[openssl-dev] [openssl-team] Discussion: design issue: async and -lpthread

[Nico Williams]

On Mon, Dec 07, 2015 at 02:41:35PM +0100, Florian Weimer wrote:
> On 11/25/2015 06:48 PM, Kurt Roeckx wrote:
> > Please note that we use C, not C++.  But C11 has the same atomics
> > extentions as C++11.
> 
> C++11 support is much more widespread than C11 support.  You will have
> trouble finding reliable support for C11 atomics with the Microsoft
> toolchain.
>
> [...]
>
> It is a lot of working getting the atomics right on all supported platforms.

The MSFT toolchain has its own intrisics, as do GCC/clang.  A variety of
OSes have their own atomics libraries (e.g., Solaris/Illumos, FreeBSD,
and others).  Linux has several as well, but I am not sure that the
licensing on those will be compatible to link against (much less to
incorporate as source in OpenSSL).  Some of the BSD or CDDL licensed
libraries might be possible to incorporate as source into OpenSSL.

It's a solvable problem, but yes, a lot of work :(  Still, it seems
worth doing.

Nico
--