Added pj_list_size()

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@192 74dad513-b988-da41-8d7b-12977e46ad98

2 files changed, 24 insertions, 0 deletions

diff --git a/pjlib/include/pj/list.h b/pjlib/include/pj/list.h
index 4f2e5145..24328dec 100644
--- a/pjlib/include/pj/list.h
+++ b/pjlib/include/pj/list.h
@@ -250,6 +250,16 @@ PJ_IDECL(pj_list_type*) pj_list_search(pj_list_type *list, void *value,
 
 
 /**
+ * Traverse the list to get the number of elements in the list.
+ *
+ * @param list	    The list head.
+ *
+ * @return	    Number of elements.
+ */
+PJ_IDECL(pj_size_t) pj_list_size(pj_list_type *list);
+
+
+/**
  * @}
  */
 
diff --git a/pjlib/include/pj/list_i.h b/pjlib/include/pj/list_i.h
index c6d95c80..2a8bf582 100644
--- a/pjlib/include/pj/list_i.h
+++ b/pjlib/include/pj/list_i.h
@@ -116,3 +116,17 @@ pj_list_search(pj_list_type *list, void *value,
     return p==list ? NULL : p;
 }
 
+
+PJ_IDEF(pj_size_t) pj_list_size(pj_list_type *list)
+{
+    pj_list *node = (pj_list*) ((pj_list*)list)->next;
+    pj_size_t count = 0;
+
+    while (node != list) {
+	++count;
+	node = node->next;
+    }
+
+    return count;
+}
+