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  #include "qlocalserver.h"
  #include "qlocalserver_p.h"
  #include "qlocalsocket.h"
  
  QT_BEGIN_NAMESPACE
  
  #ifndef QT_NO_LOCALSERVER
  
  /*!
      \class QLocalServer
      \since 4.4
      \inmodule QtNetwork
  
      \brief The QLocalServer class provides a local socket based server.
  
      This class makes it possible to accept incoming local socket
      connections.
  
      Call listen() to have the server start listening
      for incoming connections on a specified key.  The
      newConnection() signal is then emitted each time a client
      connects to the server.
  
      Call nextPendingConnection() to accept the pending connection
      as a connected QLocalSocket.  The function returns a pointer to a
      QLocalSocket that can be used for communicating with the client.
  
      If an error occurs, serverError() returns the type of error, and
      errorString() can be called to get a human readable description
      of what happened.
  
      When listening for connections, the name which the server is
      listening on is available through serverName().
  
      Calling close() makes QLocalServer stop listening for incoming connections.
  
      Although QLocalServer is designed for use with an event loop, it's possible
      to use it without one. In that case, you must use waitForNewConnection(),
      which blocks until either a connection is available or a timeout expires.
  
      \sa QLocalSocket, QTcpServer
  */
  
  /*!
      \enum QLocalServer::SocketOption
      \since 5.0
  
      This enum describes the possible options that can be used to create the
      socket. This changes the access permissions on platforms (Linux, Windows)
      that support access permissions on the socket. Both GroupAccess and OtherAccess
      may vary slightly in meanings depending on the platform.
  
      \value NoOptions No access restrictions have been set.
      \value UserAccessOption
      Access is restricted to the same user as the process that created the socket.
      \value GroupAccessOption
      Access is restricted to the same group but not the user that created the socket on Linux.
      Access is restricted to the primary group of the process on Windows
      \value OtherAccessOption
      Access is available to everyone but the user and group that created the socket on Linux.
      Access is available to everyone on Windows.
      \value WorldAccessOption
      No access restrictions.
  
      \sa socketOptions
  */
  
  
  /*!
      Create a new local socket server with the given \a parent.
  
      \sa listen()
   */
  QLocalServer::QLocalServer(QObject *parent)
          : QObject(*new QLocalServerPrivate, parent)
  {
      Q_D(QLocalServer);
      d->init();
  }
  
  /*!
      Destroys the QLocalServer object.  If the server is listening for
      connections, it is automatically closed.
  
      Any client QLocalSockets that are still connected must either
      disconnect or be reparented before the server is deleted.
  
      \sa close()
   */
  QLocalServer::~QLocalServer()
  {
      if (isListening())
          close();
  }
  
  /*!
      \property QLocalServer::socketOptions
      \since 5.0
  
      The setSocketOptions method controls how the socket operates.
      For example the socket may restrict access to what user ids can
      connect to the socket.
  
      These options must be set before listen() is called.
  
      In some cases, such as with Unix domain sockets on Linux, the
      access to the socket will be determined by file system permissions,
      and are created based on the umask. Setting the access flags will
      overide this and will restrict or permit access as specified.
  
      Other Unix-based operating systems, such as Mac OS X, do not
      honor file permissions for Unix domain sockets and by default
      have WorldAccess and these permission flags will have no effect.
  
      On Windows, UserAccessOption is sufficient to allow a non
      elevated process to connect to a local server created by an
      elevated process run by the same user. GroupAccessOption
      refers to the primary group of the process (see TokenPrimaryGroup
      in the Windows documentation). OtherAccessOption refers to
      the well known "Everyone" group.
  
      By default none of the flags are set, access permissions
      are the platform default.
  
      \sa listen()
  */
  void QLocalServer::setSocketOptions(SocketOptions options)
  {
      Q_D(QLocalServer);
  
      d->socketOptions = options;
  }
  
  /*!
      \since 5.0
      Returns the socket options set on the socket.
  
      \sa setSocketOptions()
   */
  QLocalServer::SocketOptions QLocalServer::socketOptions() const
  {
      Q_D(const QLocalServer);
      return d->socketOptions;
  }
  
  /*!
      Stop listening for incoming connections.  Existing connections are not
      effected, but any new connections will be refused.
  
      \sa isListening(), listen()
   */
  void QLocalServer::close()
  {
      Q_D(QLocalServer);
      if (!isListening())
          return;
      qDeleteAll(d->pendingConnections);
      d->pendingConnections.clear();
      d->closeServer();
      d->serverName.clear();
      d->fullServerName.clear();
      d->errorString.clear();
      d->error = QAbstractSocket::UnknownSocketError;
  }
  
  /*!
      Returns the human-readable message appropriate to the current error
      reported by serverError(). If no suitable string is available, an empty
      string is returned.
  
      \sa serverError()
   */
  QString QLocalServer::errorString() const
  {
      Q_D(const QLocalServer);
      return d->errorString;
  }
  
  /*!
      Returns \c true if the server has a pending connection; otherwise
      returns \c false.
  
      \sa nextPendingConnection(), setMaxPendingConnections()
   */
  bool QLocalServer::hasPendingConnections() const
  {
      Q_D(const QLocalServer);
      return !(d->pendingConnections.isEmpty());
  }
  
  /*!
      This virtual function is called by QLocalServer when a new connection
      is available. \a socketDescriptor is the native socket descriptor for
      the accepted connection.
  
      The base implementation creates a QLocalSocket, sets the socket descriptor
      and then stores the QLocalSocket in an internal list of pending
      connections. Finally newConnection() is emitted.
  
      Reimplement this function to alter the server's behavior
      when a connection is available.
  
      \sa newConnection(), nextPendingConnection(),
      QLocalSocket::setSocketDescriptor()
   */
  void QLocalServer::incomingConnection(quintptr socketDescriptor)
  {
      Q_D(QLocalServer);
      QLocalSocket *socket = new QLocalSocket(this);
      socket->setSocketDescriptor(socketDescriptor);
      d->pendingConnections.enqueue(socket);
      emit newConnection();
  }
  
  /*!
      Returns \c true if the server is listening for incoming connections
      otherwise false.
  
      \sa listen(), close()
   */
  bool QLocalServer::isListening() const
  {
      Q_D(const QLocalServer);
      return !(d->serverName.isEmpty());
  }
  
  /*!
      Tells the server to listen for incoming connections on \a name.
      If the server is currently listening then it will return false.
      Return true on success otherwise false.
  
      \a name can be a single name and QLocalServer will determine
      the correct platform specific path.  serverName() will return
      the name that is passed into listen.
  
      Usually you would just pass in a name like "foo", but on Unix this
      could also be a path such as "/tmp/foo" and on Windows this could
      be a pipe path such as "\\\\.\\pipe\\foo"
  
      \note On Unix if the server crashes without closing listen will fail
      with AddressInUseError.  To create a new server the file should be removed.
      On Windows two local servers can listen to the same pipe at the same
      time, but any connections will go to one of the server.
  
      \sa serverName(), isListening(), close()
   */
  bool QLocalServer::listen(const QString &name)
  {
      Q_D(QLocalServer);
      if (isListening()) {
          qWarning("QLocalServer::listen() called when already listening");
          return false;
      }
  
      if (name.isEmpty()) {
          d->error = QAbstractSocket::HostNotFoundError;
          QString function = QLatin1String("QLocalServer::listen");
          d->errorString = tr("%1: Name error").arg(function);
          return false;
      }
  
      if (!d->listen(name)) {
          d->serverName.clear();
          d->fullServerName.clear();
          return false;
      }
  
      d->serverName = name;
      return true;
  }
  
  /*!
      \since 5.0
  
      Instructs the server to listen for incoming connections on
      \a socketDescriptor. The property returns \c false if the server is
      currently listening. It returns \c true on success; otherwise,
      it returns \c false. The socket must be ready to accept
      new connections with no extra platform-specific functions
      called. The socket is set into non-blocking mode.
  
      serverName(), fullServerName() may return a string with
      a name if this option is supported by the platform;
      otherwise, they return an empty QString.
  
      \sa isListening(), close()
   */
  bool QLocalServer::listen(qintptr socketDescriptor)
  {
      Q_D(QLocalServer);
      if (isListening()) {
          qWarning("QLocalServer::listen() called when already listening");
          return false;
      }
  
      d->serverName.clear();
      d->fullServerName.clear();
  
      if (!d->listen(socketDescriptor)) {
          return false;
      }
  
      return true;
  }
  
  /*!
      Returns the maximum number of pending accepted connections.
      The default is 30.
  
      \sa setMaxPendingConnections(), hasPendingConnections()
   */
  int QLocalServer::maxPendingConnections() const
  {
      Q_D(const QLocalServer);
      return d->maxPendingConnections;
  }
  
  /*!
      \fn void QLocalServer::newConnection()
  
      This signal is emitted every time a new connection is available.
  
      \sa hasPendingConnections(), nextPendingConnection()
  */
  
  /*!
      Returns the next pending connection as a connected QLocalSocket object.
  
      The socket is created as a child of the server, which means that it is
      automatically deleted when the QLocalServer object is destroyed. It is
      still a good idea to delete the object explicitly when you are done with
      it, to avoid wasting memory.
  
      0 is returned if this function is called when there are no pending
      connections.
  
      \sa hasPendingConnections(), newConnection(), incomingConnection()
   */
  QLocalSocket *QLocalServer::nextPendingConnection()
  {
      Q_D(QLocalServer);
      if (d->pendingConnections.isEmpty())
          return 0;
      QLocalSocket *nextSocket = d->pendingConnections.dequeue();
  #ifndef QT_LOCALSOCKET_TCP
      if (d->pendingConnections.size() <= d->maxPendingConnections)
  #ifndef Q_OS_WIN
          d->socketNotifier->setEnabled(true);
  #else
          d->connectionEventNotifier->setEnabled(true);
  #endif
  #endif
      return nextSocket;
  }
  
  /*!
      \since 4.5
  
      Removes any server instance that might cause a call to listen() to fail
      and returns \c true if successful; otherwise returns \c false.
      This function is meant to recover from a crash, when the previous server
      instance has not been cleaned up.
  
      On Windows, this function does nothing; on Unix, it removes the socket file
      given by \a name.
  
      \warning Be careful to avoid removing sockets of running instances.
  */
  bool QLocalServer::removeServer(const QString &name)
  {
      return QLocalServerPrivate::removeServer(name);
  }
  
  /*!
      Returns the server name if the server is listening for connections;
      otherwise returns QString()
  
      \sa listen(), fullServerName()
   */
  QString QLocalServer::serverName() const
  {
      Q_D(const QLocalServer);
      return d->serverName;
  }
  
  /*!
      Returns the full path that the server is listening on.
  
      Note: This is platform specific
  
      \sa listen(), serverName()
   */
  QString QLocalServer::fullServerName() const
  {
      Q_D(const QLocalServer);
      return d->fullServerName;
  }
  
  /*!
      Returns the type of error that occurred last or NoError.
  
      \sa errorString()
   */
  QAbstractSocket::SocketError QLocalServer::serverError() const
  {
      Q_D(const QLocalServer);
      return d->error;
  }
  
  /*!
      Sets the maximum number of pending accepted connections to
      \a numConnections.  QLocalServer will accept no more than
      \a numConnections incoming connections before nextPendingConnection()
      is called.
  
      Note: Even though QLocalServer will stop accepting new connections
      after it has reached its maximum number of pending connections,
      the operating system may still keep them in queue which will result
      in clients signaling that it is connected.
  
      \sa maxPendingConnections(), hasPendingConnections()
   */
  void QLocalServer::setMaxPendingConnections(int numConnections)
  {
      Q_D(QLocalServer);
      d->maxPendingConnections = numConnections;
  }
  
  /*!
      Waits for at most \a msec milliseconds or until an incoming connection
      is available.  Returns \c true if a connection is available; otherwise
      returns \c false.  If the operation timed out and \a timedOut is not 0,
      *timedOut will be set to true.
  
      This is a blocking function call. Its use is ill-advised in a
      single-threaded GUI application, since the whole application will stop
      responding until the function returns. waitForNewConnection() is mostly
      useful when there is no event loop available.
  
      The non-blocking alternative is to connect to the newConnection() signal.
  
      If msec is -1, this function will not time out.
  
      \sa hasPendingConnections(), nextPendingConnection()
   */
  bool QLocalServer::waitForNewConnection(int msec, bool *timedOut)
  {
      Q_D(QLocalServer);
      if (timedOut)
          *timedOut = false;
  
      if (!isListening())
          return false;
  
      d->waitForNewConnection(msec, timedOut);
  
      return !d->pendingConnections.isEmpty();
  }
  
  #endif
  
  QT_END_NAMESPACE
  
  #include "moc_qlocalserver.cpp"
  
  