1 /*
2  * Copyright 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <android-base/logging.h>
20 #include <android-base/unique_fd.h>
21 #include <xf86drm.h>
22 #include <xf86drmMode.h>
23 
24 #include <cstdint>
25 #include <functional>
26 #include <optional>
27 #include <thread>
28 #include <unordered_map>
29 
30 #include "Common.h"
31 
32 namespace aidl::android::hardware::graphics::composer3::impl {
33 
34 class DrmEventListener {
35    public:
36     static std::unique_ptr<DrmEventListener> create(::android::base::borrowed_fd drmFd,
37                                                     std::function<void()> callback);
38 
~DrmEventListener()39     ~DrmEventListener() {}
40 
41    private:
DrmEventListener(std::function<void ()> callback)42     DrmEventListener(std::function<void()> callback) : mOnEventCallback(std::move(callback)) {}
43 
44     bool init(::android::base::borrowed_fd drmFd);
45 
46     void threadLoop();
47 
48     std::thread mThread;
49     std::function<void()> mOnEventCallback;
50     ::android::base::unique_fd mEventFd;
51     fd_set mMonitoredFds;
52     int mMaxMonitoredFd = 0;
53 };
54 
55 }  // namespace aidl::android::hardware::graphics::composer3::impl
56