source: trunk/synergy/lib/arch/CArchDaemonWindows.h@ 3848

/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2002 Chris Schoeneman
 * 
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file COPYING that should have accompanied this file.
 * 
 * This package is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef CARCHDAEMONWINDOWS_H
#define CARCHDAEMONWINDOWS_H

#define WIN32_LEAN_AND_MEAN

#include "IArchDaemon.h"
#include "IArchMultithread.h"
#include "stdstring.h"
#include <windows.h>
#include <tchar.h>

#define ARCH_DAEMON CArchDaemonWindows

//! Win32 implementation of IArchDaemon
class CArchDaemonWindows : public IArchDaemon {
public:
        typedef int                     (*RunFunc)(void);

        CArchDaemonWindows();
        virtual ~CArchDaemonWindows();

        //! Run the daemon
        /*!
        When the client calls \c daemonize(), the \c DaemonFunc should call this
        function after initialization and argument parsing to perform the
        daemon processing.  The \c runFunc should perform the daemon's
        main loop, calling \c daemonRunning(true) when it enters the main loop
        (i.e. after initialization) and \c daemonRunning(false) when it leaves
        the main loop.  The \c runFunc is called in a new thread and when the
        daemon must exit the main loop due to some external control the
        getDaemonQuitMessage() is posted to the thread.  This function returns
        what \c runFunc returns.  \c runFunc should call \c daemonFailed() if
        the daemon fails.
        */
        static int                      runDaemon(RunFunc runFunc);

        //! Indicate daemon is in main loop
        /*!
        The \c runFunc passed to \c runDaemon() should call this function
        to indicate when it has entered (\c running is \c true) or exited
        (\c running is \c false) the main loop.
        */
        static void                     daemonRunning(bool running);

        //! Indicate failure of running daemon
        /*!
        The \c runFunc passed to \c runDaemon() should call this function
        to indicate failure.  \c result is returned by \c daemonize().
        */
        static void                     daemonFailed(int result);

        //! Get daemon quit message
        /*!
        The windows NT daemon tells daemon thread to exit by posting this
        message to it.  The thread must, of course, have a message queue
        for this to work.
        */
        static UINT                     getDaemonQuitMessage();

        // IArchDaemon overrides
        virtual void            installDaemon(const char* name,
                                                        const char* description,
                                                        const char* pathname,
                                                        const char* commandLine,
                                                        const char* dependencies,
                                                        bool allUsers);
        virtual void            uninstallDaemon(const char* name, bool allUsers);
        virtual int                     daemonize(const char* name, DaemonFunc func);
        virtual bool            canInstallDaemon(const char* name, bool allUsers);
        virtual bool            isDaemonInstalled(const char* name, bool allUsers);

private:
        static HKEY                     openNTServicesKey();
        static HKEY                     open95ServicesKey();
        static HKEY                     openUserStartupKey();

        int                                     doRunDaemon(RunFunc runFunc);
        void                            doDaemonRunning(bool running);
        UINT                            doGetDaemonQuitMessage();

        static void                     setStatus(DWORD state);
        static void                     setStatus(DWORD state, DWORD step, DWORD waitHint);
        static void                     setStatusError(DWORD error);

        static bool                     isRunState(DWORD state);

        void                            serviceMain(DWORD, LPTSTR*);
        static void WINAPI      serviceMainEntry(DWORD, LPTSTR*);

        void                            serviceHandler(DWORD ctrl);
        static void WINAPI      serviceHandlerEntry(DWORD ctrl);

private:
        class XArchDaemonRunFailed {
        public:
                XArchDaemonRunFailed(int result) : m_result(result) { }

        public:
                int                             m_result;
        };

private:
        static CArchDaemonWindows*      s_daemon;

        CArchMutex                      m_serviceMutex;
        CArchCond                       m_serviceCondVar;
        DWORD                           m_serviceState;
        bool                            m_serviceHandlerWaiting;
        bool                            m_serviceRunning;

        DWORD                           m_daemonThreadID;
        DaemonFunc                      m_daemonFunc;
        int                                     m_daemonResult;

        SERVICE_STATUS_HANDLE m_statusHandle;

        UINT                            m_quitMessage;
};

#endif