package scala.reflect
package runtime
/** This trait overrides methods in reflect.internal, bracketing
* them in synchronized { ... } to make them thread-safe
*/
trait SynchronizedTypes extends internal.Types { self: SymbolTable =>
// No sharing of map objects:
override protected def commonOwnerMap = new CommonOwnerMap
private object uniqueLock
override def unique[T <: Type](tp: T): T = uniqueLock.synchronized { super.unique(tp) }
class SynchronizedUndoLog extends UndoLog {
override def clear() =
synchronized { super.clear() }
override def undo[T](block: => T): T =
synchronized { super.undo(block) }
override def undoUnless(block: => Boolean): Boolean =
synchronized { super.undoUnless(block) }
}
override protected def newUndoLog = new SynchronizedUndoLog
override protected def baseTypeOfNonClassTypeRef(tpe: NonClassTypeRef, clazz: Symbol) =
synchronized { super.baseTypeOfNonClassTypeRef(tpe, clazz) }
private object subsametypeLock
override def isSameType(tp1: Type, tp2: Type): Boolean =
subsametypeLock.synchronized { super.isSameType(tp1, tp2) }
override def isDifferentType(tp1: Type, tp2: Type): Boolean =
subsametypeLock.synchronized { super.isDifferentType(tp1, tp2) }
override def isSubType(tp1: Type, tp2: Type, depth: Int): Boolean =
subsametypeLock.synchronized { super.isSubType(tp1, tp2, depth) }
private object lubglbLock
override def glb(ts: List[Type]): Type =
lubglbLock.synchronized { super.glb(ts) }
override def lub(ts: List[Type]): Type =
lubglbLock.synchronized { super.lub(ts) }
private object indentLock
override protected def explain[T](op: String, p: (Type, T) => Boolean, tp1: Type, arg2: T): Boolean = {
indentLock.synchronized { super.explain(op, p, tp1, arg2) }
}
private object toStringLock
override protected def typeToString(tpe: Type): String =
toStringLock.synchronized(super.typeToString(tpe))
/* The idea of caches is as follows.
* When in reflexive mode, a cache is either null, or one sentinal
* value representing undefined or the final defined
* value. Hence, we can ask in non-synchronized ode whether the cache field
* is non null and different from the sentinel (if a sentinel exists).
* If that's true, the cache value is current.
* Otherwise we arrive in one of the defined... methods listed below
* which go through all steps in synchronized mode.
*/
override protected def defineUnderlyingOfSingleType(tpe: SingleType) =
tpe.synchronized { super.defineUnderlyingOfSingleType(tpe) }
override protected def defineBaseTypeSeqOfCompoundType(tpe: CompoundType) =
tpe.synchronized { super.defineBaseTypeSeqOfCompoundType(tpe) }
override protected def defineBaseClassesOfCompoundType(tpe: CompoundType) =
tpe.synchronized { super.defineBaseClassesOfCompoundType(tpe) }
override protected def defineParentsOfTypeRef(tpe: TypeRef) =
tpe.synchronized { super.defineParentsOfTypeRef(tpe) }
override protected def defineBaseTypeSeqOfTypeRef(tpe: TypeRef) =
tpe.synchronized { super.defineBaseTypeSeqOfTypeRef(tpe) }
}