自实现内存池：按大小分桶，8bit跨度，支持释放。

resp协议pipline测试。

memory/mempool.h

@@ -0,0 +1,67 @@
+#ifndef __MEMORY_POOL_H__
+#define __MEMORY_POOL_H__
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MEMPOOL_PAGE_SIZE           4096
+#define MEMPOOL_BLOCK_MAX_SIZE      512
+#define MEMPOOL_ALIGNMENT           8
+#define MEMPOOL_NUM_CLASSES         (MEMPOOL_BLOCK_MAX_SIZE / MEMPOOL_ALIGNMENT)
+#define MEMPOOL_CACHE_PAGE          2
+
+typedef struct mp_page_s   mp_page_t;
+typedef struct mp_bucket_s mp_bucket_t;
+typedef struct mp_pool_s   mp_pool_t;
+typedef struct mp_large_s  mp_large_t;
+
+typedef enum{
+    MEMPOOL_INVALID_INPUT   = -1,
+    MEMPOOL_MALLOC_ERROR    = -2,
+    MEMPOOL_DOUBLE_FREE     = -3,
+}mp_err_t;
+
+struct mp_page_s{
+    mp_bucket_t     *owner;
+
+    mp_page_t       *next;
+    mp_page_t       *prev;
+
+    void            *free_list;
+
+    uint16_t        free_count;
+    uint16_t        capacity;
+
+    uint64_t        bitmap[8];  // 最多支持 512 个块 (64*8)
+};
+
+struct mp_bucket_s{
+    size_t          block_size;         // 桶中块大小
+    uint32_t        page_count;         // 桶中页数
+    uint32_t        empty_count;        // 空闲页数
+
+    mp_page_t       *empty_pages;     // 完全空闲page
+    mp_page_t       *partial_pages;     // 空闲page
+    mp_page_t       *full_pages;        // 满page
+};
+
+struct mp_large_s{
+    mp_large_t *next;
+    mp_large_t *prev;
+};
+
+struct mp_pool_s{
+    mp_bucket_t     buckets[MEMPOOL_NUM_CLASSES];
+
+    mp_large_t      *large_list;
+};
+
+int mp_create(mp_pool_t *pool);
+int mp_destroy(mp_pool_t *pool);
+
+void *mp_alloc(mp_pool_t *pool, size_t size);
+int mp_free(mp_pool_t *pool, void *ptr);
+
+#endif