src/hotspot/share/runtime/objectMonitor.inline.hpp

rev 54572 : Checkpoint latest preliminary review patches for full OpenJDK review; merge with 8222295.patch.
rev 54573 : imported patch dcubed.monitor_deflate_conc.v2.01
rev 54574 : imported patch dcubed.monitor_deflate_conc.v2.02

*** 161,179 ****
  
  inline void ObjectMonitor::dec_ref_count() {
    // The decrement only needs to be MO_ACQ_REL since the reference
    // counter is volatile.
    Atomic::dec(&_ref_count);
!   guarantee(_ref_count >= 0, "sanity check: ref_count=%d", _ref_count);
  }
  
  inline void ObjectMonitor::inc_ref_count() {
    // The increment needs to be MO_SEQ_CST so that the reference
    // counter update is seen as soon as possible in a race with the
    // async deflation protocol.
    Atomic::inc(&_ref_count);
!   guarantee(_ref_count > 0, "sanity check: ref_count=%d", _ref_count);
  }
  
  inline jint ObjectMonitor::ref_count() const {
    return OrderAccess::load_acquire(&_ref_count);
  }
--- 161,183 ----
  
  inline void ObjectMonitor::dec_ref_count() {
    // The decrement only needs to be MO_ACQ_REL since the reference
    // counter is volatile.
    Atomic::dec(&_ref_count);
!   // Can be negative as part of async deflation protocol.
!   guarantee(AsyncDeflateIdleMonitors || _ref_count >= 0,
!             "sanity check: ref_count=%d", _ref_count);
  }
  
  inline void ObjectMonitor::inc_ref_count() {
    // The increment needs to be MO_SEQ_CST so that the reference
    // counter update is seen as soon as possible in a race with the
    // async deflation protocol.
    Atomic::inc(&_ref_count);
!   // Can be negative as part of async deflation protocol.
!   guarantee(AsyncDeflateIdleMonitors || _ref_count > 0,
!             "sanity check: ref_count=%d", _ref_count);
  }
  
  inline jint ObjectMonitor::ref_count() const {
    return OrderAccess::load_acquire(&_ref_count);
  }