[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 1.242 by root, Fri May 9 14:07:19 2008 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
37	# ifdef EV_CONFIG_H	46	# ifdef EV_CONFIG_H
38	# include EV_CONFIG_H	47	# include EV_CONFIG_H
39	# else	48	# else
40	# include "config.h"	49	# include "config.h"
51	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	61	# define EV_USE_MONOTONIC 0
53	# endif	62	# endif
54	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
56	# endif	73	# endif
57	# endif	74	# endif
58		75
59	# ifndef EV_USE_SELECT	76	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
102	# else	119	# else
103	# define EV_USE_INOTIFY 0	120	# define EV_USE_INOTIFY 0
104	# endif	121	# endif
105	# endif	122	# endif
106		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
107	#endif	132	#endif
108		133
109	#include <math.h>	134	#include <math.h>
110	#include <stdlib.h>	135	#include <stdlib.h>
111	#include <fcntl.h>	136	#include <fcntl.h>
…		…
136	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
137	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
138	# endif	163	# endif
139	#endif	164	#endif
140		165
141	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
142		167
143	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
144	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
145	#endif	170	#endif
146		171
147	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
149	#endif	178	#endif
150		179
151	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
153	#endif	182	#endif
…		…
159	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
160	# endif	189	# endif
161	#endif	190	#endif
162		191
163	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
164	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
165	#endif	198	#endif
166		199
167	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
168	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
169	#endif	202	#endif
…		…
171	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
172	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
173	#endif	206	#endif
174		207
175	#ifndef EV_USE_INOTIFY	208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
176	# define EV_USE_INOTIFY 0	212	# define EV_USE_INOTIFY 0
		213	# endif
177	#endif	214	#endif
178		215
179	#ifndef EV_PID_HASHSIZE	216	#ifndef EV_PID_HASHSIZE
180	# if EV_MINIMAL	217	# if EV_MINIMAL
181	# define EV_PID_HASHSIZE 1	218	# define EV_PID_HASHSIZE 1
…		…
190	# else	227	# else
191	# define EV_INOTIFY_HASHSIZE 16	228	# define EV_INOTIFY_HASHSIZE 16
192	# endif	229	# endif
193	#endif	230	#endif
194		231
195	/**/	232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196		241
197	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
198	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
199	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
200	#endif	245	#endif
…		…
202	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
203	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
204	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
205	#endif	250	#endif
206		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
207	#if EV_SELECT_IS_WINSOCKET	267	#if EV_SELECT_IS_WINSOCKET
208	# include <winsock.h>	268	# include <winsock.h>
209	#endif	269	#endif
210		270
211	#if !EV_STAT_ENABLE	271	#if EV_USE_EVENTFD
212	# define EV_USE_INOTIFY 0	272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
213	#endif	276	# endif
214		277	int eventfd (unsigned int initval, int flags);
215	#if EV_USE_INOTIFY	278	# ifdef __cplusplus
216	# include <sys/inotify.h>	279	}
		280	# endif
217	#endif	281	#endif
218		282
219	/**/	283	/**/
220		284
221	/*	285	/*
222	* This is used to avoid floating point rounding problems.	286	* This is used to avoid floating point rounding problems.
223	* It is added to ev_rt_now when scheduling periodics	287	* It is added to ev_rt_now when scheduling periodics
224	* to ensure progress, time-wise, even when rounding	288	* to ensure progress, time-wise, even when rounding
225	* errors are against us.	289	* errors are against us.
226	* This value is good at least till the year 4000	290	* This value is good at least till the year 4000.
227	* and intervals up to 20 years.
228	* Better solutions welcome.	291	* Better solutions welcome.
229	*/	292	*/
230	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
231		294
232	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
233	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
234	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */	297	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
235		298
236	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
237	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
238	# define noinline __attribute__ ((noinline))	301	# define noinline __attribute__ ((noinline))
239	#else	302	#else
240	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
241	# define noinline	304	# define noinline
242	# if __STDC_VERSION__ < 199901L	305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
243	# define inline	306	# define inline
244	# endif	307	# endif
245	#endif	308	#endif
246		309
247	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
262		325
263	typedef ev_watcher *W;	326	typedef ev_watcher *W;
264	typedef ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
265	typedef ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
266		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
267	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
268		338
269	#ifdef _WIN32	339	#ifdef _WIN32
270	# include "ev_win32.c"	340	# include "ev_win32.c"
271	#endif	341	#endif
272		342
…		…
293	perror (msg);	363	perror (msg);
294	abort ();	364	abort ();
295	}	365	}
296	}	366	}
297		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
298	static void (alloc)(void *ptr, long size);	383	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
299		384
300	void	385	void
301	ev_set_allocator (void (cb)(void *ptr, long size))	386	ev_set_allocator (void (cb)(void *ptr, long size))
302	{	387	{
303	alloc = cb;	388	alloc = cb;
304	}	389	}
305		390
306	inline_speed void *	391	inline_speed void *
307	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
308	{	393	{
309	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
310		395
311	if (!ptr && size)	396	if (!ptr && size)
312	{	397	{
313	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
314	abort ();	399	abort ();
…		…
337	W w;	422	W w;
338	int events;	423	int events;
339	} ANPENDING;	424	} ANPENDING;
340		425
341	#if EV_USE_INOTIFY	426	#if EV_USE_INOTIFY
		427	/* hash table entry per inotify-id */
342	typedef struct	428	typedef struct
343	{	429	{
344	WL head;	430	WL head;
345	} ANFS;	431	} ANFS;
		432	#endif
		433
		434	/* Heap Entry */
		435	#define EV_HEAP_CACHE_AT 0
		436	#if EV_HEAP_CACHE_AT
		437	typedef struct {
		438	WT w;
		439	ev_tstamp at;
		440	} ANHE;
		441
		442	#define ANHE_w(he) (he).w /* access watcher, read-write */
		443	#define ANHE_at(he) (he).at /* access cached at, read-only */
		444	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		445	#else
		446	typedef WT ANHE;
		447
		448	#define ANHE_w(he) (he)
		449	#define ANHE_at(he) (he)->at
		450	#define ANHE_at_set(he)
346	#endif	451	#endif
347		452
348	#if EV_MULTIPLICITY	453	#if EV_MULTIPLICITY
349		454
350	struct ev_loop	455	struct ev_loop
…		…
408	{	513	{
409	return ev_rt_now;	514	return ev_rt_now;
410	}	515	}
411	#endif	516	#endif
412		517
		518	void
		519	ev_sleep (ev_tstamp delay)
		520	{
		521	if (delay > 0.)
		522	{
		523	#if EV_USE_NANOSLEEP
		524	struct timespec ts;
		525
		526	ts.tv_sec = (time_t)delay;
		527	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		528
		529	nanosleep (&ts, 0);
		530	#elif defined(_WIN32)
		531	Sleep ((unsigned long)(delay * 1e3));
		532	#else
		533	struct timeval tv;
		534
		535	tv.tv_sec = (time_t)delay;
		536	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		537
		538	select (0, 0, 0, 0, &tv);
		539	#endif
		540	}
		541	}
		542
		543	/*****************************************************************************/
		544
		545	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
		546
413	int inline_size	547	int inline_size
414	array_nextsize (int elem, int cur, int cnt)	548	array_nextsize (int elem, int cur, int cnt)
415	{	549	{
416	int ncur = cur + 1;	550	int ncur = cur + 1;
417		551
418	do	552	do
419	ncur <<= 1;	553	ncur <<= 1;
420	while (cnt > ncur);	554	while (cnt > ncur);
421		555
422	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	556	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
423	if (elem * ncur > 4096)	557	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
424	{	558	{
425	ncur *= elem;	559	ncur *= elem;
426	ncur = (ncur + elem + 4095 + sizeof (void ) 4) & ~4095;	560	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
427	ncur = ncur - sizeof (void ) 4;	561	ncur = ncur - sizeof (void ) 4;
428	ncur /= elem;	562	ncur /= elem;
429	}	563	}
430		564
431	return ncur;	565	return ncur;
…		…
477	pendings [pri][w_->pending - 1].w = w_;	611	pendings [pri][w_->pending - 1].w = w_;
478	pendings [pri][w_->pending - 1].events = revents;	612	pendings [pri][w_->pending - 1].events = revents;
479	}	613	}
480	}	614	}
481		615
482	void inline_size	616	void inline_speed
483	queue_events (EV_P_ W *events, int eventcnt, int type)	617	queue_events (EV_P_ W *events, int eventcnt, int type)
484	{	618	{
485	int i;	619	int i;
486		620
487	for (i = 0; i < eventcnt; ++i)	621	for (i = 0; i < eventcnt; ++i)
…		…
534	{	668	{
535	int fd = fdchanges [i];	669	int fd = fdchanges [i];
536	ANFD *anfd = anfds + fd;	670	ANFD *anfd = anfds + fd;
537	ev_io *w;	671	ev_io *w;
538		672
539	int events = 0;	673	unsigned char events = 0;
540		674
541	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	675	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
542	events \|= w->events;	676	events \|= (unsigned char)w->events;
543		677
544	#if EV_SELECT_IS_WINSOCKET	678	#if EV_SELECT_IS_WINSOCKET
545	if (events)	679	if (events)
546	{	680	{
547	unsigned long argp;	681	unsigned long argp;
		682	#ifdef EV_FD_TO_WIN32_HANDLE
		683	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		684	#else
548	anfd->handle = _get_osfhandle (fd);	685	anfd->handle = _get_osfhandle (fd);
		686	#endif
549	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	687	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
550	}	688	}
551	#endif	689	#endif
552		690
		691	{
		692	unsigned char o_events = anfd->events;
		693	unsigned char o_reify = anfd->reify;
		694
553	anfd->reify = 0;	695	anfd->reify = 0;
554
555	backend_modify (EV_A_ fd, anfd->events, events);
556	anfd->events = events;	696	anfd->events = events;
		697
		698	if (o_events != events \|\| o_reify & EV_IOFDSET)
		699	backend_modify (EV_A_ fd, o_events, events);
		700	}
557	}	701	}
558		702
559	fdchangecnt = 0;	703	fdchangecnt = 0;
560	}	704	}
561		705
562	void inline_size	706	void inline_size
563	fd_change (EV_P_ int fd)	707	fd_change (EV_P_ int fd, int flags)
564	{	708	{
565	if (expect_false (anfds [fd].reify))	709	unsigned char reify = anfds [fd].reify;
566	return;
567
568	anfds [fd].reify = 1;	710	anfds [fd].reify \|= flags;
569		711
		712	if (expect_true (!reify))
		713	{
570	++fdchangecnt;	714	++fdchangecnt;
571	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	715	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
572	fdchanges [fdchangecnt - 1] = fd;	716	fdchanges [fdchangecnt - 1] = fd;
		717	}
573	}	718	}
574		719
575	void inline_speed	720	void inline_speed
576	fd_kill (EV_P_ int fd)	721	fd_kill (EV_P_ int fd)
577	{	722	{
…		…
628		773
629	for (fd = 0; fd < anfdmax; ++fd)	774	for (fd = 0; fd < anfdmax; ++fd)
630	if (anfds [fd].events)	775	if (anfds [fd].events)
631	{	776	{
632	anfds [fd].events = 0;	777	anfds [fd].events = 0;
633	fd_change (EV_A_ fd);	778	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
634	}	779	}
635	}	780	}
636		781
637	/*****************************************************************************/	782	/*****************************************************************************/
638		783
		784	/*
		785	* the heap functions want a real array index. array index 0 uis guaranteed to not
		786	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		787	* the branching factor of the d-tree.
		788	*/
		789
		790	/*
		791	* at the moment we allow libev the luxury of two heaps,
		792	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		793	* which is more cache-efficient.
		794	* the difference is about 5% with 50000+ watchers.
		795	*/
		796	#define EV_USE_4HEAP !EV_MINIMAL
		797	#if EV_USE_4HEAP
		798
		799	#define DHEAP 4
		800	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		801
		802	/* towards the root */
639	void inline_speed	803	void inline_speed
640	upheap (WT *heap, int k)	804	upheap (ANHE *heap, int k)
641	{	805	{
642	WT w = heap [k];	806	ANHE he = heap [k];
643		807
644	while (k && heap [k >> 1]->at > w->at)	808	for (;;)
645	{	809	{
		810	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		811
		812	if (p == k \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		813	break;
		814
646	heap [k] = heap [k >> 1];	815	heap [k] = heap [p];
647	((W)heap [k])->active = k + 1;	816	ev_active (ANHE_w (heap [k])) = k;
648	k >>= 1;	817	k = p;
		818	}
		819
		820	ev_active (ANHE_w (he)) = k;
		821	heap [k] = he;
		822	}
		823
		824	/* away from the root */
		825	void inline_speed
		826	downheap (ANHE *heap, int N, int k)
		827	{
		828	ANHE he = heap [k];
		829	ANHE *E = heap + N + HEAP0;
		830
		831	for (;;)
		832	{
		833	ev_tstamp minat;
		834	ANHE *minpos;
		835	ANHE pos = heap + DHEAP (k - HEAP0) + HEAP0;
		836
		837	// find minimum child
		838	if (expect_true (pos + DHEAP - 1 < E))
		839	{
		840	/* fast path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		841	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		842	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		843	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		844	}
		845	else if (pos < E)
		846	{
		847	/* slow path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		848	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		849	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		850	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		851	}
		852	else
		853	break;
		854
		855	if (ANHE_at (he) <= minat)
		856	break;
		857
		858	ev_active (ANHE_w (*minpos)) = k;
		859	heap [k] = *minpos;
		860
		861	k = minpos - heap;
		862	}
		863
		864	ev_active (ANHE_w (he)) = k;
		865	heap [k] = he;
		866	}
		867
		868	#else // 4HEAP
		869
		870	#define HEAP0 1
		871
		872	/* towards the root */
		873	void inline_speed
		874	upheap (ANHE *heap, int k)
		875	{
		876	ANHE he = heap [k];
		877
		878	for (;;)
		879	{
		880	int p = k >> 1;
		881
		882	/* maybe we could use a dummy element at heap [0]? */
		883	if (!p \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		884	break;
		885
		886	heap [k] = heap [p];
		887	ev_active (ANHE_w (heap [k])) = k;
		888	k = p;
649	}	889	}
650		890
651	heap [k] = w;	891	heap [k] = w;
652	((W)heap [k])->active = k + 1;	892	ev_active (ANHE_w (heap [k])) = k;
653
654	}	893	}
655		894
		895	/* away from the root */
656	void inline_speed	896	void inline_speed
657	downheap (WT *heap, int N, int k)	897	downheap (ANHE *heap, int N, int k)
658	{	898	{
659	WT w = heap [k];	899	ANHE he = heap [k];
660		900
661	while (k < (N >> 1))	901	for (;;)
662	{	902	{
663	int j = k << 1;	903	int c = k << 1;
664		904
665	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	905	if (c > N)
666	++j;
667
668	if (w->at <= heap [j]->at)
669	break;	906	break;
670		907
		908	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		909	? 1 : 0;
		910
		911	if (w->at <= ANHE_at (heap [c]))
		912	break;
		913
671	heap [k] = heap [j];	914	heap [k] = heap [c];
672	((W)heap [k])->active = k + 1;	915	ev_active (ANHE_w (heap [k])) = k;
		916
673	k = j;	917	k = c;
674	}	918	}
675		919
676	heap [k] = w;	920	heap [k] = he;
677	((W)heap [k])->active = k + 1;	921	ev_active (ANHE_w (he)) = k;
678	}	922	}
		923	#endif
679		924
680	void inline_size	925	void inline_size
681	adjustheap (WT *heap, int N, int k)	926	adjustheap (ANHE *heap, int N, int k)
682	{	927	{
683	upheap (heap, k);	928	upheap (heap, k);
684	downheap (heap, N, k);	929	downheap (heap, N, k);
685	}	930	}
686		931
687	/*****************************************************************************/	932	/*****************************************************************************/
688		933
689	typedef struct	934	typedef struct
690	{	935	{
691	WL head;	936	WL head;
692	sig_atomic_t volatile gotsig;	937	EV_ATOMIC_T gotsig;
693	} ANSIG;	938	} ANSIG;
694		939
695	static ANSIG *signals;	940	static ANSIG *signals;
696	static int signalmax;	941	static int signalmax;
697		942
698	static int sigpipe [2];	943	static EV_ATOMIC_T gotsig;
699	static sig_atomic_t volatile gotsig;
700	static ev_io sigev;
701		944
702	void inline_size	945	void inline_size
703	signals_init (ANSIG *base, int count)	946	signals_init (ANSIG *base, int count)
704	{	947	{
705	while (count--)	948	while (count--)
…		…
709		952
710	++base;	953	++base;
711	}	954	}
712	}	955	}
713		956
714	static void	957	/*****************************************************************************/
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		958
765	void inline_speed	959	void inline_speed
766	fd_intern (int fd)	960	fd_intern (int fd)
767	{	961	{
768	#ifdef _WIN32	962	#ifdef _WIN32
…		…
773	fcntl (fd, F_SETFL, O_NONBLOCK);	967	fcntl (fd, F_SETFL, O_NONBLOCK);
774	#endif	968	#endif
775	}	969	}
776		970
777	static void noinline	971	static void noinline
778	siginit (EV_P)	972	evpipe_init (EV_P)
779	{	973	{
		974	if (!ev_is_active (&pipeev))
		975	{
		976	#if EV_USE_EVENTFD
		977	if ((evfd = eventfd (0, 0)) >= 0)
		978	{
		979	evpipe [0] = -1;
		980	fd_intern (evfd);
		981	ev_io_set (&pipeev, evfd, EV_READ);
		982	}
		983	else
		984	#endif
		985	{
		986	while (pipe (evpipe))
		987	syserr ("(libev) error creating signal/async pipe");
		988
780	fd_intern (sigpipe [0]);	989	fd_intern (evpipe [0]);
781	fd_intern (sigpipe [1]);	990	fd_intern (evpipe [1]);
		991	ev_io_set (&pipeev, evpipe [0], EV_READ);
		992	}
782		993
783	ev_io_set (&sigev, sigpipe [0], EV_READ);
784	ev_io_start (EV_A_ &sigev);	994	ev_io_start (EV_A_ &pipeev);
785	ev_unref (EV_A); /* child watcher should not keep loop alive */	995	ev_unref (EV_A); /* watcher should not keep loop alive */
		996	}
		997	}
		998
		999	void inline_size
		1000	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1001	{
		1002	if (!*flag)
		1003	{
		1004	int old_errno = errno; /* save errno because write might clobber it */
		1005
		1006	*flag = 1;
		1007
		1008	#if EV_USE_EVENTFD
		1009	if (evfd >= 0)
		1010	{
		1011	uint64_t counter = 1;
		1012	write (evfd, &counter, sizeof (uint64_t));
		1013	}
		1014	else
		1015	#endif
		1016	write (evpipe [1], &old_errno, 1);
		1017
		1018	errno = old_errno;
		1019	}
		1020	}
		1021
		1022	static void
		1023	pipecb (EV_P_ ev_io *iow, int revents)
		1024	{
		1025	#if EV_USE_EVENTFD
		1026	if (evfd >= 0)
		1027	{
		1028	uint64_t counter;
		1029	read (evfd, &counter, sizeof (uint64_t));
		1030	}
		1031	else
		1032	#endif
		1033	{
		1034	char dummy;
		1035	read (evpipe [0], &dummy, 1);
		1036	}
		1037
		1038	if (gotsig && ev_is_default_loop (EV_A))
		1039	{
		1040	int signum;
		1041	gotsig = 0;
		1042
		1043	for (signum = signalmax; signum--; )
		1044	if (signals [signum].gotsig)
		1045	ev_feed_signal_event (EV_A_ signum + 1);
		1046	}
		1047
		1048	#if EV_ASYNC_ENABLE
		1049	if (gotasync)
		1050	{
		1051	int i;
		1052	gotasync = 0;
		1053
		1054	for (i = asynccnt; i--; )
		1055	if (asyncs [i]->sent)
		1056	{
		1057	asyncs [i]->sent = 0;
		1058	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1059	}
		1060	}
		1061	#endif
786	}	1062	}
787		1063
788	/*****************************************************************************/	1064	/*****************************************************************************/
789		1065
		1066	static void
		1067	ev_sighandler (int signum)
		1068	{
		1069	#if EV_MULTIPLICITY
		1070	struct ev_loop *loop = &default_loop_struct;
		1071	#endif
		1072
		1073	#if _WIN32
		1074	signal (signum, ev_sighandler);
		1075	#endif
		1076
		1077	signals [signum - 1].gotsig = 1;
		1078	evpipe_write (EV_A_ &gotsig);
		1079	}
		1080
		1081	void noinline
		1082	ev_feed_signal_event (EV_P_ int signum)
		1083	{
		1084	WL w;
		1085
		1086	#if EV_MULTIPLICITY
		1087	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1088	#endif
		1089
		1090	--signum;
		1091
		1092	if (signum < 0 \|\| signum >= signalmax)
		1093	return;
		1094
		1095	signals [signum].gotsig = 0;
		1096
		1097	for (w = signals [signum].head; w; w = w->next)
		1098	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1099	}
		1100
		1101	/*****************************************************************************/
		1102
790	static ev_child *childs [EV_PID_HASHSIZE];	1103	static WL childs [EV_PID_HASHSIZE];
791		1104
792	#ifndef _WIN32	1105	#ifndef _WIN32
793		1106
794	static ev_signal childev;	1107	static ev_signal childev;
795		1108
		1109	#ifndef WIFCONTINUED
		1110	# define WIFCONTINUED(status) 0
		1111	#endif
		1112
796	void inline_speed	1113	void inline_speed
797	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1114	child_reap (EV_P_ int chain, int pid, int status)
798	{	1115	{
799	ev_child *w;	1116	ev_child *w;
		1117	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
800		1118
801	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1119	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1120	{
802	if (w->pid == pid \|\| !w->pid)	1121	if ((w->pid == pid \|\| !w->pid)
		1122	&& (!traced \|\| (w->flags & 1)))
803	{	1123	{
804	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	1124	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;	1125	w->rpid = pid;
806	w->rstatus = status;	1126	w->rstatus = status;
807	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1127	ev_feed_event (EV_A_ (W)w, EV_CHILD);
808	}	1128	}
		1129	}
809	}	1130	}
810		1131
811	#ifndef WCONTINUED	1132	#ifndef WCONTINUED
812	# define WCONTINUED 0	1133	# define WCONTINUED 0
813	#endif	1134	#endif
…		…
822	if (!WCONTINUED	1143	if (!WCONTINUED
823	\|\| errno != EINVAL	1144	\|\| errno != EINVAL
824	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))	1145	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
825	return;	1146	return;
826		1147
827	/* make sure we are called again until all childs have been reaped */	1148	/* 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 */	1149	/* 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);	1150	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
830		1151
831	child_reap (EV_A_ sw, pid, pid, status);	1152	child_reap (EV_A_ pid, pid, status);
832	if (EV_PID_HASHSIZE > 1)	1153	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 */	1154	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
834	}	1155	}
835		1156
836	#endif	1157	#endif
837		1158
838	/*****************************************************************************/	1159	/*****************************************************************************/
…		…
910	}	1231	}
911		1232
912	unsigned int	1233	unsigned int
913	ev_embeddable_backends (void)	1234	ev_embeddable_backends (void)
914	{	1235	{
915	return EVBACKEND_EPOLL	1236	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
916	\| EVBACKEND_KQUEUE	1237
917	\| EVBACKEND_PORT;	1238	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1239	/* please fix it and tell me how to detect the fix */
		1240	flags &= ~EVBACKEND_EPOLL;
		1241
		1242	return flags;
918	}	1243	}
919		1244
920	unsigned int	1245	unsigned int
921	ev_backend (EV_P)	1246	ev_backend (EV_P)
922	{	1247	{
…		…
925		1250
926	unsigned int	1251	unsigned int
927	ev_loop_count (EV_P)	1252	ev_loop_count (EV_P)
928	{	1253	{
929	return loop_count;	1254	return loop_count;
		1255	}
		1256
		1257	void
		1258	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1259	{
		1260	io_blocktime = interval;
		1261	}
		1262
		1263	void
		1264	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	timeout_blocktime = interval;
930	}	1267	}
931		1268
932	static void noinline	1269	static void noinline
933	loop_init (EV_P_ unsigned int flags)	1270	loop_init (EV_P_ unsigned int flags)
934	{	1271	{
…		…
940	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1277	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
941	have_monotonic = 1;	1278	have_monotonic = 1;
942	}	1279	}
943	#endif	1280	#endif
944		1281
945	ev_rt_now = ev_time ();	1282	ev_rt_now = ev_time ();
946	mn_now = get_clock ();	1283	mn_now = get_clock ();
947	now_floor = mn_now;	1284	now_floor = mn_now;
948	rtmn_diff = ev_rt_now - mn_now;	1285	rtmn_diff = ev_rt_now - mn_now;
		1286
		1287	io_blocktime = 0.;
		1288	timeout_blocktime = 0.;
		1289	backend = 0;
		1290	backend_fd = -1;
		1291	gotasync = 0;
		1292	#if EV_USE_INOTIFY
		1293	fs_fd = -2;
		1294	#endif
949		1295
950	/* pid check not overridable via env */	1296	/* pid check not overridable via env */
951	#ifndef _WIN32	1297	#ifndef _WIN32
952	if (flags & EVFLAG_FORKCHECK)	1298	if (flags & EVFLAG_FORKCHECK)
953	curpid = getpid ();	1299	curpid = getpid ();
…		…
956	if (!(flags & EVFLAG_NOENV)	1302	if (!(flags & EVFLAG_NOENV)
957	&& !enable_secure ()	1303	&& !enable_secure ()
958	&& getenv ("LIBEV_FLAGS"))	1304	&& getenv ("LIBEV_FLAGS"))
959	flags = atoi (getenv ("LIBEV_FLAGS"));	1305	flags = atoi (getenv ("LIBEV_FLAGS"));
960		1306
961	if (!(flags & 0x0000ffffUL))	1307	if (!(flags & 0x0000ffffU))
962	flags \|= ev_recommended_backends ();	1308	flags \|= ev_recommended_backends ();
963
964	backend = 0;
965	backend_fd = -1;
966	#if EV_USE_INOTIFY
967	fs_fd = -2;
968	#endif
969		1309
970	#if EV_USE_PORT	1310	#if EV_USE_PORT
971	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1311	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
972	#endif	1312	#endif
973	#if EV_USE_KQUEUE	1313	#if EV_USE_KQUEUE
…		…
981	#endif	1321	#endif
982	#if EV_USE_SELECT	1322	#if EV_USE_SELECT
983	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1323	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
984	#endif	1324	#endif
985		1325
986	ev_init (&sigev, sigcb);	1326	ev_init (&pipeev, pipecb);
987	ev_set_priority (&sigev, EV_MAXPRI);	1327	ev_set_priority (&pipeev, EV_MAXPRI);
988	}	1328	}
989	}	1329	}
990		1330
991	static void noinline	1331	static void noinline
992	loop_destroy (EV_P)	1332	loop_destroy (EV_P)
993	{	1333	{
994	int i;	1334	int i;
		1335
		1336	if (ev_is_active (&pipeev))
		1337	{
		1338	ev_ref (EV_A); /* signal watcher */
		1339	ev_io_stop (EV_A_ &pipeev);
		1340
		1341	#if EV_USE_EVENTFD
		1342	if (evfd >= 0)
		1343	close (evfd);
		1344	#endif
		1345
		1346	if (evpipe [0] >= 0)
		1347	{
		1348	close (evpipe [0]);
		1349	close (evpipe [1]);
		1350	}
		1351	}
995		1352
996	#if EV_USE_INOTIFY	1353	#if EV_USE_INOTIFY
997	if (fs_fd >= 0)	1354	if (fs_fd >= 0)
998	close (fs_fd);	1355	close (fs_fd);
999	#endif	1356	#endif
…		…
1022	array_free (pending, [i]);	1379	array_free (pending, [i]);
1023	#if EV_IDLE_ENABLE	1380	#if EV_IDLE_ENABLE
1024	array_free (idle, [i]);	1381	array_free (idle, [i]);
1025	#endif	1382	#endif
1026	}	1383	}
		1384
		1385	ev_free (anfds); anfdmax = 0;
1027		1386
1028	/* have to use the microsoft-never-gets-it-right macro */	1387	/* have to use the microsoft-never-gets-it-right macro */
1029	array_free (fdchange, EMPTY);	1388	array_free (fdchange, EMPTY);
1030	array_free (timer, EMPTY);	1389	array_free (timer, EMPTY);
1031	#if EV_PERIODIC_ENABLE	1390	#if EV_PERIODIC_ENABLE
1032	array_free (periodic, EMPTY);	1391	array_free (periodic, EMPTY);
1033	#endif	1392	#endif
		1393	#if EV_FORK_ENABLE
		1394	array_free (fork, EMPTY);
		1395	#endif
1034	array_free (prepare, EMPTY);	1396	array_free (prepare, EMPTY);
1035	array_free (check, EMPTY);	1397	array_free (check, EMPTY);
		1398	#if EV_ASYNC_ENABLE
		1399	array_free (async, EMPTY);
		1400	#endif
1036		1401
1037	backend = 0;	1402	backend = 0;
1038	}	1403	}
1039		1404
		1405	#if EV_USE_INOTIFY
1040	void inline_size infy_fork (EV_P);	1406	void inline_size infy_fork (EV_P);
		1407	#endif
1041		1408
1042	void inline_size	1409	void inline_size
1043	loop_fork (EV_P)	1410	loop_fork (EV_P)
1044	{	1411	{
1045	#if EV_USE_PORT	1412	#if EV_USE_PORT
…		…
1053	#endif	1420	#endif
1054	#if EV_USE_INOTIFY	1421	#if EV_USE_INOTIFY
1055	infy_fork (EV_A);	1422	infy_fork (EV_A);
1056	#endif	1423	#endif
1057		1424
1058	if (ev_is_active (&sigev))	1425	if (ev_is_active (&pipeev))
1059	{	1426	{
1060	/* default loop */	1427	/* this "locks" the handlers against writing to the pipe */
		1428	/* while we modify the fd vars */
		1429	gotsig = 1;
		1430	#if EV_ASYNC_ENABLE
		1431	gotasync = 1;
		1432	#endif
1061		1433
1062	ev_ref (EV_A);	1434	ev_ref (EV_A);
1063	ev_io_stop (EV_A_ &sigev);	1435	ev_io_stop (EV_A_ &pipeev);
		1436
		1437	#if EV_USE_EVENTFD
		1438	if (evfd >= 0)
		1439	close (evfd);
		1440	#endif
		1441
		1442	if (evpipe [0] >= 0)
		1443	{
1064	close (sigpipe [0]);	1444	close (evpipe [0]);
1065	close (sigpipe [1]);	1445	close (evpipe [1]);
		1446	}
1066		1447
1067	while (pipe (sigpipe))
1068	syserr ("(libev) error creating pipe");
1069
1070	siginit (EV_A);	1448	evpipe_init (EV_A);
		1449	/* now iterate over everything, in case we missed something */
		1450	pipecb (EV_A_ &pipeev, EV_READ);
1071	}	1451	}
1072		1452
1073	postfork = 0;	1453	postfork = 0;
1074	}	1454	}
1075		1455
…		…
1097	}	1477	}
1098		1478
1099	void	1479	void
1100	ev_loop_fork (EV_P)	1480	ev_loop_fork (EV_P)
1101	{	1481	{
1102	postfork = 1;	1482	postfork = 1; /* must be in line with ev_default_fork */
1103	}	1483	}
1104
1105	#endif	1484	#endif
1106		1485
1107	#if EV_MULTIPLICITY	1486	#if EV_MULTIPLICITY
1108	struct ev_loop *	1487	struct ev_loop *
1109	ev_default_loop_init (unsigned int flags)	1488	ev_default_loop_init (unsigned int flags)
1110	#else	1489	#else
1111	int	1490	int
1112	ev_default_loop (unsigned int flags)	1491	ev_default_loop (unsigned int flags)
1113	#endif	1492	#endif
1114	{	1493	{
1115	if (sigpipe [0] == sigpipe [1])
1116	if (pipe (sigpipe))
1117	return 0;
1118
1119	if (!ev_default_loop_ptr)	1494	if (!ev_default_loop_ptr)
1120	{	1495	{
1121	#if EV_MULTIPLICITY	1496	#if EV_MULTIPLICITY
1122	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1497	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1123	#else	1498	#else
…		…
1126		1501
1127	loop_init (EV_A_ flags);	1502	loop_init (EV_A_ flags);
1128		1503
1129	if (ev_backend (EV_A))	1504	if (ev_backend (EV_A))
1130	{	1505	{
1131	siginit (EV_A);
1132
1133	#ifndef _WIN32	1506	#ifndef _WIN32
1134	ev_signal_init (&childev, childcb, SIGCHLD);	1507	ev_signal_init (&childev, childcb, SIGCHLD);
1135	ev_set_priority (&childev, EV_MAXPRI);	1508	ev_set_priority (&childev, EV_MAXPRI);
1136	ev_signal_start (EV_A_ &childev);	1509	ev_signal_start (EV_A_ &childev);
1137	ev_unref (EV_A); /* child watcher should not keep loop alive */	1510	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1154	#ifndef _WIN32	1527	#ifndef _WIN32
1155	ev_ref (EV_A); /* child watcher */	1528	ev_ref (EV_A); /* child watcher */
1156	ev_signal_stop (EV_A_ &childev);	1529	ev_signal_stop (EV_A_ &childev);
1157	#endif	1530	#endif
1158		1531
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);	1532	loop_destroy (EV_A);
1166	}	1533	}
1167		1534
1168	void	1535	void
1169	ev_default_fork (void)	1536	ev_default_fork (void)
…		…
1171	#if EV_MULTIPLICITY	1538	#if EV_MULTIPLICITY
1172	struct ev_loop *loop = ev_default_loop_ptr;	1539	struct ev_loop *loop = ev_default_loop_ptr;
1173	#endif	1540	#endif
1174		1541
1175	if (backend)	1542	if (backend)
1176	postfork = 1;	1543	postfork = 1; /* must be in line with ev_loop_fork */
1177	}	1544	}
1178		1545
1179	/*****************************************************************************/	1546	/*****************************************************************************/
1180		1547
1181	void	1548	void
…		…
1201	p->w->pending = 0;	1568	p->w->pending = 0;
1202	EV_CB_INVOKE (p->w, p->events);	1569	EV_CB_INVOKE (p->w, p->events);
1203	}	1570	}
1204	}	1571	}
1205	}	1572	}
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		1573
1286	#if EV_IDLE_ENABLE	1574	#if EV_IDLE_ENABLE
1287	void inline_size	1575	void inline_size
1288	idle_reify (EV_P)	1576	idle_reify (EV_P)
1289	{	1577	{
…		…
1304	}	1592	}
1305	}	1593	}
1306	}	1594	}
1307	#endif	1595	#endif
1308		1596
1309	int inline_size	1597	void inline_size
1310	time_update_monotonic (EV_P)	1598	timers_reify (EV_P)
1311	{	1599	{
		1600	while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
		1601	{
		1602	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
		1603
		1604	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
		1605
		1606	/* first reschedule or stop timer */
		1607	if (w->repeat)
		1608	{
		1609	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1610
		1611	ev_at (w) += w->repeat;
		1612	if (ev_at (w) < mn_now)
		1613	ev_at (w) = mn_now;
		1614
		1615	ANHE_at_set (timers [HEAP0]);
		1616	downheap (timers, timercnt, HEAP0);
		1617	}
		1618	else
		1619	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1620
		1621	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1622	}
		1623	}
		1624
		1625	#if EV_PERIODIC_ENABLE
		1626	void inline_size
		1627	periodics_reify (EV_P)
		1628	{
		1629	while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
		1630	{
		1631	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		1632
		1633	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
		1634
		1635	/* first reschedule or stop timer */
		1636	if (w->reschedule_cb)
		1637	{
		1638	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1639	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1640	ANHE_at_set (periodics [HEAP0]);
		1641	downheap (periodics, periodiccnt, HEAP0);
		1642	}
		1643	else if (w->interval)
		1644	{
		1645	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1646	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1647	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1648	ANHE_at_set (periodics [HEAP0]);
		1649	downheap (periodics, periodiccnt, HEAP0);
		1650	}
		1651	else
		1652	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1653
		1654	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1655	}
		1656	}
		1657
		1658	static void noinline
		1659	periodics_reschedule (EV_P)
		1660	{
		1661	int i;
		1662
		1663	/* adjust periodics after time jump */
		1664	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1665	{
		1666	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
		1667
		1668	if (w->reschedule_cb)
		1669	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1670	else if (w->interval)
		1671	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1672
		1673	ANHE_at_set (periodics [i]);
		1674	}
		1675
		1676	/* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */
		1677	for (i = periodiccnt >> 1; --i; )
		1678	downheap (periodics, periodiccnt, i + HEAP0);
		1679	}
		1680	#endif
		1681
		1682	void inline_speed
		1683	time_update (EV_P_ ev_tstamp max_block)
		1684	{
		1685	int i;
		1686
		1687	#if EV_USE_MONOTONIC
		1688	if (expect_true (have_monotonic))
		1689	{
		1690	ev_tstamp odiff = rtmn_diff;
		1691
1312	mn_now = get_clock ();	1692	mn_now = get_clock ();
1313		1693
		1694	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1695	/* interpolate in the meantime */
1314	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1696	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1315	{	1697	{
1316	ev_rt_now = rtmn_diff + mn_now;	1698	ev_rt_now = rtmn_diff + mn_now;
1317	return 0;	1699	return;
1318	}	1700	}
1319	else	1701
1320	{
1321	now_floor = mn_now;	1702	now_floor = mn_now;
1322	ev_rt_now = ev_time ();	1703	ev_rt_now = ev_time ();
1323	return 1;
1324	}
1325	}
1326		1704
1327	void inline_size	1705	/* loop a few times, before making important decisions.
1328	time_update (EV_P)	1706	* on the choice of "4": one iteration isn't enough,
1329	{	1707	* in case we get preempted during the calls to
1330	int i;	1708	* ev_time and get_clock. a second call is almost guaranteed
1331		1709	* to succeed in that case, though. and looping a few more times
1332	#if EV_USE_MONOTONIC	1710	* doesn't hurt either as we only do this on time-jumps or
1333	if (expect_true (have_monotonic))	1711	* in the unlikely event of having been preempted here.
1334	{	1712	*/
1335	if (time_update_monotonic (EV_A))	1713	for (i = 4; --i; )
1336	{	1714	{
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;	1715	rtmn_diff = ev_rt_now - mn_now;
1350		1716
1351	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1717	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1352	return; /* all is well */	1718	return; /* all is well */
1353		1719
1354	ev_rt_now = ev_time ();	1720	ev_rt_now = ev_time ();
1355	mn_now = get_clock ();	1721	mn_now = get_clock ();
1356	now_floor = mn_now;	1722	now_floor = mn_now;
1357	}	1723	}
1358		1724
1359	# if EV_PERIODIC_ENABLE	1725	# if EV_PERIODIC_ENABLE
1360	periodics_reschedule (EV_A);	1726	periodics_reschedule (EV_A);
1361	# endif	1727	# endif
1362	/* no timer adjustment, as the monotonic clock doesn't jump */	1728	/* no timer adjustment, as the monotonic clock doesn't jump */
1363	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1729	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1364	}
1365	}	1730	}
1366	else	1731	else
1367	#endif	1732	#endif
1368	{	1733	{
1369	ev_rt_now = ev_time ();	1734	ev_rt_now = ev_time ();
1370		1735
1371	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1736	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1372	{	1737	{
1373	#if EV_PERIODIC_ENABLE	1738	#if EV_PERIODIC_ENABLE
1374	periodics_reschedule (EV_A);	1739	periodics_reschedule (EV_A);
1375	#endif	1740	#endif
1376
1377	/* adjust timers. this is easy, as the offset is the same for all of them */	1741	/* adjust timers. this is easy, as the offset is the same for all of them */
1378	for (i = 0; i < timercnt; ++i)	1742	for (i = 0; i < timercnt; ++i)
		1743	{
		1744	ANHE *he = timers + i + HEAP0;
1379	((WT)timers [i])->at += ev_rt_now - mn_now;	1745	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1746	ANHE_at_set (*he);
		1747	}
1380	}	1748	}
1381		1749
1382	mn_now = ev_rt_now;	1750	mn_now = ev_rt_now;
1383	}	1751	}
1384	}	1752	}
…		…
1398	static int loop_done;	1766	static int loop_done;
1399		1767
1400	void	1768	void
1401	ev_loop (EV_P_ int flags)	1769	ev_loop (EV_P_ int flags)
1402	{	1770	{
1403	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1771	loop_done = EVUNLOOP_CANCEL;
1404	? EVUNLOOP_ONE
1405	: EVUNLOOP_CANCEL;
1406		1772
1407	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1773	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1408		1774
1409	do	1775	do
1410	{	1776	{
…		…
1444	/* update fd-related kernel structures */	1810	/* update fd-related kernel structures */
1445	fd_reify (EV_A);	1811	fd_reify (EV_A);
1446		1812
1447	/* calculate blocking time */	1813	/* calculate blocking time */
1448	{	1814	{
1449	ev_tstamp block;	1815	ev_tstamp waittime = 0.;
		1816	ev_tstamp sleeptime = 0.;
1450		1817
1451	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1818	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1452	block = 0.; /* do not block at all */
1453	else
1454	{	1819	{
1455	/* update time to cancel out callback processing overhead */	1820	/* 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);	1821	time_update (EV_A_ 1e100);
1459	else
1460	#endif
1461	{
1462	ev_rt_now = ev_time ();
1463	mn_now = ev_rt_now;
1464	}
1465		1822
1466	block = MAX_BLOCKTIME;	1823	waittime = MAX_BLOCKTIME;
1467		1824
1468	if (timercnt)	1825	if (timercnt)
1469	{	1826	{
1470	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1827	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1471	if (block > to) block = to;	1828	if (waittime > to) waittime = to;
1472	}	1829	}
1473		1830
1474	#if EV_PERIODIC_ENABLE	1831	#if EV_PERIODIC_ENABLE
1475	if (periodiccnt)	1832	if (periodiccnt)
1476	{	1833	{
1477	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1834	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1478	if (block > to) block = to;	1835	if (waittime > to) waittime = to;
1479	}	1836	}
1480	#endif	1837	#endif
1481		1838
1482	if (expect_false (block < 0.)) block = 0.;	1839	if (expect_false (waittime < timeout_blocktime))
		1840	waittime = timeout_blocktime;
		1841
		1842	sleeptime = waittime - backend_fudge;
		1843
		1844	if (expect_true (sleeptime > io_blocktime))
		1845	sleeptime = io_blocktime;
		1846
		1847	if (sleeptime)
		1848	{
		1849	ev_sleep (sleeptime);
		1850	waittime -= sleeptime;
		1851	}
1483	}	1852	}
1484		1853
1485	++loop_count;	1854	++loop_count;
1486	backend_poll (EV_A_ block);	1855	backend_poll (EV_A_ waittime);
		1856
		1857	/* update ev_rt_now, do magic */
		1858	time_update (EV_A_ waittime + sleeptime);
1487	}	1859	}
1488
1489	/* update ev_rt_now, do magic */
1490	time_update (EV_A);
1491		1860
1492	/* queue pending timers and reschedule them */	1861	/* queue pending timers and reschedule them */
1493	timers_reify (EV_A); /* relative timers called last */	1862	timers_reify (EV_A); /* relative timers called last */
1494	#if EV_PERIODIC_ENABLE	1863	#if EV_PERIODIC_ENABLE
1495	periodics_reify (EV_A); /* absolute timers called first */	1864	periodics_reify (EV_A); /* absolute timers called first */
…		…
1503	/* queue check watchers, to be executed first */	1872	/* queue check watchers, to be executed first */
1504	if (expect_false (checkcnt))	1873	if (expect_false (checkcnt))
1505	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1874	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1506		1875
1507	call_pending (EV_A);	1876	call_pending (EV_A);
1508
1509	}	1877	}
1510	while (expect_true (activecnt && !loop_done));	1878	while (expect_true (
		1879	activecnt
		1880	&& !loop_done
		1881	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1882	));
1511		1883
1512	if (loop_done == EVUNLOOP_ONE)	1884	if (loop_done == EVUNLOOP_ONE)
1513	loop_done = EVUNLOOP_CANCEL;	1885	loop_done = EVUNLOOP_CANCEL;
1514	}	1886	}
1515		1887
…		…
1606		1978
1607	assert (("ev_io_start called with negative fd", fd >= 0));	1979	assert (("ev_io_start called with negative fd", fd >= 0));
1608		1980
1609	ev_start (EV_A_ (W)w, 1);	1981	ev_start (EV_A_ (W)w, 1);
1610	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1982	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1611	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1983	wlist_add (&anfds[fd].head, (WL)w);
1612		1984
1613	fd_change (EV_A_ fd);	1985	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		1986	w->events &= ~EV_IOFDSET;
1614	}	1987	}
1615		1988
1616	void noinline	1989	void noinline
1617	ev_io_stop (EV_P_ ev_io *w)	1990	ev_io_stop (EV_P_ ev_io *w)
1618	{	1991	{
1619	clear_pending (EV_A_ (W)w);	1992	clear_pending (EV_A_ (W)w);
1620	if (expect_false (!ev_is_active (w)))	1993	if (expect_false (!ev_is_active (w)))
1621	return;	1994	return;
1622		1995
1623	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1996	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1624		1997
1625	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1998	wlist_del (&anfds[w->fd].head, (WL)w);
1626	ev_stop (EV_A_ (W)w);	1999	ev_stop (EV_A_ (W)w);
1627		2000
1628	fd_change (EV_A_ w->fd);	2001	fd_change (EV_A_ w->fd, 1);
1629	}	2002	}
1630		2003
1631	void noinline	2004	void noinline
1632	ev_timer_start (EV_P_ ev_timer *w)	2005	ev_timer_start (EV_P_ ev_timer *w)
1633	{	2006	{
1634	if (expect_false (ev_is_active (w)))	2007	if (expect_false (ev_is_active (w)))
1635	return;	2008	return;
1636		2009
1637	((WT)w)->at += mn_now;	2010	ev_at (w) += mn_now;
1638		2011
1639	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2012	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1640		2013
1641	ev_start (EV_A_ (W)w, ++timercnt);	2014	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1642	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	2015	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1643	timers [timercnt - 1] = w;	2016	ANHE_w (timers [ev_active (w)]) = (WT)w;
1644	upheap ((WT *)timers, timercnt - 1);	2017	ANHE_at_set (timers [ev_active (w)]);
		2018	upheap (timers, ev_active (w));
1645		2019
1646	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/	2020	/assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
1647	}	2021	}
1648		2022
1649	void noinline	2023	void noinline
1650	ev_timer_stop (EV_P_ ev_timer *w)	2024	ev_timer_stop (EV_P_ ev_timer *w)
1651	{	2025	{
1652	clear_pending (EV_A_ (W)w);	2026	clear_pending (EV_A_ (W)w);
1653	if (expect_false (!ev_is_active (w)))	2027	if (expect_false (!ev_is_active (w)))
1654	return;	2028	return;
1655		2029
1656	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1657
1658	{	2030	{
1659	int active = ((W)w)->active;	2031	int active = ev_active (w);
1660		2032
		2033	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2034
1661	if (expect_true (--active < --timercnt))	2035	if (expect_true (active < timercnt + HEAP0 - 1))
1662	{	2036	{
1663	timers [active] = timers [timercnt];	2037	timers [active] = timers [timercnt + HEAP0 - 1];
1664	adjustheap ((WT *)timers, timercnt, active);	2038	adjustheap (timers, timercnt, active);
1665	}	2039	}
		2040
		2041	--timercnt;
1666	}	2042	}
1667		2043
1668	((WT)w)->at -= mn_now;	2044	ev_at (w) -= mn_now;
1669		2045
1670	ev_stop (EV_A_ (W)w);	2046	ev_stop (EV_A_ (W)w);
1671	}	2047	}
1672		2048
1673	void noinline	2049	void noinline
…		…
1675	{	2051	{
1676	if (ev_is_active (w))	2052	if (ev_is_active (w))
1677	{	2053	{
1678	if (w->repeat)	2054	if (w->repeat)
1679	{	2055	{
1680	((WT)w)->at = mn_now + w->repeat;	2056	ev_at (w) = mn_now + w->repeat;
		2057	ANHE_at_set (timers [ev_active (w)]);
1681	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2058	adjustheap (timers, timercnt, ev_active (w));
1682	}	2059	}
1683	else	2060	else
1684	ev_timer_stop (EV_A_ w);	2061	ev_timer_stop (EV_A_ w);
1685	}	2062	}
1686	else if (w->repeat)	2063	else if (w->repeat)
1687	{	2064	{
1688	w->at = w->repeat;	2065	ev_at (w) = w->repeat;
1689	ev_timer_start (EV_A_ w);	2066	ev_timer_start (EV_A_ w);
1690	}	2067	}
1691	}	2068	}
1692		2069
1693	#if EV_PERIODIC_ENABLE	2070	#if EV_PERIODIC_ENABLE
…		…
1696	{	2073	{
1697	if (expect_false (ev_is_active (w)))	2074	if (expect_false (ev_is_active (w)))
1698	return;	2075	return;
1699		2076
1700	if (w->reschedule_cb)	2077	if (w->reschedule_cb)
1701	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2078	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1702	else if (w->interval)	2079	else if (w->interval)
1703	{	2080	{
1704	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2081	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 */	2082	/* 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;	2083	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1707	}	2084	}
1708	else	2085	else
1709	((WT)w)->at = w->offset;	2086	ev_at (w) = w->offset;
1710		2087
1711	ev_start (EV_A_ (W)w, ++periodiccnt);	2088	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1712	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2089	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1713	periodics [periodiccnt - 1] = w;	2090	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1714	upheap ((WT *)periodics, periodiccnt - 1);	2091	upheap (periodics, ev_active (w));
1715		2092
1716	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/	2093	/assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
1717	}	2094	}
1718		2095
1719	void noinline	2096	void noinline
1720	ev_periodic_stop (EV_P_ ev_periodic *w)	2097	ev_periodic_stop (EV_P_ ev_periodic *w)
1721	{	2098	{
1722	clear_pending (EV_A_ (W)w);	2099	clear_pending (EV_A_ (W)w);
1723	if (expect_false (!ev_is_active (w)))	2100	if (expect_false (!ev_is_active (w)))
1724	return;	2101	return;
1725		2102
1726	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1727
1728	{	2103	{
1729	int active = ((W)w)->active;	2104	int active = ev_active (w);
1730		2105
		2106	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2107
1731	if (expect_true (--active < --periodiccnt))	2108	if (expect_true (active < periodiccnt + HEAP0 - 1))
1732	{	2109	{
1733	periodics [active] = periodics [periodiccnt];	2110	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1734	adjustheap ((WT *)periodics, periodiccnt, active);	2111	adjustheap (periodics, periodiccnt, active);
1735	}	2112	}
		2113
		2114	--periodiccnt;
1736	}	2115	}
1737		2116
1738	ev_stop (EV_A_ (W)w);	2117	ev_stop (EV_A_ (W)w);
1739	}	2118	}
1740		2119
…		…
1760	if (expect_false (ev_is_active (w)))	2139	if (expect_false (ev_is_active (w)))
1761	return;	2140	return;
1762		2141
1763	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2142	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1764		2143
		2144	evpipe_init (EV_A);
		2145
		2146	{
		2147	#ifndef _WIN32
		2148	sigset_t full, prev;
		2149	sigfillset (&full);
		2150	sigprocmask (SIG_SETMASK, &full, &prev);
		2151	#endif
		2152
		2153	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2154
		2155	#ifndef _WIN32
		2156	sigprocmask (SIG_SETMASK, &prev, 0);
		2157	#endif
		2158	}
		2159
1765	ev_start (EV_A_ (W)w, 1);	2160	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);	2161	wlist_add (&signals [w->signum - 1].head, (WL)w);
1768		2162
1769	if (!((WL)w)->next)	2163	if (!((WL)w)->next)
1770	{	2164	{
1771	#if _WIN32	2165	#if _WIN32
1772	signal (w->signum, sighandler);	2166	signal (w->signum, ev_sighandler);
1773	#else	2167	#else
1774	struct sigaction sa;	2168	struct sigaction sa;
1775	sa.sa_handler = sighandler;	2169	sa.sa_handler = ev_sighandler;
1776	sigfillset (&sa.sa_mask);	2170	sigfillset (&sa.sa_mask);
1777	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2171	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1778	sigaction (w->signum, &sa, 0);	2172	sigaction (w->signum, &sa, 0);
1779	#endif	2173	#endif
1780	}	2174	}
…		…
1785	{	2179	{
1786	clear_pending (EV_A_ (W)w);	2180	clear_pending (EV_A_ (W)w);
1787	if (expect_false (!ev_is_active (w)))	2181	if (expect_false (!ev_is_active (w)))
1788	return;	2182	return;
1789		2183
1790	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2184	wlist_del (&signals [w->signum - 1].head, (WL)w);
1791	ev_stop (EV_A_ (W)w);	2185	ev_stop (EV_A_ (W)w);
1792		2186
1793	if (!signals [w->signum - 1].head)	2187	if (!signals [w->signum - 1].head)
1794	signal (w->signum, SIG_DFL);	2188	signal (w->signum, SIG_DFL);
1795	}	2189	}
…		…
1802	#endif	2196	#endif
1803	if (expect_false (ev_is_active (w)))	2197	if (expect_false (ev_is_active (w)))
1804	return;	2198	return;
1805		2199
1806	ev_start (EV_A_ (W)w, 1);	2200	ev_start (EV_A_ (W)w, 1);
1807	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2201	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1808	}	2202	}
1809		2203
1810	void	2204	void
1811	ev_child_stop (EV_P_ ev_child *w)	2205	ev_child_stop (EV_P_ ev_child *w)
1812	{	2206	{
1813	clear_pending (EV_A_ (W)w);	2207	clear_pending (EV_A_ (W)w);
1814	if (expect_false (!ev_is_active (w)))	2208	if (expect_false (!ev_is_active (w)))
1815	return;	2209	return;
1816		2210
1817	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2211	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1818	ev_stop (EV_A_ (W)w);	2212	ev_stop (EV_A_ (W)w);
1819	}	2213	}
1820		2214
1821	#if EV_STAT_ENABLE	2215	#if EV_STAT_ENABLE
1822		2216
…		…
1841	if (w->wd < 0)	2235	if (w->wd < 0)
1842	{	2236	{
1843	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2237	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1844		2238
1845	/* monitor some parent directory for speedup hints */	2239	/* monitor some parent directory for speedup hints */
		2240	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2241	/* but an efficiency issue only */
1846	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2242	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
1847	{	2243	{
1848	char path [4096];	2244	char path [4096];
1849	strcpy (path, w->path);	2245	strcpy (path, w->path);
1850		2246
…		…
2095	clear_pending (EV_A_ (W)w);	2491	clear_pending (EV_A_ (W)w);
2096	if (expect_false (!ev_is_active (w)))	2492	if (expect_false (!ev_is_active (w)))
2097	return;	2493	return;
2098		2494
2099	{	2495	{
2100	int active = ((W)w)->active;	2496	int active = ev_active (w);
2101		2497
2102	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2498	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2103	((W)idles [ABSPRI (w)][active - 1])->active = active;	2499	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2104		2500
2105	ev_stop (EV_A_ (W)w);	2501	ev_stop (EV_A_ (W)w);
2106	--idleall;	2502	--idleall;
2107	}	2503	}
2108	}	2504	}
…		…
2125	clear_pending (EV_A_ (W)w);	2521	clear_pending (EV_A_ (W)w);
2126	if (expect_false (!ev_is_active (w)))	2522	if (expect_false (!ev_is_active (w)))
2127	return;	2523	return;
2128		2524
2129	{	2525	{
2130	int active = ((W)w)->active;	2526	int active = ev_active (w);
		2527
2131	prepares [active - 1] = prepares [--preparecnt];	2528	prepares [active - 1] = prepares [--preparecnt];
2132	((W)prepares [active - 1])->active = active;	2529	ev_active (prepares [active - 1]) = active;
2133	}	2530	}
2134		2531
2135	ev_stop (EV_A_ (W)w);	2532	ev_stop (EV_A_ (W)w);
2136	}	2533	}
2137		2534
…		…
2152	clear_pending (EV_A_ (W)w);	2549	clear_pending (EV_A_ (W)w);
2153	if (expect_false (!ev_is_active (w)))	2550	if (expect_false (!ev_is_active (w)))
2154	return;	2551	return;
2155		2552
2156	{	2553	{
2157	int active = ((W)w)->active;	2554	int active = ev_active (w);
		2555
2158	checks [active - 1] = checks [--checkcnt];	2556	checks [active - 1] = checks [--checkcnt];
2159	((W)checks [active - 1])->active = active;	2557	ev_active (checks [active - 1]) = active;
2160	}	2558	}
2161		2559
2162	ev_stop (EV_A_ (W)w);	2560	ev_stop (EV_A_ (W)w);
2163	}	2561	}
2164		2562
2165	#if EV_EMBED_ENABLE	2563	#if EV_EMBED_ENABLE
2166	void noinline	2564	void noinline
2167	ev_embed_sweep (EV_P_ ev_embed *w)	2565	ev_embed_sweep (EV_P_ ev_embed *w)
2168	{	2566	{
2169	ev_loop (w->loop, EVLOOP_NONBLOCK);	2567	ev_loop (w->other, EVLOOP_NONBLOCK);
2170	}	2568	}
2171		2569
2172	static void	2570	static void
2173	embed_cb (EV_P_ ev_io *io, int revents)	2571	embed_io_cb (EV_P_ ev_io *io, int revents)
2174	{	2572	{
2175	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2573	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2176		2574
2177	if (ev_cb (w))	2575	if (ev_cb (w))
2178	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2576	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2179	else	2577	else
2180	ev_embed_sweep (loop, w);	2578	ev_loop (w->other, EVLOOP_NONBLOCK);
2181	}	2579	}
		2580
		2581	static void
		2582	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2583	{
		2584	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2585
		2586	{
		2587	struct ev_loop *loop = w->other;
		2588
		2589	while (fdchangecnt)
		2590	{
		2591	fd_reify (EV_A);
		2592	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2593	}
		2594	}
		2595	}
		2596
		2597	#if 0
		2598	static void
		2599	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2600	{
		2601	ev_idle_stop (EV_A_ idle);
		2602	}
		2603	#endif
2182		2604
2183	void	2605	void
2184	ev_embed_start (EV_P_ ev_embed *w)	2606	ev_embed_start (EV_P_ ev_embed *w)
2185	{	2607	{
2186	if (expect_false (ev_is_active (w)))	2608	if (expect_false (ev_is_active (w)))
2187	return;	2609	return;
2188		2610
2189	{	2611	{
2190	struct ev_loop *loop = w->loop;	2612	struct ev_loop *loop = w->other;
2191	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2613	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2192	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2614	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2193	}	2615	}
2194		2616
2195	ev_set_priority (&w->io, ev_priority (w));	2617	ev_set_priority (&w->io, ev_priority (w));
2196	ev_io_start (EV_A_ &w->io);	2618	ev_io_start (EV_A_ &w->io);
		2619
		2620	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2621	ev_set_priority (&w->prepare, EV_MINPRI);
		2622	ev_prepare_start (EV_A_ &w->prepare);
		2623
		2624	/ev_idle_init (&w->idle, e,bed_idle_cb);/
2197		2625
2198	ev_start (EV_A_ (W)w, 1);	2626	ev_start (EV_A_ (W)w, 1);
2199	}	2627	}
2200		2628
2201	void	2629	void
…		…
2204	clear_pending (EV_A_ (W)w);	2632	clear_pending (EV_A_ (W)w);
2205	if (expect_false (!ev_is_active (w)))	2633	if (expect_false (!ev_is_active (w)))
2206	return;	2634	return;
2207		2635
2208	ev_io_stop (EV_A_ &w->io);	2636	ev_io_stop (EV_A_ &w->io);
		2637	ev_prepare_stop (EV_A_ &w->prepare);
2209		2638
2210	ev_stop (EV_A_ (W)w);	2639	ev_stop (EV_A_ (W)w);
2211	}	2640	}
2212	#endif	2641	#endif
2213		2642
…		…
2229	clear_pending (EV_A_ (W)w);	2658	clear_pending (EV_A_ (W)w);
2230	if (expect_false (!ev_is_active (w)))	2659	if (expect_false (!ev_is_active (w)))
2231	return;	2660	return;
2232		2661
2233	{	2662	{
2234	int active = ((W)w)->active;	2663	int active = ev_active (w);
		2664
2235	forks [active - 1] = forks [--forkcnt];	2665	forks [active - 1] = forks [--forkcnt];
2236	((W)forks [active - 1])->active = active;	2666	ev_active (forks [active - 1]) = active;
2237	}	2667	}
2238		2668
2239	ev_stop (EV_A_ (W)w);	2669	ev_stop (EV_A_ (W)w);
		2670	}
		2671	#endif
		2672
		2673	#if EV_ASYNC_ENABLE
		2674	void
		2675	ev_async_start (EV_P_ ev_async *w)
		2676	{
		2677	if (expect_false (ev_is_active (w)))
		2678	return;
		2679
		2680	evpipe_init (EV_A);
		2681
		2682	ev_start (EV_A_ (W)w, ++asynccnt);
		2683	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2684	asyncs [asynccnt - 1] = w;
		2685	}
		2686
		2687	void
		2688	ev_async_stop (EV_P_ ev_async *w)
		2689	{
		2690	clear_pending (EV_A_ (W)w);
		2691	if (expect_false (!ev_is_active (w)))
		2692	return;
		2693
		2694	{
		2695	int active = ev_active (w);
		2696
		2697	asyncs [active - 1] = asyncs [--asynccnt];
		2698	ev_active (asyncs [active - 1]) = active;
		2699	}
		2700
		2701	ev_stop (EV_A_ (W)w);
		2702	}
		2703
		2704	void
		2705	ev_async_send (EV_P_ ev_async *w)
		2706	{
		2707	w->sent = 1;
		2708	evpipe_write (EV_A_ &gotasync);
2240	}	2709	}
2241	#endif	2710	#endif
2242		2711
2243	/*****************************************************************************/	2712	/*****************************************************************************/
2244		2713
…		…
2302	ev_timer_set (&once->to, timeout, 0.);	2771	ev_timer_set (&once->to, timeout, 0.);
2303	ev_timer_start (EV_A_ &once->to);	2772	ev_timer_start (EV_A_ &once->to);
2304	}	2773	}
2305	}	2774	}
2306		2775
		2776	#if EV_MULTIPLICITY
		2777	#include "ev_wrap.h"
		2778	#endif
		2779
2307	#ifdef __cplusplus	2780	#ifdef __cplusplus
2308	}	2781	}
2309	#endif	2782	#endif
2310		2783

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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 1.242 by root, Fri May 9 14:07:19 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 1.242 by root, Fri May 9 14:07:19 2008 UTC