220 lines
6.8 KiB
C
220 lines
6.8 KiB
C
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/* Copyright (c) 2011, The Linux Foundation. All rights reserved.
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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 are
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* met:
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE 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
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __LINKED_LIST_H__
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#define __LINKED_LIST_H__
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#include <stdbool.h>
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#include <stdlib.h>
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/** Linked List Return Codes */
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typedef enum
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{
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eLINKED_LIST_SUCCESS = 0,
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/**< Request was successful. */
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eLINKED_LIST_FAILURE_GENERAL = -1,
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/**< Failed because of a general failure. */
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eLINKED_LIST_INVALID_PARAMETER = -2,
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/**< Failed because the request contained invalid parameters. */
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eLINKED_LIST_INVALID_HANDLE = -3,
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/**< Failed because an invalid handle was specified. */
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eLINKED_LIST_UNAVAILABLE_RESOURCE = -4,
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/**< Failed because an there were not enough resources. */
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eLINKED_LIST_INSUFFICIENT_BUFFER = -5,
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/**< Failed because an the supplied buffer was too small. */
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eLINKED_LIST_EMPTY = -6
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/**< Failed because list is empty. */
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}linked_list_err_type;
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/*===========================================================================
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FUNCTION linked_list_init
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DESCRIPTION
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Initializes internal structures for linked list.
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list_data: State of list to be initialized.
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DEPENDENCIES
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N/A
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RETURN VALUE
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Look at error codes above.
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SIDE EFFECTS
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N/A
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===========================================================================*/
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linked_list_err_type linked_list_init(void** list_data);
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/*===========================================================================
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FUNCTION linked_list_destroy
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DESCRIPTION
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Destroys internal structures for linked list.
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p_list_data: State of list to be destroyed.
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DEPENDENCIES
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N/A
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RETURN VALUE
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Look at error codes above.
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SIDE EFFECTS
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N/A
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===========================================================================*/
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linked_list_err_type linked_list_destroy(void** list_data);
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/*===========================================================================
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FUNCTION linked_list_add
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DESCRIPTION
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Adds an element to the head of the linked list. The passed in data pointer
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is not modified or freed. Passed in data_obj is expected to live throughout
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the use of the linked_list (i.e. data is not allocated internally)
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p_list_data: List to add data to the head of.
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data_obj: Pointer to data to add into list
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dealloc: Function used to deallocate memory for this element. Pass NULL
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if you do not want data deallocated during a flush operation
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DEPENDENCIES
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N/A
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RETURN VALUE
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Look at error codes above.
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SIDE EFFECTS
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N/A
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===========================================================================*/
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linked_list_err_type linked_list_add(void* list_data, void *data_obj, void (*dealloc)(void*));
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/*===========================================================================
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FUNCTION linked_list_remove
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DESCRIPTION
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Retrieves data from the list tail. data_obj is the tail element from the list
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passed in by linked_list_add.
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p_list_data: List to remove the tail from.
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data_obj: Pointer to data removed from list
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DEPENDENCIES
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N/A
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RETURN VALUE
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Look at error codes above.
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SIDE EFFECTS
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N/A
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===========================================================================*/
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linked_list_err_type linked_list_remove(void* list_data, void **data_obj);
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/*===========================================================================
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FUNCTION linked_list_empty
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DESCRIPTION
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Tells whether the list currently contains any elements
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p_list_data: List to check if empty.
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DEPENDENCIES
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N/A
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RETURN VALUE
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0/FALSE : List contains elements
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1/TRUE : List is Empty
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Otherwise look at error codes above.
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SIDE EFFECTS
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N/A
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===========================================================================*/
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int linked_list_empty(void* list_data);
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/*===========================================================================
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FUNCTION linked_list_flush
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DESCRIPTION
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Removes all elements from the list and deallocates them using the provided
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dealloc function while adding elements.
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p_list_data: List to remove all elements from.
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DEPENDENCIES
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N/A
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RETURN VALUE
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Look at error codes above.
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SIDE EFFECTS
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N/A
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===========================================================================*/
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linked_list_err_type linked_list_flush(void* list_data);
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/*===========================================================================
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FUNCTION linked_list_search
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DESCRIPTION
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Searches for an element in the linked list.
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p_list_data: List handle.
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data_p: to be stored with the data found; NUll if no match.
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if data_p passed in as NULL, then no write to it.
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equal: Function ptr takes in a list element, and returns
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indication if this the one looking for.
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data_0: The data being compared against.
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rm_if_found: Should data be removed if found?
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DEPENDENCIES
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N/A
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RETURN VALUE
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Look at error codes above.
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SIDE EFFECTS
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N/A
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===========================================================================*/
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linked_list_err_type linked_list_search(void* list_data, void **data_p,
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bool (*equal)(void* data_0, void* data),
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void* data_0, bool rm_if_found);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __LINKED_LIST_H__ */
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