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Comparing libev/ev.c (file contents):
Revision 1.37 by root, Thu Nov 1 13:33:12 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	# 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
		98	#ifndef EV_EMBED
80	#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)
81		115
82	typedef struct ev_watcher *W;	116	typedef struct ev_watcher *W;
83	typedef struct ev_watcher_list *WL;	117	typedef struct ev_watcher_list *WL;
84	typedef struct ev_watcher_time *WT;	118	typedef struct ev_watcher_time *WT;
85		119
86	static ev_tstamp now, diff; /* monotonic clock */	120	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		121
96	/*****************************************************************************/	122	/*****************************************************************************/
97		123
98	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
99	ev_time (void)	158	ev_time (void)
100	{	159	{
101	#if EV_USE_REALTIME	160	#if EV_USE_REALTIME
102	struct timespec ts;	161	struct timespec ts;
103	clock_gettime (CLOCK_REALTIME, &ts);	162	clock_gettime (CLOCK_REALTIME, &ts);
…		…
107	gettimeofday (&tv, 0);	166	gettimeofday (&tv, 0);
108	return tv.tv_sec + tv.tv_usec * 1e-6;	167	return tv.tv_sec + tv.tv_usec * 1e-6;
109	#endif	168	#endif
110	}	169	}
111		170
112	static ev_tstamp	171	inline ev_tstamp
113	get_clock (void)	172	get_clock (void)
114	{	173	{
115	#if EV_USE_MONOTONIC	174	#if EV_USE_MONOTONIC
116	if (have_monotonic)	175	if (expect_true (have_monotonic))
117	{	176	{
118	struct timespec ts;	177	struct timespec ts;
119	clock_gettime (CLOCK_MONOTONIC, &ts);	178	clock_gettime (CLOCK_MONOTONIC, &ts);
120	return ts.tv_sec + ts.tv_nsec * 1e-9;	179	return ts.tv_sec + ts.tv_nsec * 1e-9;
121	}	180	}
122	#endif	181	#endif
123		182
124	return ev_time ();	183	return ev_time ();
125	}	184	}
126		185
		186	ev_tstamp
		187	ev_now (EV_P)
		188	{
		189	return rt_now;
		190	}
		191
127	#define array_roundsize(base,n) ((n) | 4 & ~3)	192	#define array_roundsize(base,n) ((n) | 4 & ~3)
128		193
129	#define array_needsize(base,cur,cnt,init) \	194	#define array_needsize(base,cur,cnt,init) \
130	if ((cnt) > cur) \	195	if (expect_false ((cnt) > cur)) \
131	{ \	196	{ \
132	int newcnt = cur; \	197	int newcnt = cur; \
133	do \	198	do \
134	{ \	199	{ \
135	newcnt = array_roundsize (base, newcnt << 1); \	200	newcnt = array_roundsize (base, newcnt << 1); \
…		…
141	cur = newcnt; \	206	cur = newcnt; \
142	}	207	}
143		208
144	/*****************************************************************************/	209	/*****************************************************************************/
145		210
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	211	static void
157	anfds_init (ANFD *base, int count)	212	anfds_init (ANFD *base, int count)
158	{	213	{
159	while (count--)	214	while (count--)
160	{	215	{
…		…
164		219
165	++base;	220	++base;
166	}	221	}
167	}	222	}
168		223
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	224	static void
179	event (W w, int events)	225	event (EV_P_ W w, int events)
180	{	226	{
181	if (w->pending)	227	if (w->pending)
182	{	228	{
183	pendings [w->pending - 1].events |= events;	229	pendings [ABSPRI (w)][w->pending - 1].events |= events;
184	return;	230	return;
185	}	231	}
186		232
187	w->pending = ++pendingcnt;	233	w->pending = ++pendingcnt [ABSPRI (w)];
188	array_needsize (pendings, pendingmax, pendingcnt, );	234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
189	pendings [pendingcnt - 1].w = w;	235	pendings [ABSPRI (w)][w->pending - 1].w = w;
190	pendings [pendingcnt - 1].events = events;	236	pendings [ABSPRI (w)][w->pending - 1].events = events;
191	}	237	}
192		238
193	static void	239	static void
194	queue_events (W *events, int eventcnt, int type)	240	queue_events (EV_P_ W *events, int eventcnt, int type)
195	{	241	{
196	int i;	242	int i;
197		243
198	for (i = 0; i < eventcnt; ++i)	244	for (i = 0; i < eventcnt; ++i)
199	event (events [i], type);	245	event (EV_A_ events [i], type);
200	}	246	}
201		247
202	static void	248	static void
203	fd_event (int fd, int events)	249	fd_event (EV_P_ int fd, int events)
204	{	250	{
205	ANFD *anfd = anfds + fd;	251	ANFD *anfd = anfds + fd;
206	struct ev_io *w;	252	struct ev_io *w;
207		253
208	for (w = anfd->head; w; w = w->next)	254	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
209	{	255	{
210	int ev = w->events & events;	256	int ev = w->events & events;
211		257
212	if (ev)	258	if (ev)
213	event ((W)w, ev);	259	event (EV_A_ (W)w, ev);
214	}	260	}
215	}	261	}
216		262
217	/*****************************************************************************/	263	/*****************************************************************************/
218		264
219	static int *fdchanges;
220	static int fdchangemax, fdchangecnt;
221
222	static void	265	static void
223	fd_reify (void)	266	fd_reify (EV_P)
224	{	267	{
225	int i;	268	int i;
226		269
227	for (i = 0; i < fdchangecnt; ++i)	270	for (i = 0; i < fdchangecnt; ++i)
228	{	271	{
…		…
230	ANFD *anfd = anfds + fd;	273	ANFD *anfd = anfds + fd;
231	struct ev_io *w;	274	struct ev_io *w;
232		275
233	int events = 0;	276	int events = 0;
234		277
235	for (w = anfd->head; w; w = w->next)	278	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
236	events |= w->events;	279	events |= w->events;
237		280
238	anfd->reify = 0;	281	anfd->reify = 0;
239		282
240	if (anfd->events != events)	283	if (anfd->events != events)
241	{	284	{
242	method_modify (fd, anfd->events, events);	285	method_modify (EV_A_ fd, anfd->events, events);
243	anfd->events = events;	286	anfd->events = events;
244	}	287	}
245	}	288	}
246		289
247	fdchangecnt = 0;	290	fdchangecnt = 0;
248	}	291	}
249		292
250	static void	293	static void
251	fd_change (int fd)	294	fd_change (EV_P_ int fd)
252	{	295	{
253	if (anfds [fd].reify || fdchangecnt < 0)	296	if (anfds [fd].reify || fdchangecnt < 0)
254	return;	297	return;
255		298
256	anfds [fd].reify = 1;	299	anfds [fd].reify = 1;
…		…
258	++fdchangecnt;	301	++fdchangecnt;
259	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
260	fdchanges [fdchangecnt - 1] = fd;	303	fdchanges [fdchangecnt - 1] = fd;
261	}	304	}
262		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
263	/* called on EBADF to verify fds */	318	/* called on EBADF to verify fds */
264	static void	319	static void
265	fd_recheck (void)	320	fd_ebadf (EV_P)
266	{	321	{
267	int fd;	322	int fd;
268		323
269	for (fd = 0; fd < anfdmax; ++fd)	324	for (fd = 0; fd < anfdmax; ++fd)
270	if (anfds [fd].events)	325	if (anfds [fd].events)
271	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
272	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)
273	{	338	{
274	ev_io_stop (anfds [fd].head);	339	close (fd);
275	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	340	fd_kill (EV_A_ fd);
		341	return;
276	}	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	}
277	}	358	}
278		359
279	/*****************************************************************************/	360	/*****************************************************************************/
280		361
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	362	static void
288	upheap (WT *timers, int k)	363	upheap (WT *heap, int k)
289	{	364	{
290	WT w = timers [k];	365	WT w = heap [k];
291		366
292	while (k && timers [k >> 1]->at > w->at)	367	while (k && heap [k >> 1]->at > w->at)
293	{	368	{
294	timers [k] = timers [k >> 1];	369	heap [k] = heap [k >> 1];
295	timers [k]->active = k + 1;	370	heap [k]->active = k + 1;
296	k >>= 1;	371	k >>= 1;
297	}	372	}
298		373
299	timers [k] = w;	374	heap [k] = w;
300	timers [k]->active = k + 1;	375	heap [k]->active = k + 1;
301		376
302	}	377	}
303		378
304	static void	379	static void
305	downheap (WT *timers, int N, int k)	380	downheap (WT *heap, int N, int k)
306	{	381	{
307	WT w = timers [k];	382	WT w = heap [k];
308		383
309	while (k < (N >> 1))	384	while (k < (N >> 1))
310	{	385	{
311	int j = k << 1;	386	int j = k << 1;
312		387
313	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
314	++j;	389	++j;
315		390
316	if (w->at <= timers [j]->at)	391	if (w->at <= heap [j]->at)
317	break;	392	break;
318		393
319	timers [k] = timers [j];	394	heap [k] = heap [j];
320	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
321	k = j;	396	k = j;
322	}	397	}
323		398
324	timers [k] = w;	399	heap [k] = w;
325	timers [k]->active = k + 1;	400	heap [k]->active = k + 1;
326	}	401	}
327		402
328	/*****************************************************************************/	403	/*****************************************************************************/
329		404
330	typedef struct	405	typedef struct
331	{	406	{
332	struct ev_signal *head;	407	struct ev_watcher_list *head;
333	sig_atomic_t volatile gotsig;	408	sig_atomic_t volatile gotsig;
334	} ANSIG;	409	} ANSIG;
335		410
336	static ANSIG *signals;	411	static ANSIG *signals;
337	static int signalmax;	412	static int signalmax;
338		413
339	static int sigpipe [2];	414	static int sigpipe [2];
340	static sig_atomic_t volatile gotsig;	415	static sig_atomic_t volatile gotsig;
341	static struct ev_io sigev;
342		416
343	static void	417	static void
344	signals_init (ANSIG *base, int count)	418	signals_init (ANSIG *base, int count)
345	{	419	{
346	while (count--)	420	while (count--)
…		…
357	{	431	{
358	signals [signum - 1].gotsig = 1;	432	signals [signum - 1].gotsig = 1;
359		433
360	if (!gotsig)	434	if (!gotsig)
361	{	435	{
		436	int old_errno = errno;
362	gotsig = 1;	437	gotsig = 1;
363	write (sigpipe [1], &signum, 1);	438	write (sigpipe [1], &signum, 1);
		439	errno = old_errno;
364	}	440	}
365	}	441	}
366		442
367	static void	443	static void
368	sigcb (struct ev_io *iow, int revents)	444	sigcb (EV_P_ struct ev_io *iow, int revents)
369	{	445	{
370	struct ev_signal *w;	446	struct ev_watcher_list *w;
371	int sig;	447	int signum;
372		448
373	read (sigpipe [0], &revents, 1);	449	read (sigpipe [0], &revents, 1);
374	gotsig = 0;	450	gotsig = 0;
375		451
376	for (sig = signalmax; sig--; )	452	for (signum = signalmax; signum--; )
377	if (signals [sig].gotsig)	453	if (signals [signum].gotsig)
378	{	454	{
379	signals [sig].gotsig = 0;	455	signals [signum].gotsig = 0;
380		456
381	for (w = signals [sig].head; w; w = w->next)	457	for (w = signals [signum].head; w; w = w->next)
382	event ((W)w, EV_SIGNAL);	458	event (EV_A_ (W)w, EV_SIGNAL);
383	}	459	}
384	}	460	}
385		461
386	static void	462	static void
387	siginit (void)	463	siginit (EV_P)
388	{	464	{
		465	#ifndef WIN32
389	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391		468
392	/* rather than sort out wether we really need nb, set it */	469	/* rather than sort out wether we really need nb, set it */
393	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		472	#endif
395		473
396	ev_io_set (&sigev, sigpipe [0], EV_READ);	474	ev_io_set (&sigev, sigpipe [0], EV_READ);
397	ev_io_start (&sigev);	475	ev_io_start (EV_A_ &sigev);
		476	ev_unref (EV_A); /* child watcher should not keep loop alive */
398	}	477	}
399		478
400	/*****************************************************************************/	479	/*****************************************************************************/
401		480
402	static struct ev_idle **idles;	481	#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		482
416	#ifndef WCONTINUED	483	#ifndef WCONTINUED
417	# define WCONTINUED 0	484	# define WCONTINUED 0
418	#endif	485	#endif
419		486
420	static void	487	static void
421	childcb (struct ev_signal *sw, int revents)	488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
422	{	489	{
423	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	{
424	int pid, status;	505	int pid, status;
425		506
426	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	507	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
427	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	508	{
428	if (w->pid == pid || w->pid == -1)	509	/* make sure we are called again until all childs have been reaped */
429	{	510	event (EV_A_ (W)sw, EV_SIGNAL);
430	w->status = status;	511
431	event ((W)w, EV_CHILD);	512	child_reap (EV_A_ sw, pid, pid, status);
432	}	513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		514	}
433	}	515	}
		516
		517	#endif
434		518
435	/*****************************************************************************/	519	/*****************************************************************************/
436		520
		521	#if EV_USE_KQUEUE
		522	# include "ev_kqueue.c"
		523	#endif
437	#if EV_USE_EPOLL	524	#if EV_USE_EPOLL
438	# include "ev_epoll.c"	525	# include "ev_epoll.c"
439	#endif	526	#endif
		527	#if EV_USEV_POLL
		528	# include "ev_poll.c"
		529	#endif
440	#if EV_USE_SELECT	530	#if EV_USE_SELECT
441	# include "ev_select.c"	531	# include "ev_select.c"
442	#endif	532	#endif
443		533
444	int	534	int
…		…
451	ev_version_minor (void)	541	ev_version_minor (void)
452	{	542	{
453	return EV_VERSION_MINOR;	543	return EV_VERSION_MINOR;
454	}	544	}
455		545
456	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)
457	{	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	{
458	if (!ev_method)	567	if (!method)
459	{	568	{
460	#if EV_USE_MONOTONIC	569	#if EV_USE_MONOTONIC
461	{	570	{
462	struct timespec ts;	571	struct timespec ts;
463	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
464	have_monotonic = 1;	573	have_monotonic = 1;
465	}	574	}
466	#endif	575	#endif
467		576
468	ev_now = ev_time ();	577	rt_now = ev_time ();
469	now = get_clock ();	578	mn_now = get_clock ();
		579	now_floor = mn_now;
470	diff = ev_now - now;	580	rtmn_diff = rt_now - mn_now;
471		581
472	if (pipe (sigpipe))	582	if (methods == EVMETHOD_AUTO)
473	return 0;	583	if (!enable_secure () && getenv ("LIBEV_METHODS"))
474		584	methods = atoi (getenv ("LIBEV_METHODS"));
		585	else
475	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
476	#if EV_USE_EPOLL	592	#if EV_USE_EPOLL
477	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);
478	#endif	597	#endif
479	#if EV_USE_SELECT	598	#if EV_USE_SELECT
480	if (ev_method == EVMETHOD_NONE) select_init (flags);	599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
481	#endif	600	#endif
		601	}
		602	}
482		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
483	if (ev_method)	691	if (ev_method (EV_A))
484	{	692	{
485	ev_watcher_init (&sigev, sigcb);	693	ev_watcher_init (&sigev, sigcb);
		694	ev_set_priority (&sigev, EV_MAXPRI);
486	siginit ();	695	siginit (EV_A);
487		696
		697	#ifndef WIN32
488	ev_signal_init (&childev, childcb, SIGCHLD);	698	ev_signal_init (&childev, childcb, SIGCHLD);
		699	ev_set_priority (&childev, EV_MAXPRI);
489	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
490	}	703	}
		704	else
		705	default_loop = 0;
491	}	706	}
492		707
493	return ev_method;	708	return default_loop;
494	}	709	}
495		710
496	/*****************************************************************************/
497
498	void	711	void
499	ev_fork_prepare (void)	712	ev_default_destroy (void)
500	{	713	{
501	/* nop */	714	#if EV_MULTIPLICITY
502	}	715	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	716	#endif
517		717
		718	ev_ref (EV_A); /* child watcher */
		719	ev_signal_stop (EV_A_ &childev);
		720
		721	ev_ref (EV_A); /* signal watcher */
518	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);
519	close (sigpipe [0]);	736	close (sigpipe [0]);
520	close (sigpipe [1]);	737	close (sigpipe [1]);
521	pipe (sigpipe);	738	pipe (sigpipe);
		739
		740	ev_ref (EV_A); /* signal watcher */
522	siginit ();	741	siginit (EV_A);
523	}	742	}
524		743
525	/*****************************************************************************/	744	/*****************************************************************************/
526		745
527	static void	746	static void
528	call_pending (void)	747	call_pending (EV_P)
529	{	748	{
		749	int pri;
		750
		751	for (pri = NUMPRI; pri--; )
530	while (pendingcnt)	752	while (pendingcnt [pri])
531	{	753	{
532	ANPENDING *p = pendings + --pendingcnt;	754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
533		755
534	if (p->w)	756	if (p->w)
535	{	757	{
536	p->w->pending = 0;	758	p->w->pending = 0;
537	p->w->cb (p->w, p->events);	759	p->w->cb (EV_A_ p->w, p->events);
538	}	760	}
539	}	761	}
540	}	762	}
541		763
542	static void	764	static void
543	timers_reify (void)	765	timers_reify (EV_P)
544	{	766	{
545	while (timercnt && timers [0]->at <= now)	767	while (timercnt && timers [0]->at <= mn_now)
546	{	768	{
547	struct ev_timer *w = timers [0];	769	struct ev_timer *w = timers [0];
548		770
549	/* first reschedule or stop timer */	771	/* first reschedule or stop timer */
550	if (w->repeat)	772	if (w->repeat)
551	{	773	{
552	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.));
553	w->at = now + w->repeat;	775	w->at = mn_now + w->repeat;
554	downheap ((WT *)timers, timercnt, 0);	776	downheap ((WT *)timers, timercnt, 0);
555	}	777	}
556	else	778	else
557	ev_timer_stop (w); /* nonrepeating: stop timer */	779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
558		780
559	event ((W)w, EV_TIMEOUT);	781	event (EV_A_ (W)w, EV_TIMEOUT);
560	}	782	}
561	}	783	}
562		784
563	static void	785	static void
564	periodics_reify (void)	786	periodics_reify (EV_P)
565	{	787	{
566	while (periodiccnt && periodics [0]->at <= ev_now)	788	while (periodiccnt && periodics [0]->at <= rt_now)
567	{	789	{
568	struct ev_periodic *w = periodics [0];	790	struct ev_periodic *w = periodics [0];
569		791
570	/* first reschedule or stop timer */	792	/* first reschedule or stop timer */
571	if (w->interval)	793	if (w->interval)
572	{	794	{
573	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;
574	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));
575	downheap ((WT *)periodics, periodiccnt, 0);	797	downheap ((WT *)periodics, periodiccnt, 0);
576	}	798	}
577	else	799	else
578	ev_periodic_stop (w); /* nonrepeating: stop timer */	800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
579		801
580	event ((W)w, EV_PERIODIC);	802	event (EV_A_ (W)w, EV_PERIODIC);
581	}	803	}
582	}	804	}
583		805
584	static void	806	static void
585	periodics_reschedule (ev_tstamp diff)	807	periodics_reschedule (EV_P)
586	{	808	{
587	int i;	809	int i;
588		810
589	/* adjust periodics after time jump */	811	/* adjust periodics after time jump */
590	for (i = 0; i < periodiccnt; ++i)	812	for (i = 0; i < periodiccnt; ++i)
591	{	813	{
592	struct ev_periodic *w = periodics [i];	814	struct ev_periodic *w = periodics [i];
593		815
594	if (w->interval)	816	if (w->interval)
595	{	817	{
596	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;
597		819
598	if (fabs (diff) >= 1e-4)	820	if (fabs (diff) >= 1e-4)
599	{	821	{
600	ev_periodic_stop (w);	822	ev_periodic_stop (EV_A_ w);
601	ev_periodic_start (w);	823	ev_periodic_start (EV_A_ w);
602		824
603	i = 0; /* restart loop, inefficient, but time jumps should be rare */	825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
604	}	826	}
605	}	827	}
606	}	828	}
607	}	829	}
608		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
609	static void	849	static void
610	time_update (void)	850	time_update (EV_P)
611	{	851	{
612	int i;	852	int i;
613		853
614	ev_now = ev_time ();	854	#if EV_USE_MONOTONIC
615
616	if (have_monotonic)	855	if (expect_true (have_monotonic))
617	{	856	{
618	ev_tstamp odiff = diff;	857	if (time_update_monotonic (EV_A))
619
620	for (i = 4; --i; ) /* loop a few times, before making important decisions */
621	{	858	{
622	now = get_clock ();	859	ev_tstamp odiff = rtmn_diff;
		860
		861	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		862	{
623	diff = ev_now - now;	863	rtmn_diff = rt_now - mn_now;
624		864
625	if (fabs (odiff - diff) < MIN_TIMEJUMP)	865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
626	return; /* all is well */	866	return; /* all is well */
627		867
628	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) */
629	}	876	}
630
631	periodics_reschedule (diff - odiff);
632	/* no timer adjustment, as the monotonic clock doesn't jump */
633	}	877	}
634	else	878	else
		879	#endif
635	{	880	{
636	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))
637	{	884	{
638	periodics_reschedule (ev_now - now);	885	periodics_reschedule (EV_A);
639		886
640	/* 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 */
641	for (i = 0; i < timercnt; ++i)	888	for (i = 0; i < timercnt; ++i)
642	timers [i]->at += diff;	889	timers [i]->at += rt_now - mn_now;
643	}	890	}
644		891
645	now = ev_now;	892	mn_now = rt_now;
646	}	893	}
647	}	894	}
648		895
649	int ev_loop_done;	896	void
		897	ev_ref (EV_P)
		898	{
		899	++activecnt;
		900	}
650		901
		902	void
		903	ev_unref (EV_P)
		904	{
		905	--activecnt;
		906	}
		907
		908	static int loop_done;
		909
		910	void
651	void ev_loop (int flags)	911	ev_loop (EV_P_ int flags)
652	{	912	{
653	double block;	913	double block;
654	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	914	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
655		915
656	do	916	do
657	{	917	{
658	/* queue check watchers (and execute them) */	918	/* queue check watchers (and execute them) */
659	if (preparecnt)	919	if (expect_false (preparecnt))
660	{	920	{
661	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662	call_pending ();	922	call_pending (EV_A);
663	}	923	}
664		924
665	/* update fd-related kernel structures */	925	/* update fd-related kernel structures */
666	fd_reify ();	926	fd_reify (EV_A);
667		927
668	/* calculate blocking time */	928	/* calculate blocking time */
669		929
670	/* 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
671	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	{
672	ev_now = ev_time ();	938	rt_now = ev_time ();
		939	mn_now = rt_now;
		940	}
673		941
674	if (flags & EVLOOP_NONBLOCK || idlecnt)	942	if (flags & EVLOOP_NONBLOCK || idlecnt)
675	block = 0.;	943	block = 0.;
676	else	944	else
677	{	945	{
678	block = MAX_BLOCKTIME;	946	block = MAX_BLOCKTIME;
679		947
680	if (timercnt)	948	if (timercnt)
681	{	949	{
682	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;
683	if (block > to) block = to;	951	if (block > to) block = to;
684	}	952	}
685		953
686	if (periodiccnt)	954	if (periodiccnt)
687	{	955	{
688	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
689	if (block > to) block = to;	957	if (block > to) block = to;
690	}	958	}
691		959
692	if (block < 0.) block = 0.;	960	if (block < 0.) block = 0.;
693	}	961	}
694		962
695	method_poll (block);	963	method_poll (EV_A_ block);
696		964
697	/* update ev_now, do magic */	965	/* update rt_now, do magic */
698	time_update ();	966	time_update (EV_A);
699		967
700	/* queue pending timers and reschedule them */	968	/* queue pending timers and reschedule them */
701	timers_reify (); /* relative timers called last */	969	timers_reify (EV_A); /* relative timers called last */
702	periodics_reify (); /* absolute timers called first */	970	periodics_reify (EV_A); /* absolute timers called first */
703		971
704	/* queue idle watchers unless io or timers are pending */	972	/* queue idle watchers unless io or timers are pending */
705	if (!pendingcnt)	973	if (!pendingcnt)
706	queue_events ((W *)idles, idlecnt, EV_IDLE);	974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
707		975
708	/* queue check watchers, to be executed first */	976	/* queue check watchers, to be executed first */
709	if (checkcnt)	977	if (checkcnt)
710	queue_events ((W *)checks, checkcnt, EV_CHECK);	978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711		979
712	call_pending ();	980	call_pending (EV_A);
713	}	981	}
714	while (!ev_loop_done);	982	while (activecnt && !loop_done);
715		983
716	if (ev_loop_done != 2)	984	if (loop_done != 2)
717	ev_loop_done = 0;	985	loop_done = 0;
		986	}
		987
		988	void
		989	ev_unloop (EV_P_ int how)
		990	{
		991	loop_done = how;
718	}	992	}
719		993
720	/*****************************************************************************/	994	/*****************************************************************************/
721		995
722	static void	996	inline void
723	wlist_add (WL *head, WL elem)	997	wlist_add (WL *head, WL elem)
724	{	998	{
725	elem->next = *head;	999	elem->next = *head;
726	*head = elem;	1000	*head = elem;
727	}	1001	}
728		1002
729	static void	1003	inline void
730	wlist_del (WL *head, WL elem)	1004	wlist_del (WL *head, WL elem)
731	{	1005	{
732	while (*head)	1006	while (*head)
733	{	1007	{
734	if (*head == elem)	1008	if (*head == elem)
…		…
739		1013
740	head = &(*head)->next;	1014	head = &(*head)->next;
741	}	1015	}
742	}	1016	}
743		1017
744	static void	1018	inline void
745	ev_clear_pending (W w)	1019	ev_clear_pending (EV_P_ W w)
746	{	1020	{
747	if (w->pending)	1021	if (w->pending)
748	{	1022	{
749	pendings [w->pending - 1].w = 0;	1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;
750	w->pending = 0;	1024	w->pending = 0;
751	}	1025	}
752	}	1026	}
753		1027
754	static void	1028	inline void
755	ev_start (W w, int active)	1029	ev_start (EV_P_ W w, int active)
756	{	1030	{
		1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1033
757	w->active = active;	1034	w->active = active;
		1035	ev_ref (EV_A);
758	}	1036	}
759		1037
760	static void	1038	inline void
761	ev_stop (W w)	1039	ev_stop (EV_P_ W w)
762	{	1040	{
		1041	ev_unref (EV_A);
763	w->active = 0;	1042	w->active = 0;
764	}	1043	}
765		1044
766	/*****************************************************************************/	1045	/*****************************************************************************/
767		1046
768	void	1047	void
769	ev_io_start (struct ev_io *w)	1048	ev_io_start (EV_P_ struct ev_io *w)
770	{	1049	{
771	int fd = w->fd;	1050	int fd = w->fd;
772		1051
773	if (ev_is_active (w))	1052	if (ev_is_active (w))
774	return;	1053	return;
775		1054
776	assert (("ev_io_start called with negative fd", fd >= 0));	1055	assert (("ev_io_start called with negative fd", fd >= 0));
777		1056
778	ev_start ((W)w, 1);	1057	ev_start (EV_A_ (W)w, 1);
779	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
780	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);
781		1060
782	fd_change (fd);	1061	fd_change (EV_A_ fd);
783	}	1062	}
784		1063
785	void	1064	void
786	ev_io_stop (struct ev_io *w)	1065	ev_io_stop (EV_P_ struct ev_io *w)
787	{	1066	{
788	ev_clear_pending ((W)w);	1067	ev_clear_pending (EV_A_ (W)w);
789	if (!ev_is_active (w))	1068	if (!ev_is_active (w))
790	return;	1069	return;
791		1070
792	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
793	ev_stop ((W)w);	1072	ev_stop (EV_A_ (W)w);
794		1073
795	fd_change (w->fd);	1074	fd_change (EV_A_ w->fd);
796	}	1075	}
797		1076
798	void	1077	void
799	ev_timer_start (struct ev_timer *w)	1078	ev_timer_start (EV_P_ struct ev_timer *w)
800	{	1079	{
801	if (ev_is_active (w))	1080	if (ev_is_active (w))
802	return;	1081	return;
803		1082
804	w->at += now;	1083	w->at += mn_now;
805		1084
806	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.));
807		1086
808	ev_start ((W)w, ++timercnt);	1087	ev_start (EV_A_ (W)w, ++timercnt);
809	array_needsize (timers, timermax, timercnt, );	1088	array_needsize (timers, timermax, timercnt, );
810	timers [timercnt - 1] = w;	1089	timers [timercnt - 1] = w;
811	upheap ((WT *)timers, timercnt - 1);	1090	upheap ((WT *)timers, timercnt - 1);
812	}	1091	}
813		1092
814	void	1093	void
815	ev_timer_stop (struct ev_timer *w)	1094	ev_timer_stop (EV_P_ struct ev_timer *w)
816	{	1095	{
817	ev_clear_pending ((W)w);	1096	ev_clear_pending (EV_A_ (W)w);
818	if (!ev_is_active (w))	1097	if (!ev_is_active (w))
819	return;	1098	return;
820		1099
821	if (w->active < timercnt--)	1100	if (w->active < timercnt--)
822	{	1101	{
…		…
824	downheap ((WT *)timers, timercnt, w->active - 1);	1103	downheap ((WT *)timers, timercnt, w->active - 1);
825	}	1104	}
826		1105
827	w->at = w->repeat;	1106	w->at = w->repeat;
828		1107
829	ev_stop ((W)w);	1108	ev_stop (EV_A_ (W)w);
830	}	1109	}
831		1110
832	void	1111	void
833	ev_timer_again (struct ev_timer *w)	1112	ev_timer_again (EV_P_ struct ev_timer *w)
834	{	1113	{
835	if (ev_is_active (w))	1114	if (ev_is_active (w))
836	{	1115	{
837	if (w->repeat)	1116	if (w->repeat)
838	{	1117	{
839	w->at = now + w->repeat;	1118	w->at = mn_now + w->repeat;
840	downheap ((WT *)timers, timercnt, w->active - 1);	1119	downheap ((WT *)timers, timercnt, w->active - 1);
841	}	1120	}
842	else	1121	else
843	ev_timer_stop (w);	1122	ev_timer_stop (EV_A_ w);
844	}	1123	}
845	else if (w->repeat)	1124	else if (w->repeat)
846	ev_timer_start (w);	1125	ev_timer_start (EV_A_ w);
847	}	1126	}
848		1127
849	void	1128	void
850	ev_periodic_start (struct ev_periodic *w)	1129	ev_periodic_start (EV_P_ struct ev_periodic *w)
851	{	1130	{
852	if (ev_is_active (w))	1131	if (ev_is_active (w))
853	return;	1132	return;
854		1133
855	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.));
856		1135
857	/* 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 */
858	if (w->interval)	1137	if (w->interval)
859	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
860		1139
861	ev_start ((W)w, ++periodiccnt);	1140	ev_start (EV_A_ (W)w, ++periodiccnt);
862	array_needsize (periodics, periodicmax, periodiccnt, );	1141	array_needsize (periodics, periodicmax, periodiccnt, );
863	periodics [periodiccnt - 1] = w;	1142	periodics [periodiccnt - 1] = w;
864	upheap ((WT *)periodics, periodiccnt - 1);	1143	upheap ((WT *)periodics, periodiccnt - 1);
865	}	1144	}
866		1145
867	void	1146	void
868	ev_periodic_stop (struct ev_periodic *w)	1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)
869	{	1148	{
870	ev_clear_pending ((W)w);	1149	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1150	if (!ev_is_active (w))
872	return;	1151	return;
873		1152
874	if (w->active < periodiccnt--)	1153	if (w->active < periodiccnt--)
875	{	1154	{
876	periodics [w->active - 1] = periodics [periodiccnt];	1155	periodics [w->active - 1] = periodics [periodiccnt];
877	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);
878	}	1157	}
879		1158
880	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
881	}	1160	}
882		1161
883	void	1162	void
884	ev_signal_start (struct ev_signal *w)	1163	ev_idle_start (EV_P_ struct ev_idle *w)
885	{	1164	{
886	if (ev_is_active (w))	1165	if (ev_is_active (w))
887	return;	1166	return;
888		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
889	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));
890		1242
891	ev_start ((W)w, 1);	1243	ev_start (EV_A_ (W)w, 1);
892	array_needsize (signals, signalmax, w->signum, signals_init);	1244	array_needsize (signals, signalmax, w->signum, signals_init);
893	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
894		1246
895	if (!w->next)	1247	if (!w->next)
896	{	1248	{
897	struct sigaction sa;	1249	struct sigaction sa;
898	sa.sa_handler = sighandler;	1250	sa.sa_handler = sighandler;
899	sigfillset (&sa.sa_mask);	1251	sigfillset (&sa.sa_mask);
900	sa.sa_flags = 0;	1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901	sigaction (w->signum, &sa, 0);	1253	sigaction (w->signum, &sa, 0);
902	}	1254	}
903	}	1255	}
904		1256
905	void	1257	void
906	ev_signal_stop (struct ev_signal *w)	1258	ev_signal_stop (EV_P_ struct ev_signal *w)
907	{	1259	{
908	ev_clear_pending ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
909	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
910	return;	1262	return;
911		1263
912	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
913	ev_stop ((W)w);	1265	ev_stop (EV_A_ (W)w);
914		1266
915	if (!signals [w->signum - 1].head)	1267	if (!signals [w->signum - 1].head)
916	signal (w->signum, SIG_DFL);	1268	signal (w->signum, SIG_DFL);
917	}	1269	}
918		1270
919	void	1271	void
920	ev_idle_start (struct ev_idle *w)	1272	ev_child_start (EV_P_ struct ev_child *w)
921	{	1273	{
		1274	#if EV_MULTIPLICITY
		1275	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1276	#endif
922	if (ev_is_active (w))	1277	if (ev_is_active (w))
923	return;	1278	return;
924		1279
925	ev_start ((W)w, ++idlecnt);	1280	ev_start (EV_A_ (W)w, 1);
926	array_needsize (idles, idlemax, idlecnt, );	1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
927	idles [idlecnt - 1] = w;
928	}	1282	}
929		1283
930	void	1284	void
931	ev_idle_stop (struct ev_idle *w)	1285	ev_child_stop (EV_P_ struct ev_child *w)
932	{	1286	{
933	ev_clear_pending ((W)w);	1287	ev_clear_pending (EV_A_ (W)w);
934	if (ev_is_active (w))	1288	if (ev_is_active (w))
935	return;	1289	return;
936		1290
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);	1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1003	ev_stop ((W)w);	1292	ev_stop (EV_A_ (W)w);
1004	}	1293	}
1005		1294
1006	/*****************************************************************************/	1295	/*****************************************************************************/
1007		1296
1008	struct ev_once	1297	struct ev_once
…		…
1012	void (*cb)(int revents, void *arg);	1301	void (*cb)(int revents, void *arg);
1013	void *arg;	1302	void *arg;
1014	};	1303	};
1015		1304
1016	static void	1305	static void
1017	once_cb (struct ev_once *once, int revents)	1306	once_cb (EV_P_ struct ev_once *once, int revents)
1018	{	1307	{
1019	void (*cb)(int revents, void *arg) = once->cb;	1308	void (*cb)(int revents, void *arg) = once->cb;
1020	void *arg = once->arg;	1309	void *arg = once->arg;
1021		1310
1022	ev_io_stop (&once->io);	1311	ev_io_stop (EV_A_ &once->io);
1023	ev_timer_stop (&once->to);	1312	ev_timer_stop (EV_A_ &once->to);
1024	free (once);	1313	free (once);
1025		1314
1026	cb (revents, arg);	1315	cb (revents, arg);
1027	}	1316	}
1028		1317
1029	static void	1318	static void
1030	once_cb_io (struct ev_io *w, int revents)	1319	once_cb_io (EV_P_ struct ev_io *w, int revents)
1031	{	1320	{
1032	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);
1033	}	1322	}
1034		1323
1035	static void	1324	static void
1036	once_cb_to (struct ev_timer *w, int revents)	1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1037	{	1326	{
1038	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);
1039	}	1328	}
1040		1329
1041	void	1330	void
1042	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)
1043	{	1332	{
1044	struct ev_once *once = malloc (sizeof (struct ev_once));	1333	struct ev_once *once = malloc (sizeof (struct ev_once));
1045		1334
1046	if (!once)	1335	if (!once)
1047	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1336	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1052		1341
1053	ev_watcher_init (&once->io, once_cb_io);	1342	ev_watcher_init (&once->io, once_cb_io);
1054	if (fd >= 0)	1343	if (fd >= 0)
1055	{	1344	{
1056	ev_io_set (&once->io, fd, events);	1345	ev_io_set (&once->io, fd, events);
1057	ev_io_start (&once->io);	1346	ev_io_start (EV_A_ &once->io);
1058	}	1347	}
1059		1348
1060	ev_watcher_init (&once->to, once_cb_to);	1349	ev_watcher_init (&once->to, once_cb_to);
1061	if (timeout >= 0.)	1350	if (timeout >= 0.)
1062	{	1351	{
1063	ev_timer_set (&once->to, timeout, 0.);	1352	ev_timer_set (&once->to, timeout, 0.);
1064	ev_timer_start (&once->to);	1353	ev_timer_start (EV_A_ &once->to);
1065	}	1354	}
1066	}	1355	}
1067	}	1356	}
1068		1357
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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