author | mr |
Tue, 29 Oct 2019 13:52:04 -0700 | |
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parent 53520 | 5178e4b58b17 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2019, 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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||
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#ifndef SHARE_RUNTIME_TIMER_HPP |
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#define SHARE_RUNTIME_TIMER_HPP |
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#include "utilities/globalDefinitions.hpp" |
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// Timers for simple measurement. |
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class elapsedTimer { |
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friend class VMStructs; |
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private: |
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jlong _counter; |
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jlong _start_counter; |
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bool _active; |
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public: |
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elapsedTimer() { _active = false; reset(); } |
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elapsedTimer(jlong time, jlong timeUnitsPerSecond); |
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void add(elapsedTimer t); |
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void start(); |
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void stop(); |
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void reset() { _counter = 0; } |
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double seconds() const; |
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jlong milliseconds() const; |
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jlong ticks() const { return _counter; } |
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jlong active_ticks() const; |
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bool is_active() const { return _active; } |
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}; |
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// TimeStamp is used for recording when an event took place. |
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class TimeStamp { |
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private: |
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jlong _counter; |
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public: |
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TimeStamp() { _counter = 0; } |
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void clear() { _counter = 0; } |
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// has the timestamp been updated since being created or cleared? |
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bool is_updated() const { return _counter != 0; } |
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// update to current elapsed time |
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void update(); |
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// update to given elapsed time |
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void update_to(jlong ticks); |
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// returns seconds since updated |
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// (must not be in a cleared state: must have been previously updated) |
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double seconds() const; |
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jlong milliseconds() const; |
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// ticks elapsed between VM start and last update |
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jlong ticks() const { return _counter; } |
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// ticks elapsed since last update |
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jlong ticks_since_update() const; |
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}; |
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class TimeHelper { |
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public: |
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static double counter_to_seconds(jlong counter); |
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static double counter_to_millis(jlong counter); |
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static jlong millis_to_counter(jlong millis); |
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}; |
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#endif // SHARE_RUNTIME_TIMER_HPP |