D3D11-backed fence (timeline semaphore) creation routine. More...

#include "xrt/xrt_compositor.h"
#include <Unknwn.h>
#include <d3d11_4.h>
#include <wil/com.h>
#include <chrono>

Include dependency graph for d3d_d3d11_fence.hpp:

Functions
xrt_result_t	xrt::auxiliary::d3d::d3d11::createSharedFence (ID3D11Device5 &device, bool share_cross_adapter, xrt_graphics_sync_handle_t *out_handle, wil::com_ptr< ID3D11Fence > &out_d3dfence)
	Allocate a fence (ID3D11Fence) that has a corresponding native handle. More...

xrt_result_t	xrt::auxiliary::d3d::d3d11::waitOnFenceWithTimeout (wil::com_ptr< ID3D11Fence > fence, wil::unique_event_nothrow &event, uint64_t value, std::chrono::milliseconds timeout_ms)
	Wait for a fence to be signaled with value equal or greater than `value` within `timeout_ns` nanoseconds. More...

Detailed Description

D3D11-backed fence (timeline semaphore) creation routine.

Author: Rylie Pavlik rylie.nosp@m..pav.nosp@m.lik@c.nosp@m.olla.nosp@m.bora..nosp@m.com

Function Documentation

xrt_result_t xrt::auxiliary::d3d::d3d11::createSharedFence	(	ID3D11Device5 &	device,
		bool	share_cross_adapter,
		xrt_graphics_sync_handle_t *	out_handle,
		wil::com_ptr< ID3D11Fence > &	out_d3dfence
	)

Allocate a fence (ID3D11Fence) that has a corresponding native handle.

D3D fences are roughly equivalent to Vulkan timeline semaphores.

Parameters

	device	A D3D device to allocate with.
	share_cross_adapter	True if the fence should be shared across adapters, not only across ID3D11Device instances.
[out]	out_handle	A graphics sync handle to populate
[out]	out_d3dfence	A COM pointer to the D3D11 fence to populate

Returns

xrt_result_t, one of:

xrt_result_t xrt::auxiliary::d3d::d3d11::waitOnFenceWithTimeout	(	wil::com_ptr< ID3D11Fence >	fence,
		wil::unique_event_nothrow &	event,
		uint64_t	value,
		std::chrono::milliseconds	timeout_ms
	)

Wait for a fence to be signaled with value equal or greater than value within timeout_ns nanoseconds.

Parameters

fence	The fence to wait on.
event	An event to use to wait. Please use a dedicated event for a single thread's calls to this function.
value	The desired fence value
timeout_ms	After this long, we may return early with XRT_TIMEOUT even before the fence reaches the value.