1* /*
2*  * Copyright 2021 Google LLC
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* #define RETURN_IF_ERROR(expr, msg)                                             \
20*     do                                                                         \
21*     {                                                                          \
22*         int _ret = (expr);                                                     \
23*         if (_ret < 0)                                                          \
24*         {                                                                      \
25*             std::perror(msg);                                                  \
26*             return _ret;                                                       \
27*         }                                                                      \
28*     } while (0)
29*