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