| 44 | uint32_t _n = 0; // # of events to submit |
| 45 | |
| 46 | int init() { |
| 47 | if (_kq >= 0) |
| 48 | LOG_ERROR_RETURN(EALREADY, -1, "already init-ed"); |
| 49 | |
| 50 | _kq = kqueue(); |
| 51 | if (_kq < 0) |
| 52 | LOG_ERRNO_RETURN(0, -1, "failed to create kqueue()"); |
| 53 | |
| 54 | LOG_DEBUG("kqueue_fd = ", _kq); |
| 55 | if (enqueue(_kq, EVFILT_USER, EV_ADD | EV_CLEAR, 0, nullptr, true) < 0) { |
| 56 | DEFER({ close(_kq); _kq = -1; }); |
| 57 | LOG_ERRNO_RETURN(0, -1, "failed to setup self-wakeup EVFILT_USER event by kevent()"); |
| 58 | } |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | int reset() override { |
| 63 | LOG_INFO("Reset event engine: kqueue"); |