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63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
// Copyright 2020-2023 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef PLATFORM_IMPL_LINUX_THREAD_POOL_H_
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#define PLATFORM_IMPL_LINUX_THREAD_POOL_H_
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#include <atomic>
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#include <memory>
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#include <queue>
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#include <thread>
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#include <utility>
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#include <vector>
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#include "absl/base/thread_annotations.h"
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#include "absl/synchronization/mutex.h"
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#include "internal/platform/runnable.h"
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namespace nearby {
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namespace linux {
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class ThreadPool {
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public:
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ThreadPool(const ThreadPool &) = delete;
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ThreadPool(ThreadPool &&) = delete;
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ThreadPool &operator=(const ThreadPool &) = delete;
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ThreadPool &operator=(ThreadPool &&) = delete;
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explicit ThreadPool(size_t max_pool_size);
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~ThreadPool();
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bool Start() ABSL_LOCKS_EXCLUDED(mutex_);
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// Runs a task on thread pool. The result indicates whether the task is put
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// into the thread pool.
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bool Run(Runnable &&task) ABSL_LOCKS_EXCLUDED(mutex_);
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void ShutDown() ABSL_LOCKS_EXCLUDED(mutex_);
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private:
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Runnable NextTask() ABSL_LOCKS_EXCLUDED(mutex_);
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size_t max_pool_size_;
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std::atomic_bool shut_down_;
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absl::Mutex mutex_;
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std::vector<std::thread> threads_ ABSL_GUARDED_BY(mutex_);
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std::queue<Runnable> tasks_ ABSL_GUARDED_BY(mutex_);
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};
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} // namespace linux
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} // namespace nearby
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#endif // PLATFORM_IMPL_LINUX_THREAD_POOL_H_
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