27 windows_27_windows_Virtual_Memory 虚拟内存

// windows_27_windows_Virtual_Memory.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <windows.h>
#include <conio.h>
void Status( )
{
  MEMORYSTATUS status = { 0 };
  status.dwLength = sizeof( status );
  GlobalMemoryStatus( &status );
  printf( "总共的物理内存:%u\n", status.dwTotalPhys);
  printf( "剩余的物理内存:%u\n", status.dwAvailPhys);
  printf( "总共的分页:%u\n", status.dwTotalPageFile);
  printf( "剩余的分布:%u\n", status.dwAvailPageFile);
  printf( "总共的虚拟:%u\n", status.dwTotalVirtual);
  printf( "剩余的虚拟:%u\n", status.dwAvailVirtual);
  printf( "内存使用率:%d\n",status.dwMemoryLoad );
}
void Virual( )
{
  Status( );
  //地址分配 - 预订
  CHAR *pszBuf = (CHAR*)VirtualAlloc( NULL, 1024 * 1024 * 1024, MEM_RELEASE, PAGE_READWRITE );
  getchar( );
  Status( );
  //内存提交 
  pszBuf = (CHAR*)VirtualAlloc( NULL, 1024 * 1024 * 1024, MEM_COMMIT, PAGE_READWRITE );
  Status( );
  if (pszBuf == NULL)
  {
    printf( "failed!\n" );
  }
  getchar( );
  //strcpy_s( pszBuf,10, "hello virtual\n" );
  printf( "%s", pszBuf );
  VirtualFree( pszBuf, 1024 * 1024 * 1024, MEM_RELEASE );
}
int _tmain(int argc, _TCHAR* argv[])
{
  Virual( );
  Status( );
	return 0;
}