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Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs.
Revision 1.73 by root, Tue Nov 6 16:27:10 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>
36	#include <fcntl.h>	59	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	60	#include <stddef.h>
39		61
40	#include <stdio.h>	62	#include <stdio.h>
41		63
42	#include <assert.h>	64	#include <assert.h>
43	#include <errno.h>	65	#include <errno.h>
44	#include <sys/types.h>	66	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	67	#include <time.h>
48		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
49	#ifndef EV_USE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	80	#endif
54		81
55	#ifndef EV_USE_SELECT	82	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	83	# define EV_USE_SELECT 1
57	#endif	84	#endif
58		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
59	#ifndef EV_USE_EPOLL	90	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	91	# define EV_USE_EPOLL 0
61	#endif	92	#endif
62		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
		105	# endif
		106	#endif
		107
		108	#ifndef EV_USE_REALTIME
		109	# define EV_USE_REALTIME 1
		110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
63	#ifndef CLOCK_REALTIME	119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	121	# define EV_USE_REALTIME 0
65	#endif	122	#endif
66	#ifndef EV_USE_REALTIME	123
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	124	/**/
68	#endif
69		125
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	127	#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 */	128	#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 */	129	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		130
75	#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)
76		146
77	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
80		150
81	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84		152
85	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
86
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		154
91	/*****************************************************************************/	155	/*****************************************************************************/
92		156
93	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
94	ev_time (void)	239	ev_time (void)
95	{	240	{
96	#if EV_USE_REALTIME	241	#if EV_USE_REALTIME
97	struct timespec ts;	242	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	249	#endif
105	}	250	}
106		251
107	static ev_tstamp	252	inline ev_tstamp
108	get_clock (void)	253	get_clock (void)
109	{	254	{
110	#if EV_USE_MONOTONIC	255	#if EV_USE_MONOTONIC
111	if (have_monotonic)	256	if (expect_true (have_monotonic))
112	{	257	{
113	struct timespec ts;	258	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	261	}
117	#endif	262	#endif
118		263
119	return ev_time ();	264	return ev_time ();
120	}	265	}
121		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	273	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		274
124	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
126	{ \	277	{ \
127	int newcnt = cur; \	278	int newcnt = cur; \
128	do \	279	do \
129	{ \	280	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	281	newcnt = array_roundsize (base, newcnt << 1); \
131	} \	282	} \
132	while ((cnt) > newcnt); \	283	while ((cnt) > newcnt); \
133	\	284	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	285	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
135	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	287	cur = newcnt; \
137	}	288	}
		289
		290	#define array_slim(stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = ev_realloc (base, sizeof (*base) * (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;
138		305
139	/*****************************************************************************/	306	/*****************************************************************************/
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		307
151	static void	308	static void
152	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
153	{	310	{
154	while (count--)	311	while (count--)
…		…
159		316
160	++base;	317	++base;
161	}	318	}
162	}	319	}
163		320
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	321	static void
174	event (W w, int events)	322	event (EV_P_ W w, int events)
175	{	323	{
176	if (w->pending)	324	if (w->pending)
177	{	325	{
178	pendings [w->pending - 1].events |= events;	326	pendings [ABSPRI (w)][w->pending - 1].events |= events;
179	return;	327	return;
180	}	328	}
181		329
182	w->pending = ++pendingcnt;	330	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	331	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
184	pendings [pendingcnt - 1].w = w;	332	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	333	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	334	}
187		335
188	static void	336	static void
189	queue_events (W *events, int eventcnt, int type)	337	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	338	{
191	int i;	339	int i;
192		340
193	for (i = 0; i < eventcnt; ++i)	341	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	342	event (EV_A_ events [i], type);
195	}	343	}
196		344
197	static void	345	static void
198	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
199	{	347	{
200	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	349	struct ev_io *w;
202		350
203	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
204	{	352	{
205	int ev = w->events & events;	353	int ev = w->events & events;
206		354
207	if (ev)	355	if (ev)
208	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
209	}	357	}
210	}	358	}
211		359
212	/*****************************************************************************/	360	/*****************************************************************************/
213		361
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	362	static void
218	fd_reify (void)	363	fd_reify (EV_P)
219	{	364	{
220	int i;	365	int i;
221		366
222	for (i = 0; i < fdchangecnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
223	{	368	{
…		…
225	ANFD *anfd = anfds + fd;	370	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	371	struct ev_io *w;
227		372
228	int events = 0;	373	int events = 0;
229		374
230	for (w = anfd->head; w; w = w->next)	375	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
231	events |= w->events;	376	events |= w->events;
232		377
233	anfd->reify = 0;	378	anfd->reify = 0;
234		379
235	if (anfd->events != events)
236	{
237	method_modify (fd, anfd->events, events);	380	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	381	anfd->events = events;
239	}
240	}	382	}
241		383
242	fdchangecnt = 0;	384	fdchangecnt = 0;
243	}	385	}
244		386
245	static void	387	static void
246	fd_change (int fd)	388	fd_change (EV_P_ int fd)
247	{	389	{
248	if (anfds [fd].reify || fdchangecnt < 0)	390	if (anfds [fd].reify)
249	return;	391	return;
250		392
251	anfds [fd].reify = 1;	393	anfds [fd].reify = 1;
252		394
253	++fdchangecnt;	395	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	396	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
255	fdchanges [fdchangecnt - 1] = fd;	397	fdchanges [fdchangecnt - 1] = fd;
256	}	398	}
257		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
		420	}
		421
258	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
259	static void	423	static void
260	fd_recheck (void)	424	fd_ebadf (EV_P)
261	{	425	{
262	int fd;	426	int fd;
263		427
264	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	429	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
267	while (anfds [fd].head)	431	fd_kill (EV_A_ fd);
		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)
268	{	442	{
269	ev_io_stop (anfds [fd].head);	443	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	444	return;
271	}	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	}
272	}	461	}
273		462
274	/*****************************************************************************/	463	/*****************************************************************************/
275		464
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	465	static void
283	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
284	{	467	{
285	WT w = timers [k];	468	WT w = heap [k];
286		469
287	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
288	{	471	{
289	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
291	k >>= 1;	474	k >>= 1;
292	}	475	}
293		476
294	timers [k] = w;	477	heap [k] = w;
295	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
296		479
297	}	480	}
298		481
299	static void	482	static void
300	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
301	{	484	{
302	WT w = timers [k];	485	WT w = heap [k];
303		486
304	while (k < (N >> 1))	487	while (k < (N >> 1))
305	{	488	{
306	int j = k << 1;	489	int j = k << 1;
307		490
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	492	++j;
310		493
311	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
312	break;	495	break;
313		496
314	timers [k] = timers [j];	497	heap [k] = heap [j];
315	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
316	k = j;	499	k = j;
317	}	500	}
318		501
319	timers [k] = w;	502	heap [k] = w;
320	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
321	}	504	}
322		505
323	/*****************************************************************************/	506	/*****************************************************************************/
324		507
325	typedef struct	508	typedef struct
326	{	509	{
327	struct ev_signal *head;	510	WL head;
328	sig_atomic_t volatile gotsig;	511	sig_atomic_t volatile gotsig;
329	} ANSIG;	512	} ANSIG;
330		513
331	static ANSIG *signals;	514	static ANSIG *signals;
332	static int signalmax;	515	static int signalmax;
…		…
348	}	531	}
349		532
350	static void	533	static void
351	sighandler (int signum)	534	sighandler (int signum)
352	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
353	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
354		541
355	if (!gotsig)	542	if (!gotsig)
356	{	543	{
		544	int old_errno = errno;
357	gotsig = 1;	545	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	546	write (sigpipe [1], &signum, 1);
		547	errno = old_errno;
359	}	548	}
360	}	549	}
361		550
362	static void	551	static void
363	sigcb (struct ev_io *iow, int revents)	552	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	553	{
365	struct ev_signal *w;	554	WL w;
366	int sig;	555	int signum;
367		556
368	read (sigpipe [0], &revents, 1);	557	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	558	gotsig = 0;
370		559
371	for (sig = signalmax; sig--; )	560	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	561	if (signals [signum].gotsig)
373	{	562	{
374	signals [sig].gotsig = 0;	563	signals [signum].gotsig = 0;
375		564
376	for (w = signals [sig].head; w; w = w->next)	565	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	566	event (EV_A_ (W)w, EV_SIGNAL);
378	}	567	}
379	}	568	}
380		569
381	static void	570	static void
382	siginit (void)	571	siginit (EV_P)
383	{	572	{
		573	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	574	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	575	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		576
387	/* rather than sort out wether we really need nb, set it */	577	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	578	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	579	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		580	#endif
390		581
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	582	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	583	ev_io_start (EV_A_ &sigev);
		584	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	585	}
394		586
395	/*****************************************************************************/	587	/*****************************************************************************/
396		588
397	static struct ev_idle **idles;
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
408	static struct ev_child *childs [PID_HASHSIZE];	589	static struct ev_child *childs [PID_HASHSIZE];
		590
		591	#ifndef WIN32
		592
409	static struct ev_signal childev;	593	static struct ev_signal childev;
410		594
411	#ifndef WCONTINUED	595	#ifndef WCONTINUED
412	# define WCONTINUED 0	596	# define WCONTINUED 0
413	#endif	597	#endif
414		598
415	static void	599	static void
416	childcb (struct ev_signal *sw, int revents)	600	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	601	{
418	struct ev_child *w;	602	struct ev_child *w;
		603
		604	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		605	if (w->pid == pid || !w->pid)
		606	{
		607	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		608	w->rpid = pid;
		609	w->rstatus = status;
		610	event (EV_A_ (W)w, EV_CHILD);
		611	}
		612	}
		613
		614	static void
		615	childcb (EV_P_ struct ev_signal *sw, int revents)
		616	{
419	int pid, status;	617	int pid, status;
420		618
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	619	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	620	{
423	if (w->pid == pid || w->pid == -1)	621	/* make sure we are called again until all childs have been reaped */
424	{	622	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	623
426	event ((W)w, EV_CHILD);	624	child_reap (EV_A_ sw, pid, pid, status);
427	}	625	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		626	}
428	}	627	}
		628
		629	#endif
429		630
430	/*****************************************************************************/	631	/*****************************************************************************/
431		632
		633	#if EV_USE_KQUEUE
		634	# include "ev_kqueue.c"
		635	#endif
432	#if EV_USE_EPOLL	636	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	637	# include "ev_epoll.c"
434	#endif	638	#endif
		639	#if EV_USE_POLL
		640	# include "ev_poll.c"
		641	#endif
435	#if EV_USE_SELECT	642	#if EV_USE_SELECT
436	# include "ev_select.c"	643	# include "ev_select.c"
437	#endif	644	#endif
438		645
439	int	646	int
…		…
446	ev_version_minor (void)	653	ev_version_minor (void)
447	{	654	{
448	return EV_VERSION_MINOR;	655	return EV_VERSION_MINOR;
449	}	656	}
450		657
451	int ev_init (int flags)	658	/* return true if we are running with elevated privileges and should ignore env variables */
		659	static int
		660	enable_secure (void)
452	{	661	{
		662	#ifdef WIN32
		663	return 0;
		664	#else
		665	return getuid () != geteuid ()
		666	|| getgid () != getegid ();
		667	#endif
		668	}
		669
		670	int
		671	ev_method (EV_P)
		672	{
		673	return method;
		674	}
		675
		676	static void
		677	loop_init (EV_P_ int methods)
		678	{
453	if (!ev_method)	679	if (!method)
454	{	680	{
455	#if EV_USE_MONOTONIC	681	#if EV_USE_MONOTONIC
456	{	682	{
457	struct timespec ts;	683	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	684	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	685	have_monotonic = 1;
460	}	686	}
461	#endif	687	#endif
462		688
463	ev_now = ev_time ();	689	rt_now = ev_time ();
464	now = get_clock ();	690	mn_now = get_clock ();
		691	now_floor = mn_now;
465	diff = ev_now - now;	692	rtmn_diff = rt_now - mn_now;
466		693
467	if (pipe (sigpipe))	694	if (methods == EVMETHOD_AUTO)
468	return 0;	695	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		696	methods = atoi (getenv ("LIBEV_METHODS"));
		697	else
470	ev_method = EVMETHOD_NONE;	698	methods = EVMETHOD_ANY;
		699
		700	method = 0;
		701	#if EV_USE_WIN32
		702	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		703	#endif
		704	#if EV_USE_KQUEUE
		705	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		706	#endif
471	#if EV_USE_EPOLL	707	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	708	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		709	#endif
		710	#if EV_USE_POLL
		711	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
473	#endif	712	#endif
474	#if EV_USE_SELECT	713	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	714	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	715	#endif
477		716
		717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
		719	}
		720	}
		721
		722	void
		723	loop_destroy (EV_P)
		724	{
		725	int i;
		726
		727	#if EV_USE_WIN32
		728	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		729	#endif
		730	#if EV_USE_KQUEUE
		731	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		732	#endif
		733	#if EV_USE_EPOLL
		734	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		735	#endif
		736	#if EV_USE_POLL
		737	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		738	#endif
		739	#if EV_USE_SELECT
		740	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		741	#endif
		742
		743	for (i = NUMPRI; i--; )
		744	array_free (pending, [i]);
		745
		746	/* have to use the microsoft-never-gets-it-right macro */
		747	array_free_microshit (fdchange);
		748	array_free_microshit (timer);
		749	array_free_microshit (periodic);
		750	array_free_microshit (idle);
		751	array_free_microshit (prepare);
		752	array_free_microshit (check);
		753
		754	method = 0;
		755	}
		756
		757	static void
		758	loop_fork (EV_P)
		759	{
		760	#if EV_USE_EPOLL
		761	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		762	#endif
		763	#if EV_USE_KQUEUE
		764	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		765	#endif
		766
		767	if (ev_is_active (&sigev))
		768	{
		769	/* default loop */
		770
		771	ev_ref (EV_A);
		772	ev_io_stop (EV_A_ &sigev);
		773	close (sigpipe [0]);
		774	close (sigpipe [1]);
		775
		776	while (pipe (sigpipe))
		777	syserr ("(libev) error creating pipe");
		778
		779	siginit (EV_A);
		780	}
		781
		782	postfork = 0;
		783	}
		784
		785	#if EV_MULTIPLICITY
		786	struct ev_loop *
		787	ev_loop_new (int methods)
		788	{
		789	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		790
		791	memset (loop, 0, sizeof (struct ev_loop));
		792
		793	loop_init (EV_A_ methods);
		794
		795	if (ev_method (EV_A))
		796	return loop;
		797
		798	return 0;
		799	}
		800
		801	void
		802	ev_loop_destroy (EV_P)
		803	{
		804	loop_destroy (EV_A);
		805	ev_free (loop);
		806	}
		807
		808	void
		809	ev_loop_fork (EV_P)
		810	{
		811	postfork = 1;
		812	}
		813
		814	#endif
		815
		816	#if EV_MULTIPLICITY
		817	struct ev_loop default_loop_struct;
		818	static struct ev_loop *default_loop;
		819
		820	struct ev_loop *
		821	#else
		822	static int default_loop;
		823
		824	int
		825	#endif
		826	ev_default_loop (int methods)
		827	{
		828	if (sigpipe [0] == sigpipe [1])
		829	if (pipe (sigpipe))
		830	return 0;
		831
		832	if (!default_loop)
		833	{
		834	#if EV_MULTIPLICITY
		835	struct ev_loop *loop = default_loop = &default_loop_struct;
		836	#else
		837	default_loop = 1;
		838	#endif
		839
		840	loop_init (EV_A_ methods);
		841
478	if (ev_method)	842	if (ev_method (EV_A))
479	{	843	{
480	ev_watcher_init (&sigev, sigcb);
481	siginit ();	844	siginit (EV_A);
482		845
		846	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	847	ev_signal_init (&childev, childcb, SIGCHLD);
		848	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	849	ev_signal_start (EV_A_ &childev);
		850	ev_unref (EV_A); /* child watcher should not keep loop alive */
		851	#endif
485	}	852	}
		853	else
		854	default_loop = 0;
486	}	855	}
487		856
488	return ev_method;	857	return default_loop;
		858	}
		859
		860	void
		861	ev_default_destroy (void)
		862	{
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *loop = default_loop;
		865	#endif
		866
		867	#ifndef WIN32
		868	ev_ref (EV_A); /* child watcher */
		869	ev_signal_stop (EV_A_ &childev);
		870	#endif
		871
		872	ev_ref (EV_A); /* signal watcher */
		873	ev_io_stop (EV_A_ &sigev);
		874
		875	close (sigpipe [0]); sigpipe [0] = 0;
		876	close (sigpipe [1]); sigpipe [1] = 0;
		877
		878	loop_destroy (EV_A);
		879	}
		880
		881	void
		882	ev_default_fork (void)
		883	{
		884	#if EV_MULTIPLICITY
		885	struct ev_loop *loop = default_loop;
		886	#endif
		887
		888	if (method)
		889	postfork = 1;
489	}	890	}
490		891
491	/*****************************************************************************/	892	/*****************************************************************************/
492		893
493	void
494	ev_fork_prepare (void)
495	{
496	/* nop */
497	}
498
499	void
500	ev_fork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_fork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif
512
513	ev_io_stop (&sigev);
514	close (sigpipe [0]);
515	close (sigpipe [1]);
516	pipe (sigpipe);
517	siginit ();
518	}
519
520	/*****************************************************************************/
521
522	static void	894	static void
523	call_pending (void)	895	call_pending (EV_P)
524	{	896	{
		897	int pri;
		898
		899	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	900	while (pendingcnt [pri])
526	{	901	{
527	ANPENDING *p = pendings + --pendingcnt;	902	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		903
529	if (p->w)	904	if (p->w)
530	{	905	{
531	p->w->pending = 0;	906	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	907	p->w->cb (EV_A_ p->w, p->events);
533	}	908	}
534	}	909	}
535	}	910	}
536		911
537	static void	912	static void
538	timers_reify (void)	913	timers_reify (EV_P)
539	{	914	{
540	while (timercnt && timers [0]->at <= now)	915	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	916	{
542	struct ev_timer *w = timers [0];	917	struct ev_timer *w = timers [0];
		918
		919	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		920
544	/* first reschedule or stop timer */	921	/* first reschedule or stop timer */
545	if (w->repeat)	922	if (w->repeat)
546	{	923	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	924	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	925	((WT)w)->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	926	downheap ((WT *)timers, timercnt, 0);
550	}	927	}
551	else	928	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	929	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		930
554	event ((W)w, EV_TIMEOUT);	931	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	932	}
556	}	933	}
557		934
558	static void	935	static void
559	periodics_reify (void)	936	periodics_reify (EV_P)
560	{	937	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	938	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
562	{	939	{
563	struct ev_periodic *w = periodics [0];	940	struct ev_periodic *w = periodics [0];
		941
		942	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
564		943
565	/* first reschedule or stop timer */	944	/* first reschedule or stop timer */
566	if (w->interval)	945	if (w->interval)
567	{	946	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	947	((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));	948	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	949	downheap ((WT *)periodics, periodiccnt, 0);
571	}	950	}
572	else	951	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	952	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		953
575	event ((W)w, EV_PERIODIC);	954	event (EV_A_ (W)w, EV_PERIODIC);
576	}	955	}
577	}	956	}
578		957
579	static void	958	static void
580	periodics_reschedule (ev_tstamp diff)	959	periodics_reschedule (EV_P)
581	{	960	{
582	int i;	961	int i;
583		962
584	/* adjust periodics after time jump */	963	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	964	for (i = 0; i < periodiccnt; ++i)
586	{	965	{
587	struct ev_periodic *w = periodics [i];	966	struct ev_periodic *w = periodics [i];
588		967
589	if (w->interval)	968	if (w->interval)
590	{	969	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	970	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
592		971
593	if (fabs (diff) >= 1e-4)	972	if (fabs (diff) >= 1e-4)
594	{	973	{
595	ev_periodic_stop (w);	974	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	975	ev_periodic_start (EV_A_ w);
597		976
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	977	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	978	}
600	}	979	}
601	}	980	}
602	}	981	}
603		982
		983	inline int
		984	time_update_monotonic (EV_P)
		985	{
		986	mn_now = get_clock ();
		987
		988	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		989	{
		990	rt_now = rtmn_diff + mn_now;
		991	return 0;
		992	}
		993	else
		994	{
		995	now_floor = mn_now;
		996	rt_now = ev_time ();
		997	return 1;
		998	}
		999	}
		1000
604	static void	1001	static void
605	time_update (void)	1002	time_update (EV_P)
606	{	1003	{
607	int i;	1004	int i;
608		1005
609	ev_now = ev_time ();	1006	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	1007	if (expect_true (have_monotonic))
612	{	1008	{
613	ev_tstamp odiff = diff;	1009	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	1010	{
617	now = get_clock ();	1011	ev_tstamp odiff = rtmn_diff;
		1012
		1013	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1014	{
618	diff = ev_now - now;	1015	rtmn_diff = rt_now - mn_now;
619		1016
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1017	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	1018	return; /* all is well */
622		1019
623	ev_now = ev_time ();	1020	rt_now = ev_time ();
		1021	mn_now = get_clock ();
		1022	now_floor = mn_now;
		1023	}
		1024
		1025	periodics_reschedule (EV_A);
		1026	/* no timer adjustment, as the monotonic clock doesn't jump */
		1027	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
624	}	1028	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	1029	}
629	else	1030	else
		1031	#endif
630	{	1032	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1033	rt_now = ev_time ();
		1034
		1035	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
632	{	1036	{
633	periodics_reschedule (ev_now - now);	1037	periodics_reschedule (EV_A);
634		1038
635	/* adjust timers. this is easy, as the offset is the same for all */	1039	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	1040	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	1041	((WT)timers [i])->at += rt_now - mn_now;
638	}	1042	}
639		1043
640	now = ev_now;	1044	mn_now = rt_now;
641	}	1045	}
642	}	1046	}
643		1047
644	int ev_loop_done;	1048	void
		1049	ev_ref (EV_P)
		1050	{
		1051	++activecnt;
		1052	}
645		1053
		1054	void
		1055	ev_unref (EV_P)
		1056	{
		1057	--activecnt;
		1058	}
		1059
		1060	static int loop_done;
		1061
		1062	void
646	void ev_loop (int flags)	1063	ev_loop (EV_P_ int flags)
647	{	1064	{
648	double block;	1065	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1066	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650		1067
651	do	1068	do
652	{	1069	{
653	/* queue check watchers (and execute them) */	1070	/* queue check watchers (and execute them) */
654	if (preparecnt)	1071	if (expect_false (preparecnt))
655	{	1072	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1073	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	1074	call_pending (EV_A);
658	}	1075	}
659		1076
		1077	/* we might have forked, so reify kernel state if necessary */
		1078	if (expect_false (postfork))
		1079	loop_fork (EV_A);
		1080
660	/* update fd-related kernel structures */	1081	/* update fd-related kernel structures */
661	fd_reify ();	1082	fd_reify (EV_A);
662		1083
663	/* calculate blocking time */	1084	/* calculate blocking time */
664		1085
665	/* we only need this for !monotonic clockor timers, but as we basically	1086	/* we only need this for !monotonic clockor timers, but as we basically
666	always have timers, we just calculate it always */	1087	always have timers, we just calculate it always */
		1088	#if EV_USE_MONOTONIC
		1089	if (expect_true (have_monotonic))
		1090	time_update_monotonic (EV_A);
		1091	else
		1092	#endif
		1093	{
667	ev_now = ev_time ();	1094	rt_now = ev_time ();
		1095	mn_now = rt_now;
		1096	}
668		1097
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	1098	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	1099	block = 0.;
671	else	1100	else
672	{	1101	{
673	block = MAX_BLOCKTIME;	1102	block = MAX_BLOCKTIME;
674		1103
675	if (timercnt)	1104	if (timercnt)
676	{	1105	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1106	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
678	if (block > to) block = to;	1107	if (block > to) block = to;
679	}	1108	}
680		1109
681	if (periodiccnt)	1110	if (periodiccnt)
682	{	1111	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1112	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
684	if (block > to) block = to;	1113	if (block > to) block = to;
685	}	1114	}
686		1115
687	if (block < 0.) block = 0.;	1116	if (block < 0.) block = 0.;
688	}	1117	}
689		1118
690	method_poll (block);	1119	method_poll (EV_A_ block);
691		1120
692	/* update ev_now, do magic */	1121	/* update rt_now, do magic */
693	time_update ();	1122	time_update (EV_A);
694		1123
695	/* queue pending timers and reschedule them */	1124	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1125	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	1126	periodics_reify (EV_A); /* absolute timers called first */
698		1127
699	/* queue idle watchers unless io or timers are pending */	1128	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1129	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1130	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1131
703	/* queue check watchers, to be executed first */	1132	/* queue check watchers, to be executed first */
704	if (checkcnt)	1133	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1134	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1135
707	call_pending ();	1136	call_pending (EV_A);
708	}	1137	}
709	while (!ev_loop_done);	1138	while (activecnt && !loop_done);
710		1139
711	if (ev_loop_done != 2)	1140	if (loop_done != 2)
712	ev_loop_done = 0;	1141	loop_done = 0;
		1142	}
		1143
		1144	void
		1145	ev_unloop (EV_P_ int how)
		1146	{
		1147	loop_done = how;
713	}	1148	}
714		1149
715	/*****************************************************************************/	1150	/*****************************************************************************/
716		1151
717	static void	1152	inline void
718	wlist_add (WL *head, WL elem)	1153	wlist_add (WL *head, WL elem)
719	{	1154	{
720	elem->next = *head;	1155	elem->next = *head;
721	*head = elem;	1156	*head = elem;
722	}	1157	}
723		1158
724	static void	1159	inline void
725	wlist_del (WL *head, WL elem)	1160	wlist_del (WL *head, WL elem)
726	{	1161	{
727	while (*head)	1162	while (*head)
728	{	1163	{
729	if (*head == elem)	1164	if (*head == elem)
…		…
734		1169
735	head = &(*head)->next;	1170	head = &(*head)->next;
736	}	1171	}
737	}	1172	}
738		1173
739	static void	1174	inline void
740	ev_clear_pending (W w)	1175	ev_clear_pending (EV_P_ W w)
741	{	1176	{
742	if (w->pending)	1177	if (w->pending)
743	{	1178	{
744	pendings [w->pending - 1].w = 0;	1179	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1180	w->pending = 0;
746	}	1181	}
747	}	1182	}
748		1183
749	static void	1184	inline void
750	ev_start (W w, int active)	1185	ev_start (EV_P_ W w, int active)
751	{	1186	{
		1187	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1188	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1189
752	w->active = active;	1190	w->active = active;
		1191	ev_ref (EV_A);
753	}	1192	}
754		1193
755	static void	1194	inline void
756	ev_stop (W w)	1195	ev_stop (EV_P_ W w)
757	{	1196	{
		1197	ev_unref (EV_A);
758	w->active = 0;	1198	w->active = 0;
759	}	1199	}
760		1200
761	/*****************************************************************************/	1201	/*****************************************************************************/
762		1202
763	void	1203	void
764	ev_io_start (struct ev_io *w)	1204	ev_io_start (EV_P_ struct ev_io *w)
765	{	1205	{
		1206	int fd = w->fd;
		1207
766	if (ev_is_active (w))	1208	if (ev_is_active (w))
767	return;	1209	return;
768		1210
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1211	assert (("ev_io_start called with negative fd", fd >= 0));
772		1212
773	ev_start ((W)w, 1);	1213	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1214	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1215	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1216
777	fd_change (fd);	1217	fd_change (EV_A_ fd);
778	}	1218	}
779		1219
780	void	1220	void
781	ev_io_stop (struct ev_io *w)	1221	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1222	{
783	ev_clear_pending ((W)w);	1223	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1224	if (!ev_is_active (w))
785	return;	1225	return;
786		1226
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1227	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1228	ev_stop (EV_A_ (W)w);
789		1229
790	fd_change (w->fd);	1230	fd_change (EV_A_ w->fd);
791	}	1231	}
792		1232
793	void	1233	void
794	ev_timer_start (struct ev_timer *w)	1234	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1235	{
796	if (ev_is_active (w))	1236	if (ev_is_active (w))
797	return;	1237	return;
798		1238
799	w->at += now;	1239	((WT)w)->at += mn_now;
800		1240
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1241	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1242
803	ev_start ((W)w, ++timercnt);	1243	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1244	array_needsize (timers, timermax, timercnt, (void));
805	timers [timercnt - 1] = w;	1245	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1246	upheap ((WT *)timers, timercnt - 1);
807	}
808		1247
		1248	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1249	}
		1250
809	void	1251	void
810	ev_timer_stop (struct ev_timer *w)	1252	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1253	{
812	ev_clear_pending ((W)w);	1254	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1255	if (!ev_is_active (w))
814	return;	1256	return;
815		1257
		1258	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1259
816	if (w->active < timercnt--)	1260	if (((W)w)->active < timercnt--)
817	{	1261	{
818	timers [w->active - 1] = timers [timercnt];	1262	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1263	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1264	}
821		1265
822	w->at = w->repeat;	1266	((WT)w)->at = w->repeat;
823		1267
824	ev_stop ((W)w);	1268	ev_stop (EV_A_ (W)w);
825	}	1269	}
826		1270
827	void	1271	void
828	ev_timer_again (struct ev_timer *w)	1272	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1273	{
830	if (ev_is_active (w))	1274	if (ev_is_active (w))
831	{	1275	{
832	if (w->repeat)	1276	if (w->repeat)
833	{	1277	{
834	w->at = now + w->repeat;	1278	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1279	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
836	}	1280	}
837	else	1281	else
838	ev_timer_stop (w);	1282	ev_timer_stop (EV_A_ w);
839	}	1283	}
840	else if (w->repeat)	1284	else if (w->repeat)
841	ev_timer_start (w);	1285	ev_timer_start (EV_A_ w);
842	}	1286	}
843		1287
844	void	1288	void
845	ev_periodic_start (struct ev_periodic *w)	1289	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1290	{
847	if (ev_is_active (w))	1291	if (ev_is_active (w))
848	return;	1292	return;
849		1293
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1294	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1295
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1296	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)	1297	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1298	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
855		1299
856	ev_start ((W)w, ++periodiccnt);	1300	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1301	array_needsize (periodics, periodicmax, periodiccnt, (void));
858	periodics [periodiccnt - 1] = w;	1302	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1303	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1304
		1305	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1306	}
		1307
862	void	1308	void
863	ev_periodic_stop (struct ev_periodic *w)	1309	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1310	{
865	ev_clear_pending ((W)w);	1311	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1312	if (!ev_is_active (w))
867	return;	1313	return;
868		1314
		1315	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1316
869	if (w->active < periodiccnt--)	1317	if (((W)w)->active < periodiccnt--)
870	{	1318	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1319	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1320	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1321	}
874		1322
875	ev_stop ((W)w);	1323	ev_stop (EV_A_ (W)w);
876	}	1324	}
877		1325
878	void	1326	void
879	ev_signal_start (struct ev_signal *w)	1327	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1328	{
881	if (ev_is_active (w))	1329	if (ev_is_active (w))
882	return;	1330	return;
883		1331
		1332	ev_start (EV_A_ (W)w, ++idlecnt);
		1333	array_needsize (idles, idlemax, idlecnt, (void));
		1334	idles [idlecnt - 1] = w;
		1335	}
		1336
		1337	void
		1338	ev_idle_stop (EV_P_ struct ev_idle *w)
		1339	{
		1340	ev_clear_pending (EV_A_ (W)w);
		1341	if (ev_is_active (w))
		1342	return;
		1343
		1344	idles [((W)w)->active - 1] = idles [--idlecnt];
		1345	ev_stop (EV_A_ (W)w);
		1346	}
		1347
		1348	void
		1349	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1350	{
		1351	if (ev_is_active (w))
		1352	return;
		1353
		1354	ev_start (EV_A_ (W)w, ++preparecnt);
		1355	array_needsize (prepares, preparemax, preparecnt, (void));
		1356	prepares [preparecnt - 1] = w;
		1357	}
		1358
		1359	void
		1360	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1361	{
		1362	ev_clear_pending (EV_A_ (W)w);
		1363	if (ev_is_active (w))
		1364	return;
		1365
		1366	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1367	ev_stop (EV_A_ (W)w);
		1368	}
		1369
		1370	void
		1371	ev_check_start (EV_P_ struct ev_check *w)
		1372	{
		1373	if (ev_is_active (w))
		1374	return;
		1375
		1376	ev_start (EV_A_ (W)w, ++checkcnt);
		1377	array_needsize (checks, checkmax, checkcnt, (void));
		1378	checks [checkcnt - 1] = w;
		1379	}
		1380
		1381	void
		1382	ev_check_stop (EV_P_ struct ev_check *w)
		1383	{
		1384	ev_clear_pending (EV_A_ (W)w);
		1385	if (ev_is_active (w))
		1386	return;
		1387
		1388	checks [((W)w)->active - 1] = checks [--checkcnt];
		1389	ev_stop (EV_A_ (W)w);
		1390	}
		1391
		1392	#ifndef SA_RESTART
		1393	# define SA_RESTART 0
		1394	#endif
		1395
		1396	void
		1397	ev_signal_start (EV_P_ struct ev_signal *w)
		1398	{
		1399	#if EV_MULTIPLICITY
		1400	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1401	#endif
		1402	if (ev_is_active (w))
		1403	return;
		1404
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1405	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1406
886	ev_start ((W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1408	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1409	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1410
890	if (!w->next)	1411	if (!((WL)w)->next)
891	{	1412	{
		1413	#if WIN32
		1414	signal (w->signum, sighandler);
		1415	#else
892	struct sigaction sa;	1416	struct sigaction sa;
893	sa.sa_handler = sighandler;	1417	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1418	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1419	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1420	sigaction (w->signum, &sa, 0);
		1421	#endif
897	}	1422	}
898	}	1423	}
899		1424
900	void	1425	void
901	ev_signal_stop (struct ev_signal *w)	1426	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1427	{
903	ev_clear_pending ((W)w);	1428	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1429	if (!ev_is_active (w))
905	return;	1430	return;
906		1431
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1432	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1433	ev_stop (EV_A_ (W)w);
909		1434
910	if (!signals [w->signum - 1].head)	1435	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1436	signal (w->signum, SIG_DFL);
912	}	1437	}
913		1438
914	void	1439	void
915	ev_idle_start (struct ev_idle *w)	1440	ev_child_start (EV_P_ struct ev_child *w)
916	{	1441	{
		1442	#if EV_MULTIPLICITY
		1443	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1444	#endif
917	if (ev_is_active (w))	1445	if (ev_is_active (w))
918	return;	1446	return;
919		1447
920	ev_start ((W)w, ++idlecnt);	1448	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1449	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1450	}
924		1451
925	void	1452	void
926	ev_idle_stop (struct ev_idle *w)	1453	ev_child_stop (EV_P_ struct ev_child *w)
927	{	1454	{
928	ev_clear_pending ((W)w);	1455	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1456	if (ev_is_active (w))
930	return;	1457	return;
931		1458
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);	1459	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1460	ev_stop (EV_A_ (W)w);
999	}	1461	}
1000		1462
1001	/*****************************************************************************/	1463	/*****************************************************************************/
1002		1464
1003	struct ev_once	1465	struct ev_once
…		…
1007	void (*cb)(int revents, void *arg);	1469	void (*cb)(int revents, void *arg);
1008	void *arg;	1470	void *arg;
1009	};	1471	};
1010		1472
1011	static void	1473	static void
1012	once_cb (struct ev_once *once, int revents)	1474	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1475	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1476	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1477	void *arg = once->arg;
1016		1478
1017	ev_io_stop (&once->io);	1479	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1480	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1481	ev_free (once);
1020		1482
1021	cb (revents, arg);	1483	cb (revents, arg);
1022	}	1484	}
1023		1485
1024	static void	1486	static void
1025	once_cb_io (struct ev_io *w, int revents)	1487	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1488	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1489	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	1490	}
1029		1491
1030	static void	1492	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1493	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1494	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1495	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	1496	}
1035		1497
1036	void	1498	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1499	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	1500	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1501	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1040		1502
1041	if (!once)	1503	if (!once)
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1504	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1043	else	1505	else
1044	{	1506	{
…		…
1047		1509
1048	ev_watcher_init (&once->io, once_cb_io);	1510	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1511	if (fd >= 0)
1050	{	1512	{
1051	ev_io_set (&once->io, fd, events);	1513	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1514	ev_io_start (EV_A_ &once->io);
1053	}	1515	}
1054		1516
1055	ev_watcher_init (&once->to, once_cb_to);	1517	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1518	if (timeout >= 0.)
1057	{	1519	{
1058	ev_timer_set (&once->to, timeout, 0.);	1520	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1521	ev_timer_start (EV_A_ &once->to);
1060	}	1522	}
1061	}	1523	}
1062	}	1524	}
1063		1525
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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