13 files changed, 824 insertions, 11 deletions

diff --git a/indra/llcommon/CMakeLists.txt b/indra/llcommon/CMakeLists.txt
index 7bad780dd8..9342a22d46 100644
--- a/indra/llcommon/CMakeLists.txt
+++ b/indra/llcommon/CMakeLists.txt
@@ -70,6 +70,7 @@ set(llcommon_SOURCE_FILES
     llmemorystream.cpp
     llmemtype.cpp
     llmetrics.cpp
+    llmetricperformancetester.cpp
     llmortician.cpp
     lloptioninterface.cpp
     llptrto.cpp 
@@ -92,6 +93,7 @@ set(llcommon_SOURCE_FILES
     llstringtable.cpp
     llsys.cpp
     llthread.cpp
+    llthreadsafequeue.cpp
     lltimer.cpp
     lluri.cpp
     lluuid.cpp
@@ -186,6 +188,7 @@ set(llcommon_HEADER_FILES
     llmemorystream.h
     llmemtype.h
     llmetrics.h
+    llmetricperformancetester.h
     llmortician.h
     llnametable.h
     lloptioninterface.h
@@ -223,6 +226,7 @@ set(llcommon_HEADER_FILES
     llstringtable.h
     llsys.h
     llthread.h
+    llthreadsafequeue.h
     lltimer.h
     lltreeiterators.h
     lluri.h
diff --git a/indra/llcommon/indra_constants.h b/indra/llcommon/indra_constants.h
index b0618bfe59..95cb606240 100644
--- a/indra/llcommon/indra_constants.h
+++ b/indra/llcommon/indra_constants.h
@@ -245,9 +245,6 @@ const U8 SIM_ACCESS_ADULT	= 42;		// Seriously Adult Only
 const U8 SIM_ACCESS_DOWN	= 254;
 const U8 SIM_ACCESS_MAX 	= SIM_ACCESS_ADULT;
 
-// group constants
-const S32 MAX_AGENT_GROUPS = 25;
-
 // attachment constants
 const S32 MAX_AGENT_ATTACHMENTS = 38;
 const U8  ATTACHMENT_ADD = 0x80;
@@ -300,6 +297,14 @@ const U32 START_LOCATION_ID_COUNT 		= 6;
 // group constants
 const U32 GROUP_MIN_SIZE = 2;
 
+// gMaxAgentGroups is now sent by login.cgi, which
+// looks it up from globals.xml.
+//
+// For now we need an old default value however,
+// so the viewer can be deployed ahead of login.cgi.
+//
+const S32 DEFAULT_MAX_AGENT_GROUPS = 25;
+
 // radius within which a chat message is fully audible
 const F32 CHAT_WHISPER_RADIUS = 10.f;
 const F32 CHAT_NORMAL_RADIUS = 20.f;
diff --git a/indra/llcommon/llfasttimer_class.cpp b/indra/llcommon/llfasttimer_class.cpp
index c45921cdec..bce87ada96 100644
--- a/indra/llcommon/llfasttimer_class.cpp
+++ b/indra/llcommon/llfasttimer_class.cpp
@@ -56,6 +56,7 @@ bool LLFastTimer::sPauseHistory = 0;
 bool LLFastTimer::sResetHistory = 0;
 LLFastTimer::CurTimerData LLFastTimer::sCurTimerData;
 BOOL LLFastTimer::sLog = FALSE;
+std::string LLFastTimer::sLogName = "";
 BOOL LLFastTimer::sMetricLog = FALSE;
 LLMutex* LLFastTimer::sLogLock = NULL;
 std::queue<LLSD> LLFastTimer::sLogQueue;
diff --git a/indra/llcommon/llfasttimer_class.h b/indra/llcommon/llfasttimer_class.h
index 8dd686dc38..2a645315c9 100644
--- a/indra/llcommon/llfasttimer_class.h
+++ b/indra/llcommon/llfasttimer_class.h
@@ -219,6 +219,7 @@ public:
 	static std::queue<LLSD> sLogQueue;
 	static BOOL				sLog;
 	static BOOL				sMetricLog;
+	static std::string		sLogName;
 	static bool 			sPauseHistory;
 	static bool 			sResetHistory;
 	static U64				sTimerCycles;
diff --git a/indra/llcommon/llfile.cpp b/indra/llcommon/llfile.cpp
index 289ce0bc2c..8f02391e75 100644
--- a/indra/llcommon/llfile.cpp
+++ b/indra/llcommon/llfile.cpp
@@ -318,7 +318,12 @@ void llofstream::close()
 	if(is_open())
 	{
 		if (_Filebuffer->close() == 0)
+		{
 			_Myios::setstate(ios_base::failbit);	/*Flawfinder: ignore*/
+		}
+		delete _Filebuffer;
+		_Filebuffer = NULL;
+		_ShouldClose = false;
 	}
 }
 
diff --git a/indra/llcommon/llmetricperformancetester.cpp b/indra/llcommon/llmetricperformancetester.cpp
new file mode 100644
index 0000000000..5fa3a5ea07
--- /dev/null
+++ b/indra/llcommon/llmetricperformancetester.cpp
@@ -0,0 +1,254 @@
+/** 
+ * @file llmetricperformancetester.cpp
+ * @brief LLMetricPerformanceTesterBasic and LLMetricPerformanceTesterWithSession classes implementation
+ *
+ * $LicenseInfo:firstyear=2004&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "indra_constants.h"
+#include "llerror.h"
+#include "llsdserialize.h"
+#include "llstat.h"
+#include "lltreeiterators.h"
+#include "llmetricperformancetester.h"
+
+//----------------------------------------------------------------------------------------------
+// LLMetricPerformanceTesterBasic : static methods and testers management
+//----------------------------------------------------------------------------------------------
+
+LLMetricPerformanceTesterBasic::name_tester_map_t LLMetricPerformanceTesterBasic::sTesterMap ;
+
+/*static*/ 
+void LLMetricPerformanceTesterBasic::cleanClass() 
+{
+	for (name_tester_map_t::iterator iter = sTesterMap.begin() ; iter != sTesterMap.end() ; ++iter)
+	{
+		delete iter->second ;
+	}
+	sTesterMap.clear() ;
+}
+
+/*static*/ 
+BOOL LLMetricPerformanceTesterBasic::addTester(LLMetricPerformanceTesterBasic* tester) 
+{
+	llassert_always(tester != NULL);	
+	std::string name = tester->getTesterName() ;
+	if (getTester(name))
+	{
+		llerrs << "Tester name is already used by some other tester : " << name << llendl ;
+		return FALSE;
+	}
+
+	sTesterMap.insert(std::make_pair(name, tester));
+	return TRUE;
+}
+	
+/*static*/ 
+LLMetricPerformanceTesterBasic* LLMetricPerformanceTesterBasic::getTester(std::string name) 
+{
+	// Check for the requested metric name
+	name_tester_map_t::iterator found_it = sTesterMap.find(name) ;
+	if (found_it != sTesterMap.end())
+	{
+		return found_it->second ;
+	}
+	return NULL ;
+}
+
+/*static*/ 
+// Return TRUE if this metric is requested or if the general default "catch all" metric is requested
+BOOL LLMetricPerformanceTesterBasic::isMetricLogRequested(std::string name)
+{
+	return (LLFastTimer::sMetricLog && ((LLFastTimer::sLogName == name) || (LLFastTimer::sLogName == DEFAULT_METRIC_NAME)));
+}
+
+	
+//----------------------------------------------------------------------------------------------
+// LLMetricPerformanceTesterBasic : Tester instance methods
+//----------------------------------------------------------------------------------------------
+
+LLMetricPerformanceTesterBasic::LLMetricPerformanceTesterBasic(std::string name) : 
+	mName(name),
+	mCount(0)
+{
+	if (mName == std::string())
+	{
+		llerrs << "LLMetricPerformanceTesterBasic construction invalid : Empty name passed to constructor" << llendl ;
+	}
+
+	mValidInstance = LLMetricPerformanceTesterBasic::addTester(this) ;
+}
+
+LLMetricPerformanceTesterBasic::~LLMetricPerformanceTesterBasic() 
+{
+}
+
+void LLMetricPerformanceTesterBasic::preOutputTestResults(LLSD* sd) 
+{
+	incrementCurrentCount() ;
+	(*sd)[getCurrentLabelName()]["Name"] = mName ;
+}
+
+void LLMetricPerformanceTesterBasic::postOutputTestResults(LLSD* sd)
+{
+	LLMutexLock lock(LLFastTimer::sLogLock);
+	LLFastTimer::sLogQueue.push((*sd));
+}
+
+void LLMetricPerformanceTesterBasic::outputTestResults() 
+{
+	LLSD sd;
+
+	preOutputTestResults(&sd) ; 
+	outputTestRecord(&sd) ;
+	postOutputTestResults(&sd) ;
+}
+
+void LLMetricPerformanceTesterBasic::addMetric(std::string str)
+{
+	mMetricStrings.push_back(str) ;
+}
+
+/*virtual*/ 
+void LLMetricPerformanceTesterBasic::analyzePerformance(std::ofstream* os, LLSD* base, LLSD* current) 
+{
+	resetCurrentCount() ;
+
+	std::string current_label = getCurrentLabelName();
+	BOOL in_base = (*base).has(current_label) ;
+	BOOL in_current = (*current).has(current_label) ;
+
+	while(in_base || in_current)
+	{
+		LLSD::String label = current_label ;		
+
+		if(in_base && in_current)
+		{				
+			*os << llformat("%s\n", label.c_str()) ;
+
+			for(U32 index = 0 ; index < mMetricStrings.size() ; index++)
+			{
+				switch((*current)[label][ mMetricStrings[index] ].type())
+				{
+				case LLSD::TypeInteger:
+					compareTestResults(os, mMetricStrings[index], 
+						(S32)((*base)[label][ mMetricStrings[index] ].asInteger()), (S32)((*current)[label][ mMetricStrings[index] ].asInteger())) ;
+					break ;
+				case LLSD::TypeReal:
+					compareTestResults(os, mMetricStrings[index], 
+						(F32)((*base)[label][ mMetricStrings[index] ].asReal()), (F32)((*current)[label][ mMetricStrings[index] ].asReal())) ;
+					break;
+				default:
+					llerrs << "unsupported metric " << mMetricStrings[index] << " LLSD type: " << (S32)(*current)[label][ mMetricStrings[index] ].type() << llendl ;
+				}
+			}	
+		}
+
+		incrementCurrentCount();
+		current_label = getCurrentLabelName();
+		in_base = (*base).has(current_label) ;
+		in_current = (*current).has(current_label) ;
+	}
+}
+
+/*virtual*/ 
+void LLMetricPerformanceTesterBasic::compareTestResults(std::ofstream* os, std::string metric_string, S32 v_base, S32 v_current) 
+{
+	*os << llformat(" ,%s, %d, %d, %d, %.4f\n", metric_string.c_str(), v_base, v_current, 
+						v_current - v_base, (v_base != 0) ? 100.f * v_current / v_base : 0) ;
+}
+
+/*virtual*/ 
+void LLMetricPerformanceTesterBasic::compareTestResults(std::ofstream* os, std::string metric_string, F32 v_base, F32 v_current) 
+{
+	*os << llformat(" ,%s, %.4f, %.4f, %.4f, %.4f\n", metric_string.c_str(), v_base, v_current,						
+						v_current - v_base, (fabs(v_base) > 0.0001f) ? 100.f * v_current / v_base : 0.f ) ;
+}
+
+//----------------------------------------------------------------------------------------------
+// LLMetricPerformanceTesterWithSession
+//----------------------------------------------------------------------------------------------
+
+LLMetricPerformanceTesterWithSession::LLMetricPerformanceTesterWithSession(std::string name) : 
+	LLMetricPerformanceTesterBasic(name),
+	mBaseSessionp(NULL),
+	mCurrentSessionp(NULL)
+{
+}
+
+LLMetricPerformanceTesterWithSession::~LLMetricPerformanceTesterWithSession()
+{
+	if (mBaseSessionp)
+	{
+		delete mBaseSessionp ;
+		mBaseSessionp = NULL ;
+	}
+	if (mCurrentSessionp)
+	{
+		delete mCurrentSessionp ;
+		mCurrentSessionp = NULL ;
+	}
+}
+
+/*virtual*/ 
+void LLMetricPerformanceTesterWithSession::analyzePerformance(std::ofstream* os, LLSD* base, LLSD* current) 
+{
+	// Load the base session
+	resetCurrentCount() ;
+	mBaseSessionp = loadTestSession(base) ;
+
+	// Load the current session
+	resetCurrentCount() ;
+	mCurrentSessionp = loadTestSession(current) ;
+
+	if (!mBaseSessionp || !mCurrentSessionp)
+	{
+		llerrs << "Error loading test sessions." << llendl ;
+	}
+
+	// Compare
+	compareTestSessions(os) ;
+
+	// Release memory
+	if (mBaseSessionp)
+	{
+		delete mBaseSessionp ;
+		mBaseSessionp = NULL ;
+	}
+	if (mCurrentSessionp)
+	{
+		delete mCurrentSessionp ;
+		mCurrentSessionp = NULL ;
+	}
+}
+
+
+//----------------------------------------------------------------------------------------------
+// LLTestSession
+//----------------------------------------------------------------------------------------------
+
+LLMetricPerformanceTesterWithSession::LLTestSession::~LLTestSession() 
+{
+}
+
diff --git a/indra/llcommon/llmetricperformancetester.h b/indra/llcommon/llmetricperformancetester.h
new file mode 100644
index 0000000000..925010ac96
--- /dev/null
+++ b/indra/llcommon/llmetricperformancetester.h
@@ -0,0 +1,206 @@
+/** 
+ * @file llmetricperformancetester.h 
+ * @brief LLMetricPerformanceTesterBasic and LLMetricPerformanceTesterWithSession classes definition
+ *
+ * $LicenseInfo:firstyear=2004&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_METRICPERFORMANCETESTER_H 
+#define LL_METRICPERFORMANCETESTER_H 
+
+const std::string DEFAULT_METRIC_NAME("metric");
+
+/**
+ * @class LLMetricPerformanceTesterBasic
+ * @brief Performance Metric Base Class
+ */
+class LL_COMMON_API LLMetricPerformanceTesterBasic
+{
+public:
+	/**
+	 * @brief Creates a basic tester instance.
+	 * @param[in] name - Unique string identifying this tester instance.
+	 */
+	LLMetricPerformanceTesterBasic(std::string name);
+	virtual ~LLMetricPerformanceTesterBasic();
+
+	/**
+	 * @return Returns true if the instance has been added to the tester map.
+	 * Need to be tested after creation of a tester instance so to know if the tester is correctly handled.
+	 * A tester might not be added to the map if another tester with the same name already exists.
+	 */
+	BOOL isValid() const { return mValidInstance; }
+
+	/**
+	 * @brief Write a set of test results to the log LLSD.
+	 */
+	void outputTestResults() ;
+
+	/**
+	 * @brief Compare the test results.
+	 * By default, compares the test results against the baseline one by one, item by item, 
+	 * in the increasing order of the LLSD record counter, starting from the first one.
+	 */
+	virtual void analyzePerformance(std::ofstream* os, LLSD* base, LLSD* current) ;
+
+	/**
+	 * @return Returns the number of the test metrics in this tester instance.
+	 */
+	S32 getNumberOfMetrics() const { return mMetricStrings.size() ;}
+	/**
+	 * @return Returns the metric name at index
+	 * @param[in] index - Index on the list of metrics managed by this tester instance.
+	 */
+	std::string getMetricName(S32 index) const { return mMetricStrings[index] ;}
+
+protected:
+	/**
+	 * @return Returns the name of this tester instance.
+	 */
+	std::string getTesterName() const { return mName ;}
+
+	/**
+	 * @brief Insert a new metric to be managed by this tester instance.
+	 * @param[in] str - Unique string identifying the new metric.
+	 */
+	void addMetric(std::string str) ;
+
+	/**
+	 * @brief Compare test results, provided in 2 flavors: compare integers and compare floats.
+	 * @param[out] os - Formatted output string holding the compared values.
+	 * @param[in] metric_string - Name of the metric.
+	 * @param[in] v_base - Base value of the metric.
+	 * @param[in] v_current - Current value of the metric.
+	 */
+	virtual void compareTestResults(std::ofstream* os, std::string metric_string, S32 v_base, S32 v_current) ;
+	virtual void compareTestResults(std::ofstream* os, std::string metric_string, F32 v_base, F32 v_current) ;
+
+	/**
+	 * @brief Reset internal record count. Count starts with 1.
+	 */
+	void resetCurrentCount() { mCount = 1; }
+	/**
+	 * @brief Increment internal record count.
+	 */
+	void incrementCurrentCount() { mCount++; }
+	/**
+	 * @return Returns the label to be used for the current count. It's "TesterName"-"Count".
+	 */
+	std::string getCurrentLabelName() const { return llformat("%s-%d", mName.c_str(), mCount) ;}
+
+	/**
+	 * @brief Write a test record to the LLSD. Implementers need to overload this method.
+	 * @param[out] sd - The LLSD record to store metric data into.
+	 */
+	virtual void outputTestRecord(LLSD* sd) = 0 ;
+
+private:
+	void preOutputTestResults(LLSD* sd) ;
+	void postOutputTestResults(LLSD* sd) ;
+
+	std::string mName ;							// Name of this tester instance
+	S32 mCount ;								// Current record count
+	BOOL mValidInstance;						// TRUE if the instance is managed by the map
+	std::vector< std::string > mMetricStrings ; // Metrics strings
+
+// Static members managing the collection of testers
+public:	
+	// Map of all the tester instances in use
+	typedef std::map< std::string, LLMetricPerformanceTesterBasic* > name_tester_map_t;	
+	static name_tester_map_t sTesterMap ;
+
+	/**
+	 * @return Returns a pointer to the tester
+	 * @param[in] name - Name of the tester instance queried.
+	 */
+	static LLMetricPerformanceTesterBasic* getTester(std::string name) ;
+	
+	/**
+	 * @return Returns TRUE if that metric *or* the default catch all metric has been requested to be logged
+	 * @param[in] name - Name of the tester queried.
+	 */
+	static BOOL isMetricLogRequested(std::string name);
+	
+	/**
+	 * @return Returns TRUE if there's a tester defined, FALSE otherwise.
+	 */
+	static BOOL hasMetricPerformanceTesters() { return !sTesterMap.empty() ;}
+	/**
+	 * @brief Delete all testers and reset the tester map
+	 */
+	static void cleanClass() ;
+
+private:
+	// Add a tester to the map. Returns false if adding fails.
+	static BOOL addTester(LLMetricPerformanceTesterBasic* tester) ;
+};
+
+/**
+ * @class LLMetricPerformanceTesterWithSession
+ * @brief Performance Metric Class with custom session 
+ */
+class LL_COMMON_API LLMetricPerformanceTesterWithSession : public LLMetricPerformanceTesterBasic
+{
+public:
+	/**
+	 * @param[in] name - Unique string identifying this tester instance.
+	 */
+	LLMetricPerformanceTesterWithSession(std::string name);
+	virtual ~LLMetricPerformanceTesterWithSession();
+
+	/**
+	 * @brief Compare the test results.
+	 * This will be loading the base and current sessions and compare them using the virtual 
+	 * abstract methods loadTestSession() and compareTestSessions()
+	 */
+	virtual void analyzePerformance(std::ofstream* os, LLSD* base, LLSD* current) ;
+
+protected:
+	/**
+	 * @class LLMetricPerformanceTesterWithSession::LLTestSession
+	 * @brief Defines an interface for the two abstract virtual functions loadTestSession() and compareTestSessions()
+	 */
+	class LL_COMMON_API LLTestSession
+		{
+		public:
+			virtual ~LLTestSession() ;
+		};
+
+	/**
+	 * @brief Convert an LLSD log into a test session.
+	 * @param[in] log - The LLSD record
+	 * @return Returns the record as a test session
+	 */
+	virtual LLMetricPerformanceTesterWithSession::LLTestSession* loadTestSession(LLSD* log) = 0;
+
+	/**
+	 * @brief Compare the base session and the target session. Assumes base and current sessions have been loaded.
+	 * @param[out] os - The comparison result as a standard stream
+	 */
+	virtual void compareTestSessions(std::ofstream* os) = 0;
+
+	LLTestSession* mBaseSessionp;
+	LLTestSession* mCurrentSessionp;
+};
+
+#endif
+
diff --git a/indra/llcommon/llprocesslauncher.cpp b/indra/llcommon/llprocesslauncher.cpp
index 99308c94e7..81e5f8820d 100644
--- a/indra/llcommon/llprocesslauncher.cpp
+++ b/indra/llcommon/llprocesslauncher.cpp
@@ -58,6 +58,11 @@ void LLProcessLauncher::setWorkingDirectory(const std::string &dir)
 	mWorkingDir = dir;
 }
 
+const std::string& LLProcessLauncher::getExecutable() const
+{
+	return mExecutable;
+}
+
 void LLProcessLauncher::clearArguments()
 {
 	mLaunchArguments.clear();
diff --git a/indra/llcommon/llprocesslauncher.h b/indra/llcommon/llprocesslauncher.h
index 479aeb664a..954c249147 100644
--- a/indra/llcommon/llprocesslauncher.h
+++ b/indra/llcommon/llprocesslauncher.h
@@ -47,6 +47,8 @@ public:
 	void setExecutable(const std::string &executable);
 	void setWorkingDirectory(const std::string &dir);
 
+	const std::string& getExecutable() const;
+
 	void clearArguments();
 	void addArgument(const std::string &arg);
 	void addArgument(const char *arg);
diff --git a/indra/llcommon/llthread.cpp b/indra/llcommon/llthread.cpp
index 84da54f26d..f0b7ac5def 100644
--- a/indra/llcommon/llthread.cpp
+++ b/indra/llcommon/llthread.cpp
@@ -78,9 +78,6 @@ void *APR_THREAD_FUNC LLThread::staticRun(apr_thread_t *apr_threadp, void *datap
 {
 	LLThread *threadp = (LLThread *)datap;
 
-	// Set thread state to running
-	threadp->mStatus = RUNNING;
-
 #if !LL_DARWIN
 	sThreadID = threadp->mID;
 #endif
@@ -168,26 +165,45 @@ void LLThread::shutdown()
 		{
 			// This thread just wouldn't stop, even though we gave it time
 			//llwarns << "LLThread::~LLThread() exiting thread before clean exit!" << llendl;
+			// Put a stake in its heart.
+			apr_thread_exit(mAPRThreadp, -1);
 			return;
 		}
 		mAPRThreadp = NULL;
 	}
 
 	delete mRunCondition;
+	mRunCondition = 0;
 	
-	if (mIsLocalPool)
+	if (mIsLocalPool && mAPRPoolp)
 	{
 		apr_pool_destroy(mAPRPoolp);
+		mAPRPoolp = 0;
 	}
 }
 
 
 void LLThread::start()
 {
-	apr_thread_create(&mAPRThreadp, NULL, staticRun, (void *)this, mAPRPoolp);	
+	llassert(isStopped());
+	
+	// Set thread state to running
+	mStatus = RUNNING;
 
-	// We won't bother joining
-	apr_thread_detach(mAPRThreadp);
+	apr_status_t status =
+		apr_thread_create(&mAPRThreadp, NULL, staticRun, (void *)this, mAPRPoolp);
+	
+	if(status == APR_SUCCESS)
+	{	
+		// We won't bother joining
+		apr_thread_detach(mAPRThreadp);
+	}
+	else
+	{
+		mStatus = STOPPED;
+		llwarns << "failed to start thread " << mName << llendl;
+		ll_apr_warn_status(status);
+	}
 }
 
 //============================================================================
diff --git a/indra/llcommon/llthreadsafequeue.cpp b/indra/llcommon/llthreadsafequeue.cpp
new file mode 100644
index 0000000000..8a73e632a9
--- /dev/null
+++ b/indra/llcommon/llthreadsafequeue.cpp
@@ -0,0 +1,109 @@
+/** 
+ * @file llthread.cpp
+ *
+ * $LicenseInfo:firstyear=2004&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+#include <apr_pools.h>
+#include <apr_queue.h>
+#include "llthreadsafequeue.h"
+
+
+
+// LLThreadSafeQueueImplementation
+//-----------------------------------------------------------------------------
+
+
+LLThreadSafeQueueImplementation::LLThreadSafeQueueImplementation(apr_pool_t * pool, unsigned int capacity):
+	mOwnsPool(pool == 0),
+	mPool(pool),
+	mQueue(0)
+{
+	if(mOwnsPool) {
+		apr_status_t status = apr_pool_create(&mPool, 0);
+		if(status != APR_SUCCESS) throw LLThreadSafeQueueError("failed to allocate pool");
+	} else {
+		; // No op.
+	}
+	
+	apr_status_t status = apr_queue_create(&mQueue, capacity, mPool);
+	if(status != APR_SUCCESS) throw LLThreadSafeQueueError("failed to allocate queue");
+}
+
+
+LLThreadSafeQueueImplementation::~LLThreadSafeQueueImplementation()
+{
+	if(mQueue != 0) {
+		if(apr_queue_size(mQueue) != 0) llwarns << 
+			"terminating queue which still contains " << apr_queue_size(mQueue) <<
+			" elements;" << "memory will be leaked" << LL_ENDL;
+		apr_queue_term(mQueue);
+	}
+	if(mOwnsPool && (mPool != 0)) apr_pool_destroy(mPool);
+}
+
+
+void LLThreadSafeQueueImplementation::pushFront(void * element)
+{
+	apr_status_t status = apr_queue_push(mQueue, element);
+	
+	if(status == APR_EINTR) {
+		throw LLThreadSafeQueueInterrupt();
+	} else if(status != APR_SUCCESS) {
+		throw LLThreadSafeQueueError("push failed");
+	} else {
+		; // Success.
+	}
+}
+
+
+bool LLThreadSafeQueueImplementation::tryPushFront(void * element){
+	return apr_queue_trypush(mQueue, element) == APR_SUCCESS;
+}
+
+
+void * LLThreadSafeQueueImplementation::popBack(void)
+{
+	void * element;
+	apr_status_t status = apr_queue_pop(mQueue, &element);
+
+	if(status == APR_EINTR) {
+		throw LLThreadSafeQueueInterrupt();
+	} else if(status != APR_SUCCESS) {
+		throw LLThreadSafeQueueError("pop failed");
+	} else {
+		return element;
+	}
+}
+
+
+bool LLThreadSafeQueueImplementation::tryPopBack(void *& element)
+{
+	return apr_queue_trypop(mQueue, &element) == APR_SUCCESS;
+}
+
+
+size_t LLThreadSafeQueueImplementation::size()
+{
+	return apr_queue_size(mQueue);
+}
diff --git a/indra/llcommon/llthreadsafequeue.h b/indra/llcommon/llthreadsafequeue.h
new file mode 100644
index 0000000000..58cac38769
--- /dev/null
+++ b/indra/llcommon/llthreadsafequeue.h
@@ -0,0 +1,205 @@
+/** 
+ * @file llthreadsafequeue.h
+ * @brief Base classes for thread, mutex and condition handling.
+ *
+ * $LicenseInfo:firstyear=2004&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLTHREADSAFEQUEUE_H
+#define LL_LLTHREADSAFEQUEUE_H
+
+
+#include <string>
+#include <stdexcept>
+
+
+struct apr_pool_t; // From apr_pools.h
+class LLThreadSafeQueueImplementation; // See below.
+
+
+//
+// A general queue exception.
+//
+class LL_COMMON_API LLThreadSafeQueueError:
+public std::runtime_error
+{
+public:
+	LLThreadSafeQueueError(std::string const & message):
+	std::runtime_error(message)
+	{
+		; // No op.
+	}
+};
+
+
+//
+// An exception raised when blocking operations are interrupted.
+//
+class LL_COMMON_API LLThreadSafeQueueInterrupt:
+	public LLThreadSafeQueueError
+{
+public:
+	LLThreadSafeQueueInterrupt(void):
+		LLThreadSafeQueueError("queue operation interrupted")
+	{
+		; // No op.
+	}
+};
+
+
+struct apr_queue_t; // From apr_queue.h
+
+
+//
+// Implementation details. 
+//
+class LL_COMMON_API LLThreadSafeQueueImplementation
+{
+public:
+	LLThreadSafeQueueImplementation(apr_pool_t * pool, unsigned int capacity);
+	~LLThreadSafeQueueImplementation();
+	void pushFront(void * element);
+	bool tryPushFront(void * element);
+	void * popBack(void);
+	bool tryPopBack(void *& element);
+	size_t size();
+	
+private:
+	bool mOwnsPool;
+	apr_pool_t * mPool;
+	apr_queue_t * mQueue;
+};
+
+
+//
+// Implements a thread safe FIFO.
+//
+template<typename ElementT>
+class LLThreadSafeQueue
+{
+public:
+	typedef ElementT value_type;
+	
+	// If the pool is set to NULL one will be allocated and managed by this
+	// queue.
+	LLThreadSafeQueue(apr_pool_t * pool = 0, unsigned int capacity = 1024);
+	
+	// Add an element to the front of queue (will block if the queue has
+	// reached capacity).
+	//
+	// This call will raise an interrupt error if the queue is deleted while
+	// the caller is blocked.
+	void pushFront(ElementT const & element);
+	
+	// Try to add an element to the front ofqueue without blocking. Returns
+	// true only if the element was actually added.
+	bool tryPushFront(ElementT const & element);
+	
+	// Pop the element at the end of the queue (will block if the queue is
+	// empty).
+	//
+	// This call will raise an interrupt error if the queue is deleted while
+	// the caller is blocked.
+	ElementT popBack(void);
+	
+	// Pop an element from the end of the queue if there is one available.
+	// Returns true only if an element was popped.
+	bool tryPopBack(ElementT & element);
+	
+	// Returns the size of the queue.
+	size_t size();
+
+private:
+	LLThreadSafeQueueImplementation mImplementation;
+};
+
+
+
+// LLThreadSafeQueue
+//-----------------------------------------------------------------------------
+
+
+template<typename ElementT>
+LLThreadSafeQueue<ElementT>::LLThreadSafeQueue(apr_pool_t * pool, unsigned int capacity):
+	mImplementation(pool, capacity)
+{
+	; // No op.
+}
+
+
+template<typename ElementT>
+void LLThreadSafeQueue<ElementT>::pushFront(ElementT const & element)
+{
+	ElementT * elementCopy = new ElementT(element);
+	try {
+		mImplementation.pushFront(elementCopy);
+	} catch (LLThreadSafeQueueInterrupt) {
+		delete elementCopy;
+		throw;
+	}
+}
+
+
+template<typename ElementT>
+bool LLThreadSafeQueue<ElementT>::tryPushFront(ElementT const & element)
+{
+	ElementT * elementCopy = new ElementT(element);
+	bool result = mImplementation.tryPushFront(elementCopy);
+	if(!result) delete elementCopy;
+	return result;
+}
+
+
+template<typename ElementT>
+ElementT LLThreadSafeQueue<ElementT>::popBack(void)
+{
+	ElementT * element = reinterpret_cast<ElementT *> (mImplementation.popBack());
+	ElementT result(*element);
+	delete element;
+	return result;
+}
+
+
+template<typename ElementT>
+bool LLThreadSafeQueue<ElementT>::tryPopBack(ElementT & element)
+{
+	void * storedElement;
+	bool result = mImplementation.tryPopBack(storedElement);
+	if(result) {
+		ElementT * elementPtr = reinterpret_cast<ElementT *>(storedElement); 
+		element = *elementPtr;
+		delete elementPtr;
+	} else {
+		; // No op.
+	}
+	return result;
+}
+
+
+template<typename ElementT>
+size_t LLThreadSafeQueue<ElementT>::size(void)
+{
+	return mImplementation.size();
+}
+
+
+#endif
diff --git a/indra/llcommon/llversionviewer.h b/indra/llcommon/llversionviewer.h
index b209e4aa38..d6fa5b1997 100644
--- a/indra/llcommon/llversionviewer.h
+++ b/indra/llcommon/llversionviewer.h
@@ -28,7 +28,7 @@
 #define LL_LLVERSIONVIEWER_H
 
 const S32 LL_VERSION_MAJOR = 2;
-const S32 LL_VERSION_MINOR = 4;
+const S32 LL_VERSION_MINOR = 5;
 const S32 LL_VERSION_PATCH = 0;
 const S32 LL_VERSION_BUILD = 0;