tuselector.hxx

这是国外的resip协议栈

#if !defined(RESIP_TuSelector_HXX)
#define RESIP_TuSelector_HXX 

#include "resip/stack/SipMessage.hxx"
#include "resip/stack/StatisticsMessage.hxx"
#include "resip/stack/TransactionUserMessage.hxx"
#include "rutil/TimeLimitFifo.hxx"
#include "rutil/Fifo.hxx"

namespace resip
{

class ConnectionTerminated;
class Message;
class TransactionUser;

class TuSelector
{
   public:
      TuSelector(TimeLimitFifo<Message>& fallBackFifo);
      ~TuSelector();
      
      void add(Message* msg, TimeLimitFifo<Message>::DepthUsage usage);
      void add(ConnectionTerminated* term);
      
      unsigned int size() const;      
      bool wouldAccept(TimeLimitFifo<Message>::DepthUsage usage) const;
  
      TransactionUser* selectTransactionUser(const SipMessage& msg);
      bool haveTransactionUsers() const { return mTuSelectorMode; }
      void registerTransactionUser(TransactionUser&);
      void requestTransactionUserShutdown(TransactionUser&);
      void unregisterTransactionUser(TransactionUser&);
      void process();
      unsigned int getTimeTillNextProcessMS();
      bool isTransactionUserStillRegistered(const TransactionUser* ) const;

      
   private:
      void remove(TransactionUser* tu);
      void markShuttingDown(TransactionUser* tu);
      bool exists(TransactionUser* tu);

   private:
      struct Item
      {
            Item(TransactionUser* ptu) : tu(ptu), shuttingDown(false) {}
            TransactionUser* tu;
            bool shuttingDown;
            bool operator==(const Item& rhs) { return tu == rhs.tu; }
      };
      
      typedef std::vector<Item> TuList;
      TuList mTuList;
      TimeLimitFifo<Message>& mFallBackFifo;
      Fifo<TransactionUserMessage> mShutdownFifo;
      bool mTuSelectorMode;
      StatisticsMessage::Payload mStatsPayload;
};
}

#endif

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