conexus/pipe.h

00001 /***************************************************************************
00002  *   Copyright (C) 2001 by Rick L. Vinyard, Jr.                            *
00003  *   rvinyard@cs.nmsu.edu                                                  *
00004  *                                                                         *
00005  *   This program is free software; you can redistribute it and/or modify  *
00006  *   it under the terms of the GNU Lesser General Public License as        *
00007  *   published by the Free Software Foundation version 2.1.                *
00008  *                                                                         *
00009  *   This program is distributed in the hope that it will be useful,       *
00010  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00011  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
00012  *   GNU General Public License for more details.                          *
00013  *                                                                         *
00014  *   You should have received a copy of the GNU Lesser General Public      *
00015  *   License along with this library; if not, write to the                 *
00016  *   Free Software Foundation, Inc.,                                       *
00017  *   51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA              *
00018  ***************************************************************************/
00019 #ifndef CONEXUSPIPE_H
00020 #define CONEXUSPIPE_H
00021 
00022 #include <conexus/filedescriptor.h>
00023 
00034 namespace Conexus
00035 {
00036 
00043   class Pipe : public FileDescriptor
00044   {
00045     protected:
00046 
00047       Pipe( );
00048 
00049     public:
00050 
00051       typedef ConexusPointer<Pipe> pointer;
00052 
00053       static Pipe::pointer create( );
00054 
00055       virtual ~Pipe();
00056 
00057       virtual void open() throw ( open_exception );
00058 
00059       virtual void close( bool force = false ) throw ( close_exception );
00060 
00061       virtual void close_read( bool force = false ) throw ( close_exception );
00062 
00063       virtual void close_write( bool force = false ) throw ( close_exception );
00064 
00065       virtual ssize_t input_available();
00066 
00067     protected:
00068       int m_write_fd;
00069 
00070       virtual ssize_t write_data( long int timeout, const Data data ) throw ( write_exception );
00071 
00072       virtual Data read_data( long int timeout, size_t s = 0 ) throw ( read_exception );
00073   };
00074 
00075 }
00076 
00077 #endif

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