centos

CentOS下C++并发模型怎么选择

小樊
45
2025-08-02 13:22:35
栏目: 编程语言

在CentOS系统下选择C++并发模型时,需要考虑多个因素,包括性能、可维护性、开发难度以及具体的应用场景。以下是一些常见的C++并发模型及其适用场景:

1. POSIX Threads (pthreads)

特点:

适用场景:

示例代码:

#include <pthread.h>
#include <iostream>

void* thread_function(void* arg) {
    std::cout << "Thread is running" << std::endl;
    return nullptr;
}

int main() {
    pthread_t thread;
    pthread_create(&thread, nullptr, thread_function, nullptr);
    pthread_join(thread, nullptr);
    return 0;
}

2. C++11 Threads

特点:

适用场景:

示例代码:

#include <thread>
#include <iostream>

void thread_function() {
    std::cout << "Thread is running" << std::endl;
}

int main() {
    std::thread t(thread_function);
    t.join();
    return 0;
}

3. Boost.Asio

特点:

适用场景:

示例代码:

#include <boost/asio.hpp>
#include <iostream>

using boost::asio::ip::tcp;

void session(tcp::socket sock) {
    try {
        for (;;) {
            char data[1024];
            boost::system::error_code error;
            size_t length = sock.read_some(boost::asio::buffer(data), error);
            if (error == boost::asio::error::eof)
                break; // Connection closed cleanly by peer.
            else if (error)
                throw boost::system::system_error(error); // Some other error.
            boost::asio::write(sock, boost::asio::buffer(data, length));
        }
    } catch (std::exception& e) {
        std::cerr << "Exception in thread: " << e.what() << "\n";
    }
}

int main() {
    try {
        boost::asio::io_context io_context;
        tcp::acceptor acceptor(io_context, tcp::endpoint(tcp::v4(), 12345));
        for (;;) {
            tcp::socket socket(io_context);
            acceptor.accept(socket);
            std::thread(session, std::move(socket)).detach();
        }
    } catch (std::exception& e) {
        std::cerr << "Exception: " << e.what() << "\n";
    }

    return 0;
}

4. Intel Threading Building Blocks (TBB)

特点:

适用场景:

示例代码:

#include <tbb/tbb.h>
#include <iostream>

void parallel_for_example() {
    tbb::parallel_for(tbb::blocked_range<int>(0, 10), [](const tbb::blocked_range<int>& r) {
        for (int i = r.begin(); i != r.end(); ++i) {
            std::cout<< i << " ";
        }
    });
}

int main() {
    parallel_for_example();
    return 0;
}

总结

选择合适的并发模型时,应综合考虑项目的具体需求、团队的技术栈以及预期的性能表现。

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