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Diffstat (limited to 'services/common_time/common_clock_service.h')
-rw-r--r-- | services/common_time/common_clock_service.h | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/services/common_time/common_clock_service.h b/services/common_time/common_clock_service.h deleted file mode 100644 index bd663f0..0000000 --- a/services/common_time/common_clock_service.h +++ /dev/null @@ -1,91 +0,0 @@ -/* - * Copyright (C) 2011 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. - */ - -#ifndef ANDROID_COMMON_CLOCK_SERVICE_H -#define ANDROID_COMMON_CLOCK_SERVICE_H - -#include <sys/socket.h> -#include <common_time/ICommonClock.h> - -namespace android { - -class CommonTimeServer; - -class CommonClockService : public BnCommonClock, - public android::IBinder::DeathRecipient { - public: - static sp<CommonClockService> instantiate(CommonTimeServer& timeServer); - - virtual status_t dump(int fd, const Vector<String16>& args); - - virtual status_t isCommonTimeValid(bool* valid, uint32_t *timelineID); - virtual status_t commonTimeToLocalTime(int64_t common_time, - int64_t* local_time); - virtual status_t localTimeToCommonTime(int64_t local_time, - int64_t* common_time); - virtual status_t getCommonTime(int64_t* common_time); - virtual status_t getCommonFreq(uint64_t* freq); - virtual status_t getLocalTime(int64_t* local_time); - virtual status_t getLocalFreq(uint64_t* freq); - virtual status_t getEstimatedError(int32_t* estimate); - virtual status_t getTimelineID(uint64_t* id); - virtual status_t getState(ICommonClock::State* state); - virtual status_t getMasterAddr(struct sockaddr_storage* addr); - - virtual status_t registerListener( - const sp<ICommonClockListener>& listener); - virtual status_t unregisterListener( - const sp<ICommonClockListener>& listener); - - void notifyOnTimelineChanged(uint64_t timelineID); - - private: - CommonClockService(CommonTimeServer& timeServer) - : mTimeServer(timeServer) { }; - - virtual void binderDied(const wp<IBinder>& who); - - CommonTimeServer& mTimeServer; - - // locks used to synchronize access to the list of registered listeners. - // The callback lock is held whenever the list is used to perform callbacks - // or while the list is being modified. The registration lock used to - // serialize access across registerListener, unregisterListener, and - // binderDied. - // - // The reason for two locks is that registerListener, unregisterListener, - // and binderDied each call into the core service and obtain the core - // service thread lock when they call reevaluateAutoDisableState. The core - // service thread obtains the main thread lock whenever its thread is - // running, and sometimes needs to call notifyOnTimelineChanged which then - // obtains the callback lock. If callers of registration functions were - // holding the callback lock when they called into the core service, we - // would have a classic A/B, B/A ordering deadlock. To avoid this, the - // registration functions hold the registration lock for the duration of - // their call, but hold the callback lock only while they mutate the list. - // This way, the list's size cannot change (because of the registration - // lock) during the call into reevaluateAutoDisableState, but the core work - // thread can still safely call notifyOnTimelineChanged while holding the - // main thread lock. - Mutex mCallbackLock; - Mutex mRegistrationLock; - - Vector<sp<ICommonClockListener> > mListeners; -}; - -}; // namespace android - -#endif // ANDROID_COMMON_CLOCK_SERVICE_H |