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

Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
41	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
42	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
43	#include <sys/time.h>	50	#include <sys/time.h>
44	#include <time.h>	51	#include <time.h>
45		52
		53	/**/
		54
46	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
47	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
49	# endif	84	#endif
50	#endif
51		85
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
62	#endif	89	#endif
		90
		91	/**/
63		92
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		97
68	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		113
70	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
73		117
74	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77
78	static int have_monotonic; /* runtime */
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		119
84	/*****************************************************************************/	120	/*****************************************************************************/
85		121
86	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	#ifdef 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
87	ev_time (void)	156	ev_time (void)
88	{	157	{
89	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
90	struct timespec ts;	159	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	162	#else
94	struct timeval tv;	163	struct timeval tv;
95	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	166	#endif
98	}	167	}
99		168
100	static ev_tstamp	169	inline ev_tstamp
101	get_clock (void)	170	get_clock (void)
102	{	171	{
103	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
104	if (have_monotonic)	173	if (expect_true (have_monotonic))
105	{	174	{
106	struct timespec ts;	175	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	178	}
110	#endif	179	#endif
111		180
112	return ev_time ();	181	return ev_time ();
113	}	182	}
114		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
115	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
117	{ \	194	{ \
118	int newcnt = cur; \	195	int newcnt = cur; \
119	do \	196	do \
120	{ \	197	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	198	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	199	} \
123	while ((cnt) > newcnt); \	200	while ((cnt) > newcnt); \
124	\	201	\
125	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	204	cur = newcnt; \
128	}	205	}
129		206
130	/*****************************************************************************/	207	/*****************************************************************************/
131		208
132	typedef struct
133	{
134	struct ev_io *head;
135	int events;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static void	209	static void
142	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
143	{	211	{
144	while (count--)	212	while (count--)
145	{	213	{
146	base->head = 0;	214	base->head = 0;
147	base->events = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
148	++base;	218	++base;
149	}	219	}
150	}	220	}
151		221
152	typedef struct
153	{
154	W w;
155	int events;
156	} ANPENDING;
157
158	static ANPENDING *pendings;
159	static int pendingmax, pendingcnt;
160
161	static void	222	static void
162	event (W w, int events)	223	event (EV_P_ W w, int events)
163	{	224	{
164	if (w->active)	225	if (w->pending)
165	{	226	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
170	}	229	}
171	}
172		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
173	static void	237	static void
174	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	239	{
176	int i;	240	int i;
177		241
178	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	243	event (EV_A_ events [i], type);
180	}	244	}
181		245
182	static void	246	static void
183	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
184	{	248	{
185	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	250	struct ev_io *w;
187		251
188	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
189	{	253	{
190	int ev = w->events & events;	254	int ev = w->events & events;
191		255
192	if (ev)	256	if (ev)
193	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
194	}	258	}
195	}	259	}
196		260
197	/*****************************************************************************/	261	/*****************************************************************************/
198		262
199	static int *fdchanges;
200	static int fdchangemax, fdchangecnt;
201
202	static void	263	static void
203	fd_reify (void)	264	fd_reify (EV_P)
204	{	265	{
205	int i;	266	int i;
206		267
207	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
208	{	269	{
…		…
210	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	272	struct ev_io *w;
212		273
213	int events = 0;	274	int events = 0;
214		275
215	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
216	events \|= w->events;	277	events \|= w->events;
217		278
218	anfd->events &= ~EV_REIFY;	279	anfd->reify = 0;
219		280
220	if (anfd->events != events)	281	if (anfd->events != events)
221	{	282	{
222	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
223	anfd->events = events;	284	anfd->events = events;
224	}	285	}
225	}	286	}
226		287
227	fdchangecnt = 0;	288	fdchangecnt = 0;
228	}	289	}
229		290
230	static void	291	static void
231	fd_change (int fd)	292	fd_change (EV_P_ int fd)
232	{	293	{
233	if (anfds [fd].events & EV_REIFY)	294	if (anfds [fd].reify \|\| fdchangecnt < 0)
234	return;	295	return;
235		296
236	anfds [fd].events \|= EV_REIFY;	297	anfds [fd].reify = 1;
237		298
238	++fdchangecnt;	299	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
240	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
241	}	302	}
242		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
243	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
244	static void	317	static void
245	fd_recheck (void)	318	fd_ebadf (EV_P)
246	{	319	{
247	int fd;	320	int fd;
248		321
249	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	323	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
252	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)
253	{	336	{
254	event ((W)anfds [fd].head, EV_ERROR);	337	close (fd);
255	ev_io_stop (anfds [fd].head);	338	fd_kill (EV_A_ fd);
		339	return;
256	}	340	}
257	}	341	}
258		342
259	/*****************************************************************************/	343	/*****************************************************************************/
260		344
261	static struct ev_timer **timers;
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266
267	static void	345	static void
268	upheap (WT *timers, int k)	346	upheap (WT *heap, int k)
269	{	347	{
270	WT w = timers [k];	348	WT w = heap [k];
271		349
272	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
273	{	351	{
274	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
276	k >>= 1;	354	k >>= 1;
277	}	355	}
278		356
279	timers [k] = w;	357	heap [k] = w;
280	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
281		359
282	}	360	}
283		361
284	static void	362	static void
285	downheap (WT *timers, int N, int k)	363	downheap (WT *heap, int N, int k)
286	{	364	{
287	WT w = timers [k];	365	WT w = heap [k];
288		366
289	while (k < (N >> 1))	367	while (k < (N >> 1))
290	{	368	{
291	int j = k << 1;	369	int j = k << 1;
292		370
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	372	++j;
295		373
296	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
297	break;	375	break;
298		376
299	timers [k] = timers [j];	377	heap [k] = heap [j];
300	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
301	k = j;	379	k = j;
302	}	380	}
303		381
304	timers [k] = w;	382	heap [k] = w;
305	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
306	}	384	}
307		385
308	/*****************************************************************************/	386	/*****************************************************************************/
309		387
310	typedef struct	388	typedef struct
311	{	389	{
312	struct ev_signal *head;	390	struct ev_watcher_list *head;
313	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
314	} ANSIG;	392	} ANSIG;
315		393
316	static ANSIG *signals;	394	static ANSIG *signals;
317	static int signalmax;	395	static int signalmax;
318		396
319	static int sigpipe [2];	397	static int sigpipe [2];
320	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;
322		399
323	static void	400	static void
324	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
325	{	402	{
326	while (count--)	403	while (count--)
327	{	404	{
328	base->head = 0;	405	base->head = 0;
329	base->gotsig = 0;	406	base->gotsig = 0;
		407
330	++base;	408	++base;
331	}	409	}
332	}	410	}
333		411
334	static void	412	static void
…		…
336	{	414	{
337	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
338		416
339	if (!gotsig)	417	if (!gotsig)
340	{	418	{
		419	int old_errno = errno;
341	gotsig = 1;	420	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
343	}	423	}
344	}	424	}
345		425
346	static void	426	static void
347	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	428	{
349	struct ev_signal *w;	429	struct ev_watcher_list *w;
350	int sig;	430	int signum;
351		431
		432	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	433	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		434
355	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
357	{	437	{
358	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
359		439
360	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
362	}	442	}
363	}	443	}
364		444
365	static void	445	static void
366	siginit (void)	446	siginit (EV_P)
367	{	447	{
		448	#ifndef WIN32
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370		451
371	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
374		456
375	ev_io_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	ev_io_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	460	}
378		461
379	/*****************************************************************************/	462	/*****************************************************************************/
380		463
381	static struct ev_idle **idles;	464	#ifndef WIN32
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391
392	static struct ev_child *childs [PID_HASHSIZE];
393	static struct ev_signal childev;
394		465
395	#ifndef WCONTINUED	466	#ifndef WCONTINUED
396	# define WCONTINUED 0	467	# define WCONTINUED 0
397	#endif	468	#endif
398		469
399	static void	470	static void
400	childcb (struct ev_signal *sw, int revents)	471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	472	{
402	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	{
403	int pid, status;	488	int pid, status;
404		489
405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	490	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	491	{
407	if (w->pid == pid \|\| w->pid == -1)	492	/* make sure we are called again until all childs have been reaped */
408	{	493	event (EV_A_ (W)sw, EV_SIGNAL);
409	w->status = status;	494
410	event ((W)w, EV_CHILD);	495	child_reap (EV_A_ sw, pid, pid, status);
411	}	496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
412	}	498	}
		499
		500	#endif
413		501
414	/*****************************************************************************/	502	/*****************************************************************************/
415		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
416	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	508	# include "ev_epoll.c"
418	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
419	#if HAVE_SELECT	513	#if EV_USE_SELECT
420	# include "ev_select.c"	514	# include "ev_select.c"
421	#endif	515	#endif
422		516
423	int	517	int
424	ev_version_major (void)	518	ev_version_major (void)
…		…
430	ev_version_minor (void)	524	ev_version_minor (void)
431	{	525	{
432	return EV_VERSION_MINOR;	526	return EV_VERSION_MINOR;
433	}	527	}
434		528
435	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)
436	{	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	static void
		548	loop_init (EV_P_ int methods)
		549	{
437	if (!ev_method)	550	if (!method)
438	{	551	{
439	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
440	{	553	{
441	struct timespec ts;	554	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	556	have_monotonic = 1;
444	}	557	}
445	#endif	558	#endif
446		559
447	ev_now = ev_time ();	560	rt_now = ev_time ();
448	now = get_clock ();	561	mn_now = get_clock ();
		562	now_floor = mn_now;
449	diff = ev_now - now;	563	rtmn_diff = rt_now - mn_now;
450		564
451	if (pipe (sigpipe))	565	if (pipe (sigpipe))
452	return 0;	566	return 0;
453		567
		568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
454	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
455	#if HAVE_EPOLL	578	#if EV_USE_EPOLL
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
457	#endif	580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
458	#if HAVE_SELECT	584	#if EV_USE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
460	#endif	586	#endif
461		587
462	if (ev_method)	588	if (method)
463	{	589	{
464	ev_watcher_init (&sigev, sigcb);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
465	siginit ();	592	siginit (EV_A);
466		593
		594	#ifndef WIN32
467	ev_signal_init (&childev, childcb, SIGCHLD);	595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
468	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
469	}	600	}
470	}	601	}
471		602
472	return ev_method;	603	return method;
473	}	604	}
		605
		606	#ifdef 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	loop_init (EV_A_ methods);
		614
		615	return loop;
		616	}
		617
		618	void
		619	ev_loop_delete (EV_P)
		620	{
		621	/TODO/
		622	free (loop);
		623	}
		624
		625	#else
		626
		627	int
		628	ev_init (int methods)
		629	{
		630	loop_init ();
		631	}
		632
		633	#endif
474		634
475	/*****************************************************************************/	635	/*****************************************************************************/
476		636
477	void	637	void
478	ev_prefork (void)	638	ev_fork_prepare (void)
479	{	639	{
480	/* nop */	640	/* nop */
481	}	641	}
482		642
483	void	643	void
484	ev_postfork_parent (void)	644	ev_fork_parent (void)
485	{	645	{
486	/* nop */	646	/* nop */
487	}	647	}
488		648
489	void	649	void
490	ev_postfork_child (void)	650	ev_fork_child (void)
491	{	651	{
		652	/TODO/
		653	#if !EV_MULTIPLICITY
492	#if HAVE_EPOLL	654	#if EV_USE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)	655	if (method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();	656	epoll_postfork_child (EV_A);
495	#endif	657	#endif
496		658
497	ev_io_stop (&sigev);	659	ev_io_stop (EV_A_ &sigev);
498	close (sigpipe [0]);	660	close (sigpipe [0]);
499	close (sigpipe [1]);	661	close (sigpipe [1]);
500	pipe (sigpipe);	662	pipe (sigpipe);
501	siginit ();	663	siginit (EV_A);
		664	#endif
502	}	665	}
503		666
504	/*****************************************************************************/	667	/*****************************************************************************/
505		668
506	static void	669	static void
507	call_pending (void)	670	call_pending (EV_P)
508	{	671	{
		672	int pri;
		673
		674	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	675	while (pendingcnt [pri])
510	{	676	{
511	ANPENDING *p = pendings + --pendingcnt;	677	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		678
513	if (p->w)	679	if (p->w)
514	{	680	{
515	p->w->pending = 0;	681	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	682	p->w->cb (EV_A_ p->w, p->events);
517	}	683	}
518	}	684	}
519	}	685	}
520		686
521	static void	687	static void
522	timers_reify (void)	688	timers_reify (EV_P)
523	{	689	{
524	while (timercnt && timers [0]->at <= now)	690	while (timercnt && timers [0]->at <= mn_now)
525	{	691	{
526	struct ev_timer *w = timers [0];	692	struct ev_timer *w = timers [0];
527
528	event ((W)w, EV_TIMEOUT);
529		693
530	/* first reschedule or stop timer */	694	/* first reschedule or stop timer */
531	if (w->repeat)	695	if (w->repeat)
532	{	696	{
		697	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	698	w->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	699	downheap ((WT *)timers, timercnt, 0);
536	}	700	}
537	else	701	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	702	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		703
		704	event (EV_A_ (W)w, EV_TIMEOUT);
		705	}
		706	}
		707
542	static void	708	static void
543	periodics_reify (void)	709	periodics_reify (EV_P)
544	{	710	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	711	while (periodiccnt && periodics [0]->at <= rt_now)
546	{	712	{
547	struct ev_periodic *w = periodics [0];	713	struct ev_periodic *w = periodics [0];
548		714
549	/* first reschedule or stop timer */	715	/* first reschedule or stop timer */
550	if (w->interval)	716	if (w->interval)
551	{	717	{
552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	718	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
553	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	719	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
554	downheap ((WT *)periodics, periodiccnt, 0);	720	downheap ((WT *)periodics, periodiccnt, 0);
555	}	721	}
556	else	722	else
557	ev_periodic_stop (w); /* nonrepeating: stop timer */	723	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		724
559	event ((W)w, EV_TIMEOUT);	725	event (EV_A_ (W)w, EV_PERIODIC);
560	}	726	}
561	}	727	}
562		728
563	static void	729	static void
564	periodics_reschedule (ev_tstamp diff)	730	periodics_reschedule (EV_P)
565	{	731	{
566	int i;	732	int i;
567		733
568	/* adjust periodics after time jump */	734	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	735	for (i = 0; i < periodiccnt; ++i)
570	{	736	{
571	struct ev_periodic *w = periodics [i];	737	struct ev_periodic *w = periodics [i];
572		738
573	if (w->interval)	739	if (w->interval)
574	{	740	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	741	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
576		742
577	if (fabs (diff) >= 1e-4)	743	if (fabs (diff) >= 1e-4)
578	{	744	{
579	ev_periodic_stop (w);	745	ev_periodic_stop (EV_A_ w);
580	ev_periodic_start (w);	746	ev_periodic_start (EV_A_ w);
581		747
582	i = 0; /* restart loop, inefficient, but time jumps should be rare */	748	i = 0; /* restart loop, inefficient, but time jumps should be rare */
583	}	749	}
584	}	750	}
585	}	751	}
586	}	752	}
587		753
		754	inline int
		755	time_update_monotonic (EV_P)
		756	{
		757	mn_now = get_clock ();
		758
		759	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		760	{
		761	rt_now = rtmn_diff + mn_now;
		762	return 0;
		763	}
		764	else
		765	{
		766	now_floor = mn_now;
		767	rt_now = ev_time ();
		768	return 1;
		769	}
		770	}
		771
588	static void	772	static void
589	time_update (void)	773	time_update (EV_P)
590	{	774	{
591	int i;	775	int i;
592		776
593	ev_now = ev_time ();	777	#if EV_USE_MONOTONIC
594
595	if (have_monotonic)	778	if (expect_true (have_monotonic))
596	{	779	{
597	ev_tstamp odiff = diff;	780	if (time_update_monotonic (EV_A))
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	781	{
601	now = get_clock ();	782	ev_tstamp odiff = rtmn_diff;
		783
		784	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		785	{
602	diff = ev_now - now;	786	rtmn_diff = rt_now - mn_now;
603		787
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)	788	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
605	return; /* all is well */	789	return; /* all is well */
606		790
607	ev_now = ev_time ();	791	rt_now = ev_time ();
		792	mn_now = get_clock ();
		793	now_floor = mn_now;
		794	}
		795
		796	periodics_reschedule (EV_A);
		797	/* no timer adjustment, as the monotonic clock doesn't jump */
		798	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
608	}	799	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}	800	}
613	else	801	else
		802	#endif
614	{	803	{
615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	804	rt_now = ev_time ();
		805
		806	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
616	{	807	{
617	periodics_reschedule (ev_now - now);	808	periodics_reschedule (EV_A);
618		809
619	/* adjust timers. this is easy, as the offset is the same for all */	810	/* adjust timers. this is easy, as the offset is the same for all */
620	for (i = 0; i < timercnt; ++i)	811	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	812	timers [i]->at += rt_now - mn_now;
622	}	813	}
623		814
624	now = ev_now;	815	mn_now = rt_now;
625	}	816	}
626	}	817	}
627		818
628	int ev_loop_done;	819	void
		820	ev_ref (EV_P)
		821	{
		822	++activecnt;
		823	}
629		824
		825	void
		826	ev_unref (EV_P)
		827	{
		828	--activecnt;
		829	}
		830
		831	static int loop_done;
		832
		833	void
630	void ev_loop (int flags)	834	ev_loop (EV_P_ int flags)
631	{	835	{
632	double block;	836	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	837	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
634		838
635	do	839	do
636	{	840	{
637	/* queue check watchers (and execute them) */	841	/* queue check watchers (and execute them) */
638	if (preparecnt)	842	if (expect_false (preparecnt))
639	{	843	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	844	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	845	call_pending (EV_A);
642	}	846	}
643		847
644	/* update fd-related kernel structures */	848	/* update fd-related kernel structures */
645	fd_reify ();	849	fd_reify (EV_A);
646		850
647	/* calculate blocking time */	851	/* calculate blocking time */
648		852
649	/* we only need this for !monotonic clockor timers, but as we basically	853	/* we only need this for !monotonic clockor timers, but as we basically
650	always have timers, we just calculate it always */	854	always have timers, we just calculate it always */
		855	#if EV_USE_MONOTONIC
		856	if (expect_true (have_monotonic))
		857	time_update_monotonic (EV_A);
		858	else
		859	#endif
		860	{
651	ev_now = ev_time ();	861	rt_now = ev_time ();
		862	mn_now = rt_now;
		863	}
652		864
653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	865	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
654	block = 0.;	866	block = 0.;
655	else	867	else
656	{	868	{
657	block = MAX_BLOCKTIME;	869	block = MAX_BLOCKTIME;
658		870
659	if (timercnt)	871	if (timercnt)
660	{	872	{
661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	873	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
662	if (block > to) block = to;	874	if (block > to) block = to;
663	}	875	}
664		876
665	if (periodiccnt)	877	if (periodiccnt)
666	{	878	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	879	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
668	if (block > to) block = to;	880	if (block > to) block = to;
669	}	881	}
670		882
671	if (block < 0.) block = 0.;	883	if (block < 0.) block = 0.;
672	}	884	}
673		885
674	method_poll (block);	886	method_poll (EV_A_ block);
675		887
676	/* update ev_now, do magic */	888	/* update rt_now, do magic */
677	time_update ();	889	time_update (EV_A);
678		890
679	/* queue pending timers and reschedule them */	891	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	892	timers_reify (EV_A); /* relative timers called last */
681	periodics_reify (); /* absolute timers called first */	893	periodics_reify (EV_A); /* absolute timers called first */
682		894
683	/* queue idle watchers unless io or timers are pending */	895	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	896	if (!pendingcnt)
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	897	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		898
687	/* queue check watchers, to be executed first */	899	/* queue check watchers, to be executed first */
688	if (checkcnt)	900	if (checkcnt)
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	901	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		902
691	call_pending ();	903	call_pending (EV_A);
692	}	904	}
693	while (!ev_loop_done);	905	while (activecnt && !loop_done);
694		906
695	if (ev_loop_done != 2)	907	if (loop_done != 2)
696	ev_loop_done = 0;	908	loop_done = 0;
		909	}
		910
		911	void
		912	ev_unloop (EV_P_ int how)
		913	{
		914	loop_done = how;
697	}	915	}
698		916
699	/*****************************************************************************/	917	/*****************************************************************************/
700		918
701	static void	919	inline void
702	wlist_add (WL *head, WL elem)	920	wlist_add (WL *head, WL elem)
703	{	921	{
704	elem->next = *head;	922	elem->next = *head;
705	*head = elem;	923	*head = elem;
706	}	924	}
707		925
708	static void	926	inline void
709	wlist_del (WL *head, WL elem)	927	wlist_del (WL *head, WL elem)
710	{	928	{
711	while (*head)	929	while (*head)
712	{	930	{
713	if (*head == elem)	931	if (*head == elem)
…		…
718		936
719	head = &(*head)->next;	937	head = &(*head)->next;
720	}	938	}
721	}	939	}
722		940
723	static void	941	inline void
724	ev_clear (W w)	942	ev_clear_pending (EV_P_ W w)
725	{	943	{
726	if (w->pending)	944	if (w->pending)
727	{	945	{
728	pendings [w->pending - 1].w = 0;	946	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	947	w->pending = 0;
730	}	948	}
731	}	949	}
732		950
733	static void	951	inline void
734	ev_start (W w, int active)	952	ev_start (EV_P_ W w, int active)
735	{	953	{
		954	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		955	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		956
736	w->active = active;	957	w->active = active;
		958	ev_ref (EV_A);
737	}	959	}
738		960
739	static void	961	inline void
740	ev_stop (W w)	962	ev_stop (EV_P_ W w)
741	{	963	{
		964	ev_unref (EV_A);
742	w->active = 0;	965	w->active = 0;
743	}	966	}
744		967
745	/*****************************************************************************/	968	/*****************************************************************************/
746		969
747	void	970	void
748	ev_io_start (struct ev_io *w)	971	ev_io_start (EV_P_ struct ev_io *w)
749	{	972	{
		973	int fd = w->fd;
		974
750	if (ev_is_active (w))	975	if (ev_is_active (w))
751	return;	976	return;
752		977
753	int fd = w->fd;	978	assert (("ev_io_start called with negative fd", fd >= 0));
754		979
755	ev_start ((W)w, 1);	980	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	981	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	982	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		983
759	fd_change (fd);	984	fd_change (EV_A_ fd);
760	}	985	}
761		986
762	void	987	void
763	ev_io_stop (struct ev_io *w)	988	ev_io_stop (EV_P_ struct ev_io *w)
764	{	989	{
765	ev_clear ((W)w);	990	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	991	if (!ev_is_active (w))
767	return;	992	return;
768		993
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	994	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	995	ev_stop (EV_A_ (W)w);
771		996
772	fd_change (w->fd);	997	fd_change (EV_A_ w->fd);
773	}	998	}
774		999
775	void	1000	void
776	ev_timer_start (struct ev_timer *w)	1001	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	1002	{
778	if (ev_is_active (w))	1003	if (ev_is_active (w))
779	return;	1004	return;
780		1005
781	w->at += now;	1006	w->at += mn_now;
782		1007
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1008	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		1009
785	ev_start ((W)w, ++timercnt);	1010	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1011	array_needsize (timers, timermax, timercnt, );
787	timers [timercnt - 1] = w;	1012	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1013	upheap ((WT *)timers, timercnt - 1);
789	}	1014	}
790		1015
791	void	1016	void
792	ev_timer_stop (struct ev_timer *w)	1017	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	1018	{
794	ev_clear ((W)w);	1019	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1020	if (!ev_is_active (w))
796	return;	1021	return;
797		1022
798	if (w->active < timercnt--)	1023	if (w->active < timercnt--)
799	{	1024	{
…		…
801	downheap ((WT *)timers, timercnt, w->active - 1);	1026	downheap ((WT *)timers, timercnt, w->active - 1);
802	}	1027	}
803		1028
804	w->at = w->repeat;	1029	w->at = w->repeat;
805		1030
806	ev_stop ((W)w);	1031	ev_stop (EV_A_ (W)w);
807	}	1032	}
808		1033
809	void	1034	void
810	ev_timer_again (struct ev_timer *w)	1035	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	1036	{
812	if (ev_is_active (w))	1037	if (ev_is_active (w))
813	{	1038	{
814	if (w->repeat)	1039	if (w->repeat)
815	{	1040	{
816	w->at = now + w->repeat;	1041	w->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1042	downheap ((WT *)timers, timercnt, w->active - 1);
818	}	1043	}
819	else	1044	else
820	ev_timer_stop (w);	1045	ev_timer_stop (EV_A_ w);
821	}	1046	}
822	else if (w->repeat)	1047	else if (w->repeat)
823	ev_timer_start (w);	1048	ev_timer_start (EV_A_ w);
824	}	1049	}
825		1050
826	void	1051	void
827	ev_periodic_start (struct ev_periodic *w)	1052	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1053	{
829	if (ev_is_active (w))	1054	if (ev_is_active (w))
830	return;	1055	return;
831		1056
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1057	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
833		1058
834	/* this formula differs from the one in periodic_reify because we do not always round up */	1059	/* this formula differs from the one in periodic_reify because we do not always round up */
835	if (w->interval)	1060	if (w->interval)
836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1061	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
837		1062
838	ev_start ((W)w, ++periodiccnt);	1063	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1064	array_needsize (periodics, periodicmax, periodiccnt, );
840	periodics [periodiccnt - 1] = w;	1065	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1066	upheap ((WT *)periodics, periodiccnt - 1);
842	}	1067	}
843		1068
844	void	1069	void
845	ev_periodic_stop (struct ev_periodic *w)	1070	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1071	{
847	ev_clear ((W)w);	1072	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1073	if (!ev_is_active (w))
849	return;	1074	return;
850		1075
851	if (w->active < periodiccnt--)	1076	if (w->active < periodiccnt--)
852	{	1077	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1078	periodics [w->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1079	downheap ((WT *)periodics, periodiccnt, w->active - 1);
855	}	1080	}
856		1081
857	ev_stop ((W)w);	1082	ev_stop (EV_A_ (W)w);
858	}	1083	}
859		1084
		1085	#ifndef SA_RESTART
		1086	# define SA_RESTART 0
		1087	#endif
		1088
860	void	1089	void
861	ev_signal_start (struct ev_signal *w)	1090	ev_signal_start (EV_P_ struct ev_signal *w)
862	{	1091	{
863	if (ev_is_active (w))	1092	if (ev_is_active (w))
864	return;	1093	return;
865		1094
		1095	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1096
866	ev_start ((W)w, 1);	1097	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1098	array_needsize (signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1099	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1100
870	if (!w->next)	1101	if (!w->next)
871	{	1102	{
872	struct sigaction sa;	1103	struct sigaction sa;
873	sa.sa_handler = sighandler;	1104	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1105	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1106	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1107	sigaction (w->signum, &sa, 0);
877	}	1108	}
878	}	1109	}
879		1110
880	void	1111	void
881	ev_signal_stop (struct ev_signal *w)	1112	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1113	{
883	ev_clear ((W)w);	1114	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
885	return;	1116	return;
886		1117
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1118	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1119	ev_stop (EV_A_ (W)w);
889		1120
890	if (!signals [w->signum - 1].head)	1121	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1122	signal (w->signum, SIG_DFL);
892	}	1123	}
893		1124
894	void	1125	void
895	ev_idle_start (struct ev_idle *w)	1126	ev_idle_start (EV_P_ struct ev_idle *w)
896	{	1127	{
897	if (ev_is_active (w))	1128	if (ev_is_active (w))
898	return;	1129	return;
899		1130
900	ev_start ((W)w, ++idlecnt);	1131	ev_start (EV_A_ (W)w, ++idlecnt);
901	array_needsize (idles, idlemax, idlecnt, );	1132	array_needsize (idles, idlemax, idlecnt, );
902	idles [idlecnt - 1] = w;	1133	idles [idlecnt - 1] = w;
903	}	1134	}
904		1135
905	void	1136	void
906	ev_idle_stop (struct ev_idle *w)	1137	ev_idle_stop (EV_P_ struct ev_idle *w)
907	{	1138	{
908	ev_clear ((W)w);	1139	ev_clear_pending (EV_A_ (W)w);
909	if (ev_is_active (w))	1140	if (ev_is_active (w))
910	return;	1141	return;
911		1142
912	idles [w->active - 1] = idles [--idlecnt];	1143	idles [w->active - 1] = idles [--idlecnt];
913	ev_stop ((W)w);	1144	ev_stop (EV_A_ (W)w);
914	}	1145	}
915		1146
916	void	1147	void
917	ev_prepare_start (struct ev_prepare *w)	1148	ev_prepare_start (EV_P_ struct ev_prepare *w)
918	{	1149	{
919	if (ev_is_active (w))	1150	if (ev_is_active (w))
920	return;	1151	return;
921		1152
922	ev_start ((W)w, ++preparecnt);	1153	ev_start (EV_A_ (W)w, ++preparecnt);
923	array_needsize (prepares, preparemax, preparecnt, );	1154	array_needsize (prepares, preparemax, preparecnt, );
924	prepares [preparecnt - 1] = w;	1155	prepares [preparecnt - 1] = w;
925	}	1156	}
926		1157
927	void	1158	void
928	ev_prepare_stop (struct ev_prepare *w)	1159	ev_prepare_stop (EV_P_ struct ev_prepare *w)
929	{	1160	{
930	ev_clear ((W)w);	1161	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1162	if (ev_is_active (w))
932	return;	1163	return;
933		1164
934	prepares [w->active - 1] = prepares [--preparecnt];	1165	prepares [w->active - 1] = prepares [--preparecnt];
935	ev_stop ((W)w);	1166	ev_stop (EV_A_ (W)w);
936	}	1167	}
937		1168
938	void	1169	void
939	ev_check_start (struct ev_check *w)	1170	ev_check_start (EV_P_ struct ev_check *w)
940	{	1171	{
941	if (ev_is_active (w))	1172	if (ev_is_active (w))
942	return;	1173	return;
943		1174
944	ev_start ((W)w, ++checkcnt);	1175	ev_start (EV_A_ (W)w, ++checkcnt);
945	array_needsize (checks, checkmax, checkcnt, );	1176	array_needsize (checks, checkmax, checkcnt, );
946	checks [checkcnt - 1] = w;	1177	checks [checkcnt - 1] = w;
947	}	1178	}
948		1179
949	void	1180	void
950	ev_check_stop (struct ev_check *w)	1181	ev_check_stop (EV_P_ struct ev_check *w)
951	{	1182	{
952	ev_clear ((W)w);	1183	ev_clear_pending (EV_A_ (W)w);
953	if (ev_is_active (w))	1184	if (ev_is_active (w))
954	return;	1185	return;
955		1186
956	checks [w->active - 1] = checks [--checkcnt];	1187	checks [w->active - 1] = checks [--checkcnt];
957	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
958	}	1189	}
959		1190
960	void	1191	void
961	ev_child_start (struct ev_child *w)	1192	ev_child_start (EV_P_ struct ev_child *w)
962	{	1193	{
963	if (ev_is_active (w))	1194	if (ev_is_active (w))
964	return;	1195	return;
965		1196
966	ev_start ((W)w, 1);	1197	ev_start (EV_A_ (W)w, 1);
967	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1198	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
968	}	1199	}
969		1200
970	void	1201	void
971	ev_child_stop (struct ev_child *w)	1202	ev_child_stop (EV_P_ struct ev_child *w)
972	{	1203	{
973	ev_clear ((W)w);	1204	ev_clear_pending (EV_A_ (W)w);
974	if (ev_is_active (w))	1205	if (ev_is_active (w))
975	return;	1206	return;
976		1207
977	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1208	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
978	ev_stop ((W)w);	1209	ev_stop (EV_A_ (W)w);
979	}	1210	}
980		1211
981	/*****************************************************************************/	1212	/*****************************************************************************/
982		1213
983	struct ev_once	1214	struct ev_once
…		…
987	void (cb)(int revents, void arg);	1218	void (cb)(int revents, void arg);
988	void *arg;	1219	void *arg;
989	};	1220	};
990		1221
991	static void	1222	static void
992	once_cb (struct ev_once *once, int revents)	1223	once_cb (EV_P_ struct ev_once *once, int revents)
993	{	1224	{
994	void (cb)(int revents, void arg) = once->cb;	1225	void (cb)(int revents, void arg) = once->cb;
995	void *arg = once->arg;	1226	void *arg = once->arg;
996		1227
997	ev_io_stop (&once->io);	1228	ev_io_stop (EV_A_ &once->io);
998	ev_timer_stop (&once->to);	1229	ev_timer_stop (EV_A_ &once->to);
999	free (once);	1230	free (once);
1000		1231
1001	cb (revents, arg);	1232	cb (revents, arg);
1002	}	1233	}
1003		1234
1004	static void	1235	static void
1005	once_cb_io (struct ev_io *w, int revents)	1236	once_cb_io (EV_P_ struct ev_io *w, int revents)
1006	{	1237	{
1007	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1238	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1008	}	1239	}
1009		1240
1010	static void	1241	static void
1011	once_cb_to (struct ev_timer *w, int revents)	1242	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1012	{	1243	{
1013	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1244	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1014	}	1245	}
1015		1246
1016	void	1247	void
1017	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1248	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1018	{	1249	{
1019	struct ev_once *once = malloc (sizeof (struct ev_once));	1250	struct ev_once *once = malloc (sizeof (struct ev_once));
1020		1251
1021	if (!once)	1252	if (!once)
1022	cb (EV_ERROR, arg);	1253	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1023	else	1254	else
1024	{	1255	{
1025	once->cb = cb;	1256	once->cb = cb;
1026	once->arg = arg;	1257	once->arg = arg;
1027		1258
1028	ev_watcher_init (&once->io, once_cb_io);	1259	ev_watcher_init (&once->io, once_cb_io);
1029
1030	if (fd >= 0)	1260	if (fd >= 0)
1031	{	1261	{
1032	ev_io_set (&once->io, fd, events);	1262	ev_io_set (&once->io, fd, events);
1033	ev_io_start (&once->io);	1263	ev_io_start (EV_A_ &once->io);
1034	}	1264	}
1035		1265
1036	ev_watcher_init (&once->to, once_cb_to);	1266	ev_watcher_init (&once->to, once_cb_to);
1037
1038	if (timeout >= 0.)	1267	if (timeout >= 0.)
1039	{	1268	{
1040	ev_timer_set (&once->to, timeout, 0.);	1269	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1270	ev_timer_start (EV_A_ &once->to);
1042	}	1271	}
1043	}	1272	}
1044	}	1273	}
1045		1274
1046	/*****************************************************************************/	1275	/*****************************************************************************/

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Comparing libev/ev.c (file contents): Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs. Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC