodic_start (EV_A_ w);
2695     }
2696 root 1.93 #endif
2697 root 1.77
2698 root 1.56 #ifndef SA_RESTART
2699     # define SA_RESTART 0
2700     #endif
2701    
2702 root 1.171 void noinline
2703 root 1.136 ev_signal_start (EV_P_ ev_signal *w)
2704 root 1.56 {
2705 root 1.123 if (expect_false (ev_is_active (w)))
2706 root 1.56 return;
2707    
2708 root 1.306 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2709    
2710     #if EV_MULTIPLICITY
2711 root 1.308 assert (("libev: a signal must not be attached to two different loops",
2712 root 1.306 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2713    
2714     signals [w->signum - 1].loop = EV_A;
2715     #endif
2716 root 1.56
2717 root 1.303 EV_FREQUENT_CHECK;
2718    
2719     #if EV_USE_SIGNALFD
2720     if (sigfd == -2)
2721     {
2722     sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2723     if (sigfd < 0 && errno == EINVAL)
2724     sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2725    
2726     if (sigfd >= 0)
2727     {
2728     fd_intern (sigfd); /* doing it twice will not hurt */
2729    
2730     sigemptyset (&sigfd_set);
2731    
2732     ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2733     ev_set_priority (&sigfd_w, EV_MAXPRI);
2734     ev_io_start (EV_A_ &sigfd_w);
2735     ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2736     }
2737     }
2738    
2739     if (sigfd >= 0)
2740     {
2741     /* TODO: check .head */
2742     sigaddset (&sigfd_set, w->signum);
2743     sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2744 root 1.207
2745 root 1.303 signalfd (sigfd, &sigfd_set, 0);
2746     }
2747 root 1.180 #endif
2748    
2749 root 1.56 ev_start (EV_A_ (W)w, 1);
2750 root 1.182 wlist_add (&signals [w->signum - 1].head, (WL)w);
2751 root 1.56
2752 root 1.63 if (!((WL)w)->next)
2753 root 1.304 # if EV_USE_SIGNALFD
2754 root 1.306 if (sigfd < 0) /*TODO*/
2755 root 1.304 # endif
2756 root 1.306 {
2757     # if _WIN32
2758     signal (w->signum, ev_sighandler);
2759     # else
2760     struct sigaction sa;
2761    
2762     evpipe_init (EV_A);
2763    
2764     sa.sa_handler = ev_sighandler;
2765     sigfillset (&sa.sa_mask);
2766     sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2767     sigaction (w->signum, &sa, 0);
2768    
2769     sigemptyset (&sa.sa_mask);
2770     sigaddset (&sa.sa_mask, w->signum);
2771     sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2772 root 1.67 #endif
2773 root 1.306 }
2774 root 1.248
2775     EV_FREQUENT_CHECK;
2776 root 1.56 }
2777    
2778 root 1.171 void noinline
2779 root 1.136 ev_signal_stop (EV_P_ ev_signal *w)
2780 root 1.56 {
2781 root 1.166 clear_pending (EV_A_ (W)w);
2782 root 1.123 if (expect_false (!ev_is_active (w)))
2783 root 1.56 return;
2784    
2785 root 1.248 EV_FREQUENT_CHECK;
2786    
2787 root 1.182 wlist_del (&signals [w->signum - 1].head, (WL)w);
2788 root 1.56 ev_stop (EV_A_ (W)w);
2789    
2790     if (!signals [w->signum - 1].head)
2791 root 1.306 {
2792 root 1.307 #if EV_MULTIPLICITY
2793 root 1.306 signals [w->signum - 1].loop = 0; /* unattach from signal */
2794 root 1.307 #endif
2795     #if EV_USE_SIGNALFD
2796 root 1.306 if (sigfd >= 0)
2797     {
2798     sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2799     sigdelset (&sigfd_set, w->signum);
2800     signalfd (sigfd, &sigfd_set, 0);
2801     sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2802     /*TODO: maybe unblock signal? */
2803     }
2804     else
2805 root 1.307 #endif
2806 root 1.306 signal (w->signum, SIG_DFL);
2807     }
2808 root 1.248
2809     EV_FREQUENT_CHECK;
2810 root 1.56 }
2811    
2812 root 1.28 void
2813 root 1.136 ev_child_start (EV_P_ ev_child *w)
2814 root 1.22 {
2815 root 1.56 #if EV_MULTIPLICITY
2816 root 1.278 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2817 root 1.56 #endif
2818 root 1.123 if (expect_false (ev_is_active (w)))
2819 root 1.22 return;
2820    
2821 root 1.248 EV_FREQUENT_CHECK;
2822    
2823 root 1.51 ev_start (EV_A_ (W)w, 1);
2824 root 1.182 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2825 root 1.248
2826     EV_FREQUENT_CHECK;
2827 root 1.22 }
2828    
2829 root 1.28 void
2830 root 1.136 ev_child_stop (EV_P_ ev_child *w)
2831 root 1.22 {
2832 root 1.166 clear_pending (EV_A_ (W)w);
2833 root 1.123 if (expect_false (!ev_is_active (w)))
2834 root 1.22 return;
2835    
2836 root 1.248 EV_FREQUENT_CHECK;
2837    
2838 root 1.182 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2839 root 1.51 ev_stop (EV_A_ (W)w);
2840 root 1.248
2841     EV_FREQUENT_CHECK;
2842 root 1.22 }
2843    
2844 root 1.140 #if EV_STAT_ENABLE
2845    
2846     # ifdef _WIN32
2847 root 1.146 # undef lstat
2848     # define lstat(a,b) _stati64 (a,b)
2849 root 1.140 # endif
2850    
2851 root 1.273 #define DEF_STAT_INTERVAL 5.0074891
2852     #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2853     #define MIN_STAT_INTERVAL 0.1074891
2854 root 1.143
2855 root 1.157 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2856 root 1.152
2857     #if EV_USE_INOTIFY
2858 root 1.153 # define EV_INOTIFY_BUFSIZE 8192
2859 root 1.152
2860     static void noinline
2861     infy_add (EV_P_ ev_stat *w)
2862     {
2863     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);
2864    
2865     if (w->wd < 0)
2866     {
2867 root 1.273 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2868     ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2869 root 1.152
2870     /* monitor some parent directory for speedup hints */
2871 root 1.271 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2872 root 1.233 /* but an efficiency issue only */
2873 root 1.153 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2874 root 1.152 {
2875 root 1.153 char path [4096];
2876 root 1.152 strcpy (path, w->path);
2877    
2878     do
2879     {
2880     int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2881     | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2882    
2883     char *pend = strrchr (path, '/');
2884    
2885 root 1.275 if (!pend || pend == path)
2886     break;
2887 root 1.152
2888     *pend = 0;
2889 root 1.153 w->wd = inotify_add_watch (fs_fd, path, mask);
2890 root 1.152 }
2891     while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2892     }
2893     }
2894 root 1.275
2895     if (w->wd >= 0)
2896 root 1.273 {
2897 root 1.312 struct statfs sfs;
2898    
2899 root 1.273 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2900    
2901     /* now local changes will be tracked by inotify, but remote changes won't */
2902     /* unless the filesystem it known to be local, we therefore still poll */
2903     /* also do poll on <2.6.25, but with normal frequency */
2904    
2905     if (fs_2625 && !statfs (w->path, &sfs))
2906     if (sfs.f_type == 0x1373 /* devfs */
2907     || sfs.f_type == 0xEF53 /* ext2/3 */
2908     || sfs.f_type == 0x3153464a /* jfs */
2909     || sfs.f_type == 0x52654973 /* reiser3 */
2910     || sfs.f_type == 0x01021994 /* tempfs */
2911     || sfs.f_type == 0x58465342 /* xfs */)
2912     return;
2913 root 1.152
2914 root 1.273 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2915     ev_timer_again (EV_A_ &w->timer);
2916     }
2917 root 1.152 }
2918    
2919     static void noinline
2920     infy_del (EV_P_ ev_stat *w)
2921     {
2922     int slot;
2923     int wd = w->wd;
2924    
2925     if (wd < 0)
2926     return;
2927    
2928     w->wd = -2;
2929     slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2930     wlist_del (&fs_hash [slot].head, (WL)w);
2931    
2932     /* remove this watcher, if others are watching it, they will rearm */
2933     inotify_rm_watch (fs_fd, wd);
2934     }
2935    
2936     static void noinline
2937     infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2938     {
2939     if (slot < 0)
2940 root 1.264 /* overflow, need to check for all hash slots */
2941 root 1.152 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2942     infy_wd (EV_A_ slot, wd, ev);
2943     else
2944     {
2945     WL w_;
2946    
2947     for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2948     {
2949     ev_stat *w = (ev_stat *)w_;
2950     w_ = w_->next; /* lets us remove this watcher and all before it */
2951    
2952     if (w->wd == wd || wd == -1)
2953     {
2954     if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2955     {
2956 root 1.275 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2957 root 1.152 w->wd = -1;
2958     infy_add (EV_A_ w); /* re-add, no matter what */
2959     }
2960    
2961 root 1.153 stat_timer_cb (EV_A_ &w->timer, 0);
2962 root 1.152 }
2963     }
2964     }
2965     }
2966    
2967     static void
2968     infy_cb (EV_P_ ev_io *w, int revents)
2969     {
2970     char buf [EV_INOTIFY_BUFSIZE];
2971     struct inotify_event *ev = (struct inotify_event *)buf;
2972     int ofs;
2973     int len = read (fs_fd, buf, sizeof (buf));
2974    
2975     for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2976     infy_wd (EV_A_ ev->wd, ev->wd, ev);
2977     }
2978    
2979 root 1.284 inline_size void
2980 root 1.273 check_2625 (EV_P)
2981 root 1.152 {
2982 root 1.264 /* kernels < 2.6.25 are borked
2983     * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2984     */
2985 root 1.273 struct utsname buf;
2986     int major, minor, micro;
2987    
2988     if (uname (&buf))
2989     return;
2990    
2991     if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2992     return;
2993    
2994     if (major < 2
2995     || (major == 2 && minor < 6)
2996     || (major == 2 && minor == 6 && micro < 25))
2997     return;
2998 root 1.264
2999 root 1.273 fs_2625 = 1;
3000     }
3001 root 1.264
3002 root 1.284 inline_size void
3003 root 1.273 infy_init (EV_P)
3004     {
3005     if (fs_fd != -2)
3006     return;
3007 root 1.264
3008 root 1.273 fs_fd = -1;
3009 root 1.264
3010 root 1.273 check_2625 (EV_A);
3011 root 1.264
3012 root 1.152 fs_fd = inotify_init ();
3013    
3014     if (fs_fd >= 0)
3015     {
3016     ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3017     ev_set_priority (&fs_w, EV_MAXPRI);
3018     ev_io_start (EV_A_ &fs_w);
3019     }
3020     }
3021    
3022 root 1.284 inline_size void
3023 root 1.154 infy_fork (EV_P)
3024     {
3025     int slot;
3026    
3027     if (fs_fd < 0)
3028     return;
3029    
3030     close (fs_fd);
3031     fs_fd = inotify_init ();
3032    
3033     for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3034     {
3035     WL w_ = fs_hash [slot].head;
3036     fs_hash [slot].head = 0;
3037    
3038     while (w_)
3039     {
3040     ev_stat *w = (ev_stat *)w_;
3041     w_ = w_->next; /* lets us add this watcher */
3042    
3043     w->wd = -1;
3044    
3045     if (fs_fd >= 0)
3046     infy_add (EV_A_ w); /* re-add, no matter what */
3047     else
3048 root 1.273 ev_timer_again (EV_A_ &w->timer);
3049 root 1.154 }
3050     }
3051     }
3052    
3053 root 1.152 #endif
3054    
3055 root 1.255 #ifdef _WIN32
3056     # define EV_LSTAT(p,b) _stati64 (p, b)
3057     #else
3058     # define EV_LSTAT(p,b) lstat (p, b)
3059     #endif
3060    
3061 root 1.140 void
3062     ev_stat_stat (EV_P_ ev_stat *w)
3063     {
3064     if (lstat (w->path, &w->attr) < 0)
3065     w->attr.st_nlink = 0;
3066     else if (!w->attr.st_nlink)
3067     w->attr.st_nlink = 1;
3068     }
3069    
3070 root 1.157 static void noinline
3071 root 1.140 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3072     {
3073     ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3074    
3075     /* we copy this here each the time so that */
3076     /* prev has the old value when the callback gets invoked */
3077     w->prev = w->attr;
3078     ev_stat_stat (EV_A_ w);
3079    
3080 root 1.156 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3081     if (
3082     w->prev.st_dev != w->attr.st_dev
3083     || w->prev.st_ino != w->attr.st_ino
3084     || w->prev.st_mode != w->attr.st_mode
3085     || w->prev.st_nlink != w->attr.st_nlink
3086     || w->prev.st_uid != w->attr.st_uid
3087     || w->prev.st_gid != w->attr.st_gid
3088     || w->prev.st_rdev != w->attr.st_rdev
3089     || w->prev.st_size != w->attr.st_size
3090     || w->prev.st_atime != w->attr.st_atime
3091     || w->prev.st_mtime != w->attr.st_mtime
3092     || w->prev.st_ctime != w->attr.st_ctime
3093     ) {
3094 root 1.152 #if EV_USE_INOTIFY
3095 root 1.264 if (fs_fd >= 0)
3096     {
3097     infy_del (EV_A_ w);
3098     infy_add (EV_A_ w);
3099     ev_stat_stat (EV_A_ w); /* avoid race... */
3100     }
3101 root 1.152 #endif
3102    
3103     ev_feed_event (EV_A_ w, EV_STAT);
3104     }
3105 root 1.140 }
3106    
3107     void
3108     ev_stat_start (EV_P_ ev_stat *w)
3109     {
3110     if (expect_false (ev_is_active (w)))
3111     return;
3112    
3113     ev_stat_stat (EV_A_ w);
3114    
3115 root 1.273 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3116     w->interval = MIN_STAT_INTERVAL;
3117 root 1.143
3118 root 1.273 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3119 root 1.140 ev_set_priority (&w->timer, ev_priority (w));
3120 root 1.152
3121     #if EV_USE_INOTIFY
3122     infy_init (EV_A);
3123    
3124     if (fs_fd >= 0)
3125     infy_add (EV_A_ w);
3126     else
3127     #endif
3128 root 1.273 ev_timer_again (EV_A_ &w->timer);
3129 root 1.140
3130     ev_start (EV_A_ (W)w, 1);
3131 root 1.248
3132     EV_FREQUENT_CHECK;
3133 root 1.140 }
3134    
3135     void
3136     ev_stat_stop (EV_P_ ev_stat *w)
3137     {
3138 root 1.166 clear_pending (EV_A_ (W)w);
3139 root 1.140 if (expect_false (!ev_is_active (w)))
3140     return;
3141    
3142 root 1.248 EV_FREQUENT_CHECK;
3143    
3144 root 1.152 #if EV_USE_INOTIFY
3145     infy_del (EV_A_ w);
3146     #endif
3147 root 1.140 ev_timer_stop (EV_A_ &w->timer);
3148    
3149 root 1.134 ev_stop (EV_A_ (W)w);
3150 root 1.248
3151     EV_FREQUENT_CHECK;
3152 root 1.134 }
3153     #endif
3154    
3155 root 1.164 #if EV_IDLE_ENABLE
3156 root 1.144 void
3157     ev_idle_start (EV_P_ ev_idle *w)
3158     {
3159     if (expect_false (ev_is_active (w)))
3160     return;
3161    
3162 root 1.164 pri_adjust (EV_A_ (W)w);
3163    
3164 root 1.248 EV_FREQUENT_CHECK;
3165    
3166 root 1.164 {
3167     int active = ++idlecnt [ABSPRI (w)];
3168    
3169     ++idleall;
3170     ev_start (EV_A_ (W)w, active);
3171    
3172     array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3173     idles [ABSPRI (w)][active - 1] = w;
3174     }
3175 root 1.248
3176     EV_FREQUENT_CHECK;
3177 root 1.144 }
3178    
3179     void
3180     ev_idle_stop (EV_P_ ev_idle *w)
3181     {
3182 root 1.166 clear_pending (EV_A_ (W)w);
3183 root 1.144 if (expect_false (!ev_is_active (w)))
3184     return;
3185    
3186 root 1.248 EV_FREQUENT_CHECK;
3187    
3188 root 1.144 {
3189 root 1.230 int active = ev_active (w);
3190 root 1.164
3191     idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3192 root 1.230 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3193 root 1.164
3194     ev_stop (EV_A_ (W)w);
3195     --idleall;
3196 root 1.144 }
3197 root 1.248
3198     EV_FREQUENT_CHECK;
3199 root 1.144 }
3200 root 1.164 #endif
3201 root 1.144
3202     void
3203     ev_prepare_start (EV_P_ ev_prepare *w)
3204     {
3205     if (expect_false (ev_is_active (w)))
3206     return;
3207    
3208 root 1.248 EV_FREQUENT_CHECK;
3209    
3210 root 1.144 ev_start (EV_A_ (W)w, ++preparecnt);
3211     array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3212     prepares [preparecnt - 1] = w;
3213 root 1.248
3214     EV_FREQUENT_CHECK;
3215 root 1.144 }
3216    
3217     void
3218     ev_prepare_stop (EV_P_ ev_prepare *w)
3219     {
3220 root 1.166 clear_pending (EV_A_ (W)w);
3221 root 1.144 if (expect_false (!ev_is_active (w)))
3222     return;
3223    
3224 root 1.248 EV_FREQUENT_CHECK;
3225    
3226 root 1.144 {
3227 root 1.230 int active = ev_active (w);
3228    
3229 root 1.144 prepares [active - 1] = prepares [--preparecnt];
3230 root 1.230 ev_active (prepares [active - 1]) = active;
3231 root 1.144 }
3232    
3233     ev_stop (EV_A_ (W)w);
3234 root 1.248
3235     EV_FREQUENT_CHECK;
3236 root 1.144 }
3237    
3238     void
3239     ev_check_start (EV_P_ ev_check *w)
3240     {
3241     if (expect_false (ev_is_active (w)))
3242     return;
3243    
3244 root 1.248 EV_FREQUENT_CHECK;
3245    
3246 root 1.144 ev_start (EV_A_ (W)w, ++checkcnt);
3247     array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3248     checks [checkcnt - 1] = w;
3249 root 1.248
3250     EV_FREQUENT_CHECK;
3251 root 1.144 }
3252    
3253     void
3254     ev_check_stop (EV_P_ ev_check *w)
3255     {
3256 root 1.166 clear_pending (EV_A_ (W)w);
3257 root 1.144 if (expect_false (!ev_is_active (w)))
3258     return;
3259    
3260 root 1.248 EV_FREQUENT_CHECK;
3261    
3262 root 1.144 {
3263 root 1.230 int active = ev_active (w);
3264    
3265 root 1.144 checks [active - 1] = checks [--checkcnt];
3266 root 1.230 ev_active (checks [active - 1]) = active;
3267 root 1.144 }
3268    
3269     ev_stop (EV_A_ (W)w);
3270 root 1.248
3271     EV_FREQUENT_CHECK;
3272 root 1.144 }
3273    
3274     #if EV_EMBED_ENABLE
3275     void noinline
3276     ev_embed_sweep (EV_P_ ev_embed *w)
3277     {
3278 root 1.188 ev_loop (w->other, EVLOOP_NONBLOCK);
3279 root 1.144 }
3280    
3281     static void
3282 root 1.189 embed_io_cb (EV_P_ ev_io *io, int revents)
3283 root 1.144 {
3284     ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3285    
3286     if (ev_cb (w))
3287     ev_feed_event (EV_A_ (W)w, EV_EMBED);
3288     else
3289 root 1.195 ev_loop (w->other, EVLOOP_NONBLOCK);
3290 root 1.144 }
3291    
3292 root 1.189 static void
3293     embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3294     {
3295     ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3296    
3297 root 1.195 {
3298 root 1.306 EV_P = w->other;
3299 root 1.195
3300     while (fdchangecnt)
3301     {
3302     fd_reify (EV_A);
3303     ev_loop (EV_A_ EVLOOP_NONBLOCK);
3304     }
3305     }
3306     }
3307    
3308 root 1.261 static void
3309     embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3310     {
3311     ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3312    
3313 root 1.277 ev_embed_stop (EV_A_ w);
3314    
3315 root 1.261 {
3316 root 1.306 EV_P = w->other;
3317 root 1.261
3318     ev_loop_fork (EV_A);
3319 root 1.277 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3320 root 1.261 }
3321 root 1.277
3322     ev_embed_start (EV_A_ w);
3323 root 1.261 }
3324    
3325 root 1.195 #if 0
3326     static void
3327     embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3328     {
3329     ev_idle_stop (EV_A_ idle);
3330 root 1.189 }
3331 root 1.195 #endif
3332 root 1.189
3333 root 1.144 void
3334     ev_embed_start (EV_P_ ev_embed *w)
3335     {
3336     if (expect_false (ev_is_active (w)))
3337     return;
3338    
3339     {
3340 root 1.306 EV_P = w->other;
3341 root 1.278 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3342 root 1.191 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3343 root 1.144 }
3344    
3345 root 1.248 EV_FREQUENT_CHECK;
3346    
3347 root 1.144 ev_set_priority (&w->io, ev_priority (w));
3348     ev_io_start (EV_A_ &w->io);
3349    
3350 root 1.189 ev_prepare_init (&w->prepare, embed_prepare_cb);
3351     ev_set_priority (&w->prepare, EV_MINPRI);
3352     ev_prepare_start (EV_A_ &w->prepare);
3353    
3354 root 1.261 ev_fork_init (&w->fork, embed_fork_cb);
3355     ev_fork_start (EV_A_ &w->fork);
3356    
3357 root 1.195 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3358    
3359 root 1.144 ev_start (EV_A_ (W)w, 1);
3360 root 1.248
3361     EV_FREQUENT_CHECK;
3362 root 1.144 }
3363    
3364     void
3365     ev_embed_stop (EV_P_ ev_embed *w)
3366     {
3367 root 1.166 clear_pending (EV_A_ (W)w);
3368 root 1.144 if (expect_false (!ev_is_active (w)))
3369     return;
3370    
3371 root 1.248 EV_FREQUENT_CHECK;
3372    
3373 root 1.261 ev_io_stop (EV_A_ &w->io);
3374 root 1.189 ev_prepare_stop (EV_A_ &w->prepare);
3375 root 1.261 ev_fork_stop (EV_A_ &w->fork);
3376 root 1.248
3377     EV_FREQUENT_CHECK;
3378 root 1.144 }
3379     #endif
3380    
3381 root 1.147 #if EV_FORK_ENABLE
3382     void
3383     ev_fork_start (EV_P_ ev_fork *w)
3384     {
3385     if (expect_false (ev_is_active (w)))
3386     return;
3387    
3388 root 1.248 EV_FREQUENT_CHECK;
3389    
3390 root 1.147 ev_start (EV_A_ (W)w, ++forkcnt);
3391     array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3392     forks [forkcnt - 1] = w;
3393 root 1.248
3394     EV_FREQUENT_CHECK;
3395 root 1.147 }
3396    
3397     void
3398     ev_fork_stop (EV_P_ ev_fork *w)
3399     {
3400 root 1.166 clear_pending (EV_A_ (W)w);
3401 root 1.147 if (expect_false (!ev_is_active (w)))
3402     return;
3403    
3404 root 1.248 EV_FREQUENT_CHECK;
3405    
3406 root 1.147 {
3407 root 1.230 int active = ev_active (w);
3408    
3409 root 1.147 forks [active - 1] = forks [--forkcnt];
3410 root 1.230 ev_active (forks [active - 1]) = active;
3411 root 1.147 }
3412    
3413     ev_stop (EV_A_ (W)w);
3414 root 1.248
3415     EV_FREQUENT_CHECK;
3416 root 1.147 }
3417     #endif
3418    
3419 root 1.207 #if EV_ASYNC_ENABLE
3420     void
3421     ev_async_start (EV_P_ ev_async *w)
3422     {
3423     if (expect_false (ev_is_active (w)))
3424     return;
3425    
3426     evpipe_init (EV_A);
3427    
3428 root 1.248 EV_FREQUENT_CHECK;
3429    
3430 root 1.207 ev_start (EV_A_ (W)w, ++asynccnt);
3431     array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3432     asyncs [asynccnt - 1] = w;
3433 root 1.248
3434     EV_FREQUENT_CHECK;
3435 root 1.207 }
3436    
3437     void
3438     ev_async_stop (EV_P_ ev_async *w)
3439     {
3440     clear_pending (EV_A_ (W)w);
3441     if (expect_false (!ev_is_active (w)))
3442     return;
3443    
3444 root 1.248 EV_FREQUENT_CHECK;
3445    
3446 root 1.207 {
3447 root 1.230 int active = ev_active (w);
3448    
3449 root 1.207 asyncs [active - 1] = asyncs [--asynccnt];
3450 root 1.230 ev_active (asyncs [active - 1]) = active;
3451 root 1.207 }
3452    
3453     ev_stop (EV_A_ (W)w);
3454 root 1.248
3455     EV_FREQUENT_CHECK;
3456 root 1.207 }
3457    
3458     void
3459     ev_async_send (EV_P_ ev_async *w)
3460     {
3461     w->sent = 1;
3462 root 1.307 evpipe_write (EV_A_ &async_pending);
3463 root 1.207 }
3464     #endif
3465    
3466 root 1.1 /*****************************************************************************/
3467 root 1.10
3468 root 1.16 struct ev_once
3469     {
3470 root 1.136 ev_io io;
3471     ev_timer to;
3472 root 1.16 void (*cb)(int revents, void *arg);
3473     void *arg;
3474     };
3475    
3476     static void
3477 root 1.51 once_cb (EV_P_ struct ev_once *once, int revents)
3478 root 1.16 {
3479     void (*cb)(int revents, void *arg) = once->cb;
3480     void *arg = once->arg;
3481    
3482 root 1.259 ev_io_stop (EV_A_ &once->io);
3483 root 1.51 ev_timer_stop (EV_A_ &once->to);
3484 root 1.69 ev_free (once);
3485 root 1.16
3486     cb (revents, arg);
3487     }
3488    
3489     static void
3490 root 1.136 once_cb_io (EV_P_ ev_io *w, int revents)
3491 root 1.16 {
3492 root 1.262 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3493    
3494     once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3495 root 1.16 }
3496    
3497     static void
3498 root 1.136 once_cb_to (EV_P_ ev_timer *w, int revents)
3499 root 1.16 {
3500 root 1.262 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3501    
3502     once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3503 root 1.16 }
3504    
3505     void
3506 root 1.51 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3507 root 1.16 {
3508 root 1.74 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3509 root 1.16
3510 root 1.123 if (expect_false (!once))
3511 root 1.16 {
3512 root 1.123 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3513     return;
3514     }
3515    
3516     once->cb = cb;
3517     once->arg = arg;
3518 root 1.16
3519 root 1.123 ev_init (&once->io, once_cb_io);
3520     if (fd >= 0)
3521     {
3522     ev_io_set (&once->io, fd, events);
3523     ev_io_start (EV_A_ &once->io);
3524     }
3525 root 1.16
3526 root 1.123 ev_init (&once->to, once_cb_to);
3527     if (timeout >= 0.)
3528     {
3529     ev_timer_set (&once->to, timeout, 0.);
3530     ev_timer_start (EV_A_ &once->to);
3531 root 1.16 }
3532     }
3533    
3534 root 1.282 /*****************************************************************************/
3535    
3536 root 1.288 #if EV_WALK_ENABLE
3537 root 1.282 void
3538     ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3539     {
3540     int i, j;
3541     ev_watcher_list *wl, *wn;
3542    
3543     if (types & (EV_IO | EV_EMBED))
3544     for (i = 0; i < anfdmax; ++i)
3545     for (wl = anfds [i].head; wl; )
3546     {
3547     wn = wl->next;
3548    
3549     #if EV_EMBED_ENABLE
3550     if (ev_cb ((ev_io *)wl) == embed_io_cb)
3551     {
3552     if (types & EV_EMBED)
3553     cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3554     }
3555     else
3556     #endif
3557     #if EV_USE_INOTIFY
3558     if (ev_cb ((ev_io *)wl) == infy_cb)
3559     ;
3560     else
3561     #endif
3562 root 1.288 if ((ev_io *)wl != &pipe_w)
3563 root 1.282 if (types & EV_IO)
3564     cb (EV_A_ EV_IO, wl);
3565    
3566     wl = wn;
3567     }
3568    
3569     if (types & (EV_TIMER | EV_STAT))
3570     for (i = timercnt + HEAP0; i-- > HEAP0; )
3571     #if EV_STAT_ENABLE
3572     /*TODO: timer is not always active*/
3573     if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3574     {
3575     if (types & EV_STAT)
3576     cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3577     }
3578     else
3579     #endif
3580     if (types & EV_TIMER)
3581     cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3582    
3583     #if EV_PERIODIC_ENABLE
3584     if (types & EV_PERIODIC)
3585     for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3586     cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3587     #endif
3588    
3589     #if EV_IDLE_ENABLE
3590     if (types & EV_IDLE)
3591     for (j = NUMPRI; i--; )
3592     for (i = idlecnt [j]; i--; )
3593     cb (EV_A_ EV_IDLE, idles [j][i]);
3594     #endif
3595    
3596     #if EV_FORK_ENABLE
3597     if (types & EV_FORK)
3598     for (i = forkcnt; i--; )
3599     if (ev_cb (forks [i]) != embed_fork_cb)
3600     cb (EV_A_ EV_FORK, forks [i]);
3601     #endif
3602    
3603     #if EV_ASYNC_ENABLE
3604     if (types & EV_ASYNC)
3605     for (i = asynccnt; i--; )
3606     cb (EV_A_ EV_ASYNC, asyncs [i]);
3607     #endif
3608    
3609     if (types & EV_PREPARE)
3610     for (i = preparecnt; i--; )
3611     #if EV_EMBED_ENABLE
3612     if (ev_cb (prepares [i]) != embed_prepare_cb)
3613     #endif
3614     cb (EV_A_ EV_PREPARE, prepares [i]);
3615    
3616     if (types & EV_CHECK)
3617     for (i = checkcnt; i--; )
3618     cb (EV_A_ EV_CHECK, checks [i]);
3619    
3620     if (types & EV_SIGNAL)
3621 root 1.306 for (i = 0; i < EV_NSIG - 1; ++i)
3622 root 1.282 for (wl = signals [i].head; wl; )
3623     {
3624     wn = wl->next;
3625     cb (EV_A_ EV_SIGNAL, wl);
3626     wl = wn;
3627     }
3628    
3629     if (types & EV_CHILD)
3630     for (i = EV_PID_HASHSIZE; i--; )
3631     for (wl = childs [i]; wl; )
3632     {
3633     wn = wl->next;
3634     cb (EV_A_ EV_CHILD, wl);
3635     wl = wn;
3636     }
3637     /* EV_STAT 0x00001000 /* stat data changed */
3638     /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3639     }
3640     #endif
3641    
3642 root 1.188 #if EV_MULTIPLICITY
3643     #include "ev_wrap.h"
3644     #endif
3645    
3646 root 1.87 #ifdef __cplusplus
3647     }
3648     #endif
3649