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104 lines
2.6 KiB
104 lines
2.6 KiB
/*
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Copyright (C) 2000 Stefan Westerfeld
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stefan@space.twc.de
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef ASYNCSTREAM_H
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#define ASYNCSTREAM_H
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#include "arts_export.h"
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#include "buffer.h"
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#include "datapacket.h"
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/*
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* BC - tqStatus (2002-03-08): GenericAsyncStream, AsyncStream,
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* FloatAsyncStream/ByteAsyncStream
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*
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* These classes are to be treated with extreme care, as they are used in
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* all kinds of relations with the flow system and the generated code. Do
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* NOT touch unless you REALLY know what you are doing. For further
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* extensibility, GenericAsyncStream features a private d pointer.
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*/
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namespace Arts {
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class GenericAsyncStreamPrivate;
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class ARTS_EXPORT GenericAsyncStream {
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private:
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GenericAsyncStreamPrivate *d; // unused
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public:
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/**
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* interface to create packets and to get rid of them
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*/
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virtual GenericDataPacket *createPacket(int capacity) = 0;
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virtual void freePacket(GenericDataPacket *packet) = 0;
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virtual GenericAsyncStream *createNewStream() = 0;
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GenericDataChannel *channel;
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int _notifyID;
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inline int notifyID() { return _notifyID; }
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};
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template<class T>
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class AsyncStream : public GenericAsyncStream {
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protected:
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GenericDataPacket *createPacket(int capacity)
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{
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return allocPacket(capacity);
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}
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void freePacket(GenericDataPacket *packet)
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{
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delete packet;
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}
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public:
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// for outgoing streams
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virtual DataPacket<T> *allocPacket(int capacity) = 0;
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inline void setPull(int packets, int capacity)
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{
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channel->setPull(packets,capacity);
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}
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inline void endPull()
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{
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channel->endPull();
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}
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};
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class ARTS_EXPORT FloatAsyncStream : public AsyncStream<float>
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{
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public:
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DataPacket<float> *allocPacket(int capacity);
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GenericAsyncStream *createNewStream();
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};
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class ARTS_EXPORT ByteAsyncStream : public AsyncStream<mcopbyte>
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{
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public:
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DataPacket<mcopbyte> *allocPacket(int capacity);
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GenericAsyncStream *createNewStream();
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};
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}
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#endif /* ASYNCSTREAM_H */
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