[cvs] / xvidcore / src / utils / mem_align.c Repository:
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Diff of /xvidcore/src/utils/mem_align.c

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revision 1.1, Fri Mar 8 02:44:58 2002 UTC revision 1.2, Wed Mar 20 00:27:57 2002 UTC
# Line 0  Line 1 
1    #include <stdlib.h>
2    #include <stdio.h>
3    #include "mem_align.h"
4    
5    void *xvid_malloc(size_t size, uint8_t alignment)
6    {
7      uint8_t *mem_ptr;
8    
9      if(alignment == 0)
10      {
11              if((mem_ptr = (uint8_t *) malloc(size + 1)) != NULL) {
12                    *mem_ptr = 0;
13                    return (void *) mem_ptr++;
14              }
15      }
16      else
17      {
18              uint8_t *tmp;
19    
20              if((tmp = (uint8_t *) malloc(size + alignment)) != NULL) {
21                    mem_ptr = (uint8_t *) (((uint32_t) tmp / alignment) * alignment + alignment);
22                    *(mem_ptr - 1) = (alignment - 1) - ((uint32_t) tmp % alignment);
23                    return (void *) mem_ptr;
24              }
25      }
26    
27      return NULL;
28    }
29    
30    void xvid_free(void *mem_ptr)
31    {
32      uint8_t *tmp;
33    
34      tmp = (uint8_t *) mem_ptr - 1;
35      mem_ptr  = tmp - *tmp;
36    
37      free(mem_ptr);
38    }
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