text: /*
   *  Copyright 2014 The Luvit Authors. All Rights Reserved.
   *
   *  Licensed under the Apache License, Version 2.0 (the "License");
   *  you may not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   *
   */
  #include "luv.h"
  
  static uv_prepare_t* luv_check_prepare(lua_State* L, int index) {
    uv_prepare_t* handle = luaL_checkudata(L, index, "uv_prepare");
    luaL_argcheck(L, handle->type == UV_PREPARE && handle->data, index, "Expected uv_prepare_t");
    return handle;
  }
  
  static int luv_new_prepare(lua_State* L) {
    uv_prepare_t* handle = lua_newuserdata(L, sizeof(*handle));
    int ret = uv_prepare_init(luv_loop(L), handle);
    if (ret < 0) {
      lua_pop(L, 1);
      return luv_error(L, ret);
    }
    handle->data = luv_setup_handle(L);
    return 1;
  }
  
  static void luv_prepare_cb(uv_prepare_t* handle) {
    lua_State* L = luv_state(handle->loop);
    luv_handle_t* data = handle->data;
    luv_call_callback(L, data, LUV_PREPARE, 0);
  }
  
  static int luv_prepare_start(lua_State* L) {
    uv_prepare_t* handle = luv_check_prepare(L, 1);
    int ret;
    luv_check_callback(L, handle->data, LUV_PREPARE, 2);
    ret = uv_prepare_start(handle, luv_prepare_cb);
    if (ret < 0) return luv_error(L, ret);
    lua_pushinteger(L, ret);
    return 1;
  }
  
  static int luv_prepare_stop(lua_State* L) {
    uv_prepare_t* handle = luv_check_prepare(L, 1);
    int ret = uv_prepare_stop(handle);
    if (ret < 0) return luv_error(L, ret);
    lua_pushinteger(L, ret);
    return 1;
  }
  
  