_heapmin

Releases unused heap memory to the operating system.

int _heapmin( void );

If successful, _heapmin returns 0; otherwise, the function returns -1 and sets errno to ENOSYS.

For more information about this and other return codes, see errno, _doserrno, _sys_errlist, and _sys_nerr.

The _heapmin function minimizes the heap by releasing unused heap memory to the operating system. If the operating system doesn't support _heapmin (for example, Windows 98), the function returns -1 and sets errno to ENOSYS.

By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.

For more compatibility information, see Compatibility.

Memory allocation
free
_heapadd
_heapchk
_heapset
_heapwalk
malloc