function-additor.hh

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/*
 * Scroom - Generic viewer for 2D data
 * Copyright (C) 2009-2026 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);