cds/os/sunos/topology.h

   1 //$$CDS-header$$
   2
   3 #ifndef CDSLIB_OS_SUNOS_TOPOLOGY_H
   4 #define CDSLIB_OS_SUNOS_TOPOLOGY_H
   5
   6 #ifndef CDSLIB_OS_TOPOLOGY_H
   7 #   error "<cds/os/topology.h> must be included instead"
   8 #endif
   9
  10 #include <sys/processor.h>
  11 #include <unistd.h>
  12
  13 namespace cds { namespace OS {
  14
  15     /// Sun Solaris-specific wrappers
  16     CDS_CXX11_INLINE_NAMESPACE namespace Sun {
  17
  18         /// System topology
  19         /**
  20             The implementation assumes that the processor IDs are in numerical order
  21             from 0 to N - 1, where N - count of processor in the system
  22         */
  23         struct topology {
  24             /// Logical processor count for the system
  25             static unsigned int processor_count()
  26             {
  27                 // Maybe, _SC_NPROCESSORS_ONLN? But _SC_NPROCESSORS_ONLN may change dynamically...
  28                 long nCount = ::sysconf(_SC_NPROCESSORS_CONF);
  29                 if ( nCount == -1 )
  30                     return  1;
  31                 return (unsigned int) nCount;
  32             }
  33
  34             /// Get current processor number
  35             static unsigned int current_processor()
  36             {
  37                 return  ::getcpuid();
  38             }
  39
  40             /// Synonym for \ref current_processor
  41             static unsigned int native_current_processor()
  42             {
  43                 return current_processor();
  44             }
  45
  46             //@cond
  47             static void init()
  48             {}
  49             static void fini()
  50             {}
  51             //@endcond
  52         };
  53     }   // namespace Sun
  54
  55 #ifndef CDS_CXX11_INLINE_NAMESPACE_SUPPORT
  56     using Sun::topology;
  57 #endif
  58 }}  // namespace cds::OS
  59
  60 #endif  // #ifndef CDSLIB_OS_SUNOS_TOPOLOGY_H