_heapchk

Remonter à alloc.h - Index

Header File

malloc.h

Category

Memory Routines

Syntax

int _heapchk(void);

Description

Checks and verifies the heap.

_heapchk walks through the heap and examines each block, checking its pointers, size, and other critical attributes.

Return Value

One of the following values:

_HEAPBADNODE	A corrupted heap block has been found
_HEAPEMPTY	No heap exists
_HEAPOK	The heap appears to be uncorrupted

Example

#include <stdio.h>
#include <alloc.h>

#define NUM_PTRS  10
#define NUM_BYTES 16

int main(void)
{
  char *array[ NUM_PTRS ];
  int i;

  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( heapcheck() == _HEAPCORRUPT )
     printf( "Heap is corrupted.\n" );
  else
     printf( "Heap is OK.\n" );

  return 0;
}

Portability

POSIX	Win32	ANSI C	ANSI C++
	+