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class Thread
MUTEX_FOR_THREAD_EXCLUSIVE = Mutex.new # :nodoc:
# call-seq:
# Thread.exclusive { block } => obj
#
# Wraps a block in Thread.critical, restoring the original value
# upon exit from the critical section, and returns the value of the
# block.
def self.exclusive
MUTEX_FOR_THREAD_EXCLUSIVE.synchronize{
yield
}
end
end
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