spinlock.h

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00001 /*****************************************************************************************
00002  Copyright (c) 2002 The UbixOS Project
00003  All rights reserved.
00004 
00005 Redistribution and use in source and binary forms, with or without modification, are
00006 permitted provided that the following conditions are met:
00007 
00008 Redistributions of source code must retain the above copyright notice, this list of
00009 conditions, the following disclaimer and the list of authors.  Redistributions in binary
00010 form must reproduce the above copyright notice, this list of conditions, the following
00011 disclaimer and the list of authors in the documentation and/or other materials provided
00012 with the distribution. Neither the name of the UbixOS Project nor the names of its
00013 contributors may be used to endorse or promote products derived from this software
00014 without specific prior written permission.
00015 
00016 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
00017 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
00018 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
00019 THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00020 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
00021 OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00022 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
00023 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00024 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00025 
00026  $Id$
00027 
00028 *****************************************************************************************/
00029 
00030 #ifndef _SPINLOCK_H
00031 #define _SPINLOCK_H
00032 
00033 #include <ubixos/types.h>
00034 
00035 #define SPIN_LOCK_INITIALIZER   0
00036 
00037 typedef volatile int spinLock_t;
00038 
00039 extern inline void spinLockInit(spinLock_t *);
00040 extern inline void spinUnlock(spinLock_t *);
00041 extern inline int spinTryLock(spinLock_t *);
00042 extern inline void spinLock(spinLock_t *);
00043 extern inline int spinLockLocked(spinLock_t *);
00044 
00045 #endif
00046 
00047 /***
00048  END
00049  ***/
00050 

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