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Revision: 1.268
Committed: Mon Oct 27 13:39:18 2008 UTC (15 years, 6 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.267: +1 -0 lines
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# User Rev Content
1 root 1.17 /*
2 root 1.36 * libev event processing core, watcher management
3     *
4 root 1.207 * Copyright (c) 2007,2008 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     # if HAVE_CLOCK_GETTIME
53 root 1.97 # ifndef EV_USE_MONOTONIC
54     # define EV_USE_MONOTONIC 1
55     # endif
56     # ifndef EV_USE_REALTIME
57     # define EV_USE_REALTIME 1
58     # endif
59 root 1.126 # else
60     # ifndef EV_USE_MONOTONIC
61     # define EV_USE_MONOTONIC 0
62     # endif
63     # ifndef EV_USE_REALTIME
64     # define EV_USE_REALTIME 0
65     # endif
66 root 1.60 # endif
67    
68 root 1.193 # ifndef EV_USE_NANOSLEEP
69     # if HAVE_NANOSLEEP
70     # define EV_USE_NANOSLEEP 1
71     # else
72     # define EV_USE_NANOSLEEP 0
73     # endif
74     # endif
75    
76 root 1.127 # ifndef EV_USE_SELECT
77     # if HAVE_SELECT && HAVE_SYS_SELECT_H
78     # define EV_USE_SELECT 1
79     # else
80     # define EV_USE_SELECT 0
81     # endif
82 root 1.60 # endif
83    
84 root 1.127 # ifndef EV_USE_POLL
85     # if HAVE_POLL && HAVE_POLL_H
86     # define EV_USE_POLL 1
87     # else
88     # define EV_USE_POLL 0
89     # endif
90 root 1.60 # endif
91 root 1.127
92     # ifndef EV_USE_EPOLL
93     # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94     # define EV_USE_EPOLL 1
95     # else
96     # define EV_USE_EPOLL 0
97     # endif
98 root 1.60 # endif
99 root 1.127
100     # ifndef EV_USE_KQUEUE
101     # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102     # define EV_USE_KQUEUE 1
103     # else
104     # define EV_USE_KQUEUE 0
105     # endif
106 root 1.60 # endif
107 root 1.127
108     # ifndef EV_USE_PORT
109     # if HAVE_PORT_H && HAVE_PORT_CREATE
110     # define EV_USE_PORT 1
111     # else
112     # define EV_USE_PORT 0
113     # endif
114 root 1.118 # endif
115    
116 root 1.152 # ifndef EV_USE_INOTIFY
117     # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118     # define EV_USE_INOTIFY 1
119     # else
120     # define EV_USE_INOTIFY 0
121     # endif
122     # endif
123    
124 root 1.220 # ifndef EV_USE_EVENTFD
125     # if HAVE_EVENTFD
126     # define EV_USE_EVENTFD 1
127     # else
128     # define EV_USE_EVENTFD 0
129     # endif
130     # endif
131 root 1.250
132 root 1.29 #endif
133 root 1.17
134 root 1.1 #include <math.h>
135     #include <stdlib.h>
136 root 1.7 #include <fcntl.h>
137 root 1.16 #include <stddef.h>
138 root 1.1
139     #include <stdio.h>
140    
141 root 1.4 #include <assert.h>
142 root 1.1 #include <errno.h>
143 root 1.22 #include <sys/types.h>
144 root 1.71 #include <time.h>
145    
146 root 1.72 #include <signal.h>
147 root 1.71
148 root 1.152 #ifdef EV_H
149     # include EV_H
150     #else
151     # include "ev.h"
152     #endif
153    
154 root 1.103 #ifndef _WIN32
155 root 1.71 # include <sys/time.h>
156 root 1.45 # include <sys/wait.h>
157 root 1.140 # include <unistd.h>
158 root 1.103 #else
159 root 1.256 # include <io.h>
160 root 1.103 # define WIN32_LEAN_AND_MEAN
161     # include <windows.h>
162     # ifndef EV_SELECT_IS_WINSOCKET
163     # define EV_SELECT_IS_WINSOCKET 1
164     # endif
165 root 1.45 #endif
166 root 1.103
167 root 1.220 /* this block tries to deduce configuration from header-defined symbols and defaults */
168 root 1.40
169 root 1.29 #ifndef EV_USE_MONOTONIC
170 root 1.253 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171     # define EV_USE_MONOTONIC 1
172     # else
173     # define EV_USE_MONOTONIC 0
174     # endif
175 root 1.37 #endif
176    
177 root 1.118 #ifndef EV_USE_REALTIME
178 root 1.121 # define EV_USE_REALTIME 0
179 root 1.118 #endif
180    
181 root 1.193 #ifndef EV_USE_NANOSLEEP
182 root 1.253 # if _POSIX_C_SOURCE >= 199309L
183     # define EV_USE_NANOSLEEP 1
184     # else
185     # define EV_USE_NANOSLEEP 0
186     # endif
187 root 1.193 #endif
188    
189 root 1.29 #ifndef EV_USE_SELECT
190     # define EV_USE_SELECT 1
191 root 1.10 #endif
192    
193 root 1.59 #ifndef EV_USE_POLL
194 root 1.104 # ifdef _WIN32
195     # define EV_USE_POLL 0
196     # else
197     # define EV_USE_POLL 1
198     # endif
199 root 1.41 #endif
200    
201 root 1.29 #ifndef EV_USE_EPOLL
202 root 1.220 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203     # define EV_USE_EPOLL 1
204     # else
205     # define EV_USE_EPOLL 0
206     # endif
207 root 1.10 #endif
208    
209 root 1.44 #ifndef EV_USE_KQUEUE
210     # define EV_USE_KQUEUE 0
211     #endif
212    
213 root 1.118 #ifndef EV_USE_PORT
214     # define EV_USE_PORT 0
215 root 1.40 #endif
216    
217 root 1.152 #ifndef EV_USE_INOTIFY
218 root 1.220 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219     # define EV_USE_INOTIFY 1
220     # else
221     # define EV_USE_INOTIFY 0
222     # endif
223 root 1.152 #endif
224    
225 root 1.149 #ifndef EV_PID_HASHSIZE
226     # if EV_MINIMAL
227     # define EV_PID_HASHSIZE 1
228     # else
229     # define EV_PID_HASHSIZE 16
230     # endif
231     #endif
232    
233 root 1.152 #ifndef EV_INOTIFY_HASHSIZE
234     # if EV_MINIMAL
235     # define EV_INOTIFY_HASHSIZE 1
236     # else
237     # define EV_INOTIFY_HASHSIZE 16
238     # endif
239     #endif
240    
241 root 1.220 #ifndef EV_USE_EVENTFD
242     # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243     # define EV_USE_EVENTFD 1
244     # else
245     # define EV_USE_EVENTFD 0
246     # endif
247     #endif
248    
249 root 1.249 #if 0 /* debugging */
250 root 1.250 # define EV_VERIFY 3
251 root 1.249 # define EV_USE_4HEAP 1
252     # define EV_HEAP_CACHE_AT 1
253     #endif
254    
255 root 1.250 #ifndef EV_VERIFY
256     # define EV_VERIFY !EV_MINIMAL
257     #endif
258    
259 root 1.243 #ifndef EV_USE_4HEAP
260     # define EV_USE_4HEAP !EV_MINIMAL
261     #endif
262    
263     #ifndef EV_HEAP_CACHE_AT
264     # define EV_HEAP_CACHE_AT !EV_MINIMAL
265     #endif
266    
267 root 1.220 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
268 root 1.40
269     #ifndef CLOCK_MONOTONIC
270     # undef EV_USE_MONOTONIC
271     # define EV_USE_MONOTONIC 0
272     #endif
273    
274 root 1.31 #ifndef CLOCK_REALTIME
275 root 1.40 # undef EV_USE_REALTIME
276 root 1.31 # define EV_USE_REALTIME 0
277     #endif
278 root 1.40
279 root 1.152 #if !EV_STAT_ENABLE
280 root 1.185 # undef EV_USE_INOTIFY
281 root 1.152 # define EV_USE_INOTIFY 0
282     #endif
283    
284 root 1.193 #if !EV_USE_NANOSLEEP
285     # ifndef _WIN32
286     # include <sys/select.h>
287     # endif
288     #endif
289    
290 root 1.152 #if EV_USE_INOTIFY
291 root 1.264 # include <sys/utsname.h>
292 root 1.152 # include <sys/inotify.h>
293 root 1.263 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294     # ifndef IN_DONT_FOLLOW
295     # undef EV_USE_INOTIFY
296     # define EV_USE_INOTIFY 0
297     # endif
298 root 1.152 #endif
299    
300 root 1.185 #if EV_SELECT_IS_WINSOCKET
301     # include <winsock.h>
302     #endif
303    
304 root 1.220 #if EV_USE_EVENTFD
305     /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306 root 1.221 # include <stdint.h>
307 root 1.222 # ifdef __cplusplus
308     extern "C" {
309     # endif
310 root 1.220 int eventfd (unsigned int initval, int flags);
311 root 1.222 # ifdef __cplusplus
312     }
313     # endif
314 root 1.220 #endif
315    
316 root 1.40 /**/
317 root 1.1
318 root 1.250 #if EV_VERIFY >= 3
319 root 1.248 # define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320     #else
321     # define EV_FREQUENT_CHECK do { } while (0)
322     #endif
323    
324 root 1.176 /*
325     * This is used to avoid floating point rounding problems.
326     * It is added to ev_rt_now when scheduling periodics
327     * to ensure progress, time-wise, even when rounding
328     * errors are against us.
329 root 1.177 * This value is good at least till the year 4000.
330 root 1.176 * Better solutions welcome.
331     */
332     #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
333    
334 root 1.4 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
335 root 1.120 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
336 root 1.176 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
337 root 1.1
338 root 1.185 #if __GNUC__ >= 4
339 root 1.40 # define expect(expr,value) __builtin_expect ((expr),(value))
340 root 1.169 # define noinline __attribute__ ((noinline))
341 root 1.40 #else
342     # define expect(expr,value) (expr)
343 root 1.140 # define noinline
344 root 1.223 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345 root 1.169 # define inline
346     # endif
347 root 1.40 #endif
348    
349     #define expect_false(expr) expect ((expr) != 0, 0)
350     #define expect_true(expr) expect ((expr) != 0, 1)
351 root 1.169 #define inline_size static inline
352    
353     #if EV_MINIMAL
354     # define inline_speed static noinline
355     #else
356     # define inline_speed static inline
357     #endif
358 root 1.40
359 root 1.42 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
360 root 1.164 #define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
361 root 1.42
362 root 1.164 #define EMPTY /* required for microsofts broken pseudo-c compiler */
363 root 1.114 #define EMPTY2(a,b) /* used to suppress some warnings */
364 root 1.103
365 root 1.136 typedef ev_watcher *W;
366     typedef ev_watcher_list *WL;
367     typedef ev_watcher_time *WT;
368 root 1.10
369 root 1.229 #define ev_active(w) ((W)(w))->active
370 root 1.228 #define ev_at(w) ((WT)(w))->at
371    
372 root 1.198 #if EV_USE_MONOTONIC
373 root 1.194 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
374     /* giving it a reasonably high chance of working on typical architetcures */
375 root 1.207 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376 root 1.198 #endif
377 root 1.54
378 root 1.103 #ifdef _WIN32
379 root 1.98 # include "ev_win32.c"
380     #endif
381 root 1.67
382 root 1.53 /*****************************************************************************/
383 root 1.1
384 root 1.70 static void (*syserr_cb)(const char *msg);
385 root 1.69
386 root 1.141 void
387     ev_set_syserr_cb (void (*cb)(const char *msg))
388 root 1.69 {
389     syserr_cb = cb;
390     }
391    
392 root 1.141 static void noinline
393 root 1.70 syserr (const char *msg)
394 root 1.69 {
395 root 1.70 if (!msg)
396     msg = "(libev) system error";
397    
398 root 1.69 if (syserr_cb)
399 root 1.70 syserr_cb (msg);
400 root 1.69 else
401     {
402 root 1.70 perror (msg);
403 root 1.69 abort ();
404     }
405     }
406    
407 root 1.224 static void *
408     ev_realloc_emul (void *ptr, long size)
409     {
410     /* some systems, notably openbsd and darwin, fail to properly
411     * implement realloc (x, 0) (as required by both ansi c-98 and
412     * the single unix specification, so work around them here.
413     */
414    
415     if (size)
416     return realloc (ptr, size);
417    
418     free (ptr);
419     return 0;
420     }
421    
422     static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
423 root 1.69
424 root 1.141 void
425 root 1.155 ev_set_allocator (void *(*cb)(void *ptr, long size))
426 root 1.69 {
427     alloc = cb;
428     }
429    
430 root 1.150 inline_speed void *
431 root 1.155 ev_realloc (void *ptr, long size)
432 root 1.69 {
433 root 1.224 ptr = alloc (ptr, size);
434 root 1.69
435     if (!ptr && size)
436     {
437 root 1.155 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
438 root 1.69 abort ();
439     }
440    
441     return ptr;
442     }
443    
444     #define ev_malloc(size) ev_realloc (0, (size))
445     #define ev_free(ptr) ev_realloc ((ptr), 0)
446    
447     /*****************************************************************************/
448    
449 root 1.53 typedef struct
450     {
451 root 1.68 WL head;
452 root 1.53 unsigned char events;
453     unsigned char reify;
454 root 1.265 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 root 1.267 unsigned char egen; /* generation counter to counter epoll bugs */
456 root 1.103 #if EV_SELECT_IS_WINSOCKET
457     SOCKET handle;
458     #endif
459 root 1.53 } ANFD;
460 root 1.1
461 root 1.53 typedef struct
462     {
463     W w;
464     int events;
465     } ANPENDING;
466 root 1.51
467 root 1.155 #if EV_USE_INOTIFY
468 root 1.241 /* hash table entry per inotify-id */
469 root 1.152 typedef struct
470     {
471     WL head;
472 root 1.155 } ANFS;
473 root 1.152 #endif
474    
475 root 1.241 /* Heap Entry */
476     #if EV_HEAP_CACHE_AT
477     typedef struct {
478 root 1.243 ev_tstamp at;
479 root 1.241 WT w;
480     } ANHE;
481    
482 root 1.248 #define ANHE_w(he) (he).w /* access watcher, read-write */
483     #define ANHE_at(he) (he).at /* access cached at, read-only */
484     #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485 root 1.241 #else
486     typedef WT ANHE;
487    
488 root 1.248 #define ANHE_w(he) (he)
489     #define ANHE_at(he) (he)->at
490     #define ANHE_at_cache(he)
491 root 1.241 #endif
492    
493 root 1.55 #if EV_MULTIPLICITY
494 root 1.54
495 root 1.80 struct ev_loop
496     {
497 root 1.86 ev_tstamp ev_rt_now;
498 root 1.99 #define ev_rt_now ((loop)->ev_rt_now)
499 root 1.80 #define VAR(name,decl) decl;
500     #include "ev_vars.h"
501     #undef VAR
502     };
503     #include "ev_wrap.h"
504    
505 root 1.116 static struct ev_loop default_loop_struct;
506     struct ev_loop *ev_default_loop_ptr;
507 root 1.54
508 root 1.53 #else
509 root 1.54
510 root 1.86 ev_tstamp ev_rt_now;
511 root 1.80 #define VAR(name,decl) static decl;
512     #include "ev_vars.h"
513     #undef VAR
514    
515 root 1.116 static int ev_default_loop_ptr;
516 root 1.54
517 root 1.51 #endif
518 root 1.1
519 root 1.8 /*****************************************************************************/
520    
521 root 1.141 ev_tstamp
522 root 1.1 ev_time (void)
523     {
524 root 1.29 #if EV_USE_REALTIME
525 root 1.1 struct timespec ts;
526     clock_gettime (CLOCK_REALTIME, &ts);
527     return ts.tv_sec + ts.tv_nsec * 1e-9;
528     #else
529     struct timeval tv;
530     gettimeofday (&tv, 0);
531     return tv.tv_sec + tv.tv_usec * 1e-6;
532     #endif
533     }
534    
535 root 1.140 ev_tstamp inline_size
536 root 1.1 get_clock (void)
537     {
538 root 1.29 #if EV_USE_MONOTONIC
539 root 1.40 if (expect_true (have_monotonic))
540 root 1.1 {
541     struct timespec ts;
542     clock_gettime (CLOCK_MONOTONIC, &ts);
543     return ts.tv_sec + ts.tv_nsec * 1e-9;
544     }
545     #endif
546    
547     return ev_time ();
548     }
549    
550 root 1.85 #if EV_MULTIPLICITY
551 root 1.51 ev_tstamp
552     ev_now (EV_P)
553     {
554 root 1.85 return ev_rt_now;
555 root 1.51 }
556 root 1.85 #endif
557 root 1.51
558 root 1.193 void
559     ev_sleep (ev_tstamp delay)
560     {
561     if (delay > 0.)
562     {
563     #if EV_USE_NANOSLEEP
564     struct timespec ts;
565    
566     ts.tv_sec = (time_t)delay;
567     ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568    
569     nanosleep (&ts, 0);
570     #elif defined(_WIN32)
571 root 1.217 Sleep ((unsigned long)(delay * 1e3));
572 root 1.193 #else
573     struct timeval tv;
574    
575     tv.tv_sec = (time_t)delay;
576     tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577    
578 root 1.257 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579     /* somehting nto guaranteed by newer posix versions, but guaranteed */
580     /* by older ones */
581 root 1.193 select (0, 0, 0, 0, &tv);
582     #endif
583     }
584     }
585    
586     /*****************************************************************************/
587    
588 root 1.233 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589 root 1.232
590 root 1.163 int inline_size
591     array_nextsize (int elem, int cur, int cnt)
592     {
593     int ncur = cur + 1;
594    
595     do
596     ncur <<= 1;
597     while (cnt > ncur);
598    
599 root 1.232 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600     if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
601 root 1.163 {
602     ncur *= elem;
603 root 1.232 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
604 root 1.163 ncur = ncur - sizeof (void *) * 4;
605     ncur /= elem;
606     }
607    
608     return ncur;
609     }
610    
611 root 1.171 static noinline void *
612 root 1.163 array_realloc (int elem, void *base, int *cur, int cnt)
613     {
614     *cur = array_nextsize (elem, *cur, cnt);
615     return ev_realloc (base, elem * *cur);
616     }
617 root 1.29
618 root 1.265 #define array_init_zero(base,count) \
619     memset ((void *)(base), 0, sizeof (*(base)) * (count))
620    
621 root 1.74 #define array_needsize(type,base,cur,cnt,init) \
622 root 1.163 if (expect_false ((cnt) > (cur))) \
623 root 1.69 { \
624 root 1.163 int ocur_ = (cur); \
625     (base) = (type *)array_realloc \
626     (sizeof (type), (base), &(cur), (cnt)); \
627     init ((base) + (ocur_), (cur) - ocur_); \
628 root 1.1 }
629    
630 root 1.163 #if 0
631 root 1.74 #define array_slim(type,stem) \
632 root 1.67 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
633     { \
634     stem ## max = array_roundsize (stem ## cnt >> 1); \
635 root 1.74 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
636 root 1.67 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637     }
638 root 1.163 #endif
639 root 1.67
640 root 1.65 #define array_free(stem, idx) \
641 root 1.69 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
642 root 1.65
643 root 1.8 /*****************************************************************************/
644    
645 root 1.140 void noinline
646 root 1.78 ev_feed_event (EV_P_ void *w, int revents)
647 root 1.1 {
648 root 1.78 W w_ = (W)w;
649 root 1.171 int pri = ABSPRI (w_);
650 root 1.78
651 root 1.123 if (expect_false (w_->pending))
652 root 1.171 pendings [pri][w_->pending - 1].events |= revents;
653     else
654 root 1.32 {
655 root 1.171 w_->pending = ++pendingcnt [pri];
656     array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657     pendings [pri][w_->pending - 1].w = w_;
658     pendings [pri][w_->pending - 1].events = revents;
659 root 1.32 }
660 root 1.1 }
661    
662 root 1.179 void inline_speed
663 root 1.51 queue_events (EV_P_ W *events, int eventcnt, int type)
664 root 1.27 {
665     int i;
666    
667     for (i = 0; i < eventcnt; ++i)
668 root 1.78 ev_feed_event (EV_A_ events [i], type);
669 root 1.27 }
670    
671 root 1.141 /*****************************************************************************/
672    
673 root 1.140 void inline_speed
674 root 1.79 fd_event (EV_P_ int fd, int revents)
675 root 1.1 {
676     ANFD *anfd = anfds + fd;
677 root 1.136 ev_io *w;
678 root 1.1
679 root 1.136 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
680 root 1.1 {
681 root 1.79 int ev = w->events & revents;
682 root 1.1
683     if (ev)
684 root 1.78 ev_feed_event (EV_A_ (W)w, ev);
685 root 1.1 }
686     }
687    
688 root 1.79 void
689     ev_feed_fd_event (EV_P_ int fd, int revents)
690     {
691 root 1.168 if (fd >= 0 && fd < anfdmax)
692     fd_event (EV_A_ fd, revents);
693 root 1.79 }
694    
695 root 1.140 void inline_size
696 root 1.51 fd_reify (EV_P)
697 root 1.9 {
698     int i;
699    
700 root 1.27 for (i = 0; i < fdchangecnt; ++i)
701     {
702     int fd = fdchanges [i];
703     ANFD *anfd = anfds + fd;
704 root 1.136 ev_io *w;
705 root 1.27
706 root 1.184 unsigned char events = 0;
707 root 1.27
708 root 1.136 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
709 root 1.184 events |= (unsigned char)w->events;
710 root 1.27
711 root 1.103 #if EV_SELECT_IS_WINSOCKET
712     if (events)
713     {
714 root 1.254 unsigned long arg;
715 root 1.200 #ifdef EV_FD_TO_WIN32_HANDLE
716     anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717     #else
718     anfd->handle = _get_osfhandle (fd);
719     #endif
720 root 1.254 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
721 root 1.103 }
722     #endif
723    
724 root 1.184 {
725     unsigned char o_events = anfd->events;
726     unsigned char o_reify = anfd->reify;
727    
728     anfd->reify = 0;
729     anfd->events = events;
730 root 1.27
731 root 1.184 if (o_events != events || o_reify & EV_IOFDSET)
732     backend_modify (EV_A_ fd, o_events, events);
733     }
734 root 1.27 }
735    
736     fdchangecnt = 0;
737     }
738    
739 root 1.140 void inline_size
740 root 1.183 fd_change (EV_P_ int fd, int flags)
741 root 1.27 {
742 root 1.183 unsigned char reify = anfds [fd].reify;
743 root 1.184 anfds [fd].reify |= flags;
744 root 1.27
745 root 1.183 if (expect_true (!reify))
746     {
747     ++fdchangecnt;
748     array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
749     fdchanges [fdchangecnt - 1] = fd;
750     }
751 root 1.9 }
752    
753 root 1.140 void inline_speed
754 root 1.51 fd_kill (EV_P_ int fd)
755 root 1.41 {
756 root 1.136 ev_io *w;
757 root 1.41
758 root 1.136 while ((w = (ev_io *)anfds [fd].head))
759 root 1.41 {
760 root 1.51 ev_io_stop (EV_A_ w);
761 root 1.78 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
762 root 1.41 }
763     }
764    
765 root 1.140 int inline_size
766 root 1.71 fd_valid (int fd)
767     {
768 root 1.103 #ifdef _WIN32
769     return _get_osfhandle (fd) != -1;
770 root 1.71 #else
771     return fcntl (fd, F_GETFD) != -1;
772     #endif
773     }
774    
775 root 1.19 /* called on EBADF to verify fds */
776 root 1.140 static void noinline
777 root 1.51 fd_ebadf (EV_P)
778 root 1.19 {
779     int fd;
780    
781     for (fd = 0; fd < anfdmax; ++fd)
782 root 1.27 if (anfds [fd].events)
783 root 1.254 if (!fd_valid (fd) && errno == EBADF)
784 root 1.51 fd_kill (EV_A_ fd);
785 root 1.41 }
786    
787     /* called on ENOMEM in select/poll to kill some fds and retry */
788 root 1.140 static void noinline
789 root 1.51 fd_enomem (EV_P)
790 root 1.41 {
791 root 1.62 int fd;
792 root 1.41
793 root 1.62 for (fd = anfdmax; fd--; )
794 root 1.41 if (anfds [fd].events)
795     {
796 root 1.51 fd_kill (EV_A_ fd);
797 root 1.41 return;
798     }
799 root 1.19 }
800    
801 root 1.130 /* usually called after fork if backend needs to re-arm all fds from scratch */
802 root 1.140 static void noinline
803 root 1.56 fd_rearm_all (EV_P)
804     {
805     int fd;
806    
807     for (fd = 0; fd < anfdmax; ++fd)
808     if (anfds [fd].events)
809     {
810     anfds [fd].events = 0;
811 root 1.268 anfds [fd].emask = 0;
812 root 1.184 fd_change (EV_A_ fd, EV_IOFDSET | 1);
813 root 1.56 }
814     }
815    
816 root 1.8 /*****************************************************************************/
817    
818 root 1.235 /*
819 root 1.241 * the heap functions want a real array index. array index 0 uis guaranteed to not
820     * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
821     * the branching factor of the d-tree.
822     */
823    
824     /*
825 root 1.235 * at the moment we allow libev the luxury of two heaps,
826     * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
827     * which is more cache-efficient.
828     * the difference is about 5% with 50000+ watchers.
829     */
830 root 1.241 #if EV_USE_4HEAP
831 root 1.235
832 root 1.237 #define DHEAP 4
833     #define HEAP0 (DHEAP - 1) /* index of first element in heap */
834 root 1.247 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
835 root 1.248 #define UPHEAP_DONE(p,k) ((p) == (k))
836 root 1.235
837     /* away from the root */
838     void inline_speed
839 root 1.241 downheap (ANHE *heap, int N, int k)
840 root 1.235 {
841 root 1.241 ANHE he = heap [k];
842     ANHE *E = heap + N + HEAP0;
843 root 1.235
844     for (;;)
845     {
846     ev_tstamp minat;
847 root 1.241 ANHE *minpos;
848 root 1.248 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
849 root 1.235
850 root 1.248 /* find minimum child */
851 root 1.237 if (expect_true (pos + DHEAP - 1 < E))
852 root 1.235 {
853 root 1.245 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
854     if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
855     if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
856     if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
857 root 1.235 }
858 root 1.240 else if (pos < E)
859 root 1.235 {
860 root 1.241 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
861     if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
862     if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
863     if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
864 root 1.235 }
865 root 1.240 else
866     break;
867 root 1.235
868 root 1.241 if (ANHE_at (he) <= minat)
869 root 1.235 break;
870    
871 root 1.247 heap [k] = *minpos;
872 root 1.241 ev_active (ANHE_w (*minpos)) = k;
873 root 1.235
874     k = minpos - heap;
875     }
876    
877 root 1.247 heap [k] = he;
878 root 1.241 ev_active (ANHE_w (he)) = k;
879 root 1.235 }
880    
881 root 1.248 #else /* 4HEAP */
882 root 1.235
883     #define HEAP0 1
884 root 1.247 #define HPARENT(k) ((k) >> 1)
885 root 1.248 #define UPHEAP_DONE(p,k) (!(p))
886 root 1.235
887 root 1.248 /* away from the root */
888 root 1.140 void inline_speed
889 root 1.248 downheap (ANHE *heap, int N, int k)
890 root 1.1 {
891 root 1.241 ANHE he = heap [k];
892 root 1.1
893 root 1.228 for (;;)
894 root 1.1 {
895 root 1.248 int c = k << 1;
896 root 1.179
897 root 1.248 if (c > N + HEAP0 - 1)
898 root 1.179 break;
899    
900 root 1.248 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
901     ? 1 : 0;
902    
903     if (ANHE_at (he) <= ANHE_at (heap [c]))
904     break;
905    
906     heap [k] = heap [c];
907 root 1.241 ev_active (ANHE_w (heap [k])) = k;
908 root 1.248
909     k = c;
910 root 1.1 }
911    
912 root 1.243 heap [k] = he;
913 root 1.248 ev_active (ANHE_w (he)) = k;
914 root 1.1 }
915 root 1.248 #endif
916 root 1.1
917 root 1.248 /* towards the root */
918 root 1.140 void inline_speed
919 root 1.248 upheap (ANHE *heap, int k)
920 root 1.1 {
921 root 1.241 ANHE he = heap [k];
922 root 1.1
923 root 1.179 for (;;)
924 root 1.1 {
925 root 1.248 int p = HPARENT (k);
926 root 1.179
927 root 1.248 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
928 root 1.179 break;
929 root 1.1
930 root 1.248 heap [k] = heap [p];
931 root 1.241 ev_active (ANHE_w (heap [k])) = k;
932 root 1.248 k = p;
933 root 1.1 }
934    
935 root 1.241 heap [k] = he;
936     ev_active (ANHE_w (he)) = k;
937 root 1.1 }
938    
939 root 1.140 void inline_size
940 root 1.241 adjustheap (ANHE *heap, int N, int k)
941 root 1.84 {
942 root 1.247 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
943     upheap (heap, k);
944     else
945     downheap (heap, N, k);
946 root 1.84 }
947    
948 root 1.248 /* rebuild the heap: this function is used only once and executed rarely */
949     void inline_size
950     reheap (ANHE *heap, int N)
951     {
952     int i;
953 root 1.251
954 root 1.248 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
955     /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
956     for (i = 0; i < N; ++i)
957     upheap (heap, i + HEAP0);
958     }
959    
960 root 1.8 /*****************************************************************************/
961    
962 root 1.7 typedef struct
963     {
964 root 1.68 WL head;
965 root 1.207 EV_ATOMIC_T gotsig;
966 root 1.7 } ANSIG;
967    
968     static ANSIG *signals;
969 root 1.4 static int signalmax;
970 root 1.1
971 root 1.207 static EV_ATOMIC_T gotsig;
972 root 1.7
973 root 1.207 /*****************************************************************************/
974    
975     void inline_speed
976     fd_intern (int fd)
977     {
978     #ifdef _WIN32
979 root 1.254 unsigned long arg = 1;
980 root 1.207 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
981     #else
982     fcntl (fd, F_SETFD, FD_CLOEXEC);
983     fcntl (fd, F_SETFL, O_NONBLOCK);
984     #endif
985     }
986    
987     static void noinline
988     evpipe_init (EV_P)
989     {
990     if (!ev_is_active (&pipeev))
991     {
992 root 1.220 #if EV_USE_EVENTFD
993     if ((evfd = eventfd (0, 0)) >= 0)
994     {
995     evpipe [0] = -1;
996     fd_intern (evfd);
997     ev_io_set (&pipeev, evfd, EV_READ);
998     }
999     else
1000     #endif
1001     {
1002     while (pipe (evpipe))
1003     syserr ("(libev) error creating signal/async pipe");
1004 root 1.207
1005 root 1.220 fd_intern (evpipe [0]);
1006     fd_intern (evpipe [1]);
1007     ev_io_set (&pipeev, evpipe [0], EV_READ);
1008     }
1009 root 1.207
1010     ev_io_start (EV_A_ &pipeev);
1011 root 1.210 ev_unref (EV_A); /* watcher should not keep loop alive */
1012 root 1.207 }
1013     }
1014    
1015     void inline_size
1016 root 1.214 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1017 root 1.207 {
1018 root 1.214 if (!*flag)
1019 root 1.207 {
1020 ayin 1.215 int old_errno = errno; /* save errno because write might clobber it */
1021 root 1.214
1022     *flag = 1;
1023 root 1.220
1024     #if EV_USE_EVENTFD
1025     if (evfd >= 0)
1026     {
1027     uint64_t counter = 1;
1028     write (evfd, &counter, sizeof (uint64_t));
1029     }
1030     else
1031     #endif
1032     write (evpipe [1], &old_errno, 1);
1033 root 1.214
1034 root 1.207 errno = old_errno;
1035     }
1036     }
1037    
1038     static void
1039     pipecb (EV_P_ ev_io *iow, int revents)
1040     {
1041 root 1.220 #if EV_USE_EVENTFD
1042     if (evfd >= 0)
1043     {
1044 root 1.232 uint64_t counter;
1045 root 1.220 read (evfd, &counter, sizeof (uint64_t));
1046     }
1047     else
1048     #endif
1049     {
1050     char dummy;
1051     read (evpipe [0], &dummy, 1);
1052     }
1053 root 1.207
1054 root 1.211 if (gotsig && ev_is_default_loop (EV_A))
1055 root 1.207 {
1056     int signum;
1057     gotsig = 0;
1058    
1059     for (signum = signalmax; signum--; )
1060     if (signals [signum].gotsig)
1061     ev_feed_signal_event (EV_A_ signum + 1);
1062     }
1063    
1064 root 1.209 #if EV_ASYNC_ENABLE
1065 root 1.207 if (gotasync)
1066     {
1067     int i;
1068     gotasync = 0;
1069    
1070     for (i = asynccnt; i--; )
1071     if (asyncs [i]->sent)
1072     {
1073     asyncs [i]->sent = 0;
1074     ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1075     }
1076     }
1077 root 1.209 #endif
1078 root 1.207 }
1079    
1080     /*****************************************************************************/
1081    
1082 root 1.7 static void
1083 root 1.218 ev_sighandler (int signum)
1084 root 1.7 {
1085 root 1.207 #if EV_MULTIPLICITY
1086     struct ev_loop *loop = &default_loop_struct;
1087     #endif
1088    
1089 root 1.103 #if _WIN32
1090 root 1.218 signal (signum, ev_sighandler);
1091 root 1.67 #endif
1092    
1093 root 1.7 signals [signum - 1].gotsig = 1;
1094 root 1.214 evpipe_write (EV_A_ &gotsig);
1095 root 1.7 }
1096    
1097 root 1.140 void noinline
1098 root 1.79 ev_feed_signal_event (EV_P_ int signum)
1099     {
1100 root 1.80 WL w;
1101    
1102 root 1.79 #if EV_MULTIPLICITY
1103 root 1.116 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1104 root 1.79 #endif
1105    
1106     --signum;
1107    
1108     if (signum < 0 || signum >= signalmax)
1109     return;
1110    
1111     signals [signum].gotsig = 0;
1112    
1113     for (w = signals [signum].head; w; w = w->next)
1114     ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1115     }
1116    
1117 root 1.8 /*****************************************************************************/
1118    
1119 root 1.182 static WL childs [EV_PID_HASHSIZE];
1120 root 1.71
1121 root 1.103 #ifndef _WIN32
1122 root 1.45
1123 root 1.136 static ev_signal childev;
1124 root 1.59
1125 root 1.206 #ifndef WIFCONTINUED
1126     # define WIFCONTINUED(status) 0
1127     #endif
1128    
1129 root 1.140 void inline_speed
1130 root 1.216 child_reap (EV_P_ int chain, int pid, int status)
1131 root 1.47 {
1132 root 1.136 ev_child *w;
1133 root 1.206 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1134 root 1.47
1135 root 1.149 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1136 root 1.206 {
1137     if ((w->pid == pid || !w->pid)
1138     && (!traced || (w->flags & 1)))
1139     {
1140 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 */
1141 root 1.206 w->rpid = pid;
1142     w->rstatus = status;
1143     ev_feed_event (EV_A_ (W)w, EV_CHILD);
1144     }
1145     }
1146 root 1.47 }
1147    
1148 root 1.142 #ifndef WCONTINUED
1149     # define WCONTINUED 0
1150     #endif
1151    
1152 root 1.47 static void
1153 root 1.136 childcb (EV_P_ ev_signal *sw, int revents)
1154 root 1.22 {
1155     int pid, status;
1156    
1157 root 1.142 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1158     if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1159     if (!WCONTINUED
1160     || errno != EINVAL
1161     || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1162     return;
1163    
1164 root 1.216 /* make sure we are called again until all children have been reaped */
1165 root 1.142 /* we need to do it this way so that the callback gets called before we continue */
1166     ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1167 root 1.47
1168 root 1.216 child_reap (EV_A_ pid, pid, status);
1169 root 1.149 if (EV_PID_HASHSIZE > 1)
1170 root 1.216 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1171 root 1.22 }
1172    
1173 root 1.45 #endif
1174    
1175 root 1.22 /*****************************************************************************/
1176    
1177 root 1.118 #if EV_USE_PORT
1178     # include "ev_port.c"
1179     #endif
1180 root 1.44 #if EV_USE_KQUEUE
1181     # include "ev_kqueue.c"
1182     #endif
1183 root 1.29 #if EV_USE_EPOLL
1184 root 1.1 # include "ev_epoll.c"
1185     #endif
1186 root 1.59 #if EV_USE_POLL
1187 root 1.41 # include "ev_poll.c"
1188     #endif
1189 root 1.29 #if EV_USE_SELECT
1190 root 1.1 # include "ev_select.c"
1191     #endif
1192    
1193 root 1.24 int
1194     ev_version_major (void)
1195     {
1196     return EV_VERSION_MAJOR;
1197     }
1198    
1199     int
1200     ev_version_minor (void)
1201     {
1202     return EV_VERSION_MINOR;
1203     }
1204    
1205 root 1.49 /* return true if we are running with elevated privileges and should ignore env variables */
1206 root 1.140 int inline_size
1207 root 1.51 enable_secure (void)
1208 root 1.41 {
1209 root 1.103 #ifdef _WIN32
1210 root 1.49 return 0;
1211     #else
1212 root 1.41 return getuid () != geteuid ()
1213     || getgid () != getegid ();
1214 root 1.49 #endif
1215 root 1.41 }
1216    
1217 root 1.111 unsigned int
1218 root 1.129 ev_supported_backends (void)
1219     {
1220 root 1.130 unsigned int flags = 0;
1221 root 1.129
1222     if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1223     if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1224     if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1225     if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1226     if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1227    
1228     return flags;
1229     }
1230    
1231     unsigned int
1232 root 1.130 ev_recommended_backends (void)
1233 root 1.1 {
1234 root 1.131 unsigned int flags = ev_supported_backends ();
1235 root 1.129
1236     #ifndef __NetBSD__
1237     /* kqueue is borked on everything but netbsd apparently */
1238     /* it usually doesn't work correctly on anything but sockets and pipes */
1239     flags &= ~EVBACKEND_KQUEUE;
1240     #endif
1241     #ifdef __APPLE__
1242     // flags &= ~EVBACKEND_KQUEUE; for documentation
1243     flags &= ~EVBACKEND_POLL;
1244     #endif
1245    
1246     return flags;
1247 root 1.51 }
1248    
1249 root 1.130 unsigned int
1250 root 1.134 ev_embeddable_backends (void)
1251     {
1252 root 1.196 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1253    
1254 root 1.192 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1255 root 1.196 /* please fix it and tell me how to detect the fix */
1256     flags &= ~EVBACKEND_EPOLL;
1257    
1258     return flags;
1259 root 1.134 }
1260    
1261     unsigned int
1262 root 1.130 ev_backend (EV_P)
1263     {
1264     return backend;
1265     }
1266    
1267 root 1.162 unsigned int
1268     ev_loop_count (EV_P)
1269     {
1270     return loop_count;
1271     }
1272    
1273 root 1.193 void
1274     ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1275     {
1276     io_blocktime = interval;
1277     }
1278    
1279     void
1280     ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1281     {
1282     timeout_blocktime = interval;
1283     }
1284    
1285 root 1.151 static void noinline
1286 root 1.108 loop_init (EV_P_ unsigned int flags)
1287 root 1.51 {
1288 root 1.130 if (!backend)
1289 root 1.23 {
1290 root 1.29 #if EV_USE_MONOTONIC
1291 root 1.23 {
1292     struct timespec ts;
1293     if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1294     have_monotonic = 1;
1295     }
1296 root 1.1 #endif
1297    
1298 root 1.209 ev_rt_now = ev_time ();
1299     mn_now = get_clock ();
1300     now_floor = mn_now;
1301     rtmn_diff = ev_rt_now - mn_now;
1302 root 1.1
1303 root 1.193 io_blocktime = 0.;
1304     timeout_blocktime = 0.;
1305 root 1.209 backend = 0;
1306     backend_fd = -1;
1307     gotasync = 0;
1308     #if EV_USE_INOTIFY
1309     fs_fd = -2;
1310     #endif
1311 root 1.193
1312 root 1.158 /* pid check not overridable via env */
1313     #ifndef _WIN32
1314     if (flags & EVFLAG_FORKCHECK)
1315     curpid = getpid ();
1316     #endif
1317    
1318 root 1.128 if (!(flags & EVFLAG_NOENV)
1319     && !enable_secure ()
1320     && getenv ("LIBEV_FLAGS"))
1321 root 1.108 flags = atoi (getenv ("LIBEV_FLAGS"));
1322    
1323 root 1.225 if (!(flags & 0x0000ffffU))
1324 root 1.129 flags |= ev_recommended_backends ();
1325 root 1.41
1326 root 1.118 #if EV_USE_PORT
1327 root 1.130 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1328 root 1.118 #endif
1329 root 1.44 #if EV_USE_KQUEUE
1330 root 1.130 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1331 root 1.44 #endif
1332 root 1.29 #if EV_USE_EPOLL
1333 root 1.130 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1334 root 1.41 #endif
1335 root 1.59 #if EV_USE_POLL
1336 root 1.130 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1337 root 1.1 #endif
1338 root 1.29 #if EV_USE_SELECT
1339 root 1.130 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1340 root 1.1 #endif
1341 root 1.70
1342 root 1.207 ev_init (&pipeev, pipecb);
1343     ev_set_priority (&pipeev, EV_MAXPRI);
1344 root 1.56 }
1345     }
1346    
1347 root 1.151 static void noinline
1348 root 1.56 loop_destroy (EV_P)
1349     {
1350 root 1.65 int i;
1351    
1352 root 1.207 if (ev_is_active (&pipeev))
1353     {
1354     ev_ref (EV_A); /* signal watcher */
1355     ev_io_stop (EV_A_ &pipeev);
1356    
1357 root 1.220 #if EV_USE_EVENTFD
1358     if (evfd >= 0)
1359     close (evfd);
1360     #endif
1361    
1362     if (evpipe [0] >= 0)
1363     {
1364     close (evpipe [0]);
1365     close (evpipe [1]);
1366     }
1367 root 1.207 }
1368    
1369 root 1.152 #if EV_USE_INOTIFY
1370     if (fs_fd >= 0)
1371     close (fs_fd);
1372     #endif
1373    
1374     if (backend_fd >= 0)
1375     close (backend_fd);
1376    
1377 root 1.118 #if EV_USE_PORT
1378 root 1.130 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1379 root 1.118 #endif
1380 root 1.56 #if EV_USE_KQUEUE
1381 root 1.130 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1382 root 1.56 #endif
1383     #if EV_USE_EPOLL
1384 root 1.130 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1385 root 1.56 #endif
1386 root 1.59 #if EV_USE_POLL
1387 root 1.130 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1388 root 1.56 #endif
1389     #if EV_USE_SELECT
1390 root 1.130 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1391 root 1.56 #endif
1392 root 1.1
1393 root 1.65 for (i = NUMPRI; i--; )
1394 root 1.164 {
1395     array_free (pending, [i]);
1396     #if EV_IDLE_ENABLE
1397     array_free (idle, [i]);
1398     #endif
1399     }
1400 root 1.65
1401 root 1.186 ev_free (anfds); anfdmax = 0;
1402    
1403 root 1.71 /* have to use the microsoft-never-gets-it-right macro */
1404 root 1.164 array_free (fdchange, EMPTY);
1405     array_free (timer, EMPTY);
1406 root 1.140 #if EV_PERIODIC_ENABLE
1407 root 1.164 array_free (periodic, EMPTY);
1408 root 1.93 #endif
1409 root 1.187 #if EV_FORK_ENABLE
1410     array_free (fork, EMPTY);
1411     #endif
1412 root 1.164 array_free (prepare, EMPTY);
1413     array_free (check, EMPTY);
1414 root 1.209 #if EV_ASYNC_ENABLE
1415     array_free (async, EMPTY);
1416     #endif
1417 root 1.65
1418 root 1.130 backend = 0;
1419 root 1.56 }
1420 root 1.22
1421 root 1.226 #if EV_USE_INOTIFY
1422 root 1.154 void inline_size infy_fork (EV_P);
1423 root 1.226 #endif
1424 root 1.154
1425 root 1.151 void inline_size
1426 root 1.56 loop_fork (EV_P)
1427     {
1428 root 1.118 #if EV_USE_PORT
1429 root 1.130 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1430 root 1.56 #endif
1431     #if EV_USE_KQUEUE
1432 root 1.130 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1433 root 1.45 #endif
1434 root 1.118 #if EV_USE_EPOLL
1435 root 1.130 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1436 root 1.118 #endif
1437 root 1.154 #if EV_USE_INOTIFY
1438     infy_fork (EV_A);
1439     #endif
1440 root 1.70
1441 root 1.207 if (ev_is_active (&pipeev))
1442 root 1.70 {
1443 root 1.207 /* this "locks" the handlers against writing to the pipe */
1444 root 1.212 /* while we modify the fd vars */
1445     gotsig = 1;
1446     #if EV_ASYNC_ENABLE
1447     gotasync = 1;
1448     #endif
1449 root 1.70
1450     ev_ref (EV_A);
1451 root 1.207 ev_io_stop (EV_A_ &pipeev);
1452 root 1.220
1453     #if EV_USE_EVENTFD
1454     if (evfd >= 0)
1455     close (evfd);
1456     #endif
1457    
1458     if (evpipe [0] >= 0)
1459     {
1460     close (evpipe [0]);
1461     close (evpipe [1]);
1462     }
1463 root 1.207
1464     evpipe_init (EV_A);
1465 root 1.208 /* now iterate over everything, in case we missed something */
1466     pipecb (EV_A_ &pipeev, EV_READ);
1467 root 1.70 }
1468    
1469     postfork = 0;
1470 root 1.1 }
1471    
1472 root 1.55 #if EV_MULTIPLICITY
1473 root 1.250
1474 root 1.54 struct ev_loop *
1475 root 1.108 ev_loop_new (unsigned int flags)
1476 root 1.54 {
1477 root 1.69 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1478    
1479     memset (loop, 0, sizeof (struct ev_loop));
1480 root 1.54
1481 root 1.108 loop_init (EV_A_ flags);
1482 root 1.56
1483 root 1.130 if (ev_backend (EV_A))
1484 root 1.55 return loop;
1485 root 1.54
1486 root 1.55 return 0;
1487 root 1.54 }
1488    
1489     void
1490 root 1.56 ev_loop_destroy (EV_P)
1491 root 1.54 {
1492 root 1.56 loop_destroy (EV_A);
1493 root 1.69 ev_free (loop);
1494 root 1.54 }
1495    
1496 root 1.56 void
1497     ev_loop_fork (EV_P)
1498     {
1499 root 1.205 postfork = 1; /* must be in line with ev_default_fork */
1500 root 1.56 }
1501 root 1.248
1502     #if EV_VERIFY
1503 root 1.258 static void noinline
1504 root 1.251 verify_watcher (EV_P_ W w)
1505     {
1506     assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1507    
1508     if (w->pending)
1509     assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1510     }
1511    
1512     static void noinline
1513     verify_heap (EV_P_ ANHE *heap, int N)
1514     {
1515     int i;
1516    
1517     for (i = HEAP0; i < N + HEAP0; ++i)
1518     {
1519     assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1520     assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1521     assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1522    
1523     verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1524     }
1525     }
1526    
1527     static void noinline
1528     array_verify (EV_P_ W *ws, int cnt)
1529 root 1.248 {
1530     while (cnt--)
1531 root 1.251 {
1532     assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1533     verify_watcher (EV_A_ ws [cnt]);
1534     }
1535 root 1.248 }
1536 root 1.250 #endif
1537 root 1.248
1538 root 1.250 void
1539 root 1.248 ev_loop_verify (EV_P)
1540     {
1541 root 1.250 #if EV_VERIFY
1542 root 1.248 int i;
1543 root 1.251 WL w;
1544    
1545     assert (activecnt >= -1);
1546    
1547     assert (fdchangemax >= fdchangecnt);
1548     for (i = 0; i < fdchangecnt; ++i)
1549     assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1550    
1551     assert (anfdmax >= 0);
1552     for (i = 0; i < anfdmax; ++i)
1553     for (w = anfds [i].head; w; w = w->next)
1554     {
1555     verify_watcher (EV_A_ (W)w);
1556     assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1557     assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1558     }
1559    
1560     assert (timermax >= timercnt);
1561     verify_heap (EV_A_ timers, timercnt);
1562 root 1.248
1563     #if EV_PERIODIC_ENABLE
1564 root 1.251 assert (periodicmax >= periodiccnt);
1565     verify_heap (EV_A_ periodics, periodiccnt);
1566 root 1.248 #endif
1567    
1568 root 1.251 for (i = NUMPRI; i--; )
1569     {
1570     assert (pendingmax [i] >= pendingcnt [i]);
1571 root 1.248 #if EV_IDLE_ENABLE
1572 root 1.252 assert (idleall >= 0);
1573 root 1.251 assert (idlemax [i] >= idlecnt [i]);
1574     array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1575 root 1.248 #endif
1576 root 1.251 }
1577    
1578 root 1.248 #if EV_FORK_ENABLE
1579 root 1.251 assert (forkmax >= forkcnt);
1580     array_verify (EV_A_ (W *)forks, forkcnt);
1581 root 1.248 #endif
1582 root 1.251
1583 root 1.250 #if EV_ASYNC_ENABLE
1584 root 1.251 assert (asyncmax >= asynccnt);
1585     array_verify (EV_A_ (W *)asyncs, asynccnt);
1586 root 1.250 #endif
1587 root 1.251
1588     assert (preparemax >= preparecnt);
1589     array_verify (EV_A_ (W *)prepares, preparecnt);
1590    
1591     assert (checkmax >= checkcnt);
1592     array_verify (EV_A_ (W *)checks, checkcnt);
1593    
1594     # if 0
1595     for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1596     for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1597     # endif
1598 root 1.248 #endif
1599     }
1600    
1601 root 1.250 #endif /* multiplicity */
1602 root 1.56
1603     #if EV_MULTIPLICITY
1604     struct ev_loop *
1605 root 1.125 ev_default_loop_init (unsigned int flags)
1606 root 1.54 #else
1607     int
1608 root 1.116 ev_default_loop (unsigned int flags)
1609 root 1.56 #endif
1610 root 1.54 {
1611 root 1.116 if (!ev_default_loop_ptr)
1612 root 1.56 {
1613     #if EV_MULTIPLICITY
1614 root 1.116 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1615 root 1.56 #else
1616 ayin 1.117 ev_default_loop_ptr = 1;
1617 root 1.54 #endif
1618    
1619 root 1.110 loop_init (EV_A_ flags);
1620 root 1.56
1621 root 1.130 if (ev_backend (EV_A))
1622 root 1.56 {
1623 root 1.103 #ifndef _WIN32
1624 root 1.56 ev_signal_init (&childev, childcb, SIGCHLD);
1625     ev_set_priority (&childev, EV_MAXPRI);
1626     ev_signal_start (EV_A_ &childev);
1627     ev_unref (EV_A); /* child watcher should not keep loop alive */
1628     #endif
1629     }
1630     else
1631 root 1.116 ev_default_loop_ptr = 0;
1632 root 1.56 }
1633 root 1.8
1634 root 1.116 return ev_default_loop_ptr;
1635 root 1.1 }
1636    
1637 root 1.24 void
1638 root 1.56 ev_default_destroy (void)
1639 root 1.1 {
1640 root 1.57 #if EV_MULTIPLICITY
1641 root 1.116 struct ev_loop *loop = ev_default_loop_ptr;
1642 root 1.57 #endif
1643 root 1.56
1644 root 1.266 ev_default_loop_ptr = 0;
1645    
1646 root 1.103 #ifndef _WIN32
1647 root 1.56 ev_ref (EV_A); /* child watcher */
1648     ev_signal_stop (EV_A_ &childev);
1649 root 1.71 #endif
1650 root 1.56
1651     loop_destroy (EV_A);
1652 root 1.1 }
1653    
1654 root 1.24 void
1655 root 1.60 ev_default_fork (void)
1656 root 1.1 {
1657 root 1.60 #if EV_MULTIPLICITY
1658 root 1.116 struct ev_loop *loop = ev_default_loop_ptr;
1659 root 1.60 #endif
1660    
1661 root 1.130 if (backend)
1662 root 1.205 postfork = 1; /* must be in line with ev_loop_fork */
1663 root 1.1 }
1664    
1665 root 1.8 /*****************************************************************************/
1666    
1667 root 1.168 void
1668     ev_invoke (EV_P_ void *w, int revents)
1669     {
1670     EV_CB_INVOKE ((W)w, revents);
1671     }
1672    
1673 root 1.140 void inline_speed
1674 root 1.51 call_pending (EV_P)
1675 root 1.1 {
1676 root 1.42 int pri;
1677    
1678     for (pri = NUMPRI; pri--; )
1679     while (pendingcnt [pri])
1680     {
1681     ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1682 root 1.1
1683 root 1.122 if (expect_true (p->w))
1684 root 1.42 {
1685 root 1.151 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1686 root 1.139
1687 root 1.42 p->w->pending = 0;
1688 root 1.82 EV_CB_INVOKE (p->w, p->events);
1689 root 1.250 EV_FREQUENT_CHECK;
1690 root 1.42 }
1691     }
1692 root 1.1 }
1693    
1694 root 1.234 #if EV_IDLE_ENABLE
1695     void inline_size
1696     idle_reify (EV_P)
1697     {
1698     if (expect_false (idleall))
1699     {
1700     int pri;
1701    
1702     for (pri = NUMPRI; pri--; )
1703     {
1704     if (pendingcnt [pri])
1705     break;
1706    
1707     if (idlecnt [pri])
1708     {
1709     queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1710     break;
1711     }
1712     }
1713     }
1714     }
1715     #endif
1716    
1717 root 1.140 void inline_size
1718 root 1.51 timers_reify (EV_P)
1719 root 1.1 {
1720 root 1.248 EV_FREQUENT_CHECK;
1721    
1722 root 1.244 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1723 root 1.1 {
1724 root 1.241 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1725 root 1.1
1726 root 1.202 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1727 root 1.61
1728 root 1.4 /* first reschedule or stop timer */
1729 root 1.1 if (w->repeat)
1730     {
1731 root 1.228 ev_at (w) += w->repeat;
1732     if (ev_at (w) < mn_now)
1733     ev_at (w) = mn_now;
1734 root 1.90
1735 root 1.243 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1736    
1737 root 1.248 ANHE_at_cache (timers [HEAP0]);
1738 root 1.235 downheap (timers, timercnt, HEAP0);
1739 root 1.12 }
1740     else
1741 root 1.51 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1742 root 1.30
1743 root 1.248 EV_FREQUENT_CHECK;
1744 root 1.78 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1745 root 1.12 }
1746     }
1747 root 1.4
1748 root 1.140 #if EV_PERIODIC_ENABLE
1749     void inline_size
1750 root 1.51 periodics_reify (EV_P)
1751 root 1.12 {
1752 root 1.248 EV_FREQUENT_CHECK;
1753 root 1.250
1754 root 1.244 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1755 root 1.12 {
1756 root 1.241 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1757 root 1.1
1758 root 1.151 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1759 root 1.61
1760 root 1.12 /* first reschedule or stop timer */
1761 root 1.77 if (w->reschedule_cb)
1762     {
1763 root 1.244 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1764 root 1.243
1765 root 1.244 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1766 root 1.243
1767 root 1.248 ANHE_at_cache (periodics [HEAP0]);
1768 root 1.242 downheap (periodics, periodiccnt, HEAP0);
1769 root 1.77 }
1770     else if (w->interval)
1771 root 1.12 {
1772 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1773 root 1.246 /* if next trigger time is not sufficiently in the future, put it there */
1774     /* this might happen because of floating point inexactness */
1775     if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1776     {
1777     ev_at (w) += w->interval;
1778 root 1.243
1779 root 1.246 /* if interval is unreasonably low we might still have a time in the past */
1780     /* so correct this. this will make the periodic very inexact, but the user */
1781     /* has effectively asked to get triggered more often than possible */
1782     if (ev_at (w) < ev_rt_now)
1783     ev_at (w) = ev_rt_now;
1784     }
1785 root 1.243
1786 root 1.248 ANHE_at_cache (periodics [HEAP0]);
1787 root 1.235 downheap (periodics, periodiccnt, HEAP0);
1788 root 1.1 }
1789     else
1790 root 1.51 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1791 root 1.12
1792 root 1.248 EV_FREQUENT_CHECK;
1793 root 1.78 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1794 root 1.12 }
1795     }
1796    
1797 root 1.140 static void noinline
1798 root 1.54 periodics_reschedule (EV_P)
1799 root 1.12 {
1800     int i;
1801    
1802 root 1.13 /* adjust periodics after time jump */
1803 root 1.241 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1804 root 1.12 {
1805 root 1.241 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1806 root 1.12
1807 root 1.77 if (w->reschedule_cb)
1808 root 1.228 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1809 root 1.77 else if (w->interval)
1810 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1811 root 1.242
1812 root 1.248 ANHE_at_cache (periodics [i]);
1813 root 1.77 }
1814 root 1.12
1815 root 1.248 reheap (periodics, periodiccnt);
1816 root 1.1 }
1817 root 1.93 #endif
1818 root 1.1
1819 root 1.178 void inline_speed
1820     time_update (EV_P_ ev_tstamp max_block)
1821 root 1.4 {
1822     int i;
1823 root 1.12
1824 root 1.40 #if EV_USE_MONOTONIC
1825     if (expect_true (have_monotonic))
1826     {
1827 root 1.178 ev_tstamp odiff = rtmn_diff;
1828    
1829     mn_now = get_clock ();
1830    
1831     /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1832     /* interpolate in the meantime */
1833     if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1834 root 1.40 {
1835 root 1.178 ev_rt_now = rtmn_diff + mn_now;
1836     return;
1837     }
1838    
1839     now_floor = mn_now;
1840     ev_rt_now = ev_time ();
1841 root 1.4
1842 root 1.178 /* loop a few times, before making important decisions.
1843     * on the choice of "4": one iteration isn't enough,
1844     * in case we get preempted during the calls to
1845     * ev_time and get_clock. a second call is almost guaranteed
1846     * to succeed in that case, though. and looping a few more times
1847     * doesn't hurt either as we only do this on time-jumps or
1848     * in the unlikely event of having been preempted here.
1849     */
1850     for (i = 4; --i; )
1851     {
1852     rtmn_diff = ev_rt_now - mn_now;
1853 root 1.4
1854 root 1.234 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1855 root 1.178 return; /* all is well */
1856 root 1.4
1857 root 1.178 ev_rt_now = ev_time ();
1858     mn_now = get_clock ();
1859     now_floor = mn_now;
1860     }
1861 root 1.4
1862 root 1.140 # if EV_PERIODIC_ENABLE
1863 root 1.178 periodics_reschedule (EV_A);
1864 root 1.93 # endif
1865 root 1.178 /* no timer adjustment, as the monotonic clock doesn't jump */
1866     /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1867 root 1.4 }
1868     else
1869 root 1.40 #endif
1870 root 1.4 {
1871 root 1.85 ev_rt_now = ev_time ();
1872 root 1.40
1873 root 1.178 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1874 root 1.13 {
1875 root 1.140 #if EV_PERIODIC_ENABLE
1876 root 1.54 periodics_reschedule (EV_A);
1877 root 1.93 #endif
1878 root 1.157 /* adjust timers. this is easy, as the offset is the same for all of them */
1879 root 1.241 for (i = 0; i < timercnt; ++i)
1880     {
1881     ANHE *he = timers + i + HEAP0;
1882     ANHE_w (*he)->at += ev_rt_now - mn_now;
1883 root 1.248 ANHE_at_cache (*he);
1884 root 1.241 }
1885 root 1.13 }
1886 root 1.4
1887 root 1.85 mn_now = ev_rt_now;
1888 root 1.4 }
1889     }
1890    
1891 root 1.51 void
1892     ev_ref (EV_P)
1893     {
1894     ++activecnt;
1895     }
1896 root 1.1
1897 root 1.51 void
1898     ev_unref (EV_P)
1899     {
1900     --activecnt;
1901     }
1902    
1903 root 1.260 void
1904     ev_now_update (EV_P)
1905     {
1906     time_update (EV_A_ 1e100);
1907     }
1908    
1909 root 1.51 static int loop_done;
1910    
1911     void
1912     ev_loop (EV_P_ int flags)
1913 root 1.1 {
1914 root 1.219 loop_done = EVUNLOOP_CANCEL;
1915 root 1.1
1916 root 1.158 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1917    
1918 root 1.161 do
1919 root 1.9 {
1920 root 1.250 #if EV_VERIFY >= 2
1921     ev_loop_verify (EV_A);
1922     #endif
1923    
1924 root 1.158 #ifndef _WIN32
1925     if (expect_false (curpid)) /* penalise the forking check even more */
1926     if (expect_false (getpid () != curpid))
1927     {
1928     curpid = getpid ();
1929     postfork = 1;
1930     }
1931     #endif
1932    
1933 root 1.157 #if EV_FORK_ENABLE
1934     /* we might have forked, so queue fork handlers */
1935     if (expect_false (postfork))
1936     if (forkcnt)
1937     {
1938     queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1939     call_pending (EV_A);
1940     }
1941     #endif
1942 root 1.147
1943 root 1.170 /* queue prepare watchers (and execute them) */
1944 root 1.40 if (expect_false (preparecnt))
1945 root 1.20 {
1946 root 1.51 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1947     call_pending (EV_A);
1948 root 1.20 }
1949 root 1.9
1950 root 1.159 if (expect_false (!activecnt))
1951     break;
1952    
1953 root 1.70 /* we might have forked, so reify kernel state if necessary */
1954     if (expect_false (postfork))
1955     loop_fork (EV_A);
1956    
1957 root 1.1 /* update fd-related kernel structures */
1958 root 1.51 fd_reify (EV_A);
1959 root 1.1
1960     /* calculate blocking time */
1961 root 1.135 {
1962 root 1.193 ev_tstamp waittime = 0.;
1963     ev_tstamp sleeptime = 0.;
1964 root 1.12
1965 root 1.193 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1966 root 1.135 {
1967     /* update time to cancel out callback processing overhead */
1968 root 1.178 time_update (EV_A_ 1e100);
1969 root 1.135
1970 root 1.193 waittime = MAX_BLOCKTIME;
1971 root 1.135
1972     if (timercnt)
1973     {
1974 root 1.241 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1975 root 1.193 if (waittime > to) waittime = to;
1976 root 1.135 }
1977 root 1.4
1978 root 1.140 #if EV_PERIODIC_ENABLE
1979 root 1.135 if (periodiccnt)
1980     {
1981 root 1.241 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1982 root 1.193 if (waittime > to) waittime = to;
1983 root 1.135 }
1984 root 1.93 #endif
1985 root 1.4
1986 root 1.193 if (expect_false (waittime < timeout_blocktime))
1987     waittime = timeout_blocktime;
1988    
1989     sleeptime = waittime - backend_fudge;
1990    
1991     if (expect_true (sleeptime > io_blocktime))
1992     sleeptime = io_blocktime;
1993    
1994     if (sleeptime)
1995     {
1996     ev_sleep (sleeptime);
1997     waittime -= sleeptime;
1998     }
1999 root 1.135 }
2000 root 1.1
2001 root 1.162 ++loop_count;
2002 root 1.193 backend_poll (EV_A_ waittime);
2003 root 1.178
2004     /* update ev_rt_now, do magic */
2005 root 1.193 time_update (EV_A_ waittime + sleeptime);
2006 root 1.135 }
2007 root 1.1
2008 root 1.9 /* queue pending timers and reschedule them */
2009 root 1.51 timers_reify (EV_A); /* relative timers called last */
2010 root 1.140 #if EV_PERIODIC_ENABLE
2011 root 1.51 periodics_reify (EV_A); /* absolute timers called first */
2012 root 1.93 #endif
2013 root 1.1
2014 root 1.164 #if EV_IDLE_ENABLE
2015 root 1.137 /* queue idle watchers unless other events are pending */
2016 root 1.164 idle_reify (EV_A);
2017     #endif
2018 root 1.9
2019 root 1.20 /* queue check watchers, to be executed first */
2020 root 1.123 if (expect_false (checkcnt))
2021 root 1.51 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2022 root 1.9
2023 root 1.51 call_pending (EV_A);
2024 root 1.1 }
2025 root 1.219 while (expect_true (
2026     activecnt
2027     && !loop_done
2028     && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2029     ));
2030 root 1.13
2031 root 1.135 if (loop_done == EVUNLOOP_ONE)
2032     loop_done = EVUNLOOP_CANCEL;
2033 root 1.51 }
2034    
2035     void
2036     ev_unloop (EV_P_ int how)
2037     {
2038     loop_done = how;
2039 root 1.1 }
2040    
2041 root 1.8 /*****************************************************************************/
2042    
2043 root 1.140 void inline_size
2044 root 1.10 wlist_add (WL *head, WL elem)
2045 root 1.1 {
2046     elem->next = *head;
2047     *head = elem;
2048     }
2049    
2050 root 1.140 void inline_size
2051 root 1.10 wlist_del (WL *head, WL elem)
2052 root 1.1 {
2053     while (*head)
2054     {
2055     if (*head == elem)
2056     {
2057     *head = elem->next;
2058     return;
2059     }
2060    
2061     head = &(*head)->next;
2062     }
2063     }
2064    
2065 root 1.140 void inline_speed
2066 root 1.166 clear_pending (EV_P_ W w)
2067 root 1.16 {
2068     if (w->pending)
2069     {
2070 root 1.42 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2071 root 1.16 w->pending = 0;
2072     }
2073     }
2074    
2075 root 1.167 int
2076     ev_clear_pending (EV_P_ void *w)
2077 root 1.166 {
2078     W w_ = (W)w;
2079     int pending = w_->pending;
2080    
2081 root 1.172 if (expect_true (pending))
2082     {
2083     ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2084     w_->pending = 0;
2085     p->w = 0;
2086     return p->events;
2087     }
2088     else
2089 root 1.167 return 0;
2090 root 1.166 }
2091    
2092 root 1.164 void inline_size
2093     pri_adjust (EV_P_ W w)
2094     {
2095     int pri = w->priority;
2096     pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2097     pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2098     w->priority = pri;
2099     }
2100    
2101 root 1.140 void inline_speed
2102 root 1.51 ev_start (EV_P_ W w, int active)
2103 root 1.1 {
2104 root 1.164 pri_adjust (EV_A_ w);
2105 root 1.1 w->active = active;
2106 root 1.51 ev_ref (EV_A);
2107 root 1.1 }
2108    
2109 root 1.140 void inline_size
2110 root 1.51 ev_stop (EV_P_ W w)
2111 root 1.1 {
2112 root 1.51 ev_unref (EV_A);
2113 root 1.1 w->active = 0;
2114     }
2115    
2116 root 1.8 /*****************************************************************************/
2117    
2118 root 1.171 void noinline
2119 root 1.136 ev_io_start (EV_P_ ev_io *w)
2120 root 1.1 {
2121 root 1.37 int fd = w->fd;
2122    
2123 root 1.123 if (expect_false (ev_is_active (w)))
2124 root 1.1 return;
2125    
2126 root 1.33 assert (("ev_io_start called with negative fd", fd >= 0));
2127 root 1.265 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2128 root 1.33
2129 root 1.248 EV_FREQUENT_CHECK;
2130    
2131 root 1.51 ev_start (EV_A_ (W)w, 1);
2132 root 1.265 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2133 root 1.182 wlist_add (&anfds[fd].head, (WL)w);
2134 root 1.1
2135 root 1.184 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2136     w->events &= ~EV_IOFDSET;
2137 root 1.248
2138     EV_FREQUENT_CHECK;
2139 root 1.1 }
2140    
2141 root 1.171 void noinline
2142 root 1.136 ev_io_stop (EV_P_ ev_io *w)
2143 root 1.1 {
2144 root 1.166 clear_pending (EV_A_ (W)w);
2145 root 1.123 if (expect_false (!ev_is_active (w)))
2146 root 1.1 return;
2147    
2148 root 1.242 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2149 root 1.89
2150 root 1.248 EV_FREQUENT_CHECK;
2151    
2152 root 1.182 wlist_del (&anfds[w->fd].head, (WL)w);
2153 root 1.51 ev_stop (EV_A_ (W)w);
2154 root 1.1
2155 root 1.184 fd_change (EV_A_ w->fd, 1);
2156 root 1.248
2157     EV_FREQUENT_CHECK;
2158 root 1.1 }
2159    
2160 root 1.171 void noinline
2161 root 1.136 ev_timer_start (EV_P_ ev_timer *w)
2162 root 1.1 {
2163 root 1.123 if (expect_false (ev_is_active (w)))
2164 root 1.1 return;
2165    
2166 root 1.228 ev_at (w) += mn_now;
2167 root 1.12
2168 root 1.33 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2169 root 1.13
2170 root 1.248 EV_FREQUENT_CHECK;
2171    
2172     ++timercnt;
2173     ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2174 root 1.241 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2175     ANHE_w (timers [ev_active (w)]) = (WT)w;
2176 root 1.248 ANHE_at_cache (timers [ev_active (w)]);
2177 root 1.235 upheap (timers, ev_active (w));
2178 root 1.62
2179 root 1.248 EV_FREQUENT_CHECK;
2180    
2181 root 1.242 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2182 root 1.12 }
2183    
2184 root 1.171 void noinline
2185 root 1.136 ev_timer_stop (EV_P_ ev_timer *w)
2186 root 1.12 {
2187 root 1.166 clear_pending (EV_A_ (W)w);
2188 root 1.123 if (expect_false (!ev_is_active (w)))
2189 root 1.12 return;
2190    
2191 root 1.248 EV_FREQUENT_CHECK;
2192    
2193 root 1.230 {
2194     int active = ev_active (w);
2195 root 1.62
2196 root 1.241 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2197 root 1.151
2198 root 1.248 --timercnt;
2199    
2200     if (expect_true (active < timercnt + HEAP0))
2201 root 1.151 {
2202 root 1.248 timers [active] = timers [timercnt + HEAP0];
2203 root 1.181 adjustheap (timers, timercnt, active);
2204 root 1.151 }
2205 root 1.248 }
2206 root 1.228
2207 root 1.248 EV_FREQUENT_CHECK;
2208 root 1.4
2209 root 1.228 ev_at (w) -= mn_now;
2210 root 1.14
2211 root 1.51 ev_stop (EV_A_ (W)w);
2212 root 1.12 }
2213 root 1.4
2214 root 1.171 void noinline
2215 root 1.136 ev_timer_again (EV_P_ ev_timer *w)
2216 root 1.14 {
2217 root 1.248 EV_FREQUENT_CHECK;
2218    
2219 root 1.14 if (ev_is_active (w))
2220     {
2221     if (w->repeat)
2222 root 1.99 {
2223 root 1.228 ev_at (w) = mn_now + w->repeat;
2224 root 1.248 ANHE_at_cache (timers [ev_active (w)]);
2225 root 1.230 adjustheap (timers, timercnt, ev_active (w));
2226 root 1.99 }
2227 root 1.14 else
2228 root 1.51 ev_timer_stop (EV_A_ w);
2229 root 1.14 }
2230     else if (w->repeat)
2231 root 1.112 {
2232 root 1.229 ev_at (w) = w->repeat;
2233 root 1.112 ev_timer_start (EV_A_ w);
2234     }
2235 root 1.248
2236     EV_FREQUENT_CHECK;
2237 root 1.14 }
2238    
2239 root 1.140 #if EV_PERIODIC_ENABLE
2240 root 1.171 void noinline
2241 root 1.136 ev_periodic_start (EV_P_ ev_periodic *w)
2242 root 1.12 {
2243 root 1.123 if (expect_false (ev_is_active (w)))
2244 root 1.12 return;
2245 root 1.1
2246 root 1.77 if (w->reschedule_cb)
2247 root 1.228 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2248 root 1.77 else if (w->interval)
2249     {
2250     assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
2251     /* this formula differs from the one in periodic_reify because we do not always round up */
2252 root 1.228 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2253 root 1.77 }
2254 root 1.173 else
2255 root 1.228 ev_at (w) = w->offset;
2256 root 1.12
2257 root 1.248 EV_FREQUENT_CHECK;
2258    
2259     ++periodiccnt;
2260     ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2261 root 1.241 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2262     ANHE_w (periodics [ev_active (w)]) = (WT)w;
2263 root 1.248 ANHE_at_cache (periodics [ev_active (w)]);
2264 root 1.235 upheap (periodics, ev_active (w));
2265 root 1.62
2266 root 1.248 EV_FREQUENT_CHECK;
2267    
2268 root 1.241 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2269 root 1.1 }
2270    
2271 root 1.171 void noinline
2272 root 1.136 ev_periodic_stop (EV_P_ ev_periodic *w)
2273 root 1.1 {
2274 root 1.166 clear_pending (EV_A_ (W)w);
2275 root 1.123 if (expect_false (!ev_is_active (w)))
2276 root 1.1 return;
2277    
2278 root 1.248 EV_FREQUENT_CHECK;
2279    
2280 root 1.230 {
2281     int active = ev_active (w);
2282 root 1.62
2283 root 1.241 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2284 root 1.151
2285 root 1.248 --periodiccnt;
2286    
2287     if (expect_true (active < periodiccnt + HEAP0))
2288 root 1.151 {
2289 root 1.248 periodics [active] = periodics [periodiccnt + HEAP0];
2290 root 1.181 adjustheap (periodics, periodiccnt, active);
2291 root 1.151 }
2292 root 1.248 }
2293 root 1.228
2294 root 1.248 EV_FREQUENT_CHECK;
2295 root 1.2
2296 root 1.51 ev_stop (EV_A_ (W)w);
2297 root 1.1 }
2298    
2299 root 1.171 void noinline
2300 root 1.136 ev_periodic_again (EV_P_ ev_periodic *w)
2301 root 1.77 {
2302 root 1.84 /* TODO: use adjustheap and recalculation */
2303 root 1.77 ev_periodic_stop (EV_A_ w);
2304     ev_periodic_start (EV_A_ w);
2305     }
2306 root 1.93 #endif
2307 root 1.77
2308 root 1.56 #ifndef SA_RESTART
2309     # define SA_RESTART 0
2310     #endif
2311    
2312 root 1.171 void noinline
2313 root 1.136 ev_signal_start (EV_P_ ev_signal *w)
2314 root 1.56 {
2315     #if EV_MULTIPLICITY
2316 root 1.116 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2317 root 1.56 #endif
2318 root 1.123 if (expect_false (ev_is_active (w)))
2319 root 1.56 return;
2320    
2321     assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2322    
2323 root 1.207 evpipe_init (EV_A);
2324    
2325 root 1.248 EV_FREQUENT_CHECK;
2326    
2327 root 1.180 {
2328     #ifndef _WIN32
2329     sigset_t full, prev;
2330     sigfillset (&full);
2331     sigprocmask (SIG_SETMASK, &full, &prev);
2332     #endif
2333    
2334 root 1.265 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2335 root 1.180
2336     #ifndef _WIN32
2337     sigprocmask (SIG_SETMASK, &prev, 0);
2338     #endif
2339     }
2340    
2341 root 1.56 ev_start (EV_A_ (W)w, 1);
2342 root 1.182 wlist_add (&signals [w->signum - 1].head, (WL)w);
2343 root 1.56
2344 root 1.63 if (!((WL)w)->next)
2345 root 1.56 {
2346 root 1.103 #if _WIN32
2347 root 1.218 signal (w->signum, ev_sighandler);
2348 root 1.67 #else
2349 root 1.56 struct sigaction sa;
2350 root 1.218 sa.sa_handler = ev_sighandler;
2351 root 1.56 sigfillset (&sa.sa_mask);
2352     sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2353     sigaction (w->signum, &sa, 0);
2354 root 1.67 #endif
2355 root 1.56 }
2356 root 1.248
2357     EV_FREQUENT_CHECK;
2358 root 1.56 }
2359    
2360 root 1.171 void noinline
2361 root 1.136 ev_signal_stop (EV_P_ ev_signal *w)
2362 root 1.56 {
2363 root 1.166 clear_pending (EV_A_ (W)w);
2364 root 1.123 if (expect_false (!ev_is_active (w)))
2365 root 1.56 return;
2366    
2367 root 1.248 EV_FREQUENT_CHECK;
2368    
2369 root 1.182 wlist_del (&signals [w->signum - 1].head, (WL)w);
2370 root 1.56 ev_stop (EV_A_ (W)w);
2371    
2372     if (!signals [w->signum - 1].head)
2373     signal (w->signum, SIG_DFL);
2374 root 1.248
2375     EV_FREQUENT_CHECK;
2376 root 1.56 }
2377    
2378 root 1.28 void
2379 root 1.136 ev_child_start (EV_P_ ev_child *w)
2380 root 1.22 {
2381 root 1.56 #if EV_MULTIPLICITY
2382 root 1.116 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2383 root 1.56 #endif
2384 root 1.123 if (expect_false (ev_is_active (w)))
2385 root 1.22 return;
2386    
2387 root 1.248 EV_FREQUENT_CHECK;
2388    
2389 root 1.51 ev_start (EV_A_ (W)w, 1);
2390 root 1.182 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2391 root 1.248
2392     EV_FREQUENT_CHECK;
2393 root 1.22 }
2394    
2395 root 1.28 void
2396 root 1.136 ev_child_stop (EV_P_ ev_child *w)
2397 root 1.22 {
2398 root 1.166 clear_pending (EV_A_ (W)w);
2399 root 1.123 if (expect_false (!ev_is_active (w)))
2400 root 1.22 return;
2401    
2402 root 1.248 EV_FREQUENT_CHECK;
2403    
2404 root 1.182 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2405 root 1.51 ev_stop (EV_A_ (W)w);
2406 root 1.248
2407     EV_FREQUENT_CHECK;
2408 root 1.22 }
2409    
2410 root 1.140 #if EV_STAT_ENABLE
2411    
2412     # ifdef _WIN32
2413 root 1.146 # undef lstat
2414     # define lstat(a,b) _stati64 (a,b)
2415 root 1.140 # endif
2416    
2417 root 1.143 #define DEF_STAT_INTERVAL 5.0074891
2418     #define MIN_STAT_INTERVAL 0.1074891
2419    
2420 root 1.157 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2421 root 1.152
2422     #if EV_USE_INOTIFY
2423 root 1.153 # define EV_INOTIFY_BUFSIZE 8192
2424 root 1.152
2425     static void noinline
2426     infy_add (EV_P_ ev_stat *w)
2427     {
2428     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);
2429    
2430     if (w->wd < 0)
2431     {
2432     ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2433    
2434     /* monitor some parent directory for speedup hints */
2435 root 1.233 /* note that exceeding the hardcoded limit is not a correctness issue, */
2436     /* but an efficiency issue only */
2437 root 1.153 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2438 root 1.152 {
2439 root 1.153 char path [4096];
2440 root 1.152 strcpy (path, w->path);
2441    
2442     do
2443     {
2444     int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2445     | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2446    
2447     char *pend = strrchr (path, '/');
2448    
2449     if (!pend)
2450     break; /* whoops, no '/', complain to your admin */
2451    
2452     *pend = 0;
2453 root 1.153 w->wd = inotify_add_watch (fs_fd, path, mask);
2454 root 1.152 }
2455     while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2456     }
2457     }
2458     else
2459     ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2460    
2461     if (w->wd >= 0)
2462     wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2463     }
2464    
2465     static void noinline
2466     infy_del (EV_P_ ev_stat *w)
2467     {
2468     int slot;
2469     int wd = w->wd;
2470    
2471     if (wd < 0)
2472     return;
2473    
2474     w->wd = -2;
2475     slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2476     wlist_del (&fs_hash [slot].head, (WL)w);
2477    
2478     /* remove this watcher, if others are watching it, they will rearm */
2479     inotify_rm_watch (fs_fd, wd);
2480     }
2481    
2482     static void noinline
2483     infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2484     {
2485     if (slot < 0)
2486 root 1.264 /* overflow, need to check for all hash slots */
2487 root 1.152 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2488     infy_wd (EV_A_ slot, wd, ev);
2489     else
2490     {
2491     WL w_;
2492    
2493     for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2494     {
2495     ev_stat *w = (ev_stat *)w_;
2496     w_ = w_->next; /* lets us remove this watcher and all before it */
2497    
2498     if (w->wd == wd || wd == -1)
2499     {
2500     if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2501     {
2502     w->wd = -1;
2503     infy_add (EV_A_ w); /* re-add, no matter what */
2504     }
2505    
2506 root 1.153 stat_timer_cb (EV_A_ &w->timer, 0);
2507 root 1.152 }
2508     }
2509     }
2510     }
2511    
2512     static void
2513     infy_cb (EV_P_ ev_io *w, int revents)
2514     {
2515     char buf [EV_INOTIFY_BUFSIZE];
2516     struct inotify_event *ev = (struct inotify_event *)buf;
2517     int ofs;
2518     int len = read (fs_fd, buf, sizeof (buf));
2519    
2520     for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2521     infy_wd (EV_A_ ev->wd, ev->wd, ev);
2522     }
2523    
2524     void inline_size
2525     infy_init (EV_P)
2526     {
2527     if (fs_fd != -2)
2528     return;
2529    
2530 root 1.264 /* kernels < 2.6.25 are borked
2531     * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2532     */
2533     {
2534     struct utsname buf;
2535     int major, minor, micro;
2536    
2537     fs_fd = -1;
2538    
2539     if (uname (&buf))
2540     return;
2541    
2542     if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2543     return;
2544    
2545     if (major < 2
2546     || (major == 2 && minor < 6)
2547     || (major == 2 && minor == 6 && micro < 25))
2548     return;
2549     }
2550    
2551 root 1.152 fs_fd = inotify_init ();
2552    
2553     if (fs_fd >= 0)
2554     {
2555     ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2556     ev_set_priority (&fs_w, EV_MAXPRI);
2557     ev_io_start (EV_A_ &fs_w);
2558     }
2559     }
2560    
2561 root 1.154 void inline_size
2562     infy_fork (EV_P)
2563     {
2564     int slot;
2565    
2566     if (fs_fd < 0)
2567     return;
2568    
2569     close (fs_fd);
2570     fs_fd = inotify_init ();
2571    
2572     for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2573     {
2574     WL w_ = fs_hash [slot].head;
2575     fs_hash [slot].head = 0;
2576    
2577     while (w_)
2578     {
2579     ev_stat *w = (ev_stat *)w_;
2580     w_ = w_->next; /* lets us add this watcher */
2581    
2582     w->wd = -1;
2583    
2584     if (fs_fd >= 0)
2585     infy_add (EV_A_ w); /* re-add, no matter what */
2586     else
2587     ev_timer_start (EV_A_ &w->timer);
2588     }
2589     }
2590     }
2591    
2592 root 1.152 #endif
2593    
2594 root 1.255 #ifdef _WIN32
2595     # define EV_LSTAT(p,b) _stati64 (p, b)
2596     #else
2597     # define EV_LSTAT(p,b) lstat (p, b)
2598     #endif
2599    
2600 root 1.140 void
2601     ev_stat_stat (EV_P_ ev_stat *w)
2602     {
2603     if (lstat (w->path, &w->attr) < 0)
2604     w->attr.st_nlink = 0;
2605     else if (!w->attr.st_nlink)
2606     w->attr.st_nlink = 1;
2607     }
2608    
2609 root 1.157 static void noinline
2610 root 1.140 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2611     {
2612     ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2613    
2614     /* we copy this here each the time so that */
2615     /* prev has the old value when the callback gets invoked */
2616     w->prev = w->attr;
2617     ev_stat_stat (EV_A_ w);
2618    
2619 root 1.156 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2620     if (
2621     w->prev.st_dev != w->attr.st_dev
2622     || w->prev.st_ino != w->attr.st_ino
2623     || w->prev.st_mode != w->attr.st_mode
2624     || w->prev.st_nlink != w->attr.st_nlink
2625     || w->prev.st_uid != w->attr.st_uid
2626     || w->prev.st_gid != w->attr.st_gid
2627     || w->prev.st_rdev != w->attr.st_rdev
2628     || w->prev.st_size != w->attr.st_size
2629     || w->prev.st_atime != w->attr.st_atime
2630     || w->prev.st_mtime != w->attr.st_mtime
2631     || w->prev.st_ctime != w->attr.st_ctime
2632     ) {
2633 root 1.152 #if EV_USE_INOTIFY
2634 root 1.264 if (fs_fd >= 0)
2635     {
2636     infy_del (EV_A_ w);
2637     infy_add (EV_A_ w);
2638     ev_stat_stat (EV_A_ w); /* avoid race... */
2639     }
2640 root 1.152 #endif
2641    
2642     ev_feed_event (EV_A_ w, EV_STAT);
2643     }
2644 root 1.140 }
2645    
2646     void
2647     ev_stat_start (EV_P_ ev_stat *w)
2648     {
2649     if (expect_false (ev_is_active (w)))
2650     return;
2651    
2652     /* since we use memcmp, we need to clear any padding data etc. */
2653     memset (&w->prev, 0, sizeof (ev_statdata));
2654     memset (&w->attr, 0, sizeof (ev_statdata));
2655    
2656     ev_stat_stat (EV_A_ w);
2657    
2658 root 1.143 if (w->interval < MIN_STAT_INTERVAL)
2659     w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2660    
2661 root 1.140 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2662     ev_set_priority (&w->timer, ev_priority (w));
2663 root 1.152
2664     #if EV_USE_INOTIFY
2665     infy_init (EV_A);
2666    
2667     if (fs_fd >= 0)
2668     infy_add (EV_A_ w);
2669     else
2670     #endif
2671     ev_timer_start (EV_A_ &w->timer);
2672 root 1.140
2673     ev_start (EV_A_ (W)w, 1);
2674 root 1.248
2675     EV_FREQUENT_CHECK;
2676 root 1.140 }
2677    
2678     void
2679     ev_stat_stop (EV_P_ ev_stat *w)
2680     {
2681 root 1.166 clear_pending (EV_A_ (W)w);
2682 root 1.140 if (expect_false (!ev_is_active (w)))
2683     return;
2684    
2685 root 1.248 EV_FREQUENT_CHECK;
2686    
2687 root 1.152 #if EV_USE_INOTIFY
2688     infy_del (EV_A_ w);
2689     #endif
2690 root 1.140 ev_timer_stop (EV_A_ &w->timer);
2691    
2692 root 1.134 ev_stop (EV_A_ (W)w);
2693 root 1.248
2694     EV_FREQUENT_CHECK;
2695 root 1.134 }
2696     #endif
2697    
2698 root 1.164 #if EV_IDLE_ENABLE
2699 root 1.144 void
2700     ev_idle_start (EV_P_ ev_idle *w)
2701     {
2702     if (expect_false (ev_is_active (w)))
2703     return;
2704    
2705 root 1.164 pri_adjust (EV_A_ (W)w);
2706    
2707 root 1.248 EV_FREQUENT_CHECK;
2708    
2709 root 1.164 {
2710     int active = ++idlecnt [ABSPRI (w)];
2711    
2712     ++idleall;
2713     ev_start (EV_A_ (W)w, active);
2714    
2715     array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2716     idles [ABSPRI (w)][active - 1] = w;
2717     }
2718 root 1.248
2719     EV_FREQUENT_CHECK;
2720 root 1.144 }
2721    
2722     void
2723     ev_idle_stop (EV_P_ ev_idle *w)
2724     {
2725 root 1.166 clear_pending (EV_A_ (W)w);
2726 root 1.144 if (expect_false (!ev_is_active (w)))
2727     return;
2728    
2729 root 1.248 EV_FREQUENT_CHECK;
2730    
2731 root 1.144 {
2732 root 1.230 int active = ev_active (w);
2733 root 1.164
2734     idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2735 root 1.230 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2736 root 1.164
2737     ev_stop (EV_A_ (W)w);
2738     --idleall;
2739 root 1.144 }
2740 root 1.248
2741     EV_FREQUENT_CHECK;
2742 root 1.144 }
2743 root 1.164 #endif
2744 root 1.144
2745     void
2746     ev_prepare_start (EV_P_ ev_prepare *w)
2747     {
2748     if (expect_false (ev_is_active (w)))
2749     return;
2750    
2751 root 1.248 EV_FREQUENT_CHECK;
2752    
2753 root 1.144 ev_start (EV_A_ (W)w, ++preparecnt);
2754     array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2755     prepares [preparecnt - 1] = w;
2756 root 1.248
2757     EV_FREQUENT_CHECK;
2758 root 1.144 }
2759    
2760     void
2761     ev_prepare_stop (EV_P_ ev_prepare *w)
2762     {
2763 root 1.166 clear_pending (EV_A_ (W)w);
2764 root 1.144 if (expect_false (!ev_is_active (w)))
2765     return;
2766    
2767 root 1.248 EV_FREQUENT_CHECK;
2768    
2769 root 1.144 {
2770 root 1.230 int active = ev_active (w);
2771    
2772 root 1.144 prepares [active - 1] = prepares [--preparecnt];
2773 root 1.230 ev_active (prepares [active - 1]) = active;
2774 root 1.144 }
2775    
2776     ev_stop (EV_A_ (W)w);
2777 root 1.248
2778     EV_FREQUENT_CHECK;
2779 root 1.144 }
2780    
2781     void
2782     ev_check_start (EV_P_ ev_check *w)
2783     {
2784     if (expect_false (ev_is_active (w)))
2785     return;
2786    
2787 root 1.248 EV_FREQUENT_CHECK;
2788    
2789 root 1.144 ev_start (EV_A_ (W)w, ++checkcnt);
2790     array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2791     checks [checkcnt - 1] = w;
2792 root 1.248
2793     EV_FREQUENT_CHECK;
2794 root 1.144 }
2795    
2796     void
2797     ev_check_stop (EV_P_ ev_check *w)
2798     {
2799 root 1.166 clear_pending (EV_A_ (W)w);
2800 root 1.144 if (expect_false (!ev_is_active (w)))
2801     return;
2802    
2803 root 1.248 EV_FREQUENT_CHECK;
2804    
2805 root 1.144 {
2806 root 1.230 int active = ev_active (w);
2807    
2808 root 1.144 checks [active - 1] = checks [--checkcnt];
2809 root 1.230 ev_active (checks [active - 1]) = active;
2810 root 1.144 }
2811    
2812     ev_stop (EV_A_ (W)w);
2813 root 1.248
2814     EV_FREQUENT_CHECK;
2815 root 1.144 }
2816    
2817     #if EV_EMBED_ENABLE
2818     void noinline
2819     ev_embed_sweep (EV_P_ ev_embed *w)
2820     {
2821 root 1.188 ev_loop (w->other, EVLOOP_NONBLOCK);
2822 root 1.144 }
2823    
2824     static void
2825 root 1.189 embed_io_cb (EV_P_ ev_io *io, int revents)
2826 root 1.144 {
2827     ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2828    
2829     if (ev_cb (w))
2830     ev_feed_event (EV_A_ (W)w, EV_EMBED);
2831     else
2832 root 1.195 ev_loop (w->other, EVLOOP_NONBLOCK);
2833 root 1.144 }
2834    
2835 root 1.189 static void
2836     embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2837     {
2838     ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2839    
2840 root 1.195 {
2841     struct ev_loop *loop = w->other;
2842    
2843     while (fdchangecnt)
2844     {
2845     fd_reify (EV_A);
2846     ev_loop (EV_A_ EVLOOP_NONBLOCK);
2847     }
2848     }
2849     }
2850    
2851 root 1.261 static void
2852     embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2853     {
2854     ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2855    
2856     {
2857     struct ev_loop *loop = w->other;
2858    
2859     ev_loop_fork (EV_A);
2860     }
2861     }
2862    
2863 root 1.195 #if 0
2864     static void
2865     embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2866     {
2867     ev_idle_stop (EV_A_ idle);
2868 root 1.189 }
2869 root 1.195 #endif
2870 root 1.189
2871 root 1.144 void
2872     ev_embed_start (EV_P_ ev_embed *w)
2873     {
2874     if (expect_false (ev_is_active (w)))
2875     return;
2876    
2877     {
2878 root 1.188 struct ev_loop *loop = w->other;
2879 root 1.144 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2880 root 1.191 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2881 root 1.144 }
2882    
2883 root 1.248 EV_FREQUENT_CHECK;
2884    
2885 root 1.144 ev_set_priority (&w->io, ev_priority (w));
2886     ev_io_start (EV_A_ &w->io);
2887    
2888 root 1.189 ev_prepare_init (&w->prepare, embed_prepare_cb);
2889     ev_set_priority (&w->prepare, EV_MINPRI);
2890     ev_prepare_start (EV_A_ &w->prepare);
2891    
2892 root 1.261 ev_fork_init (&w->fork, embed_fork_cb);
2893     ev_fork_start (EV_A_ &w->fork);
2894    
2895 root 1.195 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2896    
2897 root 1.144 ev_start (EV_A_ (W)w, 1);
2898 root 1.248
2899     EV_FREQUENT_CHECK;
2900 root 1.144 }
2901    
2902     void
2903     ev_embed_stop (EV_P_ ev_embed *w)
2904     {
2905 root 1.166 clear_pending (EV_A_ (W)w);
2906 root 1.144 if (expect_false (!ev_is_active (w)))
2907     return;
2908    
2909 root 1.248 EV_FREQUENT_CHECK;
2910    
2911 root 1.261 ev_io_stop (EV_A_ &w->io);
2912 root 1.189 ev_prepare_stop (EV_A_ &w->prepare);
2913 root 1.261 ev_fork_stop (EV_A_ &w->fork);
2914 root 1.248
2915     EV_FREQUENT_CHECK;
2916 root 1.144 }
2917     #endif
2918    
2919 root 1.147 #if EV_FORK_ENABLE
2920     void
2921     ev_fork_start (EV_P_ ev_fork *w)
2922     {
2923     if (expect_false (ev_is_active (w)))
2924     return;
2925    
2926 root 1.248 EV_FREQUENT_CHECK;
2927    
2928 root 1.147 ev_start (EV_A_ (W)w, ++forkcnt);
2929     array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2930     forks [forkcnt - 1] = w;
2931 root 1.248
2932     EV_FREQUENT_CHECK;
2933 root 1.147 }
2934    
2935     void
2936     ev_fork_stop (EV_P_ ev_fork *w)
2937     {
2938 root 1.166 clear_pending (EV_A_ (W)w);
2939 root 1.147 if (expect_false (!ev_is_active (w)))
2940     return;
2941    
2942 root 1.248 EV_FREQUENT_CHECK;
2943    
2944 root 1.147 {
2945 root 1.230 int active = ev_active (w);
2946    
2947 root 1.147 forks [active - 1] = forks [--forkcnt];
2948 root 1.230 ev_active (forks [active - 1]) = active;
2949 root 1.147 }
2950    
2951     ev_stop (EV_A_ (W)w);
2952 root 1.248
2953     EV_FREQUENT_CHECK;
2954 root 1.147 }
2955     #endif
2956    
2957 root 1.207 #if EV_ASYNC_ENABLE
2958     void
2959     ev_async_start (EV_P_ ev_async *w)
2960     {
2961     if (expect_false (ev_is_active (w)))
2962     return;
2963    
2964     evpipe_init (EV_A);
2965    
2966 root 1.248 EV_FREQUENT_CHECK;
2967    
2968 root 1.207 ev_start (EV_A_ (W)w, ++asynccnt);
2969     array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2970     asyncs [asynccnt - 1] = w;
2971 root 1.248
2972     EV_FREQUENT_CHECK;
2973 root 1.207 }
2974    
2975     void
2976     ev_async_stop (EV_P_ ev_async *w)
2977     {
2978     clear_pending (EV_A_ (W)w);
2979     if (expect_false (!ev_is_active (w)))
2980     return;
2981    
2982 root 1.248 EV_FREQUENT_CHECK;
2983    
2984 root 1.207 {
2985 root 1.230 int active = ev_active (w);
2986    
2987 root 1.207 asyncs [active - 1] = asyncs [--asynccnt];
2988 root 1.230 ev_active (asyncs [active - 1]) = active;
2989 root 1.207 }
2990    
2991     ev_stop (EV_A_ (W)w);
2992 root 1.248
2993     EV_FREQUENT_CHECK;
2994 root 1.207 }
2995    
2996     void
2997     ev_async_send (EV_P_ ev_async *w)
2998     {
2999     w->sent = 1;
3000 root 1.214 evpipe_write (EV_A_ &gotasync);
3001 root 1.207 }
3002     #endif
3003    
3004 root 1.1 /*****************************************************************************/
3005 root 1.10
3006 root 1.16 struct ev_once
3007     {
3008 root 1.136 ev_io io;
3009     ev_timer to;
3010 root 1.16 void (*cb)(int revents, void *arg);
3011     void *arg;
3012     };
3013    
3014     static void
3015 root 1.51 once_cb (EV_P_ struct ev_once *once, int revents)
3016 root 1.16 {
3017     void (*cb)(int revents, void *arg) = once->cb;
3018     void *arg = once->arg;
3019    
3020 root 1.259 ev_io_stop (EV_A_ &once->io);
3021 root 1.51 ev_timer_stop (EV_A_ &once->to);
3022 root 1.69 ev_free (once);
3023 root 1.16
3024     cb (revents, arg);
3025     }
3026    
3027     static void
3028 root 1.136 once_cb_io (EV_P_ ev_io *w, int revents)
3029 root 1.16 {
3030 root 1.262 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3031    
3032     once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3033 root 1.16 }
3034    
3035     static void
3036 root 1.136 once_cb_to (EV_P_ ev_timer *w, int revents)
3037 root 1.16 {
3038 root 1.262 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3039    
3040     once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3041 root 1.16 }
3042    
3043     void
3044 root 1.51 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3045 root 1.16 {
3046 root 1.74 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3047 root 1.16
3048 root 1.123 if (expect_false (!once))
3049 root 1.16 {
3050 root 1.123 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3051     return;
3052     }
3053    
3054     once->cb = cb;
3055     once->arg = arg;
3056 root 1.16
3057 root 1.123 ev_init (&once->io, once_cb_io);
3058     if (fd >= 0)
3059     {
3060     ev_io_set (&once->io, fd, events);
3061     ev_io_start (EV_A_ &once->io);
3062     }
3063 root 1.16
3064 root 1.123 ev_init (&once->to, once_cb_to);
3065     if (timeout >= 0.)
3066     {
3067     ev_timer_set (&once->to, timeout, 0.);
3068     ev_timer_start (EV_A_ &once->to);
3069 root 1.16 }
3070     }
3071    
3072 root 1.188 #if EV_MULTIPLICITY
3073     #include "ev_wrap.h"
3074     #endif
3075    
3076 root 1.87 #ifdef __cplusplus
3077     }
3078     #endif
3079