mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-25 17:10:59 +01:00
157 lines
3.8 KiB
C++
157 lines
3.8 KiB
C++
//
|
|
// FIFOBufferStream.h
|
|
//
|
|
// $Id: //poco/1.4/Foundation/include/Poco/FIFOBufferStream.h#1 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: Streams
|
|
// Module: FIFOBufferStream
|
|
//
|
|
// Definition of the FIFOBufferStream class.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef Foundation_FIFOBufferStream_INCLUDED
|
|
#define Foundation_FIFOBufferStream_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
#include "Poco/FIFOBuffer.h"
|
|
#include "Poco/BufferedBidirectionalStreamBuf.h"
|
|
#include <istream>
|
|
#include <ostream>
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
class Foundation_API FIFOBufferStreamBuf: public BufferedBidirectionalStreamBuf
|
|
/// This is the streambuf class used for reading from and writing to a FIFOBuffer.
|
|
/// FIFOBuffer is enabled for emtpy/non-empty/full state transitions notifications.
|
|
{
|
|
public:
|
|
|
|
FIFOBufferStreamBuf();
|
|
/// Creates a FIFOBufferStreamBuf.
|
|
|
|
explicit FIFOBufferStreamBuf(FIFOBuffer& fifoBuffer);
|
|
/// Creates a FIFOBufferStreamBuf and assigns the given buffer to it.
|
|
|
|
FIFOBufferStreamBuf(char* pBuffer, std::size_t length);
|
|
/// Creates a FIFOBufferStreamBuf and assigns the given buffer to it.
|
|
|
|
FIFOBufferStreamBuf(const char* pBuffer, std::size_t length);
|
|
/// Creates a FIFOBufferStreamBuf and assigns the given buffer to it.
|
|
|
|
explicit FIFOBufferStreamBuf(std::size_t length);
|
|
/// Creates a FIFOBufferStreamBuf of the given length.
|
|
|
|
~FIFOBufferStreamBuf();
|
|
/// Destroys the FIFOBufferStreamBuf.
|
|
|
|
FIFOBuffer& fifoBuffer();
|
|
/// Returns the underlying FIFO buffer reference.
|
|
|
|
protected:
|
|
int readFromDevice(char* buffer, std::streamsize length);
|
|
int writeToDevice(const char* buffer, std::streamsize length);
|
|
|
|
private:
|
|
enum
|
|
{
|
|
STREAM_BUFFER_SIZE = 1024
|
|
};
|
|
|
|
FIFOBuffer* _pFIFOBuffer;
|
|
FIFOBuffer& _fifoBuffer;
|
|
};
|
|
|
|
|
|
class Foundation_API FIFOIOS: public virtual std::ios
|
|
/// The base class for FIFOBufferInputStream and
|
|
/// FIFOBufferStream.
|
|
///
|
|
/// This class is needed to ensure the correct initialization
|
|
/// order of the stream buffer and base classes.
|
|
{
|
|
public:
|
|
explicit FIFOIOS(FIFOBuffer& buffer);
|
|
/// Creates a FIFOIOS and assigns the given buffer to it.
|
|
|
|
FIFOIOS(char* pBuffer, std::size_t length);
|
|
/// Creates a FIFOIOS and assigns the given buffer to it.
|
|
|
|
FIFOIOS(const char* pBuffer, std::size_t length);
|
|
/// Creates a FIFOIOS and assigns the given buffer to it.
|
|
|
|
explicit FIFOIOS(std::size_t length);
|
|
/// Creates a FIFOIOS of the given length.
|
|
|
|
~FIFOIOS();
|
|
/// Destroys the FIFOIOS.
|
|
///
|
|
/// Flushes the buffer.
|
|
|
|
FIFOBufferStreamBuf* rdbuf();
|
|
/// Returns a pointer to the internal FIFOBufferStreamBuf.
|
|
|
|
void close();
|
|
/// Flushes the stream.
|
|
|
|
protected:
|
|
FIFOBufferStreamBuf _buf;
|
|
};
|
|
|
|
|
|
class Foundation_API FIFOBufferStream: public FIFOIOS, public std::iostream
|
|
/// An output stream for writing to a FIFO.
|
|
{
|
|
public:
|
|
Poco::BasicEvent<bool>& readable;
|
|
Poco::BasicEvent<bool>& writable;
|
|
|
|
explicit FIFOBufferStream(FIFOBuffer& buffer);
|
|
/// Creates the FIFOBufferStream with supplied buffer as initial value.
|
|
|
|
FIFOBufferStream(char* pBuffer, std::size_t length);
|
|
/// Creates a FIFOBufferStream and assigns the given buffer to it.
|
|
|
|
FIFOBufferStream(const char* pBuffer, std::size_t length);
|
|
/// Creates a FIFOBufferStream and assigns the given buffer to it.
|
|
|
|
explicit FIFOBufferStream(std::size_t length);
|
|
/// Creates a FIFOBufferStream of the given length.
|
|
|
|
~FIFOBufferStream();
|
|
/// Destroys the FIFOBufferStream.
|
|
///
|
|
/// Flushes the buffer.
|
|
|
|
private:
|
|
FIFOBufferStream();
|
|
FIFOBufferStream(const FIFOBufferStream& other);
|
|
FIFOBufferStream& operator =(const FIFOBufferStream& other);
|
|
};
|
|
|
|
|
|
///
|
|
/// inlines
|
|
///
|
|
|
|
|
|
inline FIFOBuffer& FIFOBufferStreamBuf::fifoBuffer()
|
|
{
|
|
return _fifoBuffer;
|
|
}
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_FIFOBufferStream_INCLUDED
|