Increase IPC-Stream size

Adam Lackorzynski adam at os.inf.tu-dresden.de
Wed Feb 11 00:10:31 CET 2015


On Wed Feb 04, 2015 at 13:28:11 +0100, ba_f wrote:
> Am 2015-01-31 00:17, schrieb Adam Lackorzynski:
> >>But tell me some about shared memory, please.
> >>
> >>1.) is there an example, anywhere?
> >
> >There's at least the shmc example for the lib. But in a more simple form
> >it is actually not needed. Have a dataspace, make it available to two
> >tasks, and it's shared memory.
> 
> Ok, i prefer using the shmc.h.
> 
> But, the example (libs/shmc) runs two threads.
> I would like to use shared_mem between two tasks.
> 
> Is it possible to use shmc.h to share memory between tasks?

Yes.
 
> I tried to partition 'thread_producer()' and 'thread_consume()' to two
> Tasks.
> But as expected, task_client doesn't know the shared_mem which task_server
> created.

The key is the sharing as you already noticed. The sharing goes via the
namespace given to l4shmc_create. Give both programs the same namespace
(created in ned's script) and they should be able to share.



Adam
-- 
Adam                 adam at os.inf.tu-dresden.de
  Lackorzynski         http://os.inf.tu-dresden.de/~adam/



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