private bool TryGetResult(TArg arg, out Memoizer <TArg, TResult> .Result result)
{
this._lock.EnterReadLock();
try
{
return(this._resultCache.TryGetValue(arg, out result));
}
finally
{
this._lock.ExitReadLock();
}
}
internal TResult Evaluate(TArg arg)
{
Memoizer <TArg, TResult> .Result result;
if (!this.TryGetResult(arg, out result))
{
this._lock.EnterWriteLock();
try
{
if (!this._resultCache.TryGetValue(arg, out result))
{
result = new Memoizer <TArg, TResult> .Result((Func <TResult>)(() => this._function(arg)));
this._resultCache.Add(arg, result);
}
}
finally
{
this._lock.ExitWriteLock();
}
}
return(result.GetValue());
}