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Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.77 by root, Thu Nov 8 00:44:17 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	59	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	60	#include <stddef.h>
36		61
37	#include <stdio.h>	62	#include <stdio.h>
38		63
39	#include <assert.h>	64	#include <assert.h>
40	#include <errno.h>	65	#include <errno.h>
41	#include <sys/time.h>	66	#include <sys/types.h>
42	#include <time.h>	67	#include <time.h>
43		68
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
44	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
45	# ifdef CLOCK_MONOTONIC
46	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
47	# endif	105	# endif
48	#endif	106	#endif
49		107
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
60	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
61		125
62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
64		130
65	#include "ev.h"	131	#include "ev.h"
		132
		133	#if __GNUC__ >= 3
		134	# define expect(expr,value) __builtin_expect ((expr),(value))
		135	# define inline inline
		136	#else
		137	# define expect(expr,value) (expr)
		138	# define inline static
		139	#endif
		140
		141	#define expect_false(expr) expect ((expr) != 0, 0)
		142	#define expect_true(expr) expect ((expr) != 0, 1)
		143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
66		146
67	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
70		150
71	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74		152
75	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		154
81	/*****************************************************************************/	155	/*****************************************************************************/
82		156
83	ev_tstamp	157	static void (*syserr_cb)(const char *msg);
		158
		159	void ev_set_syserr_cb (void (*cb)(const char *msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void *(*alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
		224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
84	ev_time (void)	239	ev_time (void)
85	{	240	{
86	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
87	struct timespec ts;	242	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	245	#else
91	struct timeval tv;	246	struct timeval tv;
92	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	249	#endif
95	}	250	}
96		251
97	static ev_tstamp	252	inline ev_tstamp
98	get_clock (void)	253	get_clock (void)
99	{	254	{
100	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
101	if (have_monotonic)	256	if (expect_true (have_monotonic))
102	{	257	{
103	struct timespec ts;	258	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	261	}
107	#endif	262	#endif
108		263
109	return ev_time ();	264	return ev_time ();
110	}	265	}
111		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(type,n) ((n) | 4 & ~3)
		274
112	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
114	{ \	277	{ \
115	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
		279	do \
		280	{ \
		281	newcnt = array_roundsize (type, newcnt << 1); \
		282	} \
		283	while ((cnt) > newcnt); \
		284	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	285	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
117	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	287	cur = newcnt; \
119	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		305
121	/*****************************************************************************/	306	/*****************************************************************************/
122		307
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	308	static void
136	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
137	{	310	{
138	while (count--)	311	while (count--)
139	{	312	{
140	base->head = 0;	313	base->head = 0;
141	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
142	++base;	317	++base;
143	}	318	}
144	}	319	}
145		320
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void	321	static void
156	event (W w, int events)	322	event (EV_P_ W w, int events)
157	{	323	{
158	if (w->active)	324	if (w->pending)
159	{	325	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	326	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		327	return;
164	}	328	}
165	}
166		329
		330	w->pending = ++pendingcnt [ABSPRI (w)];
		331	array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
		332	pendings [ABSPRI (w)][w->pending - 1].w = w;
		333	pendings [ABSPRI (w)][w->pending - 1].events = events;
		334	}
		335
167	static void	336	static void
		337	queue_events (EV_P_ W *events, int eventcnt, int type)
		338	{
		339	int i;
		340
		341	for (i = 0; i < eventcnt; ++i)
		342	event (EV_A_ events [i], type);
		343	}
		344
		345	static void
168	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
169	{	347	{
170	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	349	struct ev_io *w;
172		350
173	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
174	{	352	{
175	int ev = w->events & events;	353	int ev = w->events & events;
176		354
177	if (ev)	355	if (ev)
178	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
179	}	357	}
180	}	358	}
181		359
		360	/*****************************************************************************/
		361
182	static void	362	static void
183	queue_events (W *events, int eventcnt, int type)	363	fd_reify (EV_P)
184	{	364	{
185	int i;	365	int i;
186		366
187	for (i = 0; i < eventcnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	368	{
		369	int fd = fdchanges [i];
		370	ANFD *anfd = anfds + fd;
		371	struct ev_io *w;
		372
		373	int events = 0;
		374
		375	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		376	events |= w->events;
		377
		378	anfd->reify = 0;
		379
		380	method_modify (EV_A_ fd, anfd->events, events);
		381	anfd->events = events;
		382	}
		383
		384	fdchangecnt = 0;
		385	}
		386
		387	static void
		388	fd_change (EV_P_ int fd)
		389	{
		390	if (anfds [fd].reify)
		391	return;
		392
		393	anfds [fd].reify = 1;
		394
		395	++fdchangecnt;
		396	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		397	fdchanges [fdchangecnt - 1] = fd;
		398	}
		399
		400	static void
		401	fd_kill (EV_P_ int fd)
		402	{
		403	struct ev_io *w;
		404
		405	while ((w = (struct ev_io *)anfds [fd].head))
		406	{
		407	ev_io_stop (EV_A_ w);
		408	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		409	}
		410	}
		411
		412	static int
		413	fd_valid (int fd)
		414	{
		415	#ifdef WIN32
		416	return !!win32_get_osfhandle (fd);
		417	#else
		418	return fcntl (fd, F_GETFD) != -1;
		419	#endif
189	}	420	}
190		421
191	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
192	static void	423	static void
193	fd_recheck ()	424	fd_ebadf (EV_P)
194	{	425	{
195	int fd;	426	int fd;
196		427
197	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	429	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
200	while (anfds [fd].head)	431	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	432	}
		433
		434	/* called on ENOMEM in select/poll to kill some fds and retry */
		435	static void
		436	fd_enomem (EV_P)
		437	{
		438	int fd;
		439
		440	for (fd = anfdmax; fd--; )
		441	if (anfds [fd].events)
		442	{
		443	fd_kill (EV_A_ fd);
		444	return;
		445	}
		446	}
		447
		448	/* usually called after fork if method needs to re-arm all fds from scratch */
		449	static void
		450	fd_rearm_all (EV_P)
		451	{
		452	int fd;
		453
		454	/* this should be highly optimised to not do anything but set a flag */
		455	for (fd = 0; fd < anfdmax; ++fd)
		456	if (anfds [fd].events)
		457	{
		458	anfds [fd].events = 0;
		459	fd_change (EV_A_ fd);
		460	}
202	}	461	}
203		462
204	/*****************************************************************************/	463	/*****************************************************************************/
205		464
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	465	static void
213	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
214	{	467	{
215	WT w = timers [k];	468	WT w = heap [k];
216		469
217	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
218	{	471	{
219	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
221	k >>= 1;	474	k >>= 1;
222	}	475	}
223		476
224	timers [k] = w;	477	heap [k] = w;
225	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
226		479
227	}	480	}
228		481
229	static void	482	static void
230	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
231	{	484	{
232	WT w = timers [k];	485	WT w = heap [k];
233		486
234	while (k < (N >> 1))	487	while (k < (N >> 1))
235	{	488	{
236	int j = k << 1;	489	int j = k << 1;
237		490
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	492	++j;
240		493
241	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
242	break;	495	break;
243		496
244	timers [k] = timers [j];	497	heap [k] = heap [j];
245	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
246	k = j;	499	k = j;
247	}	500	}
248		501
249	timers [k] = w;	502	heap [k] = w;
250	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
251	}	504	}
252		505
253	/*****************************************************************************/	506	/*****************************************************************************/
254		507
255	typedef struct	508	typedef struct
256	{	509	{
257	struct ev_signal *head;	510	WL head;
258	sig_atomic_t gotsig;	511	sig_atomic_t volatile gotsig;
259	} ANSIG;	512	} ANSIG;
260		513
261	static ANSIG *signals;	514	static ANSIG *signals;
262	static int signalmax;	515	static int signalmax;
263		516
264	static int sigpipe [2];	517	static int sigpipe [2];
265	static sig_atomic_t gotsig;	518	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	519	static struct ev_io sigev;
267		520
268	static void	521	static void
269	signals_init (ANSIG *base, int count)	522	signals_init (ANSIG *base, int count)
270	{	523	{
271	while (count--)	524	while (count--)
272	{	525	{
273	base->head = 0;	526	base->head = 0;
274	base->gotsig = 0;	527	base->gotsig = 0;
		528
275	++base;	529	++base;
276	}	530	}
277	}	531	}
278		532
279	static void	533	static void
280	sighandler (int signum)	534	sighandler (int signum)
281	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
282	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
283		541
284	if (!gotsig)	542	if (!gotsig)
285	{	543	{
		544	int old_errno = errno;
286	gotsig = 1;	545	gotsig = 1;
		546	#ifdef WIN32
		547	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		548	#else
287	write (sigpipe [1], &gotsig, 1);	549	write (sigpipe [1], &signum, 1);
		550	#endif
		551	errno = old_errno;
288	}	552	}
289	}	553	}
290		554
291	static void	555	static void
292	sigcb (struct ev_io *iow, int revents)	556	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	557	{
294	struct ev_signal *w;	558	WL w;
295	int sig;	559	int signum;
296		560
		561	#ifdef WIN32
		562	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		563	#else
		564	read (sigpipe [0], &revents, 1);
		565	#endif
297	gotsig = 0;	566	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		567
300	for (sig = signalmax; sig--; )	568	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	569	if (signals [signum].gotsig)
302	{	570	{
303	signals [sig].gotsig = 0;	571	signals [signum].gotsig = 0;
304		572
305	for (w = signals [sig].head; w; w = w->next)	573	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	574	event (EV_A_ (W)w, EV_SIGNAL);
307	}	575	}
308	}	576	}
309		577
310	static void	578	static void
311	siginit (void)	579	siginit (EV_P)
312	{	580	{
		581	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	582	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	583	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		584
316	/* rather than sort out wether we really need nb, set it */	585	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	586	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	587	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		588	#endif
319		589
320	evio_set (&sigev, sigpipe [0], EV_READ);	590	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	591	ev_io_start (EV_A_ &sigev);
		592	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	593	}
323		594
324	/*****************************************************************************/	595	/*****************************************************************************/
325		596
326	static struct ev_idle **idles;	597	static struct ev_child *childs [PID_HASHSIZE];
327	static int idlemax, idlecnt;
328		598
329	static struct ev_prepare **prepares;	599	#ifndef WIN32
330	static int preparemax, preparecnt;
331		600
332	static struct ev_check **checks;	601	static struct ev_signal childev;
333	static int checkmax, checkcnt;	602
		603	#ifndef WCONTINUED
		604	# define WCONTINUED 0
		605	#endif
		606
		607	static void
		608	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		609	{
		610	struct ev_child *w;
		611
		612	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		613	if (w->pid == pid || !w->pid)
		614	{
		615	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		616	w->rpid = pid;
		617	w->rstatus = status;
		618	event (EV_A_ (W)w, EV_CHILD);
		619	}
		620	}
		621
		622	static void
		623	childcb (EV_P_ struct ev_signal *sw, int revents)
		624	{
		625	int pid, status;
		626
		627	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		628	{
		629	/* make sure we are called again until all childs have been reaped */
		630	event (EV_A_ (W)sw, EV_SIGNAL);
		631
		632	child_reap (EV_A_ sw, pid, pid, status);
		633	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		634	}
		635	}
		636
		637	#endif
334		638
335	/*****************************************************************************/	639	/*****************************************************************************/
336		640
		641	#if EV_USE_KQUEUE
		642	# include "ev_kqueue.c"
		643	#endif
337	#if HAVE_EPOLL	644	#if EV_USE_EPOLL
338	# include "ev_epoll.c"	645	# include "ev_epoll.c"
339	#endif	646	#endif
		647	#if EV_USE_POLL
		648	# include "ev_poll.c"
		649	#endif
340	#if HAVE_SELECT	650	#if EV_USE_SELECT
341	# include "ev_select.c"	651	# include "ev_select.c"
342	#endif	652	#endif
343		653
344	int ev_init (int flags)	654	int
		655	ev_version_major (void)
345	{	656	{
		657	return EV_VERSION_MAJOR;
		658	}
		659
		660	int
		661	ev_version_minor (void)
		662	{
		663	return EV_VERSION_MINOR;
		664	}
		665
		666	/* return true if we are running with elevated privileges and should ignore env variables */
		667	static int
		668	enable_secure (void)
		669	{
		670	#ifdef WIN32
		671	return 0;
		672	#else
		673	return getuid () != geteuid ()
		674	|| getgid () != getegid ();
		675	#endif
		676	}
		677
		678	int
		679	ev_method (EV_P)
		680	{
		681	return method;
		682	}
		683
		684	static void
		685	loop_init (EV_P_ int methods)
		686	{
		687	if (!method)
		688	{
346	#if HAVE_MONOTONIC	689	#if EV_USE_MONOTONIC
347	{	690	{
348	struct timespec ts;	691	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	692	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;	693	have_monotonic = 1;
351	}	694	}
352	#endif	695	#endif
353		696
354	ev_now = ev_time ();	697	rt_now = ev_time ();
355	now = get_clock ();	698	mn_now = get_clock ();
356	diff = ev_now - now;	699	now_floor = mn_now;
		700	rtmn_diff = rt_now - mn_now;
357		701
		702	if (methods == EVMETHOD_AUTO)
		703	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		704	methods = atoi (getenv ("LIBEV_METHODS"));
		705	else
		706	methods = EVMETHOD_ANY;
		707
		708	method = 0;
		709	#if EV_USE_WIN32
		710	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		711	#endif
		712	#if EV_USE_KQUEUE
		713	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		714	#endif
		715	#if EV_USE_EPOLL
		716	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		717	#endif
		718	#if EV_USE_POLL
		719	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		720	#endif
		721	#if EV_USE_SELECT
		722	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		723	#endif
		724
		725	ev_watcher_init (&sigev, sigcb);
		726	ev_set_priority (&sigev, EV_MAXPRI);
		727	}
		728	}
		729
		730	void
		731	loop_destroy (EV_P)
		732	{
		733	int i;
		734
		735	#if EV_USE_WIN32
		736	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		737	#endif
		738	#if EV_USE_KQUEUE
		739	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		740	#endif
		741	#if EV_USE_EPOLL
		742	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		743	#endif
		744	#if EV_USE_POLL
		745	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		746	#endif
		747	#if EV_USE_SELECT
		748	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		749	#endif
		750
		751	for (i = NUMPRI; i--; )
		752	array_free (pending, [i]);
		753
		754	/* have to use the microsoft-never-gets-it-right macro */
		755	array_free_microshit (fdchange);
		756	array_free_microshit (timer);
		757	array_free_microshit (periodic);
		758	array_free_microshit (idle);
		759	array_free_microshit (prepare);
		760	array_free_microshit (check);
		761
		762	method = 0;
		763	}
		764
		765	static void
		766	loop_fork (EV_P)
		767	{
		768	#if EV_USE_EPOLL
		769	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		770	#endif
		771	#if EV_USE_KQUEUE
		772	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		773	#endif
		774
		775	if (ev_is_active (&sigev))
		776	{
		777	/* default loop */
		778
		779	ev_ref (EV_A);
		780	ev_io_stop (EV_A_ &sigev);
		781	close (sigpipe [0]);
		782	close (sigpipe [1]);
		783
		784	while (pipe (sigpipe))
		785	syserr ("(libev) error creating pipe");
		786
		787	siginit (EV_A);
		788	}
		789
		790	postfork = 0;
		791	}
		792
		793	#if EV_MULTIPLICITY
		794	struct ev_loop *
		795	ev_loop_new (int methods)
		796	{
		797	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		798
		799	memset (loop, 0, sizeof (struct ev_loop));
		800
		801	loop_init (EV_A_ methods);
		802
		803	if (ev_method (EV_A))
		804	return loop;
		805
		806	return 0;
		807	}
		808
		809	void
		810	ev_loop_destroy (EV_P)
		811	{
		812	loop_destroy (EV_A);
		813	ev_free (loop);
		814	}
		815
		816	void
		817	ev_loop_fork (EV_P)
		818	{
		819	postfork = 1;
		820	}
		821
		822	#endif
		823
		824	#if EV_MULTIPLICITY
		825	struct ev_loop default_loop_struct;
		826	static struct ev_loop *default_loop;
		827
		828	struct ev_loop *
		829	#else
		830	static int default_loop;
		831
		832	int
		833	#endif
		834	ev_default_loop (int methods)
		835	{
		836	if (sigpipe [0] == sigpipe [1])
358	if (pipe (sigpipe))	837	if (pipe (sigpipe))
359	return 0;	838	return 0;
360		839
361	ev_method = EVMETHOD_NONE;	840	if (!default_loop)
362	#if HAVE_EPOLL	841	{
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	842	#if EV_MULTIPLICITY
		843	struct ev_loop *loop = default_loop = &default_loop_struct;
		844	#else
		845	default_loop = 1;
364	#endif	846	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368		847
		848	loop_init (EV_A_ methods);
		849
		850	if (ev_method (EV_A))
		851	{
		852	siginit (EV_A);
		853
		854	#ifndef WIN32
		855	ev_signal_init (&childev, childcb, SIGCHLD);
		856	ev_set_priority (&childev, EV_MAXPRI);
		857	ev_signal_start (EV_A_ &childev);
		858	ev_unref (EV_A); /* child watcher should not keep loop alive */
		859	#endif
		860	}
		861	else
		862	default_loop = 0;
		863	}
		864
		865	return default_loop;
		866	}
		867
		868	void
		869	ev_default_destroy (void)
		870	{
		871	#if EV_MULTIPLICITY
		872	struct ev_loop *loop = default_loop;
		873	#endif
		874
		875	#ifndef WIN32
		876	ev_ref (EV_A); /* child watcher */
		877	ev_signal_stop (EV_A_ &childev);
		878	#endif
		879
		880	ev_ref (EV_A); /* signal watcher */
		881	ev_io_stop (EV_A_ &sigev);
		882
		883	close (sigpipe [0]); sigpipe [0] = 0;
		884	close (sigpipe [1]); sigpipe [1] = 0;
		885
		886	loop_destroy (EV_A);
		887	}
		888
		889	void
		890	ev_default_fork (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
369	if (ev_method)	896	if (method)
370	{	897	postfork = 1;
371	evw_init (&sigev, sigcb);
372	siginit ();
373	}
374
375	return ev_method;
376	}	898	}
377		899
378	/*****************************************************************************/	900	/*****************************************************************************/
379		901
380	void ev_prefork (void)
381	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif
396
397	evio_stop (&sigev);
398	close (sigpipe [0]);
399	close (sigpipe [1]);
400	pipe (sigpipe);
401	siginit ();
402	}
403
404	/*****************************************************************************/
405
406	static void	902	static int
407	fd_reify (void)	903	any_pending (EV_P)
408	{	904	{
409	int i;	905	int pri;
410		906
411	for (i = 0; i < fdchangecnt; ++i)	907	for (pri = NUMPRI; pri--; )
412	{	908	if (pendingcnt [pri])
413	int fd = fdchanges [i];	909	return 1;
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416		910
417	int wev = 0;	911	return 0;
418
419	for (w = anfd->head; w; w = w->next)
420	wev |= w->events;
421
422	if (anfd->wev != wev)
423	{
424	method_modify (fd, anfd->wev, wev);
425	anfd->wev = wev;
426	}
427	}
428
429	fdchangecnt = 0;
430	}	912	}
431		913
432	static void	914	static void
433	call_pending ()	915	call_pending (EV_P)
434	{	916	{
		917	int pri;
		918
		919	for (pri = NUMPRI; pri--; )
435	while (pendingcnt)	920	while (pendingcnt [pri])
436	{	921	{
437	ANPENDING *p = pendings + --pendingcnt;	922	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
438		923
439	if (p->w)	924	if (p->w)
440	{	925	{
441	p->w->pending = 0;	926	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	927	p->w->cb (EV_A_ p->w, p->events);
443	}	928	}
444	}	929	}
445	}	930	}
446		931
447	static void	932	static void
448	timers_reify ()	933	timers_reify (EV_P)
449	{	934	{
450	while (timercnt && timers [0]->at <= now)	935	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	936	{
452	struct ev_timer *w = timers [0];	937	struct ev_timer *w = timers [0];
453		938
454	event ((W)w, EV_TIMEOUT);	939	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		940
456	/* first reschedule or stop timer */	941	/* first reschedule or stop timer */
457	if (w->repeat)	942	if (w->repeat)
458	{	943	{
		944	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
459	w->at = now + w->repeat;	945	((WT)w)->at = mn_now + w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));
461	downheap ((WT *)timers, timercnt, 0);	946	downheap ((WT *)timers, timercnt, 0);
462	}	947	}
463	else	948	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	949	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		950
		951	event (EV_A_ (W)w, EV_TIMEOUT);
		952	}
		953	}
		954
468	static void	955	static void
469	periodics_reify ()	956	periodics_reify (EV_P)
470	{	957	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	958	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
472	{	959	{
473	struct ev_periodic *w = periodics [0];	960	struct ev_periodic *w = periodics [0];
474		961
		962	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		963
475	/* first reschedule or stop timer */	964	/* first reschedule or stop timer */
476	if (w->interval)	965	if (w->reschedule_cb)
477	{	966	{
		967	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		968
		969	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		970	downheap ((WT *)periodics, periodiccnt, 0);
		971	}
		972	else if (w->interval)
		973	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	974	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	975	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	976	downheap ((WT *)periodics, periodiccnt, 0);
481	}	977	}
482	else	978	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	979	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		980
485	event ((W)w, EV_TIMEOUT);	981	event (EV_A_ (W)w, EV_PERIODIC);
486	}	982	}
487	}	983	}
488		984
489	static void	985	static void
490	periodics_reschedule (ev_tstamp diff)	986	periodics_reschedule (EV_P)
491	{	987	{
492	int i;	988	int i;
493		989
494	/* adjust periodics after time jump */	990	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	991	for (i = 0; i < periodiccnt; ++i)
496	{	992	{
497	struct ev_periodic *w = periodics [i];	993	struct ev_periodic *w = periodics [i];
498		994
		995	if (w->reschedule_cb)
		996	((WT)w)->at = w->reschedule_cb (w, rt_now);
499	if (w->interval)	997	else if (w->interval)
		998	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		999	}
		1000
		1001	/* now rebuild the heap */
		1002	for (i = periodiccnt >> 1; i--; )
		1003	downheap ((WT *)periodics, periodiccnt, i);
		1004	}
		1005
		1006	inline int
		1007	time_update_monotonic (EV_P)
		1008	{
		1009	mn_now = get_clock ();
		1010
		1011	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1012	{
		1013	rt_now = rtmn_diff + mn_now;
		1014	return 0;
		1015	}
		1016	else
		1017	{
		1018	now_floor = mn_now;
		1019	rt_now = ev_time ();
		1020	return 1;
		1021	}
		1022	}
		1023
		1024	static void
		1025	time_update (EV_P)
		1026	{
		1027	int i;
		1028
		1029	#if EV_USE_MONOTONIC
		1030	if (expect_true (have_monotonic))
		1031	{
		1032	if (time_update_monotonic (EV_A))
500	{	1033	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1034	ev_tstamp odiff = rtmn_diff;
502		1035
503	if (fabs (diff) >= 1e-4)	1036	for (i = 4; --i; ) /* loop a few times, before making important decisions */
504	{	1037	{
505	evperiodic_stop (w);	1038	rtmn_diff = rt_now - mn_now;
506	evperiodic_start (w);
507		1039
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1040	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1041	return; /* all is well */
		1042
		1043	rt_now = ev_time ();
		1044	mn_now = get_clock ();
		1045	now_floor = mn_now;
509	}	1046	}
		1047
		1048	periodics_reschedule (EV_A);
		1049	/* no timer adjustment, as the monotonic clock doesn't jump */
		1050	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
510	}	1051	}
511	}	1052	}
512	}	1053	else
513		1054	#endif
514	static void	1055	{
515	time_update ()
516	{
517	int i;
518
519	ev_now = ev_time ();	1056	rt_now = ev_time ();
520		1057
521	if (have_monotonic)	1058	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
522	{
523	ev_tstamp odiff = diff;
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	1059	{
527	now = get_clock ();
528	diff = ev_now - now;
529
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)
531	return; /* all is well */
532
533	ev_now = ev_time ();
534	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}
539	else
540	{
541	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
542	{
543	periodics_reschedule (ev_now - now);	1060	periodics_reschedule (EV_A);
544		1061
545	/* adjust timers. this is easy, as the offset is the same for all */	1062	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	1063	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1064	((WT)timers [i])->at += rt_now - mn_now;
548	}	1065	}
549		1066
550	now = ev_now;	1067	mn_now = rt_now;
551	}	1068	}
552	}	1069	}
553		1070
554	int ev_loop_done;	1071	void
		1072	ev_ref (EV_P)
		1073	{
		1074	++activecnt;
		1075	}
555		1076
		1077	void
		1078	ev_unref (EV_P)
		1079	{
		1080	--activecnt;
		1081	}
		1082
		1083	static int loop_done;
		1084
		1085	void
556	void ev_loop (int flags)	1086	ev_loop (EV_P_ int flags)
557	{	1087	{
558	double block;	1088	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1089	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
560		1090
561	do	1091	do
562	{	1092	{
563	/* queue check watchers (and execute them) */	1093	/* queue check watchers (and execute them) */
564	if (checkcnt)	1094	if (expect_false (preparecnt))
565	{	1095	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1096	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1097	call_pending (EV_A);
568	}	1098	}
569		1099
		1100	/* we might have forked, so reify kernel state if necessary */
		1101	if (expect_false (postfork))
		1102	loop_fork (EV_A);
		1103
570	/* update fd-related kernel structures */	1104	/* update fd-related kernel structures */
571	fd_reify ();	1105	fd_reify (EV_A);
572		1106
573	/* calculate blocking time */	1107	/* calculate blocking time */
574		1108
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1109	/* we only need this for !monotonic clock or timers, but as we basically
		1110	always have timers, we just calculate it always */
		1111	#if EV_USE_MONOTONIC
		1112	if (expect_true (have_monotonic))
		1113	time_update_monotonic (EV_A);
		1114	else
		1115	#endif
		1116	{
576	ev_now = ev_time ();	1117	rt_now = ev_time ();
		1118	mn_now = rt_now;
		1119	}
577		1120
578	if (flags & EVLOOP_NONBLOCK || idlecnt)	1121	if (flags & EVLOOP_NONBLOCK || idlecnt)
579	block = 0.;	1122	block = 0.;
580	else	1123	else
581	{	1124	{
582	block = MAX_BLOCKTIME;	1125	block = MAX_BLOCKTIME;
583		1126
584	if (timercnt)	1127	if (timercnt)
585	{	1128	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1129	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
587	if (block > to) block = to;	1130	if (block > to) block = to;
588	}	1131	}
589		1132
590	if (periodiccnt)	1133	if (periodiccnt)
591	{	1134	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1135	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
593	if (block > to) block = to;	1136	if (block > to) block = to;
594	}	1137	}
595		1138
596	if (block < 0.) block = 0.;	1139	if (block < 0.) block = 0.;
597	}	1140	}
598		1141
599	method_poll (block);	1142	method_poll (EV_A_ block);
600		1143
601	/* update ev_now, do magic */	1144	/* update rt_now, do magic */
602	time_update ();	1145	time_update (EV_A);
603		1146
604	/* queue pending timers and reschedule them */	1147	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1148	timers_reify (EV_A); /* relative timers called last */
606	periodics_reify (); /* absolute timers called first */	1149	periodics_reify (EV_A); /* absolute timers called first */
607		1150
608	/* queue idle watchers unless io or timers are pending */	1151	/* queue idle watchers unless io or timers are pending */
609	if (!pendingcnt)	1152	if (idlecnt && !any_pending (EV_A))
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1153	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		1154
612	/* queue check watchers, to be executed first */	1155	/* queue check watchers, to be executed first */
613	if (checkcnt)	1156	if (checkcnt)
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1157	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1158
616	call_pending ();	1159	call_pending (EV_A);
617	}	1160	}
618	while (!ev_loop_done);	1161	while (activecnt && !loop_done);
619		1162
620	if (ev_loop_done != 2)	1163	if (loop_done != 2)
621	ev_loop_done = 0;	1164	loop_done = 0;
		1165	}
		1166
		1167	void
		1168	ev_unloop (EV_P_ int how)
		1169	{
		1170	loop_done = how;
622	}	1171	}
623		1172
624	/*****************************************************************************/	1173	/*****************************************************************************/
625		1174
626	static void	1175	inline void
627	wlist_add (WL *head, WL elem)	1176	wlist_add (WL *head, WL elem)
628	{	1177	{
629	elem->next = *head;	1178	elem->next = *head;
630	*head = elem;	1179	*head = elem;
631	}	1180	}
632		1181
633	static void	1182	inline void
634	wlist_del (WL *head, WL elem)	1183	wlist_del (WL *head, WL elem)
635	{	1184	{
636	while (*head)	1185	while (*head)
637	{	1186	{
638	if (*head == elem)	1187	if (*head == elem)
…		…
643		1192
644	head = &(*head)->next;	1193	head = &(*head)->next;
645	}	1194	}
646	}	1195	}
647		1196
648	static void	1197	inline void
649	ev_clear (W w)	1198	ev_clear_pending (EV_P_ W w)
650	{	1199	{
651	if (w->pending)	1200	if (w->pending)
652	{	1201	{
653	pendings [w->pending - 1].w = 0;	1202	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1203	w->pending = 0;
655	}	1204	}
656	}	1205	}
657		1206
658	static void	1207	inline void
659	ev_start (W w, int active)	1208	ev_start (EV_P_ W w, int active)
660	{	1209	{
		1210	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1211	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1212
661	w->active = active;	1213	w->active = active;
		1214	ev_ref (EV_A);
662	}	1215	}
663		1216
664	static void	1217	inline void
665	ev_stop (W w)	1218	ev_stop (EV_P_ W w)
666	{	1219	{
		1220	ev_unref (EV_A);
667	w->active = 0;	1221	w->active = 0;
668	}	1222	}
669		1223
670	/*****************************************************************************/	1224	/*****************************************************************************/
671		1225
672	void	1226	void
673	evio_start (struct ev_io *w)	1227	ev_io_start (EV_P_ struct ev_io *w)
674	{	1228	{
		1229	int fd = w->fd;
		1230
675	if (ev_is_active (w))	1231	if (ev_is_active (w))
676	return;	1232	return;
677		1233
678	int fd = w->fd;	1234	assert (("ev_io_start called with negative fd", fd >= 0));
679		1235
680	ev_start ((W)w, 1);	1236	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1237	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1238	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1239
684	++fdchangecnt;	1240	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1241	}
688		1242
689	void	1243	void
690	evio_stop (struct ev_io *w)	1244	ev_io_stop (EV_P_ struct ev_io *w)
691	{	1245	{
692	ev_clear ((W)w);	1246	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1247	if (!ev_is_active (w))
694	return;	1248	return;
695		1249
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1250	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1251	ev_stop (EV_A_ (W)w);
698		1252
699	++fdchangecnt;	1253	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1254	}
703		1255
704	void	1256	void
705	evtimer_start (struct ev_timer *w)	1257	ev_timer_start (EV_P_ struct ev_timer *w)
706	{	1258	{
707	if (ev_is_active (w))	1259	if (ev_is_active (w))
708	return;	1260	return;
709		1261
710	w->at += now;	1262	((WT)w)->at += mn_now;
711		1263
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1264	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1265
714	ev_start ((W)w, ++timercnt);	1266	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1267	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
716	timers [timercnt - 1] = w;	1268	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1269	upheap ((WT *)timers, timercnt - 1);
718	}
719		1270
		1271	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1272	}
		1273
720	void	1274	void
721	evtimer_stop (struct ev_timer *w)	1275	ev_timer_stop (EV_P_ struct ev_timer *w)
722	{	1276	{
723	ev_clear ((W)w);	1277	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1278	if (!ev_is_active (w))
725	return;	1279	return;
726		1280
		1281	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1282
727	if (w->active < timercnt--)	1283	if (((W)w)->active < timercnt--)
728	{	1284	{
729	timers [w->active - 1] = timers [timercnt];	1285	timers [((W)w)->active - 1] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1286	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1287	}
732		1288
733	w->at = w->repeat;	1289	((WT)w)->at = w->repeat;
734		1290
735	ev_stop ((W)w);	1291	ev_stop (EV_A_ (W)w);
736	}	1292	}
737		1293
738	void	1294	void
739	evtimer_again (struct ev_timer *w)	1295	ev_timer_again (EV_P_ struct ev_timer *w)
740	{	1296	{
741	if (ev_is_active (w))	1297	if (ev_is_active (w))
742	{	1298	{
743	if (w->repeat)	1299	if (w->repeat)
744	{	1300	{
745	w->at = now + w->repeat;	1301	((WT)w)->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1302	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1303	}
748	else	1304	else
749	evtimer_stop (w);	1305	ev_timer_stop (EV_A_ w);
750	}	1306	}
751	else if (w->repeat)	1307	else if (w->repeat)
752	evtimer_start (w);	1308	ev_timer_start (EV_A_ w);
753	}	1309	}
754		1310
755	void	1311	void
756	evperiodic_start (struct ev_periodic *w)	1312	ev_periodic_start (EV_P_ struct ev_periodic *w)
757	{	1313	{
758	if (ev_is_active (w))	1314	if (ev_is_active (w))
759	return;	1315	return;
760		1316
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1317	if (w->reschedule_cb)
762		1318	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1319	else if (w->interval)
		1320	{
		1321	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1322	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1323	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1324	}
766		1325
767	ev_start ((W)w, ++periodiccnt);	1326	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1327	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
769	periodics [periodiccnt - 1] = w;	1328	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1329	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1330
		1331	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1332	}
		1333
773	void	1334	void
774	evperiodic_stop (struct ev_periodic *w)	1335	ev_periodic_stop (EV_P_ struct ev_periodic *w)
775	{	1336	{
776	ev_clear ((W)w);	1337	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1338	if (!ev_is_active (w))
778	return;	1339	return;
779		1340
		1341	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1342
780	if (w->active < periodiccnt--)	1343	if (((W)w)->active < periodiccnt--)
781	{	1344	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1345	periodics [((W)w)->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1346	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
784	}	1347	}
785		1348
786	ev_stop ((W)w);	1349	ev_stop (EV_A_ (W)w);
787	}	1350	}
788		1351
789	void	1352	void
790	evsignal_start (struct ev_signal *w)	1353	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1354	{
		1355	ev_periodic_stop (EV_A_ w);
		1356	ev_periodic_start (EV_A_ w);
		1357	}
		1358
		1359	void
		1360	ev_idle_start (EV_P_ struct ev_idle *w)
791	{	1361	{
792	if (ev_is_active (w))	1362	if (ev_is_active (w))
793	return;	1363	return;
794		1364
		1365	ev_start (EV_A_ (W)w, ++idlecnt);
		1366	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1367	idles [idlecnt - 1] = w;
		1368	}
		1369
		1370	void
		1371	ev_idle_stop (EV_P_ struct ev_idle *w)
		1372	{
		1373	ev_clear_pending (EV_A_ (W)w);
		1374	if (ev_is_active (w))
		1375	return;
		1376
		1377	idles [((W)w)->active - 1] = idles [--idlecnt];
		1378	ev_stop (EV_A_ (W)w);
		1379	}
		1380
		1381	void
		1382	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1383	{
		1384	if (ev_is_active (w))
		1385	return;
		1386
		1387	ev_start (EV_A_ (W)w, ++preparecnt);
		1388	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1389	prepares [preparecnt - 1] = w;
		1390	}
		1391
		1392	void
		1393	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1394	{
		1395	ev_clear_pending (EV_A_ (W)w);
		1396	if (ev_is_active (w))
		1397	return;
		1398
		1399	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1400	ev_stop (EV_A_ (W)w);
		1401	}
		1402
		1403	void
		1404	ev_check_start (EV_P_ struct ev_check *w)
		1405	{
		1406	if (ev_is_active (w))
		1407	return;
		1408
		1409	ev_start (EV_A_ (W)w, ++checkcnt);
		1410	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1411	checks [checkcnt - 1] = w;
		1412	}
		1413
		1414	void
		1415	ev_check_stop (EV_P_ struct ev_check *w)
		1416	{
		1417	ev_clear_pending (EV_A_ (W)w);
		1418	if (ev_is_active (w))
		1419	return;
		1420
		1421	checks [((W)w)->active - 1] = checks [--checkcnt];
		1422	ev_stop (EV_A_ (W)w);
		1423	}
		1424
		1425	#ifndef SA_RESTART
		1426	# define SA_RESTART 0
		1427	#endif
		1428
		1429	void
		1430	ev_signal_start (EV_P_ struct ev_signal *w)
		1431	{
		1432	#if EV_MULTIPLICITY
		1433	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1434	#endif
		1435	if (ev_is_active (w))
		1436	return;
		1437
		1438	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1439
795	ev_start ((W)w, 1);	1440	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1441	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1442	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1443
799	if (!w->next)	1444	if (!((WL)w)->next)
800	{	1445	{
		1446	#if WIN32
		1447	signal (w->signum, sighandler);
		1448	#else
801	struct sigaction sa;	1449	struct sigaction sa;
802	sa.sa_handler = sighandler;	1450	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1451	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1452	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1453	sigaction (w->signum, &sa, 0);
		1454	#endif
806	}	1455	}
807	}	1456	}
808		1457
809	void	1458	void
810	evsignal_stop (struct ev_signal *w)	1459	ev_signal_stop (EV_P_ struct ev_signal *w)
811	{	1460	{
812	ev_clear ((W)w);	1461	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1462	if (!ev_is_active (w))
814	return;	1463	return;
815		1464
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1465	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1466	ev_stop (EV_A_ (W)w);
818		1467
819	if (!signals [w->signum - 1].head)	1468	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1469	signal (w->signum, SIG_DFL);
821	}	1470	}
822		1471
823	void evidle_start (struct ev_idle *w)	1472	void
		1473	ev_child_start (EV_P_ struct ev_child *w)
824	{	1474	{
		1475	#if EV_MULTIPLICITY
		1476	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1477	#endif
825	if (ev_is_active (w))	1478	if (ev_is_active (w))
826	return;	1479	return;
827		1480
828	ev_start ((W)w, ++idlecnt);	1481	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1482	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1483	}
832		1484
833	void evidle_stop (struct ev_idle *w)	1485	void
		1486	ev_child_stop (EV_P_ struct ev_child *w)
834	{	1487	{
835	ev_clear ((W)w);	1488	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1489	if (ev_is_active (w))
837	return;	1490	return;
838		1491
839	idles [w->active - 1] = idles [--idlecnt];	1492	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1493	ev_stop (EV_A_ (W)w);
841	}
842
843	void evprepare_start (struct ev_prepare *w)
844	{
845	if (ev_is_active (w))
846	return;
847
848	ev_start ((W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );
850	prepares [preparecnt - 1] = w;
851	}
852
853	void evprepare_stop (struct ev_prepare *w)
854	{
855	ev_clear ((W)w);
856	if (ev_is_active (w))
857	return;
858
859	prepares [w->active - 1] = prepares [--preparecnt];
860	ev_stop ((W)w);
861	}
862
863	void evcheck_start (struct ev_check *w)
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );
870	checks [checkcnt - 1] = w;
871	}
872
873	void evcheck_stop (struct ev_check *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	checks [w->active - 1] = checks [--checkcnt];
880	ev_stop ((W)w);
881	}	1494	}
882		1495
883	/*****************************************************************************/	1496	/*****************************************************************************/
884		1497
885	struct ev_once	1498	struct ev_once
…		…
889	void (*cb)(int revents, void *arg);	1502	void (*cb)(int revents, void *arg);
890	void *arg;	1503	void *arg;
891	};	1504	};
892		1505
893	static void	1506	static void
894	once_cb (struct ev_once *once, int revents)	1507	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1508	{
896	void (*cb)(int revents, void *arg) = once->cb;	1509	void (*cb)(int revents, void *arg) = once->cb;
897	void *arg = once->arg;	1510	void *arg = once->arg;
898		1511
899	evio_stop (&once->io);	1512	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1513	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1514	ev_free (once);
902		1515
903	cb (revents, arg);	1516	cb (revents, arg);
904	}	1517	}
905		1518
906	static void	1519	static void
907	once_cb_io (struct ev_io *w, int revents)	1520	once_cb_io (EV_P_ struct ev_io *w, int revents)
908	{	1521	{
909	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1522	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
910	}	1523	}
911		1524
912	static void	1525	static void
913	once_cb_to (struct ev_timer *w, int revents)	1526	once_cb_to (EV_P_ struct ev_timer *w, int revents)
914	{	1527	{
915	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1528	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
916	}	1529	}
917		1530
918	void	1531	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1532	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
920	{	1533	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1534	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
922		1535
923	if (!once)	1536	if (!once)
924	cb (EV_ERROR, arg);	1537	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
925	else	1538	else
926	{	1539	{
927	once->cb = cb;	1540	once->cb = cb;
928	once->arg = arg;	1541	once->arg = arg;
929		1542
930	evw_init (&once->io, once_cb_io);	1543	ev_watcher_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1544	if (fd >= 0)
933	{	1545	{
934	evio_set (&once->io, fd, events);	1546	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1547	ev_io_start (EV_A_ &once->io);
936	}	1548	}
937		1549
938	evw_init (&once->to, once_cb_to);	1550	ev_watcher_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1551	if (timeout >= 0.)
941	{	1552	{
942	evtimer_set (&once->to, timeout, 0.);	1553	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1554	ev_timer_start (EV_A_ &once->to);
944	}	1555	}
945	}	1556	}
946	}	1557	}
947		1558
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}
1025
1026	#endif
1027
1028
1029
1030

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