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REALLOC.C
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─────Run-Time Library───────────────────────────────────────────────────────
/* REALLOC.C illustrates heap functions:
* calloc realloc _expand
*/
#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
void main()
{
int *bufint;
char *bufchar;
printf( "Allocate two 512 element buffers\n" );
if( (bufint = (int *)calloc( 512, sizeof( int ) )) == NULL )
exit( 1 );
printf( "Allocated %d bytes at %Fp\n",
_msize( bufint ), (void __far *)bufint );
if( (bufchar = (char *)calloc( 512, sizeof( char ) )) == NULL )
exit( 1 );
printf( "Allocated %d bytes at %Fp\n",
_msize( bufchar ), (void __far *)bufchar );
/* Expand the second buffer, reallocate the first. Note that trying
* to expand the first buffer would fail because the second buffer
* would be in the way.
*/
if( (bufchar = (char *)_expand( bufchar, 1024 )) == NULL )
printf( "Can't expand" );
else
printf( "Expanded block to %d bytes at %Fp\n",
_msize( bufchar ), (void __far *)bufchar );
if( (bufint = (int *)realloc( bufint, 1024 * sizeof( int ) )) == NULL )
printf( "Can't reallocate" );
else
printf( "Reallocated block to %d bytes at %Fp\n",
_msize( bufint ), (void __far *)bufint );
/* Free memory */
free( bufint );
free( bufchar );
exit( 0 );
}
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