Add bin and edit workflow

bin/gems/ffi-1.17.1-x86_64-linux-gnu/lib/ffi/function.rb

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+#
+# Copyright (C) 2008-2010 JRuby project
+#
+# This file is part of ruby-ffi.
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+# * Neither the name of the Ruby FFI project nor the names of its contributors
+#   may be used to endorse or promote products derived from this software
+#   without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+module FFI
+  class Function
+    # Only MRI allows function type queries
+    if private_method_defined?(:type)
+      # Retrieve the return type of the function
+      #
+      # This method returns FFI type returned by the function.
+      #
+      # @return [FFI::Type]
+      def return_type
+        type.return_type
+      end
+
+      # Retrieve Array of parameter types
+      #
+      # This method returns an Array of FFI types accepted as function parameters.
+      #
+      # @return [Array<FFI::Type>]
+      def param_types
+        type.param_types
+      end
+    end
+
+    # Stash the Function in a module variable so it can be inspected by attached_functions.
+    # On CRuby it also ensures that it does not get garbage collected.
+    module RegisterAttach
+      def attach(mod, name)
+        funcs = mod.instance_variable_defined?("@ffi_functions") && mod.instance_variable_get("@ffi_functions")
+        unless funcs
+          funcs = {}
+          mod.instance_variable_set("@ffi_functions", funcs)
+        end
+        funcs[name.to_sym] = self
+        # Jump to the native attach method of CRuby, JRuby or Tuffleruby
+        super
+      end
+    end
+    private_constant :RegisterAttach
+    prepend RegisterAttach
+  end
+end