1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/utilities/ticks.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,111 @@
1.4 +/*
1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_UTILITIES_TICKS_HPP
1.29 +#define SHARE_VM_UTILITIES_TICKS_HPP
1.30 +
1.31 +#include "memory/allocation.hpp"
1.32 +#include "utilities/globalDefinitions.hpp"
1.33 +
1.34 +class Ticks;
1.35 +
1.36 +class Tickspan VALUE_OBJ_CLASS_SPEC {
1.37 + friend class Ticks;
1.38 + friend Tickspan operator-(const Ticks& end, const Ticks& start);
1.39 +
1.40 + private:
1.41 + jlong _span_ticks;
1.42 +
1.43 + Tickspan(const Ticks& end, const Ticks& start);
1.44 +
1.45 + public:
1.46 + Tickspan() : _span_ticks(0) {}
1.47 +
1.48 + Tickspan& operator+=(const Tickspan& rhs) {
1.49 + _span_ticks += rhs._span_ticks;
1.50 + return *this;
1.51 + }
1.52 +
1.53 + jlong value() const {
1.54 + return _span_ticks;
1.55 + }
1.56 +
1.57 +};
1.58 +
1.59 +class Ticks VALUE_OBJ_CLASS_SPEC {
1.60 + private:
1.61 + jlong _stamp_ticks;
1.62 +
1.63 + public:
1.64 + Ticks() : _stamp_ticks(0) {
1.65 + assert((_stamp_ticks = invalid_time_stamp) == invalid_time_stamp,
1.66 + "initial unstamped time value assignment");
1.67 + }
1.68 +
1.69 + Ticks& operator+=(const Tickspan& span) {
1.70 + _stamp_ticks += span.value();
1.71 + return *this;
1.72 + }
1.73 +
1.74 + Ticks& operator-=(const Tickspan& span) {
1.75 + _stamp_ticks -= span.value();
1.76 + return *this;
1.77 + }
1.78 +
1.79 + void stamp();
1.80 +
1.81 + jlong value() const {
1.82 + return _stamp_ticks;
1.83 + }
1.84 +
1.85 + static const Ticks now();
1.86 +
1.87 +#ifdef ASSERT
1.88 + static const jlong invalid_time_stamp;
1.89 +#endif
1.90 +
1.91 +#ifndef PRODUCT
1.92 + // only for internal use by GC VM tests
1.93 + friend class TimePartitionPhasesIteratorTest;
1.94 + friend class GCTimerTest;
1.95 +
1.96 + private:
1.97 + // implicit type conversion
1.98 + Ticks(int ticks) : _stamp_ticks(ticks) {}
1.99 +
1.100 +#endif // !PRODUCT
1.101 +
1.102 +};
1.103 +
1.104 +class TicksToTimeHelper : public AllStatic {
1.105 + public:
1.106 + enum Unit {
1.107 + SECONDS = 1,
1.108 + MILLISECONDS = 1000
1.109 + };
1.110 + static double seconds(const Tickspan& span);
1.111 + static jlong milliseconds(const Tickspan& span);
1.112 +};
1.113 +
1.114 +#endif // SHARE_VM_UTILITIES_TICKS_HPP
