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Revision: 1.311
Committed: Wed Jul 29 09:36:05 2009 UTC (14 years, 9 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: rel-3_8
Changes since 1.310: +5 -1 lines
Log Message:
*** empty log message ***

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     # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9))
308     # 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     # include <sys/signalfd.h>
408     #endif
409    
410 root 1.40 /**/
411 root 1.1
412 root 1.250 #if EV_VERIFY >= 3
413 root 1.248 # define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
414     #else
415     # define EV_FREQUENT_CHECK do { } while (0)
416     #endif
417    
418 root 1.176 /*
419     * This is used to avoid floating point rounding problems.
420     * It is added to ev_rt_now when scheduling periodics
421     * to ensure progress, time-wise, even when rounding
422     * errors are against us.
423 root 1.177 * This value is good at least till the year 4000.
424 root 1.176 * Better solutions welcome.
425     */
426     #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
427    
428 root 1.4 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
429 root 1.120 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
430 root 1.176 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
431 root 1.1
432 root 1.185 #if __GNUC__ >= 4
433 root 1.40 # define expect(expr,value) __builtin_expect ((expr),(value))
434 root 1.169 # define noinline __attribute__ ((noinline))
435 root 1.40 #else
436     # define expect(expr,value) (expr)
437 root 1.140 # define noinline
438 root 1.223 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
439 root 1.169 # define inline
440     # endif
441 root 1.40 #endif
442    
443     #define expect_false(expr) expect ((expr) != 0, 0)
444     #define expect_true(expr) expect ((expr) != 0, 1)
445 root 1.169 #define inline_size static inline
446    
447     #if EV_MINIMAL
448     # define inline_speed static noinline
449     #else
450     # define inline_speed static inline
451     #endif
452 root 1.40
453 root 1.295 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
454    
455     #if EV_MINPRI == EV_MAXPRI
456     # define ABSPRI(w) (((W)w), 0)
457     #else
458     # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
459     #endif
460 root 1.42
461 root 1.164 #define EMPTY /* required for microsofts broken pseudo-c compiler */
462 root 1.114 #define EMPTY2(a,b) /* used to suppress some warnings */
463 root 1.103
464 root 1.136 typedef ev_watcher *W;
465     typedef ev_watcher_list *WL;
466     typedef ev_watcher_time *WT;
467 root 1.10
468 root 1.229 #define ev_active(w) ((W)(w))->active
469 root 1.228 #define ev_at(w) ((WT)(w))->at
470    
471 root 1.279 #if EV_USE_REALTIME
472 root 1.194 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
473     /* giving it a reasonably high chance of working on typical architetcures */
474 root 1.279 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
475     #endif
476    
477     #if EV_USE_MONOTONIC
478 root 1.207 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
479 root 1.198 #endif
480 root 1.54
481 root 1.103 #ifdef _WIN32
482 root 1.98 # include "ev_win32.c"
483     #endif
484 root 1.67
485 root 1.53 /*****************************************************************************/
486 root 1.1
487 root 1.70 static void (*syserr_cb)(const char *msg);
488 root 1.69
489 root 1.141 void
490     ev_set_syserr_cb (void (*cb)(const char *msg))
491 root 1.69 {
492     syserr_cb = cb;
493     }
494    
495 root 1.141 static void noinline
496 root 1.269 ev_syserr (const char *msg)
497 root 1.69 {
498 root 1.70 if (!msg)
499     msg = "(libev) system error";
500    
501 root 1.69 if (syserr_cb)
502 root 1.70 syserr_cb (msg);
503 root 1.69 else
504     {
505 root 1.70 perror (msg);
506 root 1.69 abort ();
507     }
508     }
509    
510 root 1.224 static void *
511     ev_realloc_emul (void *ptr, long size)
512     {
513     /* some systems, notably openbsd and darwin, fail to properly
514     * implement realloc (x, 0) (as required by both ansi c-98 and
515     * the single unix specification, so work around them here.
516     */
517    
518     if (size)
519     return realloc (ptr, size);
520    
521     free (ptr);
522     return 0;
523     }
524    
525     static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
526 root 1.69
527 root 1.141 void
528 root 1.155 ev_set_allocator (void *(*cb)(void *ptr, long size))
529 root 1.69 {
530     alloc = cb;
531     }
532    
533 root 1.150 inline_speed void *
534 root 1.155 ev_realloc (void *ptr, long size)
535 root 1.69 {
536 root 1.224 ptr = alloc (ptr, size);
537 root 1.69
538     if (!ptr && size)
539     {
540 root 1.155 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
541 root 1.69 abort ();
542     }
543    
544     return ptr;
545     }
546    
547     #define ev_malloc(size) ev_realloc (0, (size))
548     #define ev_free(ptr) ev_realloc ((ptr), 0)
549    
550     /*****************************************************************************/
551    
552 root 1.298 /* set in reify when reification needed */
553     #define EV_ANFD_REIFY 1
554    
555 root 1.288 /* file descriptor info structure */
556 root 1.53 typedef struct
557     {
558 root 1.68 WL head;
559 root 1.288 unsigned char events; /* the events watched for */
560 root 1.298 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
561 root 1.288 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
562 root 1.269 unsigned char unused;
563     #if EV_USE_EPOLL
564 root 1.288 unsigned int egen; /* generation counter to counter epoll bugs */
565 root 1.269 #endif
566 root 1.103 #if EV_SELECT_IS_WINSOCKET
567     SOCKET handle;
568     #endif
569 root 1.53 } ANFD;
570 root 1.1
571 root 1.288 /* stores the pending event set for a given watcher */
572 root 1.53 typedef struct
573     {
574     W w;
575 root 1.288 int events; /* the pending event set for the given watcher */
576 root 1.53 } ANPENDING;
577 root 1.51
578 root 1.155 #if EV_USE_INOTIFY
579 root 1.241 /* hash table entry per inotify-id */
580 root 1.152 typedef struct
581     {
582     WL head;
583 root 1.155 } ANFS;
584 root 1.152 #endif
585    
586 root 1.241 /* Heap Entry */
587     #if EV_HEAP_CACHE_AT
588 root 1.288 /* a heap element */
589 root 1.241 typedef struct {
590 root 1.243 ev_tstamp at;
591 root 1.241 WT w;
592     } ANHE;
593    
594 root 1.248 #define ANHE_w(he) (he).w /* access watcher, read-write */
595     #define ANHE_at(he) (he).at /* access cached at, read-only */
596     #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
597 root 1.241 #else
598 root 1.288 /* a heap element */
599 root 1.241 typedef WT ANHE;
600    
601 root 1.248 #define ANHE_w(he) (he)
602     #define ANHE_at(he) (he)->at
603     #define ANHE_at_cache(he)
604 root 1.241 #endif
605    
606 root 1.55 #if EV_MULTIPLICITY
607 root 1.54
608 root 1.80 struct ev_loop
609     {
610 root 1.86 ev_tstamp ev_rt_now;
611 root 1.99 #define ev_rt_now ((loop)->ev_rt_now)
612 root 1.80 #define VAR(name,decl) decl;
613     #include "ev_vars.h"
614     #undef VAR
615     };
616     #include "ev_wrap.h"
617    
618 root 1.116 static struct ev_loop default_loop_struct;
619     struct ev_loop *ev_default_loop_ptr;
620 root 1.54
621 root 1.53 #else
622 root 1.54
623 root 1.86 ev_tstamp ev_rt_now;
624 root 1.80 #define VAR(name,decl) static decl;
625     #include "ev_vars.h"
626     #undef VAR
627    
628 root 1.116 static int ev_default_loop_ptr;
629 root 1.54
630 root 1.51 #endif
631 root 1.1
632 root 1.297 #if EV_MINIMAL < 2
633 root 1.298 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
634     # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
635 root 1.297 # define EV_INVOKE_PENDING invoke_cb (EV_A)
636     #else
637 root 1.298 # define EV_RELEASE_CB (void)0
638     # define EV_ACQUIRE_CB (void)0
639 root 1.297 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
640     #endif
641    
642 root 1.298 #define EVUNLOOP_RECURSE 0x80
643    
644 root 1.8 /*****************************************************************************/
645    
646 root 1.292 #ifndef EV_HAVE_EV_TIME
647 root 1.141 ev_tstamp
648 root 1.1 ev_time (void)
649     {
650 root 1.29 #if EV_USE_REALTIME
651 root 1.279 if (expect_true (have_realtime))
652     {
653     struct timespec ts;
654     clock_gettime (CLOCK_REALTIME, &ts);
655     return ts.tv_sec + ts.tv_nsec * 1e-9;
656     }
657     #endif
658    
659 root 1.1 struct timeval tv;
660     gettimeofday (&tv, 0);
661     return tv.tv_sec + tv.tv_usec * 1e-6;
662     }
663 root 1.292 #endif
664 root 1.1
665 root 1.284 inline_size ev_tstamp
666 root 1.1 get_clock (void)
667     {
668 root 1.29 #if EV_USE_MONOTONIC
669 root 1.40 if (expect_true (have_monotonic))
670 root 1.1 {
671     struct timespec ts;
672     clock_gettime (CLOCK_MONOTONIC, &ts);
673     return ts.tv_sec + ts.tv_nsec * 1e-9;
674     }
675     #endif
676    
677     return ev_time ();
678     }
679    
680 root 1.85 #if EV_MULTIPLICITY
681 root 1.51 ev_tstamp
682     ev_now (EV_P)
683     {
684 root 1.85 return ev_rt_now;
685 root 1.51 }
686 root 1.85 #endif
687 root 1.51
688 root 1.193 void
689     ev_sleep (ev_tstamp delay)
690     {
691     if (delay > 0.)
692     {
693     #if EV_USE_NANOSLEEP
694     struct timespec ts;
695    
696     ts.tv_sec = (time_t)delay;
697     ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
698    
699     nanosleep (&ts, 0);
700     #elif defined(_WIN32)
701 root 1.217 Sleep ((unsigned long)(delay * 1e3));
702 root 1.193 #else
703     struct timeval tv;
704    
705     tv.tv_sec = (time_t)delay;
706     tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
707    
708 root 1.257 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
709 root 1.302 /* something not guaranteed by newer posix versions, but guaranteed */
710 root 1.257 /* by older ones */
711 root 1.193 select (0, 0, 0, 0, &tv);
712     #endif
713     }
714     }
715    
716     /*****************************************************************************/
717    
718 root 1.233 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
719 root 1.232
720 root 1.288 /* find a suitable new size for the given array, */
721     /* hopefully by rounding to a ncie-to-malloc size */
722 root 1.284 inline_size int
723 root 1.163 array_nextsize (int elem, int cur, int cnt)
724     {
725     int ncur = cur + 1;
726    
727     do
728     ncur <<= 1;
729     while (cnt > ncur);
730    
731 root 1.232 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
732     if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
733 root 1.163 {
734     ncur *= elem;
735 root 1.232 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
736 root 1.163 ncur = ncur - sizeof (void *) * 4;
737     ncur /= elem;
738     }
739    
740     return ncur;
741     }
742    
743 root 1.171 static noinline void *
744 root 1.163 array_realloc (int elem, void *base, int *cur, int cnt)
745     {
746     *cur = array_nextsize (elem, *cur, cnt);
747     return ev_realloc (base, elem * *cur);
748     }
749 root 1.29
750 root 1.265 #define array_init_zero(base,count) \
751     memset ((void *)(base), 0, sizeof (*(base)) * (count))
752    
753 root 1.74 #define array_needsize(type,base,cur,cnt,init) \
754 root 1.163 if (expect_false ((cnt) > (cur))) \
755 root 1.69 { \
756 root 1.163 int ocur_ = (cur); \
757     (base) = (type *)array_realloc \
758     (sizeof (type), (base), &(cur), (cnt)); \
759     init ((base) + (ocur_), (cur) - ocur_); \
760 root 1.1 }
761    
762 root 1.163 #if 0
763 root 1.74 #define array_slim(type,stem) \
764 root 1.67 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
765     { \
766     stem ## max = array_roundsize (stem ## cnt >> 1); \
767 root 1.74 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
768 root 1.67 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
769     }
770 root 1.163 #endif
771 root 1.67
772 root 1.65 #define array_free(stem, idx) \
773 root 1.280 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
774 root 1.65
775 root 1.8 /*****************************************************************************/
776    
777 root 1.288 /* dummy callback for pending events */
778     static void noinline
779     pendingcb (EV_P_ ev_prepare *w, int revents)
780     {
781     }
782    
783 root 1.140 void noinline
784 root 1.78 ev_feed_event (EV_P_ void *w, int revents)
785 root 1.1 {
786 root 1.78 W w_ = (W)w;
787 root 1.171 int pri = ABSPRI (w_);
788 root 1.78
789 root 1.123 if (expect_false (w_->pending))
790 root 1.171 pendings [pri][w_->pending - 1].events |= revents;
791     else
792 root 1.32 {
793 root 1.171 w_->pending = ++pendingcnt [pri];
794     array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
795     pendings [pri][w_->pending - 1].w = w_;
796     pendings [pri][w_->pending - 1].events = revents;
797 root 1.32 }
798 root 1.1 }
799    
800 root 1.284 inline_speed void
801     feed_reverse (EV_P_ W w)
802     {
803     array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
804     rfeeds [rfeedcnt++] = w;
805     }
806    
807     inline_size void
808     feed_reverse_done (EV_P_ int revents)
809     {
810     do
811     ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
812     while (rfeedcnt);
813     }
814    
815     inline_speed void
816 root 1.51 queue_events (EV_P_ W *events, int eventcnt, int type)
817 root 1.27 {
818     int i;
819    
820     for (i = 0; i < eventcnt; ++i)
821 root 1.78 ev_feed_event (EV_A_ events [i], type);
822 root 1.27 }
823    
824 root 1.141 /*****************************************************************************/
825    
826 root 1.284 inline_speed void
827 root 1.298 fd_event_nc (EV_P_ int fd, int revents)
828 root 1.1 {
829     ANFD *anfd = anfds + fd;
830 root 1.136 ev_io *w;
831 root 1.1
832 root 1.136 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
833 root 1.1 {
834 root 1.79 int ev = w->events & revents;
835 root 1.1
836     if (ev)
837 root 1.78 ev_feed_event (EV_A_ (W)w, ev);
838 root 1.1 }
839     }
840    
841 root 1.298 /* do not submit kernel events for fds that have reify set */
842     /* because that means they changed while we were polling for new events */
843     inline_speed void
844     fd_event (EV_P_ int fd, int revents)
845     {
846     ANFD *anfd = anfds + fd;
847    
848     if (expect_true (!anfd->reify))
849     fd_event_nc (EV_A_ fd, revents);
850     }
851    
852 root 1.79 void
853     ev_feed_fd_event (EV_P_ int fd, int revents)
854     {
855 root 1.168 if (fd >= 0 && fd < anfdmax)
856 root 1.298 fd_event_nc (EV_A_ fd, revents);
857 root 1.79 }
858    
859 root 1.288 /* make sure the external fd watch events are in-sync */
860     /* with the kernel/libev internal state */
861 root 1.284 inline_size void
862 root 1.51 fd_reify (EV_P)
863 root 1.9 {
864     int i;
865    
866 root 1.27 for (i = 0; i < fdchangecnt; ++i)
867     {
868     int fd = fdchanges [i];
869     ANFD *anfd = anfds + fd;
870 root 1.136 ev_io *w;
871 root 1.27
872 root 1.184 unsigned char events = 0;
873 root 1.27
874 root 1.136 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
875 root 1.184 events |= (unsigned char)w->events;
876 root 1.27
877 root 1.103 #if EV_SELECT_IS_WINSOCKET
878     if (events)
879     {
880 root 1.254 unsigned long arg;
881 root 1.200 #ifdef EV_FD_TO_WIN32_HANDLE
882     anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
883     #else
884     anfd->handle = _get_osfhandle (fd);
885     #endif
886 root 1.278 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
887 root 1.103 }
888     #endif
889    
890 root 1.184 {
891     unsigned char o_events = anfd->events;
892     unsigned char o_reify = anfd->reify;
893    
894     anfd->reify = 0;
895     anfd->events = events;
896 root 1.27
897 root 1.281 if (o_events != events || o_reify & EV__IOFDSET)
898 root 1.184 backend_modify (EV_A_ fd, o_events, events);
899     }
900 root 1.27 }
901    
902     fdchangecnt = 0;
903     }
904    
905 root 1.288 /* something about the given fd changed */
906 root 1.284 inline_size void
907 root 1.183 fd_change (EV_P_ int fd, int flags)
908 root 1.27 {
909 root 1.183 unsigned char reify = anfds [fd].reify;
910 root 1.184 anfds [fd].reify |= flags;
911 root 1.27
912 root 1.183 if (expect_true (!reify))
913     {
914     ++fdchangecnt;
915     array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
916     fdchanges [fdchangecnt - 1] = fd;
917     }
918 root 1.9 }
919    
920 root 1.288 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
921 root 1.284 inline_speed void
922 root 1.51 fd_kill (EV_P_ int fd)
923 root 1.41 {
924 root 1.136 ev_io *w;
925 root 1.41
926 root 1.136 while ((w = (ev_io *)anfds [fd].head))
927 root 1.41 {
928 root 1.51 ev_io_stop (EV_A_ w);
929 root 1.78 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
930 root 1.41 }
931     }
932    
933 root 1.288 /* check whether the given fd is atcually valid, for error recovery */
934 root 1.284 inline_size int
935 root 1.71 fd_valid (int fd)
936     {
937 root 1.103 #ifdef _WIN32
938     return _get_osfhandle (fd) != -1;
939 root 1.71 #else
940     return fcntl (fd, F_GETFD) != -1;
941     #endif
942     }
943    
944 root 1.19 /* called on EBADF to verify fds */
945 root 1.140 static void noinline
946 root 1.51 fd_ebadf (EV_P)
947 root 1.19 {
948     int fd;
949    
950     for (fd = 0; fd < anfdmax; ++fd)
951 root 1.27 if (anfds [fd].events)
952 root 1.254 if (!fd_valid (fd) && errno == EBADF)
953 root 1.51 fd_kill (EV_A_ fd);
954 root 1.41 }
955    
956     /* called on ENOMEM in select/poll to kill some fds and retry */
957 root 1.140 static void noinline
958 root 1.51 fd_enomem (EV_P)
959 root 1.41 {
960 root 1.62 int fd;
961 root 1.41
962 root 1.62 for (fd = anfdmax; fd--; )
963 root 1.41 if (anfds [fd].events)
964     {
965 root 1.51 fd_kill (EV_A_ fd);
966 root 1.307 break;
967 root 1.41 }
968 root 1.19 }
969    
970 root 1.130 /* usually called after fork if backend needs to re-arm all fds from scratch */
971 root 1.140 static void noinline
972 root 1.56 fd_rearm_all (EV_P)
973     {
974     int fd;
975    
976     for (fd = 0; fd < anfdmax; ++fd)
977     if (anfds [fd].events)
978     {
979     anfds [fd].events = 0;
980 root 1.268 anfds [fd].emask = 0;
981 root 1.298 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
982 root 1.56 }
983     }
984    
985 root 1.8 /*****************************************************************************/
986    
987 root 1.235 /*
988 root 1.241 * the heap functions want a real array index. array index 0 uis guaranteed to not
989     * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
990     * the branching factor of the d-tree.
991     */
992    
993     /*
994 root 1.235 * at the moment we allow libev the luxury of two heaps,
995     * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
996     * which is more cache-efficient.
997     * the difference is about 5% with 50000+ watchers.
998     */
999 root 1.241 #if EV_USE_4HEAP
1000 root 1.235
1001 root 1.237 #define DHEAP 4
1002     #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1003 root 1.247 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1004 root 1.248 #define UPHEAP_DONE(p,k) ((p) == (k))
1005 root 1.235
1006     /* away from the root */
1007 root 1.284 inline_speed void
1008 root 1.241 downheap (ANHE *heap, int N, int k)
1009 root 1.235 {
1010 root 1.241 ANHE he = heap [k];
1011     ANHE *E = heap + N + HEAP0;
1012 root 1.235
1013     for (;;)
1014     {
1015     ev_tstamp minat;
1016 root 1.241 ANHE *minpos;
1017 root 1.248 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1018 root 1.235
1019 root 1.248 /* find minimum child */
1020 root 1.237 if (expect_true (pos + DHEAP - 1 < E))
1021 root 1.235 {
1022 root 1.245 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1023     if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1024     if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1025     if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1026 root 1.235 }
1027 root 1.240 else if (pos < E)
1028 root 1.235 {
1029 root 1.241 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1030     if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1031     if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1032     if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1033 root 1.235 }
1034 root 1.240 else
1035     break;
1036 root 1.235
1037 root 1.241 if (ANHE_at (he) <= minat)
1038 root 1.235 break;
1039    
1040 root 1.247 heap [k] = *minpos;
1041 root 1.241 ev_active (ANHE_w (*minpos)) = k;
1042 root 1.235
1043     k = minpos - heap;
1044     }
1045    
1046 root 1.247 heap [k] = he;
1047 root 1.241 ev_active (ANHE_w (he)) = k;
1048 root 1.235 }
1049    
1050 root 1.248 #else /* 4HEAP */
1051 root 1.235
1052     #define HEAP0 1
1053 root 1.247 #define HPARENT(k) ((k) >> 1)
1054 root 1.248 #define UPHEAP_DONE(p,k) (!(p))
1055 root 1.235
1056 root 1.248 /* away from the root */
1057 root 1.284 inline_speed void
1058 root 1.248 downheap (ANHE *heap, int N, int k)
1059 root 1.1 {
1060 root 1.241 ANHE he = heap [k];
1061 root 1.1
1062 root 1.228 for (;;)
1063 root 1.1 {
1064 root 1.248 int c = k << 1;
1065 root 1.179
1066 root 1.309 if (c >= N + HEAP0)
1067 root 1.179 break;
1068    
1069 root 1.248 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1070     ? 1 : 0;
1071    
1072     if (ANHE_at (he) <= ANHE_at (heap [c]))
1073     break;
1074    
1075     heap [k] = heap [c];
1076 root 1.241 ev_active (ANHE_w (heap [k])) = k;
1077 root 1.248
1078     k = c;
1079 root 1.1 }
1080    
1081 root 1.243 heap [k] = he;
1082 root 1.248 ev_active (ANHE_w (he)) = k;
1083 root 1.1 }
1084 root 1.248 #endif
1085 root 1.1
1086 root 1.248 /* towards the root */
1087 root 1.284 inline_speed void
1088 root 1.248 upheap (ANHE *heap, int k)
1089 root 1.1 {
1090 root 1.241 ANHE he = heap [k];
1091 root 1.1
1092 root 1.179 for (;;)
1093 root 1.1 {
1094 root 1.248 int p = HPARENT (k);
1095 root 1.179
1096 root 1.248 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1097 root 1.179 break;
1098 root 1.1
1099 root 1.248 heap [k] = heap [p];
1100 root 1.241 ev_active (ANHE_w (heap [k])) = k;
1101 root 1.248 k = p;
1102 root 1.1 }
1103    
1104 root 1.241 heap [k] = he;
1105     ev_active (ANHE_w (he)) = k;
1106 root 1.1 }
1107    
1108 root 1.288 /* move an element suitably so it is in a correct place */
1109 root 1.284 inline_size void
1110 root 1.241 adjustheap (ANHE *heap, int N, int k)
1111 root 1.84 {
1112 root 1.310 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1113 root 1.247 upheap (heap, k);
1114     else
1115     downheap (heap, N, k);
1116 root 1.84 }
1117    
1118 root 1.248 /* rebuild the heap: this function is used only once and executed rarely */
1119 root 1.284 inline_size void
1120 root 1.248 reheap (ANHE *heap, int N)
1121     {
1122     int i;
1123 root 1.251
1124 root 1.248 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1125     /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1126     for (i = 0; i < N; ++i)
1127     upheap (heap, i + HEAP0);
1128     }
1129    
1130 root 1.8 /*****************************************************************************/
1131    
1132 root 1.288 /* associate signal watchers to a signal signal */
1133 root 1.7 typedef struct
1134     {
1135 root 1.307 EV_ATOMIC_T pending;
1136 root 1.306 #if EV_MULTIPLICITY
1137     EV_P;
1138     #endif
1139 root 1.68 WL head;
1140 root 1.7 } ANSIG;
1141    
1142 root 1.306 static ANSIG signals [EV_NSIG - 1];
1143 root 1.7
1144 root 1.207 /*****************************************************************************/
1145    
1146 root 1.288 /* used to prepare libev internal fd's */
1147     /* this is not fork-safe */
1148 root 1.284 inline_speed void
1149 root 1.207 fd_intern (int fd)
1150     {
1151     #ifdef _WIN32
1152 root 1.254 unsigned long arg = 1;
1153 root 1.207 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1154     #else
1155     fcntl (fd, F_SETFD, FD_CLOEXEC);
1156     fcntl (fd, F_SETFL, O_NONBLOCK);
1157     #endif
1158     }
1159    
1160     static void noinline
1161     evpipe_init (EV_P)
1162     {
1163 root 1.288 if (!ev_is_active (&pipe_w))
1164 root 1.207 {
1165 root 1.220 #if EV_USE_EVENTFD
1166 root 1.303 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1167     if (evfd < 0 && errno == EINVAL)
1168     evfd = eventfd (0, 0);
1169    
1170     if (evfd >= 0)
1171 root 1.220 {
1172     evpipe [0] = -1;
1173 root 1.303 fd_intern (evfd); /* doing it twice doesn't hurt */
1174 root 1.288 ev_io_set (&pipe_w, evfd, EV_READ);
1175 root 1.220 }
1176     else
1177     #endif
1178     {
1179     while (pipe (evpipe))
1180 root 1.269 ev_syserr ("(libev) error creating signal/async pipe");
1181 root 1.207
1182 root 1.220 fd_intern (evpipe [0]);
1183     fd_intern (evpipe [1]);
1184 root 1.288 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1185 root 1.220 }
1186 root 1.207
1187 root 1.288 ev_io_start (EV_A_ &pipe_w);
1188 root 1.210 ev_unref (EV_A); /* watcher should not keep loop alive */
1189 root 1.207 }
1190     }
1191    
1192 root 1.284 inline_size void
1193 root 1.214 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1194 root 1.207 {
1195 root 1.214 if (!*flag)
1196 root 1.207 {
1197 ayin 1.215 int old_errno = errno; /* save errno because write might clobber it */
1198 root 1.214
1199     *flag = 1;
1200 root 1.220
1201     #if EV_USE_EVENTFD
1202     if (evfd >= 0)
1203     {
1204     uint64_t counter = 1;
1205     write (evfd, &counter, sizeof (uint64_t));
1206     }
1207     else
1208     #endif
1209     write (evpipe [1], &old_errno, 1);
1210 root 1.214
1211 root 1.207 errno = old_errno;
1212     }
1213     }
1214    
1215 root 1.288 /* called whenever the libev signal pipe */
1216     /* got some events (signal, async) */
1217 root 1.207 static void
1218     pipecb (EV_P_ ev_io *iow, int revents)
1219     {
1220 root 1.307 int i;
1221    
1222 root 1.220 #if EV_USE_EVENTFD
1223     if (evfd >= 0)
1224     {
1225 root 1.232 uint64_t counter;
1226 root 1.220 read (evfd, &counter, sizeof (uint64_t));
1227     }
1228     else
1229     #endif
1230     {
1231     char dummy;
1232     read (evpipe [0], &dummy, 1);
1233     }
1234 root 1.207
1235 root 1.307 if (sig_pending)
1236 root 1.207 {
1237 root 1.307 sig_pending = 0;
1238 root 1.207
1239 root 1.307 for (i = EV_NSIG - 1; i--; )
1240     if (expect_false (signals [i].pending))
1241     ev_feed_signal_event (EV_A_ i + 1);
1242 root 1.207 }
1243    
1244 root 1.209 #if EV_ASYNC_ENABLE
1245 root 1.307 if (async_pending)
1246 root 1.207 {
1247 root 1.307 async_pending = 0;
1248 root 1.207
1249     for (i = asynccnt; i--; )
1250     if (asyncs [i]->sent)
1251     {
1252     asyncs [i]->sent = 0;
1253     ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1254     }
1255     }
1256 root 1.209 #endif
1257 root 1.207 }
1258    
1259     /*****************************************************************************/
1260    
1261 root 1.7 static void
1262 root 1.218 ev_sighandler (int signum)
1263 root 1.7 {
1264 root 1.207 #if EV_MULTIPLICITY
1265 root 1.306 EV_P = signals [signum - 1].loop;
1266 root 1.207 #endif
1267    
1268 root 1.103 #if _WIN32
1269 root 1.218 signal (signum, ev_sighandler);
1270 root 1.67 #endif
1271    
1272 root 1.307 signals [signum - 1].pending = 1;
1273     evpipe_write (EV_A_ &sig_pending);
1274 root 1.7 }
1275    
1276 root 1.140 void noinline
1277 root 1.79 ev_feed_signal_event (EV_P_ int signum)
1278     {
1279 root 1.80 WL w;
1280    
1281 root 1.307 if (expect_false (signum <= 0 || signum > EV_NSIG))
1282     return;
1283    
1284     --signum;
1285    
1286 root 1.79 #if EV_MULTIPLICITY
1287 root 1.307 /* it is permissible to try to feed a signal to the wrong loop */
1288     /* or, likely more useful, feeding a signal nobody is waiting for */
1289 root 1.79
1290 root 1.307 if (expect_false (signals [signum].loop != EV_A))
1291 root 1.306 return;
1292 root 1.307 #endif
1293 root 1.306
1294 root 1.307 signals [signum].pending = 0;
1295 root 1.79
1296     for (w = signals [signum].head; w; w = w->next)
1297     ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1298     }
1299    
1300 root 1.303 #if EV_USE_SIGNALFD
1301     static void
1302     sigfdcb (EV_P_ ev_io *iow, int revents)
1303     {
1304 root 1.306 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1305 root 1.303
1306     for (;;)
1307     {
1308     ssize_t res = read (sigfd, si, sizeof (si));
1309    
1310     /* not ISO-C, as res might be -1, but works with SuS */
1311     for (sip = si; (char *)sip < (char *)si + res; ++sip)
1312     ev_feed_signal_event (EV_A_ sip->ssi_signo);
1313    
1314     if (res < (ssize_t)sizeof (si))
1315     break;
1316     }
1317     }
1318     #endif
1319    
1320 root 1.8 /*****************************************************************************/
1321    
1322 root 1.182 static WL childs [EV_PID_HASHSIZE];
1323 root 1.71
1324 root 1.103 #ifndef _WIN32
1325 root 1.45
1326 root 1.136 static ev_signal childev;
1327 root 1.59
1328 root 1.206 #ifndef WIFCONTINUED
1329     # define WIFCONTINUED(status) 0
1330     #endif
1331    
1332 root 1.288 /* handle a single child status event */
1333 root 1.284 inline_speed void
1334 root 1.216 child_reap (EV_P_ int chain, int pid, int status)
1335 root 1.47 {
1336 root 1.136 ev_child *w;
1337 root 1.206 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1338 root 1.47
1339 root 1.149 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1340 root 1.206 {
1341     if ((w->pid == pid || !w->pid)
1342     && (!traced || (w->flags & 1)))
1343     {
1344 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 */
1345 root 1.206 w->rpid = pid;
1346     w->rstatus = status;
1347     ev_feed_event (EV_A_ (W)w, EV_CHILD);
1348     }
1349     }
1350 root 1.47 }
1351    
1352 root 1.142 #ifndef WCONTINUED
1353     # define WCONTINUED 0
1354     #endif
1355    
1356 root 1.288 /* called on sigchld etc., calls waitpid */
1357 root 1.47 static void
1358 root 1.136 childcb (EV_P_ ev_signal *sw, int revents)
1359 root 1.22 {
1360     int pid, status;
1361    
1362 root 1.142 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1363     if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1364     if (!WCONTINUED
1365     || errno != EINVAL
1366     || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1367     return;
1368    
1369 root 1.216 /* make sure we are called again until all children have been reaped */
1370 root 1.142 /* we need to do it this way so that the callback gets called before we continue */
1371     ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1372 root 1.47
1373 root 1.216 child_reap (EV_A_ pid, pid, status);
1374 root 1.149 if (EV_PID_HASHSIZE > 1)
1375 root 1.216 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1376 root 1.22 }
1377    
1378 root 1.45 #endif
1379    
1380 root 1.22 /*****************************************************************************/
1381    
1382 root 1.118 #if EV_USE_PORT
1383     # include "ev_port.c"
1384     #endif
1385 root 1.44 #if EV_USE_KQUEUE
1386     # include "ev_kqueue.c"
1387     #endif
1388 root 1.29 #if EV_USE_EPOLL
1389 root 1.1 # include "ev_epoll.c"
1390     #endif
1391 root 1.59 #if EV_USE_POLL
1392 root 1.41 # include "ev_poll.c"
1393     #endif
1394 root 1.29 #if EV_USE_SELECT
1395 root 1.1 # include "ev_select.c"
1396     #endif
1397    
1398 root 1.24 int
1399     ev_version_major (void)
1400     {
1401     return EV_VERSION_MAJOR;
1402     }
1403    
1404     int
1405     ev_version_minor (void)
1406     {
1407     return EV_VERSION_MINOR;
1408     }
1409    
1410 root 1.49 /* return true if we are running with elevated privileges and should ignore env variables */
1411 root 1.140 int inline_size
1412 root 1.51 enable_secure (void)
1413 root 1.41 {
1414 root 1.103 #ifdef _WIN32
1415 root 1.49 return 0;
1416     #else
1417 root 1.41 return getuid () != geteuid ()
1418     || getgid () != getegid ();
1419 root 1.49 #endif
1420 root 1.41 }
1421    
1422 root 1.111 unsigned int
1423 root 1.129 ev_supported_backends (void)
1424     {
1425 root 1.130 unsigned int flags = 0;
1426 root 1.129
1427     if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1428     if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1429     if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1430     if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1431     if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1432    
1433     return flags;
1434     }
1435    
1436     unsigned int
1437 root 1.130 ev_recommended_backends (void)
1438 root 1.1 {
1439 root 1.131 unsigned int flags = ev_supported_backends ();
1440 root 1.129
1441     #ifndef __NetBSD__
1442     /* kqueue is borked on everything but netbsd apparently */
1443     /* it usually doesn't work correctly on anything but sockets and pipes */
1444     flags &= ~EVBACKEND_KQUEUE;
1445     #endif
1446     #ifdef __APPLE__
1447 root 1.278 /* only select works correctly on that "unix-certified" platform */
1448     flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1449     flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1450 root 1.129 #endif
1451    
1452     return flags;
1453 root 1.51 }
1454    
1455 root 1.130 unsigned int
1456 root 1.134 ev_embeddable_backends (void)
1457     {
1458 root 1.196 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1459    
1460 root 1.192 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1461 root 1.196 /* please fix it and tell me how to detect the fix */
1462     flags &= ~EVBACKEND_EPOLL;
1463    
1464     return flags;
1465 root 1.134 }
1466    
1467     unsigned int
1468 root 1.130 ev_backend (EV_P)
1469     {
1470     return backend;
1471     }
1472    
1473 root 1.297 #if EV_MINIMAL < 2
1474 root 1.162 unsigned int
1475     ev_loop_count (EV_P)
1476     {
1477     return loop_count;
1478     }
1479    
1480 root 1.294 unsigned int
1481     ev_loop_depth (EV_P)
1482     {
1483     return loop_depth;
1484     }
1485    
1486 root 1.193 void
1487     ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1488     {
1489     io_blocktime = interval;
1490     }
1491    
1492     void
1493     ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1494     {
1495     timeout_blocktime = interval;
1496     }
1497    
1498 root 1.297 void
1499     ev_set_userdata (EV_P_ void *data)
1500     {
1501     userdata = data;
1502     }
1503    
1504     void *
1505     ev_userdata (EV_P)
1506     {
1507     return userdata;
1508     }
1509    
1510     void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1511     {
1512     invoke_cb = invoke_pending_cb;
1513     }
1514    
1515 root 1.298 void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1516 root 1.297 {
1517 root 1.298 release_cb = release;
1518     acquire_cb = acquire;
1519 root 1.297 }
1520     #endif
1521    
1522 root 1.288 /* initialise a loop structure, must be zero-initialised */
1523 root 1.151 static void noinline
1524 root 1.108 loop_init (EV_P_ unsigned int flags)
1525 root 1.51 {
1526 root 1.130 if (!backend)
1527 root 1.23 {
1528 root 1.279 #if EV_USE_REALTIME
1529     if (!have_realtime)
1530     {
1531     struct timespec ts;
1532    
1533     if (!clock_gettime (CLOCK_REALTIME, &ts))
1534     have_realtime = 1;
1535     }
1536     #endif
1537    
1538 root 1.29 #if EV_USE_MONOTONIC
1539 root 1.279 if (!have_monotonic)
1540     {
1541     struct timespec ts;
1542    
1543     if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1544     have_monotonic = 1;
1545     }
1546 root 1.1 #endif
1547    
1548 root 1.306 /* pid check not overridable via env */
1549     #ifndef _WIN32
1550     if (flags & EVFLAG_FORKCHECK)
1551     curpid = getpid ();
1552     #endif
1553    
1554     if (!(flags & EVFLAG_NOENV)
1555     && !enable_secure ()
1556     && getenv ("LIBEV_FLAGS"))
1557     flags = atoi (getenv ("LIBEV_FLAGS"));
1558    
1559 root 1.209 ev_rt_now = ev_time ();
1560     mn_now = get_clock ();
1561     now_floor = mn_now;
1562     rtmn_diff = ev_rt_now - mn_now;
1563 root 1.297 #if EV_MINIMAL < 2
1564 root 1.296 invoke_cb = ev_invoke_pending;
1565 root 1.297 #endif
1566 root 1.1
1567 root 1.193 io_blocktime = 0.;
1568     timeout_blocktime = 0.;
1569 root 1.209 backend = 0;
1570     backend_fd = -1;
1571 root 1.307 sig_pending = 0;
1572     #if EV_ASYNC_ENABLE
1573     async_pending = 0;
1574     #endif
1575 root 1.209 #if EV_USE_INOTIFY
1576 root 1.306 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1577 root 1.209 #endif
1578 root 1.303 #if EV_USE_SIGNALFD
1579 root 1.306 sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2;
1580 root 1.303 #endif
1581 root 1.193
1582 root 1.225 if (!(flags & 0x0000ffffU))
1583 root 1.129 flags |= ev_recommended_backends ();
1584 root 1.41
1585 root 1.118 #if EV_USE_PORT
1586 root 1.130 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1587 root 1.118 #endif
1588 root 1.44 #if EV_USE_KQUEUE
1589 root 1.130 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1590 root 1.44 #endif
1591 root 1.29 #if EV_USE_EPOLL
1592 root 1.130 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1593 root 1.41 #endif
1594 root 1.59 #if EV_USE_POLL
1595 root 1.130 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1596 root 1.1 #endif
1597 root 1.29 #if EV_USE_SELECT
1598 root 1.130 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1599 root 1.1 #endif
1600 root 1.70
1601 root 1.288 ev_prepare_init (&pending_w, pendingcb);
1602    
1603     ev_init (&pipe_w, pipecb);
1604     ev_set_priority (&pipe_w, EV_MAXPRI);
1605 root 1.56 }
1606     }
1607    
1608 root 1.288 /* free up a loop structure */
1609 root 1.151 static void noinline
1610 root 1.56 loop_destroy (EV_P)
1611     {
1612 root 1.65 int i;
1613    
1614 root 1.288 if (ev_is_active (&pipe_w))
1615 root 1.207 {
1616 root 1.303 /*ev_ref (EV_A);*/
1617     /*ev_io_stop (EV_A_ &pipe_w);*/
1618 root 1.207
1619 root 1.220 #if EV_USE_EVENTFD
1620     if (evfd >= 0)
1621     close (evfd);
1622     #endif
1623    
1624     if (evpipe [0] >= 0)
1625     {
1626     close (evpipe [0]);
1627     close (evpipe [1]);
1628     }
1629 root 1.207 }
1630    
1631 root 1.303 #if EV_USE_SIGNALFD
1632     if (ev_is_active (&sigfd_w))
1633     {
1634     /*ev_ref (EV_A);*/
1635     /*ev_io_stop (EV_A_ &sigfd_w);*/
1636    
1637     close (sigfd);
1638     }
1639     #endif
1640    
1641 root 1.152 #if EV_USE_INOTIFY
1642     if (fs_fd >= 0)
1643     close (fs_fd);
1644     #endif
1645    
1646     if (backend_fd >= 0)
1647     close (backend_fd);
1648    
1649 root 1.118 #if EV_USE_PORT
1650 root 1.130 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1651 root 1.118 #endif
1652 root 1.56 #if EV_USE_KQUEUE
1653 root 1.130 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1654 root 1.56 #endif
1655     #if EV_USE_EPOLL
1656 root 1.130 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1657 root 1.56 #endif
1658 root 1.59 #if EV_USE_POLL
1659 root 1.130 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1660 root 1.56 #endif
1661     #if EV_USE_SELECT
1662 root 1.130 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1663 root 1.56 #endif
1664 root 1.1
1665 root 1.65 for (i = NUMPRI; i--; )
1666 root 1.164 {
1667     array_free (pending, [i]);
1668     #if EV_IDLE_ENABLE
1669     array_free (idle, [i]);
1670     #endif
1671     }
1672 root 1.65
1673 root 1.305 ev_free (anfds); anfds = 0; anfdmax = 0;
1674 root 1.186
1675 root 1.71 /* have to use the microsoft-never-gets-it-right macro */
1676 root 1.284 array_free (rfeed, EMPTY);
1677 root 1.164 array_free (fdchange, EMPTY);
1678     array_free (timer, EMPTY);
1679 root 1.140 #if EV_PERIODIC_ENABLE
1680 root 1.164 array_free (periodic, EMPTY);
1681 root 1.93 #endif
1682 root 1.187 #if EV_FORK_ENABLE
1683     array_free (fork, EMPTY);
1684     #endif
1685 root 1.164 array_free (prepare, EMPTY);
1686     array_free (check, EMPTY);
1687 root 1.209 #if EV_ASYNC_ENABLE
1688     array_free (async, EMPTY);
1689     #endif
1690 root 1.65
1691 root 1.130 backend = 0;
1692 root 1.56 }
1693 root 1.22
1694 root 1.226 #if EV_USE_INOTIFY
1695 root 1.284 inline_size void infy_fork (EV_P);
1696 root 1.226 #endif
1697 root 1.154
1698 root 1.284 inline_size void
1699 root 1.56 loop_fork (EV_P)
1700     {
1701 root 1.118 #if EV_USE_PORT
1702 root 1.130 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1703 root 1.56 #endif
1704     #if EV_USE_KQUEUE
1705 root 1.130 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1706 root 1.45 #endif
1707 root 1.118 #if EV_USE_EPOLL
1708 root 1.130 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1709 root 1.118 #endif
1710 root 1.154 #if EV_USE_INOTIFY
1711     infy_fork (EV_A);
1712     #endif
1713 root 1.70
1714 root 1.288 if (ev_is_active (&pipe_w))
1715 root 1.70 {
1716 root 1.207 /* this "locks" the handlers against writing to the pipe */
1717 root 1.212 /* while we modify the fd vars */
1718 root 1.307 sig_pending = 1;
1719 root 1.212 #if EV_ASYNC_ENABLE
1720 root 1.307 async_pending = 1;
1721 root 1.212 #endif
1722 root 1.70
1723     ev_ref (EV_A);
1724 root 1.288 ev_io_stop (EV_A_ &pipe_w);
1725 root 1.220
1726     #if EV_USE_EVENTFD
1727     if (evfd >= 0)
1728     close (evfd);
1729     #endif
1730    
1731     if (evpipe [0] >= 0)
1732     {
1733     close (evpipe [0]);
1734     close (evpipe [1]);
1735     }
1736 root 1.207
1737     evpipe_init (EV_A);
1738 root 1.208 /* now iterate over everything, in case we missed something */
1739 root 1.288 pipecb (EV_A_ &pipe_w, EV_READ);
1740 root 1.70 }
1741    
1742     postfork = 0;
1743 root 1.1 }
1744    
1745 root 1.55 #if EV_MULTIPLICITY
1746 root 1.250
1747 root 1.54 struct ev_loop *
1748 root 1.108 ev_loop_new (unsigned int flags)
1749 root 1.54 {
1750 root 1.306 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1751 root 1.69
1752 root 1.306 memset (EV_A, 0, sizeof (struct ev_loop));
1753 root 1.108 loop_init (EV_A_ flags);
1754 root 1.56
1755 root 1.130 if (ev_backend (EV_A))
1756 root 1.306 return EV_A;
1757 root 1.54
1758 root 1.55 return 0;
1759 root 1.54 }
1760    
1761     void
1762 root 1.56 ev_loop_destroy (EV_P)
1763 root 1.54 {
1764 root 1.56 loop_destroy (EV_A);
1765 root 1.69 ev_free (loop);
1766 root 1.54 }
1767    
1768 root 1.56 void
1769     ev_loop_fork (EV_P)
1770     {
1771 root 1.205 postfork = 1; /* must be in line with ev_default_fork */
1772 root 1.56 }
1773 root 1.297 #endif /* multiplicity */
1774 root 1.248
1775     #if EV_VERIFY
1776 root 1.258 static void noinline
1777 root 1.251 verify_watcher (EV_P_ W w)
1778     {
1779 root 1.278 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1780 root 1.251
1781     if (w->pending)
1782 root 1.278 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1783 root 1.251 }
1784    
1785     static void noinline
1786     verify_heap (EV_P_ ANHE *heap, int N)
1787     {
1788     int i;
1789    
1790     for (i = HEAP0; i < N + HEAP0; ++i)
1791     {
1792 root 1.278 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1793     assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1794     assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1795 root 1.251
1796     verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1797     }
1798     }
1799    
1800     static void noinline
1801     array_verify (EV_P_ W *ws, int cnt)
1802 root 1.248 {
1803     while (cnt--)
1804 root 1.251 {
1805 root 1.278 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1806 root 1.251 verify_watcher (EV_A_ ws [cnt]);
1807     }
1808 root 1.248 }
1809 root 1.250 #endif
1810 root 1.248
1811 root 1.297 #if EV_MINIMAL < 2
1812 root 1.250 void
1813 root 1.248 ev_loop_verify (EV_P)
1814     {
1815 root 1.250 #if EV_VERIFY
1816 root 1.248 int i;
1817 root 1.251 WL w;
1818    
1819     assert (activecnt >= -1);
1820    
1821     assert (fdchangemax >= fdchangecnt);
1822     for (i = 0; i < fdchangecnt; ++i)
1823 root 1.278 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1824 root 1.251
1825     assert (anfdmax >= 0);
1826     for (i = 0; i < anfdmax; ++i)
1827     for (w = anfds [i].head; w; w = w->next)
1828     {
1829     verify_watcher (EV_A_ (W)w);
1830 root 1.278 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1831     assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1832 root 1.251 }
1833    
1834     assert (timermax >= timercnt);
1835     verify_heap (EV_A_ timers, timercnt);
1836 root 1.248
1837     #if EV_PERIODIC_ENABLE
1838 root 1.251 assert (periodicmax >= periodiccnt);
1839     verify_heap (EV_A_ periodics, periodiccnt);
1840 root 1.248 #endif
1841    
1842 root 1.251 for (i = NUMPRI; i--; )
1843     {
1844     assert (pendingmax [i] >= pendingcnt [i]);
1845 root 1.248 #if EV_IDLE_ENABLE
1846 root 1.252 assert (idleall >= 0);
1847 root 1.251 assert (idlemax [i] >= idlecnt [i]);
1848     array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1849 root 1.248 #endif
1850 root 1.251 }
1851    
1852 root 1.248 #if EV_FORK_ENABLE
1853 root 1.251 assert (forkmax >= forkcnt);
1854     array_verify (EV_A_ (W *)forks, forkcnt);
1855 root 1.248 #endif
1856 root 1.251
1857 root 1.250 #if EV_ASYNC_ENABLE
1858 root 1.251 assert (asyncmax >= asynccnt);
1859     array_verify (EV_A_ (W *)asyncs, asynccnt);
1860 root 1.250 #endif
1861 root 1.251
1862     assert (preparemax >= preparecnt);
1863     array_verify (EV_A_ (W *)prepares, preparecnt);
1864    
1865     assert (checkmax >= checkcnt);
1866     array_verify (EV_A_ (W *)checks, checkcnt);
1867    
1868     # if 0
1869     for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1870 root 1.307 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1871 root 1.251 # endif
1872 root 1.248 #endif
1873     }
1874 root 1.297 #endif
1875 root 1.56
1876     #if EV_MULTIPLICITY
1877     struct ev_loop *
1878 root 1.125 ev_default_loop_init (unsigned int flags)
1879 root 1.54 #else
1880     int
1881 root 1.116 ev_default_loop (unsigned int flags)
1882 root 1.56 #endif
1883 root 1.54 {
1884 root 1.116 if (!ev_default_loop_ptr)
1885 root 1.56 {
1886     #if EV_MULTIPLICITY
1887 root 1.306 EV_P = ev_default_loop_ptr = &default_loop_struct;
1888 root 1.56 #else
1889 ayin 1.117 ev_default_loop_ptr = 1;
1890 root 1.54 #endif
1891    
1892 root 1.110 loop_init (EV_A_ flags);
1893 root 1.56
1894 root 1.130 if (ev_backend (EV_A))
1895 root 1.56 {
1896 root 1.103 #ifndef _WIN32
1897 root 1.56 ev_signal_init (&childev, childcb, SIGCHLD);
1898     ev_set_priority (&childev, EV_MAXPRI);
1899     ev_signal_start (EV_A_ &childev);
1900     ev_unref (EV_A); /* child watcher should not keep loop alive */
1901     #endif
1902     }
1903     else
1904 root 1.116 ev_default_loop_ptr = 0;
1905 root 1.56 }
1906 root 1.8
1907 root 1.116 return ev_default_loop_ptr;
1908 root 1.1 }
1909    
1910 root 1.24 void
1911 root 1.56 ev_default_destroy (void)
1912 root 1.1 {
1913 root 1.57 #if EV_MULTIPLICITY
1914 root 1.306 EV_P = ev_default_loop_ptr;
1915 root 1.57 #endif
1916 root 1.56
1917 root 1.266 ev_default_loop_ptr = 0;
1918    
1919 root 1.103 #ifndef _WIN32
1920 root 1.56 ev_ref (EV_A); /* child watcher */
1921     ev_signal_stop (EV_A_ &childev);
1922 root 1.71 #endif
1923 root 1.56
1924     loop_destroy (EV_A);
1925 root 1.1 }
1926    
1927 root 1.24 void
1928 root 1.60 ev_default_fork (void)
1929 root 1.1 {
1930 root 1.60 #if EV_MULTIPLICITY
1931 root 1.306 EV_P = ev_default_loop_ptr;
1932 root 1.60 #endif
1933    
1934 root 1.270 postfork = 1; /* must be in line with ev_loop_fork */
1935 root 1.1 }
1936    
1937 root 1.8 /*****************************************************************************/
1938    
1939 root 1.168 void
1940     ev_invoke (EV_P_ void *w, int revents)
1941     {
1942     EV_CB_INVOKE ((W)w, revents);
1943     }
1944    
1945 root 1.300 unsigned int
1946     ev_pending_count (EV_P)
1947     {
1948     int pri;
1949     unsigned int count = 0;
1950    
1951     for (pri = NUMPRI; pri--; )
1952     count += pendingcnt [pri];
1953    
1954     return count;
1955     }
1956    
1957 root 1.297 void noinline
1958 root 1.296 ev_invoke_pending (EV_P)
1959 root 1.1 {
1960 root 1.42 int pri;
1961    
1962     for (pri = NUMPRI; pri--; )
1963     while (pendingcnt [pri])
1964     {
1965     ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1966 root 1.1
1967 root 1.288 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1968     /* ^ this is no longer true, as pending_w could be here */
1969 root 1.139
1970 root 1.288 p->w->pending = 0;
1971     EV_CB_INVOKE (p->w, p->events);
1972     EV_FREQUENT_CHECK;
1973 root 1.42 }
1974 root 1.1 }
1975    
1976 root 1.234 #if EV_IDLE_ENABLE
1977 root 1.288 /* make idle watchers pending. this handles the "call-idle */
1978     /* only when higher priorities are idle" logic */
1979 root 1.284 inline_size void
1980 root 1.234 idle_reify (EV_P)
1981     {
1982     if (expect_false (idleall))
1983     {
1984     int pri;
1985    
1986     for (pri = NUMPRI; pri--; )
1987     {
1988     if (pendingcnt [pri])
1989     break;
1990    
1991     if (idlecnt [pri])
1992     {
1993     queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1994     break;
1995     }
1996     }
1997     }
1998     }
1999     #endif
2000    
2001 root 1.288 /* make timers pending */
2002 root 1.284 inline_size void
2003 root 1.51 timers_reify (EV_P)
2004 root 1.1 {
2005 root 1.248 EV_FREQUENT_CHECK;
2006    
2007 root 1.284 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2008 root 1.1 {
2009 root 1.284 do
2010     {
2011     ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2012 root 1.1
2013 root 1.284 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2014    
2015     /* first reschedule or stop timer */
2016     if (w->repeat)
2017     {
2018     ev_at (w) += w->repeat;
2019     if (ev_at (w) < mn_now)
2020     ev_at (w) = mn_now;
2021 root 1.61
2022 root 1.284 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2023 root 1.90
2024 root 1.284 ANHE_at_cache (timers [HEAP0]);
2025     downheap (timers, timercnt, HEAP0);
2026     }
2027     else
2028     ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2029 root 1.243
2030 root 1.284 EV_FREQUENT_CHECK;
2031     feed_reverse (EV_A_ (W)w);
2032 root 1.12 }
2033 root 1.284 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2034 root 1.30
2035 root 1.284 feed_reverse_done (EV_A_ EV_TIMEOUT);
2036 root 1.12 }
2037     }
2038 root 1.4
2039 root 1.140 #if EV_PERIODIC_ENABLE
2040 root 1.288 /* make periodics pending */
2041 root 1.284 inline_size void
2042 root 1.51 periodics_reify (EV_P)
2043 root 1.12 {
2044 root 1.248 EV_FREQUENT_CHECK;
2045 root 1.250
2046 root 1.244 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2047 root 1.12 {
2048 root 1.284 int feed_count = 0;
2049    
2050     do
2051     {
2052     ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2053 root 1.1
2054 root 1.284 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2055 root 1.61
2056 root 1.284 /* first reschedule or stop timer */
2057     if (w->reschedule_cb)
2058     {
2059     ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2060 root 1.243
2061 root 1.284 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2062 root 1.243
2063 root 1.284 ANHE_at_cache (periodics [HEAP0]);
2064     downheap (periodics, periodiccnt, HEAP0);
2065     }
2066     else if (w->interval)
2067 root 1.246 {
2068 root 1.284 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2069     /* if next trigger time is not sufficiently in the future, put it there */
2070     /* this might happen because of floating point inexactness */
2071     if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2072     {
2073     ev_at (w) += w->interval;
2074    
2075     /* if interval is unreasonably low we might still have a time in the past */
2076     /* so correct this. this will make the periodic very inexact, but the user */
2077     /* has effectively asked to get triggered more often than possible */
2078     if (ev_at (w) < ev_rt_now)
2079     ev_at (w) = ev_rt_now;
2080     }
2081 root 1.243
2082 root 1.284 ANHE_at_cache (periodics [HEAP0]);
2083     downheap (periodics, periodiccnt, HEAP0);
2084 root 1.246 }
2085 root 1.284 else
2086     ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2087 root 1.243
2088 root 1.284 EV_FREQUENT_CHECK;
2089     feed_reverse (EV_A_ (W)w);
2090 root 1.1 }
2091 root 1.284 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2092 root 1.12
2093 root 1.284 feed_reverse_done (EV_A_ EV_PERIODIC);
2094 root 1.12 }
2095     }
2096    
2097 root 1.288 /* simply recalculate all periodics */
2098     /* TODO: maybe ensure that at leats one event happens when jumping forward? */
2099 root 1.140 static void noinline
2100 root 1.54 periodics_reschedule (EV_P)
2101 root 1.12 {
2102     int i;
2103    
2104 root 1.13 /* adjust periodics after time jump */
2105 root 1.241 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2106 root 1.12 {
2107 root 1.241 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2108 root 1.12
2109 root 1.77 if (w->reschedule_cb)
2110 root 1.228 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2111 root 1.77 else if (w->interval)
2112 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2113 root 1.242
2114 root 1.248 ANHE_at_cache (periodics [i]);
2115 root 1.77 }
2116 root 1.12
2117 root 1.248 reheap (periodics, periodiccnt);
2118 root 1.1 }
2119 root 1.93 #endif
2120 root 1.1
2121 root 1.288 /* adjust all timers by a given offset */
2122 root 1.285 static void noinline
2123     timers_reschedule (EV_P_ ev_tstamp adjust)
2124     {
2125     int i;
2126    
2127     for (i = 0; i < timercnt; ++i)
2128     {
2129     ANHE *he = timers + i + HEAP0;
2130     ANHE_w (*he)->at += adjust;
2131     ANHE_at_cache (*he);
2132     }
2133     }
2134    
2135 root 1.288 /* fetch new monotonic and realtime times from the kernel */
2136     /* also detetc if there was a timejump, and act accordingly */
2137 root 1.284 inline_speed void
2138 root 1.178 time_update (EV_P_ ev_tstamp max_block)
2139 root 1.4 {
2140 root 1.40 #if EV_USE_MONOTONIC
2141     if (expect_true (have_monotonic))
2142     {
2143 root 1.289 int i;
2144 root 1.178 ev_tstamp odiff = rtmn_diff;
2145    
2146     mn_now = get_clock ();
2147    
2148     /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2149     /* interpolate in the meantime */
2150     if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2151 root 1.40 {
2152 root 1.178 ev_rt_now = rtmn_diff + mn_now;
2153     return;
2154     }
2155    
2156     now_floor = mn_now;
2157     ev_rt_now = ev_time ();
2158 root 1.4
2159 root 1.178 /* loop a few times, before making important decisions.
2160     * on the choice of "4": one iteration isn't enough,
2161     * in case we get preempted during the calls to
2162     * ev_time and get_clock. a second call is almost guaranteed
2163     * to succeed in that case, though. and looping a few more times
2164     * doesn't hurt either as we only do this on time-jumps or
2165     * in the unlikely event of having been preempted here.
2166     */
2167     for (i = 4; --i; )
2168     {
2169     rtmn_diff = ev_rt_now - mn_now;
2170 root 1.4
2171 root 1.234 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2172 root 1.178 return; /* all is well */
2173 root 1.4
2174 root 1.178 ev_rt_now = ev_time ();
2175     mn_now = get_clock ();
2176     now_floor = mn_now;
2177     }
2178 root 1.4
2179 root 1.285 /* no timer adjustment, as the monotonic clock doesn't jump */
2180     /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2181 root 1.140 # if EV_PERIODIC_ENABLE
2182 root 1.178 periodics_reschedule (EV_A);
2183 root 1.93 # endif
2184 root 1.4 }
2185     else
2186 root 1.40 #endif
2187 root 1.4 {
2188 root 1.85 ev_rt_now = ev_time ();
2189 root 1.40
2190 root 1.178 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2191 root 1.13 {
2192 root 1.285 /* adjust timers. this is easy, as the offset is the same for all of them */
2193     timers_reschedule (EV_A_ ev_rt_now - mn_now);
2194 root 1.140 #if EV_PERIODIC_ENABLE
2195 root 1.54 periodics_reschedule (EV_A);
2196 root 1.93 #endif
2197 root 1.13 }
2198 root 1.4
2199 root 1.85 mn_now = ev_rt_now;
2200 root 1.4 }
2201     }
2202    
2203 root 1.51 void
2204     ev_loop (EV_P_ int flags)
2205 root 1.1 {
2206 root 1.297 #if EV_MINIMAL < 2
2207 root 1.294 ++loop_depth;
2208 root 1.297 #endif
2209 root 1.294
2210 root 1.298 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2211    
2212 root 1.219 loop_done = EVUNLOOP_CANCEL;
2213 root 1.1
2214 root 1.297 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2215 root 1.158
2216 root 1.161 do
2217 root 1.9 {
2218 root 1.250 #if EV_VERIFY >= 2
2219     ev_loop_verify (EV_A);
2220     #endif
2221    
2222 root 1.158 #ifndef _WIN32
2223     if (expect_false (curpid)) /* penalise the forking check even more */
2224     if (expect_false (getpid () != curpid))
2225     {
2226     curpid = getpid ();
2227     postfork = 1;
2228     }
2229     #endif
2230    
2231 root 1.157 #if EV_FORK_ENABLE
2232     /* we might have forked, so queue fork handlers */
2233     if (expect_false (postfork))
2234     if (forkcnt)
2235     {
2236     queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2237 root 1.297 EV_INVOKE_PENDING;
2238 root 1.157 }
2239     #endif
2240 root 1.147
2241 root 1.170 /* queue prepare watchers (and execute them) */
2242 root 1.40 if (expect_false (preparecnt))
2243 root 1.20 {
2244 root 1.51 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2245 root 1.297 EV_INVOKE_PENDING;
2246 root 1.20 }
2247 root 1.9
2248 root 1.298 if (expect_false (loop_done))
2249     break;
2250    
2251 root 1.70 /* we might have forked, so reify kernel state if necessary */
2252     if (expect_false (postfork))
2253     loop_fork (EV_A);
2254    
2255 root 1.1 /* update fd-related kernel structures */
2256 root 1.51 fd_reify (EV_A);
2257 root 1.1
2258     /* calculate blocking time */
2259 root 1.135 {
2260 root 1.193 ev_tstamp waittime = 0.;
2261     ev_tstamp sleeptime = 0.;
2262 root 1.12
2263 root 1.193 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2264 root 1.135 {
2265 root 1.293 /* remember old timestamp for io_blocktime calculation */
2266     ev_tstamp prev_mn_now = mn_now;
2267    
2268 root 1.135 /* update time to cancel out callback processing overhead */
2269 root 1.178 time_update (EV_A_ 1e100);
2270 root 1.135
2271 root 1.287 waittime = MAX_BLOCKTIME;
2272    
2273 root 1.135 if (timercnt)
2274     {
2275 root 1.241 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2276 root 1.193 if (waittime > to) waittime = to;
2277 root 1.135 }
2278 root 1.4
2279 root 1.140 #if EV_PERIODIC_ENABLE
2280 root 1.135 if (periodiccnt)
2281     {
2282 root 1.241 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2283 root 1.193 if (waittime > to) waittime = to;
2284 root 1.135 }
2285 root 1.93 #endif
2286 root 1.4
2287 root 1.293 /* don't let timeouts decrease the waittime below timeout_blocktime */
2288 root 1.193 if (expect_false (waittime < timeout_blocktime))
2289     waittime = timeout_blocktime;
2290    
2291 root 1.293 /* extra check because io_blocktime is commonly 0 */
2292     if (expect_false (io_blocktime))
2293     {
2294     sleeptime = io_blocktime - (mn_now - prev_mn_now);
2295 root 1.193
2296 root 1.293 if (sleeptime > waittime - backend_fudge)
2297     sleeptime = waittime - backend_fudge;
2298 root 1.193
2299 root 1.293 if (expect_true (sleeptime > 0.))
2300     {
2301     ev_sleep (sleeptime);
2302     waittime -= sleeptime;
2303     }
2304 root 1.193 }
2305 root 1.135 }
2306 root 1.1
2307 root 1.297 #if EV_MINIMAL < 2
2308 root 1.162 ++loop_count;
2309 root 1.297 #endif
2310 root 1.298 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2311 root 1.193 backend_poll (EV_A_ waittime);
2312 root 1.298 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2313 root 1.178
2314     /* update ev_rt_now, do magic */
2315 root 1.193 time_update (EV_A_ waittime + sleeptime);
2316 root 1.135 }
2317 root 1.1
2318 root 1.9 /* queue pending timers and reschedule them */
2319 root 1.51 timers_reify (EV_A); /* relative timers called last */
2320 root 1.140 #if EV_PERIODIC_ENABLE
2321 root 1.51 periodics_reify (EV_A); /* absolute timers called first */
2322 root 1.93 #endif
2323 root 1.1
2324 root 1.164 #if EV_IDLE_ENABLE
2325 root 1.137 /* queue idle watchers unless other events are pending */
2326 root 1.164 idle_reify (EV_A);
2327     #endif
2328 root 1.9
2329 root 1.20 /* queue check watchers, to be executed first */
2330 root 1.123 if (expect_false (checkcnt))
2331 root 1.51 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2332 root 1.9
2333 root 1.297 EV_INVOKE_PENDING;
2334 root 1.1 }
2335 root 1.219 while (expect_true (
2336     activecnt
2337     && !loop_done
2338     && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2339     ));
2340 root 1.13
2341 root 1.135 if (loop_done == EVUNLOOP_ONE)
2342     loop_done = EVUNLOOP_CANCEL;
2343 root 1.294
2344 root 1.297 #if EV_MINIMAL < 2
2345 root 1.294 --loop_depth;
2346 root 1.297 #endif
2347 root 1.51 }
2348    
2349     void
2350     ev_unloop (EV_P_ int how)
2351     {
2352     loop_done = how;
2353 root 1.1 }
2354    
2355 root 1.285 void
2356     ev_ref (EV_P)
2357     {
2358     ++activecnt;
2359     }
2360    
2361     void
2362     ev_unref (EV_P)
2363     {
2364     --activecnt;
2365     }
2366    
2367     void
2368     ev_now_update (EV_P)
2369     {
2370     time_update (EV_A_ 1e100);
2371     }
2372    
2373     void
2374     ev_suspend (EV_P)
2375     {
2376     ev_now_update (EV_A);
2377     }
2378    
2379     void
2380     ev_resume (EV_P)
2381     {
2382     ev_tstamp mn_prev = mn_now;
2383    
2384     ev_now_update (EV_A);
2385     timers_reschedule (EV_A_ mn_now - mn_prev);
2386 root 1.286 #if EV_PERIODIC_ENABLE
2387 root 1.288 /* TODO: really do this? */
2388 root 1.285 periodics_reschedule (EV_A);
2389 root 1.286 #endif
2390 root 1.285 }
2391    
2392 root 1.8 /*****************************************************************************/
2393 root 1.288 /* singly-linked list management, used when the expected list length is short */
2394 root 1.8
2395 root 1.284 inline_size void
2396 root 1.10 wlist_add (WL *head, WL elem)
2397 root 1.1 {
2398     elem->next = *head;
2399     *head = elem;
2400     }
2401    
2402 root 1.284 inline_size void
2403 root 1.10 wlist_del (WL *head, WL elem)
2404 root 1.1 {
2405     while (*head)
2406     {
2407 root 1.307 if (expect_true (*head == elem))
2408 root 1.1 {
2409     *head = elem->next;
2410 root 1.307 break;
2411 root 1.1 }
2412    
2413     head = &(*head)->next;
2414     }
2415     }
2416    
2417 root 1.288 /* internal, faster, version of ev_clear_pending */
2418 root 1.284 inline_speed void
2419 root 1.166 clear_pending (EV_P_ W w)
2420 root 1.16 {
2421     if (w->pending)
2422     {
2423 root 1.288 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2424 root 1.16 w->pending = 0;
2425     }
2426     }
2427    
2428 root 1.167 int
2429     ev_clear_pending (EV_P_ void *w)
2430 root 1.166 {
2431     W w_ = (W)w;
2432     int pending = w_->pending;
2433    
2434 root 1.172 if (expect_true (pending))
2435     {
2436     ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2437 root 1.288 p->w = (W)&pending_w;
2438 root 1.172 w_->pending = 0;
2439     return p->events;
2440     }
2441     else
2442 root 1.167 return 0;
2443 root 1.166 }
2444    
2445 root 1.284 inline_size void
2446 root 1.164 pri_adjust (EV_P_ W w)
2447     {
2448 root 1.295 int pri = ev_priority (w);
2449 root 1.164 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2450     pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2451 root 1.295 ev_set_priority (w, pri);
2452 root 1.164 }
2453    
2454 root 1.284 inline_speed void
2455 root 1.51 ev_start (EV_P_ W w, int active)
2456 root 1.1 {
2457 root 1.164 pri_adjust (EV_A_ w);
2458 root 1.1 w->active = active;
2459 root 1.51 ev_ref (EV_A);
2460 root 1.1 }
2461    
2462 root 1.284 inline_size void
2463 root 1.51 ev_stop (EV_P_ W w)
2464 root 1.1 {
2465 root 1.51 ev_unref (EV_A);
2466 root 1.1 w->active = 0;
2467     }
2468    
2469 root 1.8 /*****************************************************************************/
2470    
2471 root 1.171 void noinline
2472 root 1.136 ev_io_start (EV_P_ ev_io *w)
2473 root 1.1 {
2474 root 1.37 int fd = w->fd;
2475    
2476 root 1.123 if (expect_false (ev_is_active (w)))
2477 root 1.1 return;
2478    
2479 root 1.278 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2480 root 1.281 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2481 root 1.33
2482 root 1.248 EV_FREQUENT_CHECK;
2483    
2484 root 1.51 ev_start (EV_A_ (W)w, 1);
2485 root 1.265 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2486 root 1.182 wlist_add (&anfds[fd].head, (WL)w);
2487 root 1.1
2488 root 1.298 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2489 root 1.281 w->events &= ~EV__IOFDSET;
2490 root 1.248
2491     EV_FREQUENT_CHECK;
2492 root 1.1 }
2493    
2494 root 1.171 void noinline
2495 root 1.136 ev_io_stop (EV_P_ ev_io *w)
2496 root 1.1 {
2497 root 1.166 clear_pending (EV_A_ (W)w);
2498 root 1.123 if (expect_false (!ev_is_active (w)))
2499 root 1.1 return;
2500    
2501 root 1.278 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2502 root 1.89
2503 root 1.248 EV_FREQUENT_CHECK;
2504    
2505 root 1.182 wlist_del (&anfds[w->fd].head, (WL)w);
2506 root 1.51 ev_stop (EV_A_ (W)w);
2507 root 1.1
2508 root 1.184 fd_change (EV_A_ w->fd, 1);
2509 root 1.248
2510     EV_FREQUENT_CHECK;
2511 root 1.1 }
2512    
2513 root 1.171 void noinline
2514 root 1.136 ev_timer_start (EV_P_ ev_timer *w)
2515 root 1.1 {
2516 root 1.123 if (expect_false (ev_is_active (w)))
2517 root 1.1 return;
2518    
2519 root 1.228 ev_at (w) += mn_now;
2520 root 1.12
2521 root 1.278 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2522 root 1.13
2523 root 1.248 EV_FREQUENT_CHECK;
2524    
2525     ++timercnt;
2526     ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2527 root 1.241 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2528     ANHE_w (timers [ev_active (w)]) = (WT)w;
2529 root 1.248 ANHE_at_cache (timers [ev_active (w)]);
2530 root 1.235 upheap (timers, ev_active (w));
2531 root 1.62
2532 root 1.248 EV_FREQUENT_CHECK;
2533    
2534 root 1.278 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2535 root 1.12 }
2536    
2537 root 1.171 void noinline
2538 root 1.136 ev_timer_stop (EV_P_ ev_timer *w)
2539 root 1.12 {
2540 root 1.166 clear_pending (EV_A_ (W)w);
2541 root 1.123 if (expect_false (!ev_is_active (w)))
2542 root 1.12 return;
2543    
2544 root 1.248 EV_FREQUENT_CHECK;
2545    
2546 root 1.230 {
2547     int active = ev_active (w);
2548 root 1.62
2549 root 1.278 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2550 root 1.151
2551 root 1.248 --timercnt;
2552    
2553     if (expect_true (active < timercnt + HEAP0))
2554 root 1.151 {
2555 root 1.248 timers [active] = timers [timercnt + HEAP0];
2556 root 1.181 adjustheap (timers, timercnt, active);
2557 root 1.151 }
2558 root 1.248 }
2559 root 1.228
2560 root 1.248 EV_FREQUENT_CHECK;
2561 root 1.4
2562 root 1.228 ev_at (w) -= mn_now;
2563 root 1.14
2564 root 1.51 ev_stop (EV_A_ (W)w);
2565 root 1.12 }
2566 root 1.4
2567 root 1.171 void noinline
2568 root 1.136 ev_timer_again (EV_P_ ev_timer *w)
2569 root 1.14 {
2570 root 1.248 EV_FREQUENT_CHECK;
2571    
2572 root 1.14 if (ev_is_active (w))
2573     {
2574     if (w->repeat)
2575 root 1.99 {
2576 root 1.228 ev_at (w) = mn_now + w->repeat;
2577 root 1.248 ANHE_at_cache (timers [ev_active (w)]);
2578 root 1.230 adjustheap (timers, timercnt, ev_active (w));
2579 root 1.99 }
2580 root 1.14 else
2581 root 1.51 ev_timer_stop (EV_A_ w);
2582 root 1.14 }
2583     else if (w->repeat)
2584 root 1.112 {
2585 root 1.229 ev_at (w) = w->repeat;
2586 root 1.112 ev_timer_start (EV_A_ w);
2587     }
2588 root 1.248
2589     EV_FREQUENT_CHECK;
2590 root 1.14 }
2591    
2592 root 1.301 ev_tstamp
2593     ev_timer_remaining (EV_P_ ev_timer *w)
2594     {
2595     return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2596     }
2597    
2598 root 1.140 #if EV_PERIODIC_ENABLE
2599 root 1.171 void noinline
2600 root 1.136 ev_periodic_start (EV_P_ ev_periodic *w)
2601 root 1.12 {
2602 root 1.123 if (expect_false (ev_is_active (w)))
2603 root 1.12 return;
2604 root 1.1
2605 root 1.77 if (w->reschedule_cb)
2606 root 1.228 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2607 root 1.77 else if (w->interval)
2608     {
2609 root 1.278 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2610 root 1.77 /* this formula differs from the one in periodic_reify because we do not always round up */
2611 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2612 root 1.77 }
2613 root 1.173 else
2614 root 1.228 ev_at (w) = w->offset;
2615 root 1.12
2616 root 1.248 EV_FREQUENT_CHECK;
2617    
2618     ++periodiccnt;
2619     ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2620 root 1.241 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2621     ANHE_w (periodics [ev_active (w)]) = (WT)w;
2622 root 1.248 ANHE_at_cache (periodics [ev_active (w)]);
2623 root 1.235 upheap (periodics, ev_active (w));
2624 root 1.62
2625 root 1.248 EV_FREQUENT_CHECK;
2626    
2627 root 1.278 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2628 root 1.1 }
2629    
2630 root 1.171 void noinline
2631 root 1.136 ev_periodic_stop (EV_P_ ev_periodic *w)
2632 root 1.1 {
2633 root 1.166 clear_pending (EV_A_ (W)w);
2634 root 1.123 if (expect_false (!ev_is_active (w)))
2635 root 1.1 return;
2636    
2637 root 1.248 EV_FREQUENT_CHECK;
2638    
2639 root 1.230 {
2640     int active = ev_active (w);
2641 root 1.62
2642 root 1.278 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2643 root 1.151
2644 root 1.248 --periodiccnt;
2645    
2646     if (expect_true (active < periodiccnt + HEAP0))
2647 root 1.151 {
2648 root 1.248 periodics [active] = periodics [periodiccnt + HEAP0];
2649 root 1.181 adjustheap (periodics, periodiccnt, active);
2650 root 1.151 }
2651 root 1.248 }
2652 root 1.228
2653 root 1.248 EV_FREQUENT_CHECK;
2654 root 1.2
2655 root 1.51 ev_stop (EV_A_ (W)w);
2656 root 1.1 }
2657    
2658 root 1.171 void noinline
2659 root 1.136 ev_periodic_again (EV_P_ ev_periodic *w)
2660 root 1.77 {
2661 root 1.84 /* TODO: use adjustheap and recalculation */
2662 root 1.77 ev_periodic_stop (EV_A_ w);
2663     ev_periodic_start (EV_A_ w);
2664     }
2665 root 1.93 #endif
2666 root 1.77
2667 root 1.56 #ifndef SA_RESTART
2668     # define SA_RESTART 0
2669     #endif
2670    
2671 root 1.171 void noinline
2672 root 1.136 ev_signal_start (EV_P_ ev_signal *w)
2673 root 1.56 {
2674 root 1.123 if (expect_false (ev_is_active (w)))
2675 root 1.56 return;
2676    
2677 root 1.306 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2678    
2679     #if EV_MULTIPLICITY
2680 root 1.308 assert (("libev: a signal must not be attached to two different loops",
2681 root 1.306 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2682    
2683     signals [w->signum - 1].loop = EV_A;
2684     #endif
2685 root 1.56
2686 root 1.303 EV_FREQUENT_CHECK;
2687    
2688     #if EV_USE_SIGNALFD
2689     if (sigfd == -2)
2690     {
2691     sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2692     if (sigfd < 0 && errno == EINVAL)
2693     sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2694    
2695     if (sigfd >= 0)
2696     {
2697     fd_intern (sigfd); /* doing it twice will not hurt */
2698    
2699     sigemptyset (&sigfd_set);
2700    
2701     ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2702     ev_set_priority (&sigfd_w, EV_MAXPRI);
2703     ev_io_start (EV_A_ &sigfd_w);
2704     ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2705     }
2706     }
2707    
2708     if (sigfd >= 0)
2709     {
2710     /* TODO: check .head */
2711     sigaddset (&sigfd_set, w->signum);
2712     sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2713 root 1.207
2714 root 1.303 signalfd (sigfd, &sigfd_set, 0);
2715     }
2716 root 1.180 #endif
2717    
2718 root 1.56 ev_start (EV_A_ (W)w, 1);
2719 root 1.182 wlist_add (&signals [w->signum - 1].head, (WL)w);
2720 root 1.56
2721 root 1.63 if (!((WL)w)->next)
2722 root 1.304 # if EV_USE_SIGNALFD
2723 root 1.306 if (sigfd < 0) /*TODO*/
2724 root 1.304 # endif
2725 root 1.306 {
2726     # if _WIN32
2727     signal (w->signum, ev_sighandler);
2728     # else
2729     struct sigaction sa;
2730    
2731     evpipe_init (EV_A);
2732    
2733     sa.sa_handler = ev_sighandler;
2734     sigfillset (&sa.sa_mask);
2735     sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2736     sigaction (w->signum, &sa, 0);
2737    
2738     sigemptyset (&sa.sa_mask);
2739     sigaddset (&sa.sa_mask, w->signum);
2740     sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2741 root 1.67 #endif
2742 root 1.306 }
2743 root 1.248
2744     EV_FREQUENT_CHECK;
2745 root 1.56 }
2746    
2747 root 1.171 void noinline
2748 root 1.136 ev_signal_stop (EV_P_ ev_signal *w)
2749 root 1.56 {
2750 root 1.166 clear_pending (EV_A_ (W)w);
2751 root 1.123 if (expect_false (!ev_is_active (w)))
2752 root 1.56 return;
2753    
2754 root 1.248 EV_FREQUENT_CHECK;
2755    
2756 root 1.182 wlist_del (&signals [w->signum - 1].head, (WL)w);
2757 root 1.56 ev_stop (EV_A_ (W)w);
2758    
2759     if (!signals [w->signum - 1].head)
2760 root 1.306 {
2761 root 1.307 #if EV_MULTIPLICITY
2762 root 1.306 signals [w->signum - 1].loop = 0; /* unattach from signal */
2763 root 1.307 #endif
2764     #if EV_USE_SIGNALFD
2765 root 1.306 if (sigfd >= 0)
2766     {
2767     sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2768     sigdelset (&sigfd_set, w->signum);
2769     signalfd (sigfd, &sigfd_set, 0);
2770     sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2771     /*TODO: maybe unblock signal? */
2772     }
2773     else
2774 root 1.307 #endif
2775 root 1.306 signal (w->signum, SIG_DFL);
2776     }
2777 root 1.248
2778     EV_FREQUENT_CHECK;
2779 root 1.56 }
2780    
2781 root 1.28 void
2782 root 1.136 ev_child_start (EV_P_ ev_child *w)
2783 root 1.22 {
2784 root 1.56 #if EV_MULTIPLICITY
2785 root 1.278 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2786 root 1.56 #endif
2787 root 1.123 if (expect_false (ev_is_active (w)))
2788 root 1.22 return;
2789    
2790 root 1.248 EV_FREQUENT_CHECK;
2791    
2792 root 1.51 ev_start (EV_A_ (W)w, 1);
2793 root 1.182 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2794 root 1.248
2795     EV_FREQUENT_CHECK;
2796 root 1.22 }
2797    
2798 root 1.28 void
2799 root 1.136 ev_child_stop (EV_P_ ev_child *w)
2800 root 1.22 {
2801 root 1.166 clear_pending (EV_A_ (W)w);
2802 root 1.123 if (expect_false (!ev_is_active (w)))
2803 root 1.22 return;
2804    
2805 root 1.248 EV_FREQUENT_CHECK;
2806    
2807 root 1.182 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2808 root 1.51 ev_stop (EV_A_ (W)w);
2809 root 1.248
2810     EV_FREQUENT_CHECK;
2811 root 1.22 }
2812    
2813 root 1.140 #if EV_STAT_ENABLE
2814    
2815     # ifdef _WIN32
2816 root 1.146 # undef lstat
2817     # define lstat(a,b) _stati64 (a,b)
2818 root 1.140 # endif
2819    
2820 root 1.273 #define DEF_STAT_INTERVAL 5.0074891
2821     #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2822     #define MIN_STAT_INTERVAL 0.1074891
2823 root 1.143
2824 root 1.157 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2825 root 1.152
2826     #if EV_USE_INOTIFY
2827 root 1.153 # define EV_INOTIFY_BUFSIZE 8192
2828 root 1.152
2829     static void noinline
2830     infy_add (EV_P_ ev_stat *w)
2831     {
2832     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);
2833    
2834     if (w->wd < 0)
2835     {
2836 root 1.273 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2837     ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2838 root 1.152
2839     /* monitor some parent directory for speedup hints */
2840 root 1.271 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2841 root 1.233 /* but an efficiency issue only */
2842 root 1.153 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2843 root 1.152 {
2844 root 1.153 char path [4096];
2845 root 1.152 strcpy (path, w->path);
2846    
2847     do
2848     {
2849     int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2850     | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2851    
2852     char *pend = strrchr (path, '/');
2853    
2854 root 1.275 if (!pend || pend == path)
2855     break;
2856 root 1.152
2857     *pend = 0;
2858 root 1.153 w->wd = inotify_add_watch (fs_fd, path, mask);
2859 root 1.152 }
2860     while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2861     }
2862     }
2863 root 1.275
2864     if (w->wd >= 0)
2865 root 1.273 {
2866     wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2867    
2868     /* now local changes will be tracked by inotify, but remote changes won't */
2869     /* unless the filesystem it known to be local, we therefore still poll */
2870     /* also do poll on <2.6.25, but with normal frequency */
2871     struct statfs sfs;
2872    
2873     if (fs_2625 && !statfs (w->path, &sfs))
2874     if (sfs.f_type == 0x1373 /* devfs */
2875     || sfs.f_type == 0xEF53 /* ext2/3 */
2876     || sfs.f_type == 0x3153464a /* jfs */
2877     || sfs.f_type == 0x52654973 /* reiser3 */
2878     || sfs.f_type == 0x01021994 /* tempfs */
2879     || sfs.f_type == 0x58465342 /* xfs */)
2880     return;
2881 root 1.152
2882 root 1.273 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2883     ev_timer_again (EV_A_ &w->timer);
2884     }
2885 root 1.152 }
2886    
2887     static void noinline
2888     infy_del (EV_P_ ev_stat *w)
2889     {
2890     int slot;
2891     int wd = w->wd;
2892    
2893     if (wd < 0)
2894     return;
2895    
2896     w->wd = -2;
2897     slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2898     wlist_del (&fs_hash [slot].head, (WL)w);
2899    
2900     /* remove this watcher, if others are watching it, they will rearm */
2901     inotify_rm_watch (fs_fd, wd);
2902     }
2903    
2904     static void noinline
2905     infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2906     {
2907     if (slot < 0)
2908 root 1.264 /* overflow, need to check for all hash slots */
2909 root 1.152 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2910     infy_wd (EV_A_ slot, wd, ev);
2911     else
2912     {
2913     WL w_;
2914    
2915     for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2916     {
2917     ev_stat *w = (ev_stat *)w_;
2918     w_ = w_->next; /* lets us remove this watcher and all before it */
2919    
2920     if (w->wd == wd || wd == -1)
2921     {
2922     if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2923     {
2924 root 1.275 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2925 root 1.152 w->wd = -1;
2926     infy_add (EV_A_ w); /* re-add, no matter what */
2927     }
2928    
2929 root 1.153 stat_timer_cb (EV_A_ &w->timer, 0);
2930 root 1.152 }
2931     }
2932     }
2933     }
2934    
2935     static void
2936     infy_cb (EV_P_ ev_io *w, int revents)
2937     {
2938     char buf [EV_INOTIFY_BUFSIZE];
2939     struct inotify_event *ev = (struct inotify_event *)buf;
2940     int ofs;
2941     int len = read (fs_fd, buf, sizeof (buf));
2942    
2943     for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2944     infy_wd (EV_A_ ev->wd, ev->wd, ev);
2945     }
2946    
2947 root 1.284 inline_size void
2948 root 1.273 check_2625 (EV_P)
2949 root 1.152 {
2950 root 1.264 /* kernels < 2.6.25 are borked
2951     * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2952     */
2953 root 1.273 struct utsname buf;
2954     int major, minor, micro;
2955    
2956     if (uname (&buf))
2957     return;
2958    
2959     if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2960     return;
2961    
2962     if (major < 2
2963     || (major == 2 && minor < 6)
2964     || (major == 2 && minor == 6 && micro < 25))
2965     return;
2966 root 1.264
2967 root 1.273 fs_2625 = 1;
2968     }
2969 root 1.264
2970 root 1.284 inline_size void
2971 root 1.273 infy_init (EV_P)
2972     {
2973     if (fs_fd != -2)
2974     return;
2975 root 1.264
2976 root 1.273 fs_fd = -1;
2977 root 1.264
2978 root 1.273 check_2625 (EV_A);
2979 root 1.264
2980 root 1.152 fs_fd = inotify_init ();
2981    
2982     if (fs_fd >= 0)
2983     {
2984     ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2985     ev_set_priority (&fs_w, EV_MAXPRI);
2986     ev_io_start (EV_A_ &fs_w);
2987     }
2988     }
2989    
2990 root 1.284 inline_size void
2991 root 1.154 infy_fork (EV_P)
2992     {
2993     int slot;
2994    
2995     if (fs_fd < 0)
2996     return;
2997    
2998     close (fs_fd);
2999     fs_fd = inotify_init ();
3000    
3001     for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3002     {
3003     WL w_ = fs_hash [slot].head;
3004     fs_hash [slot].head = 0;
3005    
3006     while (w_)
3007     {
3008     ev_stat *w = (ev_stat *)w_;
3009     w_ = w_->next; /* lets us add this watcher */
3010    
3011     w->wd = -1;
3012    
3013     if (fs_fd >= 0)
3014     infy_add (EV_A_ w); /* re-add, no matter what */
3015     else
3016 root 1.273 ev_timer_again (EV_A_ &w->timer);
3017 root 1.154 }
3018     }
3019     }
3020    
3021 root 1.152 #endif
3022    
3023 root 1.255 #ifdef _WIN32
3024     # define EV_LSTAT(p,b) _stati64 (p, b)
3025     #else
3026     # define EV_LSTAT(p,b) lstat (p, b)
3027     #endif
3028    
3029 root 1.140 void
3030     ev_stat_stat (EV_P_ ev_stat *w)
3031     {
3032     if (lstat (w->path, &w->attr) < 0)
3033     w->attr.st_nlink = 0;
3034     else if (!w->attr.st_nlink)
3035     w->attr.st_nlink = 1;
3036     }
3037    
3038 root 1.157 static void noinline
3039 root 1.140 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3040     {
3041     ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3042    
3043     /* we copy this here each the time so that */
3044     /* prev has the old value when the callback gets invoked */
3045     w->prev = w->attr;
3046     ev_stat_stat (EV_A_ w);
3047    
3048 root 1.156 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3049     if (
3050     w->prev.st_dev != w->attr.st_dev
3051     || w->prev.st_ino != w->attr.st_ino
3052     || w->prev.st_mode != w->attr.st_mode
3053     || w->prev.st_nlink != w->attr.st_nlink
3054     || w->prev.st_uid != w->attr.st_uid
3055     || w->prev.st_gid != w->attr.st_gid
3056     || w->prev.st_rdev != w->attr.st_rdev
3057     || w->prev.st_size != w->attr.st_size
3058     || w->prev.st_atime != w->attr.st_atime
3059     || w->prev.st_mtime != w->attr.st_mtime
3060     || w->prev.st_ctime != w->attr.st_ctime
3061     ) {
3062 root 1.152 #if EV_USE_INOTIFY
3063 root 1.264 if (fs_fd >= 0)
3064     {
3065     infy_del (EV_A_ w);
3066     infy_add (EV_A_ w);
3067     ev_stat_stat (EV_A_ w); /* avoid race... */
3068     }
3069 root 1.152 #endif
3070    
3071     ev_feed_event (EV_A_ w, EV_STAT);
3072     }
3073 root 1.140 }
3074    
3075     void
3076     ev_stat_start (EV_P_ ev_stat *w)
3077     {
3078     if (expect_false (ev_is_active (w)))
3079     return;
3080    
3081     ev_stat_stat (EV_A_ w);
3082    
3083 root 1.273 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3084     w->interval = MIN_STAT_INTERVAL;
3085 root 1.143
3086 root 1.273 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3087 root 1.140 ev_set_priority (&w->timer, ev_priority (w));
3088 root 1.152
3089     #if EV_USE_INOTIFY
3090     infy_init (EV_A);
3091    
3092     if (fs_fd >= 0)
3093     infy_add (EV_A_ w);
3094     else
3095     #endif
3096 root 1.273 ev_timer_again (EV_A_ &w->timer);
3097 root 1.140
3098     ev_start (EV_A_ (W)w, 1);
3099 root 1.248
3100     EV_FREQUENT_CHECK;
3101 root 1.140 }
3102    
3103     void
3104     ev_stat_stop (EV_P_ ev_stat *w)
3105     {
3106 root 1.166 clear_pending (EV_A_ (W)w);
3107 root 1.140 if (expect_false (!ev_is_active (w)))
3108     return;
3109    
3110 root 1.248 EV_FREQUENT_CHECK;
3111    
3112 root 1.152 #if EV_USE_INOTIFY
3113     infy_del (EV_A_ w);
3114     #endif
3115 root 1.140 ev_timer_stop (EV_A_ &w->timer);
3116    
3117 root 1.134 ev_stop (EV_A_ (W)w);
3118 root 1.248
3119     EV_FREQUENT_CHECK;
3120 root 1.134 }
3121     #endif
3122    
3123 root 1.164 #if EV_IDLE_ENABLE
3124 root 1.144 void
3125     ev_idle_start (EV_P_ ev_idle *w)
3126     {
3127     if (expect_false (ev_is_active (w)))
3128     return;
3129    
3130 root 1.164 pri_adjust (EV_A_ (W)w);
3131    
3132 root 1.248 EV_FREQUENT_CHECK;
3133    
3134 root 1.164 {
3135     int active = ++idlecnt [ABSPRI (w)];
3136    
3137     ++idleall;
3138     ev_start (EV_A_ (W)w, active);
3139    
3140     array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3141     idles [ABSPRI (w)][active - 1] = w;
3142     }
3143 root 1.248
3144     EV_FREQUENT_CHECK;
3145 root 1.144 }
3146    
3147     void
3148     ev_idle_stop (EV_P_ ev_idle *w)
3149     {
3150 root 1.166 clear_pending (EV_A_ (W)w);
3151 root 1.144 if (expect_false (!ev_is_active (w)))
3152     return;
3153    
3154 root 1.248 EV_FREQUENT_CHECK;
3155    
3156 root 1.144 {
3157 root 1.230 int active = ev_active (w);
3158 root 1.164
3159     idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3160 root 1.230 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3161 root 1.164
3162     ev_stop (EV_A_ (W)w);
3163     --idleall;
3164 root 1.144 }
3165 root 1.248
3166     EV_FREQUENT_CHECK;
3167 root 1.144 }
3168 root 1.164 #endif
3169 root 1.144
3170     void
3171     ev_prepare_start (EV_P_ ev_prepare *w)
3172     {
3173     if (expect_false (ev_is_active (w)))
3174     return;
3175    
3176 root 1.248 EV_FREQUENT_CHECK;
3177    
3178 root 1.144 ev_start (EV_A_ (W)w, ++preparecnt);
3179     array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3180     prepares [preparecnt - 1] = w;
3181 root 1.248
3182     EV_FREQUENT_CHECK;
3183 root 1.144 }
3184    
3185     void
3186     ev_prepare_stop (EV_P_ ev_prepare *w)
3187     {
3188 root 1.166 clear_pending (EV_A_ (W)w);
3189 root 1.144 if (expect_false (!ev_is_active (w)))
3190     return;
3191    
3192 root 1.248 EV_FREQUENT_CHECK;
3193    
3194 root 1.144 {
3195 root 1.230 int active = ev_active (w);
3196    
3197 root 1.144 prepares [active - 1] = prepares [--preparecnt];
3198 root 1.230 ev_active (prepares [active - 1]) = active;
3199 root 1.144 }
3200    
3201     ev_stop (EV_A_ (W)w);
3202 root 1.248
3203     EV_FREQUENT_CHECK;
3204 root 1.144 }
3205    
3206     void
3207     ev_check_start (EV_P_ ev_check *w)
3208     {
3209     if (expect_false (ev_is_active (w)))
3210     return;
3211    
3212 root 1.248 EV_FREQUENT_CHECK;
3213    
3214 root 1.144 ev_start (EV_A_ (W)w, ++checkcnt);
3215     array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3216     checks [checkcnt - 1] = w;
3217 root 1.248
3218     EV_FREQUENT_CHECK;
3219 root 1.144 }
3220    
3221     void
3222     ev_check_stop (EV_P_ ev_check *w)
3223     {
3224 root 1.166 clear_pending (EV_A_ (W)w);
3225 root 1.144 if (expect_false (!ev_is_active (w)))
3226     return;
3227    
3228 root 1.248 EV_FREQUENT_CHECK;
3229    
3230 root 1.144 {
3231 root 1.230 int active = ev_active (w);
3232    
3233 root 1.144 checks [active - 1] = checks [--checkcnt];
3234 root 1.230 ev_active (checks [active - 1]) = active;
3235 root 1.144 }
3236    
3237     ev_stop (EV_A_ (W)w);
3238 root 1.248
3239     EV_FREQUENT_CHECK;
3240 root 1.144 }
3241    
3242     #if EV_EMBED_ENABLE
3243     void noinline
3244     ev_embed_sweep (EV_P_ ev_embed *w)
3245     {
3246 root 1.188 ev_loop (w->other, EVLOOP_NONBLOCK);
3247 root 1.144 }
3248    
3249     static void
3250 root 1.189 embed_io_cb (EV_P_ ev_io *io, int revents)
3251 root 1.144 {
3252     ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3253    
3254     if (ev_cb (w))
3255     ev_feed_event (EV_A_ (W)w, EV_EMBED);
3256     else
3257 root 1.195 ev_loop (w->other, EVLOOP_NONBLOCK);
3258 root 1.144 }
3259    
3260 root 1.189 static void
3261     embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3262     {
3263     ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3264    
3265 root 1.195 {
3266 root 1.306 EV_P = w->other;
3267 root 1.195
3268     while (fdchangecnt)
3269     {
3270     fd_reify (EV_A);
3271     ev_loop (EV_A_ EVLOOP_NONBLOCK);
3272     }
3273     }
3274     }
3275    
3276 root 1.261 static void
3277     embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3278     {
3279     ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3280    
3281 root 1.277 ev_embed_stop (EV_A_ w);
3282    
3283 root 1.261 {
3284 root 1.306 EV_P = w->other;
3285 root 1.261
3286     ev_loop_fork (EV_A);
3287 root 1.277 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3288 root 1.261 }
3289 root 1.277
3290     ev_embed_start (EV_A_ w);
3291 root 1.261 }
3292    
3293 root 1.195 #if 0
3294     static void
3295     embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3296     {
3297     ev_idle_stop (EV_A_ idle);
3298 root 1.189 }
3299 root 1.195 #endif
3300 root 1.189
3301 root 1.144 void
3302     ev_embed_start (EV_P_ ev_embed *w)
3303     {
3304     if (expect_false (ev_is_active (w)))
3305     return;
3306    
3307     {
3308 root 1.306 EV_P = w->other;
3309 root 1.278 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3310 root 1.191 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3311 root 1.144 }
3312    
3313 root 1.248 EV_FREQUENT_CHECK;
3314    
3315 root 1.144 ev_set_priority (&w->io, ev_priority (w));
3316     ev_io_start (EV_A_ &w->io);
3317    
3318 root 1.189 ev_prepare_init (&w->prepare, embed_prepare_cb);
3319     ev_set_priority (&w->prepare, EV_MINPRI);
3320     ev_prepare_start (EV_A_ &w->prepare);
3321    
3322 root 1.261 ev_fork_init (&w->fork, embed_fork_cb);
3323     ev_fork_start (EV_A_ &w->fork);
3324    
3325 root 1.195 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3326    
3327 root 1.144 ev_start (EV_A_ (W)w, 1);
3328 root 1.248
3329     EV_FREQUENT_CHECK;
3330 root 1.144 }
3331    
3332     void
3333     ev_embed_stop (EV_P_ ev_embed *w)
3334     {
3335 root 1.166 clear_pending (EV_A_ (W)w);
3336 root 1.144 if (expect_false (!ev_is_active (w)))
3337     return;
3338    
3339 root 1.248 EV_FREQUENT_CHECK;
3340    
3341 root 1.261 ev_io_stop (EV_A_ &w->io);
3342 root 1.189 ev_prepare_stop (EV_A_ &w->prepare);
3343 root 1.261 ev_fork_stop (EV_A_ &w->fork);
3344 root 1.248
3345     EV_FREQUENT_CHECK;
3346 root 1.144 }
3347     #endif
3348    
3349 root 1.147 #if EV_FORK_ENABLE
3350     void
3351     ev_fork_start (EV_P_ ev_fork *w)
3352     {
3353     if (expect_false (ev_is_active (w)))
3354     return;
3355    
3356 root 1.248 EV_FREQUENT_CHECK;
3357    
3358 root 1.147 ev_start (EV_A_ (W)w, ++forkcnt);
3359     array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3360     forks [forkcnt - 1] = w;
3361 root 1.248
3362     EV_FREQUENT_CHECK;
3363 root 1.147 }
3364    
3365     void
3366     ev_fork_stop (EV_P_ ev_fork *w)
3367     {
3368 root 1.166 clear_pending (EV_A_ (W)w);
3369 root 1.147 if (expect_false (!ev_is_active (w)))
3370     return;
3371    
3372 root 1.248 EV_FREQUENT_CHECK;
3373    
3374 root 1.147 {
3375 root 1.230 int active = ev_active (w);
3376    
3377 root 1.147 forks [active - 1] = forks [--forkcnt];
3378 root 1.230 ev_active (forks [active - 1]) = active;
3379 root 1.147 }
3380    
3381     ev_stop (EV_A_ (W)w);
3382 root 1.248
3383     EV_FREQUENT_CHECK;
3384 root 1.147 }
3385     #endif
3386    
3387 root 1.207 #if EV_ASYNC_ENABLE
3388     void
3389     ev_async_start (EV_P_ ev_async *w)
3390     {
3391     if (expect_false (ev_is_active (w)))
3392     return;
3393    
3394     evpipe_init (EV_A);
3395    
3396 root 1.248 EV_FREQUENT_CHECK;
3397    
3398 root 1.207 ev_start (EV_A_ (W)w, ++asynccnt);
3399     array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3400     asyncs [asynccnt - 1] = w;
3401 root 1.248
3402     EV_FREQUENT_CHECK;
3403 root 1.207 }
3404    
3405     void
3406     ev_async_stop (EV_P_ ev_async *w)
3407     {
3408     clear_pending (EV_A_ (W)w);
3409     if (expect_false (!ev_is_active (w)))
3410     return;
3411    
3412 root 1.248 EV_FREQUENT_CHECK;
3413    
3414 root 1.207 {
3415 root 1.230 int active = ev_active (w);
3416    
3417 root 1.207 asyncs [active - 1] = asyncs [--asynccnt];
3418 root 1.230 ev_active (asyncs [active - 1]) = active;
3419 root 1.207 }
3420    
3421     ev_stop (EV_A_ (W)w);
3422 root 1.248
3423     EV_FREQUENT_CHECK;
3424 root 1.207 }
3425    
3426     void
3427     ev_async_send (EV_P_ ev_async *w)
3428     {
3429     w->sent = 1;
3430 root 1.307 evpipe_write (EV_A_ &async_pending);
3431 root 1.207 }
3432     #endif
3433    
3434 root 1.1 /*****************************************************************************/
3435 root 1.10
3436 root 1.16 struct ev_once
3437     {
3438 root 1.136 ev_io io;
3439     ev_timer to;
3440 root 1.16 void (*cb)(int revents, void *arg);
3441     void *arg;
3442     };
3443    
3444     static void
3445 root 1.51 once_cb (EV_P_ struct ev_once *once, int revents)
3446 root 1.16 {
3447     void (*cb)(int revents, void *arg) = once->cb;
3448     void *arg = once->arg;
3449    
3450 root 1.259 ev_io_stop (EV_A_ &once->io);
3451 root 1.51 ev_timer_stop (EV_A_ &once->to);
3452 root 1.69 ev_free (once);
3453 root 1.16
3454     cb (revents, arg);
3455     }
3456    
3457     static void
3458 root 1.136 once_cb_io (EV_P_ ev_io *w, int revents)
3459 root 1.16 {
3460 root 1.262 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3461    
3462     once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3463 root 1.16 }
3464    
3465     static void
3466 root 1.136 once_cb_to (EV_P_ ev_timer *w, int revents)
3467 root 1.16 {
3468 root 1.262 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3469    
3470     once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3471 root 1.16 }
3472    
3473     void
3474 root 1.51 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3475 root 1.16 {
3476 root 1.74 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3477 root 1.16
3478 root 1.123 if (expect_false (!once))
3479 root 1.16 {
3480 root 1.123 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3481     return;
3482     }
3483    
3484     once->cb = cb;
3485     once->arg = arg;
3486 root 1.16
3487 root 1.123 ev_init (&once->io, once_cb_io);
3488     if (fd >= 0)
3489     {
3490     ev_io_set (&once->io, fd, events);
3491     ev_io_start (EV_A_ &once->io);
3492     }
3493 root 1.16
3494 root 1.123 ev_init (&once->to, once_cb_to);
3495     if (timeout >= 0.)
3496     {
3497     ev_timer_set (&once->to, timeout, 0.);
3498     ev_timer_start (EV_A_ &once->to);
3499 root 1.16 }
3500     }
3501    
3502 root 1.282 /*****************************************************************************/
3503    
3504 root 1.288 #if EV_WALK_ENABLE
3505 root 1.282 void
3506     ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3507     {
3508     int i, j;
3509     ev_watcher_list *wl, *wn;
3510    
3511     if (types & (EV_IO | EV_EMBED))
3512     for (i = 0; i < anfdmax; ++i)
3513     for (wl = anfds [i].head; wl; )
3514     {
3515     wn = wl->next;
3516    
3517     #if EV_EMBED_ENABLE
3518     if (ev_cb ((ev_io *)wl) == embed_io_cb)
3519     {
3520     if (types & EV_EMBED)
3521     cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3522     }
3523     else
3524     #endif
3525     #if EV_USE_INOTIFY
3526     if (ev_cb ((ev_io *)wl) == infy_cb)
3527     ;
3528     else
3529     #endif
3530 root 1.288 if ((ev_io *)wl != &pipe_w)
3531 root 1.282 if (types & EV_IO)
3532     cb (EV_A_ EV_IO, wl);
3533    
3534     wl = wn;
3535     }
3536    
3537     if (types & (EV_TIMER | EV_STAT))
3538     for (i = timercnt + HEAP0; i-- > HEAP0; )
3539     #if EV_STAT_ENABLE
3540     /*TODO: timer is not always active*/
3541     if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3542     {
3543     if (types & EV_STAT)
3544     cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3545     }
3546     else
3547     #endif
3548     if (types & EV_TIMER)
3549     cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3550    
3551     #if EV_PERIODIC_ENABLE
3552     if (types & EV_PERIODIC)
3553     for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3554     cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3555     #endif
3556    
3557     #if EV_IDLE_ENABLE
3558     if (types & EV_IDLE)
3559     for (j = NUMPRI; i--; )
3560     for (i = idlecnt [j]; i--; )
3561     cb (EV_A_ EV_IDLE, idles [j][i]);
3562     #endif
3563    
3564     #if EV_FORK_ENABLE
3565     if (types & EV_FORK)
3566     for (i = forkcnt; i--; )
3567     if (ev_cb (forks [i]) != embed_fork_cb)
3568     cb (EV_A_ EV_FORK, forks [i]);
3569     #endif
3570    
3571     #if EV_ASYNC_ENABLE
3572     if (types & EV_ASYNC)
3573     for (i = asynccnt; i--; )
3574     cb (EV_A_ EV_ASYNC, asyncs [i]);
3575     #endif
3576    
3577     if (types & EV_PREPARE)
3578     for (i = preparecnt; i--; )
3579     #if EV_EMBED_ENABLE
3580     if (ev_cb (prepares [i]) != embed_prepare_cb)
3581     #endif
3582     cb (EV_A_ EV_PREPARE, prepares [i]);
3583    
3584     if (types & EV_CHECK)
3585     for (i = checkcnt; i--; )
3586     cb (EV_A_ EV_CHECK, checks [i]);
3587    
3588     if (types & EV_SIGNAL)
3589 root 1.306 for (i = 0; i < EV_NSIG - 1; ++i)
3590 root 1.282 for (wl = signals [i].head; wl; )
3591     {
3592     wn = wl->next;
3593     cb (EV_A_ EV_SIGNAL, wl);
3594     wl = wn;
3595     }
3596    
3597     if (types & EV_CHILD)
3598     for (i = EV_PID_HASHSIZE; i--; )
3599     for (wl = childs [i]; wl; )
3600     {
3601     wn = wl->next;
3602     cb (EV_A_ EV_CHILD, wl);
3603     wl = wn;
3604     }
3605     /* EV_STAT 0x00001000 /* stat data changed */
3606     /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3607     }
3608     #endif
3609    
3610 root 1.188 #if EV_MULTIPLICITY
3611     #include "ev_wrap.h"
3612     #endif
3613    
3614 root 1.87 #ifdef __cplusplus
3615     }
3616     #endif
3617