129 lines
3.6 KiB
C++
129 lines
3.6 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 2011-2013 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_SIGNAL_HPP
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#error
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#endif
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namespace util {
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template <typename Ret, typename ...Args>
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signal<Ret, Args...>::scoped_cookie::scoped_cookie (cookie _cookie,
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signal<Ret, Args...> &_parent):
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m_cookie (_cookie),
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m_parent (_parent)
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{ ; }
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template <typename Ret, typename ...Args>
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signal<Ret, Args...>::scoped_cookie::scoped_cookie (scoped_cookie &&rhs):
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m_cookie (rhs.m_cookie),
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m_parent (rhs.m_parent)
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{
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rhs.m_cookie = rhs.m_parent.m_children.end ();
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}
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template <typename Ret, typename ...Args>
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signal<Ret, Args...>::scoped_cookie::~scoped_cookie () {
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if (m_parent.m_children.end () != m_cookie)
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m_parent.disconnect (m_cookie);
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}
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template <typename Ret, typename ...Args>
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void
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signal<Ret, Args...>::scoped_cookie::renew (callback_object &&cb)
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{ *m_cookie = std::move (cb); }
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template <typename Ret, typename ...Args>
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void
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signal<Ret, Args...>::scoped_cookie::release (void)
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{ m_cookie = m_parent.m_children.end (); }
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template <typename Ret, typename ...Args>
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signal<Ret, Args...>::signal ()
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{ ; }
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template <typename Ret, typename ...Args>
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typename signal<Ret, Args...>::cookie
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signal<Ret, Args...>::connect (const callback_object &_cb)
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{ return m_children.insert (m_children.end (), _cb); }
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template <typename Ret, typename ...Args>
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typename signal<Ret, Args...>::scoped_cookie
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signal<Ret, Args...>::scoped_connect (const callback_object &_cb)
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{ return scoped_cookie (connect (_cb), *this); }
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/// Add a callback to the list.
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//const cookie
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//connect (const callback_function &_cb)
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// { return m_children.insert (m_children.end (), _cb); }
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template <typename Ret, typename ...Args>
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void
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signal<Ret, Args...>::disconnect (const cookie _cb)
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{ m_children.erase (_cb); }
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/// Disconnect all callbacks
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template <typename Ret, typename ...Args>
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void
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signal<Ret, Args...>::clear (void)
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{ m_children.clear (); }
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/// Returns the number of callbacks connected.
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template <typename Ret, typename ...Args>
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unsigned int
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signal<Ret, Args...>::size (void) const
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{ return m_children.size (); }
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template <typename Ret, typename ...Args>
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bool
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signal<Ret, Args...>::empty (void) const
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{ return m_children.empty (); }
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template <typename Ret, typename ...Args>
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void
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signal<Ret, Args...>::operator () (Args... tail) {
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if (m_children.empty ())
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return;
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auto i = m_children.cbegin ();
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bool looping;
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do {
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// Increment before we execute so that the caller is able to deregister during execution.
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auto current = i++;
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looping = m_children.cend () != i;
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(*current)(tail...);
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} while (looping);
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}
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}
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