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1 /*
2  * Copyright (C) 2024 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 <queue>
20 
21 #include "interface/Event.h"
22 
23 namespace android::hardware::graphics::composer {
24 
25 struct EventQueue {
26 public:
27     EventQueue() = default;
28 
postEventEventQueue29     void postEvent(VrrControllerEventType type, TimedEvent& timedEvent) {
30         VrrControllerEvent event;
31         event.mEventType = type;
32         setTimedEventWithAbsoluteTime(timedEvent);
33         event.mWhenNs = timedEvent.mWhenNs;
34         event.mFunctor = std::move(timedEvent.mFunctor);
35         mPriorityQueue.emplace(event);
36     }
37 
postEventEventQueue38     void postEvent(VrrControllerEventType type, int64_t when) {
39         VrrControllerEvent event;
40         event.mEventType = type;
41         event.mWhenNs = when;
42         mPriorityQueue.emplace(event);
43     }
44 
dropEventEventQueue45     void dropEvent() { mPriorityQueue = std::priority_queue<VrrControllerEvent>(); }
46 
dropEventEventQueue47     void dropEvent(VrrControllerEventType event_type) {
48         std::priority_queue<VrrControllerEvent> q;
49         while (!mPriorityQueue.empty()) {
50             const auto& it = mPriorityQueue.top();
51             if (it.mEventType != event_type) {
52                 q.push(it);
53             }
54             mPriorityQueue.pop();
55         }
56         mPriorityQueue = std::move(q);
57     }
58 
getNumberOfEventsEventQueue59     size_t getNumberOfEvents(VrrControllerEventType eventType) {
60         size_t res = 0;
61         std::priority_queue<VrrControllerEvent> q;
62         while (!mPriorityQueue.empty()) {
63             const auto& it = mPriorityQueue.top();
64             if (it.mEventType == eventType) {
65                 ++res;
66             }
67             q.push(it);
68             mPriorityQueue.pop();
69         }
70         mPriorityQueue = std::move(q);
71         return res;
72     }
73 
74     std::priority_queue<VrrControllerEvent> mPriorityQueue;
75 };
76 
77 } // namespace android::hardware::graphics::composer
78