Mesa (master): exec_list: Add pop_head

[Ian Romanick]

Module: Mesa
Branch: master
Commit: 29eebe9a9a0486f12e33e2818c192ef683fdfede
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=29eebe9a9a0486f12e33e2818c192ef683fdfede

Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Mon Aug 16 18:02:11 2010 -0700

exec_list: Add pop_head

---

 src/glsl/list.h |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/src/glsl/list.h b/src/glsl/list.h
index a70b79d..7647774 100644
--- a/src/glsl/list.h
+++ b/src/glsl/list.h
@@ -378,6 +378,23 @@ struct exec_list {
    }
 
    /**
+    * Remove the first node from a list and return it
+    *
+    * \return
+    * The first node in the list or \c NULL if the list is empty.
+    *
+    * \sa exec_list::get_head
+    */
+   exec_node *pop_head()
+   {
+      exec_node *const n = this->get_head();
+      if (n != NULL)
+	 n->remove();
+
+      return n;
+   }
+
+   /**
     * Move all of the nodes from this list to the target list
     */
    void move_nodes_to(exec_list *target)