Socket-probing.

These calls need more documentation.

socket_select(+SymConName,+Timeout,-ReadSockL,-WriteSockL,-ErrSockL,?ErrorCode)

SymConName must be an atom that denotes an existing connection, which must be previously created with socket_set_select/4 (described below). ReadSockL, WriteSockL, ErrSockL are lists of socket handles (as returned by socket/2) that specify the available sockets that are available for reading, writing, or on which exception conditions occurred.

socket_set_select(+SymConName,+ReadSockFdLst,+WriteSockFdLst,+ErrorSockFdLst)

Creates a connection under the symbolic name SymConName (an atom) for subsequent use by socket_select/6. ReadSockFdLst, WriteSockFdLst, and ErrorSockFdLst are lists of sockets for which socket_select/6 is to be monitoring read, write, or exception conditions.

socket_select_destroy(+SymConName)

Destroys the specified connection.