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))
}
}
// 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
}
}