ao_add_task(__xdata struct ao_task * task, void (*start)(void), __code char *name) __reentrant
{
uint8_t __xdata *stack;
+ uint8_t task_id;
+ uint8_t t;
if (ao_num_tasks == AO_NUM_TASKS)
ao_panic(AO_PANIC_NO_TASK);
+ for (task_id = 1; task_id != 0; task_id++) {
+ for (t = 0; t < ao_num_tasks; t++)
+ if (ao_tasks[t]->task_id == task_id)
+ break;
+ if (t == ao_num_tasks)
+ break;
+ }
ao_tasks[ao_num_tasks++] = task;
- task->task_id = ao_num_tasks;
+ task->task_id = task_id;
task->name = name;
/*
* Construct a stack frame so that it will 'return'
push _bp
_endasm;
- if (ao_cur_task_index != AO_NO_TASK_INDEX)
+ if (ao_cur_task_index == AO_NO_TASK_INDEX)
+ ao_cur_task_index = ao_num_tasks-1;
+ else
{
uint8_t stack_len;
__data uint8_t *stack_ptr;
break;
}
+ /* Check if the alarm is set for a time which has passed */
+ if (ao_cur_task->alarm &&
+ (int16_t) (ao_time() - ao_cur_task->alarm) >= 0) {
+ ao_cur_task_index = ao_next_task_index;
+ break;
+ }
+
/* Enter lower power mode when there isn't anything to do */
if (ao_next_task_index == ao_cur_task_index)
PCON = PCON_IDLE;
_endasm;
}
-void
+uint8_t
ao_sleep(__xdata void *wchan)
{
__critical {
ao_cur_task->wchan = wchan;
}
ao_yield();
+ if (ao_cur_task->wchan) {
+ ao_cur_task->wchan = NULL;
+ ao_cur_task->alarm = 0;
+ return 1;
+ }
+ ao_cur_task->alarm = 0;
+ return 0;
}
void
ao_tasks[i]->wchan = NULL;
}
+void
+ao_alarm(uint16_t 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;
+}
+
+void
+ao_wake_task(__xdata struct ao_task *task)
+{
+ task->wchan = NULL;
+}
+
+void
+ao_exit(void) __critical
+{
+ uint8_t i;
+ ao_num_tasks--;
+ for (i = ao_cur_task_index; i < ao_num_tasks; i++)
+ ao_tasks[i] = ao_tasks[i+1];
+ ao_cur_task_index = AO_NO_TASK_INDEX;
+ ao_yield();
+ /* we'll never get back here */
+}
+
void
ao_task_info(void)
{