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

Comparing libev/ev.c (file contents):
Revision 1.272 by root, Mon Nov 3 12:17:40 2008 UTC vs.
Revision 1.274 by root, Thu Nov 20 00:35:10 2008 UTC

…		…
47	# include EV_CONFIG_H	47	# include EV_CONFIG_H
48	# else	48	# else
49	# include "config.h"	49	# include "config.h"
50	# endif	50	# endif
51		51
		52	# if HAVE_CLOCK_SYSCALL
		53	# ifndef EV_USE_CLOCK_SYSCALL
		54	# define EV_USE_CLOCK_SYSCALL 1
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 0
		57	# endif
		58	# ifndef EV_USE_MONOTONIC
		59	# define EV_USE_MONOTONIC 1
		60	# endif
		61	# endif
		62	# endif
		63
52	# if HAVE_CLOCK_GETTIME	64	# if HAVE_CLOCK_GETTIME
53	# ifndef EV_USE_MONOTONIC	65	# ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	66	# define EV_USE_MONOTONIC 1
55	# endif	67	# endif
56	# ifndef EV_USE_REALTIME	68	# ifndef EV_USE_REALTIME
…		…
164	# endif	176	# endif
165	#endif	177	#endif
166		178
167	/* this block tries to deduce configuration from header-defined symbols and defaults */	179	/* this block tries to deduce configuration from header-defined symbols and defaults */
168		180
		181	#ifndef EV_USE_CLOCK_SYSCALL
		182	# if __linux && __GLIBC__ >= 2
		183	# define EV_USE_CLOCK_SYSCALL 1
		184	# else
		185	# define EV_USE_CLOCK_SYSCALL 0
		186	# endif
		187	#endif
		188
169	#ifndef EV_USE_MONOTONIC	189	#ifndef EV_USE_MONOTONIC
170	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0	190	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171	# define EV_USE_MONOTONIC 1	191	# define EV_USE_MONOTONIC 1
172	# else	192	# else
173	# define EV_USE_MONOTONIC 0	193	# define EV_USE_MONOTONIC 0
…		…
287	# endif	307	# endif
288	#endif	308	#endif
289		309
290	#if EV_USE_INOTIFY	310	#if EV_USE_INOTIFY
291	# include <sys/utsname.h>	311	# include <sys/utsname.h>
		312	# include <sys/statfs.h>
292	# include <sys/inotify.h>	313	# include <sys/inotify.h>
293	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	314	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294	# ifndef IN_DONT_FOLLOW	315	# ifndef IN_DONT_FOLLOW
295	# undef EV_USE_INOTIFY	316	# undef EV_USE_INOTIFY
296	# define EV_USE_INOTIFY 0	317	# define EV_USE_INOTIFY 0
297	# endif	318	# endif
298	#endif	319	#endif
299		320
300	#if EV_SELECT_IS_WINSOCKET	321	#if EV_SELECT_IS_WINSOCKET
301	# include <winsock.h>	322	# include <winsock.h>
		323	#endif
		324
		325	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		326	/* which makes programs even slower. might work on other unices, too. */
		327	#if EV_USE_CLOCK_SYSCALL
		328	# include <syscall.h>
		329	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		330	# undef EV_USE_MONOTONIC
		331	# define EV_USE_MONOTONIC 1
302	#endif	332	#endif
303		333
304	#if EV_USE_EVENTFD	334	#if EV_USE_EVENTFD
305	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	335	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306	# include <stdint.h>	336	# include <stdint.h>
…		…
2414	# ifdef _WIN32	2444	# ifdef _WIN32
2415	# undef lstat	2445	# undef lstat
2416	# define lstat(a,b) _stati64 (a,b)	2446	# define lstat(a,b) _stati64 (a,b)
2417	# endif	2447	# endif
2418		2448
2419	#define DEF_STAT_INTERVAL 5.0074891	2449	#define DEF_STAT_INTERVAL 5.0074891
		2450	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2420	#define MIN_STAT_INTERVAL 0.1074891	2451	#define MIN_STAT_INTERVAL 0.1074891
2421		2452
2422	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2453	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2423		2454
2424	#if EV_USE_INOTIFY	2455	#if EV_USE_INOTIFY
2425	# define EV_INOTIFY_BUFSIZE 8192	2456	# define EV_INOTIFY_BUFSIZE 8192
…		…
2429	{	2460	{
2430	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB \| IN_DELETE_SELF \| IN_MOVE_SELF \| IN_MODIFY \| IN_DONT_FOLLOW \| IN_MASK_ADD);	2461	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB \| IN_DELETE_SELF \| IN_MOVE_SELF \| IN_MODIFY \| IN_DONT_FOLLOW \| IN_MASK_ADD);
2431		2462
2432	if (w->wd < 0)	2463	if (w->wd < 0)
2433	{	2464	{
		2465	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2434	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2466	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2435		2467
2436	/* monitor some parent directory for speedup hints */	2468	/* monitor some parent directory for speedup hints */
2437	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2469	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2438	/* but an efficiency issue only */	2470	/* but an efficiency issue only */
2439	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2471	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
…		…
2456	}	2488	}
2457	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	2489	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2458	}	2490	}
2459	}	2491	}
2460	else	2492	else
2461	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */	2493	{
2462
2463	if (w->wd >= 0)
2464	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2494	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2495
		2496	/* now local changes will be tracked by inotify, but remote changes won't */
		2497	/* unless the filesystem it known to be local, we therefore still poll */
		2498	/* also do poll on <2.6.25, but with normal frequency */
		2499	struct statfs sfs;
		2500
		2501	if (fs_2625 && !statfs (w->path, &sfs))
		2502	if (sfs.f_type == 0x1373 /* devfs */
		2503	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
		2504	\|\| sfs.f_type == 0x3153464a /* jfs */
		2505	\|\| sfs.f_type == 0x52654973 /* reiser3 */
		2506	\|\| sfs.f_type == 0x01021994 /* tempfs */
		2507	\|\| sfs.f_type == 0x58465342 /* xfs */)
		2508	return;
		2509
		2510	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2511	ev_timer_again (EV_A_ &w->timer);
		2512	}
2465	}	2513	}
2466		2514
2467	static void noinline	2515	static void noinline
2468	infy_del (EV_P_ ev_stat *w)	2516	infy_del (EV_P_ ev_stat *w)
2469	{	2517	{
…		…
2522	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2570	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2523	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2571	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2524	}	2572	}
2525		2573
2526	void inline_size	2574	void inline_size
2527	infy_init (EV_P)	2575	check_2625 (EV_P)
2528	{	2576	{
2529	if (fs_fd != -2)
2530	return;
2531
2532	/* kernels < 2.6.25 are borked	2577	/* kernels < 2.6.25 are borked
2533	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2578	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2534	*/	2579	*/
2535	{
2536	struct utsname buf;	2580	struct utsname buf;
2537	int major, minor, micro;	2581	int major, minor, micro;
2538		2582
2539	fs_fd = -1;
2540
2541	if (uname (&buf))	2583	if (uname (&buf))
2542	return;	2584	return;
2543		2585
2544	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2586	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2545	return;	2587	return;
2546		2588
2547	if (major < 2	2589	if (major < 2
2548	\|\| (major == 2 && minor < 6)	2590	\|\| (major == 2 && minor < 6)
2549	\|\| (major == 2 && minor == 6 && micro < 25))	2591	\|\| (major == 2 && minor == 6 && micro < 25))
2550	return;	2592	return;
2551	}	2593
		2594	fs_2625 = 1;
		2595	}
		2596
		2597	void inline_size
		2598	infy_init (EV_P)
		2599	{
		2600	if (fs_fd != -2)
		2601	return;
		2602
		2603	fs_fd = -1;
		2604
		2605	check_2625 (EV_A);
2552		2606
2553	fs_fd = inotify_init ();	2607	fs_fd = inotify_init ();
2554		2608
2555	if (fs_fd >= 0)	2609	if (fs_fd >= 0)
2556	{	2610	{
…		…
2584	w->wd = -1;	2638	w->wd = -1;
2585		2639
2586	if (fs_fd >= 0)	2640	if (fs_fd >= 0)
2587	infy_add (EV_A_ w); /* re-add, no matter what */	2641	infy_add (EV_A_ w); /* re-add, no matter what */
2588	else	2642	else
2589	ev_timer_start (EV_A_ &w->timer);	2643	ev_timer_again (EV_A_ &w->timer);
2590	}	2644	}
2591	}	2645	}
2592	}	2646	}
2593		2647
2594	#endif	2648	#endif
…		…
2649	ev_stat_start (EV_P_ ev_stat *w)	2703	ev_stat_start (EV_P_ ev_stat *w)
2650	{	2704	{
2651	if (expect_false (ev_is_active (w)))	2705	if (expect_false (ev_is_active (w)))
2652	return;	2706	return;
2653		2707
2654	/* since we use memcmp, we need to clear any padding data etc. */
2655	memset (&w->prev, 0, sizeof (ev_statdata));
2656	memset (&w->attr, 0, sizeof (ev_statdata));
2657
2658	ev_stat_stat (EV_A_ w);	2708	ev_stat_stat (EV_A_ w);
2659		2709
		2710	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2660	if (w->interval < MIN_STAT_INTERVAL)	2711	w->interval = MIN_STAT_INTERVAL;
2661	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2662		2712
2663	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2713	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2664	ev_set_priority (&w->timer, ev_priority (w));	2714	ev_set_priority (&w->timer, ev_priority (w));
2665		2715
2666	#if EV_USE_INOTIFY	2716	#if EV_USE_INOTIFY
2667	infy_init (EV_A);	2717	infy_init (EV_A);
2668		2718
2669	if (fs_fd >= 0)	2719	if (fs_fd >= 0)
2670	infy_add (EV_A_ w);	2720	infy_add (EV_A_ w);
2671	else	2721	else
2672	#endif	2722	#endif
2673	ev_timer_start (EV_A_ &w->timer);	2723	ev_timer_again (EV_A_ &w->timer);
2674		2724
2675	ev_start (EV_A_ (W)w, 1);	2725	ev_start (EV_A_ (W)w, 1);
2676		2726
2677	EV_FREQUENT_CHECK;	2727	EV_FREQUENT_CHECK;
2678	}	2728	}

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Comparing libev/ev.c (file contents): Revision 1.272 by root, Mon Nov 3 12:17:40 2008 UTC vs. Revision 1.274 by root, Thu Nov 20 00:35:10 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.272 by root, Mon Nov 3 12:17:40 2008 UTC vs.
Revision 1.274 by root, Thu Nov 20 00:35:10 2008 UTC