source: trunk/src/network/socket/qlocalserver.cpp@ 182

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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

    \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.

    Note that this feature is not supported on Windows 9x.

    \sa QLocalSocket, QTcpServer
*/

/*!
    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();
}

/*!
    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 = QString();
    d->fullServerName = QString();
    d->errorString = QString();
    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 true if the server has a pending connection; otherwise
    returns 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.