/tools/Ruby/lib/ruby/1.8/i386-mingw32/rubysig.h

http://github.com/agross/netopenspace · C Header · 105 lines · 80 code · 12 blank · 13 comment · 17 complexity · 41f0a57076c4562e3b265db39b29aa3e MD5 · raw file

  1. /**********************************************************************
  2. rubysig.h -
  3. $Author: shyouhei $
  4. $Date: 2009-01-05 11:16:18 +0900 (Mon, 05 Jan 2009) $
  5. created at: Wed Aug 16 01:15:38 JST 1995
  6. Copyright (C) 1993-2003 Yukihiro Matsumoto
  7. **********************************************************************/
  8. #ifndef SIG_H
  9. #define SIG_H
  10. #include <errno.h>
  11. #ifdef _WIN32
  12. typedef LONG rb_atomic_t;
  13. # define ATOMIC_TEST(var) InterlockedExchange(&(var), 0)
  14. # define ATOMIC_SET(var, val) InterlockedExchange(&(var), (val))
  15. # define ATOMIC_INC(var) InterlockedIncrement(&(var))
  16. # define ATOMIC_DEC(var) InterlockedDecrement(&(var))
  17. /* Windows doesn't allow interrupt while system calls */
  18. # define TRAP_BEG do {\
  19. int saved_errno = 0;\
  20. rb_atomic_t trap_immediate = ATOMIC_SET(rb_trap_immediate, 1)
  21. # define TRAP_END\
  22. ATOMIC_SET(rb_trap_immediate, trap_immediate);\
  23. saved_errno = errno;\
  24. CHECK_INTS;\
  25. errno = saved_errno;\
  26. } while (0)
  27. # define RUBY_CRITICAL(statements) do {\
  28. rb_w32_enter_critical();\
  29. statements;\
  30. rb_w32_leave_critical();\
  31. } while (0)
  32. #else
  33. typedef int rb_atomic_t;
  34. # define ATOMIC_TEST(var) ((var) ? ((var) = 0, 1) : 0)
  35. # define ATOMIC_SET(var, val) ((var) = (val))
  36. # define ATOMIC_INC(var) (++(var))
  37. # define ATOMIC_DEC(var) (--(var))
  38. # define TRAP_BEG do {\
  39. int saved_errno = 0;\
  40. int trap_immediate = rb_trap_immediate;\
  41. rb_trap_immediate = 1
  42. # define TRAP_END rb_trap_immediate = trap_immediate;\
  43. saved_errno = errno;\
  44. CHECK_INTS;\
  45. errno = saved_errno;\
  46. } while (0)
  47. # define RUBY_CRITICAL(statements) do {\
  48. int trap_immediate = rb_trap_immediate;\
  49. rb_trap_immediate = 0;\
  50. statements;\
  51. rb_trap_immediate = trap_immediate;\
  52. } while (0)
  53. #endif
  54. RUBY_EXTERN rb_atomic_t rb_trap_immediate;
  55. RUBY_EXTERN int rb_prohibit_interrupt;
  56. #define DEFER_INTS (rb_prohibit_interrupt++)
  57. #define ALLOW_INTS do {\
  58. rb_prohibit_interrupt--;\
  59. CHECK_INTS;\
  60. } while (0)
  61. #define ENABLE_INTS (rb_prohibit_interrupt--)
  62. VALUE rb_with_disable_interrupt _((VALUE(*)(ANYARGS),VALUE));
  63. RUBY_EXTERN rb_atomic_t rb_trap_pending;
  64. void rb_trap_restore_mask _((void));
  65. RUBY_EXTERN int rb_thread_critical;
  66. RUBY_EXTERN int rb_thread_pending;
  67. void rb_thread_schedule _((void));
  68. #if defined(HAVE_SETITIMER) || defined(_THREAD_SAFE)
  69. # define CHECK_INTS do {\
  70. if (!(rb_prohibit_interrupt || rb_thread_critical)) {\
  71. if (rb_thread_pending) rb_thread_schedule();\
  72. if (rb_trap_pending) rb_trap_exec();\
  73. }\
  74. } while (0)
  75. #else
  76. /* pseudo preemptive thread switching */
  77. RUBY_EXTERN int rb_thread_tick;
  78. #define THREAD_TICK 500
  79. #define CHECK_INTS do {\
  80. if (!(rb_prohibit_interrupt || rb_thread_critical)) {\
  81. if (rb_thread_pending || rb_thread_tick-- <= 0) {\
  82. rb_thread_tick = THREAD_TICK;\
  83. rb_thread_schedule();\
  84. }\
  85. }\
  86. if (rb_trap_pending) rb_trap_exec();\
  87. } while (0)
  88. #endif
  89. #endif