1 files changed, 163 insertions, 0 deletions
diff --git a/include/rtems/score/resourceimpl.h b/include/rtems/score/resourceimpl.h
new file mode 100644
index 0000000000..69e9a3c5f8
--- /dev/null
+++ b/include/rtems/score/resourceimpl.h
@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * 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_SCORE_RESOURCEIMPL_H
+#define _RTEMS_SCORE_RESOURCEIMPL_H
+
+#include <rtems/score/resource.h>
+#include <rtems/score/chainimpl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @addtogroup ScoreResource
+ *
+ * @{
+ */
+
+/**
+ * @brief Visitor function for resource node iteration.
+ *
+ * The visitor is allowed to extract the node.
+ *
+ * @param[in] node The current resource node.
+ * @param[in] arg The argument passed to _Resource_Iterate().
+ *
+ * @retval true Stop the iteration.
+ * @retval false Continue the iteration.
+ */
+typedef bool (*Resource_Node_visitor)( Resource_Node *node, void *arg );
+
+/**
+ * @brief Iterates over all nodes of a resource dependency tree.
+ *
+ * @param[in] top The top node to start the iteration.  The visitor function is
+ * not invoked for the top node.
+ * @param[in] visitor The visitor function.
+ * @param[in] arg The argument for the visitor function.
+ */
+void _Resource_Iterate(
+  Resource_Node         *top,
+  Resource_Node_visitor  visitor,
+  void                  *arg
+);
+
+RTEMS_INLINE_ROUTINE void _Resource_Node_initialize( Resource_Node *node )
+{
+  node->dependency = NULL;
+  node->root = node;
+  _Chain_Initialize_empty( &node->Resources );
+}
+
+RTEMS_INLINE_ROUTINE void _Resource_Node_set_dependency(
+  Resource_Node    *node,
+  Resource_Control *dependency
+)
+{
+  node->dependency = dependency;
+}
+
+RTEMS_INLINE_ROUTINE Resource_Node *_Resource_Node_get_root(
+  const Resource_Node *node
+)
+{
+  return node->root;
+}
+
+RTEMS_INLINE_ROUTINE void _Resource_Node_set_root(
+  Resource_Node *node,
+  Resource_Node *root
+)
+{
+  node->root = root;
+}
+
+RTEMS_INLINE_ROUTINE bool _Resource_Node_owns_resources( const Resource_Node *node )
+{
+  return !_Chain_Is_empty( &node->Resources );
+}
+
+RTEMS_INLINE_ROUTINE void _Resource_Node_add_resource(
+  Resource_Node    *node,
+  Resource_Control *resource
+)
+{
+  _Chain_Prepend_unprotected( &node->Resources, &resource->Node );
+}
+
+RTEMS_INLINE_ROUTINE void _Resource_Node_extract( Resource_Node *node )
+{
+  _Chain_Extract_unprotected( &node->Node );
+}
+
+RTEMS_INLINE_ROUTINE void _Resource_Initialize( Resource_Control *resource )
+{
+  resource->owner = NULL;
+  _Chain_Initialize_empty( &resource->Rivals );
+}
+
+RTEMS_INLINE_ROUTINE void _Resource_Add_rival(
+  Resource_Control *resource,
+  Resource_Node    *node
+)
+{
+  _Chain_Append_unprotected( &resource->Rivals, &node->Node );
+}
+
+RTEMS_INLINE_ROUTINE void _Resource_Extract( Resource_Control *resource )
+{
+  _Chain_Extract_unprotected( &resource->Node );
+}
+
+RTEMS_INLINE_ROUTINE Resource_Node *_Resource_Get_owner(
+  const Resource_Control *resource
+)
+{
+  return resource->owner;
+}
+
+RTEMS_INLINE_ROUTINE void _Resource_Set_owner(
+  Resource_Control *resource,
+  Resource_Node    *owner
+)
+{
+  resource->owner = owner;
+}
+
+/**
+ * @brief Returns true if this is the most recently obtained resource of the
+ * node, and false otherwise.
+ *
+ * Resources are organized in last in first out order (LIFO).
+ *
+ * @param[in] resource The resource in question.
+ * @param[in] node The node that obtained the resource.
+ */
+RTEMS_INLINE_ROUTINE bool _Resource_Is_most_recently_obtained(
+  const Resource_Control *resource,
+  const Resource_Node    *node
+)
+{
+  return &resource->Node == _Chain_Immutable_first( &node->Resources );
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_SCORE_RESOURCEIMPL_H */