| // Copyright 2020 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| |
| // Configuration macros for the pw_rpc module. |
| #pragma once |
| |
| #include <cstddef> |
| |
| // The Nanopb-based pw_rpc implementation allocates memory to use for Nanopb |
| // structs for the request and response protobufs. The template function that |
| // allocates these structs rounds struct sizes up to this value so that |
| // different structs can be allocated with the same function. Structs with sizes |
| // larger than this value cause an extra function to be created, which slightly |
| // increases code size. |
| // |
| // Ideally, this value will be set to the size of the largest Nanopb struct used |
| // as an RPC request or response. The buffer can be stack or globally allocated |
| // (see PW_RPC_NANOPB_STRUCT_BUFFER_STACK_ALLOCATE). |
| #ifndef PW_RPC_NANOPB_STRUCT_MIN_BUFFER_SIZE |
| #define PW_RPC_NANOPB_STRUCT_MIN_BUFFER_SIZE 64 |
| #endif // PW_RPC_NANOPB_STRUCT_MIN_BUFFER_SIZE |
| |
| namespace pw::rpc::cfg { |
| |
| inline constexpr size_t kNanopbStructMinBufferSize = |
| PW_RPC_NANOPB_STRUCT_MIN_BUFFER_SIZE; |
| |
| } // namespace pw::rpc::cfg |
| |
| #undef PW_RPC_NANOPB_STRUCT_MIN_BUFFER_SIZE |
| |
| // This option determines whether to allocate the Nanopb structs on the stack or |
| // in a global variable. Globally allocated structs are NOT thread safe, but |
| // work fine when the RPC server's ProcessPacket function is only called from |
| // one thread. |
| #ifndef PW_RPC_NANOPB_STRUCT_BUFFER_STACK_ALLOCATE |
| #define PW_RPC_NANOPB_STRUCT_BUFFER_STACK_ALLOCATE 1 |
| #endif // PW_RPC_NANOPB_STRUCT_BUFFER_STACK_ALLOCATE |
| |
| #if PW_RPC_NANOPB_STRUCT_BUFFER_STACK_ALLOCATE |
| #define _PW_RPC_NANOPB_STRUCT_STORAGE_CLASS |
| #else |
| #define _PW_RPC_NANOPB_STRUCT_STORAGE_CLASS static |
| #endif // PW_RPC_NANOPB_STRUCT_BUFFER_STACK_ALLOCATE |
| |
| #undef PW_RPC_NANOPB_STRUCT_BUFFER_STACK_ALLOCATE |
