static void init_async(h2o_multithread_queue_t *queue, h2o_loop_t *loop)
{
#if defined(__linux__)
/**
* The kernel overhead of an eventfd file descriptor is
* much lower than that of a pipe, and only one file descriptor is required
*/
int fd;
fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
if (fd == -1) {
perror("eventfd");
abort();
}
queue->async.write = fd;
queue->async.read = h2o_evloop_socket_create(loop, fd, 0);
#else
int fds[2];
if (cloexec_pipe(fds) != 0) {
perror("pipe");
abort();
}
fcntl(fds[1], F_SETFL, O_NONBLOCK);
queue->async.write = fds[1];
queue->async.read = h2o_evloop_socket_create(loop, fds[0], 0);
#endif
queue->async.read->data = queue;
h2o_socket_read_start(queue->async.read, on_read);
}
static void init_async(h2o_multithread_queue_t *queue, h2o_loop_t *loop)
{
int fds[2];
if (cloexec_pipe(fds) != 0) {
perror("pipe");
abort();
}
fcntl(fds[1], F_SETFL, O_NONBLOCK);
queue->async.write = fds[1];
queue->async.read = h2o_evloop_socket_create(loop, fds[0], 0);
queue->async.read->data = queue;
h2o_socket_read_start(queue->async.read, on_read);
}