Solution to error "Cannot Resume a Coroutine which is in I/O mode Or non-existent"

[fakharksa]

With Reference to this Closed issue Cannot Resume a Coroutine which is in I/O mode Or non-existent

See my Comment as a Solution

It will be good if we have a more performant built-in function for that; A function which returns the (boolean) fact "whether the coroutine is in "yieldable" mode or not" (which replaces the less-performing condition below):

if (Swoole\Coroutine::getBackTrace($cid1)[0]['function'] == 'yield') {
...
}

Or may be you can update co::resume() such that it resumes the yielded coroutine only when it is yieldable (in "yieldable" moden: when it is released from I/O and / or co::sleep() )

Thanks in advance.

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Also, with due regards, i would like to present my disagreement with this response

I think co::yield() / co::resume() is a useful set of functions, and should not be deprecated / removed from the Swoole's API, in future, as it may be utilised effectively in developing different Design Patterns / Libraries / Frameworks around Swoole, like i showed "Toggling / Switching" between Co-routines, forever (or for specific number of iterations)".