friend kernel::activity::ConditionVariableImpl;
kernel::activity::ConditionVariableImpl* const cond_;
friend kernel::activity::ConditionVariableImpl;
kernel::activity::ConditionVariableImpl* const cond_;
ConditionVariable(ConditionVariable const&) = delete;
ConditionVariable& operator=(ConditionVariable const&) = delete;
ConditionVariable(ConditionVariable const&) = delete;
ConditionVariable& operator=(ConditionVariable const&) = delete;