[Boost-bugs] [Boost C++ Libraries] #10353: Interprocess: rbtree_best_fit ABI change from 1.53 to 1.55

Subject: [Boost-bugs] [Boost C++ Libraries] #10353: Interprocess: rbtree_best_fit ABI change from 1.53 to 1.55
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-08-13 20:40:23

#10353: Interprocess: rbtree_best_fit ABI change from 1.53 to 1.55
------------------------------+------------------------------
 Reporter:  Terence.Darwen@…  |       Type:  Bugs
   Status:  new               |  Milestone:  To Be Determined
Component:  None              |    Version:  Boost 1.55.0
 Severity:  Problem           |   Keywords:
------------------------------+------------------------------
 I have an issue that seems to be identical to the issue discussed in this
 thread on the Boost List: http://lists.boost.org/boost-

 users/2014/01/81159.php

 Basically, it seems the size of the Imultiset member in header_t of
 rbtree_best_fit.hpp has changed between Boost 1.53 and Boost 1.55.  As
 mentioned in the thread from the Boost List:

 >>
 boost::interprocess::rbtree_best_fit<boost::interprocess::null_mutex_family,boost::interprocess::offset_ptr<void,__int64,unsigned
 __int64,0>,0>
 >>
 >> has size = 56
 >> member m_header.m_imultiset has size 32
 >>
 >> In code compiled with boost 1.55:
 >>
 >> the same type has size = 72
 >> member m_header.m_imultiset has size 48
 >
 >
 >Wow, that's too big. I think this is related with MSVC Empty Base
 >Implementation behaviour. I refactored those classes to avoid redundant
 >simple forwarding functions using inheritance and that broke this for
 >MSVC compilers. I should add some checks for 32 and 64 bit compilers to
 >guarantee the minimum size (16 bytes in 32 bit and 32 bytes in 64 bit).

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10353>
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