Merge branch 'solutions' into 'master'

I have created the destroy function for a buffer

See merge request !2

src/ring_buffer.c

@@ -106,7 +106,25 @@ ssize_t ring_buffer_dequeue(so_ring_buffer_t *ring, void *data, size_t size)
 void ring_buffer_destroy(so_ring_buffer_t *ring)
 {
 	/* TODO: Implement ring_buffer_destroy */
-	(void) ring;
+	if (is_initialised)
+	{
+		pthread_mutex_lock(&init_mutex);
+
+		pthread_mutex_destroy(&ring->mutex);
+		sem_destroy(&ring->rb_full);
+		sem_destroy(&ring->rb_empty);
+
+		ring->cap = 0;
+		ring->len = 0;
+		ring->read_pos = 0;
+		ring->write_pos = 0;
+
+		free(ring->data);
+
+		is_initialised = 0;
+
+		pthread_mutex_unlock(&init_mutex);
+	}
 }
 
 void ring_buffer_stop(so_ring_buffer_t *ring)