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# Date Author Comment
175b2a6e 03/14/2012 11:22 pm Corentin Chary

vnc: don't mess up with iohandlers in the vnc thread

The threaded VNC servers messed up with QEMU fd handlers without
any kind of locking, and that can cause some nasty race conditions.

Using qemu_mutex_lock_iothread() won't work because vnc_dpy_cpy(),
which will wait for the current job queue to finish, can be called with...
cf218714 12/13/2011 01:06 am Jan Kiszka

qemu-thread: add API for joinable threads

Split from Jan's original qemu-thread-posix.c patch. No semantic change,
just introduce the new API that POSIX and Win32 implementations will
conform to.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Paolo Bonzini <>...
7267c094 08/21/2011 07:01 am Anthony Liguori

Use glib memory allocation and free functions

qemu_malloc/qemu_free no longer exist after this commit.

Signed-off-by: Anthony Liguori <>
b7680cb6 03/13/2011 04:44 pm Jan Kiszka

Refactor thread retrieval and check

We have qemu_cpu_self and qemu_thread_self. The latter is retrieving the
current thread, the former is checking for equality (using CPUState). We
also have qemu_thread_equal which is only used like qemu_cpu_self.

This refactors the interfaces, creating qemu_cpu_is_self and...
c53af37f 02/26/2011 12:04 am Corentin Chary

vnc: fix a memory leak in threaded vnc server

VncJobQueue's buffer is intended to be used for
as the output buffer for all operations in this queue,
but unfortunatly.

vnc_async_encoding_start() is in charge of setting this
buffer as the current output buffer, but...
7d964c9d 02/24/2011 12:28 am Corentin Chary

vnc: refresh lossy rect after a given timeout

If an adaptive encoding has choosen to send a lossy update
based on the result of vnc_update_freq(), then it should advertise
it with vnc_sent_lossy_rect(). This will allow to automatically refresh
this rect once it's static again....
148954fa 02/24/2011 12:28 am Corentin Chary

vnc: Add ZRLE and ZYWRLE encodings.

Add ZRLE [1] and ZYWRLE [2] encodings. The code is inspire^W stolen
from libvncserver (again), but have been rewriten to match QEMU coding
style.

[1] http://www.realvnc.com/docs/rfbproto.pdf
[2] http://micro-vnc.jp/research/remote_desktop_ng/ZYWRLE/publications/...
73eb4c04 02/04/2011 02:33 pm Corentin Chary

vnc: qemu can die if the client is disconnected while updating screen

agraf reported that qemu_mutex_destroy(vs->output_mutex) while failing
in vnc_disconnect_finish().

It's because vnc_worker_thread_loop() tries to unlock the mutex while
not locked. The unlocking call doesn't fail (pthread bug ?), but...
bd023f95 07/27/2010 01:36 am Corentin Chary

vnc: threaded VNC server

Implement a threaded VNC server using the producer-consumer model.
The main thread will push encoding jobs (a list a rectangles to update)
in a queue, and the VNC worker thread will consume that queue and send
framebuffer updates to the output buffer....