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mutexMap.go
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mutexMap.go
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package container
import "sync"
// MutexMap represents a concurrent safe map
type MutexMap struct {
mut sync.RWMutex
values map[interface{}]interface{}
}
// NewMutexMap returns a new instance of a mutex map
func NewMutexMap() *MutexMap {
return &MutexMap{
values: make(map[interface{}]interface{}),
}
}
// Get returns the element stored with provided key
func (mm *MutexMap) Get(key interface{}) (interface{}, bool) {
mm.mut.RLock()
val, ok := mm.values[key]
mm.mut.RUnlock()
return val, ok
}
// Insert adds the (key, val) tuple if the key does not exist
// returns true operation succeeded
func (mm *MutexMap) Insert(key interface{}, val interface{}) bool {
mm.mut.Lock()
_, ok := mm.values[key]
if !ok {
mm.values[key] = val
}
mm.mut.Unlock()
return !ok
}
// Set stores the (key, val) tuple, rewriting data if existing
func (mm *MutexMap) Set(key interface{}, val interface{}) {
mm.mut.Lock()
mm.values[key] = val
mm.mut.Unlock()
}
// Remove deletes a (key, val) tuple (if exists)
func (mm *MutexMap) Remove(key interface{}) {
mm.mut.Lock()
delete(mm.values, key)
mm.mut.Unlock()
}
// Len returns the inner map size
func (mm *MutexMap) Len() int {
mm.mut.RLock()
defer mm.mut.RUnlock()
return len(mm.values)
}
// Keys returns all stored keys. The order is not guaranteed
func (mm *MutexMap) Keys() []interface{} {
mm.mut.RLock()
keys := make([]interface{}, 0, len(mm.values))
for k := range mm.values {
keys = append(keys, k)
}
mm.mut.RUnlock()
return keys
}
// Values returns all stored values. The order is not guaranteed
func (mm *MutexMap) Values() []interface{} {
mm.mut.RLock()
values := make([]interface{}, 0, len(mm.values))
for _, value := range mm.values {
values = append(values, value)
}
mm.mut.RUnlock()
return values
}