[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 1.72 by root, Tue Nov 6 16:09:37 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	#if WIN32
		154	/* note: the comment below could not be substantiated, but what would I care */
		155	/* MSDN says this is required to handle SIGFPE */
		156	volatile double SIGFPE_REQ = 0.0f;
76		157
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	158	static int
78	static void (*method_modify)(int fd, int oev, int nev);	159	ev_socketpair_tcp (int filedes [2])
79	static void (*method_poll)(ev_tstamp timeout);	160	{
		161	struct sockaddr_in addr = { 0 };
		162	int addr_size = sizeof (addr);
		163	SOCKET listener;
		164	SOCKET sock [2] = { -1, -1 };
		165
		166	if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
		167	return -1;
		168
		169	addr.sin_family = AF_INET;
		170	addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
		171	addr.sin_port = 0;
		172
		173	if (bind (listener, (struct sockaddr *)&addr, addr_size))
		174	goto fail;
		175
		176	if (getsockname(listener, (struct sockaddr *)&addr, &addr_size))
		177	goto fail;
		178
		179	if (listen (listener, 1))
		180	goto fail;
		181
		182	if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
		183	goto fail;
		184
		185	if (connect (sock[0], (struct sockaddr *)&addr, addr_size))
		186	goto fail;
		187
		188	if ((sock[1] = accept (listener, 0, 0)) < 0)
		189	goto fail;
		190
		191	closesocket (listener);
		192
		193	filedes [0] = sock [0];
		194	filedes [1] = sock [1];
		195
		196	return 0;
		197
		198	fail:
		199	closesocket (listener);
		200
		201	if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
		202	if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
		203
		204	return -1;
		205	}
		206
		207	# define ev_pipe(filedes) ev_socketpair_tcp (filedes)
		208	#else
		209	# define ev_pipe(filedes) pipe (filedes)
		210	#endif
80		211
81	/*****************************************************************************/	212	/*****************************************************************************/
82		213
83	ev_tstamp	214	static void (syserr_cb)(const char msg);
		215
		216	void ev_set_syserr_cb (void (cb)(const char msg))
		217	{
		218	syserr_cb = cb;
		219	}
		220
		221	static void
		222	syserr (const char *msg)
		223	{
		224	if (!msg)
		225	msg = "(libev) system error";
		226
		227	if (syserr_cb)
		228	syserr_cb (msg);
		229	else
		230	{
		231	perror (msg);
		232	abort ();
		233	}
		234	}
		235
		236	static void (alloc)(void *ptr, long size);
		237
		238	void ev_set_allocator (void (cb)(void *ptr, long size))
		239	{
		240	alloc = cb;
		241	}
		242
		243	static void *
		244	ev_realloc (void *ptr, long size)
		245	{
		246	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		247
		248	if (!ptr && size)
		249	{
		250	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		251	abort ();
		252	}
		253
		254	return ptr;
		255	}
		256
		257	#define ev_malloc(size) ev_realloc (0, (size))
		258	#define ev_free(ptr) ev_realloc ((ptr), 0)
		259
		260	/*****************************************************************************/
		261
		262	typedef struct
		263	{
		264	WL head;
		265	unsigned char events;
		266	unsigned char reify;
		267	} ANFD;
		268
		269	typedef struct
		270	{
		271	W w;
		272	int events;
		273	} ANPENDING;
		274
		275	#if EV_MULTIPLICITY
		276
		277	struct ev_loop
		278	{
		279	# define VAR(name,decl) decl;
		280	# include "ev_vars.h"
		281	};
		282	# undef VAR
		283	# include "ev_wrap.h"
		284
		285	#else
		286
		287	# define VAR(name,decl) static decl;
		288	# include "ev_vars.h"
		289	# undef VAR
		290
		291	#endif
		292
		293	/*****************************************************************************/
		294
		295	inline ev_tstamp
84	ev_time (void)	296	ev_time (void)
85	{	297	{
86	#if HAVE_REALTIME	298	#if EV_USE_REALTIME
87	struct timespec ts;	299	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	300	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	301	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	302	#else
91	struct timeval tv;	303	struct timeval tv;
92	gettimeofday (&tv, 0);	304	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	305	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	306	#endif
95	}	307	}
96		308
97	static ev_tstamp	309	inline ev_tstamp
98	get_clock (void)	310	get_clock (void)
99	{	311	{
100	#if HAVE_MONOTONIC	312	#if EV_USE_MONOTONIC
101	if (have_monotonic)	313	if (expect_true (have_monotonic))
102	{	314	{
103	struct timespec ts;	315	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	316	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	317	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	318	}
107	#endif	319	#endif
108		320
109	return ev_time ();	321	return ev_time ();
110	}	322	}
111		323
		324	ev_tstamp
		325	ev_now (EV_P)
		326	{
		327	return rt_now;
		328	}
		329
		330	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		331
112	#define array_needsize(base,cur,cnt,init) \	332	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	333	if (expect_false ((cnt) > cur)) \
114	{ \	334	{ \
115	int newcnt = cur ? cur << 1 : 16; \	335	int newcnt = cur; \
		336	do \
		337	{ \
		338	newcnt = array_roundsize (base, newcnt << 1); \
		339	} \
		340	while ((cnt) > newcnt); \
		341	\
116	base = realloc (base, sizeof (base) (newcnt)); \	342	base = ev_realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	343	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	344	cur = newcnt; \
119	}	345	}
		346
		347	#define array_slim(stem) \
		348	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		349	{ \
		350	stem ## max = array_roundsize (stem ## cnt >> 1); \
		351	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		352	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		353	}
		354
		355	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		356	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		357	#define array_free_microshit(stem) \
		358	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		359
		360	#define array_free(stem, idx) \
		361	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		362
121	/*****************************************************************************/	363	/*****************************************************************************/
122		364
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	365	static void
136	anfds_init (ANFD *base, int count)	366	anfds_init (ANFD *base, int count)
137	{	367	{
138	while (count--)	368	while (count--)
139	{	369	{
140	base->head = 0;	370	base->head = 0;
141	base->wev = base->rev = EV_NONE;	371	base->events = EV_NONE;
		372	base->reify = 0;
		373
142	++base;	374	++base;
143	}	375	}
144	}	376	}
145		377
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	378	static void
156	event (W w, int events)	379	event (EV_P_ W w, int events)
157	{	380	{
158	if (w->active)	381	if (w->pending)
159	{	382	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	383	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		384	return;
164	}	385	}
165	}
166		386
		387	w->pending = ++pendingcnt [ABSPRI (w)];
		388	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
		389	pendings [ABSPRI (w)][w->pending - 1].w = w;
		390	pendings [ABSPRI (w)][w->pending - 1].events = events;
		391	}
		392
167	static void	393	static void
		394	queue_events (EV_P_ W *events, int eventcnt, int type)
		395	{
		396	int i;
		397
		398	for (i = 0; i < eventcnt; ++i)
		399	event (EV_A_ events [i], type);
		400	}
		401
		402	static void
168	fd_event (int fd, int events)	403	fd_event (EV_P_ int fd, int events)
169	{	404	{
170	ANFD *anfd = anfds + fd;	405	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	406	struct ev_io *w;
172		407
173	for (w = anfd->head; w; w = w->next)	408	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	409	{
175	int ev = w->events & events;	410	int ev = w->events & events;
176		411
177	if (ev)	412	if (ev)
178	event ((W)w, ev);	413	event (EV_A_ (W)w, ev);
179	}	414	}
180	}	415	}
181		416
		417	/*****************************************************************************/
		418
182	static void	419	static void
183	queue_events (W *events, int eventcnt, int type)	420	fd_reify (EV_P)
184	{	421	{
185	int i;	422	int i;
186		423
187	for (i = 0; i < eventcnt; ++i)	424	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	425	{
		426	int fd = fdchanges [i];
		427	ANFD *anfd = anfds + fd;
		428	struct ev_io *w;
		429
		430	int events = 0;
		431
		432	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		433	events \|= w->events;
		434
		435	anfd->reify = 0;
		436
		437	method_modify (EV_A_ fd, anfd->events, events);
		438	anfd->events = events;
		439	}
		440
		441	fdchangecnt = 0;
		442	}
		443
		444	static void
		445	fd_change (EV_P_ int fd)
		446	{
		447	if (anfds [fd].reify)
		448	return;
		449
		450	anfds [fd].reify = 1;
		451
		452	++fdchangecnt;
		453	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
		454	fdchanges [fdchangecnt - 1] = fd;
		455	}
		456
		457	static void
		458	fd_kill (EV_P_ int fd)
		459	{
		460	struct ev_io *w;
		461
		462	while ((w = (struct ev_io *)anfds [fd].head))
		463	{
		464	ev_io_stop (EV_A_ w);
		465	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		466	}
		467	}
		468
		469	static int
		470	fd_valid (int fd)
		471	{
		472	#ifdef WIN32
		473	return !!win32_get_osfhandle (fd);
		474	#else
		475	return fcntl (fd, F_GETFD) != -1;
		476	#endif
189	}	477	}
190		478
191	/* called on EBADF to verify fds */	479	/* called on EBADF to verify fds */
192	static void	480	static void
193	fd_recheck ()	481	fd_ebadf (EV_P)
194	{	482	{
195	int fd;	483	int fd;
196		484
197	for (fd = 0; fd < anfdmax; ++fd)	485	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	486	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	487	if (!fd_valid (fd) == -1 && errno == EBADF)
200	while (anfds [fd].head)	488	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	489	}
		490
		491	/* called on ENOMEM in select/poll to kill some fds and retry */
		492	static void
		493	fd_enomem (EV_P)
		494	{
		495	int fd;
		496
		497	for (fd = anfdmax; fd--; )
		498	if (anfds [fd].events)
		499	{
		500	fd_kill (EV_A_ fd);
		501	return;
		502	}
		503	}
		504
		505	/* usually called after fork if method needs to re-arm all fds from scratch */
		506	static void
		507	fd_rearm_all (EV_P)
		508	{
		509	int fd;
		510
		511	/* this should be highly optimised to not do anything but set a flag */
		512	for (fd = 0; fd < anfdmax; ++fd)
		513	if (anfds [fd].events)
		514	{
		515	anfds [fd].events = 0;
		516	fd_change (EV_A_ fd);
		517	}
202	}	518	}
203		519
204	/*****************************************************************************/	520	/*****************************************************************************/
205		521
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	522	static void
213	upheap (WT *timers, int k)	523	upheap (WT *heap, int k)
214	{	524	{
215	WT w = timers [k];	525	WT w = heap [k];
216		526
217	while (k && timers [k >> 1]->at > w->at)	527	while (k && heap [k >> 1]->at > w->at)
218	{	528	{
219	timers [k] = timers [k >> 1];	529	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	530	((W)heap [k])->active = k + 1;
221	k >>= 1;	531	k >>= 1;
222	}	532	}
223		533
224	timers [k] = w;	534	heap [k] = w;
225	timers [k]->active = k + 1;	535	((W)heap [k])->active = k + 1;
226		536
227	}	537	}
228		538
229	static void	539	static void
230	downheap (WT *timers, int N, int k)	540	downheap (WT *heap, int N, int k)
231	{	541	{
232	WT w = timers [k];	542	WT w = heap [k];
233		543
234	while (k < (N >> 1))	544	while (k < (N >> 1))
235	{	545	{
236	int j = k << 1;	546	int j = k << 1;
237		547
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	548	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	549	++j;
240		550
241	if (w->at <= timers [j]->at)	551	if (w->at <= heap [j]->at)
242	break;	552	break;
243		553
244	timers [k] = timers [j];	554	heap [k] = heap [j];
245	timers [k]->active = k + 1;	555	((W)heap [k])->active = k + 1;
246	k = j;	556	k = j;
247	}	557	}
248		558
249	timers [k] = w;	559	heap [k] = w;
250	timers [k]->active = k + 1;	560	((W)heap [k])->active = k + 1;
251	}	561	}
252		562
253	/*****************************************************************************/	563	/*****************************************************************************/
254		564
255	typedef struct	565	typedef struct
256	{	566	{
257	struct ev_signal *head;	567	WL head;
258	sig_atomic_t gotsig;	568	sig_atomic_t volatile gotsig;
259	} ANSIG;	569	} ANSIG;
260		570
261	static ANSIG *signals;	571	static ANSIG *signals;
262	static int signalmax;	572	static int signalmax;
263		573
264	static int sigpipe [2];	574	static int sigpipe [2];
265	static sig_atomic_t gotsig;	575	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	576	static struct ev_io sigev;
267		577
268	static void	578	static void
269	signals_init (ANSIG *base, int count)	579	signals_init (ANSIG *base, int count)
270	{	580	{
271	while (count--)	581	while (count--)
272	{	582	{
273	base->head = 0;	583	base->head = 0;
274	base->gotsig = 0;	584	base->gotsig = 0;
		585
275	++base;	586	++base;
276	}	587	}
277	}	588	}
278		589
279	static void	590	static void
280	sighandler (int signum)	591	sighandler (int signum)
281	{	592	{
		593	#if WIN32
		594	signal (signum, sighandler);
		595	#endif
		596
282	signals [signum - 1].gotsig = 1;	597	signals [signum - 1].gotsig = 1;
283		598
284	if (!gotsig)	599	if (!gotsig)
285	{	600	{
		601	int old_errno = errno;
286	gotsig = 1;	602	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	603	write (sigpipe [1], &signum, 1);
		604	errno = old_errno;
288	}	605	}
289	}	606	}
290		607
291	static void	608	static void
292	sigcb (struct ev_io *iow, int revents)	609	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	610	{
294	struct ev_signal *w;	611	WL w;
295	int sig;	612	int signum;
296		613
		614	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	615	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		616
300	for (sig = signalmax; sig--; )	617	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	618	if (signals [signum].gotsig)
302	{	619	{
303	signals [sig].gotsig = 0;	620	signals [signum].gotsig = 0;
304		621
305	for (w = signals [sig].head; w; w = w->next)	622	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	623	event (EV_A_ (W)w, EV_SIGNAL);
307	}	624	}
308	}	625	}
309		626
310	static void	627	static void
311	siginit (void)	628	siginit (EV_P)
312	{	629	{
		630	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	631	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	632	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		633
316	/* rather than sort out wether we really need nb, set it */	634	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	635	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	636	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		637	#endif
319		638
320	evio_set (&sigev, sigpipe [0], EV_READ);	639	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	640	ev_io_start (EV_A_ &sigev);
		641	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	642	}
323		643
324	/*****************************************************************************/	644	/*****************************************************************************/
325		645
326	static struct ev_idle **idles;	646	static struct ev_child *childs [PID_HASHSIZE];
327	static int idlemax, idlecnt;
328		647
329	static struct ev_check **checks;	648	#ifndef WIN32
330	static int checkmax, checkcnt;	649
		650	static struct ev_signal childev;
		651
		652	#ifndef WCONTINUED
		653	# define WCONTINUED 0
		654	#endif
		655
		656	static void
		657	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		658	{
		659	struct ev_child *w;
		660
		661	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		662	if (w->pid == pid \|\| !w->pid)
		663	{
		664	ev_priority (w) = ev_priority (sw); /* need to do it now */
		665	w->rpid = pid;
		666	w->rstatus = status;
		667	event (EV_A_ (W)w, EV_CHILD);
		668	}
		669	}
		670
		671	static void
		672	childcb (EV_P_ struct ev_signal *sw, int revents)
		673	{
		674	int pid, status;
		675
		676	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		677	{
		678	/* make sure we are called again until all childs have been reaped */
		679	event (EV_A_ (W)sw, EV_SIGNAL);
		680
		681	child_reap (EV_A_ sw, pid, pid, status);
		682	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		683	}
		684	}
		685
		686	#endif
331		687
332	/*****************************************************************************/	688	/*****************************************************************************/
333		689
		690	#if EV_USE_KQUEUE
		691	# include "ev_kqueue.c"
		692	#endif
334	#if HAVE_EPOLL	693	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	694	# include "ev_epoll.c"
336	#endif	695	#endif
		696	#if EV_USE_POLL
		697	# include "ev_poll.c"
		698	#endif
337	#if HAVE_SELECT	699	#if EV_USE_SELECT
338	# include "ev_select.c"	700	# include "ev_select.c"
339	#endif	701	#endif
340		702
341	int ev_init (int flags)	703	int
		704	ev_version_major (void)
342	{	705	{
		706	return EV_VERSION_MAJOR;
		707	}
		708
		709	int
		710	ev_version_minor (void)
		711	{
		712	return EV_VERSION_MINOR;
		713	}
		714
		715	/* return true if we are running with elevated privileges and should ignore env variables */
		716	static int
		717	enable_secure (void)
		718	{
		719	#ifdef WIN32
		720	return 0;
		721	#else
		722	return getuid () != geteuid ()
		723	\|\| getgid () != getegid ();
		724	#endif
		725	}
		726
		727	int
		728	ev_method (EV_P)
		729	{
		730	return method;
		731	}
		732
		733	static void
		734	loop_init (EV_P_ int methods)
		735	{
		736	if (!method)
		737	{
343	#if HAVE_MONOTONIC	738	#if EV_USE_MONOTONIC
344	{	739	{
345	struct timespec ts;	740	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	741	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	742	have_monotonic = 1;
348	}	743	}
349	#endif	744	#endif
350		745
351	ev_now = ev_time ();	746	rt_now = ev_time ();
352	now = get_clock ();	747	mn_now = get_clock ();
353	diff = ev_now - now;	748	now_floor = mn_now;
		749	rtmn_diff = rt_now - mn_now;
354		750
		751	if (methods == EVMETHOD_AUTO)
		752	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		753	methods = atoi (getenv ("LIBEV_METHODS"));
		754	else
		755	methods = EVMETHOD_ANY;
		756
		757	method = 0;
		758	#if EV_USE_WIN32
		759	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		760	#endif
		761	#if EV_USE_KQUEUE
		762	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		763	#endif
		764	#if EV_USE_EPOLL
		765	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		766	#endif
		767	#if EV_USE_POLL
		768	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		769	#endif
		770	#if EV_USE_SELECT
		771	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		772	#endif
		773
		774	ev_watcher_init (&sigev, sigcb);
		775	ev_set_priority (&sigev, EV_MAXPRI);
		776	}
		777	}
		778
		779	void
		780	loop_destroy (EV_P)
		781	{
		782	int i;
		783
		784	#if EV_USE_WIN32
		785	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		786	#endif
		787	#if EV_USE_KQUEUE
		788	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		789	#endif
		790	#if EV_USE_EPOLL
		791	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		792	#endif
		793	#if EV_USE_POLL
		794	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		795	#endif
		796	#if EV_USE_SELECT
		797	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		798	#endif
		799
		800	for (i = NUMPRI; i--; )
		801	array_free (pending, [i]);
		802
		803	/* have to use the microsoft-never-gets-it-right macro */
		804	array_free_microshit (fdchange);
		805	array_free_microshit (timer);
		806	array_free_microshit (periodic);
		807	array_free_microshit (idle);
		808	array_free_microshit (prepare);
		809	array_free_microshit (check);
		810
		811	method = 0;
		812	}
		813
		814	static void
		815	loop_fork (EV_P)
		816	{
		817	#if EV_USE_EPOLL
		818	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		819	#endif
		820	#if EV_USE_KQUEUE
		821	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		822	#endif
		823
		824	if (ev_is_active (&sigev))
		825	{
		826	/* default loop */
		827
		828	ev_ref (EV_A);
		829	ev_io_stop (EV_A_ &sigev);
		830	close (sigpipe [0]);
		831	close (sigpipe [1]);
		832
		833	while (ev_pipe (sigpipe))
		834	syserr ("(libev) error creating pipe");
		835
		836	siginit (EV_A);
		837	}
		838
		839	postfork = 0;
		840	}
		841
		842	#if EV_MULTIPLICITY
		843	struct ev_loop *
		844	ev_loop_new (int methods)
		845	{
		846	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		847
		848	memset (loop, 0, sizeof (struct ev_loop));
		849
		850	loop_init (EV_A_ methods);
		851
		852	if (ev_method (EV_A))
		853	return loop;
		854
		855	return 0;
		856	}
		857
		858	void
		859	ev_loop_destroy (EV_P)
		860	{
		861	loop_destroy (EV_A);
		862	ev_free (loop);
		863	}
		864
		865	void
		866	ev_loop_fork (EV_P)
		867	{
		868	postfork = 1;
		869	}
		870
		871	#endif
		872
		873	#if EV_MULTIPLICITY
		874	struct ev_loop default_loop_struct;
		875	static struct ev_loop *default_loop;
		876
		877	struct ev_loop *
		878	#else
		879	static int default_loop;
		880
		881	int
		882	#endif
		883	ev_default_loop (int methods)
		884	{
		885	if (sigpipe [0] == sigpipe [1])
355	if (pipe (sigpipe))	886	if (ev_pipe (sigpipe))
356	return 0;	887	return 0;
357		888
358	ev_method = EVMETHOD_NONE;	889	if (!default_loop)
359	#if HAVE_EPOLL	890	{
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	891	#if EV_MULTIPLICITY
		892	struct ev_loop *loop = default_loop = &default_loop_struct;
		893	#else
		894	default_loop = 1;
361	#endif	895	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365		896
		897	loop_init (EV_A_ methods);
		898
		899	if (ev_method (EV_A))
		900	{
		901	siginit (EV_A);
		902
		903	#ifndef WIN32
		904	ev_signal_init (&childev, childcb, SIGCHLD);
		905	ev_set_priority (&childev, EV_MAXPRI);
		906	ev_signal_start (EV_A_ &childev);
		907	ev_unref (EV_A); /* child watcher should not keep loop alive */
		908	#endif
		909	}
		910	else
		911	default_loop = 0;
		912	}
		913
		914	return default_loop;
		915	}
		916
		917	void
		918	ev_default_destroy (void)
		919	{
		920	#if EV_MULTIPLICITY
		921	struct ev_loop *loop = default_loop;
		922	#endif
		923
		924	#ifndef WIN32
		925	ev_ref (EV_A); /* child watcher */
		926	ev_signal_stop (EV_A_ &childev);
		927	#endif
		928
		929	ev_ref (EV_A); /* signal watcher */
		930	ev_io_stop (EV_A_ &sigev);
		931
		932	close (sigpipe [0]); sigpipe [0] = 0;
		933	close (sigpipe [1]); sigpipe [1] = 0;
		934
		935	loop_destroy (EV_A);
		936	}
		937
		938	void
		939	ev_default_fork (void)
		940	{
		941	#if EV_MULTIPLICITY
		942	struct ev_loop *loop = default_loop;
		943	#endif
		944
366	if (ev_method)	945	if (method)
367	{	946	postfork = 1;
368	evw_init (&sigev, sigcb);
369	siginit ();
370	}
371
372	return ev_method;
373	}	947	}
374		948
375	/*****************************************************************************/	949	/*****************************************************************************/
376		950
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	951	static void
404	fd_reify (void)	952	call_pending (EV_P)
405	{	953	{
406	int i;	954	int pri;
407		955
408	for (i = 0; i < fdchangecnt; ++i)	956	for (pri = NUMPRI; pri--; )
409	{	957	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	{	958	{
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;	959	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		960
436	if (p->w)	961	if (p->w)
437	{	962	{
438	p->w->pending = 0;	963	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	964	p->w->cb (EV_A_ p->w, p->events);
440	}	965	}
441	}	966	}
442	}	967	}
443		968
444	static void	969	static void
445	timers_reify ()	970	timers_reify (EV_P)
446	{	971	{
447	while (timercnt && timers [0]->at <= now)	972	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	973	{
449	struct ev_timer *w = timers [0];	974	struct ev_timer *w = timers [0];
450		975
451	event ((W)w, EV_TIMEOUT);	976	assert (("inactive timer on timer heap detected", ev_is_active (w)));
452		977
453	/* first reschedule or stop timer */	978	/* first reschedule or stop timer */
454	if (w->repeat)	979	if (w->repeat)
455	{	980	{
		981	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	982	((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);	983	downheap ((WT *)timers, timercnt, 0);
459	}	984	}
460	else	985	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	986	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		987
		988	event (EV_A_ (W)w, EV_TIMEOUT);
		989	}
		990	}
		991
465	static void	992	static void
466	periodics_reify ()	993	periodics_reify (EV_P)
467	{	994	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	995	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
469	{	996	{
470	struct ev_periodic *w = periodics [0];	997	struct ev_periodic *w = periodics [0];
		998
		999	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
471		1000
472	/* first reschedule or stop timer */	1001	/* first reschedule or stop timer */
473	if (w->interval)	1002	if (w->interval)
474	{	1003	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1004	((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));	1005	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	1006	downheap ((WT *)periodics, periodiccnt, 0);
478	}	1007	}
479	else	1008	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	1009	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		1010
482	event ((W)w, EV_TIMEOUT);	1011	event (EV_A_ (W)w, EV_PERIODIC);
483	}	1012	}
484	}	1013	}
485		1014
486	static void	1015	static void
487	periodics_reschedule (ev_tstamp diff)	1016	periodics_reschedule (EV_P)
488	{	1017	{
489	int i;	1018	int i;
490		1019
491	/* adjust periodics after time jump */	1020	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	1021	for (i = 0; i < periodiccnt; ++i)
493	{	1022	{
494	struct ev_periodic *w = periodics [i];	1023	struct ev_periodic *w = periodics [i];
495		1024
496	if (w->interval)	1025	if (w->interval)
497	{	1026	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1027	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
499		1028
500	if (fabs (diff) >= 1e-4)	1029	if (fabs (diff) >= 1e-4)
501	{	1030	{
502	evperiodic_stop (w);	1031	ev_periodic_stop (EV_A_ w);
503	evperiodic_start (w);	1032	ev_periodic_start (EV_A_ w);
504		1033
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1034	i = 0; /* restart loop, inefficient, but time jumps should be rare */
506	}	1035	}
507	}	1036	}
508	}	1037	}
509	}	1038	}
510		1039
		1040	inline int
		1041	time_update_monotonic (EV_P)
		1042	{
		1043	mn_now = get_clock ();
		1044
		1045	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1046	{
		1047	rt_now = rtmn_diff + mn_now;
		1048	return 0;
		1049	}
		1050	else
		1051	{
		1052	now_floor = mn_now;
		1053	rt_now = ev_time ();
		1054	return 1;
		1055	}
		1056	}
		1057
511	static void	1058	static void
512	time_update ()	1059	time_update (EV_P)
513	{	1060	{
514	int i;	1061	int i;
515		1062
516	ev_now = ev_time ();	1063	#if EV_USE_MONOTONIC
517
518	if (have_monotonic)	1064	if (expect_true (have_monotonic))
519	{	1065	{
520	ev_tstamp odiff = diff;	1066	if (time_update_monotonic (EV_A))
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	1067	{
524	now = get_clock ();	1068	ev_tstamp odiff = rtmn_diff;
		1069
		1070	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1071	{
525	diff = ev_now - now;	1072	rtmn_diff = rt_now - mn_now;
526		1073
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1074	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
528	return; /* all is well */	1075	return; /* all is well */
529		1076
530	ev_now = ev_time ();	1077	rt_now = ev_time ();
		1078	mn_now = get_clock ();
		1079	now_floor = mn_now;
		1080	}
		1081
		1082	periodics_reschedule (EV_A);
		1083	/* no timer adjustment, as the monotonic clock doesn't jump */
		1084	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
531	}	1085	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}	1086	}
536	else	1087	else
		1088	#endif
537	{	1089	{
538	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1090	rt_now = ev_time ();
		1091
		1092	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
539	{	1093	{
540	periodics_reschedule (ev_now - now);	1094	periodics_reschedule (EV_A);
541		1095
542	/* adjust timers. this is easy, as the offset is the same for all */	1096	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	1097	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	1098	((WT)timers [i])->at += rt_now - mn_now;
545	}	1099	}
546		1100
547	now = ev_now;	1101	mn_now = rt_now;
548	}	1102	}
549	}	1103	}
550		1104
551	int ev_loop_done;	1105	void
		1106	ev_ref (EV_P)
		1107	{
		1108	++activecnt;
		1109	}
552		1110
		1111	void
		1112	ev_unref (EV_P)
		1113	{
		1114	--activecnt;
		1115	}
		1116
		1117	static int loop_done;
		1118
		1119	void
553	void ev_loop (int flags)	1120	ev_loop (EV_P_ int flags)
554	{	1121	{
555	double block;	1122	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1123	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		1124
564	do	1125	do
565	{	1126	{
		1127	/* queue check watchers (and execute them) */
		1128	if (expect_false (preparecnt))
		1129	{
		1130	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1131	call_pending (EV_A);
		1132	}
		1133
		1134	/* we might have forked, so reify kernel state if necessary */
		1135	if (expect_false (postfork))
		1136	loop_fork (EV_A);
		1137
566	/* update fd-related kernel structures */	1138	/* update fd-related kernel structures */
567	fd_reify ();	1139	fd_reify (EV_A);
568		1140
569	/* calculate blocking time */	1141	/* calculate blocking time */
570		1142
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1143	/* we only need this for !monotonic clockor timers, but as we basically
		1144	always have timers, we just calculate it always */
		1145	#if EV_USE_MONOTONIC
		1146	if (expect_true (have_monotonic))
		1147	time_update_monotonic (EV_A);
		1148	else
		1149	#endif
		1150	{
572	ev_now = ev_time ();	1151	rt_now = ev_time ();
		1152	mn_now = rt_now;
		1153	}
573		1154
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1155	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	1156	block = 0.;
576	else	1157	else
577	{	1158	{
578	block = MAX_BLOCKTIME;	1159	block = MAX_BLOCKTIME;
579		1160
580	if (timercnt)	1161	if (timercnt)
581	{	1162	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1163	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
583	if (block > to) block = to;	1164	if (block > to) block = to;
584	}	1165	}
585		1166
586	if (periodiccnt)	1167	if (periodiccnt)
587	{	1168	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1169	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
589	if (block > to) block = to;	1170	if (block > to) block = to;
590	}	1171	}
591		1172
592	if (block < 0.) block = 0.;	1173	if (block < 0.) block = 0.;
593	}	1174	}
594		1175
595	method_poll (block);	1176	method_poll (EV_A_ block);
596		1177
597	/* update ev_now, do magic */	1178	/* update rt_now, do magic */
598	time_update ();	1179	time_update (EV_A);
599		1180
600	/* queue pending timers and reschedule them */	1181	/* queue pending timers and reschedule them */
		1182	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	1183	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		1184
604	/* queue idle watchers unless io or timers are pending */	1185	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1186	if (!pendingcnt)
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1187	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1188
608	/* queue check and possibly idle watchers */	1189	/* queue check watchers, to be executed first */
		1190	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1191	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1192
611	call_pending ();	1193	call_pending (EV_A);
612	}	1194	}
613	while (!ev_loop_done);	1195	while (activecnt && !loop_done);
614		1196
615	if (ev_loop_done != 2)	1197	if (loop_done != 2)
616	ev_loop_done = 0;	1198	loop_done = 0;
		1199	}
		1200
		1201	void
		1202	ev_unloop (EV_P_ int how)
		1203	{
		1204	loop_done = how;
617	}	1205	}
618		1206
619	/*****************************************************************************/	1207	/*****************************************************************************/
620		1208
621	static void	1209	inline void
622	wlist_add (WL *head, WL elem)	1210	wlist_add (WL *head, WL elem)
623	{	1211	{
624	elem->next = *head;	1212	elem->next = *head;
625	*head = elem;	1213	*head = elem;
626	}	1214	}
627		1215
628	static void	1216	inline void
629	wlist_del (WL *head, WL elem)	1217	wlist_del (WL *head, WL elem)
630	{	1218	{
631	while (*head)	1219	while (*head)
632	{	1220	{
633	if (*head == elem)	1221	if (*head == elem)
…		…
638		1226
639	head = &(*head)->next;	1227	head = &(*head)->next;
640	}	1228	}
641	}	1229	}
642		1230
643	static void	1231	inline void
644	ev_clear (W w)	1232	ev_clear_pending (EV_P_ W w)
645	{	1233	{
646	if (w->pending)	1234	if (w->pending)
647	{	1235	{
648	pendings [w->pending - 1].w = 0;	1236	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1237	w->pending = 0;
650	}	1238	}
651	}	1239	}
652		1240
653	static void	1241	inline void
654	ev_start (W w, int active)	1242	ev_start (EV_P_ W w, int active)
655	{	1243	{
		1244	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1245	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1246
656	w->active = active;	1247	w->active = active;
		1248	ev_ref (EV_A);
657	}	1249	}
658		1250
659	static void	1251	inline void
660	ev_stop (W w)	1252	ev_stop (EV_P_ W w)
661	{	1253	{
		1254	ev_unref (EV_A);
662	w->active = 0;	1255	w->active = 0;
663	}	1256	}
664		1257
665	/*****************************************************************************/	1258	/*****************************************************************************/
666		1259
667	void	1260	void
668	evio_start (struct ev_io *w)	1261	ev_io_start (EV_P_ struct ev_io *w)
669	{	1262	{
		1263	int fd = w->fd;
		1264
670	if (ev_is_active (w))	1265	if (ev_is_active (w))
671	return;	1266	return;
672		1267
673	int fd = w->fd;	1268	assert (("ev_io_start called with negative fd", fd >= 0));
674		1269
675	ev_start ((W)w, 1);	1270	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1271	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1272	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1273
679	++fdchangecnt;	1274	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1275	}
683		1276
684	void	1277	void
685	evio_stop (struct ev_io *w)	1278	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1279	{
687	ev_clear ((W)w);	1280	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1281	if (!ev_is_active (w))
689	return;	1282	return;
690		1283
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1284	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1285	ev_stop (EV_A_ (W)w);
693		1286
694	++fdchangecnt;	1287	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1288	}
698		1289
699	void	1290	void
700	evtimer_start (struct ev_timer *w)	1291	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1292	{
702	if (ev_is_active (w))	1293	if (ev_is_active (w))
703	return;	1294	return;
704		1295
705	w->at += now;	1296	((WT)w)->at += mn_now;
706		1297
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1298	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1299
709	ev_start ((W)w, ++timercnt);	1300	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1301	array_needsize (timers, timermax, timercnt, (void));
711	timers [timercnt - 1] = w;	1302	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1303	upheap ((WT *)timers, timercnt - 1);
713	}
714		1304
		1305	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1306	}
		1307
715	void	1308	void
716	evtimer_stop (struct ev_timer *w)	1309	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1310	{
718	ev_clear ((W)w);	1311	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1312	if (!ev_is_active (w))
720	return;	1313	return;
721		1314
		1315	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1316
722	if (w->active < timercnt--)	1317	if (((W)w)->active < timercnt--)
723	{	1318	{
724	timers [w->active - 1] = timers [timercnt];	1319	timers [((W)w)->active - 1] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1320	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
726	}	1321	}
727		1322
728	w->at = w->repeat;	1323	((WT)w)->at = w->repeat;
729		1324
730	ev_stop ((W)w);	1325	ev_stop (EV_A_ (W)w);
731	}	1326	}
732		1327
733	void	1328	void
734	evtimer_again (struct ev_timer *w)	1329	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1330	{
736	if (ev_is_active (w))	1331	if (ev_is_active (w))
737	{	1332	{
738	if (w->repeat)	1333	if (w->repeat)
739	{	1334	{
740	w->at = now + w->repeat;	1335	((WT)w)->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1336	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
742	}	1337	}
743	else	1338	else
744	evtimer_stop (w);	1339	ev_timer_stop (EV_A_ w);
745	}	1340	}
746	else if (w->repeat)	1341	else if (w->repeat)
747	evtimer_start (w);	1342	ev_timer_start (EV_A_ w);
748	}	1343	}
749		1344
750	void	1345	void
751	evperiodic_start (struct ev_periodic *w)	1346	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1347	{
753	if (ev_is_active (w))	1348	if (ev_is_active (w))
754	return;	1349	return;
755		1350
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1351	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
757		1352
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1353	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)	1354	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1355	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
761		1356
762	ev_start ((W)w, ++periodiccnt);	1357	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1358	array_needsize (periodics, periodicmax, periodiccnt, (void));
764	periodics [periodiccnt - 1] = w;	1359	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1360	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1361
		1362	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1363	}
		1364
768	void	1365	void
769	evperiodic_stop (struct ev_periodic *w)	1366	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1367	{
771	ev_clear ((W)w);	1368	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1369	if (!ev_is_active (w))
773	return;	1370	return;
774		1371
		1372	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1373
775	if (w->active < periodiccnt--)	1374	if (((W)w)->active < periodiccnt--)
776	{	1375	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1376	periodics [((W)w)->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1377	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
779	}	1378	}
780		1379
781	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
782	}	1381	}
783		1382
784	void	1383	void
785	evsignal_start (struct ev_signal *w)	1384	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1385	{
787	if (ev_is_active (w))	1386	if (ev_is_active (w))
788	return;	1387	return;
789		1388
		1389	ev_start (EV_A_ (W)w, ++idlecnt);
		1390	array_needsize (idles, idlemax, idlecnt, (void));
		1391	idles [idlecnt - 1] = w;
		1392	}
		1393
		1394	void
		1395	ev_idle_stop (EV_P_ struct ev_idle *w)
		1396	{
		1397	ev_clear_pending (EV_A_ (W)w);
		1398	if (ev_is_active (w))
		1399	return;
		1400
		1401	idles [((W)w)->active - 1] = idles [--idlecnt];
		1402	ev_stop (EV_A_ (W)w);
		1403	}
		1404
		1405	void
		1406	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1407	{
		1408	if (ev_is_active (w))
		1409	return;
		1410
		1411	ev_start (EV_A_ (W)w, ++preparecnt);
		1412	array_needsize (prepares, preparemax, preparecnt, (void));
		1413	prepares [preparecnt - 1] = w;
		1414	}
		1415
		1416	void
		1417	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1418	{
		1419	ev_clear_pending (EV_A_ (W)w);
		1420	if (ev_is_active (w))
		1421	return;
		1422
		1423	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1424	ev_stop (EV_A_ (W)w);
		1425	}
		1426
		1427	void
		1428	ev_check_start (EV_P_ struct ev_check *w)
		1429	{
		1430	if (ev_is_active (w))
		1431	return;
		1432
		1433	ev_start (EV_A_ (W)w, ++checkcnt);
		1434	array_needsize (checks, checkmax, checkcnt, (void));
		1435	checks [checkcnt - 1] = w;
		1436	}
		1437
		1438	void
		1439	ev_check_stop (EV_P_ struct ev_check *w)
		1440	{
		1441	ev_clear_pending (EV_A_ (W)w);
		1442	if (ev_is_active (w))
		1443	return;
		1444
		1445	checks [((W)w)->active - 1] = checks [--checkcnt];
		1446	ev_stop (EV_A_ (W)w);
		1447	}
		1448
		1449	#ifndef SA_RESTART
		1450	# define SA_RESTART 0
		1451	#endif
		1452
		1453	void
		1454	ev_signal_start (EV_P_ struct ev_signal *w)
		1455	{
		1456	#if EV_MULTIPLICITY
		1457	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1458	#endif
		1459	if (ev_is_active (w))
		1460	return;
		1461
		1462	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1463
790	ev_start ((W)w, 1);	1464	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1465	array_needsize (signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1466	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1467
794	if (!w->next)	1468	if (!((WL)w)->next)
795	{	1469	{
		1470	#if WIN32
		1471	signal (w->signum, sighandler);
		1472	#else
796	struct sigaction sa;	1473	struct sigaction sa;
797	sa.sa_handler = sighandler;	1474	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1475	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1476	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1477	sigaction (w->signum, &sa, 0);
		1478	#endif
801	}	1479	}
802	}	1480	}
803		1481
804	void	1482	void
805	evsignal_stop (struct ev_signal *w)	1483	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1484	{
807	ev_clear ((W)w);	1485	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1486	if (!ev_is_active (w))
809	return;	1487	return;
810		1488
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1489	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1490	ev_stop (EV_A_ (W)w);
813		1491
814	if (!signals [w->signum - 1].head)	1492	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1493	signal (w->signum, SIG_DFL);
816	}	1494	}
817		1495
818	void evidle_start (struct ev_idle *w)	1496	void
		1497	ev_child_start (EV_P_ struct ev_child *w)
819	{	1498	{
		1499	#if EV_MULTIPLICITY
		1500	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1501	#endif
820	if (ev_is_active (w))	1502	if (ev_is_active (w))
821	return;	1503	return;
822		1504
823	ev_start ((W)w, ++idlecnt);	1505	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1506	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1507	}
827		1508
828	void evidle_stop (struct ev_idle *w)	1509	void
		1510	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1511	{
830	ev_clear ((W)w);	1512	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1513	if (ev_is_active (w))
832	return;	1514	return;
833		1515
834	idles [w->active - 1] = idles [--idlecnt];	1516	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1517	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	}	1518	}
857		1519
858	/*****************************************************************************/	1520	/*****************************************************************************/
859		1521
860	struct ev_once	1522	struct ev_once
…		…
864	void (cb)(int revents, void arg);	1526	void (cb)(int revents, void arg);
865	void *arg;	1527	void *arg;
866	};	1528	};
867		1529
868	static void	1530	static void
869	once_cb (struct ev_once *once, int revents)	1531	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1532	{
871	void (cb)(int revents, void arg) = once->cb;	1533	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	1534	void *arg = once->arg;
873		1535
874	evio_stop (&once->io);	1536	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1537	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1538	ev_free (once);
877		1539
878	cb (revents, arg);	1540	cb (revents, arg);
879	}	1541	}
880		1542
881	static void	1543	static void
882	once_cb_io (struct ev_io *w, int revents)	1544	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1545	{
884	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1546	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
885	}	1547	}
886		1548
887	static void	1549	static void
888	once_cb_to (struct ev_timer *w, int revents)	1550	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1551	{
890	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1552	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
891	}	1553	}
892		1554
893	void	1555	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1556	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
895	{	1557	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1558	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
897		1559
898	if (!once)	1560	if (!once)
899	cb (EV_ERROR, arg);	1561	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
900	else	1562	else
901	{	1563	{
902	once->cb = cb;	1564	once->cb = cb;
903	once->arg = arg;	1565	once->arg = arg;
904		1566
905	evw_init (&once->io, once_cb_io);	1567	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1568	if (fd >= 0)
908	{	1569	{
909	evio_set (&once->io, fd, events);	1570	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1571	ev_io_start (EV_A_ &once->io);
911	}	1572	}
912		1573
913	evw_init (&once->to, once_cb_to);	1574	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1575	if (timeout >= 0.)
916	{	1576	{
917	evtimer_set (&once->to, timeout, 0.);	1577	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1578	ev_timer_start (EV_A_ &once->to);
919	}	1579	}
920	}	1580	}
921	}	1581	}
922		1582
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 1.72 by root, Tue Nov 6 16:09:37 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 1.72 by root, Tue Nov 6 16:09:37 2007 UTC