1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/time/time.h" 6 7 #include <stdint.h> 8 #include <sys/time.h> 9 #include <time.h> 10 11 #include <limits> 12 13 #include "base/logging.h" 14 15 namespace base { 16 17 // static 18 TimeDelta TimeDelta::FromTimeSpec(const timespec& ts) { 19 return TimeDelta(ts.tv_sec * Time::kMicrosecondsPerSecond + 20 ts.tv_nsec / Time::kNanosecondsPerMicrosecond); 21 } 22 23 struct timespec TimeDelta::ToTimeSpec() const { 24 int64_t microseconds = InMicroseconds(); 25 time_t seconds = 0; 26 if (microseconds >= Time::kMicrosecondsPerSecond) { 27 seconds = InSeconds(); 28 microseconds -= seconds * Time::kMicrosecondsPerSecond; 29 } 30 struct timespec result = { 31 seconds, 32 static_cast<long>(microseconds * Time::kNanosecondsPerMicrosecond)}; 33 return result; 34 } 35 36 // static 37 Time Time::FromTimeVal(struct timeval t) { 38 DCHECK_LT(t.tv_usec, static_cast<int>(Time::kMicrosecondsPerSecond)); 39 DCHECK_GE(t.tv_usec, 0); 40 if (t.tv_usec == 0 && t.tv_sec == 0) 41 return Time(); 42 if (t.tv_usec == static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1 && 43 t.tv_sec == std::numeric_limits<time_t>::max()) 44 return Max(); 45 return Time((static_cast<int64_t>(t.tv_sec) * Time::kMicrosecondsPerSecond) + 46 t.tv_usec + kTimeTToMicrosecondsOffset); 47 } 48 49 struct timeval Time::ToTimeVal() const { 50 struct timeval result; 51 if (is_null()) { 52 result.tv_sec = 0; 53 result.tv_usec = 0; 54 return result; 55 } 56 if (is_max()) { 57 result.tv_sec = std::numeric_limits<time_t>::max(); 58 result.tv_usec = static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1; 59 return result; 60 } 61 int64_t us = us_ - kTimeTToMicrosecondsOffset; 62 result.tv_sec = us / Time::kMicrosecondsPerSecond; 63 result.tv_usec = us % Time::kMicrosecondsPerSecond; 64 return result; 65 } 66 67 } // namespace base 68
