mirror of https://github.com/vitalif/grive2
101 lines
2.1 KiB
C++
101 lines
2.1 KiB
C++
/*
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grive: an GPL program to sync a local directory with Google Drive
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Copyright (C) 2012 Wan Wai Ho
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation version 2
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of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "SignalHandler.hh"
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#include <string>
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#include <stdexcept>
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#include <signal.h>
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#include <iostream>
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#include <sstream>
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namespace gr {
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SignalError::SignalError( const std::string& message ) :
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std::runtime_error( message )
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{
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}
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SignalError::~SignalError() throw ()
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{
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}
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SignalHandler::SignalHandler()
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{
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}
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SignalHandler::SignalHandler( const SignalHandler& right )
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{
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}
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SignalHandler& SignalHandler::operator ==( const SignalHandler& right )
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{
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return (*this);
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}
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SignalHandler::~SignalHandler()
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{
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}
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SignalHandler& SignalHandler::GetInstance()
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{
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static SignalHandler _instance;
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return _instance;
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}
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void SignalHandler::UnregisterSignal( unsigned int signumber )
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{
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m_signals[signumber] = 0 ;
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// Restore the old signal
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signal( ( int ) signumber, m_signalsOld[signumber] );
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}
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void SignalHandler::RegisterSignal( unsigned int signumber, Callback callback )
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{
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signals_t::const_iterator anIterator ;
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for (anIterator = m_signals.begin(); anIterator != m_signals.end(); ++anIterator)
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{
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if (anIterator->first == signumber)
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{
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if (anIterator->second != 0)
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{
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std::ostringstream oss;
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oss << "Signal " << signumber << " already has a callback!";
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throw SignalError( oss.str() ); ;
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}
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}
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}
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m_signals[signumber] = callback ;
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if ( ( m_signalsOld[signumber] = signal( ( int ) signumber, m_signals[signumber] ) ) == SIG_ERR ) {
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throw SignalError( " Error while registering the signal! " ) ;
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}
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}
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}
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