| // 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 internal |
| |
| import ( |
| "sync/atomic" |
| "time" |
| ) |
| |
| // TimestampMillis return a time unix nano. |
| func TimestampMillis(t time.Time) uint64 { |
| return uint64(t.UnixNano()) / uint64(time.Millisecond) |
| } |
| |
| // GetAndAdd perform atomic read and update |
| func GetAndAdd(n *uint64, diff uint64) uint64 { |
| for { |
| v := *n |
| if atomic.CompareAndSwapUint64(n, v, v+diff) { |
| return v |
| } |
| } |
| } |
