EmulatorPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / EmulatorPkg / Unix / Host / MemoryAllocationLib.c

/*++ @file\r
\r
  Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "Base.h"\r
#include "Library/BaseMemoryLib.h"\r
#include "Library/MemoryAllocationLib.h"\r
\r
#include <stdlib.h>\r
\r
/**\r
  Allocates a buffer of type EfiBootServicesData.\r
\r
  Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a\r
  pointer to the allocated buffer.  If AllocationSize is 0, then a valid buffer of 0 size is\r
  returned.  If there is not enough memory remaining to satisfy the request, then NULL is returned.\r
\r
  @param  AllocationSize        The number of bytes to allocate.\r
\r
  @return A pointer to the allocated buffer or NULL if allocation fails.\r
\r
**/\r
VOID *\r
EFIAPI\r
AllocatePool (\r
  IN UINTN  AllocationSize\r
  )\r
{\r
  return (VOID*) malloc (AllocationSize);\r
}\r
\r
\r
/**\r
  Allocates and zeros a buffer of type EfiBootServicesData.\r
\r
  Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the\r
  buffer with zeros, and returns a pointer to the allocated buffer.  If AllocationSize is 0, then a\r
  valid buffer of 0 size is returned.  If there is not enough memory remaining to satisfy the\r
  request, then NULL is returned.\r
\r
  @param  AllocationSize        The number of bytes to allocate and zero.\r
\r
  @return A pointer to the allocated buffer or NULL if allocation fails.\r
\r
**/\r
VOID *\r
EFIAPI\r
AllocateZeroPool (\r
  IN UINTN  AllocationSize\r
  )\r
{\r
  VOID *Buffer;\r
\r
  Buffer = AllocatePool (AllocationSize);\r
  if (Buffer == NULL) {\r
    return NULL;\r
  }\r
\r
  ZeroMem (Buffer, AllocationSize);\r
\r
  return Buffer;\r
}\r
\r
\r
/**\r
  Reallocates a buffer of type EfiBootServicesData.\r
\r
  Allocates and zeros the number bytes specified by NewSize from memory of type\r
  EfiBootServicesData.  If OldBuffer is not NULL, then the smaller of OldSize and\r
  NewSize bytes are copied from OldBuffer to the newly allocated buffer, and\r
  OldBuffer is freed.  A pointer to the newly allocated buffer is returned.\r
  If NewSize is 0, then a valid buffer of 0 size is  returned.  If there is not\r
  enough memory remaining to satisfy the request, then NULL is returned.\r
\r
  If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r
  is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r
\r
  @param  OldSize        The size, in bytes, of OldBuffer.\r
  @param  NewSize        The size, in bytes, of the buffer to reallocate.\r
  @param  OldBuffer      The buffer to copy to the allocated buffer.  This is an optional\r
                         parameter that may be NULL.\r
\r
  @return A pointer to the allocated buffer or NULL if allocation fails.\r
\r
**/\r
VOID *\r
EFIAPI\r
ReallocatePool (\r
  IN UINTN  OldSize,\r
  IN UINTN  NewSize,\r
  IN VOID   *OldBuffer  OPTIONAL\r
  )\r
{\r
  VOID *NewBuffer;\r
\r
  NewBuffer = AllocatePool (NewSize);\r
  if (NewBuffer == NULL) {\r
    return NULL;\r
  }\r
\r
  if (OldBuffer != NULL) {\r
    if (OldSize > 0) {\r
      CopyMem (NewBuffer, OldBuffer, OldSize);\r
    }\r
\r
    FreePool (OldBuffer);\r
  }\r
\r
  return NewBuffer;\r
}\r
\r
\r
/**\r
  Frees a buffer that was previously allocated with one of the pool allocation functions in the\r
  Memory Allocation Library.\r
\r
  Frees the buffer specified by Buffer.  Buffer must have been allocated on a previous call to the\r
  pool allocation services of the Memory Allocation Library.  If it is not possible to free pool\r
  resources, then this function will perform no actions.\r
\r
  If Buffer was not allocated with a pool allocation function in the Memory Allocation Library,\r
  then ASSERT().\r
\r
  @param  Buffer                Pointer to the buffer to free.\r
\r
**/\r
VOID\r
EFIAPI\r
FreePool (\r
  IN VOID   *Buffer\r
  )\r
{\r
  free ((void *) Buffer);\r
}\r
\r