1 |
/* |
2 |
* libev event processing core, watcher management |
3 |
* |
4 |
* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
5 |
* All rights reserved. |
6 |
* |
7 |
* Redistribution and use in source and binary forms, with or without |
8 |
* modification, are permitted provided that the following conditions are |
9 |
* met: |
10 |
* |
11 |
* * Redistributions of source code must retain the above copyright |
12 |
* notice, this list of conditions and the following disclaimer. |
13 |
* |
14 |
* * Redistributions in binary form must reproduce the above |
15 |
* copyright notice, this list of conditions and the following |
16 |
* disclaimer in the documentation and/or other materials provided |
17 |
* with the distribution. |
18 |
* |
19 |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
20 |
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
21 |
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
22 |
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
23 |
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
24 |
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
25 |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
26 |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
27 |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
28 |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
29 |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
30 |
*/ |
31 |
#ifndef EV_STANDALONE |
32 |
# include "config.h" |
33 |
|
34 |
# if HAVE_CLOCK_GETTIME |
35 |
# define EV_USE_MONOTONIC 1 |
36 |
# define EV_USE_REALTIME 1 |
37 |
# endif |
38 |
|
39 |
# if HAVE_SELECT && HAVE_SYS_SELECT_H |
40 |
# define EV_USE_SELECT 1 |
41 |
# endif |
42 |
|
43 |
# if HAVE_POLL && HAVE_POLL_H |
44 |
# define EV_USE_POLL 1 |
45 |
# endif |
46 |
|
47 |
# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H |
48 |
# define EV_USE_EPOLL 1 |
49 |
# endif |
50 |
|
51 |
# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H |
52 |
# define EV_USE_KQUEUE 1 |
53 |
# endif |
54 |
|
55 |
#endif |
56 |
|
57 |
#include <math.h> |
58 |
#include <stdlib.h> |
59 |
#include <unistd.h> |
60 |
#include <fcntl.h> |
61 |
#include <signal.h> |
62 |
#include <stddef.h> |
63 |
|
64 |
#include <stdio.h> |
65 |
|
66 |
#include <assert.h> |
67 |
#include <errno.h> |
68 |
#include <sys/types.h> |
69 |
#ifndef WIN32 |
70 |
# include <sys/wait.h> |
71 |
#endif |
72 |
#include <sys/time.h> |
73 |
#include <time.h> |
74 |
|
75 |
/**/ |
76 |
|
77 |
#ifndef EV_USE_MONOTONIC |
78 |
# define EV_USE_MONOTONIC 1 |
79 |
#endif |
80 |
|
81 |
#ifndef EV_USE_SELECT |
82 |
# define EV_USE_SELECT 1 |
83 |
#endif |
84 |
|
85 |
#ifndef EV_USE_POLL |
86 |
# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ |
87 |
#endif |
88 |
|
89 |
#ifndef EV_USE_EPOLL |
90 |
# define EV_USE_EPOLL 0 |
91 |
#endif |
92 |
|
93 |
#ifndef EV_USE_KQUEUE |
94 |
# define EV_USE_KQUEUE 0 |
95 |
#endif |
96 |
|
97 |
#ifndef EV_USE_WIN32 |
98 |
# ifdef WIN32 |
99 |
# define EV_USE_WIN32 1 |
100 |
# else |
101 |
# define EV_USE_WIN32 0 |
102 |
# endif |
103 |
#endif |
104 |
|
105 |
#ifndef EV_USE_REALTIME |
106 |
# define EV_USE_REALTIME 1 |
107 |
#endif |
108 |
|
109 |
/**/ |
110 |
|
111 |
#ifndef CLOCK_MONOTONIC |
112 |
# undef EV_USE_MONOTONIC |
113 |
# define EV_USE_MONOTONIC 0 |
114 |
#endif |
115 |
|
116 |
#ifndef CLOCK_REALTIME |
117 |
# undef EV_USE_REALTIME |
118 |
# define EV_USE_REALTIME 0 |
119 |
#endif |
120 |
|
121 |
/**/ |
122 |
|
123 |
#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
124 |
#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ |
125 |
#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
126 |
/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ |
127 |
|
128 |
#include "ev.h" |
129 |
|
130 |
#if __GNUC__ >= 3 |
131 |
# define expect(expr,value) __builtin_expect ((expr),(value)) |
132 |
# define inline inline |
133 |
#else |
134 |
# define expect(expr,value) (expr) |
135 |
# define inline static |
136 |
#endif |
137 |
|
138 |
#define expect_false(expr) expect ((expr) != 0, 0) |
139 |
#define expect_true(expr) expect ((expr) != 0, 1) |
140 |
|
141 |
#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
142 |
#define ABSPRI(w) ((w)->priority - EV_MINPRI) |
143 |
|
144 |
typedef struct ev_watcher *W; |
145 |
typedef struct ev_watcher_list *WL; |
146 |
typedef struct ev_watcher_time *WT; |
147 |
|
148 |
static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
149 |
|
150 |
/*****************************************************************************/ |
151 |
|
152 |
typedef struct |
153 |
{ |
154 |
struct ev_watcher_list *head; |
155 |
unsigned char events; |
156 |
unsigned char reify; |
157 |
} ANFD; |
158 |
|
159 |
typedef struct |
160 |
{ |
161 |
W w; |
162 |
int events; |
163 |
} ANPENDING; |
164 |
|
165 |
#if EV_MULTIPLICITY |
166 |
|
167 |
struct ev_loop |
168 |
{ |
169 |
# define VAR(name,decl) decl; |
170 |
# include "ev_vars.h" |
171 |
}; |
172 |
# undef VAR |
173 |
# include "ev_wrap.h" |
174 |
|
175 |
#else |
176 |
|
177 |
# define VAR(name,decl) static decl; |
178 |
# include "ev_vars.h" |
179 |
# undef VAR |
180 |
|
181 |
#endif |
182 |
|
183 |
/*****************************************************************************/ |
184 |
|
185 |
inline ev_tstamp |
186 |
ev_time (void) |
187 |
{ |
188 |
#if EV_USE_REALTIME |
189 |
struct timespec ts; |
190 |
clock_gettime (CLOCK_REALTIME, &ts); |
191 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
192 |
#else |
193 |
struct timeval tv; |
194 |
gettimeofday (&tv, 0); |
195 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
196 |
#endif |
197 |
} |
198 |
|
199 |
inline ev_tstamp |
200 |
get_clock (void) |
201 |
{ |
202 |
#if EV_USE_MONOTONIC |
203 |
if (expect_true (have_monotonic)) |
204 |
{ |
205 |
struct timespec ts; |
206 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
207 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
208 |
} |
209 |
#endif |
210 |
|
211 |
return ev_time (); |
212 |
} |
213 |
|
214 |
ev_tstamp |
215 |
ev_now (EV_P) |
216 |
{ |
217 |
return rt_now; |
218 |
} |
219 |
|
220 |
#define array_roundsize(base,n) ((n) | 4 & ~3) |
221 |
|
222 |
#define array_needsize(base,cur,cnt,init) \ |
223 |
if (expect_false ((cnt) > cur)) \ |
224 |
{ \ |
225 |
int newcnt = cur; \ |
226 |
do \ |
227 |
{ \ |
228 |
newcnt = array_roundsize (base, newcnt << 1); \ |
229 |
} \ |
230 |
while ((cnt) > newcnt); \ |
231 |
\ |
232 |
base = realloc (base, sizeof (*base) * (newcnt)); \ |
233 |
init (base + cur, newcnt - cur); \ |
234 |
cur = newcnt; \ |
235 |
} |
236 |
|
237 |
/*****************************************************************************/ |
238 |
|
239 |
static void |
240 |
anfds_init (ANFD *base, int count) |
241 |
{ |
242 |
while (count--) |
243 |
{ |
244 |
base->head = 0; |
245 |
base->events = EV_NONE; |
246 |
base->reify = 0; |
247 |
|
248 |
++base; |
249 |
} |
250 |
} |
251 |
|
252 |
static void |
253 |
event (EV_P_ W w, int events) |
254 |
{ |
255 |
if (w->pending) |
256 |
{ |
257 |
pendings [ABSPRI (w)][w->pending - 1].events |= events; |
258 |
return; |
259 |
} |
260 |
|
261 |
w->pending = ++pendingcnt [ABSPRI (w)]; |
262 |
array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], ); |
263 |
pendings [ABSPRI (w)][w->pending - 1].w = w; |
264 |
pendings [ABSPRI (w)][w->pending - 1].events = events; |
265 |
} |
266 |
|
267 |
static void |
268 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
269 |
{ |
270 |
int i; |
271 |
|
272 |
for (i = 0; i < eventcnt; ++i) |
273 |
event (EV_A_ events [i], type); |
274 |
} |
275 |
|
276 |
static void |
277 |
fd_event (EV_P_ int fd, int events) |
278 |
{ |
279 |
ANFD *anfd = anfds + fd; |
280 |
struct ev_io *w; |
281 |
|
282 |
for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
283 |
{ |
284 |
int ev = w->events & events; |
285 |
|
286 |
if (ev) |
287 |
event (EV_A_ (W)w, ev); |
288 |
} |
289 |
} |
290 |
|
291 |
/*****************************************************************************/ |
292 |
|
293 |
static void |
294 |
fd_reify (EV_P) |
295 |
{ |
296 |
int i; |
297 |
|
298 |
for (i = 0; i < fdchangecnt; ++i) |
299 |
{ |
300 |
int fd = fdchanges [i]; |
301 |
ANFD *anfd = anfds + fd; |
302 |
struct ev_io *w; |
303 |
|
304 |
int events = 0; |
305 |
|
306 |
for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
307 |
events |= w->events; |
308 |
|
309 |
anfd->reify = 0; |
310 |
|
311 |
if (anfd->events != events) |
312 |
{ |
313 |
method_modify (EV_A_ fd, anfd->events, events); |
314 |
anfd->events = events; |
315 |
} |
316 |
} |
317 |
|
318 |
fdchangecnt = 0; |
319 |
} |
320 |
|
321 |
static void |
322 |
fd_change (EV_P_ int fd) |
323 |
{ |
324 |
if (anfds [fd].reify || fdchangecnt < 0) |
325 |
return; |
326 |
|
327 |
anfds [fd].reify = 1; |
328 |
|
329 |
++fdchangecnt; |
330 |
array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
331 |
fdchanges [fdchangecnt - 1] = fd; |
332 |
} |
333 |
|
334 |
static void |
335 |
fd_kill (EV_P_ int fd) |
336 |
{ |
337 |
struct ev_io *w; |
338 |
|
339 |
while ((w = (struct ev_io *)anfds [fd].head)) |
340 |
{ |
341 |
ev_io_stop (EV_A_ w); |
342 |
event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
343 |
} |
344 |
} |
345 |
|
346 |
/* called on EBADF to verify fds */ |
347 |
static void |
348 |
fd_ebadf (EV_P) |
349 |
{ |
350 |
int fd; |
351 |
|
352 |
for (fd = 0; fd < anfdmax; ++fd) |
353 |
if (anfds [fd].events) |
354 |
if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
355 |
fd_kill (EV_A_ fd); |
356 |
} |
357 |
|
358 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
359 |
static void |
360 |
fd_enomem (EV_P) |
361 |
{ |
362 |
int fd; |
363 |
|
364 |
for (fd = anfdmax; fd--; ) |
365 |
if (anfds [fd].events) |
366 |
{ |
367 |
close (fd); |
368 |
fd_kill (EV_A_ fd); |
369 |
return; |
370 |
} |
371 |
} |
372 |
|
373 |
/* susually called after fork if method needs to re-arm all fds from scratch */ |
374 |
static void |
375 |
fd_rearm_all (EV_P) |
376 |
{ |
377 |
int fd; |
378 |
|
379 |
/* this should be highly optimised to not do anything but set a flag */ |
380 |
for (fd = 0; fd < anfdmax; ++fd) |
381 |
if (anfds [fd].events) |
382 |
{ |
383 |
anfds [fd].events = 0; |
384 |
fd_change (EV_A_ fd); |
385 |
} |
386 |
} |
387 |
|
388 |
/*****************************************************************************/ |
389 |
|
390 |
static void |
391 |
upheap (WT *heap, int k) |
392 |
{ |
393 |
WT w = heap [k]; |
394 |
|
395 |
while (k && heap [k >> 1]->at > w->at) |
396 |
{ |
397 |
heap [k] = heap [k >> 1]; |
398 |
((W)heap [k])->active = k + 1; |
399 |
k >>= 1; |
400 |
} |
401 |
|
402 |
heap [k] = w; |
403 |
((W)heap [k])->active = k + 1; |
404 |
|
405 |
} |
406 |
|
407 |
static void |
408 |
downheap (WT *heap, int N, int k) |
409 |
{ |
410 |
WT w = heap [k]; |
411 |
|
412 |
while (k < (N >> 1)) |
413 |
{ |
414 |
int j = k << 1; |
415 |
|
416 |
if (j + 1 < N && heap [j]->at > heap [j + 1]->at) |
417 |
++j; |
418 |
|
419 |
if (w->at <= heap [j]->at) |
420 |
break; |
421 |
|
422 |
heap [k] = heap [j]; |
423 |
((W)heap [k])->active = k + 1; |
424 |
k = j; |
425 |
} |
426 |
|
427 |
heap [k] = w; |
428 |
((W)heap [k])->active = k + 1; |
429 |
} |
430 |
|
431 |
/*****************************************************************************/ |
432 |
|
433 |
typedef struct |
434 |
{ |
435 |
struct ev_watcher_list *head; |
436 |
sig_atomic_t volatile gotsig; |
437 |
} ANSIG; |
438 |
|
439 |
static ANSIG *signals; |
440 |
static int signalmax; |
441 |
|
442 |
static int sigpipe [2]; |
443 |
static sig_atomic_t volatile gotsig; |
444 |
static struct ev_io sigev; |
445 |
|
446 |
static void |
447 |
signals_init (ANSIG *base, int count) |
448 |
{ |
449 |
while (count--) |
450 |
{ |
451 |
base->head = 0; |
452 |
base->gotsig = 0; |
453 |
|
454 |
++base; |
455 |
} |
456 |
} |
457 |
|
458 |
static void |
459 |
sighandler (int signum) |
460 |
{ |
461 |
signals [signum - 1].gotsig = 1; |
462 |
|
463 |
if (!gotsig) |
464 |
{ |
465 |
int old_errno = errno; |
466 |
gotsig = 1; |
467 |
write (sigpipe [1], &signum, 1); |
468 |
errno = old_errno; |
469 |
} |
470 |
} |
471 |
|
472 |
static void |
473 |
sigcb (EV_P_ struct ev_io *iow, int revents) |
474 |
{ |
475 |
struct ev_watcher_list *w; |
476 |
int signum; |
477 |
|
478 |
read (sigpipe [0], &revents, 1); |
479 |
gotsig = 0; |
480 |
|
481 |
for (signum = signalmax; signum--; ) |
482 |
if (signals [signum].gotsig) |
483 |
{ |
484 |
signals [signum].gotsig = 0; |
485 |
|
486 |
for (w = signals [signum].head; w; w = w->next) |
487 |
event (EV_A_ (W)w, EV_SIGNAL); |
488 |
} |
489 |
} |
490 |
|
491 |
static void |
492 |
siginit (EV_P) |
493 |
{ |
494 |
#ifndef WIN32 |
495 |
fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
496 |
fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
497 |
|
498 |
/* rather than sort out wether we really need nb, set it */ |
499 |
fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
500 |
fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
501 |
#endif |
502 |
|
503 |
ev_io_set (&sigev, sigpipe [0], EV_READ); |
504 |
ev_io_start (EV_A_ &sigev); |
505 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
506 |
} |
507 |
|
508 |
/*****************************************************************************/ |
509 |
|
510 |
#ifndef WIN32 |
511 |
|
512 |
static struct ev_child *childs [PID_HASHSIZE]; |
513 |
static struct ev_signal childev; |
514 |
|
515 |
#ifndef WCONTINUED |
516 |
# define WCONTINUED 0 |
517 |
#endif |
518 |
|
519 |
static void |
520 |
child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) |
521 |
{ |
522 |
struct ev_child *w; |
523 |
|
524 |
for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) |
525 |
if (w->pid == pid || !w->pid) |
526 |
{ |
527 |
ev_priority (w) = ev_priority (sw); /* need to do it *now* */ |
528 |
w->rpid = pid; |
529 |
w->rstatus = status; |
530 |
event (EV_A_ (W)w, EV_CHILD); |
531 |
} |
532 |
} |
533 |
|
534 |
static void |
535 |
childcb (EV_P_ struct ev_signal *sw, int revents) |
536 |
{ |
537 |
int pid, status; |
538 |
|
539 |
if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
540 |
{ |
541 |
/* make sure we are called again until all childs have been reaped */ |
542 |
event (EV_A_ (W)sw, EV_SIGNAL); |
543 |
|
544 |
child_reap (EV_A_ sw, pid, pid, status); |
545 |
child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ |
546 |
} |
547 |
} |
548 |
|
549 |
#endif |
550 |
|
551 |
/*****************************************************************************/ |
552 |
|
553 |
#if EV_USE_KQUEUE |
554 |
# include "ev_kqueue.c" |
555 |
#endif |
556 |
#if EV_USE_EPOLL |
557 |
# include "ev_epoll.c" |
558 |
#endif |
559 |
#if EV_USE_POLL |
560 |
# include "ev_poll.c" |
561 |
#endif |
562 |
#if EV_USE_SELECT |
563 |
# include "ev_select.c" |
564 |
#endif |
565 |
|
566 |
int |
567 |
ev_version_major (void) |
568 |
{ |
569 |
return EV_VERSION_MAJOR; |
570 |
} |
571 |
|
572 |
int |
573 |
ev_version_minor (void) |
574 |
{ |
575 |
return EV_VERSION_MINOR; |
576 |
} |
577 |
|
578 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
579 |
static int |
580 |
enable_secure (void) |
581 |
{ |
582 |
#ifdef WIN32 |
583 |
return 0; |
584 |
#else |
585 |
return getuid () != geteuid () |
586 |
|| getgid () != getegid (); |
587 |
#endif |
588 |
} |
589 |
|
590 |
int |
591 |
ev_method (EV_P) |
592 |
{ |
593 |
return method; |
594 |
} |
595 |
|
596 |
static void |
597 |
loop_init (EV_P_ int methods) |
598 |
{ |
599 |
if (!method) |
600 |
{ |
601 |
#if EV_USE_MONOTONIC |
602 |
{ |
603 |
struct timespec ts; |
604 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
605 |
have_monotonic = 1; |
606 |
} |
607 |
#endif |
608 |
|
609 |
rt_now = ev_time (); |
610 |
mn_now = get_clock (); |
611 |
now_floor = mn_now; |
612 |
rtmn_diff = rt_now - mn_now; |
613 |
|
614 |
if (methods == EVMETHOD_AUTO) |
615 |
if (!enable_secure () && getenv ("LIBEV_METHODS")) |
616 |
methods = atoi (getenv ("LIBEV_METHODS")); |
617 |
else |
618 |
methods = EVMETHOD_ANY; |
619 |
|
620 |
method = 0; |
621 |
#if EV_USE_WIN32 |
622 |
if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); |
623 |
#endif |
624 |
#if EV_USE_KQUEUE |
625 |
if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); |
626 |
#endif |
627 |
#if EV_USE_EPOLL |
628 |
if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); |
629 |
#endif |
630 |
#if EV_USE_POLL |
631 |
if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); |
632 |
#endif |
633 |
#if EV_USE_SELECT |
634 |
if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); |
635 |
#endif |
636 |
} |
637 |
} |
638 |
|
639 |
void |
640 |
loop_destroy (EV_P) |
641 |
{ |
642 |
#if EV_USE_WIN32 |
643 |
if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); |
644 |
#endif |
645 |
#if EV_USE_KQUEUE |
646 |
if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); |
647 |
#endif |
648 |
#if EV_USE_EPOLL |
649 |
if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); |
650 |
#endif |
651 |
#if EV_USE_POLL |
652 |
if (method == EVMETHOD_POLL ) poll_destroy (EV_A); |
653 |
#endif |
654 |
#if EV_USE_SELECT |
655 |
if (method == EVMETHOD_SELECT) select_destroy (EV_A); |
656 |
#endif |
657 |
|
658 |
method = 0; |
659 |
/*TODO*/ |
660 |
} |
661 |
|
662 |
void |
663 |
loop_fork (EV_P) |
664 |
{ |
665 |
/*TODO*/ |
666 |
#if EV_USE_EPOLL |
667 |
if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); |
668 |
#endif |
669 |
#if EV_USE_KQUEUE |
670 |
if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); |
671 |
#endif |
672 |
} |
673 |
|
674 |
#if EV_MULTIPLICITY |
675 |
struct ev_loop * |
676 |
ev_loop_new (int methods) |
677 |
{ |
678 |
struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); |
679 |
|
680 |
loop_init (EV_A_ methods); |
681 |
|
682 |
if (ev_method (EV_A)) |
683 |
return loop; |
684 |
|
685 |
return 0; |
686 |
} |
687 |
|
688 |
void |
689 |
ev_loop_destroy (EV_P) |
690 |
{ |
691 |
loop_destroy (EV_A); |
692 |
free (loop); |
693 |
} |
694 |
|
695 |
void |
696 |
ev_loop_fork (EV_P) |
697 |
{ |
698 |
loop_fork (EV_A); |
699 |
} |
700 |
|
701 |
#endif |
702 |
|
703 |
#if EV_MULTIPLICITY |
704 |
struct ev_loop default_loop_struct; |
705 |
static struct ev_loop *default_loop; |
706 |
|
707 |
struct ev_loop * |
708 |
#else |
709 |
static int default_loop; |
710 |
|
711 |
int |
712 |
#endif |
713 |
ev_default_loop (int methods) |
714 |
{ |
715 |
if (sigpipe [0] == sigpipe [1]) |
716 |
if (pipe (sigpipe)) |
717 |
return 0; |
718 |
|
719 |
if (!default_loop) |
720 |
{ |
721 |
#if EV_MULTIPLICITY |
722 |
struct ev_loop *loop = default_loop = &default_loop_struct; |
723 |
#else |
724 |
default_loop = 1; |
725 |
#endif |
726 |
|
727 |
loop_init (EV_A_ methods); |
728 |
|
729 |
if (ev_method (EV_A)) |
730 |
{ |
731 |
ev_watcher_init (&sigev, sigcb); |
732 |
ev_set_priority (&sigev, EV_MAXPRI); |
733 |
siginit (EV_A); |
734 |
|
735 |
#ifndef WIN32 |
736 |
ev_signal_init (&childev, childcb, SIGCHLD); |
737 |
ev_set_priority (&childev, EV_MAXPRI); |
738 |
ev_signal_start (EV_A_ &childev); |
739 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
740 |
#endif |
741 |
} |
742 |
else |
743 |
default_loop = 0; |
744 |
} |
745 |
|
746 |
return default_loop; |
747 |
} |
748 |
|
749 |
void |
750 |
ev_default_destroy (void) |
751 |
{ |
752 |
#if EV_MULTIPLICITY |
753 |
struct ev_loop *loop = default_loop; |
754 |
#endif |
755 |
|
756 |
ev_ref (EV_A); /* child watcher */ |
757 |
ev_signal_stop (EV_A_ &childev); |
758 |
|
759 |
ev_ref (EV_A); /* signal watcher */ |
760 |
ev_io_stop (EV_A_ &sigev); |
761 |
|
762 |
close (sigpipe [0]); sigpipe [0] = 0; |
763 |
close (sigpipe [1]); sigpipe [1] = 0; |
764 |
|
765 |
loop_destroy (EV_A); |
766 |
} |
767 |
|
768 |
void |
769 |
ev_default_fork (void) |
770 |
{ |
771 |
#if EV_MULTIPLICITY |
772 |
struct ev_loop *loop = default_loop; |
773 |
#endif |
774 |
|
775 |
loop_fork (EV_A); |
776 |
|
777 |
ev_io_stop (EV_A_ &sigev); |
778 |
close (sigpipe [0]); |
779 |
close (sigpipe [1]); |
780 |
pipe (sigpipe); |
781 |
|
782 |
ev_ref (EV_A); /* signal watcher */ |
783 |
siginit (EV_A); |
784 |
} |
785 |
|
786 |
/*****************************************************************************/ |
787 |
|
788 |
static void |
789 |
call_pending (EV_P) |
790 |
{ |
791 |
int pri; |
792 |
|
793 |
for (pri = NUMPRI; pri--; ) |
794 |
while (pendingcnt [pri]) |
795 |
{ |
796 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
797 |
|
798 |
if (p->w) |
799 |
{ |
800 |
p->w->pending = 0; |
801 |
|
802 |
(*(void (**)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events); |
803 |
} |
804 |
} |
805 |
} |
806 |
|
807 |
static void |
808 |
timers_reify (EV_P) |
809 |
{ |
810 |
while (timercnt && ((WT)timers [0])->at <= mn_now) |
811 |
{ |
812 |
struct ev_timer *w = timers [0]; |
813 |
|
814 |
assert (("inactive timer on timer heap detected", ev_is_active (w))); |
815 |
|
816 |
/* first reschedule or stop timer */ |
817 |
if (w->repeat) |
818 |
{ |
819 |
assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
820 |
((WT)w)->at = mn_now + w->repeat; |
821 |
downheap ((WT *)timers, timercnt, 0); |
822 |
} |
823 |
else |
824 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
825 |
|
826 |
event (EV_A_ (W)w, EV_TIMEOUT); |
827 |
} |
828 |
} |
829 |
|
830 |
static void |
831 |
periodics_reify (EV_P) |
832 |
{ |
833 |
while (periodiccnt && ((WT)periodics [0])->at <= rt_now) |
834 |
{ |
835 |
struct ev_periodic *w = periodics [0]; |
836 |
|
837 |
assert (("inactive timer on periodic heap detected", ev_is_active (w))); |
838 |
|
839 |
/* first reschedule or stop timer */ |
840 |
if (w->interval) |
841 |
{ |
842 |
((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; |
843 |
assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); |
844 |
downheap ((WT *)periodics, periodiccnt, 0); |
845 |
} |
846 |
else |
847 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
848 |
|
849 |
event (EV_A_ (W)w, EV_PERIODIC); |
850 |
} |
851 |
} |
852 |
|
853 |
static void |
854 |
periodics_reschedule (EV_P) |
855 |
{ |
856 |
int i; |
857 |
|
858 |
/* adjust periodics after time jump */ |
859 |
for (i = 0; i < periodiccnt; ++i) |
860 |
{ |
861 |
struct ev_periodic *w = periodics [i]; |
862 |
|
863 |
if (w->interval) |
864 |
{ |
865 |
ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; |
866 |
|
867 |
if (fabs (diff) >= 1e-4) |
868 |
{ |
869 |
ev_periodic_stop (EV_A_ w); |
870 |
ev_periodic_start (EV_A_ w); |
871 |
|
872 |
i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
873 |
} |
874 |
} |
875 |
} |
876 |
} |
877 |
|
878 |
inline int |
879 |
time_update_monotonic (EV_P) |
880 |
{ |
881 |
mn_now = get_clock (); |
882 |
|
883 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
884 |
{ |
885 |
rt_now = rtmn_diff + mn_now; |
886 |
return 0; |
887 |
} |
888 |
else |
889 |
{ |
890 |
now_floor = mn_now; |
891 |
rt_now = ev_time (); |
892 |
return 1; |
893 |
} |
894 |
} |
895 |
|
896 |
static void |
897 |
time_update (EV_P) |
898 |
{ |
899 |
int i; |
900 |
|
901 |
#if EV_USE_MONOTONIC |
902 |
if (expect_true (have_monotonic)) |
903 |
{ |
904 |
if (time_update_monotonic (EV_A)) |
905 |
{ |
906 |
ev_tstamp odiff = rtmn_diff; |
907 |
|
908 |
for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
909 |
{ |
910 |
rtmn_diff = rt_now - mn_now; |
911 |
|
912 |
if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
913 |
return; /* all is well */ |
914 |
|
915 |
rt_now = ev_time (); |
916 |
mn_now = get_clock (); |
917 |
now_floor = mn_now; |
918 |
} |
919 |
|
920 |
periodics_reschedule (EV_A); |
921 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
922 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
923 |
} |
924 |
} |
925 |
else |
926 |
#endif |
927 |
{ |
928 |
rt_now = ev_time (); |
929 |
|
930 |
if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
931 |
{ |
932 |
periodics_reschedule (EV_A); |
933 |
|
934 |
/* adjust timers. this is easy, as the offset is the same for all */ |
935 |
for (i = 0; i < timercnt; ++i) |
936 |
((WT)timers [i])->at += rt_now - mn_now; |
937 |
} |
938 |
|
939 |
mn_now = rt_now; |
940 |
} |
941 |
} |
942 |
|
943 |
void |
944 |
ev_ref (EV_P) |
945 |
{ |
946 |
++activecnt; |
947 |
} |
948 |
|
949 |
void |
950 |
ev_unref (EV_P) |
951 |
{ |
952 |
--activecnt; |
953 |
} |
954 |
|
955 |
static int loop_done; |
956 |
|
957 |
void |
958 |
ev_loop (EV_P_ int flags) |
959 |
{ |
960 |
double block; |
961 |
loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
962 |
|
963 |
do |
964 |
{ |
965 |
/* queue check watchers (and execute them) */ |
966 |
if (expect_false (preparecnt)) |
967 |
{ |
968 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
969 |
call_pending (EV_A); |
970 |
} |
971 |
|
972 |
/* update fd-related kernel structures */ |
973 |
fd_reify (EV_A); |
974 |
|
975 |
/* calculate blocking time */ |
976 |
|
977 |
/* we only need this for !monotonic clockor timers, but as we basically |
978 |
always have timers, we just calculate it always */ |
979 |
#if EV_USE_MONOTONIC |
980 |
if (expect_true (have_monotonic)) |
981 |
time_update_monotonic (EV_A); |
982 |
else |
983 |
#endif |
984 |
{ |
985 |
rt_now = ev_time (); |
986 |
mn_now = rt_now; |
987 |
} |
988 |
|
989 |
if (flags & EVLOOP_NONBLOCK || idlecnt) |
990 |
block = 0.; |
991 |
else |
992 |
{ |
993 |
block = MAX_BLOCKTIME; |
994 |
|
995 |
if (timercnt) |
996 |
{ |
997 |
ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; |
998 |
if (block > to) block = to; |
999 |
} |
1000 |
|
1001 |
if (periodiccnt) |
1002 |
{ |
1003 |
ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; |
1004 |
if (block > to) block = to; |
1005 |
} |
1006 |
|
1007 |
if (block < 0.) block = 0.; |
1008 |
} |
1009 |
|
1010 |
method_poll (EV_A_ block); |
1011 |
|
1012 |
/* update rt_now, do magic */ |
1013 |
time_update (EV_A); |
1014 |
|
1015 |
/* queue pending timers and reschedule them */ |
1016 |
timers_reify (EV_A); /* relative timers called last */ |
1017 |
periodics_reify (EV_A); /* absolute timers called first */ |
1018 |
|
1019 |
/* queue idle watchers unless io or timers are pending */ |
1020 |
if (!pendingcnt) |
1021 |
queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); |
1022 |
|
1023 |
/* queue check watchers, to be executed first */ |
1024 |
if (checkcnt) |
1025 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
1026 |
|
1027 |
call_pending (EV_A); |
1028 |
} |
1029 |
while (activecnt && !loop_done); |
1030 |
|
1031 |
if (loop_done != 2) |
1032 |
loop_done = 0; |
1033 |
} |
1034 |
|
1035 |
void |
1036 |
ev_unloop (EV_P_ int how) |
1037 |
{ |
1038 |
loop_done = how; |
1039 |
} |
1040 |
|
1041 |
/*****************************************************************************/ |
1042 |
|
1043 |
inline void |
1044 |
wlist_add (WL *head, WL elem) |
1045 |
{ |
1046 |
elem->next = *head; |
1047 |
*head = elem; |
1048 |
} |
1049 |
|
1050 |
inline void |
1051 |
wlist_del (WL *head, WL elem) |
1052 |
{ |
1053 |
while (*head) |
1054 |
{ |
1055 |
if (*head == elem) |
1056 |
{ |
1057 |
*head = elem->next; |
1058 |
return; |
1059 |
} |
1060 |
|
1061 |
head = &(*head)->next; |
1062 |
} |
1063 |
} |
1064 |
|
1065 |
inline void |
1066 |
ev_clear_pending (EV_P_ W w) |
1067 |
{ |
1068 |
if (w->pending) |
1069 |
{ |
1070 |
pendings [ABSPRI (w)][w->pending - 1].w = 0; |
1071 |
w->pending = 0; |
1072 |
} |
1073 |
} |
1074 |
|
1075 |
inline void |
1076 |
ev_start (EV_P_ W w, int active) |
1077 |
{ |
1078 |
if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; |
1079 |
if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; |
1080 |
|
1081 |
w->active = active; |
1082 |
ev_ref (EV_A); |
1083 |
} |
1084 |
|
1085 |
inline void |
1086 |
ev_stop (EV_P_ W w) |
1087 |
{ |
1088 |
ev_unref (EV_A); |
1089 |
w->active = 0; |
1090 |
} |
1091 |
|
1092 |
/*****************************************************************************/ |
1093 |
|
1094 |
void |
1095 |
ev_io_start (EV_P_ struct ev_io *w) |
1096 |
{ |
1097 |
int fd = w->fd; |
1098 |
|
1099 |
if (ev_is_active (w)) |
1100 |
return; |
1101 |
|
1102 |
assert (("ev_io_start called with negative fd", fd >= 0)); |
1103 |
|
1104 |
ev_start (EV_A_ (W)w, 1); |
1105 |
array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
1106 |
wlist_add ((WL *)&anfds[fd].head, (WL)w); |
1107 |
|
1108 |
fd_change (EV_A_ fd); |
1109 |
} |
1110 |
|
1111 |
void |
1112 |
ev_io_stop (EV_P_ struct ev_io *w) |
1113 |
{ |
1114 |
ev_clear_pending (EV_A_ (W)w); |
1115 |
if (!ev_is_active (w)) |
1116 |
return; |
1117 |
|
1118 |
wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
1119 |
ev_stop (EV_A_ (W)w); |
1120 |
|
1121 |
fd_change (EV_A_ w->fd); |
1122 |
} |
1123 |
|
1124 |
void |
1125 |
ev_timer_start (EV_P_ struct ev_timer *w) |
1126 |
{ |
1127 |
if (ev_is_active (w)) |
1128 |
return; |
1129 |
|
1130 |
((WT)w)->at += mn_now; |
1131 |
|
1132 |
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
1133 |
|
1134 |
ev_start (EV_A_ (W)w, ++timercnt); |
1135 |
array_needsize (timers, timermax, timercnt, ); |
1136 |
timers [timercnt - 1] = w; |
1137 |
upheap ((WT *)timers, timercnt - 1); |
1138 |
|
1139 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
1140 |
} |
1141 |
|
1142 |
void |
1143 |
ev_timer_stop (EV_P_ struct ev_timer *w) |
1144 |
{ |
1145 |
ev_clear_pending (EV_A_ (W)w); |
1146 |
if (!ev_is_active (w)) |
1147 |
return; |
1148 |
|
1149 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
1150 |
|
1151 |
if (((W)w)->active < timercnt--) |
1152 |
{ |
1153 |
timers [((W)w)->active - 1] = timers [timercnt]; |
1154 |
downheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
1155 |
} |
1156 |
|
1157 |
((WT)w)->at = w->repeat; |
1158 |
|
1159 |
ev_stop (EV_A_ (W)w); |
1160 |
} |
1161 |
|
1162 |
void |
1163 |
ev_timer_again (EV_P_ struct ev_timer *w) |
1164 |
{ |
1165 |
if (ev_is_active (w)) |
1166 |
{ |
1167 |
if (w->repeat) |
1168 |
{ |
1169 |
((WT)w)->at = mn_now + w->repeat; |
1170 |
downheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
1171 |
} |
1172 |
else |
1173 |
ev_timer_stop (EV_A_ w); |
1174 |
} |
1175 |
else if (w->repeat) |
1176 |
ev_timer_start (EV_A_ w); |
1177 |
} |
1178 |
|
1179 |
void |
1180 |
ev_periodic_start (EV_P_ struct ev_periodic *w) |
1181 |
{ |
1182 |
if (ev_is_active (w)) |
1183 |
return; |
1184 |
|
1185 |
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
1186 |
|
1187 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
1188 |
if (w->interval) |
1189 |
((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; |
1190 |
|
1191 |
ev_start (EV_A_ (W)w, ++periodiccnt); |
1192 |
array_needsize (periodics, periodicmax, periodiccnt, ); |
1193 |
periodics [periodiccnt - 1] = w; |
1194 |
upheap ((WT *)periodics, periodiccnt - 1); |
1195 |
|
1196 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
1197 |
} |
1198 |
|
1199 |
void |
1200 |
ev_periodic_stop (EV_P_ struct ev_periodic *w) |
1201 |
{ |
1202 |
ev_clear_pending (EV_A_ (W)w); |
1203 |
if (!ev_is_active (w)) |
1204 |
return; |
1205 |
|
1206 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
1207 |
|
1208 |
if (((W)w)->active < periodiccnt--) |
1209 |
{ |
1210 |
periodics [((W)w)->active - 1] = periodics [periodiccnt]; |
1211 |
downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); |
1212 |
} |
1213 |
|
1214 |
ev_stop (EV_A_ (W)w); |
1215 |
} |
1216 |
|
1217 |
void |
1218 |
ev_idle_start (EV_P_ struct ev_idle *w) |
1219 |
{ |
1220 |
if (ev_is_active (w)) |
1221 |
return; |
1222 |
|
1223 |
ev_start (EV_A_ (W)w, ++idlecnt); |
1224 |
array_needsize (idles, idlemax, idlecnt, ); |
1225 |
idles [idlecnt - 1] = w; |
1226 |
} |
1227 |
|
1228 |
void |
1229 |
ev_idle_stop (EV_P_ struct ev_idle *w) |
1230 |
{ |
1231 |
ev_clear_pending (EV_A_ (W)w); |
1232 |
if (ev_is_active (w)) |
1233 |
return; |
1234 |
|
1235 |
idles [((W)w)->active - 1] = idles [--idlecnt]; |
1236 |
ev_stop (EV_A_ (W)w); |
1237 |
} |
1238 |
|
1239 |
void |
1240 |
ev_prepare_start (EV_P_ struct ev_prepare *w) |
1241 |
{ |
1242 |
if (ev_is_active (w)) |
1243 |
return; |
1244 |
|
1245 |
ev_start (EV_A_ (W)w, ++preparecnt); |
1246 |
array_needsize (prepares, preparemax, preparecnt, ); |
1247 |
prepares [preparecnt - 1] = w; |
1248 |
} |
1249 |
|
1250 |
void |
1251 |
ev_prepare_stop (EV_P_ struct ev_prepare *w) |
1252 |
{ |
1253 |
ev_clear_pending (EV_A_ (W)w); |
1254 |
if (ev_is_active (w)) |
1255 |
return; |
1256 |
|
1257 |
prepares [((W)w)->active - 1] = prepares [--preparecnt]; |
1258 |
ev_stop (EV_A_ (W)w); |
1259 |
} |
1260 |
|
1261 |
void |
1262 |
ev_check_start (EV_P_ struct ev_check *w) |
1263 |
{ |
1264 |
if (ev_is_active (w)) |
1265 |
return; |
1266 |
|
1267 |
ev_start (EV_A_ (W)w, ++checkcnt); |
1268 |
array_needsize (checks, checkmax, checkcnt, ); |
1269 |
checks [checkcnt - 1] = w; |
1270 |
} |
1271 |
|
1272 |
void |
1273 |
ev_check_stop (EV_P_ struct ev_check *w) |
1274 |
{ |
1275 |
ev_clear_pending (EV_A_ (W)w); |
1276 |
if (ev_is_active (w)) |
1277 |
return; |
1278 |
|
1279 |
checks [((W)w)->active - 1] = checks [--checkcnt]; |
1280 |
ev_stop (EV_A_ (W)w); |
1281 |
} |
1282 |
|
1283 |
#ifndef SA_RESTART |
1284 |
# define SA_RESTART 0 |
1285 |
#endif |
1286 |
|
1287 |
void |
1288 |
ev_signal_start (EV_P_ struct ev_signal *w) |
1289 |
{ |
1290 |
#if EV_MULTIPLICITY |
1291 |
assert (("signal watchers are only supported in the default loop", loop == default_loop)); |
1292 |
#endif |
1293 |
if (ev_is_active (w)) |
1294 |
return; |
1295 |
|
1296 |
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
1297 |
|
1298 |
ev_start (EV_A_ (W)w, 1); |
1299 |
array_needsize (signals, signalmax, w->signum, signals_init); |
1300 |
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
1301 |
|
1302 |
if (!((WL)w)->next) |
1303 |
{ |
1304 |
struct sigaction sa; |
1305 |
sa.sa_handler = sighandler; |
1306 |
sigfillset (&sa.sa_mask); |
1307 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
1308 |
sigaction (w->signum, &sa, 0); |
1309 |
} |
1310 |
} |
1311 |
|
1312 |
void |
1313 |
ev_signal_stop (EV_P_ struct ev_signal *w) |
1314 |
{ |
1315 |
ev_clear_pending (EV_A_ (W)w); |
1316 |
if (!ev_is_active (w)) |
1317 |
return; |
1318 |
|
1319 |
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
1320 |
ev_stop (EV_A_ (W)w); |
1321 |
|
1322 |
if (!signals [w->signum - 1].head) |
1323 |
signal (w->signum, SIG_DFL); |
1324 |
} |
1325 |
|
1326 |
void |
1327 |
ev_child_start (EV_P_ struct ev_child *w) |
1328 |
{ |
1329 |
#if EV_MULTIPLICITY |
1330 |
assert (("child watchers are only supported in the default loop", loop == default_loop)); |
1331 |
#endif |
1332 |
if (ev_is_active (w)) |
1333 |
return; |
1334 |
|
1335 |
ev_start (EV_A_ (W)w, 1); |
1336 |
wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
1337 |
} |
1338 |
|
1339 |
void |
1340 |
ev_child_stop (EV_P_ struct ev_child *w) |
1341 |
{ |
1342 |
ev_clear_pending (EV_A_ (W)w); |
1343 |
if (ev_is_active (w)) |
1344 |
return; |
1345 |
|
1346 |
wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
1347 |
ev_stop (EV_A_ (W)w); |
1348 |
} |
1349 |
|
1350 |
/*****************************************************************************/ |
1351 |
|
1352 |
struct ev_once |
1353 |
{ |
1354 |
struct ev_io io; |
1355 |
struct ev_timer to; |
1356 |
void (*cb)(int revents, void *arg); |
1357 |
void *arg; |
1358 |
}; |
1359 |
|
1360 |
static void |
1361 |
once_cb (EV_P_ struct ev_once *once, int revents) |
1362 |
{ |
1363 |
void (*cb)(int revents, void *arg) = once->cb; |
1364 |
void *arg = once->arg; |
1365 |
|
1366 |
ev_io_stop (EV_A_ &once->io); |
1367 |
ev_timer_stop (EV_A_ &once->to); |
1368 |
free (once); |
1369 |
|
1370 |
cb (revents, arg); |
1371 |
} |
1372 |
|
1373 |
static void |
1374 |
once_cb_io (EV_P_ struct ev_io *w, int revents) |
1375 |
{ |
1376 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
1377 |
} |
1378 |
|
1379 |
static void |
1380 |
once_cb_to (EV_P_ struct ev_timer *w, int revents) |
1381 |
{ |
1382 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
1383 |
} |
1384 |
|
1385 |
void |
1386 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
1387 |
{ |
1388 |
struct ev_once *once = malloc (sizeof (struct ev_once)); |
1389 |
|
1390 |
if (!once) |
1391 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
1392 |
else |
1393 |
{ |
1394 |
once->cb = cb; |
1395 |
once->arg = arg; |
1396 |
|
1397 |
ev_watcher_init (&once->io, once_cb_io); |
1398 |
if (fd >= 0) |
1399 |
{ |
1400 |
ev_io_set (&once->io, fd, events); |
1401 |
ev_io_start (EV_A_ &once->io); |
1402 |
} |
1403 |
|
1404 |
ev_watcher_init (&once->to, once_cb_to); |
1405 |
if (timeout >= 0.) |
1406 |
{ |
1407 |
ev_timer_set (&once->to, timeout, 0.); |
1408 |
ev_timer_start (EV_A_ &once->to); |
1409 |
} |
1410 |
} |
1411 |
} |
1412 |
|