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Comparing libev/ev.c (file contents):
Revision 1.46 by root, Sat Nov 3 09:20:12 2007 UTC vs.
Revision 1.71 by root, Tue Nov 6 13:17:55 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>
38	#include <fcntl.h>	59	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	60	#include <stddef.h>
41		61
42	#include <stdio.h>	62	#include <stdio.h>
43		63
44	#include <assert.h>	64	#include <assert.h>
45	#include <errno.h>	65	#include <errno.h>
46	#include <sys/types.h>	66	#include <sys/types.h>
		67	#include <time.h>
		68
		69	#ifndef PERL
		70	# include <signal.h>
		71	#endif
		72
47	#ifndef WIN32	73	#ifndef WIN32
		74	# include <unistd.h>
		75	# include <sys/time.h>
48	# include <sys/wait.h>	76	# include <sys/wait.h>
49	#endif	77	#endif
50	#include <sys/time.h>
51	#include <time.h>
52
53	/**/	78	/**/
54		79
55	#ifndef EV_USE_MONOTONIC	80	#ifndef EV_USE_MONOTONIC
56	# define EV_USE_MONOTONIC 1	81	# define EV_USE_MONOTONIC 1
57	#endif	82	#endif
…		…
68	# define EV_USE_EPOLL 0	93	# define EV_USE_EPOLL 0
69	#endif	94	#endif
70		95
71	#ifndef EV_USE_KQUEUE	96	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	97	# define EV_USE_KQUEUE 0
		98	#endif
		99
		100	#ifndef EV_USE_WIN32
		101	# ifdef WIN32
		102	# define EV_USE_WIN32 0 /* it does not exist, use select */
		103	# undef EV_USE_SELECT
		104	# define EV_USE_SELECT 1
		105	# else
		106	# define EV_USE_WIN32 0
		107	# endif
73	#endif	108	#endif
74		109
75	#ifndef EV_USE_REALTIME	110	#ifndef EV_USE_REALTIME
76	# define EV_USE_REALTIME 1	111	# define EV_USE_REALTIME 1
77	#endif	112	#endif
…		…
113		148
114	typedef struct ev_watcher *W;	149	typedef struct ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	150	typedef struct ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	151	typedef struct ev_watcher_time *WT;
117		152
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	153	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
119	ev_tstamp ev_now;
120	int ev_method;
121		154
122	static int have_monotonic; /* runtime */	155	#if WIN32
123		156	/* note: the comment below could not be substantiated, but what would I care */
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	157	/* MSDN says this is required to handle SIGFPE */
125	static void (*method_modify)(int fd, int oev, int nev);	158	volatile double SIGFPE_REQ = 0.0f;
126	static void (*method_poll)(ev_tstamp timeout);	159	#endif
127		160
128	/*****************************************************************************/	161	/*****************************************************************************/
129		162
130	ev_tstamp	163	static void (*syserr_cb)(const char *msg);
		164
		165	void ev_set_syserr_cb (void (*cb)(const char *msg))
		166	{
		167	syserr_cb = cb;
		168	}
		169
		170	static void
		171	syserr (const char *msg)
		172	{
		173	if (!msg)
		174	msg = "(libev) system error";
		175
		176	if (syserr_cb)
		177	syserr_cb (msg);
		178	else
		179	{
		180	perror (msg);
		181	abort ();
		182	}
		183	}
		184
		185	static void *(*alloc)(void *ptr, long size);
		186
		187	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		188	{
		189	alloc = cb;
		190	}
		191
		192	static void *
		193	ev_realloc (void *ptr, long size)
		194	{
		195	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		196
		197	if (!ptr && size)
		198	{
		199	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		200	abort ();
		201	}
		202
		203	return ptr;
		204	}
		205
		206	#define ev_malloc(size) ev_realloc (0, (size))
		207	#define ev_free(ptr) ev_realloc ((ptr), 0)
		208
		209	/*****************************************************************************/
		210
		211	typedef struct
		212	{
		213	WL head;
		214	unsigned char events;
		215	unsigned char reify;
		216	} ANFD;
		217
		218	typedef struct
		219	{
		220	W w;
		221	int events;
		222	} ANPENDING;
		223
		224	#if EV_MULTIPLICITY
		225
		226	struct ev_loop
		227	{
		228	# define VAR(name,decl) decl;
		229	# include "ev_vars.h"
		230	};
		231	# undef VAR
		232	# include "ev_wrap.h"
		233
		234	#else
		235
		236	# define VAR(name,decl) static decl;
		237	# include "ev_vars.h"
		238	# undef VAR
		239
		240	#endif
		241
		242	/*****************************************************************************/
		243
		244	inline ev_tstamp
131	ev_time (void)	245	ev_time (void)
132	{	246	{
133	#if EV_USE_REALTIME	247	#if EV_USE_REALTIME
134	struct timespec ts;	248	struct timespec ts;
135	clock_gettime (CLOCK_REALTIME, &ts);	249	clock_gettime (CLOCK_REALTIME, &ts);
…		…
139	gettimeofday (&tv, 0);	253	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	254	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	255	#endif
142	}	256	}
143		257
144	static ev_tstamp	258	inline ev_tstamp
145	get_clock (void)	259	get_clock (void)
146	{	260	{
147	#if EV_USE_MONOTONIC	261	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	262	if (expect_true (have_monotonic))
149	{	263	{
…		…
154	#endif	268	#endif
155		269
156	return ev_time ();	270	return ev_time ();
157	}	271	}
158		272
		273	ev_tstamp
		274	ev_now (EV_P)
		275	{
		276	return rt_now;
		277	}
		278
159	#define array_roundsize(base,n) ((n) | 4 & ~3)	279	#define array_roundsize(base,n) ((n) | 4 & ~3)
160		280
161	#define array_needsize(base,cur,cnt,init) \	281	#define array_needsize(base,cur,cnt,init) \
162	if (expect_false ((cnt) > cur)) \	282	if (expect_false ((cnt) > cur)) \
163	{ \	283	{ \
164	int newcnt = cur; \	284	int newcnt = cur; \
165	do \	285	do \
166	{ \	286	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \	287	newcnt = array_roundsize (base, newcnt << 1); \
168	} \	288	} \
169	while ((cnt) > newcnt); \	289	while ((cnt) > newcnt); \
170	\	290	\
171	base = realloc (base, sizeof (*base) * (newcnt)); \	291	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
172	init (base + cur, newcnt - cur); \	292	init (base + cur, newcnt - cur); \
173	cur = newcnt; \	293	cur = newcnt; \
174	}	294	}
		295
		296	#define array_slim(stem) \
		297	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		298	{ \
		299	stem ## max = array_roundsize (stem ## cnt >> 1); \
		300	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \
		301	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		302	}
		303
		304	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		305	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		306	#define array_free_microshit(stem) \
		307	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		308
		309	#define array_free(stem, idx) \
		310	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
175		311
176	/*****************************************************************************/	312	/*****************************************************************************/
177
178	typedef struct
179	{
180	struct ev_io *head;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184
185	static ANFD *anfds;
186	static int anfdmax;
187		313
188	static void	314	static void
189	anfds_init (ANFD *base, int count)	315	anfds_init (ANFD *base, int count)
190	{	316	{
191	while (count--)	317	while (count--)
…		…
196		322
197	++base;	323	++base;
198	}	324	}
199	}	325	}
200		326
201	typedef struct
202	{
203	W w;
204	int events;
205	} ANPENDING;
206
207	static ANPENDING *pendings [NUMPRI];
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void	327	static void
211	event (W w, int events)	328	event (EV_P_ W w, int events)
212	{	329	{
213	if (w->pending)	330	if (w->pending)
214	{	331	{
215	pendings [ABSPRI (w)][w->pending - 1].events |= events;	332	pendings [ABSPRI (w)][w->pending - 1].events |= events;
216	return;	333	return;
217	}	334	}
218		335
219	w->pending = ++pendingcnt [ABSPRI (w)];	336	w->pending = ++pendingcnt [ABSPRI (w)];
220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );	337	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
221	pendings [ABSPRI (w)][w->pending - 1].w = w;	338	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;	339	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}	340	}
224		341
225	static void	342	static void
226	queue_events (W *events, int eventcnt, int type)	343	queue_events (EV_P_ W *events, int eventcnt, int type)
227	{	344	{
228	int i;	345	int i;
229		346
230	for (i = 0; i < eventcnt; ++i)	347	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);	348	event (EV_A_ events [i], type);
232	}	349	}
233		350
234	static void	351	static void
235	fd_event (int fd, int events)	352	fd_event (EV_P_ int fd, int events)
236	{	353	{
237	ANFD *anfd = anfds + fd;	354	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	355	struct ev_io *w;
239		356
240	for (w = anfd->head; w; w = w->next)	357	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
241	{	358	{
242	int ev = w->events & events;	359	int ev = w->events & events;
243		360
244	if (ev)	361	if (ev)
245	event ((W)w, ev);	362	event (EV_A_ (W)w, ev);
246	}	363	}
247	}	364	}
248		365
249	/*****************************************************************************/	366	/*****************************************************************************/
250		367
251	static int *fdchanges;
252	static int fdchangemax, fdchangecnt;
253
254	static void	368	static void
255	fd_reify (void)	369	fd_reify (EV_P)
256	{	370	{
257	int i;	371	int i;
258		372
259	for (i = 0; i < fdchangecnt; ++i)	373	for (i = 0; i < fdchangecnt; ++i)
260	{	374	{
…		…
262	ANFD *anfd = anfds + fd;	376	ANFD *anfd = anfds + fd;
263	struct ev_io *w;	377	struct ev_io *w;
264		378
265	int events = 0;	379	int events = 0;
266		380
267	for (w = anfd->head; w; w = w->next)	381	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
268	events |= w->events;	382	events |= w->events;
269		383
270	anfd->reify = 0;	384	anfd->reify = 0;
271		385
272	if (anfd->events != events)
273	{
274	method_modify (fd, anfd->events, events);	386	method_modify (EV_A_ fd, anfd->events, events);
275	anfd->events = events;	387	anfd->events = events;
276	}
277	}	388	}
278		389
279	fdchangecnt = 0;	390	fdchangecnt = 0;
280	}	391	}
281		392
282	static void	393	static void
283	fd_change (int fd)	394	fd_change (EV_P_ int fd)
284	{	395	{
285	if (anfds [fd].reify || fdchangecnt < 0)	396	if (anfds [fd].reify)
286	return;	397	return;
287		398
288	anfds [fd].reify = 1;	399	anfds [fd].reify = 1;
289		400
290	++fdchangecnt;	401	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	402	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
292	fdchanges [fdchangecnt - 1] = fd;	403	fdchanges [fdchangecnt - 1] = fd;
293	}	404	}
294		405
295	static void	406	static void
296	fd_kill (int fd)	407	fd_kill (EV_P_ int fd)
297	{	408	{
298	struct ev_io *w;	409	struct ev_io *w;
299		410
300	printf ("killing fd %d\n", fd);//D
301	while ((w = anfds [fd].head))	411	while ((w = (struct ev_io *)anfds [fd].head))
302	{	412	{
303	ev_io_stop (w);	413	ev_io_stop (EV_A_ w);
304	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	414	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305	}	415	}
		416	}
		417
		418	static int
		419	fd_valid (int fd)
		420	{
		421	#ifdef WIN32
		422	return !!win32_get_osfhandle (fd);
		423	#else
		424	return fcntl (fd, F_GETFD) != -1;
		425	#endif
306	}	426	}
307		427
308	/* called on EBADF to verify fds */	428	/* called on EBADF to verify fds */
309	static void	429	static void
310	fd_ebadf (void)	430	fd_ebadf (EV_P)
311	{	431	{
312	int fd;	432	int fd;
313		433
314	for (fd = 0; fd < anfdmax; ++fd)	434	for (fd = 0; fd < anfdmax; ++fd)
315	if (anfds [fd].events)	435	if (anfds [fd].events)
316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	436	if (!fd_valid (fd) == -1 && errno == EBADF)
317	fd_kill (fd);	437	fd_kill (EV_A_ fd);
318	}	438	}
319		439
320	/* called on ENOMEM in select/poll to kill some fds and retry */	440	/* called on ENOMEM in select/poll to kill some fds and retry */
321	static void	441	static void
322	fd_enomem (void)	442	fd_enomem (EV_P)
323	{	443	{
324	int fd = anfdmax;	444	int fd;
325		445
326	while (fd--)	446	for (fd = anfdmax; fd--; )
327	if (anfds [fd].events)	447	if (anfds [fd].events)
328	{	448	{
329	close (fd);
330	fd_kill (fd);	449	fd_kill (EV_A_ fd);
331	return;	450	return;
332	}	451	}
333	}	452	}
334		453
		454	/* usually called after fork if method needs to re-arm all fds from scratch */
		455	static void
		456	fd_rearm_all (EV_P)
		457	{
		458	int fd;
		459
		460	/* this should be highly optimised to not do anything but set a flag */
		461	for (fd = 0; fd < anfdmax; ++fd)
		462	if (anfds [fd].events)
		463	{
		464	anfds [fd].events = 0;
		465	fd_change (EV_A_ fd);
		466	}
		467	}
		468
335	/*****************************************************************************/	469	/*****************************************************************************/
336		470
337	static struct ev_timer **timers;
338	static int timermax, timercnt;
339
340	static struct ev_periodic **periodics;
341	static int periodicmax, periodiccnt;
342
343	static void	471	static void
344	upheap (WT *timers, int k)	472	upheap (WT *heap, int k)
345	{	473	{
346	WT w = timers [k];	474	WT w = heap [k];
347		475
348	while (k && timers [k >> 1]->at > w->at)	476	while (k && heap [k >> 1]->at > w->at)
349	{	477	{
350	timers [k] = timers [k >> 1];	478	heap [k] = heap [k >> 1];
351	timers [k]->active = k + 1;	479	((W)heap [k])->active = k + 1;
352	k >>= 1;	480	k >>= 1;
353	}	481	}
354		482
355	timers [k] = w;	483	heap [k] = w;
356	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
357		485
358	}	486	}
359		487
360	static void	488	static void
361	downheap (WT *timers, int N, int k)	489	downheap (WT *heap, int N, int k)
362	{	490	{
363	WT w = timers [k];	491	WT w = heap [k];
364		492
365	while (k < (N >> 1))	493	while (k < (N >> 1))
366	{	494	{
367	int j = k << 1;	495	int j = k << 1;
368		496
369	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	497	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
370	++j;	498	++j;
371		499
372	if (w->at <= timers [j]->at)	500	if (w->at <= heap [j]->at)
373	break;	501	break;
374		502
375	timers [k] = timers [j];	503	heap [k] = heap [j];
376	timers [k]->active = k + 1;	504	((W)heap [k])->active = k + 1;
377	k = j;	505	k = j;
378	}	506	}
379		507
380	timers [k] = w;	508	heap [k] = w;
381	timers [k]->active = k + 1;	509	((W)heap [k])->active = k + 1;
382	}	510	}
383		511
384	/*****************************************************************************/	512	/*****************************************************************************/
385		513
386	typedef struct	514	typedef struct
387	{	515	{
388	struct ev_signal *head;	516	WL head;
389	sig_atomic_t volatile gotsig;	517	sig_atomic_t volatile gotsig;
390	} ANSIG;	518	} ANSIG;
391		519
392	static ANSIG *signals;	520	static ANSIG *signals;
393	static int signalmax;	521	static int signalmax;
…		…
409	}	537	}
410		538
411	static void	539	static void
412	sighandler (int signum)	540	sighandler (int signum)
413	{	541	{
		542	#if WIN32
		543	signal (signum, sighandler);
		544	#endif
		545
414	signals [signum - 1].gotsig = 1;	546	signals [signum - 1].gotsig = 1;
415		547
416	if (!gotsig)	548	if (!gotsig)
417	{	549	{
		550	int old_errno = errno;
418	gotsig = 1;	551	gotsig = 1;
419	write (sigpipe [1], &signum, 1);	552	write (sigpipe [1], &signum, 1);
		553	errno = old_errno;
420	}	554	}
421	}	555	}
422		556
423	static void	557	static void
424	sigcb (struct ev_io *iow, int revents)	558	sigcb (EV_P_ struct ev_io *iow, int revents)
425	{	559	{
426	struct ev_signal *w;	560	WL w;
427	int signum;	561	int signum;
428		562
429	read (sigpipe [0], &revents, 1);	563	read (sigpipe [0], &revents, 1);
430	gotsig = 0;	564	gotsig = 0;
431		565
…		…
433	if (signals [signum].gotsig)	567	if (signals [signum].gotsig)
434	{	568	{
435	signals [signum].gotsig = 0;	569	signals [signum].gotsig = 0;
436		570
437	for (w = signals [signum].head; w; w = w->next)	571	for (w = signals [signum].head; w; w = w->next)
438	event ((W)w, EV_SIGNAL);	572	event (EV_A_ (W)w, EV_SIGNAL);
439	}	573	}
440	}	574	}
441		575
442	static void	576	static void
443	siginit (void)	577	siginit (EV_P)
444	{	578	{
445	#ifndef WIN32	579	#ifndef WIN32
446	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	580	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
447	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	581	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
448		582
…		…
450	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	584	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
451	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	585	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
452	#endif	586	#endif
453		587
454	ev_io_set (&sigev, sigpipe [0], EV_READ);	588	ev_io_set (&sigev, sigpipe [0], EV_READ);
455	ev_io_start (&sigev);	589	ev_io_start (EV_A_ &sigev);
		590	ev_unref (EV_A); /* child watcher should not keep loop alive */
456	}	591	}
457		592
458	/*****************************************************************************/	593	/*****************************************************************************/
459		594
460	static struct ev_idle **idles;
461	static int idlemax, idlecnt;
462
463	static struct ev_prepare **prepares;
464	static int preparemax, preparecnt;
465
466	static struct ev_check **checks;
467	static int checkmax, checkcnt;
468
469	/*****************************************************************************/
470
471	static struct ev_child *childs [PID_HASHSIZE];	595	static struct ev_child *childs [PID_HASHSIZE];
		596
		597	#ifndef WIN32
		598
472	static struct ev_signal childev;	599	static struct ev_signal childev;
473
474	#ifndef WIN32
475		600
476	#ifndef WCONTINUED	601	#ifndef WCONTINUED
477	# define WCONTINUED 0	602	# define WCONTINUED 0
478	#endif	603	#endif
479		604
480	static void	605	static void
481	childcb (struct ev_signal *sw, int revents)	606	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
482	{	607	{
483	struct ev_child *w;	608	struct ev_child *w;
		609
		610	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		611	if (w->pid == pid || !w->pid)
		612	{
		613	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		614	w->rpid = pid;
		615	w->rstatus = status;
		616	event (EV_A_ (W)w, EV_CHILD);
		617	}
		618	}
		619
		620	static void
		621	childcb (EV_P_ struct ev_signal *sw, int revents)
		622	{
484	int pid, status;	623	int pid, status;
485		624
486	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	625	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
487	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	626	{
488	if (w->pid == pid || !w->pid)	627	/* make sure we are called again until all childs have been reaped */
489	{	628	event (EV_A_ (W)sw, EV_SIGNAL);
490	w->rpid = pid;	629
491	w->rstatus = status;	630	child_reap (EV_A_ sw, pid, pid, status);
492	event ((W)w, EV_CHILD);	631	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
493	}	632	}
494	}	633	}
495		634
496	#endif	635	#endif
497		636
498	/*****************************************************************************/	637	/*****************************************************************************/
…		…
520	ev_version_minor (void)	659	ev_version_minor (void)
521	{	660	{
522	return EV_VERSION_MINOR;	661	return EV_VERSION_MINOR;
523	}	662	}
524		663
525	/* return true if we are running with elevated privileges and ignore env variables */	664	/* return true if we are running with elevated privileges and should ignore env variables */
526	static int	665	static int
527	enable_secure ()	666	enable_secure (void)
528	{	667	{
		668	#ifdef WIN32
		669	return 0;
		670	#else
529	return getuid () != geteuid ()	671	return getuid () != geteuid ()
530	|| getgid () != getegid ();	672	|| getgid () != getegid ();
		673	#endif
531	}	674	}
532		675
533	int ev_init (int methods)	676	int
		677	ev_method (EV_P)
534	{	678	{
		679	return method;
		680	}
		681
		682	static void
		683	loop_init (EV_P_ int methods)
		684	{
535	if (!ev_method)	685	if (!method)
536	{	686	{
537	#if EV_USE_MONOTONIC	687	#if EV_USE_MONOTONIC
538	{	688	{
539	struct timespec ts;	689	struct timespec ts;
540	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	690	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
541	have_monotonic = 1;	691	have_monotonic = 1;
542	}	692	}
543	#endif	693	#endif
544		694
545	ev_now = ev_time ();	695	rt_now = ev_time ();
546	now = get_clock ();	696	mn_now = get_clock ();
547	now_floor = now;	697	now_floor = mn_now;
548	diff = ev_now - now;	698	rtmn_diff = rt_now - mn_now;
549
550	if (pipe (sigpipe))
551	return 0;
552		699
553	if (methods == EVMETHOD_AUTO)	700	if (methods == EVMETHOD_AUTO)
554	if (!enable_secure () && getenv ("LIBEV_METHODS"))	701	if (!enable_secure () && getenv ("LIBEV_METHODS"))
555	methods = atoi (getenv ("LIBEV_METHODS"));	702	methods = atoi (getenv ("LIBEV_METHODS"));
556	else	703	else
557	methods = EVMETHOD_ANY;	704	methods = EVMETHOD_ANY;
558		705
559	ev_method = 0;	706	method = 0;
		707	#if EV_USE_WIN32
		708	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		709	#endif
560	#if EV_USE_KQUEUE	710	#if EV_USE_KQUEUE
561	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	711	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
562	#endif	712	#endif
563	#if EV_USE_EPOLL	713	#if EV_USE_EPOLL
564	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	714	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
565	#endif	715	#endif
566	#if EV_USE_POLL	716	#if EV_USE_POLL
567	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	717	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
568	#endif	718	#endif
569	#if EV_USE_SELECT	719	#if EV_USE_SELECT
570	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	720	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
571	#endif	721	#endif
572		722
		723	ev_watcher_init (&sigev, sigcb);
		724	ev_set_priority (&sigev, EV_MAXPRI);
		725	}
		726	}
		727
		728	void
		729	loop_destroy (EV_P)
		730	{
		731	int i;
		732
		733	#if EV_USE_WIN32
		734	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		735	#endif
		736	#if EV_USE_KQUEUE
		737	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		738	#endif
		739	#if EV_USE_EPOLL
		740	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		741	#endif
		742	#if EV_USE_POLL
		743	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		744	#endif
		745	#if EV_USE_SELECT
		746	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		747	#endif
		748
		749	for (i = NUMPRI; i--; )
		750	array_free (pending, [i]);
		751
		752	/* have to use the microsoft-never-gets-it-right macro */
		753	array_free_microshit (fdchange);
		754	array_free_microshit (timer);
		755	array_free_microshit (periodic);
		756	array_free_microshit (idle);
		757	array_free_microshit (prepare);
		758	array_free_microshit (check);
		759
		760	method = 0;
		761	}
		762
		763	static void
		764	loop_fork (EV_P)
		765	{
		766	#if EV_USE_EPOLL
		767	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		768	#endif
		769	#if EV_USE_KQUEUE
		770	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		771	#endif
		772
		773	if (ev_is_active (&sigev))
		774	{
		775	/* default loop */
		776
		777	ev_ref (EV_A);
		778	ev_io_stop (EV_A_ &sigev);
		779	close (sigpipe [0]);
		780	close (sigpipe [1]);
		781
		782	while (pipe (sigpipe))
		783	syserr ("(libev) error creating pipe");
		784
		785	siginit (EV_A);
		786	}
		787
		788	postfork = 0;
		789	}
		790
		791	#if EV_MULTIPLICITY
		792	struct ev_loop *
		793	ev_loop_new (int methods)
		794	{
		795	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		796
		797	memset (loop, 0, sizeof (struct ev_loop));
		798
		799	loop_init (EV_A_ methods);
		800
		801	if (ev_method (EV_A))
		802	return loop;
		803
		804	return 0;
		805	}
		806
		807	void
		808	ev_loop_destroy (EV_P)
		809	{
		810	loop_destroy (EV_A);
		811	ev_free (loop);
		812	}
		813
		814	void
		815	ev_loop_fork (EV_P)
		816	{
		817	postfork = 1;
		818	}
		819
		820	#endif
		821
		822	#if EV_MULTIPLICITY
		823	struct ev_loop default_loop_struct;
		824	static struct ev_loop *default_loop;
		825
		826	struct ev_loop *
		827	#else
		828	static int default_loop;
		829
		830	int
		831	#endif
		832	ev_default_loop (int methods)
		833	{
		834	if (sigpipe [0] == sigpipe [1])
		835	if (pipe (sigpipe))
		836	return 0;
		837
		838	if (!default_loop)
		839	{
		840	#if EV_MULTIPLICITY
		841	struct ev_loop *loop = default_loop = &default_loop_struct;
		842	#else
		843	default_loop = 1;
		844	#endif
		845
		846	loop_init (EV_A_ methods);
		847
573	if (ev_method)	848	if (ev_method (EV_A))
574	{	849	{
575	ev_watcher_init (&sigev, sigcb);
576	siginit ();	850	siginit (EV_A);
577		851
578	#ifndef WIN32	852	#ifndef WIN32
579	ev_signal_init (&childev, childcb, SIGCHLD);	853	ev_signal_init (&childev, childcb, SIGCHLD);
		854	ev_set_priority (&childev, EV_MAXPRI);
580	ev_signal_start (&childev);	855	ev_signal_start (EV_A_ &childev);
		856	ev_unref (EV_A); /* child watcher should not keep loop alive */
581	#endif	857	#endif
582	}	858	}
		859	else
		860	default_loop = 0;
583	}	861	}
584		862
585	return ev_method;	863	return default_loop;
		864	}
		865
		866	void
		867	ev_default_destroy (void)
		868	{
		869	#if EV_MULTIPLICITY
		870	struct ev_loop *loop = default_loop;
		871	#endif
		872
		873	#ifndef WIN32
		874	ev_ref (EV_A); /* child watcher */
		875	ev_signal_stop (EV_A_ &childev);
		876	#endif
		877
		878	ev_ref (EV_A); /* signal watcher */
		879	ev_io_stop (EV_A_ &sigev);
		880
		881	close (sigpipe [0]); sigpipe [0] = 0;
		882	close (sigpipe [1]); sigpipe [1] = 0;
		883
		884	loop_destroy (EV_A);
		885	}
		886
		887	void
		888	ev_default_fork (void)
		889	{
		890	#if EV_MULTIPLICITY
		891	struct ev_loop *loop = default_loop;
		892	#endif
		893
		894	if (method)
		895	postfork = 1;
586	}	896	}
587		897
588	/*****************************************************************************/	898	/*****************************************************************************/
589		899
590	void
591	ev_fork_prepare (void)
592	{
593	/* nop */
594	}
595
596	void
597	ev_fork_parent (void)
598	{
599	/* nop */
600	}
601
602	void
603	ev_fork_child (void)
604	{
605	#if EV_USE_EPOLL
606	if (ev_method == EVMETHOD_EPOLL)
607	epoll_postfork_child ();
608	#endif
609
610	ev_io_stop (&sigev);
611	close (sigpipe [0]);
612	close (sigpipe [1]);
613	pipe (sigpipe);
614	siginit ();
615	}
616
617	/*****************************************************************************/
618
619	static void	900	static void
620	call_pending (void)	901	call_pending (EV_P)
621	{	902	{
622	int pri;	903	int pri;
623		904
624	for (pri = NUMPRI; pri--; )	905	for (pri = NUMPRI; pri--; )
625	while (pendingcnt [pri])	906	while (pendingcnt [pri])
…		…
627	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	908	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
628		909
629	if (p->w)	910	if (p->w)
630	{	911	{
631	p->w->pending = 0;	912	p->w->pending = 0;
632	p->w->cb (p->w, p->events);	913	p->w->cb (EV_A_ p->w, p->events);
633	}	914	}
634	}	915	}
635	}	916	}
636		917
637	static void	918	static void
638	timers_reify (void)	919	timers_reify (EV_P)
639	{	920	{
640	while (timercnt && timers [0]->at <= now)	921	while (timercnt && ((WT)timers [0])->at <= mn_now)
641	{	922	{
642	struct ev_timer *w = timers [0];	923	struct ev_timer *w = timers [0];
		924
		925	assert (("inactive timer on timer heap detected", ev_is_active (w)));
643		926
644	/* first reschedule or stop timer */	927	/* first reschedule or stop timer */
645	if (w->repeat)	928	if (w->repeat)
646	{	929	{
647	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	930	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
648	w->at = now + w->repeat;	931	((WT)w)->at = mn_now + w->repeat;
649	downheap ((WT *)timers, timercnt, 0);	932	downheap ((WT *)timers, timercnt, 0);
650	}	933	}
651	else	934	else
652	ev_timer_stop (w); /* nonrepeating: stop timer */	935	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
653		936
654	event ((W)w, EV_TIMEOUT);	937	event (EV_A_ (W)w, EV_TIMEOUT);
655	}	938	}
656	}	939	}
657		940
658	static void	941	static void
659	periodics_reify (void)	942	periodics_reify (EV_P)
660	{	943	{
661	while (periodiccnt && periodics [0]->at <= ev_now)	944	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
662	{	945	{
663	struct ev_periodic *w = periodics [0];	946	struct ev_periodic *w = periodics [0];
		947
		948	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
664		949
665	/* first reschedule or stop timer */	950	/* first reschedule or stop timer */
666	if (w->interval)	951	if (w->interval)
667	{	952	{
668	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	953	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
669	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	954	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
670	downheap ((WT *)periodics, periodiccnt, 0);	955	downheap ((WT *)periodics, periodiccnt, 0);
671	}	956	}
672	else	957	else
673	ev_periodic_stop (w); /* nonrepeating: stop timer */	958	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
674		959
675	event ((W)w, EV_PERIODIC);	960	event (EV_A_ (W)w, EV_PERIODIC);
676	}	961	}
677	}	962	}
678		963
679	static void	964	static void
680	periodics_reschedule (ev_tstamp diff)	965	periodics_reschedule (EV_P)
681	{	966	{
682	int i;	967	int i;
683		968
684	/* adjust periodics after time jump */	969	/* adjust periodics after time jump */
685	for (i = 0; i < periodiccnt; ++i)	970	for (i = 0; i < periodiccnt; ++i)
686	{	971	{
687	struct ev_periodic *w = periodics [i];	972	struct ev_periodic *w = periodics [i];
688		973
689	if (w->interval)	974	if (w->interval)
690	{	975	{
691	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	976	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
692		977
693	if (fabs (diff) >= 1e-4)	978	if (fabs (diff) >= 1e-4)
694	{	979	{
695	ev_periodic_stop (w);	980	ev_periodic_stop (EV_A_ w);
696	ev_periodic_start (w);	981	ev_periodic_start (EV_A_ w);
697		982
698	i = 0; /* restart loop, inefficient, but time jumps should be rare */	983	i = 0; /* restart loop, inefficient, but time jumps should be rare */
699	}	984	}
700	}	985	}
701	}	986	}
702	}	987	}
703		988
704	static int	989	inline int
705	time_update_monotonic (void)	990	time_update_monotonic (EV_P)
706	{	991	{
707	now = get_clock ();	992	mn_now = get_clock ();
708		993
709	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	994	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
710	{	995	{
711	ev_now = now + diff;	996	rt_now = rtmn_diff + mn_now;
712	return 0;	997	return 0;
713	}	998	}
714	else	999	else
715	{	1000	{
716	now_floor = now;	1001	now_floor = mn_now;
717	ev_now = ev_time ();	1002	rt_now = ev_time ();
718	return 1;	1003	return 1;
719	}	1004	}
720	}	1005	}
721		1006
722	static void	1007	static void
723	time_update (void)	1008	time_update (EV_P)
724	{	1009	{
725	int i;	1010	int i;
726		1011
727	#if EV_USE_MONOTONIC	1012	#if EV_USE_MONOTONIC
728	if (expect_true (have_monotonic))	1013	if (expect_true (have_monotonic))
729	{	1014	{
730	if (time_update_monotonic ())	1015	if (time_update_monotonic (EV_A))
731	{	1016	{
732	ev_tstamp odiff = diff;	1017	ev_tstamp odiff = rtmn_diff;
733		1018
734	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1019	for (i = 4; --i; ) /* loop a few times, before making important decisions */
735	{	1020	{
736	diff = ev_now - now;	1021	rtmn_diff = rt_now - mn_now;
737		1022
738	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1023	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
739	return; /* all is well */	1024	return; /* all is well */
740		1025
741	ev_now = ev_time ();	1026	rt_now = ev_time ();
742	now = get_clock ();	1027	mn_now = get_clock ();
743	now_floor = now;	1028	now_floor = mn_now;
744	}	1029	}
745		1030
746	periodics_reschedule (diff - odiff);	1031	periodics_reschedule (EV_A);
747	/* no timer adjustment, as the monotonic clock doesn't jump */	1032	/* no timer adjustment, as the monotonic clock doesn't jump */
		1033	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
748	}	1034	}
749	}	1035	}
750	else	1036	else
751	#endif	1037	#endif
752	{	1038	{
753	ev_now = ev_time ();	1039	rt_now = ev_time ();
754		1040
755	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1041	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
756	{	1042	{
757	periodics_reschedule (ev_now - now);	1043	periodics_reschedule (EV_A);
758		1044
759	/* adjust timers. this is easy, as the offset is the same for all */	1045	/* adjust timers. this is easy, as the offset is the same for all */
760	for (i = 0; i < timercnt; ++i)	1046	for (i = 0; i < timercnt; ++i)
761	timers [i]->at += diff;	1047	((WT)timers [i])->at += rt_now - mn_now;
762	}	1048	}
763		1049
764	now = ev_now;	1050	mn_now = rt_now;
765	}	1051	}
766	}	1052	}
767		1053
768	int ev_loop_done;	1054	void
		1055	ev_ref (EV_P)
		1056	{
		1057	++activecnt;
		1058	}
769		1059
		1060	void
		1061	ev_unref (EV_P)
		1062	{
		1063	--activecnt;
		1064	}
		1065
		1066	static int loop_done;
		1067
		1068	void
770	void ev_loop (int flags)	1069	ev_loop (EV_P_ int flags)
771	{	1070	{
772	double block;	1071	double block;
773	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1072	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
774		1073
775	do	1074	do
776	{	1075	{
777	/* queue check watchers (and execute them) */	1076	/* queue check watchers (and execute them) */
778	if (expect_false (preparecnt))	1077	if (expect_false (preparecnt))
779	{	1078	{
780	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1079	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
781	call_pending ();	1080	call_pending (EV_A);
782	}	1081	}
783		1082
		1083	/* we might have forked, so reify kernel state if necessary */
		1084	if (expect_false (postfork))
		1085	loop_fork (EV_A);
		1086
784	/* update fd-related kernel structures */	1087	/* update fd-related kernel structures */
785	fd_reify ();	1088	fd_reify (EV_A);
786		1089
787	/* calculate blocking time */	1090	/* calculate blocking time */
788		1091
789	/* we only need this for !monotonic clockor timers, but as we basically	1092	/* we only need this for !monotonic clockor timers, but as we basically
790	always have timers, we just calculate it always */	1093	always have timers, we just calculate it always */
791	#if EV_USE_MONOTONIC	1094	#if EV_USE_MONOTONIC
792	if (expect_true (have_monotonic))	1095	if (expect_true (have_monotonic))
793	time_update_monotonic ();	1096	time_update_monotonic (EV_A);
794	else	1097	else
795	#endif	1098	#endif
796	{	1099	{
797	ev_now = ev_time ();	1100	rt_now = ev_time ();
798	now = ev_now;	1101	mn_now = rt_now;
799	}	1102	}
800		1103
801	if (flags & EVLOOP_NONBLOCK || idlecnt)	1104	if (flags & EVLOOP_NONBLOCK || idlecnt)
802	block = 0.;	1105	block = 0.;
803	else	1106	else
804	{	1107	{
805	block = MAX_BLOCKTIME;	1108	block = MAX_BLOCKTIME;
806		1109
807	if (timercnt)	1110	if (timercnt)
808	{	1111	{
809	ev_tstamp to = timers [0]->at - now + method_fudge;	1112	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
810	if (block > to) block = to;	1113	if (block > to) block = to;
811	}	1114	}
812		1115
813	if (periodiccnt)	1116	if (periodiccnt)
814	{	1117	{
815	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1118	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
816	if (block > to) block = to;	1119	if (block > to) block = to;
817	}	1120	}
818		1121
819	if (block < 0.) block = 0.;	1122	if (block < 0.) block = 0.;
820	}	1123	}
821		1124
822	method_poll (block);	1125	method_poll (EV_A_ block);
823		1126
824	/* update ev_now, do magic */	1127	/* update rt_now, do magic */
825	time_update ();	1128	time_update (EV_A);
826		1129
827	/* queue pending timers and reschedule them */	1130	/* queue pending timers and reschedule them */
828	timers_reify (); /* relative timers called last */	1131	timers_reify (EV_A); /* relative timers called last */
829	periodics_reify (); /* absolute timers called first */	1132	periodics_reify (EV_A); /* absolute timers called first */
830		1133
831	/* queue idle watchers unless io or timers are pending */	1134	/* queue idle watchers unless io or timers are pending */
832	if (!pendingcnt)	1135	if (!pendingcnt)
833	queue_events ((W *)idles, idlecnt, EV_IDLE);	1136	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
834		1137
835	/* queue check watchers, to be executed first */	1138	/* queue check watchers, to be executed first */
836	if (checkcnt)	1139	if (checkcnt)
837	queue_events ((W *)checks, checkcnt, EV_CHECK);	1140	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
838		1141
839	call_pending ();	1142	call_pending (EV_A);
840	}	1143	}
841	while (!ev_loop_done);	1144	while (activecnt && !loop_done);
842		1145
843	if (ev_loop_done != 2)	1146	if (loop_done != 2)
844	ev_loop_done = 0;	1147	loop_done = 0;
		1148	}
		1149
		1150	void
		1151	ev_unloop (EV_P_ int how)
		1152	{
		1153	loop_done = how;
845	}	1154	}
846		1155
847	/*****************************************************************************/	1156	/*****************************************************************************/
848		1157
849	static void	1158	inline void
850	wlist_add (WL *head, WL elem)	1159	wlist_add (WL *head, WL elem)
851	{	1160	{
852	elem->next = *head;	1161	elem->next = *head;
853	*head = elem;	1162	*head = elem;
854	}	1163	}
855		1164
856	static void	1165	inline void
857	wlist_del (WL *head, WL elem)	1166	wlist_del (WL *head, WL elem)
858	{	1167	{
859	while (*head)	1168	while (*head)
860	{	1169	{
861	if (*head == elem)	1170	if (*head == elem)
…		…
866		1175
867	head = &(*head)->next;	1176	head = &(*head)->next;
868	}	1177	}
869	}	1178	}
870		1179
871	static void	1180	inline void
872	ev_clear_pending (W w)	1181	ev_clear_pending (EV_P_ W w)
873	{	1182	{
874	if (w->pending)	1183	if (w->pending)
875	{	1184	{
876	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1185	pendings [ABSPRI (w)][w->pending - 1].w = 0;
877	w->pending = 0;	1186	w->pending = 0;
878	}	1187	}
879	}	1188	}
880		1189
881	static void	1190	inline void
882	ev_start (W w, int active)	1191	ev_start (EV_P_ W w, int active)
883	{	1192	{
884	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1193	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
885	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1194	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
886		1195
887	w->active = active;	1196	w->active = active;
		1197	ev_ref (EV_A);
888	}	1198	}
889		1199
890	static void	1200	inline void
891	ev_stop (W w)	1201	ev_stop (EV_P_ W w)
892	{	1202	{
		1203	ev_unref (EV_A);
893	w->active = 0;	1204	w->active = 0;
894	}	1205	}
895		1206
896	/*****************************************************************************/	1207	/*****************************************************************************/
897		1208
898	void	1209	void
899	ev_io_start (struct ev_io *w)	1210	ev_io_start (EV_P_ struct ev_io *w)
900	{	1211	{
901	int fd = w->fd;	1212	int fd = w->fd;
902		1213
903	if (ev_is_active (w))	1214	if (ev_is_active (w))
904	return;	1215	return;
905		1216
906	assert (("ev_io_start called with negative fd", fd >= 0));	1217	assert (("ev_io_start called with negative fd", fd >= 0));
907		1218
908	ev_start ((W)w, 1);	1219	ev_start (EV_A_ (W)w, 1);
909	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1220	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
910	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1221	wlist_add ((WL *)&anfds[fd].head, (WL)w);
911		1222
912	fd_change (fd);	1223	fd_change (EV_A_ fd);
913	}	1224	}
914		1225
915	void	1226	void
916	ev_io_stop (struct ev_io *w)	1227	ev_io_stop (EV_P_ struct ev_io *w)
917	{	1228	{
918	ev_clear_pending ((W)w);	1229	ev_clear_pending (EV_A_ (W)w);
919	if (!ev_is_active (w))	1230	if (!ev_is_active (w))
920	return;	1231	return;
921		1232
922	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1233	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
923	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
924		1235
925	fd_change (w->fd);	1236	fd_change (EV_A_ w->fd);
926	}	1237	}
927		1238
928	void	1239	void
929	ev_timer_start (struct ev_timer *w)	1240	ev_timer_start (EV_P_ struct ev_timer *w)
930	{	1241	{
931	if (ev_is_active (w))	1242	if (ev_is_active (w))
932	return;	1243	return;
933		1244
934	w->at += now;	1245	((WT)w)->at += mn_now;
935		1246
936	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1247	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
937		1248
938	ev_start ((W)w, ++timercnt);	1249	ev_start (EV_A_ (W)w, ++timercnt);
939	array_needsize (timers, timermax, timercnt, );	1250	array_needsize (timers, timermax, timercnt, (void));
940	timers [timercnt - 1] = w;	1251	timers [timercnt - 1] = w;
941	upheap ((WT *)timers, timercnt - 1);	1252	upheap ((WT *)timers, timercnt - 1);
942	}
943		1253
		1254	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1255	}
		1256
944	void	1257	void
945	ev_timer_stop (struct ev_timer *w)	1258	ev_timer_stop (EV_P_ struct ev_timer *w)
946	{	1259	{
947	ev_clear_pending ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
948	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
949	return;	1262	return;
950		1263
		1264	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1265
951	if (w->active < timercnt--)	1266	if (((W)w)->active < timercnt--)
952	{	1267	{
953	timers [w->active - 1] = timers [timercnt];	1268	timers [((W)w)->active - 1] = timers [timercnt];
954	downheap ((WT *)timers, timercnt, w->active - 1);	1269	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
955	}	1270	}
956		1271
957	w->at = w->repeat;	1272	((WT)w)->at = w->repeat;
958		1273
959	ev_stop ((W)w);	1274	ev_stop (EV_A_ (W)w);
960	}	1275	}
961		1276
962	void	1277	void
963	ev_timer_again (struct ev_timer *w)	1278	ev_timer_again (EV_P_ struct ev_timer *w)
964	{	1279	{
965	if (ev_is_active (w))	1280	if (ev_is_active (w))
966	{	1281	{
967	if (w->repeat)	1282	if (w->repeat)
968	{	1283	{
969	w->at = now + w->repeat;	1284	((WT)w)->at = mn_now + w->repeat;
970	downheap ((WT *)timers, timercnt, w->active - 1);	1285	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
971	}	1286	}
972	else	1287	else
973	ev_timer_stop (w);	1288	ev_timer_stop (EV_A_ w);
974	}	1289	}
975	else if (w->repeat)	1290	else if (w->repeat)
976	ev_timer_start (w);	1291	ev_timer_start (EV_A_ w);
977	}	1292	}
978		1293
979	void	1294	void
980	ev_periodic_start (struct ev_periodic *w)	1295	ev_periodic_start (EV_P_ struct ev_periodic *w)
981	{	1296	{
982	if (ev_is_active (w))	1297	if (ev_is_active (w))
983	return;	1298	return;
984		1299
985	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1300	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
986		1301
987	/* this formula differs from the one in periodic_reify because we do not always round up */	1302	/* this formula differs from the one in periodic_reify because we do not always round up */
988	if (w->interval)	1303	if (w->interval)
989	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1304	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
990		1305
991	ev_start ((W)w, ++periodiccnt);	1306	ev_start (EV_A_ (W)w, ++periodiccnt);
992	array_needsize (periodics, periodicmax, periodiccnt, );	1307	array_needsize (periodics, periodicmax, periodiccnt, (void));
993	periodics [periodiccnt - 1] = w;	1308	periodics [periodiccnt - 1] = w;
994	upheap ((WT *)periodics, periodiccnt - 1);	1309	upheap ((WT *)periodics, periodiccnt - 1);
995	}
996		1310
		1311	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1312	}
		1313
997	void	1314	void
998	ev_periodic_stop (struct ev_periodic *w)	1315	ev_periodic_stop (EV_P_ struct ev_periodic *w)
999	{	1316	{
1000	ev_clear_pending ((W)w);	1317	ev_clear_pending (EV_A_ (W)w);
1001	if (!ev_is_active (w))	1318	if (!ev_is_active (w))
1002	return;	1319	return;
1003		1320
		1321	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1322
1004	if (w->active < periodiccnt--)	1323	if (((W)w)->active < periodiccnt--)
1005	{	1324	{
1006	periodics [w->active - 1] = periodics [periodiccnt];	1325	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1007	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1326	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1008	}	1327	}
1009		1328
1010	ev_stop ((W)w);	1329	ev_stop (EV_A_ (W)w);
1011	}	1330	}
1012		1331
1013	void	1332	void
1014	ev_signal_start (struct ev_signal *w)	1333	ev_idle_start (EV_P_ struct ev_idle *w)
1015	{	1334	{
1016	if (ev_is_active (w))	1335	if (ev_is_active (w))
1017	return;	1336	return;
1018		1337
		1338	ev_start (EV_A_ (W)w, ++idlecnt);
		1339	array_needsize (idles, idlemax, idlecnt, (void));
		1340	idles [idlecnt - 1] = w;
		1341	}
		1342
		1343	void
		1344	ev_idle_stop (EV_P_ struct ev_idle *w)
		1345	{
		1346	ev_clear_pending (EV_A_ (W)w);
		1347	if (ev_is_active (w))
		1348	return;
		1349
		1350	idles [((W)w)->active - 1] = idles [--idlecnt];
		1351	ev_stop (EV_A_ (W)w);
		1352	}
		1353
		1354	void
		1355	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1356	{
		1357	if (ev_is_active (w))
		1358	return;
		1359
		1360	ev_start (EV_A_ (W)w, ++preparecnt);
		1361	array_needsize (prepares, preparemax, preparecnt, (void));
		1362	prepares [preparecnt - 1] = w;
		1363	}
		1364
		1365	void
		1366	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1367	{
		1368	ev_clear_pending (EV_A_ (W)w);
		1369	if (ev_is_active (w))
		1370	return;
		1371
		1372	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1373	ev_stop (EV_A_ (W)w);
		1374	}
		1375
		1376	void
		1377	ev_check_start (EV_P_ struct ev_check *w)
		1378	{
		1379	if (ev_is_active (w))
		1380	return;
		1381
		1382	ev_start (EV_A_ (W)w, ++checkcnt);
		1383	array_needsize (checks, checkmax, checkcnt, (void));
		1384	checks [checkcnt - 1] = w;
		1385	}
		1386
		1387	void
		1388	ev_check_stop (EV_P_ struct ev_check *w)
		1389	{
		1390	ev_clear_pending (EV_A_ (W)w);
		1391	if (ev_is_active (w))
		1392	return;
		1393
		1394	checks [((W)w)->active - 1] = checks [--checkcnt];
		1395	ev_stop (EV_A_ (W)w);
		1396	}
		1397
		1398	#ifndef SA_RESTART
		1399	# define SA_RESTART 0
		1400	#endif
		1401
		1402	void
		1403	ev_signal_start (EV_P_ struct ev_signal *w)
		1404	{
		1405	#if EV_MULTIPLICITY
		1406	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1407	#endif
		1408	if (ev_is_active (w))
		1409	return;
		1410
1019	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1411	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1020		1412
1021	ev_start ((W)w, 1);	1413	ev_start (EV_A_ (W)w, 1);
1022	array_needsize (signals, signalmax, w->signum, signals_init);	1414	array_needsize (signals, signalmax, w->signum, signals_init);
1023	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1415	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1024		1416
1025	if (!w->next)	1417	if (!((WL)w)->next)
1026	{	1418	{
		1419	#if WIN32
		1420	signal (w->signum, sighandler);
		1421	#else
1027	struct sigaction sa;	1422	struct sigaction sa;
1028	sa.sa_handler = sighandler;	1423	sa.sa_handler = sighandler;
1029	sigfillset (&sa.sa_mask);	1424	sigfillset (&sa.sa_mask);
1030	sa.sa_flags = 0;	1425	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1031	sigaction (w->signum, &sa, 0);	1426	sigaction (w->signum, &sa, 0);
		1427	#endif
1032	}	1428	}
1033	}	1429	}
1034		1430
1035	void	1431	void
1036	ev_signal_stop (struct ev_signal *w)	1432	ev_signal_stop (EV_P_ struct ev_signal *w)
1037	{	1433	{
1038	ev_clear_pending ((W)w);	1434	ev_clear_pending (EV_A_ (W)w);
1039	if (!ev_is_active (w))	1435	if (!ev_is_active (w))
1040	return;	1436	return;
1041		1437
1042	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1438	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1043	ev_stop ((W)w);	1439	ev_stop (EV_A_ (W)w);
1044		1440
1045	if (!signals [w->signum - 1].head)	1441	if (!signals [w->signum - 1].head)
1046	signal (w->signum, SIG_DFL);	1442	signal (w->signum, SIG_DFL);
1047	}	1443	}
1048		1444
1049	void	1445	void
1050	ev_idle_start (struct ev_idle *w)	1446	ev_child_start (EV_P_ struct ev_child *w)
1051	{	1447	{
		1448	#if EV_MULTIPLICITY
		1449	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1450	#endif
1052	if (ev_is_active (w))	1451	if (ev_is_active (w))
1053	return;	1452	return;
1054		1453
1055	ev_start ((W)w, ++idlecnt);	1454	ev_start (EV_A_ (W)w, 1);
1056	array_needsize (idles, idlemax, idlecnt, );	1455	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1057	idles [idlecnt - 1] = w;
1058	}	1456	}
1059		1457
1060	void	1458	void
1061	ev_idle_stop (struct ev_idle *w)	1459	ev_child_stop (EV_P_ struct ev_child *w)
1062	{	1460	{
1063	ev_clear_pending ((W)w);	1461	ev_clear_pending (EV_A_ (W)w);
1064	if (ev_is_active (w))	1462	if (ev_is_active (w))
1065	return;	1463	return;
1066		1464
1067	idles [w->active - 1] = idles [--idlecnt];
1068	ev_stop ((W)w);
1069	}
1070
1071	void
1072	ev_prepare_start (struct ev_prepare *w)
1073	{
1074	if (ev_is_active (w))
1075	return;
1076
1077	ev_start ((W)w, ++preparecnt);
1078	array_needsize (prepares, preparemax, preparecnt, );
1079	prepares [preparecnt - 1] = w;
1080	}
1081
1082	void
1083	ev_prepare_stop (struct ev_prepare *w)
1084	{
1085	ev_clear_pending ((W)w);
1086	if (ev_is_active (w))
1087	return;
1088
1089	prepares [w->active - 1] = prepares [--preparecnt];
1090	ev_stop ((W)w);
1091	}
1092
1093	void
1094	ev_check_start (struct ev_check *w)
1095	{
1096	if (ev_is_active (w))
1097	return;
1098
1099	ev_start ((W)w, ++checkcnt);
1100	array_needsize (checks, checkmax, checkcnt, );
1101	checks [checkcnt - 1] = w;
1102	}
1103
1104	void
1105	ev_check_stop (struct ev_check *w)
1106	{
1107	ev_clear_pending ((W)w);
1108	if (ev_is_active (w))
1109	return;
1110
1111	checks [w->active - 1] = checks [--checkcnt];
1112	ev_stop ((W)w);
1113	}
1114
1115	void
1116	ev_child_start (struct ev_child *w)
1117	{
1118	if (ev_is_active (w))
1119	return;
1120
1121	ev_start ((W)w, 1);
1122	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1123	}
1124
1125	void
1126	ev_child_stop (struct ev_child *w)
1127	{
1128	ev_clear_pending ((W)w);
1129	if (ev_is_active (w))
1130	return;
1131
1132	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1465	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1133	ev_stop ((W)w);	1466	ev_stop (EV_A_ (W)w);
1134	}	1467	}
1135		1468
1136	/*****************************************************************************/	1469	/*****************************************************************************/
1137		1470
1138	struct ev_once	1471	struct ev_once
…		…
1142	void (*cb)(int revents, void *arg);	1475	void (*cb)(int revents, void *arg);
1143	void *arg;	1476	void *arg;
1144	};	1477	};
1145		1478
1146	static void	1479	static void
1147	once_cb (struct ev_once *once, int revents)	1480	once_cb (EV_P_ struct ev_once *once, int revents)
1148	{	1481	{
1149	void (*cb)(int revents, void *arg) = once->cb;	1482	void (*cb)(int revents, void *arg) = once->cb;
1150	void *arg = once->arg;	1483	void *arg = once->arg;
1151		1484
1152	ev_io_stop (&once->io);	1485	ev_io_stop (EV_A_ &once->io);
1153	ev_timer_stop (&once->to);	1486	ev_timer_stop (EV_A_ &once->to);
1154	free (once);	1487	ev_free (once);
1155		1488
1156	cb (revents, arg);	1489	cb (revents, arg);
1157	}	1490	}
1158		1491
1159	static void	1492	static void
1160	once_cb_io (struct ev_io *w, int revents)	1493	once_cb_io (EV_P_ struct ev_io *w, int revents)
1161	{	1494	{
1162	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1495	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1163	}	1496	}
1164		1497
1165	static void	1498	static void
1166	once_cb_to (struct ev_timer *w, int revents)	1499	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1167	{	1500	{
1168	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1501	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1169	}	1502	}
1170		1503
1171	void	1504	void
1172	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1505	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1173	{	1506	{
1174	struct ev_once *once = malloc (sizeof (struct ev_once));	1507	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1175		1508
1176	if (!once)	1509	if (!once)
1177	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1510	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1178	else	1511	else
1179	{	1512	{
…		…
1182		1515
1183	ev_watcher_init (&once->io, once_cb_io);	1516	ev_watcher_init (&once->io, once_cb_io);
1184	if (fd >= 0)	1517	if (fd >= 0)
1185	{	1518	{
1186	ev_io_set (&once->io, fd, events);	1519	ev_io_set (&once->io, fd, events);
1187	ev_io_start (&once->io);	1520	ev_io_start (EV_A_ &once->io);
1188	}	1521	}
1189		1522
1190	ev_watcher_init (&once->to, once_cb_to);	1523	ev_watcher_init (&once->to, once_cb_to);
1191	if (timeout >= 0.)	1524	if (timeout >= 0.)
1192	{	1525	{
1193	ev_timer_set (&once->to, timeout, 0.);	1526	ev_timer_set (&once->to, timeout, 0.);
1194	ev_timer_start (&once->to);	1527	ev_timer_start (EV_A_ &once->to);
1195	}	1528	}
1196	}	1529	}
1197	}	1530	}
1198		1531
1199	/*****************************************************************************/
1200
1201	#if 0
1202
1203	struct ev_io wio;
1204
1205	static void
1206	sin_cb (struct ev_io *w, int revents)
1207	{
1208	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1209	}
1210
1211	static void
1212	ocb (struct ev_timer *w, int revents)
1213	{
1214	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1215	ev_timer_stop (w);
1216	ev_timer_start (w);
1217	}
1218
1219	static void
1220	scb (struct ev_signal *w, int revents)
1221	{
1222	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1223	ev_io_stop (&wio);
1224	ev_io_start (&wio);
1225	}
1226
1227	static void
1228	gcb (struct ev_signal *w, int revents)
1229	{
1230	fprintf (stderr, "generic %x\n", revents);
1231
1232	}
1233
1234	int main (void)
1235	{
1236	ev_init (0);
1237
1238	ev_io_init (&wio, sin_cb, 0, EV_READ);
1239	ev_io_start (&wio);
1240
1241	struct ev_timer t[10000];
1242
1243	#if 0
1244	int i;
1245	for (i = 0; i < 10000; ++i)
1246	{
1247	struct ev_timer *w = t + i;
1248	ev_watcher_init (w, ocb, i);
1249	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1250	ev_timer_start (w);
1251	if (drand48 () < 0.5)
1252	ev_timer_stop (w);
1253	}
1254	#endif
1255
1256	struct ev_timer t1;
1257	ev_timer_init (&t1, ocb, 5, 10);
1258	ev_timer_start (&t1);
1259
1260	struct ev_signal sig;
1261	ev_signal_init (&sig, scb, SIGQUIT);
1262	ev_signal_start (&sig);
1263
1264	struct ev_check cw;
1265	ev_check_init (&cw, gcb);
1266	ev_check_start (&cw);
1267
1268	struct ev_idle iw;
1269	ev_idle_init (&iw, gcb);
1270	ev_idle_start (&iw);
1271
1272	ev_loop (0);
1273
1274	return 0;
1275	}
1276
1277	#endif
1278
1279
1280
1281

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