1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ***   To edit the content of this header, modify the corresponding
11 ***   source file (e.g. under external/kernel-headers/original/) then
12 ***   run bionic/libc/kernel/tools/update_all.py
13 ***
14 ***   Any manual change here will be lost the next time this script will
15 ***   be run. You've been warned!
16 ***
17 ****************************************************************************
18 ****************************************************************************/
19#ifndef _LINUX_CIRC_BUF_H
20#define _LINUX_CIRC_BUF_H 1
21struct circ_buf {
22 char *buf;
23/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
24 int head;
25 int tail;
26};
27#define CIRC_CNT(head,tail,size) (((head) - (tail)) & ((size)-1))
28/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
29#define CIRC_SPACE(head,tail,size) CIRC_CNT((tail),((head)+1),(size))
30#define CIRC_CNT_TO_END(head,tail,size)   ({int end = (size) - (tail);   int n = ((head) + end) & ((size)-1);   n < end ? n : end;})
31#define CIRC_SPACE_TO_END(head,tail,size)   ({int end = (size) - 1 - (head);   int n = (end + (tail)) & ((size)-1);   n <= end ? n : end+1;})
32#endif
33/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
34