internal TransientModule GetModule(ScriptContext /*!*/ context, DTypeDesc caller, string /*!*/ code, SourceCodeDescriptor descriptor)
{
Debug.Assert(context != null && code != null);
Key key = new Key(code, descriptor);
Value value;
rwLock.EnterUpgradeableReadLock();
try
{
if (cache.TryGetValue(key, out value))
{
if (TypesProvider.LoadAndMatch(value.TypeDependencies, context, caller))
{
#if !SILVERLIGHT
Performance.Increment(Performance.DynamicCacheHits);
#endif
return(value.Module);
}
else
{
// invalidate the cache entry, because type dependencies were changed:
rwLock.EnterWriteLock();
try
{
cache.Remove(key);
}
finally
{
rwLock.ExitWriteLock();
}
}
}
}
finally
{
rwLock.ExitUpgradeableReadLock();
}
return(null);
}