process.h

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#pragma once
 
#include <chrono>
#include <cstdint>
#include <expected>
#include <filesystem>
#include <string>
 
 
namespace mm::auto_tuning {
 
constexpr std::uint16_t kDefaultPort = 63528;
 
std::filesystem::path defaultBinaryName();
 
struct ProcessOptions {
  std::filesystem::path binary;
  std::uint16_t port = kDefaultPort;
  std::filesystem::path logFile;
  std::chrono::milliseconds startTimeout{30000};
};
 
class Process {
 public:
  explicit Process(ProcessOptions options);
 
  ~Process();
 
  Process(const Process&) = delete;
  Process& operator=(const Process&) = delete;
  Process(Process&&) = delete;
  Process& operator=(Process&&) = delete;
 
  std::expected<void, std::string> start();
 
  enum class StopOutcome {
    NotRunning,  
    Requested,   
    Signalled,   
    Killed,      
  };
 
  StopOutcome stop();
 
  const std::string& version() const { return version_; }
 
  std::string baseUrl() const;
 
  const ProcessOptions& options() const { return options_; }
 
  std::int64_t pid() const { return pid_; }
 
 private:
  void forget();
 
  ProcessOptions options_;
  std::int64_t pid_ = 0;
  std::intptr_t handle_ = 0;
  std::intptr_t group_ = 0;
  std::string version_;
};
 
}  // namespace mm::auto_tuning