IHostMemoryManager::VirtualFree Method

Artikkeli
09/15/2021

Serves as a logical wrapper for the corresponding Win32 function. The Win32 implementation of VirtualFree releases, decommits, or releases and decommits a region of pages within the virtual address space of the calling process.

Syntax

HRESULT VirtualFree (  
    [in] LPVOID  lpAddress,  
    [in] SIZE_T  dwSize,  
    [in] DWORD   dwFreeType  
);

Parameters

lpAddress
[in] A pointer to the base address of the virtual memory pages to be freed.

dwSize
[in] The size, in bytes, of the region to be freed.

dwFreeType
[in] The type of freeing operation.

Return Value

HRESULT	Description
S_OK	`VirtualFree` returned successfully.
HOST_E_CLRNOTAVAILABLE	The common language runtime (CLR) has not been loaded into a process, or the CLR is in a state in which it cannot run managed code or process the call successfully.
HOST_E_TIMEOUT	The call timed out.
HOST_E_NOT_OWNER	The caller does not own the lock.
HOST_E_ABANDONED	An event was canceled while a blocked thread or fiber was waiting on it.
E_FAIL	An unknown catastrophic failure occurred. When a method returns E_FAIL, the CLR is no longer usable within the process. Subsequent calls to hosting methods return HOST_E_CLRNOTAVAILABLE.
HOST_E_INVALIDOPERATION	An attempt was made to free memory that was not allocated through the host.

Remarks

VirtualFree frees virtual memory pages associated with the lpAddress parameter through an earlier call to the IHostMemoryManager::VirtualAlloc function. Attempts to free memory that was not allocated through the host should return HOST_E_INVALIDOPERATION.

The semantics are identical to those of the Win32 implementation of VirtualFree. For more information, see the Windows Platform documentation.

Requirements

Platforms: See System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: Available since 2.0

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