【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 ;

 }