mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-12-01 01:36:09 +03:00
94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
// Copyright 2017 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 <zircon/syscalls.h>
|
|
|
|
#include "base/compiler_specific.h"
|
|
#include "base/numerics/checked_math.h"
|
|
#include "base/time/time_override.h"
|
|
|
|
namespace base {
|
|
|
|
namespace {
|
|
|
|
// Helper function to map an unsigned integer with nanosecond timebase to a
|
|
// signed integer with microsecond timebase.
|
|
ALWAYS_INLINE int64_t ZxTimeToMicroseconds(zx_time_t nanos) {
|
|
const zx_time_t micros =
|
|
nanos / static_cast<zx_time_t>(base::Time::kNanosecondsPerMicrosecond);
|
|
return static_cast<int64_t>(micros);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
// Time -----------------------------------------------------------------------
|
|
|
|
namespace subtle {
|
|
Time TimeNowIgnoringOverride() {
|
|
const zx_time_t nanos_since_unix_epoch = zx_clock_get(ZX_CLOCK_UTC);
|
|
CHECK(nanos_since_unix_epoch != 0);
|
|
// The following expression will overflow in the year 289938 A.D.:
|
|
return Time() + TimeDelta::FromMicroseconds(
|
|
ZxTimeToMicroseconds(nanos_since_unix_epoch) +
|
|
Time::kTimeTToMicrosecondsOffset);
|
|
}
|
|
|
|
Time TimeNowFromSystemTimeIgnoringOverride() {
|
|
// Just use TimeNowIgnoringOverride() because it returns the system time.
|
|
return TimeNowIgnoringOverride();
|
|
}
|
|
} // namespace subtle
|
|
|
|
// TimeTicks ------------------------------------------------------------------
|
|
|
|
namespace subtle {
|
|
TimeTicks TimeTicksNowIgnoringOverride() {
|
|
const zx_time_t nanos_since_boot = zx_clock_get(ZX_CLOCK_MONOTONIC);
|
|
CHECK(nanos_since_boot != 0);
|
|
return TimeTicks() +
|
|
TimeDelta::FromMicroseconds(ZxTimeToMicroseconds(nanos_since_boot));
|
|
}
|
|
} // namespace subtle
|
|
|
|
// static
|
|
TimeTicks::Clock TimeTicks::GetClock() {
|
|
return Clock::FUCHSIA_ZX_CLOCK_MONOTONIC;
|
|
}
|
|
|
|
// static
|
|
bool TimeTicks::IsHighResolution() {
|
|
return true;
|
|
}
|
|
|
|
// static
|
|
bool TimeTicks::IsConsistentAcrossProcesses() {
|
|
return true;
|
|
}
|
|
|
|
// static
|
|
TimeTicks TimeTicks::FromZxTime(zx_time_t nanos_since_boot) {
|
|
return TimeTicks(ZxTimeToMicroseconds(nanos_since_boot));
|
|
}
|
|
|
|
zx_time_t TimeTicks::ToZxTime() const {
|
|
CheckedNumeric<zx_time_t> result(base::Time::kNanosecondsPerMicrosecond);
|
|
result *= us_;
|
|
return result.ValueOrDie();
|
|
}
|
|
|
|
// ThreadTicks ----------------------------------------------------------------
|
|
|
|
namespace subtle {
|
|
ThreadTicks ThreadTicksNowIgnoringOverride() {
|
|
const zx_time_t nanos_since_thread_started = zx_clock_get(ZX_CLOCK_THREAD);
|
|
CHECK(nanos_since_thread_started != 0);
|
|
return ThreadTicks() + TimeDelta::FromMicroseconds(
|
|
ZxTimeToMicroseconds(nanos_since_thread_started));
|
|
}
|
|
} // namespace subtle
|
|
|
|
} // namespace base
|