IHostMemoryManager::VirtualProtect Method

Serves as a logical wrapper for the corresponding Win32 function. The Win32 implementation of VirtualProtect changes the protection on a region of committed pages in the virtual address space of the calling process.

HRESULT VirtualProtect (
    [in]  void*   lpAddress,
    [in]  SIZE_T  dwSize,
    [in]  DWORD   flNewProtect,
    [out] DWORD*  pflOldProtect
);

Parameters

• lpAddress
  [in] A pointer to the base address of the virtual memory whose protection attributes are to be changed.

• dwSize
  [in] The size, in bytes, of the region of memory pages to be changed.

• flNewProtect
  [in] The type of memory protection to apply.

• pflOldProtect
  [out] A pointer to the previous memory protection value.

Return Value

HRESULT	Description
S_OK	VirtualProtect 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.

Remarks

This implementation of VirtualProtect returns an HRESULT value, while the Win32 implementation returns a non-zero value to indicate success, and a zero value to indicate failure. For more information, see the Windows Platform documentation.

Requirements

Platforms: See .NET Framework System Requirements.

Header: MSCorEE.idl

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: 3.5 SP1, 3.5, 3.0 SP1, 3.0, 2.0 SP1, 2.0

See Also

Reference

IHostMemoryManager Interface