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http://www.openoffice.org/issues/show_bug.cgi?id=72248
User hdu changed the following:
What |Old value |New value
================================================================================
CC|'cl,ericb,fheckl,sparcmoz,|'cl,ericb,fheckl,pl,sparcm
|ssa,tino' |oz,ssa,thb,tino'
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------- Additional comments from [EMAIL PROTECTED] Fri Jun 1 15:38:56 +0000
2007 -------
Ok, after a reaalllyy long debugging session I think I understand what happened:
- SRC680_m211 uses the boost-1.30.2 headers
- the boost header file "macosx.hpp" includes "posix_features.hpp"
- unless TARGET_CARBON is defined, which we have for obvious reasons in the VCL
aqua build
- without "posix_features.hpp" boost doesn't know that the OS has pthread
support
- when boost doesn't know which threading library to use it undefines
BOOST_HAS_THREADS
- boost/detail/shared_count.hpp without BOOST_HAS_THREADS doesn't use pthread
mutexes
- so the class sp_counted_base does no longer contain a mutex member mtx_
=>
- this base class now has a different memory layout in VCL than other libraries
=>
- a different memory layout of classes with the same name does not seem to be
too much of a problem,
when the class is only used inline
- when inlining is disabled (e.g. for -O0 or also for -O -fno-default-inline)
then the problem rears its
ugly head very forcefully
So even in a build without debug=true the problem was there, only much smaller.
With objects of type
shared_counter not being mutex protected the problem would have shown only for
highly
multithreaded use cases.
Newer versions of boost's macos.hpp header file do not disable pthread mutexes
for shared_counter
(some related info can be found here:
http://lists.boost.org/boost-users/2004/10/8110.php).
We should either upgrade the boost library or patch our boost macos.hpp include
file to remove the
stupid TARGET_CARBON check.
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