clock.hh

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// -*- tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=8 sw=2 sts=2:
 
#ifndef DUNE_PDELAB_COMMON_CLOCK_HH
#define DUNE_PDELAB_COMMON_CLOCK_HH
 
#include <ostream>
 
#include <sys/types.h>
 
#include <dune/common/exceptions.hh>
 
namespace Dune {
  namespace PDELab {
 
    struct TimeSpec {
      time_t tv_sec;
 
      long tv_nsec;
 
      inline TimeSpec &operator+=(const TimeSpec &o) {
        tv_sec += o.tv_sec;
        tv_nsec += o.tv_nsec;
        if(tv_nsec >= 1000000000L) {
          ++tv_sec;
          tv_nsec -= 1000000000L;
        }
        return *this;
      }
      inline TimeSpec operator+(const TimeSpec &o) const {
        TimeSpec tmp(*this);
        tmp += o;
        return tmp;
      }
      inline TimeSpec &operator-=(const TimeSpec &o) {
        tv_sec -= o.tv_sec;
        tv_nsec -= o.tv_nsec;
        if(tv_nsec < 0L) {
          --tv_sec;
          tv_nsec += 1000000000L;
        }
        return *this;
      }
      inline TimeSpec operator-(const TimeSpec &o) const {
        TimeSpec tmp(*this);
        tmp -= o;
        return tmp;
      }
 
    };
 
    std::ostream &operator<<(std::ostream &s, const TimeSpec &t);
 
    struct ClockError : Exception {};
 
    TimeSpec getWallTime();
    TimeSpec getWallTimeResolution();
    const std::string &getWallTimeImp();
    TimeSpec getProcessTime();
    TimeSpec getProcessTimeResolution();
    const std::string &getProcessTimeImp();
 
  } // namespace PDELab
} //namespace Dune
 
#endif // DUNE_PDELAB_COMMON_CLOCK_HH