/* * Copyright (c) 2015 PLUMgrid, Inc. * * 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. */ #pragma once #include <exception> #include <string> #include <tuple> #include <cstring> #include <cerrno> #include <cstdlib> #undef NDEBUG namespace ebpf { template <typename... Args> std::tuple<int, std::string> mkstatus(int ret, const char *fmt, Args... args) { char buf[1024]; snprintf(buf, sizeof(buf), fmt, args...); return std::make_tuple(ret, std::string(buf)); } static inline std::tuple<int, std::string> mkstatus(int ret, const char *msg) { return std::make_tuple(ret, std::string(msg)); } static inline std::tuple<int, std::string> mkstatus(int ret) { return std::make_tuple(ret, std::string()); } #define TRY(CMD) \ do { \ int __status = (CMD); \ if (__status != 0) { \ return __status; \ } \ } while (0) #define TRY2(CMD) \ do { \ std::tuple<int, std::string> __stp = (CMD); \ if (std::get<0>(__stp) != 0) { \ return __stp; \ } \ } while (0) } // namespace ebpf