IDMLDevice::CreateBindingTable method (directml.h)

Creates a binding table, which is an object that can be used to bind resources (such as tensors) to the pipeline.

The binding table wraps a range of an application-managed descriptor heap using the provided descriptor handles and count. Binding tables are used by DirectML to manage the binding of resources by writing descriptors into the descriptor heap at the offset specified by the CPUDescriptorHandle, and binding those descriptors to the pipeline using the descriptors at the offset specified by the GPUDescriptorHandle. The order in which DirectML writes descriptors into the heap is unspecified, so your application must take care not to overwrite the descriptors wrapped by the binding table.

The supplied CPU and GPU descriptor handles may come from different heaps, however it is then your application's responsibility to ensure that the entire descriptor range referred to by the CPU descriptor handle is copied into the range referred to by the GPU descriptor handle prior to execution using this binding table.

The descriptor heap from which the handles are supplied must have type D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV. Additionally, the heap referred to by the GPUDescriptorHandle must be a shader-visible descriptor heap.

You must not delete the heap referred to by the GPU descriptor handle until all work referencing it has completed execution on the GPU. You may, however, reset or release the binding table itself as soon as the dispatch has been recorded into the command list. Similar to the relationship between ID3D12CommandList and ID3D12CommandAllocator, the IDMLBindingTable doesn't own the underlying memory referenced by the descriptor handles. Rather, the ID3D12DescriptorHeap does. Therefore, you're permitted to reset or release a DirectML binding table before work using the binding table has completed execution on the GPU.

Syntax

HRESULT CreateBindingTable(
  [in, optional] const DML_BINDING_TABLE_DESC *desc,
                 REFIID                       riid,
  [out]          void                         **ppv
);

Parameters

[in, optional] desc

Type: const DML_BINDING_TABLE_DESC*

An optional pointer to a DML_BINDING_TABLE_DESC containing the binding table parameters. This may be nullptr, indicating an empty binding table.

riid

Type: REFIID

A reference to the globally unique identifier (GUID) of the interface that you wish to be returned in ppv. This is expected to be the GUID of IDMLBindingTable.

[out] ppv

Type: void**

A pointer to a memory block that receives a pointer to the binding table. This is the address of a pointer to an IDMLBindingTable, representing the binding table created.

Return value

Type: HRESULT

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Requirements

Requirement	Value
Target Platform	Windows
Header	directml.h
Library	DirectML.lib
DLL	DirectML.dll

See also

Binding in DirectML

IDMLDevice