Re: Request for swapcontext and getcontext to be ported to our libc

[Petr Janda <elekktretterr@xxxxxxxxxxxxxx>]

So is the current context code going into cvs HEAD or whats happening?

Petr

Simon 'corecode' Schubert wrote:
> Matthew Dillon wrote:
> >     The answer is: yes, it is possible.  There is no reason why the
> >     signal mask (and signal pending bitmap) couldn't be stored in user
> >     memory, allowing the userland threading system to swap out the mask
> >     without entering the kernel.  
>
> I absolutely agree.  I am thinking of a special page mapped in kernel 
> and userspace memory, where things like signal mask and pending (per 
> thread) are located, and maybe also a timecounter, pid, etc.
>
> >     So I think there is a very good argument for making the current 
> > release
> >     implementation do these calls in libc and not as system calls, and
> >     initially have libc just get the signal mask with a system call, 
> > then
> >     at some later date add the feature sthat allow the userland context
> >     routines to run fully without having to make any system calls at 
> > all.
>
> If Matt Emmerton finds the time to implement it, I am all for it.  
> Having these functions as syscalls seems wrong in my eyes.
>
> cheers
>  simon