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Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs.
Revision 1.58 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
		53	/**/
		54
51	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
54	# endif
55	#endif	57	#endif
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
63	#endif	69	#endif
64		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
65	#ifndef CLOCK_REALTIME	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	88	# define EV_USE_REALTIME 0
67	#endif	89	#endif
68	#ifndef EV_USE_REALTIME	90
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	91	/**/
70	#endif
71		92
72	#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) */
73	#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) */
74	#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 */
75	#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 */
76		97
		98	#ifndef EV_EMBED
77	#include "ev.h"	99	# include "ev.h"
		100	#endif
		101
		102	#if __GNUC__ >= 3
		103	# define expect(expr,value) __builtin_expect ((expr),(value))
		104	# define inline inline
		105	#else
		106	# define expect(expr,value) (expr)
		107	# define inline static
		108	#endif
		109
		110	#define expect_false(expr) expect ((expr) != 0, 0)
		111	#define expect_true(expr) expect ((expr) != 0, 1)
		112
		113	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		114	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
78		115
79	typedef struct ev_watcher *W;	116	typedef struct ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	117	typedef struct ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	118	typedef struct ev_watcher_time *WT;
82		119
83	static ev_tstamp now, diff; /* monotonic clock */	120	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
84	ev_tstamp ev_now;
85	int ev_method;
86
87	static int have_monotonic; /* runtime */
88
89	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
90	static void (*method_modify)(int fd, int oev, int nev);
91	static void (*method_poll)(ev_tstamp timeout);
92		121
93	/*****************************************************************************/	122	/*****************************************************************************/
94		123
95	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
96	ev_time (void)	158	ev_time (void)
97	{	159	{
98	#if EV_USE_REALTIME	160	#if EV_USE_REALTIME
99	struct timespec ts;	161	struct timespec ts;
100	clock_gettime (CLOCK_REALTIME, &ts);	162	clock_gettime (CLOCK_REALTIME, &ts);
…		…
104	gettimeofday (&tv, 0);	166	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	167	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	168	#endif
107	}	169	}
108		170
109	static ev_tstamp	171	inline ev_tstamp
110	get_clock (void)	172	get_clock (void)
111	{	173	{
112	#if EV_USE_MONOTONIC	174	#if EV_USE_MONOTONIC
113	if (have_monotonic)	175	if (expect_true (have_monotonic))
114	{	176	{
115	struct timespec ts;	177	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	178	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	179	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	180	}
119	#endif	181	#endif
120		182
121	return ev_time ();	183	return ev_time ();
122	}	184	}
123		185
		186	ev_tstamp
		187	ev_now (EV_P)
		188	{
		189	return rt_now;
		190	}
		191
124	#define array_roundsize(base,n) ((n) | 4 & ~3)	192	#define array_roundsize(base,n) ((n) | 4 & ~3)
125		193
126	#define array_needsize(base,cur,cnt,init) \	194	#define array_needsize(base,cur,cnt,init) \
127	if ((cnt) > cur) \	195	if (expect_false ((cnt) > cur)) \
128	{ \	196	{ \
129	int newcnt = cur; \	197	int newcnt = cur; \
130	do \	198	do \
131	{ \	199	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	200	newcnt = array_roundsize (base, newcnt << 1); \
…		…
138	cur = newcnt; \	206	cur = newcnt; \
139	}	207	}
140		208
141	/*****************************************************************************/	209	/*****************************************************************************/
142		210
143	typedef struct
144	{
145	struct ev_io *head;
146	unsigned char events;
147	unsigned char reify;
148	} ANFD;
149
150	static ANFD *anfds;
151	static int anfdmax;
152
153	static void	211	static void
154	anfds_init (ANFD *base, int count)	212	anfds_init (ANFD *base, int count)
155	{	213	{
156	while (count--)	214	while (count--)
157	{	215	{
…		…
161		219
162	++base;	220	++base;
163	}	221	}
164	}	222	}
165		223
166	typedef struct
167	{
168	W w;
169	int events;
170	} ANPENDING;
171
172	static ANPENDING *pendings;
173	static int pendingmax, pendingcnt;
174
175	static void	224	static void
176	event (W w, int events)	225	event (EV_P_ W w, int events)
177	{	226	{
178	if (w->pending)	227	if (w->pending)
179	{	228	{
180	pendings [w->pending - 1].events |= events;	229	pendings [ABSPRI (w)][w->pending - 1].events |= events;
181	return;	230	return;
182	}	231	}
183		232
184	w->pending = ++pendingcnt;	233	w->pending = ++pendingcnt [ABSPRI (w)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
186	pendings [pendingcnt - 1].w = w;	235	pendings [ABSPRI (w)][w->pending - 1].w = w;
187	pendings [pendingcnt - 1].events = events;	236	pendings [ABSPRI (w)][w->pending - 1].events = events;
188	}	237	}
189		238
190	static void	239	static void
191	queue_events (W *events, int eventcnt, int type)	240	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	241	{
193	int i;	242	int i;
194		243
195	for (i = 0; i < eventcnt; ++i)	244	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	245	event (EV_A_ events [i], type);
197	}	246	}
198		247
199	static void	248	static void
200	fd_event (int fd, int events)	249	fd_event (EV_P_ int fd, int events)
201	{	250	{
202	ANFD *anfd = anfds + fd;	251	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	252	struct ev_io *w;
204		253
205	for (w = anfd->head; w; w = w->next)	254	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
206	{	255	{
207	int ev = w->events & events;	256	int ev = w->events & events;
208		257
209	if (ev)	258	if (ev)
210	event ((W)w, ev);	259	event (EV_A_ (W)w, ev);
211	}	260	}
212	}	261	}
213		262
214	/*****************************************************************************/	263	/*****************************************************************************/
215		264
216	static int *fdchanges;
217	static int fdchangemax, fdchangecnt;
218
219	static void	265	static void
220	fd_reify (void)	266	fd_reify (EV_P)
221	{	267	{
222	int i;	268	int i;
223		269
224	for (i = 0; i < fdchangecnt; ++i)	270	for (i = 0; i < fdchangecnt; ++i)
225	{	271	{
…		…
227	ANFD *anfd = anfds + fd;	273	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	274	struct ev_io *w;
229		275
230	int events = 0;	276	int events = 0;
231		277
232	for (w = anfd->head; w; w = w->next)	278	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
233	events |= w->events;	279	events |= w->events;
234		280
235	anfd->reify = 0;	281	anfd->reify = 0;
236		282
237	if (anfd->events != events)	283	if (anfd->events != events)
238	{	284	{
239	method_modify (fd, anfd->events, events);	285	method_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	286	anfd->events = events;
241	}	287	}
242	}	288	}
243		289
244	fdchangecnt = 0;	290	fdchangecnt = 0;
245	}	291	}
246		292
247	static void	293	static void
248	fd_change (int fd)	294	fd_change (EV_P_ int fd)
249	{	295	{
250	if (anfds [fd].reify || fdchangecnt < 0)	296	if (anfds [fd].reify || fdchangecnt < 0)
251	return;	297	return;
252		298
253	anfds [fd].reify = 1;	299	anfds [fd].reify = 1;
…		…
255	++fdchangecnt;	301	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
257	fdchanges [fdchangecnt - 1] = fd;	303	fdchanges [fdchangecnt - 1] = fd;
258	}	304	}
259		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
260	/* called on EBADF to verify fds */	318	/* called on EBADF to verify fds */
261	static void	319	static void
262	fd_recheck (void)	320	fd_ebadf (EV_P)
263	{	321	{
264	int fd;	322	int fd;
265		323
266	for (fd = 0; fd < anfdmax; ++fd)	324	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	325	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
269	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)
270	{	338	{
271	ev_io_stop (anfds [fd].head);	339	close (fd);
272	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	340	fd_kill (EV_A_ fd);
		341	return;
273	}	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	}
274	}	358	}
275		359
276	/*****************************************************************************/	360	/*****************************************************************************/
277		361
278	static struct ev_timer **timers;
279	static int timermax, timercnt;
280
281	static struct ev_periodic **periodics;
282	static int periodicmax, periodiccnt;
283
284	static void	362	static void
285	upheap (WT *timers, int k)	363	upheap (WT *heap, int k)
286	{	364	{
287	WT w = timers [k];	365	WT w = heap [k];
288		366
289	while (k && timers [k >> 1]->at > w->at)	367	while (k && heap [k >> 1]->at > w->at)
290	{	368	{
291	timers [k] = timers [k >> 1];	369	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	370	heap [k]->active = k + 1;
293	k >>= 1;	371	k >>= 1;
294	}	372	}
295		373
296	timers [k] = w;	374	heap [k] = w;
297	timers [k]->active = k + 1;	375	heap [k]->active = k + 1;
298		376
299	}	377	}
300		378
301	static void	379	static void
302	downheap (WT *timers, int N, int k)	380	downheap (WT *heap, int N, int k)
303	{	381	{
304	WT w = timers [k];	382	WT w = heap [k];
305		383
306	while (k < (N >> 1))	384	while (k < (N >> 1))
307	{	385	{
308	int j = k << 1;	386	int j = k << 1;
309		387
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	389	++j;
312		390
313	if (w->at <= timers [j]->at)	391	if (w->at <= heap [j]->at)
314	break;	392	break;
315		393
316	timers [k] = timers [j];	394	heap [k] = heap [j];
317	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
318	k = j;	396	k = j;
319	}	397	}
320		398
321	timers [k] = w;	399	heap [k] = w;
322	timers [k]->active = k + 1;	400	heap [k]->active = k + 1;
323	}	401	}
324		402
325	/*****************************************************************************/	403	/*****************************************************************************/
326		404
327	typedef struct	405	typedef struct
328	{	406	{
329	struct ev_signal *head;	407	struct ev_watcher_list *head;
330	sig_atomic_t volatile gotsig;	408	sig_atomic_t volatile gotsig;
331	} ANSIG;	409	} ANSIG;
332		410
333	static ANSIG *signals;	411	static ANSIG *signals;
334	static int signalmax;	412	static int signalmax;
335		413
336	static int sigpipe [2];	414	static int sigpipe [2];
337	static sig_atomic_t volatile gotsig;	415	static sig_atomic_t volatile gotsig;
338	static struct ev_io sigev;
339		416
340	static void	417	static void
341	signals_init (ANSIG *base, int count)	418	signals_init (ANSIG *base, int count)
342	{	419	{
343	while (count--)	420	while (count--)
…		…
354	{	431	{
355	signals [signum - 1].gotsig = 1;	432	signals [signum - 1].gotsig = 1;
356		433
357	if (!gotsig)	434	if (!gotsig)
358	{	435	{
		436	int old_errno = errno;
359	gotsig = 1;	437	gotsig = 1;
360	write (sigpipe [1], &signum, 1);	438	write (sigpipe [1], &signum, 1);
		439	errno = old_errno;
361	}	440	}
362	}	441	}
363		442
364	static void	443	static void
365	sigcb (struct ev_io *iow, int revents)	444	sigcb (EV_P_ struct ev_io *iow, int revents)
366	{	445	{
367	struct ev_signal *w;	446	struct ev_watcher_list *w;
368	int sig;	447	int signum;
369		448
370	read (sigpipe [0], &revents, 1);	449	read (sigpipe [0], &revents, 1);
371	gotsig = 0;	450	gotsig = 0;
372		451
373	for (sig = signalmax; sig--; )	452	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	453	if (signals [signum].gotsig)
375	{	454	{
376	signals [sig].gotsig = 0;	455	signals [signum].gotsig = 0;
377		456
378	for (w = signals [sig].head; w; w = w->next)	457	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	458	event (EV_A_ (W)w, EV_SIGNAL);
380	}	459	}
381	}	460	}
382		461
383	static void	462	static void
384	siginit (void)	463	siginit (EV_P)
385	{	464	{
		465	#ifndef WIN32
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388		468
389	/* rather than sort out wether we really need nb, set it */	469	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		472	#endif
392		473
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	474	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	475	ev_io_start (EV_A_ &sigev);
		476	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	477	}
396		478
397	/*****************************************************************************/	479	/*****************************************************************************/
398		480
399	static struct ev_idle **idles;	481	#ifndef WIN32
400	static int idlemax, idlecnt;
401
402	static struct ev_prepare **prepares;
403	static int preparemax, preparecnt;
404
405	static struct ev_check **checks;
406	static int checkmax, checkcnt;
407
408	/*****************************************************************************/
409
410	static struct ev_child *childs [PID_HASHSIZE];
411	static struct ev_signal childev;
412		482
413	#ifndef WCONTINUED	483	#ifndef WCONTINUED
414	# define WCONTINUED 0	484	# define WCONTINUED 0
415	#endif	485	#endif
416		486
417	static void	487	static void
418	childcb (struct ev_signal *sw, int revents)	488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
419	{	489	{
420	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	{
421	int pid, status;	505	int pid, status;
422		506
423	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	507	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	508	{
425	if (w->pid == pid || w->pid == -1)	509	/* make sure we are called again until all childs have been reaped */
426	{	510	event (EV_A_ (W)sw, EV_SIGNAL);
427	w->status = status;	511
428	event ((W)w, EV_CHILD);	512	child_reap (EV_A_ sw, pid, pid, status);
429	}	513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		514	}
430	}	515	}
		516
		517	#endif
431		518
432	/*****************************************************************************/	519	/*****************************************************************************/
433		520
		521	#if EV_USE_KQUEUE
		522	# include "ev_kqueue.c"
		523	#endif
434	#if EV_USE_EPOLL	524	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	525	# include "ev_epoll.c"
436	#endif	526	#endif
		527	#if EV_USEV_POLL
		528	# include "ev_poll.c"
		529	#endif
437	#if EV_USE_SELECT	530	#if EV_USE_SELECT
438	# include "ev_select.c"	531	# include "ev_select.c"
439	#endif	532	#endif
440		533
441	int	534	int
…		…
448	ev_version_minor (void)	541	ev_version_minor (void)
449	{	542	{
450	return EV_VERSION_MINOR;	543	return EV_VERSION_MINOR;
451	}	544	}
452		545
453	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)
454	{	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	{
455	if (!ev_method)	567	if (!method)
456	{	568	{
457	#if EV_USE_MONOTONIC	569	#if EV_USE_MONOTONIC
458	{	570	{
459	struct timespec ts;	571	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	573	have_monotonic = 1;
462	}	574	}
463	#endif	575	#endif
464		576
465	ev_now = ev_time ();	577	rt_now = ev_time ();
466	now = get_clock ();	578	mn_now = get_clock ();
		579	now_floor = mn_now;
467	diff = ev_now - now;	580	rtmn_diff = rt_now - mn_now;
468		581
469	if (pipe (sigpipe))	582	if (methods == EVMETHOD_AUTO)
470	return 0;	583	if (!enable_secure () && getenv ("LIBEV_METHODS"))
471		584	methods = atoi (getenv ("LIBEV_METHODS"));
		585	else
472	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
473	#if EV_USE_EPOLL	592	#if EV_USE_EPOLL
474	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);
475	#endif	597	#endif
476	#if EV_USE_SELECT	598	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
478	#endif	600	#endif
		601	}
		602	}
479		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
480	if (ev_method)	691	if (ev_method (EV_A))
481	{	692	{
482	ev_watcher_init (&sigev, sigcb);	693	ev_watcher_init (&sigev, sigcb);
		694	ev_set_priority (&sigev, EV_MAXPRI);
483	siginit ();	695	siginit (EV_A);
484		696
		697	#ifndef WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	698	ev_signal_init (&childev, childcb, SIGCHLD);
		699	ev_set_priority (&childev, EV_MAXPRI);
486	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
487	}	703	}
		704	else
		705	default_loop = 0;
488	}	706	}
489		707
490	return ev_method;	708	return default_loop;
491	}	709	}
492		710
493	/*****************************************************************************/
494
495	void	711	void
496	ev_fork_prepare (void)	712	ev_default_destroy (void)
497	{	713	{
498	/* nop */	714	#if EV_MULTIPLICITY
499	}	715	struct ev_loop *loop = default_loop;
500
501	void
502	ev_fork_parent (void)
503	{
504	/* nop */
505	}
506
507	void
508	ev_fork_child (void)
509	{
510	#if EV_USE_EPOLL
511	if (ev_method == EVMETHOD_EPOLL)
512	epoll_postfork_child ();
513	#endif	716	#endif
514		717
		718	ev_ref (EV_A); /* child watcher */
		719	ev_signal_stop (EV_A_ &childev);
		720
		721	ev_ref (EV_A); /* signal watcher */
515	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);
516	close (sigpipe [0]);	736	close (sigpipe [0]);
517	close (sigpipe [1]);	737	close (sigpipe [1]);
518	pipe (sigpipe);	738	pipe (sigpipe);
		739
		740	ev_ref (EV_A); /* signal watcher */
519	siginit ();	741	siginit (EV_A);
520	}	742	}
521		743
522	/*****************************************************************************/	744	/*****************************************************************************/
523		745
524	static void	746	static void
525	call_pending (void)	747	call_pending (EV_P)
526	{	748	{
		749	int pri;
		750
		751	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	752	while (pendingcnt [pri])
528	{	753	{
529	ANPENDING *p = pendings + --pendingcnt;	754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		755
531	if (p->w)	756	if (p->w)
532	{	757	{
533	p->w->pending = 0;	758	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	759	p->w->cb (EV_A_ p->w, p->events);
535	}	760	}
536	}	761	}
537	}	762	}
538		763
539	static void	764	static void
540	timers_reify (void)	765	timers_reify (EV_P)
541	{	766	{
542	while (timercnt && timers [0]->at <= now)	767	while (timercnt && timers [0]->at <= mn_now)
543	{	768	{
544	struct ev_timer *w = timers [0];	769	struct ev_timer *w = timers [0];
545		770
546	/* first reschedule or stop timer */	771	/* first reschedule or stop timer */
547	if (w->repeat)	772	if (w->repeat)
548	{	773	{
549	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.));
550	w->at = now + w->repeat;	775	w->at = mn_now + w->repeat;
551	downheap ((WT *)timers, timercnt, 0);	776	downheap ((WT *)timers, timercnt, 0);
552	}	777	}
553	else	778	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		780
556	event ((W)w, EV_TIMEOUT);	781	event (EV_A_ (W)w, EV_TIMEOUT);
557	}	782	}
558	}	783	}
559		784
560	static void	785	static void
561	periodics_reify (void)	786	periodics_reify (EV_P)
562	{	787	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	788	while (periodiccnt && periodics [0]->at <= rt_now)
564	{	789	{
565	struct ev_periodic *w = periodics [0];	790	struct ev_periodic *w = periodics [0];
566		791
567	/* first reschedule or stop timer */	792	/* first reschedule or stop timer */
568	if (w->interval)	793	if (w->interval)
569	{	794	{
570	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;
571	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));
572	downheap ((WT *)periodics, periodiccnt, 0);	797	downheap ((WT *)periodics, periodiccnt, 0);
573	}	798	}
574	else	799	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		801
577	event ((W)w, EV_PERIODIC);	802	event (EV_A_ (W)w, EV_PERIODIC);
578	}	803	}
579	}	804	}
580		805
581	static void	806	static void
582	periodics_reschedule (ev_tstamp diff)	807	periodics_reschedule (EV_P)
583	{	808	{
584	int i;	809	int i;
585		810
586	/* adjust periodics after time jump */	811	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	812	for (i = 0; i < periodiccnt; ++i)
588	{	813	{
589	struct ev_periodic *w = periodics [i];	814	struct ev_periodic *w = periodics [i];
590		815
591	if (w->interval)	816	if (w->interval)
592	{	817	{
593	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;
594		819
595	if (fabs (diff) >= 1e-4)	820	if (fabs (diff) >= 1e-4)
596	{	821	{
597	ev_periodic_stop (w);	822	ev_periodic_stop (EV_A_ w);
598	ev_periodic_start (w);	823	ev_periodic_start (EV_A_ w);
599		824
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	826	}
602	}	827	}
603	}	828	}
604	}	829	}
605		830
		831	inline int
		832	time_update_monotonic (EV_P)
		833	{
		834	mn_now = get_clock ();
		835
		836	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		837	{
		838	rt_now = rtmn_diff + mn_now;
		839	return 0;
		840	}
		841	else
		842	{
		843	now_floor = mn_now;
		844	rt_now = ev_time ();
		845	return 1;
		846	}
		847	}
		848
606	static void	849	static void
607	time_update (void)	850	time_update (EV_P)
608	{	851	{
609	int i;	852	int i;
610		853
611	ev_now = ev_time ();	854	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	855	if (expect_true (have_monotonic))
614	{	856	{
615	ev_tstamp odiff = diff;	857	if (time_update_monotonic (EV_A))
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	858	{
619	now = get_clock ();	859	ev_tstamp odiff = rtmn_diff;
		860
		861	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		862	{
620	diff = ev_now - now;	863	rtmn_diff = rt_now - mn_now;
621		864
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	866	return; /* all is well */
624		867
625	ev_now = ev_time ();	868	rt_now = ev_time ();
		869	mn_now = get_clock ();
		870	now_floor = mn_now;
		871	}
		872
		873	periodics_reschedule (EV_A);
		874	/* no timer adjustment, as the monotonic clock doesn't jump */
		875	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
626	}	876	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}	877	}
631	else	878	else
		879	#endif
632	{	880	{
633	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	881	rt_now = ev_time ();
		882
		883	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
634	{	884	{
635	periodics_reschedule (ev_now - now);	885	periodics_reschedule (EV_A);
636		886
637	/* 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 */
638	for (i = 0; i < timercnt; ++i)	888	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	889	timers [i]->at += rt_now - mn_now;
640	}	890	}
641		891
642	now = ev_now;	892	mn_now = rt_now;
643	}	893	}
644	}	894	}
645		895
646	int ev_loop_done;	896	void
		897	ev_ref (EV_P)
		898	{
		899	++activecnt;
		900	}
647		901
		902	void
		903	ev_unref (EV_P)
		904	{
		905	--activecnt;
		906	}
		907
		908	static int loop_done;
		909
		910	void
648	void ev_loop (int flags)	911	ev_loop (EV_P_ int flags)
649	{	912	{
650	double block;	913	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	914	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
652		915
653	do	916	do
654	{	917	{
655	/* queue check watchers (and execute them) */	918	/* queue check watchers (and execute them) */
656	if (preparecnt)	919	if (expect_false (preparecnt))
657	{	920	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	922	call_pending (EV_A);
660	}	923	}
661		924
662	/* update fd-related kernel structures */	925	/* update fd-related kernel structures */
663	fd_reify ();	926	fd_reify (EV_A);
664		927
665	/* calculate blocking time */	928	/* calculate blocking time */
666		929
667	/* 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
668	always have timers, we just calculate it always */	931	always have timers, we just calculate it always */
		932	#if EV_USE_MONOTONIC
		933	if (expect_true (have_monotonic))
		934	time_update_monotonic (EV_A);
		935	else
		936	#endif
		937	{
669	ev_now = ev_time ();	938	rt_now = ev_time ();
		939	mn_now = rt_now;
		940	}
670		941
671	if (flags & EVLOOP_NONBLOCK || idlecnt)	942	if (flags & EVLOOP_NONBLOCK || idlecnt)
672	block = 0.;	943	block = 0.;
673	else	944	else
674	{	945	{
675	block = MAX_BLOCKTIME;	946	block = MAX_BLOCKTIME;
676		947
677	if (timercnt)	948	if (timercnt)
678	{	949	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	950	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
680	if (block > to) block = to;	951	if (block > to) block = to;
681	}	952	}
682		953
683	if (periodiccnt)	954	if (periodiccnt)
684	{	955	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
686	if (block > to) block = to;	957	if (block > to) block = to;
687	}	958	}
688		959
689	if (block < 0.) block = 0.;	960	if (block < 0.) block = 0.;
690	}	961	}
691		962
692	method_poll (block);	963	method_poll (EV_A_ block);
693		964
694	/* update ev_now, do magic */	965	/* update rt_now, do magic */
695	time_update ();	966	time_update (EV_A);
696		967
697	/* queue pending timers and reschedule them */	968	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	969	timers_reify (EV_A); /* relative timers called last */
699	periodics_reify (); /* absolute timers called first */	970	periodics_reify (EV_A); /* absolute timers called first */
700		971
701	/* queue idle watchers unless io or timers are pending */	972	/* queue idle watchers unless io or timers are pending */
702	if (!pendingcnt)	973	if (!pendingcnt)
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		975
705	/* queue check watchers, to be executed first */	976	/* queue check watchers, to be executed first */
706	if (checkcnt)	977	if (checkcnt)
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		979
709	call_pending ();	980	call_pending (EV_A);
710	}	981	}
711	while (!ev_loop_done);	982	while (activecnt && !loop_done);
712		983
713	if (ev_loop_done != 2)	984	if (loop_done != 2)
714	ev_loop_done = 0;	985	loop_done = 0;
		986	}
		987
		988	void
		989	ev_unloop (EV_P_ int how)
		990	{
		991	loop_done = how;
715	}	992	}
716		993
717	/*****************************************************************************/	994	/*****************************************************************************/
718		995
719	static void	996	inline void
720	wlist_add (WL *head, WL elem)	997	wlist_add (WL *head, WL elem)
721	{	998	{
722	elem->next = *head;	999	elem->next = *head;
723	*head = elem;	1000	*head = elem;
724	}	1001	}
725		1002
726	static void	1003	inline void
727	wlist_del (WL *head, WL elem)	1004	wlist_del (WL *head, WL elem)
728	{	1005	{
729	while (*head)	1006	while (*head)
730	{	1007	{
731	if (*head == elem)	1008	if (*head == elem)
…		…
736		1013
737	head = &(*head)->next;	1014	head = &(*head)->next;
738	}	1015	}
739	}	1016	}
740		1017
741	static void	1018	inline void
742	ev_clear_pending (W w)	1019	ev_clear_pending (EV_P_ W w)
743	{	1020	{
744	if (w->pending)	1021	if (w->pending)
745	{	1022	{
746	pendings [w->pending - 1].w = 0;	1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1024	w->pending = 0;
748	}	1025	}
749	}	1026	}
750		1027
751	static void	1028	inline void
752	ev_start (W w, int active)	1029	ev_start (EV_P_ W w, int active)
753	{	1030	{
		1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1033
754	w->active = active;	1034	w->active = active;
		1035	ev_ref (EV_A);
755	}	1036	}
756		1037
757	static void	1038	inline void
758	ev_stop (W w)	1039	ev_stop (EV_P_ W w)
759	{	1040	{
		1041	ev_unref (EV_A);
760	w->active = 0;	1042	w->active = 0;
761	}	1043	}
762		1044
763	/*****************************************************************************/	1045	/*****************************************************************************/
764		1046
765	void	1047	void
766	ev_io_start (struct ev_io *w)	1048	ev_io_start (EV_P_ struct ev_io *w)
767	{	1049	{
		1050	int fd = w->fd;
		1051
768	if (ev_is_active (w))	1052	if (ev_is_active (w))
769	return;	1053	return;
770		1054
771	int fd = w->fd;
772
773	assert (("ev_io_start called with negative fd", fd >= 0));	1055	assert (("ev_io_start called with negative fd", fd >= 0));
774		1056
775	ev_start ((W)w, 1);	1057	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1060
779	fd_change (fd);	1061	fd_change (EV_A_ fd);
780	}	1062	}
781		1063
782	void	1064	void
783	ev_io_stop (struct ev_io *w)	1065	ev_io_stop (EV_P_ struct ev_io *w)
784	{	1066	{
785	ev_clear_pending ((W)w);	1067	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1068	if (!ev_is_active (w))
787	return;	1069	return;
788		1070
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1072	ev_stop (EV_A_ (W)w);
791		1073
792	fd_change (w->fd);	1074	fd_change (EV_A_ w->fd);
793	}	1075	}
794		1076
795	void	1077	void
796	ev_timer_start (struct ev_timer *w)	1078	ev_timer_start (EV_P_ struct ev_timer *w)
797	{	1079	{
798	if (ev_is_active (w))	1080	if (ev_is_active (w))
799	return;	1081	return;
800		1082
801	w->at += now;	1083	w->at += mn_now;
802		1084
803	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.));
804		1086
805	ev_start ((W)w, ++timercnt);	1087	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1088	array_needsize (timers, timermax, timercnt, );
807	timers [timercnt - 1] = w;	1089	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1090	upheap ((WT *)timers, timercnt - 1);
809	}	1091	}
810		1092
811	void	1093	void
812	ev_timer_stop (struct ev_timer *w)	1094	ev_timer_stop (EV_P_ struct ev_timer *w)
813	{	1095	{
814	ev_clear_pending ((W)w);	1096	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1097	if (!ev_is_active (w))
816	return;	1098	return;
817		1099
818	if (w->active < timercnt--)	1100	if (w->active < timercnt--)
819	{	1101	{
…		…
821	downheap ((WT *)timers, timercnt, w->active - 1);	1103	downheap ((WT *)timers, timercnt, w->active - 1);
822	}	1104	}
823		1105
824	w->at = w->repeat;	1106	w->at = w->repeat;
825		1107
826	ev_stop ((W)w);	1108	ev_stop (EV_A_ (W)w);
827	}	1109	}
828		1110
829	void	1111	void
830	ev_timer_again (struct ev_timer *w)	1112	ev_timer_again (EV_P_ struct ev_timer *w)
831	{	1113	{
832	if (ev_is_active (w))	1114	if (ev_is_active (w))
833	{	1115	{
834	if (w->repeat)	1116	if (w->repeat)
835	{	1117	{
836	w->at = now + w->repeat;	1118	w->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1119	downheap ((WT *)timers, timercnt, w->active - 1);
838	}	1120	}
839	else	1121	else
840	ev_timer_stop (w);	1122	ev_timer_stop (EV_A_ w);
841	}	1123	}
842	else if (w->repeat)	1124	else if (w->repeat)
843	ev_timer_start (w);	1125	ev_timer_start (EV_A_ w);
844	}	1126	}
845		1127
846	void	1128	void
847	ev_periodic_start (struct ev_periodic *w)	1129	ev_periodic_start (EV_P_ struct ev_periodic *w)
848	{	1130	{
849	if (ev_is_active (w))	1131	if (ev_is_active (w))
850	return;	1132	return;
851		1133
852	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.));
853		1135
854	/* 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 */
855	if (w->interval)	1137	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
857		1139
858	ev_start ((W)w, ++periodiccnt);	1140	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1141	array_needsize (periodics, periodicmax, periodiccnt, );
860	periodics [periodiccnt - 1] = w;	1142	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1143	upheap ((WT *)periodics, periodiccnt - 1);
862	}	1144	}
863		1145
864	void	1146	void
865	ev_periodic_stop (struct ev_periodic *w)	1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)
866	{	1148	{
867	ev_clear_pending ((W)w);	1149	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1150	if (!ev_is_active (w))
869	return;	1151	return;
870		1152
871	if (w->active < periodiccnt--)	1153	if (w->active < periodiccnt--)
872	{	1154	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1155	periodics [w->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);
875	}	1157	}
876		1158
877	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
878	}	1160	}
879		1161
880	void	1162	void
881	ev_signal_start (struct ev_signal *w)	1163	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1164	{
883	if (ev_is_active (w))	1165	if (ev_is_active (w))
884	return;	1166	return;
885		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
886	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));
887		1242
888	ev_start ((W)w, 1);	1243	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1244	array_needsize (signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1246
892	if (!w->next)	1247	if (!w->next)
893	{	1248	{
894	struct sigaction sa;	1249	struct sigaction sa;
895	sa.sa_handler = sighandler;	1250	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1251	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1253	sigaction (w->signum, &sa, 0);
899	}	1254	}
900	}	1255	}
901		1256
902	void	1257	void
903	ev_signal_stop (struct ev_signal *w)	1258	ev_signal_stop (EV_P_ struct ev_signal *w)
904	{	1259	{
905	ev_clear_pending ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
907	return;	1262	return;
908		1263
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1265	ev_stop (EV_A_ (W)w);
911		1266
912	if (!signals [w->signum - 1].head)	1267	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1268	signal (w->signum, SIG_DFL);
914	}	1269	}
915		1270
916	void	1271	void
917	ev_idle_start (struct ev_idle *w)	1272	ev_child_start (EV_P_ struct ev_child *w)
918	{	1273	{
		1274	#if EV_MULTIPLICITY
		1275	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1276	#endif
919	if (ev_is_active (w))	1277	if (ev_is_active (w))
920	return;	1278	return;
921		1279
922	ev_start ((W)w, ++idlecnt);	1280	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	1282	}
926		1283
927	void	1284	void
928	ev_idle_stop (struct ev_idle *w)	1285	ev_child_stop (EV_P_ struct ev_child *w)
929	{	1286	{
930	ev_clear_pending ((W)w);	1287	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1288	if (ev_is_active (w))
932	return;	1289	return;
933		1290
934	idles [w->active - 1] = idles [--idlecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_prepare_start (struct ev_prepare *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++preparecnt);
945	array_needsize (prepares, preparemax, preparecnt, );
946	prepares [preparecnt - 1] = w;
947	}
948
949	void
950	ev_prepare_stop (struct ev_prepare *w)
951	{
952	ev_clear_pending ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	prepares [w->active - 1] = prepares [--preparecnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_check_start (struct ev_check *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, ++checkcnt);
967	array_needsize (checks, checkmax, checkcnt, );
968	checks [checkcnt - 1] = w;
969	}
970
971	void
972	ev_check_stop (struct ev_check *w)
973	{
974	ev_clear_pending ((W)w);
975	if (ev_is_active (w))
976	return;
977
978	checks [w->active - 1] = checks [--checkcnt];
979	ev_stop ((W)w);
980	}
981
982	void
983	ev_child_start (struct ev_child *w)
984	{
985	if (ev_is_active (w))
986	return;
987
988	ev_start ((W)w, 1);
989	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	}
991
992	void
993	ev_child_stop (struct ev_child *w)
994	{
995	ev_clear_pending ((W)w);
996	if (ev_is_active (w))
997	return;
998
999	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1292	ev_stop (EV_A_ (W)w);
1001	}	1293	}
1002		1294
1003	/*****************************************************************************/	1295	/*****************************************************************************/
1004		1296
1005	struct ev_once	1297	struct ev_once
…		…
1009	void (*cb)(int revents, void *arg);	1301	void (*cb)(int revents, void *arg);
1010	void *arg;	1302	void *arg;
1011	};	1303	};
1012		1304
1013	static void	1305	static void
1014	once_cb (struct ev_once *once, int revents)	1306	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1307	{
1016	void (*cb)(int revents, void *arg) = once->cb;	1308	void (*cb)(int revents, void *arg) = once->cb;
1017	void *arg = once->arg;	1309	void *arg = once->arg;
1018		1310
1019	ev_io_stop (&once->io);	1311	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1312	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1313	free (once);
1022		1314
1023	cb (revents, arg);	1315	cb (revents, arg);
1024	}	1316	}
1025		1317
1026	static void	1318	static void
1027	once_cb_io (struct ev_io *w, int revents)	1319	once_cb_io (EV_P_ struct ev_io *w, int revents)
1028	{	1320	{
1029	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);
1030	}	1322	}
1031		1323
1032	static void	1324	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1034	{	1326	{
1035	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);
1036	}	1328	}
1037		1329
1038	void	1330	void
1039	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)
1040	{	1332	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1333	struct ev_once *once = malloc (sizeof (struct ev_once));
1042		1334
1043	if (!once)	1335	if (!once)
1044	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1336	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1049		1341
1050	ev_watcher_init (&once->io, once_cb_io);	1342	ev_watcher_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1343	if (fd >= 0)
1052	{	1344	{
1053	ev_io_set (&once->io, fd, events);	1345	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1346	ev_io_start (EV_A_ &once->io);
1055	}	1347	}
1056		1348
1057	ev_watcher_init (&once->to, once_cb_to);	1349	ev_watcher_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1350	if (timeout >= 0.)
1059	{	1351	{
1060	ev_timer_set (&once->to, timeout, 0.);	1352	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1353	ev_timer_start (EV_A_ &once->to);
1062	}	1354	}
1063	}	1355	}
1064	}	1356	}
1065		1357
1066	/*****************************************************************************/
1067
1068	#if 0
1069
1070	struct ev_io wio;
1071
1072	static void
1073	sin_cb (struct ev_io *w, int revents)
1074	{
1075	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1076	}
1077
1078	static void
1079	ocb (struct ev_timer *w, int revents)
1080	{
1081	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1082	ev_timer_stop (w);
1083	ev_timer_start (w);
1084	}
1085
1086	static void
1087	scb (struct ev_signal *w, int revents)
1088	{
1089	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1090	ev_io_stop (&wio);
1091	ev_io_start (&wio);
1092	}
1093
1094	static void
1095	gcb (struct ev_signal *w, int revents)
1096	{
1097	fprintf (stderr, "generic %x\n", revents);
1098
1099	}
1100
1101	int main (void)
1102	{
1103	ev_init (0);
1104
1105	ev_io_init (&wio, sin_cb, 0, EV_READ);
1106	ev_io_start (&wio);
1107
1108	struct ev_timer t[10000];
1109
1110	#if 0
1111	int i;
1112	for (i = 0; i < 10000; ++i)
1113	{
1114	struct ev_timer *w = t + i;
1115	ev_watcher_init (w, ocb, i);
1116	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1117	ev_timer_start (w);
1118	if (drand48 () < 0.5)
1119	ev_timer_stop (w);
1120	}
1121	#endif
1122
1123	struct ev_timer t1;
1124	ev_timer_init (&t1, ocb, 5, 10);
1125	ev_timer_start (&t1);
1126
1127	struct ev_signal sig;
1128	ev_signal_init (&sig, scb, SIGQUIT);
1129	ev_signal_start (&sig);
1130
1131	struct ev_check cw;
1132	ev_check_init (&cw, gcb);
1133	ev_check_start (&cw);
1134
1135	struct ev_idle iw;
1136	ev_idle_init (&iw, gcb);
1137	ev_idle_start (&iw);
1138
1139	ev_loop (0);
1140
1141	return 0;
1142	}
1143
1144	#endif
1145
1146
1147
1148

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