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/*
* 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_poll_t* luv_check_poll(lua_State* L, int index) {
uv_poll_t* handle = luv_checkudata(L, index, "uv_poll");
luaL_argcheck(L, handle->type == UV_POLL && handle->data, index, "Expected uv_poll_t");
return handle;
}
static int luv_new_poll(lua_State* L) {
int fd = luaL_checkinteger(L, 1);
uv_poll_t* handle = luv_newuserdata(L, sizeof(*handle));
int ret = uv_poll_init(luv_loop(L), handle, fd);
if (ret < 0) {
lua_pop(L, 1);
return luv_error(L, ret);
}
handle->data = luv_setup_handle(L);
return 1;
}
static int luv_new_socket_poll(lua_State* L) {
int fd = luaL_checkinteger(L, 1);
uv_poll_t* handle = luv_newuserdata(L, sizeof(*handle));
int ret = uv_poll_init_socket(luv_loop(L), handle, fd);
if (ret < 0) {
lua_pop(L, 1);
return luv_error(L, ret);
}
handle->data = luv_setup_handle(L);
return 1;
}
// These are the same order as uv_run_mode which also starts at 0
static const char *const luv_pollevents[] = {
"r", "w", "rw", NULL
};
static void luv_poll_cb(uv_poll_t* handle, int status, int events) {
lua_State* L = luv_state(handle->loop);
luv_handle_t* data = handle->data;
const char* evtstr;
if (status < 0) {
fprintf(stderr, "%s: %s\n", uv_err_name(status), uv_strerror(status));
lua_pushstring(L, uv_err_name(status));
}
else {
lua_pushnil(L);
}
switch (events) {
case UV_READABLE: evtstr = "r"; break;
case UV_WRITABLE: evtstr = "w"; break;
case UV_READABLE|UV_WRITABLE: evtstr = "rw"; break;
default: evtstr = ""; break;
}
lua_pushstring(L, evtstr);
luv_call_callback(L, data, LUV_POLL, 2);
}
static int luv_poll_start(lua_State* L) {
uv_poll_t* handle = luv_check_poll(L, 1);
int events, ret;
switch (luaL_checkoption(L, 2, "rw", luv_pollevents)) {
case 0: events = UV_READABLE; break;
case 1: events = UV_WRITABLE; break;
case 2: events = UV_READABLE | UV_WRITABLE; break;
default: events = 0; /* unreachable */
}
luv_check_callback(L, handle->data, LUV_POLL, 3);
ret = uv_poll_start(handle, events, luv_poll_cb);
if (ret < 0) return luv_error(L, ret);
lua_pushinteger(L, ret);
return 1;
}
static int luv_poll_stop(lua_State* L) {
uv_poll_t* handle = luv_check_poll(L, 1);
int ret = uv_poll_stop(handle);
if (ret < 0) return luv_error(L, ret);
lua_pushinteger(L, ret);
return 1;
}
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