Class: Concurrent::CAtomicFixnum

Inherits:
Object
  • Object
show all
Defined in:
ext/concurrent/rb_concurrent.c

Constant Summary collapse

MIN_VALUE =

CAtomicFixnum

LL2NUM(LLONG_MIN)
MAX_VALUE = 
LL2NUM(LLONG_MAX)

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Object 



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# File 'ext/concurrent/atomic_fixnum.c', line 15

VALUE method_atomic_fixnum_initialize(int argc, VALUE* argv, VALUE self) {
  VALUE value = LL2NUM(0);
  rb_check_arity(argc, 0, 1);
  if (argc == 1) {
    Check_Type(argv[0], T_FIXNUM);
    value = argv[0];
  }
  DATA_PTR(self) = (void *) value;
  return(self);
}

Instance Method Details

#compare_and_set(rb_expect, rb_update) ⇒ Object 



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# File 'ext/concurrent/atomic_fixnum.c', line 58

VALUE method_atomic_fixnum_compare_and_set(VALUE self, VALUE rb_expect, VALUE rb_update) {
  Check_Type(rb_expect, T_FIXNUM);
  Check_Type(rb_update, T_FIXNUM);
  return ir_compare_and_set(self, rb_expect, rb_update);
}

#decrement(*args) ⇒ Object Also known as: down 



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# File 'ext/concurrent/atomic_fixnum.c', line 47

VALUE method_atomic_fixnum_decrement(int argc, VALUE* argv, VALUE self) {
  long long value = NUM2LL((VALUE) DATA_PTR(self));
  long long delta = 1;
  rb_check_arity(argc, 0, 1);
  if (argc == 1) {
    Check_Type(argv[0], T_FIXNUM);
    delta = NUM2LL(argv[0]);
  }
  return method_atomic_fixnum_value_set(self, LL2NUM(value - delta));
}

#increment(*args) ⇒ Object Also known as: up 



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# File 'ext/concurrent/atomic_fixnum.c', line 36

VALUE method_atomic_fixnum_increment(int argc, VALUE* argv, VALUE self) {
  long long value = NUM2LL((VALUE) DATA_PTR(self));
  long long delta = 1;
  rb_check_arity(argc, 0, 1);
  if (argc == 1) {
    Check_Type(argv[0], T_FIXNUM);
    delta = NUM2LL(argv[0]);
  }
  return method_atomic_fixnum_value_set(self, LL2NUM(value + delta));
}

#update ⇒ Object 



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# File 'ext/concurrent/atomic_fixnum.c', line 64

VALUE method_atomic_fixnum_update(VALUE self) {
  VALUE old_value, new_value;
  for (;;) {
    old_value = method_atomic_fixnum_value(self);
    new_value = rb_yield(old_value);
    if (ir_compare_and_set(self, old_value, new_value) == Qtrue) {
      return new_value;
    }
  }
}

#value ⇒ Object 



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# File 'ext/concurrent/atomic_fixnum.c', line 26

VALUE method_atomic_fixnum_value(VALUE self) {
  return (VALUE) DATA_PTR(self);
}

#value=(value) ⇒ Object 



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# File 'ext/concurrent/atomic_fixnum.c', line 30

VALUE method_atomic_fixnum_value_set(VALUE self, VALUE value) {
  Check_Type(value, T_FIXNUM);
  DATA_PTR(self) = (void *) value;
  return(value);
}