matrix_df hotmail wrote: > Hello > >> Both lines above are essential. The first one makes sure your >> application's memory will remain physically present and not swapped away >> e.g. The second one turns the main thread of this program into a Xenomai >> thread, and this is required to block on an event out of the real-time >> domain like the arrival of a TDMA SYNC frame. >> >> But if you have a demo code that doesn't work while the above example >> does, please post it. > > > This mean, when I want to use WAITONCYCLE in xmit_msg(void *arg) of > frag-ip.c I need to add > > mlockall(MCL_CURRENT | MCL_FUTURE) in main() >
Yep (Xenomai will complain otherwise anyway). > and > > rt_task_shadow(&task, "waitonsync", 1, 0) in xmit_msg(void *arg) > That depends. This function enables Xenomai support for a Linux thread *after* it has been created (like main...). But when you use rt_task_create/start or rt_task_spawn, both creation and Xenomai-mapping are combined. See also the Xenomai API documentation for details or, if something remains unclear, ask on xenomai-help. Jan
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