source: trunk/src/network/socket/qabstractsocketengine.cpp@ 754

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**
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** Contact: Nokia Corporation ([email protected])
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** This file is part of the QtNetwork module of the Qt Toolkit.
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#include "qabstractsocketengine_p.h"
#include "qnativesocketengine_p.h"
#include "qmutex.h"
#include "qnetworkproxy.h"

QT_BEGIN_NAMESPACE

class QSocketEngineHandlerList : public QList<QSocketEngineHandler*>
{
public:
    QMutex mutex;
};

Q_GLOBAL_STATIC(QSocketEngineHandlerList, socketHandlers)

QSocketEngineHandler::QSocketEngineHandler()
{
    if (!socketHandlers())
        return;
    QMutexLocker locker(&socketHandlers()->mutex);
    socketHandlers()->prepend(this);
}

QSocketEngineHandler::~QSocketEngineHandler()
{
    if (!socketHandlers())
        return;
    QMutexLocker locker(&socketHandlers()->mutex);
    socketHandlers()->removeAll(this);
}

QAbstractSocketEnginePrivate::QAbstractSocketEnginePrivate()
    : socketError(QAbstractSocket::UnknownSocketError)
    , hasSetSocketError(false)
    , socketErrorString(QLatin1String(QT_TRANSLATE_NOOP(QSocketLayer, "Unknown error")))
    , socketState(QAbstractSocket::UnconnectedState)
    , socketType(QAbstractSocket::UnknownSocketType)
    , socketProtocol(QAbstractSocket::UnknownNetworkLayerProtocol)
    , localPort(0)
    , peerPort(0)
    , receiver(0)
{
}

QAbstractSocketEngine::QAbstractSocketEngine(QObject *parent)
    : QObject(*new QAbstractSocketEnginePrivate(), parent)
{
}

QAbstractSocketEngine::QAbstractSocketEngine(QAbstractSocketEnginePrivate &dd, QObject* parent)
    : QObject(dd, parent)
{
}

QAbstractSocketEngine *QAbstractSocketEngine::createSocketEngine(QAbstractSocket::SocketType socketType, const QNetworkProxy &proxy, QObject *parent)
{
#ifndef QT_NO_NETWORKPROXY
    // proxy type must have been resolved by now
    if (proxy.type() == QNetworkProxy::DefaultProxy)
        return 0;
#endif

    QMutexLocker locker(&socketHandlers()->mutex);
    for (int i = 0; i < socketHandlers()->size(); i++) {
        if (QAbstractSocketEngine *ret = socketHandlers()->at(i)->createSocketEngine(socketType, proxy, parent))
            return ret;
    }

#ifndef QT_NO_NETWORKPROXY
    // only NoProxy can have reached here
    if (proxy.type() != QNetworkProxy::NoProxy)