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 #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
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.
100 #define HAVE_SET_RESTORE_SIGMASK 1
103 * set_restore_sigmask() - make sure saved_sigmask processing gets done
105 * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
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.
113 static inline void set_restore_sigmask(void)
115 set_thread_flag(TIF_RESTORE_SIGMASK
);
116 set_thread_flag(TIF_SIGPENDING
);
118 #endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */
120 #endif /* __KERNEL__ */
122 #endif /* _LINUX_THREAD_INFO_H */