MemoryLock.cpp
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// Common/MemoryLock.cpp
#include "StdAfx.h"
namespace NWindows {
namespace NSecurity {
#ifndef _UNICODE
typedef BOOL (WINAPI * OpenProcessTokenP)(HANDLE ProcessHandle, DWORD DesiredAccess, PHANDLE TokenHandle);
typedef BOOL (WINAPI * LookupPrivilegeValueP)(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid);
typedef BOOL (WINAPI * AdjustTokenPrivilegesP)(HANDLE TokenHandle, BOOL DisableAllPrivileges,
PTOKEN_PRIVILEGES NewState, DWORD BufferLength, PTOKEN_PRIVILEGES PreviousState,PDWORD ReturnLength);
#endif
#ifdef _UNICODE
bool EnableLockMemoryPrivilege(
#else
static bool EnableLockMemoryPrivilege2(HMODULE hModule,
#endif
bool enable)
{
#ifndef _UNICODE
if (hModule == NULL)
return false;
OpenProcessTokenP openProcessToken = (OpenProcessTokenP)GetProcAddress(hModule, "OpenProcessToken");
LookupPrivilegeValueP lookupPrivilegeValue = (LookupPrivilegeValueP)GetProcAddress(hModule, "LookupPrivilegeValueA" );
AdjustTokenPrivilegesP adjustTokenPrivileges = (AdjustTokenPrivilegesP)GetProcAddress(hModule, "AdjustTokenPrivileges");
if (openProcessToken == NULL || adjustTokenPrivileges == NULL || lookupPrivilegeValue == NULL)
return false;
#endif
HANDLE token;
if (!
#ifdef _UNICODE
::OpenProcessToken
#else
openProcessToken
#endif
(::GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &token))
return false;
TOKEN_PRIVILEGES tp;
bool res = false;
if (
#ifdef _UNICODE
::LookupPrivilegeValue
#else
lookupPrivilegeValue
#endif
(NULL, SE_LOCK_MEMORY_NAME, &(tp.Privileges[0].Luid)))
{
tp.PrivilegeCount = 1;
tp.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED: 0;
if (
#ifdef _UNICODE
::AdjustTokenPrivileges
#else
adjustTokenPrivileges
#endif
(token, FALSE, &tp, 0, NULL, NULL))
res = (GetLastError() == ERROR_SUCCESS);
}
::CloseHandle(token);
return res;
}
#ifndef _UNICODE
bool EnableLockMemoryPrivilege(bool enable)
{
HMODULE hModule = LoadLibrary(TEXT("Advapi32.dll"));
if(hModule == NULL)
return false;
bool res = EnableLockMemoryPrivilege2(hModule, enable);
::FreeLibrary(hModule);
return res;
}
#endif
}}