heapfillfree
Remonter à Alloc.h - Index
Header File
alloc.h
Category
Memory Routines
Prototype
int heapfillfree(unsigned int fillvalue);
Description
Fills the free blocks on the heap with a constant value.
Return Value
One of the following values:
_HEAPCORRUPT |
Heap has been corrupted |
_HEAPEMPTY |
No heap |
_HEAPOK |
Heap is accurate |
Example
#include <stdio.h>
#include <alloc.h>
#include <mem.h>
#define NUM_PTRS 10
#define NUM_BYTES 16
int main(void)
{
char *array[ NUM_PTRS ];
int i;
int res;
for( i = 0; i < NUM_PTRS; i++ )
array[ i ] = (char *) malloc( NUM_BYTES );
for( i = 0; i < NUM_PTRS; i += 2 )
free( array[ i ] );
if( heapfillfree( 1 ) < 0 )
{
printf( "Heap corrupted.\n" );
return 1;
}
for( i = 1; i < NUM_PTRS; i += 2 )
memset( array[ i ], 0, NUM_BYTES );
res = heapcheckfree( 1 );
if( res < 0 )
switch( res )
{
case _HEAPCORRUPT:
printf( "Heap corrupted.\n" );
return 1;
case _BADVALUE:
printf( "Bad value in free space.\n" );
return 1;
default:
printf( "Unknown error.\n" );
return 1;
}
printf( "Test successful.\n" );
return 0;
}
Portability
POSIX | Win32 | ANSI C | ANSI C++ |
---|---|---|---|
+ |