9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "runtime/orderAccess.inline.hpp"
27 #include "trace/tracingExport.hpp"
28
29 // Allow lock-free access to _sampler_thread.
30 Thread* volatile TracingExport::_sampler_thread = NULL;
31
32 Thread* TracingExport::get_sampler_thread() {
33 return (Thread*)OrderAccess::load_acquire(&_sampler_thread);
34 }
35
36 void TracingExport::set_sampler_thread(Thread* thread) {
37 OrderAccess::release_store_fence(&_sampler_thread, thread);
38 }
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "runtime/orderAccess.inline.hpp"
27 #include "trace/tracingExport.hpp"
28
29 // Allow lock-free reads of _sampler_thread.
30 Thread* volatile TracingExport::_sampler_thread = NULL;
31
32 Thread* TracingExport::sampler_thread_acquire() {
33 return (Thread*)OrderAccess::load_acquire(&_sampler_thread);
34 }
35
36 void TracingExport::set_sampler_thread_with_lock(Thread* thread) {
37 // Grab Threads_lock to avoid conflicts with Thread-SMR scans.
38 MutexLocker ml(Threads_lock);
39 _sampler_thread = thread;
40 }
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