diff options
| author | Keith Packard <keithp@keithp.com> | 2009-12-19 15:31:36 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2009-12-19 15:31:36 -0800 |
| commit | eddb82390a0ecb07ef83c04861993842906b03ab (patch) | |
| tree | 3986d81b2d7281ecb96e499d6ddfb17fcac210de | |
| parent | 598d168bd6552c3756e4b0267de44147eadab9f6 (diff) | |
Ensure that ao_alarm waits at least the specified time
Because the timer tick may happen soon, it's important to delay by
another tick to ensure that we don't wake up early.
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | src/ao_task.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/ao_task.c b/src/ao_task.c index 4664163d..4a78766e 100644 --- a/src/ao_task.c +++ b/src/ao_task.c @@ -217,7 +217,10 @@ ao_wakeup(__xdata void *wchan) void ao_alarm(uint16_t delay) { - if (!(ao_cur_task->alarm = ao_time() + delay)) + /* Make sure we sleep *at least* delay ticks, which means adding + * one to account for the fact that we may be close to the next tick + */ + if (!(ao_cur_task->alarm = ao_time() + delay + 1)) ao_cur_task->alarm = 1; } |