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

Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
3	#include <unistd.h>	37	#include <unistd.h>
4	#include <fcntl.h>	38	#include <fcntl.h>
5	#include <signal.h>	39	#include <signal.h>
		40	#include <stddef.h>
6		41
7	#include <stdio.h>	42	#include <stdio.h>
8		43
9	#include <assert.h>	44	#include <assert.h>
10	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
11	#include <sys/time.h>	50	#include <sys/time.h>
12	#include <time.h>	51	#include <time.h>
13		52
		53	/**/
		54
		55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
14	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
16	#endif	84	#endif
17		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	89	#endif
20	#define HAVE_SELECT 1	90
		91	/**/
21		92
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
24		97
25	#include "ev.h"	98	#include "ev.h"
26		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		113
27	struct ev_watcher {	114	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
		117
		118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		119
		120	/*****************************************************************************/
		121
		122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
29	};	141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
30		144
31	struct ev_watcher_list {	145	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		146
35	static ev_tstamp now, diff; /* monotonic clock */	147	# define VAR(name,decl) static decl;
36	ev_tstamp ev_now;	148	# include "ev_vars.h"
37	int ev_method;	149	# undef VAR
38		150
39	static int have_monotonic; /* runtime */	151	#endif
40		152
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	153	/*****************************************************************************/
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		154
45	ev_tstamp	155	inline ev_tstamp
46	ev_time (void)	156	ev_time (void)
47	{	157	{
48	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
49	struct timespec ts;	159	struct timespec ts;
50	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
51	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
52	#else	162	#else
53	struct timeval tv;	163	struct timeval tv;
54	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
55	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
56	#endif	166	#endif
57	}	167	}
58		168
59	static ev_tstamp	169	inline ev_tstamp
60	get_clock (void)	170	get_clock (void)
61	{	171	{
62	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
63	if (have_monotonic)	173	if (expect_true (have_monotonic))
64	{	174	{
65	struct timespec ts;	175	struct timespec ts;
66	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
67	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
68	}	178	}
69	#endif	179	#endif
70		180
71	return ev_time ();	181	return ev_time ();
72	}	182	}
73		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		191
74	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
75	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
76	{ \	194	{ \
77	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
78	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
79	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
80	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
81	cur = newcnt; \	204	cur = newcnt; \
82	}	205	}
83		206
84	typedef struct	207	/*****************************************************************************/
85	{
86	struct ev_io *head;
87	unsigned char wev, rev; /* want, received event set */
88	} ANFD;
89
90	static ANFD *anfds;
91	static int anfdmax;
92
93	static int *fdchanges;
94	static int fdchangemax, fdchangecnt;
95		208
96	static void	209	static void
97	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
98	{	211	{
99	while (count--)	212	while (count--)
100	{	213	{
101	base->head = 0;	214	base->head = 0;
102	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
103	++base;	218	++base;
104	}	219	}
105	}	220	}
106		221
107	typedef struct
108	{
109	struct ev_watcher *w;
110	int events;
111	} ANPENDING;
112
113	static ANPENDING *pendings;
114	static int pendingmax, pendingcnt;
115
116	static void	222	static void
117	event (struct ev_watcher *w, int events)	223	event (EV_P_ W w, int events)
118	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
		229	}
		230
119	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
120	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
121	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
122	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
123	}	235	}
124		236
125	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
126	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
127	{	248	{
128	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
129	struct ev_io *w;	250	struct ev_io *w;
130		251
131	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
132	{	253	{
133	int ev = w->events & events;	254	int ev = w->events & events;
134		255
135	if (ev)	256	if (ev)
136	event ((struct ev_watcher *)w, ev);	257	event (EV_A_ (W)w, ev);
		258	}
		259	}
		260
		261	/*****************************************************************************/
		262
		263	static void
		264	fd_reify (EV_P)
		265	{
		266	int i;
		267
		268	for (i = 0; i < fdchangecnt; ++i)
		269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		277	events \|= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify \|\| fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
		314	}
		315
		316	/* called on EBADF to verify fds */
		317	static void
		318	fd_ebadf (EV_P)
		319	{
		320	int fd;
		321
		322	for (fd = 0; fd < anfdmax; ++fd)
		323	if (anfds [fd].events)
		324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
137	}	340	}
138	}	341	}
139		342
140	static struct ev_timer **atimers;	343	/* susually called after fork if method needs to re-arm all fds from scratch */
141	static int atimermax, atimercnt;
142
143	static struct ev_timer **rtimers;
144	static int rtimermax, rtimercnt;
145
146	static void	344	static void
147	upheap (struct ev_timer **timers, int k)	345	fd_rearm_all (EV_P)
148	{	346	{
149	struct ev_timer *w = timers [k];	347	int fd;
150		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
		356	}
		357
		358	/*****************************************************************************/
		359
		360	static void
		361	upheap (WT *heap, int k)
		362	{
		363	WT w = heap [k];
		364
151	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
152	{	366	{
153	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
154	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
155	k >>= 1;	369	k >>= 1;
156	}	370	}
157		371
158	timers [k] = w;	372	heap [k] = w;
159	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
160		374
161	}	375	}
162		376
163	static void	377	static void
164	downheap (struct ev_timer **timers, int N, int k)	378	downheap (WT *heap, int N, int k)
165	{	379	{
166	struct ev_timer *w = timers [k];	380	WT w = heap [k];
167		381
168	while (k < (N >> 1))	382	while (k < (N >> 1))
169	{	383	{
170	int j = k << 1;	384	int j = k << 1;
171		385
172	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
173	++j;	387	++j;
174		388
175	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
176	break;	390	break;
177		391
178	timers [k] = timers [j];	392	heap [k] = heap [j];
179	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
180	k = j;	394	k = j;
181	}	395	}
182		396
183	timers [k] = w;	397	heap [k] = w;
184	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
185	}	399	}
		400
		401	/*****************************************************************************/
186		402
187	typedef struct	403	typedef struct
188	{	404	{
189	struct ev_signal *head;	405	struct ev_watcher_list *head;
190	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
191	} ANSIG;	407	} ANSIG;
192		408
193	static ANSIG *signals;	409	static ANSIG *signals;
194	static int signalmax;	410	static int signalmax;
195		411
196	static int sigpipe [2];	412	static int sigpipe [2];
197	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
198	static struct ev_io sigev;
199		414
200	static void	415	static void
201	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
202	{	417	{
203	while (count--)	418	while (count--)
204	{	419	{
205	base->head = 0;	420	base->head = 0;
206	base->gotsig = 0;	421	base->gotsig = 0;
		422
207	++base;	423	++base;
208	}	424	}
209	}	425	}
210		426
211	static void	427	static void
213	{	429	{
214	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
215		431
216	if (!gotsig)	432	if (!gotsig)
217	{	433	{
		434	int old_errno = errno;
218	gotsig = 1;	435	gotsig = 1;
219	write (sigpipe [1], &gotsig, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
220	}	438	}
221	}	439	}
222		440
223	static void	441	static void
224	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
225	{	443	{
226	struct ev_signal *w;	444	struct ev_watcher_list *w;
227	int sig;	445	int signum;
228		446
		447	read (sigpipe [0], &revents, 1);
229	gotsig = 0;	448	gotsig = 0;
230	read (sigpipe [0], &revents, 1);
231		449
232	for (sig = signalmax; sig--; )	450	for (signum = signalmax; signum--; )
233	if (signals [sig].gotsig)	451	if (signals [signum].gotsig)
234	{	452	{
235	signals [sig].gotsig = 0;	453	signals [signum].gotsig = 0;
236		454
237	for (w = signals [sig].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
238	event ((struct ev_watcher *)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
239	}	457	}
240	}	458	}
241		459
242	static void	460	static void
243	siginit (void)	461	siginit (EV_P)
244	{	462	{
		463	#ifndef WIN32
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247		466
248	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
251		471
252	evio_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
254	}	475	}
255		476
		477	/*****************************************************************************/
		478
		479	#ifndef WIN32
		480
		481	#ifndef WCONTINUED
		482	# define WCONTINUED 0
		483	#endif
		484
		485	static void
		486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		487	{
		488	struct ev_child *w;
		489
		490	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		491	if (w->pid == pid \|\| !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it now */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
		503	int pid, status;
		504
		505	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		506	{
		507	/* make sure we are called again until all childs have been reaped */
		508	event (EV_A_ (W)sw, EV_SIGNAL);
		509
		510	child_reap (EV_A_ sw, pid, pid, status);
		511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
		513	}
		514
		515	#endif
		516
		517	/*****************************************************************************/
		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
256	#if HAVE_EPOLL	522	#if EV_USE_EPOLL
257	# include "ev_epoll.c"	523	# include "ev_epoll.c"
258	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
259	#if HAVE_SELECT	528	#if EV_USE_SELECT
260	# include "ev_select.c"	529	# include "ev_select.c"
261	#endif	530	#endif
262		531
263	int ev_init (int flags)	532	int
		533	ev_version_major (void)
264	{	534	{
		535	return EV_VERSION_MAJOR;
		536	}
		537
		538	int
		539	ev_version_minor (void)
		540	{
		541	return EV_VERSION_MINOR;
		542	}
		543
		544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
		547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	\|\| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
		565	if (!method)
		566	{
265	#if HAVE_MONOTONIC	567	#if EV_USE_MONOTONIC
266	{	568	{
267	struct timespec ts;	569	struct timespec ts;
268	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269	have_monotonic = 1;	571	have_monotonic = 1;
270	}	572	}
271	#endif	573	#endif
272		574
273	ev_now = ev_time ();	575	rt_now = ev_time ();
274	now = get_clock ();	576	mn_now = get_clock ();
275	diff = ev_now - now;	577	now_floor = mn_now;
		578	rtmn_diff = rt_now - mn_now;
276		579
		580	if (methods == EVMETHOD_AUTO)
		581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
		584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
		590	#if EV_USE_EPOLL
		591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		595	#endif
		596	#if EV_USE_SELECT
		597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		598	#endif
		599	}
		600	}
		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/TODO/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/TODO/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
277	if (pipe (sigpipe))	676	if (pipe (sigpipe))
278	return 0;	677	return 0;
279		678
280	ev_method = EVMETHOD_NONE;	679	if (!default_loop)
281	#if HAVE_EPOLL
282	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
283	#endif
284	#if HAVE_SELECT
285	if (ev_method == EVMETHOD_NONE) select_init (flags);
286	#endif
287
288	if (ev_method)
289	{	680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
		689	if (ev_method (EV_A))
		690	{
290	evw_init (&sigev, sigcb, 0);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
291	siginit ();	693	siginit (EV_A);
292	}
293		694
294	return ev_method;	695	#ifndef WIN32
295	}	696	ev_signal_init (&childev, childcb, SIGCHLD);
296		697	ev_set_priority (&childev, EV_MAXPRI);
297	void ev_prefork (void)	698	ev_signal_start (EV_A_ &childev);
298	{	699	ev_unref (EV_A); /* child watcher should not keep loop alive */
299	}
300
301	void ev_postfork_parent (void)
302	{
303	}
304
305	void ev_postfork_child (void)
306	{
307	#if HAVE_EPOLL
308	if (ev_method == EVMETHOD_EPOLL)
309	epoll_postfork_child ();
310	#endif	700	#endif
		701	}
		702	else
		703	default_loop = 0;
		704	}
311		705
		706	return default_loop;
		707	}
		708
		709	void
		710	ev_default_destroy (void)
		711	{
		712	#if EV_MULTIPLICITY
		713	struct ev_loop *loop = default_loop;
		714	#endif
		715
		716	ev_ref (EV_A); /* child watcher */
		717	ev_signal_stop (EV_A_ &childev);
		718
		719	ev_ref (EV_A); /* signal watcher */
312	evio_stop (&sigev);	720	ev_io_stop (EV_A_ &sigev);
		721
		722	close (sigpipe [0]); sigpipe [0] = 0;
		723	close (sigpipe [1]); sigpipe [1] = 0;
		724
		725	loop_destroy (EV_A);
		726	}
		727
		728	void
		729	ev_default_fork (EV_P)
		730	{
		731	loop_fork (EV_A);
		732
		733	ev_io_stop (EV_A_ &sigev);
313	close (sigpipe [0]);	734	close (sigpipe [0]);
314	close (sigpipe [1]);	735	close (sigpipe [1]);
315	pipe (sigpipe);	736	pipe (sigpipe);
		737
		738	ev_ref (EV_A); /* signal watcher */
316	siginit ();	739	siginit (EV_A);
317	}	740	}
318		741
		742	/*****************************************************************************/
		743
319	static void	744	static void
320	fd_reify (void)	745	call_pending (EV_P)
321	{	746	{
322	int i;	747	int pri;
323		748
324	for (i = 0; i < fdchangecnt; ++i)	749	for (pri = NUMPRI; pri--; )
325	{	750	while (pendingcnt [pri])
326	int fd = fdchanges [i];
327	ANFD *anfd = anfds + fd;
328	struct ev_io *w;
329
330	int wev = 0;
331
332	for (w = anfd->head; w; w = w->next)
333	wev \|= w->events;
334
335	if (anfd->wev != wev)
336	{	751	{
337	method_modify (fd, anfd->wev, wev);	752	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
338	anfd->wev = wev;
339	}
340	}
341		753
342	fdchangecnt = 0;
343	}
344
345	static void
346	call_pending ()
347	{
348	int i;
349
350	for (i = 0; i < pendingcnt; ++i)
351	{
352	ANPENDING *p = pendings + i;
353
354	if (p->w)	754	if (p->w)
355	{	755	{
356	p->w->pending = 0;	756	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	757	p->w->cb (EV_A_ p->w, p->events);
358	}	758	}
359	}	759	}
360
361	pendingcnt = 0;
362	}	760	}
363		761
364	static void	762	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	763	timers_reify (EV_P)
366	{	764	{
367	while (timercnt && timers [0]->at <= now)	765	while (timercnt && timers [0]->at <= mn_now)
368	{	766	{
369	struct ev_timer *w = timers [0];	767	struct ev_timer *w = timers [0];
370		768
371	/* first reschedule or stop timer */	769	/* first reschedule or stop timer */
372	if (w->repeat)	770	if (w->repeat)
373	{	771	{
374	if (w->is_abs)	772	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
376	else
377	w->at = now + w->repeat;	773	w->at = mn_now + w->repeat;
378
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	774	downheap ((WT *)timers, timercnt, 0);
382	}	775	}
383	else	776	else
		777	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		778
		779	event (EV_A_ (W)w, EV_TIMEOUT);
		780	}
		781	}
		782
		783	static void
		784	periodics_reify (EV_P)
		785	{
		786	while (periodiccnt && periodics [0]->at <= rt_now)
		787	{
		788	struct ev_periodic *w = periodics [0];
		789
		790	/* first reschedule or stop timer */
		791	if (w->interval)
384	{	792	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	793	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
386	--timercnt; /* maybe pass by reference instead? */	794	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		795	downheap ((WT *)periodics, periodiccnt, 0);
387	}	796	}
		797	else
		798	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
388		799
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	800	event (EV_A_ (W)w, EV_PERIODIC);
390	}	801	}
391	}	802	}
392		803
393	static void	804	static void
394	time_update ()	805	periodics_reschedule (EV_P)
395	{	806	{
396	int i;	807	int i;
397	ev_now = ev_time ();
398		808
399	if (have_monotonic)	809	/* adjust periodics after time jump */
		810	for (i = 0; i < periodiccnt; ++i)
400	{	811	{
401	ev_tstamp odiff = diff;	812	struct ev_periodic *w = periodics [i];
402		813
403	/* detecting time jumps is much more difficult */	814	if (w->interval)
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */
405	{	815	{
406	now = get_clock ();	816	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
407	diff = ev_now - now;
408		817
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	818	if (fabs (diff) >= 1e-4)
410	return; /* all is well */	819	{
		820	ev_periodic_stop (EV_A_ w);
		821	ev_periodic_start (EV_A_ w);
411		822
412	ev_now = ev_time ();	823	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		824	}
413	}	825	}
		826	}
		827	}
414		828
415	/* time jump detected, reschedule atimers */	829	inline int
416	for (i = 0; i < atimercnt; ++i)	830	time_update_monotonic (EV_P)
		831	{
		832	mn_now = get_clock ();
		833
		834	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		835	{
		836	rt_now = rtmn_diff + mn_now;
		837	return 0;
		838	}
		839	else
		840	{
		841	now_floor = mn_now;
		842	rt_now = ev_time ();
		843	return 1;
		844	}
		845	}
		846
		847	static void
		848	time_update (EV_P)
		849	{
		850	int i;
		851
		852	#if EV_USE_MONOTONIC
		853	if (expect_true (have_monotonic))
		854	{
		855	if (time_update_monotonic (EV_A))
417	{	856	{
418	struct ev_timer *w = atimers [i];	857	ev_tstamp odiff = rtmn_diff;
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	858
		859	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		860	{
		861	rtmn_diff = rt_now - mn_now;
		862
		863	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		864	return; /* all is well */
		865
		866	rt_now = ev_time ();
		867	mn_now = get_clock ();
		868	now_floor = mn_now;
		869	}
		870
		871	periodics_reschedule (EV_A);
		872	/* no timer adjustment, as the monotonic clock doesn't jump */
		873	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
420	}	874	}
421	}	875	}
422	else	876	else
		877	#endif
423	{	878	{
424	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	879	rt_now = ev_time ();
425	/* time jump detected, adjust rtimers */	880
		881	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		882	{
		883	periodics_reschedule (EV_A);
		884
		885	/* adjust timers. this is easy, as the offset is the same for all */
426	for (i = 0; i < rtimercnt; ++i)	886	for (i = 0; i < timercnt; ++i)
427	rtimers [i]->at += ev_now - now;	887	timers [i]->at += rt_now - mn_now;
		888	}
428		889
429	now = ev_now;	890	mn_now = rt_now;
430	}	891	}
431	}	892	}
432		893
433	int ev_loop_done;	894	void
		895	ev_ref (EV_P)
		896	{
		897	++activecnt;
		898	}
434		899
		900	void
		901	ev_unref (EV_P)
		902	{
		903	--activecnt;
		904	}
		905
		906	static int loop_done;
		907
		908	void
435	void ev_loop (int flags)	909	ev_loop (EV_P_ int flags)
436	{	910	{
437	double block;	911	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	912	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
439		913
440	do	914	do
441	{	915	{
		916	/* queue check watchers (and execute them) */
		917	if (expect_false (preparecnt))
		918	{
		919	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		920	call_pending (EV_A);
		921	}
		922
442	/* update fd-related kernel structures */	923	/* update fd-related kernel structures */
443	fd_reify ();	924	fd_reify (EV_A);
444		925
445	/* calculate blocking time */	926	/* calculate blocking time */
		927
		928	/* we only need this for !monotonic clockor timers, but as we basically
		929	always have timers, we just calculate it always */
		930	#if EV_USE_MONOTONIC
		931	if (expect_true (have_monotonic))
		932	time_update_monotonic (EV_A);
		933	else
		934	#endif
		935	{
		936	rt_now = ev_time ();
		937	mn_now = rt_now;
		938	}
		939
446	if (flags & EVLOOP_NONBLOCK)	940	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
447	block = 0.;	941	block = 0.;
448	else	942	else
449	{	943	{
450	block = MAX_BLOCKTIME;	944	block = MAX_BLOCKTIME;
451		945
452	if (rtimercnt)	946	if (timercnt)
453	{	947	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	948	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
455	if (block > to) block = to;	949	if (block > to) block = to;
456	}	950	}
457		951
458	if (atimercnt)	952	if (periodiccnt)
459	{	953	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	954	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
461	if (block > to) block = to;	955	if (block > to) block = to;
462	}	956	}
463		957
464	if (block < 0.) block = 0.;	958	if (block < 0.) block = 0.;
465	}	959	}
466		960
467	method_poll (block);	961	method_poll (EV_A_ block);
468		962
469	/* update ev_now, do magic */	963	/* update rt_now, do magic */
470	time_update ();	964	time_update (EV_A);
471		965
472	/* put pending timers into pendign queue and reschedule them */	966	/* queue pending timers and reschedule them */
473	/* absolute timers first */	967	timers_reify (EV_A); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	968	periodics_reify (EV_A); /* absolute timers called first */
475	/* relative timers second */
476	timers_reify (rtimers, rtimercnt, now);
477		969
		970	/* queue idle watchers unless io or timers are pending */
		971	if (!pendingcnt)
		972	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		973
		974	/* queue check watchers, to be executed first */
		975	if (checkcnt)
		976	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		977
478	call_pending ();	978	call_pending (EV_A);
479	}	979	}
480	while (!ev_loop_done);	980	while (activecnt && !loop_done);
481	}
482		981
483	static void	982	if (loop_done != 2)
484	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	983	loop_done = 0;
		984	}
		985
		986	void
		987	ev_unloop (EV_P_ int how)
		988	{
		989	loop_done = how;
		990	}
		991
		992	/*****************************************************************************/
		993
		994	inline void
		995	wlist_add (WL *head, WL elem)
485	{	996	{
486	elem->next = *head;	997	elem->next = *head;
487	*head = elem;	998	*head = elem;
488	}	999	}
489		1000
490	static void	1001	inline void
491	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1002	wlist_del (WL *head, WL elem)
492	{	1003	{
493	while (*head)	1004	while (*head)
494	{	1005	{
495	if (*head == elem)	1006	if (*head == elem)
496	{	1007	{
…		…
500		1011
501	head = &(*head)->next;	1012	head = &(*head)->next;
502	}	1013	}
503	}	1014	}
504		1015
505	static void	1016	inline void
506	ev_start (struct ev_watcher *w, int active)	1017	ev_clear_pending (EV_P_ W w)
507	{	1018	{
		1019	if (w->pending)
		1020	{
		1021	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	w->pending = 0;	1022	w->pending = 0;
		1023	}
		1024	}
		1025
		1026	inline void
		1027	ev_start (EV_P_ W w, int active)
		1028	{
		1029	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1030	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1031
509	w->active = active;	1032	w->active = active;
		1033	ev_ref (EV_A);
510	}	1034	}
511		1035
512	static void	1036	inline void
513	ev_stop (struct ev_watcher *w)	1037	ev_stop (EV_P_ W w)
514	{	1038	{
515	if (w->pending)	1039	ev_unref (EV_A);
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	1040	w->active = 0;
519	/* nop */
520	}	1041	}
521		1042
		1043	/*****************************************************************************/
		1044
522	void	1045	void
523	evio_start (struct ev_io *w)	1046	ev_io_start (EV_P_ struct ev_io *w)
524	{	1047	{
		1048	int fd = w->fd;
		1049
525	if (ev_is_active (w))	1050	if (ev_is_active (w))
526	return;	1051	return;
527		1052
528	int fd = w->fd;	1053	assert (("ev_io_start called with negative fd", fd >= 0));
529		1054
530	ev_start ((struct ev_watcher *)w, 1);	1055	ev_start (EV_A_ (W)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1056	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	1057	wlist_add ((WL *)&anfds[fd].head, (WL)w);
533		1058
534	++fdchangecnt;	1059	fd_change (EV_A_ fd);
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}	1060	}
538		1061
539	void	1062	void
540	evio_stop (struct ev_io *w)	1063	ev_io_stop (EV_P_ struct ev_io *w)
541	{	1064	{
		1065	ev_clear_pending (EV_A_ (W)w);
542	if (!ev_is_active (w))	1066	if (!ev_is_active (w))
543	return;	1067	return;
544		1068
545	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	1069	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
546	ev_stop ((struct ev_watcher *)w);	1070	ev_stop (EV_A_ (W)w);
547		1071
548	++fdchangecnt;	1072	fd_change (EV_A_ w->fd);
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}	1073	}
552		1074
553	void	1075	void
554	evtimer_start (struct ev_timer *w)	1076	ev_timer_start (EV_P_ struct ev_timer *w)
555	{	1077	{
556	if (ev_is_active (w))	1078	if (ev_is_active (w))
557	return;	1079	return;
558		1080
559	if (w->is_abs)	1081	w->at += mn_now;
		1082
		1083	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1084
		1085	ev_start (EV_A_ (W)w, ++timercnt);
		1086	array_needsize (timers, timermax, timercnt, );
		1087	timers [timercnt - 1] = w;
		1088	upheap ((WT *)timers, timercnt - 1);
		1089	}
		1090
		1091	void
		1092	ev_timer_stop (EV_P_ struct ev_timer *w)
		1093	{
		1094	ev_clear_pending (EV_A_ (W)w);
		1095	if (!ev_is_active (w))
		1096	return;
		1097
		1098	if (w->active < timercnt--)
		1099	{
		1100	timers [w->active - 1] = timers [timercnt];
		1101	downheap ((WT *)timers, timercnt, w->active - 1);
560	{	1102	}
561	/* this formula differs from the one in timer_reify becuse we do not round up */	1103
		1104	w->at = w->repeat;
		1105
		1106	ev_stop (EV_A_ (W)w);
		1107	}
		1108
		1109	void
		1110	ev_timer_again (EV_P_ struct ev_timer *w)
		1111	{
		1112	if (ev_is_active (w))
		1113	{
562	if (w->repeat)	1114	if (w->repeat)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1115	{
564		1116	w->at = mn_now + w->repeat;
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	1117	downheap ((WT *)timers, timercnt, w->active - 1);
566	array_needsize (atimers, atimermax, atimercnt, );	1118	}
567	atimers [atimercnt - 1] = w;
568	upheap (atimers, atimercnt - 1);
569	}
570	else	1119	else
		1120	ev_timer_stop (EV_A_ w);
571	{	1121	}
572	w->at += now;	1122	else if (w->repeat)
573		1123	ev_timer_start (EV_A_ w);
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);
575	array_needsize (rtimers, rtimermax, rtimercnt, );
576	rtimers [rtimercnt - 1] = w;
577	upheap (rtimers, rtimercnt - 1);
578	}
579
580	}	1124	}
581		1125
582	void	1126	void
583	evtimer_stop (struct ev_timer *w)	1127	ev_periodic_start (EV_P_ struct ev_periodic *w)
584	{	1128	{
		1129	if (ev_is_active (w))
		1130	return;
		1131
		1132	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1133
		1134	/* this formula differs from the one in periodic_reify because we do not always round up */
		1135	if (w->interval)
		1136	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1137
		1138	ev_start (EV_A_ (W)w, ++periodiccnt);
		1139	array_needsize (periodics, periodicmax, periodiccnt, );
		1140	periodics [periodiccnt - 1] = w;
		1141	upheap ((WT *)periodics, periodiccnt - 1);
		1142	}
		1143
		1144	void
		1145	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1146	{
		1147	ev_clear_pending (EV_A_ (W)w);
585	if (!ev_is_active (w))	1148	if (!ev_is_active (w))
586	return;	1149	return;
587		1150
588	if (w->is_abs)
589	{
590	if (w->active < atimercnt--)	1151	if (w->active < periodiccnt--)
591	{
592	atimers [w->active - 1] = atimers [atimercnt];
593	downheap (atimers, atimercnt, w->active - 1);
594	}
595	}	1152	{
596	else	1153	periodics [w->active - 1] = periodics [periodiccnt];
		1154	downheap ((WT *)periodics, periodiccnt, w->active - 1);
597	{	1155	}
598	if (w->active < rtimercnt--)
599	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];
601	downheap (rtimers, rtimercnt, w->active - 1);
602	}
603	}
604		1156
605	ev_stop ((struct ev_watcher *)w);	1157	ev_stop (EV_A_ (W)w);
606	}	1158	}
607		1159
608	void	1160	void
609	evsignal_start (struct ev_signal *w)	1161	ev_idle_start (EV_P_ struct ev_idle *w)
610	{	1162	{
611	if (ev_is_active (w))	1163	if (ev_is_active (w))
612	return;	1164	return;
613		1165
614	ev_start ((struct ev_watcher *)w, 1);	1166	ev_start (EV_A_ (W)w, ++idlecnt);
		1167	array_needsize (idles, idlemax, idlecnt, );
		1168	idles [idlecnt - 1] = w;
		1169	}
		1170
		1171	void
		1172	ev_idle_stop (EV_P_ struct ev_idle *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (ev_is_active (w))
		1176	return;
		1177
		1178	idles [w->active - 1] = idles [--idlecnt];
		1179	ev_stop (EV_A_ (W)w);
		1180	}
		1181
		1182	void
		1183	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1184	{
		1185	if (ev_is_active (w))
		1186	return;
		1187
		1188	ev_start (EV_A_ (W)w, ++preparecnt);
		1189	array_needsize (prepares, preparemax, preparecnt, );
		1190	prepares [preparecnt - 1] = w;
		1191	}
		1192
		1193	void
		1194	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1195	{
		1196	ev_clear_pending (EV_A_ (W)w);
		1197	if (ev_is_active (w))
		1198	return;
		1199
		1200	prepares [w->active - 1] = prepares [--preparecnt];
		1201	ev_stop (EV_A_ (W)w);
		1202	}
		1203
		1204	void
		1205	ev_check_start (EV_P_ struct ev_check *w)
		1206	{
		1207	if (ev_is_active (w))
		1208	return;
		1209
		1210	ev_start (EV_A_ (W)w, ++checkcnt);
		1211	array_needsize (checks, checkmax, checkcnt, );
		1212	checks [checkcnt - 1] = w;
		1213	}
		1214
		1215	void
		1216	ev_check_stop (EV_P_ struct ev_check *w)
		1217	{
		1218	ev_clear_pending (EV_A_ (W)w);
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	checks [w->active - 1] = checks [--checkcnt];
		1223	ev_stop (EV_A_ (W)w);
		1224	}
		1225
		1226	#ifndef SA_RESTART
		1227	# define SA_RESTART 0
		1228	#endif
		1229
		1230	void
		1231	ev_signal_start (EV_P_ struct ev_signal *w)
		1232	{
		1233	#if EV_MULTIPLICITY
		1234	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1235	#endif
		1236	if (ev_is_active (w))
		1237	return;
		1238
		1239	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1240
		1241	ev_start (EV_A_ (W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	1242	array_needsize (signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1243	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		1244
618	if (!w->next)	1245	if (!w->next)
619	{	1246	{
620	struct sigaction sa;	1247	struct sigaction sa;
621	sa.sa_handler = sighandler;	1248	sa.sa_handler = sighandler;
622	sigfillset (&sa.sa_mask);	1249	sigfillset (&sa.sa_mask);
623	sa.sa_flags = 0;	1250	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
624	sigaction (w->signum, &sa, 0);	1251	sigaction (w->signum, &sa, 0);
625	}	1252	}
626	}	1253	}
627		1254
628	void	1255	void
629	evsignal_stop (struct ev_signal *w)	1256	ev_signal_stop (EV_P_ struct ev_signal *w)
630	{	1257	{
		1258	ev_clear_pending (EV_A_ (W)w);
631	if (!ev_is_active (w))	1259	if (!ev_is_active (w))
632	return;	1260	return;
633		1261
634	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1262	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	1263	ev_stop (EV_A_ (W)w);
636		1264
637	if (!signals [w->signum - 1].head)	1265	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	1266	signal (w->signum, SIG_DFL);
639	}	1267	}
640		1268
		1269	void
		1270	ev_child_start (EV_P_ struct ev_child *w)
		1271	{
		1272	#if EV_MULTIPLICITY
		1273	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1274	#endif
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	ev_start (EV_A_ (W)w, 1);
		1279	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1280	}
		1281
		1282	void
		1283	ev_child_stop (EV_P_ struct ev_child *w)
		1284	{
		1285	ev_clear_pending (EV_A_ (W)w);
		1286	if (ev_is_active (w))
		1287	return;
		1288
		1289	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1290	ev_stop (EV_A_ (W)w);
		1291	}
		1292
641	/*****************************************************************************/	1293	/*****************************************************************************/
642	#if 1
643		1294
644	static void	1295	struct ev_once
645	sin_cb (struct ev_io *w, int revents)
646	{	1296	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
648	}
649
650	static void
651	ocb (struct ev_timer *w, int revents)
652	{
653	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
654	evtimer_stop (w);
655	evtimer_start (w);
656	}
657
658	static void
659	scb (struct ev_signal *w, int revents)
660	{
661	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
662	}
663
664	int main (void)
665	{
666	struct ev_io sin;	1297	struct ev_io io;
667
668	ev_init (0);
669
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);
672	evio_start (&sin);
673
674	struct ev_timer t[10000];
675
676	#if 0
677	int i;
678	for (i = 0; i < 10000; ++i)
679	{
680	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);
683	evtimer_start (w);
684	if (drand48 () < 0.5)
685	evtimer_stop (w);
686	}
687	#endif
688
689	struct ev_timer t1;	1298	struct ev_timer to;
690	evw_init (&t1, ocb, 0);	1299	void (cb)(int revents, void arg);
691	evtimer_set_abs (&t1, 5, 10);	1300	void *arg;
692	evtimer_start (&t1);	1301	};
693		1302
694	struct ev_signal sig;	1303	static void
695	evw_init (&sig, scb, 65535);	1304	once_cb (EV_P_ struct ev_once *once, int revents)
696	evsignal_set (&sig, SIGQUIT);	1305	{
697	evsignal_start (&sig);	1306	void (cb)(int revents, void arg) = once->cb;
		1307	void *arg = once->arg;
698		1308
699	ev_loop (0);	1309	ev_io_stop (EV_A_ &once->io);
		1310	ev_timer_stop (EV_A_ &once->to);
		1311	free (once);
700		1312
701	return 0;	1313	cb (revents, arg);
702	}	1314	}
703		1315
704	#endif	1316	static void
		1317	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1318	{
		1319	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1320	}
705		1321
		1322	static void
		1323	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1324	{
		1325	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1326	}
706		1327
		1328	void
		1329	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1330	{
		1331	struct ev_once *once = malloc (sizeof (struct ev_once));
707		1332
		1333	if (!once)
		1334	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1335	else
		1336	{
		1337	once->cb = cb;
		1338	once->arg = arg;
708		1339
		1340	ev_watcher_init (&once->io, once_cb_io);
		1341	if (fd >= 0)
		1342	{
		1343	ev_io_set (&once->io, fd, events);
		1344	ev_io_start (EV_A_ &once->io);
		1345	}
		1346
		1347	ev_watcher_init (&once->to, once_cb_to);
		1348	if (timeout >= 0.)
		1349	{
		1350	ev_timer_set (&once->to, timeout, 0.);
		1351	ev_timer_start (EV_A_ &once->to);
		1352	}
		1353	}
		1354	}
		1355

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Comparing libev/ev.c (file contents): Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs. Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC