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Comparing libev/ev.c (file contents):
Revision 1.44 by root, Fri Nov 2 20:59:14 2007 UTC vs.
Revision 1.75 by root, Tue Nov 6 19:29:20 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>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	67	#include <time.h>
50		68
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
51	/**/	76	/**/
52		77
53	#ifndef EV_USE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
55	#endif	80	#endif
…		…
66	# define EV_USE_EPOLL 0	91	# define EV_USE_EPOLL 0
67	#endif	92	#endif
68		93
69	#ifndef EV_USE_KQUEUE	94	#ifndef EV_USE_KQUEUE
70	# define EV_USE_KQUEUE 0	95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
		105	# endif
71	#endif	106	#endif
72		107
73	#ifndef EV_USE_REALTIME	108	#ifndef EV_USE_REALTIME
74	# define EV_USE_REALTIME 1	109	# define EV_USE_REALTIME 1
75	#endif	110	#endif
…		…
111		146
112	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
113	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
114	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
115		150
116	static ev_tstamp now_floor, now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
117	ev_tstamp ev_now;
118	int ev_method;
119		152
120	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
121
122	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
123	static void (*method_modify)(int fd, int oev, int nev);
124	static void (*method_poll)(ev_tstamp timeout);
125		154
126	/*****************************************************************************/	155	/*****************************************************************************/
127		156
128	ev_tstamp	157	static void (*syserr_cb)(const char *msg);
		158
		159	void ev_set_syserr_cb (void (*cb)(const char *msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void *(*alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
		224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
129	ev_time (void)	239	ev_time (void)
130	{	240	{
131	#if EV_USE_REALTIME	241	#if EV_USE_REALTIME
132	struct timespec ts;	242	struct timespec ts;
133	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
…		…
137	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
138	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
139	#endif	249	#endif
140	}	250	}
141		251
142	static ev_tstamp	252	inline ev_tstamp
143	get_clock (void)	253	get_clock (void)
144	{	254	{
145	#if EV_USE_MONOTONIC	255	#if EV_USE_MONOTONIC
146	if (expect_true (have_monotonic))	256	if (expect_true (have_monotonic))
147	{	257	{
…		…
152	#endif	262	#endif
153		263
154	return ev_time ();	264	return ev_time ();
155	}	265	}
156		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
157	#define array_roundsize(base,n) ((n) | 4 & ~3)	273	#define array_roundsize(type,n) ((n) | 4 & ~3)
158		274
159	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
160	if (expect_false ((cnt) > cur)) \	276	if (expect_false ((cnt) > cur)) \
161	{ \	277	{ \
162	int newcnt = cur; \	278	int newcnt = cur; \
163	do \	279	do \
164	{ \	280	{ \
165	newcnt = array_roundsize (base, newcnt << 1); \	281	newcnt = array_roundsize (type, newcnt << 1); \
166	} \	282	} \
167	while ((cnt) > newcnt); \	283	while ((cnt) > newcnt); \
168	\	284	\
169	base = realloc (base, sizeof (*base) * (newcnt)); \	285	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
170	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
171	cur = newcnt; \	287	cur = newcnt; \
172	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
173		305
174	/*****************************************************************************/	306	/*****************************************************************************/
175
176	typedef struct
177	{
178	struct ev_io *head;
179	unsigned char events;
180	unsigned char reify;
181	} ANFD;
182
183	static ANFD *anfds;
184	static int anfdmax;
185		307
186	static void	308	static void
187	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
188	{	310	{
189	while (count--)	311	while (count--)
…		…
194		316
195	++base;	317	++base;
196	}	318	}
197	}	319	}
198		320
199	typedef struct
200	{
201	W w;
202	int events;
203	} ANPENDING;
204
205	static ANPENDING *pendings [NUMPRI];
206	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
207
208	static void	321	static void
209	event (W w, int events)	322	event (EV_P_ W w, int events)
210	{	323	{
211	if (w->pending)	324	if (w->pending)
212	{	325	{
213	pendings [ABSPRI (w)][w->pending - 1].events |= events;	326	pendings [ABSPRI (w)][w->pending - 1].events |= events;
214	return;	327	return;
215	}	328	}
216		329
217	w->pending = ++pendingcnt [ABSPRI (w)];	330	w->pending = ++pendingcnt [ABSPRI (w)];
218	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );	331	array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
219	pendings [ABSPRI (w)][w->pending - 1].w = w;	332	pendings [ABSPRI (w)][w->pending - 1].w = w;
220	pendings [ABSPRI (w)][w->pending - 1].events = events;	333	pendings [ABSPRI (w)][w->pending - 1].events = events;
221	}	334	}
222		335
223	static void	336	static void
224	queue_events (W *events, int eventcnt, int type)	337	queue_events (EV_P_ W *events, int eventcnt, int type)
225	{	338	{
226	int i;	339	int i;
227		340
228	for (i = 0; i < eventcnt; ++i)	341	for (i = 0; i < eventcnt; ++i)
229	event (events [i], type);	342	event (EV_A_ events [i], type);
230	}	343	}
231		344
232	static void	345	static void
233	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
234	{	347	{
235	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
236	struct ev_io *w;	349	struct ev_io *w;
237		350
238	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
239	{	352	{
240	int ev = w->events & events;	353	int ev = w->events & events;
241		354
242	if (ev)	355	if (ev)
243	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
244	}	357	}
245	}	358	}
246		359
247	/*****************************************************************************/	360	/*****************************************************************************/
248		361
249	static int *fdchanges;
250	static int fdchangemax, fdchangecnt;
251
252	static void	362	static void
253	fd_reify (void)	363	fd_reify (EV_P)
254	{	364	{
255	int i;	365	int i;
256		366
257	for (i = 0; i < fdchangecnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
258	{	368	{
…		…
260	ANFD *anfd = anfds + fd;	370	ANFD *anfd = anfds + fd;
261	struct ev_io *w;	371	struct ev_io *w;
262		372
263	int events = 0;	373	int events = 0;
264		374
265	for (w = anfd->head; w; w = w->next)	375	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
266	events |= w->events;	376	events |= w->events;
267		377
268	anfd->reify = 0;	378	anfd->reify = 0;
269		379
270	if (anfd->events != events)
271	{
272	method_modify (fd, anfd->events, events);	380	method_modify (EV_A_ fd, anfd->events, events);
273	anfd->events = events;	381	anfd->events = events;
274	}
275	}	382	}
276		383
277	fdchangecnt = 0;	384	fdchangecnt = 0;
278	}	385	}
279		386
280	static void	387	static void
281	fd_change (int fd)	388	fd_change (EV_P_ int fd)
282	{	389	{
283	if (anfds [fd].reify || fdchangecnt < 0)	390	if (anfds [fd].reify)
284	return;	391	return;
285		392
286	anfds [fd].reify = 1;	393	anfds [fd].reify = 1;
287		394
288	++fdchangecnt;	395	++fdchangecnt;
289	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	396	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
290	fdchanges [fdchangecnt - 1] = fd;	397	fdchanges [fdchangecnt - 1] = fd;
291	}	398	}
292		399
293	static void	400	static void
294	fd_kill (int fd)	401	fd_kill (EV_P_ int fd)
295	{	402	{
296	struct ev_io *w;	403	struct ev_io *w;
297		404
298	printf ("killing fd %d\n", fd);//D
299	while ((w = anfds [fd].head))	405	while ((w = (struct ev_io *)anfds [fd].head))
300	{	406	{
301	ev_io_stop (w);	407	ev_io_stop (EV_A_ w);
302	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	408	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
303	}	409	}
		410	}
		411
		412	static int
		413	fd_valid (int fd)
		414	{
		415	#ifdef WIN32
		416	return !!win32_get_osfhandle (fd);
		417	#else
		418	return fcntl (fd, F_GETFD) != -1;
		419	#endif
304	}	420	}
305		421
306	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
307	static void	423	static void
308	fd_ebadf (void)	424	fd_ebadf (EV_P)
309	{	425	{
310	int fd;	426	int fd;
311		427
312	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
313	if (anfds [fd].events)	429	if (anfds [fd].events)
314	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
315	fd_kill (fd);	431	fd_kill (EV_A_ fd);
316	}	432	}
317		433
318	/* called on ENOMEM in select/poll to kill some fds and retry */	434	/* called on ENOMEM in select/poll to kill some fds and retry */
319	static void	435	static void
320	fd_enomem (void)	436	fd_enomem (EV_P)
321	{	437	{
322	int fd = anfdmax;	438	int fd;
323		439
324	while (fd--)	440	for (fd = anfdmax; fd--; )
325	if (anfds [fd].events)	441	if (anfds [fd].events)
326	{	442	{
327	close (fd);
328	fd_kill (fd);	443	fd_kill (EV_A_ fd);
329	return;	444	return;
330	}	445	}
331	}	446	}
332		447
		448	/* usually called after fork if method needs to re-arm all fds from scratch */
		449	static void
		450	fd_rearm_all (EV_P)
		451	{
		452	int fd;
		453
		454	/* this should be highly optimised to not do anything but set a flag */
		455	for (fd = 0; fd < anfdmax; ++fd)
		456	if (anfds [fd].events)
		457	{
		458	anfds [fd].events = 0;
		459	fd_change (EV_A_ fd);
		460	}
		461	}
		462
333	/*****************************************************************************/	463	/*****************************************************************************/
334		464
335	static struct ev_timer **timers;
336	static int timermax, timercnt;
337
338	static struct ev_periodic **periodics;
339	static int periodicmax, periodiccnt;
340
341	static void	465	static void
342	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
343	{	467	{
344	WT w = timers [k];	468	WT w = heap [k];
345		469
346	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
347	{	471	{
348	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
349	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
350	k >>= 1;	474	k >>= 1;
351	}	475	}
352		476
353	timers [k] = w;	477	heap [k] = w;
354	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
355		479
356	}	480	}
357		481
358	static void	482	static void
359	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
360	{	484	{
361	WT w = timers [k];	485	WT w = heap [k];
362		486
363	while (k < (N >> 1))	487	while (k < (N >> 1))
364	{	488	{
365	int j = k << 1;	489	int j = k << 1;
366		490
367	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
368	++j;	492	++j;
369		493
370	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
371	break;	495	break;
372		496
373	timers [k] = timers [j];	497	heap [k] = heap [j];
374	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
375	k = j;	499	k = j;
376	}	500	}
377		501
378	timers [k] = w;	502	heap [k] = w;
379	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
380	}	504	}
381		505
382	/*****************************************************************************/	506	/*****************************************************************************/
383		507
384	typedef struct	508	typedef struct
385	{	509	{
386	struct ev_signal *head;	510	WL head;
387	sig_atomic_t volatile gotsig;	511	sig_atomic_t volatile gotsig;
388	} ANSIG;	512	} ANSIG;
389		513
390	static ANSIG *signals;	514	static ANSIG *signals;
391	static int signalmax;	515	static int signalmax;
…		…
407	}	531	}
408		532
409	static void	533	static void
410	sighandler (int signum)	534	sighandler (int signum)
411	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
412	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
413		541
414	if (!gotsig)	542	if (!gotsig)
415	{	543	{
		544	int old_errno = errno;
416	gotsig = 1;	545	gotsig = 1;
		546	#ifdef WIN32
		547	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		548	#else
417	write (sigpipe [1], &signum, 1);	549	write (sigpipe [1], &signum, 1);
		550	#endif
		551	errno = old_errno;
418	}	552	}
419	}	553	}
420		554
421	static void	555	static void
422	sigcb (struct ev_io *iow, int revents)	556	sigcb (EV_P_ struct ev_io *iow, int revents)
423	{	557	{
424	struct ev_signal *w;	558	WL w;
425	int signum;	559	int signum;
426		560
		561	#ifdef WIN32
		562	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		563	#else
427	read (sigpipe [0], &revents, 1);	564	read (sigpipe [0], &revents, 1);
		565	#endif
428	gotsig = 0;	566	gotsig = 0;
429		567
430	for (signum = signalmax; signum--; )	568	for (signum = signalmax; signum--; )
431	if (signals [signum].gotsig)	569	if (signals [signum].gotsig)
432	{	570	{
433	signals [signum].gotsig = 0;	571	signals [signum].gotsig = 0;
434		572
435	for (w = signals [signum].head; w; w = w->next)	573	for (w = signals [signum].head; w; w = w->next)
436	event ((W)w, EV_SIGNAL);	574	event (EV_A_ (W)w, EV_SIGNAL);
437	}	575	}
438	}	576	}
439		577
440	static void	578	static void
441	siginit (void)	579	siginit (EV_P)
442	{	580	{
		581	#ifndef WIN32
443	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	582	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
444	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	583	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
445		584
446	/* rather than sort out wether we really need nb, set it */	585	/* rather than sort out wether we really need nb, set it */
447	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	586	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
448	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	587	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		588	#endif
449		589
450	ev_io_set (&sigev, sigpipe [0], EV_READ);	590	ev_io_set (&sigev, sigpipe [0], EV_READ);
451	ev_io_start (&sigev);	591	ev_io_start (EV_A_ &sigev);
		592	ev_unref (EV_A); /* child watcher should not keep loop alive */
452	}	593	}
453		594
454	/*****************************************************************************/	595	/*****************************************************************************/
455		596
456	static struct ev_idle **idles;
457	static int idlemax, idlecnt;
458
459	static struct ev_prepare **prepares;
460	static int preparemax, preparecnt;
461
462	static struct ev_check **checks;
463	static int checkmax, checkcnt;
464
465	/*****************************************************************************/
466
467	static struct ev_child *childs [PID_HASHSIZE];	597	static struct ev_child *childs [PID_HASHSIZE];
		598
		599	#ifndef WIN32
		600
468	static struct ev_signal childev;	601	static struct ev_signal childev;
469		602
470	#ifndef WCONTINUED	603	#ifndef WCONTINUED
471	# define WCONTINUED 0	604	# define WCONTINUED 0
472	#endif	605	#endif
473		606
474	static void	607	static void
475	childcb (struct ev_signal *sw, int revents)	608	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
476	{	609	{
477	struct ev_child *w;	610	struct ev_child *w;
		611
		612	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		613	if (w->pid == pid || !w->pid)
		614	{
		615	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		616	w->rpid = pid;
		617	w->rstatus = status;
		618	event (EV_A_ (W)w, EV_CHILD);
		619	}
		620	}
		621
		622	static void
		623	childcb (EV_P_ struct ev_signal *sw, int revents)
		624	{
478	int pid, status;	625	int pid, status;
479		626
480	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	627	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
481	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	628	{
482	if (w->pid == pid || !w->pid)	629	/* make sure we are called again until all childs have been reaped */
483	{	630	event (EV_A_ (W)sw, EV_SIGNAL);
484	w->status = status;	631
485	event ((W)w, EV_CHILD);	632	child_reap (EV_A_ sw, pid, pid, status);
486	}	633	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		634	}
487	}	635	}
		636
		637	#endif
488		638
489	/*****************************************************************************/	639	/*****************************************************************************/
490		640
491	#if EV_USE_KQUEUE	641	#if EV_USE_KQUEUE
492	# include "ev_kqueue.c"	642	# include "ev_kqueue.c"
…		…
511	ev_version_minor (void)	661	ev_version_minor (void)
512	{	662	{
513	return EV_VERSION_MINOR;	663	return EV_VERSION_MINOR;
514	}	664	}
515		665
516	/* return true if we are running with elevated privileges and ignore env variables */	666	/* return true if we are running with elevated privileges and should ignore env variables */
517	static int	667	static int
518	enable_secure ()	668	enable_secure (void)
519	{	669	{
		670	#ifdef WIN32
		671	return 0;
		672	#else
520	return getuid () != geteuid ()	673	return getuid () != geteuid ()
521	|| getgid () != getegid ();	674	|| getgid () != getegid ();
		675	#endif
522	}	676	}
523		677
524	int ev_init (int methods)	678	int
		679	ev_method (EV_P)
525	{	680	{
		681	return method;
		682	}
		683
		684	static void
		685	loop_init (EV_P_ int methods)
		686	{
526	if (!ev_method)	687	if (!method)
527	{	688	{
528	#if EV_USE_MONOTONIC	689	#if EV_USE_MONOTONIC
529	{	690	{
530	struct timespec ts;	691	struct timespec ts;
531	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	692	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
532	have_monotonic = 1;	693	have_monotonic = 1;
533	}	694	}
534	#endif	695	#endif
535		696
536	ev_now = ev_time ();	697	rt_now = ev_time ();
537	now = get_clock ();	698	mn_now = get_clock ();
538	now_floor = now;	699	now_floor = mn_now;
539	diff = ev_now - now;	700	rtmn_diff = rt_now - mn_now;
540
541	if (pipe (sigpipe))
542	return 0;
543		701
544	if (methods == EVMETHOD_AUTO)	702	if (methods == EVMETHOD_AUTO)
545	if (!enable_secure () && getenv ("LIBEV_METHODS"))	703	if (!enable_secure () && getenv ("LIBEV_METHODS"))
546	methods = atoi (getenv ("LIBEV_METHODS"));	704	methods = atoi (getenv ("LIBEV_METHODS"));
547	else	705	else
548	methods = EVMETHOD_ANY;	706	methods = EVMETHOD_ANY;
549		707
550	ev_method = 0;	708	method = 0;
		709	#if EV_USE_WIN32
		710	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		711	#endif
551	#if EV_USE_KQUEUE	712	#if EV_USE_KQUEUE
552	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	713	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
553	#endif	714	#endif
554	#if EV_USE_EPOLL	715	#if EV_USE_EPOLL
555	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	716	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
556	#endif	717	#endif
557	#if EV_USE_POLL	718	#if EV_USE_POLL
558	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	719	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
559	#endif	720	#endif
560	#if EV_USE_SELECT	721	#if EV_USE_SELECT
561	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	722	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
562	#endif	723	#endif
563		724
		725	ev_watcher_init (&sigev, sigcb);
		726	ev_set_priority (&sigev, EV_MAXPRI);
		727	}
		728	}
		729
		730	void
		731	loop_destroy (EV_P)
		732	{
		733	int i;
		734
		735	#if EV_USE_WIN32
		736	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		737	#endif
		738	#if EV_USE_KQUEUE
		739	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		740	#endif
		741	#if EV_USE_EPOLL
		742	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		743	#endif
		744	#if EV_USE_POLL
		745	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		746	#endif
		747	#if EV_USE_SELECT
		748	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		749	#endif
		750
		751	for (i = NUMPRI; i--; )
		752	array_free (pending, [i]);
		753
		754	/* have to use the microsoft-never-gets-it-right macro */
		755	array_free_microshit (fdchange);
		756	array_free_microshit (timer);
		757	array_free_microshit (periodic);
		758	array_free_microshit (idle);
		759	array_free_microshit (prepare);
		760	array_free_microshit (check);
		761
		762	method = 0;
		763	}
		764
		765	static void
		766	loop_fork (EV_P)
		767	{
		768	#if EV_USE_EPOLL
		769	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		770	#endif
		771	#if EV_USE_KQUEUE
		772	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		773	#endif
		774
		775	if (ev_is_active (&sigev))
		776	{
		777	/* default loop */
		778
		779	ev_ref (EV_A);
		780	ev_io_stop (EV_A_ &sigev);
		781	close (sigpipe [0]);
		782	close (sigpipe [1]);
		783
		784	while (pipe (sigpipe))
		785	syserr ("(libev) error creating pipe");
		786
		787	siginit (EV_A);
		788	}
		789
		790	postfork = 0;
		791	}
		792
		793	#if EV_MULTIPLICITY
		794	struct ev_loop *
		795	ev_loop_new (int methods)
		796	{
		797	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		798
		799	memset (loop, 0, sizeof (struct ev_loop));
		800
		801	loop_init (EV_A_ methods);
		802
		803	if (ev_method (EV_A))
		804	return loop;
		805
		806	return 0;
		807	}
		808
		809	void
		810	ev_loop_destroy (EV_P)
		811	{
		812	loop_destroy (EV_A);
		813	ev_free (loop);
		814	}
		815
		816	void
		817	ev_loop_fork (EV_P)
		818	{
		819	postfork = 1;
		820	}
		821
		822	#endif
		823
		824	#if EV_MULTIPLICITY
		825	struct ev_loop default_loop_struct;
		826	static struct ev_loop *default_loop;
		827
		828	struct ev_loop *
		829	#else
		830	static int default_loop;
		831
		832	int
		833	#endif
		834	ev_default_loop (int methods)
		835	{
		836	if (sigpipe [0] == sigpipe [1])
		837	if (pipe (sigpipe))
		838	return 0;
		839
		840	if (!default_loop)
		841	{
		842	#if EV_MULTIPLICITY
		843	struct ev_loop *loop = default_loop = &default_loop_struct;
		844	#else
		845	default_loop = 1;
		846	#endif
		847
		848	loop_init (EV_A_ methods);
		849
564	if (ev_method)	850	if (ev_method (EV_A))
565	{	851	{
566	ev_watcher_init (&sigev, sigcb);
567	siginit ();	852	siginit (EV_A);
568		853
		854	#ifndef WIN32
569	ev_signal_init (&childev, childcb, SIGCHLD);	855	ev_signal_init (&childev, childcb, SIGCHLD);
		856	ev_set_priority (&childev, EV_MAXPRI);
570	ev_signal_start (&childev);	857	ev_signal_start (EV_A_ &childev);
		858	ev_unref (EV_A); /* child watcher should not keep loop alive */
		859	#endif
571	}	860	}
		861	else
		862	default_loop = 0;
572	}	863	}
573		864
574	return ev_method;	865	return default_loop;
		866	}
		867
		868	void
		869	ev_default_destroy (void)
		870	{
		871	#if EV_MULTIPLICITY
		872	struct ev_loop *loop = default_loop;
		873	#endif
		874
		875	#ifndef WIN32
		876	ev_ref (EV_A); /* child watcher */
		877	ev_signal_stop (EV_A_ &childev);
		878	#endif
		879
		880	ev_ref (EV_A); /* signal watcher */
		881	ev_io_stop (EV_A_ &sigev);
		882
		883	close (sigpipe [0]); sigpipe [0] = 0;
		884	close (sigpipe [1]); sigpipe [1] = 0;
		885
		886	loop_destroy (EV_A);
		887	}
		888
		889	void
		890	ev_default_fork (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
		896	if (method)
		897	postfork = 1;
575	}	898	}
576		899
577	/*****************************************************************************/	900	/*****************************************************************************/
578		901
579	void
580	ev_fork_prepare (void)
581	{
582	/* nop */
583	}
584
585	void
586	ev_fork_parent (void)
587	{
588	/* nop */
589	}
590
591	void
592	ev_fork_child (void)
593	{
594	#if EV_USE_EPOLL
595	if (ev_method == EVMETHOD_EPOLL)
596	epoll_postfork_child ();
597	#endif
598
599	ev_io_stop (&sigev);
600	close (sigpipe [0]);
601	close (sigpipe [1]);
602	pipe (sigpipe);
603	siginit ();
604	}
605
606	/*****************************************************************************/
607
608	static void	902	static void
609	call_pending (void)	903	call_pending (EV_P)
610	{	904	{
611	int pri;	905	int pri;
612		906
613	for (pri = NUMPRI; pri--; )	907	for (pri = NUMPRI; pri--; )
614	while (pendingcnt [pri])	908	while (pendingcnt [pri])
…		…
616	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	910	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
617		911
618	if (p->w)	912	if (p->w)
619	{	913	{
620	p->w->pending = 0;	914	p->w->pending = 0;
621	p->w->cb (p->w, p->events);	915	p->w->cb (EV_A_ p->w, p->events);
622	}	916	}
623	}	917	}
624	}	918	}
625		919
626	static void	920	static void
627	timers_reify (void)	921	timers_reify (EV_P)
628	{	922	{
629	while (timercnt && timers [0]->at <= now)	923	while (timercnt && ((WT)timers [0])->at <= mn_now)
630	{	924	{
631	struct ev_timer *w = timers [0];	925	struct ev_timer *w = timers [0];
		926
		927	assert (("inactive timer on timer heap detected", ev_is_active (w)));
632		928
633	/* first reschedule or stop timer */	929	/* first reschedule or stop timer */
634	if (w->repeat)	930	if (w->repeat)
635	{	931	{
636	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	932	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
637	w->at = now + w->repeat;	933	((WT)w)->at = mn_now + w->repeat;
638	downheap ((WT *)timers, timercnt, 0);	934	downheap ((WT *)timers, timercnt, 0);
639	}	935	}
640	else	936	else
641	ev_timer_stop (w); /* nonrepeating: stop timer */	937	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
642		938
643	event ((W)w, EV_TIMEOUT);	939	event (EV_A_ (W)w, EV_TIMEOUT);
644	}	940	}
645	}	941	}
646		942
647	static void	943	static void
648	periodics_reify (void)	944	periodics_reify (EV_P)
649	{	945	{
650	while (periodiccnt && periodics [0]->at <= ev_now)	946	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
651	{	947	{
652	struct ev_periodic *w = periodics [0];	948	struct ev_periodic *w = periodics [0];
		949
		950	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
653		951
654	/* first reschedule or stop timer */	952	/* first reschedule or stop timer */
655	if (w->interval)	953	if (w->interval)
656	{	954	{
657	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	955	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
658	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	956	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
659	downheap ((WT *)periodics, periodiccnt, 0);	957	downheap ((WT *)periodics, periodiccnt, 0);
660	}	958	}
661	else	959	else
662	ev_periodic_stop (w); /* nonrepeating: stop timer */	960	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
663		961
664	event ((W)w, EV_PERIODIC);	962	event (EV_A_ (W)w, EV_PERIODIC);
665	}	963	}
666	}	964	}
667		965
668	static void	966	static void
669	periodics_reschedule (ev_tstamp diff)	967	periodics_reschedule (EV_P)
670	{	968	{
671	int i;	969	int i;
672		970
673	/* adjust periodics after time jump */	971	/* adjust periodics after time jump */
674	for (i = 0; i < periodiccnt; ++i)	972	for (i = 0; i < periodiccnt; ++i)
675	{	973	{
676	struct ev_periodic *w = periodics [i];	974	struct ev_periodic *w = periodics [i];
677		975
678	if (w->interval)	976	if (w->interval)
679	{	977	{
680	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	978	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
681		979
682	if (fabs (diff) >= 1e-4)	980	if (fabs (diff) >= 1e-4)
683	{	981	{
684	ev_periodic_stop (w);	982	ev_periodic_stop (EV_A_ w);
685	ev_periodic_start (w);	983	ev_periodic_start (EV_A_ w);
686		984
687	i = 0; /* restart loop, inefficient, but time jumps should be rare */	985	i = 0; /* restart loop, inefficient, but time jumps should be rare */
688	}	986	}
689	}	987	}
690	}	988	}
691	}	989	}
692		990
693	static int	991	inline int
694	time_update_monotonic (void)	992	time_update_monotonic (EV_P)
695	{	993	{
696	now = get_clock ();	994	mn_now = get_clock ();
697		995
698	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	996	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
699	{	997	{
700	ev_now = now + diff;	998	rt_now = rtmn_diff + mn_now;
701	return 0;	999	return 0;
702	}	1000	}
703	else	1001	else
704	{	1002	{
705	now_floor = now;	1003	now_floor = mn_now;
706	ev_now = ev_time ();	1004	rt_now = ev_time ();
707	return 1;	1005	return 1;
708	}	1006	}
709	}	1007	}
710		1008
711	static void	1009	static void
712	time_update (void)	1010	time_update (EV_P)
713	{	1011	{
714	int i;	1012	int i;
715		1013
716	#if EV_USE_MONOTONIC	1014	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	1015	if (expect_true (have_monotonic))
718	{	1016	{
719	if (time_update_monotonic ())	1017	if (time_update_monotonic (EV_A))
720	{	1018	{
721	ev_tstamp odiff = diff;	1019	ev_tstamp odiff = rtmn_diff;
722		1020
723	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1021	for (i = 4; --i; ) /* loop a few times, before making important decisions */
724	{	1022	{
725	diff = ev_now - now;	1023	rtmn_diff = rt_now - mn_now;
726		1024
727	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1025	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
728	return; /* all is well */	1026	return; /* all is well */
729		1027
730	ev_now = ev_time ();	1028	rt_now = ev_time ();
731	now = get_clock ();	1029	mn_now = get_clock ();
732	now_floor = now;	1030	now_floor = mn_now;
733	}	1031	}
734		1032
735	periodics_reschedule (diff - odiff);	1033	periodics_reschedule (EV_A);
736	/* no timer adjustment, as the monotonic clock doesn't jump */	1034	/* no timer adjustment, as the monotonic clock doesn't jump */
		1035	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
737	}	1036	}
738	}	1037	}
739	else	1038	else
740	#endif	1039	#endif
741	{	1040	{
742	ev_now = ev_time ();	1041	rt_now = ev_time ();
743		1042
744	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1043	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
745	{	1044	{
746	periodics_reschedule (ev_now - now);	1045	periodics_reschedule (EV_A);
747		1046
748	/* adjust timers. this is easy, as the offset is the same for all */	1047	/* adjust timers. this is easy, as the offset is the same for all */
749	for (i = 0; i < timercnt; ++i)	1048	for (i = 0; i < timercnt; ++i)
750	timers [i]->at += diff;	1049	((WT)timers [i])->at += rt_now - mn_now;
751	}	1050	}
752		1051
753	now = ev_now;	1052	mn_now = rt_now;
754	}	1053	}
755	}	1054	}
756		1055
757	int ev_loop_done;	1056	void
		1057	ev_ref (EV_P)
		1058	{
		1059	++activecnt;
		1060	}
758		1061
		1062	void
		1063	ev_unref (EV_P)
		1064	{
		1065	--activecnt;
		1066	}
		1067
		1068	static int loop_done;
		1069
		1070	void
759	void ev_loop (int flags)	1071	ev_loop (EV_P_ int flags)
760	{	1072	{
761	double block;	1073	double block;
762	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1074	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
763		1075
764	do	1076	do
765	{	1077	{
766	/* queue check watchers (and execute them) */	1078	/* queue check watchers (and execute them) */
767	if (expect_false (preparecnt))	1079	if (expect_false (preparecnt))
768	{	1080	{
769	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1081	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
770	call_pending ();	1082	call_pending (EV_A);
771	}	1083	}
772		1084
		1085	/* we might have forked, so reify kernel state if necessary */
		1086	if (expect_false (postfork))
		1087	loop_fork (EV_A);
		1088
773	/* update fd-related kernel structures */	1089	/* update fd-related kernel structures */
774	fd_reify ();	1090	fd_reify (EV_A);
775		1091
776	/* calculate blocking time */	1092	/* calculate blocking time */
777		1093
778	/* we only need this for !monotonic clockor timers, but as we basically	1094	/* we only need this for !monotonic clockor timers, but as we basically
779	always have timers, we just calculate it always */	1095	always have timers, we just calculate it always */
780	#if EV_USE_MONOTONIC	1096	#if EV_USE_MONOTONIC
781	if (expect_true (have_monotonic))	1097	if (expect_true (have_monotonic))
782	time_update_monotonic ();	1098	time_update_monotonic (EV_A);
783	else	1099	else
784	#endif	1100	#endif
785	{	1101	{
786	ev_now = ev_time ();	1102	rt_now = ev_time ();
787	now = ev_now;	1103	mn_now = rt_now;
788	}	1104	}
789		1105
790	if (flags & EVLOOP_NONBLOCK || idlecnt)	1106	if (flags & EVLOOP_NONBLOCK || idlecnt)
791	block = 0.;	1107	block = 0.;
792	else	1108	else
793	{	1109	{
794	block = MAX_BLOCKTIME;	1110	block = MAX_BLOCKTIME;
795		1111
796	if (timercnt)	1112	if (timercnt)
797	{	1113	{
798	ev_tstamp to = timers [0]->at - now + method_fudge;	1114	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
799	if (block > to) block = to;	1115	if (block > to) block = to;
800	}	1116	}
801		1117
802	if (periodiccnt)	1118	if (periodiccnt)
803	{	1119	{
804	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1120	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
805	if (block > to) block = to;	1121	if (block > to) block = to;
806	}	1122	}
807		1123
808	if (block < 0.) block = 0.;	1124	if (block < 0.) block = 0.;
809	}	1125	}
810		1126
811	method_poll (block);	1127	method_poll (EV_A_ block);
812		1128
813	/* update ev_now, do magic */	1129	/* update rt_now, do magic */
814	time_update ();	1130	time_update (EV_A);
815		1131
816	/* queue pending timers and reschedule them */	1132	/* queue pending timers and reschedule them */
817	timers_reify (); /* relative timers called last */	1133	timers_reify (EV_A); /* relative timers called last */
818	periodics_reify (); /* absolute timers called first */	1134	periodics_reify (EV_A); /* absolute timers called first */
819		1135
820	/* queue idle watchers unless io or timers are pending */	1136	/* queue idle watchers unless io or timers are pending */
821	if (!pendingcnt)	1137	if (!pendingcnt)
822	queue_events ((W *)idles, idlecnt, EV_IDLE);	1138	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
823		1139
824	/* queue check watchers, to be executed first */	1140	/* queue check watchers, to be executed first */
825	if (checkcnt)	1141	if (checkcnt)
826	queue_events ((W *)checks, checkcnt, EV_CHECK);	1142	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
827		1143
828	call_pending ();	1144	call_pending (EV_A);
829	}	1145	}
830	while (!ev_loop_done);	1146	while (activecnt && !loop_done);
831		1147
832	if (ev_loop_done != 2)	1148	if (loop_done != 2)
833	ev_loop_done = 0;	1149	loop_done = 0;
		1150	}
		1151
		1152	void
		1153	ev_unloop (EV_P_ int how)
		1154	{
		1155	loop_done = how;
834	}	1156	}
835		1157
836	/*****************************************************************************/	1158	/*****************************************************************************/
837		1159
838	static void	1160	inline void
839	wlist_add (WL *head, WL elem)	1161	wlist_add (WL *head, WL elem)
840	{	1162	{
841	elem->next = *head;	1163	elem->next = *head;
842	*head = elem;	1164	*head = elem;
843	}	1165	}
844		1166
845	static void	1167	inline void
846	wlist_del (WL *head, WL elem)	1168	wlist_del (WL *head, WL elem)
847	{	1169	{
848	while (*head)	1170	while (*head)
849	{	1171	{
850	if (*head == elem)	1172	if (*head == elem)
…		…
855		1177
856	head = &(*head)->next;	1178	head = &(*head)->next;
857	}	1179	}
858	}	1180	}
859		1181
860	static void	1182	inline void
861	ev_clear_pending (W w)	1183	ev_clear_pending (EV_P_ W w)
862	{	1184	{
863	if (w->pending)	1185	if (w->pending)
864	{	1186	{
865	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1187	pendings [ABSPRI (w)][w->pending - 1].w = 0;
866	w->pending = 0;	1188	w->pending = 0;
867	}	1189	}
868	}	1190	}
869		1191
870	static void	1192	inline void
871	ev_start (W w, int active)	1193	ev_start (EV_P_ W w, int active)
872	{	1194	{
873	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1195	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
874	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1196	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
875		1197
876	w->active = active;	1198	w->active = active;
		1199	ev_ref (EV_A);
877	}	1200	}
878		1201
879	static void	1202	inline void
880	ev_stop (W w)	1203	ev_stop (EV_P_ W w)
881	{	1204	{
		1205	ev_unref (EV_A);
882	w->active = 0;	1206	w->active = 0;
883	}	1207	}
884		1208
885	/*****************************************************************************/	1209	/*****************************************************************************/
886		1210
887	void	1211	void
888	ev_io_start (struct ev_io *w)	1212	ev_io_start (EV_P_ struct ev_io *w)
889	{	1213	{
890	int fd = w->fd;	1214	int fd = w->fd;
891		1215
892	if (ev_is_active (w))	1216	if (ev_is_active (w))
893	return;	1217	return;
894		1218
895	assert (("ev_io_start called with negative fd", fd >= 0));	1219	assert (("ev_io_start called with negative fd", fd >= 0));
896		1220
897	ev_start ((W)w, 1);	1221	ev_start (EV_A_ (W)w, 1);
898	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1222	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
899	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1223	wlist_add ((WL *)&anfds[fd].head, (WL)w);
900		1224
901	fd_change (fd);	1225	fd_change (EV_A_ fd);
902	}	1226	}
903		1227
904	void	1228	void
905	ev_io_stop (struct ev_io *w)	1229	ev_io_stop (EV_P_ struct ev_io *w)
906	{	1230	{
907	ev_clear_pending ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
908	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
909	return;	1233	return;
910		1234
911	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1235	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
912	ev_stop ((W)w);	1236	ev_stop (EV_A_ (W)w);
913		1237
914	fd_change (w->fd);	1238	fd_change (EV_A_ w->fd);
915	}	1239	}
916		1240
917	void	1241	void
918	ev_timer_start (struct ev_timer *w)	1242	ev_timer_start (EV_P_ struct ev_timer *w)
919	{	1243	{
920	if (ev_is_active (w))	1244	if (ev_is_active (w))
921	return;	1245	return;
922		1246
923	w->at += now;	1247	((WT)w)->at += mn_now;
924		1248
925	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1249	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
926		1250
927	ev_start ((W)w, ++timercnt);	1251	ev_start (EV_A_ (W)w, ++timercnt);
928	array_needsize (timers, timermax, timercnt, );	1252	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
929	timers [timercnt - 1] = w;	1253	timers [timercnt - 1] = w;
930	upheap ((WT *)timers, timercnt - 1);	1254	upheap ((WT *)timers, timercnt - 1);
931	}
932		1255
		1256	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1257	}
		1258
933	void	1259	void
934	ev_timer_stop (struct ev_timer *w)	1260	ev_timer_stop (EV_P_ struct ev_timer *w)
935	{	1261	{
936	ev_clear_pending ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
937	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
938	return;	1264	return;
939		1265
		1266	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1267
940	if (w->active < timercnt--)	1268	if (((W)w)->active < timercnt--)
941	{	1269	{
942	timers [w->active - 1] = timers [timercnt];	1270	timers [((W)w)->active - 1] = timers [timercnt];
943	downheap ((WT *)timers, timercnt, w->active - 1);	1271	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
944	}	1272	}
945		1273
946	w->at = w->repeat;	1274	((WT)w)->at = w->repeat;
947		1275
948	ev_stop ((W)w);	1276	ev_stop (EV_A_ (W)w);
949	}	1277	}
950		1278
951	void	1279	void
952	ev_timer_again (struct ev_timer *w)	1280	ev_timer_again (EV_P_ struct ev_timer *w)
953	{	1281	{
954	if (ev_is_active (w))	1282	if (ev_is_active (w))
955	{	1283	{
956	if (w->repeat)	1284	if (w->repeat)
957	{	1285	{
958	w->at = now + w->repeat;	1286	((WT)w)->at = mn_now + w->repeat;
959	downheap ((WT *)timers, timercnt, w->active - 1);	1287	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
960	}	1288	}
961	else	1289	else
962	ev_timer_stop (w);	1290	ev_timer_stop (EV_A_ w);
963	}	1291	}
964	else if (w->repeat)	1292	else if (w->repeat)
965	ev_timer_start (w);	1293	ev_timer_start (EV_A_ w);
966	}	1294	}
967		1295
968	void	1296	void
969	ev_periodic_start (struct ev_periodic *w)	1297	ev_periodic_start (EV_P_ struct ev_periodic *w)
970	{	1298	{
971	if (ev_is_active (w))	1299	if (ev_is_active (w))
972	return;	1300	return;
973		1301
974	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1302	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
975		1303
976	/* this formula differs from the one in periodic_reify because we do not always round up */	1304	/* this formula differs from the one in periodic_reify because we do not always round up */
977	if (w->interval)	1305	if (w->interval)
978	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1306	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
979		1307
980	ev_start ((W)w, ++periodiccnt);	1308	ev_start (EV_A_ (W)w, ++periodiccnt);
981	array_needsize (periodics, periodicmax, periodiccnt, );	1309	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
982	periodics [periodiccnt - 1] = w;	1310	periodics [periodiccnt - 1] = w;
983	upheap ((WT *)periodics, periodiccnt - 1);	1311	upheap ((WT *)periodics, periodiccnt - 1);
984	}
985		1312
		1313	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1314	}
		1315
986	void	1316	void
987	ev_periodic_stop (struct ev_periodic *w)	1317	ev_periodic_stop (EV_P_ struct ev_periodic *w)
988	{	1318	{
989	ev_clear_pending ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
990	if (!ev_is_active (w))	1320	if (!ev_is_active (w))
991	return;	1321	return;
992		1322
		1323	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1324
993	if (w->active < periodiccnt--)	1325	if (((W)w)->active < periodiccnt--)
994	{	1326	{
995	periodics [w->active - 1] = periodics [periodiccnt];	1327	periodics [((W)w)->active - 1] = periodics [periodiccnt];
996	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1328	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
997	}	1329	}
998		1330
999	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
1000	}	1332	}
1001		1333
1002	void	1334	void
1003	ev_signal_start (struct ev_signal *w)	1335	ev_idle_start (EV_P_ struct ev_idle *w)
1004	{	1336	{
1005	if (ev_is_active (w))	1337	if (ev_is_active (w))
1006	return;	1338	return;
1007		1339
		1340	ev_start (EV_A_ (W)w, ++idlecnt);
		1341	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1342	idles [idlecnt - 1] = w;
		1343	}
		1344
		1345	void
		1346	ev_idle_stop (EV_P_ struct ev_idle *w)
		1347	{
		1348	ev_clear_pending (EV_A_ (W)w);
		1349	if (ev_is_active (w))
		1350	return;
		1351
		1352	idles [((W)w)->active - 1] = idles [--idlecnt];
		1353	ev_stop (EV_A_ (W)w);
		1354	}
		1355
		1356	void
		1357	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1358	{
		1359	if (ev_is_active (w))
		1360	return;
		1361
		1362	ev_start (EV_A_ (W)w, ++preparecnt);
		1363	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1364	prepares [preparecnt - 1] = w;
		1365	}
		1366
		1367	void
		1368	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1369	{
		1370	ev_clear_pending (EV_A_ (W)w);
		1371	if (ev_is_active (w))
		1372	return;
		1373
		1374	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1375	ev_stop (EV_A_ (W)w);
		1376	}
		1377
		1378	void
		1379	ev_check_start (EV_P_ struct ev_check *w)
		1380	{
		1381	if (ev_is_active (w))
		1382	return;
		1383
		1384	ev_start (EV_A_ (W)w, ++checkcnt);
		1385	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1386	checks [checkcnt - 1] = w;
		1387	}
		1388
		1389	void
		1390	ev_check_stop (EV_P_ struct ev_check *w)
		1391	{
		1392	ev_clear_pending (EV_A_ (W)w);
		1393	if (ev_is_active (w))
		1394	return;
		1395
		1396	checks [((W)w)->active - 1] = checks [--checkcnt];
		1397	ev_stop (EV_A_ (W)w);
		1398	}
		1399
		1400	#ifndef SA_RESTART
		1401	# define SA_RESTART 0
		1402	#endif
		1403
		1404	void
		1405	ev_signal_start (EV_P_ struct ev_signal *w)
		1406	{
		1407	#if EV_MULTIPLICITY
		1408	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1409	#endif
		1410	if (ev_is_active (w))
		1411	return;
		1412
1008	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1413	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1009		1414
1010	ev_start ((W)w, 1);	1415	ev_start (EV_A_ (W)w, 1);
1011	array_needsize (signals, signalmax, w->signum, signals_init);	1416	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1012	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1417	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1013		1418
1014	if (!w->next)	1419	if (!((WL)w)->next)
1015	{	1420	{
		1421	#if WIN32
		1422	signal (w->signum, sighandler);
		1423	#else
1016	struct sigaction sa;	1424	struct sigaction sa;
1017	sa.sa_handler = sighandler;	1425	sa.sa_handler = sighandler;
1018	sigfillset (&sa.sa_mask);	1426	sigfillset (&sa.sa_mask);
1019	sa.sa_flags = 0;	1427	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1020	sigaction (w->signum, &sa, 0);	1428	sigaction (w->signum, &sa, 0);
		1429	#endif
1021	}	1430	}
1022	}	1431	}
1023		1432
1024	void	1433	void
1025	ev_signal_stop (struct ev_signal *w)	1434	ev_signal_stop (EV_P_ struct ev_signal *w)
1026	{	1435	{
1027	ev_clear_pending ((W)w);	1436	ev_clear_pending (EV_A_ (W)w);
1028	if (!ev_is_active (w))	1437	if (!ev_is_active (w))
1029	return;	1438	return;
1030		1439
1031	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1440	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1032	ev_stop ((W)w);	1441	ev_stop (EV_A_ (W)w);
1033		1442
1034	if (!signals [w->signum - 1].head)	1443	if (!signals [w->signum - 1].head)
1035	signal (w->signum, SIG_DFL);	1444	signal (w->signum, SIG_DFL);
1036	}	1445	}
1037		1446
1038	void	1447	void
1039	ev_idle_start (struct ev_idle *w)	1448	ev_child_start (EV_P_ struct ev_child *w)
1040	{	1449	{
		1450	#if EV_MULTIPLICITY
		1451	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1452	#endif
1041	if (ev_is_active (w))	1453	if (ev_is_active (w))
1042	return;	1454	return;
1043		1455
1044	ev_start ((W)w, ++idlecnt);	1456	ev_start (EV_A_ (W)w, 1);
1045	array_needsize (idles, idlemax, idlecnt, );	1457	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1046	idles [idlecnt - 1] = w;
1047	}	1458	}
1048		1459
1049	void	1460	void
1050	ev_idle_stop (struct ev_idle *w)	1461	ev_child_stop (EV_P_ struct ev_child *w)
1051	{	1462	{
1052	ev_clear_pending ((W)w);	1463	ev_clear_pending (EV_A_ (W)w);
1053	if (ev_is_active (w))	1464	if (ev_is_active (w))
1054	return;	1465	return;
1055		1466
1056	idles [w->active - 1] = idles [--idlecnt];
1057	ev_stop ((W)w);
1058	}
1059
1060	void
1061	ev_prepare_start (struct ev_prepare *w)
1062	{
1063	if (ev_is_active (w))
1064	return;
1065
1066	ev_start ((W)w, ++preparecnt);
1067	array_needsize (prepares, preparemax, preparecnt, );
1068	prepares [preparecnt - 1] = w;
1069	}
1070
1071	void
1072	ev_prepare_stop (struct ev_prepare *w)
1073	{
1074	ev_clear_pending ((W)w);
1075	if (ev_is_active (w))
1076	return;
1077
1078	prepares [w->active - 1] = prepares [--preparecnt];
1079	ev_stop ((W)w);
1080	}
1081
1082	void
1083	ev_check_start (struct ev_check *w)
1084	{
1085	if (ev_is_active (w))
1086	return;
1087
1088	ev_start ((W)w, ++checkcnt);
1089	array_needsize (checks, checkmax, checkcnt, );
1090	checks [checkcnt - 1] = w;
1091	}
1092
1093	void
1094	ev_check_stop (struct ev_check *w)
1095	{
1096	ev_clear_pending ((W)w);
1097	if (ev_is_active (w))
1098	return;
1099
1100	checks [w->active - 1] = checks [--checkcnt];
1101	ev_stop ((W)w);
1102	}
1103
1104	void
1105	ev_child_start (struct ev_child *w)
1106	{
1107	if (ev_is_active (w))
1108	return;
1109
1110	ev_start ((W)w, 1);
1111	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1112	}
1113
1114	void
1115	ev_child_stop (struct ev_child *w)
1116	{
1117	ev_clear_pending ((W)w);
1118	if (ev_is_active (w))
1119	return;
1120
1121	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1467	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1122	ev_stop ((W)w);	1468	ev_stop (EV_A_ (W)w);
1123	}	1469	}
1124		1470
1125	/*****************************************************************************/	1471	/*****************************************************************************/
1126		1472
1127	struct ev_once	1473	struct ev_once
…		…
1131	void (*cb)(int revents, void *arg);	1477	void (*cb)(int revents, void *arg);
1132	void *arg;	1478	void *arg;
1133	};	1479	};
1134		1480
1135	static void	1481	static void
1136	once_cb (struct ev_once *once, int revents)	1482	once_cb (EV_P_ struct ev_once *once, int revents)
1137	{	1483	{
1138	void (*cb)(int revents, void *arg) = once->cb;	1484	void (*cb)(int revents, void *arg) = once->cb;
1139	void *arg = once->arg;	1485	void *arg = once->arg;
1140		1486
1141	ev_io_stop (&once->io);	1487	ev_io_stop (EV_A_ &once->io);
1142	ev_timer_stop (&once->to);	1488	ev_timer_stop (EV_A_ &once->to);
1143	free (once);	1489	ev_free (once);
1144		1490
1145	cb (revents, arg);	1491	cb (revents, arg);
1146	}	1492	}
1147		1493
1148	static void	1494	static void
1149	once_cb_io (struct ev_io *w, int revents)	1495	once_cb_io (EV_P_ struct ev_io *w, int revents)
1150	{	1496	{
1151	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1497	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1152	}	1498	}
1153		1499
1154	static void	1500	static void
1155	once_cb_to (struct ev_timer *w, int revents)	1501	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1156	{	1502	{
1157	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1503	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1158	}	1504	}
1159		1505
1160	void	1506	void
1161	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1507	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1162	{	1508	{
1163	struct ev_once *once = malloc (sizeof (struct ev_once));	1509	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1164		1510
1165	if (!once)	1511	if (!once)
1166	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1512	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1167	else	1513	else
1168	{	1514	{
…		…
1171		1517
1172	ev_watcher_init (&once->io, once_cb_io);	1518	ev_watcher_init (&once->io, once_cb_io);
1173	if (fd >= 0)	1519	if (fd >= 0)
1174	{	1520	{
1175	ev_io_set (&once->io, fd, events);	1521	ev_io_set (&once->io, fd, events);
1176	ev_io_start (&once->io);	1522	ev_io_start (EV_A_ &once->io);
1177	}	1523	}
1178		1524
1179	ev_watcher_init (&once->to, once_cb_to);	1525	ev_watcher_init (&once->to, once_cb_to);
1180	if (timeout >= 0.)	1526	if (timeout >= 0.)
1181	{	1527	{
1182	ev_timer_set (&once->to, timeout, 0.);	1528	ev_timer_set (&once->to, timeout, 0.);
1183	ev_timer_start (&once->to);	1529	ev_timer_start (EV_A_ &once->to);
1184	}	1530	}
1185	}	1531	}
1186	}	1532	}
1187		1533
1188	/*****************************************************************************/
1189
1190	#if 0
1191
1192	struct ev_io wio;
1193
1194	static void
1195	sin_cb (struct ev_io *w, int revents)
1196	{
1197	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1198	}
1199
1200	static void
1201	ocb (struct ev_timer *w, int revents)
1202	{
1203	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1204	ev_timer_stop (w);
1205	ev_timer_start (w);
1206	}
1207
1208	static void
1209	scb (struct ev_signal *w, int revents)
1210	{
1211	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1212	ev_io_stop (&wio);
1213	ev_io_start (&wio);
1214	}
1215
1216	static void
1217	gcb (struct ev_signal *w, int revents)
1218	{
1219	fprintf (stderr, "generic %x\n", revents);
1220
1221	}
1222
1223	int main (void)
1224	{
1225	ev_init (0);
1226
1227	ev_io_init (&wio, sin_cb, 0, EV_READ);
1228	ev_io_start (&wio);
1229
1230	struct ev_timer t[10000];
1231
1232	#if 0
1233	int i;
1234	for (i = 0; i < 10000; ++i)
1235	{
1236	struct ev_timer *w = t + i;
1237	ev_watcher_init (w, ocb, i);
1238	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1239	ev_timer_start (w);
1240	if (drand48 () < 0.5)
1241	ev_timer_stop (w);
1242	}
1243	#endif
1244
1245	struct ev_timer t1;
1246	ev_timer_init (&t1, ocb, 5, 10);
1247	ev_timer_start (&t1);
1248
1249	struct ev_signal sig;
1250	ev_signal_init (&sig, scb, SIGQUIT);
1251	ev_signal_start (&sig);
1252
1253	struct ev_check cw;
1254	ev_check_init (&cw, gcb);
1255	ev_check_start (&cw);
1256
1257	struct ev_idle iw;
1258	ev_idle_init (&iw, gcb);
1259	ev_idle_start (&iw);
1260
1261	ev_loop (0);
1262
1263	return 0;
1264	}
1265
1266	#endif
1267
1268
1269
1270

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