commit 570c2919f576c333490277aac3c1e46944d4fc89
author Matt Rosencrantz <mattr@google.com> Thu Oct 22 16:01:48 2015 -0700
committer Matt Rosencrantz <mattr@google.com> Thu Oct 22 16:01:48 2015 -0700
tree a7f6aa8c2f9f4c2a3a5e4d41741b89e8e0bfd374
parent 37a243e2cb5431e4eabdea91218bc7596d63b311

runtime/internal/flow/conn: Fix flow control accounting when flows
close..

Previously we were sometimes loosing shared tokens when a flow closed
with borrowed tokens outstanding.  This happened in two ways:

1. When the remote end closed a flow it didn't release the counts
remaining in it's readq.
2. If the local end closes the flow with outstanding borrowed counts
then an incoming release message will not find the flow in the map and
so we'll just skip it's release and the borrowed counts will never be
returned.

This fix addresses those issues by not removing a flow from the flow map
until all its borrowed counters have been released, and by assuming that
a close flow message means the other end has erased its buffer.

Change-Id: Ic6b433890c973a6d1e6637d535aca0f52582f392