| #ifndef PROTON_FUNCTION_HPP |
| #define PROTON_FUNCTION_HPP |
| |
| /* |
| * 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. |
| */ |
| |
| namespace proton { |
| |
| /// A C++03 compatible void no-argument callback function object. |
| /// |
| /// Used by container::schedule() and event_loop::inject(). In C++11 |
| /// you can use std::bind, std::function or a void-no-argument lambda |
| /// instead. |
| /// |
| /// void_function0 is passed by reference, so instances of sub-classes |
| /// do not have to be heap allocated. Once passed, the instance must |
| /// not be deleted until its operator() is called or the container has |
| /// stopped. |
| class void_function0 { |
| public: |
| virtual ~void_function0() {} |
| /// Override the call operator with your code. |
| virtual void operator()() = 0; |
| }; |
| |
| } |
| |
| #endif // PROTON_FUNCTION_HPP |