/usr/lib/ruby/vendor_ruby/concurrent/atomic_reference/numeric_cas_wrapper.rb is in ruby-concurrent 1.0.0-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | module Concurrent
# Special "compare and set" handling of numeric values.
#
# @!visibility private
# @!macro internal_implementation_note
module AtomicNumericCompareAndSetWrapper
# @!macro atomic_reference_method_compare_and_set
def compare_and_set(old_value, new_value)
if old_value.kind_of? Numeric
while true
old = get
return false unless old.kind_of? Numeric
return false unless old == old_value
result = _compare_and_set(old, new_value)
return result if result
end
else
_compare_and_set(old_value, new_value)
end
end
alias_method :compare_and_swap, :compare_and_set
end
end
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