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

Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (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
29	* 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.
30	*/	30	*/
31	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
32	# 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
33	#endif	55	#endif
34		56
35	#include <math.h>	57	#include <math.h>
36	#include <stdlib.h>	58	#include <stdlib.h>
37	#include <unistd.h>	59	#include <unistd.h>
…		…
42	#include <stdio.h>	64	#include <stdio.h>
43		65
44	#include <assert.h>	66	#include <assert.h>
45	#include <errno.h>	67	#include <errno.h>
46	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
47	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
48	#include <sys/time.h>	72	#include <sys/time.h>
49	#include <time.h>	73	#include <time.h>
50		74
		75	/**/
		76
51	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
54	# endif
55	#endif	79	#endif
56		80
57	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
59	#endif	83	#endif
60		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
61	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
63	#endif	91	#endif
64		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
65	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
67	#endif	119	#endif
68	#ifndef EV_USE_REALTIME	120
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
70	#endif
71		122
72	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
73	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
74	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
75	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
76		127
77	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
78		143
79	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
82		147
83	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
84	ev_tstamp ev_now;
85	int ev_method;
86
87	static int have_monotonic; /* runtime */
88
89	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
90	static void (*method_modify)(int fd, int oev, int nev);
91	static void (*method_poll)(ev_tstamp timeout);
92		149
93	/*****************************************************************************/	150	/*****************************************************************************/
94		151
95	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
96	ev_time (void)	186	ev_time (void)
97	{	187	{
98	#if EV_USE_REALTIME	188	#if EV_USE_REALTIME
99	struct timespec ts;	189	struct timespec ts;
100	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
…		…
104	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	196	#endif
107	}	197	}
108		198
109	static ev_tstamp	199	inline ev_tstamp
110	get_clock (void)	200	get_clock (void)
111	{	201	{
112	#if EV_USE_MONOTONIC	202	#if EV_USE_MONOTONIC
113	if (have_monotonic)	203	if (expect_true (have_monotonic))
114	{	204	{
115	struct timespec ts;	205	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	208	}
119	#endif	209	#endif
120		210
121	return ev_time ();	211	return ev_time ();
122	}	212	}
123		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
124	#define array_roundsize(base,n) ((n) \| 4 & ~3)	220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
125		221
126	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
127	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
128	{ \	224	{ \
129	int newcnt = cur; \	225	int newcnt = cur; \
130	do \	226	do \
131	{ \	227	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	228	newcnt = array_roundsize (base, newcnt << 1); \
…		…
138	cur = newcnt; \	234	cur = newcnt; \
139	}	235	}
140		236
141	/*****************************************************************************/	237	/*****************************************************************************/
142		238
143	typedef struct
144	{
145	struct ev_io *head;
146	unsigned char events;
147	unsigned char reify;
148	} ANFD;
149
150	static ANFD *anfds;
151	static int anfdmax;
152
153	static void	239	static void
154	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
155	{	241	{
156	while (count--)	242	while (count--)
157	{	243	{
…		…
161		247
162	++base;	248	++base;
163	}	249	}
164	}	250	}
165		251
166	typedef struct
167	{
168	W w;
169	int events;
170	} ANPENDING;
171
172	static ANPENDING *pendings;
173	static int pendingmax, pendingcnt;
174
175	static void	252	static void
176	event (W w, int events)	253	event (EV_P_ W w, int events)
177	{	254	{
178	if (w->pending)	255	if (w->pending)
179	{	256	{
180	pendings [w->pending - 1].events \|= events;	257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
181	return;	258	return;
182	}	259	}
183		260
184	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
186	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
187	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
188	}	265	}
189		266
190	static void	267	static void
191	queue_events (W *events, int eventcnt, int type)	268	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	269	{
193	int i;	270	int i;
194		271
195	for (i = 0; i < eventcnt; ++i)	272	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	273	event (EV_A_ events [i], type);
197	}	274	}
198		275
199	static void	276	static void
200	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
201	{	278	{
202	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	280	struct ev_io *w;
204		281
205	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
206	{	283	{
207	int ev = w->events & events;	284	int ev = w->events & events;
208		285
209	if (ev)	286	if (ev)
210	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
211	}	288	}
212	}	289	}
213		290
214	/*****************************************************************************/	291	/*****************************************************************************/
215		292
216	static int *fdchanges;
217	static int fdchangemax, fdchangecnt;
218
219	static void	293	static void
220	fd_reify (void)	294	fd_reify (EV_P)
221	{	295	{
222	int i;	296	int i;
223		297
224	for (i = 0; i < fdchangecnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
225	{	299	{
…		…
227	ANFD *anfd = anfds + fd;	301	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	302	struct ev_io *w;
229		303
230	int events = 0;	304	int events = 0;
231		305
232	for (w = anfd->head; w; w = w->next)	306	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
233	events \|= w->events;	307	events \|= w->events;
234		308
235	anfd->reify = 0;	309	anfd->reify = 0;
236		310
237	if (anfd->events != events)
238	{
239	method_modify (fd, anfd->events, events);	311	method_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	312	anfd->events = events;
241	}
242	}	313	}
243		314
244	fdchangecnt = 0;	315	fdchangecnt = 0;
245	}	316	}
246		317
247	static void	318	static void
248	fd_change (int fd)	319	fd_change (EV_P_ int fd)
249	{	320	{
250	if (anfds [fd].reify \|\| fdchangecnt < 0)	321	if (anfds [fd].reify \|\| fdchangecnt < 0)
251	return;	322	return;
252		323
253	anfds [fd].reify = 1;	324	anfds [fd].reify = 1;
…		…
255	++fdchangecnt;	326	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
257	fdchanges [fdchangecnt - 1] = fd;	328	fdchanges [fdchangecnt - 1] = fd;
258	}	329	}
259		330
		331	static void
		332	fd_kill (EV_P_ int fd)
		333	{
		334	struct ev_io *w;
		335
		336	while ((w = (struct ev_io *)anfds [fd].head))
		337	{
		338	ev_io_stop (EV_A_ w);
		339	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		340	}
		341	}
		342
260	/* called on EBADF to verify fds */	343	/* called on EBADF to verify fds */
261	static void	344	static void
262	fd_recheck (void)	345	fd_ebadf (EV_P)
263	{	346	{
264	int fd;	347	int fd;
265		348
266	for (fd = 0; fd < anfdmax; ++fd)	349	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	350	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
269	while (anfds [fd].head)	352	fd_kill (EV_A_ fd);
		353	}
		354
		355	/* called on ENOMEM in select/poll to kill some fds and retry */
		356	static void
		357	fd_enomem (EV_P)
		358	{
		359	int fd;
		360
		361	for (fd = anfdmax; fd--; )
		362	if (anfds [fd].events)
270	{	363	{
271	ev_io_stop (anfds [fd].head);	364	close (fd);
272	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	365	fd_kill (EV_A_ fd);
		366	return;
273	}	367	}
		368	}
		369
		370	/* susually called after fork if method needs to re-arm all fds from scratch */
		371	static void
		372	fd_rearm_all (EV_P)
		373	{
		374	int fd;
		375
		376	/* this should be highly optimised to not do anything but set a flag */
		377	for (fd = 0; fd < anfdmax; ++fd)
		378	if (anfds [fd].events)
		379	{
		380	anfds [fd].events = 0;
		381	fd_change (EV_A_ fd);
		382	}
274	}	383	}
275		384
276	/*****************************************************************************/	385	/*****************************************************************************/
277		386
278	static struct ev_timer **timers;
279	static int timermax, timercnt;
280
281	static struct ev_periodic **periodics;
282	static int periodicmax, periodiccnt;
283
284	static void	387	static void
285	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
286	{	389	{
287	WT w = timers [k];	390	WT w = heap [k];
288		391
289	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
290	{	393	{
291	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
293	k >>= 1;	396	k >>= 1;
294	}	397	}
295		398
296	timers [k] = w;	399	heap [k] = w;
297	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
298		401
299	}	402	}
300		403
301	static void	404	static void
302	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
303	{	406	{
304	WT w = timers [k];	407	WT w = heap [k];
305		408
306	while (k < (N >> 1))	409	while (k < (N >> 1))
307	{	410	{
308	int j = k << 1;	411	int j = k << 1;
309		412
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	414	++j;
312		415
313	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
314	break;	417	break;
315		418
316	timers [k] = timers [j];	419	heap [k] = heap [j];
317	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
318	k = j;	421	k = j;
319	}	422	}
320		423
321	timers [k] = w;	424	heap [k] = w;
322	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
323	}	426	}
324		427
325	/*****************************************************************************/	428	/*****************************************************************************/
326		429
327	typedef struct	430	typedef struct
328	{	431	{
329	struct ev_signal *head;	432	struct ev_watcher_list *head;
330	sig_atomic_t volatile gotsig;	433	sig_atomic_t volatile gotsig;
331	} ANSIG;	434	} ANSIG;
332		435
333	static ANSIG *signals;	436	static ANSIG *signals;
334	static int signalmax;	437	static int signalmax;
…		…
354	{	457	{
355	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
356		459
357	if (!gotsig)	460	if (!gotsig)
358	{	461	{
		462	int old_errno = errno;
359	gotsig = 1;	463	gotsig = 1;
360	write (sigpipe [1], &signum, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
361	}	466	}
362	}	467	}
363		468
364	static void	469	static void
365	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
366	{	471	{
367	struct ev_signal *w;	472	struct ev_watcher_list *w;
368	int sig;	473	int signum;
369		474
370	read (sigpipe [0], &revents, 1);	475	read (sigpipe [0], &revents, 1);
371	gotsig = 0;	476	gotsig = 0;
372		477
373	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
375	{	480	{
376	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
377		482
378	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
380	}	485	}
381	}	486	}
382		487
383	static void	488	static void
384	siginit (void)	489	siginit (EV_P)
385	{	490	{
		491	#ifndef WIN32
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388		494
389	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
392		499
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	503	}
396		504
397	/*****************************************************************************/	505	/*****************************************************************************/
398		506
399	static struct ev_idle **idles;	507	#ifndef WIN32
400	static int idlemax, idlecnt;
401
402	static struct ev_prepare **prepares;
403	static int preparemax, preparecnt;
404
405	static struct ev_check **checks;
406	static int checkmax, checkcnt;
407
408	/*****************************************************************************/
409		508
410	static struct ev_child *childs [PID_HASHSIZE];	509	static struct ev_child *childs [PID_HASHSIZE];
411	static struct ev_signal childev;	510	static struct ev_signal childev;
412		511
413	#ifndef WCONTINUED	512	#ifndef WCONTINUED
414	# define WCONTINUED 0	513	# define WCONTINUED 0
415	#endif	514	#endif
416		515
417	static void	516	static void
418	childcb (struct ev_signal *sw, int revents)	517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
419	{	518	{
420	struct ev_child *w;	519	struct ev_child *w;
		520
		521	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		522	if (w->pid == pid \|\| !w->pid)
		523	{
		524	ev_priority (w) = ev_priority (sw); /* need to do it now */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
421	int pid, status;	534	int pid, status;
422		535
423	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	536	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	537	{
425	if (w->pid == pid \|\| w->pid == -1)	538	/* make sure we are called again until all childs have been reaped */
426	{	539	event (EV_A_ (W)sw, EV_SIGNAL);
427	w->status = status;	540
428	event ((W)w, EV_CHILD);	541	child_reap (EV_A_ sw, pid, pid, status);
429	}	542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
430	}	544	}
		545
		546	#endif
431		547
432	/*****************************************************************************/	548	/*****************************************************************************/
433		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
434	#if EV_USE_EPOLL	553	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	554	# include "ev_epoll.c"
436	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
437	#if EV_USE_SELECT	559	#if EV_USE_SELECT
438	# include "ev_select.c"	560	# include "ev_select.c"
439	#endif	561	#endif
440		562
441	int	563	int
…		…
448	ev_version_minor (void)	570	ev_version_minor (void)
449	{	571	{
450	return EV_VERSION_MINOR;	572	return EV_VERSION_MINOR;
451	}	573	}
452		574
453	int ev_init (int flags)	575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
454	{	578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	\|\| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	static void
		594	loop_init (EV_P_ int methods)
		595	{
455	if (!ev_method)	596	if (!method)
456	{	597	{
457	#if EV_USE_MONOTONIC	598	#if EV_USE_MONOTONIC
458	{	599	{
459	struct timespec ts;	600	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	602	have_monotonic = 1;
462	}	603	}
463	#endif	604	#endif
464		605
465	ev_now = ev_time ();	606	rt_now = ev_time ();
466	now = get_clock ();	607	mn_now = get_clock ();
		608	now_floor = mn_now;
467	diff = ev_now - now;	609	rtmn_diff = rt_now - mn_now;
468		610
469	if (pipe (sigpipe))	611	if (methods == EVMETHOD_AUTO)
470	return 0;	612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
471		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
472	ev_method = EVMETHOD_NONE;	615	methods = EVMETHOD_ANY;
		616
		617	method = 0;
		618	#if EV_USE_WIN32
		619	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		620	#endif
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
473	#if EV_USE_EPOLL	624	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
475	#endif	629	#endif
476	#if EV_USE_SELECT	630	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
478	#endif	632	#endif
		633	}
		634	}
479		635
		636	void
		637	loop_destroy (EV_P)
		638	{
		639	#if EV_USE_WIN32
		640	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		647	#endif
		648	#if EV_USE_POLL
		649	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		653	#endif
		654
		655	method = 0;
		656	/TODO/
		657	}
		658
		659	void
		660	loop_fork (EV_P)
		661	{
		662	/TODO/
		663	#if EV_USE_EPOLL
		664	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		665	#endif
		666	#if EV_USE_KQUEUE
		667	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		668	#endif
		669	}
		670
		671	#if EV_MULTIPLICITY
		672	struct ev_loop *
		673	ev_loop_new (int methods)
		674	{
		675	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		676
		677	loop_init (EV_A_ methods);
		678
		679	if (ev_method (EV_A))
		680	return loop;
		681
		682	return 0;
		683	}
		684
		685	void
		686	ev_loop_destroy (EV_P)
		687	{
		688	loop_destroy (EV_A);
		689	free (loop);
		690	}
		691
		692	void
		693	ev_loop_fork (EV_P)
		694	{
		695	loop_fork (EV_A);
		696	}
		697
		698	#endif
		699
		700	#if EV_MULTIPLICITY
		701	struct ev_loop default_loop_struct;
		702	static struct ev_loop *default_loop;
		703
		704	struct ev_loop *
		705	#else
		706	static int default_loop;
		707
		708	int
		709	#endif
		710	ev_default_loop (int methods)
		711	{
		712	if (sigpipe [0] == sigpipe [1])
		713	if (pipe (sigpipe))
		714	return 0;
		715
		716	if (!default_loop)
		717	{
		718	#if EV_MULTIPLICITY
		719	struct ev_loop *loop = default_loop = &default_loop_struct;
		720	#else
		721	default_loop = 1;
		722	#endif
		723
		724	loop_init (EV_A_ methods);
		725
480	if (ev_method)	726	if (ev_method (EV_A))
481	{	727	{
482	ev_watcher_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
483	siginit ();	730	siginit (EV_A);
484		731
		732	#ifndef WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	733	ev_signal_init (&childev, childcb, SIGCHLD);
		734	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	735	ev_signal_start (EV_A_ &childev);
		736	ev_unref (EV_A); /* child watcher should not keep loop alive */
		737	#endif
487	}	738	}
		739	else
		740	default_loop = 0;
488	}	741	}
489		742
490	return ev_method;	743	return default_loop;
491	}	744	}
492		745
493	/*****************************************************************************/
494
495	void	746	void
496	ev_fork_prepare (void)	747	ev_default_destroy (void)
497	{	748	{
498	/* nop */	749	#if EV_MULTIPLICITY
499	}	750	struct ev_loop *loop = default_loop;
500
501	void
502	ev_fork_parent (void)
503	{
504	/* nop */
505	}
506
507	void
508	ev_fork_child (void)
509	{
510	#if EV_USE_EPOLL
511	if (ev_method == EVMETHOD_EPOLL)
512	epoll_postfork_child ();
513	#endif	751	#endif
514		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
515	ev_io_stop (&sigev);	757	ev_io_stop (EV_A_ &sigev);
		758
		759	close (sigpipe [0]); sigpipe [0] = 0;
		760	close (sigpipe [1]); sigpipe [1] = 0;
		761
		762	loop_destroy (EV_A);
		763	}
		764
		765	void
		766	ev_default_fork (void)
		767	{
		768	#if EV_MULTIPLICITY
		769	struct ev_loop *loop = default_loop;
		770	#endif
		771
		772	loop_fork (EV_A);
		773
		774	ev_io_stop (EV_A_ &sigev);
516	close (sigpipe [0]);	775	close (sigpipe [0]);
517	close (sigpipe [1]);	776	close (sigpipe [1]);
518	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
519	siginit ();	780	siginit (EV_A);
520	}	781	}
521		782
522	/*****************************************************************************/	783	/*****************************************************************************/
523		784
524	static void	785	static void
525	call_pending (void)	786	call_pending (EV_P)
526	{	787	{
		788	int pri;
		789
		790	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	791	while (pendingcnt [pri])
528	{	792	{
529	ANPENDING *p = pendings + --pendingcnt;	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		794
531	if (p->w)	795	if (p->w)
532	{	796	{
533	p->w->pending = 0;	797	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	798
		799	((void (*)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
535	}	800	}
536	}	801	}
537	}	802	}
538		803
539	static void	804	static void
540	timers_reify (void)	805	timers_reify (EV_P)
541	{	806	{
542	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
543	{	808	{
544	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
		810
		811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
545		812
546	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
547	if (w->repeat)	814	if (w->repeat)
548	{	815	{
549	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
550	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
551	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
552	}	819	}
553	else	820	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		822
556	event ((W)w, EV_TIMEOUT);	823	event (EV_A_ (W)w, EV_TIMEOUT);
557	}	824	}
558	}	825	}
559		826
560	static void	827	static void
561	periodics_reify (void)	828	periodics_reify (EV_P)
562	{	829	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
564	{	831	{
565	struct ev_periodic *w = periodics [0];	832	struct ev_periodic *w = periodics [0];
		833
		834	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
566		835
567	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
568	if (w->interval)	837	if (w->interval)
569	{	838	{
570	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	839	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
571	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	840	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
572	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
573	}	842	}
574	else	843	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		845
577	event ((W)w, EV_PERIODIC);	846	event (EV_A_ (W)w, EV_PERIODIC);
578	}	847	}
579	}	848	}
580		849
581	static void	850	static void
582	periodics_reschedule (ev_tstamp diff)	851	periodics_reschedule (EV_P)
583	{	852	{
584	int i;	853	int i;
585		854
586	/* adjust periodics after time jump */	855	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
588	{	857	{
589	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
590		859
591	if (w->interval)	860	if (w->interval)
592	{	861	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	862	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
594		863
595	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
596	{	865	{
597	ev_periodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
598	ev_periodic_start (w);	867	ev_periodic_start (EV_A_ w);
599		868
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	870	}
602	}	871	}
603	}	872	}
604	}	873	}
605		874
		875	inline int
		876	time_update_monotonic (EV_P)
		877	{
		878	mn_now = get_clock ();
		879
		880	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		881	{
		882	rt_now = rtmn_diff + mn_now;
		883	return 0;
		884	}
		885	else
		886	{
		887	now_floor = mn_now;
		888	rt_now = ev_time ();
		889	return 1;
		890	}
		891	}
		892
606	static void	893	static void
607	time_update (void)	894	time_update (EV_P)
608	{	895	{
609	int i;	896	int i;
610		897
611	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	899	if (expect_true (have_monotonic))
614	{	900	{
615	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	902	{
619	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
620	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
621		908
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	910	return; /* all is well */
624		911
625	ev_now = ev_time ();	912	rt_now = ev_time ();
		913	mn_now = get_clock ();
		914	now_floor = mn_now;
		915	}
		916
		917	periodics_reschedule (EV_A);
		918	/* no timer adjustment, as the monotonic clock doesn't jump */
		919	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
626	}	920	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}	921	}
631	else	922	else
		923	#endif
632	{	924	{
633	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	925	rt_now = ev_time ();
		926
		927	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
634	{	928	{
635	periodics_reschedule (ev_now - now);	929	periodics_reschedule (EV_A);
636		930
637	/* adjust timers. this is easy, as the offset is the same for all */	931	/* adjust timers. this is easy, as the offset is the same for all */
638	for (i = 0; i < timercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	933	((WT)timers [i])->at += rt_now - mn_now;
640	}	934	}
641		935
642	now = ev_now;	936	mn_now = rt_now;
643	}	937	}
644	}	938	}
645		939
646	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
647		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
648	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
649	{	956	{
650	double block;	957	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	958	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
652		959
653	do	960	do
654	{	961	{
655	/* queue check watchers (and execute them) */	962	/* queue check watchers (and execute them) */
656	if (preparecnt)	963	if (expect_false (preparecnt))
657	{	964	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	966	call_pending (EV_A);
660	}	967	}
661		968
662	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
663	fd_reify ();	970	fd_reify (EV_A);
664		971
665	/* calculate blocking time */	972	/* calculate blocking time */
666		973
667	/* we only need this for !monotonic clockor timers, but as we basically	974	/* we only need this for !monotonic clockor timers, but as we basically
668	always have timers, we just calculate it always */	975	always have timers, we just calculate it always */
		976	#if EV_USE_MONOTONIC
		977	if (expect_true (have_monotonic))
		978	time_update_monotonic (EV_A);
		979	else
		980	#endif
		981	{
669	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
670		985
671	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	986	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
672	block = 0.;	987	block = 0.;
673	else	988	else
674	{	989	{
675	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
676		991
677	if (timercnt)	992	if (timercnt)
678	{	993	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	994	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
680	if (block > to) block = to;	995	if (block > to) block = to;
681	}	996	}
682		997
683	if (periodiccnt)	998	if (periodiccnt)
684	{	999	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
686	if (block > to) block = to;	1001	if (block > to) block = to;
687	}	1002	}
688		1003
689	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
690	}	1005	}
691		1006
692	method_poll (block);	1007	method_poll (EV_A_ block);
693		1008
694	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
695	time_update ();	1010	time_update (EV_A);
696		1011
697	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	1013	timers_reify (EV_A); /* relative timers called last */
699	periodics_reify (); /* absolute timers called first */	1014	periodics_reify (EV_A); /* absolute timers called first */
700		1015
701	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
702	if (!pendingcnt)	1017	if (!pendingcnt)
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		1019
705	/* queue check watchers, to be executed first */	1020	/* queue check watchers, to be executed first */
706	if (checkcnt)	1021	if (checkcnt)
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		1023
709	call_pending ();	1024	call_pending (EV_A);
710	}	1025	}
711	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
712		1027
713	if (ev_loop_done != 2)	1028	if (loop_done != 2)
714	ev_loop_done = 0;	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
715	}	1036	}
716		1037
717	/*****************************************************************************/	1038	/*****************************************************************************/
718		1039
719	static void	1040	inline void
720	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
721	{	1042	{
722	elem->next = *head;	1043	elem->next = *head;
723	*head = elem;	1044	*head = elem;
724	}	1045	}
725		1046
726	static void	1047	inline void
727	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
728	{	1049	{
729	while (*head)	1050	while (*head)
730	{	1051	{
731	if (*head == elem)	1052	if (*head == elem)
…		…
736		1057
737	head = &(*head)->next;	1058	head = &(*head)->next;
738	}	1059	}
739	}	1060	}
740		1061
741	static void	1062	inline void
742	ev_clear_pending (W w)	1063	ev_clear_pending (EV_P_ W w)
743	{	1064	{
744	if (w->pending)	1065	if (w->pending)
745	{	1066	{
746	pendings [w->pending - 1].w = 0;	1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1068	w->pending = 0;
748	}	1069	}
749	}	1070	}
750		1071
751	static void	1072	inline void
752	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
753	{	1074	{
		1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
754	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
755	}	1080	}
756		1081
757	static void	1082	inline void
758	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
759	{	1084	{
		1085	ev_unref (EV_A);
760	w->active = 0;	1086	w->active = 0;
761	}	1087	}
762		1088
763	/*****************************************************************************/	1089	/*****************************************************************************/
764		1090
765	void	1091	void
766	ev_io_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
767	{	1093	{
		1094	int fd = w->fd;
		1095
768	if (ev_is_active (w))	1096	if (ev_is_active (w))
769	return;	1097	return;
770		1098
771	int fd = w->fd;
772
773	assert (("ev_io_start called with negative fd", fd >= 0));	1099	assert (("ev_io_start called with negative fd", fd >= 0));
774		1100
775	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1104
779	fd_change (fd);	1105	fd_change (EV_A_ fd);
780	}	1106	}
781		1107
782	void	1108	void
783	ev_io_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
784	{	1110	{
785	ev_clear_pending ((W)w);	1111	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
787	return;	1113	return;
788		1114
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
791		1117
792	fd_change (w->fd);	1118	fd_change (EV_A_ w->fd);
793	}	1119	}
794		1120
795	void	1121	void
796	ev_timer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
797	{	1123	{
798	if (ev_is_active (w))	1124	if (ev_is_active (w))
799	return;	1125	return;
800		1126
801	w->at += now;	1127	((WT)w)->at += mn_now;
802		1128
803	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1129	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
804		1130
805	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
807	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
809	}
810		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
811	void	1139	void
812	ev_timer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
813	{	1141	{
814	ev_clear_pending ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
816	return;	1144	return;
817		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
818	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
819	{	1149	{
820	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
821	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
822	}	1152	}
823		1153
824	w->at = w->repeat;	1154	((WT)w)->at = w->repeat;
825		1155
826	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
827	}	1157	}
828		1158
829	void	1159	void
830	ev_timer_again (struct ev_timer *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
831	{	1161	{
832	if (ev_is_active (w))	1162	if (ev_is_active (w))
833	{	1163	{
834	if (w->repeat)	1164	if (w->repeat)
835	{	1165	{
836	w->at = now + w->repeat;	1166	((WT)w)->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
838	}	1168	}
839	else	1169	else
840	ev_timer_stop (w);	1170	ev_timer_stop (EV_A_ w);
841	}	1171	}
842	else if (w->repeat)	1172	else if (w->repeat)
843	ev_timer_start (w);	1173	ev_timer_start (EV_A_ w);
844	}	1174	}
845		1175
846	void	1176	void
847	ev_periodic_start (struct ev_periodic *w)	1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
848	{	1178	{
849	if (ev_is_active (w))	1179	if (ev_is_active (w))
850	return;	1180	return;
851		1181
852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1182	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
853		1183
854	/* this formula differs from the one in periodic_reify because we do not always round up */	1184	/* this formula differs from the one in periodic_reify because we do not always round up */
855	if (w->interval)	1185	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1186	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
857		1187
858	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
860	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
862	}
863		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
864	void	1196	void
865	ev_periodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
866	{	1198	{
867	ev_clear_pending ((W)w);	1199	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
869	return;	1201	return;
870		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
871	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
872	{	1206	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
875	}	1209	}
876		1210
877	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
878	}	1212	}
879		1213
880	void	1214	void
881	ev_signal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1216	{
883	if (ev_is_active (w))	1217	if (ev_is_active (w))
884	return;	1218	return;
885		1219
		1220	ev_start (EV_A_ (W)w, ++idlecnt);
		1221	array_needsize (idles, idlemax, idlecnt, );
		1222	idles [idlecnt - 1] = w;
		1223	}
		1224
		1225	void
		1226	ev_idle_stop (EV_P_ struct ev_idle *w)
		1227	{
		1228	ev_clear_pending (EV_A_ (W)w);
		1229	if (ev_is_active (w))
		1230	return;
		1231
		1232	idles [((W)w)->active - 1] = idles [--idlecnt];
		1233	ev_stop (EV_A_ (W)w);
		1234	}
		1235
		1236	void
		1237	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1238	{
		1239	if (ev_is_active (w))
		1240	return;
		1241
		1242	ev_start (EV_A_ (W)w, ++preparecnt);
		1243	array_needsize (prepares, preparemax, preparecnt, );
		1244	prepares [preparecnt - 1] = w;
		1245	}
		1246
		1247	void
		1248	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1249	{
		1250	ev_clear_pending (EV_A_ (W)w);
		1251	if (ev_is_active (w))
		1252	return;
		1253
		1254	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1255	ev_stop (EV_A_ (W)w);
		1256	}
		1257
		1258	void
		1259	ev_check_start (EV_P_ struct ev_check *w)
		1260	{
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	ev_start (EV_A_ (W)w, ++checkcnt);
		1265	array_needsize (checks, checkmax, checkcnt, );
		1266	checks [checkcnt - 1] = w;
		1267	}
		1268
		1269	void
		1270	ev_check_stop (EV_P_ struct ev_check *w)
		1271	{
		1272	ev_clear_pending (EV_A_ (W)w);
		1273	if (ev_is_active (w))
		1274	return;
		1275
		1276	checks [((W)w)->active - 1] = checks [--checkcnt];
		1277	ev_stop (EV_A_ (W)w);
		1278	}
		1279
		1280	#ifndef SA_RESTART
		1281	# define SA_RESTART 0
		1282	#endif
		1283
		1284	void
		1285	ev_signal_start (EV_P_ struct ev_signal *w)
		1286	{
		1287	#if EV_MULTIPLICITY
		1288	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1289	#endif
		1290	if (ev_is_active (w))
		1291	return;
		1292
886	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1293	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
887		1294
888	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1298
892	if (!w->next)	1299	if (!((WL)w)->next)
893	{	1300	{
894	struct sigaction sa;	1301	struct sigaction sa;
895	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
899	}	1306	}
900	}	1307	}
901		1308
902	void	1309	void
903	ev_signal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
904	{	1311	{
905	ev_clear_pending ((W)w);	1312	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
907	return;	1314	return;
908		1315
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
911		1318
912	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
914	}	1321	}
915		1322
916	void	1323	void
917	ev_idle_start (struct ev_idle *w)	1324	ev_child_start (EV_P_ struct ev_child *w)
918	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
919	if (ev_is_active (w))	1329	if (ev_is_active (w))
920	return;	1330	return;
921		1331
922	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	1334	}
926		1335
927	void	1336	void
928	ev_idle_stop (struct ev_idle *w)	1337	ev_child_stop (EV_P_ struct ev_child *w)
929	{	1338	{
930	ev_clear_pending ((W)w);	1339	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1340	if (ev_is_active (w))
932	return;	1341	return;
933		1342
934	idles [w->active - 1] = idles [--idlecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_prepare_start (struct ev_prepare *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++preparecnt);
945	array_needsize (prepares, preparemax, preparecnt, );
946	prepares [preparecnt - 1] = w;
947	}
948
949	void
950	ev_prepare_stop (struct ev_prepare *w)
951	{
952	ev_clear_pending ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	prepares [w->active - 1] = prepares [--preparecnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_check_start (struct ev_check *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, ++checkcnt);
967	array_needsize (checks, checkmax, checkcnt, );
968	checks [checkcnt - 1] = w;
969	}
970
971	void
972	ev_check_stop (struct ev_check *w)
973	{
974	ev_clear_pending ((W)w);
975	if (ev_is_active (w))
976	return;
977
978	checks [w->active - 1] = checks [--checkcnt];
979	ev_stop ((W)w);
980	}
981
982	void
983	ev_child_start (struct ev_child *w)
984	{
985	if (ev_is_active (w))
986	return;
987
988	ev_start ((W)w, 1);
989	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	}
991
992	void
993	ev_child_stop (struct ev_child *w)
994	{
995	ev_clear_pending ((W)w);
996	if (ev_is_active (w))
997	return;
998
999	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1344	ev_stop (EV_A_ (W)w);
1001	}	1345	}
1002		1346
1003	/*****************************************************************************/	1347	/*****************************************************************************/
1004		1348
1005	struct ev_once	1349	struct ev_once
…		…
1009	void (cb)(int revents, void arg);	1353	void (cb)(int revents, void arg);
1010	void *arg;	1354	void *arg;
1011	};	1355	};
1012		1356
1013	static void	1357	static void
1014	once_cb (struct ev_once *once, int revents)	1358	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1359	{
1016	void (cb)(int revents, void arg) = once->cb;	1360	void (cb)(int revents, void arg) = once->cb;
1017	void *arg = once->arg;	1361	void *arg = once->arg;
1018		1362
1019	ev_io_stop (&once->io);	1363	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1364	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1365	free (once);
1022		1366
1023	cb (revents, arg);	1367	cb (revents, arg);
1024	}	1368	}
1025		1369
1026	static void	1370	static void
1027	once_cb_io (struct ev_io *w, int revents)	1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
1028	{	1372	{
1029	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1373	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1030	}	1374	}
1031		1375
1032	static void	1376	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1034	{	1378	{
1035	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1379	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1036	}	1380	}
1037		1381
1038	void	1382	void
1039	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1383	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1040	{	1384	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1385	struct ev_once *once = malloc (sizeof (struct ev_once));
1042		1386
1043	if (!once)	1387	if (!once)
1044	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1388	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1049		1393
1050	ev_watcher_init (&once->io, once_cb_io);	1394	ev_watcher_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1395	if (fd >= 0)
1052	{	1396	{
1053	ev_io_set (&once->io, fd, events);	1397	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1398	ev_io_start (EV_A_ &once->io);
1055	}	1399	}
1056		1400
1057	ev_watcher_init (&once->to, once_cb_to);	1401	ev_watcher_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1402	if (timeout >= 0.)
1059	{	1403	{
1060	ev_timer_set (&once->to, timeout, 0.);	1404	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1405	ev_timer_start (EV_A_ &once->to);
1062	}	1406	}
1063	}	1407	}
1064	}	1408	}
1065		1409
1066	/*****************************************************************************/
1067
1068	#if 0
1069
1070	struct ev_io wio;
1071
1072	static void
1073	sin_cb (struct ev_io *w, int revents)
1074	{
1075	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1076	}
1077
1078	static void
1079	ocb (struct ev_timer *w, int revents)
1080	{
1081	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1082	ev_timer_stop (w);
1083	ev_timer_start (w);
1084	}
1085
1086	static void
1087	scb (struct ev_signal *w, int revents)
1088	{
1089	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1090	ev_io_stop (&wio);
1091	ev_io_start (&wio);
1092	}
1093
1094	static void
1095	gcb (struct ev_signal *w, int revents)
1096	{
1097	fprintf (stderr, "generic %x\n", revents);
1098
1099	}
1100
1101	int main (void)
1102	{
1103	ev_init (0);
1104
1105	ev_io_init (&wio, sin_cb, 0, EV_READ);
1106	ev_io_start (&wio);
1107
1108	struct ev_timer t[10000];
1109
1110	#if 0
1111	int i;
1112	for (i = 0; i < 10000; ++i)
1113	{
1114	struct ev_timer *w = t + i;
1115	ev_watcher_init (w, ocb, i);
1116	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1117	ev_timer_start (w);
1118	if (drand48 () < 0.5)
1119	ev_timer_stop (w);
1120	}
1121	#endif
1122
1123	struct ev_timer t1;
1124	ev_timer_init (&t1, ocb, 5, 10);
1125	ev_timer_start (&t1);
1126
1127	struct ev_signal sig;
1128	ev_signal_init (&sig, scb, SIGQUIT);
1129	ev_signal_start (&sig);
1130
1131	struct ev_check cw;
1132	ev_check_init (&cw, gcb);
1133	ev_check_start (&cw);
1134
1135	struct ev_idle iw;
1136	ev_idle_init (&iw, gcb);
1137	ev_idle_start (&iw);
1138
1139	ev_loop (0);
1140
1141	return 0;
1142	}
1143
1144	#endif
1145
1146
1147
1148

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Comparing libev/ev.c (file contents): Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs. Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC