[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 1.247 by root, Wed May 21 21:22:10 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	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		808
		809	/* towards the root */
639	void inline_speed	810	void inline_speed
640	upheap (WT *heap, int k)	811	upheap (ANHE *heap, int k)
641	{	812	{
642	WT w = heap [k];	813	ANHE he = heap [k];
643		814
644	while (k && heap [k >> 1]->at > w->at)	815	for (;;)
645	{	816	{
		817	int p = HPARENT (k);
		818
		819	if (p == k \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		820	break;
		821
646	heap [k] = heap [k >> 1];	822	heap [k] = heap [p];
647	((W)heap [k])->active = k + 1;	823	ev_active (ANHE_w (heap [k])) = k;
648	k >>= 1;	824	k = p;
649	}	825	}
650		826
651	heap [k] = w;	827	heap [k] = he;
652	((W)heap [k])->active = k + 1;	828	ev_active (ANHE_w (he)) = k;
653
654	}	829	}
655		830
		831	/* away from the root */
656	void inline_speed	832	void inline_speed
657	downheap (WT *heap, int N, int k)	833	downheap (ANHE *heap, int N, int k)
658	{	834	{
659	WT w = heap [k];	835	ANHE he = heap [k];
		836	ANHE *E = heap + N + HEAP0;
660		837
661	while (k < (N >> 1))	838	for (;;)
662	{	839	{
663	int j = k << 1;	840	ev_tstamp minat;
		841	ANHE *minpos;
		842	ANHE pos = heap + DHEAP (k - HEAP0) + HEAP0;
664		843
665	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	844	// find minimum child
		845	if (expect_true (pos + DHEAP - 1 < E))
666	++j;	846	{
667		847	/* fast path / (minpos = pos + 0), (minat = ANHE_at (minpos));
668	if (w->at <= heap [j]->at)	848	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		849	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		850	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		851	}
		852	else if (pos < E)
		853	{
		854	/* slow path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		855	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		856	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		857	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		858	}
		859	else
669	break;	860	break;
670		861
		862	if (ANHE_at (he) <= minat)
		863	break;
		864
		865	heap [k] = *minpos;
		866	ev_active (ANHE_w (*minpos)) = k;
		867
		868	k = minpos - heap;
		869	}
		870
		871	heap [k] = he;
		872	ev_active (ANHE_w (he)) = k;
		873	}
		874
		875	#else // 4HEAP
		876
		877	#define HEAP0 1
		878	#define HPARENT(k) ((k) >> 1)
		879
		880	/* towards the root */
		881	void inline_speed
		882	upheap (ANHE *heap, int k)
		883	{
		884	ANHE he = heap [k];
		885
		886	for (;;)
		887	{
		888	int p = HPARENT (k);
		889
		890	/* maybe we could use a dummy element at heap [0]? */
		891	if (!p \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		892	break;
		893
671	heap [k] = heap [j];	894	heap [k] = heap [p];
672	((W)heap [k])->active = k + 1;	895	ev_active (ANHE_w (heap [k])) = k;
673	k = j;	896	k = p;
674	}	897	}
675		898
676	heap [k] = w;	899	heap [k] = he;
677	((W)heap [k])->active = k + 1;	900	ev_active (ANHE_w (heap [k])) = k;
678	}	901	}
		902
		903	/* away from the root */
		904	void inline_speed
		905	downheap (ANHE *heap, int N, int k)
		906	{
		907	ANHE he = heap [k];
		908
		909	for (;;)
		910	{
		911	int c = k << 1;
		912
		913	if (c > N)
		914	break;
		915
		916	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		917	? 1 : 0;
		918
		919	if (ANHE_at (he) <= ANHE_at (heap [c]))
		920	break;
		921
		922	heap [k] = heap [c];
		923	ev_active (ANHE_w (heap [k])) = k;
		924
		925	k = c;
		926	}
		927
		928	heap [k] = he;
		929	ev_active (ANHE_w (he)) = k;
		930	}
		931	#endif
679		932
680	void inline_size	933	void inline_size
681	adjustheap (WT *heap, int N, int k)	934	adjustheap (ANHE *heap, int N, int k)
682	{	935	{
		936	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
683	upheap (heap, k);	937	upheap (heap, k);
		938	else
684	downheap (heap, N, k);	939	downheap (heap, N, k);
685	}	940	}
686		941
687	/*****************************************************************************/	942	/*****************************************************************************/
688		943
689	typedef struct	944	typedef struct
690	{	945	{
691	WL head;	946	WL head;
692	sig_atomic_t volatile gotsig;	947	EV_ATOMIC_T gotsig;
693	} ANSIG;	948	} ANSIG;
694		949
695	static ANSIG *signals;	950	static ANSIG *signals;
696	static int signalmax;	951	static int signalmax;
697		952
698	static int sigpipe [2];	953	static EV_ATOMIC_T gotsig;
699	static sig_atomic_t volatile gotsig;
700	static ev_io sigev;
701		954
702	void inline_size	955	void inline_size
703	signals_init (ANSIG *base, int count)	956	signals_init (ANSIG *base, int count)
704	{	957	{
705	while (count--)	958	while (count--)
…		…
709		962
710	++base;	963	++base;
711	}	964	}
712	}	965	}
713		966
714	static void	967	/*****************************************************************************/
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		968
765	void inline_speed	969	void inline_speed
766	fd_intern (int fd)	970	fd_intern (int fd)
767	{	971	{
768	#ifdef _WIN32	972	#ifdef _WIN32
…		…
773	fcntl (fd, F_SETFL, O_NONBLOCK);	977	fcntl (fd, F_SETFL, O_NONBLOCK);
774	#endif	978	#endif
775	}	979	}
776		980
777	static void noinline	981	static void noinline
778	siginit (EV_P)	982	evpipe_init (EV_P)
779	{	983	{
		984	if (!ev_is_active (&pipeev))
		985	{
		986	#if EV_USE_EVENTFD
		987	if ((evfd = eventfd (0, 0)) >= 0)
		988	{
		989	evpipe [0] = -1;
		990	fd_intern (evfd);
		991	ev_io_set (&pipeev, evfd, EV_READ);
		992	}
		993	else
		994	#endif
		995	{
		996	while (pipe (evpipe))
		997	syserr ("(libev) error creating signal/async pipe");
		998
780	fd_intern (sigpipe [0]);	999	fd_intern (evpipe [0]);
781	fd_intern (sigpipe [1]);	1000	fd_intern (evpipe [1]);
		1001	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1002	}
782		1003
783	ev_io_set (&sigev, sigpipe [0], EV_READ);
784	ev_io_start (EV_A_ &sigev);	1004	ev_io_start (EV_A_ &pipeev);
785	ev_unref (EV_A); /* child watcher should not keep loop alive */	1005	ev_unref (EV_A); /* watcher should not keep loop alive */
		1006	}
		1007	}
		1008
		1009	void inline_size
		1010	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1011	{
		1012	if (!*flag)
		1013	{
		1014	int old_errno = errno; /* save errno because write might clobber it */
		1015
		1016	*flag = 1;
		1017
		1018	#if EV_USE_EVENTFD
		1019	if (evfd >= 0)
		1020	{
		1021	uint64_t counter = 1;
		1022	write (evfd, &counter, sizeof (uint64_t));
		1023	}
		1024	else
		1025	#endif
		1026	write (evpipe [1], &old_errno, 1);
		1027
		1028	errno = old_errno;
		1029	}
		1030	}
		1031
		1032	static void
		1033	pipecb (EV_P_ ev_io *iow, int revents)
		1034	{
		1035	#if EV_USE_EVENTFD
		1036	if (evfd >= 0)
		1037	{
		1038	uint64_t counter;
		1039	read (evfd, &counter, sizeof (uint64_t));
		1040	}
		1041	else
		1042	#endif
		1043	{
		1044	char dummy;
		1045	read (evpipe [0], &dummy, 1);
		1046	}
		1047
		1048	if (gotsig && ev_is_default_loop (EV_A))
		1049	{
		1050	int signum;
		1051	gotsig = 0;
		1052
		1053	for (signum = signalmax; signum--; )
		1054	if (signals [signum].gotsig)
		1055	ev_feed_signal_event (EV_A_ signum + 1);
		1056	}
		1057
		1058	#if EV_ASYNC_ENABLE
		1059	if (gotasync)
		1060	{
		1061	int i;
		1062	gotasync = 0;
		1063
		1064	for (i = asynccnt; i--; )
		1065	if (asyncs [i]->sent)
		1066	{
		1067	asyncs [i]->sent = 0;
		1068	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1069	}
		1070	}
		1071	#endif
786	}	1072	}
787		1073
788	/*****************************************************************************/	1074	/*****************************************************************************/
789		1075
		1076	static void
		1077	ev_sighandler (int signum)
		1078	{
		1079	#if EV_MULTIPLICITY
		1080	struct ev_loop *loop = &default_loop_struct;
		1081	#endif
		1082
		1083	#if _WIN32
		1084	signal (signum, ev_sighandler);
		1085	#endif
		1086
		1087	signals [signum - 1].gotsig = 1;
		1088	evpipe_write (EV_A_ &gotsig);
		1089	}
		1090
		1091	void noinline
		1092	ev_feed_signal_event (EV_P_ int signum)
		1093	{
		1094	WL w;
		1095
		1096	#if EV_MULTIPLICITY
		1097	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1098	#endif
		1099
		1100	--signum;
		1101
		1102	if (signum < 0 \|\| signum >= signalmax)
		1103	return;
		1104
		1105	signals [signum].gotsig = 0;
		1106
		1107	for (w = signals [signum].head; w; w = w->next)
		1108	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1109	}
		1110
		1111	/*****************************************************************************/
		1112
790	static ev_child *childs [EV_PID_HASHSIZE];	1113	static WL childs [EV_PID_HASHSIZE];
791		1114
792	#ifndef _WIN32	1115	#ifndef _WIN32
793		1116
794	static ev_signal childev;	1117	static ev_signal childev;
795		1118
		1119	#ifndef WIFCONTINUED
		1120	# define WIFCONTINUED(status) 0
		1121	#endif
		1122
796	void inline_speed	1123	void inline_speed
797	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1124	child_reap (EV_P_ int chain, int pid, int status)
798	{	1125	{
799	ev_child *w;	1126	ev_child *w;
		1127	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
800		1128
801	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1129	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1130	{
802	if (w->pid == pid \|\| !w->pid)	1131	if ((w->pid == pid \|\| !w->pid)
		1132	&& (!traced \|\| (w->flags & 1)))
803	{	1133	{
804	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	1134	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;	1135	w->rpid = pid;
806	w->rstatus = status;	1136	w->rstatus = status;
807	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1137	ev_feed_event (EV_A_ (W)w, EV_CHILD);
808	}	1138	}
		1139	}
809	}	1140	}
810		1141
811	#ifndef WCONTINUED	1142	#ifndef WCONTINUED
812	# define WCONTINUED 0	1143	# define WCONTINUED 0
813	#endif	1144	#endif
…		…
822	if (!WCONTINUED	1153	if (!WCONTINUED
823	\|\| errno != EINVAL	1154	\|\| errno != EINVAL
824	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))	1155	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
825	return;	1156	return;
826		1157
827	/* make sure we are called again until all childs have been reaped */	1158	/* 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 */	1159	/* 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);	1160	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
830		1161
831	child_reap (EV_A_ sw, pid, pid, status);	1162	child_reap (EV_A_ pid, pid, status);
832	if (EV_PID_HASHSIZE > 1)	1163	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 */	1164	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
834	}	1165	}
835		1166
836	#endif	1167	#endif
837		1168
838	/*****************************************************************************/	1169	/*****************************************************************************/
…		…
910	}	1241	}
911		1242
912	unsigned int	1243	unsigned int
913	ev_embeddable_backends (void)	1244	ev_embeddable_backends (void)
914	{	1245	{
915	return EVBACKEND_EPOLL	1246	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
916	\| EVBACKEND_KQUEUE	1247
917	\| EVBACKEND_PORT;	1248	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1249	/* please fix it and tell me how to detect the fix */
		1250	flags &= ~EVBACKEND_EPOLL;
		1251
		1252	return flags;
918	}	1253	}
919		1254
920	unsigned int	1255	unsigned int
921	ev_backend (EV_P)	1256	ev_backend (EV_P)
922	{	1257	{
…		…
925		1260
926	unsigned int	1261	unsigned int
927	ev_loop_count (EV_P)	1262	ev_loop_count (EV_P)
928	{	1263	{
929	return loop_count;	1264	return loop_count;
		1265	}
		1266
		1267	void
		1268	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1269	{
		1270	io_blocktime = interval;
		1271	}
		1272
		1273	void
		1274	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1275	{
		1276	timeout_blocktime = interval;
930	}	1277	}
931		1278
932	static void noinline	1279	static void noinline
933	loop_init (EV_P_ unsigned int flags)	1280	loop_init (EV_P_ unsigned int flags)
934	{	1281	{
…		…
940	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1287	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
941	have_monotonic = 1;	1288	have_monotonic = 1;
942	}	1289	}
943	#endif	1290	#endif
944		1291
945	ev_rt_now = ev_time ();	1292	ev_rt_now = ev_time ();
946	mn_now = get_clock ();	1293	mn_now = get_clock ();
947	now_floor = mn_now;	1294	now_floor = mn_now;
948	rtmn_diff = ev_rt_now - mn_now;	1295	rtmn_diff = ev_rt_now - mn_now;
		1296
		1297	io_blocktime = 0.;
		1298	timeout_blocktime = 0.;
		1299	backend = 0;
		1300	backend_fd = -1;
		1301	gotasync = 0;
		1302	#if EV_USE_INOTIFY
		1303	fs_fd = -2;
		1304	#endif
949		1305
950	/* pid check not overridable via env */	1306	/* pid check not overridable via env */
951	#ifndef _WIN32	1307	#ifndef _WIN32
952	if (flags & EVFLAG_FORKCHECK)	1308	if (flags & EVFLAG_FORKCHECK)
953	curpid = getpid ();	1309	curpid = getpid ();
…		…
956	if (!(flags & EVFLAG_NOENV)	1312	if (!(flags & EVFLAG_NOENV)
957	&& !enable_secure ()	1313	&& !enable_secure ()
958	&& getenv ("LIBEV_FLAGS"))	1314	&& getenv ("LIBEV_FLAGS"))
959	flags = atoi (getenv ("LIBEV_FLAGS"));	1315	flags = atoi (getenv ("LIBEV_FLAGS"));
960		1316
961	if (!(flags & 0x0000ffffUL))	1317	if (!(flags & 0x0000ffffU))
962	flags \|= ev_recommended_backends ();	1318	flags \|= ev_recommended_backends ();
963
964	backend = 0;
965	backend_fd = -1;
966	#if EV_USE_INOTIFY
967	fs_fd = -2;
968	#endif
969		1319
970	#if EV_USE_PORT	1320	#if EV_USE_PORT
971	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1321	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
972	#endif	1322	#endif
973	#if EV_USE_KQUEUE	1323	#if EV_USE_KQUEUE
…		…
981	#endif	1331	#endif
982	#if EV_USE_SELECT	1332	#if EV_USE_SELECT
983	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1333	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
984	#endif	1334	#endif
985		1335
986	ev_init (&sigev, sigcb);	1336	ev_init (&pipeev, pipecb);
987	ev_set_priority (&sigev, EV_MAXPRI);	1337	ev_set_priority (&pipeev, EV_MAXPRI);
988	}	1338	}
989	}	1339	}
990		1340
991	static void noinline	1341	static void noinline
992	loop_destroy (EV_P)	1342	loop_destroy (EV_P)
993	{	1343	{
994	int i;	1344	int i;
		1345
		1346	if (ev_is_active (&pipeev))
		1347	{
		1348	ev_ref (EV_A); /* signal watcher */
		1349	ev_io_stop (EV_A_ &pipeev);
		1350
		1351	#if EV_USE_EVENTFD
		1352	if (evfd >= 0)
		1353	close (evfd);
		1354	#endif
		1355
		1356	if (evpipe [0] >= 0)
		1357	{
		1358	close (evpipe [0]);
		1359	close (evpipe [1]);
		1360	}
		1361	}
995		1362
996	#if EV_USE_INOTIFY	1363	#if EV_USE_INOTIFY
997	if (fs_fd >= 0)	1364	if (fs_fd >= 0)
998	close (fs_fd);	1365	close (fs_fd);
999	#endif	1366	#endif
…		…
1022	array_free (pending, [i]);	1389	array_free (pending, [i]);
1023	#if EV_IDLE_ENABLE	1390	#if EV_IDLE_ENABLE
1024	array_free (idle, [i]);	1391	array_free (idle, [i]);
1025	#endif	1392	#endif
1026	}	1393	}
		1394
		1395	ev_free (anfds); anfdmax = 0;
1027		1396
1028	/* have to use the microsoft-never-gets-it-right macro */	1397	/* have to use the microsoft-never-gets-it-right macro */
1029	array_free (fdchange, EMPTY);	1398	array_free (fdchange, EMPTY);
1030	array_free (timer, EMPTY);	1399	array_free (timer, EMPTY);
1031	#if EV_PERIODIC_ENABLE	1400	#if EV_PERIODIC_ENABLE
1032	array_free (periodic, EMPTY);	1401	array_free (periodic, EMPTY);
1033	#endif	1402	#endif
		1403	#if EV_FORK_ENABLE
		1404	array_free (fork, EMPTY);
		1405	#endif
1034	array_free (prepare, EMPTY);	1406	array_free (prepare, EMPTY);
1035	array_free (check, EMPTY);	1407	array_free (check, EMPTY);
		1408	#if EV_ASYNC_ENABLE
		1409	array_free (async, EMPTY);
		1410	#endif
1036		1411
1037	backend = 0;	1412	backend = 0;
1038	}	1413	}
1039		1414
		1415	#if EV_USE_INOTIFY
1040	void inline_size infy_fork (EV_P);	1416	void inline_size infy_fork (EV_P);
		1417	#endif
1041		1418
1042	void inline_size	1419	void inline_size
1043	loop_fork (EV_P)	1420	loop_fork (EV_P)
1044	{	1421	{
1045	#if EV_USE_PORT	1422	#if EV_USE_PORT
…		…
1053	#endif	1430	#endif
1054	#if EV_USE_INOTIFY	1431	#if EV_USE_INOTIFY
1055	infy_fork (EV_A);	1432	infy_fork (EV_A);
1056	#endif	1433	#endif
1057		1434
1058	if (ev_is_active (&sigev))	1435	if (ev_is_active (&pipeev))
1059	{	1436	{
1060	/* default loop */	1437	/* this "locks" the handlers against writing to the pipe */
		1438	/* while we modify the fd vars */
		1439	gotsig = 1;
		1440	#if EV_ASYNC_ENABLE
		1441	gotasync = 1;
		1442	#endif
1061		1443
1062	ev_ref (EV_A);	1444	ev_ref (EV_A);
1063	ev_io_stop (EV_A_ &sigev);	1445	ev_io_stop (EV_A_ &pipeev);
		1446
		1447	#if EV_USE_EVENTFD
		1448	if (evfd >= 0)
		1449	close (evfd);
		1450	#endif
		1451
		1452	if (evpipe [0] >= 0)
		1453	{
1064	close (sigpipe [0]);	1454	close (evpipe [0]);
1065	close (sigpipe [1]);	1455	close (evpipe [1]);
		1456	}
1066		1457
1067	while (pipe (sigpipe))
1068	syserr ("(libev) error creating pipe");
1069
1070	siginit (EV_A);	1458	evpipe_init (EV_A);
		1459	/* now iterate over everything, in case we missed something */
		1460	pipecb (EV_A_ &pipeev, EV_READ);
1071	}	1461	}
1072		1462
1073	postfork = 0;	1463	postfork = 0;
1074	}	1464	}
1075		1465
…		…
1097	}	1487	}
1098		1488
1099	void	1489	void
1100	ev_loop_fork (EV_P)	1490	ev_loop_fork (EV_P)
1101	{	1491	{
1102	postfork = 1;	1492	postfork = 1; /* must be in line with ev_default_fork */
1103	}	1493	}
1104
1105	#endif	1494	#endif
1106		1495
1107	#if EV_MULTIPLICITY	1496	#if EV_MULTIPLICITY
1108	struct ev_loop *	1497	struct ev_loop *
1109	ev_default_loop_init (unsigned int flags)	1498	ev_default_loop_init (unsigned int flags)
1110	#else	1499	#else
1111	int	1500	int
1112	ev_default_loop (unsigned int flags)	1501	ev_default_loop (unsigned int flags)
1113	#endif	1502	#endif
1114	{	1503	{
1115	if (sigpipe [0] == sigpipe [1])
1116	if (pipe (sigpipe))
1117	return 0;
1118
1119	if (!ev_default_loop_ptr)	1504	if (!ev_default_loop_ptr)
1120	{	1505	{
1121	#if EV_MULTIPLICITY	1506	#if EV_MULTIPLICITY
1122	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1507	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1123	#else	1508	#else
…		…
1126		1511
1127	loop_init (EV_A_ flags);	1512	loop_init (EV_A_ flags);
1128		1513
1129	if (ev_backend (EV_A))	1514	if (ev_backend (EV_A))
1130	{	1515	{
1131	siginit (EV_A);
1132
1133	#ifndef _WIN32	1516	#ifndef _WIN32
1134	ev_signal_init (&childev, childcb, SIGCHLD);	1517	ev_signal_init (&childev, childcb, SIGCHLD);
1135	ev_set_priority (&childev, EV_MAXPRI);	1518	ev_set_priority (&childev, EV_MAXPRI);
1136	ev_signal_start (EV_A_ &childev);	1519	ev_signal_start (EV_A_ &childev);
1137	ev_unref (EV_A); /* child watcher should not keep loop alive */	1520	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1154	#ifndef _WIN32	1537	#ifndef _WIN32
1155	ev_ref (EV_A); /* child watcher */	1538	ev_ref (EV_A); /* child watcher */
1156	ev_signal_stop (EV_A_ &childev);	1539	ev_signal_stop (EV_A_ &childev);
1157	#endif	1540	#endif
1158		1541
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);	1542	loop_destroy (EV_A);
1166	}	1543	}
1167		1544
1168	void	1545	void
1169	ev_default_fork (void)	1546	ev_default_fork (void)
…		…
1171	#if EV_MULTIPLICITY	1548	#if EV_MULTIPLICITY
1172	struct ev_loop *loop = ev_default_loop_ptr;	1549	struct ev_loop *loop = ev_default_loop_ptr;
1173	#endif	1550	#endif
1174		1551
1175	if (backend)	1552	if (backend)
1176	postfork = 1;	1553	postfork = 1; /* must be in line with ev_loop_fork */
1177	}	1554	}
1178		1555
1179	/*****************************************************************************/	1556	/*****************************************************************************/
1180		1557
1181	void	1558	void
…		…
1201	p->w->pending = 0;	1578	p->w->pending = 0;
1202	EV_CB_INVOKE (p->w, p->events);	1579	EV_CB_INVOKE (p->w, p->events);
1203	}	1580	}
1204	}	1581	}
1205	}	1582	}
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		1583
1286	#if EV_IDLE_ENABLE	1584	#if EV_IDLE_ENABLE
1287	void inline_size	1585	void inline_size
1288	idle_reify (EV_P)	1586	idle_reify (EV_P)
1289	{	1587	{
…		…
1304	}	1602	}
1305	}	1603	}
1306	}	1604	}
1307	#endif	1605	#endif
1308		1606
1309	int inline_size	1607	void inline_size
1310	time_update_monotonic (EV_P)	1608	timers_reify (EV_P)
1311	{	1609	{
		1610	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		1611	{
		1612	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
		1613
		1614	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
		1615
		1616	/* first reschedule or stop timer */
		1617	if (w->repeat)
		1618	{
		1619	ev_at (w) += w->repeat;
		1620	if (ev_at (w) < mn_now)
		1621	ev_at (w) = mn_now;
		1622
		1623	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1624
		1625	ANHE_at_set (timers [HEAP0]);
		1626	downheap (timers, timercnt, HEAP0);
		1627	}
		1628	else
		1629	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1630
		1631	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1632	}
		1633	}
		1634
		1635	#if EV_PERIODIC_ENABLE
		1636	void inline_size
		1637	periodics_reify (EV_P)
		1638	{
		1639	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
		1640	{
		1641	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		1642
		1643	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
		1644
		1645	/* first reschedule or stop timer */
		1646	if (w->reschedule_cb)
		1647	{
		1648	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1649
		1650	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1651
		1652	ANHE_at_set (periodics [HEAP0]);
		1653	downheap (periodics, periodiccnt, HEAP0);
		1654	}
		1655	else if (w->interval)
		1656	{
		1657	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1658	/* if next trigger time is not sufficiently in the future, put it there */
		1659	/* this might happen because of floating point inexactness */
		1660	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1661	{
		1662	ev_at (w) += w->interval;
		1663
		1664	/* if interval is unreasonably low we might still have a time in the past */
		1665	/* so correct this. this will make the periodic very inexact, but the user */
		1666	/* has effectively asked to get triggered more often than possible */
		1667	if (ev_at (w) < ev_rt_now)
		1668	ev_at (w) = ev_rt_now;
		1669	}
		1670
		1671	ANHE_at_set (periodics [HEAP0]);
		1672	downheap (periodics, periodiccnt, HEAP0);
		1673	}
		1674	else
		1675	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1676
		1677	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1678	}
		1679	}
		1680
		1681	static void noinline
		1682	periodics_reschedule (EV_P)
		1683	{
		1684	int i;
		1685
		1686	/* adjust periodics after time jump */
		1687	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1688	{
		1689	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
		1690
		1691	if (w->reschedule_cb)
		1692	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1693	else if (w->interval)
		1694	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1695
		1696	ANHE_at_set (periodics [i]);
		1697	}
		1698
		1699	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1700	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
		1701	for (i = 0; i < periodiccnt; ++i)
		1702	upheap (periodics, i + HEAP0);
		1703	}
		1704	#endif
		1705
		1706	void inline_speed
		1707	time_update (EV_P_ ev_tstamp max_block)
		1708	{
		1709	int i;
		1710
		1711	#if EV_USE_MONOTONIC
		1712	if (expect_true (have_monotonic))
		1713	{
		1714	ev_tstamp odiff = rtmn_diff;
		1715
1312	mn_now = get_clock ();	1716	mn_now = get_clock ();
1313		1717
		1718	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1719	/* interpolate in the meantime */
1314	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1720	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1315	{	1721	{
1316	ev_rt_now = rtmn_diff + mn_now;	1722	ev_rt_now = rtmn_diff + mn_now;
1317	return 0;	1723	return;
1318	}	1724	}
1319	else	1725
1320	{
1321	now_floor = mn_now;	1726	now_floor = mn_now;
1322	ev_rt_now = ev_time ();	1727	ev_rt_now = ev_time ();
1323	return 1;
1324	}
1325	}
1326		1728
1327	void inline_size	1729	/* loop a few times, before making important decisions.
1328	time_update (EV_P)	1730	* on the choice of "4": one iteration isn't enough,
1329	{	1731	* in case we get preempted during the calls to
1330	int i;	1732	* ev_time and get_clock. a second call is almost guaranteed
1331		1733	* to succeed in that case, though. and looping a few more times
1332	#if EV_USE_MONOTONIC	1734	* doesn't hurt either as we only do this on time-jumps or
1333	if (expect_true (have_monotonic))	1735	* in the unlikely event of having been preempted here.
1334	{	1736	*/
1335	if (time_update_monotonic (EV_A))	1737	for (i = 4; --i; )
1336	{	1738	{
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;	1739	rtmn_diff = ev_rt_now - mn_now;
1350		1740
1351	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1741	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1352	return; /* all is well */	1742	return; /* all is well */
1353		1743
1354	ev_rt_now = ev_time ();	1744	ev_rt_now = ev_time ();
1355	mn_now = get_clock ();	1745	mn_now = get_clock ();
1356	now_floor = mn_now;	1746	now_floor = mn_now;
1357	}	1747	}
1358		1748
1359	# if EV_PERIODIC_ENABLE	1749	# if EV_PERIODIC_ENABLE
1360	periodics_reschedule (EV_A);	1750	periodics_reschedule (EV_A);
1361	# endif	1751	# endif
1362	/* no timer adjustment, as the monotonic clock doesn't jump */	1752	/* no timer adjustment, as the monotonic clock doesn't jump */
1363	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1753	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1364	}
1365	}	1754	}
1366	else	1755	else
1367	#endif	1756	#endif
1368	{	1757	{
1369	ev_rt_now = ev_time ();	1758	ev_rt_now = ev_time ();
1370		1759
1371	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1760	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1372	{	1761	{
1373	#if EV_PERIODIC_ENABLE	1762	#if EV_PERIODIC_ENABLE
1374	periodics_reschedule (EV_A);	1763	periodics_reschedule (EV_A);
1375	#endif	1764	#endif
1376
1377	/* adjust timers. this is easy, as the offset is the same for all of them */	1765	/* adjust timers. this is easy, as the offset is the same for all of them */
1378	for (i = 0; i < timercnt; ++i)	1766	for (i = 0; i < timercnt; ++i)
		1767	{
		1768	ANHE *he = timers + i + HEAP0;
1379	((WT)timers [i])->at += ev_rt_now - mn_now;	1769	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1770	ANHE_at_set (*he);
		1771	}
1380	}	1772	}
1381		1773
1382	mn_now = ev_rt_now;	1774	mn_now = ev_rt_now;
1383	}	1775	}
1384	}	1776	}
…		…
1398	static int loop_done;	1790	static int loop_done;
1399		1791
1400	void	1792	void
1401	ev_loop (EV_P_ int flags)	1793	ev_loop (EV_P_ int flags)
1402	{	1794	{
1403	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1795	loop_done = EVUNLOOP_CANCEL;
1404	? EVUNLOOP_ONE
1405	: EVUNLOOP_CANCEL;
1406		1796
1407	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1797	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1408		1798
1409	do	1799	do
1410	{	1800	{
…		…
1444	/* update fd-related kernel structures */	1834	/* update fd-related kernel structures */
1445	fd_reify (EV_A);	1835	fd_reify (EV_A);
1446		1836
1447	/* calculate blocking time */	1837	/* calculate blocking time */
1448	{	1838	{
1449	ev_tstamp block;	1839	ev_tstamp waittime = 0.;
		1840	ev_tstamp sleeptime = 0.;
1450		1841
1451	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1842	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1452	block = 0.; /* do not block at all */
1453	else
1454	{	1843	{
1455	/* update time to cancel out callback processing overhead */	1844	/* 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);	1845	time_update (EV_A_ 1e100);
1459	else
1460	#endif
1461	{
1462	ev_rt_now = ev_time ();
1463	mn_now = ev_rt_now;
1464	}
1465		1846
1466	block = MAX_BLOCKTIME;	1847	waittime = MAX_BLOCKTIME;
1467		1848
1468	if (timercnt)	1849	if (timercnt)
1469	{	1850	{
1470	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1851	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1471	if (block > to) block = to;	1852	if (waittime > to) waittime = to;
1472	}	1853	}
1473		1854
1474	#if EV_PERIODIC_ENABLE	1855	#if EV_PERIODIC_ENABLE
1475	if (periodiccnt)	1856	if (periodiccnt)
1476	{	1857	{
1477	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1858	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1478	if (block > to) block = to;	1859	if (waittime > to) waittime = to;
1479	}	1860	}
1480	#endif	1861	#endif
1481		1862
1482	if (expect_false (block < 0.)) block = 0.;	1863	if (expect_false (waittime < timeout_blocktime))
		1864	waittime = timeout_blocktime;
		1865
		1866	sleeptime = waittime - backend_fudge;
		1867
		1868	if (expect_true (sleeptime > io_blocktime))
		1869	sleeptime = io_blocktime;
		1870
		1871	if (sleeptime)
		1872	{
		1873	ev_sleep (sleeptime);
		1874	waittime -= sleeptime;
		1875	}
1483	}	1876	}
1484		1877
1485	++loop_count;	1878	++loop_count;
1486	backend_poll (EV_A_ block);	1879	backend_poll (EV_A_ waittime);
		1880
		1881	/* update ev_rt_now, do magic */
		1882	time_update (EV_A_ waittime + sleeptime);
1487	}	1883	}
1488
1489	/* update ev_rt_now, do magic */
1490	time_update (EV_A);
1491		1884
1492	/* queue pending timers and reschedule them */	1885	/* queue pending timers and reschedule them */
1493	timers_reify (EV_A); /* relative timers called last */	1886	timers_reify (EV_A); /* relative timers called last */
1494	#if EV_PERIODIC_ENABLE	1887	#if EV_PERIODIC_ENABLE
1495	periodics_reify (EV_A); /* absolute timers called first */	1888	periodics_reify (EV_A); /* absolute timers called first */
…		…
1503	/* queue check watchers, to be executed first */	1896	/* queue check watchers, to be executed first */
1504	if (expect_false (checkcnt))	1897	if (expect_false (checkcnt))
1505	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1898	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1506		1899
1507	call_pending (EV_A);	1900	call_pending (EV_A);
1508
1509	}	1901	}
1510	while (expect_true (activecnt && !loop_done));	1902	while (expect_true (
		1903	activecnt
		1904	&& !loop_done
		1905	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1906	));
1511		1907
1512	if (loop_done == EVUNLOOP_ONE)	1908	if (loop_done == EVUNLOOP_ONE)
1513	loop_done = EVUNLOOP_CANCEL;	1909	loop_done = EVUNLOOP_CANCEL;
1514	}	1910	}
1515		1911
…		…
1606		2002
1607	assert (("ev_io_start called with negative fd", fd >= 0));	2003	assert (("ev_io_start called with negative fd", fd >= 0));
1608		2004
1609	ev_start (EV_A_ (W)w, 1);	2005	ev_start (EV_A_ (W)w, 1);
1610	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2006	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1611	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2007	wlist_add (&anfds[fd].head, (WL)w);
1612		2008
1613	fd_change (EV_A_ fd);	2009	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		2010	w->events &= ~EV_IOFDSET;
1614	}	2011	}
1615		2012
1616	void noinline	2013	void noinline
1617	ev_io_stop (EV_P_ ev_io *w)	2014	ev_io_stop (EV_P_ ev_io *w)
1618	{	2015	{
1619	clear_pending (EV_A_ (W)w);	2016	clear_pending (EV_A_ (W)w);
1620	if (expect_false (!ev_is_active (w)))	2017	if (expect_false (!ev_is_active (w)))
1621	return;	2018	return;
1622		2019
1623	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2020	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1624		2021
1625	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2022	wlist_del (&anfds[w->fd].head, (WL)w);
1626	ev_stop (EV_A_ (W)w);	2023	ev_stop (EV_A_ (W)w);
1627		2024
1628	fd_change (EV_A_ w->fd);	2025	fd_change (EV_A_ w->fd, 1);
1629	}	2026	}
1630		2027
1631	void noinline	2028	void noinline
1632	ev_timer_start (EV_P_ ev_timer *w)	2029	ev_timer_start (EV_P_ ev_timer *w)
1633	{	2030	{
1634	if (expect_false (ev_is_active (w)))	2031	if (expect_false (ev_is_active (w)))
1635	return;	2032	return;
1636		2033
1637	((WT)w)->at += mn_now;	2034	ev_at (w) += mn_now;
1638		2035
1639	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2036	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1640		2037
1641	ev_start (EV_A_ (W)w, ++timercnt);	2038	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1642	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	2039	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1643	timers [timercnt - 1] = w;	2040	ANHE_w (timers [ev_active (w)]) = (WT)w;
1644	upheap ((WT *)timers, timercnt - 1);	2041	ANHE_at_set (timers [ev_active (w)]);
		2042	upheap (timers, ev_active (w));
1645		2043
1646	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/	2044	/assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
1647	}	2045	}
1648		2046
1649	void noinline	2047	void noinline
1650	ev_timer_stop (EV_P_ ev_timer *w)	2048	ev_timer_stop (EV_P_ ev_timer *w)
1651	{	2049	{
1652	clear_pending (EV_A_ (W)w);	2050	clear_pending (EV_A_ (W)w);
1653	if (expect_false (!ev_is_active (w)))	2051	if (expect_false (!ev_is_active (w)))
1654	return;	2052	return;
1655		2053
1656	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1657
1658	{	2054	{
1659	int active = ((W)w)->active;	2055	int active = ev_active (w);
1660		2056
		2057	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2058
1661	if (expect_true (--active < --timercnt))	2059	if (expect_true (active < timercnt + HEAP0 - 1))
1662	{	2060	{
1663	timers [active] = timers [timercnt];	2061	timers [active] = timers [timercnt + HEAP0 - 1];
1664	adjustheap ((WT *)timers, timercnt, active);	2062	adjustheap (timers, timercnt, active);
1665	}	2063	}
		2064
		2065	--timercnt;
1666	}	2066	}
1667		2067
1668	((WT)w)->at -= mn_now;	2068	ev_at (w) -= mn_now;
1669		2069
1670	ev_stop (EV_A_ (W)w);	2070	ev_stop (EV_A_ (W)w);
1671	}	2071	}
1672		2072
1673	void noinline	2073	void noinline
…		…
1675	{	2075	{
1676	if (ev_is_active (w))	2076	if (ev_is_active (w))
1677	{	2077	{
1678	if (w->repeat)	2078	if (w->repeat)
1679	{	2079	{
1680	((WT)w)->at = mn_now + w->repeat;	2080	ev_at (w) = mn_now + w->repeat;
		2081	ANHE_at_set (timers [ev_active (w)]);
1681	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2082	adjustheap (timers, timercnt, ev_active (w));
1682	}	2083	}
1683	else	2084	else
1684	ev_timer_stop (EV_A_ w);	2085	ev_timer_stop (EV_A_ w);
1685	}	2086	}
1686	else if (w->repeat)	2087	else if (w->repeat)
1687	{	2088	{
1688	w->at = w->repeat;	2089	ev_at (w) = w->repeat;
1689	ev_timer_start (EV_A_ w);	2090	ev_timer_start (EV_A_ w);
1690	}	2091	}
1691	}	2092	}
1692		2093
1693	#if EV_PERIODIC_ENABLE	2094	#if EV_PERIODIC_ENABLE
…		…
1696	{	2097	{
1697	if (expect_false (ev_is_active (w)))	2098	if (expect_false (ev_is_active (w)))
1698	return;	2099	return;
1699		2100
1700	if (w->reschedule_cb)	2101	if (w->reschedule_cb)
1701	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2102	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1702	else if (w->interval)	2103	else if (w->interval)
1703	{	2104	{
1704	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2105	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 */	2106	/* 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;	2107	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1707	}	2108	}
1708	else	2109	else
1709	((WT)w)->at = w->offset;	2110	ev_at (w) = w->offset;
1710		2111
1711	ev_start (EV_A_ (W)w, ++periodiccnt);	2112	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1712	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2113	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1713	periodics [periodiccnt - 1] = w;	2114	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1714	upheap ((WT *)periodics, periodiccnt - 1);	2115	ANHE_at_set (periodics [ev_active (w)]);
		2116	upheap (periodics, ev_active (w));
1715		2117
1716	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/	2118	/assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
1717	}	2119	}
1718		2120
1719	void noinline	2121	void noinline
1720	ev_periodic_stop (EV_P_ ev_periodic *w)	2122	ev_periodic_stop (EV_P_ ev_periodic *w)
1721	{	2123	{
1722	clear_pending (EV_A_ (W)w);	2124	clear_pending (EV_A_ (W)w);
1723	if (expect_false (!ev_is_active (w)))	2125	if (expect_false (!ev_is_active (w)))
1724	return;	2126	return;
1725		2127
1726	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1727
1728	{	2128	{
1729	int active = ((W)w)->active;	2129	int active = ev_active (w);
1730		2130
		2131	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2132
1731	if (expect_true (--active < --periodiccnt))	2133	if (expect_true (active < periodiccnt + HEAP0 - 1))
1732	{	2134	{
1733	periodics [active] = periodics [periodiccnt];	2135	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1734	adjustheap ((WT *)periodics, periodiccnt, active);	2136	adjustheap (periodics, periodiccnt, active);
1735	}	2137	}
		2138
		2139	--periodiccnt;
1736	}	2140	}
1737		2141
1738	ev_stop (EV_A_ (W)w);	2142	ev_stop (EV_A_ (W)w);
1739	}	2143	}
1740		2144
…		…
1760	if (expect_false (ev_is_active (w)))	2164	if (expect_false (ev_is_active (w)))
1761	return;	2165	return;
1762		2166
1763	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2167	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1764		2168
		2169	evpipe_init (EV_A);
		2170
		2171	{
		2172	#ifndef _WIN32
		2173	sigset_t full, prev;
		2174	sigfillset (&full);
		2175	sigprocmask (SIG_SETMASK, &full, &prev);
		2176	#endif
		2177
		2178	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2179
		2180	#ifndef _WIN32
		2181	sigprocmask (SIG_SETMASK, &prev, 0);
		2182	#endif
		2183	}
		2184
1765	ev_start (EV_A_ (W)w, 1);	2185	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);	2186	wlist_add (&signals [w->signum - 1].head, (WL)w);
1768		2187
1769	if (!((WL)w)->next)	2188	if (!((WL)w)->next)
1770	{	2189	{
1771	#if _WIN32	2190	#if _WIN32
1772	signal (w->signum, sighandler);	2191	signal (w->signum, ev_sighandler);
1773	#else	2192	#else
1774	struct sigaction sa;	2193	struct sigaction sa;
1775	sa.sa_handler = sighandler;	2194	sa.sa_handler = ev_sighandler;
1776	sigfillset (&sa.sa_mask);	2195	sigfillset (&sa.sa_mask);
1777	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2196	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1778	sigaction (w->signum, &sa, 0);	2197	sigaction (w->signum, &sa, 0);
1779	#endif	2198	#endif
1780	}	2199	}
…		…
1785	{	2204	{
1786	clear_pending (EV_A_ (W)w);	2205	clear_pending (EV_A_ (W)w);
1787	if (expect_false (!ev_is_active (w)))	2206	if (expect_false (!ev_is_active (w)))
1788	return;	2207	return;
1789		2208
1790	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2209	wlist_del (&signals [w->signum - 1].head, (WL)w);
1791	ev_stop (EV_A_ (W)w);	2210	ev_stop (EV_A_ (W)w);
1792		2211
1793	if (!signals [w->signum - 1].head)	2212	if (!signals [w->signum - 1].head)
1794	signal (w->signum, SIG_DFL);	2213	signal (w->signum, SIG_DFL);
1795	}	2214	}
…		…
1802	#endif	2221	#endif
1803	if (expect_false (ev_is_active (w)))	2222	if (expect_false (ev_is_active (w)))
1804	return;	2223	return;
1805		2224
1806	ev_start (EV_A_ (W)w, 1);	2225	ev_start (EV_A_ (W)w, 1);
1807	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2226	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1808	}	2227	}
1809		2228
1810	void	2229	void
1811	ev_child_stop (EV_P_ ev_child *w)	2230	ev_child_stop (EV_P_ ev_child *w)
1812	{	2231	{
1813	clear_pending (EV_A_ (W)w);	2232	clear_pending (EV_A_ (W)w);
1814	if (expect_false (!ev_is_active (w)))	2233	if (expect_false (!ev_is_active (w)))
1815	return;	2234	return;
1816		2235
1817	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2236	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1818	ev_stop (EV_A_ (W)w);	2237	ev_stop (EV_A_ (W)w);
1819	}	2238	}
1820		2239
1821	#if EV_STAT_ENABLE	2240	#if EV_STAT_ENABLE
1822		2241
…		…
1841	if (w->wd < 0)	2260	if (w->wd < 0)
1842	{	2261	{
1843	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2262	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1844		2263
1845	/* monitor some parent directory for speedup hints */	2264	/* monitor some parent directory for speedup hints */
		2265	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2266	/* but an efficiency issue only */
1846	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2267	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
1847	{	2268	{
1848	char path [4096];	2269	char path [4096];
1849	strcpy (path, w->path);	2270	strcpy (path, w->path);
1850		2271
…		…
2095	clear_pending (EV_A_ (W)w);	2516	clear_pending (EV_A_ (W)w);
2096	if (expect_false (!ev_is_active (w)))	2517	if (expect_false (!ev_is_active (w)))
2097	return;	2518	return;
2098		2519
2099	{	2520	{
2100	int active = ((W)w)->active;	2521	int active = ev_active (w);
2101		2522
2102	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2523	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2103	((W)idles [ABSPRI (w)][active - 1])->active = active;	2524	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2104		2525
2105	ev_stop (EV_A_ (W)w);	2526	ev_stop (EV_A_ (W)w);
2106	--idleall;	2527	--idleall;
2107	}	2528	}
2108	}	2529	}
…		…
2125	clear_pending (EV_A_ (W)w);	2546	clear_pending (EV_A_ (W)w);
2126	if (expect_false (!ev_is_active (w)))	2547	if (expect_false (!ev_is_active (w)))
2127	return;	2548	return;
2128		2549
2129	{	2550	{
2130	int active = ((W)w)->active;	2551	int active = ev_active (w);
		2552
2131	prepares [active - 1] = prepares [--preparecnt];	2553	prepares [active - 1] = prepares [--preparecnt];
2132	((W)prepares [active - 1])->active = active;	2554	ev_active (prepares [active - 1]) = active;
2133	}	2555	}
2134		2556
2135	ev_stop (EV_A_ (W)w);	2557	ev_stop (EV_A_ (W)w);
2136	}	2558	}
2137		2559
…		…
2152	clear_pending (EV_A_ (W)w);	2574	clear_pending (EV_A_ (W)w);
2153	if (expect_false (!ev_is_active (w)))	2575	if (expect_false (!ev_is_active (w)))
2154	return;	2576	return;
2155		2577
2156	{	2578	{
2157	int active = ((W)w)->active;	2579	int active = ev_active (w);
		2580
2158	checks [active - 1] = checks [--checkcnt];	2581	checks [active - 1] = checks [--checkcnt];
2159	((W)checks [active - 1])->active = active;	2582	ev_active (checks [active - 1]) = active;
2160	}	2583	}
2161		2584
2162	ev_stop (EV_A_ (W)w);	2585	ev_stop (EV_A_ (W)w);
2163	}	2586	}
2164		2587
2165	#if EV_EMBED_ENABLE	2588	#if EV_EMBED_ENABLE
2166	void noinline	2589	void noinline
2167	ev_embed_sweep (EV_P_ ev_embed *w)	2590	ev_embed_sweep (EV_P_ ev_embed *w)
2168	{	2591	{
2169	ev_loop (w->loop, EVLOOP_NONBLOCK);	2592	ev_loop (w->other, EVLOOP_NONBLOCK);
2170	}	2593	}
2171		2594
2172	static void	2595	static void
2173	embed_cb (EV_P_ ev_io *io, int revents)	2596	embed_io_cb (EV_P_ ev_io *io, int revents)
2174	{	2597	{
2175	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2598	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2176		2599
2177	if (ev_cb (w))	2600	if (ev_cb (w))
2178	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2601	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2179	else	2602	else
2180	ev_embed_sweep (loop, w);	2603	ev_loop (w->other, EVLOOP_NONBLOCK);
2181	}	2604	}
		2605
		2606	static void
		2607	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2608	{
		2609	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2610
		2611	{
		2612	struct ev_loop *loop = w->other;
		2613
		2614	while (fdchangecnt)
		2615	{
		2616	fd_reify (EV_A);
		2617	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2618	}
		2619	}
		2620	}
		2621
		2622	#if 0
		2623	static void
		2624	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2625	{
		2626	ev_idle_stop (EV_A_ idle);
		2627	}
		2628	#endif
2182		2629
2183	void	2630	void
2184	ev_embed_start (EV_P_ ev_embed *w)	2631	ev_embed_start (EV_P_ ev_embed *w)
2185	{	2632	{
2186	if (expect_false (ev_is_active (w)))	2633	if (expect_false (ev_is_active (w)))
2187	return;	2634	return;
2188		2635
2189	{	2636	{
2190	struct ev_loop *loop = w->loop;	2637	struct ev_loop *loop = w->other;
2191	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2638	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2192	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2639	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2193	}	2640	}
2194		2641
2195	ev_set_priority (&w->io, ev_priority (w));	2642	ev_set_priority (&w->io, ev_priority (w));
2196	ev_io_start (EV_A_ &w->io);	2643	ev_io_start (EV_A_ &w->io);
		2644
		2645	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2646	ev_set_priority (&w->prepare, EV_MINPRI);
		2647	ev_prepare_start (EV_A_ &w->prepare);
		2648
		2649	/ev_idle_init (&w->idle, e,bed_idle_cb);/
2197		2650
2198	ev_start (EV_A_ (W)w, 1);	2651	ev_start (EV_A_ (W)w, 1);
2199	}	2652	}
2200		2653
2201	void	2654	void
…		…
2204	clear_pending (EV_A_ (W)w);	2657	clear_pending (EV_A_ (W)w);
2205	if (expect_false (!ev_is_active (w)))	2658	if (expect_false (!ev_is_active (w)))
2206	return;	2659	return;
2207		2660
2208	ev_io_stop (EV_A_ &w->io);	2661	ev_io_stop (EV_A_ &w->io);
		2662	ev_prepare_stop (EV_A_ &w->prepare);
2209		2663
2210	ev_stop (EV_A_ (W)w);	2664	ev_stop (EV_A_ (W)w);
2211	}	2665	}
2212	#endif	2666	#endif
2213		2667
…		…
2229	clear_pending (EV_A_ (W)w);	2683	clear_pending (EV_A_ (W)w);
2230	if (expect_false (!ev_is_active (w)))	2684	if (expect_false (!ev_is_active (w)))
2231	return;	2685	return;
2232		2686
2233	{	2687	{
2234	int active = ((W)w)->active;	2688	int active = ev_active (w);
		2689
2235	forks [active - 1] = forks [--forkcnt];	2690	forks [active - 1] = forks [--forkcnt];
2236	((W)forks [active - 1])->active = active;	2691	ev_active (forks [active - 1]) = active;
2237	}	2692	}
2238		2693
2239	ev_stop (EV_A_ (W)w);	2694	ev_stop (EV_A_ (W)w);
		2695	}
		2696	#endif
		2697
		2698	#if EV_ASYNC_ENABLE
		2699	void
		2700	ev_async_start (EV_P_ ev_async *w)
		2701	{
		2702	if (expect_false (ev_is_active (w)))
		2703	return;
		2704
		2705	evpipe_init (EV_A);
		2706
		2707	ev_start (EV_A_ (W)w, ++asynccnt);
		2708	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2709	asyncs [asynccnt - 1] = w;
		2710	}
		2711
		2712	void
		2713	ev_async_stop (EV_P_ ev_async *w)
		2714	{
		2715	clear_pending (EV_A_ (W)w);
		2716	if (expect_false (!ev_is_active (w)))
		2717	return;
		2718
		2719	{
		2720	int active = ev_active (w);
		2721
		2722	asyncs [active - 1] = asyncs [--asynccnt];
		2723	ev_active (asyncs [active - 1]) = active;
		2724	}
		2725
		2726	ev_stop (EV_A_ (W)w);
		2727	}
		2728
		2729	void
		2730	ev_async_send (EV_P_ ev_async *w)
		2731	{
		2732	w->sent = 1;
		2733	evpipe_write (EV_A_ &gotasync);
2240	}	2734	}
2241	#endif	2735	#endif
2242		2736
2243	/*****************************************************************************/	2737	/*****************************************************************************/
2244		2738
…		…
2302	ev_timer_set (&once->to, timeout, 0.);	2796	ev_timer_set (&once->to, timeout, 0.);
2303	ev_timer_start (EV_A_ &once->to);	2797	ev_timer_start (EV_A_ &once->to);
2304	}	2798	}
2305	}	2799	}
2306		2800
		2801	#if EV_MULTIPLICITY
		2802	#include "ev_wrap.h"
		2803	#endif
		2804
2307	#ifdef __cplusplus	2805	#ifdef __cplusplus
2308	}	2806	}
2309	#endif	2807	#endif
2310		2808

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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 1.247 by root, Wed May 21 21:22:10 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 1.247 by root, Wed May 21 21:22:10 2008 UTC