RAUL  0.7.0
AtomicPtr.hpp
00001 /* This file is part of Raul.
00002  * Copyright (C) 2007-2009 David Robillard <http://drobilla.net>
00003  *
00004  * Raul is free software; you can redistribute it and/or modify it under the
00005  * terms of the GNU General Public License as published by the Free Software
00006  * Foundation; either version 2 of the License, or (at your option) any later
00007  * version.
00008  *
00009  * Raul is distributed in the hope that it will be useful, but WITHOUT ANY
00010  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00011  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
00012  *
00013  * You should have received a copy of the GNU General Public License along
00014  * with this program; if not, write to the Free Software Foundation, Inc.,
00015  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
00016  */
00017 
00018 #ifndef RAUL_ATOMIC_PTR_HPP
00019 #define RAUL_ATOMIC_PTR_HPP
00020 
00021 #include <glib.h>
00022 
00023 namespace Raul {
00024 
00025 
00026 template<typename T>
00027 class AtomicPtr {
00028 public:
00029     inline AtomicPtr()
00030         { g_atomic_pointer_set(static_cast<volatile gpointer*>(&_val), NULL); }
00031 
00032     inline AtomicPtr(const AtomicPtr& copy)
00033         { g_atomic_pointer_set(static_cast<volatile gpointer*>(&_val),
00034                 static_cast<gpointer>(copy.get())); }
00035 
00036     inline T* get() const
00037         { return static_cast<T*>(g_atomic_pointer_get(static_cast<volatile gpointer*>(&_val))); }
00038 
00039     inline void operator=(T* val)
00040         { g_atomic_pointer_set(&_val, static_cast<gpointer>(val)); }
00041 
00043     inline bool compare_and_exchange(gpointer oldval, gpointer newval)
00044         { return g_atomic_pointer_compare_and_exchange(&_val, oldval, newval); }
00045 
00046 private:
00047     mutable volatile gpointer _val;
00048 };
00049 
00050 
00051 } // namespace Raul
00052 
00053 #endif // RAUL_ATOMIC_PTR_HPP