57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
// Copyright 2017-2018 The NATS Authors
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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 nats
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import (
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"sync"
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"time"
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)
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// global pool of *time.Timer's. can be used by multiple goroutines concurrently.
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var globalTimerPool timerPool
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// timerPool provides GC-able pooling of *time.Timer's.
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// can be used by multiple goroutines concurrently.
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type timerPool struct {
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p sync.Pool
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}
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// Get returns a timer that completes after the given duration.
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func (tp *timerPool) Get(d time.Duration) *time.Timer {
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if t, _ := tp.p.Get().(*time.Timer); t != nil {
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t.Reset(d)
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return t
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}
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return time.NewTimer(d)
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}
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// Put pools the given timer.
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//
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// There is no need to call t.Stop() before calling Put.
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//
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// Put will try to stop the timer before pooling. If the
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// given timer already expired, Put will read the unreceived
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// value if there is one.
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func (tp *timerPool) Put(t *time.Timer) {
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if !t.Stop() {
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select {
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case <-t.C:
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default:
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}
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}
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tp.p.Put(t)
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}
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