I am currently handling some setup of an object on a background thread (I am using a concurrent queue within the following initWithDocumentFileURL method):+ (TWReaderDocument *)initWithDocumentFileURL:(NSURL *)url withLoadingCompletionBlock:(loadingCompletionBlock)completionBlock{ __block NSError *error;TWReaderDocument * twDoc = [[TWReaderDocument alloc] init];twDoc.status = ReaderDocCreated;twDoc.doc = [ReaderDocument withDocumentFilePath:[url path] withURL:url withLoadingCompletionBLock:^(NSError *_error) {    if (_error)    {        _error = error;        twDoc.status = ReaderDocReady;    }    else twDoc.status = ReaderDocFailed;}];//completionBlock(error);return twDoc;}Header@property (nonatomic, assign, readonly) TWReaderDocumentStatus status;Implementation- (TWReaderDocumentStatus) status {    __block TWReaderDocumentStatus readStatus;    dispatch_sync([ReaderDocument concurrentLoadingQueue], ^{        readStatus = _status;    });    return readStatus;}If I would like to access the status property on the main thread do I need to take any precaution or there is nothing to take care of as I am just reading the property on the main thread?
Reading a property on a main thread that is set on a background thread
multithreading;objective c