HASH 双向链表前叉节点

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typedef  struct st_HASH_TAB       {    UINT4       hsize;    void        **tab;    tMemPoolId  *memid;    tMutex      *mutex;}HASH_TAB;INT1  flw_sav_add_upload_uc_msgno_bind(INT1 *p_username, UINT1 user_type, UINT4 msg_no, UINT1 msg_type, UINT4 uc_msg_no){    UPLOAD_UC_MSGNO_MAP *p_app_uc_map = NULL;    UPLOAD_UC_MSGNO_MAP *p_app_location = NULL;    HASH_TAB    *p_relation_tab = &g_uplaod_policy_hashtab;    INT4  hash_index = 0;    hash_index   = FLW_SAV_username_type_hash(p_username,user_type,p_relation_tab->hsize);     //如果策略类型为上报，则加入上报哈希表    p_app_uc_map = ((UPLOAD_UC_MSGNO_MAP**)p_relation_tab->tab)[hash_index];            while(p_app_uc_map)    {        if((strncmp(p_app_uc_map->username, p_username,L_USERID) == 0)&&             (p_app_uc_map->msg_no == msg_no) &&   (p_app_uc_map->msg_type == msg_type)&&   (p_app_uc_map->uc_msg_no  == uc_msg_no)&&   (p_app_uc_map->user_type == user_type))        {            DebugOut(FLW_MOD_SAVE, LEVEL_INFO, "exist! msg_type:%d,msg_no:%d,uc_msg_no:%d\n",                msg_type, msg_no, uc_msg_no);            return SUCCESS;        }        p_app_uc_map = p_app_uc_map->pnext;    }        p_app_uc_map = (UPLOAD_UC_MSGNO_MAP*)GetMemFromPool(p_relation_tab->memid);    if(NULL == p_app_uc_map)    {        DebugOut(FLW_MOD_SAVE, LEVEL_ERR, " get mem from pool failure!\n");        return FAILURE;    }        memset(p_app_uc_map, 0x0, sizeof(UPLOAD_UC_MSGNO_MAP));    strncpy(p_app_uc_map->username, p_username, L_USERID);    p_app_uc_map->uc_msg_no    = uc_msg_no;    p_app_uc_map->msg_no       = msg_no;    p_app_uc_map->msg_type     = msg_type;    p_app_uc_map->user_type    = user_type;        p_app_location = ((UPLOAD_UC_MSGNO_MAP **)p_relation_tab->tab)[hash_index];    if(p_app_location)    {        p_app_uc_map->pnext = p_app_location;        p_app_location->prev  = p_app_uc_map;    }        ((UPLOAD_UC_MSGNO_MAP **)p_relation_tab->tab)[hash_index] = p_app_uc_map;        DebugOut(FLW_MOD_SAVE, LEVEL_INFO, "add new node! msg_type:%d,msg_no:%d,uc_msg_no:%d\n",                msg_type, msg_no, uc_msg_no);    return SUCCESS;}
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