1 // Copyright 2015 The etcd Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package v2store 16 17 type eventQueue struct { 18 Events []*Event 19 Size int 20 Front int 21 Back int 22 Capacity int 23 } 24 25 func (eq *eventQueue) insert(e *Event) { 26 eq.Events[eq.Back] = e 27 eq.Back = (eq.Back + 1) % eq.Capacity 28 29 if eq.Size == eq.Capacity { //dequeue 30 eq.Front = (eq.Front + 1) % eq.Capacity 31 } else { 32 eq.Size++ 33 } 34 } 35