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Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.60 by root, Sun Nov 4 18:29:44 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
3	#include <unistd.h>	59	#include <unistd.h>
4	#include <fcntl.h>	60	#include <fcntl.h>
5	#include <signal.h>	61	#include <signal.h>
		62	#include <stddef.h>
6		63
7	#include <stdio.h>	64	#include <stdio.h>
8		65
9	#include <assert.h>	66	#include <assert.h>
10	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
11	#include <sys/time.h>	72	#include <sys/time.h>
12	#include <time.h>	73	#include <time.h>
13		74
14	#define HAVE_EPOLL 1	75	/**/
15		76
16	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
		78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_REALTIME
		98	# define EV_USE_REALTIME 1
		99	#endif
		100
		101	/**/
		102
17	# ifdef CLOCK_MONOTONIC	103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
18	# define HAVE_MONOTONIC 1	105	# define EV_USE_MONOTONIC 0
19	# endif	106	#endif
20	#endif
21		107
22	#ifndef HAVE_SELECT
23	# define HAVE_SELECT 1
24	#endif
25
26	#ifndef HAVE_EPOLL
27	# define HAVE_EPOLL 0
28	#endif
29
30	#ifndef HAVE_REALTIME	108	#ifndef CLOCK_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
32	#endif	111	#endif
		112
		113	/**/
33		114
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	116	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		117	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		118	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
36		119
37	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
38		135
39	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
42		139
43	static ev_tstamp now, diff; /* monotonic clock */	140	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
44	ev_tstamp ev_now;
45	int ev_method;
46
47	static int have_monotonic; /* runtime */
48
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		141
53	/*****************************************************************************/	142	/*****************************************************************************/
54		143
55	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
56	ev_time (void)	178	ev_time (void)
57	{	179	{
58	#if HAVE_REALTIME	180	#if EV_USE_REALTIME
59	struct timespec ts;	181	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	183	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	184	#else
63	struct timeval tv;	185	struct timeval tv;
64	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	188	#endif
67	}	189	}
68		190
69	static ev_tstamp	191	inline ev_tstamp
70	get_clock (void)	192	get_clock (void)
71	{	193	{
72	#if HAVE_MONOTONIC	194	#if EV_USE_MONOTONIC
73	if (have_monotonic)	195	if (expect_true (have_monotonic))
74	{	196	{
75	struct timespec ts;	197	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	200	}
79	#endif	201	#endif
80		202
81	return ev_time ();	203	return ev_time ();
82	}	204	}
83		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
		212	#define array_roundsize(base,n) ((n) | 4 & ~3)
		213
84	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
85	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
86	{ \	216	{ \
87	int newcnt = cur ? cur << 1 : 16; \	217	int newcnt = cur; \
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	218	do \
		219	{ \
		220	newcnt = array_roundsize (base, newcnt << 1); \
		221	} \
		222	while ((cnt) > newcnt); \
		223	\
89	base = realloc (base, sizeof (*base) * (newcnt)); \	224	base = realloc (base, sizeof (*base) * (newcnt)); \
90	init (base + cur, newcnt - cur); \	225	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	226	cur = newcnt; \
92	}	227	}
93		228
94	/*****************************************************************************/	229	/*****************************************************************************/
95		230
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	231	static void
109	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
110	{	233	{
111	while (count--)	234	while (count--)
112	{	235	{
113	base->head = 0;	236	base->head = 0;
114	base->wev = base->rev = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
115	++base;	240	++base;
116	}	241	}
117	}	242	}
118		243
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void	244	static void
129	event (W w, int events)	245	event (EV_P_ W w, int events)
130	{	246	{
		247	if (w->pending)
		248	{
		249	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		250	return;
		251	}
		252
131	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
132	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
133	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
134	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
135	}	257	}
136		258
137	static void	259	static void
		260	queue_events (EV_P_ W *events, int eventcnt, int type)
		261	{
		262	int i;
		263
		264	for (i = 0; i < eventcnt; ++i)
		265	event (EV_A_ events [i], type);
		266	}
		267
		268	static void
138	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
139	{	270	{
140	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
141	struct ev_io *w;	272	struct ev_io *w;
142		273
143	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
144	{	275	{
145	int ev = w->events & events;	276	int ev = w->events & events;
146		277
147	if (ev)	278	if (ev)
148	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
149	}	280	}
150	}	281	}
151		282
		283	/*****************************************************************************/
		284
152	static void	285	static void
153	queue_events (W *events, int eventcnt, int type)	286	fd_reify (EV_P)
154	{	287	{
155	int i;	288	int i;
156		289
157	for (i = 0; i < eventcnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
158	event (events [i], type);	291	{
		292	int fd = fdchanges [i];
		293	ANFD *anfd = anfds + fd;
		294	struct ev_io *w;
		295
		296	int events = 0;
		297
		298	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		299	events |= w->events;
		300
		301	anfd->reify = 0;
		302
		303	if (anfd->events != events)
		304	{
		305	method_modify (EV_A_ fd, anfd->events, events);
		306	anfd->events = events;
		307	}
		308	}
		309
		310	fdchangecnt = 0;
		311	}
		312
		313	static void
		314	fd_change (EV_P_ int fd)
		315	{
		316	if (anfds [fd].reify || fdchangecnt < 0)
		317	return;
		318
		319	anfds [fd].reify = 1;
		320
		321	++fdchangecnt;
		322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		323	fdchanges [fdchangecnt - 1] = fd;
		324	}
		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		335	}
		336	}
		337
		338	/* called on EBADF to verify fds */
		339	static void
		340	fd_ebadf (EV_P)
		341	{
		342	int fd;
		343
		344	for (fd = 0; fd < anfdmax; ++fd)
		345	if (anfds [fd].events)
		346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
		358	{
		359	close (fd);
		360	fd_kill (EV_A_ fd);
		361	return;
		362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
159	}	378	}
160		379
161	/*****************************************************************************/	380	/*****************************************************************************/
162		381
163	static struct ev_timer **timers;
164	static int timermax, timercnt;
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void	382	static void
170	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
171	{	384	{
172	WT w = timers [k];	385	WT w = heap [k];
173		386
174	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
175	{	388	{
176	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
177	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
178	k >>= 1;	391	k >>= 1;
179	}	392	}
180		393
181	timers [k] = w;	394	heap [k] = w;
182	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
183		396
184	}	397	}
185		398
186	static void	399	static void
187	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
188	{	401	{
189	WT w = timers [k];	402	WT w = heap [k];
190		403
191	while (k < (N >> 1))	404	while (k < (N >> 1))
192	{	405	{
193	int j = k << 1;	406	int j = k << 1;
194		407
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
196	++j;	409	++j;
197		410
198	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
199	break;	412	break;
200		413
201	timers [k] = timers [j];	414	heap [k] = heap [j];
202	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
203	k = j;	416	k = j;
204	}	417	}
205		418
206	timers [k] = w;	419	heap [k] = w;
207	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
208	}	421	}
209		422
210	/*****************************************************************************/	423	/*****************************************************************************/
211		424
212	typedef struct	425	typedef struct
213	{	426	{
214	struct ev_signal *head;	427	struct ev_watcher_list *head;
215	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
216	} ANSIG;	429	} ANSIG;
217		430
218	static ANSIG *signals;	431	static ANSIG *signals;
219	static int signalmax;	432	static int signalmax;
220		433
221	static int sigpipe [2];	434	static int sigpipe [2];
222	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
223	static struct ev_io sigev;	436	static struct ev_io sigev;
224		437
225	static void	438	static void
226	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
227	{	440	{
228	while (count--)	441	while (count--)
229	{	442	{
230	base->head = 0;	443	base->head = 0;
231	base->gotsig = 0;	444	base->gotsig = 0;
		445
232	++base;	446	++base;
233	}	447	}
234	}	448	}
235		449
236	static void	450	static void
…		…
238	{	452	{
239	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
240		454
241	if (!gotsig)	455	if (!gotsig)
242	{	456	{
		457	int old_errno = errno;
243	gotsig = 1;	458	gotsig = 1;
244	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
245	}	461	}
246	}	462	}
247		463
248	static void	464	static void
249	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
250	{	466	{
251	struct ev_signal *w;	467	struct ev_watcher_list *w;
252	int sig;	468	int signum;
253		469
		470	read (sigpipe [0], &revents, 1);
254	gotsig = 0;	471	gotsig = 0;
255	read (sigpipe [0], &revents, 1);
256		472
257	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
258	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
259	{	475	{
260	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
261		477
262	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
263	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
264	}	480	}
265	}	481	}
266		482
267	static void	483	static void
268	siginit (void)	484	siginit (EV_P)
269	{	485	{
		486	#ifndef WIN32
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272		489
273	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
276		494
277	evio_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
278	evio_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
279	}	498	}
280		499
281	/*****************************************************************************/	500	/*****************************************************************************/
282		501
283	static struct ev_idle **idles;	502	#ifndef WIN32
284	static int idlemax, idlecnt;
285		503
286	static struct ev_check **checks;	504	static struct ev_child *childs [PID_HASHSIZE];
287	static int checkmax, checkcnt;	505	static struct ev_signal childev;
		506
		507	#ifndef WCONTINUED
		508	# define WCONTINUED 0
		509	#endif
		510
		511	static void
		512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		513	{
		514	struct ev_child *w;
		515
		516	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		517	if (w->pid == pid || !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it *now* */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
		529	int pid, status;
		530
		531	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		532	{
		533	/* make sure we are called again until all childs have been reaped */
		534	event (EV_A_ (W)sw, EV_SIGNAL);
		535
		536	child_reap (EV_A_ sw, pid, pid, status);
		537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
		539	}
		540
		541	#endif
288		542
289	/*****************************************************************************/	543	/*****************************************************************************/
290		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
291	#if HAVE_EPOLL	548	#if EV_USE_EPOLL
292	# include "ev_epoll.c"	549	# include "ev_epoll.c"
293	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
294	#if HAVE_SELECT	554	#if EV_USE_SELECT
295	# include "ev_select.c"	555	# include "ev_select.c"
296	#endif	556	#endif
297		557
298	int ev_init (int flags)	558	int
		559	ev_version_major (void)
299	{	560	{
		561	return EV_VERSION_MAJOR;
		562	}
		563
		564	int
		565	ev_version_minor (void)
		566	{
		567	return EV_VERSION_MINOR;
		568	}
		569
		570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
		573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	|| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
		591	if (!method)
		592	{
300	#if HAVE_MONOTONIC	593	#if EV_USE_MONOTONIC
301	{	594	{
302	struct timespec ts;	595	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;	597	have_monotonic = 1;
305	}	598	}
306	#endif	599	#endif
307		600
308	ev_now = ev_time ();	601	rt_now = ev_time ();
309	now = get_clock ();	602	mn_now = get_clock ();
310	diff = ev_now - now;	603	now_floor = mn_now;
		604	rtmn_diff = rt_now - mn_now;
311		605
		606	if (methods == EVMETHOD_AUTO)
		607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
		610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
		616	#if EV_USE_EPOLL
		617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		621	#endif
		622	#if EV_USE_SELECT
		623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		624	#endif
		625	}
		626	}
		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/*TODO*/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/*TODO*/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
312	if (pipe (sigpipe))	702	if (pipe (sigpipe))
313	return 0;	703	return 0;
314		704
315	ev_method = EVMETHOD_NONE;	705	if (!default_loop)
316	#if HAVE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322
323	if (ev_method)
324	{	706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
		715	if (ev_method (EV_A))
		716	{
325	evw_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
326	siginit ();	719	siginit (EV_A);
327	}
328		720
329	return ev_method;	721	#ifndef WIN32
330	}	722	ev_signal_init (&childev, childcb, SIGCHLD);
331		723	ev_set_priority (&childev, EV_MAXPRI);
332	/*****************************************************************************/	724	ev_signal_start (EV_A_ &childev);
333		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	void ev_prefork (void)
335	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif	726	#endif
		727	}
		728	else
		729	default_loop = 0;
		730	}
350		731
		732	return default_loop;
		733	}
		734
		735	void
		736	ev_default_destroy (void)
		737	{
		738	#if EV_MULTIPLICITY
		739	struct ev_loop *loop = default_loop;
		740	#endif
		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
351	evio_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
352	close (sigpipe [0]);	764	close (sigpipe [0]);
353	close (sigpipe [1]);	765	close (sigpipe [1]);
354	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
355	siginit ();	769	siginit (EV_A);
356	}	770	}
357		771
358	/*****************************************************************************/	772	/*****************************************************************************/
359		773
360	static void	774	static void
361	fd_reify (void)	775	call_pending (EV_P)
362	{	776	{
363	int i;	777	int pri;
364		778
365	for (i = 0; i < fdchangecnt; ++i)	779	for (pri = NUMPRI; pri--; )
366	{	780	while (pendingcnt [pri])
367	int fd = fdchanges [i];
368	ANFD *anfd = anfds + fd;
369	struct ev_io *w;
370
371	int wev = 0;
372
373	for (w = anfd->head; w; w = w->next)
374	wev |= w->events;
375
376	if (anfd->wev != wev)
377	{	781	{
378	method_modify (fd, anfd->wev, wev);	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
379	anfd->wev = wev;
380	}
381	}
382		783
383	fdchangecnt = 0;
384	}
385
386	static void
387	call_pending ()
388	{
389	int i;
390
391	for (i = 0; i < pendingcnt; ++i)
392	{
393	ANPENDING *p = pendings + i;
394
395	if (p->w)	784	if (p->w)
396	{	785	{
397	p->w->pending = 0;	786	p->w->pending = 0;
398	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
399	}	788	}
400	}	789	}
401
402	pendingcnt = 0;
403	}	790	}
404		791
405	static void	792	static void
406	timers_reify ()	793	timers_reify (EV_P)
407	{	794	{
408	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
409	{	796	{
410	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
411		798
412	/* first reschedule or stop timer */	799	/* first reschedule or stop timer */
413	if (w->repeat)	800	if (w->repeat)
414	{	801	{
		802	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
415	w->at = now + w->repeat;	803	w->at = mn_now + w->repeat;
416	assert (("timer timeout in the past, negative repeat?", w->at > now));
417	downheap ((WT *)timers, timercnt, 0);	804	downheap ((WT *)timers, timercnt, 0);
418	}	805	}
419	else	806	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	807	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		808
422	event ((W)w, EV_TIMEOUT);	809	event (EV_A_ (W)w, EV_TIMEOUT);
423	}	810	}
424	}	811	}
425		812
426	static void	813	static void
427	periodics_reify ()	814	periodics_reify (EV_P)
428	{	815	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	816	while (periodiccnt && periodics [0]->at <= rt_now)
430	{	817	{
431	struct ev_periodic *w = periodics [0];	818	struct ev_periodic *w = periodics [0];
432		819
433	/* first reschedule or stop timer */	820	/* first reschedule or stop timer */
434	if (w->interval)	821	if (w->interval)
435	{	822	{
436	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	823	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
437	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	824	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
438	downheap ((WT *)periodics, periodiccnt, 0);	825	downheap ((WT *)periodics, periodiccnt, 0);
439	}	826	}
440	else	827	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	828	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		829
443	event ((W)w, EV_TIMEOUT);	830	event (EV_A_ (W)w, EV_PERIODIC);
444	}	831	}
445	}	832	}
446		833
447	static void	834	static void
448	periodics_reschedule (ev_tstamp diff)	835	periodics_reschedule (EV_P)
449	{	836	{
450	int i;	837	int i;
451		838
452	/* adjust periodics after time jump */	839	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	840	for (i = 0; i < periodiccnt; ++i)
454	{	841	{
455	struct ev_periodic *w = periodics [i];	842	struct ev_periodic *w = periodics [i];
456		843
457	if (w->interval)	844	if (w->interval)
458	{	845	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	846	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
460		847
461	if (fabs (diff) >= 1e-4)	848	if (fabs (diff) >= 1e-4)
462	{	849	{
463	evperiodic_stop (w);	850	ev_periodic_stop (EV_A_ w);
464	evperiodic_start (w);	851	ev_periodic_start (EV_A_ w);
465		852
466	i = 0; /* restart loop, inefficient, but time jumps should be rare */	853	i = 0; /* restart loop, inefficient, but time jumps should be rare */
467	}	854	}
468	}	855	}
469	}	856	}
470	}	857	}
471		858
		859	inline int
		860	time_update_monotonic (EV_P)
		861	{
		862	mn_now = get_clock ();
		863
		864	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		865	{
		866	rt_now = rtmn_diff + mn_now;
		867	return 0;
		868	}
		869	else
		870	{
		871	now_floor = mn_now;
		872	rt_now = ev_time ();
		873	return 1;
		874	}
		875	}
		876
472	static void	877	static void
473	time_update ()	878	time_update (EV_P)
474	{	879	{
475	int i;	880	int i;
476		881
477	ev_now = ev_time ();	882	#if EV_USE_MONOTONIC
478
479	if (have_monotonic)	883	if (expect_true (have_monotonic))
480	{	884	{
481	ev_tstamp odiff = diff;	885	if (time_update_monotonic (EV_A))
482
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */
484	{	886	{
485	now = get_clock ();	887	ev_tstamp odiff = rtmn_diff;
		888
		889	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		890	{
486	diff = ev_now - now;	891	rtmn_diff = rt_now - mn_now;
487		892
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)	893	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
489	return; /* all is well */	894	return; /* all is well */
490		895
491	ev_now = ev_time ();	896	rt_now = ev_time ();
		897	mn_now = get_clock ();
		898	now_floor = mn_now;
		899	}
		900
		901	periodics_reschedule (EV_A);
		902	/* no timer adjustment, as the monotonic clock doesn't jump */
		903	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
492	}	904	}
493
494	periodics_reschedule (diff - odiff);
495	/* no timer adjustment, as the monotonic clock doesn't jump */
496	}	905	}
497	else	906	else
		907	#endif
498	{	908	{
499	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	909	rt_now = ev_time ();
		910
		911	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
500	{	912	{
501	periodics_reschedule (ev_now - now);	913	periodics_reschedule (EV_A);
502		914
503	/* adjust timers. this is easy, as the offset is the same for all */	915	/* adjust timers. this is easy, as the offset is the same for all */
504	for (i = 0; i < timercnt; ++i)	916	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	917	timers [i]->at += rt_now - mn_now;
506	}	918	}
507		919
508	now = ev_now;	920	mn_now = rt_now;
509	}	921	}
510	}	922	}
511		923
512	int ev_loop_done;	924	void
		925	ev_ref (EV_P)
		926	{
		927	++activecnt;
		928	}
513		929
		930	void
		931	ev_unref (EV_P)
		932	{
		933	--activecnt;
		934	}
		935
		936	static int loop_done;
		937
		938	void
514	void ev_loop (int flags)	939	ev_loop (EV_P_ int flags)
515	{	940	{
516	double block;	941	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	942	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
518
519	if (checkcnt)
520	{
521	queue_events ((W *)checks, checkcnt, EV_CHECK);
522	call_pending ();
523	}
524		943
525	do	944	do
526	{	945	{
		946	/* queue check watchers (and execute them) */
		947	if (expect_false (preparecnt))
		948	{
		949	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		950	call_pending (EV_A);
		951	}
		952
527	/* update fd-related kernel structures */	953	/* update fd-related kernel structures */
528	fd_reify ();	954	fd_reify (EV_A);
529		955
530	/* calculate blocking time */	956	/* calculate blocking time */
531		957
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	958	/* we only need this for !monotonic clockor timers, but as we basically
		959	always have timers, we just calculate it always */
		960	#if EV_USE_MONOTONIC
		961	if (expect_true (have_monotonic))
		962	time_update_monotonic (EV_A);
		963	else
		964	#endif
		965	{
533	ev_now = ev_time ();	966	rt_now = ev_time ();
		967	mn_now = rt_now;
		968	}
534		969
535	if (flags & EVLOOP_NONBLOCK || idlecnt)	970	if (flags & EVLOOP_NONBLOCK || idlecnt)
536	block = 0.;	971	block = 0.;
537	else	972	else
538	{	973	{
539	block = MAX_BLOCKTIME;	974	block = MAX_BLOCKTIME;
540		975
541	if (timercnt)	976	if (timercnt)
542	{	977	{
543	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	978	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
544	if (block > to) block = to;	979	if (block > to) block = to;
545	}	980	}
546		981
547	if (periodiccnt)	982	if (periodiccnt)
548	{	983	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	984	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
550	if (block > to) block = to;	985	if (block > to) block = to;
551	}	986	}
552		987
553	if (block < 0.) block = 0.;	988	if (block < 0.) block = 0.;
554	}	989	}
555		990
556	method_poll (block);	991	method_poll (EV_A_ block);
557		992
558	/* update ev_now, do magic */	993	/* update rt_now, do magic */
559	time_update ();	994	time_update (EV_A);
560		995
561	/* queue pending timers and reschedule them */	996	/* queue pending timers and reschedule them */
		997	timers_reify (EV_A); /* relative timers called last */
562	periodics_reify (); /* absolute timers first */	998	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */
564		999
565	/* queue idle watchers unless io or timers are pending */	1000	/* queue idle watchers unless io or timers are pending */
566	if (!pendingcnt)	1001	if (!pendingcnt)
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1002	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
568		1003
569	/* queue check and possibly idle watchers */	1004	/* queue check watchers, to be executed first */
		1005	if (checkcnt)
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1006	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1007
572	call_pending ();	1008	call_pending (EV_A);
573	}	1009	}
574	while (!ev_loop_done);	1010	while (activecnt && !loop_done);
575		1011
576	if (ev_loop_done != 2)	1012	if (loop_done != 2)
577	ev_loop_done = 0;	1013	loop_done = 0;
		1014	}
		1015
		1016	void
		1017	ev_unloop (EV_P_ int how)
		1018	{
		1019	loop_done = how;
578	}	1020	}
579		1021
580	/*****************************************************************************/	1022	/*****************************************************************************/
581		1023
582	static void	1024	inline void
583	wlist_add (WL *head, WL elem)	1025	wlist_add (WL *head, WL elem)
584	{	1026	{
585	elem->next = *head;	1027	elem->next = *head;
586	*head = elem;	1028	*head = elem;
587	}	1029	}
588		1030
589	static void	1031	inline void
590	wlist_del (WL *head, WL elem)	1032	wlist_del (WL *head, WL elem)
591	{	1033	{
592	while (*head)	1034	while (*head)
593	{	1035	{
594	if (*head == elem)	1036	if (*head == elem)
…		…
599		1041
600	head = &(*head)->next;	1042	head = &(*head)->next;
601	}	1043	}
602	}	1044	}
603		1045
604	static void	1046	inline void
		1047	ev_clear_pending (EV_P_ W w)
		1048	{
		1049	if (w->pending)
		1050	{
		1051	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1052	w->pending = 0;
		1053	}
		1054	}
		1055
		1056	inline void
605	ev_start (W w, int active)	1057	ev_start (EV_P_ W w, int active)
606	{	1058	{
607	w->pending = 0;	1059	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1060	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1061
608	w->active = active;	1062	w->active = active;
		1063	ev_ref (EV_A);
609	}	1064	}
610		1065
611	static void	1066	inline void
612	ev_stop (W w)	1067	ev_stop (EV_P_ W w)
613	{	1068	{
614	if (w->pending)	1069	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1070	w->active = 0;
618	}	1071	}
619		1072
620	/*****************************************************************************/	1073	/*****************************************************************************/
621		1074
622	void	1075	void
623	evio_start (struct ev_io *w)	1076	ev_io_start (EV_P_ struct ev_io *w)
624	{	1077	{
		1078	int fd = w->fd;
		1079
625	if (ev_is_active (w))	1080	if (ev_is_active (w))
626	return;	1081	return;
627		1082
628	int fd = w->fd;	1083	assert (("ev_io_start called with negative fd", fd >= 0));
629		1084
630	ev_start ((W)w, 1);	1085	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1086	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1087	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633		1088
634	++fdchangecnt;	1089	fd_change (EV_A_ fd);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1090	}
638		1091
639	void	1092	void
640	evio_stop (struct ev_io *w)	1093	ev_io_stop (EV_P_ struct ev_io *w)
641	{	1094	{
		1095	ev_clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1096	if (!ev_is_active (w))
643	return;	1097	return;
644		1098
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1099	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1100	ev_stop (EV_A_ (W)w);
647		1101
648	++fdchangecnt;	1102	fd_change (EV_A_ w->fd);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1103	}
652		1104
653
654	void	1105	void
655	evtimer_start (struct ev_timer *w)	1106	ev_timer_start (EV_P_ struct ev_timer *w)
656	{	1107	{
657	if (ev_is_active (w))	1108	if (ev_is_active (w))
658	return;	1109	return;
659		1110
660	w->at += now;	1111	w->at += mn_now;
661		1112
662	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1113	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
663		1114
664	ev_start ((W)w, ++timercnt);	1115	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1116	array_needsize (timers, timermax, timercnt, );
666	timers [timercnt - 1] = w;	1117	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);	1118	upheap ((WT *)timers, timercnt - 1);
668	}	1119	}
669		1120
670	void	1121	void
671	evtimer_stop (struct ev_timer *w)	1122	ev_timer_stop (EV_P_ struct ev_timer *w)
672	{	1123	{
		1124	ev_clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1125	if (!ev_is_active (w))
674	return;	1126	return;
675		1127
676	if (w->active < timercnt--)	1128	if (w->active < timercnt--)
677	{	1129	{
…		…
679	downheap ((WT *)timers, timercnt, w->active - 1);	1131	downheap ((WT *)timers, timercnt, w->active - 1);
680	}	1132	}
681		1133
682	w->at = w->repeat;	1134	w->at = w->repeat;
683		1135
684	ev_stop ((W)w);	1136	ev_stop (EV_A_ (W)w);
685	}	1137	}
686		1138
687	void	1139	void
688	evtimer_again (struct ev_timer *w)	1140	ev_timer_again (EV_P_ struct ev_timer *w)
689	{	1141	{
690	if (ev_is_active (w))	1142	if (ev_is_active (w))
691	{	1143	{
692	if (w->repeat)	1144	if (w->repeat)
693	{	1145	{
694	w->at = now + w->repeat;	1146	w->at = mn_now + w->repeat;
695	downheap ((WT *)timers, timercnt, w->active - 1);	1147	downheap ((WT *)timers, timercnt, w->active - 1);
696	}	1148	}
697	else	1149	else
698	evtimer_stop (w);	1150	ev_timer_stop (EV_A_ w);
699	}	1151	}
700	else if (w->repeat)	1152	else if (w->repeat)
701	evtimer_start (w);	1153	ev_timer_start (EV_A_ w);
702	}	1154	}
703		1155
704	void	1156	void
705	evperiodic_start (struct ev_periodic *w)	1157	ev_periodic_start (EV_P_ struct ev_periodic *w)
706	{	1158	{
707	if (ev_is_active (w))	1159	if (ev_is_active (w))
708	return;	1160	return;
709		1161
710	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1162	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
711		1163
712	/* this formula differs from the one in periodic_reify because we do not always round up */	1164	/* this formula differs from the one in periodic_reify because we do not always round up */
713	if (w->interval)	1165	if (w->interval)
714	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1166	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
715		1167
716	ev_start ((W)w, ++periodiccnt);	1168	ev_start (EV_A_ (W)w, ++periodiccnt);
717	array_needsize (periodics, periodicmax, periodiccnt, );	1169	array_needsize (periodics, periodicmax, periodiccnt, );
718	periodics [periodiccnt - 1] = w;	1170	periodics [periodiccnt - 1] = w;
719	upheap ((WT *)periodics, periodiccnt - 1);	1171	upheap ((WT *)periodics, periodiccnt - 1);
720	}	1172	}
721		1173
722	void	1174	void
723	evperiodic_stop (struct ev_periodic *w)	1175	ev_periodic_stop (EV_P_ struct ev_periodic *w)
724	{	1176	{
		1177	ev_clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1178	if (!ev_is_active (w))
726	return;	1179	return;
727		1180
728	if (w->active < periodiccnt--)	1181	if (w->active < periodiccnt--)
729	{	1182	{
730	periodics [w->active - 1] = periodics [periodiccnt];	1183	periodics [w->active - 1] = periodics [periodiccnt];
731	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1184	downheap ((WT *)periodics, periodiccnt, w->active - 1);
732	}	1185	}
733		1186
734	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
735	}	1188	}
736		1189
737	void	1190	void
738	evsignal_start (struct ev_signal *w)	1191	ev_idle_start (EV_P_ struct ev_idle *w)
739	{	1192	{
740	if (ev_is_active (w))	1193	if (ev_is_active (w))
741	return;	1194	return;
742		1195
		1196	ev_start (EV_A_ (W)w, ++idlecnt);
		1197	array_needsize (idles, idlemax, idlecnt, );
		1198	idles [idlecnt - 1] = w;
		1199	}
		1200
		1201	void
		1202	ev_idle_stop (EV_P_ struct ev_idle *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	idles [w->active - 1] = idles [--idlecnt];
		1209	ev_stop (EV_A_ (W)w);
		1210	}
		1211
		1212	void
		1213	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1214	{
		1215	if (ev_is_active (w))
		1216	return;
		1217
		1218	ev_start (EV_A_ (W)w, ++preparecnt);
		1219	array_needsize (prepares, preparemax, preparecnt, );
		1220	prepares [preparecnt - 1] = w;
		1221	}
		1222
		1223	void
		1224	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1225	{
		1226	ev_clear_pending (EV_A_ (W)w);
		1227	if (ev_is_active (w))
		1228	return;
		1229
		1230	prepares [w->active - 1] = prepares [--preparecnt];
		1231	ev_stop (EV_A_ (W)w);
		1232	}
		1233
		1234	void
		1235	ev_check_start (EV_P_ struct ev_check *w)
		1236	{
		1237	if (ev_is_active (w))
		1238	return;
		1239
		1240	ev_start (EV_A_ (W)w, ++checkcnt);
		1241	array_needsize (checks, checkmax, checkcnt, );
		1242	checks [checkcnt - 1] = w;
		1243	}
		1244
		1245	void
		1246	ev_check_stop (EV_P_ struct ev_check *w)
		1247	{
		1248	ev_clear_pending (EV_A_ (W)w);
		1249	if (ev_is_active (w))
		1250	return;
		1251
		1252	checks [w->active - 1] = checks [--checkcnt];
		1253	ev_stop (EV_A_ (W)w);
		1254	}
		1255
		1256	#ifndef SA_RESTART
		1257	# define SA_RESTART 0
		1258	#endif
		1259
		1260	void
		1261	ev_signal_start (EV_P_ struct ev_signal *w)
		1262	{
		1263	#if EV_MULTIPLICITY
		1264	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1265	#endif
		1266	if (ev_is_active (w))
		1267	return;
		1268
		1269	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1270
743	ev_start ((W)w, 1);	1271	ev_start (EV_A_ (W)w, 1);
744	array_needsize (signals, signalmax, w->signum, signals_init);	1272	array_needsize (signals, signalmax, w->signum, signals_init);
745	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1273	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
746		1274
747	if (!w->next)	1275	if (!w->next)
748	{	1276	{
749	struct sigaction sa;	1277	struct sigaction sa;
750	sa.sa_handler = sighandler;	1278	sa.sa_handler = sighandler;
751	sigfillset (&sa.sa_mask);	1279	sigfillset (&sa.sa_mask);
752	sa.sa_flags = 0;	1280	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
753	sigaction (w->signum, &sa, 0);	1281	sigaction (w->signum, &sa, 0);
754	}	1282	}
755	}	1283	}
756		1284
757	void	1285	void
758	evsignal_stop (struct ev_signal *w)	1286	ev_signal_stop (EV_P_ struct ev_signal *w)
759	{	1287	{
		1288	ev_clear_pending (EV_A_ (W)w);
760	if (!ev_is_active (w))	1289	if (!ev_is_active (w))
761	return;	1290	return;
762		1291
763	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1292	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
764	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
765		1294
766	if (!signals [w->signum - 1].head)	1295	if (!signals [w->signum - 1].head)
767	signal (w->signum, SIG_DFL);	1296	signal (w->signum, SIG_DFL);
768	}	1297	}
769		1298
770	void evidle_start (struct ev_idle *w)	1299	void
		1300	ev_child_start (EV_P_ struct ev_child *w)
771	{	1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
772	if (ev_is_active (w))	1305	if (ev_is_active (w))
773	return;	1306	return;
774		1307
775	ev_start ((W)w, ++idlecnt);	1308	ev_start (EV_A_ (W)w, 1);
776	array_needsize (idles, idlemax, idlecnt, );	1309	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
777	idles [idlecnt - 1] = w;
778	}	1310	}
779		1311
780	void evidle_stop (struct ev_idle *w)	1312	void
		1313	ev_child_stop (EV_P_ struct ev_child *w)
781	{	1314	{
782	idles [w->active - 1] = idles [--idlecnt];	1315	ev_clear_pending (EV_A_ (W)w);
783	ev_stop ((W)w);
784	}
785
786	void evcheck_start (struct ev_check *w)
787	{
788	if (ev_is_active (w))	1316	if (ev_is_active (w))
789	return;	1317	return;
790		1318
791	ev_start ((W)w, ++checkcnt);	1319	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
792	array_needsize (checks, checkmax, checkcnt, );
793	checks [checkcnt - 1] = w;
794	}
795
796	void evcheck_stop (struct ev_check *w)
797	{
798	checks [w->active - 1] = checks [--checkcnt];
799	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
800	}	1321	}
801		1322
802	/*****************************************************************************/	1323	/*****************************************************************************/
803		1324
804	#if 0	1325	struct ev_once
805		1326	{
806	struct ev_io wio;	1327	struct ev_io io;
807
808	static void
809	sin_cb (struct ev_io *w, int revents)
810	{
811	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
812	}
813
814	static void
815	ocb (struct ev_timer *w, int revents)
816	{
817	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
818	evtimer_stop (w);
819	evtimer_start (w);
820	}
821
822	static void
823	scb (struct ev_signal *w, int revents)
824	{
825	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
826	evio_stop (&wio);
827	evio_start (&wio);
828	}
829
830	static void
831	gcb (struct ev_signal *w, int revents)
832	{
833	fprintf (stderr, "generic %x\n", revents);
834
835	}
836
837	int main (void)
838	{
839	ev_init (0);
840
841	evio_init (&wio, sin_cb, 0, EV_READ);
842	evio_start (&wio);
843
844	struct ev_timer t[10000];
845
846	#if 0
847	int i;
848	for (i = 0; i < 10000; ++i)
849	{
850	struct ev_timer *w = t + i;
851	evw_init (w, ocb, i);
852	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
853	evtimer_start (w);
854	if (drand48 () < 0.5)
855	evtimer_stop (w);
856	}
857	#endif
858
859	struct ev_timer t1;	1328	struct ev_timer to;
860	evtimer_init (&t1, ocb, 5, 10);	1329	void (*cb)(int revents, void *arg);
861	evtimer_start (&t1);	1330	void *arg;
		1331	};
862		1332
863	struct ev_signal sig;	1333	static void
864	evsignal_init (&sig, scb, SIGQUIT);	1334	once_cb (EV_P_ struct ev_once *once, int revents)
865	evsignal_start (&sig);	1335	{
		1336	void (*cb)(int revents, void *arg) = once->cb;
		1337	void *arg = once->arg;
866		1338
867	struct ev_check cw;	1339	ev_io_stop (EV_A_ &once->io);
868	evcheck_init (&cw, gcb);	1340	ev_timer_stop (EV_A_ &once->to);
869	evcheck_start (&cw);	1341	free (once);
870		1342
871	struct ev_idle iw;	1343	cb (revents, arg);
872	evidle_init (&iw, gcb);
873	evidle_start (&iw);
874
875	ev_loop (0);
876
877	return 0;
878	}	1344	}
879		1345
880	#endif	1346	static void
		1347	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1348	{
		1349	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1350	}
881		1351
		1352	static void
		1353	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1354	{
		1355	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1356	}
882		1357
		1358	void
		1359	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1360	{
		1361	struct ev_once *once = malloc (sizeof (struct ev_once));
883		1362
		1363	if (!once)
		1364	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1365	else
		1366	{
		1367	once->cb = cb;
		1368	once->arg = arg;
884		1369
		1370	ev_watcher_init (&once->io, once_cb_io);
		1371	if (fd >= 0)
		1372	{
		1373	ev_io_set (&once->io, fd, events);
		1374	ev_io_start (EV_A_ &once->io);
		1375	}
		1376
		1377	ev_watcher_init (&once->to, once_cb_to);
		1378	if (timeout >= 0.)
		1379	{
		1380	ev_timer_set (&once->to, timeout, 0.);
		1381	ev_timer_start (EV_A_ &once->to);
		1382	}
		1383	}
		1384	}
		1385

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