Function cutensorEstimateWorkspaceSize 

pub unsafe extern "C" fn cutensorEstimateWorkspaceSize(
    handle: cutensorHandle_t,
    desc: cutensorOperationDescriptor_t,
    planPref: cutensorPlanPreference_t,
    workspacePref: cutensorWorksizePreference_t,
    workspaceSizeEstimate: *mut u64,
) -> cutensorStatus_t

Determines the required workspaceSize for the given operation encoded by desc.

Parameters

• handle: Opaque handle holding cuTENSOR’s library context.
• desc: This opaque struct encodes the operation.
• planPref: This opaque struct restricts the space of viable candidates.
• workspacePref: This parameter influences the size of the workspace; see cutensorWorksizePreference_t for details.
• workspaceSizeEstimate: The workspace size (in bytes) that is required for the given operation.

Return value

• cutensorStatus_t::CUTENSOR_STATUS_INVALID_VALUE: if some input data is invalid (this typically indicates an user error).
• cutensorStatus_t::CUTENSOR_STATUS_NOT_INITIALIZED: if the handle is not initialized.
• cutensorStatus_t::CUTENSOR_STATUS_SUCCESS: The operation completed successfully.