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require 'concurrent/utility/engine'
module Concurrent
module Utility
# @!visibility private
module NativeExtensionLoader
def allow_c_extensions?
Concurrent.on_cruby?
end
def c_extensions_loaded?
defined?(@c_extensions_loaded) && @c_extensions_loaded
end
def java_extensions_loaded?
defined?(@java_extensions_loaded) && @java_extensions_loaded
end
def load_native_extensions
unless defined? Synchronization::AbstractObject
raise 'native_extension_loader loaded before Synchronization::AbstractObject'
end
if Concurrent.on_cruby? && !c_extensions_loaded?
['concurrent/concurrent_ruby_ext',
"concurrent/#{RUBY_VERSION[0..2]}/concurrent_ruby_ext"
].each { |p| try_load_c_extension p }
end
if Concurrent.on_jruby? && !java_extensions_loaded?
begin
require 'concurrent/concurrent_ruby.jar'
set_java_extensions_loaded
rescue LoadError => e
raise e, "Java extensions are required for JRuby.\n" + e.message, e.backtrace
end
end
end
private
def load_error_path(error)
if error.respond_to? :path
error.path
else
error.message.split(' -- ').last
end
end
def set_c_extensions_loaded
@c_extensions_loaded = true
end
def set_java_extensions_loaded
@java_extensions_loaded = true
end
def try_load_c_extension(path)
require path
set_c_extensions_loaded
rescue LoadError => e
if load_error_path(e) == path
# move on with pure-Ruby implementations
# TODO (pitr-ch 12-Jul-2018): warning on verbose?
else
raise e
end
end
end
end
# @!visibility private
extend Utility::NativeExtensionLoader
end
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