MdePkg/Library/BaseMemoryLibMmx/ZeroMemWrapper.c

   1 /** @file
   2   ZeroMem() implementation.
   3
   4   The following BaseMemoryLib instances contain the same copy of this file:
   5
   6     BaseMemoryLib
   7     BaseMemoryLibMmx
   8     BaseMemoryLibSse2
   9     BaseMemoryLibRepStr
  10     BaseMemoryLibOptDxe
  11     BaseMemoryLibOptPei
  12     PeiMemoryLib
  13     UefiMemoryLib
  14
  15   Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
  16   SPDX-License-Identifier: BSD-2-Clause-Patent
  17
  18 **/
  19
  20 #include "MemLibInternals.h"
  21
  22 /**
  23   Fills a target buffer with zeros, and returns the target buffer.
  24
  25   This function fills Length bytes of Buffer with zeros, and returns Buffer.
  26
  27   If Length > 0 and Buffer is NULL, then ASSERT().
  28   If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
  29
  30   @param  Buffer      The pointer to the target buffer to fill with zeros.
  31   @param  Length      The number of bytes in Buffer to fill with zeros.
  32
  33   @return Buffer.
  34
  35 **/
  36 VOID *
  37 EFIAPI
  38 ZeroMem (
  39   OUT VOID  *Buffer,
  40   IN UINTN  Length
  41   )
  42 {
  43   if (Length == 0) {
  44     return Buffer;
  45   }
  46
  47   ASSERT (Buffer != NULL);
  48   ASSERT (Length <= (MAX_ADDRESS - (UINTN)Buffer + 1));
  49   return InternalMemZeroMem (Buffer, Length);
  50 }