//
// LDASTools AL - A library collection to provide an abstraction layer
//
// Copyright (C) 2018 California Institute of Technology
//
// LDASTools AL is free software; you may redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 (GPLv2) of the
// License or at your discretion, any later version.
//
// LDASTools AL is distributed in the hope that it will be useful, but
// without any warranty or even the implied warranty of merchantability
// or fitness for a particular purpose. See the GNU General Public
// License (GPLv2) for more details.
//
// Neither the names of the California Institute of Technology (Caltech),
// The Massachusetts Institute of Technology (M.I.T), The Laser
// Interferometer Gravitational-Wave Observatory (LIGO), nor the names
// of its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// You should have received a copy of the licensing terms for this
// software included in the file LICENSE located in the top-level
// directory of this package. If you did not, you can view a copy at
// http://dcc.ligo.org/M1500244/LICENSE
//

#include "ldastoolsal/SystemCallTask.hh"
#include "ldastoolsal/TaskThread.hh"

namespace LDASTools
{
    namespace AL
    {
        //-------------------------------------------------------------------
        /// Because system calls can be very peristant within a thread
        /// context, system calls are set up to background without a reaper
        /// to prevent resource starvation for the rest of the code.
        //-------------------------------------------------------------------
        SystemCallTask::SystemCallTask( )
            : Task( std::string( "SystemCall" ), Thread::CANCEL_ABANDON )
        {
        }

        //-------------------------------------------------------------------
        /// Setup the running of the system call.
        //-------------------------------------------------------------------
        void
        SystemCallTask::operator( )( )
        {
            // Set the errno in the local thread.
            errno = 0;
            m_returnCode = -1;
            try
            {
                m_returnCode = eval( );
            }
            catch ( ... )
            {
                // capture errno
                m_errNo = errno;
                throw;
            }
            // capture errno
            m_errNo = errno;
        }
    } // namespace AL
} // namespace LDASTools
