+bool SimcallObserver::depends(SimcallObserver* other)
+{
+ THROW_UNIMPLEMENTED;
+}
+/* Random is only dependent when issued by the same actor (ie, always independent) */
+bool RandomSimcall::depends(SimcallObserver* other)
+{
+ return get_issuer() == other->get_issuer();
+}
+bool MutexSimcall::depends(SimcallObserver* other)
+{
+ if (dynamic_cast<RandomSimcall*>(other) != nullptr)
+ return other->depends(this); /* Other is random, that is very permissive. Use that relation instead. */
+
+#if 0 /* This code is currently broken and shouldn't be used. We must implement asynchronous locks before */
+ MutexSimcall* that = dynamic_cast<MutexSimcall*>(other);
+ if (that == nullptr)
+ return true; // Depends on anything we don't know
+
+ /* Theorem 4.4.7: Any pair of synchronization actions of distinct actors concerning distinct mutexes are independent */
+ if (this->get_issuer() != that->get_issuer() && this->get_mutex() != that->get_mutex())
+ return false;
+
+ /* Theorem 4.4.8 An AsyncMutexLock is independent with a MutexUnlock of another actor */
+ if (((dynamic_cast<MutexLockSimcall*>(this) != nullptr && dynamic_cast<MutexUnlockSimcall*>(that)) ||
+ (dynamic_cast<MutexLockSimcall*>(that) != nullptr && dynamic_cast<MutexUnlockSimcall*>(this))) &&
+ get_issuer() != other->get_issuer())
+ return false;
+#endif
+ return true; // Depend on things we don't know for sure that they are independent
+}
+