280       return candidate;

   280       return candidate;

   281     }

   281     }

   282   }

   282   }

   283   return NULL;

   283   return NULL;

   284 }

   284 }

   291 

   285 

   292 //////////////////////////////////////////////////////////////////////////////

   286 //////////////////////////////////////////////////////////////////////////////

   293 // Allocation

   287 // Allocation

   294 //

   288 //

   295 // Allocation involves the _allocate_list, which contains a subset of the

   289 // Allocation involves the _allocate_list, which contains a subset of the

   726     _storage->_concurrent_iteration_active = value;

   720     _storage->_concurrent_iteration_active = value;

   727   }

   721   }

   728 }

   722 }

   729 

   723 

   730 void OopStorage::BasicParState::ensure_iteration_started() {

   724 void OopStorage::BasicParState::ensure_iteration_started() {

   732   assert(!_concurrent || _storage->_concurrent_iteration_active, "invariant");

   728   assert(!_concurrent || _storage->_concurrent_iteration_active, "invariant");

   733   // Ensure _next_block is not the not_started_marker, setting it to

   729   // Ensure _next_block is not the not_started_marker, setting it to

   734   // the _active_head to start the iteration if necessary.

   730   // the _active_head to start the iteration if necessary.

   735   if (OrderAccess::load_acquire(&_next_block) == not_started_marker) {

   731   if (OrderAccess::load_acquire(&_next_block) == not_started_marker) {

   736     Atomic::cmpxchg(_storage->_active_head, &_next_block, not_started_marker);

   732     Atomic::cmpxchg(_storage->_active_head, &_next_block, not_started_marker);