[PATCH 0/1] MR7025: winex11: Sync gl drawable outside of the win_data mutex.

[Rémi Bernon (＠rbernon)]

Some thread might be destroying a window, calling destroy_client_window
from release_gl_drawable, holding the GL context mutex and trying to
enter the win_data mutex.

At the same time, another thread might be moving its window, calling
sync_gl_drawable from X11DRV_WindowPosChanged, holding the win_data
mutex and trying to enter the GL context mutex.

The deadlock was present before already, although less frequently
triggered as sync_gl_drawable was done conditionally if the client
window has been moved.

This triggers now more frequently in the dxgi:dxgi tests.

[PATCH 1/1] winex11: Sync gl drawable outside of the win_data mutex.

[Rémi Bernon]

From: Rémi Bernon

Some thread might be destroying a window, calling destroy_client_window
from release_gl_drawable, holding the GL context mutex and trying to
enter the win_data mutex.

At the same time, another thread might be moving its window, calling
sync_gl_drawable from X11DRV_WindowPosChanged, holding the win_data
mutex and trying to enter the GL context mutex.

The deadlock was present before already, although less frequently
triggered as sync_gl_drawable was done conditionally if the client
window has been moved.

This triggers now more frequently in the dxgi:dxgi tests.
---
 dlls/winex11.drv/window.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/winex11.drv/window.c b/dlls/winex11.drv/window.c
index d109d6a744e..bf415f19cb9 100644
--- a/dlls/winex11.drv/window.c
+++ b/dlls/winex11.drv/window.c
@@ -2932,6 +2932,8 @@ void X11DRV_WindowPosChanged( HWND hwnd, HWND insert_after, HWND owner_hint, UIN
     struct window_rects old_rects;
     BOOL was_fullscreen;

+    sync_gl_drawable( hwnd, FALSE );
+
     if (!(data = get_win_data( hwnd ))) return;

old_style = new_style & ~(WS_VISIBLE | WS_MINIMIZE | WS_MAXIMIZE);
@@ -2950,7 +2952,6 @@ void X11DRV_WindowPosChanged( HWND hwnd, HWND insert_after, HWND owner_hint, UIN
     XFlush( gdi_display );  /* make sure painting is done before we move the window */

sync_client_position( data, &old_rects );
-    sync_gl_drawable( hwnd, FALSE );

if (!data->whole_window)
     {