unified: API changes to event handling

Allows event objects to pend signals in a cumulative way using
the semaphore in a non-binary way.

Jira: ZEP-928
Change-Id: I3ce8a075ef89309118596ec5781c15d4f3289d34
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
4 files changed