1 // VirtualAlloc.cpp : 定义控制台应用程序的入口点。
2 //
3 #include "stdafx.h"
4 #include <Windows.h>
5 #include <process.h>
6 #include <iostream>
7 using namespace std;
8
9 #ifdef UNICODE
10 #define PRINT wcout
11 #else
12 #define PRINT cout
13 #endif
14
15 int _tmain(int argc, _TCHAR* argv[])
16 {
17 SIZE_T sizeOfLargePage = GetLargePageMinimum();
18 if (0 == sizeOfLargePage)
19 {
20 cerr<<"error in GetLargePageMinium
"<<endl;
21 return -1;
22 }
23 cout<<"sizeOfLargePage is "<<sizeOfLargePage<<endl;
24
25 int nCount = 10;
26
27 //PVOID pAddr = VirtualAlloc(NULL, sizeOfLargePage * nCount, MEM_LARGE_PAGES | MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
28 PVOID pAddr = VirtualAlloc(NULL, sizeOfLargePage * nCount, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
29
30 if (NULL == pAddr)
31 {
32 cerr<<"error in VirtualAlloc
";
33 return -2;
34 }
35
36 TCHAR szBuffer[] = _T("hello world!");
37 size_t nBuffer = _countof(szBuffer);
38
39
40 // memcpy_s(pAddr, _countof(szBuffer), szBuffer, _countof(szBuffer)); //_countof参数只能是数组，返回字符数
41 memcpy_s(pAddr, sizeof(szBuffer), szBuffer,sizeof(szBuffer));
42
43
44 PRINT<<(TCHAR*)pAddr<<endl;
45
46 VirtualFree(pAddr, 0, MEM_DECOMMIT | MEM_RELEASE);
47
48 return 0;
49 }