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Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	59	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	60	#include <stddef.h>
36		61
37	#include <stdio.h>	62	#include <stdio.h>
38		63
39	#include <assert.h>	64	#include <assert.h>
40	#include <errno.h>	65	#include <errno.h>
41	#include <sys/types.h>	66	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	67	#include <time.h>
45		68
		69	#ifndef PERL
		70	# include <signal.h>
		71	#endif
		72
		73	#ifndef WIN32
		74	# include <unistd.h>
		75	# include <sys/time.h>
		76	# include <sys/wait.h>
		77	#endif
		78	/**/
		79
46	#ifndef HAVE_MONOTONIC	80	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	81	# define EV_USE_MONOTONIC 1
		82	#endif
		83
		84	#ifndef EV_USE_SELECT
		85	# define EV_USE_SELECT 1
		86	#endif
		87
		88	#ifndef EV_USE_POLL
		89	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		90	#endif
		91
		92	#ifndef EV_USE_EPOLL
		93	# define EV_USE_EPOLL 0
		94	#endif
		95
		96	#ifndef EV_USE_KQUEUE
		97	# define EV_USE_KQUEUE 0
		98	#endif
		99
		100	#ifndef EV_USE_WIN32
		101	# ifdef WIN32
		102	# define EV_USE_WIN32 0 /* it does not exist, use select */
		103	# undef EV_USE_SELECT
		104	# define EV_USE_SELECT 1
		105	# else
		106	# define EV_USE_WIN32 0
49	# endif	107	# endif
50	#endif	108	#endif
51		109
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	110	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	111	# define EV_USE_REALTIME 1
62	#endif	112	#endif
		113
		114	/**/
		115
		116	#ifndef CLOCK_MONOTONIC
		117	# undef EV_USE_MONOTONIC
		118	# define EV_USE_MONOTONIC 0
		119	#endif
		120
		121	#ifndef CLOCK_REALTIME
		122	# undef EV_USE_REALTIME
		123	# define EV_USE_REALTIME 0
		124	#endif
		125
		126	/**/
63		127
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	128	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	129	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	130	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		131	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		132
68	#include "ev.h"	133	#include "ev.h"
		134
		135	#if __GNUC__ >= 3
		136	# define expect(expr,value) __builtin_expect ((expr),(value))
		137	# define inline inline
		138	#else
		139	# define expect(expr,value) (expr)
		140	# define inline static
		141	#endif
		142
		143	#define expect_false(expr) expect ((expr) != 0, 0)
		144	#define expect_true(expr) expect ((expr) != 0, 1)
		145
		146	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		147	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		148
70	typedef struct ev_watcher *W;	149	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	150	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	151	typedef struct ev_watcher_time *WT;
73		152
74	static ev_tstamp now, diff; /* monotonic clock */	153	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77		154
78	static int have_monotonic; /* runtime */	155	#if WIN32
79		156	/* note: the comment below could not be substantiated, but what would I care */
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	157	/* MSDN says this is required to handle SIGFPE */
81	static void (*method_modify)(int fd, int oev, int nev);	158	volatile double SIGFPE_REQ = 0.0f;
82	static void (*method_poll)(ev_tstamp timeout);	159	#endif
83		160
84	/*****************************************************************************/	161	/*****************************************************************************/
85		162
86	ev_tstamp	163	static void (*syserr_cb)(const char *msg);
		164
		165	void ev_set_syserr_cb (void (*cb)(const char *msg))
		166	{
		167	syserr_cb = cb;
		168	}
		169
		170	static void
		171	syserr (const char *msg)
		172	{
		173	if (!msg)
		174	msg = "(libev) system error";
		175
		176	if (syserr_cb)
		177	syserr_cb (msg);
		178	else
		179	{
		180	perror (msg);
		181	abort ();
		182	}
		183	}
		184
		185	static void *(*alloc)(void *ptr, long size);
		186
		187	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		188	{
		189	alloc = cb;
		190	}
		191
		192	static void *
		193	ev_realloc (void *ptr, long size)
		194	{
		195	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		196
		197	if (!ptr && size)
		198	{
		199	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		200	abort ();
		201	}
		202
		203	return ptr;
		204	}
		205
		206	#define ev_malloc(size) ev_realloc (0, (size))
		207	#define ev_free(ptr) ev_realloc ((ptr), 0)
		208
		209	/*****************************************************************************/
		210
		211	typedef struct
		212	{
		213	WL head;
		214	unsigned char events;
		215	unsigned char reify;
		216	} ANFD;
		217
		218	typedef struct
		219	{
		220	W w;
		221	int events;
		222	} ANPENDING;
		223
		224	#if EV_MULTIPLICITY
		225
		226	struct ev_loop
		227	{
		228	# define VAR(name,decl) decl;
		229	# include "ev_vars.h"
		230	};
		231	# undef VAR
		232	# include "ev_wrap.h"
		233
		234	#else
		235
		236	# define VAR(name,decl) static decl;
		237	# include "ev_vars.h"
		238	# undef VAR
		239
		240	#endif
		241
		242	/*****************************************************************************/
		243
		244	inline ev_tstamp
87	ev_time (void)	245	ev_time (void)
88	{	246	{
89	#if HAVE_REALTIME	247	#if EV_USE_REALTIME
90	struct timespec ts;	248	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	249	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	250	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	251	#else
94	struct timeval tv;	252	struct timeval tv;
95	gettimeofday (&tv, 0);	253	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	254	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	255	#endif
98	}	256	}
99		257
100	static ev_tstamp	258	inline ev_tstamp
101	get_clock (void)	259	get_clock (void)
102	{	260	{
103	#if HAVE_MONOTONIC	261	#if EV_USE_MONOTONIC
104	if (have_monotonic)	262	if (expect_true (have_monotonic))
105	{	263	{
106	struct timespec ts;	264	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	265	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	266	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	267	}
110	#endif	268	#endif
111		269
112	return ev_time ();	270	return ev_time ();
113	}	271	}
114		272
		273	ev_tstamp
		274	ev_now (EV_P)
		275	{
		276	return rt_now;
		277	}
		278
		279	#define array_roundsize(base,n) ((n) | 4 & ~3)
		280
115	#define array_needsize(base,cur,cnt,init) \	281	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	282	if (expect_false ((cnt) > cur)) \
117	{ \	283	{ \
118	int newcnt = cur ? cur << 1 : 16; \	284	int newcnt = cur; \
		285	do \
		286	{ \
		287	newcnt = array_roundsize (base, newcnt << 1); \
		288	} \
		289	while ((cnt) > newcnt); \
		290	\
119	base = realloc (base, sizeof (*base) * (newcnt)); \	291	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
120	init (base + cur, newcnt - cur); \	292	init (base + cur, newcnt - cur); \
121	cur = newcnt; \	293	cur = newcnt; \
122	}	294	}
		295
		296	#define array_slim(stem) \
		297	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		298	{ \
		299	stem ## max = array_roundsize (stem ## cnt >> 1); \
		300	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \
		301	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		302	}
		303
		304	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		305	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		306	#define array_free_microshit(stem) \
		307	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		308
		309	#define array_free(stem, idx) \
		310	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
123		311
124	/*****************************************************************************/	312	/*****************************************************************************/
125		313
126	typedef struct
127	{
128	struct ev_io *head;
129	unsigned char wev, rev; /* want, received event set */
130	} ANFD;
131
132	static ANFD *anfds;
133	static int anfdmax;
134
135	static int *fdchanges;
136	static int fdchangemax, fdchangecnt;
137
138	static void	314	static void
139	anfds_init (ANFD *base, int count)	315	anfds_init (ANFD *base, int count)
140	{	316	{
141	while (count--)	317	while (count--)
142	{	318	{
143	base->head = 0;	319	base->head = 0;
144	base->wev = base->rev = EV_NONE;	320	base->events = EV_NONE;
		321	base->reify = 0;
		322
145	++base;	323	++base;
146	}	324	}
147	}	325	}
148		326
149	typedef struct
150	{
151	W w;
152	int events;
153	} ANPENDING;
154
155	static ANPENDING *pendings;
156	static int pendingmax, pendingcnt;
157
158	static void	327	static void
159	event (W w, int events)	328	event (EV_P_ W w, int events)
160	{	329	{
161	if (w->active)	330	if (w->pending)
162	{	331	{
163	w->pending = ++pendingcnt;
164	array_needsize (pendings, pendingmax, pendingcnt, );
165	pendings [pendingcnt - 1].w = w;
166	pendings [pendingcnt - 1].events = events;	332	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		333	return;
167	}	334	}
168	}
169		335
		336	w->pending = ++pendingcnt [ABSPRI (w)];
		337	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
		338	pendings [ABSPRI (w)][w->pending - 1].w = w;
		339	pendings [ABSPRI (w)][w->pending - 1].events = events;
		340	}
		341
170	static void	342	static void
		343	queue_events (EV_P_ W *events, int eventcnt, int type)
		344	{
		345	int i;
		346
		347	for (i = 0; i < eventcnt; ++i)
		348	event (EV_A_ events [i], type);
		349	}
		350
		351	static void
171	fd_event (int fd, int events)	352	fd_event (EV_P_ int fd, int events)
172	{	353	{
173	ANFD *anfd = anfds + fd;	354	ANFD *anfd = anfds + fd;
174	struct ev_io *w;	355	struct ev_io *w;
175		356
176	for (w = anfd->head; w; w = w->next)	357	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
177	{	358	{
178	int ev = w->events & events;	359	int ev = w->events & events;
179		360
180	if (ev)	361	if (ev)
181	event ((W)w, ev);	362	event (EV_A_ (W)w, ev);
182	}	363	}
183	}	364	}
184		365
		366	/*****************************************************************************/
		367
185	static void	368	static void
186	queue_events (W *events, int eventcnt, int type)	369	fd_reify (EV_P)
187	{	370	{
188	int i;	371	int i;
189		372
190	for (i = 0; i < eventcnt; ++i)	373	for (i = 0; i < fdchangecnt; ++i)
191	event (events [i], type);	374	{
		375	int fd = fdchanges [i];
		376	ANFD *anfd = anfds + fd;
		377	struct ev_io *w;
		378
		379	int events = 0;
		380
		381	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		382	events |= w->events;
		383
		384	anfd->reify = 0;
		385
		386	method_modify (EV_A_ fd, anfd->events, events);
		387	anfd->events = events;
		388	}
		389
		390	fdchangecnt = 0;
		391	}
		392
		393	static void
		394	fd_change (EV_P_ int fd)
		395	{
		396	if (anfds [fd].reify)
		397	return;
		398
		399	anfds [fd].reify = 1;
		400
		401	++fdchangecnt;
		402	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
		403	fdchanges [fdchangecnt - 1] = fd;
		404	}
		405
		406	static void
		407	fd_kill (EV_P_ int fd)
		408	{
		409	struct ev_io *w;
		410
		411	while ((w = (struct ev_io *)anfds [fd].head))
		412	{
		413	ev_io_stop (EV_A_ w);
		414	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		415	}
		416	}
		417
		418	static int
		419	fd_valid (int fd)
		420	{
		421	#ifdef WIN32
		422	return !!win32_get_osfhandle (fd);
		423	#else
		424	return fcntl (fd, F_GETFD) != -1;
		425	#endif
192	}	426	}
193		427
194	/* called on EBADF to verify fds */	428	/* called on EBADF to verify fds */
195	static void	429	static void
196	fd_recheck ()	430	fd_ebadf (EV_P)
197	{	431	{
198	int fd;	432	int fd;
199		433
200	for (fd = 0; fd < anfdmax; ++fd)	434	for (fd = 0; fd < anfdmax; ++fd)
201	if (anfds [fd].wev)	435	if (anfds [fd].events)
202	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	436	if (!fd_valid (fd) == -1 && errno == EBADF)
203	while (anfds [fd].head)	437	fd_kill (EV_A_ fd);
204	evio_stop (anfds [fd].head);	438	}
		439
		440	/* called on ENOMEM in select/poll to kill some fds and retry */
		441	static void
		442	fd_enomem (EV_P)
		443	{
		444	int fd;
		445
		446	for (fd = anfdmax; fd--; )
		447	if (anfds [fd].events)
		448	{
		449	fd_kill (EV_A_ fd);
		450	return;
		451	}
		452	}
		453
		454	/* usually called after fork if method needs to re-arm all fds from scratch */
		455	static void
		456	fd_rearm_all (EV_P)
		457	{
		458	int fd;
		459
		460	/* this should be highly optimised to not do anything but set a flag */
		461	for (fd = 0; fd < anfdmax; ++fd)
		462	if (anfds [fd].events)
		463	{
		464	anfds [fd].events = 0;
		465	fd_change (EV_A_ fd);
		466	}
205	}	467	}
206		468
207	/*****************************************************************************/	469	/*****************************************************************************/
208		470
209	static struct ev_timer **timers;
210	static int timermax, timercnt;
211
212	static struct ev_periodic **periodics;
213	static int periodicmax, periodiccnt;
214
215	static void	471	static void
216	upheap (WT *timers, int k)	472	upheap (WT *heap, int k)
217	{	473	{
218	WT w = timers [k];	474	WT w = heap [k];
219		475
220	while (k && timers [k >> 1]->at > w->at)	476	while (k && heap [k >> 1]->at > w->at)
221	{	477	{
222	timers [k] = timers [k >> 1];	478	heap [k] = heap [k >> 1];
223	timers [k]->active = k + 1;	479	((W)heap [k])->active = k + 1;
224	k >>= 1;	480	k >>= 1;
225	}	481	}
226		482
227	timers [k] = w;	483	heap [k] = w;
228	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
229		485
230	}	486	}
231		487
232	static void	488	static void
233	downheap (WT *timers, int N, int k)	489	downheap (WT *heap, int N, int k)
234	{	490	{
235	WT w = timers [k];	491	WT w = heap [k];
236		492
237	while (k < (N >> 1))	493	while (k < (N >> 1))
238	{	494	{
239	int j = k << 1;	495	int j = k << 1;
240		496
241	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	497	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
242	++j;	498	++j;
243		499
244	if (w->at <= timers [j]->at)	500	if (w->at <= heap [j]->at)
245	break;	501	break;
246		502
247	timers [k] = timers [j];	503	heap [k] = heap [j];
248	timers [k]->active = k + 1;	504	((W)heap [k])->active = k + 1;
249	k = j;	505	k = j;
250	}	506	}
251		507
252	timers [k] = w;	508	heap [k] = w;
253	timers [k]->active = k + 1;	509	((W)heap [k])->active = k + 1;
254	}	510	}
255		511
256	/*****************************************************************************/	512	/*****************************************************************************/
257		513
258	typedef struct	514	typedef struct
259	{	515	{
260	struct ev_signal *head;	516	WL head;
261	sig_atomic_t gotsig;	517	sig_atomic_t volatile gotsig;
262	} ANSIG;	518	} ANSIG;
263		519
264	static ANSIG *signals;	520	static ANSIG *signals;
265	static int signalmax;	521	static int signalmax;
266		522
267	static int sigpipe [2];	523	static int sigpipe [2];
268	static sig_atomic_t gotsig;	524	static sig_atomic_t volatile gotsig;
269	static struct ev_io sigev;	525	static struct ev_io sigev;
270		526
271	static void	527	static void
272	signals_init (ANSIG *base, int count)	528	signals_init (ANSIG *base, int count)
273	{	529	{
274	while (count--)	530	while (count--)
275	{	531	{
276	base->head = 0;	532	base->head = 0;
277	base->gotsig = 0;	533	base->gotsig = 0;
		534
278	++base;	535	++base;
279	}	536	}
280	}	537	}
281		538
282	static void	539	static void
283	sighandler (int signum)	540	sighandler (int signum)
284	{	541	{
		542	#if WIN32
		543	signal (signum, sighandler);
		544	#endif
		545
285	signals [signum - 1].gotsig = 1;	546	signals [signum - 1].gotsig = 1;
286		547
287	if (!gotsig)	548	if (!gotsig)
288	{	549	{
		550	int old_errno = errno;
289	gotsig = 1;	551	gotsig = 1;
290	write (sigpipe [1], &gotsig, 1);	552	write (sigpipe [1], &signum, 1);
		553	errno = old_errno;
291	}	554	}
292	}	555	}
293		556
294	static void	557	static void
295	sigcb (struct ev_io *iow, int revents)	558	sigcb (EV_P_ struct ev_io *iow, int revents)
296	{	559	{
297	struct ev_signal *w;	560	WL w;
298	int sig;	561	int signum;
299		562
		563	read (sigpipe [0], &revents, 1);
300	gotsig = 0;	564	gotsig = 0;
301	read (sigpipe [0], &revents, 1);
302		565
303	for (sig = signalmax; sig--; )	566	for (signum = signalmax; signum--; )
304	if (signals [sig].gotsig)	567	if (signals [signum].gotsig)
305	{	568	{
306	signals [sig].gotsig = 0;	569	signals [signum].gotsig = 0;
307		570
308	for (w = signals [sig].head; w; w = w->next)	571	for (w = signals [signum].head; w; w = w->next)
309	event ((W)w, EV_SIGNAL);	572	event (EV_A_ (W)w, EV_SIGNAL);
310	}	573	}
311	}	574	}
312		575
313	static void	576	static void
314	siginit (void)	577	siginit (EV_P)
315	{	578	{
		579	#ifndef WIN32
316	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	580	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	581	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318		582
319	/* rather than sort out wether we really need nb, set it */	583	/* rather than sort out wether we really need nb, set it */
320	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	584	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	585	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		586	#endif
322		587
323	evio_set (&sigev, sigpipe [0], EV_READ);	588	ev_io_set (&sigev, sigpipe [0], EV_READ);
324	evio_start (&sigev);	589	ev_io_start (EV_A_ &sigev);
		590	ev_unref (EV_A); /* child watcher should not keep loop alive */
325	}	591	}
326		592
327	/*****************************************************************************/	593	/*****************************************************************************/
328		594
329	static struct ev_idle **idles;
330	static int idlemax, idlecnt;
331
332	static struct ev_prepare **prepares;
333	static int preparemax, preparecnt;
334
335	static struct ev_check **checks;
336	static int checkmax, checkcnt;
337
338	/*****************************************************************************/
339
340	static struct ev_child *childs [PID_HASHSIZE];	595	static struct ev_child *childs [PID_HASHSIZE];
		596
		597	#ifndef WIN32
		598
341	static struct ev_signal childev;	599	static struct ev_signal childev;
342		600
343	#ifndef WCONTINUED	601	#ifndef WCONTINUED
344	# define WCONTINUED 0	602	# define WCONTINUED 0
345	#endif	603	#endif
346		604
347	static void	605	static void
348	childcb (struct ev_signal *sw, int revents)	606	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
349	{	607	{
350	struct ev_child *w;	608	struct ev_child *w;
		609
		610	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		611	if (w->pid == pid || !w->pid)
		612	{
		613	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		614	w->rpid = pid;
		615	w->rstatus = status;
		616	event (EV_A_ (W)w, EV_CHILD);
		617	}
		618	}
		619
		620	static void
		621	childcb (EV_P_ struct ev_signal *sw, int revents)
		622	{
351	int pid, status;	623	int pid, status;
352		624
353	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	625	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
354	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	626	{
355	if (w->pid == pid || w->pid == -1)	627	/* make sure we are called again until all childs have been reaped */
		628	event (EV_A_ (W)sw, EV_SIGNAL);
		629
		630	child_reap (EV_A_ sw, pid, pid, status);
		631	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		632	}
		633	}
		634
		635	#endif
		636
		637	/*****************************************************************************/
		638
		639	#if EV_USE_KQUEUE
		640	# include "ev_kqueue.c"
		641	#endif
		642	#if EV_USE_EPOLL
		643	# include "ev_epoll.c"
		644	#endif
		645	#if EV_USE_POLL
		646	# include "ev_poll.c"
		647	#endif
		648	#if EV_USE_SELECT
		649	# include "ev_select.c"
		650	#endif
		651
		652	int
		653	ev_version_major (void)
		654	{
		655	return EV_VERSION_MAJOR;
		656	}
		657
		658	int
		659	ev_version_minor (void)
		660	{
		661	return EV_VERSION_MINOR;
		662	}
		663
		664	/* return true if we are running with elevated privileges and should ignore env variables */
		665	static int
		666	enable_secure (void)
		667	{
		668	#ifdef WIN32
		669	return 0;
		670	#else
		671	return getuid () != geteuid ()
		672	|| getgid () != getegid ();
		673	#endif
		674	}
		675
		676	int
		677	ev_method (EV_P)
		678	{
		679	return method;
		680	}
		681
		682	static void
		683	loop_init (EV_P_ int methods)
		684	{
		685	if (!method)
		686	{
		687	#if EV_USE_MONOTONIC
		688	{
		689	struct timespec ts;
		690	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		691	have_monotonic = 1;
		692	}
		693	#endif
		694
		695	rt_now = ev_time ();
		696	mn_now = get_clock ();
		697	now_floor = mn_now;
		698	rtmn_diff = rt_now - mn_now;
		699
		700	if (methods == EVMETHOD_AUTO)
		701	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		702	methods = atoi (getenv ("LIBEV_METHODS"));
		703	else
		704	methods = EVMETHOD_ANY;
		705
		706	method = 0;
		707	#if EV_USE_WIN32
		708	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		709	#endif
		710	#if EV_USE_KQUEUE
		711	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		712	#endif
		713	#if EV_USE_EPOLL
		714	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		715	#endif
		716	#if EV_USE_POLL
		717	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		718	#endif
		719	#if EV_USE_SELECT
		720	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		721	#endif
		722
		723	ev_watcher_init (&sigev, sigcb);
		724	ev_set_priority (&sigev, EV_MAXPRI);
		725	}
		726	}
		727
		728	void
		729	loop_destroy (EV_P)
		730	{
		731	int i;
		732
		733	#if EV_USE_WIN32
		734	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		735	#endif
		736	#if EV_USE_KQUEUE
		737	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		738	#endif
		739	#if EV_USE_EPOLL
		740	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		741	#endif
		742	#if EV_USE_POLL
		743	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		744	#endif
		745	#if EV_USE_SELECT
		746	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		747	#endif
		748
		749	for (i = NUMPRI; i--; )
		750	array_free (pending, [i]);
		751
		752	/* have to use the microsoft-never-gets-it-right macro */
		753	array_free_microshit (fdchange);
		754	array_free_microshit (timer);
		755	array_free_microshit (periodic);
		756	array_free_microshit (idle);
		757	array_free_microshit (prepare);
		758	array_free_microshit (check);
		759
		760	method = 0;
		761	}
		762
		763	static void
		764	loop_fork (EV_P)
		765	{
		766	#if EV_USE_EPOLL
		767	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		768	#endif
		769	#if EV_USE_KQUEUE
		770	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		771	#endif
		772
		773	if (ev_is_active (&sigev))
		774	{
		775	/* default loop */
		776
		777	ev_ref (EV_A);
		778	ev_io_stop (EV_A_ &sigev);
		779	close (sigpipe [0]);
		780	close (sigpipe [1]);
		781
		782	while (pipe (sigpipe))
		783	syserr ("(libev) error creating pipe");
		784
		785	siginit (EV_A);
		786	}
		787
		788	postfork = 0;
		789	}
		790
		791	#if EV_MULTIPLICITY
		792	struct ev_loop *
		793	ev_loop_new (int methods)
		794	{
		795	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		796
		797	memset (loop, 0, sizeof (struct ev_loop));
		798
		799	loop_init (EV_A_ methods);
		800
		801	if (ev_method (EV_A))
		802	return loop;
		803
		804	return 0;
		805	}
		806
		807	void
		808	ev_loop_destroy (EV_P)
		809	{
		810	loop_destroy (EV_A);
		811	ev_free (loop);
		812	}
		813
		814	void
		815	ev_loop_fork (EV_P)
		816	{
		817	postfork = 1;
		818	}
		819
		820	#endif
		821
		822	#if EV_MULTIPLICITY
		823	struct ev_loop default_loop_struct;
		824	static struct ev_loop *default_loop;
		825
		826	struct ev_loop *
		827	#else
		828	static int default_loop;
		829
		830	int
		831	#endif
		832	ev_default_loop (int methods)
		833	{
		834	if (sigpipe [0] == sigpipe [1])
		835	if (pipe (sigpipe))
		836	return 0;
		837
		838	if (!default_loop)
		839	{
		840	#if EV_MULTIPLICITY
		841	struct ev_loop *loop = default_loop = &default_loop_struct;
		842	#else
		843	default_loop = 1;
		844	#endif
		845
		846	loop_init (EV_A_ methods);
		847
		848	if (ev_method (EV_A))
356	{	849	{
357	w->status = status;	850	siginit (EV_A);
358	event ((W)w, EV_CHILD);	851
		852	#ifndef WIN32
		853	ev_signal_init (&childev, childcb, SIGCHLD);
		854	ev_set_priority (&childev, EV_MAXPRI);
		855	ev_signal_start (EV_A_ &childev);
		856	ev_unref (EV_A); /* child watcher should not keep loop alive */
		857	#endif
359	}	858	}
		859	else
		860	default_loop = 0;
		861	}
		862
		863	return default_loop;
		864	}
		865
		866	void
		867	ev_default_destroy (void)
		868	{
		869	#if EV_MULTIPLICITY
		870	struct ev_loop *loop = default_loop;
		871	#endif
		872
		873	#ifndef WIN32
		874	ev_ref (EV_A); /* child watcher */
		875	ev_signal_stop (EV_A_ &childev);
		876	#endif
		877
		878	ev_ref (EV_A); /* signal watcher */
		879	ev_io_stop (EV_A_ &sigev);
		880
		881	close (sigpipe [0]); sigpipe [0] = 0;
		882	close (sigpipe [1]); sigpipe [1] = 0;
		883
		884	loop_destroy (EV_A);
		885	}
		886
		887	void
		888	ev_default_fork (void)
		889	{
		890	#if EV_MULTIPLICITY
		891	struct ev_loop *loop = default_loop;
		892	#endif
		893
		894	if (method)
		895	postfork = 1;
360	}	896	}
361		897
362	/*****************************************************************************/	898	/*****************************************************************************/
363		899
364	#if HAVE_EPOLL
365	# include "ev_epoll.c"
366	#endif
367	#if HAVE_SELECT
368	# include "ev_select.c"
369	#endif
370
371	int ev_init (int flags)
372	{
373	#if HAVE_MONOTONIC
374	{
375	struct timespec ts;
376	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
377	have_monotonic = 1;
378	}
379	#endif
380
381	ev_now = ev_time ();
382	now = get_clock ();
383	diff = ev_now - now;
384
385	if (pipe (sigpipe))
386	return 0;
387
388	ev_method = EVMETHOD_NONE;
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391	#endif
392	#if HAVE_SELECT
393	if (ev_method == EVMETHOD_NONE) select_init (flags);
394	#endif
395
396	if (ev_method)
397	{
398	evw_init (&sigev, sigcb);
399	siginit ();
400
401	evsignal_init (&childev, childcb, SIGCHLD);
402	evsignal_start (&childev);
403	}
404
405	return ev_method;
406	}
407
408	/*****************************************************************************/
409
410	void ev_prefork (void)
411	{
412	/* nop */
413	}
414
415	void ev_postfork_parent (void)
416	{
417	/* nop */
418	}
419
420	void ev_postfork_child (void)
421	{
422	#if HAVE_EPOLL
423	if (ev_method == EVMETHOD_EPOLL)
424	epoll_postfork_child ();
425	#endif
426
427	evio_stop (&sigev);
428	close (sigpipe [0]);
429	close (sigpipe [1]);
430	pipe (sigpipe);
431	siginit ();
432	}
433
434	/*****************************************************************************/
435
436	static void	900	static void
437	fd_reify (void)	901	call_pending (EV_P)
438	{	902	{
439	int i;	903	int pri;
440		904
441	for (i = 0; i < fdchangecnt; ++i)	905	for (pri = NUMPRI; pri--; )
442	{	906	while (pendingcnt [pri])
443	int fd = fdchanges [i];
444	ANFD *anfd = anfds + fd;
445	struct ev_io *w;
446
447	int wev = 0;
448
449	for (w = anfd->head; w; w = w->next)
450	wev |= w->events;
451
452	if (anfd->wev != wev)
453	{	907	{
454	method_modify (fd, anfd->wev, wev);
455	anfd->wev = wev;
456	}
457	}
458
459	fdchangecnt = 0;
460	}
461
462	static void
463	call_pending ()
464	{
465	while (pendingcnt)
466	{
467	ANPENDING *p = pendings + --pendingcnt;	908	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
468		909
469	if (p->w)	910	if (p->w)
470	{	911	{
471	p->w->pending = 0;	912	p->w->pending = 0;
472	p->w->cb (p->w, p->events);	913	p->w->cb (EV_A_ p->w, p->events);
473	}	914	}
474	}	915	}
475	}	916	}
476		917
477	static void	918	static void
478	timers_reify ()	919	timers_reify (EV_P)
479	{	920	{
480	while (timercnt && timers [0]->at <= now)	921	while (timercnt && ((WT)timers [0])->at <= mn_now)
481	{	922	{
482	struct ev_timer *w = timers [0];	923	struct ev_timer *w = timers [0];
483		924
484	event ((W)w, EV_TIMEOUT);	925	assert (("inactive timer on timer heap detected", ev_is_active (w)));
485		926
486	/* first reschedule or stop timer */	927	/* first reschedule or stop timer */
487	if (w->repeat)	928	if (w->repeat)
488	{	929	{
		930	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
489	w->at = now + w->repeat;	931	((WT)w)->at = mn_now + w->repeat;
490	assert (("timer timeout in the past, negative repeat?", w->at > now));
491	downheap ((WT *)timers, timercnt, 0);	932	downheap ((WT *)timers, timercnt, 0);
492	}	933	}
493	else	934	else
494	evtimer_stop (w); /* nonrepeating: stop timer */	935	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495	}
496	}
497		936
		937	event (EV_A_ (W)w, EV_TIMEOUT);
		938	}
		939	}
		940
498	static void	941	static void
499	periodics_reify ()	942	periodics_reify (EV_P)
500	{	943	{
501	while (periodiccnt && periodics [0]->at <= ev_now)	944	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
502	{	945	{
503	struct ev_periodic *w = periodics [0];	946	struct ev_periodic *w = periodics [0];
		947
		948	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
504		949
505	/* first reschedule or stop timer */	950	/* first reschedule or stop timer */
506	if (w->interval)	951	if (w->interval)
507	{	952	{
508	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	953	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
509	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	954	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
510	downheap ((WT *)periodics, periodiccnt, 0);	955	downheap ((WT *)periodics, periodiccnt, 0);
511	}	956	}
512	else	957	else
513	evperiodic_stop (w); /* nonrepeating: stop timer */	958	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514		959
515	event ((W)w, EV_TIMEOUT);	960	event (EV_A_ (W)w, EV_PERIODIC);
516	}	961	}
517	}	962	}
518		963
519	static void	964	static void
520	periodics_reschedule (ev_tstamp diff)	965	periodics_reschedule (EV_P)
521	{	966	{
522	int i;	967	int i;
523		968
524	/* adjust periodics after time jump */	969	/* adjust periodics after time jump */
525	for (i = 0; i < periodiccnt; ++i)	970	for (i = 0; i < periodiccnt; ++i)
526	{	971	{
527	struct ev_periodic *w = periodics [i];	972	struct ev_periodic *w = periodics [i];
528		973
529	if (w->interval)	974	if (w->interval)
530	{	975	{
531	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	976	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
532		977
533	if (fabs (diff) >= 1e-4)	978	if (fabs (diff) >= 1e-4)
534	{	979	{
535	evperiodic_stop (w);	980	ev_periodic_stop (EV_A_ w);
536	evperiodic_start (w);	981	ev_periodic_start (EV_A_ w);
537		982
538	i = 0; /* restart loop, inefficient, but time jumps should be rare */	983	i = 0; /* restart loop, inefficient, but time jumps should be rare */
539	}	984	}
540	}	985	}
541	}	986	}
542	}	987	}
543		988
		989	inline int
		990	time_update_monotonic (EV_P)
		991	{
		992	mn_now = get_clock ();
		993
		994	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		995	{
		996	rt_now = rtmn_diff + mn_now;
		997	return 0;
		998	}
		999	else
		1000	{
		1001	now_floor = mn_now;
		1002	rt_now = ev_time ();
		1003	return 1;
		1004	}
		1005	}
		1006
544	static void	1007	static void
545	time_update ()	1008	time_update (EV_P)
546	{	1009	{
547	int i;	1010	int i;
548		1011
549	ev_now = ev_time ();	1012	#if EV_USE_MONOTONIC
550
551	if (have_monotonic)	1013	if (expect_true (have_monotonic))
552	{	1014	{
553	ev_tstamp odiff = diff;	1015	if (time_update_monotonic (EV_A))
554
555	for (i = 4; --i; ) /* loop a few times, before making important decisions */
556	{	1016	{
557	now = get_clock ();	1017	ev_tstamp odiff = rtmn_diff;
		1018
		1019	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1020	{
558	diff = ev_now - now;	1021	rtmn_diff = rt_now - mn_now;
559		1022
560	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1023	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
561	return; /* all is well */	1024	return; /* all is well */
562		1025
563	ev_now = ev_time ();	1026	rt_now = ev_time ();
		1027	mn_now = get_clock ();
		1028	now_floor = mn_now;
		1029	}
		1030
		1031	periodics_reschedule (EV_A);
		1032	/* no timer adjustment, as the monotonic clock doesn't jump */
		1033	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
564	}	1034	}
565
566	periodics_reschedule (diff - odiff);
567	/* no timer adjustment, as the monotonic clock doesn't jump */
568	}	1035	}
569	else	1036	else
		1037	#endif
570	{	1038	{
571	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1039	rt_now = ev_time ();
		1040
		1041	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
572	{	1042	{
573	periodics_reschedule (ev_now - now);	1043	periodics_reschedule (EV_A);
574		1044
575	/* adjust timers. this is easy, as the offset is the same for all */	1045	/* adjust timers. this is easy, as the offset is the same for all */
576	for (i = 0; i < timercnt; ++i)	1046	for (i = 0; i < timercnt; ++i)
577	timers [i]->at += diff;	1047	((WT)timers [i])->at += rt_now - mn_now;
578	}	1048	}
579		1049
580	now = ev_now;	1050	mn_now = rt_now;
581	}	1051	}
582	}	1052	}
583		1053
584	int ev_loop_done;	1054	void
		1055	ev_ref (EV_P)
		1056	{
		1057	++activecnt;
		1058	}
585		1059
		1060	void
		1061	ev_unref (EV_P)
		1062	{
		1063	--activecnt;
		1064	}
		1065
		1066	static int loop_done;
		1067
		1068	void
586	void ev_loop (int flags)	1069	ev_loop (EV_P_ int flags)
587	{	1070	{
588	double block;	1071	double block;
589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1072	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
590		1073
591	do	1074	do
592	{	1075	{
593	/* queue check watchers (and execute them) */	1076	/* queue check watchers (and execute them) */
594	if (preparecnt)	1077	if (expect_false (preparecnt))
595	{	1078	{
596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1079	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
597	call_pending ();	1080	call_pending (EV_A);
598	}	1081	}
599		1082
		1083	/* we might have forked, so reify kernel state if necessary */
		1084	if (expect_false (postfork))
		1085	loop_fork (EV_A);
		1086
600	/* update fd-related kernel structures */	1087	/* update fd-related kernel structures */
601	fd_reify ();	1088	fd_reify (EV_A);
602		1089
603	/* calculate blocking time */	1090	/* calculate blocking time */
604		1091
605	/* we only need this for !monotonic clockor timers, but as we basically	1092	/* we only need this for !monotonic clockor timers, but as we basically
606	always have timers, we just calculate it always */	1093	always have timers, we just calculate it always */
		1094	#if EV_USE_MONOTONIC
		1095	if (expect_true (have_monotonic))
		1096	time_update_monotonic (EV_A);
		1097	else
		1098	#endif
		1099	{
607	ev_now = ev_time ();	1100	rt_now = ev_time ();
		1101	mn_now = rt_now;
		1102	}
608		1103
609	if (flags & EVLOOP_NONBLOCK || idlecnt)	1104	if (flags & EVLOOP_NONBLOCK || idlecnt)
610	block = 0.;	1105	block = 0.;
611	else	1106	else
612	{	1107	{
613	block = MAX_BLOCKTIME;	1108	block = MAX_BLOCKTIME;
614		1109
615	if (timercnt)	1110	if (timercnt)
616	{	1111	{
617	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1112	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
618	if (block > to) block = to;	1113	if (block > to) block = to;
619	}	1114	}
620		1115
621	if (periodiccnt)	1116	if (periodiccnt)
622	{	1117	{
623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1118	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
624	if (block > to) block = to;	1119	if (block > to) block = to;
625	}	1120	}
626		1121
627	if (block < 0.) block = 0.;	1122	if (block < 0.) block = 0.;
628	}	1123	}
629		1124
630	method_poll (block);	1125	method_poll (EV_A_ block);
631		1126
632	/* update ev_now, do magic */	1127	/* update rt_now, do magic */
633	time_update ();	1128	time_update (EV_A);
634		1129
635	/* queue pending timers and reschedule them */	1130	/* queue pending timers and reschedule them */
636	timers_reify (); /* relative timers called last */	1131	timers_reify (EV_A); /* relative timers called last */
637	periodics_reify (); /* absolute timers called first */	1132	periodics_reify (EV_A); /* absolute timers called first */
638		1133
639	/* queue idle watchers unless io or timers are pending */	1134	/* queue idle watchers unless io or timers are pending */
640	if (!pendingcnt)	1135	if (!pendingcnt)
641	queue_events ((W *)idles, idlecnt, EV_IDLE);	1136	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
642		1137
643	/* queue check watchers, to be executed first */	1138	/* queue check watchers, to be executed first */
644	if (checkcnt)	1139	if (checkcnt)
645	queue_events ((W *)checks, checkcnt, EV_CHECK);	1140	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646		1141
647	call_pending ();	1142	call_pending (EV_A);
648	}	1143	}
649	while (!ev_loop_done);	1144	while (activecnt && !loop_done);
650		1145
651	if (ev_loop_done != 2)	1146	if (loop_done != 2)
652	ev_loop_done = 0;	1147	loop_done = 0;
		1148	}
		1149
		1150	void
		1151	ev_unloop (EV_P_ int how)
		1152	{
		1153	loop_done = how;
653	}	1154	}
654		1155
655	/*****************************************************************************/	1156	/*****************************************************************************/
656		1157
657	static void	1158	inline void
658	wlist_add (WL *head, WL elem)	1159	wlist_add (WL *head, WL elem)
659	{	1160	{
660	elem->next = *head;	1161	elem->next = *head;
661	*head = elem;	1162	*head = elem;
662	}	1163	}
663		1164
664	static void	1165	inline void
665	wlist_del (WL *head, WL elem)	1166	wlist_del (WL *head, WL elem)
666	{	1167	{
667	while (*head)	1168	while (*head)
668	{	1169	{
669	if (*head == elem)	1170	if (*head == elem)
…		…
674		1175
675	head = &(*head)->next;	1176	head = &(*head)->next;
676	}	1177	}
677	}	1178	}
678		1179
679	static void	1180	inline void
680	ev_clear (W w)	1181	ev_clear_pending (EV_P_ W w)
681	{	1182	{
682	if (w->pending)	1183	if (w->pending)
683	{	1184	{
684	pendings [w->pending - 1].w = 0;	1185	pendings [ABSPRI (w)][w->pending - 1].w = 0;
685	w->pending = 0;	1186	w->pending = 0;
686	}	1187	}
687	}	1188	}
688		1189
689	static void	1190	inline void
690	ev_start (W w, int active)	1191	ev_start (EV_P_ W w, int active)
691	{	1192	{
		1193	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1194	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1195
692	w->active = active;	1196	w->active = active;
		1197	ev_ref (EV_A);
693	}	1198	}
694		1199
695	static void	1200	inline void
696	ev_stop (W w)	1201	ev_stop (EV_P_ W w)
697	{	1202	{
		1203	ev_unref (EV_A);
698	w->active = 0;	1204	w->active = 0;
699	}	1205	}
700		1206
701	/*****************************************************************************/	1207	/*****************************************************************************/
702		1208
703	void	1209	void
704	evio_start (struct ev_io *w)	1210	ev_io_start (EV_P_ struct ev_io *w)
705	{	1211	{
		1212	int fd = w->fd;
		1213
706	if (ev_is_active (w))	1214	if (ev_is_active (w))
707	return;	1215	return;
708		1216
709	int fd = w->fd;	1217	assert (("ev_io_start called with negative fd", fd >= 0));
710		1218
711	ev_start ((W)w, 1);	1219	ev_start (EV_A_ (W)w, 1);
712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1220	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
713	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1221	wlist_add ((WL *)&anfds[fd].head, (WL)w);
714		1222
715	++fdchangecnt;	1223	fd_change (EV_A_ fd);
716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717	fdchanges [fdchangecnt - 1] = fd;
718	}	1224	}
719		1225
720	void	1226	void
721	evio_stop (struct ev_io *w)	1227	ev_io_stop (EV_P_ struct ev_io *w)
722	{	1228	{
723	ev_clear ((W)w);	1229	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1230	if (!ev_is_active (w))
725	return;	1231	return;
726		1232
727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1233	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
729		1235
730	++fdchangecnt;	1236	fd_change (EV_A_ w->fd);
731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732	fdchanges [fdchangecnt - 1] = w->fd;
733	}	1237	}
734		1238
735	void	1239	void
736	evtimer_start (struct ev_timer *w)	1240	ev_timer_start (EV_P_ struct ev_timer *w)
737	{	1241	{
738	if (ev_is_active (w))	1242	if (ev_is_active (w))
739	return;	1243	return;
740		1244
741	w->at += now;	1245	((WT)w)->at += mn_now;
742		1246
743	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1247	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
744		1248
745	ev_start ((W)w, ++timercnt);	1249	ev_start (EV_A_ (W)w, ++timercnt);
746	array_needsize (timers, timermax, timercnt, );	1250	array_needsize (timers, timermax, timercnt, (void));
747	timers [timercnt - 1] = w;	1251	timers [timercnt - 1] = w;
748	upheap ((WT *)timers, timercnt - 1);	1252	upheap ((WT *)timers, timercnt - 1);
749	}
750		1253
		1254	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1255	}
		1256
751	void	1257	void
752	evtimer_stop (struct ev_timer *w)	1258	ev_timer_stop (EV_P_ struct ev_timer *w)
753	{	1259	{
754	ev_clear ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
755	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
756	return;	1262	return;
757		1263
		1264	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1265
758	if (w->active < timercnt--)	1266	if (((W)w)->active < timercnt--)
759	{	1267	{
760	timers [w->active - 1] = timers [timercnt];	1268	timers [((W)w)->active - 1] = timers [timercnt];
761	downheap ((WT *)timers, timercnt, w->active - 1);	1269	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
762	}	1270	}
763		1271
764	w->at = w->repeat;	1272	((WT)w)->at = w->repeat;
765		1273
766	ev_stop ((W)w);	1274	ev_stop (EV_A_ (W)w);
767	}	1275	}
768		1276
769	void	1277	void
770	evtimer_again (struct ev_timer *w)	1278	ev_timer_again (EV_P_ struct ev_timer *w)
771	{	1279	{
772	if (ev_is_active (w))	1280	if (ev_is_active (w))
773	{	1281	{
774	if (w->repeat)	1282	if (w->repeat)
775	{	1283	{
776	w->at = now + w->repeat;	1284	((WT)w)->at = mn_now + w->repeat;
777	downheap ((WT *)timers, timercnt, w->active - 1);	1285	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
778	}	1286	}
779	else	1287	else
780	evtimer_stop (w);	1288	ev_timer_stop (EV_A_ w);
781	}	1289	}
782	else if (w->repeat)	1290	else if (w->repeat)
783	evtimer_start (w);	1291	ev_timer_start (EV_A_ w);
784	}	1292	}
785		1293
786	void	1294	void
787	evperiodic_start (struct ev_periodic *w)	1295	ev_periodic_start (EV_P_ struct ev_periodic *w)
788	{	1296	{
789	if (ev_is_active (w))	1297	if (ev_is_active (w))
790	return;	1298	return;
791		1299
792	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1300	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
793		1301
794	/* this formula differs from the one in periodic_reify because we do not always round up */	1302	/* this formula differs from the one in periodic_reify because we do not always round up */
795	if (w->interval)	1303	if (w->interval)
796	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1304	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
797		1305
798	ev_start ((W)w, ++periodiccnt);	1306	ev_start (EV_A_ (W)w, ++periodiccnt);
799	array_needsize (periodics, periodicmax, periodiccnt, );	1307	array_needsize (periodics, periodicmax, periodiccnt, (void));
800	periodics [periodiccnt - 1] = w;	1308	periodics [periodiccnt - 1] = w;
801	upheap ((WT *)periodics, periodiccnt - 1);	1309	upheap ((WT *)periodics, periodiccnt - 1);
802	}
803		1310
		1311	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1312	}
		1313
804	void	1314	void
805	evperiodic_stop (struct ev_periodic *w)	1315	ev_periodic_stop (EV_P_ struct ev_periodic *w)
806	{	1316	{
807	ev_clear ((W)w);	1317	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1318	if (!ev_is_active (w))
809	return;	1319	return;
810		1320
		1321	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1322
811	if (w->active < periodiccnt--)	1323	if (((W)w)->active < periodiccnt--)
812	{	1324	{
813	periodics [w->active - 1] = periodics [periodiccnt];	1325	periodics [((W)w)->active - 1] = periodics [periodiccnt];
814	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1326	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
815	}	1327	}
816		1328
817	ev_stop ((W)w);	1329	ev_stop (EV_A_ (W)w);
818	}	1330	}
819		1331
820	void	1332	void
821	evsignal_start (struct ev_signal *w)	1333	ev_idle_start (EV_P_ struct ev_idle *w)
822	{	1334	{
823	if (ev_is_active (w))	1335	if (ev_is_active (w))
824	return;	1336	return;
825		1337
		1338	ev_start (EV_A_ (W)w, ++idlecnt);
		1339	array_needsize (idles, idlemax, idlecnt, (void));
		1340	idles [idlecnt - 1] = w;
		1341	}
		1342
		1343	void
		1344	ev_idle_stop (EV_P_ struct ev_idle *w)
		1345	{
		1346	ev_clear_pending (EV_A_ (W)w);
		1347	if (ev_is_active (w))
		1348	return;
		1349
		1350	idles [((W)w)->active - 1] = idles [--idlecnt];
		1351	ev_stop (EV_A_ (W)w);
		1352	}
		1353
		1354	void
		1355	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1356	{
		1357	if (ev_is_active (w))
		1358	return;
		1359
		1360	ev_start (EV_A_ (W)w, ++preparecnt);
		1361	array_needsize (prepares, preparemax, preparecnt, (void));
		1362	prepares [preparecnt - 1] = w;
		1363	}
		1364
		1365	void
		1366	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1367	{
		1368	ev_clear_pending (EV_A_ (W)w);
		1369	if (ev_is_active (w))
		1370	return;
		1371
		1372	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1373	ev_stop (EV_A_ (W)w);
		1374	}
		1375
		1376	void
		1377	ev_check_start (EV_P_ struct ev_check *w)
		1378	{
		1379	if (ev_is_active (w))
		1380	return;
		1381
		1382	ev_start (EV_A_ (W)w, ++checkcnt);
		1383	array_needsize (checks, checkmax, checkcnt, (void));
		1384	checks [checkcnt - 1] = w;
		1385	}
		1386
		1387	void
		1388	ev_check_stop (EV_P_ struct ev_check *w)
		1389	{
		1390	ev_clear_pending (EV_A_ (W)w);
		1391	if (ev_is_active (w))
		1392	return;
		1393
		1394	checks [((W)w)->active - 1] = checks [--checkcnt];
		1395	ev_stop (EV_A_ (W)w);
		1396	}
		1397
		1398	#ifndef SA_RESTART
		1399	# define SA_RESTART 0
		1400	#endif
		1401
		1402	void
		1403	ev_signal_start (EV_P_ struct ev_signal *w)
		1404	{
		1405	#if EV_MULTIPLICITY
		1406	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1407	#endif
		1408	if (ev_is_active (w))
		1409	return;
		1410
		1411	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1412
826	ev_start ((W)w, 1);	1413	ev_start (EV_A_ (W)w, 1);
827	array_needsize (signals, signalmax, w->signum, signals_init);	1414	array_needsize (signals, signalmax, w->signum, signals_init);
828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1415	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829		1416
830	if (!w->next)	1417	if (!((WL)w)->next)
831	{	1418	{
		1419	#if WIN32
		1420	signal (w->signum, sighandler);
		1421	#else
832	struct sigaction sa;	1422	struct sigaction sa;
833	sa.sa_handler = sighandler;	1423	sa.sa_handler = sighandler;
834	sigfillset (&sa.sa_mask);	1424	sigfillset (&sa.sa_mask);
835	sa.sa_flags = 0;	1425	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836	sigaction (w->signum, &sa, 0);	1426	sigaction (w->signum, &sa, 0);
		1427	#endif
837	}	1428	}
838	}	1429	}
839		1430
840	void	1431	void
841	evsignal_stop (struct ev_signal *w)	1432	ev_signal_stop (EV_P_ struct ev_signal *w)
842	{	1433	{
843	ev_clear ((W)w);	1434	ev_clear_pending (EV_A_ (W)w);
844	if (!ev_is_active (w))	1435	if (!ev_is_active (w))
845	return;	1436	return;
846		1437
847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1438	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848	ev_stop ((W)w);	1439	ev_stop (EV_A_ (W)w);
849		1440
850	if (!signals [w->signum - 1].head)	1441	if (!signals [w->signum - 1].head)
851	signal (w->signum, SIG_DFL);	1442	signal (w->signum, SIG_DFL);
852	}	1443	}
853		1444
854	void evidle_start (struct ev_idle *w)	1445	void
		1446	ev_child_start (EV_P_ struct ev_child *w)
855	{	1447	{
		1448	#if EV_MULTIPLICITY
		1449	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1450	#endif
856	if (ev_is_active (w))	1451	if (ev_is_active (w))
857	return;	1452	return;
858		1453
859	ev_start ((W)w, ++idlecnt);	1454	ev_start (EV_A_ (W)w, 1);
860	array_needsize (idles, idlemax, idlecnt, );	1455	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
861	idles [idlecnt - 1] = w;
862	}	1456	}
863		1457
864	void evidle_stop (struct ev_idle *w)	1458	void
		1459	ev_child_stop (EV_P_ struct ev_child *w)
865	{	1460	{
866	ev_clear ((W)w);	1461	ev_clear_pending (EV_A_ (W)w);
867	if (ev_is_active (w))	1462	if (ev_is_active (w))
868	return;	1463	return;
869		1464
870	idles [w->active - 1] = idles [--idlecnt];
871	ev_stop ((W)w);
872	}
873
874	void evprepare_start (struct ev_prepare *w)
875	{
876	if (ev_is_active (w))
877	return;
878
879	ev_start ((W)w, ++preparecnt);
880	array_needsize (prepares, preparemax, preparecnt, );
881	prepares [preparecnt - 1] = w;
882	}
883
884	void evprepare_stop (struct ev_prepare *w)
885	{
886	ev_clear ((W)w);
887	if (ev_is_active (w))
888	return;
889
890	prepares [w->active - 1] = prepares [--preparecnt];
891	ev_stop ((W)w);
892	}
893
894	void evcheck_start (struct ev_check *w)
895	{
896	if (ev_is_active (w))
897	return;
898
899	ev_start ((W)w, ++checkcnt);
900	array_needsize (checks, checkmax, checkcnt, );
901	checks [checkcnt - 1] = w;
902	}
903
904	void evcheck_stop (struct ev_check *w)
905	{
906	ev_clear ((W)w);
907	if (ev_is_active (w))
908	return;
909
910	checks [w->active - 1] = checks [--checkcnt];
911	ev_stop ((W)w);
912	}
913
914	void evchild_start (struct ev_child *w)
915	{
916	if (ev_is_active (w))
917	return;
918
919	ev_start ((W)w, 1);
920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921	}
922
923	void evchild_stop (struct ev_child *w)
924	{
925	ev_clear ((W)w);
926	if (ev_is_active (w))
927	return;
928
929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1465	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	ev_stop ((W)w);	1466	ev_stop (EV_A_ (W)w);
931	}	1467	}
932		1468
933	/*****************************************************************************/	1469	/*****************************************************************************/
934		1470
935	struct ev_once	1471	struct ev_once
…		…
939	void (*cb)(int revents, void *arg);	1475	void (*cb)(int revents, void *arg);
940	void *arg;	1476	void *arg;
941	};	1477	};
942		1478
943	static void	1479	static void
944	once_cb (struct ev_once *once, int revents)	1480	once_cb (EV_P_ struct ev_once *once, int revents)
945	{	1481	{
946	void (*cb)(int revents, void *arg) = once->cb;	1482	void (*cb)(int revents, void *arg) = once->cb;
947	void *arg = once->arg;	1483	void *arg = once->arg;
948		1484
949	evio_stop (&once->io);	1485	ev_io_stop (EV_A_ &once->io);
950	evtimer_stop (&once->to);	1486	ev_timer_stop (EV_A_ &once->to);
951	free (once);	1487	ev_free (once);
952		1488
953	cb (revents, arg);	1489	cb (revents, arg);
954	}	1490	}
955		1491
956	static void	1492	static void
957	once_cb_io (struct ev_io *w, int revents)	1493	once_cb_io (EV_P_ struct ev_io *w, int revents)
958	{	1494	{
959	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1495	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
960	}	1496	}
961		1497
962	static void	1498	static void
963	once_cb_to (struct ev_timer *w, int revents)	1499	once_cb_to (EV_P_ struct ev_timer *w, int revents)
964	{	1500	{
965	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1501	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
966	}	1502	}
967		1503
968	void	1504	void
969	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1505	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
970	{	1506	{
971	struct ev_once *once = malloc (sizeof (struct ev_once));	1507	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
972		1508
973	if (!once)	1509	if (!once)
974	cb (EV_ERROR, arg);	1510	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
975	else	1511	else
976	{	1512	{
977	once->cb = cb;	1513	once->cb = cb;
978	once->arg = arg;	1514	once->arg = arg;
979		1515
980	evw_init (&once->io, once_cb_io);	1516	ev_watcher_init (&once->io, once_cb_io);
981
982	if (fd >= 0)	1517	if (fd >= 0)
983	{	1518	{
984	evio_set (&once->io, fd, events);	1519	ev_io_set (&once->io, fd, events);
985	evio_start (&once->io);	1520	ev_io_start (EV_A_ &once->io);
986	}	1521	}
987		1522
988	evw_init (&once->to, once_cb_to);	1523	ev_watcher_init (&once->to, once_cb_to);
989
990	if (timeout >= 0.)	1524	if (timeout >= 0.)
991	{	1525	{
992	evtimer_set (&once->to, timeout, 0.);	1526	ev_timer_set (&once->to, timeout, 0.);
993	evtimer_start (&once->to);	1527	ev_timer_start (EV_A_ &once->to);
994	}	1528	}
995	}	1529	}
996	}	1530	}
997		1531
998	/*****************************************************************************/
999
1000	#if 0
1001
1002	struct ev_io wio;
1003
1004	static void
1005	sin_cb (struct ev_io *w, int revents)
1006	{
1007	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1008	}
1009
1010	static void
1011	ocb (struct ev_timer *w, int revents)
1012	{
1013	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1014	evtimer_stop (w);
1015	evtimer_start (w);
1016	}
1017
1018	static void
1019	scb (struct ev_signal *w, int revents)
1020	{
1021	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022	evio_stop (&wio);
1023	evio_start (&wio);
1024	}
1025
1026	static void
1027	gcb (struct ev_signal *w, int revents)
1028	{
1029	fprintf (stderr, "generic %x\n", revents);
1030
1031	}
1032
1033	int main (void)
1034	{
1035	ev_init (0);
1036
1037	evio_init (&wio, sin_cb, 0, EV_READ);
1038	evio_start (&wio);
1039
1040	struct ev_timer t[10000];
1041
1042	#if 0
1043	int i;
1044	for (i = 0; i < 10000; ++i)
1045	{
1046	struct ev_timer *w = t + i;
1047	evw_init (w, ocb, i);
1048	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049	evtimer_start (w);
1050	if (drand48 () < 0.5)
1051	evtimer_stop (w);
1052	}
1053	#endif
1054
1055	struct ev_timer t1;
1056	evtimer_init (&t1, ocb, 5, 10);
1057	evtimer_start (&t1);
1058
1059	struct ev_signal sig;
1060	evsignal_init (&sig, scb, SIGQUIT);
1061	evsignal_start (&sig);
1062
1063	struct ev_check cw;
1064	evcheck_init (&cw, gcb);
1065	evcheck_start (&cw);
1066
1067	struct ev_idle iw;
1068	evidle_init (&iw, gcb);
1069	evidle_start (&iw);
1070
1071	ev_loop (0);
1072
1073	return 0;
1074	}
1075
1076	#endif
1077
1078
1079
1080

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