thread safe client connections

[A R]

Hello,

I'm writing a multi-threaded non-blocking Thrift client application. Each 
thread will uses its own Thrift connection.

I'm not clear what is required for a non-blocking thread safe client 
connection. Does every thread have to create the following four values: socket, 
transport, protocol, client? Like this:

    shared_ptr<TTransport> socket(new TSocket("localhost", 9090));
    shared_ptr<TTransport> transport(new TBufferedTransport(socket));
    shared_ptr<TProtocol> protocol(new TBinaryProtocol(transport));

    MyThriftClient client(protocol);
    
    And then:

        transport->open();
        client.ping();
        transport->close();

*OR*

    Can one or more values be safely shared between threads? For example: 
socket?

    Also, in the above example the thread calls transport->close();

    Can open/close be replaced with just an open when the thread is created and 
leave it open() even when the thread is in the pool (sleeping)?

TIA!
Adam.