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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 1.70 by root, Tue Nov 6 00:52:32 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_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
65	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
67	#endif	119	#endif
68	#ifndef EV_USE_REALTIME	120
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
70	#endif
71		122
72	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#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) */	124	#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 */	125	#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 */	126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
76		127
77	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
78		143
79	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
82		147
83	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
84	ev_tstamp ev_now;
85	int ev_method;
86		149
87	static int have_monotonic; /* runtime */	150	#if WIN32
88		151	/* note: the comment below could not be substantiated, but what would I care */
89	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
90	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
91	static void (*method_poll)(ev_tstamp timeout);	154	#endif
92		155
93	/*****************************************************************************/	156	/*****************************************************************************/
94		157
95	ev_tstamp	158	static void (*syserr_cb)(const char *msg);
		159
		160	void ev_set_syserr_cb (void (*cb)(const char *msg))
		161	{
		162	syserr_cb = cb;
		163	}
		164
		165	static void
		166	syserr (const char *msg)
		167	{
		168	if (!msg)
		169	msg = "(libev) system error";
		170
		171	if (syserr_cb)
		172	syserr_cb (msg);
		173	else
		174	{
		175	perror (msg);
		176	abort ();
		177	}
		178	}
		179
		180	static void *(*alloc)(void *ptr, long size);
		181
		182	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		183	{
		184	alloc = cb;
		185	}
		186
		187	static void *
		188	ev_realloc (void *ptr, long size)
		189	{
		190	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		191
		192	if (!ptr && size)
		193	{
		194	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		195	abort ();
		196	}
		197
		198	return ptr;
		199	}
		200
		201	#define ev_malloc(size) ev_realloc (0, (size))
		202	#define ev_free(ptr) ev_realloc ((ptr), 0)
		203
		204	/*****************************************************************************/
		205
		206	typedef struct
		207	{
		208	WL head;
		209	unsigned char events;
		210	unsigned char reify;
		211	} ANFD;
		212
		213	typedef struct
		214	{
		215	W w;
		216	int events;
		217	} ANPENDING;
		218
		219	#if EV_MULTIPLICITY
		220
		221	struct ev_loop
		222	{
		223	# define VAR(name,decl) decl;
		224	# include "ev_vars.h"
		225	};
		226	# undef VAR
		227	# include "ev_wrap.h"
		228
		229	#else
		230
		231	# define VAR(name,decl) static decl;
		232	# include "ev_vars.h"
		233	# undef VAR
		234
		235	#endif
		236
		237	/*****************************************************************************/
		238
		239	inline ev_tstamp
96	ev_time (void)	240	ev_time (void)
97	{	241	{
98	#if EV_USE_REALTIME	242	#if EV_USE_REALTIME
99	struct timespec ts;	243	struct timespec ts;
100	clock_gettime (CLOCK_REALTIME, &ts);	244	clock_gettime (CLOCK_REALTIME, &ts);
…		…
104	gettimeofday (&tv, 0);	248	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	249	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	250	#endif
107	}	251	}
108		252
109	static ev_tstamp	253	inline ev_tstamp
110	get_clock (void)	254	get_clock (void)
111	{	255	{
112	#if EV_USE_MONOTONIC	256	#if EV_USE_MONOTONIC
113	if (have_monotonic)	257	if (expect_true (have_monotonic))
114	{	258	{
115	struct timespec ts;	259	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	260	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	261	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	262	}
119	#endif	263	#endif
120		264
121	return ev_time ();	265	return ev_time ();
122	}	266	}
123		267
		268	ev_tstamp
		269	ev_now (EV_P)
		270	{
		271	return rt_now;
		272	}
		273
124	#define array_roundsize(base,n) ((n) | 4 & ~3)	274	#define array_roundsize(base,n) ((n) | 4 & ~3)
125		275
126	#define array_needsize(base,cur,cnt,init) \	276	#define array_needsize(base,cur,cnt,init) \
127	if ((cnt) > cur) \	277	if (expect_false ((cnt) > cur)) \
128	{ \	278	{ \
129	int newcnt = cur; \	279	int newcnt = cur; \
130	do \	280	do \
131	{ \	281	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	282	newcnt = array_roundsize (base, newcnt << 1); \
133	} \	283	} \
134	while ((cnt) > newcnt); \	284	while ((cnt) > newcnt); \
135	\	285	\
136	base = realloc (base, sizeof (*base) * (newcnt)); \	286	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
137	init (base + cur, newcnt - cur); \	287	init (base + cur, newcnt - cur); \
138	cur = newcnt; \	288	cur = newcnt; \
139	}	289	}
		290
		291	#define array_slim(stem) \
		292	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		293	{ \
		294	stem ## max = array_roundsize (stem ## cnt >> 1); \
		295	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \
		296	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		297	}
		298
		299	#define array_free(stem, idx) \
		300	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
140		301
141	/*****************************************************************************/	302	/*****************************************************************************/
142
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		303
153	static void	304	static void
154	anfds_init (ANFD *base, int count)	305	anfds_init (ANFD *base, int count)
155	{	306	{
156	while (count--)	307	while (count--)
…		…
161		312
162	++base;	313	++base;
163	}	314	}
164	}	315	}
165		316
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	317	static void
176	event (W w, int events)	318	event (EV_P_ W w, int events)
177	{	319	{
178	if (w->pending)	320	if (w->pending)
179	{	321	{
180	pendings [w->pending - 1].events |= events;	322	pendings [ABSPRI (w)][w->pending - 1].events |= events;
181	return;	323	return;
182	}	324	}
183		325
184	w->pending = ++pendingcnt;	326	w->pending = ++pendingcnt [ABSPRI (w)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	327	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
186	pendings [pendingcnt - 1].w = w;	328	pendings [ABSPRI (w)][w->pending - 1].w = w;
187	pendings [pendingcnt - 1].events = events;	329	pendings [ABSPRI (w)][w->pending - 1].events = events;
188	}	330	}
189		331
190	static void	332	static void
191	queue_events (W *events, int eventcnt, int type)	333	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	334	{
193	int i;	335	int i;
194		336
195	for (i = 0; i < eventcnt; ++i)	337	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	338	event (EV_A_ events [i], type);
197	}	339	}
198		340
199	static void	341	static void
200	fd_event (int fd, int events)	342	fd_event (EV_P_ int fd, int events)
201	{	343	{
202	ANFD *anfd = anfds + fd;	344	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	345	struct ev_io *w;
204		346
205	for (w = anfd->head; w; w = w->next)	347	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
206	{	348	{
207	int ev = w->events & events;	349	int ev = w->events & events;
208		350
209	if (ev)	351	if (ev)
210	event ((W)w, ev);	352	event (EV_A_ (W)w, ev);
211	}	353	}
212	}	354	}
213		355
214	/*****************************************************************************/	356	/*****************************************************************************/
215		357
216	static int *fdchanges;
217	static int fdchangemax, fdchangecnt;
218
219	static void	358	static void
220	fd_reify (void)	359	fd_reify (EV_P)
221	{	360	{
222	int i;	361	int i;
223		362
224	for (i = 0; i < fdchangecnt; ++i)	363	for (i = 0; i < fdchangecnt; ++i)
225	{	364	{
…		…
227	ANFD *anfd = anfds + fd;	366	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	367	struct ev_io *w;
229		368
230	int events = 0;	369	int events = 0;
231		370
232	for (w = anfd->head; w; w = w->next)	371	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
233	events |= w->events;	372	events |= w->events;
234		373
235	anfd->reify = 0;	374	anfd->reify = 0;
236		375
237	if (anfd->events != events)
238	{
239	method_modify (fd, anfd->events, events);	376	method_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	377	anfd->events = events;
241	}
242	}	378	}
243		379
244	fdchangecnt = 0;	380	fdchangecnt = 0;
245	}	381	}
246		382
247	static void	383	static void
248	fd_change (int fd)	384	fd_change (EV_P_ int fd)
249	{	385	{
250	if (anfds [fd].reify || fdchangecnt < 0)	386	if (anfds [fd].reify)
251	return;	387	return;
252		388
253	anfds [fd].reify = 1;	389	anfds [fd].reify = 1;
254		390
255	++fdchangecnt;	391	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	392	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
257	fdchanges [fdchangecnt - 1] = fd;	393	fdchanges [fdchangecnt - 1] = fd;
258	}	394	}
259		395
		396	static void
		397	fd_kill (EV_P_ int fd)
		398	{
		399	struct ev_io *w;
		400
		401	while ((w = (struct ev_io *)anfds [fd].head))
		402	{
		403	ev_io_stop (EV_A_ w);
		404	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		405	}
		406	}
		407
260	/* called on EBADF to verify fds */	408	/* called on EBADF to verify fds */
261	static void	409	static void
262	fd_recheck (void)	410	fd_ebadf (EV_P)
263	{	411	{
264	int fd;	412	int fd;
265		413
266	for (fd = 0; fd < anfdmax; ++fd)	414	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	415	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	416	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
269	while (anfds [fd].head)	417	fd_kill (EV_A_ fd);
		418	}
		419
		420	/* called on ENOMEM in select/poll to kill some fds and retry */
		421	static void
		422	fd_enomem (EV_P)
		423	{
		424	int fd;
		425
		426	for (fd = anfdmax; fd--; )
		427	if (anfds [fd].events)
270	{	428	{
271	ev_io_stop (anfds [fd].head);	429	fd_kill (EV_A_ fd);
272	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	430	return;
273	}	431	}
		432	}
		433
		434	/* usually called after fork if method needs to re-arm all fds from scratch */
		435	static void
		436	fd_rearm_all (EV_P)
		437	{
		438	int fd;
		439
		440	/* this should be highly optimised to not do anything but set a flag */
		441	for (fd = 0; fd < anfdmax; ++fd)
		442	if (anfds [fd].events)
		443	{
		444	anfds [fd].events = 0;
		445	fd_change (EV_A_ fd);
		446	}
274	}	447	}
275		448
276	/*****************************************************************************/	449	/*****************************************************************************/
277		450
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	451	static void
285	upheap (WT *timers, int k)	452	upheap (WT *heap, int k)
286	{	453	{
287	WT w = timers [k];	454	WT w = heap [k];
288		455
289	while (k && timers [k >> 1]->at > w->at)	456	while (k && heap [k >> 1]->at > w->at)
290	{	457	{
291	timers [k] = timers [k >> 1];	458	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	459	((W)heap [k])->active = k + 1;
293	k >>= 1;	460	k >>= 1;
294	}	461	}
295		462
296	timers [k] = w;	463	heap [k] = w;
297	timers [k]->active = k + 1;	464	((W)heap [k])->active = k + 1;
298		465
299	}	466	}
300		467
301	static void	468	static void
302	downheap (WT *timers, int N, int k)	469	downheap (WT *heap, int N, int k)
303	{	470	{
304	WT w = timers [k];	471	WT w = heap [k];
305		472
306	while (k < (N >> 1))	473	while (k < (N >> 1))
307	{	474	{
308	int j = k << 1;	475	int j = k << 1;
309		476
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	477	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	478	++j;
312		479
313	if (w->at <= timers [j]->at)	480	if (w->at <= heap [j]->at)
314	break;	481	break;
315		482
316	timers [k] = timers [j];	483	heap [k] = heap [j];
317	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
318	k = j;	485	k = j;
319	}	486	}
320		487
321	timers [k] = w;	488	heap [k] = w;
322	timers [k]->active = k + 1;	489	((W)heap [k])->active = k + 1;
323	}	490	}
324		491
325	/*****************************************************************************/	492	/*****************************************************************************/
326		493
327	typedef struct	494	typedef struct
328	{	495	{
329	struct ev_signal *head;	496	WL head;
330	sig_atomic_t volatile gotsig;	497	sig_atomic_t volatile gotsig;
331	} ANSIG;	498	} ANSIG;
332		499
333	static ANSIG *signals;	500	static ANSIG *signals;
334	static int signalmax;	501	static int signalmax;
…		…
350	}	517	}
351		518
352	static void	519	static void
353	sighandler (int signum)	520	sighandler (int signum)
354	{	521	{
		522	#if WIN32
		523	signal (signum, sighandler);
		524	#endif
		525
355	signals [signum - 1].gotsig = 1;	526	signals [signum - 1].gotsig = 1;
356		527
357	if (!gotsig)	528	if (!gotsig)
358	{	529	{
		530	int old_errno = errno;
359	gotsig = 1;	531	gotsig = 1;
360	write (sigpipe [1], &signum, 1);	532	write (sigpipe [1], &signum, 1);
		533	errno = old_errno;
361	}	534	}
362	}	535	}
363		536
364	static void	537	static void
365	sigcb (struct ev_io *iow, int revents)	538	sigcb (EV_P_ struct ev_io *iow, int revents)
366	{	539	{
367	struct ev_signal *w;	540	WL w;
368	int sig;	541	int signum;
369		542
370	read (sigpipe [0], &revents, 1);	543	read (sigpipe [0], &revents, 1);
371	gotsig = 0;	544	gotsig = 0;
372		545
373	for (sig = signalmax; sig--; )	546	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	547	if (signals [signum].gotsig)
375	{	548	{
376	signals [sig].gotsig = 0;	549	signals [signum].gotsig = 0;
377		550
378	for (w = signals [sig].head; w; w = w->next)	551	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	552	event (EV_A_ (W)w, EV_SIGNAL);
380	}	553	}
381	}	554	}
382		555
383	static void	556	static void
384	siginit (void)	557	siginit (EV_P)
385	{	558	{
		559	#ifndef WIN32
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	560	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	561	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388		562
389	/* rather than sort out wether we really need nb, set it */	563	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	564	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	565	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		566	#endif
392		567
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	568	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	569	ev_io_start (EV_A_ &sigev);
		570	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	571	}
396		572
397	/*****************************************************************************/	573	/*****************************************************************************/
398		574
399	static struct ev_idle **idles;	575	#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		576
410	static struct ev_child *childs [PID_HASHSIZE];	577	static struct ev_child *childs [PID_HASHSIZE];
411	static struct ev_signal childev;	578	static struct ev_signal childev;
412		579
413	#ifndef WCONTINUED	580	#ifndef WCONTINUED
414	# define WCONTINUED 0	581	# define WCONTINUED 0
415	#endif	582	#endif
416		583
417	static void	584	static void
418	childcb (struct ev_signal *sw, int revents)	585	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
419	{	586	{
420	struct ev_child *w;	587	struct ev_child *w;
		588
		589	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		590	if (w->pid == pid || !w->pid)
		591	{
		592	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		593	w->rpid = pid;
		594	w->rstatus = status;
		595	event (EV_A_ (W)w, EV_CHILD);
		596	}
		597	}
		598
		599	static void
		600	childcb (EV_P_ struct ev_signal *sw, int revents)
		601	{
421	int pid, status;	602	int pid, status;
422		603
423	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	604	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	605	{
425	if (w->pid == pid || w->pid == -1)	606	/* make sure we are called again until all childs have been reaped */
426	{	607	event (EV_A_ (W)sw, EV_SIGNAL);
427	w->status = status;	608
428	event ((W)w, EV_CHILD);	609	child_reap (EV_A_ sw, pid, pid, status);
429	}	610	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		611	}
430	}	612	}
		613
		614	#endif
431		615
432	/*****************************************************************************/	616	/*****************************************************************************/
433		617
		618	#if EV_USE_KQUEUE
		619	# include "ev_kqueue.c"
		620	#endif
434	#if EV_USE_EPOLL	621	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	622	# include "ev_epoll.c"
436	#endif	623	#endif
		624	#if EV_USE_POLL
		625	# include "ev_poll.c"
		626	#endif
437	#if EV_USE_SELECT	627	#if EV_USE_SELECT
438	# include "ev_select.c"	628	# include "ev_select.c"
439	#endif	629	#endif
440		630
441	int	631	int
…		…
448	ev_version_minor (void)	638	ev_version_minor (void)
449	{	639	{
450	return EV_VERSION_MINOR;	640	return EV_VERSION_MINOR;
451	}	641	}
452		642
453	int ev_init (int flags)	643	/* return true if we are running with elevated privileges and should ignore env variables */
		644	static int
		645	enable_secure (void)
454	{	646	{
		647	#ifdef WIN32
		648	return 0;
		649	#else
		650	return getuid () != geteuid ()
		651	|| getgid () != getegid ();
		652	#endif
		653	}
		654
		655	int
		656	ev_method (EV_P)
		657	{
		658	return method;
		659	}
		660
		661	static void
		662	loop_init (EV_P_ int methods)
		663	{
455	if (!ev_method)	664	if (!method)
456	{	665	{
457	#if EV_USE_MONOTONIC	666	#if EV_USE_MONOTONIC
458	{	667	{
459	struct timespec ts;	668	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	669	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	670	have_monotonic = 1;
462	}	671	}
463	#endif	672	#endif
464		673
465	ev_now = ev_time ();	674	rt_now = ev_time ();
466	now = get_clock ();	675	mn_now = get_clock ();
		676	now_floor = mn_now;
467	diff = ev_now - now;	677	rtmn_diff = rt_now - mn_now;
468		678
469	if (pipe (sigpipe))	679	if (methods == EVMETHOD_AUTO)
470	return 0;	680	if (!enable_secure () && getenv ("LIBEV_METHODS"))
471		681	methods = atoi (getenv ("LIBEV_METHODS"));
		682	else
472	ev_method = EVMETHOD_NONE;	683	methods = EVMETHOD_ANY;
		684
		685	method = 0;
		686	#if EV_USE_WIN32
		687	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		688	#endif
		689	#if EV_USE_KQUEUE
		690	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		691	#endif
473	#if EV_USE_EPOLL	692	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	693	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		694	#endif
		695	#if EV_USE_POLL
		696	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
475	#endif	697	#endif
476	#if EV_USE_SELECT	698	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	699	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
478	#endif	700	#endif
479		701
		702	ev_watcher_init (&sigev, sigcb);
		703	ev_set_priority (&sigev, EV_MAXPRI);
		704	}
		705	}
		706
		707	void
		708	loop_destroy (EV_P)
		709	{
		710	int i;
		711
		712	#if EV_USE_WIN32
		713	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		714	#endif
		715	#if EV_USE_KQUEUE
		716	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		717	#endif
		718	#if EV_USE_EPOLL
		719	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		720	#endif
		721	#if EV_USE_POLL
		722	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		723	#endif
		724	#if EV_USE_SELECT
		725	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		726	#endif
		727
		728	for (i = NUMPRI; i--; )
		729	array_free (pending, [i]);
		730
		731	array_free (fdchange, );
		732	array_free (timer, );
		733	array_free (periodic, );
		734	array_free (idle, );
		735	array_free (prepare, );
		736	array_free (check, );
		737
		738	method = 0;
		739	}
		740
		741	static void
		742	loop_fork (EV_P)
		743	{
		744	#if EV_USE_EPOLL
		745	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		746	#endif
		747	#if EV_USE_KQUEUE
		748	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		749	#endif
		750
		751	if (ev_is_active (&sigev))
		752	{
		753	/* default loop */
		754
		755	ev_ref (EV_A);
		756	ev_io_stop (EV_A_ &sigev);
		757	close (sigpipe [0]);
		758	close (sigpipe [1]);
		759
		760	while (pipe (sigpipe))
		761	syserr ("(libev) error creating pipe");
		762
		763	siginit (EV_A);
		764	}
		765
		766	postfork = 0;
		767	}
		768
		769	#if EV_MULTIPLICITY
		770	struct ev_loop *
		771	ev_loop_new (int methods)
		772	{
		773	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		774
		775	memset (loop, 0, sizeof (struct ev_loop));
		776
		777	loop_init (EV_A_ methods);
		778
		779	if (ev_method (EV_A))
		780	return loop;
		781
		782	return 0;
		783	}
		784
		785	void
		786	ev_loop_destroy (EV_P)
		787	{
		788	loop_destroy (EV_A);
		789	ev_free (loop);
		790	}
		791
		792	void
		793	ev_loop_fork (EV_P)
		794	{
		795	postfork = 1;
		796	}
		797
		798	#endif
		799
		800	#if EV_MULTIPLICITY
		801	struct ev_loop default_loop_struct;
		802	static struct ev_loop *default_loop;
		803
		804	struct ev_loop *
		805	#else
		806	static int default_loop;
		807
		808	int
		809	#endif
		810	ev_default_loop (int methods)
		811	{
		812	if (sigpipe [0] == sigpipe [1])
		813	if (pipe (sigpipe))
		814	return 0;
		815
		816	if (!default_loop)
		817	{
		818	#if EV_MULTIPLICITY
		819	struct ev_loop *loop = default_loop = &default_loop_struct;
		820	#else
		821	default_loop = 1;
		822	#endif
		823
		824	loop_init (EV_A_ methods);
		825
480	if (ev_method)	826	if (ev_method (EV_A))
481	{	827	{
482	ev_watcher_init (&sigev, sigcb);
483	siginit ();	828	siginit (EV_A);
484		829
		830	#ifndef WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	831	ev_signal_init (&childev, childcb, SIGCHLD);
		832	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	833	ev_signal_start (EV_A_ &childev);
		834	ev_unref (EV_A); /* child watcher should not keep loop alive */
		835	#endif
487	}	836	}
		837	else
		838	default_loop = 0;
488	}	839	}
489		840
490	return ev_method;	841	return default_loop;
		842	}
		843
		844	void
		845	ev_default_destroy (void)
		846	{
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *loop = default_loop;
		849	#endif
		850
		851	ev_ref (EV_A); /* child watcher */
		852	ev_signal_stop (EV_A_ &childev);
		853
		854	ev_ref (EV_A); /* signal watcher */
		855	ev_io_stop (EV_A_ &sigev);
		856
		857	close (sigpipe [0]); sigpipe [0] = 0;
		858	close (sigpipe [1]); sigpipe [1] = 0;
		859
		860	loop_destroy (EV_A);
		861	}
		862
		863	void
		864	ev_default_fork (void)
		865	{
		866	#if EV_MULTIPLICITY
		867	struct ev_loop *loop = default_loop;
		868	#endif
		869
		870	if (method)
		871	postfork = 1;
491	}	872	}
492		873
493	/*****************************************************************************/	874	/*****************************************************************************/
494		875
495	void
496	ev_fork_prepare (void)
497	{
498	/* nop */
499	}
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
514
515	ev_io_stop (&sigev);
516	close (sigpipe [0]);
517	close (sigpipe [1]);
518	pipe (sigpipe);
519	siginit ();
520	}
521
522	/*****************************************************************************/
523
524	static void	876	static void
525	call_pending (void)	877	call_pending (EV_P)
526	{	878	{
		879	int pri;
		880
		881	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	882	while (pendingcnt [pri])
528	{	883	{
529	ANPENDING *p = pendings + --pendingcnt;	884	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		885
531	if (p->w)	886	if (p->w)
532	{	887	{
533	p->w->pending = 0;	888	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	889	p->w->cb (EV_A_ p->w, p->events);
535	}	890	}
536	}	891	}
537	}	892	}
538		893
539	static void	894	static void
540	timers_reify (void)	895	timers_reify (EV_P)
541	{	896	{
542	while (timercnt && timers [0]->at <= now)	897	while (timercnt && ((WT)timers [0])->at <= mn_now)
543	{	898	{
544	struct ev_timer *w = timers [0];	899	struct ev_timer *w = timers [0];
		900
		901	assert (("inactive timer on timer heap detected", ev_is_active (w)));
545		902
546	/* first reschedule or stop timer */	903	/* first reschedule or stop timer */
547	if (w->repeat)	904	if (w->repeat)
548	{	905	{
549	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	906	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
550	w->at = now + w->repeat;	907	((WT)w)->at = mn_now + w->repeat;
551	downheap ((WT *)timers, timercnt, 0);	908	downheap ((WT *)timers, timercnt, 0);
552	}	909	}
553	else	910	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	911	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		912
556	event ((W)w, EV_TIMEOUT);	913	event (EV_A_ (W)w, EV_TIMEOUT);
557	}	914	}
558	}	915	}
559		916
560	static void	917	static void
561	periodics_reify (void)	918	periodics_reify (EV_P)
562	{	919	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	920	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
564	{	921	{
565	struct ev_periodic *w = periodics [0];	922	struct ev_periodic *w = periodics [0];
		923
		924	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
566		925
567	/* first reschedule or stop timer */	926	/* first reschedule or stop timer */
568	if (w->interval)	927	if (w->interval)
569	{	928	{
570	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	929	((WT)w)->at += floor ((rt_now - ((WT)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));	930	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
572	downheap ((WT *)periodics, periodiccnt, 0);	931	downheap ((WT *)periodics, periodiccnt, 0);
573	}	932	}
574	else	933	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	934	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		935
577	event ((W)w, EV_PERIODIC);	936	event (EV_A_ (W)w, EV_PERIODIC);
578	}	937	}
579	}	938	}
580		939
581	static void	940	static void
582	periodics_reschedule (ev_tstamp diff)	941	periodics_reschedule (EV_P)
583	{	942	{
584	int i;	943	int i;
585		944
586	/* adjust periodics after time jump */	945	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	946	for (i = 0; i < periodiccnt; ++i)
588	{	947	{
589	struct ev_periodic *w = periodics [i];	948	struct ev_periodic *w = periodics [i];
590		949
591	if (w->interval)	950	if (w->interval)
592	{	951	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	952	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
594		953
595	if (fabs (diff) >= 1e-4)	954	if (fabs (diff) >= 1e-4)
596	{	955	{
597	ev_periodic_stop (w);	956	ev_periodic_stop (EV_A_ w);
598	ev_periodic_start (w);	957	ev_periodic_start (EV_A_ w);
599		958
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	959	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	960	}
602	}	961	}
603	}	962	}
604	}	963	}
605		964
		965	inline int
		966	time_update_monotonic (EV_P)
		967	{
		968	mn_now = get_clock ();
		969
		970	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		971	{
		972	rt_now = rtmn_diff + mn_now;
		973	return 0;
		974	}
		975	else
		976	{
		977	now_floor = mn_now;
		978	rt_now = ev_time ();
		979	return 1;
		980	}
		981	}
		982
606	static void	983	static void
607	time_update (void)	984	time_update (EV_P)
608	{	985	{
609	int i;	986	int i;
610		987
611	ev_now = ev_time ();	988	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	989	if (expect_true (have_monotonic))
614	{	990	{
615	ev_tstamp odiff = diff;	991	if (time_update_monotonic (EV_A))
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	992	{
619	now = get_clock ();	993	ev_tstamp odiff = rtmn_diff;
		994
		995	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		996	{
620	diff = ev_now - now;	997	rtmn_diff = rt_now - mn_now;
621		998
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	999	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	1000	return; /* all is well */
624		1001
625	ev_now = ev_time ();	1002	rt_now = ev_time ();
		1003	mn_now = get_clock ();
		1004	now_floor = mn_now;
		1005	}
		1006
		1007	periodics_reschedule (EV_A);
		1008	/* no timer adjustment, as the monotonic clock doesn't jump */
		1009	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
626	}	1010	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}	1011	}
631	else	1012	else
		1013	#endif
632	{	1014	{
633	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1015	rt_now = ev_time ();
		1016
		1017	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
634	{	1018	{
635	periodics_reschedule (ev_now - now);	1019	periodics_reschedule (EV_A);
636		1020
637	/* adjust timers. this is easy, as the offset is the same for all */	1021	/* adjust timers. this is easy, as the offset is the same for all */
638	for (i = 0; i < timercnt; ++i)	1022	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	1023	((WT)timers [i])->at += rt_now - mn_now;
640	}	1024	}
641		1025
642	now = ev_now;	1026	mn_now = rt_now;
643	}	1027	}
644	}	1028	}
645		1029
646	int ev_loop_done;	1030	void
		1031	ev_ref (EV_P)
		1032	{
		1033	++activecnt;
		1034	}
647		1035
		1036	void
		1037	ev_unref (EV_P)
		1038	{
		1039	--activecnt;
		1040	}
		1041
		1042	static int loop_done;
		1043
		1044	void
648	void ev_loop (int flags)	1045	ev_loop (EV_P_ int flags)
649	{	1046	{
650	double block;	1047	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1048	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
652		1049
653	do	1050	do
654	{	1051	{
655	/* queue check watchers (and execute them) */	1052	/* queue check watchers (and execute them) */
656	if (preparecnt)	1053	if (expect_false (preparecnt))
657	{	1054	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1055	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	1056	call_pending (EV_A);
660	}	1057	}
661		1058
		1059	/* we might have forked, so reify kernel state if necessary */
		1060	if (expect_false (postfork))
		1061	loop_fork (EV_A);
		1062
662	/* update fd-related kernel structures */	1063	/* update fd-related kernel structures */
663	fd_reify ();	1064	fd_reify (EV_A);
664		1065
665	/* calculate blocking time */	1066	/* calculate blocking time */
666		1067
667	/* we only need this for !monotonic clockor timers, but as we basically	1068	/* we only need this for !monotonic clockor timers, but as we basically
668	always have timers, we just calculate it always */	1069	always have timers, we just calculate it always */
		1070	#if EV_USE_MONOTONIC
		1071	if (expect_true (have_monotonic))
		1072	time_update_monotonic (EV_A);
		1073	else
		1074	#endif
		1075	{
669	ev_now = ev_time ();	1076	rt_now = ev_time ();
		1077	mn_now = rt_now;
		1078	}
670		1079
671	if (flags & EVLOOP_NONBLOCK || idlecnt)	1080	if (flags & EVLOOP_NONBLOCK || idlecnt)
672	block = 0.;	1081	block = 0.;
673	else	1082	else
674	{	1083	{
675	block = MAX_BLOCKTIME;	1084	block = MAX_BLOCKTIME;
676		1085
677	if (timercnt)	1086	if (timercnt)
678	{	1087	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1088	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
680	if (block > to) block = to;	1089	if (block > to) block = to;
681	}	1090	}
682		1091
683	if (periodiccnt)	1092	if (periodiccnt)
684	{	1093	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1094	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
686	if (block > to) block = to;	1095	if (block > to) block = to;
687	}	1096	}
688		1097
689	if (block < 0.) block = 0.;	1098	if (block < 0.) block = 0.;
690	}	1099	}
691		1100
692	method_poll (block);	1101	method_poll (EV_A_ block);
693		1102
694	/* update ev_now, do magic */	1103	/* update rt_now, do magic */
695	time_update ();	1104	time_update (EV_A);
696		1105
697	/* queue pending timers and reschedule them */	1106	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	1107	timers_reify (EV_A); /* relative timers called last */
699	periodics_reify (); /* absolute timers called first */	1108	periodics_reify (EV_A); /* absolute timers called first */
700		1109
701	/* queue idle watchers unless io or timers are pending */	1110	/* queue idle watchers unless io or timers are pending */
702	if (!pendingcnt)	1111	if (!pendingcnt)
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	1112	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		1113
705	/* queue check watchers, to be executed first */	1114	/* queue check watchers, to be executed first */
706	if (checkcnt)	1115	if (checkcnt)
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	1116	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		1117
709	call_pending ();	1118	call_pending (EV_A);
710	}	1119	}
711	while (!ev_loop_done);	1120	while (activecnt && !loop_done);
712		1121
713	if (ev_loop_done != 2)	1122	if (loop_done != 2)
714	ev_loop_done = 0;	1123	loop_done = 0;
		1124	}
		1125
		1126	void
		1127	ev_unloop (EV_P_ int how)
		1128	{
		1129	loop_done = how;
715	}	1130	}
716		1131
717	/*****************************************************************************/	1132	/*****************************************************************************/
718		1133
719	static void	1134	inline void
720	wlist_add (WL *head, WL elem)	1135	wlist_add (WL *head, WL elem)
721	{	1136	{
722	elem->next = *head;	1137	elem->next = *head;
723	*head = elem;	1138	*head = elem;
724	}	1139	}
725		1140
726	static void	1141	inline void
727	wlist_del (WL *head, WL elem)	1142	wlist_del (WL *head, WL elem)
728	{	1143	{
729	while (*head)	1144	while (*head)
730	{	1145	{
731	if (*head == elem)	1146	if (*head == elem)
…		…
736		1151
737	head = &(*head)->next;	1152	head = &(*head)->next;
738	}	1153	}
739	}	1154	}
740		1155
741	static void	1156	inline void
742	ev_clear_pending (W w)	1157	ev_clear_pending (EV_P_ W w)
743	{	1158	{
744	if (w->pending)	1159	if (w->pending)
745	{	1160	{
746	pendings [w->pending - 1].w = 0;	1161	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1162	w->pending = 0;
748	}	1163	}
749	}	1164	}
750		1165
751	static void	1166	inline void
752	ev_start (W w, int active)	1167	ev_start (EV_P_ W w, int active)
753	{	1168	{
		1169	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1170	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1171
754	w->active = active;	1172	w->active = active;
		1173	ev_ref (EV_A);
755	}	1174	}
756		1175
757	static void	1176	inline void
758	ev_stop (W w)	1177	ev_stop (EV_P_ W w)
759	{	1178	{
		1179	ev_unref (EV_A);
760	w->active = 0;	1180	w->active = 0;
761	}	1181	}
762		1182
763	/*****************************************************************************/	1183	/*****************************************************************************/
764		1184
765	void	1185	void
766	ev_io_start (struct ev_io *w)	1186	ev_io_start (EV_P_ struct ev_io *w)
767	{	1187	{
		1188	int fd = w->fd;
		1189
768	if (ev_is_active (w))	1190	if (ev_is_active (w))
769	return;	1191	return;
770		1192
771	int fd = w->fd;
772
773	assert (("ev_io_start called with negative fd", fd >= 0));	1193	assert (("ev_io_start called with negative fd", fd >= 0));
774		1194
775	ev_start ((W)w, 1);	1195	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1196	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1197	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1198
779	fd_change (fd);	1199	fd_change (EV_A_ fd);
780	}	1200	}
781		1201
782	void	1202	void
783	ev_io_stop (struct ev_io *w)	1203	ev_io_stop (EV_P_ struct ev_io *w)
784	{	1204	{
785	ev_clear_pending ((W)w);	1205	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1206	if (!ev_is_active (w))
787	return;	1207	return;
788		1208
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1209	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1210	ev_stop (EV_A_ (W)w);
791		1211
792	fd_change (w->fd);	1212	fd_change (EV_A_ w->fd);
793	}	1213	}
794		1214
795	void	1215	void
796	ev_timer_start (struct ev_timer *w)	1216	ev_timer_start (EV_P_ struct ev_timer *w)
797	{	1217	{
798	if (ev_is_active (w))	1218	if (ev_is_active (w))
799	return;	1219	return;
800		1220
801	w->at += now;	1221	((WT)w)->at += mn_now;
802		1222
803	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1223	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
804		1224
805	ev_start ((W)w, ++timercnt);	1225	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1226	array_needsize (timers, timermax, timercnt, );
807	timers [timercnt - 1] = w;	1227	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1228	upheap ((WT *)timers, timercnt - 1);
809	}
810		1229
		1230	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1231	}
		1232
811	void	1233	void
812	ev_timer_stop (struct ev_timer *w)	1234	ev_timer_stop (EV_P_ struct ev_timer *w)
813	{	1235	{
814	ev_clear_pending ((W)w);	1236	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1237	if (!ev_is_active (w))
816	return;	1238	return;
817		1239
		1240	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1241
818	if (w->active < timercnt--)	1242	if (((W)w)->active < timercnt--)
819	{	1243	{
820	timers [w->active - 1] = timers [timercnt];	1244	timers [((W)w)->active - 1] = timers [timercnt];
821	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
822	}	1246	}
823		1247
824	w->at = w->repeat;	1248	((WT)w)->at = w->repeat;
825		1249
826	ev_stop ((W)w);	1250	ev_stop (EV_A_ (W)w);
827	}	1251	}
828		1252
829	void	1253	void
830	ev_timer_again (struct ev_timer *w)	1254	ev_timer_again (EV_P_ struct ev_timer *w)
831	{	1255	{
832	if (ev_is_active (w))	1256	if (ev_is_active (w))
833	{	1257	{
834	if (w->repeat)	1258	if (w->repeat)
835	{	1259	{
836	w->at = now + w->repeat;	1260	((WT)w)->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1261	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
838	}	1262	}
839	else	1263	else
840	ev_timer_stop (w);	1264	ev_timer_stop (EV_A_ w);
841	}	1265	}
842	else if (w->repeat)	1266	else if (w->repeat)
843	ev_timer_start (w);	1267	ev_timer_start (EV_A_ w);
844	}	1268	}
845		1269
846	void	1270	void
847	ev_periodic_start (struct ev_periodic *w)	1271	ev_periodic_start (EV_P_ struct ev_periodic *w)
848	{	1272	{
849	if (ev_is_active (w))	1273	if (ev_is_active (w))
850	return;	1274	return;
851		1275
852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1276	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
853		1277
854	/* this formula differs from the one in periodic_reify because we do not always round up */	1278	/* this formula differs from the one in periodic_reify because we do not always round up */
855	if (w->interval)	1279	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1280	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
857		1281
858	ev_start ((W)w, ++periodiccnt);	1282	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1283	array_needsize (periodics, periodicmax, periodiccnt, );
860	periodics [periodiccnt - 1] = w;	1284	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1285	upheap ((WT *)periodics, periodiccnt - 1);
862	}
863		1286
		1287	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1288	}
		1289
864	void	1290	void
865	ev_periodic_stop (struct ev_periodic *w)	1291	ev_periodic_stop (EV_P_ struct ev_periodic *w)
866	{	1292	{
867	ev_clear_pending ((W)w);	1293	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1294	if (!ev_is_active (w))
869	return;	1295	return;
870		1296
		1297	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1298
871	if (w->active < periodiccnt--)	1299	if (((W)w)->active < periodiccnt--)
872	{	1300	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1301	periodics [((W)w)->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1302	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
875	}	1303	}
876		1304
877	ev_stop ((W)w);	1305	ev_stop (EV_A_ (W)w);
878	}	1306	}
879		1307
880	void	1308	void
881	ev_signal_start (struct ev_signal *w)	1309	ev_idle_start (EV_P_ struct ev_idle *w)
882	{	1310	{
883	if (ev_is_active (w))	1311	if (ev_is_active (w))
884	return;	1312	return;
885		1313
		1314	ev_start (EV_A_ (W)w, ++idlecnt);
		1315	array_needsize (idles, idlemax, idlecnt, );
		1316	idles [idlecnt - 1] = w;
		1317	}
		1318
		1319	void
		1320	ev_idle_stop (EV_P_ struct ev_idle *w)
		1321	{
		1322	ev_clear_pending (EV_A_ (W)w);
		1323	if (ev_is_active (w))
		1324	return;
		1325
		1326	idles [((W)w)->active - 1] = idles [--idlecnt];
		1327	ev_stop (EV_A_ (W)w);
		1328	}
		1329
		1330	void
		1331	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1332	{
		1333	if (ev_is_active (w))
		1334	return;
		1335
		1336	ev_start (EV_A_ (W)w, ++preparecnt);
		1337	array_needsize (prepares, preparemax, preparecnt, );
		1338	prepares [preparecnt - 1] = w;
		1339	}
		1340
		1341	void
		1342	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1343	{
		1344	ev_clear_pending (EV_A_ (W)w);
		1345	if (ev_is_active (w))
		1346	return;
		1347
		1348	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1349	ev_stop (EV_A_ (W)w);
		1350	}
		1351
		1352	void
		1353	ev_check_start (EV_P_ struct ev_check *w)
		1354	{
		1355	if (ev_is_active (w))
		1356	return;
		1357
		1358	ev_start (EV_A_ (W)w, ++checkcnt);
		1359	array_needsize (checks, checkmax, checkcnt, );
		1360	checks [checkcnt - 1] = w;
		1361	}
		1362
		1363	void
		1364	ev_check_stop (EV_P_ struct ev_check *w)
		1365	{
		1366	ev_clear_pending (EV_A_ (W)w);
		1367	if (ev_is_active (w))
		1368	return;
		1369
		1370	checks [((W)w)->active - 1] = checks [--checkcnt];
		1371	ev_stop (EV_A_ (W)w);
		1372	}
		1373
		1374	#ifndef SA_RESTART
		1375	# define SA_RESTART 0
		1376	#endif
		1377
		1378	void
		1379	ev_signal_start (EV_P_ struct ev_signal *w)
		1380	{
		1381	#if EV_MULTIPLICITY
		1382	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1383	#endif
		1384	if (ev_is_active (w))
		1385	return;
		1386
886	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1387	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
887		1388
888	ev_start ((W)w, 1);	1389	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1390	array_needsize (signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1391	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1392
892	if (!w->next)	1393	if (!((WL)w)->next)
893	{	1394	{
		1395	#if WIN32
		1396	signal (w->signum, sighandler);
		1397	#else
894	struct sigaction sa;	1398	struct sigaction sa;
895	sa.sa_handler = sighandler;	1399	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1400	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1401	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1402	sigaction (w->signum, &sa, 0);
		1403	#endif
899	}	1404	}
900	}	1405	}
901		1406
902	void	1407	void
903	ev_signal_stop (struct ev_signal *w)	1408	ev_signal_stop (EV_P_ struct ev_signal *w)
904	{	1409	{
905	ev_clear_pending ((W)w);	1410	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1411	if (!ev_is_active (w))
907	return;	1412	return;
908		1413
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1414	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1415	ev_stop (EV_A_ (W)w);
911		1416
912	if (!signals [w->signum - 1].head)	1417	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1418	signal (w->signum, SIG_DFL);
914	}	1419	}
915		1420
916	void	1421	void
917	ev_idle_start (struct ev_idle *w)	1422	ev_child_start (EV_P_ struct ev_child *w)
918	{	1423	{
		1424	#if EV_MULTIPLICITY
		1425	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1426	#endif
919	if (ev_is_active (w))	1427	if (ev_is_active (w))
920	return;	1428	return;
921		1429
922	ev_start ((W)w, ++idlecnt);	1430	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	1431	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	1432	}
926		1433
927	void	1434	void
928	ev_idle_stop (struct ev_idle *w)	1435	ev_child_stop (EV_P_ struct ev_child *w)
929	{	1436	{
930	ev_clear_pending ((W)w);	1437	ev_clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	1438	if (ev_is_active (w))
932	return;	1439	return;
933		1440
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);	1441	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1442	ev_stop (EV_A_ (W)w);
1001	}	1443	}
1002		1444
1003	/*****************************************************************************/	1445	/*****************************************************************************/
1004		1446
1005	struct ev_once	1447	struct ev_once
…		…
1009	void (*cb)(int revents, void *arg);	1451	void (*cb)(int revents, void *arg);
1010	void *arg;	1452	void *arg;
1011	};	1453	};
1012		1454
1013	static void	1455	static void
1014	once_cb (struct ev_once *once, int revents)	1456	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1457	{
1016	void (*cb)(int revents, void *arg) = once->cb;	1458	void (*cb)(int revents, void *arg) = once->cb;
1017	void *arg = once->arg;	1459	void *arg = once->arg;
1018		1460
1019	ev_io_stop (&once->io);	1461	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1462	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1463	ev_free (once);
1022		1464
1023	cb (revents, arg);	1465	cb (revents, arg);
1024	}	1466	}
1025		1467
1026	static void	1468	static void
1027	once_cb_io (struct ev_io *w, int revents)	1469	once_cb_io (EV_P_ struct ev_io *w, int revents)
1028	{	1470	{
1029	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1471	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1030	}	1472	}
1031		1473
1032	static void	1474	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1475	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1034	{	1476	{
1035	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1477	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1036	}	1478	}
1037		1479
1038	void	1480	void
1039	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1481	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1040	{	1482	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1483	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1042		1484
1043	if (!once)	1485	if (!once)
1044	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1486	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1045	else	1487	else
1046	{	1488	{
…		…
1049		1491
1050	ev_watcher_init (&once->io, once_cb_io);	1492	ev_watcher_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1493	if (fd >= 0)
1052	{	1494	{
1053	ev_io_set (&once->io, fd, events);	1495	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1496	ev_io_start (EV_A_ &once->io);
1055	}	1497	}
1056		1498
1057	ev_watcher_init (&once->to, once_cb_to);	1499	ev_watcher_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1500	if (timeout >= 0.)
1059	{	1501	{
1060	ev_timer_set (&once->to, timeout, 0.);	1502	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1503	ev_timer_start (EV_A_ &once->to);
1062	}	1504	}
1063	}	1505	}
1064	}	1506	}
1065		1507
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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