added event_manager

event_manager for passing the events from the SDL thread to the event
thread

1 files changed, 106 insertions, 0 deletions

diff --git a/src/menu/event_manager.cpp b/src/menu/event_manager.cpp
new file mode 100644
index 00000000..990df875
--- /dev/null
+++ b/src/menu/event_manager.cpp
@@ -0,0 +1,106 @@
+/*
+ * 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.
+ *
+ * $URL$
+ * $Id$
+ */
+
+#include "event_manager.hpp"
+#include <iostream>
+
+namespace usdx
+{
+	log4cxx::LoggerPtr EventManager::log =
+		log4cxx::Logger::getLogger("usdx.menu.event_manager");
+
+	EventManager::EventManager(int capacity) :
+		buffer(capacity), waiting(0)
+	{
+	}
+
+	EventManager::~EventManager(void)
+	{
+	}
+
+	bool EventManager::is_not_full() const
+	{
+		return waiting < buffer.capacity();
+	}
+
+	bool EventManager::is_not_empty() const
+	{
+		return waiting > 0;
+	}
+
+	void EventManager::add_event(const SDL_Event& event)
+	{
+		boost::mutex::scoped_lock lock(mutex);
+
+		not_full.wait(lock, boost::bind(&EventManager::is_not_full, this));
+
+		buffer.push_front(new SDL_Event(event));
+		++waiting;
+
+		lock.unlock();
+		not_empty.notify_one();
+	}
+
+	void EventManager::get_next_event(SDL_Event& event)
+	{
+		boost::mutex::scoped_lock lock(mutex);
+
+		not_empty.wait(lock, boost::bind(&EventManager::is_not_empty, this));
+
+		--waiting;
+		event = *buffer[waiting];
+		delete buffer[waiting];
+
+		lock.unlock();
+		not_full.notify_one();
+	}
+
+	bool EventManager::available(void)
+	{
+		boost::mutex::scoped_lock lock(mutex);
+		return waiting < buffer.capacity();
+	}
+
+	void EventManager::handle_events(void)
+	{
+		SDL_Event event;
+
+		// run forever until this thread is interrupted
+		while (true) {
+			get_next_event(event);
+
+			switch (event.type) {
+			case SDL_KEYDOWN:
+				LOG4CXX_ERROR(log, L"key");
+				break;
+
+			case SDL_MOUSEMOTION:
+				LOG4CXX_ERROR(log, L"mouse");
+			}
+		}
+	}
+};
+