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RE: Reentrancy of the ecos drivers
- From: "harbonne marc" <marc dot harbonne at silicomp dot fr>
- To: <ecos-discuss at ecos dot sourceware dot org>
- Date: Tue, 18 Jul 2006 13:47:54 +0200
- Subject: [ECOS] RE: Reentrancy of the ecos drivers
Hi all,
My question is quite general, I cannot see in any ecos drivers provided with
the last version of ecos, a way to protect the shared resources.
As example, if you look at any display driver, we cannot see a semaphore
that will protect from a second task to access to the resource by
pre-empting the one which has the resource.
The only call I can see is a cyg_scheduler_lock and unlock to get/release
the resource.
But in many drivers such mechanism does not exist.
Can you tell me why?
Regards
Marc
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