【Windows核心编程】VirtualAlloc 例子

 // VirtualAlloc.cpp : 定义控制台应用程序的入口点。
 //
 #include "stdafx.h"
 #include <Windows.h>
 #include <process.h>
 #include <iostream>
 using namespace std;

 #ifdef UNICODE
 #define  PRINT wcout
 #else
 #define  PRINT cout
 #endif

 int _tmain(int argc, _TCHAR* argv[])
 {
     SIZE_T sizeOfLargePage = GetLargePageMinimum();
     if ( == sizeOfLargePage)
     {
         cerr<<"error in GetLargePageMinium \n"<<endl;
         return -;
     }
     cout<<"sizeOfLargePage is "<<sizeOfLargePage<<endl;

     int nCount = ;

     //PVOID pAddr = VirtualAlloc(NULL, sizeOfLargePage * nCount, MEM_LARGE_PAGES | MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
     PVOID pAddr = VirtualAlloc(NULL, sizeOfLargePage * nCount, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);

     if (NULL == pAddr)
     {
         cerr<<"error in VirtualAlloc \n";
         return -;
     }

     TCHAR szBuffer[] = _T("hello world!");
     size_t nBuffer = _countof(szBuffer); 

    // memcpy_s(pAddr, _countof(szBuffer), szBuffer, _countof(szBuffer)); //_countof参数只能是数组，返回字符数
     memcpy_s(pAddr, sizeof(szBuffer), szBuffer,sizeof(szBuffer));

     PRINT<<(TCHAR*)pAddr<<endl;

     VirtualFree(pAddr, , MEM_DECOMMIT | MEM_RELEASE); 

     return ;
 }