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https://github.com/MariaDB/server.git
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1c55b845e0
Added support to BACKUP STAGE to maria-backup
This is a port of the code from ES 10.6
See MDEV-5336 for backup stages description.
The following old options are not supported by the new code:
--rsync ; This is because rsync will not work on tables
that are in used.
--no-backup-locks ; This is disabled as mariadb-backup will always
use backup locks for better performance.
62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
#pragma once
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#include <queue>
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#include <vector>
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#include <functional>
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#include <thread>
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#include <mutex>
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#include <condition_variable>
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#include <atomic>
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#include "trx0sys.h"
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class ThreadPool {
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public:
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typedef std::function<void(unsigned)> job_t;
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ThreadPool() { m_stop = false; m_stopped = true; }
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ThreadPool (ThreadPool &&other) = delete;
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ThreadPool & operator= (ThreadPool &&other) = delete;
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ThreadPool(const ThreadPool &) = delete;
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ThreadPool & operator= (const ThreadPool &) = delete;
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bool start(size_t threads_count);
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void stop();
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void push(job_t &&j);
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size_t threads_count() const { return m_threads.size(); }
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private:
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void thread_func(unsigned thread_num);
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std::mutex m_mutex;
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std::condition_variable m_cv;
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std::queue<job_t> m_jobs;
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std::atomic<bool> m_stop;
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std::atomic<bool> m_stopped;
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std::vector<std::thread> m_threads;
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};
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class TasksGroup {
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public:
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TasksGroup(ThreadPool &thread_pool) : m_thread_pool(thread_pool) {
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m_tasks_count = 0;
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m_tasks_result = 1;
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}
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void push_task(ThreadPool::job_t &&j) {
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++m_tasks_count;
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m_thread_pool.push(std::forward<ThreadPool::job_t>(j));
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}
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void finish_task(int res) {
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--m_tasks_count;
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m_tasks_result.fetch_and(res);
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}
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int get_result() const { return m_tasks_result; }
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bool is_finished() const {
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return !m_tasks_count;
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}
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bool wait_for_finish() {
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while (!is_finished())
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std::this_thread::sleep_for(std::chrono::milliseconds(1));
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return get_result();
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}
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private:
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ThreadPool &m_thread_pool;
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std::atomic<size_t> m_tasks_count;
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std::atomic<int> m_tasks_result;
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};
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