http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51618
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-12-19 11:51:52 UTC --- Could you expand on what you mean by "no attached synchronization"? If a global future visible to all threads stores a deferred function then it still needs synchronization to ensure only one thread can invoke the deferred function and that other threads will wait for it to complete. std::async is not meant to be the fastest or most flexible solution, it's meant to be a simple way to exploit a limited amount of concurrency, without breaking the Kona compromise. Better solutions are suitable for TR2.
