| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <errno.h> |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #include <binder/IPCThreadState.h> |
| |
| #include <utils/Log.h> |
| #include <utils/Timers.h> |
| #include <utils/threads.h> |
| |
| #include <gui/DisplayEventReceiver.h> |
| #include <gui/IDisplayEventConnection.h> |
| |
| #include "EventThread.h" |
| #include "MessageQueue.h" |
| #include "SurfaceFlinger.h" |
| |
| namespace android { |
| |
| // --------------------------------------------------------------------------- |
| |
| MessageBase::MessageBase() : MessageHandler() {} |
| |
| MessageBase::~MessageBase() {} |
| |
| void MessageBase::handleMessage(const Message&) { |
| this->handler(); |
| barrier.open(); |
| }; |
| |
| // --------------------------------------------------------------------------- |
| |
| MessageQueue::~MessageQueue() = default; |
| |
| // --------------------------------------------------------------------------- |
| |
| namespace impl { |
| |
| void MessageQueue::Handler::dispatchRefresh() { |
| if ((android_atomic_or(eventMaskRefresh, &mEventMask) & eventMaskRefresh) == 0) { |
| mQueue.mLooper->sendMessage(this, Message(MessageQueue::REFRESH)); |
| } |
| } |
| |
| void MessageQueue::Handler::dispatchInvalidate() { |
| if ((android_atomic_or(eventMaskInvalidate, &mEventMask) & eventMaskInvalidate) == 0) { |
| mQueue.mLooper->sendMessage(this, Message(MessageQueue::INVALIDATE)); |
| } |
| } |
| |
| void MessageQueue::Handler::handleMessage(const Message& message) { |
| switch (message.what) { |
| case INVALIDATE: |
| android_atomic_and(~eventMaskInvalidate, &mEventMask); |
| mQueue.mFlinger->onMessageReceived(message.what); |
| break; |
| case REFRESH: |
| android_atomic_and(~eventMaskRefresh, &mEventMask); |
| mQueue.mFlinger->onMessageReceived(message.what); |
| break; |
| } |
| } |
| |
| // --------------------------------------------------------------------------- |
| |
| void MessageQueue::init(const sp<SurfaceFlinger>& flinger) { |
| mFlinger = flinger; |
| mLooper = new Looper(true); |
| mHandler = new Handler(*this); |
| } |
| |
| void MessageQueue::setEventThread(android::EventThread* eventThread) { |
| if (mEventThread == eventThread) { |
| return; |
| } |
| |
| if (mEventTube.getFd() >= 0) { |
| mLooper->removeFd(mEventTube.getFd()); |
| } |
| |
| mEventThread = eventThread; |
| mEvents = eventThread->createEventConnection(); |
| mEvents->stealReceiveChannel(&mEventTube); |
| mLooper->addFd(mEventTube.getFd(), 0, Looper::EVENT_INPUT, MessageQueue::cb_eventReceiver, |
| this); |
| } |
| |
| void MessageQueue::waitMessage() { |
| do { |
| IPCThreadState::self()->flushCommands(); |
| int32_t ret = mLooper->pollOnce(-1); |
| switch (ret) { |
| case Looper::POLL_WAKE: |
| case Looper::POLL_CALLBACK: |
| continue; |
| case Looper::POLL_ERROR: |
| ALOGE("Looper::POLL_ERROR"); |
| continue; |
| case Looper::POLL_TIMEOUT: |
| // timeout (should not happen) |
| continue; |
| default: |
| // should not happen |
| ALOGE("Looper::pollOnce() returned unknown status %d", ret); |
| continue; |
| } |
| } while (true); |
| } |
| |
| status_t MessageQueue::postMessage(const sp<MessageBase>& messageHandler, nsecs_t relTime) { |
| const Message dummyMessage; |
| if (relTime > 0) { |
| mLooper->sendMessageDelayed(relTime, messageHandler, dummyMessage); |
| } else { |
| mLooper->sendMessage(messageHandler, dummyMessage); |
| } |
| return NO_ERROR; |
| } |
| |
| void MessageQueue::invalidate() { |
| mEvents->requestNextVsync(); |
| } |
| |
| void MessageQueue::refresh() { |
| mHandler->dispatchRefresh(); |
| } |
| |
| int MessageQueue::cb_eventReceiver(int fd, int events, void* data) { |
| MessageQueue* queue = reinterpret_cast<MessageQueue*>(data); |
| return queue->eventReceiver(fd, events); |
| } |
| |
| int MessageQueue::eventReceiver(int /*fd*/, int /*events*/) { |
| ssize_t n; |
| DisplayEventReceiver::Event buffer[8]; |
| while ((n = DisplayEventReceiver::getEvents(&mEventTube, buffer, 8)) > 0) { |
| for (int i = 0; i < n; i++) { |
| if (buffer[i].header.type == DisplayEventReceiver::DISPLAY_EVENT_VSYNC) { |
| mHandler->dispatchInvalidate(); |
| break; |
| } |
| } |
| } |
| return 1; |
| } |
| |
| // --------------------------------------------------------------------------- |
| |
| } // namespace impl |
| } // namespace android |