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AbstractQueuedSynchronizer (AQS) source code detailed analysis - CountDownLatch source code analysis 1. CountDownLatch introduction CountDownLatch is a simple synchronizer. It means that one or more threads are allowed to wait for the operation of other threads to complete before performing subsequent operations. Common usage of CountDownLat ...

1. Overview CountDownLatch is a synchronizer tool class, which is used to coordinate the synchronization between multiple threads. It can make a thread continue to execute after waiting for other threads to complete their work. It cannot be reset. 2. Realize A counter is used for implementation. The initial value of the counter is the number ...

CountDownLatch principle CountDownLatch is implemented through a counter whose initialization value is the number of threads. Each time a thread completes its task, the value of the counter is reduced by 1. When the counter reaches 0, it indicates that all threads have completed the task, and then the thread waiting on the lock can resume exec ...