folly/folly/fibers/BatchSemaphore.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 <folly/fibers/SemaphoreBase.h>

namespace folly {
namespace fibers {

/*
 * Fiber-compatible batch semaphore with ability to perform batch token
 * increment/decrement. Will safely block fibers that wait when no tokens are
 * available and wake fibers when signalled.
 */
class BatchSemaphore : public SemaphoreBase { … };

} // namespace fibers
} // namespace folly