23  */

    23  */

    24 

    24 

    25 #include "precompiled.hpp"

    25 #include "precompiled.hpp"

    26 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceIdEpoch.hpp"

    26 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceIdEpoch.hpp"

    27 #include "runtime/safepoint.hpp"

    27 #include "runtime/safepoint.hpp"

    29 

    29 

    30 // Alternating epochs on each rotation allow for concurrent tagging.

    30 // Alternating epochs on each rotation allow for concurrent tagging.

    31 // The regular epoch shift happens only during a safepoint.

    31 // The regular epoch shift happens only during a safepoint.

    32 // The fence is there only for the emergency dump case which happens outside of safepoint.

    32 // The fence is there only for the emergency dump case which happens outside of safepoint.

    33 bool JfrTraceIdEpoch::_epoch_state = false;

    33 bool JfrTraceIdEpoch::_epoch_state = false;