Re: [Boost-bugs] [Boost C++ Libraries] #10788: GetLogicalProcessor isn't available for Windows platform less or equals to 0x0502

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10788: GetLogicalProcessor isn't available for Windows platform less or equals to 0x0502
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-06-28 09:07:10

#10788: GetLogicalProcessor isn't available for Windows platform less or equals to
0x0502
---------------------------------+----------------------
  Reporter:  steve.tousignant@…  |      Owner:  viboes
      Type:  Bugs                |     Status:  assigned
 Milestone:  To Be Determined    |  Component:  thread
   Version:  Boost 1.57.0        |   Severity:  Problem
Resolution:                      |   Keywords:
---------------------------------+----------------------
Changes (by viboes):

 * owner:  anthonyw => viboes
 * status:  new => assigned

Comment:

 The current code is


 {{{
     unsigned thread::physical_concurrency() BOOST_NOEXCEPT
     {
 #if BOOST_PLAT_WINDOWS_RUNTIME || (defined(__MINGW32__) &&
 !defined(__MINGW64_VERSION_MAJOR))
         return hardware_concurrency();
 #else
         unsigned cores = 0;
         DWORD size = 0;

         GetLogicalProcessorInformation(NULL, &size);
         if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
             return 0;

         std::vector<SYSTEM_LOGICAL_PROCESSOR_INFORMATION> buffer(size);
         if (GetLogicalProcessorInformation(&buffer.front(), &size) ==
 FALSE)
             return 0;

         const size_t Elements = size /
 sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);

         for (size_t i = 0; i < Elements; ++i) {
             if (buffer[i].Relationship == RelationProcessorCore)
                 ++cores;
         }
         return cores;
 #endif
     }
 }}}

 Does it works for you?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10788#comment:2>
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