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

Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 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
17	# ifdef CLOCK_MONOTONIC
18	# define HAVE_MONOTONIC 1	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_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
19	# endif	102	# endif
20	#endif	103	#endif
21		104
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	105	#ifndef EV_USE_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
32	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
33		122
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
36		127
37	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
38		143
39	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
42		147
43	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
44	ev_tstamp ev_now;
45	int ev_method;
46
47	static int have_monotonic; /* runtime */
48
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		149
53	/*****************************************************************************/	150	/*****************************************************************************/
54		151
55	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
56	ev_time (void)	186	ev_time (void)
57	{	187	{
58	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
59	struct timespec ts;	189	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	192	#else
63	struct timeval tv;	193	struct timeval tv;
64	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	196	#endif
67	}	197	}
68		198
69	static ev_tstamp	199	inline ev_tstamp
70	get_clock (void)	200	get_clock (void)
71	{	201	{
72	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
73	if (have_monotonic)	203	if (expect_true (have_monotonic))
74	{	204	{
75	struct timespec ts;	205	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	208	}
79	#endif	209	#endif
80		210
81	return ev_time ();	211	return ev_time ();
82	}	212	}
83		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		221
84	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
85	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
86	{ \	224	{ \
87	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	226	do \
		227	{ \
		228	newcnt = array_roundsize (base, newcnt << 1); \
		229	} \
		230	while ((cnt) > newcnt); \
		231	\
89	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
90	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	234	cur = newcnt; \
92	}	235	}
93		236
94	/*****************************************************************************/	237	/*****************************************************************************/
95		238
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	239	static void
109	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
110	{	241	{
111	while (count--)	242	while (count--)
112	{	243	{
113	base->head = 0;	244	base->head = 0;
114	base->wev = base->rev = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
115	++base;	248	++base;
116	}	249	}
117	}	250	}
118		251
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void	252	static void
129	event (W w, int events)	253	event (EV_P_ W w, int events)
130	{	254	{
		255	if (w->pending)
		256	{
		257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		258	return;
		259	}
		260
131	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
132	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
133	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
134	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
135	}	265	}
136		266
137	static void	267	static void
		268	queue_events (EV_P_ W *events, int eventcnt, int type)
		269	{
		270	int i;
		271
		272	for (i = 0; i < eventcnt; ++i)
		273	event (EV_A_ events [i], type);
		274	}
		275
		276	static void
138	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
139	{	278	{
140	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
141	struct ev_io *w;	280	struct ev_io *w;
142		281
143	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
144	{	283	{
145	int ev = w->events & events;	284	int ev = w->events & events;
146		285
147	if (ev)	286	if (ev)
148	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
149	}	288	}
150	}	289	}
151		290
		291	/*****************************************************************************/
		292
152	static void	293	static void
153	queue_events (W *events, int eventcnt, int type)	294	fd_reify (EV_P)
154	{	295	{
155	int i;	296	int i;
156		297
157	for (i = 0; i < eventcnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
158	event (events [i], type);	299	{
		300	int fd = fdchanges [i];
		301	ANFD *anfd = anfds + fd;
		302	struct ev_io *w;
		303
		304	int events = 0;
		305
		306	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		307	events \|= w->events;
		308
		309	anfd->reify = 0;
		310
		311	method_modify (EV_A_ fd, anfd->events, events);
		312	anfd->events = events;
		313	}
		314
		315	fdchangecnt = 0;
		316	}
		317
		318	static void
		319	fd_change (EV_P_ int fd)
		320	{
		321	if (anfds [fd].reify \|\| fdchangecnt < 0)
		322	return;
		323
		324	anfds [fd].reify = 1;
		325
		326	++fdchangecnt;
		327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		328	fdchanges [fdchangecnt - 1] = fd;
		329	}
		330
		331	static void
		332	fd_kill (EV_P_ int fd)
		333	{
		334	struct ev_io *w;
		335
		336	while ((w = (struct ev_io *)anfds [fd].head))
		337	{
		338	ev_io_stop (EV_A_ w);
		339	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		340	}
		341	}
		342
		343	/* called on EBADF to verify fds */
		344	static void
		345	fd_ebadf (EV_P)
		346	{
		347	int fd;
		348
		349	for (fd = 0; fd < anfdmax; ++fd)
		350	if (anfds [fd].events)
		351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		352	fd_kill (EV_A_ fd);
		353	}
		354
		355	/* called on ENOMEM in select/poll to kill some fds and retry */
		356	static void
		357	fd_enomem (EV_P)
		358	{
		359	int fd;
		360
		361	for (fd = anfdmax; fd--; )
		362	if (anfds [fd].events)
		363	{
		364	close (fd);
		365	fd_kill (EV_A_ fd);
		366	return;
		367	}
		368	}
		369
		370	/* susually called after fork if method needs to re-arm all fds from scratch */
		371	static void
		372	fd_rearm_all (EV_P)
		373	{
		374	int fd;
		375
		376	/* this should be highly optimised to not do anything but set a flag */
		377	for (fd = 0; fd < anfdmax; ++fd)
		378	if (anfds [fd].events)
		379	{
		380	anfds [fd].events = 0;
		381	fd_change (EV_A_ fd);
		382	}
159	}	383	}
160		384
161	/*****************************************************************************/	385	/*****************************************************************************/
162		386
163	static struct ev_timer **timers;
164	static int timermax, timercnt;
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void	387	static void
170	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
171	{	389	{
172	WT w = timers [k];	390	WT w = heap [k];
173		391
174	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
175	{	393	{
176	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
177	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
178	k >>= 1;	396	k >>= 1;
179	}	397	}
180		398
181	timers [k] = w;	399	heap [k] = w;
182	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
183		401
184	}	402	}
185		403
186	static void	404	static void
187	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
188	{	406	{
189	WT w = timers [k];	407	WT w = heap [k];
190		408
191	while (k < (N >> 1))	409	while (k < (N >> 1))
192	{	410	{
193	int j = k << 1;	411	int j = k << 1;
194		412
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
196	++j;	414	++j;
197		415
198	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
199	break;	417	break;
200		418
201	timers [k] = timers [j];	419	heap [k] = heap [j];
202	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
203	k = j;	421	k = j;
204	}	422	}
205		423
206	timers [k] = w;	424	heap [k] = w;
207	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
208	}	426	}
209		427
210	/*****************************************************************************/	428	/*****************************************************************************/
211		429
212	typedef struct	430	typedef struct
213	{	431	{
214	struct ev_signal *head;	432	struct ev_watcher_list *head;
215	sig_atomic_t gotsig;	433	sig_atomic_t volatile gotsig;
216	} ANSIG;	434	} ANSIG;
217		435
218	static ANSIG *signals;	436	static ANSIG *signals;
219	static int signalmax;	437	static int signalmax;
220		438
221	static int sigpipe [2];	439	static int sigpipe [2];
222	static sig_atomic_t gotsig;	440	static sig_atomic_t volatile gotsig;
223	static struct ev_io sigev;	441	static struct ev_io sigev;
224		442
225	static void	443	static void
226	signals_init (ANSIG *base, int count)	444	signals_init (ANSIG *base, int count)
227	{	445	{
228	while (count--)	446	while (count--)
229	{	447	{
230	base->head = 0;	448	base->head = 0;
231	base->gotsig = 0;	449	base->gotsig = 0;
		450
232	++base;	451	++base;
233	}	452	}
234	}	453	}
235		454
236	static void	455	static void
238	{	457	{
239	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
240		459
241	if (!gotsig)	460	if (!gotsig)
242	{	461	{
		462	int old_errno = errno;
243	gotsig = 1;	463	gotsig = 1;
244	write (sigpipe [1], &gotsig, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
245	}	466	}
246	}	467	}
247		468
248	static void	469	static void
249	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
250	{	471	{
251	struct ev_signal *w;	472	struct ev_watcher_list *w;
252	int sig;	473	int signum;
253		474
		475	read (sigpipe [0], &revents, 1);
254	gotsig = 0;	476	gotsig = 0;
255	read (sigpipe [0], &revents, 1);
256		477
257	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
258	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
259	{	480	{
260	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
261		482
262	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
263	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
264	}	485	}
265	}	486	}
266		487
267	static void	488	static void
268	siginit (void)	489	siginit (EV_P)
269	{	490	{
		491	#ifndef WIN32
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272		494
273	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
276		499
277	evio_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
278	evio_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
279	}	503	}
280		504
281	/*****************************************************************************/	505	/*****************************************************************************/
282		506
283	static struct ev_idle **idles;	507	#ifndef WIN32
284	static int idlemax, idlecnt;
285		508
286	static struct ev_check **checks;	509	static struct ev_child *childs [PID_HASHSIZE];
287	static int checkmax, checkcnt;	510	static struct ev_signal childev;
		511
		512	#ifndef WCONTINUED
		513	# define WCONTINUED 0
		514	#endif
		515
		516	static void
		517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		518	{
		519	struct ev_child *w;
		520
		521	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		522	if (w->pid == pid \|\| !w->pid)
		523	{
		524	ev_priority (w) = ev_priority (sw); /* need to do it now */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
		534	int pid, status;
		535
		536	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		537	{
		538	/* make sure we are called again until all childs have been reaped */
		539	event (EV_A_ (W)sw, EV_SIGNAL);
		540
		541	child_reap (EV_A_ sw, pid, pid, status);
		542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
		544	}
		545
		546	#endif
288		547
289	/*****************************************************************************/	548	/*****************************************************************************/
290		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
291	#if HAVE_EPOLL	553	#if EV_USE_EPOLL
292	# include "ev_epoll.c"	554	# include "ev_epoll.c"
293	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
294	#if HAVE_SELECT	559	#if EV_USE_SELECT
295	# include "ev_select.c"	560	# include "ev_select.c"
296	#endif	561	#endif
297		562
298	int ev_init (int flags)	563	int
		564	ev_version_major (void)
299	{	565	{
		566	return EV_VERSION_MAJOR;
		567	}
		568
		569	int
		570	ev_version_minor (void)
		571	{
		572	return EV_VERSION_MINOR;
		573	}
		574
		575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
		578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	\|\| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	static void
		594	loop_init (EV_P_ int methods)
		595	{
		596	if (!method)
		597	{
300	#if HAVE_MONOTONIC	598	#if EV_USE_MONOTONIC
301	{	599	{
302	struct timespec ts;	600	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;	602	have_monotonic = 1;
305	}	603	}
306	#endif	604	#endif
307		605
308	ev_now = ev_time ();	606	rt_now = ev_time ();
309	now = get_clock ();	607	mn_now = get_clock ();
310	diff = ev_now - now;	608	now_floor = mn_now;
		609	rtmn_diff = rt_now - mn_now;
311		610
		611	if (methods == EVMETHOD_AUTO)
		612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
		615	methods = EVMETHOD_ANY;
		616
		617	method = 0;
		618	#if EV_USE_WIN32
		619	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		620	#endif
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_EPOLL
		625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_SELECT
		631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		632	#endif
		633	}
		634	}
		635
		636	void
		637	loop_destroy (EV_P)
		638	{
		639	#if EV_USE_WIN32
		640	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		647	#endif
		648	#if EV_USE_POLL
		649	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		653	#endif
		654
		655	method = 0;
		656	/TODO/
		657	}
		658
		659	void
		660	loop_fork (EV_P)
		661	{
		662	/TODO/
		663	#if EV_USE_EPOLL
		664	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		665	#endif
		666	#if EV_USE_KQUEUE
		667	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		668	#endif
		669	}
		670
		671	#if EV_MULTIPLICITY
		672	struct ev_loop *
		673	ev_loop_new (int methods)
		674	{
		675	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		676
		677	loop_init (EV_A_ methods);
		678
		679	if (ev_method (EV_A))
		680	return loop;
		681
		682	return 0;
		683	}
		684
		685	void
		686	ev_loop_destroy (EV_P)
		687	{
		688	loop_destroy (EV_A);
		689	free (loop);
		690	}
		691
		692	void
		693	ev_loop_fork (EV_P)
		694	{
		695	loop_fork (EV_A);
		696	}
		697
		698	#endif
		699
		700	#if EV_MULTIPLICITY
		701	struct ev_loop default_loop_struct;
		702	static struct ev_loop *default_loop;
		703
		704	struct ev_loop *
		705	#else
		706	static int default_loop;
		707
		708	int
		709	#endif
		710	ev_default_loop (int methods)
		711	{
		712	if (sigpipe [0] == sigpipe [1])
312	if (pipe (sigpipe))	713	if (pipe (sigpipe))
313	return 0;	714	return 0;
314		715
315	ev_method = EVMETHOD_NONE;	716	if (!default_loop)
316	#if HAVE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322
323	if (ev_method)
324	{	717	{
		718	#if EV_MULTIPLICITY
		719	struct ev_loop *loop = default_loop = &default_loop_struct;
		720	#else
		721	default_loop = 1;
		722	#endif
		723
		724	loop_init (EV_A_ methods);
		725
		726	if (ev_method (EV_A))
		727	{
325	evw_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
326	siginit ();	730	siginit (EV_A);
327	}
328		731
329	return ev_method;	732	#ifndef WIN32
330	}	733	ev_signal_init (&childev, childcb, SIGCHLD);
331		734	ev_set_priority (&childev, EV_MAXPRI);
332	/*****************************************************************************/	735	ev_signal_start (EV_A_ &childev);
333		736	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	void ev_prefork (void)
335	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif	737	#endif
		738	}
		739	else
		740	default_loop = 0;
		741	}
350		742
		743	return default_loop;
		744	}
		745
		746	void
		747	ev_default_destroy (void)
		748	{
		749	#if EV_MULTIPLICITY
		750	struct ev_loop *loop = default_loop;
		751	#endif
		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
351	evio_stop (&sigev);	757	ev_io_stop (EV_A_ &sigev);
		758
		759	close (sigpipe [0]); sigpipe [0] = 0;
		760	close (sigpipe [1]); sigpipe [1] = 0;
		761
		762	loop_destroy (EV_A);
		763	}
		764
		765	void
		766	ev_default_fork (void)
		767	{
		768	#if EV_MULTIPLICITY
		769	struct ev_loop *loop = default_loop;
		770	#endif
		771
		772	loop_fork (EV_A);
		773
		774	ev_io_stop (EV_A_ &sigev);
352	close (sigpipe [0]);	775	close (sigpipe [0]);
353	close (sigpipe [1]);	776	close (sigpipe [1]);
354	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
355	siginit ();	780	siginit (EV_A);
356	}	781	}
357		782
358	/*****************************************************************************/	783	/*****************************************************************************/
359		784
360	static void	785	static void
361	fd_reify (void)	786	call_pending (EV_P)
362	{	787	{
363	int i;	788	int pri;
364		789
365	for (i = 0; i < fdchangecnt; ++i)	790	for (pri = NUMPRI; pri--; )
366	{	791	while (pendingcnt [pri])
367	int fd = fdchanges [i];
368	ANFD *anfd = anfds + fd;
369	struct ev_io *w;
370
371	int wev = 0;
372
373	for (w = anfd->head; w; w = w->next)
374	wev \|= w->events;
375
376	if (anfd->wev != wev)
377	{	792	{
378	method_modify (fd, anfd->wev, wev);	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
379	anfd->wev = wev;
380	}
381	}
382		794
383	fdchangecnt = 0;
384	}
385
386	static void
387	call_pending ()
388	{
389	int i;
390
391	for (i = 0; i < pendingcnt; ++i)
392	{
393	ANPENDING *p = pendings + i;
394
395	if (p->w)	795	if (p->w)
396	{	796	{
397	p->w->pending = 0;	797	p->w->pending = 0;
398	p->w->cb (p->w, p->events);	798
		799	((void (*)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
399	}	800	}
400	}	801	}
401
402	pendingcnt = 0;
403	}	802	}
404		803
405	static void	804	static void
406	timers_reify ()	805	timers_reify (EV_P)
407	{	806	{
408	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	808	{
410	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
		810
		811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
411		812
412	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
413	if (w->repeat)	814	if (w->repeat)
414	{	815	{
		816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
415	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
416	assert (("timer timeout in the past, negative repeat?", w->at > now));
417	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
418	}	819	}
419	else	820	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		822
422	event ((W)w, EV_TIMEOUT);	823	event (EV_A_ (W)w, EV_TIMEOUT);
423	}	824	}
424	}	825	}
425		826
426	static void	827	static void
427	periodics_reify ()	828	periodics_reify (EV_P)
428	{	829	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
430	{	831	{
431	struct ev_periodic *w = periodics [0];	832	struct ev_periodic *w = periodics [0];
		833
		834	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
432		835
433	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
434	if (w->interval)	837	if (w->interval)
435	{	838	{
436	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	839	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
437	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	840	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
438	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
439	}	842	}
440	else	843	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		845
443	event ((W)w, EV_TIMEOUT);	846	event (EV_A_ (W)w, EV_PERIODIC);
444	}	847	}
445	}	848	}
446		849
447	static void	850	static void
448	periodics_reschedule (ev_tstamp diff)	851	periodics_reschedule (EV_P)
449	{	852	{
450	int i;	853	int i;
451		854
452	/* adjust periodics after time jump */	855	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
454	{	857	{
455	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
456		859
457	if (w->interval)	860	if (w->interval)
458	{	861	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	862	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
460		863
461	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
462	{	865	{
463	evperiodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
464	evperiodic_start (w);	867	ev_periodic_start (EV_A_ w);
465		868
466	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
467	}	870	}
468	}	871	}
469	}	872	}
470	}	873	}
471		874
		875	inline int
		876	time_update_monotonic (EV_P)
		877	{
		878	mn_now = get_clock ();
		879
		880	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		881	{
		882	rt_now = rtmn_diff + mn_now;
		883	return 0;
		884	}
		885	else
		886	{
		887	now_floor = mn_now;
		888	rt_now = ev_time ();
		889	return 1;
		890	}
		891	}
		892
472	static void	893	static void
473	time_update ()	894	time_update (EV_P)
474	{	895	{
475	int i;	896	int i;
476		897
477	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
478
479	if (have_monotonic)	899	if (expect_true (have_monotonic))
480	{	900	{
481	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
482
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */
484	{	902	{
485	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
486	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
487		908
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
489	return; /* all is well */	910	return; /* all is well */
490		911
491	ev_now = ev_time ();	912	rt_now = ev_time ();
		913	mn_now = get_clock ();
		914	now_floor = mn_now;
		915	}
		916
		917	periodics_reschedule (EV_A);
		918	/* no timer adjustment, as the monotonic clock doesn't jump */
		919	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
492	}	920	}
493
494	periodics_reschedule (diff - odiff);
495	/* no timer adjustment, as the monotonic clock doesn't jump */
496	}	921	}
497	else	922	else
		923	#endif
498	{	924	{
499	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	925	rt_now = ev_time ();
		926
		927	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
500	{	928	{
501	periodics_reschedule (ev_now - now);	929	periodics_reschedule (EV_A);
502		930
503	/* adjust timers. this is easy, as the offset is the same for all */	931	/* adjust timers. this is easy, as the offset is the same for all */
504	for (i = 0; i < timercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	933	((WT)timers [i])->at += rt_now - mn_now;
506	}	934	}
507		935
508	now = ev_now;	936	mn_now = rt_now;
509	}	937	}
510	}	938	}
511		939
512	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
513		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
514	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
515	{	956	{
516	double block;	957	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	958	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
518
519	if (checkcnt)
520	{
521	queue_events ((W *)checks, checkcnt, EV_CHECK);
522	call_pending ();
523	}
524		959
525	do	960	do
526	{	961	{
		962	/* queue check watchers (and execute them) */
		963	if (expect_false (preparecnt))
		964	{
		965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		966	call_pending (EV_A);
		967	}
		968
527	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
528	fd_reify ();	970	fd_reify (EV_A);
529		971
530	/* calculate blocking time */	972	/* calculate blocking time */
531		973
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	974	/* we only need this for !monotonic clockor timers, but as we basically
		975	always have timers, we just calculate it always */
		976	#if EV_USE_MONOTONIC
		977	if (expect_true (have_monotonic))
		978	time_update_monotonic (EV_A);
		979	else
		980	#endif
		981	{
533	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
534		985
535	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	986	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
536	block = 0.;	987	block = 0.;
537	else	988	else
538	{	989	{
539	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
540		991
541	if (timercnt)	992	if (timercnt)
542	{	993	{
543	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	994	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
544	if (block > to) block = to;	995	if (block > to) block = to;
545	}	996	}
546		997
547	if (periodiccnt)	998	if (periodiccnt)
548	{	999	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
550	if (block > to) block = to;	1001	if (block > to) block = to;
551	}	1002	}
552		1003
553	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
554	}	1005	}
555		1006
556	method_poll (block);	1007	method_poll (EV_A_ block);
557		1008
558	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
559	time_update ();	1010	time_update (EV_A);
560		1011
561	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
		1013	timers_reify (EV_A); /* relative timers called last */
562	periodics_reify (); /* absolute timers first */	1014	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */
564		1015
565	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
566	if (!pendingcnt)	1017	if (!pendingcnt)
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
568		1019
569	/* queue check and possibly idle watchers */	1020	/* queue check watchers, to be executed first */
		1021	if (checkcnt)
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1023
572	call_pending ();	1024	call_pending (EV_A);
573	}	1025	}
574	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
575		1027
576	if (ev_loop_done != 2)	1028	if (loop_done != 2)
577	ev_loop_done = 0;	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
578	}	1036	}
579		1037
580	/*****************************************************************************/	1038	/*****************************************************************************/
581		1039
582	static void	1040	inline void
583	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
584	{	1042	{
585	elem->next = *head;	1043	elem->next = *head;
586	*head = elem;	1044	*head = elem;
587	}	1045	}
588		1046
589	static void	1047	inline void
590	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
591	{	1049	{
592	while (*head)	1050	while (*head)
593	{	1051	{
594	if (*head == elem)	1052	if (*head == elem)
…		…
599		1057
600	head = &(*head)->next;	1058	head = &(*head)->next;
601	}	1059	}
602	}	1060	}
603		1061
604	static void	1062	inline void
		1063	ev_clear_pending (EV_P_ W w)
		1064	{
		1065	if (w->pending)
		1066	{
		1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1068	w->pending = 0;
		1069	}
		1070	}
		1071
		1072	inline void
605	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
606	{	1074	{
607	w->pending = 0;	1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
608	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
609	}	1080	}
610		1081
611	static void	1082	inline void
612	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
613	{	1084	{
614	if (w->pending)	1085	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1086	w->active = 0;
618	}	1087	}
619		1088
620	/*****************************************************************************/	1089	/*****************************************************************************/
621		1090
622	void	1091	void
623	evio_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
624	{	1093	{
		1094	int fd = w->fd;
		1095
625	if (ev_is_active (w))	1096	if (ev_is_active (w))
626	return;	1097	return;
627		1098
628	int fd = w->fd;	1099	assert (("ev_io_start called with negative fd", fd >= 0));
629		1100
630	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633		1104
634	++fdchangecnt;	1105	fd_change (EV_A_ fd);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1106	}
638		1107
639	void	1108	void
640	evio_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
641	{	1110	{
		1111	ev_clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
643	return;	1113	return;
644		1114
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
647		1117
648	++fdchangecnt;	1118	fd_change (EV_A_ w->fd);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1119	}
652		1120
653
654	void	1121	void
655	evtimer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
656	{	1123	{
657	if (ev_is_active (w))	1124	if (ev_is_active (w))
658	return;	1125	return;
659		1126
660	w->at += now;	1127	((WT)w)->at += mn_now;
661		1128
662	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1129	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
663		1130
664	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
666	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
668	}
669		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
670	void	1139	void
671	evtimer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
672	{	1141	{
		1142	ev_clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
674	return;	1144	return;
675		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
676	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
677	{	1149	{
678	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
680	}	1152	}
681		1153
		1154	((WT)w)->at = w->repeat;
		1155
682	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
683	}	1157	}
684		1158
685	void	1159	void
686	evperiodic_start (struct ev_periodic *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
687	{	1161	{
688	if (ev_is_active (w))	1162	if (ev_is_active (w))
689	return;	1163	{
		1164	if (w->repeat)
		1165	{
		1166	((WT)w)->at = mn_now + w->repeat;
		1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1168	}
		1169	else
		1170	ev_timer_stop (EV_A_ w);
		1171	}
		1172	else if (w->repeat)
		1173	ev_timer_start (EV_A_ w);
		1174	}
690		1175
691	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1176	void
		1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1178	{
		1179	if (ev_is_active (w))
		1180	return;
		1181
		1182	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
692		1183
693	/* this formula differs from the one in periodic_reify because we do not always round up */	1184	/* this formula differs from the one in periodic_reify because we do not always round up */
694	if (w->interval)	1185	if (w->interval)
695	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1186	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
696		1187
697	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
698	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
699	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
700	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
701	}
702		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
703	void	1196	void
704	evperiodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
705	{	1198	{
		1199	ev_clear_pending (EV_A_ (W)w);
706	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
707	return;	1201	return;
708		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
709	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
710	{	1206	{
711	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
712	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
713	}	1209	}
714		1210
715	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
716	}	1212	}
717		1213
718	void	1214	void
719	evsignal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
720	{	1216	{
721	if (ev_is_active (w))	1217	if (ev_is_active (w))
722	return;	1218	return;
723		1219
		1220	ev_start (EV_A_ (W)w, ++idlecnt);
		1221	array_needsize (idles, idlemax, idlecnt, );
		1222	idles [idlecnt - 1] = w;
		1223	}
		1224
		1225	void
		1226	ev_idle_stop (EV_P_ struct ev_idle *w)
		1227	{
		1228	ev_clear_pending (EV_A_ (W)w);
		1229	if (ev_is_active (w))
		1230	return;
		1231
		1232	idles [((W)w)->active - 1] = idles [--idlecnt];
		1233	ev_stop (EV_A_ (W)w);
		1234	}
		1235
		1236	void
		1237	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1238	{
		1239	if (ev_is_active (w))
		1240	return;
		1241
		1242	ev_start (EV_A_ (W)w, ++preparecnt);
		1243	array_needsize (prepares, preparemax, preparecnt, );
		1244	prepares [preparecnt - 1] = w;
		1245	}
		1246
		1247	void
		1248	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1249	{
		1250	ev_clear_pending (EV_A_ (W)w);
		1251	if (ev_is_active (w))
		1252	return;
		1253
		1254	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1255	ev_stop (EV_A_ (W)w);
		1256	}
		1257
		1258	void
		1259	ev_check_start (EV_P_ struct ev_check *w)
		1260	{
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	ev_start (EV_A_ (W)w, ++checkcnt);
		1265	array_needsize (checks, checkmax, checkcnt, );
		1266	checks [checkcnt - 1] = w;
		1267	}
		1268
		1269	void
		1270	ev_check_stop (EV_P_ struct ev_check *w)
		1271	{
		1272	ev_clear_pending (EV_A_ (W)w);
		1273	if (ev_is_active (w))
		1274	return;
		1275
		1276	checks [((W)w)->active - 1] = checks [--checkcnt];
		1277	ev_stop (EV_A_ (W)w);
		1278	}
		1279
		1280	#ifndef SA_RESTART
		1281	# define SA_RESTART 0
		1282	#endif
		1283
		1284	void
		1285	ev_signal_start (EV_P_ struct ev_signal *w)
		1286	{
		1287	#if EV_MULTIPLICITY
		1288	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1289	#endif
		1290	if (ev_is_active (w))
		1291	return;
		1292
		1293	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1294
724	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
725	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
726	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
727		1298
728	if (!w->next)	1299	if (!((WL)w)->next)
729	{	1300	{
730	struct sigaction sa;	1301	struct sigaction sa;
731	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
732	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
733	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
734	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
735	}	1306	}
736	}	1307	}
737		1308
738	void	1309	void
739	evsignal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
740	{	1311	{
		1312	ev_clear_pending (EV_A_ (W)w);
741	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
742	return;	1314	return;
743		1315
744	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
745	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
746		1318
747	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
748	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
749	}	1321	}
750		1322
751	void evidle_start (struct ev_idle *w)	1323	void
		1324	ev_child_start (EV_P_ struct ev_child *w)
752	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
753	if (ev_is_active (w))	1329	if (ev_is_active (w))
754	return;	1330	return;
755		1331
756	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
757	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
758	idles [idlecnt - 1] = w;
759	}	1334	}
760		1335
761	void evidle_stop (struct ev_idle *w)	1336	void
		1337	ev_child_stop (EV_P_ struct ev_child *w)
762	{	1338	{
763	idles [w->active - 1] = idles [--idlecnt];	1339	ev_clear_pending (EV_A_ (W)w);
764	ev_stop ((W)w);
765	}
766
767	void evcheck_start (struct ev_check *w)
768	{
769	if (ev_is_active (w))	1340	if (ev_is_active (w))
770	return;	1341	return;
771		1342
772	ev_start ((W)w, ++checkcnt);	1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
773	array_needsize (checks, checkmax, checkcnt, );
774	checks [checkcnt - 1] = w;
775	}
776
777	void evcheck_stop (struct ev_check *w)
778	{
779	checks [w->active - 1] = checks [--checkcnt];
780	ev_stop ((W)w);	1344	ev_stop (EV_A_ (W)w);
781	}	1345	}
782		1346
783	/*****************************************************************************/	1347	/*****************************************************************************/
784		1348
785	#if 0	1349	struct ev_once
786		1350	{
787	struct ev_io wio;	1351	struct ev_io io;
788
789	static void
790	sin_cb (struct ev_io *w, int revents)
791	{
792	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
793	}
794
795	static void
796	ocb (struct ev_timer *w, int revents)
797	{
798	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
799	evtimer_stop (w);
800	evtimer_start (w);
801	}
802
803	static void
804	scb (struct ev_signal *w, int revents)
805	{
806	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
807	evio_stop (&wio);
808	evio_start (&wio);
809	}
810
811	static void
812	gcb (struct ev_signal *w, int revents)
813	{
814	fprintf (stderr, "generic %x\n", revents);
815
816	}
817
818	int main (void)
819	{
820	ev_init (0);
821
822	evio_init (&wio, sin_cb, 0, EV_READ);
823	evio_start (&wio);
824
825	struct ev_timer t[10000];
826
827	#if 0
828	int i;
829	for (i = 0; i < 10000; ++i)
830	{
831	struct ev_timer *w = t + i;
832	evw_init (w, ocb, i);
833	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
834	evtimer_start (w);
835	if (drand48 () < 0.5)
836	evtimer_stop (w);
837	}
838	#endif
839
840	struct ev_timer t1;	1352	struct ev_timer to;
841	evtimer_init (&t1, ocb, 5, 10);	1353	void (cb)(int revents, void arg);
842	evtimer_start (&t1);	1354	void *arg;
		1355	};
843		1356
844	struct ev_signal sig;	1357	static void
845	evsignal_init (&sig, scb, SIGQUIT);	1358	once_cb (EV_P_ struct ev_once *once, int revents)
846	evsignal_start (&sig);	1359	{
		1360	void (cb)(int revents, void arg) = once->cb;
		1361	void *arg = once->arg;
847		1362
848	struct ev_check cw;	1363	ev_io_stop (EV_A_ &once->io);
849	evcheck_init (&cw, gcb);	1364	ev_timer_stop (EV_A_ &once->to);
850	evcheck_start (&cw);	1365	free (once);
851		1366
852	struct ev_idle iw;	1367	cb (revents, arg);
853	evidle_init (&iw, gcb);
854	evidle_start (&iw);
855
856	ev_loop (0);
857
858	return 0;
859	}	1368	}
860		1369
861	#endif	1370	static void
		1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1372	{
		1373	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1374	}
862		1375
		1376	static void
		1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1378	{
		1379	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1380	}
863		1381
		1382	void
		1383	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1384	{
		1385	struct ev_once *once = malloc (sizeof (struct ev_once));
864		1386
		1387	if (!once)
		1388	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1389	else
		1390	{
		1391	once->cb = cb;
		1392	once->arg = arg;
865		1393
		1394	ev_watcher_init (&once->io, once_cb_io);
		1395	if (fd >= 0)
		1396	{
		1397	ev_io_set (&once->io, fd, events);
		1398	ev_io_start (EV_A_ &once->io);
		1399	}
		1400
		1401	ev_watcher_init (&once->to, once_cb_to);
		1402	if (timeout >= 0.)
		1403	{
		1404	ev_timer_set (&once->to, timeout, 0.);
		1405	ev_timer_start (EV_A_ &once->to);
		1406	}
		1407	}
		1408	}
		1409

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Comparing libev/ev.c (file contents): Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs. Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC