A timer queue provides the mechanism for calling functions
in the future by way of a callback. It utilizes the MONOTONIC_TIMER
to track time through the boot. The implementation is a min-heap
for keeping track of the next-to-expire callback.
Change-Id: Ia493a284efb3b34e8577e6d3db957169c6d86a1b
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/49753
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
