fine_clock.h

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// fine_clock.h

#ifndef DB_STATS_FINE_CLOCK_HEADER
#define DB_STATS_FINE_CLOCK_HEADER

#include <time.h>  // struct timespec

namespace mongo {

    class FineClock {
    public:

        typedef timespec WallTime;

        static WallTime now() {
            struct timespec ts;
            clock_gettime(CLOCK_MONOTONIC, &ts);
            return ts;
        }

        static uint64_t diffInNanos( WallTime end, WallTime start ) {
            uint64_t diff;
            if ( end.tv_nsec < start.tv_nsec ) {
                diff = 1000000000 * ( end.tv_sec - start.tv_sec - 1);
                diff += 1000000000 + end.tv_nsec - start.tv_nsec;
            }
            else {
                diff = 1000000000 * ( end.tv_sec - start.tv_sec );
                diff += end.tv_nsec - start.tv_nsec;
            }
            return diff;
        }

    };
}

#endif  // DB_STATS_FINE_CLOCK_HEADER

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mongodb
Author(s): Nate Koenig
autogenerated on Fri Jan 11 12:15:18 2013