tree 63f9a1d07a74fb8051b1d6c1bb2971da126cc73a
parent 1dcd8f4116397e8edc82bd77434533211efcae39
author Tej Singh <singhtejinder@google.com> 1586601552 -0700
committer Tej Singh <singhtejinder@google.com> 1586908212 -0700

Add NamedLatch to statsd

This is a sychronizing primitive that is similar to a latch, but a
thread must count down with an identifier. It will be used to make sure
the boot complete, uid map, and all pullers signals are received before
triggering the bucket split.

The latch's countDown operation takes in a string identifier, so that if
the same operation happens twice, it is only counted once.

Bug: 144099206
Test: atest statsd_test

Change-Id: I261a3e50eabbc4998ca30ddf2d67a9a1e788911e