atomic.h 2.2 KB

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  1. #ifndef _ASM_GENERIC_ATOMIC_H
  2. #define _ASM_GENERIC_ATOMIC_H
  3. /*
  4. * Copyright (C) 2005 Silicon Graphics, Inc.
  5. * Christoph Lameter <clameter@sgi.com>
  6. *
  7. * Allows to provide arch independent atomic definitions without the need to
  8. * edit all arch specific atomic.h files.
  9. */
  10. #include <asm/types.h>
  11. /*
  12. * Suppport for atomic_long_t
  13. *
  14. * Casts for parameters are avoided for existing atomic functions in order to
  15. * avoid issues with cast-as-lval under gcc 4.x and other limitations that the
  16. * macros of a platform may have.
  17. */
  18. #if BITS_PER_LONG == 64
  19. typedef atomic64_t atomic_long_t;
  20. #define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i)
  21. static inline long atomic_long_read(atomic_long_t *l)
  22. {
  23. atomic64_t *v = (atomic64_t *)l;
  24. return (long)atomic64_read(v);
  25. }
  26. static inline void atomic_long_set(atomic_long_t *l, long i)
  27. {
  28. atomic64_t *v = (atomic64_t *)l;
  29. atomic64_set(v, i);
  30. }
  31. static inline void atomic_long_inc(atomic_long_t *l)
  32. {
  33. atomic64_t *v = (atomic64_t *)l;
  34. atomic64_inc(v);
  35. }
  36. static inline void atomic_long_dec(atomic_long_t *l)
  37. {
  38. atomic64_t *v = (atomic64_t *)l;
  39. atomic64_dec(v);
  40. }
  41. static inline void atomic_long_add(long i, atomic_long_t *l)
  42. {
  43. atomic64_t *v = (atomic64_t *)l;
  44. atomic64_add(i, v);
  45. }
  46. static inline void atomic_long_sub(long i, atomic_long_t *l)
  47. {
  48. atomic64_t *v = (atomic64_t *)l;
  49. atomic64_sub(i, v);
  50. }
  51. #else /* BITS_PER_LONG == 64 */
  52. typedef atomic_t atomic_long_t;
  53. #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i)
  54. static inline long atomic_long_read(atomic_long_t *l)
  55. {
  56. atomic_t *v = (atomic_t *)l;
  57. return (long)atomic_read(v);
  58. }
  59. static inline void atomic_long_set(atomic_long_t *l, long i)
  60. {
  61. atomic_t *v = (atomic_t *)l;
  62. atomic_set(v, i);
  63. }
  64. static inline void atomic_long_inc(atomic_long_t *l)
  65. {
  66. atomic_t *v = (atomic_t *)l;
  67. atomic_inc(v);
  68. }
  69. static inline void atomic_long_dec(atomic_long_t *l)
  70. {
  71. atomic_t *v = (atomic_t *)l;
  72. atomic_dec(v);
  73. }
  74. static inline void atomic_long_add(long i, atomic_long_t *l)
  75. {
  76. atomic_t *v = (atomic_t *)l;
  77. atomic_add(i, v);
  78. }
  79. static inline void atomic_long_sub(long i, atomic_long_t *l)
  80. {
  81. atomic_t *v = (atomic_t *)l;
  82. atomic_sub(i, v);
  83. }
  84. #endif /* BITS_PER_LONG == 64 */
  85. #endif /* _ASM_GENERIC_ATOMIC_H */