void gre_io_close(
    gre_io_t *  handle  
)
            

Close an io connection.   Any pending clients will return with an error on their pending actions. This call should be serialized with other clients that are referencing the same gre_io_t handle to avoid race conditions. A common technique for closing handles where a receiving thread may be blocked on the handle is to generate a termination event and have the receiving thread perform the close and channel cleanup.