Golang fdb_future_get_key Examples

Example #1

File: futures.go Project: ptomasroos/fdb-go

func (f *futureKey) Get() (Key, error) {
	f.o.Do(func() {
		var value *C.uint8_t
		var length C.int

		f.BlockUntilReady()

		if err := C.fdb_future_get_key(f.ptr, &value, &length); err != 0 {
			f.e = Error{int(err)}
		} else {
			f.k = C.GoBytes(unsafe.Pointer(value), length)
		}

		C.fdb_future_release_memory(f.ptr)
	})

	return f.k, f.e
}

Example #2

File: futures.go Project: rayleyva/fdb-go

// GetWithError returns a database key or an error if the asynchronous operation
// associated with this future did not successfully complete. The current
// goroutine will be blocked until the future is ready.
func (f FutureKey) GetWithError() (Key, error) {
	if f.k != nil {
		return f.k, nil
	}

	var value *C.uint8_t
	var length C.int

	fdb_future_block_until_ready(f.ptr)
	if err := C.fdb_future_get_key(f.ptr, &value, &length); err != 0 {
		if err == 2017 {
			return f.k, nil
		} else {
			return nil, Error(err)
		}
	}

	f.k = C.GoBytes(unsafe.Pointer(value), length)

	C.fdb_future_release_memory(f.ptr)

	return f.k, nil
}