DNSThread.h

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//-----------------------------------------------------------------------------
//
//  DNSThread.h
//
//  Async DNS Lookups
//
//  Copyright (c) 2016 Justin Hammond <justin@dynam.ac>
//
//  SOFTWARE NOTICE AND LICENSE
//
//  This file is part of OpenZWave.
//
//  OpenZWave is free software: you can redistribute it and/or modify
//  it under the terms of the GNU Lesser General Public License as published
//  by the Free Software Foundation, either version 3 of the License,
//  or (at your option) any later version.
//
//  OpenZWave is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public License
//  along with OpenZWave.  If not, see <http://www.gnu.org/licenses/>.
//
//-----------------------------------------------------------------------------
 
#ifndef _DNSThread_H
#define _DNSThread_H
 
#include <string>
#include <map>
#include <list>
 
#include "Defs.h"
#include "Driver.h"
#include "platform/Event.h"
#include "platform/Mutex.h"
#include "platform/TimeStamp.h"
#include "platform/DNS.h"
 
namespace OpenZWave
{
    namespace Internal
    {
        namespace Platform
        {
            class Event;
            class Mutex;
            class Thread;
        }
 
        enum LookupType
        {
            DNS_Lookup_ConfigRevision = 1
        };
 
        struct DNSLookup
        {
                uint8 NodeID;
                string lookup;
                string result;
                Internal::Platform::DNSError status;
                LookupType type;
 
        };

        class OPENZWAVE_EXPORT DNSThread
        {
                friend class OpenZWave::Driver;
            private:
                DNSThread(Driver *);
                virtual ~DNSThread();

                static void DNSThreadEntryPoint(Internal::Platform::Event* _exitEvent, void* _context);
                void DNSThreadProc(Internal::Platform::Event* _exitEvent);
 
                /* submit a Request to the DNS List */
                bool sendRequest(DNSLookup *);
 
                /* process the most recent request recieved */
                void processResult();
 
                Driver* m_driver;
                Internal::Platform::Mutex* m_dnsMutex;
                list<DNSLookup *> m_dnslist;
                list<DNSLookup *> m_dnslistinprogress;
                Internal::Platform::Event* m_dnsRequestEvent;
                Internal::Platform::DNS m_dnsresolver;
 
        };
    /* class DNSThread */
    } // namespace Internal
} /* namespace OpenZWave */
 
#endif