Release unused heap memory to the operating system.
#include <malloc.h>
int _heapmin( void );
int _bheapmin( __segment seg )
int _fheapmin( void );
int _nheapmin( void );
| seg | Specified based-heap selector |
The _heapmin functions minimize the heap by releasing unused heap memory to the operating system.
The various _heapmin functions release unused memory in these heaps:
| Function | Heap Minimized |
| _heapmin | Depends on data model of program. |
| _bheapmin | Based heap specified by seg value; _NULLSEG specifies all based heaps. |
| _fheapmin | Far heap (outside default data segment). |
| _nheapmin | Near heap (inside default data segment). |
In large data models (that is, compact-, large-, and huge-model programs), _heapmin maps to _fheapmin. In small data models (tiny-, small-, and medium-model programs), _heapmin maps to _nheapmin.
For _heapmin, if the supplied seg value is _NULLSEG, all based heap segments are minimized; otherwise, only the specified one is minimized.
Based-heap segments are never freed (i.e., unlinked from the based heap list and released back to the operating system) by the _bheapmin function. The _bfreeseg function is used for that purpose.
The _heapmin functions return 0 if the function completed successfully, or –1 in the case of an error.
_heapmin
Standards:None
16-Bit:DOS, QWIN, WIN, WIN DLL
32-Bit:DOS32X
_bheapmin, _fheapmin, _nheapmin
Standards:None
16-Bit:DOS, QWIN, WIN, WIN DLL
32-Bit:None