[PATCH v2 0/1] MR10324: Draft: win32u: Fix deadlock when setting hdc_src to the window's self DC.

[Zhao Yi (＠Zhaoyi)]

Supersed !9180 and !9177

When hdc_src is the window's self DC, Within the NtUserUpdateLayeredWindow function, there exists the following call sequence: window_surface_lock()-\>NtGdiAlphaBlend()-\>window_surface_unlock(). However, the implementation of the NtGdiAlphaBlend() function calls the windrv_GetImage() function, which internally invokes lock_surface() and unlock_surface(). In this situation, window_surface_lock() is called first to acquire a lock. When lock_surface() is subsequently called to acquire the same lock, the initial lock has not yet been released, ultimately resulting in a deadlock.

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  v2: win32u: Fix deadlock when setting hdc_src to the window's self DC.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10324