141     _sampler(sampler), _context(context) {  in OSThreadSamplerCallback()
144     _sampler.protected_task(_context);  in call()
147   OSThreadSampler& _sampler;  member in OSThreadSamplerCallback
566 JfrThreadSampling::JfrThreadSampling() : _sampler(NULL) {}  in JfrThreadSampling()
569   if (_sampler != NULL) {  in ~JfrThreadSampling()
570     _sampler->disenroll();  in ~JfrThreadSampling()
579   assert(_sampler == NULL, "invariant");  in start_sampler()
581   _sampler = new JfrThreadSampler(interval_java, interval_native, JfrOptionSet::stackdepth());  in start_sampler()
582   _sampler->start_thread();  in start_sampler()
583   _sampler->enroll();  in start_sampler()
589   if (_sampler != NULL) {  in set_sampling_interval()
590     interval_java = _sampler->get_java_interval();  in set_sampling_interval()
591     interval_native = _sampler->get_native_interval();  in set_sampling_interval()
599     if (_sampler == NULL) {  in set_sampling_interval()
603       _sampler->set_java_interval(interval_java);  in set_sampling_interval()
604       _sampler->set_native_interval(interval_native);  in set_sampling_interval()
605       _sampler->enroll();  in set_sampling_interval()
607     assert(_sampler != NULL, "invariant");  in set_sampling_interval()
609   } else if (_sampler != NULL) {  in set_sampling_interval()
610     _sampler->disenroll();  in set_sampling_interval()