[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 1.64 by root, Sun Nov 4 23:14:11 2007 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
3	#include <unistd.h>	59	#include <unistd.h>
4	#include <fcntl.h>	60	#include <fcntl.h>
5	#include <signal.h>	61	#include <signal.h>
		62	#include <stddef.h>
6		63
7	#include <stdio.h>	64	#include <stdio.h>
8		65
9	#include <assert.h>	66	#include <assert.h>
10	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
11	#include <sys/time.h>	72	#include <sys/time.h>
12	#include <time.h>	73	#include <time.h>
13		74
		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	/*****************************************************************************/
		151
		152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
29	};	171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
30		174
31	struct ev_watcher_list {	175	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		176
35	static ev_tstamp now, diff; /* monotonic clock */	177	# define VAR(name,decl) static decl;
36	ev_tstamp ev_now;	178	# include "ev_vars.h"
37	int ev_method;	179	# undef VAR
38		180
39	static int have_monotonic; /* runtime */	181	#endif
40		182
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	183	/*****************************************************************************/
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		184
45	ev_tstamp	185	inline ev_tstamp
46	ev_time (void)	186	ev_time (void)
47	{	187	{
48	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
49	struct timespec ts;	189	struct timespec ts;
50	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
51	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
52	#else	192	#else
53	struct timeval tv;	193	struct timeval tv;
54	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
55	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
56	#endif	196	#endif
57	}	197	}
58		198
59	static ev_tstamp	199	inline ev_tstamp
60	get_clock (void)	200	get_clock (void)
61	{	201	{
62	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
63	if (have_monotonic)	203	if (expect_true (have_monotonic))
64	{	204	{
65	struct timespec ts;	205	struct timespec ts;
66	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
67	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
68	}	208	}
69	#endif	209	#endif
70		210
71	return ev_time ();	211	return ev_time ();
72	}	212	}
73		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		221
74	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
75	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
76	{ \	224	{ \
77	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
78	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	226	do \
		227	{ \
		228	newcnt = array_roundsize (base, newcnt << 1); \
		229	} \
		230	while ((cnt) > newcnt); \
		231	\
79	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
80	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
81	cur = newcnt; \	234	cur = newcnt; \
82	}	235	}
83		236
84	typedef struct	237	/*****************************************************************************/
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		238
96	static void	239	static void
97	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
98	{	241	{
99	while (count--)	242	while (count--)
100	{	243	{
101	base->head = 0;	244	base->head = 0;
102	base->wev = base->rev = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
103	++base;	248	++base;
104	}	249	}
105	}	250	}
106		251
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	252	static void
117	event (struct ev_watcher *w, int events)	253	event (EV_P_ W w, int events)
118	{	254	{
		255	if (w->pending)
		256	{
		257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		258	return;
		259	}
		260
119	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
120	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
121	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
122	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
123	}	265	}
124		266
125	static void	267	static void
		268	queue_events (EV_P_ W *events, int eventcnt, int type)
		269	{
		270	int i;
		271
		272	for (i = 0; i < eventcnt; ++i)
		273	event (EV_A_ events [i], type);
		274	}
		275
		276	static void
126	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
127	{	278	{
128	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
129	struct ev_io *w;	280	struct ev_io *w;
130		281
131	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
132	{	283	{
133	int ev = w->events & events;	284	int ev = w->events & events;
134		285
135	if (ev)	286	if (ev)
136	event ((struct ev_watcher *)w, ev);	287	event (EV_A_ (W)w, ev);
		288	}
		289	}
		290
		291	/*****************************************************************************/
		292
		293	static void
		294	fd_reify (EV_P)
		295	{
		296	int i;
		297
		298	for (i = 0; i < fdchangecnt; ++i)
		299	{
		300	int fd = fdchanges [i];
		301	ANFD *anfd = anfds + fd;
		302	struct ev_io *w;
		303
		304	int events = 0;
		305
		306	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		307	events \|= w->events;
		308
		309	anfd->reify = 0;
		310
		311	method_modify (EV_A_ fd, anfd->events, events);
		312	anfd->events = events;
		313	}
		314
		315	fdchangecnt = 0;
		316	}
		317
		318	static void
		319	fd_change (EV_P_ int fd)
		320	{
		321	if (anfds [fd].reify \|\| fdchangecnt < 0)
		322	return;
		323
		324	anfds [fd].reify = 1;
		325
		326	++fdchangecnt;
		327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		328	fdchanges [fdchangecnt - 1] = fd;
		329	}
		330
		331	static void
		332	fd_kill (EV_P_ int fd)
		333	{
		334	struct ev_io *w;
		335
		336	while ((w = (struct ev_io *)anfds [fd].head))
		337	{
		338	ev_io_stop (EV_A_ w);
		339	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		340	}
		341	}
		342
		343	/* called on EBADF to verify fds */
		344	static void
		345	fd_ebadf (EV_P)
		346	{
		347	int fd;
		348
		349	for (fd = 0; fd < anfdmax; ++fd)
		350	if (anfds [fd].events)
		351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		352	fd_kill (EV_A_ fd);
		353	}
		354
		355	/* called on ENOMEM in select/poll to kill some fds and retry */
		356	static void
		357	fd_enomem (EV_P)
		358	{
		359	int fd;
		360
		361	for (fd = anfdmax; fd--; )
		362	if (anfds [fd].events)
		363	{
		364	close (fd);
		365	fd_kill (EV_A_ fd);
		366	return;
137	}	367	}
138	}	368	}
139		369
140	static struct ev_timer **atimers;	370	/* 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	371	static void
147	upheap (struct ev_timer **timers, int k)	372	fd_rearm_all (EV_P)
148	{	373	{
149	struct ev_timer *w = timers [k];	374	int fd;
150		375
		376	/* this should be highly optimised to not do anything but set a flag */
		377	for (fd = 0; fd < anfdmax; ++fd)
		378	if (anfds [fd].events)
		379	{
		380	anfds [fd].events = 0;
		381	fd_change (EV_A_ fd);
		382	}
		383	}
		384
		385	/*****************************************************************************/
		386
		387	static void
		388	upheap (WT *heap, int k)
		389	{
		390	WT w = heap [k];
		391
151	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
152	{	393	{
153	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
154	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
155	k >>= 1;	396	k >>= 1;
156	}	397	}
157		398
158	timers [k] = w;	399	heap [k] = w;
159	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
160		401
161	}	402	}
162		403
163	static void	404	static void
164	downheap (struct ev_timer **timers, int N, int k)	405	downheap (WT *heap, int N, int k)
165	{	406	{
166	struct ev_timer *w = timers [k];	407	WT w = heap [k];
167		408
168	while (k < (N >> 1))	409	while (k < (N >> 1))
169	{	410	{
170	int j = k << 1;	411	int j = k << 1;
171		412
172	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
173	++j;	414	++j;
174		415
175	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
176	break;	417	break;
177		418
178	timers [k] = timers [j];	419	heap [k] = heap [j];
179	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
180	k = j;	421	k = j;
181	}	422	}
182		423
183	timers [k] = w;	424	heap [k] = w;
184	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
185	}	426	}
		427
		428	/*****************************************************************************/
186		429
187	typedef struct	430	typedef struct
188	{	431	{
189	struct ev_signal *head;	432	struct ev_watcher_list *head;
190	sig_atomic_t gotsig;	433	sig_atomic_t volatile gotsig;
191	} ANSIG;	434	} ANSIG;
192		435
193	static ANSIG *signals;	436	static ANSIG *signals;
194	static int signalmax;	437	static int signalmax;
195		438
196	static int sigpipe [2];	439	static int sigpipe [2];
197	static sig_atomic_t gotsig;	440	static sig_atomic_t volatile gotsig;
198	static struct ev_io sigev;	441	static struct ev_io sigev;
199		442
200	static void	443	static void
201	signals_init (ANSIG *base, int count)	444	signals_init (ANSIG *base, int count)
202	{	445	{
203	while (count--)	446	while (count--)
204	{	447	{
205	base->head = 0;	448	base->head = 0;
206	base->gotsig = 0;	449	base->gotsig = 0;
		450
207	++base;	451	++base;
208	}	452	}
209	}	453	}
210		454
211	static void	455	static void
213	{	457	{
214	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
215		459
216	if (!gotsig)	460	if (!gotsig)
217	{	461	{
		462	int old_errno = errno;
218	gotsig = 1;	463	gotsig = 1;
219	write (sigpipe [1], &gotsig, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
220	}	466	}
221	}	467	}
222		468
223	static void	469	static void
224	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
225	{	471	{
226	struct ev_signal *w;	472	struct ev_watcher_list *w;
227	int sig;	473	int signum;
228		474
		475	read (sigpipe [0], &revents, 1);
229	gotsig = 0;	476	gotsig = 0;
230	read (sigpipe [0], &revents, 1);
231		477
232	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
233	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
234	{	480	{
235	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
236		482
237	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
238	event ((struct ev_watcher *)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
239	}	485	}
240	}	486	}
241		487
242	static void	488	static void
243	siginit (void)	489	siginit (EV_P)
244	{	490	{
		491	#ifndef WIN32
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247		494
248	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
251		499
252	evio_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
254	}	503	}
255		504
		505	/*****************************************************************************/
		506
		507	#ifndef WIN32
		508
		509	static struct ev_child *childs [PID_HASHSIZE];
		510	static struct ev_signal childev;
		511
		512	#ifndef WCONTINUED
		513	# define WCONTINUED 0
		514	#endif
		515
		516	static void
		517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		518	{
		519	struct ev_child *w;
		520
		521	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		522	if (w->pid == pid \|\| !w->pid)
		523	{
		524	ev_priority (w) = ev_priority (sw); /* need to do it now */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
		534	int pid, status;
		535
		536	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		537	{
		538	/* make sure we are called again until all childs have been reaped */
		539	event (EV_A_ (W)sw, EV_SIGNAL);
		540
		541	child_reap (EV_A_ sw, pid, pid, status);
		542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
		544	}
		545
		546	#endif
		547
		548	/*****************************************************************************/
		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
256	#if HAVE_EPOLL	553	#if EV_USE_EPOLL
257	# include "ev_epoll.c"	554	# include "ev_epoll.c"
258	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
259	#if HAVE_SELECT	559	#if EV_USE_SELECT
260	# include "ev_select.c"	560	# include "ev_select.c"
261	#endif	561	#endif
262		562
263	int ev_init (int flags)	563	int
		564	ev_version_major (void)
264	{	565	{
		566	return EV_VERSION_MAJOR;
		567	}
		568
		569	int
		570	ev_version_minor (void)
		571	{
		572	return EV_VERSION_MINOR;
		573	}
		574
		575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
		578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	\|\| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	static void
		594	loop_init (EV_P_ int methods)
		595	{
		596	if (!method)
		597	{
265	#if HAVE_MONOTONIC	598	#if EV_USE_MONOTONIC
266	{	599	{
267	struct timespec ts;	600	struct timespec ts;
268	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269	have_monotonic = 1;	602	have_monotonic = 1;
270	}	603	}
271	#endif	604	#endif
272		605
273	ev_now = ev_time ();	606	rt_now = ev_time ();
274	now = get_clock ();	607	mn_now = get_clock ();
275	diff = ev_now - now;	608	now_floor = mn_now;
		609	rtmn_diff = rt_now - mn_now;
276		610
		611	if (methods == EVMETHOD_AUTO)
		612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
		615	methods = EVMETHOD_ANY;
		616
		617	method = 0;
		618	#if EV_USE_WIN32
		619	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		620	#endif
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_EPOLL
		625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_SELECT
		631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		632	#endif
		633	}
		634	}
		635
		636	void
		637	loop_destroy (EV_P)
		638	{
		639	#if EV_USE_WIN32
		640	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		647	#endif
		648	#if EV_USE_POLL
		649	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		653	#endif
		654
		655	method = 0;
		656	/TODO/
		657	}
		658
		659	void
		660	loop_fork (EV_P)
		661	{
		662	/TODO/
		663	#if EV_USE_EPOLL
		664	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		665	#endif
		666	#if EV_USE_KQUEUE
		667	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		668	#endif
		669	}
		670
		671	#if EV_MULTIPLICITY
		672	struct ev_loop *
		673	ev_loop_new (int methods)
		674	{
		675	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		676
		677	loop_init (EV_A_ methods);
		678
		679	if (ev_method (EV_A))
		680	return loop;
		681
		682	return 0;
		683	}
		684
		685	void
		686	ev_loop_destroy (EV_P)
		687	{
		688	loop_destroy (EV_A);
		689	free (loop);
		690	}
		691
		692	void
		693	ev_loop_fork (EV_P)
		694	{
		695	loop_fork (EV_A);
		696	}
		697
		698	#endif
		699
		700	#if EV_MULTIPLICITY
		701	struct ev_loop default_loop_struct;
		702	static struct ev_loop *default_loop;
		703
		704	struct ev_loop *
		705	#else
		706	static int default_loop;
		707
		708	int
		709	#endif
		710	ev_default_loop (int methods)
		711	{
		712	if (sigpipe [0] == sigpipe [1])
277	if (pipe (sigpipe))	713	if (pipe (sigpipe))
278	return 0;	714	return 0;
279		715
280	ev_method = EVMETHOD_NONE;	716	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	{	717	{
		718	#if EV_MULTIPLICITY
		719	struct ev_loop *loop = default_loop = &default_loop_struct;
		720	#else
		721	default_loop = 1;
		722	#endif
		723
		724	loop_init (EV_A_ methods);
		725
		726	if (ev_method (EV_A))
		727	{
290	evw_init (&sigev, sigcb, 0);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
291	siginit ();	730	siginit (EV_A);
292	}
293		731
294	return ev_method;	732	#ifndef WIN32
295	}	733	ev_signal_init (&childev, childcb, SIGCHLD);
296		734	ev_set_priority (&childev, EV_MAXPRI);
297	void ev_prefork (void)	735	ev_signal_start (EV_A_ &childev);
298	{	736	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	737	#endif
		738	}
		739	else
		740	default_loop = 0;
		741	}
311		742
		743	return default_loop;
		744	}
		745
		746	void
		747	ev_default_destroy (void)
		748	{
		749	#if EV_MULTIPLICITY
		750	struct ev_loop *loop = default_loop;
		751	#endif
		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
312	evio_stop (&sigev);	757	ev_io_stop (EV_A_ &sigev);
		758
		759	close (sigpipe [0]); sigpipe [0] = 0;
		760	close (sigpipe [1]); sigpipe [1] = 0;
		761
		762	loop_destroy (EV_A);
		763	}
		764
		765	void
		766	ev_default_fork (void)
		767	{
		768	#if EV_MULTIPLICITY
		769	struct ev_loop *loop = default_loop;
		770	#endif
		771
		772	loop_fork (EV_A);
		773
		774	ev_io_stop (EV_A_ &sigev);
313	close (sigpipe [0]);	775	close (sigpipe [0]);
314	close (sigpipe [1]);	776	close (sigpipe [1]);
315	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
316	siginit ();	780	siginit (EV_A);
317	}	781	}
318		782
		783	/*****************************************************************************/
		784
319	static void	785	static void
320	fd_reify (void)	786	call_pending (EV_P)
321	{	787	{
322	int i;	788	int pri;
323		789
324	for (i = 0; i < fdchangecnt; ++i)	790	for (pri = NUMPRI; pri--; )
325	{	791	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	{	792	{
337	method_modify (fd, anfd->wev, wev);	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
338	anfd->wev = wev;
339	}
340	}
341		794
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)	795	if (p->w)
355	{	796	{
356	p->w->pending = 0;	797	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	798
		799	((void (*)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
358	}	800	}
359	}	801	}
360
361	pendingcnt = 0;
362	}	802	}
363		803
364	static void	804	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	805	timers_reify (EV_P)
366	{	806	{
367	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
368	{	808	{
369	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
		810
		811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
370		812
371	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
372	if (w->repeat)	814	if (w->repeat)
373	{	815	{
374	if (w->is_abs)	816	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;	817	((WT)w)->at = mn_now + w->repeat;
378
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
382	}	819	}
383	else	820	else
		821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		822
		823	event (EV_A_ (W)w, EV_TIMEOUT);
		824	}
		825	}
		826
		827	static void
		828	periodics_reify (EV_P)
		829	{
		830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		831	{
		832	struct ev_periodic *w = periodics [0];
		833
		834	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		835
		836	/* first reschedule or stop timer */
		837	if (w->interval)
384	{	838	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	839	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
386	--timercnt; /* maybe pass by reference instead? */	840	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		841	downheap ((WT *)periodics, periodiccnt, 0);
387	}	842	}
		843	else
		844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
388		845
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	846	event (EV_A_ (W)w, EV_PERIODIC);
390	}	847	}
391	}	848	}
392		849
393	static void	850	static void
394	time_update ()	851	periodics_reschedule (EV_P)
395	{	852	{
396	int i;	853	int i;
397	ev_now = ev_time ();
398		854
399	if (have_monotonic)	855	/* adjust periodics after time jump */
		856	for (i = 0; i < periodiccnt; ++i)
400	{	857	{
401	ev_tstamp odiff = diff;	858	struct ev_periodic *w = periodics [i];
402		859
403	/* detecting time jumps is much more difficult */	860	if (w->interval)
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */
405	{	861	{
406	now = get_clock ();	862	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
407	diff = ev_now - now;
408		863
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	864	if (fabs (diff) >= 1e-4)
410	return; /* all is well */	865	{
		866	ev_periodic_stop (EV_A_ w);
		867	ev_periodic_start (EV_A_ w);
411		868
412	ev_now = ev_time ();	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		870	}
413	}	871	}
		872	}
		873	}
414		874
415	/* time jump detected, reschedule atimers */	875	inline int
416	for (i = 0; i < atimercnt; ++i)	876	time_update_monotonic (EV_P)
		877	{
		878	mn_now = get_clock ();
		879
		880	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		881	{
		882	rt_now = rtmn_diff + mn_now;
		883	return 0;
		884	}
		885	else
		886	{
		887	now_floor = mn_now;
		888	rt_now = ev_time ();
		889	return 1;
		890	}
		891	}
		892
		893	static void
		894	time_update (EV_P)
		895	{
		896	int i;
		897
		898	#if EV_USE_MONOTONIC
		899	if (expect_true (have_monotonic))
		900	{
		901	if (time_update_monotonic (EV_A))
417	{	902	{
418	struct ev_timer *w = atimers [i];	903	ev_tstamp odiff = rtmn_diff;
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
		907	rtmn_diff = rt_now - mn_now;
		908
		909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		910	return; /* all is well */
		911
		912	rt_now = ev_time ();
		913	mn_now = get_clock ();
		914	now_floor = mn_now;
		915	}
		916
		917	periodics_reschedule (EV_A);
		918	/* no timer adjustment, as the monotonic clock doesn't jump */
		919	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
420	}	920	}
421	}	921	}
422	else	922	else
		923	#endif
423	{	924	{
424	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	925	rt_now = ev_time ();
425	/* time jump detected, adjust rtimers */	926
		927	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		928	{
		929	periodics_reschedule (EV_A);
		930
		931	/* adjust timers. this is easy, as the offset is the same for all */
426	for (i = 0; i < rtimercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
427	rtimers [i]->at += ev_now - now;	933	((WT)timers [i])->at += rt_now - mn_now;
		934	}
428		935
429	now = ev_now;	936	mn_now = rt_now;
430	}	937	}
431	}	938	}
432		939
433	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
434		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
435	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
436	{	956	{
437	double block;	957	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	958	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
439		959
440	do	960	do
441	{	961	{
		962	/* queue check watchers (and execute them) */
		963	if (expect_false (preparecnt))
		964	{
		965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		966	call_pending (EV_A);
		967	}
		968
442	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
443	fd_reify ();	970	fd_reify (EV_A);
444		971
445	/* calculate blocking time */	972	/* calculate blocking time */
		973
		974	/* we only need this for !monotonic clockor timers, but as we basically
		975	always have timers, we just calculate it always */
		976	#if EV_USE_MONOTONIC
		977	if (expect_true (have_monotonic))
		978	time_update_monotonic (EV_A);
		979	else
		980	#endif
		981	{
		982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
		985
446	if (flags & EVLOOP_NONBLOCK)	986	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
447	block = 0.;	987	block = 0.;
448	else	988	else
449	{	989	{
450	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
451		991
452	if (rtimercnt)	992	if (timercnt)
453	{	993	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	994	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
455	if (block > to) block = to;	995	if (block > to) block = to;
456	}	996	}
457		997
458	if (atimercnt)	998	if (periodiccnt)
459	{	999	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
461	if (block > to) block = to;	1001	if (block > to) block = to;
462	}	1002	}
463		1003
464	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
465	}	1005	}
466		1006
467	method_poll (block);	1007	method_poll (EV_A_ block);
468		1008
469	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
470	time_update ();	1010	time_update (EV_A);
471		1011
472	/* put pending timers into pendign queue and reschedule them */	1012	/* queue pending timers and reschedule them */
473	/* absolute timers first */	1013	timers_reify (EV_A); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	1014	periodics_reify (EV_A); /* absolute timers called first */
475	/* relative timers second */
476	timers_reify (rtimers, rtimercnt, now);
477		1015
		1016	/* queue idle watchers unless io or timers are pending */
		1017	if (!pendingcnt)
		1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1019
		1020	/* queue check watchers, to be executed first */
		1021	if (checkcnt)
		1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1023
478	call_pending ();	1024	call_pending (EV_A);
479	}	1025	}
480	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
481	}
482		1027
483	static void	1028	if (loop_done != 2)
484	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
		1036	}
		1037
		1038	/*****************************************************************************/
		1039
		1040	inline void
		1041	wlist_add (WL *head, WL elem)
485	{	1042	{
486	elem->next = *head;	1043	elem->next = *head;
487	*head = elem;	1044	*head = elem;
488	}	1045	}
489		1046
490	static void	1047	inline void
491	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1048	wlist_del (WL *head, WL elem)
492	{	1049	{
493	while (*head)	1050	while (*head)
494	{	1051	{
495	if (*head == elem)	1052	if (*head == elem)
496	{	1053	{
…		…
500		1057
501	head = &(*head)->next;	1058	head = &(*head)->next;
502	}	1059	}
503	}	1060	}
504		1061
505	static void	1062	inline void
506	ev_start (struct ev_watcher *w, int active)	1063	ev_clear_pending (EV_P_ W w)
507	{	1064	{
		1065	if (w->pending)
		1066	{
		1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	w->pending = 0;	1068	w->pending = 0;
		1069	}
		1070	}
		1071
		1072	inline void
		1073	ev_start (EV_P_ W w, int active)
		1074	{
		1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
509	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
510	}	1080	}
511		1081
512	static void	1082	inline void
513	ev_stop (struct ev_watcher *w)	1083	ev_stop (EV_P_ W w)
514	{	1084	{
515	if (w->pending)	1085	ev_unref (EV_A);
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	1086	w->active = 0;
519	/* nop */
520	}	1087	}
521		1088
		1089	/*****************************************************************************/
		1090
522	void	1091	void
523	evio_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
524	{	1093	{
		1094	int fd = w->fd;
		1095
525	if (ev_is_active (w))	1096	if (ev_is_active (w))
526	return;	1097	return;
527		1098
528	int fd = w->fd;	1099	assert (("ev_io_start called with negative fd", fd >= 0));
529		1100
530	ev_start ((struct ev_watcher *)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
533		1104
534	++fdchangecnt;	1105	fd_change (EV_A_ fd);
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}	1106	}
538		1107
539	void	1108	void
540	evio_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
541	{	1110	{
		1111	ev_clear_pending (EV_A_ (W)w);
542	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
543	return;	1113	return;
544		1114
545	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
546	ev_stop ((struct ev_watcher *)w);	1116	ev_stop (EV_A_ (W)w);
547		1117
548	++fdchangecnt;	1118	fd_change (EV_A_ w->fd);
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}	1119	}
552		1120
553	void	1121	void
554	evtimer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
555	{	1123	{
556	if (ev_is_active (w))	1124	if (ev_is_active (w))
557	return;	1125	return;
558		1126
559	if (w->is_abs)	1127	((WT)w)->at += mn_now;
		1128
		1129	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1130
		1131	ev_start (EV_A_ (W)w, ++timercnt);
		1132	array_needsize (timers, timermax, timercnt, );
		1133	timers [timercnt - 1] = w;
		1134	upheap ((WT *)timers, timercnt - 1);
		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
		1139	void
		1140	ev_timer_stop (EV_P_ struct ev_timer *w)
		1141	{
		1142	ev_clear_pending (EV_A_ (W)w);
		1143	if (!ev_is_active (w))
		1144	return;
		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
		1148	if (((W)w)->active < timercnt--)
		1149	{
		1150	timers [((W)w)->active - 1] = timers [timercnt];
		1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
560	{	1152	}
561	/* this formula differs from the one in timer_reify becuse we do not round up */	1153
		1154	((WT)w)->at = w->repeat;
		1155
		1156	ev_stop (EV_A_ (W)w);
		1157	}
		1158
		1159	void
		1160	ev_timer_again (EV_P_ struct ev_timer *w)
		1161	{
		1162	if (ev_is_active (w))
		1163	{
562	if (w->repeat)	1164	if (w->repeat)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1165	{
564		1166	((WT)w)->at = mn_now + w->repeat;
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
566	array_needsize (atimers, atimermax, atimercnt, );	1168	}
567	atimers [atimercnt - 1] = w;
568	upheap (atimers, atimercnt - 1);
569	}
570	else	1169	else
		1170	ev_timer_stop (EV_A_ w);
571	{	1171	}
572	w->at += now;	1172	else if (w->repeat)
573		1173	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	}	1174	}
581		1175
582	void	1176	void
583	evtimer_stop (struct ev_timer *w)	1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
584	{	1178	{
		1179	if (ev_is_active (w))
		1180	return;
		1181
		1182	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1183
		1184	/* this formula differs from the one in periodic_reify because we do not always round up */
		1185	if (w->interval)
		1186	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1187
		1188	ev_start (EV_A_ (W)w, ++periodiccnt);
		1189	array_needsize (periodics, periodicmax, periodiccnt, );
		1190	periodics [periodiccnt - 1] = w;
		1191	upheap ((WT *)periodics, periodiccnt - 1);
		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
		1196	void
		1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1198	{
		1199	ev_clear_pending (EV_A_ (W)w);
585	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
586	return;	1201	return;
587		1202
588	if (w->is_abs)	1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
589	{	1204
590	if (w->active < atimercnt--)	1205	if (((W)w)->active < periodiccnt--)
591	{
592	atimers [w->active - 1] = atimers [atimercnt];
593	downheap (atimers, atimercnt, w->active - 1);
594	}
595	}	1206	{
596	else	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
597	{	1209	}
598	if (w->active < rtimercnt--)
599	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];
601	downheap (rtimers, rtimercnt, w->active - 1);
602	}
603	}
604		1210
605	ev_stop ((struct ev_watcher *)w);	1211	ev_stop (EV_A_ (W)w);
606	}	1212	}
607		1213
608	void	1214	void
609	evsignal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
610	{	1216	{
611	if (ev_is_active (w))	1217	if (ev_is_active (w))
612	return;	1218	return;
613		1219
614	ev_start ((struct ev_watcher *)w, 1);	1220	ev_start (EV_A_ (W)w, ++idlecnt);
		1221	array_needsize (idles, idlemax, idlecnt, );
		1222	idles [idlecnt - 1] = w;
		1223	}
		1224
		1225	void
		1226	ev_idle_stop (EV_P_ struct ev_idle *w)
		1227	{
		1228	ev_clear_pending (EV_A_ (W)w);
		1229	if (ev_is_active (w))
		1230	return;
		1231
		1232	idles [((W)w)->active - 1] = idles [--idlecnt];
		1233	ev_stop (EV_A_ (W)w);
		1234	}
		1235
		1236	void
		1237	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1238	{
		1239	if (ev_is_active (w))
		1240	return;
		1241
		1242	ev_start (EV_A_ (W)w, ++preparecnt);
		1243	array_needsize (prepares, preparemax, preparecnt, );
		1244	prepares [preparecnt - 1] = w;
		1245	}
		1246
		1247	void
		1248	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1249	{
		1250	ev_clear_pending (EV_A_ (W)w);
		1251	if (ev_is_active (w))
		1252	return;
		1253
		1254	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1255	ev_stop (EV_A_ (W)w);
		1256	}
		1257
		1258	void
		1259	ev_check_start (EV_P_ struct ev_check *w)
		1260	{
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	ev_start (EV_A_ (W)w, ++checkcnt);
		1265	array_needsize (checks, checkmax, checkcnt, );
		1266	checks [checkcnt - 1] = w;
		1267	}
		1268
		1269	void
		1270	ev_check_stop (EV_P_ struct ev_check *w)
		1271	{
		1272	ev_clear_pending (EV_A_ (W)w);
		1273	if (ev_is_active (w))
		1274	return;
		1275
		1276	checks [((W)w)->active - 1] = checks [--checkcnt];
		1277	ev_stop (EV_A_ (W)w);
		1278	}
		1279
		1280	#ifndef SA_RESTART
		1281	# define SA_RESTART 0
		1282	#endif
		1283
		1284	void
		1285	ev_signal_start (EV_P_ struct ev_signal *w)
		1286	{
		1287	#if EV_MULTIPLICITY
		1288	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1289	#endif
		1290	if (ev_is_active (w))
		1291	return;
		1292
		1293	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1294
		1295	ev_start (EV_A_ (W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	1296	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);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		1298
618	if (!w->next)	1299	if (!((WL)w)->next)
619	{	1300	{
620	struct sigaction sa;	1301	struct sigaction sa;
621	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
622	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
623	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
624	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
625	}	1306	}
626	}	1307	}
627		1308
628	void	1309	void
629	evsignal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
630	{	1311	{
		1312	ev_clear_pending (EV_A_ (W)w);
631	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
632	return;	1314	return;
633		1315
634	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	1317	ev_stop (EV_A_ (W)w);
636		1318
637	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
639	}	1321	}
640		1322
		1323	void
		1324	ev_child_start (EV_P_ struct ev_child *w)
		1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
		1329	if (ev_is_active (w))
		1330	return;
		1331
		1332	ev_start (EV_A_ (W)w, 1);
		1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1334	}
		1335
		1336	void
		1337	ev_child_stop (EV_P_ struct ev_child *w)
		1338	{
		1339	ev_clear_pending (EV_A_ (W)w);
		1340	if (ev_is_active (w))
		1341	return;
		1342
		1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1344	ev_stop (EV_A_ (W)w);
		1345	}
		1346
641	/*****************************************************************************/	1347	/*****************************************************************************/
642	#if 1
643		1348
644	static void	1349	struct ev_once
645	sin_cb (struct ev_io *w, int revents)
646	{	1350	{
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;	1351	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;	1352	struct ev_timer to;
690	evw_init (&t1, ocb, 0);	1353	void (cb)(int revents, void arg);
691	evtimer_set_abs (&t1, 5, 10);	1354	void *arg;
692	evtimer_start (&t1);	1355	};
693		1356
694	struct ev_signal sig;	1357	static void
695	evw_init (&sig, scb, 65535);	1358	once_cb (EV_P_ struct ev_once *once, int revents)
696	evsignal_set (&sig, SIGQUIT);	1359	{
697	evsignal_start (&sig);	1360	void (cb)(int revents, void arg) = once->cb;
		1361	void *arg = once->arg;
698		1362
699	ev_loop (0);	1363	ev_io_stop (EV_A_ &once->io);
		1364	ev_timer_stop (EV_A_ &once->to);
		1365	free (once);
700		1366
701	return 0;	1367	cb (revents, arg);
702	}	1368	}
703		1369
704	#endif	1370	static void
		1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1372	{
		1373	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1374	}
705		1375
		1376	static void
		1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1378	{
		1379	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1380	}
706		1381
		1382	void
		1383	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1384	{
		1385	struct ev_once *once = malloc (sizeof (struct ev_once));
707		1386
		1387	if (!once)
		1388	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1389	else
		1390	{
		1391	once->cb = cb;
		1392	once->arg = arg;
708		1393
		1394	ev_watcher_init (&once->io, once_cb_io);
		1395	if (fd >= 0)
		1396	{
		1397	ev_io_set (&once->io, fd, events);
		1398	ev_io_start (EV_A_ &once->io);
		1399	}
		1400
		1401	ev_watcher_init (&once->to, once_cb_to);
		1402	if (timeout >= 0.)
		1403	{
		1404	ev_timer_set (&once->to, timeout, 0.);
		1405	ev_timer_start (EV_A_ &once->to);
		1406	}
		1407	}
		1408	}
		1409

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Comparing libev/ev.c (file contents): Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs. Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC