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/*
Copyright (C) 2000 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef ASYNCSTREAM_H
#define ASYNCSTREAM_H
#include "arts_export.h"
#include "buffer.h"
#include "datapacket.h"
/*
* BC - tqStatus (2002-03-08): GenericAsyncStream, AsyncStream,
* FloatAsyncStream/ByteAsyncStream
*
* These classes are to be treated with extreme care, as they are used in
* all kinds of relations with the flow system and the generated code. Do
* NOT touch unless you REALLY know what you are doing. For further
* extensibility, GenericAsyncStream features a private d pointer.
*/
namespace Arts {
class GenericAsyncStreamPrivate;
class ARTS_EXPORT GenericAsyncStream {
private:
GenericAsyncStreamPrivate *d; // unused
public:
/**
* interface to create packets and to get rid of them
*/
virtual GenericDataPacket *createPacket(int capacity) = 0;
virtual void freePacket(GenericDataPacket *packet) = 0;
virtual GenericAsyncStream *createNewStream() = 0;
GenericDataChannel *channel;
int _notifyID;
inline int notifyID() { return _notifyID; }
};
template<class T>
class AsyncStream : public GenericAsyncStream {
protected:
GenericDataPacket *createPacket(int capacity)
{
return allocPacket(capacity);
}
void freePacket(GenericDataPacket *packet)
{
delete packet;
}
public:
// for outgoing streams
virtual DataPacket<T> *allocPacket(int capacity) = 0;
inline void setPull(int packets, int capacity)
{
channel->setPull(packets,capacity);
}
inline void endPull()
{
channel->endPull();
}
};
class ARTS_EXPORT FloatAsyncStream : public AsyncStream<float>
{
public:
DataPacket<float> *allocPacket(int capacity);
GenericAsyncStream *createNewStream();
};
class ARTS_EXPORT ByteAsyncStream : public AsyncStream<mcopbyte>
{
public:
DataPacket<mcopbyte> *allocPacket(int capacity);
GenericAsyncStream *createNewStream();
};
}
#endif /* ASYNCSTREAM_H */
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