What are the usage of Latches ?

Latch can delay the progress of threads until it reaches its terminal state.
Once latch reaches the terminal state, the state cannot be changed.

Use of latch

• to ensure that certain activities do not proceed until other activities complete

Use cases

• to wait for all the players ready in a mutliplayer game
• to ensure that a computation doesn't proceed until required resources have been initialized
• to ensure that a service doesn't start until other services on which it depends have started