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 "gc/shared/satbMarkQueue.hpp"
  27 #include "gc/shared/collectedHeap.hpp"
  28 #include "logging/log.hpp"
  29 #include "memory/allocation.inline.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "runtime/atomic.hpp"
  32 #include "runtime/mutexLocker.hpp"
  33 #include "runtime/orderAccess.hpp"
  34 #include "runtime/os.hpp"
  35 #include "runtime/safepoint.hpp"
  36 #include "runtime/thread.hpp"
  37 #include "runtime/threadSMR.hpp"
  38 #include "runtime/vmThread.hpp"
  39 #include "utilities/globalCounter.inline.hpp"
  40 
  41 SATBMarkQueue::SATBMarkQueue(SATBMarkQueueSet* qset) :
  42   // SATB queues are only active during marking cycles. We create
  43   // them with their active field set to false. If a thread is
  44   // created during a cycle and its SATB queue needs to be activated
  45   // before the thread starts running, we'll need to set its active
  46   // field to true. This must be done in the collector-specific
  47   // BarrierSet thread attachment protocol.
  48   PtrQueue(qset, false /* active */)
  49 { }
  50 
  51 void SATBMarkQueue::flush() {
  52   // Filter now to possibly save work later.  If filtering empties the
  53   // buffer then flush_impl can deallocate the buffer.

  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 "gc/shared/satbMarkQueue.hpp"
  27 #include "gc/shared/collectedHeap.hpp"
  28 #include "logging/log.hpp"
  29 #include "memory/allocation.inline.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "runtime/atomic.hpp"
  32 #include "runtime/mutexLocker.hpp"

  33 #include "runtime/os.hpp"
  34 #include "runtime/safepoint.hpp"
  35 #include "runtime/thread.hpp"
  36 #include "runtime/threadSMR.hpp"
  37 #include "runtime/vmThread.hpp"
  38 #include "utilities/globalCounter.inline.hpp"
  39 
  40 SATBMarkQueue::SATBMarkQueue(SATBMarkQueueSet* qset) :
  41   // SATB queues are only active during marking cycles. We create
  42   // them with their active field set to false. If a thread is
  43   // created during a cycle and its SATB queue needs to be activated
  44   // before the thread starts running, we'll need to set its active
  45   // field to true. This must be done in the collector-specific
  46   // BarrierSet thread attachment protocol.
  47   PtrQueue(qset, false /* active */)
  48 { }
  49 
  50 void SATBMarkQueue::flush() {
  51   // Filter now to possibly save work later.  If filtering empties the
  52   // buffer then flush_impl can deallocate the buffer.