Merged revisions 87069 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r87069 | kpfleming | 2007-10-25 18:03:11 -0500 (Thu, 25 Oct 2007) | 2 lines

appending one list to another should leave the first list empty, and not require the user to do that

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@87070 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/linkedlists.h

@@ -693,6 +693,9 @@ struct {								\
   \param list This is a pointer to the list to be appended.
   \param field This is the name of the field (declared using AST_LIST_ENTRY())
   used to link entries of this list together.
+
+  Note: The source list (the \a list parameter) will be empty after
+  calling this macro (the list entries are \b moved to the target list).
  */
 #define AST_LIST_APPEND_LIST(head, list, field) do {			\
       if (!(head)->first) {						\
@@ -702,6 +705,8 @@ struct {								\
 		(head)->last->field.next = (list)->first;		\
 		(head)->last = (list)->last;				\
       }									\
+      (list)->first = NULL;						\
+      (list)->last = NULL;						\
 } while (0)
 
 #define AST_RWLIST_APPEND_LIST AST_LIST_APPEND_LIST