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

Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.71 by root, Tue Nov 6 13:17:55 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
44	#define HAVE_EPOLL 1	69	#ifndef PERL
		70	# include <signal.h>
		71	#endif
45		72
		73	#ifndef WIN32
		74	# include <unistd.h>
		75	# include <sys/time.h>
		76	# include <sys/wait.h>
		77	#endif
		78	/**/
		79
46	#ifndef HAVE_MONOTONIC	80	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	81	# define EV_USE_MONOTONIC 1
		82	#endif
		83
		84	#ifndef EV_USE_SELECT
		85	# define EV_USE_SELECT 1
		86	#endif
		87
		88	#ifndef EV_USE_POLL
		89	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		90	#endif
		91
		92	#ifndef EV_USE_EPOLL
		93	# define EV_USE_EPOLL 0
		94	#endif
		95
		96	#ifndef EV_USE_KQUEUE
		97	# define EV_USE_KQUEUE 0
		98	#endif
		99
		100	#ifndef EV_USE_WIN32
		101	# ifdef WIN32
		102	# define EV_USE_WIN32 0 /* it does not exist, use select */
		103	# undef EV_USE_SELECT
		104	# define EV_USE_SELECT 1
		105	# else
		106	# define EV_USE_WIN32 0
49	# endif	107	# endif
50	#endif	108	#endif
51		109
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	110	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	111	# define EV_USE_REALTIME 1
62	#endif	112	#endif
		113
		114	/**/
		115
		116	#ifndef CLOCK_MONOTONIC
		117	# undef EV_USE_MONOTONIC
		118	# define EV_USE_MONOTONIC 0
		119	#endif
		120
		121	#ifndef CLOCK_REALTIME
		122	# undef EV_USE_REALTIME
		123	# define EV_USE_REALTIME 0
		124	#endif
		125
		126	/**/
63		127
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	128	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	129	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		130	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		131	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
66		132
67	#include "ev.h"	133	#include "ev.h"
		134
		135	#if __GNUC__ >= 3
		136	# define expect(expr,value) __builtin_expect ((expr),(value))
		137	# define inline inline
		138	#else
		139	# define expect(expr,value) (expr)
		140	# define inline static
		141	#endif
		142
		143	#define expect_false(expr) expect ((expr) != 0, 0)
		144	#define expect_true(expr) expect ((expr) != 0, 1)
		145
		146	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		147	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
68		148
69	typedef struct ev_watcher *W;	149	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	150	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	151	typedef struct ev_watcher_time *WT;
72		152
73	static ev_tstamp now, diff; /* monotonic clock */	153	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
74	ev_tstamp ev_now;
75	int ev_method;
76		154
77	static int have_monotonic; /* runtime */	155	#if WIN32
78		156	/* note: the comment below could not be substantiated, but what would I care */
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	157	/* MSDN says this is required to handle SIGFPE */
80	static void (*method_modify)(int fd, int oev, int nev);	158	volatile double SIGFPE_REQ = 0.0f;
81	static void (*method_poll)(ev_tstamp timeout);	159	#endif
82		160
83	/*****************************************************************************/	161	/*****************************************************************************/
84		162
85	ev_tstamp	163	static void (syserr_cb)(const char msg);
		164
		165	void ev_set_syserr_cb (void (cb)(const char msg))
		166	{
		167	syserr_cb = cb;
		168	}
		169
		170	static void
		171	syserr (const char *msg)
		172	{
		173	if (!msg)
		174	msg = "(libev) system error";
		175
		176	if (syserr_cb)
		177	syserr_cb (msg);
		178	else
		179	{
		180	perror (msg);
		181	abort ();
		182	}
		183	}
		184
		185	static void (alloc)(void *ptr, long size);
		186
		187	void ev_set_allocator (void (cb)(void *ptr, long size))
		188	{
		189	alloc = cb;
		190	}
		191
		192	static void *
		193	ev_realloc (void *ptr, long size)
		194	{
		195	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		196
		197	if (!ptr && size)
		198	{
		199	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		200	abort ();
		201	}
		202
		203	return ptr;
		204	}
		205
		206	#define ev_malloc(size) ev_realloc (0, (size))
		207	#define ev_free(ptr) ev_realloc ((ptr), 0)
		208
		209	/*****************************************************************************/
		210
		211	typedef struct
		212	{
		213	WL head;
		214	unsigned char events;
		215	unsigned char reify;
		216	} ANFD;
		217
		218	typedef struct
		219	{
		220	W w;
		221	int events;
		222	} ANPENDING;
		223
		224	#if EV_MULTIPLICITY
		225
		226	struct ev_loop
		227	{
		228	# define VAR(name,decl) decl;
		229	# include "ev_vars.h"
		230	};
		231	# undef VAR
		232	# include "ev_wrap.h"
		233
		234	#else
		235
		236	# define VAR(name,decl) static decl;
		237	# include "ev_vars.h"
		238	# undef VAR
		239
		240	#endif
		241
		242	/*****************************************************************************/
		243
		244	inline ev_tstamp
86	ev_time (void)	245	ev_time (void)
87	{	246	{
88	#if HAVE_REALTIME	247	#if EV_USE_REALTIME
89	struct timespec ts;	248	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	249	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	250	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	251	#else
93	struct timeval tv;	252	struct timeval tv;
94	gettimeofday (&tv, 0);	253	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	254	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	255	#endif
97	}	256	}
98		257
99	static ev_tstamp	258	inline ev_tstamp
100	get_clock (void)	259	get_clock (void)
101	{	260	{
102	#if HAVE_MONOTONIC	261	#if EV_USE_MONOTONIC
103	if (have_monotonic)	262	if (expect_true (have_monotonic))
104	{	263	{
105	struct timespec ts;	264	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	265	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	266	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	267	}
109	#endif	268	#endif
110		269
111	return ev_time ();	270	return ev_time ();
112	}	271	}
113		272
		273	ev_tstamp
		274	ev_now (EV_P)
		275	{
		276	return rt_now;
		277	}
		278
		279	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		280
114	#define array_needsize(base,cur,cnt,init) \	281	#define array_needsize(base,cur,cnt,init) \
115	if ((cnt) > cur) \	282	if (expect_false ((cnt) > cur)) \
116	{ \	283	{ \
117	int newcnt = cur ? cur << 1 : 16; \	284	int newcnt = cur; \
		285	do \
		286	{ \
		287	newcnt = array_roundsize (base, newcnt << 1); \
		288	} \
		289	while ((cnt) > newcnt); \
		290	\
118	base = realloc (base, sizeof (base) (newcnt)); \	291	base = ev_realloc (base, sizeof (base) (newcnt)); \
119	init (base + cur, newcnt - cur); \	292	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	293	cur = newcnt; \
121	}	294	}
		295
		296	#define array_slim(stem) \
		297	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		298	{ \
		299	stem ## max = array_roundsize (stem ## cnt >> 1); \
		300	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		301	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		302	}
		303
		304	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		305	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		306	#define array_free_microshit(stem) \
		307	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		308
		309	#define array_free(stem, idx) \
		310	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
122		311
123	/*****************************************************************************/	312	/*****************************************************************************/
124		313
125	typedef struct
126	{
127	struct ev_io *head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void	314	static void
138	anfds_init (ANFD *base, int count)	315	anfds_init (ANFD *base, int count)
139	{	316	{
140	while (count--)	317	while (count--)
141	{	318	{
142	base->head = 0;	319	base->head = 0;
143	base->wev = base->rev = EV_NONE;	320	base->events = EV_NONE;
		321	base->reify = 0;
		322
144	++base;	323	++base;
145	}	324	}
146	}	325	}
147		326
148	typedef struct
149	{
150	W w;
151	int events;
152	} ANPENDING;
153
154	static ANPENDING *pendings;
155	static int pendingmax, pendingcnt;
156
157	static void	327	static void
158	event (W w, int events)	328	event (EV_P_ W w, int events)
159	{	329	{
160	if (w->active)	330	if (w->pending)
161	{	331	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	332	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		333	return;
166	}	334	}
167	}
168		335
		336	w->pending = ++pendingcnt [ABSPRI (w)];
		337	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
		338	pendings [ABSPRI (w)][w->pending - 1].w = w;
		339	pendings [ABSPRI (w)][w->pending - 1].events = events;
		340	}
		341
169	static void	342	static void
		343	queue_events (EV_P_ W *events, int eventcnt, int type)
		344	{
		345	int i;
		346
		347	for (i = 0; i < eventcnt; ++i)
		348	event (EV_A_ events [i], type);
		349	}
		350
		351	static void
170	fd_event (int fd, int events)	352	fd_event (EV_P_ int fd, int events)
171	{	353	{
172	ANFD *anfd = anfds + fd;	354	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	355	struct ev_io *w;
174		356
175	for (w = anfd->head; w; w = w->next)	357	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
176	{	358	{
177	int ev = w->events & events;	359	int ev = w->events & events;
178		360
179	if (ev)	361	if (ev)
180	event ((W)w, ev);	362	event (EV_A_ (W)w, ev);
181	}	363	}
182	}	364	}
183		365
		366	/*****************************************************************************/
		367
184	static void	368	static void
185	queue_events (W *events, int eventcnt, int type)	369	fd_reify (EV_P)
186	{	370	{
187	int i;	371	int i;
188		372
189	for (i = 0; i < eventcnt; ++i)	373	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	374	{
		375	int fd = fdchanges [i];
		376	ANFD *anfd = anfds + fd;
		377	struct ev_io *w;
		378
		379	int events = 0;
		380
		381	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		382	events \|= w->events;
		383
		384	anfd->reify = 0;
		385
		386	method_modify (EV_A_ fd, anfd->events, events);
		387	anfd->events = events;
		388	}
		389
		390	fdchangecnt = 0;
		391	}
		392
		393	static void
		394	fd_change (EV_P_ int fd)
		395	{
		396	if (anfds [fd].reify)
		397	return;
		398
		399	anfds [fd].reify = 1;
		400
		401	++fdchangecnt;
		402	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
		403	fdchanges [fdchangecnt - 1] = fd;
		404	}
		405
		406	static void
		407	fd_kill (EV_P_ int fd)
		408	{
		409	struct ev_io *w;
		410
		411	while ((w = (struct ev_io *)anfds [fd].head))
		412	{
		413	ev_io_stop (EV_A_ w);
		414	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		415	}
		416	}
		417
		418	static int
		419	fd_valid (int fd)
		420	{
		421	#ifdef WIN32
		422	return !!win32_get_osfhandle (fd);
		423	#else
		424	return fcntl (fd, F_GETFD) != -1;
		425	#endif
		426	}
		427
		428	/* called on EBADF to verify fds */
		429	static void
		430	fd_ebadf (EV_P)
		431	{
		432	int fd;
		433
		434	for (fd = 0; fd < anfdmax; ++fd)
		435	if (anfds [fd].events)
		436	if (!fd_valid (fd) == -1 && errno == EBADF)
		437	fd_kill (EV_A_ fd);
		438	}
		439
		440	/* called on ENOMEM in select/poll to kill some fds and retry */
		441	static void
		442	fd_enomem (EV_P)
		443	{
		444	int fd;
		445
		446	for (fd = anfdmax; fd--; )
		447	if (anfds [fd].events)
		448	{
		449	fd_kill (EV_A_ fd);
		450	return;
		451	}
		452	}
		453
		454	/* usually called after fork if method needs to re-arm all fds from scratch */
		455	static void
		456	fd_rearm_all (EV_P)
		457	{
		458	int fd;
		459
		460	/* this should be highly optimised to not do anything but set a flag */
		461	for (fd = 0; fd < anfdmax; ++fd)
		462	if (anfds [fd].events)
		463	{
		464	anfds [fd].events = 0;
		465	fd_change (EV_A_ fd);
		466	}
191	}	467	}
192		468
193	/*****************************************************************************/	469	/*****************************************************************************/
194		470
195	static struct ev_timer **timers;
196	static int timermax, timercnt;
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void	471	static void
202	upheap (WT *timers, int k)	472	upheap (WT *heap, int k)
203	{	473	{
204	WT w = timers [k];	474	WT w = heap [k];
205		475
206	while (k && timers [k >> 1]->at > w->at)	476	while (k && heap [k >> 1]->at > w->at)
207	{	477	{
208	timers [k] = timers [k >> 1];	478	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	479	((W)heap [k])->active = k + 1;
210	k >>= 1;	480	k >>= 1;
211	}	481	}
212		482
213	timers [k] = w;	483	heap [k] = w;
214	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
215		485
216	}	486	}
217		487
218	static void	488	static void
219	downheap (WT *timers, int N, int k)	489	downheap (WT *heap, int N, int k)
220	{	490	{
221	WT w = timers [k];	491	WT w = heap [k];
222		492
223	while (k < (N >> 1))	493	while (k < (N >> 1))
224	{	494	{
225	int j = k << 1;	495	int j = k << 1;
226		496
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	497	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	498	++j;
229		499
230	if (w->at <= timers [j]->at)	500	if (w->at <= heap [j]->at)
231	break;	501	break;
232		502
233	timers [k] = timers [j];	503	heap [k] = heap [j];
234	timers [k]->active = k + 1;	504	((W)heap [k])->active = k + 1;
235	k = j;	505	k = j;
236	}	506	}
237		507
238	timers [k] = w;	508	heap [k] = w;
239	timers [k]->active = k + 1;	509	((W)heap [k])->active = k + 1;
240	}	510	}
241		511
242	/*****************************************************************************/	512	/*****************************************************************************/
243		513
244	typedef struct	514	typedef struct
245	{	515	{
246	struct ev_signal *head;	516	WL head;
247	sig_atomic_t gotsig;	517	sig_atomic_t volatile gotsig;
248	} ANSIG;	518	} ANSIG;
249		519
250	static ANSIG *signals;	520	static ANSIG *signals;
251	static int signalmax;	521	static int signalmax;
252		522
253	static int sigpipe [2];	523	static int sigpipe [2];
254	static sig_atomic_t gotsig;	524	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	525	static struct ev_io sigev;
256		526
257	static void	527	static void
258	signals_init (ANSIG *base, int count)	528	signals_init (ANSIG *base, int count)
259	{	529	{
260	while (count--)	530	while (count--)
261	{	531	{
262	base->head = 0;	532	base->head = 0;
263	base->gotsig = 0;	533	base->gotsig = 0;
		534
264	++base;	535	++base;
265	}	536	}
266	}	537	}
267		538
268	static void	539	static void
269	sighandler (int signum)	540	sighandler (int signum)
270	{	541	{
		542	#if WIN32
		543	signal (signum, sighandler);
		544	#endif
		545
271	signals [signum - 1].gotsig = 1;	546	signals [signum - 1].gotsig = 1;
272		547
273	if (!gotsig)	548	if (!gotsig)
274	{	549	{
		550	int old_errno = errno;
275	gotsig = 1;	551	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);	552	write (sigpipe [1], &signum, 1);
		553	errno = old_errno;
277	}	554	}
278	}	555	}
279		556
280	static void	557	static void
281	sigcb (struct ev_io *iow, int revents)	558	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	559	{
283	struct ev_signal *w;	560	WL w;
284	int sig;	561	int signum;
285		562
		563	read (sigpipe [0], &revents, 1);
286	gotsig = 0;	564	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		565
289	for (sig = signalmax; sig--; )	566	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	567	if (signals [signum].gotsig)
291	{	568	{
292	signals [sig].gotsig = 0;	569	signals [signum].gotsig = 0;
293		570
294	for (w = signals [sig].head; w; w = w->next)	571	for (w = signals [signum].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);	572	event (EV_A_ (W)w, EV_SIGNAL);
296	}	573	}
297	}	574	}
298		575
299	static void	576	static void
300	siginit (void)	577	siginit (EV_P)
301	{	578	{
		579	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	580	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	581	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		582
305	/* rather than sort out wether we really need nb, set it */	583	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	584	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	585	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		586	#endif
308		587
309	evio_set (&sigev, sigpipe [0], EV_READ);	588	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	589	ev_io_start (EV_A_ &sigev);
		590	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	591	}
312		592
313	/*****************************************************************************/	593	/*****************************************************************************/
314		594
315	static struct ev_idle **idles;	595	static struct ev_child *childs [PID_HASHSIZE];
316	static int idlemax, idlecnt;
317		596
318	static struct ev_check **checks;	597	#ifndef WIN32
319	static int checkmax, checkcnt;	598
		599	static struct ev_signal childev;
		600
		601	#ifndef WCONTINUED
		602	# define WCONTINUED 0
		603	#endif
		604
		605	static void
		606	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		607	{
		608	struct ev_child *w;
		609
		610	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		611	if (w->pid == pid \|\| !w->pid)
		612	{
		613	ev_priority (w) = ev_priority (sw); /* need to do it now */
		614	w->rpid = pid;
		615	w->rstatus = status;
		616	event (EV_A_ (W)w, EV_CHILD);
		617	}
		618	}
		619
		620	static void
		621	childcb (EV_P_ struct ev_signal *sw, int revents)
		622	{
		623	int pid, status;
		624
		625	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		626	{
		627	/* make sure we are called again until all childs have been reaped */
		628	event (EV_A_ (W)sw, EV_SIGNAL);
		629
		630	child_reap (EV_A_ sw, pid, pid, status);
		631	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		632	}
		633	}
		634
		635	#endif
320		636
321	/*****************************************************************************/	637	/*****************************************************************************/
322		638
		639	#if EV_USE_KQUEUE
		640	# include "ev_kqueue.c"
		641	#endif
323	#if HAVE_EPOLL	642	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	643	# include "ev_epoll.c"
325	#endif	644	#endif
		645	#if EV_USE_POLL
		646	# include "ev_poll.c"
		647	#endif
326	#if HAVE_SELECT	648	#if EV_USE_SELECT
327	# include "ev_select.c"	649	# include "ev_select.c"
328	#endif	650	#endif
329		651
330	int ev_init (int flags)	652	int
		653	ev_version_major (void)
331	{	654	{
		655	return EV_VERSION_MAJOR;
		656	}
		657
		658	int
		659	ev_version_minor (void)
		660	{
		661	return EV_VERSION_MINOR;
		662	}
		663
		664	/* return true if we are running with elevated privileges and should ignore env variables */
		665	static int
		666	enable_secure (void)
		667	{
		668	#ifdef WIN32
		669	return 0;
		670	#else
		671	return getuid () != geteuid ()
		672	\|\| getgid () != getegid ();
		673	#endif
		674	}
		675
		676	int
		677	ev_method (EV_P)
		678	{
		679	return method;
		680	}
		681
		682	static void
		683	loop_init (EV_P_ int methods)
		684	{
		685	if (!method)
		686	{
332	#if HAVE_MONOTONIC	687	#if EV_USE_MONOTONIC
333	{	688	{
334	struct timespec ts;	689	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	690	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	691	have_monotonic = 1;
337	}	692	}
338	#endif	693	#endif
339		694
340	ev_now = ev_time ();	695	rt_now = ev_time ();
341	now = get_clock ();	696	mn_now = get_clock ();
342	diff = ev_now - now;	697	now_floor = mn_now;
		698	rtmn_diff = rt_now - mn_now;
343		699
		700	if (methods == EVMETHOD_AUTO)
		701	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		702	methods = atoi (getenv ("LIBEV_METHODS"));
		703	else
		704	methods = EVMETHOD_ANY;
		705
		706	method = 0;
		707	#if EV_USE_WIN32
		708	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		709	#endif
		710	#if EV_USE_KQUEUE
		711	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		712	#endif
		713	#if EV_USE_EPOLL
		714	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		715	#endif
		716	#if EV_USE_POLL
		717	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		718	#endif
		719	#if EV_USE_SELECT
		720	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		721	#endif
		722
		723	ev_watcher_init (&sigev, sigcb);
		724	ev_set_priority (&sigev, EV_MAXPRI);
		725	}
		726	}
		727
		728	void
		729	loop_destroy (EV_P)
		730	{
		731	int i;
		732
		733	#if EV_USE_WIN32
		734	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		735	#endif
		736	#if EV_USE_KQUEUE
		737	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		738	#endif
		739	#if EV_USE_EPOLL
		740	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		741	#endif
		742	#if EV_USE_POLL
		743	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		744	#endif
		745	#if EV_USE_SELECT
		746	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		747	#endif
		748
		749	for (i = NUMPRI; i--; )
		750	array_free (pending, [i]);
		751
		752	/* have to use the microsoft-never-gets-it-right macro */
		753	array_free_microshit (fdchange);
		754	array_free_microshit (timer);
		755	array_free_microshit (periodic);
		756	array_free_microshit (idle);
		757	array_free_microshit (prepare);
		758	array_free_microshit (check);
		759
		760	method = 0;
		761	}
		762
		763	static void
		764	loop_fork (EV_P)
		765	{
		766	#if EV_USE_EPOLL
		767	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		768	#endif
		769	#if EV_USE_KQUEUE
		770	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		771	#endif
		772
		773	if (ev_is_active (&sigev))
		774	{
		775	/* default loop */
		776
		777	ev_ref (EV_A);
		778	ev_io_stop (EV_A_ &sigev);
		779	close (sigpipe [0]);
		780	close (sigpipe [1]);
		781
		782	while (pipe (sigpipe))
		783	syserr ("(libev) error creating pipe");
		784
		785	siginit (EV_A);
		786	}
		787
		788	postfork = 0;
		789	}
		790
		791	#if EV_MULTIPLICITY
		792	struct ev_loop *
		793	ev_loop_new (int methods)
		794	{
		795	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		796
		797	memset (loop, 0, sizeof (struct ev_loop));
		798
		799	loop_init (EV_A_ methods);
		800
		801	if (ev_method (EV_A))
		802	return loop;
		803
		804	return 0;
		805	}
		806
		807	void
		808	ev_loop_destroy (EV_P)
		809	{
		810	loop_destroy (EV_A);
		811	ev_free (loop);
		812	}
		813
		814	void
		815	ev_loop_fork (EV_P)
		816	{
		817	postfork = 1;
		818	}
		819
		820	#endif
		821
		822	#if EV_MULTIPLICITY
		823	struct ev_loop default_loop_struct;
		824	static struct ev_loop *default_loop;
		825
		826	struct ev_loop *
		827	#else
		828	static int default_loop;
		829
		830	int
		831	#endif
		832	ev_default_loop (int methods)
		833	{
		834	if (sigpipe [0] == sigpipe [1])
344	if (pipe (sigpipe))	835	if (pipe (sigpipe))
345	return 0;	836	return 0;
346		837
347	ev_method = EVMETHOD_NONE;	838	if (!default_loop)
348	#if HAVE_EPOLL	839	{
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	840	#if EV_MULTIPLICITY
		841	struct ev_loop *loop = default_loop = &default_loop_struct;
		842	#else
		843	default_loop = 1;
350	#endif	844	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354		845
		846	loop_init (EV_A_ methods);
		847
		848	if (ev_method (EV_A))
		849	{
		850	siginit (EV_A);
		851
		852	#ifndef WIN32
		853	ev_signal_init (&childev, childcb, SIGCHLD);
		854	ev_set_priority (&childev, EV_MAXPRI);
		855	ev_signal_start (EV_A_ &childev);
		856	ev_unref (EV_A); /* child watcher should not keep loop alive */
		857	#endif
		858	}
		859	else
		860	default_loop = 0;
		861	}
		862
		863	return default_loop;
		864	}
		865
		866	void
		867	ev_default_destroy (void)
		868	{
		869	#if EV_MULTIPLICITY
		870	struct ev_loop *loop = default_loop;
		871	#endif
		872
		873	#ifndef WIN32
		874	ev_ref (EV_A); /* child watcher */
		875	ev_signal_stop (EV_A_ &childev);
		876	#endif
		877
		878	ev_ref (EV_A); /* signal watcher */
		879	ev_io_stop (EV_A_ &sigev);
		880
		881	close (sigpipe [0]); sigpipe [0] = 0;
		882	close (sigpipe [1]); sigpipe [1] = 0;
		883
		884	loop_destroy (EV_A);
		885	}
		886
		887	void
		888	ev_default_fork (void)
		889	{
		890	#if EV_MULTIPLICITY
		891	struct ev_loop *loop = default_loop;
		892	#endif
		893
355	if (ev_method)	894	if (method)
356	{	895	postfork = 1;
357	evw_init (&sigev, sigcb);
358	siginit ();
359	}
360
361	return ev_method;
362	}	896	}
363		897
364	/*****************************************************************************/	898	/*****************************************************************************/
365		899
366	void ev_prefork (void)
367	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif
382
383	evio_stop (&sigev);
384	close (sigpipe [0]);
385	close (sigpipe [1]);
386	pipe (sigpipe);
387	siginit ();
388	}
389
390	/*****************************************************************************/
391
392	static void	900	static void
393	fd_reify (void)	901	call_pending (EV_P)
394	{	902	{
395	int i;	903	int pri;
396		904
397	for (i = 0; i < fdchangecnt; ++i)	905	for (pri = NUMPRI; pri--; )
398	{	906	while (pendingcnt [pri])
399	int fd = fdchanges [i];
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402
403	int wev = 0;
404
405	for (w = anfd->head; w; w = w->next)
406	wev \|= w->events;
407
408	if (anfd->wev != wev)
409	{	907	{
410	method_modify (fd, anfd->wev, wev);
411	anfd->wev = wev;
412	}
413	}
414
415	fdchangecnt = 0;
416	}
417
418	static void
419	call_pending ()
420	{
421	while (pendingcnt)
422	{
423	ANPENDING *p = pendings + --pendingcnt;	908	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
424		909
425	if (p->w)	910	if (p->w)
426	{	911	{
427	p->w->pending = 0;	912	p->w->pending = 0;
428	p->w->cb (p->w, p->events);	913	p->w->cb (EV_A_ p->w, p->events);
429	}	914	}
430	}	915	}
431	}	916	}
432		917
433	static void	918	static void
434	timers_reify ()	919	timers_reify (EV_P)
435	{	920	{
436	while (timercnt && timers [0]->at <= now)	921	while (timercnt && ((WT)timers [0])->at <= mn_now)
437	{	922	{
438	struct ev_timer *w = timers [0];	923	struct ev_timer *w = timers [0];
439		924
440	event ((W)w, EV_TIMEOUT);	925	assert (("inactive timer on timer heap detected", ev_is_active (w)));
441		926
442	/* first reschedule or stop timer */	927	/* first reschedule or stop timer */
443	if (w->repeat)	928	if (w->repeat)
444	{	929	{
		930	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
445	w->at = now + w->repeat;	931	((WT)w)->at = mn_now + w->repeat;
446	assert (("timer timeout in the past, negative repeat?", w->at > now));
447	downheap ((WT *)timers, timercnt, 0);	932	downheap ((WT *)timers, timercnt, 0);
448	}	933	}
449	else	934	else
450	evtimer_stop (w); /* nonrepeating: stop timer */	935	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
451	}
452	}
453		936
		937	event (EV_A_ (W)w, EV_TIMEOUT);
		938	}
		939	}
		940
454	static void	941	static void
455	periodics_reify ()	942	periodics_reify (EV_P)
456	{	943	{
457	while (periodiccnt && periodics [0]->at <= ev_now)	944	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
458	{	945	{
459	struct ev_periodic *w = periodics [0];	946	struct ev_periodic *w = periodics [0];
		947
		948	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
460		949
461	/* first reschedule or stop timer */	950	/* first reschedule or stop timer */
462	if (w->interval)	951	if (w->interval)
463	{	952	{
464	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	953	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
465	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	954	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
466	downheap ((WT *)periodics, periodiccnt, 0);	955	downheap ((WT *)periodics, periodiccnt, 0);
467	}	956	}
468	else	957	else
469	evperiodic_stop (w); /* nonrepeating: stop timer */	958	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
470		959
471	event ((W)w, EV_TIMEOUT);	960	event (EV_A_ (W)w, EV_PERIODIC);
472	}	961	}
473	}	962	}
474		963
475	static void	964	static void
476	periodics_reschedule (ev_tstamp diff)	965	periodics_reschedule (EV_P)
477	{	966	{
478	int i;	967	int i;
479		968
480	/* adjust periodics after time jump */	969	/* adjust periodics after time jump */
481	for (i = 0; i < periodiccnt; ++i)	970	for (i = 0; i < periodiccnt; ++i)
482	{	971	{
483	struct ev_periodic *w = periodics [i];	972	struct ev_periodic *w = periodics [i];
484		973
485	if (w->interval)	974	if (w->interval)
486	{	975	{
487	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	976	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
488		977
489	if (fabs (diff) >= 1e-4)	978	if (fabs (diff) >= 1e-4)
490	{	979	{
491	evperiodic_stop (w);	980	ev_periodic_stop (EV_A_ w);
492	evperiodic_start (w);	981	ev_periodic_start (EV_A_ w);
493		982
494	i = 0; /* restart loop, inefficient, but time jumps should be rare */	983	i = 0; /* restart loop, inefficient, but time jumps should be rare */
495	}	984	}
496	}	985	}
497	}	986	}
498	}	987	}
499		988
		989	inline int
		990	time_update_monotonic (EV_P)
		991	{
		992	mn_now = get_clock ();
		993
		994	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		995	{
		996	rt_now = rtmn_diff + mn_now;
		997	return 0;
		998	}
		999	else
		1000	{
		1001	now_floor = mn_now;
		1002	rt_now = ev_time ();
		1003	return 1;
		1004	}
		1005	}
		1006
500	static void	1007	static void
501	time_update ()	1008	time_update (EV_P)
502	{	1009	{
503	int i;	1010	int i;
504		1011
505	ev_now = ev_time ();	1012	#if EV_USE_MONOTONIC
506
507	if (have_monotonic)	1013	if (expect_true (have_monotonic))
508	{	1014	{
509	ev_tstamp odiff = diff;	1015	if (time_update_monotonic (EV_A))
510
511	for (i = 4; --i; ) /* loop a few times, before making important decisions */
512	{	1016	{
513	now = get_clock ();	1017	ev_tstamp odiff = rtmn_diff;
		1018
		1019	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1020	{
514	diff = ev_now - now;	1021	rtmn_diff = rt_now - mn_now;
515		1022
516	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1023	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
517	return; /* all is well */	1024	return; /* all is well */
518		1025
519	ev_now = ev_time ();	1026	rt_now = ev_time ();
		1027	mn_now = get_clock ();
		1028	now_floor = mn_now;
		1029	}
		1030
		1031	periodics_reschedule (EV_A);
		1032	/* no timer adjustment, as the monotonic clock doesn't jump */
		1033	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
520	}	1034	}
521
522	periodics_reschedule (diff - odiff);
523	/* no timer adjustment, as the monotonic clock doesn't jump */
524	}	1035	}
525	else	1036	else
		1037	#endif
526	{	1038	{
527	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1039	rt_now = ev_time ();
		1040
		1041	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
528	{	1042	{
529	periodics_reschedule (ev_now - now);	1043	periodics_reschedule (EV_A);
530		1044
531	/* adjust timers. this is easy, as the offset is the same for all */	1045	/* adjust timers. this is easy, as the offset is the same for all */
532	for (i = 0; i < timercnt; ++i)	1046	for (i = 0; i < timercnt; ++i)
533	timers [i]->at += diff;	1047	((WT)timers [i])->at += rt_now - mn_now;
534	}	1048	}
535		1049
536	now = ev_now;	1050	mn_now = rt_now;
537	}	1051	}
538	}	1052	}
539		1053
540	int ev_loop_done;	1054	void
		1055	ev_ref (EV_P)
		1056	{
		1057	++activecnt;
		1058	}
541		1059
		1060	void
		1061	ev_unref (EV_P)
		1062	{
		1063	--activecnt;
		1064	}
		1065
		1066	static int loop_done;
		1067
		1068	void
542	void ev_loop (int flags)	1069	ev_loop (EV_P_ int flags)
543	{	1070	{
544	double block;	1071	double block;
545	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1072	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
546
547	if (checkcnt)
548	{
549	queue_events ((W *)checks, checkcnt, EV_CHECK);
550	call_pending ();
551	}
552		1073
553	do	1074	do
554	{	1075	{
		1076	/* queue check watchers (and execute them) */
		1077	if (expect_false (preparecnt))
		1078	{
		1079	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1080	call_pending (EV_A);
		1081	}
		1082
		1083	/* we might have forked, so reify kernel state if necessary */
		1084	if (expect_false (postfork))
		1085	loop_fork (EV_A);
		1086
555	/* update fd-related kernel structures */	1087	/* update fd-related kernel structures */
556	fd_reify ();	1088	fd_reify (EV_A);
557		1089
558	/* calculate blocking time */	1090	/* calculate blocking time */
559		1091
560	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1092	/* we only need this for !monotonic clockor timers, but as we basically
		1093	always have timers, we just calculate it always */
		1094	#if EV_USE_MONOTONIC
		1095	if (expect_true (have_monotonic))
		1096	time_update_monotonic (EV_A);
		1097	else
		1098	#endif
		1099	{
561	ev_now = ev_time ();	1100	rt_now = ev_time ();
		1101	mn_now = rt_now;
		1102	}
562		1103
563	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1104	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
564	block = 0.;	1105	block = 0.;
565	else	1106	else
566	{	1107	{
567	block = MAX_BLOCKTIME;	1108	block = MAX_BLOCKTIME;
568		1109
569	if (timercnt)	1110	if (timercnt)
570	{	1111	{
571	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1112	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
572	if (block > to) block = to;	1113	if (block > to) block = to;
573	}	1114	}
574		1115
575	if (periodiccnt)	1116	if (periodiccnt)
576	{	1117	{
577	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1118	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
578	if (block > to) block = to;	1119	if (block > to) block = to;
579	}	1120	}
580		1121
581	if (block < 0.) block = 0.;	1122	if (block < 0.) block = 0.;
582	}	1123	}
583		1124
584	method_poll (block);	1125	method_poll (EV_A_ block);
585		1126
586	/* update ev_now, do magic */	1127	/* update rt_now, do magic */
587	time_update ();	1128	time_update (EV_A);
588		1129
589	/* queue pending timers and reschedule them */	1130	/* queue pending timers and reschedule them */
		1131	timers_reify (EV_A); /* relative timers called last */
590	periodics_reify (); /* absolute timers first */	1132	periodics_reify (EV_A); /* absolute timers called first */
591	timers_reify (); /* relative timers second */
592		1133
593	/* queue idle watchers unless io or timers are pending */	1134	/* queue idle watchers unless io or timers are pending */
594	if (!pendingcnt)	1135	if (!pendingcnt)
595	queue_events ((W *)idles, idlecnt, EV_IDLE);	1136	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
596		1137
597	/* queue check and possibly idle watchers */	1138	/* queue check watchers, to be executed first */
		1139	if (checkcnt)
598	queue_events ((W *)checks, checkcnt, EV_CHECK);	1140	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
599		1141
600	call_pending ();	1142	call_pending (EV_A);
601	}	1143	}
602	while (!ev_loop_done);	1144	while (activecnt && !loop_done);
603		1145
604	if (ev_loop_done != 2)	1146	if (loop_done != 2)
605	ev_loop_done = 0;	1147	loop_done = 0;
		1148	}
		1149
		1150	void
		1151	ev_unloop (EV_P_ int how)
		1152	{
		1153	loop_done = how;
606	}	1154	}
607		1155
608	/*****************************************************************************/	1156	/*****************************************************************************/
609		1157
610	static void	1158	inline void
611	wlist_add (WL *head, WL elem)	1159	wlist_add (WL *head, WL elem)
612	{	1160	{
613	elem->next = *head;	1161	elem->next = *head;
614	*head = elem;	1162	*head = elem;
615	}	1163	}
616		1164
617	static void	1165	inline void
618	wlist_del (WL *head, WL elem)	1166	wlist_del (WL *head, WL elem)
619	{	1167	{
620	while (*head)	1168	while (*head)
621	{	1169	{
622	if (*head == elem)	1170	if (*head == elem)
…		…
627		1175
628	head = &(*head)->next;	1176	head = &(*head)->next;
629	}	1177	}
630	}	1178	}
631		1179
632	static void	1180	inline void
633	ev_clear (W w)	1181	ev_clear_pending (EV_P_ W w)
634	{	1182	{
635	if (w->pending)	1183	if (w->pending)
636	{	1184	{
637	pendings [w->pending - 1].w = 0;	1185	pendings [ABSPRI (w)][w->pending - 1].w = 0;
638	w->pending = 0;	1186	w->pending = 0;
639	}	1187	}
640	}	1188	}
641		1189
642	static void	1190	inline void
643	ev_start (W w, int active)	1191	ev_start (EV_P_ W w, int active)
644	{	1192	{
		1193	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1194	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1195
645	w->active = active;	1196	w->active = active;
		1197	ev_ref (EV_A);
646	}	1198	}
647		1199
648	static void	1200	inline void
649	ev_stop (W w)	1201	ev_stop (EV_P_ W w)
650	{	1202	{
		1203	ev_unref (EV_A);
651	w->active = 0;	1204	w->active = 0;
652	}	1205	}
653		1206
654	/*****************************************************************************/	1207	/*****************************************************************************/
655		1208
656	void	1209	void
657	evio_start (struct ev_io *w)	1210	ev_io_start (EV_P_ struct ev_io *w)
658	{	1211	{
		1212	int fd = w->fd;
		1213
659	if (ev_is_active (w))	1214	if (ev_is_active (w))
660	return;	1215	return;
661		1216
662	int fd = w->fd;	1217	assert (("ev_io_start called with negative fd", fd >= 0));
663		1218
664	ev_start ((W)w, 1);	1219	ev_start (EV_A_ (W)w, 1);
665	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1220	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
666	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1221	wlist_add ((WL *)&anfds[fd].head, (WL)w);
667		1222
668	++fdchangecnt;	1223	fd_change (EV_A_ fd);
669	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
670	fdchanges [fdchangecnt - 1] = fd;
671	}	1224	}
672		1225
673	void	1226	void
674	evio_stop (struct ev_io *w)	1227	ev_io_stop (EV_P_ struct ev_io *w)
675	{	1228	{
676	ev_clear ((W)w);	1229	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1230	if (!ev_is_active (w))
678	return;	1231	return;
679		1232
680	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1233	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
681	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
682		1235
683	++fdchangecnt;	1236	fd_change (EV_A_ w->fd);
684	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
685	fdchanges [fdchangecnt - 1] = w->fd;
686	}	1237	}
687		1238
688	void	1239	void
689	evtimer_start (struct ev_timer *w)	1240	ev_timer_start (EV_P_ struct ev_timer *w)
690	{	1241	{
691	if (ev_is_active (w))	1242	if (ev_is_active (w))
692	return;	1243	return;
693		1244
694	w->at += now;	1245	((WT)w)->at += mn_now;
695		1246
696	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1247	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
697		1248
698	ev_start ((W)w, ++timercnt);	1249	ev_start (EV_A_ (W)w, ++timercnt);
699	array_needsize (timers, timermax, timercnt, );	1250	array_needsize (timers, timermax, timercnt, (void));
700	timers [timercnt - 1] = w;	1251	timers [timercnt - 1] = w;
701	upheap ((WT *)timers, timercnt - 1);	1252	upheap ((WT *)timers, timercnt - 1);
702	}
703		1253
		1254	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1255	}
		1256
704	void	1257	void
705	evtimer_stop (struct ev_timer *w)	1258	ev_timer_stop (EV_P_ struct ev_timer *w)
706	{	1259	{
707	ev_clear ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
709	return;	1262	return;
710		1263
		1264	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1265
711	if (w->active < timercnt--)	1266	if (((W)w)->active < timercnt--)
712	{	1267	{
713	timers [w->active - 1] = timers [timercnt];	1268	timers [((W)w)->active - 1] = timers [timercnt];
714	downheap ((WT *)timers, timercnt, w->active - 1);	1269	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
715	}	1270	}
716		1271
717	w->at = w->repeat;	1272	((WT)w)->at = w->repeat;
718		1273
719	ev_stop ((W)w);	1274	ev_stop (EV_A_ (W)w);
720	}	1275	}
721		1276
722	void	1277	void
723	evtimer_again (struct ev_timer *w)	1278	ev_timer_again (EV_P_ struct ev_timer *w)
724	{	1279	{
725	if (ev_is_active (w))	1280	if (ev_is_active (w))
726	{	1281	{
727	if (w->repeat)	1282	if (w->repeat)
728	{	1283	{
729	w->at = now + w->repeat;	1284	((WT)w)->at = mn_now + w->repeat;
730	downheap ((WT *)timers, timercnt, w->active - 1);	1285	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1286	}
732	else	1287	else
733	evtimer_stop (w);	1288	ev_timer_stop (EV_A_ w);
734	}	1289	}
735	else if (w->repeat)	1290	else if (w->repeat)
736	evtimer_start (w);	1291	ev_timer_start (EV_A_ w);
737	}	1292	}
738		1293
739	void	1294	void
740	evperiodic_start (struct ev_periodic *w)	1295	ev_periodic_start (EV_P_ struct ev_periodic *w)
741	{	1296	{
742	if (ev_is_active (w))	1297	if (ev_is_active (w))
743	return;	1298	return;
744		1299
745	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1300	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
746		1301
747	/* this formula differs from the one in periodic_reify because we do not always round up */	1302	/* this formula differs from the one in periodic_reify because we do not always round up */
748	if (w->interval)	1303	if (w->interval)
749	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1304	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
750		1305
751	ev_start ((W)w, ++periodiccnt);	1306	ev_start (EV_A_ (W)w, ++periodiccnt);
752	array_needsize (periodics, periodicmax, periodiccnt, );	1307	array_needsize (periodics, periodicmax, periodiccnt, (void));
753	periodics [periodiccnt - 1] = w;	1308	periodics [periodiccnt - 1] = w;
754	upheap ((WT *)periodics, periodiccnt - 1);	1309	upheap ((WT *)periodics, periodiccnt - 1);
755	}
756		1310
		1311	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1312	}
		1313
757	void	1314	void
758	evperiodic_stop (struct ev_periodic *w)	1315	ev_periodic_stop (EV_P_ struct ev_periodic *w)
759	{	1316	{
760	ev_clear ((W)w);	1317	ev_clear_pending (EV_A_ (W)w);
761	if (!ev_is_active (w))	1318	if (!ev_is_active (w))
762	return;	1319	return;
763		1320
		1321	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1322
764	if (w->active < periodiccnt--)	1323	if (((W)w)->active < periodiccnt--)
765	{	1324	{
766	periodics [w->active - 1] = periodics [periodiccnt];	1325	periodics [((W)w)->active - 1] = periodics [periodiccnt];
767	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1326	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
768	}	1327	}
769		1328
770	ev_stop ((W)w);	1329	ev_stop (EV_A_ (W)w);
771	}	1330	}
772		1331
773	void	1332	void
774	evsignal_start (struct ev_signal *w)	1333	ev_idle_start (EV_P_ struct ev_idle *w)
775	{	1334	{
776	if (ev_is_active (w))	1335	if (ev_is_active (w))
777	return;	1336	return;
778		1337
		1338	ev_start (EV_A_ (W)w, ++idlecnt);
		1339	array_needsize (idles, idlemax, idlecnt, (void));
		1340	idles [idlecnt - 1] = w;
		1341	}
		1342
		1343	void
		1344	ev_idle_stop (EV_P_ struct ev_idle *w)
		1345	{
		1346	ev_clear_pending (EV_A_ (W)w);
		1347	if (ev_is_active (w))
		1348	return;
		1349
		1350	idles [((W)w)->active - 1] = idles [--idlecnt];
		1351	ev_stop (EV_A_ (W)w);
		1352	}
		1353
		1354	void
		1355	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1356	{
		1357	if (ev_is_active (w))
		1358	return;
		1359
		1360	ev_start (EV_A_ (W)w, ++preparecnt);
		1361	array_needsize (prepares, preparemax, preparecnt, (void));
		1362	prepares [preparecnt - 1] = w;
		1363	}
		1364
		1365	void
		1366	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1367	{
		1368	ev_clear_pending (EV_A_ (W)w);
		1369	if (ev_is_active (w))
		1370	return;
		1371
		1372	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1373	ev_stop (EV_A_ (W)w);
		1374	}
		1375
		1376	void
		1377	ev_check_start (EV_P_ struct ev_check *w)
		1378	{
		1379	if (ev_is_active (w))
		1380	return;
		1381
		1382	ev_start (EV_A_ (W)w, ++checkcnt);
		1383	array_needsize (checks, checkmax, checkcnt, (void));
		1384	checks [checkcnt - 1] = w;
		1385	}
		1386
		1387	void
		1388	ev_check_stop (EV_P_ struct ev_check *w)
		1389	{
		1390	ev_clear_pending (EV_A_ (W)w);
		1391	if (ev_is_active (w))
		1392	return;
		1393
		1394	checks [((W)w)->active - 1] = checks [--checkcnt];
		1395	ev_stop (EV_A_ (W)w);
		1396	}
		1397
		1398	#ifndef SA_RESTART
		1399	# define SA_RESTART 0
		1400	#endif
		1401
		1402	void
		1403	ev_signal_start (EV_P_ struct ev_signal *w)
		1404	{
		1405	#if EV_MULTIPLICITY
		1406	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1407	#endif
		1408	if (ev_is_active (w))
		1409	return;
		1410
		1411	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1412
779	ev_start ((W)w, 1);	1413	ev_start (EV_A_ (W)w, 1);
780	array_needsize (signals, signalmax, w->signum, signals_init);	1414	array_needsize (signals, signalmax, w->signum, signals_init);
781	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1415	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
782		1416
783	if (!w->next)	1417	if (!((WL)w)->next)
784	{	1418	{
		1419	#if WIN32
		1420	signal (w->signum, sighandler);
		1421	#else
785	struct sigaction sa;	1422	struct sigaction sa;
786	sa.sa_handler = sighandler;	1423	sa.sa_handler = sighandler;
787	sigfillset (&sa.sa_mask);	1424	sigfillset (&sa.sa_mask);
788	sa.sa_flags = 0;	1425	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
789	sigaction (w->signum, &sa, 0);	1426	sigaction (w->signum, &sa, 0);
		1427	#endif
790	}	1428	}
791	}	1429	}
792		1430
793	void	1431	void
794	evsignal_stop (struct ev_signal *w)	1432	ev_signal_stop (EV_P_ struct ev_signal *w)
795	{	1433	{
796	ev_clear ((W)w);	1434	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1435	if (!ev_is_active (w))
798	return;	1436	return;
799		1437
800	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1438	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
801	ev_stop ((W)w);	1439	ev_stop (EV_A_ (W)w);
802		1440
803	if (!signals [w->signum - 1].head)	1441	if (!signals [w->signum - 1].head)
804	signal (w->signum, SIG_DFL);	1442	signal (w->signum, SIG_DFL);
805	}	1443	}
806		1444
807	void evidle_start (struct ev_idle *w)	1445	void
		1446	ev_child_start (EV_P_ struct ev_child *w)
808	{	1447	{
		1448	#if EV_MULTIPLICITY
		1449	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1450	#endif
809	if (ev_is_active (w))	1451	if (ev_is_active (w))
810	return;	1452	return;
811		1453
812	ev_start ((W)w, ++idlecnt);	1454	ev_start (EV_A_ (W)w, 1);
813	array_needsize (idles, idlemax, idlecnt, );	1455	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
814	idles [idlecnt - 1] = w;
815	}	1456	}
816		1457
817	void evidle_stop (struct ev_idle *w)	1458	void
		1459	ev_child_stop (EV_P_ struct ev_child *w)
818	{	1460	{
819	ev_clear ((W)w);	1461	ev_clear_pending (EV_A_ (W)w);
820	if (ev_is_active (w))	1462	if (ev_is_active (w))
821	return;	1463	return;
822		1464
823	idles [w->active - 1] = idles [--idlecnt];	1465	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
824	ev_stop ((W)w);	1466	ev_stop (EV_A_ (W)w);
825	}
826
827	void evcheck_start (struct ev_check *w)
828	{
829	if (ev_is_active (w))
830	return;
831
832	ev_start ((W)w, ++checkcnt);
833	array_needsize (checks, checkmax, checkcnt, );
834	checks [checkcnt - 1] = w;
835	}
836
837	void evcheck_stop (struct ev_check *w)
838	{
839	ev_clear ((W)w);
840	if (ev_is_active (w))
841	return;
842
843	checks [w->active - 1] = checks [--checkcnt];
844	ev_stop ((W)w);
845	}	1467	}
846		1468
847	/*****************************************************************************/	1469	/*****************************************************************************/
848		1470
849	struct ev_once	1471	struct ev_once
…		…
853	void (cb)(int revents, void arg);	1475	void (cb)(int revents, void arg);
854	void *arg;	1476	void *arg;
855	};	1477	};
856		1478
857	static void	1479	static void
858	once_cb (struct ev_once *once, int revents)	1480	once_cb (EV_P_ struct ev_once *once, int revents)
859	{	1481	{
860	void (cb)(int revents, void arg) = once->cb;	1482	void (cb)(int revents, void arg) = once->cb;
861	void *arg = once->arg;	1483	void *arg = once->arg;
862		1484
863	evio_stop (&once->io);	1485	ev_io_stop (EV_A_ &once->io);
864	evtimer_stop (&once->to);	1486	ev_timer_stop (EV_A_ &once->to);
865	free (once);	1487	ev_free (once);
866		1488
867	cb (revents, arg);	1489	cb (revents, arg);
868	}	1490	}
869		1491
870	static void	1492	static void
871	once_cb_io (struct ev_io *w, int revents)	1493	once_cb_io (EV_P_ struct ev_io *w, int revents)
872	{	1494	{
873	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1495	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
874	}	1496	}
875		1497
876	static void	1498	static void
877	once_cb_to (struct ev_timer *w, int revents)	1499	once_cb_to (EV_P_ struct ev_timer *w, int revents)
878	{	1500	{
879	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1501	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
880	}	1502	}
881		1503
882	void	1504	void
883	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1505	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
884	{	1506	{
885	struct ev_once *once = malloc (sizeof (struct ev_once));	1507	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
886		1508
887	if (!once)	1509	if (!once)
888	cb (EV_ERROR, arg);	1510	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
889	else	1511	else
890	{	1512	{
891	once->cb = cb;	1513	once->cb = cb;
892	once->arg = arg;	1514	once->arg = arg;
893		1515
894	evw_init (&once->io, once_cb_io);	1516	ev_watcher_init (&once->io, once_cb_io);
895
896	if (fd >= 0)	1517	if (fd >= 0)
897	{	1518	{
898	evio_set (&once->io, fd, events);	1519	ev_io_set (&once->io, fd, events);
899	evio_start (&once->io);	1520	ev_io_start (EV_A_ &once->io);
900	}	1521	}
901		1522
902	evw_init (&once->to, once_cb_to);	1523	ev_watcher_init (&once->to, once_cb_to);
903
904	if (timeout >= 0.)	1524	if (timeout >= 0.)
905	{	1525	{
906	evtimer_set (&once->to, timeout, 0.);	1526	ev_timer_set (&once->to, timeout, 0.);
907	evtimer_start (&once->to);	1527	ev_timer_start (EV_A_ &once->to);
908	}	1528	}
909	}	1529	}
910	}	1530	}
911		1531
912	/*****************************************************************************/
913
914	#if 0
915
916	struct ev_io wio;
917
918	static void
919	sin_cb (struct ev_io *w, int revents)
920	{
921	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
922	}
923
924	static void
925	ocb (struct ev_timer *w, int revents)
926	{
927	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
928	evtimer_stop (w);
929	evtimer_start (w);
930	}
931
932	static void
933	scb (struct ev_signal *w, int revents)
934	{
935	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
936	evio_stop (&wio);
937	evio_start (&wio);
938	}
939
940	static void
941	gcb (struct ev_signal *w, int revents)
942	{
943	fprintf (stderr, "generic %x\n", revents);
944
945	}
946
947	int main (void)
948	{
949	ev_init (0);
950
951	evio_init (&wio, sin_cb, 0, EV_READ);
952	evio_start (&wio);
953
954	struct ev_timer t[10000];
955
956	#if 0
957	int i;
958	for (i = 0; i < 10000; ++i)
959	{
960	struct ev_timer *w = t + i;
961	evw_init (w, ocb, i);
962	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
963	evtimer_start (w);
964	if (drand48 () < 0.5)
965	evtimer_stop (w);
966	}
967	#endif
968
969	struct ev_timer t1;
970	evtimer_init (&t1, ocb, 5, 10);
971	evtimer_start (&t1);
972
973	struct ev_signal sig;
974	evsignal_init (&sig, scb, SIGQUIT);
975	evsignal_start (&sig);
976
977	struct ev_check cw;
978	evcheck_init (&cw, gcb);
979	evcheck_start (&cw);
980
981	struct ev_idle iw;
982	evidle_init (&iw, gcb);
983	evidle_start (&iw);
984
985	ev_loop (0);
986
987	return 0;
988	}
989
990	#endif
991
992
993
994

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Comparing libev/ev.c (file contents): Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs. Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC