Re: [Xenomai-help] Question about rtdm_mmap_to_user()

[Jan Kiszka <jan.kiszka@domain.hid>]

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Perrine Martignoni wrote:
>> Why don't you try rt_heap_* functions? Quick example:
>>
>> Kernel space:
>>
>> RT_HEAP heap_desc;
>> void *shared;
>>
>> rt_heap_create (&heap_desc, "MySHM", 2048, H_SHARED);
>> rt_heap_alloc (&heap_desc, 0, TM_NONBLOCK, &shared);
>> [.. cleanup ..]
>> rt_heap_delete (&heap_desc);
>> User space:
>>
>> RT_HEAP heap_desc;
>> void *shared;
>>
>> rt_heap_bind (&heap_desc, "MySHM", TM_NONBLOCK);
>> rt_heap_alloc (&heap_desc, 0, TM_NONBLOCK, &shared);
>> [..cleanup..]
>> rt_heap_unbind (&heap_desc);
> 
> I tried exactly what you wrote. And it doesn't work. I have error -11. It
> doesn't find the Heap I created in kernel space.
> I don't understand why. I put exactly the same name.

Mixing up RTDM and native API usage, though technically feasible, isn't 
a good idea anyway. Better have a look at Hannes' example, and if that 
one or your own version still doesn't work, post more details (Xenomai 
version, target architecture, test code, etc.).

Jan


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