[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.70 by root, Tue Nov 6 00:52:32 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
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
63	#endif	103	#endif
64		104
65	#ifndef EV_USE_REALTIME	105	#ifndef EV_USE_REALTIME
66	# define EV_USE_REALTIME 1	106	# define EV_USE_REALTIME 1
67	#endif	107	#endif
…		…
96	#endif	136	#endif
97		137
98	#define expect_false(expr) expect ((expr) != 0, 0)	138	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	139	#define expect_true(expr) expect ((expr) != 0, 1)
100		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		143
101	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
104		147
105	static ev_tstamp now_floor, now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
106	ev_tstamp ev_now;
107	int ev_method;
108		149
109	static int have_monotonic; /* runtime */	150	#if WIN32
110		151	/* note: the comment below could not be substantiated, but what would I care */
111	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
112	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
113	static void (*method_poll)(ev_tstamp timeout);	154	#endif
114		155
115	/*****************************************************************************/	156	/*****************************************************************************/
116		157
117	ev_tstamp	158	static void (syserr_cb)(const char msg);
		159
		160	void ev_set_syserr_cb (void (cb)(const char msg))
		161	{
		162	syserr_cb = cb;
		163	}
		164
		165	static void
		166	syserr (const char *msg)
		167	{
		168	if (!msg)
		169	msg = "(libev) system error";
		170
		171	if (syserr_cb)
		172	syserr_cb (msg);
		173	else
		174	{
		175	perror (msg);
		176	abort ();
		177	}
		178	}
		179
		180	static void (alloc)(void *ptr, long size);
		181
		182	void ev_set_allocator (void (cb)(void *ptr, long size))
		183	{
		184	alloc = cb;
		185	}
		186
		187	static void *
		188	ev_realloc (void *ptr, long size)
		189	{
		190	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		191
		192	if (!ptr && size)
		193	{
		194	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		195	abort ();
		196	}
		197
		198	return ptr;
		199	}
		200
		201	#define ev_malloc(size) ev_realloc (0, (size))
		202	#define ev_free(ptr) ev_realloc ((ptr), 0)
		203
		204	/*****************************************************************************/
		205
		206	typedef struct
		207	{
		208	WL head;
		209	unsigned char events;
		210	unsigned char reify;
		211	} ANFD;
		212
		213	typedef struct
		214	{
		215	W w;
		216	int events;
		217	} ANPENDING;
		218
		219	#if EV_MULTIPLICITY
		220
		221	struct ev_loop
		222	{
		223	# define VAR(name,decl) decl;
		224	# include "ev_vars.h"
		225	};
		226	# undef VAR
		227	# include "ev_wrap.h"
		228
		229	#else
		230
		231	# define VAR(name,decl) static decl;
		232	# include "ev_vars.h"
		233	# undef VAR
		234
		235	#endif
		236
		237	/*****************************************************************************/
		238
		239	inline ev_tstamp
118	ev_time (void)	240	ev_time (void)
119	{	241	{
120	#if EV_USE_REALTIME	242	#if EV_USE_REALTIME
121	struct timespec ts;	243	struct timespec ts;
122	clock_gettime (CLOCK_REALTIME, &ts);	244	clock_gettime (CLOCK_REALTIME, &ts);
…		…
126	gettimeofday (&tv, 0);	248	gettimeofday (&tv, 0);
127	return tv.tv_sec + tv.tv_usec * 1e-6;	249	return tv.tv_sec + tv.tv_usec * 1e-6;
128	#endif	250	#endif
129	}	251	}
130		252
131	static ev_tstamp	253	inline ev_tstamp
132	get_clock (void)	254	get_clock (void)
133	{	255	{
134	#if EV_USE_MONOTONIC	256	#if EV_USE_MONOTONIC
135	if (expect_true (have_monotonic))	257	if (expect_true (have_monotonic))
136	{	258	{
…		…
141	#endif	263	#endif
142		264
143	return ev_time ();	265	return ev_time ();
144	}	266	}
145		267
		268	ev_tstamp
		269	ev_now (EV_P)
		270	{
		271	return rt_now;
		272	}
		273
146	#define array_roundsize(base,n) ((n) \| 4 & ~3)	274	#define array_roundsize(base,n) ((n) \| 4 & ~3)
147		275
148	#define array_needsize(base,cur,cnt,init) \	276	#define array_needsize(base,cur,cnt,init) \
149	if (expect_false ((cnt) > cur)) \	277	if (expect_false ((cnt) > cur)) \
150	{ \	278	{ \
151	int newcnt = cur; \	279	int newcnt = cur; \
152	do \	280	do \
153	{ \	281	{ \
154	newcnt = array_roundsize (base, newcnt << 1); \	282	newcnt = array_roundsize (base, newcnt << 1); \
155	} \	283	} \
156	while ((cnt) > newcnt); \	284	while ((cnt) > newcnt); \
157	\	285	\
158	base = realloc (base, sizeof (base) (newcnt)); \	286	base = ev_realloc (base, sizeof (base) (newcnt)); \
159	init (base + cur, newcnt - cur); \	287	init (base + cur, newcnt - cur); \
160	cur = newcnt; \	288	cur = newcnt; \
161	}	289	}
		290
		291	#define array_slim(stem) \
		292	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		293	{ \
		294	stem ## max = array_roundsize (stem ## cnt >> 1); \
		295	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		296	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		297	}
		298
		299	#define array_free(stem, idx) \
		300	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
162		301
163	/*****************************************************************************/	302	/*****************************************************************************/
164
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		303
175	static void	304	static void
176	anfds_init (ANFD *base, int count)	305	anfds_init (ANFD *base, int count)
177	{	306	{
178	while (count--)	307	while (count--)
…		…
183		312
184	++base;	313	++base;
185	}	314	}
186	}	315	}
187		316
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	317	static void
198	event (W w, int events)	318	event (EV_P_ W w, int events)
199	{	319	{
200	if (w->pending)	320	if (w->pending)
201	{	321	{
202	pendings [w->pending - 1].events \|= events;	322	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
203	return;	323	return;
204	}	324	}
205		325
206	w->pending = ++pendingcnt;	326	w->pending = ++pendingcnt [ABSPRI (w)];
207	array_needsize (pendings, pendingmax, pendingcnt, );	327	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
208	pendings [pendingcnt - 1].w = w;	328	pendings [ABSPRI (w)][w->pending - 1].w = w;
209	pendings [pendingcnt - 1].events = events;	329	pendings [ABSPRI (w)][w->pending - 1].events = events;
210	}	330	}
211		331
212	static void	332	static void
213	queue_events (W *events, int eventcnt, int type)	333	queue_events (EV_P_ W *events, int eventcnt, int type)
214	{	334	{
215	int i;	335	int i;
216		336
217	for (i = 0; i < eventcnt; ++i)	337	for (i = 0; i < eventcnt; ++i)
218	event (events [i], type);	338	event (EV_A_ events [i], type);
219	}	339	}
220		340
221	static void	341	static void
222	fd_event (int fd, int events)	342	fd_event (EV_P_ int fd, int events)
223	{	343	{
224	ANFD *anfd = anfds + fd;	344	ANFD *anfd = anfds + fd;
225	struct ev_io *w;	345	struct ev_io *w;
226		346
227	for (w = anfd->head; w; w = w->next)	347	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
228	{	348	{
229	int ev = w->events & events;	349	int ev = w->events & events;
230		350
231	if (ev)	351	if (ev)
232	event ((W)w, ev);	352	event (EV_A_ (W)w, ev);
233	}	353	}
234	}	354	}
235		355
236	/*****************************************************************************/	356	/*****************************************************************************/
237		357
238	static int *fdchanges;
239	static int fdchangemax, fdchangecnt;
240
241	static void	358	static void
242	fd_reify (void)	359	fd_reify (EV_P)
243	{	360	{
244	int i;	361	int i;
245		362
246	for (i = 0; i < fdchangecnt; ++i)	363	for (i = 0; i < fdchangecnt; ++i)
247	{	364	{
…		…
249	ANFD *anfd = anfds + fd;	366	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	367	struct ev_io *w;
251		368
252	int events = 0;	369	int events = 0;
253		370
254	for (w = anfd->head; w; w = w->next)	371	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
255	events \|= w->events;	372	events \|= w->events;
256		373
257	anfd->reify = 0;	374	anfd->reify = 0;
258		375
259	if (anfd->events != events)
260	{
261	method_modify (fd, anfd->events, events);	376	method_modify (EV_A_ fd, anfd->events, events);
262	anfd->events = events;	377	anfd->events = events;
263	}
264	}	378	}
265		379
266	fdchangecnt = 0;	380	fdchangecnt = 0;
267	}	381	}
268		382
269	static void	383	static void
270	fd_change (int fd)	384	fd_change (EV_P_ int fd)
271	{	385	{
272	if (anfds [fd].reify \|\| fdchangecnt < 0)	386	if (anfds [fd].reify)
273	return;	387	return;
274		388
275	anfds [fd].reify = 1;	389	anfds [fd].reify = 1;
276		390
277	++fdchangecnt;	391	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	392	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
279	fdchanges [fdchangecnt - 1] = fd;	393	fdchanges [fdchangecnt - 1] = fd;
280	}	394	}
281		395
		396	static void
		397	fd_kill (EV_P_ int fd)
		398	{
		399	struct ev_io *w;
		400
		401	while ((w = (struct ev_io *)anfds [fd].head))
		402	{
		403	ev_io_stop (EV_A_ w);
		404	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		405	}
		406	}
		407
282	/* called on EBADF to verify fds */	408	/* called on EBADF to verify fds */
283	static void	409	static void
284	fd_recheck (void)	410	fd_ebadf (EV_P)
285	{	411	{
286	int fd;	412	int fd;
287		413
288	for (fd = 0; fd < anfdmax; ++fd)	414	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	415	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	416	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
291	while (anfds [fd].head)	417	fd_kill (EV_A_ fd);
		418	}
		419
		420	/* called on ENOMEM in select/poll to kill some fds and retry */
		421	static void
		422	fd_enomem (EV_P)
		423	{
		424	int fd;
		425
		426	for (fd = anfdmax; fd--; )
		427	if (anfds [fd].events)
292	{	428	{
293	ev_io_stop (anfds [fd].head);	429	fd_kill (EV_A_ fd);
294	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	430	return;
295	}	431	}
		432	}
		433
		434	/* usually called after fork if method needs to re-arm all fds from scratch */
		435	static void
		436	fd_rearm_all (EV_P)
		437	{
		438	int fd;
		439
		440	/* this should be highly optimised to not do anything but set a flag */
		441	for (fd = 0; fd < anfdmax; ++fd)
		442	if (anfds [fd].events)
		443	{
		444	anfds [fd].events = 0;
		445	fd_change (EV_A_ fd);
		446	}
296	}	447	}
297		448
298	/*****************************************************************************/	449	/*****************************************************************************/
299		450
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	451	static void
307	upheap (WT *timers, int k)	452	upheap (WT *heap, int k)
308	{	453	{
309	WT w = timers [k];	454	WT w = heap [k];
310		455
311	while (k && timers [k >> 1]->at > w->at)	456	while (k && heap [k >> 1]->at > w->at)
312	{	457	{
313	timers [k] = timers [k >> 1];	458	heap [k] = heap [k >> 1];
314	timers [k]->active = k + 1;	459	((W)heap [k])->active = k + 1;
315	k >>= 1;	460	k >>= 1;
316	}	461	}
317		462
318	timers [k] = w;	463	heap [k] = w;
319	timers [k]->active = k + 1;	464	((W)heap [k])->active = k + 1;
320		465
321	}	466	}
322		467
323	static void	468	static void
324	downheap (WT *timers, int N, int k)	469	downheap (WT *heap, int N, int k)
325	{	470	{
326	WT w = timers [k];	471	WT w = heap [k];
327		472
328	while (k < (N >> 1))	473	while (k < (N >> 1))
329	{	474	{
330	int j = k << 1;	475	int j = k << 1;
331		476
332	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	477	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
333	++j;	478	++j;
334		479
335	if (w->at <= timers [j]->at)	480	if (w->at <= heap [j]->at)
336	break;	481	break;
337		482
338	timers [k] = timers [j];	483	heap [k] = heap [j];
339	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
340	k = j;	485	k = j;
341	}	486	}
342		487
343	timers [k] = w;	488	heap [k] = w;
344	timers [k]->active = k + 1;	489	((W)heap [k])->active = k + 1;
345	}	490	}
346		491
347	/*****************************************************************************/	492	/*****************************************************************************/
348		493
349	typedef struct	494	typedef struct
350	{	495	{
351	struct ev_signal *head;	496	WL head;
352	sig_atomic_t volatile gotsig;	497	sig_atomic_t volatile gotsig;
353	} ANSIG;	498	} ANSIG;
354		499
355	static ANSIG *signals;	500	static ANSIG *signals;
356	static int signalmax;	501	static int signalmax;
…		…
372	}	517	}
373		518
374	static void	519	static void
375	sighandler (int signum)	520	sighandler (int signum)
376	{	521	{
		522	#if WIN32
		523	signal (signum, sighandler);
		524	#endif
		525
377	signals [signum - 1].gotsig = 1;	526	signals [signum - 1].gotsig = 1;
378		527
379	if (!gotsig)	528	if (!gotsig)
380	{	529	{
		530	int old_errno = errno;
381	gotsig = 1;	531	gotsig = 1;
382	write (sigpipe [1], &signum, 1);	532	write (sigpipe [1], &signum, 1);
		533	errno = old_errno;
383	}	534	}
384	}	535	}
385		536
386	static void	537	static void
387	sigcb (struct ev_io *iow, int revents)	538	sigcb (EV_P_ struct ev_io *iow, int revents)
388	{	539	{
389	struct ev_signal *w;	540	WL w;
390	int signum;	541	int signum;
391		542
392	read (sigpipe [0], &revents, 1);	543	read (sigpipe [0], &revents, 1);
393	gotsig = 0;	544	gotsig = 0;
394		545
…		…
396	if (signals [signum].gotsig)	547	if (signals [signum].gotsig)
397	{	548	{
398	signals [signum].gotsig = 0;	549	signals [signum].gotsig = 0;
399		550
400	for (w = signals [signum].head; w; w = w->next)	551	for (w = signals [signum].head; w; w = w->next)
401	event ((W)w, EV_SIGNAL);	552	event (EV_A_ (W)w, EV_SIGNAL);
402	}	553	}
403	}	554	}
404		555
405	static void	556	static void
406	siginit (void)	557	siginit (EV_P)
407	{	558	{
		559	#ifndef WIN32
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	560	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	561	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410		562
411	/* rather than sort out wether we really need nb, set it */	563	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	564	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	565	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		566	#endif
414		567
415	ev_io_set (&sigev, sigpipe [0], EV_READ);	568	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);	569	ev_io_start (EV_A_ &sigev);
		570	ev_unref (EV_A); /* child watcher should not keep loop alive */
417	}	571	}
418		572
419	/*****************************************************************************/	573	/*****************************************************************************/
420		574
421	static struct ev_idle **idles;	575	#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		576
432	static struct ev_child *childs [PID_HASHSIZE];	577	static struct ev_child *childs [PID_HASHSIZE];
433	static struct ev_signal childev;	578	static struct ev_signal childev;
434		579
435	#ifndef WCONTINUED	580	#ifndef WCONTINUED
436	# define WCONTINUED 0	581	# define WCONTINUED 0
437	#endif	582	#endif
438		583
439	static void	584	static void
440	childcb (struct ev_signal *sw, int revents)	585	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
441	{	586	{
442	struct ev_child *w;	587	struct ev_child *w;
		588
		589	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		590	if (w->pid == pid \|\| !w->pid)
		591	{
		592	ev_priority (w) = ev_priority (sw); /* need to do it now */
		593	w->rpid = pid;
		594	w->rstatus = status;
		595	event (EV_A_ (W)w, EV_CHILD);
		596	}
		597	}
		598
		599	static void
		600	childcb (EV_P_ struct ev_signal *sw, int revents)
		601	{
443	int pid, status;	602	int pid, status;
444		603
445	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	604	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	605	{
447	if (w->pid == pid \|\| !w->pid)	606	/* make sure we are called again until all childs have been reaped */
448	{	607	event (EV_A_ (W)sw, EV_SIGNAL);
449	w->status = status;	608
450	event ((W)w, EV_CHILD);	609	child_reap (EV_A_ sw, pid, pid, status);
451	}	610	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		611	}
452	}	612	}
		613
		614	#endif
453		615
454	/*****************************************************************************/	616	/*****************************************************************************/
455		617
		618	#if EV_USE_KQUEUE
		619	# include "ev_kqueue.c"
		620	#endif
456	#if EV_USE_EPOLL	621	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	622	# include "ev_epoll.c"
458	#endif	623	#endif
		624	#if EV_USE_POLL
		625	# include "ev_poll.c"
		626	#endif
459	#if EV_USE_SELECT	627	#if EV_USE_SELECT
460	# include "ev_select.c"	628	# include "ev_select.c"
461	#endif	629	#endif
462		630
463	int	631	int
…		…
470	ev_version_minor (void)	638	ev_version_minor (void)
471	{	639	{
472	return EV_VERSION_MINOR;	640	return EV_VERSION_MINOR;
473	}	641	}
474		642
475	int ev_init (int flags)	643	/* return true if we are running with elevated privileges and should ignore env variables */
		644	static int
		645	enable_secure (void)
476	{	646	{
		647	#ifdef WIN32
		648	return 0;
		649	#else
		650	return getuid () != geteuid ()
		651	\|\| getgid () != getegid ();
		652	#endif
		653	}
		654
		655	int
		656	ev_method (EV_P)
		657	{
		658	return method;
		659	}
		660
		661	static void
		662	loop_init (EV_P_ int methods)
		663	{
477	if (!ev_method)	664	if (!method)
478	{	665	{
479	#if EV_USE_MONOTONIC	666	#if EV_USE_MONOTONIC
480	{	667	{
481	struct timespec ts;	668	struct timespec ts;
482	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	669	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
483	have_monotonic = 1;	670	have_monotonic = 1;
484	}	671	}
485	#endif	672	#endif
486		673
487	ev_now = ev_time ();	674	rt_now = ev_time ();
488	now = get_clock ();	675	mn_now = get_clock ();
489	now_floor = now;	676	now_floor = mn_now;
490	diff = ev_now - now;	677	rtmn_diff = rt_now - mn_now;
491		678
492	if (pipe (sigpipe))	679	if (methods == EVMETHOD_AUTO)
493	return 0;	680	if (!enable_secure () && getenv ("LIBEV_METHODS"))
494		681	methods = atoi (getenv ("LIBEV_METHODS"));
		682	else
495	ev_method = EVMETHOD_NONE;	683	methods = EVMETHOD_ANY;
		684
		685	method = 0;
		686	#if EV_USE_WIN32
		687	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		688	#endif
		689	#if EV_USE_KQUEUE
		690	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		691	#endif
496	#if EV_USE_EPOLL	692	#if EV_USE_EPOLL
497	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	693	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		694	#endif
		695	#if EV_USE_POLL
		696	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
498	#endif	697	#endif
499	#if EV_USE_SELECT	698	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	699	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
501	#endif	700	#endif
502		701
		702	ev_watcher_init (&sigev, sigcb);
		703	ev_set_priority (&sigev, EV_MAXPRI);
		704	}
		705	}
		706
		707	void
		708	loop_destroy (EV_P)
		709	{
		710	int i;
		711
		712	#if EV_USE_WIN32
		713	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		714	#endif
		715	#if EV_USE_KQUEUE
		716	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		717	#endif
		718	#if EV_USE_EPOLL
		719	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		720	#endif
		721	#if EV_USE_POLL
		722	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		723	#endif
		724	#if EV_USE_SELECT
		725	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		726	#endif
		727
		728	for (i = NUMPRI; i--; )
		729	array_free (pending, [i]);
		730
		731	array_free (fdchange, );
		732	array_free (timer, );
		733	array_free (periodic, );
		734	array_free (idle, );
		735	array_free (prepare, );
		736	array_free (check, );
		737
		738	method = 0;
		739	}
		740
		741	static void
		742	loop_fork (EV_P)
		743	{
		744	#if EV_USE_EPOLL
		745	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		746	#endif
		747	#if EV_USE_KQUEUE
		748	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		749	#endif
		750
		751	if (ev_is_active (&sigev))
		752	{
		753	/* default loop */
		754
		755	ev_ref (EV_A);
		756	ev_io_stop (EV_A_ &sigev);
		757	close (sigpipe [0]);
		758	close (sigpipe [1]);
		759
		760	while (pipe (sigpipe))
		761	syserr ("(libev) error creating pipe");
		762
		763	siginit (EV_A);
		764	}
		765
		766	postfork = 0;
		767	}
		768
		769	#if EV_MULTIPLICITY
		770	struct ev_loop *
		771	ev_loop_new (int methods)
		772	{
		773	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		774
		775	memset (loop, 0, sizeof (struct ev_loop));
		776
		777	loop_init (EV_A_ methods);
		778
		779	if (ev_method (EV_A))
		780	return loop;
		781
		782	return 0;
		783	}
		784
		785	void
		786	ev_loop_destroy (EV_P)
		787	{
		788	loop_destroy (EV_A);
		789	ev_free (loop);
		790	}
		791
		792	void
		793	ev_loop_fork (EV_P)
		794	{
		795	postfork = 1;
		796	}
		797
		798	#endif
		799
		800	#if EV_MULTIPLICITY
		801	struct ev_loop default_loop_struct;
		802	static struct ev_loop *default_loop;
		803
		804	struct ev_loop *
		805	#else
		806	static int default_loop;
		807
		808	int
		809	#endif
		810	ev_default_loop (int methods)
		811	{
		812	if (sigpipe [0] == sigpipe [1])
		813	if (pipe (sigpipe))
		814	return 0;
		815
		816	if (!default_loop)
		817	{
		818	#if EV_MULTIPLICITY
		819	struct ev_loop *loop = default_loop = &default_loop_struct;
		820	#else
		821	default_loop = 1;
		822	#endif
		823
		824	loop_init (EV_A_ methods);
		825
503	if (ev_method)	826	if (ev_method (EV_A))
504	{	827	{
505	ev_watcher_init (&sigev, sigcb);
506	siginit ();	828	siginit (EV_A);
507		829
		830	#ifndef WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	831	ev_signal_init (&childev, childcb, SIGCHLD);
		832	ev_set_priority (&childev, EV_MAXPRI);
509	ev_signal_start (&childev);	833	ev_signal_start (EV_A_ &childev);
		834	ev_unref (EV_A); /* child watcher should not keep loop alive */
		835	#endif
510	}	836	}
		837	else
		838	default_loop = 0;
511	}	839	}
512		840
513	return ev_method;	841	return default_loop;
		842	}
		843
		844	void
		845	ev_default_destroy (void)
		846	{
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *loop = default_loop;
		849	#endif
		850
		851	ev_ref (EV_A); /* child watcher */
		852	ev_signal_stop (EV_A_ &childev);
		853
		854	ev_ref (EV_A); /* signal watcher */
		855	ev_io_stop (EV_A_ &sigev);
		856
		857	close (sigpipe [0]); sigpipe [0] = 0;
		858	close (sigpipe [1]); sigpipe [1] = 0;
		859
		860	loop_destroy (EV_A);
		861	}
		862
		863	void
		864	ev_default_fork (void)
		865	{
		866	#if EV_MULTIPLICITY
		867	struct ev_loop *loop = default_loop;
		868	#endif
		869
		870	if (method)
		871	postfork = 1;
514	}	872	}
515		873
516	/*****************************************************************************/	874	/*****************************************************************************/
517		875
518	void
519	ev_fork_prepare (void)
520	{
521	/* nop */
522	}
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
537
538	ev_io_stop (&sigev);
539	close (sigpipe [0]);
540	close (sigpipe [1]);
541	pipe (sigpipe);
542	siginit ();
543	}
544
545	/*****************************************************************************/
546
547	static void	876	static void
548	call_pending (void)	877	call_pending (EV_P)
549	{	878	{
		879	int pri;
		880
		881	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	882	while (pendingcnt [pri])
551	{	883	{
552	ANPENDING *p = pendings + --pendingcnt;	884	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		885
554	if (p->w)	886	if (p->w)
555	{	887	{
556	p->w->pending = 0;	888	p->w->pending = 0;
557	p->w->cb (p->w, p->events);	889	p->w->cb (EV_A_ p->w, p->events);
558	}	890	}
559	}	891	}
560	}	892	}
561		893
562	static void	894	static void
563	timers_reify (void)	895	timers_reify (EV_P)
564	{	896	{
565	while (timercnt && timers [0]->at <= now)	897	while (timercnt && ((WT)timers [0])->at <= mn_now)
566	{	898	{
567	struct ev_timer *w = timers [0];	899	struct ev_timer *w = timers [0];
		900
		901	assert (("inactive timer on timer heap detected", ev_is_active (w)));
568		902
569	/* first reschedule or stop timer */	903	/* first reschedule or stop timer */
570	if (w->repeat)	904	if (w->repeat)
571	{	905	{
572	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	906	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
573	w->at = now + w->repeat;	907	((WT)w)->at = mn_now + w->repeat;
574	downheap ((WT *)timers, timercnt, 0);	908	downheap ((WT *)timers, timercnt, 0);
575	}	909	}
576	else	910	else
577	ev_timer_stop (w); /* nonrepeating: stop timer */	911	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
578		912
579	event ((W)w, EV_TIMEOUT);	913	event (EV_A_ (W)w, EV_TIMEOUT);
580	}	914	}
581	}	915	}
582		916
583	static void	917	static void
584	periodics_reify (void)	918	periodics_reify (EV_P)
585	{	919	{
586	while (periodiccnt && periodics [0]->at <= ev_now)	920	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
587	{	921	{
588	struct ev_periodic *w = periodics [0];	922	struct ev_periodic *w = periodics [0];
		923
		924	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
589		925
590	/* first reschedule or stop timer */	926	/* first reschedule or stop timer */
591	if (w->interval)	927	if (w->interval)
592	{	928	{
593	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	929	((WT)w)->at += floor ((rt_now - ((WT)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));	930	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
595	downheap ((WT *)periodics, periodiccnt, 0);	931	downheap ((WT *)periodics, periodiccnt, 0);
596	}	932	}
597	else	933	else
598	ev_periodic_stop (w); /* nonrepeating: stop timer */	934	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
599		935
600	event ((W)w, EV_PERIODIC);	936	event (EV_A_ (W)w, EV_PERIODIC);
601	}	937	}
602	}	938	}
603		939
604	static void	940	static void
605	periodics_reschedule (ev_tstamp diff)	941	periodics_reschedule (EV_P)
606	{	942	{
607	int i;	943	int i;
608		944
609	/* adjust periodics after time jump */	945	/* adjust periodics after time jump */
610	for (i = 0; i < periodiccnt; ++i)	946	for (i = 0; i < periodiccnt; ++i)
611	{	947	{
612	struct ev_periodic *w = periodics [i];	948	struct ev_periodic *w = periodics [i];
613		949
614	if (w->interval)	950	if (w->interval)
615	{	951	{
616	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	952	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
617		953
618	if (fabs (diff) >= 1e-4)	954	if (fabs (diff) >= 1e-4)
619	{	955	{
620	ev_periodic_stop (w);	956	ev_periodic_stop (EV_A_ w);
621	ev_periodic_start (w);	957	ev_periodic_start (EV_A_ w);
622		958
623	i = 0; /* restart loop, inefficient, but time jumps should be rare */	959	i = 0; /* restart loop, inefficient, but time jumps should be rare */
624	}	960	}
625	}	961	}
626	}	962	}
627	}	963	}
628		964
629	static int	965	inline int
630	time_update_monotonic (void)	966	time_update_monotonic (EV_P)
631	{	967	{
632	now = get_clock ();	968	mn_now = get_clock ();
633		969
634	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	970	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
635	{	971	{
636	ev_now = now + diff;	972	rt_now = rtmn_diff + mn_now;
637	return 0;	973	return 0;
638	}	974	}
639	else	975	else
640	{	976	{
641	now_floor = now;	977	now_floor = mn_now;
642	ev_now = ev_time ();	978	rt_now = ev_time ();
643	return 1;	979	return 1;
644	}	980	}
645	}	981	}
646		982
647	static void	983	static void
648	time_update (void)	984	time_update (EV_P)
649	{	985	{
650	int i;	986	int i;
651		987
652	#if EV_USE_MONOTONIC	988	#if EV_USE_MONOTONIC
653	if (expect_true (have_monotonic))	989	if (expect_true (have_monotonic))
654	{	990	{
655	if (time_update_monotonic ())	991	if (time_update_monotonic (EV_A))
656	{	992	{
657	ev_tstamp odiff = diff;	993	ev_tstamp odiff = rtmn_diff;
658		994
659	for (i = 4; --i; ) /* loop a few times, before making important decisions */	995	for (i = 4; --i; ) /* loop a few times, before making important decisions */
660	{	996	{
661	diff = ev_now - now;	997	rtmn_diff = rt_now - mn_now;
662		998
663	if (fabs (odiff - diff) < MIN_TIMEJUMP)	999	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
664	return; /* all is well */	1000	return; /* all is well */
665		1001
666	ev_now = ev_time ();	1002	rt_now = ev_time ();
667	now = get_clock ();	1003	mn_now = get_clock ();
668	now_floor = now;	1004	now_floor = mn_now;
669	}	1005	}
670		1006
671	periodics_reschedule (diff - odiff);	1007	periodics_reschedule (EV_A);
672	/* no timer adjustment, as the monotonic clock doesn't jump */	1008	/* no timer adjustment, as the monotonic clock doesn't jump */
		1009	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
673	}	1010	}
674	}	1011	}
675	else	1012	else
676	#endif	1013	#endif
677	{	1014	{
678	ev_now = ev_time ();	1015	rt_now = ev_time ();
679		1016
680	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1017	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
681	{	1018	{
682	periodics_reschedule (ev_now - now);	1019	periodics_reschedule (EV_A);
683		1020
684	/* adjust timers. this is easy, as the offset is the same for all */	1021	/* adjust timers. this is easy, as the offset is the same for all */
685	for (i = 0; i < timercnt; ++i)	1022	for (i = 0; i < timercnt; ++i)
686	timers [i]->at += diff;	1023	((WT)timers [i])->at += rt_now - mn_now;
687	}	1024	}
688		1025
689	now = ev_now;	1026	mn_now = rt_now;
690	}	1027	}
691	}	1028	}
692		1029
693	int ev_loop_done;	1030	void
		1031	ev_ref (EV_P)
		1032	{
		1033	++activecnt;
		1034	}
694		1035
		1036	void
		1037	ev_unref (EV_P)
		1038	{
		1039	--activecnt;
		1040	}
		1041
		1042	static int loop_done;
		1043
		1044	void
695	void ev_loop (int flags)	1045	ev_loop (EV_P_ int flags)
696	{	1046	{
697	double block;	1047	double block;
698	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1048	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
699		1049
700	do	1050	do
701	{	1051	{
702	/* queue check watchers (and execute them) */	1052	/* queue check watchers (and execute them) */
703	if (expect_false (preparecnt))	1053	if (expect_false (preparecnt))
704	{	1054	{
705	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1055	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
706	call_pending ();	1056	call_pending (EV_A);
707	}	1057	}
708		1058
		1059	/* we might have forked, so reify kernel state if necessary */
		1060	if (expect_false (postfork))
		1061	loop_fork (EV_A);
		1062
709	/* update fd-related kernel structures */	1063	/* update fd-related kernel structures */
710	fd_reify ();	1064	fd_reify (EV_A);
711		1065
712	/* calculate blocking time */	1066	/* calculate blocking time */
713		1067
714	/* we only need this for !monotonic clockor timers, but as we basically	1068	/* we only need this for !monotonic clockor timers, but as we basically
715	always have timers, we just calculate it always */	1069	always have timers, we just calculate it always */
716	#if EV_USE_MONOTONIC	1070	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	1071	if (expect_true (have_monotonic))
718	time_update_monotonic ();	1072	time_update_monotonic (EV_A);
719	else	1073	else
720	#endif	1074	#endif
721	{	1075	{
722	ev_now = ev_time ();	1076	rt_now = ev_time ();
723	now = ev_now;	1077	mn_now = rt_now;
724	}	1078	}
725		1079
726	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1080	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
727	block = 0.;	1081	block = 0.;
728	else	1082	else
729	{	1083	{
730	block = MAX_BLOCKTIME;	1084	block = MAX_BLOCKTIME;
731		1085
732	if (timercnt)	1086	if (timercnt)
733	{	1087	{
734	ev_tstamp to = timers [0]->at - now + method_fudge;	1088	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
735	if (block > to) block = to;	1089	if (block > to) block = to;
736	}	1090	}
737		1091
738	if (periodiccnt)	1092	if (periodiccnt)
739	{	1093	{
740	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1094	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
741	if (block > to) block = to;	1095	if (block > to) block = to;
742	}	1096	}
743		1097
744	if (block < 0.) block = 0.;	1098	if (block < 0.) block = 0.;
745	}	1099	}
746		1100
747	method_poll (block);	1101	method_poll (EV_A_ block);
748		1102
749	/* update ev_now, do magic */	1103	/* update rt_now, do magic */
750	time_update ();	1104	time_update (EV_A);
751		1105
752	/* queue pending timers and reschedule them */	1106	/* queue pending timers and reschedule them */
753	timers_reify (); /* relative timers called last */	1107	timers_reify (EV_A); /* relative timers called last */
754	periodics_reify (); /* absolute timers called first */	1108	periodics_reify (EV_A); /* absolute timers called first */
755		1109
756	/* queue idle watchers unless io or timers are pending */	1110	/* queue idle watchers unless io or timers are pending */
757	if (!pendingcnt)	1111	if (!pendingcnt)
758	queue_events ((W *)idles, idlecnt, EV_IDLE);	1112	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
759		1113
760	/* queue check watchers, to be executed first */	1114	/* queue check watchers, to be executed first */
761	if (checkcnt)	1115	if (checkcnt)
762	queue_events ((W *)checks, checkcnt, EV_CHECK);	1116	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
763		1117
764	call_pending ();	1118	call_pending (EV_A);
765	}	1119	}
766	while (!ev_loop_done);	1120	while (activecnt && !loop_done);
767		1121
768	if (ev_loop_done != 2)	1122	if (loop_done != 2)
769	ev_loop_done = 0;	1123	loop_done = 0;
		1124	}
		1125
		1126	void
		1127	ev_unloop (EV_P_ int how)
		1128	{
		1129	loop_done = how;
770	}	1130	}
771		1131
772	/*****************************************************************************/	1132	/*****************************************************************************/
773		1133
774	static void	1134	inline void
775	wlist_add (WL *head, WL elem)	1135	wlist_add (WL *head, WL elem)
776	{	1136	{
777	elem->next = *head;	1137	elem->next = *head;
778	*head = elem;	1138	*head = elem;
779	}	1139	}
780		1140
781	static void	1141	inline void
782	wlist_del (WL *head, WL elem)	1142	wlist_del (WL *head, WL elem)
783	{	1143	{
784	while (*head)	1144	while (*head)
785	{	1145	{
786	if (*head == elem)	1146	if (*head == elem)
…		…
791		1151
792	head = &(*head)->next;	1152	head = &(*head)->next;
793	}	1153	}
794	}	1154	}
795		1155
796	static void	1156	inline void
797	ev_clear_pending (W w)	1157	ev_clear_pending (EV_P_ W w)
798	{	1158	{
799	if (w->pending)	1159	if (w->pending)
800	{	1160	{
801	pendings [w->pending - 1].w = 0;	1161	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	1162	w->pending = 0;
803	}	1163	}
804	}	1164	}
805		1165
806	static void	1166	inline void
807	ev_start (W w, int active)	1167	ev_start (EV_P_ W w, int active)
808	{	1168	{
		1169	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1170	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1171
809	w->active = active;	1172	w->active = active;
		1173	ev_ref (EV_A);
810	}	1174	}
811		1175
812	static void	1176	inline void
813	ev_stop (W w)	1177	ev_stop (EV_P_ W w)
814	{	1178	{
		1179	ev_unref (EV_A);
815	w->active = 0;	1180	w->active = 0;
816	}	1181	}
817		1182
818	/*****************************************************************************/	1183	/*****************************************************************************/
819		1184
820	void	1185	void
821	ev_io_start (struct ev_io *w)	1186	ev_io_start (EV_P_ struct ev_io *w)
822	{	1187	{
823	int fd = w->fd;	1188	int fd = w->fd;
824		1189
825	if (ev_is_active (w))	1190	if (ev_is_active (w))
826	return;	1191	return;
827		1192
828	assert (("ev_io_start called with negative fd", fd >= 0));	1193	assert (("ev_io_start called with negative fd", fd >= 0));
829		1194
830	ev_start ((W)w, 1);	1195	ev_start (EV_A_ (W)w, 1);
831	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1196	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
832	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1197	wlist_add ((WL *)&anfds[fd].head, (WL)w);
833		1198
834	fd_change (fd);	1199	fd_change (EV_A_ fd);
835	}	1200	}
836		1201
837	void	1202	void
838	ev_io_stop (struct ev_io *w)	1203	ev_io_stop (EV_P_ struct ev_io *w)
839	{	1204	{
840	ev_clear_pending ((W)w);	1205	ev_clear_pending (EV_A_ (W)w);
841	if (!ev_is_active (w))	1206	if (!ev_is_active (w))
842	return;	1207	return;
843		1208
844	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1209	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
845	ev_stop ((W)w);	1210	ev_stop (EV_A_ (W)w);
846		1211
847	fd_change (w->fd);	1212	fd_change (EV_A_ w->fd);
848	}	1213	}
849		1214
850	void	1215	void
851	ev_timer_start (struct ev_timer *w)	1216	ev_timer_start (EV_P_ struct ev_timer *w)
852	{	1217	{
853	if (ev_is_active (w))	1218	if (ev_is_active (w))
854	return;	1219	return;
855		1220
856	w->at += now;	1221	((WT)w)->at += mn_now;
857		1222
858	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1223	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859		1224
860	ev_start ((W)w, ++timercnt);	1225	ev_start (EV_A_ (W)w, ++timercnt);
861	array_needsize (timers, timermax, timercnt, );	1226	array_needsize (timers, timermax, timercnt, );
862	timers [timercnt - 1] = w;	1227	timers [timercnt - 1] = w;
863	upheap ((WT *)timers, timercnt - 1);	1228	upheap ((WT *)timers, timercnt - 1);
864	}
865		1229
		1230	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1231	}
		1232
866	void	1233	void
867	ev_timer_stop (struct ev_timer *w)	1234	ev_timer_stop (EV_P_ struct ev_timer *w)
868	{	1235	{
869	ev_clear_pending ((W)w);	1236	ev_clear_pending (EV_A_ (W)w);
870	if (!ev_is_active (w))	1237	if (!ev_is_active (w))
871	return;	1238	return;
872		1239
		1240	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1241
873	if (w->active < timercnt--)	1242	if (((W)w)->active < timercnt--)
874	{	1243	{
875	timers [w->active - 1] = timers [timercnt];	1244	timers [((W)w)->active - 1] = timers [timercnt];
876	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
877	}	1246	}
878		1247
879	w->at = w->repeat;	1248	((WT)w)->at = w->repeat;
880		1249
881	ev_stop ((W)w);	1250	ev_stop (EV_A_ (W)w);
882	}	1251	}
883		1252
884	void	1253	void
885	ev_timer_again (struct ev_timer *w)	1254	ev_timer_again (EV_P_ struct ev_timer *w)
886	{	1255	{
887	if (ev_is_active (w))	1256	if (ev_is_active (w))
888	{	1257	{
889	if (w->repeat)	1258	if (w->repeat)
890	{	1259	{
891	w->at = now + w->repeat;	1260	((WT)w)->at = mn_now + w->repeat;
892	downheap ((WT *)timers, timercnt, w->active - 1);	1261	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
893	}	1262	}
894	else	1263	else
895	ev_timer_stop (w);	1264	ev_timer_stop (EV_A_ w);
896	}	1265	}
897	else if (w->repeat)	1266	else if (w->repeat)
898	ev_timer_start (w);	1267	ev_timer_start (EV_A_ w);
899	}	1268	}
900		1269
901	void	1270	void
902	ev_periodic_start (struct ev_periodic *w)	1271	ev_periodic_start (EV_P_ struct ev_periodic *w)
903	{	1272	{
904	if (ev_is_active (w))	1273	if (ev_is_active (w))
905	return;	1274	return;
906		1275
907	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1276	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908		1277
909	/* this formula differs from the one in periodic_reify because we do not always round up */	1278	/* this formula differs from the one in periodic_reify because we do not always round up */
910	if (w->interval)	1279	if (w->interval)
911	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1280	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
912		1281
913	ev_start ((W)w, ++periodiccnt);	1282	ev_start (EV_A_ (W)w, ++periodiccnt);
914	array_needsize (periodics, periodicmax, periodiccnt, );	1283	array_needsize (periodics, periodicmax, periodiccnt, );
915	periodics [periodiccnt - 1] = w;	1284	periodics [periodiccnt - 1] = w;
916	upheap ((WT *)periodics, periodiccnt - 1);	1285	upheap ((WT *)periodics, periodiccnt - 1);
917	}
918		1286
		1287	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1288	}
		1289
919	void	1290	void
920	ev_periodic_stop (struct ev_periodic *w)	1291	ev_periodic_stop (EV_P_ struct ev_periodic *w)
921	{	1292	{
922	ev_clear_pending ((W)w);	1293	ev_clear_pending (EV_A_ (W)w);
923	if (!ev_is_active (w))	1294	if (!ev_is_active (w))
924	return;	1295	return;
925		1296
		1297	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1298
926	if (w->active < periodiccnt--)	1299	if (((W)w)->active < periodiccnt--)
927	{	1300	{
928	periodics [w->active - 1] = periodics [periodiccnt];	1301	periodics [((W)w)->active - 1] = periodics [periodiccnt];
929	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1302	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
930	}	1303	}
931		1304
932	ev_stop ((W)w);	1305	ev_stop (EV_A_ (W)w);
933	}	1306	}
934		1307
935	void	1308	void
936	ev_signal_start (struct ev_signal *w)	1309	ev_idle_start (EV_P_ struct ev_idle *w)
937	{	1310	{
938	if (ev_is_active (w))	1311	if (ev_is_active (w))
939	return;	1312	return;
940		1313
		1314	ev_start (EV_A_ (W)w, ++idlecnt);
		1315	array_needsize (idles, idlemax, idlecnt, );
		1316	idles [idlecnt - 1] = w;
		1317	}
		1318
		1319	void
		1320	ev_idle_stop (EV_P_ struct ev_idle *w)
		1321	{
		1322	ev_clear_pending (EV_A_ (W)w);
		1323	if (ev_is_active (w))
		1324	return;
		1325
		1326	idles [((W)w)->active - 1] = idles [--idlecnt];
		1327	ev_stop (EV_A_ (W)w);
		1328	}
		1329
		1330	void
		1331	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1332	{
		1333	if (ev_is_active (w))
		1334	return;
		1335
		1336	ev_start (EV_A_ (W)w, ++preparecnt);
		1337	array_needsize (prepares, preparemax, preparecnt, );
		1338	prepares [preparecnt - 1] = w;
		1339	}
		1340
		1341	void
		1342	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1343	{
		1344	ev_clear_pending (EV_A_ (W)w);
		1345	if (ev_is_active (w))
		1346	return;
		1347
		1348	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1349	ev_stop (EV_A_ (W)w);
		1350	}
		1351
		1352	void
		1353	ev_check_start (EV_P_ struct ev_check *w)
		1354	{
		1355	if (ev_is_active (w))
		1356	return;
		1357
		1358	ev_start (EV_A_ (W)w, ++checkcnt);
		1359	array_needsize (checks, checkmax, checkcnt, );
		1360	checks [checkcnt - 1] = w;
		1361	}
		1362
		1363	void
		1364	ev_check_stop (EV_P_ struct ev_check *w)
		1365	{
		1366	ev_clear_pending (EV_A_ (W)w);
		1367	if (ev_is_active (w))
		1368	return;
		1369
		1370	checks [((W)w)->active - 1] = checks [--checkcnt];
		1371	ev_stop (EV_A_ (W)w);
		1372	}
		1373
		1374	#ifndef SA_RESTART
		1375	# define SA_RESTART 0
		1376	#endif
		1377
		1378	void
		1379	ev_signal_start (EV_P_ struct ev_signal *w)
		1380	{
		1381	#if EV_MULTIPLICITY
		1382	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1383	#endif
		1384	if (ev_is_active (w))
		1385	return;
		1386
941	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1387	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942		1388
943	ev_start ((W)w, 1);	1389	ev_start (EV_A_ (W)w, 1);
944	array_needsize (signals, signalmax, w->signum, signals_init);	1390	array_needsize (signals, signalmax, w->signum, signals_init);
945	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1391	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
946		1392
947	if (!w->next)	1393	if (!((WL)w)->next)
948	{	1394	{
		1395	#if WIN32
		1396	signal (w->signum, sighandler);
		1397	#else
949	struct sigaction sa;	1398	struct sigaction sa;
950	sa.sa_handler = sighandler;	1399	sa.sa_handler = sighandler;
951	sigfillset (&sa.sa_mask);	1400	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	1401	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	1402	sigaction (w->signum, &sa, 0);
		1403	#endif
954	}	1404	}
955	}	1405	}
956		1406
957	void	1407	void
958	ev_signal_stop (struct ev_signal *w)	1408	ev_signal_stop (EV_P_ struct ev_signal *w)
959	{	1409	{
960	ev_clear_pending ((W)w);	1410	ev_clear_pending (EV_A_ (W)w);
961	if (!ev_is_active (w))	1411	if (!ev_is_active (w))
962	return;	1412	return;
963		1413
964	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1414	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
965	ev_stop ((W)w);	1415	ev_stop (EV_A_ (W)w);
966		1416
967	if (!signals [w->signum - 1].head)	1417	if (!signals [w->signum - 1].head)
968	signal (w->signum, SIG_DFL);	1418	signal (w->signum, SIG_DFL);
969	}	1419	}
970		1420
971	void	1421	void
972	ev_idle_start (struct ev_idle *w)	1422	ev_child_start (EV_P_ struct ev_child *w)
973	{	1423	{
		1424	#if EV_MULTIPLICITY
		1425	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1426	#endif
974	if (ev_is_active (w))	1427	if (ev_is_active (w))
975	return;	1428	return;
976		1429
977	ev_start ((W)w, ++idlecnt);	1430	ev_start (EV_A_ (W)w, 1);
978	array_needsize (idles, idlemax, idlecnt, );	1431	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
979	idles [idlecnt - 1] = w;
980	}	1432	}
981		1433
982	void	1434	void
983	ev_idle_stop (struct ev_idle *w)	1435	ev_child_stop (EV_P_ struct ev_child *w)
984	{	1436	{
985	ev_clear_pending ((W)w);	1437	ev_clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	1438	if (ev_is_active (w))
987	return;	1439	return;
988		1440
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);	1441	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1055	ev_stop ((W)w);	1442	ev_stop (EV_A_ (W)w);
1056	}	1443	}
1057		1444
1058	/*****************************************************************************/	1445	/*****************************************************************************/
1059		1446
1060	struct ev_once	1447	struct ev_once
…		…
1064	void (cb)(int revents, void arg);	1451	void (cb)(int revents, void arg);
1065	void *arg;	1452	void *arg;
1066	};	1453	};
1067		1454
1068	static void	1455	static void
1069	once_cb (struct ev_once *once, int revents)	1456	once_cb (EV_P_ struct ev_once *once, int revents)
1070	{	1457	{
1071	void (cb)(int revents, void arg) = once->cb;	1458	void (cb)(int revents, void arg) = once->cb;
1072	void *arg = once->arg;	1459	void *arg = once->arg;
1073		1460
1074	ev_io_stop (&once->io);	1461	ev_io_stop (EV_A_ &once->io);
1075	ev_timer_stop (&once->to);	1462	ev_timer_stop (EV_A_ &once->to);
1076	free (once);	1463	ev_free (once);
1077		1464
1078	cb (revents, arg);	1465	cb (revents, arg);
1079	}	1466	}
1080		1467
1081	static void	1468	static void
1082	once_cb_io (struct ev_io *w, int revents)	1469	once_cb_io (EV_P_ struct ev_io *w, int revents)
1083	{	1470	{
1084	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1471	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1085	}	1472	}
1086		1473
1087	static void	1474	static void
1088	once_cb_to (struct ev_timer *w, int revents)	1475	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1089	{	1476	{
1090	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1477	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1091	}	1478	}
1092		1479
1093	void	1480	void
1094	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1481	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1095	{	1482	{
1096	struct ev_once *once = malloc (sizeof (struct ev_once));	1483	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1097		1484
1098	if (!once)	1485	if (!once)
1099	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1486	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1100	else	1487	else
1101	{	1488	{
…		…
1104		1491
1105	ev_watcher_init (&once->io, once_cb_io);	1492	ev_watcher_init (&once->io, once_cb_io);
1106	if (fd >= 0)	1493	if (fd >= 0)
1107	{	1494	{
1108	ev_io_set (&once->io, fd, events);	1495	ev_io_set (&once->io, fd, events);
1109	ev_io_start (&once->io);	1496	ev_io_start (EV_A_ &once->io);
1110	}	1497	}
1111		1498
1112	ev_watcher_init (&once->to, once_cb_to);	1499	ev_watcher_init (&once->to, once_cb_to);
1113	if (timeout >= 0.)	1500	if (timeout >= 0.)
1114	{	1501	{
1115	ev_timer_set (&once->to, timeout, 0.);	1502	ev_timer_set (&once->to, timeout, 0.);
1116	ev_timer_start (&once->to);	1503	ev_timer_start (EV_A_ &once->to);
1117	}	1504	}
1118	}	1505	}
1119	}	1506	}
1120		1507
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
1203

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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 1.70 by root, Tue Nov 6 00:52:32 2007 UTC

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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 1.70 by root, Tue Nov 6 00:52:32 2007 UTC