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 /*
  11  * System call restart block.
  12  */
  13 struct restart_block {
  14         long (*fn)(struct restart_block *);
  15         unsigned long arg0, arg1, arg2, arg3;
  16 };
  17
  18 extern long do_no_restart_syscall(struct restart_block *parm);
  19
  20 #include <linux/bitops.h>
  21 #include <asm/thread_info.h>
  22
  23 #ifdef __KERNEL__
  24
  25 /*
  26  * flag set/clear/test wrappers
  27  * - pass TIF_xxxx constants to these functions
  28  */
  29
  30 static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
  31 {
  32         set_bit(flag,&ti->flags);
  33 }
  34
  35 static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
  36 {
  37         clear_bit(flag,&ti->flags);
  38 }
  39
  40 static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
  41 {
  42         return test_and_set_bit(flag,&ti->flags);
  43 }
  44
  45 static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
  46 {
  47         return test_and_clear_bit(flag,&ti->flags);
  48 }
  49
  50 static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
  51 {
  52         return test_bit(flag,&ti->flags);
  53 }
  54
  55 #define set_thread_flag(flag) \
  56         set_ti_thread_flag(current_thread_info(), flag)
  57 #define clear_thread_flag(flag) \
  58         clear_ti_thread_flag(current_thread_info(), flag)
  59 #define test_and_set_thread_flag(flag) \
  60         test_and_set_ti_thread_flag(current_thread_info(), flag)
  61 #define test_and_clear_thread_flag(flag) \
  62         test_and_clear_ti_thread_flag(current_thread_info(), flag)
  63 #define test_thread_flag(flag) \
  64         test_ti_thread_flag(current_thread_info(), flag)
  65
  66 #define set_need_resched()      set_thread_flag(TIF_NEED_RESCHED)
  67 #define clear_need_resched()    clear_thread_flag(TIF_NEED_RESCHED)
  68
  69 #endif
  70
  71 #endif /* _LINUX_THREAD_INFO_H */