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

Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.60 by root, Sun Nov 4 18:29:44 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
		75	/**/
		76
14	#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
15	# ifdef CLOCK_MONOTONIC	103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
16	# define HAVE_MONOTONIC 1	105	# define EV_USE_MONOTONIC 0
17	# endif	106	#endif
18	#endif
19		107
20	#ifndef HAVE_SELECT
21	# define HAVE_SELECT 1
22	#endif
23
24	#ifndef HAVE_EPOLL
25	# define HAVE_EPOLL 0
26	#endif
27
28	#ifndef HAVE_REALTIME	108	#ifndef CLOCK_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
30	#endif	111	#endif
		112
		113	/**/
31		114
32	#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) */
33	#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 */
34		119
35	#include "ev.h"	120	#include "ev.h"
36		121
37	struct ev_watcher {	122	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	123	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
40		129
41	struct ev_watcher_list {	130	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	131	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		135
45	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
		138	typedef struct ev_watcher_time *WT;
47		139
48	static ev_tstamp now, diff; /* monotonic clock */	140	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
49	ev_tstamp ev_now;
50	int ev_method;
51
52	static int have_monotonic; /* runtime */
53
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		141
58	/*****************************************************************************/	142	/*****************************************************************************/
59		143
60	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
61	ev_time (void)	178	ev_time (void)
62	{	179	{
63	#if HAVE_REALTIME	180	#if EV_USE_REALTIME
64	struct timespec ts;	181	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	183	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	184	#else
68	struct timeval tv;	185	struct timeval tv;
69	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	188	#endif
72	}	189	}
73		190
74	static ev_tstamp	191	inline ev_tstamp
75	get_clock (void)	192	get_clock (void)
76	{	193	{
77	#if HAVE_MONOTONIC	194	#if EV_USE_MONOTONIC
78	if (have_monotonic)	195	if (expect_true (have_monotonic))
79	{	196	{
80	struct timespec ts;	197	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	200	}
84	#endif	201	#endif
85		202
86	return ev_time ();	203	return ev_time ();
87	}	204	}
88		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
89	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
91	{ \	216	{ \
92	int newcnt = cur ? cur << 1 : 16; \	217	int newcnt = cur; \
93	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	\
94	base = realloc (base, sizeof (base) (newcnt)); \	224	base = realloc (base, sizeof (base) (newcnt)); \
95	init (base + cur, newcnt - cur); \	225	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	226	cur = newcnt; \
97	}	227	}
98		228
99	/*****************************************************************************/	229	/*****************************************************************************/
100		230
101	typedef struct
102	{
103	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	231	static void
114	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
115	{	233	{
116	while (count--)	234	while (count--)
117	{	235	{
118	base->head = 0;	236	base->head = 0;
119	base->wev = base->rev = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
120	++base;	240	++base;
121	}	241	}
122	}	242	}
123		243
124	typedef struct
125	{
126	W w;
127	int events;
128	} ANPENDING;
129
130	static ANPENDING *pendings;
131	static int pendingmax, pendingcnt;
132
133	static void	244	static void
134	event (W w, int events)	245	event (EV_P_ W w, int events)
135	{	246	{
		247	if (w->pending)
		248	{
		249	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		250	return;
		251	}
		252
136	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
138	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
140	}	257	}
141		258
142	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
143	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
144	{	270	{
145	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	272	struct ev_io *w;
147		273
148	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
149	{	275	{
150	int ev = w->events & events;	276	int ev = w->events & events;
151		277
152	if (ev)	278	if (ev)
153	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
154	}	280	}
155	}	281	}
156		282
		283	/*****************************************************************************/
		284
157	static void	285	static void
158	queue_events (W *events, int eventcnt, int type)	286	fd_reify (EV_P)
159	{	287	{
160	int i;	288	int i;
161		289
162	for (i = 0; i < eventcnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
163	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	}
164	}	378	}
165		379
166	/*****************************************************************************/	380	/*****************************************************************************/
167		381
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void	382	static void
175	upheap (struct ev_timer **timers, int k)	383	upheap (WT *heap, int k)
176	{	384	{
177	struct ev_timer *w = timers [k];	385	WT w = heap [k];
178		386
179	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
180	{	388	{
181	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
182	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
183	k >>= 1;	391	k >>= 1;
184	}	392	}
185		393
186	timers [k] = w;	394	heap [k] = w;
187	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
188		396
189	}	397	}
190		398
191	static void	399	static void
192	downheap (struct ev_timer **timers, int N, int k)	400	downheap (WT *heap, int N, int k)
193	{	401	{
194	struct ev_timer *w = timers [k];	402	WT w = heap [k];
195		403
196	while (k < (N >> 1))	404	while (k < (N >> 1))
197	{	405	{
198	int j = k << 1;	406	int j = k << 1;
199		407
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
201	++j;	409	++j;
202		410
203	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
204	break;	412	break;
205		413
206	timers [k] = timers [j];	414	heap [k] = heap [j];
207	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
208	k = j;	416	k = j;
209	}	417	}
210		418
211	timers [k] = w;	419	heap [k] = w;
212	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
213	}	421	}
214		422
215	/*****************************************************************************/	423	/*****************************************************************************/
216		424
217	typedef struct	425	typedef struct
218	{	426	{
219	struct ev_signal *head;	427	struct ev_watcher_list *head;
220	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
221	} ANSIG;	429	} ANSIG;
222		430
223	static ANSIG *signals;	431	static ANSIG *signals;
224	static int signalmax;	432	static int signalmax;
225		433
226	static int sigpipe [2];	434	static int sigpipe [2];
227	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	436	static struct ev_io sigev;
229		437
230	static void	438	static void
231	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
232	{	440	{
233	while (count--)	441	while (count--)
234	{	442	{
235	base->head = 0;	443	base->head = 0;
236	base->gotsig = 0;	444	base->gotsig = 0;
		445
237	++base;	446	++base;
238	}	447	}
239	}	448	}
240		449
241	static void	450	static void
243	{	452	{
244	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
245		454
246	if (!gotsig)	455	if (!gotsig)
247	{	456	{
		457	int old_errno = errno;
248	gotsig = 1;	458	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
250	}	461	}
251	}	462	}
252		463
253	static void	464	static void
254	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	466	{
256	struct ev_signal *w;	467	struct ev_watcher_list *w;
257	int sig;	468	int signum;
258		469
		470	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	471	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		472
262	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
264	{	475	{
265	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
266		477
267	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
269	}	480	}
270	}	481	}
271		482
272	static void	483	static void
273	siginit (void)	484	siginit (EV_P)
274	{	485	{
		486	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		489
278	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
281		494
282	evio_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
284	}	498	}
285		499
286	/*****************************************************************************/	500	/*****************************************************************************/
287		501
288	static struct ev_idle **idles;	502	#ifndef WIN32
289	static int idlemax, idlecnt;
290		503
291	static struct ev_check **checks;	504	static struct ev_child *childs [PID_HASHSIZE];
292	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
293		542
294	/*****************************************************************************/	543	/*****************************************************************************/
295		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
296	#if HAVE_EPOLL	548	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	549	# include "ev_epoll.c"
298	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
299	#if HAVE_SELECT	554	#if EV_USE_SELECT
300	# include "ev_select.c"	555	# include "ev_select.c"
301	#endif	556	#endif
302		557
303	int ev_init (int flags)	558	int
		559	ev_version_major (void)
304	{	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	{
305	#if HAVE_MONOTONIC	593	#if EV_USE_MONOTONIC
306	{	594	{
307	struct timespec ts;	595	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	597	have_monotonic = 1;
310	}	598	}
311	#endif	599	#endif
312		600
313	ev_now = ev_time ();	601	rt_now = ev_time ();
314	now = get_clock ();	602	mn_now = get_clock ();
315	diff = ev_now - now;	603	now_floor = mn_now;
		604	rtmn_diff = rt_now - mn_now;
316		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])
317	if (pipe (sigpipe))	702	if (pipe (sigpipe))
318	return 0;	703	return 0;
319		704
320	ev_method = EVMETHOD_NONE;	705	if (!default_loop)
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{	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	{
330	evw_init (&sigev, sigcb, 0);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
331	siginit ();	719	siginit (EV_A);
332	}
333		720
334	return ev_method;	721	#ifndef WIN32
335	}	722	ev_signal_init (&childev, childcb, SIGCHLD);
336		723	ev_set_priority (&childev, EV_MAXPRI);
337	/*****************************************************************************/	724	ev_signal_start (EV_A_ &childev);
338		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
339	void ev_prefork (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_parent (void)
345	{
346	/* nop */
347	}
348
349	void ev_postfork_child (void)
350	{
351	#if HAVE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();
354	#endif	726	#endif
		727	}
		728	else
		729	default_loop = 0;
		730	}
355		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 */
356	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);
357	close (sigpipe [0]);	764	close (sigpipe [0]);
358	close (sigpipe [1]);	765	close (sigpipe [1]);
359	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
360	siginit ();	769	siginit (EV_A);
361	}	770	}
362		771
363	/*****************************************************************************/	772	/*****************************************************************************/
364		773
365	static void	774	static void
366	fd_reify (void)	775	call_pending (EV_P)
367	{	776	{
368	int i;	777	int pri;
369		778
370	for (i = 0; i < fdchangecnt; ++i)	779	for (pri = NUMPRI; pri--; )
371	{	780	while (pendingcnt [pri])
372	int fd = fdchanges [i];
373	ANFD *anfd = anfds + fd;
374	struct ev_io *w;
375
376	int wev = 0;
377
378	for (w = anfd->head; w; w = w->next)
379	wev \|= w->events;
380
381	if (anfd->wev != wev)
382	{	781	{
383	method_modify (fd, anfd->wev, wev);	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
384	anfd->wev = wev;
385	}
386	}
387		783
388	fdchangecnt = 0;
389	}
390
391	static void
392	call_pending ()
393	{
394	int i;
395
396	for (i = 0; i < pendingcnt; ++i)
397	{
398	ANPENDING *p = pendings + i;
399
400	if (p->w)	784	if (p->w)
401	{	785	{
402	p->w->pending = 0;	786	p->w->pending = 0;
403	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
404	}	788	}
405	}	789	}
406
407	pendingcnt = 0;
408	}	790	}
409		791
410	static void	792	static void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	793	timers_reify (EV_P)
412	{	794	{
413	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
414	{	796	{
415	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
416		798
417	/* first reschedule or stop timer */	799	/* first reschedule or stop timer */
418	if (w->repeat)	800	if (w->repeat)
419	{	801	{
420	if (w->is_abs)	802	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
422	else
423	w->at = now + w->repeat;	803	w->at = mn_now + w->repeat;
424
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	804	downheap ((WT *)timers, timercnt, 0);
428	}	805	}
429	else	806	else
		807	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		808
		809	event (EV_A_ (W)w, EV_TIMEOUT);
		810	}
		811	}
		812
		813	static void
		814	periodics_reify (EV_P)
		815	{
		816	while (periodiccnt && periodics [0]->at <= rt_now)
		817	{
		818	struct ev_periodic *w = periodics [0];
		819
		820	/* first reschedule or stop timer */
		821	if (w->interval)
430	{	822	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	823	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
432	--timercnt; /* maybe pass by reference instead? */	824	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		825	downheap ((WT *)periodics, periodiccnt, 0);
433	}	826	}
		827	else
		828	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		829
435	event ((W)w, EV_TIMEOUT);	830	event (EV_A_ (W)w, EV_PERIODIC);
436	}	831	}
437	}	832	}
438		833
439	static void	834	static void
440	time_update ()	835	periodics_reschedule (EV_P)
441	{	836	{
442	int i;	837	int i;
443	ev_now = ev_time ();
444		838
445	if (have_monotonic)	839	/* adjust periodics after time jump */
		840	for (i = 0; i < periodiccnt; ++i)
446	{	841	{
447	ev_tstamp odiff = diff;	842	struct ev_periodic *w = periodics [i];
448		843
449	/* detecting time jumps is much more difficult */	844	if (w->interval)
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */
451	{	845	{
452	now = get_clock ();	846	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
453	diff = ev_now - now;
454		847
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	848	if (fabs (diff) >= 1e-4)
456	return; /* all is well */	849	{
		850	ev_periodic_stop (EV_A_ w);
		851	ev_periodic_start (EV_A_ w);
457		852
458	ev_now = ev_time ();	853	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		854	}
459	}	855	}
		856	}
		857	}
460		858
461	/* time jump detected, reschedule atimers */	859	inline int
462	for (i = 0; i < atimercnt; ++i)	860	time_update_monotonic (EV_P)
		861	{
		862	mn_now = get_clock ();
		863
		864	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		865	{
		866	rt_now = rtmn_diff + mn_now;
		867	return 0;
		868	}
		869	else
		870	{
		871	now_floor = mn_now;
		872	rt_now = ev_time ();
		873	return 1;
		874	}
		875	}
		876
		877	static void
		878	time_update (EV_P)
		879	{
		880	int i;
		881
		882	#if EV_USE_MONOTONIC
		883	if (expect_true (have_monotonic))
		884	{
		885	if (time_update_monotonic (EV_A))
463	{	886	{
464	struct ev_timer *w = atimers [i];	887	ev_tstamp odiff = rtmn_diff;
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	888
		889	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		890	{
		891	rtmn_diff = rt_now - mn_now;
		892
		893	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		894	return; /* all is well */
		895
		896	rt_now = ev_time ();
		897	mn_now = get_clock ();
		898	now_floor = mn_now;
		899	}
		900
		901	periodics_reschedule (EV_A);
		902	/* no timer adjustment, as the monotonic clock doesn't jump */
		903	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
466	}	904	}
467	}	905	}
468	else	906	else
		907	#endif
469	{	908	{
470	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	909	rt_now = ev_time ();
471	/* time jump detected, adjust rtimers */	910
		911	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		912	{
		913	periodics_reschedule (EV_A);
		914
		915	/* adjust timers. this is easy, as the offset is the same for all */
472	for (i = 0; i < rtimercnt; ++i)	916	for (i = 0; i < timercnt; ++i)
473	rtimers [i]->at += ev_now - now;	917	timers [i]->at += rt_now - mn_now;
		918	}
474		919
475	now = ev_now;	920	mn_now = rt_now;
476	}	921	}
477	}	922	}
478		923
479	int ev_loop_done;	924	void
		925	ev_ref (EV_P)
		926	{
		927	++activecnt;
		928	}
480		929
		930	void
		931	ev_unref (EV_P)
		932	{
		933	--activecnt;
		934	}
		935
		936	static int loop_done;
		937
		938	void
481	void ev_loop (int flags)	939	ev_loop (EV_P_ int flags)
482	{	940	{
483	double block;	941	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;	942	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
485
486	if (checkcnt)
487	{
488	queue_events ((W *)checks, checkcnt, EV_CHECK);
489	call_pending ();
490	}
491		943
492	do	944	do
493	{	945	{
		946	/* queue check watchers (and execute them) */
		947	if (expect_false (preparecnt))
		948	{
		949	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		950	call_pending (EV_A);
		951	}
		952
494	/* update fd-related kernel structures */	953	/* update fd-related kernel structures */
495	fd_reify ();	954	fd_reify (EV_A);
496		955
497	/* calculate blocking time */	956	/* calculate blocking time */
		957
		958	/* we only need this for !monotonic clockor timers, but as we basically
		959	always have timers, we just calculate it always */
		960	#if EV_USE_MONOTONIC
		961	if (expect_true (have_monotonic))
		962	time_update_monotonic (EV_A);
		963	else
		964	#endif
		965	{
		966	rt_now = ev_time ();
		967	mn_now = rt_now;
		968	}
		969
498	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	970	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
499	block = 0.;	971	block = 0.;
500	else	972	else
501	{	973	{
502	block = MAX_BLOCKTIME;	974	block = MAX_BLOCKTIME;
503		975
504	if (rtimercnt)	976	if (timercnt)
505	{	977	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	978	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
507	if (block > to) block = to;	979	if (block > to) block = to;
508	}	980	}
509		981
510	if (atimercnt)	982	if (periodiccnt)
511	{	983	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	984	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
513	if (block > to) block = to;	985	if (block > to) block = to;
514	}	986	}
515		987
516	if (block < 0.) block = 0.;	988	if (block < 0.) block = 0.;
517	}	989	}
518		990
519	method_poll (block);	991	method_poll (EV_A_ block);
520		992
521	/* update ev_now, do magic */	993	/* update rt_now, do magic */
522	time_update ();	994	time_update (EV_A);
523		995
524	/* queue pending timers and reschedule them */	996	/* queue pending timers and reschedule them */
525	/* absolute timers first */	997	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	998	periodics_reify (EV_A); /* absolute timers called first */
527	/* relative timers second */
528	timers_reify (rtimers, rtimercnt, now);
529		999
530	/* queue idle watchers unless io or timers are pending */	1000	/* queue idle watchers unless io or timers are pending */
531	if (!pendingcnt)	1001	if (!pendingcnt)
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	1002	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
533		1003
534	/* queue check and possibly idle watchers */	1004	/* queue check watchers, to be executed first */
		1005	if (checkcnt)
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	1006	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		1007
537	call_pending ();	1008	call_pending (EV_A);
538	}	1009	}
539	while (!ev_loop_done);	1010	while (activecnt && !loop_done);
		1011
		1012	if (loop_done != 2)
		1013	loop_done = 0;
		1014	}
		1015
		1016	void
		1017	ev_unloop (EV_P_ int how)
		1018	{
		1019	loop_done = how;
540	}	1020	}
541		1021
542	/*****************************************************************************/	1022	/*****************************************************************************/
543		1023
544	static void	1024	inline void
545	wlist_add (WL *head, WL elem)	1025	wlist_add (WL *head, WL elem)
546	{	1026	{
547	elem->next = *head;	1027	elem->next = *head;
548	*head = elem;	1028	*head = elem;
549	}	1029	}
550		1030
551	static void	1031	inline void
552	wlist_del (WL *head, WL elem)	1032	wlist_del (WL *head, WL elem)
553	{	1033	{
554	while (*head)	1034	while (*head)
555	{	1035	{
556	if (*head == elem)	1036	if (*head == elem)
…		…
561		1041
562	head = &(*head)->next;	1042	head = &(*head)->next;
563	}	1043	}
564	}	1044	}
565		1045
566	static void	1046	inline void
		1047	ev_clear_pending (EV_P_ W w)
		1048	{
		1049	if (w->pending)
		1050	{
		1051	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1052	w->pending = 0;
		1053	}
		1054	}
		1055
		1056	inline void
567	ev_start (W w, int active)	1057	ev_start (EV_P_ W w, int active)
568	{	1058	{
569	w->pending = 0;	1059	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1060	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1061
570	w->active = active;	1062	w->active = active;
		1063	ev_ref (EV_A);
571	}	1064	}
572		1065
573	static void	1066	inline void
574	ev_stop (W w)	1067	ev_stop (EV_P_ W w)
575	{	1068	{
576	if (w->pending)	1069	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	1070	w->active = 0;
580	}	1071	}
581		1072
582	/*****************************************************************************/	1073	/*****************************************************************************/
583		1074
584	void	1075	void
585	evio_start (struct ev_io *w)	1076	ev_io_start (EV_P_ struct ev_io *w)
586	{	1077	{
		1078	int fd = w->fd;
		1079
587	if (ev_is_active (w))	1080	if (ev_is_active (w))
588	return;	1081	return;
589		1082
590	int fd = w->fd;	1083	assert (("ev_io_start called with negative fd", fd >= 0));
591		1084
592	ev_start ((W)w, 1);	1085	ev_start (EV_A_ (W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1086	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1087	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595		1088
596	++fdchangecnt;	1089	fd_change (EV_A_ fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}	1090	}
600		1091
601	void	1092	void
602	evio_stop (struct ev_io *w)	1093	ev_io_stop (EV_P_ struct ev_io *w)
603	{	1094	{
		1095	ev_clear_pending (EV_A_ (W)w);
604	if (!ev_is_active (w))	1096	if (!ev_is_active (w))
605	return;	1097	return;
606		1098
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1099	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);	1100	ev_stop (EV_A_ (W)w);
609		1101
610	++fdchangecnt;	1102	fd_change (EV_A_ w->fd);
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}	1103	}
614		1104
615	void	1105	void
616	evtimer_start (struct ev_timer *w)	1106	ev_timer_start (EV_P_ struct ev_timer *w)
617	{	1107	{
618	if (ev_is_active (w))	1108	if (ev_is_active (w))
619	return;	1109	return;
620		1110
621	if (w->is_abs)	1111	w->at += mn_now;
		1112
		1113	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1114
		1115	ev_start (EV_A_ (W)w, ++timercnt);
		1116	array_needsize (timers, timermax, timercnt, );
		1117	timers [timercnt - 1] = w;
		1118	upheap ((WT *)timers, timercnt - 1);
		1119	}
		1120
		1121	void
		1122	ev_timer_stop (EV_P_ struct ev_timer *w)
		1123	{
		1124	ev_clear_pending (EV_A_ (W)w);
		1125	if (!ev_is_active (w))
		1126	return;
		1127
		1128	if (w->active < timercnt--)
		1129	{
		1130	timers [w->active - 1] = timers [timercnt];
		1131	downheap ((WT *)timers, timercnt, w->active - 1);
622	{	1132	}
623	/* this formula differs from the one in timer_reify becuse we do not round up */	1133
		1134	w->at = w->repeat;
		1135
		1136	ev_stop (EV_A_ (W)w);
		1137	}
		1138
		1139	void
		1140	ev_timer_again (EV_P_ struct ev_timer *w)
		1141	{
		1142	if (ev_is_active (w))
		1143	{
624	if (w->repeat)	1144	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1145	{
626		1146	w->at = mn_now + w->repeat;
627	ev_start ((W)w, ++atimercnt);	1147	downheap ((WT *)timers, timercnt, w->active - 1);
628	array_needsize (atimers, atimermax, atimercnt, );	1148	}
629	atimers [atimercnt - 1] = w;
630	upheap (atimers, atimercnt - 1);
631	}
632	else	1149	else
		1150	ev_timer_stop (EV_A_ w);
633	{	1151	}
634	w->at += now;	1152	else if (w->repeat)
635		1153	ev_timer_start (EV_A_ w);
636	ev_start ((W)w, ++rtimercnt);
637	array_needsize (rtimers, rtimermax, rtimercnt, );
638	rtimers [rtimercnt - 1] = w;
639	upheap (rtimers, rtimercnt - 1);
640	}
641
642	}	1154	}
643		1155
644	void	1156	void
645	evtimer_stop (struct ev_timer *w)	1157	ev_periodic_start (EV_P_ struct ev_periodic *w)
646	{	1158	{
		1159	if (ev_is_active (w))
		1160	return;
		1161
		1162	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1163
		1164	/* this formula differs from the one in periodic_reify because we do not always round up */
		1165	if (w->interval)
		1166	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1167
		1168	ev_start (EV_A_ (W)w, ++periodiccnt);
		1169	array_needsize (periodics, periodicmax, periodiccnt, );
		1170	periodics [periodiccnt - 1] = w;
		1171	upheap ((WT *)periodics, periodiccnt - 1);
		1172	}
		1173
		1174	void
		1175	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1176	{
		1177	ev_clear_pending (EV_A_ (W)w);
647	if (!ev_is_active (w))	1178	if (!ev_is_active (w))
648	return;	1179	return;
649		1180
650	if (w->is_abs)
651	{
652	if (w->active < atimercnt--)	1181	if (w->active < periodiccnt--)
653	{
654	atimers [w->active - 1] = atimers [atimercnt];
655	downheap (atimers, atimercnt, w->active - 1);
656	}
657	}	1182	{
658	else	1183	periodics [w->active - 1] = periodics [periodiccnt];
		1184	downheap ((WT *)periodics, periodiccnt, w->active - 1);
659	{	1185	}
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}
666		1186
667	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
668	}	1188	}
669		1189
670	void	1190	void
671	evsignal_start (struct ev_signal *w)	1191	ev_idle_start (EV_P_ struct ev_idle *w)
672	{	1192	{
673	if (ev_is_active (w))	1193	if (ev_is_active (w))
674	return;	1194	return;
675		1195
		1196	ev_start (EV_A_ (W)w, ++idlecnt);
		1197	array_needsize (idles, idlemax, idlecnt, );
		1198	idles [idlecnt - 1] = w;
		1199	}
		1200
		1201	void
		1202	ev_idle_stop (EV_P_ struct ev_idle *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	idles [w->active - 1] = idles [--idlecnt];
		1209	ev_stop (EV_A_ (W)w);
		1210	}
		1211
		1212	void
		1213	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1214	{
		1215	if (ev_is_active (w))
		1216	return;
		1217
		1218	ev_start (EV_A_ (W)w, ++preparecnt);
		1219	array_needsize (prepares, preparemax, preparecnt, );
		1220	prepares [preparecnt - 1] = w;
		1221	}
		1222
		1223	void
		1224	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1225	{
		1226	ev_clear_pending (EV_A_ (W)w);
		1227	if (ev_is_active (w))
		1228	return;
		1229
		1230	prepares [w->active - 1] = prepares [--preparecnt];
		1231	ev_stop (EV_A_ (W)w);
		1232	}
		1233
		1234	void
		1235	ev_check_start (EV_P_ struct ev_check *w)
		1236	{
		1237	if (ev_is_active (w))
		1238	return;
		1239
		1240	ev_start (EV_A_ (W)w, ++checkcnt);
		1241	array_needsize (checks, checkmax, checkcnt, );
		1242	checks [checkcnt - 1] = w;
		1243	}
		1244
		1245	void
		1246	ev_check_stop (EV_P_ struct ev_check *w)
		1247	{
		1248	ev_clear_pending (EV_A_ (W)w);
		1249	if (ev_is_active (w))
		1250	return;
		1251
		1252	checks [w->active - 1] = checks [--checkcnt];
		1253	ev_stop (EV_A_ (W)w);
		1254	}
		1255
		1256	#ifndef SA_RESTART
		1257	# define SA_RESTART 0
		1258	#endif
		1259
		1260	void
		1261	ev_signal_start (EV_P_ struct ev_signal *w)
		1262	{
		1263	#if EV_MULTIPLICITY
		1264	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1265	#endif
		1266	if (ev_is_active (w))
		1267	return;
		1268
		1269	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1270
676	ev_start ((W)w, 1);	1271	ev_start (EV_A_ (W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	1272	array_needsize (signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1273	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		1274
680	if (!w->next)	1275	if (!w->next)
681	{	1276	{
682	struct sigaction sa;	1277	struct sigaction sa;
683	sa.sa_handler = sighandler;	1278	sa.sa_handler = sighandler;
684	sigfillset (&sa.sa_mask);	1279	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	1280	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	1281	sigaction (w->signum, &sa, 0);
687	}	1282	}
688	}	1283	}
689		1284
690	void	1285	void
691	evsignal_stop (struct ev_signal *w)	1286	ev_signal_stop (EV_P_ struct ev_signal *w)
692	{	1287	{
		1288	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1289	if (!ev_is_active (w))
694	return;	1290	return;
695		1291
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1292	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
698		1294
699	if (!signals [w->signum - 1].head)	1295	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	1296	signal (w->signum, SIG_DFL);
701	}	1297	}
702		1298
703	void evidle_start (struct ev_idle *w)	1299	void
		1300	ev_child_start (EV_P_ struct ev_child *w)
704	{	1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
705	if (ev_is_active (w))	1305	if (ev_is_active (w))
706	return;	1306	return;
707		1307
708	ev_start ((W)w, ++idlecnt);	1308	ev_start (EV_A_ (W)w, 1);
709	array_needsize (idles, idlemax, idlecnt, );	1309	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
710	idles [idlecnt - 1] = w;
711	}	1310	}
712		1311
713	void evidle_stop (struct ev_idle *w)	1312	void
		1313	ev_child_stop (EV_P_ struct ev_child *w)
714	{	1314	{
715	idles [w->active - 1] = idles [--idlecnt];	1315	ev_clear_pending (EV_A_ (W)w);
716	ev_stop ((W)w);
717	}
718
719	void evcheck_start (struct ev_check *w)
720	{
721	if (ev_is_active (w))	1316	if (ev_is_active (w))
722	return;	1317	return;
723		1318
724	ev_start ((W)w, ++checkcnt);	1319	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
725	array_needsize (checks, checkmax, checkcnt, );
726	checks [checkcnt - 1] = w;
727	}
728
729	void evcheck_stop (struct ev_check *w)
730	{
731	checks [w->active - 1] = checks [--checkcnt];
732	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
733	}	1321	}
734		1322
735	/*****************************************************************************/	1323	/*****************************************************************************/
736		1324
737	#if 0	1325	struct ev_once
738
739	static void
740	sin_cb (struct ev_io *w, int revents)
741	{	1326	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
743	}
744
745	static void
746	ocb (struct ev_timer *w, int revents)
747	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
749	evtimer_stop (w);
750	evtimer_start (w);
751	}
752
753	static void
754	scb (struct ev_signal *w, int revents)
755	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
757	}
758
759	static void
760	gcb (struct ev_signal *w, int revents)
761	{
762	fprintf (stderr, "generic %x\n", revents);
763	}
764
765	int main (void)
766	{
767	struct ev_io sin;	1327	struct ev_io io;
768
769	ev_init (0);
770
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);
773	evio_start (&sin);
774
775	struct ev_timer t[10000];
776
777	#if 0
778	int i;
779	for (i = 0; i < 10000; ++i)
780	{
781	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);
784	evtimer_start (w);
785	if (drand48 () < 0.5)
786	evtimer_stop (w);
787	}
788	#endif
789
790	struct ev_timer t1;	1328	struct ev_timer to;
791	evw_init (&t1, ocb, 0);	1329	void (cb)(int revents, void arg);
792	evtimer_set_abs (&t1, 5, 10);	1330	void *arg;
793	evtimer_start (&t1);	1331	};
794		1332
795	struct ev_signal sig;	1333	static void
796	evw_init (&sig, scb, 65535);	1334	once_cb (EV_P_ struct ev_once *once, int revents)
797	evsignal_set (&sig, SIGQUIT);	1335	{
798	evsignal_start (&sig);	1336	void (cb)(int revents, void arg) = once->cb;
		1337	void *arg = once->arg;
799		1338
800	struct ev_check cw;	1339	ev_io_stop (EV_A_ &once->io);
801	evw_init (&cw, gcb, 0);	1340	ev_timer_stop (EV_A_ &once->to);
802	evcheck_start (&cw);	1341	free (once);
803		1342
804	struct ev_idle iw;	1343	cb (revents, arg);
805	evw_init (&iw, gcb, 0);
806	evidle_start (&iw);
807
808	ev_loop (0);
809
810	return 0;
811	}	1344	}
812		1345
813	#endif	1346	static void
		1347	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1348	{
		1349	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1350	}
814		1351
		1352	static void
		1353	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1354	{
		1355	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1356	}
815		1357
		1358	void
		1359	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1360	{
		1361	struct ev_once *once = malloc (sizeof (struct ev_once));
816		1362
		1363	if (!once)
		1364	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1365	else
		1366	{
		1367	once->cb = cb;
		1368	once->arg = arg;
817		1369
		1370	ev_watcher_init (&once->io, once_cb_io);
		1371	if (fd >= 0)
		1372	{
		1373	ev_io_set (&once->io, fd, events);
		1374	ev_io_start (EV_A_ &once->io);
		1375	}
		1376
		1377	ev_watcher_init (&once->to, once_cb_to);
		1378	if (timeout >= 0.)
		1379	{
		1380	ev_timer_set (&once->to, timeout, 0.);
		1381	ev_timer_start (EV_A_ &once->to);
		1382	}
		1383	}
		1384	}
		1385

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Comparing libev/ev.c (file contents): Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs. Revision 1.60 by root, Sun Nov 4 18:29:44 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.60 by root, Sun Nov 4 18:29:44 2007 UTC