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

Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.60 by root, Sun Nov 4 18:29:44 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
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
		78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_REALTIME
		98	# define EV_USE_REALTIME 1
		99	#endif
		100
		101	/**/
		102
47	# ifdef CLOCK_MONOTONIC	103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	105	# define EV_USE_MONOTONIC 0
49	# endif	106	#endif
50	#endif
51		107
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	108	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
62	#endif	111	#endif
		112
		113	/**/
63		114
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	116	#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 */	117	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		118	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		119
68	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		135
70	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
73		139
74	static ev_tstamp now, diff; /* monotonic clock */	140	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		141
84	/*****************************************************************************/	142	/*****************************************************************************/
85		143
86	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
87	ev_time (void)	178	ev_time (void)
88	{	179	{
89	#if HAVE_REALTIME	180	#if EV_USE_REALTIME
90	struct timespec ts;	181	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	183	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	184	#else
94	struct timeval tv;	185	struct timeval tv;
95	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	188	#endif
98	}	189	}
99		190
100	static ev_tstamp	191	inline ev_tstamp
101	get_clock (void)	192	get_clock (void)
102	{	193	{
103	#if HAVE_MONOTONIC	194	#if EV_USE_MONOTONIC
104	if (have_monotonic)	195	if (expect_true (have_monotonic))
105	{	196	{
106	struct timespec ts;	197	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	200	}
110	#endif	201	#endif
111		202
112	return ev_time ();	203	return ev_time ();
113	}	204	}
114		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
		212	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		213
115	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
117	{ \	216	{ \
118	int newcnt = cur ? cur << 1 : 16; \	217	int newcnt = cur; \
		218	do \
		219	{ \
		220	newcnt = array_roundsize (base, newcnt << 1); \
		221	} \
		222	while ((cnt) > newcnt); \
		223	\
119	base = realloc (base, sizeof (base) (newcnt)); \	224	base = realloc (base, sizeof (base) (newcnt)); \
120	init (base + cur, newcnt - cur); \	225	init (base + cur, newcnt - cur); \
121	cur = newcnt; \	226	cur = newcnt; \
122	}	227	}
123		228
124	/*****************************************************************************/	229	/*****************************************************************************/
125		230
126	typedef struct
127	{
128	struct ev_io *head;
129	unsigned char wev, rev; /* want, received event set */
130	} ANFD;
131
132	static ANFD *anfds;
133	static int anfdmax;
134
135	static int *fdchanges;
136	static int fdchangemax, fdchangecnt;
137
138	static void	231	static void
139	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
140	{	233	{
141	while (count--)	234	while (count--)
142	{	235	{
143	base->head = 0;	236	base->head = 0;
144	base->wev = base->rev = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
145	++base;	240	++base;
146	}	241	}
147	}	242	}
148		243
149	typedef struct
150	{
151	W w;
152	int events;
153	} ANPENDING;
154
155	static ANPENDING *pendings;
156	static int pendingmax, pendingcnt;
157
158	static void	244	static void
159	event (W w, int events)	245	event (EV_P_ W w, int events)
160	{	246	{
161	if (w->active)	247	if (w->pending)
162	{	248	{
163	w->pending = ++pendingcnt;
164	array_needsize (pendings, pendingmax, pendingcnt, );
165	pendings [pendingcnt - 1].w = w;
166	pendings [pendingcnt - 1].events = events;	249	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		250	return;
167	}	251	}
168	}
169		252
		253	w->pending = ++pendingcnt [ABSPRI (w)];
		254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		255	pendings [ABSPRI (w)][w->pending - 1].w = w;
		256	pendings [ABSPRI (w)][w->pending - 1].events = events;
		257	}
		258
170	static void	259	static void
		260	queue_events (EV_P_ W *events, int eventcnt, int type)
		261	{
		262	int i;
		263
		264	for (i = 0; i < eventcnt; ++i)
		265	event (EV_A_ events [i], type);
		266	}
		267
		268	static void
171	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
172	{	270	{
173	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
174	struct ev_io *w;	272	struct ev_io *w;
175		273
176	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
177	{	275	{
178	int ev = w->events & events;	276	int ev = w->events & events;
179		277
180	if (ev)	278	if (ev)
181	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
182	}	280	}
183	}	281	}
184		282
		283	/*****************************************************************************/
		284
185	static void	285	static void
186	queue_events (W *events, int eventcnt, int type)	286	fd_reify (EV_P)
187	{	287	{
188	int i;	288	int i;
189		289
190	for (i = 0; i < eventcnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
191	event (events [i], type);	291	{
		292	int fd = fdchanges [i];
		293	ANFD *anfd = anfds + fd;
		294	struct ev_io *w;
		295
		296	int events = 0;
		297
		298	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		299	events \|= w->events;
		300
		301	anfd->reify = 0;
		302
		303	if (anfd->events != events)
		304	{
		305	method_modify (EV_A_ fd, anfd->events, events);
		306	anfd->events = events;
		307	}
		308	}
		309
		310	fdchangecnt = 0;
		311	}
		312
		313	static void
		314	fd_change (EV_P_ int fd)
		315	{
		316	if (anfds [fd].reify \|\| fdchangecnt < 0)
		317	return;
		318
		319	anfds [fd].reify = 1;
		320
		321	++fdchangecnt;
		322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		323	fdchanges [fdchangecnt - 1] = fd;
		324	}
		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		335	}
192	}	336	}
193		337
194	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
195	static void	339	static void
196	fd_recheck ()	340	fd_ebadf (EV_P)
197	{	341	{
198	int fd;	342	int fd;
199		343
200	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
201	if (anfds [fd].wev)	345	if (anfds [fd].events)
202	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
203	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
204	evio_stop (anfds [fd].head);	348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
		358	{
		359	close (fd);
		360	fd_kill (EV_A_ fd);
		361	return;
		362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
205	}	378	}
206		379
207	/*****************************************************************************/	380	/*****************************************************************************/
208		381
209	static struct ev_timer **timers;
210	static int timermax, timercnt;
211
212	static struct ev_periodic **periodics;
213	static int periodicmax, periodiccnt;
214
215	static void	382	static void
216	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
217	{	384	{
218	WT w = timers [k];	385	WT w = heap [k];
219		386
220	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
221	{	388	{
222	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
223	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
224	k >>= 1;	391	k >>= 1;
225	}	392	}
226		393
227	timers [k] = w;	394	heap [k] = w;
228	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
229		396
230	}	397	}
231		398
232	static void	399	static void
233	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
234	{	401	{
235	WT w = timers [k];	402	WT w = heap [k];
236		403
237	while (k < (N >> 1))	404	while (k < (N >> 1))
238	{	405	{
239	int j = k << 1;	406	int j = k << 1;
240		407
241	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
242	++j;	409	++j;
243		410
244	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
245	break;	412	break;
246		413
247	timers [k] = timers [j];	414	heap [k] = heap [j];
248	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
249	k = j;	416	k = j;
250	}	417	}
251		418
252	timers [k] = w;	419	heap [k] = w;
253	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
254	}	421	}
255		422
256	/*****************************************************************************/	423	/*****************************************************************************/
257		424
258	typedef struct	425	typedef struct
259	{	426	{
260	struct ev_signal *head;	427	struct ev_watcher_list *head;
261	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
262	} ANSIG;	429	} ANSIG;
263		430
264	static ANSIG *signals;	431	static ANSIG *signals;
265	static int signalmax;	432	static int signalmax;
266		433
267	static int sigpipe [2];	434	static int sigpipe [2];
268	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
269	static struct ev_io sigev;	436	static struct ev_io sigev;
270		437
271	static void	438	static void
272	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
273	{	440	{
274	while (count--)	441	while (count--)
275	{	442	{
276	base->head = 0;	443	base->head = 0;
277	base->gotsig = 0;	444	base->gotsig = 0;
		445
278	++base;	446	++base;
279	}	447	}
280	}	448	}
281		449
282	static void	450	static void
…		…
284	{	452	{
285	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
286		454
287	if (!gotsig)	455	if (!gotsig)
288	{	456	{
		457	int old_errno = errno;
289	gotsig = 1;	458	gotsig = 1;
290	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
291	}	461	}
292	}	462	}
293		463
294	static void	464	static void
295	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
296	{	466	{
297	struct ev_signal *w;	467	struct ev_watcher_list *w;
298	int sig;	468	int signum;
299		469
		470	read (sigpipe [0], &revents, 1);
300	gotsig = 0;	471	gotsig = 0;
301	read (sigpipe [0], &revents, 1);
302		472
303	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
304	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
305	{	475	{
306	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
307		477
308	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
309	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
310	}	480	}
311	}	481	}
312		482
313	static void	483	static void
314	siginit (void)	484	siginit (EV_P)
315	{	485	{
		486	#ifndef WIN32
316	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318		489
319	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
320	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
322		494
323	evio_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
324	evio_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
325	}	498	}
326		499
327	/*****************************************************************************/	500	/*****************************************************************************/
328		501
329	static struct ev_idle **idles;	502	#ifndef WIN32
330	static int idlemax, idlecnt;
331
332	static struct ev_prepare **prepares;
333	static int preparemax, preparecnt;
334
335	static struct ev_check **checks;
336	static int checkmax, checkcnt;
337
338	/*****************************************************************************/
339		503
340	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
341	static struct ev_signal childev;	505	static struct ev_signal childev;
342		506
343	#ifndef WCONTINUED	507	#ifndef WCONTINUED
344	# define WCONTINUED 0	508	# define WCONTINUED 0
345	#endif	509	#endif
346		510
347	static void	511	static void
348	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
349	{	513	{
350	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		517	if (w->pid == pid \|\| !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it now */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
351	int pid, status;	529	int pid, status;
352		530
353	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
354	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
355	if (w->pid == pid \|\| w->pid == -1)	533	/* make sure we are called again until all childs have been reaped */
		534	event (EV_A_ (W)sw, EV_SIGNAL);
		535
		536	child_reap (EV_A_ sw, pid, pid, status);
		537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
		539	}
		540
		541	#endif
		542
		543	/*****************************************************************************/
		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
		548	#if EV_USE_EPOLL
		549	# include "ev_epoll.c"
		550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
		554	#if EV_USE_SELECT
		555	# include "ev_select.c"
		556	#endif
		557
		558	int
		559	ev_version_major (void)
		560	{
		561	return EV_VERSION_MAJOR;
		562	}
		563
		564	int
		565	ev_version_minor (void)
		566	{
		567	return EV_VERSION_MINOR;
		568	}
		569
		570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
		573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	\|\| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
		591	if (!method)
		592	{
		593	#if EV_USE_MONOTONIC
		594	{
		595	struct timespec ts;
		596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		597	have_monotonic = 1;
		598	}
		599	#endif
		600
		601	rt_now = ev_time ();
		602	mn_now = get_clock ();
		603	now_floor = mn_now;
		604	rtmn_diff = rt_now - mn_now;
		605
		606	if (methods == EVMETHOD_AUTO)
		607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
		610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
		616	#if EV_USE_EPOLL
		617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		621	#endif
		622	#if EV_USE_SELECT
		623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		624	#endif
		625	}
		626	}
		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/TODO/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/TODO/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
		702	if (pipe (sigpipe))
		703	return 0;
		704
		705	if (!default_loop)
		706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
		715	if (ev_method (EV_A))
356	{	716	{
357	w->status = status;	717	ev_watcher_init (&sigev, sigcb);
358	event ((W)w, EV_CHILD);	718	ev_set_priority (&sigev, EV_MAXPRI);
		719	siginit (EV_A);
		720
		721	#ifndef WIN32
		722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
		724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
359	}	727	}
360	}	728	else
361		729	default_loop = 0;
362	/*****************************************************************************/
363
364	#if HAVE_EPOLL
365	# include "ev_epoll.c"
366	#endif
367	#if HAVE_SELECT
368	# include "ev_select.c"
369	#endif
370
371	int ev_init (int flags)
372	{
373	#if HAVE_MONOTONIC
374	{
375	struct timespec ts;
376	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
377	have_monotonic = 1;
378	}
379	#endif
380
381	ev_now = ev_time ();
382	now = get_clock ();
383	diff = ev_now - now;
384
385	if (pipe (sigpipe))
386	return 0;
387
388	ev_method = EVMETHOD_NONE;
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391	#endif
392	#if HAVE_SELECT
393	if (ev_method == EVMETHOD_NONE) select_init (flags);
394	#endif
395
396	if (ev_method)
397	{	730	}
398	evw_init (&sigev, sigcb);
399	siginit ();
400		731
401	evsignal_init (&childev, childcb, SIGCHLD);	732	return default_loop;
		733	}
		734
		735	void
		736	ev_default_destroy (void)
		737	{
		738	#if EV_MULTIPLICITY
		739	struct ev_loop *loop = default_loop;
		740	#endif
		741
		742	ev_ref (EV_A); /* child watcher */
402	evsignal_start (&childev);	743	ev_signal_stop (EV_A_ &childev);
403	}
404		744
405	return ev_method;	745	ev_ref (EV_A); /* signal watcher */
406	}
407
408	/*****************************************************************************/
409
410	void ev_prefork (void)
411	{
412	/* nop */
413	}
414
415	void ev_postfork_parent (void)
416	{
417	/* nop */
418	}
419
420	void ev_postfork_child (void)
421	{
422	#if HAVE_EPOLL
423	if (ev_method == EVMETHOD_EPOLL)
424	epoll_postfork_child ();
425	#endif
426
427	evio_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
428	close (sigpipe [0]);	764	close (sigpipe [0]);
429	close (sigpipe [1]);	765	close (sigpipe [1]);
430	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
431	siginit ();	769	siginit (EV_A);
432	}	770	}
433		771
434	/*****************************************************************************/	772	/*****************************************************************************/
435		773
436	static void	774	static void
437	fd_reify (void)	775	call_pending (EV_P)
438	{	776	{
439	int i;	777	int pri;
440		778
441	for (i = 0; i < fdchangecnt; ++i)	779	for (pri = NUMPRI; pri--; )
442	{	780	while (pendingcnt [pri])
443	int fd = fdchanges [i];
444	ANFD *anfd = anfds + fd;
445	struct ev_io *w;
446
447	int wev = 0;
448
449	for (w = anfd->head; w; w = w->next)
450	wev \|= w->events;
451
452	if (anfd->wev != wev)
453	{	781	{
454	method_modify (fd, anfd->wev, wev);
455	anfd->wev = wev;
456	}
457	}
458
459	fdchangecnt = 0;
460	}
461
462	static void
463	call_pending ()
464	{
465	while (pendingcnt)
466	{
467	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
468		783
469	if (p->w)	784	if (p->w)
470	{	785	{
471	p->w->pending = 0;	786	p->w->pending = 0;
472	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
473	}	788	}
474	}	789	}
475	}	790	}
476		791
477	static void	792	static void
478	timers_reify ()	793	timers_reify (EV_P)
479	{	794	{
480	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
481	{	796	{
482	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
483
484	event ((W)w, EV_TIMEOUT);
485		798
486	/* first reschedule or stop timer */	799	/* first reschedule or stop timer */
487	if (w->repeat)	800	if (w->repeat)
488	{	801	{
		802	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
489	w->at = now + w->repeat;	803	w->at = mn_now + w->repeat;
490	assert (("timer timeout in the past, negative repeat?", w->at > now));
491	downheap ((WT *)timers, timercnt, 0);	804	downheap ((WT *)timers, timercnt, 0);
492	}	805	}
493	else	806	else
494	evtimer_stop (w); /* nonrepeating: stop timer */	807	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495	}
496	}
497		808
		809	event (EV_A_ (W)w, EV_TIMEOUT);
		810	}
		811	}
		812
498	static void	813	static void
499	periodics_reify ()	814	periodics_reify (EV_P)
500	{	815	{
501	while (periodiccnt && periodics [0]->at <= ev_now)	816	while (periodiccnt && periodics [0]->at <= rt_now)
502	{	817	{
503	struct ev_periodic *w = periodics [0];	818	struct ev_periodic *w = periodics [0];
504		819
505	/* first reschedule or stop timer */	820	/* first reschedule or stop timer */
506	if (w->interval)	821	if (w->interval)
507	{	822	{
508	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	823	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
509	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	824	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
510	downheap ((WT *)periodics, periodiccnt, 0);	825	downheap ((WT *)periodics, periodiccnt, 0);
511	}	826	}
512	else	827	else
513	evperiodic_stop (w); /* nonrepeating: stop timer */	828	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514		829
515	event ((W)w, EV_TIMEOUT);	830	event (EV_A_ (W)w, EV_PERIODIC);
516	}	831	}
517	}	832	}
518		833
519	static void	834	static void
520	periodics_reschedule (ev_tstamp diff)	835	periodics_reschedule (EV_P)
521	{	836	{
522	int i;	837	int i;
523		838
524	/* adjust periodics after time jump */	839	/* adjust periodics after time jump */
525	for (i = 0; i < periodiccnt; ++i)	840	for (i = 0; i < periodiccnt; ++i)
526	{	841	{
527	struct ev_periodic *w = periodics [i];	842	struct ev_periodic *w = periodics [i];
528		843
529	if (w->interval)	844	if (w->interval)
530	{	845	{
531	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	846	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
532		847
533	if (fabs (diff) >= 1e-4)	848	if (fabs (diff) >= 1e-4)
534	{	849	{
535	evperiodic_stop (w);	850	ev_periodic_stop (EV_A_ w);
536	evperiodic_start (w);	851	ev_periodic_start (EV_A_ w);
537		852
538	i = 0; /* restart loop, inefficient, but time jumps should be rare */	853	i = 0; /* restart loop, inefficient, but time jumps should be rare */
539	}	854	}
540	}	855	}
541	}	856	}
542	}	857	}
543		858
		859	inline int
		860	time_update_monotonic (EV_P)
		861	{
		862	mn_now = get_clock ();
		863
		864	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		865	{
		866	rt_now = rtmn_diff + mn_now;
		867	return 0;
		868	}
		869	else
		870	{
		871	now_floor = mn_now;
		872	rt_now = ev_time ();
		873	return 1;
		874	}
		875	}
		876
544	static void	877	static void
545	time_update ()	878	time_update (EV_P)
546	{	879	{
547	int i;	880	int i;
548		881
549	ev_now = ev_time ();	882	#if EV_USE_MONOTONIC
550
551	if (have_monotonic)	883	if (expect_true (have_monotonic))
552	{	884	{
553	ev_tstamp odiff = diff;	885	if (time_update_monotonic (EV_A))
554
555	for (i = 4; --i; ) /* loop a few times, before making important decisions */
556	{	886	{
557	now = get_clock ();	887	ev_tstamp odiff = rtmn_diff;
		888
		889	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		890	{
558	diff = ev_now - now;	891	rtmn_diff = rt_now - mn_now;
559		892
560	if (fabs (odiff - diff) < MIN_TIMEJUMP)	893	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
561	return; /* all is well */	894	return; /* all is well */
562		895
563	ev_now = ev_time ();	896	rt_now = ev_time ();
		897	mn_now = get_clock ();
		898	now_floor = mn_now;
		899	}
		900
		901	periodics_reschedule (EV_A);
		902	/* no timer adjustment, as the monotonic clock doesn't jump */
		903	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
564	}	904	}
565
566	periodics_reschedule (diff - odiff);
567	/* no timer adjustment, as the monotonic clock doesn't jump */
568	}	905	}
569	else	906	else
		907	#endif
570	{	908	{
571	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	909	rt_now = ev_time ();
		910
		911	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
572	{	912	{
573	periodics_reschedule (ev_now - now);	913	periodics_reschedule (EV_A);
574		914
575	/* adjust timers. this is easy, as the offset is the same for all */	915	/* adjust timers. this is easy, as the offset is the same for all */
576	for (i = 0; i < timercnt; ++i)	916	for (i = 0; i < timercnt; ++i)
577	timers [i]->at += diff;	917	timers [i]->at += rt_now - mn_now;
578	}	918	}
579		919
580	now = ev_now;	920	mn_now = rt_now;
581	}	921	}
582	}	922	}
583		923
584	int ev_loop_done;	924	void
		925	ev_ref (EV_P)
		926	{
		927	++activecnt;
		928	}
585		929
		930	void
		931	ev_unref (EV_P)
		932	{
		933	--activecnt;
		934	}
		935
		936	static int loop_done;
		937
		938	void
586	void ev_loop (int flags)	939	ev_loop (EV_P_ int flags)
587	{	940	{
588	double block;	941	double block;
589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	942	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
590		943
591	do	944	do
592	{	945	{
593	/* queue check watchers (and execute them) */	946	/* queue check watchers (and execute them) */
594	if (preparecnt)	947	if (expect_false (preparecnt))
595	{	948	{
596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	949	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
597	call_pending ();	950	call_pending (EV_A);
598	}	951	}
599		952
600	/* update fd-related kernel structures */	953	/* update fd-related kernel structures */
601	fd_reify ();	954	fd_reify (EV_A);
602		955
603	/* calculate blocking time */	956	/* calculate blocking time */
604		957
605	/* we only need this for !monotonic clockor timers, but as we basically	958	/* we only need this for !monotonic clockor timers, but as we basically
606	always have timers, we just calculate it always */	959	always have timers, we just calculate it always */
		960	#if EV_USE_MONOTONIC
		961	if (expect_true (have_monotonic))
		962	time_update_monotonic (EV_A);
		963	else
		964	#endif
		965	{
607	ev_now = ev_time ();	966	rt_now = ev_time ();
		967	mn_now = rt_now;
		968	}
608		969
609	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	970	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
610	block = 0.;	971	block = 0.;
611	else	972	else
612	{	973	{
613	block = MAX_BLOCKTIME;	974	block = MAX_BLOCKTIME;
614		975
615	if (timercnt)	976	if (timercnt)
616	{	977	{
617	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	978	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
618	if (block > to) block = to;	979	if (block > to) block = to;
619	}	980	}
620		981
621	if (periodiccnt)	982	if (periodiccnt)
622	{	983	{
623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	984	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
624	if (block > to) block = to;	985	if (block > to) block = to;
625	}	986	}
626		987
627	if (block < 0.) block = 0.;	988	if (block < 0.) block = 0.;
628	}	989	}
629		990
630	method_poll (block);	991	method_poll (EV_A_ block);
631		992
632	/* update ev_now, do magic */	993	/* update rt_now, do magic */
633	time_update ();	994	time_update (EV_A);
634		995
635	/* queue pending timers and reschedule them */	996	/* queue pending timers and reschedule them */
636	timers_reify (); /* relative timers called last */	997	timers_reify (EV_A); /* relative timers called last */
637	periodics_reify (); /* absolute timers called first */	998	periodics_reify (EV_A); /* absolute timers called first */
638		999
639	/* queue idle watchers unless io or timers are pending */	1000	/* queue idle watchers unless io or timers are pending */
640	if (!pendingcnt)	1001	if (!pendingcnt)
641	queue_events ((W *)idles, idlecnt, EV_IDLE);	1002	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
642		1003
643	/* queue check watchers, to be executed first */	1004	/* queue check watchers, to be executed first */
644	if (checkcnt)	1005	if (checkcnt)
645	queue_events ((W *)checks, checkcnt, EV_CHECK);	1006	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646		1007
647	call_pending ();	1008	call_pending (EV_A);
648	}	1009	}
649	while (!ev_loop_done);	1010	while (activecnt && !loop_done);
650		1011
651	if (ev_loop_done != 2)	1012	if (loop_done != 2)
652	ev_loop_done = 0;	1013	loop_done = 0;
		1014	}
		1015
		1016	void
		1017	ev_unloop (EV_P_ int how)
		1018	{
		1019	loop_done = how;
653	}	1020	}
654		1021
655	/*****************************************************************************/	1022	/*****************************************************************************/
656		1023
657	static void	1024	inline void
658	wlist_add (WL *head, WL elem)	1025	wlist_add (WL *head, WL elem)
659	{	1026	{
660	elem->next = *head;	1027	elem->next = *head;
661	*head = elem;	1028	*head = elem;
662	}	1029	}
663		1030
664	static void	1031	inline void
665	wlist_del (WL *head, WL elem)	1032	wlist_del (WL *head, WL elem)
666	{	1033	{
667	while (*head)	1034	while (*head)
668	{	1035	{
669	if (*head == elem)	1036	if (*head == elem)
…		…
674		1041
675	head = &(*head)->next;	1042	head = &(*head)->next;
676	}	1043	}
677	}	1044	}
678		1045
679	static void	1046	inline void
680	ev_clear (W w)	1047	ev_clear_pending (EV_P_ W w)
681	{	1048	{
682	if (w->pending)	1049	if (w->pending)
683	{	1050	{
684	pendings [w->pending - 1].w = 0;	1051	pendings [ABSPRI (w)][w->pending - 1].w = 0;
685	w->pending = 0;	1052	w->pending = 0;
686	}	1053	}
687	}	1054	}
688		1055
689	static void	1056	inline void
690	ev_start (W w, int active)	1057	ev_start (EV_P_ W w, int active)
691	{	1058	{
		1059	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1060	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1061
692	w->active = active;	1062	w->active = active;
		1063	ev_ref (EV_A);
693	}	1064	}
694		1065
695	static void	1066	inline void
696	ev_stop (W w)	1067	ev_stop (EV_P_ W w)
697	{	1068	{
		1069	ev_unref (EV_A);
698	w->active = 0;	1070	w->active = 0;
699	}	1071	}
700		1072
701	/*****************************************************************************/	1073	/*****************************************************************************/
702		1074
703	void	1075	void
704	evio_start (struct ev_io *w)	1076	ev_io_start (EV_P_ struct ev_io *w)
705	{	1077	{
		1078	int fd = w->fd;
		1079
706	if (ev_is_active (w))	1080	if (ev_is_active (w))
707	return;	1081	return;
708		1082
709	int fd = w->fd;	1083	assert (("ev_io_start called with negative fd", fd >= 0));
710		1084
711	ev_start ((W)w, 1);	1085	ev_start (EV_A_ (W)w, 1);
712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1086	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
713	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1087	wlist_add ((WL *)&anfds[fd].head, (WL)w);
714		1088
715	++fdchangecnt;	1089	fd_change (EV_A_ fd);
716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717	fdchanges [fdchangecnt - 1] = fd;
718	}	1090	}
719		1091
720	void	1092	void
721	evio_stop (struct ev_io *w)	1093	ev_io_stop (EV_P_ struct ev_io *w)
722	{	1094	{
723	ev_clear ((W)w);	1095	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1096	if (!ev_is_active (w))
725	return;	1097	return;
726		1098
727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1099	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728	ev_stop ((W)w);	1100	ev_stop (EV_A_ (W)w);
729		1101
730	++fdchangecnt;	1102	fd_change (EV_A_ w->fd);
731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732	fdchanges [fdchangecnt - 1] = w->fd;
733	}	1103	}
734		1104
735	void	1105	void
736	evtimer_start (struct ev_timer *w)	1106	ev_timer_start (EV_P_ struct ev_timer *w)
737	{	1107	{
738	if (ev_is_active (w))	1108	if (ev_is_active (w))
739	return;	1109	return;
740		1110
741	w->at += now;	1111	w->at += mn_now;
742		1112
743	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1113	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
744		1114
745	ev_start ((W)w, ++timercnt);	1115	ev_start (EV_A_ (W)w, ++timercnt);
746	array_needsize (timers, timermax, timercnt, );	1116	array_needsize (timers, timermax, timercnt, );
747	timers [timercnt - 1] = w;	1117	timers [timercnt - 1] = w;
748	upheap ((WT *)timers, timercnt - 1);	1118	upheap ((WT *)timers, timercnt - 1);
749	}	1119	}
750		1120
751	void	1121	void
752	evtimer_stop (struct ev_timer *w)	1122	ev_timer_stop (EV_P_ struct ev_timer *w)
753	{	1123	{
754	ev_clear ((W)w);	1124	ev_clear_pending (EV_A_ (W)w);
755	if (!ev_is_active (w))	1125	if (!ev_is_active (w))
756	return;	1126	return;
757		1127
758	if (w->active < timercnt--)	1128	if (w->active < timercnt--)
759	{	1129	{
…		…
761	downheap ((WT *)timers, timercnt, w->active - 1);	1131	downheap ((WT *)timers, timercnt, w->active - 1);
762	}	1132	}
763		1133
764	w->at = w->repeat;	1134	w->at = w->repeat;
765		1135
766	ev_stop ((W)w);	1136	ev_stop (EV_A_ (W)w);
767	}	1137	}
768		1138
769	void	1139	void
770	evtimer_again (struct ev_timer *w)	1140	ev_timer_again (EV_P_ struct ev_timer *w)
771	{	1141	{
772	if (ev_is_active (w))	1142	if (ev_is_active (w))
773	{	1143	{
774	if (w->repeat)	1144	if (w->repeat)
775	{	1145	{
776	w->at = now + w->repeat;	1146	w->at = mn_now + w->repeat;
777	downheap ((WT *)timers, timercnt, w->active - 1);	1147	downheap ((WT *)timers, timercnt, w->active - 1);
778	}	1148	}
779	else	1149	else
780	evtimer_stop (w);	1150	ev_timer_stop (EV_A_ w);
781	}	1151	}
782	else if (w->repeat)	1152	else if (w->repeat)
783	evtimer_start (w);	1153	ev_timer_start (EV_A_ w);
784	}	1154	}
785		1155
786	void	1156	void
787	evperiodic_start (struct ev_periodic *w)	1157	ev_periodic_start (EV_P_ struct ev_periodic *w)
788	{	1158	{
789	if (ev_is_active (w))	1159	if (ev_is_active (w))
790	return;	1160	return;
791		1161
792	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1162	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
793		1163
794	/* this formula differs from the one in periodic_reify because we do not always round up */	1164	/* this formula differs from the one in periodic_reify because we do not always round up */
795	if (w->interval)	1165	if (w->interval)
796	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1166	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
797		1167
798	ev_start ((W)w, ++periodiccnt);	1168	ev_start (EV_A_ (W)w, ++periodiccnt);
799	array_needsize (periodics, periodicmax, periodiccnt, );	1169	array_needsize (periodics, periodicmax, periodiccnt, );
800	periodics [periodiccnt - 1] = w;	1170	periodics [periodiccnt - 1] = w;
801	upheap ((WT *)periodics, periodiccnt - 1);	1171	upheap ((WT *)periodics, periodiccnt - 1);
802	}	1172	}
803		1173
804	void	1174	void
805	evperiodic_stop (struct ev_periodic *w)	1175	ev_periodic_stop (EV_P_ struct ev_periodic *w)
806	{	1176	{
807	ev_clear ((W)w);	1177	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1178	if (!ev_is_active (w))
809	return;	1179	return;
810		1180
811	if (w->active < periodiccnt--)	1181	if (w->active < periodiccnt--)
812	{	1182	{
813	periodics [w->active - 1] = periodics [periodiccnt];	1183	periodics [w->active - 1] = periodics [periodiccnt];
814	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1184	downheap ((WT *)periodics, periodiccnt, w->active - 1);
815	}	1185	}
816		1186
817	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
818	}	1188	}
819		1189
820	void	1190	void
821	evsignal_start (struct ev_signal *w)	1191	ev_idle_start (EV_P_ struct ev_idle *w)
822	{	1192	{
823	if (ev_is_active (w))	1193	if (ev_is_active (w))
824	return;	1194	return;
825		1195
		1196	ev_start (EV_A_ (W)w, ++idlecnt);
		1197	array_needsize (idles, idlemax, idlecnt, );
		1198	idles [idlecnt - 1] = w;
		1199	}
		1200
		1201	void
		1202	ev_idle_stop (EV_P_ struct ev_idle *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	idles [w->active - 1] = idles [--idlecnt];
		1209	ev_stop (EV_A_ (W)w);
		1210	}
		1211
		1212	void
		1213	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1214	{
		1215	if (ev_is_active (w))
		1216	return;
		1217
		1218	ev_start (EV_A_ (W)w, ++preparecnt);
		1219	array_needsize (prepares, preparemax, preparecnt, );
		1220	prepares [preparecnt - 1] = w;
		1221	}
		1222
		1223	void
		1224	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1225	{
		1226	ev_clear_pending (EV_A_ (W)w);
		1227	if (ev_is_active (w))
		1228	return;
		1229
		1230	prepares [w->active - 1] = prepares [--preparecnt];
		1231	ev_stop (EV_A_ (W)w);
		1232	}
		1233
		1234	void
		1235	ev_check_start (EV_P_ struct ev_check *w)
		1236	{
		1237	if (ev_is_active (w))
		1238	return;
		1239
		1240	ev_start (EV_A_ (W)w, ++checkcnt);
		1241	array_needsize (checks, checkmax, checkcnt, );
		1242	checks [checkcnt - 1] = w;
		1243	}
		1244
		1245	void
		1246	ev_check_stop (EV_P_ struct ev_check *w)
		1247	{
		1248	ev_clear_pending (EV_A_ (W)w);
		1249	if (ev_is_active (w))
		1250	return;
		1251
		1252	checks [w->active - 1] = checks [--checkcnt];
		1253	ev_stop (EV_A_ (W)w);
		1254	}
		1255
		1256	#ifndef SA_RESTART
		1257	# define SA_RESTART 0
		1258	#endif
		1259
		1260	void
		1261	ev_signal_start (EV_P_ struct ev_signal *w)
		1262	{
		1263	#if EV_MULTIPLICITY
		1264	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1265	#endif
		1266	if (ev_is_active (w))
		1267	return;
		1268
		1269	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1270
826	ev_start ((W)w, 1);	1271	ev_start (EV_A_ (W)w, 1);
827	array_needsize (signals, signalmax, w->signum, signals_init);	1272	array_needsize (signals, signalmax, w->signum, signals_init);
828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1273	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829		1274
830	if (!w->next)	1275	if (!w->next)
831	{	1276	{
832	struct sigaction sa;	1277	struct sigaction sa;
833	sa.sa_handler = sighandler;	1278	sa.sa_handler = sighandler;
834	sigfillset (&sa.sa_mask);	1279	sigfillset (&sa.sa_mask);
835	sa.sa_flags = 0;	1280	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836	sigaction (w->signum, &sa, 0);	1281	sigaction (w->signum, &sa, 0);
837	}	1282	}
838	}	1283	}
839		1284
840	void	1285	void
841	evsignal_stop (struct ev_signal *w)	1286	ev_signal_stop (EV_P_ struct ev_signal *w)
842	{	1287	{
843	ev_clear ((W)w);	1288	ev_clear_pending (EV_A_ (W)w);
844	if (!ev_is_active (w))	1289	if (!ev_is_active (w))
845	return;	1290	return;
846		1291
847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1292	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
849		1294
850	if (!signals [w->signum - 1].head)	1295	if (!signals [w->signum - 1].head)
851	signal (w->signum, SIG_DFL);	1296	signal (w->signum, SIG_DFL);
852	}	1297	}
853		1298
854	void evidle_start (struct ev_idle *w)	1299	void
		1300	ev_child_start (EV_P_ struct ev_child *w)
855	{	1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
856	if (ev_is_active (w))	1305	if (ev_is_active (w))
857	return;	1306	return;
858		1307
859	ev_start ((W)w, ++idlecnt);	1308	ev_start (EV_A_ (W)w, 1);
860	array_needsize (idles, idlemax, idlecnt, );	1309	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
861	idles [idlecnt - 1] = w;
862	}	1310	}
863		1311
864	void evidle_stop (struct ev_idle *w)	1312	void
		1313	ev_child_stop (EV_P_ struct ev_child *w)
865	{	1314	{
866	ev_clear ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
867	if (ev_is_active (w))	1316	if (ev_is_active (w))
868	return;	1317	return;
869		1318
870	idles [w->active - 1] = idles [--idlecnt];
871	ev_stop ((W)w);
872	}
873
874	void evprepare_start (struct ev_prepare *w)
875	{
876	if (ev_is_active (w))
877	return;
878
879	ev_start ((W)w, ++preparecnt);
880	array_needsize (prepares, preparemax, preparecnt, );
881	prepares [preparecnt - 1] = w;
882	}
883
884	void evprepare_stop (struct ev_prepare *w)
885	{
886	ev_clear ((W)w);
887	if (ev_is_active (w))
888	return;
889
890	prepares [w->active - 1] = prepares [--preparecnt];
891	ev_stop ((W)w);
892	}
893
894	void evcheck_start (struct ev_check *w)
895	{
896	if (ev_is_active (w))
897	return;
898
899	ev_start ((W)w, ++checkcnt);
900	array_needsize (checks, checkmax, checkcnt, );
901	checks [checkcnt - 1] = w;
902	}
903
904	void evcheck_stop (struct ev_check *w)
905	{
906	ev_clear ((W)w);
907	if (ev_is_active (w))
908	return;
909
910	checks [w->active - 1] = checks [--checkcnt];
911	ev_stop ((W)w);
912	}
913
914	void evchild_start (struct ev_child *w)
915	{
916	if (ev_is_active (w))
917	return;
918
919	ev_start ((W)w, 1);
920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921	}
922
923	void evchild_stop (struct ev_child *w)
924	{
925	ev_clear ((W)w);
926	if (ev_is_active (w))
927	return;
928
929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1319	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
931	}	1321	}
932		1322
933	/*****************************************************************************/	1323	/*****************************************************************************/
934		1324
935	struct ev_once	1325	struct ev_once
…		…
939	void (cb)(int revents, void arg);	1329	void (cb)(int revents, void arg);
940	void *arg;	1330	void *arg;
941	};	1331	};
942		1332
943	static void	1333	static void
944	once_cb (struct ev_once *once, int revents)	1334	once_cb (EV_P_ struct ev_once *once, int revents)
945	{	1335	{
946	void (cb)(int revents, void arg) = once->cb;	1336	void (cb)(int revents, void arg) = once->cb;
947	void *arg = once->arg;	1337	void *arg = once->arg;
948		1338
949	evio_stop (&once->io);	1339	ev_io_stop (EV_A_ &once->io);
950	evtimer_stop (&once->to);	1340	ev_timer_stop (EV_A_ &once->to);
951	free (once);	1341	free (once);
952		1342
953	cb (revents, arg);	1343	cb (revents, arg);
954	}	1344	}
955		1345
956	static void	1346	static void
957	once_cb_io (struct ev_io *w, int revents)	1347	once_cb_io (EV_P_ struct ev_io *w, int revents)
958	{	1348	{
959	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1349	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
960	}	1350	}
961		1351
962	static void	1352	static void
963	once_cb_to (struct ev_timer *w, int revents)	1353	once_cb_to (EV_P_ struct ev_timer *w, int revents)
964	{	1354	{
965	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1355	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
966	}	1356	}
967		1357
968	void	1358	void
969	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1359	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
970	{	1360	{
971	struct ev_once *once = malloc (sizeof (struct ev_once));	1361	struct ev_once *once = malloc (sizeof (struct ev_once));
972		1362
973	if (!once)	1363	if (!once)
974	cb (EV_ERROR, arg);	1364	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
975	else	1365	else
976	{	1366	{
977	once->cb = cb;	1367	once->cb = cb;
978	once->arg = arg;	1368	once->arg = arg;
979		1369
980	evw_init (&once->io, once_cb_io);	1370	ev_watcher_init (&once->io, once_cb_io);
981
982	if (fd >= 0)	1371	if (fd >= 0)
983	{	1372	{
984	evio_set (&once->io, fd, events);	1373	ev_io_set (&once->io, fd, events);
985	evio_start (&once->io);	1374	ev_io_start (EV_A_ &once->io);
986	}	1375	}
987		1376
988	evw_init (&once->to, once_cb_to);	1377	ev_watcher_init (&once->to, once_cb_to);
989
990	if (timeout >= 0.)	1378	if (timeout >= 0.)
991	{	1379	{
992	evtimer_set (&once->to, timeout, 0.);	1380	ev_timer_set (&once->to, timeout, 0.);
993	evtimer_start (&once->to);	1381	ev_timer_start (EV_A_ &once->to);
994	}	1382	}
995	}	1383	}
996	}	1384	}
997		1385
998	/*****************************************************************************/
999
1000	#if 0
1001
1002	struct ev_io wio;
1003
1004	static void
1005	sin_cb (struct ev_io *w, int revents)
1006	{
1007	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1008	}
1009
1010	static void
1011	ocb (struct ev_timer *w, int revents)
1012	{
1013	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1014	evtimer_stop (w);
1015	evtimer_start (w);
1016	}
1017
1018	static void
1019	scb (struct ev_signal *w, int revents)
1020	{
1021	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022	evio_stop (&wio);
1023	evio_start (&wio);
1024	}
1025
1026	static void
1027	gcb (struct ev_signal *w, int revents)
1028	{
1029	fprintf (stderr, "generic %x\n", revents);
1030
1031	}
1032
1033	int main (void)
1034	{
1035	ev_init (0);
1036
1037	evio_init (&wio, sin_cb, 0, EV_READ);
1038	evio_start (&wio);
1039
1040	struct ev_timer t[10000];
1041
1042	#if 0
1043	int i;
1044	for (i = 0; i < 10000; ++i)
1045	{
1046	struct ev_timer *w = t + i;
1047	evw_init (w, ocb, i);
1048	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049	evtimer_start (w);
1050	if (drand48 () < 0.5)
1051	evtimer_stop (w);
1052	}
1053	#endif
1054
1055	struct ev_timer t1;
1056	evtimer_init (&t1, ocb, 5, 10);
1057	evtimer_start (&t1);
1058
1059	struct ev_signal sig;
1060	evsignal_init (&sig, scb, SIGQUIT);
1061	evsignal_start (&sig);
1062
1063	struct ev_check cw;
1064	evcheck_init (&cw, gcb);
1065	evcheck_start (&cw);
1066
1067	struct ev_idle iw;
1068	evidle_init (&iw, gcb);
1069	evidle_start (&iw);
1070
1071	ev_loop (0);
1072
1073	return 0;
1074	}
1075
1076	#endif
1077
1078
1079
1080

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Comparing libev/ev.c (file contents): Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs. Revision 1.60 by root, Sun Nov 4 18:29:44 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.60 by root, Sun Nov 4 18:29:44 2007 UTC