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Beego/safemap.go

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2013-03-28 07:25:49 +00:00
package beego
import (
"sync"
)
type BeeMap struct {
lock *sync.RWMutex
bm map[interface{}]interface{}
}
func NewBeeMap() *BeeMap {
return &BeeMap{
lock: new(sync.RWMutex),
bm: make(map[interface{}]interface{}),
}
}
//Get from maps return the k's value
func (m *BeeMap) Get(k interface{}) interface{} {
m.lock.RLock()
defer m.lock.RUnlock()
if val, ok := m.bm[k]; ok {
return val
}
return nil
}
// Maps the given key and value. Returns false
// if the key is already in the map and changes nothing.
func (m *BeeMap) Set(k interface{}, v interface{}) bool {
m.lock.Lock()
defer m.lock.Unlock()
if val, ok := m.bm[k]; !ok {
m.bm[k] = v
} else if val != v {
m.bm[k] = v
} else {
return false
}
return true
}
// Returns true if k is exist in the map.
func (m *BeeMap) Check(k interface{}) bool {
m.lock.RLock()
defer m.lock.RUnlock()
if _, ok := m.bm[k]; !ok {
return false
}
return true
}
func (m *BeeMap) Delete(k interface{}) {
m.lock.Lock()
defer m.lock.Unlock()
delete(m.bm, k)
}
func (m *BeeMap) Items() map[interface{}]interface{} {
m.lock.RLock()
defer m.lock.RUnlock()
return m.bm
}