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

Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 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>
…		…
36		41
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>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
41	#include <sys/time.h>	50	#include <sys/time.h>
42	#include <time.h>	51	#include <time.h>
43		52
		53	/**/
		54
44	#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
45	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
46	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
47	# endif	84	#endif
48	#endif
49		85
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
60	#endif	89	#endif
		90
		91	/**/
61		92
62	#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) */
63	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
64		97
65	#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)
66		113
67	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
70		117
71	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74
75	static int have_monotonic; /* runtime */
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		119
81	/*****************************************************************************/	120	/*****************************************************************************/
82		121
83	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
84	ev_time (void)	156	ev_time (void)
85	{	157	{
86	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
87	struct timespec ts;	159	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	162	#else
91	struct timeval tv;	163	struct timeval tv;
92	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	166	#endif
95	}	167	}
96		168
97	static ev_tstamp	169	inline ev_tstamp
98	get_clock (void)	170	get_clock (void)
99	{	171	{
100	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
101	if (have_monotonic)	173	if (expect_true (have_monotonic))
102	{	174	{
103	struct timespec ts;	175	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	178	}
107	#endif	179	#endif
108		180
109	return ev_time ();	181	return ev_time ();
110	}	182	}
111		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		191
112	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
114	{ \	194	{ \
115	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
		196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
116	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	204	cur = newcnt; \
119	}	205	}
120		206
121	/*****************************************************************************/	207	/*****************************************************************************/
122		208
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	209	static void
136	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
137	{	211	{
138	while (count--)	212	while (count--)
139	{	213	{
140	base->head = 0;	214	base->head = 0;
141	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
142	++base;	218	++base;
143	}	219	}
144	}	220	}
145		221
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void	222	static void
156	event (W w, int events)	223	event (EV_P_ W w, int events)
157	{	224	{
158	if (w->active)	225	if (w->pending)
159	{	226	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
164	}	229	}
165	}
166		230
		231	w->pending = ++pendingcnt [ABSPRI (w)];
		232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		233	pendings [ABSPRI (w)][w->pending - 1].w = w;
		234	pendings [ABSPRI (w)][w->pending - 1].events = events;
		235	}
		236
167	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
168	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
169	{	248	{
170	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	250	struct ev_io *w;
172		251
173	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	253	{
175	int ev = w->events & events;	254	int ev = w->events & events;
176		255
177	if (ev)	256	if (ev)
178	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
179	}	258	}
180	}	259	}
181		260
		261	/*****************************************************************************/
		262
182	static void	263	static void
183	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
184	{	265	{
185	int i;	266	int i;
186		267
187	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		277	events \|= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify \|\| fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
189	}	314	}
190		315
191	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
192	static void	317	static void
193	fd_recheck ()	318	fd_ebadf (EV_P)
194	{	319	{
195	int fd;	320	int fd;
196		321
197	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	323	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
		340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
202	}	356	}
203		357
204	/*****************************************************************************/	358	/*****************************************************************************/
205		359
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	360	static void
213	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
214	{	362	{
215	WT w = timers [k];	363	WT w = heap [k];
216		364
217	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
218	{	366	{
219	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
221	k >>= 1;	369	k >>= 1;
222	}	370	}
223		371
224	timers [k] = w;	372	heap [k] = w;
225	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
226		374
227	}	375	}
228		376
229	static void	377	static void
230	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
231	{	379	{
232	WT w = timers [k];	380	WT w = heap [k];
233		381
234	while (k < (N >> 1))	382	while (k < (N >> 1))
235	{	383	{
236	int j = k << 1;	384	int j = k << 1;
237		385
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	387	++j;
240		388
241	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
242	break;	390	break;
243		391
244	timers [k] = timers [j];	392	heap [k] = heap [j];
245	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
246	k = j;	394	k = j;
247	}	395	}
248		396
249	timers [k] = w;	397	heap [k] = w;
250	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
251	}	399	}
252		400
253	/*****************************************************************************/	401	/*****************************************************************************/
254		402
255	typedef struct	403	typedef struct
256	{	404	{
257	struct ev_signal *head;	405	struct ev_watcher_list *head;
258	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
259	} ANSIG;	407	} ANSIG;
260		408
261	static ANSIG *signals;	409	static ANSIG *signals;
262	static int signalmax;	410	static int signalmax;
263		411
264	static int sigpipe [2];	412	static int sigpipe [2];
265	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;
267		414
268	static void	415	static void
269	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
270	{	417	{
271	while (count--)	418	while (count--)
272	{	419	{
273	base->head = 0;	420	base->head = 0;
274	base->gotsig = 0;	421	base->gotsig = 0;
		422
275	++base;	423	++base;
276	}	424	}
277	}	425	}
278		426
279	static void	427	static void
…		…
281	{	429	{
282	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
283		431
284	if (!gotsig)	432	if (!gotsig)
285	{	433	{
		434	int old_errno = errno;
286	gotsig = 1;	435	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
288	}	438	}
289	}	439	}
290		440
291	static void	441	static void
292	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	443	{
294	struct ev_signal *w;	444	struct ev_watcher_list *w;
295	int sig;	445	int signum;
296		446
		447	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	448	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		449
300	for (sig = signalmax; sig--; )	450	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	451	if (signals [signum].gotsig)
302	{	452	{
303	signals [sig].gotsig = 0;	453	signals [signum].gotsig = 0;
304		454
305	for (w = signals [sig].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
307	}	457	}
308	}	458	}
309		459
310	static void	460	static void
311	siginit (void)	461	siginit (EV_P)
312	{	462	{
		463	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		466
316	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
319		471
320	evio_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	475	}
323		476
324	/*****************************************************************************/	477	/*****************************************************************************/
325		478
326	static struct ev_idle **idles;	479	#ifndef WIN32
327	static int idlemax, idlecnt;
328		480
329	static struct ev_prepare **prepares;	481	#ifndef WCONTINUED
330	static int preparemax, preparecnt;	482	# define WCONTINUED 0
		483	#endif
331		484
332	static struct ev_check **checks;	485	static void
333	static int checkmax, checkcnt;	486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		487	{
		488	struct ev_child *w;
		489
		490	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		491	if (w->pid == pid \|\| !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it now */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
		503	int pid, status;
		504
		505	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		506	{
		507	/* make sure we are called again until all childs have been reaped */
		508	event (EV_A_ (W)sw, EV_SIGNAL);
		509
		510	child_reap (EV_A_ sw, pid, pid, status);
		511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
		513	}
		514
		515	#endif
334		516
335	/*****************************************************************************/	517	/*****************************************************************************/
336		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
337	#if HAVE_EPOLL	522	#if EV_USE_EPOLL
338	# include "ev_epoll.c"	523	# include "ev_epoll.c"
339	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
340	#if HAVE_SELECT	528	#if EV_USE_SELECT
341	# include "ev_select.c"	529	# include "ev_select.c"
342	#endif	530	#endif
343		531
344	int ev_init (int flags)	532	int
		533	ev_version_major (void)
345	{	534	{
		535	return EV_VERSION_MAJOR;
		536	}
		537
		538	int
		539	ev_version_minor (void)
		540	{
		541	return EV_VERSION_MINOR;
		542	}
		543
		544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
		547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	\|\| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
		565	if (!method)
		566	{
346	#if HAVE_MONOTONIC	567	#if EV_USE_MONOTONIC
347	{	568	{
348	struct timespec ts;	569	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;	571	have_monotonic = 1;
351	}	572	}
352	#endif	573	#endif
353		574
354	ev_now = ev_time ();	575	rt_now = ev_time ();
355	now = get_clock ();	576	mn_now = get_clock ();
356	diff = ev_now - now;	577	now_floor = mn_now;
		578	rtmn_diff = rt_now - mn_now;
357		579
		580	if (methods == EVMETHOD_AUTO)
		581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
		584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
		590	#if EV_USE_EPOLL
		591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		595	#endif
		596	#if EV_USE_SELECT
		597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		598	#endif
		599	}
		600	}
		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/TODO/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/TODO/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
358	if (pipe (sigpipe))	676	if (pipe (sigpipe))
359	return 0;	677	return 0;
360		678
361	ev_method = EVMETHOD_NONE;	679	if (!default_loop)
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{	680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
		689	if (ev_method (EV_A))
		690	{
371	evw_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
372	siginit ();	693	siginit (EV_A);
373	}
374		694
375	return ev_method;	695	#ifndef WIN32
376	}	696	ev_signal_init (&childev, childcb, SIGCHLD);
377		697	ev_set_priority (&childev, EV_MAXPRI);
378	/*****************************************************************************/	698	ev_signal_start (EV_A_ &childev);
379		699	ev_unref (EV_A); /* child watcher should not keep loop alive */
380	void ev_prefork (void)
381	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif	700	#endif
		701	}
		702	else
		703	default_loop = 0;
		704	}
396		705
		706	return default_loop;
		707	}
		708
		709	void
		710	ev_default_destroy (void)
		711	{
		712	#if EV_MULTIPLICITY
		713	struct ev_loop *loop = default_loop;
		714	#endif
		715
		716	ev_ref (EV_A); /* child watcher */
		717	ev_signal_stop (EV_A_ &childev);
		718
		719	ev_ref (EV_A); /* signal watcher */
397	evio_stop (&sigev);	720	ev_io_stop (EV_A_ &sigev);
		721
		722	close (sigpipe [0]); sigpipe [0] = 0;
		723	close (sigpipe [1]); sigpipe [1] = 0;
		724
		725	loop_destroy (EV_A);
		726	}
		727
		728	void
		729	ev_default_fork (EV_P)
		730	{
		731	loop_fork (EV_A);
		732
		733	ev_io_stop (EV_A_ &sigev);
398	close (sigpipe [0]);	734	close (sigpipe [0]);
399	close (sigpipe [1]);	735	close (sigpipe [1]);
400	pipe (sigpipe);	736	pipe (sigpipe);
		737
		738	ev_ref (EV_A); /* signal watcher */
401	siginit ();	739	siginit (EV_A);
402	}	740	}
403		741
404	/*****************************************************************************/	742	/*****************************************************************************/
405		743
406	static void	744	static void
407	fd_reify (void)	745	call_pending (EV_P)
408	{	746	{
409	int i;	747	int pri;
410		748
411	for (i = 0; i < fdchangecnt; ++i)	749	for (pri = NUMPRI; pri--; )
412	{	750	while (pendingcnt [pri])
413	int fd = fdchanges [i];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416
417	int wev = 0;
418
419	for (w = anfd->head; w; w = w->next)
420	wev \|= w->events;
421
422	if (anfd->wev != wev)
423	{	751	{
424	method_modify (fd, anfd->wev, wev);
425	anfd->wev = wev;
426	}
427	}
428
429	fdchangecnt = 0;
430	}
431
432	static void
433	call_pending ()
434	{
435	while (pendingcnt)
436	{
437	ANPENDING *p = pendings + --pendingcnt;	752	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
438		753
439	if (p->w)	754	if (p->w)
440	{	755	{
441	p->w->pending = 0;	756	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	757	p->w->cb (EV_A_ p->w, p->events);
443	}	758	}
444	}	759	}
445	}	760	}
446		761
447	static void	762	static void
448	timers_reify ()	763	timers_reify (EV_P)
449	{	764	{
450	while (timercnt && timers [0]->at <= now)	765	while (timercnt && timers [0]->at <= mn_now)
451	{	766	{
452	struct ev_timer *w = timers [0];	767	struct ev_timer *w = timers [0];
453
454	event ((W)w, EV_TIMEOUT);
455		768
456	/* first reschedule or stop timer */	769	/* first reschedule or stop timer */
457	if (w->repeat)	770	if (w->repeat)
458	{	771	{
		772	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
459	w->at = now + w->repeat;	773	w->at = mn_now + w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));
461	downheap ((WT *)timers, timercnt, 0);	774	downheap ((WT *)timers, timercnt, 0);
462	}	775	}
463	else	776	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	777	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		778
		779	event (EV_A_ (W)w, EV_TIMEOUT);
		780	}
		781	}
		782
468	static void	783	static void
469	periodics_reify ()	784	periodics_reify (EV_P)
470	{	785	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	786	while (periodiccnt && periodics [0]->at <= rt_now)
472	{	787	{
473	struct ev_periodic *w = periodics [0];	788	struct ev_periodic *w = periodics [0];
474		789
475	/* first reschedule or stop timer */	790	/* first reschedule or stop timer */
476	if (w->interval)	791	if (w->interval)
477	{	792	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	793	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	794	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	795	downheap ((WT *)periodics, periodiccnt, 0);
481	}	796	}
482	else	797	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	798	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		799
485	event ((W)w, EV_TIMEOUT);	800	event (EV_A_ (W)w, EV_PERIODIC);
486	}	801	}
487	}	802	}
488		803
489	static void	804	static void
490	periodics_reschedule (ev_tstamp diff)	805	periodics_reschedule (EV_P)
491	{	806	{
492	int i;	807	int i;
493		808
494	/* adjust periodics after time jump */	809	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	810	for (i = 0; i < periodiccnt; ++i)
496	{	811	{
497	struct ev_periodic *w = periodics [i];	812	struct ev_periodic *w = periodics [i];
498		813
499	if (w->interval)	814	if (w->interval)
500	{	815	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	816	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
502		817
503	if (fabs (diff) >= 1e-4)	818	if (fabs (diff) >= 1e-4)
504	{	819	{
505	evperiodic_stop (w);	820	ev_periodic_stop (EV_A_ w);
506	evperiodic_start (w);	821	ev_periodic_start (EV_A_ w);
507		822
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	823	i = 0; /* restart loop, inefficient, but time jumps should be rare */
509	}	824	}
510	}	825	}
511	}	826	}
512	}	827	}
513		828
		829	inline int
		830	time_update_monotonic (EV_P)
		831	{
		832	mn_now = get_clock ();
		833
		834	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		835	{
		836	rt_now = rtmn_diff + mn_now;
		837	return 0;
		838	}
		839	else
		840	{
		841	now_floor = mn_now;
		842	rt_now = ev_time ();
		843	return 1;
		844	}
		845	}
		846
514	static void	847	static void
515	time_update ()	848	time_update (EV_P)
516	{	849	{
517	int i;	850	int i;
518		851
519	ev_now = ev_time ();	852	#if EV_USE_MONOTONIC
520
521	if (have_monotonic)	853	if (expect_true (have_monotonic))
522	{	854	{
523	ev_tstamp odiff = diff;	855	if (time_update_monotonic (EV_A))
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	856	{
527	now = get_clock ();	857	ev_tstamp odiff = rtmn_diff;
		858
		859	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		860	{
528	diff = ev_now - now;	861	rtmn_diff = rt_now - mn_now;
529		862
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)	863	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531	return; /* all is well */	864	return; /* all is well */
532		865
533	ev_now = ev_time ();	866	rt_now = ev_time ();
		867	mn_now = get_clock ();
		868	now_floor = mn_now;
		869	}
		870
		871	periodics_reschedule (EV_A);
		872	/* no timer adjustment, as the monotonic clock doesn't jump */
		873	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
534	}	874	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}	875	}
539	else	876	else
		877	#endif
540	{	878	{
541	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	879	rt_now = ev_time ();
		880
		881	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
542	{	882	{
543	periodics_reschedule (ev_now - now);	883	periodics_reschedule (EV_A);
544		884
545	/* adjust timers. this is easy, as the offset is the same for all */	885	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	886	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	887	timers [i]->at += rt_now - mn_now;
548	}	888	}
549		889
550	now = ev_now;	890	mn_now = rt_now;
551	}	891	}
552	}	892	}
553		893
554	int ev_loop_done;	894	void
		895	ev_ref (EV_P)
		896	{
		897	++activecnt;
		898	}
555		899
		900	void
		901	ev_unref (EV_P)
		902	{
		903	--activecnt;
		904	}
		905
		906	static int loop_done;
		907
		908	void
556	void ev_loop (int flags)	909	ev_loop (EV_P_ int flags)
557	{	910	{
558	double block;	911	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	912	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
560		913
561	do	914	do
562	{	915	{
563	/* queue check watchers (and execute them) */	916	/* queue check watchers (and execute them) */
564	if (checkcnt)	917	if (expect_false (preparecnt))
565	{	918	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	919	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	920	call_pending (EV_A);
568	}	921	}
569		922
570	/* update fd-related kernel structures */	923	/* update fd-related kernel structures */
571	fd_reify ();	924	fd_reify (EV_A);
572		925
573	/* calculate blocking time */	926	/* calculate blocking time */
574		927
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	928	/* we only need this for !monotonic clockor timers, but as we basically
		929	always have timers, we just calculate it always */
		930	#if EV_USE_MONOTONIC
		931	if (expect_true (have_monotonic))
		932	time_update_monotonic (EV_A);
		933	else
		934	#endif
		935	{
576	ev_now = ev_time ();	936	rt_now = ev_time ();
		937	mn_now = rt_now;
		938	}
577		939
578	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	940	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
579	block = 0.;	941	block = 0.;
580	else	942	else
581	{	943	{
582	block = MAX_BLOCKTIME;	944	block = MAX_BLOCKTIME;
583		945
584	if (timercnt)	946	if (timercnt)
585	{	947	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	948	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
587	if (block > to) block = to;	949	if (block > to) block = to;
588	}	950	}
589		951
590	if (periodiccnt)	952	if (periodiccnt)
591	{	953	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	954	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
593	if (block > to) block = to;	955	if (block > to) block = to;
594	}	956	}
595		957
596	if (block < 0.) block = 0.;	958	if (block < 0.) block = 0.;
597	}	959	}
598		960
599	method_poll (block);	961	method_poll (EV_A_ block);
600		962
601	/* update ev_now, do magic */	963	/* update rt_now, do magic */
602	time_update ();	964	time_update (EV_A);
603		965
604	/* queue pending timers and reschedule them */	966	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	967	timers_reify (EV_A); /* relative timers called last */
606	periodics_reify (); /* absolute timers called first */	968	periodics_reify (EV_A); /* absolute timers called first */
607		969
608	/* queue idle watchers unless io or timers are pending */	970	/* queue idle watchers unless io or timers are pending */
609	if (!pendingcnt)	971	if (!pendingcnt)
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	972	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		973
612	/* queue check watchers, to be executed first */	974	/* queue check watchers, to be executed first */
613	if (checkcnt)	975	if (checkcnt)
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	976	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		977
616	call_pending ();	978	call_pending (EV_A);
617	}	979	}
618	while (!ev_loop_done);	980	while (activecnt && !loop_done);
619		981
620	if (ev_loop_done != 2)	982	if (loop_done != 2)
621	ev_loop_done = 0;	983	loop_done = 0;
		984	}
		985
		986	void
		987	ev_unloop (EV_P_ int how)
		988	{
		989	loop_done = how;
622	}	990	}
623		991
624	/*****************************************************************************/	992	/*****************************************************************************/
625		993
626	static void	994	inline void
627	wlist_add (WL *head, WL elem)	995	wlist_add (WL *head, WL elem)
628	{	996	{
629	elem->next = *head;	997	elem->next = *head;
630	*head = elem;	998	*head = elem;
631	}	999	}
632		1000
633	static void	1001	inline void
634	wlist_del (WL *head, WL elem)	1002	wlist_del (WL *head, WL elem)
635	{	1003	{
636	while (*head)	1004	while (*head)
637	{	1005	{
638	if (*head == elem)	1006	if (*head == elem)
…		…
643		1011
644	head = &(*head)->next;	1012	head = &(*head)->next;
645	}	1013	}
646	}	1014	}
647		1015
648	static void	1016	inline void
649	ev_clear (W w)	1017	ev_clear_pending (EV_P_ W w)
650	{	1018	{
651	if (w->pending)	1019	if (w->pending)
652	{	1020	{
653	pendings [w->pending - 1].w = 0;	1021	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1022	w->pending = 0;
655	}	1023	}
656	}	1024	}
657		1025
658	static void	1026	inline void
659	ev_start (W w, int active)	1027	ev_start (EV_P_ W w, int active)
660	{	1028	{
		1029	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1030	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1031
661	w->active = active;	1032	w->active = active;
		1033	ev_ref (EV_A);
662	}	1034	}
663		1035
664	static void	1036	inline void
665	ev_stop (W w)	1037	ev_stop (EV_P_ W w)
666	{	1038	{
		1039	ev_unref (EV_A);
667	w->active = 0;	1040	w->active = 0;
668	}	1041	}
669		1042
670	/*****************************************************************************/	1043	/*****************************************************************************/
671		1044
672	void	1045	void
673	evio_start (struct ev_io *w)	1046	ev_io_start (EV_P_ struct ev_io *w)
674	{	1047	{
		1048	int fd = w->fd;
		1049
675	if (ev_is_active (w))	1050	if (ev_is_active (w))
676	return;	1051	return;
677		1052
678	int fd = w->fd;	1053	assert (("ev_io_start called with negative fd", fd >= 0));
679		1054
680	ev_start ((W)w, 1);	1055	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1056	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1057	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1058
684	++fdchangecnt;	1059	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1060	}
688		1061
689	void	1062	void
690	evio_stop (struct ev_io *w)	1063	ev_io_stop (EV_P_ struct ev_io *w)
691	{	1064	{
692	ev_clear ((W)w);	1065	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1066	if (!ev_is_active (w))
694	return;	1067	return;
695		1068
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1069	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1070	ev_stop (EV_A_ (W)w);
698		1071
699	++fdchangecnt;	1072	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1073	}
703		1074
704	void	1075	void
705	evtimer_start (struct ev_timer *w)	1076	ev_timer_start (EV_P_ struct ev_timer *w)
706	{	1077	{
707	if (ev_is_active (w))	1078	if (ev_is_active (w))
708	return;	1079	return;
709		1080
710	w->at += now;	1081	w->at += mn_now;
711		1082
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1083	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1084
714	ev_start ((W)w, ++timercnt);	1085	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1086	array_needsize (timers, timermax, timercnt, );
716	timers [timercnt - 1] = w;	1087	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1088	upheap ((WT *)timers, timercnt - 1);
718	}	1089	}
719		1090
720	void	1091	void
721	evtimer_stop (struct ev_timer *w)	1092	ev_timer_stop (EV_P_ struct ev_timer *w)
722	{	1093	{
723	ev_clear ((W)w);	1094	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1095	if (!ev_is_active (w))
725	return;	1096	return;
726		1097
727	if (w->active < timercnt--)	1098	if (w->active < timercnt--)
728	{	1099	{
…		…
730	downheap ((WT *)timers, timercnt, w->active - 1);	1101	downheap ((WT *)timers, timercnt, w->active - 1);
731	}	1102	}
732		1103
733	w->at = w->repeat;	1104	w->at = w->repeat;
734		1105
735	ev_stop ((W)w);	1106	ev_stop (EV_A_ (W)w);
736	}	1107	}
737		1108
738	void	1109	void
739	evtimer_again (struct ev_timer *w)	1110	ev_timer_again (EV_P_ struct ev_timer *w)
740	{	1111	{
741	if (ev_is_active (w))	1112	if (ev_is_active (w))
742	{	1113	{
743	if (w->repeat)	1114	if (w->repeat)
744	{	1115	{
745	w->at = now + w->repeat;	1116	w->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1117	downheap ((WT *)timers, timercnt, w->active - 1);
747	}	1118	}
748	else	1119	else
749	evtimer_stop (w);	1120	ev_timer_stop (EV_A_ w);
750	}	1121	}
751	else if (w->repeat)	1122	else if (w->repeat)
752	evtimer_start (w);	1123	ev_timer_start (EV_A_ w);
753	}	1124	}
754		1125
755	void	1126	void
756	evperiodic_start (struct ev_periodic *w)	1127	ev_periodic_start (EV_P_ struct ev_periodic *w)
757	{	1128	{
758	if (ev_is_active (w))	1129	if (ev_is_active (w))
759	return;	1130	return;
760		1131
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1132	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
762		1133
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1134	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)	1135	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1136	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
766		1137
767	ev_start ((W)w, ++periodiccnt);	1138	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1139	array_needsize (periodics, periodicmax, periodiccnt, );
769	periodics [periodiccnt - 1] = w;	1140	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1141	upheap ((WT *)periodics, periodiccnt - 1);
771	}	1142	}
772		1143
773	void	1144	void
774	evperiodic_stop (struct ev_periodic *w)	1145	ev_periodic_stop (EV_P_ struct ev_periodic *w)
775	{	1146	{
776	ev_clear ((W)w);	1147	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1148	if (!ev_is_active (w))
778	return;	1149	return;
779		1150
780	if (w->active < periodiccnt--)	1151	if (w->active < periodiccnt--)
781	{	1152	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1153	periodics [w->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1154	downheap ((WT *)periodics, periodiccnt, w->active - 1);
784	}	1155	}
785		1156
786	ev_stop ((W)w);	1157	ev_stop (EV_A_ (W)w);
787	}	1158	}
788		1159
789	void	1160	void
790	evsignal_start (struct ev_signal *w)	1161	ev_idle_start (EV_P_ struct ev_idle *w)
791	{	1162	{
792	if (ev_is_active (w))	1163	if (ev_is_active (w))
793	return;	1164	return;
794		1165
		1166	ev_start (EV_A_ (W)w, ++idlecnt);
		1167	array_needsize (idles, idlemax, idlecnt, );
		1168	idles [idlecnt - 1] = w;
		1169	}
		1170
		1171	void
		1172	ev_idle_stop (EV_P_ struct ev_idle *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (ev_is_active (w))
		1176	return;
		1177
		1178	idles [w->active - 1] = idles [--idlecnt];
		1179	ev_stop (EV_A_ (W)w);
		1180	}
		1181
		1182	void
		1183	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1184	{
		1185	if (ev_is_active (w))
		1186	return;
		1187
		1188	ev_start (EV_A_ (W)w, ++preparecnt);
		1189	array_needsize (prepares, preparemax, preparecnt, );
		1190	prepares [preparecnt - 1] = w;
		1191	}
		1192
		1193	void
		1194	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1195	{
		1196	ev_clear_pending (EV_A_ (W)w);
		1197	if (ev_is_active (w))
		1198	return;
		1199
		1200	prepares [w->active - 1] = prepares [--preparecnt];
		1201	ev_stop (EV_A_ (W)w);
		1202	}
		1203
		1204	void
		1205	ev_check_start (EV_P_ struct ev_check *w)
		1206	{
		1207	if (ev_is_active (w))
		1208	return;
		1209
		1210	ev_start (EV_A_ (W)w, ++checkcnt);
		1211	array_needsize (checks, checkmax, checkcnt, );
		1212	checks [checkcnt - 1] = w;
		1213	}
		1214
		1215	void
		1216	ev_check_stop (EV_P_ struct ev_check *w)
		1217	{
		1218	ev_clear_pending (EV_A_ (W)w);
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	checks [w->active - 1] = checks [--checkcnt];
		1223	ev_stop (EV_A_ (W)w);
		1224	}
		1225
		1226	#ifndef SA_RESTART
		1227	# define SA_RESTART 0
		1228	#endif
		1229
		1230	void
		1231	ev_signal_start (EV_P_ struct ev_signal *w)
		1232	{
		1233	#if EV_MULTIPLICITY
		1234	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1235	#endif
		1236	if (ev_is_active (w))
		1237	return;
		1238
		1239	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1240
795	ev_start ((W)w, 1);	1241	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1242	array_needsize (signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1243	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1244
799	if (!w->next)	1245	if (!w->next)
800	{	1246	{
801	struct sigaction sa;	1247	struct sigaction sa;
802	sa.sa_handler = sighandler;	1248	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1249	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1250	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1251	sigaction (w->signum, &sa, 0);
806	}	1252	}
807	}	1253	}
808		1254
809	void	1255	void
810	evsignal_stop (struct ev_signal *w)	1256	ev_signal_stop (EV_P_ struct ev_signal *w)
811	{	1257	{
812	ev_clear ((W)w);	1258	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1259	if (!ev_is_active (w))
814	return;	1260	return;
815		1261
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1262	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1263	ev_stop (EV_A_ (W)w);
818		1264
819	if (!signals [w->signum - 1].head)	1265	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1266	signal (w->signum, SIG_DFL);
821	}	1267	}
822		1268
823	void evidle_start (struct ev_idle *w)	1269	void
		1270	ev_child_start (EV_P_ struct ev_child *w)
824	{	1271	{
		1272	#if EV_MULTIPLICITY
		1273	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1274	#endif
825	if (ev_is_active (w))	1275	if (ev_is_active (w))
826	return;	1276	return;
827		1277
828	ev_start ((W)w, ++idlecnt);	1278	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1279	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1280	}
832		1281
833	void evidle_stop (struct ev_idle *w)	1282	void
		1283	ev_child_stop (EV_P_ struct ev_child *w)
834	{	1284	{
835	ev_clear ((W)w);	1285	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1286	if (ev_is_active (w))
837	return;	1287	return;
838		1288
839	idles [w->active - 1] = idles [--idlecnt];	1289	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1290	ev_stop (EV_A_ (W)w);
841	}
842
843	void evprepare_start (struct ev_prepare *w)
844	{
845	if (ev_is_active (w))
846	return;
847
848	ev_start ((W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );
850	prepares [preparecnt - 1] = w;
851	}
852
853	void evprepare_stop (struct ev_prepare *w)
854	{
855	ev_clear ((W)w);
856	if (ev_is_active (w))
857	return;
858
859	prepares [w->active - 1] = prepares [--preparecnt];
860	ev_stop ((W)w);
861	}
862
863	void evcheck_start (struct ev_check *w)
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );
870	checks [checkcnt - 1] = w;
871	}
872
873	void evcheck_stop (struct ev_check *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	checks [w->active - 1] = checks [--checkcnt];
880	ev_stop ((W)w);
881	}	1291	}
882		1292
883	/*****************************************************************************/	1293	/*****************************************************************************/
884		1294
885	struct ev_once	1295	struct ev_once
…		…
889	void (cb)(int revents, void arg);	1299	void (cb)(int revents, void arg);
890	void *arg;	1300	void *arg;
891	};	1301	};
892		1302
893	static void	1303	static void
894	once_cb (struct ev_once *once, int revents)	1304	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1305	{
896	void (cb)(int revents, void arg) = once->cb;	1306	void (cb)(int revents, void arg) = once->cb;
897	void *arg = once->arg;	1307	void *arg = once->arg;
898		1308
899	evio_stop (&once->io);	1309	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1310	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1311	free (once);
902		1312
903	cb (revents, arg);	1313	cb (revents, arg);
904	}	1314	}
905		1315
906	static void	1316	static void
907	once_cb_io (struct ev_io *w, int revents)	1317	once_cb_io (EV_P_ struct ev_io *w, int revents)
908	{	1318	{
909	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1319	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
910	}	1320	}
911		1321
912	static void	1322	static void
913	once_cb_to (struct ev_timer *w, int revents)	1323	once_cb_to (EV_P_ struct ev_timer *w, int revents)
914	{	1324	{
915	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1325	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
916	}	1326	}
917		1327
918	void	1328	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1329	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
920	{	1330	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1331	struct ev_once *once = malloc (sizeof (struct ev_once));
922		1332
923	if (!once)	1333	if (!once)
924	cb (EV_ERROR, arg);	1334	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
925	else	1335	else
926	{	1336	{
927	once->cb = cb;	1337	once->cb = cb;
928	once->arg = arg;	1338	once->arg = arg;
929		1339
930	evw_init (&once->io, once_cb_io);	1340	ev_watcher_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1341	if (fd >= 0)
933	{	1342	{
934	evio_set (&once->io, fd, events);	1343	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1344	ev_io_start (EV_A_ &once->io);
936	}	1345	}
937		1346
938	evw_init (&once->to, once_cb_to);	1347	ev_watcher_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1348	if (timeout >= 0.)
941	{	1349	{
942	evtimer_set (&once->to, timeout, 0.);	1350	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1351	ev_timer_start (EV_A_ &once->to);
944	}	1352	}
945	}	1353	}
946	}	1354	}
947		1355
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}
1025
1026	#endif
1027
1028
1029
1030

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Comparing libev/ev.c (file contents): Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs. Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC