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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
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* under the terms of the GNU General Public License version 2 only , as
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*
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* 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 ) .
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* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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#ifndef SHARE_JFR_SUPPORT_JFRTHREADID_INLINE_HPP
#define SHARE_JFR_SUPPORT_JFRTHREADID_INLINE_HPP
#include "jfr/support/jfrThreadId.hpp"
#include "classfile/javaClasses.inline.hpp"
#include "jfr/recorder/checkpoint/types/traceid/jfrTraceIdEpoch.hpp"
#include "jfr/utilities/jfrTypes.hpp"
#include "memory/allocation.inline.hpp"
static constexpr const u2 excluded_bit = 32768 ;
static constexpr const u2 epoch_mask = excluded_bit - 1 ;
class ThreadIdAccess : AllStatic {
public :
static traceid id(oop ref) {
return static_cast <traceid>(java_lang_Thread::thread_id(ref));
}
static bool is_excluded(oop ref) {
return epoch(ref) & excluded_bit;
}
static void include(oop ref) {
assert(is_excluded(ref), "invariant" );
set_epoch(ref, epoch(ref) ^ excluded_bit);
}
static void exclude(oop ref) {
set_epoch(ref, excluded_bit | epoch(ref));
}
static u2 epoch(oop ref) {
return java_lang_Thread::jfr_epoch(ref);
}
static void set_epoch(oop ref, u2 epoch) {
java_lang_Thread::set_jfr_epoch(ref, epoch);
}
static u2 current_epoch() {
return JfrTraceIdEpoch::epoch_generation();
}
};
#endif // SHARE_JFR_SUPPORT_JFRTHREADID_INLINE_HPP
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