1 /* thread_info.h: common low-level thread information accessors
3 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
4 * - Incorporating suggestions made by Linus Torvalds
7 #ifndef _LINUX_THREAD_INFO_H
8 #define _LINUX_THREAD_INFO_H
10 #include <linux/types.h>
13 struct compat_timespec;
16 * System call restart block.
18 struct restart_block {
19 long (*fn)(struct restart_block *);
22 unsigned long arg0, arg1, arg2, arg3;
35 struct timespec __user *rmtp;
37 struct compat_timespec __user *compat_rmtp;
44 extern long do_no_restart_syscall(struct restart_block *parm);
46 #include <linux/bitops.h>
47 #include <asm/thread_info.h>
52 * flag set/clear/test wrappers
53 * - pass TIF_xxxx constants to these functions
56 static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
58 set_bit(flag, (unsigned long *)&ti->flags);
61 static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
63 clear_bit(flag, (unsigned long *)&ti->flags);
66 static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
68 return test_and_set_bit(flag, (unsigned long *)&ti->flags);
71 static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
73 return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
76 static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
78 return test_bit(flag, (unsigned long *)&ti->flags);
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)
92 #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
93 #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
95 #ifdef TIF_RESTORE_SIGMASK
97 * set_restore_sigmask() - make sure saved_sigmask processing gets done
99 * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
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.
107 static inline void set_restore_sigmask(void)
109 set_thread_flag(TIF_RESTORE_SIGMASK);
110 set_thread_flag(TIF_SIGPENDING);
112 #endif /* TIF_RESTORE_SIGMASK */
114 #endif /* __KERNEL__ */
116 #endif /* _LINUX_THREAD_INFO_H */