コード例 #1
0
ファイル: striper.go プロジェクト: wenjianhn/radoshttpd
func (sp *StriperPool) Read(oid string, data []byte, offset uint64) (int, error) {
	if len(data) == 0 {
		return 0, nil
	}

	c_oid := C.CString(oid)
	defer C.free(unsafe.Pointer(c_oid))

	ret := C.rados_striper_read(sp.striper, c_oid,
		(*C.char)(unsafe.Pointer(&data[0])),
		C.size_t(len(data)),
		C.uint64_t(offset))
	if ret >= 0 {
		return int(ret), nil
	} else {
		return 0, RadosError(int(ret))
	}

}
コード例 #2
0
// Read data from a striped object
func (rso *RadosStripedObject) Read(p []byte) (n int, err error) {
	obj := C.CString(rso.ObjectName)
	defer C.free(unsafe.Pointer(obj))

	ret := C.rados_striper_read(rso.Striper, obj,
		(*C.char)(unsafe.Pointer(&p[0])), C.size_t(len(p)),
		C.uint64_t(rso.Read_offset))
	if ret < 0 {
		return int(ret), errors.New("read failed")
	} else {
		// update offset value for next read
		rso.Read_offset = rso.Read_offset + int64(ret)

		// if actual read was less than buffer size than reached end of object
		if int(ret) < len(p) {
			err = io.EOF
		} else {
			err = nil
		}
		return int(ret), err
	}
}