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Comparing libev/ev.c (file contents):
Revision 1.173 by root, Sun Dec 9 19:42:57 2007 UTC vs.
Revision 1.241 by root, Fri May 9 13:57:00 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
37	# ifdef EV_CONFIG_H	46	# ifdef EV_CONFIG_H
38	# include EV_CONFIG_H	47	# include EV_CONFIG_H
39	# else	48	# else
40	# include "config.h"	49	# include "config.h"
…		…
51	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	61	# define EV_USE_MONOTONIC 0
53	# endif	62	# endif
54	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
56	# endif	73	# endif
57	# endif	74	# endif
58		75
59	# ifndef EV_USE_SELECT	76	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
102	# else	119	# else
103	# define EV_USE_INOTIFY 0	120	# define EV_USE_INOTIFY 0
104	# endif	121	# endif
105	# endif	122	# endif
106		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
107	#endif	132	#endif
108		133
109	#include <math.h>	134	#include <math.h>
110	#include <stdlib.h>	135	#include <stdlib.h>
111	#include <fcntl.h>	136	#include <fcntl.h>
…		…
136	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
137	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
138	# endif	163	# endif
139	#endif	164	#endif
140		165
141	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
142		167
143	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
144	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
145	#endif	170	#endif
146		171
147	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
149	#endif	178	#endif
150		179
151	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
153	#endif	182	#endif
…		…
159	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
160	# endif	189	# endif
161	#endif	190	#endif
162		191
163	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
164	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
165	#endif	198	#endif
166		199
167	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
168	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
169	#endif	202	#endif
…		…
171	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
172	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
173	#endif	206	#endif
174		207
175	#ifndef EV_USE_INOTIFY	208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
176	# define EV_USE_INOTIFY 0	212	# define EV_USE_INOTIFY 0
		213	# endif
177	#endif	214	#endif
178		215
179	#ifndef EV_PID_HASHSIZE	216	#ifndef EV_PID_HASHSIZE
180	# if EV_MINIMAL	217	# if EV_MINIMAL
181	# define EV_PID_HASHSIZE 1	218	# define EV_PID_HASHSIZE 1
…		…
190	# else	227	# else
191	# define EV_INOTIFY_HASHSIZE 16	228	# define EV_INOTIFY_HASHSIZE 16
192	# endif	229	# endif
193	#endif	230	#endif
194		231
195	/**/	232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196		241
197	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
198	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
199	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
200	#endif	245	#endif
…		…
202	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
203	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
204	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
205	#endif	250	#endif
206		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
207	#if EV_SELECT_IS_WINSOCKET	267	#if EV_SELECT_IS_WINSOCKET
208	# include <winsock.h>	268	# include <winsock.h>
209	#endif	269	#endif
210		270
211	#if !EV_STAT_ENABLE	271	#if EV_USE_EVENTFD
212	# define EV_USE_INOTIFY 0	272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
213	#endif	276	# endif
214		277	int eventfd (unsigned int initval, int flags);
215	#if EV_USE_INOTIFY	278	# ifdef __cplusplus
216	# include <sys/inotify.h>	279	}
		280	# endif
217	#endif	281	#endif
218		282
219	/**/	283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220		294
221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
224		298
225	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
226	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
227	# define noinline __attribute__ ((noinline))	301	# define noinline __attribute__ ((noinline))
228	#else	302	#else
229	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
230	# define noinline	304	# define noinline
231	# if __STDC_VERSION__ < 199901L	305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
232	# define inline	306	# define inline
233	# endif	307	# endif
234	#endif	308	#endif
235		309
236	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
251		325
252	typedef ev_watcher *W;	326	typedef ev_watcher *W;
253	typedef ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
254	typedef ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
255		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
256	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
257		338
258	#ifdef _WIN32	339	#ifdef _WIN32
259	# include "ev_win32.c"	340	# include "ev_win32.c"
260	#endif	341	#endif
261		342
…		…
282	perror (msg);	363	perror (msg);
283	abort ();	364	abort ();
284	}	365	}
285	}	366	}
286		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
287	static void *(*alloc)(void *ptr, long size);	383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
288		384
289	void	385	void
290	ev_set_allocator (void *(*cb)(void *ptr, long size))	386	ev_set_allocator (void *(*cb)(void *ptr, long size))
291	{	387	{
292	alloc = cb;	388	alloc = cb;
293	}	389	}
294		390
295	inline_speed void *	391	inline_speed void *
296	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
297	{	393	{
298	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
299		395
300	if (!ptr && size)	396	if (!ptr && size)
301	{	397	{
302	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
303	abort ();	399	abort ();
…		…
326	W w;	422	W w;
327	int events;	423	int events;
328	} ANPENDING;	424	} ANPENDING;
329		425
330	#if EV_USE_INOTIFY	426	#if EV_USE_INOTIFY
		427	/* hash table entry per inotify-id */
331	typedef struct	428	typedef struct
332	{	429	{
333	WL head;	430	WL head;
334	} ANFS;	431	} ANFS;
		432	#endif
		433
		434	/* Heap Entry */
		435	#if EV_HEAP_CACHE_AT
		436	typedef struct {
		437	WT w;
		438	ev_tstamp at;
		439	} ANHE;
		440
		441	#define ANHE_w(he) (he) /* access watcher, read-write */
		442	#define ANHE_at(he) (he)->at /* acces cahced at, read-only */
		443	#define ANHE_at_set(he) (he)->at = (he)->w->at /* update at from watcher */
		444	#else
		445	typedef WT ANHE;
		446
		447	#define ANHE_w(he) (he)
		448	#define ANHE_at(he) (he)->at
		449	#define ANHE_at_set(he)
335	#endif	450	#endif
336		451
337	#if EV_MULTIPLICITY	452	#if EV_MULTIPLICITY
338		453
339	struct ev_loop	454	struct ev_loop
…		…
397	{	512	{
398	return ev_rt_now;	513	return ev_rt_now;
399	}	514	}
400	#endif	515	#endif
401		516
		517	void
		518	ev_sleep (ev_tstamp delay)
		519	{
		520	if (delay > 0.)
		521	{
		522	#if EV_USE_NANOSLEEP
		523	struct timespec ts;
		524
		525	ts.tv_sec = (time_t)delay;
		526	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		527
		528	nanosleep (&ts, 0);
		529	#elif defined(_WIN32)
		530	Sleep ((unsigned long)(delay * 1e3));
		531	#else
		532	struct timeval tv;
		533
		534	tv.tv_sec = (time_t)delay;
		535	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		536
		537	select (0, 0, 0, 0, &tv);
		538	#endif
		539	}
		540	}
		541
		542	/*****************************************************************************/
		543
		544	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		545
402	int inline_size	546	int inline_size
403	array_nextsize (int elem, int cur, int cnt)	547	array_nextsize (int elem, int cur, int cnt)
404	{	548	{
405	int ncur = cur + 1;	549	int ncur = cur + 1;
406		550
407	do	551	do
408	ncur <<= 1;	552	ncur <<= 1;
409	while (cnt > ncur);	553	while (cnt > ncur);
410		554
411	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	555	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
412	if (elem * ncur > 4096)	556	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
413	{	557	{
414	ncur *= elem;	558	ncur *= elem;
415	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;	559	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
416	ncur = ncur - sizeof (void *) * 4;	560	ncur = ncur - sizeof (void *) * 4;
417	ncur /= elem;	561	ncur /= elem;
418	}	562	}
419		563
420	return ncur;	564	return ncur;
…		…
466	pendings [pri][w_->pending - 1].w = w_;	610	pendings [pri][w_->pending - 1].w = w_;
467	pendings [pri][w_->pending - 1].events = revents;	611	pendings [pri][w_->pending - 1].events = revents;
468	}	612	}
469	}	613	}
470		614
471	void inline_size	615	void inline_speed
472	queue_events (EV_P_ W *events, int eventcnt, int type)	616	queue_events (EV_P_ W *events, int eventcnt, int type)
473	{	617	{
474	int i;	618	int i;
475		619
476	for (i = 0; i < eventcnt; ++i)	620	for (i = 0; i < eventcnt; ++i)
…		…
523	{	667	{
524	int fd = fdchanges [i];	668	int fd = fdchanges [i];
525	ANFD *anfd = anfds + fd;	669	ANFD *anfd = anfds + fd;
526	ev_io *w;	670	ev_io *w;
527		671
528	int events = 0;	672	unsigned char events = 0;
529		673
530	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	674	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
531	events |= w->events;	675	events |= (unsigned char)w->events;
532		676
533	#if EV_SELECT_IS_WINSOCKET	677	#if EV_SELECT_IS_WINSOCKET
534	if (events)	678	if (events)
535	{	679	{
536	unsigned long argp;	680	unsigned long argp;
		681	#ifdef EV_FD_TO_WIN32_HANDLE
		682	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		683	#else
537	anfd->handle = _get_osfhandle (fd);	684	anfd->handle = _get_osfhandle (fd);
		685	#endif
538	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	686	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
539	}	687	}
540	#endif	688	#endif
541		689
		690	{
		691	unsigned char o_events = anfd->events;
		692	unsigned char o_reify = anfd->reify;
		693
542	anfd->reify = 0;	694	anfd->reify = 0;
543
544	backend_modify (EV_A_ fd, anfd->events, events);
545	anfd->events = events;	695	anfd->events = events;
		696
		697	if (o_events != events || o_reify & EV_IOFDSET)
		698	backend_modify (EV_A_ fd, o_events, events);
		699	}
546	}	700	}
547		701
548	fdchangecnt = 0;	702	fdchangecnt = 0;
549	}	703	}
550		704
551	void inline_size	705	void inline_size
552	fd_change (EV_P_ int fd)	706	fd_change (EV_P_ int fd, int flags)
553	{	707	{
554	if (expect_false (anfds [fd].reify))	708	unsigned char reify = anfds [fd].reify;
555	return;
556
557	anfds [fd].reify = 1;	709	anfds [fd].reify |= flags;
558		710
		711	if (expect_true (!reify))
		712	{
559	++fdchangecnt;	713	++fdchangecnt;
560	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	714	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
561	fdchanges [fdchangecnt - 1] = fd;	715	fdchanges [fdchangecnt - 1] = fd;
		716	}
562	}	717	}
563		718
564	void inline_speed	719	void inline_speed
565	fd_kill (EV_P_ int fd)	720	fd_kill (EV_P_ int fd)
566	{	721	{
…		…
617		772
618	for (fd = 0; fd < anfdmax; ++fd)	773	for (fd = 0; fd < anfdmax; ++fd)
619	if (anfds [fd].events)	774	if (anfds [fd].events)
620	{	775	{
621	anfds [fd].events = 0;	776	anfds [fd].events = 0;
622	fd_change (EV_A_ fd);	777	fd_change (EV_A_ fd, EV_IOFDSET | 1);
623	}	778	}
624	}	779	}
625		780
626	/*****************************************************************************/	781	/*****************************************************************************/
627		782
		783	/*
		784	* the heap functions want a real array index. array index 0 uis guaranteed to not
		785	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		786	* the branching factor of the d-tree.
		787	*/
		788
		789	/*
		790	* at the moment we allow libev the luxury of two heaps,
		791	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		792	* which is more cache-efficient.
		793	* the difference is about 5% with 50000+ watchers.
		794	*/
		795	#define EV_USE_4HEAP !EV_MINIMAL
		796	#if EV_USE_4HEAP
		797
		798	#define DHEAP 4
		799	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		800
		801	/* towards the root */
628	void inline_speed	802	void inline_speed
629	upheap (WT *heap, int k)	803	upheap (ANHE *heap, int k)
630	{	804	{
631	WT w = heap [k];	805	ANHE he = heap [k];
632		806
633	while (k && heap [k >> 1]->at > w->at)	807	for (;;)
634	{	808	{
		809	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		810
		811	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
		812	break;
		813
635	heap [k] = heap [k >> 1];	814	heap [k] = heap [p];
636	((W)heap [k])->active = k + 1;	815	ev_active (ANHE_w (heap [k])) = k;
637	k >>= 1;	816	k = p;
		817	}
		818
		819	ev_active (ANHE_w (he)) = k;
		820	heap [k] = he;
		821	}
		822
		823	/* away from the root */
		824	void inline_speed
		825	downheap (ANHE *heap, int N, int k)
		826	{
		827	ANHE he = heap [k];
		828	ANHE *E = heap + N + HEAP0;
		829
		830	for (;;)
		831	{
		832	ev_tstamp minat;
		833	ANHE *minpos;
		834	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		835
		836	// find minimum child
		837	if (expect_true (pos + DHEAP - 1 < E))
		838	{
		839	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		840	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		841	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		842	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		843	}
		844	else if (pos < E)
		845	{
		846	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		847	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else
		852	break;
		853
		854	if (ANHE_at (he) <= minat)
		855	break;
		856
		857	ev_active (ANHE_w (*minpos)) = k;
		858	heap [k] = *minpos;
		859
		860	k = minpos - heap;
		861	}
		862
		863	ev_active (ANHE_w (he)) = k;
		864	heap [k] = he;
		865	}
		866
		867	#else // 4HEAP
		868
		869	#define HEAP0 1
		870
		871	/* towards the root */
		872	void inline_speed
		873	upheap (ANHE *heap, int k)
		874	{
		875	ANHE he = heap [k];
		876
		877	for (;;)
		878	{
		879	int p = k >> 1;
		880
		881	/* maybe we could use a dummy element at heap [0]? */
		882	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		883	break;
		884
		885	heap [k] = heap [p];
		886	ev_active (ANHE_w (heap [k])) = k;
		887	k = p;
638	}	888	}
639		889
640	heap [k] = w;	890	heap [k] = w;
641	((W)heap [k])->active = k + 1;	891	ev_active (ANHE_w (heap [k])) = k;
642
643	}	892	}
644		893
		894	/* away from the root */
645	void inline_speed	895	void inline_speed
646	downheap (WT *heap, int N, int k)	896	downheap (ANHE *heap, int N, int k)
647	{	897	{
648	WT w = heap [k];	898	ANHE he = heap [k];
649		899
650	while (k < (N >> 1))	900	for (;;)
651	{	901	{
652	int j = k << 1;	902	int c = k << 1;
653		903
654	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	904	if (c > N)
655	++j;
656
657	if (w->at <= heap [j]->at)
658	break;	905	break;
659		906
		907	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		908	? 1 : 0;
		909
		910	if (w->at <= ANHE_at (heap [c]))
		911	break;
		912
660	heap [k] = heap [j];	913	heap [k] = heap [c];
661	((W)heap [k])->active = k + 1;	914	ev_active (ANHE_w (heap [k])) = k;
		915
662	k = j;	916	k = c;
663	}	917	}
664		918
665	heap [k] = w;	919	heap [k] = he;
666	((W)heap [k])->active = k + 1;	920	ev_active (ANHE_w (he)) = k;
667	}	921	}
		922	#endif
668		923
669	void inline_size	924	void inline_size
670	adjustheap (WT *heap, int N, int k)	925	adjustheap (ANHE *heap, int N, int k)
671	{	926	{
672	upheap (heap, k);	927	upheap (heap, k);
673	downheap (heap, N, k);	928	downheap (heap, N, k);
674	}	929	}
675		930
676	/*****************************************************************************/	931	/*****************************************************************************/
677		932
678	typedef struct	933	typedef struct
679	{	934	{
680	WL head;	935	WL head;
681	sig_atomic_t volatile gotsig;	936	EV_ATOMIC_T gotsig;
682	} ANSIG;	937	} ANSIG;
683		938
684	static ANSIG *signals;	939	static ANSIG *signals;
685	static int signalmax;	940	static int signalmax;
686		941
687	static int sigpipe [2];	942	static EV_ATOMIC_T gotsig;
688	static sig_atomic_t volatile gotsig;
689	static ev_io sigev;
690		943
691	void inline_size	944	void inline_size
692	signals_init (ANSIG *base, int count)	945	signals_init (ANSIG *base, int count)
693	{	946	{
694	while (count--)	947	while (count--)
…		…
698		951
699	++base;	952	++base;
700	}	953	}
701	}	954	}
702		955
703	static void	956	/*****************************************************************************/
704	sighandler (int signum)
705	{
706	#if _WIN32
707	signal (signum, sighandler);
708	#endif
709
710	signals [signum - 1].gotsig = 1;
711
712	if (!gotsig)
713	{
714	int old_errno = errno;
715	gotsig = 1;
716	write (sigpipe [1], &signum, 1);
717	errno = old_errno;
718	}
719	}
720
721	void noinline
722	ev_feed_signal_event (EV_P_ int signum)
723	{
724	WL w;
725
726	#if EV_MULTIPLICITY
727	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
728	#endif
729
730	--signum;
731
732	if (signum < 0 || signum >= signalmax)
733	return;
734
735	signals [signum].gotsig = 0;
736
737	for (w = signals [signum].head; w; w = w->next)
738	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
739	}
740
741	static void
742	sigcb (EV_P_ ev_io *iow, int revents)
743	{
744	int signum;
745
746	read (sigpipe [0], &revents, 1);
747	gotsig = 0;
748
749	for (signum = signalmax; signum--; )
750	if (signals [signum].gotsig)
751	ev_feed_signal_event (EV_A_ signum + 1);
752	}
753		957
754	void inline_speed	958	void inline_speed
755	fd_intern (int fd)	959	fd_intern (int fd)
756	{	960	{
757	#ifdef _WIN32	961	#ifdef _WIN32
…		…
762	fcntl (fd, F_SETFL, O_NONBLOCK);	966	fcntl (fd, F_SETFL, O_NONBLOCK);
763	#endif	967	#endif
764	}	968	}
765		969
766	static void noinline	970	static void noinline
767	siginit (EV_P)	971	evpipe_init (EV_P)
768	{	972	{
		973	if (!ev_is_active (&pipeev))
		974	{
		975	#if EV_USE_EVENTFD
		976	if ((evfd = eventfd (0, 0)) >= 0)
		977	{
		978	evpipe [0] = -1;
		979	fd_intern (evfd);
		980	ev_io_set (&pipeev, evfd, EV_READ);
		981	}
		982	else
		983	#endif
		984	{
		985	while (pipe (evpipe))
		986	syserr ("(libev) error creating signal/async pipe");
		987
769	fd_intern (sigpipe [0]);	988	fd_intern (evpipe [0]);
770	fd_intern (sigpipe [1]);	989	fd_intern (evpipe [1]);
		990	ev_io_set (&pipeev, evpipe [0], EV_READ);
		991	}
771		992
772	ev_io_set (&sigev, sigpipe [0], EV_READ);
773	ev_io_start (EV_A_ &sigev);	993	ev_io_start (EV_A_ &pipeev);
774	ev_unref (EV_A); /* child watcher should not keep loop alive */	994	ev_unref (EV_A); /* watcher should not keep loop alive */
		995	}
		996	}
		997
		998	void inline_size
		999	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1000	{
		1001	if (!*flag)
		1002	{
		1003	int old_errno = errno; /* save errno because write might clobber it */
		1004
		1005	*flag = 1;
		1006
		1007	#if EV_USE_EVENTFD
		1008	if (evfd >= 0)
		1009	{
		1010	uint64_t counter = 1;
		1011	write (evfd, &counter, sizeof (uint64_t));
		1012	}
		1013	else
		1014	#endif
		1015	write (evpipe [1], &old_errno, 1);
		1016
		1017	errno = old_errno;
		1018	}
		1019	}
		1020
		1021	static void
		1022	pipecb (EV_P_ ev_io *iow, int revents)
		1023	{
		1024	#if EV_USE_EVENTFD
		1025	if (evfd >= 0)
		1026	{
		1027	uint64_t counter;
		1028	read (evfd, &counter, sizeof (uint64_t));
		1029	}
		1030	else
		1031	#endif
		1032	{
		1033	char dummy;
		1034	read (evpipe [0], &dummy, 1);
		1035	}
		1036
		1037	if (gotsig && ev_is_default_loop (EV_A))
		1038	{
		1039	int signum;
		1040	gotsig = 0;
		1041
		1042	for (signum = signalmax; signum--; )
		1043	if (signals [signum].gotsig)
		1044	ev_feed_signal_event (EV_A_ signum + 1);
		1045	}
		1046
		1047	#if EV_ASYNC_ENABLE
		1048	if (gotasync)
		1049	{
		1050	int i;
		1051	gotasync = 0;
		1052
		1053	for (i = asynccnt; i--; )
		1054	if (asyncs [i]->sent)
		1055	{
		1056	asyncs [i]->sent = 0;
		1057	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1058	}
		1059	}
		1060	#endif
775	}	1061	}
776		1062
777	/*****************************************************************************/	1063	/*****************************************************************************/
778		1064
		1065	static void
		1066	ev_sighandler (int signum)
		1067	{
		1068	#if EV_MULTIPLICITY
		1069	struct ev_loop *loop = &default_loop_struct;
		1070	#endif
		1071
		1072	#if _WIN32
		1073	signal (signum, ev_sighandler);
		1074	#endif
		1075
		1076	signals [signum - 1].gotsig = 1;
		1077	evpipe_write (EV_A_ &gotsig);
		1078	}
		1079
		1080	void noinline
		1081	ev_feed_signal_event (EV_P_ int signum)
		1082	{
		1083	WL w;
		1084
		1085	#if EV_MULTIPLICITY
		1086	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1087	#endif
		1088
		1089	--signum;
		1090
		1091	if (signum < 0 || signum >= signalmax)
		1092	return;
		1093
		1094	signals [signum].gotsig = 0;
		1095
		1096	for (w = signals [signum].head; w; w = w->next)
		1097	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1098	}
		1099
		1100	/*****************************************************************************/
		1101
779	static ev_child *childs [EV_PID_HASHSIZE];	1102	static WL childs [EV_PID_HASHSIZE];
780		1103
781	#ifndef _WIN32	1104	#ifndef _WIN32
782		1105
783	static ev_signal childev;	1106	static ev_signal childev;
784		1107
		1108	#ifndef WIFCONTINUED
		1109	# define WIFCONTINUED(status) 0
		1110	#endif
		1111
785	void inline_speed	1112	void inline_speed
786	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1113	child_reap (EV_P_ int chain, int pid, int status)
787	{	1114	{
788	ev_child *w;	1115	ev_child *w;
		1116	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
789		1117
790	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1118	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1119	{
791	if (w->pid == pid || !w->pid)	1120	if ((w->pid == pid || !w->pid)
		1121	&& (!traced || (w->flags & 1)))
792	{	1122	{
793	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */	1123	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
794	w->rpid = pid;	1124	w->rpid = pid;
795	w->rstatus = status;	1125	w->rstatus = status;
796	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1126	ev_feed_event (EV_A_ (W)w, EV_CHILD);
797	}	1127	}
		1128	}
798	}	1129	}
799		1130
800	#ifndef WCONTINUED	1131	#ifndef WCONTINUED
801	# define WCONTINUED 0	1132	# define WCONTINUED 0
802	#endif	1133	#endif
…		…
811	if (!WCONTINUED	1142	if (!WCONTINUED
812	|| errno != EINVAL	1143	|| errno != EINVAL
813	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))	1144	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
814	return;	1145	return;
815		1146
816	/* make sure we are called again until all childs have been reaped */	1147	/* make sure we are called again until all children have been reaped */
817	/* we need to do it this way so that the callback gets called before we continue */	1148	/* we need to do it this way so that the callback gets called before we continue */
818	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1149	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819		1150
820	child_reap (EV_A_ sw, pid, pid, status);	1151	child_reap (EV_A_ pid, pid, status);
821	if (EV_PID_HASHSIZE > 1)	1152	if (EV_PID_HASHSIZE > 1)
822	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1153	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823	}	1154	}
824		1155
825	#endif	1156	#endif
826		1157
827	/*****************************************************************************/	1158	/*****************************************************************************/
…		…
899	}	1230	}
900		1231
901	unsigned int	1232	unsigned int
902	ev_embeddable_backends (void)	1233	ev_embeddable_backends (void)
903	{	1234	{
904	return EVBACKEND_EPOLL	1235	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
905	| EVBACKEND_KQUEUE	1236
906	| EVBACKEND_PORT;	1237	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1238	/* please fix it and tell me how to detect the fix */
		1239	flags &= ~EVBACKEND_EPOLL;
		1240
		1241	return flags;
907	}	1242	}
908		1243
909	unsigned int	1244	unsigned int
910	ev_backend (EV_P)	1245	ev_backend (EV_P)
911	{	1246	{
…		…
914		1249
915	unsigned int	1250	unsigned int
916	ev_loop_count (EV_P)	1251	ev_loop_count (EV_P)
917	{	1252	{
918	return loop_count;	1253	return loop_count;
		1254	}
		1255
		1256	void
		1257	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1258	{
		1259	io_blocktime = interval;
		1260	}
		1261
		1262	void
		1263	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1264	{
		1265	timeout_blocktime = interval;
919	}	1266	}
920		1267
921	static void noinline	1268	static void noinline
922	loop_init (EV_P_ unsigned int flags)	1269	loop_init (EV_P_ unsigned int flags)
923	{	1270	{
…		…
929	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1276	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930	have_monotonic = 1;	1277	have_monotonic = 1;
931	}	1278	}
932	#endif	1279	#endif
933		1280
934	ev_rt_now = ev_time ();	1281	ev_rt_now = ev_time ();
935	mn_now = get_clock ();	1282	mn_now = get_clock ();
936	now_floor = mn_now;	1283	now_floor = mn_now;
937	rtmn_diff = ev_rt_now - mn_now;	1284	rtmn_diff = ev_rt_now - mn_now;
		1285
		1286	io_blocktime = 0.;
		1287	timeout_blocktime = 0.;
		1288	backend = 0;
		1289	backend_fd = -1;
		1290	gotasync = 0;
		1291	#if EV_USE_INOTIFY
		1292	fs_fd = -2;
		1293	#endif
938		1294
939	/* pid check not overridable via env */	1295	/* pid check not overridable via env */
940	#ifndef _WIN32	1296	#ifndef _WIN32
941	if (flags & EVFLAG_FORKCHECK)	1297	if (flags & EVFLAG_FORKCHECK)
942	curpid = getpid ();	1298	curpid = getpid ();
…		…
945	if (!(flags & EVFLAG_NOENV)	1301	if (!(flags & EVFLAG_NOENV)
946	&& !enable_secure ()	1302	&& !enable_secure ()
947	&& getenv ("LIBEV_FLAGS"))	1303	&& getenv ("LIBEV_FLAGS"))
948	flags = atoi (getenv ("LIBEV_FLAGS"));	1304	flags = atoi (getenv ("LIBEV_FLAGS"));
949		1305
950	if (!(flags & 0x0000ffffUL))	1306	if (!(flags & 0x0000ffffU))
951	flags |= ev_recommended_backends ();	1307	flags |= ev_recommended_backends ();
952
953	backend = 0;
954	backend_fd = -1;
955	#if EV_USE_INOTIFY
956	fs_fd = -2;
957	#endif
958		1308
959	#if EV_USE_PORT	1309	#if EV_USE_PORT
960	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1310	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961	#endif	1311	#endif
962	#if EV_USE_KQUEUE	1312	#if EV_USE_KQUEUE
…		…
970	#endif	1320	#endif
971	#if EV_USE_SELECT	1321	#if EV_USE_SELECT
972	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1322	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973	#endif	1323	#endif
974		1324
975	ev_init (&sigev, sigcb);	1325	ev_init (&pipeev, pipecb);
976	ev_set_priority (&sigev, EV_MAXPRI);	1326	ev_set_priority (&pipeev, EV_MAXPRI);
977	}	1327	}
978	}	1328	}
979		1329
980	static void noinline	1330	static void noinline
981	loop_destroy (EV_P)	1331	loop_destroy (EV_P)
982	{	1332	{
983	int i;	1333	int i;
		1334
		1335	if (ev_is_active (&pipeev))
		1336	{
		1337	ev_ref (EV_A); /* signal watcher */
		1338	ev_io_stop (EV_A_ &pipeev);
		1339
		1340	#if EV_USE_EVENTFD
		1341	if (evfd >= 0)
		1342	close (evfd);
		1343	#endif
		1344
		1345	if (evpipe [0] >= 0)
		1346	{
		1347	close (evpipe [0]);
		1348	close (evpipe [1]);
		1349	}
		1350	}
984		1351
985	#if EV_USE_INOTIFY	1352	#if EV_USE_INOTIFY
986	if (fs_fd >= 0)	1353	if (fs_fd >= 0)
987	close (fs_fd);	1354	close (fs_fd);
988	#endif	1355	#endif
…		…
1011	array_free (pending, [i]);	1378	array_free (pending, [i]);
1012	#if EV_IDLE_ENABLE	1379	#if EV_IDLE_ENABLE
1013	array_free (idle, [i]);	1380	array_free (idle, [i]);
1014	#endif	1381	#endif
1015	}	1382	}
		1383
		1384	ev_free (anfds); anfdmax = 0;
1016		1385
1017	/* have to use the microsoft-never-gets-it-right macro */	1386	/* have to use the microsoft-never-gets-it-right macro */
1018	array_free (fdchange, EMPTY);	1387	array_free (fdchange, EMPTY);
1019	array_free (timer, EMPTY);	1388	array_free (timer, EMPTY);
1020	#if EV_PERIODIC_ENABLE	1389	#if EV_PERIODIC_ENABLE
1021	array_free (periodic, EMPTY);	1390	array_free (periodic, EMPTY);
1022	#endif	1391	#endif
		1392	#if EV_FORK_ENABLE
		1393	array_free (fork, EMPTY);
		1394	#endif
1023	array_free (prepare, EMPTY);	1395	array_free (prepare, EMPTY);
1024	array_free (check, EMPTY);	1396	array_free (check, EMPTY);
		1397	#if EV_ASYNC_ENABLE
		1398	array_free (async, EMPTY);
		1399	#endif
1025		1400
1026	backend = 0;	1401	backend = 0;
1027	}	1402	}
1028		1403
		1404	#if EV_USE_INOTIFY
1029	void inline_size infy_fork (EV_P);	1405	void inline_size infy_fork (EV_P);
		1406	#endif
1030		1407
1031	void inline_size	1408	void inline_size
1032	loop_fork (EV_P)	1409	loop_fork (EV_P)
1033	{	1410	{
1034	#if EV_USE_PORT	1411	#if EV_USE_PORT
…		…
1042	#endif	1419	#endif
1043	#if EV_USE_INOTIFY	1420	#if EV_USE_INOTIFY
1044	infy_fork (EV_A);	1421	infy_fork (EV_A);
1045	#endif	1422	#endif
1046		1423
1047	if (ev_is_active (&sigev))	1424	if (ev_is_active (&pipeev))
1048	{	1425	{
1049	/* default loop */	1426	/* this "locks" the handlers against writing to the pipe */
		1427	/* while we modify the fd vars */
		1428	gotsig = 1;
		1429	#if EV_ASYNC_ENABLE
		1430	gotasync = 1;
		1431	#endif
1050		1432
1051	ev_ref (EV_A);	1433	ev_ref (EV_A);
1052	ev_io_stop (EV_A_ &sigev);	1434	ev_io_stop (EV_A_ &pipeev);
		1435
		1436	#if EV_USE_EVENTFD
		1437	if (evfd >= 0)
		1438	close (evfd);
		1439	#endif
		1440
		1441	if (evpipe [0] >= 0)
		1442	{
1053	close (sigpipe [0]);	1443	close (evpipe [0]);
1054	close (sigpipe [1]);	1444	close (evpipe [1]);
		1445	}
1055		1446
1056	while (pipe (sigpipe))
1057	syserr ("(libev) error creating pipe");
1058
1059	siginit (EV_A);	1447	evpipe_init (EV_A);
		1448	/* now iterate over everything, in case we missed something */
		1449	pipecb (EV_A_ &pipeev, EV_READ);
1060	}	1450	}
1061		1451
1062	postfork = 0;	1452	postfork = 0;
1063	}	1453	}
1064		1454
…		…
1086	}	1476	}
1087		1477
1088	void	1478	void
1089	ev_loop_fork (EV_P)	1479	ev_loop_fork (EV_P)
1090	{	1480	{
1091	postfork = 1;	1481	postfork = 1; /* must be in line with ev_default_fork */
1092	}	1482	}
1093
1094	#endif	1483	#endif
1095		1484
1096	#if EV_MULTIPLICITY	1485	#if EV_MULTIPLICITY
1097	struct ev_loop *	1486	struct ev_loop *
1098	ev_default_loop_init (unsigned int flags)	1487	ev_default_loop_init (unsigned int flags)
1099	#else	1488	#else
1100	int	1489	int
1101	ev_default_loop (unsigned int flags)	1490	ev_default_loop (unsigned int flags)
1102	#endif	1491	#endif
1103	{	1492	{
1104	if (sigpipe [0] == sigpipe [1])
1105	if (pipe (sigpipe))
1106	return 0;
1107
1108	if (!ev_default_loop_ptr)	1493	if (!ev_default_loop_ptr)
1109	{	1494	{
1110	#if EV_MULTIPLICITY	1495	#if EV_MULTIPLICITY
1111	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1496	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1112	#else	1497	#else
…		…
1115		1500
1116	loop_init (EV_A_ flags);	1501	loop_init (EV_A_ flags);
1117		1502
1118	if (ev_backend (EV_A))	1503	if (ev_backend (EV_A))
1119	{	1504	{
1120	siginit (EV_A);
1121
1122	#ifndef _WIN32	1505	#ifndef _WIN32
1123	ev_signal_init (&childev, childcb, SIGCHLD);	1506	ev_signal_init (&childev, childcb, SIGCHLD);
1124	ev_set_priority (&childev, EV_MAXPRI);	1507	ev_set_priority (&childev, EV_MAXPRI);
1125	ev_signal_start (EV_A_ &childev);	1508	ev_signal_start (EV_A_ &childev);
1126	ev_unref (EV_A); /* child watcher should not keep loop alive */	1509	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1143	#ifndef _WIN32	1526	#ifndef _WIN32
1144	ev_ref (EV_A); /* child watcher */	1527	ev_ref (EV_A); /* child watcher */
1145	ev_signal_stop (EV_A_ &childev);	1528	ev_signal_stop (EV_A_ &childev);
1146	#endif	1529	#endif
1147		1530
1148	ev_ref (EV_A); /* signal watcher */
1149	ev_io_stop (EV_A_ &sigev);
1150
1151	close (sigpipe [0]); sigpipe [0] = 0;
1152	close (sigpipe [1]); sigpipe [1] = 0;
1153
1154	loop_destroy (EV_A);	1531	loop_destroy (EV_A);
1155	}	1532	}
1156		1533
1157	void	1534	void
1158	ev_default_fork (void)	1535	ev_default_fork (void)
…		…
1160	#if EV_MULTIPLICITY	1537	#if EV_MULTIPLICITY
1161	struct ev_loop *loop = ev_default_loop_ptr;	1538	struct ev_loop *loop = ev_default_loop_ptr;
1162	#endif	1539	#endif
1163		1540
1164	if (backend)	1541	if (backend)
1165	postfork = 1;	1542	postfork = 1; /* must be in line with ev_loop_fork */
1166	}	1543	}
1167		1544
1168	/*****************************************************************************/	1545	/*****************************************************************************/
1169		1546
1170	void	1547	void
…		…
1190	p->w->pending = 0;	1567	p->w->pending = 0;
1191	EV_CB_INVOKE (p->w, p->events);	1568	EV_CB_INVOKE (p->w, p->events);
1192	}	1569	}
1193	}	1570	}
1194	}	1571	}
1195
1196	void inline_size
1197	timers_reify (EV_P)
1198	{
1199	while (timercnt && ((WT)timers [0])->at <= mn_now)
1200	{
1201	ev_timer *w = timers [0];
1202
1203	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1204
1205	/* first reschedule or stop timer */
1206	if (w->repeat)
1207	{
1208	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1209
1210	((WT)w)->at += w->repeat;
1211	if (((WT)w)->at < mn_now)
1212	((WT)w)->at = mn_now;
1213
1214	downheap ((WT *)timers, timercnt, 0);
1215	}
1216	else
1217	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1218
1219	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1220	}
1221	}
1222
1223	#if EV_PERIODIC_ENABLE
1224	void inline_size
1225	periodics_reify (EV_P)
1226	{
1227	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1228	{
1229	ev_periodic *w = periodics [0];
1230
1231	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1232
1233	/* first reschedule or stop timer */
1234	if (w->reschedule_cb)
1235	{
1236	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1237	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1238	downheap ((WT *)periodics, periodiccnt, 0);
1239	}
1240	else if (w->interval)
1241	{
1242	((WT)w)->at = w->offset + floor ((ev_rt_now - w->offset) / w->interval + 1.) * w->interval;
1243	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1244	downheap ((WT *)periodics, periodiccnt, 0);
1245	}
1246	else
1247	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1248
1249	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1250	}
1251	}
1252
1253	static void noinline
1254	periodics_reschedule (EV_P)
1255	{
1256	int i;
1257
1258	/* adjust periodics after time jump */
1259	for (i = 0; i < periodiccnt; ++i)
1260	{
1261	ev_periodic *w = periodics [i];
1262
1263	if (w->reschedule_cb)
1264	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1265	else if (w->interval)
1266	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1267	}
1268
1269	/* now rebuild the heap */
1270	for (i = periodiccnt >> 1; i--; )
1271	downheap ((WT *)periodics, periodiccnt, i);
1272	}
1273	#endif
1274		1572
1275	#if EV_IDLE_ENABLE	1573	#if EV_IDLE_ENABLE
1276	void inline_size	1574	void inline_size
1277	idle_reify (EV_P)	1575	idle_reify (EV_P)
1278	{	1576	{
…		…
1293	}	1591	}
1294	}	1592	}
1295	}	1593	}
1296	#endif	1594	#endif
1297		1595
1298	int inline_size	1596	void inline_size
1299	time_update_monotonic (EV_P)	1597	timers_reify (EV_P)
1300	{	1598	{
		1599	while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
		1600	{
		1601	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1602
		1603	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1604
		1605	/* first reschedule or stop timer */
		1606	if (w->repeat)
		1607	{
		1608	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1609
		1610	ev_at (w) += w->repeat;
		1611	if (ev_at (w) < mn_now)
		1612	ev_at (w) = mn_now;
		1613
		1614	downheap (timers, timercnt, HEAP0);
		1615	}
		1616	else
		1617	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1618
		1619	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1620	}
		1621	}
		1622
		1623	#if EV_PERIODIC_ENABLE
		1624	void inline_size
		1625	periodics_reify (EV_P)
		1626	{
		1627	while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
		1628	{
		1629	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1630
		1631	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1632
		1633	/* first reschedule or stop timer */
		1634	if (w->reschedule_cb)
		1635	{
		1636	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1637	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1638	downheap (periodics, periodiccnt, 1);
		1639	}
		1640	else if (w->interval)
		1641	{
		1642	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1643	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1644	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1645	downheap (periodics, periodiccnt, HEAP0);
		1646	}
		1647	else
		1648	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1649
		1650	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1651	}
		1652	}
		1653
		1654	static void noinline
		1655	periodics_reschedule (EV_P)
		1656	{
		1657	int i;
		1658
		1659	/* adjust periodics after time jump */
		1660	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1661	{
		1662	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		1663
		1664	if (w->reschedule_cb)
		1665	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1666	else if (w->interval)
		1667	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1668	}
		1669
		1670	/* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */
		1671	for (i = periodiccnt >> 1; --i; )
		1672	downheap (periodics, periodiccnt, i + HEAP0);
		1673	}
		1674	#endif
		1675
		1676	void inline_speed
		1677	time_update (EV_P_ ev_tstamp max_block)
		1678	{
		1679	int i;
		1680
		1681	#if EV_USE_MONOTONIC
		1682	if (expect_true (have_monotonic))
		1683	{
		1684	ev_tstamp odiff = rtmn_diff;
		1685
1301	mn_now = get_clock ();	1686	mn_now = get_clock ();
1302		1687
		1688	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1689	/* interpolate in the meantime */
1303	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1690	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304	{	1691	{
1305	ev_rt_now = rtmn_diff + mn_now;	1692	ev_rt_now = rtmn_diff + mn_now;
1306	return 0;	1693	return;
1307	}	1694	}
1308	else	1695
1309	{
1310	now_floor = mn_now;	1696	now_floor = mn_now;
1311	ev_rt_now = ev_time ();	1697	ev_rt_now = ev_time ();
1312	return 1;
1313	}
1314	}
1315		1698
1316	void inline_size	1699	/* loop a few times, before making important decisions.
1317	time_update (EV_P)	1700	* on the choice of "4": one iteration isn't enough,
1318	{	1701	* in case we get preempted during the calls to
1319	int i;	1702	* ev_time and get_clock. a second call is almost guaranteed
1320		1703	* to succeed in that case, though. and looping a few more times
1321	#if EV_USE_MONOTONIC	1704	* doesn't hurt either as we only do this on time-jumps or
1322	if (expect_true (have_monotonic))	1705	* in the unlikely event of having been preempted here.
1323	{	1706	*/
1324	if (time_update_monotonic (EV_A))	1707	for (i = 4; --i; )
1325	{	1708	{
1326	ev_tstamp odiff = rtmn_diff;
1327
1328	/* loop a few times, before making important decisions.
1329	* on the choice of "4": one iteration isn't enough,
1330	* in case we get preempted during the calls to
1331	* ev_time and get_clock. a second call is almost guaranteed
1332	* to succeed in that case, though. and looping a few more times
1333	* doesn't hurt either as we only do this on time-jumps or
1334	* in the unlikely event of having been preempted here.
1335	*/
1336	for (i = 4; --i; )
1337	{
1338	rtmn_diff = ev_rt_now - mn_now;	1709	rtmn_diff = ev_rt_now - mn_now;
1339		1710
1340	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1711	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1341	return; /* all is well */	1712	return; /* all is well */
1342		1713
1343	ev_rt_now = ev_time ();	1714	ev_rt_now = ev_time ();
1344	mn_now = get_clock ();	1715	mn_now = get_clock ();
1345	now_floor = mn_now;	1716	now_floor = mn_now;
1346	}	1717	}
1347		1718
1348	# if EV_PERIODIC_ENABLE	1719	# if EV_PERIODIC_ENABLE
1349	periodics_reschedule (EV_A);	1720	periodics_reschedule (EV_A);
1350	# endif	1721	# endif
1351	/* no timer adjustment, as the monotonic clock doesn't jump */	1722	/* no timer adjustment, as the monotonic clock doesn't jump */
1352	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1723	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353	}
1354	}	1724	}
1355	else	1725	else
1356	#endif	1726	#endif
1357	{	1727	{
1358	ev_rt_now = ev_time ();	1728	ev_rt_now = ev_time ();
1359		1729
1360	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1730	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361	{	1731	{
1362	#if EV_PERIODIC_ENABLE	1732	#if EV_PERIODIC_ENABLE
1363	periodics_reschedule (EV_A);	1733	periodics_reschedule (EV_A);
1364	#endif	1734	#endif
1365
1366	/* adjust timers. this is easy, as the offset is the same for all of them */	1735	/* adjust timers. this is easy, as the offset is the same for all of them */
1367	for (i = 0; i < timercnt; ++i)	1736	for (i = 0; i < timercnt; ++i)
		1737	{
		1738	ANHE *he = timers + i + HEAP0;
1368	((WT)timers [i])->at += ev_rt_now - mn_now;	1739	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1740	ANHE_at_set (*he);
		1741	}
1369	}	1742	}
1370		1743
1371	mn_now = ev_rt_now;	1744	mn_now = ev_rt_now;
1372	}	1745	}
1373	}	1746	}
…		…
1387	static int loop_done;	1760	static int loop_done;
1388		1761
1389	void	1762	void
1390	ev_loop (EV_P_ int flags)	1763	ev_loop (EV_P_ int flags)
1391	{	1764	{
1392	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	1765	loop_done = EVUNLOOP_CANCEL;
1393	? EVUNLOOP_ONE
1394	: EVUNLOOP_CANCEL;
1395		1766
1396	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1767	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1397		1768
1398	do	1769	do
1399	{	1770	{
…		…
1433	/* update fd-related kernel structures */	1804	/* update fd-related kernel structures */
1434	fd_reify (EV_A);	1805	fd_reify (EV_A);
1435		1806
1436	/* calculate blocking time */	1807	/* calculate blocking time */
1437	{	1808	{
1438	ev_tstamp block;	1809	ev_tstamp waittime = 0.;
		1810	ev_tstamp sleeptime = 0.;
1439		1811
1440	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))	1812	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1441	block = 0.; /* do not block at all */
1442	else
1443	{	1813	{
1444	/* update time to cancel out callback processing overhead */	1814	/* update time to cancel out callback processing overhead */
1445	#if EV_USE_MONOTONIC
1446	if (expect_true (have_monotonic))
1447	time_update_monotonic (EV_A);	1815	time_update (EV_A_ 1e100);
1448	else
1449	#endif
1450	{
1451	ev_rt_now = ev_time ();
1452	mn_now = ev_rt_now;
1453	}
1454		1816
1455	block = MAX_BLOCKTIME;	1817	waittime = MAX_BLOCKTIME;
1456		1818
1457	if (timercnt)	1819	if (timercnt)
1458	{	1820	{
1459	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1821	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1460	if (block > to) block = to;	1822	if (waittime > to) waittime = to;
1461	}	1823	}
1462		1824
1463	#if EV_PERIODIC_ENABLE	1825	#if EV_PERIODIC_ENABLE
1464	if (periodiccnt)	1826	if (periodiccnt)
1465	{	1827	{
1466	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1828	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1467	if (block > to) block = to;	1829	if (waittime > to) waittime = to;
1468	}	1830	}
1469	#endif	1831	#endif
1470		1832
1471	if (expect_false (block < 0.)) block = 0.;	1833	if (expect_false (waittime < timeout_blocktime))
		1834	waittime = timeout_blocktime;
		1835
		1836	sleeptime = waittime - backend_fudge;
		1837
		1838	if (expect_true (sleeptime > io_blocktime))
		1839	sleeptime = io_blocktime;
		1840
		1841	if (sleeptime)
		1842	{
		1843	ev_sleep (sleeptime);
		1844	waittime -= sleeptime;
		1845	}
1472	}	1846	}
1473		1847
1474	++loop_count;	1848	++loop_count;
1475	backend_poll (EV_A_ block);	1849	backend_poll (EV_A_ waittime);
		1850
		1851	/* update ev_rt_now, do magic */
		1852	time_update (EV_A_ waittime + sleeptime);
1476	}	1853	}
1477
1478	/* update ev_rt_now, do magic */
1479	time_update (EV_A);
1480		1854
1481	/* queue pending timers and reschedule them */	1855	/* queue pending timers and reschedule them */
1482	timers_reify (EV_A); /* relative timers called last */	1856	timers_reify (EV_A); /* relative timers called last */
1483	#if EV_PERIODIC_ENABLE	1857	#if EV_PERIODIC_ENABLE
1484	periodics_reify (EV_A); /* absolute timers called first */	1858	periodics_reify (EV_A); /* absolute timers called first */
…		…
1492	/* queue check watchers, to be executed first */	1866	/* queue check watchers, to be executed first */
1493	if (expect_false (checkcnt))	1867	if (expect_false (checkcnt))
1494	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1868	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1495		1869
1496	call_pending (EV_A);	1870	call_pending (EV_A);
1497
1498	}	1871	}
1499	while (expect_true (activecnt && !loop_done));	1872	while (expect_true (
		1873	activecnt
		1874	&& !loop_done
		1875	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1876	));
1500		1877
1501	if (loop_done == EVUNLOOP_ONE)	1878	if (loop_done == EVUNLOOP_ONE)
1502	loop_done = EVUNLOOP_CANCEL;	1879	loop_done = EVUNLOOP_CANCEL;
1503	}	1880	}
1504		1881
…		…
1595		1972
1596	assert (("ev_io_start called with negative fd", fd >= 0));	1973	assert (("ev_io_start called with negative fd", fd >= 0));
1597		1974
1598	ev_start (EV_A_ (W)w, 1);	1975	ev_start (EV_A_ (W)w, 1);
1599	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1976	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1600	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1977	wlist_add (&anfds[fd].head, (WL)w);
1601		1978
1602	fd_change (EV_A_ fd);	1979	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1980	w->events &= ~EV_IOFDSET;
1603	}	1981	}
1604		1982
1605	void noinline	1983	void noinline
1606	ev_io_stop (EV_P_ ev_io *w)	1984	ev_io_stop (EV_P_ ev_io *w)
1607	{	1985	{
…		…
1609	if (expect_false (!ev_is_active (w)))	1987	if (expect_false (!ev_is_active (w)))
1610	return;	1988	return;
1611		1989
1612	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1990	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1613		1991
1614	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1992	wlist_del (&anfds[w->fd].head, (WL)w);
1615	ev_stop (EV_A_ (W)w);	1993	ev_stop (EV_A_ (W)w);
1616		1994
1617	fd_change (EV_A_ w->fd);	1995	fd_change (EV_A_ w->fd, 1);
1618	}	1996	}
1619		1997
1620	void noinline	1998	void noinline
1621	ev_timer_start (EV_P_ ev_timer *w)	1999	ev_timer_start (EV_P_ ev_timer *w)
1622	{	2000	{
1623	if (expect_false (ev_is_active (w)))	2001	if (expect_false (ev_is_active (w)))
1624	return;	2002	return;
1625		2003
1626	((WT)w)->at += mn_now;	2004	ev_at (w) += mn_now;
1627		2005
1628	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2006	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1629		2007
1630	ev_start (EV_A_ (W)w, ++timercnt);	2008	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1631	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	2009	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1632	timers [timercnt - 1] = w;	2010	ANHE_w (timers [ev_active (w)]) = (WT)w;
1633	upheap ((WT *)timers, timercnt - 1);	2011	ANHE_at_set (timers [ev_active (w)]);
		2012	upheap (timers, ev_active (w));
1634		2013
1635	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/	2014	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1636	}	2015	}
1637		2016
1638	void noinline	2017	void noinline
1639	ev_timer_stop (EV_P_ ev_timer *w)	2018	ev_timer_stop (EV_P_ ev_timer *w)
1640	{	2019	{
1641	clear_pending (EV_A_ (W)w);	2020	clear_pending (EV_A_ (W)w);
1642	if (expect_false (!ev_is_active (w)))	2021	if (expect_false (!ev_is_active (w)))
1643	return;	2022	return;
1644		2023
1645	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1646
1647	{	2024	{
1648	int active = ((W)w)->active;	2025	int active = ev_active (w);
1649		2026
		2027	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2028
1650	if (expect_true (--active < --timercnt))	2029	if (expect_true (active < timercnt + HEAP0 - 1))
1651	{	2030	{
1652	timers [active] = timers [timercnt];	2031	timers [active] = timers [timercnt + HEAP0 - 1];
1653	adjustheap ((WT *)timers, timercnt, active);	2032	adjustheap (timers, timercnt, active);
1654	}	2033	}
		2034
		2035	--timercnt;
1655	}	2036	}
1656		2037
1657	((WT)w)->at -= mn_now;	2038	ev_at (w) -= mn_now;
1658		2039
1659	ev_stop (EV_A_ (W)w);	2040	ev_stop (EV_A_ (W)w);
1660	}	2041	}
1661		2042
1662	void noinline	2043	void noinline
…		…
1664	{	2045	{
1665	if (ev_is_active (w))	2046	if (ev_is_active (w))
1666	{	2047	{
1667	if (w->repeat)	2048	if (w->repeat)
1668	{	2049	{
1669	((WT)w)->at = mn_now + w->repeat;	2050	ev_at (w) = mn_now + w->repeat;
		2051	ANHE_at_set (timers [ev_active (w)]);
1670	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2052	adjustheap (timers, timercnt, ev_active (w));
1671	}	2053	}
1672	else	2054	else
1673	ev_timer_stop (EV_A_ w);	2055	ev_timer_stop (EV_A_ w);
1674	}	2056	}
1675	else if (w->repeat)	2057	else if (w->repeat)
1676	{	2058	{
1677	w->at = w->repeat;	2059	ev_at (w) = w->repeat;
1678	ev_timer_start (EV_A_ w);	2060	ev_timer_start (EV_A_ w);
1679	}	2061	}
1680	}	2062	}
1681		2063
1682	#if EV_PERIODIC_ENABLE	2064	#if EV_PERIODIC_ENABLE
…		…
1685	{	2067	{
1686	if (expect_false (ev_is_active (w)))	2068	if (expect_false (ev_is_active (w)))
1687	return;	2069	return;
1688		2070
1689	if (w->reschedule_cb)	2071	if (w->reschedule_cb)
1690	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2072	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1691	else if (w->interval)	2073	else if (w->interval)
1692	{	2074	{
1693	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2075	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1694	/* this formula differs from the one in periodic_reify because we do not always round up */	2076	/* this formula differs from the one in periodic_reify because we do not always round up */
1695	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2077	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1696	}	2078	}
1697	else	2079	else
1698	((WT)w)->at = w->offset;	2080	ev_at (w) = w->offset;
1699		2081
1700	ev_start (EV_A_ (W)w, ++periodiccnt);	2082	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1701	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2083	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1702	periodics [periodiccnt - 1] = w;	2084	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1703	upheap ((WT *)periodics, periodiccnt - 1);	2085	upheap (periodics, ev_active (w));
1704		2086
1705	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	2087	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1706	}	2088	}
1707		2089
1708	void noinline	2090	void noinline
1709	ev_periodic_stop (EV_P_ ev_periodic *w)	2091	ev_periodic_stop (EV_P_ ev_periodic *w)
1710	{	2092	{
1711	clear_pending (EV_A_ (W)w);	2093	clear_pending (EV_A_ (W)w);
1712	if (expect_false (!ev_is_active (w)))	2094	if (expect_false (!ev_is_active (w)))
1713	return;	2095	return;
1714		2096
1715	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1716
1717	{	2097	{
1718	int active = ((W)w)->active;	2098	int active = ev_active (w);
1719		2099
		2100	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2101
1720	if (expect_true (--active < --periodiccnt))	2102	if (expect_true (active < periodiccnt + HEAP0 - 1))
1721	{	2103	{
1722	periodics [active] = periodics [periodiccnt];	2104	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1723	adjustheap ((WT *)periodics, periodiccnt, active);	2105	adjustheap (periodics, periodiccnt, active);
1724	}	2106	}
		2107
		2108	--periodiccnt;
1725	}	2109	}
1726		2110
1727	ev_stop (EV_A_ (W)w);	2111	ev_stop (EV_A_ (W)w);
1728	}	2112	}
1729		2113
…		…
1749	if (expect_false (ev_is_active (w)))	2133	if (expect_false (ev_is_active (w)))
1750	return;	2134	return;
1751		2135
1752	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2136	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1753		2137
		2138	evpipe_init (EV_A);
		2139
		2140	{
		2141	#ifndef _WIN32
		2142	sigset_t full, prev;
		2143	sigfillset (&full);
		2144	sigprocmask (SIG_SETMASK, &full, &prev);
		2145	#endif
		2146
		2147	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2148
		2149	#ifndef _WIN32
		2150	sigprocmask (SIG_SETMASK, &prev, 0);
		2151	#endif
		2152	}
		2153
1754	ev_start (EV_A_ (W)w, 1);	2154	ev_start (EV_A_ (W)w, 1);
1755	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2155	wlist_add (&signals [w->signum - 1].head, (WL)w);
1757		2156
1758	if (!((WL)w)->next)	2157	if (!((WL)w)->next)
1759	{	2158	{
1760	#if _WIN32	2159	#if _WIN32
1761	signal (w->signum, sighandler);	2160	signal (w->signum, ev_sighandler);
1762	#else	2161	#else
1763	struct sigaction sa;	2162	struct sigaction sa;
1764	sa.sa_handler = sighandler;	2163	sa.sa_handler = ev_sighandler;
1765	sigfillset (&sa.sa_mask);	2164	sigfillset (&sa.sa_mask);
1766	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2165	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1767	sigaction (w->signum, &sa, 0);	2166	sigaction (w->signum, &sa, 0);
1768	#endif	2167	#endif
1769	}	2168	}
…		…
1774	{	2173	{
1775	clear_pending (EV_A_ (W)w);	2174	clear_pending (EV_A_ (W)w);
1776	if (expect_false (!ev_is_active (w)))	2175	if (expect_false (!ev_is_active (w)))
1777	return;	2176	return;
1778		2177
1779	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2178	wlist_del (&signals [w->signum - 1].head, (WL)w);
1780	ev_stop (EV_A_ (W)w);	2179	ev_stop (EV_A_ (W)w);
1781		2180
1782	if (!signals [w->signum - 1].head)	2181	if (!signals [w->signum - 1].head)
1783	signal (w->signum, SIG_DFL);	2182	signal (w->signum, SIG_DFL);
1784	}	2183	}
…		…
1791	#endif	2190	#endif
1792	if (expect_false (ev_is_active (w)))	2191	if (expect_false (ev_is_active (w)))
1793	return;	2192	return;
1794		2193
1795	ev_start (EV_A_ (W)w, 1);	2194	ev_start (EV_A_ (W)w, 1);
1796	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2195	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1797	}	2196	}
1798		2197
1799	void	2198	void
1800	ev_child_stop (EV_P_ ev_child *w)	2199	ev_child_stop (EV_P_ ev_child *w)
1801	{	2200	{
1802	clear_pending (EV_A_ (W)w);	2201	clear_pending (EV_A_ (W)w);
1803	if (expect_false (!ev_is_active (w)))	2202	if (expect_false (!ev_is_active (w)))
1804	return;	2203	return;
1805		2204
1806	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2205	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1807	ev_stop (EV_A_ (W)w);	2206	ev_stop (EV_A_ (W)w);
1808	}	2207	}
1809		2208
1810	#if EV_STAT_ENABLE	2209	#if EV_STAT_ENABLE
1811		2210
…		…
1830	if (w->wd < 0)	2229	if (w->wd < 0)
1831	{	2230	{
1832	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2231	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1833		2232
1834	/* monitor some parent directory for speedup hints */	2233	/* monitor some parent directory for speedup hints */
		2234	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2235	/* but an efficiency issue only */
1835	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2236	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1836	{	2237	{
1837	char path [4096];	2238	char path [4096];
1838	strcpy (path, w->path);	2239	strcpy (path, w->path);
1839		2240
…		…
2084	clear_pending (EV_A_ (W)w);	2485	clear_pending (EV_A_ (W)w);
2085	if (expect_false (!ev_is_active (w)))	2486	if (expect_false (!ev_is_active (w)))
2086	return;	2487	return;
2087		2488
2088	{	2489	{
2089	int active = ((W)w)->active;	2490	int active = ev_active (w);
2090		2491
2091	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2492	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2092	((W)idles [ABSPRI (w)][active - 1])->active = active;	2493	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2093		2494
2094	ev_stop (EV_A_ (W)w);	2495	ev_stop (EV_A_ (W)w);
2095	--idleall;	2496	--idleall;
2096	}	2497	}
2097	}	2498	}
…		…
2114	clear_pending (EV_A_ (W)w);	2515	clear_pending (EV_A_ (W)w);
2115	if (expect_false (!ev_is_active (w)))	2516	if (expect_false (!ev_is_active (w)))
2116	return;	2517	return;
2117		2518
2118	{	2519	{
2119	int active = ((W)w)->active;	2520	int active = ev_active (w);
		2521
2120	prepares [active - 1] = prepares [--preparecnt];	2522	prepares [active - 1] = prepares [--preparecnt];
2121	((W)prepares [active - 1])->active = active;	2523	ev_active (prepares [active - 1]) = active;
2122	}	2524	}
2123		2525
2124	ev_stop (EV_A_ (W)w);	2526	ev_stop (EV_A_ (W)w);
2125	}	2527	}
2126		2528
…		…
2141	clear_pending (EV_A_ (W)w);	2543	clear_pending (EV_A_ (W)w);
2142	if (expect_false (!ev_is_active (w)))	2544	if (expect_false (!ev_is_active (w)))
2143	return;	2545	return;
2144		2546
2145	{	2547	{
2146	int active = ((W)w)->active;	2548	int active = ev_active (w);
		2549
2147	checks [active - 1] = checks [--checkcnt];	2550	checks [active - 1] = checks [--checkcnt];
2148	((W)checks [active - 1])->active = active;	2551	ev_active (checks [active - 1]) = active;
2149	}	2552	}
2150		2553
2151	ev_stop (EV_A_ (W)w);	2554	ev_stop (EV_A_ (W)w);
2152	}	2555	}
2153		2556
2154	#if EV_EMBED_ENABLE	2557	#if EV_EMBED_ENABLE
2155	void noinline	2558	void noinline
2156	ev_embed_sweep (EV_P_ ev_embed *w)	2559	ev_embed_sweep (EV_P_ ev_embed *w)
2157	{	2560	{
2158	ev_loop (w->loop, EVLOOP_NONBLOCK);	2561	ev_loop (w->other, EVLOOP_NONBLOCK);
2159	}	2562	}
2160		2563
2161	static void	2564	static void
2162	embed_cb (EV_P_ ev_io *io, int revents)	2565	embed_io_cb (EV_P_ ev_io *io, int revents)
2163	{	2566	{
2164	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	2567	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2165		2568
2166	if (ev_cb (w))	2569	if (ev_cb (w))
2167	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2570	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2168	else	2571	else
2169	ev_embed_sweep (loop, w);	2572	ev_loop (w->other, EVLOOP_NONBLOCK);
2170	}	2573	}
		2574
		2575	static void
		2576	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2577	{
		2578	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2579
		2580	{
		2581	struct ev_loop *loop = w->other;
		2582
		2583	while (fdchangecnt)
		2584	{
		2585	fd_reify (EV_A);
		2586	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2587	}
		2588	}
		2589	}
		2590
		2591	#if 0
		2592	static void
		2593	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2594	{
		2595	ev_idle_stop (EV_A_ idle);
		2596	}
		2597	#endif
2171		2598
2172	void	2599	void
2173	ev_embed_start (EV_P_ ev_embed *w)	2600	ev_embed_start (EV_P_ ev_embed *w)
2174	{	2601	{
2175	if (expect_false (ev_is_active (w)))	2602	if (expect_false (ev_is_active (w)))
2176	return;	2603	return;
2177		2604
2178	{	2605	{
2179	struct ev_loop *loop = w->loop;	2606	struct ev_loop *loop = w->other;
2180	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2607	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2181	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2608	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2182	}	2609	}
2183		2610
2184	ev_set_priority (&w->io, ev_priority (w));	2611	ev_set_priority (&w->io, ev_priority (w));
2185	ev_io_start (EV_A_ &w->io);	2612	ev_io_start (EV_A_ &w->io);
		2613
		2614	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2615	ev_set_priority (&w->prepare, EV_MINPRI);
		2616	ev_prepare_start (EV_A_ &w->prepare);
		2617
		2618	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2186		2619
2187	ev_start (EV_A_ (W)w, 1);	2620	ev_start (EV_A_ (W)w, 1);
2188	}	2621	}
2189		2622
2190	void	2623	void
…		…
2193	clear_pending (EV_A_ (W)w);	2626	clear_pending (EV_A_ (W)w);
2194	if (expect_false (!ev_is_active (w)))	2627	if (expect_false (!ev_is_active (w)))
2195	return;	2628	return;
2196		2629
2197	ev_io_stop (EV_A_ &w->io);	2630	ev_io_stop (EV_A_ &w->io);
		2631	ev_prepare_stop (EV_A_ &w->prepare);
2198		2632
2199	ev_stop (EV_A_ (W)w);	2633	ev_stop (EV_A_ (W)w);
2200	}	2634	}
2201	#endif	2635	#endif
2202		2636
…		…
2218	clear_pending (EV_A_ (W)w);	2652	clear_pending (EV_A_ (W)w);
2219	if (expect_false (!ev_is_active (w)))	2653	if (expect_false (!ev_is_active (w)))
2220	return;	2654	return;
2221		2655
2222	{	2656	{
2223	int active = ((W)w)->active;	2657	int active = ev_active (w);
		2658
2224	forks [active - 1] = forks [--forkcnt];	2659	forks [active - 1] = forks [--forkcnt];
2225	((W)forks [active - 1])->active = active;	2660	ev_active (forks [active - 1]) = active;
2226	}	2661	}
2227		2662
2228	ev_stop (EV_A_ (W)w);	2663	ev_stop (EV_A_ (W)w);
		2664	}
		2665	#endif
		2666
		2667	#if EV_ASYNC_ENABLE
		2668	void
		2669	ev_async_start (EV_P_ ev_async *w)
		2670	{
		2671	if (expect_false (ev_is_active (w)))
		2672	return;
		2673
		2674	evpipe_init (EV_A);
		2675
		2676	ev_start (EV_A_ (W)w, ++asynccnt);
		2677	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2678	asyncs [asynccnt - 1] = w;
		2679	}
		2680
		2681	void
		2682	ev_async_stop (EV_P_ ev_async *w)
		2683	{
		2684	clear_pending (EV_A_ (W)w);
		2685	if (expect_false (!ev_is_active (w)))
		2686	return;
		2687
		2688	{
		2689	int active = ev_active (w);
		2690
		2691	asyncs [active - 1] = asyncs [--asynccnt];
		2692	ev_active (asyncs [active - 1]) = active;
		2693	}
		2694
		2695	ev_stop (EV_A_ (W)w);
		2696	}
		2697
		2698	void
		2699	ev_async_send (EV_P_ ev_async *w)
		2700	{
		2701	w->sent = 1;
		2702	evpipe_write (EV_A_ &gotasync);
2229	}	2703	}
2230	#endif	2704	#endif
2231		2705
2232	/*****************************************************************************/	2706	/*****************************************************************************/
2233		2707
…		…
2291	ev_timer_set (&once->to, timeout, 0.);	2765	ev_timer_set (&once->to, timeout, 0.);
2292	ev_timer_start (EV_A_ &once->to);	2766	ev_timer_start (EV_A_ &once->to);
2293	}	2767	}
2294	}	2768	}
2295		2769
		2770	#if EV_MULTIPLICITY
		2771	#include "ev_wrap.h"
		2772	#endif
		2773
2296	#ifdef __cplusplus	2774	#ifdef __cplusplus
2297	}	2775	}
2298	#endif	2776	#endif
2299		2777

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