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Comparing libev/ev.c (file contents):
Revision 1.38 by root, Thu Nov 1 15:21:13 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 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	#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
		53	/**/
		54
51	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
53	#endif	57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		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
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
54		80
55	#ifndef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
56	# undef EV_USE_MONOTONIC	82	# undef EV_USE_MONOTONIC
57	# define EV_USE_MONOTONIC 0	83	# define EV_USE_MONOTONIC 0
58	#endif	84	#endif
59		85
60	#ifndef EV_USE_SELECT
61	# define EV_USE_SELECT 1
62	#endif
63
64	#ifndef EV_USE_EPOLL
65	# define EV_USE_EPOLL 0
66	#endif
67
68	#ifndef CLOCK_REALTIME	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
69	# define EV_USE_REALTIME 0	88	# define EV_USE_REALTIME 0
70	#endif	89	#endif
71	#ifndef EV_USE_REALTIME	90
72	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	91	/**/
73	#endif
74		92
75	#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) */
76	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
77	#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 */
78	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
79		97
80	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
81		113
82	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
83	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
84	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
85		117
86	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
87	ev_tstamp ev_now;
88	int ev_method;
89
90	static int have_monotonic; /* runtime */
91
92	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
93	static void (*method_modify)(int fd, int oev, int nev);
94	static void (*method_poll)(ev_tstamp timeout);
95		119
96	/*****************************************************************************/	120	/*****************************************************************************/
97		121
98	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
99	ev_time (void)	156	ev_time (void)
100	{	157	{
101	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
102	struct timespec ts;	159	struct timespec ts;
103	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
107	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
108	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
109	#endif	166	#endif
110	}	167	}
111		168
112	static ev_tstamp	169	inline ev_tstamp
113	get_clock (void)	170	get_clock (void)
114	{	171	{
115	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
116	if (have_monotonic)	173	if (expect_true (have_monotonic))
117	{	174	{
118	struct timespec ts;	175	struct timespec ts;
119	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
120	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
121	}	178	}
122	#endif	179	#endif
123		180
124	return ev_time ();	181	return ev_time ();
125	}	182	}
126		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
127	#define array_roundsize(base,n) ((n) | 4 & ~3)	190	#define array_roundsize(base,n) ((n) | 4 & ~3)
128		191
129	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
130	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
131	{ \	194	{ \
132	int newcnt = cur; \	195	int newcnt = cur; \
133	do \	196	do \
134	{ \	197	{ \
135	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
141	cur = newcnt; \	204	cur = newcnt; \
142	}	205	}
143		206
144	/*****************************************************************************/	207	/*****************************************************************************/
145		208
146	typedef struct
147	{
148	struct ev_io *head;
149	unsigned char events;
150	unsigned char reify;
151	} ANFD;
152
153	static ANFD *anfds;
154	static int anfdmax;
155
156	static void	209	static void
157	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
158	{	211	{
159	while (count--)	212	while (count--)
160	{	213	{
…		…
164		217
165	++base;	218	++base;
166	}	219	}
167	}	220	}
168		221
169	typedef struct
170	{
171	W w;
172	int events;
173	} ANPENDING;
174
175	static ANPENDING *pendings;
176	static int pendingmax, pendingcnt;
177
178	static void	222	static void
179	event (W w, int events)	223	event (EV_P_ W w, int events)
180	{	224	{
181	if (w->pending)	225	if (w->pending)
182	{	226	{
183	pendings [w->pending - 1].events |= events;	227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
184	return;	228	return;
185	}	229	}
186		230
187	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
188	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
189	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
190	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
191	}	235	}
192		236
193	static void	237	static void
194	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
195	{	239	{
196	int i;	240	int i;
197		241
198	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
199	event (events [i], type);	243	event (EV_A_ events [i], type);
200	}	244	}
201		245
202	static void	246	static void
203	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
204	{	248	{
205	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
206	struct ev_io *w;	250	struct ev_io *w;
207		251
208	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
209	{	253	{
210	int ev = w->events & events;	254	int ev = w->events & events;
211		255
212	if (ev)	256	if (ev)
213	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
214	}	258	}
215	}	259	}
216		260
217	/*****************************************************************************/	261	/*****************************************************************************/
218		262
219	static int *fdchanges;
220	static int fdchangemax, fdchangecnt;
221
222	static void	263	static void
223	fd_reify (void)	264	fd_reify (EV_P)
224	{	265	{
225	int i;	266	int i;
226		267
227	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
228	{	269	{
…		…
230	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
231	struct ev_io *w;	272	struct ev_io *w;
232		273
233	int events = 0;	274	int events = 0;
234		275
235	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
236	events |= w->events;	277	events |= w->events;
237		278
238	anfd->reify = 0;	279	anfd->reify = 0;
239		280
240	if (anfd->events != events)	281	if (anfd->events != events)
241	{	282	{
242	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
243	anfd->events = events;	284	anfd->events = events;
244	}	285	}
245	}	286	}
246		287
247	fdchangecnt = 0;	288	fdchangecnt = 0;
248	}	289	}
249		290
250	static void	291	static void
251	fd_change (int fd)	292	fd_change (EV_P_ int fd)
252	{	293	{
253	if (anfds [fd].reify || fdchangecnt < 0)	294	if (anfds [fd].reify || fdchangecnt < 0)
254	return;	295	return;
255		296
256	anfds [fd].reify = 1;	297	anfds [fd].reify = 1;
…		…
258	++fdchangecnt;	299	++fdchangecnt;
259	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
260	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
261	}	302	}
262		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		313	}
		314	}
		315
263	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
264	static void	317	static void
265	fd_recheck (void)	318	fd_ebadf (EV_P)
266	{	319	{
267	int fd;	320	int fd;
268		321
269	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
270	if (anfds [fd].events)	323	if (anfds [fd].events)
271	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
272	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
273	{	336	{
274	ev_io_stop (anfds [fd].head);	337	close (fd);
275	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	338	fd_kill (EV_A_ fd);
		339	return;
276	}	340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
277	}	356	}
278		357
279	/*****************************************************************************/	358	/*****************************************************************************/
280		359
281	static struct ev_timer **timers;
282	static int timermax, timercnt;
283
284	static struct ev_periodic **periodics;
285	static int periodicmax, periodiccnt;
286
287	static void	360	static void
288	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
289	{	362	{
290	WT w = timers [k];	363	WT w = heap [k];
291		364
292	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
293	{	366	{
294	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
295	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
296	k >>= 1;	369	k >>= 1;
297	}	370	}
298		371
299	timers [k] = w;	372	heap [k] = w;
300	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
301		374
302	}	375	}
303		376
304	static void	377	static void
305	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
306	{	379	{
307	WT w = timers [k];	380	WT w = heap [k];
308		381
309	while (k < (N >> 1))	382	while (k < (N >> 1))
310	{	383	{
311	int j = k << 1;	384	int j = k << 1;
312		385
313	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
314	++j;	387	++j;
315		388
316	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
317	break;	390	break;
318		391
319	timers [k] = timers [j];	392	heap [k] = heap [j];
320	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
321	k = j;	394	k = j;
322	}	395	}
323		396
324	timers [k] = w;	397	heap [k] = w;
325	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
326	}	399	}
327		400
328	/*****************************************************************************/	401	/*****************************************************************************/
329		402
330	typedef struct	403	typedef struct
331	{	404	{
332	struct ev_signal *head;	405	struct ev_watcher_list *head;
333	sig_atomic_t volatile gotsig;	406	sig_atomic_t volatile gotsig;
334	} ANSIG;	407	} ANSIG;
335		408
336	static ANSIG *signals;	409	static ANSIG *signals;
337	static int signalmax;	410	static int signalmax;
338		411
339	static int sigpipe [2];	412	static int sigpipe [2];
340	static sig_atomic_t volatile gotsig;	413	static sig_atomic_t volatile gotsig;
341	static struct ev_io sigev;
342		414
343	static void	415	static void
344	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
345	{	417	{
346	while (count--)	418	while (count--)
…		…
357	{	429	{
358	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
359		431
360	if (!gotsig)	432	if (!gotsig)
361	{	433	{
		434	int old_errno = errno;
362	gotsig = 1;	435	gotsig = 1;
363	write (sigpipe [1], &signum, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
364	}	438	}
365	}	439	}
366		440
367	static void	441	static void
368	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
369	{	443	{
370	struct ev_signal *w;	444	struct ev_watcher_list *w;
371	int signum;	445	int signum;
372		446
373	read (sigpipe [0], &revents, 1);	447	read (sigpipe [0], &revents, 1);
374	gotsig = 0;	448	gotsig = 0;
375		449
…		…
377	if (signals [signum].gotsig)	451	if (signals [signum].gotsig)
378	{	452	{
379	signals [signum].gotsig = 0;	453	signals [signum].gotsig = 0;
380		454
381	for (w = signals [signum].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
382	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
383	}	457	}
384	}	458	}
385		459
386	static void	460	static void
387	siginit (void)	461	siginit (EV_P)
388	{	462	{
		463	#ifndef WIN32
389	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391		466
392	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
393	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
395		471
396	ev_io_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
397	ev_io_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
398	}	475	}
399		476
400	/*****************************************************************************/	477	/*****************************************************************************/
401		478
402	static struct ev_idle **idles;	479	#ifndef WIN32
403	static int idlemax, idlecnt;
404
405	static struct ev_prepare **prepares;
406	static int preparemax, preparecnt;
407
408	static struct ev_check **checks;
409	static int checkmax, checkcnt;
410
411	/*****************************************************************************/
412
413	static struct ev_child *childs [PID_HASHSIZE];
414	static struct ev_signal childev;
415		480
416	#ifndef WCONTINUED	481	#ifndef WCONTINUED
417	# define WCONTINUED 0	482	# define WCONTINUED 0
418	#endif	483	#endif
419		484
420	static void	485	static void
421	childcb (struct ev_signal *sw, int revents)	486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
422	{	487	{
423	struct ev_child *w;	488	struct ev_child *w;
		489
		490	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		491	if (w->pid == pid || !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it *now* */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
424	int pid, status;	503	int pid, status;
425		504
426	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	505	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
427	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	506	{
428	if (w->pid == pid || w->pid == -1)	507	/* make sure we are called again until all childs have been reaped */
429	{	508	event (EV_A_ (W)sw, EV_SIGNAL);
430	w->status = status;	509
431	event ((W)w, EV_CHILD);	510	child_reap (EV_A_ sw, pid, pid, status);
432	}	511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
433	}	513	}
		514
		515	#endif
434		516
435	/*****************************************************************************/	517	/*****************************************************************************/
436		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
437	#if EV_USE_EPOLL	522	#if EV_USE_EPOLL
438	# include "ev_epoll.c"	523	# include "ev_epoll.c"
439	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
440	#if EV_USE_SELECT	528	#if EV_USE_SELECT
441	# include "ev_select.c"	529	# include "ev_select.c"
442	#endif	530	#endif
443		531
444	int	532	int
…		…
451	ev_version_minor (void)	539	ev_version_minor (void)
452	{	540	{
453	return EV_VERSION_MINOR;	541	return EV_VERSION_MINOR;
454	}	542	}
455		543
456	int ev_init (int flags)	544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
457	{	547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	|| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
458	if (!ev_method)	565	if (!method)
459	{	566	{
460	#if EV_USE_MONOTONIC	567	#if EV_USE_MONOTONIC
461	{	568	{
462	struct timespec ts;	569	struct timespec ts;
463	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
464	have_monotonic = 1;	571	have_monotonic = 1;
465	}	572	}
466	#endif	573	#endif
467		574
468	ev_now = ev_time ();	575	rt_now = ev_time ();
469	now = get_clock ();	576	mn_now = get_clock ();
		577	now_floor = mn_now;
470	diff = ev_now - now;	578	rtmn_diff = rt_now - mn_now;
471		579
472	if (pipe (sigpipe))	580	if (methods == EVMETHOD_AUTO)
473	return 0;	581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
474		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
475	ev_method = EVMETHOD_NONE;	584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
476	#if EV_USE_EPOLL	590	#if EV_USE_EPOLL
477	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
478	#endif	595	#endif
479	#if EV_USE_SELECT	596	#if EV_USE_SELECT
480	if (ev_method == EVMETHOD_NONE) select_init (flags);	597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
481	#endif	598	#endif
		599	}
		600	}
482		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/*TODO*/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/*TODO*/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
		676	if (pipe (sigpipe))
		677	return 0;
		678
		679	if (!default_loop)
		680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
483	if (ev_method)	689	if (ev_method (EV_A))
484	{	690	{
485	ev_watcher_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
486	siginit ();	693	siginit (EV_A);
487		694
		695	#ifndef WIN32
488	ev_signal_init (&childev, childcb, SIGCHLD);	696	ev_signal_init (&childev, childcb, SIGCHLD);
		697	ev_set_priority (&childev, EV_MAXPRI);
489	ev_signal_start (&childev);	698	ev_signal_start (EV_A_ &childev);
		699	ev_unref (EV_A); /* child watcher should not keep loop alive */
		700	#endif
490	}	701	}
		702	else
		703	default_loop = 0;
491	}	704	}
492		705
493	return ev_method;	706	return default_loop;
494	}	707	}
495		708
496	/*****************************************************************************/
497
498	void	709	void
499	ev_fork_prepare (void)	710	ev_default_destroy (void)
500	{	711	{
501	/* nop */	712	#if EV_MULTIPLICITY
502	}	713	struct ev_loop *loop = default_loop;
503
504	void
505	ev_fork_parent (void)
506	{
507	/* nop */
508	}
509
510	void
511	ev_fork_child (void)
512	{
513	#if EV_USE_EPOLL
514	if (ev_method == EVMETHOD_EPOLL)
515	epoll_postfork_child ();
516	#endif	714	#endif
517		715
		716	ev_ref (EV_A); /* child watcher */
		717	ev_signal_stop (EV_A_ &childev);
		718
		719	ev_ref (EV_A); /* signal watcher */
518	ev_io_stop (&sigev);	720	ev_io_stop (EV_A_ &sigev);
		721
		722	close (sigpipe [0]); sigpipe [0] = 0;
		723	close (sigpipe [1]); sigpipe [1] = 0;
		724
		725	loop_destroy (EV_A);
		726	}
		727
		728	void
		729	ev_default_fork (EV_P)
		730	{
		731	loop_fork (EV_A);
		732
		733	ev_io_stop (EV_A_ &sigev);
519	close (sigpipe [0]);	734	close (sigpipe [0]);
520	close (sigpipe [1]);	735	close (sigpipe [1]);
521	pipe (sigpipe);	736	pipe (sigpipe);
		737
		738	ev_ref (EV_A); /* signal watcher */
522	siginit ();	739	siginit (EV_A);
523	}	740	}
524		741
525	/*****************************************************************************/	742	/*****************************************************************************/
526		743
527	static void	744	static void
528	call_pending (void)	745	call_pending (EV_P)
529	{	746	{
		747	int pri;
		748
		749	for (pri = NUMPRI; pri--; )
530	while (pendingcnt)	750	while (pendingcnt [pri])
531	{	751	{
532	ANPENDING *p = pendings + --pendingcnt;	752	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
533		753
534	if (p->w)	754	if (p->w)
535	{	755	{
536	p->w->pending = 0;	756	p->w->pending = 0;
537	p->w->cb (p->w, p->events);	757	p->w->cb (EV_A_ p->w, p->events);
538	}	758	}
539	}	759	}
540	}	760	}
541		761
542	static void	762	static void
543	timers_reify (void)	763	timers_reify (EV_P)
544	{	764	{
545	while (timercnt && timers [0]->at <= now)	765	while (timercnt && timers [0]->at <= mn_now)
546	{	766	{
547	struct ev_timer *w = timers [0];	767	struct ev_timer *w = timers [0];
548		768
549	/* first reschedule or stop timer */	769	/* first reschedule or stop timer */
550	if (w->repeat)	770	if (w->repeat)
551	{	771	{
552	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	772	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
553	w->at = now + w->repeat;	773	w->at = mn_now + w->repeat;
554	downheap ((WT *)timers, timercnt, 0);	774	downheap ((WT *)timers, timercnt, 0);
555	}	775	}
556	else	776	else
557	ev_timer_stop (w); /* nonrepeating: stop timer */	777	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
558		778
559	event ((W)w, EV_TIMEOUT);	779	event (EV_A_ (W)w, EV_TIMEOUT);
560	}	780	}
561	}	781	}
562		782
563	static void	783	static void
564	periodics_reify (void)	784	periodics_reify (EV_P)
565	{	785	{
566	while (periodiccnt && periodics [0]->at <= ev_now)	786	while (periodiccnt && periodics [0]->at <= rt_now)
567	{	787	{
568	struct ev_periodic *w = periodics [0];	788	struct ev_periodic *w = periodics [0];
569		789
570	/* first reschedule or stop timer */	790	/* first reschedule or stop timer */
571	if (w->interval)	791	if (w->interval)
572	{	792	{
573	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	793	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
574	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	794	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
575	downheap ((WT *)periodics, periodiccnt, 0);	795	downheap ((WT *)periodics, periodiccnt, 0);
576	}	796	}
577	else	797	else
578	ev_periodic_stop (w); /* nonrepeating: stop timer */	798	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
579		799
580	event ((W)w, EV_PERIODIC);	800	event (EV_A_ (W)w, EV_PERIODIC);
581	}	801	}
582	}	802	}
583		803
584	static void	804	static void
585	periodics_reschedule (ev_tstamp diff)	805	periodics_reschedule (EV_P)
586	{	806	{
587	int i;	807	int i;
588		808
589	/* adjust periodics after time jump */	809	/* adjust periodics after time jump */
590	for (i = 0; i < periodiccnt; ++i)	810	for (i = 0; i < periodiccnt; ++i)
591	{	811	{
592	struct ev_periodic *w = periodics [i];	812	struct ev_periodic *w = periodics [i];
593		813
594	if (w->interval)	814	if (w->interval)
595	{	815	{
596	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	816	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
597		817
598	if (fabs (diff) >= 1e-4)	818	if (fabs (diff) >= 1e-4)
599	{	819	{
600	ev_periodic_stop (w);	820	ev_periodic_stop (EV_A_ w);
601	ev_periodic_start (w);	821	ev_periodic_start (EV_A_ w);
602		822
603	i = 0; /* restart loop, inefficient, but time jumps should be rare */	823	i = 0; /* restart loop, inefficient, but time jumps should be rare */
604	}	824	}
605	}	825	}
606	}	826	}
607	}	827	}
608		828
		829	inline int
		830	time_update_monotonic (EV_P)
		831	{
		832	mn_now = get_clock ();
		833
		834	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		835	{
		836	rt_now = rtmn_diff + mn_now;
		837	return 0;
		838	}
		839	else
		840	{
		841	now_floor = mn_now;
		842	rt_now = ev_time ();
		843	return 1;
		844	}
		845	}
		846
609	static void	847	static void
610	time_update (void)	848	time_update (EV_P)
611	{	849	{
612	int i;	850	int i;
613		851
614	ev_now = ev_time ();	852	#if EV_USE_MONOTONIC
615
616	if (have_monotonic)	853	if (expect_true (have_monotonic))
617	{	854	{
618	ev_tstamp odiff = diff;	855	if (time_update_monotonic (EV_A))
619
620	for (i = 4; --i; ) /* loop a few times, before making important decisions */
621	{	856	{
622	now = get_clock ();	857	ev_tstamp odiff = rtmn_diff;
		858
		859	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		860	{
623	diff = ev_now - now;	861	rtmn_diff = rt_now - mn_now;
624		862
625	if (fabs (odiff - diff) < MIN_TIMEJUMP)	863	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
626	return; /* all is well */	864	return; /* all is well */
627		865
628	ev_now = ev_time ();	866	rt_now = ev_time ();
		867	mn_now = get_clock ();
		868	now_floor = mn_now;
		869	}
		870
		871	periodics_reschedule (EV_A);
		872	/* no timer adjustment, as the monotonic clock doesn't jump */
		873	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
629	}	874	}
630
631	periodics_reschedule (diff - odiff);
632	/* no timer adjustment, as the monotonic clock doesn't jump */
633	}	875	}
634	else	876	else
		877	#endif
635	{	878	{
636	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	879	rt_now = ev_time ();
		880
		881	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
637	{	882	{
638	periodics_reschedule (ev_now - now);	883	periodics_reschedule (EV_A);
639		884
640	/* adjust timers. this is easy, as the offset is the same for all */	885	/* adjust timers. this is easy, as the offset is the same for all */
641	for (i = 0; i < timercnt; ++i)	886	for (i = 0; i < timercnt; ++i)
642	timers [i]->at += diff;	887	timers [i]->at += rt_now - mn_now;
643	}	888	}
644		889
645	now = ev_now;	890	mn_now = rt_now;
646	}	891	}
647	}	892	}
648		893
649	int ev_loop_done;	894	void
		895	ev_ref (EV_P)
		896	{
		897	++activecnt;
		898	}
650		899
		900	void
		901	ev_unref (EV_P)
		902	{
		903	--activecnt;
		904	}
		905
		906	static int loop_done;
		907
		908	void
651	void ev_loop (int flags)	909	ev_loop (EV_P_ int flags)
652	{	910	{
653	double block;	911	double block;
654	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	912	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
655		913
656	do	914	do
657	{	915	{
658	/* queue check watchers (and execute them) */	916	/* queue check watchers (and execute them) */
659	if (preparecnt)	917	if (expect_false (preparecnt))
660	{	918	{
661	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	919	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662	call_pending ();	920	call_pending (EV_A);
663	}	921	}
664		922
665	/* update fd-related kernel structures */	923	/* update fd-related kernel structures */
666	fd_reify ();	924	fd_reify (EV_A);
667		925
668	/* calculate blocking time */	926	/* calculate blocking time */
669		927
670	/* we only need this for !monotonic clockor timers, but as we basically	928	/* we only need this for !monotonic clockor timers, but as we basically
671	always have timers, we just calculate it always */	929	always have timers, we just calculate it always */
		930	#if EV_USE_MONOTONIC
		931	if (expect_true (have_monotonic))
		932	time_update_monotonic (EV_A);
		933	else
		934	#endif
		935	{
672	ev_now = ev_time ();	936	rt_now = ev_time ();
		937	mn_now = rt_now;
		938	}
673		939
674	if (flags & EVLOOP_NONBLOCK || idlecnt)	940	if (flags & EVLOOP_NONBLOCK || idlecnt)
675	block = 0.;	941	block = 0.;
676	else	942	else
677	{	943	{
678	block = MAX_BLOCKTIME;	944	block = MAX_BLOCKTIME;
679		945
680	if (timercnt)	946	if (timercnt)
681	{	947	{
682	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	948	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
683	if (block > to) block = to;	949	if (block > to) block = to;
684	}	950	}
685		951
686	if (periodiccnt)	952	if (periodiccnt)
687	{	953	{
688	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	954	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
689	if (block > to) block = to;	955	if (block > to) block = to;
690	}	956	}
691		957
692	if (block < 0.) block = 0.;	958	if (block < 0.) block = 0.;
693	}	959	}
694		960
695	method_poll (block);	961	method_poll (EV_A_ block);
696		962
697	/* update ev_now, do magic */	963	/* update rt_now, do magic */
698	time_update ();	964	time_update (EV_A);
699		965
700	/* queue pending timers and reschedule them */	966	/* queue pending timers and reschedule them */
701	timers_reify (); /* relative timers called last */	967	timers_reify (EV_A); /* relative timers called last */
702	periodics_reify (); /* absolute timers called first */	968	periodics_reify (EV_A); /* absolute timers called first */
703		969
704	/* queue idle watchers unless io or timers are pending */	970	/* queue idle watchers unless io or timers are pending */
705	if (!pendingcnt)	971	if (!pendingcnt)
706	queue_events ((W *)idles, idlecnt, EV_IDLE);	972	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
707		973
708	/* queue check watchers, to be executed first */	974	/* queue check watchers, to be executed first */
709	if (checkcnt)	975	if (checkcnt)
710	queue_events ((W *)checks, checkcnt, EV_CHECK);	976	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711		977
712	call_pending ();	978	call_pending (EV_A);
713	}	979	}
714	while (!ev_loop_done);	980	while (activecnt && !loop_done);
715		981
716	if (ev_loop_done != 2)	982	if (loop_done != 2)
717	ev_loop_done = 0;	983	loop_done = 0;
		984	}
		985
		986	void
		987	ev_unloop (EV_P_ int how)
		988	{
		989	loop_done = how;
718	}	990	}
719		991
720	/*****************************************************************************/	992	/*****************************************************************************/
721		993
722	static void	994	inline void
723	wlist_add (WL *head, WL elem)	995	wlist_add (WL *head, WL elem)
724	{	996	{
725	elem->next = *head;	997	elem->next = *head;
726	*head = elem;	998	*head = elem;
727	}	999	}
728		1000
729	static void	1001	inline void
730	wlist_del (WL *head, WL elem)	1002	wlist_del (WL *head, WL elem)
731	{	1003	{
732	while (*head)	1004	while (*head)
733	{	1005	{
734	if (*head == elem)	1006	if (*head == elem)
…		…
739		1011
740	head = &(*head)->next;	1012	head = &(*head)->next;
741	}	1013	}
742	}	1014	}
743		1015
744	static void	1016	inline void
745	ev_clear_pending (W w)	1017	ev_clear_pending (EV_P_ W w)
746	{	1018	{
747	if (w->pending)	1019	if (w->pending)
748	{	1020	{
749	pendings [w->pending - 1].w = 0;	1021	pendings [ABSPRI (w)][w->pending - 1].w = 0;
750	w->pending = 0;	1022	w->pending = 0;
751	}	1023	}
752	}	1024	}
753		1025
754	static void	1026	inline void
755	ev_start (W w, int active)	1027	ev_start (EV_P_ W w, int active)
756	{	1028	{
		1029	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1030	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1031
757	w->active = active;	1032	w->active = active;
		1033	ev_ref (EV_A);
758	}	1034	}
759		1035
760	static void	1036	inline void
761	ev_stop (W w)	1037	ev_stop (EV_P_ W w)
762	{	1038	{
		1039	ev_unref (EV_A);
763	w->active = 0;	1040	w->active = 0;
764	}	1041	}
765		1042
766	/*****************************************************************************/	1043	/*****************************************************************************/
767		1044
768	void	1045	void
769	ev_io_start (struct ev_io *w)	1046	ev_io_start (EV_P_ struct ev_io *w)
770	{	1047	{
771	int fd = w->fd;	1048	int fd = w->fd;
772		1049
773	if (ev_is_active (w))	1050	if (ev_is_active (w))
774	return;	1051	return;
775		1052
776	assert (("ev_io_start called with negative fd", fd >= 0));	1053	assert (("ev_io_start called with negative fd", fd >= 0));
777		1054
778	ev_start ((W)w, 1);	1055	ev_start (EV_A_ (W)w, 1);
779	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1056	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
780	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1057	wlist_add ((WL *)&anfds[fd].head, (WL)w);
781		1058
782	fd_change (fd);	1059	fd_change (EV_A_ fd);
783	}	1060	}
784		1061
785	void	1062	void
786	ev_io_stop (struct ev_io *w)	1063	ev_io_stop (EV_P_ struct ev_io *w)
787	{	1064	{
788	ev_clear_pending ((W)w);	1065	ev_clear_pending (EV_A_ (W)w);
789	if (!ev_is_active (w))	1066	if (!ev_is_active (w))
790	return;	1067	return;
791		1068
792	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1069	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
793	ev_stop ((W)w);	1070	ev_stop (EV_A_ (W)w);
794		1071
795	fd_change (w->fd);	1072	fd_change (EV_A_ w->fd);
796	}	1073	}
797		1074
798	void	1075	void
799	ev_timer_start (struct ev_timer *w)	1076	ev_timer_start (EV_P_ struct ev_timer *w)
800	{	1077	{
801	if (ev_is_active (w))	1078	if (ev_is_active (w))
802	return;	1079	return;
803		1080
804	w->at += now;	1081	w->at += mn_now;
805		1082
806	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1083	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807		1084
808	ev_start ((W)w, ++timercnt);	1085	ev_start (EV_A_ (W)w, ++timercnt);
809	array_needsize (timers, timermax, timercnt, );	1086	array_needsize (timers, timermax, timercnt, );
810	timers [timercnt - 1] = w;	1087	timers [timercnt - 1] = w;
811	upheap ((WT *)timers, timercnt - 1);	1088	upheap ((WT *)timers, timercnt - 1);
812	}	1089	}
813		1090
814	void	1091	void
815	ev_timer_stop (struct ev_timer *w)	1092	ev_timer_stop (EV_P_ struct ev_timer *w)
816	{	1093	{
817	ev_clear_pending ((W)w);	1094	ev_clear_pending (EV_A_ (W)w);
818	if (!ev_is_active (w))	1095	if (!ev_is_active (w))
819	return;	1096	return;
820		1097
821	if (w->active < timercnt--)	1098	if (w->active < timercnt--)
822	{	1099	{
…		…
824	downheap ((WT *)timers, timercnt, w->active - 1);	1101	downheap ((WT *)timers, timercnt, w->active - 1);
825	}	1102	}
826		1103
827	w->at = w->repeat;	1104	w->at = w->repeat;
828		1105
829	ev_stop ((W)w);	1106	ev_stop (EV_A_ (W)w);
830	}	1107	}
831		1108
832	void	1109	void
833	ev_timer_again (struct ev_timer *w)	1110	ev_timer_again (EV_P_ struct ev_timer *w)
834	{	1111	{
835	if (ev_is_active (w))	1112	if (ev_is_active (w))
836	{	1113	{
837	if (w->repeat)	1114	if (w->repeat)
838	{	1115	{
839	w->at = now + w->repeat;	1116	w->at = mn_now + w->repeat;
840	downheap ((WT *)timers, timercnt, w->active - 1);	1117	downheap ((WT *)timers, timercnt, w->active - 1);
841	}	1118	}
842	else	1119	else
843	ev_timer_stop (w);	1120	ev_timer_stop (EV_A_ w);
844	}	1121	}
845	else if (w->repeat)	1122	else if (w->repeat)
846	ev_timer_start (w);	1123	ev_timer_start (EV_A_ w);
847	}	1124	}
848		1125
849	void	1126	void
850	ev_periodic_start (struct ev_periodic *w)	1127	ev_periodic_start (EV_P_ struct ev_periodic *w)
851	{	1128	{
852	if (ev_is_active (w))	1129	if (ev_is_active (w))
853	return;	1130	return;
854		1131
855	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1132	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
856		1133
857	/* this formula differs from the one in periodic_reify because we do not always round up */	1134	/* this formula differs from the one in periodic_reify because we do not always round up */
858	if (w->interval)	1135	if (w->interval)
859	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1136	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
860		1137
861	ev_start ((W)w, ++periodiccnt);	1138	ev_start (EV_A_ (W)w, ++periodiccnt);
862	array_needsize (periodics, periodicmax, periodiccnt, );	1139	array_needsize (periodics, periodicmax, periodiccnt, );
863	periodics [periodiccnt - 1] = w;	1140	periodics [periodiccnt - 1] = w;
864	upheap ((WT *)periodics, periodiccnt - 1);	1141	upheap ((WT *)periodics, periodiccnt - 1);
865	}	1142	}
866		1143
867	void	1144	void
868	ev_periodic_stop (struct ev_periodic *w)	1145	ev_periodic_stop (EV_P_ struct ev_periodic *w)
869	{	1146	{
870	ev_clear_pending ((W)w);	1147	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1148	if (!ev_is_active (w))
872	return;	1149	return;
873		1150
874	if (w->active < periodiccnt--)	1151	if (w->active < periodiccnt--)
875	{	1152	{
876	periodics [w->active - 1] = periodics [periodiccnt];	1153	periodics [w->active - 1] = periodics [periodiccnt];
877	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1154	downheap ((WT *)periodics, periodiccnt, w->active - 1);
878	}	1155	}
879		1156
880	ev_stop ((W)w);	1157	ev_stop (EV_A_ (W)w);
881	}	1158	}
882		1159
883	void	1160	void
884	ev_signal_start (struct ev_signal *w)	1161	ev_idle_start (EV_P_ struct ev_idle *w)
885	{	1162	{
886	if (ev_is_active (w))	1163	if (ev_is_active (w))
887	return;	1164	return;
888		1165
		1166	ev_start (EV_A_ (W)w, ++idlecnt);
		1167	array_needsize (idles, idlemax, idlecnt, );
		1168	idles [idlecnt - 1] = w;
		1169	}
		1170
		1171	void
		1172	ev_idle_stop (EV_P_ struct ev_idle *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (ev_is_active (w))
		1176	return;
		1177
		1178	idles [w->active - 1] = idles [--idlecnt];
		1179	ev_stop (EV_A_ (W)w);
		1180	}
		1181
		1182	void
		1183	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1184	{
		1185	if (ev_is_active (w))
		1186	return;
		1187
		1188	ev_start (EV_A_ (W)w, ++preparecnt);
		1189	array_needsize (prepares, preparemax, preparecnt, );
		1190	prepares [preparecnt - 1] = w;
		1191	}
		1192
		1193	void
		1194	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1195	{
		1196	ev_clear_pending (EV_A_ (W)w);
		1197	if (ev_is_active (w))
		1198	return;
		1199
		1200	prepares [w->active - 1] = prepares [--preparecnt];
		1201	ev_stop (EV_A_ (W)w);
		1202	}
		1203
		1204	void
		1205	ev_check_start (EV_P_ struct ev_check *w)
		1206	{
		1207	if (ev_is_active (w))
		1208	return;
		1209
		1210	ev_start (EV_A_ (W)w, ++checkcnt);
		1211	array_needsize (checks, checkmax, checkcnt, );
		1212	checks [checkcnt - 1] = w;
		1213	}
		1214
		1215	void
		1216	ev_check_stop (EV_P_ struct ev_check *w)
		1217	{
		1218	ev_clear_pending (EV_A_ (W)w);
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	checks [w->active - 1] = checks [--checkcnt];
		1223	ev_stop (EV_A_ (W)w);
		1224	}
		1225
		1226	#ifndef SA_RESTART
		1227	# define SA_RESTART 0
		1228	#endif
		1229
		1230	void
		1231	ev_signal_start (EV_P_ struct ev_signal *w)
		1232	{
		1233	#if EV_MULTIPLICITY
		1234	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1235	#endif
		1236	if (ev_is_active (w))
		1237	return;
		1238
889	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1239	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
890		1240
891	ev_start ((W)w, 1);	1241	ev_start (EV_A_ (W)w, 1);
892	array_needsize (signals, signalmax, w->signum, signals_init);	1242	array_needsize (signals, signalmax, w->signum, signals_init);
893	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1243	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
894		1244
895	if (!w->next)	1245	if (!w->next)
896	{	1246	{
897	struct sigaction sa;	1247	struct sigaction sa;
898	sa.sa_handler = sighandler;	1248	sa.sa_handler = sighandler;
899	sigfillset (&sa.sa_mask);	1249	sigfillset (&sa.sa_mask);
900	sa.sa_flags = 0;	1250	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901	sigaction (w->signum, &sa, 0);	1251	sigaction (w->signum, &sa, 0);
902	}	1252	}
903	}	1253	}
904		1254
905	void	1255	void
906	ev_signal_stop (struct ev_signal *w)	1256	ev_signal_stop (EV_P_ struct ev_signal *w)
907	{	1257	{
908	ev_clear_pending ((W)w);	1258	ev_clear_pending (EV_A_ (W)w);
909	if (!ev_is_active (w))	1259	if (!ev_is_active (w))
910	return;	1260	return;
911		1261
912	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1262	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
913	ev_stop ((W)w);	1263	ev_stop (EV_A_ (W)w);
914		1264
915	if (!signals [w->signum - 1].head)	1265	if (!signals [w->signum - 1].head)
916	signal (w->signum, SIG_DFL);	1266	signal (w->signum, SIG_DFL);
917	}	1267	}
918		1268
919	void	1269	void
920	ev_idle_start (struct ev_idle *w)	1270	ev_child_start (EV_P_ struct ev_child *w)
921	{	1271	{
		1272	#if EV_MULTIPLICITY
		1273	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1274	#endif
922	if (ev_is_active (w))	1275	if (ev_is_active (w))
923	return;	1276	return;
924		1277
925	ev_start ((W)w, ++idlecnt);	1278	ev_start (EV_A_ (W)w, 1);
926	array_needsize (idles, idlemax, idlecnt, );	1279	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
927	idles [idlecnt - 1] = w;
928	}	1280	}
929		1281
930	void	1282	void
931	ev_idle_stop (struct ev_idle *w)	1283	ev_child_stop (EV_P_ struct ev_child *w)
932	{	1284	{
933	ev_clear_pending ((W)w);	1285	ev_clear_pending (EV_A_ (W)w);
934	if (ev_is_active (w))	1286	if (ev_is_active (w))
935	return;	1287	return;
936		1288
937	idles [w->active - 1] = idles [--idlecnt];
938	ev_stop ((W)w);
939	}
940
941	void
942	ev_prepare_start (struct ev_prepare *w)
943	{
944	if (ev_is_active (w))
945	return;
946
947	ev_start ((W)w, ++preparecnt);
948	array_needsize (prepares, preparemax, preparecnt, );
949	prepares [preparecnt - 1] = w;
950	}
951
952	void
953	ev_prepare_stop (struct ev_prepare *w)
954	{
955	ev_clear_pending ((W)w);
956	if (ev_is_active (w))
957	return;
958
959	prepares [w->active - 1] = prepares [--preparecnt];
960	ev_stop ((W)w);
961	}
962
963	void
964	ev_check_start (struct ev_check *w)
965	{
966	if (ev_is_active (w))
967	return;
968
969	ev_start ((W)w, ++checkcnt);
970	array_needsize (checks, checkmax, checkcnt, );
971	checks [checkcnt - 1] = w;
972	}
973
974	void
975	ev_check_stop (struct ev_check *w)
976	{
977	ev_clear_pending ((W)w);
978	if (ev_is_active (w))
979	return;
980
981	checks [w->active - 1] = checks [--checkcnt];
982	ev_stop ((W)w);
983	}
984
985	void
986	ev_child_start (struct ev_child *w)
987	{
988	if (ev_is_active (w))
989	return;
990
991	ev_start ((W)w, 1);
992	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
993	}
994
995	void
996	ev_child_stop (struct ev_child *w)
997	{
998	ev_clear_pending ((W)w);
999	if (ev_is_active (w))
1000	return;
1001
1002	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1289	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1003	ev_stop ((W)w);	1290	ev_stop (EV_A_ (W)w);
1004	}	1291	}
1005		1292
1006	/*****************************************************************************/	1293	/*****************************************************************************/
1007		1294
1008	struct ev_once	1295	struct ev_once
…		…
1012	void (*cb)(int revents, void *arg);	1299	void (*cb)(int revents, void *arg);
1013	void *arg;	1300	void *arg;
1014	};	1301	};
1015		1302
1016	static void	1303	static void
1017	once_cb (struct ev_once *once, int revents)	1304	once_cb (EV_P_ struct ev_once *once, int revents)
1018	{	1305	{
1019	void (*cb)(int revents, void *arg) = once->cb;	1306	void (*cb)(int revents, void *arg) = once->cb;
1020	void *arg = once->arg;	1307	void *arg = once->arg;
1021		1308
1022	ev_io_stop (&once->io);	1309	ev_io_stop (EV_A_ &once->io);
1023	ev_timer_stop (&once->to);	1310	ev_timer_stop (EV_A_ &once->to);
1024	free (once);	1311	free (once);
1025		1312
1026	cb (revents, arg);	1313	cb (revents, arg);
1027	}	1314	}
1028		1315
1029	static void	1316	static void
1030	once_cb_io (struct ev_io *w, int revents)	1317	once_cb_io (EV_P_ struct ev_io *w, int revents)
1031	{	1318	{
1032	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1319	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1033	}	1320	}
1034		1321
1035	static void	1322	static void
1036	once_cb_to (struct ev_timer *w, int revents)	1323	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1037	{	1324	{
1038	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1325	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1039	}	1326	}
1040		1327
1041	void	1328	void
1042	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1329	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1043	{	1330	{
1044	struct ev_once *once = malloc (sizeof (struct ev_once));	1331	struct ev_once *once = malloc (sizeof (struct ev_once));
1045		1332
1046	if (!once)	1333	if (!once)
1047	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1334	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1052		1339
1053	ev_watcher_init (&once->io, once_cb_io);	1340	ev_watcher_init (&once->io, once_cb_io);
1054	if (fd >= 0)	1341	if (fd >= 0)
1055	{	1342	{
1056	ev_io_set (&once->io, fd, events);	1343	ev_io_set (&once->io, fd, events);
1057	ev_io_start (&once->io);	1344	ev_io_start (EV_A_ &once->io);
1058	}	1345	}
1059		1346
1060	ev_watcher_init (&once->to, once_cb_to);	1347	ev_watcher_init (&once->to, once_cb_to);
1061	if (timeout >= 0.)	1348	if (timeout >= 0.)
1062	{	1349	{
1063	ev_timer_set (&once->to, timeout, 0.);	1350	ev_timer_set (&once->to, timeout, 0.);
1064	ev_timer_start (&once->to);	1351	ev_timer_start (EV_A_ &once->to);
1065	}	1352	}
1066	}	1353	}
1067	}	1354	}
1068		1355
1069	/*****************************************************************************/
1070
1071	#if 0
1072
1073	struct ev_io wio;
1074
1075	static void
1076	sin_cb (struct ev_io *w, int revents)
1077	{
1078	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1079	}
1080
1081	static void
1082	ocb (struct ev_timer *w, int revents)
1083	{
1084	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1085	ev_timer_stop (w);
1086	ev_timer_start (w);
1087	}
1088
1089	static void
1090	scb (struct ev_signal *w, int revents)
1091	{
1092	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1093	ev_io_stop (&wio);
1094	ev_io_start (&wio);
1095	}
1096
1097	static void
1098	gcb (struct ev_signal *w, int revents)
1099	{
1100	fprintf (stderr, "generic %x\n", revents);
1101
1102	}
1103
1104	int main (void)
1105	{
1106	ev_init (0);
1107
1108	ev_io_init (&wio, sin_cb, 0, EV_READ);
1109	ev_io_start (&wio);
1110
1111	struct ev_timer t[10000];
1112
1113	#if 0
1114	int i;
1115	for (i = 0; i < 10000; ++i)
1116	{
1117	struct ev_timer *w = t + i;
1118	ev_watcher_init (w, ocb, i);
1119	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1120	ev_timer_start (w);
1121	if (drand48 () < 0.5)
1122	ev_timer_stop (w);
1123	}
1124	#endif
1125
1126	struct ev_timer t1;
1127	ev_timer_init (&t1, ocb, 5, 10);
1128	ev_timer_start (&t1);
1129
1130	struct ev_signal sig;
1131	ev_signal_init (&sig, scb, SIGQUIT);
1132	ev_signal_start (&sig);
1133
1134	struct ev_check cw;
1135	ev_check_init (&cw, gcb);
1136	ev_check_start (&cw);
1137
1138	struct ev_idle iw;
1139	ev_idle_init (&iw, gcb);
1140	ev_idle_start (&iw);
1141
1142	ev_loop (0);
1143
1144	return 0;
1145	}
1146
1147	#endif
1148
1149
1150
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