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author | James Dong <jdong@google.com> | 2010-01-15 18:13:58 -0800 |
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committer | James Dong <jdong@google.com> | 2010-01-15 18:28:16 -0800 |
commit | 34bbc22cbca0004475788f06be2300fef23c6a52 (patch) | |
tree | 26d71e931f448d722f0712b6a6c80886b7947cbe /media/libmedia/IMediaDeathNotifier.cpp | |
parent | dded6447b53a43702f252b14972b4fe825642f1e (diff) | |
download | frameworks_base-34bbc22cbca0004475788f06be2300fef23c6a52.zip frameworks_base-34bbc22cbca0004475788f06be2300fef23c6a52.tar.gz frameworks_base-34bbc22cbca0004475788f06be2300fef23c6a52.tar.bz2 |
Media server death nodification
Diffstat (limited to 'media/libmedia/IMediaDeathNotifier.cpp')
-rw-r--r-- | media/libmedia/IMediaDeathNotifier.cpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/media/libmedia/IMediaDeathNotifier.cpp b/media/libmedia/IMediaDeathNotifier.cpp new file mode 100644 index 0000000..39ac076 --- /dev/null +++ b/media/libmedia/IMediaDeathNotifier.cpp @@ -0,0 +1,111 @@ +/* +** Copyright 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 "IMediaDeathNotifier" +#include <utils/Log.h> + +#include <binder/IServiceManager.h> +#include <binder/IPCThreadState.h> +#include <media/IMediaDeathNotifier.h> + +namespace android { + +// client singleton for binder interface to services +Mutex IMediaDeathNotifier::sServiceLock; +sp<IMediaPlayerService> IMediaDeathNotifier::sMediaPlayerService; +sp<IMediaDeathNotifier::DeathNotifier> IMediaDeathNotifier::sDeathNotifier; +SortedVector< wp<IMediaDeathNotifier> > IMediaDeathNotifier::sObitRecipients; + +// establish binder interface to MediaPlayerService +/*static*/const sp<IMediaPlayerService>& +IMediaDeathNotifier::getMediaPlayerService() +{ + LOGV("getMediaPlayerService"); + Mutex::Autolock _l(sServiceLock); + if (sMediaPlayerService.get() == 0) { + sp<IServiceManager> sm = defaultServiceManager(); + sp<IBinder> binder; + do { + binder = sm->getService(String16("media.player")); + if (binder != 0) { + break; + } + LOGW("Media player service not published, waiting..."); + usleep(500000); // 0.5 s + } while(true); + + if (sDeathNotifier == NULL) { + sDeathNotifier = new DeathNotifier(); + } + binder->linkToDeath(sDeathNotifier); + sMediaPlayerService = interface_cast<IMediaPlayerService>(binder); + } + LOGE_IF(sMediaPlayerService == 0, "no media player service!?"); + return sMediaPlayerService; +} + +/*static*/ void +IMediaDeathNotifier::addObitRecipient(const wp<IMediaDeathNotifier>& recipient) +{ + LOGV("addObitRecipient"); + Mutex::Autolock _l(sServiceLock); + sObitRecipients.add(recipient); +} + +/*static*/ void +IMediaDeathNotifier::removeObitRecipient(const wp<IMediaDeathNotifier>& recipient) +{ + LOGV("removeObitRecipient"); + Mutex::Autolock _l(sServiceLock); + sObitRecipients.remove(recipient); +} + +void +IMediaDeathNotifier::DeathNotifier::binderDied(const wp<IBinder>& who) { + LOGW("media server died"); + + // Need to do this with the lock held + SortedVector< wp<IMediaDeathNotifier> > list; + { + Mutex::Autolock _l(sServiceLock); + sMediaPlayerService.clear(); + list = sObitRecipients; + } + + // Notify application when media server dies. + // Don't hold the static lock during callback in case app + // makes a call that needs the lock. + size_t count = list.size(); + for (size_t iter = 0; iter < count; ++iter) { + sp<IMediaDeathNotifier> notifier = list[iter].promote(); + if (notifier != 0) { + notifier->died(); + } + } +} + +IMediaDeathNotifier::DeathNotifier::~DeathNotifier() +{ + LOGV("DeathNotifier::~DeathNotifier"); + Mutex::Autolock _l(sServiceLock); + sObitRecipients.clear(); + if (sMediaPlayerService != 0) { + sMediaPlayerService->asBinder()->unlinkToDeath(this); + } +} + +}; // namespace android |