[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.38 by root, Thu Nov 1 15:21:13 2007 UTC vs.
Revision 1.71 by root, Tue Nov 6 13:17:55 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>
		68
		69	#ifndef PERL
		70	# include <signal.h>
		71	#endif
		72
		73	#ifndef WIN32
		74	# include <unistd.h>
		75	# include <sys/time.h>
		76	# include <sys/wait.h>
		77	#endif
		78	/**/
50		79
51	#ifndef EV_USE_MONOTONIC	80	#ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 1	81	# define EV_USE_MONOTONIC 1
53	#endif	82	#endif
		83
		84	#ifndef EV_USE_SELECT
		85	# define EV_USE_SELECT 1
		86	#endif
		87
		88	#ifndef EV_USE_POLL
		89	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		90	#endif
		91
		92	#ifndef EV_USE_EPOLL
		93	# define EV_USE_EPOLL 0
		94	#endif
		95
		96	#ifndef EV_USE_KQUEUE
		97	# define EV_USE_KQUEUE 0
		98	#endif
		99
		100	#ifndef EV_USE_WIN32
		101	# ifdef WIN32
		102	# define EV_USE_WIN32 0 /* it does not exist, use select */
		103	# undef EV_USE_SELECT
		104	# define EV_USE_SELECT 1
		105	# else
		106	# define EV_USE_WIN32 0
		107	# endif
		108	#endif
		109
		110	#ifndef EV_USE_REALTIME
		111	# define EV_USE_REALTIME 1
		112	#endif
		113
		114	/**/
54		115
55	#ifndef CLOCK_MONOTONIC	116	#ifndef CLOCK_MONOTONIC
56	# undef EV_USE_MONOTONIC	117	# undef EV_USE_MONOTONIC
57	# define EV_USE_MONOTONIC 0	118	# define EV_USE_MONOTONIC 0
58	#endif	119	#endif
59		120
60	#ifndef EV_USE_SELECT
61	# define EV_USE_SELECT 1
62	#endif
63
64	#ifndef EV_USE_EPOLL
65	# define EV_USE_EPOLL 0
66	#endif
67
68	#ifndef CLOCK_REALTIME	121	#ifndef CLOCK_REALTIME
		122	# undef EV_USE_REALTIME
69	# define EV_USE_REALTIME 0	123	# define EV_USE_REALTIME 0
70	#endif	124	#endif
71	#ifndef EV_USE_REALTIME	125
72	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	126	/**/
73	#endif
74		127
75	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	128	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
76	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	129	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
77	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	130	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
78	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	131	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
79		132
80	#include "ev.h"	133	#include "ev.h"
		134
		135	#if __GNUC__ >= 3
		136	# define expect(expr,value) __builtin_expect ((expr),(value))
		137	# define inline inline
		138	#else
		139	# define expect(expr,value) (expr)
		140	# define inline static
		141	#endif
		142
		143	#define expect_false(expr) expect ((expr) != 0, 0)
		144	#define expect_true(expr) expect ((expr) != 0, 1)
		145
		146	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		147	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
81		148
82	typedef struct ev_watcher *W;	149	typedef struct ev_watcher *W;
83	typedef struct ev_watcher_list *WL;	150	typedef struct ev_watcher_list *WL;
84	typedef struct ev_watcher_time *WT;	151	typedef struct ev_watcher_time *WT;
85		152
86	static ev_tstamp now, diff; /* monotonic clock */	153	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
87	ev_tstamp ev_now;
88	int ev_method;
89		154
90	static int have_monotonic; /* runtime */	155	#if WIN32
91		156	/* note: the comment below could not be substantiated, but what would I care */
92	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	157	/* MSDN says this is required to handle SIGFPE */
93	static void (*method_modify)(int fd, int oev, int nev);	158	volatile double SIGFPE_REQ = 0.0f;
94	static void (*method_poll)(ev_tstamp timeout);	159	#endif
95		160
96	/*****************************************************************************/	161	/*****************************************************************************/
97		162
98	ev_tstamp	163	static void (syserr_cb)(const char msg);
		164
		165	void ev_set_syserr_cb (void (cb)(const char msg))
		166	{
		167	syserr_cb = cb;
		168	}
		169
		170	static void
		171	syserr (const char *msg)
		172	{
		173	if (!msg)
		174	msg = "(libev) system error";
		175
		176	if (syserr_cb)
		177	syserr_cb (msg);
		178	else
		179	{
		180	perror (msg);
		181	abort ();
		182	}
		183	}
		184
		185	static void (alloc)(void *ptr, long size);
		186
		187	void ev_set_allocator (void (cb)(void *ptr, long size))
		188	{
		189	alloc = cb;
		190	}
		191
		192	static void *
		193	ev_realloc (void *ptr, long size)
		194	{
		195	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		196
		197	if (!ptr && size)
		198	{
		199	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		200	abort ();
		201	}
		202
		203	return ptr;
		204	}
		205
		206	#define ev_malloc(size) ev_realloc (0, (size))
		207	#define ev_free(ptr) ev_realloc ((ptr), 0)
		208
		209	/*****************************************************************************/
		210
		211	typedef struct
		212	{
		213	WL head;
		214	unsigned char events;
		215	unsigned char reify;
		216	} ANFD;
		217
		218	typedef struct
		219	{
		220	W w;
		221	int events;
		222	} ANPENDING;
		223
		224	#if EV_MULTIPLICITY
		225
		226	struct ev_loop
		227	{
		228	# define VAR(name,decl) decl;
		229	# include "ev_vars.h"
		230	};
		231	# undef VAR
		232	# include "ev_wrap.h"
		233
		234	#else
		235
		236	# define VAR(name,decl) static decl;
		237	# include "ev_vars.h"
		238	# undef VAR
		239
		240	#endif
		241
		242	/*****************************************************************************/
		243
		244	inline ev_tstamp
99	ev_time (void)	245	ev_time (void)
100	{	246	{
101	#if EV_USE_REALTIME	247	#if EV_USE_REALTIME
102	struct timespec ts;	248	struct timespec ts;
103	clock_gettime (CLOCK_REALTIME, &ts);	249	clock_gettime (CLOCK_REALTIME, &ts);
…		…
107	gettimeofday (&tv, 0);	253	gettimeofday (&tv, 0);
108	return tv.tv_sec + tv.tv_usec * 1e-6;	254	return tv.tv_sec + tv.tv_usec * 1e-6;
109	#endif	255	#endif
110	}	256	}
111		257
112	static ev_tstamp	258	inline ev_tstamp
113	get_clock (void)	259	get_clock (void)
114	{	260	{
115	#if EV_USE_MONOTONIC	261	#if EV_USE_MONOTONIC
116	if (have_monotonic)	262	if (expect_true (have_monotonic))
117	{	263	{
118	struct timespec ts;	264	struct timespec ts;
119	clock_gettime (CLOCK_MONOTONIC, &ts);	265	clock_gettime (CLOCK_MONOTONIC, &ts);
120	return ts.tv_sec + ts.tv_nsec * 1e-9;	266	return ts.tv_sec + ts.tv_nsec * 1e-9;
121	}	267	}
122	#endif	268	#endif
123		269
124	return ev_time ();	270	return ev_time ();
125	}	271	}
126		272
		273	ev_tstamp
		274	ev_now (EV_P)
		275	{
		276	return rt_now;
		277	}
		278
127	#define array_roundsize(base,n) ((n) \| 4 & ~3)	279	#define array_roundsize(base,n) ((n) \| 4 & ~3)
128		280
129	#define array_needsize(base,cur,cnt,init) \	281	#define array_needsize(base,cur,cnt,init) \
130	if ((cnt) > cur) \	282	if (expect_false ((cnt) > cur)) \
131	{ \	283	{ \
132	int newcnt = cur; \	284	int newcnt = cur; \
133	do \	285	do \
134	{ \	286	{ \
135	newcnt = array_roundsize (base, newcnt << 1); \	287	newcnt = array_roundsize (base, newcnt << 1); \
136	} \	288	} \
137	while ((cnt) > newcnt); \	289	while ((cnt) > newcnt); \
138	\	290	\
139	base = realloc (base, sizeof (base) (newcnt)); \	291	base = ev_realloc (base, sizeof (base) (newcnt)); \
140	init (base + cur, newcnt - cur); \	292	init (base + cur, newcnt - cur); \
141	cur = newcnt; \	293	cur = newcnt; \
142	}	294	}
		295
		296	#define array_slim(stem) \
		297	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		298	{ \
		299	stem ## max = array_roundsize (stem ## cnt >> 1); \
		300	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		301	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		302	}
		303
		304	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		305	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		306	#define array_free_microshit(stem) \
		307	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		308
		309	#define array_free(stem, idx) \
		310	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
143		311
144	/*****************************************************************************/	312	/*****************************************************************************/
145
146	typedef struct
147	{
148	struct ev_io *head;
149	unsigned char events;
150	unsigned char reify;
151	} ANFD;
152
153	static ANFD *anfds;
154	static int anfdmax;
155		313
156	static void	314	static void
157	anfds_init (ANFD *base, int count)	315	anfds_init (ANFD *base, int count)
158	{	316	{
159	while (count--)	317	while (count--)
…		…
164		322
165	++base;	323	++base;
166	}	324	}
167	}	325	}
168		326
169	typedef struct
170	{
171	W w;
172	int events;
173	} ANPENDING;
174
175	static ANPENDING *pendings;
176	static int pendingmax, pendingcnt;
177
178	static void	327	static void
179	event (W w, int events)	328	event (EV_P_ W w, int events)
180	{	329	{
181	if (w->pending)	330	if (w->pending)
182	{	331	{
183	pendings [w->pending - 1].events \|= events;	332	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
184	return;	333	return;
185	}	334	}
186		335
187	w->pending = ++pendingcnt;	336	w->pending = ++pendingcnt [ABSPRI (w)];
188	array_needsize (pendings, pendingmax, pendingcnt, );	337	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
189	pendings [pendingcnt - 1].w = w;	338	pendings [ABSPRI (w)][w->pending - 1].w = w;
190	pendings [pendingcnt - 1].events = events;	339	pendings [ABSPRI (w)][w->pending - 1].events = events;
191	}	340	}
192		341
193	static void	342	static void
194	queue_events (W *events, int eventcnt, int type)	343	queue_events (EV_P_ W *events, int eventcnt, int type)
195	{	344	{
196	int i;	345	int i;
197		346
198	for (i = 0; i < eventcnt; ++i)	347	for (i = 0; i < eventcnt; ++i)
199	event (events [i], type);	348	event (EV_A_ events [i], type);
200	}	349	}
201		350
202	static void	351	static void
203	fd_event (int fd, int events)	352	fd_event (EV_P_ int fd, int events)
204	{	353	{
205	ANFD *anfd = anfds + fd;	354	ANFD *anfd = anfds + fd;
206	struct ev_io *w;	355	struct ev_io *w;
207		356
208	for (w = anfd->head; w; w = w->next)	357	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
209	{	358	{
210	int ev = w->events & events;	359	int ev = w->events & events;
211		360
212	if (ev)	361	if (ev)
213	event ((W)w, ev);	362	event (EV_A_ (W)w, ev);
214	}	363	}
215	}	364	}
216		365
217	/*****************************************************************************/	366	/*****************************************************************************/
218		367
219	static int *fdchanges;
220	static int fdchangemax, fdchangecnt;
221
222	static void	368	static void
223	fd_reify (void)	369	fd_reify (EV_P)
224	{	370	{
225	int i;	371	int i;
226		372
227	for (i = 0; i < fdchangecnt; ++i)	373	for (i = 0; i < fdchangecnt; ++i)
228	{	374	{
…		…
230	ANFD *anfd = anfds + fd;	376	ANFD *anfd = anfds + fd;
231	struct ev_io *w;	377	struct ev_io *w;
232		378
233	int events = 0;	379	int events = 0;
234		380
235	for (w = anfd->head; w; w = w->next)	381	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
236	events \|= w->events;	382	events \|= w->events;
237		383
238	anfd->reify = 0;	384	anfd->reify = 0;
239		385
240	if (anfd->events != events)
241	{
242	method_modify (fd, anfd->events, events);	386	method_modify (EV_A_ fd, anfd->events, events);
243	anfd->events = events;	387	anfd->events = events;
244	}
245	}	388	}
246		389
247	fdchangecnt = 0;	390	fdchangecnt = 0;
248	}	391	}
249		392
250	static void	393	static void
251	fd_change (int fd)	394	fd_change (EV_P_ int fd)
252	{	395	{
253	if (anfds [fd].reify \|\| fdchangecnt < 0)	396	if (anfds [fd].reify)
254	return;	397	return;
255		398
256	anfds [fd].reify = 1;	399	anfds [fd].reify = 1;
257		400
258	++fdchangecnt;	401	++fdchangecnt;
259	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	402	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
260	fdchanges [fdchangecnt - 1] = fd;	403	fdchanges [fdchangecnt - 1] = fd;
261	}	404	}
262		405
		406	static void
		407	fd_kill (EV_P_ int fd)
		408	{
		409	struct ev_io *w;
		410
		411	while ((w = (struct ev_io *)anfds [fd].head))
		412	{
		413	ev_io_stop (EV_A_ w);
		414	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		415	}
		416	}
		417
		418	static int
		419	fd_valid (int fd)
		420	{
		421	#ifdef WIN32
		422	return !!win32_get_osfhandle (fd);
		423	#else
		424	return fcntl (fd, F_GETFD) != -1;
		425	#endif
		426	}
		427
263	/* called on EBADF to verify fds */	428	/* called on EBADF to verify fds */
264	static void	429	static void
265	fd_recheck (void)	430	fd_ebadf (EV_P)
266	{	431	{
267	int fd;	432	int fd;
268		433
269	for (fd = 0; fd < anfdmax; ++fd)	434	for (fd = 0; fd < anfdmax; ++fd)
270	if (anfds [fd].events)	435	if (anfds [fd].events)
271	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	436	if (!fd_valid (fd) == -1 && errno == EBADF)
272	while (anfds [fd].head)	437	fd_kill (EV_A_ fd);
		438	}
		439
		440	/* called on ENOMEM in select/poll to kill some fds and retry */
		441	static void
		442	fd_enomem (EV_P)
		443	{
		444	int fd;
		445
		446	for (fd = anfdmax; fd--; )
		447	if (anfds [fd].events)
273	{	448	{
274	ev_io_stop (anfds [fd].head);	449	fd_kill (EV_A_ fd);
275	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	450	return;
276	}	451	}
		452	}
		453
		454	/* usually called after fork if method needs to re-arm all fds from scratch */
		455	static void
		456	fd_rearm_all (EV_P)
		457	{
		458	int fd;
		459
		460	/* this should be highly optimised to not do anything but set a flag */
		461	for (fd = 0; fd < anfdmax; ++fd)
		462	if (anfds [fd].events)
		463	{
		464	anfds [fd].events = 0;
		465	fd_change (EV_A_ fd);
		466	}
277	}	467	}
278		468
279	/*****************************************************************************/	469	/*****************************************************************************/
280		470
281	static struct ev_timer **timers;
282	static int timermax, timercnt;
283
284	static struct ev_periodic **periodics;
285	static int periodicmax, periodiccnt;
286
287	static void	471	static void
288	upheap (WT *timers, int k)	472	upheap (WT *heap, int k)
289	{	473	{
290	WT w = timers [k];	474	WT w = heap [k];
291		475
292	while (k && timers [k >> 1]->at > w->at)	476	while (k && heap [k >> 1]->at > w->at)
293	{	477	{
294	timers [k] = timers [k >> 1];	478	heap [k] = heap [k >> 1];
295	timers [k]->active = k + 1;	479	((W)heap [k])->active = k + 1;
296	k >>= 1;	480	k >>= 1;
297	}	481	}
298		482
299	timers [k] = w;	483	heap [k] = w;
300	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
301		485
302	}	486	}
303		487
304	static void	488	static void
305	downheap (WT *timers, int N, int k)	489	downheap (WT *heap, int N, int k)
306	{	490	{
307	WT w = timers [k];	491	WT w = heap [k];
308		492
309	while (k < (N >> 1))	493	while (k < (N >> 1))
310	{	494	{
311	int j = k << 1;	495	int j = k << 1;
312		496
313	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	497	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
314	++j;	498	++j;
315		499
316	if (w->at <= timers [j]->at)	500	if (w->at <= heap [j]->at)
317	break;	501	break;
318		502
319	timers [k] = timers [j];	503	heap [k] = heap [j];
320	timers [k]->active = k + 1;	504	((W)heap [k])->active = k + 1;
321	k = j;	505	k = j;
322	}	506	}
323		507
324	timers [k] = w;	508	heap [k] = w;
325	timers [k]->active = k + 1;	509	((W)heap [k])->active = k + 1;
326	}	510	}
327		511
328	/*****************************************************************************/	512	/*****************************************************************************/
329		513
330	typedef struct	514	typedef struct
331	{	515	{
332	struct ev_signal *head;	516	WL head;
333	sig_atomic_t volatile gotsig;	517	sig_atomic_t volatile gotsig;
334	} ANSIG;	518	} ANSIG;
335		519
336	static ANSIG *signals;	520	static ANSIG *signals;
337	static int signalmax;	521	static int signalmax;
…		…
353	}	537	}
354		538
355	static void	539	static void
356	sighandler (int signum)	540	sighandler (int signum)
357	{	541	{
		542	#if WIN32
		543	signal (signum, sighandler);
		544	#endif
		545
358	signals [signum - 1].gotsig = 1;	546	signals [signum - 1].gotsig = 1;
359		547
360	if (!gotsig)	548	if (!gotsig)
361	{	549	{
		550	int old_errno = errno;
362	gotsig = 1;	551	gotsig = 1;
363	write (sigpipe [1], &signum, 1);	552	write (sigpipe [1], &signum, 1);
		553	errno = old_errno;
364	}	554	}
365	}	555	}
366		556
367	static void	557	static void
368	sigcb (struct ev_io *iow, int revents)	558	sigcb (EV_P_ struct ev_io *iow, int revents)
369	{	559	{
370	struct ev_signal *w;	560	WL w;
371	int signum;	561	int signum;
372		562
373	read (sigpipe [0], &revents, 1);	563	read (sigpipe [0], &revents, 1);
374	gotsig = 0;	564	gotsig = 0;
375		565
…		…
377	if (signals [signum].gotsig)	567	if (signals [signum].gotsig)
378	{	568	{
379	signals [signum].gotsig = 0;	569	signals [signum].gotsig = 0;
380		570
381	for (w = signals [signum].head; w; w = w->next)	571	for (w = signals [signum].head; w; w = w->next)
382	event ((W)w, EV_SIGNAL);	572	event (EV_A_ (W)w, EV_SIGNAL);
383	}	573	}
384	}	574	}
385		575
386	static void	576	static void
387	siginit (void)	577	siginit (EV_P)
388	{	578	{
		579	#ifndef WIN32
389	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	580	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	581	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391		582
392	/* rather than sort out wether we really need nb, set it */	583	/* rather than sort out wether we really need nb, set it */
393	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	584	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	585	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		586	#endif
395		587
396	ev_io_set (&sigev, sigpipe [0], EV_READ);	588	ev_io_set (&sigev, sigpipe [0], EV_READ);
397	ev_io_start (&sigev);	589	ev_io_start (EV_A_ &sigev);
		590	ev_unref (EV_A); /* child watcher should not keep loop alive */
398	}	591	}
399		592
400	/*****************************************************************************/	593	/*****************************************************************************/
401		594
402	static struct ev_idle **idles;
403	static int idlemax, idlecnt;
404
405	static struct ev_prepare **prepares;
406	static int preparemax, preparecnt;
407
408	static struct ev_check **checks;
409	static int checkmax, checkcnt;
410
411	/*****************************************************************************/
412
413	static struct ev_child *childs [PID_HASHSIZE];	595	static struct ev_child *childs [PID_HASHSIZE];
		596
		597	#ifndef WIN32
		598
414	static struct ev_signal childev;	599	static struct ev_signal childev;
415		600
416	#ifndef WCONTINUED	601	#ifndef WCONTINUED
417	# define WCONTINUED 0	602	# define WCONTINUED 0
418	#endif	603	#endif
419		604
420	static void	605	static void
421	childcb (struct ev_signal *sw, int revents)	606	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
422	{	607	{
423	struct ev_child *w;	608	struct ev_child *w;
		609
		610	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		611	if (w->pid == pid \|\| !w->pid)
		612	{
		613	ev_priority (w) = ev_priority (sw); /* need to do it now */
		614	w->rpid = pid;
		615	w->rstatus = status;
		616	event (EV_A_ (W)w, EV_CHILD);
		617	}
		618	}
		619
		620	static void
		621	childcb (EV_P_ struct ev_signal *sw, int revents)
		622	{
424	int pid, status;	623	int pid, status;
425		624
426	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	625	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
427	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	626	{
428	if (w->pid == pid \|\| w->pid == -1)	627	/* make sure we are called again until all childs have been reaped */
429	{	628	event (EV_A_ (W)sw, EV_SIGNAL);
430	w->status = status;	629
431	event ((W)w, EV_CHILD);	630	child_reap (EV_A_ sw, pid, pid, status);
432	}	631	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		632	}
433	}	633	}
		634
		635	#endif
434		636
435	/*****************************************************************************/	637	/*****************************************************************************/
436		638
		639	#if EV_USE_KQUEUE
		640	# include "ev_kqueue.c"
		641	#endif
437	#if EV_USE_EPOLL	642	#if EV_USE_EPOLL
438	# include "ev_epoll.c"	643	# include "ev_epoll.c"
439	#endif	644	#endif
		645	#if EV_USE_POLL
		646	# include "ev_poll.c"
		647	#endif
440	#if EV_USE_SELECT	648	#if EV_USE_SELECT
441	# include "ev_select.c"	649	# include "ev_select.c"
442	#endif	650	#endif
443		651
444	int	652	int
…		…
451	ev_version_minor (void)	659	ev_version_minor (void)
452	{	660	{
453	return EV_VERSION_MINOR;	661	return EV_VERSION_MINOR;
454	}	662	}
455		663
456	int ev_init (int flags)	664	/* return true if we are running with elevated privileges and should ignore env variables */
		665	static int
		666	enable_secure (void)
457	{	667	{
		668	#ifdef WIN32
		669	return 0;
		670	#else
		671	return getuid () != geteuid ()
		672	\|\| getgid () != getegid ();
		673	#endif
		674	}
		675
		676	int
		677	ev_method (EV_P)
		678	{
		679	return method;
		680	}
		681
		682	static void
		683	loop_init (EV_P_ int methods)
		684	{
458	if (!ev_method)	685	if (!method)
459	{	686	{
460	#if EV_USE_MONOTONIC	687	#if EV_USE_MONOTONIC
461	{	688	{
462	struct timespec ts;	689	struct timespec ts;
463	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	690	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
464	have_monotonic = 1;	691	have_monotonic = 1;
465	}	692	}
466	#endif	693	#endif
467		694
468	ev_now = ev_time ();	695	rt_now = ev_time ();
469	now = get_clock ();	696	mn_now = get_clock ();
		697	now_floor = mn_now;
470	diff = ev_now - now;	698	rtmn_diff = rt_now - mn_now;
471		699
472	if (pipe (sigpipe))	700	if (methods == EVMETHOD_AUTO)
473	return 0;	701	if (!enable_secure () && getenv ("LIBEV_METHODS"))
474		702	methods = atoi (getenv ("LIBEV_METHODS"));
		703	else
475	ev_method = EVMETHOD_NONE;	704	methods = EVMETHOD_ANY;
		705
		706	method = 0;
		707	#if EV_USE_WIN32
		708	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		709	#endif
		710	#if EV_USE_KQUEUE
		711	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		712	#endif
476	#if EV_USE_EPOLL	713	#if EV_USE_EPOLL
477	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	714	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		715	#endif
		716	#if EV_USE_POLL
		717	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
478	#endif	718	#endif
479	#if EV_USE_SELECT	719	#if EV_USE_SELECT
480	if (ev_method == EVMETHOD_NONE) select_init (flags);	720	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
481	#endif	721	#endif
482		722
		723	ev_watcher_init (&sigev, sigcb);
		724	ev_set_priority (&sigev, EV_MAXPRI);
		725	}
		726	}
		727
		728	void
		729	loop_destroy (EV_P)
		730	{
		731	int i;
		732
		733	#if EV_USE_WIN32
		734	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		735	#endif
		736	#if EV_USE_KQUEUE
		737	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		738	#endif
		739	#if EV_USE_EPOLL
		740	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		741	#endif
		742	#if EV_USE_POLL
		743	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		744	#endif
		745	#if EV_USE_SELECT
		746	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		747	#endif
		748
		749	for (i = NUMPRI; i--; )
		750	array_free (pending, [i]);
		751
		752	/* have to use the microsoft-never-gets-it-right macro */
		753	array_free_microshit (fdchange);
		754	array_free_microshit (timer);
		755	array_free_microshit (periodic);
		756	array_free_microshit (idle);
		757	array_free_microshit (prepare);
		758	array_free_microshit (check);
		759
		760	method = 0;
		761	}
		762
		763	static void
		764	loop_fork (EV_P)
		765	{
		766	#if EV_USE_EPOLL
		767	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		768	#endif
		769	#if EV_USE_KQUEUE
		770	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		771	#endif
		772
		773	if (ev_is_active (&sigev))
		774	{
		775	/* default loop */
		776
		777	ev_ref (EV_A);
		778	ev_io_stop (EV_A_ &sigev);
		779	close (sigpipe [0]);
		780	close (sigpipe [1]);
		781
		782	while (pipe (sigpipe))
		783	syserr ("(libev) error creating pipe");
		784
		785	siginit (EV_A);
		786	}
		787
		788	postfork = 0;
		789	}
		790
		791	#if EV_MULTIPLICITY
		792	struct ev_loop *
		793	ev_loop_new (int methods)
		794	{
		795	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		796
		797	memset (loop, 0, sizeof (struct ev_loop));
		798
		799	loop_init (EV_A_ methods);
		800
		801	if (ev_method (EV_A))
		802	return loop;
		803
		804	return 0;
		805	}
		806
		807	void
		808	ev_loop_destroy (EV_P)
		809	{
		810	loop_destroy (EV_A);
		811	ev_free (loop);
		812	}
		813
		814	void
		815	ev_loop_fork (EV_P)
		816	{
		817	postfork = 1;
		818	}
		819
		820	#endif
		821
		822	#if EV_MULTIPLICITY
		823	struct ev_loop default_loop_struct;
		824	static struct ev_loop *default_loop;
		825
		826	struct ev_loop *
		827	#else
		828	static int default_loop;
		829
		830	int
		831	#endif
		832	ev_default_loop (int methods)
		833	{
		834	if (sigpipe [0] == sigpipe [1])
		835	if (pipe (sigpipe))
		836	return 0;
		837
		838	if (!default_loop)
		839	{
		840	#if EV_MULTIPLICITY
		841	struct ev_loop *loop = default_loop = &default_loop_struct;
		842	#else
		843	default_loop = 1;
		844	#endif
		845
		846	loop_init (EV_A_ methods);
		847
483	if (ev_method)	848	if (ev_method (EV_A))
484	{	849	{
485	ev_watcher_init (&sigev, sigcb);
486	siginit ();	850	siginit (EV_A);
487		851
		852	#ifndef WIN32
488	ev_signal_init (&childev, childcb, SIGCHLD);	853	ev_signal_init (&childev, childcb, SIGCHLD);
		854	ev_set_priority (&childev, EV_MAXPRI);
489	ev_signal_start (&childev);	855	ev_signal_start (EV_A_ &childev);
		856	ev_unref (EV_A); /* child watcher should not keep loop alive */
		857	#endif
490	}	858	}
		859	else
		860	default_loop = 0;
491	}	861	}
492		862
493	return ev_method;	863	return default_loop;
		864	}
		865
		866	void
		867	ev_default_destroy (void)
		868	{
		869	#if EV_MULTIPLICITY
		870	struct ev_loop *loop = default_loop;
		871	#endif
		872
		873	#ifndef WIN32
		874	ev_ref (EV_A); /* child watcher */
		875	ev_signal_stop (EV_A_ &childev);
		876	#endif
		877
		878	ev_ref (EV_A); /* signal watcher */
		879	ev_io_stop (EV_A_ &sigev);
		880
		881	close (sigpipe [0]); sigpipe [0] = 0;
		882	close (sigpipe [1]); sigpipe [1] = 0;
		883
		884	loop_destroy (EV_A);
		885	}
		886
		887	void
		888	ev_default_fork (void)
		889	{
		890	#if EV_MULTIPLICITY
		891	struct ev_loop *loop = default_loop;
		892	#endif
		893
		894	if (method)
		895	postfork = 1;
494	}	896	}
495		897
496	/*****************************************************************************/	898	/*****************************************************************************/
497		899
498	void
499	ev_fork_prepare (void)
500	{
501	/* nop */
502	}
503
504	void
505	ev_fork_parent (void)
506	{
507	/* nop */
508	}
509
510	void
511	ev_fork_child (void)
512	{
513	#if EV_USE_EPOLL
514	if (ev_method == EVMETHOD_EPOLL)
515	epoll_postfork_child ();
516	#endif
517
518	ev_io_stop (&sigev);
519	close (sigpipe [0]);
520	close (sigpipe [1]);
521	pipe (sigpipe);
522	siginit ();
523	}
524
525	/*****************************************************************************/
526
527	static void	900	static void
528	call_pending (void)	901	call_pending (EV_P)
529	{	902	{
		903	int pri;
		904
		905	for (pri = NUMPRI; pri--; )
530	while (pendingcnt)	906	while (pendingcnt [pri])
531	{	907	{
532	ANPENDING *p = pendings + --pendingcnt;	908	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
533		909
534	if (p->w)	910	if (p->w)
535	{	911	{
536	p->w->pending = 0;	912	p->w->pending = 0;
537	p->w->cb (p->w, p->events);	913	p->w->cb (EV_A_ p->w, p->events);
538	}	914	}
539	}	915	}
540	}	916	}
541		917
542	static void	918	static void
543	timers_reify (void)	919	timers_reify (EV_P)
544	{	920	{
545	while (timercnt && timers [0]->at <= now)	921	while (timercnt && ((WT)timers [0])->at <= mn_now)
546	{	922	{
547	struct ev_timer *w = timers [0];	923	struct ev_timer *w = timers [0];
		924
		925	assert (("inactive timer on timer heap detected", ev_is_active (w)));
548		926
549	/* first reschedule or stop timer */	927	/* first reschedule or stop timer */
550	if (w->repeat)	928	if (w->repeat)
551	{	929	{
552	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	930	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
553	w->at = now + w->repeat;	931	((WT)w)->at = mn_now + w->repeat;
554	downheap ((WT *)timers, timercnt, 0);	932	downheap ((WT *)timers, timercnt, 0);
555	}	933	}
556	else	934	else
557	ev_timer_stop (w); /* nonrepeating: stop timer */	935	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
558		936
559	event ((W)w, EV_TIMEOUT);	937	event (EV_A_ (W)w, EV_TIMEOUT);
560	}	938	}
561	}	939	}
562		940
563	static void	941	static void
564	periodics_reify (void)	942	periodics_reify (EV_P)
565	{	943	{
566	while (periodiccnt && periodics [0]->at <= ev_now)	944	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
567	{	945	{
568	struct ev_periodic *w = periodics [0];	946	struct ev_periodic *w = periodics [0];
		947
		948	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
569		949
570	/* first reschedule or stop timer */	950	/* first reschedule or stop timer */
571	if (w->interval)	951	if (w->interval)
572	{	952	{
573	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	953	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
574	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	954	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
575	downheap ((WT *)periodics, periodiccnt, 0);	955	downheap ((WT *)periodics, periodiccnt, 0);
576	}	956	}
577	else	957	else
578	ev_periodic_stop (w); /* nonrepeating: stop timer */	958	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
579		959
580	event ((W)w, EV_PERIODIC);	960	event (EV_A_ (W)w, EV_PERIODIC);
581	}	961	}
582	}	962	}
583		963
584	static void	964	static void
585	periodics_reschedule (ev_tstamp diff)	965	periodics_reschedule (EV_P)
586	{	966	{
587	int i;	967	int i;
588		968
589	/* adjust periodics after time jump */	969	/* adjust periodics after time jump */
590	for (i = 0; i < periodiccnt; ++i)	970	for (i = 0; i < periodiccnt; ++i)
591	{	971	{
592	struct ev_periodic *w = periodics [i];	972	struct ev_periodic *w = periodics [i];
593		973
594	if (w->interval)	974	if (w->interval)
595	{	975	{
596	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	976	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
597		977
598	if (fabs (diff) >= 1e-4)	978	if (fabs (diff) >= 1e-4)
599	{	979	{
600	ev_periodic_stop (w);	980	ev_periodic_stop (EV_A_ w);
601	ev_periodic_start (w);	981	ev_periodic_start (EV_A_ w);
602		982
603	i = 0; /* restart loop, inefficient, but time jumps should be rare */	983	i = 0; /* restart loop, inefficient, but time jumps should be rare */
604	}	984	}
605	}	985	}
606	}	986	}
607	}	987	}
608		988
		989	inline int
		990	time_update_monotonic (EV_P)
		991	{
		992	mn_now = get_clock ();
		993
		994	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		995	{
		996	rt_now = rtmn_diff + mn_now;
		997	return 0;
		998	}
		999	else
		1000	{
		1001	now_floor = mn_now;
		1002	rt_now = ev_time ();
		1003	return 1;
		1004	}
		1005	}
		1006
609	static void	1007	static void
610	time_update (void)	1008	time_update (EV_P)
611	{	1009	{
612	int i;	1010	int i;
613		1011
614	ev_now = ev_time ();	1012	#if EV_USE_MONOTONIC
615
616	if (have_monotonic)	1013	if (expect_true (have_monotonic))
617	{	1014	{
618	ev_tstamp odiff = diff;	1015	if (time_update_monotonic (EV_A))
619
620	for (i = 4; --i; ) /* loop a few times, before making important decisions */
621	{	1016	{
622	now = get_clock ();	1017	ev_tstamp odiff = rtmn_diff;
		1018
		1019	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1020	{
623	diff = ev_now - now;	1021	rtmn_diff = rt_now - mn_now;
624		1022
625	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1023	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
626	return; /* all is well */	1024	return; /* all is well */
627		1025
628	ev_now = ev_time ();	1026	rt_now = ev_time ();
		1027	mn_now = get_clock ();
		1028	now_floor = mn_now;
		1029	}
		1030
		1031	periodics_reschedule (EV_A);
		1032	/* no timer adjustment, as the monotonic clock doesn't jump */
		1033	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
629	}	1034	}
630
631	periodics_reschedule (diff - odiff);
632	/* no timer adjustment, as the monotonic clock doesn't jump */
633	}	1035	}
634	else	1036	else
		1037	#endif
635	{	1038	{
636	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1039	rt_now = ev_time ();
		1040
		1041	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
637	{	1042	{
638	periodics_reschedule (ev_now - now);	1043	periodics_reschedule (EV_A);
639		1044
640	/* adjust timers. this is easy, as the offset is the same for all */	1045	/* adjust timers. this is easy, as the offset is the same for all */
641	for (i = 0; i < timercnt; ++i)	1046	for (i = 0; i < timercnt; ++i)
642	timers [i]->at += diff;	1047	((WT)timers [i])->at += rt_now - mn_now;
643	}	1048	}
644		1049
645	now = ev_now;	1050	mn_now = rt_now;
646	}	1051	}
647	}	1052	}
648		1053
649	int ev_loop_done;	1054	void
		1055	ev_ref (EV_P)
		1056	{
		1057	++activecnt;
		1058	}
650		1059
		1060	void
		1061	ev_unref (EV_P)
		1062	{
		1063	--activecnt;
		1064	}
		1065
		1066	static int loop_done;
		1067
		1068	void
651	void ev_loop (int flags)	1069	ev_loop (EV_P_ int flags)
652	{	1070	{
653	double block;	1071	double block;
654	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1072	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
655		1073
656	do	1074	do
657	{	1075	{
658	/* queue check watchers (and execute them) */	1076	/* queue check watchers (and execute them) */
659	if (preparecnt)	1077	if (expect_false (preparecnt))
660	{	1078	{
661	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1079	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662	call_pending ();	1080	call_pending (EV_A);
663	}	1081	}
664		1082
		1083	/* we might have forked, so reify kernel state if necessary */
		1084	if (expect_false (postfork))
		1085	loop_fork (EV_A);
		1086
665	/* update fd-related kernel structures */	1087	/* update fd-related kernel structures */
666	fd_reify ();	1088	fd_reify (EV_A);
667		1089
668	/* calculate blocking time */	1090	/* calculate blocking time */
669		1091
670	/* we only need this for !monotonic clockor timers, but as we basically	1092	/* we only need this for !monotonic clockor timers, but as we basically
671	always have timers, we just calculate it always */	1093	always have timers, we just calculate it always */
		1094	#if EV_USE_MONOTONIC
		1095	if (expect_true (have_monotonic))
		1096	time_update_monotonic (EV_A);
		1097	else
		1098	#endif
		1099	{
672	ev_now = ev_time ();	1100	rt_now = ev_time ();
		1101	mn_now = rt_now;
		1102	}
673		1103
674	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1104	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
675	block = 0.;	1105	block = 0.;
676	else	1106	else
677	{	1107	{
678	block = MAX_BLOCKTIME;	1108	block = MAX_BLOCKTIME;
679		1109
680	if (timercnt)	1110	if (timercnt)
681	{	1111	{
682	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1112	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
683	if (block > to) block = to;	1113	if (block > to) block = to;
684	}	1114	}
685		1115
686	if (periodiccnt)	1116	if (periodiccnt)
687	{	1117	{
688	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1118	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
689	if (block > to) block = to;	1119	if (block > to) block = to;
690	}	1120	}
691		1121
692	if (block < 0.) block = 0.;	1122	if (block < 0.) block = 0.;
693	}	1123	}
694		1124
695	method_poll (block);	1125	method_poll (EV_A_ block);
696		1126
697	/* update ev_now, do magic */	1127	/* update rt_now, do magic */
698	time_update ();	1128	time_update (EV_A);
699		1129
700	/* queue pending timers and reschedule them */	1130	/* queue pending timers and reschedule them */
701	timers_reify (); /* relative timers called last */	1131	timers_reify (EV_A); /* relative timers called last */
702	periodics_reify (); /* absolute timers called first */	1132	periodics_reify (EV_A); /* absolute timers called first */
703		1133
704	/* queue idle watchers unless io or timers are pending */	1134	/* queue idle watchers unless io or timers are pending */
705	if (!pendingcnt)	1135	if (!pendingcnt)
706	queue_events ((W *)idles, idlecnt, EV_IDLE);	1136	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
707		1137
708	/* queue check watchers, to be executed first */	1138	/* queue check watchers, to be executed first */
709	if (checkcnt)	1139	if (checkcnt)
710	queue_events ((W *)checks, checkcnt, EV_CHECK);	1140	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711		1141
712	call_pending ();	1142	call_pending (EV_A);
713	}	1143	}
714	while (!ev_loop_done);	1144	while (activecnt && !loop_done);
715		1145
716	if (ev_loop_done != 2)	1146	if (loop_done != 2)
717	ev_loop_done = 0;	1147	loop_done = 0;
		1148	}
		1149
		1150	void
		1151	ev_unloop (EV_P_ int how)
		1152	{
		1153	loop_done = how;
718	}	1154	}
719		1155
720	/*****************************************************************************/	1156	/*****************************************************************************/
721		1157
722	static void	1158	inline void
723	wlist_add (WL *head, WL elem)	1159	wlist_add (WL *head, WL elem)
724	{	1160	{
725	elem->next = *head;	1161	elem->next = *head;
726	*head = elem;	1162	*head = elem;
727	}	1163	}
728		1164
729	static void	1165	inline void
730	wlist_del (WL *head, WL elem)	1166	wlist_del (WL *head, WL elem)
731	{	1167	{
732	while (*head)	1168	while (*head)
733	{	1169	{
734	if (*head == elem)	1170	if (*head == elem)
…		…
739		1175
740	head = &(*head)->next;	1176	head = &(*head)->next;
741	}	1177	}
742	}	1178	}
743		1179
744	static void	1180	inline void
745	ev_clear_pending (W w)	1181	ev_clear_pending (EV_P_ W w)
746	{	1182	{
747	if (w->pending)	1183	if (w->pending)
748	{	1184	{
749	pendings [w->pending - 1].w = 0;	1185	pendings [ABSPRI (w)][w->pending - 1].w = 0;
750	w->pending = 0;	1186	w->pending = 0;
751	}	1187	}
752	}	1188	}
753		1189
754	static void	1190	inline void
755	ev_start (W w, int active)	1191	ev_start (EV_P_ W w, int active)
756	{	1192	{
		1193	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1194	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1195
757	w->active = active;	1196	w->active = active;
		1197	ev_ref (EV_A);
758	}	1198	}
759		1199
760	static void	1200	inline void
761	ev_stop (W w)	1201	ev_stop (EV_P_ W w)
762	{	1202	{
		1203	ev_unref (EV_A);
763	w->active = 0;	1204	w->active = 0;
764	}	1205	}
765		1206
766	/*****************************************************************************/	1207	/*****************************************************************************/
767		1208
768	void	1209	void
769	ev_io_start (struct ev_io *w)	1210	ev_io_start (EV_P_ struct ev_io *w)
770	{	1211	{
771	int fd = w->fd;	1212	int fd = w->fd;
772		1213
773	if (ev_is_active (w))	1214	if (ev_is_active (w))
774	return;	1215	return;
775		1216
776	assert (("ev_io_start called with negative fd", fd >= 0));	1217	assert (("ev_io_start called with negative fd", fd >= 0));
777		1218
778	ev_start ((W)w, 1);	1219	ev_start (EV_A_ (W)w, 1);
779	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1220	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
780	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1221	wlist_add ((WL *)&anfds[fd].head, (WL)w);
781		1222
782	fd_change (fd);	1223	fd_change (EV_A_ fd);
783	}	1224	}
784		1225
785	void	1226	void
786	ev_io_stop (struct ev_io *w)	1227	ev_io_stop (EV_P_ struct ev_io *w)
787	{	1228	{
788	ev_clear_pending ((W)w);	1229	ev_clear_pending (EV_A_ (W)w);
789	if (!ev_is_active (w))	1230	if (!ev_is_active (w))
790	return;	1231	return;
791		1232
792	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1233	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
793	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
794		1235
795	fd_change (w->fd);	1236	fd_change (EV_A_ w->fd);
796	}	1237	}
797		1238
798	void	1239	void
799	ev_timer_start (struct ev_timer *w)	1240	ev_timer_start (EV_P_ struct ev_timer *w)
800	{	1241	{
801	if (ev_is_active (w))	1242	if (ev_is_active (w))
802	return;	1243	return;
803		1244
804	w->at += now;	1245	((WT)w)->at += mn_now;
805		1246
806	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1247	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807		1248
808	ev_start ((W)w, ++timercnt);	1249	ev_start (EV_A_ (W)w, ++timercnt);
809	array_needsize (timers, timermax, timercnt, );	1250	array_needsize (timers, timermax, timercnt, (void));
810	timers [timercnt - 1] = w;	1251	timers [timercnt - 1] = w;
811	upheap ((WT *)timers, timercnt - 1);	1252	upheap ((WT *)timers, timercnt - 1);
812	}
813		1253
		1254	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1255	}
		1256
814	void	1257	void
815	ev_timer_stop (struct ev_timer *w)	1258	ev_timer_stop (EV_P_ struct ev_timer *w)
816	{	1259	{
817	ev_clear_pending ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
818	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
819	return;	1262	return;
820		1263
		1264	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1265
821	if (w->active < timercnt--)	1266	if (((W)w)->active < timercnt--)
822	{	1267	{
823	timers [w->active - 1] = timers [timercnt];	1268	timers [((W)w)->active - 1] = timers [timercnt];
824	downheap ((WT *)timers, timercnt, w->active - 1);	1269	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
825	}	1270	}
826		1271
827	w->at = w->repeat;	1272	((WT)w)->at = w->repeat;
828		1273
829	ev_stop ((W)w);	1274	ev_stop (EV_A_ (W)w);
830	}	1275	}
831		1276
832	void	1277	void
833	ev_timer_again (struct ev_timer *w)	1278	ev_timer_again (EV_P_ struct ev_timer *w)
834	{	1279	{
835	if (ev_is_active (w))	1280	if (ev_is_active (w))
836	{	1281	{
837	if (w->repeat)	1282	if (w->repeat)
838	{	1283	{
839	w->at = now + w->repeat;	1284	((WT)w)->at = mn_now + w->repeat;
840	downheap ((WT *)timers, timercnt, w->active - 1);	1285	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
841	}	1286	}
842	else	1287	else
843	ev_timer_stop (w);	1288	ev_timer_stop (EV_A_ w);
844	}	1289	}
845	else if (w->repeat)	1290	else if (w->repeat)
846	ev_timer_start (w);	1291	ev_timer_start (EV_A_ w);
847	}	1292	}
848		1293
849	void	1294	void
850	ev_periodic_start (struct ev_periodic *w)	1295	ev_periodic_start (EV_P_ struct ev_periodic *w)
851	{	1296	{
852	if (ev_is_active (w))	1297	if (ev_is_active (w))
853	return;	1298	return;
854		1299
855	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1300	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
856		1301
857	/* this formula differs from the one in periodic_reify because we do not always round up */	1302	/* this formula differs from the one in periodic_reify because we do not always round up */
858	if (w->interval)	1303	if (w->interval)
859	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1304	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
860		1305
861	ev_start ((W)w, ++periodiccnt);	1306	ev_start (EV_A_ (W)w, ++periodiccnt);
862	array_needsize (periodics, periodicmax, periodiccnt, );	1307	array_needsize (periodics, periodicmax, periodiccnt, (void));
863	periodics [periodiccnt - 1] = w;	1308	periodics [periodiccnt - 1] = w;
864	upheap ((WT *)periodics, periodiccnt - 1);	1309	upheap ((WT *)periodics, periodiccnt - 1);
865	}
866		1310
		1311	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1312	}
		1313
867	void	1314	void
868	ev_periodic_stop (struct ev_periodic *w)	1315	ev_periodic_stop (EV_P_ struct ev_periodic *w)
869	{	1316	{
870	ev_clear_pending ((W)w);	1317	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1318	if (!ev_is_active (w))
872	return;	1319	return;
873		1320
		1321	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1322
874	if (w->active < periodiccnt--)	1323	if (((W)w)->active < periodiccnt--)
875	{	1324	{
876	periodics [w->active - 1] = periodics [periodiccnt];	1325	periodics [((W)w)->active - 1] = periodics [periodiccnt];
877	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1326	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
878	}	1327	}
879		1328
880	ev_stop ((W)w);	1329	ev_stop (EV_A_ (W)w);
881	}	1330	}
882		1331
883	void	1332	void
884	ev_signal_start (struct ev_signal *w)	1333	ev_idle_start (EV_P_ struct ev_idle *w)
885	{	1334	{
886	if (ev_is_active (w))	1335	if (ev_is_active (w))
887	return;	1336	return;
888		1337
		1338	ev_start (EV_A_ (W)w, ++idlecnt);
		1339	array_needsize (idles, idlemax, idlecnt, (void));
		1340	idles [idlecnt - 1] = w;
		1341	}
		1342
		1343	void
		1344	ev_idle_stop (EV_P_ struct ev_idle *w)
		1345	{
		1346	ev_clear_pending (EV_A_ (W)w);
		1347	if (ev_is_active (w))
		1348	return;
		1349
		1350	idles [((W)w)->active - 1] = idles [--idlecnt];
		1351	ev_stop (EV_A_ (W)w);
		1352	}
		1353
		1354	void
		1355	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1356	{
		1357	if (ev_is_active (w))
		1358	return;
		1359
		1360	ev_start (EV_A_ (W)w, ++preparecnt);
		1361	array_needsize (prepares, preparemax, preparecnt, (void));
		1362	prepares [preparecnt - 1] = w;
		1363	}
		1364
		1365	void
		1366	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1367	{
		1368	ev_clear_pending (EV_A_ (W)w);
		1369	if (ev_is_active (w))
		1370	return;
		1371
		1372	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1373	ev_stop (EV_A_ (W)w);
		1374	}
		1375
		1376	void
		1377	ev_check_start (EV_P_ struct ev_check *w)
		1378	{
		1379	if (ev_is_active (w))
		1380	return;
		1381
		1382	ev_start (EV_A_ (W)w, ++checkcnt);
		1383	array_needsize (checks, checkmax, checkcnt, (void));
		1384	checks [checkcnt - 1] = w;
		1385	}
		1386
		1387	void
		1388	ev_check_stop (EV_P_ struct ev_check *w)
		1389	{
		1390	ev_clear_pending (EV_A_ (W)w);
		1391	if (ev_is_active (w))
		1392	return;
		1393
		1394	checks [((W)w)->active - 1] = checks [--checkcnt];
		1395	ev_stop (EV_A_ (W)w);
		1396	}
		1397
		1398	#ifndef SA_RESTART
		1399	# define SA_RESTART 0
		1400	#endif
		1401
		1402	void
		1403	ev_signal_start (EV_P_ struct ev_signal *w)
		1404	{
		1405	#if EV_MULTIPLICITY
		1406	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1407	#endif
		1408	if (ev_is_active (w))
		1409	return;
		1410
889	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1411	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
890		1412
891	ev_start ((W)w, 1);	1413	ev_start (EV_A_ (W)w, 1);
892	array_needsize (signals, signalmax, w->signum, signals_init);	1414	array_needsize (signals, signalmax, w->signum, signals_init);
893	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1415	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
894		1416
895	if (!w->next)	1417	if (!((WL)w)->next)
896	{	1418	{
		1419	#if WIN32
		1420	signal (w->signum, sighandler);
		1421	#else
897	struct sigaction sa;	1422	struct sigaction sa;
898	sa.sa_handler = sighandler;	1423	sa.sa_handler = sighandler;
899	sigfillset (&sa.sa_mask);	1424	sigfillset (&sa.sa_mask);
900	sa.sa_flags = 0;	1425	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901	sigaction (w->signum, &sa, 0);	1426	sigaction (w->signum, &sa, 0);
		1427	#endif
902	}	1428	}
903	}	1429	}
904		1430
905	void	1431	void
906	ev_signal_stop (struct ev_signal *w)	1432	ev_signal_stop (EV_P_ struct ev_signal *w)
907	{	1433	{
908	ev_clear_pending ((W)w);	1434	ev_clear_pending (EV_A_ (W)w);
909	if (!ev_is_active (w))	1435	if (!ev_is_active (w))
910	return;	1436	return;
911		1437
912	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1438	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
913	ev_stop ((W)w);	1439	ev_stop (EV_A_ (W)w);
914		1440
915	if (!signals [w->signum - 1].head)	1441	if (!signals [w->signum - 1].head)
916	signal (w->signum, SIG_DFL);	1442	signal (w->signum, SIG_DFL);
917	}	1443	}
918		1444
919	void	1445	void
920	ev_idle_start (struct ev_idle *w)	1446	ev_child_start (EV_P_ struct ev_child *w)
921	{	1447	{
		1448	#if EV_MULTIPLICITY
		1449	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1450	#endif
922	if (ev_is_active (w))	1451	if (ev_is_active (w))
923	return;	1452	return;
924		1453
925	ev_start ((W)w, ++idlecnt);	1454	ev_start (EV_A_ (W)w, 1);
926	array_needsize (idles, idlemax, idlecnt, );	1455	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
927	idles [idlecnt - 1] = w;
928	}	1456	}
929		1457
930	void	1458	void
931	ev_idle_stop (struct ev_idle *w)	1459	ev_child_stop (EV_P_ struct ev_child *w)
932	{	1460	{
933	ev_clear_pending ((W)w);	1461	ev_clear_pending (EV_A_ (W)w);
934	if (ev_is_active (w))	1462	if (ev_is_active (w))
935	return;	1463	return;
936		1464
937	idles [w->active - 1] = idles [--idlecnt];
938	ev_stop ((W)w);
939	}
940
941	void
942	ev_prepare_start (struct ev_prepare *w)
943	{
944	if (ev_is_active (w))
945	return;
946
947	ev_start ((W)w, ++preparecnt);
948	array_needsize (prepares, preparemax, preparecnt, );
949	prepares [preparecnt - 1] = w;
950	}
951
952	void
953	ev_prepare_stop (struct ev_prepare *w)
954	{
955	ev_clear_pending ((W)w);
956	if (ev_is_active (w))
957	return;
958
959	prepares [w->active - 1] = prepares [--preparecnt];
960	ev_stop ((W)w);
961	}
962
963	void
964	ev_check_start (struct ev_check *w)
965	{
966	if (ev_is_active (w))
967	return;
968
969	ev_start ((W)w, ++checkcnt);
970	array_needsize (checks, checkmax, checkcnt, );
971	checks [checkcnt - 1] = w;
972	}
973
974	void
975	ev_check_stop (struct ev_check *w)
976	{
977	ev_clear_pending ((W)w);
978	if (ev_is_active (w))
979	return;
980
981	checks [w->active - 1] = checks [--checkcnt];
982	ev_stop ((W)w);
983	}
984
985	void
986	ev_child_start (struct ev_child *w)
987	{
988	if (ev_is_active (w))
989	return;
990
991	ev_start ((W)w, 1);
992	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
993	}
994
995	void
996	ev_child_stop (struct ev_child *w)
997	{
998	ev_clear_pending ((W)w);
999	if (ev_is_active (w))
1000	return;
1001
1002	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1465	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1003	ev_stop ((W)w);	1466	ev_stop (EV_A_ (W)w);
1004	}	1467	}
1005		1468
1006	/*****************************************************************************/	1469	/*****************************************************************************/
1007		1470
1008	struct ev_once	1471	struct ev_once
…		…
1012	void (cb)(int revents, void arg);	1475	void (cb)(int revents, void arg);
1013	void *arg;	1476	void *arg;
1014	};	1477	};
1015		1478
1016	static void	1479	static void
1017	once_cb (struct ev_once *once, int revents)	1480	once_cb (EV_P_ struct ev_once *once, int revents)
1018	{	1481	{
1019	void (cb)(int revents, void arg) = once->cb;	1482	void (cb)(int revents, void arg) = once->cb;
1020	void *arg = once->arg;	1483	void *arg = once->arg;
1021		1484
1022	ev_io_stop (&once->io);	1485	ev_io_stop (EV_A_ &once->io);
1023	ev_timer_stop (&once->to);	1486	ev_timer_stop (EV_A_ &once->to);
1024	free (once);	1487	ev_free (once);
1025		1488
1026	cb (revents, arg);	1489	cb (revents, arg);
1027	}	1490	}
1028		1491
1029	static void	1492	static void
1030	once_cb_io (struct ev_io *w, int revents)	1493	once_cb_io (EV_P_ struct ev_io *w, int revents)
1031	{	1494	{
1032	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1495	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1033	}	1496	}
1034		1497
1035	static void	1498	static void
1036	once_cb_to (struct ev_timer *w, int revents)	1499	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1037	{	1500	{
1038	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1501	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1039	}	1502	}
1040		1503
1041	void	1504	void
1042	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1505	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1043	{	1506	{
1044	struct ev_once *once = malloc (sizeof (struct ev_once));	1507	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1045		1508
1046	if (!once)	1509	if (!once)
1047	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1510	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1048	else	1511	else
1049	{	1512	{
…		…
1052		1515
1053	ev_watcher_init (&once->io, once_cb_io);	1516	ev_watcher_init (&once->io, once_cb_io);
1054	if (fd >= 0)	1517	if (fd >= 0)
1055	{	1518	{
1056	ev_io_set (&once->io, fd, events);	1519	ev_io_set (&once->io, fd, events);
1057	ev_io_start (&once->io);	1520	ev_io_start (EV_A_ &once->io);
1058	}	1521	}
1059		1522
1060	ev_watcher_init (&once->to, once_cb_to);	1523	ev_watcher_init (&once->to, once_cb_to);
1061	if (timeout >= 0.)	1524	if (timeout >= 0.)
1062	{	1525	{
1063	ev_timer_set (&once->to, timeout, 0.);	1526	ev_timer_set (&once->to, timeout, 0.);
1064	ev_timer_start (&once->to);	1527	ev_timer_start (EV_A_ &once->to);
1065	}	1528	}
1066	}	1529	}
1067	}	1530	}
1068		1531
1069	/*****************************************************************************/
1070
1071	#if 0
1072
1073	struct ev_io wio;
1074
1075	static void
1076	sin_cb (struct ev_io *w, int revents)
1077	{
1078	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1079	}
1080
1081	static void
1082	ocb (struct ev_timer *w, int revents)
1083	{
1084	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1085	ev_timer_stop (w);
1086	ev_timer_start (w);
1087	}
1088
1089	static void
1090	scb (struct ev_signal *w, int revents)
1091	{
1092	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1093	ev_io_stop (&wio);
1094	ev_io_start (&wio);
1095	}
1096
1097	static void
1098	gcb (struct ev_signal *w, int revents)
1099	{
1100	fprintf (stderr, "generic %x\n", revents);
1101
1102	}
1103
1104	int main (void)
1105	{
1106	ev_init (0);
1107
1108	ev_io_init (&wio, sin_cb, 0, EV_READ);
1109	ev_io_start (&wio);
1110
1111	struct ev_timer t[10000];
1112
1113	#if 0
1114	int i;
1115	for (i = 0; i < 10000; ++i)
1116	{
1117	struct ev_timer *w = t + i;
1118	ev_watcher_init (w, ocb, i);
1119	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1120	ev_timer_start (w);
1121	if (drand48 () < 0.5)
1122	ev_timer_stop (w);
1123	}
1124	#endif
1125
1126	struct ev_timer t1;
1127	ev_timer_init (&t1, ocb, 5, 10);
1128	ev_timer_start (&t1);
1129
1130	struct ev_signal sig;
1131	ev_signal_init (&sig, scb, SIGQUIT);
1132	ev_signal_start (&sig);
1133
1134	struct ev_check cw;
1135	ev_check_init (&cw, gcb);
1136	ev_check_start (&cw);
1137
1138	struct ev_idle iw;
1139	ev_idle_init (&iw, gcb);
1140	ev_idle_start (&iw);
1141
1142	ev_loop (0);
1143
1144	return 0;
1145	}
1146
1147	#endif
1148
1149
1150
1151

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Comparing libev/ev.c (file contents): Revision 1.38 by root, Thu Nov 1 15:21:13 2007 UTC vs. Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.38 by root, Thu Nov 1 15:21:13 2007 UTC vs.
Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC