love2d.love/src/modules/thread/wrap_Channel.cpp

/**
* Copyright (c) 2006-2010 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_Channel.h"

namespace love
{
namespace thread
{
void retainVariant(Channel *c, Variant *v)
{
	c->lockMutex();
	v->retain();
	c->unlockMutex();
}

void releaseVariant(Channel *c, Variant *v)
{
	c->lockMutex();
	v->release();
	c->unlockMutex();
}

Channel *luax_checkchannel(lua_State *L, int idx)
{
	return luax_checktype<Channel>(L, idx, "Channel", THREAD_CHANNEL_T);
}

int w_Channel_push(lua_State *L)
{
	Channel *c = luax_checkchannel(L, 1);
	Variant *var = lua_isnoneornil(L, 2) ? 0 : Variant::fromLua(L, 2);
	if (!var)
		return luaL_argerror(L, 2, "boolean, number, string, or love type expected");
	c->push(var);
	releaseVariant(c, var);
	return 0;
}

int w_Channel_supply(lua_State *L)
{
	Channel *c = luax_checkchannel(L, 1);
	Variant *var = lua_isnoneornil(L, 2) ? 0 : Variant::fromLua(L, 2);
	if (!var)
		return luaL_argerror(L, 2, "boolean, number, string, or love type expected");
	c->supply(var);
	releaseVariant(c, var);
	return 0;
}

int w_Channel_pop(lua_State *L)
{
	Channel *c = luax_checkchannel(L, 1);
	Variant *var = c->pop();
	if (var)
	{
		var->toLua(L);
		releaseVariant(c, var);
	}
	else
		lua_pushnil(L);
	return 1;
}

int w_Channel_demand(lua_State *L)
{
	Channel *c = luax_checkchannel(L, 1);
	Variant *var = c->demand();
	var->toLua(L);
	releaseVariant(c, var);
	return 1;
}

int w_Channel_peek(lua_State *L)
{
	Channel *c = luax_checkchannel(L, 1);
	Variant *var = c->peek();
	if (var)
	{
		var->toLua(L);
		releaseVariant(c, var);
	}
	else
		lua_pushnil(L);
	return 1;
}

int w_Channel_getCount(lua_State *L)
{
	Channel *c = luax_checkchannel(L, 1);
	lua_pushnumber(L, c->getCount());
	return 1;
}

int w_Channel_clear(lua_State *L)
{
	Channel *c = luax_checkchannel(L, 1);
	c->clear();
	return 0;
}

static const luaL_Reg type_functions[] = {
	{ "push", w_Channel_push },
	{ "supply", w_Channel_supply },
	{ "pop", w_Channel_pop },
	{ "demand", w_Channel_demand },
	{ "peek", w_Channel_peek },
	{ "getCount", w_Channel_getCount },
	{ "clear", w_Channel_clear },
	{ 0, 0 }
};

extern "C" int luaopen_channel(lua_State *L)
{
	return luax_register_type(L, "Channel", type_functions);
}
}
}