delete cv;
}
+void ModelAction::copy_from_new(ModelAction *newaction) {
+ seq_number=newaction->seq_number;
+}
+
+bool ModelAction::is_mutex_op() const {
+ return type == ATOMIC_LOCK || type == ATOMIC_TRYLOCK || type == ATOMIC_UNLOCK;
+}
+
+bool ModelAction::is_lock() const {
+ return type == ATOMIC_LOCK;
+}
+
+bool ModelAction::is_unlock() const {
+ return type == ATOMIC_UNLOCK;
+}
+
+bool ModelAction::is_trylock() const {
+ return type == ATOMIC_TRYLOCK;
+}
+
+bool ModelAction::is_success_lock() const {
+ return type == ATOMIC_LOCK || (type == ATOMIC_TRYLOCK && value == VALUE_TRYSUCCESS);
+}
+
+bool ModelAction::is_failed_trylock() const {
+ return (type == ATOMIC_TRYLOCK && value == VALUE_TRYFAILED);
+}
+
bool ModelAction::is_read() const
{
return type == ATOMIC_READ || type == ATOMIC_RMWR || type == ATOMIC_RMW;
return type == ATOMIC_RMWC;
}
+bool ModelAction::is_fence() const
+{
+ return type == ATOMIC_FENCE;
+}
+
bool ModelAction::is_initialization() const
{
return type == ATOMIC_INIT;
return false;
}
-void ModelAction::create_cv(const ModelAction *parent)
+bool ModelAction::is_conflicting_lock(const ModelAction *act) const
{
- if (cv)
- delete cv;
+ //Must be different threads to reorder
+ if (same_thread(act))
+ return false;
+
+ //Try to reorder a lock past a successful lock
+ if (act->is_success_lock())
+ return true;
+
+ //Try to push a successful trylock past an unlock
+ if (act->is_unlock() && is_trylock() && value == VALUE_TRYSUCCESS)
+ return true;
+
+ return false;
+}
+/**
+ * Create a new clock vector for this action. Note that this function allows a
+ * user to clobber (and leak) a ModelAction's existing clock vector. A user
+ * should ensure that the vector has already either been rolled back
+ * (effectively "freed") or freed.
+ *
+ * @param parent A ModelAction from which to inherit a ClockVector
+ */
+void ModelAction::create_cv(const ModelAction *parent)
+{
if (parent)
cv = new ClockVector(parent->cv, this);
else
cv = new ClockVector(NULL, this);
}
+void ModelAction::set_try_lock(bool obtainedlock) {
+ if (obtainedlock)
+ value=VALUE_TRYSUCCESS;
+ else
+ value=VALUE_TRYFAILED;
+}
+
/** Update the model action's read_from action */
void ModelAction::read_from(const ModelAction *act)
{
ASSERT(cv);
reads_from = act;
if (act != NULL && this->is_acquire()) {
- std::vector<const ModelAction *> release_heads;
+ rel_heads_list_t release_heads;
model->get_release_seq_heads(this, &release_heads);
for (unsigned int i = 0; i < release_heads.size(); i++)
- synchronize_with(release_heads[i]);
+ if (!synchronize_with(release_heads[i]))
+ model->set_bad_synchronization();
}
}
* Synchronize the current thread with the thread corresponding to the
* ModelAction parameter.
* @param act The ModelAction to synchronize with
+ * @return True if this is a valid synchronization; false otherwise
*/
-void ModelAction::synchronize_with(const ModelAction *act) {
- ASSERT(*act < *this);
+bool ModelAction::synchronize_with(const ModelAction *act) {
+ if (*this < *act && type != THREAD_JOIN && type != ATOMIC_LOCK)
+ return false;
model->check_promises(cv, act->cv);
cv->merge(act->cv);
+ return true;
}
bool ModelAction::has_synchronized_with(const ModelAction *act) const
case ATOMIC_RMW:
type_str = "atomic rmw";
break;
+ case ATOMIC_FENCE:
+ type_str = "fence";
+ break;
case ATOMIC_RMWR:
type_str = "atomic rmwr";
break;
case ATOMIC_INIT:
type_str = "init atomic";
break;
+ case ATOMIC_LOCK:
+ type_str = "lock";
+ break;
+ case ATOMIC_UNLOCK:
+ type_str = "unlock";
+ break;
+ case ATOMIC_TRYLOCK:
+ type_str = "trylock";
+ break;
default:
type_str = "unknown type";
}