1 /* 2 * u_f.h 3 * 4 * Utility definitions for USB functions 5 * 6 * Copyright (c) 2013 Samsung Electronics Co., Ltd. 7 * http://www.samsung.com 8 * 9 * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #ifndef __U_F_H__ 17 #define __U_F_H__ 18 19 /* Variable Length Array Macros **********************************************/ 20 #define vla_group(groupname) size_t groupname##__next = 0 21 #define vla_group_size(groupname) groupname##__next 22 23 #define vla_item(groupname, type, name, n) \ 24 size_t groupname##_##name##__offset = ({ \ 25 size_t align_mask = __alignof__(type) - 1; \ 26 size_t offset = (groupname##__next + align_mask) & ~align_mask;\ 27 size_t size = (n) * sizeof(type); \ 28 groupname##__next = offset + size; \ 29 offset; \ 30 }) 31 32 #define vla_item_with_sz(groupname, type, name, n) \ 33 size_t groupname##_##name##__sz = (n) * sizeof(type); \ 34 size_t groupname##_##name##__offset = ({ \ 35 size_t align_mask = __alignof__(type) - 1; \ 36 size_t offset = (groupname##__next + align_mask) & ~align_mask;\ 37 size_t size = groupname##_##name##__sz; \ 38 groupname##__next = offset + size; \ 39 offset; \ 40 }) 41 42 #define vla_ptr(ptr, groupname, name) \ 43 ((void *) ((char *)ptr + groupname##_##name##__offset)) 44 45 struct usb_ep; 46 struct usb_request; 47 48 struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len); 49 50 #endif /* __U_F_H__ */ 51 52 53