Method Load

pkg/generic_sync/generic_sync.go:103–126

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.

(key K)

// value is present.
// The ok result indicates whether value was found in the map.
func (m *MapOf[K, V]) Load(key K) (value V, ok bool) {
	read, _ := m.read.Load().(readOnly[K, V])
	e, ok := read.m[key]
	if !ok && read.amended {
		m.mu.Lock()
		// Avoid reporting a spurious miss if m.dirty got promoted while we were
		// blocked on m.mu. (If further loads of the same key will not miss, it's
		// not worth copying the dirty map for this key.)
		read, _ = m.read.Load().(readOnly[K, V])
		e, ok = read.m[key]
		if !ok && read.amended {
			e, ok = m.dirty[key]
			// Regardless of whether the entry was present, record a miss: this key
			// will take the slow path until the dirty map is promoted to the read
			// map.
			m.missLocked()
		}
		m.mu.Unlock()
	}
	if !ok {
		return value, false
	}
	return e.load()
}

func (m *MapOf[K, V]) Has(key K) bool {
	_, ok := m.Load(key)