Function cuSignalExternalSemaphoresAsync 

pub unsafe fn cuSignalExternalSemaphoresAsync(
    extSemArray: *const *mut CUextSemaphore_st,
    paramsArray: *const CUDA_EXTERNAL_SEMAPHORE_SIGNAL_PARAMS_st,
    numExtSems: u32,
    stream: *mut CUstream_st,
) -> cudaError_enum