1 /*
2  *
3  * Copyright 2017 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #ifndef GRPC_CORE_LIB_GPRPP_ABSTRACT_H
20 #define GRPC_CORE_LIB_GPRPP_ABSTRACT_H
21 
22 // This is needed to support abstract base classes in the c core. Since gRPC
23 // doesn't have a c++ runtime, it will hit a linker error on delete unless
24 // we define a virtual operator delete. See this blog for more info:
25 // https://eli.thegreenplace.net/2015/c-deleting-destructors-and-virtual-operator-delete/
26 #define GRPC_ABSTRACT_BASE_CLASS \
27   static void operator delete(void* p) { abort(); }
28 
29 // gRPC currently can't depend on libstdc++, so we can't use "= 0" for
30 // pure virtual methods.  Instead, we use this macro.
31 #define GRPC_ABSTRACT                                                        \
32   {                                                                          \
33     gpr_log(GPR_ERROR, "Function marked GRPC_ABSTRACT was not implemented"); \
34     GPR_ASSERT(false);                                                       \
35   }
36 
37 #endif /* GRPC_CORE_LIB_GPRPP_ABSTRACT_H */
38