ReadDirectoryChangesW 监控文件夹 (一个简单的监控示例程序)(文件被修改了,也可以探测到)
- // .h文件
- #pragma once
- typedef void (*PFN_NotifyAction)(DWORD dwAction, LPWSTR szFile, DWORD dwLength);
- class CDirectoryWatch
- {
- public:
- CDirectoryWatch(void);
- virtual ~CDirectoryWatch(void);
- public:
- BOOL StartDirectoryWatch(LPCTSTR lpszDirectory, PFN_NotifyAction pFn_NotifyAction);
- BOOL StopDirectoryWatch(void);
- private:
- static UINT __cdecl ThreadProc(LPVOID lParam);
- static UINT __cdecl DirectoryWatch(LPVOID lParam);
- private:
- HANDLE m_hFile;
- CWinThread* m_pThread;
- TCHAR m_szDirectory[MAX_PATH];
- };
- // .cpp文件
- #include "StdAfx.h"
- #include "DirectoryWatch.h"
- #include <strsafe.h>
- typedef enum
- {
- MSG_STARTWATCH = (WM_USER + 0x11),
- MSG_STOPWATCH,
- MSG_EXITTHREAD
- };
- #define MAX_BUFFER_SIZE (1024)
- typedef struct _tagWATCHPARAMETERS
- {
- _tagWATCHPARAMETERS()
- {
- hFile = INVALID_HANDLE_VALUE;
- hEvent = NULL;
- memset(&ol, 0, sizeof(OVERLAPPED));
- pBuffer = NULL;
- dwBufferSize = 0;
- bExit = FALSE;
- pFn_NotifyAction = NULL;
- }
- HANDLE hFile;
- HANDLE hEvent;
- OVERLAPPED ol;
- BYTE* pBuffer;
- DWORD dwBufferSize;
- BOOL bExit;
- PFN_NotifyAction pFn_NotifyAction;
- }WATCH_PARAMETERS, *PWATCH_PARAMETERS;
- CDirectoryWatch::CDirectoryWatch() : m_hFile(INVALID_HANDLE_VALUE), m_pThread(NULL)
- {
- memset(m_szDirectory, 0, sizeof(m_szDirectory));
- m_pThread = AfxBeginThread(ThreadProc, NULL, 0, CREATE_SUSPENDED, 0, NULL);
- if(NULL == m_pThread)
- {
- TRACE("Error Code : %d\n", GetLastError());
- return ;
- }
- m_pThread->m_bAutoDelete = FALSE;
- m_pThread->ResumeThread();
- }
- CDirectoryWatch::~CDirectoryWatch()
- {
- if(INVALID_HANDLE_VALUE != m_hFile)
- {
- CloseHandle(m_hFile);
- m_hFile = INVALID_HANDLE_VALUE;
- }
- if((NULL != m_pThread) && (NULL != m_pThread->m_hThread))
- {
- m_pThread->PostThreadMessage(MSG_EXITTHREAD, 0, 0);
- WaitForSingleObject(m_pThread->m_hThread, INFINITE);
- delete m_pThread;
- m_pThread = NULL;
- }
- }
- BOOL CDirectoryWatch::StartDirectoryWatch(LPCTSTR lpszDirectory, PFN_NotifyAction pFn_NotifyAction)
- {
- if(NULL == m_pThread)
- {
- return FALSE;
- }
- if(NULL == lpszDirectory)
- {
- return FALSE;
- }
- if(NULL == pFn_NotifyAction)
- {
- return FALSE;
- }
- if(!PathFileExists(lpszDirectory))
- {
- TRACE("Error Code : %d\n", GetLastError());
- return FALSE;
- }
- if(!PathIsDirectory(lpszDirectory))
- {
- TRACE("Error Code : %d\n", GetLastError());
- return FALSE;
- }
- if(0 == _tcslen(m_szDirectory))
- {
- StringCchPrintf(m_szDirectory, _countof(m_szDirectory), _T("%s"), lpszDirectory);
- }
- else if(CSTR_EQUAL != CompareStringOrdinal(m_szDirectory, -1, lpszDirectory, -1, TRUE))
- {
- TRACE("Not Change Directory.\n");
- return FALSE;
- }
- if(INVALID_HANDLE_VALUE == m_hFile)
- {
- m_hFile = CreateFile(lpszDirectory, FILE_LIST_DIRECTORY, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
- NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, NULL);
- if(INVALID_HANDLE_VALUE == m_hFile)
- {
- TRACE("Error Code : %d\n", GetLastError());
- return FALSE;
- }
- }
- return m_pThread->PostThreadMessage(MSG_STARTWATCH, (WPARAM)m_hFile, (LPARAM)pFn_NotifyAction);
- }
- BOOL CDirectoryWatch::StopDirectoryWatch()
- {
- if(NULL != m_pThread)
- {
- return m_pThread->PostThreadMessage(MSG_STOPWATCH, 0, 0);
- }
- return FALSE;
- }
- UINT __cdecl CDirectoryWatch::DirectoryWatch(LPVOID lParam)
- {
- WATCH_PARAMETERS* pParam = (WATCH_PARAMETERS*)lParam;
- if(NULL == pParam)
- {
- return 0;
- }
- HANDLE& hFile = pParam->hFile;
- BYTE* pBuffer = pParam->pBuffer;
- DWORD dwBufferSize = pParam->dwBufferSize;
- OVERLAPPED& ol = pParam->ol;
- HANDLE& hEvent = pParam->hEvent;
- BOOL& bExit = pParam->bExit;
- PFN_NotifyAction pFn_NotifyAction = pParam->pFn_NotifyAction;
- DWORD dwBytesReturn = 0;
- DWORD dwRet = WAIT_FAILED;
- DWORD dwOffSet = 0;
- TCHAR szFile[MAX_PATH] = {0};
- while(TRUE)
- {
- if(WAIT_OBJECT_0 != WaitForSingleObject(hEvent, INFINITE))
- {
- TRACE("Error Code : %d\n", GetLastError());
- break;
- }
- if(bExit)
- {
- break;
- }
- if(!ReadDirectoryChangesW(hFile, pBuffer, dwBufferSize, TRUE,
- FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES
- | FILE_NOTIFY_CHANGE_SIZE | FILE_NOTIFY_CHANGE_LAST_WRITE | FILE_NOTIFY_CHANGE_LAST_ACCESS
- | FILE_NOTIFY_CHANGE_CREATION | FILE_NOTIFY_CHANGE_SECURITY, &dwBytesReturn, &ol, NULL))
- {
- TRACE("Error Code : %d\n", GetLastError());
- break;
- }
- if(!GetOverlappedResult(hFile, &ol, &dwBytesReturn, TRUE))
- {
- TRACE("Error Code : %d\n", GetLastError());
- break;
- }
- FILE_NOTIFY_INFORMATION* pFileNotify = (FILE_NOTIFY_INFORMATION*)pBuffer;
- do
- {
- if(pFn_NotifyAction && (WAIT_OBJECT_0 == WaitForSingleObject(hEvent, 0)))
- {
- pFn_NotifyAction(pFileNotify->Action, pFileNotify->FileName, (pFileNotify->FileNameLength) / sizeof(WCHAR));
- }
- dwOffSet = pFileNotify->NextEntryOffset;
- pFileNotify = (FILE_NOTIFY_INFORMATION*)((BYTE*)pFileNotify + dwOffSet);
- } while (dwOffSet);
- }
- TRACE0("DirectoryWatch Thread Exit ... \n");
- return 0;
- }
- UINT __cdecl CDirectoryWatch::ThreadProc(LPVOID lParam)
- {
- WATCH_PARAMETERS* pParam = new WATCH_PARAMETERS;
- if(NULL == pParam)
- {
- goto __CLEANUP__;
- }
- BYTE* pBuffer = new BYTE[MAX_BUFFER_SIZE];
- if(NULL == pBuffer)
- {
- goto __CLEANUP__;
- }
- memset(pBuffer, 0, MAX_BUFFER_SIZE);
- pParam->pBuffer = pBuffer;
- pParam->dwBufferSize = MAX_BUFFER_SIZE;
- HANDLE hWatchEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
- if(NULL == hWatchEvent)
- {
- goto __CLEANUP__;
- }
- pParam->ol.hEvent = hWatchEvent;
- CWinThread* pThread = NULL;
- HANDLE hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
- if(NULL == hEvent)
- {
- goto __CLEANUP__;
- }
- pParam->hEvent = hEvent;
- MSG msg;
- while(GetMessage(&msg, NULL, 0, 0))
- {
- switch(msg.message)
- {
- case MSG_STARTWATCH:
- {
- HANDLE hFile = (HANDLE)(msg.wParam);
- PFN_NotifyAction pFn_NotifyAction = (PFN_NotifyAction)(msg.lParam);
- if((INVALID_HANDLE_VALUE == hFile) && (NULL == pFn_NotifyAction))
- {
- break;
- }
- if(NULL == pThread)
- {
- pParam->hFile = hFile;
- pParam->pFn_NotifyAction = pFn_NotifyAction;
- pThread = AfxBeginThread(DirectoryWatch, (LPVOID)pParam, 0, CREATE_SUSPENDED, NULL);
- if(NULL == pThread)
- {
- goto __CLEANUP__;
- }
- pThread->m_bAutoDelete = FALSE;
- pThread->ResumeThread();
- }
- SetEvent(hEvent);
- }
- break;
- case MSG_STOPWATCH:
- {
- ResetEvent(hEvent);
- }
- break;
- case MSG_EXITTHREAD:
- {
- SetEvent(hEvent);
- pParam->bExit = FALSE;
- if((NULL != pThread) && (NULL != pThread->m_hThread))
- {
- WaitForSingleObject(pThread->m_hThread, INFINITE);
- delete pThread;
- pThread = NULL;
- }
- goto __CLEANUP__;
- }
- default:
- break;
- }
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- __CLEANUP__:
- if(NULL != hWatchEvent)
- {
- CloseHandle(hWatchEvent);
- hWatchEvent = NULL;
- }
- if(NULL != pBuffer)
- {
- delete[] pBuffer;
- pBuffer = NULL;
- }
- if(NULL != pParam)
- {
- delete pParam;
- pParam = NULL;
- }
- TRACE0("ThreadProc Thread Exit ...\n");
- return 0;
- }
- // 测试代码
- #include "stdafx.h"
- #include "DirectoryWatch.h"
- void NotifyAction(DWORD dwAction, LPWSTR szFile, DWORD dwLength)
- {
- switch(dwAction)
- {
- case FILE_ACTION_ADDED:
- wprintf(L"FILE_ACTION_ADDED: \n\t");
- break;
- case FILE_ACTION_REMOVED:
- wprintf(L"FILE_ACTION_REMOVED: \n\t");
- break;
- case FILE_ACTION_MODIFIED:
- wprintf(L"FILE_ACTION_MODIFIED: \n\t");
- break;
- case FILE_ACTION_RENAMED_OLD_NAME:
- wprintf(L"FILE_ACTION_RENAMED_OLD_NAME: \n\t");
- break;
- case FILE_ACTION_RENAMED_NEW_NAME:
- wprintf(L"FILE_ACTION_RENAMED_NEW_NAME: \n\t");
- break;
- default:
- break;
- }
- WCHAR szPath[MAX_PATH] = {0};
- wmemcpy(szPath, szFile, min(dwLength, MAX_PATH));
- wprintf(L"%s\n", szPath);
- }
- int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
- {
- CDirectoryWatch watch;
- wprintf(L"Start Directory Watch ...\n");
- watch.StartDirectoryWatch(_T("F:\\11"), NotifyAction);
- Sleep(30 * 1000);
- watch.StopDirectoryWatch();
- wprintf(L"Stop Directory Watch ...\n");
- Sleep(10 * 1000);
- wprintf(L"Start Directory Watch ...\n");
- watch.StartDirectoryWatch(_T("F:\\11"), NotifyAction);
- Sleep(30 * 1000);
- watch.StopDirectoryWatch();
- wprintf(L"Stop Directory Watch ...\n");
- Sleep(30 * 1000);
- wprintf(L"Process Exit ...\n");
- return 0;
- }
效果如下图所示:
http://blog.csdn.net/visualeleven/article/details/7562014
ReadDirectoryChangesW 监控文件夹 (一个简单的监控示例程序)(文件被修改了,也可以探测到)的更多相关文章
- gulp插件实现压缩一个文件夹下不同目录下的js文件(支持es6)
gulp-uglify:压缩js大小,只支持es5 安装: cnpm: cnpm i gulp-uglify -D yarn: yarn add gulp-uglify -D 使用: 代码实现1:压缩 ...
- META-INF文件夹是干啥的,META-INF文件夹的作用, META-INF文件夹能删吗
今天有人问到 META-INF文件夹是干啥的,META-INF文件夹的作用, META-INF文件夹能删吗,还有项目的META-INF下面一般会有个MANIFEST.MF 文件,都是干啥的. 百度搜了 ...
- selector是在文件夹drawable中进行定义的xml文件。
获取Drawable对象: Resources res = mContext.getResources(); Drawable myImage = res.getDrawable(R.drawable ...
- 导出不带.svn的文件夹或者是不含.class的文件
转载自:http://blog.csdn.net/z278718149/article/details/21537395 如何导出不带.svn的文件夹或者是不含.class的文件 在工作环境中,有的时 ...
- selector是在文件夹drawable中进行定义的xml文件转载 https://www.cnblogs.com/fx2008/p/3157040.html
获取Drawable对象: Resources res = mContext.getResources(); Drawable myImage = res.getDrawable(R.drawable ...
- 一个简单的P2P传输程序
写了一个简单的P2P传输程序,在P2P的圈子中传输文件,不过为了简便,这个程序没有真正的传输文件,只是简单的判断一下文件的位置在哪里.这个程序可以处理当有一个peer闪退的情况,在这种情况下,剩下的p ...
- Android加载SD卡目录,文件夹遍历,图片设置,设置文件对应打开方式等
此案例主要说的是Android使用GridView加载SD卡下所有目录,文件夹多层遍历,文件图标修改,设置文件对应打开方式等功能. 如图: 代码: public class GridViewFile ...
- IOS开发之小实例--使用UIImagePickerController创建一个简单的相机应用程序
前言:本篇博文是本人阅读国外的IOS Programming Tutorial的一篇入门文章的学习过程总结,难度不大,因为是入门.主要是入门UIImagePickerController这个控制器,那 ...
- iOS开发UI篇—使用嵌套模型完成的一个简单汽车图标展示程序
iOS开发UI篇—使用嵌套模型完成的一个简单汽车图标展示程序 一.plist文件和项目结构图 说明:这是一个嵌套模型的示例 二.代码示例: YYcarsgroup.h文件代码: // // YYcar ...
随机推荐
- 水面波浪形View--第三方开源--WaveView(电量、能量、容量指示)
这种WaveView在一些常见的APP开发中,以水面波浪波形的形象的生动展示手机还剩余多少电量,存储容量还有多少,比较形象直观生动. WaveView在github上的项目主页是:https://gi ...
- js各类共用方法
function GetParameterValueByName(parametername) { var reg = new RegExp("(^|&)" + param ...
- js关闭页面(兼容浏览器)
function closewindow() { window.opener = null; window.open("", "_self"); window. ...
- 边界函数Bounding Function(成长函数的上界)
根据成长函数的定义,猜测 -->break point K restricts maximum possible mh(N) a lot for N>k bounding funct ...
- 【转】 管理CPU 亲和性
简单地说,CPU 亲和性(affinity) 就是进程要在某个给定的 CPU 上尽量长时间地运行而不被迁移到其他处理器的倾向性.Linux 内核进程调度器天生就具有被称为 软 CPU 亲和性(affi ...
- vs2010的11个调试技巧和方法
调试是软件开发周期中很重要的一部分.它具有挑战性,同时也很让人疑惑和烦恼.总的来说,对于稍大一点的程序,调试是不可避免的.最近几年,调试工具的发展让很多调试任务变的越来越简单和省时. 这篇文章总结了可 ...
- Java 图形编程 二:布局管理器之顺序布局
package second; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.Window ...
- php中调用用户自定义函数的方法:call_user_func,call_user_func_array
看UCenter的时候有一个函数call_user_func,百思不得其解,因为我以为是自己定义的函数,结果到处都找不到,后来百度了一下才知道call_user_func是内置函数,该函数允许用户调用 ...
- 101个MySQL的调节和优化的Tips
MySQL 是一个功能强大的开源数据库.随着越来越多的数据库驱动的应用程序,人们一直在推动MySQL发展到它的极限.这里是101条调节和优化MySQL安装的技巧.一些技巧是针对特定的安装环境的,但这些 ...
- java并发编程(一)
多个线程访问同一个变量时,可能会出现问题.这里我用两个线程同时访问一个int count变量,让他们同时+1.同时让线程睡眠1秒,每个线程执行10次,最后应该输出20才对,因为count++并不是原子 ...