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 #ifndef HDI_SESSION_H
17 #define HDI_SESSION_H
18 #include <unordered_map>
19 #include <vector>
20 #include <memory>
21 #include "display_device.h"
22 #include "hdi_device_interface.h"
23 #include "hdi_display.h"
24 #include "hdi_netlink_monitor.h"
25 
26 namespace OHOS {
27 namespace HDI {
28 namespace DISPLAY {
29 class HdiSession {
30 public:
31     void Init();
32     static HdiSession &GetInstance();
33 
34     template<typename... Args>
CallDisplayFunction(uint32_t devId, int32_t (HdiDisplay::*member)(Args...), Args... args)35     int32_t CallDisplayFunction(uint32_t devId, int32_t (HdiDisplay::*member)(Args...), Args... args)
36     {
37         DISPLAY_DEBUGLOG("device Id : %{public}d", devId);
38         DISPLAY_CHK_RETURN((devId == INVALIDE_DISPLAY_ID), DISPLAY_FAILURE, DISPLAY_LOGE("invalide device id"));
39         auto iter = mHdiDisplays.find(devId);
40         DISPLAY_CHK_RETURN((iter == mHdiDisplays.end()), DISPLAY_FAILURE,
41             DISPLAY_LOGE("can not find display %{public}d", devId));
42         auto display = iter->second.get();
43         return (display->*member)(std::forward<Args>(args)...);
44     }
45 
46     template<typename... Args>
CallLayerFunction(uint32_t devId, uint32_t layerId, int32_t (HdiLayer::*member)(Args...), Args... args)47     int32_t CallLayerFunction(uint32_t devId, uint32_t layerId, int32_t (HdiLayer::*member)(Args...), Args... args)
48     {
49         DISPLAY_DEBUGLOG("device Id : %{public}d", devId);
50         DISPLAY_CHK_RETURN((devId == INVALIDE_DISPLAY_ID), DISPLAY_FAILURE, DISPLAY_LOGE("invalide device id"));
51         auto iter = mHdiDisplays.find(devId);
52         DISPLAY_CHK_RETURN((iter == mHdiDisplays.end()), DISPLAY_FAILURE,
53             DISPLAY_LOGE("can not find display %{public}d", devId));
54         auto display = iter->second.get();
55         auto layer = display->GetHdiLayer(layerId);
56         DISPLAY_CHK_RETURN((layer == nullptr), DISPLAY_FAILURE,
57             DISPLAY_LOGE("can not find the layer %{public}d", layerId));
58         return (layer->*member)(std::forward<Args>(args)...);
59     }
60 
61     int32_t RegHotPlugCallback(HotPlugCallback callback, void *data);
62     void DoHotPlugCallback(uint32_t devId, bool connect);
63     void HandleHotplug(bool plugIn);
64 
65 private:
66     std::shared_ptr<HdiNetLinkMonitor> mNetLinkMonitor;
67     std::unordered_map<uint32_t, std::shared_ptr<HdiDisplay>> mHdiDisplays;
68     std::vector<std::shared_ptr<HdiDeviceInterface>> mHdiDevices;
69     std::unordered_map<HotPlugCallback, void *> mHotPlugCallBacks;
70 };
71 } // namespace OHOS
72 } // namespace HDI
73 } // namespace DISPLAY
74 
75 #endif // HDI_SESSION_H