1 files changed, 87 insertions, 5 deletions

diff --git a/indra/llcommon/llthread.h b/indra/llcommon/llthread.h
index 93c752754d..94b6b6d682 100644
--- a/indra/llcommon/llthread.h
+++ b/indra/llcommon/llthread.h
@@ -89,6 +89,11 @@ public:
 
 	U32 getID() const { return mID; }
 
+	// Called by threads *not* created via LLThread to register some
+	// internal state used by LLMutex.  You must call this once early
+	// in the running thread to prevent collisions with the main thread.
+	static void registerThreadID();
+	
 private:
 	BOOL				mPaused;
 	
@@ -98,6 +103,7 @@ private:
 protected:
 	std::string			mName;
 	class LLCondition*	mRunCondition;
+	LLMutex*			mDataLock;
 
 	apr_thread_t		*mAPRThreadp;
 	apr_pool_t			*mAPRPoolp;
@@ -123,29 +129,105 @@ protected:
 	inline void unlockData();
 	
 	// This is the predicate that decides whether the thread should sleep.  
-	// It should only be called with mRunCondition locked, since the virtual runCondition() function may need to access
+	// It should only be called with mDataLock locked, since the virtual runCondition() function may need to access
 	// data structures that are thread-unsafe.
 	bool shouldSleep(void) { return (mStatus == RUNNING) && (isPaused() || (!runCondition())); }
 
 	// To avoid spurious signals (and the associated context switches) when the condition may or may not have changed, you can do the following:
-	// mRunCondition->lock();
+	// mDataLock->lock();
 	// if(!shouldSleep())
 	//     mRunCondition->signal();
-	// mRunCondition->unlock();
+	// mDataLock->unlock();
 };
 
 
 void LLThread::lockData()
 {
-	mRunCondition->lock();
+	mDataLock->lock();
 }
 
 void LLThread::unlockData()
 {
-	mRunCondition->unlock();
+	mDataLock->unlock();
 }
 
 
 //============================================================================
 
+// see llmemory.h for LLPointer<> definition
+
+class LL_COMMON_API LLThreadSafeRefCount
+{
+public:
+	static void initThreadSafeRefCount(); // creates sMutex
+	static void cleanupThreadSafeRefCount(); // destroys sMutex
+	
+private:
+	static LLMutex* sMutex;
+
+protected:
+	virtual ~LLThreadSafeRefCount(); // use unref()
+	
+public:
+	LLThreadSafeRefCount();
+	LLThreadSafeRefCount(const LLThreadSafeRefCount&);
+	LLThreadSafeRefCount& operator=(const LLThreadSafeRefCount& ref) 
+	{
+		if (sMutex)
+		{
+			sMutex->lock();
+		}
+		mRef = 0;
+		if (sMutex)
+		{
+			sMutex->unlock();
+		}
+		return *this;
+	}
+
+
+	
+	void ref()
+	{
+		if (sMutex) sMutex->lock();
+		mRef++; 
+		if (sMutex) sMutex->unlock();
+	} 
+
+	S32 unref()
+	{
+		llassert(mRef >= 1);
+		if (sMutex) sMutex->lock();
+		S32 res = --mRef;
+		if (sMutex) sMutex->unlock();
+		if (0 == res) 
+		{
+			delete this; 
+			return 0;
+		}
+		return res;
+	}	
+	S32 getNumRefs() const
+	{
+		return mRef;
+	}
+
+private: 
+	S32	mRef; 
+};
+
+//============================================================================
+
+// Simple responder for self destructing callbacks
+// Pure virtual class
+class LL_COMMON_API LLResponder : public LLThreadSafeRefCount
+{
+protected:
+	virtual ~LLResponder();
+public:
+	virtual void completed(bool success) = 0;
+};
+
+//============================================================================
+
 #endif // LL_LLTHREAD_H