src/libFLAC/memory.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2001,2002,2003,2004,2005  Josh Coalson
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * - Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *
  11  * - Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  *
  15  * - Neither the name of the Xiph.org Foundation nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "private/memory.h"
  33 #include "FLAC/assert.h"
  34
  35 #ifdef HAVE_CONFIG_H
  36 #include <config.h>
  37 #endif
  38
  39 void *FLAC__memory_alloc_aligned(size_t bytes, void **aligned_address)
  40 {
  41         void *x;
  42
  43         FLAC__ASSERT(0 != aligned_address);
  44
  45 #ifdef FLAC__ALIGN_MALLOC_DATA
  46         /* align on 32-byte (256-bit) boundary */
  47         x = malloc(bytes+31);
  48         *aligned_address = (void*)(((unsigned)x + 31) & -32);
  49 #else
  50         x = malloc(bytes);
  51         *aligned_address = x;
  52 #endif
  53         return x;
  54 }
  55
  56 FLAC__bool FLAC__memory_alloc_aligned_int32_array(unsigned elements, FLAC__int32 **unaligned_pointer, FLAC__int32 **aligned_pointer)
  57 {
  58         FLAC__int32 *pu; /* unaligned pointer */
  59         union { /* union needed to comply with C99 pointer aliasing rules */
  60                 FLAC__int32 *pa; /* aligned pointer */
  61                 void        *pv; /* aligned pointer alias */
  62         } u;
  63
  64         FLAC__ASSERT(elements > 0);
  65         FLAC__ASSERT(0 != unaligned_pointer);
  66         FLAC__ASSERT(0 != aligned_pointer);
  67         FLAC__ASSERT(unaligned_pointer != aligned_pointer);
  68
  69         pu = (FLAC__int32*)FLAC__memory_alloc_aligned(sizeof(FLAC__int32) * elements, &u.pv);
  70         if(0 == pu) {
  71                 return false;
  72         }
  73         else {
  74                 if(*unaligned_pointer != 0)
  75                         free(*unaligned_pointer);
  76                 *unaligned_pointer = pu;
  77                 *aligned_pointer = u.pa;
  78                 return true;
  79         }
  80 }
  81
  82 FLAC__bool FLAC__memory_alloc_aligned_uint32_array(unsigned elements, FLAC__uint32 **unaligned_pointer, FLAC__uint32 **aligned_pointer)
  83 {
  84         FLAC__uint32 *pu; /* unaligned pointer */
  85         union { /* union needed to comply with C99 pointer aliasing rules */
  86                 FLAC__uint32 *pa; /* aligned pointer */
  87                 void         *pv; /* aligned pointer alias */
  88         } u;
  89
  90         FLAC__ASSERT(elements > 0);
  91         FLAC__ASSERT(0 != unaligned_pointer);
  92         FLAC__ASSERT(0 != aligned_pointer);
  93         FLAC__ASSERT(unaligned_pointer != aligned_pointer);
  94
  95         pu = (FLAC__uint32*)FLAC__memory_alloc_aligned(sizeof(FLAC__uint32) * elements, &u.pv);
  96         if(0 == pu) {
  97                 return false;
  98         }
  99         else {
 100                 if(*unaligned_pointer != 0)
 101                         free(*unaligned_pointer);
 102                 *unaligned_pointer = pu;
 103                 *aligned_pointer = u.pa;
 104                 return true;
 105         }
 106 }
 107
 108 FLAC__bool FLAC__memory_alloc_aligned_uint64_array(unsigned elements, FLAC__uint64 **unaligned_pointer, FLAC__uint64 **aligned_pointer)
 109 {
 110         FLAC__uint64 *pu; /* unaligned pointer */
 111         union { /* union needed to comply with C99 pointer aliasing rules */
 112                 FLAC__uint64 *pa; /* aligned pointer */
 113                 void         *pv; /* aligned pointer alias */
 114         } u;
 115
 116         FLAC__ASSERT(elements > 0);
 117         FLAC__ASSERT(0 != unaligned_pointer);
 118         FLAC__ASSERT(0 != aligned_pointer);
 119         FLAC__ASSERT(unaligned_pointer != aligned_pointer);
 120
 121         pu = (FLAC__uint64*)FLAC__memory_alloc_aligned(sizeof(FLAC__uint64) * elements, &u.pv);
 122         if(0 == pu) {
 123                 return false;
 124         }
 125         else {
 126                 if(*unaligned_pointer != 0)
 127                         free(*unaligned_pointer);
 128                 *unaligned_pointer = pu;
 129                 *aligned_pointer = u.pa;
 130                 return true;
 131         }
 132 }
 133
 134 FLAC__bool FLAC__memory_alloc_aligned_unsigned_array(unsigned elements, unsigned **unaligned_pointer, unsigned **aligned_pointer)
 135 {
 136         unsigned *pu; /* unaligned pointer */
 137         union { /* union needed to comply with C99 pointer aliasing rules */
 138                 unsigned *pa; /* aligned pointer */
 139                 void     *pv; /* aligned pointer alias */
 140         } u;
 141
 142         FLAC__ASSERT(elements > 0);
 143         FLAC__ASSERT(0 != unaligned_pointer);
 144         FLAC__ASSERT(0 != aligned_pointer);
 145         FLAC__ASSERT(unaligned_pointer != aligned_pointer);
 146
 147         pu = (unsigned*)FLAC__memory_alloc_aligned(sizeof(unsigned) * elements, &u.pv);
 148         if(0 == pu) {
 149                 return false;
 150         }
 151         else {
 152                 if(*unaligned_pointer != 0)
 153                         free(*unaligned_pointer);
 154                 *unaligned_pointer = pu;
 155                 *aligned_pointer = u.pa;
 156                 return true;
 157         }
 158 }
 159
 160 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 161
 162 FLAC__bool FLAC__memory_alloc_aligned_real_array(unsigned elements, FLAC__real **unaligned_pointer, FLAC__real **aligned_pointer)
 163 {
 164         FLAC__real *pu; /* unaligned pointer */
 165         union { /* union needed to comply with C99 pointer aliasing rules */
 166                 FLAC__real *pa; /* aligned pointer */
 167                 void       *pv; /* aligned pointer alias */
 168         } u;
 169
 170         FLAC__ASSERT(elements > 0);
 171         FLAC__ASSERT(0 != unaligned_pointer);
 172         FLAC__ASSERT(0 != aligned_pointer);
 173         FLAC__ASSERT(unaligned_pointer != aligned_pointer);
 174
 175         pu = (FLAC__real*)FLAC__memory_alloc_aligned(sizeof(FLAC__real) * elements, &u.pv);
 176         if(0 == pu) {
 177                 return false;
 178         }
 179         else {
 180                 if(*unaligned_pointer != 0)
 181                         free(*unaligned_pointer);
 182                 *unaligned_pointer = pu;
 183                 *aligned_pointer = u.pa;
 184                 return true;
 185         }
 186 }
 187
 188 #endif