asyncdns.h

/*
  Copyright (c) 2009 by Jakob Schroeter <js@camaya.net>
  This file is part of the gloox library. http://camaya.net/gloox

  This software is distributed under a license. The full license
  agreement can be found in the file LICENSE in this distribution.
  This software may not be copied, modified, sold or distributed
  other than expressed in the named license agreement.

  This software is distributed without any warranty.
*/

#ifndef ASYNCDNS_H__
#define ASYNCDNS_H__

#include "asyncdnshandler.h"
#include "config.h"
#include "macros.h"
#include "mutex.h"

#include <list>
#include <map>
#include <string>

namespace gloox
{

  class AsyncDNSWorker;
  class LogSink;

  class GLOOX_API AsyncDNS : public AsyncDNSHandler
  {
    public:
      AsyncDNS();

      ~AsyncDNS();

      void resolve( AsyncDNSHandler* adh, const std::string& service, const std::string& proto,
                    const std::string& domain, const LogSink& logInstance, void* context );

      void resolve( AsyncDNSHandler* adh, const std::string& domain,
                    const LogSink& logInstance, void* context )
        { resolve( adh, "xmpp-client", "tcp", domain, logInstance, context ); }

      void connect( AsyncDNSHandler* adh, const std::string& host,
                    const LogSink& logInstance, void* context );

      void connect( AsyncDNSHandler* adh, const std::string& host, int port,
                    const LogSink& logInstance, void* context );

    protected:
      // reimplemented from AsyncDNSHandler
      virtual void handleAsyncResolveResult( const DNS::HostMap& hosts, void* context );

      // reimplemented from AsyncDNSHandler
      virtual void handleAsyncConnectResult( int fd, void* context );

    private:
      struct AsyncContext
      {
        AsyncContext( AsyncDNSHandler* adh, void* ctx ) : handler( adh ), context( ctx ) {}
        AsyncDNSHandler* handler;
        void* context;
      };

      typedef std::map<AsyncDNSWorker*, AsyncContext> WorkerMap;
      typedef std::list<AsyncDNSWorker*> WorkerList;
      WorkerMap m_workers;
      WorkerList m_obsoleteWorkers;

      util::Mutex m_workerMutex;
      util::Mutex m_obsoleteWorkerMutex;

  };

}

#endif // ASYNCDNS_H__