selove / src / modules / event / sdl / wrap_Event.cpp

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/**
* Copyright (c) 2006-2012 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.
**/

#include "wrap_Event.h"

// LOVE
#include <common/runtime.h>

// sdlevent
#include "Event.h"

namespace love
{
namespace event
{
namespace sdl
{
	static Event * instance = 0;

	static int poll_i(lua_State * L)
	{
		Message *m;

		while (instance->poll(m))
		{
			int args = m->toLua(L);
			m->release();
			return args;
		}

		// No pending events.
		return 0;
	}

	int w_pump(lua_State *)
	{
		instance->pump();
		return 0;
	}

	int w_poll(lua_State * L)
	{
		lua_pushcclosure(L, &poll_i, 0);
		return 1;
	}

	int w_wait(lua_State * L)
	{
		static Message *m;

		if ((m = instance->wait()))
		{
			int args = m->toLua(L);
			m->release();
			return args;
		}

		return 0;
	}

	int w_push(lua_State * L)
	{
		static Message *m;

		bool success = (m = Message::fromLua(L, 1)) != NULL;
		luax_pushboolean(L, success);

		if (!success)
			return 1;

		instance->push(m);
		m->release();

		return 1;
	}

	int w_clear(lua_State *)
	{
		instance->clear();
		return 0;
	}

	int w_quit(lua_State * L)
	{
		Message *m = new Message("quit");
		instance->push(m);
		m->release();
		luax_pushboolean(L, true);
		return 1;
	}

	// List of functions to wrap.
	static const luaL_Reg functions[] = {
		{ "pump", w_pump },
		{ "poll", w_poll },
		{ "wait", w_wait },
		{ "push", w_push },
		{ "clear", w_clear },
		{ "quit", w_quit },
		{ 0, 0 }
	};

	extern "C" int luaopen_love_event(lua_State * L)
	{
		if (instance == 0)
		{
			try
			{
				instance = new Event();
			}
			catch (Exception & e)
			{
				return luaL_error(L, e.what());
			}
		}
		else
			instance->retain();

		WrappedModule w;
		w.module = instance;
		w.name = "event";
		w.flags = MODULE_T;
		w.functions = functions;
		w.types = 0;

		return luax_register_module(L, w);
	}

} // sdl
} // event
} // love
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