forked from Imagelibrary/rtems
9384ac2d65
This patch changes the license to BSD-2 for all source files where the copyright is held by Aeroflex Gaisler, Cobham Gaisler, or Gaisler Research. Some files also includes copyright right statements from OAR and/or embedded Brains in addition to Gaisler. Updates #3053.
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @brief Linked list help functions used by driver manager.
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*/
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/*
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* COPYRIGHT (c) 2009 Cobham Gaisler AB.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Help functions for the Driver Manager. Implements a singly linked list
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* with head and tail pointers for fast insertions/deletions to head and
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* tail in list.
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*/
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#ifndef _DRVIVER_MANAGER_LIST_H_
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#define _DRVIVER_MANAGER_LIST_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*! List description, Singly link list with head and tail pointers. */
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struct drvmgr_list {
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void *head; /*!< First entry in queue */
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void *tail; /*!< Last entry in queue */
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int ofs; /*!< Offset into head and tail to find next field */
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};
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/* Static initialization of list */
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#define LIST_INITIALIZER(type, field) {NULL, NULL, offsetof(type, field)}
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/* Return the first element in list */
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#define LIST_HEAD(list, type) ((type *)(list)->head)
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/* Return the last element in list */
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#define LIST_TAIL(list, type) ((type *)(list)->tail)
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/* Get the next pointer of an entry */
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#define LIST_FIELD(list, entry) (*(void **)((char *)(entry) + (list)->ofs))
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/* Return the next emlement in list */
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#define LIST_NEXT(list, entry, type) ((type *)(LIST_FIELD(list, entry)))
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/* Iterate through all entries in list */
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#define LIST_FOR_EACH(list, entry, type) \
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for (entry = LIST_HEAD(list, type); \
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entry; \
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entry = LIST_NEXT(list, entry, type))
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/*! Initialize a list during runtime
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*
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* \param list The list to initialize
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* \param offset The number of bytes into the entry structure the next pointer
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* is found
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*/
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extern void drvmgr_list_init(struct drvmgr_list *list, int offset);
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/*! Clear list */
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extern void drvmgr_list_empty(struct drvmgr_list *list);
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/*! Add entry to front of list */
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extern void drvmgr_list_add_head(struct drvmgr_list *list, void *entry);
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/*! Add entry to end of list */
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extern void drvmgr_list_add_tail(struct drvmgr_list *list, void *entry);
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/*! Remove entry from front of list */
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extern void drvmgr_list_remove_head(struct drvmgr_list *list);
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/*! Remove entry from anywhere in list */
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extern void drvmgr_list_remove(struct drvmgr_list *list, void *entry);
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#ifdef __cplusplus
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}
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#endif
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#endif
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