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48 lines
1.0 KiB
48 lines
1.0 KiB
// Copyright 2015 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package models
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import (
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"sync"
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)
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// workingPool represents a pool of working status which makes sure
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// that only one instance of same task is performing at a time.
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// However, different type of tasks can performing at the same time.
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type workingPool struct {
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lock sync.Mutex
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pool map[string]*sync.Mutex
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count map[string]int
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}
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// CheckIn checks in a task and waits if others are running.
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func (p *workingPool) CheckIn(name string) {
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p.lock.Lock()
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lock, has := p.pool[name]
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if !has {
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lock = &sync.Mutex{}
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p.pool[name] = lock
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}
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p.count[name]++
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p.lock.Unlock()
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lock.Lock()
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}
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// CheckOut checks out a task to let other tasks run.
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func (p *workingPool) CheckOut(name string) {
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p.lock.Lock()
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defer p.lock.Unlock()
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p.pool[name].Unlock()
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if p.count[name] == 1 {
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delete(p.pool, name)
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delete(p.count, name)
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} else {
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p.count[name]--
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}
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}
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