nextcloud-spreed-signaling/container/concurrentmap.go

/**
 * Standalone signaling server for the Nextcloud Spreed app.
 * Copyright (C) 2017 struktur AG
 *
 * @author Joachim Bauch <bauch@struktur.de>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package container

import (
	"sync"
)

type ConcurrentMap[K comparable, V any] struct {
	mu sync.RWMutex
	// +checklocks:mu
	d map[K]V
}

func (m *ConcurrentMap[K, V]) Set(key K, value V) {
	m.mu.Lock()
	defer m.mu.Unlock()
	if m.d == nil {
		m.d = make(map[K]V)
	}
	m.d[key] = value
}

func (m *ConcurrentMap[K, V]) Get(key K) (V, bool) {
	m.mu.RLock()
	defer m.mu.RUnlock()
	s, found := m.d[key]
	return s, found
}

func (m *ConcurrentMap[K, V]) Del(key K) {
	m.mu.Lock()
	defer m.mu.Unlock()
	delete(m.d, key)
}

func (m *ConcurrentMap[K, V]) Len() int {
	m.mu.RLock()
	defer m.mu.RUnlock()
	return len(m.d)
}

func (m *ConcurrentMap[K, V]) Clear() {
	m.mu.Lock()
	defer m.mu.Unlock()
	m.d = nil
}