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Comparing libev/ev.c (file contents):
Revision 1.33 by root, Thu Nov 1 11:11:22 2007 UTC vs.
Revision 1.69 by root, Tue Nov 6 00:10:04 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	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>	59	#include <unistd.h>
…		…
40	#include <stdio.h>	64	#include <stdio.h>
41		65
42	#include <assert.h>	66	#include <assert.h>
43	#include <errno.h>	67	#include <errno.h>
44	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
45	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
46	#include <sys/time.h>	72	#include <sys/time.h>
47	#include <time.h>	73	#include <time.h>
48		74
		75	/**/
		76
49	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	79	#endif
54		80
55	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
57	#endif	83	#endif
58		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
59	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
61	#endif	91	#endif
62		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
63	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
65	#endif	119	#endif
66	#ifndef EV_USE_REALTIME	120
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
68	#endif
69		122
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		127
75	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		143
77	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
80		147
81	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84		149
85	static int have_monotonic; /* runtime */	150	#if WIN32
86		151	/* note: the comment below could not be substantiated, but what would I care */
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
88	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
89	static void (*method_poll)(ev_tstamp timeout);	154	#endif
90		155
91	/*****************************************************************************/	156	/*****************************************************************************/
92		157
93	ev_tstamp	158	static void (*syserr_cb)(void);
		159
		160	void ev_set_syserr_cb (void (*cb)(void))
		161	{
		162	syserr_cb = cb;
		163	}
		164
		165	static void
		166	syserr (void)
		167	{
		168	if (syserr_cb)
		169	syserr_cb ();
		170	else
		171	{
		172	perror ("libev");
		173	abort ();
		174	}
		175	}
		176
		177	static void *(*alloc)(void *ptr, long size);
		178
		179	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		180	{
		181	alloc = cb;
		182	}
		183
		184	static void *
		185	ev_realloc (void *ptr, long size)
		186	{
		187	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		188
		189	if (!ptr && size)
		190	{
		191	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		192	abort ();
		193	}
		194
		195	return ptr;
		196	}
		197
		198	#define ev_malloc(size) ev_realloc (0, (size))
		199	#define ev_free(ptr) ev_realloc ((ptr), 0)
		200
		201	/*****************************************************************************/
		202
		203	typedef struct
		204	{
		205	WL head;
		206	unsigned char events;
		207	unsigned char reify;
		208	} ANFD;
		209
		210	typedef struct
		211	{
		212	W w;
		213	int events;
		214	} ANPENDING;
		215
		216	#if EV_MULTIPLICITY
		217
		218	struct ev_loop
		219	{
		220	# define VAR(name,decl) decl;
		221	# include "ev_vars.h"
		222	};
		223	# undef VAR
		224	# include "ev_wrap.h"
		225
		226	#else
		227
		228	# define VAR(name,decl) static decl;
		229	# include "ev_vars.h"
		230	# undef VAR
		231
		232	#endif
		233
		234	/*****************************************************************************/
		235
		236	inline ev_tstamp
94	ev_time (void)	237	ev_time (void)
95	{	238	{
96	#if EV_USE_REALTIME	239	#if EV_USE_REALTIME
97	struct timespec ts;	240	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	241	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	245	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	246	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	247	#endif
105	}	248	}
106		249
107	static ev_tstamp	250	inline ev_tstamp
108	get_clock (void)	251	get_clock (void)
109	{	252	{
110	#if EV_USE_MONOTONIC	253	#if EV_USE_MONOTONIC
111	if (have_monotonic)	254	if (expect_true (have_monotonic))
112	{	255	{
113	struct timespec ts;	256	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	257	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	258	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	259	}
117	#endif	260	#endif
118		261
119	return ev_time ();	262	return ev_time ();
120	}	263	}
121		264
		265	ev_tstamp
		266	ev_now (EV_P)
		267	{
		268	return rt_now;
		269	}
		270
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	271	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		272
124	#define array_needsize(base,cur,cnt,init) \	273	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	274	if (expect_false ((cnt) > cur)) \
126	{ \	275	{ \
127	int newcnt = cur; \	276	int newcnt = cur; \
128	do \	277	do \
129	{ \	278	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	279	newcnt = array_roundsize (base, newcnt << 1); \
131	} \	280	} \
132	while ((cnt) > newcnt); \	281	while ((cnt) > newcnt); \
133	\	282	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	283	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
135	init (base + cur, newcnt - cur); \	284	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	285	cur = newcnt; \
137	}	286	}
		287
		288	#define array_slim(stem) \
		289	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		290	{ \
		291	stem ## max = array_roundsize (stem ## cnt >> 1); \
		292	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \
		293	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		294	}
		295
		296	#define array_free(stem, idx) \
		297	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		298
139	/*****************************************************************************/	299	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150		300
151	static void	301	static void
152	anfds_init (ANFD *base, int count)	302	anfds_init (ANFD *base, int count)
153	{	303	{
154	while (count--)	304	while (count--)
…		…
159		309
160	++base;	310	++base;
161	}	311	}
162	}	312	}
163		313
164	typedef struct
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void	314	static void
174	event (W w, int events)	315	event (EV_P_ W w, int events)
175	{	316	{
176	if (w->pending)	317	if (w->pending)
177	{	318	{
178	pendings [w->pending - 1].events |= events;	319	pendings [ABSPRI (w)][w->pending - 1].events |= events;
179	return;	320	return;
180	}	321	}
181		322
182	w->pending = ++pendingcnt;	323	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	324	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
184	pendings [pendingcnt - 1].w = w;	325	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	326	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	327	}
187		328
188	static void	329	static void
189	queue_events (W *events, int eventcnt, int type)	330	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	331	{
191	int i;	332	int i;
192		333
193	for (i = 0; i < eventcnt; ++i)	334	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	335	event (EV_A_ events [i], type);
195	}	336	}
196		337
197	static void	338	static void
198	fd_event (int fd, int events)	339	fd_event (EV_P_ int fd, int events)
199	{	340	{
200	ANFD *anfd = anfds + fd;	341	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	342	struct ev_io *w;
202		343
203	for (w = anfd->head; w; w = w->next)	344	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
204	{	345	{
205	int ev = w->events & events;	346	int ev = w->events & events;
206		347
207	if (ev)	348	if (ev)
208	event ((W)w, ev);	349	event (EV_A_ (W)w, ev);
209	}	350	}
210	}	351	}
211		352
212	/*****************************************************************************/	353	/*****************************************************************************/
213		354
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	355	static void
218	fd_reify (void)	356	fd_reify (EV_P)
219	{	357	{
220	int i;	358	int i;
221		359
222	for (i = 0; i < fdchangecnt; ++i)	360	for (i = 0; i < fdchangecnt; ++i)
223	{	361	{
…		…
225	ANFD *anfd = anfds + fd;	363	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	364	struct ev_io *w;
227		365
228	int events = 0;	366	int events = 0;
229		367
230	for (w = anfd->head; w; w = w->next)	368	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
231	events |= w->events;	369	events |= w->events;
232		370
233	anfd->reify = 0;	371	anfd->reify = 0;
234		372
235	if (anfd->events != events)
236	{
237	method_modify (fd, anfd->events, events);	373	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	374	anfd->events = events;
239	}
240	}	375	}
241		376
242	fdchangecnt = 0;	377	fdchangecnt = 0;
243	}	378	}
244		379
245	static void	380	static void
246	fd_change (int fd)	381	fd_change (EV_P_ int fd)
247	{	382	{
248	if (anfds [fd].reify || fdchangecnt < 0)	383	if (anfds [fd].reify || fdchangecnt < 0)
249	return;	384	return;
250		385
251	anfds [fd].reify = 1;	386	anfds [fd].reify = 1;
…		…
253	++fdchangecnt;	388	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
255	fdchanges [fdchangecnt - 1] = fd;	390	fdchanges [fdchangecnt - 1] = fd;
256	}	391	}
257		392
		393	static void
		394	fd_kill (EV_P_ int fd)
		395	{
		396	struct ev_io *w;
		397
		398	while ((w = (struct ev_io *)anfds [fd].head))
		399	{
		400	ev_io_stop (EV_A_ w);
		401	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		402	}
		403	}
		404
258	/* called on EBADF to verify fds */	405	/* called on EBADF to verify fds */
259	static void	406	static void
260	fd_recheck (void)	407	fd_ebadf (EV_P)
261	{	408	{
262	int fd;	409	int fd;
263		410
264	for (fd = 0; fd < anfdmax; ++fd)	411	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	412	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	413	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
267	while (anfds [fd].head)	414	fd_kill (EV_A_ fd);
		415	}
		416
		417	/* called on ENOMEM in select/poll to kill some fds and retry */
		418	static void
		419	fd_enomem (EV_P)
		420	{
		421	int fd;
		422
		423	for (fd = anfdmax; fd--; )
		424	if (anfds [fd].events)
268	{	425	{
269	ev_io_stop (anfds [fd].head);	426	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	427	return;
271	}	428	}
		429	}
		430
		431	/* susually called after fork if method needs to re-arm all fds from scratch */
		432	static void
		433	fd_rearm_all (EV_P)
		434	{
		435	int fd;
		436
		437	/* this should be highly optimised to not do anything but set a flag */
		438	for (fd = 0; fd < anfdmax; ++fd)
		439	if (anfds [fd].events)
		440	{
		441	anfds [fd].events = 0;
		442	fd_change (EV_A_ fd);
		443	}
272	}	444	}
273		445
274	/*****************************************************************************/	446	/*****************************************************************************/
275		447
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	448	static void
283	upheap (WT *timers, int k)	449	upheap (WT *heap, int k)
284	{	450	{
285	WT w = timers [k];	451	WT w = heap [k];
286		452
287	while (k && timers [k >> 1]->at > w->at)	453	while (k && heap [k >> 1]->at > w->at)
288	{	454	{
289	timers [k] = timers [k >> 1];	455	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	456	((W)heap [k])->active = k + 1;
291	k >>= 1;	457	k >>= 1;
292	}	458	}
293		459
294	timers [k] = w;	460	heap [k] = w;
295	timers [k]->active = k + 1;	461	((W)heap [k])->active = k + 1;
296		462
297	}	463	}
298		464
299	static void	465	static void
300	downheap (WT *timers, int N, int k)	466	downheap (WT *heap, int N, int k)
301	{	467	{
302	WT w = timers [k];	468	WT w = heap [k];
303		469
304	while (k < (N >> 1))	470	while (k < (N >> 1))
305	{	471	{
306	int j = k << 1;	472	int j = k << 1;
307		473
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	474	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	475	++j;
310		476
311	if (w->at <= timers [j]->at)	477	if (w->at <= heap [j]->at)
312	break;	478	break;
313		479
314	timers [k] = timers [j];	480	heap [k] = heap [j];
315	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
316	k = j;	482	k = j;
317	}	483	}
318		484
319	timers [k] = w;	485	heap [k] = w;
320	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
321	}	487	}
322		488
323	/*****************************************************************************/	489	/*****************************************************************************/
324		490
325	typedef struct	491	typedef struct
326	{	492	{
327	struct ev_signal *head;	493	WL head;
328	sig_atomic_t gotsig;	494	sig_atomic_t volatile gotsig;
329	} ANSIG;	495	} ANSIG;
330		496
331	static ANSIG *signals;	497	static ANSIG *signals;
332	static int signalmax;	498	static int signalmax;
333		499
334	static int sigpipe [2];	500	static int sigpipe [2];
335	static sig_atomic_t gotsig;	501	static sig_atomic_t volatile gotsig;
336	static struct ev_io sigev;	502	static struct ev_io sigev;
337		503
338	static void	504	static void
339	signals_init (ANSIG *base, int count)	505	signals_init (ANSIG *base, int count)
340	{	506	{
…		…
348	}	514	}
349		515
350	static void	516	static void
351	sighandler (int signum)	517	sighandler (int signum)
352	{	518	{
		519	#if WIN32
		520	signal (signum, sighandler);
		521	#endif
		522
353	signals [signum - 1].gotsig = 1;	523	signals [signum - 1].gotsig = 1;
354		524
355	if (!gotsig)	525	if (!gotsig)
356	{	526	{
		527	int old_errno = errno;
357	gotsig = 1;	528	gotsig = 1;
358	write (sigpipe [1], &gotsig, 1);	529	write (sigpipe [1], &signum, 1);
		530	errno = old_errno;
359	}	531	}
360	}	532	}
361		533
362	static void	534	static void
363	sigcb (struct ev_io *iow, int revents)	535	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	536	{
365	struct ev_signal *w;	537	WL w;
366	int sig;	538	int signum;
367		539
		540	read (sigpipe [0], &revents, 1);
368	gotsig = 0;	541	gotsig = 0;
369	read (sigpipe [0], &revents, 1);
370		542
371	for (sig = signalmax; sig--; )	543	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	544	if (signals [signum].gotsig)
373	{	545	{
374	signals [sig].gotsig = 0;	546	signals [signum].gotsig = 0;
375		547
376	for (w = signals [sig].head; w; w = w->next)	548	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	549	event (EV_A_ (W)w, EV_SIGNAL);
378	}	550	}
379	}	551	}
380		552
381	static void	553	static void
382	siginit (void)	554	siginit (EV_P)
383	{	555	{
		556	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	557	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	558	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		559
387	/* rather than sort out wether we really need nb, set it */	560	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	561	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	562	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		563	#endif
390		564
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	565	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	566	ev_io_start (EV_A_ &sigev);
		567	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	568	}
394		569
395	/*****************************************************************************/	570	/*****************************************************************************/
396		571
397	static struct ev_idle **idles;	572	#ifndef WIN32
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407		573
408	static struct ev_child *childs [PID_HASHSIZE];	574	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;	575	static struct ev_signal childev;
410		576
411	#ifndef WCONTINUED	577	#ifndef WCONTINUED
412	# define WCONTINUED 0	578	# define WCONTINUED 0
413	#endif	579	#endif
414		580
415	static void	581	static void
416	childcb (struct ev_signal *sw, int revents)	582	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	583	{
418	struct ev_child *w;	584	struct ev_child *w;
		585
		586	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		587	if (w->pid == pid || !w->pid)
		588	{
		589	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		590	w->rpid = pid;
		591	w->rstatus = status;
		592	event (EV_A_ (W)w, EV_CHILD);
		593	}
		594	}
		595
		596	static void
		597	childcb (EV_P_ struct ev_signal *sw, int revents)
		598	{
419	int pid, status;	599	int pid, status;
420		600
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	601	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	602	{
423	if (w->pid == pid || w->pid == -1)	603	/* make sure we are called again until all childs have been reaped */
424	{	604	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	605
426	event ((W)w, EV_CHILD);	606	child_reap (EV_A_ sw, pid, pid, status);
427	}	607	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		608	}
428	}	609	}
		610
		611	#endif
429		612
430	/*****************************************************************************/	613	/*****************************************************************************/
431		614
		615	#if EV_USE_KQUEUE
		616	# include "ev_kqueue.c"
		617	#endif
432	#if EV_USE_EPOLL	618	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	619	# include "ev_epoll.c"
434	#endif	620	#endif
		621	#if EV_USE_POLL
		622	# include "ev_poll.c"
		623	#endif
435	#if EV_USE_SELECT	624	#if EV_USE_SELECT
436	# include "ev_select.c"	625	# include "ev_select.c"
437	#endif	626	#endif
438		627
439	int	628	int
…		…
446	ev_version_minor (void)	635	ev_version_minor (void)
447	{	636	{
448	return EV_VERSION_MINOR;	637	return EV_VERSION_MINOR;
449	}	638	}
450		639
451	int ev_init (int flags)	640	/* return true if we are running with elevated privileges and should ignore env variables */
		641	static int
		642	enable_secure (void)
452	{	643	{
		644	#ifdef WIN32
		645	return 0;
		646	#else
		647	return getuid () != geteuid ()
		648	|| getgid () != getegid ();
		649	#endif
		650	}
		651
		652	int
		653	ev_method (EV_P)
		654	{
		655	return method;
		656	}
		657
		658	static void
		659	loop_init (EV_P_ int methods)
		660	{
453	if (!ev_method)	661	if (!method)
454	{	662	{
455	#if EV_USE_MONOTONIC	663	#if EV_USE_MONOTONIC
456	{	664	{
457	struct timespec ts;	665	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	666	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	667	have_monotonic = 1;
460	}	668	}
461	#endif	669	#endif
462		670
463	ev_now = ev_time ();	671	rt_now = ev_time ();
464	now = get_clock ();	672	mn_now = get_clock ();
		673	now_floor = mn_now;
465	diff = ev_now - now;	674	rtmn_diff = rt_now - mn_now;
466		675
467	if (pipe (sigpipe))	676	if (methods == EVMETHOD_AUTO)
468	return 0;	677	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		678	methods = atoi (getenv ("LIBEV_METHODS"));
		679	else
470	ev_method = EVMETHOD_NONE;	680	methods = EVMETHOD_ANY;
		681
		682	method = 0;
		683	#if EV_USE_WIN32
		684	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		685	#endif
		686	#if EV_USE_KQUEUE
		687	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		688	#endif
471	#if EV_USE_EPOLL	689	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	690	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		691	#endif
		692	#if EV_USE_POLL
		693	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
473	#endif	694	#endif
474	#if EV_USE_SELECT	695	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	696	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	697	#endif
		698	}
		699	}
477		700
		701	void
		702	loop_destroy (EV_P)
		703	{
		704	int i;
		705
		706	#if EV_USE_WIN32
		707	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		708	#endif
		709	#if EV_USE_KQUEUE
		710	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		711	#endif
		712	#if EV_USE_EPOLL
		713	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		714	#endif
		715	#if EV_USE_POLL
		716	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		717	#endif
		718	#if EV_USE_SELECT
		719	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		720	#endif
		721
		722	for (i = NUMPRI; i--; )
		723	array_free (pending, [i]);
		724
		725	array_free (fdchange, );
		726	array_free (timer, );
		727	array_free (periodic, );
		728	array_free (idle, );
		729	array_free (prepare, );
		730	array_free (check, );
		731
		732	method = 0;
		733	/*TODO*/
		734	}
		735
		736	void
		737	loop_fork (EV_P)
		738	{
		739	/*TODO*/
		740	#if EV_USE_EPOLL
		741	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		742	#endif
		743	#if EV_USE_KQUEUE
		744	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		745	#endif
		746	}
		747
		748	#if EV_MULTIPLICITY
		749	struct ev_loop *
		750	ev_loop_new (int methods)
		751	{
		752	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		753
		754	memset (loop, 0, sizeof (struct ev_loop));
		755
		756	loop_init (EV_A_ methods);
		757
		758	if (ev_method (EV_A))
		759	return loop;
		760
		761	return 0;
		762	}
		763
		764	void
		765	ev_loop_destroy (EV_P)
		766	{
		767	loop_destroy (EV_A);
		768	ev_free (loop);
		769	}
		770
		771	void
		772	ev_loop_fork (EV_P)
		773	{
		774	loop_fork (EV_A);
		775	}
		776
		777	#endif
		778
		779	#if EV_MULTIPLICITY
		780	struct ev_loop default_loop_struct;
		781	static struct ev_loop *default_loop;
		782
		783	struct ev_loop *
		784	#else
		785	static int default_loop;
		786
		787	int
		788	#endif
		789	ev_default_loop (int methods)
		790	{
		791	if (sigpipe [0] == sigpipe [1])
		792	if (pipe (sigpipe))
		793	return 0;
		794
		795	if (!default_loop)
		796	{
		797	#if EV_MULTIPLICITY
		798	struct ev_loop *loop = default_loop = &default_loop_struct;
		799	#else
		800	default_loop = 1;
		801	#endif
		802
		803	loop_init (EV_A_ methods);
		804
478	if (ev_method)	805	if (ev_method (EV_A))
479	{	806	{
480	ev_watcher_init (&sigev, sigcb);	807	ev_watcher_init (&sigev, sigcb);
		808	ev_set_priority (&sigev, EV_MAXPRI);
481	siginit ();	809	siginit (EV_A);
482		810
		811	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	812	ev_signal_init (&childev, childcb, SIGCHLD);
		813	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	814	ev_signal_start (EV_A_ &childev);
		815	ev_unref (EV_A); /* child watcher should not keep loop alive */
		816	#endif
485	}	817	}
		818	else
		819	default_loop = 0;
486	}	820	}
487		821
488	return ev_method;	822	return default_loop;
489	}	823	}
490		824
491	/*****************************************************************************/
492
493	void	825	void
494	ev_prefork (void)	826	ev_default_destroy (void)
495	{	827	{
496	/* nop */	828	#if EV_MULTIPLICITY
497	}	829	struct ev_loop *loop = default_loop;
498
499	void
500	ev_postfork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif	830	#endif
512		831
		832	ev_ref (EV_A); /* child watcher */
		833	ev_signal_stop (EV_A_ &childev);
		834
		835	ev_ref (EV_A); /* signal watcher */
513	ev_io_stop (&sigev);	836	ev_io_stop (EV_A_ &sigev);
		837
		838	close (sigpipe [0]); sigpipe [0] = 0;
		839	close (sigpipe [1]); sigpipe [1] = 0;
		840
		841	loop_destroy (EV_A);
		842	}
		843
		844	void
		845	ev_default_fork (void)
		846	{
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *loop = default_loop;
		849	#endif
		850
		851	loop_fork (EV_A);
		852
		853	ev_io_stop (EV_A_ &sigev);
514	close (sigpipe [0]);	854	close (sigpipe [0]);
515	close (sigpipe [1]);	855	close (sigpipe [1]);
516	pipe (sigpipe);	856	pipe (sigpipe);
		857
		858	ev_ref (EV_A); /* signal watcher */
517	siginit ();	859	siginit (EV_A);
518	}	860	}
519		861
520	/*****************************************************************************/	862	/*****************************************************************************/
521		863
522	static void	864	static void
523	call_pending (void)	865	call_pending (EV_P)
524	{	866	{
		867	int pri;
		868
		869	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	870	while (pendingcnt [pri])
526	{	871	{
527	ANPENDING *p = pendings + --pendingcnt;	872	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		873
529	if (p->w)	874	if (p->w)
530	{	875	{
531	p->w->pending = 0;	876	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	877	p->w->cb (EV_A_ p->w, p->events);
533	}	878	}
534	}	879	}
535	}	880	}
536		881
537	static void	882	static void
538	timers_reify (void)	883	timers_reify (EV_P)
539	{	884	{
540	while (timercnt && timers [0]->at <= now)	885	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	886	{
542	struct ev_timer *w = timers [0];	887	struct ev_timer *w = timers [0];
		888
		889	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		890
544	/* first reschedule or stop timer */	891	/* first reschedule or stop timer */
545	if (w->repeat)	892	if (w->repeat)
546	{	893	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	894	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	895	((WT)w)->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	896	downheap ((WT *)timers, timercnt, 0);
550	}	897	}
551	else	898	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	899	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		900
554	event ((W)w, EV_TIMEOUT);	901	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	902	}
556	}	903	}
557		904
558	static void	905	static void
559	periodics_reify (void)	906	periodics_reify (EV_P)
560	{	907	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	908	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
562	{	909	{
563	struct ev_periodic *w = periodics [0];	910	struct ev_periodic *w = periodics [0];
		911
		912	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
564		913
565	/* first reschedule or stop timer */	914	/* first reschedule or stop timer */
566	if (w->interval)	915	if (w->interval)
567	{	916	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	917	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	918	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	919	downheap ((WT *)periodics, periodiccnt, 0);
571	}	920	}
572	else	921	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	922	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		923
575	event ((W)w, EV_PERIODIC);	924	event (EV_A_ (W)w, EV_PERIODIC);
576	}	925	}
577	}	926	}
578		927
579	static void	928	static void
580	periodics_reschedule (ev_tstamp diff)	929	periodics_reschedule (EV_P)
581	{	930	{
582	int i;	931	int i;
583		932
584	/* adjust periodics after time jump */	933	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	934	for (i = 0; i < periodiccnt; ++i)
586	{	935	{
587	struct ev_periodic *w = periodics [i];	936	struct ev_periodic *w = periodics [i];
588		937
589	if (w->interval)	938	if (w->interval)
590	{	939	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	940	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
592		941
593	if (fabs (diff) >= 1e-4)	942	if (fabs (diff) >= 1e-4)
594	{	943	{
595	ev_periodic_stop (w);	944	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	945	ev_periodic_start (EV_A_ w);
597		946
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	947	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	948	}
600	}	949	}
601	}	950	}
602	}	951	}
603		952
		953	inline int
		954	time_update_monotonic (EV_P)
		955	{
		956	mn_now = get_clock ();
		957
		958	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		959	{
		960	rt_now = rtmn_diff + mn_now;
		961	return 0;
		962	}
		963	else
		964	{
		965	now_floor = mn_now;
		966	rt_now = ev_time ();
		967	return 1;
		968	}
		969	}
		970
604	static void	971	static void
605	time_update (void)	972	time_update (EV_P)
606	{	973	{
607	int i;	974	int i;
608		975
609	ev_now = ev_time ();	976	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	977	if (expect_true (have_monotonic))
612	{	978	{
613	ev_tstamp odiff = diff;	979	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	980	{
617	now = get_clock ();	981	ev_tstamp odiff = rtmn_diff;
		982
		983	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		984	{
618	diff = ev_now - now;	985	rtmn_diff = rt_now - mn_now;
619		986
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	987	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	988	return; /* all is well */
622		989
623	ev_now = ev_time ();	990	rt_now = ev_time ();
		991	mn_now = get_clock ();
		992	now_floor = mn_now;
		993	}
		994
		995	periodics_reschedule (EV_A);
		996	/* no timer adjustment, as the monotonic clock doesn't jump */
		997	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
624	}	998	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	999	}
629	else	1000	else
		1001	#endif
630	{	1002	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1003	rt_now = ev_time ();
		1004
		1005	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
632	{	1006	{
633	periodics_reschedule (ev_now - now);	1007	periodics_reschedule (EV_A);
634		1008
635	/* adjust timers. this is easy, as the offset is the same for all */	1009	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	1010	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	1011	((WT)timers [i])->at += rt_now - mn_now;
638	}	1012	}
639		1013
640	now = ev_now;	1014	mn_now = rt_now;
641	}	1015	}
642	}	1016	}
643		1017
644	int ev_loop_done;	1018	void
		1019	ev_ref (EV_P)
		1020	{
		1021	++activecnt;
		1022	}
645		1023
		1024	void
		1025	ev_unref (EV_P)
		1026	{
		1027	--activecnt;
		1028	}
		1029
		1030	static int loop_done;
		1031
		1032	void
646	void ev_loop (int flags)	1033	ev_loop (EV_P_ int flags)
647	{	1034	{
648	double block;	1035	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1036	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650		1037
651	do	1038	do
652	{	1039	{
653	/* queue check watchers (and execute them) */	1040	/* queue check watchers (and execute them) */
654	if (preparecnt)	1041	if (expect_false (preparecnt))
655	{	1042	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1043	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	1044	call_pending (EV_A);
658	}	1045	}
659		1046
660	/* update fd-related kernel structures */	1047	/* update fd-related kernel structures */
661	fd_reify ();	1048	fd_reify (EV_A);
662		1049
663	/* calculate blocking time */	1050	/* calculate blocking time */
664		1051
665	/* we only need this for !monotonic clockor timers, but as we basically	1052	/* we only need this for !monotonic clockor timers, but as we basically
666	always have timers, we just calculate it always */	1053	always have timers, we just calculate it always */
		1054	#if EV_USE_MONOTONIC
		1055	if (expect_true (have_monotonic))
		1056	time_update_monotonic (EV_A);
		1057	else
		1058	#endif
		1059	{
667	ev_now = ev_time ();	1060	rt_now = ev_time ();
		1061	mn_now = rt_now;
		1062	}
668		1063
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	1064	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	1065	block = 0.;
671	else	1066	else
672	{	1067	{
673	block = MAX_BLOCKTIME;	1068	block = MAX_BLOCKTIME;
674		1069
675	if (timercnt)	1070	if (timercnt)
676	{	1071	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1072	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
678	if (block > to) block = to;	1073	if (block > to) block = to;
679	}	1074	}
680		1075
681	if (periodiccnt)	1076	if (periodiccnt)
682	{	1077	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1078	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
684	if (block > to) block = to;	1079	if (block > to) block = to;
685	}	1080	}
686		1081
687	if (block < 0.) block = 0.;	1082	if (block < 0.) block = 0.;
688	}	1083	}
689		1084
690	method_poll (block);	1085	method_poll (EV_A_ block);
691		1086
692	/* update ev_now, do magic */	1087	/* update rt_now, do magic */
693	time_update ();	1088	time_update (EV_A);
694		1089
695	/* queue pending timers and reschedule them */	1090	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1091	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	1092	periodics_reify (EV_A); /* absolute timers called first */
698		1093
699	/* queue idle watchers unless io or timers are pending */	1094	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1095	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1096	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1097
703	/* queue check watchers, to be executed first */	1098	/* queue check watchers, to be executed first */
704	if (checkcnt)	1099	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1100	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1101
707	call_pending ();	1102	call_pending (EV_A);
708	}	1103	}
709	while (!ev_loop_done);	1104	while (activecnt && !loop_done);
710		1105
711	if (ev_loop_done != 2)	1106	if (loop_done != 2)
712	ev_loop_done = 0;	1107	loop_done = 0;
		1108	}
		1109
		1110	void
		1111	ev_unloop (EV_P_ int how)
		1112	{
		1113	loop_done = how;
713	}	1114	}
714		1115
715	/*****************************************************************************/	1116	/*****************************************************************************/
716		1117
717	static void	1118	inline void
718	wlist_add (WL *head, WL elem)	1119	wlist_add (WL *head, WL elem)
719	{	1120	{
720	elem->next = *head;	1121	elem->next = *head;
721	*head = elem;	1122	*head = elem;
722	}	1123	}
723		1124
724	static void	1125	inline void
725	wlist_del (WL *head, WL elem)	1126	wlist_del (WL *head, WL elem)
726	{	1127	{
727	while (*head)	1128	while (*head)
728	{	1129	{
729	if (*head == elem)	1130	if (*head == elem)
…		…
734		1135
735	head = &(*head)->next;	1136	head = &(*head)->next;
736	}	1137	}
737	}	1138	}
738		1139
739	static void	1140	inline void
740	ev_clear_pending (W w)	1141	ev_clear_pending (EV_P_ W w)
741	{	1142	{
742	if (w->pending)	1143	if (w->pending)
743	{	1144	{
744	pendings [w->pending - 1].w = 0;	1145	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1146	w->pending = 0;
746	}	1147	}
747	}	1148	}
748		1149
749	static void	1150	inline void
750	ev_start (W w, int active)	1151	ev_start (EV_P_ W w, int active)
751	{	1152	{
		1153	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1154	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1155
752	w->active = active;	1156	w->active = active;
		1157	ev_ref (EV_A);
753	}	1158	}
754		1159
755	static void	1160	inline void
756	ev_stop (W w)	1161	ev_stop (EV_P_ W w)
757	{	1162	{
		1163	ev_unref (EV_A);
758	w->active = 0;	1164	w->active = 0;
759	}	1165	}
760		1166
761	/*****************************************************************************/	1167	/*****************************************************************************/
762		1168
763	void	1169	void
764	ev_io_start (struct ev_io *w)	1170	ev_io_start (EV_P_ struct ev_io *w)
765	{	1171	{
		1172	int fd = w->fd;
		1173
766	if (ev_is_active (w))	1174	if (ev_is_active (w))
767	return;	1175	return;
768		1176
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1177	assert (("ev_io_start called with negative fd", fd >= 0));
772		1178
773	ev_start ((W)w, 1);	1179	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1180	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1181	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1182
777	fd_change (fd);	1183	fd_change (EV_A_ fd);
778	}	1184	}
779		1185
780	void	1186	void
781	ev_io_stop (struct ev_io *w)	1187	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1188	{
783	ev_clear_pending ((W)w);	1189	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1190	if (!ev_is_active (w))
785	return;	1191	return;
786		1192
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1193	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1194	ev_stop (EV_A_ (W)w);
789		1195
790	fd_change (w->fd);	1196	fd_change (EV_A_ w->fd);
791	}	1197	}
792		1198
793	void	1199	void
794	ev_timer_start (struct ev_timer *w)	1200	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1201	{
796	if (ev_is_active (w))	1202	if (ev_is_active (w))
797	return;	1203	return;
798		1204
799	w->at += now;	1205	((WT)w)->at += mn_now;
800		1206
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1207	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1208
803	ev_start ((W)w, ++timercnt);	1209	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1210	array_needsize (timers, timermax, timercnt, );
805	timers [timercnt - 1] = w;	1211	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1212	upheap ((WT *)timers, timercnt - 1);
807	}
808		1213
		1214	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1215	}
		1216
809	void	1217	void
810	ev_timer_stop (struct ev_timer *w)	1218	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1219	{
812	ev_clear_pending ((W)w);	1220	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1221	if (!ev_is_active (w))
814	return;	1222	return;
815		1223
		1224	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1225
816	if (w->active < timercnt--)	1226	if (((W)w)->active < timercnt--)
817	{	1227	{
818	timers [w->active - 1] = timers [timercnt];	1228	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1229	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1230	}
821		1231
822	w->at = w->repeat;	1232	((WT)w)->at = w->repeat;
823		1233
824	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
825	}	1235	}
826		1236
827	void	1237	void
828	ev_timer_again (struct ev_timer *w)	1238	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1239	{
830	if (ev_is_active (w))	1240	if (ev_is_active (w))
831	{	1241	{
832	if (w->repeat)	1242	if (w->repeat)
833	{	1243	{
834	w->at = now + w->repeat;	1244	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
836	}	1246	}
837	else	1247	else
838	ev_timer_stop (w);	1248	ev_timer_stop (EV_A_ w);
839	}	1249	}
840	else if (w->repeat)	1250	else if (w->repeat)
841	ev_timer_start (w);	1251	ev_timer_start (EV_A_ w);
842	}	1252	}
843		1253
844	void	1254	void
845	ev_periodic_start (struct ev_periodic *w)	1255	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1256	{
847	if (ev_is_active (w))	1257	if (ev_is_active (w))
848	return;	1258	return;
849		1259
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1260	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1261
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1262	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)	1263	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1264	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
855		1265
856	ev_start ((W)w, ++periodiccnt);	1266	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1267	array_needsize (periodics, periodicmax, periodiccnt, );
858	periodics [periodiccnt - 1] = w;	1268	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1269	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1270
		1271	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1272	}
		1273
862	void	1274	void
863	ev_periodic_stop (struct ev_periodic *w)	1275	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1276	{
865	ev_clear_pending ((W)w);	1277	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1278	if (!ev_is_active (w))
867	return;	1279	return;
868		1280
		1281	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1282
869	if (w->active < periodiccnt--)	1283	if (((W)w)->active < periodiccnt--)
870	{	1284	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1285	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1286	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1287	}
874		1288
875	ev_stop ((W)w);	1289	ev_stop (EV_A_ (W)w);
876	}	1290	}
877		1291
878	void	1292	void
879	ev_signal_start (struct ev_signal *w)	1293	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1294	{
881	if (ev_is_active (w))	1295	if (ev_is_active (w))
882	return;	1296	return;
883		1297
		1298	ev_start (EV_A_ (W)w, ++idlecnt);
		1299	array_needsize (idles, idlemax, idlecnt, );
		1300	idles [idlecnt - 1] = w;
		1301	}
		1302
		1303	void
		1304	ev_idle_stop (EV_P_ struct ev_idle *w)
		1305	{
		1306	ev_clear_pending (EV_A_ (W)w);
		1307	if (ev_is_active (w))
		1308	return;
		1309
		1310	idles [((W)w)->active - 1] = idles [--idlecnt];
		1311	ev_stop (EV_A_ (W)w);
		1312	}
		1313
		1314	void
		1315	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1316	{
		1317	if (ev_is_active (w))
		1318	return;
		1319
		1320	ev_start (EV_A_ (W)w, ++preparecnt);
		1321	array_needsize (prepares, preparemax, preparecnt, );
		1322	prepares [preparecnt - 1] = w;
		1323	}
		1324
		1325	void
		1326	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1327	{
		1328	ev_clear_pending (EV_A_ (W)w);
		1329	if (ev_is_active (w))
		1330	return;
		1331
		1332	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1333	ev_stop (EV_A_ (W)w);
		1334	}
		1335
		1336	void
		1337	ev_check_start (EV_P_ struct ev_check *w)
		1338	{
		1339	if (ev_is_active (w))
		1340	return;
		1341
		1342	ev_start (EV_A_ (W)w, ++checkcnt);
		1343	array_needsize (checks, checkmax, checkcnt, );
		1344	checks [checkcnt - 1] = w;
		1345	}
		1346
		1347	void
		1348	ev_check_stop (EV_P_ struct ev_check *w)
		1349	{
		1350	ev_clear_pending (EV_A_ (W)w);
		1351	if (ev_is_active (w))
		1352	return;
		1353
		1354	checks [((W)w)->active - 1] = checks [--checkcnt];
		1355	ev_stop (EV_A_ (W)w);
		1356	}
		1357
		1358	#ifndef SA_RESTART
		1359	# define SA_RESTART 0
		1360	#endif
		1361
		1362	void
		1363	ev_signal_start (EV_P_ struct ev_signal *w)
		1364	{
		1365	#if EV_MULTIPLICITY
		1366	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1367	#endif
		1368	if (ev_is_active (w))
		1369	return;
		1370
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1371	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1372
886	ev_start ((W)w, 1);	1373	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1374	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1375	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1376
890	if (!w->next)	1377	if (!((WL)w)->next)
891	{	1378	{
		1379	#if WIN32
		1380	signal (w->signum, sighandler);
		1381	#else
892	struct sigaction sa;	1382	struct sigaction sa;
893	sa.sa_handler = sighandler;	1383	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1384	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1385	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1386	sigaction (w->signum, &sa, 0);
		1387	#endif
897	}	1388	}
898	}	1389	}
899		1390
900	void	1391	void
901	ev_signal_stop (struct ev_signal *w)	1392	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1393	{
903	ev_clear_pending ((W)w);	1394	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1395	if (!ev_is_active (w))
905	return;	1396	return;
906		1397
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1398	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1399	ev_stop (EV_A_ (W)w);
909		1400
910	if (!signals [w->signum - 1].head)	1401	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1402	signal (w->signum, SIG_DFL);
912	}	1403	}
913		1404
914	void	1405	void
915	ev_idle_start (struct ev_idle *w)	1406	ev_child_start (EV_P_ struct ev_child *w)
916	{	1407	{
		1408	#if EV_MULTIPLICITY
		1409	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1410	#endif
917	if (ev_is_active (w))	1411	if (ev_is_active (w))
918	return;	1412	return;
919		1413
920	ev_start ((W)w, ++idlecnt);	1414	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1415	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1416	}
924		1417
925	void	1418	void
926	ev_idle_stop (struct ev_idle *w)	1419	ev_child_stop (EV_P_ struct ev_child *w)
927	{	1420	{
928	ev_clear_pending ((W)w);	1421	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1422	if (ev_is_active (w))
930	return;	1423	return;
931		1424
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)
982	{
983	if (ev_is_active (w))
984	return;
985
986	ev_start ((W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}
989
990	void
991	ev_child_stop (struct ev_child *w)
992	{
993	ev_clear_pending ((W)w);
994	if (ev_is_active (w))
995	return;
996
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1425	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1426	ev_stop (EV_A_ (W)w);
999	}	1427	}
1000		1428
1001	/*****************************************************************************/	1429	/*****************************************************************************/
1002		1430
1003	struct ev_once	1431	struct ev_once
…		…
1007	void (*cb)(int revents, void *arg);	1435	void (*cb)(int revents, void *arg);
1008	void *arg;	1436	void *arg;
1009	};	1437	};
1010		1438
1011	static void	1439	static void
1012	once_cb (struct ev_once *once, int revents)	1440	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1441	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1442	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1443	void *arg = once->arg;
1016		1444
1017	ev_io_stop (&once->io);	1445	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1446	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1447	ev_free (once);
1020		1448
1021	cb (revents, arg);	1449	cb (revents, arg);
1022	}	1450	}
1023		1451
1024	static void	1452	static void
1025	once_cb_io (struct ev_io *w, int revents)	1453	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1454	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1455	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	1456	}
1029		1457
1030	static void	1458	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1459	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1460	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1461	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	1462	}
1035		1463
1036	void	1464	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1465	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	1466	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1467	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1040		1468
1041	if (!once)	1469	if (!once)
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1470	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1043	else	1471	else
1044	{	1472	{
…		…
1047		1475
1048	ev_watcher_init (&once->io, once_cb_io);	1476	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1477	if (fd >= 0)
1050	{	1478	{
1051	ev_io_set (&once->io, fd, events);	1479	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1480	ev_io_start (EV_A_ &once->io);
1053	}	1481	}
1054		1482
1055	ev_watcher_init (&once->to, once_cb_to);	1483	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1484	if (timeout >= 0.)
1057	{	1485	{
1058	ev_timer_set (&once->to, timeout, 0.);	1486	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1487	ev_timer_start (EV_A_ &once->to);
1060	}	1488	}
1061	}	1489	}
1062	}	1490	}
1063		1491
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}
1141
1142	#endif
1143
1144
1145
1146

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