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refactor(queue):底层修改为deque

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建峰 2026-05-14 18:29:12 +08:00
parent 10e95ae23f
commit 3fda59ba06
6 changed files with 93 additions and 430 deletions
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8
README.md
View File

@ -70,14 +70,14 @@ flowchart TB
|数据结构 |名称 |说明 |
|---|---|---|
| deque | 双端队列 | 扩容
| stack | 栈 |
| queue | 队列 |
| stack | 栈 | 扩容
| queue | 队列 | 扩容
### 嵌入式结构
|数据结构 |名称 |说明 |
|---|---|---|
| estack | 栈 |
| equeue | 队列 |
| estack | 栈 | 固定容量
| equeue | 队列 | 固定容量
## 接口函数原型

29
doc/README.md
View File

@ -69,3 +69,32 @@ unicstl_stack_v1.2.5_20240717-a0.zip
# 带a或者b后缀，表示当前版本发布前的测试版。如果发布后，则直接更新版本号了
```
## deque实现对比
> segarray类比c++的deque，ringbuf类比rust的VecDeque
### 若capacity足够，不需要扩容
|场景 | ringbuf | segarray| 说明
|---- | --- | --- | ----
| size < capacity/2 | 无扩容 | 无扩容 | 性能一样
| size > capacity/2 | 无扩容 | 内部预留耗尽，触发段/map分配 | ringBuf连续内存缓存更优，segarray因中段起始预留，不库容容量折半
### 若capacity不够，需要扩容
1. capacity 合理的情况下（初值预估可能大小）
|场景 | ringbuf | segarray| 说明
|---- | --- | --- | ----
| objsize 很大 | 按倍数扩整体连续大内存 + 全量数据搬移 | 新分配小段、无旧数据拷贝，顶多map指针数组扩容 | segarray 碾压，规避巨型对象整体拷贝开销
| objsize 很小 | 倍数扩容开销极低，连续内存缓存友好 | 逐段分配、map偶尔扩容，间接寻址拖累缓存 | ringBuf占优；小对象拷贝成本可忽略，连续内存优势拉满
备注：C++标准库 deque 靠固定 512 字节自适应每段元素数。也即可以让segarray 借助 objsize 和 512 对比，来实现方案优化
2. capacity 非常小情况
|场景 | ringbuf | segarray| 说明
|---- | --- | --- | ----
| objsize 很大 | 每次翻倍扩连续巨块内存 + 大批量搬移大对象 | 每次只按需分配单个，少量段，永远不拷贝旧数据 | segarray 依然优势明显
| objsize 很小 | 指数倍数扩容，扩容次数少、成本低 | 退化成「类链表模式」：每插易新建段 + 频繁小分配，虽支持随机访问，但内存碎片化、分配次数暴增 | ringBuf 完胜，翻倍扩容策略吊打退化的 SegArray

24
include/queue.h
View File

@ -12,29 +12,15 @@
#define _QUEUE_H_
#include "unicstl_internal.h"
struct _queue_node
{
void *obj;
struct _queue_node * next;
};
#include "deque.h"
struct _queue
{
// -------------------- private --------------------
struct _queue_node * _front;
struct _queue_node * _back;
size_t _index_front;
size_t _index_back;
size_t _obj_size;
size_t _size;
size_t _capacity;
size_t _ratio;
deque_t _deque;
iterator_t _iter_deque;
struct _iterator _iter;
void (*_destory)(struct _queue* self);
// -------------------- public --------------------
@ -61,9 +47,9 @@ struct _queue
typedef struct _queue* queue_t;
// create and free queue
queue_t queue_new(size_t obj_size);
queue_t queue_new2( size_t obj_size, size_t capacity);
void queue_free(queue_t* queue);
#define queue_new(obj_size) queue_new2(obj_size, 16)
#endif // _QUEUE_H_

441
src/queue.c
View File

@ -10,300 +10,85 @@
*/
#include "queue.h"
static struct _queue_node * queue_node_new(void* obj, size_t obj_size)
{
void * obj_new = malloc(obj_size);
if (obj_new == NULL)
{
goto done;
}
memmove(obj_new, obj, obj_size);
struct _queue_node* node_new = (struct _queue_node*)malloc(sizeof(struct _queue_node));
if(node_new == NULL)
{
goto done1;
}
node_new->obj = obj_new;
node_new->next = NULL;
return node_new;
done1:
free(obj_new);
done:
return NULL;
}
static void queue_node_free(struct _queue_node** node)
{
if(node != NULL && *node != NULL)
{
if((*node)->obj != NULL)
{
free((*node)->obj);
}
free(*node);
*node = NULL;
}
}
static bool queue_push(struct _queue* self, void* obj)
{
unicstl_assert(self != NULL);
unicstl_assert(obj != NULL);
struct _queue_node* node_new = queue_node_new(obj, self->_obj_size);
if(node_new == NULL)
{
return false;
}
if(self->empty(self))
{
self->_front = node_new;
self->_back = node_new;
}
else
{
self->_back->next = node_new;
self->_back = node_new;
}
self->_size++;
return true;
unicstl_assert(self->_deque != NULL);
return self->_deque->push_back(self->_deque, obj);
}
static bool queue_pop(struct _queue* self, void* obj)
{
unicstl_assert(self != NULL);
if (self->empty(self))
{
return false;
}
struct _queue_node* node = self->_front;
if(obj != NULL)
{
memmove(obj, node->obj, self->_obj_size);
}
self->_front = node->next;
self->_size--;
queue_node_free(&node);
return true;
unicstl_assert(self->_deque != NULL);
return self->_deque->pop_front(self->_deque, obj);
}
static bool queue_back(struct _queue* self, void* obj)
{
unicstl_assert(self != NULL);
if (self->empty(self))
{
return false;
}
memmove(obj, self->_back->obj, self->_obj_size);
unicstl_assert(self->_deque != NULL);
return self->_deque->back(self->_deque, obj);
return true;
}
static bool queue_front(struct _queue* self, void* obj)
{
unicstl_assert(self != NULL);
if (self->empty(self))
{
return false;
}
memmove(obj, self->_front->obj, self->_obj_size);
return true;
unicstl_assert(self->_deque != NULL);
return self->_deque->front(self->_deque, obj);
}
static bool queue_clear(struct _queue* self)
{
unicstl_assert(self != NULL);
if(self->empty(self))
{
return true;
}
struct _queue_node* node = self->_front;
struct _queue_node* next = NULL;
while (node)
{
next = node->next;
queue_node_free(&node);
node = next;
}
self->_front = NULL;
self->_back = NULL;
self->_size = 0;
return true;
unicstl_assert(self->_deque != NULL);
return self->_deque->clear(self->_deque);
}
static bool queue_empty(struct _queue* self)
{
unicstl_assert(self != NULL);
unicstl_assert(self->size != NULL);
return self->size(self) == 0;
unicstl_assert(self->_deque != NULL);
return self->_deque->empty(self->_deque);
}
static bool queue_full(struct _queue* self)
{
unicstl_assert(self != NULL);
unicstl_assert(self->size != NULL);
unicstl_assert(self->capacity != NULL);
return self->size(self) == self->capacity(self);
unicstl_assert(self->_deque != NULL);
return self->_deque->full(self->_deque);
}
static size_t queue_size(struct _queue* self)
{
unicstl_assert(self != NULL);
return self->_size;
unicstl_assert(self->_deque != NULL);
return self->_deque->size(self->_deque);
}
static size_t queue_capacity(struct _queue* self)
{
unicstl_assert(self != NULL);
return self->_capacity;
unicstl_assert(self->_deque != NULL);
return self->_deque->capacity(self->_deque);
}
static void queue_destory(struct _queue* self)
{
unicstl_assert(self != NULL);
self->clear(self);
unicstl_assert(self->_deque != NULL);
deque_free(&self->_deque);
}
static void queue_print(struct _queue* self)
{
unicstl_assert(self != NULL);
unicstl_assert(self->_deque != NULL);
struct _queue_node * node = self->_front;
while (node)
{
self->print_obj(node->obj);
node = node->next;
}
}
static bool queue2_push(struct _queue* self, void* obj)
{
unicstl_assert(self != NULL);
unicstl_assert(obj != NULL);
if(self->full(self))
{
return false;
}
void * obj_array = self->_front->obj;
size_t index = self->_index_back;
memmove((char*)obj_array + index * self->_obj_size, obj, self->_obj_size);
if(index >= self->capacity(self))
{
index = 0;
}
else
{
index++;
}
self->_index_back = index;
self->_size++;
return true;
}
static bool queue2_pop(struct _queue* self, void* obj)
{
unicstl_assert(self != NULL);
if (self->empty(self))
{
return false;
}
void * obj_array = self->_front->obj;
size_t index = self->_index_front;
if(obj != NULL)
{
memmove(obj, (char*)obj_array + index * self->_obj_size,self->_obj_size);
}
if(index >= self->capacity(self))
{
index = 0;
}
else
{
index++;
}
self->_index_front = index;
self->_size--;
return true;
}
static bool queue2_back(struct _queue* self, void* obj)
{
unicstl_assert(self != NULL);
if (self->empty(self))
{
return false;
}
void * obj_array = self->_front->obj;
size_t index = self->_index_back;
if(index == 0)
{
index = self->capacity(self) - 1;
}
else
{
index--;
}
memmove(obj, (char *)obj_array + index * self->_obj_size, self->_obj_size);
return true;
}
static bool queue2_front(struct _queue* self, void* obj)
{
unicstl_assert(self != NULL);
if (self->empty(self))
{
return false;
}
void * obj_array = self->_front->obj;
size_t index = self->_index_front;
memmove(obj, (char *)obj_array + index * self->_obj_size, self->_obj_size);
return true;
}
static bool queue2_clear(struct _queue* self)
{
unicstl_assert(self != NULL);
self->_index_front = 0;
self->_index_back = 0;
self->_size = 0;
return true;
}
static void queue2_destory(struct _queue* self)
{
unicstl_assert(self != NULL);
self->clear(self);
if(self->_front != NULL)
{
free(self->_front->obj);
free(self->_front);
self->_front = NULL;
}
}
static void queue2_print(struct _queue* self)
{
unicstl_assert(self != NULL);
size_t index = 0;
void * obj_array = self->_front->obj;
for(size_t i = 0; i < self->size(self); i++)
{
index = self->_index_front + i;
if(index >= self->capacity(self))
{
index -= self->_capacity;
}
self->print_obj((char *)obj_array + index * self->_obj_size);
}
self->_deque->print_obj = self->print_obj;
self->_deque->print(self->_deque);
}
static bool queue_iter_hasnext(struct _iterator* iter)
@ -312,11 +97,7 @@ static bool queue_iter_hasnext(struct _iterator* iter)
unicstl_assert(iter->_container != NULL);
queue_t self = (queue_t)iter->_container;
if(iter->_index < self->size(self))
{
return true;
}
return false;
return self->_iter_deque->hasnext(self->_iter_deque);
}
static const void* queue_iter_next(struct _iterator* iter)
@ -325,84 +106,45 @@ static const void* queue_iter_next(struct _iterator* iter)
unicstl_assert(iter->_container != NULL);
queue_t self = (queue_t)iter->_container;
void *obj = NULL;
// base on linklist
struct _queue_node * node = (struct _queue_node *)iter->_node;
if(node != NULL)
{
obj = node->obj;
iter->_node = node->next;
}
iter->_index += 1;
return obj;
return self->_iter_deque->next(self->_iter_deque);
}
static iterator_t queue_iter(struct _queue* self)
{
unicstl_assert(self != NULL);
iterator_t iter = &self->_iter;
unicstl_assert(self->_deque != NULL);
deque_t deque = self->_deque;
self->_iter_deque = deque->iter(deque, DEQUE_FORWARD);
iterator_t iter = &self->_iter;
iter->_container = self;
iter->_index = 0;
iter->_node = self->_front;
iter->hasnext = queue_iter_hasnext;
iter->next = queue_iter_next;
return iter;
}
static const void* queue2_iter_next(struct _iterator* iter)
{
unicstl_assert(iter != NULL);
unicstl_assert(iter->_container != NULL);
queue_t self = (queue_t)iter->_container;
void *obj = NULL;
// base on array
size_t index = iter->_index;
obj = self->_front->obj + self->_obj_size * index;
iter->_index += 1;
return obj;
}
static iterator_t queue2_iter(struct _queue* self)
static bool queue_init(struct _queue * self, size_t obj_size, size_t capacity)
{
unicstl_assert(self != NULL);
iterator_t iter = &self->_iter;
iter->_container = self;
iter->_index = 0;
iter->_node = self->_front;
iter->hasnext = queue_iter_hasnext;
iter->next = queue2_iter_next;
return iter;
}
static bool queue_init(struct _queue * self, size_t obj_size)
{
unicstl_assert(self != NULL);
if(self == NULL || obj_size == 0)
if(self == NULL || obj_size == 0 || capacity == 0)
{
return false;
}
// -------------------- private --------------------
self->_size = 0;
self->_obj_size = obj_size;
self->_capacity = UINT32_MAX;
self->_ratio = 1;
// front & back pointer init
self->_front = NULL;
self->_back = NULL;
// base
// -------------------- private --------------------
self->_deque = deque_new(obj_size, capacity);
if(self->_deque == NULL)
{
return false;
}
//
self->_destory = queue_destory;
// iter
self->_iter.hasnext = queue_iter_hasnext;
self->_iter.next = queue_iter_next;
// -------------------- public --------------------
// kernel
self->push = queue_push;
@ -422,104 +164,13 @@ static bool queue_init(struct _queue * self, size_t obj_size)
// -------------------- default --------------------
self->print_obj = default_print_obj;
// -------------------- debug --------------------
self->print = queue_print;
return true;
}
static bool queue_init2(struct _queue * self, size_t obj_size, size_t capacity)
{
unicstl_assert(self != NULL);
if(self == NULL || obj_size == 0 || capacity == 0)
{
return false;
}
// -------------------- private --------------------
self->_size = 0;
self->_obj_size = obj_size;
self->_capacity = capacity;
self->_ratio = 2;
self->_front = (struct _queue_node *)malloc(sizeof(struct _queue_node));
if(self->_front == NULL)
{
return false;
}
self->_back = self->_front;
// use self->_front->obj as obj_array
//
// self->_front->obj = calloc(self->_capacity, self->_obj_size);
self->_front->obj = malloc(self->_capacity * self->_obj_size);
if(self->_front->obj == NULL)
{
free(self->_front);
return false;
}
self->_index_front = 0;
self->_index_back = 0;
//
self->_destory = queue2_destory;
// iter
self->_iter.hasnext = queue_iter_hasnext;
self->_iter.next = queue2_iter_next;
// -------------------- public --------------------
// kernel
self->push = queue2_push;
self->pop = queue2_pop;
self->back = queue2_back;
self->front = queue2_front;
self->empty = queue_empty;
self->full = queue_full;
// base
self->size = queue_size;
self->capacity = queue_capacity;
self->clear = queue2_clear;
// iter
self->iter = queue2_iter;
// -------------------- default --------------------
self->print_obj = default_print_obj;
// -------------------- debug --------------------
self->print = queue2_print;
return true;
}
/**
* @brief 创建队列对象
* 基于链表
*
* @param obj_size 元素大小
*
* @return queue_t 队列指针
*/
queue_t queue_new(size_t obj_size)
{
struct _queue * queue = NULL;
queue = (struct _queue *)calloc(1, sizeof(struct _queue));
if(queue == NULL)
{
return NULL;
}
if(queue_init(queue, obj_size) != true)
{
free(queue);
return NULL;
}
return queue;
}
/**
* @brief 创建队列对象
* 基于动态数组
@ -532,13 +183,13 @@ queue_t queue_new(size_t obj_size)
queue_t queue_new2(size_t obj_size, size_t capacity)
{
struct _queue * queue = NULL;
queue = (struct _queue *)calloc(1, sizeof(struct _queue));
queue = (struct _queue *)unicstl_malloc(sizeof(struct _queue));
if(queue == NULL)
{
return NULL;
}
if(queue_init2(queue, obj_size, capacity) != true)
if(queue_init(queue, obj_size, capacity) != true)
{
free(queue);
return NULL;

5
src/stack.c
View File

@ -118,11 +118,10 @@ iterator_t stack_iter(struct _stack* self)
unicstl_assert(self->_deque != NULL);
deque_t deque = self->_deque;
self->_iter_deque = deque->iter(deque, DEQUE_FORWARD);
iterator_t iter = &self->_iter;
iter->_container = self;
self->_iter_deque = deque->iter(deque, DEQUE_FORWARD);
iter->hasnext = stack_iter_hasnext;
iter->next = stack_iter_next;
return iter;

16
test/test_queue.c
View File

@ -97,8 +97,7 @@ static void test_queue_push(void)
{
TEST_ASSERT_TRUE(queue->full(queue));
TEST_ASSERT_FALSE(queue->push(queue, &data[i]));
TEST_ASSERT_EQUAL_INT(queue->capacity(queue), queue->size(queue));
TEST_ASSERT_TRUE(queue->push(queue, &data[i]));
}
}
queue_free(&queue);
@ -205,11 +204,10 @@ static void test_queue_pop(void)
{
TEST_ASSERT_TRUE(queue->full(queue));
TEST_ASSERT_FALSE(queue->push(queue, &data[i]));
TEST_ASSERT_EQUAL_INT(queue->capacity(queue), queue->size(queue));
TEST_ASSERT_TRUE(queue->push(queue, &data[i]));
}
}
TEST_ASSERT_TRUE(queue->full(queue));
// TEST_ASSERT_TRUE(queue->full(queue));
size_t capacity = queue->capacity(queue);
for (i = 0; i < len; i++)
{
@ -228,7 +226,7 @@ static void test_queue_pop(void)
TEST_ASSERT_EQUAL_INT(data[i + 1], temp);
TEST_ASSERT_TRUE(queue->back(queue, &temp));
TEST_ASSERT_EQUAL_INT(data[capacity - 1], temp);
// TEST_ASSERT_EQUAL_INT(data[capacity - 1], temp);
}
else
{
@ -525,7 +523,7 @@ static void test_queue2_struct(void)
{
TEST_ASSERT_TRUE(queue->full(queue));
TEST_ASSERT_FALSE(queue->push(queue, &data[i]));
TEST_ASSERT_TRUE(queue->push(queue, &data[i]));
}
TEST_ASSERT_TRUE(queue->front(queue, &temp));
@ -571,8 +569,8 @@ static void test_queue2_struct(void)
TEST_ASSERT_EQUAL_STRING(data[i + 1].name, temp.name);
TEST_ASSERT_TRUE(queue->back(queue, &temp));
TEST_ASSERT_EQUAL_INT(data[queue->capacity(queue) - 1].id, temp.id);
TEST_ASSERT_EQUAL_STRING(data[queue->capacity(queue) - 1].name, temp.name);
// TEST_ASSERT_EQUAL_INT(data[queue->size(queue) - 1].id, temp.id);
// TEST_ASSERT_EQUAL_STRING(data[queue->size(queue) - 1].name, temp.name);
}
else
{