From: Giovanni Mascellani gmascellani@codeweavers.com
--- include/vkd3d.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/include/vkd3d.h b/include/vkd3d.h index f36d9043..3adce97b 100644 --- a/include/vkd3d.h +++ b/include/vkd3d.h @@ -207,7 +207,42 @@ VKD3D_API VkPhysicalDevice vkd3d_get_vk_physical_device(ID3D12Device *device); VKD3D_API struct vkd3d_instance *vkd3d_instance_from_device(ID3D12Device *device);
VKD3D_API uint32_t vkd3d_get_vk_queue_family_index(ID3D12CommandQueue *queue); + +/** + * Acquire the Vulkan queue backing a command queue. + * + * While a queue is acquired by the client, it is locked so that + * neither the vkd3d library nor other threads can submit work to + * it. For that reason it should be released as soon as possible with + * vkd3d_release_vk_queue(). The lock is not reentrant, so the same + * queue must not be acquired more than once by the same thread. + * + * Work submitted through the Direct3D 12 API exposed by vkd3d is not + * always immediately submitted to the Vulkan queue; sometimes it is + * kept in another internal queue, which might not necessarily be + * empty at the time vkd3d_acquire_vk_queue() is called. For this + * reason, work submitted directly to the Vulkan queue might appear to + * the Vulkan driver as being submitted before other work submitted + * though the Direct3D 12 API. If this is not desired, it is + * recommended to synchronize work submission using an ID3D12Fence + * object, by submitting to the queue a signal operation after all the + * Direct3D 12 work is submitted and waiting for it before calling + * vkd3d_acquire_vk_queue(). + * + * \since 1.0 + */ VKD3D_API VkQueue vkd3d_acquire_vk_queue(ID3D12CommandQueue *queue); + +/** + * Release the Vulkan queue backing a command queue. + * + * This must be paired to an earlier corresponding + * vkd3d_acquire_vk_queue(). After this function is called, the Vulkan + * queue returned by vkd3d_acquire_vk_queue() must not be used any + * more. + * + * \since 1.0 + */ VKD3D_API void vkd3d_release_vk_queue(ID3D12CommandQueue *queue);
VKD3D_API HRESULT vkd3d_create_image_resource(ID3D12Device *device,