C: How do you declare a recursive mutex with POSIX threads?

Question

I am a bit confused on how to declare a recursive mutex using pthread. What I try to do is have only one thread at a time be able to run a piece of code(including functions)

Answer 1

You need to add mutex attributes when creating the mutex.

Call pthread_mutexattr_init, then pthread_mutexattr_settype with PTHREAD_MUTEX_RECURSIVE then use these attributes with pthread_mutex_init. Read man pthread_mutexattr_init for more info.