tree 8d55f320882b6b1a37ec0c183878630b6be96124
parent 117307db2685528b5ec5e5a6cf7f0b99899f7427
author Adrian Danis <adanis@google.com> 1544998543 +1100
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1545000089 +0000

[wait_queue] Method to peek the wait queue head

Adds a method to peek the thread that is at the head of the wait queue.
Updates the C++ WaitQueue wrapper and brings back some previously removed wrappers.

Test: Still compiles. No functional changes.
Change-Id: I5244c13bc1ef7ae53c23d27bb3cc5977d9fbd990