tree 115be50cefbb01dd5bd7e4ba3b7ff3815c8014f9
parent 5a3a61cd3bf16da7cb42e44c3726b5cbb2cdc446
author Robert Oliver <rgoliver@google.com> 1603134394 -0400
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1603908343 +0000

pw_trace: improve locks

Add an internal queue with a separate lock, this is a small section
which just copies the arguments making it suitable for a critical
section.

Emptying this queue is handled from a separate lock, which is a trylock.
If the queue is already being emptied, it is safe to return after adding
to the queue (no need to block).

Change-Id: I45bbf749b2cb8687bb5d8e485adde2256b2c99a8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/21881
Reviewed-by: Paul Mathieu <paulmathieu@google.com>
Commit-Queue: Rob Oliver <rgoliver@google.com>