include/linux/thread_info.h

   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 /*
  13  * System call restart block.
  14  */
  15 struct restart_block {
  16         long (*fn)(struct restart_block *);
  17         union {
  18                 struct {
  19                         unsigned long arg0, arg1, arg2, arg3;
  20                 };
  21                 /* For futex_wait */
  22                 struct {
  23                         u32 *uaddr;
  24                         u32 val;
  25                         u32 flags;
  26                         u32 bitset;
  27                         u64 time;
  28                 } futex;
  29         };
  30 };
  31
  32 extern long do_no_restart_syscall(struct restart_block *parm);
  33
  34 #include <linux/bitops.h>
  35 #include <asm/thread_info.h>
  36
  37 #ifdef __KERNEL__
  38
  39 /*
  40  * flag set/clear/test wrappers
  41  * - pass TIF_xxxx constants to these functions
  42  */
  43
  44 static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
  45 {
  46         set_bit(flag, (unsigned long *)&ti->flags);
  47 }
  48
  49 static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
  50 {
  51         clear_bit(flag, (unsigned long *)&ti->flags);
  52 }
  53
  54 static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
  55 {
  56         return test_and_set_bit(flag, (unsigned long *)&ti->flags);
  57 }
  58
  59 static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
  60 {
  61         return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
  62 }
  63
  64 static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
  65 {
  66         return test_bit(flag, (unsigned long *)&ti->flags);
  67 }
  68
  69 #define set_thread_flag(flag) \
  70         set_ti_thread_flag(current_thread_info(), flag)
  71 #define clear_thread_flag(flag) \
  72         clear_ti_thread_flag(current_thread_info(), flag)
  73 #define test_and_set_thread_flag(flag) \
  74         test_and_set_ti_thread_flag(current_thread_info(), flag)
  75 #define test_and_clear_thread_flag(flag) \
  76         test_and_clear_ti_thread_flag(current_thread_info(), flag)
  77 #define test_thread_flag(flag) \
  78         test_ti_thread_flag(current_thread_info(), flag)
  79
  80 #define set_need_resched()      set_thread_flag(TIF_NEED_RESCHED)
  81 #define clear_need_resched()    clear_thread_flag(TIF_NEED_RESCHED)
  82
  83 #endif
  84
  85 #endif /* _LINUX_THREAD_INFO_H */