[Boost-bugs] [Boost C++ Libraries] #7403: lockfree support in MSVC 2012

Subject: [Boost-bugs] [Boost C++ Libraries] #7403: lockfree support in MSVC 2012
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-09-21 18:28:21

#7403: lockfree support in MSVC 2012
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 Reporter:  Zouzou <internet@…>           |       Owner:  timblechmann
     Type:  Bugs                          |      Status:  new         
Milestone:  To Be Determined              |   Component:  lockfree    
  Version:  Boost 1.52.0                  |    Severity:  Problem     
 Keywords:                                |  
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 Hi,

 MSVC 2012 has atomics; it therefore allows boost.lockfree to be used with
 it.

 Using boost.atomic on MSVC is not an option because it falls back to
 interlocked functions (not lock-free).

 Here is a simple patch for lockfree's atomic.hpp showing the necessary
 changes:
 - don't define BOOST_LOCKFREE_NO_HDR_ATOMIC in order to use <atomic>, not
 <boost/atomic.hpp>.
 - remove the (__cplusplus < 201103L) check because __cplusplus is defined
 to 199711 on MSVC 2012...

 There is an additional change in freelist.hpp: include <boost/cstdint.hpp>
 (it was being included by <boost/atomic.hpp>).

 With these changes lock-free lists seem to be working fine! :) (I verified
 that is_lock_free() does return true.)

 Feel free to adjust the patch of course; this is just to show what is
 required to make boost.lockfree truly lock-free on MSVC 2012. I'm
 available for any further questions.

 Thanks for adding atomic & lockfree. :)
 Zouzou

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7403>
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