如何使用'exception_ptr”在 C 线程之间传播异常？

<code class="cpp">#include <iostream>
#include <thread>
#include <exception>
#include <stdexcept>

static std::exception_ptr eptr;

void worker() {
  try {
    // Simulated CPU-intensive work with a delay
    std::this_thread::sleep_for(std::chrono::seconds(1));
    throw std::runtime_error("Exception in worker thread");
  } catch (...) {
    eptr = std::current_exception();
  }
}

int main() {
  // Create a worker thread
  std::thread workerThread(worker);
  workerThread.join();

  // Check if an exception occurred on the worker thread
  if (eptr) {
    try {
      // Rethrow the exception on the main thread
      std::rethrow_exception(eptr);
    } catch (const std::exception &ex) {
      // Handle the exception on the main thread
      std::cerr << "Worker thread exited with exception: " << ex.what() << "\n";
    }
  }

  return 0;
}</code>