Using static mutex in a class
- by Dmitry Yudakov
I have a class that I can have many instances of. Inside it creates and initializes some members from a 3rd party library (that use some global variables) and is not thread-safe.
I thought about using static boost::mutex, that would be locked in my class constructor and destructor. Thus creating and destroying instances among my threads would be safe for the 3rd party members.
class MyClass
{
static boost::mutex mx;
// 3rd party library members
public:
MyClass();
~MyClass();
};
MyClass::MyClass()
{
boost::mutex::scoped_lock scoped_lock(mx);
// create and init 3rd party library stuff
}
MyClass::~MyClass()
{
boost::mutex::scoped_lock scoped_lock(mx);
// destroy 3rd party library stuff
}
I cannot link because I receive error:
undefined reference to `MyClass::mx`
Do I need some special initialization of such static member?
Is the whole conception of static mutex wrong?
