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

Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.75 by root, Tue Nov 6 19:29:20 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (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
27	* 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.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		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
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	59	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	60	#include <stddef.h>
36		61
37	#include <stdio.h>	62	#include <stdio.h>
38		63
39	#include <assert.h>	64	#include <assert.h>
40	#include <errno.h>	65	#include <errno.h>
41	#include <sys/time.h>	66	#include <sys/types.h>
42	#include <time.h>	67	#include <time.h>
43		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
44	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
45	# ifdef CLOCK_MONOTONIC
46	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		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
47	# endif	105	# endif
48	#endif	106	#endif
49		107
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
60	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
61		125
62	#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) */
63	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
64		130
65	#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)
66		146
67	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
70		150
71	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74		152
75	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		154
81	/*****************************************************************************/	155	/*****************************************************************************/
82		156
83	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
84	ev_time (void)	239	ev_time (void)
85	{	240	{
86	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
87	struct timespec ts;	242	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	245	#else
91	struct timeval tv;	246	struct timeval tv;
92	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	249	#endif
95	}	250	}
96		251
97	static ev_tstamp	252	inline ev_tstamp
98	get_clock (void)	253	get_clock (void)
99	{	254	{
100	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
101	if (have_monotonic)	256	if (expect_true (have_monotonic))
102	{	257	{
103	struct timespec ts;	258	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	261	}
107	#endif	262	#endif
108		263
109	return ev_time ();	264	return ev_time ();
110	}	265	}
111		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		274
112	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
114	{ \	277	{ \
115	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
		279	do \
		280	{ \
		281	newcnt = array_roundsize (type, newcnt << 1); \
		282	} \
		283	while ((cnt) > newcnt); \
		284	\
116	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
117	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	287	cur = newcnt; \
119	}	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;
120		305
121	/*****************************************************************************/	306	/*****************************************************************************/
122		307
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	308	static void
136	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
137	{	310	{
138	while (count--)	311	while (count--)
139	{	312	{
140	base->head = 0;	313	base->head = 0;
141	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
142	++base;	317	++base;
143	}	318	}
144	}	319	}
145		320
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void	321	static void
156	event (W w, int events)	322	event (EV_P_ W w, int events)
157	{	323	{
158	if (w->active)	324	if (w->pending)
159	{	325	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	326	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		327	return;
164	}	328	}
165	}
166		329
		330	w->pending = ++pendingcnt [ABSPRI (w)];
		331	array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
		332	pendings [ABSPRI (w)][w->pending - 1].w = w;
		333	pendings [ABSPRI (w)][w->pending - 1].events = events;
		334	}
		335
167	static void	336	static void
		337	queue_events (EV_P_ W *events, int eventcnt, int type)
		338	{
		339	int i;
		340
		341	for (i = 0; i < eventcnt; ++i)
		342	event (EV_A_ events [i], type);
		343	}
		344
		345	static void
168	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
169	{	347	{
170	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	349	struct ev_io *w;
172		350
173	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	352	{
175	int ev = w->events & events;	353	int ev = w->events & events;
176		354
177	if (ev)	355	if (ev)
178	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
179	}	357	}
180	}	358	}
181		359
		360	/*****************************************************************************/
		361
182	static void	362	static void
183	queue_events (W *events, int eventcnt, int type)	363	fd_reify (EV_P)
184	{	364	{
185	int i;	365	int i;
186		366
187	for (i = 0; i < eventcnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	368	{
		369	int fd = fdchanges [i];
		370	ANFD *anfd = anfds + fd;
		371	struct ev_io *w;
		372
		373	int events = 0;
		374
		375	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		376	events \|= w->events;
		377
		378	anfd->reify = 0;
		379
		380	method_modify (EV_A_ fd, anfd->events, events);
		381	anfd->events = events;
		382	}
		383
		384	fdchangecnt = 0;
		385	}
		386
		387	static void
		388	fd_change (EV_P_ int fd)
		389	{
		390	if (anfds [fd].reify)
		391	return;
		392
		393	anfds [fd].reify = 1;
		394
		395	++fdchangecnt;
		396	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		397	fdchanges [fdchangecnt - 1] = fd;
		398	}
		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
189	}	420	}
190		421
191	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
192	static void	423	static void
193	fd_recheck ()	424	fd_ebadf (EV_P)
194	{	425	{
195	int fd;	426	int fd;
196		427
197	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	429	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
200	while (anfds [fd].head)	431	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	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)
		442	{
		443	fd_kill (EV_A_ fd);
		444	return;
		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	}
202	}	461	}
203		462
204	/*****************************************************************************/	463	/*****************************************************************************/
205		464
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	465	static void
213	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
214	{	467	{
215	WT w = timers [k];	468	WT w = heap [k];
216		469
217	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
218	{	471	{
219	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
221	k >>= 1;	474	k >>= 1;
222	}	475	}
223		476
224	timers [k] = w;	477	heap [k] = w;
225	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
226		479
227	}	480	}
228		481
229	static void	482	static void
230	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
231	{	484	{
232	WT w = timers [k];	485	WT w = heap [k];
233		486
234	while (k < (N >> 1))	487	while (k < (N >> 1))
235	{	488	{
236	int j = k << 1;	489	int j = k << 1;
237		490
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	492	++j;
240		493
241	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
242	break;	495	break;
243		496
244	timers [k] = timers [j];	497	heap [k] = heap [j];
245	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
246	k = j;	499	k = j;
247	}	500	}
248		501
249	timers [k] = w;	502	heap [k] = w;
250	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
251	}	504	}
252		505
253	/*****************************************************************************/	506	/*****************************************************************************/
254		507
255	typedef struct	508	typedef struct
256	{	509	{
257	struct ev_signal *head;	510	WL head;
258	sig_atomic_t gotsig;	511	sig_atomic_t volatile gotsig;
259	} ANSIG;	512	} ANSIG;
260		513
261	static ANSIG *signals;	514	static ANSIG *signals;
262	static int signalmax;	515	static int signalmax;
263		516
264	static int sigpipe [2];	517	static int sigpipe [2];
265	static sig_atomic_t gotsig;	518	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	519	static struct ev_io sigev;
267		520
268	static void	521	static void
269	signals_init (ANSIG *base, int count)	522	signals_init (ANSIG *base, int count)
270	{	523	{
271	while (count--)	524	while (count--)
272	{	525	{
273	base->head = 0;	526	base->head = 0;
274	base->gotsig = 0;	527	base->gotsig = 0;
		528
275	++base;	529	++base;
276	}	530	}
277	}	531	}
278		532
279	static void	533	static void
280	sighandler (int signum)	534	sighandler (int signum)
281	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
282	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
283		541
284	if (!gotsig)	542	if (!gotsig)
285	{	543	{
		544	int old_errno = errno;
286	gotsig = 1;	545	gotsig = 1;
		546	#ifdef WIN32
		547	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		548	#else
287	write (sigpipe [1], &gotsig, 1);	549	write (sigpipe [1], &signum, 1);
		550	#endif
		551	errno = old_errno;
288	}	552	}
289	}	553	}
290		554
291	static void	555	static void
292	sigcb (struct ev_io *iow, int revents)	556	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	557	{
294	struct ev_signal *w;	558	WL w;
295	int sig;	559	int signum;
296		560
		561	#ifdef WIN32
		562	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		563	#else
		564	read (sigpipe [0], &revents, 1);
		565	#endif
297	gotsig = 0;	566	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		567
300	for (sig = signalmax; sig--; )	568	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	569	if (signals [signum].gotsig)
302	{	570	{
303	signals [sig].gotsig = 0;	571	signals [signum].gotsig = 0;
304		572
305	for (w = signals [sig].head; w; w = w->next)	573	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	574	event (EV_A_ (W)w, EV_SIGNAL);
307	}	575	}
308	}	576	}
309		577
310	static void	578	static void
311	siginit (void)	579	siginit (EV_P)
312	{	580	{
		581	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	582	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	583	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		584
316	/* rather than sort out wether we really need nb, set it */	585	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	586	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	587	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		588	#endif
319		589
320	evio_set (&sigev, sigpipe [0], EV_READ);	590	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	591	ev_io_start (EV_A_ &sigev);
		592	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	593	}
323		594
324	/*****************************************************************************/	595	/*****************************************************************************/
325		596
326	static struct ev_idle **idles;	597	static struct ev_child *childs [PID_HASHSIZE];
327	static int idlemax, idlecnt;
328		598
329	static struct ev_check **checks;	599	#ifndef WIN32
330	static int checkmax, checkcnt;	600
		601	static struct ev_signal childev;
		602
		603	#ifndef WCONTINUED
		604	# define WCONTINUED 0
		605	#endif
		606
		607	static void
		608	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		609	{
		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	{
		625	int pid, status;
		626
		627	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		628	{
		629	/* make sure we are called again until all childs have been reaped */
		630	event (EV_A_ (W)sw, EV_SIGNAL);
		631
		632	child_reap (EV_A_ sw, pid, pid, status);
		633	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		634	}
		635	}
		636
		637	#endif
331		638
332	/*****************************************************************************/	639	/*****************************************************************************/
333		640
		641	#if EV_USE_KQUEUE
		642	# include "ev_kqueue.c"
		643	#endif
334	#if HAVE_EPOLL	644	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	645	# include "ev_epoll.c"
336	#endif	646	#endif
		647	#if EV_USE_POLL
		648	# include "ev_poll.c"
		649	#endif
337	#if HAVE_SELECT	650	#if EV_USE_SELECT
338	# include "ev_select.c"	651	# include "ev_select.c"
339	#endif	652	#endif
340		653
341	int ev_init (int flags)	654	int
		655	ev_version_major (void)
342	{	656	{
		657	return EV_VERSION_MAJOR;
		658	}
		659
		660	int
		661	ev_version_minor (void)
		662	{
		663	return EV_VERSION_MINOR;
		664	}
		665
		666	/* return true if we are running with elevated privileges and should ignore env variables */
		667	static int
		668	enable_secure (void)
		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	{
		687	if (!method)
		688	{
343	#if HAVE_MONOTONIC	689	#if EV_USE_MONOTONIC
344	{	690	{
345	struct timespec ts;	691	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	692	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	693	have_monotonic = 1;
348	}	694	}
349	#endif	695	#endif
350		696
351	ev_now = ev_time ();	697	rt_now = ev_time ();
352	now = get_clock ();	698	mn_now = get_clock ();
353	diff = ev_now - now;	699	now_floor = mn_now;
		700	rtmn_diff = rt_now - mn_now;
354		701
		702	if (methods == EVMETHOD_AUTO)
		703	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		704	methods = atoi (getenv ("LIBEV_METHODS"));
		705	else
		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
		715	#if EV_USE_EPOLL
		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);
		720	#endif
		721	#if EV_USE_SELECT
		722	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		723	#endif
		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])
355	if (pipe (sigpipe))	837	if (pipe (sigpipe))
356	return 0;	838	return 0;
357		839
358	ev_method = EVMETHOD_NONE;	840	if (!default_loop)
359	#if HAVE_EPOLL	841	{
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	842	#if EV_MULTIPLICITY
		843	struct ev_loop *loop = default_loop = &default_loop_struct;
		844	#else
		845	default_loop = 1;
361	#endif	846	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365		847
		848	loop_init (EV_A_ methods);
		849
		850	if (ev_method (EV_A))
		851	{
		852	siginit (EV_A);
		853
		854	#ifndef WIN32
		855	ev_signal_init (&childev, childcb, SIGCHLD);
		856	ev_set_priority (&childev, EV_MAXPRI);
		857	ev_signal_start (EV_A_ &childev);
		858	ev_unref (EV_A); /* child watcher should not keep loop alive */
		859	#endif
		860	}
		861	else
		862	default_loop = 0;
		863	}
		864
		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
366	if (ev_method)	896	if (method)
367	{	897	postfork = 1;
368	evw_init (&sigev, sigcb);
369	siginit ();
370	}
371
372	return ev_method;
373	}	898	}
374		899
375	/*****************************************************************************/	900	/*****************************************************************************/
376		901
377	void ev_prefork (void)
378	{
379	/* nop */
380	}
381
382	void ev_postfork_parent (void)
383	{
384	/* nop */
385	}
386
387	void ev_postfork_child (void)
388	{
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();
392	#endif
393
394	evio_stop (&sigev);
395	close (sigpipe [0]);
396	close (sigpipe [1]);
397	pipe (sigpipe);
398	siginit ();
399	}
400
401	/*****************************************************************************/
402
403	static void	902	static void
404	fd_reify (void)	903	call_pending (EV_P)
405	{	904	{
406	int i;	905	int pri;
407		906
408	for (i = 0; i < fdchangecnt; ++i)	907	for (pri = NUMPRI; pri--; )
409	{	908	while (pendingcnt [pri])
410	int fd = fdchanges [i];
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413
414	int wev = 0;
415
416	for (w = anfd->head; w; w = w->next)
417	wev \|= w->events;
418
419	if (anfd->wev != wev)
420	{	909	{
421	method_modify (fd, anfd->wev, wev);
422	anfd->wev = wev;
423	}
424	}
425
426	fdchangecnt = 0;
427	}
428
429	static void
430	call_pending ()
431	{
432	while (pendingcnt)
433	{
434	ANPENDING *p = pendings + --pendingcnt;	910	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		911
436	if (p->w)	912	if (p->w)
437	{	913	{
438	p->w->pending = 0;	914	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	915	p->w->cb (EV_A_ p->w, p->events);
440	}	916	}
441	}	917	}
442	}	918	}
443		919
444	static void	920	static void
445	timers_reify ()	921	timers_reify (EV_P)
446	{	922	{
447	while (timercnt && timers [0]->at <= now)	923	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	924	{
449	struct ev_timer *w = timers [0];	925	struct ev_timer *w = timers [0];
450		926
451	event ((W)w, EV_TIMEOUT);	927	assert (("inactive timer on timer heap detected", ev_is_active (w)));
452		928
453	/* first reschedule or stop timer */	929	/* first reschedule or stop timer */
454	if (w->repeat)	930	if (w->repeat)
455	{	931	{
		932	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	933	((WT)w)->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	934	downheap ((WT *)timers, timercnt, 0);
459	}	935	}
460	else	936	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	937	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		938
		939	event (EV_A_ (W)w, EV_TIMEOUT);
		940	}
		941	}
		942
465	static void	943	static void
466	periodics_reify ()	944	periodics_reify (EV_P)
467	{	945	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	946	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
469	{	947	{
470	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)));
471		951
472	/* first reschedule or stop timer */	952	/* first reschedule or stop timer */
473	if (w->interval)	953	if (w->interval)
474	{	954	{
475	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;
476	assert (("periodic timeout in the past, 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));
477	downheap ((WT *)periodics, periodiccnt, 0);	957	downheap ((WT *)periodics, periodiccnt, 0);
478	}	958	}
479	else	959	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	960	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		961
482	event ((W)w, EV_TIMEOUT);	962	event (EV_A_ (W)w, EV_PERIODIC);
483	}	963	}
484	}	964	}
485		965
486	static void	966	static void
487	periodics_reschedule (ev_tstamp diff)	967	periodics_reschedule (EV_P)
488	{	968	{
489	int i;	969	int i;
490		970
491	/* adjust periodics after time jump */	971	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	972	for (i = 0; i < periodiccnt; ++i)
493	{	973	{
494	struct ev_periodic *w = periodics [i];	974	struct ev_periodic *w = periodics [i];
495		975
496	if (w->interval)	976	if (w->interval)
497	{	977	{
498	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;
499		979
500	if (fabs (diff) >= 1e-4)	980	if (fabs (diff) >= 1e-4)
501	{	981	{
502	evperiodic_stop (w);	982	ev_periodic_stop (EV_A_ w);
503	evperiodic_start (w);	983	ev_periodic_start (EV_A_ w);
504		984
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	985	i = 0; /* restart loop, inefficient, but time jumps should be rare */
506	}	986	}
507	}	987	}
508	}	988	}
509	}	989	}
510		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
511	static void	1009	static void
512	time_update ()	1010	time_update (EV_P)
513	{	1011	{
514	int i;	1012	int i;
515		1013
516	ev_now = ev_time ();	1014	#if EV_USE_MONOTONIC
517
518	if (have_monotonic)	1015	if (expect_true (have_monotonic))
519	{	1016	{
520	ev_tstamp odiff = diff;	1017	if (time_update_monotonic (EV_A))
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	1018	{
524	now = get_clock ();	1019	ev_tstamp odiff = rtmn_diff;
		1020
		1021	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1022	{
525	diff = ev_now - now;	1023	rtmn_diff = rt_now - mn_now;
526		1024
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1025	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
528	return; /* all is well */	1026	return; /* all is well */
529		1027
530	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) */
531	}	1036	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}	1037	}
536	else	1038	else
		1039	#endif
537	{	1040	{
538	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))
539	{	1044	{
540	periodics_reschedule (ev_now - now);	1045	periodics_reschedule (EV_A);
541		1046
542	/* 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 */
543	for (i = 0; i < timercnt; ++i)	1048	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	1049	((WT)timers [i])->at += rt_now - mn_now;
545	}	1050	}
546		1051
547	now = ev_now;	1052	mn_now = rt_now;
548	}	1053	}
549	}	1054	}
550		1055
551	int ev_loop_done;	1056	void
		1057	ev_ref (EV_P)
		1058	{
		1059	++activecnt;
		1060	}
552		1061
		1062	void
		1063	ev_unref (EV_P)
		1064	{
		1065	--activecnt;
		1066	}
		1067
		1068	static int loop_done;
		1069
		1070	void
553	void ev_loop (int flags)	1071	ev_loop (EV_P_ int flags)
554	{	1072	{
555	double block;	1073	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1074	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
557
558	if (checkcnt)
559	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);
561	call_pending ();
562	}
563		1075
564	do	1076	do
565	{	1077	{
		1078	/* queue check watchers (and execute them) */
		1079	if (expect_false (preparecnt))
		1080	{
		1081	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1082	call_pending (EV_A);
		1083	}
		1084
		1085	/* we might have forked, so reify kernel state if necessary */
		1086	if (expect_false (postfork))
		1087	loop_fork (EV_A);
		1088
566	/* update fd-related kernel structures */	1089	/* update fd-related kernel structures */
567	fd_reify ();	1090	fd_reify (EV_A);
568		1091
569	/* calculate blocking time */	1092	/* calculate blocking time */
570		1093
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1094	/* we only need this for !monotonic clockor timers, but as we basically
		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	{
572	ev_now = ev_time ();	1102	rt_now = ev_time ();
		1103	mn_now = rt_now;
		1104	}
573		1105
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1106	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	1107	block = 0.;
576	else	1108	else
577	{	1109	{
578	block = MAX_BLOCKTIME;	1110	block = MAX_BLOCKTIME;
579		1111
580	if (timercnt)	1112	if (timercnt)
581	{	1113	{
582	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;
583	if (block > to) block = to;	1115	if (block > to) block = to;
584	}	1116	}
585		1117
586	if (periodiccnt)	1118	if (periodiccnt)
587	{	1119	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1120	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
589	if (block > to) block = to;	1121	if (block > to) block = to;
590	}	1122	}
591		1123
592	if (block < 0.) block = 0.;	1124	if (block < 0.) block = 0.;
593	}	1125	}
594		1126
595	method_poll (block);	1127	method_poll (EV_A_ block);
596		1128
597	/* update ev_now, do magic */	1129	/* update rt_now, do magic */
598	time_update ();	1130	time_update (EV_A);
599		1131
600	/* queue pending timers and reschedule them */	1132	/* queue pending timers and reschedule them */
		1133	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	1134	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		1135
604	/* queue idle watchers unless io or timers are pending */	1136	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1137	if (!pendingcnt)
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1138	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1139
608	/* queue check and possibly idle watchers */	1140	/* queue check watchers, to be executed first */
		1141	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1142	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1143
611	call_pending ();	1144	call_pending (EV_A);
612	}	1145	}
613	while (!ev_loop_done);	1146	while (activecnt && !loop_done);
614		1147
615	if (ev_loop_done != 2)	1148	if (loop_done != 2)
616	ev_loop_done = 0;	1149	loop_done = 0;
		1150	}
		1151
		1152	void
		1153	ev_unloop (EV_P_ int how)
		1154	{
		1155	loop_done = how;
617	}	1156	}
618		1157
619	/*****************************************************************************/	1158	/*****************************************************************************/
620		1159
621	static void	1160	inline void
622	wlist_add (WL *head, WL elem)	1161	wlist_add (WL *head, WL elem)
623	{	1162	{
624	elem->next = *head;	1163	elem->next = *head;
625	*head = elem;	1164	*head = elem;
626	}	1165	}
627		1166
628	static void	1167	inline void
629	wlist_del (WL *head, WL elem)	1168	wlist_del (WL *head, WL elem)
630	{	1169	{
631	while (*head)	1170	while (*head)
632	{	1171	{
633	if (*head == elem)	1172	if (*head == elem)
…		…
638		1177
639	head = &(*head)->next;	1178	head = &(*head)->next;
640	}	1179	}
641	}	1180	}
642		1181
643	static void	1182	inline void
644	ev_clear (W w)	1183	ev_clear_pending (EV_P_ W w)
645	{	1184	{
646	if (w->pending)	1185	if (w->pending)
647	{	1186	{
648	pendings [w->pending - 1].w = 0;	1187	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1188	w->pending = 0;
650	}	1189	}
651	}	1190	}
652		1191
653	static void	1192	inline void
654	ev_start (W w, int active)	1193	ev_start (EV_P_ W w, int active)
655	{	1194	{
		1195	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1196	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1197
656	w->active = active;	1198	w->active = active;
		1199	ev_ref (EV_A);
657	}	1200	}
658		1201
659	static void	1202	inline void
660	ev_stop (W w)	1203	ev_stop (EV_P_ W w)
661	{	1204	{
		1205	ev_unref (EV_A);
662	w->active = 0;	1206	w->active = 0;
663	}	1207	}
664		1208
665	/*****************************************************************************/	1209	/*****************************************************************************/
666		1210
667	void	1211	void
668	evio_start (struct ev_io *w)	1212	ev_io_start (EV_P_ struct ev_io *w)
669	{	1213	{
		1214	int fd = w->fd;
		1215
670	if (ev_is_active (w))	1216	if (ev_is_active (w))
671	return;	1217	return;
672		1218
673	int fd = w->fd;	1219	assert (("ev_io_start called with negative fd", fd >= 0));
674		1220
675	ev_start ((W)w, 1);	1221	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1222	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1223	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1224
679	++fdchangecnt;	1225	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1226	}
683		1227
684	void	1228	void
685	evio_stop (struct ev_io *w)	1229	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1230	{
687	ev_clear ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
689	return;	1233	return;
690		1234
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1235	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1236	ev_stop (EV_A_ (W)w);
693		1237
694	++fdchangecnt;	1238	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1239	}
698		1240
699	void	1241	void
700	evtimer_start (struct ev_timer *w)	1242	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1243	{
702	if (ev_is_active (w))	1244	if (ev_is_active (w))
703	return;	1245	return;
704		1246
705	w->at += now;	1247	((WT)w)->at += mn_now;
706		1248
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1249	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1250
709	ev_start ((W)w, ++timercnt);	1251	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1252	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
711	timers [timercnt - 1] = w;	1253	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1254	upheap ((WT *)timers, timercnt - 1);
713	}
714		1255
		1256	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1257	}
		1258
715	void	1259	void
716	evtimer_stop (struct ev_timer *w)	1260	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1261	{
718	ev_clear ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
720	return;	1264	return;
721		1265
		1266	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1267
722	if (w->active < timercnt--)	1268	if (((W)w)->active < timercnt--)
723	{	1269	{
724	timers [w->active - 1] = timers [timercnt];	1270	timers [((W)w)->active - 1] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1271	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
726	}	1272	}
727		1273
728	w->at = w->repeat;	1274	((WT)w)->at = w->repeat;
729		1275
730	ev_stop ((W)w);	1276	ev_stop (EV_A_ (W)w);
731	}	1277	}
732		1278
733	void	1279	void
734	evtimer_again (struct ev_timer *w)	1280	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1281	{
736	if (ev_is_active (w))	1282	if (ev_is_active (w))
737	{	1283	{
738	if (w->repeat)	1284	if (w->repeat)
739	{	1285	{
740	w->at = now + w->repeat;	1286	((WT)w)->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1287	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
742	}	1288	}
743	else	1289	else
744	evtimer_stop (w);	1290	ev_timer_stop (EV_A_ w);
745	}	1291	}
746	else if (w->repeat)	1292	else if (w->repeat)
747	evtimer_start (w);	1293	ev_timer_start (EV_A_ w);
748	}	1294	}
749		1295
750	void	1296	void
751	evperiodic_start (struct ev_periodic *w)	1297	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1298	{
753	if (ev_is_active (w))	1299	if (ev_is_active (w))
754	return;	1300	return;
755		1301
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1302	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
757		1303
758	/* 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 */
759	if (w->interval)	1305	if (w->interval)
760	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;
761		1307
762	ev_start ((W)w, ++periodiccnt);	1308	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1309	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
764	periodics [periodiccnt - 1] = w;	1310	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1311	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1312
		1313	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1314	}
		1315
768	void	1316	void
769	evperiodic_stop (struct ev_periodic *w)	1317	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1318	{
771	ev_clear ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1320	if (!ev_is_active (w))
773	return;	1321	return;
774		1322
		1323	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1324
775	if (w->active < periodiccnt--)	1325	if (((W)w)->active < periodiccnt--)
776	{	1326	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1327	periodics [((W)w)->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1328	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
779	}	1329	}
780		1330
781	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
782	}	1332	}
783		1333
784	void	1334	void
785	evsignal_start (struct ev_signal *w)	1335	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1336	{
787	if (ev_is_active (w))	1337	if (ev_is_active (w))
788	return;	1338	return;
789		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
		1413	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1414
790	ev_start ((W)w, 1);	1415	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1416	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1417	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1418
794	if (!w->next)	1419	if (!((WL)w)->next)
795	{	1420	{
		1421	#if WIN32
		1422	signal (w->signum, sighandler);
		1423	#else
796	struct sigaction sa;	1424	struct sigaction sa;
797	sa.sa_handler = sighandler;	1425	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1426	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1427	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1428	sigaction (w->signum, &sa, 0);
		1429	#endif
801	}	1430	}
802	}	1431	}
803		1432
804	void	1433	void
805	evsignal_stop (struct ev_signal *w)	1434	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1435	{
807	ev_clear ((W)w);	1436	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1437	if (!ev_is_active (w))
809	return;	1438	return;
810		1439
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1440	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1441	ev_stop (EV_A_ (W)w);
813		1442
814	if (!signals [w->signum - 1].head)	1443	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1444	signal (w->signum, SIG_DFL);
816	}	1445	}
817		1446
818	void evidle_start (struct ev_idle *w)	1447	void
		1448	ev_child_start (EV_P_ struct ev_child *w)
819	{	1449	{
		1450	#if EV_MULTIPLICITY
		1451	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1452	#endif
820	if (ev_is_active (w))	1453	if (ev_is_active (w))
821	return;	1454	return;
822		1455
823	ev_start ((W)w, ++idlecnt);	1456	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1457	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1458	}
827		1459
828	void evidle_stop (struct ev_idle *w)	1460	void
		1461	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1462	{
830	ev_clear ((W)w);	1463	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1464	if (ev_is_active (w))
832	return;	1465	return;
833		1466
834	idles [w->active - 1] = idles [--idlecnt];	1467	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1468	ev_stop (EV_A_ (W)w);
836	}
837
838	void evcheck_start (struct ev_check *w)
839	{
840	if (ev_is_active (w))
841	return;
842
843	ev_start ((W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );
845	checks [checkcnt - 1] = w;
846	}
847
848	void evcheck_stop (struct ev_check *w)
849	{
850	ev_clear ((W)w);
851	if (ev_is_active (w))
852	return;
853
854	checks [w->active - 1] = checks [--checkcnt];
855	ev_stop ((W)w);
856	}	1469	}
857		1470
858	/*****************************************************************************/	1471	/*****************************************************************************/
859		1472
860	struct ev_once	1473	struct ev_once
…		…
864	void (cb)(int revents, void arg);	1477	void (cb)(int revents, void arg);
865	void *arg;	1478	void *arg;
866	};	1479	};
867		1480
868	static void	1481	static void
869	once_cb (struct ev_once *once, int revents)	1482	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1483	{
871	void (cb)(int revents, void arg) = once->cb;	1484	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	1485	void *arg = once->arg;
873		1486
874	evio_stop (&once->io);	1487	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1488	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1489	ev_free (once);
877		1490
878	cb (revents, arg);	1491	cb (revents, arg);
879	}	1492	}
880		1493
881	static void	1494	static void
882	once_cb_io (struct ev_io *w, int revents)	1495	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1496	{
884	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);
885	}	1498	}
886		1499
887	static void	1500	static void
888	once_cb_to (struct ev_timer *w, int revents)	1501	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1502	{
890	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);
891	}	1504	}
892		1505
893	void	1506	void
894	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)
895	{	1508	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1509	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
897		1510
898	if (!once)	1511	if (!once)
899	cb (EV_ERROR, arg);	1512	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
900	else	1513	else
901	{	1514	{
902	once->cb = cb;	1515	once->cb = cb;
903	once->arg = arg;	1516	once->arg = arg;
904		1517
905	evw_init (&once->io, once_cb_io);	1518	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1519	if (fd >= 0)
908	{	1520	{
909	evio_set (&once->io, fd, events);	1521	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1522	ev_io_start (EV_A_ &once->io);
911	}	1523	}
912		1524
913	evw_init (&once->to, once_cb_to);	1525	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1526	if (timeout >= 0.)
916	{	1527	{
917	evtimer_set (&once->to, timeout, 0.);	1528	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1529	ev_timer_start (EV_A_ &once->to);
919	}	1530	}
920	}	1531	}
921	}	1532	}
922		1533
923	/*****************************************************************************/
924
925	#if 0
926
927	struct ev_io wio;
928
929	static void
930	sin_cb (struct ev_io *w, int revents)
931	{
932	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933	}
934
935	static void
936	ocb (struct ev_timer *w, int revents)
937	{
938	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939	evtimer_stop (w);
940	evtimer_start (w);
941	}
942
943	static void
944	scb (struct ev_signal *w, int revents)
945	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);
948	evio_start (&wio);
949	}
950
951	static void
952	gcb (struct ev_signal *w, int revents)
953	{
954	fprintf (stderr, "generic %x\n", revents);
955
956	}
957
958	int main (void)
959	{
960	ev_init (0);
961
962	evio_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);
964
965	struct ev_timer t[10000];
966
967	#if 0
968	int i;
969	for (i = 0; i < 10000; ++i)
970	{
971	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);
975	if (drand48 () < 0.5)
976	evtimer_stop (w);
977	}
978	#endif
979
980	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);
983
984	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);
987
988	struct ev_check cw;
989	evcheck_init (&cw, gcb);
990	evcheck_start (&cw);
991
992	struct ev_idle iw;
993	evidle_init (&iw, gcb);
994	evidle_start (&iw);
995
996	ev_loop (0);
997
998	return 0;
999	}
1000
1001	#endif
1002
1003
1004
1005

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Comparing libev/ev.c (file contents): Revision 1.19 by root, Wed Oct 31 17:55:55 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 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.75 by root, Tue Nov 6 19:29:20 2007 UTC