Differences between C ++ synchronous/asynchronous and blocking/non-blocking

C ++

------- What is synchronization, what is asynchronous, and what is blocking? Non-blocking?

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-------- Question

Here is an example of my understanding:

Suppose I am the boss, you are an employee, and I have something on hand. I will go home to get something after this.

Synchronization: I told you to do things. At the same time, I waited for the results until you finished.
Blocking: At the same time, during the waiting period, if I go to sleep (the thread is suspended), nothing can be done, that is, blocking.
Non-blocking: On the contrary, if I continue to do something else, it is not blocked.

Asynchronous: I told you to do things. I went home directly. After you finished, I was notified.
Blocking: No key at home. Please wait for your wife to return.
Non-blocking: Get something directly with a key.

These are my personal opinions.