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

Comparing libev/ev.c (file contents):
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs.
Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
41	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
42	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
43	#include <sys/time.h>	50	#include <sys/time.h>
44	#include <time.h>	51	#include <time.h>
45		52
		53	/**/
		54
46	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
47	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
49	# endif	84	#endif
50	#endif
51		85
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
62	#endif	89	#endif
		90
		91	/**/
63		92
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		97
68	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		113
70	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
73		117
74	static ev_tstamp now, diff; /* monotonic clock */	118	static ev_tstamp now_floor, mn_now, diff; /* monotonic clock */
75	ev_tstamp ev_now;	119	static ev_tstamp rt_now;
76	int ev_method;	120	static int method;
77		121
78	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
79		123
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);	125	static void (*method_modify)(EV_P_ int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);	126	static void (*method_poll)(EV_P_ ev_tstamp timeout);
		127
		128	static int activecnt; /* number of active events */
		129
		130	#if EV_USE_SELECT
		131	static unsigned char vec_ri, vec_ro, vec_wi, vec_wo;
		132	static int vec_max;
		133	#endif
		134
		135	#if EV_USEV_POLL
		136	static struct pollfd *polls;
		137	static int pollmax, pollcnt;
		138	static int pollidxs; / maps fds into structure indices */
		139	static int pollidxmax;
		140	#endif
		141
		142	#if EV_USE_EPOLL
		143	static int epoll_fd = -1;
		144
		145	static struct epoll_event *events;
		146	static int eventmax;
		147	#endif
		148
		149	#if EV_USE_KQUEUE
		150	static int kqueue_fd;
		151	static struct kevent *kqueue_changes;
		152	static int kqueue_changemax, kqueue_changecnt;
		153	static struct kevent *kqueue_events;
		154	static int kqueue_eventmax;
		155	#endif
83		156
84	/*****************************************************************************/	157	/*****************************************************************************/
85		158
86	ev_tstamp	159	inline ev_tstamp
87	ev_time (void)	160	ev_time (void)
88	{	161	{
89	#if HAVE_REALTIME	162	#if EV_USE_REALTIME
90	struct timespec ts;	163	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	164	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	165	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	166	#else
94	struct timeval tv;	167	struct timeval tv;
95	gettimeofday (&tv, 0);	168	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	169	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	170	#endif
98	}	171	}
99		172
100	static ev_tstamp	173	inline ev_tstamp
101	get_clock (void)	174	get_clock (void)
102	{	175	{
103	#if HAVE_MONOTONIC	176	#if EV_USE_MONOTONIC
104	if (have_monotonic)	177	if (expect_true (have_monotonic))
105	{	178	{
106	struct timespec ts;	179	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	180	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	181	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	182	}
110	#endif	183	#endif
111		184
112	return ev_time ();	185	return ev_time ();
113	}	186	}
114		187
		188	ev_tstamp
		189	ev_now (EV_P)
		190	{
		191	return rt_now;
		192	}
		193
		194	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		195
115	#define array_needsize(base,cur,cnt,init) \	196	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	197	if (expect_false ((cnt) > cur)) \
117	{ \	198	{ \
118	int newcnt = cur; \	199	int newcnt = cur; \
119	do \	200	do \
120	{ \	201	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	202	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	203	} \
123	while ((cnt) > newcnt); \	204	while ((cnt) > newcnt); \
124	\	205	\
125	base = realloc (base, sizeof (base) (newcnt)); \	206	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	207	init (base + cur, newcnt - cur); \
…		…
129		210
130	/*****************************************************************************/	211	/*****************************************************************************/
131		212
132	typedef struct	213	typedef struct
133	{	214	{
134	struct ev_io *head;	215	struct ev_watcher_list *head;
135	unsigned char wev, rev; /* want, received event set */	216	unsigned char events;
		217	unsigned char reify;
136	} ANFD;	218	} ANFD;
137		219
138	static ANFD *anfds;	220	static ANFD *anfds;
139	static int anfdmax;	221	static int anfdmax;
140		222
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	223	static void
145	anfds_init (ANFD *base, int count)	224	anfds_init (ANFD *base, int count)
146	{	225	{
147	while (count--)	226	while (count--)
148	{	227	{
149	base->head = 0;	228	base->head = 0;
150	base->wev = base->rev = EV_NONE;	229	base->events = EV_NONE;
		230	base->reify = 0;
		231
151	++base;	232	++base;
152	}	233	}
153	}	234	}
154		235
155	typedef struct	236	typedef struct
156	{	237	{
157	W w;	238	W w;
158	int events;	239	int events;
159	} ANPENDING;	240	} ANPENDING;
160		241
161	static ANPENDING *pendings;	242	static ANPENDING *pendings [NUMPRI];
162	static int pendingmax, pendingcnt;	243	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
163		244
164	static void	245	static void
165	event (W w, int events)	246	event (EV_P_ W w, int events)
166	{	247	{
167	if (w->active)	248	if (w->pending)
168	{	249	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	250	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		251	return;
173	}	252	}
174	}
175		253
		254	w->pending = ++pendingcnt [ABSPRI (w)];
		255	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		256	pendings [ABSPRI (w)][w->pending - 1].w = w;
		257	pendings [ABSPRI (w)][w->pending - 1].events = events;
		258	}
		259
176	static void	260	static void
		261	queue_events (EV_P_ W *events, int eventcnt, int type)
		262	{
		263	int i;
		264
		265	for (i = 0; i < eventcnt; ++i)
		266	event (EV_A_ events [i], type);
		267	}
		268
		269	static void
177	fd_event (int fd, int events)	270	fd_event (EV_P_ int fd, int events)
178	{	271	{
179	ANFD *anfd = anfds + fd;	272	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	273	struct ev_io *w;
181		274
182	for (w = anfd->head; w; w = w->next)	275	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
183	{	276	{
184	int ev = w->events & events;	277	int ev = w->events & events;
185		278
186	if (ev)	279	if (ev)
187	event ((W)w, ev);	280	event (EV_A_ (W)w, ev);
188	}	281	}
189	}	282	}
190		283
		284	/*****************************************************************************/
		285
		286	static int *fdchanges;
		287	static int fdchangemax, fdchangecnt;
		288
191	static void	289	static void
192	queue_events (W *events, int eventcnt, int type)	290	fd_reify (EV_P)
193	{	291	{
194	int i;	292	int i;
195		293
196	for (i = 0; i < eventcnt; ++i)	294	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	295	{
		296	int fd = fdchanges [i];
		297	ANFD *anfd = anfds + fd;
		298	struct ev_io *w;
		299
		300	int events = 0;
		301
		302	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		303	events \|= w->events;
		304
		305	anfd->reify = 0;
		306
		307	if (anfd->events != events)
		308	{
		309	method_modify (EV_A_ fd, anfd->events, events);
		310	anfd->events = events;
		311	}
		312	}
		313
		314	fdchangecnt = 0;
		315	}
		316
		317	static void
		318	fd_change (EV_P_ int fd)
		319	{
		320	if (anfds [fd].reify \|\| fdchangecnt < 0)
		321	return;
		322
		323	anfds [fd].reify = 1;
		324
		325	++fdchangecnt;
		326	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		327	fdchanges [fdchangecnt - 1] = fd;
		328	}
		329
		330	static void
		331	fd_kill (EV_P_ int fd)
		332	{
		333	struct ev_io *w;
		334
		335	while ((w = (struct ev_io *)anfds [fd].head))
		336	{
		337	ev_io_stop (EV_A_ w);
		338	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		339	}
198	}	340	}
199		341
200	/* called on EBADF to verify fds */	342	/* called on EBADF to verify fds */
201	static void	343	static void
202	fd_recheck (void)	344	fd_ebadf (EV_P)
203	{	345	{
204	int fd;	346	int fd;
205		347
206	for (fd = 0; fd < anfdmax; ++fd)	348	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	349	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	350	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)	351	fd_kill (EV_A_ fd);
		352	}
		353
		354	/* called on ENOMEM in select/poll to kill some fds and retry */
		355	static void
		356	fd_enomem (EV_P)
		357	{
		358	int fd = anfdmax;
		359
		360	while (fd--)
		361	if (anfds [fd].events)
210	{	362	{
211	event ((W)anfds [fd].head, EV_ERROR);	363	close (fd);
212	evio_stop (anfds [fd].head);	364	fd_kill (EV_A_ fd);
		365	return;
213	}	366	}
214	}	367	}
215		368
216	/*****************************************************************************/	369	/*****************************************************************************/
217		370
218	static struct ev_timer **timers;	371	static struct ev_timer **timers;
…		…
264		417
265	/*****************************************************************************/	418	/*****************************************************************************/
266		419
267	typedef struct	420	typedef struct
268	{	421	{
269	struct ev_signal *head;	422	struct ev_watcher_list *head;
270	sig_atomic_t gotsig;	423	sig_atomic_t volatile gotsig;
271	} ANSIG;	424	} ANSIG;
272		425
273	static ANSIG *signals;	426	static ANSIG *signals;
274	static int signalmax;	427	static int signalmax;
275		428
276	static int sigpipe [2];	429	static int sigpipe [2];
277	static sig_atomic_t gotsig;	430	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	431	static struct ev_io sigev;
279		432
280	static void	433	static void
281	signals_init (ANSIG *base, int count)	434	signals_init (ANSIG *base, int count)
282	{	435	{
283	while (count--)	436	while (count--)
284	{	437	{
285	base->head = 0;	438	base->head = 0;
286	base->gotsig = 0;	439	base->gotsig = 0;
		440
287	++base;	441	++base;
288	}	442	}
289	}	443	}
290		444
291	static void	445	static void
…		…
293	{	447	{
294	signals [signum - 1].gotsig = 1;	448	signals [signum - 1].gotsig = 1;
295		449
296	if (!gotsig)	450	if (!gotsig)
297	{	451	{
		452	int old_errno = errno;
298	gotsig = 1;	453	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	454	write (sigpipe [1], &signum, 1);
		455	errno = old_errno;
300	}	456	}
301	}	457	}
302		458
303	static void	459	static void
304	sigcb (struct ev_io *iow, int revents)	460	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	461	{
306	struct ev_signal *w;	462	struct ev_watcher_list *w;
307	int sig;	463	int signum;
308		464
		465	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	466	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		467
312	for (sig = signalmax; sig--; )	468	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	469	if (signals [signum].gotsig)
314	{	470	{
315	signals [sig].gotsig = 0;	471	signals [signum].gotsig = 0;
316		472
317	for (w = signals [sig].head; w; w = w->next)	473	for (w = signals [signum].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);	474	event (EV_A_ (W)w, EV_SIGNAL);
319	}	475	}
320	}	476	}
321		477
322	static void	478	static void
323	siginit (void)	479	siginit (EV_P)
324	{	480	{
		481	#ifndef WIN32
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	482	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	483	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327		484
328	/* rather than sort out wether we really need nb, set it */	485	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	486	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	487	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		488	#endif
331		489
332	evio_set (&sigev, sigpipe [0], EV_READ);	490	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	491	ev_io_start (&sigev);
		492	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	493	}
335		494
336	/*****************************************************************************/	495	/*****************************************************************************/
337		496
338	static struct ev_idle **idles;	497	static struct ev_idle **idles;
…		…
347	/*****************************************************************************/	506	/*****************************************************************************/
348		507
349	static struct ev_child *childs [PID_HASHSIZE];	508	static struct ev_child *childs [PID_HASHSIZE];
350	static struct ev_signal childev;	509	static struct ev_signal childev;
351		510
		511	#ifndef WIN32
		512
352	#ifndef WCONTINUED	513	#ifndef WCONTINUED
353	# define WCONTINUED 0	514	# define WCONTINUED 0
354	#endif	515	#endif
355		516
356	static void	517	static void
357	childcb (struct ev_signal *sw, int revents)	518	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	519	{
359	struct ev_child *w;	520	struct ev_child *w;
		521
		522	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		523	if (w->pid == pid \|\| !w->pid)
		524	{
		525	w->priority = sw->priority; /* need to do it now */
		526	w->rpid = pid;
		527	w->rstatus = status;
		528	event (EV_A_ (W)w, EV_CHILD);
		529	}
		530	}
		531
		532	static void
		533	childcb (EV_P_ struct ev_signal *sw, int revents)
		534	{
360	int pid, status;	535	int pid, status;
361		536
362	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	537	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	538	{
364	if (w->pid == pid \|\| w->pid == -1)	539	/* make sure we are called again until all childs have been reaped */
365	{	540	event (EV_A_ (W)sw, EV_SIGNAL);
366	w->status = status;	541
367	event ((W)w, EV_CHILD);	542	child_reap (EV_A_ sw, pid, pid, status);
368	}	543	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		544	}
369	}	545	}
		546
		547	#endif
370		548
371	/*****************************************************************************/	549	/*****************************************************************************/
372		550
		551	#if EV_USE_KQUEUE
		552	# include "ev_kqueue.c"
		553	#endif
373	#if HAVE_EPOLL	554	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	555	# include "ev_epoll.c"
375	#endif	556	#endif
		557	#if EV_USEV_POLL
		558	# include "ev_poll.c"
		559	#endif
376	#if HAVE_SELECT	560	#if EV_USE_SELECT
377	# include "ev_select.c"	561	# include "ev_select.c"
378	#endif	562	#endif
379		563
380	int	564	int
381	ev_version_major (void)	565	ev_version_major (void)
…		…
387	ev_version_minor (void)	571	ev_version_minor (void)
388	{	572	{
389	return EV_VERSION_MINOR;	573	return EV_VERSION_MINOR;
390	}	574	}
391		575
392	int ev_init (int flags)	576	/* return true if we are running with elevated privileges and should ignore env variables */
		577	static int
		578	enable_secure (void)
393	{	579	{
		580	#ifdef WIN32
		581	return 0;
		582	#else
		583	return getuid () != geteuid ()
		584	\|\| getgid () != getegid ();
		585	#endif
		586	}
		587
		588	int
		589	ev_method (EV_P)
		590	{
		591	return method;
		592	}
		593
		594	int
		595	ev_init (EV_P_ int methods)
		596	{
394	if (!ev_method)	597	if (!method)
395	{	598	{
396	#if HAVE_MONOTONIC	599	#if EV_USE_MONOTONIC
397	{	600	{
398	struct timespec ts;	601	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	602	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	603	have_monotonic = 1;
401	}	604	}
402	#endif	605	#endif
403		606
404	ev_now = ev_time ();	607	rt_now = ev_time ();
405	now = get_clock ();	608	mn_now = get_clock ();
		609	now_floor = mn_now;
406	diff = ev_now - now;	610	diff = rt_now - mn_now;
407		611
408	if (pipe (sigpipe))	612	if (pipe (sigpipe))
409	return 0;	613	return 0;
410		614
		615	if (methods == EVMETHOD_AUTO)
		616	if (!enable_secure () && getenv ("LIBmethodS"))
		617	methods = atoi (getenv ("LIBmethodS"));
		618	else
411	ev_method = EVMETHOD_NONE;	619	methods = EVMETHOD_ANY;
		620
		621	method = 0;
		622	#if EV_USE_KQUEUE
		623	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		624	#endif
412	#if HAVE_EPOLL	625	#if EV_USE_EPOLL
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	626	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
414	#endif	627	#endif
		628	#if EV_USEV_POLL
		629	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		630	#endif
415	#if HAVE_SELECT	631	#if EV_USE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);	632	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
417	#endif	633	#endif
418		634
419	if (ev_method)	635	if (method)
420	{	636	{
421	evw_init (&sigev, sigcb);	637	ev_watcher_init (&sigev, sigcb);
		638	ev_set_priority (&sigev, EV_MAXPRI);
422	siginit ();	639	siginit (EV_A);
423		640
		641	#ifndef WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	642	ev_signal_init (&childev, childcb, SIGCHLD);
		643	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	644	ev_signal_start (EV_A_ &childev);
		645	ev_unref (EV_A); /* child watcher should not keep loop alive */
		646	#endif
426	}	647	}
427	}	648	}
428		649
429	return ev_method;	650	return method;
430	}	651	}
431		652
432	/*****************************************************************************/	653	/*****************************************************************************/
433		654
434	void	655	void
435	ev_prefork (void)	656	ev_fork_prepare (void)
436	{	657	{
437	/* nop */	658	/* nop */
438	}	659	}
439		660
440	void	661	void
441	ev_postfork_parent (void)	662	ev_fork_parent (void)
442	{	663	{
443	/* nop */	664	/* nop */
444	}	665	}
445		666
446	void	667	void
447	ev_postfork_child (void)	668	ev_fork_child (void)
448	{	669	{
449	#if HAVE_EPOLL	670	#if EV_USE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)	671	if (method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();	672	epoll_postfork_child ();
452	#endif	673	#endif
453		674
454	evio_stop (&sigev);	675	ev_io_stop (&sigev);
455	close (sigpipe [0]);	676	close (sigpipe [0]);
456	close (sigpipe [1]);	677	close (sigpipe [1]);
457	pipe (sigpipe);	678	pipe (sigpipe);
458	siginit ();	679	siginit ();
459	}	680	}
460		681
461	/*****************************************************************************/	682	/*****************************************************************************/
462		683
463	static void	684	static void
464	fd_reify (void)	685	call_pending (EV_P)
465	{	686	{
466	int i;	687	int pri;
467		688
468	for (i = 0; i < fdchangecnt; ++i)	689	for (pri = NUMPRI; pri--; )
469	{	690	while (pendingcnt [pri])
470	int fd = fdchanges [i];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473
474	int wev = 0;
475
476	for (w = anfd->head; w; w = w->next)
477	wev \|= w->events;
478
479	if (anfd->wev != wev)
480	{	691	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;	692	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
495		693
496	if (p->w)	694	if (p->w)
497	{	695	{
498	p->w->pending = 0;	696	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	697	p->w->cb (EV_A_ p->w, p->events);
500	}	698	}
501	}	699	}
502	}	700	}
503		701
504	static void	702	static void
505	timers_reify (void)	703	timers_reify (EV_P)
506	{	704	{
507	while (timercnt && timers [0]->at <= now)	705	while (timercnt && timers [0]->at <= mn_now)
508	{	706	{
509	struct ev_timer *w = timers [0];	707	struct ev_timer *w = timers [0];
510
511	event ((W)w, EV_TIMEOUT);
512		708
513	/* first reschedule or stop timer */	709	/* first reschedule or stop timer */
514	if (w->repeat)	710	if (w->repeat)
515	{	711	{
		712	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
516	w->at = now + w->repeat;	713	w->at = mn_now + w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));
518	downheap ((WT *)timers, timercnt, 0);	714	downheap ((WT *)timers, timercnt, 0);
519	}	715	}
520	else	716	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	717	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		718
		719	event ((W)w, EV_TIMEOUT);
		720	}
		721	}
		722
525	static void	723	static void
526	periodics_reify (void)	724	periodics_reify (EV_P)
527	{	725	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	726	while (periodiccnt && periodics [0]->at <= rt_now)
529	{	727	{
530	struct ev_periodic *w = periodics [0];	728	struct ev_periodic *w = periodics [0];
531		729
532	/* first reschedule or stop timer */	730	/* first reschedule or stop timer */
533	if (w->interval)	731	if (w->interval)
534	{	732	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	733	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	734	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	735	downheap ((WT *)periodics, periodiccnt, 0);
538	}	736	}
539	else	737	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	738	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		739
542	event ((W)w, EV_TIMEOUT);	740	event (EV_A_ (W)w, EV_PERIODIC);
543	}	741	}
544	}	742	}
545		743
546	static void	744	static void
547	periodics_reschedule (ev_tstamp diff)	745	periodics_reschedule (EV_P_ ev_tstamp diff)
548	{	746	{
549	int i;	747	int i;
550		748
551	/* adjust periodics after time jump */	749	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	750	for (i = 0; i < periodiccnt; ++i)
553	{	751	{
554	struct ev_periodic *w = periodics [i];	752	struct ev_periodic *w = periodics [i];
555		753
556	if (w->interval)	754	if (w->interval)
557	{	755	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	756	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
559		757
560	if (fabs (diff) >= 1e-4)	758	if (fabs (diff) >= 1e-4)
561	{	759	{
562	evperiodic_stop (w);	760	ev_periodic_stop (EV_A_ w);
563	evperiodic_start (w);	761	ev_periodic_start (EV_A_ w);
564		762
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	763	i = 0; /* restart loop, inefficient, but time jumps should be rare */
566	}	764	}
567	}	765	}
568	}	766	}
569	}	767	}
570		768
		769	inline int
		770	time_update_monotonic (EV_P)
		771	{
		772	mn_now = get_clock ();
		773
		774	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		775	{
		776	rt_now = mn_now + diff;
		777	return 0;
		778	}
		779	else
		780	{
		781	now_floor = mn_now;
		782	rt_now = ev_time ();
		783	return 1;
		784	}
		785	}
		786
571	static void	787	static void
572	time_update (void)	788	time_update (EV_P)
573	{	789	{
574	int i;	790	int i;
575		791
576	ev_now = ev_time ();	792	#if EV_USE_MONOTONIC
577
578	if (have_monotonic)	793	if (expect_true (have_monotonic))
579	{	794	{
580	ev_tstamp odiff = diff;	795	if (time_update_monotonic (EV_A))
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	796	{
584	now = get_clock ();	797	ev_tstamp odiff = diff;
		798
		799	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		800	{
585	diff = ev_now - now;	801	diff = rt_now - mn_now;
586		802
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)	803	if (fabs (odiff - diff) < MIN_TIMEJUMP)
588	return; /* all is well */	804	return; /* all is well */
589		805
590	ev_now = ev_time ();	806	rt_now = ev_time ();
		807	mn_now = get_clock ();
		808	now_floor = mn_now;
		809	}
		810
		811	periodics_reschedule (EV_A_ diff - odiff);
		812	/* no timer adjustment, as the monotonic clock doesn't jump */
591	}	813	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}	814	}
596	else	815	else
		816	#endif
597	{	817	{
598	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	818	rt_now = ev_time ();
		819
		820	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
599	{	821	{
600	periodics_reschedule (ev_now - now);	822	periodics_reschedule (EV_A_ rt_now - mn_now);
601		823
602	/* adjust timers. this is easy, as the offset is the same for all */	824	/* adjust timers. this is easy, as the offset is the same for all */
603	for (i = 0; i < timercnt; ++i)	825	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	826	timers [i]->at += diff;
605	}	827	}
606		828
607	now = ev_now;	829	mn_now = rt_now;
608	}	830	}
609	}	831	}
610		832
611	int ev_loop_done;	833	void
		834	ev_ref (EV_P)
		835	{
		836	++activecnt;
		837	}
612		838
		839	void
		840	ev_unref (EV_P)
		841	{
		842	--activecnt;
		843	}
		844
		845	static int loop_done;
		846
		847	void
613	void ev_loop (int flags)	848	ev_loop (EV_P_ int flags)
614	{	849	{
615	double block;	850	double block;
616	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	851	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
617		852
618	do	853	do
619	{	854	{
620	/* queue check watchers (and execute them) */	855	/* queue check watchers (and execute them) */
621	if (preparecnt)	856	if (expect_false (preparecnt))
622	{	857	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	858	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	859	call_pending (EV_A);
625	}	860	}
626		861
627	/* update fd-related kernel structures */	862	/* update fd-related kernel structures */
628	fd_reify ();	863	fd_reify (EV_A);
629		864
630	/* calculate blocking time */	865	/* calculate blocking time */
631		866
632	/* we only need this for !monotonic clockor timers, but as we basically	867	/* we only need this for !monotonic clockor timers, but as we basically
633	always have timers, we just calculate it always */	868	always have timers, we just calculate it always */
		869	#if EV_USE_MONOTONIC
		870	if (expect_true (have_monotonic))
		871	time_update_monotonic (EV_A);
		872	else
		873	#endif
		874	{
634	ev_now = ev_time ();	875	rt_now = ev_time ();
		876	mn_now = rt_now;
		877	}
635		878
636	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	879	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
637	block = 0.;	880	block = 0.;
638	else	881	else
639	{	882	{
640	block = MAX_BLOCKTIME;	883	block = MAX_BLOCKTIME;
641		884
642	if (timercnt)	885	if (timercnt)
643	{	886	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	887	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
645	if (block > to) block = to;	888	if (block > to) block = to;
646	}	889	}
647		890
648	if (periodiccnt)	891	if (periodiccnt)
649	{	892	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	893	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
651	if (block > to) block = to;	894	if (block > to) block = to;
652	}	895	}
653		896
654	if (block < 0.) block = 0.;	897	if (block < 0.) block = 0.;
655	}	898	}
656		899
657	method_poll (block);	900	method_poll (EV_A_ block);
658		901
659	/* update ev_now, do magic */	902	/* update rt_now, do magic */
660	time_update ();	903	time_update (EV_A);
661		904
662	/* queue pending timers and reschedule them */	905	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	906	timers_reify (EV_A); /* relative timers called last */
664	periodics_reify (); /* absolute timers called first */	907	periodics_reify (EV_A); /* absolute timers called first */
665		908
666	/* queue idle watchers unless io or timers are pending */	909	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	910	if (!pendingcnt)
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	911	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		912
670	/* queue check watchers, to be executed first */	913	/* queue check watchers, to be executed first */
671	if (checkcnt)	914	if (checkcnt)
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	915	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		916
674	call_pending ();	917	call_pending (EV_A);
675	}	918	}
676	while (!ev_loop_done);	919	while (activecnt && !loop_done);
677		920
678	if (ev_loop_done != 2)	921	if (loop_done != 2)
679	ev_loop_done = 0;	922	loop_done = 0;
		923	}
		924
		925	void
		926	ev_unloop (EV_P_ int how)
		927	{
		928	loop_done = how;
680	}	929	}
681		930
682	/*****************************************************************************/	931	/*****************************************************************************/
683		932
684	static void	933	inline void
685	wlist_add (WL *head, WL elem)	934	wlist_add (WL *head, WL elem)
686	{	935	{
687	elem->next = *head;	936	elem->next = *head;
688	*head = elem;	937	*head = elem;
689	}	938	}
690		939
691	static void	940	inline void
692	wlist_del (WL *head, WL elem)	941	wlist_del (WL *head, WL elem)
693	{	942	{
694	while (*head)	943	while (*head)
695	{	944	{
696	if (*head == elem)	945	if (*head == elem)
…		…
701		950
702	head = &(*head)->next;	951	head = &(*head)->next;
703	}	952	}
704	}	953	}
705		954
706	static void	955	inline void
707	ev_clear (W w)	956	ev_clear_pending (EV_P_ W w)
708	{	957	{
709	if (w->pending)	958	if (w->pending)
710	{	959	{
711	pendings [w->pending - 1].w = 0;	960	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	961	w->pending = 0;
713	}	962	}
714	}	963	}
715		964
716	static void	965	inline void
717	ev_start (W w, int active)	966	ev_start (EV_P_ W w, int active)
718	{	967	{
		968	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		969	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		970
719	w->active = active;	971	w->active = active;
		972	ev_ref (EV_A);
720	}	973	}
721		974
722	static void	975	inline void
723	ev_stop (W w)	976	ev_stop (EV_P_ W w)
724	{	977	{
		978	ev_unref (EV_A);
725	w->active = 0;	979	w->active = 0;
726	}	980	}
727		981
728	/*****************************************************************************/	982	/*****************************************************************************/
729		983
730	void	984	void
731	evio_start (struct ev_io *w)	985	ev_io_start (EV_P_ struct ev_io *w)
732	{	986	{
		987	int fd = w->fd;
		988
733	if (ev_is_active (w))	989	if (ev_is_active (w))
734	return;	990	return;
735		991
736	int fd = w->fd;	992	assert (("ev_io_start called with negative fd", fd >= 0));
737		993
738	ev_start ((W)w, 1);	994	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	995	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	996	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		997
742	++fdchangecnt;	998	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745	}	999	}
746		1000
747	void	1001	void
748	evio_stop (struct ev_io *w)	1002	ev_io_stop (EV_P_ struct ev_io *w)
749	{	1003	{
750	ev_clear ((W)w);	1004	ev_clear_pending (EV_A_ (W)w);
751	if (!ev_is_active (w))	1005	if (!ev_is_active (w))
752	return;	1006	return;
753		1007
754	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1008	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
755	ev_stop ((W)w);	1009	ev_stop (EV_A_ (W)w);
756		1010
757	++fdchangecnt;	1011	fd_change (EV_A_ w->fd);
758	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
759	fdchanges [fdchangecnt - 1] = w->fd;
760	}	1012	}
761		1013
762	void	1014	void
763	evtimer_start (struct ev_timer *w)	1015	ev_timer_start (EV_P_ struct ev_timer *w)
764	{	1016	{
765	if (ev_is_active (w))	1017	if (ev_is_active (w))
766	return;	1018	return;
767		1019
768	w->at += now;	1020	w->at += mn_now;
769		1021
770	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1022	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
771		1023
772	ev_start ((W)w, ++timercnt);	1024	ev_start (EV_A_ (W)w, ++timercnt);
773	array_needsize (timers, timermax, timercnt, );	1025	array_needsize (timers, timermax, timercnt, );
774	timers [timercnt - 1] = w;	1026	timers [timercnt - 1] = w;
775	upheap ((WT *)timers, timercnt - 1);	1027	upheap ((WT *)timers, timercnt - 1);
776	}	1028	}
777		1029
778	void	1030	void
779	evtimer_stop (struct ev_timer *w)	1031	ev_timer_stop (EV_P_ struct ev_timer *w)
780	{	1032	{
781	ev_clear ((W)w);	1033	ev_clear_pending (EV_A_ (W)w);
782	if (!ev_is_active (w))	1034	if (!ev_is_active (w))
783	return;	1035	return;
784		1036
785	if (w->active < timercnt--)	1037	if (w->active < timercnt--)
786	{	1038	{
…		…
788	downheap ((WT *)timers, timercnt, w->active - 1);	1040	downheap ((WT *)timers, timercnt, w->active - 1);
789	}	1041	}
790		1042
791	w->at = w->repeat;	1043	w->at = w->repeat;
792		1044
793	ev_stop ((W)w);	1045	ev_stop (EV_A_ (W)w);
794	}	1046	}
795		1047
796	void	1048	void
797	evtimer_again (struct ev_timer *w)	1049	ev_timer_again (EV_P_ struct ev_timer *w)
798	{	1050	{
799	if (ev_is_active (w))	1051	if (ev_is_active (w))
800	{	1052	{
801	if (w->repeat)	1053	if (w->repeat)
802	{	1054	{
803	w->at = now + w->repeat;	1055	w->at = mn_now + w->repeat;
804	downheap ((WT *)timers, timercnt, w->active - 1);	1056	downheap ((WT *)timers, timercnt, w->active - 1);
805	}	1057	}
806	else	1058	else
807	evtimer_stop (w);	1059	ev_timer_stop (EV_A_ w);
808	}	1060	}
809	else if (w->repeat)	1061	else if (w->repeat)
810	evtimer_start (w);	1062	ev_timer_start (EV_A_ w);
811	}	1063	}
812		1064
813	void	1065	void
814	evperiodic_start (struct ev_periodic *w)	1066	ev_periodic_start (EV_P_ struct ev_periodic *w)
815	{	1067	{
816	if (ev_is_active (w))	1068	if (ev_is_active (w))
817	return;	1069	return;
818		1070
819	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1071	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
820		1072
821	/* this formula differs from the one in periodic_reify because we do not always round up */	1073	/* this formula differs from the one in periodic_reify because we do not always round up */
822	if (w->interval)	1074	if (w->interval)
823	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1075	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
824		1076
825	ev_start ((W)w, ++periodiccnt);	1077	ev_start (EV_A_ (W)w, ++periodiccnt);
826	array_needsize (periodics, periodicmax, periodiccnt, );	1078	array_needsize (periodics, periodicmax, periodiccnt, );
827	periodics [periodiccnt - 1] = w;	1079	periodics [periodiccnt - 1] = w;
828	upheap ((WT *)periodics, periodiccnt - 1);	1080	upheap ((WT *)periodics, periodiccnt - 1);
829	}	1081	}
830		1082
831	void	1083	void
832	evperiodic_stop (struct ev_periodic *w)	1084	ev_periodic_stop (EV_P_ struct ev_periodic *w)
833	{	1085	{
834	ev_clear ((W)w);	1086	ev_clear_pending (EV_A_ (W)w);
835	if (!ev_is_active (w))	1087	if (!ev_is_active (w))
836	return;	1088	return;
837		1089
838	if (w->active < periodiccnt--)	1090	if (w->active < periodiccnt--)
839	{	1091	{
840	periodics [w->active - 1] = periodics [periodiccnt];	1092	periodics [w->active - 1] = periodics [periodiccnt];
841	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1093	downheap ((WT *)periodics, periodiccnt, w->active - 1);
842	}	1094	}
843		1095
844	ev_stop ((W)w);	1096	ev_stop (EV_A_ (W)w);
845	}	1097	}
846		1098
		1099	#ifndef SA_RESTART
		1100	# define SA_RESTART 0
		1101	#endif
		1102
847	void	1103	void
848	evsignal_start (struct ev_signal *w)	1104	ev_signal_start (EV_P_ struct ev_signal *w)
849	{	1105	{
850	if (ev_is_active (w))	1106	if (ev_is_active (w))
851	return;	1107	return;
852		1108
		1109	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1110
853	ev_start ((W)w, 1);	1111	ev_start (EV_A_ (W)w, 1);
854	array_needsize (signals, signalmax, w->signum, signals_init);	1112	array_needsize (signals, signalmax, w->signum, signals_init);
855	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1113	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
856		1114
857	if (!w->next)	1115	if (!w->next)
858	{	1116	{
859	struct sigaction sa;	1117	struct sigaction sa;
860	sa.sa_handler = sighandler;	1118	sa.sa_handler = sighandler;
861	sigfillset (&sa.sa_mask);	1119	sigfillset (&sa.sa_mask);
862	sa.sa_flags = 0;	1120	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
863	sigaction (w->signum, &sa, 0);	1121	sigaction (w->signum, &sa, 0);
864	}	1122	}
865	}	1123	}
866		1124
867	void	1125	void
868	evsignal_stop (struct ev_signal *w)	1126	ev_signal_stop (EV_P_ struct ev_signal *w)
869	{	1127	{
870	ev_clear ((W)w);	1128	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
872	return;	1130	return;
873		1131
874	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1132	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
875	ev_stop ((W)w);	1133	ev_stop (EV_A_ (W)w);
876		1134
877	if (!signals [w->signum - 1].head)	1135	if (!signals [w->signum - 1].head)
878	signal (w->signum, SIG_DFL);	1136	signal (w->signum, SIG_DFL);
879	}	1137	}
880		1138
		1139	void
881	void evidle_start (struct ev_idle *w)	1140	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1141	{
883	if (ev_is_active (w))	1142	if (ev_is_active (w))
884	return;	1143	return;
885		1144
886	ev_start ((W)w, ++idlecnt);	1145	ev_start (EV_A_ (W)w, ++idlecnt);
887	array_needsize (idles, idlemax, idlecnt, );	1146	array_needsize (idles, idlemax, idlecnt, );
888	idles [idlecnt - 1] = w;	1147	idles [idlecnt - 1] = w;
889	}	1148	}
890		1149
		1150	void
891	void evidle_stop (struct ev_idle *w)	1151	ev_idle_stop (EV_P_ struct ev_idle *w)
892	{	1152	{
893	ev_clear ((W)w);	1153	ev_clear_pending (EV_A_ (W)w);
894	if (ev_is_active (w))	1154	if (ev_is_active (w))
895	return;	1155	return;
896		1156
897	idles [w->active - 1] = idles [--idlecnt];	1157	idles [w->active - 1] = idles [--idlecnt];
898	ev_stop ((W)w);	1158	ev_stop (EV_A_ (W)w);
899	}	1159	}
900		1160
		1161	void
901	void evprepare_start (struct ev_prepare *w)	1162	ev_prepare_start (EV_P_ struct ev_prepare *w)
902	{	1163	{
903	if (ev_is_active (w))	1164	if (ev_is_active (w))
904	return;	1165	return;
905		1166
906	ev_start ((W)w, ++preparecnt);	1167	ev_start (EV_A_ (W)w, ++preparecnt);
907	array_needsize (prepares, preparemax, preparecnt, );	1168	array_needsize (prepares, preparemax, preparecnt, );
908	prepares [preparecnt - 1] = w;	1169	prepares [preparecnt - 1] = w;
909	}	1170	}
910		1171
		1172	void
911	void evprepare_stop (struct ev_prepare *w)	1173	ev_prepare_stop (EV_P_ struct ev_prepare *w)
912	{	1174	{
913	ev_clear ((W)w);	1175	ev_clear_pending (EV_A_ (W)w);
914	if (ev_is_active (w))	1176	if (ev_is_active (w))
915	return;	1177	return;
916		1178
917	prepares [w->active - 1] = prepares [--preparecnt];	1179	prepares [w->active - 1] = prepares [--preparecnt];
918	ev_stop ((W)w);	1180	ev_stop (EV_A_ (W)w);
919	}	1181	}
920		1182
		1183	void
921	void evcheck_start (struct ev_check *w)	1184	ev_check_start (EV_P_ struct ev_check *w)
922	{	1185	{
923	if (ev_is_active (w))	1186	if (ev_is_active (w))
924	return;	1187	return;
925		1188
926	ev_start ((W)w, ++checkcnt);	1189	ev_start (EV_A_ (W)w, ++checkcnt);
927	array_needsize (checks, checkmax, checkcnt, );	1190	array_needsize (checks, checkmax, checkcnt, );
928	checks [checkcnt - 1] = w;	1191	checks [checkcnt - 1] = w;
929	}	1192	}
930		1193
		1194	void
931	void evcheck_stop (struct ev_check *w)	1195	ev_check_stop (EV_P_ struct ev_check *w)
932	{	1196	{
933	ev_clear ((W)w);	1197	ev_clear_pending (EV_A_ (W)w);
934	if (ev_is_active (w))	1198	if (ev_is_active (w))
935	return;	1199	return;
936		1200
937	checks [w->active - 1] = checks [--checkcnt];	1201	checks [w->active - 1] = checks [--checkcnt];
938	ev_stop ((W)w);	1202	ev_stop (EV_A_ (W)w);
939	}	1203	}
940		1204
		1205	void
941	void evchild_start (struct ev_child *w)	1206	ev_child_start (EV_P_ struct ev_child *w)
942	{	1207	{
943	if (ev_is_active (w))	1208	if (ev_is_active (w))
944	return;	1209	return;
945		1210
946	ev_start ((W)w, 1);	1211	ev_start (EV_A_ (W)w, 1);
947	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1212	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
948	}	1213	}
949		1214
		1215	void
950	void evchild_stop (struct ev_child *w)	1216	ev_child_stop (EV_P_ struct ev_child *w)
951	{	1217	{
952	ev_clear ((W)w);	1218	ev_clear_pending (EV_A_ (W)w);
953	if (ev_is_active (w))	1219	if (ev_is_active (w))
954	return;	1220	return;
955		1221
956	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1222	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
957	ev_stop ((W)w);	1223	ev_stop (EV_A_ (W)w);
958	}	1224	}
959		1225
960	/*****************************************************************************/	1226	/*****************************************************************************/
961		1227
962	struct ev_once	1228	struct ev_once
…		…
966	void (cb)(int revents, void arg);	1232	void (cb)(int revents, void arg);
967	void *arg;	1233	void *arg;
968	};	1234	};
969		1235
970	static void	1236	static void
971	once_cb (struct ev_once *once, int revents)	1237	once_cb (EV_P_ struct ev_once *once, int revents)
972	{	1238	{
973	void (cb)(int revents, void arg) = once->cb;	1239	void (cb)(int revents, void arg) = once->cb;
974	void *arg = once->arg;	1240	void *arg = once->arg;
975		1241
976	evio_stop (&once->io);	1242	ev_io_stop (EV_A_ &once->io);
977	evtimer_stop (&once->to);	1243	ev_timer_stop (EV_A_ &once->to);
978	free (once);	1244	free (once);
979		1245
980	cb (revents, arg);	1246	cb (revents, arg);
981	}	1247	}
982		1248
983	static void	1249	static void
984	once_cb_io (struct ev_io *w, int revents)	1250	once_cb_io (EV_P_ struct ev_io *w, int revents)
985	{	1251	{
986	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1252	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
987	}	1253	}
988		1254
989	static void	1255	static void
990	once_cb_to (struct ev_timer *w, int revents)	1256	once_cb_to (EV_P_ struct ev_timer *w, int revents)
991	{	1257	{
992	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1258	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
993	}	1259	}
994		1260
995	void	1261	void
996	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1262	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
997	{	1263	{
998	struct ev_once *once = malloc (sizeof (struct ev_once));	1264	struct ev_once *once = malloc (sizeof (struct ev_once));
999		1265
1000	if (!once)	1266	if (!once)
1001	cb (EV_ERROR, arg);	1267	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1002	else	1268	else
1003	{	1269	{
1004	once->cb = cb;	1270	once->cb = cb;
1005	once->arg = arg;	1271	once->arg = arg;
1006		1272
1007	evw_init (&once->io, once_cb_io);	1273	ev_watcher_init (&once->io, once_cb_io);
1008
1009	if (fd >= 0)	1274	if (fd >= 0)
1010	{	1275	{
1011	evio_set (&once->io, fd, events);	1276	ev_io_set (&once->io, fd, events);
1012	evio_start (&once->io);	1277	ev_io_start (EV_A_ &once->io);
1013	}	1278	}
1014		1279
1015	evw_init (&once->to, once_cb_to);	1280	ev_watcher_init (&once->to, once_cb_to);
1016
1017	if (timeout >= 0.)	1281	if (timeout >= 0.)
1018	{	1282	{
1019	evtimer_set (&once->to, timeout, 0.);	1283	ev_timer_set (&once->to, timeout, 0.);
1020	evtimer_start (&once->to);	1284	ev_timer_start (EV_A_ &once->to);
1021	}	1285	}
1022	}	1286	}
1023	}	1287	}
1024		1288
1025	/*****************************************************************************/	1289	/*****************************************************************************/
…		…
1036		1300
1037	static void	1301	static void
1038	ocb (struct ev_timer *w, int revents)	1302	ocb (struct ev_timer *w, int revents)
1039	{	1303	{
1040	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1304	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1041	evtimer_stop (w);	1305	ev_timer_stop (w);
1042	evtimer_start (w);	1306	ev_timer_start (w);
1043	}	1307	}
1044		1308
1045	static void	1309	static void
1046	scb (struct ev_signal *w, int revents)	1310	scb (struct ev_signal *w, int revents)
1047	{	1311	{
1048	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1312	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1049	evio_stop (&wio);	1313	ev_io_stop (&wio);
1050	evio_start (&wio);	1314	ev_io_start (&wio);
1051	}	1315	}
1052		1316
1053	static void	1317	static void
1054	gcb (struct ev_signal *w, int revents)	1318	gcb (struct ev_signal *w, int revents)
1055	{	1319	{
…		…
1059		1323
1060	int main (void)	1324	int main (void)
1061	{	1325	{
1062	ev_init (0);	1326	ev_init (0);
1063		1327
1064	evio_init (&wio, sin_cb, 0, EV_READ);	1328	ev_io_init (&wio, sin_cb, 0, EV_READ);
1065	evio_start (&wio);	1329	ev_io_start (&wio);
1066		1330
1067	struct ev_timer t[10000];	1331	struct ev_timer t[10000];
1068		1332
1069	#if 0	1333	#if 0
1070	int i;	1334	int i;
1071	for (i = 0; i < 10000; ++i)	1335	for (i = 0; i < 10000; ++i)
1072	{	1336	{
1073	struct ev_timer *w = t + i;	1337	struct ev_timer *w = t + i;
1074	evw_init (w, ocb, i);	1338	ev_watcher_init (w, ocb, i);
1075	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);	1339	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1076	evtimer_start (w);	1340	ev_timer_start (w);
1077	if (drand48 () < 0.5)	1341	if (drand48 () < 0.5)
1078	evtimer_stop (w);	1342	ev_timer_stop (w);
1079	}	1343	}
1080	#endif	1344	#endif
1081		1345
1082	struct ev_timer t1;	1346	struct ev_timer t1;
1083	evtimer_init (&t1, ocb, 5, 10);	1347	ev_timer_init (&t1, ocb, 5, 10);
1084	evtimer_start (&t1);	1348	ev_timer_start (&t1);
1085		1349
1086	struct ev_signal sig;	1350	struct ev_signal sig;
1087	evsignal_init (&sig, scb, SIGQUIT);	1351	ev_signal_init (&sig, scb, SIGQUIT);
1088	evsignal_start (&sig);	1352	ev_signal_start (&sig);
1089		1353
1090	struct ev_check cw;	1354	struct ev_check cw;
1091	evcheck_init (&cw, gcb);	1355	ev_check_init (&cw, gcb);
1092	evcheck_start (&cw);	1356	ev_check_start (&cw);
1093		1357
1094	struct ev_idle iw;	1358	struct ev_idle iw;
1095	evidle_init (&iw, gcb);	1359	ev_idle_init (&iw, gcb);
1096	evidle_start (&iw);	1360	ev_idle_start (&iw);
1097		1361
1098	ev_loop (0);	1362	ev_loop (0);
1099		1363
1100	return 0;	1364	return 0;
1101	}	1365	}

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Comparing libev/ev.c (file contents): Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs. Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs.
Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC