1 /* 2 * Copyright (c) 2012, 2019, 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 25 #ifndef SHARE_VM_JFR_UTILITIES_JFRTRACETIME_HPP 26 #define SHARE_VM_JFR_UTILITIES_JFRTRACETIME_HPP 27 28 #include "jni.h" 29 #include "utilities/macros.hpp" 30 31 #if INCLUDE_TRACE 32 33 class JfrTraceTime { 34 private: 35 static bool _ft_enabled; 36 jlong _ticks; 37 JfrTraceTime(); 38 public: 39 static bool initialize(); 40 static bool is_ft_enabled() { return _ft_enabled; } 41 static bool is_ft_supported(); 42 static jlong frequency(); 43 static JfrTraceTime now(); 44 static const void* time_function(); 45 46 JfrTraceTime(jlong ticks) : _ticks(ticks) {} 47 jlong value() const { return _ticks; } 48 void stamp(); 49 50 bool operator==(const JfrTraceTime& rhs) const { 51 return _ticks == rhs._ticks; 52 } 53 bool operator!=(const JfrTraceTime& rhs) { 54 return !operator==(rhs); 55 } 56 void operator+(jlong rhs_value) { 57 _ticks += rhs_value; 58 } 59 bool operator>(const JfrTraceTime& rhs) const { 60 return _ticks > rhs._ticks; 61 } 62 operator jlong() const { 63 return _ticks; 64 } 65 }; 66 67 #else // !INCLUDE_TRACE 68 69 typedef jlong JfrTraceTime; 70 71 #endif // INCLUDE_TRACE 72 #endif // SHARE_VM_JFR_UTILITIES_JFRTRACETIME_HPP