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Comparing libev/ev.c (file contents):
Revision 1.168 by root, Sat Dec 8 14:12:07 2007 UTC vs.
Revision 1.235 by root, Wed May 7 14:45:17 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
37	# ifdef EV_CONFIG_H	46	# ifdef EV_CONFIG_H
38	# include EV_CONFIG_H	47	# include EV_CONFIG_H
39	# else	48	# else
40	# include "config.h"	49	# include "config.h"
…		…
51	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	61	# define EV_USE_MONOTONIC 0
53	# endif	62	# endif
54	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
56	# endif	73	# endif
57	# endif	74	# endif
58		75
59	# ifndef EV_USE_SELECT	76	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
102	# else	119	# else
103	# define EV_USE_INOTIFY 0	120	# define EV_USE_INOTIFY 0
104	# endif	121	# endif
105	# endif	122	# endif
106		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
107	#endif	132	#endif
108		133
109	#include <math.h>	134	#include <math.h>
110	#include <stdlib.h>	135	#include <stdlib.h>
111	#include <fcntl.h>	136	#include <fcntl.h>
…		…
136	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
137	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
138	# endif	163	# endif
139	#endif	164	#endif
140		165
141	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
142		167
143	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
144	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
145	#endif	170	#endif
146		171
147	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
149	#endif	178	#endif
150		179
151	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
153	#endif	182	#endif
…		…
159	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
160	# endif	189	# endif
161	#endif	190	#endif
162		191
163	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
164	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
165	#endif	198	#endif
166		199
167	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
168	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
169	#endif	202	#endif
…		…
171	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
172	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
173	#endif	206	#endif
174		207
175	#ifndef EV_USE_INOTIFY	208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
176	# define EV_USE_INOTIFY 0	212	# define EV_USE_INOTIFY 0
		213	# endif
177	#endif	214	#endif
178		215
179	#ifndef EV_PID_HASHSIZE	216	#ifndef EV_PID_HASHSIZE
180	# if EV_MINIMAL	217	# if EV_MINIMAL
181	# define EV_PID_HASHSIZE 1	218	# define EV_PID_HASHSIZE 1
…		…
190	# else	227	# else
191	# define EV_INOTIFY_HASHSIZE 16	228	# define EV_INOTIFY_HASHSIZE 16
192	# endif	229	# endif
193	#endif	230	#endif
194		231
195	/**/	232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196		241
197	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
198	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
199	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
200	#endif	245	#endif
…		…
202	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
203	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
204	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
205	#endif	250	#endif
206		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
207	#if EV_SELECT_IS_WINSOCKET	267	#if EV_SELECT_IS_WINSOCKET
208	# include <winsock.h>	268	# include <winsock.h>
209	#endif	269	#endif
210		270
211	#if !EV_STAT_ENABLE	271	#if EV_USE_EVENTFD
212	# define EV_USE_INOTIFY 0	272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
213	#endif	276	# endif
214		277	int eventfd (unsigned int initval, int flags);
215	#if EV_USE_INOTIFY	278	# ifdef __cplusplus
216	# include <sys/inotify.h>	279	}
		280	# endif
217	#endif	281	#endif
218		282
219	/**/	283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220		294
221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
224		298
225	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
226	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
227	# define inline_size static inline /* inline for codesize */
228	# if EV_MINIMAL
229	# define noinline __attribute__ ((noinline))	301	# define noinline __attribute__ ((noinline))
230	# define inline_speed static noinline
231	# else
232	# define noinline
233	# define inline_speed static inline
234	# endif
235	#else	302	#else
236	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
237	# define inline_speed static
238	# define inline_size static
239	# define noinline	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
240	#endif	308	#endif
241		309
242	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
243	#define expect_true(expr) expect ((expr) != 0, 1)	311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
244		319
245	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
246	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
247		322
248	#define EMPTY /* required for microsofts broken pseudo-c compiler */	323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
…		…
250		325
251	typedef ev_watcher *W;	326	typedef ev_watcher *W;
252	typedef ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
253	typedef ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
254		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 */
255	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
256		338
257	#ifdef _WIN32	339	#ifdef _WIN32
258	# include "ev_win32.c"	340	# include "ev_win32.c"
259	#endif	341	#endif
260		342
…		…
281	perror (msg);	363	perror (msg);
282	abort ();	364	abort ();
283	}	365	}
284	}	366	}
285		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
286	static void *(*alloc)(void *ptr, long size);	383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
287		384
288	void	385	void
289	ev_set_allocator (void *(*cb)(void *ptr, long size))	386	ev_set_allocator (void *(*cb)(void *ptr, long size))
290	{	387	{
291	alloc = cb;	388	alloc = cb;
292	}	389	}
293		390
294	inline_speed void *	391	inline_speed void *
295	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
296	{	393	{
297	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
298		395
299	if (!ptr && size)	396	if (!ptr && size)
300	{	397	{
301	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
302	abort ();	399	abort ();
…		…
396	{	493	{
397	return ev_rt_now;	494	return ev_rt_now;
398	}	495	}
399	#endif	496	#endif
400		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
401	int inline_size	527	int inline_size
402	array_nextsize (int elem, int cur, int cnt)	528	array_nextsize (int elem, int cur, int cnt)
403	{	529	{
404	int ncur = cur + 1;	530	int ncur = cur + 1;
405		531
406	do	532	do
407	ncur <<= 1;	533	ncur <<= 1;
408	while (cnt > ncur);	534	while (cnt > ncur);
409		535
410	/* 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 */
411	if (elem * ncur > 4096)	537	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
412	{	538	{
413	ncur *= elem;	539	ncur *= elem;
414	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;	540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
415	ncur = ncur - sizeof (void *) * 4;	541	ncur = ncur - sizeof (void *) * 4;
416	ncur /= elem;	542	ncur /= elem;
417	}	543	}
418		544
419	return ncur;	545	return ncur;
420	}	546	}
421		547
422	inline_speed void *	548	static noinline void *
423	array_realloc (int elem, void *base, int *cur, int cnt)	549	array_realloc (int elem, void *base, int *cur, int cnt)
424	{	550	{
425	*cur = array_nextsize (elem, *cur, cnt);	551	*cur = array_nextsize (elem, *cur, cnt);
426	return ev_realloc (base, elem * *cur);	552	return ev_realloc (base, elem * *cur);
427	}	553	}
…		…
452		578
453	void noinline	579	void noinline
454	ev_feed_event (EV_P_ void *w, int revents)	580	ev_feed_event (EV_P_ void *w, int revents)
455	{	581	{
456	W w_ = (W)w;	582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
457		584
458	if (expect_false (w_->pending))	585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events |= revents;
		587	else
459	{	588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
460	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;	592	pendings [pri][w_->pending - 1].events = revents;
461	return;
462	}	593	}
463
464	w_->pending = ++pendingcnt [ABSPRI (w_)];
465	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
466	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
467	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
468	}	594	}
469		595
470	void inline_size	596	void inline_speed
471	queue_events (EV_P_ W *events, int eventcnt, int type)	597	queue_events (EV_P_ W *events, int eventcnt, int type)
472	{	598	{
473	int i;	599	int i;
474		600
475	for (i = 0; i < eventcnt; ++i)	601	for (i = 0; i < eventcnt; ++i)
…		…
522	{	648	{
523	int fd = fdchanges [i];	649	int fd = fdchanges [i];
524	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
525	ev_io *w;	651	ev_io *w;
526		652
527	int events = 0;	653	unsigned char events = 0;
528		654
529	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)
530	events |= w->events;	656	events |= (unsigned char)w->events;
531		657
532	#if EV_SELECT_IS_WINSOCKET	658	#if EV_SELECT_IS_WINSOCKET
533	if (events)	659	if (events)
534	{	660	{
535	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
536	anfd->handle = _get_osfhandle (fd);	665	anfd->handle = _get_osfhandle (fd);
		666	#endif
537	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));
538	}	668	}
539	#endif	669	#endif
540		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
541	anfd->reify = 0;	675	anfd->reify = 0;
542
543	backend_modify (EV_A_ fd, anfd->events, events);
544	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	}
545	}	681	}
546		682
547	fdchangecnt = 0;	683	fdchangecnt = 0;
548	}	684	}
549		685
550	void inline_size	686	void inline_size
551	fd_change (EV_P_ int fd)	687	fd_change (EV_P_ int fd, int flags)
552	{	688	{
553	if (expect_false (anfds [fd].reify))	689	unsigned char reify = anfds [fd].reify;
554	return;
555
556	anfds [fd].reify = 1;	690	anfds [fd].reify |= flags;
557		691
		692	if (expect_true (!reify))
		693	{
558	++fdchangecnt;	694	++fdchangecnt;
559	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
560	fdchanges [fdchangecnt - 1] = fd;	696	fdchanges [fdchangecnt - 1] = fd;
		697	}
561	}	698	}
562		699
563	void inline_speed	700	void inline_speed
564	fd_kill (EV_P_ int fd)	701	fd_kill (EV_P_ int fd)
565	{	702	{
…		…
616		753
617	for (fd = 0; fd < anfdmax; ++fd)	754	for (fd = 0; fd < anfdmax; ++fd)
618	if (anfds [fd].events)	755	if (anfds [fd].events)
619	{	756	{
620	anfds [fd].events = 0;	757	anfds [fd].events = 0;
621	fd_change (EV_A_ fd);	758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
622	}	759	}
623	}	760	}
624		761
625	/*****************************************************************************/	762	/*****************************************************************************/
626		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 */
627	void inline_speed	776	void inline_speed
628	upheap (WT *heap, int k)	777	upheap (WT *heap, int k)
629	{	778	{
630	WT w = heap [k];	779	WT w = heap [k];
631		780
632	while (k && heap [k >> 1]->at > w->at)	781	for (;;)
633	{	782	{
		783	int p = ((k - HEAP0 - 1) / 4) + HEAP0;
		784
		785	if (p >= HEAP0 || heap [p]->at <= w->at)
		786	break;
		787
634	heap [k] = heap [k >> 1];	788	heap [k] = heap [p];
635	((W)heap [k])->active = k + 1;	789	ev_active (heap [k]) = k;
636	k >>= 1;	790	k = p;
637	}	791	}
638		792
639	heap [k] = w;	793	heap [k] = w;
640	((W)heap [k])->active = k + 1;	794	ev_active (heap [k]) = k;
641
642	}	795	}
643		796
		797	/* away from the root */
644	void inline_speed	798	void inline_speed
645	downheap (WT *heap, int N, int k)	799	downheap (WT *heap, int N, int k)
646	{	800	{
647	WT w = heap [k];	801	WT w = heap [k];
		802	WT *E = heap + N + HEAP0;
648		803
649	while (k < (N >> 1))	804	for (;;)
650	{	805	{
651	int j = k << 1;	806	ev_tstamp minat;
		807	WT *minpos;
		808	WT *pos = heap + 4 * (k - HEAP0) + HEAP0;
652		809
653	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	810	// find minimum child
		811	if (expect_true (pos +3 < E))
654	++j;	812	{
		813	(minpos = pos + 0), (minat = (*minpos)->at);
		814	if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		815	if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		816	if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		817	}
		818	else
		819	{
		820	if (pos >= E)
		821	break;
655		822
		823	(minpos = pos + 0), (minat = (*minpos)->at);
		824	if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		825	if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		826	if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		827	}
		828
656	if (w->at <= heap [j]->at)	829	if (w->at <= minat)
657	break;	830	break;
658		831
659	heap [k] = heap [j];	832	ev_active (*minpos) = k;
660	((W)heap [k])->active = k + 1;	833	heap [k] = *minpos;
661	k = j;	834
		835	k = minpos - heap;
662	}	836	}
663		837
664	heap [k] = w;	838	heap [k] = w;
		839	ev_active (heap [k]) = k;
		840	}
		841
		842	#else // 4HEAP
		843
		844	#define HEAP0 1
		845
		846	/* towards the root */
		847	void inline_speed
		848	upheap (WT *heap, int k)
		849	{
		850	WT w = heap [k];
		851
		852	for (;;)
		853	{
		854	int p = k >> 1;
		855
		856	/* maybe we could use a dummy element at heap [0]? */
		857	if (!p || heap [p]->at <= w->at)
		858	break;
		859
		860	heap [k] = heap [p];
		861	ev_active (heap [k]) = k;
		862	k = p;
		863	}
		864
		865	heap [k] = w;
		866	ev_active (heap [k]) = k;
		867	}
		868
		869	/* away from the root */
		870	void inline_speed
		871	downheap (WT *heap, int N, int k)
		872	{
		873	WT w = heap [k];
		874
		875	for (;;)
		876	{
		877	int c = k << 1;
		878
		879	if (c > N)
		880	break;
		881
		882	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		883	? 1 : 0;
		884
		885	if (w->at <= heap [c]->at)
		886	break;
		887
		888	heap [k] = heap [c];
665	((W)heap [k])->active = k + 1;	889	((W)heap [k])->active = k;
		890
		891	k = c;
		892	}
		893
		894	heap [k] = w;
		895	ev_active (heap [k]) = k;
666	}	896	}
		897	#endif
667		898
668	void inline_size	899	void inline_size
669	adjustheap (WT *heap, int N, int k)	900	adjustheap (WT *heap, int N, int k)
670	{	901	{
671	upheap (heap, k);	902	upheap (heap, k);
…		…
675	/*****************************************************************************/	906	/*****************************************************************************/
676		907
677	typedef struct	908	typedef struct
678	{	909	{
679	WL head;	910	WL head;
680	sig_atomic_t volatile gotsig;	911	EV_ATOMIC_T gotsig;
681	} ANSIG;	912	} ANSIG;
682		913
683	static ANSIG *signals;	914	static ANSIG *signals;
684	static int signalmax;	915	static int signalmax;
685		916
686	static int sigpipe [2];	917	static EV_ATOMIC_T gotsig;
687	static sig_atomic_t volatile gotsig;
688	static ev_io sigev;
689		918
690	void inline_size	919	void inline_size
691	signals_init (ANSIG *base, int count)	920	signals_init (ANSIG *base, int count)
692	{	921	{
693	while (count--)	922	while (count--)
…		…
697		926
698	++base;	927	++base;
699	}	928	}
700	}	929	}
701		930
702	static void	931	/*****************************************************************************/
703	sighandler (int signum)
704	{
705	#if _WIN32
706	signal (signum, sighandler);
707	#endif
708		932
709	signals [signum - 1].gotsig = 1;
710
711	if (!gotsig)
712	{
713	int old_errno = errno;
714	gotsig = 1;
715	write (sigpipe [1], &signum, 1);
716	errno = old_errno;
717	}
718	}
719
720	void noinline
721	ev_feed_signal_event (EV_P_ int signum)
722	{
723	WL w;
724
725	#if EV_MULTIPLICITY
726	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
727	#endif
728
729	--signum;
730
731	if (signum < 0 || signum >= signalmax)
732	return;
733
734	signals [signum].gotsig = 0;
735
736	for (w = signals [signum].head; w; w = w->next)
737	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
738	}
739
740	static void
741	sigcb (EV_P_ ev_io *iow, int revents)
742	{
743	int signum;
744
745	read (sigpipe [0], &revents, 1);
746	gotsig = 0;
747
748	for (signum = signalmax; signum--; )
749	if (signals [signum].gotsig)
750	ev_feed_signal_event (EV_A_ signum + 1);
751	}
752
753	void inline_size	933	void inline_speed
754	fd_intern (int fd)	934	fd_intern (int fd)
755	{	935	{
756	#ifdef _WIN32	936	#ifdef _WIN32
757	int arg = 1;	937	int arg = 1;
758	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	938	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
761	fcntl (fd, F_SETFL, O_NONBLOCK);	941	fcntl (fd, F_SETFL, O_NONBLOCK);
762	#endif	942	#endif
763	}	943	}
764		944
765	static void noinline	945	static void noinline
766	siginit (EV_P)	946	evpipe_init (EV_P)
767	{	947	{
		948	if (!ev_is_active (&pipeev))
		949	{
		950	#if EV_USE_EVENTFD
		951	if ((evfd = eventfd (0, 0)) >= 0)
		952	{
		953	evpipe [0] = -1;
		954	fd_intern (evfd);
		955	ev_io_set (&pipeev, evfd, EV_READ);
		956	}
		957	else
		958	#endif
		959	{
		960	while (pipe (evpipe))
		961	syserr ("(libev) error creating signal/async pipe");
		962
768	fd_intern (sigpipe [0]);	963	fd_intern (evpipe [0]);
769	fd_intern (sigpipe [1]);	964	fd_intern (evpipe [1]);
		965	ev_io_set (&pipeev, evpipe [0], EV_READ);
		966	}
770		967
771	ev_io_set (&sigev, sigpipe [0], EV_READ);
772	ev_io_start (EV_A_ &sigev);	968	ev_io_start (EV_A_ &pipeev);
773	ev_unref (EV_A); /* child watcher should not keep loop alive */	969	ev_unref (EV_A); /* watcher should not keep loop alive */
		970	}
		971	}
		972
		973	void inline_size
		974	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		975	{
		976	if (!*flag)
		977	{
		978	int old_errno = errno; /* save errno because write might clobber it */
		979
		980	*flag = 1;
		981
		982	#if EV_USE_EVENTFD
		983	if (evfd >= 0)
		984	{
		985	uint64_t counter = 1;
		986	write (evfd, &counter, sizeof (uint64_t));
		987	}
		988	else
		989	#endif
		990	write (evpipe [1], &old_errno, 1);
		991
		992	errno = old_errno;
		993	}
		994	}
		995
		996	static void
		997	pipecb (EV_P_ ev_io *iow, int revents)
		998	{
		999	#if EV_USE_EVENTFD
		1000	if (evfd >= 0)
		1001	{
		1002	uint64_t counter;
		1003	read (evfd, &counter, sizeof (uint64_t));
		1004	}
		1005	else
		1006	#endif
		1007	{
		1008	char dummy;
		1009	read (evpipe [0], &dummy, 1);
		1010	}
		1011
		1012	if (gotsig && ev_is_default_loop (EV_A))
		1013	{
		1014	int signum;
		1015	gotsig = 0;
		1016
		1017	for (signum = signalmax; signum--; )
		1018	if (signals [signum].gotsig)
		1019	ev_feed_signal_event (EV_A_ signum + 1);
		1020	}
		1021
		1022	#if EV_ASYNC_ENABLE
		1023	if (gotasync)
		1024	{
		1025	int i;
		1026	gotasync = 0;
		1027
		1028	for (i = asynccnt; i--; )
		1029	if (asyncs [i]->sent)
		1030	{
		1031	asyncs [i]->sent = 0;
		1032	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1033	}
		1034	}
		1035	#endif
774	}	1036	}
775		1037
776	/*****************************************************************************/	1038	/*****************************************************************************/
777		1039
		1040	static void
		1041	ev_sighandler (int signum)
		1042	{
		1043	#if EV_MULTIPLICITY
		1044	struct ev_loop *loop = &default_loop_struct;
		1045	#endif
		1046
		1047	#if _WIN32
		1048	signal (signum, ev_sighandler);
		1049	#endif
		1050
		1051	signals [signum - 1].gotsig = 1;
		1052	evpipe_write (EV_A_ &gotsig);
		1053	}
		1054
		1055	void noinline
		1056	ev_feed_signal_event (EV_P_ int signum)
		1057	{
		1058	WL w;
		1059
		1060	#if EV_MULTIPLICITY
		1061	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1062	#endif
		1063
		1064	--signum;
		1065
		1066	if (signum < 0 || signum >= signalmax)
		1067	return;
		1068
		1069	signals [signum].gotsig = 0;
		1070
		1071	for (w = signals [signum].head; w; w = w->next)
		1072	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1073	}
		1074
		1075	/*****************************************************************************/
		1076
778	static ev_child *childs [EV_PID_HASHSIZE];	1077	static WL childs [EV_PID_HASHSIZE];
779		1078
780	#ifndef _WIN32	1079	#ifndef _WIN32
781		1080
782	static ev_signal childev;	1081	static ev_signal childev;
783		1082
		1083	#ifndef WIFCONTINUED
		1084	# define WIFCONTINUED(status) 0
		1085	#endif
		1086
784	void inline_speed	1087	void inline_speed
785	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1088	child_reap (EV_P_ int chain, int pid, int status)
786	{	1089	{
787	ev_child *w;	1090	ev_child *w;
		1091	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
788		1092
789	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1093	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1094	{
790	if (w->pid == pid || !w->pid)	1095	if ((w->pid == pid || !w->pid)
		1096	&& (!traced || (w->flags & 1)))
791	{	1097	{
792	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */	1098	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
793	w->rpid = pid;	1099	w->rpid = pid;
794	w->rstatus = status;	1100	w->rstatus = status;
795	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1101	ev_feed_event (EV_A_ (W)w, EV_CHILD);
796	}	1102	}
		1103	}
797	}	1104	}
798		1105
799	#ifndef WCONTINUED	1106	#ifndef WCONTINUED
800	# define WCONTINUED 0	1107	# define WCONTINUED 0
801	#endif	1108	#endif
…		…
810	if (!WCONTINUED	1117	if (!WCONTINUED
811	|| errno != EINVAL	1118	|| errno != EINVAL
812	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))	1119	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
813	return;	1120	return;
814		1121
815	/* make sure we are called again until all childs have been reaped */	1122	/* make sure we are called again until all children have been reaped */
816	/* we need to do it this way so that the callback gets called before we continue */	1123	/* we need to do it this way so that the callback gets called before we continue */
817	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1124	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
818		1125
819	child_reap (EV_A_ sw, pid, pid, status);	1126	child_reap (EV_A_ pid, pid, status);
820	if (EV_PID_HASHSIZE > 1)	1127	if (EV_PID_HASHSIZE > 1)
821	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1128	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
822	}	1129	}
823		1130
824	#endif	1131	#endif
825		1132
826	/*****************************************************************************/	1133	/*****************************************************************************/
…		…
898	}	1205	}
899		1206
900	unsigned int	1207	unsigned int
901	ev_embeddable_backends (void)	1208	ev_embeddable_backends (void)
902	{	1209	{
903	return EVBACKEND_EPOLL	1210	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
904	| EVBACKEND_KQUEUE	1211
905	| EVBACKEND_PORT;	1212	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1213	/* please fix it and tell me how to detect the fix */
		1214	flags &= ~EVBACKEND_EPOLL;
		1215
		1216	return flags;
906	}	1217	}
907		1218
908	unsigned int	1219	unsigned int
909	ev_backend (EV_P)	1220	ev_backend (EV_P)
910	{	1221	{
…		…
913		1224
914	unsigned int	1225	unsigned int
915	ev_loop_count (EV_P)	1226	ev_loop_count (EV_P)
916	{	1227	{
917	return loop_count;	1228	return loop_count;
		1229	}
		1230
		1231	void
		1232	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1233	{
		1234	io_blocktime = interval;
		1235	}
		1236
		1237	void
		1238	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1239	{
		1240	timeout_blocktime = interval;
918	}	1241	}
919		1242
920	static void noinline	1243	static void noinline
921	loop_init (EV_P_ unsigned int flags)	1244	loop_init (EV_P_ unsigned int flags)
922	{	1245	{
…		…
928	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1251	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
929	have_monotonic = 1;	1252	have_monotonic = 1;
930	}	1253	}
931	#endif	1254	#endif
932		1255
933	ev_rt_now = ev_time ();	1256	ev_rt_now = ev_time ();
934	mn_now = get_clock ();	1257	mn_now = get_clock ();
935	now_floor = mn_now;	1258	now_floor = mn_now;
936	rtmn_diff = ev_rt_now - mn_now;	1259	rtmn_diff = ev_rt_now - mn_now;
		1260
		1261	io_blocktime = 0.;
		1262	timeout_blocktime = 0.;
		1263	backend = 0;
		1264	backend_fd = -1;
		1265	gotasync = 0;
		1266	#if EV_USE_INOTIFY
		1267	fs_fd = -2;
		1268	#endif
937		1269
938	/* pid check not overridable via env */	1270	/* pid check not overridable via env */
939	#ifndef _WIN32	1271	#ifndef _WIN32
940	if (flags & EVFLAG_FORKCHECK)	1272	if (flags & EVFLAG_FORKCHECK)
941	curpid = getpid ();	1273	curpid = getpid ();
…		…
944	if (!(flags & EVFLAG_NOENV)	1276	if (!(flags & EVFLAG_NOENV)
945	&& !enable_secure ()	1277	&& !enable_secure ()
946	&& getenv ("LIBEV_FLAGS"))	1278	&& getenv ("LIBEV_FLAGS"))
947	flags = atoi (getenv ("LIBEV_FLAGS"));	1279	flags = atoi (getenv ("LIBEV_FLAGS"));
948		1280
949	if (!(flags & 0x0000ffffUL))	1281	if (!(flags & 0x0000ffffU))
950	flags |= ev_recommended_backends ();	1282	flags |= ev_recommended_backends ();
951
952	backend = 0;
953	backend_fd = -1;
954	#if EV_USE_INOTIFY
955	fs_fd = -2;
956	#endif
957		1283
958	#if EV_USE_PORT	1284	#if EV_USE_PORT
959	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1285	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
960	#endif	1286	#endif
961	#if EV_USE_KQUEUE	1287	#if EV_USE_KQUEUE
…		…
969	#endif	1295	#endif
970	#if EV_USE_SELECT	1296	#if EV_USE_SELECT
971	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1297	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
972	#endif	1298	#endif
973		1299
974	ev_init (&sigev, sigcb);	1300	ev_init (&pipeev, pipecb);
975	ev_set_priority (&sigev, EV_MAXPRI);	1301	ev_set_priority (&pipeev, EV_MAXPRI);
976	}	1302	}
977	}	1303	}
978		1304
979	static void noinline	1305	static void noinline
980	loop_destroy (EV_P)	1306	loop_destroy (EV_P)
981	{	1307	{
982	int i;	1308	int i;
		1309
		1310	if (ev_is_active (&pipeev))
		1311	{
		1312	ev_ref (EV_A); /* signal watcher */
		1313	ev_io_stop (EV_A_ &pipeev);
		1314
		1315	#if EV_USE_EVENTFD
		1316	if (evfd >= 0)
		1317	close (evfd);
		1318	#endif
		1319
		1320	if (evpipe [0] >= 0)
		1321	{
		1322	close (evpipe [0]);
		1323	close (evpipe [1]);
		1324	}
		1325	}
983		1326
984	#if EV_USE_INOTIFY	1327	#if EV_USE_INOTIFY
985	if (fs_fd >= 0)	1328	if (fs_fd >= 0)
986	close (fs_fd);	1329	close (fs_fd);
987	#endif	1330	#endif
…		…
1010	array_free (pending, [i]);	1353	array_free (pending, [i]);
1011	#if EV_IDLE_ENABLE	1354	#if EV_IDLE_ENABLE
1012	array_free (idle, [i]);	1355	array_free (idle, [i]);
1013	#endif	1356	#endif
1014	}	1357	}
		1358
		1359	ev_free (anfds); anfdmax = 0;
1015		1360
1016	/* have to use the microsoft-never-gets-it-right macro */	1361	/* have to use the microsoft-never-gets-it-right macro */
1017	array_free (fdchange, EMPTY);	1362	array_free (fdchange, EMPTY);
1018	array_free (timer, EMPTY);	1363	array_free (timer, EMPTY);
1019	#if EV_PERIODIC_ENABLE	1364	#if EV_PERIODIC_ENABLE
1020	array_free (periodic, EMPTY);	1365	array_free (periodic, EMPTY);
1021	#endif	1366	#endif
		1367	#if EV_FORK_ENABLE
		1368	array_free (fork, EMPTY);
		1369	#endif
1022	array_free (prepare, EMPTY);	1370	array_free (prepare, EMPTY);
1023	array_free (check, EMPTY);	1371	array_free (check, EMPTY);
		1372	#if EV_ASYNC_ENABLE
		1373	array_free (async, EMPTY);
		1374	#endif
1024		1375
1025	backend = 0;	1376	backend = 0;
1026	}	1377	}
1027		1378
		1379	#if EV_USE_INOTIFY
1028	void inline_size infy_fork (EV_P);	1380	void inline_size infy_fork (EV_P);
		1381	#endif
1029		1382
1030	void inline_size	1383	void inline_size
1031	loop_fork (EV_P)	1384	loop_fork (EV_P)
1032	{	1385	{
1033	#if EV_USE_PORT	1386	#if EV_USE_PORT
…		…
1041	#endif	1394	#endif
1042	#if EV_USE_INOTIFY	1395	#if EV_USE_INOTIFY
1043	infy_fork (EV_A);	1396	infy_fork (EV_A);
1044	#endif	1397	#endif
1045		1398
1046	if (ev_is_active (&sigev))	1399	if (ev_is_active (&pipeev))
1047	{	1400	{
1048	/* default loop */	1401	/* this "locks" the handlers against writing to the pipe */
		1402	/* while we modify the fd vars */
		1403	gotsig = 1;
		1404	#if EV_ASYNC_ENABLE
		1405	gotasync = 1;
		1406	#endif
1049		1407
1050	ev_ref (EV_A);	1408	ev_ref (EV_A);
1051	ev_io_stop (EV_A_ &sigev);	1409	ev_io_stop (EV_A_ &pipeev);
		1410
		1411	#if EV_USE_EVENTFD
		1412	if (evfd >= 0)
		1413	close (evfd);
		1414	#endif
		1415
		1416	if (evpipe [0] >= 0)
		1417	{
1052	close (sigpipe [0]);	1418	close (evpipe [0]);
1053	close (sigpipe [1]);	1419	close (evpipe [1]);
		1420	}
1054		1421
1055	while (pipe (sigpipe))
1056	syserr ("(libev) error creating pipe");
1057
1058	siginit (EV_A);	1422	evpipe_init (EV_A);
		1423	/* now iterate over everything, in case we missed something */
		1424	pipecb (EV_A_ &pipeev, EV_READ);
1059	}	1425	}
1060		1426
1061	postfork = 0;	1427	postfork = 0;
1062	}	1428	}
1063		1429
…		…
1085	}	1451	}
1086		1452
1087	void	1453	void
1088	ev_loop_fork (EV_P)	1454	ev_loop_fork (EV_P)
1089	{	1455	{
1090	postfork = 1;	1456	postfork = 1; /* must be in line with ev_default_fork */
1091	}	1457	}
1092
1093	#endif	1458	#endif
1094		1459
1095	#if EV_MULTIPLICITY	1460	#if EV_MULTIPLICITY
1096	struct ev_loop *	1461	struct ev_loop *
1097	ev_default_loop_init (unsigned int flags)	1462	ev_default_loop_init (unsigned int flags)
1098	#else	1463	#else
1099	int	1464	int
1100	ev_default_loop (unsigned int flags)	1465	ev_default_loop (unsigned int flags)
1101	#endif	1466	#endif
1102	{	1467	{
1103	if (sigpipe [0] == sigpipe [1])
1104	if (pipe (sigpipe))
1105	return 0;
1106
1107	if (!ev_default_loop_ptr)	1468	if (!ev_default_loop_ptr)
1108	{	1469	{
1109	#if EV_MULTIPLICITY	1470	#if EV_MULTIPLICITY
1110	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1471	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1111	#else	1472	#else
…		…
1114		1475
1115	loop_init (EV_A_ flags);	1476	loop_init (EV_A_ flags);
1116		1477
1117	if (ev_backend (EV_A))	1478	if (ev_backend (EV_A))
1118	{	1479	{
1119	siginit (EV_A);
1120
1121	#ifndef _WIN32	1480	#ifndef _WIN32
1122	ev_signal_init (&childev, childcb, SIGCHLD);	1481	ev_signal_init (&childev, childcb, SIGCHLD);
1123	ev_set_priority (&childev, EV_MAXPRI);	1482	ev_set_priority (&childev, EV_MAXPRI);
1124	ev_signal_start (EV_A_ &childev);	1483	ev_signal_start (EV_A_ &childev);
1125	ev_unref (EV_A); /* child watcher should not keep loop alive */	1484	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1142	#ifndef _WIN32	1501	#ifndef _WIN32
1143	ev_ref (EV_A); /* child watcher */	1502	ev_ref (EV_A); /* child watcher */
1144	ev_signal_stop (EV_A_ &childev);	1503	ev_signal_stop (EV_A_ &childev);
1145	#endif	1504	#endif
1146		1505
1147	ev_ref (EV_A); /* signal watcher */
1148	ev_io_stop (EV_A_ &sigev);
1149
1150	close (sigpipe [0]); sigpipe [0] = 0;
1151	close (sigpipe [1]); sigpipe [1] = 0;
1152
1153	loop_destroy (EV_A);	1506	loop_destroy (EV_A);
1154	}	1507	}
1155		1508
1156	void	1509	void
1157	ev_default_fork (void)	1510	ev_default_fork (void)
…		…
1159	#if EV_MULTIPLICITY	1512	#if EV_MULTIPLICITY
1160	struct ev_loop *loop = ev_default_loop_ptr;	1513	struct ev_loop *loop = ev_default_loop_ptr;
1161	#endif	1514	#endif
1162		1515
1163	if (backend)	1516	if (backend)
1164	postfork = 1;	1517	postfork = 1; /* must be in line with ev_loop_fork */
1165	}	1518	}
1166		1519
1167	/*****************************************************************************/	1520	/*****************************************************************************/
1168		1521
1169	void	1522	void
…		…
1189	p->w->pending = 0;	1542	p->w->pending = 0;
1190	EV_CB_INVOKE (p->w, p->events);	1543	EV_CB_INVOKE (p->w, p->events);
1191	}	1544	}
1192	}	1545	}
1193	}	1546	}
1194
1195	void inline_size
1196	timers_reify (EV_P)
1197	{
1198	while (timercnt && ((WT)timers [0])->at <= mn_now)
1199	{
1200	ev_timer *w = timers [0];
1201
1202	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1203
1204	/* first reschedule or stop timer */
1205	if (w->repeat)
1206	{
1207	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1208
1209	((WT)w)->at += w->repeat;
1210	if (((WT)w)->at < mn_now)
1211	((WT)w)->at = mn_now;
1212
1213	downheap ((WT *)timers, timercnt, 0);
1214	}
1215	else
1216	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1217
1218	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1219	}
1220	}
1221
1222	#if EV_PERIODIC_ENABLE
1223	void inline_size
1224	periodics_reify (EV_P)
1225	{
1226	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1227	{
1228	ev_periodic *w = periodics [0];
1229
1230	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1231
1232	/* first reschedule or stop timer */
1233	if (w->reschedule_cb)
1234	{
1235	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1236	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1237	downheap ((WT *)periodics, periodiccnt, 0);
1238	}
1239	else if (w->interval)
1240	{
1241	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1242	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1243	downheap ((WT *)periodics, periodiccnt, 0);
1244	}
1245	else
1246	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1247
1248	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1249	}
1250	}
1251
1252	static void noinline
1253	periodics_reschedule (EV_P)
1254	{
1255	int i;
1256
1257	/* adjust periodics after time jump */
1258	for (i = 0; i < periodiccnt; ++i)
1259	{
1260	ev_periodic *w = periodics [i];
1261
1262	if (w->reschedule_cb)
1263	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1264	else if (w->interval)
1265	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1266	}
1267
1268	/* now rebuild the heap */
1269	for (i = periodiccnt >> 1; i--; )
1270	downheap ((WT *)periodics, periodiccnt, i);
1271	}
1272	#endif
1273		1547
1274	#if EV_IDLE_ENABLE	1548	#if EV_IDLE_ENABLE
1275	void inline_size	1549	void inline_size
1276	idle_reify (EV_P)	1550	idle_reify (EV_P)
1277	{	1551	{
…		…
1292	}	1566	}
1293	}	1567	}
1294	}	1568	}
1295	#endif	1569	#endif
1296		1570
1297	int inline_size	1571	void inline_size
1298	time_update_monotonic (EV_P)	1572	timers_reify (EV_P)
1299	{	1573	{
		1574	while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
		1575	{
		1576	ev_timer *w = (ev_timer *)timers [HEAP0];
		1577
		1578	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1579
		1580	/* first reschedule or stop timer */
		1581	if (w->repeat)
		1582	{
		1583	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1584
		1585	ev_at (w) += w->repeat;
		1586	if (ev_at (w) < mn_now)
		1587	ev_at (w) = mn_now;
		1588
		1589	downheap (timers, timercnt, HEAP0);
		1590	}
		1591	else
		1592	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1593
		1594	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1595	}
		1596	}
		1597
		1598	#if EV_PERIODIC_ENABLE
		1599	void inline_size
		1600	periodics_reify (EV_P)
		1601	{
		1602	while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
		1603	{
		1604	ev_periodic *w = (ev_periodic *)periodics [HEAP0];
		1605
		1606	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1607
		1608	/* first reschedule or stop timer */
		1609	if (w->reschedule_cb)
		1610	{
		1611	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1612	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1613	downheap (periodics, periodiccnt, 1);
		1614	}
		1615	else if (w->interval)
		1616	{
		1617	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1618	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1619	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1620	downheap (periodics, periodiccnt, HEAP0);
		1621	}
		1622	else
		1623	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1624
		1625	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1626	}
		1627	}
		1628
		1629	static void noinline
		1630	periodics_reschedule (EV_P)
		1631	{
		1632	int i;
		1633
		1634	/* adjust periodics after time jump */
		1635	for (i = 1; i <= periodiccnt; ++i)
		1636	{
		1637	ev_periodic *w = (ev_periodic *)periodics [i];
		1638
		1639	if (w->reschedule_cb)
		1640	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1641	else if (w->interval)
		1642	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1643	}
		1644
		1645	/* now rebuild the heap */
		1646	for (i = periodiccnt >> 1; --i; )
		1647	downheap (periodics, periodiccnt, i + HEAP0);
		1648	}
		1649	#endif
		1650
		1651	void inline_speed
		1652	time_update (EV_P_ ev_tstamp max_block)
		1653	{
		1654	int i;
		1655
		1656	#if EV_USE_MONOTONIC
		1657	if (expect_true (have_monotonic))
		1658	{
		1659	ev_tstamp odiff = rtmn_diff;
		1660
1300	mn_now = get_clock ();	1661	mn_now = get_clock ();
1301		1662
		1663	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1664	/* interpolate in the meantime */
1302	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1665	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1303	{	1666	{
1304	ev_rt_now = rtmn_diff + mn_now;	1667	ev_rt_now = rtmn_diff + mn_now;
1305	return 0;	1668	return;
1306	}	1669	}
1307	else	1670
1308	{
1309	now_floor = mn_now;	1671	now_floor = mn_now;
1310	ev_rt_now = ev_time ();	1672	ev_rt_now = ev_time ();
1311	return 1;
1312	}
1313	}
1314		1673
1315	void inline_size	1674	/* loop a few times, before making important decisions.
1316	time_update (EV_P)	1675	* on the choice of "4": one iteration isn't enough,
1317	{	1676	* in case we get preempted during the calls to
1318	int i;	1677	* ev_time and get_clock. a second call is almost guaranteed
1319		1678	* to succeed in that case, though. and looping a few more times
1320	#if EV_USE_MONOTONIC	1679	* doesn't hurt either as we only do this on time-jumps or
1321	if (expect_true (have_monotonic))	1680	* in the unlikely event of having been preempted here.
1322	{	1681	*/
1323	if (time_update_monotonic (EV_A))	1682	for (i = 4; --i; )
1324	{	1683	{
1325	ev_tstamp odiff = rtmn_diff;
1326
1327	/* loop a few times, before making important decisions.
1328	* on the choice of "4": one iteration isn't enough,
1329	* in case we get preempted during the calls to
1330	* ev_time and get_clock. a second call is almost guaranteed
1331	* to succeed in that case, though. and looping a few more times
1332	* doesn't hurt either as we only do this on time-jumps or
1333	* in the unlikely event of having been preempted here.
1334	*/
1335	for (i = 4; --i; )
1336	{
1337	rtmn_diff = ev_rt_now - mn_now;	1684	rtmn_diff = ev_rt_now - mn_now;
1338		1685
1339	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1686	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1340	return; /* all is well */	1687	return; /* all is well */
1341		1688
1342	ev_rt_now = ev_time ();	1689	ev_rt_now = ev_time ();
1343	mn_now = get_clock ();	1690	mn_now = get_clock ();
1344	now_floor = mn_now;	1691	now_floor = mn_now;
1345	}	1692	}
1346		1693
1347	# if EV_PERIODIC_ENABLE	1694	# if EV_PERIODIC_ENABLE
1348	periodics_reschedule (EV_A);	1695	periodics_reschedule (EV_A);
1349	# endif	1696	# endif
1350	/* no timer adjustment, as the monotonic clock doesn't jump */	1697	/* no timer adjustment, as the monotonic clock doesn't jump */
1351	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1698	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1352	}
1353	}	1699	}
1354	else	1700	else
1355	#endif	1701	#endif
1356	{	1702	{
1357	ev_rt_now = ev_time ();	1703	ev_rt_now = ev_time ();
1358		1704
1359	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1705	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1360	{	1706	{
1361	#if EV_PERIODIC_ENABLE	1707	#if EV_PERIODIC_ENABLE
1362	periodics_reschedule (EV_A);	1708	periodics_reschedule (EV_A);
1363	#endif	1709	#endif
1364
1365	/* adjust timers. this is easy, as the offset is the same for all of them */	1710	/* adjust timers. this is easy, as the offset is the same for all of them */
1366	for (i = 0; i < timercnt; ++i)	1711	for (i = 1; i <= timercnt; ++i)
1367	((WT)timers [i])->at += ev_rt_now - mn_now;	1712	ev_at (timers [i]) += ev_rt_now - mn_now;
1368	}	1713	}
1369		1714
1370	mn_now = ev_rt_now;	1715	mn_now = ev_rt_now;
1371	}	1716	}
1372	}	1717	}
…		…
1386	static int loop_done;	1731	static int loop_done;
1387		1732
1388	void	1733	void
1389	ev_loop (EV_P_ int flags)	1734	ev_loop (EV_P_ int flags)
1390	{	1735	{
1391	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	1736	loop_done = EVUNLOOP_CANCEL;
1392	? EVUNLOOP_ONE
1393	: EVUNLOOP_CANCEL;
1394		1737
1395	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1738	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1396		1739
1397	do	1740	do
1398	{	1741	{
…		…
1413	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	1756	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1414	call_pending (EV_A);	1757	call_pending (EV_A);
1415	}	1758	}
1416	#endif	1759	#endif
1417		1760
1418	/* queue check watchers (and execute them) */	1761	/* queue prepare watchers (and execute them) */
1419	if (expect_false (preparecnt))	1762	if (expect_false (preparecnt))
1420	{	1763	{
1421	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1764	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1422	call_pending (EV_A);	1765	call_pending (EV_A);
1423	}	1766	}
…		…
1432	/* update fd-related kernel structures */	1775	/* update fd-related kernel structures */
1433	fd_reify (EV_A);	1776	fd_reify (EV_A);
1434		1777
1435	/* calculate blocking time */	1778	/* calculate blocking time */
1436	{	1779	{
1437	ev_tstamp block;	1780	ev_tstamp waittime = 0.;
		1781	ev_tstamp sleeptime = 0.;
1438		1782
1439	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))	1783	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1440	block = 0.; /* do not block at all */
1441	else
1442	{	1784	{
1443	/* update time to cancel out callback processing overhead */	1785	/* update time to cancel out callback processing overhead */
1444	#if EV_USE_MONOTONIC
1445	if (expect_true (have_monotonic))
1446	time_update_monotonic (EV_A);	1786	time_update (EV_A_ 1e100);
1447	else
1448	#endif
1449	{
1450	ev_rt_now = ev_time ();
1451	mn_now = ev_rt_now;
1452	}
1453		1787
1454	block = MAX_BLOCKTIME;	1788	waittime = MAX_BLOCKTIME;
1455		1789
1456	if (timercnt)	1790	if (timercnt)
1457	{	1791	{
1458	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1792	ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
1459	if (block > to) block = to;	1793	if (waittime > to) waittime = to;
1460	}	1794	}
1461		1795
1462	#if EV_PERIODIC_ENABLE	1796	#if EV_PERIODIC_ENABLE
1463	if (periodiccnt)	1797	if (periodiccnt)
1464	{	1798	{
1465	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1799	ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1466	if (block > to) block = to;	1800	if (waittime > to) waittime = to;
1467	}	1801	}
1468	#endif	1802	#endif
1469		1803
1470	if (expect_false (block < 0.)) block = 0.;	1804	if (expect_false (waittime < timeout_blocktime))
		1805	waittime = timeout_blocktime;
		1806
		1807	sleeptime = waittime - backend_fudge;
		1808
		1809	if (expect_true (sleeptime > io_blocktime))
		1810	sleeptime = io_blocktime;
		1811
		1812	if (sleeptime)
		1813	{
		1814	ev_sleep (sleeptime);
		1815	waittime -= sleeptime;
		1816	}
1471	}	1817	}
1472		1818
1473	++loop_count;	1819	++loop_count;
1474	backend_poll (EV_A_ block);	1820	backend_poll (EV_A_ waittime);
		1821
		1822	/* update ev_rt_now, do magic */
		1823	time_update (EV_A_ waittime + sleeptime);
1475	}	1824	}
1476
1477	/* update ev_rt_now, do magic */
1478	time_update (EV_A);
1479		1825
1480	/* queue pending timers and reschedule them */	1826	/* queue pending timers and reschedule them */
1481	timers_reify (EV_A); /* relative timers called last */	1827	timers_reify (EV_A); /* relative timers called last */
1482	#if EV_PERIODIC_ENABLE	1828	#if EV_PERIODIC_ENABLE
1483	periodics_reify (EV_A); /* absolute timers called first */	1829	periodics_reify (EV_A); /* absolute timers called first */
…		…
1491	/* queue check watchers, to be executed first */	1837	/* queue check watchers, to be executed first */
1492	if (expect_false (checkcnt))	1838	if (expect_false (checkcnt))
1493	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1839	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1494		1840
1495	call_pending (EV_A);	1841	call_pending (EV_A);
1496
1497	}	1842	}
1498	while (expect_true (activecnt && !loop_done));	1843	while (expect_true (
		1844	activecnt
		1845	&& !loop_done
		1846	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1847	));
1499		1848
1500	if (loop_done == EVUNLOOP_ONE)	1849	if (loop_done == EVUNLOOP_ONE)
1501	loop_done = EVUNLOOP_CANCEL;	1850	loop_done = EVUNLOOP_CANCEL;
1502	}	1851	}
1503		1852
…		…
1545	ev_clear_pending (EV_P_ void *w)	1894	ev_clear_pending (EV_P_ void *w)
1546	{	1895	{
1547	W w_ = (W)w;	1896	W w_ = (W)w;
1548	int pending = w_->pending;	1897	int pending = w_->pending;
1549		1898
1550	if (!pending)	1899	if (expect_true (pending))
		1900	{
		1901	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1902	w_->pending = 0;
		1903	p->w = 0;
		1904	return p->events;
		1905	}
		1906	else
1551	return 0;	1907	return 0;
1552
1553	w_->pending = 0;
1554	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1555	p->w = 0;
1556
1557	return p->events;
1558	}	1908	}
1559		1909
1560	void inline_size	1910	void inline_size
1561	pri_adjust (EV_P_ W w)	1911	pri_adjust (EV_P_ W w)
1562	{	1912	{
…		…
1581	w->active = 0;	1931	w->active = 0;
1582	}	1932	}
1583		1933
1584	/*****************************************************************************/	1934	/*****************************************************************************/
1585		1935
1586	void	1936	void noinline
1587	ev_io_start (EV_P_ ev_io *w)	1937	ev_io_start (EV_P_ ev_io *w)
1588	{	1938	{
1589	int fd = w->fd;	1939	int fd = w->fd;
1590		1940
1591	if (expect_false (ev_is_active (w)))	1941	if (expect_false (ev_is_active (w)))
…		…
1593		1943
1594	assert (("ev_io_start called with negative fd", fd >= 0));	1944	assert (("ev_io_start called with negative fd", fd >= 0));
1595		1945
1596	ev_start (EV_A_ (W)w, 1);	1946	ev_start (EV_A_ (W)w, 1);
1597	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1947	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1598	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1948	wlist_add (&anfds[fd].head, (WL)w);
1599		1949
1600	fd_change (EV_A_ fd);	1950	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1951	w->events &= ~EV_IOFDSET;
1601	}	1952	}
1602		1953
1603	void	1954	void noinline
1604	ev_io_stop (EV_P_ ev_io *w)	1955	ev_io_stop (EV_P_ ev_io *w)
1605	{	1956	{
1606	clear_pending (EV_A_ (W)w);	1957	clear_pending (EV_A_ (W)w);
1607	if (expect_false (!ev_is_active (w)))	1958	if (expect_false (!ev_is_active (w)))
1608	return;	1959	return;
1609		1960
1610	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1961	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1611		1962
1612	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1963	wlist_del (&anfds[w->fd].head, (WL)w);
1613	ev_stop (EV_A_ (W)w);	1964	ev_stop (EV_A_ (W)w);
1614		1965
1615	fd_change (EV_A_ w->fd);	1966	fd_change (EV_A_ w->fd, 1);
1616	}	1967	}
1617		1968
1618	void	1969	void noinline
1619	ev_timer_start (EV_P_ ev_timer *w)	1970	ev_timer_start (EV_P_ ev_timer *w)
1620	{	1971	{
1621	if (expect_false (ev_is_active (w)))	1972	if (expect_false (ev_is_active (w)))
1622	return;	1973	return;
1623		1974
1624	((WT)w)->at += mn_now;	1975	ev_at (w) += mn_now;
1625		1976
1626	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1977	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1627		1978
1628	ev_start (EV_A_ (W)w, ++timercnt);	1979	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1629	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1980	array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
1630	timers [timercnt - 1] = w;	1981	timers [ev_active (w)] = (WT)w;
1631	upheap ((WT *)timers, timercnt - 1);	1982	upheap (timers, ev_active (w));
1632		1983
1633	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/	1984	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1634	}	1985	}
1635		1986
1636	void	1987	void noinline
1637	ev_timer_stop (EV_P_ ev_timer *w)	1988	ev_timer_stop (EV_P_ ev_timer *w)
1638	{	1989	{
1639	clear_pending (EV_A_ (W)w);	1990	clear_pending (EV_A_ (W)w);
1640	if (expect_false (!ev_is_active (w)))	1991	if (expect_false (!ev_is_active (w)))
1641	return;	1992	return;
1642		1993
1643	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1644
1645	{	1994	{
1646	int active = ((W)w)->active;	1995	int active = ev_active (w);
1647		1996
		1997	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1998
1648	if (expect_true (--active < --timercnt))	1999	if (expect_true (active < timercnt + HEAP0 - 1))
1649	{	2000	{
1650	timers [active] = timers [timercnt];	2001	timers [active] = timers [timercnt + HEAP0 - 1];
1651	adjustheap ((WT *)timers, timercnt, active);	2002	adjustheap (timers, timercnt, active);
1652	}	2003	}
		2004
		2005	--timercnt;
1653	}	2006	}
1654		2007
1655	((WT)w)->at -= mn_now;	2008	ev_at (w) -= mn_now;
1656		2009
1657	ev_stop (EV_A_ (W)w);	2010	ev_stop (EV_A_ (W)w);
1658	}	2011	}
1659		2012
1660	void	2013	void noinline
1661	ev_timer_again (EV_P_ ev_timer *w)	2014	ev_timer_again (EV_P_ ev_timer *w)
1662	{	2015	{
1663	if (ev_is_active (w))	2016	if (ev_is_active (w))
1664	{	2017	{
1665	if (w->repeat)	2018	if (w->repeat)
1666	{	2019	{
1667	((WT)w)->at = mn_now + w->repeat;	2020	ev_at (w) = mn_now + w->repeat;
1668	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2021	adjustheap (timers, timercnt, ev_active (w));
1669	}	2022	}
1670	else	2023	else
1671	ev_timer_stop (EV_A_ w);	2024	ev_timer_stop (EV_A_ w);
1672	}	2025	}
1673	else if (w->repeat)	2026	else if (w->repeat)
1674	{	2027	{
1675	w->at = w->repeat;	2028	ev_at (w) = w->repeat;
1676	ev_timer_start (EV_A_ w);	2029	ev_timer_start (EV_A_ w);
1677	}	2030	}
1678	}	2031	}
1679		2032
1680	#if EV_PERIODIC_ENABLE	2033	#if EV_PERIODIC_ENABLE
1681	void	2034	void noinline
1682	ev_periodic_start (EV_P_ ev_periodic *w)	2035	ev_periodic_start (EV_P_ ev_periodic *w)
1683	{	2036	{
1684	if (expect_false (ev_is_active (w)))	2037	if (expect_false (ev_is_active (w)))
1685	return;	2038	return;
1686		2039
1687	if (w->reschedule_cb)	2040	if (w->reschedule_cb)
1688	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2041	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1689	else if (w->interval)	2042	else if (w->interval)
1690	{	2043	{
1691	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2044	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1692	/* this formula differs from the one in periodic_reify because we do not always round up */	2045	/* this formula differs from the one in periodic_reify because we do not always round up */
1693	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2046	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1694	}	2047	}
		2048	else
		2049	ev_at (w) = w->offset;
1695		2050
1696	ev_start (EV_A_ (W)w, ++periodiccnt);	2051	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1697	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2052	array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
1698	periodics [periodiccnt - 1] = w;	2053	periodics [ev_active (w)] = (WT)w;
1699	upheap ((WT *)periodics, periodiccnt - 1);	2054	upheap (periodics, ev_active (w));
1700		2055
1701	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	2056	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1702	}	2057	}
1703		2058
1704	void	2059	void noinline
1705	ev_periodic_stop (EV_P_ ev_periodic *w)	2060	ev_periodic_stop (EV_P_ ev_periodic *w)
1706	{	2061	{
1707	clear_pending (EV_A_ (W)w);	2062	clear_pending (EV_A_ (W)w);
1708	if (expect_false (!ev_is_active (w)))	2063	if (expect_false (!ev_is_active (w)))
1709	return;	2064	return;
1710		2065
1711	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1712
1713	{	2066	{
1714	int active = ((W)w)->active;	2067	int active = ev_active (w);
1715		2068
		2069	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		2070
1716	if (expect_true (--active < --periodiccnt))	2071	if (expect_true (active < periodiccnt + HEAP0 - 1))
1717	{	2072	{
1718	periodics [active] = periodics [periodiccnt];	2073	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1719	adjustheap ((WT *)periodics, periodiccnt, active);	2074	adjustheap (periodics, periodiccnt, active);
1720	}	2075	}
		2076
		2077	--periodiccnt;
1721	}	2078	}
1722		2079
1723	ev_stop (EV_A_ (W)w);	2080	ev_stop (EV_A_ (W)w);
1724	}	2081	}
1725		2082
1726	void	2083	void noinline
1727	ev_periodic_again (EV_P_ ev_periodic *w)	2084	ev_periodic_again (EV_P_ ev_periodic *w)
1728	{	2085	{
1729	/* TODO: use adjustheap and recalculation */	2086	/* TODO: use adjustheap and recalculation */
1730	ev_periodic_stop (EV_A_ w);	2087	ev_periodic_stop (EV_A_ w);
1731	ev_periodic_start (EV_A_ w);	2088	ev_periodic_start (EV_A_ w);
…		…
1734		2091
1735	#ifndef SA_RESTART	2092	#ifndef SA_RESTART
1736	# define SA_RESTART 0	2093	# define SA_RESTART 0
1737	#endif	2094	#endif
1738		2095
1739	void	2096	void noinline
1740	ev_signal_start (EV_P_ ev_signal *w)	2097	ev_signal_start (EV_P_ ev_signal *w)
1741	{	2098	{
1742	#if EV_MULTIPLICITY	2099	#if EV_MULTIPLICITY
1743	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2100	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1744	#endif	2101	#endif
1745	if (expect_false (ev_is_active (w)))	2102	if (expect_false (ev_is_active (w)))
1746	return;	2103	return;
1747		2104
1748	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2105	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1749		2106
		2107	evpipe_init (EV_A);
		2108
		2109	{
		2110	#ifndef _WIN32
		2111	sigset_t full, prev;
		2112	sigfillset (&full);
		2113	sigprocmask (SIG_SETMASK, &full, &prev);
		2114	#endif
		2115
		2116	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2117
		2118	#ifndef _WIN32
		2119	sigprocmask (SIG_SETMASK, &prev, 0);
		2120	#endif
		2121	}
		2122
1750	ev_start (EV_A_ (W)w, 1);	2123	ev_start (EV_A_ (W)w, 1);
1751	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1752	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2124	wlist_add (&signals [w->signum - 1].head, (WL)w);
1753		2125
1754	if (!((WL)w)->next)	2126	if (!((WL)w)->next)
1755	{	2127	{
1756	#if _WIN32	2128	#if _WIN32
1757	signal (w->signum, sighandler);	2129	signal (w->signum, ev_sighandler);
1758	#else	2130	#else
1759	struct sigaction sa;	2131	struct sigaction sa;
1760	sa.sa_handler = sighandler;	2132	sa.sa_handler = ev_sighandler;
1761	sigfillset (&sa.sa_mask);	2133	sigfillset (&sa.sa_mask);
1762	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2134	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1763	sigaction (w->signum, &sa, 0);	2135	sigaction (w->signum, &sa, 0);
1764	#endif	2136	#endif
1765	}	2137	}
1766	}	2138	}
1767		2139
1768	void	2140	void noinline
1769	ev_signal_stop (EV_P_ ev_signal *w)	2141	ev_signal_stop (EV_P_ ev_signal *w)
1770	{	2142	{
1771	clear_pending (EV_A_ (W)w);	2143	clear_pending (EV_A_ (W)w);
1772	if (expect_false (!ev_is_active (w)))	2144	if (expect_false (!ev_is_active (w)))
1773	return;	2145	return;
1774		2146
1775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2147	wlist_del (&signals [w->signum - 1].head, (WL)w);
1776	ev_stop (EV_A_ (W)w);	2148	ev_stop (EV_A_ (W)w);
1777		2149
1778	if (!signals [w->signum - 1].head)	2150	if (!signals [w->signum - 1].head)
1779	signal (w->signum, SIG_DFL);	2151	signal (w->signum, SIG_DFL);
1780	}	2152	}
…		…
1787	#endif	2159	#endif
1788	if (expect_false (ev_is_active (w)))	2160	if (expect_false (ev_is_active (w)))
1789	return;	2161	return;
1790		2162
1791	ev_start (EV_A_ (W)w, 1);	2163	ev_start (EV_A_ (W)w, 1);
1792	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2164	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1793	}	2165	}
1794		2166
1795	void	2167	void
1796	ev_child_stop (EV_P_ ev_child *w)	2168	ev_child_stop (EV_P_ ev_child *w)
1797	{	2169	{
1798	clear_pending (EV_A_ (W)w);	2170	clear_pending (EV_A_ (W)w);
1799	if (expect_false (!ev_is_active (w)))	2171	if (expect_false (!ev_is_active (w)))
1800	return;	2172	return;
1801		2173
1802	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2174	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1803	ev_stop (EV_A_ (W)w);	2175	ev_stop (EV_A_ (W)w);
1804	}	2176	}
1805		2177
1806	#if EV_STAT_ENABLE	2178	#if EV_STAT_ENABLE
1807		2179
…		…
1826	if (w->wd < 0)	2198	if (w->wd < 0)
1827	{	2199	{
1828	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2200	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1829		2201
1830	/* monitor some parent directory for speedup hints */	2202	/* monitor some parent directory for speedup hints */
		2203	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2204	/* but an efficiency issue only */
1831	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2205	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1832	{	2206	{
1833	char path [4096];	2207	char path [4096];
1834	strcpy (path, w->path);	2208	strcpy (path, w->path);
1835		2209
…		…
2080	clear_pending (EV_A_ (W)w);	2454	clear_pending (EV_A_ (W)w);
2081	if (expect_false (!ev_is_active (w)))	2455	if (expect_false (!ev_is_active (w)))
2082	return;	2456	return;
2083		2457
2084	{	2458	{
2085	int active = ((W)w)->active;	2459	int active = ev_active (w);
2086		2460
2087	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2461	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2088	((W)idles [ABSPRI (w)][active - 1])->active = active;	2462	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2089		2463
2090	ev_stop (EV_A_ (W)w);	2464	ev_stop (EV_A_ (W)w);
2091	--idleall;	2465	--idleall;
2092	}	2466	}
2093	}	2467	}
…		…
2110	clear_pending (EV_A_ (W)w);	2484	clear_pending (EV_A_ (W)w);
2111	if (expect_false (!ev_is_active (w)))	2485	if (expect_false (!ev_is_active (w)))
2112	return;	2486	return;
2113		2487
2114	{	2488	{
2115	int active = ((W)w)->active;	2489	int active = ev_active (w);
		2490
2116	prepares [active - 1] = prepares [--preparecnt];	2491	prepares [active - 1] = prepares [--preparecnt];
2117	((W)prepares [active - 1])->active = active;	2492	ev_active (prepares [active - 1]) = active;
2118	}	2493	}
2119		2494
2120	ev_stop (EV_A_ (W)w);	2495	ev_stop (EV_A_ (W)w);
2121	}	2496	}
2122		2497
…		…
2137	clear_pending (EV_A_ (W)w);	2512	clear_pending (EV_A_ (W)w);
2138	if (expect_false (!ev_is_active (w)))	2513	if (expect_false (!ev_is_active (w)))
2139	return;	2514	return;
2140		2515
2141	{	2516	{
2142	int active = ((W)w)->active;	2517	int active = ev_active (w);
		2518
2143	checks [active - 1] = checks [--checkcnt];	2519	checks [active - 1] = checks [--checkcnt];
2144	((W)checks [active - 1])->active = active;	2520	ev_active (checks [active - 1]) = active;
2145	}	2521	}
2146		2522
2147	ev_stop (EV_A_ (W)w);	2523	ev_stop (EV_A_ (W)w);
2148	}	2524	}
2149		2525
2150	#if EV_EMBED_ENABLE	2526	#if EV_EMBED_ENABLE
2151	void noinline	2527	void noinline
2152	ev_embed_sweep (EV_P_ ev_embed *w)	2528	ev_embed_sweep (EV_P_ ev_embed *w)
2153	{	2529	{
2154	ev_loop (w->loop, EVLOOP_NONBLOCK);	2530	ev_loop (w->other, EVLOOP_NONBLOCK);
2155	}	2531	}
2156		2532
2157	static void	2533	static void
2158	embed_cb (EV_P_ ev_io *io, int revents)	2534	embed_io_cb (EV_P_ ev_io *io, int revents)
2159	{	2535	{
2160	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	2536	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2161		2537
2162	if (ev_cb (w))	2538	if (ev_cb (w))
2163	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2539	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2164	else	2540	else
2165	ev_embed_sweep (loop, w);	2541	ev_loop (w->other, EVLOOP_NONBLOCK);
2166	}	2542	}
		2543
		2544	static void
		2545	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2546	{
		2547	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2548
		2549	{
		2550	struct ev_loop *loop = w->other;
		2551
		2552	while (fdchangecnt)
		2553	{
		2554	fd_reify (EV_A);
		2555	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2556	}
		2557	}
		2558	}
		2559
		2560	#if 0
		2561	static void
		2562	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2563	{
		2564	ev_idle_stop (EV_A_ idle);
		2565	}
		2566	#endif
2167		2567
2168	void	2568	void
2169	ev_embed_start (EV_P_ ev_embed *w)	2569	ev_embed_start (EV_P_ ev_embed *w)
2170	{	2570	{
2171	if (expect_false (ev_is_active (w)))	2571	if (expect_false (ev_is_active (w)))
2172	return;	2572	return;
2173		2573
2174	{	2574	{
2175	struct ev_loop *loop = w->loop;	2575	struct ev_loop *loop = w->other;
2176	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2576	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2177	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2577	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2178	}	2578	}
2179		2579
2180	ev_set_priority (&w->io, ev_priority (w));	2580	ev_set_priority (&w->io, ev_priority (w));
2181	ev_io_start (EV_A_ &w->io);	2581	ev_io_start (EV_A_ &w->io);
		2582
		2583	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2584	ev_set_priority (&w->prepare, EV_MINPRI);
		2585	ev_prepare_start (EV_A_ &w->prepare);
		2586
		2587	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2182		2588
2183	ev_start (EV_A_ (W)w, 1);	2589	ev_start (EV_A_ (W)w, 1);
2184	}	2590	}
2185		2591
2186	void	2592	void
…		…
2189	clear_pending (EV_A_ (W)w);	2595	clear_pending (EV_A_ (W)w);
2190	if (expect_false (!ev_is_active (w)))	2596	if (expect_false (!ev_is_active (w)))
2191	return;	2597	return;
2192		2598
2193	ev_io_stop (EV_A_ &w->io);	2599	ev_io_stop (EV_A_ &w->io);
		2600	ev_prepare_stop (EV_A_ &w->prepare);
2194		2601
2195	ev_stop (EV_A_ (W)w);	2602	ev_stop (EV_A_ (W)w);
2196	}	2603	}
2197	#endif	2604	#endif
2198		2605
…		…
2214	clear_pending (EV_A_ (W)w);	2621	clear_pending (EV_A_ (W)w);
2215	if (expect_false (!ev_is_active (w)))	2622	if (expect_false (!ev_is_active (w)))
2216	return;	2623	return;
2217		2624
2218	{	2625	{
2219	int active = ((W)w)->active;	2626	int active = ev_active (w);
		2627
2220	forks [active - 1] = forks [--forkcnt];	2628	forks [active - 1] = forks [--forkcnt];
2221	((W)forks [active - 1])->active = active;	2629	ev_active (forks [active - 1]) = active;
2222	}	2630	}
2223		2631
2224	ev_stop (EV_A_ (W)w);	2632	ev_stop (EV_A_ (W)w);
		2633	}
		2634	#endif
		2635
		2636	#if EV_ASYNC_ENABLE
		2637	void
		2638	ev_async_start (EV_P_ ev_async *w)
		2639	{
		2640	if (expect_false (ev_is_active (w)))
		2641	return;
		2642
		2643	evpipe_init (EV_A);
		2644
		2645	ev_start (EV_A_ (W)w, ++asynccnt);
		2646	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2647	asyncs [asynccnt - 1] = w;
		2648	}
		2649
		2650	void
		2651	ev_async_stop (EV_P_ ev_async *w)
		2652	{
		2653	clear_pending (EV_A_ (W)w);
		2654	if (expect_false (!ev_is_active (w)))
		2655	return;
		2656
		2657	{
		2658	int active = ev_active (w);
		2659
		2660	asyncs [active - 1] = asyncs [--asynccnt];
		2661	ev_active (asyncs [active - 1]) = active;
		2662	}
		2663
		2664	ev_stop (EV_A_ (W)w);
		2665	}
		2666
		2667	void
		2668	ev_async_send (EV_P_ ev_async *w)
		2669	{
		2670	w->sent = 1;
		2671	evpipe_write (EV_A_ &gotasync);
2225	}	2672	}
2226	#endif	2673	#endif
2227		2674
2228	/*****************************************************************************/	2675	/*****************************************************************************/
2229		2676
…		…
2287	ev_timer_set (&once->to, timeout, 0.);	2734	ev_timer_set (&once->to, timeout, 0.);
2288	ev_timer_start (EV_A_ &once->to);	2735	ev_timer_start (EV_A_ &once->to);
2289	}	2736	}
2290	}	2737	}
2291		2738
		2739	#if EV_MULTIPLICITY
		2740	#include "ev_wrap.h"
		2741	#endif
		2742
2292	#ifdef __cplusplus	2743	#ifdef __cplusplus
2293	}	2744	}
2294	#endif	2745	#endif
2295		2746

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