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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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-
- */
-
- #ifndef ASYNCSTREAM_H
- #define ASYNCSTREAM_H
-
- #include "arts_export.h"
- #include "buffer.h"
- #include "datapacket.h"
-
- /*
- * BC - Status (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 */
-