sairate
4108f6c42d
- 新增现代 C++ 教程的 Preface 章节，包括英文和中文版本 - 添加 C++ Primer 练习代码 - 新增 Learn C++ 教程的 C++ 开发简介章节 - 添加头文件解析文档 - 更新 mkdocs.yml，包含新教程的目录结构 - 修改项目设置，使用 Python 3.10环境
44 lines
734 B
C++
44 lines
734 B
C++
#include <atomic>
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#include <thread>
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#include <iostream>
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class mutex {
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std::atomic<bool> flag{false};
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public:
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void lock()
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{
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while (flag.exchange(true, std::memory_order_relaxed));
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std::atomic_thread_fence(std::memory_order_acquire);
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}
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void unlock()
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{
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std::atomic_thread_fence(std::memory_order_release);
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flag.store(false, std::memory_order_relaxed);
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}
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};
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int a = 0;
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int main() {
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mutex mtx_a;
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std::thread t1([&](){
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mtx_a.lock();
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a += 1;
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mtx_a.unlock();
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});
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std::thread t2([&](){
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mtx_a.lock();
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a += 2;
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mtx_a.unlock();
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});
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t1.join();
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t2.join();
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std::cout << a << std::endl;
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return 0;
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} |