Module: Csso::CallJS

Included in:
Loader, Optimizer
Defined in:
lib/csso/utils.rb

Overview

Utility for calling into the JavaScript runtime.

Instance Method Summary collapse

Instance Method Details

#calljs(err_cls = WrappedError) { ... } ⇒ Object

Wrap JavaScript invocations with uniform error handling

Yields:

  • code to wrap



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# File 'lib/csso/utils.rb', line 9

def calljs err_cls=WrappedError
  lock do
    yield
  end
rescue V8::JSError => e
  raise err_cls.new(e)
end

#lock { ... } ⇒ Object

Ensure proper locking before entering the V8 API

Yields:

  • code to wrap in lock



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# File 'lib/csso/utils.rb', line 21

def lock
  result, exception = nil, nil
  V8::C::Locker() do
    begin
      result = yield
    rescue Exception => e
      exception = e
    end
  end
  if exception
    raise exception
  else
    result
  end
end