2 files changed, 159 insertions, 0 deletions
diff --git a/src/menu/gl_delayed_allocation.cpp b/src/menu/gl_delayed_allocation.cpp
new file mode 100644
index 00000000..f30b15d5
--- /dev/null
+++ b/src/menu/gl_delayed_allocation.cpp
@@ -0,0 +1,94 @@
+/*
+ * UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "gl_delayed_allocation.hpp"
+#include "application.hpp"
+
+namespace usdx
+{
+	log4cpp::Category& GlDelayedAllocation::log =
+		log4cpp::Category::getInstance("usdx.menu.gl_delayed_allocation");
+
+	GlDelayedAllocation::GlDelayedAllocation()
+		: initialized(false), end_of_life(false)
+	{
+	}
+
+	GlDelayedAllocation::~GlDelayedAllocation()
+	{
+		boost::shared_lock<boost::shared_mutex> lock(initialized_mutex);
+		if (initialized) {
+			log << log4cpp::Priority::ERROR << "You forgot to call dispose, "
+				<< "before destroying an object with GlDelayedAllocation";
+		}
+	}
+
+	void GlDelayedAllocation::do_dispose(void)
+	{
+		boost::upgrade_lock<boost::shared_mutex> initialized_lock(initialized_mutex);
+		if (initialized) {
+			{
+				boost::unique_lock<boost::shared_mutex> end_of_life_lock(end_of_life_mutex);
+				end_of_life = true;
+			}
+
+			if (Application::is_gl_thread()) {
+				this->gl_cleanup();
+
+				boost::upgrade_to_unique_lock<boost::shared_mutex> unique_lock(initialized_lock);
+				initialized = false;
+			}
+			else {
+				dispose_done.wait(initialized_lock);
+			}
+		}
+	}
+
+	void GlDelayedAllocation::enable(void)
+	{
+		boost::upgrade_lock<boost::shared_mutex> initialized_lock(initialized_mutex);
+		if (!initialized) {
+			this->gl_initialize();
+
+			boost::upgrade_to_unique_lock<boost::shared_mutex> unique_lock(initialized_lock);
+			initialized = true;
+		}
+	}
+
+	void GlDelayedAllocation::disable(void)
+	{
+		boost::upgrade_lock<boost::shared_mutex> initialized_lock(initialized_mutex);
+		boost::upgrade_lock<boost::shared_mutex> end_of_life_lock(end_of_life_mutex);
+		if (initialized && end_of_life) {
+			this->gl_cleanup();
+
+			{
+				boost::upgrade_to_unique_lock<boost::shared_mutex> unique_lock(initialized_lock);
+				initialized = false;
+			}
+
+			dispose_done.notify_all();
+		}
+	}
+};
diff --git a/src/menu/gl_delayed_allocation.hpp b/src/menu/gl_delayed_allocation.hpp
new file mode 100644
index 00000000..92fe3600
--- /dev/null
+++ b/src/menu/gl_delayed_allocation.hpp
@@ -0,0 +1,65 @@
+/*
+ * UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef GL_DELAYED_ALLOCATION_HPP
+#define GL_DELAYED_ALLOCATION_HPP
+
+#include <log4cpp/Category.hh>
+#include <boost/thread/shared_mutex.hpp>
+#include <boost/thread/condition.hpp>
+
+#include "utils/disposable.hpp"
+#include "utils/activatable.hpp"
+#include "drawable.hpp"
+
+namespace usdx
+{
+    class GlDelayedAllocation : public Activatable, public Disposable
+	{
+	private:
+		static log4cpp::Category& log;
+
+		bool initialized;
+		bool end_of_life;
+
+		boost::shared_mutex initialized_mutex;
+		boost::shared_mutex end_of_life_mutex;
+		boost::condition dispose_done;
+
+	protected:
+		virtual void gl_initialize(void) = 0;
+		virtual void gl_cleanup(void) = 0;
+
+		virtual void do_dispose(void);
+
+	public:
+		GlDelayedAllocation();
+		virtual ~GlDelayedAllocation();
+
+		virtual void enable(void);
+		virtual void disable(void);
+	};
+};
+
+#endif