1  /*
2   * Copyright (c) 2023 Huawei Device Co., Ltd.
3   * Licensed under the Apache License, Version 2.0 (the "License");
4   * you may not use this file except in compliance with the License.
5   * You may obtain a copy of the License at
6   *
7   *     http://www.apache.org/licenses/LICENSE-2.0
8   *
9   * Unless required by applicable law or agreed to in writing, software
10   * distributed under the License is distributed on an "AS IS" BASIS,
11   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12   * See the License for the specific language governing permissions and
13   * limitations under the License.
14   */
15 
16 #include "iservice_registry.h"
17 
18 namespace OHOS {
19 SystemAbilityManagerClient* SystemAbilityManagerClient::clientInstance = nullptr;
20 SystemAbilityManagerClient SystemAbilityManagerClient::defaultInstance;
21 std::mutex SystemAbilityManagerClient::instanceMtx;
22 
GetInstance()23 SystemAbilityManagerClient& SystemAbilityManagerClient::GetInstance()
24 {
25     std::lock_guard<std::mutex> lock(instanceMtx);
26     if (clientInstance == nullptr) {
27         clientInstance = new (std::nothrow)SystemAbilityManagerClient();
28         if (clientInstance == nullptr) {
29             return defaultInstance;
30         }
31     }
32     return *clientInstance;
33 }
34 } // namespace OHOS
35