(我认为)互斥锁的共识数是2.
信号量的共识数是多少(如pthread_sem_*)？
条件变量的共识数是多少(如pthread_cond_*)？
synchronization mutex semaphore pthreads condition-variable
condition-variable ×1
mutex ×1
pthreads ×1
semaphore ×1
synchronization ×1