61             return NULL;  in __get_from_free_list()
71     if (item == NULL)  in __get_from_free_list()
79     item->ary[0] = NULL; // 记得清空原来的数据  in __get_from_free_list()
102         if (unlikely(new_one == NULL))  in idr_preload()
130     if (NULL == new_node)  in __idr_grow()
140     if (new_node != NULL) // 设置第0位 = 1, 同时维护树的大小  in __idr_grow()
144     if (new_node != NULL && new_node->full == IDR_FULL)  in __idr_grow()
162     while (NULL == idp->top || idp->top->full == IDR_FULL)  in __idr_get_empty_slot()
169     stk[layer + 1] = NULL; // 标志为数组末尾  in __idr_get_empty_slot()
186         if (layer > 0 && NULL == cur_layer) // 只有非叶子节点才需要开辟儿子节点  in __idr_get_empty_slot()
190             if (NULL == cur_layer)  in __idr_get_empty_slot()
216     if (unlikely(NULL == stk[0] || NULL == idp->top))  in __idr_mark_full()
251     if (unlikely(idp->top == NULL || __id < 0))  in __idr_get_path()
259     stk[layer + 1] = NULL; // 标志数组结尾  in __idr_get_path()
297     if (unlikely(NULL == stk[0] || NULL == idp->top))  in __idr_erase_full()
307         stk[0]->ary[layer_id] = NULL;  in __idr_erase_full()
319         if (NULL == stk[layer - 1]->bitmap) // 儿子是空节点  in __idr_erase_full()
321             stk[layer]->ary[layer_id] = NULL;  in __idr_erase_full()
328             stk[layer - 1] = NULL; // 释放空间记得设置为 NULL  in __idr_erase_full()
340     while (idp->top != NULL && ((idp->top->bitmap <= 1 && idp->top->layer > 0) || // 一条链的情况  in __idr_erase_full()
343         struct idr_layer *t = idp->top->layer ? idp->top->ary[0] : NULL;  in __idr_erase_full()
403     if (unlikely(idp->top == NULL || __id < 0))  in idr_remove()
404         return NULL;  in idr_remove()
409         return NULL; // 找不到路径  in idr_remove()
425     if (unlikely(NULL == idp->top))  in __idr_remove_all_with_free()
437     stk[layer + 1] = NULL; // 标记数组结尾  in __idr_remove_all_with_free()
439     while (cur_layer != NULL)  in __idr_remove_all_with_free()
448             stk[layer]->ary[id] = NULL;  in __idr_remove_all_with_free()
458                     cur_layer->ary[i] = NULL;  in __idr_remove_all_with_free()
468     idp->top = NULL;  in __idr_remove_all_with_free()
479     idp->top = NULL;  in __idr_destroy_with_free()
482     idp->free_list = NULL;  in __idr_destroy_with_free()
492     if (unlikely(NULL == idp->top))  in idr_remove_all()
506     idp->top = NULL;  in idr_destroy()
509     idp->free_list = NULL;  in idr_destroy()
522     if (unlikely(idp->top == NULL || __id < 0))  in idr_find()
525         return NULL;  in idr_find()
533         return NULL;  in idr_find()
537     while (layer >= 0 && cur_layer != NULL)  in idr_find()
560     BUG_ON(nextid == NULL);  in idr_find_next_getid()
561     if (unlikely(idp->top == NULL))  in idr_find_next_getid()
564         return NULL;  in idr_find_next_getid()
585     stk[layer + 1] = NULL; // 标记数组结尾  in idr_find_next_getid()
591         return NULL;  in idr_find_next_getid()
643     return NULL; // 找不到  in idr_find_next_getid()
674     if (unlikely(old_ptr == NULL))  in idr_replace_get_old()
679     *old_ptr = NULL;  in idr_replace_get_old()
681     if (unlikely(idp->top == NULL || __id < 0))  in idr_replace_get_old()
694         if (unlikely(NULL == cur_layer->ary[layer_id]))  in idr_replace_get_old()
737     if (idp == NULL || idp->top == NULL || !idp->top->bitmap)  in idr_empty()
792     if (unlikely(idp == NULL || idp->top == NULL || __id < 0))  in idr_count()
847     if (NULL == ida_p->free_list)  in ida_preload()
851         if (NULL == bitmap)  in ida_preload()
871     if (NULL == ida_p->free_list)  in __get_ida_bitmap()
875             return NULL;  in __get_ida_bitmap()
879     ida_p->free_list = NULL;  in __get_ida_bitmap()
921     BUG_ON(p_id == NULL);  in ida_alloc()
932     if (unlikely(NULL == stk[0]))  in ida_alloc()
940     if (NULL == stk[0]->ary[layer_id])  in ida_alloc()
943     if (unlikely(NULL == stk[0]->ary[layer_id]))  in ida_alloc()
969     if (unlikely(NULL == ida_p || NULL == ida_p->idr.top || id < 0))  in ida_count()
977     if (NULL == bmp)  in ida_count()
992     if (unlikely(NULL == ida_p || NULL == ida_p->idr.top || id < 0))  in ida_remove()
1008     if (unlikely(NULL == b_p || 0 == ((b_p->bitmap[ary_id] >> bmp_id) & 1)))  in ida_remove()
1019             stk[0]->ary[idr_id & IDR_MASK] = NULL; // 记得设置为空  in ida_remove()
1029     if (unlikely(ida_p == NULL))  in ida_destroy()
1036     ida_p->idr.top = NULL;  in ida_destroy()
1038     ida_p->free_list = NULL;  in ida_destroy()
1050     if (ida_p == NULL || ida_p->idr.top == NULL || !ida_p->idr.top->bitmap)  in ida_empty()