在面试iOS开发者角色时,我被问到这个问题.
// Please design a read-write task queue where you can tag the reader task with label,
// where the the task with the same label should be executed sequentially, and the
// tasks with different labels could be executed concurrently. However, the writer
// would get the exclusive access where no concurrent task would happen at the
// same time with the writer task
// For example:
protocol ConcurrentQueueWithSerialization {
// Submits a labeled task.
// All tasks with …