task_error.hpp

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#pragma once
 
#include <chrono>
#include <exception>
#include <functional>
#include <string>
#include <thread>
#include <utility>
 
namespace threadschedule
{
 
struct task_error
{
  std::exception_ptr exception;
  std::string task_description;
  std::thread::id std_id;
  std::chrono::steady_clock::time_point timestamp;
 
  [[nodiscard]] static auto
  capture(std::string description = {}) -> task_error
  {
    return { std::current_exception(), std::move(description), std::this_thread::get_id(),
             std::chrono::steady_clock::now() };
  }
 
  [[nodiscard]] auto
  what() const -> std::string
  {
    try
      {
        if (exception)
          std::rethrow_exception(exception);
      }
    catch (std::exception const& error)
      {
        return error.what();
      }
    catch (...)
      {
        return "Unknown exception";
      }
    return "No exception";
  }
 
  void
  rethrow() const
  {
    if (exception)
      std::rethrow_exception(exception);
  }
};
 
using error_callback = std::function<void(task_error const&)>;
 
} // namespace threadschedule