SignalHandler.cpp

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/*
 * SignalHandler.cpp
 *
 * Copyright (C) 2014 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#include "ibrcommon/thread/SignalHandler.h"

namespace ibrcommon
{
        ibrcommon::Queue<int> SignalHandler::_signal_queue;

        void SignalHandler::_proxy_handler(int signal)
        {
                _signal_queue.push(signal);
        }

        SignalHandler::SignalHandler(void (*handler)(int))
         : _handler(handler)
        {
        }

        SignalHandler::~SignalHandler()
        {
                stop();
                join();
        }

        void SignalHandler::initialize()
        {
                start();
        }

        void SignalHandler::handle(int signal)
        {
                // register signal at system
                ::signal(signal, _proxy_handler);
        }

        void SignalHandler::run(void) throw ()
        {
                try {
                        int signal = _signal_queue.getnpop(true);
                        _handler(signal);
                } catch (const ibrcommon::QueueUnblockedException &e) {
                        // unblocked
                }
        }

        void SignalHandler::__cancellation() throw ()
        {
                _signal_queue.abort();
        }
} /* namespace ibrcommon */