mlMainExecutor.h

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/*************************************************************************************
**
** Copyright 2021, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 
#pragma once
 
#include "mlBackgroundTaskManager.h"
#include "mlBackgroundTaskMessage.h"
 
#include <mlTypeDefs.h>
#include <stlab/concurrency/task.hpp>
 
ML_START_NAMESPACE
 
//-----------------------------------------------------------------------
class MainExecutorT
{
  using result_type = void;
 
  class MainExecutorMessage final : public BackgroundTaskMessage
  {
    stlab::task<void()> _f;
 
  public:
    template <typename F>
    void setTask(F&& f)
    {
      _f = std::forward<F>(f);
    }
 
    void execute() override
    {
      _f();
    }
  };
 
public:
 
  template <typename F>
  void operator()(F f) const
  {
    auto message = std::make_unique<MainExecutorMessage>();
    message->setTask(std::move(f));
    BackgroundTaskManager::self().sendMessageToGUI(message.release());
  }
};
 
constexpr auto MainExecutor = MainExecutorT{};
 
ML_END_NAMESPACE