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

Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs.
Revision 1.69 by root, Tue Nov 6 00:10:04 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	30	*/
31	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
32	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
33	#endif	55	#endif
34		56
35	#include <math.h>	57	#include <math.h>
36	#include <stdlib.h>	58	#include <stdlib.h>
37	#include <unistd.h>	59	#include <unistd.h>
…		…
42	#include <stdio.h>	64	#include <stdio.h>
43		65
44	#include <assert.h>	66	#include <assert.h>
45	#include <errno.h>	67	#include <errno.h>
46	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
47	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
48	#include <sys/time.h>	72	#include <sys/time.h>
49	#include <time.h>	73	#include <time.h>
50		74
		75	/**/
		76
51	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
54	# endif
55	#endif	79	#endif
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
63	#endif	91	#endif
64		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
65	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
67	#endif	119	#endif
68	#ifndef EV_USE_REALTIME	120
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
70	#endif
71		122
72	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
73	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
74	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
75	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
76		127
77	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
78		143
79	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
82		147
83	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
84	ev_tstamp ev_now;
85	int ev_method;
86		149
87	static int have_monotonic; /* runtime */	150	#if WIN32
88		151	/* note: the comment below could not be substantiated, but what would I care */
89	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
90	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
91	static void (*method_poll)(ev_tstamp timeout);	154	#endif
92		155
93	/*****************************************************************************/	156	/*****************************************************************************/
94		157
95	ev_tstamp	158	static void (*syserr_cb)(void);
		159
		160	void ev_set_syserr_cb (void (*cb)(void))
		161	{
		162	syserr_cb = cb;
		163	}
		164
		165	static void
		166	syserr (void)
		167	{
		168	if (syserr_cb)
		169	syserr_cb ();
		170	else
		171	{
		172	perror ("libev");
		173	abort ();
		174	}
		175	}
		176
		177	static void (alloc)(void *ptr, long size);
		178
		179	void ev_set_allocator (void (cb)(void *ptr, long size))
		180	{
		181	alloc = cb;
		182	}
		183
		184	static void *
		185	ev_realloc (void *ptr, long size)
		186	{
		187	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		188
		189	if (!ptr && size)
		190	{
		191	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		192	abort ();
		193	}
		194
		195	return ptr;
		196	}
		197
		198	#define ev_malloc(size) ev_realloc (0, (size))
		199	#define ev_free(ptr) ev_realloc ((ptr), 0)
		200
		201	/*****************************************************************************/
		202
		203	typedef struct
		204	{
		205	WL head;
		206	unsigned char events;
		207	unsigned char reify;
		208	} ANFD;
		209
		210	typedef struct
		211	{
		212	W w;
		213	int events;
		214	} ANPENDING;
		215
		216	#if EV_MULTIPLICITY
		217
		218	struct ev_loop
		219	{
		220	# define VAR(name,decl) decl;
		221	# include "ev_vars.h"
		222	};
		223	# undef VAR
		224	# include "ev_wrap.h"
		225
		226	#else
		227
		228	# define VAR(name,decl) static decl;
		229	# include "ev_vars.h"
		230	# undef VAR
		231
		232	#endif
		233
		234	/*****************************************************************************/
		235
		236	inline ev_tstamp
96	ev_time (void)	237	ev_time (void)
97	{	238	{
98	#if EV_USE_REALTIME	239	#if EV_USE_REALTIME
99	struct timespec ts;	240	struct timespec ts;
100	clock_gettime (CLOCK_REALTIME, &ts);	241	clock_gettime (CLOCK_REALTIME, &ts);
…		…
104	gettimeofday (&tv, 0);	245	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	246	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	247	#endif
107	}	248	}
108		249
109	static ev_tstamp	250	inline ev_tstamp
110	get_clock (void)	251	get_clock (void)
111	{	252	{
112	#if EV_USE_MONOTONIC	253	#if EV_USE_MONOTONIC
113	if (have_monotonic)	254	if (expect_true (have_monotonic))
114	{	255	{
115	struct timespec ts;	256	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	257	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	258	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	259	}
119	#endif	260	#endif
120		261
121	return ev_time ();	262	return ev_time ();
122	}	263	}
123		264
		265	ev_tstamp
		266	ev_now (EV_P)
		267	{
		268	return rt_now;
		269	}
		270
124	#define array_roundsize(base,n) ((n) \| 4 & ~3)	271	#define array_roundsize(base,n) ((n) \| 4 & ~3)
125		272
126	#define array_needsize(base,cur,cnt,init) \	273	#define array_needsize(base,cur,cnt,init) \
127	if ((cnt) > cur) \	274	if (expect_false ((cnt) > cur)) \
128	{ \	275	{ \
129	int newcnt = cur; \	276	int newcnt = cur; \
130	do \	277	do \
131	{ \	278	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	279	newcnt = array_roundsize (base, newcnt << 1); \
133	} \	280	} \
134	while ((cnt) > newcnt); \	281	while ((cnt) > newcnt); \
135	\	282	\
136	base = realloc (base, sizeof (base) (newcnt)); \	283	base = ev_realloc (base, sizeof (base) (newcnt)); \
137	init (base + cur, newcnt - cur); \	284	init (base + cur, newcnt - cur); \
138	cur = newcnt; \	285	cur = newcnt; \
139	}	286	}
		287
		288	#define array_slim(stem) \
		289	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		290	{ \
		291	stem ## max = array_roundsize (stem ## cnt >> 1); \
		292	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		293	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		294	}
		295
		296	#define array_free(stem, idx) \
		297	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
140		298
141	/*****************************************************************************/	299	/*****************************************************************************/
142
143	typedef struct
144	{
145	struct ev_io *head;
146	unsigned char events;
147	unsigned char reify;
148	} ANFD;
149
150	static ANFD *anfds;
151	static int anfdmax;
152		300
153	static void	301	static void
154	anfds_init (ANFD *base, int count)	302	anfds_init (ANFD *base, int count)
155	{	303	{
156	while (count--)	304	while (count--)
…		…
161		309
162	++base;	310	++base;
163	}	311	}
164	}	312	}
165		313
166	typedef struct
167	{
168	W w;
169	int events;
170	} ANPENDING;
171
172	static ANPENDING *pendings;
173	static int pendingmax, pendingcnt;
174
175	static void	314	static void
176	event (W w, int events)	315	event (EV_P_ W w, int events)
177	{	316	{
178	if (w->pending)	317	if (w->pending)
179	{	318	{
180	pendings [w->pending - 1].events \|= events;	319	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
181	return;	320	return;
182	}	321	}
183		322
184	w->pending = ++pendingcnt;	323	w->pending = ++pendingcnt [ABSPRI (w)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	324	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
186	pendings [pendingcnt - 1].w = w;	325	pendings [ABSPRI (w)][w->pending - 1].w = w;
187	pendings [pendingcnt - 1].events = events;	326	pendings [ABSPRI (w)][w->pending - 1].events = events;
188	}	327	}
189		328
190	static void	329	static void
191	queue_events (W *events, int eventcnt, int type)	330	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	331	{
193	int i;	332	int i;
194		333
195	for (i = 0; i < eventcnt; ++i)	334	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	335	event (EV_A_ events [i], type);
197	}	336	}
198		337
199	static void	338	static void
200	fd_event (int fd, int events)	339	fd_event (EV_P_ int fd, int events)
201	{	340	{
202	ANFD *anfd = anfds + fd;	341	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	342	struct ev_io *w;
204		343
205	for (w = anfd->head; w; w = w->next)	344	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
206	{	345	{
207	int ev = w->events & events;	346	int ev = w->events & events;
208		347
209	if (ev)	348	if (ev)
210	event ((W)w, ev);	349	event (EV_A_ (W)w, ev);
211	}	350	}
212	}	351	}
213		352
214	/*****************************************************************************/	353	/*****************************************************************************/
215		354
216	static int *fdchanges;
217	static int fdchangemax, fdchangecnt;
218
219	static void	355	static void
220	fd_reify (void)	356	fd_reify (EV_P)
221	{	357	{
222	int i;	358	int i;
223		359
224	for (i = 0; i < fdchangecnt; ++i)	360	for (i = 0; i < fdchangecnt; ++i)
225	{	361	{
…		…
227	ANFD *anfd = anfds + fd;	363	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	364	struct ev_io *w;
229		365
230	int events = 0;	366	int events = 0;
231		367
232	for (w = anfd->head; w; w = w->next)	368	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
233	events \|= w->events;	369	events \|= w->events;
234		370
235	anfd->reify = 0;	371	anfd->reify = 0;
236		372
237	if (anfd->events != events)
238	{
239	method_modify (fd, anfd->events, events);	373	method_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	374	anfd->events = events;
241	}
242	}	375	}
243		376
244	fdchangecnt = 0;	377	fdchangecnt = 0;
245	}	378	}
246		379
247	static void	380	static void
248	fd_change (int fd)	381	fd_change (EV_P_ int fd)
249	{	382	{
250	if (anfds [fd].reify \|\| fdchangecnt < 0)	383	if (anfds [fd].reify \|\| fdchangecnt < 0)
251	return;	384	return;
252		385
253	anfds [fd].reify = 1;	386	anfds [fd].reify = 1;
…		…
255	++fdchangecnt;	388	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
257	fdchanges [fdchangecnt - 1] = fd;	390	fdchanges [fdchangecnt - 1] = fd;
258	}	391	}
259		392
		393	static void
		394	fd_kill (EV_P_ int fd)
		395	{
		396	struct ev_io *w;
		397
		398	while ((w = (struct ev_io *)anfds [fd].head))
		399	{
		400	ev_io_stop (EV_A_ w);
		401	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		402	}
		403	}
		404
260	/* called on EBADF to verify fds */	405	/* called on EBADF to verify fds */
261	static void	406	static void
262	fd_recheck (void)	407	fd_ebadf (EV_P)
263	{	408	{
264	int fd;	409	int fd;
265		410
266	for (fd = 0; fd < anfdmax; ++fd)	411	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	412	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	413	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
269	while (anfds [fd].head)	414	fd_kill (EV_A_ fd);
		415	}
		416
		417	/* called on ENOMEM in select/poll to kill some fds and retry */
		418	static void
		419	fd_enomem (EV_P)
		420	{
		421	int fd;
		422
		423	for (fd = anfdmax; fd--; )
		424	if (anfds [fd].events)
270	{	425	{
271	ev_io_stop (anfds [fd].head);	426	fd_kill (EV_A_ fd);
272	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	427	return;
273	}	428	}
		429	}
		430
		431	/* susually called after fork if method needs to re-arm all fds from scratch */
		432	static void
		433	fd_rearm_all (EV_P)
		434	{
		435	int fd;
		436
		437	/* this should be highly optimised to not do anything but set a flag */
		438	for (fd = 0; fd < anfdmax; ++fd)
		439	if (anfds [fd].events)
		440	{
		441	anfds [fd].events = 0;
		442	fd_change (EV_A_ fd);
		443	}
274	}	444	}
275		445
276	/*****************************************************************************/	446	/*****************************************************************************/
277		447
278	static struct ev_timer **timers;
279	static int timermax, timercnt;
280
281	static struct ev_periodic **periodics;
282	static int periodicmax, periodiccnt;
283
284	static void	448	static void
285	upheap (WT *timers, int k)	449	upheap (WT *heap, int k)
286	{	450	{
287	WT w = timers [k];	451	WT w = heap [k];
288		452
289	while (k && timers [k >> 1]->at > w->at)	453	while (k && heap [k >> 1]->at > w->at)
290	{	454	{
291	timers [k] = timers [k >> 1];	455	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	456	((W)heap [k])->active = k + 1;
293	k >>= 1;	457	k >>= 1;
294	}	458	}
295		459
296	timers [k] = w;	460	heap [k] = w;
297	timers [k]->active = k + 1;	461	((W)heap [k])->active = k + 1;
298		462
299	}	463	}
300		464
301	static void	465	static void
302	downheap (WT *timers, int N, int k)	466	downheap (WT *heap, int N, int k)
303	{	467	{
304	WT w = timers [k];	468	WT w = heap [k];
305		469
306	while (k < (N >> 1))	470	while (k < (N >> 1))
307	{	471	{
308	int j = k << 1;	472	int j = k << 1;
309		473
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	474	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	475	++j;
312		476
313	if (w->at <= timers [j]->at)	477	if (w->at <= heap [j]->at)
314	break;	478	break;
315		479
316	timers [k] = timers [j];	480	heap [k] = heap [j];
317	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
318	k = j;	482	k = j;
319	}	483	}
320		484
321	timers [k] = w;	485	heap [k] = w;
322	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
323	}	487	}
324		488
325	/*****************************************************************************/	489	/*****************************************************************************/
326		490
327	typedef struct	491	typedef struct
328	{	492	{
329	struct ev_signal *head;	493	WL head;
330	sig_atomic_t volatile gotsig;	494	sig_atomic_t volatile gotsig;
331	} ANSIG;	495	} ANSIG;
332		496
333	static ANSIG *signals;	497	static ANSIG *signals;
334	static int signalmax;	498	static int signalmax;
…		…
350	}	514	}
351		515
352	static void	516	static void
353	sighandler (int signum)	517	sighandler (int signum)
354	{	518	{
		519	#if WIN32
		520	signal (signum, sighandler);
		521	#endif
		522
355	signals [signum - 1].gotsig = 1;	523	signals [signum - 1].gotsig = 1;
356		524
357	if (!gotsig)	525	if (!gotsig)
358	{	526	{
		527	int old_errno = errno;
359	gotsig = 1;	528	gotsig = 1;
360	write (sigpipe [1], &signum, 1);	529	write (sigpipe [1], &signum, 1);
		530	errno = old_errno;
361	}	531	}
362	}	532	}
363		533
364	static void	534	static void
365	sigcb (struct ev_io *iow, int revents)	535	sigcb (EV_P_ struct ev_io *iow, int revents)
366	{	536	{
367	struct ev_signal *w;	537	WL w;
368	int sig;	538	int signum;
369		539
370	read (sigpipe [0], &revents, 1);	540	read (sigpipe [0], &revents, 1);
371	gotsig = 0;	541	gotsig = 0;
372		542
373	for (sig = signalmax; sig--; )	543	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	544	if (signals [signum].gotsig)
375	{	545	{
376	signals [sig].gotsig = 0;	546	signals [signum].gotsig = 0;
377		547
378	for (w = signals [sig].head; w; w = w->next)	548	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	549	event (EV_A_ (W)w, EV_SIGNAL);
380	}	550	}
381	}	551	}
382		552
383	static void	553	static void
384	siginit (void)	554	siginit (EV_P)
385	{	555	{
		556	#ifndef WIN32
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	557	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	558	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388		559
389	/* rather than sort out wether we really need nb, set it */	560	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	561	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	562	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		563	#endif
392		564
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	565	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	566	ev_io_start (EV_A_ &sigev);
		567	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	568	}
396		569
397	/*****************************************************************************/	570	/*****************************************************************************/
398		571
399	static struct ev_idle **idles;	572	#ifndef WIN32
400	static int idlemax, idlecnt;
401
402	static struct ev_prepare **prepares;
403	static int preparemax, preparecnt;
404
405	static struct ev_check **checks;
406	static int checkmax, checkcnt;
407
408	/*****************************************************************************/
409		573
410	static struct ev_child *childs [PID_HASHSIZE];	574	static struct ev_child *childs [PID_HASHSIZE];
411	static struct ev_signal childev;	575	static struct ev_signal childev;
412		576
413	#ifndef WCONTINUED	577	#ifndef WCONTINUED
414	# define WCONTINUED 0	578	# define WCONTINUED 0
415	#endif	579	#endif
416		580
417	static void	581	static void
418	childcb (struct ev_signal *sw, int revents)	582	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
419	{	583	{
420	struct ev_child *w;	584	struct ev_child *w;
		585
		586	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		587	if (w->pid == pid \|\| !w->pid)
		588	{
		589	ev_priority (w) = ev_priority (sw); /* need to do it now */
		590	w->rpid = pid;
		591	w->rstatus = status;
		592	event (EV_A_ (W)w, EV_CHILD);
		593	}
		594	}
		595
		596	static void
		597	childcb (EV_P_ struct ev_signal *sw, int revents)
		598	{
421	int pid, status;	599	int pid, status;
422		600
423	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	601	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	602	{
425	if (w->pid == pid \|\| w->pid == -1)	603	/* make sure we are called again until all childs have been reaped */
426	{	604	event (EV_A_ (W)sw, EV_SIGNAL);
427	w->status = status;	605
428	event ((W)w, EV_CHILD);	606	child_reap (EV_A_ sw, pid, pid, status);
429	}	607	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		608	}
430	}	609	}
		610
		611	#endif
431		612
432	/*****************************************************************************/	613	/*****************************************************************************/
433		614
		615	#if EV_USE_KQUEUE
		616	# include "ev_kqueue.c"
		617	#endif
434	#if EV_USE_EPOLL	618	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	619	# include "ev_epoll.c"
436	#endif	620	#endif
		621	#if EV_USE_POLL
		622	# include "ev_poll.c"
		623	#endif
437	#if EV_USE_SELECT	624	#if EV_USE_SELECT
438	# include "ev_select.c"	625	# include "ev_select.c"
439	#endif	626	#endif
440		627
441	int	628	int
…		…
448	ev_version_minor (void)	635	ev_version_minor (void)
449	{	636	{
450	return EV_VERSION_MINOR;	637	return EV_VERSION_MINOR;
451	}	638	}
452		639
453	int ev_init (int flags)	640	/* return true if we are running with elevated privileges and should ignore env variables */
		641	static int
		642	enable_secure (void)
454	{	643	{
		644	#ifdef WIN32
		645	return 0;
		646	#else
		647	return getuid () != geteuid ()
		648	\|\| getgid () != getegid ();
		649	#endif
		650	}
		651
		652	int
		653	ev_method (EV_P)
		654	{
		655	return method;
		656	}
		657
		658	static void
		659	loop_init (EV_P_ int methods)
		660	{
455	if (!ev_method)	661	if (!method)
456	{	662	{
457	#if EV_USE_MONOTONIC	663	#if EV_USE_MONOTONIC
458	{	664	{
459	struct timespec ts;	665	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	666	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	667	have_monotonic = 1;
462	}	668	}
463	#endif	669	#endif
464		670
465	ev_now = ev_time ();	671	rt_now = ev_time ();
466	now = get_clock ();	672	mn_now = get_clock ();
		673	now_floor = mn_now;
467	diff = ev_now - now;	674	rtmn_diff = rt_now - mn_now;
468		675
469	if (pipe (sigpipe))	676	if (methods == EVMETHOD_AUTO)
470	return 0;	677	if (!enable_secure () && getenv ("LIBEV_METHODS"))
471		678	methods = atoi (getenv ("LIBEV_METHODS"));
		679	else
472	ev_method = EVMETHOD_NONE;	680	methods = EVMETHOD_ANY;
		681
		682	method = 0;
		683	#if EV_USE_WIN32
		684	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		685	#endif
		686	#if EV_USE_KQUEUE
		687	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		688	#endif
473	#if EV_USE_EPOLL	689	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	690	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		691	#endif
		692	#if EV_USE_POLL
		693	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
475	#endif	694	#endif
476	#if EV_USE_SELECT	695	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	696	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
478	#endif	697	#endif
		698	}
		699	}
479		700
		701	void
		702	loop_destroy (EV_P)
		703	{
		704	int i;
		705
		706	#if EV_USE_WIN32
		707	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		708	#endif
		709	#if EV_USE_KQUEUE
		710	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		711	#endif
		712	#if EV_USE_EPOLL
		713	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		714	#endif
		715	#if EV_USE_POLL
		716	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		717	#endif
		718	#if EV_USE_SELECT
		719	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		720	#endif
		721
		722	for (i = NUMPRI; i--; )
		723	array_free (pending, [i]);
		724
		725	array_free (fdchange, );
		726	array_free (timer, );
		727	array_free (periodic, );
		728	array_free (idle, );
		729	array_free (prepare, );
		730	array_free (check, );
		731
		732	method = 0;
		733	/TODO/
		734	}
		735
		736	void
		737	loop_fork (EV_P)
		738	{
		739	/TODO/
		740	#if EV_USE_EPOLL
		741	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		742	#endif
		743	#if EV_USE_KQUEUE
		744	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		745	#endif
		746	}
		747
		748	#if EV_MULTIPLICITY
		749	struct ev_loop *
		750	ev_loop_new (int methods)
		751	{
		752	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		753
		754	memset (loop, 0, sizeof (struct ev_loop));
		755
		756	loop_init (EV_A_ methods);
		757
		758	if (ev_method (EV_A))
		759	return loop;
		760
		761	return 0;
		762	}
		763
		764	void
		765	ev_loop_destroy (EV_P)
		766	{
		767	loop_destroy (EV_A);
		768	ev_free (loop);
		769	}
		770
		771	void
		772	ev_loop_fork (EV_P)
		773	{
		774	loop_fork (EV_A);
		775	}
		776
		777	#endif
		778
		779	#if EV_MULTIPLICITY
		780	struct ev_loop default_loop_struct;
		781	static struct ev_loop *default_loop;
		782
		783	struct ev_loop *
		784	#else
		785	static int default_loop;
		786
		787	int
		788	#endif
		789	ev_default_loop (int methods)
		790	{
		791	if (sigpipe [0] == sigpipe [1])
		792	if (pipe (sigpipe))
		793	return 0;
		794
		795	if (!default_loop)
		796	{
		797	#if EV_MULTIPLICITY
		798	struct ev_loop *loop = default_loop = &default_loop_struct;
		799	#else
		800	default_loop = 1;
		801	#endif
		802
		803	loop_init (EV_A_ methods);
		804
480	if (ev_method)	805	if (ev_method (EV_A))
481	{	806	{
482	ev_watcher_init (&sigev, sigcb);	807	ev_watcher_init (&sigev, sigcb);
		808	ev_set_priority (&sigev, EV_MAXPRI);
483	siginit ();	809	siginit (EV_A);
484		810
		811	#ifndef WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	812	ev_signal_init (&childev, childcb, SIGCHLD);
		813	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	814	ev_signal_start (EV_A_ &childev);
		815	ev_unref (EV_A); /* child watcher should not keep loop alive */
		816	#endif
487	}	817	}
		818	else
		819	default_loop = 0;
488	}	820	}
489		821
490	return ev_method;	822	return default_loop;
491	}	823	}
492		824
493	/*****************************************************************************/
494
495	void	825	void
496	ev_fork_prepare (void)	826	ev_default_destroy (void)
497	{	827	{
498	/* nop */	828	#if EV_MULTIPLICITY
499	}	829	struct ev_loop *loop = default_loop;
500
501	void
502	ev_fork_parent (void)
503	{
504	/* nop */
505	}
506
507	void
508	ev_fork_child (void)
509	{
510	#if EV_USE_EPOLL
511	if (ev_method == EVMETHOD_EPOLL)
512	epoll_postfork_child ();
513	#endif	830	#endif
514		831
		832	ev_ref (EV_A); /* child watcher */
		833	ev_signal_stop (EV_A_ &childev);
		834
		835	ev_ref (EV_A); /* signal watcher */
515	ev_io_stop (&sigev);	836	ev_io_stop (EV_A_ &sigev);
		837
		838	close (sigpipe [0]); sigpipe [0] = 0;
		839	close (sigpipe [1]); sigpipe [1] = 0;
		840
		841	loop_destroy (EV_A);
		842	}
		843
		844	void
		845	ev_default_fork (void)
		846	{
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *loop = default_loop;
		849	#endif
		850
		851	loop_fork (EV_A);
		852
		853	ev_io_stop (EV_A_ &sigev);
516	close (sigpipe [0]);	854	close (sigpipe [0]);
517	close (sigpipe [1]);	855	close (sigpipe [1]);
518	pipe (sigpipe);	856	pipe (sigpipe);
		857
		858	ev_ref (EV_A); /* signal watcher */
519	siginit ();	859	siginit (EV_A);
520	}	860	}
521		861
522	/*****************************************************************************/	862	/*****************************************************************************/
523		863
524	static void	864	static void
525	call_pending (void)	865	call_pending (EV_P)
526	{	866	{
		867	int pri;
		868
		869	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	870	while (pendingcnt [pri])
528	{	871	{
529	ANPENDING *p = pendings + --pendingcnt;	872	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		873
531	if (p->w)	874	if (p->w)
532	{	875	{
533	p->w->pending = 0;	876	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	877	p->w->cb (EV_A_ p->w, p->events);
535	}	878	}
536	}	879	}
537	}	880	}
538		881
539	static void	882	static void
540	timers_reify (void)	883	timers_reify (EV_P)
541	{	884	{
542	while (timercnt && timers [0]->at <= now)	885	while (timercnt && ((WT)timers [0])->at <= mn_now)
543	{	886	{
544	struct ev_timer *w = timers [0];	887	struct ev_timer *w = timers [0];
		888
		889	assert (("inactive timer on timer heap detected", ev_is_active (w)));
545		890
546	/* first reschedule or stop timer */	891	/* first reschedule or stop timer */
547	if (w->repeat)	892	if (w->repeat)
548	{	893	{
549	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	894	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
550	w->at = now + w->repeat;	895	((WT)w)->at = mn_now + w->repeat;
551	downheap ((WT *)timers, timercnt, 0);	896	downheap ((WT *)timers, timercnt, 0);
552	}	897	}
553	else	898	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	899	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		900
556	event ((W)w, EV_TIMEOUT);	901	event (EV_A_ (W)w, EV_TIMEOUT);
557	}	902	}
558	}	903	}
559		904
560	static void	905	static void
561	periodics_reify (void)	906	periodics_reify (EV_P)
562	{	907	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	908	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
564	{	909	{
565	struct ev_periodic *w = periodics [0];	910	struct ev_periodic *w = periodics [0];
		911
		912	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
566		913
567	/* first reschedule or stop timer */	914	/* first reschedule or stop timer */
568	if (w->interval)	915	if (w->interval)
569	{	916	{
570	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	917	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
571	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	918	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
572	downheap ((WT *)periodics, periodiccnt, 0);	919	downheap ((WT *)periodics, periodiccnt, 0);
573	}	920	}
574	else	921	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	922	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		923
577	event ((W)w, EV_PERIODIC);	924	event (EV_A_ (W)w, EV_PERIODIC);
578	}	925	}
579	}	926	}
580		927
581	static void	928	static void
582	periodics_reschedule (ev_tstamp diff)	929	periodics_reschedule (EV_P)
583	{	930	{
584	int i;	931	int i;
585		932
586	/* adjust periodics after time jump */	933	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	934	for (i = 0; i < periodiccnt; ++i)
588	{	935	{
589	struct ev_periodic *w = periodics [i];	936	struct ev_periodic *w = periodics [i];
590		937
591	if (w->interval)	938	if (w->interval)
592	{	939	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	940	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
594		941
595	if (fabs (diff) >= 1e-4)	942	if (fabs (diff) >= 1e-4)
596	{	943	{
597	ev_periodic_stop (w);	944	ev_periodic_stop (EV_A_ w);
598	ev_periodic_start (w);	945	ev_periodic_start (EV_A_ w);
599		946
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	947	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	948	}
602	}	949	}
603	}	950	}
604	}	951	}
605		952
		953	inline int
		954	time_update_monotonic (EV_P)
		955	{
		956	mn_now = get_clock ();
		957
		958	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		959	{
		960	rt_now = rtmn_diff + mn_now;
		961	return 0;
		962	}
		963	else
		964	{
		965	now_floor = mn_now;
		966	rt_now = ev_time ();
		967	return 1;
		968	}
		969	}
		970
606	static void	971	static void
607	time_update (void)	972	time_update (EV_P)
608	{	973	{
609	int i;	974	int i;
610		975
611	ev_now = ev_time ();	976	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	977	if (expect_true (have_monotonic))
614	{	978	{
615	ev_tstamp odiff = diff;	979	if (time_update_monotonic (EV_A))
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	980	{
619	now = get_clock ();	981	ev_tstamp odiff = rtmn_diff;
		982
		983	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		984	{
620	diff = ev_now - now;	985	rtmn_diff = rt_now - mn_now;
621		986
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	987	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	988	return; /* all is well */
624		989
625	ev_now = ev_time ();	990	rt_now = ev_time ();
		991	mn_now = get_clock ();
		992	now_floor = mn_now;
		993	}
		994
		995	periodics_reschedule (EV_A);
		996	/* no timer adjustment, as the monotonic clock doesn't jump */
		997	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
626	}	998	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}	999	}
631	else	1000	else
		1001	#endif
632	{	1002	{
633	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1003	rt_now = ev_time ();
		1004
		1005	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
634	{	1006	{
635	periodics_reschedule (ev_now - now);	1007	periodics_reschedule (EV_A);
636		1008
637	/* adjust timers. this is easy, as the offset is the same for all */	1009	/* adjust timers. this is easy, as the offset is the same for all */
638	for (i = 0; i < timercnt; ++i)	1010	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	1011	((WT)timers [i])->at += rt_now - mn_now;
640	}	1012	}
641		1013
642	now = ev_now;	1014	mn_now = rt_now;
643	}	1015	}
644	}	1016	}
645		1017
646	int ev_loop_done;	1018	void
		1019	ev_ref (EV_P)
		1020	{
		1021	++activecnt;
		1022	}
647		1023
		1024	void
		1025	ev_unref (EV_P)
		1026	{
		1027	--activecnt;
		1028	}
		1029
		1030	static int loop_done;
		1031
		1032	void
648	void ev_loop (int flags)	1033	ev_loop (EV_P_ int flags)
649	{	1034	{
650	double block;	1035	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1036	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
652		1037
653	do	1038	do
654	{	1039	{
655	/* queue check watchers (and execute them) */	1040	/* queue check watchers (and execute them) */
656	if (preparecnt)	1041	if (expect_false (preparecnt))
657	{	1042	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1043	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	1044	call_pending (EV_A);
660	}	1045	}
661		1046
662	/* update fd-related kernel structures */	1047	/* update fd-related kernel structures */
663	fd_reify ();	1048	fd_reify (EV_A);
664		1049
665	/* calculate blocking time */	1050	/* calculate blocking time */
666		1051
667	/* we only need this for !monotonic clockor timers, but as we basically	1052	/* we only need this for !monotonic clockor timers, but as we basically
668	always have timers, we just calculate it always */	1053	always have timers, we just calculate it always */
		1054	#if EV_USE_MONOTONIC
		1055	if (expect_true (have_monotonic))
		1056	time_update_monotonic (EV_A);
		1057	else
		1058	#endif
		1059	{
669	ev_now = ev_time ();	1060	rt_now = ev_time ();
		1061	mn_now = rt_now;
		1062	}
670		1063
671	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1064	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
672	block = 0.;	1065	block = 0.;
673	else	1066	else
674	{	1067	{
675	block = MAX_BLOCKTIME;	1068	block = MAX_BLOCKTIME;
676		1069
677	if (timercnt)	1070	if (timercnt)
678	{	1071	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1072	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
680	if (block > to) block = to;	1073	if (block > to) block = to;
681	}	1074	}
682		1075
683	if (periodiccnt)	1076	if (periodiccnt)
684	{	1077	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1078	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
686	if (block > to) block = to;	1079	if (block > to) block = to;
687	}	1080	}
688		1081
689	if (block < 0.) block = 0.;	1082	if (block < 0.) block = 0.;
690	}	1083	}
691		1084
692	method_poll (block);	1085	method_poll (EV_A_ block);
693		1086
694	/* update ev_now, do magic */	1087	/* update rt_now, do magic */
695	time_update ();	1088	time_update (EV_A);
696		1089
697	/* queue pending timers and reschedule them */	1090	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	1091	timers_reify (EV_A); /* relative timers called last */
699	periodics_reify (); /* absolute timers called first */	1092	periodics_reify (EV_A); /* absolute timers called first */
700		1093
701	/* queue idle watchers unless io or timers are pending */	1094	/* queue idle watchers unless io or timers are pending */
702	if (!pendingcnt)	1095	if (!pendingcnt)
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	1096	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		1097
705	/* queue check watchers, to be executed first */	1098	/* queue check watchers, to be executed first */
706	if (checkcnt)	1099	if (checkcnt)
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	1100	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		1101
709	call_pending ();	1102	call_pending (EV_A);
710	}	1103	}
711	while (!ev_loop_done);	1104	while (activecnt && !loop_done);
712		1105
713	if (ev_loop_done != 2)	1106	if (loop_done != 2)
714	ev_loop_done = 0;	1107	loop_done = 0;
		1108	}
		1109
		1110	void
		1111	ev_unloop (EV_P_ int how)
		1112	{
		1113	loop_done = how;
715	}	1114	}
716		1115
717	/*****************************************************************************/	1116	/*****************************************************************************/
718		1117
719	static void	1118	inline void
720	wlist_add (WL *head, WL elem)	1119	wlist_add (WL *head, WL elem)
721	{	1120	{
722	elem->next = *head;	1121	elem->next = *head;
723	*head = elem;	1122	*head = elem;
724	}	1123	}
725		1124
726	static void	1125	inline void
727	wlist_del (WL *head, WL elem)	1126	wlist_del (WL *head, WL elem)
728	{	1127	{
729	while (*head)	1128	while (*head)
730	{	1129	{
731	if (*head == elem)	1130	if (*head == elem)
…		…
736		1135
737	head = &(*head)->next;	1136	head = &(*head)->next;
738	}	1137	}
739	}	1138	}
740		1139
741	static void	1140	inline void
742	ev_clear_pending (W w)	1141	ev_clear_pending (EV_P_ W w)
743	{	1142	{
744	if (w->pending)	1143	if (w->pending)
745	{	1144	{
746	pendings [w->pending - 1].w = 0;	1145	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1146	w->pending = 0;
748	}	1147	}
749	}	1148	}
750		1149
751	static void	1150	inline void
752	ev_start (W w, int active)	1151	ev_start (EV_P_ W w, int active)
753	{	1152	{
		1153	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1154	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1155
754	w->active = active;	1156	w->active = active;
		1157	ev_ref (EV_A);
755	}	1158	}
756		1159
757	static void	1160	inline void
758	ev_stop (W w)	1161	ev_stop (EV_P_ W w)
759	{	1162	{
		1163	ev_unref (EV_A);
760	w->active = 0;	1164	w->active = 0;
761	}	1165	}
762		1166
763	/*****************************************************************************/	1167	/*****************************************************************************/
764		1168
765	void	1169	void
766	ev_io_start (struct ev_io *w)	1170	ev_io_start (EV_P_ struct ev_io *w)
767	{	1171	{
		1172	int fd = w->fd;
		1173
768	if (ev_is_active (w))	1174	if (ev_is_active (w))
769	return;	1175	return;
770		1176
771	int fd = w->fd;
772
773	assert (("ev_io_start called with negative fd", fd >= 0));	1177	assert (("ev_io_start called with negative fd", fd >= 0));
774		1178
775	ev_start ((W)w, 1);	1179	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1180	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1181	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1182
779	fd_change (fd);	1183	fd_change (EV_A_ fd);
780	}	1184	}
781		1185
782	void	1186	void
783	ev_io_stop (struct ev_io *w)	1187	ev_io_stop (EV_P_ struct ev_io *w)
784	{	1188	{
785	ev_clear_pending ((W)w);	1189	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1190	if (!ev_is_active (w))
787	return;	1191	return;
788		1192
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1193	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1194	ev_stop (EV_A_ (W)w);
791		1195
792	fd_change (w->fd);	1196	fd_change (EV_A_ w->fd);
793	}	1197	}
794		1198
795	void	1199	void
796	ev_timer_start (struct ev_timer *w)	1200	ev_timer_start (EV_P_ struct ev_timer *w)
797	{	1201	{
798	if (ev_is_active (w))	1202	if (ev_is_active (w))
799	return;	1203	return;
800		1204
801	w->at += now;	1205	((WT)w)->at += mn_now;
802		1206
803	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1207	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
804		1208
805	ev_start ((W)w, ++timercnt);	1209	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1210	array_needsize (timers, timermax, timercnt, );
807	timers [timercnt - 1] = w;	1211	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1212	upheap ((WT *)timers, timercnt - 1);
809	}
810		1213
		1214	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1215	}
		1216
811	void	1217	void
812	ev_timer_stop (struct ev_timer *w)	1218	ev_timer_stop (EV_P_ struct ev_timer *w)
813	{	1219	{
814	ev_clear_pending ((W)w);	1220	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1221	if (!ev_is_active (w))
816	return;	1222	return;
817		1223
		1224	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1225
818	if (w->active < timercnt--)	1226	if (((W)w)->active < timercnt--)
819	{	1227	{
820	timers [w->active - 1] = timers [timercnt];	1228	timers [((W)w)->active - 1] = timers [timercnt];
821	downheap ((WT *)timers, timercnt, w->active - 1);	1229	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
822	}	1230	}
823		1231
824	w->at = w->repeat;	1232	((WT)w)->at = w->repeat;
825		1233
826	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
827	}	1235	}
828		1236
829	void	1237	void
830	ev_timer_again (struct ev_timer *w)	1238	ev_timer_again (EV_P_ struct ev_timer *w)
831	{	1239	{
832	if (ev_is_active (w))	1240	if (ev_is_active (w))
833	{	1241	{
834	if (w->repeat)	1242	if (w->repeat)
835	{	1243	{
836	w->at = now + w->repeat;	1244	((WT)w)->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
838	}	1246	}
839	else	1247	else
840	ev_timer_stop (w);	1248	ev_timer_stop (EV_A_ w);
841	}	1249	}
842	else if (w->repeat)	1250	else if (w->repeat)
843	ev_timer_start (w);	1251	ev_timer_start (EV_A_ w);
844	}	1252	}
845		1253
846	void	1254	void
847	ev_periodic_start (struct ev_periodic *w)	1255	ev_periodic_start (EV_P_ struct ev_periodic *w)
848	{	1256	{
849	if (ev_is_active (w))	1257	if (ev_is_active (w))
850	return;	1258	return;
851		1259
852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1260	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
853		1261
854	/* this formula differs from the one in periodic_reify because we do not always round up */	1262	/* this formula differs from the one in periodic_reify because we do not always round up */
855	if (w->interval)	1263	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1264	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
857		1265
858	ev_start ((W)w, ++periodiccnt);	1266	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1267	array_needsize (periodics, periodicmax, periodiccnt, );
860	periodics [periodiccnt - 1] = w;	1268	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1269	upheap ((WT *)periodics, periodiccnt - 1);
862	}
863		1270
		1271	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1272	}
		1273
864	void	1274	void
865	ev_periodic_stop (struct ev_periodic *w)	1275	ev_periodic_stop (EV_P_ struct ev_periodic *w)
866	{	1276	{
867	ev_clear_pending ((W)w);	1277	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1278	if (!ev_is_active (w))
869	return;	1279	return;
870		1280
		1281	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1282
871	if (w->active < periodiccnt--)	1283	if (((W)w)->active < periodiccnt--)
872	{	1284	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1285	periodics [((W)w)->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1286	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
875	}	1287	}
876		1288
877	ev_stop ((W)w);	1289	ev_stop (EV_A_ (W)w);
878	}	1290	}
879		1291
880	void	1292	void
881	ev_signal_start (struct ev_signal *w)	1293	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1294	{
883	if (ev_is_active (w))	1295	if (ev_is_active (w))
884	return;	1296	return;
885		1297
		1298	ev_start (EV_A_ (W)w, ++idlecnt);
		1299	array_needsize (idles, idlemax, idlecnt, );
		1300	idles [idlecnt - 1] = w;
		1301	}
		1302
		1303	void
		1304	ev_idle_stop (EV_P_ struct ev_idle *w)
		1305	{
		1306	ev_clear_pending (EV_A_ (W)w);
		1307	if (ev_is_active (w))
		1308	return;
		1309
		1310	idles [((W)w)->active - 1] = idles [--idlecnt];
		1311	ev_stop (EV_A_ (W)w);
		1312	}
		1313
		1314	void
		1315	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1316	{
		1317	if (ev_is_active (w))
		1318	return;
		1319
		1320	ev_start (EV_A_ (W)w, ++preparecnt);
		1321	array_needsize (prepares, preparemax, preparecnt, );
		1322	prepares [preparecnt - 1] = w;
		1323	}
		1324
		1325	void
		1326	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1327	{
		1328	ev_clear_pending (EV_A_ (W)w);
		1329	if (ev_is_active (w))
		1330	return;
		1331
		1332	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1333	ev_stop (EV_A_ (W)w);
		1334	}
		1335
		1336	void
		1337	ev_check_start (EV_P_ struct ev_check *w)
		1338	{
		1339	if (ev_is_active (w))
		1340	return;
		1341
		1342	ev_start (EV_A_ (W)w, ++checkcnt);
		1343	array_needsize (checks, checkmax, checkcnt, );
		1344	checks [checkcnt - 1] = w;
		1345	}
		1346
		1347	void
		1348	ev_check_stop (EV_P_ struct ev_check *w)
		1349	{
		1350	ev_clear_pending (EV_A_ (W)w);
		1351	if (ev_is_active (w))
		1352	return;
		1353
		1354	checks [((W)w)->active - 1] = checks [--checkcnt];
		1355	ev_stop (EV_A_ (W)w);
		1356	}
		1357
		1358	#ifndef SA_RESTART
		1359	# define SA_RESTART 0
		1360	#endif
		1361
		1362	void
		1363	ev_signal_start (EV_P_ struct ev_signal *w)
		1364	{
		1365	#if EV_MULTIPLICITY
		1366	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1367	#endif
		1368	if (ev_is_active (w))
		1369	return;
		1370
886	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1371	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
887		1372
888	ev_start ((W)w, 1);	1373	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1374	array_needsize (signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1375	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1376
892	if (!w->next)	1377	if (!((WL)w)->next)
893	{	1378	{
		1379	#if WIN32
		1380	signal (w->signum, sighandler);
		1381	#else
894	struct sigaction sa;	1382	struct sigaction sa;
895	sa.sa_handler = sighandler;	1383	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1384	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1385	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1386	sigaction (w->signum, &sa, 0);
		1387	#endif
899	}	1388	}
900	}	1389	}
901		1390
902	void	1391	void
903	ev_signal_stop (struct ev_signal *w)	1392	ev_signal_stop (EV_P_ struct ev_signal *w)
904	{	1393	{
905	ev_clear_pending ((W)w);	1394	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1395	if (!ev_is_active (w))
907	return;	1396	return;
908		1397
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1398	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1399	ev_stop (EV_A_ (W)w);
911		1400
912	if (!signals [w->signum - 1].head)	1401	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1402	signal (w->signum, SIG_DFL);
914	}	1403	}
915		1404
916	void	1405	void
917	ev_idle_start (struct ev_idle *w)	1406	ev_child_start (EV_P_ struct ev_child *w)
918	{	1407	{
		1408	#if EV_MULTIPLICITY
		1409	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1410	#endif
919	if (ev_is_active (w))	1411	if (ev_is_active (w))
920	return;	1412	return;
921		1413
922	ev_start ((W)w, ++idlecnt);	1414	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	1415	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	1416	}
926		1417
927	void	1418	void
928	ev_idle_stop (struct ev_idle *w)	1419	ev_child_stop (EV_P_ struct ev_child *w)
929	{	1420	{
930	ev_clear_pending ((W)w);	1421	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1422	if (ev_is_active (w))
932	return;	1423	return;
933		1424
934	idles [w->active - 1] = idles [--idlecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_prepare_start (struct ev_prepare *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++preparecnt);
945	array_needsize (prepares, preparemax, preparecnt, );
946	prepares [preparecnt - 1] = w;
947	}
948
949	void
950	ev_prepare_stop (struct ev_prepare *w)
951	{
952	ev_clear_pending ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	prepares [w->active - 1] = prepares [--preparecnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_check_start (struct ev_check *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, ++checkcnt);
967	array_needsize (checks, checkmax, checkcnt, );
968	checks [checkcnt - 1] = w;
969	}
970
971	void
972	ev_check_stop (struct ev_check *w)
973	{
974	ev_clear_pending ((W)w);
975	if (ev_is_active (w))
976	return;
977
978	checks [w->active - 1] = checks [--checkcnt];
979	ev_stop ((W)w);
980	}
981
982	void
983	ev_child_start (struct ev_child *w)
984	{
985	if (ev_is_active (w))
986	return;
987
988	ev_start ((W)w, 1);
989	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	}
991
992	void
993	ev_child_stop (struct ev_child *w)
994	{
995	ev_clear_pending ((W)w);
996	if (ev_is_active (w))
997	return;
998
999	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1425	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1426	ev_stop (EV_A_ (W)w);
1001	}	1427	}
1002		1428
1003	/*****************************************************************************/	1429	/*****************************************************************************/
1004		1430
1005	struct ev_once	1431	struct ev_once
…		…
1009	void (cb)(int revents, void arg);	1435	void (cb)(int revents, void arg);
1010	void *arg;	1436	void *arg;
1011	};	1437	};
1012		1438
1013	static void	1439	static void
1014	once_cb (struct ev_once *once, int revents)	1440	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1441	{
1016	void (cb)(int revents, void arg) = once->cb;	1442	void (cb)(int revents, void arg) = once->cb;
1017	void *arg = once->arg;	1443	void *arg = once->arg;
1018		1444
1019	ev_io_stop (&once->io);	1445	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1446	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1447	ev_free (once);
1022		1448
1023	cb (revents, arg);	1449	cb (revents, arg);
1024	}	1450	}
1025		1451
1026	static void	1452	static void
1027	once_cb_io (struct ev_io *w, int revents)	1453	once_cb_io (EV_P_ struct ev_io *w, int revents)
1028	{	1454	{
1029	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1455	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1030	}	1456	}
1031		1457
1032	static void	1458	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1459	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1034	{	1460	{
1035	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1461	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1036	}	1462	}
1037		1463
1038	void	1464	void
1039	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1465	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1040	{	1466	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1467	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1042		1468
1043	if (!once)	1469	if (!once)
1044	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1470	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1045	else	1471	else
1046	{	1472	{
…		…
1049		1475
1050	ev_watcher_init (&once->io, once_cb_io);	1476	ev_watcher_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1477	if (fd >= 0)
1052	{	1478	{
1053	ev_io_set (&once->io, fd, events);	1479	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1480	ev_io_start (EV_A_ &once->io);
1055	}	1481	}
1056		1482
1057	ev_watcher_init (&once->to, once_cb_to);	1483	ev_watcher_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1484	if (timeout >= 0.)
1059	{	1485	{
1060	ev_timer_set (&once->to, timeout, 0.);	1486	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1487	ev_timer_start (EV_A_ &once->to);
1062	}	1488	}
1063	}	1489	}
1064	}	1490	}
1065		1491
1066	/*****************************************************************************/
1067
1068	#if 0
1069
1070	struct ev_io wio;
1071
1072	static void
1073	sin_cb (struct ev_io *w, int revents)
1074	{
1075	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1076	}
1077
1078	static void
1079	ocb (struct ev_timer *w, int revents)
1080	{
1081	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1082	ev_timer_stop (w);
1083	ev_timer_start (w);
1084	}
1085
1086	static void
1087	scb (struct ev_signal *w, int revents)
1088	{
1089	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1090	ev_io_stop (&wio);
1091	ev_io_start (&wio);
1092	}
1093
1094	static void
1095	gcb (struct ev_signal *w, int revents)
1096	{
1097	fprintf (stderr, "generic %x\n", revents);
1098
1099	}
1100
1101	int main (void)
1102	{
1103	ev_init (0);
1104
1105	ev_io_init (&wio, sin_cb, 0, EV_READ);
1106	ev_io_start (&wio);
1107
1108	struct ev_timer t[10000];
1109
1110	#if 0
1111	int i;
1112	for (i = 0; i < 10000; ++i)
1113	{
1114	struct ev_timer *w = t + i;
1115	ev_watcher_init (w, ocb, i);
1116	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1117	ev_timer_start (w);
1118	if (drand48 () < 0.5)
1119	ev_timer_stop (w);
1120	}
1121	#endif
1122
1123	struct ev_timer t1;
1124	ev_timer_init (&t1, ocb, 5, 10);
1125	ev_timer_start (&t1);
1126
1127	struct ev_signal sig;
1128	ev_signal_init (&sig, scb, SIGQUIT);
1129	ev_signal_start (&sig);
1130
1131	struct ev_check cw;
1132	ev_check_init (&cw, gcb);
1133	ev_check_start (&cw);
1134
1135	struct ev_idle iw;
1136	ev_idle_init (&iw, gcb);
1137	ev_idle_start (&iw);
1138
1139	ev_loop (0);
1140
1141	return 0;
1142	}
1143
1144	#endif
1145
1146
1147
1148

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Comparing libev/ev.c (file contents): Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs. Revision 1.69 by root, Tue Nov 6 00:10:04 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs.
Revision 1.69 by root, Tue Nov 6 00:10:04 2007 UTC