On Tue, 21 Sep 1999, Dresner, Norman A. wrote:
> I'm writing a program which will use Shared Memory (above the
> append="mem=XXm" level) for (two-way) communication of large real-time
> messages between a module/device-driver and a user-space program.
>
> Because I like to keep things neat and readable (I do know I won't live
> forever), a "formal" malloc-like mechanism for Shared Memory would make the
> program more self-documenting, certainly more so than with just a bunch of
> #defines and the like.
You can use the following code (kernel space):
#define SIZE=1024*1024*4;
char * buffer;
if(shm_allocate("example_name",SIZE, &buffer) != SIZE)
return -ENOMEM;
then you can use:
shm_deallocate(buffer);
For use in user space see: tester.c in
http://crds.chemie.unibas.ch/PCI-MIO-E/mbuff-0.6pre5-rtl.tar.gz
To get a separate module (not in rtl_nfifo.o) change options at the
beginning of Makefile. Or use mbuff-0.6pre4 and remove rtl_nfifo.o from the
Makefile.
--
Tomek
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