lockedconnection.hxx

SIP（Session Initiation Protocol）是由IETF定义

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static const char* const LockedConnection_hxx_Version =
    "$Id: LockedConnection.hxx,v 1.10 2002/09/26 01:14:03 bko Exp $";

#include "TlsConnection.hxx"

/** Class provides a wrapper around a the connection object with a being
    serviced flag to ensure that only one thread tries to service a connection
    at a give time
*/
class LockedConnection : public TlsConnection
{

public:
    
	/* Create a locked connection, optionally specifying if the
	   connections are blocking (default to true) */
	LockedConnection (bool blocking = true)
	    : _serviced(false),
	      myReadAuthorized(false),
	      myWriteAuthorized(false)
        {
        }

	LockedConnection(const LockedConnection& src)
		:TlsConnection(src),
		 _serviced(src._serviced),
		 myReadAuthorized(src.myReadAuthorized),
		 myWriteAuthorized(src.myWriteAuthorized)
	{
	}

	///
        ~LockedConnection ()
        {
	}

	/// Returns true if the connection is not being serviced
        bool notServiced() const
        {
            return !(_serviced);
        };

	/// Sets a connection to being serviced
        void beingServiced()
        {
            _serviced = true;
        };

	/// Sets a connection to not being serviced
        void doneService()
        {
            _serviced = false;
        };

	/// true if this connection has been authorized for reading
	bool isReadAuthorized() const
	{
	    return myReadAuthorized || myWriteAuthorized;
	}

	/// true if this connection has been authorized for writing
	bool isWriteAuthorized() const
	{
	    return myWriteAuthorized;
	}

	/// set myReadAuthorized to true
	void readAuthorize()
	{
	    myReadAuthorized = true;
	}

	/// set myWriteAuthorized to true
	void writeAuthorize()
	{
	    myWriteAuthorized = true;
	}

        /// assignment operator
	const LockedConnection& operator=(const LockedConnection& x)
	{
		if(&x != this)
		{
			this->TlsConnection::operator=(x);
			_serviced = x._serviced;
			myReadAuthorized = x.myReadAuthorized;
			myWriteAuthorized = x.myWriteAuthorized;
		}
		return *this;
	}

    private:

	/// boolean flag to trag if this connection is being serviced
        bool _serviced;

	/// boolean flag set when read authentication available
	bool myReadAuthorized;

	/// boolean flag set when write authentication available
	bool myWriteAuthorized;
};


/* Local Variables: */
/* c-file-style: "stroustrup" */
/* indent-tabs-mode: nil */
/* c-file-offsets: ((access-label . -) (inclass . ++)) */
/* c-basic-offset: 4 */
/* End: */