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Comparing libev/ev.c (file contents):
Revision 1.189 by root, Thu Dec 20 10:12:22 2007 UTC vs.
Revision 1.234 by root, Tue May 6 23:42:16 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
…		…
207	#if !EV_STAT_ENABLE	252	#if !EV_STAT_ENABLE
208	# undef EV_USE_INOTIFY	253	# undef EV_USE_INOTIFY
209	# define EV_USE_INOTIFY 0	254	# define EV_USE_INOTIFY 0
210	#endif	255	#endif
211		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
212	#if EV_USE_INOTIFY	263	#if EV_USE_INOTIFY
213	# include <sys/inotify.h>	264	# include <sys/inotify.h>
214	#endif	265	#endif
215		266
216	#if EV_SELECT_IS_WINSOCKET	267	#if EV_SELECT_IS_WINSOCKET
217	# include <winsock.h>	268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		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" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
218	#endif	281	#endif
219		282
220	/**/	283	/**/
221		284
222	/*	285	/*
…		…
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;
…		…
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
553	{	671	{
…		…
641	}	759	}
642	}	760	}
643		761
644	/*****************************************************************************/	762	/*****************************************************************************/
645		763
		764	/* towards the root */
646	void inline_speed	765	void inline_speed
647	upheap (WT *heap, int k)	766	upheap (WT *heap, int k)
648	{	767	{
649	WT w = heap [k];	768	WT w = heap [k];
650		769
651	while (k)	770	for (;;)
652	{	771	{
653	int p = (k - 1) >> 1;	772	int p = k >> 1;
654		773
		774	/* maybe we could use a dummy element at heap [0]? */
655	if (heap [p]->at <= w->at)	775	if (!p || heap [p]->at <= w->at)
656	break;	776	break;
657		777
658	heap [k] = heap [p];	778	heap [k] = heap [p];
659	((W)heap [k])->active = k + 1;	779	ev_active (heap [k]) = k;
660	k = p;	780	k = p;
661	}	781	}
662		782
663	heap [k] = w;	783	heap [k] = w;
664	((W)heap [k])->active = k + 1;	784	ev_active (heap [k]) = k;
665	}	785	}
666		786
		787	/* away from the root */
667	void inline_speed	788	void inline_speed
668	downheap (WT *heap, int N, int k)	789	downheap (WT *heap, int N, int k)
669	{	790	{
670	WT w = heap [k];	791	WT w = heap [k];
671		792
672	for (;;)	793	for (;;)
673	{	794	{
674	int c = (k << 1) + 1;	795	int c = k << 1;
675		796
676	if (c >= N)	797	if (c > N)
677	break;	798	break;
678		799
679	c += c + 1 < N && heap [c]->at > heap [c + 1]->at	800	c += c < N && heap [c]->at > heap [c + 1]->at
680	? 1 : 0;	801	? 1 : 0;
681		802
682	if (w->at <= heap [c]->at)	803	if (w->at <= heap [c]->at)
683	break;	804	break;
684		805
685	heap [k] = heap [c];	806	heap [k] = heap [c];
686	((W)heap [k])->active = k + 1;	807	ev_active (heap [k]) = k;
687		808
688	k = c;	809	k = c;
689	}	810	}
690		811
691	heap [k] = w;	812	heap [k] = w;
692	((W)heap [k])->active = k + 1;	813	ev_active (heap [k]) = k;
693	}	814	}
694		815
695	void inline_size	816	void inline_size
696	adjustheap (WT *heap, int N, int k)	817	adjustheap (WT *heap, int N, int k)
697	{	818	{
…		…
702	/*****************************************************************************/	823	/*****************************************************************************/
703		824
704	typedef struct	825	typedef struct
705	{	826	{
706	WL head;	827	WL head;
707	sig_atomic_t volatile gotsig;	828	EV_ATOMIC_T gotsig;
708	} ANSIG;	829	} ANSIG;
709		830
710	static ANSIG *signals;	831	static ANSIG *signals;
711	static int signalmax;	832	static int signalmax;
712		833
713	static int sigpipe [2];	834	static EV_ATOMIC_T gotsig;
714	static sig_atomic_t volatile gotsig;
715	static ev_io sigev;
716		835
717	void inline_size	836	void inline_size
718	signals_init (ANSIG *base, int count)	837	signals_init (ANSIG *base, int count)
719	{	838	{
720	while (count--)	839	while (count--)
…		…
724		843
725	++base;	844	++base;
726	}	845	}
727	}	846	}
728		847
729	static void	848	/*****************************************************************************/
730	sighandler (int signum)
731	{
732	#if _WIN32
733	signal (signum, sighandler);
734	#endif
735
736	signals [signum - 1].gotsig = 1;
737
738	if (!gotsig)
739	{
740	int old_errno = errno;
741	gotsig = 1;
742	write (sigpipe [1], &signum, 1);
743	errno = old_errno;
744	}
745	}
746
747	void noinline
748	ev_feed_signal_event (EV_P_ int signum)
749	{
750	WL w;
751
752	#if EV_MULTIPLICITY
753	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
754	#endif
755
756	--signum;
757
758	if (signum < 0 || signum >= signalmax)
759	return;
760
761	signals [signum].gotsig = 0;
762
763	for (w = signals [signum].head; w; w = w->next)
764	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
765	}
766
767	static void
768	sigcb (EV_P_ ev_io *iow, int revents)
769	{
770	int signum;
771
772	read (sigpipe [0], &revents, 1);
773	gotsig = 0;
774
775	for (signum = signalmax; signum--; )
776	if (signals [signum].gotsig)
777	ev_feed_signal_event (EV_A_ signum + 1);
778	}
779		849
780	void inline_speed	850	void inline_speed
781	fd_intern (int fd)	851	fd_intern (int fd)
782	{	852	{
783	#ifdef _WIN32	853	#ifdef _WIN32
…		…
788	fcntl (fd, F_SETFL, O_NONBLOCK);	858	fcntl (fd, F_SETFL, O_NONBLOCK);
789	#endif	859	#endif
790	}	860	}
791		861
792	static void noinline	862	static void noinline
793	siginit (EV_P)	863	evpipe_init (EV_P)
794	{	864	{
		865	if (!ev_is_active (&pipeev))
		866	{
		867	#if EV_USE_EVENTFD
		868	if ((evfd = eventfd (0, 0)) >= 0)
		869	{
		870	evpipe [0] = -1;
		871	fd_intern (evfd);
		872	ev_io_set (&pipeev, evfd, EV_READ);
		873	}
		874	else
		875	#endif
		876	{
		877	while (pipe (evpipe))
		878	syserr ("(libev) error creating signal/async pipe");
		879
795	fd_intern (sigpipe [0]);	880	fd_intern (evpipe [0]);
796	fd_intern (sigpipe [1]);	881	fd_intern (evpipe [1]);
		882	ev_io_set (&pipeev, evpipe [0], EV_READ);
		883	}
797		884
798	ev_io_set (&sigev, sigpipe [0], EV_READ);
799	ev_io_start (EV_A_ &sigev);	885	ev_io_start (EV_A_ &pipeev);
800	ev_unref (EV_A); /* child watcher should not keep loop alive */	886	ev_unref (EV_A); /* watcher should not keep loop alive */
		887	}
		888	}
		889
		890	void inline_size
		891	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		892	{
		893	if (!*flag)
		894	{
		895	int old_errno = errno; /* save errno because write might clobber it */
		896
		897	*flag = 1;
		898
		899	#if EV_USE_EVENTFD
		900	if (evfd >= 0)
		901	{
		902	uint64_t counter = 1;
		903	write (evfd, &counter, sizeof (uint64_t));
		904	}
		905	else
		906	#endif
		907	write (evpipe [1], &old_errno, 1);
		908
		909	errno = old_errno;
		910	}
		911	}
		912
		913	static void
		914	pipecb (EV_P_ ev_io *iow, int revents)
		915	{
		916	#if EV_USE_EVENTFD
		917	if (evfd >= 0)
		918	{
		919	uint64_t counter;
		920	read (evfd, &counter, sizeof (uint64_t));
		921	}
		922	else
		923	#endif
		924	{
		925	char dummy;
		926	read (evpipe [0], &dummy, 1);
		927	}
		928
		929	if (gotsig && ev_is_default_loop (EV_A))
		930	{
		931	int signum;
		932	gotsig = 0;
		933
		934	for (signum = signalmax; signum--; )
		935	if (signals [signum].gotsig)
		936	ev_feed_signal_event (EV_A_ signum + 1);
		937	}
		938
		939	#if EV_ASYNC_ENABLE
		940	if (gotasync)
		941	{
		942	int i;
		943	gotasync = 0;
		944
		945	for (i = asynccnt; i--; )
		946	if (asyncs [i]->sent)
		947	{
		948	asyncs [i]->sent = 0;
		949	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		950	}
		951	}
		952	#endif
801	}	953	}
802		954
803	/*****************************************************************************/	955	/*****************************************************************************/
804		956
		957	static void
		958	ev_sighandler (int signum)
		959	{
		960	#if EV_MULTIPLICITY
		961	struct ev_loop *loop = &default_loop_struct;
		962	#endif
		963
		964	#if _WIN32
		965	signal (signum, ev_sighandler);
		966	#endif
		967
		968	signals [signum - 1].gotsig = 1;
		969	evpipe_write (EV_A_ &gotsig);
		970	}
		971
		972	void noinline
		973	ev_feed_signal_event (EV_P_ int signum)
		974	{
		975	WL w;
		976
		977	#if EV_MULTIPLICITY
		978	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		979	#endif
		980
		981	--signum;
		982
		983	if (signum < 0 || signum >= signalmax)
		984	return;
		985
		986	signals [signum].gotsig = 0;
		987
		988	for (w = signals [signum].head; w; w = w->next)
		989	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		990	}
		991
		992	/*****************************************************************************/
		993
805	static WL childs [EV_PID_HASHSIZE];	994	static WL childs [EV_PID_HASHSIZE];
806		995
807	#ifndef _WIN32	996	#ifndef _WIN32
808		997
809	static ev_signal childev;	998	static ev_signal childev;
810		999
		1000	#ifndef WIFCONTINUED
		1001	# define WIFCONTINUED(status) 0
		1002	#endif
		1003
811	void inline_speed	1004	void inline_speed
812	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1005	child_reap (EV_P_ int chain, int pid, int status)
813	{	1006	{
814	ev_child *w;	1007	ev_child *w;
		1008	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
815		1009
816	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1010	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1011	{
817	if (w->pid == pid || !w->pid)	1012	if ((w->pid == pid || !w->pid)
		1013	&& (!traced || (w->flags & 1)))
818	{	1014	{
819	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */	1015	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
820	w->rpid = pid;	1016	w->rpid = pid;
821	w->rstatus = status;	1017	w->rstatus = status;
822	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1018	ev_feed_event (EV_A_ (W)w, EV_CHILD);
823	}	1019	}
		1020	}
824	}	1021	}
825		1022
826	#ifndef WCONTINUED	1023	#ifndef WCONTINUED
827	# define WCONTINUED 0	1024	# define WCONTINUED 0
828	#endif	1025	#endif
…		…
837	if (!WCONTINUED	1034	if (!WCONTINUED
838	|| errno != EINVAL	1035	|| errno != EINVAL
839	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))	1036	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
840	return;	1037	return;
841		1038
842	/* make sure we are called again until all childs have been reaped */	1039	/* make sure we are called again until all children have been reaped */
843	/* we need to do it this way so that the callback gets called before we continue */	1040	/* we need to do it this way so that the callback gets called before we continue */
844	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1041	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
845		1042
846	child_reap (EV_A_ sw, pid, pid, status);	1043	child_reap (EV_A_ pid, pid, status);
847	if (EV_PID_HASHSIZE > 1)	1044	if (EV_PID_HASHSIZE > 1)
848	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1045	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
849	}	1046	}
850		1047
851	#endif	1048	#endif
852		1049
853	/*****************************************************************************/	1050	/*****************************************************************************/
…		…
925	}	1122	}
926		1123
927	unsigned int	1124	unsigned int
928	ev_embeddable_backends (void)	1125	ev_embeddable_backends (void)
929	{	1126	{
930	return EVBACKEND_EPOLL	1127	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
931	| EVBACKEND_KQUEUE	1128
932	| EVBACKEND_PORT;	1129	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1130	/* please fix it and tell me how to detect the fix */
		1131	flags &= ~EVBACKEND_EPOLL;
		1132
		1133	return flags;
933	}	1134	}
934		1135
935	unsigned int	1136	unsigned int
936	ev_backend (EV_P)	1137	ev_backend (EV_P)
937	{	1138	{
…		…
940		1141
941	unsigned int	1142	unsigned int
942	ev_loop_count (EV_P)	1143	ev_loop_count (EV_P)
943	{	1144	{
944	return loop_count;	1145	return loop_count;
		1146	}
		1147
		1148	void
		1149	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1150	{
		1151	io_blocktime = interval;
		1152	}
		1153
		1154	void
		1155	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1156	{
		1157	timeout_blocktime = interval;
945	}	1158	}
946		1159
947	static void noinline	1160	static void noinline
948	loop_init (EV_P_ unsigned int flags)	1161	loop_init (EV_P_ unsigned int flags)
949	{	1162	{
…		…
955	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1168	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
956	have_monotonic = 1;	1169	have_monotonic = 1;
957	}	1170	}
958	#endif	1171	#endif
959		1172
960	ev_rt_now = ev_time ();	1173	ev_rt_now = ev_time ();
961	mn_now = get_clock ();	1174	mn_now = get_clock ();
962	now_floor = mn_now;	1175	now_floor = mn_now;
963	rtmn_diff = ev_rt_now - mn_now;	1176	rtmn_diff = ev_rt_now - mn_now;
		1177
		1178	io_blocktime = 0.;
		1179	timeout_blocktime = 0.;
		1180	backend = 0;
		1181	backend_fd = -1;
		1182	gotasync = 0;
		1183	#if EV_USE_INOTIFY
		1184	fs_fd = -2;
		1185	#endif
964		1186
965	/* pid check not overridable via env */	1187	/* pid check not overridable via env */
966	#ifndef _WIN32	1188	#ifndef _WIN32
967	if (flags & EVFLAG_FORKCHECK)	1189	if (flags & EVFLAG_FORKCHECK)
968	curpid = getpid ();	1190	curpid = getpid ();
…		…
971	if (!(flags & EVFLAG_NOENV)	1193	if (!(flags & EVFLAG_NOENV)
972	&& !enable_secure ()	1194	&& !enable_secure ()
973	&& getenv ("LIBEV_FLAGS"))	1195	&& getenv ("LIBEV_FLAGS"))
974	flags = atoi (getenv ("LIBEV_FLAGS"));	1196	flags = atoi (getenv ("LIBEV_FLAGS"));
975		1197
976	if (!(flags & 0x0000ffffUL))	1198	if (!(flags & 0x0000ffffU))
977	flags |= ev_recommended_backends ();	1199	flags |= ev_recommended_backends ();
978
979	backend = 0;
980	backend_fd = -1;
981	#if EV_USE_INOTIFY
982	fs_fd = -2;
983	#endif
984		1200
985	#if EV_USE_PORT	1201	#if EV_USE_PORT
986	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1202	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
987	#endif	1203	#endif
988	#if EV_USE_KQUEUE	1204	#if EV_USE_KQUEUE
…		…
996	#endif	1212	#endif
997	#if EV_USE_SELECT	1213	#if EV_USE_SELECT
998	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1214	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
999	#endif	1215	#endif
1000		1216
1001	ev_init (&sigev, sigcb);	1217	ev_init (&pipeev, pipecb);
1002	ev_set_priority (&sigev, EV_MAXPRI);	1218	ev_set_priority (&pipeev, EV_MAXPRI);
1003	}	1219	}
1004	}	1220	}
1005		1221
1006	static void noinline	1222	static void noinline
1007	loop_destroy (EV_P)	1223	loop_destroy (EV_P)
1008	{	1224	{
1009	int i;	1225	int i;
		1226
		1227	if (ev_is_active (&pipeev))
		1228	{
		1229	ev_ref (EV_A); /* signal watcher */
		1230	ev_io_stop (EV_A_ &pipeev);
		1231
		1232	#if EV_USE_EVENTFD
		1233	if (evfd >= 0)
		1234	close (evfd);
		1235	#endif
		1236
		1237	if (evpipe [0] >= 0)
		1238	{
		1239	close (evpipe [0]);
		1240	close (evpipe [1]);
		1241	}
		1242	}
1010		1243
1011	#if EV_USE_INOTIFY	1244	#if EV_USE_INOTIFY
1012	if (fs_fd >= 0)	1245	if (fs_fd >= 0)
1013	close (fs_fd);	1246	close (fs_fd);
1014	#endif	1247	#endif
…		…
1051	#if EV_FORK_ENABLE	1284	#if EV_FORK_ENABLE
1052	array_free (fork, EMPTY);	1285	array_free (fork, EMPTY);
1053	#endif	1286	#endif
1054	array_free (prepare, EMPTY);	1287	array_free (prepare, EMPTY);
1055	array_free (check, EMPTY);	1288	array_free (check, EMPTY);
		1289	#if EV_ASYNC_ENABLE
		1290	array_free (async, EMPTY);
		1291	#endif
1056		1292
1057	backend = 0;	1293	backend = 0;
1058	}	1294	}
1059		1295
		1296	#if EV_USE_INOTIFY
1060	void inline_size infy_fork (EV_P);	1297	void inline_size infy_fork (EV_P);
		1298	#endif
1061		1299
1062	void inline_size	1300	void inline_size
1063	loop_fork (EV_P)	1301	loop_fork (EV_P)
1064	{	1302	{
1065	#if EV_USE_PORT	1303	#if EV_USE_PORT
…		…
1073	#endif	1311	#endif
1074	#if EV_USE_INOTIFY	1312	#if EV_USE_INOTIFY
1075	infy_fork (EV_A);	1313	infy_fork (EV_A);
1076	#endif	1314	#endif
1077		1315
1078	if (ev_is_active (&sigev))	1316	if (ev_is_active (&pipeev))
1079	{	1317	{
1080	/* default loop */	1318	/* this "locks" the handlers against writing to the pipe */
		1319	/* while we modify the fd vars */
		1320	gotsig = 1;
		1321	#if EV_ASYNC_ENABLE
		1322	gotasync = 1;
		1323	#endif
1081		1324
1082	ev_ref (EV_A);	1325	ev_ref (EV_A);
1083	ev_io_stop (EV_A_ &sigev);	1326	ev_io_stop (EV_A_ &pipeev);
		1327
		1328	#if EV_USE_EVENTFD
		1329	if (evfd >= 0)
		1330	close (evfd);
		1331	#endif
		1332
		1333	if (evpipe [0] >= 0)
		1334	{
1084	close (sigpipe [0]);	1335	close (evpipe [0]);
1085	close (sigpipe [1]);	1336	close (evpipe [1]);
		1337	}
1086		1338
1087	while (pipe (sigpipe))
1088	syserr ("(libev) error creating pipe");
1089
1090	siginit (EV_A);	1339	evpipe_init (EV_A);
		1340	/* now iterate over everything, in case we missed something */
		1341	pipecb (EV_A_ &pipeev, EV_READ);
1091	}	1342	}
1092		1343
1093	postfork = 0;	1344	postfork = 0;
1094	}	1345	}
1095		1346
…		…
1117	}	1368	}
1118		1369
1119	void	1370	void
1120	ev_loop_fork (EV_P)	1371	ev_loop_fork (EV_P)
1121	{	1372	{
1122	postfork = 1;	1373	postfork = 1; /* must be in line with ev_default_fork */
1123	}	1374	}
1124
1125	#endif	1375	#endif
1126		1376
1127	#if EV_MULTIPLICITY	1377	#if EV_MULTIPLICITY
1128	struct ev_loop *	1378	struct ev_loop *
1129	ev_default_loop_init (unsigned int flags)	1379	ev_default_loop_init (unsigned int flags)
1130	#else	1380	#else
1131	int	1381	int
1132	ev_default_loop (unsigned int flags)	1382	ev_default_loop (unsigned int flags)
1133	#endif	1383	#endif
1134	{	1384	{
1135	if (sigpipe [0] == sigpipe [1])
1136	if (pipe (sigpipe))
1137	return 0;
1138
1139	if (!ev_default_loop_ptr)	1385	if (!ev_default_loop_ptr)
1140	{	1386	{
1141	#if EV_MULTIPLICITY	1387	#if EV_MULTIPLICITY
1142	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1388	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1143	#else	1389	#else
…		…
1146		1392
1147	loop_init (EV_A_ flags);	1393	loop_init (EV_A_ flags);
1148		1394
1149	if (ev_backend (EV_A))	1395	if (ev_backend (EV_A))
1150	{	1396	{
1151	siginit (EV_A);
1152
1153	#ifndef _WIN32	1397	#ifndef _WIN32
1154	ev_signal_init (&childev, childcb, SIGCHLD);	1398	ev_signal_init (&childev, childcb, SIGCHLD);
1155	ev_set_priority (&childev, EV_MAXPRI);	1399	ev_set_priority (&childev, EV_MAXPRI);
1156	ev_signal_start (EV_A_ &childev);	1400	ev_signal_start (EV_A_ &childev);
1157	ev_unref (EV_A); /* child watcher should not keep loop alive */	1401	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1174	#ifndef _WIN32	1418	#ifndef _WIN32
1175	ev_ref (EV_A); /* child watcher */	1419	ev_ref (EV_A); /* child watcher */
1176	ev_signal_stop (EV_A_ &childev);	1420	ev_signal_stop (EV_A_ &childev);
1177	#endif	1421	#endif
1178		1422
1179	ev_ref (EV_A); /* signal watcher */
1180	ev_io_stop (EV_A_ &sigev);
1181
1182	close (sigpipe [0]); sigpipe [0] = 0;
1183	close (sigpipe [1]); sigpipe [1] = 0;
1184
1185	loop_destroy (EV_A);	1423	loop_destroy (EV_A);
1186	}	1424	}
1187		1425
1188	void	1426	void
1189	ev_default_fork (void)	1427	ev_default_fork (void)
…		…
1191	#if EV_MULTIPLICITY	1429	#if EV_MULTIPLICITY
1192	struct ev_loop *loop = ev_default_loop_ptr;	1430	struct ev_loop *loop = ev_default_loop_ptr;
1193	#endif	1431	#endif
1194		1432
1195	if (backend)	1433	if (backend)
1196	postfork = 1;	1434	postfork = 1; /* must be in line with ev_loop_fork */
1197	}	1435	}
1198		1436
1199	/*****************************************************************************/	1437	/*****************************************************************************/
1200		1438
1201	void	1439	void
…		…
1221	p->w->pending = 0;	1459	p->w->pending = 0;
1222	EV_CB_INVOKE (p->w, p->events);	1460	EV_CB_INVOKE (p->w, p->events);
1223	}	1461	}
1224	}	1462	}
1225	}	1463	}
1226
1227	void inline_size
1228	timers_reify (EV_P)
1229	{
1230	while (timercnt && ((WT)timers [0])->at <= mn_now)
1231	{
1232	ev_timer *w = (ev_timer *)timers [0];
1233
1234	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1235
1236	/* first reschedule or stop timer */
1237	if (w->repeat)
1238	{
1239	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1240
1241	((WT)w)->at += w->repeat;
1242	if (((WT)w)->at < mn_now)
1243	((WT)w)->at = mn_now;
1244
1245	downheap (timers, timercnt, 0);
1246	}
1247	else
1248	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1249
1250	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1251	}
1252	}
1253
1254	#if EV_PERIODIC_ENABLE
1255	void inline_size
1256	periodics_reify (EV_P)
1257	{
1258	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1259	{
1260	ev_periodic *w = (ev_periodic *)periodics [0];
1261
1262	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1263
1264	/* first reschedule or stop timer */
1265	if (w->reschedule_cb)
1266	{
1267	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1268	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1269	downheap (periodics, periodiccnt, 0);
1270	}
1271	else if (w->interval)
1272	{
1273	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1274	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1275	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1276	downheap (periodics, periodiccnt, 0);
1277	}
1278	else
1279	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1280
1281	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1282	}
1283	}
1284
1285	static void noinline
1286	periodics_reschedule (EV_P)
1287	{
1288	int i;
1289
1290	/* adjust periodics after time jump */
1291	for (i = 0; i < periodiccnt; ++i)
1292	{
1293	ev_periodic *w = (ev_periodic *)periodics [i];
1294
1295	if (w->reschedule_cb)
1296	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1297	else if (w->interval)
1298	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1299	}
1300
1301	/* now rebuild the heap */
1302	for (i = periodiccnt >> 1; i--; )
1303	downheap (periodics, periodiccnt, i);
1304	}
1305	#endif
1306		1464
1307	#if EV_IDLE_ENABLE	1465	#if EV_IDLE_ENABLE
1308	void inline_size	1466	void inline_size
1309	idle_reify (EV_P)	1467	idle_reify (EV_P)
1310	{	1468	{
…		…
1322	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);	1480	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1323	break;	1481	break;
1324	}	1482	}
1325	}	1483	}
1326	}	1484	}
		1485	}
		1486	#endif
		1487
		1488	void inline_size
		1489	timers_reify (EV_P)
		1490	{
		1491	while (timercnt && ev_at (timers [1]) <= mn_now)
		1492	{
		1493	ev_timer *w = (ev_timer *)timers [1];
		1494
		1495	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1496
		1497	/* first reschedule or stop timer */
		1498	if (w->repeat)
		1499	{
		1500	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1501
		1502	ev_at (w) += w->repeat;
		1503	if (ev_at (w) < mn_now)
		1504	ev_at (w) = mn_now;
		1505
		1506	downheap (timers, timercnt, 1);
		1507	}
		1508	else
		1509	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1510
		1511	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1512	}
		1513	}
		1514
		1515	#if EV_PERIODIC_ENABLE
		1516	void inline_size
		1517	periodics_reify (EV_P)
		1518	{
		1519	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
		1520	{
		1521	ev_periodic *w = (ev_periodic *)periodics [1];
		1522
		1523	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1524
		1525	/* first reschedule or stop timer */
		1526	if (w->reschedule_cb)
		1527	{
		1528	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1529	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1530	downheap (periodics, periodiccnt, 1);
		1531	}
		1532	else if (w->interval)
		1533	{
		1534	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1535	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1536	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1537	downheap (periodics, periodiccnt, 1);
		1538	}
		1539	else
		1540	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1541
		1542	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1543	}
		1544	}
		1545
		1546	static void noinline
		1547	periodics_reschedule (EV_P)
		1548	{
		1549	int i;
		1550
		1551	/* adjust periodics after time jump */
		1552	for (i = 1; i <= periodiccnt; ++i)
		1553	{
		1554	ev_periodic *w = (ev_periodic *)periodics [i];
		1555
		1556	if (w->reschedule_cb)
		1557	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1558	else if (w->interval)
		1559	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1560	}
		1561
		1562	/* now rebuild the heap */
		1563	for (i = periodiccnt >> 1; i--; )
		1564	downheap (periodics, periodiccnt, i);
1327	}	1565	}
1328	#endif	1566	#endif
1329		1567
1330	void inline_speed	1568	void inline_speed
1331	time_update (EV_P_ ev_tstamp max_block)	1569	time_update (EV_P_ ev_tstamp max_block)
…		…
1360	*/	1598	*/
1361	for (i = 4; --i; )	1599	for (i = 4; --i; )
1362	{	1600	{
1363	rtmn_diff = ev_rt_now - mn_now;	1601	rtmn_diff = ev_rt_now - mn_now;
1364		1602
1365	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1603	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1366	return; /* all is well */	1604	return; /* all is well */
1367		1605
1368	ev_rt_now = ev_time ();	1606	ev_rt_now = ev_time ();
1369	mn_now = get_clock ();	1607	mn_now = get_clock ();
1370	now_floor = mn_now;	1608	now_floor = mn_now;
…		…
1385	{	1623	{
1386	#if EV_PERIODIC_ENABLE	1624	#if EV_PERIODIC_ENABLE
1387	periodics_reschedule (EV_A);	1625	periodics_reschedule (EV_A);
1388	#endif	1626	#endif
1389	/* adjust timers. this is easy, as the offset is the same for all of them */	1627	/* adjust timers. this is easy, as the offset is the same for all of them */
1390	for (i = 0; i < timercnt; ++i)	1628	for (i = 1; i <= timercnt; ++i)
1391	((WT)timers [i])->at += ev_rt_now - mn_now;	1629	ev_at (timers [i]) += ev_rt_now - mn_now;
1392	}	1630	}
1393		1631
1394	mn_now = ev_rt_now;	1632	mn_now = ev_rt_now;
1395	}	1633	}
1396	}	1634	}
…		…
1410	static int loop_done;	1648	static int loop_done;
1411		1649
1412	void	1650	void
1413	ev_loop (EV_P_ int flags)	1651	ev_loop (EV_P_ int flags)
1414	{	1652	{
1415	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	1653	loop_done = EVUNLOOP_CANCEL;
1416	? EVUNLOOP_ONE
1417	: EVUNLOOP_CANCEL;
1418		1654
1419	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1655	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1420		1656
1421	do	1657	do
1422	{	1658	{
…		…
1456	/* update fd-related kernel structures */	1692	/* update fd-related kernel structures */
1457	fd_reify (EV_A);	1693	fd_reify (EV_A);
1458		1694
1459	/* calculate blocking time */	1695	/* calculate blocking time */
1460	{	1696	{
1461	ev_tstamp block;	1697	ev_tstamp waittime = 0.;
		1698	ev_tstamp sleeptime = 0.;
1462		1699
1463	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))	1700	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1464	block = 0.; /* do not block at all */
1465	else
1466	{	1701	{
1467	/* update time to cancel out callback processing overhead */	1702	/* update time to cancel out callback processing overhead */
1468	time_update (EV_A_ 1e100);	1703	time_update (EV_A_ 1e100);
1469		1704
1470	block = MAX_BLOCKTIME;	1705	waittime = MAX_BLOCKTIME;
1471		1706
1472	if (timercnt)	1707	if (timercnt)
1473	{	1708	{
1474	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1709	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
1475	if (block > to) block = to;	1710	if (waittime > to) waittime = to;
1476	}	1711	}
1477		1712
1478	#if EV_PERIODIC_ENABLE	1713	#if EV_PERIODIC_ENABLE
1479	if (periodiccnt)	1714	if (periodiccnt)
1480	{	1715	{
1481	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1716	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
1482	if (block > to) block = to;	1717	if (waittime > to) waittime = to;
1483	}	1718	}
1484	#endif	1719	#endif
1485		1720
1486	if (expect_false (block < 0.)) block = 0.;	1721	if (expect_false (waittime < timeout_blocktime))
		1722	waittime = timeout_blocktime;
		1723
		1724	sleeptime = waittime - backend_fudge;
		1725
		1726	if (expect_true (sleeptime > io_blocktime))
		1727	sleeptime = io_blocktime;
		1728
		1729	if (sleeptime)
		1730	{
		1731	ev_sleep (sleeptime);
		1732	waittime -= sleeptime;
		1733	}
1487	}	1734	}
1488		1735
1489	++loop_count;	1736	++loop_count;
1490	backend_poll (EV_A_ block);	1737	backend_poll (EV_A_ waittime);
1491		1738
1492	/* update ev_rt_now, do magic */	1739	/* update ev_rt_now, do magic */
1493	time_update (EV_A_ block);	1740	time_update (EV_A_ waittime + sleeptime);
1494	}	1741	}
1495		1742
1496	/* queue pending timers and reschedule them */	1743	/* queue pending timers and reschedule them */
1497	timers_reify (EV_A); /* relative timers called last */	1744	timers_reify (EV_A); /* relative timers called last */
1498	#if EV_PERIODIC_ENABLE	1745	#if EV_PERIODIC_ENABLE
…		…
1507	/* queue check watchers, to be executed first */	1754	/* queue check watchers, to be executed first */
1508	if (expect_false (checkcnt))	1755	if (expect_false (checkcnt))
1509	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1756	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1510		1757
1511	call_pending (EV_A);	1758	call_pending (EV_A);
1512
1513	}	1759	}
1514	while (expect_true (activecnt && !loop_done));	1760	while (expect_true (
		1761	activecnt
		1762	&& !loop_done
		1763	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1764	));
1515		1765
1516	if (loop_done == EVUNLOOP_ONE)	1766	if (loop_done == EVUNLOOP_ONE)
1517	loop_done = EVUNLOOP_CANCEL;	1767	loop_done = EVUNLOOP_CANCEL;
1518	}	1768	}
1519		1769
…		…
1637	ev_timer_start (EV_P_ ev_timer *w)	1887	ev_timer_start (EV_P_ ev_timer *w)
1638	{	1888	{
1639	if (expect_false (ev_is_active (w)))	1889	if (expect_false (ev_is_active (w)))
1640	return;	1890	return;
1641		1891
1642	((WT)w)->at += mn_now;	1892	ev_at (w) += mn_now;
1643		1893
1644	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1894	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1645		1895
1646	ev_start (EV_A_ (W)w, ++timercnt);	1896	ev_start (EV_A_ (W)w, ++timercnt);
1647	array_needsize (WT, timers, timermax, timercnt, EMPTY2);	1897	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
1648	timers [timercnt - 1] = (WT)w;	1898	timers [timercnt] = (WT)w;
1649	upheap (timers, timercnt - 1);	1899	upheap (timers, timercnt);
1650		1900
1651	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/	1901	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1652	}	1902	}
1653		1903
1654	void noinline	1904	void noinline
1655	ev_timer_stop (EV_P_ ev_timer *w)	1905	ev_timer_stop (EV_P_ ev_timer *w)
1656	{	1906	{
1657	clear_pending (EV_A_ (W)w);	1907	clear_pending (EV_A_ (W)w);
1658	if (expect_false (!ev_is_active (w)))	1908	if (expect_false (!ev_is_active (w)))
1659	return;	1909	return;
1660		1910
1661	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1662
1663	{	1911	{
1664	int active = ((W)w)->active;	1912	int active = ev_active (w);
1665		1913
		1914	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1915
1666	if (expect_true (--active < --timercnt))	1916	if (expect_true (active < timercnt))
1667	{	1917	{
1668	timers [active] = timers [timercnt];	1918	timers [active] = timers [timercnt];
1669	adjustheap (timers, timercnt, active);	1919	adjustheap (timers, timercnt, active);
1670	}	1920	}
		1921
		1922	--timercnt;
1671	}	1923	}
1672		1924
1673	((WT)w)->at -= mn_now;	1925	ev_at (w) -= mn_now;
1674		1926
1675	ev_stop (EV_A_ (W)w);	1927	ev_stop (EV_A_ (W)w);
1676	}	1928	}
1677		1929
1678	void noinline	1930	void noinline
…		…
1680	{	1932	{
1681	if (ev_is_active (w))	1933	if (ev_is_active (w))
1682	{	1934	{
1683	if (w->repeat)	1935	if (w->repeat)
1684	{	1936	{
1685	((WT)w)->at = mn_now + w->repeat;	1937	ev_at (w) = mn_now + w->repeat;
1686	adjustheap (timers, timercnt, ((W)w)->active - 1);	1938	adjustheap (timers, timercnt, ev_active (w));
1687	}	1939	}
1688	else	1940	else
1689	ev_timer_stop (EV_A_ w);	1941	ev_timer_stop (EV_A_ w);
1690	}	1942	}
1691	else if (w->repeat)	1943	else if (w->repeat)
1692	{	1944	{
1693	w->at = w->repeat;	1945	ev_at (w) = w->repeat;
1694	ev_timer_start (EV_A_ w);	1946	ev_timer_start (EV_A_ w);
1695	}	1947	}
1696	}	1948	}
1697		1949
1698	#if EV_PERIODIC_ENABLE	1950	#if EV_PERIODIC_ENABLE
…		…
1701	{	1953	{
1702	if (expect_false (ev_is_active (w)))	1954	if (expect_false (ev_is_active (w)))
1703	return;	1955	return;
1704		1956
1705	if (w->reschedule_cb)	1957	if (w->reschedule_cb)
1706	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1958	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1707	else if (w->interval)	1959	else if (w->interval)
1708	{	1960	{
1709	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1961	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1710	/* this formula differs from the one in periodic_reify because we do not always round up */	1962	/* this formula differs from the one in periodic_reify because we do not always round up */
1711	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	1963	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1712	}	1964	}
1713	else	1965	else
1714	((WT)w)->at = w->offset;	1966	ev_at (w) = w->offset;
1715		1967
1716	ev_start (EV_A_ (W)w, ++periodiccnt);	1968	ev_start (EV_A_ (W)w, ++periodiccnt);
1717	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);	1969	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
1718	periodics [periodiccnt - 1] = (WT)w;	1970	periodics [periodiccnt] = (WT)w;
1719	upheap (periodics, periodiccnt - 1);	1971	upheap (periodics, periodiccnt);
1720		1972
1721	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	1973	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1722	}	1974	}
1723		1975
1724	void noinline	1976	void noinline
1725	ev_periodic_stop (EV_P_ ev_periodic *w)	1977	ev_periodic_stop (EV_P_ ev_periodic *w)
1726	{	1978	{
1727	clear_pending (EV_A_ (W)w);	1979	clear_pending (EV_A_ (W)w);
1728	if (expect_false (!ev_is_active (w)))	1980	if (expect_false (!ev_is_active (w)))
1729	return;	1981	return;
1730		1982
1731	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1732
1733	{	1983	{
1734	int active = ((W)w)->active;	1984	int active = ev_active (w);
1735		1985
		1986	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		1987
1736	if (expect_true (--active < --periodiccnt))	1988	if (expect_true (active < periodiccnt))
1737	{	1989	{
1738	periodics [active] = periodics [periodiccnt];	1990	periodics [active] = periodics [periodiccnt];
1739	adjustheap (periodics, periodiccnt, active);	1991	adjustheap (periodics, periodiccnt, active);
1740	}	1992	}
		1993
		1994	--periodiccnt;
1741	}	1995	}
1742		1996
1743	ev_stop (EV_A_ (W)w);	1997	ev_stop (EV_A_ (W)w);
1744	}	1998	}
1745		1999
…		…
1764	#endif	2018	#endif
1765	if (expect_false (ev_is_active (w)))	2019	if (expect_false (ev_is_active (w)))
1766	return;	2020	return;
1767		2021
1768	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2022	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2023
		2024	evpipe_init (EV_A);
1769		2025
1770	{	2026	{
1771	#ifndef _WIN32	2027	#ifndef _WIN32
1772	sigset_t full, prev;	2028	sigset_t full, prev;
1773	sigfillset (&full);	2029	sigfillset (&full);
…		…
1785	wlist_add (&signals [w->signum - 1].head, (WL)w);	2041	wlist_add (&signals [w->signum - 1].head, (WL)w);
1786		2042
1787	if (!((WL)w)->next)	2043	if (!((WL)w)->next)
1788	{	2044	{
1789	#if _WIN32	2045	#if _WIN32
1790	signal (w->signum, sighandler);	2046	signal (w->signum, ev_sighandler);
1791	#else	2047	#else
1792	struct sigaction sa;	2048	struct sigaction sa;
1793	sa.sa_handler = sighandler;	2049	sa.sa_handler = ev_sighandler;
1794	sigfillset (&sa.sa_mask);	2050	sigfillset (&sa.sa_mask);
1795	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2051	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1796	sigaction (w->signum, &sa, 0);	2052	sigaction (w->signum, &sa, 0);
1797	#endif	2053	#endif
1798	}	2054	}
…		…
1859	if (w->wd < 0)	2115	if (w->wd < 0)
1860	{	2116	{
1861	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2117	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1862		2118
1863	/* monitor some parent directory for speedup hints */	2119	/* monitor some parent directory for speedup hints */
		2120	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2121	/* but an efficiency issue only */
1864	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2122	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1865	{	2123	{
1866	char path [4096];	2124	char path [4096];
1867	strcpy (path, w->path);	2125	strcpy (path, w->path);
1868		2126
…		…
2113	clear_pending (EV_A_ (W)w);	2371	clear_pending (EV_A_ (W)w);
2114	if (expect_false (!ev_is_active (w)))	2372	if (expect_false (!ev_is_active (w)))
2115	return;	2373	return;
2116		2374
2117	{	2375	{
2118	int active = ((W)w)->active;	2376	int active = ev_active (w);
2119		2377
2120	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2378	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2121	((W)idles [ABSPRI (w)][active - 1])->active = active;	2379	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2122		2380
2123	ev_stop (EV_A_ (W)w);	2381	ev_stop (EV_A_ (W)w);
2124	--idleall;	2382	--idleall;
2125	}	2383	}
2126	}	2384	}
…		…
2143	clear_pending (EV_A_ (W)w);	2401	clear_pending (EV_A_ (W)w);
2144	if (expect_false (!ev_is_active (w)))	2402	if (expect_false (!ev_is_active (w)))
2145	return;	2403	return;
2146		2404
2147	{	2405	{
2148	int active = ((W)w)->active;	2406	int active = ev_active (w);
		2407
2149	prepares [active - 1] = prepares [--preparecnt];	2408	prepares [active - 1] = prepares [--preparecnt];
2150	((W)prepares [active - 1])->active = active;	2409	ev_active (prepares [active - 1]) = active;
2151	}	2410	}
2152		2411
2153	ev_stop (EV_A_ (W)w);	2412	ev_stop (EV_A_ (W)w);
2154	}	2413	}
2155		2414
…		…
2170	clear_pending (EV_A_ (W)w);	2429	clear_pending (EV_A_ (W)w);
2171	if (expect_false (!ev_is_active (w)))	2430	if (expect_false (!ev_is_active (w)))
2172	return;	2431	return;
2173		2432
2174	{	2433	{
2175	int active = ((W)w)->active;	2434	int active = ev_active (w);
		2435
2176	checks [active - 1] = checks [--checkcnt];	2436	checks [active - 1] = checks [--checkcnt];
2177	((W)checks [active - 1])->active = active;	2437	ev_active (checks [active - 1]) = active;
2178	}	2438	}
2179		2439
2180	ev_stop (EV_A_ (W)w);	2440	ev_stop (EV_A_ (W)w);
2181	}	2441	}
2182		2442
…		…
2193	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	2453	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2194		2454
2195	if (ev_cb (w))	2455	if (ev_cb (w))
2196	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2456	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2197	else	2457	else
2198	ev_embed_sweep (loop, w);	2458	ev_loop (w->other, EVLOOP_NONBLOCK);
2199	}	2459	}
2200		2460
2201	static void	2461	static void
2202	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	2462	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2203	{	2463	{
2204	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	2464	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2205		2465
2206	fd_reify (w->other);	2466	{
		2467	struct ev_loop *loop = w->other;
		2468
		2469	while (fdchangecnt)
		2470	{
		2471	fd_reify (EV_A);
		2472	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2473	}
		2474	}
2207	}	2475	}
		2476
		2477	#if 0
		2478	static void
		2479	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2480	{
		2481	ev_idle_stop (EV_A_ idle);
		2482	}
		2483	#endif
2208		2484
2209	void	2485	void
2210	ev_embed_start (EV_P_ ev_embed *w)	2486	ev_embed_start (EV_P_ ev_embed *w)
2211	{	2487	{
2212	if (expect_false (ev_is_active (w)))	2488	if (expect_false (ev_is_active (w)))
…		…
2223		2499
2224	ev_prepare_init (&w->prepare, embed_prepare_cb);	2500	ev_prepare_init (&w->prepare, embed_prepare_cb);
2225	ev_set_priority (&w->prepare, EV_MINPRI);	2501	ev_set_priority (&w->prepare, EV_MINPRI);
2226	ev_prepare_start (EV_A_ &w->prepare);	2502	ev_prepare_start (EV_A_ &w->prepare);
2227		2503
		2504	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2505
2228	ev_start (EV_A_ (W)w, 1);	2506	ev_start (EV_A_ (W)w, 1);
2229	}	2507	}
2230		2508
2231	void	2509	void
2232	ev_embed_stop (EV_P_ ev_embed *w)	2510	ev_embed_stop (EV_P_ ev_embed *w)
…		…
2260	clear_pending (EV_A_ (W)w);	2538	clear_pending (EV_A_ (W)w);
2261	if (expect_false (!ev_is_active (w)))	2539	if (expect_false (!ev_is_active (w)))
2262	return;	2540	return;
2263		2541
2264	{	2542	{
2265	int active = ((W)w)->active;	2543	int active = ev_active (w);
		2544
2266	forks [active - 1] = forks [--forkcnt];	2545	forks [active - 1] = forks [--forkcnt];
2267	((W)forks [active - 1])->active = active;	2546	ev_active (forks [active - 1]) = active;
2268	}	2547	}
2269		2548
2270	ev_stop (EV_A_ (W)w);	2549	ev_stop (EV_A_ (W)w);
		2550	}
		2551	#endif
		2552
		2553	#if EV_ASYNC_ENABLE
		2554	void
		2555	ev_async_start (EV_P_ ev_async *w)
		2556	{
		2557	if (expect_false (ev_is_active (w)))
		2558	return;
		2559
		2560	evpipe_init (EV_A);
		2561
		2562	ev_start (EV_A_ (W)w, ++asynccnt);
		2563	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2564	asyncs [asynccnt - 1] = w;
		2565	}
		2566
		2567	void
		2568	ev_async_stop (EV_P_ ev_async *w)
		2569	{
		2570	clear_pending (EV_A_ (W)w);
		2571	if (expect_false (!ev_is_active (w)))
		2572	return;
		2573
		2574	{
		2575	int active = ev_active (w);
		2576
		2577	asyncs [active - 1] = asyncs [--asynccnt];
		2578	ev_active (asyncs [active - 1]) = active;
		2579	}
		2580
		2581	ev_stop (EV_A_ (W)w);
		2582	}
		2583
		2584	void
		2585	ev_async_send (EV_P_ ev_async *w)
		2586	{
		2587	w->sent = 1;
		2588	evpipe_write (EV_A_ &gotasync);
2271	}	2589	}
2272	#endif	2590	#endif
2273		2591
2274	/*****************************************************************************/	2592	/*****************************************************************************/
2275		2593

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