1 files changed, 145 insertions, 0 deletions
diff --git a/EmulatorPkg/Unix/Host/MemoryAllocationLib.c b/EmulatorPkg/Unix/Host/MemoryAllocationLib.c
new file mode 100644
index 0000000000..76b7271872
--- /dev/null
+++ b/EmulatorPkg/Unix/Host/MemoryAllocationLib.c
@@ -0,0 +1,145 @@
+/*++ @file
+
+  Copyright (c) 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
+  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.
+
+**/
+
+#include "Base.h"
+#include "Library/BaseMemoryLib.h"
+#include "Library/MemoryAllocationLib.h"
+
+#include <stdlib.h>
+
+/**
+  Allocates a buffer of type EfiBootServicesData.
+
+  Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a
+  pointer to the allocated buffer.  If AllocationSize is 0, then a valid buffer of 0 size is
+  returned.  If there is not enough memory remaining to satisfy the request, then NULL is returned.
+
+  @param  AllocationSize        The number of bytes to allocate.
+
+  @return A pointer to the allocated buffer or NULL if allocation fails.
+
+**/
+VOID *
+EFIAPI
+AllocatePool (
+  IN UINTN  AllocationSize
+  )
+{
+  return (VOID*) malloc (AllocationSize);
+}
+
+
+/**
+  Allocates and zeros a buffer of type EfiBootServicesData.
+
+  Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the
+  buffer with zeros, and returns a pointer to the allocated buffer.  If AllocationSize is 0, then a
+  valid buffer of 0 size is returned.  If there is not enough memory remaining to satisfy the
+  request, then NULL is returned.
+
+  @param  AllocationSize        The number of bytes to allocate and zero.
+
+  @return A pointer to the allocated buffer or NULL if allocation fails.
+
+**/
+VOID *
+EFIAPI
+AllocateZeroPool (
+  IN UINTN  AllocationSize
+  )
+{
+  VOID *Buffer;
+
+  Buffer = AllocatePool (AllocationSize);
+  if (Buffer == NULL) {
+    return NULL;
+  }
+
+  ZeroMem (Buffer, AllocationSize);
+
+  return Buffer;
+}
+
+
+/**
+  Reallocates a buffer of type EfiBootServicesData.
+
+  Allocates and zeros the number bytes specified by NewSize from memory of type
+  EfiBootServicesData.  If OldBuffer is not NULL, then the smaller of OldSize and 
+  NewSize bytes are copied from OldBuffer to the newly allocated buffer, and 
+  OldBuffer is freed.  A pointer to the newly allocated buffer is returned.  
+  If NewSize is 0, then a valid buffer of 0 size is  returned.  If there is not 
+  enough memory remaining to satisfy the request, then NULL is returned.
+  
+  If the allocation of the new buffer is successful and the smaller of NewSize and OldSize
+  is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
+
+  @param  OldSize        The size, in bytes, of OldBuffer.
+  @param  NewSize        The size, in bytes, of the buffer to reallocate.
+  @param  OldBuffer      The buffer to copy to the allocated buffer.  This is an optional 
+                         parameter that may be NULL.
+
+  @return A pointer to the allocated buffer or NULL if allocation fails.
+
+**/
+VOID *
+EFIAPI
+ReallocatePool (
+  IN UINTN  OldSize,
+  IN UINTN  NewSize,
+  IN VOID   *OldBuffer  OPTIONAL
+  )
+{
+  VOID *NewBuffer;
+
+  NewBuffer = AllocatePool (NewSize);
+  if (NewBuffer == NULL) {
+    return NULL;
+  }
+
+  if (OldBuffer != NULL) {
+    if (OldSize > 0) {
+      CopyMem (NewBuffer, OldBuffer, OldSize);
+    }
+
+    FreePool (OldBuffer);
+  }
+
+  return NewBuffer;
+}
+
+
+/**
+  Frees a buffer that was previously allocated with one of the pool allocation functions in the
+  Memory Allocation Library.
+
+  Frees the buffer specified by Buffer.  Buffer must have been allocated on a previous call to the
+  pool allocation services of the Memory Allocation Library.  If it is not possible to free pool
+  resources, then this function will perform no actions.
+  
+  If Buffer was not allocated with a pool allocation function in the Memory Allocation Library,
+  then ASSERT().
+
+  @param  Buffer                Pointer to the buffer to free.
+
+**/
+VOID
+EFIAPI
+FreePool (
+  IN VOID   *Buffer
+  )
+{
+  free ((void *) Buffer);
+}
+