merges r23386 from trunk into ruby_1_9_1.

--
* ext/dl/lib/dl/func.rb (DL::Function#bound?): returns if already
  bound to a block.

* ext/dl/lib/dl/value.rb (DL::ValueUtil#wrap_arg): block must be
  given if arg is not bound.  [ruby-dev:38404]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@23519 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 6 insertions, 0 deletions

diff --git a/ext/dl/lib/dl/func.rb b/ext/dl/lib/dl/func.rb
index a2e6d40fb..f0e1ca71e 100644
--- a/ext/dl/lib/dl/func.rb
+++ b/ext/dl/lib/dl/func.rb
@@ -97,6 +97,10 @@ module DL
       end
     end
 
+    def bound?()
+      @cfunc.ptr != 0
+    end
+
     def bind_at_call(&block)
       bind(&block)
     end
diff --git a/ext/dl/lib/dl/value.rb b/ext/dl/lib/dl/value.rb
index aa7e0dd32..254e1921c 100644
--- a/ext/dl/lib/dl/value.rb
+++ b/ext/dl/lib/dl/value.rb
@@ -61,6 +61,8 @@ module DL
           if( block )
             arg.bind_at_call(&block)
             funcs.push(arg)
+          elsif !arg.bound?
+            raise(RuntimeError, "block must be given.")
           end
           return arg.to_i
         when String