[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 1.61 by root, Sun Nov 4 19:45:09 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>	59	#include <unistd.h>
4	#include <fcntl.h>	60	#include <fcntl.h>
5	#include <signal.h>	61	#include <signal.h>
		62	#include <stddef.h>
6		63
7	#include <stdio.h>	64	#include <stdio.h>
8		65
9	#include <assert.h>	66	#include <assert.h>
10	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
11	#include <sys/time.h>	72	#include <sys/time.h>
12	#include <time.h>	73	#include <time.h>
13		74
14	#define HAVE_EPOLL 1	75	/**/
15		76
16	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
		78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_REALTIME
		98	# define EV_USE_REALTIME 1
		99	#endif
		100
		101	/**/
		102
17	# ifdef CLOCK_MONOTONIC	103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
18	# define HAVE_MONOTONIC 1	105	# define EV_USE_MONOTONIC 0
19	# endif	106	#endif
20	#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 CLOCK_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
32	#endif	111	#endif
		112
		113	/**/
33		114
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	116	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		117	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		118	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
36		119
37	#include "ev.h"	120	#include "ev.h"
38		121
39	struct ev_watcher {	122	#if __GNUC__ >= 3
40	EV_WATCHER (ev_watcher);	123	# define expect(expr,value) __builtin_expect ((expr),(value))
41	};	124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
42		129
43	struct ev_watcher_list {	130	#define expect_false(expr) expect ((expr) != 0, 0)
44	EV_WATCHER_LIST (ev_watcher_list);	131	#define expect_true(expr) expect ((expr) != 0, 1)
45	};
46		132
47	struct ev_watcher_time {	133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48	EV_WATCHER_TIME (ev_watcher_time);	134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49	};
50		135
51	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
52	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
53	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
54		139
55	static ev_tstamp now, diff; /* monotonic clock */	140	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
56	ev_tstamp ev_now;
57	int ev_method;
58
59	static int have_monotonic; /* runtime */
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		141
65	/*****************************************************************************/	142	/*****************************************************************************/
66		143
67	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
68	ev_time (void)	178	ev_time (void)
69	{	179	{
70	#if HAVE_REALTIME	180	#if EV_USE_REALTIME
71	struct timespec ts;	181	struct timespec ts;
72	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
73	return ts.tv_sec + ts.tv_nsec * 1e-9;	183	return ts.tv_sec + ts.tv_nsec * 1e-9;
74	#else	184	#else
75	struct timeval tv;	185	struct timeval tv;
76	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
77	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
78	#endif	188	#endif
79	}	189	}
80		190
81	static ev_tstamp	191	inline ev_tstamp
82	get_clock (void)	192	get_clock (void)
83	{	193	{
84	#if HAVE_MONOTONIC	194	#if EV_USE_MONOTONIC
85	if (have_monotonic)	195	if (expect_true (have_monotonic))
86	{	196	{
87	struct timespec ts;	197	struct timespec ts;
88	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	}	200	}
91	#endif	201	#endif
92		202
93	return ev_time ();	203	return ev_time ();
94	}	204	}
95		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
		212	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		213
96	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
97	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
98	{ \	216	{ \
99	int newcnt = cur ? cur << 1 : 16; \	217	int newcnt = cur; \
100	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	218	do \
		219	{ \
		220	newcnt = array_roundsize (base, newcnt << 1); \
		221	} \
		222	while ((cnt) > newcnt); \
		223	\
101	base = realloc (base, sizeof (base) (newcnt)); \	224	base = realloc (base, sizeof (base) (newcnt)); \
102	init (base + cur, newcnt - cur); \	225	init (base + cur, newcnt - cur); \
103	cur = newcnt; \	226	cur = newcnt; \
104	}	227	}
105		228
106	/*****************************************************************************/	229	/*****************************************************************************/
107		230
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	231	static void
121	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
122	{	233	{
123	while (count--)	234	while (count--)
124	{	235	{
125	base->head = 0;	236	base->head = 0;
126	base->wev = base->rev = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
127	++base;	240	++base;
128	}	241	}
129	}	242	}
130		243
131	typedef struct
132	{
133	W w;
134	int events;
135	} ANPENDING;
136
137	static ANPENDING *pendings;
138	static int pendingmax, pendingcnt;
139
140	static void	244	static void
141	event (W w, int events)	245	event (EV_P_ W w, int events)
142	{	246	{
		247	if (w->pending)
		248	{
		249	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		250	return;
		251	}
		252
143	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
144	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
145	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
146	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
147	}	257	}
148		258
149	static void	259	static void
		260	queue_events (EV_P_ W *events, int eventcnt, int type)
		261	{
		262	int i;
		263
		264	for (i = 0; i < eventcnt; ++i)
		265	event (EV_A_ events [i], type);
		266	}
		267
		268	static void
150	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
151	{	270	{
152	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
153	struct ev_io *w;	272	struct ev_io *w;
154		273
155	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
156	{	275	{
157	int ev = w->events & events;	276	int ev = w->events & events;
158		277
159	if (ev)	278	if (ev)
160	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
161	}	280	}
162	}	281	}
163		282
		283	/*****************************************************************************/
		284
164	static void	285	static void
165	queue_events (W *events, int eventcnt, int type)	286	fd_reify (EV_P)
166	{	287	{
167	int i;	288	int i;
168		289
169	for (i = 0; i < eventcnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
170	event (events [i], type);	291	{
		292	int fd = fdchanges [i];
		293	ANFD *anfd = anfds + fd;
		294	struct ev_io *w;
		295
		296	int events = 0;
		297
		298	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		299	events \|= w->events;
		300
		301	anfd->reify = 0;
		302
		303	if (anfd->events != events)
		304	{
		305	method_modify (EV_A_ fd, anfd->events, events);
		306	anfd->events = events;
		307	}
		308	}
		309
		310	fdchangecnt = 0;
		311	}
		312
		313	static void
		314	fd_change (EV_P_ int fd)
		315	{
		316	if (anfds [fd].reify \|\| fdchangecnt < 0)
		317	return;
		318
		319	anfds [fd].reify = 1;
		320
		321	++fdchangecnt;
		322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		323	fdchanges [fdchangecnt - 1] = fd;
		324	}
		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		335	}
		336	}
		337
		338	/* called on EBADF to verify fds */
		339	static void
		340	fd_ebadf (EV_P)
		341	{
		342	int fd;
		343
		344	for (fd = 0; fd < anfdmax; ++fd)
		345	if (anfds [fd].events)
		346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
		358	{
		359	close (fd);
		360	fd_kill (EV_A_ fd);
		361	return;
		362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
171	}	378	}
172		379
173	/*****************************************************************************/	380	/*****************************************************************************/
174		381
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	382	static void
182	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
183	{	384	{
184	WT w = timers [k];	385	WT w = heap [k];
185		386
186	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
187	{	388	{
188	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
189	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
190	k >>= 1;	391	k >>= 1;
191	}	392	}
192		393
193	timers [k] = w;	394	heap [k] = w;
194	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
195		396
196	}	397	}
197		398
198	static void	399	static void
199	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
200	{	401	{
201	WT w = timers [k];	402	WT w = heap [k];
202		403
203	while (k < (N >> 1))	404	while (k < (N >> 1))
204	{	405	{
205	int j = k << 1;	406	int j = k << 1;
206		407
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208	++j;	409	++j;
209		410
210	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
211	break;	412	break;
212		413
213	timers [k] = timers [j];	414	heap [k] = heap [j];
214	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
215	k = j;	416	k = j;
216	}	417	}
217		418
218	timers [k] = w;	419	heap [k] = w;
219	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
220	}	421	}
221		422
222	/*****************************************************************************/	423	/*****************************************************************************/
223		424
224	typedef struct	425	typedef struct
225	{	426	{
226	struct ev_signal *head;	427	struct ev_watcher_list *head;
227	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
228	} ANSIG;	429	} ANSIG;
229		430
230	static ANSIG *signals;	431	static ANSIG *signals;
231	static int signalmax;	432	static int signalmax;
232		433
233	static int sigpipe [2];	434	static int sigpipe [2];
234	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
235	static struct ev_io sigev;	436	static struct ev_io sigev;
236		437
237	static void	438	static void
238	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
239	{	440	{
240	while (count--)	441	while (count--)
241	{	442	{
242	base->head = 0;	443	base->head = 0;
243	base->gotsig = 0;	444	base->gotsig = 0;
		445
244	++base;	446	++base;
245	}	447	}
246	}	448	}
247		449
248	static void	450	static void
250	{	452	{
251	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
252		454
253	if (!gotsig)	455	if (!gotsig)
254	{	456	{
		457	int old_errno = errno;
255	gotsig = 1;	458	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
257	}	461	}
258	}	462	}
259		463
260	static void	464	static void
261	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	466	{
263	struct ev_signal *w;	467	struct ev_watcher_list *w;
264	int sig;	468	int signum;
265		469
		470	read (sigpipe [0], &revents, 1);
266	gotsig = 0;	471	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		472
269	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
271	{	475	{
272	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
273		477
274	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
276	}	480	}
277	}	481	}
278		482
279	static void	483	static void
280	siginit (void)	484	siginit (EV_P)
281	{	485	{
		486	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		489
285	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
288		494
289	evio_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	498	}
292		499
293	/*****************************************************************************/	500	/*****************************************************************************/
294		501
295	static struct ev_idle **idles;	502	#ifndef WIN32
296	static int idlemax, idlecnt;
297		503
298	static struct ev_check **checks;	504	static struct ev_child *childs [PID_HASHSIZE];
299	static int checkmax, checkcnt;	505	static struct ev_signal childev;
		506
		507	#ifndef WCONTINUED
		508	# define WCONTINUED 0
		509	#endif
		510
		511	static void
		512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		513	{
		514	struct ev_child *w;
		515
		516	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		517	if (w->pid == pid \|\| !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it now */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
		529	int pid, status;
		530
		531	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		532	{
		533	/* make sure we are called again until all childs have been reaped */
		534	event (EV_A_ (W)sw, EV_SIGNAL);
		535
		536	child_reap (EV_A_ sw, pid, pid, status);
		537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
		539	}
		540
		541	#endif
300		542
301	/*****************************************************************************/	543	/*****************************************************************************/
302		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
303	#if HAVE_EPOLL	548	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	549	# include "ev_epoll.c"
305	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
306	#if HAVE_SELECT	554	#if EV_USE_SELECT
307	# include "ev_select.c"	555	# include "ev_select.c"
308	#endif	556	#endif
309		557
310	int ev_init (int flags)	558	int
		559	ev_version_major (void)
311	{	560	{
		561	return EV_VERSION_MAJOR;
		562	}
		563
		564	int
		565	ev_version_minor (void)
		566	{
		567	return EV_VERSION_MINOR;
		568	}
		569
		570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
		573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	\|\| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
		591	if (!method)
		592	{
312	#if HAVE_MONOTONIC	593	#if EV_USE_MONOTONIC
313	{	594	{
314	struct timespec ts;	595	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	597	have_monotonic = 1;
317	}	598	}
318	#endif	599	#endif
319		600
320	ev_now = ev_time ();	601	rt_now = ev_time ();
321	now = get_clock ();	602	mn_now = get_clock ();
322	diff = ev_now - now;	603	now_floor = mn_now;
		604	rtmn_diff = rt_now - mn_now;
323		605
		606	if (methods == EVMETHOD_AUTO)
		607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
		610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
		616	#if EV_USE_EPOLL
		617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		621	#endif
		622	#if EV_USE_SELECT
		623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		624	#endif
		625	}
		626	}
		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/TODO/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/TODO/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
324	if (pipe (sigpipe))	702	if (pipe (sigpipe))
325	return 0;	703	return 0;
326		704
327	ev_method = EVMETHOD_NONE;	705	if (!default_loop)
328	#if HAVE_EPOLL
329	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
330	#endif
331	#if HAVE_SELECT
332	if (ev_method == EVMETHOD_NONE) select_init (flags);
333	#endif
334
335	if (ev_method)
336	{	706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
		715	if (ev_method (EV_A))
		716	{
337	evw_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
338	siginit ();	719	siginit (EV_A);
339	}
340		720
341	return ev_method;	721	#ifndef WIN32
342	}	722	ev_signal_init (&childev, childcb, SIGCHLD);
343		723	ev_set_priority (&childev, EV_MAXPRI);
344	/*****************************************************************************/	724	ev_signal_start (EV_A_ &childev);
345		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
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	726	#endif
		727	}
		728	else
		729	default_loop = 0;
		730	}
362		731
		732	return default_loop;
		733	}
		734
		735	void
		736	ev_default_destroy (void)
		737	{
		738	#if EV_MULTIPLICITY
		739	struct ev_loop *loop = default_loop;
		740	#endif
		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
363	evio_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
364	close (sigpipe [0]);	764	close (sigpipe [0]);
365	close (sigpipe [1]);	765	close (sigpipe [1]);
366	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
367	siginit ();	769	siginit (EV_A);
368	}	770	}
369		771
370	/*****************************************************************************/	772	/*****************************************************************************/
371		773
372	static void	774	static void
373	fd_reify (void)	775	call_pending (EV_P)
374	{	776	{
375	int i;	777	int pri;
376		778
377	for (i = 0; i < fdchangecnt; ++i)	779	for (pri = NUMPRI; pri--; )
378	{	780	while (pendingcnt [pri])
379	int fd = fdchanges [i];
380	ANFD *anfd = anfds + fd;
381	struct ev_io *w;
382
383	int wev = 0;
384
385	for (w = anfd->head; w; w = w->next)
386	wev \|= w->events;
387
388	if (anfd->wev != wev)
389	{	781	{
390	method_modify (fd, anfd->wev, wev);	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391	anfd->wev = wev;
392	}
393	}
394		783
395	fdchangecnt = 0;
396	}
397
398	static void
399	call_pending ()
400	{
401	int i;
402
403	for (i = 0; i < pendingcnt; ++i)
404	{
405	ANPENDING *p = pendings + i;
406
407	if (p->w)	784	if (p->w)
408	{	785	{
409	p->w->pending = 0;	786	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
411	}	788	}
412	}	789	}
413
414	pendingcnt = 0;
415	}	790	}
416		791
417	static void	792	static void
418	timers_reify ()	793	timers_reify (EV_P)
419	{	794	{
420	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
421	{	796	{
422	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
		798
		799	assert (("inactive timer on timer heap detected", ev_is_active (w)));
423		800
424	/* first reschedule or stop timer */	801	/* first reschedule or stop timer */
425	if (w->repeat)	802	if (w->repeat)
426	{	803	{
		804	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	805	w->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	806	downheap ((WT *)timers, timercnt, 0);
430	}	807	}
431	else	808	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	809	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		810
434	event ((W)w, EV_TIMEOUT);	811	event (EV_A_ (W)w, EV_TIMEOUT);
435	}	812	}
436	}	813	}
437		814
438	static void	815	static void
439	periodics_reify ()	816	periodics_reify (EV_P)
440	{	817	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	818	while (periodiccnt && periodics [0]->at <= rt_now)
442	{	819	{
443	struct ev_periodic *w = periodics [0];	820	struct ev_periodic *w = periodics [0];
		821
		822	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
444		823
445	/* first reschedule or stop timer */	824	/* first reschedule or stop timer */
446	if (w->interval)	825	if (w->interval)
447	{	826	{
448	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	827	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
449	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	828	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
450	downheap ((WT *)periodics, periodiccnt, 0);	829	downheap ((WT *)periodics, periodiccnt, 0);
451	}	830	}
452	else	831	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	832	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		833
455	event ((W)w, EV_TIMEOUT);	834	event (EV_A_ (W)w, EV_PERIODIC);
456	}	835	}
457	}	836	}
458		837
459	static void	838	static void
460	time_jump (ev_tstamp diff)	839	periodics_reschedule (EV_P)
461	{	840	{
462	int i;	841	int i;
463		842
464	/* adjust periodics */	843	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	844	for (i = 0; i < periodiccnt; ++i)
466	{	845	{
467	struct ev_periodic *w = periodics [i];	846	struct ev_periodic *w = periodics [i];
468		847
469	if (w->interval)	848	if (w->interval)
470	{	849	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	850	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
472		851
473	if (fabs (diff) >= 1e-4)	852	if (fabs (diff) >= 1e-4)
474	{	853	{
475	evperiodic_stop (w);	854	ev_periodic_stop (EV_A_ w);
476	evperiodic_start (w);	855	ev_periodic_start (EV_A_ w);
477		856
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */	857	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	858	}
480	}	859	}
481	}	860	}
482
483	/* adjust timers. this is easy, as the offset is the same for all */
484	for (i = 0; i < timercnt; ++i)
485	timers [i]->at += diff;
486	}	861	}
487		862
		863	inline int
		864	time_update_monotonic (EV_P)
		865	{
		866	mn_now = get_clock ();
		867
		868	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		869	{
		870	rt_now = rtmn_diff + mn_now;
		871	return 0;
		872	}
		873	else
		874	{
		875	now_floor = mn_now;
		876	rt_now = ev_time ();
		877	return 1;
		878	}
		879	}
		880
488	static void	881	static void
489	time_update ()	882	time_update (EV_P)
490	{	883	{
491	int i;	884	int i;
492		885
493	ev_now = ev_time ();	886	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	887	if (expect_true (have_monotonic))
496	{	888	{
497	ev_tstamp odiff = diff;	889	if (time_update_monotonic (EV_A))
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	890	{
501	now = get_clock ();	891	ev_tstamp odiff = rtmn_diff;
		892
		893	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		894	{
502	diff = ev_now - now;	895	rtmn_diff = rt_now - mn_now;
503		896
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	897	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	898	return; /* all is well */
506		899
507	ev_now = ev_time ();	900	rt_now = ev_time ();
		901	mn_now = get_clock ();
		902	now_floor = mn_now;
		903	}
		904
		905	periodics_reschedule (EV_A);
		906	/* no timer adjustment, as the monotonic clock doesn't jump */
		907	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
508	}	908	}
509
510	time_jump (diff - odiff);
511	}	909	}
512	else	910	else
		911	#endif
513	{	912	{
514	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	913	rt_now = ev_time ();
515	time_jump (ev_now - now);
516		914
		915	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		916	{
		917	periodics_reschedule (EV_A);
		918
		919	/* adjust timers. this is easy, as the offset is the same for all */
		920	for (i = 0; i < timercnt; ++i)
		921	timers [i]->at += rt_now - mn_now;
		922	}
		923
517	now = ev_now;	924	mn_now = rt_now;
518	}	925	}
519	}	926	}
520		927
521	int ev_loop_done;	928	void
		929	ev_ref (EV_P)
		930	{
		931	++activecnt;
		932	}
522		933
		934	void
		935	ev_unref (EV_P)
		936	{
		937	--activecnt;
		938	}
		939
		940	static int loop_done;
		941
		942	void
523	void ev_loop (int flags)	943	ev_loop (EV_P_ int flags)
524	{	944	{
525	double block;	945	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	946	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		947
534	do	948	do
535	{	949	{
		950	/* queue check watchers (and execute them) */
		951	if (expect_false (preparecnt))
		952	{
		953	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		954	call_pending (EV_A);
		955	}
		956
536	/* update fd-related kernel structures */	957	/* update fd-related kernel structures */
537	fd_reify ();	958	fd_reify (EV_A);
538		959
539	/* calculate blocking time */	960	/* calculate blocking time */
540		961
541	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	962	/* we only need this for !monotonic clockor timers, but as we basically
		963	always have timers, we just calculate it always */
		964	#if EV_USE_MONOTONIC
		965	if (expect_true (have_monotonic))
		966	time_update_monotonic (EV_A);
		967	else
		968	#endif
		969	{
542	ev_now = ev_time ();	970	rt_now = ev_time ();
		971	mn_now = rt_now;
		972	}
543		973
544	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	974	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
545	block = 0.;	975	block = 0.;
546	else	976	else
547	{	977	{
548	block = MAX_BLOCKTIME;	978	block = MAX_BLOCKTIME;
549		979
550	if (timercnt)	980	if (timercnt)
551	{	981	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	982	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
553	if (block > to) block = to;	983	if (block > to) block = to;
554	}	984	}
555		985
556	if (periodiccnt)	986	if (periodiccnt)
557	{	987	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	988	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
559	if (block > to) block = to;	989	if (block > to) block = to;
560	}	990	}
561		991
562	if (block < 0.) block = 0.;	992	if (block < 0.) block = 0.;
563	}	993	}
564		994
565	method_poll (block);	995	method_poll (EV_A_ block);
566		996
567	/* update ev_now, do magic */	997	/* update rt_now, do magic */
568	time_update ();	998	time_update (EV_A);
569		999
570	/* queue pending timers and reschedule them */	1000	/* queue pending timers and reschedule them */
		1001	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	1002	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		1003
574	/* queue idle watchers unless io or timers are pending */	1004	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	1005	if (!pendingcnt)
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	1006	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		1007
578	/* queue check and possibly idle watchers */	1008	/* queue check watchers, to be executed first */
		1009	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	1010	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		1011
581	call_pending ();	1012	call_pending (EV_A);
582	}	1013	}
583	while (!ev_loop_done);	1014	while (activecnt && !loop_done);
		1015
		1016	if (loop_done != 2)
		1017	loop_done = 0;
		1018	}
		1019
		1020	void
		1021	ev_unloop (EV_P_ int how)
		1022	{
		1023	loop_done = how;
584	}	1024	}
585		1025
586	/*****************************************************************************/	1026	/*****************************************************************************/
587		1027
588	static void	1028	inline void
589	wlist_add (WL *head, WL elem)	1029	wlist_add (WL *head, WL elem)
590	{	1030	{
591	elem->next = *head;	1031	elem->next = *head;
592	*head = elem;	1032	*head = elem;
593	}	1033	}
594		1034
595	static void	1035	inline void
596	wlist_del (WL *head, WL elem)	1036	wlist_del (WL *head, WL elem)
597	{	1037	{
598	while (*head)	1038	while (*head)
599	{	1039	{
600	if (*head == elem)	1040	if (*head == elem)
…		…
605		1045
606	head = &(*head)->next;	1046	head = &(*head)->next;
607	}	1047	}
608	}	1048	}
609		1049
610	static void	1050	inline void
		1051	ev_clear_pending (EV_P_ W w)
		1052	{
		1053	if (w->pending)
		1054	{
		1055	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1056	w->pending = 0;
		1057	}
		1058	}
		1059
		1060	inline void
611	ev_start (W w, int active)	1061	ev_start (EV_P_ W w, int active)
612	{	1062	{
613	w->pending = 0;	1063	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1064	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1065
614	w->active = active;	1066	w->active = active;
		1067	ev_ref (EV_A);
615	}	1068	}
616		1069
617	static void	1070	inline void
618	ev_stop (W w)	1071	ev_stop (EV_P_ W w)
619	{	1072	{
620	if (w->pending)	1073	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1074	w->active = 0;
624	}	1075	}
625		1076
626	/*****************************************************************************/	1077	/*****************************************************************************/
627		1078
628	void	1079	void
629	evio_start (struct ev_io *w)	1080	ev_io_start (EV_P_ struct ev_io *w)
630	{	1081	{
		1082	int fd = w->fd;
		1083
631	if (ev_is_active (w))	1084	if (ev_is_active (w))
632	return;	1085	return;
633		1086
634	int fd = w->fd;	1087	assert (("ev_io_start called with negative fd", fd >= 0));
635		1088
636	ev_start ((W)w, 1);	1089	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1090	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1091	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		1092
640	++fdchangecnt;	1093	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	1094	}
644		1095
645	void	1096	void
646	evio_stop (struct ev_io *w)	1097	ev_io_stop (EV_P_ struct ev_io *w)
647	{	1098	{
		1099	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	1100	if (!ev_is_active (w))
649	return;	1101	return;
650		1102
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1103	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
653		1105
654	++fdchangecnt;	1106	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1107	}
658		1108
659
660	void	1109	void
661	evtimer_start (struct ev_timer *w)	1110	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1111	{
663	if (ev_is_active (w))	1112	if (ev_is_active (w))
664	return;	1113	return;
665		1114
666	w->at += now;	1115	w->at += mn_now;
667		1116
		1117	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1118
668	ev_start ((W)w, ++timercnt);	1119	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1120	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;	1121	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1122	upheap ((WT *)timers, timercnt - 1);
672	}	1123	}
673		1124
674	void	1125	void
675	evtimer_stop (struct ev_timer *w)	1126	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1127	{
		1128	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
678	return;	1130	return;
679		1131
680	if (w->active < timercnt--)	1132	if (w->active < timercnt--)
681	{	1133	{
682	timers [w->active - 1] = timers [timercnt];	1134	timers [w->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1135	downheap ((WT *)timers, timercnt, w->active - 1);
684	}	1136	}
685		1137
		1138	w->at = w->repeat;
		1139
686	ev_stop ((W)w);	1140	ev_stop (EV_A_ (W)w);
687	}	1141	}
688		1142
689	void	1143	void
690	evperiodic_start (struct ev_periodic *w)	1144	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1145	{
692	if (ev_is_active (w))	1146	if (ev_is_active (w))
		1147	{
		1148	if (w->repeat)
		1149	{
		1150	w->at = mn_now + w->repeat;
		1151	downheap ((WT *)timers, timercnt, w->active - 1);
		1152	}
		1153	else
		1154	ev_timer_stop (EV_A_ w);
		1155	}
		1156	else if (w->repeat)
		1157	ev_timer_start (EV_A_ w);
		1158	}
		1159
		1160	void
		1161	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1162	{
		1163	if (ev_is_active (w))
693	return;	1164	return;
		1165
		1166	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694		1167
695	/* this formula differs from the one in periodic_reify because we do not always round up */	1168	/* this formula differs from the one in periodic_reify because we do not always round up */
696	if (w->interval)	1169	if (w->interval)
697	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1170	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
698		1171
699	ev_start ((W)w, ++periodiccnt);	1172	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1173	array_needsize (periodics, periodicmax, periodiccnt, );
701	periodics [periodiccnt - 1] = w;	1174	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1175	upheap ((WT *)periodics, periodiccnt - 1);
703	}	1176	}
704		1177
705	void	1178	void
706	evperiodic_stop (struct ev_periodic *w)	1179	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1180	{
		1181	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1182	if (!ev_is_active (w))
709	return;	1183	return;
710		1184
711	if (w->active < periodiccnt--)	1185	if (w->active < periodiccnt--)
712	{	1186	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1187	periodics [w->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1188	downheap ((WT *)periodics, periodiccnt, w->active - 1);
715	}	1189	}
716		1190
717	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
718	}	1192	}
719		1193
720	void	1194	void
721	evsignal_start (struct ev_signal *w)	1195	ev_idle_start (EV_P_ struct ev_idle *w)
722	{	1196	{
723	if (ev_is_active (w))	1197	if (ev_is_active (w))
724	return;	1198	return;
725		1199
		1200	ev_start (EV_A_ (W)w, ++idlecnt);
		1201	array_needsize (idles, idlemax, idlecnt, );
		1202	idles [idlecnt - 1] = w;
		1203	}
		1204
		1205	void
		1206	ev_idle_stop (EV_P_ struct ev_idle *w)
		1207	{
		1208	ev_clear_pending (EV_A_ (W)w);
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	idles [w->active - 1] = idles [--idlecnt];
		1213	ev_stop (EV_A_ (W)w);
		1214	}
		1215
		1216	void
		1217	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1218	{
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	ev_start (EV_A_ (W)w, ++preparecnt);
		1223	array_needsize (prepares, preparemax, preparecnt, );
		1224	prepares [preparecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	prepares [w->active - 1] = prepares [--preparecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_check_start (EV_P_ struct ev_check *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++checkcnt);
		1245	array_needsize (checks, checkmax, checkcnt, );
		1246	checks [checkcnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_check_stop (EV_P_ struct ev_check *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	checks [w->active - 1] = checks [--checkcnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	#ifndef SA_RESTART
		1261	# define SA_RESTART 0
		1262	#endif
		1263
		1264	void
		1265	ev_signal_start (EV_P_ struct ev_signal *w)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1269	#endif
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1274
726	ev_start ((W)w, 1);	1275	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1276	array_needsize (signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1277	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1278
730	if (!w->next)	1279	if (!w->next)
731	{	1280	{
732	struct sigaction sa;	1281	struct sigaction sa;
733	sa.sa_handler = sighandler;	1282	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1283	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1284	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1285	sigaction (w->signum, &sa, 0);
737	}	1286	}
738	}	1287	}
739		1288
740	void	1289	void
741	evsignal_stop (struct ev_signal *w)	1290	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1291	{
		1292	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1293	if (!ev_is_active (w))
744	return;	1294	return;
745		1295
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1296	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1297	ev_stop (EV_A_ (W)w);
748		1298
749	if (!signals [w->signum - 1].head)	1299	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1300	signal (w->signum, SIG_DFL);
751	}	1301	}
752		1302
753	void evidle_start (struct ev_idle *w)	1303	void
		1304	ev_child_start (EV_P_ struct ev_child *w)
754	{	1305	{
		1306	#if EV_MULTIPLICITY
		1307	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1308	#endif
755	if (ev_is_active (w))	1309	if (ev_is_active (w))
756	return;	1310	return;
757		1311
758	ev_start ((W)w, ++idlecnt);	1312	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	1313	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	1314	}
762		1315
763	void evidle_stop (struct ev_idle *w)	1316	void
		1317	ev_child_stop (EV_P_ struct ev_child *w)
764	{	1318	{
765	idles [w->active - 1] = idles [--idlecnt];	1319	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))	1320	if (ev_is_active (w))
772	return;	1321	return;
773		1322
774	ev_start ((W)w, ++checkcnt);	1323	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);	1324	ev_stop (EV_A_ (W)w);
783	}	1325	}
784		1326
785	/*****************************************************************************/	1327	/*****************************************************************************/
786		1328
787	#if 1	1329	struct ev_once
788		1330	{
789	struct ev_io wio;	1331	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;	1332	struct ev_timer to;
843	evtimer_init (&t1, ocb, 5, 10);	1333	void (cb)(int revents, void arg);
844	evtimer_start (&t1);	1334	void *arg;
		1335	};
845		1336
846	struct ev_signal sig;	1337	static void
847	evsignal_init (&sig, scb, SIGQUIT);	1338	once_cb (EV_P_ struct ev_once *once, int revents)
848	evsignal_start (&sig);	1339	{
		1340	void (cb)(int revents, void arg) = once->cb;
		1341	void *arg = once->arg;
849		1342
850	struct ev_check cw;	1343	ev_io_stop (EV_A_ &once->io);
851	evcheck_init (&cw, gcb);	1344	ev_timer_stop (EV_A_ &once->to);
852	evcheck_start (&cw);	1345	free (once);
853		1346
854	struct ev_idle iw;	1347	cb (revents, arg);
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;
861	}	1348	}
862		1349
863	#endif	1350	static void
		1351	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1352	{
		1353	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1354	}
864		1355
		1356	static void
		1357	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1358	{
		1359	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1360	}
865		1361
		1362	void
		1363	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1364	{
		1365	struct ev_once *once = malloc (sizeof (struct ev_once));
866		1366
		1367	if (!once)
		1368	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1369	else
		1370	{
		1371	once->cb = cb;
		1372	once->arg = arg;
867		1373
		1374	ev_watcher_init (&once->io, once_cb_io);
		1375	if (fd >= 0)
		1376	{
		1377	ev_io_set (&once->io, fd, events);
		1378	ev_io_start (EV_A_ &once->io);
		1379	}
		1380
		1381	ev_watcher_init (&once->to, once_cb_to);
		1382	if (timeout >= 0.)
		1383	{
		1384	ev_timer_set (&once->to, timeout, 0.);
		1385	ev_timer_start (EV_A_ &once->to);
		1386	}
		1387	}
		1388	}
		1389

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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 1.61 by root, Sun Nov 4 19:45:09 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC