| | 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 | struct timespec; |
| | 13 | struct compat_timespec; |
| | 14 | |
| | 15 | /* |
| | 16 | * System call restart block. |
| | 17 | */ |
| | 18 | struct restart_block { |
| | 19 | long (*fn)(struct restart_block *); |
| | 20 | union { |
| | 21 | /* For futex_wait and futex_wait_requeue_pi */ |
| | 22 | struct { |
| | 23 | u32 __user *uaddr; |
| | 24 | u32 val; |
| | 25 | u32 flags; |
| | 26 | u32 bitset; |
| | 27 | u64 time; |
| | 28 | u32 __user *uaddr2; |
| | 29 | } futex; |
| | 30 | /* For nanosleep */ |
| | 31 | struct { |
| | 32 | clockid_t index; |
| | 33 | struct timespec __user *rmtp; |
| | 34 | #ifdef CONFIG_COMPAT |
| | 35 | struct compat_timespec __user *compat_rmtp; |
| | 36 | #endif |
| | 37 | u64 expires; |
| | 38 | } nanosleep; |
| | 39 | /* For poll */ |
| | 40 | struct { |
| | 41 | struct pollfd __user *ufds; |
| | 42 | int nfds; |
| | 43 | int has_timeout; |
| | 44 | unsigned long tv_sec; |
| | 45 | unsigned long tv_nsec; |
| | 46 | } poll; |
| | 47 | }; |
| | 48 | }; |
| | 49 | |
| | 50 | extern long do_no_restart_syscall(struct restart_block *parm); |
| | 51 | |
| | 52 | #include <linux/bitops.h> |
| | 53 | #include <asm/thread_info.h> |
| | 54 | |
| | 55 | #ifdef __KERNEL__ |
| | 56 | |
| | 57 | /* |
| | 58 | * flag set/clear/test wrappers |
| | 59 | * - pass TIF_xxxx constants to these functions |
| | 60 | */ |
| | 61 | |
| | 62 | static inline void set_ti_thread_flag(struct thread_info *ti, int flag) |
| | 63 | { |
| | 64 | set_bit(flag, (unsigned long *)&ti->flags); |
| | 65 | } |
| | 66 | |
| | 67 | static inline void clear_ti_thread_flag(struct thread_info *ti, int flag) |
| | 68 | { |
| | 69 | clear_bit(flag, (unsigned long *)&ti->flags); |
| | 70 | } |
| | 71 | |
| | 72 | static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag) |
| | 73 | { |
| | 74 | return test_and_set_bit(flag, (unsigned long *)&ti->flags); |
| | 75 | } |
| | 76 | |
| | 77 | static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag) |
| | 78 | { |
| | 79 | return test_and_clear_bit(flag, (unsigned long *)&ti->flags); |
| | 80 | } |
| | 81 | |
| | 82 | static inline int test_ti_thread_flag(struct thread_info *ti, int flag) |
| | 83 | { |
| | 84 | return test_bit(flag, (unsigned long *)&ti->flags); |
| | 85 | } |
| | 86 | |
| | 87 | #define set_thread_flag(flag) \ |
| | 88 | set_ti_thread_flag(current_thread_info(), flag) |
| | 89 | #define clear_thread_flag(flag) \ |
| | 90 | clear_ti_thread_flag(current_thread_info(), flag) |
| | 91 | #define test_and_set_thread_flag(flag) \ |
| | 92 | test_and_set_ti_thread_flag(current_thread_info(), flag) |
| | 93 | #define test_and_clear_thread_flag(flag) \ |
| | 94 | test_and_clear_ti_thread_flag(current_thread_info(), flag) |
| | 95 | #define test_thread_flag(flag) \ |
| | 96 | test_ti_thread_flag(current_thread_info(), flag) |
| | 97 | |
| | 98 | #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED) |
| | 99 | #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED) |
| | 100 | |
| | 101 | #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK |
| | 102 | /* |
| | 103 | * An arch can define its own version of set_restore_sigmask() to get the |
| | 104 | * job done however works, with or without TIF_RESTORE_SIGMASK. |
| | 105 | */ |
| | 106 | #define HAVE_SET_RESTORE_SIGMASK 1 |
| | 107 | |
| | 108 | /** |
| | 109 | * set_restore_sigmask() - make sure saved_sigmask processing gets done |
| | 110 | * |
| | 111 | * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code |
| | 112 | * will run before returning to user mode, to process the flag. For |
| | 113 | * all callers, TIF_SIGPENDING is already set or it's no harm to set |
| | 114 | * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the |
| | 115 | * arch code will notice on return to user mode, in case those bits |
| | 116 | * are scarce. We set TIF_SIGPENDING here to ensure that the arch |
| | 117 | * signal code always gets run when TIF_RESTORE_SIGMASK is set. |
| | 118 | */ |
| | 119 | static inline void set_restore_sigmask(void) |
| | 120 | { |
| | 121 | set_thread_flag(TIF_RESTORE_SIGMASK); |
| | 122 | set_thread_flag(TIF_SIGPENDING); |
| | 123 | } |
| | 124 | #endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */ |
| | 125 | |
| | 126 | #endif /* __KERNEL__ */ |
| | 127 | |
| | 128 | #endif /* _LINUX_THREAD_INFO_H */ |
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