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win/rfb_win32/Service.h

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+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software 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.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Service.h
+//
+// Win32 service-mode code.
+// Derive your service from this code and let it handle the annoying Win32
+// service API.
+
+#ifndef __RFB_WIN32_SERVICE_H__
+#define __RFB_WIN32_SERVICE_H__
+
+#include <windows.h>
+
+namespace rfb {
+
+  namespace win32 {
+
+    //
+    // -=- Service
+    //
+
+    // Application base-class for services.
+
+    class Service {
+    public:
+
+      Service(const TCHAR* name_);
+      virtual ~Service();
+
+      const TCHAR* getName() {return name;}
+      SERVICE_STATUS& getStatus() {return status;}
+
+      void setStatus(DWORD status);
+      void setStatus();
+
+      // - Start the service, having initialised it
+      void start();
+
+      // - Service main procedure - override to implement a service
+      virtual DWORD serviceMain(int argc, TCHAR* argv[]) = 0;
+
+      // - Service control notifications
+
+      // To get notified when the OS is shutting down
+      virtual void osShuttingDown() {};
+
+      // To get notified when the service parameters change
+      virtual void readParams() {};
+
+      // To cause the serviceMain() routine to return
+      virtual void stop() {};
+
+    public:
+      SERVICE_STATUS_HANDLE status_handle;
+      SERVICE_STATUS status;
+    protected:
+      const TCHAR* name;
+    };
+
+    class ServiceHandle {
+    public:
+      ServiceHandle(SC_HANDLE h) : handle(h) {}
+      ~ServiceHandle() {CloseServiceHandle(handle);}
+      operator SC_HANDLE() const {return handle;}
+    protected:
+      SC_HANDLE handle;
+    };
+
+    // -=- Routines used by desktop back-end code to manage desktops/window stations
+
+    bool desktopChangeRequired();
+
+    bool changeDesktop();
+
+    // -=- Routines used by the SInput Keyboard class to emulate Ctrl-Alt-Del
+    bool emulateCtrlAltDel();
+
+    // -=- Routines to initialise the Event Log target Logger
+    bool initEventLogLogger(const TCHAR* srcname);
+
+    // -=- Routines to register/unregister the service
+    //     These routines also take care of registering the required
+    //     event source information, etc.
+    // *** should really accept TCHAR argv
+
+    bool registerService(const TCHAR* name, const TCHAR* display,
+                         const TCHAR* desc, int argc, char** argv);
+    bool unregisterService(const TCHAR* name);
+
+    bool startService(const TCHAR* name);
+    bool stopService(const TCHAR* name);
+
+    // -=- Get the state of the named service (one of the NT service state values)
+    DWORD getServiceState(const TCHAR* name);
+
+    // -=- Convert a supplied service state value to a printable string e.g. Running, Stopped...
+    //     The caller must delete the returned string buffer
+    char* serviceStateName(DWORD state);
+
+    // -=- Routine to determine whether the host process is running a service
+    bool isServiceProcess();
+
+  };
+
+};
+
+#endif // __RFB_WIN32_SERVICE_NT_H__