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/*
* 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 <stdint.h>
#include <errno.h>
#include <sys/types.h>
#include <utils/threads.h>
#include <utils/Timers.h>
#include <utils/Log.h>
#include <binder/IPCThreadState.h>
#include "MessageQueue.h"
namespace android {
// ---------------------------------------------------------------------------
MessageBase::MessageBase()
: MessageHandler() {
}
MessageBase::~MessageBase() {
}
void MessageBase::handleMessage(const Message&) {
this->handler();
barrier.open();
};
// ---------------------------------------------------------------------------
MessageQueue::MessageQueue()
: mLooper(new Looper(true)), mWorkPending(0)
{
}
MessageQueue::~MessageQueue() {
}
void MessageQueue::waitMessage() {
do {
IPCThreadState::self()->flushCommands();
int32_t ret = mLooper->pollOnce(-1);
switch (ret) {
case ALOOPER_POLL_WAKE:
case ALOOPER_POLL_CALLBACK:
// callback and/or wake
if (android_atomic_and(0, &mWorkPending)) {
return;
}
continue;
case ALOOPER_POLL_TIMEOUT:
// timeout (should not happen)
continue;
case ALOOPER_POLL_ERROR:
ALOGE("ALOOPER_POLL_ERROR");
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;
}
status_t MessageQueue::invalidate() {
if (android_atomic_or(1, &mWorkPending) == 0) {
mLooper->wake();
}
return NO_ERROR;
}
// ---------------------------------------------------------------------------
}; // namespace android
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