Sync vs Async and Blocking vs Non-Blocking

Let's clarify these confusing concepts!

Block vs Non-Block

: How to handle targets that cannot be controlled

What is Block?

• The called function holds the control and returns it together with the result value when returning

Sync vs Async

: Synchronous vs Asynchronous (abstract)

What is Synchronous?

• Syn (together) + Chrono (time)

  • Are the times of the targets aligned?

    • Aligning the time

  • When the time of returning control and the time of delivering the result value are the same

    • Synchronous!

What is Asynchronous?

• Not aligning the time

Block & Non-Block vs Sync & Async

Block & Non-Block

• About control

• How do you handle targets that cannot be controlled?

Sync & Async

• About the time (timing) of returning control

• Are the times of the targets aligned?