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tdelibs/tdecore/network/kbufferedsocket.cpp

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/*
* Copyright (C) 2003-2005 Thiago Macieira <thiago.macieira@kdemail.net>
*
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <config.h>
#include <tqmutex.h>
#include <tqtimer.h>
#include "tdesocketdevice.h"
#include "tdesocketaddress.h"
#include "tdesocketbuffer_p.h"
#include "kbufferedsocket.h"
using namespace KNetwork;
using namespace KNetwork::Internal;
class KNetwork::TDEBufferedSocketPrivate
{
public:
mutable TDESocketBuffer *input, *output;
TDEBufferedSocketPrivate()
{
input = 0L;
output = 0L;
}
};
TDEBufferedSocket::TDEBufferedSocket(const TQString& host, const TQString& service,
TQObject *parent, const char *name)
: KStreamSocket(host, service, parent, name),
d(new TDEBufferedSocketPrivate)
{
setInputBuffering(true);
setOutputBuffering(true);
}
TDEBufferedSocket::~TDEBufferedSocket()
{
closeNow();
delete d->input;
delete d->output;
delete d;
}
void TDEBufferedSocket::setSocketDevice(TDESocketDevice* device)
{
KStreamSocket::setSocketDevice(device);
device->setBlocking(false);
}
bool TDEBufferedSocket::setSocketOptions(int opts)
{
if (opts == Blocking)
return false;
opts &= ~Blocking;
return KStreamSocket::setSocketOptions(opts);
}
void TDEBufferedSocket::close()
{
if (!d->output || d->output->isEmpty())
closeNow();
else
{
setState(Closing);
TQSocketNotifier *n = socketDevice()->readNotifier();
if (n)
n->setEnabled(false);
emit stateChanged(Closing);
}
}
TQ_LONG TDEBufferedSocket::bytesAvailable() const
{
if (!d->input)
return KStreamSocket::bytesAvailable();
return d->input->length();
}
TQ_LONG TDEBufferedSocket::waitForMore(int msecs, bool *timeout)
{
TQ_LONG retval = KStreamSocket::waitForMore(msecs, timeout);
if (d->input)
{
resetError();
slotReadActivity();
return bytesAvailable();
}
return retval;
}
TQ_LONG TDEBufferedSocket::readBlock(char *data, TQ_ULONG maxlen)
{
if (d->input)
{
if (d->input->isEmpty())
{
setError(IO_ReadError, WouldBlock);
emit gotError(WouldBlock);
return -1;
}
resetError();
return d->input->consumeBuffer(data, maxlen);
}
return KStreamSocket::readBlock(data, maxlen);
}
TQ_LONG TDEBufferedSocket::readBlock(char *data, TQ_ULONG maxlen, TDESocketAddress& from)
{
from = peerAddress();
return readBlock(data, maxlen);
}
TQ_LONG TDEBufferedSocket::peekBlock(char *data, TQ_ULONG maxlen)
{
if (d->input)
{
if (d->input->isEmpty())
{
setError(IO_ReadError, WouldBlock);
emit gotError(WouldBlock);
return -1;
}
resetError();
return d->input->consumeBuffer(data, maxlen, false);
}
return KStreamSocket::peekBlock(data, maxlen);
}
TQ_LONG TDEBufferedSocket::peekBlock(char *data, TQ_ULONG maxlen, TDESocketAddress& from)
{
from = peerAddress();
return peekBlock(data, maxlen);
}
TQ_LONG TDEBufferedSocket::writeBlock(const char *data, TQ_ULONG len)
{
if (state() != Connected)
{
// cannot write now!
setError(IO_WriteError, NotConnected);
return -1;
}
if (d->output)
{
if (d->output->isFull())
{
setError(IO_WriteError, WouldBlock);
emit gotError(WouldBlock);
return -1;
}
resetError();
// enable notifier to send data
TQSocketNotifier *n = socketDevice()->writeNotifier();
if (n)
n->setEnabled(true);
return d->output->feedBuffer(data, len);
}
return KStreamSocket::writeBlock(data, len);
}
TQ_LONG TDEBufferedSocket::writeBlock(const char *data, TQ_ULONG maxlen,
const TDESocketAddress&)
{
// ignore the third parameter
return writeBlock(data, maxlen);
}
void TDEBufferedSocket::enableRead(bool enable)
{
KStreamSocket::enableRead(enable);
if (!enable && d->input)
{
// reenable it
TQSocketNotifier *n = socketDevice()->readNotifier();
if (n)
n->setEnabled(true);
}
if (enable && state() != Connected && d->input && !d->input->isEmpty())
// this means the buffer is still dirty
// allow the signal to be emitted
TQTimer::singleShot(0, this, TQ_SLOT(slotReadActivity()));
}
void TDEBufferedSocket::enableWrite(bool enable)
{
KStreamSocket::enableWrite(enable);
if (!enable && d->output && !d->output->isEmpty())
{
// reenable it
TQSocketNotifier *n = socketDevice()->writeNotifier();
if (n)
n->setEnabled(true);
}
}
void TDEBufferedSocket::stateChanging(SocketState newState)
{
if (newState == Connecting || newState == Connected)
{
// we're going to connect
// make sure the buffers are clean
if (d->input)
d->input->clear();
if (d->output)
d->output->clear();
// also, turn on notifiers
enableRead(emitsReadyRead());
enableWrite(emitsReadyWrite());
}
KStreamSocket::stateChanging(newState);
}
void TDEBufferedSocket::setInputBuffering(bool enable)
{
TQMutexLocker locker(mutex());
if (!enable)
{
delete d->input;
d->input = 0L;
}
else if (d->input == 0L)
{
d->input = new TDESocketBuffer;
}
}
TDEIOBufferBase* TDEBufferedSocket::inputBuffer()
{
return d->input;
}
void TDEBufferedSocket::setOutputBuffering(bool enable)
{
TQMutexLocker locker(mutex());
if (!enable)
{
delete d->output;
d->output = 0L;
}
else if (d->output == 0L)
{
d->output = new TDESocketBuffer;
}
}
TDEIOBufferBase* TDEBufferedSocket::outputBuffer()
{
return d->output;
}
TQ_ULONG TDEBufferedSocket::bytesToWrite() const
{
if (!d->output)
return 0;
return d->output->length();
}
void TDEBufferedSocket::closeNow()
{
KStreamSocket::close();
if (d->output)
d->output->clear();
}
bool TDEBufferedSocket::canReadLine() const
{
if (!d->input)
return false;
return d->input->canReadLine();
}
TQCString TDEBufferedSocket::readLine()
{
return d->input->readLine();
}
void TDEBufferedSocket::waitForConnect()
{
if (state() != Connecting)
return; // nothing to be waited on
KStreamSocket::setSocketOptions(socketOptions() | Blocking);
connectionEvent();
KStreamSocket::setSocketOptions(socketOptions() & ~Blocking);
}
void TDEBufferedSocket::slotReadActivity()
{
if (d->input && state() == Connected)
{
mutex()->lock();
TQ_LONG len = d->input->receiveFrom(socketDevice());
if (len == -1)
{
if (socketDevice()->error() != WouldBlock)
{
// nope, another error!
copyError();
mutex()->unlock();
emit gotError(error());
closeNow(); // emits closed
return;
}
}
else if (len == 0)
{
// remotely closed
setError(IO_ReadError, RemotelyDisconnected);
mutex()->unlock();
emit gotError(error());
closeNow(); // emits closed
return;
}
// no error
mutex()->unlock();
}
if (state() == Connected)
KStreamSocket::slotReadActivity(); // this emits readyRead
else if (emitsReadyRead()) // state() != Connected
{
if (d->input && !d->input->isEmpty())
{
// buffer isn't empty
// keep emitting signals till it is
TQTimer::singleShot(0, this, TQ_SLOT(slotReadActivity()));
emit readyRead();
}
}
}
void TDEBufferedSocket::slotWriteActivity()
{
if (d->output && !d->output->isEmpty() &&
(state() == Connected || state() == Closing))
{
mutex()->lock();
TQ_LONG len = d->output->sendTo(socketDevice());
if (len == -1)
{
if (socketDevice()->error() != WouldBlock)
{
// nope, another error!
copyError();
mutex()->unlock();
emit gotError(error());
closeNow();
return;
}
}
else if (len == 0)
{
// remotely closed
setError(IO_ReadError, RemotelyDisconnected);
mutex()->unlock();
emit gotError(error());
closeNow();
return;
}
if (d->output->isEmpty())
// deactivate the notifier until we have something to send
// writeNotifier can't return NULL here
socketDevice()->writeNotifier()->setEnabled(false);
mutex()->unlock();
emit bytesWritten(len);
}
if (state() != Closing)
KStreamSocket::slotWriteActivity();
else if (d->output && d->output->isEmpty() && state() == Closing)
{
KStreamSocket::close(); // finished sending data
}
}
#include "kbufferedsocket.moc"