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Comparing libev/ev.c (file contents):
Revision 1.172 by root, Sun Dec 9 02:27:44 2007 UTC vs.
Revision 1.238 by root, Thu May 8 20:49:12 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* 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.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
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	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
37	# ifdef EV_CONFIG_H	46	# ifdef EV_CONFIG_H
38	# include EV_CONFIG_H	47	# include EV_CONFIG_H
39	# else	48	# else
40	# include "config.h"	49	# include "config.h"
…		…
51	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	61	# define EV_USE_MONOTONIC 0
53	# endif	62	# endif
54	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
56	# endif	73	# endif
57	# endif	74	# endif
58		75
59	# ifndef EV_USE_SELECT	76	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
102	# else	119	# else
103	# define EV_USE_INOTIFY 0	120	# define EV_USE_INOTIFY 0
104	# endif	121	# endif
105	# endif	122	# endif
106		123
		124	# 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
107	#endif	132	#endif
108		133
109	#include <math.h>	134	#include <math.h>
110	#include <stdlib.h>	135	#include <stdlib.h>
111	#include <fcntl.h>	136	#include <fcntl.h>
…		…
136	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
137	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
138	# endif	163	# endif
139	#endif	164	#endif
140		165
141	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
142		167
143	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
144	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
145	#endif	170	#endif
146		171
147	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
149	#endif	178	#endif
150		179
151	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
153	#endif	182	#endif
…		…
159	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
160	# endif	189	# endif
161	#endif	190	#endif
162		191
163	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
164	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
165	#endif	198	#endif
166		199
167	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
168	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
169	#endif	202	#endif
…		…
171	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
172	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
173	#endif	206	#endif
174		207
175	#ifndef EV_USE_INOTIFY	208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
176	# define EV_USE_INOTIFY 0	212	# define EV_USE_INOTIFY 0
		213	# endif
177	#endif	214	#endif
178		215
179	#ifndef EV_PID_HASHSIZE	216	#ifndef EV_PID_HASHSIZE
180	# if EV_MINIMAL	217	# if EV_MINIMAL
181	# define EV_PID_HASHSIZE 1	218	# define EV_PID_HASHSIZE 1
…		…
190	# else	227	# else
191	# define EV_INOTIFY_HASHSIZE 16	228	# define EV_INOTIFY_HASHSIZE 16
192	# endif	229	# endif
193	#endif	230	#endif
194		231
195	/**/	232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196		241
197	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
198	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
199	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
200	#endif	245	#endif
…		…
202	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
203	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
204	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
205	#endif	250	#endif
206		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
207	#if EV_SELECT_IS_WINSOCKET	267	#if EV_SELECT_IS_WINSOCKET
208	# include <winsock.h>	268	# include <winsock.h>
209	#endif	269	#endif
210		270
211	#if !EV_STAT_ENABLE	271	#if EV_USE_EVENTFD
212	# define EV_USE_INOTIFY 0	272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
213	#endif	276	# endif
214		277	int eventfd (unsigned int initval, int flags);
215	#if EV_USE_INOTIFY	278	# ifdef __cplusplus
216	# include <sys/inotify.h>	279	}
		280	# endif
217	#endif	281	#endif
218		282
219	/**/	283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220		294
221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
224		298
225	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
226	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
227	# define noinline __attribute__ ((noinline))	301	# define noinline __attribute__ ((noinline))
228	#else	302	#else
229	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
230	# define noinline	304	# define noinline
231	# if __STDC_VERSION__ < 199901L	305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
232	# define inline	306	# define inline
233	# endif	307	# endif
234	#endif	308	#endif
235		309
236	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
251		325
252	typedef ev_watcher *W;	326	typedef ev_watcher *W;
253	typedef ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
254	typedef ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
255		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
256	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
257		338
258	#ifdef _WIN32	339	#ifdef _WIN32
259	# include "ev_win32.c"	340	# include "ev_win32.c"
260	#endif	341	#endif
261		342
…		…
282	perror (msg);	363	perror (msg);
283	abort ();	364	abort ();
284	}	365	}
285	}	366	}
286		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
287	static void *(*alloc)(void *ptr, long size);	383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
288		384
289	void	385	void
290	ev_set_allocator (void *(*cb)(void *ptr, long size))	386	ev_set_allocator (void *(*cb)(void *ptr, long size))
291	{	387	{
292	alloc = cb;	388	alloc = cb;
293	}	389	}
294		390
295	inline_speed void *	391	inline_speed void *
296	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
297	{	393	{
298	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
299		395
300	if (!ptr && size)	396	if (!ptr && size)
301	{	397	{
302	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
303	abort ();	399	abort ();
…		…
397	{	493	{
398	return ev_rt_now;	494	return ev_rt_now;
399	}	495	}
400	#endif	496	#endif
401		497
		498	void
		499	ev_sleep (ev_tstamp delay)
		500	{
		501	if (delay > 0.)
		502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
		522
		523	/*****************************************************************************/
		524
		525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		526
402	int inline_size	527	int inline_size
403	array_nextsize (int elem, int cur, int cnt)	528	array_nextsize (int elem, int cur, int cnt)
404	{	529	{
405	int ncur = cur + 1;	530	int ncur = cur + 1;
406		531
407	do	532	do
408	ncur <<= 1;	533	ncur <<= 1;
409	while (cnt > ncur);	534	while (cnt > ncur);
410		535
411	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	536	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
412	if (elem * ncur > 4096)	537	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
413	{	538	{
414	ncur *= elem;	539	ncur *= elem;
415	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;	540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
416	ncur = ncur - sizeof (void *) * 4;	541	ncur = ncur - sizeof (void *) * 4;
417	ncur /= elem;	542	ncur /= elem;
418	}	543	}
419		544
420	return ncur;	545	return ncur;
…		…
466	pendings [pri][w_->pending - 1].w = w_;	591	pendings [pri][w_->pending - 1].w = w_;
467	pendings [pri][w_->pending - 1].events = revents;	592	pendings [pri][w_->pending - 1].events = revents;
468	}	593	}
469	}	594	}
470		595
471	void inline_size	596	void inline_speed
472	queue_events (EV_P_ W *events, int eventcnt, int type)	597	queue_events (EV_P_ W *events, int eventcnt, int type)
473	{	598	{
474	int i;	599	int i;
475		600
476	for (i = 0; i < eventcnt; ++i)	601	for (i = 0; i < eventcnt; ++i)
…		…
523	{	648	{
524	int fd = fdchanges [i];	649	int fd = fdchanges [i];
525	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
526	ev_io *w;	651	ev_io *w;
527		652
528	int events = 0;	653	unsigned char events = 0;
529		654
530	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
531	events |= w->events;	656	events |= (unsigned char)w->events;
532		657
533	#if EV_SELECT_IS_WINSOCKET	658	#if EV_SELECT_IS_WINSOCKET
534	if (events)	659	if (events)
535	{	660	{
536	unsigned long argp;	661	unsigned long argp;
		662	#ifdef EV_FD_TO_WIN32_HANDLE
		663	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		664	#else
537	anfd->handle = _get_osfhandle (fd);	665	anfd->handle = _get_osfhandle (fd);
		666	#endif
538	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	667	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
539	}	668	}
540	#endif	669	#endif
541		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
542	anfd->reify = 0;	675	anfd->reify = 0;
543
544	backend_modify (EV_A_ fd, anfd->events, events);
545	anfd->events = events;	676	anfd->events = events;
		677
		678	if (o_events != events || o_reify & EV_IOFDSET)
		679	backend_modify (EV_A_ fd, o_events, events);
		680	}
546	}	681	}
547		682
548	fdchangecnt = 0;	683	fdchangecnt = 0;
549	}	684	}
550		685
551	void inline_size	686	void inline_size
552	fd_change (EV_P_ int fd)	687	fd_change (EV_P_ int fd, int flags)
553	{	688	{
554	if (expect_false (anfds [fd].reify))	689	unsigned char reify = anfds [fd].reify;
555	return;
556
557	anfds [fd].reify = 1;	690	anfds [fd].reify |= flags;
558		691
		692	if (expect_true (!reify))
		693	{
559	++fdchangecnt;	694	++fdchangecnt;
560	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
561	fdchanges [fdchangecnt - 1] = fd;	696	fdchanges [fdchangecnt - 1] = fd;
		697	}
562	}	698	}
563		699
564	void inline_speed	700	void inline_speed
565	fd_kill (EV_P_ int fd)	701	fd_kill (EV_P_ int fd)
566	{	702	{
…		…
617		753
618	for (fd = 0; fd < anfdmax; ++fd)	754	for (fd = 0; fd < anfdmax; ++fd)
619	if (anfds [fd].events)	755	if (anfds [fd].events)
620	{	756	{
621	anfds [fd].events = 0;	757	anfds [fd].events = 0;
622	fd_change (EV_A_ fd);	758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
623	}	759	}
624	}	760	}
625		761
626	/*****************************************************************************/	762	/*****************************************************************************/
627		763
		764	/*
		765	* at the moment we allow libev the luxury of two heaps,
		766	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		767	* which is more cache-efficient.
		768	* the difference is about 5% with 50000+ watchers.
		769	*/
		770	#define USE_4HEAP !EV_MINIMAL
		771	#define USE_4HEAP 1/* they do not work corretcly */
		772	#if USE_4HEAP
		773
		774	#define DHEAP 4
		775	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		776
		777	/* towards the root */
628	void inline_speed	778	void inline_speed
629	upheap (WT *heap, int k)	779	upheap (WT *heap, int k)
630	{	780	{
631	WT w = heap [k];	781	WT w = heap [k];
632		782
633	while (k && heap [k >> 1]->at > w->at)	783	for (;;)
634	{	784	{
		785	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		786
		787	if (p == k || heap [p]->at <= w->at)
		788	break;
		789
635	heap [k] = heap [k >> 1];	790	heap [k] = heap [p];
636	((W)heap [k])->active = k + 1;	791	ev_active (heap [k]) = k;
637	k >>= 1;	792	k = p;
638	}	793	}
639		794
640	heap [k] = w;	795	heap [k] = w;
641	((W)heap [k])->active = k + 1;	796	ev_active (heap [k]) = k;
642
643	}	797	}
644		798
		799	/* away from the root */
645	void inline_speed	800	void inline_speed
646	downheap (WT *heap, int N, int k)	801	downheap (WT *heap, int N, int k)
647	{	802	{
648	WT w = heap [k];	803	WT w = heap [k];
		804	WT *E = heap + N + HEAP0;
649		805
650	while (k < (N >> 1))	806	for (;;)
651	{	807	{
652	int j = k << 1;	808	ev_tstamp minat;
		809	WT *minpos;
		810	WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
653		811
654	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	812	// find minimum child
		813	if (expect_true (pos + DHEAP - 1 < E))
655	++j;	814	{
		815	/* fast path */
		816	(minpos = pos + 0), (minat = (*minpos)->at);
		817	if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		818	if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		819	if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		820	}
		821	else
		822	{
		823	/* slow path */
		824	if (pos >= E)
		825	break;
		826	(minpos = pos + 0), (minat = (*minpos)->at);
		827	if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		828	if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		829	if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		830	}
656		831
657	if (w->at <= heap [j]->at)	832	if (w->at <= minat)
658	break;	833	break;
659		834
660	heap [k] = heap [j];	835	ev_active (*minpos) = k;
661	((W)heap [k])->active = k + 1;	836	heap [k] = *minpos;
662	k = j;	837
		838	k = minpos - heap;
663	}	839	}
664		840
665	heap [k] = w;	841	heap [k] = w;
		842	ev_active (heap [k]) = k;
		843	}
		844
		845	#else // 4HEAP
		846
		847	#define HEAP0 1
		848
		849	/* towards the root */
		850	void inline_speed
		851	upheap (WT *heap, int k)
		852	{
		853	WT w = heap [k];
		854
		855	for (;;)
		856	{
		857	int p = k >> 1;
		858
		859	/* maybe we could use a dummy element at heap [0]? */
		860	if (!p || heap [p]->at <= w->at)
		861	break;
		862
		863	heap [k] = heap [p];
		864	ev_active (heap [k]) = k;
		865	k = p;
		866	}
		867
		868	heap [k] = w;
		869	ev_active (heap [k]) = k;
		870	}
		871
		872	/* away from the root */
		873	void inline_speed
		874	downheap (WT *heap, int N, int k)
		875	{
		876	WT w = heap [k];
		877
		878	for (;;)
		879	{
		880	int c = k << 1;
		881
		882	if (c > N)
		883	break;
		884
		885	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		886	? 1 : 0;
		887
		888	if (w->at <= heap [c]->at)
		889	break;
		890
		891	heap [k] = heap [c];
666	((W)heap [k])->active = k + 1;	892	((W)heap [k])->active = k;
		893
		894	k = c;
		895	}
		896
		897	heap [k] = w;
		898	ev_active (heap [k]) = k;
667	}	899	}
		900	#endif
668		901
669	void inline_size	902	void inline_size
670	adjustheap (WT *heap, int N, int k)	903	adjustheap (WT *heap, int N, int k)
671	{	904	{
672	upheap (heap, k);	905	upheap (heap, k);
…		…
676	/*****************************************************************************/	909	/*****************************************************************************/
677		910
678	typedef struct	911	typedef struct
679	{	912	{
680	WL head;	913	WL head;
681	sig_atomic_t volatile gotsig;	914	EV_ATOMIC_T gotsig;
682	} ANSIG;	915	} ANSIG;
683		916
684	static ANSIG *signals;	917	static ANSIG *signals;
685	static int signalmax;	918	static int signalmax;
686		919
687	static int sigpipe [2];	920	static EV_ATOMIC_T gotsig;
688	static sig_atomic_t volatile gotsig;
689	static ev_io sigev;
690		921
691	void inline_size	922	void inline_size
692	signals_init (ANSIG *base, int count)	923	signals_init (ANSIG *base, int count)
693	{	924	{
694	while (count--)	925	while (count--)
…		…
698		929
699	++base;	930	++base;
700	}	931	}
701	}	932	}
702		933
703	static void	934	/*****************************************************************************/
704	sighandler (int signum)
705	{
706	#if _WIN32
707	signal (signum, sighandler);
708	#endif
709
710	signals [signum - 1].gotsig = 1;
711
712	if (!gotsig)
713	{
714	int old_errno = errno;
715	gotsig = 1;
716	write (sigpipe [1], &signum, 1);
717	errno = old_errno;
718	}
719	}
720
721	void noinline
722	ev_feed_signal_event (EV_P_ int signum)
723	{
724	WL w;
725
726	#if EV_MULTIPLICITY
727	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
728	#endif
729
730	--signum;
731
732	if (signum < 0 || signum >= signalmax)
733	return;
734
735	signals [signum].gotsig = 0;
736
737	for (w = signals [signum].head; w; w = w->next)
738	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
739	}
740
741	static void
742	sigcb (EV_P_ ev_io *iow, int revents)
743	{
744	int signum;
745
746	read (sigpipe [0], &revents, 1);
747	gotsig = 0;
748
749	for (signum = signalmax; signum--; )
750	if (signals [signum].gotsig)
751	ev_feed_signal_event (EV_A_ signum + 1);
752	}
753		935
754	void inline_speed	936	void inline_speed
755	fd_intern (int fd)	937	fd_intern (int fd)
756	{	938	{
757	#ifdef _WIN32	939	#ifdef _WIN32
…		…
762	fcntl (fd, F_SETFL, O_NONBLOCK);	944	fcntl (fd, F_SETFL, O_NONBLOCK);
763	#endif	945	#endif
764	}	946	}
765		947
766	static void noinline	948	static void noinline
767	siginit (EV_P)	949	evpipe_init (EV_P)
768	{	950	{
		951	if (!ev_is_active (&pipeev))
		952	{
		953	#if EV_USE_EVENTFD
		954	if ((evfd = eventfd (0, 0)) >= 0)
		955	{
		956	evpipe [0] = -1;
		957	fd_intern (evfd);
		958	ev_io_set (&pipeev, evfd, EV_READ);
		959	}
		960	else
		961	#endif
		962	{
		963	while (pipe (evpipe))
		964	syserr ("(libev) error creating signal/async pipe");
		965
769	fd_intern (sigpipe [0]);	966	fd_intern (evpipe [0]);
770	fd_intern (sigpipe [1]);	967	fd_intern (evpipe [1]);
		968	ev_io_set (&pipeev, evpipe [0], EV_READ);
		969	}
771		970
772	ev_io_set (&sigev, sigpipe [0], EV_READ);
773	ev_io_start (EV_A_ &sigev);	971	ev_io_start (EV_A_ &pipeev);
774	ev_unref (EV_A); /* child watcher should not keep loop alive */	972	ev_unref (EV_A); /* watcher should not keep loop alive */
		973	}
		974	}
		975
		976	void inline_size
		977	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		978	{
		979	if (!*flag)
		980	{
		981	int old_errno = errno; /* save errno because write might clobber it */
		982
		983	*flag = 1;
		984
		985	#if EV_USE_EVENTFD
		986	if (evfd >= 0)
		987	{
		988	uint64_t counter = 1;
		989	write (evfd, &counter, sizeof (uint64_t));
		990	}
		991	else
		992	#endif
		993	write (evpipe [1], &old_errno, 1);
		994
		995	errno = old_errno;
		996	}
		997	}
		998
		999	static void
		1000	pipecb (EV_P_ ev_io *iow, int revents)
		1001	{
		1002	#if EV_USE_EVENTFD
		1003	if (evfd >= 0)
		1004	{
		1005	uint64_t counter;
		1006	read (evfd, &counter, sizeof (uint64_t));
		1007	}
		1008	else
		1009	#endif
		1010	{
		1011	char dummy;
		1012	read (evpipe [0], &dummy, 1);
		1013	}
		1014
		1015	if (gotsig && ev_is_default_loop (EV_A))
		1016	{
		1017	int signum;
		1018	gotsig = 0;
		1019
		1020	for (signum = signalmax; signum--; )
		1021	if (signals [signum].gotsig)
		1022	ev_feed_signal_event (EV_A_ signum + 1);
		1023	}
		1024
		1025	#if EV_ASYNC_ENABLE
		1026	if (gotasync)
		1027	{
		1028	int i;
		1029	gotasync = 0;
		1030
		1031	for (i = asynccnt; i--; )
		1032	if (asyncs [i]->sent)
		1033	{
		1034	asyncs [i]->sent = 0;
		1035	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1036	}
		1037	}
		1038	#endif
775	}	1039	}
776		1040
777	/*****************************************************************************/	1041	/*****************************************************************************/
778		1042
		1043	static void
		1044	ev_sighandler (int signum)
		1045	{
		1046	#if EV_MULTIPLICITY
		1047	struct ev_loop *loop = &default_loop_struct;
		1048	#endif
		1049
		1050	#if _WIN32
		1051	signal (signum, ev_sighandler);
		1052	#endif
		1053
		1054	signals [signum - 1].gotsig = 1;
		1055	evpipe_write (EV_A_ &gotsig);
		1056	}
		1057
		1058	void noinline
		1059	ev_feed_signal_event (EV_P_ int signum)
		1060	{
		1061	WL w;
		1062
		1063	#if EV_MULTIPLICITY
		1064	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1065	#endif
		1066
		1067	--signum;
		1068
		1069	if (signum < 0 || signum >= signalmax)
		1070	return;
		1071
		1072	signals [signum].gotsig = 0;
		1073
		1074	for (w = signals [signum].head; w; w = w->next)
		1075	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1076	}
		1077
		1078	/*****************************************************************************/
		1079
779	static ev_child *childs [EV_PID_HASHSIZE];	1080	static WL childs [EV_PID_HASHSIZE];
780		1081
781	#ifndef _WIN32	1082	#ifndef _WIN32
782		1083
783	static ev_signal childev;	1084	static ev_signal childev;
784		1085
		1086	#ifndef WIFCONTINUED
		1087	# define WIFCONTINUED(status) 0
		1088	#endif
		1089
785	void inline_speed	1090	void inline_speed
786	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1091	child_reap (EV_P_ int chain, int pid, int status)
787	{	1092	{
788	ev_child *w;	1093	ev_child *w;
		1094	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
789		1095
790	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1096	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1097	{
791	if (w->pid == pid || !w->pid)	1098	if ((w->pid == pid || !w->pid)
		1099	&& (!traced || (w->flags & 1)))
792	{	1100	{
793	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */	1101	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
794	w->rpid = pid;	1102	w->rpid = pid;
795	w->rstatus = status;	1103	w->rstatus = status;
796	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1104	ev_feed_event (EV_A_ (W)w, EV_CHILD);
797	}	1105	}
		1106	}
798	}	1107	}
799		1108
800	#ifndef WCONTINUED	1109	#ifndef WCONTINUED
801	# define WCONTINUED 0	1110	# define WCONTINUED 0
802	#endif	1111	#endif
…		…
811	if (!WCONTINUED	1120	if (!WCONTINUED
812	|| errno != EINVAL	1121	|| errno != EINVAL
813	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))	1122	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
814	return;	1123	return;
815		1124
816	/* make sure we are called again until all childs have been reaped */	1125	/* make sure we are called again until all children have been reaped */
817	/* we need to do it this way so that the callback gets called before we continue */	1126	/* we need to do it this way so that the callback gets called before we continue */
818	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1127	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819		1128
820	child_reap (EV_A_ sw, pid, pid, status);	1129	child_reap (EV_A_ pid, pid, status);
821	if (EV_PID_HASHSIZE > 1)	1130	if (EV_PID_HASHSIZE > 1)
822	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1131	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823	}	1132	}
824		1133
825	#endif	1134	#endif
826		1135
827	/*****************************************************************************/	1136	/*****************************************************************************/
…		…
899	}	1208	}
900		1209
901	unsigned int	1210	unsigned int
902	ev_embeddable_backends (void)	1211	ev_embeddable_backends (void)
903	{	1212	{
904	return EVBACKEND_EPOLL	1213	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
905	| EVBACKEND_KQUEUE	1214
906	| EVBACKEND_PORT;	1215	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1216	/* please fix it and tell me how to detect the fix */
		1217	flags &= ~EVBACKEND_EPOLL;
		1218
		1219	return flags;
907	}	1220	}
908		1221
909	unsigned int	1222	unsigned int
910	ev_backend (EV_P)	1223	ev_backend (EV_P)
911	{	1224	{
…		…
914		1227
915	unsigned int	1228	unsigned int
916	ev_loop_count (EV_P)	1229	ev_loop_count (EV_P)
917	{	1230	{
918	return loop_count;	1231	return loop_count;
		1232	}
		1233
		1234	void
		1235	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1236	{
		1237	io_blocktime = interval;
		1238	}
		1239
		1240	void
		1241	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1242	{
		1243	timeout_blocktime = interval;
919	}	1244	}
920		1245
921	static void noinline	1246	static void noinline
922	loop_init (EV_P_ unsigned int flags)	1247	loop_init (EV_P_ unsigned int flags)
923	{	1248	{
…		…
929	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1254	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930	have_monotonic = 1;	1255	have_monotonic = 1;
931	}	1256	}
932	#endif	1257	#endif
933		1258
934	ev_rt_now = ev_time ();	1259	ev_rt_now = ev_time ();
935	mn_now = get_clock ();	1260	mn_now = get_clock ();
936	now_floor = mn_now;	1261	now_floor = mn_now;
937	rtmn_diff = ev_rt_now - mn_now;	1262	rtmn_diff = ev_rt_now - mn_now;
		1263
		1264	io_blocktime = 0.;
		1265	timeout_blocktime = 0.;
		1266	backend = 0;
		1267	backend_fd = -1;
		1268	gotasync = 0;
		1269	#if EV_USE_INOTIFY
		1270	fs_fd = -2;
		1271	#endif
938		1272
939	/* pid check not overridable via env */	1273	/* pid check not overridable via env */
940	#ifndef _WIN32	1274	#ifndef _WIN32
941	if (flags & EVFLAG_FORKCHECK)	1275	if (flags & EVFLAG_FORKCHECK)
942	curpid = getpid ();	1276	curpid = getpid ();
…		…
945	if (!(flags & EVFLAG_NOENV)	1279	if (!(flags & EVFLAG_NOENV)
946	&& !enable_secure ()	1280	&& !enable_secure ()
947	&& getenv ("LIBEV_FLAGS"))	1281	&& getenv ("LIBEV_FLAGS"))
948	flags = atoi (getenv ("LIBEV_FLAGS"));	1282	flags = atoi (getenv ("LIBEV_FLAGS"));
949		1283
950	if (!(flags & 0x0000ffffUL))	1284	if (!(flags & 0x0000ffffU))
951	flags |= ev_recommended_backends ();	1285	flags |= ev_recommended_backends ();
952
953	backend = 0;
954	backend_fd = -1;
955	#if EV_USE_INOTIFY
956	fs_fd = -2;
957	#endif
958		1286
959	#if EV_USE_PORT	1287	#if EV_USE_PORT
960	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1288	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961	#endif	1289	#endif
962	#if EV_USE_KQUEUE	1290	#if EV_USE_KQUEUE
…		…
970	#endif	1298	#endif
971	#if EV_USE_SELECT	1299	#if EV_USE_SELECT
972	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1300	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973	#endif	1301	#endif
974		1302
975	ev_init (&sigev, sigcb);	1303	ev_init (&pipeev, pipecb);
976	ev_set_priority (&sigev, EV_MAXPRI);	1304	ev_set_priority (&pipeev, EV_MAXPRI);
977	}	1305	}
978	}	1306	}
979		1307
980	static void noinline	1308	static void noinline
981	loop_destroy (EV_P)	1309	loop_destroy (EV_P)
982	{	1310	{
983	int i;	1311	int i;
		1312
		1313	if (ev_is_active (&pipeev))
		1314	{
		1315	ev_ref (EV_A); /* signal watcher */
		1316	ev_io_stop (EV_A_ &pipeev);
		1317
		1318	#if EV_USE_EVENTFD
		1319	if (evfd >= 0)
		1320	close (evfd);
		1321	#endif
		1322
		1323	if (evpipe [0] >= 0)
		1324	{
		1325	close (evpipe [0]);
		1326	close (evpipe [1]);
		1327	}
		1328	}
984		1329
985	#if EV_USE_INOTIFY	1330	#if EV_USE_INOTIFY
986	if (fs_fd >= 0)	1331	if (fs_fd >= 0)
987	close (fs_fd);	1332	close (fs_fd);
988	#endif	1333	#endif
…		…
1011	array_free (pending, [i]);	1356	array_free (pending, [i]);
1012	#if EV_IDLE_ENABLE	1357	#if EV_IDLE_ENABLE
1013	array_free (idle, [i]);	1358	array_free (idle, [i]);
1014	#endif	1359	#endif
1015	}	1360	}
		1361
		1362	ev_free (anfds); anfdmax = 0;
1016		1363
1017	/* have to use the microsoft-never-gets-it-right macro */	1364	/* have to use the microsoft-never-gets-it-right macro */
1018	array_free (fdchange, EMPTY);	1365	array_free (fdchange, EMPTY);
1019	array_free (timer, EMPTY);	1366	array_free (timer, EMPTY);
1020	#if EV_PERIODIC_ENABLE	1367	#if EV_PERIODIC_ENABLE
1021	array_free (periodic, EMPTY);	1368	array_free (periodic, EMPTY);
1022	#endif	1369	#endif
		1370	#if EV_FORK_ENABLE
		1371	array_free (fork, EMPTY);
		1372	#endif
1023	array_free (prepare, EMPTY);	1373	array_free (prepare, EMPTY);
1024	array_free (check, EMPTY);	1374	array_free (check, EMPTY);
		1375	#if EV_ASYNC_ENABLE
		1376	array_free (async, EMPTY);
		1377	#endif
1025		1378
1026	backend = 0;	1379	backend = 0;
1027	}	1380	}
1028		1381
		1382	#if EV_USE_INOTIFY
1029	void inline_size infy_fork (EV_P);	1383	void inline_size infy_fork (EV_P);
		1384	#endif
1030		1385
1031	void inline_size	1386	void inline_size
1032	loop_fork (EV_P)	1387	loop_fork (EV_P)
1033	{	1388	{
1034	#if EV_USE_PORT	1389	#if EV_USE_PORT
…		…
1042	#endif	1397	#endif
1043	#if EV_USE_INOTIFY	1398	#if EV_USE_INOTIFY
1044	infy_fork (EV_A);	1399	infy_fork (EV_A);
1045	#endif	1400	#endif
1046		1401
1047	if (ev_is_active (&sigev))	1402	if (ev_is_active (&pipeev))
1048	{	1403	{
1049	/* default loop */	1404	/* this "locks" the handlers against writing to the pipe */
		1405	/* while we modify the fd vars */
		1406	gotsig = 1;
		1407	#if EV_ASYNC_ENABLE
		1408	gotasync = 1;
		1409	#endif
1050		1410
1051	ev_ref (EV_A);	1411	ev_ref (EV_A);
1052	ev_io_stop (EV_A_ &sigev);	1412	ev_io_stop (EV_A_ &pipeev);
		1413
		1414	#if EV_USE_EVENTFD
		1415	if (evfd >= 0)
		1416	close (evfd);
		1417	#endif
		1418
		1419	if (evpipe [0] >= 0)
		1420	{
1053	close (sigpipe [0]);	1421	close (evpipe [0]);
1054	close (sigpipe [1]);	1422	close (evpipe [1]);
		1423	}
1055		1424
1056	while (pipe (sigpipe))
1057	syserr ("(libev) error creating pipe");
1058
1059	siginit (EV_A);	1425	evpipe_init (EV_A);
		1426	/* now iterate over everything, in case we missed something */
		1427	pipecb (EV_A_ &pipeev, EV_READ);
1060	}	1428	}
1061		1429
1062	postfork = 0;	1430	postfork = 0;
1063	}	1431	}
1064		1432
…		…
1086	}	1454	}
1087		1455
1088	void	1456	void
1089	ev_loop_fork (EV_P)	1457	ev_loop_fork (EV_P)
1090	{	1458	{
1091	postfork = 1;	1459	postfork = 1; /* must be in line with ev_default_fork */
1092	}	1460	}
1093
1094	#endif	1461	#endif
1095		1462
1096	#if EV_MULTIPLICITY	1463	#if EV_MULTIPLICITY
1097	struct ev_loop *	1464	struct ev_loop *
1098	ev_default_loop_init (unsigned int flags)	1465	ev_default_loop_init (unsigned int flags)
1099	#else	1466	#else
1100	int	1467	int
1101	ev_default_loop (unsigned int flags)	1468	ev_default_loop (unsigned int flags)
1102	#endif	1469	#endif
1103	{	1470	{
1104	if (sigpipe [0] == sigpipe [1])
1105	if (pipe (sigpipe))
1106	return 0;
1107
1108	if (!ev_default_loop_ptr)	1471	if (!ev_default_loop_ptr)
1109	{	1472	{
1110	#if EV_MULTIPLICITY	1473	#if EV_MULTIPLICITY
1111	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1474	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1112	#else	1475	#else
…		…
1115		1478
1116	loop_init (EV_A_ flags);	1479	loop_init (EV_A_ flags);
1117		1480
1118	if (ev_backend (EV_A))	1481	if (ev_backend (EV_A))
1119	{	1482	{
1120	siginit (EV_A);
1121
1122	#ifndef _WIN32	1483	#ifndef _WIN32
1123	ev_signal_init (&childev, childcb, SIGCHLD);	1484	ev_signal_init (&childev, childcb, SIGCHLD);
1124	ev_set_priority (&childev, EV_MAXPRI);	1485	ev_set_priority (&childev, EV_MAXPRI);
1125	ev_signal_start (EV_A_ &childev);	1486	ev_signal_start (EV_A_ &childev);
1126	ev_unref (EV_A); /* child watcher should not keep loop alive */	1487	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1143	#ifndef _WIN32	1504	#ifndef _WIN32
1144	ev_ref (EV_A); /* child watcher */	1505	ev_ref (EV_A); /* child watcher */
1145	ev_signal_stop (EV_A_ &childev);	1506	ev_signal_stop (EV_A_ &childev);
1146	#endif	1507	#endif
1147		1508
1148	ev_ref (EV_A); /* signal watcher */
1149	ev_io_stop (EV_A_ &sigev);
1150
1151	close (sigpipe [0]); sigpipe [0] = 0;
1152	close (sigpipe [1]); sigpipe [1] = 0;
1153
1154	loop_destroy (EV_A);	1509	loop_destroy (EV_A);
1155	}	1510	}
1156		1511
1157	void	1512	void
1158	ev_default_fork (void)	1513	ev_default_fork (void)
…		…
1160	#if EV_MULTIPLICITY	1515	#if EV_MULTIPLICITY
1161	struct ev_loop *loop = ev_default_loop_ptr;	1516	struct ev_loop *loop = ev_default_loop_ptr;
1162	#endif	1517	#endif
1163		1518
1164	if (backend)	1519	if (backend)
1165	postfork = 1;	1520	postfork = 1; /* must be in line with ev_loop_fork */
1166	}	1521	}
1167		1522
1168	/*****************************************************************************/	1523	/*****************************************************************************/
1169		1524
1170	void	1525	void
…		…
1190	p->w->pending = 0;	1545	p->w->pending = 0;
1191	EV_CB_INVOKE (p->w, p->events);	1546	EV_CB_INVOKE (p->w, p->events);
1192	}	1547	}
1193	}	1548	}
1194	}	1549	}
1195
1196	void inline_size
1197	timers_reify (EV_P)
1198	{
1199	while (timercnt && ((WT)timers [0])->at <= mn_now)
1200	{
1201	ev_timer *w = timers [0];
1202
1203	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1204
1205	/* first reschedule or stop timer */
1206	if (w->repeat)
1207	{
1208	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1209
1210	((WT)w)->at += w->repeat;
1211	if (((WT)w)->at < mn_now)
1212	((WT)w)->at = mn_now;
1213
1214	downheap ((WT *)timers, timercnt, 0);
1215	}
1216	else
1217	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1218
1219	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1220	}
1221	}
1222
1223	#if EV_PERIODIC_ENABLE
1224	void inline_size
1225	periodics_reify (EV_P)
1226	{
1227	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1228	{
1229	ev_periodic *w = periodics [0];
1230
1231	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1232
1233	/* first reschedule or stop timer */
1234	if (w->reschedule_cb)
1235	{
1236	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1237	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1238	downheap ((WT *)periodics, periodiccnt, 0);
1239	}
1240	else if (w->interval)
1241	{
1242	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1243	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1244	downheap ((WT *)periodics, periodiccnt, 0);
1245	}
1246	else
1247	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1248
1249	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1250	}
1251	}
1252
1253	static void noinline
1254	periodics_reschedule (EV_P)
1255	{
1256	int i;
1257
1258	/* adjust periodics after time jump */
1259	for (i = 0; i < periodiccnt; ++i)
1260	{
1261	ev_periodic *w = periodics [i];
1262
1263	if (w->reschedule_cb)
1264	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1265	else if (w->interval)
1266	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1267	}
1268
1269	/* now rebuild the heap */
1270	for (i = periodiccnt >> 1; i--; )
1271	downheap ((WT *)periodics, periodiccnt, i);
1272	}
1273	#endif
1274		1550
1275	#if EV_IDLE_ENABLE	1551	#if EV_IDLE_ENABLE
1276	void inline_size	1552	void inline_size
1277	idle_reify (EV_P)	1553	idle_reify (EV_P)
1278	{	1554	{
…		…
1293	}	1569	}
1294	}	1570	}
1295	}	1571	}
1296	#endif	1572	#endif
1297		1573
1298	int inline_size	1574	void inline_size
1299	time_update_monotonic (EV_P)	1575	timers_reify (EV_P)
1300	{	1576	{
		1577	while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
		1578	{
		1579	ev_timer *w = (ev_timer *)timers [HEAP0];
		1580
		1581	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1582
		1583	/* first reschedule or stop timer */
		1584	if (w->repeat)
		1585	{
		1586	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1587
		1588	ev_at (w) += w->repeat;
		1589	if (ev_at (w) < mn_now)
		1590	ev_at (w) = mn_now;
		1591
		1592	downheap (timers, timercnt, HEAP0);
		1593	}
		1594	else
		1595	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1596
		1597	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1598	}
		1599	}
		1600
		1601	#if EV_PERIODIC_ENABLE
		1602	void inline_size
		1603	periodics_reify (EV_P)
		1604	{
		1605	while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
		1606	{
		1607	ev_periodic *w = (ev_periodic *)periodics [HEAP0];
		1608
		1609	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1610
		1611	/* first reschedule or stop timer */
		1612	if (w->reschedule_cb)
		1613	{
		1614	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1615	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1616	downheap (periodics, periodiccnt, 1);
		1617	}
		1618	else if (w->interval)
		1619	{
		1620	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1621	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1622	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1623	downheap (periodics, periodiccnt, HEAP0);
		1624	}
		1625	else
		1626	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1627
		1628	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1629	}
		1630	}
		1631
		1632	static void noinline
		1633	periodics_reschedule (EV_P)
		1634	{
		1635	int i;
		1636
		1637	/* adjust periodics after time jump */
		1638	for (i = 1; i <= periodiccnt; ++i)
		1639	{
		1640	ev_periodic *w = (ev_periodic *)periodics [i];
		1641
		1642	if (w->reschedule_cb)
		1643	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1644	else if (w->interval)
		1645	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1646	}
		1647
		1648	/* now rebuild the heap */
		1649	for (i = periodiccnt >> 1; --i; )
		1650	downheap (periodics, periodiccnt, i + HEAP0);
		1651	}
		1652	#endif
		1653
		1654	void inline_speed
		1655	time_update (EV_P_ ev_tstamp max_block)
		1656	{
		1657	int i;
		1658
		1659	#if EV_USE_MONOTONIC
		1660	if (expect_true (have_monotonic))
		1661	{
		1662	ev_tstamp odiff = rtmn_diff;
		1663
1301	mn_now = get_clock ();	1664	mn_now = get_clock ();
1302		1665
		1666	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1667	/* interpolate in the meantime */
1303	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1668	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304	{	1669	{
1305	ev_rt_now = rtmn_diff + mn_now;	1670	ev_rt_now = rtmn_diff + mn_now;
1306	return 0;	1671	return;
1307	}	1672	}
1308	else	1673
1309	{
1310	now_floor = mn_now;	1674	now_floor = mn_now;
1311	ev_rt_now = ev_time ();	1675	ev_rt_now = ev_time ();
1312	return 1;
1313	}
1314	}
1315		1676
1316	void inline_size	1677	/* loop a few times, before making important decisions.
1317	time_update (EV_P)	1678	* on the choice of "4": one iteration isn't enough,
1318	{	1679	* in case we get preempted during the calls to
1319	int i;	1680	* ev_time and get_clock. a second call is almost guaranteed
1320		1681	* to succeed in that case, though. and looping a few more times
1321	#if EV_USE_MONOTONIC	1682	* doesn't hurt either as we only do this on time-jumps or
1322	if (expect_true (have_monotonic))	1683	* in the unlikely event of having been preempted here.
1323	{	1684	*/
1324	if (time_update_monotonic (EV_A))	1685	for (i = 4; --i; )
1325	{	1686	{
1326	ev_tstamp odiff = rtmn_diff;
1327
1328	/* loop a few times, before making important decisions.
1329	* on the choice of "4": one iteration isn't enough,
1330	* in case we get preempted during the calls to
1331	* ev_time and get_clock. a second call is almost guaranteed
1332	* to succeed in that case, though. and looping a few more times
1333	* doesn't hurt either as we only do this on time-jumps or
1334	* in the unlikely event of having been preempted here.
1335	*/
1336	for (i = 4; --i; )
1337	{
1338	rtmn_diff = ev_rt_now - mn_now;	1687	rtmn_diff = ev_rt_now - mn_now;
1339		1688
1340	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1689	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1341	return; /* all is well */	1690	return; /* all is well */
1342		1691
1343	ev_rt_now = ev_time ();	1692	ev_rt_now = ev_time ();
1344	mn_now = get_clock ();	1693	mn_now = get_clock ();
1345	now_floor = mn_now;	1694	now_floor = mn_now;
1346	}	1695	}
1347		1696
1348	# if EV_PERIODIC_ENABLE	1697	# if EV_PERIODIC_ENABLE
1349	periodics_reschedule (EV_A);	1698	periodics_reschedule (EV_A);
1350	# endif	1699	# endif
1351	/* no timer adjustment, as the monotonic clock doesn't jump */	1700	/* no timer adjustment, as the monotonic clock doesn't jump */
1352	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1701	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353	}
1354	}	1702	}
1355	else	1703	else
1356	#endif	1704	#endif
1357	{	1705	{
1358	ev_rt_now = ev_time ();	1706	ev_rt_now = ev_time ();
1359		1707
1360	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1708	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361	{	1709	{
1362	#if EV_PERIODIC_ENABLE	1710	#if EV_PERIODIC_ENABLE
1363	periodics_reschedule (EV_A);	1711	periodics_reschedule (EV_A);
1364	#endif	1712	#endif
1365
1366	/* adjust timers. this is easy, as the offset is the same for all of them */	1713	/* adjust timers. this is easy, as the offset is the same for all of them */
1367	for (i = 0; i < timercnt; ++i)	1714	for (i = 1; i <= timercnt; ++i)
1368	((WT)timers [i])->at += ev_rt_now - mn_now;	1715	ev_at (timers [i]) += ev_rt_now - mn_now;
1369	}	1716	}
1370		1717
1371	mn_now = ev_rt_now;	1718	mn_now = ev_rt_now;
1372	}	1719	}
1373	}	1720	}
…		…
1387	static int loop_done;	1734	static int loop_done;
1388		1735
1389	void	1736	void
1390	ev_loop (EV_P_ int flags)	1737	ev_loop (EV_P_ int flags)
1391	{	1738	{
1392	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	1739	loop_done = EVUNLOOP_CANCEL;
1393	? EVUNLOOP_ONE
1394	: EVUNLOOP_CANCEL;
1395		1740
1396	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1741	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1397		1742
1398	do	1743	do
1399	{	1744	{
…		…
1433	/* update fd-related kernel structures */	1778	/* update fd-related kernel structures */
1434	fd_reify (EV_A);	1779	fd_reify (EV_A);
1435		1780
1436	/* calculate blocking time */	1781	/* calculate blocking time */
1437	{	1782	{
1438	ev_tstamp block;	1783	ev_tstamp waittime = 0.;
		1784	ev_tstamp sleeptime = 0.;
1439		1785
1440	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))	1786	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1441	block = 0.; /* do not block at all */
1442	else
1443	{	1787	{
1444	/* update time to cancel out callback processing overhead */	1788	/* update time to cancel out callback processing overhead */
1445	#if EV_USE_MONOTONIC
1446	if (expect_true (have_monotonic))
1447	time_update_monotonic (EV_A);	1789	time_update (EV_A_ 1e100);
1448	else
1449	#endif
1450	{
1451	ev_rt_now = ev_time ();
1452	mn_now = ev_rt_now;
1453	}
1454		1790
1455	block = MAX_BLOCKTIME;	1791	waittime = MAX_BLOCKTIME;
1456		1792
1457	if (timercnt)	1793	if (timercnt)
1458	{	1794	{
1459	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1795	ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
1460	if (block > to) block = to;	1796	if (waittime > to) waittime = to;
1461	}	1797	}
1462		1798
1463	#if EV_PERIODIC_ENABLE	1799	#if EV_PERIODIC_ENABLE
1464	if (periodiccnt)	1800	if (periodiccnt)
1465	{	1801	{
1466	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1802	ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1467	if (block > to) block = to;	1803	if (waittime > to) waittime = to;
1468	}	1804	}
1469	#endif	1805	#endif
1470		1806
1471	if (expect_false (block < 0.)) block = 0.;	1807	if (expect_false (waittime < timeout_blocktime))
		1808	waittime = timeout_blocktime;
		1809
		1810	sleeptime = waittime - backend_fudge;
		1811
		1812	if (expect_true (sleeptime > io_blocktime))
		1813	sleeptime = io_blocktime;
		1814
		1815	if (sleeptime)
		1816	{
		1817	ev_sleep (sleeptime);
		1818	waittime -= sleeptime;
		1819	}
1472	}	1820	}
1473		1821
1474	++loop_count;	1822	++loop_count;
1475	backend_poll (EV_A_ block);	1823	backend_poll (EV_A_ waittime);
		1824
		1825	/* update ev_rt_now, do magic */
		1826	time_update (EV_A_ waittime + sleeptime);
1476	}	1827	}
1477
1478	/* update ev_rt_now, do magic */
1479	time_update (EV_A);
1480		1828
1481	/* queue pending timers and reschedule them */	1829	/* queue pending timers and reschedule them */
1482	timers_reify (EV_A); /* relative timers called last */	1830	timers_reify (EV_A); /* relative timers called last */
1483	#if EV_PERIODIC_ENABLE	1831	#if EV_PERIODIC_ENABLE
1484	periodics_reify (EV_A); /* absolute timers called first */	1832	periodics_reify (EV_A); /* absolute timers called first */
…		…
1492	/* queue check watchers, to be executed first */	1840	/* queue check watchers, to be executed first */
1493	if (expect_false (checkcnt))	1841	if (expect_false (checkcnt))
1494	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1842	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1495		1843
1496	call_pending (EV_A);	1844	call_pending (EV_A);
1497
1498	}	1845	}
1499	while (expect_true (activecnt && !loop_done));	1846	while (expect_true (
		1847	activecnt
		1848	&& !loop_done
		1849	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1850	));
1500		1851
1501	if (loop_done == EVUNLOOP_ONE)	1852	if (loop_done == EVUNLOOP_ONE)
1502	loop_done = EVUNLOOP_CANCEL;	1853	loop_done = EVUNLOOP_CANCEL;
1503	}	1854	}
1504		1855
…		…
1595		1946
1596	assert (("ev_io_start called with negative fd", fd >= 0));	1947	assert (("ev_io_start called with negative fd", fd >= 0));
1597		1948
1598	ev_start (EV_A_ (W)w, 1);	1949	ev_start (EV_A_ (W)w, 1);
1599	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1950	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1600	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1951	wlist_add (&anfds[fd].head, (WL)w);
1601		1952
1602	fd_change (EV_A_ fd);	1953	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1954	w->events &= ~EV_IOFDSET;
1603	}	1955	}
1604		1956
1605	void noinline	1957	void noinline
1606	ev_io_stop (EV_P_ ev_io *w)	1958	ev_io_stop (EV_P_ ev_io *w)
1607	{	1959	{
…		…
1609	if (expect_false (!ev_is_active (w)))	1961	if (expect_false (!ev_is_active (w)))
1610	return;	1962	return;
1611		1963
1612	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1964	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1613		1965
1614	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1966	wlist_del (&anfds[w->fd].head, (WL)w);
1615	ev_stop (EV_A_ (W)w);	1967	ev_stop (EV_A_ (W)w);
1616		1968
1617	fd_change (EV_A_ w->fd);	1969	fd_change (EV_A_ w->fd, 1);
1618	}	1970	}
1619		1971
1620	void noinline	1972	void noinline
1621	ev_timer_start (EV_P_ ev_timer *w)	1973	ev_timer_start (EV_P_ ev_timer *w)
1622	{	1974	{
1623	if (expect_false (ev_is_active (w)))	1975	if (expect_false (ev_is_active (w)))
1624	return;	1976	return;
1625		1977
1626	((WT)w)->at += mn_now;	1978	ev_at (w) += mn_now;
1627		1979
1628	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1980	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1629		1981
1630	ev_start (EV_A_ (W)w, ++timercnt);	1982	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1631	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1983	array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
1632	timers [timercnt - 1] = w;	1984	timers [ev_active (w)] = (WT)w;
1633	upheap ((WT *)timers, timercnt - 1);	1985	upheap (timers, ev_active (w));
1634		1986
1635	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/	1987	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1636	}	1988	}
1637		1989
1638	void noinline	1990	void noinline
1639	ev_timer_stop (EV_P_ ev_timer *w)	1991	ev_timer_stop (EV_P_ ev_timer *w)
1640	{	1992	{
1641	clear_pending (EV_A_ (W)w);	1993	clear_pending (EV_A_ (W)w);
1642	if (expect_false (!ev_is_active (w)))	1994	if (expect_false (!ev_is_active (w)))
1643	return;	1995	return;
1644		1996
1645	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1646
1647	{	1997	{
1648	int active = ((W)w)->active;	1998	int active = ev_active (w);
1649		1999
		2000	assert (("internal timer heap corruption", timers [active] == (WT)w));
		2001
1650	if (expect_true (--active < --timercnt))	2002	if (expect_true (active < timercnt + HEAP0 - 1))
1651	{	2003	{
1652	timers [active] = timers [timercnt];	2004	timers [active] = timers [timercnt + HEAP0 - 1];
1653	adjustheap ((WT *)timers, timercnt, active);	2005	adjustheap (timers, timercnt, active);
1654	}	2006	}
		2007
		2008	--timercnt;
1655	}	2009	}
1656		2010
1657	((WT)w)->at -= mn_now;	2011	ev_at (w) -= mn_now;
1658		2012
1659	ev_stop (EV_A_ (W)w);	2013	ev_stop (EV_A_ (W)w);
1660	}	2014	}
1661		2015
1662	void noinline	2016	void noinline
…		…
1664	{	2018	{
1665	if (ev_is_active (w))	2019	if (ev_is_active (w))
1666	{	2020	{
1667	if (w->repeat)	2021	if (w->repeat)
1668	{	2022	{
1669	((WT)w)->at = mn_now + w->repeat;	2023	ev_at (w) = mn_now + w->repeat;
1670	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2024	adjustheap (timers, timercnt, ev_active (w));
1671	}	2025	}
1672	else	2026	else
1673	ev_timer_stop (EV_A_ w);	2027	ev_timer_stop (EV_A_ w);
1674	}	2028	}
1675	else if (w->repeat)	2029	else if (w->repeat)
1676	{	2030	{
1677	w->at = w->repeat;	2031	ev_at (w) = w->repeat;
1678	ev_timer_start (EV_A_ w);	2032	ev_timer_start (EV_A_ w);
1679	}	2033	}
1680	}	2034	}
1681		2035
1682	#if EV_PERIODIC_ENABLE	2036	#if EV_PERIODIC_ENABLE
…		…
1685	{	2039	{
1686	if (expect_false (ev_is_active (w)))	2040	if (expect_false (ev_is_active (w)))
1687	return;	2041	return;
1688		2042
1689	if (w->reschedule_cb)	2043	if (w->reschedule_cb)
1690	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2044	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1691	else if (w->interval)	2045	else if (w->interval)
1692	{	2046	{
1693	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2047	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1694	/* this formula differs from the one in periodic_reify because we do not always round up */	2048	/* this formula differs from the one in periodic_reify because we do not always round up */
1695	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2049	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1696	}	2050	}
		2051	else
		2052	ev_at (w) = w->offset;
1697		2053
1698	ev_start (EV_A_ (W)w, ++periodiccnt);	2054	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1699	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2055	array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
1700	periodics [periodiccnt - 1] = w;	2056	periodics [ev_active (w)] = (WT)w;
1701	upheap ((WT *)periodics, periodiccnt - 1);	2057	upheap (periodics, ev_active (w));
1702		2058
1703	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	2059	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1704	}	2060	}
1705		2061
1706	void noinline	2062	void noinline
1707	ev_periodic_stop (EV_P_ ev_periodic *w)	2063	ev_periodic_stop (EV_P_ ev_periodic *w)
1708	{	2064	{
1709	clear_pending (EV_A_ (W)w);	2065	clear_pending (EV_A_ (W)w);
1710	if (expect_false (!ev_is_active (w)))	2066	if (expect_false (!ev_is_active (w)))
1711	return;	2067	return;
1712		2068
1713	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1714
1715	{	2069	{
1716	int active = ((W)w)->active;	2070	int active = ev_active (w);
1717		2071
		2072	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		2073
1718	if (expect_true (--active < --periodiccnt))	2074	if (expect_true (active < periodiccnt + HEAP0 - 1))
1719	{	2075	{
1720	periodics [active] = periodics [periodiccnt];	2076	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1721	adjustheap ((WT *)periodics, periodiccnt, active);	2077	adjustheap (periodics, periodiccnt, active);
1722	}	2078	}
		2079
		2080	--periodiccnt;
1723	}	2081	}
1724		2082
1725	ev_stop (EV_A_ (W)w);	2083	ev_stop (EV_A_ (W)w);
1726	}	2084	}
1727		2085
…		…
1747	if (expect_false (ev_is_active (w)))	2105	if (expect_false (ev_is_active (w)))
1748	return;	2106	return;
1749		2107
1750	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2108	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1751		2109
		2110	evpipe_init (EV_A);
		2111
		2112	{
		2113	#ifndef _WIN32
		2114	sigset_t full, prev;
		2115	sigfillset (&full);
		2116	sigprocmask (SIG_SETMASK, &full, &prev);
		2117	#endif
		2118
		2119	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2120
		2121	#ifndef _WIN32
		2122	sigprocmask (SIG_SETMASK, &prev, 0);
		2123	#endif
		2124	}
		2125
1752	ev_start (EV_A_ (W)w, 1);	2126	ev_start (EV_A_ (W)w, 1);
1753	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1754	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2127	wlist_add (&signals [w->signum - 1].head, (WL)w);
1755		2128
1756	if (!((WL)w)->next)	2129	if (!((WL)w)->next)
1757	{	2130	{
1758	#if _WIN32	2131	#if _WIN32
1759	signal (w->signum, sighandler);	2132	signal (w->signum, ev_sighandler);
1760	#else	2133	#else
1761	struct sigaction sa;	2134	struct sigaction sa;
1762	sa.sa_handler = sighandler;	2135	sa.sa_handler = ev_sighandler;
1763	sigfillset (&sa.sa_mask);	2136	sigfillset (&sa.sa_mask);
1764	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2137	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1765	sigaction (w->signum, &sa, 0);	2138	sigaction (w->signum, &sa, 0);
1766	#endif	2139	#endif
1767	}	2140	}
…		…
1772	{	2145	{
1773	clear_pending (EV_A_ (W)w);	2146	clear_pending (EV_A_ (W)w);
1774	if (expect_false (!ev_is_active (w)))	2147	if (expect_false (!ev_is_active (w)))
1775	return;	2148	return;
1776		2149
1777	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2150	wlist_del (&signals [w->signum - 1].head, (WL)w);
1778	ev_stop (EV_A_ (W)w);	2151	ev_stop (EV_A_ (W)w);
1779		2152
1780	if (!signals [w->signum - 1].head)	2153	if (!signals [w->signum - 1].head)
1781	signal (w->signum, SIG_DFL);	2154	signal (w->signum, SIG_DFL);
1782	}	2155	}
…		…
1789	#endif	2162	#endif
1790	if (expect_false (ev_is_active (w)))	2163	if (expect_false (ev_is_active (w)))
1791	return;	2164	return;
1792		2165
1793	ev_start (EV_A_ (W)w, 1);	2166	ev_start (EV_A_ (W)w, 1);
1794	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2167	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1795	}	2168	}
1796		2169
1797	void	2170	void
1798	ev_child_stop (EV_P_ ev_child *w)	2171	ev_child_stop (EV_P_ ev_child *w)
1799	{	2172	{
1800	clear_pending (EV_A_ (W)w);	2173	clear_pending (EV_A_ (W)w);
1801	if (expect_false (!ev_is_active (w)))	2174	if (expect_false (!ev_is_active (w)))
1802	return;	2175	return;
1803		2176
1804	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2177	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1805	ev_stop (EV_A_ (W)w);	2178	ev_stop (EV_A_ (W)w);
1806	}	2179	}
1807		2180
1808	#if EV_STAT_ENABLE	2181	#if EV_STAT_ENABLE
1809		2182
…		…
1828	if (w->wd < 0)	2201	if (w->wd < 0)
1829	{	2202	{
1830	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2203	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1831		2204
1832	/* monitor some parent directory for speedup hints */	2205	/* monitor some parent directory for speedup hints */
		2206	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2207	/* but an efficiency issue only */
1833	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2208	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1834	{	2209	{
1835	char path [4096];	2210	char path [4096];
1836	strcpy (path, w->path);	2211	strcpy (path, w->path);
1837		2212
…		…
2082	clear_pending (EV_A_ (W)w);	2457	clear_pending (EV_A_ (W)w);
2083	if (expect_false (!ev_is_active (w)))	2458	if (expect_false (!ev_is_active (w)))
2084	return;	2459	return;
2085		2460
2086	{	2461	{
2087	int active = ((W)w)->active;	2462	int active = ev_active (w);
2088		2463
2089	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2464	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2090	((W)idles [ABSPRI (w)][active - 1])->active = active;	2465	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2091		2466
2092	ev_stop (EV_A_ (W)w);	2467	ev_stop (EV_A_ (W)w);
2093	--idleall;	2468	--idleall;
2094	}	2469	}
2095	}	2470	}
…		…
2112	clear_pending (EV_A_ (W)w);	2487	clear_pending (EV_A_ (W)w);
2113	if (expect_false (!ev_is_active (w)))	2488	if (expect_false (!ev_is_active (w)))
2114	return;	2489	return;
2115		2490
2116	{	2491	{
2117	int active = ((W)w)->active;	2492	int active = ev_active (w);
		2493
2118	prepares [active - 1] = prepares [--preparecnt];	2494	prepares [active - 1] = prepares [--preparecnt];
2119	((W)prepares [active - 1])->active = active;	2495	ev_active (prepares [active - 1]) = active;
2120	}	2496	}
2121		2497
2122	ev_stop (EV_A_ (W)w);	2498	ev_stop (EV_A_ (W)w);
2123	}	2499	}
2124		2500
…		…
2139	clear_pending (EV_A_ (W)w);	2515	clear_pending (EV_A_ (W)w);
2140	if (expect_false (!ev_is_active (w)))	2516	if (expect_false (!ev_is_active (w)))
2141	return;	2517	return;
2142		2518
2143	{	2519	{
2144	int active = ((W)w)->active;	2520	int active = ev_active (w);
		2521
2145	checks [active - 1] = checks [--checkcnt];	2522	checks [active - 1] = checks [--checkcnt];
2146	((W)checks [active - 1])->active = active;	2523	ev_active (checks [active - 1]) = active;
2147	}	2524	}
2148		2525
2149	ev_stop (EV_A_ (W)w);	2526	ev_stop (EV_A_ (W)w);
2150	}	2527	}
2151		2528
2152	#if EV_EMBED_ENABLE	2529	#if EV_EMBED_ENABLE
2153	void noinline	2530	void noinline
2154	ev_embed_sweep (EV_P_ ev_embed *w)	2531	ev_embed_sweep (EV_P_ ev_embed *w)
2155	{	2532	{
2156	ev_loop (w->loop, EVLOOP_NONBLOCK);	2533	ev_loop (w->other, EVLOOP_NONBLOCK);
2157	}	2534	}
2158		2535
2159	static void	2536	static void
2160	embed_cb (EV_P_ ev_io *io, int revents)	2537	embed_io_cb (EV_P_ ev_io *io, int revents)
2161	{	2538	{
2162	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	2539	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2163		2540
2164	if (ev_cb (w))	2541	if (ev_cb (w))
2165	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2542	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2166	else	2543	else
2167	ev_embed_sweep (loop, w);	2544	ev_loop (w->other, EVLOOP_NONBLOCK);
2168	}	2545	}
		2546
		2547	static void
		2548	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2549	{
		2550	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2551
		2552	{
		2553	struct ev_loop *loop = w->other;
		2554
		2555	while (fdchangecnt)
		2556	{
		2557	fd_reify (EV_A);
		2558	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2559	}
		2560	}
		2561	}
		2562
		2563	#if 0
		2564	static void
		2565	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2566	{
		2567	ev_idle_stop (EV_A_ idle);
		2568	}
		2569	#endif
2169		2570
2170	void	2571	void
2171	ev_embed_start (EV_P_ ev_embed *w)	2572	ev_embed_start (EV_P_ ev_embed *w)
2172	{	2573	{
2173	if (expect_false (ev_is_active (w)))	2574	if (expect_false (ev_is_active (w)))
2174	return;	2575	return;
2175		2576
2176	{	2577	{
2177	struct ev_loop *loop = w->loop;	2578	struct ev_loop *loop = w->other;
2178	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2579	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2179	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2580	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2180	}	2581	}
2181		2582
2182	ev_set_priority (&w->io, ev_priority (w));	2583	ev_set_priority (&w->io, ev_priority (w));
2183	ev_io_start (EV_A_ &w->io);	2584	ev_io_start (EV_A_ &w->io);
		2585
		2586	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2587	ev_set_priority (&w->prepare, EV_MINPRI);
		2588	ev_prepare_start (EV_A_ &w->prepare);
		2589
		2590	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2184		2591
2185	ev_start (EV_A_ (W)w, 1);	2592	ev_start (EV_A_ (W)w, 1);
2186	}	2593	}
2187		2594
2188	void	2595	void
…		…
2191	clear_pending (EV_A_ (W)w);	2598	clear_pending (EV_A_ (W)w);
2192	if (expect_false (!ev_is_active (w)))	2599	if (expect_false (!ev_is_active (w)))
2193	return;	2600	return;
2194		2601
2195	ev_io_stop (EV_A_ &w->io);	2602	ev_io_stop (EV_A_ &w->io);
		2603	ev_prepare_stop (EV_A_ &w->prepare);
2196		2604
2197	ev_stop (EV_A_ (W)w);	2605	ev_stop (EV_A_ (W)w);
2198	}	2606	}
2199	#endif	2607	#endif
2200		2608
…		…
2216	clear_pending (EV_A_ (W)w);	2624	clear_pending (EV_A_ (W)w);
2217	if (expect_false (!ev_is_active (w)))	2625	if (expect_false (!ev_is_active (w)))
2218	return;	2626	return;
2219		2627
2220	{	2628	{
2221	int active = ((W)w)->active;	2629	int active = ev_active (w);
		2630
2222	forks [active - 1] = forks [--forkcnt];	2631	forks [active - 1] = forks [--forkcnt];
2223	((W)forks [active - 1])->active = active;	2632	ev_active (forks [active - 1]) = active;
2224	}	2633	}
2225		2634
2226	ev_stop (EV_A_ (W)w);	2635	ev_stop (EV_A_ (W)w);
		2636	}
		2637	#endif
		2638
		2639	#if EV_ASYNC_ENABLE
		2640	void
		2641	ev_async_start (EV_P_ ev_async *w)
		2642	{
		2643	if (expect_false (ev_is_active (w)))
		2644	return;
		2645
		2646	evpipe_init (EV_A);
		2647
		2648	ev_start (EV_A_ (W)w, ++asynccnt);
		2649	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2650	asyncs [asynccnt - 1] = w;
		2651	}
		2652
		2653	void
		2654	ev_async_stop (EV_P_ ev_async *w)
		2655	{
		2656	clear_pending (EV_A_ (W)w);
		2657	if (expect_false (!ev_is_active (w)))
		2658	return;
		2659
		2660	{
		2661	int active = ev_active (w);
		2662
		2663	asyncs [active - 1] = asyncs [--asynccnt];
		2664	ev_active (asyncs [active - 1]) = active;
		2665	}
		2666
		2667	ev_stop (EV_A_ (W)w);
		2668	}
		2669
		2670	void
		2671	ev_async_send (EV_P_ ev_async *w)
		2672	{
		2673	w->sent = 1;
		2674	evpipe_write (EV_A_ &gotasync);
2227	}	2675	}
2228	#endif	2676	#endif
2229		2677
2230	/*****************************************************************************/	2678	/*****************************************************************************/
2231		2679
…		…
2289	ev_timer_set (&once->to, timeout, 0.);	2737	ev_timer_set (&once->to, timeout, 0.);
2290	ev_timer_start (EV_A_ &once->to);	2738	ev_timer_start (EV_A_ &once->to);
2291	}	2739	}
2292	}	2740	}
2293		2741
		2742	#if EV_MULTIPLICITY
		2743	#include "ev_wrap.h"
		2744	#endif
		2745
2294	#ifdef __cplusplus	2746	#ifdef __cplusplus
2295	}	2747	}
2296	#endif	2748	#endif
2297		2749

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