Re: [Boost-users] [Thread] What do I #include?

Khandelwal, Amit wrote:

The way I use mutex is to protect one shared resource. Here is sample code that I cooked up. I am not sure why you want to use a single mutex to protect multiple resources. However, if your use case demands it than wrap those resources in a class and have a mutex as a member variable of that class.

HTH.

Call this file let say ThreadSafeQueue.hpp

#include #include <iostream> #include <queue> #include <deque>

namespace std { namespace threadsafe {

template class tsqueue {

private: std::queue m_queue; boost::mutex mutex;

public:

[snip]

const T& front() { boost::lock_guardboost::mutex lock(mutex); std::cout << "Pop element: " << m_queue.front() << std::endl; return m_queue.front(); }

Ouch. Returning an element by reference could easily lead to trouble when the container is accessed from multiple threads. / Johan