[boost] Re: lightweight mutex for MacOS

From: Lars Gullik Bjønnes (larsbj_at_[hidden])
Date: 2004-01-28 04:44:24

Alexander Terekhov <terekhov_at_[hidden]> writes:

| Howard Hinnant wrote:
>> 
>> On Jan 27, 2004, at 10:38 AM, Alexander Terekhov wrote:
>> 
>> > Martin Taylor wrote:
>> >>
>> >> Hi
>> >>
>> >> I would like to put forward an implementation of a lightweight mutex
>> >> for MacOS.
>> >> I have tested it with shared_ptr_mt_test.cpp without problem.
>> >
>> > You don't have proper memory barriers for MP-safety. Abusing the
>> > scheduler is also not good.
>> 
>> Do you have any specific suggestions which would make this design at
>> least as good as that in lwm_gcc.hpp?
>
| http://www.boost.org/boost/detail/lwm_gcc.hpp is also broken.

Because of the sched_yield or something else?

Perhaps the lwm_gcc should just be removed?
(and lwm_linux)

In the lwm_linux case futexes could be used if new enough glibc and
kernel. (OTOH in that case it is likely that pthread's mutex is
implement with futex)

-- 
	Lgb