[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 1.75 by root, Tue Nov 6 19:29:20 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	30	*/
31	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
32	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
33	#endif	55	#endif
34		56
35	#include <math.h>	57	#include <math.h>
36	#include <stdlib.h>	58	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	59	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	60	#include <stddef.h>
41		61
42	#include <stdio.h>	62	#include <stdio.h>
43		63
44	#include <assert.h>	64	#include <assert.h>
45	#include <errno.h>	65	#include <errno.h>
46	#include <sys/types.h>	66	#include <sys/types.h>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	67	#include <time.h>
50		68
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
51	#ifndef EV_USE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
54	# endif
55	#endif	80	#endif
56		81
57	#ifndef EV_USE_SELECT	82	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	83	# define EV_USE_SELECT 1
59	#endif	84	#endif
60		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
61	#ifndef EV_USE_EPOLL	90	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	91	# define EV_USE_EPOLL 0
63	#endif	92	#endif
64		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	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
65	#ifndef CLOCK_REALTIME	119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	121	# define EV_USE_REALTIME 0
67	#endif	122	#endif
68	#ifndef EV_USE_REALTIME	123
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	124	/**/
70	#endif
71		125
72	#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) */
73	#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) */
74	#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 */
75	#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 */
76		130
77	#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)
78		146
79	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
82		150
83	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
84	ev_tstamp ev_now;
85	int ev_method;
86		152
87	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
88
89	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
90	static void (*method_modify)(int fd, int oev, int nev);
91	static void (*method_poll)(ev_tstamp timeout);
92		154
93	/*****************************************************************************/	155	/*****************************************************************************/
94		156
95	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
96	ev_time (void)	239	ev_time (void)
97	{	240	{
98	#if EV_USE_REALTIME	241	#if EV_USE_REALTIME
99	struct timespec ts;	242	struct timespec ts;
100	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
…		…
104	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	249	#endif
107	}	250	}
108		251
109	static ev_tstamp	252	inline ev_tstamp
110	get_clock (void)	253	get_clock (void)
111	{	254	{
112	#if EV_USE_MONOTONIC	255	#if EV_USE_MONOTONIC
113	if (have_monotonic)	256	if (expect_true (have_monotonic))
114	{	257	{
115	struct timespec ts;	258	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	261	}
119	#endif	262	#endif
120		263
121	return ev_time ();	264	return ev_time ();
122	}	265	}
123		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
124	#define array_roundsize(base,n) ((n) \| 4 & ~3)	273	#define array_roundsize(type,n) ((n) \| 4 & ~3)
125		274
126	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
127	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
128	{ \	277	{ \
129	int newcnt = cur; \	278	int newcnt = cur; \
130	do \	279	do \
131	{ \	280	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	281	newcnt = array_roundsize (type, newcnt << 1); \
133	} \	282	} \
134	while ((cnt) > newcnt); \	283	while ((cnt) > newcnt); \
135	\	284	\
136	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
137	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
138	cur = newcnt; \	287	cur = newcnt; \
139	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
140		305
141	/*****************************************************************************/	306	/*****************************************************************************/
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		307
153	static void	308	static void
154	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
155	{	310	{
156	while (count--)	311	while (count--)
…		…
161		316
162	++base;	317	++base;
163	}	318	}
164	}	319	}
165		320
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	321	static void
176	event (W w, int events)	322	event (EV_P_ W w, int events)
177	{	323	{
178	if (w->pending)	324	if (w->pending)
179	{	325	{
180	pendings [w->pending - 1].events \|= events;	326	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
181	return;	327	return;
182	}	328	}
183		329
184	w->pending = ++pendingcnt;	330	w->pending = ++pendingcnt [ABSPRI (w)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	331	array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
186	pendings [pendingcnt - 1].w = w;	332	pendings [ABSPRI (w)][w->pending - 1].w = w;
187	pendings [pendingcnt - 1].events = events;	333	pendings [ABSPRI (w)][w->pending - 1].events = events;
188	}	334	}
189		335
190	static void	336	static void
191	queue_events (W *events, int eventcnt, int type)	337	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	338	{
193	int i;	339	int i;
194		340
195	for (i = 0; i < eventcnt; ++i)	341	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	342	event (EV_A_ events [i], type);
197	}	343	}
198		344
199	static void	345	static void
200	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
201	{	347	{
202	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	349	struct ev_io *w;
204		350
205	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
206	{	352	{
207	int ev = w->events & events;	353	int ev = w->events & events;
208		354
209	if (ev)	355	if (ev)
210	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
211	}	357	}
212	}	358	}
213		359
214	/*****************************************************************************/	360	/*****************************************************************************/
215		361
216	static int *fdchanges;
217	static int fdchangemax, fdchangecnt;
218
219	static void	362	static void
220	fd_reify (void)	363	fd_reify (EV_P)
221	{	364	{
222	int i;	365	int i;
223		366
224	for (i = 0; i < fdchangecnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
225	{	368	{
…		…
227	ANFD *anfd = anfds + fd;	370	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	371	struct ev_io *w;
229		372
230	int events = 0;	373	int events = 0;
231		374
232	for (w = anfd->head; w; w = w->next)	375	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
233	events \|= w->events;	376	events \|= w->events;
234		377
235	anfd->reify = 0;	378	anfd->reify = 0;
236		379
237	if (anfd->events != events)
238	{
239	method_modify (fd, anfd->events, events);	380	method_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	381	anfd->events = events;
241	}
242	}	382	}
243		383
244	fdchangecnt = 0;	384	fdchangecnt = 0;
245	}	385	}
246		386
247	static void	387	static void
248	fd_change (int fd)	388	fd_change (EV_P_ int fd)
249	{	389	{
250	if (anfds [fd].reify \|\| fdchangecnt < 0)	390	if (anfds [fd].reify)
251	return;	391	return;
252		392
253	anfds [fd].reify = 1;	393	anfds [fd].reify = 1;
254		394
255	++fdchangecnt;	395	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	396	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
257	fdchanges [fdchangecnt - 1] = fd;	397	fdchanges [fdchangecnt - 1] = fd;
258	}	398	}
259		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
260	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
261	static void	423	static void
262	fd_recheck (void)	424	fd_ebadf (EV_P)
263	{	425	{
264	int fd;	426	int fd;
265		427
266	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	429	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
269	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)
270	{	442	{
271	ev_io_stop (anfds [fd].head);	443	fd_kill (EV_A_ fd);
272	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	444	return;
273	}	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	}
274	}	461	}
275		462
276	/*****************************************************************************/	463	/*****************************************************************************/
277		464
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	465	static void
285	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
286	{	467	{
287	WT w = timers [k];	468	WT w = heap [k];
288		469
289	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
290	{	471	{
291	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
293	k >>= 1;	474	k >>= 1;
294	}	475	}
295		476
296	timers [k] = w;	477	heap [k] = w;
297	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
298		479
299	}	480	}
300		481
301	static void	482	static void
302	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
303	{	484	{
304	WT w = timers [k];	485	WT w = heap [k];
305		486
306	while (k < (N >> 1))	487	while (k < (N >> 1))
307	{	488	{
308	int j = k << 1;	489	int j = k << 1;
309		490
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	492	++j;
312		493
313	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
314	break;	495	break;
315		496
316	timers [k] = timers [j];	497	heap [k] = heap [j];
317	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
318	k = j;	499	k = j;
319	}	500	}
320		501
321	timers [k] = w;	502	heap [k] = w;
322	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
323	}	504	}
324		505
325	/*****************************************************************************/	506	/*****************************************************************************/
326		507
327	typedef struct	508	typedef struct
328	{	509	{
329	struct ev_signal *head;	510	WL head;
330	sig_atomic_t volatile gotsig;	511	sig_atomic_t volatile gotsig;
331	} ANSIG;	512	} ANSIG;
332		513
333	static ANSIG *signals;	514	static ANSIG *signals;
334	static int signalmax;	515	static int signalmax;
…		…
350	}	531	}
351		532
352	static void	533	static void
353	sighandler (int signum)	534	sighandler (int signum)
354	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
355	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
356		541
357	if (!gotsig)	542	if (!gotsig)
358	{	543	{
		544	int old_errno = errno;
359	gotsig = 1;	545	gotsig = 1;
		546	#ifdef WIN32
		547	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		548	#else
360	write (sigpipe [1], &signum, 1);	549	write (sigpipe [1], &signum, 1);
		550	#endif
		551	errno = old_errno;
361	}	552	}
362	}	553	}
363		554
364	static void	555	static void
365	sigcb (struct ev_io *iow, int revents)	556	sigcb (EV_P_ struct ev_io *iow, int revents)
366	{	557	{
367	struct ev_signal *w;	558	WL w;
368	int sig;	559	int signum;
369		560
		561	#ifdef WIN32
		562	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		563	#else
370	read (sigpipe [0], &revents, 1);	564	read (sigpipe [0], &revents, 1);
		565	#endif
371	gotsig = 0;	566	gotsig = 0;
372		567
373	for (sig = signalmax; sig--; )	568	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	569	if (signals [signum].gotsig)
375	{	570	{
376	signals [sig].gotsig = 0;	571	signals [signum].gotsig = 0;
377		572
378	for (w = signals [sig].head; w; w = w->next)	573	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	574	event (EV_A_ (W)w, EV_SIGNAL);
380	}	575	}
381	}	576	}
382		577
383	static void	578	static void
384	siginit (void)	579	siginit (EV_P)
385	{	580	{
		581	#ifndef WIN32
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	582	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	583	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388		584
389	/* rather than sort out wether we really need nb, set it */	585	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	586	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	587	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		588	#endif
392		589
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	590	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	591	ev_io_start (EV_A_ &sigev);
		592	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	593	}
396		594
397	/*****************************************************************************/	595	/*****************************************************************************/
398		596
399	static struct ev_idle **idles;
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
410	static struct ev_child *childs [PID_HASHSIZE];	597	static struct ev_child *childs [PID_HASHSIZE];
		598
		599	#ifndef WIN32
		600
411	static struct ev_signal childev;	601	static struct ev_signal childev;
412		602
413	#ifndef WCONTINUED	603	#ifndef WCONTINUED
414	# define WCONTINUED 0	604	# define WCONTINUED 0
415	#endif	605	#endif
416		606
417	static void	607	static void
418	childcb (struct ev_signal *sw, int revents)	608	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
419	{	609	{
420	struct ev_child *w;	610	struct ev_child *w;
		611
		612	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		613	if (w->pid == pid \|\| !w->pid)
		614	{
		615	ev_priority (w) = ev_priority (sw); /* need to do it now */
		616	w->rpid = pid;
		617	w->rstatus = status;
		618	event (EV_A_ (W)w, EV_CHILD);
		619	}
		620	}
		621
		622	static void
		623	childcb (EV_P_ struct ev_signal *sw, int revents)
		624	{
421	int pid, status;	625	int pid, status;
422		626
423	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	627	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	628	{
425	if (w->pid == pid \|\| w->pid == -1)	629	/* make sure we are called again until all childs have been reaped */
426	{	630	event (EV_A_ (W)sw, EV_SIGNAL);
427	w->status = status;	631
428	event ((W)w, EV_CHILD);	632	child_reap (EV_A_ sw, pid, pid, status);
429	}	633	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		634	}
430	}	635	}
		636
		637	#endif
431		638
432	/*****************************************************************************/	639	/*****************************************************************************/
433		640
		641	#if EV_USE_KQUEUE
		642	# include "ev_kqueue.c"
		643	#endif
434	#if EV_USE_EPOLL	644	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	645	# include "ev_epoll.c"
436	#endif	646	#endif
		647	#if EV_USE_POLL
		648	# include "ev_poll.c"
		649	#endif
437	#if EV_USE_SELECT	650	#if EV_USE_SELECT
438	# include "ev_select.c"	651	# include "ev_select.c"
439	#endif	652	#endif
440		653
441	int	654	int
…		…
448	ev_version_minor (void)	661	ev_version_minor (void)
449	{	662	{
450	return EV_VERSION_MINOR;	663	return EV_VERSION_MINOR;
451	}	664	}
452		665
453	int ev_init (int flags)	666	/* return true if we are running with elevated privileges and should ignore env variables */
		667	static int
		668	enable_secure (void)
454	{	669	{
		670	#ifdef WIN32
		671	return 0;
		672	#else
		673	return getuid () != geteuid ()
		674	\|\| getgid () != getegid ();
		675	#endif
		676	}
		677
		678	int
		679	ev_method (EV_P)
		680	{
		681	return method;
		682	}
		683
		684	static void
		685	loop_init (EV_P_ int methods)
		686	{
455	if (!ev_method)	687	if (!method)
456	{	688	{
457	#if EV_USE_MONOTONIC	689	#if EV_USE_MONOTONIC
458	{	690	{
459	struct timespec ts;	691	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	692	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	693	have_monotonic = 1;
462	}	694	}
463	#endif	695	#endif
464		696
465	ev_now = ev_time ();	697	rt_now = ev_time ();
466	now = get_clock ();	698	mn_now = get_clock ();
		699	now_floor = mn_now;
467	diff = ev_now - now;	700	rtmn_diff = rt_now - mn_now;
468		701
469	if (pipe (sigpipe))	702	if (methods == EVMETHOD_AUTO)
470	return 0;	703	if (!enable_secure () && getenv ("LIBEV_METHODS"))
471		704	methods = atoi (getenv ("LIBEV_METHODS"));
		705	else
472	ev_method = EVMETHOD_NONE;	706	methods = EVMETHOD_ANY;
		707
		708	method = 0;
		709	#if EV_USE_WIN32
		710	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		711	#endif
		712	#if EV_USE_KQUEUE
		713	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		714	#endif
473	#if EV_USE_EPOLL	715	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	716	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		717	#endif
		718	#if EV_USE_POLL
		719	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
475	#endif	720	#endif
476	#if EV_USE_SELECT	721	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	722	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
478	#endif	723	#endif
479		724
		725	ev_watcher_init (&sigev, sigcb);
		726	ev_set_priority (&sigev, EV_MAXPRI);
		727	}
		728	}
		729
		730	void
		731	loop_destroy (EV_P)
		732	{
		733	int i;
		734
		735	#if EV_USE_WIN32
		736	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		737	#endif
		738	#if EV_USE_KQUEUE
		739	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		740	#endif
		741	#if EV_USE_EPOLL
		742	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		743	#endif
		744	#if EV_USE_POLL
		745	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		746	#endif
		747	#if EV_USE_SELECT
		748	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		749	#endif
		750
		751	for (i = NUMPRI; i--; )
		752	array_free (pending, [i]);
		753
		754	/* have to use the microsoft-never-gets-it-right macro */
		755	array_free_microshit (fdchange);
		756	array_free_microshit (timer);
		757	array_free_microshit (periodic);
		758	array_free_microshit (idle);
		759	array_free_microshit (prepare);
		760	array_free_microshit (check);
		761
		762	method = 0;
		763	}
		764
		765	static void
		766	loop_fork (EV_P)
		767	{
		768	#if EV_USE_EPOLL
		769	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		770	#endif
		771	#if EV_USE_KQUEUE
		772	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		773	#endif
		774
		775	if (ev_is_active (&sigev))
		776	{
		777	/* default loop */
		778
		779	ev_ref (EV_A);
		780	ev_io_stop (EV_A_ &sigev);
		781	close (sigpipe [0]);
		782	close (sigpipe [1]);
		783
		784	while (pipe (sigpipe))
		785	syserr ("(libev) error creating pipe");
		786
		787	siginit (EV_A);
		788	}
		789
		790	postfork = 0;
		791	}
		792
		793	#if EV_MULTIPLICITY
		794	struct ev_loop *
		795	ev_loop_new (int methods)
		796	{
		797	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		798
		799	memset (loop, 0, sizeof (struct ev_loop));
		800
		801	loop_init (EV_A_ methods);
		802
		803	if (ev_method (EV_A))
		804	return loop;
		805
		806	return 0;
		807	}
		808
		809	void
		810	ev_loop_destroy (EV_P)
		811	{
		812	loop_destroy (EV_A);
		813	ev_free (loop);
		814	}
		815
		816	void
		817	ev_loop_fork (EV_P)
		818	{
		819	postfork = 1;
		820	}
		821
		822	#endif
		823
		824	#if EV_MULTIPLICITY
		825	struct ev_loop default_loop_struct;
		826	static struct ev_loop *default_loop;
		827
		828	struct ev_loop *
		829	#else
		830	static int default_loop;
		831
		832	int
		833	#endif
		834	ev_default_loop (int methods)
		835	{
		836	if (sigpipe [0] == sigpipe [1])
		837	if (pipe (sigpipe))
		838	return 0;
		839
		840	if (!default_loop)
		841	{
		842	#if EV_MULTIPLICITY
		843	struct ev_loop *loop = default_loop = &default_loop_struct;
		844	#else
		845	default_loop = 1;
		846	#endif
		847
		848	loop_init (EV_A_ methods);
		849
480	if (ev_method)	850	if (ev_method (EV_A))
481	{	851	{
482	ev_watcher_init (&sigev, sigcb);
483	siginit ();	852	siginit (EV_A);
484		853
		854	#ifndef WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	855	ev_signal_init (&childev, childcb, SIGCHLD);
		856	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	857	ev_signal_start (EV_A_ &childev);
		858	ev_unref (EV_A); /* child watcher should not keep loop alive */
		859	#endif
487	}	860	}
		861	else
		862	default_loop = 0;
488	}	863	}
489		864
490	return ev_method;	865	return default_loop;
		866	}
		867
		868	void
		869	ev_default_destroy (void)
		870	{
		871	#if EV_MULTIPLICITY
		872	struct ev_loop *loop = default_loop;
		873	#endif
		874
		875	#ifndef WIN32
		876	ev_ref (EV_A); /* child watcher */
		877	ev_signal_stop (EV_A_ &childev);
		878	#endif
		879
		880	ev_ref (EV_A); /* signal watcher */
		881	ev_io_stop (EV_A_ &sigev);
		882
		883	close (sigpipe [0]); sigpipe [0] = 0;
		884	close (sigpipe [1]); sigpipe [1] = 0;
		885
		886	loop_destroy (EV_A);
		887	}
		888
		889	void
		890	ev_default_fork (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
		896	if (method)
		897	postfork = 1;
491	}	898	}
492		899
493	/*****************************************************************************/	900	/*****************************************************************************/
494		901
495	void
496	ev_fork_prepare (void)
497	{
498	/* nop */
499	}
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
514
515	ev_io_stop (&sigev);
516	close (sigpipe [0]);
517	close (sigpipe [1]);
518	pipe (sigpipe);
519	siginit ();
520	}
521
522	/*****************************************************************************/
523
524	static void	902	static void
525	call_pending (void)	903	call_pending (EV_P)
526	{	904	{
		905	int pri;
		906
		907	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	908	while (pendingcnt [pri])
528	{	909	{
529	ANPENDING *p = pendings + --pendingcnt;	910	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		911
531	if (p->w)	912	if (p->w)
532	{	913	{
533	p->w->pending = 0;	914	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	915	p->w->cb (EV_A_ p->w, p->events);
535	}	916	}
536	}	917	}
537	}	918	}
538		919
539	static void	920	static void
540	timers_reify (void)	921	timers_reify (EV_P)
541	{	922	{
542	while (timercnt && timers [0]->at <= now)	923	while (timercnt && ((WT)timers [0])->at <= mn_now)
543	{	924	{
544	struct ev_timer *w = timers [0];	925	struct ev_timer *w = timers [0];
		926
		927	assert (("inactive timer on timer heap detected", ev_is_active (w)));
545		928
546	/* first reschedule or stop timer */	929	/* first reschedule or stop timer */
547	if (w->repeat)	930	if (w->repeat)
548	{	931	{
549	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	932	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
550	w->at = now + w->repeat;	933	((WT)w)->at = mn_now + w->repeat;
551	downheap ((WT *)timers, timercnt, 0);	934	downheap ((WT *)timers, timercnt, 0);
552	}	935	}
553	else	936	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	937	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		938
556	event ((W)w, EV_TIMEOUT);	939	event (EV_A_ (W)w, EV_TIMEOUT);
557	}	940	}
558	}	941	}
559		942
560	static void	943	static void
561	periodics_reify (void)	944	periodics_reify (EV_P)
562	{	945	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	946	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
564	{	947	{
565	struct ev_periodic *w = periodics [0];	948	struct ev_periodic *w = periodics [0];
		949
		950	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
566		951
567	/* first reschedule or stop timer */	952	/* first reschedule or stop timer */
568	if (w->interval)	953	if (w->interval)
569	{	954	{
570	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	955	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
571	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	956	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
572	downheap ((WT *)periodics, periodiccnt, 0);	957	downheap ((WT *)periodics, periodiccnt, 0);
573	}	958	}
574	else	959	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	960	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		961
577	event ((W)w, EV_PERIODIC);	962	event (EV_A_ (W)w, EV_PERIODIC);
578	}	963	}
579	}	964	}
580		965
581	static void	966	static void
582	periodics_reschedule (ev_tstamp diff)	967	periodics_reschedule (EV_P)
583	{	968	{
584	int i;	969	int i;
585		970
586	/* adjust periodics after time jump */	971	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	972	for (i = 0; i < periodiccnt; ++i)
588	{	973	{
589	struct ev_periodic *w = periodics [i];	974	struct ev_periodic *w = periodics [i];
590		975
591	if (w->interval)	976	if (w->interval)
592	{	977	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	978	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
594		979
595	if (fabs (diff) >= 1e-4)	980	if (fabs (diff) >= 1e-4)
596	{	981	{
597	ev_periodic_stop (w);	982	ev_periodic_stop (EV_A_ w);
598	ev_periodic_start (w);	983	ev_periodic_start (EV_A_ w);
599		984
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	985	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	986	}
602	}	987	}
603	}	988	}
604	}	989	}
605		990
		991	inline int
		992	time_update_monotonic (EV_P)
		993	{
		994	mn_now = get_clock ();
		995
		996	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		997	{
		998	rt_now = rtmn_diff + mn_now;
		999	return 0;
		1000	}
		1001	else
		1002	{
		1003	now_floor = mn_now;
		1004	rt_now = ev_time ();
		1005	return 1;
		1006	}
		1007	}
		1008
606	static void	1009	static void
607	time_update (void)	1010	time_update (EV_P)
608	{	1011	{
609	int i;	1012	int i;
610		1013
611	ev_now = ev_time ();	1014	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	1015	if (expect_true (have_monotonic))
614	{	1016	{
615	ev_tstamp odiff = diff;	1017	if (time_update_monotonic (EV_A))
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	1018	{
619	now = get_clock ();	1019	ev_tstamp odiff = rtmn_diff;
		1020
		1021	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1022	{
620	diff = ev_now - now;	1023	rtmn_diff = rt_now - mn_now;
621		1024
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1025	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	1026	return; /* all is well */
624		1027
625	ev_now = ev_time ();	1028	rt_now = ev_time ();
		1029	mn_now = get_clock ();
		1030	now_floor = mn_now;
		1031	}
		1032
		1033	periodics_reschedule (EV_A);
		1034	/* no timer adjustment, as the monotonic clock doesn't jump */
		1035	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
626	}	1036	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}	1037	}
631	else	1038	else
		1039	#endif
632	{	1040	{
633	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1041	rt_now = ev_time ();
		1042
		1043	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
634	{	1044	{
635	periodics_reschedule (ev_now - now);	1045	periodics_reschedule (EV_A);
636		1046
637	/* adjust timers. this is easy, as the offset is the same for all */	1047	/* adjust timers. this is easy, as the offset is the same for all */
638	for (i = 0; i < timercnt; ++i)	1048	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	1049	((WT)timers [i])->at += rt_now - mn_now;
640	}	1050	}
641		1051
642	now = ev_now;	1052	mn_now = rt_now;
643	}	1053	}
644	}	1054	}
645		1055
646	int ev_loop_done;	1056	void
		1057	ev_ref (EV_P)
		1058	{
		1059	++activecnt;
		1060	}
647		1061
		1062	void
		1063	ev_unref (EV_P)
		1064	{
		1065	--activecnt;
		1066	}
		1067
		1068	static int loop_done;
		1069
		1070	void
648	void ev_loop (int flags)	1071	ev_loop (EV_P_ int flags)
649	{	1072	{
650	double block;	1073	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1074	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
652		1075
653	do	1076	do
654	{	1077	{
655	/* queue check watchers (and execute them) */	1078	/* queue check watchers (and execute them) */
656	if (preparecnt)	1079	if (expect_false (preparecnt))
657	{	1080	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1081	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	1082	call_pending (EV_A);
660	}	1083	}
661		1084
		1085	/* we might have forked, so reify kernel state if necessary */
		1086	if (expect_false (postfork))
		1087	loop_fork (EV_A);
		1088
662	/* update fd-related kernel structures */	1089	/* update fd-related kernel structures */
663	fd_reify ();	1090	fd_reify (EV_A);
664		1091
665	/* calculate blocking time */	1092	/* calculate blocking time */
666		1093
667	/* we only need this for !monotonic clockor timers, but as we basically	1094	/* we only need this for !monotonic clockor timers, but as we basically
668	always have timers, we just calculate it always */	1095	always have timers, we just calculate it always */
		1096	#if EV_USE_MONOTONIC
		1097	if (expect_true (have_monotonic))
		1098	time_update_monotonic (EV_A);
		1099	else
		1100	#endif
		1101	{
669	ev_now = ev_time ();	1102	rt_now = ev_time ();
		1103	mn_now = rt_now;
		1104	}
670		1105
671	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1106	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
672	block = 0.;	1107	block = 0.;
673	else	1108	else
674	{	1109	{
675	block = MAX_BLOCKTIME;	1110	block = MAX_BLOCKTIME;
676		1111
677	if (timercnt)	1112	if (timercnt)
678	{	1113	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1114	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
680	if (block > to) block = to;	1115	if (block > to) block = to;
681	}	1116	}
682		1117
683	if (periodiccnt)	1118	if (periodiccnt)
684	{	1119	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1120	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
686	if (block > to) block = to;	1121	if (block > to) block = to;
687	}	1122	}
688		1123
689	if (block < 0.) block = 0.;	1124	if (block < 0.) block = 0.;
690	}	1125	}
691		1126
692	method_poll (block);	1127	method_poll (EV_A_ block);
693		1128
694	/* update ev_now, do magic */	1129	/* update rt_now, do magic */
695	time_update ();	1130	time_update (EV_A);
696		1131
697	/* queue pending timers and reschedule them */	1132	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	1133	timers_reify (EV_A); /* relative timers called last */
699	periodics_reify (); /* absolute timers called first */	1134	periodics_reify (EV_A); /* absolute timers called first */
700		1135
701	/* queue idle watchers unless io or timers are pending */	1136	/* queue idle watchers unless io or timers are pending */
702	if (!pendingcnt)	1137	if (!pendingcnt)
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	1138	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		1139
705	/* queue check watchers, to be executed first */	1140	/* queue check watchers, to be executed first */
706	if (checkcnt)	1141	if (checkcnt)
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	1142	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		1143
709	call_pending ();	1144	call_pending (EV_A);
710	}	1145	}
711	while (!ev_loop_done);	1146	while (activecnt && !loop_done);
712		1147
713	if (ev_loop_done != 2)	1148	if (loop_done != 2)
714	ev_loop_done = 0;	1149	loop_done = 0;
		1150	}
		1151
		1152	void
		1153	ev_unloop (EV_P_ int how)
		1154	{
		1155	loop_done = how;
715	}	1156	}
716		1157
717	/*****************************************************************************/	1158	/*****************************************************************************/
718		1159
719	static void	1160	inline void
720	wlist_add (WL *head, WL elem)	1161	wlist_add (WL *head, WL elem)
721	{	1162	{
722	elem->next = *head;	1163	elem->next = *head;
723	*head = elem;	1164	*head = elem;
724	}	1165	}
725		1166
726	static void	1167	inline void
727	wlist_del (WL *head, WL elem)	1168	wlist_del (WL *head, WL elem)
728	{	1169	{
729	while (*head)	1170	while (*head)
730	{	1171	{
731	if (*head == elem)	1172	if (*head == elem)
…		…
736		1177
737	head = &(*head)->next;	1178	head = &(*head)->next;
738	}	1179	}
739	}	1180	}
740		1181
741	static void	1182	inline void
742	ev_clear_pending (W w)	1183	ev_clear_pending (EV_P_ W w)
743	{	1184	{
744	if (w->pending)	1185	if (w->pending)
745	{	1186	{
746	pendings [w->pending - 1].w = 0;	1187	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1188	w->pending = 0;
748	}	1189	}
749	}	1190	}
750		1191
751	static void	1192	inline void
752	ev_start (W w, int active)	1193	ev_start (EV_P_ W w, int active)
753	{	1194	{
		1195	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1196	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1197
754	w->active = active;	1198	w->active = active;
		1199	ev_ref (EV_A);
755	}	1200	}
756		1201
757	static void	1202	inline void
758	ev_stop (W w)	1203	ev_stop (EV_P_ W w)
759	{	1204	{
		1205	ev_unref (EV_A);
760	w->active = 0;	1206	w->active = 0;
761	}	1207	}
762		1208
763	/*****************************************************************************/	1209	/*****************************************************************************/
764		1210
765	void	1211	void
766	ev_io_start (struct ev_io *w)	1212	ev_io_start (EV_P_ struct ev_io *w)
767	{	1213	{
		1214	int fd = w->fd;
		1215
768	if (ev_is_active (w))	1216	if (ev_is_active (w))
769	return;	1217	return;
770		1218
771	int fd = w->fd;
772
773	assert (("ev_io_start called with negative fd", fd >= 0));	1219	assert (("ev_io_start called with negative fd", fd >= 0));
774		1220
775	ev_start ((W)w, 1);	1221	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1222	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1223	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1224
779	fd_change (fd);	1225	fd_change (EV_A_ fd);
780	}	1226	}
781		1227
782	void	1228	void
783	ev_io_stop (struct ev_io *w)	1229	ev_io_stop (EV_P_ struct ev_io *w)
784	{	1230	{
785	ev_clear_pending ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
787	return;	1233	return;
788		1234
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1235	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1236	ev_stop (EV_A_ (W)w);
791		1237
792	fd_change (w->fd);	1238	fd_change (EV_A_ w->fd);
793	}	1239	}
794		1240
795	void	1241	void
796	ev_timer_start (struct ev_timer *w)	1242	ev_timer_start (EV_P_ struct ev_timer *w)
797	{	1243	{
798	if (ev_is_active (w))	1244	if (ev_is_active (w))
799	return;	1245	return;
800		1246
801	w->at += now;	1247	((WT)w)->at += mn_now;
802		1248
803	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1249	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
804		1250
805	ev_start ((W)w, ++timercnt);	1251	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1252	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
807	timers [timercnt - 1] = w;	1253	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1254	upheap ((WT *)timers, timercnt - 1);
809	}
810		1255
		1256	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1257	}
		1258
811	void	1259	void
812	ev_timer_stop (struct ev_timer *w)	1260	ev_timer_stop (EV_P_ struct ev_timer *w)
813	{	1261	{
814	ev_clear_pending ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
816	return;	1264	return;
817		1265
		1266	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1267
818	if (w->active < timercnt--)	1268	if (((W)w)->active < timercnt--)
819	{	1269	{
820	timers [w->active - 1] = timers [timercnt];	1270	timers [((W)w)->active - 1] = timers [timercnt];
821	downheap ((WT *)timers, timercnt, w->active - 1);	1271	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
822	}	1272	}
823		1273
824	w->at = w->repeat;	1274	((WT)w)->at = w->repeat;
825		1275
826	ev_stop ((W)w);	1276	ev_stop (EV_A_ (W)w);
827	}	1277	}
828		1278
829	void	1279	void
830	ev_timer_again (struct ev_timer *w)	1280	ev_timer_again (EV_P_ struct ev_timer *w)
831	{	1281	{
832	if (ev_is_active (w))	1282	if (ev_is_active (w))
833	{	1283	{
834	if (w->repeat)	1284	if (w->repeat)
835	{	1285	{
836	w->at = now + w->repeat;	1286	((WT)w)->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1287	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
838	}	1288	}
839	else	1289	else
840	ev_timer_stop (w);	1290	ev_timer_stop (EV_A_ w);
841	}	1291	}
842	else if (w->repeat)	1292	else if (w->repeat)
843	ev_timer_start (w);	1293	ev_timer_start (EV_A_ w);
844	}	1294	}
845		1295
846	void	1296	void
847	ev_periodic_start (struct ev_periodic *w)	1297	ev_periodic_start (EV_P_ struct ev_periodic *w)
848	{	1298	{
849	if (ev_is_active (w))	1299	if (ev_is_active (w))
850	return;	1300	return;
851		1301
852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1302	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
853		1303
854	/* this formula differs from the one in periodic_reify because we do not always round up */	1304	/* this formula differs from the one in periodic_reify because we do not always round up */
855	if (w->interval)	1305	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1306	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
857		1307
858	ev_start ((W)w, ++periodiccnt);	1308	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1309	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
860	periodics [periodiccnt - 1] = w;	1310	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1311	upheap ((WT *)periodics, periodiccnt - 1);
862	}
863		1312
		1313	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1314	}
		1315
864	void	1316	void
865	ev_periodic_stop (struct ev_periodic *w)	1317	ev_periodic_stop (EV_P_ struct ev_periodic *w)
866	{	1318	{
867	ev_clear_pending ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1320	if (!ev_is_active (w))
869	return;	1321	return;
870		1322
		1323	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1324
871	if (w->active < periodiccnt--)	1325	if (((W)w)->active < periodiccnt--)
872	{	1326	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1327	periodics [((W)w)->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1328	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
875	}	1329	}
876		1330
877	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
878	}	1332	}
879		1333
880	void	1334	void
881	ev_signal_start (struct ev_signal *w)	1335	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1336	{
883	if (ev_is_active (w))	1337	if (ev_is_active (w))
884	return;	1338	return;
885		1339
		1340	ev_start (EV_A_ (W)w, ++idlecnt);
		1341	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1342	idles [idlecnt - 1] = w;
		1343	}
		1344
		1345	void
		1346	ev_idle_stop (EV_P_ struct ev_idle *w)
		1347	{
		1348	ev_clear_pending (EV_A_ (W)w);
		1349	if (ev_is_active (w))
		1350	return;
		1351
		1352	idles [((W)w)->active - 1] = idles [--idlecnt];
		1353	ev_stop (EV_A_ (W)w);
		1354	}
		1355
		1356	void
		1357	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1358	{
		1359	if (ev_is_active (w))
		1360	return;
		1361
		1362	ev_start (EV_A_ (W)w, ++preparecnt);
		1363	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1364	prepares [preparecnt - 1] = w;
		1365	}
		1366
		1367	void
		1368	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1369	{
		1370	ev_clear_pending (EV_A_ (W)w);
		1371	if (ev_is_active (w))
		1372	return;
		1373
		1374	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1375	ev_stop (EV_A_ (W)w);
		1376	}
		1377
		1378	void
		1379	ev_check_start (EV_P_ struct ev_check *w)
		1380	{
		1381	if (ev_is_active (w))
		1382	return;
		1383
		1384	ev_start (EV_A_ (W)w, ++checkcnt);
		1385	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1386	checks [checkcnt - 1] = w;
		1387	}
		1388
		1389	void
		1390	ev_check_stop (EV_P_ struct ev_check *w)
		1391	{
		1392	ev_clear_pending (EV_A_ (W)w);
		1393	if (ev_is_active (w))
		1394	return;
		1395
		1396	checks [((W)w)->active - 1] = checks [--checkcnt];
		1397	ev_stop (EV_A_ (W)w);
		1398	}
		1399
		1400	#ifndef SA_RESTART
		1401	# define SA_RESTART 0
		1402	#endif
		1403
		1404	void
		1405	ev_signal_start (EV_P_ struct ev_signal *w)
		1406	{
		1407	#if EV_MULTIPLICITY
		1408	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1409	#endif
		1410	if (ev_is_active (w))
		1411	return;
		1412
886	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1413	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
887		1414
888	ev_start ((W)w, 1);	1415	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1416	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1417	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1418
892	if (!w->next)	1419	if (!((WL)w)->next)
893	{	1420	{
		1421	#if WIN32
		1422	signal (w->signum, sighandler);
		1423	#else
894	struct sigaction sa;	1424	struct sigaction sa;
895	sa.sa_handler = sighandler;	1425	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1426	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1427	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1428	sigaction (w->signum, &sa, 0);
		1429	#endif
899	}	1430	}
900	}	1431	}
901		1432
902	void	1433	void
903	ev_signal_stop (struct ev_signal *w)	1434	ev_signal_stop (EV_P_ struct ev_signal *w)
904	{	1435	{
905	ev_clear_pending ((W)w);	1436	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1437	if (!ev_is_active (w))
907	return;	1438	return;
908		1439
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1440	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1441	ev_stop (EV_A_ (W)w);
911		1442
912	if (!signals [w->signum - 1].head)	1443	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1444	signal (w->signum, SIG_DFL);
914	}	1445	}
915		1446
916	void	1447	void
917	ev_idle_start (struct ev_idle *w)	1448	ev_child_start (EV_P_ struct ev_child *w)
918	{	1449	{
		1450	#if EV_MULTIPLICITY
		1451	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1452	#endif
919	if (ev_is_active (w))	1453	if (ev_is_active (w))
920	return;	1454	return;
921		1455
922	ev_start ((W)w, ++idlecnt);	1456	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	1457	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	1458	}
926		1459
927	void	1460	void
928	ev_idle_stop (struct ev_idle *w)	1461	ev_child_stop (EV_P_ struct ev_child *w)
929	{	1462	{
930	ev_clear_pending ((W)w);	1463	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1464	if (ev_is_active (w))
932	return;	1465	return;
933		1466
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);	1467	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1468	ev_stop (EV_A_ (W)w);
1001	}	1469	}
1002		1470
1003	/*****************************************************************************/	1471	/*****************************************************************************/
1004		1472
1005	struct ev_once	1473	struct ev_once
…		…
1009	void (cb)(int revents, void arg);	1477	void (cb)(int revents, void arg);
1010	void *arg;	1478	void *arg;
1011	};	1479	};
1012		1480
1013	static void	1481	static void
1014	once_cb (struct ev_once *once, int revents)	1482	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1483	{
1016	void (cb)(int revents, void arg) = once->cb;	1484	void (cb)(int revents, void arg) = once->cb;
1017	void *arg = once->arg;	1485	void *arg = once->arg;
1018		1486
1019	ev_io_stop (&once->io);	1487	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1488	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1489	ev_free (once);
1022		1490
1023	cb (revents, arg);	1491	cb (revents, arg);
1024	}	1492	}
1025		1493
1026	static void	1494	static void
1027	once_cb_io (struct ev_io *w, int revents)	1495	once_cb_io (EV_P_ struct ev_io *w, int revents)
1028	{	1496	{
1029	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1497	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1030	}	1498	}
1031		1499
1032	static void	1500	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1501	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1034	{	1502	{
1035	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1503	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1036	}	1504	}
1037		1505
1038	void	1506	void
1039	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1507	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1040	{	1508	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1509	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1042		1510
1043	if (!once)	1511	if (!once)
1044	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1512	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1045	else	1513	else
1046	{	1514	{
…		…
1049		1517
1050	ev_watcher_init (&once->io, once_cb_io);	1518	ev_watcher_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1519	if (fd >= 0)
1052	{	1520	{
1053	ev_io_set (&once->io, fd, events);	1521	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1522	ev_io_start (EV_A_ &once->io);
1055	}	1523	}
1056		1524
1057	ev_watcher_init (&once->to, once_cb_to);	1525	ev_watcher_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1526	if (timeout >= 0.)
1059	{	1527	{
1060	ev_timer_set (&once->to, timeout, 0.);	1528	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1529	ev_timer_start (EV_A_ &once->to);
1062	}	1530	}
1063	}	1531	}
1064	}	1532	}
1065		1533
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 1.75 by root, Tue Nov 6 19:29:20 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 1.75 by root, Tue Nov 6 19:29:20 2007 UTC