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

Comparing libev/ev.c (file contents):
Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs.
Revision 1.147 by root, Tue Nov 27 10:59:11 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
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		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
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		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
		97	# endif
		98
33	#endif	99	#endif
34		100
35	#include <math.h>	101	#include <math.h>
36	#include <stdlib.h>	102	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	103	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	104	#include <stddef.h>
41		105
42	#include <stdio.h>	106	#include <stdio.h>
43		107
44	#include <assert.h>	108	#include <assert.h>
45	#include <errno.h>	109	#include <errno.h>
46	#include <sys/types.h>	110	#include <sys/types.h>
		111	#include <time.h>
		112
		113	#include <signal.h>
		114
47	#ifndef WIN32	115	#ifndef _WIN32
		116	# include <sys/time.h>
48	# 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
49	#endif	124	# endif
50	#include <sys/time.h>	125	#endif
51	#include <time.h>
52		126
53	/**/	127	/**/
54		128
55	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
56	# 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
57	#endif	135	#endif
58		136
59	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
61	#endif	139	#endif
62		140
63	#ifndef EV_USE_POLL	141	#ifndef EV_USE_POLL
64	# 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
65	#endif	147	#endif
66		148
67	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
68	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
69	#endif	151	#endif
70		152
71	#ifndef EV_USE_KQUEUE	153	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	154	# define EV_USE_KQUEUE 0
73	#endif	155	#endif
74		156
75	#ifndef EV_USE_REALTIME	157	#ifndef EV_USE_PORT
76	# define EV_USE_REALTIME 1	158	# define EV_USE_PORT 0
77	#endif	159	#endif
78		160
79	/**/	161	/**/
80		162
81	#ifndef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
…		…
86	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
87	# undef EV_USE_REALTIME	169	# undef EV_USE_REALTIME
88	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
89	#endif	171	#endif
90		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
91	/**/	177	/**/
92		178
93	#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) */
94	#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) */
95	#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 */
96	/#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 */
97		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
98	#include "ev.h"	187	# include "ev.h"
		188	#endif
99		189
100	#if __GNUC__ >= 3	190	#if __GNUC__ >= 3
101	# 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
102	# 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
103	#else	200	#else
104	# define expect(expr,value) (expr)	201	# define expect(expr,value) (expr)
		202	# define inline_speed static
105	# define inline static	203	# define inline_size static
		204	# define noinline
106	#endif	205	#endif
107		206
108	#define expect_false(expr) expect ((expr) != 0, 0)	207	#define expect_false(expr) expect ((expr) != 0, 0)
109	#define expect_true(expr) expect ((expr) != 0, 1)	208	#define expect_true(expr) expect ((expr) != 0, 1)
110		209
111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
113		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
114	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
117		219
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		221
		222	#ifdef _WIN32
		223	# include "ev_win32.c"
		224	#endif
		225
		226	/*****************************************************************************/
		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
		278	typedef struct
		279	{
		280	WL head;
		281	unsigned char events;
		282	unsigned char reify;
		283	#if EV_SELECT_IS_WINSOCKET
		284	SOCKET handle;
		285	#endif
		286	} ANFD;
		287
		288	typedef struct
		289	{
		290	W w;
		291	int events;
		292	} ANPENDING;
		293
		294	#if EV_MULTIPLICITY
		295
		296	struct ev_loop
		297	{
		298	ev_tstamp ev_rt_now;
		299	#define ev_rt_now ((loop)->ev_rt_now)
		300	#define VAR(name,decl) decl;
		301	#include "ev_vars.h"
		302	#undef VAR
		303	};
		304	#include "ev_wrap.h"
		305
		306	static struct ev_loop default_loop_struct;
		307	struct ev_loop *ev_default_loop_ptr;
		308
		309	#else
		310
119	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
120	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
121		315
122	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
123		317
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
125	static void (*method_modify)(int fd, int oev, int nev);
126	static void (*method_poll)(ev_tstamp timeout);
127		319
128	/*****************************************************************************/	320	/*****************************************************************************/
129		321
130	ev_tstamp	322	ev_tstamp
131	ev_time (void)	323	ev_time (void)
…		…
139	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	333	#endif
142	}	334	}
143		335
144	static ev_tstamp	336	ev_tstamp inline_size
145	get_clock (void)	337	get_clock (void)
146	{	338	{
147	#if EV_USE_MONOTONIC	339	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	340	if (expect_true (have_monotonic))
149	{	341	{
…		…
154	#endif	346	#endif
155		347
156	return ev_time ();	348	return ev_time ();
157	}	349	}
158		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
159	#define array_roundsize(base,n) ((n) \| 4 & ~3)	359	#define array_roundsize(type,n) (((n) \| 4) & ~3)
160		360
161	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
162	if (expect_false ((cnt) > cur)) \	362	if (expect_false ((cnt) > cur)) \
163	{ \	363	{ \
164	int newcnt = cur; \	364	int newcnt = cur; \
165	do \	365	do \
166	{ \	366	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \	367	newcnt = array_roundsize (type, newcnt << 1); \
168	} \	368	} \
169	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
170	\	370	\
171	base = realloc (base, sizeof (base) (newcnt)); \	371	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
172	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
173	cur = newcnt; \	373	cur = newcnt; \
174	}	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/\
		382	}
		383
		384	#define array_free(stem, idx) \
		385	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
175		386
176	/*****************************************************************************/	387	/*****************************************************************************/
177		388
178	typedef struct	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
179	{	391	{
180	struct ev_watcher_list *head;	392	W w_ = (W)w;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184		393
185	static ANFD *anfds;	394	if (expect_false (w_->pending))
186	static int anfdmax;	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		397	return;
		398	}
187		399
188	static void	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
189	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
190	{	419	{
191	while (count--)	420	while (count--)
192	{	421	{
193	base->head = 0;	422	base->head = 0;
…		…
196		425
197	++base;	426	++base;
198	}	427	}
199	}	428	}
200		429
201	typedef struct	430	void inline_speed
202	{
203	W w;
204	int events;
205	} ANPENDING;
206
207	static ANPENDING *pendings [NUMPRI];
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void
211	event (W w, int events)
212	{
213	if (w->pending)
214	{
215	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
216	return;
217	}
218
219	w->pending = ++pendingcnt [ABSPRI (w)];
220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}
224
225	static void
226	queue_events (W *events, int eventcnt, int type)
227	{
228	int i;
229
230	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);
232	}
233
234	static void
235	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
236	{	432	{
237	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	434	ev_io *w;
239		435
240	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)
241	{	437	{
242	int ev = w->events & events;	438	int ev = w->events & revents;
243		439
244	if (ev)	440	if (ev)
245	event ((W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
246	}	442	}
247	}	443	}
248		444
249	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
250		450
251	static int *fdchanges;	451	void inline_size
252	static int fdchangemax, fdchangecnt;	452	fd_reify (EV_P)
253
254	static void
255	fd_reify (void)
256	{	453	{
257	int i;	454	int i;
258		455
259	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
260	{	457	{
261	int fd = fdchanges [i];	458	int fd = fdchanges [i];
262	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
263	struct ev_io *w;	460	ev_io *w;
264		461
265	int events = 0;	462	int events = 0;
266		463
267	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)
268	events \|= w->events;	465	events \|= w->events;
269		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
270	anfd->reify = 0;	476	anfd->reify = 0;
271		477
272	if (anfd->events != events)
273	{
274	method_modify (fd, anfd->events, events);	478	backend_modify (EV_A_ fd, anfd->events, events);
275	anfd->events = events;	479	anfd->events = events;
276	}
277	}	480	}
278		481
279	fdchangecnt = 0;	482	fdchangecnt = 0;
280	}	483	}
281		484
282	static void	485	void inline_size
283	fd_change (int fd)	486	fd_change (EV_P_ int fd)
284	{	487	{
285	if (anfds [fd].reify \|\| fdchangecnt < 0)	488	if (expect_false (anfds [fd].reify))
286	return;	489	return;
287		490
288	anfds [fd].reify = 1;	491	anfds [fd].reify = 1;
289		492
290	++fdchangecnt;	493	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
293	}	496	}
294		497
295	static void	498	void inline_speed
296	fd_kill (int fd)	499	fd_kill (EV_P_ int fd)
297	{	500	{
298	struct ev_io *w;	501	ev_io *w;
299		502
300	while ((w = (struct ev_io *)anfds [fd].head))	503	while ((w = (ev_io *)anfds [fd].head))
301	{	504	{
302	ev_io_stop (w);	505	ev_io_stop (EV_A_ w);
303	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);	506	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
304	}	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
305	}	518	}
306		519
307	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
308	static void	521	static void noinline
309	fd_ebadf (void)	522	fd_ebadf (EV_P)
310	{	523	{
311	int fd;	524	int fd;
312		525
313	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
314	if (anfds [fd].events)	527	if (anfds [fd].events)
315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
316	fd_kill (fd);	529	fd_kill (EV_A_ fd);
317	}	530	}
318		531
319	/* 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 */
320	static void	533	static void noinline
321	fd_enomem (void)	534	fd_enomem (EV_P)
322	{	535	{
323	int fd = anfdmax;	536	int fd;
324		537
325	while (fd--)	538	for (fd = anfdmax; fd--; )
326	if (anfds [fd].events)	539	if (anfds [fd].events)
327	{	540	{
328	close (fd);
329	fd_kill (fd);	541	fd_kill (EV_A_ fd);
330	return;	542	return;
331	}	543	}
332	}	544	}
333		545
		546	/* usually called after fork if backend needs to re-arm all fds from scratch */
		547	static void noinline
		548	fd_rearm_all (EV_P)
		549	{
		550	int fd;
		551
		552	/* this should be highly optimised to not do anything but set a flag */
		553	for (fd = 0; fd < anfdmax; ++fd)
		554	if (anfds [fd].events)
		555	{
		556	anfds [fd].events = 0;
		557	fd_change (EV_A_ fd);
		558	}
		559	}
		560
334	/*****************************************************************************/	561	/*****************************************************************************/
335		562
336	static struct ev_timer **timers;	563	void inline_speed
337	static int timermax, timercnt;
338
339	static struct ev_periodic **periodics;
340	static int periodicmax, periodiccnt;
341
342	static void
343	upheap (WT *timers, int k)	564	upheap (WT *heap, int k)
344	{	565	{
345	WT w = timers [k];	566	WT w = heap [k];
346		567
347	while (k && timers [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
348	{	569	{
349	timers [k] = timers [k >> 1];	570	heap [k] = heap [k >> 1];
350	timers [k]->active = k + 1;	571	((W)heap [k])->active = k + 1;
351	k >>= 1;	572	k >>= 1;
352	}	573	}
353		574
354	timers [k] = w;	575	heap [k] = w;
355	timers [k]->active = k + 1;	576	((W)heap [k])->active = k + 1;
356		577
357	}	578	}
358		579
359	static void	580	void inline_speed
360	downheap (WT *timers, int N, int k)	581	downheap (WT *heap, int N, int k)
361	{	582	{
362	WT w = timers [k];	583	WT w = heap [k];
363		584
364	while (k < (N >> 1))	585	while (k < (N >> 1))
365	{	586	{
366	int j = k << 1;	587	int j = k << 1;
367		588
368	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
369	++j;	590	++j;
370		591
371	if (w->at <= timers [j]->at)	592	if (w->at <= heap [j]->at)
372	break;	593	break;
373		594
374	timers [k] = timers [j];	595	heap [k] = heap [j];
375	timers [k]->active = k + 1;	596	((W)heap [k])->active = k + 1;
376	k = j;	597	k = j;
377	}	598	}
378		599
379	timers [k] = w;	600	heap [k] = w;
380	timers [k]->active = k + 1;	601	((W)heap [k])->active = k + 1;
		602	}
		603
		604	void inline_size
		605	adjustheap (WT *heap, int N, int k)
		606	{
		607	upheap (heap, k);
		608	downheap (heap, N, k);
381	}	609	}
382		610
383	/*****************************************************************************/	611	/*****************************************************************************/
384		612
385	typedef struct	613	typedef struct
386	{	614	{
387	struct ev_watcher_list *head;	615	WL head;
388	sig_atomic_t volatile gotsig;	616	sig_atomic_t volatile gotsig;
389	} ANSIG;	617	} ANSIG;
390		618
391	static ANSIG *signals;	619	static ANSIG *signals;
392	static int signalmax;	620	static int signalmax;
393		621
394	static int sigpipe [2];	622	static int sigpipe [2];
395	static sig_atomic_t volatile gotsig;	623	static sig_atomic_t volatile gotsig;
396	static struct ev_io sigev;	624	static ev_io sigev;
397		625
398	static void	626	void inline_size
399	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
400	{	628	{
401	while (count--)	629	while (count--)
402	{	630	{
403	base->head = 0;	631	base->head = 0;
…		…
408	}	636	}
409		637
410	static void	638	static void
411	sighandler (int signum)	639	sighandler (int signum)
412	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
413	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
414		646
415	if (!gotsig)	647	if (!gotsig)
416	{	648	{
417	int old_errno = errno;	649	int old_errno = errno;
…		…
419	write (sigpipe [1], &signum, 1);	651	write (sigpipe [1], &signum, 1);
420	errno = old_errno;	652	errno = old_errno;
421	}	653	}
422	}	654	}
423		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
424	static void	676	static void
425	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
426	{	678	{
427	struct ev_watcher_list *w;
428	int signum;	679	int signum;
429		680
430	read (sigpipe [0], &revents, 1);	681	read (sigpipe [0], &revents, 1);
431	gotsig = 0;	682	gotsig = 0;
432		683
433	for (signum = signalmax; signum--; )	684	for (signum = signalmax; signum--; )
434	if (signals [signum].gotsig)	685	if (signals [signum].gotsig)
		686	ev_feed_signal_event (EV_A_ signum + 1);
		687	}
		688
		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
		702	siginit (EV_P)
		703	{
		704	fd_intern (sigpipe [0]);
		705	fd_intern (sigpipe [1]);
		706
		707	ev_io_set (&sigev, sigpipe [0], EV_READ);
		708	ev_io_start (EV_A_ &sigev);
		709	ev_unref (EV_A); /* child watcher should not keep loop alive */
		710	}
		711
		712	/*****************************************************************************/
		713
		714	static ev_child *childs [PID_HASHSIZE];
		715
		716	#ifndef _WIN32
		717
		718	static ev_signal childev;
		719
		720	void inline_speed
		721	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		722	{
		723	ev_child *w;
		724
		725	for (w = (ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		726	if (w->pid == pid \|\| !w->pid)
435	{	727	{
436	signals [signum].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it now */
437		729	w->rpid = pid;
438	for (w = signals [signum].head; w; w = w->next)	730	w->rstatus = status;
439	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
440	}	732	}
441	}	733	}
442
443	static void
444	siginit (void)
445	{
446	#ifndef WIN32
447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
449
450	/* rather than sort out wether we really need nb, set it */
451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
453	#endif
454
455	ev_io_set (&sigev, sigpipe [0], EV_READ);
456	ev_io_start (&sigev);
457	}
458
459	/*****************************************************************************/
460
461	static struct ev_idle **idles;
462	static int idlemax, idlecnt;
463
464	static struct ev_prepare **prepares;
465	static int preparemax, preparecnt;
466
467	static struct ev_check **checks;
468	static int checkmax, checkcnt;
469
470	/*****************************************************************************/
471
472	static struct ev_child *childs [PID_HASHSIZE];
473	static struct ev_signal childev;
474
475	#ifndef WIN32
476		734
477	#ifndef WCONTINUED	735	#ifndef WCONTINUED
478	# define WCONTINUED 0	736	# define WCONTINUED 0
479	#endif	737	#endif
480		738
481	static void	739	static void
482	child_reap (struct ev_signal *sw, int chain, int pid, int status)
483	{
484	struct ev_child *w;
485
486	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
487	if (w->pid == pid \|\| !w->pid)
488	{
489	w->priority = sw->priority; /* need to do it now */
490	w->rpid = pid;
491	w->rstatus = status;
492	event ((W)w, EV_CHILD);
493	}
494	}
495
496	static void
497	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
498	{	741	{
499	int pid, status;	742	int pid, status;
500		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
501	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
502	{	746	if (!WCONTINUED
		747	\|\| errno != EINVAL
		748	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
		749	return;
		750
503	/* 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 */
504	event ((W)sw, EV_SIGNAL);	753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
505		754
506	child_reap (sw, pid, pid, status);	755	child_reap (EV_A_ sw, pid, pid, status);
507	child_reap (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 */
508	}
509	}	757	}
510		758
511	#endif	759	#endif
512		760
513	/*****************************************************************************/	761	/*****************************************************************************/
514		762
		763	#if EV_USE_PORT
		764	# include "ev_port.c"
		765	#endif
515	#if EV_USE_KQUEUE	766	#if EV_USE_KQUEUE
516	# include "ev_kqueue.c"	767	# include "ev_kqueue.c"
517	#endif	768	#endif
518	#if EV_USE_EPOLL	769	#if EV_USE_EPOLL
519	# include "ev_epoll.c"	770	# include "ev_epoll.c"
…		…
536	{	787	{
537	return EV_VERSION_MINOR;	788	return EV_VERSION_MINOR;
538	}	789	}
539		790
540	/* 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 */
541	static int	792	int inline_size
542	enable_secure ()	793	enable_secure (void)
543	{	794	{
544	#ifdef WIN32	795	#ifdef _WIN32
545	return 0;	796	return 0;
546	#else	797	#else
547	return getuid () != geteuid ()	798	return getuid () != geteuid ()
548	\|\| getgid () != getegid ();	799	\|\| getgid () != getegid ();
549	#endif	800	#endif
550	}	801	}
551		802
552	int ev_init (int methods)	803	unsigned int
		804	ev_supported_backends (void)
553	{	805	{
554	if (!ev_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;
		847	}
		848
		849	static void
		850	loop_init (EV_P_ unsigned int flags)
		851	{
		852	if (!backend)
555	{	853	{
556	#if EV_USE_MONOTONIC	854	#if EV_USE_MONOTONIC
557	{	855	{
558	struct timespec ts;	856	struct timespec ts;
559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
560	have_monotonic = 1;	858	have_monotonic = 1;
561	}	859	}
562	#endif	860	#endif
563		861
564	ev_now = ev_time ();	862	ev_rt_now = ev_time ();
565	now = get_clock ();	863	mn_now = get_clock ();
566	now_floor = now;	864	now_floor = mn_now;
567	diff = ev_now - now;	865	rtmn_diff = ev_rt_now - mn_now;
568		866
569	if (pipe (sigpipe))	867	if (!(flags & EVFLAG_NOENV)
570	return 0;	868	&& !enable_secure ()
571		869	&& getenv ("LIBEV_FLAGS"))
572	if (methods == EVMETHOD_AUTO)
573	if (!enable_secure () && getenv ("LIBEV_METHODS"))
574	methods = atoi (getenv ("LIBEV_METHODS"));	870	flags = atoi (getenv ("LIBEV_FLAGS"));
575	else
576	methods = EVMETHOD_ANY;
577		871
578	ev_method = 0;	872	if (!(flags & 0x0000ffffUL))
		873	flags \|= ev_recommended_backends ();
		874
		875	backend = 0;
		876	#if EV_USE_PORT
		877	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		878	#endif
579	#if EV_USE_KQUEUE	879	#if EV_USE_KQUEUE
580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
581	#endif	881	#endif
582	#if EV_USE_EPOLL	882	#if EV_USE_EPOLL
583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
584	#endif	884	#endif
585	#if EV_USE_POLL	885	#if EV_USE_POLL
586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
587	#endif	887	#endif
588	#if EV_USE_SELECT	888	#if EV_USE_SELECT
589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
590	#endif	890	#endif
591		891
592	if (ev_method)	892	ev_init (&sigev, sigcb);
		893	ev_set_priority (&sigev, EV_MAXPRI);
		894	}
		895	}
		896
		897	static void
		898	loop_destroy (EV_P)
		899	{
		900	int i;
		901
		902	#if EV_USE_PORT
		903	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		904	#endif
		905	#if EV_USE_KQUEUE
		906	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		907	#endif
		908	#if EV_USE_EPOLL
		909	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		910	#endif
		911	#if EV_USE_POLL
		912	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		913	#endif
		914	#if EV_USE_SELECT
		915	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		916	#endif
		917
		918	for (i = NUMPRI; i--; )
		919	array_free (pending, [i]);
		920
		921	/* have to use the microsoft-never-gets-it-right macro */
		922	array_free (fdchange, EMPTY0);
		923	array_free (timer, EMPTY0);
		924	#if EV_PERIODIC_ENABLE
		925	array_free (periodic, EMPTY0);
		926	#endif
		927	array_free (idle, EMPTY0);
		928	array_free (prepare, EMPTY0);
		929	array_free (check, EMPTY0);
		930
		931	backend = 0;
		932	}
		933
		934	static void
		935	loop_fork (EV_P)
		936	{
		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
		943	#if EV_USE_EPOLL
		944	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		945	#endif
		946
		947	if (ev_is_active (&sigev))
		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;
		963	}
		964
		965	#if EV_MULTIPLICITY
		966	struct ev_loop *
		967	ev_loop_new (unsigned int flags)
		968	{
		969	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		970
		971	memset (loop, 0, sizeof (struct ev_loop));
		972
		973	loop_init (EV_A_ flags);
		974
		975	if (ev_backend (EV_A))
		976	return loop;
		977
		978	return 0;
		979	}
		980
		981	void
		982	ev_loop_destroy (EV_P)
		983	{
		984	loop_destroy (EV_A);
		985	ev_free (loop);
		986	}
		987
		988	void
		989	ev_loop_fork (EV_P)
		990	{
		991	postfork = 1;
		992	}
		993
		994	#endif
		995
		996	#if EV_MULTIPLICITY
		997	struct ev_loop *
		998	ev_default_loop_init (unsigned int flags)
		999	#else
		1000	int
		1001	ev_default_loop (unsigned int flags)
		1002	#endif
		1003	{
		1004	if (sigpipe [0] == sigpipe [1])
		1005	if (pipe (sigpipe))
		1006	return 0;
		1007
		1008	if (!ev_default_loop_ptr)
		1009	{
		1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1012	#else
		1013	ev_default_loop_ptr = 1;
		1014	#endif
		1015
		1016	loop_init (EV_A_ flags);
		1017
		1018	if (ev_backend (EV_A))
593	{	1019	{
594	ev_watcher_init (&sigev, sigcb);
595	ev_set_priority (&sigev, EV_MAXPRI);
596	siginit ();	1020	siginit (EV_A);
597		1021
598	#ifndef WIN32	1022	#ifndef _WIN32
599	ev_signal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
600	ev_set_priority (&childev, EV_MAXPRI);	1024	ev_set_priority (&childev, EV_MAXPRI);
601	ev_signal_start (&childev);	1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
602	#endif	1027	#endif
603	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
604	}	1031	}
605		1032
606	return ev_method;	1033	return ev_default_loop_ptr;
		1034	}
		1035
		1036	void
		1037	ev_default_destroy (void)
		1038	{
		1039	#if EV_MULTIPLICITY
		1040	struct ev_loop *loop = ev_default_loop_ptr;
		1041	#endif
		1042
		1043	#ifndef _WIN32
		1044	ev_ref (EV_A); /* child watcher */
		1045	ev_signal_stop (EV_A_ &childev);
		1046	#endif
		1047
		1048	ev_ref (EV_A); /* signal watcher */
		1049	ev_io_stop (EV_A_ &sigev);
		1050
		1051	close (sigpipe [0]); sigpipe [0] = 0;
		1052	close (sigpipe [1]); sigpipe [1] = 0;
		1053
		1054	loop_destroy (EV_A);
		1055	}
		1056
		1057	void
		1058	ev_default_fork (void)
		1059	{
		1060	#if EV_MULTIPLICITY
		1061	struct ev_loop *loop = ev_default_loop_ptr;
		1062	#endif
		1063
		1064	if (backend)
		1065	postfork = 1;
607	}	1066	}
608		1067
609	/*****************************************************************************/	1068	/*****************************************************************************/
610		1069
611	void	1070	int inline_size
612	ev_fork_prepare (void)	1071	any_pending (EV_P)
613	{	1072	{
614	/* nop */	1073	int pri;
615	}
616		1074
617	void	1075	for (pri = NUMPRI; pri--; )
618	ev_fork_parent (void)	1076	if (pendingcnt [pri])
619	{	1077	return 1;
620	/* nop */
621	}
622		1078
623	void	1079	return 0;
624	ev_fork_child (void)
625	{
626	#if EV_USE_EPOLL
627	if (ev_method == EVMETHOD_EPOLL)
628	epoll_postfork_child ();
629	#endif
630
631	ev_io_stop (&sigev);
632	close (sigpipe [0]);
633	close (sigpipe [1]);
634	pipe (sigpipe);
635	siginit ();
636	}	1080	}
637		1081
638	/*****************************************************************************/	1082	void inline_speed
639
640	static void
641	call_pending (void)	1083	call_pending (EV_P)
642	{	1084	{
643	int pri;	1085	int pri;
644		1086
645	for (pri = NUMPRI; pri--; )	1087	for (pri = NUMPRI; pri--; )
646	while (pendingcnt [pri])	1088	while (pendingcnt [pri])
647	{	1089	{
648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
649		1091
650	if (p->w)	1092	if (expect_true (p->w))
651	{	1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
652	p->w->pending = 0;	1096	p->w->pending = 0;
653	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
654	}	1098	}
655	}	1099	}
656	}	1100	}
657		1101
658	static void	1102	void inline_size
659	timers_reify (void)	1103	timers_reify (EV_P)
660	{	1104	{
661	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
662	{	1106	{
663	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
		1108
		1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
664		1110
665	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
666	if (w->repeat)	1112	if (w->repeat)
667	{	1113	{
668	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
669	w->at = now + w->repeat;	1116	((WT)w)->at += w->repeat;
		1117	if (((WT)w)->at < mn_now)
		1118	((WT)w)->at = mn_now;
		1119
670	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
671	}	1121	}
672	else	1122	else
673	ev_timer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
674		1124
675	event ((W)w, EV_TIMEOUT);	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
676	}	1126	}
677	}	1127	}
678		1128
679	static void	1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
680	periodics_reify (void)	1131	periodics_reify (EV_P)
681	{	1132	{
682	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
683	{	1134	{
684	struct ev_periodic *w = periodics [0];	1135	ev_periodic *w = periodics [0];
		1136
		1137	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
685		1138
686	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
687	if (w->interval)	1140	if (w->reschedule_cb)
688	{	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	{
689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1148	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1149	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
691	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
692	}	1151	}
693	else	1152	else
694	ev_periodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
695		1154
696	event ((W)w, EV_PERIODIC);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
697	}	1156	}
698	}	1157	}
699		1158
700	static void	1159	static void noinline
701	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
702	{	1161	{
703	int i;	1162	int i;
704		1163
705	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
706	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
707	{	1166	{
708	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
709		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
710	if (w->interval)	1171	else if (w->interval)
711	{
712	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1172	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
713
714	if (fabs (diff) >= 1e-4)
715	{
716	ev_periodic_stop (w);
717	ev_periodic_start (w);
718
719	i = 0; /* restart loop, inefficient, but time jumps should be rare */
720	}
721	}
722	}	1173	}
723	}
724		1174
725	static 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
726	time_update_monotonic (void)	1182	time_update_monotonic (EV_P)
727	{	1183	{
728	now = get_clock ();	1184	mn_now = get_clock ();
729		1185
730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
731	{	1187	{
732	ev_now = now + diff;	1188	ev_rt_now = rtmn_diff + mn_now;
733	return 0;	1189	return 0;
734	}	1190	}
735	else	1191	else
736	{	1192	{
737	now_floor = now;	1193	now_floor = mn_now;
738	ev_now = ev_time ();	1194	ev_rt_now = ev_time ();
739	return 1;	1195	return 1;
740	}	1196	}
741	}	1197	}
742		1198
743	static void	1199	void inline_size
744	time_update (void)	1200	time_update (EV_P)
745	{	1201	{
746	int i;	1202	int i;
747		1203
748	#if EV_USE_MONOTONIC	1204	#if EV_USE_MONOTONIC
749	if (expect_true (have_monotonic))	1205	if (expect_true (have_monotonic))
750	{	1206	{
751	if (time_update_monotonic ())	1207	if (time_update_monotonic (EV_A))
752	{	1208	{
753	ev_tstamp odiff = diff;	1209	ev_tstamp odiff = rtmn_diff;
754		1210
755	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; )
756	{	1220	{
757	diff = ev_now - now;	1221	rtmn_diff = ev_rt_now - mn_now;
758		1222
759	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
760	return; /* all is well */	1224	return; /* all is well */
761		1225
762	ev_now = ev_time ();	1226	ev_rt_now = ev_time ();
763	now = get_clock ();	1227	mn_now = get_clock ();
764	now_floor = now;	1228	now_floor = mn_now;
765	}	1229	}
766		1230
		1231	# if EV_PERIODIC_ENABLE
767	periodics_reschedule (diff - odiff);	1232	periodics_reschedule (EV_A);
		1233	# endif
768	/* no timer adjustment, as the monotonic clock doesn't jump */	1234	/* no timer adjustment, as the monotonic clock doesn't jump */
		1235	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
769	}	1236	}
770	}	1237	}
771	else	1238	else
772	#endif	1239	#endif
773	{	1240	{
774	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
775		1242
776	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1243	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
777	{	1244	{
		1245	#if EV_PERIODIC_ENABLE
778	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
779		1248
780	/* 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 */
781	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
782	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
783	}	1252	}
784		1253
785	now = ev_now;	1254	mn_now = ev_rt_now;
786	}	1255	}
787	}	1256	}
788		1257
789	int ev_loop_done;	1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
790		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
791	void ev_loop (int flags)	1273	ev_loop (EV_P_ int flags)
792	{	1274	{
793	double block;
794	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1275	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
795		1278
796	do	1279	while (activecnt)
797	{	1280	{
		1281	/* we might have forked, so reify kernel state if necessary */
		1282	if (expect_false (postfork))
		1283	if (forkcnt)
		1284	{
		1285	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1286	call_pending (EV_A);
		1287	}
		1288
798	/* queue check watchers (and execute them) */	1289	/* queue check watchers (and execute them) */
799	if (expect_false (preparecnt))	1290	if (expect_false (preparecnt))
800	{	1291	{
801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1292	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
802	call_pending ();	1293	call_pending (EV_A);
803	}	1294	}
804		1295
		1296	/* we might have forked, so reify kernel state if necessary */
		1297	if (expect_false (postfork))
		1298	loop_fork (EV_A);
		1299
805	/* update fd-related kernel structures */	1300	/* update fd-related kernel structures */
806	fd_reify ();	1301	fd_reify (EV_A);
807		1302
808	/* calculate blocking time */	1303	/* calculate blocking time */
		1304	{
		1305	double block;
809		1306
810	/* we only need this for !monotonic clockor timers, but as we basically	1307	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
811	always have timers, we just calculate it always */	1308	block = 0.; /* do not block at all */
		1309	else
		1310	{
		1311	/* update time to cancel out callback processing overhead */
812	#if EV_USE_MONOTONIC	1312	#if EV_USE_MONOTONIC
813	if (expect_true (have_monotonic))	1313	if (expect_true (have_monotonic))
814	time_update_monotonic ();	1314	time_update_monotonic (EV_A);
815	else	1315	else
816	#endif	1316	#endif
817	{	1317	{
818	ev_now = ev_time ();	1318	ev_rt_now = ev_time ();
819	now = ev_now;	1319	mn_now = ev_rt_now;
820	}	1320	}
821		1321
822	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
823	block = 0.;
824	else
825	{
826	block = MAX_BLOCKTIME;	1322	block = MAX_BLOCKTIME;
827		1323
828	if (timercnt)	1324	if (timercnt)
829	{	1325	{
830	ev_tstamp to = timers [0]->at - now + method_fudge;	1326	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
831	if (block > to) block = to;	1327	if (block > to) block = to;
832	}	1328	}
833		1329
		1330	#if EV_PERIODIC_ENABLE
834	if (periodiccnt)	1331	if (periodiccnt)
835	{	1332	{
836	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1333	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
837	if (block > to) block = to;	1334	if (block > to) block = to;
838	}	1335	}
		1336	#endif
839		1337
840	if (block < 0.) block = 0.;	1338	if (expect_false (block < 0.)) block = 0.;
841	}	1339	}
842		1340
843	method_poll (block);	1341	backend_poll (EV_A_ block);
		1342	}
844		1343
845	/* update ev_now, do magic */	1344	/* update ev_rt_now, do magic */
846	time_update ();	1345	time_update (EV_A);
847		1346
848	/* queue pending timers and reschedule them */	1347	/* queue pending timers and reschedule them */
849	timers_reify (); /* relative timers called last */	1348	timers_reify (EV_A); /* relative timers called last */
		1349	#if EV_PERIODIC_ENABLE
850	periodics_reify (); /* absolute timers called first */	1350	periodics_reify (EV_A); /* absolute timers called first */
		1351	#endif
851		1352
852	/* queue idle watchers unless io or timers are pending */	1353	/* queue idle watchers unless other events are pending */
853	if (!pendingcnt)	1354	if (idlecnt && !any_pending (EV_A))
854	queue_events ((W *)idles, idlecnt, EV_IDLE);	1355	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
855		1356
856	/* queue check watchers, to be executed first */	1357	/* queue check watchers, to be executed first */
857	if (checkcnt)	1358	if (expect_false (checkcnt))
858	queue_events ((W *)checks, checkcnt, EV_CHECK);	1359	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
859		1360
860	call_pending ();	1361	call_pending (EV_A);
861	}
862	while (!ev_loop_done);
863		1362
864	if (ev_loop_done != 2)	1363	if (expect_false (loop_done))
		1364	break;
		1365	}
		1366
		1367	if (loop_done == EVUNLOOP_ONE)
		1368	loop_done = EVUNLOOP_CANCEL;
		1369	}
		1370
		1371	void
		1372	ev_unloop (EV_P_ int how)
		1373	{
865	ev_loop_done = 0;	1374	loop_done = how;
866	}	1375	}
867		1376
868	/*****************************************************************************/	1377	/*****************************************************************************/
869		1378
870	static void	1379	void inline_size
871	wlist_add (WL *head, WL elem)	1380	wlist_add (WL *head, WL elem)
872	{	1381	{
873	elem->next = *head;	1382	elem->next = *head;
874	*head = elem;	1383	*head = elem;
875	}	1384	}
876		1385
877	static void	1386	void inline_size
878	wlist_del (WL *head, WL elem)	1387	wlist_del (WL *head, WL elem)
879	{	1388	{
880	while (*head)	1389	while (*head)
881	{	1390	{
882	if (*head == elem)	1391	if (*head == elem)
…		…
887		1396
888	head = &(*head)->next;	1397	head = &(*head)->next;
889	}	1398	}
890	}	1399	}
891		1400
892	static void	1401	void inline_speed
893	ev_clear_pending (W w)	1402	ev_clear_pending (EV_P_ W w)
894	{	1403	{
895	if (w->pending)	1404	if (w->pending)
896	{	1405	{
897	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1406	pendings [ABSPRI (w)][w->pending - 1].w = 0;
898	w->pending = 0;	1407	w->pending = 0;
899	}	1408	}
900	}	1409	}
901		1410
902	static void	1411	void inline_speed
903	ev_start (W w, int active)	1412	ev_start (EV_P_ W w, int active)
904	{	1413	{
905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1414	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1415	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
907		1416
908	w->active = active;	1417	w->active = active;
		1418	ev_ref (EV_A);
909	}	1419	}
910		1420
911	static void	1421	void inline_size
912	ev_stop (W w)	1422	ev_stop (EV_P_ W w)
913	{	1423	{
		1424	ev_unref (EV_A);
914	w->active = 0;	1425	w->active = 0;
915	}	1426	}
916		1427
917	/*****************************************************************************/	1428	/*****************************************************************************/
918		1429
919	void	1430	void
920	ev_io_start (struct ev_io *w)	1431	ev_io_start (EV_P_ ev_io *w)
921	{	1432	{
922	int fd = w->fd;	1433	int fd = w->fd;
923		1434
924	if (ev_is_active (w))	1435	if (expect_false (ev_is_active (w)))
925	return;	1436	return;
926		1437
927	assert (("ev_io_start called with negative fd", fd >= 0));	1438	assert (("ev_io_start called with negative fd", fd >= 0));
928		1439
929	ev_start ((W)w, 1);	1440	ev_start (EV_A_ (W)w, 1);
930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1441	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
931	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1442	wlist_add ((WL *)&anfds[fd].head, (WL)w);
932		1443
933	fd_change (fd);	1444	fd_change (EV_A_ fd);
934	}	1445	}
935		1446
936	void	1447	void
937	ev_io_stop (struct ev_io *w)	1448	ev_io_stop (EV_P_ ev_io *w)
938	{	1449	{
939	ev_clear_pending ((W)w);	1450	ev_clear_pending (EV_A_ (W)w);
940	if (!ev_is_active (w))	1451	if (expect_false (!ev_is_active (w)))
941	return;	1452	return;
		1453
		1454	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
942		1455
943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1456	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
944	ev_stop ((W)w);	1457	ev_stop (EV_A_ (W)w);
945		1458
946	fd_change (w->fd);	1459	fd_change (EV_A_ w->fd);
947	}	1460	}
948		1461
949	void	1462	void
950	ev_timer_start (struct ev_timer *w)	1463	ev_timer_start (EV_P_ ev_timer *w)
951	{	1464	{
952	if (ev_is_active (w))	1465	if (expect_false (ev_is_active (w)))
953	return;	1466	return;
954		1467
955	w->at += now;	1468	((WT)w)->at += mn_now;
956		1469
957	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1470	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
958		1471
959	ev_start ((W)w, ++timercnt);	1472	ev_start (EV_A_ (W)w, ++timercnt);
960	array_needsize (timers, timermax, timercnt, );	1473	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
961	timers [timercnt - 1] = w;	1474	timers [timercnt - 1] = w;
962	upheap ((WT *)timers, timercnt - 1);	1475	upheap ((WT *)timers, timercnt - 1);
963	}
964		1476
		1477	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1478	}
		1479
965	void	1480	void
966	ev_timer_stop (struct ev_timer *w)	1481	ev_timer_stop (EV_P_ ev_timer *w)
967	{	1482	{
968	ev_clear_pending ((W)w);	1483	ev_clear_pending (EV_A_ (W)w);
969	if (!ev_is_active (w))	1484	if (expect_false (!ev_is_active (w)))
970	return;	1485	return;
971		1486
		1487	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1488
972	if (w->active < timercnt--)	1489	if (expect_true (((W)w)->active < timercnt--))
973	{	1490	{
974	timers [w->active - 1] = timers [timercnt];	1491	timers [((W)w)->active - 1] = timers [timercnt];
975	downheap ((WT *)timers, timercnt, w->active - 1);	1492	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
976	}	1493	}
977		1494
978	w->at = w->repeat;	1495	((WT)w)->at -= mn_now;
979		1496
980	ev_stop ((W)w);	1497	ev_stop (EV_A_ (W)w);
981	}	1498	}
982		1499
983	void	1500	void
984	ev_timer_again (struct ev_timer *w)	1501	ev_timer_again (EV_P_ ev_timer *w)
985	{	1502	{
986	if (ev_is_active (w))	1503	if (ev_is_active (w))
987	{	1504	{
988	if (w->repeat)	1505	if (w->repeat)
989	{	1506	{
990	w->at = now + w->repeat;	1507	((WT)w)->at = mn_now + w->repeat;
991	downheap ((WT *)timers, timercnt, w->active - 1);	1508	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
992	}	1509	}
993	else	1510	else
994	ev_timer_stop (w);	1511	ev_timer_stop (EV_A_ w);
995	}	1512	}
996	else if (w->repeat)	1513	else if (w->repeat)
		1514	{
		1515	w->at = w->repeat;
997	ev_timer_start (w);	1516	ev_timer_start (EV_A_ w);
		1517	}
998	}	1518	}
999		1519
		1520	#if EV_PERIODIC_ENABLE
1000	void	1521	void
1001	ev_periodic_start (struct ev_periodic *w)	1522	ev_periodic_start (EV_P_ ev_periodic *w)
1002	{	1523	{
1003	if (ev_is_active (w))	1524	if (expect_false (ev_is_active (w)))
1004	return;	1525	return;
1005		1526
		1527	if (w->reschedule_cb)
		1528	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1529	else if (w->interval)
		1530	{
1006	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1531	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1007
1008	/* this formula differs from the one in periodic_reify because we do not always round up */	1532	/* this formula differs from the one in periodic_reify because we do not always round up */
1009	if (w->interval)
1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1533	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1534	}
1011		1535
1012	ev_start ((W)w, ++periodiccnt);	1536	ev_start (EV_A_ (W)w, ++periodiccnt);
1013	array_needsize (periodics, periodicmax, periodiccnt, );	1537	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1014	periodics [periodiccnt - 1] = w;	1538	periodics [periodiccnt - 1] = w;
1015	upheap ((WT *)periodics, periodiccnt - 1);	1539	upheap ((WT *)periodics, periodiccnt - 1);
1016	}
1017		1540
		1541	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1542	}
		1543
1018	void	1544	void
1019	ev_periodic_stop (struct ev_periodic *w)	1545	ev_periodic_stop (EV_P_ ev_periodic *w)
1020	{	1546	{
1021	ev_clear_pending ((W)w);	1547	ev_clear_pending (EV_A_ (W)w);
1022	if (!ev_is_active (w))	1548	if (expect_false (!ev_is_active (w)))
1023	return;	1549	return;
1024		1550
		1551	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1552
1025	if (w->active < periodiccnt--)	1553	if (expect_true (((W)w)->active < periodiccnt--))
1026	{	1554	{
1027	periodics [w->active - 1] = periodics [periodiccnt];	1555	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1028	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1556	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1029	}	1557	}
1030		1558
1031	ev_stop ((W)w);	1559	ev_stop (EV_A_ (W)w);
1032	}	1560	}
		1561
		1562	void
		1563	ev_periodic_again (EV_P_ ev_periodic *w)
		1564	{
		1565	/* TODO: use adjustheap and recalculation */
		1566	ev_periodic_stop (EV_A_ w);
		1567	ev_periodic_start (EV_A_ w);
		1568	}
		1569	#endif
1033		1570
1034	#ifndef SA_RESTART	1571	#ifndef SA_RESTART
1035	# define SA_RESTART 0	1572	# define SA_RESTART 0
1036	#endif	1573	#endif
1037		1574
1038	void	1575	void
1039	ev_signal_start (struct ev_signal *w)	1576	ev_signal_start (EV_P_ ev_signal *w)
1040	{	1577	{
		1578	#if EV_MULTIPLICITY
		1579	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1580	#endif
1041	if (ev_is_active (w))	1581	if (expect_false (ev_is_active (w)))
1042	return;	1582	return;
1043		1583
1044	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1584	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1045		1585
1046	ev_start ((W)w, 1);	1586	ev_start (EV_A_ (W)w, 1);
1047	array_needsize (signals, signalmax, w->signum, signals_init);	1587	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1588	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1049		1589
1050	if (!w->next)	1590	if (!((WL)w)->next)
1051	{	1591	{
		1592	#if _WIN32
		1593	signal (w->signum, sighandler);
		1594	#else
1052	struct sigaction sa;	1595	struct sigaction sa;
1053	sa.sa_handler = sighandler;	1596	sa.sa_handler = sighandler;
1054	sigfillset (&sa.sa_mask);	1597	sigfillset (&sa.sa_mask);
1055	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1598	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1056	sigaction (w->signum, &sa, 0);	1599	sigaction (w->signum, &sa, 0);
		1600	#endif
1057	}	1601	}
1058	}	1602	}
1059		1603
1060	void	1604	void
1061	ev_signal_stop (struct ev_signal *w)	1605	ev_signal_stop (EV_P_ ev_signal *w)
1062	{	1606	{
1063	ev_clear_pending ((W)w);	1607	ev_clear_pending (EV_A_ (W)w);
1064	if (!ev_is_active (w))	1608	if (expect_false (!ev_is_active (w)))
1065	return;	1609	return;
1066		1610
1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1611	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1068	ev_stop ((W)w);	1612	ev_stop (EV_A_ (W)w);
1069		1613
1070	if (!signals [w->signum - 1].head)	1614	if (!signals [w->signum - 1].head)
1071	signal (w->signum, SIG_DFL);	1615	signal (w->signum, SIG_DFL);
1072	}	1616	}
1073		1617
1074	void	1618	void
		1619	ev_child_start (EV_P_ ev_child *w)
		1620	{
		1621	#if EV_MULTIPLICITY
		1622	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1623	#endif
		1624	if (expect_false (ev_is_active (w)))
		1625	return;
		1626
		1627	ev_start (EV_A_ (W)w, 1);
		1628	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1629	}
		1630
		1631	void
		1632	ev_child_stop (EV_P_ ev_child *w)
		1633	{
		1634	ev_clear_pending (EV_A_ (W)w);
		1635	if (expect_false (!ev_is_active (w)))
		1636	return;
		1637
		1638	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1639	ev_stop (EV_A_ (W)w);
		1640	}
		1641
		1642	#if EV_STAT_ENABLE
		1643
		1644	# ifdef _WIN32
		1645	# undef lstat
		1646	# define lstat(a,b) _stati64 (a,b)
		1647	# endif
		1648
		1649	#define DEF_STAT_INTERVAL 5.0074891
		1650	#define MIN_STAT_INTERVAL 0.1074891
		1651
		1652	void
		1653	ev_stat_stat (EV_P_ ev_stat *w)
		1654	{
		1655	if (lstat (w->path, &w->attr) < 0)
		1656	w->attr.st_nlink = 0;
		1657	else if (!w->attr.st_nlink)
		1658	w->attr.st_nlink = 1;
		1659	}
		1660
		1661	static void
		1662	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1663	{
		1664	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		1665
		1666	/* we copy this here each the time so that */
		1667	/* prev has the old value when the callback gets invoked */
		1668	w->prev = w->attr;
		1669	ev_stat_stat (EV_A_ w);
		1670
		1671	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1672	ev_feed_event (EV_A_ w, EV_STAT);
		1673	}
		1674
		1675	void
		1676	ev_stat_start (EV_P_ ev_stat *w)
		1677	{
		1678	if (expect_false (ev_is_active (w)))
		1679	return;
		1680
		1681	/* since we use memcmp, we need to clear any padding data etc. */
		1682	memset (&w->prev, 0, sizeof (ev_statdata));
		1683	memset (&w->attr, 0, sizeof (ev_statdata));
		1684
		1685	ev_stat_stat (EV_A_ w);
		1686
		1687	if (w->interval < MIN_STAT_INTERVAL)
		1688	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1689
		1690	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1691	ev_set_priority (&w->timer, ev_priority (w));
		1692	ev_timer_start (EV_A_ &w->timer);
		1693
		1694	ev_start (EV_A_ (W)w, 1);
		1695	}
		1696
		1697	void
		1698	ev_stat_stop (EV_P_ ev_stat *w)
		1699	{
		1700	ev_clear_pending (EV_A_ (W)w);
		1701	if (expect_false (!ev_is_active (w)))
		1702	return;
		1703
		1704	ev_timer_stop (EV_A_ &w->timer);
		1705
		1706	ev_stop (EV_A_ (W)w);
		1707	}
		1708	#endif
		1709
		1710	void
1075	ev_idle_start (struct ev_idle *w)	1711	ev_idle_start (EV_P_ ev_idle *w)
1076	{	1712	{
1077	if (ev_is_active (w))	1713	if (expect_false (ev_is_active (w)))
1078	return;	1714	return;
1079		1715
1080	ev_start ((W)w, ++idlecnt);	1716	ev_start (EV_A_ (W)w, ++idlecnt);
1081	array_needsize (idles, idlemax, idlecnt, );	1717	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1082	idles [idlecnt - 1] = w;	1718	idles [idlecnt - 1] = w;
1083	}	1719	}
1084		1720
1085	void	1721	void
1086	ev_idle_stop (struct ev_idle *w)	1722	ev_idle_stop (EV_P_ ev_idle *w)
1087	{	1723	{
1088	ev_clear_pending ((W)w);	1724	ev_clear_pending (EV_A_ (W)w);
1089	if (ev_is_active (w))	1725	if (expect_false (!ev_is_active (w)))
1090	return;	1726	return;
1091		1727
		1728	{
		1729	int active = ((W)w)->active;
1092	idles [w->active - 1] = idles [--idlecnt];	1730	idles [active - 1] = idles [--idlecnt];
		1731	((W)idles [active - 1])->active = active;
		1732	}
		1733
1093	ev_stop ((W)w);	1734	ev_stop (EV_A_ (W)w);
1094	}	1735	}
1095		1736
1096	void	1737	void
1097	ev_prepare_start (struct ev_prepare *w)	1738	ev_prepare_start (EV_P_ ev_prepare *w)
1098	{	1739	{
1099	if (ev_is_active (w))	1740	if (expect_false (ev_is_active (w)))
1100	return;	1741	return;
1101		1742
1102	ev_start ((W)w, ++preparecnt);	1743	ev_start (EV_A_ (W)w, ++preparecnt);
1103	array_needsize (prepares, preparemax, preparecnt, );	1744	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1104	prepares [preparecnt - 1] = w;	1745	prepares [preparecnt - 1] = w;
1105	}	1746	}
1106		1747
1107	void	1748	void
1108	ev_prepare_stop (struct ev_prepare *w)	1749	ev_prepare_stop (EV_P_ ev_prepare *w)
1109	{	1750	{
1110	ev_clear_pending ((W)w);	1751	ev_clear_pending (EV_A_ (W)w);
1111	if (ev_is_active (w))	1752	if (expect_false (!ev_is_active (w)))
1112	return;	1753	return;
1113		1754
		1755	{
		1756	int active = ((W)w)->active;
1114	prepares [w->active - 1] = prepares [--preparecnt];	1757	prepares [active - 1] = prepares [--preparecnt];
		1758	((W)prepares [active - 1])->active = active;
		1759	}
		1760
1115	ev_stop ((W)w);	1761	ev_stop (EV_A_ (W)w);
1116	}	1762	}
1117		1763
1118	void	1764	void
1119	ev_check_start (struct ev_check *w)	1765	ev_check_start (EV_P_ ev_check *w)
1120	{	1766	{
1121	if (ev_is_active (w))	1767	if (expect_false (ev_is_active (w)))
1122	return;	1768	return;
1123		1769
1124	ev_start ((W)w, ++checkcnt);	1770	ev_start (EV_A_ (W)w, ++checkcnt);
1125	array_needsize (checks, checkmax, checkcnt, );	1771	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1126	checks [checkcnt - 1] = w;	1772	checks [checkcnt - 1] = w;
1127	}	1773	}
1128		1774
1129	void	1775	void
1130	ev_check_stop (struct ev_check *w)	1776	ev_check_stop (EV_P_ ev_check *w)
1131	{	1777	{
1132	ev_clear_pending ((W)w);	1778	ev_clear_pending (EV_A_ (W)w);
1133	if (ev_is_active (w))	1779	if (expect_false (!ev_is_active (w)))
1134	return;	1780	return;
1135		1781
		1782	{
		1783	int active = ((W)w)->active;
1136	checks [w->active - 1] = checks [--checkcnt];	1784	checks [active - 1] = checks [--checkcnt];
		1785	((W)checks [active - 1])->active = active;
		1786	}
		1787
1137	ev_stop ((W)w);	1788	ev_stop (EV_A_ (W)w);
1138	}	1789	}
1139		1790
1140	void	1791	#if EV_EMBED_ENABLE
1141	ev_child_start (struct ev_child *w)	1792	void noinline
		1793	ev_embed_sweep (EV_P_ ev_embed *w)
1142	{	1794	{
		1795	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1796	}
		1797
		1798	static void
		1799	embed_cb (EV_P_ ev_io *io, int revents)
		1800	{
		1801	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		1802
1143	if (ev_is_active (w))	1803	if (ev_cb (w))
1144	return;	1804	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1805	else
		1806	ev_embed_sweep (loop, w);
		1807	}
1145		1808
		1809	void
		1810	ev_embed_start (EV_P_ ev_embed *w)
		1811	{
		1812	if (expect_false (ev_is_active (w)))
		1813	return;
		1814
		1815	{
		1816	struct ev_loop *loop = w->loop;
		1817	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1818	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1819	}
		1820
		1821	ev_set_priority (&w->io, ev_priority (w));
		1822	ev_io_start (EV_A_ &w->io);
		1823
1146	ev_start ((W)w, 1);	1824	ev_start (EV_A_ (W)w, 1);
1147	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1148	}	1825	}
1149		1826
1150	void	1827	void
1151	ev_child_stop (struct ev_child *w)	1828	ev_embed_stop (EV_P_ ev_embed *w)
1152	{	1829	{
1153	ev_clear_pending ((W)w);	1830	ev_clear_pending (EV_A_ (W)w);
1154	if (ev_is_active (w))	1831	if (expect_false (!ev_is_active (w)))
1155	return;	1832	return;
1156		1833
1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1834	ev_io_stop (EV_A_ &w->io);
		1835
1158	ev_stop ((W)w);	1836	ev_stop (EV_A_ (W)w);
1159	}	1837	}
		1838	#endif
		1839
		1840	#if EV_FORK_ENABLE
		1841	void
		1842	ev_fork_start (EV_P_ ev_fork *w)
		1843	{
		1844	if (expect_false (ev_is_active (w)))
		1845	return;
		1846
		1847	ev_start (EV_A_ (W)w, ++forkcnt);
		1848	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		1849	forks [forkcnt - 1] = w;
		1850	}
		1851
		1852	void
		1853	ev_fork_stop (EV_P_ ev_fork *w)
		1854	{
		1855	ev_clear_pending (EV_A_ (W)w);
		1856	if (expect_false (!ev_is_active (w)))
		1857	return;
		1858
		1859	{
		1860	int active = ((W)w)->active;
		1861	forks [active - 1] = forks [--forkcnt];
		1862	((W)forks [active - 1])->active = active;
		1863	}
		1864
		1865	ev_stop (EV_A_ (W)w);
		1866	}
		1867	#endif
1160		1868
1161	/*****************************************************************************/	1869	/*****************************************************************************/
1162		1870
1163	struct ev_once	1871	struct ev_once
1164	{	1872	{
1165	struct ev_io io;	1873	ev_io io;
1166	struct ev_timer to;	1874	ev_timer to;
1167	void (cb)(int revents, void arg);	1875	void (cb)(int revents, void arg);
1168	void *arg;	1876	void *arg;
1169	};	1877	};
1170		1878
1171	static void	1879	static void
1172	once_cb (struct ev_once *once, int revents)	1880	once_cb (EV_P_ struct ev_once *once, int revents)
1173	{	1881	{
1174	void (cb)(int revents, void arg) = once->cb;	1882	void (cb)(int revents, void arg) = once->cb;
1175	void *arg = once->arg;	1883	void *arg = once->arg;
1176		1884
1177	ev_io_stop (&once->io);	1885	ev_io_stop (EV_A_ &once->io);
1178	ev_timer_stop (&once->to);	1886	ev_timer_stop (EV_A_ &once->to);
1179	free (once);	1887	ev_free (once);
1180		1888
1181	cb (revents, arg);	1889	cb (revents, arg);
1182	}	1890	}
1183		1891
1184	static void	1892	static void
1185	once_cb_io (struct ev_io *w, int revents)	1893	once_cb_io (EV_P_ ev_io *w, int revents)
1186	{	1894	{
1187	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1895	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1188	}	1896	}
1189		1897
1190	static void	1898	static void
1191	once_cb_to (struct ev_timer *w, int revents)	1899	once_cb_to (EV_P_ ev_timer *w, int revents)
1192	{	1900	{
1193	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1901	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1194	}	1902	}
1195		1903
1196	void	1904	void
1197	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1905	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1198	{	1906	{
1199	struct ev_once *once = malloc (sizeof (struct ev_once));	1907	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1200		1908
1201	if (!once)	1909	if (expect_false (!once))
		1910	{
1202	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1911	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1203	else	1912	return;
1204	{	1913	}
		1914
1205	once->cb = cb;	1915	once->cb = cb;
1206	once->arg = arg;	1916	once->arg = arg;
1207		1917
1208	ev_watcher_init (&once->io, once_cb_io);	1918	ev_init (&once->io, once_cb_io);
1209	if (fd >= 0)	1919	if (fd >= 0)
1210	{	1920	{
1211	ev_io_set (&once->io, fd, events);	1921	ev_io_set (&once->io, fd, events);
1212	ev_io_start (&once->io);	1922	ev_io_start (EV_A_ &once->io);
1213	}	1923	}
1214		1924
1215	ev_watcher_init (&once->to, once_cb_to);	1925	ev_init (&once->to, once_cb_to);
1216	if (timeout >= 0.)	1926	if (timeout >= 0.)
1217	{	1927	{
1218	ev_timer_set (&once->to, timeout, 0.);	1928	ev_timer_set (&once->to, timeout, 0.);
1219	ev_timer_start (&once->to);	1929	ev_timer_start (EV_A_ &once->to);
1220	}
1221	}
1222	}
1223
1224	/*****************************************************************************/
1225
1226	#if 0
1227
1228	struct ev_io wio;
1229
1230	static void
1231	sin_cb (struct ev_io *w, int revents)
1232	{
1233	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1234	}
1235
1236	static void
1237	ocb (struct ev_timer *w, int revents)
1238	{
1239	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1240	ev_timer_stop (w);
1241	ev_timer_start (w);
1242	}
1243
1244	static void
1245	scb (struct ev_signal *w, int revents)
1246	{
1247	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1248	ev_io_stop (&wio);
1249	ev_io_start (&wio);
1250	}
1251
1252	static void
1253	gcb (struct ev_signal *w, int revents)
1254	{
1255	fprintf (stderr, "generic %x\n", revents);
1256
1257	}
1258
1259	int main (void)
1260	{
1261	ev_init (0);
1262
1263	ev_io_init (&wio, sin_cb, 0, EV_READ);
1264	ev_io_start (&wio);
1265
1266	struct ev_timer t[10000];
1267
1268	#if 0
1269	int i;
1270	for (i = 0; i < 10000; ++i)
1271	{	1930	}
1272	struct ev_timer *w = t + i;
1273	ev_watcher_init (w, ocb, i);
1274	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1275	ev_timer_start (w);
1276	if (drand48 () < 0.5)
1277	ev_timer_stop (w);
1278	}
1279	#endif
1280
1281	struct ev_timer t1;
1282	ev_timer_init (&t1, ocb, 5, 10);
1283	ev_timer_start (&t1);
1284
1285	struct ev_signal sig;
1286	ev_signal_init (&sig, scb, SIGQUIT);
1287	ev_signal_start (&sig);
1288
1289	struct ev_check cw;
1290	ev_check_init (&cw, gcb);
1291	ev_check_start (&cw);
1292
1293	struct ev_idle iw;
1294	ev_idle_init (&iw, gcb);
1295	ev_idle_start (&iw);
1296
1297	ev_loop (0);
1298
1299	return 0;
1300	}	1931	}
1301		1932
		1933	#ifdef __cplusplus
		1934	}
1302	#endif	1935	#endif
1303		1936
1304
1305
1306

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Comparing libev/ev.c (file contents): Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs. Revision 1.147 by root, Tue Nov 27 10:59:11 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs.
Revision 1.147 by root, Tue Nov 27 10:59:11 2007 UTC