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80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/*****************************************************************************
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Copyright (c) 2006, 2013, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/*******************************************************************//**
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@file include/ut0list.ic
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A double-linked list
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Created 4/26/2006 Osku Salerma
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************************************************************************/
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/****************************************************************//**
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Get the first node in the list.
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@return first node, or NULL */
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UNIV_INLINE
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ib_list_node_t*
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ib_list_get_first(
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/*==============*/
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ib_list_t* list) /*!< in: list */
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{
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return(list->first);
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}
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/****************************************************************//**
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Get the last node in the list.
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@return last node, or NULL */
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UNIV_INLINE
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ib_list_node_t*
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ib_list_get_last(
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/*=============*/
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ib_list_t* list) /*!< in: list */
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{
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return(list->last);
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}
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/********************************************************************
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Check if list is empty. */
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UNIV_INLINE
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ibool
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ib_list_is_empty(
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/*=============*/
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/* out: TRUE if empty else FALSE */
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const ib_list_t* list) /* in: list */
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{
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return(!(list->first || list->last));
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}
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/********************************************************************
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Get number of items on list.
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@return number of items on list */
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UNIV_INLINE
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ulint
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ib_list_len(
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/*========*/
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const ib_list_t* list) /*<! in: list */
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{
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ulint len = 0;
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ib_list_node_t* node = list->first;
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while(node) {
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len++;
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node = node->next;
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}
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return (len);
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}
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