diff options
Diffstat (limited to 'drivers/usb/gadget/u_f.h')
| -rw-r--r-- | drivers/usb/gadget/u_f.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h index 71034c061fca..1d5f0eb68552 100644 --- a/drivers/usb/gadget/u_f.h +++ b/drivers/usb/gadget/u_f.h @@ -16,6 +16,32 @@ #ifndef __U_F_H__ #define __U_F_H__ +/* Variable Length Array Macros **********************************************/ +#define vla_group(groupname) size_t groupname##__next = 0 +#define vla_group_size(groupname) groupname##__next + +#define vla_item(groupname, type, name, n) \ + size_t groupname##_##name##__offset = ({ \ + size_t align_mask = __alignof__(type) - 1; \ + size_t offset = (groupname##__next + align_mask) & ~align_mask;\ + size_t size = (n) * sizeof(type); \ + groupname##__next = offset + size; \ + offset; \ + }) + +#define vla_item_with_sz(groupname, type, name, n) \ + size_t groupname##_##name##__sz = (n) * sizeof(type); \ + size_t groupname##_##name##__offset = ({ \ + size_t align_mask = __alignof__(type) - 1; \ + size_t offset = (groupname##__next + align_mask) & ~align_mask;\ + size_t size = groupname##_##name##__sz; \ + groupname##__next = offset + size; \ + offset; \ + }) + +#define vla_ptr(ptr, groupname, name) \ + ((void *) ((char *)ptr + groupname##_##name##__offset)) + struct usb_ep; struct usb_request; |