imported Löve GLES branch (changeset 1ba9037e558b)

jni/love/src/common/Module.cpp

@@ -0,0 +1,124 @@
+/**
+ * Copyright (c) 2006-2013 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+// LOVE
+#include "Module.h"
+#include "Exception.h"
+
+// std
+#include <map>
+#include <utility>
+#include <string>
+
+namespace
+{
+	typedef std::map<std::string, love::Module*> ModuleRegistry;
+
+	// The registry must be dynamically managed, because some modules
+	// (the math module) are static globals that are not guaranteed to
+	// be destroyed before other static globals.
+	ModuleRegistry *registry = nullptr;
+
+	ModuleRegistry &registryInstance()
+	{
+		if (!registry)
+			registry = new ModuleRegistry;
+
+		return *registry;
+	}
+
+	void freeEmptyRegistry()
+	{
+		if (registry && registry->empty())
+		{
+			delete registry;
+			registry = nullptr;
+		}
+	}
+
+} // anonymous namespace
+
+namespace love
+{
+
+Module::~Module()
+{
+	ModuleRegistry &registry = registryInstance();
+
+	// We can't use the overridden Module::getName() in this destructor.
+	for (auto it = registry.begin(); it != registry.end(); ++it)
+	{
+		if (it->second == this)
+		{
+			registry.erase(it);
+			break;
+		}
+	}
+
+	freeEmptyRegistry();
+}
+
+void Module::registerInstance(Module *instance)
+{
+	if (instance == nullptr)
+		throw Exception("Module instance is NULL");
+
+	std::string name(instance->getName());
+
+	ModuleRegistry &registry = registryInstance();
+
+	auto it = registry.find(name);
+
+	if (it != registry.end())
+	{
+		if (it->second == instance)
+			return;
+		throw Exception("Module %s already registered!", instance->getName());
+	}
+
+	registry.insert(make_pair(name, instance));
+}
+
+Module *Module::getInstance(const std::string &name)
+{
+	ModuleRegistry &registry = registryInstance();
+
+	auto it = registry.find(name);
+
+	if (registry.end() == it)
+		return nullptr;
+
+	return it->second;
+}
+
+Module *Module::findInstance(const std::string &name)
+{
+	ModuleRegistry &registry = registryInstance();
+
+	for (auto it = registry.begin(); it != registry.end(); ++it)
+	{
+		if (it->first.find(name) == 0)
+			return it->second;
+	}
+
+	return nullptr;
+}
+
+} // love