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1/* thread_info.h: common low-level thread information accessors
2 *
3 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
4 * - Incorporating suggestions made by Linus Torvalds
5 */
6
7#ifndef _LINUX_THREAD_INFO_H
8#define _LINUX_THREAD_INFO_H
9
10#include <linux/types.h>
11
12/*
13 * System call restart block.
14 */
15struct restart_block {
16 long (*fn)(struct restart_block *);
17 union {
18 struct {
19 unsigned long arg0, arg1, arg2, arg3;
20 };
21 /* For futex_wait */
22 struct {
23 u32 *uaddr;
24 u32 val;
25 u32 flags;
26 u32 bitset;
27 u64 time;
28 } futex;
29 };
30};
31
32extern long do_no_restart_syscall(struct restart_block *parm);
33
34#include <linux/bitops.h>
35#include <asm/thread_info.h>
36
37#ifdef __KERNEL__
38
39/*
40 * flag set/clear/test wrappers
41 * - pass TIF_xxxx constants to these functions
42 */
43
44static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
45{
46 set_bit(flag, (unsigned long *)&ti->flags);
47}
48
49static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
50{
51 clear_bit(flag, (unsigned long *)&ti->flags);
52}
53
54static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
55{
56 return test_and_set_bit(flag, (unsigned long *)&ti->flags);
57}
58
59static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
60{
61 return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
62}
63
64static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
65{
66 return test_bit(flag, (unsigned long *)&ti->flags);
67}
68
69#define set_thread_flag(flag) \
70 set_ti_thread_flag(current_thread_info(), flag)
71#define clear_thread_flag(flag) \
72 clear_ti_thread_flag(current_thread_info(), flag)
73#define test_and_set_thread_flag(flag) \
74 test_and_set_ti_thread_flag(current_thread_info(), flag)
75#define test_and_clear_thread_flag(flag) \
76 test_and_clear_ti_thread_flag(current_thread_info(), flag)
77#define test_thread_flag(flag) \
78 test_ti_thread_flag(current_thread_info(), flag)
79
80#define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
81#define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
82
83#endif
84
85#endif /* _LINUX_THREAD_INFO_H */