Internal: Prior to invoking Kernel#require, issues a warning urging a manual require if running in a threaded environment.
name - the String name of the library to require.
returns false if the library is detected on the load path or the return value of delegating to Kernel#require
# File lib/asciidoctor/helpers.rb, line 10 def self.require_library(name) if Thread.list.size > 1 main_script = "#{name}.rb" main_script_path_segment = "/#{name}.rb" if !$LOADED_FEATURES.detect {|p| p == main_script || p.end_with?(main_script_path_segment) }.nil? return false else warn "WARN: asciidoctor is autoloading '#{name}' in threaded environment. " + "The use of an explicit require '#{name}' statement is recommended." end end require name end