1 /* 2 * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #ifndef SHARE_GC_Z_ZMARKTERMINATE_HPP 25 #define SHARE_GC_Z_ZMARKTERMINATE_HPP 26 27 #include "gc/z/zGlobals.hpp" 28 #include "memory/allocation.hpp" 29 #include "utilities/globalDefinitions.hpp" 30 31 class ZMarkTerminate { 32 private: 33 uint _nworkers; 34 volatile uint _nworking_stage0 ATTRIBUTE_ALIGNED(ZCacheLineSize); 35 volatile uint _nworking_stage1; 36 37 bool enter_stage(volatile uint* nworking_stage); 38 void exit_stage(volatile uint* nworking_stage); 39 bool try_exit_stage(volatile uint* nworking_stage); 40 41 public: 42 ZMarkTerminate(); 43 44 void reset(uint nworkers); 45 46 bool enter_stage0(); 47 void exit_stage0(); 48 bool try_exit_stage0(); 49 50 bool enter_stage1(); 51 bool try_exit_stage1(); 52 }; 53 54 #endif // SHARE_GC_Z_ZMARKTERMINATE_HPP