Method nested_arena_exit

benchmarks/tbb/arena.cpp:587–614

}

void generic_scheduler::nested_arena_exit(nested_arena_context& c) {
    if( my_arena == c.my_orig_state.my_arena ) {
#if __TBB_TASK_GROUP_CONTEXT
        free_task<small_local_task>(*(task*)c.my_orig_ptr); // TODO: use scoped_task instead?
#endif
        return;
    }
    if( c.my_adjusting ) my_arena->my_market->adjust_demand(*my_arena, 1);
#if __TBB_ARENA_OBSERVER
    my_arena->my_observers.notify_exit_observers( my_last_local_observer, /*worker=*/false );
#endif /* __TBB_SCHEDULER_OBSERVER */

#if __TBB_TASK_PRIORITY
    if ( my_offloaded_tasks )
        my_arena->orphan_offloaded_tasks( *this );
    my_local_reload_epoch = *c.my_orig_state.my_ref_reload_epoch;
    while ( as_atomic(my_arena->my_slots[0].my_scheduler).compare_and_swap( NULL, this) != this )
        __TBB_Yield(); // TODO: task priority can use master slot for locking while accessing the scheduler
#else
    // Free the master slot. TODO: support multiple masters
    __TBB_store_with_release(my_arena->my_slots[0].my_scheduler, (generic_scheduler*)NULL);
#endif
    my_arena->my_exit_monitors.notify_all_relaxed(); // TODO: fix concurrent monitor to use notify_one (test MultipleMastersPart4 fails)
#if __TBB_TASK_GROUP_CONTEXT
    // restore context of dummy task
    my_dummy_task->prefix().context = (task_group_context*)c.my_orig_ptr;
#endif
}

void generic_scheduler::wait_until_empty() {
    my_dummy_task->prefix().ref_count++; // prevents exit from local_wait_for_all when local work is done enforcing the stealing