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

Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.58 by root, Sun Nov 4 16:52:52 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_EMBED
32	# include "config.h"	32	# include "config.h"
33	#endif	33	#endif
34		34
35	#include <math.h>	35	#include <math.h>
36	#include <stdlib.h>	36	#include <stdlib.h>
…		…
42	#include <stdio.h>	42	#include <stdio.h>
43		43
44	#include <assert.h>	44	#include <assert.h>
45	#include <errno.h>	45	#include <errno.h>
46	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
47	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
48	#include <sys/time.h>	50	#include <sys/time.h>
49	#include <time.h>	51	#include <time.h>
50		52
51	/**/	53	/**/
52		54
…		…
56		58
57	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
59	#endif	61	#endif
60		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
61	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
63	#endif	73	#endif
64		74
65	#ifndef EV_USE_REALTIME	75	#ifndef EV_USE_REALTIME
66	# define EV_USE_REALTIME 1	76	# define EV_USE_REALTIME 1
67	#endif	77	#endif
…		…
83	#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) */
84	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
85	#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 */
86	/#define CLEANUP_INTERVAL 300. / 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 */
87		97
		98	#ifndef EV_EMBED
88	#include "ev.h"	99	# include "ev.h"
		100	#endif
89		101
90	#if __GNUC__ >= 3	102	#if __GNUC__ >= 3
91	# define expect(expr,value) __builtin_expect ((expr),(value))	103	# define expect(expr,value) __builtin_expect ((expr),(value))
92	# define inline inline	104	# define inline inline
93	#else	105	#else
…		…
96	#endif	108	#endif
97		109
98	#define expect_false(expr) expect ((expr) != 0, 0)	110	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	111	#define expect_true(expr) expect ((expr) != 0, 1)
100		112
		113	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		114	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		115
101	typedef struct ev_watcher *W;	116	typedef struct ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	117	typedef struct ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	118	typedef struct ev_watcher_time *WT;
104		119
105	static ev_tstamp now_floor, now, diff; /* monotonic clock */	120	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
106	ev_tstamp ev_now;
107	int ev_method;
108
109	static int have_monotonic; /* runtime */
110
111	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
112	static void (*method_modify)(int fd, int oev, int nev);
113	static void (*method_poll)(ev_tstamp timeout);
114		121
115	/*****************************************************************************/	122	/*****************************************************************************/
116		123
117	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
118	ev_time (void)	158	ev_time (void)
119	{	159	{
120	#if EV_USE_REALTIME	160	#if EV_USE_REALTIME
121	struct timespec ts;	161	struct timespec ts;
122	clock_gettime (CLOCK_REALTIME, &ts);	162	clock_gettime (CLOCK_REALTIME, &ts);
…		…
126	gettimeofday (&tv, 0);	166	gettimeofday (&tv, 0);
127	return tv.tv_sec + tv.tv_usec * 1e-6;	167	return tv.tv_sec + tv.tv_usec * 1e-6;
128	#endif	168	#endif
129	}	169	}
130		170
131	static ev_tstamp	171	inline ev_tstamp
132	get_clock (void)	172	get_clock (void)
133	{	173	{
134	#if EV_USE_MONOTONIC	174	#if EV_USE_MONOTONIC
135	if (expect_true (have_monotonic))	175	if (expect_true (have_monotonic))
136	{	176	{
…		…
139	return ts.tv_sec + ts.tv_nsec * 1e-9;	179	return ts.tv_sec + ts.tv_nsec * 1e-9;
140	}	180	}
141	#endif	181	#endif
142		182
143	return ev_time ();	183	return ev_time ();
		184	}
		185
		186	ev_tstamp
		187	ev_now (EV_P)
		188	{
		189	return rt_now;
144	}	190	}
145		191
146	#define array_roundsize(base,n) ((n) \| 4 & ~3)	192	#define array_roundsize(base,n) ((n) \| 4 & ~3)
147		193
148	#define array_needsize(base,cur,cnt,init) \	194	#define array_needsize(base,cur,cnt,init) \
…		…
160	cur = newcnt; \	206	cur = newcnt; \
161	}	207	}
162		208
163	/*****************************************************************************/	209	/*****************************************************************************/
164		210
165	typedef struct
166	{
167	struct ev_io *head;
168	unsigned char events;
169	unsigned char reify;
170	} ANFD;
171
172	static ANFD *anfds;
173	static int anfdmax;
174
175	static void	211	static void
176	anfds_init (ANFD *base, int count)	212	anfds_init (ANFD *base, int count)
177	{	213	{
178	while (count--)	214	while (count--)
179	{	215	{
…		…
183		219
184	++base;	220	++base;
185	}	221	}
186	}	222	}
187		223
188	typedef struct
189	{
190	W w;
191	int events;
192	} ANPENDING;
193
194	static ANPENDING *pendings;
195	static int pendingmax, pendingcnt;
196
197	static void	224	static void
198	event (W w, int events)	225	event (EV_P_ W w, int events)
199	{	226	{
200	if (w->pending)	227	if (w->pending)
201	{	228	{
202	pendings [w->pending - 1].events \|= events;	229	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
203	return;	230	return;
204	}	231	}
205		232
206	w->pending = ++pendingcnt;	233	w->pending = ++pendingcnt [ABSPRI (w)];
207	array_needsize (pendings, pendingmax, pendingcnt, );	234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
208	pendings [pendingcnt - 1].w = w;	235	pendings [ABSPRI (w)][w->pending - 1].w = w;
209	pendings [pendingcnt - 1].events = events;	236	pendings [ABSPRI (w)][w->pending - 1].events = events;
210	}	237	}
211		238
212	static void	239	static void
213	queue_events (W *events, int eventcnt, int type)	240	queue_events (EV_P_ W *events, int eventcnt, int type)
214	{	241	{
215	int i;	242	int i;
216		243
217	for (i = 0; i < eventcnt; ++i)	244	for (i = 0; i < eventcnt; ++i)
218	event (events [i], type);	245	event (EV_A_ events [i], type);
219	}	246	}
220		247
221	static void	248	static void
222	fd_event (int fd, int events)	249	fd_event (EV_P_ int fd, int events)
223	{	250	{
224	ANFD *anfd = anfds + fd;	251	ANFD *anfd = anfds + fd;
225	struct ev_io *w;	252	struct ev_io *w;
226		253
227	for (w = anfd->head; w; w = w->next)	254	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
228	{	255	{
229	int ev = w->events & events;	256	int ev = w->events & events;
230		257
231	if (ev)	258	if (ev)
232	event ((W)w, ev);	259	event (EV_A_ (W)w, ev);
233	}	260	}
234	}	261	}
235		262
236	/*****************************************************************************/	263	/*****************************************************************************/
237		264
238	static int *fdchanges;
239	static int fdchangemax, fdchangecnt;
240
241	static void	265	static void
242	fd_reify (void)	266	fd_reify (EV_P)
243	{	267	{
244	int i;	268	int i;
245		269
246	for (i = 0; i < fdchangecnt; ++i)	270	for (i = 0; i < fdchangecnt; ++i)
247	{	271	{
…		…
249	ANFD *anfd = anfds + fd;	273	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	274	struct ev_io *w;
251		275
252	int events = 0;	276	int events = 0;
253		277
254	for (w = anfd->head; w; w = w->next)	278	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
255	events \|= w->events;	279	events \|= w->events;
256		280
257	anfd->reify = 0;	281	anfd->reify = 0;
258		282
259	if (anfd->events != events)	283	if (anfd->events != events)
260	{	284	{
261	method_modify (fd, anfd->events, events);	285	method_modify (EV_A_ fd, anfd->events, events);
262	anfd->events = events;	286	anfd->events = events;
263	}	287	}
264	}	288	}
265		289
266	fdchangecnt = 0;	290	fdchangecnt = 0;
267	}	291	}
268		292
269	static void	293	static void
270	fd_change (int fd)	294	fd_change (EV_P_ int fd)
271	{	295	{
272	if (anfds [fd].reify \|\| fdchangecnt < 0)	296	if (anfds [fd].reify \|\| fdchangecnt < 0)
273	return;	297	return;
274		298
275	anfds [fd].reify = 1;	299	anfds [fd].reify = 1;
…		…
277	++fdchangecnt;	301	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
279	fdchanges [fdchangecnt - 1] = fd;	303	fdchanges [fdchangecnt - 1] = fd;
280	}	304	}
281		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
282	/* called on EBADF to verify fds */	318	/* called on EBADF to verify fds */
283	static void	319	static void
284	fd_recheck (void)	320	fd_ebadf (EV_P)
285	{	321	{
286	int fd;	322	int fd;
287		323
288	for (fd = 0; fd < anfdmax; ++fd)	324	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	325	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
291	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)
292	{	338	{
293	ev_io_stop (anfds [fd].head);	339	close (fd);
294	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	340	fd_kill (EV_A_ fd);
		341	return;
295	}	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	}
296	}	358	}
297		359
298	/*****************************************************************************/	360	/*****************************************************************************/
299		361
300	static struct ev_timer **timers;
301	static int timermax, timercnt;
302
303	static struct ev_periodic **periodics;
304	static int periodicmax, periodiccnt;
305
306	static void	362	static void
307	upheap (WT *timers, int k)	363	upheap (WT *heap, int k)
308	{	364	{
309	WT w = timers [k];	365	WT w = heap [k];
310		366
311	while (k && timers [k >> 1]->at > w->at)	367	while (k && heap [k >> 1]->at > w->at)
312	{	368	{
313	timers [k] = timers [k >> 1];	369	heap [k] = heap [k >> 1];
314	timers [k]->active = k + 1;	370	heap [k]->active = k + 1;
315	k >>= 1;	371	k >>= 1;
316	}	372	}
317		373
318	timers [k] = w;	374	heap [k] = w;
319	timers [k]->active = k + 1;	375	heap [k]->active = k + 1;
320		376
321	}	377	}
322		378
323	static void	379	static void
324	downheap (WT *timers, int N, int k)	380	downheap (WT *heap, int N, int k)
325	{	381	{
326	WT w = timers [k];	382	WT w = heap [k];
327		383
328	while (k < (N >> 1))	384	while (k < (N >> 1))
329	{	385	{
330	int j = k << 1;	386	int j = k << 1;
331		387
332	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
333	++j;	389	++j;
334		390
335	if (w->at <= timers [j]->at)	391	if (w->at <= heap [j]->at)
336	break;	392	break;
337		393
338	timers [k] = timers [j];	394	heap [k] = heap [j];
339	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
340	k = j;	396	k = j;
341	}	397	}
342		398
343	timers [k] = w;	399	heap [k] = w;
344	timers [k]->active = k + 1;	400	heap [k]->active = k + 1;
345	}	401	}
346		402
347	/*****************************************************************************/	403	/*****************************************************************************/
348		404
349	typedef struct	405	typedef struct
350	{	406	{
351	struct ev_signal *head;	407	struct ev_watcher_list *head;
352	sig_atomic_t volatile gotsig;	408	sig_atomic_t volatile gotsig;
353	} ANSIG;	409	} ANSIG;
354		410
355	static ANSIG *signals;	411	static ANSIG *signals;
356	static int signalmax;	412	static int signalmax;
357		413
358	static int sigpipe [2];	414	static int sigpipe [2];
359	static sig_atomic_t volatile gotsig;	415	static sig_atomic_t volatile gotsig;
360	static struct ev_io sigev;
361		416
362	static void	417	static void
363	signals_init (ANSIG *base, int count)	418	signals_init (ANSIG *base, int count)
364	{	419	{
365	while (count--)	420	while (count--)
…		…
376	{	431	{
377	signals [signum - 1].gotsig = 1;	432	signals [signum - 1].gotsig = 1;
378		433
379	if (!gotsig)	434	if (!gotsig)
380	{	435	{
		436	int old_errno = errno;
381	gotsig = 1;	437	gotsig = 1;
382	write (sigpipe [1], &signum, 1);	438	write (sigpipe [1], &signum, 1);
		439	errno = old_errno;
383	}	440	}
384	}	441	}
385		442
386	static void	443	static void
387	sigcb (struct ev_io *iow, int revents)	444	sigcb (EV_P_ struct ev_io *iow, int revents)
388	{	445	{
389	struct ev_signal *w;	446	struct ev_watcher_list *w;
390	int signum;	447	int signum;
391		448
392	read (sigpipe [0], &revents, 1);	449	read (sigpipe [0], &revents, 1);
393	gotsig = 0;	450	gotsig = 0;
394		451
…		…
396	if (signals [signum].gotsig)	453	if (signals [signum].gotsig)
397	{	454	{
398	signals [signum].gotsig = 0;	455	signals [signum].gotsig = 0;
399		456
400	for (w = signals [signum].head; w; w = w->next)	457	for (w = signals [signum].head; w; w = w->next)
401	event ((W)w, EV_SIGNAL);	458	event (EV_A_ (W)w, EV_SIGNAL);
402	}	459	}
403	}	460	}
404		461
405	static void	462	static void
406	siginit (void)	463	siginit (EV_P)
407	{	464	{
		465	#ifndef WIN32
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410		468
411	/* rather than sort out wether we really need nb, set it */	469	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		472	#endif
414		473
415	ev_io_set (&sigev, sigpipe [0], EV_READ);	474	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);	475	ev_io_start (EV_A_ &sigev);
		476	ev_unref (EV_A); /* child watcher should not keep loop alive */
417	}	477	}
418		478
419	/*****************************************************************************/	479	/*****************************************************************************/
420		480
421	static struct ev_idle **idles;	481	#ifndef WIN32
422	static int idlemax, idlecnt;
423
424	static struct ev_prepare **prepares;
425	static int preparemax, preparecnt;
426
427	static struct ev_check **checks;
428	static int checkmax, checkcnt;
429
430	/*****************************************************************************/
431
432	static struct ev_child *childs [PID_HASHSIZE];
433	static struct ev_signal childev;
434		482
435	#ifndef WCONTINUED	483	#ifndef WCONTINUED
436	# define WCONTINUED 0	484	# define WCONTINUED 0
437	#endif	485	#endif
438		486
439	static void	487	static void
440	childcb (struct ev_signal *sw, int revents)	488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
441	{	489	{
442	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	{
443	int pid, status;	505	int pid, status;
444		506
445	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	507	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	508	{
447	if (w->pid == pid \|\| !w->pid)	509	/* make sure we are called again until all childs have been reaped */
448	{	510	event (EV_A_ (W)sw, EV_SIGNAL);
449	w->status = status;	511
450	event ((W)w, EV_CHILD);	512	child_reap (EV_A_ sw, pid, pid, status);
451	}	513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		514	}
452	}	515	}
		516
		517	#endif
453		518
454	/*****************************************************************************/	519	/*****************************************************************************/
455		520
		521	#if EV_USE_KQUEUE
		522	# include "ev_kqueue.c"
		523	#endif
456	#if EV_USE_EPOLL	524	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	525	# include "ev_epoll.c"
458	#endif	526	#endif
		527	#if EV_USEV_POLL
		528	# include "ev_poll.c"
		529	#endif
459	#if EV_USE_SELECT	530	#if EV_USE_SELECT
460	# include "ev_select.c"	531	# include "ev_select.c"
461	#endif	532	#endif
462		533
463	int	534	int
…		…
470	ev_version_minor (void)	541	ev_version_minor (void)
471	{	542	{
472	return EV_VERSION_MINOR;	543	return EV_VERSION_MINOR;
473	}	544	}
474		545
475	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)
476	{	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	{
477	if (!ev_method)	567	if (!method)
478	{	568	{
479	#if EV_USE_MONOTONIC	569	#if EV_USE_MONOTONIC
480	{	570	{
481	struct timespec ts;	571	struct timespec ts;
482	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
483	have_monotonic = 1;	573	have_monotonic = 1;
484	}	574	}
485	#endif	575	#endif
486		576
487	ev_now = ev_time ();	577	rt_now = ev_time ();
488	now = get_clock ();	578	mn_now = get_clock ();
489	now_floor = now;	579	now_floor = mn_now;
490	diff = ev_now - now;	580	rtmn_diff = rt_now - mn_now;
491		581
492	if (pipe (sigpipe))	582	if (methods == EVMETHOD_AUTO)
493	return 0;	583	if (!enable_secure () && getenv ("LIBEV_METHODS"))
494		584	methods = atoi (getenv ("LIBEV_METHODS"));
		585	else
495	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
496	#if EV_USE_EPOLL	592	#if EV_USE_EPOLL
497	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);
498	#endif	597	#endif
499	#if EV_USE_SELECT	598	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
501	#endif	600	#endif
		601	}
		602	}
502		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
503	if (ev_method)	691	if (ev_method (EV_A))
504	{	692	{
505	ev_watcher_init (&sigev, sigcb);	693	ev_watcher_init (&sigev, sigcb);
		694	ev_set_priority (&sigev, EV_MAXPRI);
506	siginit ();	695	siginit (EV_A);
507		696
		697	#ifndef WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	698	ev_signal_init (&childev, childcb, SIGCHLD);
		699	ev_set_priority (&childev, EV_MAXPRI);
509	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
510	}	703	}
		704	else
		705	default_loop = 0;
511	}	706	}
512		707
513	return ev_method;	708	return default_loop;
514	}	709	}
515		710
516	/*****************************************************************************/
517
518	void	711	void
519	ev_fork_prepare (void)	712	ev_default_destroy (void)
520	{	713	{
521	/* nop */	714	#if EV_MULTIPLICITY
522	}	715	struct ev_loop *loop = default_loop;
523
524	void
525	ev_fork_parent (void)
526	{
527	/* nop */
528	}
529
530	void
531	ev_fork_child (void)
532	{
533	#if EV_USE_EPOLL
534	if (ev_method == EVMETHOD_EPOLL)
535	epoll_postfork_child ();
536	#endif	716	#endif
537		717
		718	ev_ref (EV_A); /* child watcher */
		719	ev_signal_stop (EV_A_ &childev);
		720
		721	ev_ref (EV_A); /* signal watcher */
538	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);
539	close (sigpipe [0]);	736	close (sigpipe [0]);
540	close (sigpipe [1]);	737	close (sigpipe [1]);
541	pipe (sigpipe);	738	pipe (sigpipe);
		739
		740	ev_ref (EV_A); /* signal watcher */
542	siginit ();	741	siginit (EV_A);
543	}	742	}
544		743
545	/*****************************************************************************/	744	/*****************************************************************************/
546		745
547	static void	746	static void
548	call_pending (void)	747	call_pending (EV_P)
549	{	748	{
		749	int pri;
		750
		751	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	752	while (pendingcnt [pri])
551	{	753	{
552	ANPENDING *p = pendings + --pendingcnt;	754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		755
554	if (p->w)	756	if (p->w)
555	{	757	{
556	p->w->pending = 0;	758	p->w->pending = 0;
557	p->w->cb (p->w, p->events);	759	p->w->cb (EV_A_ p->w, p->events);
558	}	760	}
559	}	761	}
560	}	762	}
561		763
562	static void	764	static void
563	timers_reify (void)	765	timers_reify (EV_P)
564	{	766	{
565	while (timercnt && timers [0]->at <= now)	767	while (timercnt && timers [0]->at <= mn_now)
566	{	768	{
567	struct ev_timer *w = timers [0];	769	struct ev_timer *w = timers [0];
568		770
569	/* first reschedule or stop timer */	771	/* first reschedule or stop timer */
570	if (w->repeat)	772	if (w->repeat)
571	{	773	{
572	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	774	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
573	w->at = now + w->repeat;	775	w->at = mn_now + w->repeat;
574	downheap ((WT *)timers, timercnt, 0);	776	downheap ((WT *)timers, timercnt, 0);
575	}	777	}
576	else	778	else
577	ev_timer_stop (w); /* nonrepeating: stop timer */	779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
578		780
579	event ((W)w, EV_TIMEOUT);	781	event (EV_A_ (W)w, EV_TIMEOUT);
580	}	782	}
581	}	783	}
582		784
583	static void	785	static void
584	periodics_reify (void)	786	periodics_reify (EV_P)
585	{	787	{
586	while (periodiccnt && periodics [0]->at <= ev_now)	788	while (periodiccnt && periodics [0]->at <= rt_now)
587	{	789	{
588	struct ev_periodic *w = periodics [0];	790	struct ev_periodic *w = periodics [0];
589		791
590	/* first reschedule or stop timer */	792	/* first reschedule or stop timer */
591	if (w->interval)	793	if (w->interval)
592	{	794	{
593	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;
594	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	796	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
595	downheap ((WT *)periodics, periodiccnt, 0);	797	downheap ((WT *)periodics, periodiccnt, 0);
596	}	798	}
597	else	799	else
598	ev_periodic_stop (w); /* nonrepeating: stop timer */	800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
599		801
600	event ((W)w, EV_PERIODIC);	802	event (EV_A_ (W)w, EV_PERIODIC);
601	}	803	}
602	}	804	}
603		805
604	static void	806	static void
605	periodics_reschedule (ev_tstamp diff)	807	periodics_reschedule (EV_P)
606	{	808	{
607	int i;	809	int i;
608		810
609	/* adjust periodics after time jump */	811	/* adjust periodics after time jump */
610	for (i = 0; i < periodiccnt; ++i)	812	for (i = 0; i < periodiccnt; ++i)
611	{	813	{
612	struct ev_periodic *w = periodics [i];	814	struct ev_periodic *w = periodics [i];
613		815
614	if (w->interval)	816	if (w->interval)
615	{	817	{
616	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;
617		819
618	if (fabs (diff) >= 1e-4)	820	if (fabs (diff) >= 1e-4)
619	{	821	{
620	ev_periodic_stop (w);	822	ev_periodic_stop (EV_A_ w);
621	ev_periodic_start (w);	823	ev_periodic_start (EV_A_ w);
622		824
623	i = 0; /* restart loop, inefficient, but time jumps should be rare */	825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
624	}	826	}
625	}	827	}
626	}	828	}
627	}	829	}
628		830
629	static int	831	inline int
630	time_update_monotonic (void)	832	time_update_monotonic (EV_P)
631	{	833	{
632	now = get_clock ();	834	mn_now = get_clock ();
633		835
634	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	836	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
635	{	837	{
636	ev_now = now + diff;	838	rt_now = rtmn_diff + mn_now;
637	return 0;	839	return 0;
638	}	840	}
639	else	841	else
640	{	842	{
641	now_floor = now;	843	now_floor = mn_now;
642	ev_now = ev_time ();	844	rt_now = ev_time ();
643	return 1;	845	return 1;
644	}	846	}
645	}	847	}
646		848
647	static void	849	static void
648	time_update (void)	850	time_update (EV_P)
649	{	851	{
650	int i;	852	int i;
651		853
652	#if EV_USE_MONOTONIC	854	#if EV_USE_MONOTONIC
653	if (expect_true (have_monotonic))	855	if (expect_true (have_monotonic))
654	{	856	{
655	if (time_update_monotonic ())	857	if (time_update_monotonic (EV_A))
656	{	858	{
657	ev_tstamp odiff = diff;	859	ev_tstamp odiff = rtmn_diff;
658		860
659	for (i = 4; --i; ) /* loop a few times, before making important decisions */	861	for (i = 4; --i; ) /* loop a few times, before making important decisions */
660	{	862	{
661	diff = ev_now - now;	863	rtmn_diff = rt_now - mn_now;
662		864
663	if (fabs (odiff - diff) < MIN_TIMEJUMP)	865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
664	return; /* all is well */	866	return; /* all is well */
665		867
666	ev_now = ev_time ();	868	rt_now = ev_time ();
667	now = get_clock ();	869	mn_now = get_clock ();
668	now_floor = now;	870	now_floor = mn_now;
669	}	871	}
670		872
671	periodics_reschedule (diff - odiff);	873	periodics_reschedule (EV_A);
672	/* no timer adjustment, as the monotonic clock doesn't jump */	874	/* no timer adjustment, as the monotonic clock doesn't jump */
		875	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
673	}	876	}
674	}	877	}
675	else	878	else
676	#endif	879	#endif
677	{	880	{
678	ev_now = ev_time ();	881	rt_now = ev_time ();
679		882
680	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	883	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
681	{	884	{
682	periodics_reschedule (ev_now - now);	885	periodics_reschedule (EV_A);
683		886
684	/* 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 */
685	for (i = 0; i < timercnt; ++i)	888	for (i = 0; i < timercnt; ++i)
686	timers [i]->at += diff;	889	timers [i]->at += rt_now - mn_now;
687	}	890	}
688		891
689	now = ev_now;	892	mn_now = rt_now;
690	}	893	}
691	}	894	}
692		895
693	int ev_loop_done;	896	void
		897	ev_ref (EV_P)
		898	{
		899	++activecnt;
		900	}
694		901
		902	void
		903	ev_unref (EV_P)
		904	{
		905	--activecnt;
		906	}
		907
		908	static int loop_done;
		909
		910	void
695	void ev_loop (int flags)	911	ev_loop (EV_P_ int flags)
696	{	912	{
697	double block;	913	double block;
698	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	914	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
699		915
700	do	916	do
701	{	917	{
702	/* queue check watchers (and execute them) */	918	/* queue check watchers (and execute them) */
703	if (expect_false (preparecnt))	919	if (expect_false (preparecnt))
704	{	920	{
705	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
706	call_pending ();	922	call_pending (EV_A);
707	}	923	}
708		924
709	/* update fd-related kernel structures */	925	/* update fd-related kernel structures */
710	fd_reify ();	926	fd_reify (EV_A);
711		927
712	/* calculate blocking time */	928	/* calculate blocking time */
713		929
714	/* 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
715	always have timers, we just calculate it always */	931	always have timers, we just calculate it always */
716	#if EV_USE_MONOTONIC	932	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	933	if (expect_true (have_monotonic))
718	time_update_monotonic ();	934	time_update_monotonic (EV_A);
719	else	935	else
720	#endif	936	#endif
721	{	937	{
722	ev_now = ev_time ();	938	rt_now = ev_time ();
723	now = ev_now;	939	mn_now = rt_now;
724	}	940	}
725		941
726	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	942	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
727	block = 0.;	943	block = 0.;
728	else	944	else
729	{	945	{
730	block = MAX_BLOCKTIME;	946	block = MAX_BLOCKTIME;
731		947
732	if (timercnt)	948	if (timercnt)
733	{	949	{
734	ev_tstamp to = timers [0]->at - now + method_fudge;	950	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
735	if (block > to) block = to;	951	if (block > to) block = to;
736	}	952	}
737		953
738	if (periodiccnt)	954	if (periodiccnt)
739	{	955	{
740	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
741	if (block > to) block = to;	957	if (block > to) block = to;
742	}	958	}
743		959
744	if (block < 0.) block = 0.;	960	if (block < 0.) block = 0.;
745	}	961	}
746		962
747	method_poll (block);	963	method_poll (EV_A_ block);
748		964
749	/* update ev_now, do magic */	965	/* update rt_now, do magic */
750	time_update ();	966	time_update (EV_A);
751		967
752	/* queue pending timers and reschedule them */	968	/* queue pending timers and reschedule them */
753	timers_reify (); /* relative timers called last */	969	timers_reify (EV_A); /* relative timers called last */
754	periodics_reify (); /* absolute timers called first */	970	periodics_reify (EV_A); /* absolute timers called first */
755		971
756	/* queue idle watchers unless io or timers are pending */	972	/* queue idle watchers unless io or timers are pending */
757	if (!pendingcnt)	973	if (!pendingcnt)
758	queue_events ((W *)idles, idlecnt, EV_IDLE);	974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
759		975
760	/* queue check watchers, to be executed first */	976	/* queue check watchers, to be executed first */
761	if (checkcnt)	977	if (checkcnt)
762	queue_events ((W *)checks, checkcnt, EV_CHECK);	978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
763		979
764	call_pending ();	980	call_pending (EV_A);
765	}	981	}
766	while (!ev_loop_done);	982	while (activecnt && !loop_done);
767		983
768	if (ev_loop_done != 2)	984	if (loop_done != 2)
769	ev_loop_done = 0;	985	loop_done = 0;
		986	}
		987
		988	void
		989	ev_unloop (EV_P_ int how)
		990	{
		991	loop_done = how;
770	}	992	}
771		993
772	/*****************************************************************************/	994	/*****************************************************************************/
773		995
774	static void	996	inline void
775	wlist_add (WL *head, WL elem)	997	wlist_add (WL *head, WL elem)
776	{	998	{
777	elem->next = *head;	999	elem->next = *head;
778	*head = elem;	1000	*head = elem;
779	}	1001	}
780		1002
781	static void	1003	inline void
782	wlist_del (WL *head, WL elem)	1004	wlist_del (WL *head, WL elem)
783	{	1005	{
784	while (*head)	1006	while (*head)
785	{	1007	{
786	if (*head == elem)	1008	if (*head == elem)
…		…
791		1013
792	head = &(*head)->next;	1014	head = &(*head)->next;
793	}	1015	}
794	}	1016	}
795		1017
796	static void	1018	inline void
797	ev_clear_pending (W w)	1019	ev_clear_pending (EV_P_ W w)
798	{	1020	{
799	if (w->pending)	1021	if (w->pending)
800	{	1022	{
801	pendings [w->pending - 1].w = 0;	1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	1024	w->pending = 0;
803	}	1025	}
804	}	1026	}
805		1027
806	static void	1028	inline void
807	ev_start (W w, int active)	1029	ev_start (EV_P_ W w, int active)
808	{	1030	{
		1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1033
809	w->active = active;	1034	w->active = active;
		1035	ev_ref (EV_A);
810	}	1036	}
811		1037
812	static void	1038	inline void
813	ev_stop (W w)	1039	ev_stop (EV_P_ W w)
814	{	1040	{
		1041	ev_unref (EV_A);
815	w->active = 0;	1042	w->active = 0;
816	}	1043	}
817		1044
818	/*****************************************************************************/	1045	/*****************************************************************************/
819		1046
820	void	1047	void
821	ev_io_start (struct ev_io *w)	1048	ev_io_start (EV_P_ struct ev_io *w)
822	{	1049	{
823	int fd = w->fd;	1050	int fd = w->fd;
824		1051
825	if (ev_is_active (w))	1052	if (ev_is_active (w))
826	return;	1053	return;
827		1054
828	assert (("ev_io_start called with negative fd", fd >= 0));	1055	assert (("ev_io_start called with negative fd", fd >= 0));
829		1056
830	ev_start ((W)w, 1);	1057	ev_start (EV_A_ (W)w, 1);
831	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
832	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);
833		1060
834	fd_change (fd);	1061	fd_change (EV_A_ fd);
835	}	1062	}
836		1063
837	void	1064	void
838	ev_io_stop (struct ev_io *w)	1065	ev_io_stop (EV_P_ struct ev_io *w)
839	{	1066	{
840	ev_clear_pending ((W)w);	1067	ev_clear_pending (EV_A_ (W)w);
841	if (!ev_is_active (w))	1068	if (!ev_is_active (w))
842	return;	1069	return;
843		1070
844	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
845	ev_stop ((W)w);	1072	ev_stop (EV_A_ (W)w);
846		1073
847	fd_change (w->fd);	1074	fd_change (EV_A_ w->fd);
848	}	1075	}
849		1076
850	void	1077	void
851	ev_timer_start (struct ev_timer *w)	1078	ev_timer_start (EV_P_ struct ev_timer *w)
852	{	1079	{
853	if (ev_is_active (w))	1080	if (ev_is_active (w))
854	return;	1081	return;
855		1082
856	w->at += now;	1083	w->at += mn_now;
857		1084
858	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1085	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859		1086
860	ev_start ((W)w, ++timercnt);	1087	ev_start (EV_A_ (W)w, ++timercnt);
861	array_needsize (timers, timermax, timercnt, );	1088	array_needsize (timers, timermax, timercnt, );
862	timers [timercnt - 1] = w;	1089	timers [timercnt - 1] = w;
863	upheap ((WT *)timers, timercnt - 1);	1090	upheap ((WT *)timers, timercnt - 1);
864	}	1091	}
865		1092
866	void	1093	void
867	ev_timer_stop (struct ev_timer *w)	1094	ev_timer_stop (EV_P_ struct ev_timer *w)
868	{	1095	{
869	ev_clear_pending ((W)w);	1096	ev_clear_pending (EV_A_ (W)w);
870	if (!ev_is_active (w))	1097	if (!ev_is_active (w))
871	return;	1098	return;
872		1099
873	if (w->active < timercnt--)	1100	if (w->active < timercnt--)
874	{	1101	{
…		…
876	downheap ((WT *)timers, timercnt, w->active - 1);	1103	downheap ((WT *)timers, timercnt, w->active - 1);
877	}	1104	}
878		1105
879	w->at = w->repeat;	1106	w->at = w->repeat;
880		1107
881	ev_stop ((W)w);	1108	ev_stop (EV_A_ (W)w);
882	}	1109	}
883		1110
884	void	1111	void
885	ev_timer_again (struct ev_timer *w)	1112	ev_timer_again (EV_P_ struct ev_timer *w)
886	{	1113	{
887	if (ev_is_active (w))	1114	if (ev_is_active (w))
888	{	1115	{
889	if (w->repeat)	1116	if (w->repeat)
890	{	1117	{
891	w->at = now + w->repeat;	1118	w->at = mn_now + w->repeat;
892	downheap ((WT *)timers, timercnt, w->active - 1);	1119	downheap ((WT *)timers, timercnt, w->active - 1);
893	}	1120	}
894	else	1121	else
895	ev_timer_stop (w);	1122	ev_timer_stop (EV_A_ w);
896	}	1123	}
897	else if (w->repeat)	1124	else if (w->repeat)
898	ev_timer_start (w);	1125	ev_timer_start (EV_A_ w);
899	}	1126	}
900		1127
901	void	1128	void
902	ev_periodic_start (struct ev_periodic *w)	1129	ev_periodic_start (EV_P_ struct ev_periodic *w)
903	{	1130	{
904	if (ev_is_active (w))	1131	if (ev_is_active (w))
905	return;	1132	return;
906		1133
907	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1134	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908		1135
909	/* 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 */
910	if (w->interval)	1137	if (w->interval)
911	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
912		1139
913	ev_start ((W)w, ++periodiccnt);	1140	ev_start (EV_A_ (W)w, ++periodiccnt);
914	array_needsize (periodics, periodicmax, periodiccnt, );	1141	array_needsize (periodics, periodicmax, periodiccnt, );
915	periodics [periodiccnt - 1] = w;	1142	periodics [periodiccnt - 1] = w;
916	upheap ((WT *)periodics, periodiccnt - 1);	1143	upheap ((WT *)periodics, periodiccnt - 1);
917	}	1144	}
918		1145
919	void	1146	void
920	ev_periodic_stop (struct ev_periodic *w)	1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)
921	{	1148	{
922	ev_clear_pending ((W)w);	1149	ev_clear_pending (EV_A_ (W)w);
923	if (!ev_is_active (w))	1150	if (!ev_is_active (w))
924	return;	1151	return;
925		1152
926	if (w->active < periodiccnt--)	1153	if (w->active < periodiccnt--)
927	{	1154	{
928	periodics [w->active - 1] = periodics [periodiccnt];	1155	periodics [w->active - 1] = periodics [periodiccnt];
929	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);
930	}	1157	}
931		1158
932	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
933	}	1160	}
934		1161
935	void	1162	void
936	ev_signal_start (struct ev_signal *w)	1163	ev_idle_start (EV_P_ struct ev_idle *w)
937	{	1164	{
938	if (ev_is_active (w))	1165	if (ev_is_active (w))
939	return;	1166	return;
940		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
941	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1241	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942		1242
943	ev_start ((W)w, 1);	1243	ev_start (EV_A_ (W)w, 1);
944	array_needsize (signals, signalmax, w->signum, signals_init);	1244	array_needsize (signals, signalmax, w->signum, signals_init);
945	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
946		1246
947	if (!w->next)	1247	if (!w->next)
948	{	1248	{
949	struct sigaction sa;	1249	struct sigaction sa;
950	sa.sa_handler = sighandler;	1250	sa.sa_handler = sighandler;
951	sigfillset (&sa.sa_mask);	1251	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	1253	sigaction (w->signum, &sa, 0);
954	}	1254	}
955	}	1255	}
956		1256
957	void	1257	void
958	ev_signal_stop (struct ev_signal *w)	1258	ev_signal_stop (EV_P_ struct ev_signal *w)
959	{	1259	{
960	ev_clear_pending ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
961	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
962	return;	1262	return;
963		1263
964	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
965	ev_stop ((W)w);	1265	ev_stop (EV_A_ (W)w);
966		1266
967	if (!signals [w->signum - 1].head)	1267	if (!signals [w->signum - 1].head)
968	signal (w->signum, SIG_DFL);	1268	signal (w->signum, SIG_DFL);
969	}	1269	}
970		1270
971	void	1271	void
972	ev_idle_start (struct ev_idle *w)	1272	ev_child_start (EV_P_ struct ev_child *w)
973	{	1273	{
		1274	#if EV_MULTIPLICITY
		1275	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1276	#endif
974	if (ev_is_active (w))	1277	if (ev_is_active (w))
975	return;	1278	return;
976		1279
977	ev_start ((W)w, ++idlecnt);	1280	ev_start (EV_A_ (W)w, 1);
978	array_needsize (idles, idlemax, idlecnt, );	1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
979	idles [idlecnt - 1] = w;
980	}	1282	}
981		1283
982	void	1284	void
983	ev_idle_stop (struct ev_idle *w)	1285	ev_child_stop (EV_P_ struct ev_child *w)
984	{	1286	{
985	ev_clear_pending ((W)w);	1287	ev_clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	1288	if (ev_is_active (w))
987	return;	1289	return;
988		1290
989	idles [w->active - 1] = idles [--idlecnt];
990	ev_stop ((W)w);
991	}
992
993	void
994	ev_prepare_start (struct ev_prepare *w)
995	{
996	if (ev_is_active (w))
997	return;
998
999	ev_start ((W)w, ++preparecnt);
1000	array_needsize (prepares, preparemax, preparecnt, );
1001	prepares [preparecnt - 1] = w;
1002	}
1003
1004	void
1005	ev_prepare_stop (struct ev_prepare *w)
1006	{
1007	ev_clear_pending ((W)w);
1008	if (ev_is_active (w))
1009	return;
1010
1011	prepares [w->active - 1] = prepares [--preparecnt];
1012	ev_stop ((W)w);
1013	}
1014
1015	void
1016	ev_check_start (struct ev_check *w)
1017	{
1018	if (ev_is_active (w))
1019	return;
1020
1021	ev_start ((W)w, ++checkcnt);
1022	array_needsize (checks, checkmax, checkcnt, );
1023	checks [checkcnt - 1] = w;
1024	}
1025
1026	void
1027	ev_check_stop (struct ev_check *w)
1028	{
1029	ev_clear_pending ((W)w);
1030	if (ev_is_active (w))
1031	return;
1032
1033	checks [w->active - 1] = checks [--checkcnt];
1034	ev_stop ((W)w);
1035	}
1036
1037	void
1038	ev_child_start (struct ev_child *w)
1039	{
1040	if (ev_is_active (w))
1041	return;
1042
1043	ev_start ((W)w, 1);
1044	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1045	}
1046
1047	void
1048	ev_child_stop (struct ev_child *w)
1049	{
1050	ev_clear_pending ((W)w);
1051	if (ev_is_active (w))
1052	return;
1053
1054	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1055	ev_stop ((W)w);	1292	ev_stop (EV_A_ (W)w);
1056	}	1293	}
1057		1294
1058	/*****************************************************************************/	1295	/*****************************************************************************/
1059		1296
1060	struct ev_once	1297	struct ev_once
…		…
1064	void (cb)(int revents, void arg);	1301	void (cb)(int revents, void arg);
1065	void *arg;	1302	void *arg;
1066	};	1303	};
1067		1304
1068	static void	1305	static void
1069	once_cb (struct ev_once *once, int revents)	1306	once_cb (EV_P_ struct ev_once *once, int revents)
1070	{	1307	{
1071	void (cb)(int revents, void arg) = once->cb;	1308	void (cb)(int revents, void arg) = once->cb;
1072	void *arg = once->arg;	1309	void *arg = once->arg;
1073		1310
1074	ev_io_stop (&once->io);	1311	ev_io_stop (EV_A_ &once->io);
1075	ev_timer_stop (&once->to);	1312	ev_timer_stop (EV_A_ &once->to);
1076	free (once);	1313	free (once);
1077		1314
1078	cb (revents, arg);	1315	cb (revents, arg);
1079	}	1316	}
1080		1317
1081	static void	1318	static void
1082	once_cb_io (struct ev_io *w, int revents)	1319	once_cb_io (EV_P_ struct ev_io *w, int revents)
1083	{	1320	{
1084	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);
1085	}	1322	}
1086		1323
1087	static void	1324	static void
1088	once_cb_to (struct ev_timer *w, int revents)	1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1089	{	1326	{
1090	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);
1091	}	1328	}
1092		1329
1093	void	1330	void
1094	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)
1095	{	1332	{
1096	struct ev_once *once = malloc (sizeof (struct ev_once));	1333	struct ev_once *once = malloc (sizeof (struct ev_once));
1097		1334
1098	if (!once)	1335	if (!once)
1099	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1336	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1104		1341
1105	ev_watcher_init (&once->io, once_cb_io);	1342	ev_watcher_init (&once->io, once_cb_io);
1106	if (fd >= 0)	1343	if (fd >= 0)
1107	{	1344	{
1108	ev_io_set (&once->io, fd, events);	1345	ev_io_set (&once->io, fd, events);
1109	ev_io_start (&once->io);	1346	ev_io_start (EV_A_ &once->io);
1110	}	1347	}
1111		1348
1112	ev_watcher_init (&once->to, once_cb_to);	1349	ev_watcher_init (&once->to, once_cb_to);
1113	if (timeout >= 0.)	1350	if (timeout >= 0.)
1114	{	1351	{
1115	ev_timer_set (&once->to, timeout, 0.);	1352	ev_timer_set (&once->to, timeout, 0.);
1116	ev_timer_start (&once->to);	1353	ev_timer_start (EV_A_ &once->to);
1117	}	1354	}
1118	}	1355	}
1119	}	1356	}
1120		1357
1121	/*****************************************************************************/
1122
1123	#if 0
1124
1125	struct ev_io wio;
1126
1127	static void
1128	sin_cb (struct ev_io *w, int revents)
1129	{
1130	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1131	}
1132
1133	static void
1134	ocb (struct ev_timer *w, int revents)
1135	{
1136	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1137	ev_timer_stop (w);
1138	ev_timer_start (w);
1139	}
1140
1141	static void
1142	scb (struct ev_signal *w, int revents)
1143	{
1144	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1145	ev_io_stop (&wio);
1146	ev_io_start (&wio);
1147	}
1148
1149	static void
1150	gcb (struct ev_signal *w, int revents)
1151	{
1152	fprintf (stderr, "generic %x\n", revents);
1153
1154	}
1155
1156	int main (void)
1157	{
1158	ev_init (0);
1159
1160	ev_io_init (&wio, sin_cb, 0, EV_READ);
1161	ev_io_start (&wio);
1162
1163	struct ev_timer t[10000];
1164
1165	#if 0
1166	int i;
1167	for (i = 0; i < 10000; ++i)
1168	{
1169	struct ev_timer *w = t + i;
1170	ev_watcher_init (w, ocb, i);
1171	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1172	ev_timer_start (w);
1173	if (drand48 () < 0.5)
1174	ev_timer_stop (w);
1175	}
1176	#endif
1177
1178	struct ev_timer t1;
1179	ev_timer_init (&t1, ocb, 5, 10);
1180	ev_timer_start (&t1);
1181
1182	struct ev_signal sig;
1183	ev_signal_init (&sig, scb, SIGQUIT);
1184	ev_signal_start (&sig);
1185
1186	struct ev_check cw;
1187	ev_check_init (&cw, gcb);
1188	ev_check_start (&cw);
1189
1190	struct ev_idle iw;
1191	ev_idle_init (&iw, gcb);
1192	ev_idle_start (&iw);
1193
1194	ev_loop (0);
1195
1196	return 0;
1197	}
1198
1199	#endif
1200
1201
1202
1203

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Comparing libev/ev.c (file contents): Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs. Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC