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Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.238 by root, Thu May 8 20:49:12 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
31	#if EV_USE_CONFIG_H	46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
32	# include "config.h"	49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
		54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
		57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		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
		73	# endif
		74	# endif
		75
		76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
		82	# endif
		83
		84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
		86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
		90	# endif
		91
		92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
		98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
		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
33	#endif	132	#endif
34		133
35	#include <math.h>	134	#include <math.h>
36	#include <stdlib.h>	135	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	136	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	137	#include <stddef.h>
41		138
42	#include <stdio.h>	139	#include <stdio.h>
43		140
44	#include <assert.h>	141	#include <assert.h>
45	#include <errno.h>	142	#include <errno.h>
46	#include <sys/types.h>	143	#include <sys/types.h>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	144	#include <time.h>
50		145
51	/**/	146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
52		167
53	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
55	#endif	178	#endif
56		179
57	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
59	#endif	182	#endif
60		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
61	#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
62	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
63	#endif	197	# endif
		198	#endif
64		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
65	#ifndef EV_USE_REALTIME	204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
66	# define EV_USE_REALTIME 1	210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
67	#endif	213	# endif
		214	#endif
68		215
69	/**/	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	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
70		241
71	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
72	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
73	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
74	#endif	245	#endif
…		…
76	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
77	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
78	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
79	#endif	250	#endif
80		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
81	/**/	283	/**/
82		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		294
83	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
84	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
85	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
86	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
87		298
88	#include "ev.h"
89
90	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
91	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
92	# define inline inline	301	# define noinline __attribute__ ((noinline))
93	#else	302	#else
94	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
95	# define inline static	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
96	#endif	308	#endif
97		309
98	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
100		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
		319
		320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
101	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
104		329
105	static ev_tstamp now_floor, now, diff; /* monotonic clock */	330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
		336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
		338
		339	#ifdef _WIN32
		340	# include "ev_win32.c"
		341	#endif
		342
		343	/*****************************************************************************/
		344
		345	static void (*syserr_cb)(const char *msg);
		346
		347	void
		348	ev_set_syserr_cb (void (*cb)(const char *msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
		383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void *(*cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
		410	typedef struct
		411	{
		412	WL head;
		413	unsigned char events;
		414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
		418	} ANFD;
		419
		420	typedef struct
		421	{
		422	W w;
		423	int events;
		424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
		432
		433	#if EV_MULTIPLICITY
		434
		435	struct ev_loop
		436	{
		437	ev_tstamp ev_rt_now;
		438	#define ev_rt_now ((loop)->ev_rt_now)
		439	#define VAR(name,decl) decl;
		440	#include "ev_vars.h"
		441	#undef VAR
		442	};
		443	#include "ev_wrap.h"
		444
		445	static struct ev_loop default_loop_struct;
		446	struct ev_loop *ev_default_loop_ptr;
		447
		448	#else
		449
106	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
107	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
108		454
109	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
110		456
111	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
112	static void (*method_modify)(int fd, int oev, int nev);
113	static void (*method_poll)(ev_tstamp timeout);
114		458
115	/*****************************************************************************/	459	/*****************************************************************************/
116		460
117	ev_tstamp	461	ev_tstamp
118	ev_time (void)	462	ev_time (void)
…		…
126	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
127	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
128	#endif	472	#endif
129	}	473	}
130		474
131	static ev_tstamp	475	ev_tstamp inline_size
132	get_clock (void)	476	get_clock (void)
133	{	477	{
134	#if EV_USE_MONOTONIC	478	#if EV_USE_MONOTONIC
135	if (expect_true (have_monotonic))	479	if (expect_true (have_monotonic))
136	{	480	{
…		…
141	#endif	485	#endif
142		486
143	return ev_time ();	487	return ev_time ();
144	}	488	}
145		489
146	#define array_roundsize(base,n) ((n) | 4 & ~3)	490	#if EV_MULTIPLICITY
		491	ev_tstamp
		492	ev_now (EV_P)
		493	{
		494	return ev_rt_now;
		495	}
		496	#endif
147		497
148	#define array_needsize(base,cur,cnt,init) \	498	void
149	if (expect_false ((cnt) > cur)) \	499	ev_sleep (ev_tstamp delay)
150	{ \	500	{
151	int newcnt = cur; \	501	if (delay > 0.)
152	do \
153	{ \
154	newcnt = array_roundsize (base, newcnt << 1); \
155	} \
156	while ((cnt) > newcnt); \
157	\
158	base = realloc (base, sizeof (*base) * (newcnt)); \
159	init (base + cur, newcnt - cur); \
160	cur = newcnt; \
161	}	502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
162		522
163	/*****************************************************************************/	523	/*****************************************************************************/
164		524
165	typedef struct	525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
166	{
167	struct ev_io *head;
168	unsigned char events;
169	unsigned char reify;
170	} ANFD;
171		526
172	static ANFD *anfds;	527	int inline_size
173	static int anfdmax;	528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
174		531
175	static void	532	do
		533	ncur <<= 1;
		534	while (cnt > ncur);
		535
		536	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		537	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		538	{
		539	ncur *= elem;
		540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		541	ncur = ncur - sizeof (void *) * 4;
		542	ncur /= elem;
		543	}
		544
		545	return ncur;
		546	}
		547
		548	static noinline void *
		549	array_realloc (int elem, void *base, int *cur, int cnt)
		550	{
		551	*cur = array_nextsize (elem, *cur, cnt);
		552	return ev_realloc (base, elem * *cur);
		553	}
		554
		555	#define array_needsize(type,base,cur,cnt,init) \
		556	if (expect_false ((cnt) > (cur))) \
		557	{ \
		558	int ocur_ = (cur); \
		559	(base) = (type *)array_realloc \
		560	(sizeof (type), (base), &(cur), (cnt)); \
		561	init ((base) + (ocur_), (cur) - ocur_); \
		562	}
		563
		564	#if 0
		565	#define array_slim(type,stem) \
		566	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		567	{ \
		568	stem ## max = array_roundsize (stem ## cnt >> 1); \
		569	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		570	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		571	}
		572	#endif
		573
		574	#define array_free(stem, idx) \
		575	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		576
		577	/*****************************************************************************/
		578
		579	void noinline
		580	ev_feed_event (EV_P_ void *w, int revents)
		581	{
		582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
		584
		585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events |= revents;
		587	else
		588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
		592	pendings [pri][w_->pending - 1].events = revents;
		593	}
		594	}
		595
		596	void inline_speed
		597	queue_events (EV_P_ W *events, int eventcnt, int type)
		598	{
		599	int i;
		600
		601	for (i = 0; i < eventcnt; ++i)
		602	ev_feed_event (EV_A_ events [i], type);
		603	}
		604
		605	/*****************************************************************************/
		606
		607	void inline_size
176	anfds_init (ANFD *base, int count)	608	anfds_init (ANFD *base, int count)
177	{	609	{
178	while (count--)	610	while (count--)
179	{	611	{
180	base->head = 0;	612	base->head = 0;
…		…
183		615
184	++base;	616	++base;
185	}	617	}
186	}	618	}
187		619
188	typedef struct	620	void inline_speed
189	{
190	W w;
191	int events;
192	} ANPENDING;
193
194	static ANPENDING *pendings;
195	static int pendingmax, pendingcnt;
196
197	static void
198	event (W w, int events)
199	{
200	if (w->pending)
201	{
202	pendings [w->pending - 1].events |= events;
203	return;
204	}
205
206	w->pending = ++pendingcnt;
207	array_needsize (pendings, pendingmax, pendingcnt, );
208	pendings [pendingcnt - 1].w = w;
209	pendings [pendingcnt - 1].events = events;
210	}
211
212	static void
213	queue_events (W *events, int eventcnt, int type)
214	{
215	int i;
216
217	for (i = 0; i < eventcnt; ++i)
218	event (events [i], type);
219	}
220
221	static void
222	fd_event (int fd, int events)	621	fd_event (EV_P_ int fd, int revents)
223	{	622	{
224	ANFD *anfd = anfds + fd;	623	ANFD *anfd = anfds + fd;
225	struct ev_io *w;	624	ev_io *w;
226		625
227	for (w = anfd->head; w; w = w->next)	626	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
228	{	627	{
229	int ev = w->events & events;	628	int ev = w->events & revents;
230		629
231	if (ev)	630	if (ev)
232	event ((W)w, ev);	631	ev_feed_event (EV_A_ (W)w, ev);
233	}	632	}
234	}	633	}
235		634
236	/*****************************************************************************/	635	void
		636	ev_feed_fd_event (EV_P_ int fd, int revents)
		637	{
		638	if (fd >= 0 && fd < anfdmax)
		639	fd_event (EV_A_ fd, revents);
		640	}
237		641
238	static int *fdchanges;	642	void inline_size
239	static int fdchangemax, fdchangecnt;	643	fd_reify (EV_P)
240
241	static void
242	fd_reify (void)
243	{	644	{
244	int i;	645	int i;
245		646
246	for (i = 0; i < fdchangecnt; ++i)	647	for (i = 0; i < fdchangecnt; ++i)
247	{	648	{
248	int fd = fdchanges [i];	649	int fd = fdchanges [i];
249	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	651	ev_io *w;
251		652
252	int events = 0;	653	unsigned char events = 0;
253		654
254	for (w = anfd->head; w; w = w->next)	655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
255	events |= w->events;	656	events |= (unsigned char)w->events;
256		657
257	anfd->reify = 0;	658	#if EV_SELECT_IS_WINSOCKET
258		659	if (events)
259	if (anfd->events != events)
260	{	660	{
261	method_modify (fd, anfd->events, events);	661	unsigned long argp;
262	anfd->events = events;	662	#ifdef EV_FD_TO_WIN32_HANDLE
		663	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		664	#else
		665	anfd->handle = _get_osfhandle (fd);
		666	#endif
		667	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
263	}	668	}
		669	#endif
		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
		675	anfd->reify = 0;
		676	anfd->events = events;
		677
		678	if (o_events != events || o_reify & EV_IOFDSET)
		679	backend_modify (EV_A_ fd, o_events, events);
		680	}
264	}	681	}
265		682
266	fdchangecnt = 0;	683	fdchangecnt = 0;
267	}	684	}
268		685
269	static void	686	void inline_size
270	fd_change (int fd)	687	fd_change (EV_P_ int fd, int flags)
271	{	688	{
272	if (anfds [fd].reify || fdchangecnt < 0)	689	unsigned char reify = anfds [fd].reify;
273	return;
274
275	anfds [fd].reify = 1;	690	anfds [fd].reify |= flags;
276		691
		692	if (expect_true (!reify))
		693	{
277	++fdchangecnt;	694	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
279	fdchanges [fdchangecnt - 1] = fd;	696	fdchanges [fdchangecnt - 1] = fd;
		697	}
		698	}
		699
		700	void inline_speed
		701	fd_kill (EV_P_ int fd)
		702	{
		703	ev_io *w;
		704
		705	while ((w = (ev_io *)anfds [fd].head))
		706	{
		707	ev_io_stop (EV_A_ w);
		708	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		709	}
		710	}
		711
		712	int inline_size
		713	fd_valid (int fd)
		714	{
		715	#ifdef _WIN32
		716	return _get_osfhandle (fd) != -1;
		717	#else
		718	return fcntl (fd, F_GETFD) != -1;
		719	#endif
280	}	720	}
281		721
282	/* called on EBADF to verify fds */	722	/* called on EBADF to verify fds */
283	static void	723	static void noinline
284	fd_recheck (void)	724	fd_ebadf (EV_P)
285	{	725	{
286	int fd;	726	int fd;
287		727
288	for (fd = 0; fd < anfdmax; ++fd)	728	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	729	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	730	if (!fd_valid (fd) == -1 && errno == EBADF)
291	while (anfds [fd].head)	731	fd_kill (EV_A_ fd);
		732	}
		733
		734	/* called on ENOMEM in select/poll to kill some fds and retry */
		735	static void noinline
		736	fd_enomem (EV_P)
		737	{
		738	int fd;
		739
		740	for (fd = anfdmax; fd--; )
		741	if (anfds [fd].events)
292	{	742	{
293	ev_io_stop (anfds [fd].head);	743	fd_kill (EV_A_ fd);
294	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	744	return;
295	}	745	}
		746	}
		747
		748	/* usually called after fork if backend needs to re-arm all fds from scratch */
		749	static void noinline
		750	fd_rearm_all (EV_P)
		751	{
		752	int fd;
		753
		754	for (fd = 0; fd < anfdmax; ++fd)
		755	if (anfds [fd].events)
		756	{
		757	anfds [fd].events = 0;
		758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		759	}
296	}	760	}
297		761
298	/*****************************************************************************/	762	/*****************************************************************************/
299		763
300	static struct ev_timer **timers;	764	/*
301	static int timermax, timercnt;	765	* at the moment we allow libev the luxury of two heaps,
		766	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		767	* which is more cache-efficient.
		768	* the difference is about 5% with 50000+ watchers.
		769	*/
		770	#define USE_4HEAP !EV_MINIMAL
		771	#define USE_4HEAP 1/* they do not work corretcly */
		772	#if USE_4HEAP
302		773
303	static struct ev_periodic **periodics;	774	#define DHEAP 4
304	static int periodicmax, periodiccnt;	775	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
305		776
306	static void	777	/* towards the root */
		778	void inline_speed
307	upheap (WT *timers, int k)	779	upheap (WT *heap, int k)
308	{	780	{
309	WT w = timers [k];	781	WT w = heap [k];
310		782
311	while (k && timers [k >> 1]->at > w->at)	783	for (;;)
312	{
313	timers [k] = timers [k >> 1];
314	timers [k]->active = k + 1;
315	k >>= 1;
316	}	784	{
		785	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
317		786
318	timers [k] = w;	787	if (p == k || heap [p]->at <= w->at)
319	timers [k]->active = k + 1;
320
321	}
322
323	static void
324	downheap (WT *timers, int N, int k)
325	{
326	WT w = timers [k];
327
328	while (k < (N >> 1))
329	{
330	int j = k << 1;
331
332	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
333	++j;
334
335	if (w->at <= timers [j]->at)
336	break;	788	break;
337		789
338	timers [k] = timers [j];	790	heap [k] = heap [p];
339	timers [k]->active = k + 1;	791	ev_active (heap [k]) = k;
340	k = j;	792	k = p;
		793	}
		794
		795	heap [k] = w;
		796	ev_active (heap [k]) = k;
		797	}
		798
		799	/* away from the root */
		800	void inline_speed
		801	downheap (WT *heap, int N, int k)
		802	{
		803	WT w = heap [k];
		804	WT *E = heap + N + HEAP0;
		805
		806	for (;;)
341	}	807	{
		808	ev_tstamp minat;
		809	WT *minpos;
		810	WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
342		811
		812	// find minimum child
		813	if (expect_true (pos + DHEAP - 1 < E))
		814	{
		815	/* fast path */
		816	(minpos = pos + 0), (minat = (*minpos)->at);
		817	if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		818	if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		819	if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		820	}
		821	else
		822	{
		823	/* slow path */
		824	if (pos >= E)
		825	break;
		826	(minpos = pos + 0), (minat = (*minpos)->at);
		827	if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		828	if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		829	if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		830	}
		831
		832	if (w->at <= minat)
		833	break;
		834
		835	ev_active (*minpos) = k;
		836	heap [k] = *minpos;
		837
		838	k = minpos - heap;
		839	}
		840
343	timers [k] = w;	841	heap [k] = w;
344	timers [k]->active = k + 1;	842	ev_active (heap [k]) = k;
		843	}
		844
		845	#else // 4HEAP
		846
		847	#define HEAP0 1
		848
		849	/* towards the root */
		850	void inline_speed
		851	upheap (WT *heap, int k)
		852	{
		853	WT w = heap [k];
		854
		855	for (;;)
		856	{
		857	int p = k >> 1;
		858
		859	/* maybe we could use a dummy element at heap [0]? */
		860	if (!p || heap [p]->at <= w->at)
		861	break;
		862
		863	heap [k] = heap [p];
		864	ev_active (heap [k]) = k;
		865	k = p;
		866	}
		867
		868	heap [k] = w;
		869	ev_active (heap [k]) = k;
		870	}
		871
		872	/* away from the root */
		873	void inline_speed
		874	downheap (WT *heap, int N, int k)
		875	{
		876	WT w = heap [k];
		877
		878	for (;;)
		879	{
		880	int c = k << 1;
		881
		882	if (c > N)
		883	break;
		884
		885	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		886	? 1 : 0;
		887
		888	if (w->at <= heap [c]->at)
		889	break;
		890
		891	heap [k] = heap [c];
		892	((W)heap [k])->active = k;
		893
		894	k = c;
		895	}
		896
		897	heap [k] = w;
		898	ev_active (heap [k]) = k;
		899	}
		900	#endif
		901
		902	void inline_size
		903	adjustheap (WT *heap, int N, int k)
		904	{
		905	upheap (heap, k);
		906	downheap (heap, N, k);
345	}	907	}
346		908
347	/*****************************************************************************/	909	/*****************************************************************************/
348		910
349	typedef struct	911	typedef struct
350	{	912	{
351	struct ev_signal *head;	913	WL head;
352	sig_atomic_t volatile gotsig;	914	EV_ATOMIC_T gotsig;
353	} ANSIG;	915	} ANSIG;
354		916
355	static ANSIG *signals;	917	static ANSIG *signals;
356	static int signalmax;	918	static int signalmax;
357		919
358	static int sigpipe [2];	920	static EV_ATOMIC_T gotsig;
359	static sig_atomic_t volatile gotsig;
360	static struct ev_io sigev;
361		921
362	static void	922	void inline_size
363	signals_init (ANSIG *base, int count)	923	signals_init (ANSIG *base, int count)
364	{	924	{
365	while (count--)	925	while (count--)
366	{	926	{
367	base->head = 0;	927	base->head = 0;
…		…
369		929
370	++base;	930	++base;
371	}	931	}
372	}	932	}
373		933
		934	/*****************************************************************************/
		935
		936	void inline_speed
		937	fd_intern (int fd)
		938	{
		939	#ifdef _WIN32
		940	int arg = 1;
		941	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		942	#else
		943	fcntl (fd, F_SETFD, FD_CLOEXEC);
		944	fcntl (fd, F_SETFL, O_NONBLOCK);
		945	#endif
		946	}
		947
		948	static void noinline
		949	evpipe_init (EV_P)
		950	{
		951	if (!ev_is_active (&pipeev))
		952	{
		953	#if EV_USE_EVENTFD
		954	if ((evfd = eventfd (0, 0)) >= 0)
		955	{
		956	evpipe [0] = -1;
		957	fd_intern (evfd);
		958	ev_io_set (&pipeev, evfd, EV_READ);
		959	}
		960	else
		961	#endif
		962	{
		963	while (pipe (evpipe))
		964	syserr ("(libev) error creating signal/async pipe");
		965
		966	fd_intern (evpipe [0]);
		967	fd_intern (evpipe [1]);
		968	ev_io_set (&pipeev, evpipe [0], EV_READ);
		969	}
		970
		971	ev_io_start (EV_A_ &pipeev);
		972	ev_unref (EV_A); /* watcher should not keep loop alive */
		973	}
		974	}
		975
		976	void inline_size
		977	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		978	{
		979	if (!*flag)
		980	{
		981	int old_errno = errno; /* save errno because write might clobber it */
		982
		983	*flag = 1;
		984
		985	#if EV_USE_EVENTFD
		986	if (evfd >= 0)
		987	{
		988	uint64_t counter = 1;
		989	write (evfd, &counter, sizeof (uint64_t));
		990	}
		991	else
		992	#endif
		993	write (evpipe [1], &old_errno, 1);
		994
		995	errno = old_errno;
		996	}
		997	}
		998
374	static void	999	static void
		1000	pipecb (EV_P_ ev_io *iow, int revents)
		1001	{
		1002	#if EV_USE_EVENTFD
		1003	if (evfd >= 0)
		1004	{
		1005	uint64_t counter;
		1006	read (evfd, &counter, sizeof (uint64_t));
		1007	}
		1008	else
		1009	#endif
		1010	{
		1011	char dummy;
		1012	read (evpipe [0], &dummy, 1);
		1013	}
		1014
		1015	if (gotsig && ev_is_default_loop (EV_A))
		1016	{
		1017	int signum;
		1018	gotsig = 0;
		1019
		1020	for (signum = signalmax; signum--; )
		1021	if (signals [signum].gotsig)
		1022	ev_feed_signal_event (EV_A_ signum + 1);
		1023	}
		1024
		1025	#if EV_ASYNC_ENABLE
		1026	if (gotasync)
		1027	{
		1028	int i;
		1029	gotasync = 0;
		1030
		1031	for (i = asynccnt; i--; )
		1032	if (asyncs [i]->sent)
		1033	{
		1034	asyncs [i]->sent = 0;
		1035	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1036	}
		1037	}
		1038	#endif
		1039	}
		1040
		1041	/*****************************************************************************/
		1042
		1043	static void
375	sighandler (int signum)	1044	ev_sighandler (int signum)
376	{	1045	{
		1046	#if EV_MULTIPLICITY
		1047	struct ev_loop *loop = &default_loop_struct;
		1048	#endif
		1049
		1050	#if _WIN32
		1051	signal (signum, ev_sighandler);
		1052	#endif
		1053
377	signals [signum - 1].gotsig = 1;	1054	signals [signum - 1].gotsig = 1;
378		1055	evpipe_write (EV_A_ &gotsig);
379	if (!gotsig)
380	{
381	gotsig = 1;
382	write (sigpipe [1], &signum, 1);
383	}
384	}	1056	}
385		1057
386	static void	1058	void noinline
387	sigcb (struct ev_io *iow, int revents)	1059	ev_feed_signal_event (EV_P_ int signum)
388	{	1060	{
389	struct ev_signal *w;	1061	WL w;
		1062
		1063	#if EV_MULTIPLICITY
		1064	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1065	#endif
		1066
390	int signum;	1067	--signum;
391		1068
392	read (sigpipe [0], &revents, 1);	1069	if (signum < 0 || signum >= signalmax)
393	gotsig = 0;	1070	return;
394		1071
395	for (signum = signalmax; signum--; )
396	if (signals [signum].gotsig)
397	{
398	signals [signum].gotsig = 0;	1072	signals [signum].gotsig = 0;
399		1073
400	for (w = signals [signum].head; w; w = w->next)	1074	for (w = signals [signum].head; w; w = w->next)
401	event ((W)w, EV_SIGNAL);	1075	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
402	}
403	}
404
405	static void
406	siginit (void)
407	{
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410
411	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
414
415	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);
417	}	1076	}
418		1077
419	/*****************************************************************************/	1078	/*****************************************************************************/
420		1079
421	static struct ev_idle **idles;	1080	static WL childs [EV_PID_HASHSIZE];
422	static int idlemax, idlecnt;
423		1081
424	static struct ev_prepare **prepares;	1082	#ifndef _WIN32
425	static int preparemax, preparecnt;
426		1083
427	static struct ev_check **checks;
428	static int checkmax, checkcnt;
429
430	/*****************************************************************************/
431
432	static struct ev_child *childs [PID_HASHSIZE];
433	static struct ev_signal childev;	1084	static ev_signal childev;
		1085
		1086	#ifndef WIFCONTINUED
		1087	# define WIFCONTINUED(status) 0
		1088	#endif
		1089
		1090	void inline_speed
		1091	child_reap (EV_P_ int chain, int pid, int status)
		1092	{
		1093	ev_child *w;
		1094	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1095
		1096	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1097	{
		1098	if ((w->pid == pid || !w->pid)
		1099	&& (!traced || (w->flags & 1)))
		1100	{
		1101	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1102	w->rpid = pid;
		1103	w->rstatus = status;
		1104	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1105	}
		1106	}
		1107	}
434		1108
435	#ifndef WCONTINUED	1109	#ifndef WCONTINUED
436	# define WCONTINUED 0	1110	# define WCONTINUED 0
437	#endif	1111	#endif
438		1112
439	static void	1113	static void
440	childcb (struct ev_signal *sw, int revents)	1114	childcb (EV_P_ ev_signal *sw, int revents)
441	{	1115	{
442	struct ev_child *w;
443	int pid, status;	1116	int pid, status;
444		1117
		1118	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
445	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	1119	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	1120	if (!WCONTINUED
447	if (w->pid == pid || !w->pid)	1121	|| errno != EINVAL
448	{	1122	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
449	w->status = status;	1123	return;
450	event ((W)w, EV_CHILD);	1124
451	}	1125	/* make sure we are called again until all children have been reaped */
		1126	/* we need to do it this way so that the callback gets called before we continue */
		1127	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1128
		1129	child_reap (EV_A_ pid, pid, status);
		1130	if (EV_PID_HASHSIZE > 1)
		1131	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
452	}	1132	}
		1133
		1134	#endif
453		1135
454	/*****************************************************************************/	1136	/*****************************************************************************/
455		1137
		1138	#if EV_USE_PORT
		1139	# include "ev_port.c"
		1140	#endif
		1141	#if EV_USE_KQUEUE
		1142	# include "ev_kqueue.c"
		1143	#endif
456	#if EV_USE_EPOLL	1144	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	1145	# include "ev_epoll.c"
458	#endif	1146	#endif
		1147	#if EV_USE_POLL
		1148	# include "ev_poll.c"
		1149	#endif
459	#if EV_USE_SELECT	1150	#if EV_USE_SELECT
460	# include "ev_select.c"	1151	# include "ev_select.c"
461	#endif	1152	#endif
462		1153
463	int	1154	int
…		…
470	ev_version_minor (void)	1161	ev_version_minor (void)
471	{	1162	{
472	return EV_VERSION_MINOR;	1163	return EV_VERSION_MINOR;
473	}	1164	}
474		1165
475	int ev_init (int flags)	1166	/* return true if we are running with elevated privileges and should ignore env variables */
		1167	int inline_size
		1168	enable_secure (void)
476	{	1169	{
477	if (!ev_method)	1170	#ifdef _WIN32
		1171	return 0;
		1172	#else
		1173	return getuid () != geteuid ()
		1174	|| getgid () != getegid ();
		1175	#endif
		1176	}
		1177
		1178	unsigned int
		1179	ev_supported_backends (void)
		1180	{
		1181	unsigned int flags = 0;
		1182
		1183	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1184	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1185	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1186	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1187	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1188
		1189	return flags;
		1190	}
		1191
		1192	unsigned int
		1193	ev_recommended_backends (void)
		1194	{
		1195	unsigned int flags = ev_supported_backends ();
		1196
		1197	#ifndef __NetBSD__
		1198	/* kqueue is borked on everything but netbsd apparently */
		1199	/* it usually doesn't work correctly on anything but sockets and pipes */
		1200	flags &= ~EVBACKEND_KQUEUE;
		1201	#endif
		1202	#ifdef __APPLE__
		1203	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1204	flags &= ~EVBACKEND_POLL;
		1205	#endif
		1206
		1207	return flags;
		1208	}
		1209
		1210	unsigned int
		1211	ev_embeddable_backends (void)
		1212	{
		1213	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1214
		1215	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1216	/* please fix it and tell me how to detect the fix */
		1217	flags &= ~EVBACKEND_EPOLL;
		1218
		1219	return flags;
		1220	}
		1221
		1222	unsigned int
		1223	ev_backend (EV_P)
		1224	{
		1225	return backend;
		1226	}
		1227
		1228	unsigned int
		1229	ev_loop_count (EV_P)
		1230	{
		1231	return loop_count;
		1232	}
		1233
		1234	void
		1235	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1236	{
		1237	io_blocktime = interval;
		1238	}
		1239
		1240	void
		1241	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1242	{
		1243	timeout_blocktime = interval;
		1244	}
		1245
		1246	static void noinline
		1247	loop_init (EV_P_ unsigned int flags)
		1248	{
		1249	if (!backend)
478	{	1250	{
479	#if EV_USE_MONOTONIC	1251	#if EV_USE_MONOTONIC
480	{	1252	{
481	struct timespec ts;	1253	struct timespec ts;
482	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1254	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
483	have_monotonic = 1;	1255	have_monotonic = 1;
484	}	1256	}
485	#endif	1257	#endif
486		1258
487	ev_now = ev_time ();	1259	ev_rt_now = ev_time ();
488	now = get_clock ();	1260	mn_now = get_clock ();
489	now_floor = now;	1261	now_floor = mn_now;
490	diff = ev_now - now;	1262	rtmn_diff = ev_rt_now - mn_now;
491		1263
492	if (pipe (sigpipe))	1264	io_blocktime = 0.;
493	return 0;	1265	timeout_blocktime = 0.;
		1266	backend = 0;
		1267	backend_fd = -1;
		1268	gotasync = 0;
		1269	#if EV_USE_INOTIFY
		1270	fs_fd = -2;
		1271	#endif
494		1272
495	ev_method = EVMETHOD_NONE;	1273	/* pid check not overridable via env */
		1274	#ifndef _WIN32
		1275	if (flags & EVFLAG_FORKCHECK)
		1276	curpid = getpid ();
		1277	#endif
		1278
		1279	if (!(flags & EVFLAG_NOENV)
		1280	&& !enable_secure ()
		1281	&& getenv ("LIBEV_FLAGS"))
		1282	flags = atoi (getenv ("LIBEV_FLAGS"));
		1283
		1284	if (!(flags & 0x0000ffffU))
		1285	flags |= ev_recommended_backends ();
		1286
		1287	#if EV_USE_PORT
		1288	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1289	#endif
		1290	#if EV_USE_KQUEUE
		1291	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1292	#endif
496	#if EV_USE_EPOLL	1293	#if EV_USE_EPOLL
497	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1294	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1295	#endif
		1296	#if EV_USE_POLL
		1297	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
498	#endif	1298	#endif
499	#if EV_USE_SELECT	1299	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	1300	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
501	#endif	1301	#endif
502		1302
503	if (ev_method)	1303	ev_init (&pipeev, pipecb);
		1304	ev_set_priority (&pipeev, EV_MAXPRI);
		1305	}
		1306	}
		1307
		1308	static void noinline
		1309	loop_destroy (EV_P)
		1310	{
		1311	int i;
		1312
		1313	if (ev_is_active (&pipeev))
		1314	{
		1315	ev_ref (EV_A); /* signal watcher */
		1316	ev_io_stop (EV_A_ &pipeev);
		1317
		1318	#if EV_USE_EVENTFD
		1319	if (evfd >= 0)
		1320	close (evfd);
		1321	#endif
		1322
		1323	if (evpipe [0] >= 0)
504	{	1324	{
505	ev_watcher_init (&sigev, sigcb);	1325	close (evpipe [0]);
506	siginit ();	1326	close (evpipe [1]);
		1327	}
		1328	}
507		1329
		1330	#if EV_USE_INOTIFY
		1331	if (fs_fd >= 0)
		1332	close (fs_fd);
		1333	#endif
		1334
		1335	if (backend_fd >= 0)
		1336	close (backend_fd);
		1337
		1338	#if EV_USE_PORT
		1339	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1340	#endif
		1341	#if EV_USE_KQUEUE
		1342	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1343	#endif
		1344	#if EV_USE_EPOLL
		1345	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1346	#endif
		1347	#if EV_USE_POLL
		1348	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1349	#endif
		1350	#if EV_USE_SELECT
		1351	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1352	#endif
		1353
		1354	for (i = NUMPRI; i--; )
		1355	{
		1356	array_free (pending, [i]);
		1357	#if EV_IDLE_ENABLE
		1358	array_free (idle, [i]);
		1359	#endif
		1360	}
		1361
		1362	ev_free (anfds); anfdmax = 0;
		1363
		1364	/* have to use the microsoft-never-gets-it-right macro */
		1365	array_free (fdchange, EMPTY);
		1366	array_free (timer, EMPTY);
		1367	#if EV_PERIODIC_ENABLE
		1368	array_free (periodic, EMPTY);
		1369	#endif
		1370	#if EV_FORK_ENABLE
		1371	array_free (fork, EMPTY);
		1372	#endif
		1373	array_free (prepare, EMPTY);
		1374	array_free (check, EMPTY);
		1375	#if EV_ASYNC_ENABLE
		1376	array_free (async, EMPTY);
		1377	#endif
		1378
		1379	backend = 0;
		1380	}
		1381
		1382	#if EV_USE_INOTIFY
		1383	void inline_size infy_fork (EV_P);
		1384	#endif
		1385
		1386	void inline_size
		1387	loop_fork (EV_P)
		1388	{
		1389	#if EV_USE_PORT
		1390	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1391	#endif
		1392	#if EV_USE_KQUEUE
		1393	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1394	#endif
		1395	#if EV_USE_EPOLL
		1396	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1397	#endif
		1398	#if EV_USE_INOTIFY
		1399	infy_fork (EV_A);
		1400	#endif
		1401
		1402	if (ev_is_active (&pipeev))
		1403	{
		1404	/* this "locks" the handlers against writing to the pipe */
		1405	/* while we modify the fd vars */
		1406	gotsig = 1;
		1407	#if EV_ASYNC_ENABLE
		1408	gotasync = 1;
		1409	#endif
		1410
		1411	ev_ref (EV_A);
		1412	ev_io_stop (EV_A_ &pipeev);
		1413
		1414	#if EV_USE_EVENTFD
		1415	if (evfd >= 0)
		1416	close (evfd);
		1417	#endif
		1418
		1419	if (evpipe [0] >= 0)
		1420	{
		1421	close (evpipe [0]);
		1422	close (evpipe [1]);
		1423	}
		1424
		1425	evpipe_init (EV_A);
		1426	/* now iterate over everything, in case we missed something */
		1427	pipecb (EV_A_ &pipeev, EV_READ);
		1428	}
		1429
		1430	postfork = 0;
		1431	}
		1432
		1433	#if EV_MULTIPLICITY
		1434	struct ev_loop *
		1435	ev_loop_new (unsigned int flags)
		1436	{
		1437	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1438
		1439	memset (loop, 0, sizeof (struct ev_loop));
		1440
		1441	loop_init (EV_A_ flags);
		1442
		1443	if (ev_backend (EV_A))
		1444	return loop;
		1445
		1446	return 0;
		1447	}
		1448
		1449	void
		1450	ev_loop_destroy (EV_P)
		1451	{
		1452	loop_destroy (EV_A);
		1453	ev_free (loop);
		1454	}
		1455
		1456	void
		1457	ev_loop_fork (EV_P)
		1458	{
		1459	postfork = 1; /* must be in line with ev_default_fork */
		1460	}
		1461	#endif
		1462
		1463	#if EV_MULTIPLICITY
		1464	struct ev_loop *
		1465	ev_default_loop_init (unsigned int flags)
		1466	#else
		1467	int
		1468	ev_default_loop (unsigned int flags)
		1469	#endif
		1470	{
		1471	if (!ev_default_loop_ptr)
		1472	{
		1473	#if EV_MULTIPLICITY
		1474	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1475	#else
		1476	ev_default_loop_ptr = 1;
		1477	#endif
		1478
		1479	loop_init (EV_A_ flags);
		1480
		1481	if (ev_backend (EV_A))
		1482	{
		1483	#ifndef _WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	1484	ev_signal_init (&childev, childcb, SIGCHLD);
		1485	ev_set_priority (&childev, EV_MAXPRI);
509	ev_signal_start (&childev);	1486	ev_signal_start (EV_A_ &childev);
		1487	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1488	#endif
510	}	1489	}
		1490	else
		1491	ev_default_loop_ptr = 0;
511	}	1492	}
512		1493
513	return ev_method;	1494	return ev_default_loop_ptr;
		1495	}
		1496
		1497	void
		1498	ev_default_destroy (void)
		1499	{
		1500	#if EV_MULTIPLICITY
		1501	struct ev_loop *loop = ev_default_loop_ptr;
		1502	#endif
		1503
		1504	#ifndef _WIN32
		1505	ev_ref (EV_A); /* child watcher */
		1506	ev_signal_stop (EV_A_ &childev);
		1507	#endif
		1508
		1509	loop_destroy (EV_A);
		1510	}
		1511
		1512	void
		1513	ev_default_fork (void)
		1514	{
		1515	#if EV_MULTIPLICITY
		1516	struct ev_loop *loop = ev_default_loop_ptr;
		1517	#endif
		1518
		1519	if (backend)
		1520	postfork = 1; /* must be in line with ev_loop_fork */
514	}	1521	}
515		1522
516	/*****************************************************************************/	1523	/*****************************************************************************/
517		1524
518	void	1525	void
519	ev_fork_prepare (void)	1526	ev_invoke (EV_P_ void *w, int revents)
520	{	1527	{
521	/* nop */	1528	EV_CB_INVOKE ((W)w, revents);
522	}	1529	}
523		1530
524	void	1531	void inline_speed
525	ev_fork_parent (void)
526	{
527	/* nop */
528	}
529
530	void
531	ev_fork_child (void)
532	{
533	#if EV_USE_EPOLL
534	if (ev_method == EVMETHOD_EPOLL)
535	epoll_postfork_child ();
536	#endif
537
538	ev_io_stop (&sigev);
539	close (sigpipe [0]);
540	close (sigpipe [1]);
541	pipe (sigpipe);
542	siginit ();
543	}
544
545	/*****************************************************************************/
546
547	static void
548	call_pending (void)	1532	call_pending (EV_P)
549	{	1533	{
		1534	int pri;
		1535
		1536	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	1537	while (pendingcnt [pri])
551	{	1538	{
552	ANPENDING *p = pendings + --pendingcnt;	1539	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		1540
554	if (p->w)	1541	if (expect_true (p->w))
		1542	{
		1543	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1544
		1545	p->w->pending = 0;
		1546	EV_CB_INVOKE (p->w, p->events);
		1547	}
		1548	}
		1549	}
		1550
		1551	#if EV_IDLE_ENABLE
		1552	void inline_size
		1553	idle_reify (EV_P)
		1554	{
		1555	if (expect_false (idleall))
		1556	{
		1557	int pri;
		1558
		1559	for (pri = NUMPRI; pri--; )
555	{	1560	{
556	p->w->pending = 0;	1561	if (pendingcnt [pri])
557	p->w->cb (p->w, p->events);	1562	break;
		1563
		1564	if (idlecnt [pri])
		1565	{
		1566	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1567	break;
		1568	}
558	}	1569	}
559	}	1570	}
560	}	1571	}
		1572	#endif
561		1573
562	static void	1574	void inline_size
563	timers_reify (void)	1575	timers_reify (EV_P)
564	{	1576	{
565	while (timercnt && timers [0]->at <= now)	1577	while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
566	{	1578	{
567	struct ev_timer *w = timers [0];	1579	ev_timer *w = (ev_timer *)timers [HEAP0];
		1580
		1581	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
568		1582
569	/* first reschedule or stop timer */	1583	/* first reschedule or stop timer */
570	if (w->repeat)	1584	if (w->repeat)
571	{	1585	{
572	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1586	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
573	w->at = now + w->repeat;	1587
		1588	ev_at (w) += w->repeat;
		1589	if (ev_at (w) < mn_now)
		1590	ev_at (w) = mn_now;
		1591
574	downheap ((WT *)timers, timercnt, 0);	1592	downheap (timers, timercnt, HEAP0);
575	}	1593	}
576	else	1594	else
577	ev_timer_stop (w); /* nonrepeating: stop timer */	1595	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
578		1596
579	event ((W)w, EV_TIMEOUT);	1597	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
580	}	1598	}
581	}	1599	}
582		1600
583	static void	1601	#if EV_PERIODIC_ENABLE
		1602	void inline_size
584	periodics_reify (void)	1603	periodics_reify (EV_P)
585	{	1604	{
586	while (periodiccnt && periodics [0]->at <= ev_now)	1605	while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
587	{	1606	{
588	struct ev_periodic *w = periodics [0];	1607	ev_periodic *w = (ev_periodic *)periodics [HEAP0];
		1608
		1609	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
589		1610
590	/* first reschedule or stop timer */	1611	/* first reschedule or stop timer */
591	if (w->interval)	1612	if (w->reschedule_cb)
592	{	1613	{
		1614	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1615	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1616	downheap (periodics, periodiccnt, 1);
		1617	}
		1618	else if (w->interval)
		1619	{
593	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1620	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1621	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
594	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1622	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
595	downheap ((WT *)periodics, periodiccnt, 0);	1623	downheap (periodics, periodiccnt, HEAP0);
596	}	1624	}
597	else	1625	else
598	ev_periodic_stop (w); /* nonrepeating: stop timer */	1626	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
599		1627
600	event ((W)w, EV_PERIODIC);	1628	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
601	}	1629	}
602	}	1630	}
603		1631
604	static void	1632	static void noinline
605	periodics_reschedule (ev_tstamp diff)	1633	periodics_reschedule (EV_P)
606	{	1634	{
607	int i;	1635	int i;
608		1636
609	/* adjust periodics after time jump */	1637	/* adjust periodics after time jump */
610	for (i = 0; i < periodiccnt; ++i)	1638	for (i = 1; i <= periodiccnt; ++i)
611	{	1639	{
612	struct ev_periodic *w = periodics [i];	1640	ev_periodic *w = (ev_periodic *)periodics [i];
613		1641
		1642	if (w->reschedule_cb)
		1643	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
614	if (w->interval)	1644	else if (w->interval)
615	{
616	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1645	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
617
618	if (fabs (diff) >= 1e-4)
619	{
620	ev_periodic_stop (w);
621	ev_periodic_start (w);
622
623	i = 0; /* restart loop, inefficient, but time jumps should be rare */
624	}
625	}
626	}
627	}
628
629	static int
630	time_update_monotonic (void)
631	{
632	now = get_clock ();
633
634	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
635	{	1646	}
636	ev_now = now + diff;
637	return 0;
638	}
639	else
640	{
641	now_floor = now;
642	ev_now = ev_time ();
643	return 1;
644	}
645	}
646		1647
647	static void	1648	/* now rebuild the heap */
648	time_update (void)	1649	for (i = periodiccnt >> 1; --i; )
		1650	downheap (periodics, periodiccnt, i + HEAP0);
		1651	}
		1652	#endif
		1653
		1654	void inline_speed
		1655	time_update (EV_P_ ev_tstamp max_block)
649	{	1656	{
650	int i;	1657	int i;
651		1658
652	#if EV_USE_MONOTONIC	1659	#if EV_USE_MONOTONIC
653	if (expect_true (have_monotonic))	1660	if (expect_true (have_monotonic))
654	{	1661	{
655	if (time_update_monotonic ())	1662	ev_tstamp odiff = rtmn_diff;
		1663
		1664	mn_now = get_clock ();
		1665
		1666	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1667	/* interpolate in the meantime */
		1668	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
656	{	1669	{
657	ev_tstamp odiff = diff;	1670	ev_rt_now = rtmn_diff + mn_now;
658		1671	return;
659	for (i = 4; --i; ) /* loop a few times, before making important decisions */
660	{
661	diff = ev_now - now;
662
663	if (fabs (odiff - diff) < MIN_TIMEJUMP)
664	return; /* all is well */
665
666	ev_now = ev_time ();
667	now = get_clock ();
668	now_floor = now;
669	}
670
671	periodics_reschedule (diff - odiff);
672	/* no timer adjustment, as the monotonic clock doesn't jump */
673	}	1672	}
		1673
		1674	now_floor = mn_now;
		1675	ev_rt_now = ev_time ();
		1676
		1677	/* loop a few times, before making important decisions.
		1678	* on the choice of "4": one iteration isn't enough,
		1679	* in case we get preempted during the calls to
		1680	* ev_time and get_clock. a second call is almost guaranteed
		1681	* to succeed in that case, though. and looping a few more times
		1682	* doesn't hurt either as we only do this on time-jumps or
		1683	* in the unlikely event of having been preempted here.
		1684	*/
		1685	for (i = 4; --i; )
		1686	{
		1687	rtmn_diff = ev_rt_now - mn_now;
		1688
		1689	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1690	return; /* all is well */
		1691
		1692	ev_rt_now = ev_time ();
		1693	mn_now = get_clock ();
		1694	now_floor = mn_now;
		1695	}
		1696
		1697	# if EV_PERIODIC_ENABLE
		1698	periodics_reschedule (EV_A);
		1699	# endif
		1700	/* no timer adjustment, as the monotonic clock doesn't jump */
		1701	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
674	}	1702	}
675	else	1703	else
676	#endif	1704	#endif
677	{	1705	{
678	ev_now = ev_time ();	1706	ev_rt_now = ev_time ();
679		1707
680	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1708	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
681	{	1709	{
		1710	#if EV_PERIODIC_ENABLE
682	periodics_reschedule (ev_now - now);	1711	periodics_reschedule (EV_A);
683		1712	#endif
684	/* adjust timers. this is easy, as the offset is the same for all */	1713	/* adjust timers. this is easy, as the offset is the same for all of them */
685	for (i = 0; i < timercnt; ++i)	1714	for (i = 1; i <= timercnt; ++i)
686	timers [i]->at += diff;	1715	ev_at (timers [i]) += ev_rt_now - mn_now;
687	}	1716	}
688		1717
689	now = ev_now;	1718	mn_now = ev_rt_now;
690	}	1719	}
691	}	1720	}
692		1721
693	int ev_loop_done;	1722	void
		1723	ev_ref (EV_P)
		1724	{
		1725	++activecnt;
		1726	}
694		1727
		1728	void
		1729	ev_unref (EV_P)
		1730	{
		1731	--activecnt;
		1732	}
		1733
		1734	static int loop_done;
		1735
		1736	void
695	void ev_loop (int flags)	1737	ev_loop (EV_P_ int flags)
696	{	1738	{
697	double block;	1739	loop_done = EVUNLOOP_CANCEL;
698	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1740
		1741	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
699		1742
700	do	1743	do
701	{	1744	{
		1745	#ifndef _WIN32
		1746	if (expect_false (curpid)) /* penalise the forking check even more */
		1747	if (expect_false (getpid () != curpid))
		1748	{
		1749	curpid = getpid ();
		1750	postfork = 1;
		1751	}
		1752	#endif
		1753
		1754	#if EV_FORK_ENABLE
		1755	/* we might have forked, so queue fork handlers */
		1756	if (expect_false (postfork))
		1757	if (forkcnt)
		1758	{
		1759	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1760	call_pending (EV_A);
		1761	}
		1762	#endif
		1763
702	/* queue check watchers (and execute them) */	1764	/* queue prepare watchers (and execute them) */
703	if (expect_false (preparecnt))	1765	if (expect_false (preparecnt))
704	{	1766	{
705	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1767	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
706	call_pending ();	1768	call_pending (EV_A);
707	}	1769	}
708		1770
		1771	if (expect_false (!activecnt))
		1772	break;
		1773
		1774	/* we might have forked, so reify kernel state if necessary */
		1775	if (expect_false (postfork))
		1776	loop_fork (EV_A);
		1777
709	/* update fd-related kernel structures */	1778	/* update fd-related kernel structures */
710	fd_reify ();	1779	fd_reify (EV_A);
711		1780
712	/* calculate blocking time */	1781	/* calculate blocking time */
		1782	{
		1783	ev_tstamp waittime = 0.;
		1784	ev_tstamp sleeptime = 0.;
713		1785
714	/* we only need this for !monotonic clockor timers, but as we basically	1786	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
715	always have timers, we just calculate it always */
716	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))
718	time_update_monotonic ();
719	else
720	#endif
721	{	1787	{
722	ev_now = ev_time ();	1788	/* update time to cancel out callback processing overhead */
723	now = ev_now;	1789	time_update (EV_A_ 1e100);
724	}
725		1790
726	if (flags & EVLOOP_NONBLOCK || idlecnt)
727	block = 0.;
728	else
729	{
730	block = MAX_BLOCKTIME;	1791	waittime = MAX_BLOCKTIME;
731		1792
732	if (timercnt)	1793	if (timercnt)
733	{	1794	{
734	ev_tstamp to = timers [0]->at - now + method_fudge;	1795	ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
735	if (block > to) block = to;	1796	if (waittime > to) waittime = to;
736	}	1797	}
737		1798
		1799	#if EV_PERIODIC_ENABLE
738	if (periodiccnt)	1800	if (periodiccnt)
739	{	1801	{
740	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1802	ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
741	if (block > to) block = to;	1803	if (waittime > to) waittime = to;
742	}	1804	}
		1805	#endif
743		1806
744	if (block < 0.) block = 0.;	1807	if (expect_false (waittime < timeout_blocktime))
		1808	waittime = timeout_blocktime;
		1809
		1810	sleeptime = waittime - backend_fudge;
		1811
		1812	if (expect_true (sleeptime > io_blocktime))
		1813	sleeptime = io_blocktime;
		1814
		1815	if (sleeptime)
		1816	{
		1817	ev_sleep (sleeptime);
		1818	waittime -= sleeptime;
		1819	}
745	}	1820	}
746		1821
747	method_poll (block);	1822	++loop_count;
		1823	backend_poll (EV_A_ waittime);
748		1824
749	/* update ev_now, do magic */	1825	/* update ev_rt_now, do magic */
750	time_update ();	1826	time_update (EV_A_ waittime + sleeptime);
		1827	}
751		1828
752	/* queue pending timers and reschedule them */	1829	/* queue pending timers and reschedule them */
753	timers_reify (); /* relative timers called last */	1830	timers_reify (EV_A); /* relative timers called last */
		1831	#if EV_PERIODIC_ENABLE
754	periodics_reify (); /* absolute timers called first */	1832	periodics_reify (EV_A); /* absolute timers called first */
		1833	#endif
755		1834
		1835	#if EV_IDLE_ENABLE
756	/* queue idle watchers unless io or timers are pending */	1836	/* queue idle watchers unless other events are pending */
757	if (!pendingcnt)	1837	idle_reify (EV_A);
758	queue_events ((W *)idles, idlecnt, EV_IDLE);	1838	#endif
759		1839
760	/* queue check watchers, to be executed first */	1840	/* queue check watchers, to be executed first */
761	if (checkcnt)	1841	if (expect_false (checkcnt))
762	queue_events ((W *)checks, checkcnt, EV_CHECK);	1842	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
763		1843
764	call_pending ();	1844	call_pending (EV_A);
765	}	1845	}
766	while (!ev_loop_done);	1846	while (expect_true (
		1847	activecnt
		1848	&& !loop_done
		1849	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1850	));
767		1851
768	if (ev_loop_done != 2)	1852	if (loop_done == EVUNLOOP_ONE)
		1853	loop_done = EVUNLOOP_CANCEL;
		1854	}
		1855
		1856	void
		1857	ev_unloop (EV_P_ int how)
		1858	{
769	ev_loop_done = 0;	1859	loop_done = how;
770	}	1860	}
771		1861
772	/*****************************************************************************/	1862	/*****************************************************************************/
773		1863
774	static void	1864	void inline_size
775	wlist_add (WL *head, WL elem)	1865	wlist_add (WL *head, WL elem)
776	{	1866	{
777	elem->next = *head;	1867	elem->next = *head;
778	*head = elem;	1868	*head = elem;
779	}	1869	}
780		1870
781	static void	1871	void inline_size
782	wlist_del (WL *head, WL elem)	1872	wlist_del (WL *head, WL elem)
783	{	1873	{
784	while (*head)	1874	while (*head)
785	{	1875	{
786	if (*head == elem)	1876	if (*head == elem)
…		…
791		1881
792	head = &(*head)->next;	1882	head = &(*head)->next;
793	}	1883	}
794	}	1884	}
795		1885
796	static void	1886	void inline_speed
797	ev_clear_pending (W w)	1887	clear_pending (EV_P_ W w)
798	{	1888	{
799	if (w->pending)	1889	if (w->pending)
800	{	1890	{
801	pendings [w->pending - 1].w = 0;	1891	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	1892	w->pending = 0;
803	}	1893	}
804	}	1894	}
805		1895
806	static void	1896	int
		1897	ev_clear_pending (EV_P_ void *w)
		1898	{
		1899	W w_ = (W)w;
		1900	int pending = w_->pending;
		1901
		1902	if (expect_true (pending))
		1903	{
		1904	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1905	w_->pending = 0;
		1906	p->w = 0;
		1907	return p->events;
		1908	}
		1909	else
		1910	return 0;
		1911	}
		1912
		1913	void inline_size
		1914	pri_adjust (EV_P_ W w)
		1915	{
		1916	int pri = w->priority;
		1917	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1918	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1919	w->priority = pri;
		1920	}
		1921
		1922	void inline_speed
807	ev_start (W w, int active)	1923	ev_start (EV_P_ W w, int active)
808	{	1924	{
		1925	pri_adjust (EV_A_ w);
809	w->active = active;	1926	w->active = active;
		1927	ev_ref (EV_A);
810	}	1928	}
811		1929
812	static void	1930	void inline_size
813	ev_stop (W w)	1931	ev_stop (EV_P_ W w)
814	{	1932	{
		1933	ev_unref (EV_A);
815	w->active = 0;	1934	w->active = 0;
816	}	1935	}
817		1936
818	/*****************************************************************************/	1937	/*****************************************************************************/
819		1938
820	void	1939	void noinline
821	ev_io_start (struct ev_io *w)	1940	ev_io_start (EV_P_ ev_io *w)
822	{	1941	{
823	int fd = w->fd;	1942	int fd = w->fd;
824		1943
825	if (ev_is_active (w))	1944	if (expect_false (ev_is_active (w)))
826	return;	1945	return;
827		1946
828	assert (("ev_io_start called with negative fd", fd >= 0));	1947	assert (("ev_io_start called with negative fd", fd >= 0));
829		1948
830	ev_start ((W)w, 1);	1949	ev_start (EV_A_ (W)w, 1);
831	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1950	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
832	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1951	wlist_add (&anfds[fd].head, (WL)w);
833		1952
834	fd_change (fd);	1953	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1954	w->events &= ~EV_IOFDSET;
835	}	1955	}
836		1956
837	void	1957	void noinline
838	ev_io_stop (struct ev_io *w)	1958	ev_io_stop (EV_P_ ev_io *w)
839	{	1959	{
840	ev_clear_pending ((W)w);	1960	clear_pending (EV_A_ (W)w);
841	if (!ev_is_active (w))	1961	if (expect_false (!ev_is_active (w)))
842	return;	1962	return;
843		1963
		1964	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1965
844	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1966	wlist_del (&anfds[w->fd].head, (WL)w);
845	ev_stop ((W)w);	1967	ev_stop (EV_A_ (W)w);
846		1968
847	fd_change (w->fd);	1969	fd_change (EV_A_ w->fd, 1);
848	}	1970	}
849		1971
850	void	1972	void noinline
851	ev_timer_start (struct ev_timer *w)	1973	ev_timer_start (EV_P_ ev_timer *w)
852	{	1974	{
853	if (ev_is_active (w))	1975	if (expect_false (ev_is_active (w)))
854	return;	1976	return;
855		1977
856	w->at += now;	1978	ev_at (w) += mn_now;
857		1979
858	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1980	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859		1981
860	ev_start ((W)w, ++timercnt);	1982	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
861	array_needsize (timers, timermax, timercnt, );	1983	array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
862	timers [timercnt - 1] = w;	1984	timers [ev_active (w)] = (WT)w;
863	upheap ((WT *)timers, timercnt - 1);	1985	upheap (timers, ev_active (w));
864	}
865		1986
866	void	1987	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1988	}
		1989
		1990	void noinline
867	ev_timer_stop (struct ev_timer *w)	1991	ev_timer_stop (EV_P_ ev_timer *w)
868	{	1992	{
869	ev_clear_pending ((W)w);	1993	clear_pending (EV_A_ (W)w);
870	if (!ev_is_active (w))	1994	if (expect_false (!ev_is_active (w)))
871	return;	1995	return;
872		1996
873	if (w->active < timercnt--)	1997	{
		1998	int active = ev_active (w);
		1999
		2000	assert (("internal timer heap corruption", timers [active] == (WT)w));
		2001
		2002	if (expect_true (active < timercnt + HEAP0 - 1))
874	{	2003	{
875	timers [w->active - 1] = timers [timercnt];	2004	timers [active] = timers [timercnt + HEAP0 - 1];
876	downheap ((WT *)timers, timercnt, w->active - 1);	2005	adjustheap (timers, timercnt, active);
877	}	2006	}
878		2007
879	w->at = w->repeat;	2008	--timercnt;
		2009	}
880		2010
		2011	ev_at (w) -= mn_now;
		2012
881	ev_stop ((W)w);	2013	ev_stop (EV_A_ (W)w);
882	}	2014	}
883		2015
884	void	2016	void noinline
885	ev_timer_again (struct ev_timer *w)	2017	ev_timer_again (EV_P_ ev_timer *w)
886	{	2018	{
887	if (ev_is_active (w))	2019	if (ev_is_active (w))
888	{	2020	{
889	if (w->repeat)	2021	if (w->repeat)
890	{	2022	{
891	w->at = now + w->repeat;	2023	ev_at (w) = mn_now + w->repeat;
892	downheap ((WT *)timers, timercnt, w->active - 1);	2024	adjustheap (timers, timercnt, ev_active (w));
893	}	2025	}
894	else	2026	else
895	ev_timer_stop (w);	2027	ev_timer_stop (EV_A_ w);
896	}	2028	}
897	else if (w->repeat)	2029	else if (w->repeat)
		2030	{
		2031	ev_at (w) = w->repeat;
898	ev_timer_start (w);	2032	ev_timer_start (EV_A_ w);
		2033	}
899	}	2034	}
900		2035
901	void	2036	#if EV_PERIODIC_ENABLE
		2037	void noinline
902	ev_periodic_start (struct ev_periodic *w)	2038	ev_periodic_start (EV_P_ ev_periodic *w)
903	{	2039	{
904	if (ev_is_active (w))	2040	if (expect_false (ev_is_active (w)))
905	return;	2041	return;
906		2042
		2043	if (w->reschedule_cb)
		2044	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2045	else if (w->interval)
		2046	{
907	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2047	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908
909	/* this formula differs from the one in periodic_reify because we do not always round up */	2048	/* this formula differs from the one in periodic_reify because we do not always round up */
910	if (w->interval)
911	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	2049	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2050	}
		2051	else
		2052	ev_at (w) = w->offset;
912		2053
913	ev_start ((W)w, ++periodiccnt);	2054	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
914	array_needsize (periodics, periodicmax, periodiccnt, );	2055	array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
915	periodics [periodiccnt - 1] = w;	2056	periodics [ev_active (w)] = (WT)w;
916	upheap ((WT *)periodics, periodiccnt - 1);	2057	upheap (periodics, ev_active (w));
917	}
918		2058
919	void	2059	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
		2060	}
		2061
		2062	void noinline
920	ev_periodic_stop (struct ev_periodic *w)	2063	ev_periodic_stop (EV_P_ ev_periodic *w)
921	{	2064	{
922	ev_clear_pending ((W)w);	2065	clear_pending (EV_A_ (W)w);
923	if (!ev_is_active (w))	2066	if (expect_false (!ev_is_active (w)))
924	return;	2067	return;
925		2068
926	if (w->active < periodiccnt--)	2069	{
		2070	int active = ev_active (w);
		2071
		2072	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		2073
		2074	if (expect_true (active < periodiccnt + HEAP0 - 1))
927	{	2075	{
928	periodics [w->active - 1] = periodics [periodiccnt];	2076	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
929	downheap ((WT *)periodics, periodiccnt, w->active - 1);	2077	adjustheap (periodics, periodiccnt, active);
930	}	2078	}
931		2079
		2080	--periodiccnt;
		2081	}
		2082
932	ev_stop ((W)w);	2083	ev_stop (EV_A_ (W)w);
933	}	2084	}
934		2085
935	void	2086	void noinline
		2087	ev_periodic_again (EV_P_ ev_periodic *w)
		2088	{
		2089	/* TODO: use adjustheap and recalculation */
		2090	ev_periodic_stop (EV_A_ w);
		2091	ev_periodic_start (EV_A_ w);
		2092	}
		2093	#endif
		2094
		2095	#ifndef SA_RESTART
		2096	# define SA_RESTART 0
		2097	#endif
		2098
		2099	void noinline
936	ev_signal_start (struct ev_signal *w)	2100	ev_signal_start (EV_P_ ev_signal *w)
937	{	2101	{
		2102	#if EV_MULTIPLICITY
		2103	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2104	#endif
938	if (ev_is_active (w))	2105	if (expect_false (ev_is_active (w)))
939	return;	2106	return;
940		2107
941	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2108	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942		2109
943	ev_start ((W)w, 1);	2110	evpipe_init (EV_A);
		2111
		2112	{
		2113	#ifndef _WIN32
		2114	sigset_t full, prev;
		2115	sigfillset (&full);
		2116	sigprocmask (SIG_SETMASK, &full, &prev);
		2117	#endif
		2118
944	array_needsize (signals, signalmax, w->signum, signals_init);	2119	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2120
		2121	#ifndef _WIN32
		2122	sigprocmask (SIG_SETMASK, &prev, 0);
		2123	#endif
		2124	}
		2125
		2126	ev_start (EV_A_ (W)w, 1);
945	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2127	wlist_add (&signals [w->signum - 1].head, (WL)w);
946		2128
947	if (!w->next)	2129	if (!((WL)w)->next)
948	{	2130	{
		2131	#if _WIN32
		2132	signal (w->signum, ev_sighandler);
		2133	#else
949	struct sigaction sa;	2134	struct sigaction sa;
950	sa.sa_handler = sighandler;	2135	sa.sa_handler = ev_sighandler;
951	sigfillset (&sa.sa_mask);	2136	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	2137	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	2138	sigaction (w->signum, &sa, 0);
		2139	#endif
954	}	2140	}
955	}	2141	}
956		2142
957	void	2143	void noinline
958	ev_signal_stop (struct ev_signal *w)	2144	ev_signal_stop (EV_P_ ev_signal *w)
959	{	2145	{
960	ev_clear_pending ((W)w);	2146	clear_pending (EV_A_ (W)w);
961	if (!ev_is_active (w))	2147	if (expect_false (!ev_is_active (w)))
962	return;	2148	return;
963		2149
964	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2150	wlist_del (&signals [w->signum - 1].head, (WL)w);
965	ev_stop ((W)w);	2151	ev_stop (EV_A_ (W)w);
966		2152
967	if (!signals [w->signum - 1].head)	2153	if (!signals [w->signum - 1].head)
968	signal (w->signum, SIG_DFL);	2154	signal (w->signum, SIG_DFL);
969	}	2155	}
970		2156
971	void	2157	void
972	ev_idle_start (struct ev_idle *w)	2158	ev_child_start (EV_P_ ev_child *w)
973	{	2159	{
		2160	#if EV_MULTIPLICITY
		2161	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2162	#endif
974	if (ev_is_active (w))	2163	if (expect_false (ev_is_active (w)))
975	return;	2164	return;
976		2165
977	ev_start ((W)w, ++idlecnt);	2166	ev_start (EV_A_ (W)w, 1);
978	array_needsize (idles, idlemax, idlecnt, );	2167	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
979	idles [idlecnt - 1] = w;
980	}	2168	}
981		2169
982	void	2170	void
983	ev_idle_stop (struct ev_idle *w)	2171	ev_child_stop (EV_P_ ev_child *w)
984	{	2172	{
985	ev_clear_pending ((W)w);	2173	clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	2174	if (expect_false (!ev_is_active (w)))
987	return;	2175	return;
988		2176
989	idles [w->active - 1] = idles [--idlecnt];	2177	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	2178	ev_stop (EV_A_ (W)w);
991	}	2179	}
992		2180
993	void	2181	#if EV_STAT_ENABLE
994	ev_prepare_start (struct ev_prepare *w)	2182
		2183	# ifdef _WIN32
		2184	# undef lstat
		2185	# define lstat(a,b) _stati64 (a,b)
		2186	# endif
		2187
		2188	#define DEF_STAT_INTERVAL 5.0074891
		2189	#define MIN_STAT_INTERVAL 0.1074891
		2190
		2191	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2192
		2193	#if EV_USE_INOTIFY
		2194	# define EV_INOTIFY_BUFSIZE 8192
		2195
		2196	static void noinline
		2197	infy_add (EV_P_ ev_stat *w)
995	{	2198	{
996	if (ev_is_active (w))	2199	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);
		2200
		2201	if (w->wd < 0)
		2202	{
		2203	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2204
		2205	/* monitor some parent directory for speedup hints */
		2206	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2207	/* but an efficiency issue only */
		2208	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2209	{
		2210	char path [4096];
		2211	strcpy (path, w->path);
		2212
		2213	do
		2214	{
		2215	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2216	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2217
		2218	char *pend = strrchr (path, '/');
		2219
		2220	if (!pend)
		2221	break; /* whoops, no '/', complain to your admin */
		2222
		2223	*pend = 0;
		2224	w->wd = inotify_add_watch (fs_fd, path, mask);
		2225	}
		2226	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2227	}
		2228	}
		2229	else
		2230	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2231
		2232	if (w->wd >= 0)
		2233	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2234	}
		2235
		2236	static void noinline
		2237	infy_del (EV_P_ ev_stat *w)
		2238	{
		2239	int slot;
		2240	int wd = w->wd;
		2241
		2242	if (wd < 0)
997	return;	2243	return;
998		2244
		2245	w->wd = -2;
		2246	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2247	wlist_del (&fs_hash [slot].head, (WL)w);
		2248
		2249	/* remove this watcher, if others are watching it, they will rearm */
		2250	inotify_rm_watch (fs_fd, wd);
		2251	}
		2252
		2253	static void noinline
		2254	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2255	{
		2256	if (slot < 0)
		2257	/* overflow, need to check for all hahs slots */
		2258	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2259	infy_wd (EV_A_ slot, wd, ev);
		2260	else
		2261	{
		2262	WL w_;
		2263
		2264	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2265	{
		2266	ev_stat *w = (ev_stat *)w_;
		2267	w_ = w_->next; /* lets us remove this watcher and all before it */
		2268
		2269	if (w->wd == wd || wd == -1)
		2270	{
		2271	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2272	{
		2273	w->wd = -1;
		2274	infy_add (EV_A_ w); /* re-add, no matter what */
		2275	}
		2276
		2277	stat_timer_cb (EV_A_ &w->timer, 0);
		2278	}
		2279	}
		2280	}
		2281	}
		2282
		2283	static void
		2284	infy_cb (EV_P_ ev_io *w, int revents)
		2285	{
		2286	char buf [EV_INOTIFY_BUFSIZE];
		2287	struct inotify_event *ev = (struct inotify_event *)buf;
		2288	int ofs;
		2289	int len = read (fs_fd, buf, sizeof (buf));
		2290
		2291	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2292	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2293	}
		2294
		2295	void inline_size
		2296	infy_init (EV_P)
		2297	{
		2298	if (fs_fd != -2)
		2299	return;
		2300
		2301	fs_fd = inotify_init ();
		2302
		2303	if (fs_fd >= 0)
		2304	{
		2305	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2306	ev_set_priority (&fs_w, EV_MAXPRI);
		2307	ev_io_start (EV_A_ &fs_w);
		2308	}
		2309	}
		2310
		2311	void inline_size
		2312	infy_fork (EV_P)
		2313	{
		2314	int slot;
		2315
		2316	if (fs_fd < 0)
		2317	return;
		2318
		2319	close (fs_fd);
		2320	fs_fd = inotify_init ();
		2321
		2322	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2323	{
		2324	WL w_ = fs_hash [slot].head;
		2325	fs_hash [slot].head = 0;
		2326
		2327	while (w_)
		2328	{
		2329	ev_stat *w = (ev_stat *)w_;
		2330	w_ = w_->next; /* lets us add this watcher */
		2331
		2332	w->wd = -1;
		2333
		2334	if (fs_fd >= 0)
		2335	infy_add (EV_A_ w); /* re-add, no matter what */
		2336	else
		2337	ev_timer_start (EV_A_ &w->timer);
		2338	}
		2339
		2340	}
		2341	}
		2342
		2343	#endif
		2344
		2345	void
		2346	ev_stat_stat (EV_P_ ev_stat *w)
		2347	{
		2348	if (lstat (w->path, &w->attr) < 0)
		2349	w->attr.st_nlink = 0;
		2350	else if (!w->attr.st_nlink)
		2351	w->attr.st_nlink = 1;
		2352	}
		2353
		2354	static void noinline
		2355	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2356	{
		2357	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2358
		2359	/* we copy this here each the time so that */
		2360	/* prev has the old value when the callback gets invoked */
		2361	w->prev = w->attr;
		2362	ev_stat_stat (EV_A_ w);
		2363
		2364	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2365	if (
		2366	w->prev.st_dev != w->attr.st_dev
		2367	|| w->prev.st_ino != w->attr.st_ino
		2368	|| w->prev.st_mode != w->attr.st_mode
		2369	|| w->prev.st_nlink != w->attr.st_nlink
		2370	|| w->prev.st_uid != w->attr.st_uid
		2371	|| w->prev.st_gid != w->attr.st_gid
		2372	|| w->prev.st_rdev != w->attr.st_rdev
		2373	|| w->prev.st_size != w->attr.st_size
		2374	|| w->prev.st_atime != w->attr.st_atime
		2375	|| w->prev.st_mtime != w->attr.st_mtime
		2376	|| w->prev.st_ctime != w->attr.st_ctime
		2377	) {
		2378	#if EV_USE_INOTIFY
		2379	infy_del (EV_A_ w);
		2380	infy_add (EV_A_ w);
		2381	ev_stat_stat (EV_A_ w); /* avoid race... */
		2382	#endif
		2383
		2384	ev_feed_event (EV_A_ w, EV_STAT);
		2385	}
		2386	}
		2387
		2388	void
		2389	ev_stat_start (EV_P_ ev_stat *w)
		2390	{
		2391	if (expect_false (ev_is_active (w)))
		2392	return;
		2393
		2394	/* since we use memcmp, we need to clear any padding data etc. */
		2395	memset (&w->prev, 0, sizeof (ev_statdata));
		2396	memset (&w->attr, 0, sizeof (ev_statdata));
		2397
		2398	ev_stat_stat (EV_A_ w);
		2399
		2400	if (w->interval < MIN_STAT_INTERVAL)
		2401	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2402
		2403	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2404	ev_set_priority (&w->timer, ev_priority (w));
		2405
		2406	#if EV_USE_INOTIFY
		2407	infy_init (EV_A);
		2408
		2409	if (fs_fd >= 0)
		2410	infy_add (EV_A_ w);
		2411	else
		2412	#endif
		2413	ev_timer_start (EV_A_ &w->timer);
		2414
		2415	ev_start (EV_A_ (W)w, 1);
		2416	}
		2417
		2418	void
		2419	ev_stat_stop (EV_P_ ev_stat *w)
		2420	{
		2421	clear_pending (EV_A_ (W)w);
		2422	if (expect_false (!ev_is_active (w)))
		2423	return;
		2424
		2425	#if EV_USE_INOTIFY
		2426	infy_del (EV_A_ w);
		2427	#endif
		2428	ev_timer_stop (EV_A_ &w->timer);
		2429
		2430	ev_stop (EV_A_ (W)w);
		2431	}
		2432	#endif
		2433
		2434	#if EV_IDLE_ENABLE
		2435	void
		2436	ev_idle_start (EV_P_ ev_idle *w)
		2437	{
		2438	if (expect_false (ev_is_active (w)))
		2439	return;
		2440
		2441	pri_adjust (EV_A_ (W)w);
		2442
		2443	{
		2444	int active = ++idlecnt [ABSPRI (w)];
		2445
		2446	++idleall;
		2447	ev_start (EV_A_ (W)w, active);
		2448
		2449	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2450	idles [ABSPRI (w)][active - 1] = w;
		2451	}
		2452	}
		2453
		2454	void
		2455	ev_idle_stop (EV_P_ ev_idle *w)
		2456	{
		2457	clear_pending (EV_A_ (W)w);
		2458	if (expect_false (!ev_is_active (w)))
		2459	return;
		2460
		2461	{
		2462	int active = ev_active (w);
		2463
		2464	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2465	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2466
		2467	ev_stop (EV_A_ (W)w);
		2468	--idleall;
		2469	}
		2470	}
		2471	#endif
		2472
		2473	void
		2474	ev_prepare_start (EV_P_ ev_prepare *w)
		2475	{
		2476	if (expect_false (ev_is_active (w)))
		2477	return;
		2478
999	ev_start ((W)w, ++preparecnt);	2479	ev_start (EV_A_ (W)w, ++preparecnt);
1000	array_needsize (prepares, preparemax, preparecnt, );	2480	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1001	prepares [preparecnt - 1] = w;	2481	prepares [preparecnt - 1] = w;
1002	}	2482	}
1003		2483
1004	void	2484	void
1005	ev_prepare_stop (struct ev_prepare *w)	2485	ev_prepare_stop (EV_P_ ev_prepare *w)
1006	{	2486	{
1007	ev_clear_pending ((W)w);	2487	clear_pending (EV_A_ (W)w);
1008	if (ev_is_active (w))	2488	if (expect_false (!ev_is_active (w)))
1009	return;	2489	return;
1010		2490
		2491	{
		2492	int active = ev_active (w);
		2493
1011	prepares [w->active - 1] = prepares [--preparecnt];	2494	prepares [active - 1] = prepares [--preparecnt];
		2495	ev_active (prepares [active - 1]) = active;
		2496	}
		2497
1012	ev_stop ((W)w);	2498	ev_stop (EV_A_ (W)w);
1013	}	2499	}
1014		2500
1015	void	2501	void
1016	ev_check_start (struct ev_check *w)	2502	ev_check_start (EV_P_ ev_check *w)
1017	{	2503	{
1018	if (ev_is_active (w))	2504	if (expect_false (ev_is_active (w)))
1019	return;	2505	return;
1020		2506
1021	ev_start ((W)w, ++checkcnt);	2507	ev_start (EV_A_ (W)w, ++checkcnt);
1022	array_needsize (checks, checkmax, checkcnt, );	2508	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1023	checks [checkcnt - 1] = w;	2509	checks [checkcnt - 1] = w;
1024	}	2510	}
1025		2511
1026	void	2512	void
1027	ev_check_stop (struct ev_check *w)	2513	ev_check_stop (EV_P_ ev_check *w)
1028	{	2514	{
1029	ev_clear_pending ((W)w);	2515	clear_pending (EV_A_ (W)w);
1030	if (ev_is_active (w))	2516	if (expect_false (!ev_is_active (w)))
1031	return;	2517	return;
1032		2518
		2519	{
		2520	int active = ev_active (w);
		2521
1033	checks [w->active - 1] = checks [--checkcnt];	2522	checks [active - 1] = checks [--checkcnt];
		2523	ev_active (checks [active - 1]) = active;
		2524	}
		2525
1034	ev_stop ((W)w);	2526	ev_stop (EV_A_ (W)w);
1035	}	2527	}
1036		2528
1037	void	2529	#if EV_EMBED_ENABLE
1038	ev_child_start (struct ev_child *w)	2530	void noinline
		2531	ev_embed_sweep (EV_P_ ev_embed *w)
1039	{	2532	{
		2533	ev_loop (w->other, EVLOOP_NONBLOCK);
		2534	}
		2535
		2536	static void
		2537	embed_io_cb (EV_P_ ev_io *io, int revents)
		2538	{
		2539	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2540
1040	if (ev_is_active (w))	2541	if (ev_cb (w))
		2542	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2543	else
		2544	ev_loop (w->other, EVLOOP_NONBLOCK);
		2545	}
		2546
		2547	static void
		2548	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2549	{
		2550	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2551
		2552	{
		2553	struct ev_loop *loop = w->other;
		2554
		2555	while (fdchangecnt)
		2556	{
		2557	fd_reify (EV_A);
		2558	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2559	}
		2560	}
		2561	}
		2562
		2563	#if 0
		2564	static void
		2565	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2566	{
		2567	ev_idle_stop (EV_A_ idle);
		2568	}
		2569	#endif
		2570
		2571	void
		2572	ev_embed_start (EV_P_ ev_embed *w)
		2573	{
		2574	if (expect_false (ev_is_active (w)))
1041	return;	2575	return;
1042		2576
		2577	{
		2578	struct ev_loop *loop = w->other;
		2579	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2580	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2581	}
		2582
		2583	ev_set_priority (&w->io, ev_priority (w));
		2584	ev_io_start (EV_A_ &w->io);
		2585
		2586	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2587	ev_set_priority (&w->prepare, EV_MINPRI);
		2588	ev_prepare_start (EV_A_ &w->prepare);
		2589
		2590	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2591
1043	ev_start ((W)w, 1);	2592	ev_start (EV_A_ (W)w, 1);
1044	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1045	}	2593	}
1046		2594
1047	void	2595	void
1048	ev_child_stop (struct ev_child *w)	2596	ev_embed_stop (EV_P_ ev_embed *w)
1049	{	2597	{
1050	ev_clear_pending ((W)w);	2598	clear_pending (EV_A_ (W)w);
1051	if (ev_is_active (w))	2599	if (expect_false (!ev_is_active (w)))
1052	return;	2600	return;
1053		2601
1054	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2602	ev_io_stop (EV_A_ &w->io);
		2603	ev_prepare_stop (EV_A_ &w->prepare);
		2604
1055	ev_stop ((W)w);	2605	ev_stop (EV_A_ (W)w);
1056	}	2606	}
		2607	#endif
		2608
		2609	#if EV_FORK_ENABLE
		2610	void
		2611	ev_fork_start (EV_P_ ev_fork *w)
		2612	{
		2613	if (expect_false (ev_is_active (w)))
		2614	return;
		2615
		2616	ev_start (EV_A_ (W)w, ++forkcnt);
		2617	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2618	forks [forkcnt - 1] = w;
		2619	}
		2620
		2621	void
		2622	ev_fork_stop (EV_P_ ev_fork *w)
		2623	{
		2624	clear_pending (EV_A_ (W)w);
		2625	if (expect_false (!ev_is_active (w)))
		2626	return;
		2627
		2628	{
		2629	int active = ev_active (w);
		2630
		2631	forks [active - 1] = forks [--forkcnt];
		2632	ev_active (forks [active - 1]) = active;
		2633	}
		2634
		2635	ev_stop (EV_A_ (W)w);
		2636	}
		2637	#endif
		2638
		2639	#if EV_ASYNC_ENABLE
		2640	void
		2641	ev_async_start (EV_P_ ev_async *w)
		2642	{
		2643	if (expect_false (ev_is_active (w)))
		2644	return;
		2645
		2646	evpipe_init (EV_A);
		2647
		2648	ev_start (EV_A_ (W)w, ++asynccnt);
		2649	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2650	asyncs [asynccnt - 1] = w;
		2651	}
		2652
		2653	void
		2654	ev_async_stop (EV_P_ ev_async *w)
		2655	{
		2656	clear_pending (EV_A_ (W)w);
		2657	if (expect_false (!ev_is_active (w)))
		2658	return;
		2659
		2660	{
		2661	int active = ev_active (w);
		2662
		2663	asyncs [active - 1] = asyncs [--asynccnt];
		2664	ev_active (asyncs [active - 1]) = active;
		2665	}
		2666
		2667	ev_stop (EV_A_ (W)w);
		2668	}
		2669
		2670	void
		2671	ev_async_send (EV_P_ ev_async *w)
		2672	{
		2673	w->sent = 1;
		2674	evpipe_write (EV_A_ &gotasync);
		2675	}
		2676	#endif
1057		2677
1058	/*****************************************************************************/	2678	/*****************************************************************************/
1059		2679
1060	struct ev_once	2680	struct ev_once
1061	{	2681	{
1062	struct ev_io io;	2682	ev_io io;
1063	struct ev_timer to;	2683	ev_timer to;
1064	void (*cb)(int revents, void *arg);	2684	void (*cb)(int revents, void *arg);
1065	void *arg;	2685	void *arg;
1066	};	2686	};
1067		2687
1068	static void	2688	static void
1069	once_cb (struct ev_once *once, int revents)	2689	once_cb (EV_P_ struct ev_once *once, int revents)
1070	{	2690	{
1071	void (*cb)(int revents, void *arg) = once->cb;	2691	void (*cb)(int revents, void *arg) = once->cb;
1072	void *arg = once->arg;	2692	void *arg = once->arg;
1073		2693
1074	ev_io_stop (&once->io);	2694	ev_io_stop (EV_A_ &once->io);
1075	ev_timer_stop (&once->to);	2695	ev_timer_stop (EV_A_ &once->to);
1076	free (once);	2696	ev_free (once);
1077		2697
1078	cb (revents, arg);	2698	cb (revents, arg);
1079	}	2699	}
1080		2700
1081	static void	2701	static void
1082	once_cb_io (struct ev_io *w, int revents)	2702	once_cb_io (EV_P_ ev_io *w, int revents)
1083	{	2703	{
1084	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2704	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1085	}	2705	}
1086		2706
1087	static void	2707	static void
1088	once_cb_to (struct ev_timer *w, int revents)	2708	once_cb_to (EV_P_ ev_timer *w, int revents)
1089	{	2709	{
1090	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2710	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1091	}	2711	}
1092		2712
1093	void	2713	void
1094	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2714	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1095	{	2715	{
1096	struct ev_once *once = malloc (sizeof (struct ev_once));	2716	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1097		2717
1098	if (!once)	2718	if (expect_false (!once))
		2719	{
1099	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2720	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1100	else	2721	return;
1101	{	2722	}
		2723
1102	once->cb = cb;	2724	once->cb = cb;
1103	once->arg = arg;	2725	once->arg = arg;
1104		2726
1105	ev_watcher_init (&once->io, once_cb_io);	2727	ev_init (&once->io, once_cb_io);
1106	if (fd >= 0)	2728	if (fd >= 0)
1107	{	2729	{
1108	ev_io_set (&once->io, fd, events);	2730	ev_io_set (&once->io, fd, events);
1109	ev_io_start (&once->io);	2731	ev_io_start (EV_A_ &once->io);
1110	}	2732	}
1111		2733
1112	ev_watcher_init (&once->to, once_cb_to);	2734	ev_init (&once->to, once_cb_to);
1113	if (timeout >= 0.)	2735	if (timeout >= 0.)
1114	{	2736	{
1115	ev_timer_set (&once->to, timeout, 0.);	2737	ev_timer_set (&once->to, timeout, 0.);
1116	ev_timer_start (&once->to);	2738	ev_timer_start (EV_A_ &once->to);
1117	}
1118	}
1119	}
1120
1121	/*****************************************************************************/
1122
1123	#if 0
1124
1125	struct ev_io wio;
1126
1127	static void
1128	sin_cb (struct ev_io *w, int revents)
1129	{
1130	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1131	}
1132
1133	static void
1134	ocb (struct ev_timer *w, int revents)
1135	{
1136	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1137	ev_timer_stop (w);
1138	ev_timer_start (w);
1139	}
1140
1141	static void
1142	scb (struct ev_signal *w, int revents)
1143	{
1144	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1145	ev_io_stop (&wio);
1146	ev_io_start (&wio);
1147	}
1148
1149	static void
1150	gcb (struct ev_signal *w, int revents)
1151	{
1152	fprintf (stderr, "generic %x\n", revents);
1153
1154	}
1155
1156	int main (void)
1157	{
1158	ev_init (0);
1159
1160	ev_io_init (&wio, sin_cb, 0, EV_READ);
1161	ev_io_start (&wio);
1162
1163	struct ev_timer t[10000];
1164
1165	#if 0
1166	int i;
1167	for (i = 0; i < 10000; ++i)
1168	{	2739	}
1169	struct ev_timer *w = t + i;
1170	ev_watcher_init (w, ocb, i);
1171	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1172	ev_timer_start (w);
1173	if (drand48 () < 0.5)
1174	ev_timer_stop (w);
1175	}
1176	#endif
1177
1178	struct ev_timer t1;
1179	ev_timer_init (&t1, ocb, 5, 10);
1180	ev_timer_start (&t1);
1181
1182	struct ev_signal sig;
1183	ev_signal_init (&sig, scb, SIGQUIT);
1184	ev_signal_start (&sig);
1185
1186	struct ev_check cw;
1187	ev_check_init (&cw, gcb);
1188	ev_check_start (&cw);
1189
1190	struct ev_idle iw;
1191	ev_idle_init (&iw, gcb);
1192	ev_idle_start (&iw);
1193
1194	ev_loop (0);
1195
1196	return 0;
1197	}	2740	}
1198		2741
		2742	#if EV_MULTIPLICITY
		2743	#include "ev_wrap.h"
1199	#endif	2744	#endif
1200		2745
		2746	#ifdef __cplusplus
		2747	}
		2748	#endif
1201		2749
1202
1203

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