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

Comparing libev/ev.c (file contents):
Revision 1.41 by root, Fri Nov 2 16:54:34 2007 UTC vs.
Revision 1.143 by root, Tue Nov 27 07:27:10 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)
99	# define inline static	202	# define inline_speed static
		203	# define inline_minimal 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
		210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
105	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
106	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
107	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
108		219
109	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
110	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
111	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
112		315
113	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
114		317
115	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
116	static void (*method_modify)(int fd, int oev, int nev);
117	static void (*method_poll)(ev_tstamp timeout);
118		319
119	/*****************************************************************************/	320	/*****************************************************************************/
120		321
121	ev_tstamp	322	ev_tstamp
122	ev_time (void)	323	ev_time (void)
…		…
130	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
131	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
132	#endif	333	#endif
133	}	334	}
134		335
135	static ev_tstamp	336	ev_tstamp inline_size
136	get_clock (void)	337	get_clock (void)
137	{	338	{
138	#if EV_USE_MONOTONIC	339	#if EV_USE_MONOTONIC
139	if (expect_true (have_monotonic))	340	if (expect_true (have_monotonic))
140	{	341	{
…		…
145	#endif	346	#endif
146		347
147	return ev_time ();	348	return ev_time ();
148	}	349	}
149		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
150	#define array_roundsize(base,n) ((n) \| 4 & ~3)	359	#define array_roundsize(type,n) (((n) \| 4) & ~3)
151		360
152	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
153	if (expect_false ((cnt) > cur)) \	362	if (expect_false ((cnt) > cur)) \
154	{ \	363	{ \
155	int newcnt = cur; \	364	int newcnt = cur; \
156	do \	365	do \
157	{ \	366	{ \
158	newcnt = array_roundsize (base, newcnt << 1); \	367	newcnt = array_roundsize (type, newcnt << 1); \
159	} \	368	} \
160	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
161	\	370	\
162	base = realloc (base, sizeof (base) (newcnt)); \	371	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
163	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
164	cur = newcnt; \	373	cur = newcnt; \
165	}	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;
166		386
167	/*****************************************************************************/	387	/*****************************************************************************/
168		388
169	typedef struct	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
170	{	391	{
171	struct ev_io *head;	392	W w_ = (W)w;
172	unsigned char events;
173	unsigned char reify;
174	} ANFD;
175		393
176	static ANFD *anfds;	394	if (expect_false (w_->pending))
177	static int anfdmax;	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		397	return;
		398	}
178		399
179	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
180	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
181	{	419	{
182	while (count--)	420	while (count--)
183	{	421	{
184	base->head = 0;	422	base->head = 0;
…		…
187		425
188	++base;	426	++base;
189	}	427	}
190	}	428	}
191		429
192	typedef struct	430	void inline_speed
193	{
194	W w;
195	int events;
196	} ANPENDING;
197
198	static ANPENDING *pendings;
199	static int pendingmax, pendingcnt;
200
201	static void
202	event (W w, int events)
203	{
204	if (w->pending)
205	{
206	pendings [w->pending - 1].events \|= events;
207	return;
208	}
209
210	w->pending = ++pendingcnt;
211	array_needsize (pendings, pendingmax, pendingcnt, );
212	pendings [pendingcnt - 1].w = w;
213	pendings [pendingcnt - 1].events = events;
214	}
215
216	static void
217	queue_events (W *events, int eventcnt, int type)
218	{
219	int i;
220
221	for (i = 0; i < eventcnt; ++i)
222	event (events [i], type);
223	}
224
225	static void
226	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
227	{	432	{
228	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
229	struct ev_io *w;	434	ev_io *w;
230		435
231	for (w = anfd->head; w; w = w->next)	436	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
232	{	437	{
233	int ev = w->events & events;	438	int ev = w->events & revents;
234		439
235	if (ev)	440	if (ev)
236	event ((W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
237	}	442	}
238	}	443	}
239		444
240	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
241		450
242	static int *fdchanges;	451	void inline_size
243	static int fdchangemax, fdchangecnt;	452	fd_reify (EV_P)
244
245	static void
246	fd_reify (void)
247	{	453	{
248	int i;	454	int i;
249		455
250	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
251	{	457	{
252	int fd = fdchanges [i];	458	int fd = fdchanges [i];
253	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
254	struct ev_io *w;	460	ev_io *w;
255		461
256	int events = 0;	462	int events = 0;
257		463
258	for (w = anfd->head; w; w = w->next)	464	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
259	events \|= w->events;	465	events \|= w->events;
260		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
261	anfd->reify = 0;	476	anfd->reify = 0;
262		477
263	if (anfd->events != events)
264	{
265	method_modify (fd, anfd->events, events);	478	backend_modify (EV_A_ fd, anfd->events, events);
266	anfd->events = events;	479	anfd->events = events;
267	}
268	}	480	}
269		481
270	fdchangecnt = 0;	482	fdchangecnt = 0;
271	}	483	}
272		484
273	static void	485	void inline_size
274	fd_change (int fd)	486	fd_change (EV_P_ int fd)
275	{	487	{
276	if (anfds [fd].reify \|\| fdchangecnt < 0)	488	if (expect_false (anfds [fd].reify))
277	return;	489	return;
278		490
279	anfds [fd].reify = 1;	491	anfds [fd].reify = 1;
280		492
281	++fdchangecnt;	493	++fdchangecnt;
282	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
283	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
284	}	496	}
285		497
286	static void	498	void inline_speed
287	fd_kill (int fd)	499	fd_kill (EV_P_ int fd)
288	{	500	{
289	struct ev_io *w;	501	ev_io *w;
290		502
291	printf ("killing fd %d\n", fd);//D
292	while ((w = anfds [fd].head))	503	while ((w = (ev_io *)anfds [fd].head))
293	{	504	{
294	ev_io_stop (w);	505	ev_io_stop (EV_A_ w);
295	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);	506	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
296	}	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
297	}	518	}
298		519
299	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
300	static void	521	static void noinline
301	fd_ebadf (void)	522	fd_ebadf (EV_P)
302	{	523	{
303	int fd;	524	int fd;
304		525
305	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
306	if (anfds [fd].events)	527	if (anfds [fd].events)
307	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
308	fd_kill (fd);	529	fd_kill (EV_A_ fd);
309	}	530	}
310		531
311	/* 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 */
312	static void	533	static void noinline
313	fd_enomem (void)	534	fd_enomem (EV_P)
314	{	535	{
315	int fd = anfdmax;	536	int fd;
316		537
317	while (fd--)	538	for (fd = anfdmax; fd--; )
318	if (anfds [fd].events)	539	if (anfds [fd].events)
319	{	540	{
320	close (fd);
321	fd_kill (fd);	541	fd_kill (EV_A_ fd);
322	return;	542	return;
323	}	543	}
324	}	544	}
325		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
326	/*****************************************************************************/	561	/*****************************************************************************/
327		562
328	static struct ev_timer **timers;	563	void inline_speed
329	static int timermax, timercnt;
330
331	static struct ev_periodic **periodics;
332	static int periodicmax, periodiccnt;
333
334	static void
335	upheap (WT *timers, int k)	564	upheap (WT *heap, int k)
336	{	565	{
337	WT w = timers [k];	566	WT w = heap [k];
338		567
339	while (k && timers [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
340	{	569	{
341	timers [k] = timers [k >> 1];	570	heap [k] = heap [k >> 1];
342	timers [k]->active = k + 1;	571	((W)heap [k])->active = k + 1;
343	k >>= 1;	572	k >>= 1;
344	}	573	}
345		574
346	timers [k] = w;	575	heap [k] = w;
347	timers [k]->active = k + 1;	576	((W)heap [k])->active = k + 1;
348		577
349	}	578	}
350		579
351	static void	580	void inline_speed
352	downheap (WT *timers, int N, int k)	581	downheap (WT *heap, int N, int k)
353	{	582	{
354	WT w = timers [k];	583	WT w = heap [k];
355		584
356	while (k < (N >> 1))	585	while (k < (N >> 1))
357	{	586	{
358	int j = k << 1;	587	int j = k << 1;
359		588
360	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
361	++j;	590	++j;
362		591
363	if (w->at <= timers [j]->at)	592	if (w->at <= heap [j]->at)
364	break;	593	break;
365		594
366	timers [k] = timers [j];	595	heap [k] = heap [j];
367	timers [k]->active = k + 1;	596	((W)heap [k])->active = k + 1;
368	k = j;	597	k = j;
369	}	598	}
370		599
371	timers [k] = w;	600	heap [k] = w;
372	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);
373	}	609	}
374		610
375	/*****************************************************************************/	611	/*****************************************************************************/
376		612
377	typedef struct	613	typedef struct
378	{	614	{
379	struct ev_signal *head;	615	WL head;
380	sig_atomic_t volatile gotsig;	616	sig_atomic_t volatile gotsig;
381	} ANSIG;	617	} ANSIG;
382		618
383	static ANSIG *signals;	619	static ANSIG *signals;
384	static int signalmax;	620	static int signalmax;
385		621
386	static int sigpipe [2];	622	static int sigpipe [2];
387	static sig_atomic_t volatile gotsig;	623	static sig_atomic_t volatile gotsig;
388	static struct ev_io sigev;	624	static ev_io sigev;
389		625
390	static void	626	void inline_size
391	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
392	{	628	{
393	while (count--)	629	while (count--)
394	{	630	{
395	base->head = 0;	631	base->head = 0;
…		…
400	}	636	}
401		637
402	static void	638	static void
403	sighandler (int signum)	639	sighandler (int signum)
404	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
405	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
406		646
407	if (!gotsig)	647	if (!gotsig)
408	{	648	{
		649	int old_errno = errno;
409	gotsig = 1;	650	gotsig = 1;
410	write (sigpipe [1], &signum, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
411	}	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);
412	}	674	}
413		675
414	static void	676	static void
415	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
416	{	678	{
417	struct ev_signal *w;
418	int signum;	679	int signum;
419		680
420	read (sigpipe [0], &revents, 1);	681	read (sigpipe [0], &revents, 1);
421	gotsig = 0;	682	gotsig = 0;
422		683
423	for (signum = signalmax; signum--; )	684	for (signum = signalmax; signum--; )
424	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)
425	{	727	{
426	signals [signum].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it now */
427		729	w->rpid = pid;
428	for (w = signals [signum].head; w; w = w->next)	730	w->rstatus = status;
429	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
430	}	732	}
431	}	733	}
432
433	static void
434	siginit (void)
435	{
436	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
437	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
438
439	/* rather than sort out wether we really need nb, set it */
440	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
441	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
442
443	ev_io_set (&sigev, sigpipe [0], EV_READ);
444	ev_io_start (&sigev);
445	}
446
447	/*****************************************************************************/
448
449	static struct ev_idle **idles;
450	static int idlemax, idlecnt;
451
452	static struct ev_prepare **prepares;
453	static int preparemax, preparecnt;
454
455	static struct ev_check **checks;
456	static int checkmax, checkcnt;
457
458	/*****************************************************************************/
459
460	static struct ev_child *childs [PID_HASHSIZE];
461	static struct ev_signal childev;
462		734
463	#ifndef WCONTINUED	735	#ifndef WCONTINUED
464	# define WCONTINUED 0	736	# define WCONTINUED 0
465	#endif	737	#endif
466		738
467	static void	739	static void
468	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
469	{	741	{
470	struct ev_child *w;
471	int pid, status;	742	int pid, status;
472		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
473	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
474	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	746	if (!WCONTINUED
475	if (w->pid == pid \|\| !w->pid)	747	\|\| errno != EINVAL
476	{	748	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
477	w->status = status;	749	return;
478	event ((W)w, EV_CHILD);	750
479	}	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 */
480	}	757	}
		758
		759	#endif
481		760
482	/*****************************************************************************/	761	/*****************************************************************************/
483		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
484	#if EV_USE_EPOLL	769	#if EV_USE_EPOLL
485	# include "ev_epoll.c"	770	# include "ev_epoll.c"
486	#endif	771	#endif
487	#if EV_USE_POLL	772	#if EV_USE_POLL
488	# include "ev_poll.c"	773	# include "ev_poll.c"
…		…
501	ev_version_minor (void)	786	ev_version_minor (void)
502	{	787	{
503	return EV_VERSION_MINOR;	788	return EV_VERSION_MINOR;
504	}	789	}
505		790
506	/* 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 */
507	static int	792	int inline_size
508	enable_secure ()	793	enable_secure (void)
509	{	794	{
		795	#ifdef _WIN32
		796	return 0;
		797	#else
510	return getuid () != geteuid ()	798	return getuid () != geteuid ()
511	\|\| getgid () != getegid ();	799	\|\| getgid () != getegid ();
		800	#endif
512	}	801	}
513		802
514	int ev_init (int methods)	803	unsigned int
		804	ev_supported_backends (void)
515	{	805	{
516	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)
517	{	853	{
518	#if EV_USE_MONOTONIC	854	#if EV_USE_MONOTONIC
519	{	855	{
520	struct timespec ts;	856	struct timespec ts;
521	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
522	have_monotonic = 1;	858	have_monotonic = 1;
523	}	859	}
524	#endif	860	#endif
525		861
526	ev_now = ev_time ();	862	ev_rt_now = ev_time ();
527	now = get_clock ();	863	mn_now = get_clock ();
528	now_floor = now;	864	now_floor = mn_now;
529	diff = ev_now - now;	865	rtmn_diff = ev_rt_now - mn_now;
530		866
531	if (pipe (sigpipe))	867	if (!(flags & EVFLAG_NOENV)
532	return 0;	868	&& !enable_secure ()
533		869	&& getenv ("LIBEV_FLAGS"))
534	if (methods == EVMETHOD_AUTO)
535	if (!enable_secure () && getenv ("LIBEV_METHODS"))
536	methods = atoi (getenv ("LIBEV_METHODS"));	870	flags = atoi (getenv ("LIBEV_FLAGS"));
537	else
538	methods = EVMETHOD_ANY;
539		871
540	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
541	#if EV_USE_EPOLL	882	#if EV_USE_EPOLL
542	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
543	#endif	884	#endif
544	#if EV_USE_POLL	885	#if EV_USE_POLL
545	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
546	#endif	887	#endif
547	#if EV_USE_SELECT	888	#if EV_USE_SELECT
548	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
549	#endif	890	#endif
550		891
551	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))
552	{	1019	{
553	ev_watcher_init (&sigev, sigcb);
554	siginit ();	1020	siginit (EV_A);
555		1021
		1022	#ifndef _WIN32
556	ev_signal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
557	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
558	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
559	}	1031	}
560		1032
561	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;
562	}	1066	}
563		1067
564	/*****************************************************************************/	1068	/*****************************************************************************/
565		1069
566	void	1070	int inline_size
567	ev_fork_prepare (void)	1071	any_pending (EV_P)
568	{	1072	{
569	/* nop */	1073	int pri;
570	}
571		1074
572	void	1075	for (pri = NUMPRI; pri--; )
573	ev_fork_parent (void)	1076	if (pendingcnt [pri])
574	{	1077	return 1;
575	/* nop */
576	}
577		1078
578	void	1079	return 0;
579	ev_fork_child (void)
580	{
581	#if EV_USE_EPOLL
582	if (ev_method == EVMETHOD_EPOLL)
583	epoll_postfork_child ();
584	#endif
585
586	ev_io_stop (&sigev);
587	close (sigpipe [0]);
588	close (sigpipe [1]);
589	pipe (sigpipe);
590	siginit ();
591	}	1080	}
592		1081
593	/*****************************************************************************/	1082	void inline_speed
594
595	static void
596	call_pending (void)	1083	call_pending (EV_P)
597	{	1084	{
		1085	int pri;
		1086
		1087	for (pri = NUMPRI; pri--; )
598	while (pendingcnt)	1088	while (pendingcnt [pri])
599	{	1089	{
600	ANPENDING *p = pendings + --pendingcnt;	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
601		1091
602	if (p->w)	1092	if (expect_true (p->w))
603	{	1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
604	p->w->pending = 0;	1096	p->w->pending = 0;
605	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
606	}	1098	}
607	}	1099	}
608	}	1100	}
609		1101
610	static void	1102	void inline_size
611	timers_reify (void)	1103	timers_reify (EV_P)
612	{	1104	{
613	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
614	{	1106	{
615	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)));
616		1110
617	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
618	if (w->repeat)	1112	if (w->repeat)
619	{	1113	{
620	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
621	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
622	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
623	}	1121	}
624	else	1122	else
625	ev_timer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
626		1124
627	event ((W)w, EV_TIMEOUT);	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
628	}	1126	}
629	}	1127	}
630		1128
631	static void	1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
632	periodics_reify (void)	1131	periodics_reify (EV_P)
633	{	1132	{
634	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
635	{	1134	{
636	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)));
637		1138
638	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
639	if (w->interval)	1140	if (w->reschedule_cb)
640	{	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	{
641	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;
642	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));
643	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
644	}	1151	}
645	else	1152	else
646	ev_periodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
647		1154
648	event ((W)w, EV_PERIODIC);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
649	}	1156	}
650	}	1157	}
651		1158
652	static void	1159	static void noinline
653	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
654	{	1161	{
655	int i;	1162	int i;
656		1163
657	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
658	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
659	{	1166	{
660	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
661		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
662	if (w->interval)	1171	else if (w->interval)
663	{
664	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;
665
666	if (fabs (diff) >= 1e-4)
667	{
668	ev_periodic_stop (w);
669	ev_periodic_start (w);
670
671	i = 0; /* restart loop, inefficient, but time jumps should be rare */
672	}
673	}
674	}	1173	}
675	}
676		1174
677	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
678	time_update_monotonic (void)	1182	time_update_monotonic (EV_P)
679	{	1183	{
680	now = get_clock ();	1184	mn_now = get_clock ();
681		1185
682	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
683	{	1187	{
684	ev_now = now + diff;	1188	ev_rt_now = rtmn_diff + mn_now;
685	return 0;	1189	return 0;
686	}	1190	}
687	else	1191	else
688	{	1192	{
689	now_floor = now;	1193	now_floor = mn_now;
690	ev_now = ev_time ();	1194	ev_rt_now = ev_time ();
691	return 1;	1195	return 1;
692	}	1196	}
693	}	1197	}
694		1198
695	static void	1199	void inline_size
696	time_update (void)	1200	time_update (EV_P)
697	{	1201	{
698	int i;	1202	int i;
699		1203
700	#if EV_USE_MONOTONIC	1204	#if EV_USE_MONOTONIC
701	if (expect_true (have_monotonic))	1205	if (expect_true (have_monotonic))
702	{	1206	{
703	if (time_update_monotonic ())	1207	if (time_update_monotonic (EV_A))
704	{	1208	{
705	ev_tstamp odiff = diff;	1209	ev_tstamp odiff = rtmn_diff;
706		1210
707	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; )
708	{	1220	{
709	diff = ev_now - now;	1221	rtmn_diff = ev_rt_now - mn_now;
710		1222
711	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
712	return; /* all is well */	1224	return; /* all is well */
713		1225
714	ev_now = ev_time ();	1226	ev_rt_now = ev_time ();
715	now = get_clock ();	1227	mn_now = get_clock ();
716	now_floor = now;	1228	now_floor = mn_now;
717	}	1229	}
718		1230
		1231	# if EV_PERIODIC_ENABLE
719	periodics_reschedule (diff - odiff);	1232	periodics_reschedule (EV_A);
		1233	# endif
720	/* 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) */
721	}	1236	}
722	}	1237	}
723	else	1238	else
724	#endif	1239	#endif
725	{	1240	{
726	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
727		1242
728	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))
729	{	1244	{
		1245	#if EV_PERIODIC_ENABLE
730	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
731		1248
732	/* 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 */
733	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
734	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
735	}	1252	}
736		1253
737	now = ev_now;	1254	mn_now = ev_rt_now;
738	}	1255	}
739	}	1256	}
740		1257
741	int ev_loop_done;	1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
742		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
743	void ev_loop (int flags)	1273	ev_loop (EV_P_ int flags)
744	{	1274	{
745	double block;
746	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1275	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
747		1278
748	do	1279	while (activecnt)
749	{	1280	{
750	/* queue check watchers (and execute them) */	1281	/* queue check watchers (and execute them) */
751	if (expect_false (preparecnt))	1282	if (expect_false (preparecnt))
752	{	1283	{
753	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1284	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
754	call_pending ();	1285	call_pending (EV_A);
755	}	1286	}
756		1287
		1288	/* we might have forked, so reify kernel state if necessary */
		1289	if (expect_false (postfork))
		1290	loop_fork (EV_A);
		1291
757	/* update fd-related kernel structures */	1292	/* update fd-related kernel structures */
758	fd_reify ();	1293	fd_reify (EV_A);
759		1294
760	/* calculate blocking time */	1295	/* calculate blocking time */
		1296	{
		1297	double block;
761		1298
762	/* we only need this for !monotonic clockor timers, but as we basically	1299	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
763	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 */
764	#if EV_USE_MONOTONIC	1304	#if EV_USE_MONOTONIC
765	if (expect_true (have_monotonic))	1305	if (expect_true (have_monotonic))
766	time_update_monotonic ();	1306	time_update_monotonic (EV_A);
767	else	1307	else
768	#endif	1308	#endif
769	{	1309	{
770	ev_now = ev_time ();	1310	ev_rt_now = ev_time ();
771	now = ev_now;	1311	mn_now = ev_rt_now;
772	}	1312	}
773		1313
774	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
775	block = 0.;
776	else
777	{
778	block = MAX_BLOCKTIME;	1314	block = MAX_BLOCKTIME;
779		1315
780	if (timercnt)	1316	if (timercnt)
781	{	1317	{
782	ev_tstamp to = timers [0]->at - now + method_fudge;	1318	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
783	if (block > to) block = to;	1319	if (block > to) block = to;
784	}	1320	}
785		1321
		1322	#if EV_PERIODIC_ENABLE
786	if (periodiccnt)	1323	if (periodiccnt)
787	{	1324	{
788	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1325	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
789	if (block > to) block = to;	1326	if (block > to) block = to;
790	}	1327	}
		1328	#endif
791		1329
792	if (block < 0.) block = 0.;	1330	if (expect_false (block < 0.)) block = 0.;
793	}	1331	}
794		1332
795	method_poll (block);	1333	backend_poll (EV_A_ block);
		1334	}
796		1335
797	/* update ev_now, do magic */	1336	/* update ev_rt_now, do magic */
798	time_update ();	1337	time_update (EV_A);
799		1338
800	/* queue pending timers and reschedule them */	1339	/* queue pending timers and reschedule them */
801	timers_reify (); /* relative timers called last */	1340	timers_reify (EV_A); /* relative timers called last */
		1341	#if EV_PERIODIC_ENABLE
802	periodics_reify (); /* absolute timers called first */	1342	periodics_reify (EV_A); /* absolute timers called first */
		1343	#endif
803		1344
804	/* queue idle watchers unless io or timers are pending */	1345	/* queue idle watchers unless other events are pending */
805	if (!pendingcnt)	1346	if (idlecnt && !any_pending (EV_A))
806	queue_events ((W *)idles, idlecnt, EV_IDLE);	1347	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
807		1348
808	/* queue check watchers, to be executed first */	1349	/* queue check watchers, to be executed first */
809	if (checkcnt)	1350	if (expect_false (checkcnt))
810	queue_events ((W *)checks, checkcnt, EV_CHECK);	1351	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
811		1352
812	call_pending ();	1353	call_pending (EV_A);
813	}
814	while (!ev_loop_done);
815		1354
816	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	{
817	ev_loop_done = 0;	1366	loop_done = how;
818	}	1367	}
819		1368
820	/*****************************************************************************/	1369	/*****************************************************************************/
821		1370
822	static void	1371	void inline_size
823	wlist_add (WL *head, WL elem)	1372	wlist_add (WL *head, WL elem)
824	{	1373	{
825	elem->next = *head;	1374	elem->next = *head;
826	*head = elem;	1375	*head = elem;
827	}	1376	}
828		1377
829	static void	1378	void inline_size
830	wlist_del (WL *head, WL elem)	1379	wlist_del (WL *head, WL elem)
831	{	1380	{
832	while (*head)	1381	while (*head)
833	{	1382	{
834	if (*head == elem)	1383	if (*head == elem)
…		…
839		1388
840	head = &(*head)->next;	1389	head = &(*head)->next;
841	}	1390	}
842	}	1391	}
843		1392
844	static void	1393	void inline_speed
845	ev_clear_pending (W w)	1394	ev_clear_pending (EV_P_ W w)
846	{	1395	{
847	if (w->pending)	1396	if (w->pending)
848	{	1397	{
849	pendings [w->pending - 1].w = 0;	1398	pendings [ABSPRI (w)][w->pending - 1].w = 0;
850	w->pending = 0;	1399	w->pending = 0;
851	}	1400	}
852	}	1401	}
853		1402
854	static void	1403	void inline_speed
855	ev_start (W w, int active)	1404	ev_start (EV_P_ W w, int active)
856	{	1405	{
		1406	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1407	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1408
857	w->active = active;	1409	w->active = active;
		1410	ev_ref (EV_A);
858	}	1411	}
859		1412
860	static void	1413	void inline_size
861	ev_stop (W w)	1414	ev_stop (EV_P_ W w)
862	{	1415	{
		1416	ev_unref (EV_A);
863	w->active = 0;	1417	w->active = 0;
864	}	1418	}
865		1419
866	/*****************************************************************************/	1420	/*****************************************************************************/
867		1421
868	void	1422	void
869	ev_io_start (struct ev_io *w)	1423	ev_io_start (EV_P_ ev_io *w)
870	{	1424	{
871	int fd = w->fd;	1425	int fd = w->fd;
872		1426
873	if (ev_is_active (w))	1427	if (expect_false (ev_is_active (w)))
874	return;	1428	return;
875		1429
876	assert (("ev_io_start called with negative fd", fd >= 0));	1430	assert (("ev_io_start called with negative fd", fd >= 0));
877		1431
878	ev_start ((W)w, 1);	1432	ev_start (EV_A_ (W)w, 1);
879	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1433	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
880	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1434	wlist_add ((WL *)&anfds[fd].head, (WL)w);
881		1435
882	fd_change (fd);	1436	fd_change (EV_A_ fd);
883	}	1437	}
884		1438
885	void	1439	void
886	ev_io_stop (struct ev_io *w)	1440	ev_io_stop (EV_P_ ev_io *w)
887	{	1441	{
888	ev_clear_pending ((W)w);	1442	ev_clear_pending (EV_A_ (W)w);
889	if (!ev_is_active (w))	1443	if (expect_false (!ev_is_active (w)))
890	return;	1444	return;
		1445
		1446	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
891		1447
892	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1448	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
893	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
894		1450
895	fd_change (w->fd);	1451	fd_change (EV_A_ w->fd);
896	}	1452	}
897		1453
898	void	1454	void
899	ev_timer_start (struct ev_timer *w)	1455	ev_timer_start (EV_P_ ev_timer *w)
900	{	1456	{
901	if (ev_is_active (w))	1457	if (expect_false (ev_is_active (w)))
902	return;	1458	return;
903		1459
904	w->at += now;	1460	((WT)w)->at += mn_now;
905		1461
906	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.));
907		1463
908	ev_start ((W)w, ++timercnt);	1464	ev_start (EV_A_ (W)w, ++timercnt);
909	array_needsize (timers, timermax, timercnt, );	1465	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
910	timers [timercnt - 1] = w;	1466	timers [timercnt - 1] = w;
911	upheap ((WT *)timers, timercnt - 1);	1467	upheap ((WT *)timers, timercnt - 1);
912	}
913		1468
		1469	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1470	}
		1471
914	void	1472	void
915	ev_timer_stop (struct ev_timer *w)	1473	ev_timer_stop (EV_P_ ev_timer *w)
916	{	1474	{
917	ev_clear_pending ((W)w);	1475	ev_clear_pending (EV_A_ (W)w);
918	if (!ev_is_active (w))	1476	if (expect_false (!ev_is_active (w)))
919	return;	1477	return;
920		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480
921	if (w->active < timercnt--)	1481	if (expect_true (((W)w)->active < timercnt--))
922	{	1482	{
923	timers [w->active - 1] = timers [timercnt];	1483	timers [((W)w)->active - 1] = timers [timercnt];
924	downheap ((WT *)timers, timercnt, w->active - 1);	1484	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
925	}	1485	}
926		1486
927	w->at = w->repeat;	1487	((WT)w)->at -= mn_now;
928		1488
929	ev_stop ((W)w);	1489	ev_stop (EV_A_ (W)w);
930	}	1490	}
931		1491
932	void	1492	void
933	ev_timer_again (struct ev_timer *w)	1493	ev_timer_again (EV_P_ ev_timer *w)
934	{	1494	{
935	if (ev_is_active (w))	1495	if (ev_is_active (w))
936	{	1496	{
937	if (w->repeat)	1497	if (w->repeat)
938	{	1498	{
939	w->at = now + w->repeat;	1499	((WT)w)->at = mn_now + w->repeat;
940	downheap ((WT *)timers, timercnt, w->active - 1);	1500	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
941	}	1501	}
942	else	1502	else
943	ev_timer_stop (w);	1503	ev_timer_stop (EV_A_ w);
944	}	1504	}
945	else if (w->repeat)	1505	else if (w->repeat)
		1506	{
		1507	w->at = w->repeat;
946	ev_timer_start (w);	1508	ev_timer_start (EV_A_ w);
		1509	}
947	}	1510	}
948		1511
		1512	#if EV_PERIODIC_ENABLE
949	void	1513	void
950	ev_periodic_start (struct ev_periodic *w)	1514	ev_periodic_start (EV_P_ ev_periodic *w)
951	{	1515	{
952	if (ev_is_active (w))	1516	if (expect_false (ev_is_active (w)))
953	return;	1517	return;
954		1518
		1519	if (w->reschedule_cb)
		1520	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1521	else if (w->interval)
		1522	{
955	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.));
956
957	/* 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 */
958	if (w->interval)
959	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	}
960		1527
961	ev_start ((W)w, ++periodiccnt);	1528	ev_start (EV_A_ (W)w, ++periodiccnt);
962	array_needsize (periodics, periodicmax, periodiccnt, );	1529	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
963	periodics [periodiccnt - 1] = w;	1530	periodics [periodiccnt - 1] = w;
964	upheap ((WT *)periodics, periodiccnt - 1);	1531	upheap ((WT *)periodics, periodiccnt - 1);
965	}
966		1532
		1533	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1534	}
		1535
967	void	1536	void
968	ev_periodic_stop (struct ev_periodic *w)	1537	ev_periodic_stop (EV_P_ ev_periodic *w)
969	{	1538	{
970	ev_clear_pending ((W)w);	1539	ev_clear_pending (EV_A_ (W)w);
971	if (!ev_is_active (w))	1540	if (expect_false (!ev_is_active (w)))
972	return;	1541	return;
973		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544
974	if (w->active < periodiccnt--)	1545	if (expect_true (((W)w)->active < periodiccnt--))
975	{	1546	{
976	periodics [w->active - 1] = periodics [periodiccnt];	1547	periodics [((W)w)->active - 1] = periodics [periodiccnt];
977	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1548	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
978	}	1549	}
979		1550
980	ev_stop ((W)w);	1551	ev_stop (EV_A_ (W)w);
981	}	1552	}
982		1553
983	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	void
		1564	ev_idle_start (EV_P_ ev_idle *w)
		1565	{
		1566	if (expect_false (ev_is_active (w)))
		1567	return;
		1568
		1569	ev_start (EV_A_ (W)w, ++idlecnt);
		1570	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1571	idles [idlecnt - 1] = w;
		1572	}
		1573
		1574	void
		1575	ev_idle_stop (EV_P_ ev_idle *w)
		1576	{
		1577	ev_clear_pending (EV_A_ (W)w);
		1578	if (expect_false (!ev_is_active (w)))
		1579	return;
		1580
		1581	{
		1582	int active = ((W)w)->active;
		1583	idles [active - 1] = idles [--idlecnt];
		1584	((W)idles [active - 1])->active = active;
		1585	}
		1586
		1587	ev_stop (EV_A_ (W)w);
		1588	}
		1589
		1590	void
		1591	ev_prepare_start (EV_P_ ev_prepare *w)
		1592	{
		1593	if (expect_false (ev_is_active (w)))
		1594	return;
		1595
		1596	ev_start (EV_A_ (W)w, ++preparecnt);
		1597	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1598	prepares [preparecnt - 1] = w;
		1599	}
		1600
		1601	void
		1602	ev_prepare_stop (EV_P_ ev_prepare *w)
		1603	{
		1604	ev_clear_pending (EV_A_ (W)w);
		1605	if (expect_false (!ev_is_active (w)))
		1606	return;
		1607
		1608	{
		1609	int active = ((W)w)->active;
		1610	prepares [active - 1] = prepares [--preparecnt];
		1611	((W)prepares [active - 1])->active = active;
		1612	}
		1613
		1614	ev_stop (EV_A_ (W)w);
		1615	}
		1616
		1617	void
		1618	ev_check_start (EV_P_ ev_check *w)
		1619	{
		1620	if (expect_false (ev_is_active (w)))
		1621	return;
		1622
		1623	ev_start (EV_A_ (W)w, ++checkcnt);
		1624	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1625	checks [checkcnt - 1] = w;
		1626	}
		1627
		1628	void
		1629	ev_check_stop (EV_P_ ev_check *w)
		1630	{
		1631	ev_clear_pending (EV_A_ (W)w);
		1632	if (expect_false (!ev_is_active (w)))
		1633	return;
		1634
		1635	{
		1636	int active = ((W)w)->active;
		1637	checks [active - 1] = checks [--checkcnt];
		1638	((W)checks [active - 1])->active = active;
		1639	}
		1640
		1641	ev_stop (EV_A_ (W)w);
		1642	}
		1643
		1644	#ifndef SA_RESTART
		1645	# define SA_RESTART 0
		1646	#endif
		1647
		1648	void
984	ev_signal_start (struct ev_signal *w)	1649	ev_signal_start (EV_P_ ev_signal *w)
985	{	1650	{
		1651	#if EV_MULTIPLICITY
		1652	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1653	#endif
986	if (ev_is_active (w))	1654	if (expect_false (ev_is_active (w)))
987	return;	1655	return;
988		1656
989	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1657	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
990		1658
991	ev_start ((W)w, 1);	1659	ev_start (EV_A_ (W)w, 1);
992	array_needsize (signals, signalmax, w->signum, signals_init);	1660	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
993	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1661	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
994		1662
995	if (!w->next)	1663	if (!((WL)w)->next)
996	{	1664	{
		1665	#if _WIN32
		1666	signal (w->signum, sighandler);
		1667	#else
997	struct sigaction sa;	1668	struct sigaction sa;
998	sa.sa_handler = sighandler;	1669	sa.sa_handler = sighandler;
999	sigfillset (&sa.sa_mask);	1670	sigfillset (&sa.sa_mask);
1000	sa.sa_flags = 0;	1671	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1001	sigaction (w->signum, &sa, 0);	1672	sigaction (w->signum, &sa, 0);
		1673	#endif
1002	}	1674	}
1003	}	1675	}
1004		1676
1005	void	1677	void
1006	ev_signal_stop (struct ev_signal *w)	1678	ev_signal_stop (EV_P_ ev_signal *w)
1007	{	1679	{
1008	ev_clear_pending ((W)w);	1680	ev_clear_pending (EV_A_ (W)w);
1009	if (!ev_is_active (w))	1681	if (expect_false (!ev_is_active (w)))
1010	return;	1682	return;
1011		1683
1012	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1684	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1013	ev_stop ((W)w);	1685	ev_stop (EV_A_ (W)w);
1014		1686
1015	if (!signals [w->signum - 1].head)	1687	if (!signals [w->signum - 1].head)
1016	signal (w->signum, SIG_DFL);	1688	signal (w->signum, SIG_DFL);
1017	}	1689	}
1018		1690
1019	void	1691	void
1020	ev_idle_start (struct ev_idle *w)
1021	{
1022	if (ev_is_active (w))
1023	return;
1024
1025	ev_start ((W)w, ++idlecnt);
1026	array_needsize (idles, idlemax, idlecnt, );
1027	idles [idlecnt - 1] = w;
1028	}
1029
1030	void
1031	ev_idle_stop (struct ev_idle *w)
1032	{
1033	ev_clear_pending ((W)w);
1034	if (ev_is_active (w))
1035	return;
1036
1037	idles [w->active - 1] = idles [--idlecnt];
1038	ev_stop ((W)w);
1039	}
1040
1041	void
1042	ev_prepare_start (struct ev_prepare *w)
1043	{
1044	if (ev_is_active (w))
1045	return;
1046
1047	ev_start ((W)w, ++preparecnt);
1048	array_needsize (prepares, preparemax, preparecnt, );
1049	prepares [preparecnt - 1] = w;
1050	}
1051
1052	void
1053	ev_prepare_stop (struct ev_prepare *w)
1054	{
1055	ev_clear_pending ((W)w);
1056	if (ev_is_active (w))
1057	return;
1058
1059	prepares [w->active - 1] = prepares [--preparecnt];
1060	ev_stop ((W)w);
1061	}
1062
1063	void
1064	ev_check_start (struct ev_check *w)
1065	{
1066	if (ev_is_active (w))
1067	return;
1068
1069	ev_start ((W)w, ++checkcnt);
1070	array_needsize (checks, checkmax, checkcnt, );
1071	checks [checkcnt - 1] = w;
1072	}
1073
1074	void
1075	ev_check_stop (struct ev_check *w)
1076	{
1077	ev_clear_pending ((W)w);
1078	if (ev_is_active (w))
1079	return;
1080
1081	checks [w->active - 1] = checks [--checkcnt];
1082	ev_stop ((W)w);
1083	}
1084
1085	void
1086	ev_child_start (struct ev_child *w)	1692	ev_child_start (EV_P_ ev_child *w)
1087	{	1693	{
		1694	#if EV_MULTIPLICITY
		1695	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1696	#endif
1088	if (ev_is_active (w))	1697	if (expect_false (ev_is_active (w)))
1089	return;	1698	return;
1090		1699
1091	ev_start ((W)w, 1);	1700	ev_start (EV_A_ (W)w, 1);
1092	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1701	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1093	}	1702	}
1094		1703
1095	void	1704	void
1096	ev_child_stop (struct ev_child *w)	1705	ev_child_stop (EV_P_ ev_child *w)
1097	{	1706	{
1098	ev_clear_pending ((W)w);	1707	ev_clear_pending (EV_A_ (W)w);
1099	if (ev_is_active (w))	1708	if (expect_false (!ev_is_active (w)))
1100	return;	1709	return;
1101		1710
1102	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1711	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1103	ev_stop ((W)w);	1712	ev_stop (EV_A_ (W)w);
1104	}	1713	}
		1714
		1715	#if EV_EMBED_ENABLE
		1716	void noinline
		1717	ev_embed_sweep (EV_P_ ev_embed *w)
		1718	{
		1719	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1720	}
		1721
		1722	static void
		1723	embed_cb (EV_P_ ev_io *io, int revents)
		1724	{
		1725	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		1726
		1727	if (ev_cb (w))
		1728	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1729	else
		1730	ev_embed_sweep (loop, w);
		1731	}
		1732
		1733	void
		1734	ev_embed_start (EV_P_ ev_embed *w)
		1735	{
		1736	if (expect_false (ev_is_active (w)))
		1737	return;
		1738
		1739	{
		1740	struct ev_loop *loop = w->loop;
		1741	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1742	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1743	}
		1744
		1745	ev_set_priority (&w->io, ev_priority (w));
		1746	ev_io_start (EV_A_ &w->io);
		1747
		1748	ev_start (EV_A_ (W)w, 1);
		1749	}
		1750
		1751	void
		1752	ev_embed_stop (EV_P_ ev_embed *w)
		1753	{
		1754	ev_clear_pending (EV_A_ (W)w);
		1755	if (expect_false (!ev_is_active (w)))
		1756	return;
		1757
		1758	ev_io_stop (EV_A_ &w->io);
		1759
		1760	ev_stop (EV_A_ (W)w);
		1761	}
		1762	#endif
		1763
		1764	#if EV_STAT_ENABLE
		1765
		1766	# ifdef _WIN32
		1767	# define lstat(a,b) stat(a,b)
		1768	# endif
		1769
		1770	#define DEF_STAT_INTERVAL 5.0074891
		1771	#define MIN_STAT_INTERVAL 0.1074891
		1772
		1773	void
		1774	ev_stat_stat (EV_P_ ev_stat *w)
		1775	{
		1776	if (lstat (w->path, &w->attr) < 0)
		1777	w->attr.st_nlink = 0;
		1778	else if (!w->attr.st_nlink)
		1779	w->attr.st_nlink = 1;
		1780	}
		1781
		1782	static void
		1783	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1784	{
		1785	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		1786
		1787	/* we copy this here each the time so that */
		1788	/* prev has the old value when the callback gets invoked */
		1789	w->prev = w->attr;
		1790	ev_stat_stat (EV_A_ w);
		1791
		1792	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1793	ev_feed_event (EV_A_ w, EV_STAT);
		1794	}
		1795
		1796	void
		1797	ev_stat_start (EV_P_ ev_stat *w)
		1798	{
		1799	if (expect_false (ev_is_active (w)))
		1800	return;
		1801
		1802	/* since we use memcmp, we need to clear any padding data etc. */
		1803	memset (&w->prev, 0, sizeof (ev_statdata));
		1804	memset (&w->attr, 0, sizeof (ev_statdata));
		1805
		1806	ev_stat_stat (EV_A_ w);
		1807
		1808	if (w->interval < MIN_STAT_INTERVAL)
		1809	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1810
		1811	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1812	ev_set_priority (&w->timer, ev_priority (w));
		1813	ev_timer_start (EV_A_ &w->timer);
		1814
		1815	ev_start (EV_A_ (W)w, 1);
		1816	}
		1817
		1818	void
		1819	ev_stat_stop (EV_P_ ev_stat *w)
		1820	{
		1821	ev_clear_pending (EV_A_ (W)w);
		1822	if (expect_false (!ev_is_active (w)))
		1823	return;
		1824
		1825	ev_timer_stop (EV_A_ &w->timer);
		1826
		1827	ev_stop (EV_A_ (W)w);
		1828	}
		1829	#endif
1105		1830
1106	/*****************************************************************************/	1831	/*****************************************************************************/
1107		1832
1108	struct ev_once	1833	struct ev_once
1109	{	1834	{
1110	struct ev_io io;	1835	ev_io io;
1111	struct ev_timer to;	1836	ev_timer to;
1112	void (cb)(int revents, void arg);	1837	void (cb)(int revents, void arg);
1113	void *arg;	1838	void *arg;
1114	};	1839	};
1115		1840
1116	static void	1841	static void
1117	once_cb (struct ev_once *once, int revents)	1842	once_cb (EV_P_ struct ev_once *once, int revents)
1118	{	1843	{
1119	void (cb)(int revents, void arg) = once->cb;	1844	void (cb)(int revents, void arg) = once->cb;
1120	void *arg = once->arg;	1845	void *arg = once->arg;
1121		1846
1122	ev_io_stop (&once->io);	1847	ev_io_stop (EV_A_ &once->io);
1123	ev_timer_stop (&once->to);	1848	ev_timer_stop (EV_A_ &once->to);
1124	free (once);	1849	ev_free (once);
1125		1850
1126	cb (revents, arg);	1851	cb (revents, arg);
1127	}	1852	}
1128		1853
1129	static void	1854	static void
1130	once_cb_io (struct ev_io *w, int revents)	1855	once_cb_io (EV_P_ ev_io *w, int revents)
1131	{	1856	{
1132	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1857	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1133	}	1858	}
1134		1859
1135	static void	1860	static void
1136	once_cb_to (struct ev_timer *w, int revents)	1861	once_cb_to (EV_P_ ev_timer *w, int revents)
1137	{	1862	{
1138	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1863	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1139	}	1864	}
1140		1865
1141	void	1866	void
1142	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1867	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1143	{	1868	{
1144	struct ev_once *once = malloc (sizeof (struct ev_once));	1869	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1145		1870
1146	if (!once)	1871	if (expect_false (!once))
		1872	{
1147	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1873	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1148	else	1874	return;
1149	{	1875	}
		1876
1150	once->cb = cb;	1877	once->cb = cb;
1151	once->arg = arg;	1878	once->arg = arg;
1152		1879
1153	ev_watcher_init (&once->io, once_cb_io);	1880	ev_init (&once->io, once_cb_io);
1154	if (fd >= 0)	1881	if (fd >= 0)
1155	{	1882	{
1156	ev_io_set (&once->io, fd, events);	1883	ev_io_set (&once->io, fd, events);
1157	ev_io_start (&once->io);	1884	ev_io_start (EV_A_ &once->io);
1158	}	1885	}
1159		1886
1160	ev_watcher_init (&once->to, once_cb_to);	1887	ev_init (&once->to, once_cb_to);
1161	if (timeout >= 0.)	1888	if (timeout >= 0.)
1162	{	1889	{
1163	ev_timer_set (&once->to, timeout, 0.);	1890	ev_timer_set (&once->to, timeout, 0.);
1164	ev_timer_start (&once->to);	1891	ev_timer_start (EV_A_ &once->to);
1165	}
1166	}
1167	}
1168
1169	/*****************************************************************************/
1170
1171	#if 0
1172
1173	struct ev_io wio;
1174
1175	static void
1176	sin_cb (struct ev_io *w, int revents)
1177	{
1178	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1179	}
1180
1181	static void
1182	ocb (struct ev_timer *w, int revents)
1183	{
1184	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1185	ev_timer_stop (w);
1186	ev_timer_start (w);
1187	}
1188
1189	static void
1190	scb (struct ev_signal *w, int revents)
1191	{
1192	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1193	ev_io_stop (&wio);
1194	ev_io_start (&wio);
1195	}
1196
1197	static void
1198	gcb (struct ev_signal *w, int revents)
1199	{
1200	fprintf (stderr, "generic %x\n", revents);
1201
1202	}
1203
1204	int main (void)
1205	{
1206	ev_init (0);
1207
1208	ev_io_init (&wio, sin_cb, 0, EV_READ);
1209	ev_io_start (&wio);
1210
1211	struct ev_timer t[10000];
1212
1213	#if 0
1214	int i;
1215	for (i = 0; i < 10000; ++i)
1216	{	1892	}
1217	struct ev_timer *w = t + i;
1218	ev_watcher_init (w, ocb, i);
1219	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1220	ev_timer_start (w);
1221	if (drand48 () < 0.5)
1222	ev_timer_stop (w);
1223	}
1224	#endif
1225
1226	struct ev_timer t1;
1227	ev_timer_init (&t1, ocb, 5, 10);
1228	ev_timer_start (&t1);
1229
1230	struct ev_signal sig;
1231	ev_signal_init (&sig, scb, SIGQUIT);
1232	ev_signal_start (&sig);
1233
1234	struct ev_check cw;
1235	ev_check_init (&cw, gcb);
1236	ev_check_start (&cw);
1237
1238	struct ev_idle iw;
1239	ev_idle_init (&iw, gcb);
1240	ev_idle_start (&iw);
1241
1242	ev_loop (0);
1243
1244	return 0;
1245	}	1893	}
1246		1894
		1895	#ifdef __cplusplus
		1896	}
1247	#endif	1897	#endif
1248		1898
1249
1250
1251

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Comparing libev/ev.c (file contents): Revision 1.41 by root, Fri Nov 2 16:54:34 2007 UTC vs. Revision 1.143 by root, Tue Nov 27 07:27:10 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.41 by root, Fri Nov 2 16:54:34 2007 UTC vs.
Revision 1.143 by root, Tue Nov 27 07:27:10 2007 UTC