宏HASH_DELETE

HASH_DELETE(buf_page_t, hash, buf_pool->page_hash, fold, bpage);

NAME 可理解为 void* next

/*******************************************************************//**
Deletes a struct from a hash table. */

#define HASH_DELETE(TYPE, NAME, TABLE, FOLD, DATA)\
do {\
    hash_cell_t*    cell3333;\
    TYPE*        struct3333;\
\
    HASH_ASSERT_OWNED(TABLE, FOLD)\
\
    cell3333 = hash_get_nth_cell(TABLE, hash_calc_hash(FOLD, TABLE));\
\
    if (cell3333->node == DATA) {\
        HASH_ASSERT_VALID(DATA->NAME);\
        cell3333->node = DATA->NAME;\
    } else {\
        struct3333 = (TYPE*) cell3333->node;\
\
        while (struct3333->NAME != DATA) {\
\
            struct3333 = (TYPE*) struct3333->NAME;\
            ut_a(struct3333);\
        }\
\
        struct3333->NAME = DATA->NAME;\
    }\
    HASH_INVALIDATE(DATA, NAME);\
} )