event-active-issue-984.cpp

// https://github.com/libevent/libevent/issues/984

#include <event2/event.h>
#include <event2/event_struct.h>
#include <unistd.h>
#include <cassert>

int main()
{
  event_base* base = event_base_new();
  event *ev1, *ev2;
  int fd[2];
  bool closed = false;

  assert(!pipe(fd));

  ev1 = event_new(base, fd[0], EV_ET | EV_CLOSED,
      [](evutil_socket_t, short what, void* arg) -> void {
        bool* closed = static_cast<bool*>(arg);
        *closed = true;
        assert(what != EV_READ);
      },
      &closed);
  assert(ev1);
  event_add(ev1, nullptr);

  ev2 = event_new(base, fd[0], EV_ET | EV_READ,
      [](evutil_socket_t, short what, void* arg) -> void {
        assert(false);
      }, nullptr);
  assert(ev2);
  event_add(ev2, nullptr);

  close(fd[1]);

  event_base_loop(base, EVLOOP_NONBLOCK);
  assert(closed);

  event_free(ev1);
  event_free(ev2);
  event_base_free(base);
  return 0;
}