1 /* 2 * Copyright (C) 2020 The Android Open Source Project 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 #ifndef SRC_TRACE_PROCESSOR_UTIL_STATUS_MACROS_H_ 18 #define SRC_TRACE_PROCESSOR_UTIL_STATUS_MACROS_H_ 19 20 #include "perfetto/trace_processor/status.h" 21 22 // Evaluates |expr|, which should return a util::Status. If the status is an 23 // error status, returns the status from the current function. 24 #define RETURN_IF_ERROR(expr) \ 25 do { \ 26 base::Status status_macro_internal_status = (expr); \ 27 if (!status_macro_internal_status.ok()) \ 28 return status_macro_internal_status; \ 29 } while (0) 30 31 #define PERFETTO_INTERNAL_CONCAT_IMPL(x, y) x##y 32 #define PERFETTO_INTERNAL_MACRO_CONCAT(x, y) PERFETTO_INTERNAL_CONCAT_IMPL(x, y) 33 34 // Evalues |rhs| which should return a base::StatusOr<T> and assigns this 35 // to |lhs|. If the status is an error status, returns the status from the 36 // current function. 37 #define ASSIGN_OR_RETURN(lhs, rhs) \ 38 PERFETTO_INTERNAL_MACRO_CONCAT(auto status_or, __LINE__) = rhs; \ 39 RETURN_IF_ERROR( \ 40 PERFETTO_INTERNAL_MACRO_CONCAT(status_or, __LINE__).status()); \ 41 lhs = std::move(PERFETTO_INTERNAL_MACRO_CONCAT(status_or, __LINE__).value()) 42 43 #endif // SRC_TRACE_PROCESSOR_UTIL_STATUS_MACROS_H_ 44