Re: [Boost-bugs] [Boost C++ Libraries] #9019: Bug: mapped_region shouldn't create a new file mapping but reuse the one provided in file_mapping

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9019: Bug: mapped_region shouldn't create a new file mapping but reuse the one provided in file_mapping
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-08-20 17:36:29

#9019: Bug: mapped_region shouldn't create a new file mapping but reuse the one
provided in file_mapping
-------------------------+-------------------------------------------------
  Reporter:              |      Owner:  igaztanaga
  michal.fronczyk@…      |     Status:  new
      Type:  Bugs        |  Component:  interprocess
 Milestone:  To Be       |   Severity:  Optimization
  Determined             |   Keywords:  interprocess mapped_region
   Version:  Boost       |  file_mapping
  1.54.0                 |
Resolution:              |
-------------------------+-------------------------------------------------

Comment (by igaztanaga):

 Just as additional information, I've found:

 http://www.labri.fr/perso/betrema/winnt/manamemo.html


 "To use a memory-mapped file, you start by creating a memory-mapped file
 object. The act of creating an MMF object has very little impact on system
 resources. It does not affect your process's address space, and no virtual
 memory is allocated for the object (other than for the internal resources
 that are necessary in representing the object)."

 Maybe it has no big impact in system resources but it could be much slower
 than reusing the object.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9019#comment:2>
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