[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.85 by root, Sat Nov 10 03:13:50 2007 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		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	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	59	#include <fcntl.h>
5	#include <signal.h>	60	#include <stddef.h>
6		61
7	#include <stdio.h>	62	#include <stdio.h>
8		63
9	#include <assert.h>	64	#include <assert.h>
10	#include <errno.h>	65	#include <errno.h>
11	#include <sys/time.h>	66	#include <sys/types.h>
12	#include <time.h>	67	#include <time.h>
13		68
14	#define HAVE_EPOLL 1	69	#include <signal.h>
15		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
16	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
17	# ifdef CLOCK_MONOTONIC
18	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
19	# endif	105	# endif
20	#endif	106	#endif
21		107
22	#ifndef HAVE_SELECT
23	# define HAVE_SELECT 1
24	#endif
25
26	#ifndef HAVE_EPOLL
27	# define HAVE_EPOLL 0
28	#endif
29
30	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
32	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
33		125
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
36		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
37	#include "ev.h"	134	# include "ev.h"
		135	#endif
		136
		137	#if __GNUC__ >= 3
		138	# define expect(expr,value) __builtin_expect ((expr),(value))
		139	# define inline inline
		140	#else
		141	# define expect(expr,value) (expr)
		142	# define inline static
		143	#endif
		144
		145	#define expect_false(expr) expect ((expr) != 0, 0)
		146	#define expect_true(expr) expect ((expr) != 0, 1)
		147
		148	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		149	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
38		150
39	typedef struct ev_watcher *W;	151	typedef struct ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	152	typedef struct ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	153	typedef struct ev_watcher_time *WT;
42		154
43	static ev_tstamp now, diff; /* monotonic clock */	155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
44	ev_tstamp ev_now;
45	int ev_method;
46		156
47	static int have_monotonic; /* runtime */	157	#include "ev_win32.c"
48
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		158
53	/*****************************************************************************/	159	/*****************************************************************************/
54		160
55	ev_tstamp	161	static void (syserr_cb)(const char msg);
		162
		163	void ev_set_syserr_cb (void (cb)(const char msg))
		164	{
		165	syserr_cb = cb;
		166	}
		167
		168	static void
		169	syserr (const char *msg)
		170	{
		171	if (!msg)
		172	msg = "(libev) system error";
		173
		174	if (syserr_cb)
		175	syserr_cb (msg);
		176	else
		177	{
		178	perror (msg);
		179	abort ();
		180	}
		181	}
		182
		183	static void (alloc)(void *ptr, long size);
		184
		185	void ev_set_allocator (void (cb)(void *ptr, long size))
		186	{
		187	alloc = cb;
		188	}
		189
		190	static void *
		191	ev_realloc (void *ptr, long size)
		192	{
		193	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		194
		195	if (!ptr && size)
		196	{
		197	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		198	abort ();
		199	}
		200
		201	return ptr;
		202	}
		203
		204	#define ev_malloc(size) ev_realloc (0, (size))
		205	#define ev_free(ptr) ev_realloc ((ptr), 0)
		206
		207	/*****************************************************************************/
		208
		209	typedef struct
		210	{
		211	WL head;
		212	unsigned char events;
		213	unsigned char reify;
		214	} ANFD;
		215
		216	typedef struct
		217	{
		218	W w;
		219	int events;
		220	} ANPENDING;
		221
		222	#if EV_MULTIPLICITY
		223
		224	struct ev_loop
		225	{
		226	#define VAR(name,decl) decl;
		227	#include "ev_vars.h"
		228	#undef VAR
		229	};
		230	#include "ev_wrap.h"
		231
		232	struct ev_loop default_loop_struct;
		233	static struct ev_loop *default_loop;
		234
		235	#else
		236
		237	#define VAR(name,decl) static decl;
		238	#include "ev_vars.h"
		239	#undef VAR
		240
		241	static int default_loop;
		242
		243	#endif
		244
		245	/*****************************************************************************/
		246
		247	inline ev_tstamp
56	ev_time (void)	248	ev_time (void)
57	{	249	{
58	#if HAVE_REALTIME	250	#if EV_USE_REALTIME
59	struct timespec ts;	251	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	252	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	253	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	254	#else
63	struct timeval tv;	255	struct timeval tv;
64	gettimeofday (&tv, 0);	256	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	257	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	258	#endif
67	}	259	}
68		260
69	static ev_tstamp	261	inline ev_tstamp
70	get_clock (void)	262	get_clock (void)
71	{	263	{
72	#if HAVE_MONOTONIC	264	#if EV_USE_MONOTONIC
73	if (have_monotonic)	265	if (expect_true (have_monotonic))
74	{	266	{
75	struct timespec ts;	267	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	268	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	269	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	270	}
79	#endif	271	#endif
80		272
81	return ev_time ();	273	return ev_time ();
82	}	274	}
83		275
		276	#if EV_MULTIPLICITY
		277	ev_tstamp
		278	ev_now (EV_P)
		279	{
		280	return ev_rt_now;
		281	}
		282	#endif
		283
		284	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		285
84	#define array_needsize(base,cur,cnt,init) \	286	#define array_needsize(type,base,cur,cnt,init) \
85	if ((cnt) > cur) \	287	if (expect_false ((cnt) > cur)) \
86	{ \	288	{ \
87	int newcnt = cur ? cur << 1 : 16; \	289	int newcnt = cur; \
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	290	do \
		291	{ \
		292	newcnt = array_roundsize (type, newcnt << 1); \
		293	} \
		294	while ((cnt) > newcnt); \
		295	\
89	base = realloc (base, sizeof (base) (newcnt)); \	296	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
90	init (base + cur, newcnt - cur); \	297	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	298	cur = newcnt; \
92	}	299	}
		300
		301	#define array_slim(type,stem) \
		302	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		303	{ \
		304	stem ## max = array_roundsize (stem ## cnt >> 1); \
		305	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		306	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		307	}
		308
		309	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		310	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		311	#define array_free_microshit(stem) \
		312	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		313
		314	#define array_free(stem, idx) \
		315	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
93		316
94	/*****************************************************************************/	317	/*****************************************************************************/
95		318
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	319	static void
109	anfds_init (ANFD *base, int count)	320	anfds_init (ANFD *base, int count)
110	{	321	{
111	while (count--)	322	while (count--)
112	{	323	{
113	base->head = 0;	324	base->head = 0;
114	base->wev = base->rev = EV_NONE;	325	base->events = EV_NONE;
		326	base->reify = 0;
		327
115	++base;	328	++base;
116	}	329	}
117	}	330	}
118		331
119	typedef struct	332	void
		333	ev_feed_event (EV_P_ void *w, int revents)
120	{	334	{
121	W w;	335	W w_ = (W)w;
122	int events;
123	} ANPENDING;
124		336
125	static ANPENDING *pendings;	337	if (w_->pending)
126	static int pendingmax, pendingcnt;	338	{
		339	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		340	return;
		341	}
127		342
128	static void
129	event (W w, int events)
130	{
131	w->pending = ++pendingcnt;	343	w_->pending = ++pendingcnt [ABSPRI (w_)];
132	array_needsize (pendings, pendingmax, pendingcnt, );	344	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
133	pendings [pendingcnt - 1].w = w;	345	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
134	pendings [pendingcnt - 1].events = events;	346	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
135	}	347	}
136		348
137	static void	349	static void
		350	queue_events (EV_P_ W *events, int eventcnt, int type)
		351	{
		352	int i;
		353
		354	for (i = 0; i < eventcnt; ++i)
		355	ev_feed_event (EV_A_ events [i], type);
		356	}
		357
		358	inline void
138	fd_event (int fd, int events)	359	fd_event (EV_P_ int fd, int revents)
139	{	360	{
140	ANFD *anfd = anfds + fd;	361	ANFD *anfd = anfds + fd;
141	struct ev_io *w;	362	struct ev_io *w;
142		363
143	for (w = anfd->head; w; w = w->next)	364	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
144	{	365	{
145	int ev = w->events & events;	366	int ev = w->events & revents;
146		367
147	if (ev)	368	if (ev)
148	event ((W)w, ev);	369	ev_feed_event (EV_A_ (W)w, ev);
149	}	370	}
150	}	371	}
151		372
		373	void
		374	ev_feed_fd_event (EV_P_ int fd, int revents)
		375	{
		376	fd_event (EV_A_ fd, revents);
		377	}
		378
		379	/*****************************************************************************/
		380
152	static void	381	static void
153	queue_events (W *events, int eventcnt, int type)	382	fd_reify (EV_P)
154	{	383	{
155	int i;	384	int i;
156		385
157	for (i = 0; i < eventcnt; ++i)	386	for (i = 0; i < fdchangecnt; ++i)
158	event (events [i], type);	387	{
		388	int fd = fdchanges [i];
		389	ANFD *anfd = anfds + fd;
		390	struct ev_io *w;
		391
		392	int events = 0;
		393
		394	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		395	events \|= w->events;
		396
		397	anfd->reify = 0;
		398
		399	method_modify (EV_A_ fd, anfd->events, events);
		400	anfd->events = events;
		401	}
		402
		403	fdchangecnt = 0;
		404	}
		405
		406	static void
		407	fd_change (EV_P_ int fd)
		408	{
		409	if (anfds [fd].reify)
		410	return;
		411
		412	anfds [fd].reify = 1;
		413
		414	++fdchangecnt;
		415	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		416	fdchanges [fdchangecnt - 1] = fd;
		417	}
		418
		419	static void
		420	fd_kill (EV_P_ int fd)
		421	{
		422	struct ev_io *w;
		423
		424	while ((w = (struct ev_io *)anfds [fd].head))
		425	{
		426	ev_io_stop (EV_A_ w);
		427	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		428	}
		429	}
		430
		431	static int
		432	fd_valid (int fd)
		433	{
		434	#ifdef WIN32
		435	return !!win32_get_osfhandle (fd);
		436	#else
		437	return fcntl (fd, F_GETFD) != -1;
		438	#endif
		439	}
		440
		441	/* called on EBADF to verify fds */
		442	static void
		443	fd_ebadf (EV_P)
		444	{
		445	int fd;
		446
		447	for (fd = 0; fd < anfdmax; ++fd)
		448	if (anfds [fd].events)
		449	if (!fd_valid (fd) == -1 && errno == EBADF)
		450	fd_kill (EV_A_ fd);
		451	}
		452
		453	/* called on ENOMEM in select/poll to kill some fds and retry */
		454	static void
		455	fd_enomem (EV_P)
		456	{
		457	int fd;
		458
		459	for (fd = anfdmax; fd--; )
		460	if (anfds [fd].events)
		461	{
		462	fd_kill (EV_A_ fd);
		463	return;
		464	}
		465	}
		466
		467	/* usually called after fork if method needs to re-arm all fds from scratch */
		468	static void
		469	fd_rearm_all (EV_P)
		470	{
		471	int fd;
		472
		473	/* this should be highly optimised to not do anything but set a flag */
		474	for (fd = 0; fd < anfdmax; ++fd)
		475	if (anfds [fd].events)
		476	{
		477	anfds [fd].events = 0;
		478	fd_change (EV_A_ fd);
		479	}
159	}	480	}
160		481
161	/*****************************************************************************/	482	/*****************************************************************************/
162		483
163	static struct ev_timer **timers;
164	static int timermax, timercnt;
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void	484	static void
170	upheap (WT *timers, int k)	485	upheap (WT *heap, int k)
171	{	486	{
172	WT w = timers [k];	487	WT w = heap [k];
173		488
174	while (k && timers [k >> 1]->at > w->at)	489	while (k && heap [k >> 1]->at > w->at)
175	{	490	{
176	timers [k] = timers [k >> 1];	491	heap [k] = heap [k >> 1];
177	timers [k]->active = k + 1;	492	((W)heap [k])->active = k + 1;
178	k >>= 1;	493	k >>= 1;
179	}	494	}
180		495
181	timers [k] = w;	496	heap [k] = w;
182	timers [k]->active = k + 1;	497	((W)heap [k])->active = k + 1;
183		498
184	}	499	}
185		500
186	static void	501	static void
187	downheap (WT *timers, int N, int k)	502	downheap (WT *heap, int N, int k)
188	{	503	{
189	WT w = timers [k];	504	WT w = heap [k];
190		505
191	while (k < (N >> 1))	506	while (k < (N >> 1))
192	{	507	{
193	int j = k << 1;	508	int j = k << 1;
194		509
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	510	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
196	++j;	511	++j;
197		512
198	if (w->at <= timers [j]->at)	513	if (w->at <= heap [j]->at)
199	break;	514	break;
200		515
201	timers [k] = timers [j];	516	heap [k] = heap [j];
202	timers [k]->active = k + 1;	517	((W)heap [k])->active = k + 1;
203	k = j;	518	k = j;
204	}	519	}
205		520
206	timers [k] = w;	521	heap [k] = w;
207	timers [k]->active = k + 1;	522	((W)heap [k])->active = k + 1;
		523	}
		524
		525	inline void
		526	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		527	{
		528	ev_tstamp old_at = heap [k]->at;
		529	heap [k]->at = at;
		530
		531	if (old_at < at)
		532	downheap (heap, N, k);
		533	else
		534	upheap (heap, k);
208	}	535	}
209		536
210	/*****************************************************************************/	537	/*****************************************************************************/
211		538
212	typedef struct	539	typedef struct
213	{	540	{
214	struct ev_signal *head;	541	WL head;
215	sig_atomic_t gotsig;	542	sig_atomic_t volatile gotsig;
216	} ANSIG;	543	} ANSIG;
217		544
218	static ANSIG *signals;	545	static ANSIG *signals;
219	static int signalmax;	546	static int signalmax;
220		547
221	static int sigpipe [2];	548	static int sigpipe [2];
222	static sig_atomic_t gotsig;	549	static sig_atomic_t volatile gotsig;
223	static struct ev_io sigev;	550	static struct ev_io sigev;
224		551
225	static void	552	static void
226	signals_init (ANSIG *base, int count)	553	signals_init (ANSIG *base, int count)
227	{	554	{
228	while (count--)	555	while (count--)
229	{	556	{
230	base->head = 0;	557	base->head = 0;
231	base->gotsig = 0;	558	base->gotsig = 0;
		559
232	++base;	560	++base;
233	}	561	}
234	}	562	}
235		563
236	static void	564	static void
237	sighandler (int signum)	565	sighandler (int signum)
238	{	566	{
		567	#if WIN32
		568	signal (signum, sighandler);
		569	#endif
		570
239	signals [signum - 1].gotsig = 1;	571	signals [signum - 1].gotsig = 1;
240		572
241	if (!gotsig)	573	if (!gotsig)
242	{	574	{
		575	int old_errno = errno;
243	gotsig = 1;	576	gotsig = 1;
		577	#ifdef WIN32
		578	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		579	#else
244	write (sigpipe [1], &gotsig, 1);	580	write (sigpipe [1], &signum, 1);
		581	#endif
		582	errno = old_errno;
245	}	583	}
246	}	584	}
247		585
		586	void
		587	ev_feed_signal_event (EV_P_ int signum)
		588	{
		589	WL w;
		590
		591	#if EV_MULTIPLICITY
		592	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		593	#endif
		594
		595	--signum;
		596
		597	if (signum < 0 \|\| signum >= signalmax)
		598	return;
		599
		600	signals [signum].gotsig = 0;
		601
		602	for (w = signals [signum].head; w; w = w->next)
		603	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		604	}
		605
248	static void	606	static void
249	sigcb (struct ev_io *iow, int revents)	607	sigcb (EV_P_ struct ev_io *iow, int revents)
250	{	608	{
251	struct ev_signal *w;
252	int sig;	609	int signum;
253		610
		611	#ifdef WIN32
		612	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		613	#else
		614	read (sigpipe [0], &revents, 1);
		615	#endif
254	gotsig = 0;	616	gotsig = 0;
255	read (sigpipe [0], &revents, 1);
256		617
257	for (sig = signalmax; sig--; )	618	for (signum = signalmax; signum--; )
258	if (signals [sig].gotsig)	619	if (signals [signum].gotsig)
259	{	620	ev_feed_signal_event (EV_A_ signum + 1);
260	signals [sig].gotsig = 0;
261
262	for (w = signals [sig].head; w; w = w->next)
263	event ((W)w, EV_SIGNAL);
264	}
265	}	621	}
266		622
267	static void	623	static void
268	siginit (void)	624	siginit (EV_P)
269	{	625	{
		626	#ifndef WIN32
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	627	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	628	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272		629
273	/* rather than sort out wether we really need nb, set it */	630	/* rather than sort out wether we really need nb, set it */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	631	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	632	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		633	#endif
276		634
277	evio_set (&sigev, sigpipe [0], EV_READ);	635	ev_io_set (&sigev, sigpipe [0], EV_READ);
278	evio_start (&sigev);	636	ev_io_start (EV_A_ &sigev);
		637	ev_unref (EV_A); /* child watcher should not keep loop alive */
279	}	638	}
280		639
281	/*****************************************************************************/	640	/*****************************************************************************/
282		641
283	static struct ev_idle **idles;	642	static struct ev_child *childs [PID_HASHSIZE];
284	static int idlemax, idlecnt;
285		643
286	static struct ev_check **checks;	644	#ifndef WIN32
287	static int checkmax, checkcnt;	645
		646	static struct ev_signal childev;
		647
		648	#ifndef WCONTINUED
		649	# define WCONTINUED 0
		650	#endif
		651
		652	static void
		653	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		654	{
		655	struct ev_child *w;
		656
		657	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		658	if (w->pid == pid \|\| !w->pid)
		659	{
		660	ev_priority (w) = ev_priority (sw); /* need to do it now */
		661	w->rpid = pid;
		662	w->rstatus = status;
		663	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		664	}
		665	}
		666
		667	static void
		668	childcb (EV_P_ struct ev_signal *sw, int revents)
		669	{
		670	int pid, status;
		671
		672	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		673	{
		674	/* make sure we are called again until all childs have been reaped */
		675	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		676
		677	child_reap (EV_A_ sw, pid, pid, status);
		678	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		679	}
		680	}
		681
		682	#endif
288		683
289	/*****************************************************************************/	684	/*****************************************************************************/
290		685
		686	#if EV_USE_KQUEUE
		687	# include "ev_kqueue.c"
		688	#endif
291	#if HAVE_EPOLL	689	#if EV_USE_EPOLL
292	# include "ev_epoll.c"	690	# include "ev_epoll.c"
293	#endif	691	#endif
		692	#if EV_USE_POLL
		693	# include "ev_poll.c"
		694	#endif
294	#if HAVE_SELECT	695	#if EV_USE_SELECT
295	# include "ev_select.c"	696	# include "ev_select.c"
296	#endif	697	#endif
297		698
298	int ev_init (int flags)	699	int
		700	ev_version_major (void)
299	{	701	{
		702	return EV_VERSION_MAJOR;
		703	}
		704
		705	int
		706	ev_version_minor (void)
		707	{
		708	return EV_VERSION_MINOR;
		709	}
		710
		711	/* return true if we are running with elevated privileges and should ignore env variables */
		712	static int
		713	enable_secure (void)
		714	{
		715	#ifdef WIN32
		716	return 0;
		717	#else
		718	return getuid () != geteuid ()
		719	\|\| getgid () != getegid ();
		720	#endif
		721	}
		722
		723	int
		724	ev_method (EV_P)
		725	{
		726	return method;
		727	}
		728
		729	static void
		730	loop_init (EV_P_ int methods)
		731	{
		732	if (!method)
		733	{
300	#if HAVE_MONOTONIC	734	#if EV_USE_MONOTONIC
301	{	735	{
302	struct timespec ts;	736	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	737	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;	738	have_monotonic = 1;
305	}	739	}
306	#endif	740	#endif
307		741
308	ev_now = ev_time ();	742	ev_rt_now = ev_time ();
309	now = get_clock ();	743	mn_now = get_clock ();
310	diff = ev_now - now;	744	now_floor = mn_now;
		745	rtmn_diff = ev_rt_now - mn_now;
311		746
312	if (pipe (sigpipe))	747	if (methods == EVMETHOD_AUTO)
313	return 0;	748	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		749	methods = atoi (getenv ("LIBEV_METHODS"));
		750	else
		751	methods = EVMETHOD_ANY;
314		752
315	ev_method = EVMETHOD_NONE;	753	method = 0;
		754	#if EV_USE_WIN32
		755	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		756	#endif
		757	#if EV_USE_KQUEUE
		758	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		759	#endif
316	#if HAVE_EPOLL	760	#if EV_USE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	761	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
318	#endif	762	#endif
		763	#if EV_USE_POLL
		764	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		765	#endif
319	#if HAVE_SELECT	766	#if EV_USE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);	767	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
321	#endif	768	#endif
322		769
323	if (ev_method)
324	{
325	evw_init (&sigev, sigcb);	770	ev_init (&sigev, sigcb);
		771	ev_set_priority (&sigev, EV_MAXPRI);
		772	}
		773	}
		774
		775	void
		776	loop_destroy (EV_P)
		777	{
		778	int i;
		779
		780	#if EV_USE_WIN32
		781	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		782	#endif
		783	#if EV_USE_KQUEUE
		784	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		785	#endif
		786	#if EV_USE_EPOLL
		787	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		788	#endif
		789	#if EV_USE_POLL
		790	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		791	#endif
		792	#if EV_USE_SELECT
		793	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		794	#endif
		795
		796	for (i = NUMPRI; i--; )
		797	array_free (pending, [i]);
		798
		799	/* have to use the microsoft-never-gets-it-right macro */
		800	array_free_microshit (fdchange);
		801	array_free_microshit (timer);
		802	array_free_microshit (periodic);
		803	array_free_microshit (idle);
		804	array_free_microshit (prepare);
		805	array_free_microshit (check);
		806
		807	method = 0;
		808	}
		809
		810	static void
		811	loop_fork (EV_P)
		812	{
		813	#if EV_USE_EPOLL
		814	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		815	#endif
		816	#if EV_USE_KQUEUE
		817	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		818	#endif
		819
		820	if (ev_is_active (&sigev))
		821	{
		822	/* default loop */
		823
		824	ev_ref (EV_A);
		825	ev_io_stop (EV_A_ &sigev);
		826	close (sigpipe [0]);
		827	close (sigpipe [1]);
		828
		829	while (pipe (sigpipe))
		830	syserr ("(libev) error creating pipe");
		831
326	siginit ();	832	siginit (EV_A);
		833	}
		834
		835	postfork = 0;
		836	}
		837
		838	#if EV_MULTIPLICITY
		839	struct ev_loop *
		840	ev_loop_new (int methods)
		841	{
		842	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		843
		844	memset (loop, 0, sizeof (struct ev_loop));
		845
		846	loop_init (EV_A_ methods);
		847
		848	if (ev_method (EV_A))
		849	return loop;
		850
		851	return 0;
		852	}
		853
		854	void
		855	ev_loop_destroy (EV_P)
		856	{
		857	loop_destroy (EV_A);
		858	ev_free (loop);
		859	}
		860
		861	void
		862	ev_loop_fork (EV_P)
		863	{
		864	postfork = 1;
		865	}
		866
		867	#endif
		868
		869	#if EV_MULTIPLICITY
		870	struct ev_loop *
		871	#else
		872	int
		873	#endif
		874	ev_default_loop (int methods)
		875	{
		876	if (sigpipe [0] == sigpipe [1])
		877	if (pipe (sigpipe))
		878	return 0;
		879
		880	if (!default_loop)
327	}	881	{
		882	#if EV_MULTIPLICITY
		883	struct ev_loop *loop = default_loop = &default_loop_struct;
		884	#else
		885	default_loop = 1;
		886	#endif
328		887
329	return ev_method;	888	loop_init (EV_A_ methods);
		889
		890	if (ev_method (EV_A))
		891	{
		892	siginit (EV_A);
		893
		894	#ifndef WIN32
		895	ev_signal_init (&childev, childcb, SIGCHLD);
		896	ev_set_priority (&childev, EV_MAXPRI);
		897	ev_signal_start (EV_A_ &childev);
		898	ev_unref (EV_A); /* child watcher should not keep loop alive */
		899	#endif
		900	}
		901	else
		902	default_loop = 0;
		903	}
		904
		905	return default_loop;
		906	}
		907
		908	void
		909	ev_default_destroy (void)
		910	{
		911	#if EV_MULTIPLICITY
		912	struct ev_loop *loop = default_loop;
		913	#endif
		914
		915	#ifndef WIN32
		916	ev_ref (EV_A); /* child watcher */
		917	ev_signal_stop (EV_A_ &childev);
		918	#endif
		919
		920	ev_ref (EV_A); /* signal watcher */
		921	ev_io_stop (EV_A_ &sigev);
		922
		923	close (sigpipe [0]); sigpipe [0] = 0;
		924	close (sigpipe [1]); sigpipe [1] = 0;
		925
		926	loop_destroy (EV_A);
		927	}
		928
		929	void
		930	ev_default_fork (void)
		931	{
		932	#if EV_MULTIPLICITY
		933	struct ev_loop *loop = default_loop;
		934	#endif
		935
		936	if (method)
		937	postfork = 1;
330	}	938	}
331		939
332	/*****************************************************************************/	940	/*****************************************************************************/
333		941
334	void ev_prefork (void)
335	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif
350
351	evio_stop (&sigev);
352	close (sigpipe [0]);
353	close (sigpipe [1]);
354	pipe (sigpipe);
355	siginit ();
356	}
357
358	/*****************************************************************************/
359
360	static void	942	static int
361	fd_reify (void)	943	any_pending (EV_P)
362	{	944	{
363	int i;	945	int pri;
364		946
365	for (i = 0; i < fdchangecnt; ++i)	947	for (pri = NUMPRI; pri--; )
366	{	948	if (pendingcnt [pri])
367	int fd = fdchanges [i];	949	return 1;
368	ANFD *anfd = anfds + fd;
369	struct ev_io *w;
370		950
371	int wev = 0;	951	return 0;
372
373	for (w = anfd->head; w; w = w->next)
374	wev \|= w->events;
375
376	if (anfd->wev != wev)
377	{
378	method_modify (fd, anfd->wev, wev);
379	anfd->wev = wev;
380	}
381	}
382
383	fdchangecnt = 0;
384	}	952	}
385		953
386	static void	954	static void
387	call_pending ()	955	call_pending (EV_P)
388	{	956	{
389	int i;	957	int pri;
390		958
391	for (i = 0; i < pendingcnt; ++i)	959	for (pri = NUMPRI; pri--; )
		960	while (pendingcnt [pri])
392	{	961	{
393	ANPENDING *p = pendings + i;	962	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
394		963
395	if (p->w)	964	if (p->w)
396	{	965	{
397	p->w->pending = 0;	966	p->w->pending = 0;
398	p->w->cb (p->w, p->events);	967	EV_CB_INVOKE (p->w, p->events);
399	}	968	}
400	}	969	}
401
402	pendingcnt = 0;
403	}	970	}
404		971
405	static void	972	static void
406	timers_reify ()	973	timers_reify (EV_P)
407	{	974	{
408	while (timercnt && timers [0]->at <= now)	975	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	976	{
410	struct ev_timer *w = timers [0];	977	struct ev_timer *w = timers [0];
		978
		979	assert (("inactive timer on timer heap detected", ev_is_active (w)));
411		980
412	/* first reschedule or stop timer */	981	/* first reschedule or stop timer */
413	if (w->repeat)	982	if (w->repeat)
414	{	983	{
		984	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
415	w->at = now + w->repeat;	985	((WT)w)->at = mn_now + w->repeat;
416	assert (("timer timeout in the past, negative repeat?", w->at > now));
417	downheap ((WT *)timers, timercnt, 0);	986	downheap ((WT *)timers, timercnt, 0);
418	}	987	}
419	else	988	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	989	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		990
422	event ((W)w, EV_TIMEOUT);	991	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423	}	992	}
424	}	993	}
425		994
426	static void	995	static void
427	periodics_reify ()	996	periodics_reify (EV_P)
428	{	997	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	998	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
430	{	999	{
431	struct ev_periodic *w = periodics [0];	1000	struct ev_periodic *w = periodics [0];
432		1001
		1002	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1003
433	/* first reschedule or stop timer */	1004	/* first reschedule or stop timer */
434	if (w->interval)	1005	if (w->reschedule_cb)
435	{	1006	{
		1007	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1008
		1009	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1010	downheap ((WT *)periodics, periodiccnt, 0);
		1011	}
		1012	else if (w->interval)
		1013	{
436	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1014	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
437	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1015	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
438	downheap ((WT *)periodics, periodiccnt, 0);	1016	downheap ((WT *)periodics, periodiccnt, 0);
439	}	1017	}
440	else	1018	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	1019	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		1020
443	event ((W)w, EV_TIMEOUT);	1021	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444	}	1022	}
445	}	1023	}
446		1024
447	static void	1025	static void
448	periodics_reschedule (ev_tstamp diff)	1026	periodics_reschedule (EV_P)
449	{	1027	{
450	int i;	1028	int i;
451		1029
452	/* adjust periodics after time jump */	1030	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	1031	for (i = 0; i < periodiccnt; ++i)
454	{	1032	{
455	struct ev_periodic *w = periodics [i];	1033	struct ev_periodic *w = periodics [i];
456		1034
		1035	if (w->reschedule_cb)
		1036	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
457	if (w->interval)	1037	else if (w->interval)
		1038	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1039	}
		1040
		1041	/* now rebuild the heap */
		1042	for (i = periodiccnt >> 1; i--; )
		1043	downheap ((WT *)periodics, periodiccnt, i);
		1044	}
		1045
		1046	inline int
		1047	time_update_monotonic (EV_P)
		1048	{
		1049	mn_now = get_clock ();
		1050
		1051	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1052	{
		1053	ev_rt_now = rtmn_diff + mn_now;
		1054	return 0;
		1055	}
		1056	else
		1057	{
		1058	now_floor = mn_now;
		1059	ev_rt_now = ev_time ();
		1060	return 1;
		1061	}
		1062	}
		1063
		1064	static void
		1065	time_update (EV_P)
		1066	{
		1067	int i;
		1068
		1069	#if EV_USE_MONOTONIC
		1070	if (expect_true (have_monotonic))
		1071	{
		1072	if (time_update_monotonic (EV_A))
458	{	1073	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1074	ev_tstamp odiff = rtmn_diff;
460		1075
461	if (fabs (diff) >= 1e-4)	1076	for (i = 4; --i; ) /* loop a few times, before making important decisions */
462	{	1077	{
463	evperiodic_stop (w);	1078	rtmn_diff = ev_rt_now - mn_now;
464	evperiodic_start (w);
465		1079
466	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1080	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1081	return; /* all is well */
		1082
		1083	ev_rt_now = ev_time ();
		1084	mn_now = get_clock ();
		1085	now_floor = mn_now;
467	}	1086	}
		1087
		1088	periodics_reschedule (EV_A);
		1089	/* no timer adjustment, as the monotonic clock doesn't jump */
		1090	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
468	}	1091	}
469	}	1092	}
470	}	1093	else
471		1094	#endif
472	static void	1095	{
473	time_update ()
474	{
475	int i;
476
477	ev_now = ev_time ();	1096	ev_rt_now = ev_time ();
478		1097
479	if (have_monotonic)	1098	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
480	{
481	ev_tstamp odiff = diff;
482
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */
484	{	1099	{
485	now = get_clock ();
486	diff = ev_now - now;
487
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)
489	return; /* all is well */
490
491	ev_now = ev_time ();
492	}
493
494	periodics_reschedule (diff - odiff);
495	/* no timer adjustment, as the monotonic clock doesn't jump */
496	}
497	else
498	{
499	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
500	{
501	periodics_reschedule (ev_now - now);	1100	periodics_reschedule (EV_A);
502		1101
503	/* adjust timers. this is easy, as the offset is the same for all */	1102	/* adjust timers. this is easy, as the offset is the same for all */
504	for (i = 0; i < timercnt; ++i)	1103	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	1104	((WT)timers [i])->at += ev_rt_now - mn_now;
506	}	1105	}
507		1106
508	now = ev_now;	1107	mn_now = ev_rt_now;
509	}	1108	}
510	}	1109	}
511		1110
512	int ev_loop_done;	1111	void
		1112	ev_ref (EV_P)
		1113	{
		1114	++activecnt;
		1115	}
513		1116
		1117	void
		1118	ev_unref (EV_P)
		1119	{
		1120	--activecnt;
		1121	}
		1122
		1123	static int loop_done;
		1124
		1125	void
514	void ev_loop (int flags)	1126	ev_loop (EV_P_ int flags)
515	{	1127	{
516	double block;	1128	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1129	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
518
519	if (checkcnt)
520	{
521	queue_events ((W *)checks, checkcnt, EV_CHECK);
522	call_pending ();
523	}
524		1130
525	do	1131	do
526	{	1132	{
		1133	/* queue check watchers (and execute them) */
		1134	if (expect_false (preparecnt))
		1135	{
		1136	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1137	call_pending (EV_A);
		1138	}
		1139
		1140	/* we might have forked, so reify kernel state if necessary */
		1141	if (expect_false (postfork))
		1142	loop_fork (EV_A);
		1143
527	/* update fd-related kernel structures */	1144	/* update fd-related kernel structures */
528	fd_reify ();	1145	fd_reify (EV_A);
529		1146
530	/* calculate blocking time */	1147	/* calculate blocking time */
531		1148
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1149	/* we only need this for !monotonic clock or timers, but as we basically
		1150	always have timers, we just calculate it always */
		1151	#if EV_USE_MONOTONIC
		1152	if (expect_true (have_monotonic))
		1153	time_update_monotonic (EV_A);
		1154	else
		1155	#endif
		1156	{
533	ev_now = ev_time ();	1157	ev_rt_now = ev_time ();
		1158	mn_now = ev_rt_now;
		1159	}
534		1160
535	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1161	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
536	block = 0.;	1162	block = 0.;
537	else	1163	else
538	{	1164	{
539	block = MAX_BLOCKTIME;	1165	block = MAX_BLOCKTIME;
540		1166
541	if (timercnt)	1167	if (timercnt)
542	{	1168	{
543	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1169	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
544	if (block > to) block = to;	1170	if (block > to) block = to;
545	}	1171	}
546		1172
547	if (periodiccnt)	1173	if (periodiccnt)
548	{	1174	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1175	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
550	if (block > to) block = to;	1176	if (block > to) block = to;
551	}	1177	}
552		1178
553	if (block < 0.) block = 0.;	1179	if (block < 0.) block = 0.;
554	}	1180	}
555		1181
556	method_poll (block);	1182	method_poll (EV_A_ block);
557		1183
558	/* update ev_now, do magic */	1184	/* update ev_rt_now, do magic */
559	time_update ();	1185	time_update (EV_A);
560		1186
561	/* queue pending timers and reschedule them */	1187	/* queue pending timers and reschedule them */
		1188	timers_reify (EV_A); /* relative timers called last */
562	periodics_reify (); /* absolute timers first */	1189	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */
564		1190
565	/* queue idle watchers unless io or timers are pending */	1191	/* queue idle watchers unless io or timers are pending */
566	if (!pendingcnt)	1192	if (idlecnt && !any_pending (EV_A))
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1193	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
568		1194
569	/* queue check and possibly idle watchers */	1195	/* queue check watchers, to be executed first */
		1196	if (checkcnt)
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1197	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1198
572	call_pending ();	1199	call_pending (EV_A);
573	}	1200	}
574	while (!ev_loop_done);	1201	while (activecnt && !loop_done);
575		1202
576	if (ev_loop_done != 2)	1203	if (loop_done != 2)
577	ev_loop_done = 0;	1204	loop_done = 0;
		1205	}
		1206
		1207	void
		1208	ev_unloop (EV_P_ int how)
		1209	{
		1210	loop_done = how;
578	}	1211	}
579		1212
580	/*****************************************************************************/	1213	/*****************************************************************************/
581		1214
582	static void	1215	inline void
583	wlist_add (WL *head, WL elem)	1216	wlist_add (WL *head, WL elem)
584	{	1217	{
585	elem->next = *head;	1218	elem->next = *head;
586	*head = elem;	1219	*head = elem;
587	}	1220	}
588		1221
589	static void	1222	inline void
590	wlist_del (WL *head, WL elem)	1223	wlist_del (WL *head, WL elem)
591	{	1224	{
592	while (*head)	1225	while (*head)
593	{	1226	{
594	if (*head == elem)	1227	if (*head == elem)
599		1232
600	head = &(*head)->next;	1233	head = &(*head)->next;
601	}	1234	}
602	}	1235	}
603		1236
604	static void	1237	inline void
		1238	ev_clear_pending (EV_P_ W w)
		1239	{
		1240	if (w->pending)
		1241	{
		1242	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1243	w->pending = 0;
		1244	}
		1245	}
		1246
		1247	inline void
605	ev_start (W w, int active)	1248	ev_start (EV_P_ W w, int active)
606	{	1249	{
607	w->pending = 0;	1250	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1251	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1252
608	w->active = active;	1253	w->active = active;
		1254	ev_ref (EV_A);
609	}	1255	}
610		1256
611	static void	1257	inline void
612	ev_stop (W w)	1258	ev_stop (EV_P_ W w)
613	{	1259	{
614	if (w->pending)	1260	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1261	w->active = 0;
618	}	1262	}
619		1263
620	/*****************************************************************************/	1264	/*****************************************************************************/
621		1265
622	void	1266	void
623	evio_start (struct ev_io *w)	1267	ev_io_start (EV_P_ struct ev_io *w)
624	{	1268	{
		1269	int fd = w->fd;
		1270
625	if (ev_is_active (w))	1271	if (ev_is_active (w))
626	return;	1272	return;
627		1273
628	int fd = w->fd;	1274	assert (("ev_io_start called with negative fd", fd >= 0));
629		1275
630	ev_start ((W)w, 1);	1276	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1277	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1278	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633		1279
634	++fdchangecnt;	1280	fd_change (EV_A_ fd);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1281	}
638		1282
639	void	1283	void
640	evio_stop (struct ev_io *w)	1284	ev_io_stop (EV_P_ struct ev_io *w)
641	{	1285	{
		1286	ev_clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1287	if (!ev_is_active (w))
643	return;	1288	return;
644		1289
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1290	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1291	ev_stop (EV_A_ (W)w);
647		1292
648	++fdchangecnt;	1293	fd_change (EV_A_ w->fd);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1294	}
652		1295
653
654	void	1296	void
655	evtimer_start (struct ev_timer *w)	1297	ev_timer_start (EV_P_ struct ev_timer *w)
656	{	1298	{
657	if (ev_is_active (w))	1299	if (ev_is_active (w))
658	return;	1300	return;
659		1301
660	w->at += now;	1302	((WT)w)->at += mn_now;
661		1303
662	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1304	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
663		1305
664	ev_start ((W)w, ++timercnt);	1306	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1307	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
666	timers [timercnt - 1] = w;	1308	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);	1309	upheap ((WT *)timers, timercnt - 1);
668	}
669		1310
		1311	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1312	}
		1313
670	void	1314	void
671	evtimer_stop (struct ev_timer *w)	1315	ev_timer_stop (EV_P_ struct ev_timer *w)
672	{	1316	{
		1317	ev_clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1318	if (!ev_is_active (w))
674	return;	1319	return;
675		1320
		1321	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1322
676	if (w->active < timercnt--)	1323	if (((W)w)->active < timercnt--)
677	{	1324	{
678	timers [w->active - 1] = timers [timercnt];	1325	timers [((W)w)->active - 1] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);	1326	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
680	}	1327	}
681		1328
682	w->at = w->repeat;	1329	((WT)w)->at = w->repeat;
683		1330
684	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
685	}	1332	}
686		1333
687	void	1334	void
688	evtimer_again (struct ev_timer *w)	1335	ev_timer_again (EV_P_ struct ev_timer *w)
689	{	1336	{
690	if (ev_is_active (w))	1337	if (ev_is_active (w))
691	{	1338	{
692	if (w->repeat)	1339	if (w->repeat)
693	{
694	w->at = now + w->repeat;
695	downheap ((WT *)timers, timercnt, w->active - 1);	1340	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
696	}
697	else	1341	else
698	evtimer_stop (w);	1342	ev_timer_stop (EV_A_ w);
699	}	1343	}
700	else if (w->repeat)	1344	else if (w->repeat)
701	evtimer_start (w);	1345	ev_timer_start (EV_A_ w);
702	}	1346	}
703		1347
704	void	1348	void
705	evperiodic_start (struct ev_periodic *w)	1349	ev_periodic_start (EV_P_ struct ev_periodic *w)
706	{	1350	{
707	if (ev_is_active (w))	1351	if (ev_is_active (w))
708	return;	1352	return;
709		1353
710	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1354	if (w->reschedule_cb)
711		1355	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1356	else if (w->interval)
		1357	{
		1358	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
712	/* this formula differs from the one in periodic_reify because we do not always round up */	1359	/* this formula differs from the one in periodic_reify because we do not always round up */
713	if (w->interval)
714	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1360	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1361	}
715		1362
716	ev_start ((W)w, ++periodiccnt);	1363	ev_start (EV_A_ (W)w, ++periodiccnt);
717	array_needsize (periodics, periodicmax, periodiccnt, );	1364	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
718	periodics [periodiccnt - 1] = w;	1365	periodics [periodiccnt - 1] = w;
719	upheap ((WT *)periodics, periodiccnt - 1);	1366	upheap ((WT *)periodics, periodiccnt - 1);
720	}
721		1367
		1368	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1369	}
		1370
722	void	1371	void
723	evperiodic_stop (struct ev_periodic *w)	1372	ev_periodic_stop (EV_P_ struct ev_periodic *w)
724	{	1373	{
		1374	ev_clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1375	if (!ev_is_active (w))
726	return;	1376	return;
727		1377
		1378	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1379
728	if (w->active < periodiccnt--)	1380	if (((W)w)->active < periodiccnt--)
729	{	1381	{
730	periodics [w->active - 1] = periodics [periodiccnt];	1382	periodics [((W)w)->active - 1] = periodics [periodiccnt];
731	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1383	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
732	}	1384	}
733		1385
734	ev_stop ((W)w);	1386	ev_stop (EV_A_ (W)w);
735	}	1387	}
736		1388
737	void	1389	void
738	evsignal_start (struct ev_signal *w)	1390	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1391	{
		1392	/* TODO: use adjustheap and recalculation */
		1393	ev_periodic_stop (EV_A_ w);
		1394	ev_periodic_start (EV_A_ w);
		1395	}
		1396
		1397	void
		1398	ev_idle_start (EV_P_ struct ev_idle *w)
739	{	1399	{
740	if (ev_is_active (w))	1400	if (ev_is_active (w))
741	return;	1401	return;
742		1402
		1403	ev_start (EV_A_ (W)w, ++idlecnt);
		1404	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1405	idles [idlecnt - 1] = w;
		1406	}
		1407
		1408	void
		1409	ev_idle_stop (EV_P_ struct ev_idle *w)
		1410	{
		1411	ev_clear_pending (EV_A_ (W)w);
		1412	if (ev_is_active (w))
		1413	return;
		1414
		1415	idles [((W)w)->active - 1] = idles [--idlecnt];
		1416	ev_stop (EV_A_ (W)w);
		1417	}
		1418
		1419	void
		1420	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1421	{
		1422	if (ev_is_active (w))
		1423	return;
		1424
		1425	ev_start (EV_A_ (W)w, ++preparecnt);
		1426	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1427	prepares [preparecnt - 1] = w;
		1428	}
		1429
		1430	void
		1431	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1432	{
		1433	ev_clear_pending (EV_A_ (W)w);
		1434	if (ev_is_active (w))
		1435	return;
		1436
		1437	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1438	ev_stop (EV_A_ (W)w);
		1439	}
		1440
		1441	void
		1442	ev_check_start (EV_P_ struct ev_check *w)
		1443	{
		1444	if (ev_is_active (w))
		1445	return;
		1446
		1447	ev_start (EV_A_ (W)w, ++checkcnt);
		1448	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1449	checks [checkcnt - 1] = w;
		1450	}
		1451
		1452	void
		1453	ev_check_stop (EV_P_ struct ev_check *w)
		1454	{
		1455	ev_clear_pending (EV_A_ (W)w);
		1456	if (ev_is_active (w))
		1457	return;
		1458
		1459	checks [((W)w)->active - 1] = checks [--checkcnt];
		1460	ev_stop (EV_A_ (W)w);
		1461	}
		1462
		1463	#ifndef SA_RESTART
		1464	# define SA_RESTART 0
		1465	#endif
		1466
		1467	void
		1468	ev_signal_start (EV_P_ struct ev_signal *w)
		1469	{
		1470	#if EV_MULTIPLICITY
		1471	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1472	#endif
		1473	if (ev_is_active (w))
		1474	return;
		1475
		1476	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1477
743	ev_start ((W)w, 1);	1478	ev_start (EV_A_ (W)w, 1);
744	array_needsize (signals, signalmax, w->signum, signals_init);	1479	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
745	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1480	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
746		1481
747	if (!w->next)	1482	if (!((WL)w)->next)
748	{	1483	{
		1484	#if WIN32
		1485	signal (w->signum, sighandler);
		1486	#else
749	struct sigaction sa;	1487	struct sigaction sa;
750	sa.sa_handler = sighandler;	1488	sa.sa_handler = sighandler;
751	sigfillset (&sa.sa_mask);	1489	sigfillset (&sa.sa_mask);
752	sa.sa_flags = 0;	1490	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
753	sigaction (w->signum, &sa, 0);	1491	sigaction (w->signum, &sa, 0);
		1492	#endif
754	}	1493	}
755	}	1494	}
756		1495
757	void	1496	void
758	evsignal_stop (struct ev_signal *w)	1497	ev_signal_stop (EV_P_ struct ev_signal *w)
759	{	1498	{
		1499	ev_clear_pending (EV_A_ (W)w);
760	if (!ev_is_active (w))	1500	if (!ev_is_active (w))
761	return;	1501	return;
762		1502
763	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1503	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
764	ev_stop ((W)w);	1504	ev_stop (EV_A_ (W)w);
765		1505
766	if (!signals [w->signum - 1].head)	1506	if (!signals [w->signum - 1].head)
767	signal (w->signum, SIG_DFL);	1507	signal (w->signum, SIG_DFL);
768	}	1508	}
769		1509
770	void evidle_start (struct ev_idle *w)	1510	void
		1511	ev_child_start (EV_P_ struct ev_child *w)
771	{	1512	{
		1513	#if EV_MULTIPLICITY
		1514	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1515	#endif
772	if (ev_is_active (w))	1516	if (ev_is_active (w))
773	return;	1517	return;
774		1518
775	ev_start ((W)w, ++idlecnt);	1519	ev_start (EV_A_ (W)w, 1);
776	array_needsize (idles, idlemax, idlecnt, );	1520	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
777	idles [idlecnt - 1] = w;
778	}	1521	}
779		1522
780	void evidle_stop (struct ev_idle *w)	1523	void
		1524	ev_child_stop (EV_P_ struct ev_child *w)
781	{	1525	{
782	idles [w->active - 1] = idles [--idlecnt];	1526	ev_clear_pending (EV_A_ (W)w);
783	ev_stop ((W)w);
784	}
785
786	void evcheck_start (struct ev_check *w)
787	{
788	if (ev_is_active (w))	1527	if (ev_is_active (w))
789	return;	1528	return;
790		1529
791	ev_start ((W)w, ++checkcnt);	1530	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
792	array_needsize (checks, checkmax, checkcnt, );
793	checks [checkcnt - 1] = w;
794	}
795
796	void evcheck_stop (struct ev_check *w)
797	{
798	checks [w->active - 1] = checks [--checkcnt];
799	ev_stop ((W)w);	1531	ev_stop (EV_A_ (W)w);
800	}	1532	}
801		1533
802	/*****************************************************************************/	1534	/*****************************************************************************/
803		1535
804	#if 0	1536	struct ev_once
805		1537	{
806	struct ev_io wio;	1538	struct ev_io io;
807
808	static void
809	sin_cb (struct ev_io *w, int revents)
810	{
811	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
812	}
813
814	static void
815	ocb (struct ev_timer *w, int revents)
816	{
817	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
818	evtimer_stop (w);
819	evtimer_start (w);
820	}
821
822	static void
823	scb (struct ev_signal *w, int revents)
824	{
825	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
826	evio_stop (&wio);
827	evio_start (&wio);
828	}
829
830	static void
831	gcb (struct ev_signal *w, int revents)
832	{
833	fprintf (stderr, "generic %x\n", revents);
834
835	}
836
837	int main (void)
838	{
839	ev_init (0);
840
841	evio_init (&wio, sin_cb, 0, EV_READ);
842	evio_start (&wio);
843
844	struct ev_timer t[10000];
845
846	#if 0
847	int i;
848	for (i = 0; i < 10000; ++i)
849	{
850	struct ev_timer *w = t + i;
851	evw_init (w, ocb, i);
852	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
853	evtimer_start (w);
854	if (drand48 () < 0.5)
855	evtimer_stop (w);
856	}
857	#endif
858
859	struct ev_timer t1;	1539	struct ev_timer to;
860	evtimer_init (&t1, ocb, 5, 10);	1540	void (cb)(int revents, void arg);
861	evtimer_start (&t1);	1541	void *arg;
		1542	};
862		1543
863	struct ev_signal sig;	1544	static void
864	evsignal_init (&sig, scb, SIGQUIT);	1545	once_cb (EV_P_ struct ev_once *once, int revents)
865	evsignal_start (&sig);	1546	{
		1547	void (cb)(int revents, void arg) = once->cb;
		1548	void *arg = once->arg;
866		1549
867	struct ev_check cw;	1550	ev_io_stop (EV_A_ &once->io);
868	evcheck_init (&cw, gcb);	1551	ev_timer_stop (EV_A_ &once->to);
869	evcheck_start (&cw);	1552	ev_free (once);
870		1553
871	struct ev_idle iw;	1554	cb (revents, arg);
872	evidle_init (&iw, gcb);
873	evidle_start (&iw);
874
875	ev_loop (0);
876
877	return 0;
878	}	1555	}
879		1556
880	#endif	1557	static void
		1558	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1559	{
		1560	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1561	}
881		1562
		1563	static void
		1564	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1565	{
		1566	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1567	}
882		1568
		1569	void
		1570	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1571	{
		1572	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
883		1573
		1574	if (!once)
		1575	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1576	else
		1577	{
		1578	once->cb = cb;
		1579	once->arg = arg;
884		1580
		1581	ev_init (&once->io, once_cb_io);
		1582	if (fd >= 0)
		1583	{
		1584	ev_io_set (&once->io, fd, events);
		1585	ev_io_start (EV_A_ &once->io);
		1586	}
		1587
		1588	ev_init (&once->to, once_cb_to);
		1589	if (timeout >= 0.)
		1590	{
		1591	ev_timer_set (&once->to, timeout, 0.);
		1592	ev_timer_start (EV_A_ &once->to);
		1593	}
		1594	}
		1595	}
		1596

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs. Revision 1.85 by root, Sat Nov 10 03:13:50 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.85 by root, Sat Nov 10 03:13:50 2007 UTC