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/*
* Copyright (C) 2007-2008 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.
*/
#include "fifo.h"
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
namespace Bu { subExceptionDef( FifoException ) }
Bu::Fifo::Fifo( const Bu::FString &sName, int iFlags, mode_t mAcc ) :
iFlags( iFlags ),
iIn( -1 ),
iOut( -1 )
{
if( iFlags&Create )
{
if( mkfifo( sName.getStr(), mAcc ) )
{
throw FifoException("Error creating fifo: %s\n", strerror( errno ) );
}
}
if( iFlags&Read )
{
iIn = ::open(
sName.getStr(),
O_RDONLY|((iFlags&NonBlock)?O_NONBLOCK:0)
);
}
if( iFlags&Write )
{
iOut = ::open(
sName.getStr(),
O_WRONLY
);
}
}
Bu::Fifo::~Fifo()
{
close();
}
void Bu::Fifo::close()
{
if( iIn > -1 )
{
::close( iIn );
iIn = -1;
}
if( iOut > -1 )
{
::close( iOut );
iOut = -1;
}
}
size_t Bu::Fifo::read( void *pBuf, size_t nBytes )
{
if( iIn < 0 )
throw FifoException("Fifo not open for reading.");
return TEMP_FAILURE_RETRY( ::read( iIn, pBuf, nBytes ) );
}
size_t Bu::Fifo::write( const void *pBuf, size_t nBytes )
{
if( iOut < 0 )
throw FifoException("Fifo not open for writing.");
return TEMP_FAILURE_RETRY( ::write( iOut, pBuf, nBytes ) );
}
long Bu::Fifo::tell()
{
return -1;
}
void Bu::Fifo::seek( long )
{
}
void Bu::Fifo::setPos( long )
{
}
void Bu::Fifo::setPosEnd( long )
{
}
bool Bu::Fifo::isEos()
{
return false;
}
bool Bu::Fifo::canRead()
{
return (iIn>-1);
}
bool Bu::Fifo::canWrite()
{
return (iOut>-1);
}
bool Bu::Fifo::isReadable()
{
return (iIn>-1);
}
bool Bu::Fifo::isWritable()
{
return (iOut>-1);
}
bool Bu::Fifo::isSeekable()
{
return false;
}
bool Bu::Fifo::isBlocking()
{
return ((fcntl( iIn, F_GETFL, 0 )&O_NONBLOCK) == O_NONBLOCK);
}
void Bu::Fifo::setBlocking( bool bBlocking )
{
if( bBlocking )
fcntl( iIn, F_SETFL, fcntl( iIn, F_GETFL, 0 )&(~O_NONBLOCK) );
else
fcntl( iIn, F_SETFL, fcntl( iIn, F_GETFL, 0 )|O_NONBLOCK );
}
void Bu::Fifo::flush()
{
}
bool Bu::Fifo::isOpen()
{
return (iIn > -1) || (iOut > -1);
}
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