1 /*
2  * Copyright (c) 2021-2023 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 #ifndef HDI_SESSION_H
17 #define HDI_SESSION_H
18 #include <unordered_map>
19 #include <vector>
20 #include <memory>
21 #include "common/include/display_common.h"
22 #include "display_log.h"
23 #include "hdi_device_interface.h"
24 #include "hdi_display.h"
25 #include "hdi_netlink_monitor.h"
26 #include "v1_0/display_composer_type.h"
27 #include <mutex>
28 
29 namespace OHOS {
30 namespace HDI {
31 namespace DISPLAY {
32 class HdiSession {
33 public:
34     void Init();
35     static HdiSession &GetInstance();
36 
37     template<typename... Args>
CallDisplayFunction(uint32_t devId, int32_t (HdiDisplay::*member)(Args...), Args... args)38     int32_t CallDisplayFunction(uint32_t devId, int32_t (HdiDisplay::*member)(Args...), Args... args)
39     {
40         DISPLAY_LOGD("device Id : %{public}d", devId);
41         DISPLAY_CHK_RETURN((devId == INVALIDE_DISPLAY_ID), DISPLAY_FAILURE, DISPLAY_LOGE("invalide device id"));
42         std::lock_guard<std::mutex> lock(mMutex);
43         auto iter = mHdiDisplays.find(devId);
44         DISPLAY_CHK_RETURN((iter == mHdiDisplays.end()), DISPLAY_FAILURE,
45             DISPLAY_LOGE("can not find display %{public}d", devId));
46         auto display = iter->second.get();
47         return (display->*member)(std::forward<Args>(args)...);
48     }
49 
50     template<typename... Args>
CallLayerFunction(uint32_t devId, uint32_t layerId, int32_t (HdiLayer::*member)(Args...), Args... args)51     int32_t CallLayerFunction(uint32_t devId, uint32_t layerId, int32_t (HdiLayer::*member)(Args...), Args... args)
52     {
53         DISPLAY_LOGD("device Id : %{public}d", devId);
54         DISPLAY_CHK_RETURN((devId == INVALIDE_DISPLAY_ID), DISPLAY_FAILURE, DISPLAY_LOGE("invalide device id"));
55         std::lock_guard<std::mutex> lock(mMutex);
56         auto iter = mHdiDisplays.find(devId);
57         DISPLAY_CHK_RETURN((iter == mHdiDisplays.end()), DISPLAY_FAILURE,
58             DISPLAY_LOGE("can not find display %{public}d", devId));
59         auto display = iter->second.get();
60         auto layer = display->GetHdiLayer(layerId);
61         DISPLAY_CHK_RETURN((layer == nullptr), DISPLAY_FAILURE,
62             DISPLAY_LOGE("can not find the layer %{public}d", layerId));
63         return (layer->*member)(std::forward<Args>(args)...);
64     }
65 
66     int32_t RegHotPlugCallback(HotPlugCallback callback, void *data);
67     void DoHotPlugCallback(uint32_t devId, bool connect);
68     void HandleHotplug(bool plugIn);
69 
70 private:
71     std::shared_ptr<HdiNetLinkMonitor> mNetLinkMonitor;
72     std::unordered_map<uint32_t, std::shared_ptr<HdiDisplay>> mHdiDisplays;
73     std::vector<std::shared_ptr<HdiDeviceInterface>> mHdiDevices;
74     std::unordered_map<HotPlugCallback, void *> mHotPlugCallBacks;
75     std::mutex mMutex;
76 };
77 } // namespace OHOS
78 } // namespace HDI
79 } // namespace DISPLAY
80 
81 #endif // HDI_SESSION_H
82