mutex 4 semaphore 3 lock 3 read-write-lock 2 synchronization 2 deficit round-robin 1 fair semaphore 1 fair mutex 1 barrier 1 cyclic barrier 1 pubsub 1 publish 1 subscribe 1 lightswitch 1 read-write lock 1 blocking-queue 1 cyclic-barrier 1 deficit-round-robin 1 fair-mutex 1 fair-queue 1 fair-semaphore 1 ddr-queue 1 fair queue 1 blocking queue 1 queue 1 condition variable 1 condition 1 signal 1 typescript 1 ruby 1 await 1 async 1 concurrency 1 monitor 1 locks 1 coroutine 1