106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <utils/threads.h>
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#include <utils/Timers.h>
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#include <utils/Log.h>
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#include <binder/IPCThreadState.h>
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#include "MessageQueue.h"
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namespace android {
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// ---------------------------------------------------------------------------
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MessageBase::MessageBase()
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: MessageHandler() {
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}
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MessageBase::~MessageBase() {
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}
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void MessageBase::handleMessage(const Message&) {
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this->handler();
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barrier.open();
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};
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// ---------------------------------------------------------------------------
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MessageQueue::MessageQueue()
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: mLooper(new Looper(true)), mWorkPending(0)
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{
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}
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MessageQueue::~MessageQueue() {
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}
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void MessageQueue::waitMessage() {
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do {
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IPCThreadState::self()->flushCommands();
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int32_t ret = mLooper->pollOnce(-1);
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switch (ret) {
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case ALOOPER_POLL_WAKE:
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case ALOOPER_POLL_CALLBACK:
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// callback and/or wake
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if (android_atomic_and(0, &mWorkPending)) {
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return;
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}
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continue;
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case ALOOPER_POLL_TIMEOUT:
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// timeout (should not happen)
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continue;
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case ALOOPER_POLL_ERROR:
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LOGE("ALOOPER_POLL_ERROR");
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continue;
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default:
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// should not happen
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LOGE("Looper::pollOnce() returned unknown status %d", ret);
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continue;
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}
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} while (true);
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}
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status_t MessageQueue::postMessage(
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const sp<MessageBase>& messageHandler, nsecs_t relTime)
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{
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const Message dummyMessage;
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if (relTime > 0) {
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mLooper->sendMessageDelayed(relTime, messageHandler, dummyMessage);
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} else {
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mLooper->sendMessage(messageHandler, dummyMessage);
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}
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return NO_ERROR;
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}
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status_t MessageQueue::invalidate() {
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if (android_atomic_or(1, &mWorkPending) == 0) {
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mLooper->wake();
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}
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return NO_ERROR;
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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