fix a tick list add bug

fix a tick list add bug: if a lower priority task has the same tick_expires with a higher priority task in the tick list, the lower should be added behind the higher one.
2019-09-23 20:40:31 +08:00
parent 45e8c1e6af
commit 4cfe60a9cb
3 changed files with 6 additions and 2 deletions
--- a/kernel/core/tos_tick.c
+++ b/kernel/core/tos_tick.c
@@ -18,6 +18,10 @@ __STATIC__ void tick_task_place(k_task_t *task, k_tick_t timeout)
        if (task->tick_expires < curr_expires) {
            break;
        }
+        if (task->tick_expires == curr_expires &&
+            task->prio < curr_task->prio) {
+            break;
+        }
        prev_expires = curr_expires;
    }
    task->tick_expires -= prev_expires;