cds/os/win/topology.h

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