1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* Further, this software is distributed without any warranty that it is
|
|
* free of the rightful claim of any third person regarding infringement
|
|
* or the like. Any license provided herein, whether implied or
|
|
* otherwise, applies only to this software file. Patent licenses, if
|
|
* any, provided herein do not apply to combinations of this program with
|
|
* other software, or any other product whatsoever.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write the Free Software Foundation, Inc., 59
|
|
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
|
*
|
|
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
|
|
* Mountain View, CA 94043, or:
|
|
*
|
|
* http://www.sgi.com
|
|
*
|
|
* For further information regarding this notice, see:
|
|
*
|
|
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
|
|
*/
|
|
#ifndef __XFS_SUPPORT_SEMA_H__
|
|
#define __XFS_SUPPORT_SEMA_H__
|
|
|
|
#include <linux/time.h>
|
|
#include <linux/wait.h>
|
|
#include <asm/atomic.h>
|
|
#include <asm/semaphore.h>
|
|
|
|
/*
|
|
* sema_t structure just maps to struct semaphore in Linux kernel.
|
|
*/
|
|
|
|
typedef struct semaphore sema_t;
|
|
|
|
#define init_sema(sp, val, c, d) sema_init(sp, val)
|
|
#define initsema(sp, val) sema_init(sp, val)
|
|
#define initnsema(sp, val, name) sema_init(sp, val)
|
|
#define psema(sp, b) down(sp)
|
|
#define vsema(sp) up(sp)
|
|
#define valusema(sp) (atomic_read(&(sp)->count))
|
|
#define freesema(sema)
|
|
|
|
/*
|
|
* Map cpsema (try to get the sema) to down_trylock. We need to switch
|
|
* the return values since cpsema returns 1 (acquired) 0 (failed) and
|
|
* down_trylock returns the reverse 0 (acquired) 1 (failed).
|
|
*/
|
|
|
|
#define cpsema(sp) (down_trylock(sp) ? 0 : 1)
|
|
|
|
/*
|
|
* Didn't do cvsema(sp). Not sure how to map this to up/down/...
|
|
* It does a vsema if the values is < 0 other wise nothing.
|
|
*/
|
|
|
|
#endif /* __XFS_SUPPORT_SEMA_H__ */
|