Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
ce6bd420 SR |
10 | #include <linux/types.h> |
11 | ||
a332d86d TG |
12 | struct timespec; |
13 | struct compat_timespec; | |
14 | ||
1da177e4 | 15 | /* |
ce6bd420 | 16 | * System call restart block. |
1da177e4 LT |
17 | */ |
18 | struct restart_block { | |
19 | long (*fn)(struct restart_block *); | |
ce6bd420 SR |
20 | union { |
21 | struct { | |
22 | unsigned long arg0, arg1, arg2, arg3; | |
23 | }; | |
24 | /* For futex_wait */ | |
25 | struct { | |
26 | u32 *uaddr; | |
27 | u32 val; | |
28 | u32 flags; | |
cd689985 | 29 | u32 bitset; |
ce6bd420 SR |
30 | u64 time; |
31 | } futex; | |
a332d86d TG |
32 | /* For nanosleep */ |
33 | struct { | |
34 | clockid_t index; | |
35 | struct timespec __user *rmtp; | |
36 | #ifdef CONFIG_COMPAT | |
37 | struct compat_timespec __user *compat_rmtp; | |
38 | #endif | |
39 | u64 expires; | |
40 | } nanosleep; | |
ce6bd420 | 41 | }; |
1da177e4 LT |
42 | }; |
43 | ||
44 | extern long do_no_restart_syscall(struct restart_block *parm); | |
45 | ||
46 | #include <linux/bitops.h> | |
47 | #include <asm/thread_info.h> | |
48 | ||
49 | #ifdef __KERNEL__ | |
50 | ||
51 | /* | |
52 | * flag set/clear/test wrappers | |
53 | * - pass TIF_xxxx constants to these functions | |
54 | */ | |
55 | ||
1da177e4 LT |
56 | static inline void set_ti_thread_flag(struct thread_info *ti, int flag) |
57 | { | |
5548fecd | 58 | set_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
59 | } |
60 | ||
61 | static inline void clear_ti_thread_flag(struct thread_info *ti, int flag) | |
62 | { | |
5548fecd | 63 | clear_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
64 | } |
65 | ||
66 | static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag) | |
67 | { | |
5548fecd | 68 | return test_and_set_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
69 | } |
70 | ||
71 | static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag) | |
72 | { | |
5548fecd | 73 | return test_and_clear_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
74 | } |
75 | ||
76 | static inline int test_ti_thread_flag(struct thread_info *ti, int flag) | |
77 | { | |
5548fecd | 78 | return test_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
79 | } |
80 | ||
3b66a1ed RZ |
81 | #define set_thread_flag(flag) \ |
82 | set_ti_thread_flag(current_thread_info(), flag) | |
83 | #define clear_thread_flag(flag) \ | |
84 | clear_ti_thread_flag(current_thread_info(), flag) | |
85 | #define test_and_set_thread_flag(flag) \ | |
86 | test_and_set_ti_thread_flag(current_thread_info(), flag) | |
87 | #define test_and_clear_thread_flag(flag) \ | |
88 | test_and_clear_ti_thread_flag(current_thread_info(), flag) | |
89 | #define test_thread_flag(flag) \ | |
90 | test_ti_thread_flag(current_thread_info(), flag) | |
91 | ||
92 | #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED) | |
93 | #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED) | |
1da177e4 | 94 | |
f3de272b RM |
95 | #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK |
96 | /* | |
97 | * An arch can define its own version of set_restore_sigmask() to get the | |
98 | * job done however works, with or without TIF_RESTORE_SIGMASK. | |
99 | */ | |
100 | #define HAVE_SET_RESTORE_SIGMASK 1 | |
101 | ||
4e4c22c7 RM |
102 | /** |
103 | * set_restore_sigmask() - make sure saved_sigmask processing gets done | |
104 | * | |
105 | * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code | |
7648d961 RM |
106 | * will run before returning to user mode, to process the flag. For |
107 | * all callers, TIF_SIGPENDING is already set or it's no harm to set | |
108 | * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the | |
109 | * arch code will notice on return to user mode, in case those bits | |
110 | * are scarce. We set TIF_SIGPENDING here to ensure that the arch | |
111 | * signal code always gets run when TIF_RESTORE_SIGMASK is set. | |
4e4c22c7 RM |
112 | */ |
113 | static inline void set_restore_sigmask(void) | |
114 | { | |
115 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
7648d961 | 116 | set_thread_flag(TIF_SIGPENDING); |
4e4c22c7 | 117 | } |
f3de272b | 118 | #endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */ |
4e4c22c7 RM |
119 | |
120 | #endif /* __KERNEL__ */ | |
1da177e4 LT |
121 | |
122 | #endif /* _LINUX_THREAD_INFO_H */ |