1 /*
2 * Copyright (c) 2021 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 "parameter.h"
17 #include "init_param.h"
18 #include "sysparam_errno.h"
19
WatchParameter(const char * keyprefix,ParameterChgPtr callback,void * context)20 int WatchParameter(const char *keyprefix, ParameterChgPtr callback, void *context)
21 {
22 if (keyprefix == nullptr) {
23 return EC_INVALID;
24 }
25 #ifdef NO_PARAM_WATCHER
26 printf("ParameterWatcher is disabled.");
27 return EC_INVALID;
28 #else
29 return SystemWatchParameter(keyprefix, callback, context);
30 #endif
31 }
32