[Courses] comparing threads

[Kathryn Hogg]

> Hi all, how do one compare thread ids?  (without overloading the
> comparison functions...that'll be too much)  I just realised that the
> operands cannot compare type pthread_t, and I'm having a hard time
> figuring it out since I need to compare thread id to a table of ids
> (comprised of linked list).  Any suggestion? --Rei

memcmp?

pthread_t *tid1 = ....;
pthread_t *tid2 = .....;

if (memcmp(tid1, tid2, sizeof(pthread_t) == 0) {
cout << "they are equal" << endl;
} else {
cout << "they are not equal" << endl;
}

of course, I would just overload in C++:

inline bool operator == (const pthread_t &t1, const pthread_t &t2)
{
return memcmp(&t1, &t2) == 0;
}

--
Kathryn