Function cusolverDnXsyevBatched_bufferSize 

pub unsafe extern "C" fn cusolverDnXsyevBatched_bufferSize(
    handle: cusolverDnHandle_t,
    params: cusolverDnParams_t,
    jobz: cusolverEigMode_t,
    uplo: cublasFillMode_t,
    n: i64,
    dataTypeA: cudaDataType,
    A: *const c_void,
    lda: i64,
    dataTypeW: cudaDataType,
    W: *const c_void,
    computeType: cudaDataType,
    workspaceInBytesOnDevice: *mut size_t,
    workspaceInBytesOnHost: *mut size_t,
    batchSize: i64,
) -> cusolverStatus_t