cds/os/sunos/timer.h

   1 //$$CDS-header$$
   2
   3 #ifndef __CDS_OS_SUNOS_TIMER_H
   4 #define __CDS_OS_SUNOS_TIMER_H
   5
   6 #ifndef __CDS_OS_TIMER_H
   7 #   error "<cds/os/timer.h> must be included"
   8 #endif
   9
  10 #include <sys/time.h>
  11
  12 //@cond none
  13 namespace cds { namespace OS {
  14     CDS_CXX11_INLINE_NAMESPACE namespace Sun {
  15
  16         // High resolution timer
  17         class Timer {
  18             hrtime_t    m_tmStart;
  19         public:
  20             typedef hrtime_t    native_timer_type;
  21             typedef long long    native_duration_type;
  22
  23             Timer() : m_tmStart( current() ) {}
  24
  25             static native_timer_type    current()            { return gethrtime();    }
  26             static void current( native_timer_type& tmr )    { tmr = gethrtime();    }
  27
  28             double reset()
  29             {
  30                 native_timer_type tt = current();
  31                 double ret = (tt - m_tmStart) / 1.0E9;  //gethrtime() freq = nanoseconds
  32                 m_tmStart = tt;
  33                 return ret;
  34             }
  35
  36             double duration( native_duration_type dur )
  37             {
  38                 return double( dur ) / 1.0E9;
  39             }
  40
  41             double duration()
  42             {
  43                 return duration( native_duration() );
  44             }
  45
  46             native_duration_type    native_duration()
  47             {
  48                 return native_duration( m_tmStart, current() );
  49             }
  50
  51             static native_duration_type    native_duration( native_timer_type nStart, native_timer_type nEnd )
  52             {
  53                 return native_duration_type( nEnd - nStart );
  54             }
  55
  56             static unsigned long long random_seed()
  57             {
  58                 return (unsigned long long) current();
  59             }
  60         };
  61
  62     }   // namespace Sun
  63
  64 #ifndef CDS_CXX11_INLINE_NAMESPACE_SUPPORT
  65     typedef Sun::Timer    Timer;
  66 #endif
  67
  68 }}  // namespace cds::OS
  69 //@endcond
  70
  71 #endif // #ifndef __CDS_OS_SUNOS_TIMER_H