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;
24 /* For futex_wait and futex_wait_requeue_pi */
36 struct timespec __user *rmtp;
38 struct compat_timespec __user *compat_rmtp;
44 struct pollfd __user *ufds;
48 unsigned long tv_nsec;
53 extern long do_no_restart_syscall(struct restart_block *parm);
55 #include <linux/bitops.h>
56 #include <asm/thread_info.h>
61 * flag set/clear/test wrappers
62 * - pass TIF_xxxx constants to these functions
65 static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
67 set_bit(flag, (unsigned long *)&ti->flags);
70 static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
72 clear_bit(flag, (unsigned long *)&ti->flags);
75 static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
77 return test_and_set_bit(flag, (unsigned long *)&ti->flags);
80 static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
82 return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
85 static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
87 return test_bit(flag, (unsigned long *)&ti->flags);
90 #define set_thread_flag(flag) \
91 set_ti_thread_flag(current_thread_info(), flag)
92 #define clear_thread_flag(flag) \
93 clear_ti_thread_flag(current_thread_info(), flag)
94 #define test_and_set_thread_flag(flag) \
95 test_and_set_ti_thread_flag(current_thread_info(), flag)
96 #define test_and_clear_thread_flag(flag) \
97 test_and_clear_ti_thread_flag(current_thread_info(), flag)
98 #define test_thread_flag(flag) \
99 test_ti_thread_flag(current_thread_info(), flag)
101 #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
102 #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
104 #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
106 * An arch can define its own version of set_restore_sigmask() to get the
107 * job done however works, with or without TIF_RESTORE_SIGMASK.
109 #define HAVE_SET_RESTORE_SIGMASK 1
112 * set_restore_sigmask() - make sure saved_sigmask processing gets done
114 * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
115 * will run before returning to user mode, to process the flag. For
116 * all callers, TIF_SIGPENDING is already set or it's no harm to set
117 * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the
118 * arch code will notice on return to user mode, in case those bits
119 * are scarce. We set TIF_SIGPENDING here to ensure that the arch
120 * signal code always gets run when TIF_RESTORE_SIGMASK is set.
122 static inline void set_restore_sigmask(void)
124 set_thread_flag(TIF_RESTORE_SIGMASK);
125 set_thread_flag(TIF_SIGPENDING);
127 #endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */
129 #endif /* __KERNEL__ */
131 #endif /* _LINUX_THREAD_INFO_H */