| // 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. |
| |
| #include "pb_decode.h" |
| #include "pb_encode.h" |
| #include "pw_assert/assert.h" |
| #include "pw_bloat/bloat_this_binary.h" |
| #include "pw_log/log.h" |
| #include "pw_rpc/echo_service_nanopb.h" |
| #include "pw_rpc/server.h" |
| #include "pw_sys_io/sys_io.h" |
| |
| int volatile* unoptimizable; |
| |
| class Output : public pw::rpc::ChannelOutput { |
| public: |
| Output() : ChannelOutput("output") {} |
| |
| std::span<std::byte> AcquireBuffer() override { return buffer_; } |
| |
| pw::Status SendAndReleaseBuffer(std::span<const std::byte> buffer) override { |
| PW_DCHECK_PTR_EQ(buffer.data(), buffer_); |
| return pw::sys_io::WriteBytes(buffer).status(); |
| } |
| |
| private: |
| std::byte buffer_[128]; |
| }; |
| |
| namespace my_product { |
| |
| template <typename DecodeFunction> |
| struct NanopbTraits; |
| |
| template <typename FieldsType> |
| struct NanopbTraits<bool(pb_istream_t*, FieldsType, void*)> { |
| using Fields = FieldsType; |
| }; |
| |
| using Fields = typename NanopbTraits<decltype(pb_decode)>::Fields; |
| |
| // Performs the core nanopb encode and decode operations so that those functions |
| // are included in the binary. |
| void DoNanopbStuff() { |
| std::byte buffer[128]; |
| void* fields = &buffer; |
| |
| auto output = pb_ostream_from_buffer(reinterpret_cast<pb_byte_t*>(buffer), |
| sizeof(buffer)); |
| pb_encode(&output, static_cast<Fields>(fields), buffer); |
| |
| auto input = pb_istream_from_buffer( |
| reinterpret_cast<const pb_byte_t*>(buffer), sizeof(buffer)); |
| pb_decode(&input, static_cast<Fields>(fields), buffer); |
| } |
| |
| Output output; |
| pw::rpc::Channel channels[] = {pw::rpc::Channel::Create<1>(&output)}; |
| pw::rpc::Server server(channels); |
| pw::rpc::EchoService echo_service; |
| |
| } // namespace my_product |
| |
| int main() { |
| pw::bloat::BloatThisBinary(); |
| my_product::DoNanopbStuff(); |
| |
| // Ensure we are paying the cost for log and assert. |
| PW_CHECK_INT_GE(*unoptimizable, 0, "Ensure this CHECK logic stays"); |
| PW_LOG_INFO("We care about optimizing: %d", *unoptimizable); |
| |
| std::byte packet_buffer[128]; |
| pw::sys_io::ReadBytes(packet_buffer); |
| pw::sys_io::WriteBytes(packet_buffer); |
| |
| my_product::server.RegisterService(my_product::echo_service); |
| my_product::server.ProcessPacket(packet_buffer, my_product::output); |
| |
| return static_cast<int>(packet_buffer[92]); |
| } |