# File actionview/lib/action_view/unbound_template.rb, line 10
def initialize(source, identifier, details:, virtual_path:)
  @source = source
  @identifier = identifier
  @details = details
  @virtual_path = virtual_path

  @templates = Concurrent::Map.new(initial_capacity: 2)
  @write_lock = Mutex.new
end

# File actionview/lib/action_view/unbound_template.rb, line 20
def bind_locals(locals)
  if template = @templates[locals]
    template
  else
    @write_lock.synchronize do
      normalized_locals = normalize_locals(locals)

      # We need ||=, both to dedup on the normalized locals and to check
      # while holding the lock.
      @templates[normalized_locals] ||= build_template(normalized_locals)

      # This may have already been assigned, but we've already de-dup'd so
      # reassignment is fine.
      @templates[locals.dup] = @templates[normalized_locals]
    end
  end
end