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

Comparing libev/ev.c (file contents):
Revision 1.39 by root, Thu Nov 1 17:17:32 2007 UTC vs.
Revision 1.73 by root, Tue Nov 6 16:27:10 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>
		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
		76	/**/
50		77
51	#ifndef EV_USE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
53	#endif	80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		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
		106	#endif
		107
		108	#ifndef EV_USE_REALTIME
		109	# define EV_USE_REALTIME 1
		110	#endif
		111
		112	/**/
54		113
55	#ifndef CLOCK_MONOTONIC	114	#ifndef CLOCK_MONOTONIC
56	# undef EV_USE_MONOTONIC	115	# undef EV_USE_MONOTONIC
57	# define EV_USE_MONOTONIC 0	116	# define EV_USE_MONOTONIC 0
58	#endif	117	#endif
59		118
60	#ifndef EV_USE_SELECT
61	# define EV_USE_SELECT 1
62	#endif
63
64	#ifndef EV_USE_EPOLL
65	# define EV_USE_EPOLL 0
66	#endif
67
68	#ifndef CLOCK_REALTIME	119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
69	# define EV_USE_REALTIME 0	121	# define EV_USE_REALTIME 0
70	#endif	122	#endif
71	#ifndef EV_USE_REALTIME	123
72	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	124	/**/
73	#endif
74		125
75	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
76	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
77	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
78	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	129	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
79		130
80	#include "ev.h"	131	#include "ev.h"
		132
		133	#if __GNUC__ >= 3
		134	# define expect(expr,value) __builtin_expect ((expr),(value))
		135	# define inline inline
		136	#else
		137	# define expect(expr,value) (expr)
		138	# define inline static
		139	#endif
		140
		141	#define expect_false(expr) expect ((expr) != 0, 0)
		142	#define expect_true(expr) expect ((expr) != 0, 1)
		143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
81		146
82	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
83	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
84	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
85		150
86	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
87	ev_tstamp ev_now;
88	int ev_method;
89		152
90	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
91
92	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
93	static void (*method_modify)(int fd, int oev, int nev);
94	static void (*method_poll)(ev_tstamp timeout);
95		154
96	/*****************************************************************************/	155	/*****************************************************************************/
97		156
98	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
99	ev_time (void)	239	ev_time (void)
100	{	240	{
101	#if EV_USE_REALTIME	241	#if EV_USE_REALTIME
102	struct timespec ts;	242	struct timespec ts;
103	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
…		…
107	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
108	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
109	#endif	249	#endif
110	}	250	}
111		251
112	static ev_tstamp	252	inline ev_tstamp
113	get_clock (void)	253	get_clock (void)
114	{	254	{
115	#if EV_USE_MONOTONIC	255	#if EV_USE_MONOTONIC
116	if (have_monotonic)	256	if (expect_true (have_monotonic))
117	{	257	{
118	struct timespec ts;	258	struct timespec ts;
119	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
120	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
121	}	261	}
122	#endif	262	#endif
123		263
124	return ev_time ();	264	return ev_time ();
125	}	265	}
126		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
127	#define array_roundsize(base,n) ((n) \| 4 & ~3)	273	#define array_roundsize(base,n) ((n) \| 4 & ~3)
128		274
129	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(base,cur,cnt,init) \
130	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
131	{ \	277	{ \
132	int newcnt = cur; \	278	int newcnt = cur; \
133	do \	279	do \
134	{ \	280	{ \
135	newcnt = array_roundsize (base, newcnt << 1); \	281	newcnt = array_roundsize (base, newcnt << 1); \
136	} \	282	} \
137	while ((cnt) > newcnt); \	283	while ((cnt) > newcnt); \
138	\	284	\
139	base = realloc (base, sizeof (base) (newcnt)); \	285	base = ev_realloc (base, sizeof (base) (newcnt)); \
140	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
141	cur = newcnt; \	287	cur = newcnt; \
142	}	288	}
		289
		290	#define array_slim(stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = ev_realloc (base, sizeof (base) (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;
143		305
144	/*****************************************************************************/	306	/*****************************************************************************/
145
146	typedef struct
147	{
148	struct ev_io *head;
149	unsigned char events;
150	unsigned char reify;
151	} ANFD;
152
153	static ANFD *anfds;
154	static int anfdmax;
155		307
156	static void	308	static void
157	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
158	{	310	{
159	while (count--)	311	while (count--)
…		…
164		316
165	++base;	317	++base;
166	}	318	}
167	}	319	}
168		320
169	typedef struct
170	{
171	W w;
172	int events;
173	} ANPENDING;
174
175	static ANPENDING *pendings;
176	static int pendingmax, pendingcnt;
177
178	static void	321	static void
179	event (W w, int events)	322	event (EV_P_ W w, int events)
180	{	323	{
181	if (w->pending)	324	if (w->pending)
182	{	325	{
183	pendings [w->pending - 1].events \|= events;	326	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
184	return;	327	return;
185	}	328	}
186		329
187	w->pending = ++pendingcnt;	330	w->pending = ++pendingcnt [ABSPRI (w)];
188	array_needsize (pendings, pendingmax, pendingcnt, );	331	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
189	pendings [pendingcnt - 1].w = w;	332	pendings [ABSPRI (w)][w->pending - 1].w = w;
190	pendings [pendingcnt - 1].events = events;	333	pendings [ABSPRI (w)][w->pending - 1].events = events;
191	}	334	}
192		335
193	static void	336	static void
194	queue_events (W *events, int eventcnt, int type)	337	queue_events (EV_P_ W *events, int eventcnt, int type)
195	{	338	{
196	int i;	339	int i;
197		340
198	for (i = 0; i < eventcnt; ++i)	341	for (i = 0; i < eventcnt; ++i)
199	event (events [i], type);	342	event (EV_A_ events [i], type);
200	}	343	}
201		344
202	static void	345	static void
203	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
204	{	347	{
205	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
206	struct ev_io *w;	349	struct ev_io *w;
207		350
208	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
209	{	352	{
210	int ev = w->events & events;	353	int ev = w->events & events;
211		354
212	if (ev)	355	if (ev)
213	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
214	}	357	}
215	}	358	}
216		359
217	/*****************************************************************************/	360	/*****************************************************************************/
218		361
219	static int *fdchanges;
220	static int fdchangemax, fdchangecnt;
221
222	static void	362	static void
223	fd_reify (void)	363	fd_reify (EV_P)
224	{	364	{
225	int i;	365	int i;
226		366
227	for (i = 0; i < fdchangecnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
228	{	368	{
…		…
230	ANFD *anfd = anfds + fd;	370	ANFD *anfd = anfds + fd;
231	struct ev_io *w;	371	struct ev_io *w;
232		372
233	int events = 0;	373	int events = 0;
234		374
235	for (w = anfd->head; w; w = w->next)	375	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
236	events \|= w->events;	376	events \|= w->events;
237		377
238	anfd->reify = 0;	378	anfd->reify = 0;
239		379
240	if (anfd->events != events)
241	{
242	method_modify (fd, anfd->events, events);	380	method_modify (EV_A_ fd, anfd->events, events);
243	anfd->events = events;	381	anfd->events = events;
244	}
245	}	382	}
246		383
247	fdchangecnt = 0;	384	fdchangecnt = 0;
248	}	385	}
249		386
250	static void	387	static void
251	fd_change (int fd)	388	fd_change (EV_P_ int fd)
252	{	389	{
253	if (anfds [fd].reify \|\| fdchangecnt < 0)	390	if (anfds [fd].reify)
254	return;	391	return;
255		392
256	anfds [fd].reify = 1;	393	anfds [fd].reify = 1;
257		394
258	++fdchangecnt;	395	++fdchangecnt;
259	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	396	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
260	fdchanges [fdchangecnt - 1] = fd;	397	fdchanges [fdchangecnt - 1] = fd;
261	}	398	}
262		399
		400	static void
		401	fd_kill (EV_P_ int fd)
		402	{
		403	struct ev_io *w;
		404
		405	while ((w = (struct ev_io *)anfds [fd].head))
		406	{
		407	ev_io_stop (EV_A_ w);
		408	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		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
		420	}
		421
263	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
264	static void	423	static void
265	fd_recheck (void)	424	fd_ebadf (EV_P)
266	{	425	{
267	int fd;	426	int fd;
268		427
269	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
270	if (anfds [fd].events)	429	if (anfds [fd].events)
271	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
272	while (anfds [fd].head)	431	fd_kill (EV_A_ fd);
		432	}
		433
		434	/* called on ENOMEM in select/poll to kill some fds and retry */
		435	static void
		436	fd_enomem (EV_P)
		437	{
		438	int fd;
		439
		440	for (fd = anfdmax; fd--; )
		441	if (anfds [fd].events)
273	{	442	{
274	ev_io_stop (anfds [fd].head);	443	fd_kill (EV_A_ fd);
275	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	444	return;
276	}	445	}
		446	}
		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	}
277	}	461	}
278		462
279	/*****************************************************************************/	463	/*****************************************************************************/
280		464
281	static struct ev_timer **timers;
282	static int timermax, timercnt;
283
284	static struct ev_periodic **periodics;
285	static int periodicmax, periodiccnt;
286
287	static void	465	static void
288	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
289	{	467	{
290	WT w = timers [k];	468	WT w = heap [k];
291		469
292	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
293	{	471	{
294	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
295	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
296	k >>= 1;	474	k >>= 1;
297	}	475	}
298		476
299	timers [k] = w;	477	heap [k] = w;
300	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
301		479
302	}	480	}
303		481
304	static void	482	static void
305	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
306	{	484	{
307	WT w = timers [k];	485	WT w = heap [k];
308		486
309	while (k < (N >> 1))	487	while (k < (N >> 1))
310	{	488	{
311	int j = k << 1;	489	int j = k << 1;
312		490
313	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
314	++j;	492	++j;
315		493
316	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
317	break;	495	break;
318		496
319	timers [k] = timers [j];	497	heap [k] = heap [j];
320	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
321	k = j;	499	k = j;
322	}	500	}
323		501
324	timers [k] = w;	502	heap [k] = w;
325	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
326	}	504	}
327		505
328	/*****************************************************************************/	506	/*****************************************************************************/
329		507
330	typedef struct	508	typedef struct
331	{	509	{
332	struct ev_signal *head;	510	WL head;
333	sig_atomic_t volatile gotsig;	511	sig_atomic_t volatile gotsig;
334	} ANSIG;	512	} ANSIG;
335		513
336	static ANSIG *signals;	514	static ANSIG *signals;
337	static int signalmax;	515	static int signalmax;
…		…
353	}	531	}
354		532
355	static void	533	static void
356	sighandler (int signum)	534	sighandler (int signum)
357	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
358	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
359		541
360	if (!gotsig)	542	if (!gotsig)
361	{	543	{
		544	int old_errno = errno;
362	gotsig = 1;	545	gotsig = 1;
363	write (sigpipe [1], &signum, 1);	546	write (sigpipe [1], &signum, 1);
		547	errno = old_errno;
364	}	548	}
365	}	549	}
366		550
367	static void	551	static void
368	sigcb (struct ev_io *iow, int revents)	552	sigcb (EV_P_ struct ev_io *iow, int revents)
369	{	553	{
370	struct ev_signal *w;	554	WL w;
371	int signum;	555	int signum;
372		556
373	read (sigpipe [0], &revents, 1);	557	read (sigpipe [0], &revents, 1);
374	gotsig = 0;	558	gotsig = 0;
375		559
…		…
377	if (signals [signum].gotsig)	561	if (signals [signum].gotsig)
378	{	562	{
379	signals [signum].gotsig = 0;	563	signals [signum].gotsig = 0;
380		564
381	for (w = signals [signum].head; w; w = w->next)	565	for (w = signals [signum].head; w; w = w->next)
382	event ((W)w, EV_SIGNAL);	566	event (EV_A_ (W)w, EV_SIGNAL);
383	}	567	}
384	}	568	}
385		569
386	static void	570	static void
387	siginit (void)	571	siginit (EV_P)
388	{	572	{
		573	#ifndef WIN32
389	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	574	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	575	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391		576
392	/* rather than sort out wether we really need nb, set it */	577	/* rather than sort out wether we really need nb, set it */
393	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	578	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	579	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		580	#endif
395		581
396	ev_io_set (&sigev, sigpipe [0], EV_READ);	582	ev_io_set (&sigev, sigpipe [0], EV_READ);
397	ev_io_start (&sigev);	583	ev_io_start (EV_A_ &sigev);
		584	ev_unref (EV_A); /* child watcher should not keep loop alive */
398	}	585	}
399		586
400	/*****************************************************************************/	587	/*****************************************************************************/
401		588
402	static struct ev_idle **idles;
403	static int idlemax, idlecnt;
404
405	static struct ev_prepare **prepares;
406	static int preparemax, preparecnt;
407
408	static struct ev_check **checks;
409	static int checkmax, checkcnt;
410
411	/*****************************************************************************/
412
413	static struct ev_child *childs [PID_HASHSIZE];	589	static struct ev_child *childs [PID_HASHSIZE];
		590
		591	#ifndef WIN32
		592
414	static struct ev_signal childev;	593	static struct ev_signal childev;
415		594
416	#ifndef WCONTINUED	595	#ifndef WCONTINUED
417	# define WCONTINUED 0	596	# define WCONTINUED 0
418	#endif	597	#endif
419		598
420	static void	599	static void
421	childcb (struct ev_signal *sw, int revents)	600	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
422	{	601	{
423	struct ev_child *w;	602	struct ev_child *w;
		603
		604	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		605	if (w->pid == pid \|\| !w->pid)
		606	{
		607	ev_priority (w) = ev_priority (sw); /* need to do it now */
		608	w->rpid = pid;
		609	w->rstatus = status;
		610	event (EV_A_ (W)w, EV_CHILD);
		611	}
		612	}
		613
		614	static void
		615	childcb (EV_P_ struct ev_signal *sw, int revents)
		616	{
424	int pid, status;	617	int pid, status;
425		618
426	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	619	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
427	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	620	{
428	if (w->pid == pid \|\| !w->pid)	621	/* make sure we are called again until all childs have been reaped */
429	{	622	event (EV_A_ (W)sw, EV_SIGNAL);
430	w->status = status;	623
431	event ((W)w, EV_CHILD);	624	child_reap (EV_A_ sw, pid, pid, status);
432	}	625	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		626	}
433	}	627	}
		628
		629	#endif
434		630
435	/*****************************************************************************/	631	/*****************************************************************************/
436		632
		633	#if EV_USE_KQUEUE
		634	# include "ev_kqueue.c"
		635	#endif
437	#if EV_USE_EPOLL	636	#if EV_USE_EPOLL
438	# include "ev_epoll.c"	637	# include "ev_epoll.c"
439	#endif	638	#endif
		639	#if EV_USE_POLL
		640	# include "ev_poll.c"
		641	#endif
440	#if EV_USE_SELECT	642	#if EV_USE_SELECT
441	# include "ev_select.c"	643	# include "ev_select.c"
442	#endif	644	#endif
443		645
444	int	646	int
…		…
451	ev_version_minor (void)	653	ev_version_minor (void)
452	{	654	{
453	return EV_VERSION_MINOR;	655	return EV_VERSION_MINOR;
454	}	656	}
455		657
456	int ev_init (int flags)	658	/* return true if we are running with elevated privileges and should ignore env variables */
		659	static int
		660	enable_secure (void)
457	{	661	{
		662	#ifdef WIN32
		663	return 0;
		664	#else
		665	return getuid () != geteuid ()
		666	\|\| getgid () != getegid ();
		667	#endif
		668	}
		669
		670	int
		671	ev_method (EV_P)
		672	{
		673	return method;
		674	}
		675
		676	static void
		677	loop_init (EV_P_ int methods)
		678	{
458	if (!ev_method)	679	if (!method)
459	{	680	{
460	#if EV_USE_MONOTONIC	681	#if EV_USE_MONOTONIC
461	{	682	{
462	struct timespec ts;	683	struct timespec ts;
463	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	684	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
464	have_monotonic = 1;	685	have_monotonic = 1;
465	}	686	}
466	#endif	687	#endif
467		688
468	ev_now = ev_time ();	689	rt_now = ev_time ();
469	now = get_clock ();	690	mn_now = get_clock ();
		691	now_floor = mn_now;
470	diff = ev_now - now;	692	rtmn_diff = rt_now - mn_now;
471		693
472	if (pipe (sigpipe))	694	if (methods == EVMETHOD_AUTO)
473	return 0;	695	if (!enable_secure () && getenv ("LIBEV_METHODS"))
474		696	methods = atoi (getenv ("LIBEV_METHODS"));
		697	else
475	ev_method = EVMETHOD_NONE;	698	methods = EVMETHOD_ANY;
		699
		700	method = 0;
		701	#if EV_USE_WIN32
		702	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		703	#endif
		704	#if EV_USE_KQUEUE
		705	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		706	#endif
476	#if EV_USE_EPOLL	707	#if EV_USE_EPOLL
477	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	708	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		709	#endif
		710	#if EV_USE_POLL
		711	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
478	#endif	712	#endif
479	#if EV_USE_SELECT	713	#if EV_USE_SELECT
480	if (ev_method == EVMETHOD_NONE) select_init (flags);	714	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
481	#endif	715	#endif
482		716
		717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
		719	}
		720	}
		721
		722	void
		723	loop_destroy (EV_P)
		724	{
		725	int i;
		726
		727	#if EV_USE_WIN32
		728	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		729	#endif
		730	#if EV_USE_KQUEUE
		731	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		732	#endif
		733	#if EV_USE_EPOLL
		734	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		735	#endif
		736	#if EV_USE_POLL
		737	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		738	#endif
		739	#if EV_USE_SELECT
		740	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		741	#endif
		742
		743	for (i = NUMPRI; i--; )
		744	array_free (pending, [i]);
		745
		746	/* have to use the microsoft-never-gets-it-right macro */
		747	array_free_microshit (fdchange);
		748	array_free_microshit (timer);
		749	array_free_microshit (periodic);
		750	array_free_microshit (idle);
		751	array_free_microshit (prepare);
		752	array_free_microshit (check);
		753
		754	method = 0;
		755	}
		756
		757	static void
		758	loop_fork (EV_P)
		759	{
		760	#if EV_USE_EPOLL
		761	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		762	#endif
		763	#if EV_USE_KQUEUE
		764	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		765	#endif
		766
		767	if (ev_is_active (&sigev))
		768	{
		769	/* default loop */
		770
		771	ev_ref (EV_A);
		772	ev_io_stop (EV_A_ &sigev);
		773	close (sigpipe [0]);
		774	close (sigpipe [1]);
		775
		776	while (pipe (sigpipe))
		777	syserr ("(libev) error creating pipe");
		778
		779	siginit (EV_A);
		780	}
		781
		782	postfork = 0;
		783	}
		784
		785	#if EV_MULTIPLICITY
		786	struct ev_loop *
		787	ev_loop_new (int methods)
		788	{
		789	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		790
		791	memset (loop, 0, sizeof (struct ev_loop));
		792
		793	loop_init (EV_A_ methods);
		794
		795	if (ev_method (EV_A))
		796	return loop;
		797
		798	return 0;
		799	}
		800
		801	void
		802	ev_loop_destroy (EV_P)
		803	{
		804	loop_destroy (EV_A);
		805	ev_free (loop);
		806	}
		807
		808	void
		809	ev_loop_fork (EV_P)
		810	{
		811	postfork = 1;
		812	}
		813
		814	#endif
		815
		816	#if EV_MULTIPLICITY
		817	struct ev_loop default_loop_struct;
		818	static struct ev_loop *default_loop;
		819
		820	struct ev_loop *
		821	#else
		822	static int default_loop;
		823
		824	int
		825	#endif
		826	ev_default_loop (int methods)
		827	{
		828	if (sigpipe [0] == sigpipe [1])
		829	if (pipe (sigpipe))
		830	return 0;
		831
		832	if (!default_loop)
		833	{
		834	#if EV_MULTIPLICITY
		835	struct ev_loop *loop = default_loop = &default_loop_struct;
		836	#else
		837	default_loop = 1;
		838	#endif
		839
		840	loop_init (EV_A_ methods);
		841
483	if (ev_method)	842	if (ev_method (EV_A))
484	{	843	{
485	ev_watcher_init (&sigev, sigcb);
486	siginit ();	844	siginit (EV_A);
487		845
		846	#ifndef WIN32
488	ev_signal_init (&childev, childcb, SIGCHLD);	847	ev_signal_init (&childev, childcb, SIGCHLD);
		848	ev_set_priority (&childev, EV_MAXPRI);
489	ev_signal_start (&childev);	849	ev_signal_start (EV_A_ &childev);
		850	ev_unref (EV_A); /* child watcher should not keep loop alive */
		851	#endif
490	}	852	}
		853	else
		854	default_loop = 0;
491	}	855	}
492		856
493	return ev_method;	857	return default_loop;
		858	}
		859
		860	void
		861	ev_default_destroy (void)
		862	{
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *loop = default_loop;
		865	#endif
		866
		867	#ifndef WIN32
		868	ev_ref (EV_A); /* child watcher */
		869	ev_signal_stop (EV_A_ &childev);
		870	#endif
		871
		872	ev_ref (EV_A); /* signal watcher */
		873	ev_io_stop (EV_A_ &sigev);
		874
		875	close (sigpipe [0]); sigpipe [0] = 0;
		876	close (sigpipe [1]); sigpipe [1] = 0;
		877
		878	loop_destroy (EV_A);
		879	}
		880
		881	void
		882	ev_default_fork (void)
		883	{
		884	#if EV_MULTIPLICITY
		885	struct ev_loop *loop = default_loop;
		886	#endif
		887
		888	if (method)
		889	postfork = 1;
494	}	890	}
495		891
496	/*****************************************************************************/	892	/*****************************************************************************/
497		893
498	void
499	ev_fork_prepare (void)
500	{
501	/* nop */
502	}
503
504	void
505	ev_fork_parent (void)
506	{
507	/* nop */
508	}
509
510	void
511	ev_fork_child (void)
512	{
513	#if EV_USE_EPOLL
514	if (ev_method == EVMETHOD_EPOLL)
515	epoll_postfork_child ();
516	#endif
517
518	ev_io_stop (&sigev);
519	close (sigpipe [0]);
520	close (sigpipe [1]);
521	pipe (sigpipe);
522	siginit ();
523	}
524
525	/*****************************************************************************/
526
527	static void	894	static void
528	call_pending (void)	895	call_pending (EV_P)
529	{	896	{
		897	int pri;
		898
		899	for (pri = NUMPRI; pri--; )
530	while (pendingcnt)	900	while (pendingcnt [pri])
531	{	901	{
532	ANPENDING *p = pendings + --pendingcnt;	902	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
533		903
534	if (p->w)	904	if (p->w)
535	{	905	{
536	p->w->pending = 0;	906	p->w->pending = 0;
537	p->w->cb (p->w, p->events);	907	p->w->cb (EV_A_ p->w, p->events);
538	}	908	}
539	}	909	}
540	}	910	}
541		911
542	static void	912	static void
543	timers_reify (void)	913	timers_reify (EV_P)
544	{	914	{
545	while (timercnt && timers [0]->at <= now)	915	while (timercnt && ((WT)timers [0])->at <= mn_now)
546	{	916	{
547	struct ev_timer *w = timers [0];	917	struct ev_timer *w = timers [0];
		918
		919	assert (("inactive timer on timer heap detected", ev_is_active (w)));
548		920
549	/* first reschedule or stop timer */	921	/* first reschedule or stop timer */
550	if (w->repeat)	922	if (w->repeat)
551	{	923	{
552	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	924	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
553	w->at = now + w->repeat;	925	((WT)w)->at = mn_now + w->repeat;
554	downheap ((WT *)timers, timercnt, 0);	926	downheap ((WT *)timers, timercnt, 0);
555	}	927	}
556	else	928	else
557	ev_timer_stop (w); /* nonrepeating: stop timer */	929	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
558		930
559	event ((W)w, EV_TIMEOUT);	931	event (EV_A_ (W)w, EV_TIMEOUT);
560	}	932	}
561	}	933	}
562		934
563	static void	935	static void
564	periodics_reify (void)	936	periodics_reify (EV_P)
565	{	937	{
566	while (periodiccnt && periodics [0]->at <= ev_now)	938	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
567	{	939	{
568	struct ev_periodic *w = periodics [0];	940	struct ev_periodic *w = periodics [0];
		941
		942	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
569		943
570	/* first reschedule or stop timer */	944	/* first reschedule or stop timer */
571	if (w->interval)	945	if (w->interval)
572	{	946	{
573	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	947	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
574	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	948	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
575	downheap ((WT *)periodics, periodiccnt, 0);	949	downheap ((WT *)periodics, periodiccnt, 0);
576	}	950	}
577	else	951	else
578	ev_periodic_stop (w); /* nonrepeating: stop timer */	952	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
579		953
580	event ((W)w, EV_PERIODIC);	954	event (EV_A_ (W)w, EV_PERIODIC);
581	}	955	}
582	}	956	}
583		957
584	static void	958	static void
585	periodics_reschedule (ev_tstamp diff)	959	periodics_reschedule (EV_P)
586	{	960	{
587	int i;	961	int i;
588		962
589	/* adjust periodics after time jump */	963	/* adjust periodics after time jump */
590	for (i = 0; i < periodiccnt; ++i)	964	for (i = 0; i < periodiccnt; ++i)
591	{	965	{
592	struct ev_periodic *w = periodics [i];	966	struct ev_periodic *w = periodics [i];
593		967
594	if (w->interval)	968	if (w->interval)
595	{	969	{
596	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	970	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
597		971
598	if (fabs (diff) >= 1e-4)	972	if (fabs (diff) >= 1e-4)
599	{	973	{
600	ev_periodic_stop (w);	974	ev_periodic_stop (EV_A_ w);
601	ev_periodic_start (w);	975	ev_periodic_start (EV_A_ w);
602		976
603	i = 0; /* restart loop, inefficient, but time jumps should be rare */	977	i = 0; /* restart loop, inefficient, but time jumps should be rare */
604	}	978	}
605	}	979	}
606	}	980	}
607	}	981	}
608		982
		983	inline int
		984	time_update_monotonic (EV_P)
		985	{
		986	mn_now = get_clock ();
		987
		988	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		989	{
		990	rt_now = rtmn_diff + mn_now;
		991	return 0;
		992	}
		993	else
		994	{
		995	now_floor = mn_now;
		996	rt_now = ev_time ();
		997	return 1;
		998	}
		999	}
		1000
609	static void	1001	static void
610	time_update (void)	1002	time_update (EV_P)
611	{	1003	{
612	int i;	1004	int i;
613		1005
614	ev_now = ev_time ();	1006	#if EV_USE_MONOTONIC
615
616	if (have_monotonic)	1007	if (expect_true (have_monotonic))
617	{	1008	{
618	ev_tstamp odiff = diff;	1009	if (time_update_monotonic (EV_A))
619
620	for (i = 4; --i; ) /* loop a few times, before making important decisions */
621	{	1010	{
622	now = get_clock ();	1011	ev_tstamp odiff = rtmn_diff;
		1012
		1013	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1014	{
623	diff = ev_now - now;	1015	rtmn_diff = rt_now - mn_now;
624		1016
625	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1017	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
626	return; /* all is well */	1018	return; /* all is well */
627		1019
628	ev_now = ev_time ();	1020	rt_now = ev_time ();
		1021	mn_now = get_clock ();
		1022	now_floor = mn_now;
		1023	}
		1024
		1025	periodics_reschedule (EV_A);
		1026	/* no timer adjustment, as the monotonic clock doesn't jump */
		1027	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
629	}	1028	}
630
631	periodics_reschedule (diff - odiff);
632	/* no timer adjustment, as the monotonic clock doesn't jump */
633	}	1029	}
634	else	1030	else
		1031	#endif
635	{	1032	{
636	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1033	rt_now = ev_time ();
		1034
		1035	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
637	{	1036	{
638	periodics_reschedule (ev_now - now);	1037	periodics_reschedule (EV_A);
639		1038
640	/* adjust timers. this is easy, as the offset is the same for all */	1039	/* adjust timers. this is easy, as the offset is the same for all */
641	for (i = 0; i < timercnt; ++i)	1040	for (i = 0; i < timercnt; ++i)
642	timers [i]->at += diff;	1041	((WT)timers [i])->at += rt_now - mn_now;
643	}	1042	}
644		1043
645	now = ev_now;	1044	mn_now = rt_now;
646	}	1045	}
647	}	1046	}
648		1047
649	int ev_loop_done;	1048	void
		1049	ev_ref (EV_P)
		1050	{
		1051	++activecnt;
		1052	}
650		1053
		1054	void
		1055	ev_unref (EV_P)
		1056	{
		1057	--activecnt;
		1058	}
		1059
		1060	static int loop_done;
		1061
		1062	void
651	void ev_loop (int flags)	1063	ev_loop (EV_P_ int flags)
652	{	1064	{
653	double block;	1065	double block;
654	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1066	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
655		1067
656	do	1068	do
657	{	1069	{
658	/* queue check watchers (and execute them) */	1070	/* queue check watchers (and execute them) */
659	if (preparecnt)	1071	if (expect_false (preparecnt))
660	{	1072	{
661	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1073	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662	call_pending ();	1074	call_pending (EV_A);
663	}	1075	}
664		1076
		1077	/* we might have forked, so reify kernel state if necessary */
		1078	if (expect_false (postfork))
		1079	loop_fork (EV_A);
		1080
665	/* update fd-related kernel structures */	1081	/* update fd-related kernel structures */
666	fd_reify ();	1082	fd_reify (EV_A);
667		1083
668	/* calculate blocking time */	1084	/* calculate blocking time */
669		1085
670	/* we only need this for !monotonic clockor timers, but as we basically	1086	/* we only need this for !monotonic clockor timers, but as we basically
671	always have timers, we just calculate it always */	1087	always have timers, we just calculate it always */
		1088	#if EV_USE_MONOTONIC
		1089	if (expect_true (have_monotonic))
		1090	time_update_monotonic (EV_A);
		1091	else
		1092	#endif
		1093	{
672	ev_now = ev_time ();	1094	rt_now = ev_time ();
		1095	mn_now = rt_now;
		1096	}
673		1097
674	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1098	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
675	block = 0.;	1099	block = 0.;
676	else	1100	else
677	{	1101	{
678	block = MAX_BLOCKTIME;	1102	block = MAX_BLOCKTIME;
679		1103
680	if (timercnt)	1104	if (timercnt)
681	{	1105	{
682	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1106	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
683	if (block > to) block = to;	1107	if (block > to) block = to;
684	}	1108	}
685		1109
686	if (periodiccnt)	1110	if (periodiccnt)
687	{	1111	{
688	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1112	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
689	if (block > to) block = to;	1113	if (block > to) block = to;
690	}	1114	}
691		1115
692	if (block < 0.) block = 0.;	1116	if (block < 0.) block = 0.;
693	}	1117	}
694		1118
695	method_poll (block);	1119	method_poll (EV_A_ block);
696		1120
697	/* update ev_now, do magic */	1121	/* update rt_now, do magic */
698	time_update ();	1122	time_update (EV_A);
699		1123
700	/* queue pending timers and reschedule them */	1124	/* queue pending timers and reschedule them */
701	timers_reify (); /* relative timers called last */	1125	timers_reify (EV_A); /* relative timers called last */
702	periodics_reify (); /* absolute timers called first */	1126	periodics_reify (EV_A); /* absolute timers called first */
703		1127
704	/* queue idle watchers unless io or timers are pending */	1128	/* queue idle watchers unless io or timers are pending */
705	if (!pendingcnt)	1129	if (!pendingcnt)
706	queue_events ((W *)idles, idlecnt, EV_IDLE);	1130	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
707		1131
708	/* queue check watchers, to be executed first */	1132	/* queue check watchers, to be executed first */
709	if (checkcnt)	1133	if (checkcnt)
710	queue_events ((W *)checks, checkcnt, EV_CHECK);	1134	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711		1135
712	call_pending ();	1136	call_pending (EV_A);
713	}	1137	}
714	while (!ev_loop_done);	1138	while (activecnt && !loop_done);
715		1139
716	if (ev_loop_done != 2)	1140	if (loop_done != 2)
717	ev_loop_done = 0;	1141	loop_done = 0;
		1142	}
		1143
		1144	void
		1145	ev_unloop (EV_P_ int how)
		1146	{
		1147	loop_done = how;
718	}	1148	}
719		1149
720	/*****************************************************************************/	1150	/*****************************************************************************/
721		1151
722	static void	1152	inline void
723	wlist_add (WL *head, WL elem)	1153	wlist_add (WL *head, WL elem)
724	{	1154	{
725	elem->next = *head;	1155	elem->next = *head;
726	*head = elem;	1156	*head = elem;
727	}	1157	}
728		1158
729	static void	1159	inline void
730	wlist_del (WL *head, WL elem)	1160	wlist_del (WL *head, WL elem)
731	{	1161	{
732	while (*head)	1162	while (*head)
733	{	1163	{
734	if (*head == elem)	1164	if (*head == elem)
…		…
739		1169
740	head = &(*head)->next;	1170	head = &(*head)->next;
741	}	1171	}
742	}	1172	}
743		1173
744	static void	1174	inline void
745	ev_clear_pending (W w)	1175	ev_clear_pending (EV_P_ W w)
746	{	1176	{
747	if (w->pending)	1177	if (w->pending)
748	{	1178	{
749	pendings [w->pending - 1].w = 0;	1179	pendings [ABSPRI (w)][w->pending - 1].w = 0;
750	w->pending = 0;	1180	w->pending = 0;
751	}	1181	}
752	}	1182	}
753		1183
754	static void	1184	inline void
755	ev_start (W w, int active)	1185	ev_start (EV_P_ W w, int active)
756	{	1186	{
		1187	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1188	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1189
757	w->active = active;	1190	w->active = active;
		1191	ev_ref (EV_A);
758	}	1192	}
759		1193
760	static void	1194	inline void
761	ev_stop (W w)	1195	ev_stop (EV_P_ W w)
762	{	1196	{
		1197	ev_unref (EV_A);
763	w->active = 0;	1198	w->active = 0;
764	}	1199	}
765		1200
766	/*****************************************************************************/	1201	/*****************************************************************************/
767		1202
768	void	1203	void
769	ev_io_start (struct ev_io *w)	1204	ev_io_start (EV_P_ struct ev_io *w)
770	{	1205	{
771	int fd = w->fd;	1206	int fd = w->fd;
772		1207
773	if (ev_is_active (w))	1208	if (ev_is_active (w))
774	return;	1209	return;
775		1210
776	assert (("ev_io_start called with negative fd", fd >= 0));	1211	assert (("ev_io_start called with negative fd", fd >= 0));
777		1212
778	ev_start ((W)w, 1);	1213	ev_start (EV_A_ (W)w, 1);
779	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1214	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
780	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1215	wlist_add ((WL *)&anfds[fd].head, (WL)w);
781		1216
782	fd_change (fd);	1217	fd_change (EV_A_ fd);
783	}	1218	}
784		1219
785	void	1220	void
786	ev_io_stop (struct ev_io *w)	1221	ev_io_stop (EV_P_ struct ev_io *w)
787	{	1222	{
788	ev_clear_pending ((W)w);	1223	ev_clear_pending (EV_A_ (W)w);
789	if (!ev_is_active (w))	1224	if (!ev_is_active (w))
790	return;	1225	return;
791		1226
792	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1227	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
793	ev_stop ((W)w);	1228	ev_stop (EV_A_ (W)w);
794		1229
795	fd_change (w->fd);	1230	fd_change (EV_A_ w->fd);
796	}	1231	}
797		1232
798	void	1233	void
799	ev_timer_start (struct ev_timer *w)	1234	ev_timer_start (EV_P_ struct ev_timer *w)
800	{	1235	{
801	if (ev_is_active (w))	1236	if (ev_is_active (w))
802	return;	1237	return;
803		1238
804	w->at += now;	1239	((WT)w)->at += mn_now;
805		1240
806	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1241	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807		1242
808	ev_start ((W)w, ++timercnt);	1243	ev_start (EV_A_ (W)w, ++timercnt);
809	array_needsize (timers, timermax, timercnt, );	1244	array_needsize (timers, timermax, timercnt, (void));
810	timers [timercnt - 1] = w;	1245	timers [timercnt - 1] = w;
811	upheap ((WT *)timers, timercnt - 1);	1246	upheap ((WT *)timers, timercnt - 1);
812	}
813		1247
		1248	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1249	}
		1250
814	void	1251	void
815	ev_timer_stop (struct ev_timer *w)	1252	ev_timer_stop (EV_P_ struct ev_timer *w)
816	{	1253	{
817	ev_clear_pending ((W)w);	1254	ev_clear_pending (EV_A_ (W)w);
818	if (!ev_is_active (w))	1255	if (!ev_is_active (w))
819	return;	1256	return;
820		1257
		1258	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1259
821	if (w->active < timercnt--)	1260	if (((W)w)->active < timercnt--)
822	{	1261	{
823	timers [w->active - 1] = timers [timercnt];	1262	timers [((W)w)->active - 1] = timers [timercnt];
824	downheap ((WT *)timers, timercnt, w->active - 1);	1263	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
825	}	1264	}
826		1265
827	w->at = w->repeat;	1266	((WT)w)->at = w->repeat;
828		1267
829	ev_stop ((W)w);	1268	ev_stop (EV_A_ (W)w);
830	}	1269	}
831		1270
832	void	1271	void
833	ev_timer_again (struct ev_timer *w)	1272	ev_timer_again (EV_P_ struct ev_timer *w)
834	{	1273	{
835	if (ev_is_active (w))	1274	if (ev_is_active (w))
836	{	1275	{
837	if (w->repeat)	1276	if (w->repeat)
838	{	1277	{
839	w->at = now + w->repeat;	1278	((WT)w)->at = mn_now + w->repeat;
840	downheap ((WT *)timers, timercnt, w->active - 1);	1279	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
841	}	1280	}
842	else	1281	else
843	ev_timer_stop (w);	1282	ev_timer_stop (EV_A_ w);
844	}	1283	}
845	else if (w->repeat)	1284	else if (w->repeat)
846	ev_timer_start (w);	1285	ev_timer_start (EV_A_ w);
847	}	1286	}
848		1287
849	void	1288	void
850	ev_periodic_start (struct ev_periodic *w)	1289	ev_periodic_start (EV_P_ struct ev_periodic *w)
851	{	1290	{
852	if (ev_is_active (w))	1291	if (ev_is_active (w))
853	return;	1292	return;
854		1293
855	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1294	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
856		1295
857	/* this formula differs from the one in periodic_reify because we do not always round up */	1296	/* this formula differs from the one in periodic_reify because we do not always round up */
858	if (w->interval)	1297	if (w->interval)
859	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1298	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
860		1299
861	ev_start ((W)w, ++periodiccnt);	1300	ev_start (EV_A_ (W)w, ++periodiccnt);
862	array_needsize (periodics, periodicmax, periodiccnt, );	1301	array_needsize (periodics, periodicmax, periodiccnt, (void));
863	periodics [periodiccnt - 1] = w;	1302	periodics [periodiccnt - 1] = w;
864	upheap ((WT *)periodics, periodiccnt - 1);	1303	upheap ((WT *)periodics, periodiccnt - 1);
865	}
866		1304
		1305	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1306	}
		1307
867	void	1308	void
868	ev_periodic_stop (struct ev_periodic *w)	1309	ev_periodic_stop (EV_P_ struct ev_periodic *w)
869	{	1310	{
870	ev_clear_pending ((W)w);	1311	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1312	if (!ev_is_active (w))
872	return;	1313	return;
873		1314
		1315	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1316
874	if (w->active < periodiccnt--)	1317	if (((W)w)->active < periodiccnt--)
875	{	1318	{
876	periodics [w->active - 1] = periodics [periodiccnt];	1319	periodics [((W)w)->active - 1] = periodics [periodiccnt];
877	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1320	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
878	}	1321	}
879		1322
880	ev_stop ((W)w);	1323	ev_stop (EV_A_ (W)w);
881	}	1324	}
882		1325
883	void	1326	void
884	ev_signal_start (struct ev_signal *w)	1327	ev_idle_start (EV_P_ struct ev_idle *w)
885	{	1328	{
886	if (ev_is_active (w))	1329	if (ev_is_active (w))
887	return;	1330	return;
888		1331
		1332	ev_start (EV_A_ (W)w, ++idlecnt);
		1333	array_needsize (idles, idlemax, idlecnt, (void));
		1334	idles [idlecnt - 1] = w;
		1335	}
		1336
		1337	void
		1338	ev_idle_stop (EV_P_ struct ev_idle *w)
		1339	{
		1340	ev_clear_pending (EV_A_ (W)w);
		1341	if (ev_is_active (w))
		1342	return;
		1343
		1344	idles [((W)w)->active - 1] = idles [--idlecnt];
		1345	ev_stop (EV_A_ (W)w);
		1346	}
		1347
		1348	void
		1349	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1350	{
		1351	if (ev_is_active (w))
		1352	return;
		1353
		1354	ev_start (EV_A_ (W)w, ++preparecnt);
		1355	array_needsize (prepares, preparemax, preparecnt, (void));
		1356	prepares [preparecnt - 1] = w;
		1357	}
		1358
		1359	void
		1360	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1361	{
		1362	ev_clear_pending (EV_A_ (W)w);
		1363	if (ev_is_active (w))
		1364	return;
		1365
		1366	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1367	ev_stop (EV_A_ (W)w);
		1368	}
		1369
		1370	void
		1371	ev_check_start (EV_P_ struct ev_check *w)
		1372	{
		1373	if (ev_is_active (w))
		1374	return;
		1375
		1376	ev_start (EV_A_ (W)w, ++checkcnt);
		1377	array_needsize (checks, checkmax, checkcnt, (void));
		1378	checks [checkcnt - 1] = w;
		1379	}
		1380
		1381	void
		1382	ev_check_stop (EV_P_ struct ev_check *w)
		1383	{
		1384	ev_clear_pending (EV_A_ (W)w);
		1385	if (ev_is_active (w))
		1386	return;
		1387
		1388	checks [((W)w)->active - 1] = checks [--checkcnt];
		1389	ev_stop (EV_A_ (W)w);
		1390	}
		1391
		1392	#ifndef SA_RESTART
		1393	# define SA_RESTART 0
		1394	#endif
		1395
		1396	void
		1397	ev_signal_start (EV_P_ struct ev_signal *w)
		1398	{
		1399	#if EV_MULTIPLICITY
		1400	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1401	#endif
		1402	if (ev_is_active (w))
		1403	return;
		1404
889	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1405	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
890		1406
891	ev_start ((W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
892	array_needsize (signals, signalmax, w->signum, signals_init);	1408	array_needsize (signals, signalmax, w->signum, signals_init);
893	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1409	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
894		1410
895	if (!w->next)	1411	if (!((WL)w)->next)
896	{	1412	{
		1413	#if WIN32
		1414	signal (w->signum, sighandler);
		1415	#else
897	struct sigaction sa;	1416	struct sigaction sa;
898	sa.sa_handler = sighandler;	1417	sa.sa_handler = sighandler;
899	sigfillset (&sa.sa_mask);	1418	sigfillset (&sa.sa_mask);
900	sa.sa_flags = 0;	1419	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901	sigaction (w->signum, &sa, 0);	1420	sigaction (w->signum, &sa, 0);
		1421	#endif
902	}	1422	}
903	}	1423	}
904		1424
905	void	1425	void
906	ev_signal_stop (struct ev_signal *w)	1426	ev_signal_stop (EV_P_ struct ev_signal *w)
907	{	1427	{
908	ev_clear_pending ((W)w);	1428	ev_clear_pending (EV_A_ (W)w);
909	if (!ev_is_active (w))	1429	if (!ev_is_active (w))
910	return;	1430	return;
911		1431
912	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1432	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
913	ev_stop ((W)w);	1433	ev_stop (EV_A_ (W)w);
914		1434
915	if (!signals [w->signum - 1].head)	1435	if (!signals [w->signum - 1].head)
916	signal (w->signum, SIG_DFL);	1436	signal (w->signum, SIG_DFL);
917	}	1437	}
918		1438
919	void	1439	void
920	ev_idle_start (struct ev_idle *w)	1440	ev_child_start (EV_P_ struct ev_child *w)
921	{	1441	{
		1442	#if EV_MULTIPLICITY
		1443	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1444	#endif
922	if (ev_is_active (w))	1445	if (ev_is_active (w))
923	return;	1446	return;
924		1447
925	ev_start ((W)w, ++idlecnt);	1448	ev_start (EV_A_ (W)w, 1);
926	array_needsize (idles, idlemax, idlecnt, );	1449	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
927	idles [idlecnt - 1] = w;
928	}	1450	}
929		1451
930	void	1452	void
931	ev_idle_stop (struct ev_idle *w)	1453	ev_child_stop (EV_P_ struct ev_child *w)
932	{	1454	{
933	ev_clear_pending ((W)w);	1455	ev_clear_pending (EV_A_ (W)w);
934	if (ev_is_active (w))	1456	if (ev_is_active (w))
935	return;	1457	return;
936		1458
937	idles [w->active - 1] = idles [--idlecnt];
938	ev_stop ((W)w);
939	}
940
941	void
942	ev_prepare_start (struct ev_prepare *w)
943	{
944	if (ev_is_active (w))
945	return;
946
947	ev_start ((W)w, ++preparecnt);
948	array_needsize (prepares, preparemax, preparecnt, );
949	prepares [preparecnt - 1] = w;
950	}
951
952	void
953	ev_prepare_stop (struct ev_prepare *w)
954	{
955	ev_clear_pending ((W)w);
956	if (ev_is_active (w))
957	return;
958
959	prepares [w->active - 1] = prepares [--preparecnt];
960	ev_stop ((W)w);
961	}
962
963	void
964	ev_check_start (struct ev_check *w)
965	{
966	if (ev_is_active (w))
967	return;
968
969	ev_start ((W)w, ++checkcnt);
970	array_needsize (checks, checkmax, checkcnt, );
971	checks [checkcnt - 1] = w;
972	}
973
974	void
975	ev_check_stop (struct ev_check *w)
976	{
977	ev_clear_pending ((W)w);
978	if (ev_is_active (w))
979	return;
980
981	checks [w->active - 1] = checks [--checkcnt];
982	ev_stop ((W)w);
983	}
984
985	void
986	ev_child_start (struct ev_child *w)
987	{
988	if (ev_is_active (w))
989	return;
990
991	ev_start ((W)w, 1);
992	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
993	}
994
995	void
996	ev_child_stop (struct ev_child *w)
997	{
998	ev_clear_pending ((W)w);
999	if (ev_is_active (w))
1000	return;
1001
1002	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1459	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1003	ev_stop ((W)w);	1460	ev_stop (EV_A_ (W)w);
1004	}	1461	}
1005		1462
1006	/*****************************************************************************/	1463	/*****************************************************************************/
1007		1464
1008	struct ev_once	1465	struct ev_once
…		…
1012	void (cb)(int revents, void arg);	1469	void (cb)(int revents, void arg);
1013	void *arg;	1470	void *arg;
1014	};	1471	};
1015		1472
1016	static void	1473	static void
1017	once_cb (struct ev_once *once, int revents)	1474	once_cb (EV_P_ struct ev_once *once, int revents)
1018	{	1475	{
1019	void (cb)(int revents, void arg) = once->cb;	1476	void (cb)(int revents, void arg) = once->cb;
1020	void *arg = once->arg;	1477	void *arg = once->arg;
1021		1478
1022	ev_io_stop (&once->io);	1479	ev_io_stop (EV_A_ &once->io);
1023	ev_timer_stop (&once->to);	1480	ev_timer_stop (EV_A_ &once->to);
1024	free (once);	1481	ev_free (once);
1025		1482
1026	cb (revents, arg);	1483	cb (revents, arg);
1027	}	1484	}
1028		1485
1029	static void	1486	static void
1030	once_cb_io (struct ev_io *w, int revents)	1487	once_cb_io (EV_P_ struct ev_io *w, int revents)
1031	{	1488	{
1032	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1489	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1033	}	1490	}
1034		1491
1035	static void	1492	static void
1036	once_cb_to (struct ev_timer *w, int revents)	1493	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1037	{	1494	{
1038	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1495	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1039	}	1496	}
1040		1497
1041	void	1498	void
1042	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1499	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1043	{	1500	{
1044	struct ev_once *once = malloc (sizeof (struct ev_once));	1501	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1045		1502
1046	if (!once)	1503	if (!once)
1047	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1504	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1048	else	1505	else
1049	{	1506	{
…		…
1052		1509
1053	ev_watcher_init (&once->io, once_cb_io);	1510	ev_watcher_init (&once->io, once_cb_io);
1054	if (fd >= 0)	1511	if (fd >= 0)
1055	{	1512	{
1056	ev_io_set (&once->io, fd, events);	1513	ev_io_set (&once->io, fd, events);
1057	ev_io_start (&once->io);	1514	ev_io_start (EV_A_ &once->io);
1058	}	1515	}
1059		1516
1060	ev_watcher_init (&once->to, once_cb_to);	1517	ev_watcher_init (&once->to, once_cb_to);
1061	if (timeout >= 0.)	1518	if (timeout >= 0.)
1062	{	1519	{
1063	ev_timer_set (&once->to, timeout, 0.);	1520	ev_timer_set (&once->to, timeout, 0.);
1064	ev_timer_start (&once->to);	1521	ev_timer_start (EV_A_ &once->to);
1065	}	1522	}
1066	}	1523	}
1067	}	1524	}
1068		1525
1069	/*****************************************************************************/
1070
1071	#if 0
1072
1073	struct ev_io wio;
1074
1075	static void
1076	sin_cb (struct ev_io *w, int revents)
1077	{
1078	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1079	}
1080
1081	static void
1082	ocb (struct ev_timer *w, int revents)
1083	{
1084	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1085	ev_timer_stop (w);
1086	ev_timer_start (w);
1087	}
1088
1089	static void
1090	scb (struct ev_signal *w, int revents)
1091	{
1092	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1093	ev_io_stop (&wio);
1094	ev_io_start (&wio);
1095	}
1096
1097	static void
1098	gcb (struct ev_signal *w, int revents)
1099	{
1100	fprintf (stderr, "generic %x\n", revents);
1101
1102	}
1103
1104	int main (void)
1105	{
1106	ev_init (0);
1107
1108	ev_io_init (&wio, sin_cb, 0, EV_READ);
1109	ev_io_start (&wio);
1110
1111	struct ev_timer t[10000];
1112
1113	#if 0
1114	int i;
1115	for (i = 0; i < 10000; ++i)
1116	{
1117	struct ev_timer *w = t + i;
1118	ev_watcher_init (w, ocb, i);
1119	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1120	ev_timer_start (w);
1121	if (drand48 () < 0.5)
1122	ev_timer_stop (w);
1123	}
1124	#endif
1125
1126	struct ev_timer t1;
1127	ev_timer_init (&t1, ocb, 5, 10);
1128	ev_timer_start (&t1);
1129
1130	struct ev_signal sig;
1131	ev_signal_init (&sig, scb, SIGQUIT);
1132	ev_signal_start (&sig);
1133
1134	struct ev_check cw;
1135	ev_check_init (&cw, gcb);
1136	ev_check_start (&cw);
1137
1138	struct ev_idle iw;
1139	ev_idle_init (&iw, gcb);
1140	ev_idle_start (&iw);
1141
1142	ev_loop (0);
1143
1144	return 0;
1145	}
1146
1147	#endif
1148
1149
1150
1151

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.39 by root, Thu Nov 1 17:17:32 2007 UTC vs. Revision 1.73 by root, Tue Nov 6 16:27:10 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.39 by root, Thu Nov 1 17:17:32 2007 UTC vs.
Revision 1.73 by root, Tue Nov 6 16:27:10 2007 UTC