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// Copyright 2016 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package sync
import (
"sync"
)
// StatusTable is a table maintains true/false values.
//
// This table is particularly useful for un/marking and checking values
// in different goroutines.
type StatusTable struct {
lock sync.RWMutex
pool map[string]struct{}
}
// NewStatusTable initializes and returns a new StatusTable object.
func NewStatusTable() *StatusTable {
return &StatusTable{
pool: make(map[string]struct{}),
}
}
// StartIfNotRunning sets value of given name to true if not already in pool.
// Returns whether set value was set to true
func (p *StatusTable) StartIfNotRunning(name string) bool {
p.lock.Lock()
_, ok := p.pool[name]
if !ok {
p.pool[name] = struct{}{}
}
p.lock.Unlock()
return !ok
}
// Start sets value of given name to true in the pool.
func (p *StatusTable) Start(name string) {
p.lock.Lock()
p.pool[name] = struct{}{}
p.lock.Unlock()
}
// Stop sets value of given name to false in the pool.
func (p *StatusTable) Stop(name string) {
p.lock.Lock()
delete(p.pool, name)
p.lock.Unlock()
}
// IsRunning checks if value of given name is set to true in the pool.
func (p *StatusTable) IsRunning(name string) bool {
p.lock.RLock()
_, ok := p.pool[name]
p.lock.RUnlock()
return ok
}
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