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107 lines
1.6 KiB
107 lines
1.6 KiB
/*++
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Copyright (c) 1998 Intel Corporation
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Module Name:
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lock.c
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Abstract:
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Implements FLOCK
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Revision History
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--*/
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#include "lib.h"
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VOID
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InitializeLock (
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IN OUT FLOCK *Lock,
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IN EFI_TPL Priority
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)
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/*++
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Routine Description:
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Initialize a basic mutual exclusion lock. Each lock
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provides mutual exclusion access at it's task priority
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level. Since there is no-premption (at any TPL) or
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multiprocessor support, acquiring the lock only consists
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of raising to the locks TPL.
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Note on a debug build the lock is acquired and released
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to help ensure proper usage.
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Arguments:
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Lock - The FLOCK structure to initialize
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Priority - The task priority level of the lock
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Returns:
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An initialized F Lock structure.
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--*/
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{
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Lock->Tpl = Priority;
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Lock->OwnerTpl = 0;
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Lock->Lock = 0;
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}
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VOID
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AcquireLock (
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IN FLOCK *Lock
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)
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/*++
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Routine Description:
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Raising to the task priority level of the mutual exclusion
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lock, and then acquires ownership of the lock.
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Arguments:
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Lock - The lock to acquire
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Returns:
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Lock owned
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--*/
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{
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RtAcquireLock (Lock);
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}
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VOID
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ReleaseLock (
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IN FLOCK *Lock
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)
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/*++
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Routine Description:
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Releases ownership of the mutual exclusion lock, and
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restores the previous task priority level.
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Arguments:
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Lock - The lock to release
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Returns:
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Lock unowned
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--*/
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{
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RtReleaseLock (Lock);
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}
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