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Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.60 by root, Sun Nov 4 18:29:44 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
51	/**/	75	/**/
52		76
…		…
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
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
63	#endif	95	#endif
64		96
65	#ifndef EV_USE_REALTIME	97	#ifndef EV_USE_REALTIME
66	# define EV_USE_REALTIME 1	98	# define EV_USE_REALTIME 1
67	#endif	99	#endif
…		…
96	#endif	128	#endif
97		129
98	#define expect_false(expr) expect ((expr) != 0, 0)	130	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	131	#define expect_true(expr) expect ((expr) != 0, 1)
100		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		135
101	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
104		139
105	static ev_tstamp now_floor, now, diff; /* monotonic clock */	140	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
106	ev_tstamp ev_now;
107	int ev_method;
108
109	static int have_monotonic; /* runtime */
110
111	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
112	static void (*method_modify)(int fd, int oev, int nev);
113	static void (*method_poll)(ev_tstamp timeout);
114		141
115	/*****************************************************************************/	142	/*****************************************************************************/
116		143
117	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
118	ev_time (void)	178	ev_time (void)
119	{	179	{
120	#if EV_USE_REALTIME	180	#if EV_USE_REALTIME
121	struct timespec ts;	181	struct timespec ts;
122	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
…		…
126	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
127	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
128	#endif	188	#endif
129	}	189	}
130		190
131	static ev_tstamp	191	inline ev_tstamp
132	get_clock (void)	192	get_clock (void)
133	{	193	{
134	#if EV_USE_MONOTONIC	194	#if EV_USE_MONOTONIC
135	if (expect_true (have_monotonic))	195	if (expect_true (have_monotonic))
136	{	196	{
…		…
139	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
140	}	200	}
141	#endif	201	#endif
142		202
143	return ev_time ();	203	return ev_time ();
		204	}
		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
144	}	210	}
145		211
146	#define array_roundsize(base,n) ((n) | 4 & ~3)	212	#define array_roundsize(base,n) ((n) | 4 & ~3)
147		213
148	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
…		…
160	cur = newcnt; \	226	cur = newcnt; \
161	}	227	}
162		228
163	/*****************************************************************************/	229	/*****************************************************************************/
164		230
165	typedef struct
166	{
167	struct ev_io *head;
168	unsigned char events;
169	unsigned char reify;
170	} ANFD;
171
172	static ANFD *anfds;
173	static int anfdmax;
174
175	static void	231	static void
176	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
177	{	233	{
178	while (count--)	234	while (count--)
179	{	235	{
…		…
183		239
184	++base;	240	++base;
185	}	241	}
186	}	242	}
187		243
188	typedef struct
189	{
190	W w;
191	int events;
192	} ANPENDING;
193
194	static ANPENDING *pendings;
195	static int pendingmax, pendingcnt;
196
197	static void	244	static void
198	event (W w, int events)	245	event (EV_P_ W w, int events)
199	{	246	{
200	if (w->pending)	247	if (w->pending)
201	{	248	{
202	pendings [w->pending - 1].events |= events;	249	pendings [ABSPRI (w)][w->pending - 1].events |= events;
203	return;	250	return;
204	}	251	}
205		252
206	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
207	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
208	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
209	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
210	}	257	}
211		258
212	static void	259	static void
213	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
214	{	261	{
215	int i;	262	int i;
216		263
217	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
218	event (events [i], type);	265	event (EV_A_ events [i], type);
219	}	266	}
220		267
221	static void	268	static void
222	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
223	{	270	{
224	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
225	struct ev_io *w;	272	struct ev_io *w;
226		273
227	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
228	{	275	{
229	int ev = w->events & events;	276	int ev = w->events & events;
230		277
231	if (ev)	278	if (ev)
232	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
233	}	280	}
234	}	281	}
235		282
236	/*****************************************************************************/	283	/*****************************************************************************/
237		284
238	static int *fdchanges;
239	static int fdchangemax, fdchangecnt;
240
241	static void	285	static void
242	fd_reify (void)	286	fd_reify (EV_P)
243	{	287	{
244	int i;	288	int i;
245		289
246	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
247	{	291	{
…		…
249	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	294	struct ev_io *w;
251		295
252	int events = 0;	296	int events = 0;
253		297
254	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
255	events |= w->events;	299	events |= w->events;
256		300
257	anfd->reify = 0;	301	anfd->reify = 0;
258		302
259	if (anfd->events != events)	303	if (anfd->events != events)
260	{	304	{
261	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
262	anfd->events = events;	306	anfd->events = events;
263	}	307	}
264	}	308	}
265		309
266	fdchangecnt = 0;	310	fdchangecnt = 0;
267	}	311	}
268		312
269	static void	313	static void
270	fd_change (int fd)	314	fd_change (EV_P_ int fd)
271	{	315	{
272	if (anfds [fd].reify || fdchangecnt < 0)	316	if (anfds [fd].reify || fdchangecnt < 0)
273	return;	317	return;
274		318
275	anfds [fd].reify = 1;	319	anfds [fd].reify = 1;
…		…
277	++fdchangecnt;	321	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
279	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
280	}	324	}
281		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		335	}
		336	}
		337
282	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
283	static void	339	static void
284	fd_recheck (void)	340	fd_ebadf (EV_P)
285	{	341	{
286	int fd;	342	int fd;
287		343
288	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	345	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
291	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
292	{	358	{
293	ev_io_stop (anfds [fd].head);	359	close (fd);
294	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	360	fd_kill (EV_A_ fd);
		361	return;
295	}	362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
296	}	378	}
297		379
298	/*****************************************************************************/	380	/*****************************************************************************/
299		381
300	static struct ev_timer **timers;
301	static int timermax, timercnt;
302
303	static struct ev_periodic **periodics;
304	static int periodicmax, periodiccnt;
305
306	static void	382	static void
307	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
308	{	384	{
309	WT w = timers [k];	385	WT w = heap [k];
310		386
311	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
312	{	388	{
313	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
314	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
315	k >>= 1;	391	k >>= 1;
316	}	392	}
317		393
318	timers [k] = w;	394	heap [k] = w;
319	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
320		396
321	}	397	}
322		398
323	static void	399	static void
324	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
325	{	401	{
326	WT w = timers [k];	402	WT w = heap [k];
327		403
328	while (k < (N >> 1))	404	while (k < (N >> 1))
329	{	405	{
330	int j = k << 1;	406	int j = k << 1;
331		407
332	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
333	++j;	409	++j;
334		410
335	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
336	break;	412	break;
337		413
338	timers [k] = timers [j];	414	heap [k] = heap [j];
339	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
340	k = j;	416	k = j;
341	}	417	}
342		418
343	timers [k] = w;	419	heap [k] = w;
344	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
345	}	421	}
346		422
347	/*****************************************************************************/	423	/*****************************************************************************/
348		424
349	typedef struct	425	typedef struct
350	{	426	{
351	struct ev_signal *head;	427	struct ev_watcher_list *head;
352	sig_atomic_t volatile gotsig;	428	sig_atomic_t volatile gotsig;
353	} ANSIG;	429	} ANSIG;
354		430
355	static ANSIG *signals;	431	static ANSIG *signals;
356	static int signalmax;	432	static int signalmax;
…		…
376	{	452	{
377	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
378		454
379	if (!gotsig)	455	if (!gotsig)
380	{	456	{
		457	int old_errno = errno;
381	gotsig = 1;	458	gotsig = 1;
382	write (sigpipe [1], &signum, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
383	}	461	}
384	}	462	}
385		463
386	static void	464	static void
387	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
388	{	466	{
389	struct ev_signal *w;	467	struct ev_watcher_list *w;
390	int signum;	468	int signum;
391		469
392	read (sigpipe [0], &revents, 1);	470	read (sigpipe [0], &revents, 1);
393	gotsig = 0;	471	gotsig = 0;
394		472
…		…
396	if (signals [signum].gotsig)	474	if (signals [signum].gotsig)
397	{	475	{
398	signals [signum].gotsig = 0;	476	signals [signum].gotsig = 0;
399		477
400	for (w = signals [signum].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
401	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
402	}	480	}
403	}	481	}
404		482
405	static void	483	static void
406	siginit (void)	484	siginit (EV_P)
407	{	485	{
		486	#ifndef WIN32
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410		489
411	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
414		494
415	ev_io_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
417	}	498	}
418		499
419	/*****************************************************************************/	500	/*****************************************************************************/
420		501
421	static struct ev_idle **idles;	502	#ifndef WIN32
422	static int idlemax, idlecnt;
423
424	static struct ev_prepare **prepares;
425	static int preparemax, preparecnt;
426
427	static struct ev_check **checks;
428	static int checkmax, checkcnt;
429
430	/*****************************************************************************/
431		503
432	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
433	static struct ev_signal childev;	505	static struct ev_signal childev;
434		506
435	#ifndef WCONTINUED	507	#ifndef WCONTINUED
436	# define WCONTINUED 0	508	# define WCONTINUED 0
437	#endif	509	#endif
438		510
439	static void	511	static void
440	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
441	{	513	{
442	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		517	if (w->pid == pid || !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it *now* */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
443	int pid, status;	529	int pid, status;
444		530
445	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
447	if (w->pid == pid || !w->pid)	533	/* make sure we are called again until all childs have been reaped */
448	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
449	w->status = status;	535
450	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
451	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
452	}	539	}
		540
		541	#endif
453		542
454	/*****************************************************************************/	543	/*****************************************************************************/
455		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
456	#if EV_USE_EPOLL	548	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	549	# include "ev_epoll.c"
458	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
459	#if EV_USE_SELECT	554	#if EV_USE_SELECT
460	# include "ev_select.c"	555	# include "ev_select.c"
461	#endif	556	#endif
462		557
463	int	558	int
…		…
470	ev_version_minor (void)	565	ev_version_minor (void)
471	{	566	{
472	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
473	}	568	}
474		569
475	int ev_init (int flags)	570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
476	{	573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	|| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
477	if (!ev_method)	591	if (!method)
478	{	592	{
479	#if EV_USE_MONOTONIC	593	#if EV_USE_MONOTONIC
480	{	594	{
481	struct timespec ts;	595	struct timespec ts;
482	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
483	have_monotonic = 1;	597	have_monotonic = 1;
484	}	598	}
485	#endif	599	#endif
486		600
487	ev_now = ev_time ();	601	rt_now = ev_time ();
488	now = get_clock ();	602	mn_now = get_clock ();
489	now_floor = now;	603	now_floor = mn_now;
490	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
491		605
492	if (pipe (sigpipe))	606	if (methods == EVMETHOD_AUTO)
493	return 0;	607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
494		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
495	ev_method = EVMETHOD_NONE;	610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
496	#if EV_USE_EPOLL	616	#if EV_USE_EPOLL
497	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
498	#endif	621	#endif
499	#if EV_USE_SELECT	622	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
501	#endif	624	#endif
		625	}
		626	}
502		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/*TODO*/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/*TODO*/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
		702	if (pipe (sigpipe))
		703	return 0;
		704
		705	if (!default_loop)
		706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
503	if (ev_method)	715	if (ev_method (EV_A))
504	{	716	{
505	ev_watcher_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
506	siginit ();	719	siginit (EV_A);
507		720
		721	#ifndef WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
509	ev_signal_start (&childev);	724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
510	}	727	}
		728	else
		729	default_loop = 0;
511	}	730	}
512		731
513	return ev_method;	732	return default_loop;
514	}	733	}
515		734
516	/*****************************************************************************/
517
518	void	735	void
519	ev_fork_prepare (void)	736	ev_default_destroy (void)
520	{	737	{
521	/* nop */	738	#if EV_MULTIPLICITY
522	}	739	struct ev_loop *loop = default_loop;
523
524	void
525	ev_fork_parent (void)
526	{
527	/* nop */
528	}
529
530	void
531	ev_fork_child (void)
532	{
533	#if EV_USE_EPOLL
534	if (ev_method == EVMETHOD_EPOLL)
535	epoll_postfork_child ();
536	#endif	740	#endif
537		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
538	ev_io_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
539	close (sigpipe [0]);	764	close (sigpipe [0]);
540	close (sigpipe [1]);	765	close (sigpipe [1]);
541	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
542	siginit ();	769	siginit (EV_A);
543	}	770	}
544		771
545	/*****************************************************************************/	772	/*****************************************************************************/
546		773
547	static void	774	static void
548	call_pending (void)	775	call_pending (EV_P)
549	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	780	while (pendingcnt [pri])
551	{	781	{
552	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		783
554	if (p->w)	784	if (p->w)
555	{	785	{
556	p->w->pending = 0;	786	p->w->pending = 0;
557	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
558	}	788	}
559	}	789	}
560	}	790	}
561		791
562	static void	792	static void
563	timers_reify (void)	793	timers_reify (EV_P)
564	{	794	{
565	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
566	{	796	{
567	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
568		798
569	/* first reschedule or stop timer */	799	/* first reschedule or stop timer */
570	if (w->repeat)	800	if (w->repeat)
571	{	801	{
572	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	802	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
573	w->at = now + w->repeat;	803	w->at = mn_now + w->repeat;
574	downheap ((WT *)timers, timercnt, 0);	804	downheap ((WT *)timers, timercnt, 0);
575	}	805	}
576	else	806	else
577	ev_timer_stop (w); /* nonrepeating: stop timer */	807	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
578		808
579	event ((W)w, EV_TIMEOUT);	809	event (EV_A_ (W)w, EV_TIMEOUT);
580	}	810	}
581	}	811	}
582		812
583	static void	813	static void
584	periodics_reify (void)	814	periodics_reify (EV_P)
585	{	815	{
586	while (periodiccnt && periodics [0]->at <= ev_now)	816	while (periodiccnt && periodics [0]->at <= rt_now)
587	{	817	{
588	struct ev_periodic *w = periodics [0];	818	struct ev_periodic *w = periodics [0];
589		819
590	/* first reschedule or stop timer */	820	/* first reschedule or stop timer */
591	if (w->interval)	821	if (w->interval)
592	{	822	{
593	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	823	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
594	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	824	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
595	downheap ((WT *)periodics, periodiccnt, 0);	825	downheap ((WT *)periodics, periodiccnt, 0);
596	}	826	}
597	else	827	else
598	ev_periodic_stop (w); /* nonrepeating: stop timer */	828	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
599		829
600	event ((W)w, EV_PERIODIC);	830	event (EV_A_ (W)w, EV_PERIODIC);
601	}	831	}
602	}	832	}
603		833
604	static void	834	static void
605	periodics_reschedule (ev_tstamp diff)	835	periodics_reschedule (EV_P)
606	{	836	{
607	int i;	837	int i;
608		838
609	/* adjust periodics after time jump */	839	/* adjust periodics after time jump */
610	for (i = 0; i < periodiccnt; ++i)	840	for (i = 0; i < periodiccnt; ++i)
611	{	841	{
612	struct ev_periodic *w = periodics [i];	842	struct ev_periodic *w = periodics [i];
613		843
614	if (w->interval)	844	if (w->interval)
615	{	845	{
616	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	846	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
617		847
618	if (fabs (diff) >= 1e-4)	848	if (fabs (diff) >= 1e-4)
619	{	849	{
620	ev_periodic_stop (w);	850	ev_periodic_stop (EV_A_ w);
621	ev_periodic_start (w);	851	ev_periodic_start (EV_A_ w);
622		852
623	i = 0; /* restart loop, inefficient, but time jumps should be rare */	853	i = 0; /* restart loop, inefficient, but time jumps should be rare */
624	}	854	}
625	}	855	}
626	}	856	}
627	}	857	}
628		858
629	static int	859	inline int
630	time_update_monotonic (void)	860	time_update_monotonic (EV_P)
631	{	861	{
632	now = get_clock ();	862	mn_now = get_clock ();
633		863
634	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	864	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
635	{	865	{
636	ev_now = now + diff;	866	rt_now = rtmn_diff + mn_now;
637	return 0;	867	return 0;
638	}	868	}
639	else	869	else
640	{	870	{
641	now_floor = now;	871	now_floor = mn_now;
642	ev_now = ev_time ();	872	rt_now = ev_time ();
643	return 1;	873	return 1;
644	}	874	}
645	}	875	}
646		876
647	static void	877	static void
648	time_update (void)	878	time_update (EV_P)
649	{	879	{
650	int i;	880	int i;
651		881
652	#if EV_USE_MONOTONIC	882	#if EV_USE_MONOTONIC
653	if (expect_true (have_monotonic))	883	if (expect_true (have_monotonic))
654	{	884	{
655	if (time_update_monotonic ())	885	if (time_update_monotonic (EV_A))
656	{	886	{
657	ev_tstamp odiff = diff;	887	ev_tstamp odiff = rtmn_diff;
658		888
659	for (i = 4; --i; ) /* loop a few times, before making important decisions */	889	for (i = 4; --i; ) /* loop a few times, before making important decisions */
660	{	890	{
661	diff = ev_now - now;	891	rtmn_diff = rt_now - mn_now;
662		892
663	if (fabs (odiff - diff) < MIN_TIMEJUMP)	893	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
664	return; /* all is well */	894	return; /* all is well */
665		895
666	ev_now = ev_time ();	896	rt_now = ev_time ();
667	now = get_clock ();	897	mn_now = get_clock ();
668	now_floor = now;	898	now_floor = mn_now;
669	}	899	}
670		900
671	periodics_reschedule (diff - odiff);	901	periodics_reschedule (EV_A);
672	/* no timer adjustment, as the monotonic clock doesn't jump */	902	/* no timer adjustment, as the monotonic clock doesn't jump */
		903	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
673	}	904	}
674	}	905	}
675	else	906	else
676	#endif	907	#endif
677	{	908	{
678	ev_now = ev_time ();	909	rt_now = ev_time ();
679		910
680	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	911	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
681	{	912	{
682	periodics_reschedule (ev_now - now);	913	periodics_reschedule (EV_A);
683		914
684	/* adjust timers. this is easy, as the offset is the same for all */	915	/* adjust timers. this is easy, as the offset is the same for all */
685	for (i = 0; i < timercnt; ++i)	916	for (i = 0; i < timercnt; ++i)
686	timers [i]->at += diff;	917	timers [i]->at += rt_now - mn_now;
687	}	918	}
688		919
689	now = ev_now;	920	mn_now = rt_now;
690	}	921	}
691	}	922	}
692		923
693	int ev_loop_done;	924	void
		925	ev_ref (EV_P)
		926	{
		927	++activecnt;
		928	}
694		929
		930	void
		931	ev_unref (EV_P)
		932	{
		933	--activecnt;
		934	}
		935
		936	static int loop_done;
		937
		938	void
695	void ev_loop (int flags)	939	ev_loop (EV_P_ int flags)
696	{	940	{
697	double block;	941	double block;
698	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	942	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
699		943
700	do	944	do
701	{	945	{
702	/* queue check watchers (and execute them) */	946	/* queue check watchers (and execute them) */
703	if (expect_false (preparecnt))	947	if (expect_false (preparecnt))
704	{	948	{
705	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	949	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
706	call_pending ();	950	call_pending (EV_A);
707	}	951	}
708		952
709	/* update fd-related kernel structures */	953	/* update fd-related kernel structures */
710	fd_reify ();	954	fd_reify (EV_A);
711		955
712	/* calculate blocking time */	956	/* calculate blocking time */
713		957
714	/* we only need this for !monotonic clockor timers, but as we basically	958	/* we only need this for !monotonic clockor timers, but as we basically
715	always have timers, we just calculate it always */	959	always have timers, we just calculate it always */
716	#if EV_USE_MONOTONIC	960	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	961	if (expect_true (have_monotonic))
718	time_update_monotonic ();	962	time_update_monotonic (EV_A);
719	else	963	else
720	#endif	964	#endif
721	{	965	{
722	ev_now = ev_time ();	966	rt_now = ev_time ();
723	now = ev_now;	967	mn_now = rt_now;
724	}	968	}
725		969
726	if (flags & EVLOOP_NONBLOCK || idlecnt)	970	if (flags & EVLOOP_NONBLOCK || idlecnt)
727	block = 0.;	971	block = 0.;
728	else	972	else
729	{	973	{
730	block = MAX_BLOCKTIME;	974	block = MAX_BLOCKTIME;
731		975
732	if (timercnt)	976	if (timercnt)
733	{	977	{
734	ev_tstamp to = timers [0]->at - now + method_fudge;	978	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
735	if (block > to) block = to;	979	if (block > to) block = to;
736	}	980	}
737		981
738	if (periodiccnt)	982	if (periodiccnt)
739	{	983	{
740	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	984	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
741	if (block > to) block = to;	985	if (block > to) block = to;
742	}	986	}
743		987
744	if (block < 0.) block = 0.;	988	if (block < 0.) block = 0.;
745	}	989	}
746		990
747	method_poll (block);	991	method_poll (EV_A_ block);
748		992
749	/* update ev_now, do magic */	993	/* update rt_now, do magic */
750	time_update ();	994	time_update (EV_A);
751		995
752	/* queue pending timers and reschedule them */	996	/* queue pending timers and reschedule them */
753	timers_reify (); /* relative timers called last */	997	timers_reify (EV_A); /* relative timers called last */
754	periodics_reify (); /* absolute timers called first */	998	periodics_reify (EV_A); /* absolute timers called first */
755		999
756	/* queue idle watchers unless io or timers are pending */	1000	/* queue idle watchers unless io or timers are pending */
757	if (!pendingcnt)	1001	if (!pendingcnt)
758	queue_events ((W *)idles, idlecnt, EV_IDLE);	1002	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
759		1003
760	/* queue check watchers, to be executed first */	1004	/* queue check watchers, to be executed first */
761	if (checkcnt)	1005	if (checkcnt)
762	queue_events ((W *)checks, checkcnt, EV_CHECK);	1006	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
763		1007
764	call_pending ();	1008	call_pending (EV_A);
765	}	1009	}
766	while (!ev_loop_done);	1010	while (activecnt && !loop_done);
767		1011
768	if (ev_loop_done != 2)	1012	if (loop_done != 2)
769	ev_loop_done = 0;	1013	loop_done = 0;
		1014	}
		1015
		1016	void
		1017	ev_unloop (EV_P_ int how)
		1018	{
		1019	loop_done = how;
770	}	1020	}
771		1021
772	/*****************************************************************************/	1022	/*****************************************************************************/
773		1023
774	static void	1024	inline void
775	wlist_add (WL *head, WL elem)	1025	wlist_add (WL *head, WL elem)
776	{	1026	{
777	elem->next = *head;	1027	elem->next = *head;
778	*head = elem;	1028	*head = elem;
779	}	1029	}
780		1030
781	static void	1031	inline void
782	wlist_del (WL *head, WL elem)	1032	wlist_del (WL *head, WL elem)
783	{	1033	{
784	while (*head)	1034	while (*head)
785	{	1035	{
786	if (*head == elem)	1036	if (*head == elem)
…		…
791		1041
792	head = &(*head)->next;	1042	head = &(*head)->next;
793	}	1043	}
794	}	1044	}
795		1045
796	static void	1046	inline void
797	ev_clear_pending (W w)	1047	ev_clear_pending (EV_P_ W w)
798	{	1048	{
799	if (w->pending)	1049	if (w->pending)
800	{	1050	{
801	pendings [w->pending - 1].w = 0;	1051	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	1052	w->pending = 0;
803	}	1053	}
804	}	1054	}
805		1055
806	static void	1056	inline void
807	ev_start (W w, int active)	1057	ev_start (EV_P_ W w, int active)
808	{	1058	{
		1059	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1060	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1061
809	w->active = active;	1062	w->active = active;
		1063	ev_ref (EV_A);
810	}	1064	}
811		1065
812	static void	1066	inline void
813	ev_stop (W w)	1067	ev_stop (EV_P_ W w)
814	{	1068	{
		1069	ev_unref (EV_A);
815	w->active = 0;	1070	w->active = 0;
816	}	1071	}
817		1072
818	/*****************************************************************************/	1073	/*****************************************************************************/
819		1074
820	void	1075	void
821	ev_io_start (struct ev_io *w)	1076	ev_io_start (EV_P_ struct ev_io *w)
822	{	1077	{
823	int fd = w->fd;	1078	int fd = w->fd;
824		1079
825	if (ev_is_active (w))	1080	if (ev_is_active (w))
826	return;	1081	return;
827		1082
828	assert (("ev_io_start called with negative fd", fd >= 0));	1083	assert (("ev_io_start called with negative fd", fd >= 0));
829		1084
830	ev_start ((W)w, 1);	1085	ev_start (EV_A_ (W)w, 1);
831	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1086	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
832	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1087	wlist_add ((WL *)&anfds[fd].head, (WL)w);
833		1088
834	fd_change (fd);	1089	fd_change (EV_A_ fd);
835	}	1090	}
836		1091
837	void	1092	void
838	ev_io_stop (struct ev_io *w)	1093	ev_io_stop (EV_P_ struct ev_io *w)
839	{	1094	{
840	ev_clear_pending ((W)w);	1095	ev_clear_pending (EV_A_ (W)w);
841	if (!ev_is_active (w))	1096	if (!ev_is_active (w))
842	return;	1097	return;
843		1098
844	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1099	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
845	ev_stop ((W)w);	1100	ev_stop (EV_A_ (W)w);
846		1101
847	fd_change (w->fd);	1102	fd_change (EV_A_ w->fd);
848	}	1103	}
849		1104
850	void	1105	void
851	ev_timer_start (struct ev_timer *w)	1106	ev_timer_start (EV_P_ struct ev_timer *w)
852	{	1107	{
853	if (ev_is_active (w))	1108	if (ev_is_active (w))
854	return;	1109	return;
855		1110
856	w->at += now;	1111	w->at += mn_now;
857		1112
858	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1113	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859		1114
860	ev_start ((W)w, ++timercnt);	1115	ev_start (EV_A_ (W)w, ++timercnt);
861	array_needsize (timers, timermax, timercnt, );	1116	array_needsize (timers, timermax, timercnt, );
862	timers [timercnt - 1] = w;	1117	timers [timercnt - 1] = w;
863	upheap ((WT *)timers, timercnt - 1);	1118	upheap ((WT *)timers, timercnt - 1);
864	}	1119	}
865		1120
866	void	1121	void
867	ev_timer_stop (struct ev_timer *w)	1122	ev_timer_stop (EV_P_ struct ev_timer *w)
868	{	1123	{
869	ev_clear_pending ((W)w);	1124	ev_clear_pending (EV_A_ (W)w);
870	if (!ev_is_active (w))	1125	if (!ev_is_active (w))
871	return;	1126	return;
872		1127
873	if (w->active < timercnt--)	1128	if (w->active < timercnt--)
874	{	1129	{
…		…
876	downheap ((WT *)timers, timercnt, w->active - 1);	1131	downheap ((WT *)timers, timercnt, w->active - 1);
877	}	1132	}
878		1133
879	w->at = w->repeat;	1134	w->at = w->repeat;
880		1135
881	ev_stop ((W)w);	1136	ev_stop (EV_A_ (W)w);
882	}	1137	}
883		1138
884	void	1139	void
885	ev_timer_again (struct ev_timer *w)	1140	ev_timer_again (EV_P_ struct ev_timer *w)
886	{	1141	{
887	if (ev_is_active (w))	1142	if (ev_is_active (w))
888	{	1143	{
889	if (w->repeat)	1144	if (w->repeat)
890	{	1145	{
891	w->at = now + w->repeat;	1146	w->at = mn_now + w->repeat;
892	downheap ((WT *)timers, timercnt, w->active - 1);	1147	downheap ((WT *)timers, timercnt, w->active - 1);
893	}	1148	}
894	else	1149	else
895	ev_timer_stop (w);	1150	ev_timer_stop (EV_A_ w);
896	}	1151	}
897	else if (w->repeat)	1152	else if (w->repeat)
898	ev_timer_start (w);	1153	ev_timer_start (EV_A_ w);
899	}	1154	}
900		1155
901	void	1156	void
902	ev_periodic_start (struct ev_periodic *w)	1157	ev_periodic_start (EV_P_ struct ev_periodic *w)
903	{	1158	{
904	if (ev_is_active (w))	1159	if (ev_is_active (w))
905	return;	1160	return;
906		1161
907	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1162	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908		1163
909	/* this formula differs from the one in periodic_reify because we do not always round up */	1164	/* this formula differs from the one in periodic_reify because we do not always round up */
910	if (w->interval)	1165	if (w->interval)
911	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1166	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
912		1167
913	ev_start ((W)w, ++periodiccnt);	1168	ev_start (EV_A_ (W)w, ++periodiccnt);
914	array_needsize (periodics, periodicmax, periodiccnt, );	1169	array_needsize (periodics, periodicmax, periodiccnt, );
915	periodics [periodiccnt - 1] = w;	1170	periodics [periodiccnt - 1] = w;
916	upheap ((WT *)periodics, periodiccnt - 1);	1171	upheap ((WT *)periodics, periodiccnt - 1);
917	}	1172	}
918		1173
919	void	1174	void
920	ev_periodic_stop (struct ev_periodic *w)	1175	ev_periodic_stop (EV_P_ struct ev_periodic *w)
921	{	1176	{
922	ev_clear_pending ((W)w);	1177	ev_clear_pending (EV_A_ (W)w);
923	if (!ev_is_active (w))	1178	if (!ev_is_active (w))
924	return;	1179	return;
925		1180
926	if (w->active < periodiccnt--)	1181	if (w->active < periodiccnt--)
927	{	1182	{
928	periodics [w->active - 1] = periodics [periodiccnt];	1183	periodics [w->active - 1] = periodics [periodiccnt];
929	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1184	downheap ((WT *)periodics, periodiccnt, w->active - 1);
930	}	1185	}
931		1186
932	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
933	}	1188	}
934		1189
935	void	1190	void
936	ev_signal_start (struct ev_signal *w)	1191	ev_idle_start (EV_P_ struct ev_idle *w)
937	{	1192	{
938	if (ev_is_active (w))	1193	if (ev_is_active (w))
939	return;	1194	return;
940		1195
		1196	ev_start (EV_A_ (W)w, ++idlecnt);
		1197	array_needsize (idles, idlemax, idlecnt, );
		1198	idles [idlecnt - 1] = w;
		1199	}
		1200
		1201	void
		1202	ev_idle_stop (EV_P_ struct ev_idle *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	idles [w->active - 1] = idles [--idlecnt];
		1209	ev_stop (EV_A_ (W)w);
		1210	}
		1211
		1212	void
		1213	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1214	{
		1215	if (ev_is_active (w))
		1216	return;
		1217
		1218	ev_start (EV_A_ (W)w, ++preparecnt);
		1219	array_needsize (prepares, preparemax, preparecnt, );
		1220	prepares [preparecnt - 1] = w;
		1221	}
		1222
		1223	void
		1224	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1225	{
		1226	ev_clear_pending (EV_A_ (W)w);
		1227	if (ev_is_active (w))
		1228	return;
		1229
		1230	prepares [w->active - 1] = prepares [--preparecnt];
		1231	ev_stop (EV_A_ (W)w);
		1232	}
		1233
		1234	void
		1235	ev_check_start (EV_P_ struct ev_check *w)
		1236	{
		1237	if (ev_is_active (w))
		1238	return;
		1239
		1240	ev_start (EV_A_ (W)w, ++checkcnt);
		1241	array_needsize (checks, checkmax, checkcnt, );
		1242	checks [checkcnt - 1] = w;
		1243	}
		1244
		1245	void
		1246	ev_check_stop (EV_P_ struct ev_check *w)
		1247	{
		1248	ev_clear_pending (EV_A_ (W)w);
		1249	if (ev_is_active (w))
		1250	return;
		1251
		1252	checks [w->active - 1] = checks [--checkcnt];
		1253	ev_stop (EV_A_ (W)w);
		1254	}
		1255
		1256	#ifndef SA_RESTART
		1257	# define SA_RESTART 0
		1258	#endif
		1259
		1260	void
		1261	ev_signal_start (EV_P_ struct ev_signal *w)
		1262	{
		1263	#if EV_MULTIPLICITY
		1264	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1265	#endif
		1266	if (ev_is_active (w))
		1267	return;
		1268
941	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1269	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942		1270
943	ev_start ((W)w, 1);	1271	ev_start (EV_A_ (W)w, 1);
944	array_needsize (signals, signalmax, w->signum, signals_init);	1272	array_needsize (signals, signalmax, w->signum, signals_init);
945	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1273	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
946		1274
947	if (!w->next)	1275	if (!w->next)
948	{	1276	{
949	struct sigaction sa;	1277	struct sigaction sa;
950	sa.sa_handler = sighandler;	1278	sa.sa_handler = sighandler;
951	sigfillset (&sa.sa_mask);	1279	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	1280	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	1281	sigaction (w->signum, &sa, 0);
954	}	1282	}
955	}	1283	}
956		1284
957	void	1285	void
958	ev_signal_stop (struct ev_signal *w)	1286	ev_signal_stop (EV_P_ struct ev_signal *w)
959	{	1287	{
960	ev_clear_pending ((W)w);	1288	ev_clear_pending (EV_A_ (W)w);
961	if (!ev_is_active (w))	1289	if (!ev_is_active (w))
962	return;	1290	return;
963		1291
964	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1292	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
965	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
966		1294
967	if (!signals [w->signum - 1].head)	1295	if (!signals [w->signum - 1].head)
968	signal (w->signum, SIG_DFL);	1296	signal (w->signum, SIG_DFL);
969	}	1297	}
970		1298
971	void	1299	void
972	ev_idle_start (struct ev_idle *w)	1300	ev_child_start (EV_P_ struct ev_child *w)
973	{	1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
974	if (ev_is_active (w))	1305	if (ev_is_active (w))
975	return;	1306	return;
976		1307
977	ev_start ((W)w, ++idlecnt);	1308	ev_start (EV_A_ (W)w, 1);
978	array_needsize (idles, idlemax, idlecnt, );	1309	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
979	idles [idlecnt - 1] = w;
980	}	1310	}
981		1311
982	void	1312	void
983	ev_idle_stop (struct ev_idle *w)	1313	ev_child_stop (EV_P_ struct ev_child *w)
984	{	1314	{
985	ev_clear_pending ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	1316	if (ev_is_active (w))
987	return;	1317	return;
988		1318
989	idles [w->active - 1] = idles [--idlecnt];
990	ev_stop ((W)w);
991	}
992
993	void
994	ev_prepare_start (struct ev_prepare *w)
995	{
996	if (ev_is_active (w))
997	return;
998
999	ev_start ((W)w, ++preparecnt);
1000	array_needsize (prepares, preparemax, preparecnt, );
1001	prepares [preparecnt - 1] = w;
1002	}
1003
1004	void
1005	ev_prepare_stop (struct ev_prepare *w)
1006	{
1007	ev_clear_pending ((W)w);
1008	if (ev_is_active (w))
1009	return;
1010
1011	prepares [w->active - 1] = prepares [--preparecnt];
1012	ev_stop ((W)w);
1013	}
1014
1015	void
1016	ev_check_start (struct ev_check *w)
1017	{
1018	if (ev_is_active (w))
1019	return;
1020
1021	ev_start ((W)w, ++checkcnt);
1022	array_needsize (checks, checkmax, checkcnt, );
1023	checks [checkcnt - 1] = w;
1024	}
1025
1026	void
1027	ev_check_stop (struct ev_check *w)
1028	{
1029	ev_clear_pending ((W)w);
1030	if (ev_is_active (w))
1031	return;
1032
1033	checks [w->active - 1] = checks [--checkcnt];
1034	ev_stop ((W)w);
1035	}
1036
1037	void
1038	ev_child_start (struct ev_child *w)
1039	{
1040	if (ev_is_active (w))
1041	return;
1042
1043	ev_start ((W)w, 1);
1044	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1045	}
1046
1047	void
1048	ev_child_stop (struct ev_child *w)
1049	{
1050	ev_clear_pending ((W)w);
1051	if (ev_is_active (w))
1052	return;
1053
1054	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1319	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1055	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
1056	}	1321	}
1057		1322
1058	/*****************************************************************************/	1323	/*****************************************************************************/
1059		1324
1060	struct ev_once	1325	struct ev_once
…		…
1064	void (*cb)(int revents, void *arg);	1329	void (*cb)(int revents, void *arg);
1065	void *arg;	1330	void *arg;
1066	};	1331	};
1067		1332
1068	static void	1333	static void
1069	once_cb (struct ev_once *once, int revents)	1334	once_cb (EV_P_ struct ev_once *once, int revents)
1070	{	1335	{
1071	void (*cb)(int revents, void *arg) = once->cb;	1336	void (*cb)(int revents, void *arg) = once->cb;
1072	void *arg = once->arg;	1337	void *arg = once->arg;
1073		1338
1074	ev_io_stop (&once->io);	1339	ev_io_stop (EV_A_ &once->io);
1075	ev_timer_stop (&once->to);	1340	ev_timer_stop (EV_A_ &once->to);
1076	free (once);	1341	free (once);
1077		1342
1078	cb (revents, arg);	1343	cb (revents, arg);
1079	}	1344	}
1080		1345
1081	static void	1346	static void
1082	once_cb_io (struct ev_io *w, int revents)	1347	once_cb_io (EV_P_ struct ev_io *w, int revents)
1083	{	1348	{
1084	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1349	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1085	}	1350	}
1086		1351
1087	static void	1352	static void
1088	once_cb_to (struct ev_timer *w, int revents)	1353	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1089	{	1354	{
1090	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1355	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1091	}	1356	}
1092		1357
1093	void	1358	void
1094	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1359	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1095	{	1360	{
1096	struct ev_once *once = malloc (sizeof (struct ev_once));	1361	struct ev_once *once = malloc (sizeof (struct ev_once));
1097		1362
1098	if (!once)	1363	if (!once)
1099	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1364	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1104		1369
1105	ev_watcher_init (&once->io, once_cb_io);	1370	ev_watcher_init (&once->io, once_cb_io);
1106	if (fd >= 0)	1371	if (fd >= 0)
1107	{	1372	{
1108	ev_io_set (&once->io, fd, events);	1373	ev_io_set (&once->io, fd, events);
1109	ev_io_start (&once->io);	1374	ev_io_start (EV_A_ &once->io);
1110	}	1375	}
1111		1376
1112	ev_watcher_init (&once->to, once_cb_to);	1377	ev_watcher_init (&once->to, once_cb_to);
1113	if (timeout >= 0.)	1378	if (timeout >= 0.)
1114	{	1379	{
1115	ev_timer_set (&once->to, timeout, 0.);	1380	ev_timer_set (&once->to, timeout, 0.);
1116	ev_timer_start (&once->to);	1381	ev_timer_start (EV_A_ &once->to);
1117	}	1382	}
1118	}	1383	}
1119	}	1384	}
1120		1385
1121	/*****************************************************************************/
1122
1123	#if 0
1124
1125	struct ev_io wio;
1126
1127	static void
1128	sin_cb (struct ev_io *w, int revents)
1129	{
1130	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1131	}
1132
1133	static void
1134	ocb (struct ev_timer *w, int revents)
1135	{
1136	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1137	ev_timer_stop (w);
1138	ev_timer_start (w);
1139	}
1140
1141	static void
1142	scb (struct ev_signal *w, int revents)
1143	{
1144	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1145	ev_io_stop (&wio);
1146	ev_io_start (&wio);
1147	}
1148
1149	static void
1150	gcb (struct ev_signal *w, int revents)
1151	{
1152	fprintf (stderr, "generic %x\n", revents);
1153
1154	}
1155
1156	int main (void)
1157	{
1158	ev_init (0);
1159
1160	ev_io_init (&wio, sin_cb, 0, EV_READ);
1161	ev_io_start (&wio);
1162
1163	struct ev_timer t[10000];
1164
1165	#if 0
1166	int i;
1167	for (i = 0; i < 10000; ++i)
1168	{
1169	struct ev_timer *w = t + i;
1170	ev_watcher_init (w, ocb, i);
1171	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1172	ev_timer_start (w);
1173	if (drand48 () < 0.5)
1174	ev_timer_stop (w);
1175	}
1176	#endif
1177
1178	struct ev_timer t1;
1179	ev_timer_init (&t1, ocb, 5, 10);
1180	ev_timer_start (&t1);
1181
1182	struct ev_signal sig;
1183	ev_signal_init (&sig, scb, SIGQUIT);
1184	ev_signal_start (&sig);
1185
1186	struct ev_check cw;
1187	ev_check_init (&cw, gcb);
1188	ev_check_start (&cw);
1189
1190	struct ev_idle iw;
1191	ev_idle_init (&iw, gcb);
1192	ev_idle_start (&iw);
1193
1194	ev_loop (0);
1195
1196	return 0;
1197	}
1198
1199	#endif
1200
1201
1202
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