add sync map

pkg/task/map.go

@@ -0,0 +1,57 @@
+/*
+
+m := new(Map[string, string])
+m.Store("hi", "ho")
+*/
+
+package task
+
+import "sync"
+
+type Map[K comparable, V any] struct {
+	m sync.Map
+}
+
+func (m *Map[K, V]) Delete(key K) {
+	m.m.Delete(key)
+}
+
+func (m *Map[K, V]) Load(key K) (value V, ok bool) {
+	v, ok := m.m.Load(key)
+	if !ok {
+		return value, ok
+	}
+	return v.(V), ok
+}
+
+func (m *Map[K, V]) LoadAndDelete(key K) (value V, loaded bool) {
+	v, loaded := m.m.LoadAndDelete(key)
+	if !loaded {
+		return value, loaded
+	}
+	return v.(V), loaded
+}
+
+func (m *Map[K, V]) LoadOrStore(key K, value V) (actual V, loaded bool) {
+	a, loaded := m.m.LoadOrStore(key, value)
+	return a.(V), loaded
+}
+
+func (m *Map[K, V]) Range(f func(key K, value V) bool) {
+	m.m.Range(func(key, value any) bool {
+		return f(key.(K), value.(V))
+	})
+}
+
+func (m *Map[K, V]) Store(key K, value V) {
+	m.m.Store(key, value)
+}
+
+func (m *Map[K, V]) Length() int {
+	var i int
+	m.Range(func(k K, v V) bool {
+		i++
+		return true
+	})
+	return i
+}