[Bug libstdc++/49204] [C++0x] remaining issues in <future>

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49204

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-05-31 13:40:03 UTC ---
We should also make std::async check the system load when deciding whether to
run asynchronously or deferred.  We should be able to reuse GNU Make's code for
deciding whether to run a new job or not, see load_too_high() in job.c