172961230a5890071bcca436eb5630172ce84ec41Andreas Huber/* 272961230a5890071bcca436eb5630172ce84ec41Andreas Huber * Copyright (C) 2010 The Android Open Source Project 372961230a5890071bcca436eb5630172ce84ec41Andreas Huber * 472961230a5890071bcca436eb5630172ce84ec41Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 572961230a5890071bcca436eb5630172ce84ec41Andreas Huber * you may not use this file except in compliance with the License. 672961230a5890071bcca436eb5630172ce84ec41Andreas Huber * You may obtain a copy of the License at 772961230a5890071bcca436eb5630172ce84ec41Andreas Huber * 872961230a5890071bcca436eb5630172ce84ec41Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 972961230a5890071bcca436eb5630172ce84ec41Andreas Huber * 1072961230a5890071bcca436eb5630172ce84ec41Andreas Huber * Unless required by applicable law or agreed to in writing, software 1172961230a5890071bcca436eb5630172ce84ec41Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 1272961230a5890071bcca436eb5630172ce84ec41Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1372961230a5890071bcca436eb5630172ce84ec41Andreas Huber * See the License for the specific language governing permissions and 1472961230a5890071bcca436eb5630172ce84ec41Andreas Huber * limitations under the License. 1572961230a5890071bcca436eb5630172ce84ec41Andreas Huber */ 1672961230a5890071bcca436eb5630172ce84ec41Andreas Huber 1772961230a5890071bcca436eb5630172ce84ec41Andreas Huber//#define LOG_NDEBUG 0 1872961230a5890071bcca436eb5630172ce84ec41Andreas Huber#define LOG_TAG "ALooperRoster" 1972961230a5890071bcca436eb5630172ce84ec41Andreas Huber#include <utils/Log.h> 2072961230a5890071bcca436eb5630172ce84ec41Andreas Huber 2172961230a5890071bcca436eb5630172ce84ec41Andreas Huber#include "ALooperRoster.h" 2272961230a5890071bcca436eb5630172ce84ec41Andreas Huber 2372961230a5890071bcca436eb5630172ce84ec41Andreas Huber#include "ADebug.h" 2472961230a5890071bcca436eb5630172ce84ec41Andreas Huber#include "AHandler.h" 2572961230a5890071bcca436eb5630172ce84ec41Andreas Huber#include "AMessage.h" 2672961230a5890071bcca436eb5630172ce84ec41Andreas Huber 2772961230a5890071bcca436eb5630172ce84ec41Andreas Hubernamespace android { 2872961230a5890071bcca436eb5630172ce84ec41Andreas Huber 2972961230a5890071bcca436eb5630172ce84ec41Andreas HuberALooperRoster::ALooperRoster() 305df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber : mNextHandlerID(1), 315df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber mNextReplyID(1) { 3272961230a5890071bcca436eb5630172ce84ec41Andreas Huber} 3372961230a5890071bcca436eb5630172ce84ec41Andreas Huber 3472961230a5890071bcca436eb5630172ce84ec41Andreas HuberALooper::handler_id ALooperRoster::registerHandler( 3572961230a5890071bcca436eb5630172ce84ec41Andreas Huber const sp<ALooper> looper, const sp<AHandler> &handler) { 3672961230a5890071bcca436eb5630172ce84ec41Andreas Huber Mutex::Autolock autoLock(mLock); 3772961230a5890071bcca436eb5630172ce84ec41Andreas Huber 3872961230a5890071bcca436eb5630172ce84ec41Andreas Huber if (handler->id() != 0) { 3972961230a5890071bcca436eb5630172ce84ec41Andreas Huber CHECK(!"A handler must only be registered once."); 4072961230a5890071bcca436eb5630172ce84ec41Andreas Huber return INVALID_OPERATION; 4172961230a5890071bcca436eb5630172ce84ec41Andreas Huber } 4272961230a5890071bcca436eb5630172ce84ec41Andreas Huber 4372961230a5890071bcca436eb5630172ce84ec41Andreas Huber HandlerInfo info; 4472961230a5890071bcca436eb5630172ce84ec41Andreas Huber info.mLooper = looper; 4572961230a5890071bcca436eb5630172ce84ec41Andreas Huber info.mHandler = handler; 4672961230a5890071bcca436eb5630172ce84ec41Andreas Huber ALooper::handler_id handlerID = mNextHandlerID++; 4772961230a5890071bcca436eb5630172ce84ec41Andreas Huber mHandlers.add(handlerID, info); 4872961230a5890071bcca436eb5630172ce84ec41Andreas Huber 4972961230a5890071bcca436eb5630172ce84ec41Andreas Huber handler->setID(handlerID); 5072961230a5890071bcca436eb5630172ce84ec41Andreas Huber 5172961230a5890071bcca436eb5630172ce84ec41Andreas Huber return handlerID; 5272961230a5890071bcca436eb5630172ce84ec41Andreas Huber} 5372961230a5890071bcca436eb5630172ce84ec41Andreas Huber 5472961230a5890071bcca436eb5630172ce84ec41Andreas Hubervoid ALooperRoster::unregisterHandler(ALooper::handler_id handlerID) { 5572961230a5890071bcca436eb5630172ce84ec41Andreas Huber Mutex::Autolock autoLock(mLock); 5672961230a5890071bcca436eb5630172ce84ec41Andreas Huber 5772961230a5890071bcca436eb5630172ce84ec41Andreas Huber ssize_t index = mHandlers.indexOfKey(handlerID); 58f200777290d2e3e8b580c512cc0808eae9790705Andreas Huber 59f200777290d2e3e8b580c512cc0808eae9790705Andreas Huber if (index < 0) { 60f200777290d2e3e8b580c512cc0808eae9790705Andreas Huber return; 61f200777290d2e3e8b580c512cc0808eae9790705Andreas Huber } 6272961230a5890071bcca436eb5630172ce84ec41Andreas Huber 6372961230a5890071bcca436eb5630172ce84ec41Andreas Huber const HandlerInfo &info = mHandlers.valueAt(index); 6411cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber 6511cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber sp<AHandler> handler = info.mHandler.promote(); 6611cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber 6711cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber if (handler != NULL) { 6811cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber handler->setID(0); 6911cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber } 7072961230a5890071bcca436eb5630172ce84ec41Andreas Huber 7172961230a5890071bcca436eb5630172ce84ec41Andreas Huber mHandlers.removeItemsAt(index); 7272961230a5890071bcca436eb5630172ce84ec41Andreas Huber} 7372961230a5890071bcca436eb5630172ce84ec41Andreas Huber 7430873bfd08255e2c4e98ff5732ffff2838772617Andreas Hubervoid ALooperRoster::unregisterStaleHandlers() { 7530873bfd08255e2c4e98ff5732ffff2838772617Andreas Huber 7675c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen Vector<sp<ALooper> > activeLoopers; 7775c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen { 7875c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen Mutex::Autolock autoLock(mLock); 7975c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen 8075c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen for (size_t i = mHandlers.size(); i-- > 0;) { 8175c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen const HandlerInfo &info = mHandlers.valueAt(i); 8275c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen 8375c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen sp<ALooper> looper = info.mLooper.promote(); 8475c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen if (looper == NULL) { 8575c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen ALOGV("Unregistering stale handler %d", mHandlers.keyAt(i)); 8675c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen mHandlers.removeItemsAt(i); 8775c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen } else { 8875c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen // At this point 'looper' might be the only sp<> keeping 8975c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen // the object alive. To prevent it from going out of scope 9075c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen // and having ~ALooper call this method again recursively 9175c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen // and then deadlocking because of the Autolock above, add 9275c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen // it to a Vector which will go out of scope after the lock 9375c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen // has been released. 9475c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen activeLoopers.add(looper); 9575c672fc376ef9b3ceff61a96513242b0e5ebd60Marco Nelissen } 9630873bfd08255e2c4e98ff5732ffff2838772617Andreas Huber } 9730873bfd08255e2c4e98ff5732ffff2838772617Andreas Huber } 9830873bfd08255e2c4e98ff5732ffff2838772617Andreas Huber} 9930873bfd08255e2c4e98ff5732ffff2838772617Andreas Huber 1005df775d2f509c76e76a46615fca83dba95299f6eAndreas Huberstatus_t ALooperRoster::postMessage( 10172961230a5890071bcca436eb5630172ce84ec41Andreas Huber const sp<AMessage> &msg, int64_t delayUs) { 10272961230a5890071bcca436eb5630172ce84ec41Andreas Huber 103047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen sp<ALooper> looper = findLooper(msg->target()); 10411cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber 10511cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber if (looper == NULL) { 1065df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber return -ENOENT; 10711cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber } 10811cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber looper->post(msg, delayUs); 1095df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber return OK; 11072961230a5890071bcca436eb5630172ce84ec41Andreas Huber} 11172961230a5890071bcca436eb5630172ce84ec41Andreas Huber 11272961230a5890071bcca436eb5630172ce84ec41Andreas Hubervoid ALooperRoster::deliverMessage(const sp<AMessage> &msg) { 11372961230a5890071bcca436eb5630172ce84ec41Andreas Huber sp<AHandler> handler; 11472961230a5890071bcca436eb5630172ce84ec41Andreas Huber 11572961230a5890071bcca436eb5630172ce84ec41Andreas Huber { 11672961230a5890071bcca436eb5630172ce84ec41Andreas Huber Mutex::Autolock autoLock(mLock); 11772961230a5890071bcca436eb5630172ce84ec41Andreas Huber 11872961230a5890071bcca436eb5630172ce84ec41Andreas Huber ssize_t index = mHandlers.indexOfKey(msg->target()); 11972961230a5890071bcca436eb5630172ce84ec41Andreas Huber 12072961230a5890071bcca436eb5630172ce84ec41Andreas Huber if (index < 0) { 1215ff1dd576bb93c45b44088a51544a18fc43ebf58Steve Block ALOGW("failed to deliver message. Target handler not registered."); 12272961230a5890071bcca436eb5630172ce84ec41Andreas Huber return; 12372961230a5890071bcca436eb5630172ce84ec41Andreas Huber } 12472961230a5890071bcca436eb5630172ce84ec41Andreas Huber 12572961230a5890071bcca436eb5630172ce84ec41Andreas Huber const HandlerInfo &info = mHandlers.valueAt(index); 12611cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber handler = info.mHandler.promote(); 12711cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber 12811cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber if (handler == NULL) { 1295ff1dd576bb93c45b44088a51544a18fc43ebf58Steve Block ALOGW("failed to deliver message. " 130f200777290d2e3e8b580c512cc0808eae9790705Andreas Huber "Target handler %d registered, but object gone.", 131f200777290d2e3e8b580c512cc0808eae9790705Andreas Huber msg->target()); 13211cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber 13311cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber mHandlers.removeItemsAt(index); 13411cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber return; 13511cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber } 13672961230a5890071bcca436eb5630172ce84ec41Andreas Huber } 13772961230a5890071bcca436eb5630172ce84ec41Andreas Huber 13872961230a5890071bcca436eb5630172ce84ec41Andreas Huber handler->onMessageReceived(msg); 13972961230a5890071bcca436eb5630172ce84ec41Andreas Huber} 14072961230a5890071bcca436eb5630172ce84ec41Andreas Huber 141e2b20987c2652a984d10520ef3542d50d91119c5Andreas Hubersp<ALooper> ALooperRoster::findLooper(ALooper::handler_id handlerID) { 142e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber Mutex::Autolock autoLock(mLock); 143e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber 144e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber ssize_t index = mHandlers.indexOfKey(handlerID); 145e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber 146e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber if (index < 0) { 147e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber return NULL; 148e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber } 149e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber 15011cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber sp<ALooper> looper = mHandlers.valueAt(index).mLooper.promote(); 15111cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber 15211cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber if (looper == NULL) { 15311cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber mHandlers.removeItemsAt(index); 15411cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber return NULL; 15511cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber } 15611cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber 15711cc270ac5fd522c9e6491a7933516a96da4f62eAndreas Huber return looper; 158e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber} 159e2b20987c2652a984d10520ef3542d50d91119c5Andreas Huber 1605df775d2f509c76e76a46615fca83dba95299f6eAndreas Huberstatus_t ALooperRoster::postAndAwaitResponse( 1615df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber const sp<AMessage> &msg, sp<AMessage> *response) { 162047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen sp<ALooper> looper = findLooper(msg->target()); 163047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen 164047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen if (looper == NULL) { 165047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen ALOGW("failed to post message. " 166047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen "Target handler %d still registered, but object gone.", 167047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen msg->target()); 168047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen response->clear(); 169047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen return -ENOENT; 170047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen } 171047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen 1725df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber Mutex::Autolock autoLock(mLock); 1735df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 1745df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber uint32_t replyID = mNextReplyID++; 1755df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 1765df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber msg->setInt32("replyID", replyID); 1775df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 178047dd13ca42ff7cea10821ef64eb09229fa3e751Marco Nelissen looper->post(msg, 0 /* delayUs */); 1795df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 1805df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber ssize_t index; 1815df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber while ((index = mReplies.indexOfKey(replyID)) < 0) { 1825df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber mRepliesCondition.wait(mLock); 1835df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber } 1845df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 1855df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber *response = mReplies.valueAt(index); 1865df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber mReplies.removeItemsAt(index); 1875df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 1885df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber return OK; 1895df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber} 1905df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 1915df775d2f509c76e76a46615fca83dba95299f6eAndreas Hubervoid ALooperRoster::postReply(uint32_t replyID, const sp<AMessage> &reply) { 1925df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber Mutex::Autolock autoLock(mLock); 1935df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 1945df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber CHECK(mReplies.indexOfKey(replyID) < 0); 1955df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber mReplies.add(replyID, reply); 1965df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber mRepliesCondition.broadcast(); 1975df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber} 1985df775d2f509c76e76a46615fca83dba95299f6eAndreas Huber 19972961230a5890071bcca436eb5630172ce84ec41Andreas Huber} // namespace android 200