1 /*
2  * Copyright 2016 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 #include "Event.h"
18 
19 using namespace android;
20 using Increment = surfaceflinger::Increment;
21 
Event(Increment::IncrementCase type)22 Event::Event(Increment::IncrementCase type) : mIncrementType(type) {}
23 
readyToExecute()24 void Event::readyToExecute() {
25     changeState(Event::EventState::Waiting);
26     waitUntil(Event::EventState::Signaled);
27     changeState(Event::EventState::Running);
28 }
29 
complete()30 void Event::complete() {
31     waitUntil(Event::EventState::Waiting);
32     changeState(Event::EventState::Signaled);
33     waitUntil(Event::EventState::Running);
34 }
35 
waitUntil(Event::EventState state)36 void Event::waitUntil(Event::EventState state) {
37     std::unique_lock<std::mutex> lock(mLock);
38     mCond.wait(lock, [this, state] { return (mState == state); });
39 }
40 
changeState(Event::EventState state)41 void Event::changeState(Event::EventState state) {
42     std::unique_lock<std::mutex> lock(mLock);
43     mState = state;
44     lock.unlock();
45 
46     mCond.notify_one();
47 }
48 
getIncrementType()49 Increment::IncrementCase Event::getIncrementType() {
50     return mIncrementType;
51 }
52