Add new API GetTimeInNanoSecond() to TimerLib to convert elapsed ticks to time in unit of nanoseconds.

Signed-off-by: xdu2
Reviewed-by: mdkinney

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12206 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 22 insertions, 1 deletions

diff --git a/MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c b/MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c
index 0c79b21f6f..d06cd0f399 100644
--- a/MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c
+++ b/MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c
@@ -1,7 +1,7 @@
 /** @file

   A non-functional instance of the Timer Library.

 

-  Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2007 - 2011, Intel Corporation. All rights reserved.<BR>

   This program and the accompanying materials

   are licensed and made available under the terms and conditions of the BSD License

   which accompanies this distribution.  The full text of the license may be found at

@@ -111,3 +111,24 @@ GetPerformanceCounterProperties (
 

   return (UINT64)(-1);

 }

+

+/**

+  Converts elapsed ticks of performance counter to time in nanoseconds.

+

+  This function converts the elapsed ticks of running performance counter to

+  time value in unit of nanoseconds.

+

+  @param  Ticks     The number of elapsed ticks of running performance counter.

+

+  @return The elapsed time in nanoseconds.

+

+**/

+UINT64

+EFIAPI

+GetTimeInNanoSecond (

+  IN      UINT64                     Ticks

+  )

+{

+  ASSERT (FALSE);

+  return 0;

+}