atomic.h 4.1 KB

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  1. /* Copyright (C) 2003 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #include <stdint.h>
  16. #include <ia64intrin.h>
  17. typedef int8_t atomic8_t;
  18. typedef uint8_t uatomic8_t;
  19. typedef int_fast8_t atomic_fast8_t;
  20. typedef uint_fast8_t uatomic_fast8_t;
  21. typedef int16_t atomic16_t;
  22. typedef uint16_t uatomic16_t;
  23. typedef int_fast16_t atomic_fast16_t;
  24. typedef uint_fast16_t uatomic_fast16_t;
  25. typedef int32_t atomic32_t;
  26. typedef uint32_t uatomic32_t;
  27. typedef int_fast32_t atomic_fast32_t;
  28. typedef uint_fast32_t uatomic_fast32_t;
  29. typedef int64_t atomic64_t;
  30. typedef uint64_t uatomic64_t;
  31. typedef int_fast64_t atomic_fast64_t;
  32. typedef uint_fast64_t uatomic_fast64_t;
  33. typedef intptr_t atomicptr_t;
  34. typedef uintptr_t uatomicptr_t;
  35. typedef intmax_t atomic_max_t;
  36. typedef uintmax_t uatomic_max_t;
  37. #define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
  38. (abort (), 0)
  39. #define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
  40. (abort (), 0)
  41. #define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
  42. (!__sync_bool_compare_and_swap ((mem), (int) (long) (oldval), \
  43. (int) (long) (newval)))
  44. #define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
  45. (!__sync_bool_compare_and_swap ((mem), (long) (oldval), \
  46. (long) (newval)))
  47. #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
  48. (abort (), (__typeof (*mem)) 0)
  49. #define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
  50. (abort (), (__typeof (*mem)) 0)
  51. #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
  52. __sync_val_compare_and_swap ((mem), (int) (long) (oldval), \
  53. (int) (long) (newval))
  54. #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
  55. __sync_val_compare_and_swap ((mem), (long) (oldval), (long) (newval))
  56. /* Atomically store newval and return the old value. */
  57. #define atomic_exchange_acq(mem, value) \
  58. __sync_lock_test_and_set (mem, value)
  59. #define atomic_exchange_rel(mem, value) \
  60. (__sync_synchronize (), __sync_lock_test_and_set (mem, value))
  61. #define atomic_exchange_and_add(mem, value) \
  62. ({ __typeof (*mem) __result; \
  63. __result = __sync_fetch_and_add ((mem), (int) (value)); \
  64. __result; })
  65. #define atomic_decrement_if_positive(mem) \
  66. ({ __typeof (*mem) __oldval, __val; \
  67. __typeof (mem) __memp = (mem); \
  68. \
  69. __val = (*__memp); \
  70. do \
  71. { \
  72. __oldval = __val; \
  73. if (__builtin_expect (__val <= 0, 0)) \
  74. break; \
  75. __val = atomic_compare_and_exchange_val_acq (__memp, __oldval - 1, \
  76. __oldval); \
  77. } \
  78. while (__builtin_expect (__val != __oldval, 0)); \
  79. __oldval; })
  80. #define atomic_bit_test_set(mem, bit) \
  81. ({ __typeof (*mem) __oldval, __val; \
  82. __typeof (mem) __memp = (mem); \
  83. __typeof (*mem) __mask = ((__typeof (*mem)) 1 << (bit)); \
  84. \
  85. __val = (*__memp); \
  86. do \
  87. { \
  88. __oldval = __val; \
  89. __val = atomic_compare_and_exchange_val_acq (__memp, \
  90. __oldval | __mask, \
  91. __oldval); \
  92. } \
  93. while (__builtin_expect (__val != __oldval, 0)); \
  94. __oldval & __mask; })
  95. #define atomic_full_barrier() __sync_synchronize ()