Function ocl::ffi::clEnqueueReadBufferRect

pub unsafe extern "system" fn clEnqueueReadBufferRect(command_queue: *mut c_void,
                                                      buffer: *mut c_void,
                                                      blocking_read: u32,
                                                      buffer_origin: *const usize,
                                                      host_origin: *const usize,
                                                      region: *const usize,
                                                      buffer_row_pitch: usize,
                                                      buffer_slc_pitch: usize,
                                                      host_row_pitch: usize,
                                                      host_slc_pitch: usize,
                                                      ptr: *mut c_void,
                                                      num_events_in_wait_list: u32,
                                                      event_wait_list: *const *mut c_void,
                                                      event: *mut *mut c_void)
                                                      -> i32