[Xenomai-help] Help with heap managment

[Xenomai-help] Help with heap managment

[Randy Smith]

Hi everyone,

Using the native skin, I have two heaps that I create in a kernel module 
using rt_heap_create.  They are of type H_SHARED.  I can see these in 
the /proc file system.  When I cat these files I get...

bash-2.05b# cat 
/proc/xenomai/registry/native/heaps/header                                                                                      

type=shared:size=8192:used=8192
bash-2.05b# cat /proc/xenomai/registry/native/heaps/uframe
type=shared:size=538624:used=536576

so I know they exist.

Now, in my user space code, I am trying to use these shared memory 
segments by first calling rt_heap_bind to get the uniform descriptor to 
use in a subsequent rt_heap_alloc call, but the bind fails with an 
errorcode of -2 which doesn't map to the return codes listed in the 
documentation.

Any clues?

Am I using the correct calling sequence from user space?

-Randy Smith
Software Engineer
ImageMap, Inc.

Re: [Xenomai-help] Help with heap managment

[Randy Smith]

Randy learns to make device nodes for rtheap and rtpXX.  Had to use 
strace -f to see that it was failing to open /dev/rtheap.  After these 
are in place problem goes away.

Randy Smith wrote:
> Hi everyone,
>
> Using the native skin, I have two heaps that I create in a kernel 
> module using rt_heap_create.  They are of type H_SHARED.  I can see 
> these in the /proc file system.  When I cat these files I get...
>
> bash-2.05b# cat 
> /proc/xenomai/registry/native/heaps/header                                                                                      
>
> type=shared:size=8192:used=8192
> bash-2.05b# cat /proc/xenomai/registry/native/heaps/uframe
> type=shared:size=538624:used=536576
>
> so I know they exist.
>
> Now, in my user space code, I am trying to use these shared memory 
> segments by first calling rt_heap_bind to get the uniform descriptor 
> to use in a subsequent rt_heap_alloc call, but the bind fails with an 
> errorcode of -2 which doesn't map to the return codes listed in the 
> documentation.
>
> Any clues?
>
> Am I using the correct calling sequence from user space?
>
> -Randy Smith
> Software Engineer
> ImageMap, Inc.
>
>
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