function-additor.hh

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/*
 * Scroom - Generic viewer for 2D data
 * Copyright (C) 2009-2022 Kees-Jan Dijkzeul
 *
 * SPDX-License-Identifier: LGPL-2.1
 */
 
#pragma once
 
#include <list>
 
#include <boost/function.hpp>
 
namespace Scroom::Detail::ThreadPool
{
  class FunctionAdditor
  {
  private:
    std::list<boost::function<void()>> functions;
 
  public:
    void addBefore(boost::function<void()> const& fn);
    void addAfter(boost::function<void()> const& fn);
 
    FunctionAdditor& operator+(boost::function<void()> const& fn);
    FunctionAdditor& operator+=(boost::function<void()> const& fn);
    void             operator()();
  };
 
  class FunctionMultiplier
  {
  private:
    boost::function<void()> f;
    unsigned int            i;
 
  public:
    FunctionMultiplier(boost::function<void()> f_, unsigned int i_);
 
    FunctionMultiplier& operator*(unsigned int i);
    void                operator()();
  };
} // namespace Scroom::Detail::ThreadPool
 
Scroom::Detail::ThreadPool::FunctionAdditor     operator+(boost::function<void()> const& f1, boost::function<void()> const& f2);
Scroom::Detail::ThreadPool::FunctionAdditor&    operator+(boost::function<void()> const&               f1,
                                                       Scroom::Detail::ThreadPool::FunctionAdditor& f2);
Scroom::Detail::ThreadPool::FunctionMultiplier& operator*(unsigned int i, Scroom::Detail::ThreadPool::FunctionMultiplier& m);
Scroom::Detail::ThreadPool::FunctionMultiplier  operator*(unsigned int i, boost::function<void()> const& f);
Scroom::Detail::ThreadPool::FunctionMultiplier  operator*(boost::function<void()> const& f, unsigned int i);