tree dab012acc82d2ac01a145c692dcb0444fedc9e02
parent f3e6cc7777245e8a3a8aeaf6ec48c1247a0136cf
author Edwin Kempin <ekempin@google.com> 1559131102 +0200
committer Edwin Kempin <ekempin@google.com> 1560423600 +0200

Unset logging context before returning a thread back to the thread pool

After doing work in a thread and before returning it to the thread pool
we must clean up its LoggingContext. To do this we currently remember
the existing LoggingContext when we get the thread and set it back when
we return the thread.

Since we expect that the provided thread always has an empty
LoggingContext (and it's a bug if it's non-empty), it's simpler and
safer to just unset the LoggingContext before we return the thread to
the thread pool.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I4cf614068679831c6dfdcc794c7e6beb0e66be47