lcd_ip_cqueue.h
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/*****************************************************************************
* Copyright Statement:
* --------------------
* This software is protected by Copyright and the information contained
* herein is confidential. The software may not be copied and the information
* contained herein may not be used or disclosed except with the written
* permission of MediaTek Inc. (C) 2005
*
* BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
* THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
* RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
* AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
* NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
* SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
* SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
* THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
* NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
* SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
*
* BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
* LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
* AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
* OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
* MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*
* THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
* WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
* LAWS PRINCIPLES. ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
* RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
* THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
*
*****************************************************************************/
/*****************************************************************************
*
* Filename:
* ---------
* lcd_ip_cqueue.h
*
* Project:
* --------
* Maui_Software
*
* Description:
* ------------
* This file defines Generic circular queue data structure definition
*
* Author:
* -------
* -------
*
*============================================================================
* HISTORY
* Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
*------------------------------------------------------------------------------
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*------------------------------------------------------------------------------
* Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
*============================================================================
****************************************************************************/
/*******************************************************************************
* Copyright Statement:
* --------------------
* This software is protected by Copyright and the information contained
* herein is confidential. The software may not be copied and the information
* contained herein may not be used or disclosed except with the written
* permission of MediaTek Inc. (C) 2002
*
*******************************************************************************/
/*********************************************************************
(C) _____ (year of first publication) Sasken communication
Technologies Limited, All rights reserved.
* This file provides a template for .c files. This space
* should be used to describe the file contents
* Component-specific prefix : xxxx
*********************************************************************/
#ifndef _LCD_IP_CQUEUE_H
#define _LCD_IP_CQUEUE_H
/*************************************************************************
* Macros With Parameters
*************************************************************************/
/*************************************************************************
* FUNCTION
* LCD_IP_CQUEUE
*
* DESCRIPTION
*
* PARAMETERS
* _type is the type of item to be put in queue.
* _length is the size of the queue.
*
* RETURNS
*
* GLOBALS AFFECTED
*
*************************************************************************/
#define LCD_IP_CQUEUE(_type, _length) \
struct { \
unsigned int head; \
unsigned int tail; \
unsigned int multiple; \
unsigned int max_used_item; \
kal_bool is_full; \
_type queue[_length]; \
}
/*************************************************************************
* FUNCTION
* LCD_IP_CQUEUE_INIT
*
* DESCRIPTION
*
* PARAMETERS
* _q is the structure variable of the queue
*
* RETURNS
*
* GLOBALS AFFECTED
*
*************************************************************************/
#define LCD_IP_CQUEUE_INIT(_q) \
{ \
(_q).head = (_q).tail = 0; \
(_q).multiple = 1; \
(_q).max_used_item = 0; \
(_q).is_full = KAL_FALSE; \
}
#define LCD_IP_CQUEUE_INIT_N(_q, n) \
{ \
(_q).head = (_q).tail = 0; \
(_q).multiple = n; \
(_q).max_used_item = 0; \
(_q).is_full = KAL_FALSE; \
}
/*************************************************************************
* FUNCTION
* LCD_IP_CQUEUE_INSERT
*
* DESCRIPTION
*
* PARAMETERS
* _q is the structure variable of the queue
* _item is the item to be inserted to the queue
*
* RETURNS
*
* GLOBALS AFFECTED
*
*************************************************************************/
#define LCD_IP_CQUEUE_INSERT(_q, _item) \
{ \
(_q).queue[(_q).tail] = _item; \
(_q).tail = ((_q).tail + 1) % (sizeof((_q).queue)*(_q).multiple/sizeof((_q).queue[0]));\
if ((_q).head == (_q).tail) { (_q).is_full = KAL_TRUE; } \
}
/*************************************************************************
* FUNCTION
* LCD_IP_CQUEUE_REMOVE
*
* DESCRIPTION
*
* PARAMETERS
* _q is the structure variable of the queue
* _item is the variable to which removed item is stored
*
* RETURNS
*
* GLOBALS AFFECTED
*
*************************************************************************/
#define LCD_IP_CQUEUE_REMOVE(_q, _item) \
{ \
_item = (_q).queue[(_q).head]; \
(_q).head = ((_q).head + 1) % (sizeof((_q).queue)*(_q).multiple/sizeof((_q).queue[0]));\
if ((_q).is_full == KAL_TRUE) \
(_q).is_full = KAL_FALSE; \
}
/*************************************************************************
* FUNCTION
* LCD_IP_CQUEUE_NUM_OF_ITEMS
*
* DESCRIPTION
*
* PARAMETERS
* _q is the structure variable of the queue
* _num_of_items is the variable to which the
* number of items in the queue is assigned
*
* RETURNS
*
* GLOBALS AFFECTED
*
*************************************************************************/
#define LCD_IP_CQUEUE_NUM_OF_ITEMS(_q,_num_of_items) \
{ \
_num_of_items = (_q).is_full ? \
(sizeof((_q).queue)*(_q).multiple/sizeof((_q).queue[0])) : \
((_q).tail + (sizeof((_q).queue)*(_q).multiple/sizeof((_q).queue[0])) - (_q).head) \
% (sizeof((_q).queue)*(_q).multiple/sizeof((_q).queue[0])); \
}
/*************************************************************************
* FUNCTION
* LCD_IP_CQUEUE_INDEX
*
* DESCRIPTION
*
* PARAMETERS
* _q is the structure variable of the queue
* _index is the index position of the queue from which queue item to be accessed
* _item is the variable to which element at index is stored.
*
* RETURNS
*
* GLOBALS AFFECTED
*
*************************************************************************/
#define LCD_IP_CQUEUE_INDEX(_q,_index,_item) \
{ \
_item = (_q).queue[((_q).head + _index) % \
(sizeof((_q).queue)*(_q).multiple/sizeof((_q).queue[0]))]; \
}
#define LCD_UP_CQUEUE_UPDATE_MAX(_q, _max) \
{ \
LCD_IP_CQUEUE_NUM_OF_ITEMS(_q, _max) \
if (_max > (_q).max_used_item) \
{ \
(_q).max_used_item = _max; \
} \
else if (_max < (_q).max_used_item) \
{ \
_max = (_q).max_used_item; \
} \
}
/* _q is the structure variable of the queue */
#define LCD_IP_CQUEUE_IS_FULL(_q) ((_q).is_full)
#define LCD_IP_CQUEUE_IS_EMPTY(_q) (((_q).head == (_q).tail) && !(_q).is_full)
#endif /* _LCD_IP_CQUEUE_H */