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thread_info.h

thread_info.h 1.9 KB
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  1. /* thread_info.h: common low-level thread information accessors
    2. 

  2.  *
    3. 

  3.  * Copyright (C) 2002  David Howells (dhowells@redhat.com)
    4. 

  4.  * - Incorporating suggestions made by Linus Torvalds
    5. 

  5.  */
    6. 

  6. 

  7. #ifndef _LINUX_THREAD_INFO_H
    8. 

  8. #define _LINUX_THREAD_INFO_H
    9. 

  9. 

  10. #include <linux/types.h>
    11. 

  11. 

  12. /*
    13. 

  13.  * System call restart block.
    14. 

  14.  */
    15. 

  15. struct restart_block {
    16. 

  16. 	long (*fn)(struct restart_block *);
    17. 

  17. 	union {
    18. 

  18. 		struct {
    19. 

  19. 			unsigned long arg0, arg1, arg2, arg3;
    20. 

  20. 		};
    21. 

  21. 		/* For futex_wait */
    22. 

  22. 		struct {
    23. 

  23. 			u32 *uaddr;
    24. 

  24. 			u32 val;
    25. 

  25. 			u32 flags;
    26. 

  26. 			u64 time;
    27. 

  27. 		} futex;
    28. 

  28. 	};
    29. 

  29. };
    30. 

  30. 

  31. extern long do_no_restart_syscall(struct restart_block *parm);
    32. 

  32. 

  33. #include <linux/bitops.h>
    34. 

  34. #include <asm/thread_info.h>
    35. 

  35. 

  36. #ifdef __KERNEL__
    37. 

  37. 

  38. /*
    39. 

  39.  * flag set/clear/test wrappers
    40. 

  40.  * - pass TIF_xxxx constants to these functions
    41. 

  41.  */
    42. 

  42. 

  43. static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
    44. 

  44. {
    45. 

  45. 	set_bit(flag,&ti->flags);
    46. 

  46. }
    47. 

  47. 

  48. static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
    49. 

  49. {
    50. 

  50. 	clear_bit(flag,&ti->flags);
    51. 

  51. }
    52. 

  52. 

  53. static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
    54. 

  54. {
    55. 

  55. 	return test_and_set_bit(flag,&ti->flags);
    56. 

  56. }
    57. 

  57. 

  58. static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
    59. 

  59. {
    60. 

  60. 	return test_and_clear_bit(flag,&ti->flags);
    61. 

  61. }
    62. 

  62. 

  63. static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
    64. 

  64. {
    65. 

  65. 	return test_bit(flag,&ti->flags);
    66. 

  66. }
    67. 

  67. 

  68. #define set_thread_flag(flag) \
    69. 

  69. 	set_ti_thread_flag(current_thread_info(), flag)
    70. 

  70. #define clear_thread_flag(flag) \
    71. 

  71. 	clear_ti_thread_flag(current_thread_info(), flag)
    72. 

  72. #define test_and_set_thread_flag(flag) \
    73. 

  73. 	test_and_set_ti_thread_flag(current_thread_info(), flag)
    74. 

  74. #define test_and_clear_thread_flag(flag) \
    75. 

  75. 	test_and_clear_ti_thread_flag(current_thread_info(), flag)
    76. 

  76. #define test_thread_flag(flag) \
    77. 

  77. 	test_ti_thread_flag(current_thread_info(), flag)
    78. 

  78. 

  79. #define set_need_resched()	set_thread_flag(TIF_NEED_RESCHED)
    80. 

  80. #define clear_need_resched()	clear_thread_flag(TIF_NEED_RESCHED)
    81. 

  81. 

  82. #endif
    83. 

  83. 

  84. #endif /* _LINUX_THREAD_INFO_H */
    85.