fixed race condition

Destination.cpp

@@ -85,15 +85,21 @@ namespace client
 
 	void ClientDestination::Start ()
 	{	
+		if (!m_IsRunning)
+		{	
+			m_IsRunning = true;
 			m_Pool->SetLocalDestination (this);
 			m_Pool->SetActive (true);
-		m_IsRunning = true;
 			m_Thread = new std::thread (std::bind (&ClientDestination::Run, this));
 			m_StreamingDestination->Start ();	
 		}	
+	}
 		
 	void ClientDestination::Stop ()
 	{	
+		if (m_IsRunning)
+		{	
+			m_IsRunning = false;
 			m_StreamingDestination->Stop ();	
 			if (m_DatagramDestination)
 			{
@@ -106,7 +112,6 @@ namespace client
 				m_Pool->SetLocalDestination (nullptr);
 				i2p::tunnel::tunnels.StopTunnelPool (m_Pool);
 			}	
-		m_IsRunning = false;
 			m_Service.stop ();
 			if (m_Thread)
 			{	
@@ -115,6 +120,7 @@ namespace client
 				m_Thread = 0;
 			}	
 		}	
+	}	
 
 	const i2p::data::LeaseSet * ClientDestination::FindLeaseSet (const i2p::data::IdentHash& ident)
 	{

Destination.h

@@ -112,7 +112,7 @@ namespace client
 			
 		private:
 
-			bool m_IsRunning;
+			volatile bool m_IsRunning;
 			std::thread * m_Thread;	
 			boost::asio::io_service m_Service;
 			boost::asio::io_service::work m_Work;