/*
* Copyright ( c ) 2013 , 2022 , 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.inline.hpp"
#if defined (X86) && !defined (ZERO)
#include "rdtsc_x86.hpp"
#endif
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
}
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(vorverarbeitet am 2026-09-07)
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