Sean Dague df35680b67 add watchdog module ... This provides the watchdog.watch function which is a contextmanager that can be used before doing operations that have a high risk of deadlocking or aberrantly taking huge amounts of time to complete (which could be the root cause for other issues). Unit tests require the use of sleep to make the timers pop either before or after the event in question. There is 1 second buffer that's encoded into each scenario which should be sufficient for unit tests (even in busy systems). If that turns into an issue later, the buffer can be increased (I was only seeing real skew of 1-2 ms locally). Change-Id: I79e39f8a4aa702627ca39bea3e6fc672134b8a72		2015-01-09 15:38:48 -05:00
..
source	add watchdog module	2015-01-09 15:38:48 -05:00