From c6373f53f4690d667e553ed7258e13c3b45aa323 Mon Sep 17 00:00:00 2001
From: Josh Blum
Date: Sun, 7 Jul 2013 11:50:03 -0700
Subject: gras: created element factory
---
include/gras/factory.hpp | 85 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
create mode 100644 include/gras/factory.hpp
(limited to 'include/gras/factory.hpp')
diff --git a/include/gras/factory.hpp b/include/gras/factory.hpp
new file mode 100644
index 0000000..926025e
--- /dev/null
+++ b/include/gras/factory.hpp
@@ -0,0 +1,85 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#ifndef INCLUDED_GRAS_FACTORY_HPP
+#define INCLUDED_GRAS_FACTORY_HPP
+
+#include <gras/gras.hpp>
+#include <gras/element.hpp>
+#include <PMC/PMC.hpp>
+#include <string>
+
+//! A fixture for static initialization code
+#define GRAS_STATIC_BLOCK(name) \
+ static struct name ## _static_fixture__ \
+ { \
+ name ## _static_fixture__(void); \
+ } name ## _static_fixture_instance__; \
+ name ## _static_fixture__::name ## _static_fixture__(void)
+
+/*!
+ * Register a block's factory function:
+ * Declare this macro at the global scope in a cpp file.
+ * The block will register at static initialization time.
+ */
+#define GRAS_REGISTER_FACTORY(name) \
+ GRAS_STATIC_BLOCK(name) \
+ {gras::Factory::register_make(#name, &name);}
+
+namespace gras
+{
+
+/*!
+ * Element factory:
+ * - Register factory functions into the global factory.
+ * - Call make() to create element from global factory.
+ *
+ * Example register a factory function:
+ * gras::Factory::register_make("make_my_block", &make_my_block);
+ *
+ * Example call into the factory:
+ * gras::Element *my_block = gras::Factory::make("make_my_block", arg0, arg1);
+ */
+class GRAS_API Factory : Callable
+{
+public:
+
+ /*******************************************************************
+ * Register API - don't look here, template magic, not helpful
+ ******************************************************************/
+ template <typename ReturnType>
+ static void register_make(const std::string &name, ReturnType(*fcn)(void));
+
+ template <typename ReturnType, typename Arg0>
+ static void register_make(const std::string &name, ReturnType(*fcn)(const Arg0 &));
+
+ template <typename ReturnType, typename Arg0, typename Arg1>
+ static void register_make(const std::string &name, ReturnType(*fcn)(const Arg0 &, const Arg1 &));
+
+ template <typename ReturnType, typename Arg0, typename Arg1, typename Arg2>
+ static void register_make(const std::string &name, ReturnType(*fcn)(const Arg0 &, const Arg1 &, const Arg2 &));
+
+ /*******************************************************************
+ * Make API - don't look here, template magic, not helpful
+ ******************************************************************/
+ inline
+ static Element *make(const std::string &name);
+
+ template <typename Arg0>
+ static Element *make(const std::string &name, const Arg0 &a0);
+
+ template <typename Arg0, typename Arg1>
+ static Element *make(const std::string &name, const Arg0 &a0, const Arg1 &a1);
+
+ template <typename Arg0, typename Arg1, typename Arg2>
+ static Element *make(const std::string &name, const Arg0 &a0, const Arg1 &a1, const Arg2 &a2);
+
+private:
+ static void _register_make(const std::string &, void *);
+ static Element *_make(const std::string &, const PMCC &);
+};
+
+}
+
+#include <gras/detail/factory.hpp>
+
+#endif /*INCLUDED_GRAS_FACTORY_HPP*/
--
cgit