1 /*
2  * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
3  *
4  * HDF is dual licensed: you can use it either under the terms of
5  * the GPL, or the BSD license, at your option.
6  * See the LICENSE file in the root of this repository for complete details.
7  */
8 
9 #ifndef HDF_SERVICE_SUBSCRIBER_H
10 #define HDF_SERVICE_SUBSCRIBER_H
11 
12 #include "hdf_device.h"
13 #include "hdf_device_desc.h"
14 #include "hdf_slist.h"
15 
16 struct HdfServiceSubscriber {
17     struct HdfSListNode entry;
18     uint32_t state;
19     uint32_t devId;
20     struct SubscriberCallback callback;
21 };
22 
23 enum {
24     HDF_SUBSCRIBER_STATE_PENDING,
25     HDF_SUBSCRIBER_STATE_READY
26 };
27 
28 struct HdfServiceSubscriber *HdfServiceSubscriberObtain(struct SubscriberCallback callback, devid_t devid);
29 void HdfServiceSubscriberRecycle(struct HdfServiceSubscriber *subscriber);
30 void HdfServiceSubscriberDelete(struct HdfSListNode *listEntry);
31 
32 #endif /* HDF_SERVICE_SUBSCRIBER_H */
33