1 /* 2 * Copyright (c) 2014, 2015, Dynatrace and/or its affiliates. All rights reserved. 3 * 4 * This file is part of the Lock Contention Tracing Subsystem for the HotSpot 5 * Virtual Machine, which is developed at Christian Doppler Laboratory on 6 * Monitoring and Evolution of Very-Large-Scale Software Systems. Please 7 * contact us at <http://mevss.jku.at/> if you need additional information 8 * or have any questions. 9 * 10 * This code is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License version 2 only, as 12 * published by the Free Software Foundation. 13 * 14 * This code is distributed in the hope that it will be useful, but WITHOUT 15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 * version 2 for more details (a copy is included in the LICENSE file that 18 * accompanied this code). 19 * 20 * You should have received a copy of the GNU General Public License version 21 * 2 along with this work. If not, see <http://www.gnu.org/licenses/>. 22 * 23 */ 24 25 #ifndef SHARE_VM_EVTRACE_TRACEMACROS_HPP 26 #define SHARE_VM_EVTRACE_TRACEMACROS_HPP 27 28 #include "runtime/atomic.hpp" 29 30 #define EVTRACE_DECLARE_TRACKED_CLASS_FIELDS \ 31 jint _tracing_known; 32 33 #define EVTRACE_INIT_TRACKED_CLASS \ 34 do { _tracing_known = 0; } while (0) 35 36 #define EVTRACE_DEFINE_TRACKED_CLASS_METHODS \ 37 bool is_tracing_known() const { \ 38 return _tracing_known; \ 39 } \ 40 \ 41 bool atomic_mark_tracing_known() { \ 42 return (Atomic::cmpxchg(1, &_tracing_known, 0) == 0); \ 43 } \ 44 \ 45 void reset_tracing_known() { \ 46 /* permitted at safepoint only, no CAS required */ \ 47 _tracing_known = 0; \ 48 } 49 50 #endif /* SHARE_VM_EVTRACE_TRACEMACROS_HPP */