libcruft-util/signal.hpp

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/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2011 Danny Robson <danny@blubinc.net>
*/
#ifndef __SIGNAL_HPP
#define __SIGNAL_HPP
#include <algorithm>
#include <vector>
#include <functional>
namespace util {
template <typename Ret, typename ...Args>
class signal {
public:
typedef Ret (*callback_function)(Args...);
typedef std::function<Ret(Args...)> callback_object;
protected:
std::vector<callback_object> m_children;
public:
signal ()
{ m_children.reserve (16); }
/// Add a callback to list.
void connect (callback_object _cb)
{ m_children.push_back (_cb); }
/// Add a callback to the list.
void connect (callback_function _cb)
{ m_children.push_back (_cb); }
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/// Remove all instances of callback `cb'
//void disconnect (callback_function _cb)
// { disconnect (callback_object (_cb)); }
/// Remove all instances of callback `cb'
/*void disconnect (callback_object _cb) {
m_children.erase (std::remove (m_children.begin (),
m_children.end (),
_cb),
m_children.end ());
}*/
/// Disconnect all callbacks
void clear (void)
{ m_children.clear (); }
/// Returns the number of callbacks connected.
unsigned int size (void) const
{ return m_children.size (); }
/// Execute all callbacks, ignoring the return parameters. Does not combine results.
void operator () (Args... tail) {
for (auto i = m_children.begin (), end = m_children.end (); i != end; ++i)
(*i)(tail...);
}
};
}
#endif // __SIGNAL_HPP