112 lines
2.7 KiB
C++
112 lines
2.7 KiB
C++
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/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_UTILITIES_TICKS_HPP
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#define SHARE_VM_UTILITIES_TICKS_HPP
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#include "memory/allocation.hpp"
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#include "utilities/globalDefinitions.hpp"
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class Ticks;
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class Tickspan VALUE_OBJ_CLASS_SPEC {
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friend class Ticks;
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friend Tickspan operator-(const Ticks& end, const Ticks& start);
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private:
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jlong _span_ticks;
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Tickspan(const Ticks& end, const Ticks& start);
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public:
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Tickspan() : _span_ticks(0) {}
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Tickspan& operator+=(const Tickspan& rhs) {
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_span_ticks += rhs._span_ticks;
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return *this;
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}
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jlong value() const {
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return _span_ticks;
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}
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};
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class Ticks VALUE_OBJ_CLASS_SPEC {
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private:
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jlong _stamp_ticks;
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public:
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Ticks() : _stamp_ticks(0) {
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assert((_stamp_ticks = invalid_time_stamp) == invalid_time_stamp,
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"initial unstamped time value assignment");
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}
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Ticks& operator+=(const Tickspan& span) {
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_stamp_ticks += span.value();
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return *this;
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}
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Ticks& operator-=(const Tickspan& span) {
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_stamp_ticks -= span.value();
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return *this;
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}
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void stamp();
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jlong value() const {
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return _stamp_ticks;
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}
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static const Ticks now();
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#ifdef ASSERT
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static const jlong invalid_time_stamp;
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#endif
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#ifndef PRODUCT
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// only for internal use by GC VM tests
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friend class TimePartitionPhasesIteratorTest;
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friend class GCTimerTest;
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private:
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// implicit type conversion
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Ticks(int ticks) : _stamp_ticks(ticks) {}
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#endif // !PRODUCT
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};
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class TicksToTimeHelper : public AllStatic {
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public:
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enum Unit {
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SECONDS = 1,
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MILLISECONDS = 1000
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};
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static double seconds(const Tickspan& span);
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static jlong milliseconds(const Tickspan& span);
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};
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#endif // SHARE_VM_UTILITIES_TICKS_HPP
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