Function opencl3::command_queue::enqueue_svm_free

pub fn enqueue_svm_free(
    command_queue: *mut c_void, 
    num_svm_pointers: u32, 
    svm_pointers: *const *const c_void, 
    pfn_free_func: Option<extern "C" fn(*mut c_void, u32, *const *const c_void, *mut c_void)>, 
    user_data: *mut c_void, 
    num_events_in_wait_list: u32, 
    event_wait_list: *const *mut c_void
) -> Result<*mut c_void, i32>