Pipe.cxx
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上传日期:2013-07-25
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- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const Pipe_cxx_Version =
- "$Id: Pipe.cxx,v 1.2 2001/06/29 05:36:28 bko Exp $";
- #if !defined(WIN32)
- #include "Pipe.hxx"
- #include "VLog.hxx"
- #include "SystemException.hxx"
- #include "VocalCommon.hxx"
- #include <string>
- #include <unistd.h>
- #include <cerrno>
- using Vocal::IO::Pipe;
- using Vocal::IO::FileDescriptor;
- using Vocal::IO::file_descriptor_t;
- using Vocal::Logging::VLog;
- using Vocal::ReturnCode;
- using Vocal::SUCCESS;
- Pipe::Pipe(
- const file_descriptor_t * descriptors
- )
- throw ( Vocal::SystemException )
- : readFD_(FileDescriptor::INVALID),
- writeFD_(FileDescriptor::INVALID)
- {
- const string fn("Pipe::Pipe");
- VLog log(fn);
-
- VVERBOSE(log) << fn << ": this = 0x" << this << VVERBOSE_END(log);
-
- if ( descriptors != 0 )
- {
- readFD_.setFD(descriptors[0]);
- writeFD_.setFD(descriptors[1]);
- }
- else
- {
- int filedes[2];
- filedes[0] = filedes[1] = FileDescriptor::INVALID;
- ReturnCode rc = ::pipe(filedes);
-
- if ( rc != SUCCESS )
- {
- throw Vocal::SystemException(fn + "on pipe(): " + strerror(errno),
- __FILE__, __LINE__, errno);
- }
-
- readFD_.setFD(filedes[0]);
- writeFD_.setFD(filedes[1]);
- }
- VDEBUG(log) << fn << ": " << *this << VDEBUG_END(log);
- }
- Pipe::Pipe(
- const FileDescriptor & readFd,
- const FileDescriptor & writeFd
- )
- : readFD_(FileDescriptor::INVALID),
- writeFD_(FileDescriptor::INVALID)
- {
- const string fn("Pipe::Pipe");
- VLog log(fn);
-
- VVERBOSE(log) << fn << ": this = 0x" << this << VVERBOSE_END(log);
-
- readFD_.setFD(readFd.getFD());
- writeFD_.setFD(writeFd.getFD());
- VDEBUG(log) << fn << ": " << *this << VDEBUG_END(log);
- }
- Pipe::~Pipe()
- throw ( Vocal::SystemException )
- {
- const string fn("Pipe::~Pipe");
- VLog log(fn);
-
- VVERBOSE(log) << fn << ": this = 0x" << this << VVERBOSE_END(log);
- }
- FileDescriptor &
- Pipe::operator[](size_t index)
- {
- if ( index == 0 )
- {
- return ( readFD() );
- }
-
- return ( writeFD() );
- }
-
- FileDescriptor &
- Pipe::readFD()
- {
- return ( readFD_ );
- }
- const FileDescriptor &
- Pipe::readFD() const
- {
- return ( readFD_ );
- }
- FileDescriptor &
- Pipe::writeFD()
- {
- return ( writeFD_ );
- }
- const FileDescriptor &
- Pipe::writeFD() const
- {
- return ( writeFD_ );
- }
- bool
- Pipe::operator==(const Pipe & src) const
- {
- return ( readFD_ == src.readFD_ && writeFD_ == src.writeFD_ );
- }
- bool
- Pipe::operator<(const Pipe & src) const
- {
- return ( readFD_ < src.readFD_
- || ( readFD_ == src.readFD_ && writeFD_ < src.writeFD_ )
- );
- }
- ostream &
- Pipe::writeTo(ostream & out) const
- {
- return ( out <<"pipe = { read_" << readFD_
- << ", write_" << writeFD_ << " }"
- );
- }
- #endif