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

Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 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>
…		…
36		63
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>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
41	#include <sys/time.h>	72	#include <sys/time.h>
42	#include <time.h>	73	#include <time.h>
43		74
		75	/**/
		76
44	#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
45	# ifdef CLOCK_MONOTONIC	103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
46	# define HAVE_MONOTONIC 1	105	# define EV_USE_MONOTONIC 0
47	# endif	106	#endif
48	#endif
49		107
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	108	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
60	#endif	111	#endif
		112
		113	/**/
61		114
62	#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) */
63	#define MAX_BLOCKTIME 60.	116	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		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 */
64		119
65	#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)
66		135
67	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
70		139
71	static ev_tstamp now, diff; /* monotonic clock */	140	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74
75	static int have_monotonic; /* runtime */
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		141
81	/*****************************************************************************/	142	/*****************************************************************************/
82		143
83	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
84	ev_time (void)	178	ev_time (void)
85	{	179	{
86	#if HAVE_REALTIME	180	#if EV_USE_REALTIME
87	struct timespec ts;	181	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	183	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	184	#else
91	struct timeval tv;	185	struct timeval tv;
92	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	188	#endif
95	}	189	}
96		190
97	static ev_tstamp	191	inline ev_tstamp
98	get_clock (void)	192	get_clock (void)
99	{	193	{
100	#if HAVE_MONOTONIC	194	#if EV_USE_MONOTONIC
101	if (have_monotonic)	195	if (expect_true (have_monotonic))
102	{	196	{
103	struct timespec ts;	197	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	200	}
107	#endif	201	#endif
108		202
109	return ev_time ();	203	return ev_time ();
110	}	204	}
111		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
112	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
114	{ \	216	{ \
115	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	\
116	base = realloc (base, sizeof (base) (newcnt)); \	224	base = realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	225	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	226	cur = newcnt; \
119	}	227	}
120		228
121	/*****************************************************************************/	229	/*****************************************************************************/
122		230
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	231	static void
136	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
137	{	233	{
138	while (count--)	234	while (count--)
139	{	235	{
140	base->head = 0;	236	base->head = 0;
141	base->wev = base->rev = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
142	++base;	240	++base;
143	}	241	}
144	}	242	}
145		243
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void	244	static void
156	event (W w, int events)	245	event (EV_P_ W w, int events)
157	{	246	{
158	if (w->active)	247	if (w->pending)
159	{	248	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	249	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		250	return;
164	}	251	}
165	}
166		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
167	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
168	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
169	{	270	{
170	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	272	struct ev_io *w;
172		273
173	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	275	{
175	int ev = w->events & events;	276	int ev = w->events & events;
176		277
177	if (ev)	278	if (ev)
178	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
179	}	280	}
180	}	281	}
181		282
		283	/*****************************************************************************/
		284
182	static void	285	static void
183	queue_events (W *events, int eventcnt, int type)	286	fd_reify (EV_P)
184	{	287	{
185	int i;	288	int i;
186		289
187	for (i = 0; i < eventcnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
188	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	}
189	}	336	}
190		337
191	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
192	static void	339	static void
193	fd_recheck ()	340	fd_ebadf (EV_P)
194	{	341	{
195	int fd;	342	int fd;
196		343
197	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	345	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
201	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	}
202	}	378	}
203		379
204	/*****************************************************************************/	380	/*****************************************************************************/
205		381
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	382	static void
213	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
214	{	384	{
215	WT w = timers [k];	385	WT w = heap [k];
216		386
217	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
218	{	388	{
219	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
221	k >>= 1;	391	k >>= 1;
222	}	392	}
223		393
224	timers [k] = w;	394	heap [k] = w;
225	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
226		396
227	}	397	}
228		398
229	static void	399	static void
230	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
231	{	401	{
232	WT w = timers [k];	402	WT w = heap [k];
233		403
234	while (k < (N >> 1))	404	while (k < (N >> 1))
235	{	405	{
236	int j = k << 1;	406	int j = k << 1;
237		407
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	409	++j;
240		410
241	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
242	break;	412	break;
243		413
244	timers [k] = timers [j];	414	heap [k] = heap [j];
245	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
246	k = j;	416	k = j;
247	}	417	}
248		418
249	timers [k] = w;	419	heap [k] = w;
250	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
251	}	421	}
252		422
253	/*****************************************************************************/	423	/*****************************************************************************/
254		424
255	typedef struct	425	typedef struct
256	{	426	{
257	struct ev_signal *head;	427	struct ev_watcher_list *head;
258	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
259	} ANSIG;	429	} ANSIG;
260		430
261	static ANSIG *signals;	431	static ANSIG *signals;
262	static int signalmax;	432	static int signalmax;
263		433
264	static int sigpipe [2];	434	static int sigpipe [2];
265	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	436	static struct ev_io sigev;
267		437
268	static void	438	static void
269	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
270	{	440	{
271	while (count--)	441	while (count--)
272	{	442	{
273	base->head = 0;	443	base->head = 0;
274	base->gotsig = 0;	444	base->gotsig = 0;
		445
275	++base;	446	++base;
276	}	447	}
277	}	448	}
278		449
279	static void	450	static void
…		…
281	{	452	{
282	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
283		454
284	if (!gotsig)	455	if (!gotsig)
285	{	456	{
		457	int old_errno = errno;
286	gotsig = 1;	458	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
288	}	461	}
289	}	462	}
290		463
291	static void	464	static void
292	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	466	{
294	struct ev_signal *w;	467	struct ev_watcher_list *w;
295	int sig;	468	int signum;
296		469
		470	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	471	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		472
300	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
302	{	475	{
303	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
304		477
305	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
307	}	480	}
308	}	481	}
309		482
310	static void	483	static void
311	siginit (void)	484	siginit (EV_P)
312	{	485	{
		486	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		489
316	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
319		494
320	evio_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	498	}
323		499
324	/*****************************************************************************/	500	/*****************************************************************************/
325		501
326	static struct ev_idle **idles;	502	#ifndef WIN32
327	static int idlemax, idlecnt;
328		503
329	static struct ev_check **checks;	504	static struct ev_child *childs [PID_HASHSIZE];
330	static int checkmax, checkcnt;	505	static struct ev_signal childev;
		506
		507	#ifndef WCONTINUED
		508	# define WCONTINUED 0
		509	#endif
		510
		511	static void
		512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		513	{
		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	{
		529	int pid, status;
		530
		531	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		532	{
		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
331		542
332	/*****************************************************************************/	543	/*****************************************************************************/
333		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
334	#if HAVE_EPOLL	548	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	549	# include "ev_epoll.c"
336	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
337	#if HAVE_SELECT	554	#if EV_USE_SELECT
338	# include "ev_select.c"	555	# include "ev_select.c"
339	#endif	556	#endif
340		557
341	int ev_init (int flags)	558	int
		559	ev_version_major (void)
342	{	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	{
343	#if HAVE_MONOTONIC	593	#if EV_USE_MONOTONIC
344	{	594	{
345	struct timespec ts;	595	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	597	have_monotonic = 1;
348	}	598	}
349	#endif	599	#endif
350		600
351	ev_now = ev_time ();	601	rt_now = ev_time ();
352	now = get_clock ();	602	mn_now = get_clock ();
353	diff = ev_now - now;	603	now_floor = mn_now;
		604	rtmn_diff = rt_now - mn_now;
354		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])
355	if (pipe (sigpipe))	702	if (pipe (sigpipe))
356	return 0;	703	return 0;
357		704
358	ev_method = EVMETHOD_NONE;	705	if (!default_loop)
359	#if HAVE_EPOLL
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
361	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365
366	if (ev_method)
367	{	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))
		716	{
368	evw_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
369	siginit ();	719	siginit (EV_A);
370	}
371		720
372	return ev_method;	721	#ifndef WIN32
373	}	722	ev_signal_init (&childev, childcb, SIGCHLD);
374		723	ev_set_priority (&childev, EV_MAXPRI);
375	/*****************************************************************************/	724	ev_signal_start (EV_A_ &childev);
376		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	void ev_prefork (void)
378	{
379	/* nop */
380	}
381
382	void ev_postfork_parent (void)
383	{
384	/* nop */
385	}
386
387	void ev_postfork_child (void)
388	{
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();
392	#endif	726	#endif
		727	}
		728	else
		729	default_loop = 0;
		730	}
393		731
		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 */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
394	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);
395	close (sigpipe [0]);	764	close (sigpipe [0]);
396	close (sigpipe [1]);	765	close (sigpipe [1]);
397	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
398	siginit ();	769	siginit (EV_A);
399	}	770	}
400		771
401	/*****************************************************************************/	772	/*****************************************************************************/
402		773
403	static void	774	static void
404	fd_reify (void)	775	call_pending (EV_P)
405	{	776	{
406	int i;	777	int pri;
407		778
408	for (i = 0; i < fdchangecnt; ++i)	779	for (pri = NUMPRI; pri--; )
409	{	780	while (pendingcnt [pri])
410	int fd = fdchanges [i];
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413
414	int wev = 0;
415
416	for (w = anfd->head; w; w = w->next)
417	wev \|= w->events;
418
419	if (anfd->wev != wev)
420	{	781	{
421	method_modify (fd, anfd->wev, wev);
422	anfd->wev = wev;
423	}
424	}
425
426	fdchangecnt = 0;
427	}
428
429	static void
430	call_pending ()
431	{
432	while (pendingcnt)
433	{
434	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		783
436	if (p->w)	784	if (p->w)
437	{	785	{
438	p->w->pending = 0;	786	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
440	}	788	}
441	}	789	}
442	}	790	}
443		791
444	static void	792	static void
445	timers_reify ()	793	timers_reify (EV_P)
446	{	794	{
447	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
448	{	796	{
449	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
450
451	event ((W)w, EV_TIMEOUT);
452		798
453	/* first reschedule or stop timer */	799	/* first reschedule or stop timer */
454	if (w->repeat)	800	if (w->repeat)
455	{	801	{
		802	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	803	w->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	804	downheap ((WT *)timers, timercnt, 0);
459	}	805	}
460	else	806	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	807	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		808
		809	event (EV_A_ (W)w, EV_TIMEOUT);
		810	}
		811	}
		812
465	static void	813	static void
466	periodics_reify ()	814	periodics_reify (EV_P)
467	{	815	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	816	while (periodiccnt && periodics [0]->at <= rt_now)
469	{	817	{
470	struct ev_periodic *w = periodics [0];	818	struct ev_periodic *w = periodics [0];
471		819
472	/* first reschedule or stop timer */	820	/* first reschedule or stop timer */
473	if (w->interval)	821	if (w->interval)
474	{	822	{
475	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;
476	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));
477	downheap ((WT *)periodics, periodiccnt, 0);	825	downheap ((WT *)periodics, periodiccnt, 0);
478	}	826	}
479	else	827	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	828	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		829
482	event ((W)w, EV_TIMEOUT);	830	event (EV_A_ (W)w, EV_PERIODIC);
483	}	831	}
484	}	832	}
485		833
486	static void	834	static void
487	periodics_reschedule (ev_tstamp diff)	835	periodics_reschedule (EV_P)
488	{	836	{
489	int i;	837	int i;
490		838
491	/* adjust periodics after time jump */	839	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	840	for (i = 0; i < periodiccnt; ++i)
493	{	841	{
494	struct ev_periodic *w = periodics [i];	842	struct ev_periodic *w = periodics [i];
495		843
496	if (w->interval)	844	if (w->interval)
497	{	845	{
498	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;
499		847
500	if (fabs (diff) >= 1e-4)	848	if (fabs (diff) >= 1e-4)
501	{	849	{
502	evperiodic_stop (w);	850	ev_periodic_stop (EV_A_ w);
503	evperiodic_start (w);	851	ev_periodic_start (EV_A_ w);
504		852
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	853	i = 0; /* restart loop, inefficient, but time jumps should be rare */
506	}	854	}
507	}	855	}
508	}	856	}
509	}	857	}
510		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
511	static void	877	static void
512	time_update ()	878	time_update (EV_P)
513	{	879	{
514	int i;	880	int i;
515		881
516	ev_now = ev_time ();	882	#if EV_USE_MONOTONIC
517
518	if (have_monotonic)	883	if (expect_true (have_monotonic))
519	{	884	{
520	ev_tstamp odiff = diff;	885	if (time_update_monotonic (EV_A))
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	886	{
524	now = get_clock ();	887	ev_tstamp odiff = rtmn_diff;
		888
		889	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		890	{
525	diff = ev_now - now;	891	rtmn_diff = rt_now - mn_now;
526		892
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)	893	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
528	return; /* all is well */	894	return; /* all is well */
529		895
530	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) */
531	}	904	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}	905	}
536	else	906	else
		907	#endif
537	{	908	{
538	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))
539	{	912	{
540	periodics_reschedule (ev_now - now);	913	periodics_reschedule (EV_A);
541		914
542	/* 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 */
543	for (i = 0; i < timercnt; ++i)	916	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	917	timers [i]->at += rt_now - mn_now;
545	}	918	}
546		919
547	now = ev_now;	920	mn_now = rt_now;
548	}	921	}
549	}	922	}
550		923
551	int ev_loop_done;	924	void
		925	ev_ref (EV_P)
		926	{
		927	++activecnt;
		928	}
552		929
		930	void
		931	ev_unref (EV_P)
		932	{
		933	--activecnt;
		934	}
		935
		936	static int loop_done;
		937
		938	void
553	void ev_loop (int flags)	939	ev_loop (EV_P_ int flags)
554	{	940	{
555	double block;	941	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	942	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
557
558	if (checkcnt)
559	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);
561	call_pending ();
562	}
563		943
564	do	944	do
565	{	945	{
		946	/* queue check watchers (and execute them) */
		947	if (expect_false (preparecnt))
		948	{
		949	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		950	call_pending (EV_A);
		951	}
		952
566	/* update fd-related kernel structures */	953	/* update fd-related kernel structures */
567	fd_reify ();	954	fd_reify (EV_A);
568		955
569	/* calculate blocking time */	956	/* calculate blocking time */
570		957
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	958	/* we only need this for !monotonic clockor timers, but as we basically
		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	{
572	ev_now = ev_time ();	966	rt_now = ev_time ();
		967	mn_now = rt_now;
		968	}
573		969
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	970	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	971	block = 0.;
576	else	972	else
577	{	973	{
578	block = MAX_BLOCKTIME;	974	block = MAX_BLOCKTIME;
579		975
580	if (timercnt)	976	if (timercnt)
581	{	977	{
582	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;
583	if (block > to) block = to;	979	if (block > to) block = to;
584	}	980	}
585		981
586	if (periodiccnt)	982	if (periodiccnt)
587	{	983	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	984	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
589	if (block > to) block = to;	985	if (block > to) block = to;
590	}	986	}
591		987
592	if (block < 0.) block = 0.;	988	if (block < 0.) block = 0.;
593	}	989	}
594		990
595	method_poll (block);	991	method_poll (EV_A_ block);
596		992
597	/* update ev_now, do magic */	993	/* update rt_now, do magic */
598	time_update ();	994	time_update (EV_A);
599		995
600	/* queue pending timers and reschedule them */	996	/* queue pending timers and reschedule them */
		997	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	998	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		999
604	/* queue idle watchers unless io or timers are pending */	1000	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1001	if (!pendingcnt)
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1002	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1003
608	/* queue check and possibly idle watchers */	1004	/* queue check watchers, to be executed first */
		1005	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1006	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1007
611	call_pending ();	1008	call_pending (EV_A);
612	}	1009	}
613	while (!ev_loop_done);	1010	while (activecnt && !loop_done);
614		1011
615	if (ev_loop_done != 2)	1012	if (loop_done != 2)
616	ev_loop_done = 0;	1013	loop_done = 0;
		1014	}
		1015
		1016	void
		1017	ev_unloop (EV_P_ int how)
		1018	{
		1019	loop_done = how;
617	}	1020	}
618		1021
619	/*****************************************************************************/	1022	/*****************************************************************************/
620		1023
621	static void	1024	inline void
622	wlist_add (WL *head, WL elem)	1025	wlist_add (WL *head, WL elem)
623	{	1026	{
624	elem->next = *head;	1027	elem->next = *head;
625	*head = elem;	1028	*head = elem;
626	}	1029	}
627		1030
628	static void	1031	inline void
629	wlist_del (WL *head, WL elem)	1032	wlist_del (WL *head, WL elem)
630	{	1033	{
631	while (*head)	1034	while (*head)
632	{	1035	{
633	if (*head == elem)	1036	if (*head == elem)
…		…
638		1041
639	head = &(*head)->next;	1042	head = &(*head)->next;
640	}	1043	}
641	}	1044	}
642		1045
643	static void	1046	inline void
644	ev_clear (W w)	1047	ev_clear_pending (EV_P_ W w)
645	{	1048	{
646	if (w->pending)	1049	if (w->pending)
647	{	1050	{
648	pendings [w->pending - 1].w = 0;	1051	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1052	w->pending = 0;
650	}	1053	}
651	}	1054	}
652		1055
653	static void	1056	inline void
654	ev_start (W w, int active)	1057	ev_start (EV_P_ W w, int active)
655	{	1058	{
		1059	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1060	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1061
656	w->active = active;	1062	w->active = active;
		1063	ev_ref (EV_A);
657	}	1064	}
658		1065
659	static void	1066	inline void
660	ev_stop (W w)	1067	ev_stop (EV_P_ W w)
661	{	1068	{
		1069	ev_unref (EV_A);
662	w->active = 0;	1070	w->active = 0;
663	}	1071	}
664		1072
665	/*****************************************************************************/	1073	/*****************************************************************************/
666		1074
667	void	1075	void
668	evio_start (struct ev_io *w)	1076	ev_io_start (EV_P_ struct ev_io *w)
669	{	1077	{
		1078	int fd = w->fd;
		1079
670	if (ev_is_active (w))	1080	if (ev_is_active (w))
671	return;	1081	return;
672		1082
673	int fd = w->fd;	1083	assert (("ev_io_start called with negative fd", fd >= 0));
674		1084
675	ev_start ((W)w, 1);	1085	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1086	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1087	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1088
679	++fdchangecnt;	1089	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1090	}
683		1091
684	void	1092	void
685	evio_stop (struct ev_io *w)	1093	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1094	{
687	ev_clear ((W)w);	1095	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1096	if (!ev_is_active (w))
689	return;	1097	return;
690		1098
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1099	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1100	ev_stop (EV_A_ (W)w);
693		1101
694	++fdchangecnt;	1102	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1103	}
698		1104
699	void	1105	void
700	evtimer_start (struct ev_timer *w)	1106	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1107	{
702	if (ev_is_active (w))	1108	if (ev_is_active (w))
703	return;	1109	return;
704		1110
705	w->at += now;	1111	w->at += mn_now;
706		1112
707	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.));
708		1114
709	ev_start ((W)w, ++timercnt);	1115	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1116	array_needsize (timers, timermax, timercnt, );
711	timers [timercnt - 1] = w;	1117	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1118	upheap ((WT *)timers, timercnt - 1);
713	}	1119	}
714		1120
715	void	1121	void
716	evtimer_stop (struct ev_timer *w)	1122	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1123	{
718	ev_clear ((W)w);	1124	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1125	if (!ev_is_active (w))
720	return;	1126	return;
721		1127
722	if (w->active < timercnt--)	1128	if (w->active < timercnt--)
723	{	1129	{
…		…
725	downheap ((WT *)timers, timercnt, w->active - 1);	1131	downheap ((WT *)timers, timercnt, w->active - 1);
726	}	1132	}
727		1133
728	w->at = w->repeat;	1134	w->at = w->repeat;
729		1135
730	ev_stop ((W)w);	1136	ev_stop (EV_A_ (W)w);
731	}	1137	}
732		1138
733	void	1139	void
734	evtimer_again (struct ev_timer *w)	1140	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1141	{
736	if (ev_is_active (w))	1142	if (ev_is_active (w))
737	{	1143	{
738	if (w->repeat)	1144	if (w->repeat)
739	{	1145	{
740	w->at = now + w->repeat;	1146	w->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1147	downheap ((WT *)timers, timercnt, w->active - 1);
742	}	1148	}
743	else	1149	else
744	evtimer_stop (w);	1150	ev_timer_stop (EV_A_ w);
745	}	1151	}
746	else if (w->repeat)	1152	else if (w->repeat)
747	evtimer_start (w);	1153	ev_timer_start (EV_A_ w);
748	}	1154	}
749		1155
750	void	1156	void
751	evperiodic_start (struct ev_periodic *w)	1157	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1158	{
753	if (ev_is_active (w))	1159	if (ev_is_active (w))
754	return;	1160	return;
755		1161
756	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.));
757		1163
758	/* 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 */
759	if (w->interval)	1165	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1166	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
761		1167
762	ev_start ((W)w, ++periodiccnt);	1168	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1169	array_needsize (periodics, periodicmax, periodiccnt, );
764	periodics [periodiccnt - 1] = w;	1170	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1171	upheap ((WT *)periodics, periodiccnt - 1);
766	}	1172	}
767		1173
768	void	1174	void
769	evperiodic_stop (struct ev_periodic *w)	1175	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1176	{
771	ev_clear ((W)w);	1177	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1178	if (!ev_is_active (w))
773	return;	1179	return;
774		1180
775	if (w->active < periodiccnt--)	1181	if (w->active < periodiccnt--)
776	{	1182	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1183	periodics [w->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1184	downheap ((WT *)periodics, periodiccnt, w->active - 1);
779	}	1185	}
780		1186
781	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
782	}	1188	}
783		1189
784	void	1190	void
785	evsignal_start (struct ev_signal *w)	1191	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1192	{
787	if (ev_is_active (w))	1193	if (ev_is_active (w))
788	return;	1194	return;
789		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
790	ev_start ((W)w, 1);	1271	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1272	array_needsize (signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1273	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1274
794	if (!w->next)	1275	if (!w->next)
795	{	1276	{
796	struct sigaction sa;	1277	struct sigaction sa;
797	sa.sa_handler = sighandler;	1278	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1279	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1280	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1281	sigaction (w->signum, &sa, 0);
801	}	1282	}
802	}	1283	}
803		1284
804	void	1285	void
805	evsignal_stop (struct ev_signal *w)	1286	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1287	{
807	ev_clear ((W)w);	1288	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1289	if (!ev_is_active (w))
809	return;	1290	return;
810		1291
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1292	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
813		1294
814	if (!signals [w->signum - 1].head)	1295	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1296	signal (w->signum, SIG_DFL);
816	}	1297	}
817		1298
818	void evidle_start (struct ev_idle *w)	1299	void
		1300	ev_child_start (EV_P_ struct ev_child *w)
819	{	1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
820	if (ev_is_active (w))	1305	if (ev_is_active (w))
821	return;	1306	return;
822		1307
823	ev_start ((W)w, ++idlecnt);	1308	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1309	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1310	}
827		1311
828	void evidle_stop (struct ev_idle *w)	1312	void
		1313	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1314	{
830	ev_clear ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1316	if (ev_is_active (w))
832	return;	1317	return;
833		1318
834	idles [w->active - 1] = idles [--idlecnt];	1319	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
836	}
837
838	void evcheck_start (struct ev_check *w)
839	{
840	if (ev_is_active (w))
841	return;
842
843	ev_start ((W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );
845	checks [checkcnt - 1] = w;
846	}
847
848	void evcheck_stop (struct ev_check *w)
849	{
850	ev_clear ((W)w);
851	if (ev_is_active (w))
852	return;
853
854	checks [w->active - 1] = checks [--checkcnt];
855	ev_stop ((W)w);
856	}	1321	}
857		1322
858	/*****************************************************************************/	1323	/*****************************************************************************/
859		1324
860	struct ev_once	1325	struct ev_once
…		…
864	void (cb)(int revents, void arg);	1329	void (cb)(int revents, void arg);
865	void *arg;	1330	void *arg;
866	};	1331	};
867		1332
868	static void	1333	static void
869	once_cb (struct ev_once *once, int revents)	1334	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1335	{
871	void (cb)(int revents, void arg) = once->cb;	1336	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	1337	void *arg = once->arg;
873		1338
874	evio_stop (&once->io);	1339	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1340	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1341	free (once);
877		1342
878	cb (revents, arg);	1343	cb (revents, arg);
879	}	1344	}
880		1345
881	static void	1346	static void
882	once_cb_io (struct ev_io *w, int revents)	1347	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1348	{
884	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);
885	}	1350	}
886		1351
887	static void	1352	static void
888	once_cb_to (struct ev_timer *w, int revents)	1353	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1354	{
890	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);
891	}	1356	}
892		1357
893	void	1358	void
894	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)
895	{	1360	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1361	struct ev_once *once = malloc (sizeof (struct ev_once));
897		1362
898	if (!once)	1363	if (!once)
899	cb (EV_ERROR, arg);	1364	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
900	else	1365	else
901	{	1366	{
902	once->cb = cb;	1367	once->cb = cb;
903	once->arg = arg;	1368	once->arg = arg;
904		1369
905	evw_init (&once->io, once_cb_io);	1370	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1371	if (fd >= 0)
908	{	1372	{
909	evio_set (&once->io, fd, events);	1373	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1374	ev_io_start (EV_A_ &once->io);
911	}	1375	}
912		1376
913	evw_init (&once->to, once_cb_to);	1377	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1378	if (timeout >= 0.)
916	{	1379	{
917	evtimer_set (&once->to, timeout, 0.);	1380	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1381	ev_timer_start (EV_A_ &once->to);
919	}	1382	}
920	}	1383	}
921	}	1384	}
922		1385
923	/*****************************************************************************/
924
925	#if 0
926
927	struct ev_io wio;
928
929	static void
930	sin_cb (struct ev_io *w, int revents)
931	{
932	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933	}
934
935	static void
936	ocb (struct ev_timer *w, int revents)
937	{
938	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939	evtimer_stop (w);
940	evtimer_start (w);
941	}
942
943	static void
944	scb (struct ev_signal *w, int revents)
945	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);
948	evio_start (&wio);
949	}
950
951	static void
952	gcb (struct ev_signal *w, int revents)
953	{
954	fprintf (stderr, "generic %x\n", revents);
955
956	}
957
958	int main (void)
959	{
960	ev_init (0);
961
962	evio_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);
964
965	struct ev_timer t[10000];
966
967	#if 0
968	int i;
969	for (i = 0; i < 10000; ++i)
970	{
971	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);
975	if (drand48 () < 0.5)
976	evtimer_stop (w);
977	}
978	#endif
979
980	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);
983
984	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);
987
988	struct ev_check cw;
989	evcheck_init (&cw, gcb);
990	evcheck_start (&cw);
991
992	struct ev_idle iw;
993	evidle_init (&iw, gcb);
994	evidle_start (&iw);
995
996	ev_loop (0);
997
998	return 0;
999	}
1000
1001	#endif
1002
1003
1004
1005

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Comparing libev/ev.c (file contents): Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs. Revision 1.60 by root, Sun Nov 4 18:29:44 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.60 by root, Sun Nov 4 18:29:44 2007 UTC