82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2011-2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_SIGNAL_HPP
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#define __UTIL_SIGNAL_HPP
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#include "nocopy.hpp"
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#include <functional>
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#include <list>
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#include <type_traits>
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namespace util {
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template <typename F>
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class signal {
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public:
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using R = std::result_of<F>;
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using callback = std::function<F>;
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struct cookie;
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public:
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signal ();
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~signal ();
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/// Add a callback to list.
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cookie connect (const callback&);
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void disconnect (const cookie&);
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/// Disconnect all callbacks
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void clear (void);
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/// Returns the number of callbacks connected.
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unsigned int size (void) const;
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bool empty (void) const;
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/// Execute all callbacks, ignoring the return parameters. Does
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/// not combine results.
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template <typename ...Args>
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void operator () (Args&&... tail);
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private:
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typedef std::list<callback> group;
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group m_children;
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};
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template <typename T>
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class value_signal : public signal<void(T)> {
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public:
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value_signal (T&&);
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value_signal () = default;
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operator const T&() const;
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value_signal<T>& operator= (const T&);
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private:
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T m_value;
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};
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}
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#include "signal.ipp"
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#endif // __SIGNAL_HPP
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