From mboxrd@z Thu Jan  1 00:00:00 1970
From: lhh@sourceware.org <lhh@sourceware.org>
Date: 26 Jan 2007 21:45:52 -0000
Subject: [Cluster-devel] cluster/rgmanager/include list.h
Message-ID: <20070126214552.32129.qmail@sourceware.org>
List-Id: <cluster-devel.redhat.com>
To: cluster-devel.redhat.com
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CVSROOT:	/cvs/cluster
Module name:	cluster
Changes by:	lhh at sourceware.org	2007-01-26 21:45:48

Modified files:
	rgmanager/include: list.h 

Log message:
	Add list_prepend macro

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/rgmanager/include/list.h.diff?cvsroot=cluster&r1=1.4&r2=1.5

--- cluster/rgmanager/include/list.h	2006/06/02 17:37:10	1.4
+++ cluster/rgmanager/include/list.h	2007/01/26 21:45:46	1.5
@@ -29,6 +29,14 @@
 	} \
 } while (0)
 
+	
+#define list_prepend(list, newnode) \
+do { \
+	list_insert(list, newnode); \
+	*list = newnode; \
+} while (0)
+
+
 #define list_remove(list, oldnode) \
 do { \
 	if (le(oldnode) == le(*list)) { \
@@ -46,6 +54,11 @@
 	} \
 } while (0)
 
+/*
+   list_do(list, node) {
+   	stuff;
+   } while (!list_done(list, node));
+ */
 #define list_do(list, curr) \
 	if (*list && (curr = *list)) do
 
@@ -53,9 +66,29 @@
 	(curr && (((curr = (void *)le(curr)->le_next)) && (curr == *list)))
 
 /*
-   list_do(list, node) {
-   	stuff;
-   } while (!list_done(list, node));
+ * list_for(list, tmp, counter) {
+ *     stuff;
+ * }
+ * 
+ * counter = # of items in list when done.
+ * * sets cnt to 0 before even checking list;
+ * * checks for valid list
+ * * traverses list, incrementing counter.  If we get to the for loop,
+ *   there must be at least one item in the list
  */
+#define list_for(list, curr, cnt) \
+	if (!(cnt=0) && list && *list) \
+		for (curr = *list; \
+		     (cnt == 0) || (curr != *list); \
+		     curr = (void*)le(curr)->le_next, \
+		     cnt++)
+			
+#define list_for_rev(list, curr, cnt) \
+	if (!(cnt=0) && list && *list) \
+		for (curr = (void *)(le(*list)->le_prev); \
+		     (cnt == 0) || ((void *)curr != le(*list)->le_prev); \
+		     curr = (void*)(le(curr)->le_prev), \
+		     cnt++)
+				   
 
 #endif