Daan De Meyer
4754cd2db6
sd_fiber_await() returned the target future's result on completion and an error on interruption, so a negative value could mean either that the target future resolved with an error or that the wait never finished. Most callers had to check the target future's state afterwards to tell the two apart. Even worse, a target resolving with -ECANCELED was indistinguishable from a cancelled wait. Let's return 0 once the target future has resolved and a negative error only when the wait itself did not complete. The target future's outcome stays available through sd_future_result(), which callers have to additionally inspect now.
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