spin-lock

基本解释

It acquires the spin lock and begins its access.
他守护旋转锁并且开始其访问。
To prevent chaos, we associate a spin lock with this “resource.
为了防止混乱，我们用这个资源联合一个旋转锁。
We decide that we will access the resource only while owning the spin lock.
我决定：我们将要访问的只有具有旋转锁的资源。
I want to be very clear about how a spin lock and a shared resource come to be associated.
我想要很清楚地（说明）：一个旋转锁和一个共享资源是如何被关连在一起的。
As I'll discuss later in this chapter, queue access occurs under protection of a spin lock, and that carries with it execution at DISPATCH_LEVEL.
就像在这章后面我将要讨论的一样，队列访问发生在一个旋转锁的保护之下，并且它在DISPATCH_LEVEL上来执行。