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author | Glenn Kasten <gkasten@google.com> | 2014-01-17 12:09:05 -0800 |
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committer | Glenn Kasten <gkasten@google.com> | 2014-03-25 15:42:35 -0700 |
commit | bcefec31bd1346133052356ffc8d7ac8a5b13fab (patch) | |
tree | 4125808fe2bbae00a8bf93ba260688e2f7c11181 /services/audioflinger/AudioFlinger.h | |
parent | 1392eb3d1802e9f894f87d7a7387207d1b6faca1 (diff) | |
download | frameworks_av-bcefec31bd1346133052356ffc8d7ac8a5b13fab.zip frameworks_av-bcefec31bd1346133052356ffc8d7ac8a5b13fab.tar.gz frameworks_av-bcefec31bd1346133052356ffc8d7ac8a5b13fab.tar.bz2 |
Document AudioFlinger::nextUniqueId()
Change-Id: Iafe96f1c10bd85cb23a2553945ca68aa601dc2eb
Diffstat (limited to 'services/audioflinger/AudioFlinger.h')
-rw-r--r-- | services/audioflinger/AudioFlinger.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h index 2367d7d..ec32edd 100644 --- a/services/audioflinger/AudioFlinger.h +++ b/services/audioflinger/AudioFlinger.h @@ -454,7 +454,14 @@ private: { return mStreamTypes[stream].volume; } void audioConfigChanged_l(int event, audio_io_handle_t ioHandle, const void *param2); - // allocate an audio_io_handle_t, session ID, or effect ID + // Allocate an audio_io_handle_t, session ID, effect ID, or audio_module_handle_t. + // They all share the same ID space, but the namespaces are actually independent + // because there are separate KeyedVectors for each kind of ID. + // The return value is uint32_t, but is cast to signed for some IDs. + // FIXME This API does not handle rollover to zero (for unsigned IDs), + // or from positive to negative (for signed IDs). + // Thus it may fail by returning an ID of the wrong sign, + // or by returning a non-unique ID. uint32_t nextUniqueId(); status_t moveEffectChain_l(int sessionId, @@ -590,7 +597,11 @@ private: DefaultKeyedVector< audio_io_handle_t, sp<RecordThread> > mRecordThreads; DefaultKeyedVector< pid_t, sp<NotificationClient> > mNotificationClients; + volatile int32_t mNextUniqueId; // updated by android_atomic_inc + // nextUniqueId() returns uint32_t, but this is declared int32_t + // because the atomic operations require an int32_t + audio_mode_t mMode; bool mBtNrecIsOff; |