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| author | Jim Mussared <jim.mussared@gmail.com> | 2020-04-03 13:16:28 +1100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2020-04-13 21:55:47 +1000 |
| commit | 8470cd0be90de03ba38103db69d134c8915bc114 (patch) | |
| tree | 8568e6f470ed38a548f6ddefb0f3228e6519c980 /py/scheduler.c | |
| parent | 243805d776a19b16545d542b2f51ae88b6e314fe (diff) | |
py/scheduler: Add assert that scheduler is locked when unlocking.
And add a test that shows how this can happen when multiple threads are
accessing the scheduler, which fails if atomic sections are not used.
Diffstat (limited to 'py/scheduler.c')
| -rw-r--r-- | py/scheduler.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/py/scheduler.c b/py/scheduler.c index d4d797508..b559091b8 100644 --- a/py/scheduler.c +++ b/py/scheduler.c @@ -108,6 +108,7 @@ void mp_sched_lock(void) { void mp_sched_unlock(void) { mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION(); + assert(MP_STATE_VM(sched_state) < 0); if (++MP_STATE_VM(sched_state) == 0) { // vm became unlocked if (MP_STATE_VM(mp_pending_exception) != MP_OBJ_NULL || mp_sched_num_pending()) { |