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heapapi.h header

This header is used by System Services. For more information, see:

heapapi.h contains the following programming interfaces:

Functions

 
GetProcessHeap

Retrieves a handle to the default heap of the calling process.
GetProcessHeaps

Returns the number of active heaps and retrieves handles to all of the active heaps for the calling process.
HeapAlloc

Allocates a block of memory from a heap. The allocated memory is not movable.
HeapCompact

Returns the size of the largest committed free block in the specified heap. If the Disable heap coalesce on free global flag is set, this function also coalesces adjacent free blocks of memory in the heap.
HeapCreate

Creates a private heap object that can be used by the calling process. The function reserves space in the virtual address space of the process and allocates physical storage for a specified initial portion of this block.
HeapDestroy

Destroys the specified heap object. It decommits and releases all the pages of a private heap object, and it invalidates the handle to the heap.
HeapFree

Frees a memory block allocated from a heap by the HeapAlloc or HeapReAlloc function.
HeapLock

Attempts to acquire the critical section object, or lock, that is associated with a specified heap.
HeapQueryInformation

Retrieves information about the specified heap.
HeapReAlloc

Reallocates a block of memory from a heap. This function enables you to resize a memory block and change other memory block properties.
HeapSetInformation

Enables features for a specified heap.
HeapSize

Retrieves the size of a memory block allocated from a heap by the HeapAlloc or HeapReAlloc function.
HeapSummary

The HeapSummary function (heapapi.h) summarizes the specified heap.
HeapUnlock

Releases ownership of the critical section object, or lock, that is associated with a specified heap.
HeapValidate

Validates the specified heap. The function scans all the memory blocks in the heap and verifies that the heap control structures maintained by the heap manager are in a consistent state.
HeapWalk

Enumerates the memory blocks in the specified heap.

Structures

 
HEAP_SUMMARY

The HEAP_SUMMARY structure (heapapi.h) represents a heap summary retrieved with a call to the HeapSummary function.