projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 7b718769 NS |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. | |
| 1da177e4 | 4 | * |
| 7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as | |
| 1da177e4 LT |
7 | * published by the Free Software Foundation. |
| 8 | * | |
| 7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 1da177e4 | 13 | * |
| 7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, | |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 1da177e4 LT |
17 | */ |
| 18 | #ifndef __XFS_SUPPORT_SV_H__ | |
| 19 | #define __XFS_SUPPORT_SV_H__ | |
| 20 | ||
| 21 | #include <linux/wait.h> | |
| 22 | #include <linux/sched.h> | |
| 23 | #include <linux/spinlock.h> | |
| 24 | ||
| 25 | /* | |
| 26 | * Synchronisation variables. | |
| 27 | * | |
| 28 | * (Parameters "pri", "svf" and "rts" are not implemented) | |
| 29 | */ | |
| 30 | ||
| 31 | typedef struct sv_s { | |
| 32 | wait_queue_head_t waiters; | |
| 33 | } sv_t; | |
| 34 | ||
| 63ad2a5c | 35 | static inline void _sv_wait(sv_t *sv, spinlock_t *lock) |
| 1da177e4 LT |
36 | { |
| 37 | DECLARE_WAITQUEUE(wait, current); | |
| 38 | ||
| 39 | add_wait_queue_exclusive(&sv->waiters, &wait); | |
| 63ad2a5c | 40 | __set_current_state(TASK_UNINTERRUPTIBLE); |
| 1da177e4 LT |
41 | spin_unlock(lock); |
| 42 | ||
| 63ad2a5c | 43 | schedule(); |
| 1da177e4 LT |
44 | |
| 45 | remove_wait_queue(&sv->waiters, &wait); | |
| 46 | } | |
| 47 | ||
| 1da177e4 LT |
48 | #define sv_init(sv,flag,name) \ |
| 49 | init_waitqueue_head(&(sv)->waiters) | |
| 50 | #define sv_destroy(sv) \ | |
| 51 | /*NOTHING*/ | |
| 52 | #define sv_wait(sv, pri, lock, s) \ | |
| 63ad2a5c | 53 | _sv_wait(sv, lock) |
| 1da177e4 LT |
54 | #define sv_signal(sv) \ |
| 55 | wake_up(&(sv)->waiters) | |
| 56 | #define sv_broadcast(sv) \ | |
| 57 | wake_up_all(&(sv)->waiters) | |
| 58 | ||
| 59 | #endif /* __XFS_SUPPORT_SV_H__ */ |