mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-14 14:46:12 -04:00
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
// ...existing code...
|
|
// filepath: /workspace/internal/platform/implementation/linux/system_clock.cc
|
|
// Copyright 2020 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "internal/platform/implementation/system_clock.h"
|
|
|
|
#include <chrono>
|
|
|
|
#include "absl/time/clock.h"
|
|
#include "absl/time/time.h"
|
|
#include "internal/platform/exception.h"
|
|
|
|
namespace nearby {
|
|
|
|
// Initialize global system state.
|
|
void SystemClock::Init() {}
|
|
|
|
// Returns current elapsed (monotonic) time.
|
|
absl::Time SystemClock::ElapsedRealtime() {
|
|
const auto now = std::chrono::steady_clock::now().time_since_epoch();
|
|
const auto nanos =
|
|
std::chrono::duration_cast<std::chrono::nanoseconds>(now).count();
|
|
|
|
// Represent monotonic time as an absl::Time value.
|
|
// (Anchor is arbitrary; only differences matter for elapsed time.)
|
|
return absl::FromUnixNanos(static_cast<int64_t>(nanos));
|
|
}
|
|
|
|
// Pauses current thread for the specified duration.
|
|
Exception SystemClock::Sleep(absl::Duration duration) {
|
|
absl::SleepFor(duration);
|
|
return {Exception::kSuccess};
|
|
}
|
|
|
|
} // namespace nearby
|
|
|
|
|