/*

 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "precompiled.hpp"

#include "jfr/utilities/jfrTime.hpp"

#include "runtime/os.hpp"

#if defined(X86) && !defined(ZERO)

#include "rdtsc_x86.hpp"

#endif

#include OS_HEADER_INLINE(os)

bool JfrTime::_ft_enabled = false;

bool JfrTime::initialize() {

  static bool initialized = false;

  if (!initialized) {

#if defined(X86) && !defined(ZERO)

    _ft_enabled = Rdtsc::initialize();

#else

    _ft_enabled = false;

#endif

    initialized = true;

  }

  return initialized;

}

bool JfrTime::is_ft_supported() {

#if defined(X86) && !defined(ZERO)

  return Rdtsc::is_supported();

#else

  return false;

#endif

}

const void* JfrTime::time_function() {

#if defined(X86) && !defined(ZERO)

  return _ft_enabled ? (const void*)Rdtsc::elapsed_counter : (const void*)os::elapsed_counter;

#else

  return (const void*)os::elapsed_counter;

#endif

}

jlong JfrTime::frequency() {

#if defined(X86) && !defined(ZERO)

  return _ft_enabled ? Rdtsc::frequency() : os::elapsed_frequency();

#else

  return os::elapsed_frequency();

#endif

}