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Comparing libev/ev.c (file contents):
Revision 1.127 by root, Sun Nov 18 02:17:57 2007 UTC vs.
Revision 1.264 by root, Mon Oct 13 23:20:12 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
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
37	# include "config.h"	49	# include "config.h"
		50	# endif
38		51
39	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
40	# ifndef EV_USE_MONOTONIC	53	# ifndef EV_USE_MONOTONIC
41	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
42	# endif	55	# endif
…		…
47	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
48	# define EV_USE_MONOTONIC 0	61	# define EV_USE_MONOTONIC 0
49	# endif	62	# endif
50	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
51	# 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
52	# endif	73	# endif
53	# endif	74	# endif
54		75
55	# ifndef EV_USE_SELECT	76	# ifndef EV_USE_SELECT
56	# if HAVE_SELECT && HAVE_SYS_SELECT_H	77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
90	# else	111	# else
91	# define EV_USE_PORT 0	112	# define EV_USE_PORT 0
92	# endif	113	# endif
93	# endif	114	# endif
94		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
95	#endif	132	#endif
96		133
97	#include <math.h>	134	#include <math.h>
98	#include <stdlib.h>	135	#include <stdlib.h>
99	#include <fcntl.h>	136	#include <fcntl.h>
…		…
106	#include <sys/types.h>	143	#include <sys/types.h>
107	#include <time.h>	144	#include <time.h>
108		145
109	#include <signal.h>	146	#include <signal.h>
110		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
111	#ifndef _WIN32	154	#ifndef _WIN32
112	# include <unistd.h>
113	# include <sys/time.h>	155	# include <sys/time.h>
114	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
115	#else	158	#else
		159	# include <io.h>
116	# define WIN32_LEAN_AND_MEAN	160	# define WIN32_LEAN_AND_MEAN
117	# include <windows.h>	161	# include <windows.h>
118	# ifndef EV_SELECT_IS_WINSOCKET	162	# ifndef EV_SELECT_IS_WINSOCKET
119	# define EV_SELECT_IS_WINSOCKET 1	163	# define EV_SELECT_IS_WINSOCKET 1
120	# endif	164	# endif
121	#endif	165	#endif
122		166
123	/**/	167	/* this block tries to deduce configuration from header-defined symbols and defaults */
124		168
125	#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
126	# define EV_USE_MONOTONIC 0	173	# define EV_USE_MONOTONIC 0
		174	# endif
127	#endif	175	#endif
128		176
129	#ifndef EV_USE_REALTIME	177	#ifndef EV_USE_REALTIME
130	# 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
131	#endif	187	#endif
132		188
133	#ifndef EV_USE_SELECT	189	#ifndef EV_USE_SELECT
134	# define EV_USE_SELECT 1	190	# define EV_USE_SELECT 1
135	#endif	191	#endif
…		…
141	# define EV_USE_POLL 1	197	# define EV_USE_POLL 1
142	# endif	198	# endif
143	#endif	199	#endif
144		200
145	#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
146	# define EV_USE_EPOLL 0	205	# define EV_USE_EPOLL 0
		206	# endif
147	#endif	207	#endif
148		208
149	#ifndef EV_USE_KQUEUE	209	#ifndef EV_USE_KQUEUE
150	# define EV_USE_KQUEUE 0	210	# define EV_USE_KQUEUE 0
151	#endif	211	#endif
152		212
153	#ifndef EV_USE_PORT	213	#ifndef EV_USE_PORT
154	# define EV_USE_PORT 0	214	# define EV_USE_PORT 0
155	#endif	215	#endif
156		216
157	/**/	217	#ifndef EV_USE_INOTIFY
158		218	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
159	/* darwin simply cannot be helped */	219	# define EV_USE_INOTIFY 1
160	#ifdef __APPLE__	220	# else
161	# undef EV_USE_POLL	221	# define EV_USE_INOTIFY 0
162	# undef EV_USE_KQUEUE
163	#endif	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 */
164		268
165	#ifndef CLOCK_MONOTONIC	269	#ifndef CLOCK_MONOTONIC
166	# undef EV_USE_MONOTONIC	270	# undef EV_USE_MONOTONIC
167	# define EV_USE_MONOTONIC 0	271	# define EV_USE_MONOTONIC 0
168	#endif	272	#endif
…		…
170	#ifndef CLOCK_REALTIME	274	#ifndef CLOCK_REALTIME
171	# undef EV_USE_REALTIME	275	# undef EV_USE_REALTIME
172	# define EV_USE_REALTIME 0	276	# define EV_USE_REALTIME 0
173	#endif	277	#endif
174		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/utsname.h>
		292	# include <sys/inotify.h>
		293	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		294	# ifndef IN_DONT_FOLLOW
		295	# undef EV_USE_INOTIFY
		296	# define EV_USE_INOTIFY 0
		297	# endif
		298	#endif
		299
175	#if EV_SELECT_IS_WINSOCKET	300	#if EV_SELECT_IS_WINSOCKET
176	# include <winsock.h>	301	# include <winsock.h>
177	#endif	302	#endif
178		303
		304	#if EV_USE_EVENTFD
		305	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		306	# include <stdint.h>
		307	# ifdef __cplusplus
		308	extern "C" {
		309	# endif
		310	int eventfd (unsigned int initval, int flags);
		311	# ifdef __cplusplus
		312	}
		313	# endif
		314	#endif
		315
179	/**/	316	/**/
		317
		318	#if EV_VERIFY >= 3
		319	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		320	#else
		321	# define EV_FREQUENT_CHECK do { } while (0)
		322	#endif
		323
		324	/*
		325	* This is used to avoid floating point rounding problems.
		326	* It is added to ev_rt_now when scheduling periodics
		327	* to ensure progress, time-wise, even when rounding
		328	* errors are against us.
		329	* This value is good at least till the year 4000.
		330	* Better solutions welcome.
		331	*/
		332	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
180		333
181	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	334	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
182	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	335	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
183	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
184	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	336	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
185		337
186	#ifdef EV_H
187	# include EV_H
188	#else
189	# include "ev.h"
190	#endif
191
192	#if __GNUC__ >= 3	338	#if __GNUC__ >= 4
193	# define expect(expr,value) __builtin_expect ((expr),(value))	339	# define expect(expr,value) __builtin_expect ((expr),(value))
194	# define inline static inline	340	# define noinline __attribute__ ((noinline))
195	#else	341	#else
196	# define expect(expr,value) (expr)	342	# define expect(expr,value) (expr)
197	# define inline static	343	# define noinline
		344	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		345	# define inline
		346	# endif
198	#endif	347	#endif
199		348
200	#define expect_false(expr) expect ((expr) != 0, 0)	349	#define expect_false(expr) expect ((expr) != 0, 0)
201	#define expect_true(expr) expect ((expr) != 0, 1)	350	#define expect_true(expr) expect ((expr) != 0, 1)
		351	#define inline_size static inline
		352
		353	#if EV_MINIMAL
		354	# define inline_speed static noinline
		355	#else
		356	# define inline_speed static inline
		357	#endif
202		358
203	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	359	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
204	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	360	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
205		361
206	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	362	#define EMPTY /* required for microsofts broken pseudo-c compiler */
207	#define EMPTY2(a,b) /* used to suppress some warnings */	363	#define EMPTY2(a,b) /* used to suppress some warnings */
208		364
209	typedef struct ev_watcher *W;	365	typedef ev_watcher *W;
210	typedef struct ev_watcher_list *WL;	366	typedef ev_watcher_list *WL;
211	typedef struct ev_watcher_time *WT;	367	typedef ev_watcher_time *WT;
212		368
		369	#define ev_active(w) ((W)(w))->active
		370	#define ev_at(w) ((WT)(w))->at
		371
		372	#if EV_USE_MONOTONIC
		373	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		374	/* giving it a reasonably high chance of working on typical architetcures */
213	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		376	#endif
214		377
215	#ifdef _WIN32	378	#ifdef _WIN32
216	# include "ev_win32.c"	379	# include "ev_win32.c"
217	#endif	380	#endif
218		381
219	/*****************************************************************************/	382	/*****************************************************************************/
220		383
221	static void (*syserr_cb)(const char *msg);	384	static void (*syserr_cb)(const char *msg);
222		385
		386	void
223	void ev_set_syserr_cb (void (*cb)(const char *msg))	387	ev_set_syserr_cb (void (*cb)(const char *msg))
224	{	388	{
225	syserr_cb = cb;	389	syserr_cb = cb;
226	}	390	}
227		391
228	static void	392	static void noinline
229	syserr (const char *msg)	393	syserr (const char *msg)
230	{	394	{
231	if (!msg)	395	if (!msg)
232	msg = "(libev) system error";	396	msg = "(libev) system error";
233		397
…		…
238	perror (msg);	402	perror (msg);
239	abort ();	403	abort ();
240	}	404	}
241	}	405	}
242		406
		407	static void *
		408	ev_realloc_emul (void *ptr, long size)
		409	{
		410	/* some systems, notably openbsd and darwin, fail to properly
		411	* implement realloc (x, 0) (as required by both ansi c-98 and
		412	* the single unix specification, so work around them here.
		413	*/
		414
		415	if (size)
		416	return realloc (ptr, size);
		417
		418	free (ptr);
		419	return 0;
		420	}
		421
243	static void *(*alloc)(void *ptr, long size);	422	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
244		423
		424	void
245	void ev_set_allocator (void *(*cb)(void *ptr, long size))	425	ev_set_allocator (void *(*cb)(void *ptr, long size))
246	{	426	{
247	alloc = cb;	427	alloc = cb;
248	}	428	}
249		429
250	static void *	430	inline_speed void *
251	ev_realloc (void *ptr, long size)	431	ev_realloc (void *ptr, long size)
252	{	432	{
253	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	433	ptr = alloc (ptr, size);
254		434
255	if (!ptr && size)	435	if (!ptr && size)
256	{	436	{
257	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	437	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
258	abort ();	438	abort ();
…		…
279	typedef struct	459	typedef struct
280	{	460	{
281	W w;	461	W w;
282	int events;	462	int events;
283	} ANPENDING;	463	} ANPENDING;
		464
		465	#if EV_USE_INOTIFY
		466	/* hash table entry per inotify-id */
		467	typedef struct
		468	{
		469	WL head;
		470	} ANFS;
		471	#endif
		472
		473	/* Heap Entry */
		474	#if EV_HEAP_CACHE_AT
		475	typedef struct {
		476	ev_tstamp at;
		477	WT w;
		478	} ANHE;
		479
		480	#define ANHE_w(he) (he).w /* access watcher, read-write */
		481	#define ANHE_at(he) (he).at /* access cached at, read-only */
		482	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		483	#else
		484	typedef WT ANHE;
		485
		486	#define ANHE_w(he) (he)
		487	#define ANHE_at(he) (he)->at
		488	#define ANHE_at_cache(he)
		489	#endif
284		490
285	#if EV_MULTIPLICITY	491	#if EV_MULTIPLICITY
286		492
287	struct ev_loop	493	struct ev_loop
288	{	494	{
…		…
322	gettimeofday (&tv, 0);	528	gettimeofday (&tv, 0);
323	return tv.tv_sec + tv.tv_usec * 1e-6;	529	return tv.tv_sec + tv.tv_usec * 1e-6;
324	#endif	530	#endif
325	}	531	}
326		532
327	inline ev_tstamp	533	ev_tstamp inline_size
328	get_clock (void)	534	get_clock (void)
329	{	535	{
330	#if EV_USE_MONOTONIC	536	#if EV_USE_MONOTONIC
331	if (expect_true (have_monotonic))	537	if (expect_true (have_monotonic))
332	{	538	{
…		…
345	{	551	{
346	return ev_rt_now;	552	return ev_rt_now;
347	}	553	}
348	#endif	554	#endif
349		555
350	#define array_roundsize(type,n) (((n) | 4) & ~3)	556	void
		557	ev_sleep (ev_tstamp delay)
		558	{
		559	if (delay > 0.)
		560	{
		561	#if EV_USE_NANOSLEEP
		562	struct timespec ts;
		563
		564	ts.tv_sec = (time_t)delay;
		565	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		566
		567	nanosleep (&ts, 0);
		568	#elif defined(_WIN32)
		569	Sleep ((unsigned long)(delay * 1e3));
		570	#else
		571	struct timeval tv;
		572
		573	tv.tv_sec = (time_t)delay;
		574	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		575
		576	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		577	/* somehting nto guaranteed by newer posix versions, but guaranteed */
		578	/* by older ones */
		579	select (0, 0, 0, 0, &tv);
		580	#endif
		581	}
		582	}
		583
		584	/*****************************************************************************/
		585
		586	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		587
		588	int inline_size
		589	array_nextsize (int elem, int cur, int cnt)
		590	{
		591	int ncur = cur + 1;
		592
		593	do
		594	ncur <<= 1;
		595	while (cnt > ncur);
		596
		597	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		598	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		599	{
		600	ncur *= elem;
		601	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		602	ncur = ncur - sizeof (void *) * 4;
		603	ncur /= elem;
		604	}
		605
		606	return ncur;
		607	}
		608
		609	static noinline void *
		610	array_realloc (int elem, void *base, int *cur, int cnt)
		611	{
		612	*cur = array_nextsize (elem, *cur, cnt);
		613	return ev_realloc (base, elem * *cur);
		614	}
351		615
352	#define array_needsize(type,base,cur,cnt,init) \	616	#define array_needsize(type,base,cur,cnt,init) \
353	if (expect_false ((cnt) > cur)) \	617	if (expect_false ((cnt) > (cur))) \
354	{ \	618	{ \
355	int newcnt = cur; \	619	int ocur_ = (cur); \
356	do \	620	(base) = (type *)array_realloc \
357	{ \	621	(sizeof (type), (base), &(cur), (cnt)); \
358	newcnt = array_roundsize (type, newcnt << 1); \	622	init ((base) + (ocur_), (cur) - ocur_); \
359	} \
360	while ((cnt) > newcnt); \
361	\
362	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
363	init (base + cur, newcnt - cur); \
364	cur = newcnt; \
365	}	623	}
366		624
		625	#if 0
367	#define array_slim(type,stem) \	626	#define array_slim(type,stem) \
368	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	627	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
369	{ \	628	{ \
370	stem ## max = array_roundsize (stem ## cnt >> 1); \	629	stem ## max = array_roundsize (stem ## cnt >> 1); \
371	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	630	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
372	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	631	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
373	}	632	}
		633	#endif
374		634
375	#define array_free(stem, idx) \	635	#define array_free(stem, idx) \
376	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	636	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
377		637
378	/*****************************************************************************/	638	/*****************************************************************************/
379		639
380	static void	640	void noinline
		641	ev_feed_event (EV_P_ void *w, int revents)
		642	{
		643	W w_ = (W)w;
		644	int pri = ABSPRI (w_);
		645
		646	if (expect_false (w_->pending))
		647	pendings [pri][w_->pending - 1].events |= revents;
		648	else
		649	{
		650	w_->pending = ++pendingcnt [pri];
		651	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		652	pendings [pri][w_->pending - 1].w = w_;
		653	pendings [pri][w_->pending - 1].events = revents;
		654	}
		655	}
		656
		657	void inline_speed
		658	queue_events (EV_P_ W *events, int eventcnt, int type)
		659	{
		660	int i;
		661
		662	for (i = 0; i < eventcnt; ++i)
		663	ev_feed_event (EV_A_ events [i], type);
		664	}
		665
		666	/*****************************************************************************/
		667
		668	void inline_size
381	anfds_init (ANFD *base, int count)	669	anfds_init (ANFD *base, int count)
382	{	670	{
383	while (count--)	671	while (count--)
384	{	672	{
385	base->head = 0;	673	base->head = 0;
…		…
388		676
389	++base;	677	++base;
390	}	678	}
391	}	679	}
392		680
393	void	681	void inline_speed
394	ev_feed_event (EV_P_ void *w, int revents)
395	{
396	W w_ = (W)w;
397
398	if (expect_false (w_->pending))
399	{
400	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
401	return;
402	}
403
404	w_->pending = ++pendingcnt [ABSPRI (w_)];
405	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
406	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
407	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
408	}
409
410	static void
411	queue_events (EV_P_ W *events, int eventcnt, int type)
412	{
413	int i;
414
415	for (i = 0; i < eventcnt; ++i)
416	ev_feed_event (EV_A_ events [i], type);
417	}
418
419	inline void
420	fd_event (EV_P_ int fd, int revents)	682	fd_event (EV_P_ int fd, int revents)
421	{	683	{
422	ANFD *anfd = anfds + fd;	684	ANFD *anfd = anfds + fd;
423	struct ev_io *w;	685	ev_io *w;
424		686
425	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	687	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
426	{	688	{
427	int ev = w->events & revents;	689	int ev = w->events & revents;
428		690
429	if (ev)	691	if (ev)
430	ev_feed_event (EV_A_ (W)w, ev);	692	ev_feed_event (EV_A_ (W)w, ev);
…		…
432	}	694	}
433		695
434	void	696	void
435	ev_feed_fd_event (EV_P_ int fd, int revents)	697	ev_feed_fd_event (EV_P_ int fd, int revents)
436	{	698	{
		699	if (fd >= 0 && fd < anfdmax)
437	fd_event (EV_A_ fd, revents);	700	fd_event (EV_A_ fd, revents);
438	}	701	}
439		702
440	/*****************************************************************************/	703	void inline_size
441
442	inline void
443	fd_reify (EV_P)	704	fd_reify (EV_P)
444	{	705	{
445	int i;	706	int i;
446		707
447	for (i = 0; i < fdchangecnt; ++i)	708	for (i = 0; i < fdchangecnt; ++i)
448	{	709	{
449	int fd = fdchanges [i];	710	int fd = fdchanges [i];
450	ANFD *anfd = anfds + fd;	711	ANFD *anfd = anfds + fd;
451	struct ev_io *w;	712	ev_io *w;
452		713
453	int events = 0;	714	unsigned char events = 0;
454		715
455	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	716	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
456	events |= w->events;	717	events |= (unsigned char)w->events;
457		718
458	#if EV_SELECT_IS_WINSOCKET	719	#if EV_SELECT_IS_WINSOCKET
459	if (events)	720	if (events)
460	{	721	{
461	unsigned long argp;	722	unsigned long arg;
		723	#ifdef EV_FD_TO_WIN32_HANDLE
		724	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		725	#else
462	anfd->handle = _get_osfhandle (fd);	726	anfd->handle = _get_osfhandle (fd);
		727	#endif
463	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	728	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
464	}	729	}
465	#endif	730	#endif
466		731
		732	{
		733	unsigned char o_events = anfd->events;
		734	unsigned char o_reify = anfd->reify;
		735
467	anfd->reify = 0;	736	anfd->reify = 0;
468
469	method_modify (EV_A_ fd, anfd->events, events);
470	anfd->events = events;	737	anfd->events = events;
		738
		739	if (o_events != events || o_reify & EV_IOFDSET)
		740	backend_modify (EV_A_ fd, o_events, events);
		741	}
471	}	742	}
472		743
473	fdchangecnt = 0;	744	fdchangecnt = 0;
474	}	745	}
475		746
476	static void	747	void inline_size
477	fd_change (EV_P_ int fd)	748	fd_change (EV_P_ int fd, int flags)
478	{	749	{
479	if (expect_false (anfds [fd].reify))	750	unsigned char reify = anfds [fd].reify;
480	return;
481
482	anfds [fd].reify = 1;	751	anfds [fd].reify |= flags;
483		752
		753	if (expect_true (!reify))
		754	{
484	++fdchangecnt;	755	++fdchangecnt;
485	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	756	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
486	fdchanges [fdchangecnt - 1] = fd;	757	fdchanges [fdchangecnt - 1] = fd;
		758	}
487	}	759	}
488		760
489	static void	761	void inline_speed
490	fd_kill (EV_P_ int fd)	762	fd_kill (EV_P_ int fd)
491	{	763	{
492	struct ev_io *w;	764	ev_io *w;
493		765
494	while ((w = (struct ev_io *)anfds [fd].head))	766	while ((w = (ev_io *)anfds [fd].head))
495	{	767	{
496	ev_io_stop (EV_A_ w);	768	ev_io_stop (EV_A_ w);
497	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	769	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
498	}	770	}
499	}	771	}
500		772
501	inline int	773	int inline_size
502	fd_valid (int fd)	774	fd_valid (int fd)
503	{	775	{
504	#ifdef _WIN32	776	#ifdef _WIN32
505	return _get_osfhandle (fd) != -1;	777	return _get_osfhandle (fd) != -1;
506	#else	778	#else
507	return fcntl (fd, F_GETFD) != -1;	779	return fcntl (fd, F_GETFD) != -1;
508	#endif	780	#endif
509	}	781	}
510		782
511	/* called on EBADF to verify fds */	783	/* called on EBADF to verify fds */
512	static void	784	static void noinline
513	fd_ebadf (EV_P)	785	fd_ebadf (EV_P)
514	{	786	{
515	int fd;	787	int fd;
516		788
517	for (fd = 0; fd < anfdmax; ++fd)	789	for (fd = 0; fd < anfdmax; ++fd)
518	if (anfds [fd].events)	790	if (anfds [fd].events)
519	if (!fd_valid (fd) == -1 && errno == EBADF)	791	if (!fd_valid (fd) && errno == EBADF)
520	fd_kill (EV_A_ fd);	792	fd_kill (EV_A_ fd);
521	}	793	}
522		794
523	/* called on ENOMEM in select/poll to kill some fds and retry */	795	/* called on ENOMEM in select/poll to kill some fds and retry */
524	static void	796	static void noinline
525	fd_enomem (EV_P)	797	fd_enomem (EV_P)
526	{	798	{
527	int fd;	799	int fd;
528		800
529	for (fd = anfdmax; fd--; )	801	for (fd = anfdmax; fd--; )
…		…
532	fd_kill (EV_A_ fd);	804	fd_kill (EV_A_ fd);
533	return;	805	return;
534	}	806	}
535	}	807	}
536		808
537	/* usually called after fork if method needs to re-arm all fds from scratch */	809	/* usually called after fork if backend needs to re-arm all fds from scratch */
538	static void	810	static void noinline
539	fd_rearm_all (EV_P)	811	fd_rearm_all (EV_P)
540	{	812	{
541	int fd;	813	int fd;
542		814
543	/* this should be highly optimised to not do anything but set a flag */
544	for (fd = 0; fd < anfdmax; ++fd)	815	for (fd = 0; fd < anfdmax; ++fd)
545	if (anfds [fd].events)	816	if (anfds [fd].events)
546	{	817	{
547	anfds [fd].events = 0;	818	anfds [fd].events = 0;
548	fd_change (EV_A_ fd);	819	fd_change (EV_A_ fd, EV_IOFDSET | 1);
549	}	820	}
550	}	821	}
551		822
552	/*****************************************************************************/	823	/*****************************************************************************/
553		824
554	static void	825	/*
555	upheap (WT *heap, int k)	826	* the heap functions want a real array index. array index 0 uis guaranteed to not
556	{	827	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
557	WT w = heap [k];	828	* the branching factor of the d-tree.
		829	*/
558		830
559	while (k && heap [k >> 1]->at > w->at)	831	/*
560	{	832	* at the moment we allow libev the luxury of two heaps,
561	heap [k] = heap [k >> 1];	833	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
562	((W)heap [k])->active = k + 1;	834	* which is more cache-efficient.
563	k >>= 1;	835	* the difference is about 5% with 50000+ watchers.
564	}	836	*/
		837	#if EV_USE_4HEAP
565		838
566	heap [k] = w;	839	#define DHEAP 4
567	((W)heap [k])->active = k + 1;	840	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		841	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		842	#define UPHEAP_DONE(p,k) ((p) == (k))
568		843
569	}	844	/* away from the root */
570		845	void inline_speed
571	static void
572	downheap (WT *heap, int N, int k)	846	downheap (ANHE *heap, int N, int k)
573	{	847	{
574	WT w = heap [k];	848	ANHE he = heap [k];
		849	ANHE *E = heap + N + HEAP0;
575		850
576	while (k < (N >> 1))	851	for (;;)
577	{	852	{
578	int j = k << 1;	853	ev_tstamp minat;
		854	ANHE *minpos;
		855	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
579		856
580	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	857	/* find minimum child */
		858	if (expect_true (pos + DHEAP - 1 < E))
581	++j;	859	{
582		860	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
583	if (w->at <= heap [j]->at)	861	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		862	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		863	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		864	}
		865	else if (pos < E)
		866	{
		867	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		868	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		869	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		870	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		871	}
		872	else
584	break;	873	break;
585		874
		875	if (ANHE_at (he) <= minat)
		876	break;
		877
		878	heap [k] = *minpos;
		879	ev_active (ANHE_w (*minpos)) = k;
		880
		881	k = minpos - heap;
		882	}
		883
		884	heap [k] = he;
		885	ev_active (ANHE_w (he)) = k;
		886	}
		887
		888	#else /* 4HEAP */
		889
		890	#define HEAP0 1
		891	#define HPARENT(k) ((k) >> 1)
		892	#define UPHEAP_DONE(p,k) (!(p))
		893
		894	/* away from the root */
		895	void inline_speed
		896	downheap (ANHE *heap, int N, int k)
		897	{
		898	ANHE he = heap [k];
		899
		900	for (;;)
		901	{
		902	int c = k << 1;
		903
		904	if (c > N + HEAP0 - 1)
		905	break;
		906
		907	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		908	? 1 : 0;
		909
		910	if (ANHE_at (he) <= ANHE_at (heap [c]))
		911	break;
		912
586	heap [k] = heap [j];	913	heap [k] = heap [c];
587	((W)heap [k])->active = k + 1;	914	ev_active (ANHE_w (heap [k])) = k;
		915
588	k = j;	916	k = c;
589	}	917	}
590		918
591	heap [k] = w;	919	heap [k] = he;
592	((W)heap [k])->active = k + 1;	920	ev_active (ANHE_w (he)) = k;
593	}	921	}
		922	#endif
594		923
595	inline void	924	/* towards the root */
		925	void inline_speed
		926	upheap (ANHE *heap, int k)
		927	{
		928	ANHE he = heap [k];
		929
		930	for (;;)
		931	{
		932	int p = HPARENT (k);
		933
		934	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		935	break;
		936
		937	heap [k] = heap [p];
		938	ev_active (ANHE_w (heap [k])) = k;
		939	k = p;
		940	}
		941
		942	heap [k] = he;
		943	ev_active (ANHE_w (he)) = k;
		944	}
		945
		946	void inline_size
596	adjustheap (WT *heap, int N, int k)	947	adjustheap (ANHE *heap, int N, int k)
597	{	948	{
		949	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
598	upheap (heap, k);	950	upheap (heap, k);
		951	else
599	downheap (heap, N, k);	952	downheap (heap, N, k);
		953	}
		954
		955	/* rebuild the heap: this function is used only once and executed rarely */
		956	void inline_size
		957	reheap (ANHE *heap, int N)
		958	{
		959	int i;
		960
		961	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		962	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		963	for (i = 0; i < N; ++i)
		964	upheap (heap, i + HEAP0);
600	}	965	}
601		966
602	/*****************************************************************************/	967	/*****************************************************************************/
603		968
604	typedef struct	969	typedef struct
605	{	970	{
606	WL head;	971	WL head;
607	sig_atomic_t volatile gotsig;	972	EV_ATOMIC_T gotsig;
608	} ANSIG;	973	} ANSIG;
609		974
610	static ANSIG *signals;	975	static ANSIG *signals;
611	static int signalmax;	976	static int signalmax;
612		977
613	static int sigpipe [2];	978	static EV_ATOMIC_T gotsig;
614	static sig_atomic_t volatile gotsig;
615	static struct ev_io sigev;
616		979
617	static void	980	void inline_size
618	signals_init (ANSIG *base, int count)	981	signals_init (ANSIG *base, int count)
619	{	982	{
620	while (count--)	983	while (count--)
621	{	984	{
622	base->head = 0;	985	base->head = 0;
…		…
624		987
625	++base;	988	++base;
626	}	989	}
627	}	990	}
628		991
629	static void	992	/*****************************************************************************/
630	sighandler (int signum)
631	{
632	#if _WIN32
633	signal (signum, sighandler);
634	#endif
635		993
636	signals [signum - 1].gotsig = 1;	994	void inline_speed
637
638	if (!gotsig)
639	{
640	int old_errno = errno;
641	gotsig = 1;
642	write (sigpipe [1], &signum, 1);
643	errno = old_errno;
644	}
645	}
646
647	void
648	ev_feed_signal_event (EV_P_ int signum)
649	{
650	WL w;
651
652	#if EV_MULTIPLICITY
653	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
654	#endif
655
656	--signum;
657
658	if (signum < 0 || signum >= signalmax)
659	return;
660
661	signals [signum].gotsig = 0;
662
663	for (w = signals [signum].head; w; w = w->next)
664	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
665	}
666
667	static void
668	sigcb (EV_P_ struct ev_io *iow, int revents)
669	{
670	int signum;
671
672	read (sigpipe [0], &revents, 1);
673	gotsig = 0;
674
675	for (signum = signalmax; signum--; )
676	if (signals [signum].gotsig)
677	ev_feed_signal_event (EV_A_ signum + 1);
678	}
679
680	static void
681	fd_intern (int fd)	995	fd_intern (int fd)
682	{	996	{
683	#ifdef _WIN32	997	#ifdef _WIN32
684	int arg = 1;	998	unsigned long arg = 1;
685	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	999	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
686	#else	1000	#else
687	fcntl (fd, F_SETFD, FD_CLOEXEC);	1001	fcntl (fd, F_SETFD, FD_CLOEXEC);
688	fcntl (fd, F_SETFL, O_NONBLOCK);	1002	fcntl (fd, F_SETFL, O_NONBLOCK);
689	#endif	1003	#endif
690	}	1004	}
691		1005
		1006	static void noinline
		1007	evpipe_init (EV_P)
		1008	{
		1009	if (!ev_is_active (&pipeev))
		1010	{
		1011	#if EV_USE_EVENTFD
		1012	if ((evfd = eventfd (0, 0)) >= 0)
		1013	{
		1014	evpipe [0] = -1;
		1015	fd_intern (evfd);
		1016	ev_io_set (&pipeev, evfd, EV_READ);
		1017	}
		1018	else
		1019	#endif
		1020	{
		1021	while (pipe (evpipe))
		1022	syserr ("(libev) error creating signal/async pipe");
		1023
		1024	fd_intern (evpipe [0]);
		1025	fd_intern (evpipe [1]);
		1026	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1027	}
		1028
		1029	ev_io_start (EV_A_ &pipeev);
		1030	ev_unref (EV_A); /* watcher should not keep loop alive */
		1031	}
		1032	}
		1033
		1034	void inline_size
		1035	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1036	{
		1037	if (!*flag)
		1038	{
		1039	int old_errno = errno; /* save errno because write might clobber it */
		1040
		1041	*flag = 1;
		1042
		1043	#if EV_USE_EVENTFD
		1044	if (evfd >= 0)
		1045	{
		1046	uint64_t counter = 1;
		1047	write (evfd, &counter, sizeof (uint64_t));
		1048	}
		1049	else
		1050	#endif
		1051	write (evpipe [1], &old_errno, 1);
		1052
		1053	errno = old_errno;
		1054	}
		1055	}
		1056
692	static void	1057	static void
693	siginit (EV_P)	1058	pipecb (EV_P_ ev_io *iow, int revents)
694	{	1059	{
695	fd_intern (sigpipe [0]);	1060	#if EV_USE_EVENTFD
696	fd_intern (sigpipe [1]);	1061	if (evfd >= 0)
		1062	{
		1063	uint64_t counter;
		1064	read (evfd, &counter, sizeof (uint64_t));
		1065	}
		1066	else
		1067	#endif
		1068	{
		1069	char dummy;
		1070	read (evpipe [0], &dummy, 1);
		1071	}
697		1072
698	ev_io_set (&sigev, sigpipe [0], EV_READ);	1073	if (gotsig && ev_is_default_loop (EV_A))
699	ev_io_start (EV_A_ &sigev);	1074	{
700	ev_unref (EV_A); /* child watcher should not keep loop alive */	1075	int signum;
		1076	gotsig = 0;
		1077
		1078	for (signum = signalmax; signum--; )
		1079	if (signals [signum].gotsig)
		1080	ev_feed_signal_event (EV_A_ signum + 1);
		1081	}
		1082
		1083	#if EV_ASYNC_ENABLE
		1084	if (gotasync)
		1085	{
		1086	int i;
		1087	gotasync = 0;
		1088
		1089	for (i = asynccnt; i--; )
		1090	if (asyncs [i]->sent)
		1091	{
		1092	asyncs [i]->sent = 0;
		1093	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1094	}
		1095	}
		1096	#endif
701	}	1097	}
702		1098
703	/*****************************************************************************/	1099	/*****************************************************************************/
704		1100
705	static struct ev_child *childs [PID_HASHSIZE];	1101	static void
		1102	ev_sighandler (int signum)
		1103	{
		1104	#if EV_MULTIPLICITY
		1105	struct ev_loop *loop = &default_loop_struct;
		1106	#endif
		1107
		1108	#if _WIN32
		1109	signal (signum, ev_sighandler);
		1110	#endif
		1111
		1112	signals [signum - 1].gotsig = 1;
		1113	evpipe_write (EV_A_ &gotsig);
		1114	}
		1115
		1116	void noinline
		1117	ev_feed_signal_event (EV_P_ int signum)
		1118	{
		1119	WL w;
		1120
		1121	#if EV_MULTIPLICITY
		1122	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1123	#endif
		1124
		1125	--signum;
		1126
		1127	if (signum < 0 || signum >= signalmax)
		1128	return;
		1129
		1130	signals [signum].gotsig = 0;
		1131
		1132	for (w = signals [signum].head; w; w = w->next)
		1133	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1134	}
		1135
		1136	/*****************************************************************************/
		1137
		1138	static WL childs [EV_PID_HASHSIZE];
706		1139
707	#ifndef _WIN32	1140	#ifndef _WIN32
708		1141
709	static struct ev_signal childev;	1142	static ev_signal childev;
		1143
		1144	#ifndef WIFCONTINUED
		1145	# define WIFCONTINUED(status) 0
		1146	#endif
		1147
		1148	void inline_speed
		1149	child_reap (EV_P_ int chain, int pid, int status)
		1150	{
		1151	ev_child *w;
		1152	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1153
		1154	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1155	{
		1156	if ((w->pid == pid || !w->pid)
		1157	&& (!traced || (w->flags & 1)))
		1158	{
		1159	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1160	w->rpid = pid;
		1161	w->rstatus = status;
		1162	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1163	}
		1164	}
		1165	}
710		1166
711	#ifndef WCONTINUED	1167	#ifndef WCONTINUED
712	# define WCONTINUED 0	1168	# define WCONTINUED 0
713	#endif	1169	#endif
714		1170
715	static void	1171	static void
716	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
717	{
718	struct ev_child *w;
719
720	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
721	if (w->pid == pid || !w->pid)
722	{
723	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
724	w->rpid = pid;
725	w->rstatus = status;
726	ev_feed_event (EV_A_ (W)w, EV_CHILD);
727	}
728	}
729
730	static void
731	childcb (EV_P_ struct ev_signal *sw, int revents)	1172	childcb (EV_P_ ev_signal *sw, int revents)
732	{	1173	{
733	int pid, status;	1174	int pid, status;
734		1175
		1176	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
735	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1177	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
736	{	1178	if (!WCONTINUED
		1179	|| errno != EINVAL
		1180	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1181	return;
		1182
737	/* make sure we are called again until all childs have been reaped */	1183	/* make sure we are called again until all children have been reaped */
		1184	/* we need to do it this way so that the callback gets called before we continue */
738	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1185	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
739		1186
740	child_reap (EV_A_ sw, pid, pid, status);	1187	child_reap (EV_A_ pid, pid, status);
		1188	if (EV_PID_HASHSIZE > 1)
741	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1189	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
742	}
743	}	1190	}
744		1191
745	#endif	1192	#endif
746		1193
747	/*****************************************************************************/	1194	/*****************************************************************************/
…		…
773	{	1220	{
774	return EV_VERSION_MINOR;	1221	return EV_VERSION_MINOR;
775	}	1222	}
776		1223
777	/* return true if we are running with elevated privileges and should ignore env variables */	1224	/* return true if we are running with elevated privileges and should ignore env variables */
778	static int	1225	int inline_size
779	enable_secure (void)	1226	enable_secure (void)
780	{	1227	{
781	#ifdef _WIN32	1228	#ifdef _WIN32
782	return 0;	1229	return 0;
783	#else	1230	#else
…		…
785	|| getgid () != getegid ();	1232	|| getgid () != getegid ();
786	#endif	1233	#endif
787	}	1234	}
788		1235
789	unsigned int	1236	unsigned int
790	ev_method (EV_P)	1237	ev_supported_backends (void)
791	{	1238	{
792	return method;	1239	unsigned int flags = 0;
793	}
794		1240
795	static void	1241	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1242	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1243	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1244	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1245	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1246
		1247	return flags;
		1248	}
		1249
		1250	unsigned int
		1251	ev_recommended_backends (void)
		1252	{
		1253	unsigned int flags = ev_supported_backends ();
		1254
		1255	#ifndef __NetBSD__
		1256	/* kqueue is borked on everything but netbsd apparently */
		1257	/* it usually doesn't work correctly on anything but sockets and pipes */
		1258	flags &= ~EVBACKEND_KQUEUE;
		1259	#endif
		1260	#ifdef __APPLE__
		1261	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1262	flags &= ~EVBACKEND_POLL;
		1263	#endif
		1264
		1265	return flags;
		1266	}
		1267
		1268	unsigned int
		1269	ev_embeddable_backends (void)
		1270	{
		1271	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1272
		1273	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1274	/* please fix it and tell me how to detect the fix */
		1275	flags &= ~EVBACKEND_EPOLL;
		1276
		1277	return flags;
		1278	}
		1279
		1280	unsigned int
		1281	ev_backend (EV_P)
		1282	{
		1283	return backend;
		1284	}
		1285
		1286	unsigned int
		1287	ev_loop_count (EV_P)
		1288	{
		1289	return loop_count;
		1290	}
		1291
		1292	void
		1293	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1294	{
		1295	io_blocktime = interval;
		1296	}
		1297
		1298	void
		1299	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1300	{
		1301	timeout_blocktime = interval;
		1302	}
		1303
		1304	static void noinline
796	loop_init (EV_P_ unsigned int flags)	1305	loop_init (EV_P_ unsigned int flags)
797	{	1306	{
798	if (!method)	1307	if (!backend)
799	{	1308	{
800	#if EV_USE_MONOTONIC	1309	#if EV_USE_MONOTONIC
801	{	1310	{
802	struct timespec ts;	1311	struct timespec ts;
803	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1312	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
804	have_monotonic = 1;	1313	have_monotonic = 1;
805	}	1314	}
806	#endif	1315	#endif
807		1316
808	ev_rt_now = ev_time ();	1317	ev_rt_now = ev_time ();
809	mn_now = get_clock ();	1318	mn_now = get_clock ();
810	now_floor = mn_now;	1319	now_floor = mn_now;
811	rtmn_diff = ev_rt_now - mn_now;	1320	rtmn_diff = ev_rt_now - mn_now;
812		1321
813	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))	1322	io_blocktime = 0.;
		1323	timeout_blocktime = 0.;
		1324	backend = 0;
		1325	backend_fd = -1;
		1326	gotasync = 0;
		1327	#if EV_USE_INOTIFY
		1328	fs_fd = -2;
		1329	#endif
		1330
		1331	/* pid check not overridable via env */
		1332	#ifndef _WIN32
		1333	if (flags & EVFLAG_FORKCHECK)
		1334	curpid = getpid ();
		1335	#endif
		1336
		1337	if (!(flags & EVFLAG_NOENV)
		1338	&& !enable_secure ()
		1339	&& getenv ("LIBEV_FLAGS"))
814	flags = atoi (getenv ("LIBEV_FLAGS"));	1340	flags = atoi (getenv ("LIBEV_FLAGS"));
815		1341
816	if (!(flags & 0x0000ffff))	1342	if (!(flags & 0x0000ffffU))
817	flags |= 0x0000ffff;	1343	flags |= ev_recommended_backends ();
818		1344
819	method = 0;
820	#if EV_USE_PORT	1345	#if EV_USE_PORT
821	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);	1346	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
822	#endif	1347	#endif
823	#if EV_USE_KQUEUE	1348	#if EV_USE_KQUEUE
824	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);	1349	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
825	#endif	1350	#endif
826	#if EV_USE_EPOLL	1351	#if EV_USE_EPOLL
827	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);	1352	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
828	#endif	1353	#endif
829	#if EV_USE_POLL	1354	#if EV_USE_POLL
830	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);	1355	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
831	#endif	1356	#endif
832	#if EV_USE_SELECT	1357	#if EV_USE_SELECT
833	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);	1358	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
834	#endif	1359	#endif
835		1360
836	ev_init (&sigev, sigcb);	1361	ev_init (&pipeev, pipecb);
837	ev_set_priority (&sigev, EV_MAXPRI);	1362	ev_set_priority (&pipeev, EV_MAXPRI);
838	}	1363	}
839	}	1364	}
840		1365
841	static void	1366	static void noinline
842	loop_destroy (EV_P)	1367	loop_destroy (EV_P)
843	{	1368	{
844	int i;	1369	int i;
845		1370
		1371	if (ev_is_active (&pipeev))
		1372	{
		1373	ev_ref (EV_A); /* signal watcher */
		1374	ev_io_stop (EV_A_ &pipeev);
		1375
		1376	#if EV_USE_EVENTFD
		1377	if (evfd >= 0)
		1378	close (evfd);
		1379	#endif
		1380
		1381	if (evpipe [0] >= 0)
		1382	{
		1383	close (evpipe [0]);
		1384	close (evpipe [1]);
		1385	}
		1386	}
		1387
		1388	#if EV_USE_INOTIFY
		1389	if (fs_fd >= 0)
		1390	close (fs_fd);
		1391	#endif
		1392
		1393	if (backend_fd >= 0)
		1394	close (backend_fd);
		1395
846	#if EV_USE_PORT	1396	#if EV_USE_PORT
847	if (method == EVMETHOD_PORT ) port_destroy (EV_A);	1397	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
848	#endif	1398	#endif
849	#if EV_USE_KQUEUE	1399	#if EV_USE_KQUEUE
850	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1400	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
851	#endif	1401	#endif
852	#if EV_USE_EPOLL	1402	#if EV_USE_EPOLL
853	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1403	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
854	#endif	1404	#endif
855	#if EV_USE_POLL	1405	#if EV_USE_POLL
856	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1406	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
857	#endif	1407	#endif
858	#if EV_USE_SELECT	1408	#if EV_USE_SELECT
859	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1409	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
860	#endif	1410	#endif
861		1411
862	for (i = NUMPRI; i--; )	1412	for (i = NUMPRI; i--; )
		1413	{
863	array_free (pending, [i]);	1414	array_free (pending, [i]);
		1415	#if EV_IDLE_ENABLE
		1416	array_free (idle, [i]);
		1417	#endif
		1418	}
		1419
		1420	ev_free (anfds); anfdmax = 0;
864		1421
865	/* have to use the microsoft-never-gets-it-right macro */	1422	/* have to use the microsoft-never-gets-it-right macro */
866	array_free (fdchange, EMPTY0);	1423	array_free (fdchange, EMPTY);
867	array_free (timer, EMPTY0);	1424	array_free (timer, EMPTY);
868	#if EV_PERIODICS	1425	#if EV_PERIODIC_ENABLE
869	array_free (periodic, EMPTY0);	1426	array_free (periodic, EMPTY);
870	#endif	1427	#endif
		1428	#if EV_FORK_ENABLE
871	array_free (idle, EMPTY0);	1429	array_free (fork, EMPTY);
		1430	#endif
872	array_free (prepare, EMPTY0);	1431	array_free (prepare, EMPTY);
873	array_free (check, EMPTY0);	1432	array_free (check, EMPTY);
		1433	#if EV_ASYNC_ENABLE
		1434	array_free (async, EMPTY);
		1435	#endif
874		1436
875	method = 0;	1437	backend = 0;
876	}	1438	}
877		1439
878	static void	1440	#if EV_USE_INOTIFY
		1441	void inline_size infy_fork (EV_P);
		1442	#endif
		1443
		1444	void inline_size
879	loop_fork (EV_P)	1445	loop_fork (EV_P)
880	{	1446	{
881	#if EV_USE_PORT	1447	#if EV_USE_PORT
882	if (method == EVMETHOD_PORT ) port_fork (EV_A);	1448	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
883	#endif	1449	#endif
884	#if EV_USE_KQUEUE	1450	#if EV_USE_KQUEUE
885	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1451	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
886	#endif	1452	#endif
887	#if EV_USE_EPOLL	1453	#if EV_USE_EPOLL
888	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1454	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
889	#endif	1455	#endif
		1456	#if EV_USE_INOTIFY
		1457	infy_fork (EV_A);
		1458	#endif
890		1459
891	if (ev_is_active (&sigev))	1460	if (ev_is_active (&pipeev))
892	{	1461	{
893	/* default loop */	1462	/* this "locks" the handlers against writing to the pipe */
		1463	/* while we modify the fd vars */
		1464	gotsig = 1;
		1465	#if EV_ASYNC_ENABLE
		1466	gotasync = 1;
		1467	#endif
894		1468
895	ev_ref (EV_A);	1469	ev_ref (EV_A);
896	ev_io_stop (EV_A_ &sigev);	1470	ev_io_stop (EV_A_ &pipeev);
		1471
		1472	#if EV_USE_EVENTFD
		1473	if (evfd >= 0)
		1474	close (evfd);
		1475	#endif
		1476
		1477	if (evpipe [0] >= 0)
		1478	{
897	close (sigpipe [0]);	1479	close (evpipe [0]);
898	close (sigpipe [1]);	1480	close (evpipe [1]);
		1481	}
899		1482
900	while (pipe (sigpipe))
901	syserr ("(libev) error creating pipe");
902
903	siginit (EV_A);	1483	evpipe_init (EV_A);
		1484	/* now iterate over everything, in case we missed something */
		1485	pipecb (EV_A_ &pipeev, EV_READ);
904	}	1486	}
905		1487
906	postfork = 0;	1488	postfork = 0;
907	}	1489	}
908		1490
909	#if EV_MULTIPLICITY	1491	#if EV_MULTIPLICITY
		1492
910	struct ev_loop *	1493	struct ev_loop *
911	ev_loop_new (unsigned int flags)	1494	ev_loop_new (unsigned int flags)
912	{	1495	{
913	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1496	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
914		1497
915	memset (loop, 0, sizeof (struct ev_loop));	1498	memset (loop, 0, sizeof (struct ev_loop));
916		1499
917	loop_init (EV_A_ flags);	1500	loop_init (EV_A_ flags);
918		1501
919	if (ev_method (EV_A))	1502	if (ev_backend (EV_A))
920	return loop;	1503	return loop;
921		1504
922	return 0;	1505	return 0;
923	}	1506	}
924		1507
…		…
930	}	1513	}
931		1514
932	void	1515	void
933	ev_loop_fork (EV_P)	1516	ev_loop_fork (EV_P)
934	{	1517	{
935	postfork = 1;	1518	postfork = 1; /* must be in line with ev_default_fork */
936	}	1519	}
937		1520
		1521	#if EV_VERIFY
		1522	static void noinline
		1523	verify_watcher (EV_P_ W w)
		1524	{
		1525	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1526
		1527	if (w->pending)
		1528	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1529	}
		1530
		1531	static void noinline
		1532	verify_heap (EV_P_ ANHE *heap, int N)
		1533	{
		1534	int i;
		1535
		1536	for (i = HEAP0; i < N + HEAP0; ++i)
		1537	{
		1538	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1539	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1540	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1541
		1542	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1543	}
		1544	}
		1545
		1546	static void noinline
		1547	array_verify (EV_P_ W *ws, int cnt)
		1548	{
		1549	while (cnt--)
		1550	{
		1551	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1552	verify_watcher (EV_A_ ws [cnt]);
		1553	}
		1554	}
		1555	#endif
		1556
		1557	void
		1558	ev_loop_verify (EV_P)
		1559	{
		1560	#if EV_VERIFY
		1561	int i;
		1562	WL w;
		1563
		1564	assert (activecnt >= -1);
		1565
		1566	assert (fdchangemax >= fdchangecnt);
		1567	for (i = 0; i < fdchangecnt; ++i)
		1568	assert (("negative fd in fdchanges", fdchanges [i] >= 0));
		1569
		1570	assert (anfdmax >= 0);
		1571	for (i = 0; i < anfdmax; ++i)
		1572	for (w = anfds [i].head; w; w = w->next)
		1573	{
		1574	verify_watcher (EV_A_ (W)w);
		1575	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
		1576	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1577	}
		1578
		1579	assert (timermax >= timercnt);
		1580	verify_heap (EV_A_ timers, timercnt);
		1581
		1582	#if EV_PERIODIC_ENABLE
		1583	assert (periodicmax >= periodiccnt);
		1584	verify_heap (EV_A_ periodics, periodiccnt);
		1585	#endif
		1586
		1587	for (i = NUMPRI; i--; )
		1588	{
		1589	assert (pendingmax [i] >= pendingcnt [i]);
		1590	#if EV_IDLE_ENABLE
		1591	assert (idleall >= 0);
		1592	assert (idlemax [i] >= idlecnt [i]);
		1593	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1594	#endif
		1595	}
		1596
		1597	#if EV_FORK_ENABLE
		1598	assert (forkmax >= forkcnt);
		1599	array_verify (EV_A_ (W *)forks, forkcnt);
		1600	#endif
		1601
		1602	#if EV_ASYNC_ENABLE
		1603	assert (asyncmax >= asynccnt);
		1604	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1605	#endif
		1606
		1607	assert (preparemax >= preparecnt);
		1608	array_verify (EV_A_ (W *)prepares, preparecnt);
		1609
		1610	assert (checkmax >= checkcnt);
		1611	array_verify (EV_A_ (W *)checks, checkcnt);
		1612
		1613	# if 0
		1614	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1615	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
938	#endif	1616	# endif
		1617	#endif
		1618	}
		1619
		1620	#endif /* multiplicity */
939		1621
940	#if EV_MULTIPLICITY	1622	#if EV_MULTIPLICITY
941	struct ev_loop *	1623	struct ev_loop *
942	ev_default_loop_init (unsigned int flags)	1624	ev_default_loop_init (unsigned int flags)
943	#else	1625	#else
944	int	1626	int
945	ev_default_loop (unsigned int flags)	1627	ev_default_loop (unsigned int flags)
946	#endif	1628	#endif
947	{	1629	{
948	if (sigpipe [0] == sigpipe [1])
949	if (pipe (sigpipe))
950	return 0;
951
952	if (!ev_default_loop_ptr)	1630	if (!ev_default_loop_ptr)
953	{	1631	{
954	#if EV_MULTIPLICITY	1632	#if EV_MULTIPLICITY
955	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1633	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
956	#else	1634	#else
957	ev_default_loop_ptr = 1;	1635	ev_default_loop_ptr = 1;
958	#endif	1636	#endif
959		1637
960	loop_init (EV_A_ flags);	1638	loop_init (EV_A_ flags);
961		1639
962	if (ev_method (EV_A))	1640	if (ev_backend (EV_A))
963	{	1641	{
964	siginit (EV_A);
965
966	#ifndef _WIN32	1642	#ifndef _WIN32
967	ev_signal_init (&childev, childcb, SIGCHLD);	1643	ev_signal_init (&childev, childcb, SIGCHLD);
968	ev_set_priority (&childev, EV_MAXPRI);	1644	ev_set_priority (&childev, EV_MAXPRI);
969	ev_signal_start (EV_A_ &childev);	1645	ev_signal_start (EV_A_ &childev);
970	ev_unref (EV_A); /* child watcher should not keep loop alive */	1646	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
987	#ifndef _WIN32	1663	#ifndef _WIN32
988	ev_ref (EV_A); /* child watcher */	1664	ev_ref (EV_A); /* child watcher */
989	ev_signal_stop (EV_A_ &childev);	1665	ev_signal_stop (EV_A_ &childev);
990	#endif	1666	#endif
991		1667
992	ev_ref (EV_A); /* signal watcher */
993	ev_io_stop (EV_A_ &sigev);
994
995	close (sigpipe [0]); sigpipe [0] = 0;
996	close (sigpipe [1]); sigpipe [1] = 0;
997
998	loop_destroy (EV_A);	1668	loop_destroy (EV_A);
999	}	1669	}
1000		1670
1001	void	1671	void
1002	ev_default_fork (void)	1672	ev_default_fork (void)
1003	{	1673	{
1004	#if EV_MULTIPLICITY	1674	#if EV_MULTIPLICITY
1005	struct ev_loop *loop = ev_default_loop_ptr;	1675	struct ev_loop *loop = ev_default_loop_ptr;
1006	#endif	1676	#endif
1007		1677
1008	if (method)	1678	if (backend)
1009	postfork = 1;	1679	postfork = 1; /* must be in line with ev_loop_fork */
1010	}	1680	}
1011		1681
1012	/*****************************************************************************/	1682	/*****************************************************************************/
1013		1683
1014	static int	1684	void
1015	any_pending (EV_P)	1685	ev_invoke (EV_P_ void *w, int revents)
1016	{	1686	{
1017	int pri;	1687	EV_CB_INVOKE ((W)w, revents);
1018
1019	for (pri = NUMPRI; pri--; )
1020	if (pendingcnt [pri])
1021	return 1;
1022
1023	return 0;
1024	}	1688	}
1025		1689
1026	inline void	1690	void inline_speed
1027	call_pending (EV_P)	1691	call_pending (EV_P)
1028	{	1692	{
1029	int pri;	1693	int pri;
1030		1694
1031	for (pri = NUMPRI; pri--; )	1695	for (pri = NUMPRI; pri--; )
…		…
1033	{	1697	{
1034	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1698	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1035		1699
1036	if (expect_true (p->w))	1700	if (expect_true (p->w))
1037	{	1701	{
		1702	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1703
1038	p->w->pending = 0;	1704	p->w->pending = 0;
1039	EV_CB_INVOKE (p->w, p->events);	1705	EV_CB_INVOKE (p->w, p->events);
		1706	EV_FREQUENT_CHECK;
1040	}	1707	}
1041	}	1708	}
1042	}	1709	}
1043		1710
1044	inline void	1711	#if EV_IDLE_ENABLE
		1712	void inline_size
		1713	idle_reify (EV_P)
		1714	{
		1715	if (expect_false (idleall))
		1716	{
		1717	int pri;
		1718
		1719	for (pri = NUMPRI; pri--; )
		1720	{
		1721	if (pendingcnt [pri])
		1722	break;
		1723
		1724	if (idlecnt [pri])
		1725	{
		1726	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1727	break;
		1728	}
		1729	}
		1730	}
		1731	}
		1732	#endif
		1733
		1734	void inline_size
1045	timers_reify (EV_P)	1735	timers_reify (EV_P)
1046	{	1736	{
		1737	EV_FREQUENT_CHECK;
		1738
1047	while (timercnt && ((WT)timers [0])->at <= mn_now)	1739	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1048	{	1740	{
1049	struct ev_timer *w = timers [0];	1741	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1050		1742
1051	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1743	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1052		1744
1053	/* first reschedule or stop timer */	1745	/* first reschedule or stop timer */
1054	if (w->repeat)	1746	if (w->repeat)
1055	{	1747	{
		1748	ev_at (w) += w->repeat;
		1749	if (ev_at (w) < mn_now)
		1750	ev_at (w) = mn_now;
		1751
1056	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1752	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1057		1753
1058	((WT)w)->at += w->repeat;	1754	ANHE_at_cache (timers [HEAP0]);
1059	if (((WT)w)->at < mn_now)
1060	((WT)w)->at = mn_now;
1061
1062	downheap ((WT *)timers, timercnt, 0);	1755	downheap (timers, timercnt, HEAP0);
1063	}	1756	}
1064	else	1757	else
1065	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1758	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1066		1759
		1760	EV_FREQUENT_CHECK;
1067	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1761	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1068	}	1762	}
1069	}	1763	}
1070		1764
1071	#if EV_PERIODICS	1765	#if EV_PERIODIC_ENABLE
1072	inline void	1766	void inline_size
1073	periodics_reify (EV_P)	1767	periodics_reify (EV_P)
1074	{	1768	{
		1769	EV_FREQUENT_CHECK;
		1770
1075	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1771	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1076	{	1772	{
1077	struct ev_periodic *w = periodics [0];	1773	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1078		1774
1079	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1775	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1080		1776
1081	/* first reschedule or stop timer */	1777	/* first reschedule or stop timer */
1082	if (w->reschedule_cb)	1778	if (w->reschedule_cb)
1083	{	1779	{
1084	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1780	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1781
1085	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1782	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1783
		1784	ANHE_at_cache (periodics [HEAP0]);
1086	downheap ((WT *)periodics, periodiccnt, 0);	1785	downheap (periodics, periodiccnt, HEAP0);
1087	}	1786	}
1088	else if (w->interval)	1787	else if (w->interval)
1089	{	1788	{
1090	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1789	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1091	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1790	/* if next trigger time is not sufficiently in the future, put it there */
		1791	/* this might happen because of floating point inexactness */
		1792	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1793	{
		1794	ev_at (w) += w->interval;
		1795
		1796	/* if interval is unreasonably low we might still have a time in the past */
		1797	/* so correct this. this will make the periodic very inexact, but the user */
		1798	/* has effectively asked to get triggered more often than possible */
		1799	if (ev_at (w) < ev_rt_now)
		1800	ev_at (w) = ev_rt_now;
		1801	}
		1802
		1803	ANHE_at_cache (periodics [HEAP0]);
1092	downheap ((WT *)periodics, periodiccnt, 0);	1804	downheap (periodics, periodiccnt, HEAP0);
1093	}	1805	}
1094	else	1806	else
1095	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1807	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1096		1808
		1809	EV_FREQUENT_CHECK;
1097	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1810	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1098	}	1811	}
1099	}	1812	}
1100		1813
1101	static void	1814	static void noinline
1102	periodics_reschedule (EV_P)	1815	periodics_reschedule (EV_P)
1103	{	1816	{
1104	int i;	1817	int i;
1105		1818
1106	/* adjust periodics after time jump */	1819	/* adjust periodics after time jump */
1107	for (i = 0; i < periodiccnt; ++i)	1820	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1108	{	1821	{
1109	struct ev_periodic *w = periodics [i];	1822	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1110		1823
1111	if (w->reschedule_cb)	1824	if (w->reschedule_cb)
1112	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1825	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1113	else if (w->interval)	1826	else if (w->interval)
1114	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1827	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1828
		1829	ANHE_at_cache (periodics [i]);
		1830	}
		1831
		1832	reheap (periodics, periodiccnt);
		1833	}
		1834	#endif
		1835
		1836	void inline_speed
		1837	time_update (EV_P_ ev_tstamp max_block)
		1838	{
		1839	int i;
		1840
		1841	#if EV_USE_MONOTONIC
		1842	if (expect_true (have_monotonic))
1115	}	1843	{
		1844	ev_tstamp odiff = rtmn_diff;
1116		1845
1117	/* now rebuild the heap */
1118	for (i = periodiccnt >> 1; i--; )
1119	downheap ((WT *)periodics, periodiccnt, i);
1120	}
1121	#endif
1122
1123	inline int
1124	time_update_monotonic (EV_P)
1125	{
1126	mn_now = get_clock ();	1846	mn_now = get_clock ();
1127		1847
		1848	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1849	/* interpolate in the meantime */
1128	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1850	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1129	{	1851	{
1130	ev_rt_now = rtmn_diff + mn_now;	1852	ev_rt_now = rtmn_diff + mn_now;
1131	return 0;	1853	return;
1132	}	1854	}
1133	else	1855
1134	{
1135	now_floor = mn_now;	1856	now_floor = mn_now;
1136	ev_rt_now = ev_time ();	1857	ev_rt_now = ev_time ();
1137	return 1;
1138	}
1139	}
1140		1858
1141	inline void	1859	/* loop a few times, before making important decisions.
1142	time_update (EV_P)	1860	* on the choice of "4": one iteration isn't enough,
1143	{	1861	* in case we get preempted during the calls to
1144	int i;	1862	* ev_time and get_clock. a second call is almost guaranteed
1145		1863	* to succeed in that case, though. and looping a few more times
1146	#if EV_USE_MONOTONIC	1864	* doesn't hurt either as we only do this on time-jumps or
1147	if (expect_true (have_monotonic))	1865	* in the unlikely event of having been preempted here.
1148	{	1866	*/
1149	if (time_update_monotonic (EV_A))	1867	for (i = 4; --i; )
1150	{	1868	{
1151	ev_tstamp odiff = rtmn_diff;	1869	rtmn_diff = ev_rt_now - mn_now;
1152		1870
1153	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1871	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1872	return; /* all is well */
		1873
		1874	ev_rt_now = ev_time ();
		1875	mn_now = get_clock ();
		1876	now_floor = mn_now;
		1877	}
		1878
		1879	# if EV_PERIODIC_ENABLE
		1880	periodics_reschedule (EV_A);
		1881	# endif
		1882	/* no timer adjustment, as the monotonic clock doesn't jump */
		1883	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1884	}
		1885	else
		1886	#endif
		1887	{
		1888	ev_rt_now = ev_time ();
		1889
		1890	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1891	{
		1892	#if EV_PERIODIC_ENABLE
		1893	periodics_reschedule (EV_A);
		1894	#endif
		1895	/* adjust timers. this is easy, as the offset is the same for all of them */
		1896	for (i = 0; i < timercnt; ++i)
1154	{	1897	{
1155	rtmn_diff = ev_rt_now - mn_now;	1898	ANHE *he = timers + i + HEAP0;
1156		1899	ANHE_w (*he)->at += ev_rt_now - mn_now;
1157	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1900	ANHE_at_cache (*he);
1158	return; /* all is well */
1159
1160	ev_rt_now = ev_time ();
1161	mn_now = get_clock ();
1162	now_floor = mn_now;
1163	}	1901	}
1164
1165	# if EV_PERIODICS
1166	periodics_reschedule (EV_A);
1167	# endif
1168	/* no timer adjustment, as the monotonic clock doesn't jump */
1169	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1170	}	1902	}
1171	}
1172	else
1173	#endif
1174	{
1175	ev_rt_now = ev_time ();
1176
1177	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1178	{
1179	#if EV_PERIODICS
1180	periodics_reschedule (EV_A);
1181	#endif
1182
1183	/* adjust timers. this is easy, as the offset is the same for all */
1184	for (i = 0; i < timercnt; ++i)
1185	((WT)timers [i])->at += ev_rt_now - mn_now;
1186	}
1187		1903
1188	mn_now = ev_rt_now;	1904	mn_now = ev_rt_now;
1189	}	1905	}
1190	}	1906	}
1191		1907
…		…
1199	ev_unref (EV_P)	1915	ev_unref (EV_P)
1200	{	1916	{
1201	--activecnt;	1917	--activecnt;
1202	}	1918	}
1203		1919
		1920	void
		1921	ev_now_update (EV_P)
		1922	{
		1923	time_update (EV_A_ 1e100);
		1924	}
		1925
1204	static int loop_done;	1926	static int loop_done;
1205		1927
1206	void	1928	void
1207	ev_loop (EV_P_ int flags)	1929	ev_loop (EV_P_ int flags)
1208	{	1930	{
1209	double block;	1931	loop_done = EVUNLOOP_CANCEL;
1210	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1211		1932
1212	while (activecnt)	1933	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1934
		1935	do
1213	{	1936	{
		1937	#if EV_VERIFY >= 2
		1938	ev_loop_verify (EV_A);
		1939	#endif
		1940
		1941	#ifndef _WIN32
		1942	if (expect_false (curpid)) /* penalise the forking check even more */
		1943	if (expect_false (getpid () != curpid))
		1944	{
		1945	curpid = getpid ();
		1946	postfork = 1;
		1947	}
		1948	#endif
		1949
		1950	#if EV_FORK_ENABLE
		1951	/* we might have forked, so queue fork handlers */
		1952	if (expect_false (postfork))
		1953	if (forkcnt)
		1954	{
		1955	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1956	call_pending (EV_A);
		1957	}
		1958	#endif
		1959
1214	/* queue check watchers (and execute them) */	1960	/* queue prepare watchers (and execute them) */
1215	if (expect_false (preparecnt))	1961	if (expect_false (preparecnt))
1216	{	1962	{
1217	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1963	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1218	call_pending (EV_A);	1964	call_pending (EV_A);
1219	}	1965	}
1220		1966
		1967	if (expect_false (!activecnt))
		1968	break;
		1969
1221	/* we might have forked, so reify kernel state if necessary */	1970	/* we might have forked, so reify kernel state if necessary */
1222	if (expect_false (postfork))	1971	if (expect_false (postfork))
1223	loop_fork (EV_A);	1972	loop_fork (EV_A);
1224		1973
1225	/* update fd-related kernel structures */	1974	/* update fd-related kernel structures */
1226	fd_reify (EV_A);	1975	fd_reify (EV_A);
1227		1976
1228	/* calculate blocking time */	1977	/* calculate blocking time */
		1978	{
		1979	ev_tstamp waittime = 0.;
		1980	ev_tstamp sleeptime = 0.;
1229		1981
1230	/* we only need this for !monotonic clock or timers, but as we basically	1982	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1231	always have timers, we just calculate it always */
1232	#if EV_USE_MONOTONIC
1233	if (expect_true (have_monotonic))
1234	time_update_monotonic (EV_A);
1235	else
1236	#endif
1237	{	1983	{
1238	ev_rt_now = ev_time ();	1984	/* update time to cancel out callback processing overhead */
1239	mn_now = ev_rt_now;	1985	time_update (EV_A_ 1e100);
1240	}
1241		1986
1242	if (flags & EVLOOP_NONBLOCK || idlecnt)
1243	block = 0.;
1244	else
1245	{
1246	block = MAX_BLOCKTIME;	1987	waittime = MAX_BLOCKTIME;
1247		1988
1248	if (timercnt)	1989	if (timercnt)
1249	{	1990	{
1250	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1991	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1251	if (block > to) block = to;	1992	if (waittime > to) waittime = to;
1252	}	1993	}
1253		1994
1254	#if EV_PERIODICS	1995	#if EV_PERIODIC_ENABLE
1255	if (periodiccnt)	1996	if (periodiccnt)
1256	{	1997	{
1257	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	1998	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1258	if (block > to) block = to;	1999	if (waittime > to) waittime = to;
1259	}	2000	}
1260	#endif	2001	#endif
1261		2002
1262	if (expect_false (block < 0.)) block = 0.;	2003	if (expect_false (waittime < timeout_blocktime))
		2004	waittime = timeout_blocktime;
		2005
		2006	sleeptime = waittime - backend_fudge;
		2007
		2008	if (expect_true (sleeptime > io_blocktime))
		2009	sleeptime = io_blocktime;
		2010
		2011	if (sleeptime)
		2012	{
		2013	ev_sleep (sleeptime);
		2014	waittime -= sleeptime;
		2015	}
1263	}	2016	}
1264		2017
1265	method_poll (EV_A_ block);	2018	++loop_count;
		2019	backend_poll (EV_A_ waittime);
1266		2020
1267	/* update ev_rt_now, do magic */	2021	/* update ev_rt_now, do magic */
1268	time_update (EV_A);	2022	time_update (EV_A_ waittime + sleeptime);
		2023	}
1269		2024
1270	/* queue pending timers and reschedule them */	2025	/* queue pending timers and reschedule them */
1271	timers_reify (EV_A); /* relative timers called last */	2026	timers_reify (EV_A); /* relative timers called last */
1272	#if EV_PERIODICS	2027	#if EV_PERIODIC_ENABLE
1273	periodics_reify (EV_A); /* absolute timers called first */	2028	periodics_reify (EV_A); /* absolute timers called first */
1274	#endif	2029	#endif
1275		2030
		2031	#if EV_IDLE_ENABLE
1276	/* queue idle watchers unless io or timers are pending */	2032	/* queue idle watchers unless other events are pending */
1277	if (idlecnt && !any_pending (EV_A))	2033	idle_reify (EV_A);
1278	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2034	#endif
1279		2035
1280	/* queue check watchers, to be executed first */	2036	/* queue check watchers, to be executed first */
1281	if (expect_false (checkcnt))	2037	if (expect_false (checkcnt))
1282	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2038	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1283		2039
1284	call_pending (EV_A);	2040	call_pending (EV_A);
1285
1286	if (expect_false (loop_done))
1287	break;
1288	}	2041	}
		2042	while (expect_true (
		2043	activecnt
		2044	&& !loop_done
		2045	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		2046	));
1289		2047
1290	if (loop_done != 2)	2048	if (loop_done == EVUNLOOP_ONE)
1291	loop_done = 0;	2049	loop_done = EVUNLOOP_CANCEL;
1292	}	2050	}
1293		2051
1294	void	2052	void
1295	ev_unloop (EV_P_ int how)	2053	ev_unloop (EV_P_ int how)
1296	{	2054	{
1297	loop_done = how;	2055	loop_done = how;
1298	}	2056	}
1299		2057
1300	/*****************************************************************************/	2058	/*****************************************************************************/
1301		2059
1302	inline void	2060	void inline_size
1303	wlist_add (WL *head, WL elem)	2061	wlist_add (WL *head, WL elem)
1304	{	2062	{
1305	elem->next = *head;	2063	elem->next = *head;
1306	*head = elem;	2064	*head = elem;
1307	}	2065	}
1308		2066
1309	inline void	2067	void inline_size
1310	wlist_del (WL *head, WL elem)	2068	wlist_del (WL *head, WL elem)
1311	{	2069	{
1312	while (*head)	2070	while (*head)
1313	{	2071	{
1314	if (*head == elem)	2072	if (*head == elem)
…		…
1319		2077
1320	head = &(*head)->next;	2078	head = &(*head)->next;
1321	}	2079	}
1322	}	2080	}
1323		2081
1324	inline void	2082	void inline_speed
1325	ev_clear_pending (EV_P_ W w)	2083	clear_pending (EV_P_ W w)
1326	{	2084	{
1327	if (w->pending)	2085	if (w->pending)
1328	{	2086	{
1329	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2087	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1330	w->pending = 0;	2088	w->pending = 0;
1331	}	2089	}
1332	}	2090	}
1333		2091
1334	inline void	2092	int
		2093	ev_clear_pending (EV_P_ void *w)
		2094	{
		2095	W w_ = (W)w;
		2096	int pending = w_->pending;
		2097
		2098	if (expect_true (pending))
		2099	{
		2100	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2101	w_->pending = 0;
		2102	p->w = 0;
		2103	return p->events;
		2104	}
		2105	else
		2106	return 0;
		2107	}
		2108
		2109	void inline_size
		2110	pri_adjust (EV_P_ W w)
		2111	{
		2112	int pri = w->priority;
		2113	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2114	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2115	w->priority = pri;
		2116	}
		2117
		2118	void inline_speed
1335	ev_start (EV_P_ W w, int active)	2119	ev_start (EV_P_ W w, int active)
1336	{	2120	{
1337	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2121	pri_adjust (EV_A_ w);
1338	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1339
1340	w->active = active;	2122	w->active = active;
1341	ev_ref (EV_A);	2123	ev_ref (EV_A);
1342	}	2124	}
1343		2125
1344	inline void	2126	void inline_size
1345	ev_stop (EV_P_ W w)	2127	ev_stop (EV_P_ W w)
1346	{	2128	{
1347	ev_unref (EV_A);	2129	ev_unref (EV_A);
1348	w->active = 0;	2130	w->active = 0;
1349	}	2131	}
1350		2132
1351	/*****************************************************************************/	2133	/*****************************************************************************/
1352		2134
1353	void	2135	void noinline
1354	ev_io_start (EV_P_ struct ev_io *w)	2136	ev_io_start (EV_P_ ev_io *w)
1355	{	2137	{
1356	int fd = w->fd;	2138	int fd = w->fd;
1357		2139
1358	if (expect_false (ev_is_active (w)))	2140	if (expect_false (ev_is_active (w)))
1359	return;	2141	return;
1360		2142
1361	assert (("ev_io_start called with negative fd", fd >= 0));	2143	assert (("ev_io_start called with negative fd", fd >= 0));
1362		2144
		2145	EV_FREQUENT_CHECK;
		2146
1363	ev_start (EV_A_ (W)w, 1);	2147	ev_start (EV_A_ (W)w, 1);
1364	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2148	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1365	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2149	wlist_add (&anfds[fd].head, (WL)w);
1366		2150
1367	fd_change (EV_A_ fd);	2151	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1368	}	2152	w->events &= ~EV_IOFDSET;
1369		2153
1370	void	2154	EV_FREQUENT_CHECK;
		2155	}
		2156
		2157	void noinline
1371	ev_io_stop (EV_P_ struct ev_io *w)	2158	ev_io_stop (EV_P_ ev_io *w)
1372	{	2159	{
1373	ev_clear_pending (EV_A_ (W)w);	2160	clear_pending (EV_A_ (W)w);
1374	if (expect_false (!ev_is_active (w)))	2161	if (expect_false (!ev_is_active (w)))
1375	return;	2162	return;
1376		2163
1377	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2164	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1378		2165
		2166	EV_FREQUENT_CHECK;
		2167
1379	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2168	wlist_del (&anfds[w->fd].head, (WL)w);
1380	ev_stop (EV_A_ (W)w);	2169	ev_stop (EV_A_ (W)w);
1381		2170
1382	fd_change (EV_A_ w->fd);	2171	fd_change (EV_A_ w->fd, 1);
1383	}
1384		2172
1385	void	2173	EV_FREQUENT_CHECK;
		2174	}
		2175
		2176	void noinline
1386	ev_timer_start (EV_P_ struct ev_timer *w)	2177	ev_timer_start (EV_P_ ev_timer *w)
1387	{	2178	{
1388	if (expect_false (ev_is_active (w)))	2179	if (expect_false (ev_is_active (w)))
1389	return;	2180	return;
1390		2181
1391	((WT)w)->at += mn_now;	2182	ev_at (w) += mn_now;
1392		2183
1393	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2184	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1394		2185
		2186	EV_FREQUENT_CHECK;
		2187
		2188	++timercnt;
1395	ev_start (EV_A_ (W)w, ++timercnt);	2189	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1396	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);	2190	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1397	timers [timercnt - 1] = w;	2191	ANHE_w (timers [ev_active (w)]) = (WT)w;
1398	upheap ((WT *)timers, timercnt - 1);	2192	ANHE_at_cache (timers [ev_active (w)]);
		2193	upheap (timers, ev_active (w));
1399		2194
		2195	EV_FREQUENT_CHECK;
		2196
1400	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2197	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1401	}	2198	}
1402		2199
1403	void	2200	void noinline
1404	ev_timer_stop (EV_P_ struct ev_timer *w)	2201	ev_timer_stop (EV_P_ ev_timer *w)
1405	{	2202	{
1406	ev_clear_pending (EV_A_ (W)w);	2203	clear_pending (EV_A_ (W)w);
1407	if (expect_false (!ev_is_active (w)))	2204	if (expect_false (!ev_is_active (w)))
1408	return;	2205	return;
1409		2206
		2207	EV_FREQUENT_CHECK;
		2208
		2209	{
		2210	int active = ev_active (w);
		2211
1410	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2212	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1411		2213
		2214	--timercnt;
		2215
1412	if (expect_true (((W)w)->active < timercnt--))	2216	if (expect_true (active < timercnt + HEAP0))
1413	{	2217	{
1414	timers [((W)w)->active - 1] = timers [timercnt];	2218	timers [active] = timers [timercnt + HEAP0];
1415	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2219	adjustheap (timers, timercnt, active);
1416	}	2220	}
		2221	}
1417		2222
1418	((WT)w)->at -= mn_now;	2223	EV_FREQUENT_CHECK;
		2224
		2225	ev_at (w) -= mn_now;
1419		2226
1420	ev_stop (EV_A_ (W)w);	2227	ev_stop (EV_A_ (W)w);
1421	}	2228	}
1422		2229
1423	void	2230	void noinline
1424	ev_timer_again (EV_P_ struct ev_timer *w)	2231	ev_timer_again (EV_P_ ev_timer *w)
1425	{	2232	{
		2233	EV_FREQUENT_CHECK;
		2234
1426	if (ev_is_active (w))	2235	if (ev_is_active (w))
1427	{	2236	{
1428	if (w->repeat)	2237	if (w->repeat)
1429	{	2238	{
1430	((WT)w)->at = mn_now + w->repeat;	2239	ev_at (w) = mn_now + w->repeat;
		2240	ANHE_at_cache (timers [ev_active (w)]);
1431	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2241	adjustheap (timers, timercnt, ev_active (w));
1432	}	2242	}
1433	else	2243	else
1434	ev_timer_stop (EV_A_ w);	2244	ev_timer_stop (EV_A_ w);
1435	}	2245	}
1436	else if (w->repeat)	2246	else if (w->repeat)
1437	{	2247	{
1438	w->at = w->repeat;	2248	ev_at (w) = w->repeat;
1439	ev_timer_start (EV_A_ w);	2249	ev_timer_start (EV_A_ w);
1440	}	2250	}
1441	}
1442		2251
		2252	EV_FREQUENT_CHECK;
		2253	}
		2254
1443	#if EV_PERIODICS	2255	#if EV_PERIODIC_ENABLE
1444	void	2256	void noinline
1445	ev_periodic_start (EV_P_ struct ev_periodic *w)	2257	ev_periodic_start (EV_P_ ev_periodic *w)
1446	{	2258	{
1447	if (expect_false (ev_is_active (w)))	2259	if (expect_false (ev_is_active (w)))
1448	return;	2260	return;
1449		2261
1450	if (w->reschedule_cb)	2262	if (w->reschedule_cb)
1451	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2263	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1452	else if (w->interval)	2264	else if (w->interval)
1453	{	2265	{
1454	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2266	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1455	/* this formula differs from the one in periodic_reify because we do not always round up */	2267	/* this formula differs from the one in periodic_reify because we do not always round up */
1456	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2268	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1457	}	2269	}
		2270	else
		2271	ev_at (w) = w->offset;
1458		2272
		2273	EV_FREQUENT_CHECK;
		2274
		2275	++periodiccnt;
1459	ev_start (EV_A_ (W)w, ++periodiccnt);	2276	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1460	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2277	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1461	periodics [periodiccnt - 1] = w;	2278	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1462	upheap ((WT *)periodics, periodiccnt - 1);	2279	ANHE_at_cache (periodics [ev_active (w)]);
		2280	upheap (periodics, ev_active (w));
1463		2281
		2282	EV_FREQUENT_CHECK;
		2283
1464	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2284	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1465	}	2285	}
1466		2286
1467	void	2287	void noinline
1468	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2288	ev_periodic_stop (EV_P_ ev_periodic *w)
1469	{	2289	{
1470	ev_clear_pending (EV_A_ (W)w);	2290	clear_pending (EV_A_ (W)w);
1471	if (expect_false (!ev_is_active (w)))	2291	if (expect_false (!ev_is_active (w)))
1472	return;	2292	return;
1473		2293
		2294	EV_FREQUENT_CHECK;
		2295
		2296	{
		2297	int active = ev_active (w);
		2298
1474	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2299	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1475		2300
		2301	--periodiccnt;
		2302
1476	if (expect_true (((W)w)->active < periodiccnt--))	2303	if (expect_true (active < periodiccnt + HEAP0))
1477	{	2304	{
1478	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2305	periodics [active] = periodics [periodiccnt + HEAP0];
1479	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2306	adjustheap (periodics, periodiccnt, active);
1480	}	2307	}
		2308	}
		2309
		2310	EV_FREQUENT_CHECK;
1481		2311
1482	ev_stop (EV_A_ (W)w);	2312	ev_stop (EV_A_ (W)w);
1483	}	2313	}
1484		2314
1485	void	2315	void noinline
1486	ev_periodic_again (EV_P_ struct ev_periodic *w)	2316	ev_periodic_again (EV_P_ ev_periodic *w)
1487	{	2317	{
1488	/* TODO: use adjustheap and recalculation */	2318	/* TODO: use adjustheap and recalculation */
1489	ev_periodic_stop (EV_A_ w);	2319	ev_periodic_stop (EV_A_ w);
1490	ev_periodic_start (EV_A_ w);	2320	ev_periodic_start (EV_A_ w);
1491	}	2321	}
1492	#endif	2322	#endif
1493		2323
1494	void	2324	#ifndef SA_RESTART
1495	ev_idle_start (EV_P_ struct ev_idle *w)	2325	# define SA_RESTART 0
		2326	#endif
		2327
		2328	void noinline
		2329	ev_signal_start (EV_P_ ev_signal *w)
1496	{	2330	{
		2331	#if EV_MULTIPLICITY
		2332	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2333	#endif
1497	if (expect_false (ev_is_active (w)))	2334	if (expect_false (ev_is_active (w)))
1498	return;	2335	return;
1499		2336
1500	ev_start (EV_A_ (W)w, ++idlecnt);
1501	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1502	idles [idlecnt - 1] = w;
1503	}
1504
1505	void
1506	ev_idle_stop (EV_P_ struct ev_idle *w)
1507	{
1508	ev_clear_pending (EV_A_ (W)w);
1509	if (expect_false (!ev_is_active (w)))
1510	return;
1511
1512	idles [((W)w)->active - 1] = idles [--idlecnt];
1513	ev_stop (EV_A_ (W)w);
1514	}
1515
1516	void
1517	ev_prepare_start (EV_P_ struct ev_prepare *w)
1518	{
1519	if (expect_false (ev_is_active (w)))
1520	return;
1521
1522	ev_start (EV_A_ (W)w, ++preparecnt);
1523	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1524	prepares [preparecnt - 1] = w;
1525	}
1526
1527	void
1528	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1529	{
1530	ev_clear_pending (EV_A_ (W)w);
1531	if (expect_false (!ev_is_active (w)))
1532	return;
1533
1534	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1535	ev_stop (EV_A_ (W)w);
1536	}
1537
1538	void
1539	ev_check_start (EV_P_ struct ev_check *w)
1540	{
1541	if (expect_false (ev_is_active (w)))
1542	return;
1543
1544	ev_start (EV_A_ (W)w, ++checkcnt);
1545	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1546	checks [checkcnt - 1] = w;
1547	}
1548
1549	void
1550	ev_check_stop (EV_P_ struct ev_check *w)
1551	{
1552	ev_clear_pending (EV_A_ (W)w);
1553	if (expect_false (!ev_is_active (w)))
1554	return;
1555
1556	checks [((W)w)->active - 1] = checks [--checkcnt];
1557	ev_stop (EV_A_ (W)w);
1558	}
1559
1560	#ifndef SA_RESTART
1561	# define SA_RESTART 0
1562	#endif
1563
1564	void
1565	ev_signal_start (EV_P_ struct ev_signal *w)
1566	{
1567	#if EV_MULTIPLICITY
1568	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1569	#endif
1570	if (expect_false (ev_is_active (w)))
1571	return;
1572
1573	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2337	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1574		2338
		2339	evpipe_init (EV_A);
		2340
		2341	EV_FREQUENT_CHECK;
		2342
		2343	{
		2344	#ifndef _WIN32
		2345	sigset_t full, prev;
		2346	sigfillset (&full);
		2347	sigprocmask (SIG_SETMASK, &full, &prev);
		2348	#endif
		2349
		2350	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2351
		2352	#ifndef _WIN32
		2353	sigprocmask (SIG_SETMASK, &prev, 0);
		2354	#endif
		2355	}
		2356
1575	ev_start (EV_A_ (W)w, 1);	2357	ev_start (EV_A_ (W)w, 1);
1576	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1577	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2358	wlist_add (&signals [w->signum - 1].head, (WL)w);
1578		2359
1579	if (!((WL)w)->next)	2360	if (!((WL)w)->next)
1580	{	2361	{
1581	#if _WIN32	2362	#if _WIN32
1582	signal (w->signum, sighandler);	2363	signal (w->signum, ev_sighandler);
1583	#else	2364	#else
1584	struct sigaction sa;	2365	struct sigaction sa;
1585	sa.sa_handler = sighandler;	2366	sa.sa_handler = ev_sighandler;
1586	sigfillset (&sa.sa_mask);	2367	sigfillset (&sa.sa_mask);
1587	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2368	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1588	sigaction (w->signum, &sa, 0);	2369	sigaction (w->signum, &sa, 0);
1589	#endif	2370	#endif
1590	}	2371	}
1591	}
1592		2372
1593	void	2373	EV_FREQUENT_CHECK;
		2374	}
		2375
		2376	void noinline
1594	ev_signal_stop (EV_P_ struct ev_signal *w)	2377	ev_signal_stop (EV_P_ ev_signal *w)
1595	{	2378	{
1596	ev_clear_pending (EV_A_ (W)w);	2379	clear_pending (EV_A_ (W)w);
1597	if (expect_false (!ev_is_active (w)))	2380	if (expect_false (!ev_is_active (w)))
1598	return;	2381	return;
1599		2382
		2383	EV_FREQUENT_CHECK;
		2384
1600	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2385	wlist_del (&signals [w->signum - 1].head, (WL)w);
1601	ev_stop (EV_A_ (W)w);	2386	ev_stop (EV_A_ (W)w);
1602		2387
1603	if (!signals [w->signum - 1].head)	2388	if (!signals [w->signum - 1].head)
1604	signal (w->signum, SIG_DFL);	2389	signal (w->signum, SIG_DFL);
1605	}
1606		2390
		2391	EV_FREQUENT_CHECK;
		2392	}
		2393
1607	void	2394	void
1608	ev_child_start (EV_P_ struct ev_child *w)	2395	ev_child_start (EV_P_ ev_child *w)
1609	{	2396	{
1610	#if EV_MULTIPLICITY	2397	#if EV_MULTIPLICITY
1611	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2398	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1612	#endif	2399	#endif
1613	if (expect_false (ev_is_active (w)))	2400	if (expect_false (ev_is_active (w)))
1614	return;	2401	return;
1615		2402
		2403	EV_FREQUENT_CHECK;
		2404
1616	ev_start (EV_A_ (W)w, 1);	2405	ev_start (EV_A_ (W)w, 1);
1617	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2406	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1618	}
1619		2407
		2408	EV_FREQUENT_CHECK;
		2409	}
		2410
1620	void	2411	void
1621	ev_child_stop (EV_P_ struct ev_child *w)	2412	ev_child_stop (EV_P_ ev_child *w)
1622	{	2413	{
1623	ev_clear_pending (EV_A_ (W)w);	2414	clear_pending (EV_A_ (W)w);
1624	if (expect_false (!ev_is_active (w)))	2415	if (expect_false (!ev_is_active (w)))
1625	return;	2416	return;
1626		2417
		2418	EV_FREQUENT_CHECK;
		2419
1627	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2420	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1628	ev_stop (EV_A_ (W)w);	2421	ev_stop (EV_A_ (W)w);
		2422
		2423	EV_FREQUENT_CHECK;
1629	}	2424	}
		2425
		2426	#if EV_STAT_ENABLE
		2427
		2428	# ifdef _WIN32
		2429	# undef lstat
		2430	# define lstat(a,b) _stati64 (a,b)
		2431	# endif
		2432
		2433	#define DEF_STAT_INTERVAL 5.0074891
		2434	#define MIN_STAT_INTERVAL 0.1074891
		2435
		2436	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2437
		2438	#if EV_USE_INOTIFY
		2439	# define EV_INOTIFY_BUFSIZE 8192
		2440
		2441	static void noinline
		2442	infy_add (EV_P_ ev_stat *w)
		2443	{
		2444	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);
		2445
		2446	if (w->wd < 0)
		2447	{
		2448	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2449
		2450	/* monitor some parent directory for speedup hints */
		2451	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2452	/* but an efficiency issue only */
		2453	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2454	{
		2455	char path [4096];
		2456	strcpy (path, w->path);
		2457
		2458	do
		2459	{
		2460	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2461	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2462
		2463	char *pend = strrchr (path, '/');
		2464
		2465	if (!pend)
		2466	break; /* whoops, no '/', complain to your admin */
		2467
		2468	*pend = 0;
		2469	w->wd = inotify_add_watch (fs_fd, path, mask);
		2470	}
		2471	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2472	}
		2473	}
		2474	else
		2475	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2476
		2477	if (w->wd >= 0)
		2478	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2479	}
		2480
		2481	static void noinline
		2482	infy_del (EV_P_ ev_stat *w)
		2483	{
		2484	int slot;
		2485	int wd = w->wd;
		2486
		2487	if (wd < 0)
		2488	return;
		2489
		2490	w->wd = -2;
		2491	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2492	wlist_del (&fs_hash [slot].head, (WL)w);
		2493
		2494	/* remove this watcher, if others are watching it, they will rearm */
		2495	inotify_rm_watch (fs_fd, wd);
		2496	}
		2497
		2498	static void noinline
		2499	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2500	{
		2501	if (slot < 0)
		2502	/* overflow, need to check for all hash slots */
		2503	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2504	infy_wd (EV_A_ slot, wd, ev);
		2505	else
		2506	{
		2507	WL w_;
		2508
		2509	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2510	{
		2511	ev_stat *w = (ev_stat *)w_;
		2512	w_ = w_->next; /* lets us remove this watcher and all before it */
		2513
		2514	if (w->wd == wd || wd == -1)
		2515	{
		2516	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2517	{
		2518	w->wd = -1;
		2519	infy_add (EV_A_ w); /* re-add, no matter what */
		2520	}
		2521
		2522	stat_timer_cb (EV_A_ &w->timer, 0);
		2523	}
		2524	}
		2525	}
		2526	}
		2527
		2528	static void
		2529	infy_cb (EV_P_ ev_io *w, int revents)
		2530	{
		2531	char buf [EV_INOTIFY_BUFSIZE];
		2532	struct inotify_event *ev = (struct inotify_event *)buf;
		2533	int ofs;
		2534	int len = read (fs_fd, buf, sizeof (buf));
		2535
		2536	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2537	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2538	}
		2539
		2540	void inline_size
		2541	infy_init (EV_P)
		2542	{
		2543	if (fs_fd != -2)
		2544	return;
		2545
		2546	/* kernels < 2.6.25 are borked
		2547	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		2548	*/
		2549	{
		2550	struct utsname buf;
		2551	int major, minor, micro;
		2552
		2553	fs_fd = -1;
		2554
		2555	if (uname (&buf))
		2556	return;
		2557
		2558	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
		2559	return;
		2560
		2561	if (major < 2
		2562	|| (major == 2 && minor < 6)
		2563	|| (major == 2 && minor == 6 && micro < 25))
		2564	return;
		2565	}
		2566
		2567	fs_fd = inotify_init ();
		2568
		2569	if (fs_fd >= 0)
		2570	{
		2571	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2572	ev_set_priority (&fs_w, EV_MAXPRI);
		2573	ev_io_start (EV_A_ &fs_w);
		2574	}
		2575	}
		2576
		2577	void inline_size
		2578	infy_fork (EV_P)
		2579	{
		2580	int slot;
		2581
		2582	if (fs_fd < 0)
		2583	return;
		2584
		2585	close (fs_fd);
		2586	fs_fd = inotify_init ();
		2587
		2588	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2589	{
		2590	WL w_ = fs_hash [slot].head;
		2591	fs_hash [slot].head = 0;
		2592
		2593	while (w_)
		2594	{
		2595	ev_stat *w = (ev_stat *)w_;
		2596	w_ = w_->next; /* lets us add this watcher */
		2597
		2598	w->wd = -1;
		2599
		2600	if (fs_fd >= 0)
		2601	infy_add (EV_A_ w); /* re-add, no matter what */
		2602	else
		2603	ev_timer_start (EV_A_ &w->timer);
		2604	}
		2605	}
		2606	}
		2607
		2608	#endif
		2609
		2610	#ifdef _WIN32
		2611	# define EV_LSTAT(p,b) _stati64 (p, b)
		2612	#else
		2613	# define EV_LSTAT(p,b) lstat (p, b)
		2614	#endif
		2615
		2616	void
		2617	ev_stat_stat (EV_P_ ev_stat *w)
		2618	{
		2619	if (lstat (w->path, &w->attr) < 0)
		2620	w->attr.st_nlink = 0;
		2621	else if (!w->attr.st_nlink)
		2622	w->attr.st_nlink = 1;
		2623	}
		2624
		2625	static void noinline
		2626	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2627	{
		2628	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2629
		2630	/* we copy this here each the time so that */
		2631	/* prev has the old value when the callback gets invoked */
		2632	w->prev = w->attr;
		2633	ev_stat_stat (EV_A_ w);
		2634
		2635	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2636	if (
		2637	w->prev.st_dev != w->attr.st_dev
		2638	|| w->prev.st_ino != w->attr.st_ino
		2639	|| w->prev.st_mode != w->attr.st_mode
		2640	|| w->prev.st_nlink != w->attr.st_nlink
		2641	|| w->prev.st_uid != w->attr.st_uid
		2642	|| w->prev.st_gid != w->attr.st_gid
		2643	|| w->prev.st_rdev != w->attr.st_rdev
		2644	|| w->prev.st_size != w->attr.st_size
		2645	|| w->prev.st_atime != w->attr.st_atime
		2646	|| w->prev.st_mtime != w->attr.st_mtime
		2647	|| w->prev.st_ctime != w->attr.st_ctime
		2648	) {
		2649	#if EV_USE_INOTIFY
		2650	if (fs_fd >= 0)
		2651	{
		2652	infy_del (EV_A_ w);
		2653	infy_add (EV_A_ w);
		2654	ev_stat_stat (EV_A_ w); /* avoid race... */
		2655	}
		2656	#endif
		2657
		2658	ev_feed_event (EV_A_ w, EV_STAT);
		2659	}
		2660	}
		2661
		2662	void
		2663	ev_stat_start (EV_P_ ev_stat *w)
		2664	{
		2665	if (expect_false (ev_is_active (w)))
		2666	return;
		2667
		2668	/* since we use memcmp, we need to clear any padding data etc. */
		2669	memset (&w->prev, 0, sizeof (ev_statdata));
		2670	memset (&w->attr, 0, sizeof (ev_statdata));
		2671
		2672	ev_stat_stat (EV_A_ w);
		2673
		2674	if (w->interval < MIN_STAT_INTERVAL)
		2675	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2676
		2677	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2678	ev_set_priority (&w->timer, ev_priority (w));
		2679
		2680	#if EV_USE_INOTIFY
		2681	infy_init (EV_A);
		2682
		2683	if (fs_fd >= 0)
		2684	infy_add (EV_A_ w);
		2685	else
		2686	#endif
		2687	ev_timer_start (EV_A_ &w->timer);
		2688
		2689	ev_start (EV_A_ (W)w, 1);
		2690
		2691	EV_FREQUENT_CHECK;
		2692	}
		2693
		2694	void
		2695	ev_stat_stop (EV_P_ ev_stat *w)
		2696	{
		2697	clear_pending (EV_A_ (W)w);
		2698	if (expect_false (!ev_is_active (w)))
		2699	return;
		2700
		2701	EV_FREQUENT_CHECK;
		2702
		2703	#if EV_USE_INOTIFY
		2704	infy_del (EV_A_ w);
		2705	#endif
		2706	ev_timer_stop (EV_A_ &w->timer);
		2707
		2708	ev_stop (EV_A_ (W)w);
		2709
		2710	EV_FREQUENT_CHECK;
		2711	}
		2712	#endif
		2713
		2714	#if EV_IDLE_ENABLE
		2715	void
		2716	ev_idle_start (EV_P_ ev_idle *w)
		2717	{
		2718	if (expect_false (ev_is_active (w)))
		2719	return;
		2720
		2721	pri_adjust (EV_A_ (W)w);
		2722
		2723	EV_FREQUENT_CHECK;
		2724
		2725	{
		2726	int active = ++idlecnt [ABSPRI (w)];
		2727
		2728	++idleall;
		2729	ev_start (EV_A_ (W)w, active);
		2730
		2731	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2732	idles [ABSPRI (w)][active - 1] = w;
		2733	}
		2734
		2735	EV_FREQUENT_CHECK;
		2736	}
		2737
		2738	void
		2739	ev_idle_stop (EV_P_ ev_idle *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	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2751	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2752
		2753	ev_stop (EV_A_ (W)w);
		2754	--idleall;
		2755	}
		2756
		2757	EV_FREQUENT_CHECK;
		2758	}
		2759	#endif
		2760
		2761	void
		2762	ev_prepare_start (EV_P_ ev_prepare *w)
		2763	{
		2764	if (expect_false (ev_is_active (w)))
		2765	return;
		2766
		2767	EV_FREQUENT_CHECK;
		2768
		2769	ev_start (EV_A_ (W)w, ++preparecnt);
		2770	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2771	prepares [preparecnt - 1] = w;
		2772
		2773	EV_FREQUENT_CHECK;
		2774	}
		2775
		2776	void
		2777	ev_prepare_stop (EV_P_ ev_prepare *w)
		2778	{
		2779	clear_pending (EV_A_ (W)w);
		2780	if (expect_false (!ev_is_active (w)))
		2781	return;
		2782
		2783	EV_FREQUENT_CHECK;
		2784
		2785	{
		2786	int active = ev_active (w);
		2787
		2788	prepares [active - 1] = prepares [--preparecnt];
		2789	ev_active (prepares [active - 1]) = active;
		2790	}
		2791
		2792	ev_stop (EV_A_ (W)w);
		2793
		2794	EV_FREQUENT_CHECK;
		2795	}
		2796
		2797	void
		2798	ev_check_start (EV_P_ ev_check *w)
		2799	{
		2800	if (expect_false (ev_is_active (w)))
		2801	return;
		2802
		2803	EV_FREQUENT_CHECK;
		2804
		2805	ev_start (EV_A_ (W)w, ++checkcnt);
		2806	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2807	checks [checkcnt - 1] = w;
		2808
		2809	EV_FREQUENT_CHECK;
		2810	}
		2811
		2812	void
		2813	ev_check_stop (EV_P_ ev_check *w)
		2814	{
		2815	clear_pending (EV_A_ (W)w);
		2816	if (expect_false (!ev_is_active (w)))
		2817	return;
		2818
		2819	EV_FREQUENT_CHECK;
		2820
		2821	{
		2822	int active = ev_active (w);
		2823
		2824	checks [active - 1] = checks [--checkcnt];
		2825	ev_active (checks [active - 1]) = active;
		2826	}
		2827
		2828	ev_stop (EV_A_ (W)w);
		2829
		2830	EV_FREQUENT_CHECK;
		2831	}
		2832
		2833	#if EV_EMBED_ENABLE
		2834	void noinline
		2835	ev_embed_sweep (EV_P_ ev_embed *w)
		2836	{
		2837	ev_loop (w->other, EVLOOP_NONBLOCK);
		2838	}
		2839
		2840	static void
		2841	embed_io_cb (EV_P_ ev_io *io, int revents)
		2842	{
		2843	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2844
		2845	if (ev_cb (w))
		2846	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2847	else
		2848	ev_loop (w->other, EVLOOP_NONBLOCK);
		2849	}
		2850
		2851	static void
		2852	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2853	{
		2854	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2855
		2856	{
		2857	struct ev_loop *loop = w->other;
		2858
		2859	while (fdchangecnt)
		2860	{
		2861	fd_reify (EV_A);
		2862	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2863	}
		2864	}
		2865	}
		2866
		2867	static void
		2868	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		2869	{
		2870	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		2871
		2872	{
		2873	struct ev_loop *loop = w->other;
		2874
		2875	ev_loop_fork (EV_A);
		2876	}
		2877	}
		2878
		2879	#if 0
		2880	static void
		2881	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2882	{
		2883	ev_idle_stop (EV_A_ idle);
		2884	}
		2885	#endif
		2886
		2887	void
		2888	ev_embed_start (EV_P_ ev_embed *w)
		2889	{
		2890	if (expect_false (ev_is_active (w)))
		2891	return;
		2892
		2893	{
		2894	struct ev_loop *loop = w->other;
		2895	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2896	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2897	}
		2898
		2899	EV_FREQUENT_CHECK;
		2900
		2901	ev_set_priority (&w->io, ev_priority (w));
		2902	ev_io_start (EV_A_ &w->io);
		2903
		2904	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2905	ev_set_priority (&w->prepare, EV_MINPRI);
		2906	ev_prepare_start (EV_A_ &w->prepare);
		2907
		2908	ev_fork_init (&w->fork, embed_fork_cb);
		2909	ev_fork_start (EV_A_ &w->fork);
		2910
		2911	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2912
		2913	ev_start (EV_A_ (W)w, 1);
		2914
		2915	EV_FREQUENT_CHECK;
		2916	}
		2917
		2918	void
		2919	ev_embed_stop (EV_P_ ev_embed *w)
		2920	{
		2921	clear_pending (EV_A_ (W)w);
		2922	if (expect_false (!ev_is_active (w)))
		2923	return;
		2924
		2925	EV_FREQUENT_CHECK;
		2926
		2927	ev_io_stop (EV_A_ &w->io);
		2928	ev_prepare_stop (EV_A_ &w->prepare);
		2929	ev_fork_stop (EV_A_ &w->fork);
		2930
		2931	EV_FREQUENT_CHECK;
		2932	}
		2933	#endif
		2934
		2935	#if EV_FORK_ENABLE
		2936	void
		2937	ev_fork_start (EV_P_ ev_fork *w)
		2938	{
		2939	if (expect_false (ev_is_active (w)))
		2940	return;
		2941
		2942	EV_FREQUENT_CHECK;
		2943
		2944	ev_start (EV_A_ (W)w, ++forkcnt);
		2945	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2946	forks [forkcnt - 1] = w;
		2947
		2948	EV_FREQUENT_CHECK;
		2949	}
		2950
		2951	void
		2952	ev_fork_stop (EV_P_ ev_fork *w)
		2953	{
		2954	clear_pending (EV_A_ (W)w);
		2955	if (expect_false (!ev_is_active (w)))
		2956	return;
		2957
		2958	EV_FREQUENT_CHECK;
		2959
		2960	{
		2961	int active = ev_active (w);
		2962
		2963	forks [active - 1] = forks [--forkcnt];
		2964	ev_active (forks [active - 1]) = active;
		2965	}
		2966
		2967	ev_stop (EV_A_ (W)w);
		2968
		2969	EV_FREQUENT_CHECK;
		2970	}
		2971	#endif
		2972
		2973	#if EV_ASYNC_ENABLE
		2974	void
		2975	ev_async_start (EV_P_ ev_async *w)
		2976	{
		2977	if (expect_false (ev_is_active (w)))
		2978	return;
		2979
		2980	evpipe_init (EV_A);
		2981
		2982	EV_FREQUENT_CHECK;
		2983
		2984	ev_start (EV_A_ (W)w, ++asynccnt);
		2985	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2986	asyncs [asynccnt - 1] = w;
		2987
		2988	EV_FREQUENT_CHECK;
		2989	}
		2990
		2991	void
		2992	ev_async_stop (EV_P_ ev_async *w)
		2993	{
		2994	clear_pending (EV_A_ (W)w);
		2995	if (expect_false (!ev_is_active (w)))
		2996	return;
		2997
		2998	EV_FREQUENT_CHECK;
		2999
		3000	{
		3001	int active = ev_active (w);
		3002
		3003	asyncs [active - 1] = asyncs [--asynccnt];
		3004	ev_active (asyncs [active - 1]) = active;
		3005	}
		3006
		3007	ev_stop (EV_A_ (W)w);
		3008
		3009	EV_FREQUENT_CHECK;
		3010	}
		3011
		3012	void
		3013	ev_async_send (EV_P_ ev_async *w)
		3014	{
		3015	w->sent = 1;
		3016	evpipe_write (EV_A_ &gotasync);
		3017	}
		3018	#endif
1630		3019
1631	/*****************************************************************************/	3020	/*****************************************************************************/
1632		3021
1633	struct ev_once	3022	struct ev_once
1634	{	3023	{
1635	struct ev_io io;	3024	ev_io io;
1636	struct ev_timer to;	3025	ev_timer to;
1637	void (*cb)(int revents, void *arg);	3026	void (*cb)(int revents, void *arg);
1638	void *arg;	3027	void *arg;
1639	};	3028	};
1640		3029
1641	static void	3030	static void
1642	once_cb (EV_P_ struct ev_once *once, int revents)	3031	once_cb (EV_P_ struct ev_once *once, int revents)
1643	{	3032	{
1644	void (*cb)(int revents, void *arg) = once->cb;	3033	void (*cb)(int revents, void *arg) = once->cb;
1645	void *arg = once->arg;	3034	void *arg = once->arg;
1646		3035
1647	ev_io_stop (EV_A_ &once->io);	3036	ev_io_stop (EV_A_ &once->io);
1648	ev_timer_stop (EV_A_ &once->to);	3037	ev_timer_stop (EV_A_ &once->to);
1649	ev_free (once);	3038	ev_free (once);
1650		3039
1651	cb (revents, arg);	3040	cb (revents, arg);
1652	}	3041	}
1653		3042
1654	static void	3043	static void
1655	once_cb_io (EV_P_ struct ev_io *w, int revents)	3044	once_cb_io (EV_P_ ev_io *w, int revents)
1656	{	3045	{
1657	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3046	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3047
		3048	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1658	}	3049	}
1659		3050
1660	static void	3051	static void
1661	once_cb_to (EV_P_ struct ev_timer *w, int revents)	3052	once_cb_to (EV_P_ ev_timer *w, int revents)
1662	{	3053	{
1663	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3054	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3055
		3056	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1664	}	3057	}
1665		3058
1666	void	3059	void
1667	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3060	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1668	{	3061	{
…		…
1690	ev_timer_set (&once->to, timeout, 0.);	3083	ev_timer_set (&once->to, timeout, 0.);
1691	ev_timer_start (EV_A_ &once->to);	3084	ev_timer_start (EV_A_ &once->to);
1692	}	3085	}
1693	}	3086	}
1694		3087
		3088	#if EV_MULTIPLICITY
		3089	#include "ev_wrap.h"
		3090	#endif
		3091
1695	#ifdef __cplusplus	3092	#ifdef __cplusplus
1696	}	3093	}
1697	#endif	3094	#endif
1698		3095

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