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Comparing libev/ev.c (file contents):
Revision 1.32 by root, Thu Nov 1 09:21:51 2007 UTC vs.
Revision 1.58 by root, Sun Nov 4 16:52:52 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_EMBED
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
		98	#ifndef EV_EMBED
75	#include "ev.h"	99	# include "ev.h"
		100	#endif
		101
		102	#if __GNUC__ >= 3
		103	# define expect(expr,value) __builtin_expect ((expr),(value))
		104	# define inline inline
		105	#else
		106	# define expect(expr,value) (expr)
		107	# define inline static
		108	#endif
		109
		110	#define expect_false(expr) expect ((expr) != 0, 0)
		111	#define expect_true(expr) expect ((expr) != 0, 1)
		112
		113	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		114	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		115
77	typedef struct ev_watcher *W;	116	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	117	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	118	typedef struct ev_watcher_time *WT;
80		119
81	static ev_tstamp now, diff; /* monotonic clock */	120	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		121
91	/*****************************************************************************/	122	/*****************************************************************************/
92		123
93	ev_tstamp	124	typedef struct
		125	{
		126	struct ev_watcher_list *head;
		127	unsigned char events;
		128	unsigned char reify;
		129	} ANFD;
		130
		131	typedef struct
		132	{
		133	W w;
		134	int events;
		135	} ANPENDING;
		136
		137	#if EV_MULTIPLICITY
		138
		139	struct ev_loop
		140	{
		141	# define VAR(name,decl) decl;
		142	# include "ev_vars.h"
		143	};
		144	# undef VAR
		145	# include "ev_wrap.h"
		146
		147	#else
		148
		149	# define VAR(name,decl) static decl;
		150	# include "ev_vars.h"
		151	# undef VAR
		152
		153	#endif
		154
		155	/*****************************************************************************/
		156
		157	inline ev_tstamp
94	ev_time (void)	158	ev_time (void)
95	{	159	{
96	#if EV_USE_REALTIME	160	#if EV_USE_REALTIME
97	struct timespec ts;	161	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	162	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	166	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	167	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	168	#endif
105	}	169	}
106		170
107	static ev_tstamp	171	inline ev_tstamp
108	get_clock (void)	172	get_clock (void)
109	{	173	{
110	#if EV_USE_MONOTONIC	174	#if EV_USE_MONOTONIC
111	if (have_monotonic)	175	if (expect_true (have_monotonic))
112	{	176	{
113	struct timespec ts;	177	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	178	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	179	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	180	}
117	#endif	181	#endif
118		182
119	return ev_time ();	183	return ev_time ();
120	}	184	}
121		185
		186	ev_tstamp
		187	ev_now (EV_P)
		188	{
		189	return rt_now;
		190	}
		191
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	192	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		193
124	#define array_needsize(base,cur,cnt,init) \	194	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	195	if (expect_false ((cnt) > cur)) \
126	{ \	196	{ \
127	int newcnt = cur; \	197	int newcnt = cur; \
128	do \	198	do \
129	{ \	199	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	200	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	206	cur = newcnt; \
137	}	207	}
138		208
139	/*****************************************************************************/	209	/*****************************************************************************/
140		210
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149
150	static void	211	static void
151	anfds_init (ANFD *base, int count)	212	anfds_init (ANFD *base, int count)
152	{	213	{
153	while (count--)	214	while (count--)
154	{	215	{
155	base->head = 0;	216	base->head = 0;
156	base->events = EV_NONE;	217	base->events = EV_NONE;
		218	base->reify = 0;
		219
157	++base;	220	++base;
158	}	221	}
159	}	222	}
160		223
161	typedef struct
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void	224	static void
171	event (W w, int events)	225	event (EV_P_ W w, int events)
172	{	226	{
173	if (w->pending)	227	if (w->pending)
174	{	228	{
175	pendings [w->pending - 1].events |= events;	229	pendings [ABSPRI (w)][w->pending - 1].events |= events;
176	return;	230	return;
177	}	231	}
178		232
179	w->pending = ++pendingcnt;	233	w->pending = ++pendingcnt [ABSPRI (w)];
180	array_needsize (pendings, pendingmax, pendingcnt, );	234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
181	pendings [pendingcnt - 1].w = w;	235	pendings [ABSPRI (w)][w->pending - 1].w = w;
182	pendings [pendingcnt - 1].events = events;	236	pendings [ABSPRI (w)][w->pending - 1].events = events;
183	}	237	}
184		238
185	static void	239	static void
186	queue_events (W *events, int eventcnt, int type)	240	queue_events (EV_P_ W *events, int eventcnt, int type)
187	{	241	{
188	int i;	242	int i;
189		243
190	for (i = 0; i < eventcnt; ++i)	244	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);	245	event (EV_A_ events [i], type);
192	}	246	}
193		247
194	static void	248	static void
195	fd_event (int fd, int events)	249	fd_event (EV_P_ int fd, int events)
196	{	250	{
197	ANFD *anfd = anfds + fd;	251	ANFD *anfd = anfds + fd;
198	struct ev_io *w;	252	struct ev_io *w;
199		253
200	for (w = anfd->head; w; w = w->next)	254	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
201	{	255	{
202	int ev = w->events & events;	256	int ev = w->events & events;
203		257
204	if (ev)	258	if (ev)
205	event ((W)w, ev);	259	event (EV_A_ (W)w, ev);
206	}	260	}
207	}	261	}
208		262
209	/*****************************************************************************/	263	/*****************************************************************************/
210		264
211	static int *fdchanges;
212	static int fdchangemax, fdchangecnt;
213
214	static void	265	static void
215	fd_reify (void)	266	fd_reify (EV_P)
216	{	267	{
217	int i;	268	int i;
218		269
219	for (i = 0; i < fdchangecnt; ++i)	270	for (i = 0; i < fdchangecnt; ++i)
220	{	271	{
…		…
222	ANFD *anfd = anfds + fd;	273	ANFD *anfd = anfds + fd;
223	struct ev_io *w;	274	struct ev_io *w;
224		275
225	int events = 0;	276	int events = 0;
226		277
227	for (w = anfd->head; w; w = w->next)	278	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
228	events |= w->events;	279	events |= w->events;
229		280
230	anfd->events &= ~EV_REIFY;	281	anfd->reify = 0;
231		282
232	if (anfd->events != events)	283	if (anfd->events != events)
233	{	284	{
234	method_modify (fd, anfd->events, events);	285	method_modify (EV_A_ fd, anfd->events, events);
235	anfd->events = events;	286	anfd->events = events;
236	}	287	}
237	}	288	}
238		289
239	fdchangecnt = 0;	290	fdchangecnt = 0;
240	}	291	}
241		292
242	static void	293	static void
243	fd_change (int fd)	294	fd_change (EV_P_ int fd)
244	{	295	{
245	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	296	if (anfds [fd].reify || fdchangecnt < 0)
246	return;	297	return;
247		298
248	anfds [fd].events |= EV_REIFY;	299	anfds [fd].reify = 1;
249		300
250	++fdchangecnt;	301	++fdchangecnt;
251	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
252	fdchanges [fdchangecnt - 1] = fd;	303	fdchanges [fdchangecnt - 1] = fd;
253	}	304	}
254		305
		306	static void
		307	fd_kill (EV_P_ int fd)
		308	{
		309	struct ev_io *w;
		310
		311	while ((w = (struct ev_io *)anfds [fd].head))
		312	{
		313	ev_io_stop (EV_A_ w);
		314	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		315	}
		316	}
		317
255	/* called on EBADF to verify fds */	318	/* called on EBADF to verify fds */
256	static void	319	static void
257	fd_recheck (void)	320	fd_ebadf (EV_P)
258	{	321	{
259	int fd;	322	int fd;
260		323
261	for (fd = 0; fd < anfdmax; ++fd)	324	for (fd = 0; fd < anfdmax; ++fd)
262	if (anfds [fd].events)	325	if (anfds [fd].events)
263	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
264	while (anfds [fd].head)	327	fd_kill (EV_A_ fd);
		328	}
		329
		330	/* called on ENOMEM in select/poll to kill some fds and retry */
		331	static void
		332	fd_enomem (EV_P)
		333	{
		334	int fd = anfdmax;
		335
		336	while (fd--)
		337	if (anfds [fd].events)
265	{	338	{
266	ev_io_stop (anfds [fd].head);	339	close (fd);
267	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	340	fd_kill (EV_A_ fd);
		341	return;
268	}	342	}
		343	}
		344
		345	/* susually called after fork if method needs to re-arm all fds from scratch */
		346	static void
		347	fd_rearm_all (EV_P)
		348	{
		349	int fd;
		350
		351	/* this should be highly optimised to not do anything but set a flag */
		352	for (fd = 0; fd < anfdmax; ++fd)
		353	if (anfds [fd].events)
		354	{
		355	anfds [fd].events = 0;
		356	fd_change (fd);
		357	}
269	}	358	}
270		359
271	/*****************************************************************************/	360	/*****************************************************************************/
272		361
273	static struct ev_timer **timers;
274	static int timermax, timercnt;
275
276	static struct ev_periodic **periodics;
277	static int periodicmax, periodiccnt;
278
279	static void	362	static void
280	upheap (WT *timers, int k)	363	upheap (WT *heap, int k)
281	{	364	{
282	WT w = timers [k];	365	WT w = heap [k];
283		366
284	while (k && timers [k >> 1]->at > w->at)	367	while (k && heap [k >> 1]->at > w->at)
285	{	368	{
286	timers [k] = timers [k >> 1];	369	heap [k] = heap [k >> 1];
287	timers [k]->active = k + 1;	370	heap [k]->active = k + 1;
288	k >>= 1;	371	k >>= 1;
289	}	372	}
290		373
291	timers [k] = w;	374	heap [k] = w;
292	timers [k]->active = k + 1;	375	heap [k]->active = k + 1;
293		376
294	}	377	}
295		378
296	static void	379	static void
297	downheap (WT *timers, int N, int k)	380	downheap (WT *heap, int N, int k)
298	{	381	{
299	WT w = timers [k];	382	WT w = heap [k];
300		383
301	while (k < (N >> 1))	384	while (k < (N >> 1))
302	{	385	{
303	int j = k << 1;	386	int j = k << 1;
304		387
305	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
306	++j;	389	++j;
307		390
308	if (w->at <= timers [j]->at)	391	if (w->at <= heap [j]->at)
309	break;	392	break;
310		393
311	timers [k] = timers [j];	394	heap [k] = heap [j];
312	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
313	k = j;	396	k = j;
314	}	397	}
315		398
316	timers [k] = w;	399	heap [k] = w;
317	timers [k]->active = k + 1;	400	heap [k]->active = k + 1;
318	}	401	}
319		402
320	/*****************************************************************************/	403	/*****************************************************************************/
321		404
322	typedef struct	405	typedef struct
323	{	406	{
324	struct ev_signal *head;	407	struct ev_watcher_list *head;
325	sig_atomic_t gotsig;	408	sig_atomic_t volatile gotsig;
326	} ANSIG;	409	} ANSIG;
327		410
328	static ANSIG *signals;	411	static ANSIG *signals;
329	static int signalmax;	412	static int signalmax;
330		413
331	static int sigpipe [2];	414	static int sigpipe [2];
332	static sig_atomic_t gotsig;	415	static sig_atomic_t volatile gotsig;
333	static struct ev_io sigev;
334		416
335	static void	417	static void
336	signals_init (ANSIG *base, int count)	418	signals_init (ANSIG *base, int count)
337	{	419	{
338	while (count--)	420	while (count--)
339	{	421	{
340	base->head = 0;	422	base->head = 0;
341	base->gotsig = 0;	423	base->gotsig = 0;
		424
342	++base;	425	++base;
343	}	426	}
344	}	427	}
345		428
346	static void	429	static void
…		…
348	{	431	{
349	signals [signum - 1].gotsig = 1;	432	signals [signum - 1].gotsig = 1;
350		433
351	if (!gotsig)	434	if (!gotsig)
352	{	435	{
		436	int old_errno = errno;
353	gotsig = 1;	437	gotsig = 1;
354	write (sigpipe [1], &gotsig, 1);	438	write (sigpipe [1], &signum, 1);
		439	errno = old_errno;
355	}	440	}
356	}	441	}
357		442
358	static void	443	static void
359	sigcb (struct ev_io *iow, int revents)	444	sigcb (EV_P_ struct ev_io *iow, int revents)
360	{	445	{
361	struct ev_signal *w;	446	struct ev_watcher_list *w;
362	int sig;	447	int signum;
363		448
		449	read (sigpipe [0], &revents, 1);
364	gotsig = 0;	450	gotsig = 0;
365	read (sigpipe [0], &revents, 1);
366		451
367	for (sig = signalmax; sig--; )	452	for (signum = signalmax; signum--; )
368	if (signals [sig].gotsig)	453	if (signals [signum].gotsig)
369	{	454	{
370	signals [sig].gotsig = 0;	455	signals [signum].gotsig = 0;
371		456
372	for (w = signals [sig].head; w; w = w->next)	457	for (w = signals [signum].head; w; w = w->next)
373	event ((W)w, EV_SIGNAL);	458	event (EV_A_ (W)w, EV_SIGNAL);
374	}	459	}
375	}	460	}
376		461
377	static void	462	static void
378	siginit (void)	463	siginit (EV_P)
379	{	464	{
		465	#ifndef WIN32
380	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
381	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
382		468
383	/* rather than sort out wether we really need nb, set it */	469	/* rather than sort out wether we really need nb, set it */
384	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
385	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		472	#endif
386		473
387	ev_io_set (&sigev, sigpipe [0], EV_READ);	474	ev_io_set (&sigev, sigpipe [0], EV_READ);
388	ev_io_start (&sigev);	475	ev_io_start (EV_A_ &sigev);
		476	ev_unref (EV_A); /* child watcher should not keep loop alive */
389	}	477	}
390		478
391	/*****************************************************************************/	479	/*****************************************************************************/
392		480
393	static struct ev_idle **idles;	481	#ifndef WIN32
394	static int idlemax, idlecnt;
395
396	static struct ev_prepare **prepares;
397	static int preparemax, preparecnt;
398
399	static struct ev_check **checks;
400	static int checkmax, checkcnt;
401
402	/*****************************************************************************/
403
404	static struct ev_child *childs [PID_HASHSIZE];
405	static struct ev_signal childev;
406		482
407	#ifndef WCONTINUED	483	#ifndef WCONTINUED
408	# define WCONTINUED 0	484	# define WCONTINUED 0
409	#endif	485	#endif
410		486
411	static void	487	static void
412	childcb (struct ev_signal *sw, int revents)	488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
413	{	489	{
414	struct ev_child *w;	490	struct ev_child *w;
		491
		492	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		493	if (w->pid == pid || !w->pid)
		494	{
		495	w->priority = sw->priority; /* need to do it *now* */
		496	w->rpid = pid;
		497	w->rstatus = status;
		498	event (EV_A_ (W)w, EV_CHILD);
		499	}
		500	}
		501
		502	static void
		503	childcb (EV_P_ struct ev_signal *sw, int revents)
		504	{
415	int pid, status;	505	int pid, status;
416		506
417	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	507	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
418	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	508	{
419	if (w->pid == pid || w->pid == -1)	509	/* make sure we are called again until all childs have been reaped */
420	{	510	event (EV_A_ (W)sw, EV_SIGNAL);
421	w->status = status;	511
422	event ((W)w, EV_CHILD);	512	child_reap (EV_A_ sw, pid, pid, status);
423	}	513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		514	}
424	}	515	}
		516
		517	#endif
425		518
426	/*****************************************************************************/	519	/*****************************************************************************/
427		520
		521	#if EV_USE_KQUEUE
		522	# include "ev_kqueue.c"
		523	#endif
428	#if EV_USE_EPOLL	524	#if EV_USE_EPOLL
429	# include "ev_epoll.c"	525	# include "ev_epoll.c"
430	#endif	526	#endif
		527	#if EV_USEV_POLL
		528	# include "ev_poll.c"
		529	#endif
431	#if EV_USE_SELECT	530	#if EV_USE_SELECT
432	# include "ev_select.c"	531	# include "ev_select.c"
433	#endif	532	#endif
434		533
435	int	534	int
…		…
442	ev_version_minor (void)	541	ev_version_minor (void)
443	{	542	{
444	return EV_VERSION_MINOR;	543	return EV_VERSION_MINOR;
445	}	544	}
446		545
447	int ev_init (int flags)	546	/* return true if we are running with elevated privileges and should ignore env variables */
		547	static int
		548	enable_secure (void)
448	{	549	{
		550	#ifdef WIN32
		551	return 0;
		552	#else
		553	return getuid () != geteuid ()
		554	|| getgid () != getegid ();
		555	#endif
		556	}
		557
		558	int
		559	ev_method (EV_P)
		560	{
		561	return method;
		562	}
		563
		564	static void
		565	loop_init (EV_P_ int methods)
		566	{
449	if (!ev_method)	567	if (!method)
450	{	568	{
451	#if EV_USE_MONOTONIC	569	#if EV_USE_MONOTONIC
452	{	570	{
453	struct timespec ts;	571	struct timespec ts;
454	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
455	have_monotonic = 1;	573	have_monotonic = 1;
456	}	574	}
457	#endif	575	#endif
458		576
459	ev_now = ev_time ();	577	rt_now = ev_time ();
460	now = get_clock ();	578	mn_now = get_clock ();
		579	now_floor = mn_now;
461	diff = ev_now - now;	580	rtmn_diff = rt_now - mn_now;
462		581
463	if (pipe (sigpipe))	582	if (methods == EVMETHOD_AUTO)
464	return 0;	583	if (!enable_secure () && getenv ("LIBEV_METHODS"))
465		584	methods = atoi (getenv ("LIBEV_METHODS"));
		585	else
466	ev_method = EVMETHOD_NONE;	586	methods = EVMETHOD_ANY;
		587
		588	method = 0;
		589	#if EV_USE_KQUEUE
		590	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		591	#endif
467	#if EV_USE_EPOLL	592	#if EV_USE_EPOLL
468	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	593	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		594	#endif
		595	#if EV_USEV_POLL
		596	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
469	#endif	597	#endif
470	#if EV_USE_SELECT	598	#if EV_USE_SELECT
471	if (ev_method == EVMETHOD_NONE) select_init (flags);	599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
472	#endif	600	#endif
		601	}
		602	}
473		603
		604	void
		605	loop_destroy (EV_P)
		606	{
		607	#if EV_USE_KQUEUE
		608	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		609	#endif
		610	#if EV_USE_EPOLL
		611	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		612	#endif
		613	#if EV_USEV_POLL
		614	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		615	#endif
		616	#if EV_USE_SELECT
		617	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		618	#endif
		619
		620	method = 0;
		621	/*TODO*/
		622	}
		623
		624	void
		625	loop_fork (EV_P)
		626	{
		627	/*TODO*/
		628	#if EV_USE_EPOLL
		629	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		630	#endif
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		633	#endif
		634	}
		635
		636	#if EV_MULTIPLICITY
		637	struct ev_loop *
		638	ev_loop_new (int methods)
		639	{
		640	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		641
		642	loop_init (EV_A_ methods);
		643
		644	if (ev_methods (EV_A))
		645	return loop;
		646
		647	return 0;
		648	}
		649
		650	void
		651	ev_loop_destroy (EV_P)
		652	{
		653	loop_destroy (EV_A);
		654	free (loop);
		655	}
		656
		657	void
		658	ev_loop_fork (EV_P)
		659	{
		660	loop_fork (EV_A);
		661	}
		662
		663	#endif
		664
		665	#if EV_MULTIPLICITY
		666	struct ev_loop default_loop_struct;
		667	static struct ev_loop *default_loop;
		668
		669	struct ev_loop *
		670	#else
		671	static int default_loop;
		672
		673	int
		674	#endif
		675	ev_default_loop (int methods)
		676	{
		677	if (sigpipe [0] == sigpipe [1])
		678	if (pipe (sigpipe))
		679	return 0;
		680
		681	if (!default_loop)
		682	{
		683	#if EV_MULTIPLICITY
		684	struct ev_loop *loop = default_loop = &default_loop_struct;
		685	#else
		686	default_loop = 1;
		687	#endif
		688
		689	loop_init (EV_A_ methods);
		690
474	if (ev_method)	691	if (ev_method (EV_A))
475	{	692	{
476	ev_watcher_init (&sigev, sigcb);	693	ev_watcher_init (&sigev, sigcb);
		694	ev_set_priority (&sigev, EV_MAXPRI);
477	siginit ();	695	siginit (EV_A);
478		696
		697	#ifndef WIN32
479	ev_signal_init (&childev, childcb, SIGCHLD);	698	ev_signal_init (&childev, childcb, SIGCHLD);
		699	ev_set_priority (&childev, EV_MAXPRI);
480	ev_signal_start (&childev);	700	ev_signal_start (EV_A_ &childev);
		701	ev_unref (EV_A); /* child watcher should not keep loop alive */
		702	#endif
481	}	703	}
		704	else
		705	default_loop = 0;
482	}	706	}
483		707
484	return ev_method;	708	return default_loop;
485	}	709	}
486		710
487	/*****************************************************************************/
488
489	void	711	void
490	ev_prefork (void)	712	ev_default_destroy (void)
491	{	713	{
492	/* nop */	714	#if EV_MULTIPLICITY
493	}	715	struct ev_loop *loop = default_loop;
494
495	void
496	ev_postfork_parent (void)
497	{
498	/* nop */
499	}
500
501	void
502	ev_postfork_child (void)
503	{
504	#if EV_USE_EPOLL
505	if (ev_method == EVMETHOD_EPOLL)
506	epoll_postfork_child ();
507	#endif	716	#endif
508		717
		718	ev_ref (EV_A); /* child watcher */
		719	ev_signal_stop (EV_A_ &childev);
		720
		721	ev_ref (EV_A); /* signal watcher */
509	ev_io_stop (&sigev);	722	ev_io_stop (EV_A_ &sigev);
		723
		724	close (sigpipe [0]); sigpipe [0] = 0;
		725	close (sigpipe [1]); sigpipe [1] = 0;
		726
		727	loop_destroy (EV_A);
		728	}
		729
		730	void
		731	ev_default_fork (EV_P)
		732	{
		733	loop_fork (EV_A);
		734
		735	ev_io_stop (EV_A_ &sigev);
510	close (sigpipe [0]);	736	close (sigpipe [0]);
511	close (sigpipe [1]);	737	close (sigpipe [1]);
512	pipe (sigpipe);	738	pipe (sigpipe);
		739
		740	ev_ref (EV_A); /* signal watcher */
513	siginit ();	741	siginit (EV_A);
514	}	742	}
515		743
516	/*****************************************************************************/	744	/*****************************************************************************/
517		745
518	static void	746	static void
519	call_pending (void)	747	call_pending (EV_P)
520	{	748	{
		749	int pri;
		750
		751	for (pri = NUMPRI; pri--; )
521	while (pendingcnt)	752	while (pendingcnt [pri])
522	{	753	{
523	ANPENDING *p = pendings + --pendingcnt;	754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
524		755
525	if (p->w)	756	if (p->w)
526	{	757	{
527	p->w->pending = 0;	758	p->w->pending = 0;
528	p->w->cb (p->w, p->events);	759	p->w->cb (EV_A_ p->w, p->events);
529	}	760	}
530	}	761	}
531	}	762	}
532		763
533	static void	764	static void
534	timers_reify (void)	765	timers_reify (EV_P)
535	{	766	{
536	while (timercnt && timers [0]->at <= now)	767	while (timercnt && timers [0]->at <= mn_now)
537	{	768	{
538	struct ev_timer *w = timers [0];	769	struct ev_timer *w = timers [0];
539		770
540	/* first reschedule or stop timer */	771	/* first reschedule or stop timer */
541	if (w->repeat)	772	if (w->repeat)
542	{	773	{
		774	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
543	w->at = now + w->repeat;	775	w->at = mn_now + w->repeat;
544	assert (("timer timeout in the past, negative repeat?", w->at > now));
545	downheap ((WT *)timers, timercnt, 0);	776	downheap ((WT *)timers, timercnt, 0);
546	}	777	}
547	else	778	else
548	ev_timer_stop (w); /* nonrepeating: stop timer */	779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
549		780
550	event ((W)w, EV_TIMEOUT);	781	event (EV_A_ (W)w, EV_TIMEOUT);
551	}	782	}
552	}	783	}
553		784
554	static void	785	static void
555	periodics_reify (void)	786	periodics_reify (EV_P)
556	{	787	{
557	while (periodiccnt && periodics [0]->at <= ev_now)	788	while (periodiccnt && periodics [0]->at <= rt_now)
558	{	789	{
559	struct ev_periodic *w = periodics [0];	790	struct ev_periodic *w = periodics [0];
560		791
561	/* first reschedule or stop timer */	792	/* first reschedule or stop timer */
562	if (w->interval)	793	if (w->interval)
563	{	794	{
564	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	795	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
565	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	796	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
566	downheap ((WT *)periodics, periodiccnt, 0);	797	downheap ((WT *)periodics, periodiccnt, 0);
567	}	798	}
568	else	799	else
569	ev_periodic_stop (w); /* nonrepeating: stop timer */	800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
570		801
571	event ((W)w, EV_TIMEOUT);	802	event (EV_A_ (W)w, EV_PERIODIC);
572	}	803	}
573	}	804	}
574		805
575	static void	806	static void
576	periodics_reschedule (ev_tstamp diff)	807	periodics_reschedule (EV_P)
577	{	808	{
578	int i;	809	int i;
579		810
580	/* adjust periodics after time jump */	811	/* adjust periodics after time jump */
581	for (i = 0; i < periodiccnt; ++i)	812	for (i = 0; i < periodiccnt; ++i)
582	{	813	{
583	struct ev_periodic *w = periodics [i];	814	struct ev_periodic *w = periodics [i];
584		815
585	if (w->interval)	816	if (w->interval)
586	{	817	{
587	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	818	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
588		819
589	if (fabs (diff) >= 1e-4)	820	if (fabs (diff) >= 1e-4)
590	{	821	{
591	ev_periodic_stop (w);	822	ev_periodic_stop (EV_A_ w);
592	ev_periodic_start (w);	823	ev_periodic_start (EV_A_ w);
593		824
594	i = 0; /* restart loop, inefficient, but time jumps should be rare */	825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
595	}	826	}
596	}	827	}
597	}	828	}
598	}	829	}
599		830
		831	inline int
		832	time_update_monotonic (EV_P)
		833	{
		834	mn_now = get_clock ();
		835
		836	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		837	{
		838	rt_now = rtmn_diff + mn_now;
		839	return 0;
		840	}
		841	else
		842	{
		843	now_floor = mn_now;
		844	rt_now = ev_time ();
		845	return 1;
		846	}
		847	}
		848
600	static void	849	static void
601	time_update (void)	850	time_update (EV_P)
602	{	851	{
603	int i;	852	int i;
604		853
605	ev_now = ev_time ();	854	#if EV_USE_MONOTONIC
606
607	if (have_monotonic)	855	if (expect_true (have_monotonic))
608	{	856	{
609	ev_tstamp odiff = diff;	857	if (time_update_monotonic (EV_A))
610
611	for (i = 4; --i; ) /* loop a few times, before making important decisions */
612	{	858	{
613	now = get_clock ();	859	ev_tstamp odiff = rtmn_diff;
		860
		861	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		862	{
614	diff = ev_now - now;	863	rtmn_diff = rt_now - mn_now;
615		864
616	if (fabs (odiff - diff) < MIN_TIMEJUMP)	865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
617	return; /* all is well */	866	return; /* all is well */
618		867
619	ev_now = ev_time ();	868	rt_now = ev_time ();
		869	mn_now = get_clock ();
		870	now_floor = mn_now;
		871	}
		872
		873	periodics_reschedule (EV_A);
		874	/* no timer adjustment, as the monotonic clock doesn't jump */
		875	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
620	}	876	}
621
622	periodics_reschedule (diff - odiff);
623	/* no timer adjustment, as the monotonic clock doesn't jump */
624	}	877	}
625	else	878	else
		879	#endif
626	{	880	{
627	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	881	rt_now = ev_time ();
		882
		883	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
628	{	884	{
629	periodics_reschedule (ev_now - now);	885	periodics_reschedule (EV_A);
630		886
631	/* adjust timers. this is easy, as the offset is the same for all */	887	/* adjust timers. this is easy, as the offset is the same for all */
632	for (i = 0; i < timercnt; ++i)	888	for (i = 0; i < timercnt; ++i)
633	timers [i]->at += diff;	889	timers [i]->at += rt_now - mn_now;
634	}	890	}
635		891
636	now = ev_now;	892	mn_now = rt_now;
637	}	893	}
638	}	894	}
639		895
640	int ev_loop_done;	896	void
		897	ev_ref (EV_P)
		898	{
		899	++activecnt;
		900	}
641		901
		902	void
		903	ev_unref (EV_P)
		904	{
		905	--activecnt;
		906	}
		907
		908	static int loop_done;
		909
		910	void
642	void ev_loop (int flags)	911	ev_loop (EV_P_ int flags)
643	{	912	{
644	double block;	913	double block;
645	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	914	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
646		915
647	do	916	do
648	{	917	{
649	/* queue check watchers (and execute them) */	918	/* queue check watchers (and execute them) */
650	if (preparecnt)	919	if (expect_false (preparecnt))
651	{	920	{
652	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
653	call_pending ();	922	call_pending (EV_A);
654	}	923	}
655		924
656	/* update fd-related kernel structures */	925	/* update fd-related kernel structures */
657	fd_reify ();	926	fd_reify (EV_A);
658		927
659	/* calculate blocking time */	928	/* calculate blocking time */
660		929
661	/* we only need this for !monotonic clockor timers, but as we basically	930	/* we only need this for !monotonic clockor timers, but as we basically
662	always have timers, we just calculate it always */	931	always have timers, we just calculate it always */
		932	#if EV_USE_MONOTONIC
		933	if (expect_true (have_monotonic))
		934	time_update_monotonic (EV_A);
		935	else
		936	#endif
		937	{
663	ev_now = ev_time ();	938	rt_now = ev_time ();
		939	mn_now = rt_now;
		940	}
664		941
665	if (flags & EVLOOP_NONBLOCK || idlecnt)	942	if (flags & EVLOOP_NONBLOCK || idlecnt)
666	block = 0.;	943	block = 0.;
667	else	944	else
668	{	945	{
669	block = MAX_BLOCKTIME;	946	block = MAX_BLOCKTIME;
670		947
671	if (timercnt)	948	if (timercnt)
672	{	949	{
673	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	950	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
674	if (block > to) block = to;	951	if (block > to) block = to;
675	}	952	}
676		953
677	if (periodiccnt)	954	if (periodiccnt)
678	{	955	{
679	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
680	if (block > to) block = to;	957	if (block > to) block = to;
681	}	958	}
682		959
683	if (block < 0.) block = 0.;	960	if (block < 0.) block = 0.;
684	}	961	}
685		962
686	method_poll (block);	963	method_poll (EV_A_ block);
687		964
688	/* update ev_now, do magic */	965	/* update rt_now, do magic */
689	time_update ();	966	time_update (EV_A);
690		967
691	/* queue pending timers and reschedule them */	968	/* queue pending timers and reschedule them */
692	timers_reify (); /* relative timers called last */	969	timers_reify (EV_A); /* relative timers called last */
693	periodics_reify (); /* absolute timers called first */	970	periodics_reify (EV_A); /* absolute timers called first */
694		971
695	/* queue idle watchers unless io or timers are pending */	972	/* queue idle watchers unless io or timers are pending */
696	if (!pendingcnt)	973	if (!pendingcnt)
697	queue_events ((W *)idles, idlecnt, EV_IDLE);	974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
698		975
699	/* queue check watchers, to be executed first */	976	/* queue check watchers, to be executed first */
700	if (checkcnt)	977	if (checkcnt)
701	queue_events ((W *)checks, checkcnt, EV_CHECK);	978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
702		979
703	call_pending ();	980	call_pending (EV_A);
704	}	981	}
705	while (!ev_loop_done);	982	while (activecnt && !loop_done);
706		983
707	if (ev_loop_done != 2)	984	if (loop_done != 2)
708	ev_loop_done = 0;	985	loop_done = 0;
		986	}
		987
		988	void
		989	ev_unloop (EV_P_ int how)
		990	{
		991	loop_done = how;
709	}	992	}
710		993
711	/*****************************************************************************/	994	/*****************************************************************************/
712		995
713	static void	996	inline void
714	wlist_add (WL *head, WL elem)	997	wlist_add (WL *head, WL elem)
715	{	998	{
716	elem->next = *head;	999	elem->next = *head;
717	*head = elem;	1000	*head = elem;
718	}	1001	}
719		1002
720	static void	1003	inline void
721	wlist_del (WL *head, WL elem)	1004	wlist_del (WL *head, WL elem)
722	{	1005	{
723	while (*head)	1006	while (*head)
724	{	1007	{
725	if (*head == elem)	1008	if (*head == elem)
…		…
730		1013
731	head = &(*head)->next;	1014	head = &(*head)->next;
732	}	1015	}
733	}	1016	}
734		1017
735	static void	1018	inline void
736	ev_clear (W w)	1019	ev_clear_pending (EV_P_ W w)
737	{	1020	{
738	if (w->pending)	1021	if (w->pending)
739	{	1022	{
740	pendings [w->pending - 1].w = 0;	1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;
741	w->pending = 0;	1024	w->pending = 0;
742	}	1025	}
743	}	1026	}
744		1027
745	static void	1028	inline void
746	ev_start (W w, int active)	1029	ev_start (EV_P_ W w, int active)
747	{	1030	{
		1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1033
748	w->active = active;	1034	w->active = active;
		1035	ev_ref (EV_A);
749	}	1036	}
750		1037
751	static void	1038	inline void
752	ev_stop (W w)	1039	ev_stop (EV_P_ W w)
753	{	1040	{
		1041	ev_unref (EV_A);
754	w->active = 0;	1042	w->active = 0;
755	}	1043	}
756		1044
757	/*****************************************************************************/	1045	/*****************************************************************************/
758		1046
759	void	1047	void
760	ev_io_start (struct ev_io *w)	1048	ev_io_start (EV_P_ struct ev_io *w)
761	{	1049	{
		1050	int fd = w->fd;
		1051
762	if (ev_is_active (w))	1052	if (ev_is_active (w))
763	return;	1053	return;
764		1054
765	int fd = w->fd;	1055	assert (("ev_io_start called with negative fd", fd >= 0));
766		1056
767	ev_start ((W)w, 1);	1057	ev_start (EV_A_ (W)w, 1);
768	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
769	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);
770		1060
771	fd_change (fd);	1061	fd_change (EV_A_ fd);
772	}	1062	}
773		1063
774	void	1064	void
775	ev_io_stop (struct ev_io *w)	1065	ev_io_stop (EV_P_ struct ev_io *w)
776	{	1066	{
777	ev_clear ((W)w);	1067	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1068	if (!ev_is_active (w))
779	return;	1069	return;
780		1070
781	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
782	ev_stop ((W)w);	1072	ev_stop (EV_A_ (W)w);
783		1073
784	fd_change (w->fd);	1074	fd_change (EV_A_ w->fd);
785	}	1075	}
786		1076
787	void	1077	void
788	ev_timer_start (struct ev_timer *w)	1078	ev_timer_start (EV_P_ struct ev_timer *w)
789	{	1079	{
790	if (ev_is_active (w))	1080	if (ev_is_active (w))
791	return;	1081	return;
792		1082
793	w->at += now;	1083	w->at += mn_now;
794		1084
795	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1085	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
796		1086
797	ev_start ((W)w, ++timercnt);	1087	ev_start (EV_A_ (W)w, ++timercnt);
798	array_needsize (timers, timermax, timercnt, );	1088	array_needsize (timers, timermax, timercnt, );
799	timers [timercnt - 1] = w;	1089	timers [timercnt - 1] = w;
800	upheap ((WT *)timers, timercnt - 1);	1090	upheap ((WT *)timers, timercnt - 1);
801	}	1091	}
802		1092
803	void	1093	void
804	ev_timer_stop (struct ev_timer *w)	1094	ev_timer_stop (EV_P_ struct ev_timer *w)
805	{	1095	{
806	ev_clear ((W)w);	1096	ev_clear_pending (EV_A_ (W)w);
807	if (!ev_is_active (w))	1097	if (!ev_is_active (w))
808	return;	1098	return;
809		1099
810	if (w->active < timercnt--)	1100	if (w->active < timercnt--)
811	{	1101	{
…		…
813	downheap ((WT *)timers, timercnt, w->active - 1);	1103	downheap ((WT *)timers, timercnt, w->active - 1);
814	}	1104	}
815		1105
816	w->at = w->repeat;	1106	w->at = w->repeat;
817		1107
818	ev_stop ((W)w);	1108	ev_stop (EV_A_ (W)w);
819	}	1109	}
820		1110
821	void	1111	void
822	ev_timer_again (struct ev_timer *w)	1112	ev_timer_again (EV_P_ struct ev_timer *w)
823	{	1113	{
824	if (ev_is_active (w))	1114	if (ev_is_active (w))
825	{	1115	{
826	if (w->repeat)	1116	if (w->repeat)
827	{	1117	{
828	w->at = now + w->repeat;	1118	w->at = mn_now + w->repeat;
829	downheap ((WT *)timers, timercnt, w->active - 1);	1119	downheap ((WT *)timers, timercnt, w->active - 1);
830	}	1120	}
831	else	1121	else
832	ev_timer_stop (w);	1122	ev_timer_stop (EV_A_ w);
833	}	1123	}
834	else if (w->repeat)	1124	else if (w->repeat)
835	ev_timer_start (w);	1125	ev_timer_start (EV_A_ w);
836	}	1126	}
837		1127
838	void	1128	void
839	ev_periodic_start (struct ev_periodic *w)	1129	ev_periodic_start (EV_P_ struct ev_periodic *w)
840	{	1130	{
841	if (ev_is_active (w))	1131	if (ev_is_active (w))
842	return;	1132	return;
843		1133
844	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1134	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
845		1135
846	/* this formula differs from the one in periodic_reify because we do not always round up */	1136	/* this formula differs from the one in periodic_reify because we do not always round up */
847	if (w->interval)	1137	if (w->interval)
848	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
849		1139
850	ev_start ((W)w, ++periodiccnt);	1140	ev_start (EV_A_ (W)w, ++periodiccnt);
851	array_needsize (periodics, periodicmax, periodiccnt, );	1141	array_needsize (periodics, periodicmax, periodiccnt, );
852	periodics [periodiccnt - 1] = w;	1142	periodics [periodiccnt - 1] = w;
853	upheap ((WT *)periodics, periodiccnt - 1);	1143	upheap ((WT *)periodics, periodiccnt - 1);
854	}	1144	}
855		1145
856	void	1146	void
857	ev_periodic_stop (struct ev_periodic *w)	1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)
858	{	1148	{
859	ev_clear ((W)w);	1149	ev_clear_pending (EV_A_ (W)w);
860	if (!ev_is_active (w))	1150	if (!ev_is_active (w))
861	return;	1151	return;
862		1152
863	if (w->active < periodiccnt--)	1153	if (w->active < periodiccnt--)
864	{	1154	{
865	periodics [w->active - 1] = periodics [periodiccnt];	1155	periodics [w->active - 1] = periodics [periodiccnt];
866	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);
867	}	1157	}
868		1158
869	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
870	}	1160	}
871		1161
872	void	1162	void
873	ev_signal_start (struct ev_signal *w)	1163	ev_idle_start (EV_P_ struct ev_idle *w)
874	{	1164	{
875	if (ev_is_active (w))	1165	if (ev_is_active (w))
876	return;	1166	return;
877		1167
		1168	ev_start (EV_A_ (W)w, ++idlecnt);
		1169	array_needsize (idles, idlemax, idlecnt, );
		1170	idles [idlecnt - 1] = w;
		1171	}
		1172
		1173	void
		1174	ev_idle_stop (EV_P_ struct ev_idle *w)
		1175	{
		1176	ev_clear_pending (EV_A_ (W)w);
		1177	if (ev_is_active (w))
		1178	return;
		1179
		1180	idles [w->active - 1] = idles [--idlecnt];
		1181	ev_stop (EV_A_ (W)w);
		1182	}
		1183
		1184	void
		1185	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1186	{
		1187	if (ev_is_active (w))
		1188	return;
		1189
		1190	ev_start (EV_A_ (W)w, ++preparecnt);
		1191	array_needsize (prepares, preparemax, preparecnt, );
		1192	prepares [preparecnt - 1] = w;
		1193	}
		1194
		1195	void
		1196	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1197	{
		1198	ev_clear_pending (EV_A_ (W)w);
		1199	if (ev_is_active (w))
		1200	return;
		1201
		1202	prepares [w->active - 1] = prepares [--preparecnt];
		1203	ev_stop (EV_A_ (W)w);
		1204	}
		1205
		1206	void
		1207	ev_check_start (EV_P_ struct ev_check *w)
		1208	{
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	ev_start (EV_A_ (W)w, ++checkcnt);
		1213	array_needsize (checks, checkmax, checkcnt, );
		1214	checks [checkcnt - 1] = w;
		1215	}
		1216
		1217	void
		1218	ev_check_stop (EV_P_ struct ev_check *w)
		1219	{
		1220	ev_clear_pending (EV_A_ (W)w);
		1221	if (ev_is_active (w))
		1222	return;
		1223
		1224	checks [w->active - 1] = checks [--checkcnt];
		1225	ev_stop (EV_A_ (W)w);
		1226	}
		1227
		1228	#ifndef SA_RESTART
		1229	# define SA_RESTART 0
		1230	#endif
		1231
		1232	void
		1233	ev_signal_start (EV_P_ struct ev_signal *w)
		1234	{
		1235	#if EV_MULTIPLICITY
		1236	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1237	#endif
		1238	if (ev_is_active (w))
		1239	return;
		1240
		1241	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1242
878	ev_start ((W)w, 1);	1243	ev_start (EV_A_ (W)w, 1);
879	array_needsize (signals, signalmax, w->signum, signals_init);	1244	array_needsize (signals, signalmax, w->signum, signals_init);
880	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
881		1246
882	if (!w->next)	1247	if (!w->next)
883	{	1248	{
884	struct sigaction sa;	1249	struct sigaction sa;
885	sa.sa_handler = sighandler;	1250	sa.sa_handler = sighandler;
886	sigfillset (&sa.sa_mask);	1251	sigfillset (&sa.sa_mask);
887	sa.sa_flags = 0;	1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
888	sigaction (w->signum, &sa, 0);	1253	sigaction (w->signum, &sa, 0);
889	}	1254	}
890	}	1255	}
891		1256
892	void	1257	void
893	ev_signal_stop (struct ev_signal *w)	1258	ev_signal_stop (EV_P_ struct ev_signal *w)
894	{	1259	{
895	ev_clear ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
896	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
897	return;	1262	return;
898		1263
899	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
900	ev_stop ((W)w);	1265	ev_stop (EV_A_ (W)w);
901		1266
902	if (!signals [w->signum - 1].head)	1267	if (!signals [w->signum - 1].head)
903	signal (w->signum, SIG_DFL);	1268	signal (w->signum, SIG_DFL);
904	}	1269	}
905		1270
906	void	1271	void
907	ev_idle_start (struct ev_idle *w)	1272	ev_child_start (EV_P_ struct ev_child *w)
908	{	1273	{
		1274	#if EV_MULTIPLICITY
		1275	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1276	#endif
909	if (ev_is_active (w))	1277	if (ev_is_active (w))
910	return;	1278	return;
911		1279
912	ev_start ((W)w, ++idlecnt);	1280	ev_start (EV_A_ (W)w, 1);
913	array_needsize (idles, idlemax, idlecnt, );	1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
914	idles [idlecnt - 1] = w;
915	}	1282	}
916		1283
917	void	1284	void
918	ev_idle_stop (struct ev_idle *w)	1285	ev_child_stop (EV_P_ struct ev_child *w)
919	{	1286	{
920	ev_clear ((W)w);	1287	ev_clear_pending (EV_A_ (W)w);
921	if (ev_is_active (w))	1288	if (ev_is_active (w))
922	return;	1289	return;
923		1290
924	idles [w->active - 1] = idles [--idlecnt];
925	ev_stop ((W)w);
926	}
927
928	void
929	ev_prepare_start (struct ev_prepare *w)
930	{
931	if (ev_is_active (w))
932	return;
933
934	ev_start ((W)w, ++preparecnt);
935	array_needsize (prepares, preparemax, preparecnt, );
936	prepares [preparecnt - 1] = w;
937	}
938
939	void
940	ev_prepare_stop (struct ev_prepare *w)
941	{
942	ev_clear ((W)w);
943	if (ev_is_active (w))
944	return;
945
946	prepares [w->active - 1] = prepares [--preparecnt];
947	ev_stop ((W)w);
948	}
949
950	void
951	ev_check_start (struct ev_check *w)
952	{
953	if (ev_is_active (w))
954	return;
955
956	ev_start ((W)w, ++checkcnt);
957	array_needsize (checks, checkmax, checkcnt, );
958	checks [checkcnt - 1] = w;
959	}
960
961	void
962	ev_check_stop (struct ev_check *w)
963	{
964	ev_clear ((W)w);
965	if (ev_is_active (w))
966	return;
967
968	checks [w->active - 1] = checks [--checkcnt];
969	ev_stop ((W)w);
970	}
971
972	void
973	ev_child_start (struct ev_child *w)
974	{
975	if (ev_is_active (w))
976	return;
977
978	ev_start ((W)w, 1);
979	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	}
981
982	void
983	ev_child_stop (struct ev_child *w)
984	{
985	ev_clear ((W)w);
986	if (ev_is_active (w))
987	return;
988
989	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	1292	ev_stop (EV_A_ (W)w);
991	}	1293	}
992		1294
993	/*****************************************************************************/	1295	/*****************************************************************************/
994		1296
995	struct ev_once	1297	struct ev_once
…		…
999	void (*cb)(int revents, void *arg);	1301	void (*cb)(int revents, void *arg);
1000	void *arg;	1302	void *arg;
1001	};	1303	};
1002		1304
1003	static void	1305	static void
1004	once_cb (struct ev_once *once, int revents)	1306	once_cb (EV_P_ struct ev_once *once, int revents)
1005	{	1307	{
1006	void (*cb)(int revents, void *arg) = once->cb;	1308	void (*cb)(int revents, void *arg) = once->cb;
1007	void *arg = once->arg;	1309	void *arg = once->arg;
1008		1310
1009	ev_io_stop (&once->io);	1311	ev_io_stop (EV_A_ &once->io);
1010	ev_timer_stop (&once->to);	1312	ev_timer_stop (EV_A_ &once->to);
1011	free (once);	1313	free (once);
1012		1314
1013	cb (revents, arg);	1315	cb (revents, arg);
1014	}	1316	}
1015		1317
1016	static void	1318	static void
1017	once_cb_io (struct ev_io *w, int revents)	1319	once_cb_io (EV_P_ struct ev_io *w, int revents)
1018	{	1320	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1321	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1020	}	1322	}
1021		1323
1022	static void	1324	static void
1023	once_cb_to (struct ev_timer *w, int revents)	1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1024	{	1326	{
1025	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1327	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1026	}	1328	}
1027		1329
1028	void	1330	void
1029	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1331	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1030	{	1332	{
1031	struct ev_once *once = malloc (sizeof (struct ev_once));	1333	struct ev_once *once = malloc (sizeof (struct ev_once));
1032		1334
1033	if (!once)	1335	if (!once)
1034	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1336	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1039		1341
1040	ev_watcher_init (&once->io, once_cb_io);	1342	ev_watcher_init (&once->io, once_cb_io);
1041	if (fd >= 0)	1343	if (fd >= 0)
1042	{	1344	{
1043	ev_io_set (&once->io, fd, events);	1345	ev_io_set (&once->io, fd, events);
1044	ev_io_start (&once->io);	1346	ev_io_start (EV_A_ &once->io);
1045	}	1347	}
1046		1348
1047	ev_watcher_init (&once->to, once_cb_to);	1349	ev_watcher_init (&once->to, once_cb_to);
1048	if (timeout >= 0.)	1350	if (timeout >= 0.)
1049	{	1351	{
1050	ev_timer_set (&once->to, timeout, 0.);	1352	ev_timer_set (&once->to, timeout, 0.);
1051	ev_timer_start (&once->to);	1353	ev_timer_start (EV_A_ &once->to);
1052	}	1354	}
1053	}	1355	}
1054	}	1356	}
1055		1357
1056	/*****************************************************************************/
1057
1058	#if 0
1059
1060	struct ev_io wio;
1061
1062	static void
1063	sin_cb (struct ev_io *w, int revents)
1064	{
1065	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1066	}
1067
1068	static void
1069	ocb (struct ev_timer *w, int revents)
1070	{
1071	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1072	ev_timer_stop (w);
1073	ev_timer_start (w);
1074	}
1075
1076	static void
1077	scb (struct ev_signal *w, int revents)
1078	{
1079	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1080	ev_io_stop (&wio);
1081	ev_io_start (&wio);
1082	}
1083
1084	static void
1085	gcb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "generic %x\n", revents);
1088
1089	}
1090
1091	int main (void)
1092	{
1093	ev_init (0);
1094
1095	ev_io_init (&wio, sin_cb, 0, EV_READ);
1096	ev_io_start (&wio);
1097
1098	struct ev_timer t[10000];
1099
1100	#if 0
1101	int i;
1102	for (i = 0; i < 10000; ++i)
1103	{
1104	struct ev_timer *w = t + i;
1105	ev_watcher_init (w, ocb, i);
1106	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1107	ev_timer_start (w);
1108	if (drand48 () < 0.5)
1109	ev_timer_stop (w);
1110	}
1111	#endif
1112
1113	struct ev_timer t1;
1114	ev_timer_init (&t1, ocb, 5, 10);
1115	ev_timer_start (&t1);
1116
1117	struct ev_signal sig;
1118	ev_signal_init (&sig, scb, SIGQUIT);
1119	ev_signal_start (&sig);
1120
1121	struct ev_check cw;
1122	ev_check_init (&cw, gcb);
1123	ev_check_start (&cw);
1124
1125	struct ev_idle iw;
1126	ev_idle_init (&iw, gcb);
1127	ev_idle_start (&iw);
1128
1129	ev_loop (0);
1130
1131	return 0;
1132	}
1133
1134	#endif
1135
1136
1137
1138

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