LibC: Implement pthread_getattr_np

userspace/libraries/LibC/include/pthread.h

@@ -166,6 +166,9 @@ int			pthread_spin_unlock(pthread_spinlock_t* lock);
 void		pthread_cleanup_pop(int execute);
 void		pthread_cleanup_push(void (*routine)(void*), void* arg);
 
+// non portable APIs
+int pthread_getattr_np(pthread_t thread, pthread_attr_t* attr);
+
 #define _pthread_equal(t1, t2) ((t1) == (t2))
 
 #define _pthread_self() (_get_uthread())

userspace/libraries/LibC/pthread.cpp

@@ -1316,6 +1316,12 @@ int pthread_barrier_wait(pthread_barrier_t* barrier)
 	return 0;
 }
 
+int pthread_getattr_np(pthread_t thread, pthread_attr_t* attr)
+{
+	*attr = thread->attr;
+	return 0;
+}
+
 static void load_dynamic_tls_module(size_t module)
 {
 	auto* uthread = _get_uthread();