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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 1.252 by root, Thu May 22 03:43:32 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
116	# define WIN32_LEAN_AND_MEAN	159	# define WIN32_LEAN_AND_MEAN
117	# include <windows.h>	160	# include <windows.h>
118	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
119	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
120	# endif	163	# endif
121	#endif	164	#endif
122		165
123	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
124		167
125	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
126	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
127	#endif	170	#endif
128		171
129	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
130	# define EV_USE_REALTIME 0	173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
131	#endif	178	#endif
132		179
133	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
134	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
135	#endif	182	#endif
…		…
141	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
142	# endif	189	# endif
143	#endif	190	#endif
144		191
145	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
146	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
147	#endif	198	#endif
148		199
149	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
150	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
151	#endif	202	#endif
152		203
153	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
154	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
155	#endif	206	#endif
156		207
157	/**/	208	#ifndef EV_USE_INOTIFY
158		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
159	/* darwin simply cannot be helped */	210	# define EV_USE_INOTIFY 1
160	#ifdef __APPLE__	211	# else
161	# undef EV_USE_POLL	212	# define EV_USE_INOTIFY 0
162	# undef EV_USE_KQUEUE
163	#endif	213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	#if 0 /* debugging */
		241	# define EV_VERIFY 3
		242	# define EV_USE_4HEAP 1
		243	# define EV_HEAP_CACHE_AT 1
		244	#endif
		245
		246	#ifndef EV_VERIFY
		247	# define EV_VERIFY !EV_MINIMAL
		248	#endif
		249
		250	#ifndef EV_USE_4HEAP
		251	# define EV_USE_4HEAP !EV_MINIMAL
		252	#endif
		253
		254	#ifndef EV_HEAP_CACHE_AT
		255	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		256	#endif
		257
		258	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
164		259
165	#ifndef CLOCK_MONOTONIC	260	#ifndef CLOCK_MONOTONIC
166	# undef EV_USE_MONOTONIC	261	# undef EV_USE_MONOTONIC
167	# define EV_USE_MONOTONIC 0	262	# define EV_USE_MONOTONIC 0
168	#endif	263	#endif
…		…
170	#ifndef CLOCK_REALTIME	265	#ifndef CLOCK_REALTIME
171	# undef EV_USE_REALTIME	266	# undef EV_USE_REALTIME
172	# define EV_USE_REALTIME 0	267	# define EV_USE_REALTIME 0
173	#endif	268	#endif
174		269
		270	#if !EV_STAT_ENABLE
		271	# undef EV_USE_INOTIFY
		272	# define EV_USE_INOTIFY 0
		273	#endif
		274
		275	#if !EV_USE_NANOSLEEP
		276	# ifndef _WIN32
		277	# include <sys/select.h>
		278	# endif
		279	#endif
		280
		281	#if EV_USE_INOTIFY
		282	# include <sys/inotify.h>
		283	#endif
		284
175	#if EV_SELECT_IS_WINSOCKET	285	#if EV_SELECT_IS_WINSOCKET
176	# include <winsock.h>	286	# include <winsock.h>
177	#endif	287	#endif
178		288
		289	#if EV_USE_EVENTFD
		290	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		291	# include <stdint.h>
		292	# ifdef __cplusplus
		293	extern "C" {
		294	# endif
		295	int eventfd (unsigned int initval, int flags);
		296	# ifdef __cplusplus
		297	}
		298	# endif
		299	#endif
		300
179	/**/	301	/**/
		302
		303	#if EV_VERIFY >= 3
		304	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		305	#else
		306	# define EV_FREQUENT_CHECK do { } while (0)
		307	#endif
		308
		309	/*
		310	* This is used to avoid floating point rounding problems.
		311	* It is added to ev_rt_now when scheduling periodics
		312	* to ensure progress, time-wise, even when rounding
		313	* errors are against us.
		314	* This value is good at least till the year 4000.
		315	* Better solutions welcome.
		316	*/
		317	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
180		318
181	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	319	#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) */	320	#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 */	321	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
185		322
186	#ifdef EV_H
187	# include EV_H
188	#else
189	# include "ev.h"
190	#endif
191
192	#if __GNUC__ >= 3	323	#if __GNUC__ >= 4
193	# define expect(expr,value) __builtin_expect ((expr),(value))	324	# define expect(expr,value) __builtin_expect ((expr),(value))
194	# define inline static inline	325	# define noinline __attribute__ ((noinline))
195	#else	326	#else
196	# define expect(expr,value) (expr)	327	# define expect(expr,value) (expr)
197	# define inline static	328	# define noinline
		329	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		330	# define inline
		331	# endif
198	#endif	332	#endif
199		333
200	#define expect_false(expr) expect ((expr) != 0, 0)	334	#define expect_false(expr) expect ((expr) != 0, 0)
201	#define expect_true(expr) expect ((expr) != 0, 1)	335	#define expect_true(expr) expect ((expr) != 0, 1)
		336	#define inline_size static inline
		337
		338	#if EV_MINIMAL
		339	# define inline_speed static noinline
		340	#else
		341	# define inline_speed static inline
		342	#endif
202		343
203	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	344	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
204	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	345	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
205		346
206	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	347	#define EMPTY /* required for microsofts broken pseudo-c compiler */
207	#define EMPTY2(a,b) /* used to suppress some warnings */	348	#define EMPTY2(a,b) /* used to suppress some warnings */
208		349
209	typedef struct ev_watcher *W;	350	typedef ev_watcher *W;
210	typedef struct ev_watcher_list *WL;	351	typedef ev_watcher_list *WL;
211	typedef struct ev_watcher_time *WT;	352	typedef ev_watcher_time *WT;
212		353
		354	#define ev_active(w) ((W)(w))->active
		355	#define ev_at(w) ((WT)(w))->at
		356
		357	#if EV_USE_MONOTONIC
		358	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		359	/* giving it a reasonably high chance of working on typical architetcures */
213	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	360	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		361	#endif
214		362
215	#ifdef _WIN32	363	#ifdef _WIN32
216	# include "ev_win32.c"	364	# include "ev_win32.c"
217	#endif	365	#endif
218		366
219	/*****************************************************************************/	367	/*****************************************************************************/
220		368
221	static void (*syserr_cb)(const char *msg);	369	static void (*syserr_cb)(const char *msg);
222		370
		371	void
223	void ev_set_syserr_cb (void (*cb)(const char *msg))	372	ev_set_syserr_cb (void (*cb)(const char *msg))
224	{	373	{
225	syserr_cb = cb;	374	syserr_cb = cb;
226	}	375	}
227		376
228	static void	377	static void noinline
229	syserr (const char *msg)	378	syserr (const char *msg)
230	{	379	{
231	if (!msg)	380	if (!msg)
232	msg = "(libev) system error";	381	msg = "(libev) system error";
233		382
…		…
238	perror (msg);	387	perror (msg);
239	abort ();	388	abort ();
240	}	389	}
241	}	390	}
242		391
		392	static void *
		393	ev_realloc_emul (void *ptr, long size)
		394	{
		395	/* some systems, notably openbsd and darwin, fail to properly
		396	* implement realloc (x, 0) (as required by both ansi c-98 and
		397	* the single unix specification, so work around them here.
		398	*/
		399
		400	if (size)
		401	return realloc (ptr, size);
		402
		403	free (ptr);
		404	return 0;
		405	}
		406
243	static void *(*alloc)(void *ptr, long size);	407	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
244		408
		409	void
245	void ev_set_allocator (void *(*cb)(void *ptr, long size))	410	ev_set_allocator (void *(*cb)(void *ptr, long size))
246	{	411	{
247	alloc = cb;	412	alloc = cb;
248	}	413	}
249		414
250	static void *	415	inline_speed void *
251	ev_realloc (void *ptr, long size)	416	ev_realloc (void *ptr, long size)
252	{	417	{
253	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	418	ptr = alloc (ptr, size);
254		419
255	if (!ptr && size)	420	if (!ptr && size)
256	{	421	{
257	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	422	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
258	abort ();	423	abort ();
…		…
279	typedef struct	444	typedef struct
280	{	445	{
281	W w;	446	W w;
282	int events;	447	int events;
283	} ANPENDING;	448	} ANPENDING;
		449
		450	#if EV_USE_INOTIFY
		451	/* hash table entry per inotify-id */
		452	typedef struct
		453	{
		454	WL head;
		455	} ANFS;
		456	#endif
		457
		458	/* Heap Entry */
		459	#if EV_HEAP_CACHE_AT
		460	typedef struct {
		461	ev_tstamp at;
		462	WT w;
		463	} ANHE;
		464
		465	#define ANHE_w(he) (he).w /* access watcher, read-write */
		466	#define ANHE_at(he) (he).at /* access cached at, read-only */
		467	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		468	#else
		469	typedef WT ANHE;
		470
		471	#define ANHE_w(he) (he)
		472	#define ANHE_at(he) (he)->at
		473	#define ANHE_at_cache(he)
		474	#endif
284		475
285	#if EV_MULTIPLICITY	476	#if EV_MULTIPLICITY
286		477
287	struct ev_loop	478	struct ev_loop
288	{	479	{
…		…
322	gettimeofday (&tv, 0);	513	gettimeofday (&tv, 0);
323	return tv.tv_sec + tv.tv_usec * 1e-6;	514	return tv.tv_sec + tv.tv_usec * 1e-6;
324	#endif	515	#endif
325	}	516	}
326		517
327	inline ev_tstamp	518	ev_tstamp inline_size
328	get_clock (void)	519	get_clock (void)
329	{	520	{
330	#if EV_USE_MONOTONIC	521	#if EV_USE_MONOTONIC
331	if (expect_true (have_monotonic))	522	if (expect_true (have_monotonic))
332	{	523	{
…		…
345	{	536	{
346	return ev_rt_now;	537	return ev_rt_now;
347	}	538	}
348	#endif	539	#endif
349		540
350	#define array_roundsize(type,n) (((n) | 4) & ~3)	541	void
		542	ev_sleep (ev_tstamp delay)
		543	{
		544	if (delay > 0.)
		545	{
		546	#if EV_USE_NANOSLEEP
		547	struct timespec ts;
		548
		549	ts.tv_sec = (time_t)delay;
		550	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		551
		552	nanosleep (&ts, 0);
		553	#elif defined(_WIN32)
		554	Sleep ((unsigned long)(delay * 1e3));
		555	#else
		556	struct timeval tv;
		557
		558	tv.tv_sec = (time_t)delay;
		559	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		560
		561	select (0, 0, 0, 0, &tv);
		562	#endif
		563	}
		564	}
		565
		566	/*****************************************************************************/
		567
		568	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		569
		570	int inline_size
		571	array_nextsize (int elem, int cur, int cnt)
		572	{
		573	int ncur = cur + 1;
		574
		575	do
		576	ncur <<= 1;
		577	while (cnt > ncur);
		578
		579	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		580	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		581	{
		582	ncur *= elem;
		583	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		584	ncur = ncur - sizeof (void *) * 4;
		585	ncur /= elem;
		586	}
		587
		588	return ncur;
		589	}
		590
		591	static noinline void *
		592	array_realloc (int elem, void *base, int *cur, int cnt)
		593	{
		594	*cur = array_nextsize (elem, *cur, cnt);
		595	return ev_realloc (base, elem * *cur);
		596	}
351		597
352	#define array_needsize(type,base,cur,cnt,init) \	598	#define array_needsize(type,base,cur,cnt,init) \
353	if (expect_false ((cnt) > cur)) \	599	if (expect_false ((cnt) > (cur))) \
354	{ \	600	{ \
355	int newcnt = cur; \	601	int ocur_ = (cur); \
356	do \	602	(base) = (type *)array_realloc \
357	{ \	603	(sizeof (type), (base), &(cur), (cnt)); \
358	newcnt = array_roundsize (type, newcnt << 1); \	604	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	}	605	}
366		606
		607	#if 0
367	#define array_slim(type,stem) \	608	#define array_slim(type,stem) \
368	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	609	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
369	{ \	610	{ \
370	stem ## max = array_roundsize (stem ## cnt >> 1); \	611	stem ## max = array_roundsize (stem ## cnt >> 1); \
371	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	612	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
372	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	613	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
373	}	614	}
		615	#endif
374		616
375	#define array_free(stem, idx) \	617	#define array_free(stem, idx) \
376	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	618	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
377		619
378	/*****************************************************************************/	620	/*****************************************************************************/
379		621
380	static void	622	void noinline
		623	ev_feed_event (EV_P_ void *w, int revents)
		624	{
		625	W w_ = (W)w;
		626	int pri = ABSPRI (w_);
		627
		628	if (expect_false (w_->pending))
		629	pendings [pri][w_->pending - 1].events |= revents;
		630	else
		631	{
		632	w_->pending = ++pendingcnt [pri];
		633	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		634	pendings [pri][w_->pending - 1].w = w_;
		635	pendings [pri][w_->pending - 1].events = revents;
		636	}
		637	}
		638
		639	void inline_speed
		640	queue_events (EV_P_ W *events, int eventcnt, int type)
		641	{
		642	int i;
		643
		644	for (i = 0; i < eventcnt; ++i)
		645	ev_feed_event (EV_A_ events [i], type);
		646	}
		647
		648	/*****************************************************************************/
		649
		650	void inline_size
381	anfds_init (ANFD *base, int count)	651	anfds_init (ANFD *base, int count)
382	{	652	{
383	while (count--)	653	while (count--)
384	{	654	{
385	base->head = 0;	655	base->head = 0;
…		…
388		658
389	++base;	659	++base;
390	}	660	}
391	}	661	}
392		662
393	void	663	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)	664	fd_event (EV_P_ int fd, int revents)
421	{	665	{
422	ANFD *anfd = anfds + fd;	666	ANFD *anfd = anfds + fd;
423	struct ev_io *w;	667	ev_io *w;
424		668
425	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	669	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
426	{	670	{
427	int ev = w->events & revents;	671	int ev = w->events & revents;
428		672
429	if (ev)	673	if (ev)
430	ev_feed_event (EV_A_ (W)w, ev);	674	ev_feed_event (EV_A_ (W)w, ev);
…		…
432	}	676	}
433		677
434	void	678	void
435	ev_feed_fd_event (EV_P_ int fd, int revents)	679	ev_feed_fd_event (EV_P_ int fd, int revents)
436	{	680	{
		681	if (fd >= 0 && fd < anfdmax)
437	fd_event (EV_A_ fd, revents);	682	fd_event (EV_A_ fd, revents);
438	}	683	}
439		684
440	/*****************************************************************************/	685	void inline_size
441
442	inline void
443	fd_reify (EV_P)	686	fd_reify (EV_P)
444	{	687	{
445	int i;	688	int i;
446		689
447	for (i = 0; i < fdchangecnt; ++i)	690	for (i = 0; i < fdchangecnt; ++i)
448	{	691	{
449	int fd = fdchanges [i];	692	int fd = fdchanges [i];
450	ANFD *anfd = anfds + fd;	693	ANFD *anfd = anfds + fd;
451	struct ev_io *w;	694	ev_io *w;
452		695
453	int events = 0;	696	unsigned char events = 0;
454		697
455	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	698	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
456	events |= w->events;	699	events |= (unsigned char)w->events;
457		700
458	#if EV_SELECT_IS_WINSOCKET	701	#if EV_SELECT_IS_WINSOCKET
459	if (events)	702	if (events)
460	{	703	{
461	unsigned long argp;	704	unsigned long argp;
		705	#ifdef EV_FD_TO_WIN32_HANDLE
		706	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		707	#else
462	anfd->handle = _get_osfhandle (fd);	708	anfd->handle = _get_osfhandle (fd);
		709	#endif
463	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	710	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
464	}	711	}
465	#endif	712	#endif
466		713
		714	{
		715	unsigned char o_events = anfd->events;
		716	unsigned char o_reify = anfd->reify;
		717
467	anfd->reify = 0;	718	anfd->reify = 0;
468
469	method_modify (EV_A_ fd, anfd->events, events);
470	anfd->events = events;	719	anfd->events = events;
		720
		721	if (o_events != events || o_reify & EV_IOFDSET)
		722	backend_modify (EV_A_ fd, o_events, events);
		723	}
471	}	724	}
472		725
473	fdchangecnt = 0;	726	fdchangecnt = 0;
474	}	727	}
475		728
476	static void	729	void inline_size
477	fd_change (EV_P_ int fd)	730	fd_change (EV_P_ int fd, int flags)
478	{	731	{
479	if (expect_false (anfds [fd].reify))	732	unsigned char reify = anfds [fd].reify;
480	return;
481
482	anfds [fd].reify = 1;	733	anfds [fd].reify |= flags;
483		734
		735	if (expect_true (!reify))
		736	{
484	++fdchangecnt;	737	++fdchangecnt;
485	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	738	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
486	fdchanges [fdchangecnt - 1] = fd;	739	fdchanges [fdchangecnt - 1] = fd;
		740	}
487	}	741	}
488		742
489	static void	743	void inline_speed
490	fd_kill (EV_P_ int fd)	744	fd_kill (EV_P_ int fd)
491	{	745	{
492	struct ev_io *w;	746	ev_io *w;
493		747
494	while ((w = (struct ev_io *)anfds [fd].head))	748	while ((w = (ev_io *)anfds [fd].head))
495	{	749	{
496	ev_io_stop (EV_A_ w);	750	ev_io_stop (EV_A_ w);
497	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	751	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
498	}	752	}
499	}	753	}
500		754
501	inline int	755	int inline_size
502	fd_valid (int fd)	756	fd_valid (int fd)
503	{	757	{
504	#ifdef _WIN32	758	#ifdef _WIN32
505	return _get_osfhandle (fd) != -1;	759	return _get_osfhandle (fd) != -1;
506	#else	760	#else
507	return fcntl (fd, F_GETFD) != -1;	761	return fcntl (fd, F_GETFD) != -1;
508	#endif	762	#endif
509	}	763	}
510		764
511	/* called on EBADF to verify fds */	765	/* called on EBADF to verify fds */
512	static void	766	static void noinline
513	fd_ebadf (EV_P)	767	fd_ebadf (EV_P)
514	{	768	{
515	int fd;	769	int fd;
516		770
517	for (fd = 0; fd < anfdmax; ++fd)	771	for (fd = 0; fd < anfdmax; ++fd)
…		…
519	if (!fd_valid (fd) == -1 && errno == EBADF)	773	if (!fd_valid (fd) == -1 && errno == EBADF)
520	fd_kill (EV_A_ fd);	774	fd_kill (EV_A_ fd);
521	}	775	}
522		776
523	/* called on ENOMEM in select/poll to kill some fds and retry */	777	/* called on ENOMEM in select/poll to kill some fds and retry */
524	static void	778	static void noinline
525	fd_enomem (EV_P)	779	fd_enomem (EV_P)
526	{	780	{
527	int fd;	781	int fd;
528		782
529	for (fd = anfdmax; fd--; )	783	for (fd = anfdmax; fd--; )
…		…
532	fd_kill (EV_A_ fd);	786	fd_kill (EV_A_ fd);
533	return;	787	return;
534	}	788	}
535	}	789	}
536		790
537	/* usually called after fork if method needs to re-arm all fds from scratch */	791	/* usually called after fork if backend needs to re-arm all fds from scratch */
538	static void	792	static void noinline
539	fd_rearm_all (EV_P)	793	fd_rearm_all (EV_P)
540	{	794	{
541	int fd;	795	int fd;
542		796
543	/* this should be highly optimised to not do anything but set a flag */
544	for (fd = 0; fd < anfdmax; ++fd)	797	for (fd = 0; fd < anfdmax; ++fd)
545	if (anfds [fd].events)	798	if (anfds [fd].events)
546	{	799	{
547	anfds [fd].events = 0;	800	anfds [fd].events = 0;
548	fd_change (EV_A_ fd);	801	fd_change (EV_A_ fd, EV_IOFDSET | 1);
549	}	802	}
550	}	803	}
551		804
552	/*****************************************************************************/	805	/*****************************************************************************/
553		806
554	static void	807	/*
555	upheap (WT *heap, int k)	808	* the heap functions want a real array index. array index 0 uis guaranteed to not
556	{	809	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
557	WT w = heap [k];	810	* the branching factor of the d-tree.
		811	*/
558		812
559	while (k && heap [k >> 1]->at > w->at)	813	/*
560	{	814	* at the moment we allow libev the luxury of two heaps,
561	heap [k] = heap [k >> 1];	815	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
562	((W)heap [k])->active = k + 1;	816	* which is more cache-efficient.
563	k >>= 1;	817	* the difference is about 5% with 50000+ watchers.
564	}	818	*/
		819	#if EV_USE_4HEAP
565		820
566	heap [k] = w;	821	#define DHEAP 4
567	((W)heap [k])->active = k + 1;	822	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		823	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		824	#define UPHEAP_DONE(p,k) ((p) == (k))
568		825
569	}	826	/* away from the root */
570		827	void inline_speed
571	static void
572	downheap (WT *heap, int N, int k)	828	downheap (ANHE *heap, int N, int k)
573	{	829	{
574	WT w = heap [k];	830	ANHE he = heap [k];
		831	ANHE *E = heap + N + HEAP0;
575		832
576	while (k < (N >> 1))	833	for (;;)
577	{	834	{
578	int j = k << 1;	835	ev_tstamp minat;
		836	ANHE *minpos;
		837	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
579		838
580	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	839	/* find minimum child */
		840	if (expect_true (pos + DHEAP - 1 < E))
581	++j;	841	{
582		842	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
583	if (w->at <= heap [j]->at)	843	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		844	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		845	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		846	}
		847	else if (pos < E)
		848	{
		849	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		850	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		851	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		852	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		853	}
		854	else
584	break;	855	break;
585		856
		857	if (ANHE_at (he) <= minat)
		858	break;
		859
		860	heap [k] = *minpos;
		861	ev_active (ANHE_w (*minpos)) = k;
		862
		863	k = minpos - heap;
		864	}
		865
		866	heap [k] = he;
		867	ev_active (ANHE_w (he)) = k;
		868	}
		869
		870	#else /* 4HEAP */
		871
		872	#define HEAP0 1
		873	#define HPARENT(k) ((k) >> 1)
		874	#define UPHEAP_DONE(p,k) (!(p))
		875
		876	/* away from the root */
		877	void inline_speed
		878	downheap (ANHE *heap, int N, int k)
		879	{
		880	ANHE he = heap [k];
		881
		882	for (;;)
		883	{
		884	int c = k << 1;
		885
		886	if (c > N + HEAP0 - 1)
		887	break;
		888
		889	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		890	? 1 : 0;
		891
		892	if (ANHE_at (he) <= ANHE_at (heap [c]))
		893	break;
		894
586	heap [k] = heap [j];	895	heap [k] = heap [c];
587	((W)heap [k])->active = k + 1;	896	ev_active (ANHE_w (heap [k])) = k;
		897
588	k = j;	898	k = c;
589	}	899	}
590		900
591	heap [k] = w;	901	heap [k] = he;
592	((W)heap [k])->active = k + 1;	902	ev_active (ANHE_w (he)) = k;
593	}	903	}
		904	#endif
594		905
595	inline void	906	/* towards the root */
		907	void inline_speed
		908	upheap (ANHE *heap, int k)
		909	{
		910	ANHE he = heap [k];
		911
		912	for (;;)
		913	{
		914	int p = HPARENT (k);
		915
		916	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		917	break;
		918
		919	heap [k] = heap [p];
		920	ev_active (ANHE_w (heap [k])) = k;
		921	k = p;
		922	}
		923
		924	heap [k] = he;
		925	ev_active (ANHE_w (he)) = k;
		926	}
		927
		928	void inline_size
596	adjustheap (WT *heap, int N, int k)	929	adjustheap (ANHE *heap, int N, int k)
597	{	930	{
		931	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
598	upheap (heap, k);	932	upheap (heap, k);
		933	else
599	downheap (heap, N, k);	934	downheap (heap, N, k);
		935	}
		936
		937	/* rebuild the heap: this function is used only once and executed rarely */
		938	void inline_size
		939	reheap (ANHE *heap, int N)
		940	{
		941	int i;
		942
		943	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		944	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		945	for (i = 0; i < N; ++i)
		946	upheap (heap, i + HEAP0);
600	}	947	}
601		948
602	/*****************************************************************************/	949	/*****************************************************************************/
603		950
604	typedef struct	951	typedef struct
605	{	952	{
606	WL head;	953	WL head;
607	sig_atomic_t volatile gotsig;	954	EV_ATOMIC_T gotsig;
608	} ANSIG;	955	} ANSIG;
609		956
610	static ANSIG *signals;	957	static ANSIG *signals;
611	static int signalmax;	958	static int signalmax;
612		959
613	static int sigpipe [2];	960	static EV_ATOMIC_T gotsig;
614	static sig_atomic_t volatile gotsig;
615	static struct ev_io sigev;
616		961
617	static void	962	void inline_size
618	signals_init (ANSIG *base, int count)	963	signals_init (ANSIG *base, int count)
619	{	964	{
620	while (count--)	965	while (count--)
621	{	966	{
622	base->head = 0;	967	base->head = 0;
…		…
624		969
625	++base;	970	++base;
626	}	971	}
627	}	972	}
628		973
629	static void	974	/*****************************************************************************/
630	sighandler (int signum)
631	{
632	#if _WIN32
633	signal (signum, sighandler);
634	#endif
635		975
636	signals [signum - 1].gotsig = 1;	976	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)	977	fd_intern (int fd)
682	{	978	{
683	#ifdef _WIN32	979	#ifdef _WIN32
684	int arg = 1;	980	int arg = 1;
685	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	981	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
687	fcntl (fd, F_SETFD, FD_CLOEXEC);	983	fcntl (fd, F_SETFD, FD_CLOEXEC);
688	fcntl (fd, F_SETFL, O_NONBLOCK);	984	fcntl (fd, F_SETFL, O_NONBLOCK);
689	#endif	985	#endif
690	}	986	}
691		987
		988	static void noinline
		989	evpipe_init (EV_P)
		990	{
		991	if (!ev_is_active (&pipeev))
		992	{
		993	#if EV_USE_EVENTFD
		994	if ((evfd = eventfd (0, 0)) >= 0)
		995	{
		996	evpipe [0] = -1;
		997	fd_intern (evfd);
		998	ev_io_set (&pipeev, evfd, EV_READ);
		999	}
		1000	else
		1001	#endif
		1002	{
		1003	while (pipe (evpipe))
		1004	syserr ("(libev) error creating signal/async pipe");
		1005
		1006	fd_intern (evpipe [0]);
		1007	fd_intern (evpipe [1]);
		1008	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1009	}
		1010
		1011	ev_io_start (EV_A_ &pipeev);
		1012	ev_unref (EV_A); /* watcher should not keep loop alive */
		1013	}
		1014	}
		1015
		1016	void inline_size
		1017	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1018	{
		1019	if (!*flag)
		1020	{
		1021	int old_errno = errno; /* save errno because write might clobber it */
		1022
		1023	*flag = 1;
		1024
		1025	#if EV_USE_EVENTFD
		1026	if (evfd >= 0)
		1027	{
		1028	uint64_t counter = 1;
		1029	write (evfd, &counter, sizeof (uint64_t));
		1030	}
		1031	else
		1032	#endif
		1033	write (evpipe [1], &old_errno, 1);
		1034
		1035	errno = old_errno;
		1036	}
		1037	}
		1038
692	static void	1039	static void
693	siginit (EV_P)	1040	pipecb (EV_P_ ev_io *iow, int revents)
694	{	1041	{
695	fd_intern (sigpipe [0]);	1042	#if EV_USE_EVENTFD
696	fd_intern (sigpipe [1]);	1043	if (evfd >= 0)
		1044	{
		1045	uint64_t counter;
		1046	read (evfd, &counter, sizeof (uint64_t));
		1047	}
		1048	else
		1049	#endif
		1050	{
		1051	char dummy;
		1052	read (evpipe [0], &dummy, 1);
		1053	}
697		1054
698	ev_io_set (&sigev, sigpipe [0], EV_READ);	1055	if (gotsig && ev_is_default_loop (EV_A))
699	ev_io_start (EV_A_ &sigev);	1056	{
700	ev_unref (EV_A); /* child watcher should not keep loop alive */	1057	int signum;
		1058	gotsig = 0;
		1059
		1060	for (signum = signalmax; signum--; )
		1061	if (signals [signum].gotsig)
		1062	ev_feed_signal_event (EV_A_ signum + 1);
		1063	}
		1064
		1065	#if EV_ASYNC_ENABLE
		1066	if (gotasync)
		1067	{
		1068	int i;
		1069	gotasync = 0;
		1070
		1071	for (i = asynccnt; i--; )
		1072	if (asyncs [i]->sent)
		1073	{
		1074	asyncs [i]->sent = 0;
		1075	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1076	}
		1077	}
		1078	#endif
701	}	1079	}
702		1080
703	/*****************************************************************************/	1081	/*****************************************************************************/
704		1082
705	static struct ev_child *childs [PID_HASHSIZE];	1083	static void
		1084	ev_sighandler (int signum)
		1085	{
		1086	#if EV_MULTIPLICITY
		1087	struct ev_loop *loop = &default_loop_struct;
		1088	#endif
		1089
		1090	#if _WIN32
		1091	signal (signum, ev_sighandler);
		1092	#endif
		1093
		1094	signals [signum - 1].gotsig = 1;
		1095	evpipe_write (EV_A_ &gotsig);
		1096	}
		1097
		1098	void noinline
		1099	ev_feed_signal_event (EV_P_ int signum)
		1100	{
		1101	WL w;
		1102
		1103	#if EV_MULTIPLICITY
		1104	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1105	#endif
		1106
		1107	--signum;
		1108
		1109	if (signum < 0 || signum >= signalmax)
		1110	return;
		1111
		1112	signals [signum].gotsig = 0;
		1113
		1114	for (w = signals [signum].head; w; w = w->next)
		1115	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1116	}
		1117
		1118	/*****************************************************************************/
		1119
		1120	static WL childs [EV_PID_HASHSIZE];
706		1121
707	#ifndef _WIN32	1122	#ifndef _WIN32
708		1123
709	static struct ev_signal childev;	1124	static ev_signal childev;
		1125
		1126	#ifndef WIFCONTINUED
		1127	# define WIFCONTINUED(status) 0
		1128	#endif
		1129
		1130	void inline_speed
		1131	child_reap (EV_P_ int chain, int pid, int status)
		1132	{
		1133	ev_child *w;
		1134	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1135
		1136	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1137	{
		1138	if ((w->pid == pid || !w->pid)
		1139	&& (!traced || (w->flags & 1)))
		1140	{
		1141	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1142	w->rpid = pid;
		1143	w->rstatus = status;
		1144	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1145	}
		1146	}
		1147	}
710		1148
711	#ifndef WCONTINUED	1149	#ifndef WCONTINUED
712	# define WCONTINUED 0	1150	# define WCONTINUED 0
713	#endif	1151	#endif
714		1152
715	static void	1153	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)	1154	childcb (EV_P_ ev_signal *sw, int revents)
732	{	1155	{
733	int pid, status;	1156	int pid, status;
734		1157
		1158	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
735	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1159	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
736	{	1160	if (!WCONTINUED
		1161	|| errno != EINVAL
		1162	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1163	return;
		1164
737	/* make sure we are called again until all childs have been reaped */	1165	/* make sure we are called again until all children have been reaped */
		1166	/* 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);	1167	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
739		1168
740	child_reap (EV_A_ sw, pid, pid, status);	1169	child_reap (EV_A_ pid, pid, status);
		1170	if (EV_PID_HASHSIZE > 1)
741	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1171	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
742	}
743	}	1172	}
744		1173
745	#endif	1174	#endif
746		1175
747	/*****************************************************************************/	1176	/*****************************************************************************/
…		…
773	{	1202	{
774	return EV_VERSION_MINOR;	1203	return EV_VERSION_MINOR;
775	}	1204	}
776		1205
777	/* return true if we are running with elevated privileges and should ignore env variables */	1206	/* return true if we are running with elevated privileges and should ignore env variables */
778	static int	1207	int inline_size
779	enable_secure (void)	1208	enable_secure (void)
780	{	1209	{
781	#ifdef _WIN32	1210	#ifdef _WIN32
782	return 0;	1211	return 0;
783	#else	1212	#else
…		…
785	|| getgid () != getegid ();	1214	|| getgid () != getegid ();
786	#endif	1215	#endif
787	}	1216	}
788		1217
789	unsigned int	1218	unsigned int
790	ev_method (EV_P)	1219	ev_supported_backends (void)
791	{	1220	{
792	return method;	1221	unsigned int flags = 0;
793	}
794		1222
795	static void	1223	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1224	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1225	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1226	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1227	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1228
		1229	return flags;
		1230	}
		1231
		1232	unsigned int
		1233	ev_recommended_backends (void)
		1234	{
		1235	unsigned int flags = ev_supported_backends ();
		1236
		1237	#ifndef __NetBSD__
		1238	/* kqueue is borked on everything but netbsd apparently */
		1239	/* it usually doesn't work correctly on anything but sockets and pipes */
		1240	flags &= ~EVBACKEND_KQUEUE;
		1241	#endif
		1242	#ifdef __APPLE__
		1243	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1244	flags &= ~EVBACKEND_POLL;
		1245	#endif
		1246
		1247	return flags;
		1248	}
		1249
		1250	unsigned int
		1251	ev_embeddable_backends (void)
		1252	{
		1253	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1254
		1255	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1256	/* please fix it and tell me how to detect the fix */
		1257	flags &= ~EVBACKEND_EPOLL;
		1258
		1259	return flags;
		1260	}
		1261
		1262	unsigned int
		1263	ev_backend (EV_P)
		1264	{
		1265	return backend;
		1266	}
		1267
		1268	unsigned int
		1269	ev_loop_count (EV_P)
		1270	{
		1271	return loop_count;
		1272	}
		1273
		1274	void
		1275	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1276	{
		1277	io_blocktime = interval;
		1278	}
		1279
		1280	void
		1281	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1282	{
		1283	timeout_blocktime = interval;
		1284	}
		1285
		1286	static void noinline
796	loop_init (EV_P_ unsigned int flags)	1287	loop_init (EV_P_ unsigned int flags)
797	{	1288	{
798	if (!method)	1289	if (!backend)
799	{	1290	{
800	#if EV_USE_MONOTONIC	1291	#if EV_USE_MONOTONIC
801	{	1292	{
802	struct timespec ts;	1293	struct timespec ts;
803	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1294	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
804	have_monotonic = 1;	1295	have_monotonic = 1;
805	}	1296	}
806	#endif	1297	#endif
807		1298
808	ev_rt_now = ev_time ();	1299	ev_rt_now = ev_time ();
809	mn_now = get_clock ();	1300	mn_now = get_clock ();
810	now_floor = mn_now;	1301	now_floor = mn_now;
811	rtmn_diff = ev_rt_now - mn_now;	1302	rtmn_diff = ev_rt_now - mn_now;
812		1303
813	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))	1304	io_blocktime = 0.;
		1305	timeout_blocktime = 0.;
		1306	backend = 0;
		1307	backend_fd = -1;
		1308	gotasync = 0;
		1309	#if EV_USE_INOTIFY
		1310	fs_fd = -2;
		1311	#endif
		1312
		1313	/* pid check not overridable via env */
		1314	#ifndef _WIN32
		1315	if (flags & EVFLAG_FORKCHECK)
		1316	curpid = getpid ();
		1317	#endif
		1318
		1319	if (!(flags & EVFLAG_NOENV)
		1320	&& !enable_secure ()
		1321	&& getenv ("LIBEV_FLAGS"))
814	flags = atoi (getenv ("LIBEV_FLAGS"));	1322	flags = atoi (getenv ("LIBEV_FLAGS"));
815		1323
816	if (!(flags & 0x0000ffff))	1324	if (!(flags & 0x0000ffffU))
817	flags |= 0x0000ffff;	1325	flags |= ev_recommended_backends ();
818		1326
819	method = 0;
820	#if EV_USE_PORT	1327	#if EV_USE_PORT
821	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);	1328	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
822	#endif	1329	#endif
823	#if EV_USE_KQUEUE	1330	#if EV_USE_KQUEUE
824	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);	1331	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
825	#endif	1332	#endif
826	#if EV_USE_EPOLL	1333	#if EV_USE_EPOLL
827	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);	1334	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
828	#endif	1335	#endif
829	#if EV_USE_POLL	1336	#if EV_USE_POLL
830	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);	1337	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
831	#endif	1338	#endif
832	#if EV_USE_SELECT	1339	#if EV_USE_SELECT
833	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);	1340	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
834	#endif	1341	#endif
835		1342
836	ev_init (&sigev, sigcb);	1343	ev_init (&pipeev, pipecb);
837	ev_set_priority (&sigev, EV_MAXPRI);	1344	ev_set_priority (&pipeev, EV_MAXPRI);
838	}	1345	}
839	}	1346	}
840		1347
841	static void	1348	static void noinline
842	loop_destroy (EV_P)	1349	loop_destroy (EV_P)
843	{	1350	{
844	int i;	1351	int i;
845		1352
		1353	if (ev_is_active (&pipeev))
		1354	{
		1355	ev_ref (EV_A); /* signal watcher */
		1356	ev_io_stop (EV_A_ &pipeev);
		1357
		1358	#if EV_USE_EVENTFD
		1359	if (evfd >= 0)
		1360	close (evfd);
		1361	#endif
		1362
		1363	if (evpipe [0] >= 0)
		1364	{
		1365	close (evpipe [0]);
		1366	close (evpipe [1]);
		1367	}
		1368	}
		1369
		1370	#if EV_USE_INOTIFY
		1371	if (fs_fd >= 0)
		1372	close (fs_fd);
		1373	#endif
		1374
		1375	if (backend_fd >= 0)
		1376	close (backend_fd);
		1377
846	#if EV_USE_PORT	1378	#if EV_USE_PORT
847	if (method == EVMETHOD_PORT ) port_destroy (EV_A);	1379	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
848	#endif	1380	#endif
849	#if EV_USE_KQUEUE	1381	#if EV_USE_KQUEUE
850	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1382	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
851	#endif	1383	#endif
852	#if EV_USE_EPOLL	1384	#if EV_USE_EPOLL
853	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1385	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
854	#endif	1386	#endif
855	#if EV_USE_POLL	1387	#if EV_USE_POLL
856	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1388	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
857	#endif	1389	#endif
858	#if EV_USE_SELECT	1390	#if EV_USE_SELECT
859	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1391	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
860	#endif	1392	#endif
861		1393
862	for (i = NUMPRI; i--; )	1394	for (i = NUMPRI; i--; )
		1395	{
863	array_free (pending, [i]);	1396	array_free (pending, [i]);
		1397	#if EV_IDLE_ENABLE
		1398	array_free (idle, [i]);
		1399	#endif
		1400	}
		1401
		1402	ev_free (anfds); anfdmax = 0;
864		1403
865	/* have to use the microsoft-never-gets-it-right macro */	1404	/* have to use the microsoft-never-gets-it-right macro */
866	array_free (fdchange, EMPTY0);	1405	array_free (fdchange, EMPTY);
867	array_free (timer, EMPTY0);	1406	array_free (timer, EMPTY);
868	#if EV_PERIODICS	1407	#if EV_PERIODIC_ENABLE
869	array_free (periodic, EMPTY0);	1408	array_free (periodic, EMPTY);
870	#endif	1409	#endif
		1410	#if EV_FORK_ENABLE
871	array_free (idle, EMPTY0);	1411	array_free (fork, EMPTY);
		1412	#endif
872	array_free (prepare, EMPTY0);	1413	array_free (prepare, EMPTY);
873	array_free (check, EMPTY0);	1414	array_free (check, EMPTY);
		1415	#if EV_ASYNC_ENABLE
		1416	array_free (async, EMPTY);
		1417	#endif
874		1418
875	method = 0;	1419	backend = 0;
876	}	1420	}
877		1421
878	static void	1422	#if EV_USE_INOTIFY
		1423	void inline_size infy_fork (EV_P);
		1424	#endif
		1425
		1426	void inline_size
879	loop_fork (EV_P)	1427	loop_fork (EV_P)
880	{	1428	{
881	#if EV_USE_PORT	1429	#if EV_USE_PORT
882	if (method == EVMETHOD_PORT ) port_fork (EV_A);	1430	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
883	#endif	1431	#endif
884	#if EV_USE_KQUEUE	1432	#if EV_USE_KQUEUE
885	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1433	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
886	#endif	1434	#endif
887	#if EV_USE_EPOLL	1435	#if EV_USE_EPOLL
888	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1436	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
889	#endif	1437	#endif
		1438	#if EV_USE_INOTIFY
		1439	infy_fork (EV_A);
		1440	#endif
890		1441
891	if (ev_is_active (&sigev))	1442	if (ev_is_active (&pipeev))
892	{	1443	{
893	/* default loop */	1444	/* this "locks" the handlers against writing to the pipe */
		1445	/* while we modify the fd vars */
		1446	gotsig = 1;
		1447	#if EV_ASYNC_ENABLE
		1448	gotasync = 1;
		1449	#endif
894		1450
895	ev_ref (EV_A);	1451	ev_ref (EV_A);
896	ev_io_stop (EV_A_ &sigev);	1452	ev_io_stop (EV_A_ &pipeev);
		1453
		1454	#if EV_USE_EVENTFD
		1455	if (evfd >= 0)
		1456	close (evfd);
		1457	#endif
		1458
		1459	if (evpipe [0] >= 0)
		1460	{
897	close (sigpipe [0]);	1461	close (evpipe [0]);
898	close (sigpipe [1]);	1462	close (evpipe [1]);
		1463	}
899		1464
900	while (pipe (sigpipe))
901	syserr ("(libev) error creating pipe");
902
903	siginit (EV_A);	1465	evpipe_init (EV_A);
		1466	/* now iterate over everything, in case we missed something */
		1467	pipecb (EV_A_ &pipeev, EV_READ);
904	}	1468	}
905		1469
906	postfork = 0;	1470	postfork = 0;
907	}	1471	}
908		1472
909	#if EV_MULTIPLICITY	1473	#if EV_MULTIPLICITY
		1474
910	struct ev_loop *	1475	struct ev_loop *
911	ev_loop_new (unsigned int flags)	1476	ev_loop_new (unsigned int flags)
912	{	1477	{
913	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1478	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
914		1479
915	memset (loop, 0, sizeof (struct ev_loop));	1480	memset (loop, 0, sizeof (struct ev_loop));
916		1481
917	loop_init (EV_A_ flags);	1482	loop_init (EV_A_ flags);
918		1483
919	if (ev_method (EV_A))	1484	if (ev_backend (EV_A))
920	return loop;	1485	return loop;
921		1486
922	return 0;	1487	return 0;
923	}	1488	}
924		1489
…		…
930	}	1495	}
931		1496
932	void	1497	void
933	ev_loop_fork (EV_P)	1498	ev_loop_fork (EV_P)
934	{	1499	{
935	postfork = 1;	1500	postfork = 1; /* must be in line with ev_default_fork */
936	}	1501	}
937		1502
		1503	#if EV_VERIFY
		1504	void noinline
		1505	verify_watcher (EV_P_ W w)
		1506	{
		1507	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1508
		1509	if (w->pending)
		1510	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1511	}
		1512
		1513	static void noinline
		1514	verify_heap (EV_P_ ANHE *heap, int N)
		1515	{
		1516	int i;
		1517
		1518	for (i = HEAP0; i < N + HEAP0; ++i)
		1519	{
		1520	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1521	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1522	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1523
		1524	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1525	}
		1526	}
		1527
		1528	static void noinline
		1529	array_verify (EV_P_ W *ws, int cnt)
		1530	{
		1531	while (cnt--)
		1532	{
		1533	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1534	verify_watcher (EV_A_ ws [cnt]);
		1535	}
		1536	}
		1537	#endif
		1538
		1539	void
		1540	ev_loop_verify (EV_P)
		1541	{
		1542	#if EV_VERIFY
		1543	int i;
		1544	WL w;
		1545
		1546	assert (activecnt >= -1);
		1547
		1548	assert (fdchangemax >= fdchangecnt);
		1549	for (i = 0; i < fdchangecnt; ++i)
		1550	assert (("negative fd in fdchanges", fdchanges [i] >= 0));
		1551
		1552	assert (anfdmax >= 0);
		1553	for (i = 0; i < anfdmax; ++i)
		1554	for (w = anfds [i].head; w; w = w->next)
		1555	{
		1556	verify_watcher (EV_A_ (W)w);
		1557	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
		1558	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1559	}
		1560
		1561	assert (timermax >= timercnt);
		1562	verify_heap (EV_A_ timers, timercnt);
		1563
		1564	#if EV_PERIODIC_ENABLE
		1565	assert (periodicmax >= periodiccnt);
		1566	verify_heap (EV_A_ periodics, periodiccnt);
		1567	#endif
		1568
		1569	for (i = NUMPRI; i--; )
		1570	{
		1571	assert (pendingmax [i] >= pendingcnt [i]);
		1572	#if EV_IDLE_ENABLE
		1573	assert (idleall >= 0);
		1574	assert (idlemax [i] >= idlecnt [i]);
		1575	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1576	#endif
		1577	}
		1578
		1579	#if EV_FORK_ENABLE
		1580	assert (forkmax >= forkcnt);
		1581	array_verify (EV_A_ (W *)forks, forkcnt);
		1582	#endif
		1583
		1584	#if EV_ASYNC_ENABLE
		1585	assert (asyncmax >= asynccnt);
		1586	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1587	#endif
		1588
		1589	assert (preparemax >= preparecnt);
		1590	array_verify (EV_A_ (W *)prepares, preparecnt);
		1591
		1592	assert (checkmax >= checkcnt);
		1593	array_verify (EV_A_ (W *)checks, checkcnt);
		1594
		1595	# if 0
		1596	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1597	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
938	#endif	1598	# endif
		1599	#endif
		1600	}
		1601
		1602	#endif /* multiplicity */
939		1603
940	#if EV_MULTIPLICITY	1604	#if EV_MULTIPLICITY
941	struct ev_loop *	1605	struct ev_loop *
942	ev_default_loop_init (unsigned int flags)	1606	ev_default_loop_init (unsigned int flags)
943	#else	1607	#else
944	int	1608	int
945	ev_default_loop (unsigned int flags)	1609	ev_default_loop (unsigned int flags)
946	#endif	1610	#endif
947	{	1611	{
948	if (sigpipe [0] == sigpipe [1])
949	if (pipe (sigpipe))
950	return 0;
951
952	if (!ev_default_loop_ptr)	1612	if (!ev_default_loop_ptr)
953	{	1613	{
954	#if EV_MULTIPLICITY	1614	#if EV_MULTIPLICITY
955	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1615	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
956	#else	1616	#else
957	ev_default_loop_ptr = 1;	1617	ev_default_loop_ptr = 1;
958	#endif	1618	#endif
959		1619
960	loop_init (EV_A_ flags);	1620	loop_init (EV_A_ flags);
961		1621
962	if (ev_method (EV_A))	1622	if (ev_backend (EV_A))
963	{	1623	{
964	siginit (EV_A);
965
966	#ifndef _WIN32	1624	#ifndef _WIN32
967	ev_signal_init (&childev, childcb, SIGCHLD);	1625	ev_signal_init (&childev, childcb, SIGCHLD);
968	ev_set_priority (&childev, EV_MAXPRI);	1626	ev_set_priority (&childev, EV_MAXPRI);
969	ev_signal_start (EV_A_ &childev);	1627	ev_signal_start (EV_A_ &childev);
970	ev_unref (EV_A); /* child watcher should not keep loop alive */	1628	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
987	#ifndef _WIN32	1645	#ifndef _WIN32
988	ev_ref (EV_A); /* child watcher */	1646	ev_ref (EV_A); /* child watcher */
989	ev_signal_stop (EV_A_ &childev);	1647	ev_signal_stop (EV_A_ &childev);
990	#endif	1648	#endif
991		1649
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);	1650	loop_destroy (EV_A);
999	}	1651	}
1000		1652
1001	void	1653	void
1002	ev_default_fork (void)	1654	ev_default_fork (void)
1003	{	1655	{
1004	#if EV_MULTIPLICITY	1656	#if EV_MULTIPLICITY
1005	struct ev_loop *loop = ev_default_loop_ptr;	1657	struct ev_loop *loop = ev_default_loop_ptr;
1006	#endif	1658	#endif
1007		1659
1008	if (method)	1660	if (backend)
1009	postfork = 1;	1661	postfork = 1; /* must be in line with ev_loop_fork */
1010	}	1662	}
1011		1663
1012	/*****************************************************************************/	1664	/*****************************************************************************/
1013		1665
1014	static int	1666	void
1015	any_pending (EV_P)	1667	ev_invoke (EV_P_ void *w, int revents)
1016	{	1668	{
1017	int pri;	1669	EV_CB_INVOKE ((W)w, revents);
1018
1019	for (pri = NUMPRI; pri--; )
1020	if (pendingcnt [pri])
1021	return 1;
1022
1023	return 0;
1024	}	1670	}
1025		1671
1026	inline void	1672	void inline_speed
1027	call_pending (EV_P)	1673	call_pending (EV_P)
1028	{	1674	{
1029	int pri;	1675	int pri;
1030		1676
1031	for (pri = NUMPRI; pri--; )	1677	for (pri = NUMPRI; pri--; )
…		…
1033	{	1679	{
1034	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1035		1681
1036	if (expect_true (p->w))	1682	if (expect_true (p->w))
1037	{	1683	{
		1684	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1685
1038	p->w->pending = 0;	1686	p->w->pending = 0;
1039	EV_CB_INVOKE (p->w, p->events);	1687	EV_CB_INVOKE (p->w, p->events);
		1688	EV_FREQUENT_CHECK;
1040	}	1689	}
1041	}	1690	}
1042	}	1691	}
1043		1692
1044	inline void	1693	#if EV_IDLE_ENABLE
		1694	void inline_size
		1695	idle_reify (EV_P)
		1696	{
		1697	if (expect_false (idleall))
		1698	{
		1699	int pri;
		1700
		1701	for (pri = NUMPRI; pri--; )
		1702	{
		1703	if (pendingcnt [pri])
		1704	break;
		1705
		1706	if (idlecnt [pri])
		1707	{
		1708	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1709	break;
		1710	}
		1711	}
		1712	}
		1713	}
		1714	#endif
		1715
		1716	void inline_size
1045	timers_reify (EV_P)	1717	timers_reify (EV_P)
1046	{	1718	{
		1719	EV_FREQUENT_CHECK;
		1720
1047	while (timercnt && ((WT)timers [0])->at <= mn_now)	1721	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1048	{	1722	{
1049	struct ev_timer *w = timers [0];	1723	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1050		1724
1051	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1725	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1052		1726
1053	/* first reschedule or stop timer */	1727	/* first reschedule or stop timer */
1054	if (w->repeat)	1728	if (w->repeat)
1055	{	1729	{
		1730	ev_at (w) += w->repeat;
		1731	if (ev_at (w) < mn_now)
		1732	ev_at (w) = mn_now;
		1733
1056	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1734	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1057		1735
1058	((WT)w)->at += w->repeat;	1736	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);	1737	downheap (timers, timercnt, HEAP0);
1063	}	1738	}
1064	else	1739	else
1065	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1740	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1066		1741
		1742	EV_FREQUENT_CHECK;
1067	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1743	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1068	}	1744	}
1069	}	1745	}
1070		1746
1071	#if EV_PERIODICS	1747	#if EV_PERIODIC_ENABLE
1072	inline void	1748	void inline_size
1073	periodics_reify (EV_P)	1749	periodics_reify (EV_P)
1074	{	1750	{
		1751	EV_FREQUENT_CHECK;
		1752
1075	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1753	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1076	{	1754	{
1077	struct ev_periodic *w = periodics [0];	1755	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1078		1756
1079	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1757	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1080		1758
1081	/* first reschedule or stop timer */	1759	/* first reschedule or stop timer */
1082	if (w->reschedule_cb)	1760	if (w->reschedule_cb)
1083	{	1761	{
1084	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1762	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1763
1085	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1764	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1765
		1766	ANHE_at_cache (periodics [HEAP0]);
1086	downheap ((WT *)periodics, periodiccnt, 0);	1767	downheap (periodics, periodiccnt, HEAP0);
1087	}	1768	}
1088	else if (w->interval)	1769	else if (w->interval)
1089	{	1770	{
1090	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1771	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));	1772	/* if next trigger time is not sufficiently in the future, put it there */
		1773	/* this might happen because of floating point inexactness */
		1774	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1775	{
		1776	ev_at (w) += w->interval;
		1777
		1778	/* if interval is unreasonably low we might still have a time in the past */
		1779	/* so correct this. this will make the periodic very inexact, but the user */
		1780	/* has effectively asked to get triggered more often than possible */
		1781	if (ev_at (w) < ev_rt_now)
		1782	ev_at (w) = ev_rt_now;
		1783	}
		1784
		1785	ANHE_at_cache (periodics [HEAP0]);
1092	downheap ((WT *)periodics, periodiccnt, 0);	1786	downheap (periodics, periodiccnt, HEAP0);
1093	}	1787	}
1094	else	1788	else
1095	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1789	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1096		1790
		1791	EV_FREQUENT_CHECK;
1097	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1792	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1098	}	1793	}
1099	}	1794	}
1100		1795
1101	static void	1796	static void noinline
1102	periodics_reschedule (EV_P)	1797	periodics_reschedule (EV_P)
1103	{	1798	{
1104	int i;	1799	int i;
1105		1800
1106	/* adjust periodics after time jump */	1801	/* adjust periodics after time jump */
1107	for (i = 0; i < periodiccnt; ++i)	1802	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1108	{	1803	{
1109	struct ev_periodic *w = periodics [i];	1804	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1110		1805
1111	if (w->reschedule_cb)	1806	if (w->reschedule_cb)
1112	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1807	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1113	else if (w->interval)	1808	else if (w->interval)
1114	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1809	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1810
		1811	ANHE_at_cache (periodics [i]);
		1812	}
		1813
		1814	reheap (periodics, periodiccnt);
		1815	}
		1816	#endif
		1817
		1818	void inline_speed
		1819	time_update (EV_P_ ev_tstamp max_block)
		1820	{
		1821	int i;
		1822
		1823	#if EV_USE_MONOTONIC
		1824	if (expect_true (have_monotonic))
1115	}	1825	{
		1826	ev_tstamp odiff = rtmn_diff;
1116		1827
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 ();	1828	mn_now = get_clock ();
1127		1829
		1830	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1831	/* interpolate in the meantime */
1128	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1832	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1129	{	1833	{
1130	ev_rt_now = rtmn_diff + mn_now;	1834	ev_rt_now = rtmn_diff + mn_now;
1131	return 0;	1835	return;
1132	}	1836	}
1133	else	1837
1134	{
1135	now_floor = mn_now;	1838	now_floor = mn_now;
1136	ev_rt_now = ev_time ();	1839	ev_rt_now = ev_time ();
1137	return 1;
1138	}
1139	}
1140		1840
1141	inline void	1841	/* loop a few times, before making important decisions.
1142	time_update (EV_P)	1842	* on the choice of "4": one iteration isn't enough,
1143	{	1843	* in case we get preempted during the calls to
1144	int i;	1844	* ev_time and get_clock. a second call is almost guaranteed
1145		1845	* to succeed in that case, though. and looping a few more times
1146	#if EV_USE_MONOTONIC	1846	* doesn't hurt either as we only do this on time-jumps or
1147	if (expect_true (have_monotonic))	1847	* in the unlikely event of having been preempted here.
1148	{	1848	*/
1149	if (time_update_monotonic (EV_A))	1849	for (i = 4; --i; )
1150	{	1850	{
1151	ev_tstamp odiff = rtmn_diff;	1851	rtmn_diff = ev_rt_now - mn_now;
1152		1852
1153	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1853	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1854	return; /* all is well */
		1855
		1856	ev_rt_now = ev_time ();
		1857	mn_now = get_clock ();
		1858	now_floor = mn_now;
		1859	}
		1860
		1861	# if EV_PERIODIC_ENABLE
		1862	periodics_reschedule (EV_A);
		1863	# endif
		1864	/* no timer adjustment, as the monotonic clock doesn't jump */
		1865	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1866	}
		1867	else
		1868	#endif
		1869	{
		1870	ev_rt_now = ev_time ();
		1871
		1872	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1873	{
		1874	#if EV_PERIODIC_ENABLE
		1875	periodics_reschedule (EV_A);
		1876	#endif
		1877	/* adjust timers. this is easy, as the offset is the same for all of them */
		1878	for (i = 0; i < timercnt; ++i)
1154	{	1879	{
1155	rtmn_diff = ev_rt_now - mn_now;	1880	ANHE *he = timers + i + HEAP0;
1156		1881	ANHE_w (*he)->at += ev_rt_now - mn_now;
1157	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1882	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	}	1883	}
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	}	1884	}
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		1885
1188	mn_now = ev_rt_now;	1886	mn_now = ev_rt_now;
1189	}	1887	}
1190	}	1888	}
1191		1889
…		…
1204	static int loop_done;	1902	static int loop_done;
1205		1903
1206	void	1904	void
1207	ev_loop (EV_P_ int flags)	1905	ev_loop (EV_P_ int flags)
1208	{	1906	{
1209	double block;	1907	loop_done = EVUNLOOP_CANCEL;
1210	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1211		1908
1212	while (activecnt)	1909	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1910
		1911	do
1213	{	1912	{
		1913	#if EV_VERIFY >= 2
		1914	ev_loop_verify (EV_A);
		1915	#endif
		1916
		1917	#ifndef _WIN32
		1918	if (expect_false (curpid)) /* penalise the forking check even more */
		1919	if (expect_false (getpid () != curpid))
		1920	{
		1921	curpid = getpid ();
		1922	postfork = 1;
		1923	}
		1924	#endif
		1925
		1926	#if EV_FORK_ENABLE
		1927	/* we might have forked, so queue fork handlers */
		1928	if (expect_false (postfork))
		1929	if (forkcnt)
		1930	{
		1931	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1932	call_pending (EV_A);
		1933	}
		1934	#endif
		1935
1214	/* queue check watchers (and execute them) */	1936	/* queue prepare watchers (and execute them) */
1215	if (expect_false (preparecnt))	1937	if (expect_false (preparecnt))
1216	{	1938	{
1217	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1939	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1218	call_pending (EV_A);	1940	call_pending (EV_A);
1219	}	1941	}
1220		1942
		1943	if (expect_false (!activecnt))
		1944	break;
		1945
1221	/* we might have forked, so reify kernel state if necessary */	1946	/* we might have forked, so reify kernel state if necessary */
1222	if (expect_false (postfork))	1947	if (expect_false (postfork))
1223	loop_fork (EV_A);	1948	loop_fork (EV_A);
1224		1949
1225	/* update fd-related kernel structures */	1950	/* update fd-related kernel structures */
1226	fd_reify (EV_A);	1951	fd_reify (EV_A);
1227		1952
1228	/* calculate blocking time */	1953	/* calculate blocking time */
		1954	{
		1955	ev_tstamp waittime = 0.;
		1956	ev_tstamp sleeptime = 0.;
1229		1957
1230	/* we only need this for !monotonic clock or timers, but as we basically	1958	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	{	1959	{
1238	ev_rt_now = ev_time ();	1960	/* update time to cancel out callback processing overhead */
1239	mn_now = ev_rt_now;	1961	time_update (EV_A_ 1e100);
1240	}
1241		1962
1242	if (flags & EVLOOP_NONBLOCK || idlecnt)
1243	block = 0.;
1244	else
1245	{
1246	block = MAX_BLOCKTIME;	1963	waittime = MAX_BLOCKTIME;
1247		1964
1248	if (timercnt)	1965	if (timercnt)
1249	{	1966	{
1250	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1967	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1251	if (block > to) block = to;	1968	if (waittime > to) waittime = to;
1252	}	1969	}
1253		1970
1254	#if EV_PERIODICS	1971	#if EV_PERIODIC_ENABLE
1255	if (periodiccnt)	1972	if (periodiccnt)
1256	{	1973	{
1257	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	1974	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1258	if (block > to) block = to;	1975	if (waittime > to) waittime = to;
1259	}	1976	}
1260	#endif	1977	#endif
1261		1978
1262	if (expect_false (block < 0.)) block = 0.;	1979	if (expect_false (waittime < timeout_blocktime))
		1980	waittime = timeout_blocktime;
		1981
		1982	sleeptime = waittime - backend_fudge;
		1983
		1984	if (expect_true (sleeptime > io_blocktime))
		1985	sleeptime = io_blocktime;
		1986
		1987	if (sleeptime)
		1988	{
		1989	ev_sleep (sleeptime);
		1990	waittime -= sleeptime;
		1991	}
1263	}	1992	}
1264		1993
1265	method_poll (EV_A_ block);	1994	++loop_count;
		1995	backend_poll (EV_A_ waittime);
1266		1996
1267	/* update ev_rt_now, do magic */	1997	/* update ev_rt_now, do magic */
1268	time_update (EV_A);	1998	time_update (EV_A_ waittime + sleeptime);
		1999	}
1269		2000
1270	/* queue pending timers and reschedule them */	2001	/* queue pending timers and reschedule them */
1271	timers_reify (EV_A); /* relative timers called last */	2002	timers_reify (EV_A); /* relative timers called last */
1272	#if EV_PERIODICS	2003	#if EV_PERIODIC_ENABLE
1273	periodics_reify (EV_A); /* absolute timers called first */	2004	periodics_reify (EV_A); /* absolute timers called first */
1274	#endif	2005	#endif
1275		2006
		2007	#if EV_IDLE_ENABLE
1276	/* queue idle watchers unless io or timers are pending */	2008	/* queue idle watchers unless other events are pending */
1277	if (idlecnt && !any_pending (EV_A))	2009	idle_reify (EV_A);
1278	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2010	#endif
1279		2011
1280	/* queue check watchers, to be executed first */	2012	/* queue check watchers, to be executed first */
1281	if (expect_false (checkcnt))	2013	if (expect_false (checkcnt))
1282	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2014	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1283		2015
1284	call_pending (EV_A);	2016	call_pending (EV_A);
1285
1286	if (expect_false (loop_done))
1287	break;
1288	}	2017	}
		2018	while (expect_true (
		2019	activecnt
		2020	&& !loop_done
		2021	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		2022	));
1289		2023
1290	if (loop_done != 2)	2024	if (loop_done == EVUNLOOP_ONE)
1291	loop_done = 0;	2025	loop_done = EVUNLOOP_CANCEL;
1292	}	2026	}
1293		2027
1294	void	2028	void
1295	ev_unloop (EV_P_ int how)	2029	ev_unloop (EV_P_ int how)
1296	{	2030	{
1297	loop_done = how;	2031	loop_done = how;
1298	}	2032	}
1299		2033
1300	/*****************************************************************************/	2034	/*****************************************************************************/
1301		2035
1302	inline void	2036	void inline_size
1303	wlist_add (WL *head, WL elem)	2037	wlist_add (WL *head, WL elem)
1304	{	2038	{
1305	elem->next = *head;	2039	elem->next = *head;
1306	*head = elem;	2040	*head = elem;
1307	}	2041	}
1308		2042
1309	inline void	2043	void inline_size
1310	wlist_del (WL *head, WL elem)	2044	wlist_del (WL *head, WL elem)
1311	{	2045	{
1312	while (*head)	2046	while (*head)
1313	{	2047	{
1314	if (*head == elem)	2048	if (*head == elem)
…		…
1319		2053
1320	head = &(*head)->next;	2054	head = &(*head)->next;
1321	}	2055	}
1322	}	2056	}
1323		2057
1324	inline void	2058	void inline_speed
1325	ev_clear_pending (EV_P_ W w)	2059	clear_pending (EV_P_ W w)
1326	{	2060	{
1327	if (w->pending)	2061	if (w->pending)
1328	{	2062	{
1329	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2063	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1330	w->pending = 0;	2064	w->pending = 0;
1331	}	2065	}
1332	}	2066	}
1333		2067
1334	inline void	2068	int
		2069	ev_clear_pending (EV_P_ void *w)
		2070	{
		2071	W w_ = (W)w;
		2072	int pending = w_->pending;
		2073
		2074	if (expect_true (pending))
		2075	{
		2076	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2077	w_->pending = 0;
		2078	p->w = 0;
		2079	return p->events;
		2080	}
		2081	else
		2082	return 0;
		2083	}
		2084
		2085	void inline_size
		2086	pri_adjust (EV_P_ W w)
		2087	{
		2088	int pri = w->priority;
		2089	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2090	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2091	w->priority = pri;
		2092	}
		2093
		2094	void inline_speed
1335	ev_start (EV_P_ W w, int active)	2095	ev_start (EV_P_ W w, int active)
1336	{	2096	{
1337	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2097	pri_adjust (EV_A_ w);
1338	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1339
1340	w->active = active;	2098	w->active = active;
1341	ev_ref (EV_A);	2099	ev_ref (EV_A);
1342	}	2100	}
1343		2101
1344	inline void	2102	void inline_size
1345	ev_stop (EV_P_ W w)	2103	ev_stop (EV_P_ W w)
1346	{	2104	{
1347	ev_unref (EV_A);	2105	ev_unref (EV_A);
1348	w->active = 0;	2106	w->active = 0;
1349	}	2107	}
1350		2108
1351	/*****************************************************************************/	2109	/*****************************************************************************/
1352		2110
1353	void	2111	void noinline
1354	ev_io_start (EV_P_ struct ev_io *w)	2112	ev_io_start (EV_P_ ev_io *w)
1355	{	2113	{
1356	int fd = w->fd;	2114	int fd = w->fd;
1357		2115
1358	if (expect_false (ev_is_active (w)))	2116	if (expect_false (ev_is_active (w)))
1359	return;	2117	return;
1360		2118
1361	assert (("ev_io_start called with negative fd", fd >= 0));	2119	assert (("ev_io_start called with negative fd", fd >= 0));
1362		2120
		2121	EV_FREQUENT_CHECK;
		2122
1363	ev_start (EV_A_ (W)w, 1);	2123	ev_start (EV_A_ (W)w, 1);
1364	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2124	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1365	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2125	wlist_add (&anfds[fd].head, (WL)w);
1366		2126
1367	fd_change (EV_A_ fd);	2127	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1368	}	2128	w->events &= ~EV_IOFDSET;
1369		2129
1370	void	2130	EV_FREQUENT_CHECK;
		2131	}
		2132
		2133	void noinline
1371	ev_io_stop (EV_P_ struct ev_io *w)	2134	ev_io_stop (EV_P_ ev_io *w)
1372	{	2135	{
1373	ev_clear_pending (EV_A_ (W)w);	2136	clear_pending (EV_A_ (W)w);
1374	if (expect_false (!ev_is_active (w)))	2137	if (expect_false (!ev_is_active (w)))
1375	return;	2138	return;
1376		2139
1377	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2140	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1378		2141
		2142	EV_FREQUENT_CHECK;
		2143
1379	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2144	wlist_del (&anfds[w->fd].head, (WL)w);
1380	ev_stop (EV_A_ (W)w);	2145	ev_stop (EV_A_ (W)w);
1381		2146
1382	fd_change (EV_A_ w->fd);	2147	fd_change (EV_A_ w->fd, 1);
1383	}
1384		2148
1385	void	2149	EV_FREQUENT_CHECK;
		2150	}
		2151
		2152	void noinline
1386	ev_timer_start (EV_P_ struct ev_timer *w)	2153	ev_timer_start (EV_P_ ev_timer *w)
1387	{	2154	{
1388	if (expect_false (ev_is_active (w)))	2155	if (expect_false (ev_is_active (w)))
1389	return;	2156	return;
1390		2157
1391	((WT)w)->at += mn_now;	2158	ev_at (w) += mn_now;
1392		2159
1393	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2160	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1394		2161
		2162	EV_FREQUENT_CHECK;
		2163
		2164	++timercnt;
1395	ev_start (EV_A_ (W)w, ++timercnt);	2165	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1396	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);	2166	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1397	timers [timercnt - 1] = w;	2167	ANHE_w (timers [ev_active (w)]) = (WT)w;
1398	upheap ((WT *)timers, timercnt - 1);	2168	ANHE_at_cache (timers [ev_active (w)]);
		2169	upheap (timers, ev_active (w));
1399		2170
		2171	EV_FREQUENT_CHECK;
		2172
1400	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2173	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1401	}	2174	}
1402		2175
1403	void	2176	void noinline
1404	ev_timer_stop (EV_P_ struct ev_timer *w)	2177	ev_timer_stop (EV_P_ ev_timer *w)
1405	{	2178	{
1406	ev_clear_pending (EV_A_ (W)w);	2179	clear_pending (EV_A_ (W)w);
1407	if (expect_false (!ev_is_active (w)))	2180	if (expect_false (!ev_is_active (w)))
1408	return;	2181	return;
1409		2182
		2183	EV_FREQUENT_CHECK;
		2184
		2185	{
		2186	int active = ev_active (w);
		2187
1410	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2188	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1411		2189
		2190	--timercnt;
		2191
1412	if (expect_true (((W)w)->active < timercnt--))	2192	if (expect_true (active < timercnt + HEAP0))
1413	{	2193	{
1414	timers [((W)w)->active - 1] = timers [timercnt];	2194	timers [active] = timers [timercnt + HEAP0];
1415	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2195	adjustheap (timers, timercnt, active);
1416	}	2196	}
		2197	}
1417		2198
1418	((WT)w)->at -= mn_now;	2199	EV_FREQUENT_CHECK;
		2200
		2201	ev_at (w) -= mn_now;
1419		2202
1420	ev_stop (EV_A_ (W)w);	2203	ev_stop (EV_A_ (W)w);
1421	}	2204	}
1422		2205
1423	void	2206	void noinline
1424	ev_timer_again (EV_P_ struct ev_timer *w)	2207	ev_timer_again (EV_P_ ev_timer *w)
1425	{	2208	{
		2209	EV_FREQUENT_CHECK;
		2210
1426	if (ev_is_active (w))	2211	if (ev_is_active (w))
1427	{	2212	{
1428	if (w->repeat)	2213	if (w->repeat)
1429	{	2214	{
1430	((WT)w)->at = mn_now + w->repeat;	2215	ev_at (w) = mn_now + w->repeat;
		2216	ANHE_at_cache (timers [ev_active (w)]);
1431	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2217	adjustheap (timers, timercnt, ev_active (w));
1432	}	2218	}
1433	else	2219	else
1434	ev_timer_stop (EV_A_ w);	2220	ev_timer_stop (EV_A_ w);
1435	}	2221	}
1436	else if (w->repeat)	2222	else if (w->repeat)
1437	{	2223	{
1438	w->at = w->repeat;	2224	ev_at (w) = w->repeat;
1439	ev_timer_start (EV_A_ w);	2225	ev_timer_start (EV_A_ w);
1440	}	2226	}
1441	}
1442		2227
		2228	EV_FREQUENT_CHECK;
		2229	}
		2230
1443	#if EV_PERIODICS	2231	#if EV_PERIODIC_ENABLE
1444	void	2232	void noinline
1445	ev_periodic_start (EV_P_ struct ev_periodic *w)	2233	ev_periodic_start (EV_P_ ev_periodic *w)
1446	{	2234	{
1447	if (expect_false (ev_is_active (w)))	2235	if (expect_false (ev_is_active (w)))
1448	return;	2236	return;
1449		2237
1450	if (w->reschedule_cb)	2238	if (w->reschedule_cb)
1451	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2239	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1452	else if (w->interval)	2240	else if (w->interval)
1453	{	2241	{
1454	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2242	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 */	2243	/* 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;	2244	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1457	}	2245	}
		2246	else
		2247	ev_at (w) = w->offset;
1458		2248
		2249	EV_FREQUENT_CHECK;
		2250
		2251	++periodiccnt;
1459	ev_start (EV_A_ (W)w, ++periodiccnt);	2252	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1460	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2253	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1461	periodics [periodiccnt - 1] = w;	2254	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1462	upheap ((WT *)periodics, periodiccnt - 1);	2255	ANHE_at_cache (periodics [ev_active (w)]);
		2256	upheap (periodics, ev_active (w));
1463		2257
		2258	EV_FREQUENT_CHECK;
		2259
1464	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2260	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1465	}	2261	}
1466		2262
1467	void	2263	void noinline
1468	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2264	ev_periodic_stop (EV_P_ ev_periodic *w)
1469	{	2265	{
1470	ev_clear_pending (EV_A_ (W)w);	2266	clear_pending (EV_A_ (W)w);
1471	if (expect_false (!ev_is_active (w)))	2267	if (expect_false (!ev_is_active (w)))
1472	return;	2268	return;
1473		2269
		2270	EV_FREQUENT_CHECK;
		2271
		2272	{
		2273	int active = ev_active (w);
		2274
1474	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2275	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1475		2276
		2277	--periodiccnt;
		2278
1476	if (expect_true (((W)w)->active < periodiccnt--))	2279	if (expect_true (active < periodiccnt + HEAP0))
1477	{	2280	{
1478	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2281	periodics [active] = periodics [periodiccnt + HEAP0];
1479	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2282	adjustheap (periodics, periodiccnt, active);
1480	}	2283	}
		2284	}
		2285
		2286	EV_FREQUENT_CHECK;
1481		2287
1482	ev_stop (EV_A_ (W)w);	2288	ev_stop (EV_A_ (W)w);
1483	}	2289	}
1484		2290
1485	void	2291	void noinline
1486	ev_periodic_again (EV_P_ struct ev_periodic *w)	2292	ev_periodic_again (EV_P_ ev_periodic *w)
1487	{	2293	{
1488	/* TODO: use adjustheap and recalculation */	2294	/* TODO: use adjustheap and recalculation */
1489	ev_periodic_stop (EV_A_ w);	2295	ev_periodic_stop (EV_A_ w);
1490	ev_periodic_start (EV_A_ w);	2296	ev_periodic_start (EV_A_ w);
1491	}	2297	}
1492	#endif	2298	#endif
1493		2299
1494	void	2300	#ifndef SA_RESTART
1495	ev_idle_start (EV_P_ struct ev_idle *w)	2301	# define SA_RESTART 0
		2302	#endif
		2303
		2304	void noinline
		2305	ev_signal_start (EV_P_ ev_signal *w)
1496	{	2306	{
		2307	#if EV_MULTIPLICITY
		2308	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2309	#endif
1497	if (expect_false (ev_is_active (w)))	2310	if (expect_false (ev_is_active (w)))
1498	return;	2311	return;
1499		2312
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));	2313	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1574		2314
		2315	evpipe_init (EV_A);
		2316
		2317	EV_FREQUENT_CHECK;
		2318
		2319	{
		2320	#ifndef _WIN32
		2321	sigset_t full, prev;
		2322	sigfillset (&full);
		2323	sigprocmask (SIG_SETMASK, &full, &prev);
		2324	#endif
		2325
		2326	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2327
		2328	#ifndef _WIN32
		2329	sigprocmask (SIG_SETMASK, &prev, 0);
		2330	#endif
		2331	}
		2332
1575	ev_start (EV_A_ (W)w, 1);	2333	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);	2334	wlist_add (&signals [w->signum - 1].head, (WL)w);
1578		2335
1579	if (!((WL)w)->next)	2336	if (!((WL)w)->next)
1580	{	2337	{
1581	#if _WIN32	2338	#if _WIN32
1582	signal (w->signum, sighandler);	2339	signal (w->signum, ev_sighandler);
1583	#else	2340	#else
1584	struct sigaction sa;	2341	struct sigaction sa;
1585	sa.sa_handler = sighandler;	2342	sa.sa_handler = ev_sighandler;
1586	sigfillset (&sa.sa_mask);	2343	sigfillset (&sa.sa_mask);
1587	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2344	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1588	sigaction (w->signum, &sa, 0);	2345	sigaction (w->signum, &sa, 0);
1589	#endif	2346	#endif
1590	}	2347	}
1591	}
1592		2348
1593	void	2349	EV_FREQUENT_CHECK;
		2350	}
		2351
		2352	void noinline
1594	ev_signal_stop (EV_P_ struct ev_signal *w)	2353	ev_signal_stop (EV_P_ ev_signal *w)
1595	{	2354	{
1596	ev_clear_pending (EV_A_ (W)w);	2355	clear_pending (EV_A_ (W)w);
1597	if (expect_false (!ev_is_active (w)))	2356	if (expect_false (!ev_is_active (w)))
1598	return;	2357	return;
1599		2358
		2359	EV_FREQUENT_CHECK;
		2360
1600	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2361	wlist_del (&signals [w->signum - 1].head, (WL)w);
1601	ev_stop (EV_A_ (W)w);	2362	ev_stop (EV_A_ (W)w);
1602		2363
1603	if (!signals [w->signum - 1].head)	2364	if (!signals [w->signum - 1].head)
1604	signal (w->signum, SIG_DFL);	2365	signal (w->signum, SIG_DFL);
1605	}
1606		2366
		2367	EV_FREQUENT_CHECK;
		2368	}
		2369
1607	void	2370	void
1608	ev_child_start (EV_P_ struct ev_child *w)	2371	ev_child_start (EV_P_ ev_child *w)
1609	{	2372	{
1610	#if EV_MULTIPLICITY	2373	#if EV_MULTIPLICITY
1611	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2374	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1612	#endif	2375	#endif
1613	if (expect_false (ev_is_active (w)))	2376	if (expect_false (ev_is_active (w)))
1614	return;	2377	return;
1615		2378
		2379	EV_FREQUENT_CHECK;
		2380
1616	ev_start (EV_A_ (W)w, 1);	2381	ev_start (EV_A_ (W)w, 1);
1617	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2382	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1618	}
1619		2383
		2384	EV_FREQUENT_CHECK;
		2385	}
		2386
1620	void	2387	void
1621	ev_child_stop (EV_P_ struct ev_child *w)	2388	ev_child_stop (EV_P_ ev_child *w)
1622	{	2389	{
1623	ev_clear_pending (EV_A_ (W)w);	2390	clear_pending (EV_A_ (W)w);
1624	if (expect_false (!ev_is_active (w)))	2391	if (expect_false (!ev_is_active (w)))
1625	return;	2392	return;
1626		2393
		2394	EV_FREQUENT_CHECK;
		2395
1627	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2396	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1628	ev_stop (EV_A_ (W)w);	2397	ev_stop (EV_A_ (W)w);
		2398
		2399	EV_FREQUENT_CHECK;
1629	}	2400	}
		2401
		2402	#if EV_STAT_ENABLE
		2403
		2404	# ifdef _WIN32
		2405	# undef lstat
		2406	# define lstat(a,b) _stati64 (a,b)
		2407	# endif
		2408
		2409	#define DEF_STAT_INTERVAL 5.0074891
		2410	#define MIN_STAT_INTERVAL 0.1074891
		2411
		2412	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2413
		2414	#if EV_USE_INOTIFY
		2415	# define EV_INOTIFY_BUFSIZE 8192
		2416
		2417	static void noinline
		2418	infy_add (EV_P_ ev_stat *w)
		2419	{
		2420	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);
		2421
		2422	if (w->wd < 0)
		2423	{
		2424	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2425
		2426	/* monitor some parent directory for speedup hints */
		2427	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2428	/* but an efficiency issue only */
		2429	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2430	{
		2431	char path [4096];
		2432	strcpy (path, w->path);
		2433
		2434	do
		2435	{
		2436	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2437	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2438
		2439	char *pend = strrchr (path, '/');
		2440
		2441	if (!pend)
		2442	break; /* whoops, no '/', complain to your admin */
		2443
		2444	*pend = 0;
		2445	w->wd = inotify_add_watch (fs_fd, path, mask);
		2446	}
		2447	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2448	}
		2449	}
		2450	else
		2451	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2452
		2453	if (w->wd >= 0)
		2454	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2455	}
		2456
		2457	static void noinline
		2458	infy_del (EV_P_ ev_stat *w)
		2459	{
		2460	int slot;
		2461	int wd = w->wd;
		2462
		2463	if (wd < 0)
		2464	return;
		2465
		2466	w->wd = -2;
		2467	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2468	wlist_del (&fs_hash [slot].head, (WL)w);
		2469
		2470	/* remove this watcher, if others are watching it, they will rearm */
		2471	inotify_rm_watch (fs_fd, wd);
		2472	}
		2473
		2474	static void noinline
		2475	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2476	{
		2477	if (slot < 0)
		2478	/* overflow, need to check for all hahs slots */
		2479	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2480	infy_wd (EV_A_ slot, wd, ev);
		2481	else
		2482	{
		2483	WL w_;
		2484
		2485	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2486	{
		2487	ev_stat *w = (ev_stat *)w_;
		2488	w_ = w_->next; /* lets us remove this watcher and all before it */
		2489
		2490	if (w->wd == wd || wd == -1)
		2491	{
		2492	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2493	{
		2494	w->wd = -1;
		2495	infy_add (EV_A_ w); /* re-add, no matter what */
		2496	}
		2497
		2498	stat_timer_cb (EV_A_ &w->timer, 0);
		2499	}
		2500	}
		2501	}
		2502	}
		2503
		2504	static void
		2505	infy_cb (EV_P_ ev_io *w, int revents)
		2506	{
		2507	char buf [EV_INOTIFY_BUFSIZE];
		2508	struct inotify_event *ev = (struct inotify_event *)buf;
		2509	int ofs;
		2510	int len = read (fs_fd, buf, sizeof (buf));
		2511
		2512	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2513	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2514	}
		2515
		2516	void inline_size
		2517	infy_init (EV_P)
		2518	{
		2519	if (fs_fd != -2)
		2520	return;
		2521
		2522	fs_fd = inotify_init ();
		2523
		2524	if (fs_fd >= 0)
		2525	{
		2526	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2527	ev_set_priority (&fs_w, EV_MAXPRI);
		2528	ev_io_start (EV_A_ &fs_w);
		2529	}
		2530	}
		2531
		2532	void inline_size
		2533	infy_fork (EV_P)
		2534	{
		2535	int slot;
		2536
		2537	if (fs_fd < 0)
		2538	return;
		2539
		2540	close (fs_fd);
		2541	fs_fd = inotify_init ();
		2542
		2543	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2544	{
		2545	WL w_ = fs_hash [slot].head;
		2546	fs_hash [slot].head = 0;
		2547
		2548	while (w_)
		2549	{
		2550	ev_stat *w = (ev_stat *)w_;
		2551	w_ = w_->next; /* lets us add this watcher */
		2552
		2553	w->wd = -1;
		2554
		2555	if (fs_fd >= 0)
		2556	infy_add (EV_A_ w); /* re-add, no matter what */
		2557	else
		2558	ev_timer_start (EV_A_ &w->timer);
		2559	}
		2560
		2561	}
		2562	}
		2563
		2564	#endif
		2565
		2566	void
		2567	ev_stat_stat (EV_P_ ev_stat *w)
		2568	{
		2569	if (lstat (w->path, &w->attr) < 0)
		2570	w->attr.st_nlink = 0;
		2571	else if (!w->attr.st_nlink)
		2572	w->attr.st_nlink = 1;
		2573	}
		2574
		2575	static void noinline
		2576	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2577	{
		2578	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2579
		2580	/* we copy this here each the time so that */
		2581	/* prev has the old value when the callback gets invoked */
		2582	w->prev = w->attr;
		2583	ev_stat_stat (EV_A_ w);
		2584
		2585	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2586	if (
		2587	w->prev.st_dev != w->attr.st_dev
		2588	|| w->prev.st_ino != w->attr.st_ino
		2589	|| w->prev.st_mode != w->attr.st_mode
		2590	|| w->prev.st_nlink != w->attr.st_nlink
		2591	|| w->prev.st_uid != w->attr.st_uid
		2592	|| w->prev.st_gid != w->attr.st_gid
		2593	|| w->prev.st_rdev != w->attr.st_rdev
		2594	|| w->prev.st_size != w->attr.st_size
		2595	|| w->prev.st_atime != w->attr.st_atime
		2596	|| w->prev.st_mtime != w->attr.st_mtime
		2597	|| w->prev.st_ctime != w->attr.st_ctime
		2598	) {
		2599	#if EV_USE_INOTIFY
		2600	infy_del (EV_A_ w);
		2601	infy_add (EV_A_ w);
		2602	ev_stat_stat (EV_A_ w); /* avoid race... */
		2603	#endif
		2604
		2605	ev_feed_event (EV_A_ w, EV_STAT);
		2606	}
		2607	}
		2608
		2609	void
		2610	ev_stat_start (EV_P_ ev_stat *w)
		2611	{
		2612	if (expect_false (ev_is_active (w)))
		2613	return;
		2614
		2615	/* since we use memcmp, we need to clear any padding data etc. */
		2616	memset (&w->prev, 0, sizeof (ev_statdata));
		2617	memset (&w->attr, 0, sizeof (ev_statdata));
		2618
		2619	ev_stat_stat (EV_A_ w);
		2620
		2621	if (w->interval < MIN_STAT_INTERVAL)
		2622	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2623
		2624	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2625	ev_set_priority (&w->timer, ev_priority (w));
		2626
		2627	#if EV_USE_INOTIFY
		2628	infy_init (EV_A);
		2629
		2630	if (fs_fd >= 0)
		2631	infy_add (EV_A_ w);
		2632	else
		2633	#endif
		2634	ev_timer_start (EV_A_ &w->timer);
		2635
		2636	ev_start (EV_A_ (W)w, 1);
		2637
		2638	EV_FREQUENT_CHECK;
		2639	}
		2640
		2641	void
		2642	ev_stat_stop (EV_P_ ev_stat *w)
		2643	{
		2644	clear_pending (EV_A_ (W)w);
		2645	if (expect_false (!ev_is_active (w)))
		2646	return;
		2647
		2648	EV_FREQUENT_CHECK;
		2649
		2650	#if EV_USE_INOTIFY
		2651	infy_del (EV_A_ w);
		2652	#endif
		2653	ev_timer_stop (EV_A_ &w->timer);
		2654
		2655	ev_stop (EV_A_ (W)w);
		2656
		2657	EV_FREQUENT_CHECK;
		2658	}
		2659	#endif
		2660
		2661	#if EV_IDLE_ENABLE
		2662	void
		2663	ev_idle_start (EV_P_ ev_idle *w)
		2664	{
		2665	if (expect_false (ev_is_active (w)))
		2666	return;
		2667
		2668	pri_adjust (EV_A_ (W)w);
		2669
		2670	EV_FREQUENT_CHECK;
		2671
		2672	{
		2673	int active = ++idlecnt [ABSPRI (w)];
		2674
		2675	++idleall;
		2676	ev_start (EV_A_ (W)w, active);
		2677
		2678	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2679	idles [ABSPRI (w)][active - 1] = w;
		2680	}
		2681
		2682	EV_FREQUENT_CHECK;
		2683	}
		2684
		2685	void
		2686	ev_idle_stop (EV_P_ ev_idle *w)
		2687	{
		2688	clear_pending (EV_A_ (W)w);
		2689	if (expect_false (!ev_is_active (w)))
		2690	return;
		2691
		2692	EV_FREQUENT_CHECK;
		2693
		2694	{
		2695	int active = ev_active (w);
		2696
		2697	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2698	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2699
		2700	ev_stop (EV_A_ (W)w);
		2701	--idleall;
		2702	}
		2703
		2704	EV_FREQUENT_CHECK;
		2705	}
		2706	#endif
		2707
		2708	void
		2709	ev_prepare_start (EV_P_ ev_prepare *w)
		2710	{
		2711	if (expect_false (ev_is_active (w)))
		2712	return;
		2713
		2714	EV_FREQUENT_CHECK;
		2715
		2716	ev_start (EV_A_ (W)w, ++preparecnt);
		2717	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2718	prepares [preparecnt - 1] = w;
		2719
		2720	EV_FREQUENT_CHECK;
		2721	}
		2722
		2723	void
		2724	ev_prepare_stop (EV_P_ ev_prepare *w)
		2725	{
		2726	clear_pending (EV_A_ (W)w);
		2727	if (expect_false (!ev_is_active (w)))
		2728	return;
		2729
		2730	EV_FREQUENT_CHECK;
		2731
		2732	{
		2733	int active = ev_active (w);
		2734
		2735	prepares [active - 1] = prepares [--preparecnt];
		2736	ev_active (prepares [active - 1]) = active;
		2737	}
		2738
		2739	ev_stop (EV_A_ (W)w);
		2740
		2741	EV_FREQUENT_CHECK;
		2742	}
		2743
		2744	void
		2745	ev_check_start (EV_P_ ev_check *w)
		2746	{
		2747	if (expect_false (ev_is_active (w)))
		2748	return;
		2749
		2750	EV_FREQUENT_CHECK;
		2751
		2752	ev_start (EV_A_ (W)w, ++checkcnt);
		2753	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2754	checks [checkcnt - 1] = w;
		2755
		2756	EV_FREQUENT_CHECK;
		2757	}
		2758
		2759	void
		2760	ev_check_stop (EV_P_ ev_check *w)
		2761	{
		2762	clear_pending (EV_A_ (W)w);
		2763	if (expect_false (!ev_is_active (w)))
		2764	return;
		2765
		2766	EV_FREQUENT_CHECK;
		2767
		2768	{
		2769	int active = ev_active (w);
		2770
		2771	checks [active - 1] = checks [--checkcnt];
		2772	ev_active (checks [active - 1]) = active;
		2773	}
		2774
		2775	ev_stop (EV_A_ (W)w);
		2776
		2777	EV_FREQUENT_CHECK;
		2778	}
		2779
		2780	#if EV_EMBED_ENABLE
		2781	void noinline
		2782	ev_embed_sweep (EV_P_ ev_embed *w)
		2783	{
		2784	ev_loop (w->other, EVLOOP_NONBLOCK);
		2785	}
		2786
		2787	static void
		2788	embed_io_cb (EV_P_ ev_io *io, int revents)
		2789	{
		2790	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2791
		2792	if (ev_cb (w))
		2793	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2794	else
		2795	ev_loop (w->other, EVLOOP_NONBLOCK);
		2796	}
		2797
		2798	static void
		2799	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2800	{
		2801	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2802
		2803	{
		2804	struct ev_loop *loop = w->other;
		2805
		2806	while (fdchangecnt)
		2807	{
		2808	fd_reify (EV_A);
		2809	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2810	}
		2811	}
		2812	}
		2813
		2814	#if 0
		2815	static void
		2816	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2817	{
		2818	ev_idle_stop (EV_A_ idle);
		2819	}
		2820	#endif
		2821
		2822	void
		2823	ev_embed_start (EV_P_ ev_embed *w)
		2824	{
		2825	if (expect_false (ev_is_active (w)))
		2826	return;
		2827
		2828	{
		2829	struct ev_loop *loop = w->other;
		2830	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2831	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2832	}
		2833
		2834	EV_FREQUENT_CHECK;
		2835
		2836	ev_set_priority (&w->io, ev_priority (w));
		2837	ev_io_start (EV_A_ &w->io);
		2838
		2839	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2840	ev_set_priority (&w->prepare, EV_MINPRI);
		2841	ev_prepare_start (EV_A_ &w->prepare);
		2842
		2843	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2844
		2845	ev_start (EV_A_ (W)w, 1);
		2846
		2847	EV_FREQUENT_CHECK;
		2848	}
		2849
		2850	void
		2851	ev_embed_stop (EV_P_ ev_embed *w)
		2852	{
		2853	clear_pending (EV_A_ (W)w);
		2854	if (expect_false (!ev_is_active (w)))
		2855	return;
		2856
		2857	EV_FREQUENT_CHECK;
		2858
		2859	ev_io_stop (EV_A_ &w->io);
		2860	ev_prepare_stop (EV_A_ &w->prepare);
		2861
		2862	ev_stop (EV_A_ (W)w);
		2863
		2864	EV_FREQUENT_CHECK;
		2865	}
		2866	#endif
		2867
		2868	#if EV_FORK_ENABLE
		2869	void
		2870	ev_fork_start (EV_P_ ev_fork *w)
		2871	{
		2872	if (expect_false (ev_is_active (w)))
		2873	return;
		2874
		2875	EV_FREQUENT_CHECK;
		2876
		2877	ev_start (EV_A_ (W)w, ++forkcnt);
		2878	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2879	forks [forkcnt - 1] = w;
		2880
		2881	EV_FREQUENT_CHECK;
		2882	}
		2883
		2884	void
		2885	ev_fork_stop (EV_P_ ev_fork *w)
		2886	{
		2887	clear_pending (EV_A_ (W)w);
		2888	if (expect_false (!ev_is_active (w)))
		2889	return;
		2890
		2891	EV_FREQUENT_CHECK;
		2892
		2893	{
		2894	int active = ev_active (w);
		2895
		2896	forks [active - 1] = forks [--forkcnt];
		2897	ev_active (forks [active - 1]) = active;
		2898	}
		2899
		2900	ev_stop (EV_A_ (W)w);
		2901
		2902	EV_FREQUENT_CHECK;
		2903	}
		2904	#endif
		2905
		2906	#if EV_ASYNC_ENABLE
		2907	void
		2908	ev_async_start (EV_P_ ev_async *w)
		2909	{
		2910	if (expect_false (ev_is_active (w)))
		2911	return;
		2912
		2913	evpipe_init (EV_A);
		2914
		2915	EV_FREQUENT_CHECK;
		2916
		2917	ev_start (EV_A_ (W)w, ++asynccnt);
		2918	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2919	asyncs [asynccnt - 1] = w;
		2920
		2921	EV_FREQUENT_CHECK;
		2922	}
		2923
		2924	void
		2925	ev_async_stop (EV_P_ ev_async *w)
		2926	{
		2927	clear_pending (EV_A_ (W)w);
		2928	if (expect_false (!ev_is_active (w)))
		2929	return;
		2930
		2931	EV_FREQUENT_CHECK;
		2932
		2933	{
		2934	int active = ev_active (w);
		2935
		2936	asyncs [active - 1] = asyncs [--asynccnt];
		2937	ev_active (asyncs [active - 1]) = active;
		2938	}
		2939
		2940	ev_stop (EV_A_ (W)w);
		2941
		2942	EV_FREQUENT_CHECK;
		2943	}
		2944
		2945	void
		2946	ev_async_send (EV_P_ ev_async *w)
		2947	{
		2948	w->sent = 1;
		2949	evpipe_write (EV_A_ &gotasync);
		2950	}
		2951	#endif
1630		2952
1631	/*****************************************************************************/	2953	/*****************************************************************************/
1632		2954
1633	struct ev_once	2955	struct ev_once
1634	{	2956	{
1635	struct ev_io io;	2957	ev_io io;
1636	struct ev_timer to;	2958	ev_timer to;
1637	void (*cb)(int revents, void *arg);	2959	void (*cb)(int revents, void *arg);
1638	void *arg;	2960	void *arg;
1639	};	2961	};
1640		2962
1641	static void	2963	static void
…		…
1650		2972
1651	cb (revents, arg);	2973	cb (revents, arg);
1652	}	2974	}
1653		2975
1654	static void	2976	static void
1655	once_cb_io (EV_P_ struct ev_io *w, int revents)	2977	once_cb_io (EV_P_ ev_io *w, int revents)
1656	{	2978	{
1657	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2979	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1658	}	2980	}
1659		2981
1660	static void	2982	static void
1661	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2983	once_cb_to (EV_P_ ev_timer *w, int revents)
1662	{	2984	{
1663	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2985	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1664	}	2986	}
1665		2987
1666	void	2988	void
…		…
1690	ev_timer_set (&once->to, timeout, 0.);	3012	ev_timer_set (&once->to, timeout, 0.);
1691	ev_timer_start (EV_A_ &once->to);	3013	ev_timer_start (EV_A_ &once->to);
1692	}	3014	}
1693	}	3015	}
1694		3016
		3017	#if EV_MULTIPLICITY
		3018	#include "ev_wrap.h"
		3019	#endif
		3020
1695	#ifdef __cplusplus	3021	#ifdef __cplusplus
1696	}	3022	}
1697	#endif	3023	#endif
1698		3024

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