ASYNC_PROGRESS
if (!(async->async_flags & (ASYNC_BREAK|ASYNC_DELAY|ASYNC_PROGRESS))) {
async->async_flags &= ~ASYNC_PROGRESS;
async->async_flags &= ~ASYNC_PROGRESS;
async->async_flags |= ASYNC_PROGRESS;
async->async_flags |= ASYNC_PROGRESS;
async->async_flags |= ASYNC_PROGRESS;
if (!(async->async_flags & (ASYNC_BREAK|ASYNC_DELAY|ASYNC_PROGRESS))) {
async->async_flags &= ~ASYNC_PROGRESS;
async->async_flags &= ~ASYNC_PROGRESS;
async->async_flags |= ASYNC_PROGRESS;
async->async_flags |= ASYNC_PROGRESS;
async->async_flags |= ASYNC_PROGRESS;