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141 lines
4.9 KiB
C
141 lines
4.9 KiB
C
#ifndef ACL_SLICE_INCLUDE_H
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#define ACL_SLICE_INCLUDE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "acl_define.h"
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#define ACL_SLICE_FLAG_OFF (0)
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#define ACL_SLICE_FLAG_GC1 (1 << 0) /**< 空间节省, 但 gc 性能差 */
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#define ACL_SLICE_FLAG_GC2 (1 << 1) /**< 空间中等, gc 比较好 */
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#define ACL_SLICE_FLAG_GC3 (1 << 2) /**< 空间最大, gc 只当顺序时最好 */
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#define ACL_SLICE_FLAG_RTGC_OFF (1 << 10) /**< 关闭实时内存释放 */
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#define ACL_SLICE_FLAG_LP64_ALIGN (1 << 11) /**< 是否针对64位平台需要按8字节对齐 */
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/**
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* 内存分片池的状态结构
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*/
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typedef struct ACL_SLICE_STAT {
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int nslots; /**< total slice count free in slots */
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int islots; /**< current position of free slots slice */
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int page_nslots; /**< count slice of each page */
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int page_size; /**< length of each malloc */
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int slice_length; /**< length of each slice from user's set */
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int slice_size; /**< length of each slice really allocated */
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int nbuf; /**< count of MEM_BUF allocated */
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acl_uint64 length; /**< total size of all MEM_BUF's buf */
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acl_uint64 used_length; /**< total size of used */
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unsigned int flag; /**< same as the ACL_SLICE's flag been set when created */
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} ACL_SLICE_STAT;
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typedef struct ACL_SLICE ACL_SLICE;
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/**
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* 创建内存片池对象
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* @param name {const char*} 标识名称，以便于调试
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* @param page_size {int} 分配内存时的分配内存页大小
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* @param slice_size {int} 每个固定长度内存片的大小
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* @param flag {unsigned int} 标志位，参见上述：ACL_SLICE_FLAG_xxx
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* @return {ACL_SLICE*} 内存片池对象句柄
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*/
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ACL_API ACL_SLICE *acl_slice_create(const char *name, int page_size,
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int slice_size, unsigned int flag);
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/**
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* 销毁一个内存片池对象
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* @param slice {ACL_SLICE*} 内存片池对象
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*/
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ACL_API void acl_slice_destroy(ACL_SLICE *slice);
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/**
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* 该内存片池中有多少个内存片正在被使用
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* @param slice {ACL_SLICE*} 内存片池对象
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* @return {int} >= 0, 正在被使用的内存片个数
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*/
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ACL_API int acl_slice_used(ACL_SLICE *slice);
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/**
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* 分配一块内存片
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* @param slice {ACL_SLICE*} 内存片池对象
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* @return {void*} 内存片地址
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*/
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ACL_API void *acl_slice_alloc(ACL_SLICE *slice);
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/**
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* 分配一块内存片，且将内存片内容初始化为0
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* @param slice {ACL_SLICE*} 内存片池对象
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* @return {void*} 内存片地址
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*/
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ACL_API void *acl_slice_calloc(ACL_SLICE *slice);
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/**
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* 释放一块内存片
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* @param slice {ACL_SLICE*} 内存片池对象
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* @param ptr {void*} 内存片地址, 必须是由 acl_slice_alloc/acl_slice_calloc 所分配
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*/
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ACL_API void acl_slice_free2(ACL_SLICE *slice, void *ptr);
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/**
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* 释放一块内存片
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* @param ptr {void*} 内存片地址, 必须是由 acl_slice_alloc/acl_slice_calloc 所分配
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*/
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ACL_API void acl_slice_free(void *ptr);
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/**
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* 查看内存片池的当前状态
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* @param slice {ACL_SLICE*} 内存片池对象
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* @param sbuf {ACL_SLICE_STAT*} 存储结果, 不能为空
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*/
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ACL_API void acl_slice_stat(ACL_SLICE *slice, ACL_SLICE_STAT *sbuf);
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/**
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* 手工将内存片池不用的内存进行释放
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* @param slice {ACL_SLICE*} 内存片池对象
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*/
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ACL_API int acl_slice_gc(ACL_SLICE *slice);
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/*----------------------------------------------------------------------------*/
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typedef struct ACL_SLICE_POOL {
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ACL_SLICE **slices; /* the slice array */
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int base; /* the base byte size */
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int nslice; /* the max number of base size */
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unsigned int slice_flag; /* flag: ACL_SLICE_FLAG_GC2[3] | ACL_SLICE_FLAG_RTGC_OFF */
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} ACL_SLICE_POOL;
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ACL_API void acl_slice_pool_init(ACL_SLICE_POOL *asp);
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ACL_API ACL_SLICE_POOL *acl_slice_pool_create(int base, int nslice,
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unsigned int slice_flag);
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ACL_API void acl_slice_pool_destroy(ACL_SLICE_POOL *asp);
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ACL_API int acl_slice_pool_used(ACL_SLICE_POOL *asp);
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ACL_API void acl_slice_pool_clean(ACL_SLICE_POOL *asp);
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ACL_API void acl_slice_pool_reset(ACL_SLICE_POOL *asp);
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ACL_API void acl_slice_pool_free(const char *filename, int line, void *buf);
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ACL_API void acl_slice_pool_gc(ACL_SLICE_POOL *asp);
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ACL_API void *acl_slice_pool_alloc(const char *filename, int line,
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ACL_SLICE_POOL *asp, size_t size);
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ACL_API void *acl_slice_pool_calloc(const char *filename, int line,
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ACL_SLICE_POOL *asp, size_t nmemb, size_t size);
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ACL_API void *acl_slice_pool_realloc(const char *filename, int line,
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ACL_SLICE_POOL *asp, void *ptr, size_t size);
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ACL_API void *acl_slice_pool_memdup(const char *filename, int line,
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ACL_SLICE_POOL *asp, const void *ptr, size_t len);
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ACL_API char *acl_slice_pool_strdup(const char *filename, int line,
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ACL_SLICE_POOL *asp, const char *str);
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ACL_API char *acl_slice_pool_strndup(const char *filename, int line,
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ACL_SLICE_POOL *asp, const char *str, size_t len);
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ACL_API void acl_slice_mem_hook(void *(*malloc_hook)(const char*, int, size_t),
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void *(*calloc_hook)(const char*, int, size_t, size_t),
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void *(*realloc_hook)(const char*, int, void*, size_t),
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void (*free_hook)(const char*, int, void*));
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ACL_API void acl_slice_mem_unhook(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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