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/*
********************************************************************************************************************
* usb host driver
*
* (c) Copyright 2007-2010, javen.China
* All Rights Reserved
*
* File Name : usb_list.c
*
* Author : javen
*
* Version : 2.0
*
* Date : 2010.03.02
*
* Description : 预先分配256个list head给list使用
*
* History :
*
********************************************************************************************************************
*/
#include "usb_host_base_types.h"
#include "usb_os_platform.h"
#include "usb_list.h"
#include "Horse.h"
static void *list_memory_base = NULL;
#define MAX_LIST_BLOCK_NUM 256
/*
*******************************************************************************
* ListMemoryInit
*
* Description:
* 预先分配256个list head
*
* Parameters:
* void
*
* Return value:
* 0 : success
* !0 : fail
*
* note:
* void
*
*******************************************************************************
*/
__s32 ListMemoryInit(void)
{
list_memory_base = HorseHeadInit(sizeof(struct list_head), MAX_LIST_BLOCK_NUM);
if (list_memory_base == NULL)
{
DMSG_PANIC("ERR: HorseHeadInit failed\n");
return -1;
}
return 0;
}
/*
*******************************************************************************
* ListMemoryExit
*
* Description:
* 释放分配的256个list head
*
* Parameters:
* void
*
* Return value:
* 0 : success
* !0 : fail
*
* note:
* void
*
*******************************************************************************
*/
__s32 ListMemoryExit(void)
{
if (list_memory_base)
{
HorseHeadExit(list_memory_base);
list_memory_base = NULL;
}
return 0;
}
/*
*******************************************************************************
* ListMemoryMalloc
*
* Description:
* 从事先分配好的256个list head中取出没有使用的list head。
*
* Parameters:
* void
*
* Return value:
* 返回可用的list head的地址
*
* note:
* void
*
*******************************************************************************
*/
void *ListMemoryMalloc(__u32 size, u8 *file_name, u32 line_nr)
{
void *addr = NULL;
addr = HorseBlockMalloc(list_memory_base);
if (addr == NULL)
{
addr = USB_OS_MALLOC(size, file_name, line_nr);
DMSG_INFO("HorseBlockMalloc failed, must USB_OS_MALLOC, addr = %x\n", addr);
}
return addr;
}
/*
*******************************************************************************
* ListMemoryFree
*
* Description:
* 释放ListMemoryMalloc分配的list head
*
* Parameters:
* void
*
* Return value:
* void
*
* note:
* void
*
*******************************************************************************
*/
void ListMemoryFree(void *addr, u8 *file_name, u32 line_nr)
{
if (addr)
{
if (HorseBlockFree(list_memory_base, addr) != 0)
{
DMSG_INFO("HorseBlockFree failed, must USB_OS_FREE, addr = %x\n", addr);
USB_OS_FREE(addr);
}
}
}
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