/******************************************************************************* Copyright(C) Jonas 'Sortie' Termansen 2012. This file is part of Sortix. Sortix 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. Sortix 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 Sortix. If not, see . refcount.cpp A class that implements reference counting. *******************************************************************************/ #include #include #include namespace Sortix { Refcounted::Refcounted() { reflock = KTHREAD_MUTEX_INITIALIZER; refcount = 1; } Refcounted::~Refcounted() { // It's OK to be deleted if our refcount is 1, it won't mess with any // other owners that might need us. ASSERT(refcount <= 1); } void Refcounted::Refer() { ScopedLock lock(&reflock); refcount++; } void Refcounted::Unref() { kthread_mutex_lock(&reflock); bool deleteme = !--refcount; kthread_mutex_unlock(&reflock); if ( deleteme ) delete this; } } // namespace Sortix