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authorChris Johns <chrisj@rtems.org>2017-12-23 18:18:56 +1100
committerSebastian Huber <sebastian.huber@embedded-brains.de>2018-01-25 08:45:26 +0100
commit2afb22b7e1ebcbe40373ff7e0efae7d207c655a9 (patch)
tree44759efe9374f13200a97e96d91bd9a2b7e5ce2a /cpukit/include/rtems/rbtree.h
parentMAINTAINERS: Add myself to Write After Approval. (diff)
downloadrtems-2afb22b7e1ebcbe40373ff7e0efae7d207c655a9.tar.bz2
Remove make preinstall
A speciality of the RTEMS build system was the make preinstall step. It copied header files from arbitrary locations into the build tree. The header files were included via the -Bsome/build/tree/path GCC command line option. This has at least seven problems: * The make preinstall step itself needs time and disk space. * Errors in header files show up in the build tree copy. This makes it hard for editors to open the right file to fix the error. * There is no clear relationship between source and build tree header files. This makes an audit of the build process difficult. * The visibility of all header files in the build tree makes it difficult to enforce API barriers. For example it is discouraged to use BSP-specifics in the cpukit. * An introduction of a new build system is difficult. * Include paths specified by the -B option are system headers. This may suppress warnings. * The parallel build had sporadic failures on some hosts. This patch removes the make preinstall step. All installed header files are moved to dedicated include directories in the source tree. Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc, etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g. erc32, imx, qoriq, etc. The new cpukit include directories are: * cpukit/include * cpukit/score/cpu/@RTEMS_CPU@/include * cpukit/libnetworking The new BSP include directories are: * bsps/include * bsps/@RTEMS_CPU@/include * bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include There are build tree include directories for generated files. The include directory order favours the most general header file, e.g. it is not possible to override general header files via the include path order. The "bootstrap -p" option was removed. The new "bootstrap -H" option should be used to regenerate the "headers.am" files. Update #3254.
Diffstat (limited to 'cpukit/include/rtems/rbtree.h')
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diff --git a/cpukit/include/rtems/rbtree.h b/cpukit/include/rtems/rbtree.h
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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;
+
+/**
+ * @brief Integer type for compare results.
+ *
+ * The type is large enough to represent pointers and 32-bit signed integers.
+ *
+ * @see rtems_rbtree_compare.
+ */
+typedef long rtems_rbtree_compare_result;
+
+/**
+ * @brief Compares two red-black tree nodes.
+ *
+ * @param[in] first The first node.
+ * @param[in] second The second node.
+ *
+ * @retval positive The key value of the first node is greater than the one of
+ * the second node.
+ * @retval 0 The key value of the first node is equal to the one of the second
+ * node.
+ * @retval negative The key value of the first node is less than the one of the
+ * second node.
+ */
+typedef rtems_rbtree_compare_result ( *rtems_rbtree_compare )(
+ const RBTree_Node *first,
+ const RBTree_Node *second
+);
+
+/**
+ * @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 );
+}
+
+RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_equal(
+ rtems_rbtree_compare_result compare_result
+)
+{
+ return compare_result == 0;
+}
+
+RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_greater(
+ rtems_rbtree_compare_result compare_result
+)
+{
+ return compare_result > 0;
+}
+
+RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_lesser(
+ rtems_rbtree_compare_result compare_result
+)
+{
+ return compare_result < 0;
+}
+
+/**
+ * @brief Tries to find a node for the specified key in the tree.
+ *
+ * @param[in] the_rbtree The red-black tree control.
+ * @param[in] the_node A node specifying the key.
+ * @param[in] compare The node compare function.
+ * @param[in] is_unique If true, then return the first node with a key equal to
+ * the one of the node specified if it exits, else return the last node if it
+ * exists.
+ *
+ * @retval node A node corresponding to the key. If the tree is not unique
+ * and contains duplicate keys, the set of duplicate keys acts as FIFO.
+ * @retval NULL No node exists in the tree for the key.
+ */
+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
+);
+
+/**
+ * @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 );
+}
+
+/**
+ * @brief Inserts the node into the red-black tree.
+ *
+ * In case the node is already a node of a tree, then this function yields
+ * unpredictable results.
+ *
+ * @param[in] the_rbtree The red-black tree control.
+ * @param[in] the_node The node to insert.
+ * @param[in] compare The node compare function.
+ * @param[in] is_unique If true, then reject nodes with a duplicate key, else
+ * insert nodes in FIFO order in case the key value is equal to existing nodes.
+ *
+ * @retval NULL Successfully inserted.
+ * @retval existing_node This is a unique insert and there exists a node with
+ * an equal key in the tree already.
+ */
+rtems_rbtree_node *rtems_rbtree_insert(
+ RBTree_Control *the_rbtree,
+ RBTree_Node *the_node,
+ rtems_rbtree_compare compare,
+ bool is_unique
+);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */