mirror of https://github.com/fatedier/frp.git
61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
// Copyright 2017 fatedier, fatedier@gmail.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metric
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import (
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"sync/atomic"
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)
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type Counter interface {
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Count() int32
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Inc(int32)
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Dec(int32)
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Snapshot() Counter
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Clear()
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}
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func NewCounter() Counter {
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return &StandardCounter{
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count: 0,
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}
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}
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type StandardCounter struct {
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count int32
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}
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func (c *StandardCounter) Count() int32 {
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return atomic.LoadInt32(&c.count)
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}
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func (c *StandardCounter) Inc(count int32) {
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atomic.AddInt32(&c.count, count)
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}
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func (c *StandardCounter) Dec(count int32) {
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atomic.AddInt32(&c.count, -count)
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}
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func (c *StandardCounter) Snapshot() Counter {
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tmp := &StandardCounter{
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count: atomic.LoadInt32(&c.count),
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}
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return tmp
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}
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func (c *StandardCounter) Clear() {
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atomic.StoreInt32(&c.count, 0)
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}
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