比较返回值与EBUSY

Question

So, I'm getting an error on this line of code;

else if(lockError == EBUSY)

I get the error;

use of undeclared identifier 'EBUSY'

How do I compare my int lockError to the EBUSY that might be returned when I try a pthread_mutex_unlock.

Answer 1

You forgot to include #include<errno.h> where EBSUY is defined. See errno.h .