Fix waiting on coroutines (#5463)
Public coroutine API returns a safe reference to specific running coroutine. Fixes bug where multiple coroutines executing same procedure would identify as same coroutine. Greatly optimizes `alive()` (and as a result of that `wait()`) calls. Coroutine struct is allocated together with stack as memory unmanaged by GC.
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3 changed files with 56 additions and 27 deletions
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tests/coroutines/twait.nim.cfg
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tests/coroutines/twait.nim.cfg
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-d:nimCoroutines
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