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/*!A cross-platform build utility based on Lua
*
* 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.
*
* Copyright (C) 2015-present, Xmake Open Source Community.
*
* @author ruki
* @file filelock_trylock.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "filelock_trylock"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
/* try to lock file
*
* exclusive lock: io.filelock_trylock("/xxxx/filelock")
* shared lock: io.filelock_trylock("/xxxx/filelock", {shared = true})
*/
tb_int_t xm_io_filelock_trylock(lua_State *lua) {
tb_assert_and_check_return_val(lua, 0);
// get option argument
tb_bool_t is_shared = tb_false;
if (lua_istable(lua, 2)) {
// is shared lock?
lua_pushstring(lua, "shared");
lua_gettable(lua, 2);
is_shared = (tb_bool_t)lua_toboolean(lua, -1);
lua_pop(lua, 1);
}
// check lock?
if (!xm_lua_ispointer(lua, 1)) {
return 0;
}
// get lock
tb_filelock_ref_t lock = (tb_filelock_ref_t)xm_lua_topointer(lua, 1);
tb_check_return_val(lock, 0);
// try to lock it
tb_bool_t ok = tb_filelock_enter_try(lock, is_shared ? TB_FILELOCK_MODE_SH : TB_FILELOCK_MODE_EX);
lua_pushboolean(lua, ok);
return 1;
}
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