diff options
Diffstat (limited to 'py/scheduler.c')
| -rw-r--r-- | py/scheduler.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/py/scheduler.c b/py/scheduler.c index 2170b9577e..d4cdb59efb 100644 --- a/py/scheduler.c +++ b/py/scheduler.c @@ -88,17 +88,21 @@ static inline void mp_sched_run_pending(void) { #if MICROPY_SCHEDULER_STATIC_NODES // Run all pending C callbacks. - while (MP_STATE_VM(sched_head) != NULL) { - mp_sched_node_t *node = MP_STATE_VM(sched_head); - MP_STATE_VM(sched_head) = node->next; - if (MP_STATE_VM(sched_head) == NULL) { - MP_STATE_VM(sched_tail) = NULL; - } - mp_sched_callback_t callback = node->callback; - node->callback = NULL; - MICROPY_END_ATOMIC_SECTION(atomic_state); - callback(node); - atomic_state = MICROPY_BEGIN_ATOMIC_SECTION(); + mp_sched_node_t *original_tail = MP_STATE_VM(sched_tail); + if (original_tail != NULL) { + mp_sched_node_t *node; + do { + node = MP_STATE_VM(sched_head); + MP_STATE_VM(sched_head) = node->next; + if (MP_STATE_VM(sched_head) == NULL) { + MP_STATE_VM(sched_tail) = NULL; + } + mp_sched_callback_t callback = node->callback; + node->callback = NULL; + MICROPY_END_ATOMIC_SECTION(atomic_state); + callback(node); + atomic_state = MICROPY_BEGIN_ATOMIC_SECTION(); + } while (node != original_tail); // Don't execute any callbacks scheduled during this run } #endif |