/*
 * Copyright (C) 2007-2023 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#ifndef BU_FIFO_H
#define BU_FIFO_H

#include <stdint.h>
#include <sys/types.h>
#include <stdlib.h>

#include "bu/stream.h"
#include "bu/string.h"
#include "bu/exceptionbase.h"

namespace Bu
{
    subExceptionDecl( FifoException );

    /**
     * A fifo stream.
     *@ingroup Streams
     */
    class Fifo : public Bu::Stream
    {
    public:
        Fifo( const Bu::String &sName, int iFlags, mode_t mAcc=-1 );
        virtual ~Fifo();

        virtual void close();
        virtual Bu::size read( void *pBuf, Bu::size nBytes );
        virtual Bu::size write( const void *pBuf, Bu::size nBytes );
        using Stream::write;

        virtual Bu::size tell();
        virtual void seek( Bu::size offset );
        virtual void setPos( Bu::size pos );
        virtual void setPosEnd( Bu::size pos );
        virtual bool isEos();
        virtual bool isOpen();

        virtual void flush();

        virtual bool canRead();
        virtual bool canWrite();

        virtual bool isReadable();
        virtual bool isWritable();
        virtual bool isSeekable();

        virtual bool isBlocking();
        virtual void setBlocking( bool bBlocking=true );

        enum {
            Read        = 0x01,
            Write       = 0x02,
            Create      = 0x04,
            Delete      = 0x08,
            NonBlock    = 0x10
        };

    private:
        int iFlags;
        int iIn;
        int iOut;
    };
}

#endif
