[Boost-bugs] [Boost C++ Libraries] #5595: Windows: Cannot write to files which have been mapped to memory in other threads/processes

Subject: [Boost-bugs] [Boost C++ Libraries] #5595: Windows: Cannot write to files which have been mapped to memory in other threads/processes
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-06-06 10:01:54

#5595: Windows: Cannot write to files which have been mapped to memory in other
threads/processes
---------------------------------------------------+------------------------
 Reporter:  Armin Pies <armin.pies@…>              |       Owner:  turkanis 
     Type:  Bugs                                   |      Status:  new      
Milestone:  To Be Determined                       |   Component:  iostreams
  Version:  Boost 1.43.0                           |    Severity:  Problem  
 Keywords:  memory mapping, windows                |  
---------------------------------------------------+------------------------
 Windows:
 If I try to open a file for writing which has been memory mapped by using
 boost::iostreams::mapped_file_source, I get an "Permission denied".

 Under Linux (e.g. Ubuntu, openSUSE) there is no problem.

 The cause of this behavior seems to be, that mapped_file_impl::open_file
 uses CreateFile WIN32 API with the parameter FILE_SHARE_READ instead of
 FILE_SHARE_WRITE.

 Is this supposed to be like this?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5595>
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