/*

 * 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

 *

 *      http://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 "time/clock.h"

#include "absl/time/clock.h"

#include "absl/time/time.h"

namespace ecclesia {

namespace {

// The abseil clock functions are already thread-safe and this clock doesn't

// have any state of its own, so it is also thread-safe. If any state is later

// added to this object then care must be taken to preserve thread-safety.

class RealClock : public Clock {

 public:

  absl::Time Now() const override { return absl::Now(); }

  void Sleep(absl::Duration d) override { absl::SleepFor(d); }

};

}  // namespace

Clock* Clock::RealClock() {

  static Clock& real_clock = *(new class RealClock());

  return &real_clock;

}

}  // namespace ecclesia