Boost lock_guard< boost :: mutex>抛出EINVAL异常 [英] Boost lock_guard<boost::mutex> Throws EINVAL Exception

问题描述

我有一些静态用户数据，如：

I have some static user data like:

private:
    static std::map<unsigned long, UserDataSharedPtr> userStore_;
    static boost::mutex                               mutexUserData;

public:
    static void RemoveUserData(unsigned long id)
    {
        boost::lock_guard<boost::mutex> lock(mutexUserData);
        std::map<unsigned long, UserDataSharedPtr>::iterator it = userStore_.find(id);
        if (it != userStore_.end())
        {
            userStore_.erase(it);
        }
    }
    static void AddUserData(unsigned long id, UserDataSharedPtr ud)
    {
        boost::lock_guard<boost::mutex> lock(mutexUserData);
        userStore_.insert(std::make_pair(id, ud));
    }

在加载测试中，我的程序崩溃：

And in a load testing, my program crashes at the line:

boost::lock_guard<boost::mutex> lock(mutexUserData);

除了：

terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::lock_error> >'
  what():  boost::lock_error

调用堆栈： p>

The Call Stack:

boost::mutex::lock() at mutex.hpp:55 0x81aeb22  
boost::lock_guard<boost::mutex>::lock_guard() at locks.hpp:257 0x81b2cb3    
..........RemoveUserData() at ..............:69 0x81b0b28   

而$ code boost :: mutex :: lock（）在mutex.hpp

And the boost::mutex::lock() at mutex.hpp

pthread_mutex_t m;
void lock()
{
    int const res=pthread_mutex_lock(&m);
    if(res)
    {
        boost::throw_exception(lock_error(res));
    }
}

这里 pthread_mutex_lock（& m）返回22，我查看22是 EINVAL ：互斥体是使用协议属性创建的，值为PTHREAD_PRIO_PROTECT并且调用线程的优先级高于互斥量当前的优先级上限

Here pthread_mutex_lock(&m) returns 22, and I check 22 is EINVAL: The mutex was created with the protocol attribute having the value PTHREAD_PRIO_PROTECT and the calling thread's priority is higher than the mutex's current priority ceiling

我该怎么办？

我已经很多，但我没有运气。

I googled a lot, but I got no luck.

谢谢。

彼得

推荐答案

实际上，错误更可能是这样的：

Actually, the error is much more likely to be this one:

pthread_mutex_lock（），pthread_mutex_trylock（）和pthread_mutex_unlock（）函数可能会失败，如果：

The pthread_mutex_lock(), pthread_mutex_trylock() and pthread_mutex_unlock() functions may fail if:

[EINVAL]

mutex指定的值不是指初始化的互斥对象。

[EINVAL]
The value specified by mutex does not refer to an initialised mutex object.

这通常是由内存损坏引起的。您可以尝试运行 valgrind 或类似的工具。

This is usually caused by memory corruption. You can try running under valgrind or a similar tool.

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