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Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.73 by root, Tue Nov 6 16:27:10 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>
38	#include <fcntl.h>	59	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	60	#include <stddef.h>
41		61
42	#include <stdio.h>	62	#include <stdio.h>
43		63
44	#include <assert.h>	64	#include <assert.h>
45	#include <errno.h>	65	#include <errno.h>
46	#include <sys/types.h>	66	#include <sys/types.h>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	67	#include <time.h>
50		68
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
51	/**/	76	/**/
52		77
53	#ifndef EV_USE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
55	#endif	80	#endif
56		81
57	#ifndef EV_USE_SELECT	82	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	83	# define EV_USE_SELECT 1
59	#endif	84	#endif
60		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
61	#ifndef EV_USE_EPOLL	90	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
		105	# endif
63	#endif	106	#endif
64		107
65	#ifndef EV_USE_REALTIME	108	#ifndef EV_USE_REALTIME
66	# define EV_USE_REALTIME 1	109	# define EV_USE_REALTIME 1
67	#endif	110	#endif
…		…
96	#endif	139	#endif
97		140
98	#define expect_false(expr) expect ((expr) != 0, 0)	141	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	142	#define expect_true(expr) expect ((expr) != 0, 1)
100		143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		146
101	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
104		150
105	static ev_tstamp now_floor, now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
106	ev_tstamp ev_now;
107	int ev_method;
108		152
109	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
110
111	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
112	static void (*method_modify)(int fd, int oev, int nev);
113	static void (*method_poll)(ev_tstamp timeout);
114		154
115	/*****************************************************************************/	155	/*****************************************************************************/
116		156
117	ev_tstamp	157	static void (*syserr_cb)(const char *msg);
		158
		159	void ev_set_syserr_cb (void (*cb)(const char *msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void *(*alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
		224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
118	ev_time (void)	239	ev_time (void)
119	{	240	{
120	#if EV_USE_REALTIME	241	#if EV_USE_REALTIME
121	struct timespec ts;	242	struct timespec ts;
122	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
…		…
126	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
127	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
128	#endif	249	#endif
129	}	250	}
130		251
131	static ev_tstamp	252	inline ev_tstamp
132	get_clock (void)	253	get_clock (void)
133	{	254	{
134	#if EV_USE_MONOTONIC	255	#if EV_USE_MONOTONIC
135	if (expect_true (have_monotonic))	256	if (expect_true (have_monotonic))
136	{	257	{
…		…
141	#endif	262	#endif
142		263
143	return ev_time ();	264	return ev_time ();
144	}	265	}
145		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
146	#define array_roundsize(base,n) ((n) | 4 & ~3)	273	#define array_roundsize(base,n) ((n) | 4 & ~3)
147		274
148	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(base,cur,cnt,init) \
149	if (expect_false ((cnt) > cur)) \	276	if (expect_false ((cnt) > cur)) \
150	{ \	277	{ \
151	int newcnt = cur; \	278	int newcnt = cur; \
152	do \	279	do \
153	{ \	280	{ \
154	newcnt = array_roundsize (base, newcnt << 1); \	281	newcnt = array_roundsize (base, newcnt << 1); \
155	} \	282	} \
156	while ((cnt) > newcnt); \	283	while ((cnt) > newcnt); \
157	\	284	\
158	base = realloc (base, sizeof (*base) * (newcnt)); \	285	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
159	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
160	cur = newcnt; \	287	cur = newcnt; \
161	}	288	}
		289
		290	#define array_slim(stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
162		305
163	/*****************************************************************************/	306	/*****************************************************************************/
164
165	typedef struct
166	{
167	struct ev_io *head;
168	unsigned char events;
169	unsigned char reify;
170	} ANFD;
171
172	static ANFD *anfds;
173	static int anfdmax;
174		307
175	static void	308	static void
176	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
177	{	310	{
178	while (count--)	311	while (count--)
…		…
183		316
184	++base;	317	++base;
185	}	318	}
186	}	319	}
187		320
188	typedef struct
189	{
190	W w;
191	int events;
192	} ANPENDING;
193
194	static ANPENDING *pendings;
195	static int pendingmax, pendingcnt;
196
197	static void	321	static void
198	event (W w, int events)	322	event (EV_P_ W w, int events)
199	{	323	{
200	if (w->pending)	324	if (w->pending)
201	{	325	{
202	pendings [w->pending - 1].events |= events;	326	pendings [ABSPRI (w)][w->pending - 1].events |= events;
203	return;	327	return;
204	}	328	}
205		329
206	w->pending = ++pendingcnt;	330	w->pending = ++pendingcnt [ABSPRI (w)];
207	array_needsize (pendings, pendingmax, pendingcnt, );	331	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
208	pendings [pendingcnt - 1].w = w;	332	pendings [ABSPRI (w)][w->pending - 1].w = w;
209	pendings [pendingcnt - 1].events = events;	333	pendings [ABSPRI (w)][w->pending - 1].events = events;
210	}	334	}
211		335
212	static void	336	static void
213	queue_events (W *events, int eventcnt, int type)	337	queue_events (EV_P_ W *events, int eventcnt, int type)
214	{	338	{
215	int i;	339	int i;
216		340
217	for (i = 0; i < eventcnt; ++i)	341	for (i = 0; i < eventcnt; ++i)
218	event (events [i], type);	342	event (EV_A_ events [i], type);
219	}	343	}
220		344
221	static void	345	static void
222	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
223	{	347	{
224	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
225	struct ev_io *w;	349	struct ev_io *w;
226		350
227	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
228	{	352	{
229	int ev = w->events & events;	353	int ev = w->events & events;
230		354
231	if (ev)	355	if (ev)
232	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
233	}	357	}
234	}	358	}
235		359
236	/*****************************************************************************/	360	/*****************************************************************************/
237		361
238	static int *fdchanges;
239	static int fdchangemax, fdchangecnt;
240
241	static void	362	static void
242	fd_reify (void)	363	fd_reify (EV_P)
243	{	364	{
244	int i;	365	int i;
245		366
246	for (i = 0; i < fdchangecnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
247	{	368	{
…		…
249	ANFD *anfd = anfds + fd;	370	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	371	struct ev_io *w;
251		372
252	int events = 0;	373	int events = 0;
253		374
254	for (w = anfd->head; w; w = w->next)	375	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
255	events |= w->events;	376	events |= w->events;
256		377
257	anfd->reify = 0;	378	anfd->reify = 0;
258		379
259	if (anfd->events != events)
260	{
261	method_modify (fd, anfd->events, events);	380	method_modify (EV_A_ fd, anfd->events, events);
262	anfd->events = events;	381	anfd->events = events;
263	}
264	}	382	}
265		383
266	fdchangecnt = 0;	384	fdchangecnt = 0;
267	}	385	}
268		386
269	static void	387	static void
270	fd_change (int fd)	388	fd_change (EV_P_ int fd)
271	{	389	{
272	if (anfds [fd].reify || fdchangecnt < 0)	390	if (anfds [fd].reify)
273	return;	391	return;
274		392
275	anfds [fd].reify = 1;	393	anfds [fd].reify = 1;
276		394
277	++fdchangecnt;	395	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	396	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
279	fdchanges [fdchangecnt - 1] = fd;	397	fdchanges [fdchangecnt - 1] = fd;
280	}	398	}
281		399
		400	static void
		401	fd_kill (EV_P_ int fd)
		402	{
		403	struct ev_io *w;
		404
		405	while ((w = (struct ev_io *)anfds [fd].head))
		406	{
		407	ev_io_stop (EV_A_ w);
		408	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		409	}
		410	}
		411
		412	static int
		413	fd_valid (int fd)
		414	{
		415	#ifdef WIN32
		416	return !!win32_get_osfhandle (fd);
		417	#else
		418	return fcntl (fd, F_GETFD) != -1;
		419	#endif
		420	}
		421
282	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
283	static void	423	static void
284	fd_recheck (void)	424	fd_ebadf (EV_P)
285	{	425	{
286	int fd;	426	int fd;
287		427
288	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	429	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
291	while (anfds [fd].head)	431	fd_kill (EV_A_ fd);
		432	}
		433
		434	/* called on ENOMEM in select/poll to kill some fds and retry */
		435	static void
		436	fd_enomem (EV_P)
		437	{
		438	int fd;
		439
		440	for (fd = anfdmax; fd--; )
		441	if (anfds [fd].events)
292	{	442	{
293	ev_io_stop (anfds [fd].head);	443	fd_kill (EV_A_ fd);
294	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	444	return;
295	}	445	}
		446	}
		447
		448	/* usually called after fork if method needs to re-arm all fds from scratch */
		449	static void
		450	fd_rearm_all (EV_P)
		451	{
		452	int fd;
		453
		454	/* this should be highly optimised to not do anything but set a flag */
		455	for (fd = 0; fd < anfdmax; ++fd)
		456	if (anfds [fd].events)
		457	{
		458	anfds [fd].events = 0;
		459	fd_change (EV_A_ fd);
		460	}
296	}	461	}
297		462
298	/*****************************************************************************/	463	/*****************************************************************************/
299		464
300	static struct ev_timer **timers;
301	static int timermax, timercnt;
302
303	static struct ev_periodic **periodics;
304	static int periodicmax, periodiccnt;
305
306	static void	465	static void
307	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
308	{	467	{
309	WT w = timers [k];	468	WT w = heap [k];
310		469
311	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
312	{	471	{
313	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
314	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
315	k >>= 1;	474	k >>= 1;
316	}	475	}
317		476
318	timers [k] = w;	477	heap [k] = w;
319	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
320		479
321	}	480	}
322		481
323	static void	482	static void
324	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
325	{	484	{
326	WT w = timers [k];	485	WT w = heap [k];
327		486
328	while (k < (N >> 1))	487	while (k < (N >> 1))
329	{	488	{
330	int j = k << 1;	489	int j = k << 1;
331		490
332	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
333	++j;	492	++j;
334		493
335	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
336	break;	495	break;
337		496
338	timers [k] = timers [j];	497	heap [k] = heap [j];
339	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
340	k = j;	499	k = j;
341	}	500	}
342		501
343	timers [k] = w;	502	heap [k] = w;
344	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
345	}	504	}
346		505
347	/*****************************************************************************/	506	/*****************************************************************************/
348		507
349	typedef struct	508	typedef struct
350	{	509	{
351	struct ev_signal *head;	510	WL head;
352	sig_atomic_t volatile gotsig;	511	sig_atomic_t volatile gotsig;
353	} ANSIG;	512	} ANSIG;
354		513
355	static ANSIG *signals;	514	static ANSIG *signals;
356	static int signalmax;	515	static int signalmax;
…		…
372	}	531	}
373		532
374	static void	533	static void
375	sighandler (int signum)	534	sighandler (int signum)
376	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
377	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
378		541
379	if (!gotsig)	542	if (!gotsig)
380	{	543	{
		544	int old_errno = errno;
381	gotsig = 1;	545	gotsig = 1;
382	write (sigpipe [1], &signum, 1);	546	write (sigpipe [1], &signum, 1);
		547	errno = old_errno;
383	}	548	}
384	}	549	}
385		550
386	static void	551	static void
387	sigcb (struct ev_io *iow, int revents)	552	sigcb (EV_P_ struct ev_io *iow, int revents)
388	{	553	{
389	struct ev_signal *w;	554	WL w;
390	int signum;	555	int signum;
391		556
392	read (sigpipe [0], &revents, 1);	557	read (sigpipe [0], &revents, 1);
393	gotsig = 0;	558	gotsig = 0;
394		559
…		…
396	if (signals [signum].gotsig)	561	if (signals [signum].gotsig)
397	{	562	{
398	signals [signum].gotsig = 0;	563	signals [signum].gotsig = 0;
399		564
400	for (w = signals [signum].head; w; w = w->next)	565	for (w = signals [signum].head; w; w = w->next)
401	event ((W)w, EV_SIGNAL);	566	event (EV_A_ (W)w, EV_SIGNAL);
402	}	567	}
403	}	568	}
404		569
405	static void	570	static void
406	siginit (void)	571	siginit (EV_P)
407	{	572	{
		573	#ifndef WIN32
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	574	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	575	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410		576
411	/* rather than sort out wether we really need nb, set it */	577	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	578	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	579	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		580	#endif
414		581
415	ev_io_set (&sigev, sigpipe [0], EV_READ);	582	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);	583	ev_io_start (EV_A_ &sigev);
		584	ev_unref (EV_A); /* child watcher should not keep loop alive */
417	}	585	}
418		586
419	/*****************************************************************************/	587	/*****************************************************************************/
420		588
421	static struct ev_idle **idles;
422	static int idlemax, idlecnt;
423
424	static struct ev_prepare **prepares;
425	static int preparemax, preparecnt;
426
427	static struct ev_check **checks;
428	static int checkmax, checkcnt;
429
430	/*****************************************************************************/
431
432	static struct ev_child *childs [PID_HASHSIZE];	589	static struct ev_child *childs [PID_HASHSIZE];
		590
		591	#ifndef WIN32
		592
433	static struct ev_signal childev;	593	static struct ev_signal childev;
434		594
435	#ifndef WCONTINUED	595	#ifndef WCONTINUED
436	# define WCONTINUED 0	596	# define WCONTINUED 0
437	#endif	597	#endif
438		598
439	static void	599	static void
440	childcb (struct ev_signal *sw, int revents)	600	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
441	{	601	{
442	struct ev_child *w;	602	struct ev_child *w;
		603
		604	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		605	if (w->pid == pid || !w->pid)
		606	{
		607	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		608	w->rpid = pid;
		609	w->rstatus = status;
		610	event (EV_A_ (W)w, EV_CHILD);
		611	}
		612	}
		613
		614	static void
		615	childcb (EV_P_ struct ev_signal *sw, int revents)
		616	{
443	int pid, status;	617	int pid, status;
444		618
445	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	619	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	620	{
447	if (w->pid == pid || !w->pid)	621	/* make sure we are called again until all childs have been reaped */
448	{	622	event (EV_A_ (W)sw, EV_SIGNAL);
449	w->status = status;	623
450	event ((W)w, EV_CHILD);	624	child_reap (EV_A_ sw, pid, pid, status);
451	}	625	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		626	}
452	}	627	}
		628
		629	#endif
453		630
454	/*****************************************************************************/	631	/*****************************************************************************/
455		632
		633	#if EV_USE_KQUEUE
		634	# include "ev_kqueue.c"
		635	#endif
456	#if EV_USE_EPOLL	636	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	637	# include "ev_epoll.c"
458	#endif	638	#endif
		639	#if EV_USE_POLL
		640	# include "ev_poll.c"
		641	#endif
459	#if EV_USE_SELECT	642	#if EV_USE_SELECT
460	# include "ev_select.c"	643	# include "ev_select.c"
461	#endif	644	#endif
462		645
463	int	646	int
…		…
470	ev_version_minor (void)	653	ev_version_minor (void)
471	{	654	{
472	return EV_VERSION_MINOR;	655	return EV_VERSION_MINOR;
473	}	656	}
474		657
475	int ev_init (int flags)	658	/* return true if we are running with elevated privileges and should ignore env variables */
		659	static int
		660	enable_secure (void)
476	{	661	{
		662	#ifdef WIN32
		663	return 0;
		664	#else
		665	return getuid () != geteuid ()
		666	|| getgid () != getegid ();
		667	#endif
		668	}
		669
		670	int
		671	ev_method (EV_P)
		672	{
		673	return method;
		674	}
		675
		676	static void
		677	loop_init (EV_P_ int methods)
		678	{
477	if (!ev_method)	679	if (!method)
478	{	680	{
479	#if EV_USE_MONOTONIC	681	#if EV_USE_MONOTONIC
480	{	682	{
481	struct timespec ts;	683	struct timespec ts;
482	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	684	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
483	have_monotonic = 1;	685	have_monotonic = 1;
484	}	686	}
485	#endif	687	#endif
486		688
487	ev_now = ev_time ();	689	rt_now = ev_time ();
488	now = get_clock ();	690	mn_now = get_clock ();
489	now_floor = now;	691	now_floor = mn_now;
490	diff = ev_now - now;	692	rtmn_diff = rt_now - mn_now;
491		693
492	if (pipe (sigpipe))	694	if (methods == EVMETHOD_AUTO)
493	return 0;	695	if (!enable_secure () && getenv ("LIBEV_METHODS"))
494		696	methods = atoi (getenv ("LIBEV_METHODS"));
		697	else
495	ev_method = EVMETHOD_NONE;	698	methods = EVMETHOD_ANY;
		699
		700	method = 0;
		701	#if EV_USE_WIN32
		702	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		703	#endif
		704	#if EV_USE_KQUEUE
		705	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		706	#endif
496	#if EV_USE_EPOLL	707	#if EV_USE_EPOLL
497	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	708	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		709	#endif
		710	#if EV_USE_POLL
		711	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
498	#endif	712	#endif
499	#if EV_USE_SELECT	713	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	714	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
501	#endif	715	#endif
502		716
		717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
		719	}
		720	}
		721
		722	void
		723	loop_destroy (EV_P)
		724	{
		725	int i;
		726
		727	#if EV_USE_WIN32
		728	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		729	#endif
		730	#if EV_USE_KQUEUE
		731	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		732	#endif
		733	#if EV_USE_EPOLL
		734	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		735	#endif
		736	#if EV_USE_POLL
		737	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		738	#endif
		739	#if EV_USE_SELECT
		740	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		741	#endif
		742
		743	for (i = NUMPRI; i--; )
		744	array_free (pending, [i]);
		745
		746	/* have to use the microsoft-never-gets-it-right macro */
		747	array_free_microshit (fdchange);
		748	array_free_microshit (timer);
		749	array_free_microshit (periodic);
		750	array_free_microshit (idle);
		751	array_free_microshit (prepare);
		752	array_free_microshit (check);
		753
		754	method = 0;
		755	}
		756
		757	static void
		758	loop_fork (EV_P)
		759	{
		760	#if EV_USE_EPOLL
		761	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		762	#endif
		763	#if EV_USE_KQUEUE
		764	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		765	#endif
		766
		767	if (ev_is_active (&sigev))
		768	{
		769	/* default loop */
		770
		771	ev_ref (EV_A);
		772	ev_io_stop (EV_A_ &sigev);
		773	close (sigpipe [0]);
		774	close (sigpipe [1]);
		775
		776	while (pipe (sigpipe))
		777	syserr ("(libev) error creating pipe");
		778
		779	siginit (EV_A);
		780	}
		781
		782	postfork = 0;
		783	}
		784
		785	#if EV_MULTIPLICITY
		786	struct ev_loop *
		787	ev_loop_new (int methods)
		788	{
		789	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		790
		791	memset (loop, 0, sizeof (struct ev_loop));
		792
		793	loop_init (EV_A_ methods);
		794
		795	if (ev_method (EV_A))
		796	return loop;
		797
		798	return 0;
		799	}
		800
		801	void
		802	ev_loop_destroy (EV_P)
		803	{
		804	loop_destroy (EV_A);
		805	ev_free (loop);
		806	}
		807
		808	void
		809	ev_loop_fork (EV_P)
		810	{
		811	postfork = 1;
		812	}
		813
		814	#endif
		815
		816	#if EV_MULTIPLICITY
		817	struct ev_loop default_loop_struct;
		818	static struct ev_loop *default_loop;
		819
		820	struct ev_loop *
		821	#else
		822	static int default_loop;
		823
		824	int
		825	#endif
		826	ev_default_loop (int methods)
		827	{
		828	if (sigpipe [0] == sigpipe [1])
		829	if (pipe (sigpipe))
		830	return 0;
		831
		832	if (!default_loop)
		833	{
		834	#if EV_MULTIPLICITY
		835	struct ev_loop *loop = default_loop = &default_loop_struct;
		836	#else
		837	default_loop = 1;
		838	#endif
		839
		840	loop_init (EV_A_ methods);
		841
503	if (ev_method)	842	if (ev_method (EV_A))
504	{	843	{
505	ev_watcher_init (&sigev, sigcb);
506	siginit ();	844	siginit (EV_A);
507		845
		846	#ifndef WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	847	ev_signal_init (&childev, childcb, SIGCHLD);
		848	ev_set_priority (&childev, EV_MAXPRI);
509	ev_signal_start (&childev);	849	ev_signal_start (EV_A_ &childev);
		850	ev_unref (EV_A); /* child watcher should not keep loop alive */
		851	#endif
510	}	852	}
		853	else
		854	default_loop = 0;
511	}	855	}
512		856
513	return ev_method;	857	return default_loop;
		858	}
		859
		860	void
		861	ev_default_destroy (void)
		862	{
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *loop = default_loop;
		865	#endif
		866
		867	#ifndef WIN32
		868	ev_ref (EV_A); /* child watcher */
		869	ev_signal_stop (EV_A_ &childev);
		870	#endif
		871
		872	ev_ref (EV_A); /* signal watcher */
		873	ev_io_stop (EV_A_ &sigev);
		874
		875	close (sigpipe [0]); sigpipe [0] = 0;
		876	close (sigpipe [1]); sigpipe [1] = 0;
		877
		878	loop_destroy (EV_A);
		879	}
		880
		881	void
		882	ev_default_fork (void)
		883	{
		884	#if EV_MULTIPLICITY
		885	struct ev_loop *loop = default_loop;
		886	#endif
		887
		888	if (method)
		889	postfork = 1;
514	}	890	}
515		891
516	/*****************************************************************************/	892	/*****************************************************************************/
517		893
518	void
519	ev_fork_prepare (void)
520	{
521	/* nop */
522	}
523
524	void
525	ev_fork_parent (void)
526	{
527	/* nop */
528	}
529
530	void
531	ev_fork_child (void)
532	{
533	#if EV_USE_EPOLL
534	if (ev_method == EVMETHOD_EPOLL)
535	epoll_postfork_child ();
536	#endif
537
538	ev_io_stop (&sigev);
539	close (sigpipe [0]);
540	close (sigpipe [1]);
541	pipe (sigpipe);
542	siginit ();
543	}
544
545	/*****************************************************************************/
546
547	static void	894	static void
548	call_pending (void)	895	call_pending (EV_P)
549	{	896	{
		897	int pri;
		898
		899	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	900	while (pendingcnt [pri])
551	{	901	{
552	ANPENDING *p = pendings + --pendingcnt;	902	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		903
554	if (p->w)	904	if (p->w)
555	{	905	{
556	p->w->pending = 0;	906	p->w->pending = 0;
557	p->w->cb (p->w, p->events);	907	p->w->cb (EV_A_ p->w, p->events);
558	}	908	}
559	}	909	}
560	}	910	}
561		911
562	static void	912	static void
563	timers_reify (void)	913	timers_reify (EV_P)
564	{	914	{
565	while (timercnt && timers [0]->at <= now)	915	while (timercnt && ((WT)timers [0])->at <= mn_now)
566	{	916	{
567	struct ev_timer *w = timers [0];	917	struct ev_timer *w = timers [0];
		918
		919	assert (("inactive timer on timer heap detected", ev_is_active (w)));
568		920
569	/* first reschedule or stop timer */	921	/* first reschedule or stop timer */
570	if (w->repeat)	922	if (w->repeat)
571	{	923	{
572	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	924	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
573	w->at = now + w->repeat;	925	((WT)w)->at = mn_now + w->repeat;
574	downheap ((WT *)timers, timercnt, 0);	926	downheap ((WT *)timers, timercnt, 0);
575	}	927	}
576	else	928	else
577	ev_timer_stop (w); /* nonrepeating: stop timer */	929	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
578		930
579	event ((W)w, EV_TIMEOUT);	931	event (EV_A_ (W)w, EV_TIMEOUT);
580	}	932	}
581	}	933	}
582		934
583	static void	935	static void
584	periodics_reify (void)	936	periodics_reify (EV_P)
585	{	937	{
586	while (periodiccnt && periodics [0]->at <= ev_now)	938	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
587	{	939	{
588	struct ev_periodic *w = periodics [0];	940	struct ev_periodic *w = periodics [0];
		941
		942	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
589		943
590	/* first reschedule or stop timer */	944	/* first reschedule or stop timer */
591	if (w->interval)	945	if (w->interval)
592	{	946	{
593	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	947	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
594	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	948	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
595	downheap ((WT *)periodics, periodiccnt, 0);	949	downheap ((WT *)periodics, periodiccnt, 0);
596	}	950	}
597	else	951	else
598	ev_periodic_stop (w); /* nonrepeating: stop timer */	952	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
599		953
600	event ((W)w, EV_PERIODIC);	954	event (EV_A_ (W)w, EV_PERIODIC);
601	}	955	}
602	}	956	}
603		957
604	static void	958	static void
605	periodics_reschedule (ev_tstamp diff)	959	periodics_reschedule (EV_P)
606	{	960	{
607	int i;	961	int i;
608		962
609	/* adjust periodics after time jump */	963	/* adjust periodics after time jump */
610	for (i = 0; i < periodiccnt; ++i)	964	for (i = 0; i < periodiccnt; ++i)
611	{	965	{
612	struct ev_periodic *w = periodics [i];	966	struct ev_periodic *w = periodics [i];
613		967
614	if (w->interval)	968	if (w->interval)
615	{	969	{
616	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	970	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
617		971
618	if (fabs (diff) >= 1e-4)	972	if (fabs (diff) >= 1e-4)
619	{	973	{
620	ev_periodic_stop (w);	974	ev_periodic_stop (EV_A_ w);
621	ev_periodic_start (w);	975	ev_periodic_start (EV_A_ w);
622		976
623	i = 0; /* restart loop, inefficient, but time jumps should be rare */	977	i = 0; /* restart loop, inefficient, but time jumps should be rare */
624	}	978	}
625	}	979	}
626	}	980	}
627	}	981	}
628		982
629	static int	983	inline int
630	time_update_monotonic (void)	984	time_update_monotonic (EV_P)
631	{	985	{
632	now = get_clock ();	986	mn_now = get_clock ();
633		987
634	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	988	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
635	{	989	{
636	ev_now = now + diff;	990	rt_now = rtmn_diff + mn_now;
637	return 0;	991	return 0;
638	}	992	}
639	else	993	else
640	{	994	{
641	now_floor = now;	995	now_floor = mn_now;
642	ev_now = ev_time ();	996	rt_now = ev_time ();
643	return 1;	997	return 1;
644	}	998	}
645	}	999	}
646		1000
647	static void	1001	static void
648	time_update (void)	1002	time_update (EV_P)
649	{	1003	{
650	int i;	1004	int i;
651		1005
652	#if EV_USE_MONOTONIC	1006	#if EV_USE_MONOTONIC
653	if (expect_true (have_monotonic))	1007	if (expect_true (have_monotonic))
654	{	1008	{
655	if (time_update_monotonic ())	1009	if (time_update_monotonic (EV_A))
656	{	1010	{
657	ev_tstamp odiff = diff;	1011	ev_tstamp odiff = rtmn_diff;
658		1012
659	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1013	for (i = 4; --i; ) /* loop a few times, before making important decisions */
660	{	1014	{
661	diff = ev_now - now;	1015	rtmn_diff = rt_now - mn_now;
662		1016
663	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1017	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
664	return; /* all is well */	1018	return; /* all is well */
665		1019
666	ev_now = ev_time ();	1020	rt_now = ev_time ();
667	now = get_clock ();	1021	mn_now = get_clock ();
668	now_floor = now;	1022	now_floor = mn_now;
669	}	1023	}
670		1024
671	periodics_reschedule (diff - odiff);	1025	periodics_reschedule (EV_A);
672	/* no timer adjustment, as the monotonic clock doesn't jump */	1026	/* no timer adjustment, as the monotonic clock doesn't jump */
		1027	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
673	}	1028	}
674	}	1029	}
675	else	1030	else
676	#endif	1031	#endif
677	{	1032	{
678	ev_now = ev_time ();	1033	rt_now = ev_time ();
679		1034
680	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1035	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
681	{	1036	{
682	periodics_reschedule (ev_now - now);	1037	periodics_reschedule (EV_A);
683		1038
684	/* adjust timers. this is easy, as the offset is the same for all */	1039	/* adjust timers. this is easy, as the offset is the same for all */
685	for (i = 0; i < timercnt; ++i)	1040	for (i = 0; i < timercnt; ++i)
686	timers [i]->at += diff;	1041	((WT)timers [i])->at += rt_now - mn_now;
687	}	1042	}
688		1043
689	now = ev_now;	1044	mn_now = rt_now;
690	}	1045	}
691	}	1046	}
692		1047
693	int ev_loop_done;	1048	void
		1049	ev_ref (EV_P)
		1050	{
		1051	++activecnt;
		1052	}
694		1053
		1054	void
		1055	ev_unref (EV_P)
		1056	{
		1057	--activecnt;
		1058	}
		1059
		1060	static int loop_done;
		1061
		1062	void
695	void ev_loop (int flags)	1063	ev_loop (EV_P_ int flags)
696	{	1064	{
697	double block;	1065	double block;
698	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1066	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
699		1067
700	do	1068	do
701	{	1069	{
702	/* queue check watchers (and execute them) */	1070	/* queue check watchers (and execute them) */
703	if (expect_false (preparecnt))	1071	if (expect_false (preparecnt))
704	{	1072	{
705	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1073	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
706	call_pending ();	1074	call_pending (EV_A);
707	}	1075	}
708		1076
		1077	/* we might have forked, so reify kernel state if necessary */
		1078	if (expect_false (postfork))
		1079	loop_fork (EV_A);
		1080
709	/* update fd-related kernel structures */	1081	/* update fd-related kernel structures */
710	fd_reify ();	1082	fd_reify (EV_A);
711		1083
712	/* calculate blocking time */	1084	/* calculate blocking time */
713		1085
714	/* we only need this for !monotonic clockor timers, but as we basically	1086	/* we only need this for !monotonic clockor timers, but as we basically
715	always have timers, we just calculate it always */	1087	always have timers, we just calculate it always */
716	#if EV_USE_MONOTONIC	1088	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	1089	if (expect_true (have_monotonic))
718	time_update_monotonic ();	1090	time_update_monotonic (EV_A);
719	else	1091	else
720	#endif	1092	#endif
721	{	1093	{
722	ev_now = ev_time ();	1094	rt_now = ev_time ();
723	now = ev_now;	1095	mn_now = rt_now;
724	}	1096	}
725		1097
726	if (flags & EVLOOP_NONBLOCK || idlecnt)	1098	if (flags & EVLOOP_NONBLOCK || idlecnt)
727	block = 0.;	1099	block = 0.;
728	else	1100	else
729	{	1101	{
730	block = MAX_BLOCKTIME;	1102	block = MAX_BLOCKTIME;
731		1103
732	if (timercnt)	1104	if (timercnt)
733	{	1105	{
734	ev_tstamp to = timers [0]->at - now + method_fudge;	1106	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
735	if (block > to) block = to;	1107	if (block > to) block = to;
736	}	1108	}
737		1109
738	if (periodiccnt)	1110	if (periodiccnt)
739	{	1111	{
740	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1112	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
741	if (block > to) block = to;	1113	if (block > to) block = to;
742	}	1114	}
743		1115
744	if (block < 0.) block = 0.;	1116	if (block < 0.) block = 0.;
745	}	1117	}
746		1118
747	method_poll (block);	1119	method_poll (EV_A_ block);
748		1120
749	/* update ev_now, do magic */	1121	/* update rt_now, do magic */
750	time_update ();	1122	time_update (EV_A);
751		1123
752	/* queue pending timers and reschedule them */	1124	/* queue pending timers and reschedule them */
753	timers_reify (); /* relative timers called last */	1125	timers_reify (EV_A); /* relative timers called last */
754	periodics_reify (); /* absolute timers called first */	1126	periodics_reify (EV_A); /* absolute timers called first */
755		1127
756	/* queue idle watchers unless io or timers are pending */	1128	/* queue idle watchers unless io or timers are pending */
757	if (!pendingcnt)	1129	if (!pendingcnt)
758	queue_events ((W *)idles, idlecnt, EV_IDLE);	1130	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
759		1131
760	/* queue check watchers, to be executed first */	1132	/* queue check watchers, to be executed first */
761	if (checkcnt)	1133	if (checkcnt)
762	queue_events ((W *)checks, checkcnt, EV_CHECK);	1134	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
763		1135
764	call_pending ();	1136	call_pending (EV_A);
765	}	1137	}
766	while (!ev_loop_done);	1138	while (activecnt && !loop_done);
767		1139
768	if (ev_loop_done != 2)	1140	if (loop_done != 2)
769	ev_loop_done = 0;	1141	loop_done = 0;
		1142	}
		1143
		1144	void
		1145	ev_unloop (EV_P_ int how)
		1146	{
		1147	loop_done = how;
770	}	1148	}
771		1149
772	/*****************************************************************************/	1150	/*****************************************************************************/
773		1151
774	static void	1152	inline void
775	wlist_add (WL *head, WL elem)	1153	wlist_add (WL *head, WL elem)
776	{	1154	{
777	elem->next = *head;	1155	elem->next = *head;
778	*head = elem;	1156	*head = elem;
779	}	1157	}
780		1158
781	static void	1159	inline void
782	wlist_del (WL *head, WL elem)	1160	wlist_del (WL *head, WL elem)
783	{	1161	{
784	while (*head)	1162	while (*head)
785	{	1163	{
786	if (*head == elem)	1164	if (*head == elem)
…		…
791		1169
792	head = &(*head)->next;	1170	head = &(*head)->next;
793	}	1171	}
794	}	1172	}
795		1173
796	static void	1174	inline void
797	ev_clear_pending (W w)	1175	ev_clear_pending (EV_P_ W w)
798	{	1176	{
799	if (w->pending)	1177	if (w->pending)
800	{	1178	{
801	pendings [w->pending - 1].w = 0;	1179	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	1180	w->pending = 0;
803	}	1181	}
804	}	1182	}
805		1183
806	static void	1184	inline void
807	ev_start (W w, int active)	1185	ev_start (EV_P_ W w, int active)
808	{	1186	{
		1187	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1188	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1189
809	w->active = active;	1190	w->active = active;
		1191	ev_ref (EV_A);
810	}	1192	}
811		1193
812	static void	1194	inline void
813	ev_stop (W w)	1195	ev_stop (EV_P_ W w)
814	{	1196	{
		1197	ev_unref (EV_A);
815	w->active = 0;	1198	w->active = 0;
816	}	1199	}
817		1200
818	/*****************************************************************************/	1201	/*****************************************************************************/
819		1202
820	void	1203	void
821	ev_io_start (struct ev_io *w)	1204	ev_io_start (EV_P_ struct ev_io *w)
822	{	1205	{
823	int fd = w->fd;	1206	int fd = w->fd;
824		1207
825	if (ev_is_active (w))	1208	if (ev_is_active (w))
826	return;	1209	return;
827		1210
828	assert (("ev_io_start called with negative fd", fd >= 0));	1211	assert (("ev_io_start called with negative fd", fd >= 0));
829		1212
830	ev_start ((W)w, 1);	1213	ev_start (EV_A_ (W)w, 1);
831	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1214	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
832	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1215	wlist_add ((WL *)&anfds[fd].head, (WL)w);
833		1216
834	fd_change (fd);	1217	fd_change (EV_A_ fd);
835	}	1218	}
836		1219
837	void	1220	void
838	ev_io_stop (struct ev_io *w)	1221	ev_io_stop (EV_P_ struct ev_io *w)
839	{	1222	{
840	ev_clear_pending ((W)w);	1223	ev_clear_pending (EV_A_ (W)w);
841	if (!ev_is_active (w))	1224	if (!ev_is_active (w))
842	return;	1225	return;
843		1226
844	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1227	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
845	ev_stop ((W)w);	1228	ev_stop (EV_A_ (W)w);
846		1229
847	fd_change (w->fd);	1230	fd_change (EV_A_ w->fd);
848	}	1231	}
849		1232
850	void	1233	void
851	ev_timer_start (struct ev_timer *w)	1234	ev_timer_start (EV_P_ struct ev_timer *w)
852	{	1235	{
853	if (ev_is_active (w))	1236	if (ev_is_active (w))
854	return;	1237	return;
855		1238
856	w->at += now;	1239	((WT)w)->at += mn_now;
857		1240
858	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1241	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859		1242
860	ev_start ((W)w, ++timercnt);	1243	ev_start (EV_A_ (W)w, ++timercnt);
861	array_needsize (timers, timermax, timercnt, );	1244	array_needsize (timers, timermax, timercnt, (void));
862	timers [timercnt - 1] = w;	1245	timers [timercnt - 1] = w;
863	upheap ((WT *)timers, timercnt - 1);	1246	upheap ((WT *)timers, timercnt - 1);
864	}
865		1247
		1248	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1249	}
		1250
866	void	1251	void
867	ev_timer_stop (struct ev_timer *w)	1252	ev_timer_stop (EV_P_ struct ev_timer *w)
868	{	1253	{
869	ev_clear_pending ((W)w);	1254	ev_clear_pending (EV_A_ (W)w);
870	if (!ev_is_active (w))	1255	if (!ev_is_active (w))
871	return;	1256	return;
872		1257
		1258	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1259
873	if (w->active < timercnt--)	1260	if (((W)w)->active < timercnt--)
874	{	1261	{
875	timers [w->active - 1] = timers [timercnt];	1262	timers [((W)w)->active - 1] = timers [timercnt];
876	downheap ((WT *)timers, timercnt, w->active - 1);	1263	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
877	}	1264	}
878		1265
879	w->at = w->repeat;	1266	((WT)w)->at = w->repeat;
880		1267
881	ev_stop ((W)w);	1268	ev_stop (EV_A_ (W)w);
882	}	1269	}
883		1270
884	void	1271	void
885	ev_timer_again (struct ev_timer *w)	1272	ev_timer_again (EV_P_ struct ev_timer *w)
886	{	1273	{
887	if (ev_is_active (w))	1274	if (ev_is_active (w))
888	{	1275	{
889	if (w->repeat)	1276	if (w->repeat)
890	{	1277	{
891	w->at = now + w->repeat;	1278	((WT)w)->at = mn_now + w->repeat;
892	downheap ((WT *)timers, timercnt, w->active - 1);	1279	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
893	}	1280	}
894	else	1281	else
895	ev_timer_stop (w);	1282	ev_timer_stop (EV_A_ w);
896	}	1283	}
897	else if (w->repeat)	1284	else if (w->repeat)
898	ev_timer_start (w);	1285	ev_timer_start (EV_A_ w);
899	}	1286	}
900		1287
901	void	1288	void
902	ev_periodic_start (struct ev_periodic *w)	1289	ev_periodic_start (EV_P_ struct ev_periodic *w)
903	{	1290	{
904	if (ev_is_active (w))	1291	if (ev_is_active (w))
905	return;	1292	return;
906		1293
907	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1294	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908		1295
909	/* this formula differs from the one in periodic_reify because we do not always round up */	1296	/* this formula differs from the one in periodic_reify because we do not always round up */
910	if (w->interval)	1297	if (w->interval)
911	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1298	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
912		1299
913	ev_start ((W)w, ++periodiccnt);	1300	ev_start (EV_A_ (W)w, ++periodiccnt);
914	array_needsize (periodics, periodicmax, periodiccnt, );	1301	array_needsize (periodics, periodicmax, periodiccnt, (void));
915	periodics [periodiccnt - 1] = w;	1302	periodics [periodiccnt - 1] = w;
916	upheap ((WT *)periodics, periodiccnt - 1);	1303	upheap ((WT *)periodics, periodiccnt - 1);
917	}
918		1304
		1305	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1306	}
		1307
919	void	1308	void
920	ev_periodic_stop (struct ev_periodic *w)	1309	ev_periodic_stop (EV_P_ struct ev_periodic *w)
921	{	1310	{
922	ev_clear_pending ((W)w);	1311	ev_clear_pending (EV_A_ (W)w);
923	if (!ev_is_active (w))	1312	if (!ev_is_active (w))
924	return;	1313	return;
925		1314
		1315	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1316
926	if (w->active < periodiccnt--)	1317	if (((W)w)->active < periodiccnt--)
927	{	1318	{
928	periodics [w->active - 1] = periodics [periodiccnt];	1319	periodics [((W)w)->active - 1] = periodics [periodiccnt];
929	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1320	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
930	}	1321	}
931		1322
932	ev_stop ((W)w);	1323	ev_stop (EV_A_ (W)w);
933	}	1324	}
934		1325
935	void	1326	void
936	ev_signal_start (struct ev_signal *w)	1327	ev_idle_start (EV_P_ struct ev_idle *w)
937	{	1328	{
938	if (ev_is_active (w))	1329	if (ev_is_active (w))
939	return;	1330	return;
940		1331
		1332	ev_start (EV_A_ (W)w, ++idlecnt);
		1333	array_needsize (idles, idlemax, idlecnt, (void));
		1334	idles [idlecnt - 1] = w;
		1335	}
		1336
		1337	void
		1338	ev_idle_stop (EV_P_ struct ev_idle *w)
		1339	{
		1340	ev_clear_pending (EV_A_ (W)w);
		1341	if (ev_is_active (w))
		1342	return;
		1343
		1344	idles [((W)w)->active - 1] = idles [--idlecnt];
		1345	ev_stop (EV_A_ (W)w);
		1346	}
		1347
		1348	void
		1349	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1350	{
		1351	if (ev_is_active (w))
		1352	return;
		1353
		1354	ev_start (EV_A_ (W)w, ++preparecnt);
		1355	array_needsize (prepares, preparemax, preparecnt, (void));
		1356	prepares [preparecnt - 1] = w;
		1357	}
		1358
		1359	void
		1360	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1361	{
		1362	ev_clear_pending (EV_A_ (W)w);
		1363	if (ev_is_active (w))
		1364	return;
		1365
		1366	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1367	ev_stop (EV_A_ (W)w);
		1368	}
		1369
		1370	void
		1371	ev_check_start (EV_P_ struct ev_check *w)
		1372	{
		1373	if (ev_is_active (w))
		1374	return;
		1375
		1376	ev_start (EV_A_ (W)w, ++checkcnt);
		1377	array_needsize (checks, checkmax, checkcnt, (void));
		1378	checks [checkcnt - 1] = w;
		1379	}
		1380
		1381	void
		1382	ev_check_stop (EV_P_ struct ev_check *w)
		1383	{
		1384	ev_clear_pending (EV_A_ (W)w);
		1385	if (ev_is_active (w))
		1386	return;
		1387
		1388	checks [((W)w)->active - 1] = checks [--checkcnt];
		1389	ev_stop (EV_A_ (W)w);
		1390	}
		1391
		1392	#ifndef SA_RESTART
		1393	# define SA_RESTART 0
		1394	#endif
		1395
		1396	void
		1397	ev_signal_start (EV_P_ struct ev_signal *w)
		1398	{
		1399	#if EV_MULTIPLICITY
		1400	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1401	#endif
		1402	if (ev_is_active (w))
		1403	return;
		1404
941	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1405	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942		1406
943	ev_start ((W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
944	array_needsize (signals, signalmax, w->signum, signals_init);	1408	array_needsize (signals, signalmax, w->signum, signals_init);
945	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1409	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
946		1410
947	if (!w->next)	1411	if (!((WL)w)->next)
948	{	1412	{
		1413	#if WIN32
		1414	signal (w->signum, sighandler);
		1415	#else
949	struct sigaction sa;	1416	struct sigaction sa;
950	sa.sa_handler = sighandler;	1417	sa.sa_handler = sighandler;
951	sigfillset (&sa.sa_mask);	1418	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	1419	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	1420	sigaction (w->signum, &sa, 0);
		1421	#endif
954	}	1422	}
955	}	1423	}
956		1424
957	void	1425	void
958	ev_signal_stop (struct ev_signal *w)	1426	ev_signal_stop (EV_P_ struct ev_signal *w)
959	{	1427	{
960	ev_clear_pending ((W)w);	1428	ev_clear_pending (EV_A_ (W)w);
961	if (!ev_is_active (w))	1429	if (!ev_is_active (w))
962	return;	1430	return;
963		1431
964	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1432	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
965	ev_stop ((W)w);	1433	ev_stop (EV_A_ (W)w);
966		1434
967	if (!signals [w->signum - 1].head)	1435	if (!signals [w->signum - 1].head)
968	signal (w->signum, SIG_DFL);	1436	signal (w->signum, SIG_DFL);
969	}	1437	}
970		1438
971	void	1439	void
972	ev_idle_start (struct ev_idle *w)	1440	ev_child_start (EV_P_ struct ev_child *w)
973	{	1441	{
		1442	#if EV_MULTIPLICITY
		1443	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1444	#endif
974	if (ev_is_active (w))	1445	if (ev_is_active (w))
975	return;	1446	return;
976		1447
977	ev_start ((W)w, ++idlecnt);	1448	ev_start (EV_A_ (W)w, 1);
978	array_needsize (idles, idlemax, idlecnt, );	1449	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
979	idles [idlecnt - 1] = w;
980	}	1450	}
981		1451
982	void	1452	void
983	ev_idle_stop (struct ev_idle *w)	1453	ev_child_stop (EV_P_ struct ev_child *w)
984	{	1454	{
985	ev_clear_pending ((W)w);	1455	ev_clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	1456	if (ev_is_active (w))
987	return;	1457	return;
988		1458
989	idles [w->active - 1] = idles [--idlecnt];
990	ev_stop ((W)w);
991	}
992
993	void
994	ev_prepare_start (struct ev_prepare *w)
995	{
996	if (ev_is_active (w))
997	return;
998
999	ev_start ((W)w, ++preparecnt);
1000	array_needsize (prepares, preparemax, preparecnt, );
1001	prepares [preparecnt - 1] = w;
1002	}
1003
1004	void
1005	ev_prepare_stop (struct ev_prepare *w)
1006	{
1007	ev_clear_pending ((W)w);
1008	if (ev_is_active (w))
1009	return;
1010
1011	prepares [w->active - 1] = prepares [--preparecnt];
1012	ev_stop ((W)w);
1013	}
1014
1015	void
1016	ev_check_start (struct ev_check *w)
1017	{
1018	if (ev_is_active (w))
1019	return;
1020
1021	ev_start ((W)w, ++checkcnt);
1022	array_needsize (checks, checkmax, checkcnt, );
1023	checks [checkcnt - 1] = w;
1024	}
1025
1026	void
1027	ev_check_stop (struct ev_check *w)
1028	{
1029	ev_clear_pending ((W)w);
1030	if (ev_is_active (w))
1031	return;
1032
1033	checks [w->active - 1] = checks [--checkcnt];
1034	ev_stop ((W)w);
1035	}
1036
1037	void
1038	ev_child_start (struct ev_child *w)
1039	{
1040	if (ev_is_active (w))
1041	return;
1042
1043	ev_start ((W)w, 1);
1044	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1045	}
1046
1047	void
1048	ev_child_stop (struct ev_child *w)
1049	{
1050	ev_clear_pending ((W)w);
1051	if (ev_is_active (w))
1052	return;
1053
1054	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1459	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1055	ev_stop ((W)w);	1460	ev_stop (EV_A_ (W)w);
1056	}	1461	}
1057		1462
1058	/*****************************************************************************/	1463	/*****************************************************************************/
1059		1464
1060	struct ev_once	1465	struct ev_once
…		…
1064	void (*cb)(int revents, void *arg);	1469	void (*cb)(int revents, void *arg);
1065	void *arg;	1470	void *arg;
1066	};	1471	};
1067		1472
1068	static void	1473	static void
1069	once_cb (struct ev_once *once, int revents)	1474	once_cb (EV_P_ struct ev_once *once, int revents)
1070	{	1475	{
1071	void (*cb)(int revents, void *arg) = once->cb;	1476	void (*cb)(int revents, void *arg) = once->cb;
1072	void *arg = once->arg;	1477	void *arg = once->arg;
1073		1478
1074	ev_io_stop (&once->io);	1479	ev_io_stop (EV_A_ &once->io);
1075	ev_timer_stop (&once->to);	1480	ev_timer_stop (EV_A_ &once->to);
1076	free (once);	1481	ev_free (once);
1077		1482
1078	cb (revents, arg);	1483	cb (revents, arg);
1079	}	1484	}
1080		1485
1081	static void	1486	static void
1082	once_cb_io (struct ev_io *w, int revents)	1487	once_cb_io (EV_P_ struct ev_io *w, int revents)
1083	{	1488	{
1084	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1489	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1085	}	1490	}
1086		1491
1087	static void	1492	static void
1088	once_cb_to (struct ev_timer *w, int revents)	1493	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1089	{	1494	{
1090	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1495	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1091	}	1496	}
1092		1497
1093	void	1498	void
1094	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1499	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1095	{	1500	{
1096	struct ev_once *once = malloc (sizeof (struct ev_once));	1501	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1097		1502
1098	if (!once)	1503	if (!once)
1099	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1504	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1100	else	1505	else
1101	{	1506	{
…		…
1104		1509
1105	ev_watcher_init (&once->io, once_cb_io);	1510	ev_watcher_init (&once->io, once_cb_io);
1106	if (fd >= 0)	1511	if (fd >= 0)
1107	{	1512	{
1108	ev_io_set (&once->io, fd, events);	1513	ev_io_set (&once->io, fd, events);
1109	ev_io_start (&once->io);	1514	ev_io_start (EV_A_ &once->io);
1110	}	1515	}
1111		1516
1112	ev_watcher_init (&once->to, once_cb_to);	1517	ev_watcher_init (&once->to, once_cb_to);
1113	if (timeout >= 0.)	1518	if (timeout >= 0.)
1114	{	1519	{
1115	ev_timer_set (&once->to, timeout, 0.);	1520	ev_timer_set (&once->to, timeout, 0.);
1116	ev_timer_start (&once->to);	1521	ev_timer_start (EV_A_ &once->to);
1117	}	1522	}
1118	}	1523	}
1119	}	1524	}
1120		1525
1121	/*****************************************************************************/
1122
1123	#if 0
1124
1125	struct ev_io wio;
1126
1127	static void
1128	sin_cb (struct ev_io *w, int revents)
1129	{
1130	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1131	}
1132
1133	static void
1134	ocb (struct ev_timer *w, int revents)
1135	{
1136	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1137	ev_timer_stop (w);
1138	ev_timer_start (w);
1139	}
1140
1141	static void
1142	scb (struct ev_signal *w, int revents)
1143	{
1144	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1145	ev_io_stop (&wio);
1146	ev_io_start (&wio);
1147	}
1148
1149	static void
1150	gcb (struct ev_signal *w, int revents)
1151	{
1152	fprintf (stderr, "generic %x\n", revents);
1153
1154	}
1155
1156	int main (void)
1157	{
1158	ev_init (0);
1159
1160	ev_io_init (&wio, sin_cb, 0, EV_READ);
1161	ev_io_start (&wio);
1162
1163	struct ev_timer t[10000];
1164
1165	#if 0
1166	int i;
1167	for (i = 0; i < 10000; ++i)
1168	{
1169	struct ev_timer *w = t + i;
1170	ev_watcher_init (w, ocb, i);
1171	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1172	ev_timer_start (w);
1173	if (drand48 () < 0.5)
1174	ev_timer_stop (w);
1175	}
1176	#endif
1177
1178	struct ev_timer t1;
1179	ev_timer_init (&t1, ocb, 5, 10);
1180	ev_timer_start (&t1);
1181
1182	struct ev_signal sig;
1183	ev_signal_init (&sig, scb, SIGQUIT);
1184	ev_signal_start (&sig);
1185
1186	struct ev_check cw;
1187	ev_check_init (&cw, gcb);
1188	ev_check_start (&cw);
1189
1190	struct ev_idle iw;
1191	ev_idle_init (&iw, gcb);
1192	ev_idle_start (&iw);
1193
1194	ev_loop (0);
1195
1196	return 0;
1197	}
1198
1199	#endif
1200
1201
1202
1203

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