wince服务编写方法

wince服务与windows pc服务有区别，是将服务写成dll的形式，在注册表中配置项，然后系统自启动时加载.
下面是示例

1. 编写dll文件，实现几个方法

//写日志组件

CSTLogFile* Logger = CSTLogFile::GetLogFile();

// Handle to the worker thread

HANDLE g_hWorkerThread = NULL;
bool m_bRunning = false;


DWORD m_nThreadId = 0;


extern "C" BOOL WINAPI DllEntry(HANDLE hInstDll, DWORD fdwReason, LPVOID lpvReserved) 
{
switch (fdwReason) 
{
case DLL_PROCESS_ATTACH:

break;

case DLL_PROCESS_DETACH:

break;
}
    return TRUE;
}


//服务启动时要做的事,示例中在这里启动写文件线程
extern "C" LIBAPI DWORD FIN_Init(DWORD dwData) 
{
     //初始化
     m_bRunning = true;

     g_hWorkerThread = CreateThread(NULL,0,FingerWorker,NULL,0,(LPDWORD)&m_nThreadId);

     return 1;
}

//停止服务时要做的事情
extern "C" LIBAPI BOOL FIN_Deinit(DWORD dwData) 
{   
    //停止线程
    m_bRunning = false;

    WaitForSingleObject(g_hWorkerThread,INFINITE);

    CloseHandle(g_hWorkerThread);

    g_hWorkerThread = NULL;
    
    return 1;
}

extern "C" LIBAPI DWORD FIN_Open (DWORD dwData, DWORD dwAccess, 
  DWORD dwShareMode)
{
return 1;
}

extern "C" LIBAPI BOOL FIN_Close (DWORD dwData) 
{
return TRUE;
}

extern "C" LIBAPI BOOL FIN_IOControl(DWORD dwData, DWORD dwCode, PBYTE pBufIn,
             DWORD dwLenIn, PBYTE pBufOut, DWORD dwLenOut,
             PDWORD pdwActualOut)
{
        
switch (dwCode) 
{
// Control code sent to start a service.  (services start FIN0:)
case IOCTL_SERVICE_START:

//Logger->Write("IOCTL_SERVICE_START--------\n");

break;

// Control code sent to refresh a service. (services refresh FIN0:)
case IOCTL_SERVICE_REFRESH:

break;

// Control code sent to stop a service.  (services stop FIN0:)
case IOCTL_SERVICE_STOP:

//Logger->Write("IOCTL_SERVICE_STOP--------\n");

break;    

// An application (possibly services.exe itself) is 
// querying for the service's running state.
case IOCTL_SERVICE_STATUS:

break;

default:

;

break;
}
return TRUE;
}

extern "C" LIBAPI DWORD FIN_Read(DWORD dwData,LPVOID pBuff, DWORD dwLen)
{
return 0;
}


extern "C" LIBAPI DWORD FIN_Seek(DWORD dwData,LONG pos,DWORD type)
{
return 0;
}


extern "C" LIBAPI DWORD FIN_Write(DWORD dwData,LPCVOID pInBuf,DWORD dwInLen)
{
return 0;
}

//用于向文件写日志的方式测试
extern "C" DWORD WINAPI FingerWorker(LPVOID lpv)
{
while(m_bRunning)
{
Logger->Write("Test Logs------------\n");
Sleep(5000);
}
return 0;
}


2. 填加注册表项
2.1 
void CRegEditDlg::OnBnClickedButtonWrite()
{
HKEY RootKey = HKEY_LOCAL_MACHINE;
HKEY hKey;
//打开主键，没有则创建
CString strSubKey = _T("\\Services\\FinServ");
DWORD dw;
long nRet = RegCreateKeyEx(RootKey,strSubKey,0,REG_NONE,REG_OPTION_NON_VOLATILE, KEY_WRITE|KEY_READ, NULL,&hKey,&dw);
if(nRet != ERROR_SUCCESS)
{
return;
}
int tsize = sizeof(TCHAR);
//设置键值
LPCTSTR buff = _T("\\Flash Disk\\TestService\\WinCEService.dll");
int length = _tcslen(buff)*tsize;
nRet = RegSetValueEx(hKey,_T("Dll"),0,REG_SZ,(LPBYTE)buff,length);
if(nRet != ERROR_SUCCESS)
{
return;
}

dw = 8;
RegSetValueEx(hKey,_T("Order"),0,REG_DWORD,(LPBYTE)&dw,sizeof(DWORD));
if(nRet != ERROR_SUCCESS)
{
return;
}

dw = 1;
RegSetValueEx(hKey,_T("Keep"),0,REG_DWORD,(LPBYTE)&dw,sizeof(DWORD));
if(nRet != ERROR_SUCCESS)
{
return;
}

buff = _T("FIN");
length = _tcslen(buff)*tsize;
RegSetValueEx(hKey,_T("Prefix"),0,REG_SZ,(LPBYTE)buff,length);
if(nRet != ERROR_SUCCESS)
{
return;
}

dw = 0;
RegSetValueEx(hKey,_T("Index"),0,REG_DWORD,(LPBYTE)&dw,sizeof(DWORD));
if(nRet != ERROR_SUCCESS)
{
return;
}

        dw = 0;
RegSetValueEx(hKey,_T("Context"),0,REG_DWORD,(LPBYTE)&dw,sizeof(DWORD));
if(nRet != ERROR_SUCCESS)
{
return;
}

buff = _T("wince service");
length = _tcslen(buff)*tsize;
RegSetValueEx(hKey,_T("DisplayName"),0,REG_SZ,(LPBYTE)buff,length);
if(nRet != ERROR_SUCCESS)
{
return;
}

buff = _T("Sample Wince Service");
length = _tcslen(buff)*tsize;
RegSetValueEx(hKey,_T("Description"),0,REG_SZ,(LPBYTE)buff,length);
if(nRet != ERROR_SUCCESS)
{
return;
}
}
2.2 删除注册表项
void CRegEditDlg::OnBnClickedButtonDel()
{
HKEY RootKey = HKEY_LOCAL_MACHINE;
CString strSubKey = _T("\\Services\\FinServ");
//找到该键，删除
LONG nRet = RegDeleteKey(RootKey,strSubKey);
if(nRet != ERROR_SUCCESS)
{
MessageBox(_T("删除注册表失败！"));
}
else
{
MessageBox(_T("删除注册表成功！"));
}
}

3. 启动和中止服务(这里是手动停止和中止服务，设置好注册表项和文件后位置后，系统启动时可以自动加载)


3.1 启动服务
HANDLE hService = RegisterService(_T("FIN"),0,_T("\\Flash Disk\\TestService\\WinCEService.dll"),NULL);
if(hService == NULL)
{
CString strMsg;
strMsg.Format(_T("GetLasterror: %d"), GetLastError());
AfxMessageBox(strMsg);
return;
}

注意：注意服务文件的路径，如果在Windows目录可以不指定前面的路径.

3.2 停止服务
void CRegEditDlg::OnBnClickedButtonStop()
{
//停止服务
HANDLE hService = GetServiceHandle(_T("FIN0:"),NULL,NULL);
if(hService !=INVALID_HANDLE_VALUE)
{
DeregisterService(hService);
}
else
{
CString strMsg;
strMsg.Format(_T("GetLasterror: %d"), GetLastError());
AfxMessageBox(strMsg);
}
}