Files
scylladb/core/task.hh
Avi Kivity 2877364947 future: separate task class into its own header
tasks are a lower-level concept than future/promise, so move them to their
own header.
2015-05-31 15:49:05 +03:00

49 lines
1.3 KiB
C++

/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. 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.
*/
/*
* Copyright (C) 2015 Cloudius Systems, Ltd.
*/
#pragma once
#include <memory>
class task {
public:
virtual ~task() noexcept {}
virtual void run() noexcept = 0;
};
void schedule(std::unique_ptr<task> t);
template <typename Func>
class lambda_task final : public task {
Func _func;
public:
lambda_task(const Func& func) : _func(func) {}
lambda_task(Func&& func) : _func(std::move(func)) {}
virtual void run() noexcept override { _func(); }
};
template <typename Func>
inline
std::unique_ptr<task>
make_task(Func&& func) {
return std::make_unique<lambda_task<Func>>(std::forward<Func>(func));
}