michael@0: /*
michael@0: ** Copyright 2010, The Android Open Source Project
michael@0: ** Copyright 2013, Mozilla Foundation
michael@0: **
michael@0: ** Licensed under the Apache License, Version 2.0 (the "License");
michael@0: ** you may not use this file except in compliance with the License.
michael@0: ** You may obtain a copy of the License at
michael@0: **
michael@0: **     http://www.apache.org/licenses/LICENSE-2.0
michael@0: **
michael@0: ** Unless required by applicable law or agreed to in writing, software
michael@0: ** distributed under the License is distributed on an "AS IS" BASIS,
michael@0: ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0: ** See the License for the specific language governing permissions and
michael@0: ** limitations under the License.
michael@0: */
michael@0: 
michael@0: //#define LOG_NDEBUG 0
michael@0: #define LOG_TAG "IMediaResourceManagerDeathNotifier"
michael@0: #include <utils/Log.h>
michael@0: 
michael@0: #include <binder/IServiceManager.h>
michael@0: #include <binder/IPCThreadState.h>
michael@0: 
michael@0: #include "IMediaResourceManagerDeathNotifier.h"
michael@0: 
michael@0: #define DN_LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)
michael@0: #define DN_LOGW(...) __android_log_print(ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)
michael@0: #define DN_LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
michael@0: #define DN_LOGE_IF(cond, ...) \
michael@0:     ( (CONDITION(cond)) \
michael@0:     ? ((void)__android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)) \
michael@0:     : (void)0 )
michael@0: 
michael@0: namespace android {
michael@0: 
michael@0: // client singleton for binder interface to services
michael@0: Mutex IMediaResourceManagerDeathNotifier::sServiceLock;
michael@0: sp<IMediaResourceManagerService> IMediaResourceManagerDeathNotifier::sMediaResourceManagerService;
michael@0: sp<IMediaResourceManagerDeathNotifier::DeathNotifier> IMediaResourceManagerDeathNotifier::sDeathNotifier;
michael@0: SortedVector< wp<IMediaResourceManagerDeathNotifier> > IMediaResourceManagerDeathNotifier::sObitRecipients;
michael@0: 
michael@0: // establish binder interface to MediaResourceManagerService
michael@0: /*static*/const sp<IMediaResourceManagerService>&
michael@0: IMediaResourceManagerDeathNotifier::getMediaResourceManagerService()
michael@0: {
michael@0:     DN_LOGV("getMediaResourceManagerService");
michael@0:     Mutex::Autolock _l(sServiceLock);
michael@0:     if (sMediaResourceManagerService.get() == 0) {
michael@0:         sp<IServiceManager> sm = defaultServiceManager();
michael@0:         sp<IBinder> binder;
michael@0:         do {
michael@0:             binder = sm->getService(String16("media.resource_manager"));
michael@0:             if (binder != 0) {
michael@0:                 break;
michael@0:              }
michael@0:              DN_LOGW("Media resource manager service not published, waiting...");
michael@0:              usleep(500000); // 0.5 s
michael@0:         } while(true);
michael@0: 
michael@0:         if (sDeathNotifier == NULL) {
michael@0:         sDeathNotifier = new DeathNotifier();
michael@0:     }
michael@0:     binder->linkToDeath(sDeathNotifier);
michael@0:     sMediaResourceManagerService = interface_cast<IMediaResourceManagerService>(binder);
michael@0:     }
michael@0:     DN_LOGE_IF(sMediaResourceManagerService == 0, "no media player service!?");
michael@0:     return sMediaResourceManagerService;
michael@0: }
michael@0: 
michael@0: /*static*/ void
michael@0: IMediaResourceManagerDeathNotifier::addObitRecipient(const wp<IMediaResourceManagerDeathNotifier>& recipient)
michael@0: {
michael@0:     Mutex::Autolock _l(sServiceLock);
michael@0:     sObitRecipients.add(recipient);
michael@0: }
michael@0: 
michael@0: /*static*/ void
michael@0: IMediaResourceManagerDeathNotifier::removeObitRecipient(const wp<IMediaResourceManagerDeathNotifier>& recipient)
michael@0: {
michael@0:     Mutex::Autolock _l(sServiceLock);
michael@0:     sObitRecipients.remove(recipient);
michael@0: }
michael@0: 
michael@0: void
michael@0: IMediaResourceManagerDeathNotifier::DeathNotifier::binderDied(const wp<IBinder>& who)
michael@0: {
michael@0:     DN_LOGW("media resource manager service died");
michael@0:     // Need to do this with the lock held
michael@0:     SortedVector< wp<IMediaResourceManagerDeathNotifier> > list;
michael@0:     {
michael@0:         Mutex::Autolock _l(sServiceLock);
michael@0:         sMediaResourceManagerService.clear();
michael@0:         list = sObitRecipients;
michael@0:     }
michael@0: 
michael@0:     // Notify application when media server dies.
michael@0:     // Don't hold the static lock during callback in case app
michael@0:     // makes a call that needs the lock.
michael@0:     size_t count = list.size();
michael@0:     for (size_t iter = 0; iter < count; ++iter) {
michael@0:         sp<IMediaResourceManagerDeathNotifier> notifier = list[iter].promote();
michael@0:         if (notifier != 0) {
michael@0:             notifier->died();
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: IMediaResourceManagerDeathNotifier::DeathNotifier::~DeathNotifier()
michael@0: {
michael@0:     Mutex::Autolock _l(sServiceLock);
michael@0:     sObitRecipients.clear();
michael@0:     if (sMediaResourceManagerService != 0) {
michael@0:         sMediaResourceManagerService->asBinder()->unlinkToDeath(this);
michael@0:     }
michael@0: }
michael@0: 
michael@0: }; // namespace android