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require 'concurrent/utility/engine'
require 'concurrent/thread_safe/util'
module Concurrent
if Concurrent.on_cruby?
# @!macro [attach] concurrent_hash
#
# A thread-safe subclass of Hash. This version locks against the object
# itself for every method call, ensuring only one thread can be reading
# or writing at a time. This includes iteration methods like `#each`.
#
# @see http://ruby-doc.org/core-2.2.0/Hash.html Ruby standard library `Hash`
class Hash < ::Hash;
end
elsif Concurrent.on_jruby?
require 'jruby/synchronized'
# @!macro concurrent_hash
class Hash < ::Hash
include JRuby::Synchronized
end
elsif Concurrent.on_rbx?
require 'monitor'
require 'concurrent/thread_safe/util/array_hash_rbx'
# @!macro concurrent_hash
class Hash < ::Hash
end
ThreadSafe::Util.make_synchronized_on_rbx Hash
end
end
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