Pass member function to pthread_create

Apparently it's possible to pass a class member function to pthread_create if the member function is declared static.  At least, the following code compiles on gcc with no warnings:

class test {
      public:
      static void* threadf(void* args)
      {
            cout << "testing..." << endl;
            return NULL;
      }
};

int main() {
      test t;

      pthread_t thread;
      pthread_create(&thread, NULL, t.threadf, NULL);      
      pthread_join(thread, NULL);
}

Question:

Is this portable?  Is this allowed by the standard, or is gcc simply allowing this.
chsalviaAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

AlexFMCommented:
Yes, this is allowed by standard. Static class method is actually global function, which can be accessed through class name. Non-static method has hidden "this" parameter. Both static method and global function don't have hidden parameter, this is the difference.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Deepu AbrahamR & D Engineering ManagerCommented:
Yes,static class methods are global hence it can be accessed.

class MyThread
{
....
static void* __stdcall ThreadProc(LPVOID lpVoid);
...
};

call this ThreadProc using _beginthread/ex/CreateThread..

HANDLE h_Thread;
h_Thread = (HANDLE)_beginthreadex(NULL,// Security
                  0,// Stack size - use default
                  ThreadProc,// Thread fn entry point -> note we have not used the class object here
                  (void*)this,// Param for thread any class object etc..if it is there else NULL
                  0,// Init flag
                  &nThreadID);// Thread address
Best Regards,
DeepuAbrahamK
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C++

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.