Runner.hpp

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// The Reactive C++ Toolbox.
// Copyright (C) 2013-2019 Swirly Cloud Limited
// Copyright (C) 2022 Reactive Markets Limited
//
// Licensed 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.
 
#ifndef TOOLBOX_IO_RUNNER_HPP
#define TOOLBOX_IO_RUNNER_HPP
 
#include <toolbox/hdr/Histogram.hpp>
#include <toolbox/sys/Thread.hpp>
#include <toolbox/sys/Time.hpp>
#include <toolbox/util/Slot.hpp>
 
#include <functional>
#include <thread>
 
namespace toolbox {
inline namespace io {
class Reactor;
 
using HistogramPtr = std::unique_ptr<Histogram>;
 
using MetricCallbackFunction
    = std::function<void(CyclTime now, HistogramPtr&& time_hist, HistogramPtr&& work_hist)>;
 
struct PassInfo {
    WallTime start{};
    Nanos duration{};
    int work{0};
};
 
using PassSlot = BasicSlot<void(const PassInfo&)>;
 
class TOOLBOX_API ReactorRunner {
  public:
    ReactorRunner(Reactor& r, long busy_cycles, ThreadConfig config);
 
    ReactorRunner(Reactor& r, long busy_cycles, ThreadConfig config,
                  MetricCallbackFunction metric_cb);
 
    ReactorRunner(Reactor& r, long busy_cycles, ThreadConfig config,
                  MetricCallbackFunction metric_cb, PassSlot pass_slot);
 
    ~ReactorRunner();
 
    // Copy.
    ReactorRunner(const ReactorRunner&) = delete;
    ReactorRunner& operator=(const ReactorRunner&) = delete;
 
    // Move.
    ReactorRunner(ReactorRunner&&) = delete;
    ReactorRunner& operator=(ReactorRunner&&) = delete;
 
  private:
    Reactor& reactor_;
    std::atomic<bool> stop_{false};
    std::thread thread_;
};
 
} // namespace io
} // namespace toolbox
 
#endif // TOOLBOX_IO_RUNNER_HPP