Re: How to determine if task is busy or not?

["Tomek Wałkuski" <tomek.walkuski@gmail.com>]

On 8 Sie, 16:59, Maciej Sobczak <see.my.homep...@gmail.com> wrote:

> Depends. If it is the asking entity that is also providing the job,
> then the problem above cannot happen. In other words, if the "manager"
> asks the task whether it is busy or idle and the answer is "idle",
> then that answer it true until the same manager provides new work
> unit, because there is no other way for the task to switch from "idle"
> to "busy". Which means that the manager can always safely handle a new
> work unit to the "idle" task, no race is possible.
>
Only manager is providing work to the tasks. So, as you said, no race
is possible.

> To Tomek - the simplest way to deploy your original idea is to use a
> flag (Busy/Idle - an enumeration type is perfect here), which is
> shared and used by both the worker task and its manager. Protected
> object is a proper solution here and you might even use the same
> protected object for managing both the flag and the work unit itself.
>
That was my first thought :)