Cedric Herreman wrote:
*/Gilles Chanteperdrix <[EMAIL PROTECTED]>/* wrote:
Cedric Herreman wrote:
> Hello,
>
> I have created a memory heap in the init_module routine of a
kernel module :
>
rt_heap_create(&heap_data,"RT_LOG_HEAP",sizeof(ttv_log_data),H_FIFO|H_SHARED);
> and
> rt_heap_alloc(&heap_data,0,TM_NONBLOCK,&loc_ptr);
> Both calls return succesful.
>
> When i try to bind to this memory in an user space application :
> rt_heap_bind(&rt_heap,"RT_LOG_HEAP",TM_NONBLOCK);
> the call returns with error -2, this error does not seem to be
documented (i test on all the constants defined in the html API
docs, xenomai v2.0).
>
> Can anyone give me a hint on what's wrong here ?
-2 is -ENOENT, no such file or directory.
You are probably missing the /dev/rtheap file. In order to create it,
run "make devices" with root privileges.
Gilles Chanteperdrix.
Yes, i was. I added the file on the target system (doesn't have the src
tree, so i can't "run make devices") like this :
mknod /dev/rtheap b 1 0
mknod /dev/rtheap c 10 254
Now, it is giving me the error : -EPERM. The doc says the call is made
from a context that cannot sleep (interrupt, non-realtime, scheduler
locked). Is it not possible to link to shared mem from a non-realtime
userspace application in this way ?
Cedric.
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