Re: RFC: make _fiber_start() return a handle on the fiber


Jukka Rissanen
 

Hi Ben,

On Fri, 2016-02-19 at 10:36 -0500, Benjamin Walsh wrote:
When we start a fiber via the _fiber_start() API family, we don't
get back a handle on the created fiber. The fiber identifier is
actually the start of the fiber's stack. This hasn't been a
problem
until now since no API requires a handle on the fiber, except
one,
fiber_delayed_start_cancel(): that API is part of a pair, where
the
other API, fiber_delayed_start() starts the fiber and returns a
handle.

However, Jukka asked me an API could be created that cancels a
fiber_sleep() call, something like fiber_wakeup(). The
implementation of such an API is very simple, but it requires a
handle on the fiber we want to wake up. This in turn requires the
signature of the _fiber_start() family to return a handle to the
fiber that gets started.

The signature of _fiber_start() et al. would then change from a
void
return type to a void * return type.

Objections, comments, etc ?
No comments -> no objects -> perhaps we can continue with this
route
then?
Looks like it. You want to do the implementation yourself Jukka ?
I am a bit busy right now so I am fine if you do it.


Cheers,
Jukka

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