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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 1.61 by root, Sun Nov 4 19:45:09 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	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
53	#endif	79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		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
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		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	/**/
54		102
55	#ifndef CLOCK_MONOTONIC	103	#ifndef CLOCK_MONOTONIC
56	# undef EV_USE_MONOTONIC	104	# undef EV_USE_MONOTONIC
57	# define EV_USE_MONOTONIC 0	105	# define EV_USE_MONOTONIC 0
58	#endif	106	#endif
59		107
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	108	#ifndef CLOCK_REALTIME
		109	# undef EV_USE_REALTIME
69	# define EV_USE_REALTIME 0	110	# define EV_USE_REALTIME 0
70	#endif	111	#endif
71	#ifndef EV_USE_REALTIME	112
72	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	113	/**/
73	#endif
74		114
75	#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) */
76	#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) */
77	#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 */
78	#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 */
79		119
80	#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)
81		135
82	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
83	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
84	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
85		139
86	static ev_tstamp now, diff; /* monotonic clock */	140	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		141
96	/*****************************************************************************/	142	/*****************************************************************************/
97		143
98	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
99	ev_time (void)	178	ev_time (void)
100	{	179	{
101	#if EV_USE_REALTIME	180	#if EV_USE_REALTIME
102	struct timespec ts;	181	struct timespec ts;
103	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
…		…
107	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
108	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
109	#endif	188	#endif
110	}	189	}
111		190
112	static ev_tstamp	191	inline ev_tstamp
113	get_clock (void)	192	get_clock (void)
114	{	193	{
115	#if EV_USE_MONOTONIC	194	#if EV_USE_MONOTONIC
116	if (have_monotonic)	195	if (expect_true (have_monotonic))
117	{	196	{
118	struct timespec ts;	197	struct timespec ts;
119	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
120	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
121	}	200	}
122	#endif	201	#endif
123		202
124	return ev_time ();	203	return ev_time ();
125	}	204	}
126		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
127	#define array_roundsize(base,n) ((n) | 4 & ~3)	212	#define array_roundsize(base,n) ((n) | 4 & ~3)
128		213
129	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
130	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
131	{ \	216	{ \
132	int newcnt = cur; \	217	int newcnt = cur; \
133	do \	218	do \
134	{ \	219	{ \
135	newcnt = array_roundsize (base, newcnt << 1); \	220	newcnt = array_roundsize (base, newcnt << 1); \
…		…
141	cur = newcnt; \	226	cur = newcnt; \
142	}	227	}
143		228
144	/*****************************************************************************/	229	/*****************************************************************************/
145		230
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	231	static void
157	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
158	{	233	{
159	while (count--)	234	while (count--)
160	{	235	{
…		…
164		239
165	++base;	240	++base;
166	}	241	}
167	}	242	}
168		243
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	244	static void
179	event (W w, int events)	245	event (EV_P_ W w, int events)
180	{	246	{
181	if (w->pending)	247	if (w->pending)
182	{	248	{
183	pendings [w->pending - 1].events |= events;	249	pendings [ABSPRI (w)][w->pending - 1].events |= events;
184	return;	250	return;
185	}	251	}
186		252
187	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
188	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
189	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
190	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
191	}	257	}
192		258
193	static void	259	static void
194	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
195	{	261	{
196	int i;	262	int i;
197		263
198	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
199	event (events [i], type);	265	event (EV_A_ events [i], type);
200	}	266	}
201		267
202	static void	268	static void
203	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
204	{	270	{
205	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
206	struct ev_io *w;	272	struct ev_io *w;
207		273
208	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
209	{	275	{
210	int ev = w->events & events;	276	int ev = w->events & events;
211		277
212	if (ev)	278	if (ev)
213	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
214	}	280	}
215	}	281	}
216		282
217	/*****************************************************************************/	283	/*****************************************************************************/
218		284
219	static int *fdchanges;
220	static int fdchangemax, fdchangecnt;
221
222	static void	285	static void
223	fd_reify (void)	286	fd_reify (EV_P)
224	{	287	{
225	int i;	288	int i;
226		289
227	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
228	{	291	{
…		…
230	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
231	struct ev_io *w;	294	struct ev_io *w;
232		295
233	int events = 0;	296	int events = 0;
234		297
235	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
236	events |= w->events;	299	events |= w->events;
237		300
238	anfd->reify = 0;	301	anfd->reify = 0;
239		302
240	if (anfd->events != events)	303	if (anfd->events != events)
241	{	304	{
242	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
243	anfd->events = events;	306	anfd->events = events;
244	}	307	}
245	}	308	}
246		309
247	fdchangecnt = 0;	310	fdchangecnt = 0;
248	}	311	}
249		312
250	static void	313	static void
251	fd_change (int fd)	314	fd_change (EV_P_ int fd)
252	{	315	{
253	if (anfds [fd].reify || fdchangecnt < 0)	316	if (anfds [fd].reify || fdchangecnt < 0)
254	return;	317	return;
255		318
256	anfds [fd].reify = 1;	319	anfds [fd].reify = 1;
…		…
258	++fdchangecnt;	321	++fdchangecnt;
259	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
260	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
261	}	324	}
262		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
263	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
264	static void	339	static void
265	fd_recheck (void)	340	fd_ebadf (EV_P)
266	{	341	{
267	int fd;	342	int fd;
268		343
269	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
270	if (anfds [fd].events)	345	if (anfds [fd].events)
271	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
272	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)
273	{	358	{
274	ev_io_stop (anfds [fd].head);	359	close (fd);
275	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	360	fd_kill (EV_A_ fd);
		361	return;
276	}	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	}
277	}	378	}
278		379
279	/*****************************************************************************/	380	/*****************************************************************************/
280		381
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	382	static void
288	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
289	{	384	{
290	WT w = timers [k];	385	WT w = heap [k];
291		386
292	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
293	{	388	{
294	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
295	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
296	k >>= 1;	391	k >>= 1;
297	}	392	}
298		393
299	timers [k] = w;	394	heap [k] = w;
300	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
301		396
302	}	397	}
303		398
304	static void	399	static void
305	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
306	{	401	{
307	WT w = timers [k];	402	WT w = heap [k];
308		403
309	while (k < (N >> 1))	404	while (k < (N >> 1))
310	{	405	{
311	int j = k << 1;	406	int j = k << 1;
312		407
313	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
314	++j;	409	++j;
315		410
316	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
317	break;	412	break;
318		413
319	timers [k] = timers [j];	414	heap [k] = heap [j];
320	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
321	k = j;	416	k = j;
322	}	417	}
323		418
324	timers [k] = w;	419	heap [k] = w;
325	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
326	}	421	}
327		422
328	/*****************************************************************************/	423	/*****************************************************************************/
329		424
330	typedef struct	425	typedef struct
331	{	426	{
332	struct ev_signal *head;	427	struct ev_watcher_list *head;
333	sig_atomic_t volatile gotsig;	428	sig_atomic_t volatile gotsig;
334	} ANSIG;	429	} ANSIG;
335		430
336	static ANSIG *signals;	431	static ANSIG *signals;
337	static int signalmax;	432	static int signalmax;
…		…
357	{	452	{
358	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
359		454
360	if (!gotsig)	455	if (!gotsig)
361	{	456	{
		457	int old_errno = errno;
362	gotsig = 1;	458	gotsig = 1;
363	write (sigpipe [1], &signum, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
364	}	461	}
365	}	462	}
366		463
367	static void	464	static void
368	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
369	{	466	{
370	struct ev_signal *w;	467	struct ev_watcher_list *w;
371	int sig;	468	int signum;
372		469
373	read (sigpipe [0], &revents, 1);	470	read (sigpipe [0], &revents, 1);
374	gotsig = 0;	471	gotsig = 0;
375		472
376	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
377	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
378	{	475	{
379	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
380		477
381	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
382	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
383	}	480	}
384	}	481	}
385		482
386	static void	483	static void
387	siginit (void)	484	siginit (EV_P)
388	{	485	{
		486	#ifndef WIN32
389	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391		489
392	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
393	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
395		494
396	ev_io_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
397	ev_io_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
398	}	498	}
399		499
400	/*****************************************************************************/	500	/*****************************************************************************/
401		501
402	static struct ev_idle **idles;	502	#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		503
413	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
414	static struct ev_signal childev;	505	static struct ev_signal childev;
415		506
416	#ifndef WCONTINUED	507	#ifndef WCONTINUED
417	# define WCONTINUED 0	508	# define WCONTINUED 0
418	#endif	509	#endif
419		510
420	static void	511	static void
421	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
422	{	513	{
423	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	{
424	int pid, status;	529	int pid, status;
425		530
426	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
427	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
428	if (w->pid == pid || w->pid == -1)	533	/* make sure we are called again until all childs have been reaped */
429	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
430	w->status = status;	535
431	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
432	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
433	}	539	}
		540
		541	#endif
434		542
435	/*****************************************************************************/	543	/*****************************************************************************/
436		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
437	#if EV_USE_EPOLL	548	#if EV_USE_EPOLL
438	# include "ev_epoll.c"	549	# include "ev_epoll.c"
439	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
440	#if EV_USE_SELECT	554	#if EV_USE_SELECT
441	# include "ev_select.c"	555	# include "ev_select.c"
442	#endif	556	#endif
443		557
444	int	558	int
…		…
451	ev_version_minor (void)	565	ev_version_minor (void)
452	{	566	{
453	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
454	}	568	}
455		569
456	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)
457	{	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	{
458	if (!ev_method)	591	if (!method)
459	{	592	{
460	#if EV_USE_MONOTONIC	593	#if EV_USE_MONOTONIC
461	{	594	{
462	struct timespec ts;	595	struct timespec ts;
463	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
464	have_monotonic = 1;	597	have_monotonic = 1;
465	}	598	}
466	#endif	599	#endif
467		600
468	ev_now = ev_time ();	601	rt_now = ev_time ();
469	now = get_clock ();	602	mn_now = get_clock ();
		603	now_floor = mn_now;
470	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
471		605
472	if (pipe (sigpipe))	606	if (methods == EVMETHOD_AUTO)
473	return 0;	607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
474		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
475	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
476	#if EV_USE_EPOLL	616	#if EV_USE_EPOLL
477	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);
478	#endif	621	#endif
479	#if EV_USE_SELECT	622	#if EV_USE_SELECT
480	if (ev_method == EVMETHOD_NONE) select_init (flags);	623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
481	#endif	624	#endif
		625	}
		626	}
482		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
483	if (ev_method)	715	if (ev_method (EV_A))
484	{	716	{
485	ev_watcher_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
486	siginit ();	719	siginit (EV_A);
487		720
		721	#ifndef WIN32
488	ev_signal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
489	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
490	}	727	}
		728	else
		729	default_loop = 0;
491	}	730	}
492		731
493	return ev_method;	732	return default_loop;
494	}	733	}
495		734
496	/*****************************************************************************/
497
498	void	735	void
499	ev_fork_prepare (void)	736	ev_default_destroy (void)
500	{	737	{
501	/* nop */	738	#if EV_MULTIPLICITY
502	}	739	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	740	#endif
517		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
518	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);
519	close (sigpipe [0]);	764	close (sigpipe [0]);
520	close (sigpipe [1]);	765	close (sigpipe [1]);
521	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
522	siginit ();	769	siginit (EV_A);
523	}	770	}
524		771
525	/*****************************************************************************/	772	/*****************************************************************************/
526		773
527	static void	774	static void
528	call_pending (void)	775	call_pending (EV_P)
529	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
530	while (pendingcnt)	780	while (pendingcnt [pri])
531	{	781	{
532	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
533		783
534	if (p->w)	784	if (p->w)
535	{	785	{
536	p->w->pending = 0;	786	p->w->pending = 0;
537	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
538	}	788	}
539	}	789	}
540	}	790	}
541		791
542	static void	792	static void
543	timers_reify (void)	793	timers_reify (EV_P)
544	{	794	{
545	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
546	{	796	{
547	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
		798
		799	assert (("inactive timer on timer heap detected", ev_is_active (w)));
548		800
549	/* first reschedule or stop timer */	801	/* first reschedule or stop timer */
550	if (w->repeat)	802	if (w->repeat)
551	{	803	{
552	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	804	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
553	w->at = now + w->repeat;	805	w->at = mn_now + w->repeat;
554	downheap ((WT *)timers, timercnt, 0);	806	downheap ((WT *)timers, timercnt, 0);
555	}	807	}
556	else	808	else
557	ev_timer_stop (w); /* nonrepeating: stop timer */	809	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
558		810
559	event ((W)w, EV_TIMEOUT);	811	event (EV_A_ (W)w, EV_TIMEOUT);
560	}	812	}
561	}	813	}
562		814
563	static void	815	static void
564	periodics_reify (void)	816	periodics_reify (EV_P)
565	{	817	{
566	while (periodiccnt && periodics [0]->at <= ev_now)	818	while (periodiccnt && periodics [0]->at <= rt_now)
567	{	819	{
568	struct ev_periodic *w = periodics [0];	820	struct ev_periodic *w = periodics [0];
		821
		822	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
569		823
570	/* first reschedule or stop timer */	824	/* first reschedule or stop timer */
571	if (w->interval)	825	if (w->interval)
572	{	826	{
573	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	827	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));	828	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
575	downheap ((WT *)periodics, periodiccnt, 0);	829	downheap ((WT *)periodics, periodiccnt, 0);
576	}	830	}
577	else	831	else
578	ev_periodic_stop (w); /* nonrepeating: stop timer */	832	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
579		833
580	event ((W)w, EV_PERIODIC);	834	event (EV_A_ (W)w, EV_PERIODIC);
581	}	835	}
582	}	836	}
583		837
584	static void	838	static void
585	periodics_reschedule (ev_tstamp diff)	839	periodics_reschedule (EV_P)
586	{	840	{
587	int i;	841	int i;
588		842
589	/* adjust periodics after time jump */	843	/* adjust periodics after time jump */
590	for (i = 0; i < periodiccnt; ++i)	844	for (i = 0; i < periodiccnt; ++i)
591	{	845	{
592	struct ev_periodic *w = periodics [i];	846	struct ev_periodic *w = periodics [i];
593		847
594	if (w->interval)	848	if (w->interval)
595	{	849	{
596	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	850	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
597		851
598	if (fabs (diff) >= 1e-4)	852	if (fabs (diff) >= 1e-4)
599	{	853	{
600	ev_periodic_stop (w);	854	ev_periodic_stop (EV_A_ w);
601	ev_periodic_start (w);	855	ev_periodic_start (EV_A_ w);
602		856
603	i = 0; /* restart loop, inefficient, but time jumps should be rare */	857	i = 0; /* restart loop, inefficient, but time jumps should be rare */
604	}	858	}
605	}	859	}
606	}	860	}
607	}	861	}
608		862
		863	inline int
		864	time_update_monotonic (EV_P)
		865	{
		866	mn_now = get_clock ();
		867
		868	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		869	{
		870	rt_now = rtmn_diff + mn_now;
		871	return 0;
		872	}
		873	else
		874	{
		875	now_floor = mn_now;
		876	rt_now = ev_time ();
		877	return 1;
		878	}
		879	}
		880
609	static void	881	static void
610	time_update (void)	882	time_update (EV_P)
611	{	883	{
612	int i;	884	int i;
613		885
614	ev_now = ev_time ();	886	#if EV_USE_MONOTONIC
615
616	if (have_monotonic)	887	if (expect_true (have_monotonic))
617	{	888	{
618	ev_tstamp odiff = diff;	889	if (time_update_monotonic (EV_A))
619
620	for (i = 4; --i; ) /* loop a few times, before making important decisions */
621	{	890	{
622	now = get_clock ();	891	ev_tstamp odiff = rtmn_diff;
		892
		893	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		894	{
623	diff = ev_now - now;	895	rtmn_diff = rt_now - mn_now;
624		896
625	if (fabs (odiff - diff) < MIN_TIMEJUMP)	897	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
626	return; /* all is well */	898	return; /* all is well */
627		899
628	ev_now = ev_time ();	900	rt_now = ev_time ();
		901	mn_now = get_clock ();
		902	now_floor = mn_now;
		903	}
		904
		905	periodics_reschedule (EV_A);
		906	/* no timer adjustment, as the monotonic clock doesn't jump */
		907	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
629	}	908	}
630
631	periodics_reschedule (diff - odiff);
632	/* no timer adjustment, as the monotonic clock doesn't jump */
633	}	909	}
634	else	910	else
		911	#endif
635	{	912	{
636	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	913	rt_now = ev_time ();
		914
		915	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
637	{	916	{
638	periodics_reschedule (ev_now - now);	917	periodics_reschedule (EV_A);
639		918
640	/* adjust timers. this is easy, as the offset is the same for all */	919	/* adjust timers. this is easy, as the offset is the same for all */
641	for (i = 0; i < timercnt; ++i)	920	for (i = 0; i < timercnt; ++i)
642	timers [i]->at += diff;	921	timers [i]->at += rt_now - mn_now;
643	}	922	}
644		923
645	now = ev_now;	924	mn_now = rt_now;
646	}	925	}
647	}	926	}
648		927
649	int ev_loop_done;	928	void
		929	ev_ref (EV_P)
		930	{
		931	++activecnt;
		932	}
650		933
		934	void
		935	ev_unref (EV_P)
		936	{
		937	--activecnt;
		938	}
		939
		940	static int loop_done;
		941
		942	void
651	void ev_loop (int flags)	943	ev_loop (EV_P_ int flags)
652	{	944	{
653	double block;	945	double block;
654	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	946	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
655		947
656	do	948	do
657	{	949	{
658	/* queue check watchers (and execute them) */	950	/* queue check watchers (and execute them) */
659	if (preparecnt)	951	if (expect_false (preparecnt))
660	{	952	{
661	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	953	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662	call_pending ();	954	call_pending (EV_A);
663	}	955	}
664		956
665	/* update fd-related kernel structures */	957	/* update fd-related kernel structures */
666	fd_reify ();	958	fd_reify (EV_A);
667		959
668	/* calculate blocking time */	960	/* calculate blocking time */
669		961
670	/* we only need this for !monotonic clockor timers, but as we basically	962	/* we only need this for !monotonic clockor timers, but as we basically
671	always have timers, we just calculate it always */	963	always have timers, we just calculate it always */
		964	#if EV_USE_MONOTONIC
		965	if (expect_true (have_monotonic))
		966	time_update_monotonic (EV_A);
		967	else
		968	#endif
		969	{
672	ev_now = ev_time ();	970	rt_now = ev_time ();
		971	mn_now = rt_now;
		972	}
673		973
674	if (flags & EVLOOP_NONBLOCK || idlecnt)	974	if (flags & EVLOOP_NONBLOCK || idlecnt)
675	block = 0.;	975	block = 0.;
676	else	976	else
677	{	977	{
678	block = MAX_BLOCKTIME;	978	block = MAX_BLOCKTIME;
679		979
680	if (timercnt)	980	if (timercnt)
681	{	981	{
682	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	982	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
683	if (block > to) block = to;	983	if (block > to) block = to;
684	}	984	}
685		985
686	if (periodiccnt)	986	if (periodiccnt)
687	{	987	{
688	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	988	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
689	if (block > to) block = to;	989	if (block > to) block = to;
690	}	990	}
691		991
692	if (block < 0.) block = 0.;	992	if (block < 0.) block = 0.;
693	}	993	}
694		994
695	method_poll (block);	995	method_poll (EV_A_ block);
696		996
697	/* update ev_now, do magic */	997	/* update rt_now, do magic */
698	time_update ();	998	time_update (EV_A);
699		999
700	/* queue pending timers and reschedule them */	1000	/* queue pending timers and reschedule them */
701	timers_reify (); /* relative timers called last */	1001	timers_reify (EV_A); /* relative timers called last */
702	periodics_reify (); /* absolute timers called first */	1002	periodics_reify (EV_A); /* absolute timers called first */
703		1003
704	/* queue idle watchers unless io or timers are pending */	1004	/* queue idle watchers unless io or timers are pending */
705	if (!pendingcnt)	1005	if (!pendingcnt)
706	queue_events ((W *)idles, idlecnt, EV_IDLE);	1006	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
707		1007
708	/* queue check watchers, to be executed first */	1008	/* queue check watchers, to be executed first */
709	if (checkcnt)	1009	if (checkcnt)
710	queue_events ((W *)checks, checkcnt, EV_CHECK);	1010	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711		1011
712	call_pending ();	1012	call_pending (EV_A);
713	}	1013	}
714	while (!ev_loop_done);	1014	while (activecnt && !loop_done);
715		1015
716	if (ev_loop_done != 2)	1016	if (loop_done != 2)
717	ev_loop_done = 0;	1017	loop_done = 0;
		1018	}
		1019
		1020	void
		1021	ev_unloop (EV_P_ int how)
		1022	{
		1023	loop_done = how;
718	}	1024	}
719		1025
720	/*****************************************************************************/	1026	/*****************************************************************************/
721		1027
722	static void	1028	inline void
723	wlist_add (WL *head, WL elem)	1029	wlist_add (WL *head, WL elem)
724	{	1030	{
725	elem->next = *head;	1031	elem->next = *head;
726	*head = elem;	1032	*head = elem;
727	}	1033	}
728		1034
729	static void	1035	inline void
730	wlist_del (WL *head, WL elem)	1036	wlist_del (WL *head, WL elem)
731	{	1037	{
732	while (*head)	1038	while (*head)
733	{	1039	{
734	if (*head == elem)	1040	if (*head == elem)
…		…
739		1045
740	head = &(*head)->next;	1046	head = &(*head)->next;
741	}	1047	}
742	}	1048	}
743		1049
744	static void	1050	inline void
745	ev_clear_pending (W w)	1051	ev_clear_pending (EV_P_ W w)
746	{	1052	{
747	if (w->pending)	1053	if (w->pending)
748	{	1054	{
749	pendings [w->pending - 1].w = 0;	1055	pendings [ABSPRI (w)][w->pending - 1].w = 0;
750	w->pending = 0;	1056	w->pending = 0;
751	}	1057	}
752	}	1058	}
753		1059
754	static void	1060	inline void
755	ev_start (W w, int active)	1061	ev_start (EV_P_ W w, int active)
756	{	1062	{
		1063	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1064	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1065
757	w->active = active;	1066	w->active = active;
		1067	ev_ref (EV_A);
758	}	1068	}
759		1069
760	static void	1070	inline void
761	ev_stop (W w)	1071	ev_stop (EV_P_ W w)
762	{	1072	{
		1073	ev_unref (EV_A);
763	w->active = 0;	1074	w->active = 0;
764	}	1075	}
765		1076
766	/*****************************************************************************/	1077	/*****************************************************************************/
767		1078
768	void	1079	void
769	ev_io_start (struct ev_io *w)	1080	ev_io_start (EV_P_ struct ev_io *w)
770	{	1081	{
771	int fd = w->fd;	1082	int fd = w->fd;
772		1083
773	if (ev_is_active (w))	1084	if (ev_is_active (w))
774	return;	1085	return;
775		1086
776	assert (("ev_io_start called with negative fd", fd >= 0));	1087	assert (("ev_io_start called with negative fd", fd >= 0));
777		1088
778	ev_start ((W)w, 1);	1089	ev_start (EV_A_ (W)w, 1);
779	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1090	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
780	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1091	wlist_add ((WL *)&anfds[fd].head, (WL)w);
781		1092
782	fd_change (fd);	1093	fd_change (EV_A_ fd);
783	}	1094	}
784		1095
785	void	1096	void
786	ev_io_stop (struct ev_io *w)	1097	ev_io_stop (EV_P_ struct ev_io *w)
787	{	1098	{
788	ev_clear_pending ((W)w);	1099	ev_clear_pending (EV_A_ (W)w);
789	if (!ev_is_active (w))	1100	if (!ev_is_active (w))
790	return;	1101	return;
791		1102
792	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1103	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
793	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
794		1105
795	fd_change (w->fd);	1106	fd_change (EV_A_ w->fd);
796	}	1107	}
797		1108
798	void	1109	void
799	ev_timer_start (struct ev_timer *w)	1110	ev_timer_start (EV_P_ struct ev_timer *w)
800	{	1111	{
801	if (ev_is_active (w))	1112	if (ev_is_active (w))
802	return;	1113	return;
803		1114
804	w->at += now;	1115	w->at += mn_now;
805		1116
806	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1117	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807		1118
808	ev_start ((W)w, ++timercnt);	1119	ev_start (EV_A_ (W)w, ++timercnt);
809	array_needsize (timers, timermax, timercnt, );	1120	array_needsize (timers, timermax, timercnt, );
810	timers [timercnt - 1] = w;	1121	timers [timercnt - 1] = w;
811	upheap ((WT *)timers, timercnt - 1);	1122	upheap ((WT *)timers, timercnt - 1);
812	}	1123	}
813		1124
814	void	1125	void
815	ev_timer_stop (struct ev_timer *w)	1126	ev_timer_stop (EV_P_ struct ev_timer *w)
816	{	1127	{
817	ev_clear_pending ((W)w);	1128	ev_clear_pending (EV_A_ (W)w);
818	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
819	return;	1130	return;
820		1131
821	if (w->active < timercnt--)	1132	if (w->active < timercnt--)
822	{	1133	{
…		…
824	downheap ((WT *)timers, timercnt, w->active - 1);	1135	downheap ((WT *)timers, timercnt, w->active - 1);
825	}	1136	}
826		1137
827	w->at = w->repeat;	1138	w->at = w->repeat;
828		1139
829	ev_stop ((W)w);	1140	ev_stop (EV_A_ (W)w);
830	}	1141	}
831		1142
832	void	1143	void
833	ev_timer_again (struct ev_timer *w)	1144	ev_timer_again (EV_P_ struct ev_timer *w)
834	{	1145	{
835	if (ev_is_active (w))	1146	if (ev_is_active (w))
836	{	1147	{
837	if (w->repeat)	1148	if (w->repeat)
838	{	1149	{
839	w->at = now + w->repeat;	1150	w->at = mn_now + w->repeat;
840	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, w->active - 1);
841	}	1152	}
842	else	1153	else
843	ev_timer_stop (w);	1154	ev_timer_stop (EV_A_ w);
844	}	1155	}
845	else if (w->repeat)	1156	else if (w->repeat)
846	ev_timer_start (w);	1157	ev_timer_start (EV_A_ w);
847	}	1158	}
848		1159
849	void	1160	void
850	ev_periodic_start (struct ev_periodic *w)	1161	ev_periodic_start (EV_P_ struct ev_periodic *w)
851	{	1162	{
852	if (ev_is_active (w))	1163	if (ev_is_active (w))
853	return;	1164	return;
854		1165
855	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1166	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
856		1167
857	/* this formula differs from the one in periodic_reify because we do not always round up */	1168	/* this formula differs from the one in periodic_reify because we do not always round up */
858	if (w->interval)	1169	if (w->interval)
859	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1170	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
860		1171
861	ev_start ((W)w, ++periodiccnt);	1172	ev_start (EV_A_ (W)w, ++periodiccnt);
862	array_needsize (periodics, periodicmax, periodiccnt, );	1173	array_needsize (periodics, periodicmax, periodiccnt, );
863	periodics [periodiccnt - 1] = w;	1174	periodics [periodiccnt - 1] = w;
864	upheap ((WT *)periodics, periodiccnt - 1);	1175	upheap ((WT *)periodics, periodiccnt - 1);
865	}	1176	}
866		1177
867	void	1178	void
868	ev_periodic_stop (struct ev_periodic *w)	1179	ev_periodic_stop (EV_P_ struct ev_periodic *w)
869	{	1180	{
870	ev_clear_pending ((W)w);	1181	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1182	if (!ev_is_active (w))
872	return;	1183	return;
873		1184
874	if (w->active < periodiccnt--)	1185	if (w->active < periodiccnt--)
875	{	1186	{
876	periodics [w->active - 1] = periodics [periodiccnt];	1187	periodics [w->active - 1] = periodics [periodiccnt];
877	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1188	downheap ((WT *)periodics, periodiccnt, w->active - 1);
878	}	1189	}
879		1190
880	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
881	}	1192	}
882		1193
883	void	1194	void
884	ev_signal_start (struct ev_signal *w)	1195	ev_idle_start (EV_P_ struct ev_idle *w)
885	{	1196	{
886	if (ev_is_active (w))	1197	if (ev_is_active (w))
887	return;	1198	return;
888		1199
		1200	ev_start (EV_A_ (W)w, ++idlecnt);
		1201	array_needsize (idles, idlemax, idlecnt, );
		1202	idles [idlecnt - 1] = w;
		1203	}
		1204
		1205	void
		1206	ev_idle_stop (EV_P_ struct ev_idle *w)
		1207	{
		1208	ev_clear_pending (EV_A_ (W)w);
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	idles [w->active - 1] = idles [--idlecnt];
		1213	ev_stop (EV_A_ (W)w);
		1214	}
		1215
		1216	void
		1217	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1218	{
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	ev_start (EV_A_ (W)w, ++preparecnt);
		1223	array_needsize (prepares, preparemax, preparecnt, );
		1224	prepares [preparecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	prepares [w->active - 1] = prepares [--preparecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_check_start (EV_P_ struct ev_check *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++checkcnt);
		1245	array_needsize (checks, checkmax, checkcnt, );
		1246	checks [checkcnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_check_stop (EV_P_ struct ev_check *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	checks [w->active - 1] = checks [--checkcnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	#ifndef SA_RESTART
		1261	# define SA_RESTART 0
		1262	#endif
		1263
		1264	void
		1265	ev_signal_start (EV_P_ struct ev_signal *w)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1269	#endif
		1270	if (ev_is_active (w))
		1271	return;
		1272
889	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1273	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
890		1274
891	ev_start ((W)w, 1);	1275	ev_start (EV_A_ (W)w, 1);
892	array_needsize (signals, signalmax, w->signum, signals_init);	1276	array_needsize (signals, signalmax, w->signum, signals_init);
893	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1277	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
894		1278
895	if (!w->next)	1279	if (!w->next)
896	{	1280	{
897	struct sigaction sa;	1281	struct sigaction sa;
898	sa.sa_handler = sighandler;	1282	sa.sa_handler = sighandler;
899	sigfillset (&sa.sa_mask);	1283	sigfillset (&sa.sa_mask);
900	sa.sa_flags = 0;	1284	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901	sigaction (w->signum, &sa, 0);	1285	sigaction (w->signum, &sa, 0);
902	}	1286	}
903	}	1287	}
904		1288
905	void	1289	void
906	ev_signal_stop (struct ev_signal *w)	1290	ev_signal_stop (EV_P_ struct ev_signal *w)
907	{	1291	{
908	ev_clear_pending ((W)w);	1292	ev_clear_pending (EV_A_ (W)w);
909	if (!ev_is_active (w))	1293	if (!ev_is_active (w))
910	return;	1294	return;
911		1295
912	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1296	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
913	ev_stop ((W)w);	1297	ev_stop (EV_A_ (W)w);
914		1298
915	if (!signals [w->signum - 1].head)	1299	if (!signals [w->signum - 1].head)
916	signal (w->signum, SIG_DFL);	1300	signal (w->signum, SIG_DFL);
917	}	1301	}
918		1302
919	void	1303	void
920	ev_idle_start (struct ev_idle *w)	1304	ev_child_start (EV_P_ struct ev_child *w)
921	{	1305	{
		1306	#if EV_MULTIPLICITY
		1307	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1308	#endif
922	if (ev_is_active (w))	1309	if (ev_is_active (w))
923	return;	1310	return;
924		1311
925	ev_start ((W)w, ++idlecnt);	1312	ev_start (EV_A_ (W)w, 1);
926	array_needsize (idles, idlemax, idlecnt, );	1313	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
927	idles [idlecnt - 1] = w;
928	}	1314	}
929		1315
930	void	1316	void
931	ev_idle_stop (struct ev_idle *w)	1317	ev_child_stop (EV_P_ struct ev_child *w)
932	{	1318	{
933	ev_clear_pending ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
934	if (ev_is_active (w))	1320	if (ev_is_active (w))
935	return;	1321	return;
936		1322
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);	1323	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1003	ev_stop ((W)w);	1324	ev_stop (EV_A_ (W)w);
1004	}	1325	}
1005		1326
1006	/*****************************************************************************/	1327	/*****************************************************************************/
1007		1328
1008	struct ev_once	1329	struct ev_once
…		…
1012	void (*cb)(int revents, void *arg);	1333	void (*cb)(int revents, void *arg);
1013	void *arg;	1334	void *arg;
1014	};	1335	};
1015		1336
1016	static void	1337	static void
1017	once_cb (struct ev_once *once, int revents)	1338	once_cb (EV_P_ struct ev_once *once, int revents)
1018	{	1339	{
1019	void (*cb)(int revents, void *arg) = once->cb;	1340	void (*cb)(int revents, void *arg) = once->cb;
1020	void *arg = once->arg;	1341	void *arg = once->arg;
1021		1342
1022	ev_io_stop (&once->io);	1343	ev_io_stop (EV_A_ &once->io);
1023	ev_timer_stop (&once->to);	1344	ev_timer_stop (EV_A_ &once->to);
1024	free (once);	1345	free (once);
1025		1346
1026	cb (revents, arg);	1347	cb (revents, arg);
1027	}	1348	}
1028		1349
1029	static void	1350	static void
1030	once_cb_io (struct ev_io *w, int revents)	1351	once_cb_io (EV_P_ struct ev_io *w, int revents)
1031	{	1352	{
1032	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1353	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1033	}	1354	}
1034		1355
1035	static void	1356	static void
1036	once_cb_to (struct ev_timer *w, int revents)	1357	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1037	{	1358	{
1038	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1359	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1039	}	1360	}
1040		1361
1041	void	1362	void
1042	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1363	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1043	{	1364	{
1044	struct ev_once *once = malloc (sizeof (struct ev_once));	1365	struct ev_once *once = malloc (sizeof (struct ev_once));
1045		1366
1046	if (!once)	1367	if (!once)
1047	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1368	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1052		1373
1053	ev_watcher_init (&once->io, once_cb_io);	1374	ev_watcher_init (&once->io, once_cb_io);
1054	if (fd >= 0)	1375	if (fd >= 0)
1055	{	1376	{
1056	ev_io_set (&once->io, fd, events);	1377	ev_io_set (&once->io, fd, events);
1057	ev_io_start (&once->io);	1378	ev_io_start (EV_A_ &once->io);
1058	}	1379	}
1059		1380
1060	ev_watcher_init (&once->to, once_cb_to);	1381	ev_watcher_init (&once->to, once_cb_to);
1061	if (timeout >= 0.)	1382	if (timeout >= 0.)
1062	{	1383	{
1063	ev_timer_set (&once->to, timeout, 0.);	1384	ev_timer_set (&once->to, timeout, 0.);
1064	ev_timer_start (&once->to);	1385	ev_timer_start (EV_A_ &once->to);
1065	}	1386	}
1066	}	1387	}
1067	}	1388	}
1068		1389
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
1151

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