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+/**
+ * @file
+ * 
+ * @brief Constants and Structures Associated with the RBTree API in RTEMS
+ * 
+ * This include file contains all the constants and structures associated
+ * with the RBTree API in RTEMS. The rbtree is a Red Black Tree that
+ * is part of the Super Core. This is the published interface to that
+ * code.
+ */
+
+/*
+ *  Copyright (c) 2010 Gedare Bloom.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_RBTREE_H
+#define _RTEMS_RBTREE_H
+
+#include <rtems/score/rbtree.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup ClassicRBTrees Red-Black Trees
+ *
+ * @ingroup ClassicRTEMS
+ *
+ * @brief A Red-Black Tree container.
+ *
+ * The red-black tree container offers no internal protection against
+ * concurrent access.  The user must ensure that at most one thread at once can
+ * access a red-black tree instance.
+ *
+ * @{
+ */
+
+/**
+ * @typedef rtems_rbtree_node
+ *
+ * A node that can be manipulated in the rbtree.
+ */
+typedef RBTree_Node rtems_rbtree_node;
+
+/**
+ * @typedef rtems_rbtree_control
+ *
+ * The rbtree's control anchors the rbtree.
+ */
+typedef RBTree_Control rtems_rbtree_control;
+
+/**
+ * @copydoc RBTree_Compare_result
+ */
+typedef RBTree_Compare_result rtems_rbtree_compare_result;
+
+/**
+ * @copydoc RBTree_Compare
+ */
+typedef RBTree_Compare rtems_rbtree_compare;
+
+/**
+ * @brief RBTree initializer for an empty rbtree with designator @a name.
+ */
+#define RTEMS_RBTREE_INITIALIZER_EMPTY(name) \
+  RBTREE_INITIALIZER_EMPTY(name)
+
+/**
+ * @brief RBTree definition for an empty rbtree with designator @a name.
+ */
+#define RTEMS_RBTREE_DEFINE_EMPTY(name) \
+  RBTREE_DEFINE_EMPTY(name)
+
+/**
+ * @brief Initialize a RBTree header.
+ *
+ * This routine initializes @a the_rbtree structure to manage the
+ * contiguous array of @a number_nodes nodes which starts at
+ * @a starting_address.  Each node is of @a node_size bytes.
+ *
+ * @param[in] the_rbtree is the pointer to rbtree header
+ * @param[in] compare The node compare function.
+ * @param[in] starting_address is the starting address of first node
+ * @param[in] number_nodes is the number of nodes in rbtree
+ * @param[in] node_size is the size of node in bytes
+ * @param[in] is_unique If true, then reject nodes with a duplicate key, else
+ *   otherwise.
+ */
+void rtems_rbtree_initialize(
+  rtems_rbtree_control *the_rbtree,
+  rtems_rbtree_compare  compare,
+  void                 *starting_address,
+  size_t                number_nodes,
+  size_t                node_size,
+  bool                  is_unique
+);
+
+/**
+ * @brief Initialize this RBTree as Empty
+ *
+ * This routine initializes @a the_rbtree to contain zero nodes.
+ */
+RTEMS_INLINE_ROUTINE void rtems_rbtree_initialize_empty(
+  rtems_rbtree_control *the_rbtree
+)
+{
+  _RBTree_Initialize_empty( the_rbtree );
+}
+
+/**
+ * @brief Set off RBtree.
+ *
+ * This function sets the next and previous fields of the @a node to NULL
+ * indicating the @a node is not part of any rbtree.
+ */
+RTEMS_INLINE_ROUTINE void rtems_rbtree_set_off_tree(
+  rtems_rbtree_node *node
+)
+{
+  _RBTree_Set_off_tree( node );
+}
+
+/**
+ * @brief Is the Node off RBTree.
+ *
+ * This function returns true if the @a node is not on a rbtree. A @a node is
+ * off rbtree if the next and previous fields are set to NULL.
+ */
+RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_node_off_tree(
+  const rtems_rbtree_node *node
+)
+{
+  return _RBTree_Is_node_off_tree( node );
+}
+
+/**
+ * @brief Return pointer to RBTree root.
+ *
+ * This function returns a pointer to the root node of @a the_rbtree.
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_root(
+  const rtems_rbtree_control *the_rbtree
+)
+{
+  return _RBTree_Root( the_rbtree );
+}
+
+/**
+ * @copydoc _RBTree_Minimum()
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_min(
+  const rtems_rbtree_control *the_rbtree
+)
+{
+  return _RBTree_Minimum( the_rbtree );
+}
+
+/**
+ * @copydoc _RBTree_Maximum()
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_max(
+  const rtems_rbtree_control *the_rbtree
+)
+{
+  return _RBTree_Maximum( the_rbtree );
+}
+
+/**
+ * @brief Return pointer to the left child node from this node.
+ *
+ * This function returns a pointer to the left child node of @a the_node.
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_left(
+  const rtems_rbtree_node *the_node
+)
+{
+  return _RBTree_Left( the_node );
+}
+
+/**
+ * @brief Return pointer to the right child node from this node.
+ *
+ * This function returns a pointer to the right child node of @a the_node.
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_right(
+  const rtems_rbtree_node *the_node
+)
+{
+  return _RBTree_Right( the_node );
+}
+
+/**
+ * @copydoc _RBTree_Parent()
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_parent(
+  const rtems_rbtree_node *the_node
+)
+{
+  return _RBTree_Parent( the_node );
+}
+
+/**
+ * @brief Is the RBTree empty.
+ *
+ * This function returns true if there a no nodes on @a the_rbtree and
+ * false otherwise.
+ */
+RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_empty(
+  const rtems_rbtree_control *the_rbtree
+)
+{
+  return _RBTree_Is_empty( the_rbtree );
+}
+
+/**
+ * @brief Is this the minimum node on the RBTree.
+ *
+ * This function returns true if @a the_node is the min node on @a the_rbtree 
+ * and false otherwise.
+ */
+RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_min(
+  const rtems_rbtree_control *the_rbtree,
+  const rtems_rbtree_node *the_node
+)
+{
+  return rtems_rbtree_min( the_rbtree ) == the_node;
+}
+
+/**
+ * @brief Is this the maximum node on the RBTree.
+ *
+ * This function returns true if @a the_node is the max node on @a the_rbtree 
+ * and false otherwise.
+ */
+RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_max(
+  const rtems_rbtree_control *the_rbtree,
+  const rtems_rbtree_node *the_node
+)
+{
+  return rtems_rbtree_max( the_rbtree ) == the_node;
+}
+
+/**
+ * @copydoc _RBTree_Is_root()
+ */
+RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_root(
+  const rtems_rbtree_node *the_node
+)
+{
+  return _RBTree_Is_root( the_node );
+}
+
+/**
+ * @copydoc _RBTree_Find()
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node* rtems_rbtree_find(
+  const rtems_rbtree_control *the_rbtree,
+  const rtems_rbtree_node    *the_node,
+  rtems_rbtree_compare        compare,
+  bool                        is_unique
+)
+{
+  return _RBTree_Find( the_rbtree, the_node, compare, is_unique );
+}
+
+/**
+ * @copydoc _RBTree_Predecessor()
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node* rtems_rbtree_predecessor(
+  const rtems_rbtree_node *node
+)
+{
+  return _RBTree_Predecessor( node );
+}
+
+/**
+ * @copydoc _RBTree_Successor()
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node* rtems_rbtree_successor(
+  const rtems_rbtree_node *node
+)
+{
+  return _RBTree_Successor( node );
+}
+
+/**
+ * @copydoc _RBTree_Extract()
+ */
+RTEMS_INLINE_ROUTINE void rtems_rbtree_extract(
+  rtems_rbtree_control *the_rbtree,
+  rtems_rbtree_node *the_node
+)
+{
+  _RBTree_Extract( the_rbtree, the_node );
+}
+
+/**
+ * @brief Gets a node with the minimum key value from the red-black tree.
+ *
+ * This function extracts a node with the minimum key value from
+ * tree and returns a pointer to that node if it exists.  In case multiple
+ * nodes with a minimum key value exist, then they are extracted in FIFO order.
+ *
+ * @param[in] the_rbtree The red-black tree control.
+ *
+ * @retval NULL The tree is empty.
+ * @retval node A node with the minimal key value on the tree.
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_get_min(
+  rtems_rbtree_control *the_rbtree
+)
+{
+  rtems_rbtree_node *the_node = rtems_rbtree_min( the_rbtree );
+
+  if ( the_node != NULL ) {
+    rtems_rbtree_extract( the_rbtree, the_node );
+  }
+
+  return the_node;
+}
+
+/**
+ * @brief Gets a node with the maximal key value from the red-black tree.
+ *
+ * This function extracts a node with the maximum key value from tree and
+ * returns a pointer to that node if it exists.  In case multiple nodes with a
+ * maximum key value exist, then they are extracted in LIFO order.
+ *
+ * @param[in] the_rbtree The red-black tree control.
+ *
+ * @retval NULL The tree is empty.
+ * @retval node A node with the maximal key value on the tree.
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_get_max(
+  rtems_rbtree_control *the_rbtree
+)
+{
+  rtems_rbtree_node *the_node = rtems_rbtree_max( the_rbtree );
+
+  if ( the_node != NULL ) {
+    rtems_rbtree_extract( the_rbtree, the_node );
+  }
+
+  return the_node;
+}
+
+/**
+ * @brief Peek at the min node on a rbtree.
+ *
+ * This function returns a pointer to the min node from @a the_rbtree 
+ * without changing the tree.  If @a the_rbtree is empty, 
+ * then NULL is returned.
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_peek_min(
+  const rtems_rbtree_control *the_rbtree
+)
+{
+  return rtems_rbtree_min( the_rbtree );
+}
+
+/**
+ * @brief Peek at the max node on a rbtree.
+ *
+ * This function returns a pointer to the max node from @a the_rbtree 
+ * without changing the tree.  If @a the_rbtree is empty, 
+ * then NULL is returned.
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_peek_max(
+  const rtems_rbtree_control *the_rbtree
+)
+{
+  return rtems_rbtree_max( the_rbtree );
+}
+
+/**
+ * @copydoc _RBTree_Insert()
+ */
+RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_insert(
+  rtems_rbtree_control *the_rbtree,
+  rtems_rbtree_node    *the_node,
+  rtems_rbtree_compare  compare,
+  bool                  is_unique
+)
+{
+  return _RBTree_Insert( the_rbtree, the_node, compare, is_unique );
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */