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The procedures in this section provide means for constructing ports, accessing the type of a port, and manipulating the state of a port.
Returns a new port with type port-type and the given state. The port will be an input, output, or I/O port according to port-type.
Returns the port type of textual-port.
Returns the state component of textual-port.
Changes the state component of textual-port to be object. Returns an unspecified value.
Returns the operation named symbol for textual-port. If
textual-port has no such operation, returns
Returns a newly allocated list whose elements are the names of the operations implemented by textual-port.
These procedures are deprecated; use the procedures defined above.