Re: [Boost-Users] Macintosh Carbon Thread Error with Boost 1.30.0

Bobby Thomale wrote:

Hey guys,

I just tried to get the new Boost 1.30.0 release to work on MacOS, using TARGET_CARBON (with threads turned on).

I have a problem to report: there's a new "lightweight mutex" being used by the smart pointer library.

There does not seem to be a lightweight mutex implementation for the "Carbon MP tasks" thread implementation.

So - when I compile my code under Boost 1.30 I end up at:

# error Unrecognized threading platform

in lightweight_mutex.hpp when it tries to compile any of the smart pointer stuff.

You are right, there is no lightweight mutex for Carbon since nobody submitted one. :-) In Boost 1.29 and earlier, the #error was commented out, and shared_ptr silently fell back to the non-thread safe implementation. If you don't need a thread safe shared_ptr, you can replace the #error with # include If you need the thread safety, and you are familiar with Carbon MP tasks, you can write a lightweight mutex implementation for this platform and submit it for inclusion. Or you can simply typedef boost::mutex as boost::detail::lightweight_mutex, if you don't mind linking with Boost.Threads. HTH