jdk

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/*
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 * Copyright (c) 1997, 2023, 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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#include "precompiled.hpp"
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#include "logging/log.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/os.hpp"
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#include "runtime/timer.hpp"
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#include "utilities/ostream.hpp"
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double TimeHelper::counter_to_seconds(jlong counter) {
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  double freq  = (double) os::elapsed_frequency();
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  return (double)counter / freq;
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}
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double TimeHelper::counter_to_millis(jlong counter) {
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  return counter_to_seconds(counter) * 1000.0;
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}
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jlong TimeHelper::millis_to_counter(jlong millis) {
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  jlong freq = os::elapsed_frequency() / MILLIUNITS;
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  return millis * freq;
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}
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jlong TimeHelper::micros_to_counter(jlong micros) {
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  jlong freq = os::elapsed_frequency() / MICROUNITS;
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  return micros * freq;
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}
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void elapsedTimer::add(elapsedTimer t) {
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  _counter += t._counter;
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}
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void elapsedTimer::add_nanoseconds(jlong ns) {
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  jlong freq = os::elapsed_frequency() / NANOUNITS;
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  _counter += ns * freq;
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}
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void elapsedTimer::start() {
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  if (!_active) {
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    _active = true;
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    _start_counter = os::elapsed_counter();
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  }
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}
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void elapsedTimer::stop() {
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  if (_active) {
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    _counter += os::elapsed_counter() - _start_counter;
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    _active = false;
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  }
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}
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double elapsedTimer::seconds() const {
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 return TimeHelper::counter_to_seconds(_counter);
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}
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jlong elapsedTimer::milliseconds() const {
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  return (jlong)TimeHelper::counter_to_millis(_counter);
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}
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jlong elapsedTimer::active_ticks() const {
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  if (!_active) {
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    return ticks();
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  }
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  jlong counter = _counter + os::elapsed_counter() - _start_counter;
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  return counter;
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}
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void TimeStamp::update_to(jlong ticks) {
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  _counter = ticks;
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  if (_counter == 0)  _counter = 1;
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  assert(is_updated(), "must not look clear");
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}
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void TimeStamp::update() {
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  update_to(os::elapsed_counter());
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}
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double TimeStamp::seconds() const {
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  assert(is_updated(), "must not be clear");
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  jlong new_count = os::elapsed_counter();
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  return TimeHelper::counter_to_seconds(new_count - _counter);
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}
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jlong TimeStamp::milliseconds() const {
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  assert(is_updated(), "must not be clear");
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  jlong new_count = os::elapsed_counter();
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  return (jlong)TimeHelper::counter_to_millis(new_count - _counter);
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}
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jlong TimeStamp::ticks_since_update() const {
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  assert(is_updated(), "must not be clear");
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  return os::elapsed_counter() - _counter;
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}
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