On 01/01/2012 01:56 PM, Jan-Erik Lange wrote: > > > > >> Date: Sat, 31 Dec 2011 16:32:20 +0100 From: >> gilles.chanteperd...@xenomai.org To: jan0...@hotmail.de CC: >> xenomai-core@gna.org Subject: Re: [Xenomai-core] user and kernel >> space >> >> On 12/31/2011 12:18 PM, Jan-Erik Lange wrote: >>> >>> Hello, >>> >>> I have a question concerning user space and kernel space. I'm >>> dealing with the native API and I read, that this API provides >>> the same funtkions for both kernel and user space. >>> >>> When looking at the sourcecode of buffer.h for example, there I >>> find a section called public interface. When looking at the >>> function rt_buffer_create(); for example, how does the >>> Implementation von this function in userspace differs to the >>> implementation for this function kernel space? Or is it the same >>> implementation for user and kernel space. >> >> For most services such as buffer services, user functions emit >> system calls which implementation in kernel-space use the >> corresponding kernel service. >> >> There are some exceptions such as mutexes implementation where we >> try hard to avoid system calls and so provide both a user-space >> implementation and a kernel-space implementation. > > > Ok, but the names of the API function are the same for user and > kernel space. How is it realized to take the implementation A for > kernel space and the implementation B for userspace? Is this realzied > in the linking process?
Yes, kernel and user-space are separated execution space, there is no possible confusion. -- Gilles. _______________________________________________ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core