| Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright 2015, Google Inc. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #import "GRXWriter.h" |
| 35 | |
| Jorge Canizales | b10776c | 2015-10-26 10:44:55 -0700 | [diff] [blame] | 36 | /** |
| 37 | * A "proxy" class that simply forwards values, completion, and errors from its input writer to its |
| 38 | * writeable. |
| 39 | * It is useful as a superclass for pipes that act as a transformation of their |
| 40 | * input writer, and for classes that represent objects with input and |
| 41 | * output sequences of values, like an RPC. |
| 42 | * |
| 43 | * Thread-safety: |
| 44 | * All messages sent to this object need to be serialized. When it is started, the writer it wraps |
| 45 | * is started in the same thread. Manual state changes are propagated to the wrapped writer in the |
| 46 | * same thread too. Importantly, all messages the wrapped writer sends to its writeable need to be |
| 47 | * serialized with any message sent to this object. |
| 48 | */ |
| Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 49 | @interface GRXForwardingWriter : GRXWriter |
| Jorge Canizales | 5604712 | 2015-07-17 12:18:08 -0700 | [diff] [blame] | 50 | - (instancetype)initWithWriter:(GRXWriter *)writer NS_DESIGNATED_INITIALIZER; |
| Jorge Canizales | 7b52c98 | 2015-07-16 18:41:21 -0700 | [diff] [blame] | 51 | @end |