Class: ThreadSafe::Util::PowerOfTwoTuple

Inherits:

VolatileTuple

• Object
• VolatileTuple
• ThreadSafe::Util::PowerOfTwoTuple

show all

Defined in:

lib/thread_safe/util/power_of_two_tuple.rb

Constant Summary

Instance Method Summary (collapse)

• - (Object) hash_to_index(hash)
• - (PowerOfTwoTuple) initialize(size) constructor

  A new instance of PowerOfTwoTuple.

• - (Object) next_in_size_table
• - (Object) volatile_get_by_hash(hash)
• - (Object) volatile_set_by_hash(hash, value)

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# File 'lib/thread_safe/util/power_of_two_tuple.rb', line 4

def initialize(size)
  raise ArgumentError, "size must be a power of 2 (#{size.inspect} provided)" unless size > 0 && size & (size - 1) == 0
  super(size)
end

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# File 'lib/thread_safe/util/power_of_two_tuple.rb', line 9

def hash_to_index(hash)
  (size - 1) & hash
end

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# File 'lib/thread_safe/util/power_of_two_tuple.rb', line 21

def next_in_size_table
  self.class.new(size << 1)
end

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# File 'lib/thread_safe/util/power_of_two_tuple.rb', line 13

def volatile_get_by_hash(hash)
  volatile_get(hash_to_index(hash))
end

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# File 'lib/thread_safe/util/power_of_two_tuple.rb', line 17

def volatile_set_by_hash(hash, value)
  volatile_set(hash_to_index(hash), value)
end