FunctionTask.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
#include "MantidKernel/Task.h"
#include <functional>
#include <stdexcept>
 
#ifndef Q_MOC_RUN
#include <boost/function.hpp>
#include <utility>
 
#endif
 
namespace Mantid {
 
namespace Kernel {
 
//==============================================================================================
class DLLExport FunctionTask final : public Task {
public:
  using voidFunction = void (*)();
  //---------------------------------------------------------------------------------------------
  FunctionTask(voidFunction func, double cost = 1.0) : Task(cost), m_voidFunc(func) {}
 
  //---------------------------------------------------------------------------------------------
  FunctionTask(std::function<void()> func, double cost = 1.0) : Task(cost), m_voidFunc(std::move(func)) {}
 
  //---------------------------------------------------------------------------------------------
  void run() override {
    if (m_voidFunc)
      m_voidFunc();
    else
      throw std::runtime_error("FunctionTask: NULL method pointer provided.");
  }
 
protected:
  std::function<void()> m_voidFunc;
};
 
} // namespace Kernel
} // namespace Mantid