jdk

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/*
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 * Copyright (c) 2013, 2022, 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 "runtime/os.hpp"
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#include "utilities/ticks.hpp"
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#if defined(X86) && !defined(ZERO)
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#include "rdtsc_x86.hpp"
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#endif
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template <typename TimeSource, const int unit>
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inline double conversion(typename TimeSource::Type& value) {
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  return (double)value * ((double)unit / (double)TimeSource::frequency());
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}
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uint64_t ElapsedCounterSource::frequency() {
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  static const uint64_t freq = (uint64_t)os::elapsed_frequency();
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  return freq;
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}
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ElapsedCounterSource::Type ElapsedCounterSource::now() {
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  return os::elapsed_counter();
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}
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double ElapsedCounterSource::seconds(Type value) {
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  return conversion<ElapsedCounterSource, 1>(value);
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}
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uint64_t ElapsedCounterSource::milliseconds(Type value) {
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  return (uint64_t)conversion<ElapsedCounterSource, MILLIUNITS>(value);
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}
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uint64_t ElapsedCounterSource::microseconds(Type value) {
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  return (uint64_t)conversion<ElapsedCounterSource, MICROUNITS>(value);
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}
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uint64_t ElapsedCounterSource::nanoseconds(Type value) {
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  return (uint64_t)conversion<ElapsedCounterSource, NANOUNITS>(value);
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}
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uint64_t FastUnorderedElapsedCounterSource::frequency() {
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#if defined(X86) && !defined(ZERO)
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  static bool valid_rdtsc = Rdtsc::initialize();
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  if (valid_rdtsc) {
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    static const uint64_t freq = (uint64_t)Rdtsc::frequency();
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    return freq;
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  }
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#endif
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  static const uint64_t freq = (uint64_t)os::elapsed_frequency();
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  return freq;
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}
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FastUnorderedElapsedCounterSource::Type FastUnorderedElapsedCounterSource::now() {
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#if defined(X86) && !defined(ZERO)
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  static bool valid_rdtsc = Rdtsc::initialize();
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  if (valid_rdtsc) {
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    return Rdtsc::elapsed_counter();
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  }
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#endif
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  return os::elapsed_counter();
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}
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double FastUnorderedElapsedCounterSource::seconds(Type value) {
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  return conversion<FastUnorderedElapsedCounterSource, 1>(value);
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}
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uint64_t FastUnorderedElapsedCounterSource::milliseconds(Type value) {
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  return (uint64_t)conversion<FastUnorderedElapsedCounterSource, MILLIUNITS>(value);
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}
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uint64_t FastUnorderedElapsedCounterSource::microseconds(Type value) {
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  return (uint64_t)conversion<FastUnorderedElapsedCounterSource, MICROUNITS>(value);
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}
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uint64_t FastUnorderedElapsedCounterSource::nanoseconds(Type value) {
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  return (uint64_t)conversion<FastUnorderedElapsedCounterSource, NANOUNITS>(value);
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}
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uint64_t CompositeElapsedCounterSource::frequency() {
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  return ElapsedCounterSource::frequency();
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}
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CompositeElapsedCounterSource::Type CompositeElapsedCounterSource::now() {
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  CompositeTime ct;
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  ct.val1 = ElapsedCounterSource::now();
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#if defined(X86) && !defined(ZERO)
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  static bool initialized = false;
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  static bool valid_rdtsc = false;
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  if (!initialized) {
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    valid_rdtsc = Rdtsc::initialize();
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    initialized = true;
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  }
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  if (valid_rdtsc) {
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    ct.val2 = Rdtsc::elapsed_counter();
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  }
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#endif
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  return ct;
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}
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double CompositeElapsedCounterSource::seconds(Type value) {
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  return conversion<ElapsedCounterSource, 1>(value.val1);
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}
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uint64_t CompositeElapsedCounterSource::milliseconds(Type value) {
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  return (uint64_t)conversion<ElapsedCounterSource, MILLIUNITS>(value.val1);
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}
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uint64_t CompositeElapsedCounterSource::microseconds(Type value) {
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  return (uint64_t)conversion<ElapsedCounterSource, MICROUNITS>(value.val1);
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}
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uint64_t CompositeElapsedCounterSource::nanoseconds(Type value) {
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  return (uint64_t)conversion<ElapsedCounterSource, NANOUNITS>(value.val1);
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}
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