2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
194 lines
7.1 KiB
C
194 lines
7.1 KiB
C
/* $NetBSD: rbtree.h,v 1.1 2010/09/25 01:42:40 matt Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas <matt@3am-software.com>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_RBTREE_H_
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#define _SYS_RBTREE_H_
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#if defined(_KERNEL) || defined(_STANDALONE)
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#include <sys/types.h>
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#else
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#include <stdbool.h>
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#include <inttypes.h>
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#endif
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#include <sys/queue.h>
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#include <sys/endian.h>
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__BEGIN_DECLS
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typedef struct rb_node {
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struct rb_node *rb_nodes[2];
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#define RB_DIR_LEFT 0
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#define RB_DIR_RIGHT 1
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#define RB_DIR_OTHER 1
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#define rb_left rb_nodes[RB_DIR_LEFT]
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#define rb_right rb_nodes[RB_DIR_RIGHT]
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/*
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* rb_info contains the two flags and the parent back pointer.
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* We put the two flags in the low two bits since we know that
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* rb_node will have an alignment of 4 or 8 bytes.
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*/
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uintptr_t rb_info;
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#define RB_FLAG_POSITION 0x2
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#define RB_FLAG_RED 0x1
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#define RB_FLAG_MASK (RB_FLAG_POSITION|RB_FLAG_RED)
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#define RB_FATHER(rb) \
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((struct rb_node *)((rb)->rb_info & ~RB_FLAG_MASK))
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#define RB_SET_FATHER(rb, father) \
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((void)((rb)->rb_info = (uintptr_t)(father)|((rb)->rb_info & RB_FLAG_MASK)))
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#define RB_SENTINEL_P(rb) ((rb) == NULL)
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#define RB_LEFT_SENTINEL_P(rb) RB_SENTINEL_P((rb)->rb_left)
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#define RB_RIGHT_SENTINEL_P(rb) RB_SENTINEL_P((rb)->rb_right)
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#define RB_FATHER_SENTINEL_P(rb) RB_SENTINEL_P(RB_FATHER((rb)))
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#define RB_CHILDLESS_P(rb) \
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(RB_SENTINEL_P(rb) || (RB_LEFT_SENTINEL_P(rb) && RB_RIGHT_SENTINEL_P(rb)))
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#define RB_TWOCHILDREN_P(rb) \
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(!RB_SENTINEL_P(rb) && !RB_LEFT_SENTINEL_P(rb) && !RB_RIGHT_SENTINEL_P(rb))
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#define RB_POSITION(rb) \
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(((rb)->rb_info & RB_FLAG_POSITION) ? RB_DIR_RIGHT : RB_DIR_LEFT)
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#define RB_RIGHT_P(rb) (RB_POSITION(rb) == RB_DIR_RIGHT)
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#define RB_LEFT_P(rb) (RB_POSITION(rb) == RB_DIR_LEFT)
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#define RB_RED_P(rb) (!RB_SENTINEL_P(rb) && ((rb)->rb_info & RB_FLAG_RED) != 0)
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#define RB_BLACK_P(rb) (RB_SENTINEL_P(rb) || ((rb)->rb_info & RB_FLAG_RED) == 0)
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#define RB_MARK_RED(rb) ((void)((rb)->rb_info |= RB_FLAG_RED))
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#define RB_MARK_BLACK(rb) ((void)((rb)->rb_info &= ~RB_FLAG_RED))
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#define RB_INVERT_COLOR(rb) ((void)((rb)->rb_info ^= RB_FLAG_RED))
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#define RB_ROOT_P(rbt, rb) ((rbt)->rbt_root == (rb))
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#define RB_SET_POSITION(rb, position) \
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((void)((position) ? ((rb)->rb_info |= RB_FLAG_POSITION) : \
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((rb)->rb_info &= ~RB_FLAG_POSITION)))
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#define RB_ZERO_PROPERTIES(rb) ((void)((rb)->rb_info &= ~RB_FLAG_MASK))
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#define RB_COPY_PROPERTIES(dst, src) \
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((void)((dst)->rb_info ^= ((dst)->rb_info ^ (src)->rb_info) & RB_FLAG_MASK))
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#define RB_SWAP_PROPERTIES(a, b) do { \
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uintptr_t xorinfo = ((a)->rb_info ^ (b)->rb_info) & RB_FLAG_MASK; \
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(a)->rb_info ^= xorinfo; \
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(b)->rb_info ^= xorinfo; \
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} while (/*CONSTCOND*/ 0)
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#ifdef RBDEBUG
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TAILQ_ENTRY(rb_node) rb_link;
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#endif
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} rb_node_t;
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#define RB_TREE_MIN(T) rb_tree_iterate((T), NULL, RB_DIR_LEFT)
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#define RB_TREE_MAX(T) rb_tree_iterate((T), NULL, RB_DIR_RIGHT)
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#define RB_TREE_FOREACH(N, T) \
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for ((N) = RB_TREE_MIN(T); (N); \
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(N) = rb_tree_iterate((T), (N), RB_DIR_RIGHT))
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#define RB_TREE_FOREACH_REVERSE(N, T) \
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for ((N) = RB_TREE_MAX(T); (N); \
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(N) = rb_tree_iterate((T), (N), RB_DIR_LEFT))
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#ifdef RBDEBUG
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TAILQ_HEAD(rb_node_qh, rb_node);
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#define RB_TAILQ_REMOVE(a, b, c) TAILQ_REMOVE(a, b, c)
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#define RB_TAILQ_INIT(a) TAILQ_INIT(a)
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#define RB_TAILQ_INSERT_HEAD(a, b, c) TAILQ_INSERT_HEAD(a, b, c)
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#define RB_TAILQ_INSERT_BEFORE(a, b, c) TAILQ_INSERT_BEFORE(a, b, c)
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#define RB_TAILQ_INSERT_AFTER(a, b, c, d) TAILQ_INSERT_AFTER(a, b, c, d)
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#else
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#define RB_TAILQ_REMOVE(a, b, c) do { } while (/*CONSTCOND*/0)
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#define RB_TAILQ_INIT(a) do { } while (/*CONSTCOND*/0)
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#define RB_TAILQ_INSERT_HEAD(a, b, c) do { } while (/*CONSTCOND*/0)
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#define RB_TAILQ_INSERT_BEFORE(a, b, c) do { } while (/*CONSTCOND*/0)
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#define RB_TAILQ_INSERT_AFTER(a, b, c, d) do { } while (/*CONSTCOND*/0)
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#endif /* RBDEBUG */
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/*
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* rbto_compare_nodes_fn:
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* return a positive value if the first node > the second node.
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* return a negative value if the first node < the second node.
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* return 0 if they are considered same.
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*
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* rbto_compare_key_fn:
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* return a positive value if the node > the key.
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* return a negative value if the node < the key.
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* return 0 if they are considered same.
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*/
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typedef signed int (*const rbto_compare_nodes_fn)(void *,
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const void *, const void *);
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typedef signed int (*const rbto_compare_key_fn)(void *,
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const void *, const void *);
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typedef struct {
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rbto_compare_nodes_fn rbto_compare_nodes;
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rbto_compare_key_fn rbto_compare_key;
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size_t rbto_node_offset;
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void *rbto_context;
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} rb_tree_ops_t;
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typedef struct rb_tree {
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struct rb_node *rbt_root;
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const rb_tree_ops_t *rbt_ops;
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struct rb_node *rbt_minmax[2];
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#ifdef RBDEBUG
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struct rb_node_qh rbt_nodes;
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#endif
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#ifdef RBSTATS
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unsigned int rbt_count;
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unsigned int rbt_insertions;
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unsigned int rbt_removals;
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unsigned int rbt_insertion_rebalance_calls;
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unsigned int rbt_insertion_rebalance_passes;
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unsigned int rbt_removal_rebalance_calls;
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unsigned int rbt_removal_rebalance_passes;
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#endif
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} rb_tree_t;
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#ifdef RBSTATS
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#define RBSTAT_INC(v) ((void)((v)++))
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#define RBSTAT_DEC(v) ((void)((v)--))
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#else
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#define RBSTAT_INC(v) do { } while (/*CONSTCOND*/0)
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#define RBSTAT_DEC(v) do { } while (/*CONSTCOND*/0)
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#endif
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void rb_tree_init(rb_tree_t *, const rb_tree_ops_t *);
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void * rb_tree_insert_node(rb_tree_t *, void *);
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void * rb_tree_find_node(rb_tree_t *, const void *);
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void * rb_tree_find_node_geq(rb_tree_t *, const void *);
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void * rb_tree_find_node_leq(rb_tree_t *, const void *);
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void rb_tree_remove_node(rb_tree_t *, void *);
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void * rb_tree_iterate(rb_tree_t *, void *, const unsigned int);
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#ifdef RBDEBUG
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void rb_tree_check(const rb_tree_t *, bool);
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#endif
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#ifdef RBSTATS
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void rb_tree_depths(const rb_tree_t *, size_t *);
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#endif
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__END_DECLS
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#endif /* _SYS_RBTREE_H_*/
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