Purpose of introducing jobs_left

[CHE Yulin]

Hi nbsdx,
I am confused about the introduction of jobs_left.
What is the purpose of introducing atomic_int type jobs_left(in line 27)?
I think, we could simply add the queue_mutex's lock in function WaitAll() (in line 148), rather than using the atomic_int variable jobs_left?
So, what is your consideration here?

Best,
CHE Yulin

[Neil]

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