Stefan Beller <sbel...@google.com> writes:

> * renamed return_value_fn to task_finished_fn

It made interdiff noisier but I think it gives us a good end result.

> * the main loop of the parallel processing was first adapted to Junios 
> suggestion,
>   but Jonathan pointed out more improvements.  We can get rid of 
> `no_more_task`
>   completely as `if (!pp->nr_processes)` as the exit condition is sufficient.
>   (pp->nr_processes is modified only when starting or reaping a child, so we 
> will
>   capture the whole output of each subprocess even in case of a quick 
> shutdown)

Interesting.  The original motivation for "no-more-task" check was
that even when we are no longer running anything (i.e. everybody
finished) we may get a new task from next_task(), and the condition
to "break" out of the loop could be placed anywhere in that loop
(e.g. after we wait and cull the finished tasks, or even in the
outermost while(1) condition).

But you can take advantage of the specific placement of the check;
it is after the part that spawns new tasks and before the part that
culls the existing tasks, so not having any running task at that
point is sufficient condition.

Will replace what was queued.

Thanks.
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