| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MOJO_EDK_SYSTEM_PORTS_MESSAGE_FILTER_H_ |
| #define MOJO_EDK_SYSTEM_PORTS_MESSAGE_FILTER_H_ |
| |
| namespace mojo { |
| namespace edk { |
| namespace ports { |
| |
| class Message; |
| |
| // An interface which can be implemented to filter port messages according to |
| // arbitrary policy. |
| class MessageFilter { |
| public: |
| virtual ~MessageFilter() {} |
| |
| // Returns true of |message| should be accepted by whomever is applying this |
| // filter. See MessageQueue::GetNextMessage(), for example. |
| virtual bool Match(const Message& message) = 0; |
| }; |
| |
| } // namespace ports |
| } // namespace edk |
| } // namespace mojo |
| |
| #endif // MOJO_EDK_SYSTEM_PORTS_MESSAGE_FILTER_H_ |