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 /*
11 * System call restart block.
12 */
13 struct restart_block {
14 long (*fn)(struct restart_block *);
15 unsigned long arg0, arg1, arg2, arg3;
16 };
17
18 extern long do_no_restart_syscall(struct restart_block *parm);
19
20 #include <linux/bitops.h>
21 #include <asm/thread_info.h>
22
23 #ifdef __KERNEL__
24
25 /*
26 * flag set/clear/test wrappers
27 * - pass TIF_xxxx constants to these functions
28 */
29
set_ti_thread_flag(struct thread_info * ti,int flag)30 static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
31 {
32 set_bit(flag,&ti->flags);
33 }
34
clear_ti_thread_flag(struct thread_info * ti,int flag)35 static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
36 {
37 clear_bit(flag,&ti->flags);
38 }
39
test_and_set_ti_thread_flag(struct thread_info * ti,int flag)40 static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
41 {
42 return test_and_set_bit(flag,&ti->flags);
43 }
44
test_and_clear_ti_thread_flag(struct thread_info * ti,int flag)45 static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
46 {
47 return test_and_clear_bit(flag,&ti->flags);
48 }
49
test_ti_thread_flag(struct thread_info * ti,int flag)50 static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
51 {
52 return test_bit(flag,&ti->flags);
53 }
54
55 #define set_thread_flag(flag) \
56 set_ti_thread_flag(current_thread_info(), flag)
57 #define clear_thread_flag(flag) \
58 clear_ti_thread_flag(current_thread_info(), flag)
59 #define test_and_set_thread_flag(flag) \
60 test_and_set_ti_thread_flag(current_thread_info(), flag)
61 #define test_and_clear_thread_flag(flag) \
62 test_and_clear_ti_thread_flag(current_thread_info(), flag)
63 #define test_thread_flag(flag) \
64 test_ti_thread_flag(current_thread_info(), flag)
65
66 #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
67 #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
68
69 #endif
70
71 #endif /* _LINUX_THREAD_INFO_H */
72