mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-11 04:56:48 +00:00
二叉搜索树: create、 insert
This commit is contained in:
fslongjin
parent
2b0b727893
commit
eead936244
@ -3,7 +3,7 @@ CFLAGS += -I .
|
||||
|
||||
kernel_common_subdirs:=libELF math
|
||||
|
||||
all: glib.o printk.o cpu.o
|
||||
all: glib.o printk.o cpu.o bitree.o
|
||||
@list='$(kernel_common_subdirs)'; for subdir in $$list; do \
|
||||
echo "make all in $$subdir";\
|
||||
cd $$subdir;\
|
||||
@ -18,4 +18,7 @@ printk.o: printk.c
|
||||
gcc $(CFLAGS) -c printk.c -o printk.o
|
||||
|
||||
cpu.o: cpu.c
|
||||
gcc $(CFLAGS) -c cpu.c -o cpu.o
|
||||
gcc $(CFLAGS) -c cpu.c -o cpu.o
|
||||
|
||||
bitree.o: bitree.c
|
||||
gcc $(CFLAGS) -c bitree.c -o bitree.o
|
||||
118
kernel/common/bitree.c
Normal file
118
kernel/common/bitree.c
Normal file
@ -0,0 +1,118 @@
|
||||
#include "bitree.h"
|
||||
#include <mm/slab.h>
|
||||
#include <common/errno.h>
|
||||
#include <debug/bug.h>
|
||||
|
||||
#define smaller(root, a, b) (root->cmp(a, b) == -1)
|
||||
#define equal(root, a, b) (root->cmp(a, b) == 0)
|
||||
#define greater(root, a, b) (root->cmp(a, b) == 1)
|
||||
|
||||
/**
|
||||
* @brief 创建二叉搜索树
|
||||
*
|
||||
* @param node 根节点
|
||||
* @param cmp 比较函数
|
||||
* @return struct bt_root_t* 树根结构体
|
||||
*/
|
||||
struct bt_root_t *bt_create_tree(struct bt_node_t *node, int (*cmp)(struct bt_node_t *a, struct bt_node_t *b))
|
||||
{
|
||||
if (node == NULL || cmp == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
struct bt_root_t *root = (struct bt_root_t *)kmalloc(sizeof(struct bt_root_t), 0);
|
||||
memset((void *)root, 0, sizeof(struct bt_root_t));
|
||||
root->bt_node = node;
|
||||
root->cmp = cmp;
|
||||
|
||||
return root;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief 创建结点
|
||||
*
|
||||
* @param left 左子节点
|
||||
* @param right 右子节点
|
||||
* @param value 当前节点的值
|
||||
* @return struct bt_node_t*
|
||||
*/
|
||||
struct bt_node_t *bt_create_node(struct bt_node_t *left, struct bt_node_t *right, struct bt_node_t *parent, void *value)
|
||||
{
|
||||
struct bt_node_t *node = (struct bt_node_t *)kmalloc(sizeof(struct bt_node_t), 0);
|
||||
FAIL_ON_TO(node == NULL, nomem);
|
||||
memset((void *)node, 0, sizeof(struct bt_node_t));
|
||||
|
||||
node->left = left;
|
||||
node->right = right;
|
||||
node->value = value;
|
||||
node->parent = parent;
|
||||
|
||||
return node;
|
||||
nomem:;
|
||||
return -ENOMEM;
|
||||
}
|
||||
/**
|
||||
* @brief 插入结点
|
||||
*
|
||||
* @param root 树根结点
|
||||
* @param value 待插入结点的值
|
||||
* @return int 返回码
|
||||
*/
|
||||
int bt_insert(struct bt_root_t *root, void *value)
|
||||
{
|
||||
if (root == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
struct bt_node_t *this_node = root->bt_node;
|
||||
struct bt_node_t *last_node = NULL;
|
||||
struct bt_node_t *insert_node = bt_create_node(NULL, NULL, NULL, value);
|
||||
FAIL_ON_TO((uint64_t)insert_node == (uint64_t)(-ENOMEM), failed);
|
||||
|
||||
while (this_node != NULL)
|
||||
{
|
||||
last_node = this_node;
|
||||
if (smaller(root, insert_node, this_node))
|
||||
this_node = this_node->left;
|
||||
else
|
||||
this_node = this_node->right;
|
||||
}
|
||||
|
||||
insert_node->parent = last_node;
|
||||
if (unlikely(last_node == NULL))
|
||||
root->bt_node = insert_node;
|
||||
else
|
||||
{
|
||||
if (smaller(root, insert_node, last_node))
|
||||
last_node->left = insert_node;
|
||||
else
|
||||
last_node->right = insert_node;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
failed:;
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief 搜索值为value的结点
|
||||
*
|
||||
* @param value 值
|
||||
* @param ret_addr 返回的结点基地址
|
||||
* @return int 错误码
|
||||
*/
|
||||
int bt_query(struct bt_root_t *root, void *value, uint64_t *ret_addr)
|
||||
{
|
||||
struct bt_node_t *this_node = root->bt_node;
|
||||
struct bt_node_t tmp_node = {0};
|
||||
tmp_node.value = value;
|
||||
while (this_node != NULL && !equal(root, &this_node, &tmp_node))
|
||||
{
|
||||
if (smaller(root, &tmp_node, this_node))
|
||||
this_node = this_node->left;
|
||||
else
|
||||
this_node = this_node->right;
|
||||
}
|
||||
|
||||
*ret_addr = (uint64_t)ret_addr;
|
||||
return 0;
|
||||
}
|
||||
54
kernel/common/bitree.h
Normal file
54
kernel/common/bitree.h
Normal file
@ -0,0 +1,54 @@
|
||||
#pragma once
|
||||
|
||||
struct bt_node_t
|
||||
{
|
||||
struct bt_node_t *left;
|
||||
struct bt_node_t *right;
|
||||
struct bt_node_t *parent;
|
||||
void *value; // 数据
|
||||
|
||||
} __attribute__((aligned(sizeof(long))));
|
||||
|
||||
struct bt_root_t
|
||||
{
|
||||
struct bt_node_t *bt_node;
|
||||
int (*cmp)(struct bt_node_t *a, struct bt_node_t *b); // 比较函数 a>b 返回1， a==b返回0, a<b返回-1
|
||||
};
|
||||
|
||||
/**
|
||||
* @brief 创建二叉搜索树
|
||||
*
|
||||
* @param node 根节点
|
||||
* @param cmp 比较函数
|
||||
* @return struct bt_root_t* 树根结构体
|
||||
*/
|
||||
struct bt_root_t *bt_create_tree(struct bt_node_t *node, int (*cmp)(struct bt_node_t *a, struct bt_node_t *b));
|
||||
|
||||
/**
|
||||
* @brief 创建结点
|
||||
*
|
||||
* @param left 左子节点
|
||||
* @param right 右子节点
|
||||
* @param value 当前节点的值
|
||||
* @return struct bt_node_t*
|
||||
*/
|
||||
struct bt_node_t *bt_create_node(struct bt_node_t *left, struct bt_node_t *right, struct bt_node_t *parent, void *value);
|
||||
|
||||
/**
|
||||
* @brief 插入结点
|
||||
*
|
||||
* @param root 树根结点
|
||||
* @param value 待插入结点的值
|
||||
* @return int 返回码
|
||||
*/
|
||||
int bt_insert(struct bt_root_t *root, void *value);
|
||||
|
||||
/**
|
||||
* @brief 搜索值为value的结点
|
||||
*
|
||||
* @param root 树根结点
|
||||
* @param value 值
|
||||
* @param ret_addr 返回的结点基地址
|
||||
* @return int 错误码
|
||||
*/
|
||||
int bt_query(struct bt_root_t *root, void *value, uint64_t *ret_addr);
|
||||
@ -12,3 +12,10 @@
|
||||
kwarn("Assertion failed at %s:%d", __FILE__, __LINE__); \
|
||||
unlikely(__ret_warn_on); \
|
||||
})
|
||||
|
||||
#define FAIL_ON_TO(condition, to) ({ \
|
||||
int __ret_warn_on = !!(condition); \
|
||||
if (unlikely(__ret_warn_on)) \
|
||||
goto to; \
|
||||
unlikely(__ret_warn_on); \
|
||||
})
|
||||
|
||||
@ -123,12 +123,6 @@ hardware_intr_controller xhci_hc_intr_controller =
|
||||
ptr->cycle = 1; \
|
||||
} while (0)
|
||||
|
||||
#define FAIL_ON(value, to) \
|
||||
do \
|
||||
{ \
|
||||
if (unlikely(value != 0)) \
|
||||
goto to; \
|
||||
} while (0)
|
||||
|
||||
// Common TRB types
|
||||
enum
|
||||
@ -854,12 +848,12 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
|
||||
}
|
||||
|
||||
// 关闭legacy支持
|
||||
FAIL_ON(xhci_hc_stop_legacy(cid), failed);
|
||||
FAIL_ON_TO(xhci_hc_stop_legacy(cid), failed);
|
||||
|
||||
// 重置xhci控制器
|
||||
FAIL_ON(xhci_hc_reset(cid), failed);
|
||||
FAIL_ON_TO(xhci_hc_reset(cid), failed);
|
||||
// 端口配对
|
||||
FAIL_ON(xhci_hc_pair_ports(cid), failed);
|
||||
FAIL_ON_TO(xhci_hc_pair_ports(cid), failed);
|
||||
|
||||
// ========== 设置USB host controller =========
|
||||
// 获取页面大小
|
||||
@ -900,7 +894,7 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
|
||||
// 写入设备通知控制寄存器
|
||||
xhci_write_op_reg32(cid, XHCI_OPS_DNCTRL, (1 << 1)); // 目前只有N1被支持
|
||||
|
||||
FAIL_ON(xhci_hc_init_intr(cid), failed_free_dyn);
|
||||
FAIL_ON_TO(xhci_hc_init_intr(cid), failed_free_dyn);
|
||||
++xhci_ctrl_count;
|
||||
spin_unlock(&xhci_controller_init_lock);
|
||||
return;
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user