1 /*
2 * Copyright (C) 2009 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 // TODO(b/129481165): remove the #pragma below and fix conversion issues
18 #pragma clang diagnostic push
19 #pragma clang diagnostic ignored "-Wconversion"
20
21 #include <binder/IPCThreadState.h>
22
23 #include <utils/Log.h>
24 #include <utils/Timers.h>
25 #include <utils/threads.h>
26
27 #include <gui/DisplayEventReceiver.h>
28 #include <gui/IDisplayEventConnection.h>
29
30 #include "EventThread.h"
31 #include "MessageQueue.h"
32 #include "SurfaceFlinger.h"
33
34 namespace android::impl {
35
dispatchRefresh()36 void MessageQueue::Handler::dispatchRefresh() {
37 if ((android_atomic_or(eventMaskRefresh, &mEventMask) & eventMaskRefresh) == 0) {
38 mQueue.mLooper->sendMessage(this, Message(MessageQueue::REFRESH));
39 }
40 }
41
dispatchInvalidate(nsecs_t expectedVSyncTimestamp)42 void MessageQueue::Handler::dispatchInvalidate(nsecs_t expectedVSyncTimestamp) {
43 if ((android_atomic_or(eventMaskInvalidate, &mEventMask) & eventMaskInvalidate) == 0) {
44 mExpectedVSyncTime = expectedVSyncTimestamp;
45 mQueue.mLooper->sendMessage(this, Message(MessageQueue::INVALIDATE));
46 }
47 }
48
handleMessage(const Message & message)49 void MessageQueue::Handler::handleMessage(const Message& message) {
50 switch (message.what) {
51 case INVALIDATE:
52 android_atomic_and(~eventMaskInvalidate, &mEventMask);
53 mQueue.mFlinger->onMessageReceived(message.what, mExpectedVSyncTime);
54 break;
55 case REFRESH:
56 android_atomic_and(~eventMaskRefresh, &mEventMask);
57 mQueue.mFlinger->onMessageReceived(message.what, mExpectedVSyncTime);
58 break;
59 }
60 }
61
62 // ---------------------------------------------------------------------------
63
init(const sp<SurfaceFlinger> & flinger)64 void MessageQueue::init(const sp<SurfaceFlinger>& flinger) {
65 mFlinger = flinger;
66 mLooper = new Looper(true);
67 mHandler = new Handler(*this);
68 }
69
setEventConnection(const sp<EventThreadConnection> & connection)70 void MessageQueue::setEventConnection(const sp<EventThreadConnection>& connection) {
71 if (mEventTube.getFd() >= 0) {
72 mLooper->removeFd(mEventTube.getFd());
73 }
74
75 mEvents = connection;
76 mEvents->stealReceiveChannel(&mEventTube);
77 mLooper->addFd(mEventTube.getFd(), 0, Looper::EVENT_INPUT, MessageQueue::cb_eventReceiver,
78 this);
79 }
80
waitMessage()81 void MessageQueue::waitMessage() {
82 do {
83 IPCThreadState::self()->flushCommands();
84 int32_t ret = mLooper->pollOnce(-1);
85 switch (ret) {
86 case Looper::POLL_WAKE:
87 case Looper::POLL_CALLBACK:
88 continue;
89 case Looper::POLL_ERROR:
90 ALOGE("Looper::POLL_ERROR");
91 continue;
92 case Looper::POLL_TIMEOUT:
93 // timeout (should not happen)
94 continue;
95 default:
96 // should not happen
97 ALOGE("Looper::pollOnce() returned unknown status %d", ret);
98 continue;
99 }
100 } while (true);
101 }
102
postMessage(sp<MessageHandler> && handler)103 void MessageQueue::postMessage(sp<MessageHandler>&& handler) {
104 mLooper->sendMessage(handler, Message());
105 }
106
invalidate()107 void MessageQueue::invalidate() {
108 mEvents->requestNextVsync();
109 }
110
refresh()111 void MessageQueue::refresh() {
112 mHandler->dispatchRefresh();
113 }
114
cb_eventReceiver(int fd,int events,void * data)115 int MessageQueue::cb_eventReceiver(int fd, int events, void* data) {
116 MessageQueue* queue = reinterpret_cast<MessageQueue*>(data);
117 return queue->eventReceiver(fd, events);
118 }
119
eventReceiver(int,int)120 int MessageQueue::eventReceiver(int /*fd*/, int /*events*/) {
121 ssize_t n;
122 DisplayEventReceiver::Event buffer[8];
123 while ((n = DisplayEventReceiver::getEvents(&mEventTube, buffer, 8)) > 0) {
124 for (int i = 0; i < n; i++) {
125 if (buffer[i].header.type == DisplayEventReceiver::DISPLAY_EVENT_VSYNC) {
126 mHandler->dispatchInvalidate(buffer[i].vsync.expectedVSyncTimestamp);
127 break;
128 }
129 }
130 }
131 return 1;
132 }
133
134 } // namespace android::impl
135
136 // TODO(b/129481165): remove the #pragma below and fix conversion issues
137 #pragma clang diagnostic pop // ignored "-Wconversion"
138