Re: refine of the GSOC project

[Martin Husemann <martin%duskware.de@localhost>]

On Thu, May 12, 2016 at 09:07:58PM +0200, Kamil Rytarowski wrote:
> On 12.05.2016 07:37, Charles Cui wrote:
> >    PTHREAD_STACK_MIN  (freebsd)
> 
> I was told that this one is missing on purpose as there is no good
> reason to limit it from this side and a sane minimum is PAGE_SIZE.
> 
> Perhaps this is the way to go, to define it as it?

Posix says:

{PTHREAD_STACK_MIN}
    Minimum size in bytes of thread stack storage.
    Minimum Acceptable Value: 0


but in the prefix:

Runtime Invariant Values (Possibly Indeterminate)

A definition of one of the symbolic constants in the following list
shall be omitted from <limits.h> on specific implementations where the
corresponding value is equal to or greater than the stated minimum, but
is unspecified.

This indetermination might depend on the amount of available memory
space on a specific instance of a specific implementation. The actual
value supported by a specific instance shall be provided by the
sysconf() function.


So we should not define it but provide the proper sysconf() as an alias
for page size (or two pages)?

Martin