projects / linux-block.git / blame
| 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 | |
| 4e4c22c7 RM |
95 | #ifdef TIF_RESTORE_SIGMASK |
| 96 | /** | |
| 97 | * set_restore_sigmask() - make sure saved_sigmask processing gets done | |
| 98 | * | |
| 99 | * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code | |
| 7648d961 RM |
100 | * will run before returning to user mode, to process the flag. For |
| 101 | * all callers, TIF_SIGPENDING is already set or it's no harm to set | |
| 102 | * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the | |
| 103 | * arch code will notice on return to user mode, in case those bits | |
| 104 | * are scarce. We set TIF_SIGPENDING here to ensure that the arch | |
| 105 | * signal code always gets run when TIF_RESTORE_SIGMASK is set. | |
| 4e4c22c7 RM |
106 | */ |
| 107 | static inline void set_restore_sigmask(void) | |
| 108 | { | |
| 109 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
| 7648d961 | 110 | set_thread_flag(TIF_SIGPENDING); |
| 4e4c22c7 RM |
111 | } |
| 112 | #endif /* TIF_RESTORE_SIGMASK */ | |
| 113 | ||
| 114 | #endif /* __KERNEL__ */ | |
| 1da177e4 LT |
115 | |
| 116 | #endif /* _LINUX_THREAD_INFO_H */ |