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Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>	59	#include <unistd.h>
…		…
40	#include <stdio.h>	64	#include <stdio.h>
41		65
42	#include <assert.h>	66	#include <assert.h>
43	#include <errno.h>	67	#include <errno.h>
44	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
45	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
46	#include <sys/time.h>	72	#include <sys/time.h>
47	#include <time.h>	73	#include <time.h>
48		74
		75	/**/
		76
49	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	79	#endif
54		80
55	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
57	#endif	83	#endif
58		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
59	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
61	#endif	91	#endif
62		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_REALTIME
		98	# define EV_USE_REALTIME 1
		99	#endif
		100
		101	/**/
		102
		103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
		105	# define EV_USE_MONOTONIC 0
		106	#endif
		107
63	#ifndef CLOCK_REALTIME	108	#ifndef CLOCK_REALTIME
		109	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	110	# define EV_USE_REALTIME 0
65	#endif	111	#endif
66	#ifndef EV_USE_REALTIME	112
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	113	/**/
68	#endif
69		114
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#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) */	116	#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 */	117	#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 */	118	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		119
75	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		135
77	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
80		139
81	static ev_tstamp now, diff; /* monotonic clock */	140	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		141
91	/*****************************************************************************/	142	/*****************************************************************************/
92		143
93	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
94	ev_time (void)	178	ev_time (void)
95	{	179	{
96	#if EV_USE_REALTIME	180	#if EV_USE_REALTIME
97	struct timespec ts;	181	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	188	#endif
105	}	189	}
106		190
107	static ev_tstamp	191	inline ev_tstamp
108	get_clock (void)	192	get_clock (void)
109	{	193	{
110	#if EV_USE_MONOTONIC	194	#if EV_USE_MONOTONIC
111	if (have_monotonic)	195	if (expect_true (have_monotonic))
112	{	196	{
113	struct timespec ts;	197	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	200	}
117	#endif	201	#endif
118		202
119	return ev_time ();	203	return ev_time ();
120	}	204	}
121		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	212	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		213
124	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
126	{ \	216	{ \
127	int newcnt = cur; \	217	int newcnt = cur; \
128	do \	218	do \
129	{ \	219	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	220	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	226	cur = newcnt; \
137	}	227	}
138		228
139	/*****************************************************************************/	229	/*****************************************************************************/
140		230
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	231	static void
152	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
153	{	233	{
154	while (count--)	234	while (count--)
155	{	235	{
…		…
159		239
160	++base;	240	++base;
161	}	241	}
162	}	242	}
163		243
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	244	static void
174	event (W w, int events)	245	event (EV_P_ W w, int events)
175	{	246	{
176	if (w->pending)	247	if (w->pending)
177	{	248	{
178	pendings [w->pending - 1].events |= events;	249	pendings [ABSPRI (w)][w->pending - 1].events |= events;
179	return;	250	return;
180	}	251	}
181		252
182	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
184	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	257	}
187		258
188	static void	259	static void
189	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	261	{
191	int i;	262	int i;
192		263
193	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	265	event (EV_A_ events [i], type);
195	}	266	}
196		267
197	static void	268	static void
198	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
199	{	270	{
200	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	272	struct ev_io *w;
202		273
203	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
204	{	275	{
205	int ev = w->events & events;	276	int ev = w->events & events;
206		277
207	if (ev)	278	if (ev)
208	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
209	}	280	}
210	}	281	}
211		282
212	/*****************************************************************************/	283	/*****************************************************************************/
213		284
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	285	static void
218	fd_reify (void)	286	fd_reify (EV_P)
219	{	287	{
220	int i;	288	int i;
221		289
222	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
223	{	291	{
…		…
225	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	294	struct ev_io *w;
227		295
228	int events = 0;	296	int events = 0;
229		297
230	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
231	events |= w->events;	299	events |= w->events;
232		300
233	anfd->reify = 0;	301	anfd->reify = 0;
234		302
235	if (anfd->events != events)	303	if (anfd->events != events)
236	{	304	{
237	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	306	anfd->events = events;
239	}	307	}
240	}	308	}
241		309
242	fdchangecnt = 0;	310	fdchangecnt = 0;
243	}	311	}
244		312
245	static void	313	static void
246	fd_change (int fd)	314	fd_change (EV_P_ int fd)
247	{	315	{
248	if (anfds [fd].reify || fdchangecnt < 0)	316	if (anfds [fd].reify || fdchangecnt < 0)
249	return;	317	return;
250		318
251	anfds [fd].reify = 1;	319	anfds [fd].reify = 1;
…		…
253	++fdchangecnt;	321	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
255	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
256	}	324	}
257		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		335	}
		336	}
		337
258	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
259	static void	339	static void
260	fd_recheck (void)	340	fd_ebadf (EV_P)
261	{	341	{
262	int fd;	342	int fd;
263		343
264	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	345	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
267	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
268	{	358	{
269	ev_io_stop (anfds [fd].head);	359	close (fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	360	fd_kill (EV_A_ fd);
		361	return;
271	}	362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
272	}	378	}
273		379
274	/*****************************************************************************/	380	/*****************************************************************************/
275		381
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	382	static void
283	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
284	{	384	{
285	WT w = timers [k];	385	WT w = heap [k];
286		386
287	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
288	{	388	{
289	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
291	k >>= 1;	391	k >>= 1;
292	}	392	}
293		393
294	timers [k] = w;	394	heap [k] = w;
295	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
296		396
297	}	397	}
298		398
299	static void	399	static void
300	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
301	{	401	{
302	WT w = timers [k];	402	WT w = heap [k];
303		403
304	while (k < (N >> 1))	404	while (k < (N >> 1))
305	{	405	{
306	int j = k << 1;	406	int j = k << 1;
307		407
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	409	++j;
310		410
311	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
312	break;	412	break;
313		413
314	timers [k] = timers [j];	414	heap [k] = heap [j];
315	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
316	k = j;	416	k = j;
317	}	417	}
318		418
319	timers [k] = w;	419	heap [k] = w;
320	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
321	}	421	}
322		422
323	/*****************************************************************************/	423	/*****************************************************************************/
324		424
325	typedef struct	425	typedef struct
326	{	426	{
327	struct ev_signal *head;	427	struct ev_watcher_list *head;
328	sig_atomic_t volatile gotsig;	428	sig_atomic_t volatile gotsig;
329	} ANSIG;	429	} ANSIG;
330		430
331	static ANSIG *signals;	431	static ANSIG *signals;
332	static int signalmax;	432	static int signalmax;
…		…
352	{	452	{
353	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
354		454
355	if (!gotsig)	455	if (!gotsig)
356	{	456	{
		457	int old_errno = errno;
357	gotsig = 1;	458	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
359	}	461	}
360	}	462	}
361		463
362	static void	464	static void
363	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	466	{
365	struct ev_signal *w;	467	struct ev_watcher_list *w;
366	int sig;	468	int signum;
367		469
368	read (sigpipe [0], &revents, 1);	470	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	471	gotsig = 0;
370		472
371	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
373	{	475	{
374	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
375		477
376	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
378	}	480	}
379	}	481	}
380		482
381	static void	483	static void
382	siginit (void)	484	siginit (EV_P)
383	{	485	{
		486	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		489
387	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
390		494
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	498	}
394		499
395	/*****************************************************************************/	500	/*****************************************************************************/
396		501
397	static struct ev_idle **idles;	502	#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		503
408	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;	505	static struct ev_signal childev;
410		506
411	#ifndef WCONTINUED	507	#ifndef WCONTINUED
412	# define WCONTINUED 0	508	# define WCONTINUED 0
413	#endif	509	#endif
414		510
415	static void	511	static void
416	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	513	{
418	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		517	if (w->pid == pid || !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it *now* */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
419	int pid, status;	529	int pid, status;
420		530
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
423	if (w->pid == pid || w->pid == -1)	533	/* make sure we are called again until all childs have been reaped */
424	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	535
426	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
427	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
428	}	539	}
		540
		541	#endif
429		542
430	/*****************************************************************************/	543	/*****************************************************************************/
431		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
432	#if EV_USE_EPOLL	548	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	549	# include "ev_epoll.c"
434	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
435	#if EV_USE_SELECT	554	#if EV_USE_SELECT
436	# include "ev_select.c"	555	# include "ev_select.c"
437	#endif	556	#endif
438		557
439	int	558	int
…		…
446	ev_version_minor (void)	565	ev_version_minor (void)
447	{	566	{
448	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
449	}	568	}
450		569
451	int ev_init (int flags)	570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
452	{	573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	|| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
453	if (!ev_method)	591	if (!method)
454	{	592	{
455	#if EV_USE_MONOTONIC	593	#if EV_USE_MONOTONIC
456	{	594	{
457	struct timespec ts;	595	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	597	have_monotonic = 1;
460	}	598	}
461	#endif	599	#endif
462		600
463	ev_now = ev_time ();	601	rt_now = ev_time ();
464	now = get_clock ();	602	mn_now = get_clock ();
		603	now_floor = mn_now;
465	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
466		605
467	if (pipe (sigpipe))	606	if (methods == EVMETHOD_AUTO)
468	return 0;	607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
470	ev_method = EVMETHOD_NONE;	610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
471	#if EV_USE_EPOLL	616	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
473	#endif	621	#endif
474	#if EV_USE_SELECT	622	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	624	#endif
		625	}
		626	}
477		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/*TODO*/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/*TODO*/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
		702	if (pipe (sigpipe))
		703	return 0;
		704
		705	if (!default_loop)
		706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
478	if (ev_method)	715	if (ev_method (EV_A))
479	{	716	{
480	ev_watcher_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
481	siginit ();	719	siginit (EV_A);
482		720
		721	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
485	}	727	}
		728	else
		729	default_loop = 0;
486	}	730	}
487		731
488	return ev_method;	732	return default_loop;
489	}	733	}
490		734
491	/*****************************************************************************/
492
493	void	735	void
494	ev_fork_prepare (void)	736	ev_default_destroy (void)
495	{	737	{
496	/* nop */	738	#if EV_MULTIPLICITY
497	}	739	struct ev_loop *loop = default_loop;
498
499	void
500	ev_fork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_fork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif	740	#endif
512		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
513	ev_io_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
514	close (sigpipe [0]);	764	close (sigpipe [0]);
515	close (sigpipe [1]);	765	close (sigpipe [1]);
516	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
517	siginit ();	769	siginit (EV_A);
518	}	770	}
519		771
520	/*****************************************************************************/	772	/*****************************************************************************/
521		773
522	static void	774	static void
523	call_pending (void)	775	call_pending (EV_P)
524	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	780	while (pendingcnt [pri])
526	{	781	{
527	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		783
529	if (p->w)	784	if (p->w)
530	{	785	{
531	p->w->pending = 0;	786	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
533	}	788	}
534	}	789	}
535	}	790	}
536		791
537	static void	792	static void
538	timers_reify (void)	793	timers_reify (EV_P)
539	{	794	{
540	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
541	{	796	{
542	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
		798
		799	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		800
544	/* first reschedule or stop timer */	801	/* first reschedule or stop timer */
545	if (w->repeat)	802	if (w->repeat)
546	{	803	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	804	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	805	w->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	806	downheap ((WT *)timers, timercnt, 0);
550	}	807	}
551	else	808	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	809	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		810
554	event ((W)w, EV_TIMEOUT);	811	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	812	}
556	}	813	}
557		814
558	static void	815	static void
559	periodics_reify (void)	816	periodics_reify (EV_P)
560	{	817	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	818	while (periodiccnt && periodics [0]->at <= rt_now)
562	{	819	{
563	struct ev_periodic *w = periodics [0];	820	struct ev_periodic *w = periodics [0];
		821
		822	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
564		823
565	/* first reschedule or stop timer */	824	/* first reschedule or stop timer */
566	if (w->interval)	825	if (w->interval)
567	{	826	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	827	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));	828	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	829	downheap ((WT *)periodics, periodiccnt, 0);
571	}	830	}
572	else	831	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	832	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		833
575	event ((W)w, EV_PERIODIC);	834	event (EV_A_ (W)w, EV_PERIODIC);
576	}	835	}
577	}	836	}
578		837
579	static void	838	static void
580	periodics_reschedule (ev_tstamp diff)	839	periodics_reschedule (EV_P)
581	{	840	{
582	int i;	841	int i;
583		842
584	/* adjust periodics after time jump */	843	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	844	for (i = 0; i < periodiccnt; ++i)
586	{	845	{
587	struct ev_periodic *w = periodics [i];	846	struct ev_periodic *w = periodics [i];
588		847
589	if (w->interval)	848	if (w->interval)
590	{	849	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	850	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
592		851
593	if (fabs (diff) >= 1e-4)	852	if (fabs (diff) >= 1e-4)
594	{	853	{
595	ev_periodic_stop (w);	854	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	855	ev_periodic_start (EV_A_ w);
597		856
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	857	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	858	}
600	}	859	}
601	}	860	}
602	}	861	}
603		862
		863	inline int
		864	time_update_monotonic (EV_P)
		865	{
		866	mn_now = get_clock ();
		867
		868	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		869	{
		870	rt_now = rtmn_diff + mn_now;
		871	return 0;
		872	}
		873	else
		874	{
		875	now_floor = mn_now;
		876	rt_now = ev_time ();
		877	return 1;
		878	}
		879	}
		880
604	static void	881	static void
605	time_update (void)	882	time_update (EV_P)
606	{	883	{
607	int i;	884	int i;
608		885
609	ev_now = ev_time ();	886	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	887	if (expect_true (have_monotonic))
612	{	888	{
613	ev_tstamp odiff = diff;	889	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	890	{
617	now = get_clock ();	891	ev_tstamp odiff = rtmn_diff;
		892
		893	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		894	{
618	diff = ev_now - now;	895	rtmn_diff = rt_now - mn_now;
619		896
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	897	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	898	return; /* all is well */
622		899
623	ev_now = ev_time ();	900	rt_now = ev_time ();
		901	mn_now = get_clock ();
		902	now_floor = mn_now;
		903	}
		904
		905	periodics_reschedule (EV_A);
		906	/* no timer adjustment, as the monotonic clock doesn't jump */
		907	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
624	}	908	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	909	}
629	else	910	else
		911	#endif
630	{	912	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	913	rt_now = ev_time ();
		914
		915	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
632	{	916	{
633	periodics_reschedule (ev_now - now);	917	periodics_reschedule (EV_A);
634		918
635	/* adjust timers. this is easy, as the offset is the same for all */	919	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	920	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	921	timers [i]->at += rt_now - mn_now;
638	}	922	}
639		923
640	now = ev_now;	924	mn_now = rt_now;
641	}	925	}
642	}	926	}
643		927
644	int ev_loop_done;	928	void
		929	ev_ref (EV_P)
		930	{
		931	++activecnt;
		932	}
645		933
		934	void
		935	ev_unref (EV_P)
		936	{
		937	--activecnt;
		938	}
		939
		940	static int loop_done;
		941
		942	void
646	void ev_loop (int flags)	943	ev_loop (EV_P_ int flags)
647	{	944	{
648	double block;	945	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	946	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650		947
651	do	948	do
652	{	949	{
653	/* queue check watchers (and execute them) */	950	/* queue check watchers (and execute them) */
654	if (preparecnt)	951	if (expect_false (preparecnt))
655	{	952	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	953	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	954	call_pending (EV_A);
658	}	955	}
659		956
660	/* update fd-related kernel structures */	957	/* update fd-related kernel structures */
661	fd_reify ();	958	fd_reify (EV_A);
662		959
663	/* calculate blocking time */	960	/* calculate blocking time */
664		961
665	/* we only need this for !monotonic clockor timers, but as we basically	962	/* we only need this for !monotonic clockor timers, but as we basically
666	always have timers, we just calculate it always */	963	always have timers, we just calculate it always */
		964	#if EV_USE_MONOTONIC
		965	if (expect_true (have_monotonic))
		966	time_update_monotonic (EV_A);
		967	else
		968	#endif
		969	{
667	ev_now = ev_time ();	970	rt_now = ev_time ();
		971	mn_now = rt_now;
		972	}
668		973
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	974	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	975	block = 0.;
671	else	976	else
672	{	977	{
673	block = MAX_BLOCKTIME;	978	block = MAX_BLOCKTIME;
674		979
675	if (timercnt)	980	if (timercnt)
676	{	981	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	982	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
678	if (block > to) block = to;	983	if (block > to) block = to;
679	}	984	}
680		985
681	if (periodiccnt)	986	if (periodiccnt)
682	{	987	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	988	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
684	if (block > to) block = to;	989	if (block > to) block = to;
685	}	990	}
686		991
687	if (block < 0.) block = 0.;	992	if (block < 0.) block = 0.;
688	}	993	}
689		994
690	method_poll (block);	995	method_poll (EV_A_ block);
691		996
692	/* update ev_now, do magic */	997	/* update rt_now, do magic */
693	time_update ();	998	time_update (EV_A);
694		999
695	/* queue pending timers and reschedule them */	1000	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1001	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	1002	periodics_reify (EV_A); /* absolute timers called first */
698		1003
699	/* queue idle watchers unless io or timers are pending */	1004	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1005	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1006	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1007
703	/* queue check watchers, to be executed first */	1008	/* queue check watchers, to be executed first */
704	if (checkcnt)	1009	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1010	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1011
707	call_pending ();	1012	call_pending (EV_A);
708	}	1013	}
709	while (!ev_loop_done);	1014	while (activecnt && !loop_done);
710		1015
711	if (ev_loop_done != 2)	1016	if (loop_done != 2)
712	ev_loop_done = 0;	1017	loop_done = 0;
		1018	}
		1019
		1020	void
		1021	ev_unloop (EV_P_ int how)
		1022	{
		1023	loop_done = how;
713	}	1024	}
714		1025
715	/*****************************************************************************/	1026	/*****************************************************************************/
716		1027
717	static void	1028	inline void
718	wlist_add (WL *head, WL elem)	1029	wlist_add (WL *head, WL elem)
719	{	1030	{
720	elem->next = *head;	1031	elem->next = *head;
721	*head = elem;	1032	*head = elem;
722	}	1033	}
723		1034
724	static void	1035	inline void
725	wlist_del (WL *head, WL elem)	1036	wlist_del (WL *head, WL elem)
726	{	1037	{
727	while (*head)	1038	while (*head)
728	{	1039	{
729	if (*head == elem)	1040	if (*head == elem)
…		…
734		1045
735	head = &(*head)->next;	1046	head = &(*head)->next;
736	}	1047	}
737	}	1048	}
738		1049
739	static void	1050	inline void
740	ev_clear_pending (W w)	1051	ev_clear_pending (EV_P_ W w)
741	{	1052	{
742	if (w->pending)	1053	if (w->pending)
743	{	1054	{
744	pendings [w->pending - 1].w = 0;	1055	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1056	w->pending = 0;
746	}	1057	}
747	}	1058	}
748		1059
749	static void	1060	inline void
750	ev_start (W w, int active)	1061	ev_start (EV_P_ W w, int active)
751	{	1062	{
		1063	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1064	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1065
752	w->active = active;	1066	w->active = active;
		1067	ev_ref (EV_A);
753	}	1068	}
754		1069
755	static void	1070	inline void
756	ev_stop (W w)	1071	ev_stop (EV_P_ W w)
757	{	1072	{
		1073	ev_unref (EV_A);
758	w->active = 0;	1074	w->active = 0;
759	}	1075	}
760		1076
761	/*****************************************************************************/	1077	/*****************************************************************************/
762		1078
763	void	1079	void
764	ev_io_start (struct ev_io *w)	1080	ev_io_start (EV_P_ struct ev_io *w)
765	{	1081	{
		1082	int fd = w->fd;
		1083
766	if (ev_is_active (w))	1084	if (ev_is_active (w))
767	return;	1085	return;
768		1086
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1087	assert (("ev_io_start called with negative fd", fd >= 0));
772		1088
773	ev_start ((W)w, 1);	1089	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1090	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1091	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1092
777	fd_change (fd);	1093	fd_change (EV_A_ fd);
778	}	1094	}
779		1095
780	void	1096	void
781	ev_io_stop (struct ev_io *w)	1097	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1098	{
783	ev_clear_pending ((W)w);	1099	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1100	if (!ev_is_active (w))
785	return;	1101	return;
786		1102
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1103	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
789		1105
790	fd_change (w->fd);	1106	fd_change (EV_A_ w->fd);
791	}	1107	}
792		1108
793	void	1109	void
794	ev_timer_start (struct ev_timer *w)	1110	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1111	{
796	if (ev_is_active (w))	1112	if (ev_is_active (w))
797	return;	1113	return;
798		1114
799	w->at += now;	1115	w->at += mn_now;
800		1116
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1117	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1118
803	ev_start ((W)w, ++timercnt);	1119	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1120	array_needsize (timers, timermax, timercnt, );
805	timers [timercnt - 1] = w;	1121	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1122	upheap ((WT *)timers, timercnt - 1);
807	}	1123	}
808		1124
809	void	1125	void
810	ev_timer_stop (struct ev_timer *w)	1126	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1127	{
812	ev_clear_pending ((W)w);	1128	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
814	return;	1130	return;
815		1131
816	if (w->active < timercnt--)	1132	if (w->active < timercnt--)
817	{	1133	{
…		…
819	downheap ((WT *)timers, timercnt, w->active - 1);	1135	downheap ((WT *)timers, timercnt, w->active - 1);
820	}	1136	}
821		1137
822	w->at = w->repeat;	1138	w->at = w->repeat;
823		1139
824	ev_stop ((W)w);	1140	ev_stop (EV_A_ (W)w);
825	}	1141	}
826		1142
827	void	1143	void
828	ev_timer_again (struct ev_timer *w)	1144	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1145	{
830	if (ev_is_active (w))	1146	if (ev_is_active (w))
831	{	1147	{
832	if (w->repeat)	1148	if (w->repeat)
833	{	1149	{
834	w->at = now + w->repeat;	1150	w->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, w->active - 1);
836	}	1152	}
837	else	1153	else
838	ev_timer_stop (w);	1154	ev_timer_stop (EV_A_ w);
839	}	1155	}
840	else if (w->repeat)	1156	else if (w->repeat)
841	ev_timer_start (w);	1157	ev_timer_start (EV_A_ w);
842	}	1158	}
843		1159
844	void	1160	void
845	ev_periodic_start (struct ev_periodic *w)	1161	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1162	{
847	if (ev_is_active (w))	1163	if (ev_is_active (w))
848	return;	1164	return;
849		1165
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1166	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1167
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1168	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)	1169	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1170	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
855		1171
856	ev_start ((W)w, ++periodiccnt);	1172	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1173	array_needsize (periodics, periodicmax, periodiccnt, );
858	periodics [periodiccnt - 1] = w;	1174	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1175	upheap ((WT *)periodics, periodiccnt - 1);
860	}	1176	}
861		1177
862	void	1178	void
863	ev_periodic_stop (struct ev_periodic *w)	1179	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1180	{
865	ev_clear_pending ((W)w);	1181	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1182	if (!ev_is_active (w))
867	return;	1183	return;
868		1184
869	if (w->active < periodiccnt--)	1185	if (w->active < periodiccnt--)
870	{	1186	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1187	periodics [w->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1188	downheap ((WT *)periodics, periodiccnt, w->active - 1);
873	}	1189	}
874		1190
875	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
876	}	1192	}
877		1193
878	void	1194	void
879	ev_signal_start (struct ev_signal *w)	1195	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1196	{
881	if (ev_is_active (w))	1197	if (ev_is_active (w))
882	return;	1198	return;
883		1199
		1200	ev_start (EV_A_ (W)w, ++idlecnt);
		1201	array_needsize (idles, idlemax, idlecnt, );
		1202	idles [idlecnt - 1] = w;
		1203	}
		1204
		1205	void
		1206	ev_idle_stop (EV_P_ struct ev_idle *w)
		1207	{
		1208	ev_clear_pending (EV_A_ (W)w);
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	idles [w->active - 1] = idles [--idlecnt];
		1213	ev_stop (EV_A_ (W)w);
		1214	}
		1215
		1216	void
		1217	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1218	{
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	ev_start (EV_A_ (W)w, ++preparecnt);
		1223	array_needsize (prepares, preparemax, preparecnt, );
		1224	prepares [preparecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	prepares [w->active - 1] = prepares [--preparecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_check_start (EV_P_ struct ev_check *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++checkcnt);
		1245	array_needsize (checks, checkmax, checkcnt, );
		1246	checks [checkcnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_check_stop (EV_P_ struct ev_check *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	checks [w->active - 1] = checks [--checkcnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	#ifndef SA_RESTART
		1261	# define SA_RESTART 0
		1262	#endif
		1263
		1264	void
		1265	ev_signal_start (EV_P_ struct ev_signal *w)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1269	#endif
		1270	if (ev_is_active (w))
		1271	return;
		1272
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1273	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1274
886	ev_start ((W)w, 1);	1275	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1276	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1277	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1278
890	if (!w->next)	1279	if (!w->next)
891	{	1280	{
892	struct sigaction sa;	1281	struct sigaction sa;
893	sa.sa_handler = sighandler;	1282	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1283	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1284	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1285	sigaction (w->signum, &sa, 0);
897	}	1286	}
898	}	1287	}
899		1288
900	void	1289	void
901	ev_signal_stop (struct ev_signal *w)	1290	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1291	{
903	ev_clear_pending ((W)w);	1292	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1293	if (!ev_is_active (w))
905	return;	1294	return;
906		1295
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1296	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1297	ev_stop (EV_A_ (W)w);
909		1298
910	if (!signals [w->signum - 1].head)	1299	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1300	signal (w->signum, SIG_DFL);
912	}	1301	}
913		1302
914	void	1303	void
915	ev_idle_start (struct ev_idle *w)	1304	ev_child_start (EV_P_ struct ev_child *w)
916	{	1305	{
		1306	#if EV_MULTIPLICITY
		1307	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1308	#endif
917	if (ev_is_active (w))	1309	if (ev_is_active (w))
918	return;	1310	return;
919		1311
920	ev_start ((W)w, ++idlecnt);	1312	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1313	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1314	}
924		1315
925	void	1316	void
926	ev_idle_stop (struct ev_idle *w)	1317	ev_child_stop (EV_P_ struct ev_child *w)
927	{	1318	{
928	ev_clear_pending ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1320	if (ev_is_active (w))
930	return;	1321	return;
931		1322
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)
982	{
983	if (ev_is_active (w))
984	return;
985
986	ev_start ((W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}
989
990	void
991	ev_child_stop (struct ev_child *w)
992	{
993	ev_clear_pending ((W)w);
994	if (ev_is_active (w))
995	return;
996
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1323	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1324	ev_stop (EV_A_ (W)w);
999	}	1325	}
1000		1326
1001	/*****************************************************************************/	1327	/*****************************************************************************/
1002		1328
1003	struct ev_once	1329	struct ev_once
…		…
1007	void (*cb)(int revents, void *arg);	1333	void (*cb)(int revents, void *arg);
1008	void *arg;	1334	void *arg;
1009	};	1335	};
1010		1336
1011	static void	1337	static void
1012	once_cb (struct ev_once *once, int revents)	1338	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1339	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1340	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1341	void *arg = once->arg;
1016		1342
1017	ev_io_stop (&once->io);	1343	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1344	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1345	free (once);
1020		1346
1021	cb (revents, arg);	1347	cb (revents, arg);
1022	}	1348	}
1023		1349
1024	static void	1350	static void
1025	once_cb_io (struct ev_io *w, int revents)	1351	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1352	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1353	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	1354	}
1029		1355
1030	static void	1356	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1357	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1358	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1359	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	1360	}
1035		1361
1036	void	1362	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1363	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	1364	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1365	struct ev_once *once = malloc (sizeof (struct ev_once));
1040		1366
1041	if (!once)	1367	if (!once)
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1368	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1047		1373
1048	ev_watcher_init (&once->io, once_cb_io);	1374	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1375	if (fd >= 0)
1050	{	1376	{
1051	ev_io_set (&once->io, fd, events);	1377	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1378	ev_io_start (EV_A_ &once->io);
1053	}	1379	}
1054		1380
1055	ev_watcher_init (&once->to, once_cb_to);	1381	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1382	if (timeout >= 0.)
1057	{	1383	{
1058	ev_timer_set (&once->to, timeout, 0.);	1384	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1385	ev_timer_start (EV_A_ &once->to);
1060	}	1386	}
1061	}	1387	}
1062	}	1388	}
1063		1389
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}
1141
1142	#endif
1143
1144
1145
1146

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