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: Windows 2000, Windows XP, Windows Server 2003 family
Header: MSCorEE.idl
Library: Included as a resource in MSCorEE.dll
.NET Framework Version: 2.0