Function win_io_once

src/daemon/ipc.c:5724–5750

}

static int win_io_once(cbm_daemon_ipc_connection_t *connection, void *buffer, DWORD length,
                       bool writing, uint64_t deadline_ms, DWORD *transferred_out) {
    OVERLAPPED overlapped;
    memset(&overlapped, 0, sizeof(overlapped));
    overlapped.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
    if (!overlapped.hEvent) {
        return -1;
    }
    DWORD transferred = 0;
    BOOL completed = writing
                         ? WriteFile(connection->handle, buffer, length, &transferred, &overlapped)
                         : ReadFile(connection->handle, buffer, length, &transferred, &overlapped);
    int result = 1;
    if (!completed) {
        if (GetLastError() != ERROR_IO_PENDING) {
            result = -1;
        } else {
            result = win_overlapped_wait(connection->handle, &overlapped,
                                         win_deadline_remaining(deadline_ms), &transferred);
        }
    }
    (void)CloseHandle(overlapped.hEvent);
    if (result == 1) {
        *transferred_out = transferred;
    }
    return result;
}

static int connection_read_full(cbm_daemon_ipc_connection_t *connection, void *buffer,
                                size_t length, uint64_t deadline_ms) {