cds/os/win/topology.h

   1 //$$CDS-header$$
   2
   3 #ifndef CDSLIB_OS_WIN_TOPOLOGY_H
   4 #define CDSLIB_OS_WIN_TOPOLOGY_H
   5
   6 #ifndef CDSLIB_OS_TOPOLOGY_H
   7 #   error "<cds/os/topology.h> must be included instead"
   8 #endif
   9
  10 #include <cds/details/defs.h>
  11 #ifndef NOMINMAX
  12 #   define NOMINMAX
  13 #endif
  14 #include <windows.h>
  15
  16 namespace cds { namespace OS {
  17
  18     /// Windows-specific wrappers
  19     CDS_CXX11_INLINE_NAMESPACE namespace Win32 {
  20
  21         /// System topology
  22         /**
  23             The implementation assumes that:
  24                 \li the system has no more than 64 logical processors;
  25                 \li processor IDs are in numerical order from 0 to N - 1, where N - count of processor in the system
  26         */
  27         struct CDS_EXPORT_API topology
  28         {
  29 #   if _WIN32_WINNT >= 0x0601       // >= Windows 7
  30             static unsigned int    processor_count()
  31             {
  32                 return ::GetActiveProcessorCount( ALL_PROCESSOR_GROUPS );
  33             }
  34 #   else    // < Windows 7
  35             /// Logical processor count for the system
  36             static unsigned int processor_count();
  37 #   endif
  38
  39 #   if _WIN32_WINNT >= 0x0600   // >= Windows Vista
  40             static unsigned int current_processor()
  41             {
  42                 return ::GetCurrentProcessorNumber();
  43             }
  44 #   else    // < Windows Vista
  45             /// Get current processor number
  46             static unsigned int current_processor();
  47 #   endif
  48
  49             /// Synonym for \ref current_processor
  50             static unsigned int native_current_processor()
  51             {
  52                 return current_processor();
  53             }
  54
  55             //@cond
  56             static void init()
  57             {}
  58             static void fini()
  59             {}
  60             //@endcond
  61         };
  62
  63     }   // namespace Win32
  64
  65 #ifndef CDS_CXX11_INLINE_NAMESPACE_SUPPORT
  66     using Win32::topology;
  67 #endif
  68 }}  // namespace cds::OS
  69
  70
  71
  72 #endif  // #ifndef CDSLIB_OS_WIN_TOPOLOGY_H