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