give each RageSound instance a unique ID

stepmania/src/RageSound.cpp

@@ -75,8 +75,8 @@ RageSound::RageSound()
 	playing = false;
 	databuf.reserve(internal_buffer_size);
 
-	/* Register ourselves, so we receive Update()s. */
-	SOUNDMAN->all_sounds.insert(this);
+	/* Register ourself, so we have a unique ID and receive Update()s. */
+	ID = SOUNDMAN->RegisterSound( this );
 }
 
 RageSound::~RageSound()
@@ -88,10 +88,8 @@ RageSound::~RageSound()
 
 	Unload();
 
-	/* Unregister ourselves. */
-	SOUNDMAN->lock.Lock();
-	SOUNDMAN->all_sounds.erase(this);
-	SOUNDMAN->lock.Unlock();
+	/* Unregister ourself. */
+	SOUNDMAN->UnregisterSound( this );
 }
 
 RageSound::RageSound(const RageSound &cpy):
@@ -114,8 +112,9 @@ RageSound::RageSound(const RageSound &cpy):
 	 * copy this down here. */
 	m_sFilePath = cpy.m_sFilePath;
 
-	/* Register ourselves, so we receive Update()s. */
-	SOUNDMAN->all_sounds.insert(this);
+	/* Register ourselves, so we receive Update()s.  We have a different ID than
+	 * our parent. */
+	ID = SOUNDMAN->RegisterSound( this );
 }
 
 void RageSound::Unload()

stepmania/src/RageSound.h

@@ -17,6 +17,7 @@ public:
 	virtual int GetSampleRate() const = 0;
 	virtual RageTimer GetStartTime() const { return RageZeroTimer; }
 	virtual float GetVolume() const = 0;
+	virtual int GetID() const = 0;
 	virtual CString GetLoadedFilePath() const = 0;
 };
 
@@ -106,6 +107,7 @@ public:
 	float GetPlaybackRate() const;
 	RageTimer GetStartTime() const;
 	float GetVolume() const;
+	int GetID() const { return ID; }
 	void SetParams( const RageSoundParams &p );
 	const RageSoundParams &GetParams() const { return m_Param; }
 
@@ -152,6 +154,9 @@ private:
 	int64_t stopped_position;
 	bool    playing;
 
+	/* Unique ID number for this instance of RageSound. */
+	int ID;
+
 	CString error;
 
 	int64_t GetPositionSecondsInternal( bool *approximate=NULL ) const;

stepmania/src/RageSoundManager.cpp

@@ -88,6 +88,23 @@ void RageSoundManager::Update(float delta)
 	driver->Update(delta);
 }
 
+/* Register the given sound, and return a unique ID. */
+int RageSoundManager::RegisterSound( RageSound *p )
+{
+	LockMut(lock);
+
+	all_sounds.insert( p );
+
+	static int iID = 0;
+	return ++iID;
+}
+
+void RageSoundManager::UnregisterSound( RageSound *p )
+{
+	LockMut(lock);
+	all_sounds.erase( p );
+}
+
 float RageSoundManager::GetPlayLatency() const
 {
 	return driver->GetPlayLatency();

stepmania/src/RageSoundManager.h

@@ -38,6 +38,8 @@ public:
 	void StartMixing( RageSoundBase *snd );	/* used by RageSound */
 	void StopMixing( RageSoundBase *snd );	/* used by RageSound */
 	int64_t GetPosition( const RageSoundBase *snd ) const;	/* used by RageSound */
+	int RegisterSound( RageSound *p );		/* used by RageSound */
+	void UnregisterSound( RageSound *p );	/* used by RageSound */
 	float GetPlayLatency() const;
 	int GetDriverSampleRate( int rate ) const;
 	const set<RageSound *> &GetPlayingSounds() const { return playing_sounds; }