Re: [Qemu-devel] Guest application reading from pl011 without device driver

[Paolo Bonzini]

On 23/03/2017 11:12, Jiahuan Zhang wrote:
> 
>     It's Windows that doesn't support it (the Windows function name is
>     WaitForSingleObject).
> 
> 
> Hi, I have checked the Windows chardev implimentation in QEMU.
> I learned from char-win-stdio.c to using thread and WaitForSingleObject
> for interlocking.
> char-win-stdio.c uses qemu_add_wait_object().
> Char-pipe.c uses qemu_add_polling_cb().
> I found all over qemu, only char-pipe uses qemu_add_polling_cb().
> Does this mean that somebody has already looked into this issue,
> and failed in using qemu_add_wait_object(),
> and then he/she created qemu_add_polling_cb()?

I don't know, but using threads sounds like a way to solve the bug, indeed.

Thanks,

Paolo