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98 lines
3.9 KiB
C
98 lines
3.9 KiB
C
/*************************************************************************/ /*!
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@File lock.h
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@Title Locking interface
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@Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved
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@Description Services internal locking interface
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@License Dual MIT/GPLv2
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The contents of this file are subject to the MIT license as set out below.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 2 ("GPL") in which case the provisions
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of GPL are applicable instead of those above.
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If you wish to allow use of your version of this file only under the terms of
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GPL, and not to allow others to use your version of this file under the terms
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of the MIT license, indicate your decision by deleting the provisions above
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and replace them with the notice and other provisions required by GPL as set
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out in the file called "GPL-COPYING" included in this distribution. If you do
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not delete the provisions above, a recipient may use your version of this file
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under the terms of either the MIT license or GPL.
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This License is also included in this distribution in the file called
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"MIT-COPYING".
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EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
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PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/ /**************************************************************************/
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#ifndef _LOCK_H_
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#define _LOCK_H_
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/* In Linux kernel mode we are using the kernel mutex implementation directly
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* with macros. This allows us to use the kernel lockdep feature for lock
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* debugging. */
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#include "lock_types.h"
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#if defined(LINUX) && defined(__KERNEL__)
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#define OSLockCreate(phLock, eLockType) ({ \
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PVRSRV_ERROR e = PVRSRV_ERROR_OUT_OF_MEMORY; \
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*(phLock) = kmalloc(sizeof(struct mutex), GFP_KERNEL); \
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if (*(phLock)) { mutex_init(*(phLock)); e = PVRSRV_OK; }; \
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e;})
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#define OSLockDestroy(hLock) ({mutex_destroy((hLock)); kfree((hLock)); PVRSRV_OK;})
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#define OSLockAcquire(hLock) ({mutex_lock((hLock)); PVRSRV_OK;})
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#define OSLockAcquireNested(hLock, subclass) ({mutex_lock_nested((hLock), (subclass)); PVRSRV_OK;})
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#define OSLockRelease(hLock) ({mutex_unlock((hLock)); PVRSRV_OK;})
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#define OSLockIsLocked(hLock) ({IMG_BOOL b = ((mutex_is_locked((hLock)) == 1) ? IMG_TRUE : IMG_FALSE); b;})
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#define OSTryLockAcquire(hLock) ({IMG_BOOL b = ((mutex_trylock(hLock) == 1) ? IMG_TRUE : IMG_FALSE); b;})
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#else /* defined(LINUX) && defined(__KERNEL__) */
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#include "img_types.h"
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#include "pvrsrv_error.h"
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IMG_INTERNAL
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PVRSRV_ERROR OSLockCreate(POS_LOCK *phLock, LOCK_TYPE eLockType);
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IMG_INTERNAL
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IMG_VOID OSLockDestroy(POS_LOCK hLock);
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IMG_INTERNAL
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IMG_VOID OSLockAcquire(POS_LOCK hLock);
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/* Nested notation isn't used in UM or other OS's */
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#define OSLockAcquireNested(hLock, subclass) OSLockAcquire((hLock))
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IMG_INTERNAL
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IMG_VOID OSLockRelease(POS_LOCK hLock);
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IMG_INTERNAL
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IMG_BOOL OSLockIsLocked(POS_LOCK hLock);
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#endif /* defined(LINUX) && defined(__KERNEL__) */
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#endif /* _LOCK_H_ */
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