apr_status_t h2_session_write(h2_session *session, apr_interval_time_t timeout) { apr_status_t status = APR_EAGAIN; h2_response *response = NULL; int have_written = 0; assert(session); /* Check that any pending window updates are sent. */ status = h2_session_update_windows(session); if (status == APR_SUCCESS) { have_written = 1; } else if (status != APR_EAGAIN) { return status; } /* If we have responses ready, submit them now. */ while ((response = h2_session_pop_response(session)) != NULL) { h2_stream *stream = h2_session_get_stream(session, response->stream_id); if (stream) { status = h2_session_handle_response(session, stream, response); have_written = 1; } h2_response_destroy(response); response = NULL; } h2_session_resume_streams_with_data(session); if (!have_written && timeout > 0 && !h2_session_want_write(session)) { status = h2_mplx_out_trywait(session->mplx, timeout, session->iowait); } h2_session_resume_streams_with_data(session); if (h2_session_want_write(session)) { status = APR_SUCCESS; int rv = nghttp2_session_send(session->ngh2); if (rv != 0) { ap_log_cerror( APLOG_MARK, APLOG_INFO, 0, session->c, "h2_session: send: %s", nghttp2_strerror(rv)); if (nghttp2_is_fatal(rv)) { h2_session_abort_int(session, rv); status = APR_ECONNABORTED; } } have_written = 1; } if (have_written) { h2_conn_io_flush(&session->io); } reap_zombies(session); return status; }
static void sigchld_handler(int /*signal_number*/) { reap_zombies(); /* Reinstall this signal handler ready for the next child. */ signal(SIGCHLD, sigchld_handler); }