A Mutex is NonCopyable. Tries to open a Mutex . The mutex class is non-copyable. It is better to utilize a mutex .
But in mutex , there is no such function. You can determine which thread is holding mutex A:. What is the difference between mutex and semaphore. For that, we can use the Mutex <T> type! What are the differences between Mutex & Semaphore? 那什么时候该使用Semaphore,什么时候使用Mutex ?? When to use mutex and when to use semaphore? Mutex 数据类型有两个方法,Lock和Unlock。A mutex contains two functions, lock and unlock. Linux-什么时候应该使用mutex ,什么时候应该使用semaphore? When to use mutex and when to use semaphore? 同理,Mutex <T>也有造成死锁(deadlock)的风险。 Similarly, Mutex <T> comes the risk of deadlocks. 死锁使用std::mutex 来保护多线程中的cout. Deadlock using std::mutex to protect cout in multiple threads. 用一个例子来做总结,首先展示如何使用mutex :. To summarize with an example, here's how to use a mutex :. 调用方线程在调用lock或try_lock前必须不占有mutex 。 A calling thread must not own the mutex prior to calling lock or try_lock. 现在让我们尝试使用Mutex <T>在多个线程间共享值。 Let's now try to share a value between multiple threads using Mutex <T> 为什么pthread_cond_wait需要传递mutex 参数? Why does the pthread_cond_wait() call need to know about the mutex ? 为了新建一个互斥锁,你声明并初始化一个pthread_mutex _t的结构。 To create the mutex lock, you declare and initialize a pthread_mutex _t structure. Pthread_cond_wait为什么需要传递mutex 参数?? Why does the pthread_cond_wait() call need to know about the mutex ? 同时,它也可以分析和显示用户级锁(读/写和mutex )的竞争。 It can also analyze and display contentions of user-level locks(read/write and mutexes ). 请注意,pthread_mutex_destroy()不会释放用来存储pthread_mutex _t的内存。 Pthread_mutex_destroy() does not free the memory used to store the pthread_mutex _t. 这里创建了一个counter变量来存放内含i32的Mutex <T>,类似示例16-12那样。 We create a counter variable to hold an i32 inside a Mutex <T>, as we did in Listing 16-12. 将示例16-14中的Mutex <T>封装进Rc<T>中并在将所有权移入线程之前克隆了Rc<T>。 We will wrap the Mutex <T> in Rc<T> in Listing 16-14 and clone the Rc<T> before moving ownership to the thread. 另一个值得注意的细节是Rust不能避免使用Mutex <T>的全部逻辑错误。 Another thing to note is that Rust can't prevent us from all kinds of logic errors when using Mutex <T> 为了锁住和解锁一个互斥锁,你可以使用pthread_mutex _lock和pthread_mutex_unlock函数。 To lock and unlock the mutex lock, you use the pthread_mutex _lock and pthread_mutex_unlock functions. 然后你有常规的并发原语,像mutex ,读写锁,条件变量等。 And then you have the usual palette of concurrency primitives like mutexes , read write locks, condition variables and the like. 另一个值得注意的细节是Rust不能避免使用Mutex <T>的全部逻辑错误。 Another detail to note is that Rust can't protect you from all kinds of logic errors when you use Mutex <T>
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