folly/folly/synchronization/detail/Spin.h

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * 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.
 */

#pragma once

#include <algorithm>
#include <chrono>
#include <thread>

#include <folly/portability/Asm.h>
#include <folly/synchronization/WaitOptions.h>

namespace folly {
namespace detail {

enum class spin_result { … };

template <typename Clock, typename Duration, typename F>
spin_result spin_pause_until(
    std::chrono::time_point<Clock, Duration> const& deadline,
    WaitOptions const& opt,
    F f) { … }

template <typename Clock, typename Duration, typename F>
spin_result spin_yield_until(
    std::chrono::time_point<Clock, Duration> const& deadline, F f) { … }

} // namespace detail
} // namespace folly