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
15package store
16
17type eventQueue struct {
18	Events   []*Event
19	Size     int
20	Front    int
21	Back     int
22	Capacity int
23}
24
25func (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