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;
43 struct pollfd __user *ufds;
47 unsigned long tv_nsec;
52 extern long do_no_restart_syscall(struct restart_block *parm);
54 #include <linux/bitops.h>
55 #include <asm/thread_info.h>
60 * flag set/clear/test wrappers
61 * - pass TIF_xxxx constants to these functions
64 static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
66 set_bit(flag, (unsigned long *)&ti->flags);
69 static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
71 clear_bit(flag, (unsigned long *)&ti->flags);
74 static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
76 return test_and_set_bit(flag, (unsigned long *)&ti->flags);
79 static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
81 return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
84 static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
86 return test_bit(flag, (unsigned long *)&ti->flags);
89 #define set_thread_flag(flag) \
90 set_ti_thread_flag(current_thread_info(), flag)
91 #define clear_thread_flag(flag) \
92 clear_ti_thread_flag(current_thread_info(), flag)
93 #define test_and_set_thread_flag(flag) \
94 test_and_set_ti_thread_flag(current_thread_info(), flag)
95 #define test_and_clear_thread_flag(flag) \
96 test_and_clear_ti_thread_flag(current_thread_info(), flag)
97 #define test_thread_flag(flag) \
98 test_ti_thread_flag(current_thread_info(), flag)
100 #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
101 #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
103 #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
105 * An arch can define its own version of set_restore_sigmask() to get the
106 * job done however works, with or without TIF_RESTORE_SIGMASK.
108 #define HAVE_SET_RESTORE_SIGMASK 1
111 * set_restore_sigmask() - make sure saved_sigmask processing gets done
113 * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
114 * will run before returning to user mode, to process the flag. For
115 * all callers, TIF_SIGPENDING is already set or it's no harm to set
116 * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the
117 * arch code will notice on return to user mode, in case those bits
118 * are scarce. We set TIF_SIGPENDING here to ensure that the arch
119 * signal code always gets run when TIF_RESTORE_SIGMASK is set.
121 static inline void set_restore_sigmask(void)
123 set_thread_flag(TIF_RESTORE_SIGMASK);
124 set_thread_flag(TIF_SIGPENDING);
126 #endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */
128 #endif /* __KERNEL__ */
130 #endif /* _LINUX_THREAD_INFO_H */