lua/deployer.cpp

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/*
 * Lua-RTT bindings: Lua module for creating a deployer.
 *
 * (C) Copyright 2010 Markus Klotzbuecher
 * markus.klotzbuecher@mech.kuleuven.be
 * Department of Mechanical Engineering,
 * Katholieke Universiteit Leuven, Belgium.
 *
 * This library 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;
 * version 2 of the License.
 *
 * As a special exception, you may use this file as part of a free
 * software library without restriction.  Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License.  This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU General
 * Public License.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place,
 * Suite 330, Boston, MA  02111-1307  USA
 */

extern "C" {
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>

#include <string.h>
}

#include <rtt/TaskContext.hpp>
#include <ocl/OCL.hpp>
#include <deployment/DeploymentComponent.hpp>

using namespace std;
using namespace OCL;
using namespace Orocos;

/* template for generating GC function */
template<typename T>
int GCMethod(lua_State* L)
{
        reinterpret_cast<T*>(lua_touserdata(L, 1))->~T();
        return 0;
}

/*
 * Deployer
 */
static int deployer_new(lua_State *L)
{
        const char *s;
        std::string str;

        s = luaL_checkstring(L, 1);
        str = s;
        DeploymentComponent *d = new DeploymentComponent(str);
        TaskContext** tc = (TaskContext**) lua_newuserdata(L, sizeof(TaskContext*));

        *tc = (TaskContext*) d;
        luaL_getmetatable(L, "TaskContext");
        lua_setmetatable(L, -2);
        return 1;
}

/* only explicit destrutction of deployers */
static const struct luaL_Reg DeploymentComponent_f [] = {
        {"new", deployer_new },
        {NULL, NULL}
};

static const struct luaL_Reg DeploymentComponent_m [] = {
        /* {"__gc", deployer_gc }, */
        {NULL, NULL}
};

extern "C" {
int luaopen_deployer(lua_State *L)
{
        /* register MyObj
         * 1. line creates metatable MyObj and registers name in registry
         * 2. line duplicates metatable
         * 3. line sets metatable[__index]=metatable
         * 4. line register methods in metatable
         * 5. line registers free functions in global mystuff.MyObj table
         */
        luaL_newmetatable(L, "TaskContext");
        lua_pushvalue(L, -1);                   /* duplicates metatable */
        lua_setfield(L, -2, "__index");
        luaL_register(L, NULL, DeploymentComponent_m);
        luaL_register(L, "deployer", DeploymentComponent_f);

        return 1;
}
} /* extern "C" */