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79 lines
2.1 KiB
79 lines
2.1 KiB
/**
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* Copyright 2020 Huawei Technologies Co., Ltd
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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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* http://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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*/
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#include "common/thread_pool.h"
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#include <atomic>
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#include <functional>
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#include <queue>
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#include <stdexcept>
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#include <utility>
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#include <vector>
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#include "register/register_types.h"
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namespace ge {
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FMK_FUNC_HOST_VISIBILITY FMK_FUNC_DEV_VISIBILITY ThreadPool::ThreadPool(uint32_t size) : is_stoped_(false) {
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idle_thrd_num_ = size < 1 ? 1 : size;
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for (uint32_t i = 0; i < idle_thrd_num_; ++i) {
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pool_.emplace_back(ThreadFunc, this);
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}
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}
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FMK_FUNC_HOST_VISIBILITY FMK_FUNC_DEV_VISIBILITY ThreadPool::~ThreadPool() {
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is_stoped_.store(true);
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{
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std::unique_lock<std::mutex> lock{m_lock_};
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cond_var_.notify_all();
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}
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for (std::thread &thd : pool_) {
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if (thd.joinable()) {
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try {
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thd.join();
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} catch (const std::system_error &) {
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GELOGW("system_error");
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} catch (...) {
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GELOGW("exception");
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}
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}
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}
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}
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void ThreadPool::ThreadFunc(ThreadPool *thread_pool) {
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if (thread_pool == nullptr) {
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return;
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}
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while (!thread_pool->is_stoped_) {
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std::function<void()> task;
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{
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std::unique_lock<std::mutex> lock{thread_pool->m_lock_};
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thread_pool->cond_var_.wait(
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lock, [thread_pool] { return thread_pool->is_stoped_.load() || !thread_pool->tasks_.empty(); });
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if (thread_pool->is_stoped_ && thread_pool->tasks_.empty()) {
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return;
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}
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task = std::move(thread_pool->tasks_.front());
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thread_pool->tasks_.pop();
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}
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--thread_pool->idle_thrd_num_;
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task();
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++thread_pool->idle_thrd_num_;
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}
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}
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} // namespace ge
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