mtx_init

From cppreference.com

Defined in header `<threads.h>`
int mtx_init( mtx_t* mutex, int type );		(since C11)

Creates a new mutex object with type. The object pointed to by mutex is set to an identifier of the newly created mutex.

type must have one of the following values:

mtx_plain - a simple, non-recursive mutex is created.
mtx_timed - a non-recursive mutex, that supports timeout, is created.
mtx_plain | mtx_recursive - a recursive mutex is created.
mtx_timed | mtx_recursive - a recursive mutex, that supports timeout, is created.

mutex	-	pointer to the mutex to initialize
type	-	the type of the mutex

thrd_success if successful, thrd_error otherwise.