[PATCH 4/7] wined3d: Avoid using destroyed context.

[Henri Verbeet]

On 3 October 2016 at 00:38, Józef Kucia <jkucia at codeweavers.com> wrote:
> The swapchain can be destroyed by state_unbind_resources()
> if the only reference to a swapchain is kept by a shader resource view.
> This happens in d3d10core and d3d11 tests when a device is destroyed
> in test_swapchain_flip().
>
I think it may be harder to fix than this. If state_unbind_resources()
can end up destroying the (primary) swapchain, it's not safe to call
context_acquire() afterwards. Which means it's unsafe to unload
resources or even unload a different SRV. The reason destroying the
RTVs is currently safe, is that we unloaded resources earlier, so
releasing the references to the resources for those views shouldn't
acquire a context to destroy e.g. the GL texture again, but that's
already more fragile than I'd like. Perhaps we should just delay
destroying the context until leaving the last level.