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(*

 Licensed to the Apache Software Foundation (ASF) under one

 or more contributor license agreements. See the NOTICE file

 distributed with this work for additional information

 regarding copyright ownership. The ASF licenses this file

 to you under the Apache License, Version 2.0 (the

 "License"); you may not use this file except in compliance

 with the License. You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing,

 software distributed under the License is distributed on an

 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

 KIND, either express or implied. See the License for the

 specific language governing permissions and limitations

 under the License.

*)

open Thrift

module T = Transport

class t (i,o) =

object (self)

  val mutable opened = true

  inherit Transport.t

  method isOpen = opened

  method opn = ()

  method close = close_in i; opened <- false

  method read buf off len =

    if opened then

      try

        really_input i buf off len; len

      with _ -> raise (T.E (T.UNKNOWN, ("TChannelTransport: Could not read "^(string_of_int len))))

    else

      raise (T.E (T.NOT_OPEN, "TChannelTransport: Channel was closed"))

  method write buf off len = output o buf off len

  method flush = flush o

end