From: Matt Turner <mattst88@gmail.com>
Date: Tue, 24 Jun 2014 23:32:29 +0000 (-0700)
Subject: glsl: Add typed foreach_in_list_safe macro.
X-Git-Tag: upstream/10.3~1222
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=da9f0316e6ea628c085040a0c145580301207489;p=platform%2Fupstream%2Fmesa.git

glsl: Add typed foreach_in_list_safe macro.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---

diff --git a/src/glsl/list.h b/src/glsl/list.h
index 914ce96..a4c6408 100644
--- a/src/glsl/list.h
+++ b/src/glsl/list.h
@@ -584,6 +584,15 @@ inline void exec_node::insert_before(exec_list *before)
         (__inst) = (__type *)(__inst)->prev)
 
 /**
+ * This version is safe even if the current node is removed.
+ */ 
+#define foreach_in_list_safe(__type, __node, __list) \
+   for (__type *__node = (__type *)(__list)->head,   \
+               *__next = (__type *)__node->next;     \
+        __next != NULL;                              \
+        __node = __next, __next = (__type *)__next->next)
+
+/**
  * Iterate through two lists at once.  Stops at the end of the shorter list.
  *
  * This is safe against either current node being removed or replaced.