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/**********************************************************************
*
* Copyright (C) Imagination Technologies Ltd. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful but, except
* as otherwise stated in writing, without any warranty; without even the
* implied warranty of merchantability or fitness for a particular purpose.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Contact Information:
* Imagination Technologies Ltd. <gpl-support@imgtec.com>
* Home Park Estate, Kings Langley, Herts, WD4 8LZ, UK
*
******************************************************************************/
#ifndef __INCLUDED_LINUX_MUTEX_H_
#define __INCLUDED_LINUX_MUTEX_H_
#include <linux/version.h>
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
#include <linux/mutex.h>
#else
#include <asm/semaphore.h>
#endif
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))
typedef struct mutex PVRSRV_LINUX_MUTEX;
#else
typedef struct {
struct semaphore sSemaphore;
atomic_t Count;
}PVRSRV_LINUX_MUTEX;
#endif
static inline IMG_VOID LinuxInitMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex) {
mutex_init(psPVRSRVMutex);
}
static inline IMG_VOID LinuxLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex) {
mutex_lock(psPVRSRVMutex);
}
static inline PVRSRV_ERROR LinuxLockMutexInterruptible(PVRSRV_LINUX_MUTEX *psPVRSRVMutex) {
if(mutex_lock_interruptible(psPVRSRVMutex) == -EINTR) {
return PVRSRV_ERROR_MUTEX_INTERRUPTIBLE_ERROR;
} else {
return PVRSRV_OK;
}
}
static inline IMG_INT32 LinuxTryLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex) {
return mutex_trylock(psPVRSRVMutex);
}
static inline IMG_VOID LinuxUnLockMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex) {
mutex_unlock(psPVRSRVMutex);
}
static inline IMG_BOOL LinuxIsLockedMutex(PVRSRV_LINUX_MUTEX *psPVRSRVMutex) {
return (mutex_is_locked(psPVRSRVMutex)) ? IMG_TRUE : IMG_FALSE;
}
#endif
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