[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.176 by root, Tue Dec 11 04:31:55 2007 UTC vs.
Revision 1.243 by root, Fri May 9 15:52:13 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	#ifndef EV_USE_4HEAP
		241	# define EV_USE_4HEAP !EV_MINIMAL
		242	#endif
		243
		244	#ifndef EV_HEAP_CACHE_AT
		245	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		246	#endif
		247
		248	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196		249
197	#ifndef CLOCK_MONOTONIC	250	#ifndef CLOCK_MONOTONIC
198	# undef EV_USE_MONOTONIC	251	# undef EV_USE_MONOTONIC
199	# define EV_USE_MONOTONIC 0	252	# define EV_USE_MONOTONIC 0
200	#endif	253	#endif
…		…
202	#ifndef CLOCK_REALTIME	255	#ifndef CLOCK_REALTIME
203	# undef EV_USE_REALTIME	256	# undef EV_USE_REALTIME
204	# define EV_USE_REALTIME 0	257	# define EV_USE_REALTIME 0
205	#endif	258	#endif
206		259
		260	#if !EV_STAT_ENABLE
		261	# undef EV_USE_INOTIFY
		262	# define EV_USE_INOTIFY 0
		263	#endif
		264
		265	#if !EV_USE_NANOSLEEP
		266	# ifndef _WIN32
		267	# include <sys/select.h>
		268	# endif
		269	#endif
		270
		271	#if EV_USE_INOTIFY
		272	# include <sys/inotify.h>
		273	#endif
		274
207	#if EV_SELECT_IS_WINSOCKET	275	#if EV_SELECT_IS_WINSOCKET
208	# include <winsock.h>	276	# include <winsock.h>
209	#endif	277	#endif
210		278
211	#if !EV_STAT_ENABLE	279	#if EV_USE_EVENTFD
212	# define EV_USE_INOTIFY 0	280	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		281	# include <stdint.h>
		282	# ifdef __cplusplus
		283	extern "C" {
213	#endif	284	# endif
214		285	int eventfd (unsigned int initval, int flags);
215	#if EV_USE_INOTIFY	286	# ifdef __cplusplus
216	# include <sys/inotify.h>	287	}
		288	# endif
217	#endif	289	#endif
218		290
219	/**/	291	/**/
220		292
221	/*	293	/*
222	* This is used to avoid floating point rounding problems.	294	* This is used to avoid floating point rounding problems.
223	* It is added to ev_rt_now when scheduling periodics	295	* It is added to ev_rt_now when scheduling periodics
224	* to ensure progress, time-wise, even when rounding	296	* to ensure progress, time-wise, even when rounding
225	* errors are against us.	297	* errors are against us.
226	* This value is good at least till the year 4000	298	* This value is good at least till the year 4000.
227	* and intervals up to 20 years.
228	* Better solutions welcome.	299	* Better solutions welcome.
229	*/	300	*/
230	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	301	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
231		302
232	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	303	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
233	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	304	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
234	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */	305	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
235		306
236	#if __GNUC__ >= 3	307	#if __GNUC__ >= 4
237	# define expect(expr,value) __builtin_expect ((expr),(value))	308	# define expect(expr,value) __builtin_expect ((expr),(value))
238	# define noinline __attribute__ ((noinline))	309	# define noinline __attribute__ ((noinline))
239	#else	310	#else
240	# define expect(expr,value) (expr)	311	# define expect(expr,value) (expr)
241	# define noinline	312	# define noinline
242	# if __STDC_VERSION__ < 199901L	313	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
243	# define inline	314	# define inline
244	# endif	315	# endif
245	#endif	316	#endif
246		317
247	#define expect_false(expr) expect ((expr) != 0, 0)	318	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
262		333
263	typedef ev_watcher *W;	334	typedef ev_watcher *W;
264	typedef ev_watcher_list *WL;	335	typedef ev_watcher_list *WL;
265	typedef ev_watcher_time *WT;	336	typedef ev_watcher_time *WT;
266		337
		338	#define ev_active(w) ((W)(w))->active
		339	#define ev_at(w) ((WT)(w))->at
		340
		341	#if EV_USE_MONOTONIC
		342	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		343	/* giving it a reasonably high chance of working on typical architetcures */
267	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	344	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		345	#endif
268		346
269	#ifdef _WIN32	347	#ifdef _WIN32
270	# include "ev_win32.c"	348	# include "ev_win32.c"
271	#endif	349	#endif
272		350
…		…
293	perror (msg);	371	perror (msg);
294	abort ();	372	abort ();
295	}	373	}
296	}	374	}
297		375
		376	static void *
		377	ev_realloc_emul (void *ptr, long size)
		378	{
		379	/* some systems, notably openbsd and darwin, fail to properly
		380	* implement realloc (x, 0) (as required by both ansi c-98 and
		381	* the single unix specification, so work around them here.
		382	*/
		383
		384	if (size)
		385	return realloc (ptr, size);
		386
		387	free (ptr);
		388	return 0;
		389	}
		390
298	static void (alloc)(void *ptr, long size);	391	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
299		392
300	void	393	void
301	ev_set_allocator (void (cb)(void *ptr, long size))	394	ev_set_allocator (void (cb)(void *ptr, long size))
302	{	395	{
303	alloc = cb;	396	alloc = cb;
304	}	397	}
305		398
306	inline_speed void *	399	inline_speed void *
307	ev_realloc (void *ptr, long size)	400	ev_realloc (void *ptr, long size)
308	{	401	{
309	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	402	ptr = alloc (ptr, size);
310		403
311	if (!ptr && size)	404	if (!ptr && size)
312	{	405	{
313	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	406	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
314	abort ();	407	abort ();
…		…
337	W w;	430	W w;
338	int events;	431	int events;
339	} ANPENDING;	432	} ANPENDING;
340		433
341	#if EV_USE_INOTIFY	434	#if EV_USE_INOTIFY
		435	/* hash table entry per inotify-id */
342	typedef struct	436	typedef struct
343	{	437	{
344	WL head;	438	WL head;
345	} ANFS;	439	} ANFS;
		440	#endif
		441
		442	/* Heap Entry */
		443	#if EV_HEAP_CACHE_AT
		444	typedef struct {
		445	ev_tstamp at;
		446	WT w;
		447	} ANHE;
		448
		449	#define ANHE_w(he) (he).w /* access watcher, read-write */
		450	#define ANHE_at(he) (he).at /* access cached at, read-only */
		451	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		452	#else
		453	typedef WT ANHE;
		454
		455	#define ANHE_w(he) (he)
		456	#define ANHE_at(he) (he)->at
		457	#define ANHE_at_set(he)
346	#endif	458	#endif
347		459
348	#if EV_MULTIPLICITY	460	#if EV_MULTIPLICITY
349		461
350	struct ev_loop	462	struct ev_loop
…		…
408	{	520	{
409	return ev_rt_now;	521	return ev_rt_now;
410	}	522	}
411	#endif	523	#endif
412		524
		525	void
		526	ev_sleep (ev_tstamp delay)
		527	{
		528	if (delay > 0.)
		529	{
		530	#if EV_USE_NANOSLEEP
		531	struct timespec ts;
		532
		533	ts.tv_sec = (time_t)delay;
		534	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		535
		536	nanosleep (&ts, 0);
		537	#elif defined(_WIN32)
		538	Sleep ((unsigned long)(delay * 1e3));
		539	#else
		540	struct timeval tv;
		541
		542	tv.tv_sec = (time_t)delay;
		543	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		544
		545	select (0, 0, 0, 0, &tv);
		546	#endif
		547	}
		548	}
		549
		550	/*****************************************************************************/
		551
		552	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
		553
413	int inline_size	554	int inline_size
414	array_nextsize (int elem, int cur, int cnt)	555	array_nextsize (int elem, int cur, int cnt)
415	{	556	{
416	int ncur = cur + 1;	557	int ncur = cur + 1;
417		558
418	do	559	do
419	ncur <<= 1;	560	ncur <<= 1;
420	while (cnt > ncur);	561	while (cnt > ncur);
421		562
422	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	563	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
423	if (elem * ncur > 4096)	564	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
424	{	565	{
425	ncur *= elem;	566	ncur *= elem;
426	ncur = (ncur + elem + 4095 + sizeof (void ) 4) & ~4095;	567	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
427	ncur = ncur - sizeof (void ) 4;	568	ncur = ncur - sizeof (void ) 4;
428	ncur /= elem;	569	ncur /= elem;
429	}	570	}
430		571
431	return ncur;	572	return ncur;
…		…
477	pendings [pri][w_->pending - 1].w = w_;	618	pendings [pri][w_->pending - 1].w = w_;
478	pendings [pri][w_->pending - 1].events = revents;	619	pendings [pri][w_->pending - 1].events = revents;
479	}	620	}
480	}	621	}
481		622
482	void inline_size	623	void inline_speed
483	queue_events (EV_P_ W *events, int eventcnt, int type)	624	queue_events (EV_P_ W *events, int eventcnt, int type)
484	{	625	{
485	int i;	626	int i;
486		627
487	for (i = 0; i < eventcnt; ++i)	628	for (i = 0; i < eventcnt; ++i)
…		…
534	{	675	{
535	int fd = fdchanges [i];	676	int fd = fdchanges [i];
536	ANFD *anfd = anfds + fd;	677	ANFD *anfd = anfds + fd;
537	ev_io *w;	678	ev_io *w;
538		679
539	int events = 0;	680	unsigned char events = 0;
540		681
541	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	682	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
542	events \|= w->events;	683	events \|= (unsigned char)w->events;
543		684
544	#if EV_SELECT_IS_WINSOCKET	685	#if EV_SELECT_IS_WINSOCKET
545	if (events)	686	if (events)
546	{	687	{
547	unsigned long argp;	688	unsigned long argp;
		689	#ifdef EV_FD_TO_WIN32_HANDLE
		690	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		691	#else
548	anfd->handle = _get_osfhandle (fd);	692	anfd->handle = _get_osfhandle (fd);
		693	#endif
549	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	694	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
550	}	695	}
551	#endif	696	#endif
552		697
		698	{
		699	unsigned char o_events = anfd->events;
		700	unsigned char o_reify = anfd->reify;
		701
553	anfd->reify = 0;	702	anfd->reify = 0;
554
555	backend_modify (EV_A_ fd, anfd->events, events);
556	anfd->events = events;	703	anfd->events = events;
		704
		705	if (o_events != events \|\| o_reify & EV_IOFDSET)
		706	backend_modify (EV_A_ fd, o_events, events);
		707	}
557	}	708	}
558		709
559	fdchangecnt = 0;	710	fdchangecnt = 0;
560	}	711	}
561		712
562	void inline_size	713	void inline_size
563	fd_change (EV_P_ int fd)	714	fd_change (EV_P_ int fd, int flags)
564	{	715	{
565	if (expect_false (anfds [fd].reify))	716	unsigned char reify = anfds [fd].reify;
566	return;
567
568	anfds [fd].reify = 1;	717	anfds [fd].reify \|= flags;
569		718
		719	if (expect_true (!reify))
		720	{
570	++fdchangecnt;	721	++fdchangecnt;
571	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	722	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
572	fdchanges [fdchangecnt - 1] = fd;	723	fdchanges [fdchangecnt - 1] = fd;
		724	}
573	}	725	}
574		726
575	void inline_speed	727	void inline_speed
576	fd_kill (EV_P_ int fd)	728	fd_kill (EV_P_ int fd)
577	{	729	{
…		…
628		780
629	for (fd = 0; fd < anfdmax; ++fd)	781	for (fd = 0; fd < anfdmax; ++fd)
630	if (anfds [fd].events)	782	if (anfds [fd].events)
631	{	783	{
632	anfds [fd].events = 0;	784	anfds [fd].events = 0;
633	fd_change (EV_A_ fd);	785	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
634	}	786	}
635	}	787	}
636		788
637	/*****************************************************************************/	789	/*****************************************************************************/
638		790
		791	/*
		792	* the heap functions want a real array index. array index 0 uis guaranteed to not
		793	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		794	* the branching factor of the d-tree.
		795	*/
		796
		797	/*
		798	* at the moment we allow libev the luxury of two heaps,
		799	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		800	* which is more cache-efficient.
		801	* the difference is about 5% with 50000+ watchers.
		802	*/
		803	#if EV_USE_4HEAP
		804
		805	#define DHEAP 4
		806	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		807
		808	/* towards the root */
639	void inline_speed	809	void inline_speed
640	upheap (WT *heap, int k)	810	upheap (ANHE *heap, int k)
641	{	811	{
642	WT w = heap [k];	812	ANHE he = heap [k];
643		813
644	while (k && heap [k >> 1]->at > w->at)	814	for (;;)
645	{	815	{
		816	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		817
		818	if (p == k \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		819	break;
		820
646	heap [k] = heap [k >> 1];	821	heap [k] = heap [p];
647	((W)heap [k])->active = k + 1;	822	ev_active (ANHE_w (heap [k])) = k;
648	k >>= 1;	823	k = p;
649	}	824	}
650		825
		826	ev_active (ANHE_w (he)) = k;
651	heap [k] = w;	827	heap [k] = he;
652	((W)heap [k])->active = k + 1;
653
654	}	828	}
655		829
		830	/* away from the root */
656	void inline_speed	831	void inline_speed
657	downheap (WT *heap, int N, int k)	832	downheap (ANHE *heap, int N, int k)
658	{	833	{
659	WT w = heap [k];	834	ANHE he = heap [k];
		835	ANHE *E = heap + N + HEAP0;
660		836
661	while (k < (N >> 1))	837	for (;;)
662	{	838	{
663	int j = k << 1;	839	ev_tstamp minat;
		840	ANHE *minpos;
		841	ANHE pos = heap + DHEAP (k - HEAP0) + HEAP0;
664		842
665	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	843	// find minimum child
		844	if (expect_true (pos + DHEAP - 1 < E))
666	++j;	845	{
667		846	/* fast path / (minpos = pos + 0), (minat = ANHE_at (minpos));
668	if (w->at <= heap [j]->at)	847	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else if (pos < E)
		852	{
		853	/* slow path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		854	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		855	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		856	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		857	}
		858	else
669	break;	859	break;
670		860
		861	if (ANHE_at (he) <= minat)
		862	break;
		863
		864	ev_active (ANHE_w (*minpos)) = k;
		865	heap [k] = *minpos;
		866
		867	k = minpos - heap;
		868	}
		869
		870	ev_active (ANHE_w (he)) = k;
		871	heap [k] = he;
		872	}
		873
		874	#else // 4HEAP
		875
		876	#define HEAP0 1
		877
		878	/* towards the root */
		879	void inline_speed
		880	upheap (ANHE *heap, int k)
		881	{
		882	ANHE he = heap [k];
		883
		884	for (;;)
		885	{
		886	int p = k >> 1;
		887
		888	/* maybe we could use a dummy element at heap [0]? */
		889	if (!p \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		890	break;
		891
671	heap [k] = heap [j];	892	heap [k] = heap [p];
672	((W)heap [k])->active = k + 1;	893	ev_active (ANHE_w (heap [k])) = k;
673	k = j;	894	k = p;
674	}	895	}
675		896
676	heap [k] = w;	897	heap [k] = he;
677	((W)heap [k])->active = k + 1;	898	ev_active (ANHE_w (heap [k])) = k;
678	}	899	}
		900
		901	/* away from the root */
		902	void inline_speed
		903	downheap (ANHE *heap, int N, int k)
		904	{
		905	ANHE he = heap [k];
		906
		907	for (;;)
		908	{
		909	int c = k << 1;
		910
		911	if (c > N)
		912	break;
		913
		914	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		915	? 1 : 0;
		916
		917	if (ANHE_at (he) <= ANHE_at (heap [c]))
		918	break;
		919
		920	heap [k] = heap [c];
		921	ev_active (ANHE_w (heap [k])) = k;
		922
		923	k = c;
		924	}
		925
		926	heap [k] = he;
		927	ev_active (ANHE_w (he)) = k;
		928	}
		929	#endif
679		930
680	void inline_size	931	void inline_size
681	adjustheap (WT *heap, int N, int k)	932	adjustheap (ANHE *heap, int N, int k)
682	{	933	{
683	upheap (heap, k);	934	upheap (heap, k);
684	downheap (heap, N, k);	935	downheap (heap, N, k);
685	}	936	}
686		937
687	/*****************************************************************************/	938	/*****************************************************************************/
688		939
689	typedef struct	940	typedef struct
690	{	941	{
691	WL head;	942	WL head;
692	sig_atomic_t volatile gotsig;	943	EV_ATOMIC_T gotsig;
693	} ANSIG;	944	} ANSIG;
694		945
695	static ANSIG *signals;	946	static ANSIG *signals;
696	static int signalmax;	947	static int signalmax;
697		948
698	static int sigpipe [2];	949	static EV_ATOMIC_T gotsig;
699	static sig_atomic_t volatile gotsig;
700	static ev_io sigev;
701		950
702	void inline_size	951	void inline_size
703	signals_init (ANSIG *base, int count)	952	signals_init (ANSIG *base, int count)
704	{	953	{
705	while (count--)	954	while (count--)
…		…
709		958
710	++base;	959	++base;
711	}	960	}
712	}	961	}
713		962
714	static void	963	/*****************************************************************************/
715	sighandler (int signum)
716	{
717	#if _WIN32
718	signal (signum, sighandler);
719	#endif
720
721	signals [signum - 1].gotsig = 1;
722
723	if (!gotsig)
724	{
725	int old_errno = errno;
726	gotsig = 1;
727	write (sigpipe [1], &signum, 1);
728	errno = old_errno;
729	}
730	}
731
732	void noinline
733	ev_feed_signal_event (EV_P_ int signum)
734	{
735	WL w;
736
737	#if EV_MULTIPLICITY
738	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
739	#endif
740
741	--signum;
742
743	if (signum < 0 \|\| signum >= signalmax)
744	return;
745
746	signals [signum].gotsig = 0;
747
748	for (w = signals [signum].head; w; w = w->next)
749	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
750	}
751
752	static void
753	sigcb (EV_P_ ev_io *iow, int revents)
754	{
755	int signum;
756
757	read (sigpipe [0], &revents, 1);
758	gotsig = 0;
759
760	for (signum = signalmax; signum--; )
761	if (signals [signum].gotsig)
762	ev_feed_signal_event (EV_A_ signum + 1);
763	}
764		964
765	void inline_speed	965	void inline_speed
766	fd_intern (int fd)	966	fd_intern (int fd)
767	{	967	{
768	#ifdef _WIN32	968	#ifdef _WIN32
…		…
773	fcntl (fd, F_SETFL, O_NONBLOCK);	973	fcntl (fd, F_SETFL, O_NONBLOCK);
774	#endif	974	#endif
775	}	975	}
776		976
777	static void noinline	977	static void noinline
778	siginit (EV_P)	978	evpipe_init (EV_P)
779	{	979	{
		980	if (!ev_is_active (&pipeev))
		981	{
		982	#if EV_USE_EVENTFD
		983	if ((evfd = eventfd (0, 0)) >= 0)
		984	{
		985	evpipe [0] = -1;
		986	fd_intern (evfd);
		987	ev_io_set (&pipeev, evfd, EV_READ);
		988	}
		989	else
		990	#endif
		991	{
		992	while (pipe (evpipe))
		993	syserr ("(libev) error creating signal/async pipe");
		994
780	fd_intern (sigpipe [0]);	995	fd_intern (evpipe [0]);
781	fd_intern (sigpipe [1]);	996	fd_intern (evpipe [1]);
		997	ev_io_set (&pipeev, evpipe [0], EV_READ);
		998	}
782		999
783	ev_io_set (&sigev, sigpipe [0], EV_READ);
784	ev_io_start (EV_A_ &sigev);	1000	ev_io_start (EV_A_ &pipeev);
785	ev_unref (EV_A); /* child watcher should not keep loop alive */	1001	ev_unref (EV_A); /* watcher should not keep loop alive */
		1002	}
		1003	}
		1004
		1005	void inline_size
		1006	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1007	{
		1008	if (!*flag)
		1009	{
		1010	int old_errno = errno; /* save errno because write might clobber it */
		1011
		1012	*flag = 1;
		1013
		1014	#if EV_USE_EVENTFD
		1015	if (evfd >= 0)
		1016	{
		1017	uint64_t counter = 1;
		1018	write (evfd, &counter, sizeof (uint64_t));
		1019	}
		1020	else
		1021	#endif
		1022	write (evpipe [1], &old_errno, 1);
		1023
		1024	errno = old_errno;
		1025	}
		1026	}
		1027
		1028	static void
		1029	pipecb (EV_P_ ev_io *iow, int revents)
		1030	{
		1031	#if EV_USE_EVENTFD
		1032	if (evfd >= 0)
		1033	{
		1034	uint64_t counter;
		1035	read (evfd, &counter, sizeof (uint64_t));
		1036	}
		1037	else
		1038	#endif
		1039	{
		1040	char dummy;
		1041	read (evpipe [0], &dummy, 1);
		1042	}
		1043
		1044	if (gotsig && ev_is_default_loop (EV_A))
		1045	{
		1046	int signum;
		1047	gotsig = 0;
		1048
		1049	for (signum = signalmax; signum--; )
		1050	if (signals [signum].gotsig)
		1051	ev_feed_signal_event (EV_A_ signum + 1);
		1052	}
		1053
		1054	#if EV_ASYNC_ENABLE
		1055	if (gotasync)
		1056	{
		1057	int i;
		1058	gotasync = 0;
		1059
		1060	for (i = asynccnt; i--; )
		1061	if (asyncs [i]->sent)
		1062	{
		1063	asyncs [i]->sent = 0;
		1064	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1065	}
		1066	}
		1067	#endif
786	}	1068	}
787		1069
788	/*****************************************************************************/	1070	/*****************************************************************************/
789		1071
		1072	static void
		1073	ev_sighandler (int signum)
		1074	{
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *loop = &default_loop_struct;
		1077	#endif
		1078
		1079	#if _WIN32
		1080	signal (signum, ev_sighandler);
		1081	#endif
		1082
		1083	signals [signum - 1].gotsig = 1;
		1084	evpipe_write (EV_A_ &gotsig);
		1085	}
		1086
		1087	void noinline
		1088	ev_feed_signal_event (EV_P_ int signum)
		1089	{
		1090	WL w;
		1091
		1092	#if EV_MULTIPLICITY
		1093	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1094	#endif
		1095
		1096	--signum;
		1097
		1098	if (signum < 0 \|\| signum >= signalmax)
		1099	return;
		1100
		1101	signals [signum].gotsig = 0;
		1102
		1103	for (w = signals [signum].head; w; w = w->next)
		1104	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1105	}
		1106
		1107	/*****************************************************************************/
		1108
790	static ev_child *childs [EV_PID_HASHSIZE];	1109	static WL childs [EV_PID_HASHSIZE];
791		1110
792	#ifndef _WIN32	1111	#ifndef _WIN32
793		1112
794	static ev_signal childev;	1113	static ev_signal childev;
795		1114
		1115	#ifndef WIFCONTINUED
		1116	# define WIFCONTINUED(status) 0
		1117	#endif
		1118
796	void inline_speed	1119	void inline_speed
797	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1120	child_reap (EV_P_ int chain, int pid, int status)
798	{	1121	{
799	ev_child *w;	1122	ev_child *w;
		1123	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
800		1124
801	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1125	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1126	{
802	if (w->pid == pid \|\| !w->pid)	1127	if ((w->pid == pid \|\| !w->pid)
		1128	&& (!traced \|\| (w->flags & 1)))
803	{	1129	{
804	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	1130	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
805	w->rpid = pid;	1131	w->rpid = pid;
806	w->rstatus = status;	1132	w->rstatus = status;
807	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1133	ev_feed_event (EV_A_ (W)w, EV_CHILD);
808	}	1134	}
		1135	}
809	}	1136	}
810		1137
811	#ifndef WCONTINUED	1138	#ifndef WCONTINUED
812	# define WCONTINUED 0	1139	# define WCONTINUED 0
813	#endif	1140	#endif
…		…
822	if (!WCONTINUED	1149	if (!WCONTINUED
823	\|\| errno != EINVAL	1150	\|\| errno != EINVAL
824	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))	1151	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
825	return;	1152	return;
826		1153
827	/* make sure we are called again until all childs have been reaped */	1154	/* make sure we are called again until all children have been reaped */
828	/* we need to do it this way so that the callback gets called before we continue */	1155	/* we need to do it this way so that the callback gets called before we continue */
829	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1156	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
830		1157
831	child_reap (EV_A_ sw, pid, pid, status);	1158	child_reap (EV_A_ pid, pid, status);
832	if (EV_PID_HASHSIZE > 1)	1159	if (EV_PID_HASHSIZE > 1)
833	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1160	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
834	}	1161	}
835		1162
836	#endif	1163	#endif
837		1164
838	/*****************************************************************************/	1165	/*****************************************************************************/
…		…
910	}	1237	}
911		1238
912	unsigned int	1239	unsigned int
913	ev_embeddable_backends (void)	1240	ev_embeddable_backends (void)
914	{	1241	{
915	return EVBACKEND_EPOLL	1242	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
916	\| EVBACKEND_KQUEUE	1243
917	\| EVBACKEND_PORT;	1244	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1245	/* please fix it and tell me how to detect the fix */
		1246	flags &= ~EVBACKEND_EPOLL;
		1247
		1248	return flags;
918	}	1249	}
919		1250
920	unsigned int	1251	unsigned int
921	ev_backend (EV_P)	1252	ev_backend (EV_P)
922	{	1253	{
…		…
925		1256
926	unsigned int	1257	unsigned int
927	ev_loop_count (EV_P)	1258	ev_loop_count (EV_P)
928	{	1259	{
929	return loop_count;	1260	return loop_count;
		1261	}
		1262
		1263	void
		1264	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	io_blocktime = interval;
		1267	}
		1268
		1269	void
		1270	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1271	{
		1272	timeout_blocktime = interval;
930	}	1273	}
931		1274
932	static void noinline	1275	static void noinline
933	loop_init (EV_P_ unsigned int flags)	1276	loop_init (EV_P_ unsigned int flags)
934	{	1277	{
…		…
940	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1283	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
941	have_monotonic = 1;	1284	have_monotonic = 1;
942	}	1285	}
943	#endif	1286	#endif
944		1287
945	ev_rt_now = ev_time ();	1288	ev_rt_now = ev_time ();
946	mn_now = get_clock ();	1289	mn_now = get_clock ();
947	now_floor = mn_now;	1290	now_floor = mn_now;
948	rtmn_diff = ev_rt_now - mn_now;	1291	rtmn_diff = ev_rt_now - mn_now;
		1292
		1293	io_blocktime = 0.;
		1294	timeout_blocktime = 0.;
		1295	backend = 0;
		1296	backend_fd = -1;
		1297	gotasync = 0;
		1298	#if EV_USE_INOTIFY
		1299	fs_fd = -2;
		1300	#endif
949		1301
950	/* pid check not overridable via env */	1302	/* pid check not overridable via env */
951	#ifndef _WIN32	1303	#ifndef _WIN32
952	if (flags & EVFLAG_FORKCHECK)	1304	if (flags & EVFLAG_FORKCHECK)
953	curpid = getpid ();	1305	curpid = getpid ();
…		…
956	if (!(flags & EVFLAG_NOENV)	1308	if (!(flags & EVFLAG_NOENV)
957	&& !enable_secure ()	1309	&& !enable_secure ()
958	&& getenv ("LIBEV_FLAGS"))	1310	&& getenv ("LIBEV_FLAGS"))
959	flags = atoi (getenv ("LIBEV_FLAGS"));	1311	flags = atoi (getenv ("LIBEV_FLAGS"));
960		1312
961	if (!(flags & 0x0000ffffUL))	1313	if (!(flags & 0x0000ffffU))
962	flags \|= ev_recommended_backends ();	1314	flags \|= ev_recommended_backends ();
963
964	backend = 0;
965	backend_fd = -1;
966	#if EV_USE_INOTIFY
967	fs_fd = -2;
968	#endif
969		1315
970	#if EV_USE_PORT	1316	#if EV_USE_PORT
971	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1317	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
972	#endif	1318	#endif
973	#if EV_USE_KQUEUE	1319	#if EV_USE_KQUEUE
…		…
981	#endif	1327	#endif
982	#if EV_USE_SELECT	1328	#if EV_USE_SELECT
983	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1329	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
984	#endif	1330	#endif
985		1331
986	ev_init (&sigev, sigcb);	1332	ev_init (&pipeev, pipecb);
987	ev_set_priority (&sigev, EV_MAXPRI);	1333	ev_set_priority (&pipeev, EV_MAXPRI);
988	}	1334	}
989	}	1335	}
990		1336
991	static void noinline	1337	static void noinline
992	loop_destroy (EV_P)	1338	loop_destroy (EV_P)
993	{	1339	{
994	int i;	1340	int i;
		1341
		1342	if (ev_is_active (&pipeev))
		1343	{
		1344	ev_ref (EV_A); /* signal watcher */
		1345	ev_io_stop (EV_A_ &pipeev);
		1346
		1347	#if EV_USE_EVENTFD
		1348	if (evfd >= 0)
		1349	close (evfd);
		1350	#endif
		1351
		1352	if (evpipe [0] >= 0)
		1353	{
		1354	close (evpipe [0]);
		1355	close (evpipe [1]);
		1356	}
		1357	}
995		1358
996	#if EV_USE_INOTIFY	1359	#if EV_USE_INOTIFY
997	if (fs_fd >= 0)	1360	if (fs_fd >= 0)
998	close (fs_fd);	1361	close (fs_fd);
999	#endif	1362	#endif
…		…
1022	array_free (pending, [i]);	1385	array_free (pending, [i]);
1023	#if EV_IDLE_ENABLE	1386	#if EV_IDLE_ENABLE
1024	array_free (idle, [i]);	1387	array_free (idle, [i]);
1025	#endif	1388	#endif
1026	}	1389	}
		1390
		1391	ev_free (anfds); anfdmax = 0;
1027		1392
1028	/* have to use the microsoft-never-gets-it-right macro */	1393	/* have to use the microsoft-never-gets-it-right macro */
1029	array_free (fdchange, EMPTY);	1394	array_free (fdchange, EMPTY);
1030	array_free (timer, EMPTY);	1395	array_free (timer, EMPTY);
1031	#if EV_PERIODIC_ENABLE	1396	#if EV_PERIODIC_ENABLE
1032	array_free (periodic, EMPTY);	1397	array_free (periodic, EMPTY);
1033	#endif	1398	#endif
		1399	#if EV_FORK_ENABLE
		1400	array_free (fork, EMPTY);
		1401	#endif
1034	array_free (prepare, EMPTY);	1402	array_free (prepare, EMPTY);
1035	array_free (check, EMPTY);	1403	array_free (check, EMPTY);
		1404	#if EV_ASYNC_ENABLE
		1405	array_free (async, EMPTY);
		1406	#endif
1036		1407
1037	backend = 0;	1408	backend = 0;
1038	}	1409	}
1039		1410
		1411	#if EV_USE_INOTIFY
1040	void inline_size infy_fork (EV_P);	1412	void inline_size infy_fork (EV_P);
		1413	#endif
1041		1414
1042	void inline_size	1415	void inline_size
1043	loop_fork (EV_P)	1416	loop_fork (EV_P)
1044	{	1417	{
1045	#if EV_USE_PORT	1418	#if EV_USE_PORT
…		…
1053	#endif	1426	#endif
1054	#if EV_USE_INOTIFY	1427	#if EV_USE_INOTIFY
1055	infy_fork (EV_A);	1428	infy_fork (EV_A);
1056	#endif	1429	#endif
1057		1430
1058	if (ev_is_active (&sigev))	1431	if (ev_is_active (&pipeev))
1059	{	1432	{
1060	/* default loop */	1433	/* this "locks" the handlers against writing to the pipe */
		1434	/* while we modify the fd vars */
		1435	gotsig = 1;
		1436	#if EV_ASYNC_ENABLE
		1437	gotasync = 1;
		1438	#endif
1061		1439
1062	ev_ref (EV_A);	1440	ev_ref (EV_A);
1063	ev_io_stop (EV_A_ &sigev);	1441	ev_io_stop (EV_A_ &pipeev);
		1442
		1443	#if EV_USE_EVENTFD
		1444	if (evfd >= 0)
		1445	close (evfd);
		1446	#endif
		1447
		1448	if (evpipe [0] >= 0)
		1449	{
1064	close (sigpipe [0]);	1450	close (evpipe [0]);
1065	close (sigpipe [1]);	1451	close (evpipe [1]);
		1452	}
1066		1453
1067	while (pipe (sigpipe))
1068	syserr ("(libev) error creating pipe");
1069
1070	siginit (EV_A);	1454	evpipe_init (EV_A);
		1455	/* now iterate over everything, in case we missed something */
		1456	pipecb (EV_A_ &pipeev, EV_READ);
1071	}	1457	}
1072		1458
1073	postfork = 0;	1459	postfork = 0;
1074	}	1460	}
1075		1461
…		…
1097	}	1483	}
1098		1484
1099	void	1485	void
1100	ev_loop_fork (EV_P)	1486	ev_loop_fork (EV_P)
1101	{	1487	{
1102	postfork = 1;	1488	postfork = 1; /* must be in line with ev_default_fork */
1103	}	1489	}
1104
1105	#endif	1490	#endif
1106		1491
1107	#if EV_MULTIPLICITY	1492	#if EV_MULTIPLICITY
1108	struct ev_loop *	1493	struct ev_loop *
1109	ev_default_loop_init (unsigned int flags)	1494	ev_default_loop_init (unsigned int flags)
1110	#else	1495	#else
1111	int	1496	int
1112	ev_default_loop (unsigned int flags)	1497	ev_default_loop (unsigned int flags)
1113	#endif	1498	#endif
1114	{	1499	{
1115	if (sigpipe [0] == sigpipe [1])
1116	if (pipe (sigpipe))
1117	return 0;
1118
1119	if (!ev_default_loop_ptr)	1500	if (!ev_default_loop_ptr)
1120	{	1501	{
1121	#if EV_MULTIPLICITY	1502	#if EV_MULTIPLICITY
1122	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1503	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1123	#else	1504	#else
…		…
1126		1507
1127	loop_init (EV_A_ flags);	1508	loop_init (EV_A_ flags);
1128		1509
1129	if (ev_backend (EV_A))	1510	if (ev_backend (EV_A))
1130	{	1511	{
1131	siginit (EV_A);
1132
1133	#ifndef _WIN32	1512	#ifndef _WIN32
1134	ev_signal_init (&childev, childcb, SIGCHLD);	1513	ev_signal_init (&childev, childcb, SIGCHLD);
1135	ev_set_priority (&childev, EV_MAXPRI);	1514	ev_set_priority (&childev, EV_MAXPRI);
1136	ev_signal_start (EV_A_ &childev);	1515	ev_signal_start (EV_A_ &childev);
1137	ev_unref (EV_A); /* child watcher should not keep loop alive */	1516	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1154	#ifndef _WIN32	1533	#ifndef _WIN32
1155	ev_ref (EV_A); /* child watcher */	1534	ev_ref (EV_A); /* child watcher */
1156	ev_signal_stop (EV_A_ &childev);	1535	ev_signal_stop (EV_A_ &childev);
1157	#endif	1536	#endif
1158		1537
1159	ev_ref (EV_A); /* signal watcher */
1160	ev_io_stop (EV_A_ &sigev);
1161
1162	close (sigpipe [0]); sigpipe [0] = 0;
1163	close (sigpipe [1]); sigpipe [1] = 0;
1164
1165	loop_destroy (EV_A);	1538	loop_destroy (EV_A);
1166	}	1539	}
1167		1540
1168	void	1541	void
1169	ev_default_fork (void)	1542	ev_default_fork (void)
…		…
1171	#if EV_MULTIPLICITY	1544	#if EV_MULTIPLICITY
1172	struct ev_loop *loop = ev_default_loop_ptr;	1545	struct ev_loop *loop = ev_default_loop_ptr;
1173	#endif	1546	#endif
1174		1547
1175	if (backend)	1548	if (backend)
1176	postfork = 1;	1549	postfork = 1; /* must be in line with ev_loop_fork */
1177	}	1550	}
1178		1551
1179	/*****************************************************************************/	1552	/*****************************************************************************/
1180		1553
1181	void	1554	void
…		…
1201	p->w->pending = 0;	1574	p->w->pending = 0;
1202	EV_CB_INVOKE (p->w, p->events);	1575	EV_CB_INVOKE (p->w, p->events);
1203	}	1576	}
1204	}	1577	}
1205	}	1578	}
1206
1207	void inline_size
1208	timers_reify (EV_P)
1209	{
1210	while (timercnt && ((WT)timers [0])->at <= mn_now)
1211	{
1212	ev_timer *w = timers [0];
1213
1214	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
1215
1216	/* first reschedule or stop timer */
1217	if (w->repeat)
1218	{
1219	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1220
1221	((WT)w)->at += w->repeat;
1222	if (((WT)w)->at < mn_now)
1223	((WT)w)->at = mn_now;
1224
1225	downheap ((WT *)timers, timercnt, 0);
1226	}
1227	else
1228	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1229
1230	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1231	}
1232	}
1233
1234	#if EV_PERIODIC_ENABLE
1235	void inline_size
1236	periodics_reify (EV_P)
1237	{
1238	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1239	{
1240	ev_periodic *w = periodics [0];
1241
1242	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
1243
1244	/* first reschedule or stop timer */
1245	if (w->reschedule_cb)
1246	{
1247	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1248	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1249	downheap ((WT *)periodics, periodiccnt, 0);
1250	}
1251	else if (w->interval)
1252	{
1253	((WT)w)->at = w->offset + floor ((ev_rt_now + TIME_EPSILON - w->offset) / w->interval + 1.) * w->interval;
1254	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1255	downheap ((WT *)periodics, periodiccnt, 0);
1256	}
1257	else
1258	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1259
1260	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1261	}
1262	}
1263
1264	static void noinline
1265	periodics_reschedule (EV_P)
1266	{
1267	int i;
1268
1269	/* adjust periodics after time jump */
1270	for (i = 0; i < periodiccnt; ++i)
1271	{
1272	ev_periodic *w = periodics [i];
1273
1274	if (w->reschedule_cb)
1275	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1276	else if (w->interval)
1277	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1278	}
1279
1280	/* now rebuild the heap */
1281	for (i = periodiccnt >> 1; i--; )
1282	downheap ((WT *)periodics, periodiccnt, i);
1283	}
1284	#endif
1285		1579
1286	#if EV_IDLE_ENABLE	1580	#if EV_IDLE_ENABLE
1287	void inline_size	1581	void inline_size
1288	idle_reify (EV_P)	1582	idle_reify (EV_P)
1289	{	1583	{
…		…
1304	}	1598	}
1305	}	1599	}
1306	}	1600	}
1307	#endif	1601	#endif
1308		1602
1309	int inline_size	1603	void inline_size
1310	time_update_monotonic (EV_P)	1604	timers_reify (EV_P)
1311	{	1605	{
		1606	while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
		1607	{
		1608	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
		1609
		1610	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
		1611
		1612	/* first reschedule or stop timer */
		1613	if (w->repeat)
		1614	{
		1615	ev_at (w) += w->repeat;
		1616	if (ev_at (w) < mn_now)
		1617	ev_at (w) = mn_now;
		1618
		1619	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1620
		1621	ANHE_at_set (timers [HEAP0]);
		1622	downheap (timers, timercnt, HEAP0);
		1623	}
		1624	else
		1625	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1626
		1627	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1628	}
		1629	}
		1630
		1631	#if EV_PERIODIC_ENABLE
		1632	void inline_size
		1633	periodics_reify (EV_P)
		1634	{
		1635	while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
		1636	{
		1637	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		1638
		1639	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
		1640
		1641	/* first reschedule or stop timer */
		1642	if (w->reschedule_cb)
		1643	{
		1644	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1645
		1646	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1647
		1648	ANHE_at_set (periodics [HEAP0]);
		1649	downheap (periodics, periodiccnt, HEAP0);
		1650	}
		1651	else if (w->interval)
		1652	{
		1653	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1654	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1655
		1656	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1657
		1658	ANHE_at_set (periodics [HEAP0]);
		1659	downheap (periodics, periodiccnt, HEAP0);
		1660	}
		1661	else
		1662	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1663
		1664	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1665	}
		1666	}
		1667
		1668	static void noinline
		1669	periodics_reschedule (EV_P)
		1670	{
		1671	int i;
		1672
		1673	/* adjust periodics after time jump */
		1674	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1675	{
		1676	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
		1677
		1678	if (w->reschedule_cb)
		1679	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1680	else if (w->interval)
		1681	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1682
		1683	ANHE_at_set (periodics [i]);
		1684	}
		1685
		1686	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1687	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
		1688	for (i = 0; i < periodiccnt; ++i)
		1689	upheap (periodics, i + HEAP0);
		1690	}
		1691	#endif
		1692
		1693	void inline_speed
		1694	time_update (EV_P_ ev_tstamp max_block)
		1695	{
		1696	int i;
		1697
		1698	#if EV_USE_MONOTONIC
		1699	if (expect_true (have_monotonic))
		1700	{
		1701	ev_tstamp odiff = rtmn_diff;
		1702
1312	mn_now = get_clock ();	1703	mn_now = get_clock ();
1313		1704
		1705	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1706	/* interpolate in the meantime */
1314	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1707	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1315	{	1708	{
1316	ev_rt_now = rtmn_diff + mn_now;	1709	ev_rt_now = rtmn_diff + mn_now;
1317	return 0;	1710	return;
1318	}	1711	}
1319	else	1712
1320	{
1321	now_floor = mn_now;	1713	now_floor = mn_now;
1322	ev_rt_now = ev_time ();	1714	ev_rt_now = ev_time ();
1323	return 1;
1324	}
1325	}
1326		1715
1327	void inline_size	1716	/* loop a few times, before making important decisions.
1328	time_update (EV_P)	1717	* on the choice of "4": one iteration isn't enough,
1329	{	1718	* in case we get preempted during the calls to
1330	int i;	1719	* ev_time and get_clock. a second call is almost guaranteed
1331		1720	* to succeed in that case, though. and looping a few more times
1332	#if EV_USE_MONOTONIC	1721	* doesn't hurt either as we only do this on time-jumps or
1333	if (expect_true (have_monotonic))	1722	* in the unlikely event of having been preempted here.
1334	{	1723	*/
1335	if (time_update_monotonic (EV_A))	1724	for (i = 4; --i; )
1336	{	1725	{
1337	ev_tstamp odiff = rtmn_diff;
1338
1339	/* loop a few times, before making important decisions.
1340	* on the choice of "4": one iteration isn't enough,
1341	* in case we get preempted during the calls to
1342	* ev_time and get_clock. a second call is almost guaranteed
1343	* to succeed in that case, though. and looping a few more times
1344	* doesn't hurt either as we only do this on time-jumps or
1345	* in the unlikely event of having been preempted here.
1346	*/
1347	for (i = 4; --i; )
1348	{
1349	rtmn_diff = ev_rt_now - mn_now;	1726	rtmn_diff = ev_rt_now - mn_now;
1350		1727
1351	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1728	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1352	return; /* all is well */	1729	return; /* all is well */
1353		1730
1354	ev_rt_now = ev_time ();	1731	ev_rt_now = ev_time ();
1355	mn_now = get_clock ();	1732	mn_now = get_clock ();
1356	now_floor = mn_now;	1733	now_floor = mn_now;
1357	}	1734	}
1358		1735
1359	# if EV_PERIODIC_ENABLE	1736	# if EV_PERIODIC_ENABLE
1360	periodics_reschedule (EV_A);	1737	periodics_reschedule (EV_A);
1361	# endif	1738	# endif
1362	/* no timer adjustment, as the monotonic clock doesn't jump */	1739	/* no timer adjustment, as the monotonic clock doesn't jump */
1363	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1740	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1364	}
1365	}	1741	}
1366	else	1742	else
1367	#endif	1743	#endif
1368	{	1744	{
1369	ev_rt_now = ev_time ();	1745	ev_rt_now = ev_time ();
1370		1746
1371	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1747	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1372	{	1748	{
1373	#if EV_PERIODIC_ENABLE	1749	#if EV_PERIODIC_ENABLE
1374	periodics_reschedule (EV_A);	1750	periodics_reschedule (EV_A);
1375	#endif	1751	#endif
1376
1377	/* adjust timers. this is easy, as the offset is the same for all of them */	1752	/* adjust timers. this is easy, as the offset is the same for all of them */
1378	for (i = 0; i < timercnt; ++i)	1753	for (i = 0; i < timercnt; ++i)
		1754	{
		1755	ANHE *he = timers + i + HEAP0;
1379	((WT)timers [i])->at += ev_rt_now - mn_now;	1756	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1757	ANHE_at_set (*he);
		1758	}
1380	}	1759	}
1381		1760
1382	mn_now = ev_rt_now;	1761	mn_now = ev_rt_now;
1383	}	1762	}
1384	}	1763	}
…		…
1398	static int loop_done;	1777	static int loop_done;
1399		1778
1400	void	1779	void
1401	ev_loop (EV_P_ int flags)	1780	ev_loop (EV_P_ int flags)
1402	{	1781	{
1403	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1782	loop_done = EVUNLOOP_CANCEL;
1404	? EVUNLOOP_ONE
1405	: EVUNLOOP_CANCEL;
1406		1783
1407	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1784	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1408		1785
1409	do	1786	do
1410	{	1787	{
…		…
1444	/* update fd-related kernel structures */	1821	/* update fd-related kernel structures */
1445	fd_reify (EV_A);	1822	fd_reify (EV_A);
1446		1823
1447	/* calculate blocking time */	1824	/* calculate blocking time */
1448	{	1825	{
1449	ev_tstamp block;	1826	ev_tstamp waittime = 0.;
		1827	ev_tstamp sleeptime = 0.;
1450		1828
1451	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1829	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1452	block = 0.; /* do not block at all */
1453	else
1454	{	1830	{
1455	/* update time to cancel out callback processing overhead */	1831	/* update time to cancel out callback processing overhead */
1456	#if EV_USE_MONOTONIC
1457	if (expect_true (have_monotonic))
1458	time_update_monotonic (EV_A);	1832	time_update (EV_A_ 1e100);
1459	else
1460	#endif
1461	{
1462	ev_rt_now = ev_time ();
1463	mn_now = ev_rt_now;
1464	}
1465		1833
1466	block = MAX_BLOCKTIME;	1834	waittime = MAX_BLOCKTIME;
1467		1835
1468	if (timercnt)	1836	if (timercnt)
1469	{	1837	{
1470	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1838	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1471	if (block > to) block = to;	1839	if (waittime > to) waittime = to;
1472	}	1840	}
1473		1841
1474	#if EV_PERIODIC_ENABLE	1842	#if EV_PERIODIC_ENABLE
1475	if (periodiccnt)	1843	if (periodiccnt)
1476	{	1844	{
1477	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1845	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1478	if (block > to) block = to;	1846	if (waittime > to) waittime = to;
1479	}	1847	}
1480	#endif	1848	#endif
1481		1849
1482	if (expect_false (block < 0.)) block = 0.;	1850	if (expect_false (waittime < timeout_blocktime))
		1851	waittime = timeout_blocktime;
		1852
		1853	sleeptime = waittime - backend_fudge;
		1854
		1855	if (expect_true (sleeptime > io_blocktime))
		1856	sleeptime = io_blocktime;
		1857
		1858	if (sleeptime)
		1859	{
		1860	ev_sleep (sleeptime);
		1861	waittime -= sleeptime;
		1862	}
1483	}	1863	}
1484		1864
1485	++loop_count;	1865	++loop_count;
1486	backend_poll (EV_A_ block);	1866	backend_poll (EV_A_ waittime);
		1867
		1868	/* update ev_rt_now, do magic */
		1869	time_update (EV_A_ waittime + sleeptime);
1487	}	1870	}
1488
1489	/* update ev_rt_now, do magic */
1490	time_update (EV_A);
1491		1871
1492	/* queue pending timers and reschedule them */	1872	/* queue pending timers and reschedule them */
1493	timers_reify (EV_A); /* relative timers called last */	1873	timers_reify (EV_A); /* relative timers called last */
1494	#if EV_PERIODIC_ENABLE	1874	#if EV_PERIODIC_ENABLE
1495	periodics_reify (EV_A); /* absolute timers called first */	1875	periodics_reify (EV_A); /* absolute timers called first */
…		…
1503	/* queue check watchers, to be executed first */	1883	/* queue check watchers, to be executed first */
1504	if (expect_false (checkcnt))	1884	if (expect_false (checkcnt))
1505	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1885	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1506		1886
1507	call_pending (EV_A);	1887	call_pending (EV_A);
1508
1509	}	1888	}
1510	while (expect_true (activecnt && !loop_done));	1889	while (expect_true (
		1890	activecnt
		1891	&& !loop_done
		1892	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1893	));
1511		1894
1512	if (loop_done == EVUNLOOP_ONE)	1895	if (loop_done == EVUNLOOP_ONE)
1513	loop_done = EVUNLOOP_CANCEL;	1896	loop_done = EVUNLOOP_CANCEL;
1514	}	1897	}
1515		1898
…		…
1606		1989
1607	assert (("ev_io_start called with negative fd", fd >= 0));	1990	assert (("ev_io_start called with negative fd", fd >= 0));
1608		1991
1609	ev_start (EV_A_ (W)w, 1);	1992	ev_start (EV_A_ (W)w, 1);
1610	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1993	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1611	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1994	wlist_add (&anfds[fd].head, (WL)w);
1612		1995
1613	fd_change (EV_A_ fd);	1996	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		1997	w->events &= ~EV_IOFDSET;
1614	}	1998	}
1615		1999
1616	void noinline	2000	void noinline
1617	ev_io_stop (EV_P_ ev_io *w)	2001	ev_io_stop (EV_P_ ev_io *w)
1618	{	2002	{
1619	clear_pending (EV_A_ (W)w);	2003	clear_pending (EV_A_ (W)w);
1620	if (expect_false (!ev_is_active (w)))	2004	if (expect_false (!ev_is_active (w)))
1621	return;	2005	return;
1622		2006
1623	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2007	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1624		2008
1625	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2009	wlist_del (&anfds[w->fd].head, (WL)w);
1626	ev_stop (EV_A_ (W)w);	2010	ev_stop (EV_A_ (W)w);
1627		2011
1628	fd_change (EV_A_ w->fd);	2012	fd_change (EV_A_ w->fd, 1);
1629	}	2013	}
1630		2014
1631	void noinline	2015	void noinline
1632	ev_timer_start (EV_P_ ev_timer *w)	2016	ev_timer_start (EV_P_ ev_timer *w)
1633	{	2017	{
1634	if (expect_false (ev_is_active (w)))	2018	if (expect_false (ev_is_active (w)))
1635	return;	2019	return;
1636		2020
1637	((WT)w)->at += mn_now;	2021	ev_at (w) += mn_now;
1638		2022
1639	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2023	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1640		2024
1641	ev_start (EV_A_ (W)w, ++timercnt);	2025	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1642	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	2026	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1643	timers [timercnt - 1] = w;	2027	ANHE_w (timers [ev_active (w)]) = (WT)w;
1644	upheap ((WT *)timers, timercnt - 1);	2028	ANHE_at_set (timers [ev_active (w)]);
		2029	upheap (timers, ev_active (w));
1645		2030
1646	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/	2031	/assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
1647	}	2032	}
1648		2033
1649	void noinline	2034	void noinline
1650	ev_timer_stop (EV_P_ ev_timer *w)	2035	ev_timer_stop (EV_P_ ev_timer *w)
1651	{	2036	{
1652	clear_pending (EV_A_ (W)w);	2037	clear_pending (EV_A_ (W)w);
1653	if (expect_false (!ev_is_active (w)))	2038	if (expect_false (!ev_is_active (w)))
1654	return;	2039	return;
1655		2040
1656	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1657
1658	{	2041	{
1659	int active = ((W)w)->active;	2042	int active = ev_active (w);
1660		2043
		2044	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2045
1661	if (expect_true (--active < --timercnt))	2046	if (expect_true (active < timercnt + HEAP0 - 1))
1662	{	2047	{
1663	timers [active] = timers [timercnt];	2048	timers [active] = timers [timercnt + HEAP0 - 1];
1664	adjustheap ((WT *)timers, timercnt, active);	2049	adjustheap (timers, timercnt, active);
1665	}	2050	}
		2051
		2052	--timercnt;
1666	}	2053	}
1667		2054
1668	((WT)w)->at -= mn_now;	2055	ev_at (w) -= mn_now;
1669		2056
1670	ev_stop (EV_A_ (W)w);	2057	ev_stop (EV_A_ (W)w);
1671	}	2058	}
1672		2059
1673	void noinline	2060	void noinline
…		…
1675	{	2062	{
1676	if (ev_is_active (w))	2063	if (ev_is_active (w))
1677	{	2064	{
1678	if (w->repeat)	2065	if (w->repeat)
1679	{	2066	{
1680	((WT)w)->at = mn_now + w->repeat;	2067	ev_at (w) = mn_now + w->repeat;
		2068	ANHE_at_set (timers [ev_active (w)]);
1681	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2069	adjustheap (timers, timercnt, ev_active (w));
1682	}	2070	}
1683	else	2071	else
1684	ev_timer_stop (EV_A_ w);	2072	ev_timer_stop (EV_A_ w);
1685	}	2073	}
1686	else if (w->repeat)	2074	else if (w->repeat)
1687	{	2075	{
1688	w->at = w->repeat;	2076	ev_at (w) = w->repeat;
1689	ev_timer_start (EV_A_ w);	2077	ev_timer_start (EV_A_ w);
1690	}	2078	}
1691	}	2079	}
1692		2080
1693	#if EV_PERIODIC_ENABLE	2081	#if EV_PERIODIC_ENABLE
…		…
1696	{	2084	{
1697	if (expect_false (ev_is_active (w)))	2085	if (expect_false (ev_is_active (w)))
1698	return;	2086	return;
1699		2087
1700	if (w->reschedule_cb)	2088	if (w->reschedule_cb)
1701	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2089	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1702	else if (w->interval)	2090	else if (w->interval)
1703	{	2091	{
1704	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2092	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1705	/* this formula differs from the one in periodic_reify because we do not always round up */	2093	/* this formula differs from the one in periodic_reify because we do not always round up */
1706	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2094	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1707	}	2095	}
1708	else	2096	else
1709	((WT)w)->at = w->offset;	2097	ev_at (w) = w->offset;
1710		2098
1711	ev_start (EV_A_ (W)w, ++periodiccnt);	2099	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1712	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2100	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1713	periodics [periodiccnt - 1] = w;	2101	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1714	upheap ((WT *)periodics, periodiccnt - 1);	2102	ANHE_at_set (periodics [ev_active (w)]);
		2103	upheap (periodics, ev_active (w));
1715		2104
1716	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/	2105	/assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
1717	}	2106	}
1718		2107
1719	void noinline	2108	void noinline
1720	ev_periodic_stop (EV_P_ ev_periodic *w)	2109	ev_periodic_stop (EV_P_ ev_periodic *w)
1721	{	2110	{
1722	clear_pending (EV_A_ (W)w);	2111	clear_pending (EV_A_ (W)w);
1723	if (expect_false (!ev_is_active (w)))	2112	if (expect_false (!ev_is_active (w)))
1724	return;	2113	return;
1725		2114
1726	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1727
1728	{	2115	{
1729	int active = ((W)w)->active;	2116	int active = ev_active (w);
1730		2117
		2118	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2119
1731	if (expect_true (--active < --periodiccnt))	2120	if (expect_true (active < periodiccnt + HEAP0 - 1))
1732	{	2121	{
1733	periodics [active] = periodics [periodiccnt];	2122	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1734	adjustheap ((WT *)periodics, periodiccnt, active);	2123	adjustheap (periodics, periodiccnt, active);
1735	}	2124	}
		2125
		2126	--periodiccnt;
1736	}	2127	}
1737		2128
1738	ev_stop (EV_A_ (W)w);	2129	ev_stop (EV_A_ (W)w);
1739	}	2130	}
1740		2131
…		…
1760	if (expect_false (ev_is_active (w)))	2151	if (expect_false (ev_is_active (w)))
1761	return;	2152	return;
1762		2153
1763	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2154	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1764		2155
		2156	evpipe_init (EV_A);
		2157
		2158	{
		2159	#ifndef _WIN32
		2160	sigset_t full, prev;
		2161	sigfillset (&full);
		2162	sigprocmask (SIG_SETMASK, &full, &prev);
		2163	#endif
		2164
		2165	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2166
		2167	#ifndef _WIN32
		2168	sigprocmask (SIG_SETMASK, &prev, 0);
		2169	#endif
		2170	}
		2171
1765	ev_start (EV_A_ (W)w, 1);	2172	ev_start (EV_A_ (W)w, 1);
1766	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1767	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2173	wlist_add (&signals [w->signum - 1].head, (WL)w);
1768		2174
1769	if (!((WL)w)->next)	2175	if (!((WL)w)->next)
1770	{	2176	{
1771	#if _WIN32	2177	#if _WIN32
1772	signal (w->signum, sighandler);	2178	signal (w->signum, ev_sighandler);
1773	#else	2179	#else
1774	struct sigaction sa;	2180	struct sigaction sa;
1775	sa.sa_handler = sighandler;	2181	sa.sa_handler = ev_sighandler;
1776	sigfillset (&sa.sa_mask);	2182	sigfillset (&sa.sa_mask);
1777	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2183	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1778	sigaction (w->signum, &sa, 0);	2184	sigaction (w->signum, &sa, 0);
1779	#endif	2185	#endif
1780	}	2186	}
…		…
1785	{	2191	{
1786	clear_pending (EV_A_ (W)w);	2192	clear_pending (EV_A_ (W)w);
1787	if (expect_false (!ev_is_active (w)))	2193	if (expect_false (!ev_is_active (w)))
1788	return;	2194	return;
1789		2195
1790	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2196	wlist_del (&signals [w->signum - 1].head, (WL)w);
1791	ev_stop (EV_A_ (W)w);	2197	ev_stop (EV_A_ (W)w);
1792		2198
1793	if (!signals [w->signum - 1].head)	2199	if (!signals [w->signum - 1].head)
1794	signal (w->signum, SIG_DFL);	2200	signal (w->signum, SIG_DFL);
1795	}	2201	}
…		…
1802	#endif	2208	#endif
1803	if (expect_false (ev_is_active (w)))	2209	if (expect_false (ev_is_active (w)))
1804	return;	2210	return;
1805		2211
1806	ev_start (EV_A_ (W)w, 1);	2212	ev_start (EV_A_ (W)w, 1);
1807	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2213	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1808	}	2214	}
1809		2215
1810	void	2216	void
1811	ev_child_stop (EV_P_ ev_child *w)	2217	ev_child_stop (EV_P_ ev_child *w)
1812	{	2218	{
1813	clear_pending (EV_A_ (W)w);	2219	clear_pending (EV_A_ (W)w);
1814	if (expect_false (!ev_is_active (w)))	2220	if (expect_false (!ev_is_active (w)))
1815	return;	2221	return;
1816		2222
1817	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2223	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1818	ev_stop (EV_A_ (W)w);	2224	ev_stop (EV_A_ (W)w);
1819	}	2225	}
1820		2226
1821	#if EV_STAT_ENABLE	2227	#if EV_STAT_ENABLE
1822		2228
…		…
1841	if (w->wd < 0)	2247	if (w->wd < 0)
1842	{	2248	{
1843	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2249	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1844		2250
1845	/* monitor some parent directory for speedup hints */	2251	/* monitor some parent directory for speedup hints */
		2252	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2253	/* but an efficiency issue only */
1846	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2254	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
1847	{	2255	{
1848	char path [4096];	2256	char path [4096];
1849	strcpy (path, w->path);	2257	strcpy (path, w->path);
1850		2258
…		…
2095	clear_pending (EV_A_ (W)w);	2503	clear_pending (EV_A_ (W)w);
2096	if (expect_false (!ev_is_active (w)))	2504	if (expect_false (!ev_is_active (w)))
2097	return;	2505	return;
2098		2506
2099	{	2507	{
2100	int active = ((W)w)->active;	2508	int active = ev_active (w);
2101		2509
2102	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2510	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2103	((W)idles [ABSPRI (w)][active - 1])->active = active;	2511	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2104		2512
2105	ev_stop (EV_A_ (W)w);	2513	ev_stop (EV_A_ (W)w);
2106	--idleall;	2514	--idleall;
2107	}	2515	}
2108	}	2516	}
…		…
2125	clear_pending (EV_A_ (W)w);	2533	clear_pending (EV_A_ (W)w);
2126	if (expect_false (!ev_is_active (w)))	2534	if (expect_false (!ev_is_active (w)))
2127	return;	2535	return;
2128		2536
2129	{	2537	{
2130	int active = ((W)w)->active;	2538	int active = ev_active (w);
		2539
2131	prepares [active - 1] = prepares [--preparecnt];	2540	prepares [active - 1] = prepares [--preparecnt];
2132	((W)prepares [active - 1])->active = active;	2541	ev_active (prepares [active - 1]) = active;
2133	}	2542	}
2134		2543
2135	ev_stop (EV_A_ (W)w);	2544	ev_stop (EV_A_ (W)w);
2136	}	2545	}
2137		2546
…		…
2152	clear_pending (EV_A_ (W)w);	2561	clear_pending (EV_A_ (W)w);
2153	if (expect_false (!ev_is_active (w)))	2562	if (expect_false (!ev_is_active (w)))
2154	return;	2563	return;
2155		2564
2156	{	2565	{
2157	int active = ((W)w)->active;	2566	int active = ev_active (w);
		2567
2158	checks [active - 1] = checks [--checkcnt];	2568	checks [active - 1] = checks [--checkcnt];
2159	((W)checks [active - 1])->active = active;	2569	ev_active (checks [active - 1]) = active;
2160	}	2570	}
2161		2571
2162	ev_stop (EV_A_ (W)w);	2572	ev_stop (EV_A_ (W)w);
2163	}	2573	}
2164		2574
2165	#if EV_EMBED_ENABLE	2575	#if EV_EMBED_ENABLE
2166	void noinline	2576	void noinline
2167	ev_embed_sweep (EV_P_ ev_embed *w)	2577	ev_embed_sweep (EV_P_ ev_embed *w)
2168	{	2578	{
2169	ev_loop (w->loop, EVLOOP_NONBLOCK);	2579	ev_loop (w->other, EVLOOP_NONBLOCK);
2170	}	2580	}
2171		2581
2172	static void	2582	static void
2173	embed_cb (EV_P_ ev_io *io, int revents)	2583	embed_io_cb (EV_P_ ev_io *io, int revents)
2174	{	2584	{
2175	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2585	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2176		2586
2177	if (ev_cb (w))	2587	if (ev_cb (w))
2178	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2588	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2179	else	2589	else
2180	ev_embed_sweep (loop, w);	2590	ev_loop (w->other, EVLOOP_NONBLOCK);
2181	}	2591	}
		2592
		2593	static void
		2594	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2595	{
		2596	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2597
		2598	{
		2599	struct ev_loop *loop = w->other;
		2600
		2601	while (fdchangecnt)
		2602	{
		2603	fd_reify (EV_A);
		2604	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2605	}
		2606	}
		2607	}
		2608
		2609	#if 0
		2610	static void
		2611	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2612	{
		2613	ev_idle_stop (EV_A_ idle);
		2614	}
		2615	#endif
2182		2616
2183	void	2617	void
2184	ev_embed_start (EV_P_ ev_embed *w)	2618	ev_embed_start (EV_P_ ev_embed *w)
2185	{	2619	{
2186	if (expect_false (ev_is_active (w)))	2620	if (expect_false (ev_is_active (w)))
2187	return;	2621	return;
2188		2622
2189	{	2623	{
2190	struct ev_loop *loop = w->loop;	2624	struct ev_loop *loop = w->other;
2191	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2625	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2192	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2626	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2193	}	2627	}
2194		2628
2195	ev_set_priority (&w->io, ev_priority (w));	2629	ev_set_priority (&w->io, ev_priority (w));
2196	ev_io_start (EV_A_ &w->io);	2630	ev_io_start (EV_A_ &w->io);
		2631
		2632	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2633	ev_set_priority (&w->prepare, EV_MINPRI);
		2634	ev_prepare_start (EV_A_ &w->prepare);
		2635
		2636	/ev_idle_init (&w->idle, e,bed_idle_cb);/
2197		2637
2198	ev_start (EV_A_ (W)w, 1);	2638	ev_start (EV_A_ (W)w, 1);
2199	}	2639	}
2200		2640
2201	void	2641	void
…		…
2204	clear_pending (EV_A_ (W)w);	2644	clear_pending (EV_A_ (W)w);
2205	if (expect_false (!ev_is_active (w)))	2645	if (expect_false (!ev_is_active (w)))
2206	return;	2646	return;
2207		2647
2208	ev_io_stop (EV_A_ &w->io);	2648	ev_io_stop (EV_A_ &w->io);
		2649	ev_prepare_stop (EV_A_ &w->prepare);
2209		2650
2210	ev_stop (EV_A_ (W)w);	2651	ev_stop (EV_A_ (W)w);
2211	}	2652	}
2212	#endif	2653	#endif
2213		2654
…		…
2229	clear_pending (EV_A_ (W)w);	2670	clear_pending (EV_A_ (W)w);
2230	if (expect_false (!ev_is_active (w)))	2671	if (expect_false (!ev_is_active (w)))
2231	return;	2672	return;
2232		2673
2233	{	2674	{
2234	int active = ((W)w)->active;	2675	int active = ev_active (w);
		2676
2235	forks [active - 1] = forks [--forkcnt];	2677	forks [active - 1] = forks [--forkcnt];
2236	((W)forks [active - 1])->active = active;	2678	ev_active (forks [active - 1]) = active;
2237	}	2679	}
2238		2680
2239	ev_stop (EV_A_ (W)w);	2681	ev_stop (EV_A_ (W)w);
		2682	}
		2683	#endif
		2684
		2685	#if EV_ASYNC_ENABLE
		2686	void
		2687	ev_async_start (EV_P_ ev_async *w)
		2688	{
		2689	if (expect_false (ev_is_active (w)))
		2690	return;
		2691
		2692	evpipe_init (EV_A);
		2693
		2694	ev_start (EV_A_ (W)w, ++asynccnt);
		2695	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2696	asyncs [asynccnt - 1] = w;
		2697	}
		2698
		2699	void
		2700	ev_async_stop (EV_P_ ev_async *w)
		2701	{
		2702	clear_pending (EV_A_ (W)w);
		2703	if (expect_false (!ev_is_active (w)))
		2704	return;
		2705
		2706	{
		2707	int active = ev_active (w);
		2708
		2709	asyncs [active - 1] = asyncs [--asynccnt];
		2710	ev_active (asyncs [active - 1]) = active;
		2711	}
		2712
		2713	ev_stop (EV_A_ (W)w);
		2714	}
		2715
		2716	void
		2717	ev_async_send (EV_P_ ev_async *w)
		2718	{
		2719	w->sent = 1;
		2720	evpipe_write (EV_A_ &gotasync);
2240	}	2721	}
2241	#endif	2722	#endif
2242		2723
2243	/*****************************************************************************/	2724	/*****************************************************************************/
2244		2725
…		…
2302	ev_timer_set (&once->to, timeout, 0.);	2783	ev_timer_set (&once->to, timeout, 0.);
2303	ev_timer_start (EV_A_ &once->to);	2784	ev_timer_start (EV_A_ &once->to);
2304	}	2785	}
2305	}	2786	}
2306		2787
		2788	#if EV_MULTIPLICITY
		2789	#include "ev_wrap.h"
		2790	#endif
		2791
2307	#ifdef __cplusplus	2792	#ifdef __cplusplus
2308	}	2793	}
2309	#endif	2794	#endif
2310		2795

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Comparing libev/ev.c (file contents): Revision 1.176 by root, Tue Dec 11 04:31:55 2007 UTC vs. Revision 1.243 by root, Fri May 9 15:52:13 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.176 by root, Tue Dec 11 04:31:55 2007 UTC vs.
Revision 1.243 by root, Fri May 9 15:52:13 2008 UTC