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);\ } )