XBT_PUBLIC void intrusive_ptr_add_ref(ActivityImpl* activity);
XBT_PUBLIC void intrusive_ptr_release(ActivityImpl* activity);
class ConditionVariableImpl;
class CommImpl;
XBT_PUBLIC void intrusive_ptr_add_ref(ActivityImpl* activity);
XBT_PUBLIC void intrusive_ptr_release(ActivityImpl* activity);
class ConditionVariableImpl;
class CommImpl;