Changeset 77b0a73 in rtems for cpukit/score

2006-03-07 Steven Johnson <sjohnson@…>

PR 850/rtems

• score/src/watchdogtickle.c: A Watchdog (used to timeout an event) with a delay of 1 sometimes does not seem to timeout. The problem occurs, because for whatever reason when the watchdog tickle function executes, the watchdog->delta_interval is 0. it is then decremented before being tested, becomes huge and so doesnt time out. It is thought there is a race condition where the watchdog->delta_interval is calculated by reference to a head (also with a delay of 1). But before it can be added after the head, the head is removed, so the new head now has a delay of 0.