Releases unused heap memory to the operating system.
Syntax
int _heapmin( void );
Return value
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.
Remarks
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.
Requirements
| Routine | Required header | Optional header |
|---|---|---|
_heapmin |
<malloc.h> | <errno.h> |
For more compatibility information, see Compatibility.
See also
Memory allocation
free
_heapadd
_heapchk
_heapset
_heapwalk
malloc