folly/folly/executors/ManualExecutor.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 <cstdio>
#include <memory>
#include <mutex>
#include <queue>

#include <folly/executors/DrivableExecutor.h>
#include <folly/executors/ScheduledExecutor.h>
#include <folly/executors/SequencedExecutor.h>
#include <folly/synchronization/LifoSem.h>

namespace folly {
/// A ManualExecutor only does work when you turn the crank, by calling
/// run() or indirectly with makeProgress() or waitFor().
///
/// The clock for a manual executor starts at 0 and advances only when you
/// ask it to. i.e. time is also under manual control.
///
/// NB No attempt has been made to make anything other than add and schedule
/// threadsafe.
class ManualExecutor : public DrivableExecutor,
                       public ScheduledExecutor,
                       public SequencedExecutor { … };

} // namespace folly