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Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (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
29	* 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.
30	*/	30	*/
31	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
32	# include "config.h"	32	# include "config.h"
33	#endif	33	#endif
34		34
35	#include <math.h>	35	#include <math.h>
36	#include <stdlib.h>	36	#include <stdlib.h>
…		…
42	#include <stdio.h>	42	#include <stdio.h>
43		43
44	#include <assert.h>	44	#include <assert.h>
45	#include <errno.h>	45	#include <errno.h>
46	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
47	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
48	#include <sys/time.h>	50	#include <sys/time.h>
49	#include <time.h>	51	#include <time.h>
50		52
		53	/**/
		54
51	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
54	# endif
55	#endif	57	#endif
56		58
57	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
59	#endif	61	#endif
60		62
		63	#ifndef EV_USE_POLL
		64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
61	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
63	#endif	69	#endif
64		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
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
65	#ifndef CLOCK_REALTIME	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	88	# define EV_USE_REALTIME 0
67	#endif	89	#endif
68	#ifndef EV_USE_REALTIME	90
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	91	/**/
70	#endif
71		92
72	#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) */
73	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
74	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
75	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
76		97
77	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
78		113
79	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
82		117
83	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
84	ev_tstamp ev_now;
85	int ev_method;
86
87	static int have_monotonic; /* runtime */
88
89	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
90	static void (*method_modify)(int fd, int oev, int nev);
91	static void (*method_poll)(ev_tstamp timeout);
92		119
93	/*****************************************************************************/	120	/*****************************************************************************/
94		121
95	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
96	ev_time (void)	156	ev_time (void)
97	{	157	{
98	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
99	struct timespec ts;	159	struct timespec ts;
100	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
104	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	166	#endif
107	}	167	}
108		168
109	static ev_tstamp	169	inline ev_tstamp
110	get_clock (void)	170	get_clock (void)
111	{	171	{
112	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
113	if (have_monotonic)	173	if (expect_true (have_monotonic))
114	{	174	{
115	struct timespec ts;	175	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	178	}
119	#endif	179	#endif
120		180
121	return ev_time ();	181	return ev_time ();
122	}	182	}
123		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
124	#define array_roundsize(base,n) ((n) | 4 & ~3)	190	#define array_roundsize(base,n) ((n) | 4 & ~3)
125		191
126	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
127	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
128	{ \	194	{ \
129	int newcnt = cur; \	195	int newcnt = cur; \
130	do \	196	do \
131	{ \	197	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
138	cur = newcnt; \	204	cur = newcnt; \
139	}	205	}
140		206
141	/*****************************************************************************/	207	/*****************************************************************************/
142		208
143	typedef struct
144	{
145	struct ev_io *head;
146	unsigned char events;
147	unsigned char reify;
148	} ANFD;
149
150	static ANFD *anfds;
151	static int anfdmax;
152
153	static void	209	static void
154	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
155	{	211	{
156	while (count--)	212	while (count--)
157	{	213	{
…		…
161		217
162	++base;	218	++base;
163	}	219	}
164	}	220	}
165		221
166	typedef struct
167	{
168	W w;
169	int events;
170	} ANPENDING;
171
172	static ANPENDING *pendings;
173	static int pendingmax, pendingcnt;
174
175	static void	222	static void
176	event (W w, int events)	223	event (EV_P_ W w, int events)
177	{	224	{
178	if (w->pending)	225	if (w->pending)
179	{	226	{
180	pendings [w->pending - 1].events |= events;	227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
181	return;	228	return;
182	}	229	}
183		230
184	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
186	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
187	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
188	}	235	}
189		236
190	static void	237	static void
191	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	239	{
193	int i;	240	int i;
194		241
195	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	243	event (EV_A_ events [i], type);
197	}	244	}
198		245
199	static void	246	static void
200	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
201	{	248	{
202	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	250	struct ev_io *w;
204		251
205	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
206	{	253	{
207	int ev = w->events & events;	254	int ev = w->events & events;
208		255
209	if (ev)	256	if (ev)
210	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
211	}	258	}
212	}	259	}
213		260
214	/*****************************************************************************/	261	/*****************************************************************************/
215		262
216	static int *fdchanges;
217	static int fdchangemax, fdchangecnt;
218
219	static void	263	static void
220	fd_reify (void)	264	fd_reify (EV_P)
221	{	265	{
222	int i;	266	int i;
223		267
224	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
225	{	269	{
…		…
227	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	272	struct ev_io *w;
229		273
230	int events = 0;	274	int events = 0;
231		275
232	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
233	events |= w->events;	277	events |= w->events;
234		278
235	anfd->reify = 0;	279	anfd->reify = 0;
236		280
237	if (anfd->events != events)	281	if (anfd->events != events)
238	{	282	{
239	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	284	anfd->events = events;
241	}	285	}
242	}	286	}
243		287
244	fdchangecnt = 0;	288	fdchangecnt = 0;
245	}	289	}
246		290
247	static void	291	static void
248	fd_change (int fd)	292	fd_change (EV_P_ int fd)
249	{	293	{
250	if (anfds [fd].reify || fdchangecnt < 0)	294	if (anfds [fd].reify || fdchangecnt < 0)
251	return;	295	return;
252		296
253	anfds [fd].reify = 1;	297	anfds [fd].reify = 1;
…		…
255	++fdchangecnt;	299	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
257	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
258	}	302	}
259		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		313	}
		314	}
		315
260	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
261	static void	317	static void
262	fd_recheck (void)	318	fd_ebadf (EV_P)
263	{	319	{
264	int fd;	320	int fd;
265		321
266	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	323	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
269	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
270	{	336	{
271	ev_io_stop (anfds [fd].head);	337	close (fd);
272	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	338	fd_kill (EV_A_ fd);
		339	return;
273	}	340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
274	}	356	}
275		357
276	/*****************************************************************************/	358	/*****************************************************************************/
277		359
278	static struct ev_timer **timers;
279	static int timermax, timercnt;
280
281	static struct ev_periodic **periodics;
282	static int periodicmax, periodiccnt;
283
284	static void	360	static void
285	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
286	{	362	{
287	WT w = timers [k];	363	WT w = heap [k];
288		364
289	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
290	{	366	{
291	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
293	k >>= 1;	369	k >>= 1;
294	}	370	}
295		371
296	timers [k] = w;	372	heap [k] = w;
297	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
298		374
299	}	375	}
300		376
301	static void	377	static void
302	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
303	{	379	{
304	WT w = timers [k];	380	WT w = heap [k];
305		381
306	while (k < (N >> 1))	382	while (k < (N >> 1))
307	{	383	{
308	int j = k << 1;	384	int j = k << 1;
309		385
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	387	++j;
312		388
313	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
314	break;	390	break;
315		391
316	timers [k] = timers [j];	392	heap [k] = heap [j];
317	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
318	k = j;	394	k = j;
319	}	395	}
320		396
321	timers [k] = w;	397	heap [k] = w;
322	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
323	}	399	}
324		400
325	/*****************************************************************************/	401	/*****************************************************************************/
326		402
327	typedef struct	403	typedef struct
328	{	404	{
329	struct ev_signal *head;	405	struct ev_watcher_list *head;
330	sig_atomic_t volatile gotsig;	406	sig_atomic_t volatile gotsig;
331	} ANSIG;	407	} ANSIG;
332		408
333	static ANSIG *signals;	409	static ANSIG *signals;
334	static int signalmax;	410	static int signalmax;
…		…
354	{	430	{
355	signals [signum - 1].gotsig = 1;	431	signals [signum - 1].gotsig = 1;
356		432
357	if (!gotsig)	433	if (!gotsig)
358	{	434	{
		435	int old_errno = errno;
359	gotsig = 1;	436	gotsig = 1;
360	write (sigpipe [1], &signum, 1);	437	write (sigpipe [1], &signum, 1);
		438	errno = old_errno;
361	}	439	}
362	}	440	}
363		441
364	static void	442	static void
365	sigcb (struct ev_io *iow, int revents)	443	sigcb (EV_P_ struct ev_io *iow, int revents)
366	{	444	{
367	struct ev_signal *w;	445	struct ev_watcher_list *w;
368	int sig;	446	int signum;
369		447
370	read (sigpipe [0], &revents, 1);	448	read (sigpipe [0], &revents, 1);
371	gotsig = 0;	449	gotsig = 0;
372		450
373	for (sig = signalmax; sig--; )	451	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	452	if (signals [signum].gotsig)
375	{	453	{
376	signals [sig].gotsig = 0;	454	signals [signum].gotsig = 0;
377		455
378	for (w = signals [sig].head; w; w = w->next)	456	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	457	event (EV_A_ (W)w, EV_SIGNAL);
380	}	458	}
381	}	459	}
382		460
383	static void	461	static void
384	siginit (void)	462	siginit (EV_P)
385	{	463	{
		464	#ifndef WIN32
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388		467
389	/* rather than sort out wether we really need nb, set it */	468	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		471	#endif
392		472
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	473	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	474	ev_io_start (EV_A_ &sigev);
		475	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	476	}
396		477
397	/*****************************************************************************/	478	/*****************************************************************************/
398		479
399	static struct ev_idle **idles;	480	#ifndef WIN32
400	static int idlemax, idlecnt;
401
402	static struct ev_prepare **prepares;
403	static int preparemax, preparecnt;
404
405	static struct ev_check **checks;
406	static int checkmax, checkcnt;
407
408	/*****************************************************************************/
409		481
410	static struct ev_child *childs [PID_HASHSIZE];	482	static struct ev_child *childs [PID_HASHSIZE];
411	static struct ev_signal childev;	483	static struct ev_signal childev;
412		484
413	#ifndef WCONTINUED	485	#ifndef WCONTINUED
414	# define WCONTINUED 0	486	# define WCONTINUED 0
415	#endif	487	#endif
416		488
417	static void	489	static void
418	childcb (struct ev_signal *sw, int revents)	490	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
419	{	491	{
420	struct ev_child *w;	492	struct ev_child *w;
		493
		494	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		495	if (w->pid == pid || !w->pid)
		496	{
		497	w->priority = sw->priority; /* need to do it *now* */
		498	w->rpid = pid;
		499	w->rstatus = status;
		500	event (EV_A_ (W)w, EV_CHILD);
		501	}
		502	}
		503
		504	static void
		505	childcb (EV_P_ struct ev_signal *sw, int revents)
		506	{
421	int pid, status;	507	int pid, status;
422		508
423	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	509	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	510	{
425	if (w->pid == pid || w->pid == -1)	511	/* make sure we are called again until all childs have been reaped */
426	{	512	event (EV_A_ (W)sw, EV_SIGNAL);
427	w->status = status;	513
428	event ((W)w, EV_CHILD);	514	child_reap (EV_A_ sw, pid, pid, status);
429	}	515	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		516	}
430	}	517	}
		518
		519	#endif
431		520
432	/*****************************************************************************/	521	/*****************************************************************************/
433		522
		523	#if EV_USE_KQUEUE
		524	# include "ev_kqueue.c"
		525	#endif
434	#if EV_USE_EPOLL	526	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	527	# include "ev_epoll.c"
436	#endif	528	#endif
		529	#if EV_USE_POLL
		530	# include "ev_poll.c"
		531	#endif
437	#if EV_USE_SELECT	532	#if EV_USE_SELECT
438	# include "ev_select.c"	533	# include "ev_select.c"
439	#endif	534	#endif
440		535
441	int	536	int
…		…
448	ev_version_minor (void)	543	ev_version_minor (void)
449	{	544	{
450	return EV_VERSION_MINOR;	545	return EV_VERSION_MINOR;
451	}	546	}
452		547
453	int ev_init (int flags)	548	/* return true if we are running with elevated privileges and should ignore env variables */
		549	static int
		550	enable_secure (void)
454	{	551	{
		552	#ifdef WIN32
		553	return 0;
		554	#else
		555	return getuid () != geteuid ()
		556	|| getgid () != getegid ();
		557	#endif
		558	}
		559
		560	int
		561	ev_method (EV_P)
		562	{
		563	return method;
		564	}
		565
		566	static void
		567	loop_init (EV_P_ int methods)
		568	{
455	if (!ev_method)	569	if (!method)
456	{	570	{
457	#if EV_USE_MONOTONIC	571	#if EV_USE_MONOTONIC
458	{	572	{
459	struct timespec ts;	573	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	575	have_monotonic = 1;
462	}	576	}
463	#endif	577	#endif
464		578
465	ev_now = ev_time ();	579	rt_now = ev_time ();
466	now = get_clock ();	580	mn_now = get_clock ();
		581	now_floor = mn_now;
467	diff = ev_now - now;	582	rtmn_diff = rt_now - mn_now;
468		583
469	if (pipe (sigpipe))	584	if (methods == EVMETHOD_AUTO)
470	return 0;	585	if (!enable_secure () && getenv ("LIBEV_METHODS"))
471		586	methods = atoi (getenv ("LIBEV_METHODS"));
		587	else
472	ev_method = EVMETHOD_NONE;	588	methods = EVMETHOD_ANY;
		589
		590	method = 0;
		591	#if EV_USE_KQUEUE
		592	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		593	#endif
473	#if EV_USE_EPOLL	594	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	595	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		596	#endif
		597	#if EV_USE_POLL
		598	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
475	#endif	599	#endif
476	#if EV_USE_SELECT	600	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	601	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
478	#endif	602	#endif
		603	}
		604	}
479		605
		606	void
		607	loop_destroy (EV_P)
		608	{
		609	#if EV_USE_KQUEUE
		610	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		611	#endif
		612	#if EV_USE_EPOLL
		613	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		614	#endif
		615	#if EV_USE_POLL
		616	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		617	#endif
		618	#if EV_USE_SELECT
		619	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		620	#endif
		621
		622	method = 0;
		623	/*TODO*/
		624	}
		625
		626	void
		627	loop_fork (EV_P)
		628	{
		629	/*TODO*/
		630	#if EV_USE_EPOLL
		631	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		632	#endif
		633	#if EV_USE_KQUEUE
		634	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		635	#endif
		636	}
		637
		638	#if EV_MULTIPLICITY
		639	struct ev_loop *
		640	ev_loop_new (int methods)
		641	{
		642	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		643
		644	loop_init (EV_A_ methods);
		645
		646	if (ev_methods (EV_A))
		647	return loop;
		648
		649	return 0;
		650	}
		651
		652	void
		653	ev_loop_destroy (EV_P)
		654	{
		655	loop_destroy (EV_A);
		656	free (loop);
		657	}
		658
		659	void
		660	ev_loop_fork (EV_P)
		661	{
		662	loop_fork (EV_A);
		663	}
		664
		665	#endif
		666
		667	#if EV_MULTIPLICITY
		668	struct ev_loop default_loop_struct;
		669	static struct ev_loop *default_loop;
		670
		671	struct ev_loop *
		672	#else
		673	static int default_loop;
		674
		675	int
		676	#endif
		677	ev_default_loop (int methods)
		678	{
		679	if (sigpipe [0] == sigpipe [1])
		680	if (pipe (sigpipe))
		681	return 0;
		682
		683	if (!default_loop)
		684	{
		685	#if EV_MULTIPLICITY
		686	struct ev_loop *loop = default_loop = &default_loop_struct;
		687	#else
		688	default_loop = 1;
		689	#endif
		690
		691	loop_init (EV_A_ methods);
		692
480	if (ev_method)	693	if (ev_method (EV_A))
481	{	694	{
482	ev_watcher_init (&sigev, sigcb);	695	ev_watcher_init (&sigev, sigcb);
		696	ev_set_priority (&sigev, EV_MAXPRI);
483	siginit ();	697	siginit (EV_A);
484		698
		699	#ifndef WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	700	ev_signal_init (&childev, childcb, SIGCHLD);
		701	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	702	ev_signal_start (EV_A_ &childev);
		703	ev_unref (EV_A); /* child watcher should not keep loop alive */
		704	#endif
487	}	705	}
		706	else
		707	default_loop = 0;
488	}	708	}
489		709
490	return ev_method;	710	return default_loop;
491	}	711	}
492		712
493	/*****************************************************************************/
494
495	void	713	void
496	ev_fork_prepare (void)	714	ev_default_destroy (void)
497	{	715	{
498	/* nop */	716	#if EV_MULTIPLICITY
499	}	717	struct ev_loop *loop = default_loop;
500
501	void
502	ev_fork_parent (void)
503	{
504	/* nop */
505	}
506
507	void
508	ev_fork_child (void)
509	{
510	#if EV_USE_EPOLL
511	if (ev_method == EVMETHOD_EPOLL)
512	epoll_postfork_child ();
513	#endif	718	#endif
514		719
		720	ev_ref (EV_A); /* child watcher */
		721	ev_signal_stop (EV_A_ &childev);
		722
		723	ev_ref (EV_A); /* signal watcher */
515	ev_io_stop (&sigev);	724	ev_io_stop (EV_A_ &sigev);
		725
		726	close (sigpipe [0]); sigpipe [0] = 0;
		727	close (sigpipe [1]); sigpipe [1] = 0;
		728
		729	loop_destroy (EV_A);
		730	}
		731
		732	void
		733	ev_default_fork (EV_P)
		734	{
		735	loop_fork (EV_A);
		736
		737	ev_io_stop (EV_A_ &sigev);
516	close (sigpipe [0]);	738	close (sigpipe [0]);
517	close (sigpipe [1]);	739	close (sigpipe [1]);
518	pipe (sigpipe);	740	pipe (sigpipe);
		741
		742	ev_ref (EV_A); /* signal watcher */
519	siginit ();	743	siginit (EV_A);
520	}	744	}
521		745
522	/*****************************************************************************/	746	/*****************************************************************************/
523		747
524	static void	748	static void
525	call_pending (void)	749	call_pending (EV_P)
526	{	750	{
		751	int pri;
		752
		753	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	754	while (pendingcnt [pri])
528	{	755	{
529	ANPENDING *p = pendings + --pendingcnt;	756	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		757
531	if (p->w)	758	if (p->w)
532	{	759	{
533	p->w->pending = 0;	760	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	761	p->w->cb (EV_A_ p->w, p->events);
535	}	762	}
536	}	763	}
537	}	764	}
538		765
539	static void	766	static void
540	timers_reify (void)	767	timers_reify (EV_P)
541	{	768	{
542	while (timercnt && timers [0]->at <= now)	769	while (timercnt && timers [0]->at <= mn_now)
543	{	770	{
544	struct ev_timer *w = timers [0];	771	struct ev_timer *w = timers [0];
545		772
546	/* first reschedule or stop timer */	773	/* first reschedule or stop timer */
547	if (w->repeat)	774	if (w->repeat)
548	{	775	{
549	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	776	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
550	w->at = now + w->repeat;	777	w->at = mn_now + w->repeat;
551	downheap ((WT *)timers, timercnt, 0);	778	downheap ((WT *)timers, timercnt, 0);
552	}	779	}
553	else	780	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	781	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		782
556	event ((W)w, EV_TIMEOUT);	783	event (EV_A_ (W)w, EV_TIMEOUT);
557	}	784	}
558	}	785	}
559		786
560	static void	787	static void
561	periodics_reify (void)	788	periodics_reify (EV_P)
562	{	789	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	790	while (periodiccnt && periodics [0]->at <= rt_now)
564	{	791	{
565	struct ev_periodic *w = periodics [0];	792	struct ev_periodic *w = periodics [0];
566		793
567	/* first reschedule or stop timer */	794	/* first reschedule or stop timer */
568	if (w->interval)	795	if (w->interval)
569	{	796	{
570	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	797	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
571	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	798	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
572	downheap ((WT *)periodics, periodiccnt, 0);	799	downheap ((WT *)periodics, periodiccnt, 0);
573	}	800	}
574	else	801	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	802	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		803
577	event ((W)w, EV_PERIODIC);	804	event (EV_A_ (W)w, EV_PERIODIC);
578	}	805	}
579	}	806	}
580		807
581	static void	808	static void
582	periodics_reschedule (ev_tstamp diff)	809	periodics_reschedule (EV_P)
583	{	810	{
584	int i;	811	int i;
585		812
586	/* adjust periodics after time jump */	813	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	814	for (i = 0; i < periodiccnt; ++i)
588	{	815	{
589	struct ev_periodic *w = periodics [i];	816	struct ev_periodic *w = periodics [i];
590		817
591	if (w->interval)	818	if (w->interval)
592	{	819	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	820	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
594		821
595	if (fabs (diff) >= 1e-4)	822	if (fabs (diff) >= 1e-4)
596	{	823	{
597	ev_periodic_stop (w);	824	ev_periodic_stop (EV_A_ w);
598	ev_periodic_start (w);	825	ev_periodic_start (EV_A_ w);
599		826
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	827	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	828	}
602	}	829	}
603	}	830	}
604	}	831	}
605		832
		833	inline int
		834	time_update_monotonic (EV_P)
		835	{
		836	mn_now = get_clock ();
		837
		838	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		839	{
		840	rt_now = rtmn_diff + mn_now;
		841	return 0;
		842	}
		843	else
		844	{
		845	now_floor = mn_now;
		846	rt_now = ev_time ();
		847	return 1;
		848	}
		849	}
		850
606	static void	851	static void
607	time_update (void)	852	time_update (EV_P)
608	{	853	{
609	int i;	854	int i;
610		855
611	ev_now = ev_time ();	856	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	857	if (expect_true (have_monotonic))
614	{	858	{
615	ev_tstamp odiff = diff;	859	if (time_update_monotonic (EV_A))
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	860	{
619	now = get_clock ();	861	ev_tstamp odiff = rtmn_diff;
		862
		863	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		864	{
620	diff = ev_now - now;	865	rtmn_diff = rt_now - mn_now;
621		866
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	867	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	868	return; /* all is well */
624		869
625	ev_now = ev_time ();	870	rt_now = ev_time ();
		871	mn_now = get_clock ();
		872	now_floor = mn_now;
		873	}
		874
		875	periodics_reschedule (EV_A);
		876	/* no timer adjustment, as the monotonic clock doesn't jump */
		877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
626	}	878	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}	879	}
631	else	880	else
		881	#endif
632	{	882	{
633	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	883	rt_now = ev_time ();
		884
		885	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
634	{	886	{
635	periodics_reschedule (ev_now - now);	887	periodics_reschedule (EV_A);
636		888
637	/* adjust timers. this is easy, as the offset is the same for all */	889	/* adjust timers. this is easy, as the offset is the same for all */
638	for (i = 0; i < timercnt; ++i)	890	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	891	timers [i]->at += rt_now - mn_now;
640	}	892	}
641		893
642	now = ev_now;	894	mn_now = rt_now;
643	}	895	}
644	}	896	}
645		897
646	int ev_loop_done;	898	void
		899	ev_ref (EV_P)
		900	{
		901	++activecnt;
		902	}
647		903
		904	void
		905	ev_unref (EV_P)
		906	{
		907	--activecnt;
		908	}
		909
		910	static int loop_done;
		911
		912	void
648	void ev_loop (int flags)	913	ev_loop (EV_P_ int flags)
649	{	914	{
650	double block;	915	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	916	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
652		917
653	do	918	do
654	{	919	{
655	/* queue check watchers (and execute them) */	920	/* queue check watchers (and execute them) */
656	if (preparecnt)	921	if (expect_false (preparecnt))
657	{	922	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	923	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	924	call_pending (EV_A);
660	}	925	}
661		926
662	/* update fd-related kernel structures */	927	/* update fd-related kernel structures */
663	fd_reify ();	928	fd_reify (EV_A);
664		929
665	/* calculate blocking time */	930	/* calculate blocking time */
666		931
667	/* we only need this for !monotonic clockor timers, but as we basically	932	/* we only need this for !monotonic clockor timers, but as we basically
668	always have timers, we just calculate it always */	933	always have timers, we just calculate it always */
		934	#if EV_USE_MONOTONIC
		935	if (expect_true (have_monotonic))
		936	time_update_monotonic (EV_A);
		937	else
		938	#endif
		939	{
669	ev_now = ev_time ();	940	rt_now = ev_time ();
		941	mn_now = rt_now;
		942	}
670		943
671	if (flags & EVLOOP_NONBLOCK || idlecnt)	944	if (flags & EVLOOP_NONBLOCK || idlecnt)
672	block = 0.;	945	block = 0.;
673	else	946	else
674	{	947	{
675	block = MAX_BLOCKTIME;	948	block = MAX_BLOCKTIME;
676		949
677	if (timercnt)	950	if (timercnt)
678	{	951	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	952	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
680	if (block > to) block = to;	953	if (block > to) block = to;
681	}	954	}
682		955
683	if (periodiccnt)	956	if (periodiccnt)
684	{	957	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	958	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
686	if (block > to) block = to;	959	if (block > to) block = to;
687	}	960	}
688		961
689	if (block < 0.) block = 0.;	962	if (block < 0.) block = 0.;
690	}	963	}
691		964
692	method_poll (block);	965	method_poll (EV_A_ block);
693		966
694	/* update ev_now, do magic */	967	/* update rt_now, do magic */
695	time_update ();	968	time_update (EV_A);
696		969
697	/* queue pending timers and reschedule them */	970	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	971	timers_reify (EV_A); /* relative timers called last */
699	periodics_reify (); /* absolute timers called first */	972	periodics_reify (EV_A); /* absolute timers called first */
700		973
701	/* queue idle watchers unless io or timers are pending */	974	/* queue idle watchers unless io or timers are pending */
702	if (!pendingcnt)	975	if (!pendingcnt)
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	976	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		977
705	/* queue check watchers, to be executed first */	978	/* queue check watchers, to be executed first */
706	if (checkcnt)	979	if (checkcnt)
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	980	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		981
709	call_pending ();	982	call_pending (EV_A);
710	}	983	}
711	while (!ev_loop_done);	984	while (activecnt && !loop_done);
712		985
713	if (ev_loop_done != 2)	986	if (loop_done != 2)
714	ev_loop_done = 0;	987	loop_done = 0;
		988	}
		989
		990	void
		991	ev_unloop (EV_P_ int how)
		992	{
		993	loop_done = how;
715	}	994	}
716		995
717	/*****************************************************************************/	996	/*****************************************************************************/
718		997
719	static void	998	inline void
720	wlist_add (WL *head, WL elem)	999	wlist_add (WL *head, WL elem)
721	{	1000	{
722	elem->next = *head;	1001	elem->next = *head;
723	*head = elem;	1002	*head = elem;
724	}	1003	}
725		1004
726	static void	1005	inline void
727	wlist_del (WL *head, WL elem)	1006	wlist_del (WL *head, WL elem)
728	{	1007	{
729	while (*head)	1008	while (*head)
730	{	1009	{
731	if (*head == elem)	1010	if (*head == elem)
…		…
736		1015
737	head = &(*head)->next;	1016	head = &(*head)->next;
738	}	1017	}
739	}	1018	}
740		1019
741	static void	1020	inline void
742	ev_clear_pending (W w)	1021	ev_clear_pending (EV_P_ W w)
743	{	1022	{
744	if (w->pending)	1023	if (w->pending)
745	{	1024	{
746	pendings [w->pending - 1].w = 0;	1025	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1026	w->pending = 0;
748	}	1027	}
749	}	1028	}
750		1029
751	static void	1030	inline void
752	ev_start (W w, int active)	1031	ev_start (EV_P_ W w, int active)
753	{	1032	{
		1033	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1034	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1035
754	w->active = active;	1036	w->active = active;
		1037	ev_ref (EV_A);
755	}	1038	}
756		1039
757	static void	1040	inline void
758	ev_stop (W w)	1041	ev_stop (EV_P_ W w)
759	{	1042	{
		1043	ev_unref (EV_A);
760	w->active = 0;	1044	w->active = 0;
761	}	1045	}
762		1046
763	/*****************************************************************************/	1047	/*****************************************************************************/
764		1048
765	void	1049	void
766	ev_io_start (struct ev_io *w)	1050	ev_io_start (EV_P_ struct ev_io *w)
767	{	1051	{
		1052	int fd = w->fd;
		1053
768	if (ev_is_active (w))	1054	if (ev_is_active (w))
769	return;	1055	return;
770		1056
771	int fd = w->fd;
772
773	assert (("ev_io_start called with negative fd", fd >= 0));	1057	assert (("ev_io_start called with negative fd", fd >= 0));
774		1058
775	ev_start ((W)w, 1);	1059	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1060	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1061	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1062
779	fd_change (fd);	1063	fd_change (EV_A_ fd);
780	}	1064	}
781		1065
782	void	1066	void
783	ev_io_stop (struct ev_io *w)	1067	ev_io_stop (EV_P_ struct ev_io *w)
784	{	1068	{
785	ev_clear_pending ((W)w);	1069	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1070	if (!ev_is_active (w))
787	return;	1071	return;
788		1072
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1073	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1074	ev_stop (EV_A_ (W)w);
791		1075
792	fd_change (w->fd);	1076	fd_change (EV_A_ w->fd);
793	}	1077	}
794		1078
795	void	1079	void
796	ev_timer_start (struct ev_timer *w)	1080	ev_timer_start (EV_P_ struct ev_timer *w)
797	{	1081	{
798	if (ev_is_active (w))	1082	if (ev_is_active (w))
799	return;	1083	return;
800		1084
801	w->at += now;	1085	w->at += mn_now;
802		1086
803	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1087	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
804		1088
805	ev_start ((W)w, ++timercnt);	1089	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1090	array_needsize (timers, timermax, timercnt, );
807	timers [timercnt - 1] = w;	1091	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1092	upheap ((WT *)timers, timercnt - 1);
809	}	1093	}
810		1094
811	void	1095	void
812	ev_timer_stop (struct ev_timer *w)	1096	ev_timer_stop (EV_P_ struct ev_timer *w)
813	{	1097	{
814	ev_clear_pending ((W)w);	1098	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1099	if (!ev_is_active (w))
816	return;	1100	return;
817		1101
818	if (w->active < timercnt--)	1102	if (w->active < timercnt--)
819	{	1103	{
…		…
821	downheap ((WT *)timers, timercnt, w->active - 1);	1105	downheap ((WT *)timers, timercnt, w->active - 1);
822	}	1106	}
823		1107
824	w->at = w->repeat;	1108	w->at = w->repeat;
825		1109
826	ev_stop ((W)w);	1110	ev_stop (EV_A_ (W)w);
827	}	1111	}
828		1112
829	void	1113	void
830	ev_timer_again (struct ev_timer *w)	1114	ev_timer_again (EV_P_ struct ev_timer *w)
831	{	1115	{
832	if (ev_is_active (w))	1116	if (ev_is_active (w))
833	{	1117	{
834	if (w->repeat)	1118	if (w->repeat)
835	{	1119	{
836	w->at = now + w->repeat;	1120	w->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1121	downheap ((WT *)timers, timercnt, w->active - 1);
838	}	1122	}
839	else	1123	else
840	ev_timer_stop (w);	1124	ev_timer_stop (EV_A_ w);
841	}	1125	}
842	else if (w->repeat)	1126	else if (w->repeat)
843	ev_timer_start (w);	1127	ev_timer_start (EV_A_ w);
844	}	1128	}
845		1129
846	void	1130	void
847	ev_periodic_start (struct ev_periodic *w)	1131	ev_periodic_start (EV_P_ struct ev_periodic *w)
848	{	1132	{
849	if (ev_is_active (w))	1133	if (ev_is_active (w))
850	return;	1134	return;
851		1135
852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1136	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
853		1137
854	/* this formula differs from the one in periodic_reify because we do not always round up */	1138	/* this formula differs from the one in periodic_reify because we do not always round up */
855	if (w->interval)	1139	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1140	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
857		1141
858	ev_start ((W)w, ++periodiccnt);	1142	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1143	array_needsize (periodics, periodicmax, periodiccnt, );
860	periodics [periodiccnt - 1] = w;	1144	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1145	upheap ((WT *)periodics, periodiccnt - 1);
862	}	1146	}
863		1147
864	void	1148	void
865	ev_periodic_stop (struct ev_periodic *w)	1149	ev_periodic_stop (EV_P_ struct ev_periodic *w)
866	{	1150	{
867	ev_clear_pending ((W)w);	1151	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1152	if (!ev_is_active (w))
869	return;	1153	return;
870		1154
871	if (w->active < periodiccnt--)	1155	if (w->active < periodiccnt--)
872	{	1156	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1157	periodics [w->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1158	downheap ((WT *)periodics, periodiccnt, w->active - 1);
875	}	1159	}
876		1160
877	ev_stop ((W)w);	1161	ev_stop (EV_A_ (W)w);
878	}	1162	}
879		1163
880	void	1164	void
881	ev_signal_start (struct ev_signal *w)	1165	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1166	{
883	if (ev_is_active (w))	1167	if (ev_is_active (w))
884	return;	1168	return;
885		1169
		1170	ev_start (EV_A_ (W)w, ++idlecnt);
		1171	array_needsize (idles, idlemax, idlecnt, );
		1172	idles [idlecnt - 1] = w;
		1173	}
		1174
		1175	void
		1176	ev_idle_stop (EV_P_ struct ev_idle *w)
		1177	{
		1178	ev_clear_pending (EV_A_ (W)w);
		1179	if (ev_is_active (w))
		1180	return;
		1181
		1182	idles [w->active - 1] = idles [--idlecnt];
		1183	ev_stop (EV_A_ (W)w);
		1184	}
		1185
		1186	void
		1187	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1188	{
		1189	if (ev_is_active (w))
		1190	return;
		1191
		1192	ev_start (EV_A_ (W)w, ++preparecnt);
		1193	array_needsize (prepares, preparemax, preparecnt, );
		1194	prepares [preparecnt - 1] = w;
		1195	}
		1196
		1197	void
		1198	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1199	{
		1200	ev_clear_pending (EV_A_ (W)w);
		1201	if (ev_is_active (w))
		1202	return;
		1203
		1204	prepares [w->active - 1] = prepares [--preparecnt];
		1205	ev_stop (EV_A_ (W)w);
		1206	}
		1207
		1208	void
		1209	ev_check_start (EV_P_ struct ev_check *w)
		1210	{
		1211	if (ev_is_active (w))
		1212	return;
		1213
		1214	ev_start (EV_A_ (W)w, ++checkcnt);
		1215	array_needsize (checks, checkmax, checkcnt, );
		1216	checks [checkcnt - 1] = w;
		1217	}
		1218
		1219	void
		1220	ev_check_stop (EV_P_ struct ev_check *w)
		1221	{
		1222	ev_clear_pending (EV_A_ (W)w);
		1223	if (ev_is_active (w))
		1224	return;
		1225
		1226	checks [w->active - 1] = checks [--checkcnt];
		1227	ev_stop (EV_A_ (W)w);
		1228	}
		1229
		1230	#ifndef SA_RESTART
		1231	# define SA_RESTART 0
		1232	#endif
		1233
		1234	void
		1235	ev_signal_start (EV_P_ struct ev_signal *w)
		1236	{
		1237	#if EV_MULTIPLICITY
		1238	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1239	#endif
		1240	if (ev_is_active (w))
		1241	return;
		1242
886	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1243	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
887		1244
888	ev_start ((W)w, 1);	1245	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1246	array_needsize (signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1247	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1248
892	if (!w->next)	1249	if (!w->next)
893	{	1250	{
894	struct sigaction sa;	1251	struct sigaction sa;
895	sa.sa_handler = sighandler;	1252	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1253	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1254	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1255	sigaction (w->signum, &sa, 0);
899	}	1256	}
900	}	1257	}
901		1258
902	void	1259	void
903	ev_signal_stop (struct ev_signal *w)	1260	ev_signal_stop (EV_P_ struct ev_signal *w)
904	{	1261	{
905	ev_clear_pending ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
907	return;	1264	return;
908		1265
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1266	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1267	ev_stop (EV_A_ (W)w);
911		1268
912	if (!signals [w->signum - 1].head)	1269	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1270	signal (w->signum, SIG_DFL);
914	}	1271	}
915		1272
916	void	1273	void
917	ev_idle_start (struct ev_idle *w)	1274	ev_child_start (EV_P_ struct ev_child *w)
918	{	1275	{
		1276	#if EV_MULTIPLICITY
		1277	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1278	#endif
919	if (ev_is_active (w))	1279	if (ev_is_active (w))
920	return;	1280	return;
921		1281
922	ev_start ((W)w, ++idlecnt);	1282	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	1283	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	1284	}
926		1285
927	void	1286	void
928	ev_idle_stop (struct ev_idle *w)	1287	ev_child_stop (EV_P_ struct ev_child *w)
929	{	1288	{
930	ev_clear_pending ((W)w);	1289	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1290	if (ev_is_active (w))
932	return;	1291	return;
933		1292
934	idles [w->active - 1] = idles [--idlecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_prepare_start (struct ev_prepare *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++preparecnt);
945	array_needsize (prepares, preparemax, preparecnt, );
946	prepares [preparecnt - 1] = w;
947	}
948
949	void
950	ev_prepare_stop (struct ev_prepare *w)
951	{
952	ev_clear_pending ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	prepares [w->active - 1] = prepares [--preparecnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_check_start (struct ev_check *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, ++checkcnt);
967	array_needsize (checks, checkmax, checkcnt, );
968	checks [checkcnt - 1] = w;
969	}
970
971	void
972	ev_check_stop (struct ev_check *w)
973	{
974	ev_clear_pending ((W)w);
975	if (ev_is_active (w))
976	return;
977
978	checks [w->active - 1] = checks [--checkcnt];
979	ev_stop ((W)w);
980	}
981
982	void
983	ev_child_start (struct ev_child *w)
984	{
985	if (ev_is_active (w))
986	return;
987
988	ev_start ((W)w, 1);
989	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	}
991
992	void
993	ev_child_stop (struct ev_child *w)
994	{
995	ev_clear_pending ((W)w);
996	if (ev_is_active (w))
997	return;
998
999	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1293	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1294	ev_stop (EV_A_ (W)w);
1001	}	1295	}
1002		1296
1003	/*****************************************************************************/	1297	/*****************************************************************************/
1004		1298
1005	struct ev_once	1299	struct ev_once
…		…
1009	void (*cb)(int revents, void *arg);	1303	void (*cb)(int revents, void *arg);
1010	void *arg;	1304	void *arg;
1011	};	1305	};
1012		1306
1013	static void	1307	static void
1014	once_cb (struct ev_once *once, int revents)	1308	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1309	{
1016	void (*cb)(int revents, void *arg) = once->cb;	1310	void (*cb)(int revents, void *arg) = once->cb;
1017	void *arg = once->arg;	1311	void *arg = once->arg;
1018		1312
1019	ev_io_stop (&once->io);	1313	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1314	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1315	free (once);
1022		1316
1023	cb (revents, arg);	1317	cb (revents, arg);
1024	}	1318	}
1025		1319
1026	static void	1320	static void
1027	once_cb_io (struct ev_io *w, int revents)	1321	once_cb_io (EV_P_ struct ev_io *w, int revents)
1028	{	1322	{
1029	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1323	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1030	}	1324	}
1031		1325
1032	static void	1326	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1327	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1034	{	1328	{
1035	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1329	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1036	}	1330	}
1037		1331
1038	void	1332	void
1039	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1333	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1040	{	1334	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1335	struct ev_once *once = malloc (sizeof (struct ev_once));
1042		1336
1043	if (!once)	1337	if (!once)
1044	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1338	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1049		1343
1050	ev_watcher_init (&once->io, once_cb_io);	1344	ev_watcher_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1345	if (fd >= 0)
1052	{	1346	{
1053	ev_io_set (&once->io, fd, events);	1347	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1348	ev_io_start (EV_A_ &once->io);
1055	}	1349	}
1056		1350
1057	ev_watcher_init (&once->to, once_cb_to);	1351	ev_watcher_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1352	if (timeout >= 0.)
1059	{	1353	{
1060	ev_timer_set (&once->to, timeout, 0.);	1354	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1355	ev_timer_start (EV_A_ &once->to);
1062	}	1356	}
1063	}	1357	}
1064	}	1358	}
1065		1359
1066	/*****************************************************************************/
1067
1068	#if 0
1069
1070	struct ev_io wio;
1071
1072	static void
1073	sin_cb (struct ev_io *w, int revents)
1074	{
1075	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1076	}
1077
1078	static void
1079	ocb (struct ev_timer *w, int revents)
1080	{
1081	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1082	ev_timer_stop (w);
1083	ev_timer_start (w);
1084	}
1085
1086	static void
1087	scb (struct ev_signal *w, int revents)
1088	{
1089	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1090	ev_io_stop (&wio);
1091	ev_io_start (&wio);
1092	}
1093
1094	static void
1095	gcb (struct ev_signal *w, int revents)
1096	{
1097	fprintf (stderr, "generic %x\n", revents);
1098
1099	}
1100
1101	int main (void)
1102	{
1103	ev_init (0);
1104
1105	ev_io_init (&wio, sin_cb, 0, EV_READ);
1106	ev_io_start (&wio);
1107
1108	struct ev_timer t[10000];
1109
1110	#if 0
1111	int i;
1112	for (i = 0; i < 10000; ++i)
1113	{
1114	struct ev_timer *w = t + i;
1115	ev_watcher_init (w, ocb, i);
1116	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1117	ev_timer_start (w);
1118	if (drand48 () < 0.5)
1119	ev_timer_stop (w);
1120	}
1121	#endif
1122
1123	struct ev_timer t1;
1124	ev_timer_init (&t1, ocb, 5, 10);
1125	ev_timer_start (&t1);
1126
1127	struct ev_signal sig;
1128	ev_signal_init (&sig, scb, SIGQUIT);
1129	ev_signal_start (&sig);
1130
1131	struct ev_check cw;
1132	ev_check_init (&cw, gcb);
1133	ev_check_start (&cw);
1134
1135	struct ev_idle iw;
1136	ev_idle_init (&iw, gcb);
1137	ev_idle_start (&iw);
1138
1139	ev_loop (0);
1140
1141	return 0;
1142	}
1143
1144	#endif
1145
1146
1147
1148

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