LCOV - code coverage report
Current view: top level - wirestead/transport/tcp_client - tcp_client.hpp (source / functions) Coverage Total Hit
Test: Wirestead Coverage Report Lines: 100.0 % 1 1
Test Date: 2026-10-29 11:36:05 Functions: 100.0 % 1 1
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : /*
       2                 :             :  * Copyright 2025 Jinwoo Sung
       3                 :             :  *
       4                 :             :  * Licensed under the Apache License, Version 2.0 (the "License");
       5                 :             :  * you may not use this file except in compliance with the License.
       6                 :             :  * You may obtain a copy of the License at
       7                 :             :  *
       8                 :             :  *     http://www.apache.org/licenses/LICENSE-2.0
       9                 :             :  *
      10                 :             :  * Unless required by applicable law or agreed to in writing, software
      11                 :             :  * distributed under the License is distributed on an "AS IS" BASIS,
      12                 :             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      13                 :             :  * See the License for the specific language governing permissions and
      14                 :             :  * limitations under the License.
      15                 :             :  */
      16                 :             : 
      17                 :             : #pragma once
      18                 :             : 
      19                 :             : #include <cstdint>
      20                 :             : #include <memory>
      21                 :             : #include <optional>
      22                 :             : #include <string>
      23                 :             : #include <variant>
      24                 :             : #include <vector>
      25                 :             : 
      26                 :             : #include "wirestead/base/constants.hpp"
      27                 :             : #include "wirestead/base/platform.hpp"
      28                 :             : #include "wirestead/base/visibility.hpp"
      29                 :             : #include "wirestead/config/tcp_client_config.hpp"
      30                 :             : #include "wirestead/diagnostics/error_types.hpp"
      31                 :             : #include "wirestead/interface/result_channel.hpp"
      32                 :             : #include "wirestead/memory/memory_pool.hpp"
      33                 :             : #include "wirestead/transport/base/reconnect_policy.hpp"
      34                 :             : #include "wirestead/wrapper/send_result.hpp"
      35                 :             : 
      36                 :             : // Forward declare boost components
      37                 :             : namespace boost {
      38                 :             : namespace asio {
      39                 :             : class io_context;
      40                 :             : }
      41                 :             : }  // namespace boost
      42                 :             : 
      43                 :             : namespace wirestead {
      44                 :             : namespace wrapper {
      45                 :             : class TcpClient;
      46                 :             : }  // namespace wrapper
      47                 :             : namespace transport {
      48                 :             : namespace detail {
      49                 :             : struct TcpWriteWait;
      50                 :             : }
      51                 :             : 
      52                 :             : using base::LinkState;
      53                 :             : using config::TcpClientConfig;
      54                 :             : using interface::Channel;
      55                 :             : 
      56                 :             : // Use static create() helpers to construct safely
      57                 :             : class WIRESTEAD_API TcpClient : public interface::ResultChannel, public std::enable_shared_from_this<TcpClient> {
      58                 :             :  public:
      59                 :             :   using BufferVariant =
      60                 :             :       std::variant<memory::PooledBuffer, std::vector<uint8_t>, std::shared_ptr<const std::vector<uint8_t>>>;
      61                 :             : 
      62                 :             :   static std::shared_ptr<TcpClient> create(const TcpClientConfig& cfg);
      63                 :             :   static std::shared_ptr<TcpClient> create(const TcpClientConfig& cfg, boost::asio::io_context& ioc);
      64                 :             :   ~TcpClient() override;
      65                 :             : 
      66                 :             :   // Move semantics
      67                 :             :   TcpClient(TcpClient&&) noexcept;
      68                 :             :   TcpClient& operator=(TcpClient&&) noexcept;
      69                 :             : 
      70                 :             :   // Disable copy (should be already disabled by unique_ptr, but being explicit)
      71                 :             :   TcpClient(const TcpClient&) = delete;
      72                 :             :   TcpClient& operator=(const TcpClient&) = delete;
      73                 :             : 
      74                 :             :   void start() override;
      75                 :             :   void stop() override;
      76                 :             :   bool is_connected() const override;
      77                 :             :   bool is_backpressure_active() const override;
      78                 :             :   std::optional<size_t> write_queue_limit() const override;
      79                 :             :   wrapper::RuntimeStats stats() const override;
      80                 :             :   void reset_stats() override;
      81                 :             :   boost::asio::any_io_executor get_executor() override;
      82                 :             : 
      83                 :             :   [[nodiscard]] wrapper::SendResult async_write_copy_result(memory::ConstByteSpan data) override;
      84                 :             :   [[nodiscard]] wrapper::SendResult async_write_move_result(std::vector<uint8_t>&& data) override;
      85                 :             :   [[nodiscard]] wrapper::SendResult async_write_shared_result(
      86                 :             :       std::shared_ptr<const std::vector<uint8_t>> data) override;
      87                 :             :   [[nodiscard]] wrapper::SendResult async_try_write_copy_result(memory::ConstByteSpan data) override;
      88                 :             :   [[nodiscard]] wrapper::SendResult async_try_write_move_result(std::vector<uint8_t>&& data) override;
      89                 :             :   [[nodiscard]] wrapper::SendResult async_try_write_shared_result(
      90                 :             :       std::shared_ptr<const std::vector<uint8_t>> data) override;
      91                 :             : 
      92                 :             :   // Thread-safe: may be called at any time, including after start(). Each
      93                 :             :   // setter takes effect for subsequent operations (callback replacement is
      94                 :             :   // synchronized against concurrent reads on the io thread; see #436).
      95                 :             :   void on_bytes(OnBytes cb) override;
      96                 :             :   void on_state(OnState cb) override;
      97                 :             :   void on_backpressure(OnBackpressure cb) override;
      98                 :             : 
      99                 :             :   std::optional<diagnostics::ErrorInfo> last_error_info() const override;
     100                 :             : 
     101                 :             :   // Dynamic configuration methods. Thread-safe; take effect for the next
     102                 :             :   // reconnect/idle-timeout decision, not retroactively for one already in
     103                 :             :   // flight.
     104                 :             :   void set_backpressure_strategy(base::constants::BackpressureStrategy strategy);
     105                 :             :   void set_retry_interval(unsigned interval_ms);
     106                 :             :   void set_max_retries(int max_retries);
     107                 :             :   void set_connection_timeout(unsigned timeout_ms);
     108                 :             :   void set_idle_timeout(unsigned timeout_ms);
     109                 :             :   void set_idle_timeout_action(IdleTimeoutAction action);
     110                 :             :   void set_reconnect_policy(ReconnectPolicy policy);
     111                 :             : 
     112                 :             :  private:
     113                 :             :   // The built-in wrapper pins capacity waits without extending Channel's ABI.
     114                 :             :   friend class wrapper::TcpClient;
     115                 :             :   void fail_receive();
     116                 :             :   std::optional<uint64_t> write_connection() const;
     117                 :             :   std::shared_ptr<detail::TcpWriteWait> capture_write_wait() const;
     118                 :             :   std::optional<wrapper::SendResult> poll_write_wait(const std::shared_ptr<detail::TcpWriteWait>& wait) const;
     119                 :             :   void cancel_write_waits();
     120                 :             :   wrapper::SendResult write_state();
     121                 :             :   // Native admission only: wrapper lifecycle, validation precedence and
     122                 :             :   // strategy-level reason mapping remain the wrapper's responsibility.
     123                 :             :   wrapper::SendResult write_copy(memory::ConstByteSpan data, std::optional<uint64_t> expected_connection);
     124                 :             :   wrapper::SendResult write_move(std::vector<uint8_t>&& data, std::optional<uint64_t> expected_connection);
     125                 :             :   wrapper::SendResult write_shared(std::shared_ptr<const std::vector<uint8_t>> data,
     126                 :             :                                    std::optional<uint64_t> expected_connection);
     127                 :             : 
     128                 :             :   wrapper::SendResult try_write_copy(memory::ConstByteSpan data);
     129                 :             :   wrapper::SendResult try_write_move(std::vector<uint8_t>&& data);
     130                 :             :   wrapper::SendResult try_write_shared(std::shared_ptr<const std::vector<uint8_t>> data);
     131                 :             : 
     132                 :             :   explicit TcpClient(const TcpClientConfig& cfg);
     133                 :             :   explicit TcpClient(const TcpClientConfig& cfg, boost::asio::io_context& ioc);
     134                 :             : 
     135                 :             :   struct Impl;
     136                 :        5661 :   const Impl* get_impl() const { return impl_.get(); }
     137                 :             :   Impl* get_impl() { return impl_.get(); }
     138                 :             :   std::unique_ptr<Impl> impl_;
     139                 :             : };
     140                 :             : }  // namespace transport
     141                 :             : }  // namespace wirestead
        

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