use std::thread; use std::sync::Arc; use spinlock::Mutex; let count = Arc::new(Mutex::new(0)); let count1 = Arc::clone(&count); let _ = thread::spawn(move || { *count1.lock() += 1; }).join(); assert_eq!(*count.lock(), 1);...
spinlock(constspinlock&) =delete;~spinlock() =default;voidlock() {while(m_lock.test_and_set(std::memory_order_acquire)); }booltry_lock() {return!m_lock.test_and_set(std::memory_order_acquire); }voidunlock() { m_lock.clear(std::memory_order_release); }private: std::atomic_flag m...
实测无锁队列concurrentqueue、boost.spinlock和std::mutex在多线程情况下的表现; 结论: 已经使用std::mutex的std::list或者std::deque,如果Item结构体比较小,使用boost.spinlock代替std::mutex;如果Item比较大,使用std::mutex;新的业务代码可以酌情使用无锁队列concurrentqueue ConcurrentQueue、spinlock和mutex对比测试结果 ...
C++ std::atomic_flag 实现spinLock A spinlock mutex can be implemented in userspace using an atomic_flag. 一旦标识对象初始化完成,只能做三种操作:销毁、清除或设置并查询其先前的值。 这些分别对应析构函数、clear()函数以及test_and_set()函数。 clear和test_and_set操作都可以指定一个内存顺序, clear是...
m_lock.clear(std::memory_order_release); }private: std::atomic_flag m_lock; };#endif//_SPINLOCK_H_20170410_ root@ubuntu:~/c++# cat spinlock.cpp #include"spinlock.h"#include<mutex>#include<future>#include<iostream>#includespinlocklock;intvalue =0;intloop(boolinc,intlimit) { std::...