Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
       3             :  *
       4             :  * This source code is subject to the terms of the BSD 2 Clause License and
       5             :  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
       6             :  * was not distributed with this source code in the LICENSE file, you can
       7             :  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
       8             :  * Media Patent License 1.0 was not distributed with this source code in the
       9             :  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
      10             :  */
      11             : 
      12             : #define __AOM_MEM_C__
      13             : 
      14             : #include "aom_mem.h"
      15             : #include <stdio.h>
      16             : #include <stdlib.h>
      17             : #include <string.h>
      18             : #include "include/aom_mem_intrnl.h"
      19             : #include "aom/aom_integer.h"
      20             : 
      21           0 : static size_t GetAlignedMallocSize(size_t size, size_t align) {
      22           0 :   return size + align - 1 + ADDRESS_STORAGE_SIZE;
      23             : }
      24             : 
      25           0 : static size_t *GetMallocAddressLocation(void *const mem) {
      26           0 :   return ((size_t *)mem) - 1;
      27             : }
      28             : 
      29           0 : static void SetActualMallocAddress(void *const mem,
      30             :                                    const void *const malloc_addr) {
      31           0 :   size_t *const malloc_addr_location = GetMallocAddressLocation(mem);
      32           0 :   *malloc_addr_location = (size_t)malloc_addr;
      33           0 : }
      34             : 
      35           0 : static void *GetActualMallocAddress(void *const mem) {
      36           0 :   const size_t *const malloc_addr_location = GetMallocAddressLocation(mem);
      37           0 :   return (void *)(*malloc_addr_location);
      38             : }
      39             : 
      40           0 : void *aom_memalign(size_t align, size_t size) {
      41           0 :   void *x = NULL;
      42           0 :   const size_t aligned_size = GetAlignedMallocSize(size, align);
      43           0 :   void *const addr = malloc(aligned_size);
      44           0 :   if (addr) {
      45           0 :     x = align_addr((unsigned char *)addr + ADDRESS_STORAGE_SIZE, align);
      46           0 :     SetActualMallocAddress(x, addr);
      47             :   }
      48           0 :   return x;
      49             : }
      50             : 
      51           0 : void *aom_malloc(size_t size) { return aom_memalign(DEFAULT_ALIGNMENT, size); }
      52             : 
      53           0 : void *aom_calloc(size_t num, size_t size) {
      54           0 :   const size_t total_size = num * size;
      55           0 :   void *const x = aom_malloc(total_size);
      56           0 :   if (x) memset(x, 0, total_size);
      57           0 :   return x;
      58             : }
      59             : 
      60           0 : void aom_free(void *memblk) {
      61           0 :   if (memblk) {
      62           0 :     void *addr = GetActualMallocAddress(memblk);
      63           0 :     free(addr);
      64             :   }
      65           0 : }
      66             : 
      67             : #if CONFIG_HIGHBITDEPTH
      68           0 : void *aom_memset16(void *dest, int val, size_t length) {
      69             :   size_t i;
      70           0 :   uint16_t *dest16 = (uint16_t *)dest;
      71           0 :   for (i = 0; i < length; i++) *dest16++ = val;
      72           0 :   return dest;
      73             : }
      74             : #endif  // CONFIG_HIGHBITDEPTH