// -*- c-basic-offset: 2 -*- /* * This file is part of the KDE libraries * Copyright (C) 1999-2000 Harri Porten (porten@kde.org) * Copyright (C) 2001 Peter Kelly (pmk@post.com) * Copyright (C) 2003 Apple Computer, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #ifndef _KJSCOLLECTOR_H_ #define _KJSCOLLECTOR_H_ #include "value.h" #define KJS_MEM_LIMIT 500000 namespace KJS { /** * @short Garbage collector. */ class Collector { // disallow direct construction/destruction Collector(); public: /** * Register an object with the collector. The following assumptions are * made: * @li the operator new() of the object class is overloaded. * @li operator delete() has been overloaded as well and does not free * the memory on its own. * * @param s Size of the memory to be registered. * @return A pointer to the allocated memory. */ static void* allocate(size_t s); /** * Run the garbage collection. This involves calling the delete operator * on each object and freeing the used memory. */ static bool collect(); static int size(); static bool outOfMemory() { return memoryFull; } #ifdef KJS_DEBUG_MEM /** * Check that nothing is left when the last interpreter gets deleted */ static void finalCheck(); #endif #if APPLE_CHANGES static int numInterpreters(); static int numGCNotAllowedObjects(); static int numReferencedObjects(); static const void *rootObjectClasses(); // actually returns CFSetRef #endif #if TEST_CONSERVATIVE_GC | USE_CONSERVATIVE_GC class Thread; static void registerThread(); #endif private: #if TEST_CONSERVATIVE_GC | USE_CONSERVATIVE_GC static void markProtectedObjects(); static void markCurrentThreadConservatively(); static void markOtherThreadConservatively(Thread *thread); static void markStackObjectsConservatively(); static void markStackObjectsConservatively(void *start, void *end); #endif static bool memoryFull; }; }; #endif /* _KJSCOLLECTOR_H_ */