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#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.
*/
/// @file
/// **Deprecated** - Use the API in `work_queue.hpp`.
/// @cond INTERNAL
namespace proton {
/// **Deprecated** - Use `proton::work`.
///
/// A C++03-compatible void no-argument callback function object.
///
/// Used by `container::schedule()` and `work_queue::add()`. 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
/// subclasses 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;
};
} // proton
/// @endcond
#endif // PROTON_FUNCTION_HPP
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