modules/sync: move sync objects to independent module

modules/sync/status_pool.go

@@ -0,0 +1,49 @@
+// 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]bool
+}
+
+// NewStatusTable initializes and returns a new StatusTable object.
+func NewStatusTable() *StatusTable {
+	return &StatusTable{
+		pool: make(map[string]bool),
+	}
+}
+
+// Start sets value of given name to true in the pool.
+func (p *StatusTable) Start(name string) {
+	p.lock.Lock()
+	defer p.lock.Unlock()
+
+	p.pool[name] = true
+}
+
+// Stop sets value of given name to false in the pool.
+func (p *StatusTable) Stop(name string) {
+	p.lock.Lock()
+	defer p.lock.Unlock()
+
+	p.pool[name] = false
+}
+
+// IsRunning checks if value of given name is set to true in the pool.
+func (p *StatusTable) IsRunning(name string) bool {
+	p.lock.RLock()
+	defer p.lock.RUnlock()
+
+	return p.pool[name]
+}