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

Comparing libev/ev.c (file contents):
Revision 1.42 by root, Fri Nov 2 20:05:05 2007 UTC vs.
Revision 1.148 by root, Tue Nov 27 11:11:13 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
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
69	#ifndef EV_USE_REALTIME	157	#ifndef EV_USE_PORT
70	# define EV_USE_REALTIME 1	158	# define EV_USE_PORT 0
71	#endif	159	#endif
72		160
73	/**/	161	/**/
74		162
75	#ifndef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
…		…
80	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
81	# undef EV_USE_REALTIME	169	# undef EV_USE_REALTIME
82	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
83	#endif	171	#endif
84		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
85	/**/	177	/**/
86		178
87	#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) */
88	#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) */
89	#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 */
90	/#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 */
91		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
92	#include "ev.h"	187	# include "ev.h"
		188	#endif
93		189
94	#if __GNUC__ >= 3	190	#if __GNUC__ >= 3
95	# 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
96	# 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
97	#else	200	#else
98	# define expect(expr,value) (expr)	201	# define expect(expr,value) (expr)
		202	# define inline_speed static
99	# define inline static	203	# define inline_size static
		204	# define noinline
100	#endif	205	#endif
101		206
102	#define expect_false(expr) expect ((expr) != 0, 0)	207	#define expect_false(expr) expect ((expr) != 0, 0)
103	#define expect_true(expr) expect ((expr) != 0, 1)	208	#define expect_true(expr) expect ((expr) != 0, 1)
104		209
105	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
106	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
107		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
108	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
109	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
110	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
111		219
112	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
113	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
114	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
115		315
116	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
117		317
118	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
119	static void (*method_modify)(int fd, int oev, int nev);
120	static void (*method_poll)(ev_tstamp timeout);
121		319
122	/*****************************************************************************/	320	/*****************************************************************************/
123		321
124	ev_tstamp	322	ev_tstamp
125	ev_time (void)	323	ev_time (void)
…		…
133	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
134	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
135	#endif	333	#endif
136	}	334	}
137		335
138	static ev_tstamp	336	ev_tstamp inline_size
139	get_clock (void)	337	get_clock (void)
140	{	338	{
141	#if EV_USE_MONOTONIC	339	#if EV_USE_MONOTONIC
142	if (expect_true (have_monotonic))	340	if (expect_true (have_monotonic))
143	{	341	{
…		…
148	#endif	346	#endif
149		347
150	return ev_time ();	348	return ev_time ();
151	}	349	}
152		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
153	#define array_roundsize(base,n) ((n) \| 4 & ~3)	359	#define array_roundsize(type,n) (((n) \| 4) & ~3)
154		360
155	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
156	if (expect_false ((cnt) > cur)) \	362	if (expect_false ((cnt) > cur)) \
157	{ \	363	{ \
158	int newcnt = cur; \	364	int newcnt = cur; \
159	do \	365	do \
160	{ \	366	{ \
161	newcnt = array_roundsize (base, newcnt << 1); \	367	newcnt = array_roundsize (type, newcnt << 1); \
162	} \	368	} \
163	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
164	\	370	\
165	base = realloc (base, sizeof (base) (newcnt)); \	371	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
166	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
167	cur = newcnt; \	373	cur = newcnt; \
168	}	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;
169		386
170	/*****************************************************************************/	387	/*****************************************************************************/
171		388
172	typedef struct	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
173	{	391	{
174	struct ev_io *head;	392	W w_ = (W)w;
175	unsigned char events;
176	unsigned char reify;
177	} ANFD;
178		393
179	static ANFD *anfds;	394	if (expect_false (w_->pending))
180	static int anfdmax;	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		397	return;
		398	}
181		399
182	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
183	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
184	{	419	{
185	while (count--)	420	while (count--)
186	{	421	{
187	base->head = 0;	422	base->head = 0;
…		…
190		425
191	++base;	426	++base;
192	}	427	}
193	}	428	}
194		429
195	typedef struct	430	void inline_speed
196	{
197	W w;
198	int events;
199	} ANPENDING;
200
201	static ANPENDING *pendings [NUMPRI];
202	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
203
204	static void
205	event (W w, int events)
206	{
207	if (w->pending)
208	{
209	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
210	return;
211	}
212
213	w->pending = ++pendingcnt [ABSPRI (w)];
214	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
215	pendings [ABSPRI (w)][w->pending - 1].w = w;
216	pendings [ABSPRI (w)][w->pending - 1].events = events;
217	}
218
219	static void
220	queue_events (W *events, int eventcnt, int type)
221	{
222	int i;
223
224	for (i = 0; i < eventcnt; ++i)
225	event (events [i], type);
226	}
227
228	static void
229	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
230	{	432	{
231	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
232	struct ev_io *w;	434	ev_io *w;
233		435
234	for (w = anfd->head; w; w = w->next)	436	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
235	{	437	{
236	int ev = w->events & events;	438	int ev = w->events & revents;
237		439
238	if (ev)	440	if (ev)
239	event ((W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
240	}	442	}
241	}	443	}
242		444
243	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
244		450
245	static int *fdchanges;	451	void inline_size
246	static int fdchangemax, fdchangecnt;	452	fd_reify (EV_P)
247
248	static void
249	fd_reify (void)
250	{	453	{
251	int i;	454	int i;
252		455
253	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
254	{	457	{
255	int fd = fdchanges [i];	458	int fd = fdchanges [i];
256	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
257	struct ev_io *w;	460	ev_io *w;
258		461
259	int events = 0;	462	int events = 0;
260		463
261	for (w = anfd->head; w; w = w->next)	464	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
262	events \|= w->events;	465	events \|= w->events;
263		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
264	anfd->reify = 0;	476	anfd->reify = 0;
265		477
266	if (anfd->events != events)
267	{
268	method_modify (fd, anfd->events, events);	478	backend_modify (EV_A_ fd, anfd->events, events);
269	anfd->events = events;	479	anfd->events = events;
270	}
271	}	480	}
272		481
273	fdchangecnt = 0;	482	fdchangecnt = 0;
274	}	483	}
275		484
276	static void	485	void inline_size
277	fd_change (int fd)	486	fd_change (EV_P_ int fd)
278	{	487	{
279	if (anfds [fd].reify \|\| fdchangecnt < 0)	488	if (expect_false (anfds [fd].reify))
280	return;	489	return;
281		490
282	anfds [fd].reify = 1;	491	anfds [fd].reify = 1;
283		492
284	++fdchangecnt;	493	++fdchangecnt;
285	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
286	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
287	}	496	}
288		497
289	static void	498	void inline_speed
290	fd_kill (int fd)	499	fd_kill (EV_P_ int fd)
291	{	500	{
292	struct ev_io *w;	501	ev_io *w;
293		502
294	printf ("killing fd %d\n", fd);//D
295	while ((w = anfds [fd].head))	503	while ((w = (ev_io *)anfds [fd].head))
296	{	504	{
297	ev_io_stop (w);	505	ev_io_stop (EV_A_ w);
298	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);	506	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
299	}	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
300	}	518	}
301		519
302	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
303	static void	521	static void noinline
304	fd_ebadf (void)	522	fd_ebadf (EV_P)
305	{	523	{
306	int fd;	524	int fd;
307		525
308	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
309	if (anfds [fd].events)	527	if (anfds [fd].events)
310	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
311	fd_kill (fd);	529	fd_kill (EV_A_ fd);
312	}	530	}
313		531
314	/* 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 */
315	static void	533	static void noinline
316	fd_enomem (void)	534	fd_enomem (EV_P)
317	{	535	{
318	int fd = anfdmax;	536	int fd;
319		537
320	while (fd--)	538	for (fd = anfdmax; fd--; )
321	if (anfds [fd].events)	539	if (anfds [fd].events)
322	{	540	{
323	close (fd);
324	fd_kill (fd);	541	fd_kill (EV_A_ fd);
325	return;	542	return;
326	}	543	}
327	}	544	}
328		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
329	/*****************************************************************************/	561	/*****************************************************************************/
330		562
331	static struct ev_timer **timers;	563	void inline_speed
332	static int timermax, timercnt;
333
334	static struct ev_periodic **periodics;
335	static int periodicmax, periodiccnt;
336
337	static void
338	upheap (WT *timers, int k)	564	upheap (WT *heap, int k)
339	{	565	{
340	WT w = timers [k];	566	WT w = heap [k];
341		567
342	while (k && timers [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
343	{	569	{
344	timers [k] = timers [k >> 1];	570	heap [k] = heap [k >> 1];
345	timers [k]->active = k + 1;	571	((W)heap [k])->active = k + 1;
346	k >>= 1;	572	k >>= 1;
347	}	573	}
348		574
349	timers [k] = w;	575	heap [k] = w;
350	timers [k]->active = k + 1;	576	((W)heap [k])->active = k + 1;
351		577
352	}	578	}
353		579
354	static void	580	void inline_speed
355	downheap (WT *timers, int N, int k)	581	downheap (WT *heap, int N, int k)
356	{	582	{
357	WT w = timers [k];	583	WT w = heap [k];
358		584
359	while (k < (N >> 1))	585	while (k < (N >> 1))
360	{	586	{
361	int j = k << 1;	587	int j = k << 1;
362		588
363	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
364	++j;	590	++j;
365		591
366	if (w->at <= timers [j]->at)	592	if (w->at <= heap [j]->at)
367	break;	593	break;
368		594
369	timers [k] = timers [j];	595	heap [k] = heap [j];
370	timers [k]->active = k + 1;	596	((W)heap [k])->active = k + 1;
371	k = j;	597	k = j;
372	}	598	}
373		599
374	timers [k] = w;	600	heap [k] = w;
375	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);
376	}	609	}
377		610
378	/*****************************************************************************/	611	/*****************************************************************************/
379		612
380	typedef struct	613	typedef struct
381	{	614	{
382	struct ev_signal *head;	615	WL head;
383	sig_atomic_t volatile gotsig;	616	sig_atomic_t volatile gotsig;
384	} ANSIG;	617	} ANSIG;
385		618
386	static ANSIG *signals;	619	static ANSIG *signals;
387	static int signalmax;	620	static int signalmax;
388		621
389	static int sigpipe [2];	622	static int sigpipe [2];
390	static sig_atomic_t volatile gotsig;	623	static sig_atomic_t volatile gotsig;
391	static struct ev_io sigev;	624	static ev_io sigev;
392		625
393	static void	626	void inline_size
394	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
395	{	628	{
396	while (count--)	629	while (count--)
397	{	630	{
398	base->head = 0;	631	base->head = 0;
…		…
403	}	636	}
404		637
405	static void	638	static void
406	sighandler (int signum)	639	sighandler (int signum)
407	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
408	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
409		646
410	if (!gotsig)	647	if (!gotsig)
411	{	648	{
		649	int old_errno = errno;
412	gotsig = 1;	650	gotsig = 1;
413	write (sigpipe [1], &signum, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
414	}	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);
415	}	674	}
416		675
417	static void	676	static void
418	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
419	{	678	{
420	struct ev_signal *w;
421	int signum;	679	int signum;
422		680
423	read (sigpipe [0], &revents, 1);	681	read (sigpipe [0], &revents, 1);
424	gotsig = 0;	682	gotsig = 0;
425		683
426	for (signum = signalmax; signum--; )	684	for (signum = signalmax; signum--; )
427	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)
428	{	727	{
429	signals [signum].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it now */
430		729	w->rpid = pid;
431	for (w = signals [signum].head; w; w = w->next)	730	w->rstatus = status;
432	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
433	}	732	}
434	}	733	}
435
436	static void
437	siginit (void)
438	{
439	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
440	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
441
442	/* rather than sort out wether we really need nb, set it */
443	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
444	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
445
446	ev_io_set (&sigev, sigpipe [0], EV_READ);
447	ev_io_start (&sigev);
448	}
449
450	/*****************************************************************************/
451
452	static struct ev_idle **idles;
453	static int idlemax, idlecnt;
454
455	static struct ev_prepare **prepares;
456	static int preparemax, preparecnt;
457
458	static struct ev_check **checks;
459	static int checkmax, checkcnt;
460
461	/*****************************************************************************/
462
463	static struct ev_child *childs [PID_HASHSIZE];
464	static struct ev_signal childev;
465		734
466	#ifndef WCONTINUED	735	#ifndef WCONTINUED
467	# define WCONTINUED 0	736	# define WCONTINUED 0
468	#endif	737	#endif
469		738
470	static void	739	static void
471	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
472	{	741	{
473	struct ev_child *w;
474	int pid, status;	742	int pid, status;
475		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
476	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
477	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	746	if (!WCONTINUED
478	if (w->pid == pid \|\| !w->pid)	747	\|\| errno != EINVAL
479	{	748	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
480	w->status = status;	749	return;
481	event ((W)w, EV_CHILD);	750
482	}	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 */
483	}	757	}
		758
		759	#endif
484		760
485	/*****************************************************************************/	761	/*****************************************************************************/
486		762
		763	#if EV_USE_PORT
		764	# include "ev_port.c"
		765	#endif
		766	#if EV_USE_KQUEUE
		767	# include "ev_kqueue.c"
		768	#endif
487	#if EV_USE_EPOLL	769	#if EV_USE_EPOLL
488	# include "ev_epoll.c"	770	# include "ev_epoll.c"
489	#endif	771	#endif
490	#if EV_USE_POLL	772	#if EV_USE_POLL
491	# include "ev_poll.c"	773	# include "ev_poll.c"
…		…
504	ev_version_minor (void)	786	ev_version_minor (void)
505	{	787	{
506	return EV_VERSION_MINOR;	788	return EV_VERSION_MINOR;
507	}	789	}
508		790
509	/* 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 */
510	static int	792	int inline_size
511	enable_secure ()	793	enable_secure (void)
512	{	794	{
		795	#ifdef _WIN32
		796	return 0;
		797	#else
513	return getuid () != geteuid ()	798	return getuid () != geteuid ()
514	\|\| getgid () != getegid ();	799	\|\| getgid () != getegid ();
		800	#endif
515	}	801	}
516		802
517	int ev_init (int methods)	803	unsigned int
		804	ev_supported_backends (void)
518	{	805	{
519	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)
520	{	853	{
521	#if EV_USE_MONOTONIC	854	#if EV_USE_MONOTONIC
522	{	855	{
523	struct timespec ts;	856	struct timespec ts;
524	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
525	have_monotonic = 1;	858	have_monotonic = 1;
526	}	859	}
527	#endif	860	#endif
528		861
529	ev_now = ev_time ();	862	ev_rt_now = ev_time ();
530	now = get_clock ();	863	mn_now = get_clock ();
531	now_floor = now;	864	now_floor = mn_now;
532	diff = ev_now - now;	865	rtmn_diff = ev_rt_now - mn_now;
533		866
534	if (pipe (sigpipe))	867	if (!(flags & EVFLAG_NOENV)
535	return 0;	868	&& !enable_secure ()
536		869	&& getenv ("LIBEV_FLAGS"))
537	if (methods == EVMETHOD_AUTO)
538	if (!enable_secure () && getenv ("LIBEV_METHODS"))
539	methods = atoi (getenv ("LIBEV_METHODS"));	870	flags = atoi (getenv ("LIBEV_FLAGS"));
540	else
541	methods = EVMETHOD_ANY;
542		871
543	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
		879	#if EV_USE_KQUEUE
		880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		881	#endif
544	#if EV_USE_EPOLL	882	#if EV_USE_EPOLL
545	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
546	#endif	884	#endif
547	#if EV_USE_POLL	885	#if EV_USE_POLL
548	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
549	#endif	887	#endif
550	#if EV_USE_SELECT	888	#if EV_USE_SELECT
551	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
552	#endif	890	#endif
553		891
554	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))
555	{	1019	{
556	ev_watcher_init (&sigev, sigcb);
557	siginit ();	1020	siginit (EV_A);
558		1021
		1022	#ifndef _WIN32
559	ev_signal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
560	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
561	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
562	}	1031	}
563		1032
564	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;
565	}	1066	}
566		1067
567	/*****************************************************************************/	1068	/*****************************************************************************/
568		1069
569	void	1070	int inline_size
570	ev_fork_prepare (void)	1071	any_pending (EV_P)
571	{	1072	{
572	/* nop */	1073	int pri;
573	}
574		1074
575	void	1075	for (pri = NUMPRI; pri--; )
576	ev_fork_parent (void)	1076	if (pendingcnt [pri])
577	{	1077	return 1;
578	/* nop */
579	}
580		1078
581	void	1079	return 0;
582	ev_fork_child (void)
583	{
584	#if EV_USE_EPOLL
585	if (ev_method == EVMETHOD_EPOLL)
586	epoll_postfork_child ();
587	#endif
588
589	ev_io_stop (&sigev);
590	close (sigpipe [0]);
591	close (sigpipe [1]);
592	pipe (sigpipe);
593	siginit ();
594	}	1080	}
595		1081
596	/*****************************************************************************/	1082	void inline_speed
597
598	static void
599	call_pending (void)	1083	call_pending (EV_P)
600	{	1084	{
601	int pri;	1085	int pri;
602		1086
603	for (pri = NUMPRI; pri--; )	1087	for (pri = NUMPRI; pri--; )
604	while (pendingcnt [pri])	1088	while (pendingcnt [pri])
605	{	1089	{
606	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
607		1091
608	if (p->w)	1092	if (expect_true (p->w))
609	{	1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
610	p->w->pending = 0;	1096	p->w->pending = 0;
611	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
612	}	1098	}
613	}	1099	}
614	}	1100	}
615		1101
616	static void	1102	void inline_size
617	timers_reify (void)	1103	timers_reify (EV_P)
618	{	1104	{
619	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
620	{	1106	{
621	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)));
622		1110
623	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
624	if (w->repeat)	1112	if (w->repeat)
625	{	1113	{
626	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
627	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
628	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
629	}	1121	}
630	else	1122	else
631	ev_timer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
632		1124
633	event ((W)w, EV_TIMEOUT);	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
634	}	1126	}
635	}	1127	}
636		1128
637	static void	1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
638	periodics_reify (void)	1131	periodics_reify (EV_P)
639	{	1132	{
640	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
641	{	1134	{
642	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)));
643		1138
644	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
645	if (w->interval)	1140	if (w->reschedule_cb)
646	{	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	{
647	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;
648	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));
649	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
650	}	1151	}
651	else	1152	else
652	ev_periodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
653		1154
654	event ((W)w, EV_PERIODIC);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
655	}	1156	}
656	}	1157	}
657		1158
658	static void	1159	static void noinline
659	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
660	{	1161	{
661	int i;	1162	int i;
662		1163
663	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
664	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
665	{	1166	{
666	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
667		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
668	if (w->interval)	1171	else if (w->interval)
669	{
670	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;
671
672	if (fabs (diff) >= 1e-4)
673	{
674	ev_periodic_stop (w);
675	ev_periodic_start (w);
676
677	i = 0; /* restart loop, inefficient, but time jumps should be rare */
678	}
679	}
680	}	1173	}
681	}
682		1174
683	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
684	time_update_monotonic (void)	1182	time_update_monotonic (EV_P)
685	{	1183	{
686	now = get_clock ();	1184	mn_now = get_clock ();
687		1185
688	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
689	{	1187	{
690	ev_now = now + diff;	1188	ev_rt_now = rtmn_diff + mn_now;
691	return 0;	1189	return 0;
692	}	1190	}
693	else	1191	else
694	{	1192	{
695	now_floor = now;	1193	now_floor = mn_now;
696	ev_now = ev_time ();	1194	ev_rt_now = ev_time ();
697	return 1;	1195	return 1;
698	}	1196	}
699	}	1197	}
700		1198
701	static void	1199	void inline_size
702	time_update (void)	1200	time_update (EV_P)
703	{	1201	{
704	int i;	1202	int i;
705		1203
706	#if EV_USE_MONOTONIC	1204	#if EV_USE_MONOTONIC
707	if (expect_true (have_monotonic))	1205	if (expect_true (have_monotonic))
708	{	1206	{
709	if (time_update_monotonic ())	1207	if (time_update_monotonic (EV_A))
710	{	1208	{
711	ev_tstamp odiff = diff;	1209	ev_tstamp odiff = rtmn_diff;
712		1210
713	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; )
714	{	1220	{
715	diff = ev_now - now;	1221	rtmn_diff = ev_rt_now - mn_now;
716		1222
717	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
718	return; /* all is well */	1224	return; /* all is well */
719		1225
720	ev_now = ev_time ();	1226	ev_rt_now = ev_time ();
721	now = get_clock ();	1227	mn_now = get_clock ();
722	now_floor = now;	1228	now_floor = mn_now;
723	}	1229	}
724		1230
		1231	# if EV_PERIODIC_ENABLE
725	periodics_reschedule (diff - odiff);	1232	periodics_reschedule (EV_A);
		1233	# endif
726	/* 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) */
727	}	1236	}
728	}	1237	}
729	else	1238	else
730	#endif	1239	#endif
731	{	1240	{
732	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
733		1242
734	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))
735	{	1244	{
		1245	#if EV_PERIODIC_ENABLE
736	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
737		1248
738	/* 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 */
739	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
740	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
741	}	1252	}
742		1253
743	now = ev_now;	1254	mn_now = ev_rt_now;
744	}	1255	}
745	}	1256	}
746		1257
747	int ev_loop_done;	1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
748		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
749	void ev_loop (int flags)	1273	ev_loop (EV_P_ int flags)
750	{	1274	{
751	double block;
752	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1275	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
753		1278
754	do	1279	while (activecnt)
755	{	1280	{
		1281	/* we might have forked, so reify kernel state if necessary */
		1282	#if EV_FORK_ENABLE
		1283	if (expect_false (postfork))
		1284	if (forkcnt)
		1285	{
		1286	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1287	call_pending (EV_A);
		1288	}
		1289	#endif
		1290
756	/* queue check watchers (and execute them) */	1291	/* queue check watchers (and execute them) */
757	if (expect_false (preparecnt))	1292	if (expect_false (preparecnt))
758	{	1293	{
759	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1294	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
760	call_pending ();	1295	call_pending (EV_A);
761	}	1296	}
762		1297
		1298	/* we might have forked, so reify kernel state if necessary */
		1299	if (expect_false (postfork))
		1300	loop_fork (EV_A);
		1301
763	/* update fd-related kernel structures */	1302	/* update fd-related kernel structures */
764	fd_reify ();	1303	fd_reify (EV_A);
765		1304
766	/* calculate blocking time */	1305	/* calculate blocking time */
		1306	{
		1307	double block;
767		1308
768	/* we only need this for !monotonic clockor timers, but as we basically	1309	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
769	always have timers, we just calculate it always */	1310	block = 0.; /* do not block at all */
		1311	else
		1312	{
		1313	/* update time to cancel out callback processing overhead */
770	#if EV_USE_MONOTONIC	1314	#if EV_USE_MONOTONIC
771	if (expect_true (have_monotonic))	1315	if (expect_true (have_monotonic))
772	time_update_monotonic ();	1316	time_update_monotonic (EV_A);
773	else	1317	else
774	#endif	1318	#endif
775	{	1319	{
776	ev_now = ev_time ();	1320	ev_rt_now = ev_time ();
777	now = ev_now;	1321	mn_now = ev_rt_now;
778	}	1322	}
779		1323
780	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
781	block = 0.;
782	else
783	{
784	block = MAX_BLOCKTIME;	1324	block = MAX_BLOCKTIME;
785		1325
786	if (timercnt)	1326	if (timercnt)
787	{	1327	{
788	ev_tstamp to = timers [0]->at - now + method_fudge;	1328	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
789	if (block > to) block = to;	1329	if (block > to) block = to;
790	}	1330	}
791		1331
		1332	#if EV_PERIODIC_ENABLE
792	if (periodiccnt)	1333	if (periodiccnt)
793	{	1334	{
794	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1335	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
795	if (block > to) block = to;	1336	if (block > to) block = to;
796	}	1337	}
		1338	#endif
797		1339
798	if (block < 0.) block = 0.;	1340	if (expect_false (block < 0.)) block = 0.;
799	}	1341	}
800		1342
801	method_poll (block);	1343	backend_poll (EV_A_ block);
		1344	}
802		1345
803	/* update ev_now, do magic */	1346	/* update ev_rt_now, do magic */
804	time_update ();	1347	time_update (EV_A);
805		1348
806	/* queue pending timers and reschedule them */	1349	/* queue pending timers and reschedule them */
807	timers_reify (); /* relative timers called last */	1350	timers_reify (EV_A); /* relative timers called last */
		1351	#if EV_PERIODIC_ENABLE
808	periodics_reify (); /* absolute timers called first */	1352	periodics_reify (EV_A); /* absolute timers called first */
		1353	#endif
809		1354
810	/* queue idle watchers unless io or timers are pending */	1355	/* queue idle watchers unless other events are pending */
811	if (!pendingcnt)	1356	if (idlecnt && !any_pending (EV_A))
812	queue_events ((W *)idles, idlecnt, EV_IDLE);	1357	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
813		1358
814	/* queue check watchers, to be executed first */	1359	/* queue check watchers, to be executed first */
815	if (checkcnt)	1360	if (expect_false (checkcnt))
816	queue_events ((W *)checks, checkcnt, EV_CHECK);	1361	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
817		1362
818	call_pending ();	1363	call_pending (EV_A);
819	}
820	while (!ev_loop_done);
821		1364
822	if (ev_loop_done != 2)	1365	if (expect_false (loop_done))
		1366	break;
		1367	}
		1368
		1369	if (loop_done == EVUNLOOP_ONE)
		1370	loop_done = EVUNLOOP_CANCEL;
		1371	}
		1372
		1373	void
		1374	ev_unloop (EV_P_ int how)
		1375	{
823	ev_loop_done = 0;	1376	loop_done = how;
824	}	1377	}
825		1378
826	/*****************************************************************************/	1379	/*****************************************************************************/
827		1380
828	static void	1381	void inline_size
829	wlist_add (WL *head, WL elem)	1382	wlist_add (WL *head, WL elem)
830	{	1383	{
831	elem->next = *head;	1384	elem->next = *head;
832	*head = elem;	1385	*head = elem;
833	}	1386	}
834		1387
835	static void	1388	void inline_size
836	wlist_del (WL *head, WL elem)	1389	wlist_del (WL *head, WL elem)
837	{	1390	{
838	while (*head)	1391	while (*head)
839	{	1392	{
840	if (*head == elem)	1393	if (*head == elem)
…		…
845		1398
846	head = &(*head)->next;	1399	head = &(*head)->next;
847	}	1400	}
848	}	1401	}
849		1402
850	static void	1403	void inline_speed
851	ev_clear_pending (W w)	1404	ev_clear_pending (EV_P_ W w)
852	{	1405	{
853	if (w->pending)	1406	if (w->pending)
854	{	1407	{
855	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1408	pendings [ABSPRI (w)][w->pending - 1].w = 0;
856	w->pending = 0;	1409	w->pending = 0;
857	}	1410	}
858	}	1411	}
859		1412
860	static void	1413	void inline_speed
861	ev_start (W w, int active)	1414	ev_start (EV_P_ W w, int active)
862	{	1415	{
		1416	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1417	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1418
863	w->active = active;	1419	w->active = active;
		1420	ev_ref (EV_A);
864	}	1421	}
865		1422
866	static void	1423	void inline_size
867	ev_stop (W w)	1424	ev_stop (EV_P_ W w)
868	{	1425	{
		1426	ev_unref (EV_A);
869	w->active = 0;	1427	w->active = 0;
870	}	1428	}
871		1429
872	/*****************************************************************************/	1430	/*****************************************************************************/
873		1431
874	void	1432	void
875	ev_io_start (struct ev_io *w)	1433	ev_io_start (EV_P_ ev_io *w)
876	{	1434	{
877	int fd = w->fd;	1435	int fd = w->fd;
878		1436
879	if (ev_is_active (w))	1437	if (expect_false (ev_is_active (w)))
880	return;	1438	return;
881		1439
882	assert (("ev_io_start called with negative fd", fd >= 0));	1440	assert (("ev_io_start called with negative fd", fd >= 0));
883		1441
884	ev_start ((W)w, 1);	1442	ev_start (EV_A_ (W)w, 1);
885	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1443	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
886	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1444	wlist_add ((WL *)&anfds[fd].head, (WL)w);
887		1445
888	fd_change (fd);	1446	fd_change (EV_A_ fd);
889	}	1447	}
890		1448
891	void	1449	void
892	ev_io_stop (struct ev_io *w)	1450	ev_io_stop (EV_P_ ev_io *w)
893	{	1451	{
894	ev_clear_pending ((W)w);	1452	ev_clear_pending (EV_A_ (W)w);
895	if (!ev_is_active (w))	1453	if (expect_false (!ev_is_active (w)))
896	return;	1454	return;
		1455
		1456	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
897		1457
898	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1458	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
899	ev_stop ((W)w);	1459	ev_stop (EV_A_ (W)w);
900		1460
901	fd_change (w->fd);	1461	fd_change (EV_A_ w->fd);
902	}	1462	}
903		1463
904	void	1464	void
905	ev_timer_start (struct ev_timer *w)	1465	ev_timer_start (EV_P_ ev_timer *w)
906	{	1466	{
907	if (ev_is_active (w))	1467	if (expect_false (ev_is_active (w)))
908	return;	1468	return;
909		1469
910	w->at += now;	1470	((WT)w)->at += mn_now;
911		1471
912	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1472	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
913		1473
914	ev_start ((W)w, ++timercnt);	1474	ev_start (EV_A_ (W)w, ++timercnt);
915	array_needsize (timers, timermax, timercnt, );	1475	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
916	timers [timercnt - 1] = w;	1476	timers [timercnt - 1] = w;
917	upheap ((WT *)timers, timercnt - 1);	1477	upheap ((WT *)timers, timercnt - 1);
918	}
919		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480	}
		1481
920	void	1482	void
921	ev_timer_stop (struct ev_timer *w)	1483	ev_timer_stop (EV_P_ ev_timer *w)
922	{	1484	{
923	ev_clear_pending ((W)w);	1485	ev_clear_pending (EV_A_ (W)w);
924	if (!ev_is_active (w))	1486	if (expect_false (!ev_is_active (w)))
925	return;	1487	return;
926		1488
		1489	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1490
927	if (w->active < timercnt--)	1491	if (expect_true (((W)w)->active < timercnt--))
928	{	1492	{
929	timers [w->active - 1] = timers [timercnt];	1493	timers [((W)w)->active - 1] = timers [timercnt];
930	downheap ((WT *)timers, timercnt, w->active - 1);	1494	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
931	}	1495	}
932		1496
933	w->at = w->repeat;	1497	((WT)w)->at -= mn_now;
934		1498
935	ev_stop ((W)w);	1499	ev_stop (EV_A_ (W)w);
936	}	1500	}
937		1501
938	void	1502	void
939	ev_timer_again (struct ev_timer *w)	1503	ev_timer_again (EV_P_ ev_timer *w)
940	{	1504	{
941	if (ev_is_active (w))	1505	if (ev_is_active (w))
942	{	1506	{
943	if (w->repeat)	1507	if (w->repeat)
944	{	1508	{
945	w->at = now + w->repeat;	1509	((WT)w)->at = mn_now + w->repeat;
946	downheap ((WT *)timers, timercnt, w->active - 1);	1510	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
947	}	1511	}
948	else	1512	else
949	ev_timer_stop (w);	1513	ev_timer_stop (EV_A_ w);
950	}	1514	}
951	else if (w->repeat)	1515	else if (w->repeat)
		1516	{
		1517	w->at = w->repeat;
952	ev_timer_start (w);	1518	ev_timer_start (EV_A_ w);
		1519	}
953	}	1520	}
954		1521
		1522	#if EV_PERIODIC_ENABLE
955	void	1523	void
956	ev_periodic_start (struct ev_periodic *w)	1524	ev_periodic_start (EV_P_ ev_periodic *w)
957	{	1525	{
958	if (ev_is_active (w))	1526	if (expect_false (ev_is_active (w)))
959	return;	1527	return;
960		1528
		1529	if (w->reschedule_cb)
		1530	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1531	else if (w->interval)
		1532	{
961	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1533	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
962
963	/* this formula differs from the one in periodic_reify because we do not always round up */	1534	/* this formula differs from the one in periodic_reify because we do not always round up */
964	if (w->interval)
965	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1535	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1536	}
966		1537
967	ev_start ((W)w, ++periodiccnt);	1538	ev_start (EV_A_ (W)w, ++periodiccnt);
968	array_needsize (periodics, periodicmax, periodiccnt, );	1539	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
969	periodics [periodiccnt - 1] = w;	1540	periodics [periodiccnt - 1] = w;
970	upheap ((WT *)periodics, periodiccnt - 1);	1541	upheap ((WT *)periodics, periodiccnt - 1);
971	}
972		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544	}
		1545
973	void	1546	void
974	ev_periodic_stop (struct ev_periodic *w)	1547	ev_periodic_stop (EV_P_ ev_periodic *w)
975	{	1548	{
976	ev_clear_pending ((W)w);	1549	ev_clear_pending (EV_A_ (W)w);
977	if (!ev_is_active (w))	1550	if (expect_false (!ev_is_active (w)))
978	return;	1551	return;
979		1552
		1553	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1554
980	if (w->active < periodiccnt--)	1555	if (expect_true (((W)w)->active < periodiccnt--))
981	{	1556	{
982	periodics [w->active - 1] = periodics [periodiccnt];	1557	periodics [((W)w)->active - 1] = periodics [periodiccnt];
983	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1558	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
984	}	1559	}
985		1560
986	ev_stop ((W)w);	1561	ev_stop (EV_A_ (W)w);
987	}	1562	}
988		1563
989	void	1564	void
		1565	ev_periodic_again (EV_P_ ev_periodic *w)
		1566	{
		1567	/* TODO: use adjustheap and recalculation */
		1568	ev_periodic_stop (EV_A_ w);
		1569	ev_periodic_start (EV_A_ w);
		1570	}
		1571	#endif
		1572
		1573	#ifndef SA_RESTART
		1574	# define SA_RESTART 0
		1575	#endif
		1576
		1577	void
990	ev_signal_start (struct ev_signal *w)	1578	ev_signal_start (EV_P_ ev_signal *w)
991	{	1579	{
		1580	#if EV_MULTIPLICITY
		1581	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1582	#endif
992	if (ev_is_active (w))	1583	if (expect_false (ev_is_active (w)))
993	return;	1584	return;
994		1585
995	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1586	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
996		1587
997	ev_start ((W)w, 1);	1588	ev_start (EV_A_ (W)w, 1);
998	array_needsize (signals, signalmax, w->signum, signals_init);	1589	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
999	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1590	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1000		1591
1001	if (!w->next)	1592	if (!((WL)w)->next)
1002	{	1593	{
		1594	#if _WIN32
		1595	signal (w->signum, sighandler);
		1596	#else
1003	struct sigaction sa;	1597	struct sigaction sa;
1004	sa.sa_handler = sighandler;	1598	sa.sa_handler = sighandler;
1005	sigfillset (&sa.sa_mask);	1599	sigfillset (&sa.sa_mask);
1006	sa.sa_flags = 0;	1600	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1007	sigaction (w->signum, &sa, 0);	1601	sigaction (w->signum, &sa, 0);
		1602	#endif
1008	}	1603	}
1009	}	1604	}
1010		1605
1011	void	1606	void
1012	ev_signal_stop (struct ev_signal *w)	1607	ev_signal_stop (EV_P_ ev_signal *w)
1013	{	1608	{
1014	ev_clear_pending ((W)w);	1609	ev_clear_pending (EV_A_ (W)w);
1015	if (!ev_is_active (w))	1610	if (expect_false (!ev_is_active (w)))
1016	return;	1611	return;
1017		1612
1018	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1613	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1019	ev_stop ((W)w);	1614	ev_stop (EV_A_ (W)w);
1020		1615
1021	if (!signals [w->signum - 1].head)	1616	if (!signals [w->signum - 1].head)
1022	signal (w->signum, SIG_DFL);	1617	signal (w->signum, SIG_DFL);
1023	}	1618	}
1024		1619
1025	void	1620	void
		1621	ev_child_start (EV_P_ ev_child *w)
		1622	{
		1623	#if EV_MULTIPLICITY
		1624	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1625	#endif
		1626	if (expect_false (ev_is_active (w)))
		1627	return;
		1628
		1629	ev_start (EV_A_ (W)w, 1);
		1630	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1631	}
		1632
		1633	void
		1634	ev_child_stop (EV_P_ ev_child *w)
		1635	{
		1636	ev_clear_pending (EV_A_ (W)w);
		1637	if (expect_false (!ev_is_active (w)))
		1638	return;
		1639
		1640	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1641	ev_stop (EV_A_ (W)w);
		1642	}
		1643
		1644	#if EV_STAT_ENABLE
		1645
		1646	# ifdef _WIN32
		1647	# undef lstat
		1648	# define lstat(a,b) _stati64 (a,b)
		1649	# endif
		1650
		1651	#define DEF_STAT_INTERVAL 5.0074891
		1652	#define MIN_STAT_INTERVAL 0.1074891
		1653
		1654	void
		1655	ev_stat_stat (EV_P_ ev_stat *w)
		1656	{
		1657	if (lstat (w->path, &w->attr) < 0)
		1658	w->attr.st_nlink = 0;
		1659	else if (!w->attr.st_nlink)
		1660	w->attr.st_nlink = 1;
		1661	}
		1662
		1663	static void
		1664	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1665	{
		1666	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		1667
		1668	/* we copy this here each the time so that */
		1669	/* prev has the old value when the callback gets invoked */
		1670	w->prev = w->attr;
		1671	ev_stat_stat (EV_A_ w);
		1672
		1673	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1674	ev_feed_event (EV_A_ w, EV_STAT);
		1675	}
		1676
		1677	void
		1678	ev_stat_start (EV_P_ ev_stat *w)
		1679	{
		1680	if (expect_false (ev_is_active (w)))
		1681	return;
		1682
		1683	/* since we use memcmp, we need to clear any padding data etc. */
		1684	memset (&w->prev, 0, sizeof (ev_statdata));
		1685	memset (&w->attr, 0, sizeof (ev_statdata));
		1686
		1687	ev_stat_stat (EV_A_ w);
		1688
		1689	if (w->interval < MIN_STAT_INTERVAL)
		1690	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1691
		1692	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1693	ev_set_priority (&w->timer, ev_priority (w));
		1694	ev_timer_start (EV_A_ &w->timer);
		1695
		1696	ev_start (EV_A_ (W)w, 1);
		1697	}
		1698
		1699	void
		1700	ev_stat_stop (EV_P_ ev_stat *w)
		1701	{
		1702	ev_clear_pending (EV_A_ (W)w);
		1703	if (expect_false (!ev_is_active (w)))
		1704	return;
		1705
		1706	ev_timer_stop (EV_A_ &w->timer);
		1707
		1708	ev_stop (EV_A_ (W)w);
		1709	}
		1710	#endif
		1711
		1712	void
1026	ev_idle_start (struct ev_idle *w)	1713	ev_idle_start (EV_P_ ev_idle *w)
1027	{	1714	{
1028	if (ev_is_active (w))	1715	if (expect_false (ev_is_active (w)))
1029	return;	1716	return;
1030		1717
1031	ev_start ((W)w, ++idlecnt);	1718	ev_start (EV_A_ (W)w, ++idlecnt);
1032	array_needsize (idles, idlemax, idlecnt, );	1719	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1033	idles [idlecnt - 1] = w;	1720	idles [idlecnt - 1] = w;
1034	}	1721	}
1035		1722
1036	void	1723	void
1037	ev_idle_stop (struct ev_idle *w)	1724	ev_idle_stop (EV_P_ ev_idle *w)
1038	{	1725	{
1039	ev_clear_pending ((W)w);	1726	ev_clear_pending (EV_A_ (W)w);
1040	if (ev_is_active (w))	1727	if (expect_false (!ev_is_active (w)))
1041	return;	1728	return;
1042		1729
		1730	{
		1731	int active = ((W)w)->active;
1043	idles [w->active - 1] = idles [--idlecnt];	1732	idles [active - 1] = idles [--idlecnt];
		1733	((W)idles [active - 1])->active = active;
		1734	}
		1735
1044	ev_stop ((W)w);	1736	ev_stop (EV_A_ (W)w);
1045	}	1737	}
1046		1738
1047	void	1739	void
1048	ev_prepare_start (struct ev_prepare *w)	1740	ev_prepare_start (EV_P_ ev_prepare *w)
1049	{	1741	{
1050	if (ev_is_active (w))	1742	if (expect_false (ev_is_active (w)))
1051	return;	1743	return;
1052		1744
1053	ev_start ((W)w, ++preparecnt);	1745	ev_start (EV_A_ (W)w, ++preparecnt);
1054	array_needsize (prepares, preparemax, preparecnt, );	1746	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1055	prepares [preparecnt - 1] = w;	1747	prepares [preparecnt - 1] = w;
1056	}	1748	}
1057		1749
1058	void	1750	void
1059	ev_prepare_stop (struct ev_prepare *w)	1751	ev_prepare_stop (EV_P_ ev_prepare *w)
1060	{	1752	{
1061	ev_clear_pending ((W)w);	1753	ev_clear_pending (EV_A_ (W)w);
1062	if (ev_is_active (w))	1754	if (expect_false (!ev_is_active (w)))
1063	return;	1755	return;
1064		1756
		1757	{
		1758	int active = ((W)w)->active;
1065	prepares [w->active - 1] = prepares [--preparecnt];	1759	prepares [active - 1] = prepares [--preparecnt];
		1760	((W)prepares [active - 1])->active = active;
		1761	}
		1762
1066	ev_stop ((W)w);	1763	ev_stop (EV_A_ (W)w);
1067	}	1764	}
1068		1765
1069	void	1766	void
1070	ev_check_start (struct ev_check *w)	1767	ev_check_start (EV_P_ ev_check *w)
1071	{	1768	{
1072	if (ev_is_active (w))	1769	if (expect_false (ev_is_active (w)))
1073	return;	1770	return;
1074		1771
1075	ev_start ((W)w, ++checkcnt);	1772	ev_start (EV_A_ (W)w, ++checkcnt);
1076	array_needsize (checks, checkmax, checkcnt, );	1773	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1077	checks [checkcnt - 1] = w;	1774	checks [checkcnt - 1] = w;
1078	}	1775	}
1079		1776
1080	void	1777	void
1081	ev_check_stop (struct ev_check *w)	1778	ev_check_stop (EV_P_ ev_check *w)
1082	{	1779	{
1083	ev_clear_pending ((W)w);	1780	ev_clear_pending (EV_A_ (W)w);
1084	if (ev_is_active (w))	1781	if (expect_false (!ev_is_active (w)))
1085	return;	1782	return;
1086		1783
		1784	{
		1785	int active = ((W)w)->active;
1087	checks [w->active - 1] = checks [--checkcnt];	1786	checks [active - 1] = checks [--checkcnt];
		1787	((W)checks [active - 1])->active = active;
		1788	}
		1789
1088	ev_stop ((W)w);	1790	ev_stop (EV_A_ (W)w);
1089	}	1791	}
1090		1792
1091	void	1793	#if EV_EMBED_ENABLE
1092	ev_child_start (struct ev_child *w)	1794	void noinline
		1795	ev_embed_sweep (EV_P_ ev_embed *w)
1093	{	1796	{
		1797	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1798	}
		1799
		1800	static void
		1801	embed_cb (EV_P_ ev_io *io, int revents)
		1802	{
		1803	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		1804
1094	if (ev_is_active (w))	1805	if (ev_cb (w))
1095	return;	1806	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1807	else
		1808	ev_embed_sweep (loop, w);
		1809	}
1096		1810
		1811	void
		1812	ev_embed_start (EV_P_ ev_embed *w)
		1813	{
		1814	if (expect_false (ev_is_active (w)))
		1815	return;
		1816
		1817	{
		1818	struct ev_loop *loop = w->loop;
		1819	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1820	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1821	}
		1822
		1823	ev_set_priority (&w->io, ev_priority (w));
		1824	ev_io_start (EV_A_ &w->io);
		1825
1097	ev_start ((W)w, 1);	1826	ev_start (EV_A_ (W)w, 1);
1098	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1099	}	1827	}
1100		1828
1101	void	1829	void
1102	ev_child_stop (struct ev_child *w)	1830	ev_embed_stop (EV_P_ ev_embed *w)
1103	{	1831	{
1104	ev_clear_pending ((W)w);	1832	ev_clear_pending (EV_A_ (W)w);
1105	if (ev_is_active (w))	1833	if (expect_false (!ev_is_active (w)))
1106	return;	1834	return;
1107		1835
1108	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1836	ev_io_stop (EV_A_ &w->io);
		1837
1109	ev_stop ((W)w);	1838	ev_stop (EV_A_ (W)w);
1110	}	1839	}
		1840	#endif
		1841
		1842	#if EV_FORK_ENABLE
		1843	void
		1844	ev_fork_start (EV_P_ ev_fork *w)
		1845	{
		1846	if (expect_false (ev_is_active (w)))
		1847	return;
		1848
		1849	ev_start (EV_A_ (W)w, ++forkcnt);
		1850	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		1851	forks [forkcnt - 1] = w;
		1852	}
		1853
		1854	void
		1855	ev_fork_stop (EV_P_ ev_fork *w)
		1856	{
		1857	ev_clear_pending (EV_A_ (W)w);
		1858	if (expect_false (!ev_is_active (w)))
		1859	return;
		1860
		1861	{
		1862	int active = ((W)w)->active;
		1863	forks [active - 1] = forks [--forkcnt];
		1864	((W)forks [active - 1])->active = active;
		1865	}
		1866
		1867	ev_stop (EV_A_ (W)w);
		1868	}
		1869	#endif
1111		1870
1112	/*****************************************************************************/	1871	/*****************************************************************************/
1113		1872
1114	struct ev_once	1873	struct ev_once
1115	{	1874	{
1116	struct ev_io io;	1875	ev_io io;
1117	struct ev_timer to;	1876	ev_timer to;
1118	void (cb)(int revents, void arg);	1877	void (cb)(int revents, void arg);
1119	void *arg;	1878	void *arg;
1120	};	1879	};
1121		1880
1122	static void	1881	static void
1123	once_cb (struct ev_once *once, int revents)	1882	once_cb (EV_P_ struct ev_once *once, int revents)
1124	{	1883	{
1125	void (cb)(int revents, void arg) = once->cb;	1884	void (cb)(int revents, void arg) = once->cb;
1126	void *arg = once->arg;	1885	void *arg = once->arg;
1127		1886
1128	ev_io_stop (&once->io);	1887	ev_io_stop (EV_A_ &once->io);
1129	ev_timer_stop (&once->to);	1888	ev_timer_stop (EV_A_ &once->to);
1130	free (once);	1889	ev_free (once);
1131		1890
1132	cb (revents, arg);	1891	cb (revents, arg);
1133	}	1892	}
1134		1893
1135	static void	1894	static void
1136	once_cb_io (struct ev_io *w, int revents)	1895	once_cb_io (EV_P_ ev_io *w, int revents)
1137	{	1896	{
1138	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1897	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1139	}	1898	}
1140		1899
1141	static void	1900	static void
1142	once_cb_to (struct ev_timer *w, int revents)	1901	once_cb_to (EV_P_ ev_timer *w, int revents)
1143	{	1902	{
1144	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1903	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1145	}	1904	}
1146		1905
1147	void	1906	void
1148	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1907	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1149	{	1908	{
1150	struct ev_once *once = malloc (sizeof (struct ev_once));	1909	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1151		1910
1152	if (!once)	1911	if (expect_false (!once))
		1912	{
1153	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1913	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1154	else	1914	return;
1155	{	1915	}
		1916
1156	once->cb = cb;	1917	once->cb = cb;
1157	once->arg = arg;	1918	once->arg = arg;
1158		1919
1159	ev_watcher_init (&once->io, once_cb_io);	1920	ev_init (&once->io, once_cb_io);
1160	if (fd >= 0)	1921	if (fd >= 0)
1161	{	1922	{
1162	ev_io_set (&once->io, fd, events);	1923	ev_io_set (&once->io, fd, events);
1163	ev_io_start (&once->io);	1924	ev_io_start (EV_A_ &once->io);
1164	}	1925	}
1165		1926
1166	ev_watcher_init (&once->to, once_cb_to);	1927	ev_init (&once->to, once_cb_to);
1167	if (timeout >= 0.)	1928	if (timeout >= 0.)
1168	{	1929	{
1169	ev_timer_set (&once->to, timeout, 0.);	1930	ev_timer_set (&once->to, timeout, 0.);
1170	ev_timer_start (&once->to);	1931	ev_timer_start (EV_A_ &once->to);
1171	}
1172	}
1173	}
1174
1175	/*****************************************************************************/
1176
1177	#if 0
1178
1179	struct ev_io wio;
1180
1181	static void
1182	sin_cb (struct ev_io *w, int revents)
1183	{
1184	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1185	}
1186
1187	static void
1188	ocb (struct ev_timer *w, int revents)
1189	{
1190	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1191	ev_timer_stop (w);
1192	ev_timer_start (w);
1193	}
1194
1195	static void
1196	scb (struct ev_signal *w, int revents)
1197	{
1198	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1199	ev_io_stop (&wio);
1200	ev_io_start (&wio);
1201	}
1202
1203	static void
1204	gcb (struct ev_signal *w, int revents)
1205	{
1206	fprintf (stderr, "generic %x\n", revents);
1207
1208	}
1209
1210	int main (void)
1211	{
1212	ev_init (0);
1213
1214	ev_io_init (&wio, sin_cb, 0, EV_READ);
1215	ev_io_start (&wio);
1216
1217	struct ev_timer t[10000];
1218
1219	#if 0
1220	int i;
1221	for (i = 0; i < 10000; ++i)
1222	{	1932	}
1223	struct ev_timer *w = t + i;
1224	ev_watcher_init (w, ocb, i);
1225	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1226	ev_timer_start (w);
1227	if (drand48 () < 0.5)
1228	ev_timer_stop (w);
1229	}
1230	#endif
1231
1232	struct ev_timer t1;
1233	ev_timer_init (&t1, ocb, 5, 10);
1234	ev_timer_start (&t1);
1235
1236	struct ev_signal sig;
1237	ev_signal_init (&sig, scb, SIGQUIT);
1238	ev_signal_start (&sig);
1239
1240	struct ev_check cw;
1241	ev_check_init (&cw, gcb);
1242	ev_check_start (&cw);
1243
1244	struct ev_idle iw;
1245	ev_idle_init (&iw, gcb);
1246	ev_idle_start (&iw);
1247
1248	ev_loop (0);
1249
1250	return 0;
1251	}	1933	}
1252		1934
		1935	#ifdef __cplusplus
		1936	}
1253	#endif	1937	#endif
1254		1938
1255
1256
1257

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Comparing libev/ev.c (file contents): Revision 1.42 by root, Fri Nov 2 20:05:05 2007 UTC vs. Revision 1.148 by root, Tue Nov 27 11:11:13 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.42 by root, Fri Nov 2 20:05:05 2007 UTC vs.
Revision 1.148 by root, Tue Nov 27 11:11:13 2007 UTC