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

Comparing libev/ev.c (file contents):
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
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	#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
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	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	209	static void
145	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
146	{	211	{
147	while (count--)	212	while (count--)
148	{	213	{
149	base->head = 0;	214	base->head = 0;
150	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
151	++base;	218	++base;
152	}	219	}
153	}	220	}
154		221
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	222	static void
165	event (W w, int events)	223	event (EV_P_ W w, int events)
166	{	224	{
167	if (w->active)	225	if (w->pending)
168	{	226	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
173	}	229	}
174	}
175		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
176	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
177	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
178	{	248	{
179	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	250	struct ev_io *w;
181		251
182	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
183	{	253	{
184	int ev = w->events & events;	254	int ev = w->events & events;
185		255
186	if (ev)	256	if (ev)
187	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
188	}	258	}
189	}	259	}
190		260
		261	/*****************************************************************************/
		262
191	static void	263	static void
192	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
193	{	265	{
194	int i;	266	int i;
195		267
196	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		277	events \|= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify \|\| fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
198	}	314	}
199		315
200	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
201	static void	317	static void
202	fd_recheck (void)	318	fd_ebadf (EV_P)
203	{	319	{
204	int fd;	320	int fd;
205		321
206	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	323	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	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)
210	{	336	{
211	event ((W)anfds [fd].head, EV_ERROR);	337	close (fd);
212	evio_stop (anfds [fd].head);	338	fd_kill (EV_A_ fd);
		339	return;
213	}	340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
214	}	356	}
215		357
216	/*****************************************************************************/	358	/*****************************************************************************/
217		359
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void	360	static void
225	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
226	{	362	{
227	WT w = timers [k];	363	WT w = heap [k];
228		364
229	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
230	{	366	{
231	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
232	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
233	k >>= 1;	369	k >>= 1;
234	}	370	}
235		371
236	timers [k] = w;	372	heap [k] = w;
237	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
238		374
239	}	375	}
240		376
241	static void	377	static void
242	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
243	{	379	{
244	WT w = timers [k];	380	WT w = heap [k];
245		381
246	while (k < (N >> 1))	382	while (k < (N >> 1))
247	{	383	{
248	int j = k << 1;	384	int j = k << 1;
249		385
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
251	++j;	387	++j;
252		388
253	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
254	break;	390	break;
255		391
256	timers [k] = timers [j];	392	heap [k] = heap [j];
257	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
258	k = j;	394	k = j;
259	}	395	}
260		396
261	timers [k] = w;	397	heap [k] = w;
262	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
263	}	399	}
264		400
265	/*****************************************************************************/	401	/*****************************************************************************/
266		402
267	typedef struct	403	typedef struct
268	{	404	{
269	struct ev_signal *head;	405	struct ev_watcher_list *head;
270	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
271	} ANSIG;	407	} ANSIG;
272		408
273	static ANSIG *signals;	409	static ANSIG *signals;
274	static int signalmax;	410	static int signalmax;
275		411
276	static int sigpipe [2];	412	static int sigpipe [2];
277	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;
279		414
280	static void	415	static void
281	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
282	{	417	{
283	while (count--)	418	while (count--)
284	{	419	{
285	base->head = 0;	420	base->head = 0;
286	base->gotsig = 0;	421	base->gotsig = 0;
		422
287	++base;	423	++base;
288	}	424	}
289	}	425	}
290		426
291	static void	427	static void
…		…
293	{	429	{
294	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
295		431
296	if (!gotsig)	432	if (!gotsig)
297	{	433	{
		434	int old_errno = errno;
298	gotsig = 1;	435	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
300	}	438	}
301	}	439	}
302		440
303	static void	441	static void
304	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	443	{
306	struct ev_signal *w;	444	struct ev_watcher_list *w;
307	int sig;	445	int signum;
308		446
		447	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	448	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		449
312	for (sig = signalmax; sig--; )	450	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	451	if (signals [signum].gotsig)
314	{	452	{
315	signals [sig].gotsig = 0;	453	signals [signum].gotsig = 0;
316		454
317	for (w = signals [sig].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
319	}	457	}
320	}	458	}
321		459
322	static void	460	static void
323	siginit (void)	461	siginit (EV_P)
324	{	462	{
		463	#ifndef WIN32
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327		466
328	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
331		471
332	evio_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	475	}
335		476
336	/*****************************************************************************/	477	/*****************************************************************************/
337		478
338	static struct ev_idle **idles;	479	#ifndef WIN32
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348
349	static struct ev_child *childs [PID_HASHSIZE];
350	static struct ev_signal childev;
351		480
352	#ifndef WCONTINUED	481	#ifndef WCONTINUED
353	# define WCONTINUED 0	482	# define WCONTINUED 0
354	#endif	483	#endif
355		484
356	static void	485	static void
357	childcb (struct ev_signal *sw, int revents)	486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	487	{
359	struct ev_child *w;	488	struct ev_child *w;
		489
		490	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		491	if (w->pid == pid \|\| !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it now */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
360	int pid, status;	503	int pid, status;
361		504
362	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	505	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	506	{
364	if (w->pid == pid \|\| w->pid == -1)	507	/* make sure we are called again until all childs have been reaped */
365	{	508	event (EV_A_ (W)sw, EV_SIGNAL);
366	w->status = status;	509
367	event ((W)w, EV_CHILD);	510	child_reap (EV_A_ sw, pid, pid, status);
368	}	511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
369	}	513	}
		514
		515	#endif
370		516
371	/*****************************************************************************/	517	/*****************************************************************************/
372		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
373	#if HAVE_EPOLL	522	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	523	# include "ev_epoll.c"
375	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
376	#if HAVE_SELECT	528	#if EV_USE_SELECT
377	# include "ev_select.c"	529	# include "ev_select.c"
378	#endif	530	#endif
379		531
380	int	532	int
381	ev_version_major (void)	533	ev_version_major (void)
…		…
387	ev_version_minor (void)	539	ev_version_minor (void)
388	{	540	{
389	return EV_VERSION_MINOR;	541	return EV_VERSION_MINOR;
390	}	542	}
391		543
392	int ev_init (int flags)	544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
393	{	547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	\|\| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
394	if (!ev_method)	565	if (!method)
395	{	566	{
396	#if HAVE_MONOTONIC	567	#if EV_USE_MONOTONIC
397	{	568	{
398	struct timespec ts;	569	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	571	have_monotonic = 1;
401	}	572	}
402	#endif	573	#endif
403		574
404	ev_now = ev_time ();	575	rt_now = ev_time ();
405	now = get_clock ();	576	mn_now = get_clock ();
		577	now_floor = mn_now;
406	diff = ev_now - now;	578	rtmn_diff = rt_now - mn_now;
407		579
		580	if (methods == EVMETHOD_AUTO)
		581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
		584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
		590	#if EV_USE_EPOLL
		591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		595	#endif
		596	#if EV_USE_SELECT
		597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		598	#endif
		599	}
		600	}
		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/TODO/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/TODO/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
408	if (pipe (sigpipe))	676	if (pipe (sigpipe))
409	return 0;	677	return 0;
410		678
411	ev_method = EVMETHOD_NONE;	679	if (!default_loop)
412	#if HAVE_EPOLL	680	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
414	#endif	685	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		686
		687	loop_init (EV_A_ methods);
		688
419	if (ev_method)	689	if (ev_method (EV_A))
420	{	690	{
421	evw_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
422	siginit ();	693	siginit (EV_A);
423		694
		695	#ifndef WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	696	ev_signal_init (&childev, childcb, SIGCHLD);
		697	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	698	ev_signal_start (EV_A_ &childev);
		699	ev_unref (EV_A); /* child watcher should not keep loop alive */
		700	#endif
426	}	701	}
		702	else
		703	default_loop = 0;
427	}	704	}
428		705
429	return ev_method;	706	return default_loop;
430	}	707	}
431		708
432	/*****************************************************************************/
433
434	void	709	void
435	ev_prefork (void)	710	ev_default_destroy (void)
436	{	711	{
437	/* nop */	712	#if EV_MULTIPLICITY
438	}	713	struct ev_loop *loop = default_loop;
439
440	void
441	ev_postfork_parent (void)
442	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif	714	#endif
453		715
		716	ev_ref (EV_A); /* child watcher */
		717	ev_signal_stop (EV_A_ &childev);
		718
		719	ev_ref (EV_A); /* signal watcher */
454	evio_stop (&sigev);	720	ev_io_stop (EV_A_ &sigev);
		721
		722	close (sigpipe [0]); sigpipe [0] = 0;
		723	close (sigpipe [1]); sigpipe [1] = 0;
		724
		725	loop_destroy (EV_A);
		726	}
		727
		728	void
		729	ev_default_fork (EV_P)
		730	{
		731	loop_fork (EV_A);
		732
		733	ev_io_stop (EV_A_ &sigev);
455	close (sigpipe [0]);	734	close (sigpipe [0]);
456	close (sigpipe [1]);	735	close (sigpipe [1]);
457	pipe (sigpipe);	736	pipe (sigpipe);
		737
		738	ev_ref (EV_A); /* signal watcher */
458	siginit ();	739	siginit (EV_A);
459	}	740	}
460		741
461	/*****************************************************************************/	742	/*****************************************************************************/
462		743
463	static void	744	static void
464	fd_reify (void)	745	call_pending (EV_P)
465	{	746	{
466	int i;	747	int pri;
467		748
468	for (i = 0; i < fdchangecnt; ++i)	749	for (pri = NUMPRI; pri--; )
469	{	750	while (pendingcnt [pri])
470	int fd = fdchanges [i];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473
474	int wev = 0;
475
476	for (w = anfd->head; w; w = w->next)
477	wev \|= w->events;
478
479	if (anfd->wev != wev)
480	{	751	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;	752	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
495		753
496	if (p->w)	754	if (p->w)
497	{	755	{
498	p->w->pending = 0;	756	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	757	p->w->cb (EV_A_ p->w, p->events);
500	}	758	}
501	}	759	}
502	}	760	}
503		761
504	static void	762	static void
505	timers_reify (void)	763	timers_reify (EV_P)
506	{	764	{
507	while (timercnt && timers [0]->at <= now)	765	while (timercnt && timers [0]->at <= mn_now)
508	{	766	{
509	struct ev_timer *w = timers [0];	767	struct ev_timer *w = timers [0];
510
511	event ((W)w, EV_TIMEOUT);
512		768
513	/* first reschedule or stop timer */	769	/* first reschedule or stop timer */
514	if (w->repeat)	770	if (w->repeat)
515	{	771	{
		772	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
516	w->at = now + w->repeat;	773	w->at = mn_now + w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));
518	downheap ((WT *)timers, timercnt, 0);	774	downheap ((WT *)timers, timercnt, 0);
519	}	775	}
520	else	776	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	777	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		778
		779	event (EV_A_ (W)w, EV_TIMEOUT);
		780	}
		781	}
		782
525	static void	783	static void
526	periodics_reify (void)	784	periodics_reify (EV_P)
527	{	785	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	786	while (periodiccnt && periodics [0]->at <= rt_now)
529	{	787	{
530	struct ev_periodic *w = periodics [0];	788	struct ev_periodic *w = periodics [0];
531		789
532	/* first reschedule or stop timer */	790	/* first reschedule or stop timer */
533	if (w->interval)	791	if (w->interval)
534	{	792	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	793	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	794	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	795	downheap ((WT *)periodics, periodiccnt, 0);
538	}	796	}
539	else	797	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	798	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		799
542	event ((W)w, EV_TIMEOUT);	800	event (EV_A_ (W)w, EV_PERIODIC);
543	}	801	}
544	}	802	}
545		803
546	static void	804	static void
547	periodics_reschedule (ev_tstamp diff)	805	periodics_reschedule (EV_P)
548	{	806	{
549	int i;	807	int i;
550		808
551	/* adjust periodics after time jump */	809	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	810	for (i = 0; i < periodiccnt; ++i)
553	{	811	{
554	struct ev_periodic *w = periodics [i];	812	struct ev_periodic *w = periodics [i];
555		813
556	if (w->interval)	814	if (w->interval)
557	{	815	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	816	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
559		817
560	if (fabs (diff) >= 1e-4)	818	if (fabs (diff) >= 1e-4)
561	{	819	{
562	evperiodic_stop (w);	820	ev_periodic_stop (EV_A_ w);
563	evperiodic_start (w);	821	ev_periodic_start (EV_A_ w);
564		822
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	823	i = 0; /* restart loop, inefficient, but time jumps should be rare */
566	}	824	}
567	}	825	}
568	}	826	}
569	}	827	}
570		828
		829	inline int
		830	time_update_monotonic (EV_P)
		831	{
		832	mn_now = get_clock ();
		833
		834	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		835	{
		836	rt_now = rtmn_diff + mn_now;
		837	return 0;
		838	}
		839	else
		840	{
		841	now_floor = mn_now;
		842	rt_now = ev_time ();
		843	return 1;
		844	}
		845	}
		846
571	static void	847	static void
572	time_update (void)	848	time_update (EV_P)
573	{	849	{
574	int i;	850	int i;
575		851
576	ev_now = ev_time ();	852	#if EV_USE_MONOTONIC
577
578	if (have_monotonic)	853	if (expect_true (have_monotonic))
579	{	854	{
580	ev_tstamp odiff = diff;	855	if (time_update_monotonic (EV_A))
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	856	{
584	now = get_clock ();	857	ev_tstamp odiff = rtmn_diff;
		858
		859	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		860	{
585	diff = ev_now - now;	861	rtmn_diff = rt_now - mn_now;
586		862
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)	863	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
588	return; /* all is well */	864	return; /* all is well */
589		865
590	ev_now = ev_time ();	866	rt_now = ev_time ();
		867	mn_now = get_clock ();
		868	now_floor = mn_now;
		869	}
		870
		871	periodics_reschedule (EV_A);
		872	/* no timer adjustment, as the monotonic clock doesn't jump */
		873	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
591	}	874	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}	875	}
596	else	876	else
		877	#endif
597	{	878	{
598	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	879	rt_now = ev_time ();
		880
		881	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
599	{	882	{
600	periodics_reschedule (ev_now - now);	883	periodics_reschedule (EV_A);
601		884
602	/* adjust timers. this is easy, as the offset is the same for all */	885	/* adjust timers. this is easy, as the offset is the same for all */
603	for (i = 0; i < timercnt; ++i)	886	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	887	timers [i]->at += rt_now - mn_now;
605	}	888	}
606		889
607	now = ev_now;	890	mn_now = rt_now;
608	}	891	}
609	}	892	}
610		893
611	int ev_loop_done;	894	void
		895	ev_ref (EV_P)
		896	{
		897	++activecnt;
		898	}
612		899
		900	void
		901	ev_unref (EV_P)
		902	{
		903	--activecnt;
		904	}
		905
		906	static int loop_done;
		907
		908	void
613	void ev_loop (int flags)	909	ev_loop (EV_P_ int flags)
614	{	910	{
615	double block;	911	double block;
616	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	912	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
617		913
618	do	914	do
619	{	915	{
620	/* queue check watchers (and execute them) */	916	/* queue check watchers (and execute them) */
621	if (preparecnt)	917	if (expect_false (preparecnt))
622	{	918	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	919	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	920	call_pending (EV_A);
625	}	921	}
626		922
627	/* update fd-related kernel structures */	923	/* update fd-related kernel structures */
628	fd_reify ();	924	fd_reify (EV_A);
629		925
630	/* calculate blocking time */	926	/* calculate blocking time */
631		927
632	/* we only need this for !monotonic clockor timers, but as we basically	928	/* we only need this for !monotonic clockor timers, but as we basically
633	always have timers, we just calculate it always */	929	always have timers, we just calculate it always */
		930	#if EV_USE_MONOTONIC
		931	if (expect_true (have_monotonic))
		932	time_update_monotonic (EV_A);
		933	else
		934	#endif
		935	{
634	ev_now = ev_time ();	936	rt_now = ev_time ();
		937	mn_now = rt_now;
		938	}
635		939
636	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	940	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
637	block = 0.;	941	block = 0.;
638	else	942	else
639	{	943	{
640	block = MAX_BLOCKTIME;	944	block = MAX_BLOCKTIME;
641		945
642	if (timercnt)	946	if (timercnt)
643	{	947	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	948	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
645	if (block > to) block = to;	949	if (block > to) block = to;
646	}	950	}
647		951
648	if (periodiccnt)	952	if (periodiccnt)
649	{	953	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	954	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
651	if (block > to) block = to;	955	if (block > to) block = to;
652	}	956	}
653		957
654	if (block < 0.) block = 0.;	958	if (block < 0.) block = 0.;
655	}	959	}
656		960
657	method_poll (block);	961	method_poll (EV_A_ block);
658		962
659	/* update ev_now, do magic */	963	/* update rt_now, do magic */
660	time_update ();	964	time_update (EV_A);
661		965
662	/* queue pending timers and reschedule them */	966	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	967	timers_reify (EV_A); /* relative timers called last */
664	periodics_reify (); /* absolute timers called first */	968	periodics_reify (EV_A); /* absolute timers called first */
665		969
666	/* queue idle watchers unless io or timers are pending */	970	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	971	if (!pendingcnt)
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	972	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		973
670	/* queue check watchers, to be executed first */	974	/* queue check watchers, to be executed first */
671	if (checkcnt)	975	if (checkcnt)
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	976	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		977
674	call_pending ();	978	call_pending (EV_A);
675	}	979	}
676	while (!ev_loop_done);	980	while (activecnt && !loop_done);
677		981
678	if (ev_loop_done != 2)	982	if (loop_done != 2)
679	ev_loop_done = 0;	983	loop_done = 0;
		984	}
		985
		986	void
		987	ev_unloop (EV_P_ int how)
		988	{
		989	loop_done = how;
680	}	990	}
681		991
682	/*****************************************************************************/	992	/*****************************************************************************/
683		993
684	static void	994	inline void
685	wlist_add (WL *head, WL elem)	995	wlist_add (WL *head, WL elem)
686	{	996	{
687	elem->next = *head;	997	elem->next = *head;
688	*head = elem;	998	*head = elem;
689	}	999	}
690		1000
691	static void	1001	inline void
692	wlist_del (WL *head, WL elem)	1002	wlist_del (WL *head, WL elem)
693	{	1003	{
694	while (*head)	1004	while (*head)
695	{	1005	{
696	if (*head == elem)	1006	if (*head == elem)
…		…
701		1011
702	head = &(*head)->next;	1012	head = &(*head)->next;
703	}	1013	}
704	}	1014	}
705		1015
706	static void	1016	inline void
707	ev_clear (W w)	1017	ev_clear_pending (EV_P_ W w)
708	{	1018	{
709	if (w->pending)	1019	if (w->pending)
710	{	1020	{
711	pendings [w->pending - 1].w = 0;	1021	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1022	w->pending = 0;
713	}	1023	}
714	}	1024	}
715		1025
716	static void	1026	inline void
717	ev_start (W w, int active)	1027	ev_start (EV_P_ W w, int active)
718	{	1028	{
		1029	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1030	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1031
719	w->active = active;	1032	w->active = active;
		1033	ev_ref (EV_A);
720	}	1034	}
721		1035
722	static void	1036	inline void
723	ev_stop (W w)	1037	ev_stop (EV_P_ W w)
724	{	1038	{
		1039	ev_unref (EV_A);
725	w->active = 0;	1040	w->active = 0;
726	}	1041	}
727		1042
728	/*****************************************************************************/	1043	/*****************************************************************************/
729		1044
730	void	1045	void
731	evio_start (struct ev_io *w)	1046	ev_io_start (EV_P_ struct ev_io *w)
732	{	1047	{
		1048	int fd = w->fd;
		1049
733	if (ev_is_active (w))	1050	if (ev_is_active (w))
734	return;	1051	return;
735		1052
736	int fd = w->fd;	1053	assert (("ev_io_start called with negative fd", fd >= 0));
737		1054
738	ev_start ((W)w, 1);	1055	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1056	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1057	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1058
742	++fdchangecnt;	1059	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745	}	1060	}
746		1061
747	void	1062	void
748	evio_stop (struct ev_io *w)	1063	ev_io_stop (EV_P_ struct ev_io *w)
749	{	1064	{
750	ev_clear ((W)w);	1065	ev_clear_pending (EV_A_ (W)w);
751	if (!ev_is_active (w))	1066	if (!ev_is_active (w))
752	return;	1067	return;
753		1068
754	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1069	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
755	ev_stop ((W)w);	1070	ev_stop (EV_A_ (W)w);
756		1071
757	++fdchangecnt;	1072	fd_change (EV_A_ w->fd);
758	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
759	fdchanges [fdchangecnt - 1] = w->fd;
760	}	1073	}
761		1074
762	void	1075	void
763	evtimer_start (struct ev_timer *w)	1076	ev_timer_start (EV_P_ struct ev_timer *w)
764	{	1077	{
765	if (ev_is_active (w))	1078	if (ev_is_active (w))
766	return;	1079	return;
767		1080
768	w->at += now;	1081	w->at += mn_now;
769		1082
770	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1083	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
771		1084
772	ev_start ((W)w, ++timercnt);	1085	ev_start (EV_A_ (W)w, ++timercnt);
773	array_needsize (timers, timermax, timercnt, );	1086	array_needsize (timers, timermax, timercnt, );
774	timers [timercnt - 1] = w;	1087	timers [timercnt - 1] = w;
775	upheap ((WT *)timers, timercnt - 1);	1088	upheap ((WT *)timers, timercnt - 1);
776	}	1089	}
777		1090
778	void	1091	void
779	evtimer_stop (struct ev_timer *w)	1092	ev_timer_stop (EV_P_ struct ev_timer *w)
780	{	1093	{
781	ev_clear ((W)w);	1094	ev_clear_pending (EV_A_ (W)w);
782	if (!ev_is_active (w))	1095	if (!ev_is_active (w))
783	return;	1096	return;
784		1097
785	if (w->active < timercnt--)	1098	if (w->active < timercnt--)
786	{	1099	{
…		…
788	downheap ((WT *)timers, timercnt, w->active - 1);	1101	downheap ((WT *)timers, timercnt, w->active - 1);
789	}	1102	}
790		1103
791	w->at = w->repeat;	1104	w->at = w->repeat;
792		1105
793	ev_stop ((W)w);	1106	ev_stop (EV_A_ (W)w);
794	}	1107	}
795		1108
796	void	1109	void
797	evtimer_again (struct ev_timer *w)	1110	ev_timer_again (EV_P_ struct ev_timer *w)
798	{	1111	{
799	if (ev_is_active (w))	1112	if (ev_is_active (w))
800	{	1113	{
801	if (w->repeat)	1114	if (w->repeat)
802	{	1115	{
803	w->at = now + w->repeat;	1116	w->at = mn_now + w->repeat;
804	downheap ((WT *)timers, timercnt, w->active - 1);	1117	downheap ((WT *)timers, timercnt, w->active - 1);
805	}	1118	}
806	else	1119	else
807	evtimer_stop (w);	1120	ev_timer_stop (EV_A_ w);
808	}	1121	}
809	else if (w->repeat)	1122	else if (w->repeat)
810	evtimer_start (w);	1123	ev_timer_start (EV_A_ w);
811	}	1124	}
812		1125
813	void	1126	void
814	evperiodic_start (struct ev_periodic *w)	1127	ev_periodic_start (EV_P_ struct ev_periodic *w)
815	{	1128	{
816	if (ev_is_active (w))	1129	if (ev_is_active (w))
817	return;	1130	return;
818		1131
819	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1132	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
820		1133
821	/* this formula differs from the one in periodic_reify because we do not always round up */	1134	/* this formula differs from the one in periodic_reify because we do not always round up */
822	if (w->interval)	1135	if (w->interval)
823	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1136	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
824		1137
825	ev_start ((W)w, ++periodiccnt);	1138	ev_start (EV_A_ (W)w, ++periodiccnt);
826	array_needsize (periodics, periodicmax, periodiccnt, );	1139	array_needsize (periodics, periodicmax, periodiccnt, );
827	periodics [periodiccnt - 1] = w;	1140	periodics [periodiccnt - 1] = w;
828	upheap ((WT *)periodics, periodiccnt - 1);	1141	upheap ((WT *)periodics, periodiccnt - 1);
829	}	1142	}
830		1143
831	void	1144	void
832	evperiodic_stop (struct ev_periodic *w)	1145	ev_periodic_stop (EV_P_ struct ev_periodic *w)
833	{	1146	{
834	ev_clear ((W)w);	1147	ev_clear_pending (EV_A_ (W)w);
835	if (!ev_is_active (w))	1148	if (!ev_is_active (w))
836	return;	1149	return;
837		1150
838	if (w->active < periodiccnt--)	1151	if (w->active < periodiccnt--)
839	{	1152	{
840	periodics [w->active - 1] = periodics [periodiccnt];	1153	periodics [w->active - 1] = periodics [periodiccnt];
841	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1154	downheap ((WT *)periodics, periodiccnt, w->active - 1);
842	}	1155	}
843		1156
844	ev_stop ((W)w);	1157	ev_stop (EV_A_ (W)w);
845	}	1158	}
846		1159
847	void	1160	void
848	evsignal_start (struct ev_signal *w)	1161	ev_idle_start (EV_P_ struct ev_idle *w)
849	{	1162	{
850	if (ev_is_active (w))	1163	if (ev_is_active (w))
851	return;	1164	return;
852		1165
		1166	ev_start (EV_A_ (W)w, ++idlecnt);
		1167	array_needsize (idles, idlemax, idlecnt, );
		1168	idles [idlecnt - 1] = w;
		1169	}
		1170
		1171	void
		1172	ev_idle_stop (EV_P_ struct ev_idle *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (ev_is_active (w))
		1176	return;
		1177
		1178	idles [w->active - 1] = idles [--idlecnt];
		1179	ev_stop (EV_A_ (W)w);
		1180	}
		1181
		1182	void
		1183	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1184	{
		1185	if (ev_is_active (w))
		1186	return;
		1187
		1188	ev_start (EV_A_ (W)w, ++preparecnt);
		1189	array_needsize (prepares, preparemax, preparecnt, );
		1190	prepares [preparecnt - 1] = w;
		1191	}
		1192
		1193	void
		1194	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1195	{
		1196	ev_clear_pending (EV_A_ (W)w);
		1197	if (ev_is_active (w))
		1198	return;
		1199
		1200	prepares [w->active - 1] = prepares [--preparecnt];
		1201	ev_stop (EV_A_ (W)w);
		1202	}
		1203
		1204	void
		1205	ev_check_start (EV_P_ struct ev_check *w)
		1206	{
		1207	if (ev_is_active (w))
		1208	return;
		1209
		1210	ev_start (EV_A_ (W)w, ++checkcnt);
		1211	array_needsize (checks, checkmax, checkcnt, );
		1212	checks [checkcnt - 1] = w;
		1213	}
		1214
		1215	void
		1216	ev_check_stop (EV_P_ struct ev_check *w)
		1217	{
		1218	ev_clear_pending (EV_A_ (W)w);
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	checks [w->active - 1] = checks [--checkcnt];
		1223	ev_stop (EV_A_ (W)w);
		1224	}
		1225
		1226	#ifndef SA_RESTART
		1227	# define SA_RESTART 0
		1228	#endif
		1229
		1230	void
		1231	ev_signal_start (EV_P_ struct ev_signal *w)
		1232	{
		1233	#if EV_MULTIPLICITY
		1234	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1235	#endif
		1236	if (ev_is_active (w))
		1237	return;
		1238
		1239	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1240
853	ev_start ((W)w, 1);	1241	ev_start (EV_A_ (W)w, 1);
854	array_needsize (signals, signalmax, w->signum, signals_init);	1242	array_needsize (signals, signalmax, w->signum, signals_init);
855	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1243	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
856		1244
857	if (!w->next)	1245	if (!w->next)
858	{	1246	{
859	struct sigaction sa;	1247	struct sigaction sa;
860	sa.sa_handler = sighandler;	1248	sa.sa_handler = sighandler;
861	sigfillset (&sa.sa_mask);	1249	sigfillset (&sa.sa_mask);
862	sa.sa_flags = 0;	1250	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
863	sigaction (w->signum, &sa, 0);	1251	sigaction (w->signum, &sa, 0);
864	}	1252	}
865	}	1253	}
866		1254
867	void	1255	void
868	evsignal_stop (struct ev_signal *w)	1256	ev_signal_stop (EV_P_ struct ev_signal *w)
869	{	1257	{
870	ev_clear ((W)w);	1258	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1259	if (!ev_is_active (w))
872	return;	1260	return;
873		1261
874	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1262	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
875	ev_stop ((W)w);	1263	ev_stop (EV_A_ (W)w);
876		1264
877	if (!signals [w->signum - 1].head)	1265	if (!signals [w->signum - 1].head)
878	signal (w->signum, SIG_DFL);	1266	signal (w->signum, SIG_DFL);
879	}	1267	}
880		1268
881	void evidle_start (struct ev_idle *w)	1269	void
		1270	ev_child_start (EV_P_ struct ev_child *w)
882	{	1271	{
		1272	#if EV_MULTIPLICITY
		1273	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1274	#endif
883	if (ev_is_active (w))	1275	if (ev_is_active (w))
884	return;	1276	return;
885		1277
886	ev_start ((W)w, ++idlecnt);	1278	ev_start (EV_A_ (W)w, 1);
887	array_needsize (idles, idlemax, idlecnt, );	1279	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
888	idles [idlecnt - 1] = w;
889	}	1280	}
890		1281
891	void evidle_stop (struct ev_idle *w)	1282	void
		1283	ev_child_stop (EV_P_ struct ev_child *w)
892	{	1284	{
893	ev_clear ((W)w);	1285	ev_clear_pending (EV_A_ (W)w);
894	if (ev_is_active (w))	1286	if (ev_is_active (w))
895	return;	1287	return;
896		1288
897	idles [w->active - 1] = idles [--idlecnt];
898	ev_stop ((W)w);
899	}
900
901	void evprepare_start (struct ev_prepare *w)
902	{
903	if (ev_is_active (w))
904	return;
905
906	ev_start ((W)w, ++preparecnt);
907	array_needsize (prepares, preparemax, preparecnt, );
908	prepares [preparecnt - 1] = w;
909	}
910
911	void evprepare_stop (struct ev_prepare *w)
912	{
913	ev_clear ((W)w);
914	if (ev_is_active (w))
915	return;
916
917	prepares [w->active - 1] = prepares [--preparecnt];
918	ev_stop ((W)w);
919	}
920
921	void evcheck_start (struct ev_check *w)
922	{
923	if (ev_is_active (w))
924	return;
925
926	ev_start ((W)w, ++checkcnt);
927	array_needsize (checks, checkmax, checkcnt, );
928	checks [checkcnt - 1] = w;
929	}
930
931	void evcheck_stop (struct ev_check *w)
932	{
933	ev_clear ((W)w);
934	if (ev_is_active (w))
935	return;
936
937	checks [w->active - 1] = checks [--checkcnt];
938	ev_stop ((W)w);
939	}
940
941	void evchild_start (struct ev_child *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, 1);
947	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
948	}
949
950	void evchild_stop (struct ev_child *w)
951	{
952	ev_clear ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1289	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
957	ev_stop ((W)w);	1290	ev_stop (EV_A_ (W)w);
958	}	1291	}
959		1292
960	/*****************************************************************************/	1293	/*****************************************************************************/
961		1294
962	struct ev_once	1295	struct ev_once
…		…
966	void (cb)(int revents, void arg);	1299	void (cb)(int revents, void arg);
967	void *arg;	1300	void *arg;
968	};	1301	};
969		1302
970	static void	1303	static void
971	once_cb (struct ev_once *once, int revents)	1304	once_cb (EV_P_ struct ev_once *once, int revents)
972	{	1305	{
973	void (cb)(int revents, void arg) = once->cb;	1306	void (cb)(int revents, void arg) = once->cb;
974	void *arg = once->arg;	1307	void *arg = once->arg;
975		1308
976	evio_stop (&once->io);	1309	ev_io_stop (EV_A_ &once->io);
977	evtimer_stop (&once->to);	1310	ev_timer_stop (EV_A_ &once->to);
978	free (once);	1311	free (once);
979		1312
980	cb (revents, arg);	1313	cb (revents, arg);
981	}	1314	}
982		1315
983	static void	1316	static void
984	once_cb_io (struct ev_io *w, int revents)	1317	once_cb_io (EV_P_ struct ev_io *w, int revents)
985	{	1318	{
986	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1319	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
987	}	1320	}
988		1321
989	static void	1322	static void
990	once_cb_to (struct ev_timer *w, int revents)	1323	once_cb_to (EV_P_ struct ev_timer *w, int revents)
991	{	1324	{
992	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1325	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
993	}	1326	}
994		1327
995	void	1328	void
996	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1329	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
997	{	1330	{
998	struct ev_once *once = malloc (sizeof (struct ev_once));	1331	struct ev_once *once = malloc (sizeof (struct ev_once));
999		1332
1000	if (!once)	1333	if (!once)
1001	cb (EV_ERROR, arg);	1334	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1002	else	1335	else
1003	{	1336	{
1004	once->cb = cb;	1337	once->cb = cb;
1005	once->arg = arg;	1338	once->arg = arg;
1006		1339
1007	evw_init (&once->io, once_cb_io);	1340	ev_watcher_init (&once->io, once_cb_io);
1008
1009	if (fd >= 0)	1341	if (fd >= 0)
1010	{	1342	{
1011	evio_set (&once->io, fd, events);	1343	ev_io_set (&once->io, fd, events);
1012	evio_start (&once->io);	1344	ev_io_start (EV_A_ &once->io);
1013	}	1345	}
1014		1346
1015	evw_init (&once->to, once_cb_to);	1347	ev_watcher_init (&once->to, once_cb_to);
1016
1017	if (timeout >= 0.)	1348	if (timeout >= 0.)
1018	{	1349	{
1019	evtimer_set (&once->to, timeout, 0.);	1350	ev_timer_set (&once->to, timeout, 0.);
1020	evtimer_start (&once->to);	1351	ev_timer_start (EV_A_ &once->to);
1021	}	1352	}
1022	}	1353	}
1023	}	1354	}
1024		1355
1025	/*****************************************************************************/
1026
1027	#if 0
1028
1029	struct ev_io wio;
1030
1031	static void
1032	sin_cb (struct ev_io *w, int revents)
1033	{
1034	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1035	}
1036
1037	static void
1038	ocb (struct ev_timer *w, int revents)
1039	{
1040	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1041	evtimer_stop (w);
1042	evtimer_start (w);
1043	}
1044
1045	static void
1046	scb (struct ev_signal *w, int revents)
1047	{
1048	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1049	evio_stop (&wio);
1050	evio_start (&wio);
1051	}
1052
1053	static void
1054	gcb (struct ev_signal *w, int revents)
1055	{
1056	fprintf (stderr, "generic %x\n", revents);
1057
1058	}
1059
1060	int main (void)
1061	{
1062	ev_init (0);
1063
1064	evio_init (&wio, sin_cb, 0, EV_READ);
1065	evio_start (&wio);
1066
1067	struct ev_timer t[10000];
1068
1069	#if 0
1070	int i;
1071	for (i = 0; i < 10000; ++i)
1072	{
1073	struct ev_timer *w = t + i;
1074	evw_init (w, ocb, i);
1075	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1076	evtimer_start (w);
1077	if (drand48 () < 0.5)
1078	evtimer_stop (w);
1079	}
1080	#endif
1081
1082	struct ev_timer t1;
1083	evtimer_init (&t1, ocb, 5, 10);
1084	evtimer_start (&t1);
1085
1086	struct ev_signal sig;
1087	evsignal_init (&sig, scb, SIGQUIT);
1088	evsignal_start (&sig);
1089
1090	struct ev_check cw;
1091	evcheck_init (&cw, gcb);
1092	evcheck_start (&cw);
1093
1094	struct ev_idle iw;
1095	evidle_init (&iw, gcb);
1096	evidle_start (&iw);
1097
1098	ev_loop (0);
1099
1100	return 0;
1101	}
1102
1103	#endif
1104
1105
1106
1107

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Comparing libev/ev.c (file contents): Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs. Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC