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/*
* Copyright (C) 2010 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.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "ALooperRoster"
#include <utils/Log.h>
#include "ALooperRoster.h"
#include "ADebug.h"
#include "AHandler.h"
#include "AMessage.h"
namespace android {
ALooperRoster::ALooperRoster()
: mNextHandlerID(1),
mNextReplyID(1) {
}
ALooper::handler_id ALooperRoster::registerHandler(
const sp<ALooper> looper, const sp<AHandler> &handler) {
Mutex::Autolock autoLock(mLock);
if (handler->id() != 0) {
CHECK(!"A handler must only be registered once.");
return INVALID_OPERATION;
}
HandlerInfo info;
info.mLooper = looper;
info.mHandler = handler;
ALooper::handler_id handlerID = mNextHandlerID++;
mHandlers.add(handlerID, info);
handler->setID(handlerID);
return handlerID;
}
void ALooperRoster::unregisterHandler(ALooper::handler_id handlerID) {
Mutex::Autolock autoLock(mLock);
ssize_t index = mHandlers.indexOfKey(handlerID);
if (index < 0) {
return;
}
const HandlerInfo &info = mHandlers.valueAt(index);
sp<AHandler> handler = info.mHandler.promote();
if (handler != NULL) {
handler->setID(0);
}
mHandlers.removeItemsAt(index);
}
status_t ALooperRoster::postMessage(
const sp<AMessage> &msg, int64_t delayUs) {
Mutex::Autolock autoLock(mLock);
return postMessage_l(msg, delayUs);
}
status_t ALooperRoster::postMessage_l(
const sp<AMessage> &msg, int64_t delayUs) {
ssize_t index = mHandlers.indexOfKey(msg->target());
if (index < 0) {
ALOGW("failed to post message. Target handler not registered.");
return -ENOENT;
}
const HandlerInfo &info = mHandlers.valueAt(index);
sp<ALooper> looper = info.mLooper.promote();
if (looper == NULL) {
ALOGW("failed to post message. "
"Target handler %d still registered, but object gone.",
msg->target());
mHandlers.removeItemsAt(index);
return -ENOENT;
}
looper->post(msg, delayUs);
return OK;
}
void ALooperRoster::deliverMessage(const sp<AMessage> &msg) {
sp<AHandler> handler;
{
Mutex::Autolock autoLock(mLock);
ssize_t index = mHandlers.indexOfKey(msg->target());
if (index < 0) {
ALOGW("failed to deliver message. Target handler not registered.");
return;
}
const HandlerInfo &info = mHandlers.valueAt(index);
handler = info.mHandler.promote();
if (handler == NULL) {
ALOGW("failed to deliver message. "
"Target handler %d registered, but object gone.",
msg->target());
mHandlers.removeItemsAt(index);
return;
}
}
handler->onMessageReceived(msg);
}
sp<ALooper> ALooperRoster::findLooper(ALooper::handler_id handlerID) {
Mutex::Autolock autoLock(mLock);
ssize_t index = mHandlers.indexOfKey(handlerID);
if (index < 0) {
return NULL;
}
sp<ALooper> looper = mHandlers.valueAt(index).mLooper.promote();
if (looper == NULL) {
mHandlers.removeItemsAt(index);
return NULL;
}
return looper;
}
status_t ALooperRoster::postAndAwaitResponse(
const sp<AMessage> &msg, sp<AMessage> *response) {
Mutex::Autolock autoLock(mLock);
uint32_t replyID = mNextReplyID++;
msg->setInt32("replyID", replyID);
status_t err = postMessage_l(msg, 0 /* delayUs */);
if (err != OK) {
response->clear();
return err;
}
ssize_t index;
while ((index = mReplies.indexOfKey(replyID)) < 0) {
mRepliesCondition.wait(mLock);
}
*response = mReplies.valueAt(index);
mReplies.removeItemsAt(index);
return OK;
}
void ALooperRoster::postReply(uint32_t replyID, const sp<AMessage> &reply) {
Mutex::Autolock autoLock(mLock);
CHECK(mReplies.indexOfKey(replyID) < 0);
mReplies.add(replyID, reply);
mRepliesCondition.broadcast();
}
} // namespace android
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