102 lines
2.4 KiB
C++
102 lines
2.4 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/utils/port/config.h"
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#ifdef TD_THREAD_PTHREAD
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#include "td/utils/common.h"
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#include "td/utils/Destructor.h"
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#include "td/utils/invoke.h"
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#include "td/utils/MovableValue.h"
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#include "td/utils/port/detail/ThreadIdGuard.h"
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#include "td/utils/port/thread_local.h"
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#include <tuple>
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#include <type_traits>
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#include <utility>
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#include <pthread.h>
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#include <sched.h>
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namespace td {
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namespace detail {
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class ThreadPthread {
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public:
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ThreadPthread() = default;
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ThreadPthread(const ThreadPthread &other) = delete;
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ThreadPthread &operator=(const ThreadPthread &other) = delete;
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ThreadPthread(ThreadPthread &&) = default;
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ThreadPthread &operator=(ThreadPthread &&other) {
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join();
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is_inited_ = std::move(other.is_inited_);
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thread_ = other.thread_;
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}
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template <class Function, class... Args>
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explicit ThreadPthread(Function &&f, Args &&... args) {
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auto func = create_destructor([args = std::make_tuple(decay_copy(std::forward<Function>(f)),
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decay_copy(std::forward<Args>(args))...)]() mutable {
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invoke_tuple(std::move(args));
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clear_thread_locals();
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});
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pthread_create(&thread_, nullptr, run_thread, func.release());
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is_inited_ = true;
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}
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void join() {
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if (is_inited_.get()) {
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is_inited_ = false;
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pthread_join(thread_, nullptr);
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}
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}
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void detach() {
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if (is_inited_.get()) {
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is_inited_ = false;
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pthread_detach(thread_);
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}
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}
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~ThreadPthread() {
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join();
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}
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static unsigned hardware_concurrency() {
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return 8;
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}
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using id = pthread_t;
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private:
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MovableValue<bool> is_inited_;
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pthread_t thread_;
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template <class T>
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std::decay_t<T> decay_copy(T &&v) {
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return std::forward<T>(v);
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}
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static void *run_thread(void *ptr) {
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ThreadIdGuard thread_id_guard;
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auto func = unique_ptr<Destructor>(static_cast<Destructor *>(ptr));
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func->reset();
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return nullptr;
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}
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};
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namespace this_thread_pthread {
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inline void yield() {
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sched_yield();
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}
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inline ThreadPthread::id get_id() {
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return pthread_self();
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}
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} // namespace this_thread_pthread
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} // namespace detail
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} // namespace td
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#endif
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