- attempt to fix game freeze when lag causes game pauses

source/glest_game/game/commander.cpp

@@ -37,6 +37,135 @@ namespace Glest{ namespace Game{
 
 // ===================== PUBLIC ========================
 
+CommanderNetworkThread::CommanderNetworkThread() : BaseThread() {
+	this->idStatus = make_pair<int,bool>(-1,false);
+	this->commanderInterface = NULL;
+}
+
+CommanderNetworkThread::CommanderNetworkThread(CommanderNetworkCallbackInterface *commanderInterface) : BaseThread() {
+	this->idStatus = make_pair<int,bool>(-1,false);
+	this->commanderInterface = commanderInterface;
+}
+
+void CommanderNetworkThread::setQuitStatus(bool value) {
+	SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d value = %d\n",__FILE__,__FUNCTION__,__LINE__,value);
+
+	BaseThread::setQuitStatus(value);
+	if(value == true) {
+		signalUpdate(-1);
+	}
+
+	SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
+}
+
+void CommanderNetworkThread::signalUpdate(int id) {
+	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d] event = %p\n",__FILE__,__FUNCTION__,__LINE__,event);
+
+	MutexSafeWrapper safeMutex(&idMutex);
+	this->idStatus.first = id;
+	this->idStatus.second = false;
+	safeMutex.ReleaseLock();
+
+	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
+	semTaskSignalled.signal();
+}
+
+void CommanderNetworkThread::setTaskCompleted(int id) {
+	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
+
+    MutexSafeWrapper safeMutex(&idMutex);
+    this->idStatus.second = true;
+    safeMutex.ReleaseLock();
+
+	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
+}
+
+bool CommanderNetworkThread::isSignalCompleted(int id) {
+	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d] slotIndex = %d\n",__FILE__,__FUNCTION__,__LINE__,slotIndex);
+	MutexSafeWrapper safeMutex(&idMutex);
+	bool result = this->idStatus.second;
+	safeMutex.ReleaseLock();
+	//if(result == false) SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d] slotIndex = %d, result = %d\n",__FILE__,__FUNCTION__,__LINE__,slotIndex,result);
+	return result;
+}
+
+void CommanderNetworkThread::execute() {
+    RunningStatusSafeWrapper runningStatus(this);
+	try {
+		//setRunningStatus(true);
+		SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+
+		unsigned int idx = 0;
+		for(;this->commanderInterface != NULL;) {
+			if(getQuitStatus() == true) {
+				SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+				break;
+			}
+
+			//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+			semTaskSignalled.waitTillSignalled();
+			//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
+
+			if(getQuitStatus() == true) {
+				SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+				break;
+			}
+
+			//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+
+            MutexSafeWrapper safeMutex(&idMutex);
+            if(idStatus.first > 0) {
+                int updateId = this->idStatus.first;
+                safeMutex.ReleaseLock();
+
+                this->commanderInterface->commanderNetworkUpdateTask(updateId);
+                setTaskCompleted(updateId);
+            }
+            else {
+                safeMutex.ReleaseLock();
+            }
+			//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
+
+			if(getQuitStatus() == true) {
+				SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+				break;
+			}
+			//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
+		}
+
+		SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+	}
+	catch(const exception &ex) {
+		//setRunningStatus(false);
+
+		SystemFlags::OutputDebug(SystemFlags::debugError,"In [%s::%s Line: %d] Error [%s]\n",__FILE__,__FUNCTION__,__LINE__,ex.what());
+		SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+
+		throw runtime_error(ex.what());
+	}
+	SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
+	//setRunningStatus(false);
+}
+
+// =====================================================
+//	class
+// =====================================================
+
+Commander::Commander() {
+	this->networkThread = new CommanderNetworkThread(this);
+	this->networkThread->setUniqueID(__FILE__);
+	this->networkThread->start();
+}
+
+Commander::~Commander() {
+	if(BaseThread::shutdownAndWait(networkThread) == true) {
+        SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+        delete networkThread;
+        SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+	}
+	networkThread = NULL;
+}
+
 void Commander::init(World *world){
 	this->world= world;
 }
@@ -325,11 +454,29 @@ CommandResult Commander::pushNetworkCommand(const NetworkCommand* networkCommand
 	return cr;
 }
 
-void Commander::updateNetwork() {
+void Commander::signalNetworkUpdate(Game *game) {
+    if(this->networkThread != NULL) {
+        this->game = game;
+        this->networkThread->signalUpdate(1);
+
+        time_t elapsedWait = time(NULL);
+        for(;difftime(time(NULL),elapsedWait) <= 4 &&
+             this->networkThread->isSignalCompleted(1) == false;) {
+            game->render();
+        }
+    }
+}
+
+void Commander::commanderNetworkUpdateTask(int id) {
+    updateNetwork(game);
+}
+
+void Commander::updateNetwork(Game *game) {
 	NetworkManager &networkManager= NetworkManager::getInstance();
 
 	//check that this is a keyframe
-	GameSettings *gameSettings = this->world->getGame()->getGameSettings();
+	//GameSettings *gameSettings = this->world->getGame()->getGameSettings();
+	GameSettings *gameSettings = game->getGameSettings();
 	if( networkManager.isNetworkGame() == false ||
 		(world->getFrameCount() % gameSettings->getNetworkFramePeriod()) == 0) {
 

source/glest_game/game/commander.h

@@ -18,6 +18,7 @@
 #include "selection.h"
 #include "command_type.h"
 #include "platform_util.h"
+#include "base_thread.h"
 #include "leak_dumper.h"
 
 using std::vector;
@@ -32,6 +33,7 @@ class Unit;
 class Command;
 class CommandType;
 class NetworkCommand;
+class Game;
 
 // =====================================================
 // 	class Commander
@@ -39,7 +41,35 @@ class NetworkCommand;
 ///	Gives commands to the units
 // =====================================================
 
-class Commander{
+//
+// This interface describes the methods a callback object must implement
+//
+class CommanderNetworkCallbackInterface {
+public:
+	virtual void commanderNetworkUpdateTask(int id) = 0;
+};
+
+class CommanderNetworkThread : public BaseThread
+{
+protected:
+
+	CommanderNetworkCallbackInterface *commanderInterface;
+	Semaphore semTaskSignalled;
+
+	virtual void setQuitStatus(bool value);
+	virtual void setTaskCompleted(int id);
+	Mutex idMutex;
+	std::pair<int,bool> idStatus;
+
+public:
+	CommanderNetworkThread();
+	CommanderNetworkThread(CommanderNetworkCallbackInterface *commanderInterface);
+    virtual void execute();
+    void signalUpdate(int id);
+    bool isSignalCompleted(int id);
+};
+
+class Commander : public CommanderNetworkCallbackInterface {
 private:
 	typedef vector<CommandResult> CommandResultContainer;
 
@@ -47,9 +77,16 @@ private:
     World *world;
 	Chrono perfTimer;
 
+	CommanderNetworkThread *networkThread;
+	Game *game;
+
 public:
+    Commander();
+    ~Commander();
+
+    void signalNetworkUpdate(Game *game);
     void init(World *world);
-	void updateNetwork();
+	void updateNetwork(Game *game);
 
 	CommandResult tryGiveCommand(const Selection *selection, const CommandType *commandType,
 										const Vec2i &pos, const UnitType* unitType,
@@ -68,6 +105,8 @@ private:
     CommandResult computeResult(const CommandResultContainer &results) const;
 	void giveNetworkCommand(NetworkCommand* networkCommand) const;
 	Command* buildCommand(const NetworkCommand* networkCommand) const;
+
+	virtual void commanderNetworkUpdateTask(int id);
 };
 
 }} //end namespace

source/glest_game/game/game.cpp

@@ -735,7 +735,9 @@ void Game::update() {
 
 			//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
 			// Commander
-			commander.updateNetwork();
+			//commander.updateNetwork();
+			commander.signalNetworkUpdate(this);
+
 			if(chrono.getMillis() > 0) SystemFlags::OutputDebug(SystemFlags::debugPerformance,"In [%s::%s] Line: %d took msecs: %lld [commander updateNetwork i = %d]\n",__FILE__,__FUNCTION__,__LINE__,chrono.getMillis(),i);
 			if(chrono.getMillis() > 0) chrono.start();
 

source/glest_game/network/connection_slot.cpp

@@ -62,30 +62,60 @@ void ConnectionSlotThread::signalUpdate(ConnectionSlotEvent *event) {
 
 	if(event != NULL) {
 		MutexSafeWrapper safeMutex(&triggerIdMutex);
-		eventList.push_back(event);
+		eventList.push_back(*event);
 		safeMutex.ReleaseLock();
 	}
 	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
 	semTaskSignalled.signal();
 }
 
-void ConnectionSlotThread::setTaskCompleted(ConnectionSlotEvent *event) {
+void ConnectionSlotThread::setTaskCompleted(int eventId) {
 	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
 
-	if(event != NULL) {
+	if(eventId > 0) {
 		MutexSafeWrapper safeMutex(&triggerIdMutex);
-		event->eventCompleted = true;
-        eventList.erase(eventList.begin());
+		//event->eventCompleted = true;
+		for(int i = 0; i < eventList.size(); ++i) {
+		    ConnectionSlotEvent &slotEvent = eventList[i];
+		    if(slotEvent.eventId == eventId) {
+                //eventList.erase(eventList.begin() + i);
+                slotEvent.eventCompleted = true;
+                break;
+		    }
+		}
 		safeMutex.ReleaseLock();
 	}
 
 	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
 }
 
+void ConnectionSlotThread::purgeCompletedEvents() {
+    MutexSafeWrapper safeMutex(&triggerIdMutex);
+    //event->eventCompleted = true;
+    for(int i = eventList.size() - 1; i >= 0; i--) {
+        ConnectionSlotEvent &slotEvent = eventList[i];
+        if(slotEvent.eventCompleted == true) {
+            eventList.erase(eventList.begin() + i);
+        }
+    }
+    safeMutex.ReleaseLock();
+}
+
 bool ConnectionSlotThread::isSignalCompleted(ConnectionSlotEvent *event) {
 	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d] slotIndex = %d\n",__FILE__,__FUNCTION__,__LINE__,slotIndex);
 	MutexSafeWrapper safeMutex(&triggerIdMutex);
-	bool result = (event != NULL ? event->eventCompleted : true);
+	//bool result = (event != NULL ? event->eventCompleted : true);
+	bool result = false;
+    if(event != NULL) {
+        for(int i = 0; i < eventList.size(); ++i) {
+            ConnectionSlotEvent &slotEvent = eventList[i];
+            if(slotEvent.eventId == event->eventId) {
+                //eventList.erase(eventList.begin() + i);
+                result = slotEvent.eventCompleted;
+                break;
+            }
+        }
+    }
 	safeMutex.ReleaseLock();
 	//if(result == false) SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d] slotIndex = %d, result = %d\n",__FILE__,__FUNCTION__,__LINE__,slotIndex,result);
 	return result;
@@ -118,11 +148,22 @@ void ConnectionSlotThread::execute() {
             MutexSafeWrapper safeMutex(&triggerIdMutex);
             int eventCount = eventList.size();
             if(eventCount > 0) {
-                ConnectionSlotEvent *event = eventList[0];
+                ConnectionSlotEvent *event = NULL;
+
+                for(int i = 0; i < eventList.size(); ++i) {
+                    ConnectionSlotEvent &slotEvent = eventList[i];
+                    if(slotEvent.eventCompleted == false) {
+                        event = &slotEvent;
+                        break;
+                    }
+                }
+
                 safeMutex.ReleaseLock();
 
-                this->slotInterface->slotUpdateTask(event);
-                setTaskCompleted(event);
+                if(event != NULL) {
+                    this->slotInterface->slotUpdateTask(event);
+                    setTaskCompleted(event->eventId);
+                }
             }
             else {
                 safeMutex.ReleaseLock();
@@ -201,6 +242,9 @@ ConnectionSlot::~ConnectionSlot() {
 }
 
 void ConnectionSlot::update() {
+    if(slotThreadWorker != NULL) {
+        slotThreadWorker->purgeCompletedEvents();
+    }
     update(true);
 }
 

source/glest_game/network/connection_slot.h

@@ -49,6 +49,7 @@ public:
 		networkMessage = NULL;
 		socketTriggered = false;
 		eventCompleted = false;
+		eventId = -1;
 	}
 
 	int64 triggerId;
@@ -57,6 +58,7 @@ public:
 	const NetworkMessage *networkMessage;
 	bool socketTriggered;
 	bool eventCompleted;
+	int64 eventId;
 };
 
 //
@@ -74,11 +76,11 @@ protected:
 	ConnectionSlotCallbackInterface *slotInterface;
 	Semaphore semTaskSignalled;
 	Mutex triggerIdMutex;
-	vector<ConnectionSlotEvent *> eventList;
+	vector<ConnectionSlotEvent> eventList;
 	int slotIndex;
 
 	virtual void setQuitStatus(bool value);
-	virtual void setTaskCompleted(ConnectionSlotEvent *event);
+	virtual void setTaskCompleted(int eventId);
 
 public:
 	ConnectionSlotThread(int slotIndex);
@@ -87,6 +89,8 @@ public:
     void signalUpdate(ConnectionSlotEvent *event);
     bool isSignalCompleted(ConnectionSlotEvent *event);
     int getSlotIndex() const {return slotIndex; }
+
+    void purgeCompletedEvents();
 };
 
 // =====================================================

source/glest_game/network/server_interface.cpp

@@ -58,10 +58,11 @@ double LAG_CHECK_GRACE_PERIOD = 15;
 
 // The max amount of time to 'freeze' gameplay per packet when a client is lagging
 // badly and we want to give time for them to catch up
-double MAX_CLIENT_WAIT_SECONDS_FOR_PAUSE = 1;
+double MAX_CLIENT_WAIT_SECONDS_FOR_PAUSE = 2;
 
 ServerInterface::ServerInterface() : GameNetworkInterface() {
     SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+    nextEventId = 1;
     gameHasBeenInitiated    = false;
     exitServer = false;
     gameSettingsUpdateCount = 0;
@@ -349,11 +350,21 @@ int ServerInterface::getConnectedSlotCount() {
 	return connectedSlotCount;
 }
 
+int64 ServerInterface::getNextEventId() {
+    nextEventId++;
+
+    // Rollover when # gets large
+    if(nextEventId > INT_MAX) {
+        nextEventId = 1;
+    }
+    return nextEventId;
+}
+
 void ServerInterface::slotUpdateTask(ConnectionSlotEvent *event) {
 	SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
 
 	if(event != NULL) {
-		SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+		SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d] event->eventType = %d\n",__FILE__,__FUNCTION__,__LINE__,event->eventType);
 
 		if(event->eventType == eSendSocketData) {
 			SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] before sendMessage, event->networkMessage = %p\n",__FILE__,__FUNCTION__,event->networkMessage);
@@ -364,6 +375,9 @@ void ServerInterface::slotUpdateTask(ConnectionSlotEvent *event) {
 			SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
 			updateSlot(event);
 		}
+		else {
+		    SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
+		}
 	}
 	SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
 }
@@ -536,6 +550,7 @@ bool ServerInterface::signalClientReceiveCommands(ConnectionSlot* connectionSlot
 	event.connectionSlot = connectionSlot;
 	event.socketTriggered = socketTriggered;
 	event.triggerId = slotIndex;
+	event.eventId = getNextEventId();
 
 	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d] slotIndex = %d\n",__FILE__,__FUNCTION__,__LINE__,slotIndex);
 
@@ -580,6 +595,7 @@ void ServerInterface::validateConnectedClients() {
 void ServerInterface::update() {
 	//SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d\n",__FILE__,__FUNCTION__,__LINE__);
 
+    const int MAX_SLOT_THREAD_WAIT_TIME = 3;
 	std::vector<string> errorMsgList;
 	try {
 		// The first thing we will do is check all clients to ensure they have
@@ -619,7 +635,6 @@ void ServerInterface::update() {
 
 				// Step #2 check all connection slot worker threads for completed status
 				time_t waitForThreadElapsed = time(NULL);
-				const int MAX_SLOT_THREAD_WAIT_TIME = 6;
 				std::map<int,bool> slotsCompleted;
 				for(bool threadsDone = false;
                     exitServer == false && threadsDone == false &&
@@ -725,7 +740,10 @@ void ServerInterface::update() {
 											if(connectionSlot != NULL) {
 												SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s] Line: %d, clientLagExceededOrWarned.first = %d, clientLagExceededOrWarned.second = %d\n",__FILE__,__FUNCTION__,__LINE__,clientLagExceededOrWarned.first,clientLagExceededOrWarned.second);
 
-												bool socketTriggered = (connectionSlot != NULL && connectionSlot->getSocket() != NULL ? socketTriggeredList[connectionSlot->getSocket()->getSocketId()] : false);
+												bool socketTriggered = false;
+												if(connectionSlot->getSocket() != NULL && connectionSlot->getSocket()->getSocketId() > 0) {
+                                                    socketTriggered = socketTriggeredList[connectionSlot->getSocket()->getSocketId()];
+												}
 												ConnectionSlotEvent &event = eventList[i];
 												mapSlotSignalledList[i] = signalClientReceiveCommands(connectionSlot,i,socketTriggered,event);
 												threadsDone = false;
@@ -1249,6 +1267,7 @@ void ServerInterface::broadcastMessage(const NetworkMessage* networkMessage, int
                 event.connectionSlot        = connectionSlot;
                 event.socketTriggered       = true;
                 event.triggerId             = i;
+                event.eventId = getNextEventId();
 
                 SystemFlags::OutputDebug(SystemFlags::debugNetwork,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
 
@@ -1574,7 +1593,8 @@ void ServerInterface::simpleTask(BaseThread *callingThread) {
 	//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line %d]\n",__FILE__,__FUNCTION__,__LINE__);
 
 	MutexSafeWrapper safeMutex(&masterServerThreadAccessor,intToStr(__LINE__));
-	if(difftime(time(NULL),lastMasterserverHeartbeatTime) >= 30) {
+	const int MASTERSERVER_HEARTBEAT_GAME_STATUS_SECONDS = 30;
+	if(difftime(time(NULL),lastMasterserverHeartbeatTime) >= MASTERSERVER_HEARTBEAT_GAME_STATUS_SECONDS) {
 		SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line %d]\n",__FILE__,__FUNCTION__,__LINE__);
 
 		lastMasterserverHeartbeatTime = time(NULL);

source/glest_game/network/server_interface.h

@@ -55,6 +55,7 @@ private:
 
     Shared::PlatformCommon::FTPServerThread *ftpServer;
     bool exitServer;
+    int64 nextEventId;
 
 public:
 	ServerInterface();
@@ -135,6 +136,8 @@ private:
 	void validateConnectedClients();
 
 	std::map<string,string> publishToMasterserver();
+
+    int64 getNextEventId();
 };
 
 }}//end namespace

source/shared_lib/include/sound/openal/sound_player_openal.h

@@ -69,7 +69,7 @@ public:
 protected:
 	friend class SoundPlayerOpenAL;
 	static const size_t STREAMBUFFERSIZE = 1024 * 500;
-	static const size_t STREAMFRAGMENTS = 10;
+	static const size_t STREAMFRAGMENTS = 5;
 	static const size_t STREAMFRAGMENTSIZE
 		= STREAMBUFFERSIZE / STREAMFRAGMENTS;