Memory Management Functions (Compact 2013)

3/28/2014

The following table shows the memory management functions with a description of the purpose of each.

Function	Description
GetDllVersion	Obtains the major and minor version numbers of the system that the specified DLL expects to run on.
GetProcessHeap	Obtains a handle to the heap of the calling process.
GlobalMemoryStatus	Obtains information on the physical and virtual memory of the system.
HeapAlloc	Allocates a block of memory from a heap.
HeapCompact	Compact a specified heap by combining adjacent free blocks of memory and decommitting large free blocks of memory.
HeapCreate	Creates a heap object that is private to the calling process.
HeapDestroy	Destroys the specified heap object.
HeapFree	Frees a memory block allocated from a heap by the HeapAlloc or HeapReAlloc function.
HeapReAlloc	Reallocates a block of memory from a heap.
HeapSize	Returns the size, in bytes, of a memory block allocated from a heap by the HeapAlloc or HeapReAlloc function.
HeapValidate	Validates the specified heap. HeapValidate 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. The HeapValidate function can also be used to validate a single memory block within a specified heap without checking the validity of the entire heap.
IsBadCodePtr	Checks whether the calling process has read access to the memory at the specified address.
IsBadReadPtr	Checks whether the calling process has read access to the specified range of memory.
IsBadWritePtr	Checks whether the calling process has write access to the specified range of memory.
LocalAlloc	Allocates the specified number of bytes from the heap.
LocalFree	Frees the specified local memory object and invalidates its handle.
LocalReAlloc	Changes the size or the attributes of a specified local memory object.
LocalSize	Returns the current size, in bytes, of the specified local memory object.
SecureZeroMemory	Fills a block of memory with zeros.
VirtualAlloc	Reserves or commits a region of pages in the virtual address space of the calling process.
VirtualFree	Releases or decommits, or both, a region of pages within the virtual address space of the calling process.
VirtualProtect	This function changes the access protection on a region of committed pages in the virtual address space of the calling process.
VirtualQuery	This function provides information about a range of pages in the virtual address space of the calling process.

Function	Description
CeHeapCreate	Enables users to create a heap with a custom allocator or deallocator function.
CeRemoteHeapCreate	Creates a remote heap in a process. The heap is read-only to the client process, unless the HEAP_CLIENT_READWRITE flag is specified.
CeRemoteHeapTranslatePointer	Converts a pointer to an address that the client process can access.
CeSafeCopyMemory	Copies data in memory between buffers.
VirtualAllocEx	Reserves or commits a region of pages in the virtual address space of the calling process. Memory allocated by VirtualAlloc is initialized to zero.
VirtualAllocCopyEx	Reserves or commits a region of pages in the virtual address space of the calling process, and then dynamically maps a virtual address to a physical address by creating a new page-table entry. Terminate the mapping by calling VirtualFreeEx.
VirtualCopyEx	Dynamically maps a virtual address to a physical address by creating a new page-table entry. Terminate the mapping by calling VirtualFree.
VirtualFreeEx	Releases or decommits, or both, a region of pages within the virtual address space of the calling process.
VirtualQueryEx	Provides information about a range of pages in the virtual address space of the calling process.
VirtualProtectEx	Changes the access protection on a region of committed pages in the virtual address space of the calling process.
VirtualSetAttributesEx	Changes the per-page attributes for a range of virtual memory, which is usually copied from a physical location not known to the kernel. This function is callable only in kernel mode.

See Also

Reference

Memory Management Reference