1 /* 2 * Copyright (c) 2015 PLUMgrid, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <cstdio> 20 #include <string> 21 22 namespace ebpf { 23 24 class StatusTuple { 25 public: StatusTuple(int ret)26 StatusTuple(int ret) : ret_(ret) {} 27 StatusTuple(int ret,const char * msg)28 StatusTuple(int ret, const char *msg) : ret_(ret), msg_(msg) {} 29 StatusTuple(int ret,const std::string & msg)30 StatusTuple(int ret, const std::string &msg) : ret_(ret), msg_(msg) {} 31 32 template <typename... Args> StatusTuple(int ret,const char * fmt,Args...args)33 StatusTuple(int ret, const char *fmt, Args... args) : ret_(ret) { 34 char buf[2048]; 35 snprintf(buf, sizeof(buf), fmt, args...); 36 msg_ = std::string(buf); 37 } 38 append_msg(const std::string & msg)39 void append_msg(const std::string& msg) { 40 msg_ += msg; 41 } 42 code()43 int code() { return ret_; } 44 msg()45 std::string msg() { return msg_; } 46 47 private: 48 int ret_; 49 std::string msg_; 50 }; 51 52 #define TRY2(CMD) \ 53 do { \ 54 StatusTuple __stp = (CMD); \ 55 if (__stp.code() != 0) { \ 56 return __stp; \ 57 } \ 58 } while (0) 59 60 } // namespace ebpf 61