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https://fuchsia.googlesource.com/third_party/pigweed.googlesource.com/pigweed/pigweed
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e39af8d8da
This adds an channel output wrapper which synchronizes a ChannelOutput's operations with a sync::Mutex, and updates the host target's system RPC server to use it. Change-Id: I3d2407a8c81a8f0370fd714ded850293d7030209 Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/28540 Commit-Queue: Alexei Frolov <frolv@google.com> Reviewed-by: Wyatt Hepler <hepler@google.com> Reviewed-by: Keir Mierle <keir@google.com> Reviewed-by: Ewout van Bekkum <ewout@google.com>
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
// Copyright 2020 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include <cstddef>
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#include <cstdint>
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#include "pw_hdlc_lite/rpc_channel.h"
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#include "pw_hdlc_lite/rpc_packets.h"
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#include "pw_log/log.h"
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#include "pw_rpc/synchronized_channel_output.h"
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#include "pw_rpc_system_server/rpc_server.h"
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#include "pw_stream/socket_stream.h"
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namespace pw::rpc::system_server {
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namespace {
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constexpr size_t kMaxTransmissionUnit = 256;
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constexpr uint16_t kSocketPort = 33000;
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stream::SocketStream socket_stream;
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sync::Mutex channel_output_mutex;
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rpc::SynchronizedChannelOutput<
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hdlc_lite::RpcChannelOutputBuffer<kMaxTransmissionUnit>>
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hdlc_channel_output(channel_output_mutex,
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socket_stream,
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hdlc_lite::kDefaultRpcAddress,
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"HDLC channel");
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Channel channels[] = {rpc::Channel::Create<1>(&hdlc_channel_output)};
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rpc::Server server(channels);
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} // namespace
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void Init() {
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log_basic::SetOutput([](std::string_view log) {
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hdlc_lite::WriteUIFrame(1, std::as_bytes(std::span(log)), socket_stream);
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});
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socket_stream.Init(kSocketPort);
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}
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rpc::Server& Server() { return server; }
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Status Start() {
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// Declare a buffer for decoding incoming HDLC frames.
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std::array<std::byte, kMaxTransmissionUnit> input_buffer;
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hdlc_lite::Decoder decoder(input_buffer);
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while (true) {
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std::array<std::byte, kMaxTransmissionUnit> data;
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auto ret_val = socket_stream.Read(data);
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if (ret_val.ok()) {
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for (std::byte byte : ret_val.value()) {
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if (auto result = decoder.Process(byte); result.ok()) {
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hdlc_lite::Frame& frame = result.value();
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if (frame.address() == hdlc_lite::kDefaultRpcAddress) {
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server.ProcessPacket(frame.data(), hdlc_channel_output);
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}
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}
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}
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}
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}
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}
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} // namespace pw::rpc::system_server
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