[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.33 by root, Thu Nov 1 11:11:22 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 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"
31	#endif	33	#endif
32		34
33	#include <math.h>	35	#include <math.h>
34	#include <stdlib.h>	36	#include <stdlib.h>
…		…
40	#include <stdio.h>	42	#include <stdio.h>
41		43
42	#include <assert.h>	44	#include <assert.h>
43	#include <errno.h>	45	#include <errno.h>
44	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
45	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
46	#include <sys/time.h>	50	#include <sys/time.h>
47	#include <time.h>	51	#include <time.h>
48		52
		53	/**/
		54
49	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	57	#endif
54		58
55	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
57	#endif	61	#endif
58		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
59	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
61	#endif	69	#endif
62		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
63	#ifndef CLOCK_REALTIME	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	88	# define EV_USE_REALTIME 0
65	#endif	89	#endif
66	#ifndef EV_USE_REALTIME	90
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	91	/**/
68	#endif
69		92
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
74		97
75	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		113
77	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
80		117
81	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84
85	static int have_monotonic; /* runtime */
86
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		119
91	/*****************************************************************************/	120	/*****************************************************************************/
92		121
93	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#ifdef EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
94	ev_time (void)	156	ev_time (void)
95	{	157	{
96	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
97	struct timespec ts;	159	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	166	#endif
105	}	167	}
106		168
107	static ev_tstamp	169	inline ev_tstamp
108	get_clock (void)	170	get_clock (void)
109	{	171	{
110	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
111	if (have_monotonic)	173	if (expect_true (have_monotonic))
112	{	174	{
113	struct timespec ts;	175	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	178	}
117	#endif	179	#endif
118		180
119	return ev_time ();	181	return ev_time ();
120	}	182	}
121		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
123		191
124	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
126	{ \	194	{ \
127	int newcnt = cur; \	195	int newcnt = cur; \
128	do \	196	do \
129	{ \	197	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	204	cur = newcnt; \
137	}	205	}
138		206
139	/*****************************************************************************/	207	/*****************************************************************************/
140		208
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150
151	static void	209	static void
152	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
153	{	211	{
154	while (count--)	212	while (count--)
155	{	213	{
…		…
159		217
160	++base;	218	++base;
161	}	219	}
162	}	220	}
163		221
164	typedef struct
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void	222	static void
174	event (W w, int events)	223	event (EV_P_ W w, int events)
175	{	224	{
176	if (w->pending)	225	if (w->pending)
177	{	226	{
178	pendings [w->pending - 1].events \|= events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
179	return;	228	return;
180	}	229	}
181		230
182	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
184	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	235	}
187		236
188	static void	237	static void
189	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	239	{
191	int i;	240	int i;
192		241
193	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	243	event (EV_A_ events [i], type);
195	}	244	}
196		245
197	static void	246	static void
198	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
199	{	248	{
200	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	250	struct ev_io *w;
202		251
203	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
204	{	253	{
205	int ev = w->events & events;	254	int ev = w->events & events;
206		255
207	if (ev)	256	if (ev)
208	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
209	}	258	}
210	}	259	}
211		260
212	/*****************************************************************************/	261	/*****************************************************************************/
213		262
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	263	static void
218	fd_reify (void)	264	fd_reify (EV_P)
219	{	265	{
220	int i;	266	int i;
221		267
222	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
223	{	269	{
…		…
225	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	272	struct ev_io *w;
227		273
228	int events = 0;	274	int events = 0;
229		275
230	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
231	events \|= w->events;	277	events \|= w->events;
232		278
233	anfd->reify = 0;	279	anfd->reify = 0;
234		280
235	if (anfd->events != events)	281	if (anfd->events != events)
236	{	282	{
237	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	284	anfd->events = events;
239	}	285	}
240	}	286	}
241		287
242	fdchangecnt = 0;	288	fdchangecnt = 0;
243	}	289	}
244		290
245	static void	291	static void
246	fd_change (int fd)	292	fd_change (EV_P_ int fd)
247	{	293	{
248	if (anfds [fd].reify \|\| fdchangecnt < 0)	294	if (anfds [fd].reify \|\| fdchangecnt < 0)
249	return;	295	return;
250		296
251	anfds [fd].reify = 1;	297	anfds [fd].reify = 1;
…		…
253	++fdchangecnt;	299	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
255	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
256	}	302	}
257		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
		314	}
		315
258	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
259	static void	317	static void
260	fd_recheck (void)	318	fd_ebadf (EV_P)
261	{	319	{
262	int fd;	320	int fd;
263		321
264	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	323	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
267	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
268	{	336	{
269	ev_io_stop (anfds [fd].head);	337	close (fd);
270	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	338	fd_kill (EV_A_ fd);
		339	return;
271	}	340	}
272	}	341	}
273		342
274	/*****************************************************************************/	343	/*****************************************************************************/
275		344
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	345	static void
283	upheap (WT *timers, int k)	346	upheap (WT *heap, int k)
284	{	347	{
285	WT w = timers [k];	348	WT w = heap [k];
286		349
287	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
288	{	351	{
289	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
291	k >>= 1;	354	k >>= 1;
292	}	355	}
293		356
294	timers [k] = w;	357	heap [k] = w;
295	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
296		359
297	}	360	}
298		361
299	static void	362	static void
300	downheap (WT *timers, int N, int k)	363	downheap (WT *heap, int N, int k)
301	{	364	{
302	WT w = timers [k];	365	WT w = heap [k];
303		366
304	while (k < (N >> 1))	367	while (k < (N >> 1))
305	{	368	{
306	int j = k << 1;	369	int j = k << 1;
307		370
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	372	++j;
310		373
311	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
312	break;	375	break;
313		376
314	timers [k] = timers [j];	377	heap [k] = heap [j];
315	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
316	k = j;	379	k = j;
317	}	380	}
318		381
319	timers [k] = w;	382	heap [k] = w;
320	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
321	}	384	}
322		385
323	/*****************************************************************************/	386	/*****************************************************************************/
324		387
325	typedef struct	388	typedef struct
326	{	389	{
327	struct ev_signal *head;	390	struct ev_watcher_list *head;
328	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
329	} ANSIG;	392	} ANSIG;
330		393
331	static ANSIG *signals;	394	static ANSIG *signals;
332	static int signalmax;	395	static int signalmax;
333		396
334	static int sigpipe [2];	397	static int sigpipe [2];
335	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
336	static struct ev_io sigev;
337		399
338	static void	400	static void
339	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
340	{	402	{
341	while (count--)	403	while (count--)
…		…
352	{	414	{
353	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
354		416
355	if (!gotsig)	417	if (!gotsig)
356	{	418	{
		419	int old_errno = errno;
357	gotsig = 1;	420	gotsig = 1;
358	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
359	}	423	}
360	}	424	}
361		425
362	static void	426	static void
363	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	428	{
365	struct ev_signal *w;	429	struct ev_watcher_list *w;
366	int sig;	430	int signum;
367		431
		432	read (sigpipe [0], &revents, 1);
368	gotsig = 0;	433	gotsig = 0;
369	read (sigpipe [0], &revents, 1);
370		434
371	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
373	{	437	{
374	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
375		439
376	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
378	}	442	}
379	}	443	}
380		444
381	static void	445	static void
382	siginit (void)	446	siginit (EV_P)
383	{	447	{
		448	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		451
387	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
390		456
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	460	}
394		461
395	/*****************************************************************************/	462	/*****************************************************************************/
396		463
397	static struct ev_idle **idles;	464	#ifndef WIN32
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;
410		465
411	#ifndef WCONTINUED	466	#ifndef WCONTINUED
412	# define WCONTINUED 0	467	# define WCONTINUED 0
413	#endif	468	#endif
414		469
415	static void	470	static void
416	childcb (struct ev_signal *sw, int revents)	471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	472	{
418	struct ev_child *w;	473	struct ev_child *w;
		474
		475	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		476	if (w->pid == pid \|\| !w->pid)
		477	{
		478	w->priority = sw->priority; /* need to do it now */
		479	w->rpid = pid;
		480	w->rstatus = status;
		481	event (EV_A_ (W)w, EV_CHILD);
		482	}
		483	}
		484
		485	static void
		486	childcb (EV_P_ struct ev_signal *sw, int revents)
		487	{
419	int pid, status;	488	int pid, status;
420		489
421	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	490	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	491	{
423	if (w->pid == pid \|\| w->pid == -1)	492	/* make sure we are called again until all childs have been reaped */
424	{	493	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	494
426	event ((W)w, EV_CHILD);	495	child_reap (EV_A_ sw, pid, pid, status);
427	}	496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
428	}	498	}
		499
		500	#endif
429		501
430	/*****************************************************************************/	502	/*****************************************************************************/
431		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
432	#if EV_USE_EPOLL	507	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	508	# include "ev_epoll.c"
434	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
435	#if EV_USE_SELECT	513	#if EV_USE_SELECT
436	# include "ev_select.c"	514	# include "ev_select.c"
437	#endif	515	#endif
438		516
439	int	517	int
…		…
446	ev_version_minor (void)	524	ev_version_minor (void)
447	{	525	{
448	return EV_VERSION_MINOR;	526	return EV_VERSION_MINOR;
449	}	527	}
450		528
451	int ev_init (int flags)	529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
452	{	532	{
		533	#ifdef WIN32
		534	return 0;
		535	#else
		536	return getuid () != geteuid ()
		537	\|\| getgid () != getegid ();
		538	#endif
		539	}
		540
		541	int
		542	ev_method (EV_P)
		543	{
		544	return method;
		545	}
		546
		547	static void
		548	loop_init (EV_P_ int methods)
		549	{
453	if (!ev_method)	550	if (!method)
454	{	551	{
455	#if EV_USE_MONOTONIC	552	#if EV_USE_MONOTONIC
456	{	553	{
457	struct timespec ts;	554	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	556	have_monotonic = 1;
460	}	557	}
461	#endif	558	#endif
462		559
463	ev_now = ev_time ();	560	rt_now = ev_time ();
464	now = get_clock ();	561	mn_now = get_clock ();
		562	now_floor = mn_now;
465	diff = ev_now - now;	563	rtmn_diff = rt_now - mn_now;
466		564
467	if (pipe (sigpipe))	565	if (pipe (sigpipe))
468	return 0;	566	return 0;
469		567
		568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
470	ev_method = EVMETHOD_NONE;	572	methods = EVMETHOD_ANY;
		573
		574	method = 0;
		575	#if EV_USE_KQUEUE
		576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		577	#endif
471	#if EV_USE_EPOLL	578	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
473	#endif	583	#endif
474	#if EV_USE_SELECT	584	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	586	#endif
477		587
478	if (ev_method)	588	if (method)
479	{	589	{
480	ev_watcher_init (&sigev, sigcb);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
481	siginit ();	592	siginit (EV_A);
482		593
		594	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	597	ev_signal_start (EV_A_ &childev);
		598	ev_unref (EV_A); /* child watcher should not keep loop alive */
		599	#endif
485	}	600	}
486	}	601	}
487		602
488	return ev_method;	603	return method;
489	}	604	}
		605
		606	#ifdef EV_MULTIPLICITY
		607
		608	struct ev_loop *
		609	ev_loop_new (int methods)
		610	{
		611	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		612
		613	loop_init (EV_A_ methods);
		614
		615	return loop;
		616	}
		617
		618	void
		619	ev_loop_delete (EV_P)
		620	{
		621	/TODO/
		622	free (loop);
		623	}
		624
		625	#else
		626
		627	int
		628	ev_init (int methods)
		629	{
		630	loop_init ();
		631	}
		632
		633	#endif
490		634
491	/*****************************************************************************/	635	/*****************************************************************************/
492		636
493	void	637	void
494	ev_prefork (void)	638	ev_fork_prepare (void)
495	{	639	{
496	/* nop */	640	/* nop */
497	}	641	}
498		642
499	void	643	void
500	ev_postfork_parent (void)	644	ev_fork_parent (void)
501	{	645	{
502	/* nop */	646	/* nop */
503	}	647	}
504		648
505	void	649	void
506	ev_postfork_child (void)	650	ev_fork_child (void)
507	{	651	{
		652	/TODO/
		653	#if !EV_MULTIPLICITY
508	#if EV_USE_EPOLL	654	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)	655	if (method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();	656	epoll_postfork_child (EV_A);
511	#endif	657	#endif
512		658
513	ev_io_stop (&sigev);	659	ev_io_stop (EV_A_ &sigev);
514	close (sigpipe [0]);	660	close (sigpipe [0]);
515	close (sigpipe [1]);	661	close (sigpipe [1]);
516	pipe (sigpipe);	662	pipe (sigpipe);
517	siginit ();	663	siginit (EV_A);
		664	#endif
518	}	665	}
519		666
520	/*****************************************************************************/	667	/*****************************************************************************/
521		668
522	static void	669	static void
523	call_pending (void)	670	call_pending (EV_P)
524	{	671	{
		672	int pri;
		673
		674	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	675	while (pendingcnt [pri])
526	{	676	{
527	ANPENDING *p = pendings + --pendingcnt;	677	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		678
529	if (p->w)	679	if (p->w)
530	{	680	{
531	p->w->pending = 0;	681	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	682	p->w->cb (EV_A_ p->w, p->events);
533	}	683	}
534	}	684	}
535	}	685	}
536		686
537	static void	687	static void
538	timers_reify (void)	688	timers_reify (EV_P)
539	{	689	{
540	while (timercnt && timers [0]->at <= now)	690	while (timercnt && timers [0]->at <= mn_now)
541	{	691	{
542	struct ev_timer *w = timers [0];	692	struct ev_timer *w = timers [0];
543		693
544	/* first reschedule or stop timer */	694	/* first reschedule or stop timer */
545	if (w->repeat)	695	if (w->repeat)
546	{	696	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	697	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	698	w->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	699	downheap ((WT *)timers, timercnt, 0);
550	}	700	}
551	else	701	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	702	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		703
554	event ((W)w, EV_TIMEOUT);	704	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	705	}
556	}	706	}
557		707
558	static void	708	static void
559	periodics_reify (void)	709	periodics_reify (EV_P)
560	{	710	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	711	while (periodiccnt && periodics [0]->at <= rt_now)
562	{	712	{
563	struct ev_periodic *w = periodics [0];	713	struct ev_periodic *w = periodics [0];
564		714
565	/* first reschedule or stop timer */	715	/* first reschedule or stop timer */
566	if (w->interval)	716	if (w->interval)
567	{	717	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	718	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	719	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	720	downheap ((WT *)periodics, periodiccnt, 0);
571	}	721	}
572	else	722	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	723	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		724
575	event ((W)w, EV_PERIODIC);	725	event (EV_A_ (W)w, EV_PERIODIC);
576	}	726	}
577	}	727	}
578		728
579	static void	729	static void
580	periodics_reschedule (ev_tstamp diff)	730	periodics_reschedule (EV_P)
581	{	731	{
582	int i;	732	int i;
583		733
584	/* adjust periodics after time jump */	734	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	735	for (i = 0; i < periodiccnt; ++i)
586	{	736	{
587	struct ev_periodic *w = periodics [i];	737	struct ev_periodic *w = periodics [i];
588		738
589	if (w->interval)	739	if (w->interval)
590	{	740	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	741	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
592		742
593	if (fabs (diff) >= 1e-4)	743	if (fabs (diff) >= 1e-4)
594	{	744	{
595	ev_periodic_stop (w);	745	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	746	ev_periodic_start (EV_A_ w);
597		747
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	748	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	749	}
600	}	750	}
601	}	751	}
602	}	752	}
603		753
		754	inline int
		755	time_update_monotonic (EV_P)
		756	{
		757	mn_now = get_clock ();
		758
		759	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		760	{
		761	rt_now = rtmn_diff + mn_now;
		762	return 0;
		763	}
		764	else
		765	{
		766	now_floor = mn_now;
		767	rt_now = ev_time ();
		768	return 1;
		769	}
		770	}
		771
604	static void	772	static void
605	time_update (void)	773	time_update (EV_P)
606	{	774	{
607	int i;	775	int i;
608		776
609	ev_now = ev_time ();	777	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	778	if (expect_true (have_monotonic))
612	{	779	{
613	ev_tstamp odiff = diff;	780	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	781	{
617	now = get_clock ();	782	ev_tstamp odiff = rtmn_diff;
		783
		784	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		785	{
618	diff = ev_now - now;	786	rtmn_diff = rt_now - mn_now;
619		787
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	788	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	789	return; /* all is well */
622		790
623	ev_now = ev_time ();	791	rt_now = ev_time ();
		792	mn_now = get_clock ();
		793	now_floor = mn_now;
		794	}
		795
		796	periodics_reschedule (EV_A);
		797	/* no timer adjustment, as the monotonic clock doesn't jump */
		798	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
624	}	799	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	800	}
629	else	801	else
		802	#endif
630	{	803	{
631	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	804	rt_now = ev_time ();
		805
		806	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
632	{	807	{
633	periodics_reschedule (ev_now - now);	808	periodics_reschedule (EV_A);
634		809
635	/* adjust timers. this is easy, as the offset is the same for all */	810	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	811	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	812	timers [i]->at += rt_now - mn_now;
638	}	813	}
639		814
640	now = ev_now;	815	mn_now = rt_now;
641	}	816	}
642	}	817	}
643		818
644	int ev_loop_done;	819	void
		820	ev_ref (EV_P)
		821	{
		822	++activecnt;
		823	}
645		824
		825	void
		826	ev_unref (EV_P)
		827	{
		828	--activecnt;
		829	}
		830
		831	static int loop_done;
		832
		833	void
646	void ev_loop (int flags)	834	ev_loop (EV_P_ int flags)
647	{	835	{
648	double block;	836	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	837	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
650		838
651	do	839	do
652	{	840	{
653	/* queue check watchers (and execute them) */	841	/* queue check watchers (and execute them) */
654	if (preparecnt)	842	if (expect_false (preparecnt))
655	{	843	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	844	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	845	call_pending (EV_A);
658	}	846	}
659		847
660	/* update fd-related kernel structures */	848	/* update fd-related kernel structures */
661	fd_reify ();	849	fd_reify (EV_A);
662		850
663	/* calculate blocking time */	851	/* calculate blocking time */
664		852
665	/* we only need this for !monotonic clockor timers, but as we basically	853	/* we only need this for !monotonic clockor timers, but as we basically
666	always have timers, we just calculate it always */	854	always have timers, we just calculate it always */
		855	#if EV_USE_MONOTONIC
		856	if (expect_true (have_monotonic))
		857	time_update_monotonic (EV_A);
		858	else
		859	#endif
		860	{
667	ev_now = ev_time ();	861	rt_now = ev_time ();
		862	mn_now = rt_now;
		863	}
668		864
669	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	865	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
670	block = 0.;	866	block = 0.;
671	else	867	else
672	{	868	{
673	block = MAX_BLOCKTIME;	869	block = MAX_BLOCKTIME;
674		870
675	if (timercnt)	871	if (timercnt)
676	{	872	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	873	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
678	if (block > to) block = to;	874	if (block > to) block = to;
679	}	875	}
680		876
681	if (periodiccnt)	877	if (periodiccnt)
682	{	878	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	879	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
684	if (block > to) block = to;	880	if (block > to) block = to;
685	}	881	}
686		882
687	if (block < 0.) block = 0.;	883	if (block < 0.) block = 0.;
688	}	884	}
689		885
690	method_poll (block);	886	method_poll (EV_A_ block);
691		887
692	/* update ev_now, do magic */	888	/* update rt_now, do magic */
693	time_update ();	889	time_update (EV_A);
694		890
695	/* queue pending timers and reschedule them */	891	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	892	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	893	periodics_reify (EV_A); /* absolute timers called first */
698		894
699	/* queue idle watchers unless io or timers are pending */	895	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	896	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	897	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		898
703	/* queue check watchers, to be executed first */	899	/* queue check watchers, to be executed first */
704	if (checkcnt)	900	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	901	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		902
707	call_pending ();	903	call_pending (EV_A);
708	}	904	}
709	while (!ev_loop_done);	905	while (activecnt && !loop_done);
710		906
711	if (ev_loop_done != 2)	907	if (loop_done != 2)
712	ev_loop_done = 0;	908	loop_done = 0;
		909	}
		910
		911	void
		912	ev_unloop (EV_P_ int how)
		913	{
		914	loop_done = how;
713	}	915	}
714		916
715	/*****************************************************************************/	917	/*****************************************************************************/
716		918
717	static void	919	inline void
718	wlist_add (WL *head, WL elem)	920	wlist_add (WL *head, WL elem)
719	{	921	{
720	elem->next = *head;	922	elem->next = *head;
721	*head = elem;	923	*head = elem;
722	}	924	}
723		925
724	static void	926	inline void
725	wlist_del (WL *head, WL elem)	927	wlist_del (WL *head, WL elem)
726	{	928	{
727	while (*head)	929	while (*head)
728	{	930	{
729	if (*head == elem)	931	if (*head == elem)
…		…
734		936
735	head = &(*head)->next;	937	head = &(*head)->next;
736	}	938	}
737	}	939	}
738		940
739	static void	941	inline void
740	ev_clear_pending (W w)	942	ev_clear_pending (EV_P_ W w)
741	{	943	{
742	if (w->pending)	944	if (w->pending)
743	{	945	{
744	pendings [w->pending - 1].w = 0;	946	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	947	w->pending = 0;
746	}	948	}
747	}	949	}
748		950
749	static void	951	inline void
750	ev_start (W w, int active)	952	ev_start (EV_P_ W w, int active)
751	{	953	{
		954	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		955	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		956
752	w->active = active;	957	w->active = active;
		958	ev_ref (EV_A);
753	}	959	}
754		960
755	static void	961	inline void
756	ev_stop (W w)	962	ev_stop (EV_P_ W w)
757	{	963	{
		964	ev_unref (EV_A);
758	w->active = 0;	965	w->active = 0;
759	}	966	}
760		967
761	/*****************************************************************************/	968	/*****************************************************************************/
762		969
763	void	970	void
764	ev_io_start (struct ev_io *w)	971	ev_io_start (EV_P_ struct ev_io *w)
765	{	972	{
		973	int fd = w->fd;
		974
766	if (ev_is_active (w))	975	if (ev_is_active (w))
767	return;	976	return;
768		977
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	978	assert (("ev_io_start called with negative fd", fd >= 0));
772		979
773	ev_start ((W)w, 1);	980	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	981	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	982	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		983
777	fd_change (fd);	984	fd_change (EV_A_ fd);
778	}	985	}
779		986
780	void	987	void
781	ev_io_stop (struct ev_io *w)	988	ev_io_stop (EV_P_ struct ev_io *w)
782	{	989	{
783	ev_clear_pending ((W)w);	990	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	991	if (!ev_is_active (w))
785	return;	992	return;
786		993
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	994	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	995	ev_stop (EV_A_ (W)w);
789		996
790	fd_change (w->fd);	997	fd_change (EV_A_ w->fd);
791	}	998	}
792		999
793	void	1000	void
794	ev_timer_start (struct ev_timer *w)	1001	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1002	{
796	if (ev_is_active (w))	1003	if (ev_is_active (w))
797	return;	1004	return;
798		1005
799	w->at += now;	1006	w->at += mn_now;
800		1007
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1008	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1009
803	ev_start ((W)w, ++timercnt);	1010	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1011	array_needsize (timers, timermax, timercnt, );
805	timers [timercnt - 1] = w;	1012	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1013	upheap ((WT *)timers, timercnt - 1);
807	}	1014	}
808		1015
809	void	1016	void
810	ev_timer_stop (struct ev_timer *w)	1017	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1018	{
812	ev_clear_pending ((W)w);	1019	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1020	if (!ev_is_active (w))
814	return;	1021	return;
815		1022
816	if (w->active < timercnt--)	1023	if (w->active < timercnt--)
817	{	1024	{
…		…
819	downheap ((WT *)timers, timercnt, w->active - 1);	1026	downheap ((WT *)timers, timercnt, w->active - 1);
820	}	1027	}
821		1028
822	w->at = w->repeat;	1029	w->at = w->repeat;
823		1030
824	ev_stop ((W)w);	1031	ev_stop (EV_A_ (W)w);
825	}	1032	}
826		1033
827	void	1034	void
828	ev_timer_again (struct ev_timer *w)	1035	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1036	{
830	if (ev_is_active (w))	1037	if (ev_is_active (w))
831	{	1038	{
832	if (w->repeat)	1039	if (w->repeat)
833	{	1040	{
834	w->at = now + w->repeat;	1041	w->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1042	downheap ((WT *)timers, timercnt, w->active - 1);
836	}	1043	}
837	else	1044	else
838	ev_timer_stop (w);	1045	ev_timer_stop (EV_A_ w);
839	}	1046	}
840	else if (w->repeat)	1047	else if (w->repeat)
841	ev_timer_start (w);	1048	ev_timer_start (EV_A_ w);
842	}	1049	}
843		1050
844	void	1051	void
845	ev_periodic_start (struct ev_periodic *w)	1052	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1053	{
847	if (ev_is_active (w))	1054	if (ev_is_active (w))
848	return;	1055	return;
849		1056
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1057	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1058
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1059	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)	1060	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1061	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
855		1062
856	ev_start ((W)w, ++periodiccnt);	1063	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1064	array_needsize (periodics, periodicmax, periodiccnt, );
858	periodics [periodiccnt - 1] = w;	1065	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1066	upheap ((WT *)periodics, periodiccnt - 1);
860	}	1067	}
861		1068
862	void	1069	void
863	ev_periodic_stop (struct ev_periodic *w)	1070	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1071	{
865	ev_clear_pending ((W)w);	1072	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1073	if (!ev_is_active (w))
867	return;	1074	return;
868		1075
869	if (w->active < periodiccnt--)	1076	if (w->active < periodiccnt--)
870	{	1077	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1078	periodics [w->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1079	downheap ((WT *)periodics, periodiccnt, w->active - 1);
873	}	1080	}
874		1081
875	ev_stop ((W)w);	1082	ev_stop (EV_A_ (W)w);
876	}	1083	}
877		1084
		1085	#ifndef SA_RESTART
		1086	# define SA_RESTART 0
		1087	#endif
		1088
878	void	1089	void
879	ev_signal_start (struct ev_signal *w)	1090	ev_signal_start (EV_P_ struct ev_signal *w)
880	{	1091	{
881	if (ev_is_active (w))	1092	if (ev_is_active (w))
882	return;	1093	return;
883		1094
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1095	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1096
886	ev_start ((W)w, 1);	1097	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1098	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1099	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1100
890	if (!w->next)	1101	if (!w->next)
891	{	1102	{
892	struct sigaction sa;	1103	struct sigaction sa;
893	sa.sa_handler = sighandler;	1104	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1105	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1106	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1107	sigaction (w->signum, &sa, 0);
897	}	1108	}
898	}	1109	}
899		1110
900	void	1111	void
901	ev_signal_stop (struct ev_signal *w)	1112	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1113	{
903	ev_clear_pending ((W)w);	1114	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
905	return;	1116	return;
906		1117
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1118	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1119	ev_stop (EV_A_ (W)w);
909		1120
910	if (!signals [w->signum - 1].head)	1121	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1122	signal (w->signum, SIG_DFL);
912	}	1123	}
913		1124
914	void	1125	void
915	ev_idle_start (struct ev_idle *w)	1126	ev_idle_start (EV_P_ struct ev_idle *w)
916	{	1127	{
917	if (ev_is_active (w))	1128	if (ev_is_active (w))
918	return;	1129	return;
919		1130
920	ev_start ((W)w, ++idlecnt);	1131	ev_start (EV_A_ (W)w, ++idlecnt);
921	array_needsize (idles, idlemax, idlecnt, );	1132	array_needsize (idles, idlemax, idlecnt, );
922	idles [idlecnt - 1] = w;	1133	idles [idlecnt - 1] = w;
923	}	1134	}
924		1135
925	void	1136	void
926	ev_idle_stop (struct ev_idle *w)	1137	ev_idle_stop (EV_P_ struct ev_idle *w)
927	{	1138	{
928	ev_clear_pending ((W)w);	1139	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1140	if (ev_is_active (w))
930	return;	1141	return;
931		1142
932	idles [w->active - 1] = idles [--idlecnt];	1143	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);	1144	ev_stop (EV_A_ (W)w);
934	}	1145	}
935		1146
936	void	1147	void
937	ev_prepare_start (struct ev_prepare *w)	1148	ev_prepare_start (EV_P_ struct ev_prepare *w)
938	{	1149	{
939	if (ev_is_active (w))	1150	if (ev_is_active (w))
940	return;	1151	return;
941		1152
942	ev_start ((W)w, ++preparecnt);	1153	ev_start (EV_A_ (W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );	1154	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;	1155	prepares [preparecnt - 1] = w;
945	}	1156	}
946		1157
947	void	1158	void
948	ev_prepare_stop (struct ev_prepare *w)	1159	ev_prepare_stop (EV_P_ struct ev_prepare *w)
949	{	1160	{
950	ev_clear_pending ((W)w);	1161	ev_clear_pending (EV_A_ (W)w);
951	if (ev_is_active (w))	1162	if (ev_is_active (w))
952	return;	1163	return;
953		1164
954	prepares [w->active - 1] = prepares [--preparecnt];	1165	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);	1166	ev_stop (EV_A_ (W)w);
956	}	1167	}
957		1168
958	void	1169	void
959	ev_check_start (struct ev_check *w)	1170	ev_check_start (EV_P_ struct ev_check *w)
960	{	1171	{
961	if (ev_is_active (w))	1172	if (ev_is_active (w))
962	return;	1173	return;
963		1174
964	ev_start ((W)w, ++checkcnt);	1175	ev_start (EV_A_ (W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );	1176	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;	1177	checks [checkcnt - 1] = w;
967	}	1178	}
968		1179
969	void	1180	void
970	ev_check_stop (struct ev_check *w)	1181	ev_check_stop (EV_P_ struct ev_check *w)
971	{	1182	{
972	ev_clear_pending ((W)w);	1183	ev_clear_pending (EV_A_ (W)w);
973	if (ev_is_active (w))	1184	if (ev_is_active (w))
974	return;	1185	return;
975		1186
976	checks [w->active - 1] = checks [--checkcnt];	1187	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
978	}	1189	}
979		1190
980	void	1191	void
981	ev_child_start (struct ev_child *w)	1192	ev_child_start (EV_P_ struct ev_child *w)
982	{	1193	{
983	if (ev_is_active (w))	1194	if (ev_is_active (w))
984	return;	1195	return;
985		1196
986	ev_start ((W)w, 1);	1197	ev_start (EV_A_ (W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1198	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}	1199	}
989		1200
990	void	1201	void
991	ev_child_stop (struct ev_child *w)	1202	ev_child_stop (EV_P_ struct ev_child *w)
992	{	1203	{
993	ev_clear_pending ((W)w);	1204	ev_clear_pending (EV_A_ (W)w);
994	if (ev_is_active (w))	1205	if (ev_is_active (w))
995	return;	1206	return;
996		1207
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1208	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1209	ev_stop (EV_A_ (W)w);
999	}	1210	}
1000		1211
1001	/*****************************************************************************/	1212	/*****************************************************************************/
1002		1213
1003	struct ev_once	1214	struct ev_once
…		…
1007	void (cb)(int revents, void arg);	1218	void (cb)(int revents, void arg);
1008	void *arg;	1219	void *arg;
1009	};	1220	};
1010		1221
1011	static void	1222	static void
1012	once_cb (struct ev_once *once, int revents)	1223	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1224	{
1014	void (cb)(int revents, void arg) = once->cb;	1225	void (cb)(int revents, void arg) = once->cb;
1015	void *arg = once->arg;	1226	void *arg = once->arg;
1016		1227
1017	ev_io_stop (&once->io);	1228	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1229	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1230	free (once);
1020		1231
1021	cb (revents, arg);	1232	cb (revents, arg);
1022	}	1233	}
1023		1234
1024	static void	1235	static void
1025	once_cb_io (struct ev_io *w, int revents)	1236	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1237	{
1027	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1238	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1028	}	1239	}
1029		1240
1030	static void	1241	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1242	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1243	{
1033	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1244	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1034	}	1245	}
1035		1246
1036	void	1247	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1248	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1038	{	1249	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1250	struct ev_once *once = malloc (sizeof (struct ev_once));
1040		1251
1041	if (!once)	1252	if (!once)
1042	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1253	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1047		1258
1048	ev_watcher_init (&once->io, once_cb_io);	1259	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1260	if (fd >= 0)
1050	{	1261	{
1051	ev_io_set (&once->io, fd, events);	1262	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1263	ev_io_start (EV_A_ &once->io);
1053	}	1264	}
1054		1265
1055	ev_watcher_init (&once->to, once_cb_to);	1266	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1267	if (timeout >= 0.)
1057	{	1268	{
1058	ev_timer_set (&once->to, timeout, 0.);	1269	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1270	ev_timer_start (EV_A_ &once->to);
1060	}	1271	}
1061	}	1272	}
1062	}	1273	}
1063		1274
1064	/*****************************************************************************/	1275	/*****************************************************************************/

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Comparing libev/ev.c (file contents): Revision 1.33 by root, Thu Nov 1 11:11:22 2007 UTC vs. Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.33 by root, Thu Nov 1 11:11:22 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC