quic_post_write
quic_post_write(args->xso, actual_written > 0,
quic_post_write(xso, actual_written > 0, actual_written == len, flags, 1);
quic_post_write(xso, actual_written > 0, actual_written == actual_len,
quic_post_write(xso, *written > 0, *written == len, flags,
quic_post_write(ctx.xso, 0, 1, flags,
quic_post_write(ctx.xso, 1, 0, 0, qctx_should_autotick(&ctx));