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