How to handle removing a semaphore while it's being waited on by a different task?

[richard-damon]

@MWP

t’s a graphics buffer for an item on a display.
taskB (renderer) is rendering the item.
taskA (user-interaction/control) is removing it because it no longer needs to exist.

Just because the user-interface decided it didn’t need to exist, doesn’t mean it can be removed immediately. If it started a “background process” on the item, it needs to wait for the process to finish, or request the abort and wait for confirmation before destroying it.