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

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 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	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
3	#include <unistd.h>	37	#include <unistd.h>
4	#include <fcntl.h>	38	#include <fcntl.h>
5	#include <signal.h>	39	#include <signal.h>
7		41
8	#include <stdio.h>	42	#include <stdio.h>
9		43
10	#include <assert.h>	44	#include <assert.h>
11	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
12	#include <sys/time.h>	50	#include <sys/time.h>
13	#include <time.h>	51	#include <time.h>
14		52
15	#define HAVE_EPOLL 1	53	/**/
16		54
17	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USE_POLL
		64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
18	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
19	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
20	# endif	84	#endif
21	#endif
22		85
23	#ifndef HAVE_SELECT
24	# define HAVE_SELECT 1
25	#endif
26
27	#ifndef HAVE_EPOLL
28	# define HAVE_EPOLL 0
29	#endif
30
31	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
33	#endif	89	#endif
		90
		91	/**/
34		92
35	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
36	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
37		97
38	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
39		113
40	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
41	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
42	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
43		117
44	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
45	ev_tstamp ev_now;
46	int ev_method;
47
48	static int have_monotonic; /* runtime */
49
50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
51	static void (*method_modify)(int fd, int oev, int nev);
52	static void (*method_poll)(ev_tstamp timeout);
53		119
54	/*****************************************************************************/	120	/*****************************************************************************/
55		121
56	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
57	ev_time (void)	156	ev_time (void)
58	{	157	{
59	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
60	struct timespec ts;	159	struct timespec ts;
61	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
62	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
63	#else	162	#else
64	struct timeval tv;	163	struct timeval tv;
65	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
66	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
67	#endif	166	#endif
68	}	167	}
69		168
70	static ev_tstamp	169	inline ev_tstamp
71	get_clock (void)	170	get_clock (void)
72	{	171	{
73	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
74	if (have_monotonic)	173	if (expect_true (have_monotonic))
75	{	174	{
76	struct timespec ts;	175	struct timespec ts;
77	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
78	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
79	}	178	}
80	#endif	179	#endif
81		180
82	return ev_time ();	181	return ev_time ();
83	}	182	}
84		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		191
85	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
86	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
87	{ \	194	{ \
88	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
		196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
89	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
90	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	204	cur = newcnt; \
92	}	205	}
93		206
94	/*****************************************************************************/	207	/*****************************************************************************/
95		208
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	209	static void
109	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
110	{	211	{
111	while (count--)	212	while (count--)
112	{	213	{
113	base->head = 0;	214	base->head = 0;
114	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
115	++base;	218	++base;
116	}	219	}
117	}	220	}
118		221
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void	222	static void
129	event (W w, int events)	223	event (EV_P_ W w, int events)
130	{	224	{
131	if (w->active)	225	if (w->pending)
132	{	226	{
133	w->pending = ++pendingcnt;
134	array_needsize (pendings, pendingmax, pendingcnt, );
135	pendings [pendingcnt - 1].w = w;
136	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
137	}	229	}
138	}
139		230
		231	w->pending = ++pendingcnt [ABSPRI (w)];
		232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		233	pendings [ABSPRI (w)][w->pending - 1].w = w;
		234	pendings [ABSPRI (w)][w->pending - 1].events = events;
		235	}
		236
140	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
141	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
142	{	248	{
143	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
144	struct ev_io *w;	250	struct ev_io *w;
145		251
146	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
147	{	253	{
148	int ev = w->events & events;	254	int ev = w->events & events;
149		255
150	if (ev)	256	if (ev)
151	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
152	}	258	}
153	}	259	}
154		260
		261	/*****************************************************************************/
		262
155	static void	263	static void
156	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
157	{	265	{
158	int i;	266	int i;
159		267
160	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
161	event (events [i], type);	269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		277	events \|= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify \|\| fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
		314	}
		315
		316	/* called on EBADF to verify fds */
		317	static void
		318	fd_ebadf (EV_P)
		319	{
		320	int fd;
		321
		322	for (fd = 0; fd < anfdmax; ++fd)
		323	if (anfds [fd].events)
		324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
		340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
162	}	356	}
163		357
164	/*****************************************************************************/	358	/*****************************************************************************/
165		359
166	static struct ev_timer **timers;
167	static int timermax, timercnt;
168
169	static struct ev_periodic **periodics;
170	static int periodicmax, periodiccnt;
171
172	static void	360	static void
173	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
174	{	362	{
175	WT w = timers [k];	363	WT w = heap [k];
176		364
177	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
178	{	366	{
179	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
180	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
181	k >>= 1;	369	k >>= 1;
182	}	370	}
183		371
184	timers [k] = w;	372	heap [k] = w;
185	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
186		374
187	}	375	}
188		376
189	static void	377	static void
190	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
191	{	379	{
192	WT w = timers [k];	380	WT w = heap [k];
193		381
194	while (k < (N >> 1))	382	while (k < (N >> 1))
195	{	383	{
196	int j = k << 1;	384	int j = k << 1;
197		385
198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
199	++j;	387	++j;
200		388
201	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
202	break;	390	break;
203		391
204	timers [k] = timers [j];	392	heap [k] = heap [j];
205	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
206	k = j;	394	k = j;
207	}	395	}
208		396
209	timers [k] = w;	397	heap [k] = w;
210	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
211	}	399	}
212		400
213	/*****************************************************************************/	401	/*****************************************************************************/
214		402
215	typedef struct	403	typedef struct
216	{	404	{
217	struct ev_signal *head;	405	struct ev_watcher_list *head;
218	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
219	} ANSIG;	407	} ANSIG;
220		408
221	static ANSIG *signals;	409	static ANSIG *signals;
222	static int signalmax;	410	static int signalmax;
223		411
224	static int sigpipe [2];	412	static int sigpipe [2];
225	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
226	static struct ev_io sigev;	414	static struct ev_io sigev;
227		415
228	static void	416	static void
229	signals_init (ANSIG *base, int count)	417	signals_init (ANSIG *base, int count)
230	{	418	{
231	while (count--)	419	while (count--)
232	{	420	{
233	base->head = 0;	421	base->head = 0;
234	base->gotsig = 0;	422	base->gotsig = 0;
		423
235	++base;	424	++base;
236	}	425	}
237	}	426	}
238		427
239	static void	428	static void
…		…
241	{	430	{
242	signals [signum - 1].gotsig = 1;	431	signals [signum - 1].gotsig = 1;
243		432
244	if (!gotsig)	433	if (!gotsig)
245	{	434	{
		435	int old_errno = errno;
246	gotsig = 1;	436	gotsig = 1;
247	write (sigpipe [1], &gotsig, 1);	437	write (sigpipe [1], &signum, 1);
		438	errno = old_errno;
248	}	439	}
249	}	440	}
250		441
251	static void	442	static void
252	sigcb (struct ev_io *iow, int revents)	443	sigcb (EV_P_ struct ev_io *iow, int revents)
253	{	444	{
254	struct ev_signal *w;	445	struct ev_watcher_list *w;
255	int sig;	446	int signum;
256		447
		448	read (sigpipe [0], &revents, 1);
257	gotsig = 0;	449	gotsig = 0;
258	read (sigpipe [0], &revents, 1);
259		450
260	for (sig = signalmax; sig--; )	451	for (signum = signalmax; signum--; )
261	if (signals [sig].gotsig)	452	if (signals [signum].gotsig)
262	{	453	{
263	signals [sig].gotsig = 0;	454	signals [signum].gotsig = 0;
264		455
265	for (w = signals [sig].head; w; w = w->next)	456	for (w = signals [signum].head; w; w = w->next)
266	event ((W)w, EV_SIGNAL);	457	event (EV_A_ (W)w, EV_SIGNAL);
267	}	458	}
268	}	459	}
269		460
270	static void	461	static void
271	siginit (void)	462	siginit (EV_P)
272	{	463	{
		464	#ifndef WIN32
273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
275		467
276	/* rather than sort out wether we really need nb, set it */	468	/* rather than sort out wether we really need nb, set it */
277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		471	#endif
279		472
280	evio_set (&sigev, sigpipe [0], EV_READ);	473	ev_io_set (&sigev, sigpipe [0], EV_READ);
281	evio_start (&sigev);	474	ev_io_start (EV_A_ &sigev);
		475	ev_unref (EV_A); /* child watcher should not keep loop alive */
282	}	476	}
283		477
284	/*****************************************************************************/	478	/*****************************************************************************/
285		479
286	static struct ev_idle **idles;	480	#ifndef WIN32
287	static int idlemax, idlecnt;
288		481
289	static struct ev_check **checks;	482	static struct ev_child *childs [PID_HASHSIZE];
290	static int checkmax, checkcnt;	483	static struct ev_signal childev;
		484
		485	#ifndef WCONTINUED
		486	# define WCONTINUED 0
		487	#endif
		488
		489	static void
		490	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		491	{
		492	struct ev_child *w;
		493
		494	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		495	if (w->pid == pid \|\| !w->pid)
		496	{
		497	w->priority = sw->priority; /* need to do it now */
		498	w->rpid = pid;
		499	w->rstatus = status;
		500	event (EV_A_ (W)w, EV_CHILD);
		501	}
		502	}
		503
		504	static void
		505	childcb (EV_P_ struct ev_signal *sw, int revents)
		506	{
		507	int pid, status;
		508
		509	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		510	{
		511	/* make sure we are called again until all childs have been reaped */
		512	event (EV_A_ (W)sw, EV_SIGNAL);
		513
		514	child_reap (EV_A_ sw, pid, pid, status);
		515	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		516	}
		517	}
		518
		519	#endif
291		520
292	/*****************************************************************************/	521	/*****************************************************************************/
293		522
		523	#if EV_USE_KQUEUE
		524	# include "ev_kqueue.c"
		525	#endif
294	#if HAVE_EPOLL	526	#if EV_USE_EPOLL
295	# include "ev_epoll.c"	527	# include "ev_epoll.c"
296	#endif	528	#endif
		529	#if EV_USE_POLL
		530	# include "ev_poll.c"
		531	#endif
297	#if HAVE_SELECT	532	#if EV_USE_SELECT
298	# include "ev_select.c"	533	# include "ev_select.c"
299	#endif	534	#endif
300		535
301	int ev_init (int flags)	536	int
		537	ev_version_major (void)
302	{	538	{
		539	return EV_VERSION_MAJOR;
		540	}
		541
		542	int
		543	ev_version_minor (void)
		544	{
		545	return EV_VERSION_MINOR;
		546	}
		547
		548	/* return true if we are running with elevated privileges and should ignore env variables */
		549	static int
		550	enable_secure (void)
		551	{
		552	#ifdef WIN32
		553	return 0;
		554	#else
		555	return getuid () != geteuid ()
		556	\|\| getgid () != getegid ();
		557	#endif
		558	}
		559
		560	int
		561	ev_method (EV_P)
		562	{
		563	return method;
		564	}
		565
		566	static void
		567	loop_init (EV_P_ int methods)
		568	{
		569	if (!method)
		570	{
303	#if HAVE_MONOTONIC	571	#if EV_USE_MONOTONIC
304	{	572	{
305	struct timespec ts;	573	struct timespec ts;
306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
307	have_monotonic = 1;	575	have_monotonic = 1;
308	}	576	}
309	#endif	577	#endif
310		578
311	ev_now = ev_time ();	579	rt_now = ev_time ();
312	now = get_clock ();	580	mn_now = get_clock ();
313	diff = ev_now - now;	581	now_floor = mn_now;
		582	rtmn_diff = rt_now - mn_now;
314		583
		584	if (methods == EVMETHOD_AUTO)
		585	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		586	methods = atoi (getenv ("LIBEV_METHODS"));
		587	else
		588	methods = EVMETHOD_ANY;
		589
		590	method = 0;
		591	#if EV_USE_KQUEUE
		592	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		593	#endif
		594	#if EV_USE_EPOLL
		595	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		596	#endif
		597	#if EV_USE_POLL
		598	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		599	#endif
		600	#if EV_USE_SELECT
		601	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		602	#endif
		603	}
		604	}
		605
		606	void
		607	loop_destroy (EV_P)
		608	{
		609	#if EV_USE_KQUEUE
		610	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		611	#endif
		612	#if EV_USE_EPOLL
		613	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		614	#endif
		615	#if EV_USE_POLL
		616	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		617	#endif
		618	#if EV_USE_SELECT
		619	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		620	#endif
		621
		622	method = 0;
		623	/TODO/
		624	}
		625
		626	void
		627	loop_fork (EV_P)
		628	{
		629	/TODO/
		630	#if EV_USE_EPOLL
		631	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		632	#endif
		633	#if EV_USE_KQUEUE
		634	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		635	#endif
		636	}
		637
		638	#if EV_MULTIPLICITY
		639	struct ev_loop *
		640	ev_loop_new (int methods)
		641	{
		642	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		643
		644	loop_init (EV_A_ methods);
		645
		646	if (ev_methods (EV_A))
		647	return loop;
		648
		649	return 0;
		650	}
		651
		652	void
		653	ev_loop_destroy (EV_P)
		654	{
		655	loop_destroy (EV_A);
		656	free (loop);
		657	}
		658
		659	void
		660	ev_loop_fork (EV_P)
		661	{
		662	loop_fork (EV_A);
		663	}
		664
		665	#endif
		666
		667	#if EV_MULTIPLICITY
		668	struct ev_loop default_loop_struct;
		669	static struct ev_loop *default_loop;
		670
		671	struct ev_loop *
		672	#else
		673	static int default_loop;
		674
		675	int
		676	#endif
		677	ev_default_loop (int methods)
		678	{
		679	if (sigpipe [0] == sigpipe [1])
315	if (pipe (sigpipe))	680	if (pipe (sigpipe))
316	return 0;	681	return 0;
317		682
318	ev_method = EVMETHOD_NONE;	683	if (!default_loop)
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
321	#endif
322	#if HAVE_SELECT
323	if (ev_method == EVMETHOD_NONE) select_init (flags);
324	#endif
325
326	if (ev_method)
327	{	684	{
		685	#if EV_MULTIPLICITY
		686	struct ev_loop *loop = default_loop = &default_loop_struct;
		687	#else
		688	default_loop = 1;
		689	#endif
		690
		691	loop_init (EV_A_ methods);
		692
		693	if (ev_method (EV_A))
		694	{
328	evw_init (&sigev, sigcb);	695	ev_watcher_init (&sigev, sigcb);
		696	ev_set_priority (&sigev, EV_MAXPRI);
329	siginit ();	697	siginit (EV_A);
330	}
331		698
332	return ev_method;	699	#ifndef WIN32
333	}	700	ev_signal_init (&childev, childcb, SIGCHLD);
334		701	ev_set_priority (&childev, EV_MAXPRI);
335	/*****************************************************************************/	702	ev_signal_start (EV_A_ &childev);
336		703	ev_unref (EV_A); /* child watcher should not keep loop alive */
337	void ev_prefork (void)
338	{
339	/* nop */
340	}
341
342	void ev_postfork_parent (void)
343	{
344	/* nop */
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif	704	#endif
		705	}
		706	else
		707	default_loop = 0;
		708	}
353		709
		710	return default_loop;
		711	}
		712
		713	void
		714	ev_default_destroy (void)
		715	{
		716	#if EV_MULTIPLICITY
		717	struct ev_loop *loop = default_loop;
		718	#endif
		719
		720	ev_ref (EV_A); /* child watcher */
		721	ev_signal_stop (EV_A_ &childev);
		722
		723	ev_ref (EV_A); /* signal watcher */
354	evio_stop (&sigev);	724	ev_io_stop (EV_A_ &sigev);
		725
		726	close (sigpipe [0]); sigpipe [0] = 0;
		727	close (sigpipe [1]); sigpipe [1] = 0;
		728
		729	loop_destroy (EV_A);
		730	}
		731
		732	void
		733	ev_default_fork (EV_P)
		734	{
		735	loop_fork (EV_A);
		736
		737	ev_io_stop (EV_A_ &sigev);
355	close (sigpipe [0]);	738	close (sigpipe [0]);
356	close (sigpipe [1]);	739	close (sigpipe [1]);
357	pipe (sigpipe);	740	pipe (sigpipe);
		741
		742	ev_ref (EV_A); /* signal watcher */
358	siginit ();	743	siginit (EV_A);
359	}	744	}
360		745
361	/*****************************************************************************/	746	/*****************************************************************************/
362		747
363	static void	748	static void
364	fd_reify (void)	749	call_pending (EV_P)
365	{	750	{
366	int i;	751	int pri;
367		752
368	for (i = 0; i < fdchangecnt; ++i)	753	for (pri = NUMPRI; pri--; )
369	{	754	while (pendingcnt [pri])
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{	755	{
381	method_modify (fd, anfd->wev, wev);	756	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
382	anfd->wev = wev;
383	}
384	}
385		757
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)	758	if (p->w)
399	{	759	{
400	p->w->pending = 0;	760	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	761	p->w->cb (EV_A_ p->w, p->events);
402	}	762	}
403	}	763	}
404
405	pendingcnt = 0;
406	}	764	}
407		765
408	static void	766	static void
409	timers_reify ()	767	timers_reify (EV_P)
410	{	768	{
411	while (timercnt && timers [0]->at <= now)	769	while (timercnt && timers [0]->at <= mn_now)
412	{	770	{
413	struct ev_timer *w = timers [0];	771	struct ev_timer *w = timers [0];
414
415	event ((W)w, EV_TIMEOUT);
416		772
417	/* first reschedule or stop timer */	773	/* first reschedule or stop timer */
418	if (w->repeat)	774	if (w->repeat)
419	{	775	{
		776	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
420	w->at = now + w->repeat;	777	w->at = mn_now + w->repeat;
421	assert (("timer timeout in the past, negative repeat?", w->at > now));
422	downheap ((WT *)timers, timercnt, 0);	778	downheap ((WT *)timers, timercnt, 0);
423	}	779	}
424	else	780	else
425	evtimer_stop (w); /* nonrepeating: stop timer */	781	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
426	}
427	}
428		782
		783	event (EV_A_ (W)w, EV_TIMEOUT);
		784	}
		785	}
		786
429	static void	787	static void
430	periodics_reify ()	788	periodics_reify (EV_P)
431	{	789	{
432	while (periodiccnt && periodics [0]->at <= ev_now)	790	while (periodiccnt && periodics [0]->at <= rt_now)
433	{	791	{
434	struct ev_periodic *w = periodics [0];	792	struct ev_periodic *w = periodics [0];
435		793
436	/* first reschedule or stop timer */	794	/* first reschedule or stop timer */
437	if (w->interval)	795	if (w->interval)
438	{	796	{
439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	797	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	798	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
441	downheap ((WT *)periodics, periodiccnt, 0);	799	downheap ((WT *)periodics, periodiccnt, 0);
442	}	800	}
443	else	801	else
444	evperiodic_stop (w); /* nonrepeating: stop timer */	802	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
445		803
446	event ((W)w, EV_TIMEOUT);	804	event (EV_A_ (W)w, EV_PERIODIC);
447	}	805	}
448	}	806	}
449		807
450	static void	808	static void
451	periodics_reschedule (ev_tstamp diff)	809	periodics_reschedule (EV_P)
452	{	810	{
453	int i;	811	int i;
454		812
455	/* adjust periodics after time jump */	813	/* adjust periodics after time jump */
456	for (i = 0; i < periodiccnt; ++i)	814	for (i = 0; i < periodiccnt; ++i)
457	{	815	{
458	struct ev_periodic *w = periodics [i];	816	struct ev_periodic *w = periodics [i];
459		817
460	if (w->interval)	818	if (w->interval)
461	{	819	{
462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	820	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
463		821
464	if (fabs (diff) >= 1e-4)	822	if (fabs (diff) >= 1e-4)
465	{	823	{
466	evperiodic_stop (w);	824	ev_periodic_stop (EV_A_ w);
467	evperiodic_start (w);	825	ev_periodic_start (EV_A_ w);
468		826
469	i = 0; /* restart loop, inefficient, but time jumps should be rare */	827	i = 0; /* restart loop, inefficient, but time jumps should be rare */
470	}	828	}
471	}	829	}
472	}	830	}
473	}	831	}
474		832
		833	inline int
		834	time_update_monotonic (EV_P)
		835	{
		836	mn_now = get_clock ();
		837
		838	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		839	{
		840	rt_now = rtmn_diff + mn_now;
		841	return 0;
		842	}
		843	else
		844	{
		845	now_floor = mn_now;
		846	rt_now = ev_time ();
		847	return 1;
		848	}
		849	}
		850
475	static void	851	static void
476	time_update ()	852	time_update (EV_P)
477	{	853	{
478	int i;	854	int i;
479		855
480	ev_now = ev_time ();	856	#if EV_USE_MONOTONIC
481
482	if (have_monotonic)	857	if (expect_true (have_monotonic))
483	{	858	{
484	ev_tstamp odiff = diff;	859	if (time_update_monotonic (EV_A))
485
486	for (i = 4; --i; ) /* loop a few times, before making important decisions */
487	{	860	{
488	now = get_clock ();	861	ev_tstamp odiff = rtmn_diff;
		862
		863	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		864	{
489	diff = ev_now - now;	865	rtmn_diff = rt_now - mn_now;
490		866
491	if (fabs (odiff - diff) < MIN_TIMEJUMP)	867	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
492	return; /* all is well */	868	return; /* all is well */
493		869
494	ev_now = ev_time ();	870	rt_now = ev_time ();
		871	mn_now = get_clock ();
		872	now_floor = mn_now;
		873	}
		874
		875	periodics_reschedule (EV_A);
		876	/* no timer adjustment, as the monotonic clock doesn't jump */
		877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
495	}	878	}
496
497	periodics_reschedule (diff - odiff);
498	/* no timer adjustment, as the monotonic clock doesn't jump */
499	}	879	}
500	else	880	else
		881	#endif
501	{	882	{
502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	883	rt_now = ev_time ();
		884
		885	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
503	{	886	{
504	periodics_reschedule (ev_now - now);	887	periodics_reschedule (EV_A);
505		888
506	/* adjust timers. this is easy, as the offset is the same for all */	889	/* adjust timers. this is easy, as the offset is the same for all */
507	for (i = 0; i < timercnt; ++i)	890	for (i = 0; i < timercnt; ++i)
508	timers [i]->at += diff;	891	timers [i]->at += rt_now - mn_now;
509	}	892	}
510		893
511	now = ev_now;	894	mn_now = rt_now;
512	}	895	}
513	}	896	}
514		897
515	int ev_loop_done;	898	void
		899	ev_ref (EV_P)
		900	{
		901	++activecnt;
		902	}
516		903
		904	void
		905	ev_unref (EV_P)
		906	{
		907	--activecnt;
		908	}
		909
		910	static int loop_done;
		911
		912	void
517	void ev_loop (int flags)	913	ev_loop (EV_P_ int flags)
518	{	914	{
519	double block;	915	double block;
520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	916	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
521
522	if (checkcnt)
523	{
524	queue_events ((W *)checks, checkcnt, EV_CHECK);
525	call_pending ();
526	}
527		917
528	do	918	do
529	{	919	{
		920	/* queue check watchers (and execute them) */
		921	if (expect_false (preparecnt))
		922	{
		923	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		924	call_pending (EV_A);
		925	}
		926
530	/* update fd-related kernel structures */	927	/* update fd-related kernel structures */
531	fd_reify ();	928	fd_reify (EV_A);
532		929
533	/* calculate blocking time */	930	/* calculate blocking time */
534		931
535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	932	/* we only need this for !monotonic clockor timers, but as we basically
		933	always have timers, we just calculate it always */
		934	#if EV_USE_MONOTONIC
		935	if (expect_true (have_monotonic))
		936	time_update_monotonic (EV_A);
		937	else
		938	#endif
		939	{
536	ev_now = ev_time ();	940	rt_now = ev_time ();
		941	mn_now = rt_now;
		942	}
537		943
538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	944	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
539	block = 0.;	945	block = 0.;
540	else	946	else
541	{	947	{
542	block = MAX_BLOCKTIME;	948	block = MAX_BLOCKTIME;
543		949
544	if (timercnt)	950	if (timercnt)
545	{	951	{
546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	952	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
547	if (block > to) block = to;	953	if (block > to) block = to;
548	}	954	}
549		955
550	if (periodiccnt)	956	if (periodiccnt)
551	{	957	{
552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	958	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
553	if (block > to) block = to;	959	if (block > to) block = to;
554	}	960	}
555		961
556	if (block < 0.) block = 0.;	962	if (block < 0.) block = 0.;
557	}	963	}
558		964
559	method_poll (block);	965	method_poll (EV_A_ block);
560		966
561	/* update ev_now, do magic */	967	/* update rt_now, do magic */
562	time_update ();	968	time_update (EV_A);
563		969
564	/* queue pending timers and reschedule them */	970	/* queue pending timers and reschedule them */
		971	timers_reify (EV_A); /* relative timers called last */
565	periodics_reify (); /* absolute timers first */	972	periodics_reify (EV_A); /* absolute timers called first */
566	timers_reify (); /* relative timers second */
567		973
568	/* queue idle watchers unless io or timers are pending */	974	/* queue idle watchers unless io or timers are pending */
569	if (!pendingcnt)	975	if (!pendingcnt)
570	queue_events ((W *)idles, idlecnt, EV_IDLE);	976	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
571		977
572	/* queue check and possibly idle watchers */	978	/* queue check watchers, to be executed first */
		979	if (checkcnt)
573	queue_events ((W *)checks, checkcnt, EV_CHECK);	980	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
574		981
575	call_pending ();	982	call_pending (EV_A);
576	}	983	}
577	while (!ev_loop_done);	984	while (activecnt && !loop_done);
578		985
579	if (ev_loop_done != 2)	986	if (loop_done != 2)
580	ev_loop_done = 0;	987	loop_done = 0;
		988	}
		989
		990	void
		991	ev_unloop (EV_P_ int how)
		992	{
		993	loop_done = how;
581	}	994	}
582		995
583	/*****************************************************************************/	996	/*****************************************************************************/
584		997
585	static void	998	inline void
586	wlist_add (WL *head, WL elem)	999	wlist_add (WL *head, WL elem)
587	{	1000	{
588	elem->next = *head;	1001	elem->next = *head;
589	*head = elem;	1002	*head = elem;
590	}	1003	}
591		1004
592	static void	1005	inline void
593	wlist_del (WL *head, WL elem)	1006	wlist_del (WL *head, WL elem)
594	{	1007	{
595	while (*head)	1008	while (*head)
596	{	1009	{
597	if (*head == elem)	1010	if (*head == elem)
…		…
602		1015
603	head = &(*head)->next;	1016	head = &(*head)->next;
604	}	1017	}
605	}	1018	}
606		1019
607	static void	1020	inline void
608	ev_clear (W w)	1021	ev_clear_pending (EV_P_ W w)
609	{	1022	{
610	if (w->pending)	1023	if (w->pending)
611	{	1024	{
612	pendings [w->pending - 1].w = 0;	1025	pendings [ABSPRI (w)][w->pending - 1].w = 0;
613	w->pending = 0;	1026	w->pending = 0;
614	}	1027	}
615	}	1028	}
616		1029
617	static void	1030	inline void
618	ev_start (W w, int active)	1031	ev_start (EV_P_ W w, int active)
619	{	1032	{
		1033	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1034	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1035
620	w->active = active;	1036	w->active = active;
		1037	ev_ref (EV_A);
621	}	1038	}
622		1039
623	static void	1040	inline void
624	ev_stop (W w)	1041	ev_stop (EV_P_ W w)
625	{	1042	{
		1043	ev_unref (EV_A);
626	w->active = 0;	1044	w->active = 0;
627	}	1045	}
628		1046
629	/*****************************************************************************/	1047	/*****************************************************************************/
630		1048
631	void	1049	void
632	evio_start (struct ev_io *w)	1050	ev_io_start (EV_P_ struct ev_io *w)
633	{	1051	{
		1052	int fd = w->fd;
		1053
634	if (ev_is_active (w))	1054	if (ev_is_active (w))
635	return;	1055	return;
636		1056
637	int fd = w->fd;	1057	assert (("ev_io_start called with negative fd", fd >= 0));
638		1058
639	ev_start ((W)w, 1);	1059	ev_start (EV_A_ (W)w, 1);
640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1060	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
641	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1061	wlist_add ((WL *)&anfds[fd].head, (WL)w);
642		1062
643	++fdchangecnt;	1063	fd_change (EV_A_ fd);
644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
645	fdchanges [fdchangecnt - 1] = fd;
646	}	1064	}
647		1065
648	void	1066	void
649	evio_stop (struct ev_io *w)	1067	ev_io_stop (EV_P_ struct ev_io *w)
650	{	1068	{
651	ev_clear ((W)w);	1069	ev_clear_pending (EV_A_ (W)w);
652	if (!ev_is_active (w))	1070	if (!ev_is_active (w))
653	return;	1071	return;
654		1072
655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1073	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
656	ev_stop ((W)w);	1074	ev_stop (EV_A_ (W)w);
657		1075
658	++fdchangecnt;	1076	fd_change (EV_A_ w->fd);
659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
660	fdchanges [fdchangecnt - 1] = w->fd;
661	}	1077	}
662		1078
663	void	1079	void
664	evtimer_start (struct ev_timer *w)	1080	ev_timer_start (EV_P_ struct ev_timer *w)
665	{	1081	{
666	if (ev_is_active (w))	1082	if (ev_is_active (w))
667	return;	1083	return;
668		1084
669	w->at += now;	1085	w->at += mn_now;
670		1086
671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1087	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
672		1088
673	ev_start ((W)w, ++timercnt);	1089	ev_start (EV_A_ (W)w, ++timercnt);
674	array_needsize (timers, timermax, timercnt, );	1090	array_needsize (timers, timermax, timercnt, );
675	timers [timercnt - 1] = w;	1091	timers [timercnt - 1] = w;
676	upheap ((WT *)timers, timercnt - 1);	1092	upheap ((WT *)timers, timercnt - 1);
677	}	1093	}
678		1094
679	void	1095	void
680	evtimer_stop (struct ev_timer *w)	1096	ev_timer_stop (EV_P_ struct ev_timer *w)
681	{	1097	{
682	ev_clear ((W)w);	1098	ev_clear_pending (EV_A_ (W)w);
683	if (!ev_is_active (w))	1099	if (!ev_is_active (w))
684	return;	1100	return;
685		1101
686	if (w->active < timercnt--)	1102	if (w->active < timercnt--)
687	{	1103	{
…		…
689	downheap ((WT *)timers, timercnt, w->active - 1);	1105	downheap ((WT *)timers, timercnt, w->active - 1);
690	}	1106	}
691		1107
692	w->at = w->repeat;	1108	w->at = w->repeat;
693		1109
694	ev_stop ((W)w);	1110	ev_stop (EV_A_ (W)w);
695	}	1111	}
696		1112
697	void	1113	void
698	evtimer_again (struct ev_timer *w)	1114	ev_timer_again (EV_P_ struct ev_timer *w)
699	{	1115	{
700	if (ev_is_active (w))	1116	if (ev_is_active (w))
701	{	1117	{
702	if (w->repeat)	1118	if (w->repeat)
703	{	1119	{
704	w->at = now + w->repeat;	1120	w->at = mn_now + w->repeat;
705	downheap ((WT *)timers, timercnt, w->active - 1);	1121	downheap ((WT *)timers, timercnt, w->active - 1);
706	}	1122	}
707	else	1123	else
708	evtimer_stop (w);	1124	ev_timer_stop (EV_A_ w);
709	}	1125	}
710	else if (w->repeat)	1126	else if (w->repeat)
711	evtimer_start (w);	1127	ev_timer_start (EV_A_ w);
712	}	1128	}
713		1129
714	void	1130	void
715	evperiodic_start (struct ev_periodic *w)	1131	ev_periodic_start (EV_P_ struct ev_periodic *w)
716	{	1132	{
717	if (ev_is_active (w))	1133	if (ev_is_active (w))
718	return;	1134	return;
719		1135
720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1136	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
721		1137
722	/* this formula differs from the one in periodic_reify because we do not always round up */	1138	/* this formula differs from the one in periodic_reify because we do not always round up */
723	if (w->interval)	1139	if (w->interval)
724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1140	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
725		1141
726	ev_start ((W)w, ++periodiccnt);	1142	ev_start (EV_A_ (W)w, ++periodiccnt);
727	array_needsize (periodics, periodicmax, periodiccnt, );	1143	array_needsize (periodics, periodicmax, periodiccnt, );
728	periodics [periodiccnt - 1] = w;	1144	periodics [periodiccnt - 1] = w;
729	upheap ((WT *)periodics, periodiccnt - 1);	1145	upheap ((WT *)periodics, periodiccnt - 1);
730	}	1146	}
731		1147
732	void	1148	void
733	evperiodic_stop (struct ev_periodic *w)	1149	ev_periodic_stop (EV_P_ struct ev_periodic *w)
734	{	1150	{
735	ev_clear ((W)w);	1151	ev_clear_pending (EV_A_ (W)w);
736	if (!ev_is_active (w))	1152	if (!ev_is_active (w))
737	return;	1153	return;
738		1154
739	if (w->active < periodiccnt--)	1155	if (w->active < periodiccnt--)
740	{	1156	{
741	periodics [w->active - 1] = periodics [periodiccnt];	1157	periodics [w->active - 1] = periodics [periodiccnt];
742	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1158	downheap ((WT *)periodics, periodiccnt, w->active - 1);
743	}	1159	}
744		1160
745	ev_stop ((W)w);	1161	ev_stop (EV_A_ (W)w);
746	}	1162	}
747		1163
748	void	1164	void
749	evsignal_start (struct ev_signal *w)	1165	ev_idle_start (EV_P_ struct ev_idle *w)
750	{	1166	{
751	if (ev_is_active (w))	1167	if (ev_is_active (w))
752	return;	1168	return;
753		1169
		1170	ev_start (EV_A_ (W)w, ++idlecnt);
		1171	array_needsize (idles, idlemax, idlecnt, );
		1172	idles [idlecnt - 1] = w;
		1173	}
		1174
		1175	void
		1176	ev_idle_stop (EV_P_ struct ev_idle *w)
		1177	{
		1178	ev_clear_pending (EV_A_ (W)w);
		1179	if (ev_is_active (w))
		1180	return;
		1181
		1182	idles [w->active - 1] = idles [--idlecnt];
		1183	ev_stop (EV_A_ (W)w);
		1184	}
		1185
		1186	void
		1187	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1188	{
		1189	if (ev_is_active (w))
		1190	return;
		1191
		1192	ev_start (EV_A_ (W)w, ++preparecnt);
		1193	array_needsize (prepares, preparemax, preparecnt, );
		1194	prepares [preparecnt - 1] = w;
		1195	}
		1196
		1197	void
		1198	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1199	{
		1200	ev_clear_pending (EV_A_ (W)w);
		1201	if (ev_is_active (w))
		1202	return;
		1203
		1204	prepares [w->active - 1] = prepares [--preparecnt];
		1205	ev_stop (EV_A_ (W)w);
		1206	}
		1207
		1208	void
		1209	ev_check_start (EV_P_ struct ev_check *w)
		1210	{
		1211	if (ev_is_active (w))
		1212	return;
		1213
		1214	ev_start (EV_A_ (W)w, ++checkcnt);
		1215	array_needsize (checks, checkmax, checkcnt, );
		1216	checks [checkcnt - 1] = w;
		1217	}
		1218
		1219	void
		1220	ev_check_stop (EV_P_ struct ev_check *w)
		1221	{
		1222	ev_clear_pending (EV_A_ (W)w);
		1223	if (ev_is_active (w))
		1224	return;
		1225
		1226	checks [w->active - 1] = checks [--checkcnt];
		1227	ev_stop (EV_A_ (W)w);
		1228	}
		1229
		1230	#ifndef SA_RESTART
		1231	# define SA_RESTART 0
		1232	#endif
		1233
		1234	void
		1235	ev_signal_start (EV_P_ struct ev_signal *w)
		1236	{
		1237	#if EV_MULTIPLICITY
		1238	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1239	#endif
		1240	if (ev_is_active (w))
		1241	return;
		1242
		1243	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1244
754	ev_start ((W)w, 1);	1245	ev_start (EV_A_ (W)w, 1);
755	array_needsize (signals, signalmax, w->signum, signals_init);	1246	array_needsize (signals, signalmax, w->signum, signals_init);
756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1247	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
757		1248
758	if (!w->next)	1249	if (!w->next)
759	{	1250	{
760	struct sigaction sa;	1251	struct sigaction sa;
761	sa.sa_handler = sighandler;	1252	sa.sa_handler = sighandler;
762	sigfillset (&sa.sa_mask);	1253	sigfillset (&sa.sa_mask);
763	sa.sa_flags = 0;	1254	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
764	sigaction (w->signum, &sa, 0);	1255	sigaction (w->signum, &sa, 0);
765	}	1256	}
766	}	1257	}
767		1258
768	void	1259	void
769	evsignal_stop (struct ev_signal *w)	1260	ev_signal_stop (EV_P_ struct ev_signal *w)
770	{	1261	{
771	ev_clear ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
773	return;	1264	return;
774		1265
775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1266	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
776	ev_stop ((W)w);	1267	ev_stop (EV_A_ (W)w);
777		1268
778	if (!signals [w->signum - 1].head)	1269	if (!signals [w->signum - 1].head)
779	signal (w->signum, SIG_DFL);	1270	signal (w->signum, SIG_DFL);
780	}	1271	}
781		1272
782	void evidle_start (struct ev_idle *w)	1273	void
		1274	ev_child_start (EV_P_ struct ev_child *w)
783	{	1275	{
		1276	#if EV_MULTIPLICITY
		1277	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1278	#endif
784	if (ev_is_active (w))	1279	if (ev_is_active (w))
785	return;	1280	return;
786		1281
787	ev_start ((W)w, ++idlecnt);	1282	ev_start (EV_A_ (W)w, 1);
788	array_needsize (idles, idlemax, idlecnt, );	1283	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
789	idles [idlecnt - 1] = w;
790	}	1284	}
791		1285
792	void evidle_stop (struct ev_idle *w)	1286	void
		1287	ev_child_stop (EV_P_ struct ev_child *w)
793	{	1288	{
794	ev_clear ((W)w);	1289	ev_clear_pending (EV_A_ (W)w);
795	if (ev_is_active (w))	1290	if (ev_is_active (w))
796	return;	1291	return;
797		1292
798	idles [w->active - 1] = idles [--idlecnt];	1293	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
799	ev_stop ((W)w);	1294	ev_stop (EV_A_ (W)w);
800	}
801
802	void evcheck_start (struct ev_check *w)
803	{
804	if (ev_is_active (w))
805	return;
806
807	ev_start ((W)w, ++checkcnt);
808	array_needsize (checks, checkmax, checkcnt, );
809	checks [checkcnt - 1] = w;
810	}
811
812	void evcheck_stop (struct ev_check *w)
813	{
814	ev_clear ((W)w);
815	if (ev_is_active (w))
816	return;
817
818	checks [w->active - 1] = checks [--checkcnt];
819	ev_stop ((W)w);
820	}	1295	}
821		1296
822	/*****************************************************************************/	1297	/*****************************************************************************/
823		1298
824	struct ev_once	1299	struct ev_once
…		…
828	void (cb)(int revents, void arg);	1303	void (cb)(int revents, void arg);
829	void *arg;	1304	void *arg;
830	};	1305	};
831		1306
832	static void	1307	static void
833	once_cb (struct ev_once *once, int revents)	1308	once_cb (EV_P_ struct ev_once *once, int revents)
834	{	1309	{
835	void (cb)(int revents, void arg) = once->cb;	1310	void (cb)(int revents, void arg) = once->cb;
836	void *arg = once->arg;	1311	void *arg = once->arg;
837		1312
838	evio_stop (&once->io);	1313	ev_io_stop (EV_A_ &once->io);
839	evtimer_stop (&once->to);	1314	ev_timer_stop (EV_A_ &once->to);
840	free (once);	1315	free (once);
841		1316
842	cb (revents, arg);	1317	cb (revents, arg);
843	}	1318	}
844		1319
845	static void	1320	static void
846	once_cb_io (struct ev_io *w, int revents)	1321	once_cb_io (EV_P_ struct ev_io *w, int revents)
847	{	1322	{
848	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1323	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
849	}	1324	}
850		1325
851	static void	1326	static void
852	once_cb_to (struct ev_timer *w, int revents)	1327	once_cb_to (EV_P_ struct ev_timer *w, int revents)
853	{	1328	{
854	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1329	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
855	}	1330	}
856		1331
857	void	1332	void
858	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1333	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
859	{	1334	{
860	struct ev_once *once = malloc (sizeof (struct ev_once));	1335	struct ev_once *once = malloc (sizeof (struct ev_once));
861		1336
862	if (!once)	1337	if (!once)
863	cb (EV_ERROR, arg);	1338	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
864	else	1339	else
865	{	1340	{
866	once->cb = cb;	1341	once->cb = cb;
867	once->arg = arg;	1342	once->arg = arg;
868		1343
869	evw_init (&once->io, once_cb_io);	1344	ev_watcher_init (&once->io, once_cb_io);
870
871	if (fd >= 0)	1345	if (fd >= 0)
872	{	1346	{
873	evio_set (&once->io, fd, events);	1347	ev_io_set (&once->io, fd, events);
874	evio_start (&once->io);	1348	ev_io_start (EV_A_ &once->io);
875	}	1349	}
876		1350
877	evw_init (&once->to, once_cb_to);	1351	ev_watcher_init (&once->to, once_cb_to);
878
879	if (timeout >= 0.)	1352	if (timeout >= 0.)
880	{	1353	{
881	evtimer_set (&once->to, timeout, 0.);	1354	ev_timer_set (&once->to, timeout, 0.);
882	evtimer_start (&once->to);	1355	ev_timer_start (EV_A_ &once->to);
883	}	1356	}
884	}	1357	}
885	}	1358	}
886		1359
887	/*****************************************************************************/
888
889	#if 0
890
891	struct ev_io wio;
892
893	static void
894	sin_cb (struct ev_io *w, int revents)
895	{
896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
897	}
898
899	static void
900	ocb (struct ev_timer *w, int revents)
901	{
902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
903	evtimer_stop (w);
904	evtimer_start (w);
905	}
906
907	static void
908	scb (struct ev_signal *w, int revents)
909	{
910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
911	evio_stop (&wio);
912	evio_start (&wio);
913	}
914
915	static void
916	gcb (struct ev_signal *w, int revents)
917	{
918	fprintf (stderr, "generic %x\n", revents);
919
920	}
921
922	int main (void)
923	{
924	ev_init (0);
925
926	evio_init (&wio, sin_cb, 0, EV_READ);
927	evio_start (&wio);
928
929	struct ev_timer t[10000];
930
931	#if 0
932	int i;
933	for (i = 0; i < 10000; ++i)
934	{
935	struct ev_timer *w = t + i;
936	evw_init (w, ocb, i);
937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
938	evtimer_start (w);
939	if (drand48 () < 0.5)
940	evtimer_stop (w);
941	}
942	#endif
943
944	struct ev_timer t1;
945	evtimer_init (&t1, ocb, 5, 10);
946	evtimer_start (&t1);
947
948	struct ev_signal sig;
949	evsignal_init (&sig, scb, SIGQUIT);
950	evsignal_start (&sig);
951
952	struct ev_check cw;
953	evcheck_init (&cw, gcb);
954	evcheck_start (&cw);
955
956	struct ev_idle iw;
957	evidle_init (&iw, gcb);
958	evidle_start (&iw);
959
960	ev_loop (0);
961
962	return 0;
963	}
964
965	#endif
966
967
968
969

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Comparing libev/ev.c (file contents): Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs. Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC