}
}
+/** @brief returns if there this transition can proceed in a finite amount of time
+ *
+ * It is used in the model-checker to not get into self-deadlock where it would execute a never ending transition.
+ *
+ * Only WAIT operations (on comm, on mutex, etc) can ever return false because they could lock the MC exploration.
+ * Wait operations are OK and return true in only two situations:
+ * - if the wait will succeed immediately (if both peer of the comm are there already or if the mutex is available)
+ * - if a timeout is provided, because we can fire the timeout if the transition is not ready without blocking in this transition for ever.
+ *
+ */
// Called from both MCer and MCed:
bool request_is_enabled(smx_simcall_t req)
{
case SIMCALL_NONE:
return false;
+ case SIMCALL_SEM_ACQUIRE:
+ xbt_die("Don't use semaphores in model-checked code, it's not supported yet");
+ case SIMCALL_COND_WAIT:
+ xbt_die("Don't use condition variables in model-checked code, it's not supported yet");
+
case SIMCALL_COMM_WAIT:
{
/* FIXME: check also that src and dst processes are not suspended */
return false;
}
- case SIMCALL_MUTEX_TRYLOCK:
- return true;
-
case SIMCALL_MUTEX_LOCK: {
smx_mutex_t mutex = simcall_mutex_lock__get__mutex(req);
#if HAVE_MC