[PATCH 4/6] spintrcritical20: Fix incorrect assumption

[Sebastian Huber]

On 2014-07-09 16:37, Joel Sherrill wrote:
> I think this patch is wrong. Subsequent changes to the thread queue after I
> posted this resulted in the test breaking again.
>
> What is the test trying to do? I think sometimes through the loop, the
> condition the test expects is not occurring and it fails.
>

 From the doc file we have:

   - Ensure that _Thread_queue_Process_timeout() works in case it is
     interrupted and _Thread_queue_Dequeue() is called.

It simulates a nested interrupt case.  Since we can use only the clock tick to 
work with interrupts I had to do the following:

1. Create a high priority task which creates the base state (semaphore locked).

2. Use a low priority task to simulate the timeout process.

3. Use a timer to simulate the high priority nested interrupt.

I think this is the only test which uses this approach so far.  This partly 
explains why bugs like this prevailed for such a long time:

https://www.rtems.org/bugzilla/show_bug.cgi?id=2140

Do you not hit the test case or do you hit an assertion failure?

-- 
Sebastian Huber, embedded brains GmbH

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