gio: Add private API to create win32 streams from fds

This will be used by GSubprocess.

https://bugzilla.gnome.org/show_bug.cgi?id=672102

gio/giowin32-priv.h

@@ -0,0 +1,42 @@
+/* GIO - GLib Input, Output and Streaming Library
+ * 
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Colin Walters <walters@verbum.org>
+ */
+
+#ifndef __G_IO_WIN32_PRIV_H__
+#define __G_IO_WIN32_PRIV_H__
+
+#include "gwin32inputstream.h"
+#include "gwin32outputstream.h"
+
+G_BEGIN_DECLS
+
+G_GNUC_INTERNAL
+GInputStream *
+g_win32_input_stream_new_from_fd (gint      fd,
+				  gboolean  close_fd);
+
+GOutputStream *
+g_win32_output_stream_new_from_fd (gint      fd,
+				   gboolean  close_fd);
+
+G_END_DECLS
+
+#endif /* __G_IO_MODULE_PRIV_H__ */