common/alloc.c

   1 /*****************************************************************************
   2  * alloc.c
   3  *****************************************************************************
   4  * Copyright (C) 2011-2014 L-SMASH project
   5  *
   6  * Authors: Yusuke Nakamura <muken.the.vfrmaniac@gmail.com>
   7  *
   8  * Permission to use, copy, modify, and/or distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  *****************************************************************************/
  20
  21 /* This file is available under an ISC license. */
  22
  23 #include "internal.h" /* must be placed first */
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 void *lsmash_malloc( size_t size )
  29 {
  30     return malloc( size );
  31 }
  32
  33 void *lsmash_malloc_zero( size_t size )
  34 {
  35     if( !size )
  36         return NULL;
  37     void *p = malloc( size );
  38     if( !p )
  39         return NULL;
  40     memset( p, 0, size );
  41     return p;
  42 }
  43
  44 void *lsmash_realloc( void *ptr, size_t size )
  45 {
  46     return realloc( ptr, size );
  47 }
  48
  49 void *lsmash_memdup( const void *ptr, size_t size )
  50 {
  51     if( !ptr || size == 0 )
  52         return NULL;
  53     void *dst = malloc( size );
  54     if( !dst )
  55         return NULL;
  56     memcpy( dst, ptr, size );
  57     return dst;
  58 }
  59
  60 void lsmash_free( void *ptr )
  61 {
  62     /* free() shall do nothing if a given address is NULL. */
  63     free( ptr );
  64 }
  65
  66 void lsmash_freep( void *ptrptr )
  67 {
  68     if( !ptrptr )
  69         return;
  70     void **ptr = (void **)ptrptr;
  71     free( *ptr );
  72     *ptr = NULL;
  73 }