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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/time/time.h"
- #include <stdint.h>
- #include <sys/time.h>
- #include <time.h>
- #include <limits>
- #include "base/check_op.h"
- namespace base {
- // static
- TimeDelta TimeDelta::FromTimeSpec(const timespec& ts) {
- return TimeDelta(ts.tv_sec * Time::kMicrosecondsPerSecond +
- ts.tv_nsec / Time::kNanosecondsPerMicrosecond);
- }
- struct timespec TimeDelta::ToTimeSpec() const {
- int64_t microseconds = InMicroseconds();
- time_t seconds = 0;
- if (microseconds >= Time::kMicrosecondsPerSecond) {
- seconds = static_cast<time_t>(InSeconds());
- microseconds -= seconds * Time::kMicrosecondsPerSecond;
- }
- struct timespec result = {
- seconds,
- static_cast<long>(microseconds * Time::kNanosecondsPerMicrosecond)};
- return result;
- }
- // static
- Time Time::FromTimeVal(struct timeval t) {
- DCHECK_LT(t.tv_usec, static_cast<int>(Time::kMicrosecondsPerSecond));
- DCHECK_GE(t.tv_usec, 0);
- if (t.tv_usec == 0 && t.tv_sec == 0)
- return Time();
- if (t.tv_usec == static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1 &&
- t.tv_sec == std::numeric_limits<time_t>::max())
- return Max();
- return Time((static_cast<int64_t>(t.tv_sec) * Time::kMicrosecondsPerSecond) +
- t.tv_usec + kTimeTToMicrosecondsOffset);
- }
- struct timeval Time::ToTimeVal() const {
- struct timeval result;
- if (is_null()) {
- result.tv_sec = 0;
- result.tv_usec = 0;
- return result;
- }
- if (is_max()) {
- result.tv_sec = std::numeric_limits<time_t>::max();
- result.tv_usec = static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1;
- return result;
- }
- int64_t us = us_ - kTimeTToMicrosecondsOffset;
- result.tv_sec = static_cast<time_t>(us / Time::kMicrosecondsPerSecond);
- result.tv_usec = us % Time::kMicrosecondsPerSecond;
- return result;
- }
- } // namespace base
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