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Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.74 by root, Tue Nov 6 16:51:20 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
63	#ifndef EV_USE_REALTIME	108	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
65	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
66		125
67	#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) */
68	#define MAX_BLOCKTIME 59.731	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
70		130
71	#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)
72		146
73	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
76		150
77	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80		152
81	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
82
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		154
87	/*****************************************************************************/	155	/*****************************************************************************/
88		156
89	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
90	ev_time (void)	239	ev_time (void)
91	{	240	{
92	#if EV_USE_REALTIME	241	#if EV_USE_REALTIME
93	struct timespec ts;	242	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	249	#endif
101	}	250	}
102		251
103	static ev_tstamp	252	inline ev_tstamp
104	get_clock (void)	253	get_clock (void)
105	{	254	{
106	#if EV_USE_MONOTONIC	255	#if EV_USE_MONOTONIC
107	if (have_monotonic)	256	if (expect_true (have_monotonic))
108	{	257	{
109	struct timespec ts;	258	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	261	}
113	#endif	262	#endif
114		263
115	return ev_time ();	264	return ev_time ();
116	}	265	}
117		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
118	#define array_roundsize(base,n) ((n) | 4 & ~3)	273	#define array_roundsize(type,n) ((n) | 4 & ~3)
119		274
120	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
121	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
122	{ \	277	{ \
123	int newcnt = cur; \	278	int newcnt = cur; \
124	do \	279	do \
125	{ \	280	{ \
126	newcnt = array_roundsize (base, newcnt << 1); \	281	newcnt = array_roundsize (type, newcnt << 1); \
127	} \	282	} \
128	while ((cnt) > newcnt); \	283	while ((cnt) > newcnt); \
129	\	284	\
130	base = realloc (base, sizeof (*base) * (newcnt)); \	285	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
131	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
132	cur = newcnt; \	287	cur = newcnt; \
133	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
134		305
135	/*****************************************************************************/	306	/*****************************************************************************/
136
137	typedef struct
138	{
139	struct ev_io *head;
140	int events;
141	} ANFD;
142
143	static ANFD *anfds;
144	static int anfdmax;
145		307
146	static void	308	static void
147	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
148	{	310	{
149	while (count--)	311	while (count--)
150	{	312	{
151	base->head = 0;	313	base->head = 0;
152	base->events = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
153	++base;	317	++base;
154	}	318	}
155	}	319	}
156		320
157	typedef struct
158	{
159	W w;
160	int events;
161	} ANPENDING;
162
163	static ANPENDING *pendings;
164	static int pendingmax, pendingcnt;
165
166	static void	321	static void
167	event (W w, int events)	322	event (EV_P_ W w, int events)
168	{	323	{
		324	if (w->pending)
		325	{
		326	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		327	return;
		328	}
		329
169	w->pending = ++pendingcnt;	330	w->pending = ++pendingcnt [ABSPRI (w)];
170	array_needsize (pendings, pendingmax, pendingcnt, );	331	array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
171	pendings [pendingcnt - 1].w = w;	332	pendings [ABSPRI (w)][w->pending - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	333	pendings [ABSPRI (w)][w->pending - 1].events = events;
173	}	334	}
174		335
175	static void	336	static void
176	queue_events (W *events, int eventcnt, int type)	337	queue_events (EV_P_ W *events, int eventcnt, int type)
177	{	338	{
178	int i;	339	int i;
179		340
180	for (i = 0; i < eventcnt; ++i)	341	for (i = 0; i < eventcnt; ++i)
181	event (events [i], type);	342	event (EV_A_ events [i], type);
182	}	343	}
183		344
184	static void	345	static void
185	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
186	{	347	{
187	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
188	struct ev_io *w;	349	struct ev_io *w;
189		350
190	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
191	{	352	{
192	int ev = w->events & events;	353	int ev = w->events & events;
193		354
194	if (ev)	355	if (ev)
195	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
196	}	357	}
197	}	358	}
198		359
199	/*****************************************************************************/	360	/*****************************************************************************/
200		361
201	static int *fdchanges;
202	static int fdchangemax, fdchangecnt;
203
204	static void	362	static void
205	fd_reify (void)	363	fd_reify (EV_P)
206	{	364	{
207	int i;	365	int i;
208		366
209	for (i = 0; i < fdchangecnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
210	{	368	{
…		…
212	ANFD *anfd = anfds + fd;	370	ANFD *anfd = anfds + fd;
213	struct ev_io *w;	371	struct ev_io *w;
214		372
215	int events = 0;	373	int events = 0;
216		374
217	for (w = anfd->head; w; w = w->next)	375	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
218	events |= w->events;	376	events |= w->events;
219		377
220	anfd->events &= ~EV_REIFY;	378	anfd->reify = 0;
221		379
222	if (anfd->events != events)
223	{
224	method_modify (fd, anfd->events, events);	380	method_modify (EV_A_ fd, anfd->events, events);
225	anfd->events = events;	381	anfd->events = events;
226	}
227	}	382	}
228		383
229	fdchangecnt = 0;	384	fdchangecnt = 0;
230	}	385	}
231		386
232	static void	387	static void
233	fd_change (int fd)	388	fd_change (EV_P_ int fd)
234	{	389	{
235	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	390	if (anfds [fd].reify)
236	return;	391	return;
237		392
238	anfds [fd].events |= EV_REIFY;	393	anfds [fd].reify = 1;
239		394
240	++fdchangecnt;	395	++fdchangecnt;
241	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	396	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
242	fdchanges [fdchangecnt - 1] = fd;	397	fdchanges [fdchangecnt - 1] = fd;
243	}	398	}
244		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
245	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
246	static void	423	static void
247	fd_recheck (void)	424	fd_ebadf (EV_P)
248	{	425	{
249	int fd;	426	int fd;
250		427
251	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
252	if (anfds [fd].events)	429	if (anfds [fd].events)
253	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
254	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)
255	{	442	{
256	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	443	fd_kill (EV_A_ fd);
257	ev_io_stop (anfds [fd].head);	444	return;
258	}	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	}
259	}	461	}
260		462
261	/*****************************************************************************/	463	/*****************************************************************************/
262		464
263	static struct ev_timer **timers;
264	static int timermax, timercnt;
265
266	static struct ev_periodic **periodics;
267	static int periodicmax, periodiccnt;
268
269	static void	465	static void
270	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
271	{	467	{
272	WT w = timers [k];	468	WT w = heap [k];
273		469
274	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
275	{	471	{
276	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
277	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
278	k >>= 1;	474	k >>= 1;
279	}	475	}
280		476
281	timers [k] = w;	477	heap [k] = w;
282	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
283		479
284	}	480	}
285		481
286	static void	482	static void
287	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
288	{	484	{
289	WT w = timers [k];	485	WT w = heap [k];
290		486
291	while (k < (N >> 1))	487	while (k < (N >> 1))
292	{	488	{
293	int j = k << 1;	489	int j = k << 1;
294		490
295	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296	++j;	492	++j;
297		493
298	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
299	break;	495	break;
300		496
301	timers [k] = timers [j];	497	heap [k] = heap [j];
302	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
303	k = j;	499	k = j;
304	}	500	}
305		501
306	timers [k] = w;	502	heap [k] = w;
307	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
308	}	504	}
309		505
310	/*****************************************************************************/	506	/*****************************************************************************/
311		507
312	typedef struct	508	typedef struct
313	{	509	{
314	struct ev_signal *head;	510	WL head;
315	sig_atomic_t gotsig;	511	sig_atomic_t volatile gotsig;
316	} ANSIG;	512	} ANSIG;
317		513
318	static ANSIG *signals;	514	static ANSIG *signals;
319	static int signalmax;	515	static int signalmax;
320		516
321	static int sigpipe [2];	517	static int sigpipe [2];
322	static sig_atomic_t gotsig;	518	static sig_atomic_t volatile gotsig;
323	static struct ev_io sigev;	519	static struct ev_io sigev;
324		520
325	static void	521	static void
326	signals_init (ANSIG *base, int count)	522	signals_init (ANSIG *base, int count)
327	{	523	{
328	while (count--)	524	while (count--)
329	{	525	{
330	base->head = 0;	526	base->head = 0;
331	base->gotsig = 0;	527	base->gotsig = 0;
		528
332	++base;	529	++base;
333	}	530	}
334	}	531	}
335		532
336	static void	533	static void
337	sighandler (int signum)	534	sighandler (int signum)
338	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
339	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
340		541
341	if (!gotsig)	542	if (!gotsig)
342	{	543	{
		544	int old_errno = errno;
343	gotsig = 1;	545	gotsig = 1;
344	write (sigpipe [1], &gotsig, 1);	546	write (sigpipe [1], &signum, 1);
		547	errno = old_errno;
345	}	548	}
346	}	549	}
347		550
348	static void	551	static void
349	sigcb (struct ev_io *iow, int revents)	552	sigcb (EV_P_ struct ev_io *iow, int revents)
350	{	553	{
351	struct ev_signal *w;	554	WL w;
352	int sig;	555	int signum;
353		556
		557	read (sigpipe [0], &revents, 1);
354	gotsig = 0;	558	gotsig = 0;
355	read (sigpipe [0], &revents, 1);
356		559
357	for (sig = signalmax; sig--; )	560	for (signum = signalmax; signum--; )
358	if (signals [sig].gotsig)	561	if (signals [signum].gotsig)
359	{	562	{
360	signals [sig].gotsig = 0;	563	signals [signum].gotsig = 0;
361		564
362	for (w = signals [sig].head; w; w = w->next)	565	for (w = signals [signum].head; w; w = w->next)
363	event ((W)w, EV_SIGNAL);	566	event (EV_A_ (W)w, EV_SIGNAL);
364	}	567	}
365	}	568	}
366		569
367	static void	570	static void
368	siginit (void)	571	siginit (EV_P)
369	{	572	{
		573	#ifndef WIN32
370	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	574	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
371	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	575	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372		576
373	/* rather than sort out wether we really need nb, set it */	577	/* rather than sort out wether we really need nb, set it */
374	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	578	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
375	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	579	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		580	#endif
376		581
377	ev_io_set (&sigev, sigpipe [0], EV_READ);	582	ev_io_set (&sigev, sigpipe [0], EV_READ);
378	ev_io_start (&sigev);	583	ev_io_start (EV_A_ &sigev);
		584	ev_unref (EV_A); /* child watcher should not keep loop alive */
379	}	585	}
380		586
381	/*****************************************************************************/	587	/*****************************************************************************/
382		588
383	static struct ev_idle **idles;
384	static int idlemax, idlecnt;
385
386	static struct ev_prepare **prepares;
387	static int preparemax, preparecnt;
388
389	static struct ev_check **checks;
390	static int checkmax, checkcnt;
391
392	/*****************************************************************************/
393
394	static struct ev_child *childs [PID_HASHSIZE];	589	static struct ev_child *childs [PID_HASHSIZE];
		590
		591	#ifndef WIN32
		592
395	static struct ev_signal childev;	593	static struct ev_signal childev;
396		594
397	#ifndef WCONTINUED	595	#ifndef WCONTINUED
398	# define WCONTINUED 0	596	# define WCONTINUED 0
399	#endif	597	#endif
400		598
401	static void	599	static void
402	childcb (struct ev_signal *sw, int revents)	600	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403	{	601	{
404	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	{
405	int pid, status;	617	int pid, status;
406		618
407	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	619	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
408	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	620	{
409	if (w->pid == pid || w->pid == -1)	621	/* make sure we are called again until all childs have been reaped */
410	{	622	event (EV_A_ (W)sw, EV_SIGNAL);
411	w->status = status;	623
412	event ((W)w, EV_CHILD);	624	child_reap (EV_A_ sw, pid, pid, status);
413	}	625	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		626	}
414	}	627	}
		628
		629	#endif
415		630
416	/*****************************************************************************/	631	/*****************************************************************************/
417		632
		633	#if EV_USE_KQUEUE
		634	# include "ev_kqueue.c"
		635	#endif
418	#if EV_USE_EPOLL	636	#if EV_USE_EPOLL
419	# include "ev_epoll.c"	637	# include "ev_epoll.c"
420	#endif	638	#endif
		639	#if EV_USE_POLL
		640	# include "ev_poll.c"
		641	#endif
421	#if EV_USE_SELECT	642	#if EV_USE_SELECT
422	# include "ev_select.c"	643	# include "ev_select.c"
423	#endif	644	#endif
424		645
425	int	646	int
…		…
432	ev_version_minor (void)	653	ev_version_minor (void)
433	{	654	{
434	return EV_VERSION_MINOR;	655	return EV_VERSION_MINOR;
435	}	656	}
436		657
437	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)
438	{	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	{
439	if (!ev_method)	679	if (!method)
440	{	680	{
441	#if EV_USE_MONOTONIC	681	#if EV_USE_MONOTONIC
442	{	682	{
443	struct timespec ts;	683	struct timespec ts;
444	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	684	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445	have_monotonic = 1;	685	have_monotonic = 1;
446	}	686	}
447	#endif	687	#endif
448		688
449	ev_now = ev_time ();	689	rt_now = ev_time ();
450	now = get_clock ();	690	mn_now = get_clock ();
		691	now_floor = mn_now;
451	diff = ev_now - now;	692	rtmn_diff = rt_now - mn_now;
452		693
453	if (pipe (sigpipe))	694	if (methods == EVMETHOD_AUTO)
454	return 0;	695	if (!enable_secure () && getenv ("LIBEV_METHODS"))
455		696	methods = atoi (getenv ("LIBEV_METHODS"));
		697	else
456	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
457	#if EV_USE_EPOLL	707	#if EV_USE_EPOLL
458	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);
459	#endif	712	#endif
460	#if EV_USE_SELECT	713	#if EV_USE_SELECT
461	if (ev_method == EVMETHOD_NONE) select_init (flags);	714	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
462	#endif	715	#endif
463		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
464	if (ev_method)	842	if (ev_method (EV_A))
465	{	843	{
466	ev_watcher_init (&sigev, sigcb);
467	siginit ();	844	siginit (EV_A);
468		845
		846	#ifndef WIN32
469	ev_signal_init (&childev, childcb, SIGCHLD);	847	ev_signal_init (&childev, childcb, SIGCHLD);
		848	ev_set_priority (&childev, EV_MAXPRI);
470	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
471	}	852	}
		853	else
		854	default_loop = 0;
472	}	855	}
473		856
474	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;
475	}	890	}
476		891
477	/*****************************************************************************/	892	/*****************************************************************************/
478		893
479	void
480	ev_prefork (void)
481	{
482	/* nop */
483	}
484
485	void
486	ev_postfork_parent (void)
487	{
488	/* nop */
489	}
490
491	void
492	ev_postfork_child (void)
493	{
494	#if EV_USE_EPOLL
495	if (ev_method == EVMETHOD_EPOLL)
496	epoll_postfork_child ();
497	#endif
498
499	ev_io_stop (&sigev);
500	close (sigpipe [0]);
501	close (sigpipe [1]);
502	pipe (sigpipe);
503	siginit ();
504	}
505
506	/*****************************************************************************/
507
508	static void	894	static void
509	call_pending (void)	895	call_pending (EV_P)
510	{	896	{
		897	int pri;
		898
		899	for (pri = NUMPRI; pri--; )
511	while (pendingcnt)	900	while (pendingcnt [pri])
512	{	901	{
513	ANPENDING *p = pendings + --pendingcnt;	902	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514		903
515	if (p->w)	904	if (p->w)
516	{	905	{
517	p->w->pending = 0;	906	p->w->pending = 0;
518	p->w->cb (p->w, p->events);	907	p->w->cb (EV_A_ p->w, p->events);
519	}	908	}
520	}	909	}
521	}	910	}
522		911
523	static void	912	static void
524	timers_reify (void)	913	timers_reify (EV_P)
525	{	914	{
526	while (timercnt && timers [0]->at <= now)	915	while (timercnt && ((WT)timers [0])->at <= mn_now)
527	{	916	{
528	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)));
529		920
530	/* first reschedule or stop timer */	921	/* first reschedule or stop timer */
531	if (w->repeat)	922	if (w->repeat)
532	{	923	{
		924	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	925	((WT)w)->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	926	downheap ((WT *)timers, timercnt, 0);
536	}	927	}
537	else	928	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	929	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539		930
540	event ((W)w, EV_TIMEOUT);	931	event (EV_A_ (W)w, EV_TIMEOUT);
541	}	932	}
542	}	933	}
543		934
544	static void	935	static void
545	periodics_reify (void)	936	periodics_reify (EV_P)
546	{	937	{
547	while (periodiccnt && periodics [0]->at <= ev_now)	938	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
548	{	939	{
549	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)));
550		943
551	/* first reschedule or stop timer */	944	/* first reschedule or stop timer */
552	if (w->interval)	945	if (w->interval)
553	{	946	{
554	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;
555	assert (("periodic timeout in the past, 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));
556	downheap ((WT *)periodics, periodiccnt, 0);	949	downheap ((WT *)periodics, periodiccnt, 0);
557	}	950	}
558	else	951	else
559	ev_periodic_stop (w); /* nonrepeating: stop timer */	952	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560		953
561	event ((W)w, EV_TIMEOUT);	954	event (EV_A_ (W)w, EV_PERIODIC);
562	}	955	}
563	}	956	}
564		957
565	static void	958	static void
566	periodics_reschedule (ev_tstamp diff)	959	periodics_reschedule (EV_P)
567	{	960	{
568	int i;	961	int i;
569		962
570	/* adjust periodics after time jump */	963	/* adjust periodics after time jump */
571	for (i = 0; i < periodiccnt; ++i)	964	for (i = 0; i < periodiccnt; ++i)
572	{	965	{
573	struct ev_periodic *w = periodics [i];	966	struct ev_periodic *w = periodics [i];
574		967
575	if (w->interval)	968	if (w->interval)
576	{	969	{
577	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;
578		971
579	if (fabs (diff) >= 1e-4)	972	if (fabs (diff) >= 1e-4)
580	{	973	{
581	ev_periodic_stop (w);	974	ev_periodic_stop (EV_A_ w);
582	ev_periodic_start (w);	975	ev_periodic_start (EV_A_ w);
583		976
584	i = 0; /* restart loop, inefficient, but time jumps should be rare */	977	i = 0; /* restart loop, inefficient, but time jumps should be rare */
585	}	978	}
586	}	979	}
587	}	980	}
588	}	981	}
589		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
590	static void	1001	static void
591	time_update (void)	1002	time_update (EV_P)
592	{	1003	{
593	int i;	1004	int i;
594		1005
595	ev_now = ev_time ();	1006	#if EV_USE_MONOTONIC
596
597	if (have_monotonic)	1007	if (expect_true (have_monotonic))
598	{	1008	{
599	ev_tstamp odiff = diff;	1009	if (time_update_monotonic (EV_A))
600
601	for (i = 4; --i; ) /* loop a few times, before making important decisions */
602	{	1010	{
603	now = get_clock ();	1011	ev_tstamp odiff = rtmn_diff;
		1012
		1013	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1014	{
604	diff = ev_now - now;	1015	rtmn_diff = rt_now - mn_now;
605		1016
606	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1017	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
607	return; /* all is well */	1018	return; /* all is well */
608		1019
609	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) */
610	}	1028	}
611
612	periodics_reschedule (diff - odiff);
613	/* no timer adjustment, as the monotonic clock doesn't jump */
614	}	1029	}
615	else	1030	else
		1031	#endif
616	{	1032	{
617	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))
618	{	1036	{
619	periodics_reschedule (ev_now - now);	1037	periodics_reschedule (EV_A);
620		1038
621	/* 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 */
622	for (i = 0; i < timercnt; ++i)	1040	for (i = 0; i < timercnt; ++i)
623	timers [i]->at += diff;	1041	((WT)timers [i])->at += rt_now - mn_now;
624	}	1042	}
625		1043
626	now = ev_now;	1044	mn_now = rt_now;
627	}	1045	}
628	}	1046	}
629		1047
630	int ev_loop_done;	1048	void
		1049	ev_ref (EV_P)
		1050	{
		1051	++activecnt;
		1052	}
631		1053
		1054	void
		1055	ev_unref (EV_P)
		1056	{
		1057	--activecnt;
		1058	}
		1059
		1060	static int loop_done;
		1061
		1062	void
632	void ev_loop (int flags)	1063	ev_loop (EV_P_ int flags)
633	{	1064	{
634	double block;	1065	double block;
635	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1066	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
636		1067
637	do	1068	do
638	{	1069	{
639	/* queue check watchers (and execute them) */	1070	/* queue check watchers (and execute them) */
640	if (preparecnt)	1071	if (expect_false (preparecnt))
641	{	1072	{
642	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1073	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643	call_pending ();	1074	call_pending (EV_A);
644	}	1075	}
645		1076
		1077	/* we might have forked, so reify kernel state if necessary */
		1078	if (expect_false (postfork))
		1079	loop_fork (EV_A);
		1080
646	/* update fd-related kernel structures */	1081	/* update fd-related kernel structures */
647	fd_reify ();	1082	fd_reify (EV_A);
648		1083
649	/* calculate blocking time */	1084	/* calculate blocking time */
650		1085
651	/* 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
652	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	{
653	ev_now = ev_time ();	1094	rt_now = ev_time ();
		1095	mn_now = rt_now;
		1096	}
654		1097
655	if (flags & EVLOOP_NONBLOCK || idlecnt)	1098	if (flags & EVLOOP_NONBLOCK || idlecnt)
656	block = 0.;	1099	block = 0.;
657	else	1100	else
658	{	1101	{
659	block = MAX_BLOCKTIME;	1102	block = MAX_BLOCKTIME;
660		1103
661	if (timercnt)	1104	if (timercnt)
662	{	1105	{
663	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;
664	if (block > to) block = to;	1107	if (block > to) block = to;
665	}	1108	}
666		1109
667	if (periodiccnt)	1110	if (periodiccnt)
668	{	1111	{
669	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1112	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
670	if (block > to) block = to;	1113	if (block > to) block = to;
671	}	1114	}
672		1115
673	if (block < 0.) block = 0.;	1116	if (block < 0.) block = 0.;
674	}	1117	}
675		1118
676	method_poll (block);	1119	method_poll (EV_A_ block);
677		1120
678	/* update ev_now, do magic */	1121	/* update rt_now, do magic */
679	time_update ();	1122	time_update (EV_A);
680		1123
681	/* queue pending timers and reschedule them */	1124	/* queue pending timers and reschedule them */
682	timers_reify (); /* relative timers called last */	1125	timers_reify (EV_A); /* relative timers called last */
683	periodics_reify (); /* absolute timers called first */	1126	periodics_reify (EV_A); /* absolute timers called first */
684		1127
685	/* queue idle watchers unless io or timers are pending */	1128	/* queue idle watchers unless io or timers are pending */
686	if (!pendingcnt)	1129	if (!pendingcnt)
687	queue_events ((W *)idles, idlecnt, EV_IDLE);	1130	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688		1131
689	/* queue check watchers, to be executed first */	1132	/* queue check watchers, to be executed first */
690	if (checkcnt)	1133	if (checkcnt)
691	queue_events ((W *)checks, checkcnt, EV_CHECK);	1134	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692		1135
693	call_pending ();	1136	call_pending (EV_A);
694	}	1137	}
695	while (!ev_loop_done);	1138	while (activecnt && !loop_done);
696		1139
697	if (ev_loop_done != 2)	1140	if (loop_done != 2)
698	ev_loop_done = 0;	1141	loop_done = 0;
		1142	}
		1143
		1144	void
		1145	ev_unloop (EV_P_ int how)
		1146	{
		1147	loop_done = how;
699	}	1148	}
700		1149
701	/*****************************************************************************/	1150	/*****************************************************************************/
702		1151
703	static void	1152	inline void
704	wlist_add (WL *head, WL elem)	1153	wlist_add (WL *head, WL elem)
705	{	1154	{
706	elem->next = *head;	1155	elem->next = *head;
707	*head = elem;	1156	*head = elem;
708	}	1157	}
709		1158
710	static void	1159	inline void
711	wlist_del (WL *head, WL elem)	1160	wlist_del (WL *head, WL elem)
712	{	1161	{
713	while (*head)	1162	while (*head)
714	{	1163	{
715	if (*head == elem)	1164	if (*head == elem)
…		…
720		1169
721	head = &(*head)->next;	1170	head = &(*head)->next;
722	}	1171	}
723	}	1172	}
724		1173
725	static void	1174	inline void
726	ev_clear (W w)	1175	ev_clear_pending (EV_P_ W w)
727	{	1176	{
728	if (w->pending)	1177	if (w->pending)
729	{	1178	{
730	pendings [w->pending - 1].w = 0;	1179	pendings [ABSPRI (w)][w->pending - 1].w = 0;
731	w->pending = 0;	1180	w->pending = 0;
732	}	1181	}
733	}	1182	}
734		1183
735	static void	1184	inline void
736	ev_start (W w, int active)	1185	ev_start (EV_P_ W w, int active)
737	{	1186	{
		1187	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1188	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1189
738	w->active = active;	1190	w->active = active;
		1191	ev_ref (EV_A);
739	}	1192	}
740		1193
741	static void	1194	inline void
742	ev_stop (W w)	1195	ev_stop (EV_P_ W w)
743	{	1196	{
		1197	ev_unref (EV_A);
744	w->active = 0;	1198	w->active = 0;
745	}	1199	}
746		1200
747	/*****************************************************************************/	1201	/*****************************************************************************/
748		1202
749	void	1203	void
750	ev_io_start (struct ev_io *w)	1204	ev_io_start (EV_P_ struct ev_io *w)
751	{	1205	{
		1206	int fd = w->fd;
		1207
752	if (ev_is_active (w))	1208	if (ev_is_active (w))
753	return;	1209	return;
754		1210
755	int fd = w->fd;	1211	assert (("ev_io_start called with negative fd", fd >= 0));
756		1212
757	ev_start ((W)w, 1);	1213	ev_start (EV_A_ (W)w, 1);
758	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1214	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
759	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1215	wlist_add ((WL *)&anfds[fd].head, (WL)w);
760		1216
761	fd_change (fd);	1217	fd_change (EV_A_ fd);
762	}	1218	}
763		1219
764	void	1220	void
765	ev_io_stop (struct ev_io *w)	1221	ev_io_stop (EV_P_ struct ev_io *w)
766	{	1222	{
767	ev_clear ((W)w);	1223	ev_clear_pending (EV_A_ (W)w);
768	if (!ev_is_active (w))	1224	if (!ev_is_active (w))
769	return;	1225	return;
770		1226
771	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1227	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772	ev_stop ((W)w);	1228	ev_stop (EV_A_ (W)w);
773		1229
774	fd_change (w->fd);	1230	fd_change (EV_A_ w->fd);
775	}	1231	}
776		1232
777	void	1233	void
778	ev_timer_start (struct ev_timer *w)	1234	ev_timer_start (EV_P_ struct ev_timer *w)
779	{	1235	{
780	if (ev_is_active (w))	1236	if (ev_is_active (w))
781	return;	1237	return;
782		1238
783	w->at += now;	1239	((WT)w)->at += mn_now;
784		1240
785	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1241	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
786		1242
787	ev_start ((W)w, ++timercnt);	1243	ev_start (EV_A_ (W)w, ++timercnt);
788	array_needsize (timers, timermax, timercnt, );	1244	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
789	timers [timercnt - 1] = w;	1245	timers [timercnt - 1] = w;
790	upheap ((WT *)timers, timercnt - 1);	1246	upheap ((WT *)timers, timercnt - 1);
791	}
792		1247
		1248	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1249	}
		1250
793	void	1251	void
794	ev_timer_stop (struct ev_timer *w)	1252	ev_timer_stop (EV_P_ struct ev_timer *w)
795	{	1253	{
796	ev_clear ((W)w);	1254	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1255	if (!ev_is_active (w))
798	return;	1256	return;
799		1257
		1258	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1259
800	if (w->active < timercnt--)	1260	if (((W)w)->active < timercnt--)
801	{	1261	{
802	timers [w->active - 1] = timers [timercnt];	1262	timers [((W)w)->active - 1] = timers [timercnt];
803	downheap ((WT *)timers, timercnt, w->active - 1);	1263	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
804	}	1264	}
805		1265
806	w->at = w->repeat;	1266	((WT)w)->at = w->repeat;
807		1267
808	ev_stop ((W)w);	1268	ev_stop (EV_A_ (W)w);
809	}	1269	}
810		1270
811	void	1271	void
812	ev_timer_again (struct ev_timer *w)	1272	ev_timer_again (EV_P_ struct ev_timer *w)
813	{	1273	{
814	if (ev_is_active (w))	1274	if (ev_is_active (w))
815	{	1275	{
816	if (w->repeat)	1276	if (w->repeat)
817	{	1277	{
818	w->at = now + w->repeat;	1278	((WT)w)->at = mn_now + w->repeat;
819	downheap ((WT *)timers, timercnt, w->active - 1);	1279	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1280	}
821	else	1281	else
822	ev_timer_stop (w);	1282	ev_timer_stop (EV_A_ w);
823	}	1283	}
824	else if (w->repeat)	1284	else if (w->repeat)
825	ev_timer_start (w);	1285	ev_timer_start (EV_A_ w);
826	}	1286	}
827		1287
828	void	1288	void
829	ev_periodic_start (struct ev_periodic *w)	1289	ev_periodic_start (EV_P_ struct ev_periodic *w)
830	{	1290	{
831	if (ev_is_active (w))	1291	if (ev_is_active (w))
832	return;	1292	return;
833		1293
834	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1294	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
835		1295
836	/* 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 */
837	if (w->interval)	1297	if (w->interval)
838	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;
839		1299
840	ev_start ((W)w, ++periodiccnt);	1300	ev_start (EV_A_ (W)w, ++periodiccnt);
841	array_needsize (periodics, periodicmax, periodiccnt, );	1301	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
842	periodics [periodiccnt - 1] = w;	1302	periodics [periodiccnt - 1] = w;
843	upheap ((WT *)periodics, periodiccnt - 1);	1303	upheap ((WT *)periodics, periodiccnt - 1);
844	}
845		1304
		1305	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1306	}
		1307
846	void	1308	void
847	ev_periodic_stop (struct ev_periodic *w)	1309	ev_periodic_stop (EV_P_ struct ev_periodic *w)
848	{	1310	{
849	ev_clear ((W)w);	1311	ev_clear_pending (EV_A_ (W)w);
850	if (!ev_is_active (w))	1312	if (!ev_is_active (w))
851	return;	1313	return;
852		1314
		1315	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1316
853	if (w->active < periodiccnt--)	1317	if (((W)w)->active < periodiccnt--)
854	{	1318	{
855	periodics [w->active - 1] = periodics [periodiccnt];	1319	periodics [((W)w)->active - 1] = periodics [periodiccnt];
856	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1320	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
857	}	1321	}
858		1322
859	ev_stop ((W)w);	1323	ev_stop (EV_A_ (W)w);
860	}	1324	}
861		1325
862	void	1326	void
863	ev_signal_start (struct ev_signal *w)	1327	ev_idle_start (EV_P_ struct ev_idle *w)
864	{	1328	{
865	if (ev_is_active (w))	1329	if (ev_is_active (w))
866	return;	1330	return;
867		1331
		1332	ev_start (EV_A_ (W)w, ++idlecnt);
		1333	array_needsize (struct ev_idle *, 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 (struct ev_prepare *, 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 (struct ev_check *, 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
		1405	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1406
868	ev_start ((W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
869	array_needsize (signals, signalmax, w->signum, signals_init);	1408	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
870	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1409	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871		1410
872	if (!w->next)	1411	if (!((WL)w)->next)
873	{	1412	{
		1413	#if WIN32
		1414	signal (w->signum, sighandler);
		1415	#else
874	struct sigaction sa;	1416	struct sigaction sa;
875	sa.sa_handler = sighandler;	1417	sa.sa_handler = sighandler;
876	sigfillset (&sa.sa_mask);	1418	sigfillset (&sa.sa_mask);
877	sa.sa_flags = 0;	1419	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878	sigaction (w->signum, &sa, 0);	1420	sigaction (w->signum, &sa, 0);
		1421	#endif
879	}	1422	}
880	}	1423	}
881		1424
882	void	1425	void
883	ev_signal_stop (struct ev_signal *w)	1426	ev_signal_stop (EV_P_ struct ev_signal *w)
884	{	1427	{
885	ev_clear ((W)w);	1428	ev_clear_pending (EV_A_ (W)w);
886	if (!ev_is_active (w))	1429	if (!ev_is_active (w))
887	return;	1430	return;
888		1431
889	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1432	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890	ev_stop ((W)w);	1433	ev_stop (EV_A_ (W)w);
891		1434
892	if (!signals [w->signum - 1].head)	1435	if (!signals [w->signum - 1].head)
893	signal (w->signum, SIG_DFL);	1436	signal (w->signum, SIG_DFL);
894	}	1437	}
895		1438
896	void	1439	void
897	ev_idle_start (struct ev_idle *w)	1440	ev_child_start (EV_P_ struct ev_child *w)
898	{	1441	{
		1442	#if EV_MULTIPLICITY
		1443	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1444	#endif
899	if (ev_is_active (w))	1445	if (ev_is_active (w))
900	return;	1446	return;
901		1447
902	ev_start ((W)w, ++idlecnt);	1448	ev_start (EV_A_ (W)w, 1);
903	array_needsize (idles, idlemax, idlecnt, );	1449	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
904	idles [idlecnt - 1] = w;
905	}	1450	}
906		1451
907	void	1452	void
908	ev_idle_stop (struct ev_idle *w)	1453	ev_child_stop (EV_P_ struct ev_child *w)
909	{	1454	{
910	ev_clear ((W)w);	1455	ev_clear_pending (EV_A_ (W)w);
911	if (ev_is_active (w))	1456	if (ev_is_active (w))
912	return;	1457	return;
913		1458
914	idles [w->active - 1] = idles [--idlecnt];
915	ev_stop ((W)w);
916	}
917
918	void
919	ev_prepare_start (struct ev_prepare *w)
920	{
921	if (ev_is_active (w))
922	return;
923
924	ev_start ((W)w, ++preparecnt);
925	array_needsize (prepares, preparemax, preparecnt, );
926	prepares [preparecnt - 1] = w;
927	}
928
929	void
930	ev_prepare_stop (struct ev_prepare *w)
931	{
932	ev_clear ((W)w);
933	if (ev_is_active (w))
934	return;
935
936	prepares [w->active - 1] = prepares [--preparecnt];
937	ev_stop ((W)w);
938	}
939
940	void
941	ev_check_start (struct ev_check *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, ++checkcnt);
947	array_needsize (checks, checkmax, checkcnt, );
948	checks [checkcnt - 1] = w;
949	}
950
951	void
952	ev_check_stop (struct ev_check *w)
953	{
954	ev_clear ((W)w);
955	if (ev_is_active (w))
956	return;
957
958	checks [w->active - 1] = checks [--checkcnt];
959	ev_stop ((W)w);
960	}
961
962	void
963	ev_child_start (struct ev_child *w)
964	{
965	if (ev_is_active (w))
966	return;
967
968	ev_start ((W)w, 1);
969	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	}
971
972	void
973	ev_child_stop (struct ev_child *w)
974	{
975	ev_clear ((W)w);
976	if (ev_is_active (w))
977	return;
978
979	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1459	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	ev_stop ((W)w);	1460	ev_stop (EV_A_ (W)w);
981	}	1461	}
982		1462
983	/*****************************************************************************/	1463	/*****************************************************************************/
984		1464
985	struct ev_once	1465	struct ev_once
…		…
989	void (*cb)(int revents, void *arg);	1469	void (*cb)(int revents, void *arg);
990	void *arg;	1470	void *arg;
991	};	1471	};
992		1472
993	static void	1473	static void
994	once_cb (struct ev_once *once, int revents)	1474	once_cb (EV_P_ struct ev_once *once, int revents)
995	{	1475	{
996	void (*cb)(int revents, void *arg) = once->cb;	1476	void (*cb)(int revents, void *arg) = once->cb;
997	void *arg = once->arg;	1477	void *arg = once->arg;
998		1478
999	ev_io_stop (&once->io);	1479	ev_io_stop (EV_A_ &once->io);
1000	ev_timer_stop (&once->to);	1480	ev_timer_stop (EV_A_ &once->to);
1001	free (once);	1481	ev_free (once);
1002		1482
1003	cb (revents, arg);	1483	cb (revents, arg);
1004	}	1484	}
1005		1485
1006	static void	1486	static void
1007	once_cb_io (struct ev_io *w, int revents)	1487	once_cb_io (EV_P_ struct ev_io *w, int revents)
1008	{	1488	{
1009	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);
1010	}	1490	}
1011		1491
1012	static void	1492	static void
1013	once_cb_to (struct ev_timer *w, int revents)	1493	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014	{	1494	{
1015	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);
1016	}	1496	}
1017		1497
1018	void	1498	void
1019	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)
1020	{	1500	{
1021	struct ev_once *once = malloc (sizeof (struct ev_once));	1501	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1022		1502
1023	if (!once)	1503	if (!once)
1024	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1504	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1025	else	1505	else
1026	{	1506	{
…		…
1029		1509
1030	ev_watcher_init (&once->io, once_cb_io);	1510	ev_watcher_init (&once->io, once_cb_io);
1031	if (fd >= 0)	1511	if (fd >= 0)
1032	{	1512	{
1033	ev_io_set (&once->io, fd, events);	1513	ev_io_set (&once->io, fd, events);
1034	ev_io_start (&once->io);	1514	ev_io_start (EV_A_ &once->io);
1035	}	1515	}
1036		1516
1037	ev_watcher_init (&once->to, once_cb_to);	1517	ev_watcher_init (&once->to, once_cb_to);
1038	if (timeout >= 0.)	1518	if (timeout >= 0.)
1039	{	1519	{
1040	ev_timer_set (&once->to, timeout, 0.);	1520	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1521	ev_timer_start (EV_A_ &once->to);
1042	}	1522	}
1043	}	1523	}
1044	}	1524	}
1045		1525
1046	/*****************************************************************************/
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif
1102
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
1128

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