| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package memory |
| |
| import "unsafe" |
| |
| func roundToPowerOf2(v, round int) int { |
| forceCarry := round - 1 |
| truncateMask := ^forceCarry |
| return (v + forceCarry) & truncateMask |
| } |
| |
| func roundUpToMultipleOf64(v int) int { |
| return roundToPowerOf2(v, 64) |
| } |
| |
| func isMultipleOfPowerOf2(v int, d int) bool { |
| return (v & (d - 1)) == 0 |
| } |
| |
| func addressOf(b []byte) uintptr { |
| return uintptr(unsafe.Pointer(&b[0])) |
| } |
