diff options
| -rw-r--r-- | projects/hsm/hsm.c | 5 | ||||
| -rw-r--r-- | task.c | 16 | ||||
| -rw-r--r-- | task.h | 1 |
3 files changed, 21 insertions, 1 deletions
diff --git a/projects/hsm/hsm.c b/projects/hsm/hsm.c index 8a8f441..33342c0 100644 --- a/projects/hsm/hsm.c +++ b/projects/hsm/hsm.c @@ -380,6 +380,11 @@ void hal_task_yield(void) task_yield(); } +void hal_task_yield_maybe(void) +{ + task_yield_maybe(); +} + /* A mutex to arbitrate concurrent access to the keystore. */ task_mutex_t ks_mutex = { 0 }; @@ -83,12 +83,16 @@ static tcb_t *cur_task = NULL; #ifdef DO_TASK_METRICS static uint32_t tick_start = 0; -static uint32_t tick_prev = 0; static uint32_t tick_idle = 0; static uint32_t tick_max = 0; static uint32_t nyield = 0; #endif +static uint32_t tick_prev = 0; +#ifndef TASK_YIELD_THRESHOLD +#define TASK_YIELD_THRESHOLD 100 +#endif + /* Add a task. */ tcb_t *task_add(char *name, funcp_t func, void *cookie, void *stack, size_t stack_len) @@ -221,6 +225,8 @@ void task_yield(void) } tick_prev = tick; ++nyield; +#else + tick_prev = HAL_GetTick(); #endif /* If there are no other runnable tasks (and cur_task is runnable), @@ -256,6 +262,14 @@ void task_yield(void) } } +/* Yield if it's been "too long" since the last yield. + */ +void task_yield_maybe(void) +{ + if (HAL_GetTick() - tick_prev >= TASK_YIELD_THRESHOLD) + task_yield(); +} + /* Put the current task to sleep (make it non-runnable). */ void task_sleep(void) @@ -55,6 +55,7 @@ extern tcb_t *task_add(char *name, funcp_t func, void *cookie, void *stack, size extern void task_set_idle_hook(funcp_t func); extern void task_yield(void); +extern void task_yield_maybe(void); extern void task_sleep(void); extern void task_wake(tcb_t *t); |