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Comparing libev/ev.c (file contents):
Revision 1.65 by root, Sun Nov 4 23:29:48 2007 UTC vs.
Revision 1.146 by root, Tue Nov 27 09:17:51 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
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
31	#ifndef EV_STANDALONE	36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
32	# include "config.h"	40	# include "config.h"
		41	# endif
33		42
34	# if HAVE_CLOCK_GETTIME	43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
35	# define EV_USE_MONOTONIC 1	45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
36	# define EV_USE_REALTIME 1	48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
37	# endif	57	# endif
38		58
		59	# ifndef EV_USE_SELECT
39	# if HAVE_SELECT && HAVE_SYS_SELECT_H	60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
40	# define EV_USE_SELECT 1	61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
41	# endif	65	# endif
42		66
		67	# ifndef EV_USE_POLL
43	# if HAVE_POLL && HAVE_POLL_H	68	# if HAVE_POLL && HAVE_POLL_H
44	# define EV_USE_POLL 1	69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
45	# endif	73	# endif
46		74
		75	# ifndef EV_USE_EPOLL
47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
48	# define EV_USE_EPOLL 1	77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
49	# endif	81	# endif
50		82
		83	# ifndef EV_USE_KQUEUE
51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
52	# define EV_USE_KQUEUE 1	85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
53	# endif	97	# endif
54		98
55	#endif	99	#endif
56		100
57	#include <math.h>	101	#include <math.h>
58	#include <stdlib.h>	102	#include <stdlib.h>
59	#include <unistd.h>
60	#include <fcntl.h>	103	#include <fcntl.h>
61	#include <signal.h>
62	#include <stddef.h>	104	#include <stddef.h>
63		105
64	#include <stdio.h>	106	#include <stdio.h>
65		107
66	#include <assert.h>	108	#include <assert.h>
67	#include <errno.h>	109	#include <errno.h>
68	#include <sys/types.h>	110	#include <sys/types.h>
		111	#include <time.h>
		112
		113	#include <signal.h>
		114
69	#ifndef WIN32	115	#ifndef _WIN32
		116	# include <sys/time.h>
70	# include <sys/wait.h>	117	# include <sys/wait.h>
		118	# include <unistd.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
71	#endif	124	# endif
72	#include <sys/time.h>	125	#endif
73	#include <time.h>
74		126
75	/**/	127	/**/
76		128
77	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
78	# define EV_USE_MONOTONIC 1	130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
79	#endif	135	#endif
80		136
81	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
82	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
83	#endif	139	#endif
84		140
85	#ifndef EV_USE_POLL	141	#ifndef EV_USE_POLL
86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
87	#endif	147	#endif
88		148
89	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
90	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
91	#endif	151	#endif
92		152
93	#ifndef EV_USE_KQUEUE	153	#ifndef EV_USE_KQUEUE
94	# define EV_USE_KQUEUE 0	154	# define EV_USE_KQUEUE 0
95	#endif	155	#endif
96		156
97	#ifndef EV_USE_WIN32
98	# ifdef WIN32
99	# define EV_USE_WIN32 1
100	# else
101	# define EV_USE_WIN32 0
102	# endif
103	#endif
104
105	#ifndef EV_USE_REALTIME	157	#ifndef EV_USE_PORT
106	# define EV_USE_REALTIME 1	158	# define EV_USE_PORT 0
107	#endif	159	#endif
108		160
109	/**/	161	/**/
110		162
111	#ifndef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
…		…
116	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
117	# undef EV_USE_REALTIME	169	# undef EV_USE_REALTIME
118	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
119	#endif	171	#endif
120		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
121	/**/	177	/**/
122		178
123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
127		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
128	#include "ev.h"	187	# include "ev.h"
		188	#endif
129		189
130	#if __GNUC__ >= 3	190	#if __GNUC__ >= 3
131	# define expect(expr,value) __builtin_expect ((expr),(value))	191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline_size static inline /* inline for codesize */
		193	# if EV_MINIMAL
132	# define inline inline	194	# define noinline __attribute__ ((noinline))
		195	# define inline_speed static noinline
		196	# else
		197	# define noinline
		198	# define inline_speed static inline
		199	# endif
133	#else	200	#else
134	# define expect(expr,value) (expr)	201	# define expect(expr,value) (expr)
		202	# define inline_speed static
135	# define inline static	203	# define inline_size static
		204	# define noinline
136	#endif	205	#endif
137		206
138	#define expect_false(expr) expect ((expr) != 0, 0)	207	#define expect_false(expr) expect ((expr) != 0, 0)
139	#define expect_true(expr) expect ((expr) != 0, 1)	208	#define expect_true(expr) expect ((expr) != 0, 1)
140		209
141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
143		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
144	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
145	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
146	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
147		219
148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
149		221
		222	#ifdef _WIN32
		223	# include "ev_win32.c"
		224	#endif
		225
150	/*****************************************************************************/	226	/*****************************************************************************/
151		227
		228	static void (*syserr_cb)(const char *msg);
		229
		230	void
		231	ev_set_syserr_cb (void (*cb)(const char *msg))
		232	{
		233	syserr_cb = cb;
		234	}
		235
		236	static void noinline
		237	syserr (const char *msg)
		238	{
		239	if (!msg)
		240	msg = "(libev) system error";
		241
		242	if (syserr_cb)
		243	syserr_cb (msg);
		244	else
		245	{
		246	perror (msg);
		247	abort ();
		248	}
		249	}
		250
		251	static void *(*alloc)(void *ptr, long size);
		252
		253	void
		254	ev_set_allocator (void *(*cb)(void *ptr, long size))
		255	{
		256	alloc = cb;
		257	}
		258
		259	static void *
		260	ev_realloc (void *ptr, long size)
		261	{
		262	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		263
		264	if (!ptr && size)
		265	{
		266	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		267	abort ();
		268	}
		269
		270	return ptr;
		271	}
		272
		273	#define ev_malloc(size) ev_realloc (0, (size))
		274	#define ev_free(ptr) ev_realloc ((ptr), 0)
		275
		276	/*****************************************************************************/
		277
152	typedef struct	278	typedef struct
153	{	279	{
154	struct ev_watcher_list *head;	280	WL head;
155	unsigned char events;	281	unsigned char events;
156	unsigned char reify;	282	unsigned char reify;
		283	#if EV_SELECT_IS_WINSOCKET
		284	SOCKET handle;
		285	#endif
157	} ANFD;	286	} ANFD;
158		287
159	typedef struct	288	typedef struct
160	{	289	{
161	W w;	290	W w;
162	int events;	291	int events;
163	} ANPENDING;	292	} ANPENDING;
164		293
165	#if EV_MULTIPLICITY	294	#if EV_MULTIPLICITY
166		295
167	struct ev_loop	296	struct ev_loop
168	{	297	{
		298	ev_tstamp ev_rt_now;
		299	#define ev_rt_now ((loop)->ev_rt_now)
169	# define VAR(name,decl) decl;	300	#define VAR(name,decl) decl;
170	# include "ev_vars.h"	301	#include "ev_vars.h"
171	};
172	# undef VAR	302	#undef VAR
		303	};
173	# include "ev_wrap.h"	304	#include "ev_wrap.h"
		305
		306	static struct ev_loop default_loop_struct;
		307	struct ev_loop *ev_default_loop_ptr;
174		308
175	#else	309	#else
176		310
		311	ev_tstamp ev_rt_now;
177	# define VAR(name,decl) static decl;	312	#define VAR(name,decl) static decl;
178	# include "ev_vars.h"	313	#include "ev_vars.h"
179	# undef VAR	314	#undef VAR
		315
		316	static int ev_default_loop_ptr;
180		317
181	#endif	318	#endif
182		319
183	/*****************************************************************************/	320	/*****************************************************************************/
184		321
185	inline ev_tstamp	322	ev_tstamp
186	ev_time (void)	323	ev_time (void)
187	{	324	{
188	#if EV_USE_REALTIME	325	#if EV_USE_REALTIME
189	struct timespec ts;	326	struct timespec ts;
190	clock_gettime (CLOCK_REALTIME, &ts);	327	clock_gettime (CLOCK_REALTIME, &ts);
…		…
194	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
195	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
196	#endif	333	#endif
197	}	334	}
198		335
199	inline ev_tstamp	336	ev_tstamp inline_size
200	get_clock (void)	337	get_clock (void)
201	{	338	{
202	#if EV_USE_MONOTONIC	339	#if EV_USE_MONOTONIC
203	if (expect_true (have_monotonic))	340	if (expect_true (have_monotonic))
204	{	341	{
…		…
209	#endif	346	#endif
210		347
211	return ev_time ();	348	return ev_time ();
212	}	349	}
213		350
		351	#if EV_MULTIPLICITY
214	ev_tstamp	352	ev_tstamp
215	ev_now (EV_P)	353	ev_now (EV_P)
216	{	354	{
217	return rt_now;	355	return ev_rt_now;
218	}	356	}
		357	#endif
219		358
220	#define array_roundsize(base,n) ((n) | 4 & ~3)	359	#define array_roundsize(type,n) (((n) | 4) & ~3)
221		360
222	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
223	if (expect_false ((cnt) > cur)) \	362	if (expect_false ((cnt) > cur)) \
224	{ \	363	{ \
225	int newcnt = cur; \	364	int newcnt = cur; \
226	do \	365	do \
227	{ \	366	{ \
228	newcnt = array_roundsize (base, newcnt << 1); \	367	newcnt = array_roundsize (type, newcnt << 1); \
229	} \	368	} \
230	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
231	\	370	\
232	base = realloc (base, sizeof (*base) * (newcnt)); \	371	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
233	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
234	cur = newcnt; \	373	cur = newcnt; \
		374	}
		375
		376	#define array_slim(type,stem) \
		377	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		378	{ \
		379	stem ## max = array_roundsize (stem ## cnt >> 1); \
		380	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		381	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
235	}	382	}
236		383
237	#define array_free(stem, idx) \	384	#define array_free(stem, idx) \
238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	385	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
239		386
240	/*****************************************************************************/	387	/*****************************************************************************/
241		388
242	static void	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
		391	{
		392	W w_ = (W)w;
		393
		394	if (expect_false (w_->pending))
		395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		397	return;
		398	}
		399
		400	w_->pending = ++pendingcnt [ABSPRI (w_)];
		401	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		402	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		403	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		404	}
		405
		406	void inline_size
		407	queue_events (EV_P_ W *events, int eventcnt, int type)
		408	{
		409	int i;
		410
		411	for (i = 0; i < eventcnt; ++i)
		412	ev_feed_event (EV_A_ events [i], type);
		413	}
		414
		415	/*****************************************************************************/
		416
		417	void inline_size
243	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
244	{	419	{
245	while (count--)	420	while (count--)
246	{	421	{
247	base->head = 0;	422	base->head = 0;
…		…
250		425
251	++base;	426	++base;
252	}	427	}
253	}	428	}
254		429
255	static void	430	void inline_speed
256	event (EV_P_ W w, int events)
257	{
258	if (w->pending)
259	{
260	pendings [ABSPRI (w)][w->pending - 1].events |= events;
261	return;
262	}
263
264	w->pending = ++pendingcnt [ABSPRI (w)];
265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
266	pendings [ABSPRI (w)][w->pending - 1].w = w;
267	pendings [ABSPRI (w)][w->pending - 1].events = events;
268	}
269
270	static void
271	queue_events (EV_P_ W *events, int eventcnt, int type)
272	{
273	int i;
274
275	for (i = 0; i < eventcnt; ++i)
276	event (EV_A_ events [i], type);
277	}
278
279	static void
280	fd_event (EV_P_ int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
281	{	432	{
282	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
283	struct ev_io *w;	434	ev_io *w;
284		435
285	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	436	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
286	{	437	{
287	int ev = w->events & events;	438	int ev = w->events & revents;
288		439
289	if (ev)	440	if (ev)
290	event (EV_A_ (W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
291	}	442	}
292	}	443	}
293		444
294	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
295		450
296	static void	451	void inline_size
297	fd_reify (EV_P)	452	fd_reify (EV_P)
298	{	453	{
299	int i;	454	int i;
300		455
301	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
302	{	457	{
303	int fd = fdchanges [i];	458	int fd = fdchanges [i];
304	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
305	struct ev_io *w;	460	ev_io *w;
306		461
307	int events = 0;	462	int events = 0;
308		463
309	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	464	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
310	events |= w->events;	465	events |= w->events;
311		466
		467	#if EV_SELECT_IS_WINSOCKET
		468	if (events)
		469	{
		470	unsigned long argp;
		471	anfd->handle = _get_osfhandle (fd);
		472	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		473	}
		474	#endif
		475
312	anfd->reify = 0;	476	anfd->reify = 0;
313		477
314	method_modify (EV_A_ fd, anfd->events, events);	478	backend_modify (EV_A_ fd, anfd->events, events);
315	anfd->events = events;	479	anfd->events = events;
316	}	480	}
317		481
318	fdchangecnt = 0;	482	fdchangecnt = 0;
319	}	483	}
320		484
321	static void	485	void inline_size
322	fd_change (EV_P_ int fd)	486	fd_change (EV_P_ int fd)
323	{	487	{
324	if (anfds [fd].reify || fdchangecnt < 0)	488	if (expect_false (anfds [fd].reify))
325	return;	489	return;
326		490
327	anfds [fd].reify = 1;	491	anfds [fd].reify = 1;
328		492
329	++fdchangecnt;	493	++fdchangecnt;
330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
331	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
332	}	496	}
333		497
334	static void	498	void inline_speed
335	fd_kill (EV_P_ int fd)	499	fd_kill (EV_P_ int fd)
336	{	500	{
337	struct ev_io *w;	501	ev_io *w;
338		502
339	while ((w = (struct ev_io *)anfds [fd].head))	503	while ((w = (ev_io *)anfds [fd].head))
340	{	504	{
341	ev_io_stop (EV_A_ w);	505	ev_io_stop (EV_A_ w);
342	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	506	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
343	}	507	}
		508	}
		509
		510	int inline_size
		511	fd_valid (int fd)
		512	{
		513	#ifdef _WIN32
		514	return _get_osfhandle (fd) != -1;
		515	#else
		516	return fcntl (fd, F_GETFD) != -1;
		517	#endif
344	}	518	}
345		519
346	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
347	static void	521	static void noinline
348	fd_ebadf (EV_P)	522	fd_ebadf (EV_P)
349	{	523	{
350	int fd;	524	int fd;
351		525
352	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
353	if (anfds [fd].events)	527	if (anfds [fd].events)
354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
355	fd_kill (EV_A_ fd);	529	fd_kill (EV_A_ fd);
356	}	530	}
357		531
358	/* called on ENOMEM in select/poll to kill some fds and retry */	532	/* called on ENOMEM in select/poll to kill some fds and retry */
359	static void	533	static void noinline
360	fd_enomem (EV_P)	534	fd_enomem (EV_P)
361	{	535	{
362	int fd;	536	int fd;
363		537
364	for (fd = anfdmax; fd--; )	538	for (fd = anfdmax; fd--; )
365	if (anfds [fd].events)	539	if (anfds [fd].events)
366	{	540	{
367	close (fd);
368	fd_kill (EV_A_ fd);	541	fd_kill (EV_A_ fd);
369	return;	542	return;
370	}	543	}
371	}	544	}
372		545
373	/* susually called after fork if method needs to re-arm all fds from scratch */	546	/* usually called after fork if backend needs to re-arm all fds from scratch */
374	static void	547	static void noinline
375	fd_rearm_all (EV_P)	548	fd_rearm_all (EV_P)
376	{	549	{
377	int fd;	550	int fd;
378		551
379	/* this should be highly optimised to not do anything but set a flag */	552	/* this should be highly optimised to not do anything but set a flag */
…		…
385	}	558	}
386	}	559	}
387		560
388	/*****************************************************************************/	561	/*****************************************************************************/
389		562
390	static void	563	void inline_speed
391	upheap (WT *heap, int k)	564	upheap (WT *heap, int k)
392	{	565	{
393	WT w = heap [k];	566	WT w = heap [k];
394		567
395	while (k && heap [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
…		…
402	heap [k] = w;	575	heap [k] = w;
403	((W)heap [k])->active = k + 1;	576	((W)heap [k])->active = k + 1;
404		577
405	}	578	}
406		579
407	static void	580	void inline_speed
408	downheap (WT *heap, int N, int k)	581	downheap (WT *heap, int N, int k)
409	{	582	{
410	WT w = heap [k];	583	WT w = heap [k];
411		584
412	while (k < (N >> 1))	585	while (k < (N >> 1))
…		…
426		599
427	heap [k] = w;	600	heap [k] = w;
428	((W)heap [k])->active = k + 1;	601	((W)heap [k])->active = k + 1;
429	}	602	}
430		603
		604	void inline_size
		605	adjustheap (WT *heap, int N, int k)
		606	{
		607	upheap (heap, k);
		608	downheap (heap, N, k);
		609	}
		610
431	/*****************************************************************************/	611	/*****************************************************************************/
432		612
433	typedef struct	613	typedef struct
434	{	614	{
435	struct ev_watcher_list *head;	615	WL head;
436	sig_atomic_t volatile gotsig;	616	sig_atomic_t volatile gotsig;
437	} ANSIG;	617	} ANSIG;
438		618
439	static ANSIG *signals;	619	static ANSIG *signals;
440	static int signalmax;	620	static int signalmax;
441		621
442	static int sigpipe [2];	622	static int sigpipe [2];
443	static sig_atomic_t volatile gotsig;	623	static sig_atomic_t volatile gotsig;
444	static struct ev_io sigev;	624	static ev_io sigev;
445		625
446	static void	626	void inline_size
447	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
448	{	628	{
449	while (count--)	629	while (count--)
450	{	630	{
451	base->head = 0;	631	base->head = 0;
…		…
456	}	636	}
457		637
458	static void	638	static void
459	sighandler (int signum)	639	sighandler (int signum)
460	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
461	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
462		646
463	if (!gotsig)	647	if (!gotsig)
464	{	648	{
465	int old_errno = errno;	649	int old_errno = errno;
…		…
467	write (sigpipe [1], &signum, 1);	651	write (sigpipe [1], &signum, 1);
468	errno = old_errno;	652	errno = old_errno;
469	}	653	}
470	}	654	}
471		655
		656	void noinline
		657	ev_feed_signal_event (EV_P_ int signum)
		658	{
		659	WL w;
		660
		661	#if EV_MULTIPLICITY
		662	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		663	#endif
		664
		665	--signum;
		666
		667	if (signum < 0 || signum >= signalmax)
		668	return;
		669
		670	signals [signum].gotsig = 0;
		671
		672	for (w = signals [signum].head; w; w = w->next)
		673	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		674	}
		675
472	static void	676	static void
473	sigcb (EV_P_ struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
474	{	678	{
475	struct ev_watcher_list *w;
476	int signum;	679	int signum;
477		680
478	read (sigpipe [0], &revents, 1);	681	read (sigpipe [0], &revents, 1);
479	gotsig = 0;	682	gotsig = 0;
480		683
481	for (signum = signalmax; signum--; )	684	for (signum = signalmax; signum--; )
482	if (signals [signum].gotsig)	685	if (signals [signum].gotsig)
483	{	686	ev_feed_signal_event (EV_A_ signum + 1);
484	signals [signum].gotsig = 0;
485
486	for (w = signals [signum].head; w; w = w->next)
487	event (EV_A_ (W)w, EV_SIGNAL);
488	}
489	}	687	}
490		688
491	static void	689	void inline_size
		690	fd_intern (int fd)
		691	{
		692	#ifdef _WIN32
		693	int arg = 1;
		694	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		695	#else
		696	fcntl (fd, F_SETFD, FD_CLOEXEC);
		697	fcntl (fd, F_SETFL, O_NONBLOCK);
		698	#endif
		699	}
		700
		701	static void noinline
492	siginit (EV_P)	702	siginit (EV_P)
493	{	703	{
494	#ifndef WIN32	704	fd_intern (sigpipe [0]);
495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	705	fd_intern (sigpipe [1]);
496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
497
498	/* rather than sort out wether we really need nb, set it */
499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
501	#endif
502		706
503	ev_io_set (&sigev, sigpipe [0], EV_READ);	707	ev_io_set (&sigev, sigpipe [0], EV_READ);
504	ev_io_start (EV_A_ &sigev);	708	ev_io_start (EV_A_ &sigev);
505	ev_unref (EV_A); /* child watcher should not keep loop alive */	709	ev_unref (EV_A); /* child watcher should not keep loop alive */
506	}	710	}
507		711
508	/*****************************************************************************/	712	/*****************************************************************************/
509		713
		714	static ev_child *childs [PID_HASHSIZE];
		715
510	#ifndef WIN32	716	#ifndef _WIN32
511		717
512	static struct ev_child *childs [PID_HASHSIZE];
513	static struct ev_signal childev;	718	static ev_signal childev;
514		719
515	#ifndef WCONTINUED	720	void inline_speed
516	# define WCONTINUED 0
517	#endif
518
519	static void
520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)	721	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
521	{	722	{
522	struct ev_child *w;	723	ev_child *w;
523		724
524	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)	725	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
525	if (w->pid == pid || !w->pid)	726	if (w->pid == pid || !w->pid)
526	{	727	{
527	ev_priority (w) = ev_priority (sw); /* need to do it *now* */	728	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
528	w->rpid = pid;	729	w->rpid = pid;
529	w->rstatus = status;	730	w->rstatus = status;
530	event (EV_A_ (W)w, EV_CHILD);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
531	}	732	}
532	}	733	}
533		734
		735	#ifndef WCONTINUED
		736	# define WCONTINUED 0
		737	#endif
		738
534	static void	739	static void
535	childcb (EV_P_ struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
536	{	741	{
537	int pid, status;	742	int pid, status;
538		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
540	{	746	if (!WCONTINUED
		747	|| errno != EINVAL
		748	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		749	return;
		750
541	/* make sure we are called again until all childs have been reaped */	751	/* make sure we are called again until all childs have been reaped */
		752	/* we need to do it this way so that the callback gets called before we continue */
542	event (EV_A_ (W)sw, EV_SIGNAL);	753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
543		754
544	child_reap (EV_A_ sw, pid, pid, status);	755	child_reap (EV_A_ sw, pid, pid, status);
545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
546	}
547	}	757	}
548		758
549	#endif	759	#endif
550		760
551	/*****************************************************************************/	761	/*****************************************************************************/
552		762
		763	#if EV_USE_PORT
		764	# include "ev_port.c"
		765	#endif
553	#if EV_USE_KQUEUE	766	#if EV_USE_KQUEUE
554	# include "ev_kqueue.c"	767	# include "ev_kqueue.c"
555	#endif	768	#endif
556	#if EV_USE_EPOLL	769	#if EV_USE_EPOLL
557	# include "ev_epoll.c"	770	# include "ev_epoll.c"
…		…
574	{	787	{
575	return EV_VERSION_MINOR;	788	return EV_VERSION_MINOR;
576	}	789	}
577		790
578	/* return true if we are running with elevated privileges and should ignore env variables */	791	/* return true if we are running with elevated privileges and should ignore env variables */
579	static int	792	int inline_size
580	enable_secure (void)	793	enable_secure (void)
581	{	794	{
582	#ifdef WIN32	795	#ifdef _WIN32
583	return 0;	796	return 0;
584	#else	797	#else
585	return getuid () != geteuid ()	798	return getuid () != geteuid ()
586	|| getgid () != getegid ();	799	|| getgid () != getegid ();
587	#endif	800	#endif
588	}	801	}
589		802
590	int	803	unsigned int
591	ev_method (EV_P)	804	ev_supported_backends (void)
592	{	805	{
593	return method;	806	unsigned int flags = 0;
		807
		808	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		809	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		810	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		811	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		812	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		813
		814	return flags;
		815	}
		816
		817	unsigned int
		818	ev_recommended_backends (void)
		819	{
		820	unsigned int flags = ev_supported_backends ();
		821
		822	#ifndef __NetBSD__
		823	/* kqueue is borked on everything but netbsd apparently */
		824	/* it usually doesn't work correctly on anything but sockets and pipes */
		825	flags &= ~EVBACKEND_KQUEUE;
		826	#endif
		827	#ifdef __APPLE__
		828	// flags &= ~EVBACKEND_KQUEUE; for documentation
		829	flags &= ~EVBACKEND_POLL;
		830	#endif
		831
		832	return flags;
		833	}
		834
		835	unsigned int
		836	ev_embeddable_backends (void)
		837	{
		838	return EVBACKEND_EPOLL
		839	| EVBACKEND_KQUEUE
		840	| EVBACKEND_PORT;
		841	}
		842
		843	unsigned int
		844	ev_backend (EV_P)
		845	{
		846	return backend;
594	}	847	}
595		848
596	static void	849	static void
597	loop_init (EV_P_ int methods)	850	loop_init (EV_P_ unsigned int flags)
598	{	851	{
599	if (!method)	852	if (!backend)
600	{	853	{
601	#if EV_USE_MONOTONIC	854	#if EV_USE_MONOTONIC
602	{	855	{
603	struct timespec ts;	856	struct timespec ts;
604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
605	have_monotonic = 1;	858	have_monotonic = 1;
606	}	859	}
607	#endif	860	#endif
608		861
609	rt_now = ev_time ();	862	ev_rt_now = ev_time ();
610	mn_now = get_clock ();	863	mn_now = get_clock ();
611	now_floor = mn_now;	864	now_floor = mn_now;
612	rtmn_diff = rt_now - mn_now;	865	rtmn_diff = ev_rt_now - mn_now;
613		866
614	if (methods == EVMETHOD_AUTO)	867	if (!(flags & EVFLAG_NOENV)
615	if (!enable_secure () && getenv ("LIBEV_METHODS"))	868	&& !enable_secure ()
		869	&& getenv ("LIBEV_FLAGS"))
616	methods = atoi (getenv ("LIBEV_METHODS"));	870	flags = atoi (getenv ("LIBEV_FLAGS"));
617	else
618	methods = EVMETHOD_ANY;
619		871
620	method = 0;	872	if (!(flags & 0x0000ffffUL))
621	#if EV_USE_WIN32	873	flags |= ev_recommended_backends ();
622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);	874
		875	backend = 0;
		876	#if EV_USE_PORT
		877	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
623	#endif	878	#endif
624	#if EV_USE_KQUEUE	879	#if EV_USE_KQUEUE
625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
626	#endif	881	#endif
627	#if EV_USE_EPOLL	882	#if EV_USE_EPOLL
628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
629	#endif	884	#endif
630	#if EV_USE_POLL	885	#if EV_USE_POLL
631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
632	#endif	887	#endif
633	#if EV_USE_SELECT	888	#if EV_USE_SELECT
634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
635	#endif	890	#endif
636	}
637	}
638		891
639	void	892	ev_init (&sigev, sigcb);
		893	ev_set_priority (&sigev, EV_MAXPRI);
		894	}
		895	}
		896
		897	static void
640	loop_destroy (EV_P)	898	loop_destroy (EV_P)
641	{	899	{
642	int i;	900	int i;
643		901
644	#if EV_USE_WIN32	902	#if EV_USE_PORT
645	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	903	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
646	#endif	904	#endif
647	#if EV_USE_KQUEUE	905	#if EV_USE_KQUEUE
648	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	906	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
649	#endif	907	#endif
650	#if EV_USE_EPOLL	908	#if EV_USE_EPOLL
651	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	909	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
652	#endif	910	#endif
653	#if EV_USE_POLL	911	#if EV_USE_POLL
654	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	912	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
655	#endif	913	#endif
656	#if EV_USE_SELECT	914	#if EV_USE_SELECT
657	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	915	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
658	#endif	916	#endif
659		917
660	for (i = NUMPRI; i--; )	918	for (i = NUMPRI; i--; )
661	array_free (pending, [i]);	919	array_free (pending, [i]);
662		920
		921	/* have to use the microsoft-never-gets-it-right macro */
663	array_free (fdchange, );	922	array_free (fdchange, EMPTY0);
664	array_free (timer, );	923	array_free (timer, EMPTY0);
		924	#if EV_PERIODIC_ENABLE
665	array_free (periodic, );	925	array_free (periodic, EMPTY0);
		926	#endif
666	array_free (idle, );	927	array_free (idle, EMPTY0);
667	array_free (prepare, );	928	array_free (prepare, EMPTY0);
668	array_free (check, );	929	array_free (check, EMPTY0);
669		930
670	method = 0;	931	backend = 0;
671	/*TODO*/
672	}	932	}
673		933
674	void	934	static void
675	loop_fork (EV_P)	935	loop_fork (EV_P)
676	{	936	{
677	/*TODO*/	937	#if EV_USE_PORT
		938	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		939	#endif
		940	#if EV_USE_KQUEUE
		941	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		942	#endif
678	#if EV_USE_EPOLL	943	#if EV_USE_EPOLL
679	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	944	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
680	#endif	945	#endif
681	#if EV_USE_KQUEUE	946
682	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	947	if (ev_is_active (&sigev))
683	#endif	948	{
		949	/* default loop */
		950
		951	ev_ref (EV_A);
		952	ev_io_stop (EV_A_ &sigev);
		953	close (sigpipe [0]);
		954	close (sigpipe [1]);
		955
		956	while (pipe (sigpipe))
		957	syserr ("(libev) error creating pipe");
		958
		959	siginit (EV_A);
		960	}
		961
		962	postfork = 0;
684	}	963	}
685		964
686	#if EV_MULTIPLICITY	965	#if EV_MULTIPLICITY
687	struct ev_loop *	966	struct ev_loop *
688	ev_loop_new (int methods)	967	ev_loop_new (unsigned int flags)
689	{	968	{
690	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));	969	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
691		970
		971	memset (loop, 0, sizeof (struct ev_loop));
		972
692	loop_init (EV_A_ methods);	973	loop_init (EV_A_ flags);
693		974
694	if (ev_method (EV_A))	975	if (ev_backend (EV_A))
695	return loop;	976	return loop;
696		977
697	return 0;	978	return 0;
698	}	979	}
699		980
700	void	981	void
701	ev_loop_destroy (EV_P)	982	ev_loop_destroy (EV_P)
702	{	983	{
703	loop_destroy (EV_A);	984	loop_destroy (EV_A);
704	free (loop);	985	ev_free (loop);
705	}	986	}
706		987
707	void	988	void
708	ev_loop_fork (EV_P)	989	ev_loop_fork (EV_P)
709	{	990	{
710	loop_fork (EV_A);	991	postfork = 1;
711	}	992	}
712		993
713	#endif	994	#endif
714		995
715	#if EV_MULTIPLICITY	996	#if EV_MULTIPLICITY
716	struct ev_loop default_loop_struct;
717	static struct ev_loop *default_loop;
718
719	struct ev_loop *	997	struct ev_loop *
		998	ev_default_loop_init (unsigned int flags)
720	#else	999	#else
721	static int default_loop;
722
723	int	1000	int
		1001	ev_default_loop (unsigned int flags)
724	#endif	1002	#endif
725	ev_default_loop (int methods)
726	{	1003	{
727	if (sigpipe [0] == sigpipe [1])	1004	if (sigpipe [0] == sigpipe [1])
728	if (pipe (sigpipe))	1005	if (pipe (sigpipe))
729	return 0;	1006	return 0;
730		1007
731	if (!default_loop)	1008	if (!ev_default_loop_ptr)
732	{	1009	{
733	#if EV_MULTIPLICITY	1010	#if EV_MULTIPLICITY
734	struct ev_loop *loop = default_loop = &default_loop_struct;	1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
735	#else	1012	#else
736	default_loop = 1;	1013	ev_default_loop_ptr = 1;
737	#endif	1014	#endif
738		1015
739	loop_init (EV_A_ methods);	1016	loop_init (EV_A_ flags);
740		1017
741	if (ev_method (EV_A))	1018	if (ev_backend (EV_A))
742	{	1019	{
743	ev_watcher_init (&sigev, sigcb);
744	ev_set_priority (&sigev, EV_MAXPRI);
745	siginit (EV_A);	1020	siginit (EV_A);
746		1021
747	#ifndef WIN32	1022	#ifndef _WIN32
748	ev_signal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
749	ev_set_priority (&childev, EV_MAXPRI);	1024	ev_set_priority (&childev, EV_MAXPRI);
750	ev_signal_start (EV_A_ &childev);	1025	ev_signal_start (EV_A_ &childev);
751	ev_unref (EV_A); /* child watcher should not keep loop alive */	1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
752	#endif	1027	#endif
753	}	1028	}
754	else	1029	else
755	default_loop = 0;	1030	ev_default_loop_ptr = 0;
756	}	1031	}
757		1032
758	return default_loop;	1033	return ev_default_loop_ptr;
759	}	1034	}
760		1035
761	void	1036	void
762	ev_default_destroy (void)	1037	ev_default_destroy (void)
763	{	1038	{
764	#if EV_MULTIPLICITY	1039	#if EV_MULTIPLICITY
765	struct ev_loop *loop = default_loop;	1040	struct ev_loop *loop = ev_default_loop_ptr;
766	#endif	1041	#endif
767		1042
		1043	#ifndef _WIN32
768	ev_ref (EV_A); /* child watcher */	1044	ev_ref (EV_A); /* child watcher */
769	ev_signal_stop (EV_A_ &childev);	1045	ev_signal_stop (EV_A_ &childev);
		1046	#endif
770		1047
771	ev_ref (EV_A); /* signal watcher */	1048	ev_ref (EV_A); /* signal watcher */
772	ev_io_stop (EV_A_ &sigev);	1049	ev_io_stop (EV_A_ &sigev);
773		1050
774	close (sigpipe [0]); sigpipe [0] = 0;	1051	close (sigpipe [0]); sigpipe [0] = 0;
…		…
779		1056
780	void	1057	void
781	ev_default_fork (void)	1058	ev_default_fork (void)
782	{	1059	{
783	#if EV_MULTIPLICITY	1060	#if EV_MULTIPLICITY
784	struct ev_loop *loop = default_loop;	1061	struct ev_loop *loop = ev_default_loop_ptr;
785	#endif	1062	#endif
786		1063
787	loop_fork (EV_A);	1064	if (backend)
788		1065	postfork = 1;
789	ev_io_stop (EV_A_ &sigev);
790	close (sigpipe [0]);
791	close (sigpipe [1]);
792	pipe (sigpipe);
793
794	ev_ref (EV_A); /* signal watcher */
795	siginit (EV_A);
796	}	1066	}
797		1067
798	/*****************************************************************************/	1068	/*****************************************************************************/
799		1069
800	static void	1070	int inline_size
		1071	any_pending (EV_P)
		1072	{
		1073	int pri;
		1074
		1075	for (pri = NUMPRI; pri--; )
		1076	if (pendingcnt [pri])
		1077	return 1;
		1078
		1079	return 0;
		1080	}
		1081
		1082	void inline_speed
801	call_pending (EV_P)	1083	call_pending (EV_P)
802	{	1084	{
803	int pri;	1085	int pri;
804		1086
805	for (pri = NUMPRI; pri--; )	1087	for (pri = NUMPRI; pri--; )
806	while (pendingcnt [pri])	1088	while (pendingcnt [pri])
807	{	1089	{
808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
809		1091
810	if (p->w)	1092	if (expect_true (p->w))
811	{	1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
812	p->w->pending = 0;	1096	p->w->pending = 0;
813		1097	EV_CB_INVOKE (p->w, p->events);
814	((void (*)(EV_P_ W, int))p->w->cb) (EV_A_ p->w, p->events);
815	}	1098	}
816	}	1099	}
817	}	1100	}
818		1101
819	static void	1102	void inline_size
820	timers_reify (EV_P)	1103	timers_reify (EV_P)
821	{	1104	{
822	while (timercnt && ((WT)timers [0])->at <= mn_now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
823	{	1106	{
824	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
825		1108
826	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
827		1110
828	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
829	if (w->repeat)	1112	if (w->repeat)
830	{	1113	{
831	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1115
832	((WT)w)->at = mn_now + w->repeat;	1116	((WT)w)->at += w->repeat;
		1117	if (((WT)w)->at < mn_now)
		1118	((WT)w)->at = mn_now;
		1119
833	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
834	}	1121	}
835	else	1122	else
836	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
837		1124
838	event (EV_A_ (W)w, EV_TIMEOUT);	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
839	}	1126	}
840	}	1127	}
841		1128
842	static void	1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
843	periodics_reify (EV_P)	1131	periodics_reify (EV_P)
844	{	1132	{
845	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
846	{	1134	{
847	struct ev_periodic *w = periodics [0];	1135	ev_periodic *w = periodics [0];
848		1136
849	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1137	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
850		1138
851	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
852	if (w->interval)	1140	if (w->reschedule_cb)
853	{	1141	{
		1142	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1143	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1144	downheap ((WT *)periodics, periodiccnt, 0);
		1145	}
		1146	else if (w->interval)
		1147	{
854	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1148	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
855	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));	1149	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
856	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
857	}	1151	}
858	else	1152	else
859	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
860		1154
861	event (EV_A_ (W)w, EV_PERIODIC);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
862	}	1156	}
863	}	1157	}
864		1158
865	static void	1159	static void noinline
866	periodics_reschedule (EV_P)	1160	periodics_reschedule (EV_P)
867	{	1161	{
868	int i;	1162	int i;
869		1163
870	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
871	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
872	{	1166	{
873	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
874		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
875	if (w->interval)	1171	else if (w->interval)
876	{
877	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1172	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
878
879	if (fabs (diff) >= 1e-4)
880	{
881	ev_periodic_stop (EV_A_ w);
882	ev_periodic_start (EV_A_ w);
883
884	i = 0; /* restart loop, inefficient, but time jumps should be rare */
885	}
886	}
887	}	1173	}
888	}
889		1174
890	inline int	1175	/* now rebuild the heap */
		1176	for (i = periodiccnt >> 1; i--; )
		1177	downheap ((WT *)periodics, periodiccnt, i);
		1178	}
		1179	#endif
		1180
		1181	int inline_size
891	time_update_monotonic (EV_P)	1182	time_update_monotonic (EV_P)
892	{	1183	{
893	mn_now = get_clock ();	1184	mn_now = get_clock ();
894		1185
895	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
896	{	1187	{
897	rt_now = rtmn_diff + mn_now;	1188	ev_rt_now = rtmn_diff + mn_now;
898	return 0;	1189	return 0;
899	}	1190	}
900	else	1191	else
901	{	1192	{
902	now_floor = mn_now;	1193	now_floor = mn_now;
903	rt_now = ev_time ();	1194	ev_rt_now = ev_time ();
904	return 1;	1195	return 1;
905	}	1196	}
906	}	1197	}
907		1198
908	static void	1199	void inline_size
909	time_update (EV_P)	1200	time_update (EV_P)
910	{	1201	{
911	int i;	1202	int i;
912		1203
913	#if EV_USE_MONOTONIC	1204	#if EV_USE_MONOTONIC
…		…
915	{	1206	{
916	if (time_update_monotonic (EV_A))	1207	if (time_update_monotonic (EV_A))
917	{	1208	{
918	ev_tstamp odiff = rtmn_diff;	1209	ev_tstamp odiff = rtmn_diff;
919		1210
920	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1211	/* loop a few times, before making important decisions.
		1212	* on the choice of "4": one iteration isn't enough,
		1213	* in case we get preempted during the calls to
		1214	* ev_time and get_clock. a second call is almost guarenteed
		1215	* to succeed in that case, though. and looping a few more times
		1216	* doesn't hurt either as we only do this on time-jumps or
		1217	* in the unlikely event of getting preempted here.
		1218	*/
		1219	for (i = 4; --i; )
921	{	1220	{
922	rtmn_diff = rt_now - mn_now;	1221	rtmn_diff = ev_rt_now - mn_now;
923		1222
924	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
925	return; /* all is well */	1224	return; /* all is well */
926		1225
927	rt_now = ev_time ();	1226	ev_rt_now = ev_time ();
928	mn_now = get_clock ();	1227	mn_now = get_clock ();
929	now_floor = mn_now;	1228	now_floor = mn_now;
930	}	1229	}
931		1230
		1231	# if EV_PERIODIC_ENABLE
932	periodics_reschedule (EV_A);	1232	periodics_reschedule (EV_A);
		1233	# endif
933	/* no timer adjustment, as the monotonic clock doesn't jump */	1234	/* no timer adjustment, as the monotonic clock doesn't jump */
934	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1235	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
935	}	1236	}
936	}	1237	}
937	else	1238	else
938	#endif	1239	#endif
939	{	1240	{
940	rt_now = ev_time ();	1241	ev_rt_now = ev_time ();
941		1242
942	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1243	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
943	{	1244	{
		1245	#if EV_PERIODIC_ENABLE
944	periodics_reschedule (EV_A);	1246	periodics_reschedule (EV_A);
		1247	#endif
945		1248
946	/* adjust timers. this is easy, as the offset is the same for all */	1249	/* adjust timers. this is easy, as the offset is the same for all */
947	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
948	((WT)timers [i])->at += rt_now - mn_now;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
949	}	1252	}
950		1253
951	mn_now = rt_now;	1254	mn_now = ev_rt_now;
952	}	1255	}
953	}	1256	}
954		1257
955	void	1258	void
956	ev_ref (EV_P)	1259	ev_ref (EV_P)
…		…
967	static int loop_done;	1270	static int loop_done;
968		1271
969	void	1272	void
970	ev_loop (EV_P_ int flags)	1273	ev_loop (EV_P_ int flags)
971	{	1274	{
972	double block;
973	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1275	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
974		1278
975	do	1279	while (activecnt)
976	{	1280	{
977	/* queue check watchers (and execute them) */	1281	/* queue check watchers (and execute them) */
978	if (expect_false (preparecnt))	1282	if (expect_false (preparecnt))
979	{	1283	{
980	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1284	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
981	call_pending (EV_A);	1285	call_pending (EV_A);
982	}	1286	}
983		1287
		1288	/* we might have forked, so reify kernel state if necessary */
		1289	if (expect_false (postfork))
		1290	loop_fork (EV_A);
		1291
984	/* update fd-related kernel structures */	1292	/* update fd-related kernel structures */
985	fd_reify (EV_A);	1293	fd_reify (EV_A);
986		1294
987	/* calculate blocking time */	1295	/* calculate blocking time */
		1296	{
		1297	double block;
988		1298
989	/* we only need this for !monotonic clockor timers, but as we basically	1299	if (flags & EVLOOP_NONBLOCK || idlecnt)
990	always have timers, we just calculate it always */	1300	block = 0.; /* do not block at all */
		1301	else
		1302	{
		1303	/* update time to cancel out callback processing overhead */
991	#if EV_USE_MONOTONIC	1304	#if EV_USE_MONOTONIC
992	if (expect_true (have_monotonic))	1305	if (expect_true (have_monotonic))
993	time_update_monotonic (EV_A);	1306	time_update_monotonic (EV_A);
994	else	1307	else
995	#endif	1308	#endif
996	{	1309	{
997	rt_now = ev_time ();	1310	ev_rt_now = ev_time ();
998	mn_now = rt_now;	1311	mn_now = ev_rt_now;
999	}	1312	}
1000		1313
1001	if (flags & EVLOOP_NONBLOCK || idlecnt)
1002	block = 0.;
1003	else
1004	{
1005	block = MAX_BLOCKTIME;	1314	block = MAX_BLOCKTIME;
1006		1315
1007	if (timercnt)	1316	if (timercnt)
1008	{	1317	{
1009	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1318	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1010	if (block > to) block = to;	1319	if (block > to) block = to;
1011	}	1320	}
1012		1321
		1322	#if EV_PERIODIC_ENABLE
1013	if (periodiccnt)	1323	if (periodiccnt)
1014	{	1324	{
1015	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	1325	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1016	if (block > to) block = to;	1326	if (block > to) block = to;
1017	}	1327	}
		1328	#endif
1018		1329
1019	if (block < 0.) block = 0.;	1330	if (expect_false (block < 0.)) block = 0.;
1020	}	1331	}
1021		1332
1022	method_poll (EV_A_ block);	1333	backend_poll (EV_A_ block);
		1334	}
1023		1335
1024	/* update rt_now, do magic */	1336	/* update ev_rt_now, do magic */
1025	time_update (EV_A);	1337	time_update (EV_A);
1026		1338
1027	/* queue pending timers and reschedule them */	1339	/* queue pending timers and reschedule them */
1028	timers_reify (EV_A); /* relative timers called last */	1340	timers_reify (EV_A); /* relative timers called last */
		1341	#if EV_PERIODIC_ENABLE
1029	periodics_reify (EV_A); /* absolute timers called first */	1342	periodics_reify (EV_A); /* absolute timers called first */
		1343	#endif
1030		1344
1031	/* queue idle watchers unless io or timers are pending */	1345	/* queue idle watchers unless other events are pending */
1032	if (!pendingcnt)	1346	if (idlecnt && !any_pending (EV_A))
1033	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1347	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
1034		1348
1035	/* queue check watchers, to be executed first */	1349	/* queue check watchers, to be executed first */
1036	if (checkcnt)	1350	if (expect_false (checkcnt))
1037	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1351	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1038		1352
1039	call_pending (EV_A);	1353	call_pending (EV_A);
1040	}
1041	while (activecnt && !loop_done);
1042		1354
1043	if (loop_done != 2)	1355	if (expect_false (loop_done))
1044	loop_done = 0;	1356	break;
		1357	}
		1358
		1359	if (loop_done == EVUNLOOP_ONE)
		1360	loop_done = EVUNLOOP_CANCEL;
1045	}	1361	}
1046		1362
1047	void	1363	void
1048	ev_unloop (EV_P_ int how)	1364	ev_unloop (EV_P_ int how)
1049	{	1365	{
1050	loop_done = how;	1366	loop_done = how;
1051	}	1367	}
1052		1368
1053	/*****************************************************************************/	1369	/*****************************************************************************/
1054		1370
1055	inline void	1371	void inline_size
1056	wlist_add (WL *head, WL elem)	1372	wlist_add (WL *head, WL elem)
1057	{	1373	{
1058	elem->next = *head;	1374	elem->next = *head;
1059	*head = elem;	1375	*head = elem;
1060	}	1376	}
1061		1377
1062	inline void	1378	void inline_size
1063	wlist_del (WL *head, WL elem)	1379	wlist_del (WL *head, WL elem)
1064	{	1380	{
1065	while (*head)	1381	while (*head)
1066	{	1382	{
1067	if (*head == elem)	1383	if (*head == elem)
…		…
1072		1388
1073	head = &(*head)->next;	1389	head = &(*head)->next;
1074	}	1390	}
1075	}	1391	}
1076		1392
1077	inline void	1393	void inline_speed
1078	ev_clear_pending (EV_P_ W w)	1394	ev_clear_pending (EV_P_ W w)
1079	{	1395	{
1080	if (w->pending)	1396	if (w->pending)
1081	{	1397	{
1082	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1398	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1083	w->pending = 0;	1399	w->pending = 0;
1084	}	1400	}
1085	}	1401	}
1086		1402
1087	inline void	1403	void inline_speed
1088	ev_start (EV_P_ W w, int active)	1404	ev_start (EV_P_ W w, int active)
1089	{	1405	{
1090	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1406	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
1091	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1407	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1092		1408
1093	w->active = active;	1409	w->active = active;
1094	ev_ref (EV_A);	1410	ev_ref (EV_A);
1095	}	1411	}
1096		1412
1097	inline void	1413	void inline_size
1098	ev_stop (EV_P_ W w)	1414	ev_stop (EV_P_ W w)
1099	{	1415	{
1100	ev_unref (EV_A);	1416	ev_unref (EV_A);
1101	w->active = 0;	1417	w->active = 0;
1102	}	1418	}
1103		1419
1104	/*****************************************************************************/	1420	/*****************************************************************************/
1105		1421
1106	void	1422	void
1107	ev_io_start (EV_P_ struct ev_io *w)	1423	ev_io_start (EV_P_ ev_io *w)
1108	{	1424	{
1109	int fd = w->fd;	1425	int fd = w->fd;
1110		1426
1111	if (ev_is_active (w))	1427	if (expect_false (ev_is_active (w)))
1112	return;	1428	return;
1113		1429
1114	assert (("ev_io_start called with negative fd", fd >= 0));	1430	assert (("ev_io_start called with negative fd", fd >= 0));
1115		1431
1116	ev_start (EV_A_ (W)w, 1);	1432	ev_start (EV_A_ (W)w, 1);
1117	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1433	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1118	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1434	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1119		1435
1120	fd_change (EV_A_ fd);	1436	fd_change (EV_A_ fd);
1121	}	1437	}
1122		1438
1123	void	1439	void
1124	ev_io_stop (EV_P_ struct ev_io *w)	1440	ev_io_stop (EV_P_ ev_io *w)
1125	{	1441	{
1126	ev_clear_pending (EV_A_ (W)w);	1442	ev_clear_pending (EV_A_ (W)w);
1127	if (!ev_is_active (w))	1443	if (expect_false (!ev_is_active (w)))
1128	return;	1444	return;
		1445
		1446	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1129		1447
1130	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1448	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1131	ev_stop (EV_A_ (W)w);	1449	ev_stop (EV_A_ (W)w);
1132		1450
1133	fd_change (EV_A_ w->fd);	1451	fd_change (EV_A_ w->fd);
1134	}	1452	}
1135		1453
1136	void	1454	void
1137	ev_timer_start (EV_P_ struct ev_timer *w)	1455	ev_timer_start (EV_P_ ev_timer *w)
1138	{	1456	{
1139	if (ev_is_active (w))	1457	if (expect_false (ev_is_active (w)))
1140	return;	1458	return;
1141		1459
1142	((WT)w)->at += mn_now;	1460	((WT)w)->at += mn_now;
1143		1461
1144	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1462	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1145		1463
1146	ev_start (EV_A_ (W)w, ++timercnt);	1464	ev_start (EV_A_ (W)w, ++timercnt);
1147	array_needsize (timers, timermax, timercnt, );	1465	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1148	timers [timercnt - 1] = w;	1466	timers [timercnt - 1] = w;
1149	upheap ((WT *)timers, timercnt - 1);	1467	upheap ((WT *)timers, timercnt - 1);
1150		1468
1151	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1469	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1152	}	1470	}
1153		1471
1154	void	1472	void
1155	ev_timer_stop (EV_P_ struct ev_timer *w)	1473	ev_timer_stop (EV_P_ ev_timer *w)
1156	{	1474	{
1157	ev_clear_pending (EV_A_ (W)w);	1475	ev_clear_pending (EV_A_ (W)w);
1158	if (!ev_is_active (w))	1476	if (expect_false (!ev_is_active (w)))
1159	return;	1477	return;
1160		1478
1161	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1162		1480
1163	if (((W)w)->active < timercnt--)	1481	if (expect_true (((W)w)->active < timercnt--))
1164	{	1482	{
1165	timers [((W)w)->active - 1] = timers [timercnt];	1483	timers [((W)w)->active - 1] = timers [timercnt];
1166	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1484	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1167	}	1485	}
1168		1486
1169	((WT)w)->at = w->repeat;	1487	((WT)w)->at -= mn_now;
1170		1488
1171	ev_stop (EV_A_ (W)w);	1489	ev_stop (EV_A_ (W)w);
1172	}	1490	}
1173		1491
1174	void	1492	void
1175	ev_timer_again (EV_P_ struct ev_timer *w)	1493	ev_timer_again (EV_P_ ev_timer *w)
1176	{	1494	{
1177	if (ev_is_active (w))	1495	if (ev_is_active (w))
1178	{	1496	{
1179	if (w->repeat)	1497	if (w->repeat)
1180	{	1498	{
1181	((WT)w)->at = mn_now + w->repeat;	1499	((WT)w)->at = mn_now + w->repeat;
1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1500	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1183	}	1501	}
1184	else	1502	else
1185	ev_timer_stop (EV_A_ w);	1503	ev_timer_stop (EV_A_ w);
1186	}	1504	}
1187	else if (w->repeat)	1505	else if (w->repeat)
		1506	{
		1507	w->at = w->repeat;
1188	ev_timer_start (EV_A_ w);	1508	ev_timer_start (EV_A_ w);
		1509	}
1189	}	1510	}
1190		1511
		1512	#if EV_PERIODIC_ENABLE
1191	void	1513	void
1192	ev_periodic_start (EV_P_ struct ev_periodic *w)	1514	ev_periodic_start (EV_P_ ev_periodic *w)
1193	{	1515	{
1194	if (ev_is_active (w))	1516	if (expect_false (ev_is_active (w)))
1195	return;	1517	return;
1196		1518
		1519	if (w->reschedule_cb)
		1520	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1521	else if (w->interval)
		1522	{
1197	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1523	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1198
1199	/* this formula differs from the one in periodic_reify because we do not always round up */	1524	/* this formula differs from the one in periodic_reify because we do not always round up */
1200	if (w->interval)
1201	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1525	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1526	}
1202		1527
1203	ev_start (EV_A_ (W)w, ++periodiccnt);	1528	ev_start (EV_A_ (W)w, ++periodiccnt);
1204	array_needsize (periodics, periodicmax, periodiccnt, );	1529	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1205	periodics [periodiccnt - 1] = w;	1530	periodics [periodiccnt - 1] = w;
1206	upheap ((WT *)periodics, periodiccnt - 1);	1531	upheap ((WT *)periodics, periodiccnt - 1);
1207		1532
1208	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1533	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1209	}	1534	}
1210		1535
1211	void	1536	void
1212	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1537	ev_periodic_stop (EV_P_ ev_periodic *w)
1213	{	1538	{
1214	ev_clear_pending (EV_A_ (W)w);	1539	ev_clear_pending (EV_A_ (W)w);
1215	if (!ev_is_active (w))	1540	if (expect_false (!ev_is_active (w)))
1216	return;	1541	return;
1217		1542
1218	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1219		1544
1220	if (((W)w)->active < periodiccnt--)	1545	if (expect_true (((W)w)->active < periodiccnt--))
1221	{	1546	{
1222	periodics [((W)w)->active - 1] = periodics [periodiccnt];	1547	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1223	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	1548	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1224	}	1549	}
1225		1550
1226	ev_stop (EV_A_ (W)w);	1551	ev_stop (EV_A_ (W)w);
1227	}	1552	}
1228		1553
1229	void	1554	void
1230	ev_idle_start (EV_P_ struct ev_idle *w)	1555	ev_periodic_again (EV_P_ ev_periodic *w)
1231	{	1556	{
1232	if (ev_is_active (w))	1557	/* TODO: use adjustheap and recalculation */
1233	return;
1234
1235	ev_start (EV_A_ (W)w, ++idlecnt);
1236	array_needsize (idles, idlemax, idlecnt, );
1237	idles [idlecnt - 1] = w;
1238	}
1239
1240	void
1241	ev_idle_stop (EV_P_ struct ev_idle *w)
1242	{
1243	ev_clear_pending (EV_A_ (W)w);
1244	if (ev_is_active (w))
1245	return;
1246
1247	idles [((W)w)->active - 1] = idles [--idlecnt];
1248	ev_stop (EV_A_ (W)w);	1558	ev_periodic_stop (EV_A_ w);
		1559	ev_periodic_start (EV_A_ w);
1249	}	1560	}
1250		1561	#endif
1251	void
1252	ev_prepare_start (EV_P_ struct ev_prepare *w)
1253	{
1254	if (ev_is_active (w))
1255	return;
1256
1257	ev_start (EV_A_ (W)w, ++preparecnt);
1258	array_needsize (prepares, preparemax, preparecnt, );
1259	prepares [preparecnt - 1] = w;
1260	}
1261
1262	void
1263	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1264	{
1265	ev_clear_pending (EV_A_ (W)w);
1266	if (ev_is_active (w))
1267	return;
1268
1269	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1270	ev_stop (EV_A_ (W)w);
1271	}
1272
1273	void
1274	ev_check_start (EV_P_ struct ev_check *w)
1275	{
1276	if (ev_is_active (w))
1277	return;
1278
1279	ev_start (EV_A_ (W)w, ++checkcnt);
1280	array_needsize (checks, checkmax, checkcnt, );
1281	checks [checkcnt - 1] = w;
1282	}
1283
1284	void
1285	ev_check_stop (EV_P_ struct ev_check *w)
1286	{
1287	ev_clear_pending (EV_A_ (W)w);
1288	if (ev_is_active (w))
1289	return;
1290
1291	checks [((W)w)->active - 1] = checks [--checkcnt];
1292	ev_stop (EV_A_ (W)w);
1293	}
1294		1562
1295	#ifndef SA_RESTART	1563	#ifndef SA_RESTART
1296	# define SA_RESTART 0	1564	# define SA_RESTART 0
1297	#endif	1565	#endif
1298		1566
1299	void	1567	void
1300	ev_signal_start (EV_P_ struct ev_signal *w)	1568	ev_signal_start (EV_P_ ev_signal *w)
1301	{	1569	{
1302	#if EV_MULTIPLICITY	1570	#if EV_MULTIPLICITY
1303	assert (("signal watchers are only supported in the default loop", loop == default_loop));	1571	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1304	#endif	1572	#endif
1305	if (ev_is_active (w))	1573	if (expect_false (ev_is_active (w)))
1306	return;	1574	return;
1307		1575
1308	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1576	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1309		1577
1310	ev_start (EV_A_ (W)w, 1);	1578	ev_start (EV_A_ (W)w, 1);
1311	array_needsize (signals, signalmax, w->signum, signals_init);	1579	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1312	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1580	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1313		1581
1314	if (!((WL)w)->next)	1582	if (!((WL)w)->next)
1315	{	1583	{
		1584	#if _WIN32
		1585	signal (w->signum, sighandler);
		1586	#else
1316	struct sigaction sa;	1587	struct sigaction sa;
1317	sa.sa_handler = sighandler;	1588	sa.sa_handler = sighandler;
1318	sigfillset (&sa.sa_mask);	1589	sigfillset (&sa.sa_mask);
1319	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1590	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1320	sigaction (w->signum, &sa, 0);	1591	sigaction (w->signum, &sa, 0);
		1592	#endif
1321	}	1593	}
1322	}	1594	}
1323		1595
1324	void	1596	void
1325	ev_signal_stop (EV_P_ struct ev_signal *w)	1597	ev_signal_stop (EV_P_ ev_signal *w)
1326	{	1598	{
1327	ev_clear_pending (EV_A_ (W)w);	1599	ev_clear_pending (EV_A_ (W)w);
1328	if (!ev_is_active (w))	1600	if (expect_false (!ev_is_active (w)))
1329	return;	1601	return;
1330		1602
1331	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1603	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1332	ev_stop (EV_A_ (W)w);	1604	ev_stop (EV_A_ (W)w);
1333		1605
1334	if (!signals [w->signum - 1].head)	1606	if (!signals [w->signum - 1].head)
1335	signal (w->signum, SIG_DFL);	1607	signal (w->signum, SIG_DFL);
1336	}	1608	}
1337		1609
1338	void	1610	void
1339	ev_child_start (EV_P_ struct ev_child *w)	1611	ev_child_start (EV_P_ ev_child *w)
1340	{	1612	{
1341	#if EV_MULTIPLICITY	1613	#if EV_MULTIPLICITY
1342	assert (("child watchers are only supported in the default loop", loop == default_loop));	1614	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1343	#endif	1615	#endif
1344	if (ev_is_active (w))	1616	if (expect_false (ev_is_active (w)))
1345	return;	1617	return;
1346		1618
1347	ev_start (EV_A_ (W)w, 1);	1619	ev_start (EV_A_ (W)w, 1);
1348	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1620	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1349	}	1621	}
1350		1622
1351	void	1623	void
1352	ev_child_stop (EV_P_ struct ev_child *w)	1624	ev_child_stop (EV_P_ ev_child *w)
1353	{	1625	{
1354	ev_clear_pending (EV_A_ (W)w);	1626	ev_clear_pending (EV_A_ (W)w);
1355	if (ev_is_active (w))	1627	if (expect_false (!ev_is_active (w)))
1356	return;	1628	return;
1357		1629
1358	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1630	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1359	ev_stop (EV_A_ (W)w);	1631	ev_stop (EV_A_ (W)w);
1360	}	1632	}
1361		1633
		1634	#if EV_STAT_ENABLE
		1635
		1636	# ifdef _WIN32
		1637	# undef lstat
		1638	# define lstat(a,b) _stati64 (a,b)
		1639	# endif
		1640
		1641	#define DEF_STAT_INTERVAL 5.0074891
		1642	#define MIN_STAT_INTERVAL 0.1074891
		1643
		1644	void
		1645	ev_stat_stat (EV_P_ ev_stat *w)
		1646	{
		1647	if (lstat (w->path, &w->attr) < 0)
		1648	w->attr.st_nlink = 0;
		1649	else if (!w->attr.st_nlink)
		1650	w->attr.st_nlink = 1;
		1651	}
		1652
		1653	static void
		1654	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1655	{
		1656	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1657
		1658	/* we copy this here each the time so that */
		1659	/* prev has the old value when the callback gets invoked */
		1660	w->prev = w->attr;
		1661	ev_stat_stat (EV_A_ w);
		1662
		1663	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1664	ev_feed_event (EV_A_ w, EV_STAT);
		1665	}
		1666
		1667	void
		1668	ev_stat_start (EV_P_ ev_stat *w)
		1669	{
		1670	if (expect_false (ev_is_active (w)))
		1671	return;
		1672
		1673	/* since we use memcmp, we need to clear any padding data etc. */
		1674	memset (&w->prev, 0, sizeof (ev_statdata));
		1675	memset (&w->attr, 0, sizeof (ev_statdata));
		1676
		1677	ev_stat_stat (EV_A_ w);
		1678
		1679	if (w->interval < MIN_STAT_INTERVAL)
		1680	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1681
		1682	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1683	ev_set_priority (&w->timer, ev_priority (w));
		1684	ev_timer_start (EV_A_ &w->timer);
		1685
		1686	ev_start (EV_A_ (W)w, 1);
		1687	}
		1688
		1689	void
		1690	ev_stat_stop (EV_P_ ev_stat *w)
		1691	{
		1692	ev_clear_pending (EV_A_ (W)w);
		1693	if (expect_false (!ev_is_active (w)))
		1694	return;
		1695
		1696	ev_timer_stop (EV_A_ &w->timer);
		1697
		1698	ev_stop (EV_A_ (W)w);
		1699	}
		1700	#endif
		1701
		1702	void
		1703	ev_idle_start (EV_P_ ev_idle *w)
		1704	{
		1705	if (expect_false (ev_is_active (w)))
		1706	return;
		1707
		1708	ev_start (EV_A_ (W)w, ++idlecnt);
		1709	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1710	idles [idlecnt - 1] = w;
		1711	}
		1712
		1713	void
		1714	ev_idle_stop (EV_P_ ev_idle *w)
		1715	{
		1716	ev_clear_pending (EV_A_ (W)w);
		1717	if (expect_false (!ev_is_active (w)))
		1718	return;
		1719
		1720	{
		1721	int active = ((W)w)->active;
		1722	idles [active - 1] = idles [--idlecnt];
		1723	((W)idles [active - 1])->active = active;
		1724	}
		1725
		1726	ev_stop (EV_A_ (W)w);
		1727	}
		1728
		1729	void
		1730	ev_prepare_start (EV_P_ ev_prepare *w)
		1731	{
		1732	if (expect_false (ev_is_active (w)))
		1733	return;
		1734
		1735	ev_start (EV_A_ (W)w, ++preparecnt);
		1736	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1737	prepares [preparecnt - 1] = w;
		1738	}
		1739
		1740	void
		1741	ev_prepare_stop (EV_P_ ev_prepare *w)
		1742	{
		1743	ev_clear_pending (EV_A_ (W)w);
		1744	if (expect_false (!ev_is_active (w)))
		1745	return;
		1746
		1747	{
		1748	int active = ((W)w)->active;
		1749	prepares [active - 1] = prepares [--preparecnt];
		1750	((W)prepares [active - 1])->active = active;
		1751	}
		1752
		1753	ev_stop (EV_A_ (W)w);
		1754	}
		1755
		1756	void
		1757	ev_check_start (EV_P_ ev_check *w)
		1758	{
		1759	if (expect_false (ev_is_active (w)))
		1760	return;
		1761
		1762	ev_start (EV_A_ (W)w, ++checkcnt);
		1763	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1764	checks [checkcnt - 1] = w;
		1765	}
		1766
		1767	void
		1768	ev_check_stop (EV_P_ ev_check *w)
		1769	{
		1770	ev_clear_pending (EV_A_ (W)w);
		1771	if (expect_false (!ev_is_active (w)))
		1772	return;
		1773
		1774	{
		1775	int active = ((W)w)->active;
		1776	checks [active - 1] = checks [--checkcnt];
		1777	((W)checks [active - 1])->active = active;
		1778	}
		1779
		1780	ev_stop (EV_A_ (W)w);
		1781	}
		1782
		1783	#if EV_EMBED_ENABLE
		1784	void noinline
		1785	ev_embed_sweep (EV_P_ ev_embed *w)
		1786	{
		1787	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1788	}
		1789
		1790	static void
		1791	embed_cb (EV_P_ ev_io *io, int revents)
		1792	{
		1793	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1794
		1795	if (ev_cb (w))
		1796	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1797	else
		1798	ev_embed_sweep (loop, w);
		1799	}
		1800
		1801	void
		1802	ev_embed_start (EV_P_ ev_embed *w)
		1803	{
		1804	if (expect_false (ev_is_active (w)))
		1805	return;
		1806
		1807	{
		1808	struct ev_loop *loop = w->loop;
		1809	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1810	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1811	}
		1812
		1813	ev_set_priority (&w->io, ev_priority (w));
		1814	ev_io_start (EV_A_ &w->io);
		1815
		1816	ev_start (EV_A_ (W)w, 1);
		1817	}
		1818
		1819	void
		1820	ev_embed_stop (EV_P_ ev_embed *w)
		1821	{
		1822	ev_clear_pending (EV_A_ (W)w);
		1823	if (expect_false (!ev_is_active (w)))
		1824	return;
		1825
		1826	ev_io_stop (EV_A_ &w->io);
		1827
		1828	ev_stop (EV_A_ (W)w);
		1829	}
		1830	#endif
		1831
1362	/*****************************************************************************/	1832	/*****************************************************************************/
1363		1833
1364	struct ev_once	1834	struct ev_once
1365	{	1835	{
1366	struct ev_io io;	1836	ev_io io;
1367	struct ev_timer to;	1837	ev_timer to;
1368	void (*cb)(int revents, void *arg);	1838	void (*cb)(int revents, void *arg);
1369	void *arg;	1839	void *arg;
1370	};	1840	};
1371		1841
1372	static void	1842	static void
…		…
1375	void (*cb)(int revents, void *arg) = once->cb;	1845	void (*cb)(int revents, void *arg) = once->cb;
1376	void *arg = once->arg;	1846	void *arg = once->arg;
1377		1847
1378	ev_io_stop (EV_A_ &once->io);	1848	ev_io_stop (EV_A_ &once->io);
1379	ev_timer_stop (EV_A_ &once->to);	1849	ev_timer_stop (EV_A_ &once->to);
1380	free (once);	1850	ev_free (once);
1381		1851
1382	cb (revents, arg);	1852	cb (revents, arg);
1383	}	1853	}
1384		1854
1385	static void	1855	static void
1386	once_cb_io (EV_P_ struct ev_io *w, int revents)	1856	once_cb_io (EV_P_ ev_io *w, int revents)
1387	{	1857	{
1388	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1858	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1389	}	1859	}
1390		1860
1391	static void	1861	static void
1392	once_cb_to (EV_P_ struct ev_timer *w, int revents)	1862	once_cb_to (EV_P_ ev_timer *w, int revents)
1393	{	1863	{
1394	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1864	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1395	}	1865	}
1396		1866
1397	void	1867	void
1398	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1868	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1399	{	1869	{
1400	struct ev_once *once = malloc (sizeof (struct ev_once));	1870	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1401		1871
1402	if (!once)	1872	if (expect_false (!once))
		1873	{
1403	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1874	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1404	else	1875	return;
1405	{	1876	}
		1877
1406	once->cb = cb;	1878	once->cb = cb;
1407	once->arg = arg;	1879	once->arg = arg;
1408		1880
1409	ev_watcher_init (&once->io, once_cb_io);	1881	ev_init (&once->io, once_cb_io);
1410	if (fd >= 0)	1882	if (fd >= 0)
1411	{	1883	{
1412	ev_io_set (&once->io, fd, events);	1884	ev_io_set (&once->io, fd, events);
1413	ev_io_start (EV_A_ &once->io);	1885	ev_io_start (EV_A_ &once->io);
1414	}	1886	}
1415		1887
1416	ev_watcher_init (&once->to, once_cb_to);	1888	ev_init (&once->to, once_cb_to);
1417	if (timeout >= 0.)	1889	if (timeout >= 0.)
1418	{	1890	{
1419	ev_timer_set (&once->to, timeout, 0.);	1891	ev_timer_set (&once->to, timeout, 0.);
1420	ev_timer_start (EV_A_ &once->to);	1892	ev_timer_start (EV_A_ &once->to);
1421	}
1422	}	1893	}
1423	}	1894	}
1424		1895
		1896	#ifdef __cplusplus
		1897	}
		1898	#endif
		1899

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