]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | #ifndef __XFS_SUPPORT_SV_H__ | |
33 | #define __XFS_SUPPORT_SV_H__ | |
34 | ||
35 | #include <linux/wait.h> | |
36 | #include <linux/sched.h> | |
37 | #include <linux/spinlock.h> | |
38 | ||
39 | /* | |
40 | * Synchronisation variables. | |
41 | * | |
42 | * (Parameters "pri", "svf" and "rts" are not implemented) | |
43 | */ | |
44 | ||
45 | typedef struct sv_s { | |
46 | wait_queue_head_t waiters; | |
47 | } sv_t; | |
48 | ||
49 | #define SV_FIFO 0x0 /* sv_t is FIFO type */ | |
50 | #define SV_LIFO 0x2 /* sv_t is LIFO type */ | |
51 | #define SV_PRIO 0x4 /* sv_t is PRIO type */ | |
52 | #define SV_KEYED 0x6 /* sv_t is KEYED type */ | |
53 | #define SV_DEFAULT SV_FIFO | |
54 | ||
55 | ||
56 | static inline void _sv_wait(sv_t *sv, spinlock_t *lock, int state, | |
57 | unsigned long timeout) | |
58 | { | |
59 | DECLARE_WAITQUEUE(wait, current); | |
60 | ||
61 | add_wait_queue_exclusive(&sv->waiters, &wait); | |
62 | __set_current_state(state); | |
63 | spin_unlock(lock); | |
64 | ||
65 | schedule_timeout(timeout); | |
66 | ||
67 | remove_wait_queue(&sv->waiters, &wait); | |
68 | } | |
69 | ||
70 | #define init_sv(sv,type,name,flag) \ | |
71 | init_waitqueue_head(&(sv)->waiters) | |
72 | #define sv_init(sv,flag,name) \ | |
73 | init_waitqueue_head(&(sv)->waiters) | |
74 | #define sv_destroy(sv) \ | |
75 | /*NOTHING*/ | |
76 | #define sv_wait(sv, pri, lock, s) \ | |
77 | _sv_wait(sv, lock, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT) | |
78 | #define sv_wait_sig(sv, pri, lock, s) \ | |
79 | _sv_wait(sv, lock, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT) | |
80 | #define sv_timedwait(sv, pri, lock, s, svf, ts, rts) \ | |
81 | _sv_wait(sv, lock, TASK_UNINTERRUPTIBLE, timespec_to_jiffies(ts)) | |
82 | #define sv_timedwait_sig(sv, pri, lock, s, svf, ts, rts) \ | |
83 | _sv_wait(sv, lock, TASK_INTERRUPTIBLE, timespec_to_jiffies(ts)) | |
84 | #define sv_signal(sv) \ | |
85 | wake_up(&(sv)->waiters) | |
86 | #define sv_broadcast(sv) \ | |
87 | wake_up_all(&(sv)->waiters) | |
88 | ||
89 | #endif /* __XFS_SUPPORT_SV_H__ */ |