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