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Comparing libev/ev.c (file contents):
Revision 1.134 by root, Fri Nov 23 19:13:33 2007 UTC vs.
Revision 1.256 by root, Thu Jun 19 06:53:49 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
…		…
94	# else	111	# else
95	# define EV_USE_PORT 0	112	# define EV_USE_PORT 0
96	# endif	113	# endif
97	# endif	114	# endif
98		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		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
99	#endif	132	#endif
100		133
101	#include <math.h>	134	#include <math.h>
102	#include <stdlib.h>	135	#include <stdlib.h>
103	#include <fcntl.h>	136	#include <fcntl.h>
…		…
110	#include <sys/types.h>	143	#include <sys/types.h>
111	#include <time.h>	144	#include <time.h>
112		145
113	#include <signal.h>	146	#include <signal.h>
114		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
115	#ifndef _WIN32	154	#ifndef _WIN32
116	# include <unistd.h>
117	# include <sys/time.h>	155	# include <sys/time.h>
118	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
119	#else	158	#else
		159	# include <io.h>
120	# define WIN32_LEAN_AND_MEAN	160	# define WIN32_LEAN_AND_MEAN
121	# include <windows.h>	161	# include <windows.h>
122	# ifndef EV_SELECT_IS_WINSOCKET	162	# ifndef EV_SELECT_IS_WINSOCKET
123	# define EV_SELECT_IS_WINSOCKET 1	163	# define EV_SELECT_IS_WINSOCKET 1
124	# endif	164	# endif
125	#endif	165	#endif
126		166
127	/**/	167	/* this block tries to deduce configuration from header-defined symbols and defaults */
128		168
129	#ifndef EV_USE_MONOTONIC	169	#ifndef EV_USE_MONOTONIC
		170	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
		171	# define EV_USE_MONOTONIC 1
		172	# else
130	# define EV_USE_MONOTONIC 0	173	# define EV_USE_MONOTONIC 0
		174	# endif
131	#endif	175	#endif
132		176
133	#ifndef EV_USE_REALTIME	177	#ifndef EV_USE_REALTIME
134	# define EV_USE_REALTIME 0	178	# define EV_USE_REALTIME 0
		179	#endif
		180
		181	#ifndef EV_USE_NANOSLEEP
		182	# if _POSIX_C_SOURCE >= 199309L
		183	# define EV_USE_NANOSLEEP 1
		184	# else
		185	# define EV_USE_NANOSLEEP 0
		186	# endif
135	#endif	187	#endif
136		188
137	#ifndef EV_USE_SELECT	189	#ifndef EV_USE_SELECT
138	# define EV_USE_SELECT 1	190	# define EV_USE_SELECT 1
139	#endif	191	#endif
…		…
145	# define EV_USE_POLL 1	197	# define EV_USE_POLL 1
146	# endif	198	# endif
147	#endif	199	#endif
148		200
149	#ifndef EV_USE_EPOLL	201	#ifndef EV_USE_EPOLL
		202	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		203	# define EV_USE_EPOLL 1
		204	# else
150	# define EV_USE_EPOLL 0	205	# define EV_USE_EPOLL 0
		206	# endif
151	#endif	207	#endif
152		208
153	#ifndef EV_USE_KQUEUE	209	#ifndef EV_USE_KQUEUE
154	# define EV_USE_KQUEUE 0	210	# define EV_USE_KQUEUE 0
155	#endif	211	#endif
156		212
157	#ifndef EV_USE_PORT	213	#ifndef EV_USE_PORT
158	# define EV_USE_PORT 0	214	# define EV_USE_PORT 0
159	#endif	215	#endif
160		216
161	/**/	217	#ifndef EV_USE_INOTIFY
		218	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		219	# define EV_USE_INOTIFY 1
		220	# else
		221	# define EV_USE_INOTIFY 0
		222	# endif
		223	#endif
		224
		225	#ifndef EV_PID_HASHSIZE
		226	# if EV_MINIMAL
		227	# define EV_PID_HASHSIZE 1
		228	# else
		229	# define EV_PID_HASHSIZE 16
		230	# endif
		231	#endif
		232
		233	#ifndef EV_INOTIFY_HASHSIZE
		234	# if EV_MINIMAL
		235	# define EV_INOTIFY_HASHSIZE 1
		236	# else
		237	# define EV_INOTIFY_HASHSIZE 16
		238	# endif
		239	#endif
		240
		241	#ifndef EV_USE_EVENTFD
		242	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		243	# define EV_USE_EVENTFD 1
		244	# else
		245	# define EV_USE_EVENTFD 0
		246	# endif
		247	#endif
		248
		249	#if 0 /* debugging */
		250	# define EV_VERIFY 3
		251	# define EV_USE_4HEAP 1
		252	# define EV_HEAP_CACHE_AT 1
		253	#endif
		254
		255	#ifndef EV_VERIFY
		256	# define EV_VERIFY !EV_MINIMAL
		257	#endif
		258
		259	#ifndef EV_USE_4HEAP
		260	# define EV_USE_4HEAP !EV_MINIMAL
		261	#endif
		262
		263	#ifndef EV_HEAP_CACHE_AT
		264	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		265	#endif
		266
		267	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
162		268
163	#ifndef CLOCK_MONOTONIC	269	#ifndef CLOCK_MONOTONIC
164	# undef EV_USE_MONOTONIC	270	# undef EV_USE_MONOTONIC
165	# define EV_USE_MONOTONIC 0	271	# define EV_USE_MONOTONIC 0
166	#endif	272	#endif
…		…
168	#ifndef CLOCK_REALTIME	274	#ifndef CLOCK_REALTIME
169	# undef EV_USE_REALTIME	275	# undef EV_USE_REALTIME
170	# define EV_USE_REALTIME 0	276	# define EV_USE_REALTIME 0
171	#endif	277	#endif
172		278
		279	#if !EV_STAT_ENABLE
		280	# undef EV_USE_INOTIFY
		281	# define EV_USE_INOTIFY 0
		282	#endif
		283
		284	#if !EV_USE_NANOSLEEP
		285	# ifndef _WIN32
		286	# include <sys/select.h>
		287	# endif
		288	#endif
		289
		290	#if EV_USE_INOTIFY
		291	# include <sys/inotify.h>
		292	#endif
		293
173	#if EV_SELECT_IS_WINSOCKET	294	#if EV_SELECT_IS_WINSOCKET
174	# include <winsock.h>	295	# include <winsock.h>
175	#endif	296	#endif
176		297
		298	#if EV_USE_EVENTFD
		299	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		300	# include <stdint.h>
		301	# ifdef __cplusplus
		302	extern "C" {
		303	# endif
		304	int eventfd (unsigned int initval, int flags);
		305	# ifdef __cplusplus
		306	}
		307	# endif
		308	#endif
		309
177	/**/	310	/**/
		311
		312	#if EV_VERIFY >= 3
		313	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		314	#else
		315	# define EV_FREQUENT_CHECK do { } while (0)
		316	#endif
		317
		318	/*
		319	* This is used to avoid floating point rounding problems.
		320	* It is added to ev_rt_now when scheduling periodics
		321	* to ensure progress, time-wise, even when rounding
		322	* errors are against us.
		323	* This value is good at least till the year 4000.
		324	* Better solutions welcome.
		325	*/
		326	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
178		327
179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	328	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	329	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	330	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
183		331
184	#ifdef EV_H
185	# include EV_H
186	#else
187	# include "ev.h"
188	#endif
189
190	#if __GNUC__ >= 3	332	#if __GNUC__ >= 4
191	# define expect(expr,value) __builtin_expect ((expr),(value))	333	# define expect(expr,value) __builtin_expect ((expr),(value))
192	# define inline static inline	334	# define noinline __attribute__ ((noinline))
193	#else	335	#else
194	# define expect(expr,value) (expr)	336	# define expect(expr,value) (expr)
195	# define inline static	337	# define noinline
		338	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		339	# define inline
		340	# endif
196	#endif	341	#endif
197		342
198	#define expect_false(expr) expect ((expr) != 0, 0)	343	#define expect_false(expr) expect ((expr) != 0, 0)
199	#define expect_true(expr) expect ((expr) != 0, 1)	344	#define expect_true(expr) expect ((expr) != 0, 1)
		345	#define inline_size static inline
		346
		347	#if EV_MINIMAL
		348	# define inline_speed static noinline
		349	#else
		350	# define inline_speed static inline
		351	#endif
200		352
201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	353	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	354	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
203		355
204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	356	#define EMPTY /* required for microsofts broken pseudo-c compiler */
205	#define EMPTY2(a,b) /* used to suppress some warnings */	357	#define EMPTY2(a,b) /* used to suppress some warnings */
206		358
207	typedef struct ev_watcher *W;	359	typedef ev_watcher *W;
208	typedef struct ev_watcher_list *WL;	360	typedef ev_watcher_list *WL;
209	typedef struct ev_watcher_time *WT;	361	typedef ev_watcher_time *WT;
210		362
		363	#define ev_active(w) ((W)(w))->active
		364	#define ev_at(w) ((WT)(w))->at
		365
		366	#if EV_USE_MONOTONIC
		367	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		368	/* giving it a reasonably high chance of working on typical architetcures */
211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	369	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		370	#endif
212		371
213	#ifdef _WIN32	372	#ifdef _WIN32
214	# include "ev_win32.c"	373	# include "ev_win32.c"
215	#endif	374	#endif
216		375
217	/*****************************************************************************/	376	/*****************************************************************************/
218		377
219	static void (*syserr_cb)(const char *msg);	378	static void (*syserr_cb)(const char *msg);
220		379
		380	void
221	void ev_set_syserr_cb (void (*cb)(const char *msg))	381	ev_set_syserr_cb (void (*cb)(const char *msg))
222	{	382	{
223	syserr_cb = cb;	383	syserr_cb = cb;
224	}	384	}
225		385
226	static void	386	static void noinline
227	syserr (const char *msg)	387	syserr (const char *msg)
228	{	388	{
229	if (!msg)	389	if (!msg)
230	msg = "(libev) system error";	390	msg = "(libev) system error";
231		391
…		…
236	perror (msg);	396	perror (msg);
237	abort ();	397	abort ();
238	}	398	}
239	}	399	}
240		400
		401	static void *
		402	ev_realloc_emul (void *ptr, long size)
		403	{
		404	/* some systems, notably openbsd and darwin, fail to properly
		405	* implement realloc (x, 0) (as required by both ansi c-98 and
		406	* the single unix specification, so work around them here.
		407	*/
		408
		409	if (size)
		410	return realloc (ptr, size);
		411
		412	free (ptr);
		413	return 0;
		414	}
		415
241	static void *(*alloc)(void *ptr, long size);	416	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
242		417
		418	void
243	void ev_set_allocator (void *(*cb)(void *ptr, long size))	419	ev_set_allocator (void *(*cb)(void *ptr, long size))
244	{	420	{
245	alloc = cb;	421	alloc = cb;
246	}	422	}
247		423
248	static void *	424	inline_speed void *
249	ev_realloc (void *ptr, long size)	425	ev_realloc (void *ptr, long size)
250	{	426	{
251	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	427	ptr = alloc (ptr, size);
252		428
253	if (!ptr && size)	429	if (!ptr && size)
254	{	430	{
255	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	431	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
256	abort ();	432	abort ();
…		…
277	typedef struct	453	typedef struct
278	{	454	{
279	W w;	455	W w;
280	int events;	456	int events;
281	} ANPENDING;	457	} ANPENDING;
		458
		459	#if EV_USE_INOTIFY
		460	/* hash table entry per inotify-id */
		461	typedef struct
		462	{
		463	WL head;
		464	} ANFS;
		465	#endif
		466
		467	/* Heap Entry */
		468	#if EV_HEAP_CACHE_AT
		469	typedef struct {
		470	ev_tstamp at;
		471	WT w;
		472	} ANHE;
		473
		474	#define ANHE_w(he) (he).w /* access watcher, read-write */
		475	#define ANHE_at(he) (he).at /* access cached at, read-only */
		476	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		477	#else
		478	typedef WT ANHE;
		479
		480	#define ANHE_w(he) (he)
		481	#define ANHE_at(he) (he)->at
		482	#define ANHE_at_cache(he)
		483	#endif
282		484
283	#if EV_MULTIPLICITY	485	#if EV_MULTIPLICITY
284		486
285	struct ev_loop	487	struct ev_loop
286	{	488	{
…		…
320	gettimeofday (&tv, 0);	522	gettimeofday (&tv, 0);
321	return tv.tv_sec + tv.tv_usec * 1e-6;	523	return tv.tv_sec + tv.tv_usec * 1e-6;
322	#endif	524	#endif
323	}	525	}
324		526
325	inline ev_tstamp	527	ev_tstamp inline_size
326	get_clock (void)	528	get_clock (void)
327	{	529	{
328	#if EV_USE_MONOTONIC	530	#if EV_USE_MONOTONIC
329	if (expect_true (have_monotonic))	531	if (expect_true (have_monotonic))
330	{	532	{
…		…
343	{	545	{
344	return ev_rt_now;	546	return ev_rt_now;
345	}	547	}
346	#endif	548	#endif
347		549
348	#define array_roundsize(type,n) (((n) | 4) & ~3)	550	void
		551	ev_sleep (ev_tstamp delay)
		552	{
		553	if (delay > 0.)
		554	{
		555	#if EV_USE_NANOSLEEP
		556	struct timespec ts;
		557
		558	ts.tv_sec = (time_t)delay;
		559	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		560
		561	nanosleep (&ts, 0);
		562	#elif defined(_WIN32)
		563	Sleep ((unsigned long)(delay * 1e3));
		564	#else
		565	struct timeval tv;
		566
		567	tv.tv_sec = (time_t)delay;
		568	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		569
		570	select (0, 0, 0, 0, &tv);
		571	#endif
		572	}
		573	}
		574
		575	/*****************************************************************************/
		576
		577	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		578
		579	int inline_size
		580	array_nextsize (int elem, int cur, int cnt)
		581	{
		582	int ncur = cur + 1;
		583
		584	do
		585	ncur <<= 1;
		586	while (cnt > ncur);
		587
		588	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		589	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		590	{
		591	ncur *= elem;
		592	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		593	ncur = ncur - sizeof (void *) * 4;
		594	ncur /= elem;
		595	}
		596
		597	return ncur;
		598	}
		599
		600	static noinline void *
		601	array_realloc (int elem, void *base, int *cur, int cnt)
		602	{
		603	*cur = array_nextsize (elem, *cur, cnt);
		604	return ev_realloc (base, elem * *cur);
		605	}
349		606
350	#define array_needsize(type,base,cur,cnt,init) \	607	#define array_needsize(type,base,cur,cnt,init) \
351	if (expect_false ((cnt) > cur)) \	608	if (expect_false ((cnt) > (cur))) \
352	{ \	609	{ \
353	int newcnt = cur; \	610	int ocur_ = (cur); \
354	do \	611	(base) = (type *)array_realloc \
355	{ \	612	(sizeof (type), (base), &(cur), (cnt)); \
356	newcnt = array_roundsize (type, newcnt << 1); \	613	init ((base) + (ocur_), (cur) - ocur_); \
357	} \
358	while ((cnt) > newcnt); \
359	\
360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
361	init (base + cur, newcnt - cur); \
362	cur = newcnt; \
363	}	614	}
364		615
		616	#if 0
365	#define array_slim(type,stem) \	617	#define array_slim(type,stem) \
366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	618	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
367	{ \	619	{ \
368	stem ## max = array_roundsize (stem ## cnt >> 1); \	620	stem ## max = array_roundsize (stem ## cnt >> 1); \
369	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	621	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	622	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
371	}	623	}
		624	#endif
372		625
373	#define array_free(stem, idx) \	626	#define array_free(stem, idx) \
374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	627	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
375		628
376	/*****************************************************************************/	629	/*****************************************************************************/
377		630
378	static void	631	void noinline
		632	ev_feed_event (EV_P_ void *w, int revents)
		633	{
		634	W w_ = (W)w;
		635	int pri = ABSPRI (w_);
		636
		637	if (expect_false (w_->pending))
		638	pendings [pri][w_->pending - 1].events |= revents;
		639	else
		640	{
		641	w_->pending = ++pendingcnt [pri];
		642	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		643	pendings [pri][w_->pending - 1].w = w_;
		644	pendings [pri][w_->pending - 1].events = revents;
		645	}
		646	}
		647
		648	void inline_speed
		649	queue_events (EV_P_ W *events, int eventcnt, int type)
		650	{
		651	int i;
		652
		653	for (i = 0; i < eventcnt; ++i)
		654	ev_feed_event (EV_A_ events [i], type);
		655	}
		656
		657	/*****************************************************************************/
		658
		659	void inline_size
379	anfds_init (ANFD *base, int count)	660	anfds_init (ANFD *base, int count)
380	{	661	{
381	while (count--)	662	while (count--)
382	{	663	{
383	base->head = 0;	664	base->head = 0;
…		…
386		667
387	++base;	668	++base;
388	}	669	}
389	}	670	}
390		671
391	void	672	void inline_speed
392	ev_feed_event (EV_P_ void *w, int revents)
393	{
394	W w_ = (W)w;
395
396	if (expect_false (w_->pending))
397	{
398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
399	return;
400	}
401
402	if (expect_false (!w_->cb))
403	return;
404
405	w_->pending = ++pendingcnt [ABSPRI (w_)];
406	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
407	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
408	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
409	}
410
411	static void
412	queue_events (EV_P_ W *events, int eventcnt, int type)
413	{
414	int i;
415
416	for (i = 0; i < eventcnt; ++i)
417	ev_feed_event (EV_A_ events [i], type);
418	}
419
420	inline void
421	fd_event (EV_P_ int fd, int revents)	673	fd_event (EV_P_ int fd, int revents)
422	{	674	{
423	ANFD *anfd = anfds + fd;	675	ANFD *anfd = anfds + fd;
424	struct ev_io *w;	676	ev_io *w;
425		677
426	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	678	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
427	{	679	{
428	int ev = w->events & revents;	680	int ev = w->events & revents;
429		681
430	if (ev)	682	if (ev)
431	ev_feed_event (EV_A_ (W)w, ev);	683	ev_feed_event (EV_A_ (W)w, ev);
…		…
433	}	685	}
434		686
435	void	687	void
436	ev_feed_fd_event (EV_P_ int fd, int revents)	688	ev_feed_fd_event (EV_P_ int fd, int revents)
437	{	689	{
		690	if (fd >= 0 && fd < anfdmax)
438	fd_event (EV_A_ fd, revents);	691	fd_event (EV_A_ fd, revents);
439	}	692	}
440		693
441	/*****************************************************************************/	694	void inline_size
442
443	inline void
444	fd_reify (EV_P)	695	fd_reify (EV_P)
445	{	696	{
446	int i;	697	int i;
447		698
448	for (i = 0; i < fdchangecnt; ++i)	699	for (i = 0; i < fdchangecnt; ++i)
449	{	700	{
450	int fd = fdchanges [i];	701	int fd = fdchanges [i];
451	ANFD *anfd = anfds + fd;	702	ANFD *anfd = anfds + fd;
452	struct ev_io *w;	703	ev_io *w;
453		704
454	int events = 0;	705	unsigned char events = 0;
455		706
456	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	707	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
457	events |= w->events;	708	events |= (unsigned char)w->events;
458		709
459	#if EV_SELECT_IS_WINSOCKET	710	#if EV_SELECT_IS_WINSOCKET
460	if (events)	711	if (events)
461	{	712	{
462	unsigned long argp;	713	unsigned long arg;
		714	#ifdef EV_FD_TO_WIN32_HANDLE
		715	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		716	#else
463	anfd->handle = _get_osfhandle (fd);	717	anfd->handle = _get_osfhandle (fd);
		718	#endif
464	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	719	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
465	}	720	}
466	#endif	721	#endif
467		722
		723	{
		724	unsigned char o_events = anfd->events;
		725	unsigned char o_reify = anfd->reify;
		726
468	anfd->reify = 0;	727	anfd->reify = 0;
469
470	backend_modify (EV_A_ fd, anfd->events, events);
471	anfd->events = events;	728	anfd->events = events;
		729
		730	if (o_events != events || o_reify & EV_IOFDSET)
		731	backend_modify (EV_A_ fd, o_events, events);
		732	}
472	}	733	}
473		734
474	fdchangecnt = 0;	735	fdchangecnt = 0;
475	}	736	}
476		737
477	static void	738	void inline_size
478	fd_change (EV_P_ int fd)	739	fd_change (EV_P_ int fd, int flags)
479	{	740	{
480	if (expect_false (anfds [fd].reify))	741	unsigned char reify = anfds [fd].reify;
481	return;
482
483	anfds [fd].reify = 1;	742	anfds [fd].reify |= flags;
484		743
		744	if (expect_true (!reify))
		745	{
485	++fdchangecnt;	746	++fdchangecnt;
486	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	747	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
487	fdchanges [fdchangecnt - 1] = fd;	748	fdchanges [fdchangecnt - 1] = fd;
		749	}
488	}	750	}
489		751
490	static void	752	void inline_speed
491	fd_kill (EV_P_ int fd)	753	fd_kill (EV_P_ int fd)
492	{	754	{
493	struct ev_io *w;	755	ev_io *w;
494		756
495	while ((w = (struct ev_io *)anfds [fd].head))	757	while ((w = (ev_io *)anfds [fd].head))
496	{	758	{
497	ev_io_stop (EV_A_ w);	759	ev_io_stop (EV_A_ w);
498	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	760	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
499	}	761	}
500	}	762	}
501		763
502	inline int	764	int inline_size
503	fd_valid (int fd)	765	fd_valid (int fd)
504	{	766	{
505	#ifdef _WIN32	767	#ifdef _WIN32
506	return _get_osfhandle (fd) != -1;	768	return _get_osfhandle (fd) != -1;
507	#else	769	#else
508	return fcntl (fd, F_GETFD) != -1;	770	return fcntl (fd, F_GETFD) != -1;
509	#endif	771	#endif
510	}	772	}
511		773
512	/* called on EBADF to verify fds */	774	/* called on EBADF to verify fds */
513	static void	775	static void noinline
514	fd_ebadf (EV_P)	776	fd_ebadf (EV_P)
515	{	777	{
516	int fd;	778	int fd;
517		779
518	for (fd = 0; fd < anfdmax; ++fd)	780	for (fd = 0; fd < anfdmax; ++fd)
519	if (anfds [fd].events)	781	if (anfds [fd].events)
520	if (!fd_valid (fd) == -1 && errno == EBADF)	782	if (!fd_valid (fd) && errno == EBADF)
521	fd_kill (EV_A_ fd);	783	fd_kill (EV_A_ fd);
522	}	784	}
523		785
524	/* called on ENOMEM in select/poll to kill some fds and retry */	786	/* called on ENOMEM in select/poll to kill some fds and retry */
525	static void	787	static void noinline
526	fd_enomem (EV_P)	788	fd_enomem (EV_P)
527	{	789	{
528	int fd;	790	int fd;
529		791
530	for (fd = anfdmax; fd--; )	792	for (fd = anfdmax; fd--; )
…		…
534	return;	796	return;
535	}	797	}
536	}	798	}
537		799
538	/* usually called after fork if backend needs to re-arm all fds from scratch */	800	/* usually called after fork if backend needs to re-arm all fds from scratch */
539	static void	801	static void noinline
540	fd_rearm_all (EV_P)	802	fd_rearm_all (EV_P)
541	{	803	{
542	int fd;	804	int fd;
543		805
544	/* this should be highly optimised to not do anything but set a flag */
545	for (fd = 0; fd < anfdmax; ++fd)	806	for (fd = 0; fd < anfdmax; ++fd)
546	if (anfds [fd].events)	807	if (anfds [fd].events)
547	{	808	{
548	anfds [fd].events = 0;	809	anfds [fd].events = 0;
549	fd_change (EV_A_ fd);	810	fd_change (EV_A_ fd, EV_IOFDSET | 1);
550	}	811	}
551	}	812	}
552		813
553	/*****************************************************************************/	814	/*****************************************************************************/
554		815
555	static void	816	/*
556	upheap (WT *heap, int k)	817	* the heap functions want a real array index. array index 0 uis guaranteed to not
557	{	818	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
558	WT w = heap [k];	819	* the branching factor of the d-tree.
		820	*/
559		821
560	while (k && heap [k >> 1]->at > w->at)	822	/*
561	{	823	* at the moment we allow libev the luxury of two heaps,
562	heap [k] = heap [k >> 1];	824	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
563	((W)heap [k])->active = k + 1;	825	* which is more cache-efficient.
564	k >>= 1;	826	* the difference is about 5% with 50000+ watchers.
565	}	827	*/
		828	#if EV_USE_4HEAP
566		829
567	heap [k] = w;	830	#define DHEAP 4
568	((W)heap [k])->active = k + 1;	831	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		832	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		833	#define UPHEAP_DONE(p,k) ((p) == (k))
569		834
570	}	835	/* away from the root */
571		836	void inline_speed
572	static void
573	downheap (WT *heap, int N, int k)	837	downheap (ANHE *heap, int N, int k)
574	{	838	{
575	WT w = heap [k];	839	ANHE he = heap [k];
		840	ANHE *E = heap + N + HEAP0;
576		841
577	while (k < (N >> 1))	842	for (;;)
578	{	843	{
579	int j = k << 1;	844	ev_tstamp minat;
		845	ANHE *minpos;
		846	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
580		847
581	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	848	/* find minimum child */
		849	if (expect_true (pos + DHEAP - 1 < E))
582	++j;	850	{
583		851	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
584	if (w->at <= heap [j]->at)	852	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		853	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		854	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		855	}
		856	else if (pos < E)
		857	{
		858	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		859	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		860	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		861	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		862	}
		863	else
585	break;	864	break;
586		865
		866	if (ANHE_at (he) <= minat)
		867	break;
		868
		869	heap [k] = *minpos;
		870	ev_active (ANHE_w (*minpos)) = k;
		871
		872	k = minpos - heap;
		873	}
		874
		875	heap [k] = he;
		876	ev_active (ANHE_w (he)) = k;
		877	}
		878
		879	#else /* 4HEAP */
		880
		881	#define HEAP0 1
		882	#define HPARENT(k) ((k) >> 1)
		883	#define UPHEAP_DONE(p,k) (!(p))
		884
		885	/* away from the root */
		886	void inline_speed
		887	downheap (ANHE *heap, int N, int k)
		888	{
		889	ANHE he = heap [k];
		890
		891	for (;;)
		892	{
		893	int c = k << 1;
		894
		895	if (c > N + HEAP0 - 1)
		896	break;
		897
		898	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		899	? 1 : 0;
		900
		901	if (ANHE_at (he) <= ANHE_at (heap [c]))
		902	break;
		903
587	heap [k] = heap [j];	904	heap [k] = heap [c];
588	((W)heap [k])->active = k + 1;	905	ev_active (ANHE_w (heap [k])) = k;
		906
589	k = j;	907	k = c;
590	}	908	}
591		909
592	heap [k] = w;	910	heap [k] = he;
593	((W)heap [k])->active = k + 1;	911	ev_active (ANHE_w (he)) = k;
594	}	912	}
		913	#endif
595		914
596	inline void	915	/* towards the root */
		916	void inline_speed
		917	upheap (ANHE *heap, int k)
		918	{
		919	ANHE he = heap [k];
		920
		921	for (;;)
		922	{
		923	int p = HPARENT (k);
		924
		925	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		926	break;
		927
		928	heap [k] = heap [p];
		929	ev_active (ANHE_w (heap [k])) = k;
		930	k = p;
		931	}
		932
		933	heap [k] = he;
		934	ev_active (ANHE_w (he)) = k;
		935	}
		936
		937	void inline_size
597	adjustheap (WT *heap, int N, int k)	938	adjustheap (ANHE *heap, int N, int k)
598	{	939	{
		940	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
599	upheap (heap, k);	941	upheap (heap, k);
		942	else
600	downheap (heap, N, k);	943	downheap (heap, N, k);
		944	}
		945
		946	/* rebuild the heap: this function is used only once and executed rarely */
		947	void inline_size
		948	reheap (ANHE *heap, int N)
		949	{
		950	int i;
		951
		952	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		953	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		954	for (i = 0; i < N; ++i)
		955	upheap (heap, i + HEAP0);
601	}	956	}
602		957
603	/*****************************************************************************/	958	/*****************************************************************************/
604		959
605	typedef struct	960	typedef struct
606	{	961	{
607	WL head;	962	WL head;
608	sig_atomic_t volatile gotsig;	963	EV_ATOMIC_T gotsig;
609	} ANSIG;	964	} ANSIG;
610		965
611	static ANSIG *signals;	966	static ANSIG *signals;
612	static int signalmax;	967	static int signalmax;
613		968
614	static int sigpipe [2];	969	static EV_ATOMIC_T gotsig;
615	static sig_atomic_t volatile gotsig;
616	static struct ev_io sigev;
617		970
618	static void	971	void inline_size
619	signals_init (ANSIG *base, int count)	972	signals_init (ANSIG *base, int count)
620	{	973	{
621	while (count--)	974	while (count--)
622	{	975	{
623	base->head = 0;	976	base->head = 0;
…		…
625		978
626	++base;	979	++base;
627	}	980	}
628	}	981	}
629		982
630	static void	983	/*****************************************************************************/
631	sighandler (int signum)
632	{
633	#if _WIN32
634	signal (signum, sighandler);
635	#endif
636		984
637	signals [signum - 1].gotsig = 1;	985	void inline_speed
638
639	if (!gotsig)
640	{
641	int old_errno = errno;
642	gotsig = 1;
643	write (sigpipe [1], &signum, 1);
644	errno = old_errno;
645	}
646	}
647
648	void
649	ev_feed_signal_event (EV_P_ int signum)
650	{
651	WL w;
652
653	#if EV_MULTIPLICITY
654	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
655	#endif
656
657	--signum;
658
659	if (signum < 0 || signum >= signalmax)
660	return;
661
662	signals [signum].gotsig = 0;
663
664	for (w = signals [signum].head; w; w = w->next)
665	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
666	}
667
668	static void
669	sigcb (EV_P_ struct ev_io *iow, int revents)
670	{
671	int signum;
672
673	read (sigpipe [0], &revents, 1);
674	gotsig = 0;
675
676	for (signum = signalmax; signum--; )
677	if (signals [signum].gotsig)
678	ev_feed_signal_event (EV_A_ signum + 1);
679	}
680
681	static void
682	fd_intern (int fd)	986	fd_intern (int fd)
683	{	987	{
684	#ifdef _WIN32	988	#ifdef _WIN32
685	int arg = 1;	989	unsigned long arg = 1;
686	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	990	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
687	#else	991	#else
688	fcntl (fd, F_SETFD, FD_CLOEXEC);	992	fcntl (fd, F_SETFD, FD_CLOEXEC);
689	fcntl (fd, F_SETFL, O_NONBLOCK);	993	fcntl (fd, F_SETFL, O_NONBLOCK);
690	#endif	994	#endif
691	}	995	}
692		996
		997	static void noinline
		998	evpipe_init (EV_P)
		999	{
		1000	if (!ev_is_active (&pipeev))
		1001	{
		1002	#if EV_USE_EVENTFD
		1003	if ((evfd = eventfd (0, 0)) >= 0)
		1004	{
		1005	evpipe [0] = -1;
		1006	fd_intern (evfd);
		1007	ev_io_set (&pipeev, evfd, EV_READ);
		1008	}
		1009	else
		1010	#endif
		1011	{
		1012	while (pipe (evpipe))
		1013	syserr ("(libev) error creating signal/async pipe");
		1014
		1015	fd_intern (evpipe [0]);
		1016	fd_intern (evpipe [1]);
		1017	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1018	}
		1019
		1020	ev_io_start (EV_A_ &pipeev);
		1021	ev_unref (EV_A); /* watcher should not keep loop alive */
		1022	}
		1023	}
		1024
		1025	void inline_size
		1026	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1027	{
		1028	if (!*flag)
		1029	{
		1030	int old_errno = errno; /* save errno because write might clobber it */
		1031
		1032	*flag = 1;
		1033
		1034	#if EV_USE_EVENTFD
		1035	if (evfd >= 0)
		1036	{
		1037	uint64_t counter = 1;
		1038	write (evfd, &counter, sizeof (uint64_t));
		1039	}
		1040	else
		1041	#endif
		1042	write (evpipe [1], &old_errno, 1);
		1043
		1044	errno = old_errno;
		1045	}
		1046	}
		1047
693	static void	1048	static void
694	siginit (EV_P)	1049	pipecb (EV_P_ ev_io *iow, int revents)
695	{	1050	{
696	fd_intern (sigpipe [0]);	1051	#if EV_USE_EVENTFD
697	fd_intern (sigpipe [1]);	1052	if (evfd >= 0)
		1053	{
		1054	uint64_t counter;
		1055	read (evfd, &counter, sizeof (uint64_t));
		1056	}
		1057	else
		1058	#endif
		1059	{
		1060	char dummy;
		1061	read (evpipe [0], &dummy, 1);
		1062	}
698		1063
699	ev_io_set (&sigev, sigpipe [0], EV_READ);	1064	if (gotsig && ev_is_default_loop (EV_A))
700	ev_io_start (EV_A_ &sigev);	1065	{
701	ev_unref (EV_A); /* child watcher should not keep loop alive */	1066	int signum;
		1067	gotsig = 0;
		1068
		1069	for (signum = signalmax; signum--; )
		1070	if (signals [signum].gotsig)
		1071	ev_feed_signal_event (EV_A_ signum + 1);
		1072	}
		1073
		1074	#if EV_ASYNC_ENABLE
		1075	if (gotasync)
		1076	{
		1077	int i;
		1078	gotasync = 0;
		1079
		1080	for (i = asynccnt; i--; )
		1081	if (asyncs [i]->sent)
		1082	{
		1083	asyncs [i]->sent = 0;
		1084	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1085	}
		1086	}
		1087	#endif
702	}	1088	}
703		1089
704	/*****************************************************************************/	1090	/*****************************************************************************/
705		1091
706	static struct ev_child *childs [PID_HASHSIZE];	1092	static void
		1093	ev_sighandler (int signum)
		1094	{
		1095	#if EV_MULTIPLICITY
		1096	struct ev_loop *loop = &default_loop_struct;
		1097	#endif
		1098
		1099	#if _WIN32
		1100	signal (signum, ev_sighandler);
		1101	#endif
		1102
		1103	signals [signum - 1].gotsig = 1;
		1104	evpipe_write (EV_A_ &gotsig);
		1105	}
		1106
		1107	void noinline
		1108	ev_feed_signal_event (EV_P_ int signum)
		1109	{
		1110	WL w;
		1111
		1112	#if EV_MULTIPLICITY
		1113	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1114	#endif
		1115
		1116	--signum;
		1117
		1118	if (signum < 0 || signum >= signalmax)
		1119	return;
		1120
		1121	signals [signum].gotsig = 0;
		1122
		1123	for (w = signals [signum].head; w; w = w->next)
		1124	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1125	}
		1126
		1127	/*****************************************************************************/
		1128
		1129	static WL childs [EV_PID_HASHSIZE];
707		1130
708	#ifndef _WIN32	1131	#ifndef _WIN32
709		1132
710	static struct ev_signal childev;	1133	static ev_signal childev;
		1134
		1135	#ifndef WIFCONTINUED
		1136	# define WIFCONTINUED(status) 0
		1137	#endif
		1138
		1139	void inline_speed
		1140	child_reap (EV_P_ int chain, int pid, int status)
		1141	{
		1142	ev_child *w;
		1143	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1144
		1145	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1146	{
		1147	if ((w->pid == pid || !w->pid)
		1148	&& (!traced || (w->flags & 1)))
		1149	{
		1150	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1151	w->rpid = pid;
		1152	w->rstatus = status;
		1153	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1154	}
		1155	}
		1156	}
711		1157
712	#ifndef WCONTINUED	1158	#ifndef WCONTINUED
713	# define WCONTINUED 0	1159	# define WCONTINUED 0
714	#endif	1160	#endif
715		1161
716	static void	1162	static void
717	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
718	{
719	struct ev_child *w;
720
721	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
722	if (w->pid == pid || !w->pid)
723	{
724	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
725	w->rpid = pid;
726	w->rstatus = status;
727	ev_feed_event (EV_A_ (W)w, EV_CHILD);
728	}
729	}
730
731	static void
732	childcb (EV_P_ struct ev_signal *sw, int revents)	1163	childcb (EV_P_ ev_signal *sw, int revents)
733	{	1164	{
734	int pid, status;	1165	int pid, status;
735		1166
		1167	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
736	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1168	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
737	{	1169	if (!WCONTINUED
		1170	|| errno != EINVAL
		1171	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1172	return;
		1173
738	/* make sure we are called again until all childs have been reaped */	1174	/* make sure we are called again until all children have been reaped */
739	/* we need to do it this way so that the callback gets called before we continue */	1175	/* we need to do it this way so that the callback gets called before we continue */
740	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1176	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
741		1177
742	child_reap (EV_A_ sw, pid, pid, status);	1178	child_reap (EV_A_ pid, pid, status);
		1179	if (EV_PID_HASHSIZE > 1)
743	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1180	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
744	}
745	}	1181	}
746		1182
747	#endif	1183	#endif
748		1184
749	/*****************************************************************************/	1185	/*****************************************************************************/
…		…
775	{	1211	{
776	return EV_VERSION_MINOR;	1212	return EV_VERSION_MINOR;
777	}	1213	}
778		1214
779	/* return true if we are running with elevated privileges and should ignore env variables */	1215	/* return true if we are running with elevated privileges and should ignore env variables */
780	static int	1216	int inline_size
781	enable_secure (void)	1217	enable_secure (void)
782	{	1218	{
783	#ifdef _WIN32	1219	#ifdef _WIN32
784	return 0;	1220	return 0;
785	#else	1221	#else
…		…
821	}	1257	}
822		1258
823	unsigned int	1259	unsigned int
824	ev_embeddable_backends (void)	1260	ev_embeddable_backends (void)
825	{	1261	{
826	return EVBACKEND_EPOLL	1262	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
827	| EVBACKEND_KQUEUE	1263
828	| EVBACKEND_PORT;	1264	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1265	/* please fix it and tell me how to detect the fix */
		1266	flags &= ~EVBACKEND_EPOLL;
		1267
		1268	return flags;
829	}	1269	}
830		1270
831	unsigned int	1271	unsigned int
832	ev_backend (EV_P)	1272	ev_backend (EV_P)
833	{	1273	{
834	return backend;	1274	return backend;
835	}	1275	}
836		1276
837	static void	1277	unsigned int
		1278	ev_loop_count (EV_P)
		1279	{
		1280	return loop_count;
		1281	}
		1282
		1283	void
		1284	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1285	{
		1286	io_blocktime = interval;
		1287	}
		1288
		1289	void
		1290	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1291	{
		1292	timeout_blocktime = interval;
		1293	}
		1294
		1295	static void noinline
838	loop_init (EV_P_ unsigned int flags)	1296	loop_init (EV_P_ unsigned int flags)
839	{	1297	{
840	if (!backend)	1298	if (!backend)
841	{	1299	{
842	#if EV_USE_MONOTONIC	1300	#if EV_USE_MONOTONIC
…		…
845	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
846	have_monotonic = 1;	1304	have_monotonic = 1;
847	}	1305	}
848	#endif	1306	#endif
849		1307
850	ev_rt_now = ev_time ();	1308	ev_rt_now = ev_time ();
851	mn_now = get_clock ();	1309	mn_now = get_clock ();
852	now_floor = mn_now;	1310	now_floor = mn_now;
853	rtmn_diff = ev_rt_now - mn_now;	1311	rtmn_diff = ev_rt_now - mn_now;
		1312
		1313	io_blocktime = 0.;
		1314	timeout_blocktime = 0.;
		1315	backend = 0;
		1316	backend_fd = -1;
		1317	gotasync = 0;
		1318	#if EV_USE_INOTIFY
		1319	fs_fd = -2;
		1320	#endif
		1321
		1322	/* pid check not overridable via env */
		1323	#ifndef _WIN32
		1324	if (flags & EVFLAG_FORKCHECK)
		1325	curpid = getpid ();
		1326	#endif
854		1327
855	if (!(flags & EVFLAG_NOENV)	1328	if (!(flags & EVFLAG_NOENV)
856	&& !enable_secure ()	1329	&& !enable_secure ()
857	&& getenv ("LIBEV_FLAGS"))	1330	&& getenv ("LIBEV_FLAGS"))
858	flags = atoi (getenv ("LIBEV_FLAGS"));	1331	flags = atoi (getenv ("LIBEV_FLAGS"));
859		1332
860	if (!(flags & 0x0000ffffUL))	1333	if (!(flags & 0x0000ffffU))
861	flags |= ev_recommended_backends ();	1334	flags |= ev_recommended_backends ();
862		1335
863	backend = 0;
864	#if EV_USE_PORT	1336	#if EV_USE_PORT
865	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1337	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
866	#endif	1338	#endif
867	#if EV_USE_KQUEUE	1339	#if EV_USE_KQUEUE
868	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1340	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
875	#endif	1347	#endif
876	#if EV_USE_SELECT	1348	#if EV_USE_SELECT
877	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1349	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
878	#endif	1350	#endif
879		1351
880	ev_init (&sigev, sigcb);	1352	ev_init (&pipeev, pipecb);
881	ev_set_priority (&sigev, EV_MAXPRI);	1353	ev_set_priority (&pipeev, EV_MAXPRI);
882	}	1354	}
883	}	1355	}
884		1356
885	static void	1357	static void noinline
886	loop_destroy (EV_P)	1358	loop_destroy (EV_P)
887	{	1359	{
888	int i;	1360	int i;
		1361
		1362	if (ev_is_active (&pipeev))
		1363	{
		1364	ev_ref (EV_A); /* signal watcher */
		1365	ev_io_stop (EV_A_ &pipeev);
		1366
		1367	#if EV_USE_EVENTFD
		1368	if (evfd >= 0)
		1369	close (evfd);
		1370	#endif
		1371
		1372	if (evpipe [0] >= 0)
		1373	{
		1374	close (evpipe [0]);
		1375	close (evpipe [1]);
		1376	}
		1377	}
		1378
		1379	#if EV_USE_INOTIFY
		1380	if (fs_fd >= 0)
		1381	close (fs_fd);
		1382	#endif
		1383
		1384	if (backend_fd >= 0)
		1385	close (backend_fd);
889		1386
890	#if EV_USE_PORT	1387	#if EV_USE_PORT
891	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1388	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
892	#endif	1389	#endif
893	#if EV_USE_KQUEUE	1390	#if EV_USE_KQUEUE
…		…
902	#if EV_USE_SELECT	1399	#if EV_USE_SELECT
903	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);	1400	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
904	#endif	1401	#endif
905		1402
906	for (i = NUMPRI; i--; )	1403	for (i = NUMPRI; i--; )
		1404	{
907	array_free (pending, [i]);	1405	array_free (pending, [i]);
		1406	#if EV_IDLE_ENABLE
		1407	array_free (idle, [i]);
		1408	#endif
		1409	}
		1410
		1411	ev_free (anfds); anfdmax = 0;
908		1412
909	/* have to use the microsoft-never-gets-it-right macro */	1413	/* have to use the microsoft-never-gets-it-right macro */
910	array_free (fdchange, EMPTY0);	1414	array_free (fdchange, EMPTY);
911	array_free (timer, EMPTY0);	1415	array_free (timer, EMPTY);
912	#if EV_PERIODICS	1416	#if EV_PERIODIC_ENABLE
913	array_free (periodic, EMPTY0);	1417	array_free (periodic, EMPTY);
914	#endif	1418	#endif
		1419	#if EV_FORK_ENABLE
915	array_free (idle, EMPTY0);	1420	array_free (fork, EMPTY);
		1421	#endif
916	array_free (prepare, EMPTY0);	1422	array_free (prepare, EMPTY);
917	array_free (check, EMPTY0);	1423	array_free (check, EMPTY);
		1424	#if EV_ASYNC_ENABLE
		1425	array_free (async, EMPTY);
		1426	#endif
918		1427
919	backend = 0;	1428	backend = 0;
920	}	1429	}
921		1430
922	static void	1431	#if EV_USE_INOTIFY
		1432	void inline_size infy_fork (EV_P);
		1433	#endif
		1434
		1435	void inline_size
923	loop_fork (EV_P)	1436	loop_fork (EV_P)
924	{	1437	{
925	#if EV_USE_PORT	1438	#if EV_USE_PORT
926	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1439	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
927	#endif	1440	#endif
…		…
929	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);	1442	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
930	#endif	1443	#endif
931	#if EV_USE_EPOLL	1444	#if EV_USE_EPOLL
932	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);	1445	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
933	#endif	1446	#endif
		1447	#if EV_USE_INOTIFY
		1448	infy_fork (EV_A);
		1449	#endif
934		1450
935	if (ev_is_active (&sigev))	1451	if (ev_is_active (&pipeev))
936	{	1452	{
937	/* default loop */	1453	/* this "locks" the handlers against writing to the pipe */
		1454	/* while we modify the fd vars */
		1455	gotsig = 1;
		1456	#if EV_ASYNC_ENABLE
		1457	gotasync = 1;
		1458	#endif
938		1459
939	ev_ref (EV_A);	1460	ev_ref (EV_A);
940	ev_io_stop (EV_A_ &sigev);	1461	ev_io_stop (EV_A_ &pipeev);
		1462
		1463	#if EV_USE_EVENTFD
		1464	if (evfd >= 0)
		1465	close (evfd);
		1466	#endif
		1467
		1468	if (evpipe [0] >= 0)
		1469	{
941	close (sigpipe [0]);	1470	close (evpipe [0]);
942	close (sigpipe [1]);	1471	close (evpipe [1]);
		1472	}
943		1473
944	while (pipe (sigpipe))
945	syserr ("(libev) error creating pipe");
946
947	siginit (EV_A);	1474	evpipe_init (EV_A);
		1475	/* now iterate over everything, in case we missed something */
		1476	pipecb (EV_A_ &pipeev, EV_READ);
948	}	1477	}
949		1478
950	postfork = 0;	1479	postfork = 0;
951	}	1480	}
952		1481
953	#if EV_MULTIPLICITY	1482	#if EV_MULTIPLICITY
		1483
954	struct ev_loop *	1484	struct ev_loop *
955	ev_loop_new (unsigned int flags)	1485	ev_loop_new (unsigned int flags)
956	{	1486	{
957	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1487	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
958		1488
…		…
974	}	1504	}
975		1505
976	void	1506	void
977	ev_loop_fork (EV_P)	1507	ev_loop_fork (EV_P)
978	{	1508	{
979	postfork = 1;	1509	postfork = 1; /* must be in line with ev_default_fork */
980	}	1510	}
981		1511
		1512	#if EV_VERIFY
		1513	void noinline
		1514	verify_watcher (EV_P_ W w)
		1515	{
		1516	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1517
		1518	if (w->pending)
		1519	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1520	}
		1521
		1522	static void noinline
		1523	verify_heap (EV_P_ ANHE *heap, int N)
		1524	{
		1525	int i;
		1526
		1527	for (i = HEAP0; i < N + HEAP0; ++i)
		1528	{
		1529	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1530	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1531	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1532
		1533	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1534	}
		1535	}
		1536
		1537	static void noinline
		1538	array_verify (EV_P_ W *ws, int cnt)
		1539	{
		1540	while (cnt--)
		1541	{
		1542	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1543	verify_watcher (EV_A_ ws [cnt]);
		1544	}
		1545	}
		1546	#endif
		1547
		1548	void
		1549	ev_loop_verify (EV_P)
		1550	{
		1551	#if EV_VERIFY
		1552	int i;
		1553	WL w;
		1554
		1555	assert (activecnt >= -1);
		1556
		1557	assert (fdchangemax >= fdchangecnt);
		1558	for (i = 0; i < fdchangecnt; ++i)
		1559	assert (("negative fd in fdchanges", fdchanges [i] >= 0));
		1560
		1561	assert (anfdmax >= 0);
		1562	for (i = 0; i < anfdmax; ++i)
		1563	for (w = anfds [i].head; w; w = w->next)
		1564	{
		1565	verify_watcher (EV_A_ (W)w);
		1566	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
		1567	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1568	}
		1569
		1570	assert (timermax >= timercnt);
		1571	verify_heap (EV_A_ timers, timercnt);
		1572
		1573	#if EV_PERIODIC_ENABLE
		1574	assert (periodicmax >= periodiccnt);
		1575	verify_heap (EV_A_ periodics, periodiccnt);
		1576	#endif
		1577
		1578	for (i = NUMPRI; i--; )
		1579	{
		1580	assert (pendingmax [i] >= pendingcnt [i]);
		1581	#if EV_IDLE_ENABLE
		1582	assert (idleall >= 0);
		1583	assert (idlemax [i] >= idlecnt [i]);
		1584	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1585	#endif
		1586	}
		1587
		1588	#if EV_FORK_ENABLE
		1589	assert (forkmax >= forkcnt);
		1590	array_verify (EV_A_ (W *)forks, forkcnt);
		1591	#endif
		1592
		1593	#if EV_ASYNC_ENABLE
		1594	assert (asyncmax >= asynccnt);
		1595	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1596	#endif
		1597
		1598	assert (preparemax >= preparecnt);
		1599	array_verify (EV_A_ (W *)prepares, preparecnt);
		1600
		1601	assert (checkmax >= checkcnt);
		1602	array_verify (EV_A_ (W *)checks, checkcnt);
		1603
		1604	# if 0
		1605	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1606	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
982	#endif	1607	# endif
		1608	#endif
		1609	}
		1610
		1611	#endif /* multiplicity */
983		1612
984	#if EV_MULTIPLICITY	1613	#if EV_MULTIPLICITY
985	struct ev_loop *	1614	struct ev_loop *
986	ev_default_loop_init (unsigned int flags)	1615	ev_default_loop_init (unsigned int flags)
987	#else	1616	#else
988	int	1617	int
989	ev_default_loop (unsigned int flags)	1618	ev_default_loop (unsigned int flags)
990	#endif	1619	#endif
991	{	1620	{
992	if (sigpipe [0] == sigpipe [1])
993	if (pipe (sigpipe))
994	return 0;
995
996	if (!ev_default_loop_ptr)	1621	if (!ev_default_loop_ptr)
997	{	1622	{
998	#if EV_MULTIPLICITY	1623	#if EV_MULTIPLICITY
999	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1624	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1000	#else	1625	#else
…		…
1003		1628
1004	loop_init (EV_A_ flags);	1629	loop_init (EV_A_ flags);
1005		1630
1006	if (ev_backend (EV_A))	1631	if (ev_backend (EV_A))
1007	{	1632	{
1008	siginit (EV_A);
1009
1010	#ifndef _WIN32	1633	#ifndef _WIN32
1011	ev_signal_init (&childev, childcb, SIGCHLD);	1634	ev_signal_init (&childev, childcb, SIGCHLD);
1012	ev_set_priority (&childev, EV_MAXPRI);	1635	ev_set_priority (&childev, EV_MAXPRI);
1013	ev_signal_start (EV_A_ &childev);	1636	ev_signal_start (EV_A_ &childev);
1014	ev_unref (EV_A); /* child watcher should not keep loop alive */	1637	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1031	#ifndef _WIN32	1654	#ifndef _WIN32
1032	ev_ref (EV_A); /* child watcher */	1655	ev_ref (EV_A); /* child watcher */
1033	ev_signal_stop (EV_A_ &childev);	1656	ev_signal_stop (EV_A_ &childev);
1034	#endif	1657	#endif
1035		1658
1036	ev_ref (EV_A); /* signal watcher */
1037	ev_io_stop (EV_A_ &sigev);
1038
1039	close (sigpipe [0]); sigpipe [0] = 0;
1040	close (sigpipe [1]); sigpipe [1] = 0;
1041
1042	loop_destroy (EV_A);	1659	loop_destroy (EV_A);
1043	}	1660	}
1044		1661
1045	void	1662	void
1046	ev_default_fork (void)	1663	ev_default_fork (void)
…		…
1048	#if EV_MULTIPLICITY	1665	#if EV_MULTIPLICITY
1049	struct ev_loop *loop = ev_default_loop_ptr;	1666	struct ev_loop *loop = ev_default_loop_ptr;
1050	#endif	1667	#endif
1051		1668
1052	if (backend)	1669	if (backend)
1053	postfork = 1;	1670	postfork = 1; /* must be in line with ev_loop_fork */
1054	}	1671	}
1055		1672
1056	/*****************************************************************************/	1673	/*****************************************************************************/
1057		1674
1058	static int	1675	void
1059	any_pending (EV_P)	1676	ev_invoke (EV_P_ void *w, int revents)
1060	{	1677	{
1061	int pri;	1678	EV_CB_INVOKE ((W)w, revents);
1062
1063	for (pri = NUMPRI; pri--; )
1064	if (pendingcnt [pri])
1065	return 1;
1066
1067	return 0;
1068	}	1679	}
1069		1680
1070	inline void	1681	void inline_speed
1071	call_pending (EV_P)	1682	call_pending (EV_P)
1072	{	1683	{
1073	int pri;	1684	int pri;
1074		1685
1075	for (pri = NUMPRI; pri--; )	1686	for (pri = NUMPRI; pri--; )
…		…
1077	{	1688	{
1078	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1689	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1079		1690
1080	if (expect_true (p->w))	1691	if (expect_true (p->w))
1081	{	1692	{
		1693	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1694
1082	p->w->pending = 0;	1695	p->w->pending = 0;
1083	EV_CB_INVOKE (p->w, p->events);	1696	EV_CB_INVOKE (p->w, p->events);
		1697	EV_FREQUENT_CHECK;
1084	}	1698	}
1085	}	1699	}
1086	}	1700	}
1087		1701
1088	inline void	1702	#if EV_IDLE_ENABLE
		1703	void inline_size
		1704	idle_reify (EV_P)
		1705	{
		1706	if (expect_false (idleall))
		1707	{
		1708	int pri;
		1709
		1710	for (pri = NUMPRI; pri--; )
		1711	{
		1712	if (pendingcnt [pri])
		1713	break;
		1714
		1715	if (idlecnt [pri])
		1716	{
		1717	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1718	break;
		1719	}
		1720	}
		1721	}
		1722	}
		1723	#endif
		1724
		1725	void inline_size
1089	timers_reify (EV_P)	1726	timers_reify (EV_P)
1090	{	1727	{
		1728	EV_FREQUENT_CHECK;
		1729
1091	while (timercnt && ((WT)timers [0])->at <= mn_now)	1730	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1092	{	1731	{
1093	struct ev_timer *w = timers [0];	1732	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1094		1733
1095	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1734	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1096		1735
1097	/* first reschedule or stop timer */	1736	/* first reschedule or stop timer */
1098	if (w->repeat)	1737	if (w->repeat)
1099	{	1738	{
		1739	ev_at (w) += w->repeat;
		1740	if (ev_at (w) < mn_now)
		1741	ev_at (w) = mn_now;
		1742
1100	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1743	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1101		1744
1102	((WT)w)->at += w->repeat;	1745	ANHE_at_cache (timers [HEAP0]);
1103	if (((WT)w)->at < mn_now)
1104	((WT)w)->at = mn_now;
1105
1106	downheap ((WT *)timers, timercnt, 0);	1746	downheap (timers, timercnt, HEAP0);
1107	}	1747	}
1108	else	1748	else
1109	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1749	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1110		1750
		1751	EV_FREQUENT_CHECK;
1111	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1752	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1112	}	1753	}
1113	}	1754	}
1114		1755
1115	#if EV_PERIODICS	1756	#if EV_PERIODIC_ENABLE
1116	inline void	1757	void inline_size
1117	periodics_reify (EV_P)	1758	periodics_reify (EV_P)
1118	{	1759	{
		1760	EV_FREQUENT_CHECK;
		1761
1119	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1762	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1120	{	1763	{
1121	struct ev_periodic *w = periodics [0];	1764	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1122		1765
1123	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1766	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1124		1767
1125	/* first reschedule or stop timer */	1768	/* first reschedule or stop timer */
1126	if (w->reschedule_cb)	1769	if (w->reschedule_cb)
1127	{	1770	{
1128	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1771	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1772
1129	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1773	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1774
		1775	ANHE_at_cache (periodics [HEAP0]);
1130	downheap ((WT *)periodics, periodiccnt, 0);	1776	downheap (periodics, periodiccnt, HEAP0);
1131	}	1777	}
1132	else if (w->interval)	1778	else if (w->interval)
1133	{	1779	{
1134	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1780	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1135	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1781	/* if next trigger time is not sufficiently in the future, put it there */
		1782	/* this might happen because of floating point inexactness */
		1783	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1784	{
		1785	ev_at (w) += w->interval;
		1786
		1787	/* if interval is unreasonably low we might still have a time in the past */
		1788	/* so correct this. this will make the periodic very inexact, but the user */
		1789	/* has effectively asked to get triggered more often than possible */
		1790	if (ev_at (w) < ev_rt_now)
		1791	ev_at (w) = ev_rt_now;
		1792	}
		1793
		1794	ANHE_at_cache (periodics [HEAP0]);
1136	downheap ((WT *)periodics, periodiccnt, 0);	1795	downheap (periodics, periodiccnt, HEAP0);
1137	}	1796	}
1138	else	1797	else
1139	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1798	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1140		1799
		1800	EV_FREQUENT_CHECK;
1141	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1801	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1142	}	1802	}
1143	}	1803	}
1144		1804
1145	static void	1805	static void noinline
1146	periodics_reschedule (EV_P)	1806	periodics_reschedule (EV_P)
1147	{	1807	{
1148	int i;	1808	int i;
1149		1809
1150	/* adjust periodics after time jump */	1810	/* adjust periodics after time jump */
1151	for (i = 0; i < periodiccnt; ++i)	1811	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1152	{	1812	{
1153	struct ev_periodic *w = periodics [i];	1813	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1154		1814
1155	if (w->reschedule_cb)	1815	if (w->reschedule_cb)
1156	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1816	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1157	else if (w->interval)	1817	else if (w->interval)
1158	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1818	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1819
		1820	ANHE_at_cache (periodics [i]);
		1821	}
		1822
		1823	reheap (periodics, periodiccnt);
		1824	}
		1825	#endif
		1826
		1827	void inline_speed
		1828	time_update (EV_P_ ev_tstamp max_block)
		1829	{
		1830	int i;
		1831
		1832	#if EV_USE_MONOTONIC
		1833	if (expect_true (have_monotonic))
1159	}	1834	{
		1835	ev_tstamp odiff = rtmn_diff;
1160		1836
1161	/* now rebuild the heap */
1162	for (i = periodiccnt >> 1; i--; )
1163	downheap ((WT *)periodics, periodiccnt, i);
1164	}
1165	#endif
1166
1167	inline int
1168	time_update_monotonic (EV_P)
1169	{
1170	mn_now = get_clock ();	1837	mn_now = get_clock ();
1171		1838
		1839	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1840	/* interpolate in the meantime */
1172	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1841	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1173	{	1842	{
1174	ev_rt_now = rtmn_diff + mn_now;	1843	ev_rt_now = rtmn_diff + mn_now;
1175	return 0;	1844	return;
1176	}	1845	}
1177	else	1846
1178	{
1179	now_floor = mn_now;	1847	now_floor = mn_now;
1180	ev_rt_now = ev_time ();	1848	ev_rt_now = ev_time ();
1181	return 1;
1182	}
1183	}
1184		1849
1185	inline void	1850	/* loop a few times, before making important decisions.
1186	time_update (EV_P)	1851	* on the choice of "4": one iteration isn't enough,
1187	{	1852	* in case we get preempted during the calls to
1188	int i;	1853	* ev_time and get_clock. a second call is almost guaranteed
1189		1854	* to succeed in that case, though. and looping a few more times
1190	#if EV_USE_MONOTONIC	1855	* doesn't hurt either as we only do this on time-jumps or
1191	if (expect_true (have_monotonic))	1856	* in the unlikely event of having been preempted here.
1192	{	1857	*/
1193	if (time_update_monotonic (EV_A))	1858	for (i = 4; --i; )
1194	{	1859	{
1195	ev_tstamp odiff = rtmn_diff;	1860	rtmn_diff = ev_rt_now - mn_now;
1196		1861
1197	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1862	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1863	return; /* all is well */
		1864
		1865	ev_rt_now = ev_time ();
		1866	mn_now = get_clock ();
		1867	now_floor = mn_now;
		1868	}
		1869
		1870	# if EV_PERIODIC_ENABLE
		1871	periodics_reschedule (EV_A);
		1872	# endif
		1873	/* no timer adjustment, as the monotonic clock doesn't jump */
		1874	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1875	}
		1876	else
		1877	#endif
		1878	{
		1879	ev_rt_now = ev_time ();
		1880
		1881	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1882	{
		1883	#if EV_PERIODIC_ENABLE
		1884	periodics_reschedule (EV_A);
		1885	#endif
		1886	/* adjust timers. this is easy, as the offset is the same for all of them */
		1887	for (i = 0; i < timercnt; ++i)
1198	{	1888	{
1199	rtmn_diff = ev_rt_now - mn_now;	1889	ANHE *he = timers + i + HEAP0;
1200		1890	ANHE_w (*he)->at += ev_rt_now - mn_now;
1201	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1891	ANHE_at_cache (*he);
1202	return; /* all is well */
1203
1204	ev_rt_now = ev_time ();
1205	mn_now = get_clock ();
1206	now_floor = mn_now;
1207	}	1892	}
1208
1209	# if EV_PERIODICS
1210	periodics_reschedule (EV_A);
1211	# endif
1212	/* no timer adjustment, as the monotonic clock doesn't jump */
1213	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1214	}	1893	}
1215	}
1216	else
1217	#endif
1218	{
1219	ev_rt_now = ev_time ();
1220
1221	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1222	{
1223	#if EV_PERIODICS
1224	periodics_reschedule (EV_A);
1225	#endif
1226
1227	/* adjust timers. this is easy, as the offset is the same for all */
1228	for (i = 0; i < timercnt; ++i)
1229	((WT)timers [i])->at += ev_rt_now - mn_now;
1230	}
1231		1894
1232	mn_now = ev_rt_now;	1895	mn_now = ev_rt_now;
1233	}	1896	}
1234	}	1897	}
1235		1898
…		…
1248	static int loop_done;	1911	static int loop_done;
1249		1912
1250	void	1913	void
1251	ev_loop (EV_P_ int flags)	1914	ev_loop (EV_P_ int flags)
1252	{	1915	{
1253	double block;	1916	loop_done = EVUNLOOP_CANCEL;
1254	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1255		1917
1256	while (activecnt)	1918	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1919
		1920	do
1257	{	1921	{
		1922	#if EV_VERIFY >= 2
		1923	ev_loop_verify (EV_A);
		1924	#endif
		1925
		1926	#ifndef _WIN32
		1927	if (expect_false (curpid)) /* penalise the forking check even more */
		1928	if (expect_false (getpid () != curpid))
		1929	{
		1930	curpid = getpid ();
		1931	postfork = 1;
		1932	}
		1933	#endif
		1934
		1935	#if EV_FORK_ENABLE
		1936	/* we might have forked, so queue fork handlers */
		1937	if (expect_false (postfork))
		1938	if (forkcnt)
		1939	{
		1940	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1941	call_pending (EV_A);
		1942	}
		1943	#endif
		1944
1258	/* queue check watchers (and execute them) */	1945	/* queue prepare watchers (and execute them) */
1259	if (expect_false (preparecnt))	1946	if (expect_false (preparecnt))
1260	{	1947	{
1261	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1948	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1262	call_pending (EV_A);	1949	call_pending (EV_A);
1263	}	1950	}
1264		1951
		1952	if (expect_false (!activecnt))
		1953	break;
		1954
1265	/* we might have forked, so reify kernel state if necessary */	1955	/* we might have forked, so reify kernel state if necessary */
1266	if (expect_false (postfork))	1956	if (expect_false (postfork))
1267	loop_fork (EV_A);	1957	loop_fork (EV_A);
1268		1958
1269	/* update fd-related kernel structures */	1959	/* update fd-related kernel structures */
1270	fd_reify (EV_A);	1960	fd_reify (EV_A);
1271		1961
1272	/* calculate blocking time */	1962	/* calculate blocking time */
		1963	{
		1964	ev_tstamp waittime = 0.;
		1965	ev_tstamp sleeptime = 0.;
1273		1966
1274	/* we only need this for !monotonic clock or timers, but as we basically	1967	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1275	always have timers, we just calculate it always */
1276	#if EV_USE_MONOTONIC
1277	if (expect_true (have_monotonic))
1278	time_update_monotonic (EV_A);
1279	else
1280	#endif
1281	{	1968	{
1282	ev_rt_now = ev_time ();	1969	/* update time to cancel out callback processing overhead */
1283	mn_now = ev_rt_now;	1970	time_update (EV_A_ 1e100);
1284	}
1285		1971
1286	if (flags & EVLOOP_NONBLOCK || idlecnt)
1287	block = 0.;
1288	else
1289	{
1290	block = MAX_BLOCKTIME;	1972	waittime = MAX_BLOCKTIME;
1291		1973
1292	if (timercnt)	1974	if (timercnt)
1293	{	1975	{
1294	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1976	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1295	if (block > to) block = to;	1977	if (waittime > to) waittime = to;
1296	}	1978	}
1297		1979
1298	#if EV_PERIODICS	1980	#if EV_PERIODIC_ENABLE
1299	if (periodiccnt)	1981	if (periodiccnt)
1300	{	1982	{
1301	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1983	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1302	if (block > to) block = to;	1984	if (waittime > to) waittime = to;
1303	}	1985	}
1304	#endif	1986	#endif
1305		1987
1306	if (expect_false (block < 0.)) block = 0.;	1988	if (expect_false (waittime < timeout_blocktime))
		1989	waittime = timeout_blocktime;
		1990
		1991	sleeptime = waittime - backend_fudge;
		1992
		1993	if (expect_true (sleeptime > io_blocktime))
		1994	sleeptime = io_blocktime;
		1995
		1996	if (sleeptime)
		1997	{
		1998	ev_sleep (sleeptime);
		1999	waittime -= sleeptime;
		2000	}
1307	}	2001	}
1308		2002
		2003	++loop_count;
1309	backend_poll (EV_A_ block);	2004	backend_poll (EV_A_ waittime);
1310		2005
1311	/* update ev_rt_now, do magic */	2006	/* update ev_rt_now, do magic */
1312	time_update (EV_A);	2007	time_update (EV_A_ waittime + sleeptime);
		2008	}
1313		2009
1314	/* queue pending timers and reschedule them */	2010	/* queue pending timers and reschedule them */
1315	timers_reify (EV_A); /* relative timers called last */	2011	timers_reify (EV_A); /* relative timers called last */
1316	#if EV_PERIODICS	2012	#if EV_PERIODIC_ENABLE
1317	periodics_reify (EV_A); /* absolute timers called first */	2013	periodics_reify (EV_A); /* absolute timers called first */
1318	#endif	2014	#endif
1319		2015
		2016	#if EV_IDLE_ENABLE
1320	/* queue idle watchers unless io or timers are pending */	2017	/* queue idle watchers unless other events are pending */
1321	if (idlecnt && !any_pending (EV_A))	2018	idle_reify (EV_A);
1322	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2019	#endif
1323		2020
1324	/* queue check watchers, to be executed first */	2021	/* queue check watchers, to be executed first */
1325	if (expect_false (checkcnt))	2022	if (expect_false (checkcnt))
1326	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2023	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1327		2024
1328	call_pending (EV_A);	2025	call_pending (EV_A);
1329
1330	if (expect_false (loop_done))
1331	break;
1332	}	2026	}
		2027	while (expect_true (
		2028	activecnt
		2029	&& !loop_done
		2030	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		2031	));
1333		2032
1334	if (loop_done != 2)	2033	if (loop_done == EVUNLOOP_ONE)
1335	loop_done = 0;	2034	loop_done = EVUNLOOP_CANCEL;
1336	}	2035	}
1337		2036
1338	void	2037	void
1339	ev_unloop (EV_P_ int how)	2038	ev_unloop (EV_P_ int how)
1340	{	2039	{
1341	loop_done = how;	2040	loop_done = how;
1342	}	2041	}
1343		2042
1344	/*****************************************************************************/	2043	/*****************************************************************************/
1345		2044
1346	inline void	2045	void inline_size
1347	wlist_add (WL *head, WL elem)	2046	wlist_add (WL *head, WL elem)
1348	{	2047	{
1349	elem->next = *head;	2048	elem->next = *head;
1350	*head = elem;	2049	*head = elem;
1351	}	2050	}
1352		2051
1353	inline void	2052	void inline_size
1354	wlist_del (WL *head, WL elem)	2053	wlist_del (WL *head, WL elem)
1355	{	2054	{
1356	while (*head)	2055	while (*head)
1357	{	2056	{
1358	if (*head == elem)	2057	if (*head == elem)
…		…
1363		2062
1364	head = &(*head)->next;	2063	head = &(*head)->next;
1365	}	2064	}
1366	}	2065	}
1367		2066
1368	inline void	2067	void inline_speed
1369	ev_clear_pending (EV_P_ W w)	2068	clear_pending (EV_P_ W w)
1370	{	2069	{
1371	if (w->pending)	2070	if (w->pending)
1372	{	2071	{
1373	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2072	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1374	w->pending = 0;	2073	w->pending = 0;
1375	}	2074	}
1376	}	2075	}
1377		2076
1378	inline void	2077	int
		2078	ev_clear_pending (EV_P_ void *w)
		2079	{
		2080	W w_ = (W)w;
		2081	int pending = w_->pending;
		2082
		2083	if (expect_true (pending))
		2084	{
		2085	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2086	w_->pending = 0;
		2087	p->w = 0;
		2088	return p->events;
		2089	}
		2090	else
		2091	return 0;
		2092	}
		2093
		2094	void inline_size
		2095	pri_adjust (EV_P_ W w)
		2096	{
		2097	int pri = w->priority;
		2098	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2099	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2100	w->priority = pri;
		2101	}
		2102
		2103	void inline_speed
1379	ev_start (EV_P_ W w, int active)	2104	ev_start (EV_P_ W w, int active)
1380	{	2105	{
1381	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2106	pri_adjust (EV_A_ w);
1382	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1383
1384	w->active = active;	2107	w->active = active;
1385	ev_ref (EV_A);	2108	ev_ref (EV_A);
1386	}	2109	}
1387		2110
1388	inline void	2111	void inline_size
1389	ev_stop (EV_P_ W w)	2112	ev_stop (EV_P_ W w)
1390	{	2113	{
1391	ev_unref (EV_A);	2114	ev_unref (EV_A);
1392	w->active = 0;	2115	w->active = 0;
1393	}	2116	}
1394		2117
1395	/*****************************************************************************/	2118	/*****************************************************************************/
1396		2119
1397	void	2120	void noinline
1398	ev_io_start (EV_P_ struct ev_io *w)	2121	ev_io_start (EV_P_ ev_io *w)
1399	{	2122	{
1400	int fd = w->fd;	2123	int fd = w->fd;
1401		2124
1402	if (expect_false (ev_is_active (w)))	2125	if (expect_false (ev_is_active (w)))
1403	return;	2126	return;
1404		2127
1405	assert (("ev_io_start called with negative fd", fd >= 0));	2128	assert (("ev_io_start called with negative fd", fd >= 0));
1406		2129
		2130	EV_FREQUENT_CHECK;
		2131
1407	ev_start (EV_A_ (W)w, 1);	2132	ev_start (EV_A_ (W)w, 1);
1408	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2133	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1409	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2134	wlist_add (&anfds[fd].head, (WL)w);
1410		2135
1411	fd_change (EV_A_ fd);	2136	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1412	}	2137	w->events &= ~EV_IOFDSET;
1413		2138
1414	void	2139	EV_FREQUENT_CHECK;
		2140	}
		2141
		2142	void noinline
1415	ev_io_stop (EV_P_ struct ev_io *w)	2143	ev_io_stop (EV_P_ ev_io *w)
1416	{	2144	{
1417	ev_clear_pending (EV_A_ (W)w);	2145	clear_pending (EV_A_ (W)w);
1418	if (expect_false (!ev_is_active (w)))	2146	if (expect_false (!ev_is_active (w)))
1419	return;	2147	return;
1420		2148
1421	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2149	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1422		2150
		2151	EV_FREQUENT_CHECK;
		2152
1423	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2153	wlist_del (&anfds[w->fd].head, (WL)w);
1424	ev_stop (EV_A_ (W)w);	2154	ev_stop (EV_A_ (W)w);
1425		2155
1426	fd_change (EV_A_ w->fd);	2156	fd_change (EV_A_ w->fd, 1);
1427	}
1428		2157
1429	void	2158	EV_FREQUENT_CHECK;
		2159	}
		2160
		2161	void noinline
1430	ev_timer_start (EV_P_ struct ev_timer *w)	2162	ev_timer_start (EV_P_ ev_timer *w)
1431	{	2163	{
1432	if (expect_false (ev_is_active (w)))	2164	if (expect_false (ev_is_active (w)))
1433	return;	2165	return;
1434		2166
1435	((WT)w)->at += mn_now;	2167	ev_at (w) += mn_now;
1436		2168
1437	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2169	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1438		2170
		2171	EV_FREQUENT_CHECK;
		2172
		2173	++timercnt;
1439	ev_start (EV_A_ (W)w, ++timercnt);	2174	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1440	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);	2175	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1441	timers [timercnt - 1] = w;	2176	ANHE_w (timers [ev_active (w)]) = (WT)w;
1442	upheap ((WT *)timers, timercnt - 1);	2177	ANHE_at_cache (timers [ev_active (w)]);
		2178	upheap (timers, ev_active (w));
1443		2179
		2180	EV_FREQUENT_CHECK;
		2181
1444	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2182	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1445	}	2183	}
1446		2184
1447	void	2185	void noinline
1448	ev_timer_stop (EV_P_ struct ev_timer *w)	2186	ev_timer_stop (EV_P_ ev_timer *w)
1449	{	2187	{
1450	ev_clear_pending (EV_A_ (W)w);	2188	clear_pending (EV_A_ (W)w);
1451	if (expect_false (!ev_is_active (w)))	2189	if (expect_false (!ev_is_active (w)))
1452	return;	2190	return;
1453		2191
		2192	EV_FREQUENT_CHECK;
		2193
		2194	{
		2195	int active = ev_active (w);
		2196
1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2197	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1455		2198
		2199	--timercnt;
		2200
1456	if (expect_true (((W)w)->active < timercnt--))	2201	if (expect_true (active < timercnt + HEAP0))
1457	{	2202	{
1458	timers [((W)w)->active - 1] = timers [timercnt];	2203	timers [active] = timers [timercnt + HEAP0];
1459	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2204	adjustheap (timers, timercnt, active);
1460	}	2205	}
		2206	}
1461		2207
1462	((WT)w)->at -= mn_now;	2208	EV_FREQUENT_CHECK;
		2209
		2210	ev_at (w) -= mn_now;
1463		2211
1464	ev_stop (EV_A_ (W)w);	2212	ev_stop (EV_A_ (W)w);
1465	}	2213	}
1466		2214
1467	void	2215	void noinline
1468	ev_timer_again (EV_P_ struct ev_timer *w)	2216	ev_timer_again (EV_P_ ev_timer *w)
1469	{	2217	{
		2218	EV_FREQUENT_CHECK;
		2219
1470	if (ev_is_active (w))	2220	if (ev_is_active (w))
1471	{	2221	{
1472	if (w->repeat)	2222	if (w->repeat)
1473	{	2223	{
1474	((WT)w)->at = mn_now + w->repeat;	2224	ev_at (w) = mn_now + w->repeat;
		2225	ANHE_at_cache (timers [ev_active (w)]);
1475	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2226	adjustheap (timers, timercnt, ev_active (w));
1476	}	2227	}
1477	else	2228	else
1478	ev_timer_stop (EV_A_ w);	2229	ev_timer_stop (EV_A_ w);
1479	}	2230	}
1480	else if (w->repeat)	2231	else if (w->repeat)
1481	{	2232	{
1482	w->at = w->repeat;	2233	ev_at (w) = w->repeat;
1483	ev_timer_start (EV_A_ w);	2234	ev_timer_start (EV_A_ w);
1484	}	2235	}
1485	}
1486		2236
		2237	EV_FREQUENT_CHECK;
		2238	}
		2239
1487	#if EV_PERIODICS	2240	#if EV_PERIODIC_ENABLE
1488	void	2241	void noinline
1489	ev_periodic_start (EV_P_ struct ev_periodic *w)	2242	ev_periodic_start (EV_P_ ev_periodic *w)
1490	{	2243	{
1491	if (expect_false (ev_is_active (w)))	2244	if (expect_false (ev_is_active (w)))
1492	return;	2245	return;
1493		2246
1494	if (w->reschedule_cb)	2247	if (w->reschedule_cb)
1495	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2248	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1496	else if (w->interval)	2249	else if (w->interval)
1497	{	2250	{
1498	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2251	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1499	/* this formula differs from the one in periodic_reify because we do not always round up */	2252	/* this formula differs from the one in periodic_reify because we do not always round up */
1500	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2253	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1501	}	2254	}
		2255	else
		2256	ev_at (w) = w->offset;
1502		2257
		2258	EV_FREQUENT_CHECK;
		2259
		2260	++periodiccnt;
1503	ev_start (EV_A_ (W)w, ++periodiccnt);	2261	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1504	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2262	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1505	periodics [periodiccnt - 1] = w;	2263	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1506	upheap ((WT *)periodics, periodiccnt - 1);	2264	ANHE_at_cache (periodics [ev_active (w)]);
		2265	upheap (periodics, ev_active (w));
1507		2266
		2267	EV_FREQUENT_CHECK;
		2268
1508	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2269	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1509	}	2270	}
1510		2271
1511	void	2272	void noinline
1512	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2273	ev_periodic_stop (EV_P_ ev_periodic *w)
1513	{	2274	{
1514	ev_clear_pending (EV_A_ (W)w);	2275	clear_pending (EV_A_ (W)w);
1515	if (expect_false (!ev_is_active (w)))	2276	if (expect_false (!ev_is_active (w)))
1516	return;	2277	return;
1517		2278
		2279	EV_FREQUENT_CHECK;
		2280
		2281	{
		2282	int active = ev_active (w);
		2283
1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2284	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1519		2285
		2286	--periodiccnt;
		2287
1520	if (expect_true (((W)w)->active < periodiccnt--))	2288	if (expect_true (active < periodiccnt + HEAP0))
1521	{	2289	{
1522	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2290	periodics [active] = periodics [periodiccnt + HEAP0];
1523	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2291	adjustheap (periodics, periodiccnt, active);
1524	}	2292	}
		2293	}
		2294
		2295	EV_FREQUENT_CHECK;
1525		2296
1526	ev_stop (EV_A_ (W)w);	2297	ev_stop (EV_A_ (W)w);
1527	}	2298	}
1528		2299
1529	void	2300	void noinline
1530	ev_periodic_again (EV_P_ struct ev_periodic *w)	2301	ev_periodic_again (EV_P_ ev_periodic *w)
1531	{	2302	{
1532	/* TODO: use adjustheap and recalculation */	2303	/* TODO: use adjustheap and recalculation */
1533	ev_periodic_stop (EV_A_ w);	2304	ev_periodic_stop (EV_A_ w);
1534	ev_periodic_start (EV_A_ w);	2305	ev_periodic_start (EV_A_ w);
1535	}	2306	}
1536	#endif	2307	#endif
1537		2308
1538	void	2309	#ifndef SA_RESTART
1539	ev_idle_start (EV_P_ struct ev_idle *w)	2310	# define SA_RESTART 0
		2311	#endif
		2312
		2313	void noinline
		2314	ev_signal_start (EV_P_ ev_signal *w)
1540	{	2315	{
		2316	#if EV_MULTIPLICITY
		2317	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2318	#endif
1541	if (expect_false (ev_is_active (w)))	2319	if (expect_false (ev_is_active (w)))
1542	return;	2320	return;
1543		2321
1544	ev_start (EV_A_ (W)w, ++idlecnt);
1545	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1546	idles [idlecnt - 1] = w;
1547	}
1548
1549	void
1550	ev_idle_stop (EV_P_ struct ev_idle *w)
1551	{
1552	ev_clear_pending (EV_A_ (W)w);
1553	if (expect_false (!ev_is_active (w)))
1554	return;
1555
1556	idles [((W)w)->active - 1] = idles [--idlecnt];
1557	ev_stop (EV_A_ (W)w);
1558	}
1559
1560	void
1561	ev_prepare_start (EV_P_ struct ev_prepare *w)
1562	{
1563	if (expect_false (ev_is_active (w)))
1564	return;
1565
1566	ev_start (EV_A_ (W)w, ++preparecnt);
1567	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1568	prepares [preparecnt - 1] = w;
1569	}
1570
1571	void
1572	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1573	{
1574	ev_clear_pending (EV_A_ (W)w);
1575	if (expect_false (!ev_is_active (w)))
1576	return;
1577
1578	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1579	ev_stop (EV_A_ (W)w);
1580	}
1581
1582	void
1583	ev_check_start (EV_P_ struct ev_check *w)
1584	{
1585	if (expect_false (ev_is_active (w)))
1586	return;
1587
1588	ev_start (EV_A_ (W)w, ++checkcnt);
1589	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1590	checks [checkcnt - 1] = w;
1591	}
1592
1593	void
1594	ev_check_stop (EV_P_ struct ev_check *w)
1595	{
1596	ev_clear_pending (EV_A_ (W)w);
1597	if (expect_false (!ev_is_active (w)))
1598	return;
1599
1600	checks [((W)w)->active - 1] = checks [--checkcnt];
1601	ev_stop (EV_A_ (W)w);
1602	}
1603
1604	#ifndef SA_RESTART
1605	# define SA_RESTART 0
1606	#endif
1607
1608	void
1609	ev_signal_start (EV_P_ struct ev_signal *w)
1610	{
1611	#if EV_MULTIPLICITY
1612	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1613	#endif
1614	if (expect_false (ev_is_active (w)))
1615	return;
1616
1617	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2322	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1618		2323
		2324	evpipe_init (EV_A);
		2325
		2326	EV_FREQUENT_CHECK;
		2327
		2328	{
		2329	#ifndef _WIN32
		2330	sigset_t full, prev;
		2331	sigfillset (&full);
		2332	sigprocmask (SIG_SETMASK, &full, &prev);
		2333	#endif
		2334
		2335	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2336
		2337	#ifndef _WIN32
		2338	sigprocmask (SIG_SETMASK, &prev, 0);
		2339	#endif
		2340	}
		2341
1619	ev_start (EV_A_ (W)w, 1);	2342	ev_start (EV_A_ (W)w, 1);
1620	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1621	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2343	wlist_add (&signals [w->signum - 1].head, (WL)w);
1622		2344
1623	if (!((WL)w)->next)	2345	if (!((WL)w)->next)
1624	{	2346	{
1625	#if _WIN32	2347	#if _WIN32
1626	signal (w->signum, sighandler);	2348	signal (w->signum, ev_sighandler);
1627	#else	2349	#else
1628	struct sigaction sa;	2350	struct sigaction sa;
1629	sa.sa_handler = sighandler;	2351	sa.sa_handler = ev_sighandler;
1630	sigfillset (&sa.sa_mask);	2352	sigfillset (&sa.sa_mask);
1631	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2353	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1632	sigaction (w->signum, &sa, 0);	2354	sigaction (w->signum, &sa, 0);
1633	#endif	2355	#endif
1634	}	2356	}
1635	}
1636		2357
1637	void	2358	EV_FREQUENT_CHECK;
		2359	}
		2360
		2361	void noinline
1638	ev_signal_stop (EV_P_ struct ev_signal *w)	2362	ev_signal_stop (EV_P_ ev_signal *w)
1639	{	2363	{
1640	ev_clear_pending (EV_A_ (W)w);	2364	clear_pending (EV_A_ (W)w);
1641	if (expect_false (!ev_is_active (w)))	2365	if (expect_false (!ev_is_active (w)))
1642	return;	2366	return;
1643		2367
		2368	EV_FREQUENT_CHECK;
		2369
1644	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2370	wlist_del (&signals [w->signum - 1].head, (WL)w);
1645	ev_stop (EV_A_ (W)w);	2371	ev_stop (EV_A_ (W)w);
1646		2372
1647	if (!signals [w->signum - 1].head)	2373	if (!signals [w->signum - 1].head)
1648	signal (w->signum, SIG_DFL);	2374	signal (w->signum, SIG_DFL);
1649	}
1650		2375
		2376	EV_FREQUENT_CHECK;
		2377	}
		2378
1651	void	2379	void
1652	ev_child_start (EV_P_ struct ev_child *w)	2380	ev_child_start (EV_P_ ev_child *w)
1653	{	2381	{
1654	#if EV_MULTIPLICITY	2382	#if EV_MULTIPLICITY
1655	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2383	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1656	#endif	2384	#endif
1657	if (expect_false (ev_is_active (w)))	2385	if (expect_false (ev_is_active (w)))
1658	return;	2386	return;
1659		2387
		2388	EV_FREQUENT_CHECK;
		2389
1660	ev_start (EV_A_ (W)w, 1);	2390	ev_start (EV_A_ (W)w, 1);
1661	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2391	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1662	}
1663		2392
		2393	EV_FREQUENT_CHECK;
		2394	}
		2395
1664	void	2396	void
1665	ev_child_stop (EV_P_ struct ev_child *w)	2397	ev_child_stop (EV_P_ ev_child *w)
1666	{	2398	{
1667	ev_clear_pending (EV_A_ (W)w);	2399	clear_pending (EV_A_ (W)w);
1668	if (expect_false (!ev_is_active (w)))	2400	if (expect_false (!ev_is_active (w)))
1669	return;	2401	return;
1670		2402
		2403	EV_FREQUENT_CHECK;
		2404
1671	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2405	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1672	ev_stop (EV_A_ (W)w);	2406	ev_stop (EV_A_ (W)w);
1673	}
1674		2407
1675	#if EV_MULTIPLICITY	2408	EV_FREQUENT_CHECK;
		2409	}
		2410
		2411	#if EV_STAT_ENABLE
		2412
		2413	# ifdef _WIN32
		2414	# undef lstat
		2415	# define lstat(a,b) _stati64 (a,b)
		2416	# endif
		2417
		2418	#define DEF_STAT_INTERVAL 5.0074891
		2419	#define MIN_STAT_INTERVAL 0.1074891
		2420
		2421	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2422
		2423	#if EV_USE_INOTIFY
		2424	# define EV_INOTIFY_BUFSIZE 8192
		2425
		2426	static void noinline
		2427	infy_add (EV_P_ ev_stat *w)
		2428	{
		2429	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		2430
		2431	if (w->wd < 0)
		2432	{
		2433	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2434
		2435	/* monitor some parent directory for speedup hints */
		2436	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2437	/* but an efficiency issue only */
		2438	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2439	{
		2440	char path [4096];
		2441	strcpy (path, w->path);
		2442
		2443	do
		2444	{
		2445	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2446	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2447
		2448	char *pend = strrchr (path, '/');
		2449
		2450	if (!pend)
		2451	break; /* whoops, no '/', complain to your admin */
		2452
		2453	*pend = 0;
		2454	w->wd = inotify_add_watch (fs_fd, path, mask);
		2455	}
		2456	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2457	}
		2458	}
		2459	else
		2460	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2461
		2462	if (w->wd >= 0)
		2463	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2464	}
		2465
		2466	static void noinline
		2467	infy_del (EV_P_ ev_stat *w)
		2468	{
		2469	int slot;
		2470	int wd = w->wd;
		2471
		2472	if (wd < 0)
		2473	return;
		2474
		2475	w->wd = -2;
		2476	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2477	wlist_del (&fs_hash [slot].head, (WL)w);
		2478
		2479	/* remove this watcher, if others are watching it, they will rearm */
		2480	inotify_rm_watch (fs_fd, wd);
		2481	}
		2482
		2483	static void noinline
		2484	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2485	{
		2486	if (slot < 0)
		2487	/* overflow, need to check for all hahs slots */
		2488	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2489	infy_wd (EV_A_ slot, wd, ev);
		2490	else
		2491	{
		2492	WL w_;
		2493
		2494	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2495	{
		2496	ev_stat *w = (ev_stat *)w_;
		2497	w_ = w_->next; /* lets us remove this watcher and all before it */
		2498
		2499	if (w->wd == wd || wd == -1)
		2500	{
		2501	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2502	{
		2503	w->wd = -1;
		2504	infy_add (EV_A_ w); /* re-add, no matter what */
		2505	}
		2506
		2507	stat_timer_cb (EV_A_ &w->timer, 0);
		2508	}
		2509	}
		2510	}
		2511	}
		2512
1676	static void	2513	static void
1677	embed_cb (EV_P_ struct ev_io *io, int revents)	2514	infy_cb (EV_P_ ev_io *w, int revents)
1678	{	2515	{
1679	struct ev_embed *w = (struct ev_embed *)(((char *)io) - offsetof (struct ev_embed, io));	2516	char buf [EV_INOTIFY_BUFSIZE];
		2517	struct inotify_event *ev = (struct inotify_event *)buf;
		2518	int ofs;
		2519	int len = read (fs_fd, buf, sizeof (buf));
1680		2520
		2521	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2522	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2523	}
		2524
		2525	void inline_size
		2526	infy_init (EV_P)
		2527	{
		2528	if (fs_fd != -2)
		2529	return;
		2530
		2531	fs_fd = inotify_init ();
		2532
		2533	if (fs_fd >= 0)
		2534	{
		2535	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2536	ev_set_priority (&fs_w, EV_MAXPRI);
		2537	ev_io_start (EV_A_ &fs_w);
		2538	}
		2539	}
		2540
		2541	void inline_size
		2542	infy_fork (EV_P)
		2543	{
		2544	int slot;
		2545
		2546	if (fs_fd < 0)
		2547	return;
		2548
		2549	close (fs_fd);
		2550	fs_fd = inotify_init ();
		2551
		2552	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2553	{
		2554	WL w_ = fs_hash [slot].head;
		2555	fs_hash [slot].head = 0;
		2556
		2557	while (w_)
		2558	{
		2559	ev_stat *w = (ev_stat *)w_;
		2560	w_ = w_->next; /* lets us add this watcher */
		2561
		2562	w->wd = -1;
		2563
		2564	if (fs_fd >= 0)
		2565	infy_add (EV_A_ w); /* re-add, no matter what */
		2566	else
		2567	ev_timer_start (EV_A_ &w->timer);
		2568	}
		2569
		2570	}
		2571	}
		2572
		2573	#endif
		2574
		2575	#ifdef _WIN32
		2576	# define EV_LSTAT(p,b) _stati64 (p, b)
		2577	#else
		2578	# define EV_LSTAT(p,b) lstat (p, b)
		2579	#endif
		2580
		2581	void
		2582	ev_stat_stat (EV_P_ ev_stat *w)
		2583	{
		2584	if (lstat (w->path, &w->attr) < 0)
		2585	w->attr.st_nlink = 0;
		2586	else if (!w->attr.st_nlink)
		2587	w->attr.st_nlink = 1;
		2588	}
		2589
		2590	static void noinline
		2591	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2592	{
		2593	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2594
		2595	/* we copy this here each the time so that */
		2596	/* prev has the old value when the callback gets invoked */
		2597	w->prev = w->attr;
		2598	ev_stat_stat (EV_A_ w);
		2599
		2600	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2601	if (
		2602	w->prev.st_dev != w->attr.st_dev
		2603	|| w->prev.st_ino != w->attr.st_ino
		2604	|| w->prev.st_mode != w->attr.st_mode
		2605	|| w->prev.st_nlink != w->attr.st_nlink
		2606	|| w->prev.st_uid != w->attr.st_uid
		2607	|| w->prev.st_gid != w->attr.st_gid
		2608	|| w->prev.st_rdev != w->attr.st_rdev
		2609	|| w->prev.st_size != w->attr.st_size
		2610	|| w->prev.st_atime != w->attr.st_atime
		2611	|| w->prev.st_mtime != w->attr.st_mtime
		2612	|| w->prev.st_ctime != w->attr.st_ctime
		2613	) {
		2614	#if EV_USE_INOTIFY
		2615	infy_del (EV_A_ w);
		2616	infy_add (EV_A_ w);
		2617	ev_stat_stat (EV_A_ w); /* avoid race... */
		2618	#endif
		2619
1681	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2620	ev_feed_event (EV_A_ w, EV_STAT);
1682	ev_loop (w->loop, EVLOOP_NONBLOCK);	2621	}
1683	}	2622	}
1684		2623
1685	void	2624	void
1686	ev_embed_start (EV_P_ struct ev_embed *w)	2625	ev_stat_start (EV_P_ ev_stat *w)
1687	{	2626	{
1688	if (expect_false (ev_is_active (w)))	2627	if (expect_false (ev_is_active (w)))
1689	return;	2628	return;
1690		2629
1691	{	2630	/* since we use memcmp, we need to clear any padding data etc. */
1692	struct ev_loop *loop = w->loop;	2631	memset (&w->prev, 0, sizeof (ev_statdata));
1693	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2632	memset (&w->attr, 0, sizeof (ev_statdata));
1694	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
1695	}
1696		2633
		2634	ev_stat_stat (EV_A_ w);
		2635
		2636	if (w->interval < MIN_STAT_INTERVAL)
		2637	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2638
		2639	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2640	ev_set_priority (&w->timer, ev_priority (w));
		2641
		2642	#if EV_USE_INOTIFY
		2643	infy_init (EV_A);
		2644
		2645	if (fs_fd >= 0)
		2646	infy_add (EV_A_ w);
		2647	else
		2648	#endif
1697	ev_io_start (EV_A_ &w->io);	2649	ev_timer_start (EV_A_ &w->timer);
		2650
1698	ev_start (EV_A_ (W)w, 1);	2651	ev_start (EV_A_ (W)w, 1);
1699	}
1700		2652
		2653	EV_FREQUENT_CHECK;
		2654	}
		2655
1701	void	2656	void
1702	ev_embed_stop (EV_P_ struct ev_embed *w)	2657	ev_stat_stop (EV_P_ ev_stat *w)
1703	{	2658	{
1704	ev_clear_pending (EV_A_ (W)w);	2659	clear_pending (EV_A_ (W)w);
1705	if (expect_false (!ev_is_active (w)))	2660	if (expect_false (!ev_is_active (w)))
1706	return;	2661	return;
1707		2662
		2663	EV_FREQUENT_CHECK;
		2664
		2665	#if EV_USE_INOTIFY
		2666	infy_del (EV_A_ w);
		2667	#endif
		2668	ev_timer_stop (EV_A_ &w->timer);
		2669
		2670	ev_stop (EV_A_ (W)w);
		2671
		2672	EV_FREQUENT_CHECK;
		2673	}
		2674	#endif
		2675
		2676	#if EV_IDLE_ENABLE
		2677	void
		2678	ev_idle_start (EV_P_ ev_idle *w)
		2679	{
		2680	if (expect_false (ev_is_active (w)))
		2681	return;
		2682
		2683	pri_adjust (EV_A_ (W)w);
		2684
		2685	EV_FREQUENT_CHECK;
		2686
		2687	{
		2688	int active = ++idlecnt [ABSPRI (w)];
		2689
		2690	++idleall;
		2691	ev_start (EV_A_ (W)w, active);
		2692
		2693	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2694	idles [ABSPRI (w)][active - 1] = w;
		2695	}
		2696
		2697	EV_FREQUENT_CHECK;
		2698	}
		2699
		2700	void
		2701	ev_idle_stop (EV_P_ ev_idle *w)
		2702	{
		2703	clear_pending (EV_A_ (W)w);
		2704	if (expect_false (!ev_is_active (w)))
		2705	return;
		2706
		2707	EV_FREQUENT_CHECK;
		2708
		2709	{
		2710	int active = ev_active (w);
		2711
		2712	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2713	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2714
		2715	ev_stop (EV_A_ (W)w);
		2716	--idleall;
		2717	}
		2718
		2719	EV_FREQUENT_CHECK;
		2720	}
		2721	#endif
		2722
		2723	void
		2724	ev_prepare_start (EV_P_ ev_prepare *w)
		2725	{
		2726	if (expect_false (ev_is_active (w)))
		2727	return;
		2728
		2729	EV_FREQUENT_CHECK;
		2730
		2731	ev_start (EV_A_ (W)w, ++preparecnt);
		2732	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2733	prepares [preparecnt - 1] = w;
		2734
		2735	EV_FREQUENT_CHECK;
		2736	}
		2737
		2738	void
		2739	ev_prepare_stop (EV_P_ ev_prepare *w)
		2740	{
		2741	clear_pending (EV_A_ (W)w);
		2742	if (expect_false (!ev_is_active (w)))
		2743	return;
		2744
		2745	EV_FREQUENT_CHECK;
		2746
		2747	{
		2748	int active = ev_active (w);
		2749
		2750	prepares [active - 1] = prepares [--preparecnt];
		2751	ev_active (prepares [active - 1]) = active;
		2752	}
		2753
		2754	ev_stop (EV_A_ (W)w);
		2755
		2756	EV_FREQUENT_CHECK;
		2757	}
		2758
		2759	void
		2760	ev_check_start (EV_P_ ev_check *w)
		2761	{
		2762	if (expect_false (ev_is_active (w)))
		2763	return;
		2764
		2765	EV_FREQUENT_CHECK;
		2766
		2767	ev_start (EV_A_ (W)w, ++checkcnt);
		2768	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2769	checks [checkcnt - 1] = w;
		2770
		2771	EV_FREQUENT_CHECK;
		2772	}
		2773
		2774	void
		2775	ev_check_stop (EV_P_ ev_check *w)
		2776	{
		2777	clear_pending (EV_A_ (W)w);
		2778	if (expect_false (!ev_is_active (w)))
		2779	return;
		2780
		2781	EV_FREQUENT_CHECK;
		2782
		2783	{
		2784	int active = ev_active (w);
		2785
		2786	checks [active - 1] = checks [--checkcnt];
		2787	ev_active (checks [active - 1]) = active;
		2788	}
		2789
		2790	ev_stop (EV_A_ (W)w);
		2791
		2792	EV_FREQUENT_CHECK;
		2793	}
		2794
		2795	#if EV_EMBED_ENABLE
		2796	void noinline
		2797	ev_embed_sweep (EV_P_ ev_embed *w)
		2798	{
		2799	ev_loop (w->other, EVLOOP_NONBLOCK);
		2800	}
		2801
		2802	static void
		2803	embed_io_cb (EV_P_ ev_io *io, int revents)
		2804	{
		2805	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2806
		2807	if (ev_cb (w))
		2808	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2809	else
		2810	ev_loop (w->other, EVLOOP_NONBLOCK);
		2811	}
		2812
		2813	static void
		2814	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2815	{
		2816	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2817
		2818	{
		2819	struct ev_loop *loop = w->other;
		2820
		2821	while (fdchangecnt)
		2822	{
		2823	fd_reify (EV_A);
		2824	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2825	}
		2826	}
		2827	}
		2828
		2829	#if 0
		2830	static void
		2831	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2832	{
		2833	ev_idle_stop (EV_A_ idle);
		2834	}
		2835	#endif
		2836
		2837	void
		2838	ev_embed_start (EV_P_ ev_embed *w)
		2839	{
		2840	if (expect_false (ev_is_active (w)))
		2841	return;
		2842
		2843	{
		2844	struct ev_loop *loop = w->other;
		2845	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2846	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2847	}
		2848
		2849	EV_FREQUENT_CHECK;
		2850
		2851	ev_set_priority (&w->io, ev_priority (w));
		2852	ev_io_start (EV_A_ &w->io);
		2853
		2854	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2855	ev_set_priority (&w->prepare, EV_MINPRI);
		2856	ev_prepare_start (EV_A_ &w->prepare);
		2857
		2858	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2859
		2860	ev_start (EV_A_ (W)w, 1);
		2861
		2862	EV_FREQUENT_CHECK;
		2863	}
		2864
		2865	void
		2866	ev_embed_stop (EV_P_ ev_embed *w)
		2867	{
		2868	clear_pending (EV_A_ (W)w);
		2869	if (expect_false (!ev_is_active (w)))
		2870	return;
		2871
		2872	EV_FREQUENT_CHECK;
		2873
1708	ev_io_stop (EV_A_ &w->io);	2874	ev_io_stop (EV_A_ &w->io);
		2875	ev_prepare_stop (EV_A_ &w->prepare);
		2876
1709	ev_stop (EV_A_ (W)w);	2877	ev_stop (EV_A_ (W)w);
		2878
		2879	EV_FREQUENT_CHECK;
		2880	}
		2881	#endif
		2882
		2883	#if EV_FORK_ENABLE
		2884	void
		2885	ev_fork_start (EV_P_ ev_fork *w)
		2886	{
		2887	if (expect_false (ev_is_active (w)))
		2888	return;
		2889
		2890	EV_FREQUENT_CHECK;
		2891
		2892	ev_start (EV_A_ (W)w, ++forkcnt);
		2893	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2894	forks [forkcnt - 1] = w;
		2895
		2896	EV_FREQUENT_CHECK;
		2897	}
		2898
		2899	void
		2900	ev_fork_stop (EV_P_ ev_fork *w)
		2901	{
		2902	clear_pending (EV_A_ (W)w);
		2903	if (expect_false (!ev_is_active (w)))
		2904	return;
		2905
		2906	EV_FREQUENT_CHECK;
		2907
		2908	{
		2909	int active = ev_active (w);
		2910
		2911	forks [active - 1] = forks [--forkcnt];
		2912	ev_active (forks [active - 1]) = active;
		2913	}
		2914
		2915	ev_stop (EV_A_ (W)w);
		2916
		2917	EV_FREQUENT_CHECK;
		2918	}
		2919	#endif
		2920
		2921	#if EV_ASYNC_ENABLE
		2922	void
		2923	ev_async_start (EV_P_ ev_async *w)
		2924	{
		2925	if (expect_false (ev_is_active (w)))
		2926	return;
		2927
		2928	evpipe_init (EV_A);
		2929
		2930	EV_FREQUENT_CHECK;
		2931
		2932	ev_start (EV_A_ (W)w, ++asynccnt);
		2933	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2934	asyncs [asynccnt - 1] = w;
		2935
		2936	EV_FREQUENT_CHECK;
		2937	}
		2938
		2939	void
		2940	ev_async_stop (EV_P_ ev_async *w)
		2941	{
		2942	clear_pending (EV_A_ (W)w);
		2943	if (expect_false (!ev_is_active (w)))
		2944	return;
		2945
		2946	EV_FREQUENT_CHECK;
		2947
		2948	{
		2949	int active = ev_active (w);
		2950
		2951	asyncs [active - 1] = asyncs [--asynccnt];
		2952	ev_active (asyncs [active - 1]) = active;
		2953	}
		2954
		2955	ev_stop (EV_A_ (W)w);
		2956
		2957	EV_FREQUENT_CHECK;
		2958	}
		2959
		2960	void
		2961	ev_async_send (EV_P_ ev_async *w)
		2962	{
		2963	w->sent = 1;
		2964	evpipe_write (EV_A_ &gotasync);
1710	}	2965	}
1711	#endif	2966	#endif
1712		2967
1713	/*****************************************************************************/	2968	/*****************************************************************************/
1714		2969
1715	struct ev_once	2970	struct ev_once
1716	{	2971	{
1717	struct ev_io io;	2972	ev_io io;
1718	struct ev_timer to;	2973	ev_timer to;
1719	void (*cb)(int revents, void *arg);	2974	void (*cb)(int revents, void *arg);
1720	void *arg;	2975	void *arg;
1721	};	2976	};
1722		2977
1723	static void	2978	static void
…		…
1732		2987
1733	cb (revents, arg);	2988	cb (revents, arg);
1734	}	2989	}
1735		2990
1736	static void	2991	static void
1737	once_cb_io (EV_P_ struct ev_io *w, int revents)	2992	once_cb_io (EV_P_ ev_io *w, int revents)
1738	{	2993	{
1739	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2994	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1740	}	2995	}
1741		2996
1742	static void	2997	static void
1743	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2998	once_cb_to (EV_P_ ev_timer *w, int revents)
1744	{	2999	{
1745	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3000	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1746	}	3001	}
1747		3002
1748	void	3003	void
…		…
1772	ev_timer_set (&once->to, timeout, 0.);	3027	ev_timer_set (&once->to, timeout, 0.);
1773	ev_timer_start (EV_A_ &once->to);	3028	ev_timer_start (EV_A_ &once->to);
1774	}	3029	}
1775	}	3030	}
1776		3031
		3032	#if EV_MULTIPLICITY
		3033	#include "ev_wrap.h"
		3034	#endif
		3035
1777	#ifdef __cplusplus	3036	#ifdef __cplusplus
1778	}	3037	}
1779	#endif	3038	#endif
1780		3039

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