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

Comparing libev/ev.c (file contents):
Revision 1.44 by root, Fri Nov 2 20:59:14 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
		36	#ifndef EV_STANDALONE
31	#if EV_USE_CONFIG_H	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>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	111	#include <time.h>
50		112
		113	#include <signal.h>
		114
		115	#ifndef _WIN32
		116	# include <sys/time.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
		124	# endif
		125	#endif
		126
51	/**/	127	/**/
52		128
53	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
54	# 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
55	#endif	135	#endif
56		136
57	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
59	#endif	139	#endif
60		140
61	#ifndef EV_USE_POLL	141	#ifndef EV_USE_POLL
62	# 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
63	#endif	147	#endif
64		148
65	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
66	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
67	#endif	151	#endif
68		152
69	#ifndef EV_USE_KQUEUE	153	#ifndef EV_USE_KQUEUE
70	# define EV_USE_KQUEUE 0	154	# define EV_USE_KQUEUE 0
71	#endif	155	#endif
72		156
73	#ifndef EV_USE_REALTIME	157	#ifndef EV_USE_PORT
74	# define EV_USE_REALTIME 1	158	# define EV_USE_PORT 0
75	#endif	159	#endif
76		160
77	/**/	161	/**/
78		162
79	#ifndef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
…		…
84	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
85	# undef EV_USE_REALTIME	169	# undef EV_USE_REALTIME
86	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
87	#endif	171	#endif
88		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
89	/**/	177	/**/
90		178
91	#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) */
92	#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) */
93	#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 */
94	/#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 */
95		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
96	#include "ev.h"	187	# include "ev.h"
		188	#endif
97		189
98	#if __GNUC__ >= 3	190	#if __GNUC__ >= 3
99	# 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
100	# 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
101	#else	200	#else
102	# define expect(expr,value) (expr)	201	# define expect(expr,value) (expr)
		202	# define inline_speed static
103	# define inline static	203	# define inline_size static
		204	# define noinline
104	#endif	205	#endif
105		206
106	#define expect_false(expr) expect ((expr) != 0, 0)	207	#define expect_false(expr) expect ((expr) != 0, 0)
107	#define expect_true(expr) expect ((expr) != 0, 1)	208	#define expect_true(expr) expect ((expr) != 0, 1)
108		209
109	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
110	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
111		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
112	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
113	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
114	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
115		219
116	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
117	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
118	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
119		315
120	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
121		317
122	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
123	static void (*method_modify)(int fd, int oev, int nev);
124	static void (*method_poll)(ev_tstamp timeout);
125		319
126	/*****************************************************************************/	320	/*****************************************************************************/
127		321
128	ev_tstamp	322	ev_tstamp
129	ev_time (void)	323	ev_time (void)
…		…
137	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
138	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
139	#endif	333	#endif
140	}	334	}
141		335
142	static ev_tstamp	336	ev_tstamp inline_size
143	get_clock (void)	337	get_clock (void)
144	{	338	{
145	#if EV_USE_MONOTONIC	339	#if EV_USE_MONOTONIC
146	if (expect_true (have_monotonic))	340	if (expect_true (have_monotonic))
147	{	341	{
…		…
152	#endif	346	#endif
153		347
154	return ev_time ();	348	return ev_time ();
155	}	349	}
156		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
157	#define array_roundsize(base,n) ((n) \| 4 & ~3)	359	#define array_roundsize(type,n) (((n) \| 4) & ~3)
158		360
159	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
160	if (expect_false ((cnt) > cur)) \	362	if (expect_false ((cnt) > cur)) \
161	{ \	363	{ \
162	int newcnt = cur; \	364	int newcnt = cur; \
163	do \	365	do \
164	{ \	366	{ \
165	newcnt = array_roundsize (base, newcnt << 1); \	367	newcnt = array_roundsize (type, newcnt << 1); \
166	} \	368	} \
167	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
168	\	370	\
169	base = realloc (base, sizeof (base) (newcnt)); \	371	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
170	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
171	cur = newcnt; \	373	cur = newcnt; \
172	}	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;
173		386
174	/*****************************************************************************/	387	/*****************************************************************************/
175		388
176	typedef struct	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
177	{	391	{
178	struct ev_io *head;	392	W w_ = (W)w;
179	unsigned char events;
180	unsigned char reify;
181	} ANFD;
182		393
183	static ANFD *anfds;	394	if (expect_false (w_->pending))
184	static int anfdmax;	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		397	return;
		398	}
185		399
186	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
187	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
188	{	419	{
189	while (count--)	420	while (count--)
190	{	421	{
191	base->head = 0;	422	base->head = 0;
…		…
194		425
195	++base;	426	++base;
196	}	427	}
197	}	428	}
198		429
199	typedef struct	430	void inline_speed
200	{
201	W w;
202	int events;
203	} ANPENDING;
204
205	static ANPENDING *pendings [NUMPRI];
206	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
207
208	static void
209	event (W w, int events)
210	{
211	if (w->pending)
212	{
213	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
214	return;
215	}
216
217	w->pending = ++pendingcnt [ABSPRI (w)];
218	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
219	pendings [ABSPRI (w)][w->pending - 1].w = w;
220	pendings [ABSPRI (w)][w->pending - 1].events = events;
221	}
222
223	static void
224	queue_events (W *events, int eventcnt, int type)
225	{
226	int i;
227
228	for (i = 0; i < eventcnt; ++i)
229	event (events [i], type);
230	}
231
232	static void
233	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
234	{	432	{
235	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
236	struct ev_io *w;	434	ev_io *w;
237		435
238	for (w = anfd->head; w; w = w->next)	436	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
239	{	437	{
240	int ev = w->events & events;	438	int ev = w->events & revents;
241		439
242	if (ev)	440	if (ev)
243	event ((W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
244	}	442	}
245	}	443	}
246		444
247	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
248		450
249	static int *fdchanges;	451	void inline_size
250	static int fdchangemax, fdchangecnt;	452	fd_reify (EV_P)
251
252	static void
253	fd_reify (void)
254	{	453	{
255	int i;	454	int i;
256		455
257	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
258	{	457	{
259	int fd = fdchanges [i];	458	int fd = fdchanges [i];
260	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
261	struct ev_io *w;	460	ev_io *w;
262		461
263	int events = 0;	462	int events = 0;
264		463
265	for (w = anfd->head; w; w = w->next)	464	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
266	events \|= w->events;	465	events \|= w->events;
267		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
268	anfd->reify = 0;	476	anfd->reify = 0;
269		477
270	if (anfd->events != events)
271	{
272	method_modify (fd, anfd->events, events);	478	backend_modify (EV_A_ fd, anfd->events, events);
273	anfd->events = events;	479	anfd->events = events;
274	}
275	}	480	}
276		481
277	fdchangecnt = 0;	482	fdchangecnt = 0;
278	}	483	}
279		484
280	static void	485	void inline_size
281	fd_change (int fd)	486	fd_change (EV_P_ int fd)
282	{	487	{
283	if (anfds [fd].reify \|\| fdchangecnt < 0)	488	if (expect_false (anfds [fd].reify))
284	return;	489	return;
285		490
286	anfds [fd].reify = 1;	491	anfds [fd].reify = 1;
287		492
288	++fdchangecnt;	493	++fdchangecnt;
289	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
290	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
291	}	496	}
292		497
293	static void	498	void inline_speed
294	fd_kill (int fd)	499	fd_kill (EV_P_ int fd)
295	{	500	{
296	struct ev_io *w;	501	ev_io *w;
297		502
298	printf ("killing fd %d\n", fd);//D
299	while ((w = anfds [fd].head))	503	while ((w = (ev_io *)anfds [fd].head))
300	{	504	{
301	ev_io_stop (w);	505	ev_io_stop (EV_A_ w);
302	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);	506	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
303	}	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
304	}	518	}
305		519
306	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
307	static void	521	static void noinline
308	fd_ebadf (void)	522	fd_ebadf (EV_P)
309	{	523	{
310	int fd;	524	int fd;
311		525
312	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
313	if (anfds [fd].events)	527	if (anfds [fd].events)
314	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
315	fd_kill (fd);	529	fd_kill (EV_A_ fd);
316	}	530	}
317		531
318	/* 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 */
319	static void	533	static void noinline
320	fd_enomem (void)	534	fd_enomem (EV_P)
321	{	535	{
322	int fd = anfdmax;	536	int fd;
323		537
324	while (fd--)	538	for (fd = anfdmax; fd--; )
325	if (anfds [fd].events)	539	if (anfds [fd].events)
326	{	540	{
327	close (fd);
328	fd_kill (fd);	541	fd_kill (EV_A_ fd);
329	return;	542	return;
330	}	543	}
331	}	544	}
332		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
333	/*****************************************************************************/	561	/*****************************************************************************/
334		562
335	static struct ev_timer **timers;	563	void inline_speed
336	static int timermax, timercnt;
337
338	static struct ev_periodic **periodics;
339	static int periodicmax, periodiccnt;
340
341	static void
342	upheap (WT *timers, int k)	564	upheap (WT *heap, int k)
343	{	565	{
344	WT w = timers [k];	566	WT w = heap [k];
345		567
346	while (k && timers [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
347	{	569	{
348	timers [k] = timers [k >> 1];	570	heap [k] = heap [k >> 1];
349	timers [k]->active = k + 1;	571	((W)heap [k])->active = k + 1;
350	k >>= 1;	572	k >>= 1;
351	}	573	}
352		574
353	timers [k] = w;	575	heap [k] = w;
354	timers [k]->active = k + 1;	576	((W)heap [k])->active = k + 1;
355		577
356	}	578	}
357		579
358	static void	580	void inline_speed
359	downheap (WT *timers, int N, int k)	581	downheap (WT *heap, int N, int k)
360	{	582	{
361	WT w = timers [k];	583	WT w = heap [k];
362		584
363	while (k < (N >> 1))	585	while (k < (N >> 1))
364	{	586	{
365	int j = k << 1;	587	int j = k << 1;
366		588
367	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
368	++j;	590	++j;
369		591
370	if (w->at <= timers [j]->at)	592	if (w->at <= heap [j]->at)
371	break;	593	break;
372		594
373	timers [k] = timers [j];	595	heap [k] = heap [j];
374	timers [k]->active = k + 1;	596	((W)heap [k])->active = k + 1;
375	k = j;	597	k = j;
376	}	598	}
377		599
378	timers [k] = w;	600	heap [k] = w;
379	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);
380	}	609	}
381		610
382	/*****************************************************************************/	611	/*****************************************************************************/
383		612
384	typedef struct	613	typedef struct
385	{	614	{
386	struct ev_signal *head;	615	WL head;
387	sig_atomic_t volatile gotsig;	616	sig_atomic_t volatile gotsig;
388	} ANSIG;	617	} ANSIG;
389		618
390	static ANSIG *signals;	619	static ANSIG *signals;
391	static int signalmax;	620	static int signalmax;
392		621
393	static int sigpipe [2];	622	static int sigpipe [2];
394	static sig_atomic_t volatile gotsig;	623	static sig_atomic_t volatile gotsig;
395	static struct ev_io sigev;	624	static ev_io sigev;
396		625
397	static void	626	void inline_size
398	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
399	{	628	{
400	while (count--)	629	while (count--)
401	{	630	{
402	base->head = 0;	631	base->head = 0;
…		…
407	}	636	}
408		637
409	static void	638	static void
410	sighandler (int signum)	639	sighandler (int signum)
411	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
412	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
413		646
414	if (!gotsig)	647	if (!gotsig)
415	{	648	{
		649	int old_errno = errno;
416	gotsig = 1;	650	gotsig = 1;
417	write (sigpipe [1], &signum, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
418	}	653	}
		654	}
		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);
419	}	674	}
420		675
421	static void	676	static void
422	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
423	{	678	{
424	struct ev_signal *w;
425	int signum;	679	int signum;
426		680
427	read (sigpipe [0], &revents, 1);	681	read (sigpipe [0], &revents, 1);
428	gotsig = 0;	682	gotsig = 0;
429		683
430	for (signum = signalmax; signum--; )	684	for (signum = signalmax; signum--; )
431	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)
432	{	727	{
433	signals [signum].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it now */
434		729	w->rpid = pid;
435	for (w = signals [signum].head; w; w = w->next)	730	w->rstatus = status;
436	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
437	}	732	}
438	}	733	}
439
440	static void
441	siginit (void)
442	{
443	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
444	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
445
446	/* rather than sort out wether we really need nb, set it */
447	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
448	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
449
450	ev_io_set (&sigev, sigpipe [0], EV_READ);
451	ev_io_start (&sigev);
452	}
453
454	/*****************************************************************************/
455
456	static struct ev_idle **idles;
457	static int idlemax, idlecnt;
458
459	static struct ev_prepare **prepares;
460	static int preparemax, preparecnt;
461
462	static struct ev_check **checks;
463	static int checkmax, checkcnt;
464
465	/*****************************************************************************/
466
467	static struct ev_child *childs [PID_HASHSIZE];
468	static struct ev_signal childev;
469		734
470	#ifndef WCONTINUED	735	#ifndef WCONTINUED
471	# define WCONTINUED 0	736	# define WCONTINUED 0
472	#endif	737	#endif
473		738
474	static void	739	static void
475	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
476	{	741	{
477	struct ev_child *w;
478	int pid, status;	742	int pid, status;
479		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
480	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
481	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	746	if (!WCONTINUED
482	if (w->pid == pid \|\| !w->pid)	747	\|\| errno != EINVAL
483	{	748	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
484	w->status = status;	749	return;
485	event ((W)w, EV_CHILD);	750
486	}	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 */
		753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		754
		755	child_reap (EV_A_ sw, pid, pid, status);
		756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
487	}	757	}
		758
		759	#endif
488		760
489	/*****************************************************************************/	761	/*****************************************************************************/
490		762
		763	#if EV_USE_PORT
		764	# include "ev_port.c"
		765	#endif
491	#if EV_USE_KQUEUE	766	#if EV_USE_KQUEUE
492	# include "ev_kqueue.c"	767	# include "ev_kqueue.c"
493	#endif	768	#endif
494	#if EV_USE_EPOLL	769	#if EV_USE_EPOLL
495	# include "ev_epoll.c"	770	# include "ev_epoll.c"
…		…
511	ev_version_minor (void)	786	ev_version_minor (void)
512	{	787	{
513	return EV_VERSION_MINOR;	788	return EV_VERSION_MINOR;
514	}	789	}
515		790
516	/* return true if we are running with elevated privileges and ignore env variables */	791	/* return true if we are running with elevated privileges and should ignore env variables */
517	static int	792	int inline_size
518	enable_secure ()	793	enable_secure (void)
519	{	794	{
		795	#ifdef _WIN32
		796	return 0;
		797	#else
520	return getuid () != geteuid ()	798	return getuid () != geteuid ()
521	\|\| getgid () != getegid ();	799	\|\| getgid () != getegid ();
		800	#endif
522	}	801	}
523		802
524	int ev_init (int methods)	803	unsigned int
		804	ev_supported_backends (void)
525	{	805	{
526	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)
527	{	853	{
528	#if EV_USE_MONOTONIC	854	#if EV_USE_MONOTONIC
529	{	855	{
530	struct timespec ts;	856	struct timespec ts;
531	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
532	have_monotonic = 1;	858	have_monotonic = 1;
533	}	859	}
534	#endif	860	#endif
535		861
536	ev_now = ev_time ();	862	ev_rt_now = ev_time ();
537	now = get_clock ();	863	mn_now = get_clock ();
538	now_floor = now;	864	now_floor = mn_now;
539	diff = ev_now - now;	865	rtmn_diff = ev_rt_now - mn_now;
540		866
541	if (pipe (sigpipe))	867	if (!(flags & EVFLAG_NOENV)
542	return 0;	868	&& !enable_secure ()
543		869	&& getenv ("LIBEV_FLAGS"))
544	if (methods == EVMETHOD_AUTO)
545	if (!enable_secure () && getenv ("LIBEV_METHODS"))
546	methods = atoi (getenv ("LIBEV_METHODS"));	870	flags = atoi (getenv ("LIBEV_FLAGS"));
547	else
548	methods = EVMETHOD_ANY;
549		871
550	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
551	#if EV_USE_KQUEUE	879	#if EV_USE_KQUEUE
552	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
553	#endif	881	#endif
554	#if EV_USE_EPOLL	882	#if EV_USE_EPOLL
555	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
556	#endif	884	#endif
557	#if EV_USE_POLL	885	#if EV_USE_POLL
558	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
559	#endif	887	#endif
560	#if EV_USE_SELECT	888	#if EV_USE_SELECT
561	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
562	#endif	890	#endif
563		891
564	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))
565	{	1019	{
566	ev_watcher_init (&sigev, sigcb);
567	siginit ();	1020	siginit (EV_A);
568		1021
		1022	#ifndef _WIN32
569	ev_signal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
570	ev_signal_start (&childev);	1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1027	#endif
571	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
572	}	1031	}
573		1032
574	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;
575	}	1066	}
576		1067
577	/*****************************************************************************/	1068	/*****************************************************************************/
578		1069
579	void	1070	int inline_size
580	ev_fork_prepare (void)	1071	any_pending (EV_P)
581	{	1072	{
582	/* nop */	1073	int pri;
583	}
584		1074
585	void	1075	for (pri = NUMPRI; pri--; )
586	ev_fork_parent (void)	1076	if (pendingcnt [pri])
587	{	1077	return 1;
588	/* nop */
589	}
590		1078
591	void	1079	return 0;
592	ev_fork_child (void)
593	{
594	#if EV_USE_EPOLL
595	if (ev_method == EVMETHOD_EPOLL)
596	epoll_postfork_child ();
597	#endif
598
599	ev_io_stop (&sigev);
600	close (sigpipe [0]);
601	close (sigpipe [1]);
602	pipe (sigpipe);
603	siginit ();
604	}	1080	}
605		1081
606	/*****************************************************************************/	1082	void inline_speed
607
608	static void
609	call_pending (void)	1083	call_pending (EV_P)
610	{	1084	{
611	int pri;	1085	int pri;
612		1086
613	for (pri = NUMPRI; pri--; )	1087	for (pri = NUMPRI; pri--; )
614	while (pendingcnt [pri])	1088	while (pendingcnt [pri])
615	{	1089	{
616	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
617		1091
618	if (p->w)	1092	if (expect_true (p->w))
619	{	1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
620	p->w->pending = 0;	1096	p->w->pending = 0;
621	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
622	}	1098	}
623	}	1099	}
624	}	1100	}
625		1101
626	static void	1102	void inline_size
627	timers_reify (void)	1103	timers_reify (EV_P)
628	{	1104	{
629	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
630	{	1106	{
631	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)));
632		1110
633	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
634	if (w->repeat)	1112	if (w->repeat)
635	{	1113	{
636	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
637	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
638	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
639	}	1121	}
640	else	1122	else
641	ev_timer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
642		1124
643	event ((W)w, EV_TIMEOUT);	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
644	}	1126	}
645	}	1127	}
646		1128
647	static void	1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
648	periodics_reify (void)	1131	periodics_reify (EV_P)
649	{	1132	{
650	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
651	{	1134	{
652	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)));
653		1138
654	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
655	if (w->interval)	1140	if (w->reschedule_cb)
656	{	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	{
657	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;
658	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));
659	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
660	}	1151	}
661	else	1152	else
662	ev_periodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
663		1154
664	event ((W)w, EV_PERIODIC);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
665	}	1156	}
666	}	1157	}
667		1158
668	static void	1159	static void noinline
669	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
670	{	1161	{
671	int i;	1162	int i;
672		1163
673	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
674	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
675	{	1166	{
676	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
677		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
678	if (w->interval)	1171	else if (w->interval)
679	{
680	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;
681
682	if (fabs (diff) >= 1e-4)
683	{
684	ev_periodic_stop (w);
685	ev_periodic_start (w);
686
687	i = 0; /* restart loop, inefficient, but time jumps should be rare */
688	}
689	}
690	}	1173	}
691	}
692		1174
693	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
694	time_update_monotonic (void)	1182	time_update_monotonic (EV_P)
695	{	1183	{
696	now = get_clock ();	1184	mn_now = get_clock ();
697		1185
698	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
699	{	1187	{
700	ev_now = now + diff;	1188	ev_rt_now = rtmn_diff + mn_now;
701	return 0;	1189	return 0;
702	}	1190	}
703	else	1191	else
704	{	1192	{
705	now_floor = now;	1193	now_floor = mn_now;
706	ev_now = ev_time ();	1194	ev_rt_now = ev_time ();
707	return 1;	1195	return 1;
708	}	1196	}
709	}	1197	}
710		1198
711	static void	1199	void inline_size
712	time_update (void)	1200	time_update (EV_P)
713	{	1201	{
714	int i;	1202	int i;
715		1203
716	#if EV_USE_MONOTONIC	1204	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	1205	if (expect_true (have_monotonic))
718	{	1206	{
719	if (time_update_monotonic ())	1207	if (time_update_monotonic (EV_A))
720	{	1208	{
721	ev_tstamp odiff = diff;	1209	ev_tstamp odiff = rtmn_diff;
722		1210
723	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; )
724	{	1220	{
725	diff = ev_now - now;	1221	rtmn_diff = ev_rt_now - mn_now;
726		1222
727	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
728	return; /* all is well */	1224	return; /* all is well */
729		1225
730	ev_now = ev_time ();	1226	ev_rt_now = ev_time ();
731	now = get_clock ();	1227	mn_now = get_clock ();
732	now_floor = now;	1228	now_floor = mn_now;
733	}	1229	}
734		1230
		1231	# if EV_PERIODIC_ENABLE
735	periodics_reschedule (diff - odiff);	1232	periodics_reschedule (EV_A);
		1233	# endif
736	/* 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) */
737	}	1236	}
738	}	1237	}
739	else	1238	else
740	#endif	1239	#endif
741	{	1240	{
742	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
743		1242
744	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))
745	{	1244	{
		1245	#if EV_PERIODIC_ENABLE
746	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
747		1248
748	/* 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 */
749	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
750	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
751	}	1252	}
752		1253
753	now = ev_now;	1254	mn_now = ev_rt_now;
754	}	1255	}
755	}	1256	}
756		1257
757	int ev_loop_done;	1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
758		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
759	void ev_loop (int flags)	1273	ev_loop (EV_P_ int flags)
760	{	1274	{
761	double block;
762	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1275	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
763		1278
764	do	1279	while (activecnt)
765	{	1280	{
766	/* queue check watchers (and execute them) */	1281	/* queue check watchers (and execute them) */
767	if (expect_false (preparecnt))	1282	if (expect_false (preparecnt))
768	{	1283	{
769	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1284	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
770	call_pending ();	1285	call_pending (EV_A);
771	}	1286	}
772		1287
		1288	/* we might have forked, so reify kernel state if necessary */
		1289	if (expect_false (postfork))
		1290	loop_fork (EV_A);
		1291
773	/* update fd-related kernel structures */	1292	/* update fd-related kernel structures */
774	fd_reify ();	1293	fd_reify (EV_A);
775		1294
776	/* calculate blocking time */	1295	/* calculate blocking time */
		1296	{
		1297	double block;
777		1298
778	/* we only need this for !monotonic clockor timers, but as we basically	1299	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
779	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 */
780	#if EV_USE_MONOTONIC	1304	#if EV_USE_MONOTONIC
781	if (expect_true (have_monotonic))	1305	if (expect_true (have_monotonic))
782	time_update_monotonic ();	1306	time_update_monotonic (EV_A);
783	else	1307	else
784	#endif	1308	#endif
785	{	1309	{
786	ev_now = ev_time ();	1310	ev_rt_now = ev_time ();
787	now = ev_now;	1311	mn_now = ev_rt_now;
788	}	1312	}
789		1313
790	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
791	block = 0.;
792	else
793	{
794	block = MAX_BLOCKTIME;	1314	block = MAX_BLOCKTIME;
795		1315
796	if (timercnt)	1316	if (timercnt)
797	{	1317	{
798	ev_tstamp to = timers [0]->at - now + method_fudge;	1318	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
799	if (block > to) block = to;	1319	if (block > to) block = to;
800	}	1320	}
801		1321
		1322	#if EV_PERIODIC_ENABLE
802	if (periodiccnt)	1323	if (periodiccnt)
803	{	1324	{
804	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1325	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
805	if (block > to) block = to;	1326	if (block > to) block = to;
806	}	1327	}
		1328	#endif
807		1329
808	if (block < 0.) block = 0.;	1330	if (expect_false (block < 0.)) block = 0.;
809	}	1331	}
810		1332
811	method_poll (block);	1333	backend_poll (EV_A_ block);
		1334	}
812		1335
813	/* update ev_now, do magic */	1336	/* update ev_rt_now, do magic */
814	time_update ();	1337	time_update (EV_A);
815		1338
816	/* queue pending timers and reschedule them */	1339	/* queue pending timers and reschedule them */
817	timers_reify (); /* relative timers called last */	1340	timers_reify (EV_A); /* relative timers called last */
		1341	#if EV_PERIODIC_ENABLE
818	periodics_reify (); /* absolute timers called first */	1342	periodics_reify (EV_A); /* absolute timers called first */
		1343	#endif
819		1344
820	/* queue idle watchers unless io or timers are pending */	1345	/* queue idle watchers unless other events are pending */
821	if (!pendingcnt)	1346	if (idlecnt && !any_pending (EV_A))
822	queue_events ((W *)idles, idlecnt, EV_IDLE);	1347	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
823		1348
824	/* queue check watchers, to be executed first */	1349	/* queue check watchers, to be executed first */
825	if (checkcnt)	1350	if (expect_false (checkcnt))
826	queue_events ((W *)checks, checkcnt, EV_CHECK);	1351	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
827		1352
828	call_pending ();	1353	call_pending (EV_A);
829	}
830	while (!ev_loop_done);
831		1354
832	if (ev_loop_done != 2)	1355	if (expect_false (loop_done))
		1356	break;
		1357	}
		1358
		1359	if (loop_done == EVUNLOOP_ONE)
		1360	loop_done = EVUNLOOP_CANCEL;
		1361	}
		1362
		1363	void
		1364	ev_unloop (EV_P_ int how)
		1365	{
833	ev_loop_done = 0;	1366	loop_done = how;
834	}	1367	}
835		1368
836	/*****************************************************************************/	1369	/*****************************************************************************/
837		1370
838	static void	1371	void inline_size
839	wlist_add (WL *head, WL elem)	1372	wlist_add (WL *head, WL elem)
840	{	1373	{
841	elem->next = *head;	1374	elem->next = *head;
842	*head = elem;	1375	*head = elem;
843	}	1376	}
844		1377
845	static void	1378	void inline_size
846	wlist_del (WL *head, WL elem)	1379	wlist_del (WL *head, WL elem)
847	{	1380	{
848	while (*head)	1381	while (*head)
849	{	1382	{
850	if (*head == elem)	1383	if (*head == elem)
…		…
855		1388
856	head = &(*head)->next;	1389	head = &(*head)->next;
857	}	1390	}
858	}	1391	}
859		1392
860	static void	1393	void inline_speed
861	ev_clear_pending (W w)	1394	ev_clear_pending (EV_P_ W w)
862	{	1395	{
863	if (w->pending)	1396	if (w->pending)
864	{	1397	{
865	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1398	pendings [ABSPRI (w)][w->pending - 1].w = 0;
866	w->pending = 0;	1399	w->pending = 0;
867	}	1400	}
868	}	1401	}
869		1402
870	static void	1403	void inline_speed
871	ev_start (W w, int active)	1404	ev_start (EV_P_ W w, int active)
872	{	1405	{
873	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1406	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
874	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1407	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
875		1408
876	w->active = active;	1409	w->active = active;
		1410	ev_ref (EV_A);
877	}	1411	}
878		1412
879	static void	1413	void inline_size
880	ev_stop (W w)	1414	ev_stop (EV_P_ W w)
881	{	1415	{
		1416	ev_unref (EV_A);
882	w->active = 0;	1417	w->active = 0;
883	}	1418	}
884		1419
885	/*****************************************************************************/	1420	/*****************************************************************************/
886		1421
887	void	1422	void
888	ev_io_start (struct ev_io *w)	1423	ev_io_start (EV_P_ ev_io *w)
889	{	1424	{
890	int fd = w->fd;	1425	int fd = w->fd;
891		1426
892	if (ev_is_active (w))	1427	if (expect_false (ev_is_active (w)))
893	return;	1428	return;
894		1429
895	assert (("ev_io_start called with negative fd", fd >= 0));	1430	assert (("ev_io_start called with negative fd", fd >= 0));
896		1431
897	ev_start ((W)w, 1);	1432	ev_start (EV_A_ (W)w, 1);
898	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1433	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
899	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1434	wlist_add ((WL *)&anfds[fd].head, (WL)w);
900		1435
901	fd_change (fd);	1436	fd_change (EV_A_ fd);
902	}	1437	}
903		1438
904	void	1439	void
905	ev_io_stop (struct ev_io *w)	1440	ev_io_stop (EV_P_ ev_io *w)
906	{	1441	{
907	ev_clear_pending ((W)w);	1442	ev_clear_pending (EV_A_ (W)w);
908	if (!ev_is_active (w))	1443	if (expect_false (!ev_is_active (w)))
909	return;	1444	return;
		1445
		1446	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
910		1447
911	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1448	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
912	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
913		1450
914	fd_change (w->fd);	1451	fd_change (EV_A_ w->fd);
915	}	1452	}
916		1453
917	void	1454	void
918	ev_timer_start (struct ev_timer *w)	1455	ev_timer_start (EV_P_ ev_timer *w)
919	{	1456	{
920	if (ev_is_active (w))	1457	if (expect_false (ev_is_active (w)))
921	return;	1458	return;
922		1459
923	w->at += now;	1460	((WT)w)->at += mn_now;
924		1461
925	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.));
926		1463
927	ev_start ((W)w, ++timercnt);	1464	ev_start (EV_A_ (W)w, ++timercnt);
928	array_needsize (timers, timermax, timercnt, );	1465	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
929	timers [timercnt - 1] = w;	1466	timers [timercnt - 1] = w;
930	upheap ((WT *)timers, timercnt - 1);	1467	upheap ((WT *)timers, timercnt - 1);
931	}
932		1468
		1469	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1470	}
		1471
933	void	1472	void
934	ev_timer_stop (struct ev_timer *w)	1473	ev_timer_stop (EV_P_ ev_timer *w)
935	{	1474	{
936	ev_clear_pending ((W)w);	1475	ev_clear_pending (EV_A_ (W)w);
937	if (!ev_is_active (w))	1476	if (expect_false (!ev_is_active (w)))
938	return;	1477	return;
939		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480
940	if (w->active < timercnt--)	1481	if (expect_true (((W)w)->active < timercnt--))
941	{	1482	{
942	timers [w->active - 1] = timers [timercnt];	1483	timers [((W)w)->active - 1] = timers [timercnt];
943	downheap ((WT *)timers, timercnt, w->active - 1);	1484	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
944	}	1485	}
945		1486
946	w->at = w->repeat;	1487	((WT)w)->at -= mn_now;
947		1488
948	ev_stop ((W)w);	1489	ev_stop (EV_A_ (W)w);
949	}	1490	}
950		1491
951	void	1492	void
952	ev_timer_again (struct ev_timer *w)	1493	ev_timer_again (EV_P_ ev_timer *w)
953	{	1494	{
954	if (ev_is_active (w))	1495	if (ev_is_active (w))
955	{	1496	{
956	if (w->repeat)	1497	if (w->repeat)
957	{	1498	{
958	w->at = now + w->repeat;	1499	((WT)w)->at = mn_now + w->repeat;
959	downheap ((WT *)timers, timercnt, w->active - 1);	1500	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
960	}	1501	}
961	else	1502	else
962	ev_timer_stop (w);	1503	ev_timer_stop (EV_A_ w);
963	}	1504	}
964	else if (w->repeat)	1505	else if (w->repeat)
		1506	{
		1507	w->at = w->repeat;
965	ev_timer_start (w);	1508	ev_timer_start (EV_A_ w);
		1509	}
966	}	1510	}
967		1511
		1512	#if EV_PERIODIC_ENABLE
968	void	1513	void
969	ev_periodic_start (struct ev_periodic *w)	1514	ev_periodic_start (EV_P_ ev_periodic *w)
970	{	1515	{
971	if (ev_is_active (w))	1516	if (expect_false (ev_is_active (w)))
972	return;	1517	return;
973		1518
		1519	if (w->reschedule_cb)
		1520	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1521	else if (w->interval)
		1522	{
974	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.));
975
976	/* 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 */
977	if (w->interval)
978	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1525	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1526	}
979		1527
980	ev_start ((W)w, ++periodiccnt);	1528	ev_start (EV_A_ (W)w, ++periodiccnt);
981	array_needsize (periodics, periodicmax, periodiccnt, );	1529	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
982	periodics [periodiccnt - 1] = w;	1530	periodics [periodiccnt - 1] = w;
983	upheap ((WT *)periodics, periodiccnt - 1);	1531	upheap ((WT *)periodics, periodiccnt - 1);
984	}
985		1532
		1533	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1534	}
		1535
986	void	1536	void
987	ev_periodic_stop (struct ev_periodic *w)	1537	ev_periodic_stop (EV_P_ ev_periodic *w)
988	{	1538	{
989	ev_clear_pending ((W)w);	1539	ev_clear_pending (EV_A_ (W)w);
990	if (!ev_is_active (w))	1540	if (expect_false (!ev_is_active (w)))
991	return;	1541	return;
992		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544
993	if (w->active < periodiccnt--)	1545	if (expect_true (((W)w)->active < periodiccnt--))
994	{	1546	{
995	periodics [w->active - 1] = periodics [periodiccnt];	1547	periodics [((W)w)->active - 1] = periodics [periodiccnt];
996	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1548	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
997	}	1549	}
998		1550
999	ev_stop ((W)w);	1551	ev_stop (EV_A_ (W)w);
1000	}	1552	}
1001		1553
1002	void	1554	void
		1555	ev_periodic_again (EV_P_ ev_periodic *w)
		1556	{
		1557	/* TODO: use adjustheap and recalculation */
		1558	ev_periodic_stop (EV_A_ w);
		1559	ev_periodic_start (EV_A_ w);
		1560	}
		1561	#endif
		1562
		1563	#ifndef SA_RESTART
		1564	# define SA_RESTART 0
		1565	#endif
		1566
		1567	void
1003	ev_signal_start (struct ev_signal *w)	1568	ev_signal_start (EV_P_ ev_signal *w)
1004	{	1569	{
		1570	#if EV_MULTIPLICITY
		1571	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1572	#endif
1005	if (ev_is_active (w))	1573	if (expect_false (ev_is_active (w)))
1006	return;	1574	return;
1007		1575
1008	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));
1009		1577
1010	ev_start ((W)w, 1);	1578	ev_start (EV_A_ (W)w, 1);
1011	array_needsize (signals, signalmax, w->signum, signals_init);	1579	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1012	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1580	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1013		1581
1014	if (!w->next)	1582	if (!((WL)w)->next)
1015	{	1583	{
		1584	#if _WIN32
		1585	signal (w->signum, sighandler);
		1586	#else
1016	struct sigaction sa;	1587	struct sigaction sa;
1017	sa.sa_handler = sighandler;	1588	sa.sa_handler = sighandler;
1018	sigfillset (&sa.sa_mask);	1589	sigfillset (&sa.sa_mask);
1019	sa.sa_flags = 0;	1590	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1020	sigaction (w->signum, &sa, 0);	1591	sigaction (w->signum, &sa, 0);
		1592	#endif
1021	}	1593	}
1022	}	1594	}
1023		1595
1024	void	1596	void
1025	ev_signal_stop (struct ev_signal *w)	1597	ev_signal_stop (EV_P_ ev_signal *w)
1026	{	1598	{
1027	ev_clear_pending ((W)w);	1599	ev_clear_pending (EV_A_ (W)w);
1028	if (!ev_is_active (w))	1600	if (expect_false (!ev_is_active (w)))
1029	return;	1601	return;
1030		1602
1031	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1603	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1032	ev_stop ((W)w);	1604	ev_stop (EV_A_ (W)w);
1033		1605
1034	if (!signals [w->signum - 1].head)	1606	if (!signals [w->signum - 1].head)
1035	signal (w->signum, SIG_DFL);	1607	signal (w->signum, SIG_DFL);
1036	}	1608	}
1037		1609
1038	void	1610	void
		1611	ev_child_start (EV_P_ ev_child *w)
		1612	{
		1613	#if EV_MULTIPLICITY
		1614	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1615	#endif
		1616	if (expect_false (ev_is_active (w)))
		1617	return;
		1618
		1619	ev_start (EV_A_ (W)w, 1);
		1620	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1621	}
		1622
		1623	void
		1624	ev_child_stop (EV_P_ ev_child *w)
		1625	{
		1626	ev_clear_pending (EV_A_ (W)w);
		1627	if (expect_false (!ev_is_active (w)))
		1628	return;
		1629
		1630	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1631	ev_stop (EV_A_ (W)w);
		1632	}
		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
1039	ev_idle_start (struct ev_idle *w)	1703	ev_idle_start (EV_P_ ev_idle *w)
1040	{	1704	{
1041	if (ev_is_active (w))	1705	if (expect_false (ev_is_active (w)))
1042	return;	1706	return;
1043		1707
1044	ev_start ((W)w, ++idlecnt);	1708	ev_start (EV_A_ (W)w, ++idlecnt);
1045	array_needsize (idles, idlemax, idlecnt, );	1709	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1046	idles [idlecnt - 1] = w;	1710	idles [idlecnt - 1] = w;
1047	}	1711	}
1048		1712
1049	void	1713	void
1050	ev_idle_stop (struct ev_idle *w)	1714	ev_idle_stop (EV_P_ ev_idle *w)
1051	{	1715	{
1052	ev_clear_pending ((W)w);	1716	ev_clear_pending (EV_A_ (W)w);
1053	if (ev_is_active (w))	1717	if (expect_false (!ev_is_active (w)))
1054	return;	1718	return;
1055		1719
		1720	{
		1721	int active = ((W)w)->active;
1056	idles [w->active - 1] = idles [--idlecnt];	1722	idles [active - 1] = idles [--idlecnt];
		1723	((W)idles [active - 1])->active = active;
		1724	}
		1725
1057	ev_stop ((W)w);	1726	ev_stop (EV_A_ (W)w);
1058	}	1727	}
1059		1728
1060	void	1729	void
1061	ev_prepare_start (struct ev_prepare *w)	1730	ev_prepare_start (EV_P_ ev_prepare *w)
1062	{	1731	{
1063	if (ev_is_active (w))	1732	if (expect_false (ev_is_active (w)))
1064	return;	1733	return;
1065		1734
1066	ev_start ((W)w, ++preparecnt);	1735	ev_start (EV_A_ (W)w, ++preparecnt);
1067	array_needsize (prepares, preparemax, preparecnt, );	1736	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1068	prepares [preparecnt - 1] = w;	1737	prepares [preparecnt - 1] = w;
1069	}	1738	}
1070		1739
1071	void	1740	void
1072	ev_prepare_stop (struct ev_prepare *w)	1741	ev_prepare_stop (EV_P_ ev_prepare *w)
1073	{	1742	{
1074	ev_clear_pending ((W)w);	1743	ev_clear_pending (EV_A_ (W)w);
1075	if (ev_is_active (w))	1744	if (expect_false (!ev_is_active (w)))
1076	return;	1745	return;
1077		1746
		1747	{
		1748	int active = ((W)w)->active;
1078	prepares [w->active - 1] = prepares [--preparecnt];	1749	prepares [active - 1] = prepares [--preparecnt];
		1750	((W)prepares [active - 1])->active = active;
		1751	}
		1752
1079	ev_stop ((W)w);	1753	ev_stop (EV_A_ (W)w);
1080	}	1754	}
1081		1755
1082	void	1756	void
1083	ev_check_start (struct ev_check *w)	1757	ev_check_start (EV_P_ ev_check *w)
1084	{	1758	{
1085	if (ev_is_active (w))	1759	if (expect_false (ev_is_active (w)))
1086	return;	1760	return;
1087		1761
1088	ev_start ((W)w, ++checkcnt);	1762	ev_start (EV_A_ (W)w, ++checkcnt);
1089	array_needsize (checks, checkmax, checkcnt, );	1763	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1090	checks [checkcnt - 1] = w;	1764	checks [checkcnt - 1] = w;
1091	}	1765	}
1092		1766
1093	void	1767	void
1094	ev_check_stop (struct ev_check *w)	1768	ev_check_stop (EV_P_ ev_check *w)
1095	{	1769	{
1096	ev_clear_pending ((W)w);	1770	ev_clear_pending (EV_A_ (W)w);
1097	if (ev_is_active (w))	1771	if (expect_false (!ev_is_active (w)))
1098	return;	1772	return;
1099		1773
		1774	{
		1775	int active = ((W)w)->active;
1100	checks [w->active - 1] = checks [--checkcnt];	1776	checks [active - 1] = checks [--checkcnt];
		1777	((W)checks [active - 1])->active = active;
		1778	}
		1779
1101	ev_stop ((W)w);	1780	ev_stop (EV_A_ (W)w);
1102	}	1781	}
1103		1782
1104	void	1783	#if EV_EMBED_ENABLE
1105	ev_child_start (struct ev_child *w)	1784	void noinline
		1785	ev_embed_sweep (EV_P_ ev_embed *w)
1106	{	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
1107	if (ev_is_active (w))	1795	if (ev_cb (w))
1108	return;	1796	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1797	else
		1798	ev_embed_sweep (loop, w);
		1799	}
1109		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
1110	ev_start ((W)w, 1);	1816	ev_start (EV_A_ (W)w, 1);
1111	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1112	}	1817	}
1113		1818
1114	void	1819	void
1115	ev_child_stop (struct ev_child *w)	1820	ev_embed_stop (EV_P_ ev_embed *w)
1116	{	1821	{
1117	ev_clear_pending ((W)w);	1822	ev_clear_pending (EV_A_ (W)w);
1118	if (ev_is_active (w))	1823	if (expect_false (!ev_is_active (w)))
1119	return;	1824	return;
1120		1825
1121	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1826	ev_io_stop (EV_A_ &w->io);
		1827
1122	ev_stop ((W)w);	1828	ev_stop (EV_A_ (W)w);
1123	}	1829	}
		1830	#endif
1124		1831
1125	/*****************************************************************************/	1832	/*****************************************************************************/
1126		1833
1127	struct ev_once	1834	struct ev_once
1128	{	1835	{
1129	struct ev_io io;	1836	ev_io io;
1130	struct ev_timer to;	1837	ev_timer to;
1131	void (cb)(int revents, void arg);	1838	void (cb)(int revents, void arg);
1132	void *arg;	1839	void *arg;
1133	};	1840	};
1134		1841
1135	static void	1842	static void
1136	once_cb (struct ev_once *once, int revents)	1843	once_cb (EV_P_ struct ev_once *once, int revents)
1137	{	1844	{
1138	void (cb)(int revents, void arg) = once->cb;	1845	void (cb)(int revents, void arg) = once->cb;
1139	void *arg = once->arg;	1846	void *arg = once->arg;
1140		1847
1141	ev_io_stop (&once->io);	1848	ev_io_stop (EV_A_ &once->io);
1142	ev_timer_stop (&once->to);	1849	ev_timer_stop (EV_A_ &once->to);
1143	free (once);	1850	ev_free (once);
1144		1851
1145	cb (revents, arg);	1852	cb (revents, arg);
1146	}	1853	}
1147		1854
1148	static void	1855	static void
1149	once_cb_io (struct ev_io *w, int revents)	1856	once_cb_io (EV_P_ ev_io *w, int revents)
1150	{	1857	{
1151	once_cb ((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);
1152	}	1859	}
1153		1860
1154	static void	1861	static void
1155	once_cb_to (struct ev_timer *w, int revents)	1862	once_cb_to (EV_P_ ev_timer *w, int revents)
1156	{	1863	{
1157	once_cb ((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);
1158	}	1865	}
1159		1866
1160	void	1867	void
1161	ev_once (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)
1162	{	1869	{
1163	struct ev_once *once = malloc (sizeof (struct ev_once));	1870	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1164		1871
1165	if (!once)	1872	if (expect_false (!once))
		1873	{
1166	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1874	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1167	else	1875	return;
1168	{	1876	}
		1877
1169	once->cb = cb;	1878	once->cb = cb;
1170	once->arg = arg;	1879	once->arg = arg;
1171		1880
1172	ev_watcher_init (&once->io, once_cb_io);	1881	ev_init (&once->io, once_cb_io);
1173	if (fd >= 0)	1882	if (fd >= 0)
1174	{	1883	{
1175	ev_io_set (&once->io, fd, events);	1884	ev_io_set (&once->io, fd, events);
1176	ev_io_start (&once->io);	1885	ev_io_start (EV_A_ &once->io);
1177	}	1886	}
1178		1887
1179	ev_watcher_init (&once->to, once_cb_to);	1888	ev_init (&once->to, once_cb_to);
1180	if (timeout >= 0.)	1889	if (timeout >= 0.)
1181	{	1890	{
1182	ev_timer_set (&once->to, timeout, 0.);	1891	ev_timer_set (&once->to, timeout, 0.);
1183	ev_timer_start (&once->to);	1892	ev_timer_start (EV_A_ &once->to);
1184	}
1185	}
1186	}
1187
1188	/*****************************************************************************/
1189
1190	#if 0
1191
1192	struct ev_io wio;
1193
1194	static void
1195	sin_cb (struct ev_io *w, int revents)
1196	{
1197	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1198	}
1199
1200	static void
1201	ocb (struct ev_timer *w, int revents)
1202	{
1203	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1204	ev_timer_stop (w);
1205	ev_timer_start (w);
1206	}
1207
1208	static void
1209	scb (struct ev_signal *w, int revents)
1210	{
1211	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1212	ev_io_stop (&wio);
1213	ev_io_start (&wio);
1214	}
1215
1216	static void
1217	gcb (struct ev_signal *w, int revents)
1218	{
1219	fprintf (stderr, "generic %x\n", revents);
1220
1221	}
1222
1223	int main (void)
1224	{
1225	ev_init (0);
1226
1227	ev_io_init (&wio, sin_cb, 0, EV_READ);
1228	ev_io_start (&wio);
1229
1230	struct ev_timer t[10000];
1231
1232	#if 0
1233	int i;
1234	for (i = 0; i < 10000; ++i)
1235	{	1893	}
1236	struct ev_timer *w = t + i;
1237	ev_watcher_init (w, ocb, i);
1238	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1239	ev_timer_start (w);
1240	if (drand48 () < 0.5)
1241	ev_timer_stop (w);
1242	}
1243	#endif
1244
1245	struct ev_timer t1;
1246	ev_timer_init (&t1, ocb, 5, 10);
1247	ev_timer_start (&t1);
1248
1249	struct ev_signal sig;
1250	ev_signal_init (&sig, scb, SIGQUIT);
1251	ev_signal_start (&sig);
1252
1253	struct ev_check cw;
1254	ev_check_init (&cw, gcb);
1255	ev_check_start (&cw);
1256
1257	struct ev_idle iw;
1258	ev_idle_init (&iw, gcb);
1259	ev_idle_start (&iw);
1260
1261	ev_loop (0);
1262
1263	return 0;
1264	}	1894	}
1265		1895
		1896	#ifdef __cplusplus
		1897	}
1266	#endif	1898	#endif
1267		1899
1268
1269
1270

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.44 by root, Fri Nov 2 20:59:14 2007 UTC vs. Revision 1.146 by root, Tue Nov 27 09:17:51 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.44 by root, Fri Nov 2 20:59:14 2007 UTC vs.
Revision 1.146 by root, Tue Nov 27 09:17:51 2007 UTC