Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
Jan Tattermusch | 7897ae9 | 2017-06-07 22:57:36 +0200 | [diff] [blame] | 3 | * Copyright 2015 gRPC authors. |
Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 4 | * |
Jan Tattermusch | 7897ae9 | 2017-06-07 22:57:36 +0200 | [diff] [blame] | 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 8 | * |
Jan Tattermusch | 7897ae9 | 2017-06-07 22:57:36 +0200 | [diff] [blame] | 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 10 | * |
Jan Tattermusch | 7897ae9 | 2017-06-07 22:57:36 +0200 | [diff] [blame] | 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 16 | * |
| 17 | */ |
| 18 | |
| 19 | #import "GRXWriter.h" |
| 20 | |
Jorge Canizales | b10776c | 2015-10-26 10:44:55 -0700 | [diff] [blame] | 21 | /** |
| 22 | * A "proxy" class that simply forwards values, completion, and errors from its input writer to its |
| 23 | * writeable. |
| 24 | * It is useful as a superclass for pipes that act as a transformation of their |
| 25 | * input writer, and for classes that represent objects with input and |
| 26 | * output sequences of values, like an RPC. |
| 27 | * |
| 28 | * Thread-safety: |
| 29 | * All messages sent to this object need to be serialized. When it is started, the writer it wraps |
| 30 | * is started in the same thread. Manual state changes are propagated to the wrapped writer in the |
| 31 | * same thread too. Importantly, all messages the wrapped writer sends to its writeable need to be |
| 32 | * serialized with any message sent to this object. |
| 33 | */ |
Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 34 | @interface GRXForwardingWriter : GRXWriter |
Jorge Canizales | 5604712 | 2015-07-17 12:18:08 -0700 | [diff] [blame] | 35 | - (instancetype)initWithWriter:(GRXWriter *)writer NS_DESIGNATED_INITIALIZER; |
Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 36 | @end |