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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 1.60 by root, Sun Nov 4 18:29:44 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	30	*/
31	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
32	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
33	#endif	55	#endif
34		56
35	#include <math.h>	57	#include <math.h>
36	#include <stdlib.h>	58	#include <stdlib.h>
37	#include <unistd.h>	59	#include <unistd.h>
…		…
42	#include <stdio.h>	64	#include <stdio.h>
43		65
44	#include <assert.h>	66	#include <assert.h>
45	#include <errno.h>	67	#include <errno.h>
46	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
47	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
48	#include <sys/time.h>	72	#include <sys/time.h>
49	#include <time.h>	73	#include <time.h>
50		74
		75	/**/
		76
51	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
54	# endif
55	#endif	79	#endif
56		80
57	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
59	#endif	83	#endif
60		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
61	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
63	#endif	91	#endif
64		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_REALTIME
		98	# define EV_USE_REALTIME 1
		99	#endif
		100
		101	/**/
		102
		103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
		105	# define EV_USE_MONOTONIC 0
		106	#endif
		107
65	#ifndef CLOCK_REALTIME	108	#ifndef CLOCK_REALTIME
		109	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	110	# define EV_USE_REALTIME 0
67	#endif	111	#endif
68	#ifndef EV_USE_REALTIME	112
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	113	/**/
70	#endif
71		114
72	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#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) */	116	#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 */	117	#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 */	118	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
76		119
77	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
78		135
79	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
82		139
83	static ev_tstamp now, diff; /* monotonic clock */	140	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		141
93	/*****************************************************************************/	142	/*****************************************************************************/
94		143
95	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
96	ev_time (void)	178	ev_time (void)
97	{	179	{
98	#if EV_USE_REALTIME	180	#if EV_USE_REALTIME
99	struct timespec ts;	181	struct timespec ts;
100	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
…		…
104	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	188	#endif
107	}	189	}
108		190
109	static ev_tstamp	191	inline ev_tstamp
110	get_clock (void)	192	get_clock (void)
111	{	193	{
112	#if EV_USE_MONOTONIC	194	#if EV_USE_MONOTONIC
113	if (have_monotonic)	195	if (expect_true (have_monotonic))
114	{	196	{
115	struct timespec ts;	197	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	200	}
119	#endif	201	#endif
120		202
121	return ev_time ();	203	return ev_time ();
122	}	204	}
123		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
124	#define array_roundsize(base,n) ((n) | 4 & ~3)	212	#define array_roundsize(base,n) ((n) | 4 & ~3)
125		213
126	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
127	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
128	{ \	216	{ \
129	int newcnt = cur; \	217	int newcnt = cur; \
130	do \	218	do \
131	{ \	219	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	220	newcnt = array_roundsize (base, newcnt << 1); \
…		…
138	cur = newcnt; \	226	cur = newcnt; \
139	}	227	}
140		228
141	/*****************************************************************************/	229	/*****************************************************************************/
142		230
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	231	static void
154	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
155	{	233	{
156	while (count--)	234	while (count--)
157	{	235	{
…		…
161		239
162	++base;	240	++base;
163	}	241	}
164	}	242	}
165		243
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	244	static void
176	event (W w, int events)	245	event (EV_P_ W w, int events)
177	{	246	{
178	if (w->pending)	247	if (w->pending)
179	{	248	{
180	pendings [w->pending - 1].events |= events;	249	pendings [ABSPRI (w)][w->pending - 1].events |= events;
181	return;	250	return;
182	}	251	}
183		252
184	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
186	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
187	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
188	}	257	}
189		258
190	static void	259	static void
191	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	261	{
193	int i;	262	int i;
194		263
195	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	265	event (EV_A_ events [i], type);
197	}	266	}
198		267
199	static void	268	static void
200	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
201	{	270	{
202	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	272	struct ev_io *w;
204		273
205	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
206	{	275	{
207	int ev = w->events & events;	276	int ev = w->events & events;
208		277
209	if (ev)	278	if (ev)
210	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
211	}	280	}
212	}	281	}
213		282
214	/*****************************************************************************/	283	/*****************************************************************************/
215		284
216	static int *fdchanges;
217	static int fdchangemax, fdchangecnt;
218
219	static void	285	static void
220	fd_reify (void)	286	fd_reify (EV_P)
221	{	287	{
222	int i;	288	int i;
223		289
224	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
225	{	291	{
…		…
227	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	294	struct ev_io *w;
229		295
230	int events = 0;	296	int events = 0;
231		297
232	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
233	events |= w->events;	299	events |= w->events;
234		300
235	anfd->reify = 0;	301	anfd->reify = 0;
236		302
237	if (anfd->events != events)	303	if (anfd->events != events)
238	{	304	{
239	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	306	anfd->events = events;
241	}	307	}
242	}	308	}
243		309
244	fdchangecnt = 0;	310	fdchangecnt = 0;
245	}	311	}
246		312
247	static void	313	static void
248	fd_change (int fd)	314	fd_change (EV_P_ int fd)
249	{	315	{
250	if (anfds [fd].reify || fdchangecnt < 0)	316	if (anfds [fd].reify || fdchangecnt < 0)
251	return;	317	return;
252		318
253	anfds [fd].reify = 1;	319	anfds [fd].reify = 1;
…		…
255	++fdchangecnt;	321	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
257	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
258	}	324	}
259		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		335	}
		336	}
		337
260	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
261	static void	339	static void
262	fd_recheck (void)	340	fd_ebadf (EV_P)
263	{	341	{
264	int fd;	342	int fd;
265		343
266	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	345	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
269	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
270	{	358	{
271	ev_io_stop (anfds [fd].head);	359	close (fd);
272	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	360	fd_kill (EV_A_ fd);
		361	return;
273	}	362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
274	}	378	}
275		379
276	/*****************************************************************************/	380	/*****************************************************************************/
277		381
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	382	static void
285	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
286	{	384	{
287	WT w = timers [k];	385	WT w = heap [k];
288		386
289	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
290	{	388	{
291	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
293	k >>= 1;	391	k >>= 1;
294	}	392	}
295		393
296	timers [k] = w;	394	heap [k] = w;
297	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
298		396
299	}	397	}
300		398
301	static void	399	static void
302	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
303	{	401	{
304	WT w = timers [k];	402	WT w = heap [k];
305		403
306	while (k < (N >> 1))	404	while (k < (N >> 1))
307	{	405	{
308	int j = k << 1;	406	int j = k << 1;
309		407
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	409	++j;
312		410
313	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
314	break;	412	break;
315		413
316	timers [k] = timers [j];	414	heap [k] = heap [j];
317	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
318	k = j;	416	k = j;
319	}	417	}
320		418
321	timers [k] = w;	419	heap [k] = w;
322	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
323	}	421	}
324		422
325	/*****************************************************************************/	423	/*****************************************************************************/
326		424
327	typedef struct	425	typedef struct
328	{	426	{
329	struct ev_signal *head;	427	struct ev_watcher_list *head;
330	sig_atomic_t volatile gotsig;	428	sig_atomic_t volatile gotsig;
331	} ANSIG;	429	} ANSIG;
332		430
333	static ANSIG *signals;	431	static ANSIG *signals;
334	static int signalmax;	432	static int signalmax;
…		…
354	{	452	{
355	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
356		454
357	if (!gotsig)	455	if (!gotsig)
358	{	456	{
		457	int old_errno = errno;
359	gotsig = 1;	458	gotsig = 1;
360	write (sigpipe [1], &signum, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
361	}	461	}
362	}	462	}
363		463
364	static void	464	static void
365	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
366	{	466	{
367	struct ev_signal *w;	467	struct ev_watcher_list *w;
368	int sig;	468	int signum;
369		469
370	read (sigpipe [0], &revents, 1);	470	read (sigpipe [0], &revents, 1);
371	gotsig = 0;	471	gotsig = 0;
372		472
373	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
375	{	475	{
376	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
377		477
378	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
380	}	480	}
381	}	481	}
382		482
383	static void	483	static void
384	siginit (void)	484	siginit (EV_P)
385	{	485	{
		486	#ifndef WIN32
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388		489
389	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
392		494
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	498	}
396		499
397	/*****************************************************************************/	500	/*****************************************************************************/
398		501
399	static struct ev_idle **idles;	502	#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		503
410	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
411	static struct ev_signal childev;	505	static struct ev_signal childev;
412		506
413	#ifndef WCONTINUED	507	#ifndef WCONTINUED
414	# define WCONTINUED 0	508	# define WCONTINUED 0
415	#endif	509	#endif
416		510
417	static void	511	static void
418	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
419	{	513	{
420	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		517	if (w->pid == pid || !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it *now* */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
421	int pid, status;	529	int pid, status;
422		530
423	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
425	if (w->pid == pid || w->pid == -1)	533	/* make sure we are called again until all childs have been reaped */
426	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
427	w->status = status;	535
428	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
429	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
430	}	539	}
		540
		541	#endif
431		542
432	/*****************************************************************************/	543	/*****************************************************************************/
433		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
434	#if EV_USE_EPOLL	548	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	549	# include "ev_epoll.c"
436	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
437	#if EV_USE_SELECT	554	#if EV_USE_SELECT
438	# include "ev_select.c"	555	# include "ev_select.c"
439	#endif	556	#endif
440		557
441	int	558	int
…		…
448	ev_version_minor (void)	565	ev_version_minor (void)
449	{	566	{
450	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
451	}	568	}
452		569
453	int ev_init (int flags)	570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
454	{	573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	|| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
455	if (!ev_method)	591	if (!method)
456	{	592	{
457	#if EV_USE_MONOTONIC	593	#if EV_USE_MONOTONIC
458	{	594	{
459	struct timespec ts;	595	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	597	have_monotonic = 1;
462	}	598	}
463	#endif	599	#endif
464		600
465	ev_now = ev_time ();	601	rt_now = ev_time ();
466	now = get_clock ();	602	mn_now = get_clock ();
		603	now_floor = mn_now;
467	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
468		605
469	if (pipe (sigpipe))	606	if (methods == EVMETHOD_AUTO)
470	return 0;	607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
471		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
472	ev_method = EVMETHOD_NONE;	610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
473	#if EV_USE_EPOLL	616	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
475	#endif	621	#endif
476	#if EV_USE_SELECT	622	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
478	#endif	624	#endif
		625	}
		626	}
479		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/*TODO*/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/*TODO*/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
		702	if (pipe (sigpipe))
		703	return 0;
		704
		705	if (!default_loop)
		706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
480	if (ev_method)	715	if (ev_method (EV_A))
481	{	716	{
482	ev_watcher_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
483	siginit ();	719	siginit (EV_A);
484		720
		721	#ifndef WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
487	}	727	}
		728	else
		729	default_loop = 0;
488	}	730	}
489		731
490	return ev_method;	732	return default_loop;
491	}	733	}
492		734
493	/*****************************************************************************/
494
495	void	735	void
496	ev_fork_prepare (void)	736	ev_default_destroy (void)
497	{	737	{
498	/* nop */	738	#if EV_MULTIPLICITY
499	}	739	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	740	#endif
514		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
515	ev_io_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
516	close (sigpipe [0]);	764	close (sigpipe [0]);
517	close (sigpipe [1]);	765	close (sigpipe [1]);
518	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
519	siginit ();	769	siginit (EV_A);
520	}	770	}
521		771
522	/*****************************************************************************/	772	/*****************************************************************************/
523		773
524	static void	774	static void
525	call_pending (void)	775	call_pending (EV_P)
526	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	780	while (pendingcnt [pri])
528	{	781	{
529	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		783
531	if (p->w)	784	if (p->w)
532	{	785	{
533	p->w->pending = 0;	786	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
535	}	788	}
536	}	789	}
537	}	790	}
538		791
539	static void	792	static void
540	timers_reify (void)	793	timers_reify (EV_P)
541	{	794	{
542	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
543	{	796	{
544	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
545		798
546	/* first reschedule or stop timer */	799	/* first reschedule or stop timer */
547	if (w->repeat)	800	if (w->repeat)
548	{	801	{
549	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	802	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
550	w->at = now + w->repeat;	803	w->at = mn_now + w->repeat;
551	downheap ((WT *)timers, timercnt, 0);	804	downheap ((WT *)timers, timercnt, 0);
552	}	805	}
553	else	806	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	807	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		808
556	event ((W)w, EV_TIMEOUT);	809	event (EV_A_ (W)w, EV_TIMEOUT);
557	}	810	}
558	}	811	}
559		812
560	static void	813	static void
561	periodics_reify (void)	814	periodics_reify (EV_P)
562	{	815	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	816	while (periodiccnt && periodics [0]->at <= rt_now)
564	{	817	{
565	struct ev_periodic *w = periodics [0];	818	struct ev_periodic *w = periodics [0];
566		819
567	/* first reschedule or stop timer */	820	/* first reschedule or stop timer */
568	if (w->interval)	821	if (w->interval)
569	{	822	{
570	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	823	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));	824	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
572	downheap ((WT *)periodics, periodiccnt, 0);	825	downheap ((WT *)periodics, periodiccnt, 0);
573	}	826	}
574	else	827	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	828	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		829
577	event ((W)w, EV_PERIODIC);	830	event (EV_A_ (W)w, EV_PERIODIC);
578	}	831	}
579	}	832	}
580		833
581	static void	834	static void
582	periodics_reschedule (ev_tstamp diff)	835	periodics_reschedule (EV_P)
583	{	836	{
584	int i;	837	int i;
585		838
586	/* adjust periodics after time jump */	839	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	840	for (i = 0; i < periodiccnt; ++i)
588	{	841	{
589	struct ev_periodic *w = periodics [i];	842	struct ev_periodic *w = periodics [i];
590		843
591	if (w->interval)	844	if (w->interval)
592	{	845	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	846	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
594		847
595	if (fabs (diff) >= 1e-4)	848	if (fabs (diff) >= 1e-4)
596	{	849	{
597	ev_periodic_stop (w);	850	ev_periodic_stop (EV_A_ w);
598	ev_periodic_start (w);	851	ev_periodic_start (EV_A_ w);
599		852
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	853	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	854	}
602	}	855	}
603	}	856	}
604	}	857	}
605		858
		859	inline int
		860	time_update_monotonic (EV_P)
		861	{
		862	mn_now = get_clock ();
		863
		864	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		865	{
		866	rt_now = rtmn_diff + mn_now;
		867	return 0;
		868	}
		869	else
		870	{
		871	now_floor = mn_now;
		872	rt_now = ev_time ();
		873	return 1;
		874	}
		875	}
		876
606	static void	877	static void
607	time_update (void)	878	time_update (EV_P)
608	{	879	{
609	int i;	880	int i;
610		881
611	ev_now = ev_time ();	882	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	883	if (expect_true (have_monotonic))
614	{	884	{
615	ev_tstamp odiff = diff;	885	if (time_update_monotonic (EV_A))
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	886	{
619	now = get_clock ();	887	ev_tstamp odiff = rtmn_diff;
		888
		889	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		890	{
620	diff = ev_now - now;	891	rtmn_diff = rt_now - mn_now;
621		892
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	893	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	894	return; /* all is well */
624		895
625	ev_now = ev_time ();	896	rt_now = ev_time ();
		897	mn_now = get_clock ();
		898	now_floor = mn_now;
		899	}
		900
		901	periodics_reschedule (EV_A);
		902	/* no timer adjustment, as the monotonic clock doesn't jump */
		903	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
626	}	904	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}	905	}
631	else	906	else
		907	#endif
632	{	908	{
633	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	909	rt_now = ev_time ();
		910
		911	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
634	{	912	{
635	periodics_reschedule (ev_now - now);	913	periodics_reschedule (EV_A);
636		914
637	/* adjust timers. this is easy, as the offset is the same for all */	915	/* adjust timers. this is easy, as the offset is the same for all */
638	for (i = 0; i < timercnt; ++i)	916	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	917	timers [i]->at += rt_now - mn_now;
640	}	918	}
641		919
642	now = ev_now;	920	mn_now = rt_now;
643	}	921	}
644	}	922	}
645		923
646	int ev_loop_done;	924	void
		925	ev_ref (EV_P)
		926	{
		927	++activecnt;
		928	}
647		929
		930	void
		931	ev_unref (EV_P)
		932	{
		933	--activecnt;
		934	}
		935
		936	static int loop_done;
		937
		938	void
648	void ev_loop (int flags)	939	ev_loop (EV_P_ int flags)
649	{	940	{
650	double block;	941	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	942	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
652		943
653	do	944	do
654	{	945	{
655	/* queue check watchers (and execute them) */	946	/* queue check watchers (and execute them) */
656	if (preparecnt)	947	if (expect_false (preparecnt))
657	{	948	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	949	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	950	call_pending (EV_A);
660	}	951	}
661		952
662	/* update fd-related kernel structures */	953	/* update fd-related kernel structures */
663	fd_reify ();	954	fd_reify (EV_A);
664		955
665	/* calculate blocking time */	956	/* calculate blocking time */
666		957
667	/* we only need this for !monotonic clockor timers, but as we basically	958	/* we only need this for !monotonic clockor timers, but as we basically
668	always have timers, we just calculate it always */	959	always have timers, we just calculate it always */
		960	#if EV_USE_MONOTONIC
		961	if (expect_true (have_monotonic))
		962	time_update_monotonic (EV_A);
		963	else
		964	#endif
		965	{
669	ev_now = ev_time ();	966	rt_now = ev_time ();
		967	mn_now = rt_now;
		968	}
670		969
671	if (flags & EVLOOP_NONBLOCK || idlecnt)	970	if (flags & EVLOOP_NONBLOCK || idlecnt)
672	block = 0.;	971	block = 0.;
673	else	972	else
674	{	973	{
675	block = MAX_BLOCKTIME;	974	block = MAX_BLOCKTIME;
676		975
677	if (timercnt)	976	if (timercnt)
678	{	977	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	978	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
680	if (block > to) block = to;	979	if (block > to) block = to;
681	}	980	}
682		981
683	if (periodiccnt)	982	if (periodiccnt)
684	{	983	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	984	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
686	if (block > to) block = to;	985	if (block > to) block = to;
687	}	986	}
688		987
689	if (block < 0.) block = 0.;	988	if (block < 0.) block = 0.;
690	}	989	}
691		990
692	method_poll (block);	991	method_poll (EV_A_ block);
693		992
694	/* update ev_now, do magic */	993	/* update rt_now, do magic */
695	time_update ();	994	time_update (EV_A);
696		995
697	/* queue pending timers and reschedule them */	996	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	997	timers_reify (EV_A); /* relative timers called last */
699	periodics_reify (); /* absolute timers called first */	998	periodics_reify (EV_A); /* absolute timers called first */
700		999
701	/* queue idle watchers unless io or timers are pending */	1000	/* queue idle watchers unless io or timers are pending */
702	if (!pendingcnt)	1001	if (!pendingcnt)
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	1002	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		1003
705	/* queue check watchers, to be executed first */	1004	/* queue check watchers, to be executed first */
706	if (checkcnt)	1005	if (checkcnt)
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	1006	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		1007
709	call_pending ();	1008	call_pending (EV_A);
710	}	1009	}
711	while (!ev_loop_done);	1010	while (activecnt && !loop_done);
712		1011
713	if (ev_loop_done != 2)	1012	if (loop_done != 2)
714	ev_loop_done = 0;	1013	loop_done = 0;
		1014	}
		1015
		1016	void
		1017	ev_unloop (EV_P_ int how)
		1018	{
		1019	loop_done = how;
715	}	1020	}
716		1021
717	/*****************************************************************************/	1022	/*****************************************************************************/
718		1023
719	static void	1024	inline void
720	wlist_add (WL *head, WL elem)	1025	wlist_add (WL *head, WL elem)
721	{	1026	{
722	elem->next = *head;	1027	elem->next = *head;
723	*head = elem;	1028	*head = elem;
724	}	1029	}
725		1030
726	static void	1031	inline void
727	wlist_del (WL *head, WL elem)	1032	wlist_del (WL *head, WL elem)
728	{	1033	{
729	while (*head)	1034	while (*head)
730	{	1035	{
731	if (*head == elem)	1036	if (*head == elem)
…		…
736		1041
737	head = &(*head)->next;	1042	head = &(*head)->next;
738	}	1043	}
739	}	1044	}
740		1045
741	static void	1046	inline void
742	ev_clear_pending (W w)	1047	ev_clear_pending (EV_P_ W w)
743	{	1048	{
744	if (w->pending)	1049	if (w->pending)
745	{	1050	{
746	pendings [w->pending - 1].w = 0;	1051	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1052	w->pending = 0;
748	}	1053	}
749	}	1054	}
750		1055
751	static void	1056	inline void
752	ev_start (W w, int active)	1057	ev_start (EV_P_ W w, int active)
753	{	1058	{
		1059	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1060	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1061
754	w->active = active;	1062	w->active = active;
		1063	ev_ref (EV_A);
755	}	1064	}
756		1065
757	static void	1066	inline void
758	ev_stop (W w)	1067	ev_stop (EV_P_ W w)
759	{	1068	{
		1069	ev_unref (EV_A);
760	w->active = 0;	1070	w->active = 0;
761	}	1071	}
762		1072
763	/*****************************************************************************/	1073	/*****************************************************************************/
764		1074
765	void	1075	void
766	ev_io_start (struct ev_io *w)	1076	ev_io_start (EV_P_ struct ev_io *w)
767	{	1077	{
		1078	int fd = w->fd;
		1079
768	if (ev_is_active (w))	1080	if (ev_is_active (w))
769	return;	1081	return;
770		1082
771	int fd = w->fd;
772
773	assert (("ev_io_start called with negative fd", fd >= 0));	1083	assert (("ev_io_start called with negative fd", fd >= 0));
774		1084
775	ev_start ((W)w, 1);	1085	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1086	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1087	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1088
779	fd_change (fd);	1089	fd_change (EV_A_ fd);
780	}	1090	}
781		1091
782	void	1092	void
783	ev_io_stop (struct ev_io *w)	1093	ev_io_stop (EV_P_ struct ev_io *w)
784	{	1094	{
785	ev_clear_pending ((W)w);	1095	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1096	if (!ev_is_active (w))
787	return;	1097	return;
788		1098
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1099	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1100	ev_stop (EV_A_ (W)w);
791		1101
792	fd_change (w->fd);	1102	fd_change (EV_A_ w->fd);
793	}	1103	}
794		1104
795	void	1105	void
796	ev_timer_start (struct ev_timer *w)	1106	ev_timer_start (EV_P_ struct ev_timer *w)
797	{	1107	{
798	if (ev_is_active (w))	1108	if (ev_is_active (w))
799	return;	1109	return;
800		1110
801	w->at += now;	1111	w->at += mn_now;
802		1112
803	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1113	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
804		1114
805	ev_start ((W)w, ++timercnt);	1115	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1116	array_needsize (timers, timermax, timercnt, );
807	timers [timercnt - 1] = w;	1117	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1118	upheap ((WT *)timers, timercnt - 1);
809	}	1119	}
810		1120
811	void	1121	void
812	ev_timer_stop (struct ev_timer *w)	1122	ev_timer_stop (EV_P_ struct ev_timer *w)
813	{	1123	{
814	ev_clear_pending ((W)w);	1124	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1125	if (!ev_is_active (w))
816	return;	1126	return;
817		1127
818	if (w->active < timercnt--)	1128	if (w->active < timercnt--)
819	{	1129	{
…		…
821	downheap ((WT *)timers, timercnt, w->active - 1);	1131	downheap ((WT *)timers, timercnt, w->active - 1);
822	}	1132	}
823		1133
824	w->at = w->repeat;	1134	w->at = w->repeat;
825		1135
826	ev_stop ((W)w);	1136	ev_stop (EV_A_ (W)w);
827	}	1137	}
828		1138
829	void	1139	void
830	ev_timer_again (struct ev_timer *w)	1140	ev_timer_again (EV_P_ struct ev_timer *w)
831	{	1141	{
832	if (ev_is_active (w))	1142	if (ev_is_active (w))
833	{	1143	{
834	if (w->repeat)	1144	if (w->repeat)
835	{	1145	{
836	w->at = now + w->repeat;	1146	w->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1147	downheap ((WT *)timers, timercnt, w->active - 1);
838	}	1148	}
839	else	1149	else
840	ev_timer_stop (w);	1150	ev_timer_stop (EV_A_ w);
841	}	1151	}
842	else if (w->repeat)	1152	else if (w->repeat)
843	ev_timer_start (w);	1153	ev_timer_start (EV_A_ w);
844	}	1154	}
845		1155
846	void	1156	void
847	ev_periodic_start (struct ev_periodic *w)	1157	ev_periodic_start (EV_P_ struct ev_periodic *w)
848	{	1158	{
849	if (ev_is_active (w))	1159	if (ev_is_active (w))
850	return;	1160	return;
851		1161
852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1162	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
853		1163
854	/* this formula differs from the one in periodic_reify because we do not always round up */	1164	/* this formula differs from the one in periodic_reify because we do not always round up */
855	if (w->interval)	1165	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1166	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
857		1167
858	ev_start ((W)w, ++periodiccnt);	1168	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1169	array_needsize (periodics, periodicmax, periodiccnt, );
860	periodics [periodiccnt - 1] = w;	1170	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1171	upheap ((WT *)periodics, periodiccnt - 1);
862	}	1172	}
863		1173
864	void	1174	void
865	ev_periodic_stop (struct ev_periodic *w)	1175	ev_periodic_stop (EV_P_ struct ev_periodic *w)
866	{	1176	{
867	ev_clear_pending ((W)w);	1177	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1178	if (!ev_is_active (w))
869	return;	1179	return;
870		1180
871	if (w->active < periodiccnt--)	1181	if (w->active < periodiccnt--)
872	{	1182	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1183	periodics [w->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1184	downheap ((WT *)periodics, periodiccnt, w->active - 1);
875	}	1185	}
876		1186
877	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
878	}	1188	}
879		1189
880	void	1190	void
881	ev_signal_start (struct ev_signal *w)	1191	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1192	{
883	if (ev_is_active (w))	1193	if (ev_is_active (w))
884	return;	1194	return;
885		1195
		1196	ev_start (EV_A_ (W)w, ++idlecnt);
		1197	array_needsize (idles, idlemax, idlecnt, );
		1198	idles [idlecnt - 1] = w;
		1199	}
		1200
		1201	void
		1202	ev_idle_stop (EV_P_ struct ev_idle *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	idles [w->active - 1] = idles [--idlecnt];
		1209	ev_stop (EV_A_ (W)w);
		1210	}
		1211
		1212	void
		1213	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1214	{
		1215	if (ev_is_active (w))
		1216	return;
		1217
		1218	ev_start (EV_A_ (W)w, ++preparecnt);
		1219	array_needsize (prepares, preparemax, preparecnt, );
		1220	prepares [preparecnt - 1] = w;
		1221	}
		1222
		1223	void
		1224	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1225	{
		1226	ev_clear_pending (EV_A_ (W)w);
		1227	if (ev_is_active (w))
		1228	return;
		1229
		1230	prepares [w->active - 1] = prepares [--preparecnt];
		1231	ev_stop (EV_A_ (W)w);
		1232	}
		1233
		1234	void
		1235	ev_check_start (EV_P_ struct ev_check *w)
		1236	{
		1237	if (ev_is_active (w))
		1238	return;
		1239
		1240	ev_start (EV_A_ (W)w, ++checkcnt);
		1241	array_needsize (checks, checkmax, checkcnt, );
		1242	checks [checkcnt - 1] = w;
		1243	}
		1244
		1245	void
		1246	ev_check_stop (EV_P_ struct ev_check *w)
		1247	{
		1248	ev_clear_pending (EV_A_ (W)w);
		1249	if (ev_is_active (w))
		1250	return;
		1251
		1252	checks [w->active - 1] = checks [--checkcnt];
		1253	ev_stop (EV_A_ (W)w);
		1254	}
		1255
		1256	#ifndef SA_RESTART
		1257	# define SA_RESTART 0
		1258	#endif
		1259
		1260	void
		1261	ev_signal_start (EV_P_ struct ev_signal *w)
		1262	{
		1263	#if EV_MULTIPLICITY
		1264	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1265	#endif
		1266	if (ev_is_active (w))
		1267	return;
		1268
886	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1269	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
887		1270
888	ev_start ((W)w, 1);	1271	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1272	array_needsize (signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1273	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1274
892	if (!w->next)	1275	if (!w->next)
893	{	1276	{
894	struct sigaction sa;	1277	struct sigaction sa;
895	sa.sa_handler = sighandler;	1278	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1279	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1280	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1281	sigaction (w->signum, &sa, 0);
899	}	1282	}
900	}	1283	}
901		1284
902	void	1285	void
903	ev_signal_stop (struct ev_signal *w)	1286	ev_signal_stop (EV_P_ struct ev_signal *w)
904	{	1287	{
905	ev_clear_pending ((W)w);	1288	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1289	if (!ev_is_active (w))
907	return;	1290	return;
908		1291
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1292	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
911		1294
912	if (!signals [w->signum - 1].head)	1295	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1296	signal (w->signum, SIG_DFL);
914	}	1297	}
915		1298
916	void	1299	void
917	ev_idle_start (struct ev_idle *w)	1300	ev_child_start (EV_P_ struct ev_child *w)
918	{	1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
919	if (ev_is_active (w))	1305	if (ev_is_active (w))
920	return;	1306	return;
921		1307
922	ev_start ((W)w, ++idlecnt);	1308	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	1309	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	1310	}
926		1311
927	void	1312	void
928	ev_idle_stop (struct ev_idle *w)	1313	ev_child_stop (EV_P_ struct ev_child *w)
929	{	1314	{
930	ev_clear_pending ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1316	if (ev_is_active (w))
932	return;	1317	return;
933		1318
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);	1319	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
1001	}	1321	}
1002		1322
1003	/*****************************************************************************/	1323	/*****************************************************************************/
1004		1324
1005	struct ev_once	1325	struct ev_once
…		…
1009	void (*cb)(int revents, void *arg);	1329	void (*cb)(int revents, void *arg);
1010	void *arg;	1330	void *arg;
1011	};	1331	};
1012		1332
1013	static void	1333	static void
1014	once_cb (struct ev_once *once, int revents)	1334	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1335	{
1016	void (*cb)(int revents, void *arg) = once->cb;	1336	void (*cb)(int revents, void *arg) = once->cb;
1017	void *arg = once->arg;	1337	void *arg = once->arg;
1018		1338
1019	ev_io_stop (&once->io);	1339	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1340	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1341	free (once);
1022		1342
1023	cb (revents, arg);	1343	cb (revents, arg);
1024	}	1344	}
1025		1345
1026	static void	1346	static void
1027	once_cb_io (struct ev_io *w, int revents)	1347	once_cb_io (EV_P_ struct ev_io *w, int revents)
1028	{	1348	{
1029	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1349	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1030	}	1350	}
1031		1351
1032	static void	1352	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1353	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1034	{	1354	{
1035	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1355	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1036	}	1356	}
1037		1357
1038	void	1358	void
1039	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1359	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1040	{	1360	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1361	struct ev_once *once = malloc (sizeof (struct ev_once));
1042		1362
1043	if (!once)	1363	if (!once)
1044	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1364	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1049		1369
1050	ev_watcher_init (&once->io, once_cb_io);	1370	ev_watcher_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1371	if (fd >= 0)
1052	{	1372	{
1053	ev_io_set (&once->io, fd, events);	1373	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1374	ev_io_start (EV_A_ &once->io);
1055	}	1375	}
1056		1376
1057	ev_watcher_init (&once->to, once_cb_to);	1377	ev_watcher_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1378	if (timeout >= 0.)
1059	{	1379	{
1060	ev_timer_set (&once->to, timeout, 0.);	1380	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1381	ev_timer_start (EV_A_ &once->to);
1062	}	1382	}
1063	}	1383	}
1064	}	1384	}
1065		1385
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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