12 files changed, 521 insertions, 263 deletions

diff --git a/indra/llcommon/CMakeLists.txt b/indra/llcommon/CMakeLists.txt
index e7aaf3c984..f785698612 100644
--- a/indra/llcommon/CMakeLists.txt
+++ b/indra/llcommon/CMakeLists.txt
@@ -50,6 +50,7 @@ set(llcommon_SOURCE_FILES
     llfile.cpp
     llfindlocale.cpp
     llfixedbuffer.cpp
+    llfoldertype.cpp
     llformat.cpp
     llframetimer.cpp
     llheartbeat.cpp
@@ -150,6 +151,7 @@ set(llcommon_HEADER_FILES
     llfile.h
     llfindlocale.h
     llfixedbuffer.h
+    llfoldertype.h
     llformat.h
     llframetimer.h
     llhash.h
diff --git a/indra/llcommon/llapr.cpp b/indra/llcommon/llapr.cpp
index 669afc5330..ed70b1d9f2 100644
--- a/indra/llcommon/llapr.cpp
+++ b/indra/llcommon/llapr.cpp
@@ -57,7 +57,7 @@ void ll_init_apr()
 
 	if(!LLAPRFile::sAPRFilePoolp)
 	{
-		LLAPRFile::sAPRFilePoolp = new LLVolatileAPRPool() ;
+		LLAPRFile::sAPRFilePoolp = new LLVolatileAPRPool(FALSE) ;
 	}
 }
 
@@ -99,13 +99,12 @@ void ll_cleanup_apr()
 //
 //LLAPRPool
 //
-LLAPRPool::LLAPRPool(apr_pool_t *parent, apr_size_t size, BOOL releasePoolFlag) 
-{
-	mParent = parent ;
-	mReleasePoolFlag = releasePoolFlag ;
-	mMaxSize = size ;
-	mPool = NULL ;
-
+LLAPRPool::LLAPRPool(apr_pool_t *parent, apr_size_t size, BOOL releasePoolFlag) 	
+	: mParent(parent),
+	mReleasePoolFlag(releasePoolFlag),
+	mMaxSize(size),
+	mPool(NULL)
+{	
 	createAPRPool() ;
 }
 
@@ -148,31 +147,65 @@ void LLAPRPool::releaseAPRPool()
 	}
 }
 
+//virtual
 apr_pool_t* LLAPRPool::getAPRPool() 
+{	
+	return mPool ; 
+}
+
+LLVolatileAPRPool::LLVolatileAPRPool(BOOL is_local, apr_pool_t *parent, apr_size_t size, BOOL releasePoolFlag) 
+				  : LLAPRPool(parent, size, releasePoolFlag),
+				  mNumActiveRef(0),
+				  mNumTotalRef(0),
+				  mMutexPool(NULL),
+				  mMutexp(NULL)
 {
-	if(!mPool)
+	//create mutex
+	if(!is_local) //not a local apr_pool, that is: shared by multiple threads.
 	{
-		createAPRPool() ;
+		apr_pool_create(&mMutexPool, NULL); // Create a pool for mutex
+		apr_thread_mutex_create(&mMutexp, APR_THREAD_MUTEX_UNNESTED, mMutexPool);
 	}
-	
-	return mPool ; 
 }
-LLVolatileAPRPool::LLVolatileAPRPool(apr_pool_t *parent, apr_size_t size, BOOL releasePoolFlag) 
-				  : LLAPRPool(parent, size, releasePoolFlag)
+
+LLVolatileAPRPool::~LLVolatileAPRPool()
 {
-	mNumActiveRef = 0 ;
-	mNumTotalRef = 0 ;
+	//delete mutex
+	if(mMutexp)
+	{
+		apr_thread_mutex_destroy(mMutexp);
+		apr_pool_destroy(mMutexPool);
+	}
 }
 
-apr_pool_t* LLVolatileAPRPool::getVolatileAPRPool() 
+//
+//define this virtual function to avoid any mistakenly calling LLAPRPool::getAPRPool().
+//
+//virtual 
+apr_pool_t* LLVolatileAPRPool::getAPRPool() 
 {
+	return LLVolatileAPRPool::getVolatileAPRPool() ;
+}
+
+apr_pool_t* LLVolatileAPRPool::getVolatileAPRPool() 
+{	
+	LLScopedLock lock(mMutexp) ;
+
 	mNumTotalRef++ ;
 	mNumActiveRef++ ;
-	return getAPRPool() ;
+
+	if(!mPool)
+	{
+		createAPRPool() ;
+	}
+	
+	return mPool ;
 }
 
 void LLVolatileAPRPool::clearVolatileAPRPool() 
 {
+	LLScopedLock lock(mMutexp) ;
+
 	if(mNumActiveRef > 0)
 	{
 		mNumActiveRef--;
@@ -251,10 +284,9 @@ void LLScopedLock::unlock()
 bool ll_apr_warn_status(apr_status_t status)
 {
 	if(APR_SUCCESS == status) return false;
-#ifndef LL_WINDOWS
 	char buf[MAX_STRING];	/* Flawfinder: ignore */
-	LL_WARNS_ONCE("APR") << "APR: " << apr_strerror(status, buf, MAX_STRING) << LL_ENDL;
-#endif
+	apr_strerror(status, buf, MAX_STRING);
+	LL_WARNS("APR") << "APR: " << buf << LL_ENDL;
 	return true;
 }
 
@@ -268,10 +300,18 @@ void ll_apr_assert_status(apr_status_t status)
 // LLAPRFile functions
 //
 LLAPRFile::LLAPRFile()
+	: mFile(NULL),
+	  mCurrentFilePoolp(NULL)
+{
+}
+
+LLAPRFile::LLAPRFile(const std::string& filename, apr_int32_t flags, LLVolatileAPRPool* pool)
+	: mFile(NULL),
+	  mCurrentFilePoolp(NULL)
 {
-	mFile = NULL ;
-	mCurrentFilePoolp = NULL ;
+	open(filename, flags, pool);
 }
+
 LLAPRFile::~LLAPRFile()
 {
 	close() ;
@@ -295,11 +335,40 @@ apr_status_t LLAPRFile::close()
 	return ret ;
 }
 
-apr_status_t LLAPRFile::open(LLVolatileAPRPool* pool, const std::string& filename, apr_int32_t flags, S32* sizep)
+apr_status_t LLAPRFile::open(const std::string& filename, apr_int32_t flags, LLVolatileAPRPool* pool, S32* sizep)
 {
 	apr_status_t s ;
-	s = open(filename, flags, pool ? pool->getVolatileAPRPool() : NULL, sizep) ;
+
+	//check if already open some file
+	llassert_always(!mFile) ;
+	llassert_always(!mCurrentFilePoolp) ;
 	
+	apr_pool_t* apr_pool = pool ? pool->getVolatileAPRPool() : NULL ;
+	s = apr_file_open(&mFile, filename.c_str(), flags, APR_OS_DEFAULT, getAPRFilePool(apr_pool));
+
+	if (s != APR_SUCCESS || !mFile)
+	{
+		mFile = NULL ;
+		
+		if (sizep)
+		{
+			*sizep = 0;
+		}
+	}
+	else if (sizep)
+	{
+		S32 file_size = 0;
+		apr_off_t offset = 0;
+		if (apr_file_seek(mFile, APR_END, &offset) == APR_SUCCESS)
+		{
+			llassert_always(offset <= 0x7fffffff);
+			file_size = (S32)offset;
+			offset = 0;
+			apr_file_seek(mFile, APR_SET, &offset);
+		}
+		*sizep = file_size;
+	}
+
 	if(!mCurrentFilePoolp)
 	{
 		mCurrentFilePoolp = pool ;
@@ -312,40 +381,25 @@ apr_status_t LLAPRFile::open(LLVolatileAPRPool* pool, const std::string& filenam
 
 	return s ;
 }
-apr_status_t LLAPRFile::open(const std::string& filename, apr_int32_t flags, apr_pool_t* pool, S32* sizep)
+
+//use gAPRPoolp.
+apr_status_t LLAPRFile::open(const std::string& filename, apr_int32_t flags, BOOL use_global_pool)
 {
 	apr_status_t s;
 
 	//check if already open some file
 	llassert_always(!mFile) ;
 	llassert_always(!mCurrentFilePoolp) ;
+	llassert_always(use_global_pool) ; //be aware of using gAPRPoolp.
 	
-	s = apr_file_open(&mFile, filename.c_str(), flags, APR_OS_DEFAULT, getAPRFilePool(pool));
+	s = apr_file_open(&mFile, filename.c_str(), flags, APR_OS_DEFAULT, gAPRPoolp);
 	if (s != APR_SUCCESS || !mFile)
 	{
 		mFile = NULL ;
 		close() ;
-		if (sizep)
-		{
-			*sizep = 0;
-		}
 		return s;
 	}
 
-	if (sizep)
-	{
-		S32 file_size = 0;
-		apr_off_t offset = 0;
-		if (apr_file_seek(mFile, APR_END, &offset) == APR_SUCCESS)
-		{
-			llassert_always(offset <= 0x7fffffff);
-			file_size = (S32)offset;
-			offset = 0;
-			apr_file_seek(mFile, APR_SET, &offset);
-		}
-		*sizep = file_size;
-	}
-
 	return s;
 }
 
@@ -369,6 +423,7 @@ S32 LLAPRFile::read(void *buf, S32 nbytes)
 	apr_status_t s = apr_file_read(mFile, buf, &sz);
 	if (s != APR_SUCCESS)
 	{
+		ll_apr_warn_status(s);
 		return 0;
 	}
 	else
@@ -386,6 +441,7 @@ S32 LLAPRFile::write(const void *buf, S32 nbytes)
 	apr_status_t s = apr_file_write(mFile, buf, &sz);
 	if (s != APR_SUCCESS)
 	{
+		ll_apr_warn_status(s);
 		return 0;
 	}
 	else
@@ -434,6 +490,8 @@ apr_file_t* LLAPRFile::open(const std::string& filename, LLVolatileAPRPool* pool
 	s = apr_file_open(&file_handle, filename.c_str(), flags, APR_OS_DEFAULT, pool->getVolatileAPRPool());
 	if (s != APR_SUCCESS || !file_handle)
 	{
+		ll_apr_warn_status(s);
+		LL_WARNS("APR") << " Attempting to open filename: " << filename << LL_ENDL;
 		file_handle = NULL ;
 		close(file_handle, pool) ;
 		return NULL;
@@ -464,6 +522,7 @@ S32 LLAPRFile::seek(apr_file_t* file_handle, apr_seek_where_t where, S32 offset)
 	}
 	if (s != APR_SUCCESS)
 	{
+		ll_apr_warn_status(s);
 		return -1;
 	}
 	else
@@ -501,6 +560,8 @@ S32 LLAPRFile::readEx(const std::string& filename, void *buf, S32 offset, S32 nb
 		apr_status_t s = apr_file_read(file_handle, buf, &bytes_read);
 		if (s != APR_SUCCESS)
 		{
+			LL_WARNS("APR") << " Attempting to read filename: " << filename << LL_ENDL;
+			ll_apr_warn_status(s);
 			bytes_read = 0;
 		}
 		else
@@ -549,6 +610,8 @@ S32 LLAPRFile::writeEx(const std::string& filename, void *buf, S32 offset, S32 n
 		apr_status_t s = apr_file_write(file_handle, buf, &bytes_written);
 		if (s != APR_SUCCESS)
 		{
+			LL_WARNS("APR") << " Attempting to write filename: " << filename << LL_ENDL;
+			ll_apr_warn_status(s);
 			bytes_written = 0;
 		}
 		else
@@ -575,8 +638,8 @@ bool LLAPRFile::remove(const std::string& filename, LLVolatileAPRPool* pool)
 
 	if (s != APR_SUCCESS)
 	{
-		LL_DEBUGS("APR") << "LLAPRFile::remove failed on file: " << filename << LL_ENDL;
 		ll_apr_warn_status(s);
+		LL_WARNS("APR") << " Attempting to remove filename: " << filename << LL_ENDL;
 		return false;
 	}
 	return true;
@@ -593,8 +656,8 @@ bool LLAPRFile::rename(const std::string& filename, const std::string& newname,
 	
 	if (s != APR_SUCCESS)
 	{
-		LL_DEBUGS("APR") << "LLAPRFile::rename failed on file: " << filename << LL_ENDL;
 		ll_apr_warn_status(s);
+		LL_WARNS("APR") << " Attempting to rename filename: " << filename << LL_ENDL;
 		return false;
 	}
 	return true;
@@ -667,8 +730,8 @@ bool LLAPRFile::makeDir(const std::string& dirname, LLVolatileAPRPool* pool)
 		
 	if (s != APR_SUCCESS)
 	{
-		LL_DEBUGS("APR") << "LLAPRFile::makeDir failed on file: " << dirname << LL_ENDL;
 		ll_apr_warn_status(s);
+		LL_WARNS("APR") << " Attempting to make directory: " << dirname << LL_ENDL;
 		return false;
 	}
 	return true;
@@ -685,8 +748,8 @@ bool LLAPRFile::removeDir(const std::string& dirname, LLVolatileAPRPool* pool)
 	
 	if (s != APR_SUCCESS)
 	{
-		LL_DEBUGS("APR") << "LLAPRFile::removeDir failed on file: " << dirname << LL_ENDL;
 		ll_apr_warn_status(s);
+		LL_WARNS("APR") << " Attempting to remove directory: " << dirname << LL_ENDL;
 		return false;
 	}
 	return true;
diff --git a/indra/llcommon/llapr.h b/indra/llcommon/llapr.h
index a1fcd2cf8d..b08bb617c5 100644
--- a/indra/llcommon/llapr.h
+++ b/indra/llcommon/llapr.h
@@ -70,9 +70,9 @@ class LL_COMMON_API LLAPRPool
 {
 public:
 	LLAPRPool(apr_pool_t *parent = NULL, apr_size_t size = 0, BOOL releasePoolFlag = TRUE) ;
-	~LLAPRPool() ;
+	virtual ~LLAPRPool() ;
 
-	apr_pool_t* getAPRPool() ;
+	virtual apr_pool_t* getAPRPool() ;
 	apr_status_t getStatus() {return mStatus ; }
 
 protected:
@@ -95,18 +95,21 @@ protected:
 class LL_COMMON_API LLVolatileAPRPool : public LLAPRPool
 {
 public:
-	LLVolatileAPRPool(apr_pool_t *parent = NULL, apr_size_t size = 0, BOOL releasePoolFlag = TRUE);
-	~LLVolatileAPRPool(){}
+	LLVolatileAPRPool(BOOL is_local = TRUE, apr_pool_t *parent = NULL, apr_size_t size = 0, BOOL releasePoolFlag = TRUE);
+	virtual ~LLVolatileAPRPool();
 
-	apr_pool_t* getVolatileAPRPool() ;
-	
+	/*virtual*/ apr_pool_t* getAPRPool() ; //define this virtual function to avoid any mistakenly calling LLAPRPool::getAPRPool().
+	apr_pool_t* getVolatileAPRPool() ;	
 	void        clearVolatileAPRPool() ;
 
 	BOOL        isFull() ;
-	BOOL        isEmpty() {return !mNumActiveRef ;}
+	
 private:
 	S32 mNumActiveRef ; //number of active pointers pointing to the apr_pool.
-	S32 mNumTotalRef ;  //number of total pointers pointing to the apr_pool since last creating.   
+	S32 mNumTotalRef ;  //number of total pointers pointing to the apr_pool since last creating.  
+
+	apr_thread_mutex_t *mMutexp;
+	apr_pool_t         *mMutexPool;
 } ;
 
 /** 
@@ -192,18 +195,21 @@ typedef LLAtomic32<S32> LLAtomicS32;
 //      1, a temperary pool passed to an APRFile function, which is used within this function and only once.
 //      2, a global pool.
 //
-class LL_COMMON_API LLAPRFile
+
+class LL_COMMON_API LLAPRFile : boost::noncopyable
 {
+	// make this non copyable since a copy closes the file
 private:
 	apr_file_t* mFile ;
 	LLVolatileAPRPool *mCurrentFilePoolp ; //currently in use apr_pool, could be one of them: sAPRFilePoolp, or a temp pool. 
 
 public:
 	LLAPRFile() ;
+	LLAPRFile(const std::string& filename, apr_int32_t flags, LLVolatileAPRPool* pool = NULL);
 	~LLAPRFile() ;
-
-	apr_status_t open(LLVolatileAPRPool* pool, const std::string& filename, apr_int32_t flags, S32* sizep = NULL);
-	apr_status_t open(const std::string& filename, apr_int32_t flags, apr_pool_t* pool = NULL, S32* sizep = NULL);
+	
+	apr_status_t open(const std::string& filename, apr_int32_t flags, LLVolatileAPRPool* pool = NULL, S32* sizep = NULL);
+	apr_status_t open(const std::string& filename, apr_int32_t flags, BOOL use_global_pool); //use gAPRPoolp.
 	apr_status_t close() ;
 
 	// Returns actual offset, -1 if seek fails
@@ -217,8 +223,8 @@ public:
 	apr_file_t* getFileHandle() {return mFile;}	
 
 private:
-	apr_pool_t* getAPRFilePool(apr_pool_t* pool) ;
-
+	apr_pool_t* getAPRFilePool(apr_pool_t* pool) ;	
+	
 //
 //*******************************************************************************************************************************
 //static components
diff --git a/indra/llcommon/llassettype.cpp b/indra/llcommon/llassettype.cpp
index b2a92861cc..6d5b12d840 100644
--- a/indra/llcommon/llassettype.cpp
+++ b/indra/llcommon/llassettype.cpp
@@ -43,30 +43,21 @@
 struct AssetEntry : public LLDictionaryEntry
 {
 	AssetEntry(const char *desc_name,
-			   const char *type_name, // 8 character limit!
-			   const char *human_name, // for decoding to human readable form; put any and as many printable characters you want in each one
-			   const char *category_name, // used by llinventorymodel when creating new categories
-			   EDragAndDropType dad_type,
-			   bool can_link, // can you create a link to this type?
-			   bool is_protected) // can the viewer change categories of this type?
+			   const char *type_name, 	// 8 character limit!
+			   const char *human_name, 	// for decoding to human readable form; put any and as many printable characters you want in each one
+			   bool can_link) 			// can you create a link to this type?
 		:
 		LLDictionaryEntry(desc_name),
 		mTypeName(type_name),
 		mHumanName(human_name),
-		mCategoryName(category_name),
-		mDadType(dad_type),
-		mCanLink(can_link),
-		mIsProtected(is_protected)
+		mCanLink(can_link)
 	{
 		llassert(strlen(mTypeName) <= 8);
 	}
 
 	const char *mTypeName;
 	const char *mHumanName;
-	const char *mCategoryName;
-	EDragAndDropType mDadType;
 	bool mCanLink;
-	bool mIsProtected;
 };
 
 class LLAssetDictionary : public LLSingleton<LLAssetDictionary>,
@@ -78,48 +69,32 @@ public:
 
 LLAssetDictionary::LLAssetDictionary()
 {
-	//       												   DESCRIPTION			TYPE NAME	HUMAN NAME			CATEGORY NAME 		DRAG&DROP		CAN LINK?	PROTECTED?
-	//      												  |--------------------|-----------|-------------------|-------------------|---------------|-----------|-----------|
-	addEntry(LLAssetType::AT_TEXTURE, 			new AssetEntry("TEXTURE",			"texture",	"texture",			"Textures", 		DAD_TEXTURE,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_SOUND, 			new AssetEntry("SOUND",				"sound",	"sound",			"Sounds", 			DAD_SOUND,		TRUE,		TRUE));
-	addEntry(LLAssetType::AT_CALLINGCARD, 		new AssetEntry("CALLINGCARD",		"callcard",	"calling card",		"Calling Cards", 	DAD_CALLINGCARD, TRUE,		TRUE));
-	addEntry(LLAssetType::AT_LANDMARK, 			new AssetEntry("LANDMARK",			"landmark",	"landmark",			"Landmarks", 		DAD_LANDMARK,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_SCRIPT, 			new AssetEntry("SCRIPT",			"script",	"legacy script",	"Scripts", 			DAD_NONE,		TRUE,		TRUE));
-	addEntry(LLAssetType::AT_CLOTHING, 			new AssetEntry("CLOTHING",			"clothing",	"clothing",			"Clothing", 		DAD_CLOTHING,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_OBJECT, 			new AssetEntry("OBJECT",			"object",	"object",			"Objects", 			DAD_OBJECT,		TRUE,		TRUE));
-	addEntry(LLAssetType::AT_NOTECARD, 			new AssetEntry("NOTECARD",			"notecard",	"note card",		"Notecards", 		DAD_NOTECARD,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_CATEGORY, 			new AssetEntry("CATEGORY",			"category",	"folder",			"New Folder", 		DAD_CATEGORY,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_ROOT_CATEGORY, 	new AssetEntry("ROOT_CATEGORY",		"root",		"root",				"Inventory", 		DAD_ROOT_CATEGORY, TRUE,	TRUE));
-	addEntry(LLAssetType::AT_LSL_TEXT, 			new AssetEntry("LSL_TEXT",			"lsltext",	"lsl2 script",		"Scripts", 			DAD_SCRIPT,		TRUE,		TRUE));
-	addEntry(LLAssetType::AT_LSL_BYTECODE, 		new AssetEntry("LSL_BYTECODE",		"lslbyte",	"lsl bytecode",		"Scripts", 			DAD_NONE,		TRUE,		TRUE));
-	addEntry(LLAssetType::AT_TEXTURE_TGA, 		new AssetEntry("TEXTURE_TGA",		"txtr_tga",	"tga texture",		"Uncompressed Images", DAD_NONE,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_BODYPART, 			new AssetEntry("BODYPART",			"bodypart",	"body part",		"Body Parts", 		DAD_BODYPART,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_TRASH, 			new AssetEntry("TRASH",				"trash",	"trash",			"Trash", 			DAD_NONE,		FALSE,		TRUE));
-	addEntry(LLAssetType::AT_SNAPSHOT_CATEGORY, new AssetEntry("SNAPSHOT_CATEGORY", "snapshot",	"snapshot",			"Photo Album", 		DAD_NONE,		FALSE,		TRUE));
-	addEntry(LLAssetType::AT_LOST_AND_FOUND, 	new AssetEntry("LOST_AND_FOUND", 	"lstndfnd",	"lost and found",	"Lost And Found", 	DAD_NONE,		FALSE,		TRUE));
-	addEntry(LLAssetType::AT_SOUND_WAV, 		new AssetEntry("SOUND_WAV",			"snd_wav",	"sound",			"Uncompressed SoundS", DAD_NONE,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_IMAGE_TGA, 		new AssetEntry("IMAGE_TGA",			"img_tga",	"targa image",		"Uncompressed Images", DAD_NONE,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_IMAGE_JPEG, 		new AssetEntry("IMAGE_JPEG",		"jpeg",		"jpeg image",		"Uncompressed Images", DAD_NONE,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_ANIMATION, 		new AssetEntry("ANIMATION",			"animatn",	"animation",		"Animations", 		DAD_ANIMATION,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_GESTURE, 			new AssetEntry("GESTURE",			"gesture",	"gesture",			"Gestures", 		DAD_GESTURE,	TRUE,		TRUE));
-	addEntry(LLAssetType::AT_SIMSTATE, 			new AssetEntry("SIMSTATE",			"simstate",	"simstate",			"New Folder", 		DAD_NONE,		FALSE,		TRUE));
-	addEntry(LLAssetType::AT_FAVORITE, 			new AssetEntry("FAVORITE",			"favorite",	"favorite",			"favorite", 		DAD_NONE,		FALSE,		TRUE));
-
-	addEntry(LLAssetType::AT_LINK, 				new AssetEntry("LINK",				"link",		"symbolic link",	"Link", 			DAD_LINK,		FALSE,		TRUE));
-	addEntry(LLAssetType::AT_LINK_FOLDER, 		new AssetEntry("FOLDER_LINK",		"link_f", 	"symbolic folder link", "New Folder", 	DAD_LINK,		FALSE,		TRUE));
-
-	for (S32 ensemble_num = S32(LLAssetType::AT_FOLDER_ENSEMBLE_START); 
-		 ensemble_num <= S32(LLAssetType::AT_FOLDER_ENSEMBLE_END); 
-		 ensemble_num++)
-	{
-		addEntry(LLAssetType::EType(ensemble_num), new AssetEntry("ENSEMBLE",		"ensemble", "ensemble", 		"New Folder", 		DAD_CATEGORY,	FALSE,		FALSE)); 
-	}
-
-	addEntry(LLAssetType::AT_CURRENT_OUTFIT, 	new AssetEntry("CURRENT",			"current",	"current outfit",	"Current Look", 	DAD_CATEGORY,	FALSE,		TRUE));
-	addEntry(LLAssetType::AT_OUTFIT, 			new AssetEntry("OUTFIT",			"outfit",	"outfit",			"New Look", 		DAD_CATEGORY,	FALSE,		FALSE));
-	addEntry(LLAssetType::AT_MY_OUTFITS, 		new AssetEntry("MY_OUTFITS",		"my_otfts",	"my outfits",		"My Looks", 		DAD_CATEGORY,	FALSE,		TRUE));
-		 
-	addEntry(LLAssetType::AT_NONE, 				new AssetEntry("NONE",				"-1",		NULL,		  		"New Folder", 		DAD_NONE,		FALSE,		FALSE));
+	//       												   DESCRIPTION			TYPE NAME	HUMAN NAME			CAN LINK?	
+	//      												  |--------------------|-----------|-------------------|-----------|
+	addEntry(LLAssetType::AT_TEXTURE, 			new AssetEntry("TEXTURE",			"texture",	"texture",			FALSE));
+	addEntry(LLAssetType::AT_SOUND, 			new AssetEntry("SOUND",				"sound",	"sound",			FALSE));
+	addEntry(LLAssetType::AT_CALLINGCARD, 		new AssetEntry("CALLINGCARD",		"callcard",	"calling card",		FALSE));
+	addEntry(LLAssetType::AT_LANDMARK, 			new AssetEntry("LANDMARK",			"landmark",	"landmark",			FALSE));
+	addEntry(LLAssetType::AT_SCRIPT, 			new AssetEntry("SCRIPT",			"script",	"legacy script",	FALSE));
+	addEntry(LLAssetType::AT_CLOTHING, 			new AssetEntry("CLOTHING",			"clothing",	"clothing",			TRUE));
+	addEntry(LLAssetType::AT_OBJECT, 			new AssetEntry("OBJECT",			"object",	"object",			TRUE));
+	addEntry(LLAssetType::AT_NOTECARD, 			new AssetEntry("NOTECARD",			"notecard",	"note card",		FALSE));
+	addEntry(LLAssetType::AT_CATEGORY, 			new AssetEntry("CATEGORY",			"category",	"folder",			TRUE));
+	addEntry(LLAssetType::AT_LSL_TEXT, 			new AssetEntry("LSL_TEXT",			"lsltext",	"lsl2 script",		FALSE));
+	addEntry(LLAssetType::AT_LSL_BYTECODE, 		new AssetEntry("LSL_BYTECODE",		"lslbyte",	"lsl bytecode",		FALSE));
+	addEntry(LLAssetType::AT_TEXTURE_TGA, 		new AssetEntry("TEXTURE_TGA",		"txtr_tga",	"tga texture",		FALSE));
+	addEntry(LLAssetType::AT_BODYPART, 			new AssetEntry("BODYPART",			"bodypart",	"body part",		TRUE));
+	addEntry(LLAssetType::AT_SOUND_WAV, 		new AssetEntry("SOUND_WAV",			"snd_wav",	"sound",			FALSE));
+	addEntry(LLAssetType::AT_IMAGE_TGA, 		new AssetEntry("IMAGE_TGA",			"img_tga",	"targa image",		FALSE));
+	addEntry(LLAssetType::AT_IMAGE_JPEG, 		new AssetEntry("IMAGE_JPEG",		"jpeg",		"jpeg image",		FALSE));
+	addEntry(LLAssetType::AT_ANIMATION, 		new AssetEntry("ANIMATION",			"animatn",	"animation",		FALSE));
+	addEntry(LLAssetType::AT_GESTURE, 			new AssetEntry("GESTURE",			"gesture",	"gesture",			TRUE));
+	addEntry(LLAssetType::AT_SIMSTATE, 			new AssetEntry("SIMSTATE",			"simstate",	"simstate",			FALSE));
+
+	addEntry(LLAssetType::AT_LINK, 				new AssetEntry("LINK",				"link",		"symbolic link",	FALSE));
+	addEntry(LLAssetType::AT_LINK_FOLDER, 		new AssetEntry("FOLDER_LINK",		"link_f", 	"symbolic folder link", FALSE));
+
+	addEntry(LLAssetType::AT_NONE, 				new AssetEntry("NONE",				"-1",		NULL,		  		FALSE));
 };
 
 // static
@@ -140,8 +115,7 @@ const std::string &LLAssetType::getDesc(LLAssetType::EType asset_type)
 	}
 	else
 	{
-		static const std::string error_string = "BAD TYPE";
-		return error_string;
+		return badLookup();
 	}
 }
 
@@ -156,7 +130,7 @@ const char *LLAssetType::lookup(LLAssetType::EType asset_type)
 	}
 	else
 	{
-		return "-1";
+		return badLookup().c_str();
 	}
 }
 
@@ -166,6 +140,7 @@ LLAssetType::EType LLAssetType::lookup(const char* name)
 	return lookup(ll_safe_string(name));
 }
 
+// static
 LLAssetType::EType LLAssetType::lookup(const std::string& type_name)
 {
 	const LLAssetDictionary *dict = LLAssetDictionary::getInstance();
@@ -193,7 +168,7 @@ const char *LLAssetType::lookupHumanReadable(LLAssetType::EType asset_type)
 	}
 	else
 	{
-		return NULL;
+		return badLookup().c_str();
 	}
 }
 
@@ -203,6 +178,7 @@ LLAssetType::EType LLAssetType::lookupHumanReadable(const char* name)
 	return lookupHumanReadable(ll_safe_string(name));
 }
 
+// static
 LLAssetType::EType LLAssetType::lookupHumanReadable(const std::string& readable_name)
 {
 	const LLAssetDictionary *dict = LLAssetDictionary::getInstance();
@@ -220,32 +196,6 @@ LLAssetType::EType LLAssetType::lookupHumanReadable(const std::string& readable_
 }
 
 // static
-const char *LLAssetType::lookupCategoryName(LLAssetType::EType asset_type)
-{
-	const LLAssetDictionary *dict = LLAssetDictionary::getInstance();
-	const AssetEntry *entry = dict->lookup(asset_type);
-	if (entry)
-	{
-		return entry->mCategoryName;
-	}
-	else
-	{
-		return "New Folder";
-	}
-}
-
-// static
-EDragAndDropType LLAssetType::lookupDragAndDropType(EType asset_type)
-{
-	const LLAssetDictionary *dict = LLAssetDictionary::getInstance();
-	const AssetEntry *entry = dict->lookup(asset_type);
-	if (entry)
-		return entry->mDadType;
-	else
-		return DAD_NONE;
-}
-
-// static
 bool LLAssetType::lookupCanLink(EType asset_type)
 {
 	const LLAssetDictionary *dict = LLAssetDictionary::getInstance();
@@ -269,37 +219,9 @@ bool LLAssetType::lookupIsLinkType(EType asset_type)
 }
 
 // static
-// Only ensembles and plain folders aren't protected.  "Protected" means
-// you can't change certain properties such as their type.
-bool LLAssetType::lookupIsProtectedCategoryType(EType asset_type)
+const std::string &LLAssetType::badLookup()
 {
-	const LLAssetDictionary *dict = LLAssetDictionary::getInstance();
-	const AssetEntry *entry = dict->lookup(asset_type);
-	if (entry)
-	{
-		return entry->mIsProtected;
-	}
-	return true;
-}
+	static const std::string sBadLookup = "llassettype_bad_lookup";
+	return sBadLookup;
 
-// static
-bool LLAssetType::lookupIsEnsembleCategoryType(EType asset_type)
-{
-	return (asset_type >= AT_FOLDER_ENSEMBLE_START &&
-			asset_type <= AT_FOLDER_ENSEMBLE_END);
-}
-
-
-// static. Generate a good default description
-void LLAssetType::generateDescriptionFor(LLAssetType::EType asset_type,
-										 std::string& description)
-{
-	const S32 BUF_SIZE = 30;
-	char time_str[BUF_SIZE];	/* Flawfinder: ignore */
-	time_t now;
-	time(&now);
-	memset(time_str, '\0', BUF_SIZE);
-	strftime(time_str, BUF_SIZE - 1, "%Y-%m-%d %H:%M:%S ", localtime(&now));
-	description.assign(time_str);
-	description.append(LLAssetType::lookupHumanReadable(asset_type));
 }
diff --git a/indra/llcommon/llassettype.h b/indra/llcommon/llassettype.h
index 3c760e4d91..ec2290d30e 100644
--- a/indra/llcommon/llassettype.h
+++ b/indra/llcommon/llassettype.h
@@ -94,18 +94,6 @@ public:
 		AT_BODYPART = 13,
 			// A collection of textures and parameters that can be worn by an avatar.
 
-		AT_TRASH = 14,
-			// Only to be used as a marker for a category preferred type. 
-			// Using this, we can throw things in the trash before completely deleting.
-
-		AT_SNAPSHOT_CATEGORY = 15,
-			// A marker for a folder meant for snapshots. 
-			// No actual assets will be snapshots, though if there were, you
-			// could interpret them as textures.
-
-		AT_LOST_AND_FOUND = 16,
-			// Used to stuff lost&found items into.
-
 		AT_SOUND_WAV = 17,
 			// Uncompressed sound.
 
@@ -126,38 +114,22 @@ public:
 		AT_SIMSTATE = 22,
 			// Simstate file.
 
-		AT_FAVORITE = 23,
-			// favorite items
-
 		AT_LINK = 24,
 			// Inventory symbolic link
 
 		AT_LINK_FOLDER = 25,
 			// Inventory folder link
-
-		AT_FOLDER_ENSEMBLE_START = 26,
-		AT_FOLDER_ENSEMBLE_END = 45,
-			// This range is reserved for special clothing folder types.
-
-		AT_CURRENT_OUTFIT = 46,
-			// Current outfit
-
-		AT_OUTFIT = 47,
-			// Predefined outfit ("look")
-
-		AT_MY_OUTFITS = 48,
-			// Folder that holds your outfits.
-
 		
-		AT_COUNT = 49,
+		AT_COUNT = 26,
 
 			// +*********************************************************+
 			// |  TO ADD AN ELEMENT TO THIS ENUM:                        |
 			// +*********************************************************+
 			// | 1. INSERT BEFORE AT_COUNT                               |
 			// | 2. INCREMENT AT_COUNT BY 1                              |
-			// | 3. ADD TO LLAssetDictionary in LLAssetType.cpp          |
-			// | 3. ADD TO DEFAULT_ASSET_FOR_INV in LLInventoryType.cpp  |
+			// | 3. ADD TO LLAssetType.cpp                               |
+			// | 4. ADD TO LLViewerAssetType.cpp                         |
+			// | 5. ADD TO DEFAULT_ASSET_FOR_INV in LLInventoryType.cpp  |
 			// +*********************************************************+
 
 		AT_NONE = -1
@@ -173,33 +145,17 @@ public:
 	static EType 				lookupHumanReadable(const std::string& readable_name);
 	static const char*			lookupHumanReadable(EType asset_type);
 
-	// Generate a good default description. You may want to add a verb
-	// or agent name after this depending on your application.
-	static void 				generateDescriptionFor(LLAssetType::EType asset_type,
-													   std::string& description);
-
 	static EType 				getType(const std::string& desc_name);
 	static const std::string&	getDesc(EType asset_type);
-	static EDragAndDropType   	lookupDragAndDropType(EType asset_type);
 
 	static bool 				lookupCanLink(EType asset_type);
 	static bool 				lookupIsLinkType(EType asset_type);
 
-	static const char*  		lookupCategoryName(EType asset_type);
-	static bool 				lookupIsProtectedCategoryType(EType asset_type);
-	static bool 				lookupIsEnsembleCategoryType(EType asset_type);
-
-	/* TODO: Change return types from "const char *" to "const std::string &".
-	This is fairly straightforward, but requires changing some calls to use .c_str().
-	e.g.:
-	-	fprintf(fp, "\t\ttype\t%s\n", LLAssetType::lookup(mType));
-	+	fprintf(fp, "\t\ttype\t%s\n", LLAssetType::lookup(mType).c_str());
-	*/
-	
-private:
-	// don't instantiate or derive one of these objects
-	LLAssetType( void ) {}
-	~LLAssetType( void ) {}
+	static const std::string&	badLookup(); // error string when a lookup fails
+
+protected:
+	LLAssetType() {}
+	~LLAssetType() {}
 };
 
 #endif // LL_LLASSETTYPE_H
diff --git a/indra/llcommon/llfoldertype.cpp b/indra/llcommon/llfoldertype.cpp
new file mode 100644
index 0000000000..9107b11597
--- /dev/null
+++ b/indra/llcommon/llfoldertype.cpp
@@ -0,0 +1,165 @@
+/** 
+ * @file llfoldertype.cpp
+ * @brief Implementatino of LLFolderType functionality.
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ * 
+ * Copyright (c) 2001-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llfoldertype.h"
+#include "lldictionary.h"
+#include "llmemory.h"
+#include "llsingleton.h"
+
+///----------------------------------------------------------------------------
+/// Class LLFolderType
+///----------------------------------------------------------------------------
+struct FolderEntry : public LLDictionaryEntry
+{
+	FolderEntry(const std::string &type_name, // 8 character limit!
+				bool is_protected) // can the viewer change categories of this type?
+		:
+	LLDictionaryEntry(type_name),
+	mIsProtected(is_protected)
+	{
+		llassert(type_name.length() <= 8);
+	}
+
+	const bool mIsProtected;
+};
+
+class LLFolderDictionary : public LLSingleton<LLFolderDictionary>,
+						   public LLDictionary<LLFolderType::EType, FolderEntry>
+{
+public:
+	LLFolderDictionary();
+};
+
+LLFolderDictionary::LLFolderDictionary()
+{
+	//       													    TYPE NAME	PROTECTED
+	//      													   |-----------|---------|
+	addEntry(LLFolderType::FT_TEXTURE, 				new FolderEntry("texture",	TRUE));
+	addEntry(LLFolderType::FT_SOUND, 				new FolderEntry("sound",	TRUE));
+	addEntry(LLFolderType::FT_CALLINGCARD, 			new FolderEntry("callcard",	TRUE));
+	addEntry(LLFolderType::FT_LANDMARK, 			new FolderEntry("landmark",	TRUE));
+	addEntry(LLFolderType::FT_CLOTHING, 			new FolderEntry("clothing",	TRUE));
+	addEntry(LLFolderType::FT_OBJECT, 				new FolderEntry("object",	TRUE));
+	addEntry(LLFolderType::FT_NOTECARD, 			new FolderEntry("notecard",	TRUE));
+	addEntry(LLFolderType::FT_CATEGORY, 			new FolderEntry("category",	TRUE));
+	addEntry(LLFolderType::FT_ROOT_CATEGORY, 		new FolderEntry("root",		TRUE));
+	addEntry(LLFolderType::FT_LSL_TEXT, 			new FolderEntry("lsltext",	TRUE));
+	addEntry(LLFolderType::FT_BODYPART, 			new FolderEntry("bodypart",	TRUE));
+	addEntry(LLFolderType::FT_TRASH, 				new FolderEntry("trash",	TRUE));
+	addEntry(LLFolderType::FT_SNAPSHOT_CATEGORY, 	new FolderEntry("snapshot", TRUE));
+	addEntry(LLFolderType::FT_LOST_AND_FOUND, 		new FolderEntry("lstndfnd",	TRUE));
+	addEntry(LLFolderType::FT_ANIMATION, 			new FolderEntry("animatn",	TRUE));
+	addEntry(LLFolderType::FT_GESTURE, 				new FolderEntry("gesture",	TRUE));
+	addEntry(LLFolderType::FT_FAVORITE, 			new FolderEntry("favorite",	TRUE));
+	
+	for (S32 ensemble_num = S32(LLFolderType::FT_ENSEMBLE_START); ensemble_num <= S32(LLFolderType::FT_ENSEMBLE_END); ensemble_num++)
+	{
+		addEntry(LLFolderType::EType(ensemble_num), new FolderEntry("ensemble", FALSE)); 
+	}
+
+	addEntry(LLFolderType::FT_CURRENT_OUTFIT, 		new FolderEntry("current",	TRUE));
+	addEntry(LLFolderType::FT_OUTFIT, 				new FolderEntry("outfit",	FALSE));
+	addEntry(LLFolderType::FT_MY_OUTFITS, 			new FolderEntry("my_otfts",	TRUE));
+	addEntry(LLFolderType::FT_INBOX, 				new FolderEntry("inbox",	TRUE));
+		 
+	addEntry(LLFolderType::FT_NONE, 				new FolderEntry("-1",		FALSE));
+};
+
+// static
+LLFolderType::EType LLFolderType::lookup(const std::string& name)
+{
+	return LLFolderDictionary::getInstance()->lookup(name);
+}
+
+// static
+const std::string &LLFolderType::lookup(LLFolderType::EType folder_type)
+{
+	const FolderEntry *entry = LLFolderDictionary::getInstance()->lookup(folder_type);
+	if (entry)
+	{
+		return entry->mName;
+	}
+	else
+	{
+		return badLookup();
+	}
+}
+
+// static
+// Only ensembles and plain folders aren't protected.  "Protected" means
+// you can't change certain properties such as their type.
+bool LLFolderType::lookupIsProtectedType(EType folder_type)
+{
+	const LLFolderDictionary *dict = LLFolderDictionary::getInstance();
+	const FolderEntry *entry = dict->lookup(folder_type);
+	if (entry)
+	{
+		return entry->mIsProtected;
+	}
+	return true;
+}
+
+// static
+bool LLFolderType::lookupIsEnsembleType(EType folder_type)
+{
+	return (folder_type >= FT_ENSEMBLE_START &&
+			folder_type <= FT_ENSEMBLE_END);
+}
+
+// static
+LLAssetType::EType LLFolderType::folderTypeToAssetType(LLFolderType::EType folder_type)
+{
+	if (LLAssetType::lookup(LLAssetType::EType(folder_type)) == LLAssetType::badLookup())
+	{
+		llwarns << "Converting to unknown asset type " << folder_type << llendl;
+	}
+	return (LLAssetType::EType)folder_type;
+}
+
+// static
+LLFolderType::EType LLFolderType::assetTypeToFolderType(LLAssetType::EType asset_type)
+{
+	if (LLFolderType::lookup(LLFolderType::EType(asset_type)) == LLFolderType::badLookup())
+	{
+		llwarns << "Converting to unknown folder type " << asset_type << llendl;
+	}
+	return (LLFolderType::EType)asset_type;
+}
+
+// static
+const std::string &LLFolderType::badLookup()
+{
+	static const std::string sBadLookup = "llfoldertype_bad_lookup";
+	return sBadLookup;
+}
diff --git a/indra/llcommon/llfoldertype.h b/indra/llcommon/llfoldertype.h
new file mode 100644
index 0000000000..5374ffd829
--- /dev/null
+++ b/indra/llcommon/llfoldertype.h
@@ -0,0 +1,123 @@
+/** 
+ * @file llfoldertype.h
+ * @brief Declaration of LLFolderType.
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ * 
+ * Copyright (c) 2001-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLFOLDERTYPE_H
+#define LL_LLFOLDERTYPE_H
+
+#include <string>
+#include "llassettype.h"
+
+// This class handles folder types (similar to assettype, except for folders)
+// and operations on those.
+class LL_COMMON_API LLFolderType
+{
+public:
+	// ! BACKWARDS COMPATIBILITY ! Folder type enums must match asset type enums.
+	enum EType
+	{
+		FT_TEXTURE = 0,
+
+		FT_SOUND = 1, 
+
+		FT_CALLINGCARD = 2,
+
+		FT_LANDMARK = 3,
+
+		// FT_SCRIPT = 4,
+
+		FT_CLOTHING = 5,
+
+		FT_OBJECT = 6,
+
+		FT_NOTECARD = 7,
+
+		FT_CATEGORY = 8,
+
+		FT_ROOT_CATEGORY = 9,
+
+		FT_LSL_TEXT = 10,
+
+		// FT_LSL_BYTECODE = 11,
+		// FT_TEXTURE_TGA = 12,
+
+		FT_BODYPART = 13,
+
+		FT_TRASH = 14,
+
+		FT_SNAPSHOT_CATEGORY = 15,
+
+		FT_LOST_AND_FOUND = 16,
+
+		// FT_SOUND_WAV = 17,
+		// FT_IMAGE_TGA = 18,
+		// FT_IMAGE_JPEG = 19,
+
+		FT_ANIMATION = 20,
+
+		FT_GESTURE = 21,
+
+		// FT_SIMSTATE = 22,
+
+		FT_FAVORITE = 23,
+
+		FT_ENSEMBLE_START = 26,
+		FT_ENSEMBLE_END = 45,
+			// This range is reserved for special clothing folder types.
+
+		FT_CURRENT_OUTFIT = 46,
+		FT_OUTFIT = 47,
+		FT_MY_OUTFITS = 48,
+		
+		FT_INBOX = 49,
+
+		FT_COUNT = 50,
+
+		FT_NONE = -1
+	};
+
+	static EType 				lookup(const std::string& type_name);
+	static const std::string&	lookup(EType folder_type);
+
+	static bool 				lookupIsProtectedType(EType folder_type);
+	static bool 				lookupIsEnsembleType(EType folder_type);
+
+	static LLAssetType::EType	folderTypeToAssetType(LLFolderType::EType folder_type);
+	static LLFolderType::EType	assetTypeToFolderType(LLAssetType::EType asset_type);
+
+	static const std::string&	badLookup(); // error string when a lookup fails
+
+protected:
+	LLFolderType() {}
+	~LLFolderType() {}
+};
+
+#endif // LL_LLFOLDERTYPE_H
diff --git a/indra/llcommon/llqueuedthread.cpp b/indra/llcommon/llqueuedthread.cpp
index 3db5c36545..395d298887 100644
--- a/indra/llcommon/llqueuedthread.cpp
+++ b/indra/llcommon/llqueuedthread.cpp
@@ -42,7 +42,8 @@ LLQueuedThread::LLQueuedThread(const std::string& name, bool threaded) :
 	LLThread(name),
 	mThreaded(threaded),
 	mIdleThread(TRUE),
-	mNextHandle(0)
+	mNextHandle(0),
+	mStarted(FALSE)
 {
 	if (mThreaded)
 	{
@@ -53,6 +54,10 @@ LLQueuedThread::LLQueuedThread(const std::string& name, bool threaded) :
 // MAIN THREAD
 LLQueuedThread::~LLQueuedThread()
 {
+	if (!mThreaded)
+	{
+		endThread();
+	}
 	shutdown();
 	// ~LLThread() will be called here
 }
@@ -106,6 +111,11 @@ void LLQueuedThread::shutdown()
 // virtual
 S32 LLQueuedThread::update(U32 max_time_ms)
 {
+	if (!mStarted)
+	{
+		startThread();
+		mStarted = TRUE;
+	}
 	return updateQueue(max_time_ms);
 }
 
@@ -452,26 +462,12 @@ S32 LLQueuedThread::processNextRequest()
 		}
 	}
 
-	S32 res;
 	S32 pending = getPending();
-	if (pending == 0)
-	{
-		if (isQuitting())
-		{
-			res = -1; // exit thread
-		}
-		else
-		{
-			res = 0;
-		}
-	}
-	else
-	{
-		res = pending;
-	}
-	return res;
+
+	return pending;
 }
 
+// virtual
 bool LLQueuedThread::runCondition()
 {
 	// mRunCondition must be locked here
@@ -481,35 +477,53 @@ bool LLQueuedThread::runCondition()
 		return true;
 }
 
+// virtual
 void LLQueuedThread::run()
 {
+	// call checPause() immediately so we don't try to do anything before the class is fully constructed
+	checkPause();
+	startThread();
+	mStarted = TRUE;
+	
 	while (1)
 	{
 		// this will block on the condition until runCondition() returns true, the thread is unpaused, or the thread leaves the RUNNING state.
 		checkPause();
 		
-		if(isQuitting())
+		if (isQuitting())
+		{
+			endThread();
 			break;
-
-		//llinfos << "QUEUED THREAD RUNNING, queue size = " << mRequestQueue.size() << llendl;
+		}
 
 		mIdleThread = FALSE;
+
+		threadedUpdate();
 		
 		int res = processNextRequest();
 		if (res == 0)
 		{
 			mIdleThread = TRUE;
+			ms_sleep(1);
 		}
-		
-		if (res < 0) // finished working and want to exit
-		{
-			break;
-		}
-
 		//LLThread::yield(); // thread should yield after each request		
 	}
+	llinfos << "LLQueuedThread " << mName << " EXITING." << llendl;
+}
 
-	llinfos << "QUEUED THREAD " << mName << " EXITING." << llendl;
+// virtual
+void LLQueuedThread::startThread()
+{
+}
+
+// virtual
+void LLQueuedThread::endThread()
+{
+}
+
+// virtual
+void LLQueuedThread::threadedUpdate()
+{
 }
 
 //============================================================================
diff --git a/indra/llcommon/llqueuedthread.h b/indra/llcommon/llqueuedthread.h
index 8bfa5632a1..9a9dbb18cc 100644
--- a/indra/llcommon/llqueuedthread.h
+++ b/indra/llcommon/llqueuedthread.h
@@ -166,6 +166,9 @@ private:
 
 	virtual bool runCondition(void);
 	virtual void run(void);
+	virtual void startThread(void);
+	virtual void endThread(void);
+	virtual void threadedUpdate(void);
 
 protected:
 	handle_t generateHandle();
@@ -200,6 +203,7 @@ public:
 	
 protected:
 	BOOL mThreaded;  // if false, run on main thread and do updates during update()
+	BOOL mStarted;  // required when mThreaded is false to call startThread() from update()
 	LLAtomic32<BOOL> mIdleThread; // request queue is empty (or we are quitting) and the thread is idle
 	
 	typedef std::set<QueuedRequest*, queued_request_less> request_queue_t;
diff --git a/indra/llcommon/llthread.h b/indra/llcommon/llthread.h
index c3d7650bd9..932d96d940 100644
--- a/indra/llcommon/llthread.h
+++ b/indra/llcommon/llthread.h
@@ -33,9 +33,7 @@
 #ifndef LL_LLTHREAD_H
 #define LL_LLTHREAD_H
 
-#include "llapr.h"
 #include "llapp.h"
-
 #include "apr_thread_cond.h"
 
 class LLThread;
diff --git a/indra/llcommon/llworkerthread.cpp b/indra/llcommon/llworkerthread.cpp
index 5dda600755..82c736266d 100644
--- a/indra/llcommon/llworkerthread.cpp
+++ b/indra/llcommon/llworkerthread.cpp
@@ -201,6 +201,7 @@ LLWorkerClass::~LLWorkerClass()
 {
 	llassert_always(!(mWorkFlags & WCF_WORKING));
 	llassert_always(mWorkFlags & WCF_DELETE_REQUESTED);
+	llassert_always(!mMutex.isLocked());
 	if (mRequestHandle != LLWorkerThread::nullHandle())
 	{
 		LLWorkerThread::WorkRequest* workreq = (LLWorkerThread::WorkRequest*)mWorkerThread->getRequest(mRequestHandle);
diff --git a/indra/llcommon/llworkerthread.h b/indra/llcommon/llworkerthread.h
index a12bd52a64..a1e85d2ecc 100644
--- a/indra/llcommon/llworkerthread.h
+++ b/indra/llcommon/llworkerthread.h
@@ -52,6 +52,7 @@ class LLWorkerClass;
 
 class LL_COMMON_API LLWorkerThread : public LLQueuedThread
 {
+	friend class LLWorkerClass;
 public:
 	class WorkRequest : public LLQueuedThread::QueuedRequest
 	{
@@ -92,8 +93,11 @@ public:
 	
 	handle_t addWorkRequest(LLWorkerClass* workerclass, S32 param, U32 priority = PRIORITY_NORMAL);
 	
-	void deleteWorker(LLWorkerClass* workerclass); // schedule for deletion
 	S32 getNumDeletes() { return (S32)mDeleteList.size(); } // debug
+
+private:
+	void deleteWorker(LLWorkerClass* workerclass); // schedule for deletion
+	
 };
 
 //============================================================================