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| author | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-10-06 23:23:49 +0000 |
|---|---|---|
| committer | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-10-06 23:23:49 +0000 |
| commit | 631f060bb7fb457ff8720a690f4bdd378328cb2d (patch) | |
| tree | 446b2d8859af0a266b57234778d06fde6b758d31 /MdePkg/Library/BaseMemoryLibOptDxe/CopyMemWrapper.c | |
| parent | 7b3b4b2992bf89ee5f1aa3df2e2af9c988c49e69 (diff) | |
| download | edk2-platforms-631f060bb7fb457ff8720a690f4bdd378328cb2d.tar.xz | |
Add BaseMemoryLib optimized for DXE
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4036 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibOptDxe/CopyMemWrapper.c')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibOptDxe/CopyMemWrapper.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibOptDxe/CopyMemWrapper.c b/MdePkg/Library/BaseMemoryLibOptDxe/CopyMemWrapper.c new file mode 100644 index 0000000000..f957c8c850 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibOptDxe/CopyMemWrapper.c @@ -0,0 +1,65 @@ +/** @file
+ CopyMem() implementation.
+
+ Copyright (c) 2006, Intel Corporation<BR>
+ All rights reserved. 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
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ The following BaseMemoryLib instances share the same version of this file:
+
+ BaseMemoryLib
+ BaseMemoryLibMmx
+ BaseMemoryLibSse2
+ BaseMemoryLibRepStr
+ PeiMemoryLib
+ DxeMemoryLib
+
+**/
+
+//
+// Include common header file for this module.
+//
+
+
+#include "MemLibInternals.h"
+
+/**
+ Copies a source buffer to a destination buffer, and returns the destination buffer.
+
+ This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns
+ DestinationBuffer. The implementation must be reentrant, and it must handle the case
+ where SourceBuffer overlaps DestinationBuffer.
+ If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT().
+ If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
+
+ @param DestinationBuffer Pointer to the destination buffer of the memory copy.
+ @param SourceBuffer Pointer to the source buffer of the memory copy.
+ @param Length Number of bytes to copy from SourceBuffer to DestinationBuffer.
+
+ @return DestinationBuffer.
+
+**/
+VOID *
+EFIAPI
+CopyMem (
+ OUT VOID *DestinationBuffer,
+ IN CONST VOID *SourceBuffer,
+ IN UINTN Length
+ )
+{
+ if (Length == 0) {
+ return DestinationBuffer;
+ }
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));
+
+ if (DestinationBuffer == SourceBuffer) {
+ return DestinationBuffer;
+ }
+ return InternalMemCopyMem (DestinationBuffer, SourceBuffer, Length);
+}
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