[rtservice] Add `rt_list_len` and `rt_slist_len` to rtservice.h .

components/finsh/cmd.c

@@ -49,19 +49,6 @@
 #include <rtthread.h>
 #include "finsh.h"
 
-rt_inline unsigned int rt_list_len(const rt_list_t *l)
-{
-    unsigned int len = 0;
-    const rt_list_t *p = l;
-    while (p->next != l)
-    {
-        p = p->next;
-        len ++;
-    }
-
-    return len;
-}
-
 long hello(void)
 {
     rt_kprintf("Hello RT-Thread!\n");

include/rtservice.h

@@ -104,6 +104,23 @@ rt_inline int rt_list_isempty(const rt_list_t *l)
     return l->next == l;
 }
 
+/**
+ * @brief get the list length
+ * @param l the list to get.
+ */
+rt_inline unsigned int rt_list_len(const rt_list_t *l)
+{
+    unsigned int len = 0;
+    const rt_list_t *p = l;
+    while (p->next != l)
+    {
+        p = p->next;
+        len ++;
+    }
+
+    return len;
+}
+
 /**
  * @brief get the struct for this entry
  * @param node the entry point
@@ -177,6 +194,19 @@ rt_inline rt_slist_t *rt_slist_remove(rt_slist_t *l, rt_slist_t *n)
     return l;
 }
 
+rt_inline unsigned int rt_slist_len(const rt_slist_t *l)
+{
+    unsigned int len = 0;
+    const rt_slist_t *list = l->next;
+    while (list != RT_NULL)
+    {
+        list = list->next;
+        len ++;
+    }
+
+    return len;
+}
+
 /**
  * @brief get the struct for this single list node
  * @param node the entry point