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

Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 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
		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_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
14	#ifdef CLOCK_MONOTONIC	111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	113	# define EV_USE_MONOTONIC 0
16	#endif	114	#endif
17		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	118	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	119	#endif
20	#define HAVE_SELECT 1	120
		121	/**/
21		122
22	#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) */
23	#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 */
24		127
25	#include "ev.h"	128	#include "ev.h"
26		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)
		143
27	struct ev_watcher {	144	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);	145	typedef struct ev_watcher_list *WL;
		146	typedef struct ev_watcher_time *WT;
		147
		148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		149
		150	#if WIN32
		151	/* note: the comment below could not be substantiated, but what would I care */
		152	/* MSDN says this is required to handle SIGFPE */
		153	volatile double SIGFPE_REQ = 0.0f;
		154	#endif
		155
		156	/*****************************************************************************/
		157
		158	typedef struct
		159	{
		160	WL head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
		164
		165	typedef struct
		166	{
		167	W w;
		168	int events;
		169	} ANPENDING;
		170
		171	#if EV_MULTIPLICITY
		172
		173	struct ev_loop
		174	{
		175	# define VAR(name,decl) decl;
		176	# include "ev_vars.h"
29	};	177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
30		180
31	struct ev_watcher_list {	181	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		182
35	static ev_tstamp now, diff; /* monotonic clock */	183	# define VAR(name,decl) static decl;
36	ev_tstamp ev_now;	184	# include "ev_vars.h"
37	int ev_method;	185	# undef VAR
38		186
39	static int have_monotonic; /* runtime */	187	#endif
40
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		188
45	/*****************************************************************************/	189	/*****************************************************************************/
46		190
47	ev_tstamp	191	inline ev_tstamp
48	ev_time (void)	192	ev_time (void)
49	{	193	{
50	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
51	struct timespec ts;	195	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	198	#else
55	struct timeval tv;	199	struct timeval tv;
56	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	202	#endif
59	}	203	}
60		204
61	static ev_tstamp	205	inline ev_tstamp
62	get_clock (void)	206	get_clock (void)
63	{	207	{
64	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
65	if (have_monotonic)	209	if (expect_true (have_monotonic))
66	{	210	{
67	struct timespec ts;	211	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	214	}
71	#endif	215	#endif
72		216
73	return ev_time ();	217	return ev_time ();
74	}	218	}
75		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		227
76	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
77	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
78	{ \	230	{ \
79	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	232	do \
		233	{ \
		234	newcnt = array_roundsize (base, newcnt << 1); \
		235	} \
		236	while ((cnt) > newcnt); \
		237	\
81	base = realloc (base, sizeof (base) (newcnt)); \	238	base = realloc (base, sizeof (base) (newcnt)); \
82	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	240	cur = newcnt; \
84	}	241	}
85		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (base) (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
86	/*****************************************************************************/	254	/*****************************************************************************/
87		255
88	typedef struct
89	{
90	struct ev_io *head;
91	unsigned char wev, rev; /* want, received event set */
92	} ANFD;
93
94	static ANFD *anfds;
95	static int anfdmax;
96
97	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;
99
100	static void	256	static void
101	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
102	{	258	{
103	while (count--)	259	while (count--)
104	{	260	{
105	base->head = 0;	261	base->head = 0;
106	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
107	++base;	265	++base;
108	}	266	}
109	}	267	}
110		268
111	typedef struct
112	{
113	struct ev_watcher *w;
114	int events;
115	} ANPENDING;
116
117	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;
119
120	static void	269	static void
121	event (struct ev_watcher *w, int events)	270	event (EV_P_ W w, int events)
122	{	271	{
		272	if (w->pending)
		273	{
		274	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		275	return;
		276	}
		277
123	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
124	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
125	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
126	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
127	}	282	}
128		283
129	static void	284	static void
		285	queue_events (EV_P_ W *events, int eventcnt, int type)
		286	{
		287	int i;
		288
		289	for (i = 0; i < eventcnt; ++i)
		290	event (EV_A_ events [i], type);
		291	}
		292
		293	static void
130	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
131	{	295	{
132	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
133	struct ev_io *w;	297	struct ev_io *w;
134		298
135	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
136	{	300	{
137	int ev = w->events & events;	301	int ev = w->events & events;
138		302
139	if (ev)	303	if (ev)
140	event ((struct ev_watcher *)w, ev);	304	event (EV_A_ (W)w, ev);
141	}	305	}
142	}	306	}
143		307
144	/*****************************************************************************/	308	/*****************************************************************************/
145		309
146	static struct ev_timer **atimers;
147	static int atimermax, atimercnt;
148
149	static struct ev_timer **rtimers;
150	static int rtimermax, rtimercnt;
151
152	static void	310	static void
153	upheap (struct ev_timer **timers, int k)	311	fd_reify (EV_P)
154	{	312	{
155	struct ev_timer *w = timers [k];	313	int i;
156		314
		315	for (i = 0; i < fdchangecnt; ++i)
		316	{
		317	int fd = fdchanges [i];
		318	ANFD *anfd = anfds + fd;
		319	struct ev_io *w;
		320
		321	int events = 0;
		322
		323	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		324	events \|= w->events;
		325
		326	anfd->reify = 0;
		327
		328	method_modify (EV_A_ fd, anfd->events, events);
		329	anfd->events = events;
		330	}
		331
		332	fdchangecnt = 0;
		333	}
		334
		335	static void
		336	fd_change (EV_P_ int fd)
		337	{
		338	if (anfds [fd].reify \|\| fdchangecnt < 0)
		339	return;
		340
		341	anfds [fd].reify = 1;
		342
		343	++fdchangecnt;
		344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		345	fdchanges [fdchangecnt - 1] = fd;
		346	}
		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		357	}
		358	}
		359
		360	/* called on EBADF to verify fds */
		361	static void
		362	fd_ebadf (EV_P)
		363	{
		364	int fd;
		365
		366	for (fd = 0; fd < anfdmax; ++fd)
		367	if (anfds [fd].events)
		368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		369	fd_kill (EV_A_ fd);
		370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
		380	{
		381	fd_kill (EV_A_ fd);
		382	return;
		383	}
		384	}
		385
		386	/* susually called after fork if method needs to re-arm all fds from scratch */
		387	static void
		388	fd_rearm_all (EV_P)
		389	{
		390	int fd;
		391
		392	/* this should be highly optimised to not do anything but set a flag */
		393	for (fd = 0; fd < anfdmax; ++fd)
		394	if (anfds [fd].events)
		395	{
		396	anfds [fd].events = 0;
		397	fd_change (EV_A_ fd);
		398	}
		399	}
		400
		401	/*****************************************************************************/
		402
		403	static void
		404	upheap (WT *heap, int k)
		405	{
		406	WT w = heap [k];
		407
157	while (k && timers [k >> 1]->at > w->at)	408	while (k && heap [k >> 1]->at > w->at)
158	{	409	{
159	timers [k] = timers [k >> 1];	410	heap [k] = heap [k >> 1];
160	timers [k]->active = k + 1;	411	((W)heap [k])->active = k + 1;
161	k >>= 1;	412	k >>= 1;
162	}	413	}
163		414
164	timers [k] = w;	415	heap [k] = w;
165	timers [k]->active = k + 1;	416	((W)heap [k])->active = k + 1;
166		417
167	}	418	}
168		419
169	static void	420	static void
170	downheap (struct ev_timer **timers, int N, int k)	421	downheap (WT *heap, int N, int k)
171	{	422	{
172	struct ev_timer *w = timers [k];	423	WT w = heap [k];
173		424
174	while (k < (N >> 1))	425	while (k < (N >> 1))
175	{	426	{
176	int j = k << 1;	427	int j = k << 1;
177		428
178	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
179	++j;	430	++j;
180		431
181	if (w->at <= timers [j]->at)	432	if (w->at <= heap [j]->at)
182	break;	433	break;
183		434
184	timers [k] = timers [j];	435	heap [k] = heap [j];
185	timers [k]->active = k + 1;	436	((W)heap [k])->active = k + 1;
186	k = j;	437	k = j;
187	}	438	}
188		439
189	timers [k] = w;	440	heap [k] = w;
190	timers [k]->active = k + 1;	441	((W)heap [k])->active = k + 1;
191	}	442	}
192		443
193	/*****************************************************************************/	444	/*****************************************************************************/
194		445
195	typedef struct	446	typedef struct
196	{	447	{
197	struct ev_signal *head;	448	WL head;
198	sig_atomic_t gotsig;	449	sig_atomic_t volatile gotsig;
199	} ANSIG;	450	} ANSIG;
200		451
201	static ANSIG *signals;	452	static ANSIG *signals;
202	static int signalmax;	453	static int signalmax;
203		454
204	static int sigpipe [2];	455	static int sigpipe [2];
205	static sig_atomic_t gotsig;	456	static sig_atomic_t volatile gotsig;
206	static struct ev_io sigev;	457	static struct ev_io sigev;
207		458
208	static void	459	static void
209	signals_init (ANSIG *base, int count)	460	signals_init (ANSIG *base, int count)
210	{	461	{
211	while (count--)	462	while (count--)
212	{	463	{
213	base->head = 0;	464	base->head = 0;
214	base->gotsig = 0;	465	base->gotsig = 0;
		466
215	++base;	467	++base;
216	}	468	}
217	}	469	}
218		470
219	static void	471	static void
220	sighandler (int signum)	472	sighandler (int signum)
221	{	473	{
		474	#if WIN32
		475	signal (signum, sighandler);
		476	#endif
		477
222	signals [signum - 1].gotsig = 1;	478	signals [signum - 1].gotsig = 1;
223		479
224	if (!gotsig)	480	if (!gotsig)
225	{	481	{
		482	int old_errno = errno;
226	gotsig = 1;	483	gotsig = 1;
227	write (sigpipe [1], &gotsig, 1);	484	write (sigpipe [1], &signum, 1);
		485	errno = old_errno;
228	}	486	}
229	}	487	}
230		488
231	static void	489	static void
232	sigcb (struct ev_io *iow, int revents)	490	sigcb (EV_P_ struct ev_io *iow, int revents)
233	{	491	{
234	struct ev_signal *w;	492	WL w;
235	int sig;	493	int signum;
236		494
		495	read (sigpipe [0], &revents, 1);
237	gotsig = 0;	496	gotsig = 0;
238	read (sigpipe [0], &revents, 1);
239		497
240	for (sig = signalmax; sig--; )	498	for (signum = signalmax; signum--; )
241	if (signals [sig].gotsig)	499	if (signals [signum].gotsig)
242	{	500	{
243	signals [sig].gotsig = 0;	501	signals [signum].gotsig = 0;
244		502
245	for (w = signals [sig].head; w; w = w->next)	503	for (w = signals [signum].head; w; w = w->next)
246	event ((struct ev_watcher *)w, EV_SIGNAL);	504	event (EV_A_ (W)w, EV_SIGNAL);
247	}	505	}
248	}	506	}
249		507
250	static void	508	static void
251	siginit (void)	509	siginit (EV_P)
252	{	510	{
		511	#ifndef WIN32
253	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	512	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
254	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
255		514
256	/* rather than sort out wether we really need nb, set it */	515	/* rather than sort out wether we really need nb, set it */
257	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		518	#endif
259		519
260	evio_set (&sigev, sigpipe [0], EV_READ);	520	ev_io_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);	521	ev_io_start (EV_A_ &sigev);
		522	ev_unref (EV_A); /* child watcher should not keep loop alive */
262	}	523	}
263		524
264	/*****************************************************************************/	525	/*****************************************************************************/
265		526
		527	#ifndef WIN32
		528
		529	static struct ev_child *childs [PID_HASHSIZE];
		530	static struct ev_signal childev;
		531
		532	#ifndef WCONTINUED
		533	# define WCONTINUED 0
		534	#endif
		535
		536	static void
		537	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		538	{
		539	struct ev_child *w;
		540
		541	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		542	if (w->pid == pid \|\| !w->pid)
		543	{
		544	ev_priority (w) = ev_priority (sw); /* need to do it now */
		545	w->rpid = pid;
		546	w->rstatus = status;
		547	event (EV_A_ (W)w, EV_CHILD);
		548	}
		549	}
		550
		551	static void
		552	childcb (EV_P_ struct ev_signal *sw, int revents)
		553	{
		554	int pid, status;
		555
		556	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		557	{
		558	/* make sure we are called again until all childs have been reaped */
		559	event (EV_A_ (W)sw, EV_SIGNAL);
		560
		561	child_reap (EV_A_ sw, pid, pid, status);
		562	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		563	}
		564	}
		565
		566	#endif
		567
		568	/*****************************************************************************/
		569
		570	#if EV_USE_KQUEUE
		571	# include "ev_kqueue.c"
		572	#endif
266	#if HAVE_EPOLL	573	#if EV_USE_EPOLL
267	# include "ev_epoll.c"	574	# include "ev_epoll.c"
268	#endif	575	#endif
		576	#if EV_USE_POLL
		577	# include "ev_poll.c"
		578	#endif
269	#if HAVE_SELECT	579	#if EV_USE_SELECT
270	# include "ev_select.c"	580	# include "ev_select.c"
271	#endif	581	#endif
272		582
273	int ev_init (int flags)	583	int
		584	ev_version_major (void)
274	{	585	{
		586	return EV_VERSION_MAJOR;
		587	}
		588
		589	int
		590	ev_version_minor (void)
		591	{
		592	return EV_VERSION_MINOR;
		593	}
		594
		595	/* return true if we are running with elevated privileges and should ignore env variables */
		596	static int
		597	enable_secure (void)
		598	{
		599	#ifdef WIN32
		600	return 0;
		601	#else
		602	return getuid () != geteuid ()
		603	\|\| getgid () != getegid ();
		604	#endif
		605	}
		606
		607	int
		608	ev_method (EV_P)
		609	{
		610	return method;
		611	}
		612
		613	static void
		614	loop_init (EV_P_ int methods)
		615	{
		616	if (!method)
		617	{
275	#if HAVE_MONOTONIC	618	#if EV_USE_MONOTONIC
276	{	619	{
277	struct timespec ts;	620	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	621	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;	622	have_monotonic = 1;
280	}	623	}
281	#endif	624	#endif
282		625
283	ev_now = ev_time ();	626	rt_now = ev_time ();
284	now = get_clock ();	627	mn_now = get_clock ();
285	diff = ev_now - now;	628	now_floor = mn_now;
		629	rtmn_diff = rt_now - mn_now;
286		630
		631	if (methods == EVMETHOD_AUTO)
		632	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		633	methods = atoi (getenv ("LIBEV_METHODS"));
		634	else
		635	methods = EVMETHOD_ANY;
		636
		637	method = 0;
		638	#if EV_USE_WIN32
		639	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		640	#endif
		641	#if EV_USE_KQUEUE
		642	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		643	#endif
		644	#if EV_USE_EPOLL
		645	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		646	#endif
		647	#if EV_USE_POLL
		648	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		649	#endif
		650	#if EV_USE_SELECT
		651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		652	#endif
		653	}
		654	}
		655
		656	void
		657	loop_destroy (EV_P)
		658	{
		659	int i;
		660
		661	#if EV_USE_WIN32
		662	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		663	#endif
		664	#if EV_USE_KQUEUE
		665	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		666	#endif
		667	#if EV_USE_EPOLL
		668	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		669	#endif
		670	#if EV_USE_POLL
		671	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		672	#endif
		673	#if EV_USE_SELECT
		674	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		675	#endif
		676
		677	for (i = NUMPRI; i--; )
		678	array_free (pending, [i]);
		679
		680	array_free (fdchange, );
		681	array_free (timer, );
		682	array_free (periodic, );
		683	array_free (idle, );
		684	array_free (prepare, );
		685	array_free (check, );
		686
		687	method = 0;
		688	/TODO/
		689	}
		690
		691	void
		692	loop_fork (EV_P)
		693	{
		694	/TODO/
		695	#if EV_USE_EPOLL
		696	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		697	#endif
		698	#if EV_USE_KQUEUE
		699	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		700	#endif
		701	}
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop *
		705	ev_loop_new (int methods)
		706	{
		707	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		708
		709	loop_init (EV_A_ methods);
		710
		711	if (ev_method (EV_A))
		712	return loop;
		713
		714	return 0;
		715	}
		716
		717	void
		718	ev_loop_destroy (EV_P)
		719	{
		720	loop_destroy (EV_A);
		721	free (loop);
		722	}
		723
		724	void
		725	ev_loop_fork (EV_P)
		726	{
		727	loop_fork (EV_A);
		728	}
		729
		730	#endif
		731
		732	#if EV_MULTIPLICITY
		733	struct ev_loop default_loop_struct;
		734	static struct ev_loop *default_loop;
		735
		736	struct ev_loop *
		737	#else
		738	static int default_loop;
		739
		740	int
		741	#endif
		742	ev_default_loop (int methods)
		743	{
		744	if (sigpipe [0] == sigpipe [1])
287	if (pipe (sigpipe))	745	if (pipe (sigpipe))
288	return 0;	746	return 0;
289		747
290	ev_method = EVMETHOD_NONE;	748	if (!default_loop)
291	#if HAVE_EPOLL
292	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
293	#endif
294	#if HAVE_SELECT
295	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif
297
298	if (ev_method)
299	{	749	{
		750	#if EV_MULTIPLICITY
		751	struct ev_loop *loop = default_loop = &default_loop_struct;
		752	#else
		753	default_loop = 1;
		754	#endif
		755
		756	loop_init (EV_A_ methods);
		757
		758	if (ev_method (EV_A))
		759	{
300	evw_init (&sigev, sigcb, 0);	760	ev_watcher_init (&sigev, sigcb);
		761	ev_set_priority (&sigev, EV_MAXPRI);
301	siginit ();	762	siginit (EV_A);
302	}
303		763
304	return ev_method;	764	#ifndef WIN32
305	}	765	ev_signal_init (&childev, childcb, SIGCHLD);
306		766	ev_set_priority (&childev, EV_MAXPRI);
307	/*****************************************************************************/	767	ev_signal_start (EV_A_ &childev);
308		768	ev_unref (EV_A); /* child watcher should not keep loop alive */
309	void ev_prefork (void)
310	{
311	}
312
313	void ev_postfork_parent (void)
314	{
315	}
316
317	void ev_postfork_child (void)
318	{
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();
322	#endif	769	#endif
		770	}
		771	else
		772	default_loop = 0;
		773	}
323		774
		775	return default_loop;
		776	}
		777
		778	void
		779	ev_default_destroy (void)
		780	{
		781	#if EV_MULTIPLICITY
		782	struct ev_loop *loop = default_loop;
		783	#endif
		784
		785	ev_ref (EV_A); /* child watcher */
		786	ev_signal_stop (EV_A_ &childev);
		787
		788	ev_ref (EV_A); /* signal watcher */
324	evio_stop (&sigev);	789	ev_io_stop (EV_A_ &sigev);
		790
		791	close (sigpipe [0]); sigpipe [0] = 0;
		792	close (sigpipe [1]); sigpipe [1] = 0;
		793
		794	loop_destroy (EV_A);
		795	}
		796
		797	void
		798	ev_default_fork (void)
		799	{
		800	#if EV_MULTIPLICITY
		801	struct ev_loop *loop = default_loop;
		802	#endif
		803
		804	loop_fork (EV_A);
		805
		806	ev_io_stop (EV_A_ &sigev);
325	close (sigpipe [0]);	807	close (sigpipe [0]);
326	close (sigpipe [1]);	808	close (sigpipe [1]);
327	pipe (sigpipe);	809	pipe (sigpipe);
		810
		811	ev_ref (EV_A); /* signal watcher */
328	siginit ();	812	siginit (EV_A);
329	}	813	}
330		814
331	/*****************************************************************************/	815	/*****************************************************************************/
332		816
333	static ev_hook hooks [EVHOOK_NUM];
334
335	void
336	ev_hook_register (int type, ev_hook hook)
337	{
338	hooks [type] = hook;
339	}
340
341	void
342	ev_hook_unregister (int type, ev_hook hook)
343	{
344	hooks [type] = 0;
345	}
346
347	static void	817	static void
348	hook_call (int type)	818	call_pending (EV_P)
349	{	819	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void
355	fd_reify (void)
356	{
357	int i;	820	int pri;
358		821
359	for (i = 0; i < fdchangecnt; ++i)	822	for (pri = NUMPRI; pri--; )
360	{	823	while (pendingcnt [pri])
361	int fd = fdchanges [i];
362	ANFD *anfd = anfds + fd;
363	struct ev_io *w;
364
365	int wev = 0;
366
367	for (w = anfd->head; w; w = w->next)
368	wev \|= w->events;
369
370	if (anfd->wev != wev)
371	{	824	{
372	method_modify (fd, anfd->wev, wev);	825	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
373	anfd->wev = wev;
374	}
375	}
376		826
377	fdchangecnt = 0;
378	}
379
380	static void
381	call_pending ()
382	{
383	int i;
384
385	for (i = 0; i < pendingcnt; ++i)
386	{
387	ANPENDING *p = pendings + i;
388
389	if (p->w)	827	if (p->w)
390	{	828	{
391	p->w->pending = 0;	829	p->w->pending = 0;
392	p->w->cb (p->w, p->events);	830	p->w->cb (EV_A_ p->w, p->events);
393	}	831	}
394	}	832	}
395
396	pendingcnt = 0;
397	}	833	}
398		834
399	static void	835	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	836	timers_reify (EV_P)
401	{	837	{
402	while (timercnt && timers [0]->at <= now)	838	while (timercnt && ((WT)timers [0])->at <= mn_now)
403	{	839	{
404	struct ev_timer *w = timers [0];	840	struct ev_timer *w = timers [0];
		841
		842	assert (("inactive timer on timer heap detected", ev_is_active (w)));
405		843
406	/* first reschedule or stop timer */	844	/* first reschedule or stop timer */
407	if (w->repeat)	845	if (w->repeat)
408	{	846	{
409	if (w->is_abs)	847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
410	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
411	else
412	w->at = now + w->repeat;	848	((WT)w)->at = mn_now + w->repeat;
413
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	849	downheap ((WT *)timers, timercnt, 0);
417	}	850	}
418	else	851	else
		852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		853
		854	event (EV_A_ (W)w, EV_TIMEOUT);
		855	}
		856	}
		857
		858	static void
		859	periodics_reify (EV_P)
		860	{
		861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		862	{
		863	struct ev_periodic *w = periodics [0];
		864
		865	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		866
		867	/* first reschedule or stop timer */
		868	if (w->interval)
419	{	869	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	870	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
421	--timercnt; /* maybe pass by reference instead? */	871	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		872	downheap ((WT *)periodics, periodiccnt, 0);
422	}	873	}
		874	else
		875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
423		876
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	877	event (EV_A_ (W)w, EV_PERIODIC);
425	}	878	}
426	}	879	}
427		880
428	static void	881	static void
429	time_update ()	882	periodics_reschedule (EV_P)
430	{	883	{
431	int i;	884	int i;
432	ev_now = ev_time ();
433		885
434	if (have_monotonic)	886	/* adjust periodics after time jump */
		887	for (i = 0; i < periodiccnt; ++i)
435	{	888	{
436	ev_tstamp odiff = diff;	889	struct ev_periodic *w = periodics [i];
437		890
438	/* detecting time jumps is much more difficult */	891	if (w->interval)
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */
440	{	892	{
441	now = get_clock ();	893	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
442	diff = ev_now - now;
443		894
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	895	if (fabs (diff) >= 1e-4)
445	return; /* all is well */	896	{
		897	ev_periodic_stop (EV_A_ w);
		898	ev_periodic_start (EV_A_ w);
446		899
447	ev_now = ev_time ();	900	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		901	}
448	}	902	}
		903	}
		904	}
449		905
450	/* time jump detected, reschedule atimers */	906	inline int
451	for (i = 0; i < atimercnt; ++i)	907	time_update_monotonic (EV_P)
		908	{
		909	mn_now = get_clock ();
		910
		911	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		912	{
		913	rt_now = rtmn_diff + mn_now;
		914	return 0;
		915	}
		916	else
		917	{
		918	now_floor = mn_now;
		919	rt_now = ev_time ();
		920	return 1;
		921	}
		922	}
		923
		924	static void
		925	time_update (EV_P)
		926	{
		927	int i;
		928
		929	#if EV_USE_MONOTONIC
		930	if (expect_true (have_monotonic))
		931	{
		932	if (time_update_monotonic (EV_A))
452	{	933	{
453	struct ev_timer *w = atimers [i];	934	ev_tstamp odiff = rtmn_diff;
454	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	935
		936	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		937	{
		938	rtmn_diff = rt_now - mn_now;
		939
		940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		941	return; /* all is well */
		942
		943	rt_now = ev_time ();
		944	mn_now = get_clock ();
		945	now_floor = mn_now;
		946	}
		947
		948	periodics_reschedule (EV_A);
		949	/* no timer adjustment, as the monotonic clock doesn't jump */
		950	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
455	}	951	}
456	}	952	}
457	else	953	else
		954	#endif
458	{	955	{
459	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	956	rt_now = ev_time ();
460	/* time jump detected, adjust rtimers */	957
		958	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		959	{
		960	periodics_reschedule (EV_A);
		961
		962	/* adjust timers. this is easy, as the offset is the same for all */
461	for (i = 0; i < rtimercnt; ++i)	963	for (i = 0; i < timercnt; ++i)
462	rtimers [i]->at += ev_now - now;	964	((WT)timers [i])->at += rt_now - mn_now;
		965	}
463		966
464	now = ev_now;	967	mn_now = rt_now;
465	}	968	}
466	}	969	}
467		970
468	int ev_loop_done;	971	void
		972	ev_ref (EV_P)
		973	{
		974	++activecnt;
		975	}
469		976
		977	void
		978	ev_unref (EV_P)
		979	{
		980	--activecnt;
		981	}
		982
		983	static int loop_done;
		984
		985	void
470	void ev_loop (int flags)	986	ev_loop (EV_P_ int flags)
471	{	987	{
472	double block;	988	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	989	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
474		990
475	do	991	do
476	{	992	{
477	hook_call (EVHOOK_PREPOLL);	993	/* queue check watchers (and execute them) */
		994	if (expect_false (preparecnt))
		995	{
		996	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		997	call_pending (EV_A);
		998	}
478		999
479	/* update fd-related kernel structures */	1000	/* update fd-related kernel structures */
480	fd_reify ();	1001	fd_reify (EV_A);
481		1002
482	/* calculate blocking time */	1003	/* calculate blocking time */
		1004
		1005	/* we only need this for !monotonic clockor timers, but as we basically
		1006	always have timers, we just calculate it always */
		1007	#if EV_USE_MONOTONIC
		1008	if (expect_true (have_monotonic))
		1009	time_update_monotonic (EV_A);
		1010	else
		1011	#endif
		1012	{
		1013	rt_now = ev_time ();
		1014	mn_now = rt_now;
		1015	}
		1016
483	if (flags & EVLOOP_NONBLOCK)	1017	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
484	block = 0.;	1018	block = 0.;
485	else	1019	else
486	{	1020	{
487	block = MAX_BLOCKTIME;	1021	block = MAX_BLOCKTIME;
488		1022
489	if (rtimercnt)	1023	if (timercnt)
490	{	1024	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1025	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
492	if (block > to) block = to;	1026	if (block > to) block = to;
493	}	1027	}
494		1028
495	if (atimercnt)	1029	if (periodiccnt)
496	{	1030	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
498	if (block > to) block = to;	1032	if (block > to) block = to;
499	}	1033	}
500		1034
501	if (block < 0.) block = 0.;	1035	if (block < 0.) block = 0.;
502	}	1036	}
503		1037
504	method_poll (block);	1038	method_poll (EV_A_ block);
505		1039
506	/* update ev_now, do magic */	1040	/* update rt_now, do magic */
507	time_update ();	1041	time_update (EV_A);
508		1042
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	1043	/* queue pending timers and reschedule them */
512	/* absolute timers first */	1044	timers_reify (EV_A); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	1045	periodics_reify (EV_A); /* absolute timers called first */
514	/* relative timers second */
515	timers_reify (rtimers, rtimercnt, now);
516		1046
		1047	/* queue idle watchers unless io or timers are pending */
		1048	if (!pendingcnt)
		1049	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1050
		1051	/* queue check watchers, to be executed first */
		1052	if (checkcnt)
		1053	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1054
517	call_pending ();	1055	call_pending (EV_A);
518	}	1056	}
519	while (!ev_loop_done);	1057	while (activecnt && !loop_done);
		1058
		1059	if (loop_done != 2)
		1060	loop_done = 0;
		1061	}
		1062
		1063	void
		1064	ev_unloop (EV_P_ int how)
		1065	{
		1066	loop_done = how;
520	}	1067	}
521		1068
522	/*****************************************************************************/	1069	/*****************************************************************************/
523		1070
524	static void	1071	inline void
525	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	1072	wlist_add (WL *head, WL elem)
526	{	1073	{
527	elem->next = *head;	1074	elem->next = *head;
528	*head = elem;	1075	*head = elem;
529	}	1076	}
530		1077
531	static void	1078	inline void
532	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1079	wlist_del (WL *head, WL elem)
533	{	1080	{
534	while (*head)	1081	while (*head)
535	{	1082	{
536	if (*head == elem)	1083	if (*head == elem)
537	{	1084	{
541		1088
542	head = &(*head)->next;	1089	head = &(*head)->next;
543	}	1090	}
544	}	1091	}
545		1092
546	static void	1093	inline void
547	ev_start (struct ev_watcher *w, int active)	1094	ev_clear_pending (EV_P_ W w)
548	{	1095	{
		1096	if (w->pending)
		1097	{
		1098	pendings [ABSPRI (w)][w->pending - 1].w = 0;
549	w->pending = 0;	1099	w->pending = 0;
		1100	}
		1101	}
		1102
		1103	inline void
		1104	ev_start (EV_P_ W w, int active)
		1105	{
		1106	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1107	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1108
550	w->active = active;	1109	w->active = active;
		1110	ev_ref (EV_A);
551	}	1111	}
552		1112
553	static void	1113	inline void
554	ev_stop (struct ev_watcher *w)	1114	ev_stop (EV_P_ W w)
555	{	1115	{
556	if (w->pending)	1116	ev_unref (EV_A);
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	1117	w->active = 0;
560	/* nop */
561	}	1118	}
562		1119
563	/*****************************************************************************/	1120	/*****************************************************************************/
564		1121
565	void	1122	void
566	evio_start (struct ev_io *w)	1123	ev_io_start (EV_P_ struct ev_io *w)
567	{	1124	{
		1125	int fd = w->fd;
		1126
568	if (ev_is_active (w))	1127	if (ev_is_active (w))
569	return;	1128	return;
570		1129
571	int fd = w->fd;	1130	assert (("ev_io_start called with negative fd", fd >= 0));
572		1131
573	ev_start ((struct ev_watcher *)w, 1);	1132	ev_start (EV_A_ (W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1133	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	1134	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		1135
577	++fdchangecnt;	1136	fd_change (EV_A_ fd);
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;
580	}	1137	}
581		1138
582	void	1139	void
583	evio_stop (struct ev_io *w)	1140	ev_io_stop (EV_P_ struct ev_io *w)
584	{	1141	{
		1142	ev_clear_pending (EV_A_ (W)w);
585	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
586	return;	1144	return;
587		1145
588	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	1146	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
589	ev_stop ((struct ev_watcher *)w);	1147	ev_stop (EV_A_ (W)w);
590		1148
591	++fdchangecnt;	1149	fd_change (EV_A_ w->fd);
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;
594	}	1150	}
595		1151
596	void	1152	void
597	evtimer_start (struct ev_timer *w)	1153	ev_timer_start (EV_P_ struct ev_timer *w)
598	{	1154	{
599	if (ev_is_active (w))	1155	if (ev_is_active (w))
600	return;	1156	return;
601		1157
602	if (w->is_abs)	1158	((WT)w)->at += mn_now;
		1159
		1160	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1161
		1162	ev_start (EV_A_ (W)w, ++timercnt);
		1163	array_needsize (timers, timermax, timercnt, );
		1164	timers [timercnt - 1] = w;
		1165	upheap ((WT *)timers, timercnt - 1);
		1166
		1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1168	}
		1169
		1170	void
		1171	ev_timer_stop (EV_P_ struct ev_timer *w)
		1172	{
		1173	ev_clear_pending (EV_A_ (W)w);
		1174	if (!ev_is_active (w))
		1175	return;
		1176
		1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1178
		1179	if (((W)w)->active < timercnt--)
		1180	{
		1181	timers [((W)w)->active - 1] = timers [timercnt];
		1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
603	{	1183	}
604	/* this formula differs from the one in timer_reify becuse we do not round up */	1184
		1185	((WT)w)->at = w->repeat;
		1186
		1187	ev_stop (EV_A_ (W)w);
		1188	}
		1189
		1190	void
		1191	ev_timer_again (EV_P_ struct ev_timer *w)
		1192	{
		1193	if (ev_is_active (w))
		1194	{
605	if (w->repeat)	1195	if (w->repeat)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1196	{
607		1197	((WT)w)->at = mn_now + w->repeat;
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
609	array_needsize (atimers, atimermax, atimercnt, );	1199	}
610	atimers [atimercnt - 1] = w;
611	upheap (atimers, atimercnt - 1);
612	}
613	else	1200	else
		1201	ev_timer_stop (EV_A_ w);
614	{	1202	}
615	w->at += now;	1203	else if (w->repeat)
616		1204	ev_timer_start (EV_A_ w);
617	ev_start ((struct ev_watcher *)w, ++rtimercnt);
618	array_needsize (rtimers, rtimermax, rtimercnt, );
619	rtimers [rtimercnt - 1] = w;
620	upheap (rtimers, rtimercnt - 1);
621	}
622
623	}	1205	}
624		1206
625	void	1207	void
626	evtimer_stop (struct ev_timer *w)	1208	ev_periodic_start (EV_P_ struct ev_periodic *w)
627	{	1209	{
		1210	if (ev_is_active (w))
		1211	return;
		1212
		1213	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1214
		1215	/* this formula differs from the one in periodic_reify because we do not always round up */
		1216	if (w->interval)
		1217	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1218
		1219	ev_start (EV_A_ (W)w, ++periodiccnt);
		1220	array_needsize (periodics, periodicmax, periodiccnt, );
		1221	periodics [periodiccnt - 1] = w;
		1222	upheap ((WT *)periodics, periodiccnt - 1);
		1223
		1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1225	}
		1226
		1227	void
		1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
628	if (!ev_is_active (w))	1231	if (!ev_is_active (w))
629	return;	1232	return;
630		1233
631	if (w->is_abs)	1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
632	{	1235
633	if (w->active < atimercnt--)	1236	if (((W)w)->active < periodiccnt--)
634	{
635	atimers [w->active - 1] = atimers [atimercnt];
636	downheap (atimers, atimercnt, w->active - 1);
637	}
638	}	1237	{
639	else	1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
640	{	1240	}
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		1241
648	ev_stop ((struct ev_watcher *)w);	1242	ev_stop (EV_A_ (W)w);
649	}	1243	}
650		1244
651	void	1245	void
652	evsignal_start (struct ev_signal *w)	1246	ev_idle_start (EV_P_ struct ev_idle *w)
653	{	1247	{
654	if (ev_is_active (w))	1248	if (ev_is_active (w))
655	return;	1249	return;
656		1250
657	ev_start ((struct ev_watcher *)w, 1);	1251	ev_start (EV_A_ (W)w, ++idlecnt);
		1252	array_needsize (idles, idlemax, idlecnt, );
		1253	idles [idlecnt - 1] = w;
		1254	}
		1255
		1256	void
		1257	ev_idle_stop (EV_P_ struct ev_idle *w)
		1258	{
		1259	ev_clear_pending (EV_A_ (W)w);
		1260	if (ev_is_active (w))
		1261	return;
		1262
		1263	idles [((W)w)->active - 1] = idles [--idlecnt];
		1264	ev_stop (EV_A_ (W)w);
		1265	}
		1266
		1267	void
		1268	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1269	{
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	ev_start (EV_A_ (W)w, ++preparecnt);
		1274	array_needsize (prepares, preparemax, preparecnt, );
		1275	prepares [preparecnt - 1] = w;
		1276	}
		1277
		1278	void
		1279	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1280	{
		1281	ev_clear_pending (EV_A_ (W)w);
		1282	if (ev_is_active (w))
		1283	return;
		1284
		1285	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1286	ev_stop (EV_A_ (W)w);
		1287	}
		1288
		1289	void
		1290	ev_check_start (EV_P_ struct ev_check *w)
		1291	{
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	ev_start (EV_A_ (W)w, ++checkcnt);
		1296	array_needsize (checks, checkmax, checkcnt, );
		1297	checks [checkcnt - 1] = w;
		1298	}
		1299
		1300	void
		1301	ev_check_stop (EV_P_ struct ev_check *w)
		1302	{
		1303	ev_clear_pending (EV_A_ (W)w);
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	checks [((W)w)->active - 1] = checks [--checkcnt];
		1308	ev_stop (EV_A_ (W)w);
		1309	}
		1310
		1311	#ifndef SA_RESTART
		1312	# define SA_RESTART 0
		1313	#endif
		1314
		1315	void
		1316	ev_signal_start (EV_P_ struct ev_signal *w)
		1317	{
		1318	#if EV_MULTIPLICITY
		1319	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1320	#endif
		1321	if (ev_is_active (w))
		1322	return;
		1323
		1324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1325
		1326	ev_start (EV_A_ (W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	1327	array_needsize (signals, signalmax, w->signum, signals_init);
659	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		1329
661	if (!w->next)	1330	if (!((WL)w)->next)
662	{	1331	{
		1332	#if WIN32
		1333	signal (w->signum, sighandler);
		1334	#else
663	struct sigaction sa;	1335	struct sigaction sa;
664	sa.sa_handler = sighandler;	1336	sa.sa_handler = sighandler;
665	sigfillset (&sa.sa_mask);	1337	sigfillset (&sa.sa_mask);
666	sa.sa_flags = 0;	1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
667	sigaction (w->signum, &sa, 0);	1339	sigaction (w->signum, &sa, 0);
		1340	#endif
668	}	1341	}
669	}	1342	}
670		1343
671	void	1344	void
672	evsignal_stop (struct ev_signal *w)	1345	ev_signal_stop (EV_P_ struct ev_signal *w)
673	{	1346	{
		1347	ev_clear_pending (EV_A_ (W)w);
674	if (!ev_is_active (w))	1348	if (!ev_is_active (w))
675	return;	1349	return;
676		1350
677	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1351	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	1352	ev_stop (EV_A_ (W)w);
679		1353
680	if (!signals [w->signum - 1].head)	1354	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	1355	signal (w->signum, SIG_DFL);
682	}	1356	}
683		1357
		1358	void
		1359	ev_child_start (EV_P_ struct ev_child *w)
		1360	{
		1361	#if EV_MULTIPLICITY
		1362	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1363	#endif
		1364	if (ev_is_active (w))
		1365	return;
		1366
		1367	ev_start (EV_A_ (W)w, 1);
		1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1369	}
		1370
		1371	void
		1372	ev_child_stop (EV_P_ struct ev_child *w)
		1373	{
		1374	ev_clear_pending (EV_A_ (W)w);
		1375	if (ev_is_active (w))
		1376	return;
		1377
		1378	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1379	ev_stop (EV_A_ (W)w);
		1380	}
		1381
684	/*****************************************************************************/	1382	/*****************************************************************************/
685	#if 1
686		1383
687	static void	1384	struct ev_once
688	sin_cb (struct ev_io *w, int revents)
689	{	1385	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
691	}
692
693	static void
694	ocb (struct ev_timer *w, int revents)
695	{
696	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
697	evtimer_stop (w);
698	evtimer_start (w);
699	}
700
701	static void
702	scb (struct ev_signal *w, int revents)
703	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
705	}
706
707	int main (void)
708	{
709	struct ev_io sin;	1386	struct ev_io io;
710
711	ev_init (0);
712
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);
715	evio_start (&sin);
716
717	struct ev_timer t[10000];
718
719	#if 1
720	int i;
721	for (i = 0; i < 10000; ++i)
722	{
723	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);
726	evtimer_start (w);
727	if (drand48 () < 0.5)
728	evtimer_stop (w);
729	}
730	#endif
731
732	struct ev_timer t1;	1387	struct ev_timer to;
733	evw_init (&t1, ocb, 0);	1388	void (cb)(int revents, void arg);
734	evtimer_set_abs (&t1, 5, 10);	1389	void *arg;
735	evtimer_start (&t1);	1390	};
736		1391
737	struct ev_signal sig;	1392	static void
738	evw_init (&sig, scb, 65535);	1393	once_cb (EV_P_ struct ev_once *once, int revents)
739	evsignal_set (&sig, SIGQUIT);	1394	{
740	evsignal_start (&sig);	1395	void (cb)(int revents, void arg) = once->cb;
		1396	void *arg = once->arg;
741		1397
742	ev_loop (0);	1398	ev_io_stop (EV_A_ &once->io);
		1399	ev_timer_stop (EV_A_ &once->to);
		1400	free (once);
743		1401
744	return 0;	1402	cb (revents, arg);
745	}	1403	}
746		1404
747	#endif	1405	static void
		1406	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1407	{
		1408	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1409	}
748		1410
		1411	static void
		1412	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1413	{
		1414	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1415	}
749		1416
		1417	void
		1418	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1419	{
		1420	struct ev_once *once = malloc (sizeof (struct ev_once));
750		1421
		1422	if (!once)
		1423	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1424	else
		1425	{
		1426	once->cb = cb;
		1427	once->arg = arg;
751		1428
		1429	ev_watcher_init (&once->io, once_cb_io);
		1430	if (fd >= 0)
		1431	{
		1432	ev_io_set (&once->io, fd, events);
		1433	ev_io_start (EV_A_ &once->io);
		1434	}
		1435
		1436	ev_watcher_init (&once->to, once_cb_to);
		1437	if (timeout >= 0.)
		1438	{
		1439	ev_timer_set (&once->to, timeout, 0.);
		1440	ev_timer_start (EV_A_ &once->to);
		1441	}
		1442	}
		1443	}
		1444

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Comparing libev/ev.c (file contents): Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs. Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC