_get_heap_handle

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at _get_heap_handle.

Returns the handle of the heap that's used by the C run-time system.

Syntax

intptr_t _get_heap_handle( void );  

Return Value

Returns the handle to the Win32 heap used by the C run-time system.

Remarks

Use this function if you want to call HeapSetInformation and enable the Low Fragmentation Heap on the CRT heap.

Requirements

For more compatibility information, see Compatibility.

Sample

// crt_get_heap_handle.cpp  
// compile with: /MT  
#include <windows.h>  
#include <malloc.h>  
#include <stdio.h>  
  
int main(void)  
{  
    intptr_t hCrtHeap = _get_heap_handle();  
    ULONG ulEnableLFH = 2;  
    if (HeapSetInformation((PVOID)hCrtHeap,  
                           HeapCompatibilityInformation,  
                           &ulEnableLFH, sizeof(ulEnableLFH)))  
        puts("Enabling Low Fragmentation Heap succeeded");  
    else  
        puts("Enabling Low Fragmentation Heap failed");  
    return 0;  
}  

See Also

Memory Allocation