Function cusparseSpGEAM_nnz 

pub unsafe extern "C" fn cusparseSpGEAM_nnz(
    handle: cusparseHandle_t,
    opA: cusparseOperation_t,
    opB: cusparseOperation_t,
    alpha: *const c_void,
    matA: cusparseSpMatDescr_t,
    beta: *const c_void,
    matB: cusparseSpMatDescr_t,
    matC: cusparseSpMatDescr_t,
    computeType: cudaDataType,
    alg: cusparseSpGEAMAlg_t,
    spgeamDescr: cusparseSpGEAMDescr_t,
    externalBuffer: *mut c_void,
) -> cusparseStatus_t

This function computes the number of nonzero elements per row or column and the total number of nonzero elements in a dense matrix.

• This function requires temporary extra storage that is allocated internally.
• The routine supports asynchronous execution if the Stream Ordered Memory Allocator is available.
• The routine supports CUDA graph capture if the Stream Ordered Memory Allocator is available.