repos_main/common/文件映射内存地址.cpp

// ConsoleApplication1.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "ConsoleApplication1.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

#define TFILE  _T("\\\\it-server\\IT软件区$\\K刻录驱动\\刻录驱动.rar")
#define TFILE2  _T("H:\\C# WPF 基础教程2.zip")
// 唯一的应用程序对象

CWinApp theApp;

using namespace std;

int main()
{
    int nRetCode = 0;

    HMODULE hModule = ::GetModuleHandle(nullptr);

    if (hModule != nullptr)
    {
        // 初始化 MFC 并在失败时显示错误
        if (!AfxWinInit(hModule, nullptr, ::GetCommandLine(), 0))
        {
            // TODO: 更改错误代码以符合您的需要
            wprintf(L"错误: MFC 初始化失败\n");
            nRetCode = 1;
        }
        else
        {
			DeleteFile(TFILE2);
            // TODO: 在此处为应用程序的行为编写代码。
			DWORD dwTickCount = GetTickCount();
#ifndef F2// 内存映射读文件;
			HANDLE hFile = NULL;
			HANDLE hFileMap = NULL;
			LARGE_INTEGER liResult;
			hFile = CreateFile(TFILE, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
			if (INVALID_HANDLE_VALUE == hFile)
			{
				goto __TestEnd;
			}

			// 创建文件映射;
			hFileMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, NULL);
			if (NULL == hFileMap)
			{
				goto __TestEnd;
			}

			//得到系统分配粒度;
			SYSTEM_INFO si;
			GetSystemInfo(&si);
			DWORD dwSysGran = si.dwAllocationGranularity;

			//得到文件大小;
			LARGE_INTEGER lFileSize;
			GetFileSizeEx(hFile, &lFileSize);
			CloseHandle(hFile);
			hFile = INVALID_HANDLE_VALUE;

			LPBYTE lpData = (LPBYTE)MapViewOfFile(hFileMap, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);

			FILE* fp = NULL;
			fp = _tfopen(TFILE2, _T("ab+"));
			fwrite(lpData, lFileSize.QuadPart, 1, fp);
			fclose(fp);

			// 取消文件映射;
			UnmapViewOfFile(lpData);
#if 0
			//性能方面，都知道容器大小了就先初始化大小，免得用vector自己的扩容机制浪费CPU
			//vecTime.resize(200, 0);
			char szPath[MAX_PATH] = { 0 };
			for (int i = 1; i <= 200; ++i)
			{
				__int64 qwFileOffset = 0;
				__int64 qwFileSize = lFileSize.QuadPart;
				DWORD dwDataLen = 0;
				FILE* fp = NULL;
				DWORD dwBlockBytes = i*dwSysGran;
				if (lFileSize.QuadPart < dwBlockBytes)
					dwBlockBytes = lFileSize.QuadPart;
				sprintf(szPath, "d:\\test\\%d.zip", i);
				//DeleteFileA(pFile);
				{
					//PERFOR_TEST("复制文件测试4KB_1");
					//CPerforTest test(&liResult);
					fp = fopen(szPath, "ab+");
					while (qwFileSize > 0)
					{
						dwDataLen = qwFileSize < dwBlockBytes ? qwFileSize : dwBlockBytes;
						LPBYTE lpData = (LPBYTE)MapViewOfFile(hFileMap, FILE_MAP_READ | FILE_MAP_WRITE, (DWORD)(qwFileOffset >> 32), (DWORD)(qwFileOffset & 0xffffffff), dwDataLen);
						if (NULL == lpData)
							break;
						//把文件复制到另一个目录下，写文件操作
						//fp = fopen(szPath, "ab+");//追加方式写入文件，不存在则创建
						fwrite(lpData, dwDataLen, 1, fp);
						//fclose(fp);
						UnmapViewOfFile(lpData);
						qwFileOffset += dwDataLen;
						qwFileSize -= dwDataLen;
					}
					fclose(fp);
				}
				//vecTime[i - 1] = liResult.LowPart / 300;
				Sleep(100);
			}
#endif
		__TestEnd:
			DWORD dwError = GetLastError();
			//内核句柄清理工作
			if (hFile != INVALID_HANDLE_VALUE)
			{
				CloseHandle(hFile);
				hFile = INVALID_HANDLE_VALUE;
			}
			if (hFileMap)
			{
				CloseHandle(hFileMap);
				hFileMap = NULL;
			}
#else
			FILE *fp = nullptr;
			fp = _tfopen(TFILE, _T("r"));
			if (fp)
			{
				// 获取文件大小;
				if (0 == fseek(fp, 0, SEEK_END))
				{
					size_t len = ftell(fp);
					fseek(fp, 0, SEEK_SET);

					BYTE *pData = new BYTE[len];
					memset(pData, 0, len);

					fread(pData, len, 1, fp);
					fclose(fp);

					FILE *fp2 = nullptr;
					fp2 = _tfopen(TFILE2, _T("ab+"));
					if (fp2)
					{
						fwrite(pData, len, 1, fp2);
						fclose(fp2);
					}

					delete[]pData;
				}
			}
#endif

			printf("%ld\n", GetTickCount() - dwTickCount);
        }
    }
    else
    {
        // TODO: 更改错误代码以符合您的需要
        wprintf(L"错误: GetModuleHandle 失败\n");
        nRetCode = 1;
    }	

	system("pause");

    return nRetCode;
}