Function cuGraphGetRootNodes

pub unsafe extern "C" fn cuGraphGetRootNodes(
    hGraph: CUgraph,
    rootNodes: *mut CUgraphNode,
    numRootNodes: *mut usize,
) -> CUresult

\brief Returns a graph’s root nodes

Returns a list of \p hGraph’s root nodes. \p rootNodes may be NULL, in which case this function will return the number of root nodes in \p numRootNodes. Otherwise, \p numRootNodes entries will be filled in. If \p numRootNodes is higher than the actual number of root nodes, the remaining entries in \p rootNodes will be set to NULL, and the number of nodes actually obtained will be returned in \p numRootNodes.

\param hGraph - Graph to query \param rootNodes - Pointer to return the root nodes \param numRootNodes - See description

\return ::CUDA_SUCCESS, ::CUDA_ERROR_DEINITIALIZED, ::CUDA_ERROR_NOT_INITIALIZED, ::CUDA_ERROR_INVALID_VALUE \note_graph_thread_safety \notefnerr

\sa ::cuGraphCreate, ::cuGraphGetNodes, ::cuGraphGetEdges, ::cuGraphNodeGetType, ::cuGraphNodeGetDependencies, ::cuGraphNodeGetDependentNodes