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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 1.65 by root, Sun Nov 4 23:29:48 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
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
33	#endif	55	#endif
34		56
35	#include <math.h>	57	#include <math.h>
36	#include <stdlib.h>	58	#include <stdlib.h>
37	#include <unistd.h>	59	#include <unistd.h>
…		…
42	#include <stdio.h>	64	#include <stdio.h>
43		65
44	#include <assert.h>	66	#include <assert.h>
45	#include <errno.h>	67	#include <errno.h>
46	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
47	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
48	#include <sys/time.h>	72	#include <sys/time.h>
49	#include <time.h>	73	#include <time.h>
50		74
		75	/**/
		76
51	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
54	# endif
55	#endif	79	#endif
56		80
57	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
59	#endif	83	#endif
60		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
61	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
63	#endif	91	#endif
64		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
65	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
67	#endif	119	#endif
68	#ifndef EV_USE_REALTIME	120
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
70	#endif
71		122
72	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#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) */	124	#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 */	125	#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 */	126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
76		127
77	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
78		143
79	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
82		147
83	static ev_tstamp now, diff; /* monotonic clock */	148	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		149
93	/*****************************************************************************/	150	/*****************************************************************************/
94		151
95	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
96	ev_time (void)	186	ev_time (void)
97	{	187	{
98	#if EV_USE_REALTIME	188	#if EV_USE_REALTIME
99	struct timespec ts;	189	struct timespec ts;
100	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
…		…
104	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	196	#endif
107	}	197	}
108		198
109	static ev_tstamp	199	inline ev_tstamp
110	get_clock (void)	200	get_clock (void)
111	{	201	{
112	#if EV_USE_MONOTONIC	202	#if EV_USE_MONOTONIC
113	if (have_monotonic)	203	if (expect_true (have_monotonic))
114	{	204	{
115	struct timespec ts;	205	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	208	}
119	#endif	209	#endif
120		210
121	return ev_time ();	211	return ev_time ();
122	}	212	}
123		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
124	#define array_roundsize(base,n) ((n) | 4 & ~3)	220	#define array_roundsize(base,n) ((n) | 4 & ~3)
125		221
126	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
127	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
128	{ \	224	{ \
129	int newcnt = cur; \	225	int newcnt = cur; \
130	do \	226	do \
131	{ \	227	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	228	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	base = realloc (base, sizeof (*base) * (newcnt)); \	232	base = realloc (base, sizeof (*base) * (newcnt)); \
137	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
138	cur = newcnt; \	234	cur = newcnt; \
139	}	235	}
140		236
		237	#define array_free(stem, idx) \
		238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		239
141	/*****************************************************************************/	240	/*****************************************************************************/
142
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		241
153	static void	242	static void
154	anfds_init (ANFD *base, int count)	243	anfds_init (ANFD *base, int count)
155	{	244	{
156	while (count--)	245	while (count--)
…		…
161		250
162	++base;	251	++base;
163	}	252	}
164	}	253	}
165		254
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	255	static void
176	event (W w, int events)	256	event (EV_P_ W w, int events)
177	{	257	{
178	if (w->pending)	258	if (w->pending)
179	{	259	{
180	pendings [w->pending - 1].events |= events;	260	pendings [ABSPRI (w)][w->pending - 1].events |= events;
181	return;	261	return;
182	}	262	}
183		263
184	w->pending = ++pendingcnt;	264	w->pending = ++pendingcnt [ABSPRI (w)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
186	pendings [pendingcnt - 1].w = w;	266	pendings [ABSPRI (w)][w->pending - 1].w = w;
187	pendings [pendingcnt - 1].events = events;	267	pendings [ABSPRI (w)][w->pending - 1].events = events;
188	}	268	}
189		269
190	static void	270	static void
191	queue_events (W *events, int eventcnt, int type)	271	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	272	{
193	int i;	273	int i;
194		274
195	for (i = 0; i < eventcnt; ++i)	275	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	276	event (EV_A_ events [i], type);
197	}	277	}
198		278
199	static void	279	static void
200	fd_event (int fd, int events)	280	fd_event (EV_P_ int fd, int events)
201	{	281	{
202	ANFD *anfd = anfds + fd;	282	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	283	struct ev_io *w;
204		284
205	for (w = anfd->head; w; w = w->next)	285	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
206	{	286	{
207	int ev = w->events & events;	287	int ev = w->events & events;
208		288
209	if (ev)	289	if (ev)
210	event ((W)w, ev);	290	event (EV_A_ (W)w, ev);
211	}	291	}
212	}	292	}
213		293
214	/*****************************************************************************/	294	/*****************************************************************************/
215		295
216	static int *fdchanges;
217	static int fdchangemax, fdchangecnt;
218
219	static void	296	static void
220	fd_reify (void)	297	fd_reify (EV_P)
221	{	298	{
222	int i;	299	int i;
223		300
224	for (i = 0; i < fdchangecnt; ++i)	301	for (i = 0; i < fdchangecnt; ++i)
225	{	302	{
…		…
227	ANFD *anfd = anfds + fd;	304	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	305	struct ev_io *w;
229		306
230	int events = 0;	307	int events = 0;
231		308
232	for (w = anfd->head; w; w = w->next)	309	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
233	events |= w->events;	310	events |= w->events;
234		311
235	anfd->reify = 0;	312	anfd->reify = 0;
236		313
237	if (anfd->events != events)
238	{
239	method_modify (fd, anfd->events, events);	314	method_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	315	anfd->events = events;
241	}
242	}	316	}
243		317
244	fdchangecnt = 0;	318	fdchangecnt = 0;
245	}	319	}
246		320
247	static void	321	static void
248	fd_change (int fd)	322	fd_change (EV_P_ int fd)
249	{	323	{
250	if (anfds [fd].reify || fdchangecnt < 0)	324	if (anfds [fd].reify || fdchangecnt < 0)
251	return;	325	return;
252		326
253	anfds [fd].reify = 1;	327	anfds [fd].reify = 1;
…		…
255	++fdchangecnt;	329	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
257	fdchanges [fdchangecnt - 1] = fd;	331	fdchanges [fdchangecnt - 1] = fd;
258	}	332	}
259		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		343	}
		344	}
		345
260	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
261	static void	347	static void
262	fd_recheck (void)	348	fd_ebadf (EV_P)
263	{	349	{
264	int fd;	350	int fd;
265		351
266	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	353	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
269	while (anfds [fd].head)	355	fd_kill (EV_A_ fd);
		356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
270	{	366	{
271	ev_io_stop (anfds [fd].head);	367	close (fd);
272	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	368	fd_kill (EV_A_ fd);
		369	return;
273	}	370	}
		371	}
		372
		373	/* susually called after fork if method needs to re-arm all fds from scratch */
		374	static void
		375	fd_rearm_all (EV_P)
		376	{
		377	int fd;
		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
274	}	386	}
275		387
276	/*****************************************************************************/	388	/*****************************************************************************/
277		389
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	390	static void
285	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
286	{	392	{
287	WT w = timers [k];	393	WT w = heap [k];
288		394
289	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
290	{	396	{
291	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
293	k >>= 1;	399	k >>= 1;
294	}	400	}
295		401
296	timers [k] = w;	402	heap [k] = w;
297	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
298		404
299	}	405	}
300		406
301	static void	407	static void
302	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
303	{	409	{
304	WT w = timers [k];	410	WT w = heap [k];
305		411
306	while (k < (N >> 1))	412	while (k < (N >> 1))
307	{	413	{
308	int j = k << 1;	414	int j = k << 1;
309		415
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	417	++j;
312		418
313	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
314	break;	420	break;
315		421
316	timers [k] = timers [j];	422	heap [k] = heap [j];
317	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
318	k = j;	424	k = j;
319	}	425	}
320		426
321	timers [k] = w;	427	heap [k] = w;
322	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
323	}	429	}
324		430
325	/*****************************************************************************/	431	/*****************************************************************************/
326		432
327	typedef struct	433	typedef struct
328	{	434	{
329	struct ev_signal *head;	435	struct ev_watcher_list *head;
330	sig_atomic_t volatile gotsig;	436	sig_atomic_t volatile gotsig;
331	} ANSIG;	437	} ANSIG;
332		438
333	static ANSIG *signals;	439	static ANSIG *signals;
334	static int signalmax;	440	static int signalmax;
…		…
354	{	460	{
355	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
356		462
357	if (!gotsig)	463	if (!gotsig)
358	{	464	{
		465	int old_errno = errno;
359	gotsig = 1;	466	gotsig = 1;
360	write (sigpipe [1], &signum, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
361	}	469	}
362	}	470	}
363		471
364	static void	472	static void
365	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
366	{	474	{
367	struct ev_signal *w;	475	struct ev_watcher_list *w;
368	int sig;	476	int signum;
369		477
370	read (sigpipe [0], &revents, 1);	478	read (sigpipe [0], &revents, 1);
371	gotsig = 0;	479	gotsig = 0;
372		480
373	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
375	{	483	{
376	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
377		485
378	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
380	}	488	}
381	}	489	}
382		490
383	static void	491	static void
384	siginit (void)	492	siginit (EV_P)
385	{	493	{
		494	#ifndef WIN32
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388		497
389	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
392		502
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	506	}
396		507
397	/*****************************************************************************/	508	/*****************************************************************************/
398		509
399	static struct ev_idle **idles;	510	#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		511
410	static struct ev_child *childs [PID_HASHSIZE];	512	static struct ev_child *childs [PID_HASHSIZE];
411	static struct ev_signal childev;	513	static struct ev_signal childev;
412		514
413	#ifndef WCONTINUED	515	#ifndef WCONTINUED
414	# define WCONTINUED 0	516	# define WCONTINUED 0
415	#endif	517	#endif
416		518
417	static void	519	static void
418	childcb (struct ev_signal *sw, int revents)	520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
419	{	521	{
420	struct ev_child *w;	522	struct ev_child *w;
		523
		524	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		525	if (w->pid == pid || !w->pid)
		526	{
		527	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
421	int pid, status;	537	int pid, status;
422		538
423	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	540	{
425	if (w->pid == pid || w->pid == -1)	541	/* make sure we are called again until all childs have been reaped */
426	{	542	event (EV_A_ (W)sw, EV_SIGNAL);
427	w->status = status;	543
428	event ((W)w, EV_CHILD);	544	child_reap (EV_A_ sw, pid, pid, status);
429	}	545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
430	}	547	}
		548
		549	#endif
431		550
432	/*****************************************************************************/	551	/*****************************************************************************/
433		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
434	#if EV_USE_EPOLL	556	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	557	# include "ev_epoll.c"
436	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
437	#if EV_USE_SELECT	562	#if EV_USE_SELECT
438	# include "ev_select.c"	563	# include "ev_select.c"
439	#endif	564	#endif
440		565
441	int	566	int
…		…
448	ev_version_minor (void)	573	ev_version_minor (void)
449	{	574	{
450	return EV_VERSION_MINOR;	575	return EV_VERSION_MINOR;
451	}	576	}
452		577
453	int ev_init (int flags)	578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
454	{	581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	|| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
455	if (!ev_method)	599	if (!method)
456	{	600	{
457	#if EV_USE_MONOTONIC	601	#if EV_USE_MONOTONIC
458	{	602	{
459	struct timespec ts;	603	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	605	have_monotonic = 1;
462	}	606	}
463	#endif	607	#endif
464		608
465	ev_now = ev_time ();	609	rt_now = ev_time ();
466	now = get_clock ();	610	mn_now = get_clock ();
		611	now_floor = mn_now;
467	diff = ev_now - now;	612	rtmn_diff = rt_now - mn_now;
468		613
469	if (pipe (sigpipe))	614	if (methods == EVMETHOD_AUTO)
470	return 0;	615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
471		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
472	ev_method = EVMETHOD_NONE;	618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
473	#if EV_USE_EPOLL	627	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
475	#endif	632	#endif
476	#if EV_USE_SELECT	633	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
478	#endif	635	#endif
		636	}
		637	}
479		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	int i;
		643
		644	#if EV_USE_WIN32
		645	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		646	#endif
		647	#if EV_USE_KQUEUE
		648	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		649	#endif
		650	#if EV_USE_EPOLL
		651	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		652	#endif
		653	#if EV_USE_POLL
		654	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		655	#endif
		656	#if EV_USE_SELECT
		657	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		658	#endif
		659
		660	for (i = NUMPRI; i--; )
		661	array_free (pending, [i]);
		662
		663	array_free (fdchange, );
		664	array_free (timer, );
		665	array_free (periodic, );
		666	array_free (idle, );
		667	array_free (prepare, );
		668	array_free (check, );
		669
		670	method = 0;
		671	/*TODO*/
		672	}
		673
		674	void
		675	loop_fork (EV_P)
		676	{
		677	/*TODO*/
		678	#if EV_USE_EPOLL
		679	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		680	#endif
		681	#if EV_USE_KQUEUE
		682	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		683	#endif
		684	}
		685
		686	#if EV_MULTIPLICITY
		687	struct ev_loop *
		688	ev_loop_new (int methods)
		689	{
		690	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		691
		692	loop_init (EV_A_ methods);
		693
		694	if (ev_method (EV_A))
		695	return loop;
		696
		697	return 0;
		698	}
		699
		700	void
		701	ev_loop_destroy (EV_P)
		702	{
		703	loop_destroy (EV_A);
		704	free (loop);
		705	}
		706
		707	void
		708	ev_loop_fork (EV_P)
		709	{
		710	loop_fork (EV_A);
		711	}
		712
		713	#endif
		714
		715	#if EV_MULTIPLICITY
		716	struct ev_loop default_loop_struct;
		717	static struct ev_loop *default_loop;
		718
		719	struct ev_loop *
		720	#else
		721	static int default_loop;
		722
		723	int
		724	#endif
		725	ev_default_loop (int methods)
		726	{
		727	if (sigpipe [0] == sigpipe [1])
		728	if (pipe (sigpipe))
		729	return 0;
		730
		731	if (!default_loop)
		732	{
		733	#if EV_MULTIPLICITY
		734	struct ev_loop *loop = default_loop = &default_loop_struct;
		735	#else
		736	default_loop = 1;
		737	#endif
		738
		739	loop_init (EV_A_ methods);
		740
480	if (ev_method)	741	if (ev_method (EV_A))
481	{	742	{
482	ev_watcher_init (&sigev, sigcb);	743	ev_watcher_init (&sigev, sigcb);
		744	ev_set_priority (&sigev, EV_MAXPRI);
483	siginit ();	745	siginit (EV_A);
484		746
		747	#ifndef WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	748	ev_signal_init (&childev, childcb, SIGCHLD);
		749	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	750	ev_signal_start (EV_A_ &childev);
		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
		752	#endif
487	}	753	}
		754	else
		755	default_loop = 0;
488	}	756	}
489		757
490	return ev_method;	758	return default_loop;
491	}	759	}
492		760
493	/*****************************************************************************/
494
495	void	761	void
496	ev_fork_prepare (void)	762	ev_default_destroy (void)
497	{	763	{
498	/* nop */	764	#if EV_MULTIPLICITY
499	}	765	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	766	#endif
514		767
		768	ev_ref (EV_A); /* child watcher */
		769	ev_signal_stop (EV_A_ &childev);
		770
		771	ev_ref (EV_A); /* signal watcher */
515	ev_io_stop (&sigev);	772	ev_io_stop (EV_A_ &sigev);
		773
		774	close (sigpipe [0]); sigpipe [0] = 0;
		775	close (sigpipe [1]); sigpipe [1] = 0;
		776
		777	loop_destroy (EV_A);
		778	}
		779
		780	void
		781	ev_default_fork (void)
		782	{
		783	#if EV_MULTIPLICITY
		784	struct ev_loop *loop = default_loop;
		785	#endif
		786
		787	loop_fork (EV_A);
		788
		789	ev_io_stop (EV_A_ &sigev);
516	close (sigpipe [0]);	790	close (sigpipe [0]);
517	close (sigpipe [1]);	791	close (sigpipe [1]);
518	pipe (sigpipe);	792	pipe (sigpipe);
		793
		794	ev_ref (EV_A); /* signal watcher */
519	siginit ();	795	siginit (EV_A);
520	}	796	}
521		797
522	/*****************************************************************************/	798	/*****************************************************************************/
523		799
524	static void	800	static void
525	call_pending (void)	801	call_pending (EV_P)
526	{	802	{
		803	int pri;
		804
		805	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	806	while (pendingcnt [pri])
528	{	807	{
529	ANPENDING *p = pendings + --pendingcnt;	808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		809
531	if (p->w)	810	if (p->w)
532	{	811	{
533	p->w->pending = 0;	812	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	813
		814	((void (*)(EV_P_ W, int))p->w->cb) (EV_A_ p->w, p->events);
535	}	815	}
536	}	816	}
537	}	817	}
538		818
539	static void	819	static void
540	timers_reify (void)	820	timers_reify (EV_P)
541	{	821	{
542	while (timercnt && timers [0]->at <= now)	822	while (timercnt && ((WT)timers [0])->at <= mn_now)
543	{	823	{
544	struct ev_timer *w = timers [0];	824	struct ev_timer *w = timers [0];
		825
		826	assert (("inactive timer on timer heap detected", ev_is_active (w)));
545		827
546	/* first reschedule or stop timer */	828	/* first reschedule or stop timer */
547	if (w->repeat)	829	if (w->repeat)
548	{	830	{
549	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	831	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
550	w->at = now + w->repeat;	832	((WT)w)->at = mn_now + w->repeat;
551	downheap ((WT *)timers, timercnt, 0);	833	downheap ((WT *)timers, timercnt, 0);
552	}	834	}
553	else	835	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	836	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		837
556	event ((W)w, EV_TIMEOUT);	838	event (EV_A_ (W)w, EV_TIMEOUT);
557	}	839	}
558	}	840	}
559		841
560	static void	842	static void
561	periodics_reify (void)	843	periodics_reify (EV_P)
562	{	844	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	845	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
564	{	846	{
565	struct ev_periodic *w = periodics [0];	847	struct ev_periodic *w = periodics [0];
		848
		849	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
566		850
567	/* first reschedule or stop timer */	851	/* first reschedule or stop timer */
568	if (w->interval)	852	if (w->interval)
569	{	853	{
570	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	854	((WT)w)->at += floor ((rt_now - ((WT)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));	855	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
572	downheap ((WT *)periodics, periodiccnt, 0);	856	downheap ((WT *)periodics, periodiccnt, 0);
573	}	857	}
574	else	858	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	859	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		860
577	event ((W)w, EV_PERIODIC);	861	event (EV_A_ (W)w, EV_PERIODIC);
578	}	862	}
579	}	863	}
580		864
581	static void	865	static void
582	periodics_reschedule (ev_tstamp diff)	866	periodics_reschedule (EV_P)
583	{	867	{
584	int i;	868	int i;
585		869
586	/* adjust periodics after time jump */	870	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	871	for (i = 0; i < periodiccnt; ++i)
588	{	872	{
589	struct ev_periodic *w = periodics [i];	873	struct ev_periodic *w = periodics [i];
590		874
591	if (w->interval)	875	if (w->interval)
592	{	876	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	877	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
594		878
595	if (fabs (diff) >= 1e-4)	879	if (fabs (diff) >= 1e-4)
596	{	880	{
597	ev_periodic_stop (w);	881	ev_periodic_stop (EV_A_ w);
598	ev_periodic_start (w);	882	ev_periodic_start (EV_A_ w);
599		883
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	884	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	885	}
602	}	886	}
603	}	887	}
604	}	888	}
605		889
		890	inline int
		891	time_update_monotonic (EV_P)
		892	{
		893	mn_now = get_clock ();
		894
		895	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		896	{
		897	rt_now = rtmn_diff + mn_now;
		898	return 0;
		899	}
		900	else
		901	{
		902	now_floor = mn_now;
		903	rt_now = ev_time ();
		904	return 1;
		905	}
		906	}
		907
606	static void	908	static void
607	time_update (void)	909	time_update (EV_P)
608	{	910	{
609	int i;	911	int i;
610		912
611	ev_now = ev_time ();	913	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	914	if (expect_true (have_monotonic))
614	{	915	{
615	ev_tstamp odiff = diff;	916	if (time_update_monotonic (EV_A))
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	917	{
619	now = get_clock ();	918	ev_tstamp odiff = rtmn_diff;
		919
		920	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		921	{
620	diff = ev_now - now;	922	rtmn_diff = rt_now - mn_now;
621		923
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	924	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	925	return; /* all is well */
624		926
625	ev_now = ev_time ();	927	rt_now = ev_time ();
		928	mn_now = get_clock ();
		929	now_floor = mn_now;
		930	}
		931
		932	periodics_reschedule (EV_A);
		933	/* no timer adjustment, as the monotonic clock doesn't jump */
		934	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
626	}	935	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}	936	}
631	else	937	else
		938	#endif
632	{	939	{
633	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	940	rt_now = ev_time ();
		941
		942	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
634	{	943	{
635	periodics_reschedule (ev_now - now);	944	periodics_reschedule (EV_A);
636		945
637	/* adjust timers. this is easy, as the offset is the same for all */	946	/* adjust timers. this is easy, as the offset is the same for all */
638	for (i = 0; i < timercnt; ++i)	947	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	948	((WT)timers [i])->at += rt_now - mn_now;
640	}	949	}
641		950
642	now = ev_now;	951	mn_now = rt_now;
643	}	952	}
644	}	953	}
645		954
646	int ev_loop_done;	955	void
		956	ev_ref (EV_P)
		957	{
		958	++activecnt;
		959	}
647		960
		961	void
		962	ev_unref (EV_P)
		963	{
		964	--activecnt;
		965	}
		966
		967	static int loop_done;
		968
		969	void
648	void ev_loop (int flags)	970	ev_loop (EV_P_ int flags)
649	{	971	{
650	double block;	972	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	973	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
652		974
653	do	975	do
654	{	976	{
655	/* queue check watchers (and execute them) */	977	/* queue check watchers (and execute them) */
656	if (preparecnt)	978	if (expect_false (preparecnt))
657	{	979	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	980	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	981	call_pending (EV_A);
660	}	982	}
661		983
662	/* update fd-related kernel structures */	984	/* update fd-related kernel structures */
663	fd_reify ();	985	fd_reify (EV_A);
664		986
665	/* calculate blocking time */	987	/* calculate blocking time */
666		988
667	/* we only need this for !monotonic clockor timers, but as we basically	989	/* we only need this for !monotonic clockor timers, but as we basically
668	always have timers, we just calculate it always */	990	always have timers, we just calculate it always */
		991	#if EV_USE_MONOTONIC
		992	if (expect_true (have_monotonic))
		993	time_update_monotonic (EV_A);
		994	else
		995	#endif
		996	{
669	ev_now = ev_time ();	997	rt_now = ev_time ();
		998	mn_now = rt_now;
		999	}
670		1000
671	if (flags & EVLOOP_NONBLOCK || idlecnt)	1001	if (flags & EVLOOP_NONBLOCK || idlecnt)
672	block = 0.;	1002	block = 0.;
673	else	1003	else
674	{	1004	{
675	block = MAX_BLOCKTIME;	1005	block = MAX_BLOCKTIME;
676		1006
677	if (timercnt)	1007	if (timercnt)
678	{	1008	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1009	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
680	if (block > to) block = to;	1010	if (block > to) block = to;
681	}	1011	}
682		1012
683	if (periodiccnt)	1013	if (periodiccnt)
684	{	1014	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1015	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
686	if (block > to) block = to;	1016	if (block > to) block = to;
687	}	1017	}
688		1018
689	if (block < 0.) block = 0.;	1019	if (block < 0.) block = 0.;
690	}	1020	}
691		1021
692	method_poll (block);	1022	method_poll (EV_A_ block);
693		1023
694	/* update ev_now, do magic */	1024	/* update rt_now, do magic */
695	time_update ();	1025	time_update (EV_A);
696		1026
697	/* queue pending timers and reschedule them */	1027	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	1028	timers_reify (EV_A); /* relative timers called last */
699	periodics_reify (); /* absolute timers called first */	1029	periodics_reify (EV_A); /* absolute timers called first */
700		1030
701	/* queue idle watchers unless io or timers are pending */	1031	/* queue idle watchers unless io or timers are pending */
702	if (!pendingcnt)	1032	if (!pendingcnt)
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	1033	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		1034
705	/* queue check watchers, to be executed first */	1035	/* queue check watchers, to be executed first */
706	if (checkcnt)	1036	if (checkcnt)
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	1037	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		1038
709	call_pending ();	1039	call_pending (EV_A);
710	}	1040	}
711	while (!ev_loop_done);	1041	while (activecnt && !loop_done);
712		1042
713	if (ev_loop_done != 2)	1043	if (loop_done != 2)
714	ev_loop_done = 0;	1044	loop_done = 0;
		1045	}
		1046
		1047	void
		1048	ev_unloop (EV_P_ int how)
		1049	{
		1050	loop_done = how;
715	}	1051	}
716		1052
717	/*****************************************************************************/	1053	/*****************************************************************************/
718		1054
719	static void	1055	inline void
720	wlist_add (WL *head, WL elem)	1056	wlist_add (WL *head, WL elem)
721	{	1057	{
722	elem->next = *head;	1058	elem->next = *head;
723	*head = elem;	1059	*head = elem;
724	}	1060	}
725		1061
726	static void	1062	inline void
727	wlist_del (WL *head, WL elem)	1063	wlist_del (WL *head, WL elem)
728	{	1064	{
729	while (*head)	1065	while (*head)
730	{	1066	{
731	if (*head == elem)	1067	if (*head == elem)
…		…
736		1072
737	head = &(*head)->next;	1073	head = &(*head)->next;
738	}	1074	}
739	}	1075	}
740		1076
741	static void	1077	inline void
742	ev_clear_pending (W w)	1078	ev_clear_pending (EV_P_ W w)
743	{	1079	{
744	if (w->pending)	1080	if (w->pending)
745	{	1081	{
746	pendings [w->pending - 1].w = 0;	1082	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1083	w->pending = 0;
748	}	1084	}
749	}	1085	}
750		1086
751	static void	1087	inline void
752	ev_start (W w, int active)	1088	ev_start (EV_P_ W w, int active)
753	{	1089	{
		1090	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1091	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1092
754	w->active = active;	1093	w->active = active;
		1094	ev_ref (EV_A);
755	}	1095	}
756		1096
757	static void	1097	inline void
758	ev_stop (W w)	1098	ev_stop (EV_P_ W w)
759	{	1099	{
		1100	ev_unref (EV_A);
760	w->active = 0;	1101	w->active = 0;
761	}	1102	}
762		1103
763	/*****************************************************************************/	1104	/*****************************************************************************/
764		1105
765	void	1106	void
766	ev_io_start (struct ev_io *w)	1107	ev_io_start (EV_P_ struct ev_io *w)
767	{	1108	{
		1109	int fd = w->fd;
		1110
768	if (ev_is_active (w))	1111	if (ev_is_active (w))
769	return;	1112	return;
770		1113
771	int fd = w->fd;
772
773	assert (("ev_io_start called with negative fd", fd >= 0));	1114	assert (("ev_io_start called with negative fd", fd >= 0));
774		1115
775	ev_start ((W)w, 1);	1116	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1117	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1118	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1119
779	fd_change (fd);	1120	fd_change (EV_A_ fd);
780	}	1121	}
781		1122
782	void	1123	void
783	ev_io_stop (struct ev_io *w)	1124	ev_io_stop (EV_P_ struct ev_io *w)
784	{	1125	{
785	ev_clear_pending ((W)w);	1126	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1127	if (!ev_is_active (w))
787	return;	1128	return;
788		1129
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1130	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1131	ev_stop (EV_A_ (W)w);
791		1132
792	fd_change (w->fd);	1133	fd_change (EV_A_ w->fd);
793	}	1134	}
794		1135
795	void	1136	void
796	ev_timer_start (struct ev_timer *w)	1137	ev_timer_start (EV_P_ struct ev_timer *w)
797	{	1138	{
798	if (ev_is_active (w))	1139	if (ev_is_active (w))
799	return;	1140	return;
800		1141
801	w->at += now;	1142	((WT)w)->at += mn_now;
802		1143
803	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1144	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
804		1145
805	ev_start ((W)w, ++timercnt);	1146	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1147	array_needsize (timers, timermax, timercnt, );
807	timers [timercnt - 1] = w;	1148	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1149	upheap ((WT *)timers, timercnt - 1);
809	}
810		1150
		1151	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1152	}
		1153
811	void	1154	void
812	ev_timer_stop (struct ev_timer *w)	1155	ev_timer_stop (EV_P_ struct ev_timer *w)
813	{	1156	{
814	ev_clear_pending ((W)w);	1157	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1158	if (!ev_is_active (w))
816	return;	1159	return;
817		1160
		1161	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1162
818	if (w->active < timercnt--)	1163	if (((W)w)->active < timercnt--)
819	{	1164	{
820	timers [w->active - 1] = timers [timercnt];	1165	timers [((W)w)->active - 1] = timers [timercnt];
821	downheap ((WT *)timers, timercnt, w->active - 1);	1166	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
822	}	1167	}
823		1168
824	w->at = w->repeat;	1169	((WT)w)->at = w->repeat;
825		1170
826	ev_stop ((W)w);	1171	ev_stop (EV_A_ (W)w);
827	}	1172	}
828		1173
829	void	1174	void
830	ev_timer_again (struct ev_timer *w)	1175	ev_timer_again (EV_P_ struct ev_timer *w)
831	{	1176	{
832	if (ev_is_active (w))	1177	if (ev_is_active (w))
833	{	1178	{
834	if (w->repeat)	1179	if (w->repeat)
835	{	1180	{
836	w->at = now + w->repeat;	1181	((WT)w)->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
838	}	1183	}
839	else	1184	else
840	ev_timer_stop (w);	1185	ev_timer_stop (EV_A_ w);
841	}	1186	}
842	else if (w->repeat)	1187	else if (w->repeat)
843	ev_timer_start (w);	1188	ev_timer_start (EV_A_ w);
844	}	1189	}
845		1190
846	void	1191	void
847	ev_periodic_start (struct ev_periodic *w)	1192	ev_periodic_start (EV_P_ struct ev_periodic *w)
848	{	1193	{
849	if (ev_is_active (w))	1194	if (ev_is_active (w))
850	return;	1195	return;
851		1196
852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1197	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
853		1198
854	/* this formula differs from the one in periodic_reify because we do not always round up */	1199	/* this formula differs from the one in periodic_reify because we do not always round up */
855	if (w->interval)	1200	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1201	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
857		1202
858	ev_start ((W)w, ++periodiccnt);	1203	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1204	array_needsize (periodics, periodicmax, periodiccnt, );
860	periodics [periodiccnt - 1] = w;	1205	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1206	upheap ((WT *)periodics, periodiccnt - 1);
862	}
863		1207
		1208	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1209	}
		1210
864	void	1211	void
865	ev_periodic_stop (struct ev_periodic *w)	1212	ev_periodic_stop (EV_P_ struct ev_periodic *w)
866	{	1213	{
867	ev_clear_pending ((W)w);	1214	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1215	if (!ev_is_active (w))
869	return;	1216	return;
870		1217
		1218	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1219
871	if (w->active < periodiccnt--)	1220	if (((W)w)->active < periodiccnt--)
872	{	1221	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1222	periodics [((W)w)->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1223	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
875	}	1224	}
876		1225
877	ev_stop ((W)w);	1226	ev_stop (EV_A_ (W)w);
878	}	1227	}
879		1228
880	void	1229	void
881	ev_signal_start (struct ev_signal *w)	1230	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1231	{
883	if (ev_is_active (w))	1232	if (ev_is_active (w))
884	return;	1233	return;
885		1234
		1235	ev_start (EV_A_ (W)w, ++idlecnt);
		1236	array_needsize (idles, idlemax, idlecnt, );
		1237	idles [idlecnt - 1] = w;
		1238	}
		1239
		1240	void
		1241	ev_idle_stop (EV_P_ struct ev_idle *w)
		1242	{
		1243	ev_clear_pending (EV_A_ (W)w);
		1244	if (ev_is_active (w))
		1245	return;
		1246
		1247	idles [((W)w)->active - 1] = idles [--idlecnt];
		1248	ev_stop (EV_A_ (W)w);
		1249	}
		1250
		1251	void
		1252	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1253	{
		1254	if (ev_is_active (w))
		1255	return;
		1256
		1257	ev_start (EV_A_ (W)w, ++preparecnt);
		1258	array_needsize (prepares, preparemax, preparecnt, );
		1259	prepares [preparecnt - 1] = w;
		1260	}
		1261
		1262	void
		1263	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1264	{
		1265	ev_clear_pending (EV_A_ (W)w);
		1266	if (ev_is_active (w))
		1267	return;
		1268
		1269	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1270	ev_stop (EV_A_ (W)w);
		1271	}
		1272
		1273	void
		1274	ev_check_start (EV_P_ struct ev_check *w)
		1275	{
		1276	if (ev_is_active (w))
		1277	return;
		1278
		1279	ev_start (EV_A_ (W)w, ++checkcnt);
		1280	array_needsize (checks, checkmax, checkcnt, );
		1281	checks [checkcnt - 1] = w;
		1282	}
		1283
		1284	void
		1285	ev_check_stop (EV_P_ struct ev_check *w)
		1286	{
		1287	ev_clear_pending (EV_A_ (W)w);
		1288	if (ev_is_active (w))
		1289	return;
		1290
		1291	checks [((W)w)->active - 1] = checks [--checkcnt];
		1292	ev_stop (EV_A_ (W)w);
		1293	}
		1294
		1295	#ifndef SA_RESTART
		1296	# define SA_RESTART 0
		1297	#endif
		1298
		1299	void
		1300	ev_signal_start (EV_P_ struct ev_signal *w)
		1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
		1305	if (ev_is_active (w))
		1306	return;
		1307
886	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1308	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
887		1309
888	ev_start ((W)w, 1);	1310	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1311	array_needsize (signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1312	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1313
892	if (!w->next)	1314	if (!((WL)w)->next)
893	{	1315	{
894	struct sigaction sa;	1316	struct sigaction sa;
895	sa.sa_handler = sighandler;	1317	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1318	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1319	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1320	sigaction (w->signum, &sa, 0);
899	}	1321	}
900	}	1322	}
901		1323
902	void	1324	void
903	ev_signal_stop (struct ev_signal *w)	1325	ev_signal_stop (EV_P_ struct ev_signal *w)
904	{	1326	{
905	ev_clear_pending ((W)w);	1327	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1328	if (!ev_is_active (w))
907	return;	1329	return;
908		1330
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1331	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1332	ev_stop (EV_A_ (W)w);
911		1333
912	if (!signals [w->signum - 1].head)	1334	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1335	signal (w->signum, SIG_DFL);
914	}	1336	}
915		1337
916	void	1338	void
917	ev_idle_start (struct ev_idle *w)	1339	ev_child_start (EV_P_ struct ev_child *w)
918	{	1340	{
		1341	#if EV_MULTIPLICITY
		1342	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1343	#endif
919	if (ev_is_active (w))	1344	if (ev_is_active (w))
920	return;	1345	return;
921		1346
922	ev_start ((W)w, ++idlecnt);	1347	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	1348	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	1349	}
926		1350
927	void	1351	void
928	ev_idle_stop (struct ev_idle *w)	1352	ev_child_stop (EV_P_ struct ev_child *w)
929	{	1353	{
930	ev_clear_pending ((W)w);	1354	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1355	if (ev_is_active (w))
932	return;	1356	return;
933		1357
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);	1358	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1359	ev_stop (EV_A_ (W)w);
1001	}	1360	}
1002		1361
1003	/*****************************************************************************/	1362	/*****************************************************************************/
1004		1363
1005	struct ev_once	1364	struct ev_once
…		…
1009	void (*cb)(int revents, void *arg);	1368	void (*cb)(int revents, void *arg);
1010	void *arg;	1369	void *arg;
1011	};	1370	};
1012		1371
1013	static void	1372	static void
1014	once_cb (struct ev_once *once, int revents)	1373	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1374	{
1016	void (*cb)(int revents, void *arg) = once->cb;	1375	void (*cb)(int revents, void *arg) = once->cb;
1017	void *arg = once->arg;	1376	void *arg = once->arg;
1018		1377
1019	ev_io_stop (&once->io);	1378	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1379	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1380	free (once);
1022		1381
1023	cb (revents, arg);	1382	cb (revents, arg);
1024	}	1383	}
1025		1384
1026	static void	1385	static void
1027	once_cb_io (struct ev_io *w, int revents)	1386	once_cb_io (EV_P_ struct ev_io *w, int revents)
1028	{	1387	{
1029	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1388	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1030	}	1389	}
1031		1390
1032	static void	1391	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1392	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1034	{	1393	{
1035	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1394	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1036	}	1395	}
1037		1396
1038	void	1397	void
1039	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1398	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1040	{	1399	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1400	struct ev_once *once = malloc (sizeof (struct ev_once));
1042		1401
1043	if (!once)	1402	if (!once)
1044	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1403	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1049		1408
1050	ev_watcher_init (&once->io, once_cb_io);	1409	ev_watcher_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1410	if (fd >= 0)
1052	{	1411	{
1053	ev_io_set (&once->io, fd, events);	1412	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1413	ev_io_start (EV_A_ &once->io);
1055	}	1414	}
1056		1415
1057	ev_watcher_init (&once->to, once_cb_to);	1416	ev_watcher_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1417	if (timeout >= 0.)
1059	{	1418	{
1060	ev_timer_set (&once->to, timeout, 0.);	1419	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1420	ev_timer_start (EV_A_ &once->to);
1062	}	1421	}
1063	}	1422	}
1064	}	1423	}
1065		1424
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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