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

Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 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
38		136
39	struct ev_watcher {	137	#if __GNUC__ >= 3
40	EV_WATCHER (ev_watcher);	138	# define expect(expr,value) __builtin_expect ((expr),(value))
41	};	139	# define inline inline
		140	#else
		141	# define expect(expr,value) (expr)
		142	# define inline static
		143	#endif
42		144
43	struct ev_watcher_list {	145	#define expect_false(expr) expect ((expr) != 0, 0)
44	EV_WATCHER_LIST (ev_watcher_list);	146	#define expect_true(expr) expect ((expr) != 0, 1)
45	};
46		147
47	struct ev_watcher_time {	148	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48	EV_WATCHER_TIME (ev_watcher_time);	149	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49	};
50		150
51	typedef struct ev_watcher *W;	151	typedef struct ev_watcher *W;
52	typedef struct ev_watcher_list *WL;	152	typedef struct ev_watcher_list *WL;
53	typedef struct ev_watcher_time *WT;	153	typedef struct ev_watcher_time *WT;
54		154
55	static ev_tstamp now, diff; /* monotonic clock */	155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
56	ev_tstamp ev_now;
57	int ev_method;
58		156
59	static int have_monotonic; /* runtime */	157	#include "ev_win32.c"
60
61	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
62	static void (*method_modify)(int fd, int oev, int nev);
63	static void (*method_poll)(ev_tstamp timeout);
64		158
65	/*****************************************************************************/	159	/*****************************************************************************/
66		160
67	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
68	ev_time (void)	248	ev_time (void)
69	{	249	{
70	#if HAVE_REALTIME	250	#if EV_USE_REALTIME
71	struct timespec ts;	251	struct timespec ts;
72	clock_gettime (CLOCK_REALTIME, &ts);	252	clock_gettime (CLOCK_REALTIME, &ts);
73	return ts.tv_sec + ts.tv_nsec * 1e-9;	253	return ts.tv_sec + ts.tv_nsec * 1e-9;
74	#else	254	#else
75	struct timeval tv;	255	struct timeval tv;
76	gettimeofday (&tv, 0);	256	gettimeofday (&tv, 0);
77	return tv.tv_sec + tv.tv_usec * 1e-6;	257	return tv.tv_sec + tv.tv_usec * 1e-6;
78	#endif	258	#endif
79	}	259	}
80		260
81	static ev_tstamp	261	inline ev_tstamp
82	get_clock (void)	262	get_clock (void)
83	{	263	{
84	#if HAVE_MONOTONIC	264	#if EV_USE_MONOTONIC
85	if (have_monotonic)	265	if (expect_true (have_monotonic))
86	{	266	{
87	struct timespec ts;	267	struct timespec ts;
88	clock_gettime (CLOCK_MONOTONIC, &ts);	268	clock_gettime (CLOCK_MONOTONIC, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	269	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	}	270	}
91	#endif	271	#endif
92		272
93	return ev_time ();	273	return ev_time ();
94	}	274	}
95		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
96	#define array_needsize(base,cur,cnt,init) \	286	#define array_needsize(type,base,cur,cnt,init) \
97	if ((cnt) > cur) \	287	if (expect_false ((cnt) > cur)) \
98	{ \	288	{ \
99	int newcnt = cur ? cur << 1 : 16; \	289	int newcnt = cur; \
100	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	\
101	base = realloc (base, sizeof (base) (newcnt)); \	296	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
102	init (base + cur, newcnt - cur); \	297	init (base + cur, newcnt - cur); \
103	cur = newcnt; \	298	cur = newcnt; \
104	}	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;
105		316
106	/*****************************************************************************/	317	/*****************************************************************************/
107		318
108	typedef struct
109	{
110	struct ev_io *head;
111	unsigned char wev, rev; /* want, received event set */
112	} ANFD;
113
114	static ANFD *anfds;
115	static int anfdmax;
116
117	static int *fdchanges;
118	static int fdchangemax, fdchangecnt;
119
120	static void	319	static void
121	anfds_init (ANFD *base, int count)	320	anfds_init (ANFD *base, int count)
122	{	321	{
123	while (count--)	322	while (count--)
124	{	323	{
125	base->head = 0;	324	base->head = 0;
126	base->wev = base->rev = EV_NONE;	325	base->events = EV_NONE;
		326	base->reify = 0;
		327
127	++base;	328	++base;
128	}	329	}
129	}	330	}
130		331
131	typedef struct	332	void
		333	ev_feed_event (EV_P_ void *w, int revents)
132	{	334	{
133	W w;	335	W w_ = (W)w;
134	int events;
135	} ANPENDING;
136		336
137	static ANPENDING *pendings;	337	if (w_->pending)
138	static int pendingmax, pendingcnt;	338	{
		339	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		340	return;
		341	}
139		342
140	static void
141	event (W w, int events)
142	{
143	w->pending = ++pendingcnt;	343	w_->pending = ++pendingcnt [ABSPRI (w_)];
144	array_needsize (pendings, pendingmax, pendingcnt, );	344	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
145	pendings [pendingcnt - 1].w = w;	345	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
146	pendings [pendingcnt - 1].events = events;	346	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
147	}	347	}
148		348
149	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
150	fd_event (int fd, int events)	359	fd_event (EV_P_ int fd, int revents)
151	{	360	{
152	ANFD *anfd = anfds + fd;	361	ANFD *anfd = anfds + fd;
153	struct ev_io *w;	362	struct ev_io *w;
154		363
155	for (w = anfd->head; w; w = w->next)	364	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
156	{	365	{
157	int ev = w->events & events;	366	int ev = w->events & revents;
158		367
159	if (ev)	368	if (ev)
160	event ((W)w, ev);	369	ev_feed_event (EV_A_ (W)w, ev);
161	}	370	}
162	}	371	}
163		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
164	static void	381	static void
165	queue_events (W *events, int eventcnt, int type)	382	fd_reify (EV_P)
166	{	383	{
167	int i;	384	int i;
168		385
169	for (i = 0; i < eventcnt; ++i)	386	for (i = 0; i < fdchangecnt; ++i)
170	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	}
171	}	480	}
172		481
173	/*****************************************************************************/	482	/*****************************************************************************/
174		483
175	static struct ev_timer **timers;
176	static int timermax, timercnt;
177
178	static struct ev_periodic **periodics;
179	static int periodicmax, periodiccnt;
180
181	static void	484	static void
182	upheap (WT *timers, int k)	485	upheap (WT *heap, int k)
183	{	486	{
184	WT w = timers [k];	487	WT w = heap [k];
185		488
186	while (k && timers [k >> 1]->at > w->at)	489	while (k && heap [k >> 1]->at > w->at)
187	{	490	{
188	timers [k] = timers [k >> 1];	491	heap [k] = heap [k >> 1];
189	timers [k]->active = k + 1;	492	((W)heap [k])->active = k + 1;
190	k >>= 1;	493	k >>= 1;
191	}	494	}
192		495
193	timers [k] = w;	496	heap [k] = w;
194	timers [k]->active = k + 1;	497	((W)heap [k])->active = k + 1;
195		498
196	}	499	}
197		500
198	static void	501	static void
199	downheap (WT *timers, int N, int k)	502	downheap (WT *heap, int N, int k)
200	{	503	{
201	WT w = timers [k];	504	WT w = heap [k];
202		505
203	while (k < (N >> 1))	506	while (k < (N >> 1))
204	{	507	{
205	int j = k << 1;	508	int j = k << 1;
206		509
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	510	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208	++j;	511	++j;
209		512
210	if (w->at <= timers [j]->at)	513	if (w->at <= heap [j]->at)
211	break;	514	break;
212		515
213	timers [k] = timers [j];	516	heap [k] = heap [j];
214	timers [k]->active = k + 1;	517	((W)heap [k])->active = k + 1;
215	k = j;	518	k = j;
216	}	519	}
217		520
218	timers [k] = w;	521	heap [k] = w;
219	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);
220	}	535	}
221		536
222	/*****************************************************************************/	537	/*****************************************************************************/
223		538
224	typedef struct	539	typedef struct
225	{	540	{
226	struct ev_signal *head;	541	WL head;
227	sig_atomic_t gotsig;	542	sig_atomic_t volatile gotsig;
228	} ANSIG;	543	} ANSIG;
229		544
230	static ANSIG *signals;	545	static ANSIG *signals;
231	static int signalmax;	546	static int signalmax;
232		547
233	static int sigpipe [2];	548	static int sigpipe [2];
234	static sig_atomic_t gotsig;	549	static sig_atomic_t volatile gotsig;
235	static struct ev_io sigev;	550	static struct ev_io sigev;
236		551
237	static void	552	static void
238	signals_init (ANSIG *base, int count)	553	signals_init (ANSIG *base, int count)
239	{	554	{
240	while (count--)	555	while (count--)
241	{	556	{
242	base->head = 0;	557	base->head = 0;
243	base->gotsig = 0;	558	base->gotsig = 0;
		559
244	++base;	560	++base;
245	}	561	}
246	}	562	}
247		563
248	static void	564	static void
249	sighandler (int signum)	565	sighandler (int signum)
250	{	566	{
		567	#if WIN32
		568	signal (signum, sighandler);
		569	#endif
		570
251	signals [signum - 1].gotsig = 1;	571	signals [signum - 1].gotsig = 1;
252		572
253	if (!gotsig)	573	if (!gotsig)
254	{	574	{
		575	int old_errno = errno;
255	gotsig = 1;	576	gotsig = 1;
		577	#ifdef WIN32
		578	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		579	#else
256	write (sigpipe [1], &gotsig, 1);	580	write (sigpipe [1], &signum, 1);
		581	#endif
		582	errno = old_errno;
257	}	583	}
258	}	584	}
259		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
260	static void	606	static void
261	sigcb (struct ev_io *iow, int revents)	607	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	608	{
263	struct ev_signal *w;
264	int sig;	609	int signum;
265		610
		611	#ifdef WIN32
		612	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		613	#else
		614	read (sigpipe [0], &revents, 1);
		615	#endif
266	gotsig = 0;	616	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		617
269	for (sig = signalmax; sig--; )	618	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	619	if (signals [signum].gotsig)
271	{	620	ev_feed_signal_event (EV_A_ signum + 1);
272	signals [sig].gotsig = 0;
273
274	for (w = signals [sig].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);
276	}
277	}	621	}
278		622
279	static void	623	static void
280	siginit (void)	624	siginit (EV_P)
281	{	625	{
		626	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	627	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	628	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		629
285	/* rather than sort out wether we really need nb, set it */	630	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	631	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	632	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		633	#endif
288		634
289	evio_set (&sigev, sigpipe [0], EV_READ);	635	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	636	ev_io_start (EV_A_ &sigev);
		637	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	638	}
292		639
293	/*****************************************************************************/	640	/*****************************************************************************/
294		641
295	static struct ev_idle **idles;	642	static struct ev_child *childs [PID_HASHSIZE];
296	static int idlemax, idlecnt;
297		643
298	static struct ev_check **checks;	644	#ifndef WIN32
299	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
300		683
301	/*****************************************************************************/	684	/*****************************************************************************/
302		685
		686	#if EV_USE_KQUEUE
		687	# include "ev_kqueue.c"
		688	#endif
303	#if HAVE_EPOLL	689	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	690	# include "ev_epoll.c"
305	#endif	691	#endif
		692	#if EV_USE_POLL
		693	# include "ev_poll.c"
		694	#endif
306	#if HAVE_SELECT	695	#if EV_USE_SELECT
307	# include "ev_select.c"	696	# include "ev_select.c"
308	#endif	697	#endif
309		698
310	int ev_init (int flags)	699	int
		700	ev_version_major (void)
311	{	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	{
312	#if HAVE_MONOTONIC	734	#if EV_USE_MONOTONIC
313	{	735	{
314	struct timespec ts;	736	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	737	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	738	have_monotonic = 1;
317	}	739	}
318	#endif	740	#endif
319		741
320	ev_now = ev_time ();	742	ev_rt_now = ev_time ();
321	now = get_clock ();	743	mn_now = get_clock ();
322	diff = ev_now - now;	744	now_floor = mn_now;
		745	rtmn_diff = ev_rt_now - mn_now;
323		746
324	if (pipe (sigpipe))	747	if (methods == EVMETHOD_AUTO)
325	return 0;	748	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		749	methods = atoi (getenv ("LIBEV_METHODS"));
		750	else
		751	methods = EVMETHOD_ANY;
326		752
327	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
328	#if HAVE_EPOLL	760	#if EV_USE_EPOLL
329	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	761	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
330	#endif	762	#endif
		763	#if EV_USE_POLL
		764	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		765	#endif
331	#if HAVE_SELECT	766	#if EV_USE_SELECT
332	if (ev_method == EVMETHOD_NONE) select_init (flags);	767	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
333	#endif	768	#endif
334		769
335	if (ev_method)
336	{
337	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
338	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)
339	}	881	{
		882	#if EV_MULTIPLICITY
		883	struct ev_loop *loop = default_loop = &default_loop_struct;
		884	#else
		885	default_loop = 1;
		886	#endif
340		887
341	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;
342	}	938	}
343		939
344	/*****************************************************************************/	940	/*****************************************************************************/
345		941
346	void ev_prefork (void)
347	{
348	/* nop */
349	}
350
351	void ev_postfork_parent (void)
352	{
353	/* nop */
354	}
355
356	void ev_postfork_child (void)
357	{
358	#if HAVE_EPOLL
359	if (ev_method == EVMETHOD_EPOLL)
360	epoll_postfork_child ();
361	#endif
362
363	evio_stop (&sigev);
364	close (sigpipe [0]);
365	close (sigpipe [1]);
366	pipe (sigpipe);
367	siginit ();
368	}
369
370	/*****************************************************************************/
371
372	static void	942	static int
373	fd_reify (void)	943	any_pending (EV_P)
374	{	944	{
375	int i;	945	int pri;
376		946
377	for (i = 0; i < fdchangecnt; ++i)	947	for (pri = NUMPRI; pri--; )
378	{	948	if (pendingcnt [pri])
379	int fd = fdchanges [i];	949	return 1;
380	ANFD *anfd = anfds + fd;
381	struct ev_io *w;
382		950
383	int wev = 0;	951	return 0;
384
385	for (w = anfd->head; w; w = w->next)
386	wev \|= w->events;
387
388	if (anfd->wev != wev)
389	{
390	method_modify (fd, anfd->wev, wev);
391	anfd->wev = wev;
392	}
393	}
394
395	fdchangecnt = 0;
396	}	952	}
397		953
398	static void	954	static void
399	call_pending ()	955	call_pending (EV_P)
400	{	956	{
401	int i;	957	int pri;
402		958
403	for (i = 0; i < pendingcnt; ++i)	959	for (pri = NUMPRI; pri--; )
		960	while (pendingcnt [pri])
404	{	961	{
405	ANPENDING *p = pendings + i;	962	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
406		963
407	if (p->w)	964	if (p->w)
408	{	965	{
409	p->w->pending = 0;	966	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	967	EV_CB_INVOKE (p->w, p->events);
411	}	968	}
412	}	969	}
413
414	pendingcnt = 0;
415	}	970	}
416		971
417	static void	972	static void
418	timers_reify ()	973	timers_reify (EV_P)
419	{	974	{
420	while (timercnt && timers [0]->at <= now)	975	while (timercnt && ((WT)timers [0])->at <= mn_now)
421	{	976	{
422	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)));
423		980
424	/* first reschedule or stop timer */	981	/* first reschedule or stop timer */
425	if (w->repeat)	982	if (w->repeat)
426	{	983	{
		984	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	985	((WT)w)->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	986	downheap ((WT *)timers, timercnt, 0);
430	}	987	}
431	else	988	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	989	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		990
434	event ((W)w, EV_TIMEOUT);	991	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
435	}	992	}
436	}	993	}
437		994
438	static void	995	static void
439	periodics_reify ()	996	periodics_reify (EV_P)
440	{	997	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	998	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
442	{	999	{
443	struct ev_periodic *w = periodics [0];	1000	struct ev_periodic *w = periodics [0];
444		1001
		1002	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1003
445	/* first reschedule or stop timer */	1004	/* first reschedule or stop timer */
446	if (w->interval)	1005	if (w->reschedule_cb)
447	{	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	{
448	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;
449	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));
450	downheap ((WT *)periodics, periodiccnt, 0);	1016	downheap ((WT *)periodics, periodiccnt, 0);
451	}	1017	}
452	else	1018	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	1019	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		1020
455	event ((W)w, EV_TIMEOUT);	1021	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
456	}	1022	}
457	}	1023	}
458		1024
459	static void	1025	static void
460	time_jump (ev_tstamp diff)	1026	periodics_reschedule (EV_P)
461	{	1027	{
462	int i;	1028	int i;
463		1029
464	/* adjust periodics */	1030	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	1031	for (i = 0; i < periodiccnt; ++i)
466	{	1032	{
467	struct ev_periodic *w = periodics [i];	1033	struct ev_periodic *w = periodics [i];
468		1034
		1035	if (w->reschedule_cb)
		1036	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
469	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))
470	{	1073	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1074	ev_tstamp odiff = rtmn_diff;
472		1075
473	if (fabs (diff) >= 1e-4)	1076	for (i = 4; --i; ) /* loop a few times, before making important decisions */
474	{	1077	{
475	evperiodic_stop (w);	1078	rtmn_diff = ev_rt_now - mn_now;
476	evperiodic_start (w);
477		1079
478	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;
479	}	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) */
480	}	1091	}
481	}	1092	}
482		1093	else
483	/* adjust timers. this is easy, as the offset is the same for all */	1094	#endif
484	for (i = 0; i < timercnt; ++i)	1095	{
485	timers [i]->at += diff;
486	}
487
488	static void
489	time_update ()
490	{
491	int i;
492
493	ev_now = ev_time ();	1096	ev_rt_now = ev_time ();
494		1097
495	if (have_monotonic)	1098	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
496	{
497	ev_tstamp odiff = diff;
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	1099	{
501	now = get_clock ();	1100	periodics_reschedule (EV_A);
502	diff = ev_now - now;
503		1101
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1102	/* adjust timers. this is easy, as the offset is the same for all */
505	return; /* all is well */	1103	for (i = 0; i < timercnt; ++i)
506		1104	((WT)timers [i])->at += ev_rt_now - mn_now;
507	ev_now = ev_time ();
508	}	1105	}
509		1106
510	time_jump (diff - odiff);
511	}
512	else
513	{
514	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
515	time_jump (ev_now - now);
516
517	now = ev_now;	1107	mn_now = ev_rt_now;
518	}	1108	}
519	}	1109	}
520		1110
521	int ev_loop_done;	1111	void
		1112	ev_ref (EV_P)
		1113	{
		1114	++activecnt;
		1115	}
522		1116
		1117	void
		1118	ev_unref (EV_P)
		1119	{
		1120	--activecnt;
		1121	}
		1122
		1123	static int loop_done;
		1124
		1125	void
523	void ev_loop (int flags)	1126	ev_loop (EV_P_ int flags)
524	{	1127	{
525	double block;	1128	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	1129	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
527
528	if (checkcnt)
529	{
530	queue_events ((W *)checks, checkcnt, EV_CHECK);
531	call_pending ();
532	}
533		1130
534	do	1131	do
535	{	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
536	/* update fd-related kernel structures */	1144	/* update fd-related kernel structures */
537	fd_reify ();	1145	fd_reify (EV_A);
538		1146
539	/* calculate blocking time */	1147	/* calculate blocking time */
540		1148
541	/* 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	{
542	ev_now = ev_time ();	1157	ev_rt_now = ev_time ();
		1158	mn_now = ev_rt_now;
		1159	}
543		1160
544	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1161	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
545	block = 0.;	1162	block = 0.;
546	else	1163	else
547	{	1164	{
548	block = MAX_BLOCKTIME;	1165	block = MAX_BLOCKTIME;
549		1166
550	if (timercnt)	1167	if (timercnt)
551	{	1168	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	1169	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
553	if (block > to) block = to;	1170	if (block > to) block = to;
554	}	1171	}
555		1172
556	if (periodiccnt)	1173	if (periodiccnt)
557	{	1174	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1175	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
559	if (block > to) block = to;	1176	if (block > to) block = to;
560	}	1177	}
561		1178
562	if (block < 0.) block = 0.;	1179	if (block < 0.) block = 0.;
563	}	1180	}
564		1181
565	method_poll (block);	1182	method_poll (EV_A_ block);
566		1183
567	/* update ev_now, do magic */	1184	/* update ev_rt_now, do magic */
568	time_update ();	1185	time_update (EV_A);
569		1186
570	/* queue pending timers and reschedule them */	1187	/* queue pending timers and reschedule them */
		1188	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	1189	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		1190
574	/* queue idle watchers unless io or timers are pending */	1191	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	1192	if (idlecnt && !any_pending (EV_A))
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	1193	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		1194
578	/* queue check and possibly idle watchers */	1195	/* queue check watchers, to be executed first */
		1196	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	1197	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		1198
581	call_pending ();	1199	call_pending (EV_A);
582	}	1200	}
583	while (!ev_loop_done);	1201	while (activecnt && !loop_done);
		1202
		1203	if (loop_done != 2)
		1204	loop_done = 0;
		1205	}
		1206
		1207	void
		1208	ev_unloop (EV_P_ int how)
		1209	{
		1210	loop_done = how;
584	}	1211	}
585		1212
586	/*****************************************************************************/	1213	/*****************************************************************************/
587		1214
588	static void	1215	inline void
589	wlist_add (WL *head, WL elem)	1216	wlist_add (WL *head, WL elem)
590	{	1217	{
591	elem->next = *head;	1218	elem->next = *head;
592	*head = elem;	1219	*head = elem;
593	}	1220	}
594		1221
595	static void	1222	inline void
596	wlist_del (WL *head, WL elem)	1223	wlist_del (WL *head, WL elem)
597	{	1224	{
598	while (*head)	1225	while (*head)
599	{	1226	{
600	if (*head == elem)	1227	if (*head == elem)
605		1232
606	head = &(*head)->next;	1233	head = &(*head)->next;
607	}	1234	}
608	}	1235	}
609		1236
610	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
611	ev_start (W w, int active)	1248	ev_start (EV_P_ W w, int active)
612	{	1249	{
613	w->pending = 0;	1250	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1251	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1252
614	w->active = active;	1253	w->active = active;
		1254	ev_ref (EV_A);
615	}	1255	}
616		1256
617	static void	1257	inline void
618	ev_stop (W w)	1258	ev_stop (EV_P_ W w)
619	{	1259	{
620	if (w->pending)	1260	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1261	w->active = 0;
624	}	1262	}
625		1263
626	/*****************************************************************************/	1264	/*****************************************************************************/
627		1265
628	void	1266	void
629	evio_start (struct ev_io *w)	1267	ev_io_start (EV_P_ struct ev_io *w)
630	{	1268	{
		1269	int fd = w->fd;
		1270
631	if (ev_is_active (w))	1271	if (ev_is_active (w))
632	return;	1272	return;
633		1273
634	int fd = w->fd;	1274	assert (("ev_io_start called with negative fd", fd >= 0));
635		1275
636	ev_start ((W)w, 1);	1276	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1277	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1278	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		1279
640	++fdchangecnt;	1280	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	1281	}
644		1282
645	void	1283	void
646	evio_stop (struct ev_io *w)	1284	ev_io_stop (EV_P_ struct ev_io *w)
647	{	1285	{
		1286	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	1287	if (!ev_is_active (w))
649	return;	1288	return;
650		1289
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1290	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	1291	ev_stop (EV_A_ (W)w);
653		1292
654	++fdchangecnt;	1293	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1294	}
658		1295
659
660	void	1296	void
661	evtimer_start (struct ev_timer *w)	1297	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1298	{
663	if (ev_is_active (w))	1299	if (ev_is_active (w))
664	return;	1300	return;
665		1301
666	w->at += now;	1302	((WT)w)->at += mn_now;
667		1303
		1304	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1305
668	ev_start ((W)w, ++timercnt);	1306	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1307	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
670	timers [timercnt - 1] = w;	1308	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1309	upheap ((WT *)timers, timercnt - 1);
672	}
673		1310
		1311	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1312	}
		1313
674	void	1314	void
675	evtimer_stop (struct ev_timer *w)	1315	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1316	{
		1317	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1318	if (!ev_is_active (w))
678	return;	1319	return;
679		1320
		1321	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1322
680	if (w->active < timercnt--)	1323	if (((W)w)->active < timercnt--)
681	{	1324	{
682	timers [w->active - 1] = timers [timercnt];	1325	timers [((W)w)->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1326	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
684	}	1327	}
685		1328
		1329	((WT)w)->at = w->repeat;
		1330
686	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
687	}	1332	}
688		1333
689	void	1334	void
690	evperiodic_start (struct ev_periodic *w)	1335	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1336	{
692	if (ev_is_active (w))	1337	if (ev_is_active (w))
693	return;	1338	{
		1339	if (w->repeat)
		1340	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
		1341	else
		1342	ev_timer_stop (EV_A_ w);
		1343	}
		1344	else if (w->repeat)
		1345	ev_timer_start (EV_A_ w);
		1346	}
694		1347
		1348	void
		1349	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1350	{
		1351	if (ev_is_active (w))
		1352	return;
		1353
		1354	if (w->reschedule_cb)
		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.));
695	/* 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 */
696	if (w->interval)
697	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	}
698		1362
699	ev_start ((W)w, ++periodiccnt);	1363	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1364	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
701	periodics [periodiccnt - 1] = w;	1365	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1366	upheap ((WT *)periodics, periodiccnt - 1);
703	}
704		1367
		1368	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1369	}
		1370
705	void	1371	void
706	evperiodic_stop (struct ev_periodic *w)	1372	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1373	{
		1374	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1375	if (!ev_is_active (w))
709	return;	1376	return;
710		1377
		1378	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1379
711	if (w->active < periodiccnt--)	1380	if (((W)w)->active < periodiccnt--)
712	{	1381	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1382	periodics [((W)w)->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1383	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
715	}	1384	}
716		1385
717	ev_stop ((W)w);	1386	ev_stop (EV_A_ (W)w);
718	}	1387	}
719		1388
720	void	1389	void
721	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)
722	{	1399	{
723	if (ev_is_active (w))	1400	if (ev_is_active (w))
724	return;	1401	return;
725		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
726	ev_start ((W)w, 1);	1478	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1479	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1480	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1481
730	if (!w->next)	1482	if (!((WL)w)->next)
731	{	1483	{
		1484	#if WIN32
		1485	signal (w->signum, sighandler);
		1486	#else
732	struct sigaction sa;	1487	struct sigaction sa;
733	sa.sa_handler = sighandler;	1488	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1489	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1490	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1491	sigaction (w->signum, &sa, 0);
		1492	#endif
737	}	1493	}
738	}	1494	}
739		1495
740	void	1496	void
741	evsignal_stop (struct ev_signal *w)	1497	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1498	{
		1499	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1500	if (!ev_is_active (w))
744	return;	1501	return;
745		1502
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1503	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1504	ev_stop (EV_A_ (W)w);
748		1505
749	if (!signals [w->signum - 1].head)	1506	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1507	signal (w->signum, SIG_DFL);
751	}	1508	}
752		1509
753	void evidle_start (struct ev_idle *w)	1510	void
		1511	ev_child_start (EV_P_ struct ev_child *w)
754	{	1512	{
		1513	#if EV_MULTIPLICITY
		1514	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1515	#endif
755	if (ev_is_active (w))	1516	if (ev_is_active (w))
756	return;	1517	return;
757		1518
758	ev_start ((W)w, ++idlecnt);	1519	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	1520	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	1521	}
762		1522
763	void evidle_stop (struct ev_idle *w)	1523	void
		1524	ev_child_stop (EV_P_ struct ev_child *w)
764	{	1525	{
765	idles [w->active - 1] = idles [--idlecnt];	1526	ev_clear_pending (EV_A_ (W)w);
766	ev_stop ((W)w);
767	}
768
769	void evcheck_start (struct ev_check *w)
770	{
771	if (ev_is_active (w))	1527	if (ev_is_active (w))
772	return;	1528	return;
773		1529
774	ev_start ((W)w, ++checkcnt);	1530	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
775	array_needsize (checks, checkmax, checkcnt, );
776	checks [checkcnt - 1] = w;
777	}
778
779	void evcheck_stop (struct ev_check *w)
780	{
781	checks [w->active - 1] = checks [--checkcnt];
782	ev_stop ((W)w);	1531	ev_stop (EV_A_ (W)w);
783	}	1532	}
784		1533
785	/*****************************************************************************/	1534	/*****************************************************************************/
786		1535
787	#if 1	1536	struct ev_once
788		1537	{
789	struct ev_io wio;	1538	struct ev_io io;
790
791	static void
792	sin_cb (struct ev_io *w, int revents)
793	{
794	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
795	}
796
797	static void
798	ocb (struct ev_timer *w, int revents)
799	{
800	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
801	evtimer_stop (w);
802	evtimer_start (w);
803	}
804
805	static void
806	scb (struct ev_signal *w, int revents)
807	{
808	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
809	evio_stop (&wio);
810	evio_start (&wio);
811	}
812
813	static void
814	gcb (struct ev_signal *w, int revents)
815	{
816	fprintf (stderr, "generic %x\n", revents);
817
818	}
819
820	int main (void)
821	{
822	ev_init (0);
823
824	evio_init (&wio, sin_cb, 0, EV_READ);
825	evio_start (&wio);
826
827	struct ev_timer t[10000];
828
829	#if 0
830	int i;
831	for (i = 0; i < 10000; ++i)
832	{
833	struct ev_timer *w = t + i;
834	evw_init (w, ocb, i);
835	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
836	evtimer_start (w);
837	if (drand48 () < 0.5)
838	evtimer_stop (w);
839	}
840	#endif
841
842	struct ev_timer t1;	1539	struct ev_timer to;
843	evtimer_init (&t1, ocb, 5, 10);	1540	void (cb)(int revents, void arg);
844	evtimer_start (&t1);	1541	void *arg;
		1542	};
845		1543
846	struct ev_signal sig;	1544	static void
847	evsignal_init (&sig, scb, SIGQUIT);	1545	once_cb (EV_P_ struct ev_once *once, int revents)
848	evsignal_start (&sig);	1546	{
		1547	void (cb)(int revents, void arg) = once->cb;
		1548	void *arg = once->arg;
849		1549
850	struct ev_check cw;	1550	ev_io_stop (EV_A_ &once->io);
851	evcheck_init (&cw, gcb);	1551	ev_timer_stop (EV_A_ &once->to);
852	evcheck_start (&cw);	1552	ev_free (once);
853		1553
854	struct ev_idle iw;	1554	cb (revents, arg);
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;
861	}	1555	}
862		1556
863	#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	}
864		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	}
865		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));
866		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;
867		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

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Comparing libev/ev.c (file contents): Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs. Revision 1.85 by root, Sat Nov 10 03:13:50 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.85 by root, Sat Nov 10 03:13:50 2007 UTC