test.cc

// Compile with: clang++ -o test -lkrb5 -pthread test.cc

#include <krb5/krb5.h>
#include <iostream>
#include <functional>
#include <atomic>
#include <cassert>
#include <unistd.h>
#include <thread>
#include <vector>

using namespace std;

int main(int argc, char** argv) {
  krb5_context ctx;
  int rc = krb5_init_context(&ctx);
  assert(rc == 0);
#ifdef DO_THROWAWAY_CALL
  char* junk = nullptr;
  krb5_get_default_realm(ctx, &junk);
  free(junk);
#endif
  atomic<int> state { 0 };
  vector<thread> threads;
  for (int i = 0; i < 10; i++) {
    threads.emplace_back([&]() {
      while (state == 0) {}
      while (state == 1) {
        krb5_principal princ;
        int rc = krb5_parse_name(ctx, "foo", &princ);
        if (rc != 0) {
          std::unique_ptr<const char, std::function<void(const char*)>> err_msg(
              krb5_get_error_message(ctx, rc),
              bind(krb5_free_error_message, ctx, std::placeholders::_1));
          cerr << "err: " << err_msg.get() << endl;
          abort();
        }
        krb5_free_principal(ctx, princ);
      }
    });
  }

  state = 1;
  sleep(1);
  state = 2;
  for (auto& t : threads) t.join();
  cout << "Success!" << endl;
  return 0;
}