53 std::string PrettyDuration(uint64_t nano_duration, size_t max_fraction_digits) {  in PrettyDuration()
62 TimeUnit GetAppropriateTimeUnit(uint64_t nano_duration) {  in GetAppropriateTimeUnit()
63   const uint64_t one_sec = 1000 * 1000 * 1000;  in GetAppropriateTimeUnit()
64   const uint64_t one_ms  = 1000 * 1000;  in GetAppropriateTimeUnit()
65   const uint64_t one_us  = 1000;  in GetAppropriateTimeUnit()
77 uint64_t GetNsToTimeUnitDivisor(TimeUnit time_unit) {  in GetNsToTimeUnitDivisor()
78   const uint64_t one_sec = 1000 * 1000 * 1000;  in GetNsToTimeUnitDivisor()
79   const uint64_t one_ms  = 1000 * 1000;  in GetNsToTimeUnitDivisor()
80   const uint64_t one_us  = 1000;  in GetNsToTimeUnitDivisor()
95 std::string FormatDuration(uint64_t nano_duration, TimeUnit time_unit,  in FormatDuration()
98   uint64_t divisor = GetNsToTimeUnitDivisor(time_unit);  in FormatDuration()
113   const uint64_t whole_part = nano_duration / divisor;  in FormatDuration()
114   uint64_t fractional_part = nano_duration % divisor;  in FormatDuration()
122     uint64_t multiplier = 10;  in FormatDuration()
155 uint64_t MilliTime() {  in MilliTime()
159   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000) + now.tv_nsec / UINT64_C(1000000);  in MilliTime()
163   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000) + now.tv_usec / UINT64_C(1000);  in MilliTime()
167 uint64_t MicroTime() {  in MicroTime()
171   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000) + now.tv_nsec / UINT64_C(1000);  in MicroTime()
175   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000) + now.tv_usec;  in MicroTime()
179 uint64_t NanoTime() {  in NanoTime()
183   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000000) + now.tv_nsec;  in NanoTime()
187   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000000) + now.tv_usec * UINT64_C(1000);  in NanoTime()
191 uint64_t ThreadCpuNanoTime() {  in ThreadCpuNanoTime()
195   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000000) + now.tv_nsec;  in ThreadCpuNanoTime()
202 uint64_t ProcessCpuNanoTime() {  in ProcessCpuNanoTime()
206   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000000) + now.tv_nsec;  in ProcessCpuNanoTime()
218 void NanoSleep(uint64_t ns) {  in NanoSleep()
221   tm.tv_nsec = ns - static_cast<uint64_t>(tm.tv_sec) * MsToNs(1000);  in NanoSleep()