win_gettimeofday.h File Reference

Go to the source code of this file.

Classes
struct	timeval

Typedefs
typedef struct timeval	timeval

Functions
int	gettimeofday (struct timeval *tp, struct timezone *tzp)

Typedef Documentation

timeval

typedef struct timeval timeval

Function Documentation

gettimeofday()

int gettimeofday ( struct timeval *  tp, struct timezone *  tzp  )

inline

Definition at line 23 of file win_gettimeofday.h.

References timeval::tv_sec, and timeval::tv_usec.

Referenced by libMesh::PerfLog::clear(), libMesh::PerfLog::get_elapsed_time(), libMesh::PerfLog::get_perf_info(), libMesh::PerfData::pause_for(), libMesh::PerfLog::PerfLog(), libMesh::PerfMon::print(), libMesh::PerfMon::reset(), libMesh::PerfData::restart(), libMesh::PerfData::start(), and libMesh::PerfData::stop_or_pause().

{
    // This magic number is the number of 100 nanosecond intervals since January 1, 1601 (UTC)
    // until 00:00:00 January 1, 1970
    static const uint64_t EPOCH = ((uint64_t) 116444736000000000ULL);

    SYSTEMTIME  system_time;
    FILETIME    file_time;
    uint64_t    time;

    GetSystemTime(&system_time);
    SystemTimeToFileTime(&system_time, &file_time);
    time =  ((uint64_t)file_time.dwLowDateTime );
    time += ((uint64_t)file_time.dwHighDateTime) << 32;

    tp->tv_sec  = (long) ((time - EPOCH) / 10000000L);
    tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
    return 0;
}