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

Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 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	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	32	# include "config.h"
31	#endif	33	#endif
32		34
33	#include <math.h>	35	#include <math.h>
34	#include <stdlib.h>	36	#include <stdlib.h>
…		…
40	#include <stdio.h>	42	#include <stdio.h>
41		43
42	#include <assert.h>	44	#include <assert.h>
43	#include <errno.h>	45	#include <errno.h>
44	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
45	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
46	#include <sys/time.h>	50	#include <sys/time.h>
47	#include <time.h>	51	#include <time.h>
48		52
		53	/**/
		54
49	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	57	#endif
54		58
55	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
57	#endif	61	#endif
58		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
59	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
61	#endif	69	#endif
62		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
63	#ifndef EV_USE_REALTIME	75	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	76	# define EV_USE_REALTIME 1
65	#endif	77	#endif
		78
		79	/**/
		80
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
		89	#endif
		90
		91	/**/
66		92
67	#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) */
68	#define MAX_BLOCKTIME 59.731	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#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 */
70		97
71	#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)
72		113
73	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
76		117
77	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80
81	static int have_monotonic; /* runtime */
82
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		119
87	/*****************************************************************************/	120	/*****************************************************************************/
88		121
89	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
90	ev_time (void)	156	ev_time (void)
91	{	157	{
92	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
93	struct timespec ts;	159	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	166	#endif
101	}	167	}
102		168
103	static ev_tstamp	169	inline ev_tstamp
104	get_clock (void)	170	get_clock (void)
105	{	171	{
106	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
107	if (have_monotonic)	173	if (expect_true (have_monotonic))
108	{	174	{
109	struct timespec ts;	175	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	178	}
113	#endif	179	#endif
114		180
115	return ev_time ();	181	return ev_time ();
116	}	182	}
117		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
118	#define array_roundsize(base,n) ((n) \| 4 & ~3)	190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
119		191
120	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
121	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
122	{ \	194	{ \
123	int newcnt = cur; \	195	int newcnt = cur; \
124	do \	196	do \
125	{ \	197	{ \
126	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
132	cur = newcnt; \	204	cur = newcnt; \
133	}	205	}
134		206
135	/*****************************************************************************/	207	/*****************************************************************************/
136		208
137	typedef struct
138	{
139	struct ev_io *head;
140	int events;
141	} ANFD;
142
143	static ANFD *anfds;
144	static int anfdmax;
145
146	static void	209	static void
147	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
148	{	211	{
149	while (count--)	212	while (count--)
150	{	213	{
151	base->head = 0;	214	base->head = 0;
152	base->events = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
153	++base;	218	++base;
154	}	219	}
155	}	220	}
156		221
157	typedef struct
158	{
159	W w;
160	int events;
161	} ANPENDING;
162
163	static ANPENDING *pendings;
164	static int pendingmax, pendingcnt;
165
166	static void	222	static void
167	event (W w, int events)	223	event (EV_P_ W w, int events)
168	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
		229	}
		230
169	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
170	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
171	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
173	}	235	}
174		236
175	static void	237	static void
176	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
177	{	239	{
178	int i;	240	int i;
179		241
180	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
181	event (events [i], type);	243	event (EV_A_ events [i], type);
182	}	244	}
183		245
184	static void	246	static void
185	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
186	{	248	{
187	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
188	struct ev_io *w;	250	struct ev_io *w;
189		251
190	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
191	{	253	{
192	int ev = w->events & events;	254	int ev = w->events & events;
193		255
194	if (ev)	256	if (ev)
195	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
196	}	258	}
197	}	259	}
198		260
199	/*****************************************************************************/	261	/*****************************************************************************/
200		262
201	static int *fdchanges;
202	static int fdchangemax, fdchangecnt;
203
204	static void	263	static void
205	fd_reify (void)	264	fd_reify (EV_P)
206	{	265	{
207	int i;	266	int i;
208		267
209	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
210	{	269	{
…		…
212	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
213	struct ev_io *w;	272	struct ev_io *w;
214		273
215	int events = 0;	274	int events = 0;
216		275
217	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
218	events \|= w->events;	277	events \|= w->events;
219		278
220	anfd->events &= ~EV_REIFY;	279	anfd->reify = 0;
221		280
222	if (anfd->events != events)	281	if (anfd->events != events)
223	{	282	{
224	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
225	anfd->events = events;	284	anfd->events = events;
226	}	285	}
227	}	286	}
228		287
229	fdchangecnt = 0;	288	fdchangecnt = 0;
230	}	289	}
231		290
232	static void	291	static void
233	fd_change (int fd)	292	fd_change (EV_P_ int fd)
234	{	293	{
235	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	294	if (anfds [fd].reify \|\| fdchangecnt < 0)
236	return;	295	return;
237		296
238	anfds [fd].events \|= EV_REIFY;	297	anfds [fd].reify = 1;
239		298
240	++fdchangecnt;	299	++fdchangecnt;
241	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
242	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
243	}	302	}
244		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
		314	}
		315
245	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
246	static void	317	static void
247	fd_recheck (void)	318	fd_ebadf (EV_P)
248	{	319	{
249	int fd;	320	int fd;
250		321
251	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
252	if (anfds [fd].events)	323	if (anfds [fd].events)
253	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
254	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
255	{	336	{
256	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	337	close (fd);
257	ev_io_stop (anfds [fd].head);	338	fd_kill (EV_A_ fd);
		339	return;
258	}	340	}
259	}	341	}
260		342
261	/*****************************************************************************/	343	/*****************************************************************************/
262		344
263	static struct ev_timer **timers;
264	static int timermax, timercnt;
265
266	static struct ev_periodic **periodics;
267	static int periodicmax, periodiccnt;
268
269	static void	345	static void
270	upheap (WT *timers, int k)	346	upheap (WT *heap, int k)
271	{	347	{
272	WT w = timers [k];	348	WT w = heap [k];
273		349
274	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
275	{	351	{
276	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
277	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
278	k >>= 1;	354	k >>= 1;
279	}	355	}
280		356
281	timers [k] = w;	357	heap [k] = w;
282	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
283		359
284	}	360	}
285		361
286	static void	362	static void
287	downheap (WT *timers, int N, int k)	363	downheap (WT *heap, int N, int k)
288	{	364	{
289	WT w = timers [k];	365	WT w = heap [k];
290		366
291	while (k < (N >> 1))	367	while (k < (N >> 1))
292	{	368	{
293	int j = k << 1;	369	int j = k << 1;
294		370
295	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296	++j;	372	++j;
297		373
298	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
299	break;	375	break;
300		376
301	timers [k] = timers [j];	377	heap [k] = heap [j];
302	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
303	k = j;	379	k = j;
304	}	380	}
305		381
306	timers [k] = w;	382	heap [k] = w;
307	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
308	}	384	}
309		385
310	/*****************************************************************************/	386	/*****************************************************************************/
311		387
312	typedef struct	388	typedef struct
313	{	389	{
314	struct ev_signal *head;	390	struct ev_watcher_list *head;
315	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
316	} ANSIG;	392	} ANSIG;
317		393
318	static ANSIG *signals;	394	static ANSIG *signals;
319	static int signalmax;	395	static int signalmax;
320		396
321	static int sigpipe [2];	397	static int sigpipe [2];
322	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
323	static struct ev_io sigev;
324		399
325	static void	400	static void
326	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
327	{	402	{
328	while (count--)	403	while (count--)
329	{	404	{
330	base->head = 0;	405	base->head = 0;
331	base->gotsig = 0;	406	base->gotsig = 0;
		407
332	++base;	408	++base;
333	}	409	}
334	}	410	}
335		411
336	static void	412	static void
…		…
338	{	414	{
339	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
340		416
341	if (!gotsig)	417	if (!gotsig)
342	{	418	{
		419	int old_errno = errno;
343	gotsig = 1;	420	gotsig = 1;
344	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
345	}	423	}
346	}	424	}
347		425
348	static void	426	static void
349	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
350	{	428	{
351	struct ev_signal *w;	429	struct ev_watcher_list *w;
352	int sig;	430	int signum;
353		431
		432	read (sigpipe [0], &revents, 1);
354	gotsig = 0;	433	gotsig = 0;
355	read (sigpipe [0], &revents, 1);
356		434
357	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
358	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
359	{	437	{
360	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
361		439
362	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
363	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
364	}	442	}
365	}	443	}
366		444
367	static void	445	static void
368	siginit (void)	446	siginit (EV_P)
369	{	447	{
		448	#ifndef WIN32
370	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
371	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372		451
373	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
374	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
375	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
376		456
377	ev_io_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
378	ev_io_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
379	}	460	}
380		461
381	/*****************************************************************************/	462	/*****************************************************************************/
382		463
383	static struct ev_idle **idles;	464	#ifndef WIN32
384	static int idlemax, idlecnt;
385
386	static struct ev_prepare **prepares;
387	static int preparemax, preparecnt;
388
389	static struct ev_check **checks;
390	static int checkmax, checkcnt;
391
392	/*****************************************************************************/
393
394	static struct ev_child *childs [PID_HASHSIZE];
395	static struct ev_signal childev;
396		465
397	#ifndef WCONTINUED	466	#ifndef WCONTINUED
398	# define WCONTINUED 0	467	# define WCONTINUED 0
399	#endif	468	#endif
400		469
401	static void	470	static void
402	childcb (struct ev_signal *sw, int revents)	471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403	{	472	{
404	struct ev_child *w;	473	struct ev_child *w;
		474
		475	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		476	if (w->pid == pid \|\| !w->pid)
		477	{
		478	w->priority = sw->priority; /* need to do it now */
		479	w->rpid = pid;
		480	w->rstatus = status;
		481	event (EV_A_ (W)w, EV_CHILD);
		482	}
		483	}
		484
		485	static void
		486	childcb (EV_P_ struct ev_signal *sw, int revents)
		487	{
405	int pid, status;	488	int pid, status;
406		489
407	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	490	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
408	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	491	{
409	if (w->pid == pid \|\| w->pid == -1)	492	/* make sure we are called again until all childs have been reaped */
410	{	493	event (EV_A_ (W)sw, EV_SIGNAL);
411	w->status = status;	494
412	event ((W)w, EV_CHILD);	495	child_reap (EV_A_ sw, pid, pid, status);
413	}	496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
414	}	498	}
		499
		500	#endif
415		501
416	/*****************************************************************************/	502	/*****************************************************************************/
417		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
418	#if EV_USE_EPOLL	507	#if EV_USE_EPOLL
419	# include "ev_epoll.c"	508	# include "ev_epoll.c"
420	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
421	#if EV_USE_SELECT	513	#if EV_USE_SELECT
422	# include "ev_select.c"	514	# include "ev_select.c"
423	#endif	515	#endif
424		516
425	int	517	int
…		…
432	ev_version_minor (void)	524	ev_version_minor (void)
433	{	525	{
434	return EV_VERSION_MINOR;	526	return EV_VERSION_MINOR;
435	}	527	}
436		528
437	int ev_init (int flags)	529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
438	{	532	{
		533	#ifdef WIN32
		534	return 0;
		535	#else
		536	return getuid () != geteuid ()
		537	\|\| getgid () != getegid ();
		538	#endif
		539	}
		540
		541	int
		542	ev_method (EV_P)
		543	{
		544	return method;
		545	}
		546
		547	inline int
		548	loop_init (EV_P_ int methods)
		549	{
439	if (!ev_method)	550	if (!method)
440	{	551	{
441	#if EV_USE_MONOTONIC	552	#if EV_USE_MONOTONIC
442	{	553	{
443	struct timespec ts;	554	struct timespec ts;
444	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445	have_monotonic = 1;	556	have_monotonic = 1;
446	}	557	}
447	#endif	558	#endif
448		559
449	ev_now = ev_time ();	560	rt_now = ev_time ();
450	now = get_clock ();	561	mn_now = get_clock ();
		562	now_floor = mn_now;
451	diff = ev_now - now;	563	rtmn_diff = rt_now - mn_now;
452		564
453	if (pipe (sigpipe))	565	if (pipe (sigpipe))
454	return 0;	566	return 0;
455		567
		568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
456	ev_method = EVMETHOD_NONE;	572	methods = EVMETHOD_ANY;
		573
		574	method = 0;
		575	#if EV_USE_KQUEUE
		576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		577	#endif
457	#if EV_USE_EPOLL	578	#if EV_USE_EPOLL
458	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
459	#endif	583	#endif
460	#if EV_USE_SELECT	584	#if EV_USE_SELECT
461	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
462	#endif	586	#endif
463		587
464	if (ev_method)	588	if (method)
465	{	589	{
466	ev_watcher_init (&sigev, sigcb);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
467	siginit ();	592	siginit (EV_A);
468		593
		594	#ifndef WIN32
469	ev_signal_init (&childev, childcb, SIGCHLD);	595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
470	ev_signal_start (&childev);	597	ev_signal_start (EV_A_ &childev);
		598	ev_unref (EV_A); /* child watcher should not keep loop alive */
		599	#endif
471	}	600	}
472	}	601	}
473		602
474	return ev_method;	603	return method;
475	}	604	}
		605
		606	#if EV_MULTIPLICITY
		607
		608	struct ev_loop *
		609	ev_loop_new (int methods)
		610	{
		611	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		612
		613	if (loop_init (EV_A_ methods))
		614	return loop;
		615
		616	ev_loop_delete (loop);
		617
		618	return 0;
		619	}
		620
		621	void
		622	ev_loop_delete (EV_P)
		623	{
		624	/TODO/
		625	free (loop);
		626	}
		627
		628	#else
		629
		630	int
		631	ev_init (int methods)
		632	{
		633	return loop_init (methods);
		634	}
		635
		636	#endif
476		637
477	/*****************************************************************************/	638	/*****************************************************************************/
478		639
479	void	640	void
480	ev_prefork (void)	641	ev_fork_prepare (void)
481	{	642	{
482	/* nop */	643	/* nop */
483	}	644	}
484		645
485	void	646	void
486	ev_postfork_parent (void)	647	ev_fork_parent (void)
487	{	648	{
488	/* nop */	649	/* nop */
489	}	650	}
490		651
491	void	652	void
492	ev_postfork_child (void)	653	ev_fork_child (void)
493	{	654	{
		655	/TODO/
		656	#if !EV_MULTIPLICITY
494	#if EV_USE_EPOLL	657	#if EV_USE_EPOLL
495	if (ev_method == EVMETHOD_EPOLL)	658	if (method == EVMETHOD_EPOLL)
496	epoll_postfork_child ();	659	epoll_postfork_child (EV_A);
497	#endif	660	#endif
498		661
499	ev_io_stop (&sigev);	662	ev_io_stop (EV_A_ &sigev);
500	close (sigpipe [0]);	663	close (sigpipe [0]);
501	close (sigpipe [1]);	664	close (sigpipe [1]);
502	pipe (sigpipe);	665	pipe (sigpipe);
503	siginit ();	666	siginit (EV_A);
		667	#endif
504	}	668	}
505		669
506	/*****************************************************************************/	670	/*****************************************************************************/
507		671
508	static void	672	static void
509	call_pending (void)	673	call_pending (EV_P)
510	{	674	{
		675	int pri;
		676
		677	for (pri = NUMPRI; pri--; )
511	while (pendingcnt)	678	while (pendingcnt [pri])
512	{	679	{
513	ANPENDING *p = pendings + --pendingcnt;	680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514		681
515	if (p->w)	682	if (p->w)
516	{	683	{
517	p->w->pending = 0;	684	p->w->pending = 0;
518	p->w->cb (p->w, p->events);	685	p->w->cb (EV_A_ p->w, p->events);
519	}	686	}
520	}	687	}
521	}	688	}
522		689
523	static void	690	static void
524	timers_reify (void)	691	timers_reify (EV_P)
525	{	692	{
526	while (timercnt && timers [0]->at <= now)	693	while (timercnt && timers [0]->at <= mn_now)
527	{	694	{
528	struct ev_timer *w = timers [0];	695	struct ev_timer *w = timers [0];
529		696
530	/* first reschedule or stop timer */	697	/* first reschedule or stop timer */
531	if (w->repeat)	698	if (w->repeat)
532	{	699	{
		700	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	701	w->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	702	downheap ((WT *)timers, timercnt, 0);
536	}	703	}
537	else	704	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	705	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539		706
540	event ((W)w, EV_TIMEOUT);	707	event (EV_A_ (W)w, EV_TIMEOUT);
541	}	708	}
542	}	709	}
543		710
544	static void	711	static void
545	periodics_reify (void)	712	periodics_reify (EV_P)
546	{	713	{
547	while (periodiccnt && periodics [0]->at <= ev_now)	714	while (periodiccnt && periodics [0]->at <= rt_now)
548	{	715	{
549	struct ev_periodic *w = periodics [0];	716	struct ev_periodic *w = periodics [0];
550		717
551	/* first reschedule or stop timer */	718	/* first reschedule or stop timer */
552	if (w->interval)	719	if (w->interval)
553	{	720	{
554	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	721	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
555	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	722	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
556	downheap ((WT *)periodics, periodiccnt, 0);	723	downheap ((WT *)periodics, periodiccnt, 0);
557	}	724	}
558	else	725	else
559	ev_periodic_stop (w); /* nonrepeating: stop timer */	726	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560		727
561	event ((W)w, EV_TIMEOUT);	728	event (EV_A_ (W)w, EV_PERIODIC);
562	}	729	}
563	}	730	}
564		731
565	static void	732	static void
566	periodics_reschedule (ev_tstamp diff)	733	periodics_reschedule (EV_P)
567	{	734	{
568	int i;	735	int i;
569		736
570	/* adjust periodics after time jump */	737	/* adjust periodics after time jump */
571	for (i = 0; i < periodiccnt; ++i)	738	for (i = 0; i < periodiccnt; ++i)
572	{	739	{
573	struct ev_periodic *w = periodics [i];	740	struct ev_periodic *w = periodics [i];
574		741
575	if (w->interval)	742	if (w->interval)
576	{	743	{
577	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	744	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
578		745
579	if (fabs (diff) >= 1e-4)	746	if (fabs (diff) >= 1e-4)
580	{	747	{
581	ev_periodic_stop (w);	748	ev_periodic_stop (EV_A_ w);
582	ev_periodic_start (w);	749	ev_periodic_start (EV_A_ w);
583		750
584	i = 0; /* restart loop, inefficient, but time jumps should be rare */	751	i = 0; /* restart loop, inefficient, but time jumps should be rare */
585	}	752	}
586	}	753	}
587	}	754	}
588	}	755	}
589		756
		757	inline int
		758	time_update_monotonic (EV_P)
		759	{
		760	mn_now = get_clock ();
		761
		762	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		763	{
		764	rt_now = rtmn_diff + mn_now;
		765	return 0;
		766	}
		767	else
		768	{
		769	now_floor = mn_now;
		770	rt_now = ev_time ();
		771	return 1;
		772	}
		773	}
		774
590	static void	775	static void
591	time_update (void)	776	time_update (EV_P)
592	{	777	{
593	int i;	778	int i;
594		779
595	ev_now = ev_time ();	780	#if EV_USE_MONOTONIC
596
597	if (have_monotonic)	781	if (expect_true (have_monotonic))
598	{	782	{
599	ev_tstamp odiff = diff;	783	if (time_update_monotonic (EV_A))
600
601	for (i = 4; --i; ) /* loop a few times, before making important decisions */
602	{	784	{
603	now = get_clock ();	785	ev_tstamp odiff = rtmn_diff;
		786
		787	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		788	{
604	diff = ev_now - now;	789	rtmn_diff = rt_now - mn_now;
605		790
606	if (fabs (odiff - diff) < MIN_TIMEJUMP)	791	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
607	return; /* all is well */	792	return; /* all is well */
608		793
609	ev_now = ev_time ();	794	rt_now = ev_time ();
		795	mn_now = get_clock ();
		796	now_floor = mn_now;
		797	}
		798
		799	periodics_reschedule (EV_A);
		800	/* no timer adjustment, as the monotonic clock doesn't jump */
		801	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
610	}	802	}
611
612	periodics_reschedule (diff - odiff);
613	/* no timer adjustment, as the monotonic clock doesn't jump */
614	}	803	}
615	else	804	else
		805	#endif
616	{	806	{
617	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	807	rt_now = ev_time ();
		808
		809	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
618	{	810	{
619	periodics_reschedule (ev_now - now);	811	periodics_reschedule (EV_A);
620		812
621	/* adjust timers. this is easy, as the offset is the same for all */	813	/* adjust timers. this is easy, as the offset is the same for all */
622	for (i = 0; i < timercnt; ++i)	814	for (i = 0; i < timercnt; ++i)
623	timers [i]->at += diff;	815	timers [i]->at += rt_now - mn_now;
624	}	816	}
625		817
626	now = ev_now;	818	mn_now = rt_now;
627	}	819	}
628	}	820	}
629		821
630	int ev_loop_done;	822	void
		823	ev_ref (EV_P)
		824	{
		825	++activecnt;
		826	}
631		827
		828	void
		829	ev_unref (EV_P)
		830	{
		831	--activecnt;
		832	}
		833
		834	static int loop_done;
		835
		836	void
632	void ev_loop (int flags)	837	ev_loop (EV_P_ int flags)
633	{	838	{
634	double block;	839	double block;
635	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	840	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
636		841
637	do	842	do
638	{	843	{
639	/* queue check watchers (and execute them) */	844	/* queue check watchers (and execute them) */
640	if (preparecnt)	845	if (expect_false (preparecnt))
641	{	846	{
642	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	847	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643	call_pending ();	848	call_pending (EV_A);
644	}	849	}
645		850
646	/* update fd-related kernel structures */	851	/* update fd-related kernel structures */
647	fd_reify ();	852	fd_reify (EV_A);
648		853
649	/* calculate blocking time */	854	/* calculate blocking time */
650		855
651	/* we only need this for !monotonic clockor timers, but as we basically	856	/* we only need this for !monotonic clockor timers, but as we basically
652	always have timers, we just calculate it always */	857	always have timers, we just calculate it always */
		858	#if EV_USE_MONOTONIC
		859	if (expect_true (have_monotonic))
		860	time_update_monotonic (EV_A);
		861	else
		862	#endif
		863	{
653	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = rt_now;
		866	}
654		867
655	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	868	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
656	block = 0.;	869	block = 0.;
657	else	870	else
658	{	871	{
659	block = MAX_BLOCKTIME;	872	block = MAX_BLOCKTIME;
660		873
661	if (timercnt)	874	if (timercnt)
662	{	875	{
663	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	876	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
664	if (block > to) block = to;	877	if (block > to) block = to;
665	}	878	}
666		879
667	if (periodiccnt)	880	if (periodiccnt)
668	{	881	{
669	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	882	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
670	if (block > to) block = to;	883	if (block > to) block = to;
671	}	884	}
672		885
673	if (block < 0.) block = 0.;	886	if (block < 0.) block = 0.;
674	}	887	}
675		888
676	method_poll (block);	889	method_poll (EV_A_ block);
677		890
678	/* update ev_now, do magic */	891	/* update rt_now, do magic */
679	time_update ();	892	time_update (EV_A);
680		893
681	/* queue pending timers and reschedule them */	894	/* queue pending timers and reschedule them */
682	timers_reify (); /* relative timers called last */	895	timers_reify (EV_A); /* relative timers called last */
683	periodics_reify (); /* absolute timers called first */	896	periodics_reify (EV_A); /* absolute timers called first */
684		897
685	/* queue idle watchers unless io or timers are pending */	898	/* queue idle watchers unless io or timers are pending */
686	if (!pendingcnt)	899	if (!pendingcnt)
687	queue_events ((W *)idles, idlecnt, EV_IDLE);	900	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688		901
689	/* queue check watchers, to be executed first */	902	/* queue check watchers, to be executed first */
690	if (checkcnt)	903	if (checkcnt)
691	queue_events ((W *)checks, checkcnt, EV_CHECK);	904	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692		905
693	call_pending ();	906	call_pending (EV_A);
694	}	907	}
695	while (!ev_loop_done);	908	while (activecnt && !loop_done);
696		909
697	if (ev_loop_done != 2)	910	if (loop_done != 2)
698	ev_loop_done = 0;	911	loop_done = 0;
		912	}
		913
		914	void
		915	ev_unloop (EV_P_ int how)
		916	{
		917	loop_done = how;
699	}	918	}
700		919
701	/*****************************************************************************/	920	/*****************************************************************************/
702		921
703	static void	922	inline void
704	wlist_add (WL *head, WL elem)	923	wlist_add (WL *head, WL elem)
705	{	924	{
706	elem->next = *head;	925	elem->next = *head;
707	*head = elem;	926	*head = elem;
708	}	927	}
709		928
710	static void	929	inline void
711	wlist_del (WL *head, WL elem)	930	wlist_del (WL *head, WL elem)
712	{	931	{
713	while (*head)	932	while (*head)
714	{	933	{
715	if (*head == elem)	934	if (*head == elem)
…		…
720		939
721	head = &(*head)->next;	940	head = &(*head)->next;
722	}	941	}
723	}	942	}
724		943
725	static void	944	inline void
726	ev_clear (W w)	945	ev_clear_pending (EV_P_ W w)
727	{	946	{
728	if (w->pending)	947	if (w->pending)
729	{	948	{
730	pendings [w->pending - 1].w = 0;	949	pendings [ABSPRI (w)][w->pending - 1].w = 0;
731	w->pending = 0;	950	w->pending = 0;
732	}	951	}
733	}	952	}
734		953
735	static void	954	inline void
736	ev_start (W w, int active)	955	ev_start (EV_P_ W w, int active)
737	{	956	{
		957	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		958	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		959
738	w->active = active;	960	w->active = active;
		961	ev_ref (EV_A);
739	}	962	}
740		963
741	static void	964	inline void
742	ev_stop (W w)	965	ev_stop (EV_P_ W w)
743	{	966	{
		967	ev_unref (EV_A);
744	w->active = 0;	968	w->active = 0;
745	}	969	}
746		970
747	/*****************************************************************************/	971	/*****************************************************************************/
748		972
749	void	973	void
750	ev_io_start (struct ev_io *w)	974	ev_io_start (EV_P_ struct ev_io *w)
751	{	975	{
		976	int fd = w->fd;
		977
752	if (ev_is_active (w))	978	if (ev_is_active (w))
753	return;	979	return;
754		980
755	int fd = w->fd;	981	assert (("ev_io_start called with negative fd", fd >= 0));
756		982
757	ev_start ((W)w, 1);	983	ev_start (EV_A_ (W)w, 1);
758	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	984	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
759	wlist_add ((WL *)&anfds[fd].head, (WL)w);	985	wlist_add ((WL *)&anfds[fd].head, (WL)w);
760		986
761	fd_change (fd);	987	fd_change (EV_A_ fd);
762	}	988	}
763		989
764	void	990	void
765	ev_io_stop (struct ev_io *w)	991	ev_io_stop (EV_P_ struct ev_io *w)
766	{	992	{
767	ev_clear ((W)w);	993	ev_clear_pending (EV_A_ (W)w);
768	if (!ev_is_active (w))	994	if (!ev_is_active (w))
769	return;	995	return;
770		996
771	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	997	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772	ev_stop ((W)w);	998	ev_stop (EV_A_ (W)w);
773		999
774	fd_change (w->fd);	1000	fd_change (EV_A_ w->fd);
775	}	1001	}
776		1002
777	void	1003	void
778	ev_timer_start (struct ev_timer *w)	1004	ev_timer_start (EV_P_ struct ev_timer *w)
779	{	1005	{
780	if (ev_is_active (w))	1006	if (ev_is_active (w))
781	return;	1007	return;
782		1008
783	w->at += now;	1009	w->at += mn_now;
784		1010
785	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1011	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
786		1012
787	ev_start ((W)w, ++timercnt);	1013	ev_start (EV_A_ (W)w, ++timercnt);
788	array_needsize (timers, timermax, timercnt, );	1014	array_needsize (timers, timermax, timercnt, );
789	timers [timercnt - 1] = w;	1015	timers [timercnt - 1] = w;
790	upheap ((WT *)timers, timercnt - 1);	1016	upheap ((WT *)timers, timercnt - 1);
791	}	1017	}
792		1018
793	void	1019	void
794	ev_timer_stop (struct ev_timer *w)	1020	ev_timer_stop (EV_P_ struct ev_timer *w)
795	{	1021	{
796	ev_clear ((W)w);	1022	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1023	if (!ev_is_active (w))
798	return;	1024	return;
799		1025
800	if (w->active < timercnt--)	1026	if (w->active < timercnt--)
801	{	1027	{
…		…
803	downheap ((WT *)timers, timercnt, w->active - 1);	1029	downheap ((WT *)timers, timercnt, w->active - 1);
804	}	1030	}
805		1031
806	w->at = w->repeat;	1032	w->at = w->repeat;
807		1033
808	ev_stop ((W)w);	1034	ev_stop (EV_A_ (W)w);
809	}	1035	}
810		1036
811	void	1037	void
812	ev_timer_again (struct ev_timer *w)	1038	ev_timer_again (EV_P_ struct ev_timer *w)
813	{	1039	{
814	if (ev_is_active (w))	1040	if (ev_is_active (w))
815	{	1041	{
816	if (w->repeat)	1042	if (w->repeat)
817	{	1043	{
818	w->at = now + w->repeat;	1044	w->at = mn_now + w->repeat;
819	downheap ((WT *)timers, timercnt, w->active - 1);	1045	downheap ((WT *)timers, timercnt, w->active - 1);
820	}	1046	}
821	else	1047	else
822	ev_timer_stop (w);	1048	ev_timer_stop (EV_A_ w);
823	}	1049	}
824	else if (w->repeat)	1050	else if (w->repeat)
825	ev_timer_start (w);	1051	ev_timer_start (EV_A_ w);
826	}	1052	}
827		1053
828	void	1054	void
829	ev_periodic_start (struct ev_periodic *w)	1055	ev_periodic_start (EV_P_ struct ev_periodic *w)
830	{	1056	{
831	if (ev_is_active (w))	1057	if (ev_is_active (w))
832	return;	1058	return;
833		1059
834	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1060	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
835		1061
836	/* this formula differs from the one in periodic_reify because we do not always round up */	1062	/* this formula differs from the one in periodic_reify because we do not always round up */
837	if (w->interval)	1063	if (w->interval)
838	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1064	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
839		1065
840	ev_start ((W)w, ++periodiccnt);	1066	ev_start (EV_A_ (W)w, ++periodiccnt);
841	array_needsize (periodics, periodicmax, periodiccnt, );	1067	array_needsize (periodics, periodicmax, periodiccnt, );
842	periodics [periodiccnt - 1] = w;	1068	periodics [periodiccnt - 1] = w;
843	upheap ((WT *)periodics, periodiccnt - 1);	1069	upheap ((WT *)periodics, periodiccnt - 1);
844	}	1070	}
845		1071
846	void	1072	void
847	ev_periodic_stop (struct ev_periodic *w)	1073	ev_periodic_stop (EV_P_ struct ev_periodic *w)
848	{	1074	{
849	ev_clear ((W)w);	1075	ev_clear_pending (EV_A_ (W)w);
850	if (!ev_is_active (w))	1076	if (!ev_is_active (w))
851	return;	1077	return;
852		1078
853	if (w->active < periodiccnt--)	1079	if (w->active < periodiccnt--)
854	{	1080	{
855	periodics [w->active - 1] = periodics [periodiccnt];	1081	periodics [w->active - 1] = periodics [periodiccnt];
856	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1082	downheap ((WT *)periodics, periodiccnt, w->active - 1);
857	}	1083	}
858		1084
859	ev_stop ((W)w);	1085	ev_stop (EV_A_ (W)w);
860	}	1086	}
861		1087
		1088	#ifndef SA_RESTART
		1089	# define SA_RESTART 0
		1090	#endif
		1091
862	void	1092	void
863	ev_signal_start (struct ev_signal *w)	1093	ev_signal_start (EV_P_ struct ev_signal *w)
864	{	1094	{
865	if (ev_is_active (w))	1095	if (ev_is_active (w))
866	return;	1096	return;
867		1097
		1098	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1099
868	ev_start ((W)w, 1);	1100	ev_start (EV_A_ (W)w, 1);
869	array_needsize (signals, signalmax, w->signum, signals_init);	1101	array_needsize (signals, signalmax, w->signum, signals_init);
870	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1102	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871		1103
872	if (!w->next)	1104	if (!w->next)
873	{	1105	{
874	struct sigaction sa;	1106	struct sigaction sa;
875	sa.sa_handler = sighandler;	1107	sa.sa_handler = sighandler;
876	sigfillset (&sa.sa_mask);	1108	sigfillset (&sa.sa_mask);
877	sa.sa_flags = 0;	1109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878	sigaction (w->signum, &sa, 0);	1110	sigaction (w->signum, &sa, 0);
879	}	1111	}
880	}	1112	}
881		1113
882	void	1114	void
883	ev_signal_stop (struct ev_signal *w)	1115	ev_signal_stop (EV_P_ struct ev_signal *w)
884	{	1116	{
885	ev_clear ((W)w);	1117	ev_clear_pending (EV_A_ (W)w);
886	if (!ev_is_active (w))	1118	if (!ev_is_active (w))
887	return;	1119	return;
888		1120
889	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1121	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890	ev_stop ((W)w);	1122	ev_stop (EV_A_ (W)w);
891		1123
892	if (!signals [w->signum - 1].head)	1124	if (!signals [w->signum - 1].head)
893	signal (w->signum, SIG_DFL);	1125	signal (w->signum, SIG_DFL);
894	}	1126	}
895		1127
896	void	1128	void
897	ev_idle_start (struct ev_idle *w)	1129	ev_idle_start (EV_P_ struct ev_idle *w)
898	{	1130	{
899	if (ev_is_active (w))	1131	if (ev_is_active (w))
900	return;	1132	return;
901		1133
902	ev_start ((W)w, ++idlecnt);	1134	ev_start (EV_A_ (W)w, ++idlecnt);
903	array_needsize (idles, idlemax, idlecnt, );	1135	array_needsize (idles, idlemax, idlecnt, );
904	idles [idlecnt - 1] = w;	1136	idles [idlecnt - 1] = w;
905	}	1137	}
906		1138
907	void	1139	void
908	ev_idle_stop (struct ev_idle *w)	1140	ev_idle_stop (EV_P_ struct ev_idle *w)
909	{	1141	{
910	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
911	if (ev_is_active (w))	1143	if (ev_is_active (w))
912	return;	1144	return;
913		1145
914	idles [w->active - 1] = idles [--idlecnt];	1146	idles [w->active - 1] = idles [--idlecnt];
915	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
916	}	1148	}
917		1149
918	void	1150	void
919	ev_prepare_start (struct ev_prepare *w)	1151	ev_prepare_start (EV_P_ struct ev_prepare *w)
920	{	1152	{
921	if (ev_is_active (w))	1153	if (ev_is_active (w))
922	return;	1154	return;
923		1155
924	ev_start ((W)w, ++preparecnt);	1156	ev_start (EV_A_ (W)w, ++preparecnt);
925	array_needsize (prepares, preparemax, preparecnt, );	1157	array_needsize (prepares, preparemax, preparecnt, );
926	prepares [preparecnt - 1] = w;	1158	prepares [preparecnt - 1] = w;
927	}	1159	}
928		1160
929	void	1161	void
930	ev_prepare_stop (struct ev_prepare *w)	1162	ev_prepare_stop (EV_P_ struct ev_prepare *w)
931	{	1163	{
932	ev_clear ((W)w);	1164	ev_clear_pending (EV_A_ (W)w);
933	if (ev_is_active (w))	1165	if (ev_is_active (w))
934	return;	1166	return;
935		1167
936	prepares [w->active - 1] = prepares [--preparecnt];	1168	prepares [w->active - 1] = prepares [--preparecnt];
937	ev_stop ((W)w);	1169	ev_stop (EV_A_ (W)w);
938	}	1170	}
939		1171
940	void	1172	void
941	ev_check_start (struct ev_check *w)	1173	ev_check_start (EV_P_ struct ev_check *w)
942	{	1174	{
943	if (ev_is_active (w))	1175	if (ev_is_active (w))
944	return;	1176	return;
945		1177
946	ev_start ((W)w, ++checkcnt);	1178	ev_start (EV_A_ (W)w, ++checkcnt);
947	array_needsize (checks, checkmax, checkcnt, );	1179	array_needsize (checks, checkmax, checkcnt, );
948	checks [checkcnt - 1] = w;	1180	checks [checkcnt - 1] = w;
949	}	1181	}
950		1182
951	void	1183	void
952	ev_check_stop (struct ev_check *w)	1184	ev_check_stop (EV_P_ struct ev_check *w)
953	{	1185	{
954	ev_clear ((W)w);	1186	ev_clear_pending (EV_A_ (W)w);
955	if (ev_is_active (w))	1187	if (ev_is_active (w))
956	return;	1188	return;
957		1189
958	checks [w->active - 1] = checks [--checkcnt];	1190	checks [w->active - 1] = checks [--checkcnt];
959	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
960	}	1192	}
961		1193
962	void	1194	void
963	ev_child_start (struct ev_child *w)	1195	ev_child_start (EV_P_ struct ev_child *w)
964	{	1196	{
965	if (ev_is_active (w))	1197	if (ev_is_active (w))
966	return;	1198	return;
967		1199
968	ev_start ((W)w, 1);	1200	ev_start (EV_A_ (W)w, 1);
969	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1201	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	}	1202	}
971		1203
972	void	1204	void
973	ev_child_stop (struct ev_child *w)	1205	ev_child_stop (EV_P_ struct ev_child *w)
974	{	1206	{
975	ev_clear ((W)w);	1207	ev_clear_pending (EV_A_ (W)w);
976	if (ev_is_active (w))	1208	if (ev_is_active (w))
977	return;	1209	return;
978		1210
979	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1211	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	ev_stop ((W)w);	1212	ev_stop (EV_A_ (W)w);
981	}	1213	}
982		1214
983	/*****************************************************************************/	1215	/*****************************************************************************/
984		1216
985	struct ev_once	1217	struct ev_once
…		…
989	void (cb)(int revents, void arg);	1221	void (cb)(int revents, void arg);
990	void *arg;	1222	void *arg;
991	};	1223	};
992		1224
993	static void	1225	static void
994	once_cb (struct ev_once *once, int revents)	1226	once_cb (EV_P_ struct ev_once *once, int revents)
995	{	1227	{
996	void (cb)(int revents, void arg) = once->cb;	1228	void (cb)(int revents, void arg) = once->cb;
997	void *arg = once->arg;	1229	void *arg = once->arg;
998		1230
999	ev_io_stop (&once->io);	1231	ev_io_stop (EV_A_ &once->io);
1000	ev_timer_stop (&once->to);	1232	ev_timer_stop (EV_A_ &once->to);
1001	free (once);	1233	free (once);
1002		1234
1003	cb (revents, arg);	1235	cb (revents, arg);
1004	}	1236	}
1005		1237
1006	static void	1238	static void
1007	once_cb_io (struct ev_io *w, int revents)	1239	once_cb_io (EV_P_ struct ev_io *w, int revents)
1008	{	1240	{
1009	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1241	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1010	}	1242	}
1011		1243
1012	static void	1244	static void
1013	once_cb_to (struct ev_timer *w, int revents)	1245	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014	{	1246	{
1015	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1247	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1016	}	1248	}
1017		1249
1018	void	1250	void
1019	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1251	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1020	{	1252	{
1021	struct ev_once *once = malloc (sizeof (struct ev_once));	1253	struct ev_once *once = malloc (sizeof (struct ev_once));
1022		1254
1023	if (!once)	1255	if (!once)
1024	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1256	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1029		1261
1030	ev_watcher_init (&once->io, once_cb_io);	1262	ev_watcher_init (&once->io, once_cb_io);
1031	if (fd >= 0)	1263	if (fd >= 0)
1032	{	1264	{
1033	ev_io_set (&once->io, fd, events);	1265	ev_io_set (&once->io, fd, events);
1034	ev_io_start (&once->io);	1266	ev_io_start (EV_A_ &once->io);
1035	}	1267	}
1036		1268
1037	ev_watcher_init (&once->to, once_cb_to);	1269	ev_watcher_init (&once->to, once_cb_to);
1038	if (timeout >= 0.)	1270	if (timeout >= 0.)
1039	{	1271	{
1040	ev_timer_set (&once->to, timeout, 0.);	1272	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1273	ev_timer_start (EV_A_ &once->to);
1042	}	1274	}
1043	}	1275	}
1044	}	1276	}
1045		1277
1046	/*****************************************************************************/	1278	/*****************************************************************************/

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs. Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC