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Comparing libev/ev.c (file contents):
Revision 1.176 by root, Tue Dec 11 04:31:55 2007 UTC vs.
Revision 1.236 by root, Wed May 7 14:46:22 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	/**/
220		284
221	/*	285	/*
222	* This is used to avoid floating point rounding problems.	286	* This is used to avoid floating point rounding problems.
223	* It is added to ev_rt_now when scheduling periodics	287	* It is added to ev_rt_now when scheduling periodics
224	* to ensure progress, time-wise, even when rounding	288	* to ensure progress, time-wise, even when rounding
225	* errors are against us.	289	* errors are against us.
226	* This value is good at least till the year 4000	290	* This value is good at least till the year 4000.
227	* and intervals up to 20 years.
228	* Better solutions welcome.	291	* Better solutions welcome.
229	*/	292	*/
230	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
231		294
232	#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) */
233	#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) */
234	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
235		298
236	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
237	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
238	# define noinline __attribute__ ((noinline))	301	# define noinline __attribute__ ((noinline))
239	#else	302	#else
240	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
241	# define noinline	304	# define noinline
242	# if __STDC_VERSION__ < 199901L	305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
243	# define inline	306	# define inline
244	# endif	307	# endif
245	#endif	308	#endif
246		309
247	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
262		325
263	typedef ev_watcher *W;	326	typedef ev_watcher *W;
264	typedef ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
265	typedef ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
266		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 */
267	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
268		338
269	#ifdef _WIN32	339	#ifdef _WIN32
270	# include "ev_win32.c"	340	# include "ev_win32.c"
271	#endif	341	#endif
272		342
…		…
293	perror (msg);	363	perror (msg);
294	abort ();	364	abort ();
295	}	365	}
296	}	366	}
297		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
298	static void *(*alloc)(void *ptr, long size);	383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
299		384
300	void	385	void
301	ev_set_allocator (void *(*cb)(void *ptr, long size))	386	ev_set_allocator (void *(*cb)(void *ptr, long size))
302	{	387	{
303	alloc = cb;	388	alloc = cb;
304	}	389	}
305		390
306	inline_speed void *	391	inline_speed void *
307	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
308	{	393	{
309	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
310		395
311	if (!ptr && size)	396	if (!ptr && size)
312	{	397	{
313	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
314	abort ();	399	abort ();
…		…
408	{	493	{
409	return ev_rt_now;	494	return ev_rt_now;
410	}	495	}
411	#endif	496	#endif
412		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
413	int inline_size	527	int inline_size
414	array_nextsize (int elem, int cur, int cnt)	528	array_nextsize (int elem, int cur, int cnt)
415	{	529	{
416	int ncur = cur + 1;	530	int ncur = cur + 1;
417		531
418	do	532	do
419	ncur <<= 1;	533	ncur <<= 1;
420	while (cnt > ncur);	534	while (cnt > ncur);
421		535
422	/* 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 */
423	if (elem * ncur > 4096)	537	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
424	{	538	{
425	ncur *= elem;	539	ncur *= elem;
426	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;	540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
427	ncur = ncur - sizeof (void *) * 4;	541	ncur = ncur - sizeof (void *) * 4;
428	ncur /= elem;	542	ncur /= elem;
429	}	543	}
430		544
431	return ncur;	545	return ncur;
…		…
477	pendings [pri][w_->pending - 1].w = w_;	591	pendings [pri][w_->pending - 1].w = w_;
478	pendings [pri][w_->pending - 1].events = revents;	592	pendings [pri][w_->pending - 1].events = revents;
479	}	593	}
480	}	594	}
481		595
482	void inline_size	596	void inline_speed
483	queue_events (EV_P_ W *events, int eventcnt, int type)	597	queue_events (EV_P_ W *events, int eventcnt, int type)
484	{	598	{
485	int i;	599	int i;
486		600
487	for (i = 0; i < eventcnt; ++i)	601	for (i = 0; i < eventcnt; ++i)
…		…
534	{	648	{
535	int fd = fdchanges [i];	649	int fd = fdchanges [i];
536	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
537	ev_io *w;	651	ev_io *w;
538		652
539	int events = 0;	653	unsigned char events = 0;
540		654
541	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)
542	events |= w->events;	656	events |= (unsigned char)w->events;
543		657
544	#if EV_SELECT_IS_WINSOCKET	658	#if EV_SELECT_IS_WINSOCKET
545	if (events)	659	if (events)
546	{	660	{
547	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
548	anfd->handle = _get_osfhandle (fd);	665	anfd->handle = _get_osfhandle (fd);
		666	#endif
549	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));
550	}	668	}
551	#endif	669	#endif
552		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
553	anfd->reify = 0;	675	anfd->reify = 0;
554
555	backend_modify (EV_A_ fd, anfd->events, events);
556	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	}
557	}	681	}
558		682
559	fdchangecnt = 0;	683	fdchangecnt = 0;
560	}	684	}
561		685
562	void inline_size	686	void inline_size
563	fd_change (EV_P_ int fd)	687	fd_change (EV_P_ int fd, int flags)
564	{	688	{
565	if (expect_false (anfds [fd].reify))	689	unsigned char reify = anfds [fd].reify;
566	return;
567
568	anfds [fd].reify = 1;	690	anfds [fd].reify |= flags;
569		691
		692	if (expect_true (!reify))
		693	{
570	++fdchangecnt;	694	++fdchangecnt;
571	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
572	fdchanges [fdchangecnt - 1] = fd;	696	fdchanges [fdchangecnt - 1] = fd;
		697	}
573	}	698	}
574		699
575	void inline_speed	700	void inline_speed
576	fd_kill (EV_P_ int fd)	701	fd_kill (EV_P_ int fd)
577	{	702	{
…		…
628		753
629	for (fd = 0; fd < anfdmax; ++fd)	754	for (fd = 0; fd < anfdmax; ++fd)
630	if (anfds [fd].events)	755	if (anfds [fd].events)
631	{	756	{
632	anfds [fd].events = 0;	757	anfds [fd].events = 0;
633	fd_change (EV_A_ fd);	758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
634	}	759	}
635	}	760	}
636		761
637	/*****************************************************************************/	762	/*****************************************************************************/
638		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	#if USE_4HEAP
		772
		773	#define HEAP0 3 /* index of first element in heap */
		774
		775	/* towards the root */
639	void inline_speed	776	void inline_speed
640	upheap (WT *heap, int k)	777	upheap (WT *heap, int k)
641	{	778	{
642	WT w = heap [k];	779	WT w = heap [k];
643		780
644	while (k && heap [k >> 1]->at > w->at)	781	for (;;)
645	{	782	{
		783	int p = ((k - HEAP0 - 1) / 4) + HEAP0;
		784
		785	if (p >= HEAP0 || heap [p]->at <= w->at)
		786	break;
		787
646	heap [k] = heap [k >> 1];	788	heap [k] = heap [p];
647	((W)heap [k])->active = k + 1;	789	ev_active (heap [k]) = k;
648	k >>= 1;	790	k = p;
649	}	791	}
650		792
651	heap [k] = w;	793	heap [k] = w;
652	((W)heap [k])->active = k + 1;	794	ev_active (heap [k]) = k;
653
654	}	795	}
655		796
		797	/* away from the root */
656	void inline_speed	798	void inline_speed
657	downheap (WT *heap, int N, int k)	799	downheap (WT *heap, int N, int k)
658	{	800	{
659	WT w = heap [k];	801	WT w = heap [k];
		802	WT *E = heap + N + HEAP0;
660		803
661	while (k < (N >> 1))	804	for (;;)
662	{	805	{
663	int j = k << 1;	806	ev_tstamp minat;
		807	WT *minpos;
		808	WT *pos = heap + 4 * (k - HEAP0) + HEAP0;
664		809
665	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	810	// find minimum child
		811	if (expect_true (pos +3 < E))
666	++j;	812	{
		813	/* fast path */
		814	(minpos = pos + 0), (minat = (*minpos)->at);
		815	if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		816	if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		817	if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		818	}
		819	else
		820	{
		821	/* slow path */
		822	if (pos >= E)
		823	break;
		824	(minpos = pos + 0), (minat = (*minpos)->at);
		825	if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		826	if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		827	if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		828	}
667		829
668	if (w->at <= heap [j]->at)	830	if (w->at <= minat)
669	break;	831	break;
670		832
671	heap [k] = heap [j];	833	ev_active (*minpos) = k;
672	((W)heap [k])->active = k + 1;	834	heap [k] = *minpos;
673	k = j;	835
		836	k = minpos - heap;
674	}	837	}
675		838
676	heap [k] = w;	839	heap [k] = w;
		840	ev_active (heap [k]) = k;
		841	}
		842
		843	#else // 4HEAP
		844
		845	#define HEAP0 1
		846
		847	/* towards the root */
		848	void inline_speed
		849	upheap (WT *heap, int k)
		850	{
		851	WT w = heap [k];
		852
		853	for (;;)
		854	{
		855	int p = k >> 1;
		856
		857	/* maybe we could use a dummy element at heap [0]? */
		858	if (!p || heap [p]->at <= w->at)
		859	break;
		860
		861	heap [k] = heap [p];
		862	ev_active (heap [k]) = k;
		863	k = p;
		864	}
		865
		866	heap [k] = w;
		867	ev_active (heap [k]) = k;
		868	}
		869
		870	/* away from the root */
		871	void inline_speed
		872	downheap (WT *heap, int N, int k)
		873	{
		874	WT w = heap [k];
		875
		876	for (;;)
		877	{
		878	int c = k << 1;
		879
		880	if (c > N)
		881	break;
		882
		883	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		884	? 1 : 0;
		885
		886	if (w->at <= heap [c]->at)
		887	break;
		888
		889	heap [k] = heap [c];
677	((W)heap [k])->active = k + 1;	890	((W)heap [k])->active = k;
		891
		892	k = c;
		893	}
		894
		895	heap [k] = w;
		896	ev_active (heap [k]) = k;
678	}	897	}
		898	#endif
679		899
680	void inline_size	900	void inline_size
681	adjustheap (WT *heap, int N, int k)	901	adjustheap (WT *heap, int N, int k)
682	{	902	{
683	upheap (heap, k);	903	upheap (heap, k);
…		…
687	/*****************************************************************************/	907	/*****************************************************************************/
688		908
689	typedef struct	909	typedef struct
690	{	910	{
691	WL head;	911	WL head;
692	sig_atomic_t volatile gotsig;	912	EV_ATOMIC_T gotsig;
693	} ANSIG;	913	} ANSIG;
694		914
695	static ANSIG *signals;	915	static ANSIG *signals;
696	static int signalmax;	916	static int signalmax;
697		917
698	static int sigpipe [2];	918	static EV_ATOMIC_T gotsig;
699	static sig_atomic_t volatile gotsig;
700	static ev_io sigev;
701		919
702	void inline_size	920	void inline_size
703	signals_init (ANSIG *base, int count)	921	signals_init (ANSIG *base, int count)
704	{	922	{
705	while (count--)	923	while (count--)
…		…
709		927
710	++base;	928	++base;
711	}	929	}
712	}	930	}
713		931
714	static void	932	/*****************************************************************************/
715	sighandler (int signum)
716	{
717	#if _WIN32
718	signal (signum, sighandler);
719	#endif
720
721	signals [signum - 1].gotsig = 1;
722
723	if (!gotsig)
724	{
725	int old_errno = errno;
726	gotsig = 1;
727	write (sigpipe [1], &signum, 1);
728	errno = old_errno;
729	}
730	}
731
732	void noinline
733	ev_feed_signal_event (EV_P_ int signum)
734	{
735	WL w;
736
737	#if EV_MULTIPLICITY
738	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
739	#endif
740
741	--signum;
742
743	if (signum < 0 || signum >= signalmax)
744	return;
745
746	signals [signum].gotsig = 0;
747
748	for (w = signals [signum].head; w; w = w->next)
749	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
750	}
751
752	static void
753	sigcb (EV_P_ ev_io *iow, int revents)
754	{
755	int signum;
756
757	read (sigpipe [0], &revents, 1);
758	gotsig = 0;
759
760	for (signum = signalmax; signum--; )
761	if (signals [signum].gotsig)
762	ev_feed_signal_event (EV_A_ signum + 1);
763	}
764		933
765	void inline_speed	934	void inline_speed
766	fd_intern (int fd)	935	fd_intern (int fd)
767	{	936	{
768	#ifdef _WIN32	937	#ifdef _WIN32
…		…
773	fcntl (fd, F_SETFL, O_NONBLOCK);	942	fcntl (fd, F_SETFL, O_NONBLOCK);
774	#endif	943	#endif
775	}	944	}
776		945
777	static void noinline	946	static void noinline
778	siginit (EV_P)	947	evpipe_init (EV_P)
779	{	948	{
		949	if (!ev_is_active (&pipeev))
		950	{
		951	#if EV_USE_EVENTFD
		952	if ((evfd = eventfd (0, 0)) >= 0)
		953	{
		954	evpipe [0] = -1;
		955	fd_intern (evfd);
		956	ev_io_set (&pipeev, evfd, EV_READ);
		957	}
		958	else
		959	#endif
		960	{
		961	while (pipe (evpipe))
		962	syserr ("(libev) error creating signal/async pipe");
		963
780	fd_intern (sigpipe [0]);	964	fd_intern (evpipe [0]);
781	fd_intern (sigpipe [1]);	965	fd_intern (evpipe [1]);
		966	ev_io_set (&pipeev, evpipe [0], EV_READ);
		967	}
782		968
783	ev_io_set (&sigev, sigpipe [0], EV_READ);
784	ev_io_start (EV_A_ &sigev);	969	ev_io_start (EV_A_ &pipeev);
785	ev_unref (EV_A); /* child watcher should not keep loop alive */	970	ev_unref (EV_A); /* watcher should not keep loop alive */
		971	}
		972	}
		973
		974	void inline_size
		975	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		976	{
		977	if (!*flag)
		978	{
		979	int old_errno = errno; /* save errno because write might clobber it */
		980
		981	*flag = 1;
		982
		983	#if EV_USE_EVENTFD
		984	if (evfd >= 0)
		985	{
		986	uint64_t counter = 1;
		987	write (evfd, &counter, sizeof (uint64_t));
		988	}
		989	else
		990	#endif
		991	write (evpipe [1], &old_errno, 1);
		992
		993	errno = old_errno;
		994	}
		995	}
		996
		997	static void
		998	pipecb (EV_P_ ev_io *iow, int revents)
		999	{
		1000	#if EV_USE_EVENTFD
		1001	if (evfd >= 0)
		1002	{
		1003	uint64_t counter;
		1004	read (evfd, &counter, sizeof (uint64_t));
		1005	}
		1006	else
		1007	#endif
		1008	{
		1009	char dummy;
		1010	read (evpipe [0], &dummy, 1);
		1011	}
		1012
		1013	if (gotsig && ev_is_default_loop (EV_A))
		1014	{
		1015	int signum;
		1016	gotsig = 0;
		1017
		1018	for (signum = signalmax; signum--; )
		1019	if (signals [signum].gotsig)
		1020	ev_feed_signal_event (EV_A_ signum + 1);
		1021	}
		1022
		1023	#if EV_ASYNC_ENABLE
		1024	if (gotasync)
		1025	{
		1026	int i;
		1027	gotasync = 0;
		1028
		1029	for (i = asynccnt; i--; )
		1030	if (asyncs [i]->sent)
		1031	{
		1032	asyncs [i]->sent = 0;
		1033	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1034	}
		1035	}
		1036	#endif
786	}	1037	}
787		1038
788	/*****************************************************************************/	1039	/*****************************************************************************/
789		1040
		1041	static void
		1042	ev_sighandler (int signum)
		1043	{
		1044	#if EV_MULTIPLICITY
		1045	struct ev_loop *loop = &default_loop_struct;
		1046	#endif
		1047
		1048	#if _WIN32
		1049	signal (signum, ev_sighandler);
		1050	#endif
		1051
		1052	signals [signum - 1].gotsig = 1;
		1053	evpipe_write (EV_A_ &gotsig);
		1054	}
		1055
		1056	void noinline
		1057	ev_feed_signal_event (EV_P_ int signum)
		1058	{
		1059	WL w;
		1060
		1061	#if EV_MULTIPLICITY
		1062	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1063	#endif
		1064
		1065	--signum;
		1066
		1067	if (signum < 0 || signum >= signalmax)
		1068	return;
		1069
		1070	signals [signum].gotsig = 0;
		1071
		1072	for (w = signals [signum].head; w; w = w->next)
		1073	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1074	}
		1075
		1076	/*****************************************************************************/
		1077
790	static ev_child *childs [EV_PID_HASHSIZE];	1078	static WL childs [EV_PID_HASHSIZE];
791		1079
792	#ifndef _WIN32	1080	#ifndef _WIN32
793		1081
794	static ev_signal childev;	1082	static ev_signal childev;
795		1083
		1084	#ifndef WIFCONTINUED
		1085	# define WIFCONTINUED(status) 0
		1086	#endif
		1087
796	void inline_speed	1088	void inline_speed
797	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1089	child_reap (EV_P_ int chain, int pid, int status)
798	{	1090	{
799	ev_child *w;	1091	ev_child *w;
		1092	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
800		1093
801	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1094	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1095	{
802	if (w->pid == pid || !w->pid)	1096	if ((w->pid == pid || !w->pid)
		1097	&& (!traced || (w->flags & 1)))
803	{	1098	{
804	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */	1099	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
805	w->rpid = pid;	1100	w->rpid = pid;
806	w->rstatus = status;	1101	w->rstatus = status;
807	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1102	ev_feed_event (EV_A_ (W)w, EV_CHILD);
808	}	1103	}
		1104	}
809	}	1105	}
810		1106
811	#ifndef WCONTINUED	1107	#ifndef WCONTINUED
812	# define WCONTINUED 0	1108	# define WCONTINUED 0
813	#endif	1109	#endif
…		…
822	if (!WCONTINUED	1118	if (!WCONTINUED
823	|| errno != EINVAL	1119	|| errno != EINVAL
824	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))	1120	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
825	return;	1121	return;
826		1122
827	/* make sure we are called again until all childs have been reaped */	1123	/* make sure we are called again until all children have been reaped */
828	/* we need to do it this way so that the callback gets called before we continue */	1124	/* we need to do it this way so that the callback gets called before we continue */
829	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1125	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
830		1126
831	child_reap (EV_A_ sw, pid, pid, status);	1127	child_reap (EV_A_ pid, pid, status);
832	if (EV_PID_HASHSIZE > 1)	1128	if (EV_PID_HASHSIZE > 1)
833	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1129	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
834	}	1130	}
835		1131
836	#endif	1132	#endif
837		1133
838	/*****************************************************************************/	1134	/*****************************************************************************/
…		…
910	}	1206	}
911		1207
912	unsigned int	1208	unsigned int
913	ev_embeddable_backends (void)	1209	ev_embeddable_backends (void)
914	{	1210	{
915	return EVBACKEND_EPOLL	1211	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
916	| EVBACKEND_KQUEUE	1212
917	| EVBACKEND_PORT;	1213	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1214	/* please fix it and tell me how to detect the fix */
		1215	flags &= ~EVBACKEND_EPOLL;
		1216
		1217	return flags;
918	}	1218	}
919		1219
920	unsigned int	1220	unsigned int
921	ev_backend (EV_P)	1221	ev_backend (EV_P)
922	{	1222	{
…		…
925		1225
926	unsigned int	1226	unsigned int
927	ev_loop_count (EV_P)	1227	ev_loop_count (EV_P)
928	{	1228	{
929	return loop_count;	1229	return loop_count;
		1230	}
		1231
		1232	void
		1233	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1234	{
		1235	io_blocktime = interval;
		1236	}
		1237
		1238	void
		1239	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1240	{
		1241	timeout_blocktime = interval;
930	}	1242	}
931		1243
932	static void noinline	1244	static void noinline
933	loop_init (EV_P_ unsigned int flags)	1245	loop_init (EV_P_ unsigned int flags)
934	{	1246	{
…		…
940	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1252	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
941	have_monotonic = 1;	1253	have_monotonic = 1;
942	}	1254	}
943	#endif	1255	#endif
944		1256
945	ev_rt_now = ev_time ();	1257	ev_rt_now = ev_time ();
946	mn_now = get_clock ();	1258	mn_now = get_clock ();
947	now_floor = mn_now;	1259	now_floor = mn_now;
948	rtmn_diff = ev_rt_now - mn_now;	1260	rtmn_diff = ev_rt_now - mn_now;
		1261
		1262	io_blocktime = 0.;
		1263	timeout_blocktime = 0.;
		1264	backend = 0;
		1265	backend_fd = -1;
		1266	gotasync = 0;
		1267	#if EV_USE_INOTIFY
		1268	fs_fd = -2;
		1269	#endif
949		1270
950	/* pid check not overridable via env */	1271	/* pid check not overridable via env */
951	#ifndef _WIN32	1272	#ifndef _WIN32
952	if (flags & EVFLAG_FORKCHECK)	1273	if (flags & EVFLAG_FORKCHECK)
953	curpid = getpid ();	1274	curpid = getpid ();
…		…
956	if (!(flags & EVFLAG_NOENV)	1277	if (!(flags & EVFLAG_NOENV)
957	&& !enable_secure ()	1278	&& !enable_secure ()
958	&& getenv ("LIBEV_FLAGS"))	1279	&& getenv ("LIBEV_FLAGS"))
959	flags = atoi (getenv ("LIBEV_FLAGS"));	1280	flags = atoi (getenv ("LIBEV_FLAGS"));
960		1281
961	if (!(flags & 0x0000ffffUL))	1282	if (!(flags & 0x0000ffffU))
962	flags |= ev_recommended_backends ();	1283	flags |= ev_recommended_backends ();
963
964	backend = 0;
965	backend_fd = -1;
966	#if EV_USE_INOTIFY
967	fs_fd = -2;
968	#endif
969		1284
970	#if EV_USE_PORT	1285	#if EV_USE_PORT
971	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1286	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
972	#endif	1287	#endif
973	#if EV_USE_KQUEUE	1288	#if EV_USE_KQUEUE
…		…
981	#endif	1296	#endif
982	#if EV_USE_SELECT	1297	#if EV_USE_SELECT
983	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1298	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
984	#endif	1299	#endif
985		1300
986	ev_init (&sigev, sigcb);	1301	ev_init (&pipeev, pipecb);
987	ev_set_priority (&sigev, EV_MAXPRI);	1302	ev_set_priority (&pipeev, EV_MAXPRI);
988	}	1303	}
989	}	1304	}
990		1305
991	static void noinline	1306	static void noinline
992	loop_destroy (EV_P)	1307	loop_destroy (EV_P)
993	{	1308	{
994	int i;	1309	int i;
		1310
		1311	if (ev_is_active (&pipeev))
		1312	{
		1313	ev_ref (EV_A); /* signal watcher */
		1314	ev_io_stop (EV_A_ &pipeev);
		1315
		1316	#if EV_USE_EVENTFD
		1317	if (evfd >= 0)
		1318	close (evfd);
		1319	#endif
		1320
		1321	if (evpipe [0] >= 0)
		1322	{
		1323	close (evpipe [0]);
		1324	close (evpipe [1]);
		1325	}
		1326	}
995		1327
996	#if EV_USE_INOTIFY	1328	#if EV_USE_INOTIFY
997	if (fs_fd >= 0)	1329	if (fs_fd >= 0)
998	close (fs_fd);	1330	close (fs_fd);
999	#endif	1331	#endif
…		…
1022	array_free (pending, [i]);	1354	array_free (pending, [i]);
1023	#if EV_IDLE_ENABLE	1355	#if EV_IDLE_ENABLE
1024	array_free (idle, [i]);	1356	array_free (idle, [i]);
1025	#endif	1357	#endif
1026	}	1358	}
		1359
		1360	ev_free (anfds); anfdmax = 0;
1027		1361
1028	/* have to use the microsoft-never-gets-it-right macro */	1362	/* have to use the microsoft-never-gets-it-right macro */
1029	array_free (fdchange, EMPTY);	1363	array_free (fdchange, EMPTY);
1030	array_free (timer, EMPTY);	1364	array_free (timer, EMPTY);
1031	#if EV_PERIODIC_ENABLE	1365	#if EV_PERIODIC_ENABLE
1032	array_free (periodic, EMPTY);	1366	array_free (periodic, EMPTY);
1033	#endif	1367	#endif
		1368	#if EV_FORK_ENABLE
		1369	array_free (fork, EMPTY);
		1370	#endif
1034	array_free (prepare, EMPTY);	1371	array_free (prepare, EMPTY);
1035	array_free (check, EMPTY);	1372	array_free (check, EMPTY);
		1373	#if EV_ASYNC_ENABLE
		1374	array_free (async, EMPTY);
		1375	#endif
1036		1376
1037	backend = 0;	1377	backend = 0;
1038	}	1378	}
1039		1379
		1380	#if EV_USE_INOTIFY
1040	void inline_size infy_fork (EV_P);	1381	void inline_size infy_fork (EV_P);
		1382	#endif
1041		1383
1042	void inline_size	1384	void inline_size
1043	loop_fork (EV_P)	1385	loop_fork (EV_P)
1044	{	1386	{
1045	#if EV_USE_PORT	1387	#if EV_USE_PORT
…		…
1053	#endif	1395	#endif
1054	#if EV_USE_INOTIFY	1396	#if EV_USE_INOTIFY
1055	infy_fork (EV_A);	1397	infy_fork (EV_A);
1056	#endif	1398	#endif
1057		1399
1058	if (ev_is_active (&sigev))	1400	if (ev_is_active (&pipeev))
1059	{	1401	{
1060	/* default loop */	1402	/* this "locks" the handlers against writing to the pipe */
		1403	/* while we modify the fd vars */
		1404	gotsig = 1;
		1405	#if EV_ASYNC_ENABLE
		1406	gotasync = 1;
		1407	#endif
1061		1408
1062	ev_ref (EV_A);	1409	ev_ref (EV_A);
1063	ev_io_stop (EV_A_ &sigev);	1410	ev_io_stop (EV_A_ &pipeev);
		1411
		1412	#if EV_USE_EVENTFD
		1413	if (evfd >= 0)
		1414	close (evfd);
		1415	#endif
		1416
		1417	if (evpipe [0] >= 0)
		1418	{
1064	close (sigpipe [0]);	1419	close (evpipe [0]);
1065	close (sigpipe [1]);	1420	close (evpipe [1]);
		1421	}
1066		1422
1067	while (pipe (sigpipe))
1068	syserr ("(libev) error creating pipe");
1069
1070	siginit (EV_A);	1423	evpipe_init (EV_A);
		1424	/* now iterate over everything, in case we missed something */
		1425	pipecb (EV_A_ &pipeev, EV_READ);
1071	}	1426	}
1072		1427
1073	postfork = 0;	1428	postfork = 0;
1074	}	1429	}
1075		1430
…		…
1097	}	1452	}
1098		1453
1099	void	1454	void
1100	ev_loop_fork (EV_P)	1455	ev_loop_fork (EV_P)
1101	{	1456	{
1102	postfork = 1;	1457	postfork = 1; /* must be in line with ev_default_fork */
1103	}	1458	}
1104
1105	#endif	1459	#endif
1106		1460
1107	#if EV_MULTIPLICITY	1461	#if EV_MULTIPLICITY
1108	struct ev_loop *	1462	struct ev_loop *
1109	ev_default_loop_init (unsigned int flags)	1463	ev_default_loop_init (unsigned int flags)
1110	#else	1464	#else
1111	int	1465	int
1112	ev_default_loop (unsigned int flags)	1466	ev_default_loop (unsigned int flags)
1113	#endif	1467	#endif
1114	{	1468	{
1115	if (sigpipe [0] == sigpipe [1])
1116	if (pipe (sigpipe))
1117	return 0;
1118
1119	if (!ev_default_loop_ptr)	1469	if (!ev_default_loop_ptr)
1120	{	1470	{
1121	#if EV_MULTIPLICITY	1471	#if EV_MULTIPLICITY
1122	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1472	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1123	#else	1473	#else
…		…
1126		1476
1127	loop_init (EV_A_ flags);	1477	loop_init (EV_A_ flags);
1128		1478
1129	if (ev_backend (EV_A))	1479	if (ev_backend (EV_A))
1130	{	1480	{
1131	siginit (EV_A);
1132
1133	#ifndef _WIN32	1481	#ifndef _WIN32
1134	ev_signal_init (&childev, childcb, SIGCHLD);	1482	ev_signal_init (&childev, childcb, SIGCHLD);
1135	ev_set_priority (&childev, EV_MAXPRI);	1483	ev_set_priority (&childev, EV_MAXPRI);
1136	ev_signal_start (EV_A_ &childev);	1484	ev_signal_start (EV_A_ &childev);
1137	ev_unref (EV_A); /* child watcher should not keep loop alive */	1485	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1154	#ifndef _WIN32	1502	#ifndef _WIN32
1155	ev_ref (EV_A); /* child watcher */	1503	ev_ref (EV_A); /* child watcher */
1156	ev_signal_stop (EV_A_ &childev);	1504	ev_signal_stop (EV_A_ &childev);
1157	#endif	1505	#endif
1158		1506
1159	ev_ref (EV_A); /* signal watcher */
1160	ev_io_stop (EV_A_ &sigev);
1161
1162	close (sigpipe [0]); sigpipe [0] = 0;
1163	close (sigpipe [1]); sigpipe [1] = 0;
1164
1165	loop_destroy (EV_A);	1507	loop_destroy (EV_A);
1166	}	1508	}
1167		1509
1168	void	1510	void
1169	ev_default_fork (void)	1511	ev_default_fork (void)
…		…
1171	#if EV_MULTIPLICITY	1513	#if EV_MULTIPLICITY
1172	struct ev_loop *loop = ev_default_loop_ptr;	1514	struct ev_loop *loop = ev_default_loop_ptr;
1173	#endif	1515	#endif
1174		1516
1175	if (backend)	1517	if (backend)
1176	postfork = 1;	1518	postfork = 1; /* must be in line with ev_loop_fork */
1177	}	1519	}
1178		1520
1179	/*****************************************************************************/	1521	/*****************************************************************************/
1180		1522
1181	void	1523	void
…		…
1201	p->w->pending = 0;	1543	p->w->pending = 0;
1202	EV_CB_INVOKE (p->w, p->events);	1544	EV_CB_INVOKE (p->w, p->events);
1203	}	1545	}
1204	}	1546	}
1205	}	1547	}
1206
1207	void inline_size
1208	timers_reify (EV_P)
1209	{
1210	while (timercnt && ((WT)timers [0])->at <= mn_now)
1211	{
1212	ev_timer *w = timers [0];
1213
1214	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1215
1216	/* first reschedule or stop timer */
1217	if (w->repeat)
1218	{
1219	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1220
1221	((WT)w)->at += w->repeat;
1222	if (((WT)w)->at < mn_now)
1223	((WT)w)->at = mn_now;
1224
1225	downheap ((WT *)timers, timercnt, 0);
1226	}
1227	else
1228	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1229
1230	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1231	}
1232	}
1233
1234	#if EV_PERIODIC_ENABLE
1235	void inline_size
1236	periodics_reify (EV_P)
1237	{
1238	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1239	{
1240	ev_periodic *w = periodics [0];
1241
1242	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1243
1244	/* first reschedule or stop timer */
1245	if (w->reschedule_cb)
1246	{
1247	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1248	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1249	downheap ((WT *)periodics, periodiccnt, 0);
1250	}
1251	else if (w->interval)
1252	{
1253	((WT)w)->at = w->offset + floor ((ev_rt_now + TIME_EPSILON - w->offset) / w->interval + 1.) * w->interval;
1254	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1255	downheap ((WT *)periodics, periodiccnt, 0);
1256	}
1257	else
1258	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1259
1260	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1261	}
1262	}
1263
1264	static void noinline
1265	periodics_reschedule (EV_P)
1266	{
1267	int i;
1268
1269	/* adjust periodics after time jump */
1270	for (i = 0; i < periodiccnt; ++i)
1271	{
1272	ev_periodic *w = periodics [i];
1273
1274	if (w->reschedule_cb)
1275	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1276	else if (w->interval)
1277	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1278	}
1279
1280	/* now rebuild the heap */
1281	for (i = periodiccnt >> 1; i--; )
1282	downheap ((WT *)periodics, periodiccnt, i);
1283	}
1284	#endif
1285		1548
1286	#if EV_IDLE_ENABLE	1549	#if EV_IDLE_ENABLE
1287	void inline_size	1550	void inline_size
1288	idle_reify (EV_P)	1551	idle_reify (EV_P)
1289	{	1552	{
…		…
1304	}	1567	}
1305	}	1568	}
1306	}	1569	}
1307	#endif	1570	#endif
1308		1571
1309	int inline_size	1572	void inline_size
1310	time_update_monotonic (EV_P)	1573	timers_reify (EV_P)
1311	{	1574	{
		1575	while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
		1576	{
		1577	ev_timer *w = (ev_timer *)timers [HEAP0];
		1578
		1579	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1580
		1581	/* first reschedule or stop timer */
		1582	if (w->repeat)
		1583	{
		1584	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1585
		1586	ev_at (w) += w->repeat;
		1587	if (ev_at (w) < mn_now)
		1588	ev_at (w) = mn_now;
		1589
		1590	downheap (timers, timercnt, HEAP0);
		1591	}
		1592	else
		1593	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1594
		1595	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1596	}
		1597	}
		1598
		1599	#if EV_PERIODIC_ENABLE
		1600	void inline_size
		1601	periodics_reify (EV_P)
		1602	{
		1603	while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
		1604	{
		1605	ev_periodic *w = (ev_periodic *)periodics [HEAP0];
		1606
		1607	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1608
		1609	/* first reschedule or stop timer */
		1610	if (w->reschedule_cb)
		1611	{
		1612	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1613	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1614	downheap (periodics, periodiccnt, 1);
		1615	}
		1616	else if (w->interval)
		1617	{
		1618	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1619	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1620	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1621	downheap (periodics, periodiccnt, HEAP0);
		1622	}
		1623	else
		1624	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1625
		1626	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1627	}
		1628	}
		1629
		1630	static void noinline
		1631	periodics_reschedule (EV_P)
		1632	{
		1633	int i;
		1634
		1635	/* adjust periodics after time jump */
		1636	for (i = 1; i <= periodiccnt; ++i)
		1637	{
		1638	ev_periodic *w = (ev_periodic *)periodics [i];
		1639
		1640	if (w->reschedule_cb)
		1641	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1642	else if (w->interval)
		1643	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1644	}
		1645
		1646	/* now rebuild the heap */
		1647	for (i = periodiccnt >> 1; --i; )
		1648	downheap (periodics, periodiccnt, i + HEAP0);
		1649	}
		1650	#endif
		1651
		1652	void inline_speed
		1653	time_update (EV_P_ ev_tstamp max_block)
		1654	{
		1655	int i;
		1656
		1657	#if EV_USE_MONOTONIC
		1658	if (expect_true (have_monotonic))
		1659	{
		1660	ev_tstamp odiff = rtmn_diff;
		1661
1312	mn_now = get_clock ();	1662	mn_now = get_clock ();
1313		1663
		1664	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1665	/* interpolate in the meantime */
1314	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1666	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1315	{	1667	{
1316	ev_rt_now = rtmn_diff + mn_now;	1668	ev_rt_now = rtmn_diff + mn_now;
1317	return 0;	1669	return;
1318	}	1670	}
1319	else	1671
1320	{
1321	now_floor = mn_now;	1672	now_floor = mn_now;
1322	ev_rt_now = ev_time ();	1673	ev_rt_now = ev_time ();
1323	return 1;
1324	}
1325	}
1326		1674
1327	void inline_size	1675	/* loop a few times, before making important decisions.
1328	time_update (EV_P)	1676	* on the choice of "4": one iteration isn't enough,
1329	{	1677	* in case we get preempted during the calls to
1330	int i;	1678	* ev_time and get_clock. a second call is almost guaranteed
1331		1679	* to succeed in that case, though. and looping a few more times
1332	#if EV_USE_MONOTONIC	1680	* doesn't hurt either as we only do this on time-jumps or
1333	if (expect_true (have_monotonic))	1681	* in the unlikely event of having been preempted here.
1334	{	1682	*/
1335	if (time_update_monotonic (EV_A))	1683	for (i = 4; --i; )
1336	{	1684	{
1337	ev_tstamp odiff = rtmn_diff;
1338
1339	/* loop a few times, before making important decisions.
1340	* on the choice of "4": one iteration isn't enough,
1341	* in case we get preempted during the calls to
1342	* ev_time and get_clock. a second call is almost guaranteed
1343	* to succeed in that case, though. and looping a few more times
1344	* doesn't hurt either as we only do this on time-jumps or
1345	* in the unlikely event of having been preempted here.
1346	*/
1347	for (i = 4; --i; )
1348	{
1349	rtmn_diff = ev_rt_now - mn_now;	1685	rtmn_diff = ev_rt_now - mn_now;
1350		1686
1351	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1687	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1352	return; /* all is well */	1688	return; /* all is well */
1353		1689
1354	ev_rt_now = ev_time ();	1690	ev_rt_now = ev_time ();
1355	mn_now = get_clock ();	1691	mn_now = get_clock ();
1356	now_floor = mn_now;	1692	now_floor = mn_now;
1357	}	1693	}
1358		1694
1359	# if EV_PERIODIC_ENABLE	1695	# if EV_PERIODIC_ENABLE
1360	periodics_reschedule (EV_A);	1696	periodics_reschedule (EV_A);
1361	# endif	1697	# endif
1362	/* no timer adjustment, as the monotonic clock doesn't jump */	1698	/* no timer adjustment, as the monotonic clock doesn't jump */
1363	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1699	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1364	}
1365	}	1700	}
1366	else	1701	else
1367	#endif	1702	#endif
1368	{	1703	{
1369	ev_rt_now = ev_time ();	1704	ev_rt_now = ev_time ();
1370		1705
1371	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1706	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1372	{	1707	{
1373	#if EV_PERIODIC_ENABLE	1708	#if EV_PERIODIC_ENABLE
1374	periodics_reschedule (EV_A);	1709	periodics_reschedule (EV_A);
1375	#endif	1710	#endif
1376
1377	/* adjust timers. this is easy, as the offset is the same for all of them */	1711	/* adjust timers. this is easy, as the offset is the same for all of them */
1378	for (i = 0; i < timercnt; ++i)	1712	for (i = 1; i <= timercnt; ++i)
1379	((WT)timers [i])->at += ev_rt_now - mn_now;	1713	ev_at (timers [i]) += ev_rt_now - mn_now;
1380	}	1714	}
1381		1715
1382	mn_now = ev_rt_now;	1716	mn_now = ev_rt_now;
1383	}	1717	}
1384	}	1718	}
…		…
1398	static int loop_done;	1732	static int loop_done;
1399		1733
1400	void	1734	void
1401	ev_loop (EV_P_ int flags)	1735	ev_loop (EV_P_ int flags)
1402	{	1736	{
1403	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	1737	loop_done = EVUNLOOP_CANCEL;
1404	? EVUNLOOP_ONE
1405	: EVUNLOOP_CANCEL;
1406		1738
1407	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1739	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1408		1740
1409	do	1741	do
1410	{	1742	{
…		…
1444	/* update fd-related kernel structures */	1776	/* update fd-related kernel structures */
1445	fd_reify (EV_A);	1777	fd_reify (EV_A);
1446		1778
1447	/* calculate blocking time */	1779	/* calculate blocking time */
1448	{	1780	{
1449	ev_tstamp block;	1781	ev_tstamp waittime = 0.;
		1782	ev_tstamp sleeptime = 0.;
1450		1783
1451	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))	1784	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1452	block = 0.; /* do not block at all */
1453	else
1454	{	1785	{
1455	/* update time to cancel out callback processing overhead */	1786	/* update time to cancel out callback processing overhead */
1456	#if EV_USE_MONOTONIC
1457	if (expect_true (have_monotonic))
1458	time_update_monotonic (EV_A);	1787	time_update (EV_A_ 1e100);
1459	else
1460	#endif
1461	{
1462	ev_rt_now = ev_time ();
1463	mn_now = ev_rt_now;
1464	}
1465		1788
1466	block = MAX_BLOCKTIME;	1789	waittime = MAX_BLOCKTIME;
1467		1790
1468	if (timercnt)	1791	if (timercnt)
1469	{	1792	{
1470	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1793	ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
1471	if (block > to) block = to;	1794	if (waittime > to) waittime = to;
1472	}	1795	}
1473		1796
1474	#if EV_PERIODIC_ENABLE	1797	#if EV_PERIODIC_ENABLE
1475	if (periodiccnt)	1798	if (periodiccnt)
1476	{	1799	{
1477	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1800	ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1478	if (block > to) block = to;	1801	if (waittime > to) waittime = to;
1479	}	1802	}
1480	#endif	1803	#endif
1481		1804
1482	if (expect_false (block < 0.)) block = 0.;	1805	if (expect_false (waittime < timeout_blocktime))
		1806	waittime = timeout_blocktime;
		1807
		1808	sleeptime = waittime - backend_fudge;
		1809
		1810	if (expect_true (sleeptime > io_blocktime))
		1811	sleeptime = io_blocktime;
		1812
		1813	if (sleeptime)
		1814	{
		1815	ev_sleep (sleeptime);
		1816	waittime -= sleeptime;
		1817	}
1483	}	1818	}
1484		1819
1485	++loop_count;	1820	++loop_count;
1486	backend_poll (EV_A_ block);	1821	backend_poll (EV_A_ waittime);
		1822
		1823	/* update ev_rt_now, do magic */
		1824	time_update (EV_A_ waittime + sleeptime);
1487	}	1825	}
1488
1489	/* update ev_rt_now, do magic */
1490	time_update (EV_A);
1491		1826
1492	/* queue pending timers and reschedule them */	1827	/* queue pending timers and reschedule them */
1493	timers_reify (EV_A); /* relative timers called last */	1828	timers_reify (EV_A); /* relative timers called last */
1494	#if EV_PERIODIC_ENABLE	1829	#if EV_PERIODIC_ENABLE
1495	periodics_reify (EV_A); /* absolute timers called first */	1830	periodics_reify (EV_A); /* absolute timers called first */
…		…
1503	/* queue check watchers, to be executed first */	1838	/* queue check watchers, to be executed first */
1504	if (expect_false (checkcnt))	1839	if (expect_false (checkcnt))
1505	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1840	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1506		1841
1507	call_pending (EV_A);	1842	call_pending (EV_A);
1508
1509	}	1843	}
1510	while (expect_true (activecnt && !loop_done));	1844	while (expect_true (
		1845	activecnt
		1846	&& !loop_done
		1847	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1848	));
1511		1849
1512	if (loop_done == EVUNLOOP_ONE)	1850	if (loop_done == EVUNLOOP_ONE)
1513	loop_done = EVUNLOOP_CANCEL;	1851	loop_done = EVUNLOOP_CANCEL;
1514	}	1852	}
1515		1853
…		…
1606		1944
1607	assert (("ev_io_start called with negative fd", fd >= 0));	1945	assert (("ev_io_start called with negative fd", fd >= 0));
1608		1946
1609	ev_start (EV_A_ (W)w, 1);	1947	ev_start (EV_A_ (W)w, 1);
1610	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1948	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1611	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1949	wlist_add (&anfds[fd].head, (WL)w);
1612		1950
1613	fd_change (EV_A_ fd);	1951	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1952	w->events &= ~EV_IOFDSET;
1614	}	1953	}
1615		1954
1616	void noinline	1955	void noinline
1617	ev_io_stop (EV_P_ ev_io *w)	1956	ev_io_stop (EV_P_ ev_io *w)
1618	{	1957	{
…		…
1620	if (expect_false (!ev_is_active (w)))	1959	if (expect_false (!ev_is_active (w)))
1621	return;	1960	return;
1622		1961
1623	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1962	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1624		1963
1625	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1964	wlist_del (&anfds[w->fd].head, (WL)w);
1626	ev_stop (EV_A_ (W)w);	1965	ev_stop (EV_A_ (W)w);
1627		1966
1628	fd_change (EV_A_ w->fd);	1967	fd_change (EV_A_ w->fd, 1);
1629	}	1968	}
1630		1969
1631	void noinline	1970	void noinline
1632	ev_timer_start (EV_P_ ev_timer *w)	1971	ev_timer_start (EV_P_ ev_timer *w)
1633	{	1972	{
1634	if (expect_false (ev_is_active (w)))	1973	if (expect_false (ev_is_active (w)))
1635	return;	1974	return;
1636		1975
1637	((WT)w)->at += mn_now;	1976	ev_at (w) += mn_now;
1638		1977
1639	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1978	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1640		1979
1641	ev_start (EV_A_ (W)w, ++timercnt);	1980	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1642	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1981	array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
1643	timers [timercnt - 1] = w;	1982	timers [ev_active (w)] = (WT)w;
1644	upheap ((WT *)timers, timercnt - 1);	1983	upheap (timers, ev_active (w));
1645		1984
1646	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/	1985	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1647	}	1986	}
1648		1987
1649	void noinline	1988	void noinline
1650	ev_timer_stop (EV_P_ ev_timer *w)	1989	ev_timer_stop (EV_P_ ev_timer *w)
1651	{	1990	{
1652	clear_pending (EV_A_ (W)w);	1991	clear_pending (EV_A_ (W)w);
1653	if (expect_false (!ev_is_active (w)))	1992	if (expect_false (!ev_is_active (w)))
1654	return;	1993	return;
1655		1994
1656	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1657
1658	{	1995	{
1659	int active = ((W)w)->active;	1996	int active = ev_active (w);
1660		1997
		1998	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1999
1661	if (expect_true (--active < --timercnt))	2000	if (expect_true (active < timercnt + HEAP0 - 1))
1662	{	2001	{
1663	timers [active] = timers [timercnt];	2002	timers [active] = timers [timercnt + HEAP0 - 1];
1664	adjustheap ((WT *)timers, timercnt, active);	2003	adjustheap (timers, timercnt, active);
1665	}	2004	}
		2005
		2006	--timercnt;
1666	}	2007	}
1667		2008
1668	((WT)w)->at -= mn_now;	2009	ev_at (w) -= mn_now;
1669		2010
1670	ev_stop (EV_A_ (W)w);	2011	ev_stop (EV_A_ (W)w);
1671	}	2012	}
1672		2013
1673	void noinline	2014	void noinline
…		…
1675	{	2016	{
1676	if (ev_is_active (w))	2017	if (ev_is_active (w))
1677	{	2018	{
1678	if (w->repeat)	2019	if (w->repeat)
1679	{	2020	{
1680	((WT)w)->at = mn_now + w->repeat;	2021	ev_at (w) = mn_now + w->repeat;
1681	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2022	adjustheap (timers, timercnt, ev_active (w));
1682	}	2023	}
1683	else	2024	else
1684	ev_timer_stop (EV_A_ w);	2025	ev_timer_stop (EV_A_ w);
1685	}	2026	}
1686	else if (w->repeat)	2027	else if (w->repeat)
1687	{	2028	{
1688	w->at = w->repeat;	2029	ev_at (w) = w->repeat;
1689	ev_timer_start (EV_A_ w);	2030	ev_timer_start (EV_A_ w);
1690	}	2031	}
1691	}	2032	}
1692		2033
1693	#if EV_PERIODIC_ENABLE	2034	#if EV_PERIODIC_ENABLE
…		…
1696	{	2037	{
1697	if (expect_false (ev_is_active (w)))	2038	if (expect_false (ev_is_active (w)))
1698	return;	2039	return;
1699		2040
1700	if (w->reschedule_cb)	2041	if (w->reschedule_cb)
1701	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2042	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1702	else if (w->interval)	2043	else if (w->interval)
1703	{	2044	{
1704	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2045	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1705	/* this formula differs from the one in periodic_reify because we do not always round up */	2046	/* this formula differs from the one in periodic_reify because we do not always round up */
1706	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2047	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1707	}	2048	}
1708	else	2049	else
1709	((WT)w)->at = w->offset;	2050	ev_at (w) = w->offset;
1710		2051
1711	ev_start (EV_A_ (W)w, ++periodiccnt);	2052	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1712	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2053	array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
1713	periodics [periodiccnt - 1] = w;	2054	periodics [ev_active (w)] = (WT)w;
1714	upheap ((WT *)periodics, periodiccnt - 1);	2055	upheap (periodics, ev_active (w));
1715		2056
1716	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	2057	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1717	}	2058	}
1718		2059
1719	void noinline	2060	void noinline
1720	ev_periodic_stop (EV_P_ ev_periodic *w)	2061	ev_periodic_stop (EV_P_ ev_periodic *w)
1721	{	2062	{
1722	clear_pending (EV_A_ (W)w);	2063	clear_pending (EV_A_ (W)w);
1723	if (expect_false (!ev_is_active (w)))	2064	if (expect_false (!ev_is_active (w)))
1724	return;	2065	return;
1725		2066
1726	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1727
1728	{	2067	{
1729	int active = ((W)w)->active;	2068	int active = ev_active (w);
1730		2069
		2070	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		2071
1731	if (expect_true (--active < --periodiccnt))	2072	if (expect_true (active < periodiccnt + HEAP0 - 1))
1732	{	2073	{
1733	periodics [active] = periodics [periodiccnt];	2074	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1734	adjustheap ((WT *)periodics, periodiccnt, active);	2075	adjustheap (periodics, periodiccnt, active);
1735	}	2076	}
		2077
		2078	--periodiccnt;
1736	}	2079	}
1737		2080
1738	ev_stop (EV_A_ (W)w);	2081	ev_stop (EV_A_ (W)w);
1739	}	2082	}
1740		2083
…		…
1760	if (expect_false (ev_is_active (w)))	2103	if (expect_false (ev_is_active (w)))
1761	return;	2104	return;
1762		2105
1763	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2106	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1764		2107
		2108	evpipe_init (EV_A);
		2109
		2110	{
		2111	#ifndef _WIN32
		2112	sigset_t full, prev;
		2113	sigfillset (&full);
		2114	sigprocmask (SIG_SETMASK, &full, &prev);
		2115	#endif
		2116
		2117	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2118
		2119	#ifndef _WIN32
		2120	sigprocmask (SIG_SETMASK, &prev, 0);
		2121	#endif
		2122	}
		2123
1765	ev_start (EV_A_ (W)w, 1);	2124	ev_start (EV_A_ (W)w, 1);
1766	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1767	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2125	wlist_add (&signals [w->signum - 1].head, (WL)w);
1768		2126
1769	if (!((WL)w)->next)	2127	if (!((WL)w)->next)
1770	{	2128	{
1771	#if _WIN32	2129	#if _WIN32
1772	signal (w->signum, sighandler);	2130	signal (w->signum, ev_sighandler);
1773	#else	2131	#else
1774	struct sigaction sa;	2132	struct sigaction sa;
1775	sa.sa_handler = sighandler;	2133	sa.sa_handler = ev_sighandler;
1776	sigfillset (&sa.sa_mask);	2134	sigfillset (&sa.sa_mask);
1777	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2135	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1778	sigaction (w->signum, &sa, 0);	2136	sigaction (w->signum, &sa, 0);
1779	#endif	2137	#endif
1780	}	2138	}
…		…
1785	{	2143	{
1786	clear_pending (EV_A_ (W)w);	2144	clear_pending (EV_A_ (W)w);
1787	if (expect_false (!ev_is_active (w)))	2145	if (expect_false (!ev_is_active (w)))
1788	return;	2146	return;
1789		2147
1790	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2148	wlist_del (&signals [w->signum - 1].head, (WL)w);
1791	ev_stop (EV_A_ (W)w);	2149	ev_stop (EV_A_ (W)w);
1792		2150
1793	if (!signals [w->signum - 1].head)	2151	if (!signals [w->signum - 1].head)
1794	signal (w->signum, SIG_DFL);	2152	signal (w->signum, SIG_DFL);
1795	}	2153	}
…		…
1802	#endif	2160	#endif
1803	if (expect_false (ev_is_active (w)))	2161	if (expect_false (ev_is_active (w)))
1804	return;	2162	return;
1805		2163
1806	ev_start (EV_A_ (W)w, 1);	2164	ev_start (EV_A_ (W)w, 1);
1807	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2165	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1808	}	2166	}
1809		2167
1810	void	2168	void
1811	ev_child_stop (EV_P_ ev_child *w)	2169	ev_child_stop (EV_P_ ev_child *w)
1812	{	2170	{
1813	clear_pending (EV_A_ (W)w);	2171	clear_pending (EV_A_ (W)w);
1814	if (expect_false (!ev_is_active (w)))	2172	if (expect_false (!ev_is_active (w)))
1815	return;	2173	return;
1816		2174
1817	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2175	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1818	ev_stop (EV_A_ (W)w);	2176	ev_stop (EV_A_ (W)w);
1819	}	2177	}
1820		2178
1821	#if EV_STAT_ENABLE	2179	#if EV_STAT_ENABLE
1822		2180
…		…
1841	if (w->wd < 0)	2199	if (w->wd < 0)
1842	{	2200	{
1843	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2201	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1844		2202
1845	/* monitor some parent directory for speedup hints */	2203	/* monitor some parent directory for speedup hints */
		2204	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2205	/* but an efficiency issue only */
1846	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2206	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1847	{	2207	{
1848	char path [4096];	2208	char path [4096];
1849	strcpy (path, w->path);	2209	strcpy (path, w->path);
1850		2210
…		…
2095	clear_pending (EV_A_ (W)w);	2455	clear_pending (EV_A_ (W)w);
2096	if (expect_false (!ev_is_active (w)))	2456	if (expect_false (!ev_is_active (w)))
2097	return;	2457	return;
2098		2458
2099	{	2459	{
2100	int active = ((W)w)->active;	2460	int active = ev_active (w);
2101		2461
2102	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2462	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2103	((W)idles [ABSPRI (w)][active - 1])->active = active;	2463	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2104		2464
2105	ev_stop (EV_A_ (W)w);	2465	ev_stop (EV_A_ (W)w);
2106	--idleall;	2466	--idleall;
2107	}	2467	}
2108	}	2468	}
…		…
2125	clear_pending (EV_A_ (W)w);	2485	clear_pending (EV_A_ (W)w);
2126	if (expect_false (!ev_is_active (w)))	2486	if (expect_false (!ev_is_active (w)))
2127	return;	2487	return;
2128		2488
2129	{	2489	{
2130	int active = ((W)w)->active;	2490	int active = ev_active (w);
		2491
2131	prepares [active - 1] = prepares [--preparecnt];	2492	prepares [active - 1] = prepares [--preparecnt];
2132	((W)prepares [active - 1])->active = active;	2493	ev_active (prepares [active - 1]) = active;
2133	}	2494	}
2134		2495
2135	ev_stop (EV_A_ (W)w);	2496	ev_stop (EV_A_ (W)w);
2136	}	2497	}
2137		2498
…		…
2152	clear_pending (EV_A_ (W)w);	2513	clear_pending (EV_A_ (W)w);
2153	if (expect_false (!ev_is_active (w)))	2514	if (expect_false (!ev_is_active (w)))
2154	return;	2515	return;
2155		2516
2156	{	2517	{
2157	int active = ((W)w)->active;	2518	int active = ev_active (w);
		2519
2158	checks [active - 1] = checks [--checkcnt];	2520	checks [active - 1] = checks [--checkcnt];
2159	((W)checks [active - 1])->active = active;	2521	ev_active (checks [active - 1]) = active;
2160	}	2522	}
2161		2523
2162	ev_stop (EV_A_ (W)w);	2524	ev_stop (EV_A_ (W)w);
2163	}	2525	}
2164		2526
2165	#if EV_EMBED_ENABLE	2527	#if EV_EMBED_ENABLE
2166	void noinline	2528	void noinline
2167	ev_embed_sweep (EV_P_ ev_embed *w)	2529	ev_embed_sweep (EV_P_ ev_embed *w)
2168	{	2530	{
2169	ev_loop (w->loop, EVLOOP_NONBLOCK);	2531	ev_loop (w->other, EVLOOP_NONBLOCK);
2170	}	2532	}
2171		2533
2172	static void	2534	static void
2173	embed_cb (EV_P_ ev_io *io, int revents)	2535	embed_io_cb (EV_P_ ev_io *io, int revents)
2174	{	2536	{
2175	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	2537	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2176		2538
2177	if (ev_cb (w))	2539	if (ev_cb (w))
2178	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2540	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2179	else	2541	else
2180	ev_embed_sweep (loop, w);	2542	ev_loop (w->other, EVLOOP_NONBLOCK);
2181	}	2543	}
		2544
		2545	static void
		2546	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2547	{
		2548	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2549
		2550	{
		2551	struct ev_loop *loop = w->other;
		2552
		2553	while (fdchangecnt)
		2554	{
		2555	fd_reify (EV_A);
		2556	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2557	}
		2558	}
		2559	}
		2560
		2561	#if 0
		2562	static void
		2563	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2564	{
		2565	ev_idle_stop (EV_A_ idle);
		2566	}
		2567	#endif
2182		2568
2183	void	2569	void
2184	ev_embed_start (EV_P_ ev_embed *w)	2570	ev_embed_start (EV_P_ ev_embed *w)
2185	{	2571	{
2186	if (expect_false (ev_is_active (w)))	2572	if (expect_false (ev_is_active (w)))
2187	return;	2573	return;
2188		2574
2189	{	2575	{
2190	struct ev_loop *loop = w->loop;	2576	struct ev_loop *loop = w->other;
2191	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2577	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2192	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2578	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2193	}	2579	}
2194		2580
2195	ev_set_priority (&w->io, ev_priority (w));	2581	ev_set_priority (&w->io, ev_priority (w));
2196	ev_io_start (EV_A_ &w->io);	2582	ev_io_start (EV_A_ &w->io);
		2583
		2584	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2585	ev_set_priority (&w->prepare, EV_MINPRI);
		2586	ev_prepare_start (EV_A_ &w->prepare);
		2587
		2588	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2197		2589
2198	ev_start (EV_A_ (W)w, 1);	2590	ev_start (EV_A_ (W)w, 1);
2199	}	2591	}
2200		2592
2201	void	2593	void
…		…
2204	clear_pending (EV_A_ (W)w);	2596	clear_pending (EV_A_ (W)w);
2205	if (expect_false (!ev_is_active (w)))	2597	if (expect_false (!ev_is_active (w)))
2206	return;	2598	return;
2207		2599
2208	ev_io_stop (EV_A_ &w->io);	2600	ev_io_stop (EV_A_ &w->io);
		2601	ev_prepare_stop (EV_A_ &w->prepare);
2209		2602
2210	ev_stop (EV_A_ (W)w);	2603	ev_stop (EV_A_ (W)w);
2211	}	2604	}
2212	#endif	2605	#endif
2213		2606
…		…
2229	clear_pending (EV_A_ (W)w);	2622	clear_pending (EV_A_ (W)w);
2230	if (expect_false (!ev_is_active (w)))	2623	if (expect_false (!ev_is_active (w)))
2231	return;	2624	return;
2232		2625
2233	{	2626	{
2234	int active = ((W)w)->active;	2627	int active = ev_active (w);
		2628
2235	forks [active - 1] = forks [--forkcnt];	2629	forks [active - 1] = forks [--forkcnt];
2236	((W)forks [active - 1])->active = active;	2630	ev_active (forks [active - 1]) = active;
2237	}	2631	}
2238		2632
2239	ev_stop (EV_A_ (W)w);	2633	ev_stop (EV_A_ (W)w);
		2634	}
		2635	#endif
		2636
		2637	#if EV_ASYNC_ENABLE
		2638	void
		2639	ev_async_start (EV_P_ ev_async *w)
		2640	{
		2641	if (expect_false (ev_is_active (w)))
		2642	return;
		2643
		2644	evpipe_init (EV_A);
		2645
		2646	ev_start (EV_A_ (W)w, ++asynccnt);
		2647	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2648	asyncs [asynccnt - 1] = w;
		2649	}
		2650
		2651	void
		2652	ev_async_stop (EV_P_ ev_async *w)
		2653	{
		2654	clear_pending (EV_A_ (W)w);
		2655	if (expect_false (!ev_is_active (w)))
		2656	return;
		2657
		2658	{
		2659	int active = ev_active (w);
		2660
		2661	asyncs [active - 1] = asyncs [--asynccnt];
		2662	ev_active (asyncs [active - 1]) = active;
		2663	}
		2664
		2665	ev_stop (EV_A_ (W)w);
		2666	}
		2667
		2668	void
		2669	ev_async_send (EV_P_ ev_async *w)
		2670	{
		2671	w->sent = 1;
		2672	evpipe_write (EV_A_ &gotasync);
2240	}	2673	}
2241	#endif	2674	#endif
2242		2675
2243	/*****************************************************************************/	2676	/*****************************************************************************/
2244		2677
…		…
2302	ev_timer_set (&once->to, timeout, 0.);	2735	ev_timer_set (&once->to, timeout, 0.);
2303	ev_timer_start (EV_A_ &once->to);	2736	ev_timer_start (EV_A_ &once->to);
2304	}	2737	}
2305	}	2738	}
2306		2739
		2740	#if EV_MULTIPLICITY
		2741	#include "ev_wrap.h"
		2742	#endif
		2743
2307	#ifdef __cplusplus	2744	#ifdef __cplusplus
2308	}	2745	}
2309	#endif	2746	#endif
2310		2747

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