nimona/go-nimona

package xsync

import "sync"

// Map wraps sync.Map to add generics support.
type Map[K, V any] struct {
    m sync.Map
}

// NewMap returns a new Map.
func NewMap[K, V any]() *Map[K, V] {
    return &Map[K, V]{}
}

// Load returns the value stored in the map for a key, or nil if no
// value is present. The ok result indicates whether value was found
// in the map.
func (m *Map[K, V]) Load(key K) (value V, ok bool) {
    v, ok := m.m.Load(key)
    if !ok {
        return
    }
    return v.(V), ok
}

// LoadOrStore returns the existing value for the key if present.
// Otherwise, it stores and returns the given value. The loaded
// result is true if the value was loaded, false if stored.
func (m *Map[K, V]) LoadOrStore(key K, value V) (actual V, loaded bool) {
    v, loaded := m.m.LoadOrStore(key, value)
    return v.(V), loaded
}

// Store sets the value for a key.
func (m *Map[K, V]) Store(key K, value V) {
    m.m.Store(key, value)
}

// Delete deletes the value for a key.
func (m *Map[K, V]) Delete(key K) {
    m.m.Delete(key)
}

// Range calls f sequentially for each key and value present in the map.
// If f returns false, range stops the iteration.
func (m *Map[K, V]) Range(f func(key K, value V) bool) {
    m.m.Range(func(key, value interface{}) bool {
        return f(key.(K), value.(V))
    })
}