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Comparing libev/ev.c (file contents):
Revision 1.38 by root, Thu Nov 1 15:21:13 2007 UTC vs.
Revision 1.63 by root, Sun Nov 4 22:03:17 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	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
53	#endif	79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_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	/**/
54		110
55	#ifndef CLOCK_MONOTONIC	111	#ifndef CLOCK_MONOTONIC
56	# undef EV_USE_MONOTONIC	112	# undef EV_USE_MONOTONIC
57	# define EV_USE_MONOTONIC 0	113	# define EV_USE_MONOTONIC 0
58	#endif	114	#endif
59		115
60	#ifndef EV_USE_SELECT
61	# define EV_USE_SELECT 1
62	#endif
63
64	#ifndef EV_USE_EPOLL
65	# define EV_USE_EPOLL 0
66	#endif
67
68	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
69	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
70	#endif	119	#endif
71	#ifndef EV_USE_REALTIME	120
72	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
73	#endif
74		122
75	#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) */
76	#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) */
77	#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 */
78	#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 */
79		127
80	#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)
81		143
82	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
83	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
84	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
85		147
86	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
87	ev_tstamp ev_now;
88	int ev_method;
89
90	static int have_monotonic; /* runtime */
91
92	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
93	static void (*method_modify)(int fd, int oev, int nev);
94	static void (*method_poll)(ev_tstamp timeout);
95		149
96	/*****************************************************************************/	150	/*****************************************************************************/
97		151
98	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
99	ev_time (void)	186	ev_time (void)
100	{	187	{
101	#if EV_USE_REALTIME	188	#if EV_USE_REALTIME
102	struct timespec ts;	189	struct timespec ts;
103	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
…		…
107	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
108	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
109	#endif	196	#endif
110	}	197	}
111		198
112	static ev_tstamp	199	inline ev_tstamp
113	get_clock (void)	200	get_clock (void)
114	{	201	{
115	#if EV_USE_MONOTONIC	202	#if EV_USE_MONOTONIC
116	if (have_monotonic)	203	if (expect_true (have_monotonic))
117	{	204	{
118	struct timespec ts;	205	struct timespec ts;
119	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
120	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
121	}	208	}
122	#endif	209	#endif
123		210
124	return ev_time ();	211	return ev_time ();
125	}	212	}
126		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
127	#define array_roundsize(base,n) ((n) | 4 & ~3)	220	#define array_roundsize(base,n) ((n) | 4 & ~3)
128		221
129	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
130	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
131	{ \	224	{ \
132	int newcnt = cur; \	225	int newcnt = cur; \
133	do \	226	do \
134	{ \	227	{ \
135	newcnt = array_roundsize (base, newcnt << 1); \	228	newcnt = array_roundsize (base, newcnt << 1); \
…		…
141	cur = newcnt; \	234	cur = newcnt; \
142	}	235	}
143		236
144	/*****************************************************************************/	237	/*****************************************************************************/
145		238
146	typedef struct
147	{
148	struct ev_io *head;
149	unsigned char events;
150	unsigned char reify;
151	} ANFD;
152
153	static ANFD *anfds;
154	static int anfdmax;
155
156	static void	239	static void
157	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
158	{	241	{
159	while (count--)	242	while (count--)
160	{	243	{
…		…
164		247
165	++base;	248	++base;
166	}	249	}
167	}	250	}
168		251
169	typedef struct
170	{
171	W w;
172	int events;
173	} ANPENDING;
174
175	static ANPENDING *pendings;
176	static int pendingmax, pendingcnt;
177
178	static void	252	static void
179	event (W w, int events)	253	event (EV_P_ W w, int events)
180	{	254	{
181	if (w->pending)	255	if (w->pending)
182	{	256	{
183	pendings [w->pending - 1].events |= events;	257	pendings [ABSPRI (w)][w->pending - 1].events |= events;
184	return;	258	return;
185	}	259	}
186		260
187	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
188	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
189	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
190	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
191	}	265	}
192		266
193	static void	267	static void
194	queue_events (W *events, int eventcnt, int type)	268	queue_events (EV_P_ W *events, int eventcnt, int type)
195	{	269	{
196	int i;	270	int i;
197		271
198	for (i = 0; i < eventcnt; ++i)	272	for (i = 0; i < eventcnt; ++i)
199	event (events [i], type);	273	event (EV_A_ events [i], type);
200	}	274	}
201		275
202	static void	276	static void
203	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
204	{	278	{
205	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
206	struct ev_io *w;	280	struct ev_io *w;
207		281
208	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
209	{	283	{
210	int ev = w->events & events;	284	int ev = w->events & events;
211		285
212	if (ev)	286	if (ev)
213	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
214	}	288	}
215	}	289	}
216		290
217	/*****************************************************************************/	291	/*****************************************************************************/
218		292
219	static int *fdchanges;
220	static int fdchangemax, fdchangecnt;
221
222	static void	293	static void
223	fd_reify (void)	294	fd_reify (EV_P)
224	{	295	{
225	int i;	296	int i;
226		297
227	for (i = 0; i < fdchangecnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
228	{	299	{
…		…
230	ANFD *anfd = anfds + fd;	301	ANFD *anfd = anfds + fd;
231	struct ev_io *w;	302	struct ev_io *w;
232		303
233	int events = 0;	304	int events = 0;
234		305
235	for (w = anfd->head; w; w = w->next)	306	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
236	events |= w->events;	307	events |= w->events;
237		308
238	anfd->reify = 0;	309	anfd->reify = 0;
239		310
240	if (anfd->events != events)	311	if (anfd->events != events)
241	{	312	{
242	method_modify (fd, anfd->events, events);	313	method_modify (EV_A_ fd, anfd->events, events);
243	anfd->events = events;	314	anfd->events = events;
244	}	315	}
245	}	316	}
246		317
247	fdchangecnt = 0;	318	fdchangecnt = 0;
248	}	319	}
249		320
250	static void	321	static void
251	fd_change (int fd)	322	fd_change (EV_P_ int fd)
252	{	323	{
253	if (anfds [fd].reify || fdchangecnt < 0)	324	if (anfds [fd].reify || fdchangecnt < 0)
254	return;	325	return;
255		326
256	anfds [fd].reify = 1;	327	anfds [fd].reify = 1;
…		…
258	++fdchangecnt;	329	++fdchangecnt;
259	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
260	fdchanges [fdchangecnt - 1] = fd;	331	fdchanges [fdchangecnt - 1] = fd;
261	}	332	}
262		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
263	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
264	static void	347	static void
265	fd_recheck (void)	348	fd_ebadf (EV_P)
266	{	349	{
267	int fd;	350	int fd;
268		351
269	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
270	if (anfds [fd].events)	353	if (anfds [fd].events)
271	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
272	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)
273	{	366	{
274	ev_io_stop (anfds [fd].head);	367	close (fd);
275	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	368	fd_kill (EV_A_ fd);
		369	return;
276	}	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	}
277	}	386	}
278		387
279	/*****************************************************************************/	388	/*****************************************************************************/
280		389
281	static struct ev_timer **timers;
282	static int timermax, timercnt;
283
284	static struct ev_periodic **periodics;
285	static int periodicmax, periodiccnt;
286
287	static void	390	static void
288	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
289	{	392	{
290	WT w = timers [k];	393	WT w = heap [k];
291		394
292	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
293	{	396	{
294	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
295	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
296	k >>= 1;	399	k >>= 1;
297	}	400	}
298		401
299	timers [k] = w;	402	heap [k] = w;
300	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
301		404
302	}	405	}
303		406
304	static void	407	static void
305	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
306	{	409	{
307	WT w = timers [k];	410	WT w = heap [k];
308		411
309	while (k < (N >> 1))	412	while (k < (N >> 1))
310	{	413	{
311	int j = k << 1;	414	int j = k << 1;
312		415
313	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
314	++j;	417	++j;
315		418
316	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
317	break;	420	break;
318		421
319	timers [k] = timers [j];	422	heap [k] = heap [j];
320	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
321	k = j;	424	k = j;
322	}	425	}
323		426
324	timers [k] = w;	427	heap [k] = w;
325	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
326	}	429	}
327		430
328	/*****************************************************************************/	431	/*****************************************************************************/
329		432
330	typedef struct	433	typedef struct
331	{	434	{
332	struct ev_signal *head;	435	struct ev_watcher_list *head;
333	sig_atomic_t volatile gotsig;	436	sig_atomic_t volatile gotsig;
334	} ANSIG;	437	} ANSIG;
335		438
336	static ANSIG *signals;	439	static ANSIG *signals;
337	static int signalmax;	440	static int signalmax;
…		…
357	{	460	{
358	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
359		462
360	if (!gotsig)	463	if (!gotsig)
361	{	464	{
		465	int old_errno = errno;
362	gotsig = 1;	466	gotsig = 1;
363	write (sigpipe [1], &signum, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
364	}	469	}
365	}	470	}
366		471
367	static void	472	static void
368	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
369	{	474	{
370	struct ev_signal *w;	475	struct ev_watcher_list *w;
371	int signum;	476	int signum;
372		477
373	read (sigpipe [0], &revents, 1);	478	read (sigpipe [0], &revents, 1);
374	gotsig = 0;	479	gotsig = 0;
375		480
…		…
377	if (signals [signum].gotsig)	482	if (signals [signum].gotsig)
378	{	483	{
379	signals [signum].gotsig = 0;	484	signals [signum].gotsig = 0;
380		485
381	for (w = signals [signum].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
382	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
383	}	488	}
384	}	489	}
385		490
386	static void	491	static void
387	siginit (void)	492	siginit (EV_P)
388	{	493	{
		494	#ifndef WIN32
389	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391		497
392	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
393	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
395		502
396	ev_io_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
397	ev_io_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
398	}	506	}
399		507
400	/*****************************************************************************/	508	/*****************************************************************************/
401		509
402	static struct ev_idle **idles;	510	#ifndef WIN32
403	static int idlemax, idlecnt;
404
405	static struct ev_prepare **prepares;
406	static int preparemax, preparecnt;
407
408	static struct ev_check **checks;
409	static int checkmax, checkcnt;
410
411	/*****************************************************************************/
412		511
413	static struct ev_child *childs [PID_HASHSIZE];	512	static struct ev_child *childs [PID_HASHSIZE];
414	static struct ev_signal childev;	513	static struct ev_signal childev;
415		514
416	#ifndef WCONTINUED	515	#ifndef WCONTINUED
417	# define WCONTINUED 0	516	# define WCONTINUED 0
418	#endif	517	#endif
419		518
420	static void	519	static void
421	childcb (struct ev_signal *sw, int revents)	520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
422	{	521	{
423	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	{
424	int pid, status;	537	int pid, status;
425		538
426	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
427	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	540	{
428	if (w->pid == pid || w->pid == -1)	541	/* make sure we are called again until all childs have been reaped */
429	{	542	event (EV_A_ (W)sw, EV_SIGNAL);
430	w->status = status;	543
431	event ((W)w, EV_CHILD);	544	child_reap (EV_A_ sw, pid, pid, status);
432	}	545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
433	}	547	}
		548
		549	#endif
434		550
435	/*****************************************************************************/	551	/*****************************************************************************/
436		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
437	#if EV_USE_EPOLL	556	#if EV_USE_EPOLL
438	# include "ev_epoll.c"	557	# include "ev_epoll.c"
439	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
440	#if EV_USE_SELECT	562	#if EV_USE_SELECT
441	# include "ev_select.c"	563	# include "ev_select.c"
442	#endif	564	#endif
443		565
444	int	566	int
…		…
451	ev_version_minor (void)	573	ev_version_minor (void)
452	{	574	{
453	return EV_VERSION_MINOR;	575	return EV_VERSION_MINOR;
454	}	576	}
455		577
456	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)
457	{	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	{
458	if (!ev_method)	599	if (!method)
459	{	600	{
460	#if EV_USE_MONOTONIC	601	#if EV_USE_MONOTONIC
461	{	602	{
462	struct timespec ts;	603	struct timespec ts;
463	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
464	have_monotonic = 1;	605	have_monotonic = 1;
465	}	606	}
466	#endif	607	#endif
467		608
468	ev_now = ev_time ();	609	rt_now = ev_time ();
469	now = get_clock ();	610	mn_now = get_clock ();
		611	now_floor = mn_now;
470	diff = ev_now - now;	612	rtmn_diff = rt_now - mn_now;
471		613
472	if (pipe (sigpipe))	614	if (methods == EVMETHOD_AUTO)
473	return 0;	615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
474		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
475	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
476	#if EV_USE_EPOLL	627	#if EV_USE_EPOLL
477	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);
478	#endif	632	#endif
479	#if EV_USE_SELECT	633	#if EV_USE_SELECT
480	if (ev_method == EVMETHOD_NONE) select_init (flags);	634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
481	#endif	635	#endif
		636	}
		637	}
482		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	#if EV_USE_WIN32
		643	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		644	#endif
		645	#if EV_USE_KQUEUE
		646	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		647	#endif
		648	#if EV_USE_EPOLL
		649	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_POLL
		652	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		653	#endif
		654	#if EV_USE_SELECT
		655	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		656	#endif
		657
		658	method = 0;
		659	/*TODO*/
		660	}
		661
		662	void
		663	loop_fork (EV_P)
		664	{
		665	/*TODO*/
		666	#if EV_USE_EPOLL
		667	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		668	#endif
		669	#if EV_USE_KQUEUE
		670	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		671	#endif
		672	}
		673
		674	#if EV_MULTIPLICITY
		675	struct ev_loop *
		676	ev_loop_new (int methods)
		677	{
		678	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		679
		680	loop_init (EV_A_ methods);
		681
		682	if (ev_method (EV_A))
		683	return loop;
		684
		685	return 0;
		686	}
		687
		688	void
		689	ev_loop_destroy (EV_P)
		690	{
		691	loop_destroy (EV_A);
		692	free (loop);
		693	}
		694
		695	void
		696	ev_loop_fork (EV_P)
		697	{
		698	loop_fork (EV_A);
		699	}
		700
		701	#endif
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop default_loop_struct;
		705	static struct ev_loop *default_loop;
		706
		707	struct ev_loop *
		708	#else
		709	static int default_loop;
		710
		711	int
		712	#endif
		713	ev_default_loop (int methods)
		714	{
		715	if (sigpipe [0] == sigpipe [1])
		716	if (pipe (sigpipe))
		717	return 0;
		718
		719	if (!default_loop)
		720	{
		721	#if EV_MULTIPLICITY
		722	struct ev_loop *loop = default_loop = &default_loop_struct;
		723	#else
		724	default_loop = 1;
		725	#endif
		726
		727	loop_init (EV_A_ methods);
		728
483	if (ev_method)	729	if (ev_method (EV_A))
484	{	730	{
485	ev_watcher_init (&sigev, sigcb);	731	ev_watcher_init (&sigev, sigcb);
		732	ev_set_priority (&sigev, EV_MAXPRI);
486	siginit ();	733	siginit (EV_A);
487		734
		735	#ifndef WIN32
488	ev_signal_init (&childev, childcb, SIGCHLD);	736	ev_signal_init (&childev, childcb, SIGCHLD);
		737	ev_set_priority (&childev, EV_MAXPRI);
489	ev_signal_start (&childev);	738	ev_signal_start (EV_A_ &childev);
		739	ev_unref (EV_A); /* child watcher should not keep loop alive */
		740	#endif
490	}	741	}
		742	else
		743	default_loop = 0;
491	}	744	}
492		745
493	return ev_method;	746	return default_loop;
494	}	747	}
495		748
496	/*****************************************************************************/
497
498	void	749	void
499	ev_fork_prepare (void)	750	ev_default_destroy (void)
500	{	751	{
501	/* nop */	752	#if EV_MULTIPLICITY
502	}	753	struct ev_loop *loop = default_loop;
503
504	void
505	ev_fork_parent (void)
506	{
507	/* nop */
508	}
509
510	void
511	ev_fork_child (void)
512	{
513	#if EV_USE_EPOLL
514	if (ev_method == EVMETHOD_EPOLL)
515	epoll_postfork_child ();
516	#endif	754	#endif
517		755
		756	ev_ref (EV_A); /* child watcher */
		757	ev_signal_stop (EV_A_ &childev);
		758
		759	ev_ref (EV_A); /* signal watcher */
518	ev_io_stop (&sigev);	760	ev_io_stop (EV_A_ &sigev);
		761
		762	close (sigpipe [0]); sigpipe [0] = 0;
		763	close (sigpipe [1]); sigpipe [1] = 0;
		764
		765	loop_destroy (EV_A);
		766	}
		767
		768	void
		769	ev_default_fork (void)
		770	{
		771	#if EV_MULTIPLICITY
		772	struct ev_loop *loop = default_loop;
		773	#endif
		774
		775	loop_fork (EV_A);
		776
		777	ev_io_stop (EV_A_ &sigev);
519	close (sigpipe [0]);	778	close (sigpipe [0]);
520	close (sigpipe [1]);	779	close (sigpipe [1]);
521	pipe (sigpipe);	780	pipe (sigpipe);
		781
		782	ev_ref (EV_A); /* signal watcher */
522	siginit ();	783	siginit (EV_A);
523	}	784	}
524		785
525	/*****************************************************************************/	786	/*****************************************************************************/
526		787
527	static void	788	static void
528	call_pending (void)	789	call_pending (EV_P)
529	{	790	{
		791	int pri;
		792
		793	for (pri = NUMPRI; pri--; )
530	while (pendingcnt)	794	while (pendingcnt [pri])
531	{	795	{
532	ANPENDING *p = pendings + --pendingcnt;	796	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
533		797
534	if (p->w)	798	if (p->w)
535	{	799	{
536	p->w->pending = 0;	800	p->w->pending = 0;
537	p->w->cb (p->w, p->events);	801
		802	(*(void (**)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
538	}	803	}
539	}	804	}
540	}	805	}
541		806
542	static void	807	static void
543	timers_reify (void)	808	timers_reify (EV_P)
544	{	809	{
545	while (timercnt && timers [0]->at <= now)	810	while (timercnt && ((WT)timers [0])->at <= mn_now)
546	{	811	{
547	struct ev_timer *w = timers [0];	812	struct ev_timer *w = timers [0];
		813
		814	assert (("inactive timer on timer heap detected", ev_is_active (w)));
548		815
549	/* first reschedule or stop timer */	816	/* first reschedule or stop timer */
550	if (w->repeat)	817	if (w->repeat)
551	{	818	{
552	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	819	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
553	w->at = now + w->repeat;	820	((WT)w)->at = mn_now + w->repeat;
554	downheap ((WT *)timers, timercnt, 0);	821	downheap ((WT *)timers, timercnt, 0);
555	}	822	}
556	else	823	else
557	ev_timer_stop (w); /* nonrepeating: stop timer */	824	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
558		825
559	event ((W)w, EV_TIMEOUT);	826	event (EV_A_ (W)w, EV_TIMEOUT);
560	}	827	}
561	}	828	}
562		829
563	static void	830	static void
564	periodics_reify (void)	831	periodics_reify (EV_P)
565	{	832	{
566	while (periodiccnt && periodics [0]->at <= ev_now)	833	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
567	{	834	{
568	struct ev_periodic *w = periodics [0];	835	struct ev_periodic *w = periodics [0];
		836
		837	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
569		838
570	/* first reschedule or stop timer */	839	/* first reschedule or stop timer */
571	if (w->interval)	840	if (w->interval)
572	{	841	{
573	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	842	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
574	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	843	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
575	downheap ((WT *)periodics, periodiccnt, 0);	844	downheap ((WT *)periodics, periodiccnt, 0);
576	}	845	}
577	else	846	else
578	ev_periodic_stop (w); /* nonrepeating: stop timer */	847	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
579		848
580	event ((W)w, EV_PERIODIC);	849	event (EV_A_ (W)w, EV_PERIODIC);
581	}	850	}
582	}	851	}
583		852
584	static void	853	static void
585	periodics_reschedule (ev_tstamp diff)	854	periodics_reschedule (EV_P)
586	{	855	{
587	int i;	856	int i;
588		857
589	/* adjust periodics after time jump */	858	/* adjust periodics after time jump */
590	for (i = 0; i < periodiccnt; ++i)	859	for (i = 0; i < periodiccnt; ++i)
591	{	860	{
592	struct ev_periodic *w = periodics [i];	861	struct ev_periodic *w = periodics [i];
593		862
594	if (w->interval)	863	if (w->interval)
595	{	864	{
596	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	865	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
597		866
598	if (fabs (diff) >= 1e-4)	867	if (fabs (diff) >= 1e-4)
599	{	868	{
600	ev_periodic_stop (w);	869	ev_periodic_stop (EV_A_ w);
601	ev_periodic_start (w);	870	ev_periodic_start (EV_A_ w);
602		871
603	i = 0; /* restart loop, inefficient, but time jumps should be rare */	872	i = 0; /* restart loop, inefficient, but time jumps should be rare */
604	}	873	}
605	}	874	}
606	}	875	}
607	}	876	}
608		877
		878	inline int
		879	time_update_monotonic (EV_P)
		880	{
		881	mn_now = get_clock ();
		882
		883	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		884	{
		885	rt_now = rtmn_diff + mn_now;
		886	return 0;
		887	}
		888	else
		889	{
		890	now_floor = mn_now;
		891	rt_now = ev_time ();
		892	return 1;
		893	}
		894	}
		895
609	static void	896	static void
610	time_update (void)	897	time_update (EV_P)
611	{	898	{
612	int i;	899	int i;
613		900
614	ev_now = ev_time ();	901	#if EV_USE_MONOTONIC
615
616	if (have_monotonic)	902	if (expect_true (have_monotonic))
617	{	903	{
618	ev_tstamp odiff = diff;	904	if (time_update_monotonic (EV_A))
619
620	for (i = 4; --i; ) /* loop a few times, before making important decisions */
621	{	905	{
622	now = get_clock ();	906	ev_tstamp odiff = rtmn_diff;
		907
		908	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		909	{
623	diff = ev_now - now;	910	rtmn_diff = rt_now - mn_now;
624		911
625	if (fabs (odiff - diff) < MIN_TIMEJUMP)	912	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
626	return; /* all is well */	913	return; /* all is well */
627		914
628	ev_now = ev_time ();	915	rt_now = ev_time ();
		916	mn_now = get_clock ();
		917	now_floor = mn_now;
		918	}
		919
		920	periodics_reschedule (EV_A);
		921	/* no timer adjustment, as the monotonic clock doesn't jump */
		922	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
629	}	923	}
630
631	periodics_reschedule (diff - odiff);
632	/* no timer adjustment, as the monotonic clock doesn't jump */
633	}	924	}
634	else	925	else
		926	#endif
635	{	927	{
636	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	928	rt_now = ev_time ();
		929
		930	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
637	{	931	{
638	periodics_reschedule (ev_now - now);	932	periodics_reschedule (EV_A);
639		933
640	/* adjust timers. this is easy, as the offset is the same for all */	934	/* adjust timers. this is easy, as the offset is the same for all */
641	for (i = 0; i < timercnt; ++i)	935	for (i = 0; i < timercnt; ++i)
642	timers [i]->at += diff;	936	((WT)timers [i])->at += rt_now - mn_now;
643	}	937	}
644		938
645	now = ev_now;	939	mn_now = rt_now;
646	}	940	}
647	}	941	}
648		942
649	int ev_loop_done;	943	void
		944	ev_ref (EV_P)
		945	{
		946	++activecnt;
		947	}
650		948
		949	void
		950	ev_unref (EV_P)
		951	{
		952	--activecnt;
		953	}
		954
		955	static int loop_done;
		956
		957	void
651	void ev_loop (int flags)	958	ev_loop (EV_P_ int flags)
652	{	959	{
653	double block;	960	double block;
654	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	961	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
655		962
656	do	963	do
657	{	964	{
658	/* queue check watchers (and execute them) */	965	/* queue check watchers (and execute them) */
659	if (preparecnt)	966	if (expect_false (preparecnt))
660	{	967	{
661	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	968	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662	call_pending ();	969	call_pending (EV_A);
663	}	970	}
664		971
665	/* update fd-related kernel structures */	972	/* update fd-related kernel structures */
666	fd_reify ();	973	fd_reify (EV_A);
667		974
668	/* calculate blocking time */	975	/* calculate blocking time */
669		976
670	/* we only need this for !monotonic clockor timers, but as we basically	977	/* we only need this for !monotonic clockor timers, but as we basically
671	always have timers, we just calculate it always */	978	always have timers, we just calculate it always */
		979	#if EV_USE_MONOTONIC
		980	if (expect_true (have_monotonic))
		981	time_update_monotonic (EV_A);
		982	else
		983	#endif
		984	{
672	ev_now = ev_time ();	985	rt_now = ev_time ();
		986	mn_now = rt_now;
		987	}
673		988
674	if (flags & EVLOOP_NONBLOCK || idlecnt)	989	if (flags & EVLOOP_NONBLOCK || idlecnt)
675	block = 0.;	990	block = 0.;
676	else	991	else
677	{	992	{
678	block = MAX_BLOCKTIME;	993	block = MAX_BLOCKTIME;
679		994
680	if (timercnt)	995	if (timercnt)
681	{	996	{
682	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	997	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
683	if (block > to) block = to;	998	if (block > to) block = to;
684	}	999	}
685		1000
686	if (periodiccnt)	1001	if (periodiccnt)
687	{	1002	{
688	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1003	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
689	if (block > to) block = to;	1004	if (block > to) block = to;
690	}	1005	}
691		1006
692	if (block < 0.) block = 0.;	1007	if (block < 0.) block = 0.;
693	}	1008	}
694		1009
695	method_poll (block);	1010	method_poll (EV_A_ block);
696		1011
697	/* update ev_now, do magic */	1012	/* update rt_now, do magic */
698	time_update ();	1013	time_update (EV_A);
699		1014
700	/* queue pending timers and reschedule them */	1015	/* queue pending timers and reschedule them */
701	timers_reify (); /* relative timers called last */	1016	timers_reify (EV_A); /* relative timers called last */
702	periodics_reify (); /* absolute timers called first */	1017	periodics_reify (EV_A); /* absolute timers called first */
703		1018
704	/* queue idle watchers unless io or timers are pending */	1019	/* queue idle watchers unless io or timers are pending */
705	if (!pendingcnt)	1020	if (!pendingcnt)
706	queue_events ((W *)idles, idlecnt, EV_IDLE);	1021	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
707		1022
708	/* queue check watchers, to be executed first */	1023	/* queue check watchers, to be executed first */
709	if (checkcnt)	1024	if (checkcnt)
710	queue_events ((W *)checks, checkcnt, EV_CHECK);	1025	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711		1026
712	call_pending ();	1027	call_pending (EV_A);
713	}	1028	}
714	while (!ev_loop_done);	1029	while (activecnt && !loop_done);
715		1030
716	if (ev_loop_done != 2)	1031	if (loop_done != 2)
717	ev_loop_done = 0;	1032	loop_done = 0;
		1033	}
		1034
		1035	void
		1036	ev_unloop (EV_P_ int how)
		1037	{
		1038	loop_done = how;
718	}	1039	}
719		1040
720	/*****************************************************************************/	1041	/*****************************************************************************/
721		1042
722	static void	1043	inline void
723	wlist_add (WL *head, WL elem)	1044	wlist_add (WL *head, WL elem)
724	{	1045	{
725	elem->next = *head;	1046	elem->next = *head;
726	*head = elem;	1047	*head = elem;
727	}	1048	}
728		1049
729	static void	1050	inline void
730	wlist_del (WL *head, WL elem)	1051	wlist_del (WL *head, WL elem)
731	{	1052	{
732	while (*head)	1053	while (*head)
733	{	1054	{
734	if (*head == elem)	1055	if (*head == elem)
…		…
739		1060
740	head = &(*head)->next;	1061	head = &(*head)->next;
741	}	1062	}
742	}	1063	}
743		1064
744	static void	1065	inline void
745	ev_clear_pending (W w)	1066	ev_clear_pending (EV_P_ W w)
746	{	1067	{
747	if (w->pending)	1068	if (w->pending)
748	{	1069	{
749	pendings [w->pending - 1].w = 0;	1070	pendings [ABSPRI (w)][w->pending - 1].w = 0;
750	w->pending = 0;	1071	w->pending = 0;
751	}	1072	}
752	}	1073	}
753		1074
754	static void	1075	inline void
755	ev_start (W w, int active)	1076	ev_start (EV_P_ W w, int active)
756	{	1077	{
		1078	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1079	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1080
757	w->active = active;	1081	w->active = active;
		1082	ev_ref (EV_A);
758	}	1083	}
759		1084
760	static void	1085	inline void
761	ev_stop (W w)	1086	ev_stop (EV_P_ W w)
762	{	1087	{
		1088	ev_unref (EV_A);
763	w->active = 0;	1089	w->active = 0;
764	}	1090	}
765		1091
766	/*****************************************************************************/	1092	/*****************************************************************************/
767		1093
768	void	1094	void
769	ev_io_start (struct ev_io *w)	1095	ev_io_start (EV_P_ struct ev_io *w)
770	{	1096	{
771	int fd = w->fd;	1097	int fd = w->fd;
772		1098
773	if (ev_is_active (w))	1099	if (ev_is_active (w))
774	return;	1100	return;
775		1101
776	assert (("ev_io_start called with negative fd", fd >= 0));	1102	assert (("ev_io_start called with negative fd", fd >= 0));
777		1103
778	ev_start ((W)w, 1);	1104	ev_start (EV_A_ (W)w, 1);
779	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1105	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
780	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1106	wlist_add ((WL *)&anfds[fd].head, (WL)w);
781		1107
782	fd_change (fd);	1108	fd_change (EV_A_ fd);
783	}	1109	}
784		1110
785	void	1111	void
786	ev_io_stop (struct ev_io *w)	1112	ev_io_stop (EV_P_ struct ev_io *w)
787	{	1113	{
788	ev_clear_pending ((W)w);	1114	ev_clear_pending (EV_A_ (W)w);
789	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
790	return;	1116	return;
791		1117
792	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1118	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
793	ev_stop ((W)w);	1119	ev_stop (EV_A_ (W)w);
794		1120
795	fd_change (w->fd);	1121	fd_change (EV_A_ w->fd);
796	}	1122	}
797		1123
798	void	1124	void
799	ev_timer_start (struct ev_timer *w)	1125	ev_timer_start (EV_P_ struct ev_timer *w)
800	{	1126	{
801	if (ev_is_active (w))	1127	if (ev_is_active (w))
802	return;	1128	return;
803		1129
804	w->at += now;	1130	((WT)w)->at += mn_now;
805		1131
806	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1132	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807		1133
808	ev_start ((W)w, ++timercnt);	1134	ev_start (EV_A_ (W)w, ++timercnt);
809	array_needsize (timers, timermax, timercnt, );	1135	array_needsize (timers, timermax, timercnt, );
810	timers [timercnt - 1] = w;	1136	timers [timercnt - 1] = w;
811	upheap ((WT *)timers, timercnt - 1);	1137	upheap ((WT *)timers, timercnt - 1);
812	}
813		1138
		1139	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1140	}
		1141
814	void	1142	void
815	ev_timer_stop (struct ev_timer *w)	1143	ev_timer_stop (EV_P_ struct ev_timer *w)
816	{	1144	{
817	ev_clear_pending ((W)w);	1145	ev_clear_pending (EV_A_ (W)w);
818	if (!ev_is_active (w))	1146	if (!ev_is_active (w))
819	return;	1147	return;
820		1148
		1149	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1150
821	if (w->active < timercnt--)	1151	if (((W)w)->active < timercnt--)
822	{	1152	{
823	timers [w->active - 1] = timers [timercnt];	1153	timers [((W)w)->active - 1] = timers [timercnt];
824	downheap ((WT *)timers, timercnt, w->active - 1);	1154	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
825	}	1155	}
826		1156
827	w->at = w->repeat;	1157	((WT)w)->at = w->repeat;
828		1158
829	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
830	}	1160	}
831		1161
832	void	1162	void
833	ev_timer_again (struct ev_timer *w)	1163	ev_timer_again (EV_P_ struct ev_timer *w)
834	{	1164	{
835	if (ev_is_active (w))	1165	if (ev_is_active (w))
836	{	1166	{
837	if (w->repeat)	1167	if (w->repeat)
838	{	1168	{
839	w->at = now + w->repeat;	1169	((WT)w)->at = mn_now + w->repeat;
840	downheap ((WT *)timers, timercnt, w->active - 1);	1170	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
841	}	1171	}
842	else	1172	else
843	ev_timer_stop (w);	1173	ev_timer_stop (EV_A_ w);
844	}	1174	}
845	else if (w->repeat)	1175	else if (w->repeat)
846	ev_timer_start (w);	1176	ev_timer_start (EV_A_ w);
847	}	1177	}
848		1178
849	void	1179	void
850	ev_periodic_start (struct ev_periodic *w)	1180	ev_periodic_start (EV_P_ struct ev_periodic *w)
851	{	1181	{
852	if (ev_is_active (w))	1182	if (ev_is_active (w))
853	return;	1183	return;
854		1184
855	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1185	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
856		1186
857	/* this formula differs from the one in periodic_reify because we do not always round up */	1187	/* this formula differs from the one in periodic_reify because we do not always round up */
858	if (w->interval)	1188	if (w->interval)
859	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1189	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
860		1190
861	ev_start ((W)w, ++periodiccnt);	1191	ev_start (EV_A_ (W)w, ++periodiccnt);
862	array_needsize (periodics, periodicmax, periodiccnt, );	1192	array_needsize (periodics, periodicmax, periodiccnt, );
863	periodics [periodiccnt - 1] = w;	1193	periodics [periodiccnt - 1] = w;
864	upheap ((WT *)periodics, periodiccnt - 1);	1194	upheap ((WT *)periodics, periodiccnt - 1);
865	}
866		1195
		1196	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1197	}
		1198
867	void	1199	void
868	ev_periodic_stop (struct ev_periodic *w)	1200	ev_periodic_stop (EV_P_ struct ev_periodic *w)
869	{	1201	{
870	ev_clear_pending ((W)w);	1202	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1203	if (!ev_is_active (w))
872	return;	1204	return;
873		1205
		1206	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1207
874	if (w->active < periodiccnt--)	1208	if (((W)w)->active < periodiccnt--)
875	{	1209	{
876	periodics [w->active - 1] = periodics [periodiccnt];	1210	periodics [((W)w)->active - 1] = periodics [periodiccnt];
877	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1211	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
878	}	1212	}
879		1213
880	ev_stop ((W)w);	1214	ev_stop (EV_A_ (W)w);
881	}	1215	}
882		1216
883	void	1217	void
884	ev_signal_start (struct ev_signal *w)	1218	ev_idle_start (EV_P_ struct ev_idle *w)
885	{	1219	{
886	if (ev_is_active (w))	1220	if (ev_is_active (w))
887	return;	1221	return;
888		1222
		1223	ev_start (EV_A_ (W)w, ++idlecnt);
		1224	array_needsize (idles, idlemax, idlecnt, );
		1225	idles [idlecnt - 1] = w;
		1226	}
		1227
		1228	void
		1229	ev_idle_stop (EV_P_ struct ev_idle *w)
		1230	{
		1231	ev_clear_pending (EV_A_ (W)w);
		1232	if (ev_is_active (w))
		1233	return;
		1234
		1235	idles [((W)w)->active - 1] = idles [--idlecnt];
		1236	ev_stop (EV_A_ (W)w);
		1237	}
		1238
		1239	void
		1240	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1241	{
		1242	if (ev_is_active (w))
		1243	return;
		1244
		1245	ev_start (EV_A_ (W)w, ++preparecnt);
		1246	array_needsize (prepares, preparemax, preparecnt, );
		1247	prepares [preparecnt - 1] = w;
		1248	}
		1249
		1250	void
		1251	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1252	{
		1253	ev_clear_pending (EV_A_ (W)w);
		1254	if (ev_is_active (w))
		1255	return;
		1256
		1257	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1258	ev_stop (EV_A_ (W)w);
		1259	}
		1260
		1261	void
		1262	ev_check_start (EV_P_ struct ev_check *w)
		1263	{
		1264	if (ev_is_active (w))
		1265	return;
		1266
		1267	ev_start (EV_A_ (W)w, ++checkcnt);
		1268	array_needsize (checks, checkmax, checkcnt, );
		1269	checks [checkcnt - 1] = w;
		1270	}
		1271
		1272	void
		1273	ev_check_stop (EV_P_ struct ev_check *w)
		1274	{
		1275	ev_clear_pending (EV_A_ (W)w);
		1276	if (ev_is_active (w))
		1277	return;
		1278
		1279	checks [((W)w)->active - 1] = checks [--checkcnt];
		1280	ev_stop (EV_A_ (W)w);
		1281	}
		1282
		1283	#ifndef SA_RESTART
		1284	# define SA_RESTART 0
		1285	#endif
		1286
		1287	void
		1288	ev_signal_start (EV_P_ struct ev_signal *w)
		1289	{
		1290	#if EV_MULTIPLICITY
		1291	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1292	#endif
		1293	if (ev_is_active (w))
		1294	return;
		1295
889	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1296	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
890		1297
891	ev_start ((W)w, 1);	1298	ev_start (EV_A_ (W)w, 1);
892	array_needsize (signals, signalmax, w->signum, signals_init);	1299	array_needsize (signals, signalmax, w->signum, signals_init);
893	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1300	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
894		1301
895	if (!w->next)	1302	if (!((WL)w)->next)
896	{	1303	{
897	struct sigaction sa;	1304	struct sigaction sa;
898	sa.sa_handler = sighandler;	1305	sa.sa_handler = sighandler;
899	sigfillset (&sa.sa_mask);	1306	sigfillset (&sa.sa_mask);
900	sa.sa_flags = 0;	1307	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901	sigaction (w->signum, &sa, 0);	1308	sigaction (w->signum, &sa, 0);
902	}	1309	}
903	}	1310	}
904		1311
905	void	1312	void
906	ev_signal_stop (struct ev_signal *w)	1313	ev_signal_stop (EV_P_ struct ev_signal *w)
907	{	1314	{
908	ev_clear_pending ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
909	if (!ev_is_active (w))	1316	if (!ev_is_active (w))
910	return;	1317	return;
911		1318
912	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1319	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
913	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
914		1321
915	if (!signals [w->signum - 1].head)	1322	if (!signals [w->signum - 1].head)
916	signal (w->signum, SIG_DFL);	1323	signal (w->signum, SIG_DFL);
917	}	1324	}
918		1325
919	void	1326	void
920	ev_idle_start (struct ev_idle *w)	1327	ev_child_start (EV_P_ struct ev_child *w)
921	{	1328	{
		1329	#if EV_MULTIPLICITY
		1330	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1331	#endif
922	if (ev_is_active (w))	1332	if (ev_is_active (w))
923	return;	1333	return;
924		1334
925	ev_start ((W)w, ++idlecnt);	1335	ev_start (EV_A_ (W)w, 1);
926	array_needsize (idles, idlemax, idlecnt, );	1336	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
927	idles [idlecnt - 1] = w;
928	}	1337	}
929		1338
930	void	1339	void
931	ev_idle_stop (struct ev_idle *w)	1340	ev_child_stop (EV_P_ struct ev_child *w)
932	{	1341	{
933	ev_clear_pending ((W)w);	1342	ev_clear_pending (EV_A_ (W)w);
934	if (ev_is_active (w))	1343	if (ev_is_active (w))
935	return;	1344	return;
936		1345
937	idles [w->active - 1] = idles [--idlecnt];
938	ev_stop ((W)w);
939	}
940
941	void
942	ev_prepare_start (struct ev_prepare *w)
943	{
944	if (ev_is_active (w))
945	return;
946
947	ev_start ((W)w, ++preparecnt);
948	array_needsize (prepares, preparemax, preparecnt, );
949	prepares [preparecnt - 1] = w;
950	}
951
952	void
953	ev_prepare_stop (struct ev_prepare *w)
954	{
955	ev_clear_pending ((W)w);
956	if (ev_is_active (w))
957	return;
958
959	prepares [w->active - 1] = prepares [--preparecnt];
960	ev_stop ((W)w);
961	}
962
963	void
964	ev_check_start (struct ev_check *w)
965	{
966	if (ev_is_active (w))
967	return;
968
969	ev_start ((W)w, ++checkcnt);
970	array_needsize (checks, checkmax, checkcnt, );
971	checks [checkcnt - 1] = w;
972	}
973
974	void
975	ev_check_stop (struct ev_check *w)
976	{
977	ev_clear_pending ((W)w);
978	if (ev_is_active (w))
979	return;
980
981	checks [w->active - 1] = checks [--checkcnt];
982	ev_stop ((W)w);
983	}
984
985	void
986	ev_child_start (struct ev_child *w)
987	{
988	if (ev_is_active (w))
989	return;
990
991	ev_start ((W)w, 1);
992	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
993	}
994
995	void
996	ev_child_stop (struct ev_child *w)
997	{
998	ev_clear_pending ((W)w);
999	if (ev_is_active (w))
1000	return;
1001
1002	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1346	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1003	ev_stop ((W)w);	1347	ev_stop (EV_A_ (W)w);
1004	}	1348	}
1005		1349
1006	/*****************************************************************************/	1350	/*****************************************************************************/
1007		1351
1008	struct ev_once	1352	struct ev_once
…		…
1012	void (*cb)(int revents, void *arg);	1356	void (*cb)(int revents, void *arg);
1013	void *arg;	1357	void *arg;
1014	};	1358	};
1015		1359
1016	static void	1360	static void
1017	once_cb (struct ev_once *once, int revents)	1361	once_cb (EV_P_ struct ev_once *once, int revents)
1018	{	1362	{
1019	void (*cb)(int revents, void *arg) = once->cb;	1363	void (*cb)(int revents, void *arg) = once->cb;
1020	void *arg = once->arg;	1364	void *arg = once->arg;
1021		1365
1022	ev_io_stop (&once->io);	1366	ev_io_stop (EV_A_ &once->io);
1023	ev_timer_stop (&once->to);	1367	ev_timer_stop (EV_A_ &once->to);
1024	free (once);	1368	free (once);
1025		1369
1026	cb (revents, arg);	1370	cb (revents, arg);
1027	}	1371	}
1028		1372
1029	static void	1373	static void
1030	once_cb_io (struct ev_io *w, int revents)	1374	once_cb_io (EV_P_ struct ev_io *w, int revents)
1031	{	1375	{
1032	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1376	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1033	}	1377	}
1034		1378
1035	static void	1379	static void
1036	once_cb_to (struct ev_timer *w, int revents)	1380	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1037	{	1381	{
1038	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1382	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1039	}	1383	}
1040		1384
1041	void	1385	void
1042	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1386	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1043	{	1387	{
1044	struct ev_once *once = malloc (sizeof (struct ev_once));	1388	struct ev_once *once = malloc (sizeof (struct ev_once));
1045		1389
1046	if (!once)	1390	if (!once)
1047	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1391	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1052		1396
1053	ev_watcher_init (&once->io, once_cb_io);	1397	ev_watcher_init (&once->io, once_cb_io);
1054	if (fd >= 0)	1398	if (fd >= 0)
1055	{	1399	{
1056	ev_io_set (&once->io, fd, events);	1400	ev_io_set (&once->io, fd, events);
1057	ev_io_start (&once->io);	1401	ev_io_start (EV_A_ &once->io);
1058	}	1402	}
1059		1403
1060	ev_watcher_init (&once->to, once_cb_to);	1404	ev_watcher_init (&once->to, once_cb_to);
1061	if (timeout >= 0.)	1405	if (timeout >= 0.)
1062	{	1406	{
1063	ev_timer_set (&once->to, timeout, 0.);	1407	ev_timer_set (&once->to, timeout, 0.);
1064	ev_timer_start (&once->to);	1408	ev_timer_start (EV_A_ &once->to);
1065	}	1409	}
1066	}	1410	}
1067	}	1411	}
1068		1412
1069	/*****************************************************************************/
1070
1071	#if 0
1072
1073	struct ev_io wio;
1074
1075	static void
1076	sin_cb (struct ev_io *w, int revents)
1077	{
1078	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1079	}
1080
1081	static void
1082	ocb (struct ev_timer *w, int revents)
1083	{
1084	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1085	ev_timer_stop (w);
1086	ev_timer_start (w);
1087	}
1088
1089	static void
1090	scb (struct ev_signal *w, int revents)
1091	{
1092	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1093	ev_io_stop (&wio);
1094	ev_io_start (&wio);
1095	}
1096
1097	static void
1098	gcb (struct ev_signal *w, int revents)
1099	{
1100	fprintf (stderr, "generic %x\n", revents);
1101
1102	}
1103
1104	int main (void)
1105	{
1106	ev_init (0);
1107
1108	ev_io_init (&wio, sin_cb, 0, EV_READ);
1109	ev_io_start (&wio);
1110
1111	struct ev_timer t[10000];
1112
1113	#if 0
1114	int i;
1115	for (i = 0; i < 10000; ++i)
1116	{
1117	struct ev_timer *w = t + i;
1118	ev_watcher_init (w, ocb, i);
1119	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1120	ev_timer_start (w);
1121	if (drand48 () < 0.5)
1122	ev_timer_stop (w);
1123	}
1124	#endif
1125
1126	struct ev_timer t1;
1127	ev_timer_init (&t1, ocb, 5, 10);
1128	ev_timer_start (&t1);
1129
1130	struct ev_signal sig;
1131	ev_signal_init (&sig, scb, SIGQUIT);
1132	ev_signal_start (&sig);
1133
1134	struct ev_check cw;
1135	ev_check_init (&cw, gcb);
1136	ev_check_start (&cw);
1137
1138	struct ev_idle iw;
1139	ev_idle_init (&iw, gcb);
1140	ev_idle_start (&iw);
1141
1142	ev_loop (0);
1143
1144	return 0;
1145	}
1146
1147	#endif
1148
1149
1150
1151

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