1 files changed, 39 insertions, 0 deletions
diff --git a/Lib/mzscheme/std_unique_ptr.i b/Lib/mzscheme/std_unique_ptr.i
new file mode 100644
index 000000000..53cf46694
--- /dev/null
+++ b/Lib/mzscheme/std_unique_ptr.i
@@ -0,0 +1,39 @@
+/* -----------------------------------------------------------------------------
+ * std_unique_ptr.i
+ *
+ * SWIG library file for handling std::unique_ptr.
+ * Memory ownership is passed from the std::unique_ptr C++ layer to the proxy
+ * class when returning a std::unique_ptr from a function.
+ * Memory ownership is passed from the proxy class to the std::unique_ptr in the
+ * C++ layer when passed as a parameter to a wrapped function.
+ * ----------------------------------------------------------------------------- */
+
+%define %unique_ptr(TYPE)
+%typemap(in, noblock=1) std::unique_ptr< TYPE > (void *argp = 0, int res = 0) {
+  res = SWIG_ConvertPtr($input, &argp, $descriptor(TYPE *), SWIG_POINTER_RELEASE);
+  if (!SWIG_IsOK(res)) {
+    if (res == SWIG_ERROR_RELEASE_NOT_OWNED) {
+      scheme_signal_error(FUNC_NAME ": cannot release ownership as memory is not owned for argument $argnum of type 'TYPE *'");
+    } else {
+      %argument_fail(res, "TYPE *", $symname, $argnum);
+    }
+  }
+  $1.reset((TYPE *)argp);
+}
+
+%typemap (out) std::unique_ptr< TYPE > %{
+  %set_output(SWIG_NewPointerObj($1.release(), $descriptor(TYPE *), SWIG_POINTER_OWN));
+%}
+
+%typemap(typecheck, precedence=SWIG_TYPECHECK_POINTER, equivalent="TYPE *", noblock=1) std::unique_ptr< TYPE > {
+  void *vptr = 0;
+  int res = SWIG_ConvertPtr($input, &vptr, $descriptor(TYPE *), 0);
+  $1 = SWIG_CheckState(res);
+}
+
+%template() std::unique_ptr< TYPE >;
+%enddef
+
+namespace std {
+  template <class T> class unique_ptr {};
+}