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[mirror_edk2.git] / MdeModulePkg / Core / Dxe / Library.h

/** @file\r
  Internal functions shared in DxeCore module.\r
\r
Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
All rights reserved. This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#ifndef _DXE_LIBRARY_H_\r
#define _DXE_LIBRARY_H_\r
\r
\r
/**\r
  Raising to the task priority level of the mutual exclusion\r
  lock, and then acquires ownership of the lock.\r
\r
  @param  Lock               The lock to acquire\r
\r
  @return Lock owned\r
\r
**/\r
VOID\r
CoreAcquireLock (\r
  IN EFI_LOCK  *Lock\r
  );\r
\r
\r
/**\r
  Initialize a basic mutual exclusion lock.   Each lock\r
  provides mutual exclusion access at it's task priority\r
  level.  Since there is no-premption (at any TPL) or\r
  multiprocessor support, acquiring the lock only consists\r
  of raising to the locks TPL.\r
\r
  @param  Lock               The EFI_LOCK structure to initialize\r
\r
  @retval EFI_SUCCESS        Lock Owned.\r
  @retval EFI_ACCESS_DENIED  Reentrant Lock Acquisition, Lock not Owned.\r
\r
**/\r
EFI_STATUS\r
CoreAcquireLockOrFail (\r
  IN EFI_LOCK  *Lock\r
  );\r
\r
\r
/**\r
  Releases ownership of the mutual exclusion lock, and\r
  restores the previous task priority level.\r
\r
  @param  Lock               The lock to release\r
\r
  @return Lock unowned\r
\r
**/\r
VOID\r
CoreReleaseLock (\r
  IN EFI_LOCK  *Lock\r
  );\r
\r
\r
#endif\r