smcc/lib/utils/ds/hashtable.h
2025-04-01 00:13:21 +08:00

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#ifndef __SMCC_HASHTABLE_H__
#define __SMCC_HASHTABLE_H__
#include <lib/core.h>
#include <lib/rt/rt_alloc.h>
#include "vector.h"
// 哈希表条目状态标记
typedef enum hash_table_entry_state {
ENTRY_EMPTY,
ENTRY_ACTIVE,
ENTRY_TOMBSTONE
} ht_entry_state_t;
// 哈希表条目结构不管理key/value内存
typedef struct hash_entry {
const void* key; // 由调用者管理
void* value; // 由调用者管理
u32_t hash; // 预计算哈希值
ht_entry_state_t state; // 条目状态
} hash_entry_t;
// 哈希表主体结构
typedef struct hash_table {
vector_header(entries, hash_entry_t); // 使用vector管理条目
u32_t count; // 有效条目数(不含墓碑)
u32_t tombstone_count; // 墓碑数量
u32_t (*hash_func)(const void* key);
int(*key_cmp)(const void* key1, const void* key2);
} hash_table_t;
// WARN you need set hash_func and key_cmp before use
void init_hashtable(hash_table_t* ht) ;
void* hashtable_set(hash_table_t* ht, const void* key, void* value);
void* hashtable_get(hash_table_t* ht, const void* key);
void* hashtable_del(hash_table_t* ht, const void* key);
void hashtable_destory(hash_table_t* ht);
typedef int (*hash_table_iter_func)(const void* key, void* value, void* context);
void hashtable_foreach(hash_table_t* ht, hash_table_iter_func iter_func, void* context);
#endif // __SMCC_HASHTABLE_H__