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Paddle/paddle/fluid/platform/stream_callback_manager.h

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// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
//
// 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 <ThreadPool.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <functional>
#include <future> // NOLINT
#include <memory>
#include <mutex> // NOLINT
#include "paddle/fluid/platform/enforce.h"
namespace paddle {
namespace platform {
// NOTE(zjl): clean StreamCallbackManager to make compilation faster
// Make StreamCallbackManager thread-safe
class StreamCallbackManager {
public:
explicit StreamCallbackManager(const cudaStream_t stream);
~StreamCallbackManager() = default;
void AddCallback(std::function<void()> callback) const;
void Wait() const;
private:
const cudaStream_t stream_;
mutable ::ThreadPool thread_pool_;
mutable std::mutex mtx_;
mutable std::future<void> last_future_;
};
} // namespace platform
} // namespace paddle