[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 1.58 by root, Sun Nov 4 16:52:52 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_EMBED
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
36		41
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
41	#include <sys/time.h>	50	#include <sys/time.h>
42	#include <time.h>	51	#include <time.h>
43		52
		53	/**/
		54
44	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
45	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
46	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
47	# endif	84	#endif
48	#endif
49		85
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	86	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
60	#endif	89	#endif
		90
		91	/**/
61		92
62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
64		97
		98	#ifndef EV_EMBED
65	#include "ev.h"	99	# include "ev.h"
		100	#endif
		101
		102	#if __GNUC__ >= 3
		103	# define expect(expr,value) __builtin_expect ((expr),(value))
		104	# define inline inline
		105	#else
		106	# define expect(expr,value) (expr)
		107	# define inline static
		108	#endif
		109
		110	#define expect_false(expr) expect ((expr) != 0, 0)
		111	#define expect_true(expr) expect ((expr) != 0, 1)
		112
		113	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		114	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
66		115
67	typedef struct ev_watcher *W;	116	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	117	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	118	typedef struct ev_watcher_time *WT;
70		119
71	static ev_tstamp now, diff; /* monotonic clock */	120	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		121
81	/*****************************************************************************/	122	/*****************************************************************************/
82		123
83	ev_tstamp	124	typedef struct
		125	{
		126	struct ev_watcher_list *head;
		127	unsigned char events;
		128	unsigned char reify;
		129	} ANFD;
		130
		131	typedef struct
		132	{
		133	W w;
		134	int events;
		135	} ANPENDING;
		136
		137	#if EV_MULTIPLICITY
		138
		139	struct ev_loop
		140	{
		141	# define VAR(name,decl) decl;
		142	# include "ev_vars.h"
		143	};
		144	# undef VAR
		145	# include "ev_wrap.h"
		146
		147	#else
		148
		149	# define VAR(name,decl) static decl;
		150	# include "ev_vars.h"
		151	# undef VAR
		152
		153	#endif
		154
		155	/*****************************************************************************/
		156
		157	inline ev_tstamp
84	ev_time (void)	158	ev_time (void)
85	{	159	{
86	#if HAVE_REALTIME	160	#if EV_USE_REALTIME
87	struct timespec ts;	161	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	162	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	163	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	164	#else
91	struct timeval tv;	165	struct timeval tv;
92	gettimeofday (&tv, 0);	166	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	167	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	168	#endif
95	}	169	}
96		170
97	static ev_tstamp	171	inline ev_tstamp
98	get_clock (void)	172	get_clock (void)
99	{	173	{
100	#if HAVE_MONOTONIC	174	#if EV_USE_MONOTONIC
101	if (have_monotonic)	175	if (expect_true (have_monotonic))
102	{	176	{
103	struct timespec ts;	177	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	178	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	179	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	180	}
107	#endif	181	#endif
108		182
109	return ev_time ();	183	return ev_time ();
110	}	184	}
111		185
		186	ev_tstamp
		187	ev_now (EV_P)
		188	{
		189	return rt_now;
		190	}
		191
		192	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		193
112	#define array_needsize(base,cur,cnt,init) \	194	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	195	if (expect_false ((cnt) > cur)) \
114	{ \	196	{ \
115	int newcnt = cur ? cur << 1 : 16; \	197	int newcnt = cur; \
		198	do \
		199	{ \
		200	newcnt = array_roundsize (base, newcnt << 1); \
		201	} \
		202	while ((cnt) > newcnt); \
		203	\
116	base = realloc (base, sizeof (base) (newcnt)); \	204	base = realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	205	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	206	cur = newcnt; \
119	}	207	}
120		208
121	/*****************************************************************************/	209	/*****************************************************************************/
122		210
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	211	static void
136	anfds_init (ANFD *base, int count)	212	anfds_init (ANFD *base, int count)
137	{	213	{
138	while (count--)	214	while (count--)
139	{	215	{
140	base->head = 0;	216	base->head = 0;
141	base->wev = base->rev = EV_NONE;	217	base->events = EV_NONE;
		218	base->reify = 0;
		219
142	++base;	220	++base;
143	}	221	}
144	}	222	}
145		223
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	224	static void
156	event (W w, int events)	225	event (EV_P_ W w, int events)
157	{	226	{
158	if (w->active)	227	if (w->pending)
159	{	228	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	229	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		230	return;
164	}	231	}
165	}
166		232
		233	w->pending = ++pendingcnt [ABSPRI (w)];
		234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		235	pendings [ABSPRI (w)][w->pending - 1].w = w;
		236	pendings [ABSPRI (w)][w->pending - 1].events = events;
		237	}
		238
167	static void	239	static void
		240	queue_events (EV_P_ W *events, int eventcnt, int type)
		241	{
		242	int i;
		243
		244	for (i = 0; i < eventcnt; ++i)
		245	event (EV_A_ events [i], type);
		246	}
		247
		248	static void
168	fd_event (int fd, int events)	249	fd_event (EV_P_ int fd, int events)
169	{	250	{
170	ANFD *anfd = anfds + fd;	251	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	252	struct ev_io *w;
172		253
173	for (w = anfd->head; w; w = w->next)	254	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	255	{
175	int ev = w->events & events;	256	int ev = w->events & events;
176		257
177	if (ev)	258	if (ev)
178	event ((W)w, ev);	259	event (EV_A_ (W)w, ev);
179	}	260	}
180	}	261	}
181		262
		263	/*****************************************************************************/
		264
182	static void	265	static void
183	queue_events (W *events, int eventcnt, int type)	266	fd_reify (EV_P)
184	{	267	{
185	int i;	268	int i;
186		269
187	for (i = 0; i < eventcnt; ++i)	270	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	271	{
		272	int fd = fdchanges [i];
		273	ANFD *anfd = anfds + fd;
		274	struct ev_io *w;
		275
		276	int events = 0;
		277
		278	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		279	events \|= w->events;
		280
		281	anfd->reify = 0;
		282
		283	if (anfd->events != events)
		284	{
		285	method_modify (EV_A_ fd, anfd->events, events);
		286	anfd->events = events;
		287	}
		288	}
		289
		290	fdchangecnt = 0;
		291	}
		292
		293	static void
		294	fd_change (EV_P_ int fd)
		295	{
		296	if (anfds [fd].reify \|\| fdchangecnt < 0)
		297	return;
		298
		299	anfds [fd].reify = 1;
		300
		301	++fdchangecnt;
		302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		303	fdchanges [fdchangecnt - 1] = fd;
		304	}
		305
		306	static void
		307	fd_kill (EV_P_ int fd)
		308	{
		309	struct ev_io *w;
		310
		311	while ((w = (struct ev_io *)anfds [fd].head))
		312	{
		313	ev_io_stop (EV_A_ w);
		314	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		315	}
189	}	316	}
190		317
191	/* called on EBADF to verify fds */	318	/* called on EBADF to verify fds */
192	static void	319	static void
193	fd_recheck ()	320	fd_ebadf (EV_P)
194	{	321	{
195	int fd;	322	int fd;
196		323
197	for (fd = 0; fd < anfdmax; ++fd)	324	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	325	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	327	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	328	}
		329
		330	/* called on ENOMEM in select/poll to kill some fds and retry */
		331	static void
		332	fd_enomem (EV_P)
		333	{
		334	int fd = anfdmax;
		335
		336	while (fd--)
		337	if (anfds [fd].events)
		338	{
		339	close (fd);
		340	fd_kill (EV_A_ fd);
		341	return;
		342	}
		343	}
		344
		345	/* susually called after fork if method needs to re-arm all fds from scratch */
		346	static void
		347	fd_rearm_all (EV_P)
		348	{
		349	int fd;
		350
		351	/* this should be highly optimised to not do anything but set a flag */
		352	for (fd = 0; fd < anfdmax; ++fd)
		353	if (anfds [fd].events)
		354	{
		355	anfds [fd].events = 0;
		356	fd_change (fd);
		357	}
202	}	358	}
203		359
204	/*****************************************************************************/	360	/*****************************************************************************/
205		361
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	362	static void
213	upheap (WT *timers, int k)	363	upheap (WT *heap, int k)
214	{	364	{
215	WT w = timers [k];	365	WT w = heap [k];
216		366
217	while (k && timers [k >> 1]->at > w->at)	367	while (k && heap [k >> 1]->at > w->at)
218	{	368	{
219	timers [k] = timers [k >> 1];	369	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	370	heap [k]->active = k + 1;
221	k >>= 1;	371	k >>= 1;
222	}	372	}
223		373
224	timers [k] = w;	374	heap [k] = w;
225	timers [k]->active = k + 1;	375	heap [k]->active = k + 1;
226		376
227	}	377	}
228		378
229	static void	379	static void
230	downheap (WT *timers, int N, int k)	380	downheap (WT *heap, int N, int k)
231	{	381	{
232	WT w = timers [k];	382	WT w = heap [k];
233		383
234	while (k < (N >> 1))	384	while (k < (N >> 1))
235	{	385	{
236	int j = k << 1;	386	int j = k << 1;
237		387
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	389	++j;
240		390
241	if (w->at <= timers [j]->at)	391	if (w->at <= heap [j]->at)
242	break;	392	break;
243		393
244	timers [k] = timers [j];	394	heap [k] = heap [j];
245	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
246	k = j;	396	k = j;
247	}	397	}
248		398
249	timers [k] = w;	399	heap [k] = w;
250	timers [k]->active = k + 1;	400	heap [k]->active = k + 1;
251	}	401	}
252		402
253	/*****************************************************************************/	403	/*****************************************************************************/
254		404
255	typedef struct	405	typedef struct
256	{	406	{
257	struct ev_signal *head;	407	struct ev_watcher_list *head;
258	sig_atomic_t gotsig;	408	sig_atomic_t volatile gotsig;
259	} ANSIG;	409	} ANSIG;
260		410
261	static ANSIG *signals;	411	static ANSIG *signals;
262	static int signalmax;	412	static int signalmax;
263		413
264	static int sigpipe [2];	414	static int sigpipe [2];
265	static sig_atomic_t gotsig;	415	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;
267		416
268	static void	417	static void
269	signals_init (ANSIG *base, int count)	418	signals_init (ANSIG *base, int count)
270	{	419	{
271	while (count--)	420	while (count--)
272	{	421	{
273	base->head = 0;	422	base->head = 0;
274	base->gotsig = 0;	423	base->gotsig = 0;
		424
275	++base;	425	++base;
276	}	426	}
277	}	427	}
278		428
279	static void	429	static void
…		…
281	{	431	{
282	signals [signum - 1].gotsig = 1;	432	signals [signum - 1].gotsig = 1;
283		433
284	if (!gotsig)	434	if (!gotsig)
285	{	435	{
		436	int old_errno = errno;
286	gotsig = 1;	437	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	438	write (sigpipe [1], &signum, 1);
		439	errno = old_errno;
288	}	440	}
289	}	441	}
290		442
291	static void	443	static void
292	sigcb (struct ev_io *iow, int revents)	444	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	445	{
294	struct ev_signal *w;	446	struct ev_watcher_list *w;
295	int sig;	447	int signum;
296		448
		449	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	450	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		451
300	for (sig = signalmax; sig--; )	452	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	453	if (signals [signum].gotsig)
302	{	454	{
303	signals [sig].gotsig = 0;	455	signals [signum].gotsig = 0;
304		456
305	for (w = signals [sig].head; w; w = w->next)	457	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	458	event (EV_A_ (W)w, EV_SIGNAL);
307	}	459	}
308	}	460	}
309		461
310	static void	462	static void
311	siginit (void)	463	siginit (EV_P)
312	{	464	{
		465	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		468
316	/* rather than sort out wether we really need nb, set it */	469	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		472	#endif
319		473
320	evio_set (&sigev, sigpipe [0], EV_READ);	474	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	475	ev_io_start (EV_A_ &sigev);
		476	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	477	}
323		478
324	/*****************************************************************************/	479	/*****************************************************************************/
325		480
326	static struct ev_idle **idles;	481	#ifndef WIN32
327	static int idlemax, idlecnt;
328		482
329	static struct ev_check **checks;	483	#ifndef WCONTINUED
330	static int checkmax, checkcnt;	484	# define WCONTINUED 0
		485	#endif
		486
		487	static void
		488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		489	{
		490	struct ev_child *w;
		491
		492	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		493	if (w->pid == pid \|\| !w->pid)
		494	{
		495	w->priority = sw->priority; /* need to do it now */
		496	w->rpid = pid;
		497	w->rstatus = status;
		498	event (EV_A_ (W)w, EV_CHILD);
		499	}
		500	}
		501
		502	static void
		503	childcb (EV_P_ struct ev_signal *sw, int revents)
		504	{
		505	int pid, status;
		506
		507	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		508	{
		509	/* make sure we are called again until all childs have been reaped */
		510	event (EV_A_ (W)sw, EV_SIGNAL);
		511
		512	child_reap (EV_A_ sw, pid, pid, status);
		513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		514	}
		515	}
		516
		517	#endif
331		518
332	/*****************************************************************************/	519	/*****************************************************************************/
333		520
		521	#if EV_USE_KQUEUE
		522	# include "ev_kqueue.c"
		523	#endif
334	#if HAVE_EPOLL	524	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	525	# include "ev_epoll.c"
336	#endif	526	#endif
		527	#if EV_USEV_POLL
		528	# include "ev_poll.c"
		529	#endif
337	#if HAVE_SELECT	530	#if EV_USE_SELECT
338	# include "ev_select.c"	531	# include "ev_select.c"
339	#endif	532	#endif
340		533
341	int ev_init (int flags)	534	int
		535	ev_version_major (void)
342	{	536	{
		537	return EV_VERSION_MAJOR;
		538	}
		539
		540	int
		541	ev_version_minor (void)
		542	{
		543	return EV_VERSION_MINOR;
		544	}
		545
		546	/* return true if we are running with elevated privileges and should ignore env variables */
		547	static int
		548	enable_secure (void)
		549	{
		550	#ifdef WIN32
		551	return 0;
		552	#else
		553	return getuid () != geteuid ()
		554	\|\| getgid () != getegid ();
		555	#endif
		556	}
		557
		558	int
		559	ev_method (EV_P)
		560	{
		561	return method;
		562	}
		563
		564	static void
		565	loop_init (EV_P_ int methods)
		566	{
		567	if (!method)
		568	{
343	#if HAVE_MONOTONIC	569	#if EV_USE_MONOTONIC
344	{	570	{
345	struct timespec ts;	571	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	573	have_monotonic = 1;
348	}	574	}
349	#endif	575	#endif
350		576
351	ev_now = ev_time ();	577	rt_now = ev_time ();
352	now = get_clock ();	578	mn_now = get_clock ();
353	diff = ev_now - now;	579	now_floor = mn_now;
		580	rtmn_diff = rt_now - mn_now;
354		581
		582	if (methods == EVMETHOD_AUTO)
		583	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		584	methods = atoi (getenv ("LIBEV_METHODS"));
		585	else
		586	methods = EVMETHOD_ANY;
		587
		588	method = 0;
		589	#if EV_USE_KQUEUE
		590	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		591	#endif
		592	#if EV_USE_EPOLL
		593	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		594	#endif
		595	#if EV_USEV_POLL
		596	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		597	#endif
		598	#if EV_USE_SELECT
		599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		600	#endif
		601	}
		602	}
		603
		604	void
		605	loop_destroy (EV_P)
		606	{
		607	#if EV_USE_KQUEUE
		608	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		609	#endif
		610	#if EV_USE_EPOLL
		611	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		612	#endif
		613	#if EV_USEV_POLL
		614	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		615	#endif
		616	#if EV_USE_SELECT
		617	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		618	#endif
		619
		620	method = 0;
		621	/TODO/
		622	}
		623
		624	void
		625	loop_fork (EV_P)
		626	{
		627	/TODO/
		628	#if EV_USE_EPOLL
		629	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		630	#endif
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		633	#endif
		634	}
		635
		636	#if EV_MULTIPLICITY
		637	struct ev_loop *
		638	ev_loop_new (int methods)
		639	{
		640	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		641
		642	loop_init (EV_A_ methods);
		643
		644	if (ev_methods (EV_A))
		645	return loop;
		646
		647	return 0;
		648	}
		649
		650	void
		651	ev_loop_destroy (EV_P)
		652	{
		653	loop_destroy (EV_A);
		654	free (loop);
		655	}
		656
		657	void
		658	ev_loop_fork (EV_P)
		659	{
		660	loop_fork (EV_A);
		661	}
		662
		663	#endif
		664
		665	#if EV_MULTIPLICITY
		666	struct ev_loop default_loop_struct;
		667	static struct ev_loop *default_loop;
		668
		669	struct ev_loop *
		670	#else
		671	static int default_loop;
		672
		673	int
		674	#endif
		675	ev_default_loop (int methods)
		676	{
		677	if (sigpipe [0] == sigpipe [1])
355	if (pipe (sigpipe))	678	if (pipe (sigpipe))
356	return 0;	679	return 0;
357		680
358	ev_method = EVMETHOD_NONE;	681	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	{	682	{
		683	#if EV_MULTIPLICITY
		684	struct ev_loop *loop = default_loop = &default_loop_struct;
		685	#else
		686	default_loop = 1;
		687	#endif
		688
		689	loop_init (EV_A_ methods);
		690
		691	if (ev_method (EV_A))
		692	{
368	evw_init (&sigev, sigcb);	693	ev_watcher_init (&sigev, sigcb);
		694	ev_set_priority (&sigev, EV_MAXPRI);
369	siginit ();	695	siginit (EV_A);
370	}
371		696
372	return ev_method;	697	#ifndef WIN32
373	}	698	ev_signal_init (&childev, childcb, SIGCHLD);
374		699	ev_set_priority (&childev, EV_MAXPRI);
375	/*****************************************************************************/	700	ev_signal_start (EV_A_ &childev);
376		701	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	702	#endif
		703	}
		704	else
		705	default_loop = 0;
		706	}
393		707
		708	return default_loop;
		709	}
		710
		711	void
		712	ev_default_destroy (void)
		713	{
		714	#if EV_MULTIPLICITY
		715	struct ev_loop *loop = default_loop;
		716	#endif
		717
		718	ev_ref (EV_A); /* child watcher */
		719	ev_signal_stop (EV_A_ &childev);
		720
		721	ev_ref (EV_A); /* signal watcher */
394	evio_stop (&sigev);	722	ev_io_stop (EV_A_ &sigev);
		723
		724	close (sigpipe [0]); sigpipe [0] = 0;
		725	close (sigpipe [1]); sigpipe [1] = 0;
		726
		727	loop_destroy (EV_A);
		728	}
		729
		730	void
		731	ev_default_fork (EV_P)
		732	{
		733	loop_fork (EV_A);
		734
		735	ev_io_stop (EV_A_ &sigev);
395	close (sigpipe [0]);	736	close (sigpipe [0]);
396	close (sigpipe [1]);	737	close (sigpipe [1]);
397	pipe (sigpipe);	738	pipe (sigpipe);
		739
		740	ev_ref (EV_A); /* signal watcher */
398	siginit ();	741	siginit (EV_A);
399	}	742	}
400		743
401	/*****************************************************************************/	744	/*****************************************************************************/
402		745
403	static void	746	static void
404	fd_reify (void)	747	call_pending (EV_P)
405	{	748	{
406	int i;	749	int pri;
407		750
408	for (i = 0; i < fdchangecnt; ++i)	751	for (pri = NUMPRI; pri--; )
409	{	752	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	{	753	{
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;	754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		755
436	if (p->w)	756	if (p->w)
437	{	757	{
438	p->w->pending = 0;	758	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	759	p->w->cb (EV_A_ p->w, p->events);
440	}	760	}
441	}	761	}
442	}	762	}
443		763
444	static void	764	static void
445	timers_reify ()	765	timers_reify (EV_P)
446	{	766	{
447	while (timercnt && timers [0]->at <= now)	767	while (timercnt && timers [0]->at <= mn_now)
448	{	768	{
449	struct ev_timer *w = timers [0];	769	struct ev_timer *w = timers [0];
450
451	event ((W)w, EV_TIMEOUT);
452		770
453	/* first reschedule or stop timer */	771	/* first reschedule or stop timer */
454	if (w->repeat)	772	if (w->repeat)
455	{	773	{
		774	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	775	w->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	776	downheap ((WT *)timers, timercnt, 0);
459	}	777	}
460	else	778	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		780
		781	event (EV_A_ (W)w, EV_TIMEOUT);
		782	}
		783	}
		784
465	static void	785	static void
466	periodics_reify ()	786	periodics_reify (EV_P)
467	{	787	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	788	while (periodiccnt && periodics [0]->at <= rt_now)
469	{	789	{
470	struct ev_periodic *w = periodics [0];	790	struct ev_periodic *w = periodics [0];
471		791
472	/* first reschedule or stop timer */	792	/* first reschedule or stop timer */
473	if (w->interval)	793	if (w->interval)
474	{	794	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	795	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));	796	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	797	downheap ((WT *)periodics, periodiccnt, 0);
478	}	798	}
479	else	799	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		801
482	event ((W)w, EV_TIMEOUT);	802	event (EV_A_ (W)w, EV_PERIODIC);
483	}	803	}
484	}	804	}
485		805
486	static void	806	static void
487	periodics_reschedule (ev_tstamp diff)	807	periodics_reschedule (EV_P)
488	{	808	{
489	int i;	809	int i;
490		810
491	/* adjust periodics after time jump */	811	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	812	for (i = 0; i < periodiccnt; ++i)
493	{	813	{
494	struct ev_periodic *w = periodics [i];	814	struct ev_periodic *w = periodics [i];
495		815
496	if (w->interval)	816	if (w->interval)
497	{	817	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	818	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
499		819
500	if (fabs (diff) >= 1e-4)	820	if (fabs (diff) >= 1e-4)
501	{	821	{
502	evperiodic_stop (w);	822	ev_periodic_stop (EV_A_ w);
503	evperiodic_start (w);	823	ev_periodic_start (EV_A_ w);
504		824
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
506	}	826	}
507	}	827	}
508	}	828	}
509	}	829	}
510		830
		831	inline int
		832	time_update_monotonic (EV_P)
		833	{
		834	mn_now = get_clock ();
		835
		836	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		837	{
		838	rt_now = rtmn_diff + mn_now;
		839	return 0;
		840	}
		841	else
		842	{
		843	now_floor = mn_now;
		844	rt_now = ev_time ();
		845	return 1;
		846	}
		847	}
		848
511	static void	849	static void
512	time_update ()	850	time_update (EV_P)
513	{	851	{
514	int i;	852	int i;
515		853
516	ev_now = ev_time ();	854	#if EV_USE_MONOTONIC
517
518	if (have_monotonic)	855	if (expect_true (have_monotonic))
519	{	856	{
520	ev_tstamp odiff = diff;	857	if (time_update_monotonic (EV_A))
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	858	{
524	now = get_clock ();	859	ev_tstamp odiff = rtmn_diff;
		860
		861	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		862	{
525	diff = ev_now - now;	863	rtmn_diff = rt_now - mn_now;
526		864
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)	865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
528	return; /* all is well */	866	return; /* all is well */
529		867
530	ev_now = ev_time ();	868	rt_now = ev_time ();
		869	mn_now = get_clock ();
		870	now_floor = mn_now;
		871	}
		872
		873	periodics_reschedule (EV_A);
		874	/* no timer adjustment, as the monotonic clock doesn't jump */
		875	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
531	}	876	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}	877	}
536	else	878	else
		879	#endif
537	{	880	{
538	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	881	rt_now = ev_time ();
		882
		883	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
539	{	884	{
540	periodics_reschedule (ev_now - now);	885	periodics_reschedule (EV_A);
541		886
542	/* adjust timers. this is easy, as the offset is the same for all */	887	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	888	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	889	timers [i]->at += rt_now - mn_now;
545	}	890	}
546		891
547	now = ev_now;	892	mn_now = rt_now;
548	}	893	}
549	}	894	}
550		895
551	int ev_loop_done;	896	void
		897	ev_ref (EV_P)
		898	{
		899	++activecnt;
		900	}
552		901
		902	void
		903	ev_unref (EV_P)
		904	{
		905	--activecnt;
		906	}
		907
		908	static int loop_done;
		909
		910	void
553	void ev_loop (int flags)	911	ev_loop (EV_P_ int flags)
554	{	912	{
555	double block;	913	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	914	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		915
564	do	916	do
565	{	917	{
		918	/* queue check watchers (and execute them) */
		919	if (expect_false (preparecnt))
		920	{
		921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		922	call_pending (EV_A);
		923	}
		924
566	/* update fd-related kernel structures */	925	/* update fd-related kernel structures */
567	fd_reify ();	926	fd_reify (EV_A);
568		927
569	/* calculate blocking time */	928	/* calculate blocking time */
570		929
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	930	/* we only need this for !monotonic clockor timers, but as we basically
		931	always have timers, we just calculate it always */
		932	#if EV_USE_MONOTONIC
		933	if (expect_true (have_monotonic))
		934	time_update_monotonic (EV_A);
		935	else
		936	#endif
		937	{
572	ev_now = ev_time ();	938	rt_now = ev_time ();
		939	mn_now = rt_now;
		940	}
573		941
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	942	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	943	block = 0.;
576	else	944	else
577	{	945	{
578	block = MAX_BLOCKTIME;	946	block = MAX_BLOCKTIME;
579		947
580	if (timercnt)	948	if (timercnt)
581	{	949	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	950	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
583	if (block > to) block = to;	951	if (block > to) block = to;
584	}	952	}
585		953
586	if (periodiccnt)	954	if (periodiccnt)
587	{	955	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
589	if (block > to) block = to;	957	if (block > to) block = to;
590	}	958	}
591		959
592	if (block < 0.) block = 0.;	960	if (block < 0.) block = 0.;
593	}	961	}
594		962
595	method_poll (block);	963	method_poll (EV_A_ block);
596		964
597	/* update ev_now, do magic */	965	/* update rt_now, do magic */
598	time_update ();	966	time_update (EV_A);
599		967
600	/* queue pending timers and reschedule them */	968	/* queue pending timers and reschedule them */
		969	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	970	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		971
604	/* queue idle watchers unless io or timers are pending */	972	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	973	if (!pendingcnt)
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		975
608	/* queue check and possibly idle watchers */	976	/* queue check watchers, to be executed first */
		977	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		979
611	call_pending ();	980	call_pending (EV_A);
612	}	981	}
613	while (!ev_loop_done);	982	while (activecnt && !loop_done);
614		983
615	if (ev_loop_done != 2)	984	if (loop_done != 2)
616	ev_loop_done = 0;	985	loop_done = 0;
		986	}
		987
		988	void
		989	ev_unloop (EV_P_ int how)
		990	{
		991	loop_done = how;
617	}	992	}
618		993
619	/*****************************************************************************/	994	/*****************************************************************************/
620		995
621	static void	996	inline void
622	wlist_add (WL *head, WL elem)	997	wlist_add (WL *head, WL elem)
623	{	998	{
624	elem->next = *head;	999	elem->next = *head;
625	*head = elem;	1000	*head = elem;
626	}	1001	}
627		1002
628	static void	1003	inline void
629	wlist_del (WL *head, WL elem)	1004	wlist_del (WL *head, WL elem)
630	{	1005	{
631	while (*head)	1006	while (*head)
632	{	1007	{
633	if (*head == elem)	1008	if (*head == elem)
…		…
638		1013
639	head = &(*head)->next;	1014	head = &(*head)->next;
640	}	1015	}
641	}	1016	}
642		1017
643	static void	1018	inline void
644	ev_clear (W w)	1019	ev_clear_pending (EV_P_ W w)
645	{	1020	{
646	if (w->pending)	1021	if (w->pending)
647	{	1022	{
648	pendings [w->pending - 1].w = 0;	1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1024	w->pending = 0;
650	}	1025	}
651	}	1026	}
652		1027
653	static void	1028	inline void
654	ev_start (W w, int active)	1029	ev_start (EV_P_ W w, int active)
655	{	1030	{
		1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1033
656	w->active = active;	1034	w->active = active;
		1035	ev_ref (EV_A);
657	}	1036	}
658		1037
659	static void	1038	inline void
660	ev_stop (W w)	1039	ev_stop (EV_P_ W w)
661	{	1040	{
		1041	ev_unref (EV_A);
662	w->active = 0;	1042	w->active = 0;
663	}	1043	}
664		1044
665	/*****************************************************************************/	1045	/*****************************************************************************/
666		1046
667	void	1047	void
668	evio_start (struct ev_io *w)	1048	ev_io_start (EV_P_ struct ev_io *w)
669	{	1049	{
		1050	int fd = w->fd;
		1051
670	if (ev_is_active (w))	1052	if (ev_is_active (w))
671	return;	1053	return;
672		1054
673	int fd = w->fd;	1055	assert (("ev_io_start called with negative fd", fd >= 0));
674		1056
675	ev_start ((W)w, 1);	1057	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1060
679	++fdchangecnt;	1061	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1062	}
683		1063
684	void	1064	void
685	evio_stop (struct ev_io *w)	1065	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1066	{
687	ev_clear ((W)w);	1067	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1068	if (!ev_is_active (w))
689	return;	1069	return;
690		1070
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1072	ev_stop (EV_A_ (W)w);
693		1073
694	++fdchangecnt;	1074	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1075	}
698		1076
699	void	1077	void
700	evtimer_start (struct ev_timer *w)	1078	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1079	{
702	if (ev_is_active (w))	1080	if (ev_is_active (w))
703	return;	1081	return;
704		1082
705	w->at += now;	1083	w->at += mn_now;
706		1084
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1085	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1086
709	ev_start ((W)w, ++timercnt);	1087	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1088	array_needsize (timers, timermax, timercnt, );
711	timers [timercnt - 1] = w;	1089	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1090	upheap ((WT *)timers, timercnt - 1);
713	}	1091	}
714		1092
715	void	1093	void
716	evtimer_stop (struct ev_timer *w)	1094	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1095	{
718	ev_clear ((W)w);	1096	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1097	if (!ev_is_active (w))
720	return;	1098	return;
721		1099
722	if (w->active < timercnt--)	1100	if (w->active < timercnt--)
723	{	1101	{
…		…
725	downheap ((WT *)timers, timercnt, w->active - 1);	1103	downheap ((WT *)timers, timercnt, w->active - 1);
726	}	1104	}
727		1105
728	w->at = w->repeat;	1106	w->at = w->repeat;
729		1107
730	ev_stop ((W)w);	1108	ev_stop (EV_A_ (W)w);
731	}	1109	}
732		1110
733	void	1111	void
734	evtimer_again (struct ev_timer *w)	1112	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1113	{
736	if (ev_is_active (w))	1114	if (ev_is_active (w))
737	{	1115	{
738	if (w->repeat)	1116	if (w->repeat)
739	{	1117	{
740	w->at = now + w->repeat;	1118	w->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1119	downheap ((WT *)timers, timercnt, w->active - 1);
742	}	1120	}
743	else	1121	else
744	evtimer_stop (w);	1122	ev_timer_stop (EV_A_ w);
745	}	1123	}
746	else if (w->repeat)	1124	else if (w->repeat)
747	evtimer_start (w);	1125	ev_timer_start (EV_A_ w);
748	}	1126	}
749		1127
750	void	1128	void
751	evperiodic_start (struct ev_periodic *w)	1129	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1130	{
753	if (ev_is_active (w))	1131	if (ev_is_active (w))
754	return;	1132	return;
755		1133
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1134	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
757		1135
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1136	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)	1137	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
761		1139
762	ev_start ((W)w, ++periodiccnt);	1140	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1141	array_needsize (periodics, periodicmax, periodiccnt, );
764	periodics [periodiccnt - 1] = w;	1142	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1143	upheap ((WT *)periodics, periodiccnt - 1);
766	}	1144	}
767		1145
768	void	1146	void
769	evperiodic_stop (struct ev_periodic *w)	1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1148	{
771	ev_clear ((W)w);	1149	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1150	if (!ev_is_active (w))
773	return;	1151	return;
774		1152
775	if (w->active < periodiccnt--)	1153	if (w->active < periodiccnt--)
776	{	1154	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1155	periodics [w->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);
779	}	1157	}
780		1158
781	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
782	}	1160	}
783		1161
784	void	1162	void
785	evsignal_start (struct ev_signal *w)	1163	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1164	{
787	if (ev_is_active (w))	1165	if (ev_is_active (w))
788	return;	1166	return;
789		1167
		1168	ev_start (EV_A_ (W)w, ++idlecnt);
		1169	array_needsize (idles, idlemax, idlecnt, );
		1170	idles [idlecnt - 1] = w;
		1171	}
		1172
		1173	void
		1174	ev_idle_stop (EV_P_ struct ev_idle *w)
		1175	{
		1176	ev_clear_pending (EV_A_ (W)w);
		1177	if (ev_is_active (w))
		1178	return;
		1179
		1180	idles [w->active - 1] = idles [--idlecnt];
		1181	ev_stop (EV_A_ (W)w);
		1182	}
		1183
		1184	void
		1185	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1186	{
		1187	if (ev_is_active (w))
		1188	return;
		1189
		1190	ev_start (EV_A_ (W)w, ++preparecnt);
		1191	array_needsize (prepares, preparemax, preparecnt, );
		1192	prepares [preparecnt - 1] = w;
		1193	}
		1194
		1195	void
		1196	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1197	{
		1198	ev_clear_pending (EV_A_ (W)w);
		1199	if (ev_is_active (w))
		1200	return;
		1201
		1202	prepares [w->active - 1] = prepares [--preparecnt];
		1203	ev_stop (EV_A_ (W)w);
		1204	}
		1205
		1206	void
		1207	ev_check_start (EV_P_ struct ev_check *w)
		1208	{
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	ev_start (EV_A_ (W)w, ++checkcnt);
		1213	array_needsize (checks, checkmax, checkcnt, );
		1214	checks [checkcnt - 1] = w;
		1215	}
		1216
		1217	void
		1218	ev_check_stop (EV_P_ struct ev_check *w)
		1219	{
		1220	ev_clear_pending (EV_A_ (W)w);
		1221	if (ev_is_active (w))
		1222	return;
		1223
		1224	checks [w->active - 1] = checks [--checkcnt];
		1225	ev_stop (EV_A_ (W)w);
		1226	}
		1227
		1228	#ifndef SA_RESTART
		1229	# define SA_RESTART 0
		1230	#endif
		1231
		1232	void
		1233	ev_signal_start (EV_P_ struct ev_signal *w)
		1234	{
		1235	#if EV_MULTIPLICITY
		1236	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1237	#endif
		1238	if (ev_is_active (w))
		1239	return;
		1240
		1241	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1242
790	ev_start ((W)w, 1);	1243	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1244	array_needsize (signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1246
794	if (!w->next)	1247	if (!w->next)
795	{	1248	{
796	struct sigaction sa;	1249	struct sigaction sa;
797	sa.sa_handler = sighandler;	1250	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1251	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1253	sigaction (w->signum, &sa, 0);
801	}	1254	}
802	}	1255	}
803		1256
804	void	1257	void
805	evsignal_stop (struct ev_signal *w)	1258	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1259	{
807	ev_clear ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
809	return;	1262	return;
810		1263
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1265	ev_stop (EV_A_ (W)w);
813		1266
814	if (!signals [w->signum - 1].head)	1267	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1268	signal (w->signum, SIG_DFL);
816	}	1269	}
817		1270
818	void evidle_start (struct ev_idle *w)	1271	void
		1272	ev_child_start (EV_P_ struct ev_child *w)
819	{	1273	{
		1274	#if EV_MULTIPLICITY
		1275	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1276	#endif
820	if (ev_is_active (w))	1277	if (ev_is_active (w))
821	return;	1278	return;
822		1279
823	ev_start ((W)w, ++idlecnt);	1280	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1282	}
827		1283
828	void evidle_stop (struct ev_idle *w)	1284	void
		1285	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1286	{
830	ev_clear ((W)w);	1287	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1288	if (ev_is_active (w))
832	return;	1289	return;
833		1290
834	idles [w->active - 1] = idles [--idlecnt];	1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1292	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	}	1293	}
857		1294
858	/*****************************************************************************/	1295	/*****************************************************************************/
859		1296
860	struct ev_once	1297	struct ev_once
…		…
864	void (cb)(int revents, void arg);	1301	void (cb)(int revents, void arg);
865	void *arg;	1302	void *arg;
866	};	1303	};
867		1304
868	static void	1305	static void
869	once_cb (struct ev_once *once, int revents)	1306	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1307	{
871	void (cb)(int revents, void arg) = once->cb;	1308	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	1309	void *arg = once->arg;
873		1310
874	evio_stop (&once->io);	1311	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1312	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1313	free (once);
877		1314
878	cb (revents, arg);	1315	cb (revents, arg);
879	}	1316	}
880		1317
881	static void	1318	static void
882	once_cb_io (struct ev_io *w, int revents)	1319	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1320	{
884	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1321	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
885	}	1322	}
886		1323
887	static void	1324	static void
888	once_cb_to (struct ev_timer *w, int revents)	1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1326	{
890	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1327	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
891	}	1328	}
892		1329
893	void	1330	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1331	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
895	{	1332	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1333	struct ev_once *once = malloc (sizeof (struct ev_once));
897		1334
898	if (!once)	1335	if (!once)
899	cb (EV_ERROR, arg);	1336	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
900	else	1337	else
901	{	1338	{
902	once->cb = cb;	1339	once->cb = cb;
903	once->arg = arg;	1340	once->arg = arg;
904		1341
905	evw_init (&once->io, once_cb_io);	1342	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1343	if (fd >= 0)
908	{	1344	{
909	evio_set (&once->io, fd, events);	1345	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1346	ev_io_start (EV_A_ &once->io);
911	}	1347	}
912		1348
913	evw_init (&once->to, once_cb_to);	1349	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1350	if (timeout >= 0.)
916	{	1351	{
917	evtimer_set (&once->to, timeout, 0.);	1352	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1353	ev_timer_start (EV_A_ &once->to);
919	}	1354	}
920	}	1355	}
921	}	1356	}
922		1357
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 1.58 by root, Sun Nov 4 16:52:52 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 1.58 by root, Sun Nov 4 16:52:52 2007 UTC