42 files changed, 329 insertions, 1213 deletions

diff --git a/src/ByteBuffer.cpp b/src/ByteBuffer.cpp
index 012105ca1..080176dcd 100644
--- a/src/ByteBuffer.cpp
+++ b/src/ByteBuffer.cpp
@@ -111,26 +111,36 @@ public:
 
 #ifdef _DEBUG
 
-/// Simple RAII class that uses one internal unsigned long for checking if two threads are using an object simultanously
-class cSingleThreadAccessChecker
-{
-public:
-	cSingleThreadAccessChecker(unsigned long * a_ThreadID) :
-		m_ThreadID(a_ThreadID)
+	/** Simple RAII class that is used for checking that no two threads are using an object simultanously.
+	It requires the monitored object to provide the storage for a thread ID.
+	It uses that storage to check if the thread ID of consecutive calls is the same all the time. */
+	class cSingleThreadAccessChecker
 	{
-		ASSERT((*a_ThreadID == 0) || (*a_ThreadID == cIsThread::GetCurrentID()));
-	}
-	
-	~cSingleThreadAccessChecker()
-	{
-		*m_ThreadID = 0;
-	}
-	
-protected:
-	unsigned long * m_ThreadID;
-} ;
+	public:
+		cSingleThreadAccessChecker(std::thread::id * a_ThreadID) :
+			m_ThreadID(a_ThreadID)
+		{
+			ASSERT(
+				(*a_ThreadID == std::this_thread::get_id()) ||  // Either the object is used by current thread...
+				(*a_ThreadID == std::thread::id())              // ... or by no thread at all
+			);
+
+			// Mark as being used by this thread:
+			*m_ThreadID = std::this_thread::get_id();
+		}
+
+		~cSingleThreadAccessChecker()
+		{
+			// Mark as not being used by any thread:
+			*m_ThreadID = std::thread::id();
+		}
+
+	protected:
+		/** Points to the storage used for ID of the thread using the object. */
+		std::thread::id * m_ThreadID;
+	};
 
-#define CHECK_THREAD cSingleThreadAccessChecker Checker(const_cast<unsigned long *>(&m_ThreadID))
+	#define CHECK_THREAD cSingleThreadAccessChecker Checker(&m_ThreadID);
 
 #else
 	#define CHECK_THREAD
@@ -146,9 +156,6 @@ protected:
 cByteBuffer::cByteBuffer(size_t a_BufferSize) :
 	m_Buffer(new char[a_BufferSize + 1]),
 	m_BufferSize(a_BufferSize + 1),
-	#ifdef _DEBUG
-	m_ThreadID(0),
-	#endif  // _DEBUG
 	m_DataStart(0),
 	m_WritePos(0),
 	m_ReadPos(0)
@@ -174,7 +181,7 @@ cByteBuffer::~cByteBuffer()
 
 bool cByteBuffer::Write(const void * a_Bytes, size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 
 	// Store the current free space for a check after writing:
@@ -221,7 +228,7 @@ bool cByteBuffer::Write(const void * a_Bytes, size_t a_Count)
 
 size_t cByteBuffer::GetFreeSpace(void) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	if (m_WritePos >= m_DataStart)
 	{
@@ -243,7 +250,7 @@ size_t cByteBuffer::GetFreeSpace(void) const
 /// Returns the number of bytes that are currently in the ringbuffer. Note GetReadableBytes()
 size_t cByteBuffer::GetUsedSpace(void) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	ASSERT(m_BufferSize >= GetFreeSpace());
 	ASSERT((m_BufferSize - GetFreeSpace()) >= 1);
@@ -257,7 +264,7 @@ size_t cByteBuffer::GetUsedSpace(void) const
 /// Returns the number of bytes that are currently available for reading (may be less than UsedSpace due to some data having been read already)
 size_t cByteBuffer::GetReadableSpace(void) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	if (m_ReadPos > m_WritePos)
 	{
@@ -276,7 +283,7 @@ size_t cByteBuffer::GetReadableSpace(void) const
 
 bool cByteBuffer::CanReadBytes(size_t a_Count) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	return (a_Count <= GetReadableSpace());
 }
@@ -287,7 +294,7 @@ bool cByteBuffer::CanReadBytes(size_t a_Count) const
 
 bool cByteBuffer::CanWriteBytes(size_t a_Count) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	return (a_Count <= GetFreeSpace());
 }
@@ -298,7 +305,7 @@ bool cByteBuffer::CanWriteBytes(size_t a_Count) const
 
 bool cByteBuffer::ReadChar(char & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(1);
 	ReadBuf(&a_Value, 1);
@@ -311,7 +318,7 @@ bool cByteBuffer::ReadChar(char & a_Value)
 
 bool cByteBuffer::ReadByte(unsigned char & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(1);
 	ReadBuf(&a_Value, 1);
@@ -324,7 +331,7 @@ bool cByteBuffer::ReadByte(unsigned char & a_Value)
 
 bool cByteBuffer::ReadBEShort(short & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(2);
 	ReadBuf(&a_Value, 2);
@@ -338,7 +345,7 @@ bool cByteBuffer::ReadBEShort(short & a_Value)
 
 bool cByteBuffer::ReadBEInt(int & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(4);
 	ReadBuf(&a_Value, 4);
@@ -352,7 +359,7 @@ bool cByteBuffer::ReadBEInt(int & a_Value)
 
 bool cByteBuffer::ReadBEInt64(Int64 & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(8);
 	ReadBuf(&a_Value, 8);
@@ -366,7 +373,7 @@ bool cByteBuffer::ReadBEInt64(Int64 & a_Value)
 
 bool cByteBuffer::ReadBEFloat(float & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(4);
 	ReadBuf(&a_Value, 4);
@@ -380,7 +387,7 @@ bool cByteBuffer::ReadBEFloat(float & a_Value)
 
 bool cByteBuffer::ReadBEDouble(double & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(8);
 	ReadBuf(&a_Value, 8);
@@ -394,7 +401,7 @@ bool cByteBuffer::ReadBEDouble(double & a_Value)
 
 bool cByteBuffer::ReadBool(bool & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(1);
 	char Value = 0;
@@ -409,7 +416,7 @@ bool cByteBuffer::ReadBool(bool & a_Value)
 
 bool cByteBuffer::ReadBEUTF16String16(AString & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	short Length;
 	if (!ReadBEShort(Length))
@@ -430,7 +437,7 @@ bool cByteBuffer::ReadBEUTF16String16(AString & a_Value)
 
 bool cByteBuffer::ReadVarInt(UInt32 & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	UInt32 Value = 0;
 	int Shift = 0;
@@ -452,7 +459,7 @@ bool cByteBuffer::ReadVarInt(UInt32 & a_Value)
 
 bool cByteBuffer::ReadVarUTF8String(AString & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	UInt32 Size = 0;
 	if (!ReadVarInt(Size))
@@ -472,7 +479,7 @@ bool cByteBuffer::ReadVarUTF8String(AString & a_Value)
 
 bool cByteBuffer::ReadLEInt(int & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(4);
 	ReadBuf(&a_Value, 4);
@@ -491,6 +498,7 @@ bool cByteBuffer::ReadLEInt(int & a_Value)
 
 bool cByteBuffer::ReadPosition(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
 {
+	CHECK_THREAD
 	Int64 Value;
 	if (!ReadBEInt64(Value))
 	{
@@ -515,7 +523,7 @@ bool cByteBuffer::ReadPosition(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
 
 bool cByteBuffer::WriteChar(char a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(1);
 	return WriteBuf(&a_Value, 1);
@@ -527,7 +535,7 @@ bool cByteBuffer::WriteChar(char a_Value)
 
 bool cByteBuffer::WriteByte(unsigned char a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(1);
 	return WriteBuf(&a_Value, 1);
@@ -539,7 +547,7 @@ bool cByteBuffer::WriteByte(unsigned char a_Value)
 
 bool cByteBuffer::WriteBEShort(short a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(2);
 	u_short Converted = htons((u_short)a_Value);
@@ -552,7 +560,7 @@ bool cByteBuffer::WriteBEShort(short a_Value)
 
 bool cByteBuffer::WriteBEUShort(unsigned short a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(2);
 	u_short Converted = htons((u_short)a_Value);
@@ -565,7 +573,7 @@ bool cByteBuffer::WriteBEUShort(unsigned short a_Value)
 
 bool cByteBuffer::WriteBEInt(int a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(4);
 	UInt32 Converted = HostToNetwork4(&a_Value);
@@ -578,7 +586,7 @@ bool cByteBuffer::WriteBEInt(int a_Value)
 
 bool cByteBuffer::WriteBEInt64(Int64 a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(8);
 	UInt64 Converted = HostToNetwork8(&a_Value);
@@ -591,7 +599,7 @@ bool cByteBuffer::WriteBEInt64(Int64 a_Value)
 
 bool cByteBuffer::WriteBEFloat(float a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(4);
 	UInt32 Converted = HostToNetwork4(&a_Value);
@@ -604,7 +612,7 @@ bool cByteBuffer::WriteBEFloat(float a_Value)
 
 bool cByteBuffer::WriteBEDouble(double a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(8);
 	UInt64 Converted = HostToNetwork8(&a_Value);
@@ -618,7 +626,7 @@ bool cByteBuffer::WriteBEDouble(double a_Value)
 
 bool cByteBuffer::WriteBool(bool a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	return WriteChar(a_Value ? 1 : 0);
 }
@@ -629,7 +637,7 @@ bool cByteBuffer::WriteBool(bool a_Value)
 
 bool cByteBuffer::WriteVarInt(UInt32 a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	
 	// A 32-bit integer can be encoded by at most 5 bytes:
@@ -650,7 +658,7 @@ bool cByteBuffer::WriteVarInt(UInt32 a_Value)
 
 bool cByteBuffer::WriteVarUTF8String(const AString & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(a_Value.size() + 1);  // This is a lower-bound on the bytes that will be actually written. Fail early.
 	bool res = WriteVarInt((UInt32)(a_Value.size()));
@@ -667,7 +675,7 @@ bool cByteBuffer::WriteVarUTF8String(const AString & a_Value)
 
 bool cByteBuffer::WriteLEInt(int a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	#ifdef IS_LITTLE_ENDIAN
 		return WriteBuf((const char *)&a_Value, 4);
@@ -683,6 +691,7 @@ bool cByteBuffer::WriteLEInt(int a_Value)
 
 bool cByteBuffer::WritePosition(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
+	CHECK_THREAD
 	return WriteBEInt64(((Int64)a_BlockX & 0x3FFFFFF) << 38 | ((Int64)a_BlockY & 0xFFF) << 26 | ((Int64)a_BlockZ & 0x3FFFFFF));
 }
 
@@ -692,7 +701,7 @@ bool cByteBuffer::WritePosition(int a_BlockX, int a_BlockY, int a_BlockZ)
 
 bool cByteBuffer::ReadBuf(void * a_Buffer, size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(a_Count);
 	char * Dst = (char *)a_Buffer;  // So that we can do byte math
@@ -725,7 +734,7 @@ bool cByteBuffer::ReadBuf(void * a_Buffer, size_t a_Count)
 
 bool cByteBuffer::WriteBuf(const void * a_Buffer, size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(a_Count);
 	char * Src = (char *)a_Buffer;  // So that we can do byte math
@@ -755,7 +764,7 @@ bool cByteBuffer::WriteBuf(const void * a_Buffer, size_t a_Count)
 
 bool cByteBuffer::ReadString(AString & a_String, size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(a_Count);
 	a_String.clear();
@@ -790,7 +799,7 @@ bool cByteBuffer::ReadString(AString & a_String, size_t a_Count)
 bool cByteBuffer::ReadUTF16String(AString & a_String, size_t a_NumChars)
 {
 	// Reads 2 * a_NumChars bytes and interprets it as a UTF16 string, converting it into UTF8 string a_String
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	AString RawData;
 	if (!ReadString(RawData, a_NumChars * 2))
@@ -807,7 +816,7 @@ bool cByteBuffer::ReadUTF16String(AString & a_String, size_t a_NumChars)
 
 bool cByteBuffer::SkipRead(size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	if (!CanReadBytes(a_Count))
 	{
@@ -823,7 +832,7 @@ bool cByteBuffer::SkipRead(size_t a_Count)
 
 void cByteBuffer::ReadAll(AString & a_Data)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	ReadString(a_Data, GetReadableSpace());
 }
@@ -834,6 +843,7 @@ void cByteBuffer::ReadAll(AString & a_Data)
 
 bool cByteBuffer::ReadToByteBuffer(cByteBuffer & a_Dst, size_t a_NumBytes)
 {
+	CHECK_THREAD
 	if (!a_Dst.CanWriteBytes(a_NumBytes) || !CanReadBytes(a_NumBytes))
 	{
 		// There's not enough source bytes or space in the dest BB
@@ -858,7 +868,7 @@ bool cByteBuffer::ReadToByteBuffer(cByteBuffer & a_Dst, size_t a_NumBytes)
 
 void cByteBuffer::CommitRead(void)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	m_DataStart = m_ReadPos;
 }
@@ -869,7 +879,7 @@ void cByteBuffer::CommitRead(void)
 
 void cByteBuffer::ResetRead(void)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	m_ReadPos = m_DataStart;
 }
@@ -882,7 +892,7 @@ void cByteBuffer::ReadAgain(AString & a_Out)
 {
 	// Return the data between m_DataStart and m_ReadPos (the data that has been read but not committed)
 	// Used by ProtoProxy to repeat communication twice, once for parsing and the other time for the remote party
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	size_t DataStart = m_DataStart;
 	if (m_ReadPos < m_DataStart)
@@ -902,7 +912,7 @@ void cByteBuffer::ReadAgain(AString & a_Out)
 
 void cByteBuffer::AdvanceReadPos(size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	m_ReadPos += a_Count;
 	if (m_ReadPos >= m_BufferSize)
diff --git a/src/ByteBuffer.h b/src/ByteBuffer.h
index 70de419f0..2a316fa32 100644
--- a/src/ByteBuffer.h
+++ b/src/ByteBuffer.h
@@ -130,13 +130,15 @@ protected:
 	char * m_Buffer;
 	size_t m_BufferSize;  // Total size of the ringbuffer
 	
-	#ifdef _DEBUG
-	volatile unsigned long m_ThreadID;  // Thread that is currently accessing the object, checked via cSingleThreadAccessChecker
-	#endif  // _DEBUG
-	
 	size_t m_DataStart;  // Where the data starts in the ringbuffer
 	size_t m_WritePos;   // Where the data ends in the ringbuffer
 	size_t m_ReadPos;    // Where the next read will start in the ringbuffer
+
+	#ifdef _DEBUG
+		/** The ID of the thread currently accessing the object.
+		Used for checking that only one thread accesses the object at a time, via cSingleThreadAccessChecker. */
+		mutable std::thread::id m_ThreadID;
+	#endif
 	
 	/** Advances the m_ReadPos by a_Count bytes */
 	void AdvanceReadPos(size_t a_Count);
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d6218ff42..997326cc7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -113,7 +113,6 @@ SET (HDRS
 	Map.h
 	MapManager.h
 	Matrix4.h
-	MersenneTwister.h
 	MobCensus.h
 	MobFamilyCollecter.h
 	MobProximityCounter.h
diff --git a/src/CheckBasicStyle.lua b/src/CheckBasicStyle.lua
index 7914aedfd..0c7b05d6d 100644
--- a/src/CheckBasicStyle.lua
+++ b/src/CheckBasicStyle.lua
@@ -135,11 +135,11 @@ local g_ViolationPatterns =
 	
 	-- Space after keywords:
 	{"[^_]if%(", "Needs a space after \"if\""},
-	{"for%(", "Needs a space after \"for\""},
-	{"while%(", "Needs a space after \"while\""},
-	{"switch%(", "Needs a space after \"switch\""},
-	{"catch%(", "Needs a space after \"catch\""},
-	{"template<", "Needs a space after \"template\""},
+	{"%sfor%(", "Needs a space after \"for\""},
+	{"%swhile%(", "Needs a space after \"while\""},
+	{"%sswitch%(", "Needs a space after \"switch\""},
+	{"%scatch%(", "Needs a space after \"catch\""},
+	{"%stemplate<", "Needs a space after \"template\""},
 	
 	-- No space after keyword's parenthesis:
 	{"[^%a#]if %( ", "Remove the space after \"(\""},
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index d271b4cb4..017ceda26 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -28,7 +28,6 @@
 #include "Item.h"
 #include "Noise/Noise.h"
 #include "Root.h"
-#include "MersenneTwister.h"
 #include "Entities/Player.h"
 #include "BlockArea.h"
 #include "Bindings/PluginManager.h"
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index 366f20170..d246f6da2 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -16,7 +16,6 @@
 #include "Mobs/Monster.h"
 #include "ChatColor.h"
 #include "OSSupport/Socket.h"
-#include "OSSupport/Timer.h"
 #include "Items/ItemHandler.h"
 #include "Blocks/BlockHandler.h"
 #include "Blocks/BlockSlab.h"
@@ -25,8 +24,6 @@
 #include "Root.h"
 
 #include "Protocol/Authenticator.h"
-#include "MersenneTwister.h"
-
 #include "Protocol/ProtocolRecognizer.h"
 #include "CompositeChat.h"
 #include "Items/ItemSword.h"
@@ -45,16 +42,6 @@
 
 
 
-#define RECI_RAND_MAX (1.f/RAND_MAX)
-inline int fRadRand(MTRand & r1, int a_BlockCoord)
-{
-	return a_BlockCoord * 32 + (int)(16 * ((float)r1.rand() * RECI_RAND_MAX) * 16 - 8);
-}
-
-
-
-
-
 int cClientHandle::s_ClientCount = 0;
 
 
@@ -76,8 +63,6 @@ cClientHandle::cClientHandle(const cSocket * a_Socket, int a_ViewDistance) :
 	m_TimeSinceLastPacket(0),
 	m_Ping(1000),
 	m_PingID(1),
-	m_PingStartTime(0),
-	m_LastPingTime(1000),
 	m_BlockDigAnimStage(-1),
 	m_BlockDigAnimSpeed(0),
 	m_BlockDigAnimX(0),
@@ -101,9 +86,7 @@ cClientHandle::cClientHandle(const cSocket * a_Socket, int a_ViewDistance) :
 	
 	s_ClientCount++;  // Not protected by CS because clients are always constructed from the same thread
 	m_UniqueID = s_ClientCount;
-
-	cTimer t1;
-	m_LastPingTime = t1.GetNowTime();
+	m_LastPingTime = std::chrono::steady_clock::now();
 
 	LOGD("New ClientHandle created at %p", this);
 }
@@ -401,8 +384,7 @@ void cClientHandle::Authenticate(const AString & a_Name, const AString & a_UUID,
 
 	// Delay the first ping until the client "settles down"
 	// This should fix #889, "BadCast exception, cannot convert bit to fm" error in client
-	cTimer t1;
-	m_LastPingTime = t1.GetNowTime() + 3000;  // Send the first KeepAlive packet in 3 seconds
+	m_LastPingTime = std::chrono::steady_clock::now() + std::chrono::seconds(3);  // Send the first KeepAlive packet in 3 seconds
 
 	cRoot::Get()->GetPluginManager()->CallHookPlayerSpawned(*m_Player);
 }
@@ -1783,8 +1765,7 @@ void cClientHandle::HandleKeepAlive(int a_KeepAliveID)
 {
 	if (a_KeepAliveID == m_PingID)
 	{
-		cTimer t1;
-		m_Ping = (short)((t1.GetNowTime() - m_PingStartTime) / 2);
+		m_Ping = std::chrono::steady_clock::now() - m_PingStartTime;
 	}
 }
 
@@ -2009,11 +1990,10 @@ void cClientHandle::Tick(float a_Dt)
 	// Send a ping packet:
 	if (m_State == csPlaying)
 	{
-		cTimer t1;
-		if ((m_LastPingTime + cClientHandle::PING_TIME_MS <= t1.GetNowTime()))
+		if ((m_LastPingTime + cClientHandle::PING_TIME_MS <= std::chrono::steady_clock::now()))
 		{
 			m_PingID++;
-			m_PingStartTime = t1.GetNowTime();
+			m_PingStartTime = std::chrono::steady_clock::now();
 			m_Protocol->SendKeepAlive(m_PingID);
 			m_LastPingTime = m_PingStartTime;
 		}
diff --git a/src/ClientHandle.h b/src/ClientHandle.h
index f195b6be7..3431e3a71 100644
--- a/src/ClientHandle.h
+++ b/src/ClientHandle.h
@@ -215,7 +215,7 @@ public:
 	const AString & GetUsername(void) const;
 	void SetUsername( const AString & a_Username);
 	
-	inline short GetPing(void) const { return m_Ping; }
+	inline short GetPing(void) const { return static_cast<short>(std::chrono::duration_cast<std::chrono::milliseconds>(m_Ping).count()); }
 	
 	/** Sets the maximal view distance. */
 	void SetViewDistance(int a_ViewDistance);
@@ -378,11 +378,11 @@ private:
 	/** Seconds since the last packet data was received (updated in Tick(), reset in DataReceived()) */
 	float m_TimeSinceLastPacket;
 	
-	short m_Ping;
+	std::chrono::steady_clock::duration m_Ping;
 	int   m_PingID;
-	long long m_PingStartTime;
-	long long m_LastPingTime;
-	static const unsigned short PING_TIME_MS = 1000;  // Vanilla sends 1 per 20 ticks (1 second or every 1000 ms)
+	std::chrono::steady_clock::time_point m_PingStartTime;
+	std::chrono::steady_clock::time_point m_LastPingTime;
+	std::chrono::milliseconds PING_TIME_MS = std::chrono::milliseconds(1000);  // Vanilla sends 1 per 20 ticks (1 second or every 1000 ms)
 	
 	// Values required for block dig animation
 	int m_BlockDigAnimStage;  // Current stage of the animation; -1 if not digging
diff --git a/src/DeadlockDetect.cpp b/src/DeadlockDetect.cpp
index 7f703416c..3bb897221 100644
--- a/src/DeadlockDetect.cpp
+++ b/src/DeadlockDetect.cpp
@@ -13,7 +13,7 @@
 
 
 
-/// Number of milliseconds per cycle
+/** Number of milliseconds per cycle */
 const int CYCLE_MILLISECONDS = 100;
 
 
@@ -87,7 +87,7 @@ void cDeadlockDetect::Execute(void)
 		} Checker(this);
 		cRoot::Get()->ForEachWorld(Checker);
 		
-		cSleep::MilliSleep(CYCLE_MILLISECONDS);
+		std::this_thread::sleep_for(std::chrono::milliseconds(CYCLE_MILLISECONDS));
 	}  // while (should run)
 }
 
@@ -119,7 +119,7 @@ void cDeadlockDetect::CheckWorldAge(const AString & a_WorldName, Int64 a_Age)
 	if (WorldAge.m_Age == a_Age)
 	{
 		WorldAge.m_NumCyclesSame += 1;
-		if (WorldAge.m_NumCyclesSame > (1000 * m_IntervalSec) / CYCLE_MILLISECONDS)
+		if (WorldAge.m_NumCyclesSame > (m_IntervalSec * 1000) / CYCLE_MILLISECONDS)
 		{
 			DeadlockDetected();
 		}
diff --git a/src/DeadlockDetect.h b/src/DeadlockDetect.h
index 6aa98acbb..57027e923 100644
--- a/src/DeadlockDetect.h
+++ b/src/DeadlockDetect.h
@@ -28,7 +28,7 @@ class cDeadlockDetect :
 public:
 	cDeadlockDetect(void);
 	
-	/// Starts the detection. Hides cIsThread's Start, because we need some initialization
+	/** Starts the detection. Hides cIsThread's Start, because we need some initialization */
 	bool Start(int a_IntervalSec);
 	
 protected:
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index bafd06277..8d2eb1e5f 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -11,7 +11,6 @@
 #include "../BlockEntities/BlockEntity.h"
 #include "../BlockEntities/EnderChestEntity.h"
 #include "../Root.h"
-#include "../OSSupport/Timer.h"
 #include "../Chunk.h"
 #include "../Items/ItemHandler.h"
 #include "../Vector3.h"
@@ -27,7 +26,7 @@
 #define PLAYER_INVENTORY_SAVE_INTERVAL 6000
 
 // 1000 = once per second
-#define PLAYER_LIST_TIME_MS 1000
+#define PLAYER_LIST_TIME_MS std::chrono::milliseconds(1000)
 
 
 
@@ -91,9 +90,7 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 	SetMaxHealth(MAX_HEALTH);
 	m_Health = MAX_HEALTH;
 	
-	cTimer t1;
-	m_LastPlayerListTime = t1.GetNowTime();
-	
+	m_LastPlayerListTime = std::chrono::steady_clock::now();
 	m_PlayerName = a_PlayerName;
 
 	cWorld * World = nullptr;
@@ -268,11 +265,10 @@ void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 	m_Inventory.UpdateItems();
 
 	// Send Player List (Once per m_LastPlayerListTime/1000 ms)
-	cTimer t1;
-	if (m_LastPlayerListTime + PLAYER_LIST_TIME_MS <= t1.GetNowTime())
+	if (m_LastPlayerListTime + PLAYER_LIST_TIME_MS <= std::chrono::steady_clock::now())
 	{
 		m_World->BroadcastPlayerListUpdatePing(*this);
-		m_LastPlayerListTime = t1.GetNowTime();
+		m_LastPlayerListTime = std::chrono::steady_clock::now();
 	}
 
 	if (IsFlying())
@@ -363,7 +359,7 @@ float cPlayer::GetXpPercentage()
 
 bool cPlayer::SetCurrentExperience(short int a_CurrentXp)
 {
-	if (!(a_CurrentXp >= 0) || (a_CurrentXp > (SHRT_MAX - m_LifetimeTotalXp)))
+	if (!(a_CurrentXp >= 0) || (a_CurrentXp > (std::numeric_limits<short>().max() - m_LifetimeTotalXp)))
 	{
 		LOGWARNING("Tried to update experiece with an invalid Xp value: %d", a_CurrentXp);
 		return false;  // oops, they gave us a dodgey number
@@ -383,18 +379,17 @@ bool cPlayer::SetCurrentExperience(short int a_CurrentXp)
 
 short cPlayer::DeltaExperience(short a_Xp_delta)
 {
-	if (a_Xp_delta > (SHRT_MAX - m_CurrentXp))
+	if (a_Xp_delta > (std::numeric_limits<short>().max() - m_CurrentXp))
 	{
 		// Value was bad, abort and report
-		LOGWARNING("Attempt was made to increment Xp by %d, which overflowed the short datatype. Ignoring.",
-			a_Xp_delta);
+		LOGWARNING("Attempt was made to increment Xp by %d, which overflowed the short datatype. Ignoring.", a_Xp_delta);
 		return -1;  // Should we instead just return the current Xp?
 	}
 
 	m_CurrentXp += a_Xp_delta;
 
 	// Make sure they didn't subtract too much
-	m_CurrentXp = std::max<short int>(m_CurrentXp, 0);
+	m_CurrentXp = std::max<short>(m_CurrentXp, 0);
 
 	// Update total for score calculation
 	if (a_Xp_delta > 0)
@@ -402,8 +397,7 @@ short cPlayer::DeltaExperience(short a_Xp_delta)
 		m_LifetimeTotalXp += a_Xp_delta;
 	}
 
-	LOGD("Player \"%s\" gained/lost %d experience, total is now: %d",
-		GetName().c_str(), a_Xp_delta, m_CurrentXp);
+	LOGD("Player \"%s\" gained/lost %d experience, total is now: %d", GetName().c_str(), a_Xp_delta, m_CurrentXp);
 
 	// Set experience to be updated
 	m_bDirtyExperience = true;
diff --git a/src/Entities/Player.h b/src/Entities/Player.h
index 4bb51b556..c643aaa8e 100644
--- a/src/Entities/Player.h
+++ b/src/Entities/Player.h
@@ -516,7 +516,7 @@ protected:
 	/** The item being dragged by the cursor while in a UI window */
 	cItem m_DraggingItem;
 
-	long long m_LastPlayerListTime;
+	std::chrono::steady_clock::time_point m_LastPlayerListTime;
 
 	cClientHandle * m_ClientHandle;
 	
diff --git a/src/FastRandom.cpp b/src/FastRandom.cpp
index 42bf5f3f9..cfafc7486 100644
--- a/src/FastRandom.cpp
+++ b/src/FastRandom.cpp
@@ -4,13 +4,15 @@
 // Implements the cFastRandom class representing a fast random number generator
 
 #include "Globals.h"
-#include <time.h>
 #include "FastRandom.h"
 
 
 
 
 
+////////////////////////////////////////////////////////////////////////////////
+// cFastRandom:
+
 #if 0 && defined(_DEBUG)
 // Self-test
 // Both ints and floats are quick-tested to see if the random is calculated correctly, checking the range in ASSERTs,
@@ -83,16 +85,8 @@ public:
 
 
 
-
-int cFastRandom::m_SeedCounter = 0;
-
-
-
-
-
 cFastRandom::cFastRandom(void) :
-	m_Seed(m_SeedCounter++),
-	m_Counter(0)
+	m_LinearRand(static_cast<unsigned>(std::chrono::system_clock::now().time_since_epoch().count()))
 {
 }
 
@@ -102,82 +96,96 @@ cFastRandom::cFastRandom(void) :
 
 int cFastRandom::NextInt(int a_Range)
 {
-	ASSERT(a_Range <= 1000000);  // The random is not sufficiently linearly distributed with bigger ranges
-	ASSERT(a_Range > 0);
-	
-	// Make the m_Counter operations as minimal as possible, to emulate atomicity
-	int Counter = m_Counter++;
-	
-	// Use a_Range, m_Counter and m_Seed as inputs to the pseudorandom function:
-	int n = a_Range + Counter * 57 + m_Seed * 57 * 57;
-	n = (n << 13) ^ n;
-	n = ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff);
-	return ((n / 11) % a_Range);
+	m_IntDistribution = std::uniform_int_distribution<>(0, a_Range - 1);
+	return m_IntDistribution(m_LinearRand);
 }
 
 
 
 
 
+
 int cFastRandom::NextInt(int a_Range, int a_Salt)
 {
-	ASSERT(a_Range <= 1000000);  // The random is not sufficiently linearly distributed with bigger ranges
-	ASSERT(a_Range > 0);
-	
-	// Make the m_Counter operations as minimal as possible, to emulate atomicity
-	int Counter = m_Counter++;
-	
-	// Use a_Range, a_Salt, m_Counter and m_Seed as inputs to the pseudorandom function:
-	int n = a_Range + Counter * 57 + m_Seed * 57 * 57 + a_Salt * 57 * 57 * 57;
-	n = (n << 13) ^ n;
-	n = ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff);
-	return ((n / 11) % a_Range);
+	m_LinearRand.seed(a_Salt);
+	m_IntDistribution = std::uniform_int_distribution<>(0, a_Range - 1);
+	return m_IntDistribution(m_LinearRand);
 }
 
 
 
 
 
+
 float cFastRandom::NextFloat(float a_Range)
 {
-	// Make the m_Counter operations as minimal as possible, to emulate atomicity
-	int Counter = m_Counter++;
-	
-	// Use a_Range, a_Salt, m_Counter and m_Seed as inputs to the pseudorandom function:
-	int n = (int)a_Range + Counter * 57 + m_Seed * 57 * 57;
-	n = (n << 13) ^ n;
-	n = ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff);
-	
-	// Convert the integer into float with the specified range:
-	return (((float)n / (float)0x7fffffff) * a_Range);
+	m_FloatDistribution = std::uniform_real_distribution<float>(0, a_Range - 1);
+	return m_FloatDistribution(m_LinearRand);
 }
 
 
 
 
 
+
 float cFastRandom::NextFloat(float a_Range, int a_Salt)
 {
-	// Make the m_Counter operations as minimal as possible, to emulate atomicity
-	int Counter = m_Counter++;
-	
-	// Use a_Range, a_Salt, m_Counter and m_Seed as inputs to the pseudorandom function:
-	int n = (int)a_Range + Counter * 57 + m_Seed * 57 * 57 + a_Salt * 57 * 57 * 57;
-	n = (n << 13) ^ n;
-	n = ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff);
-	
-	// Convert the integer into float with the specified range:
-	return (((float)n / (float)0x7fffffff) * a_Range);
+	m_LinearRand.seed(a_Salt);
+	m_FloatDistribution = std::uniform_real_distribution<float>(0, a_Range - 1);
+	return m_FloatDistribution(m_LinearRand);
 }
 
 
 
 
 
+
 int cFastRandom::GenerateRandomInteger(int a_Begin, int a_End)
 {
-	cFastRandom Random;
-	return Random.NextInt(a_End - a_Begin + 1) + a_Begin;
+	m_IntDistribution = std::uniform_int_distribution<>(a_Begin, a_End - 1);
+	return m_IntDistribution(m_LinearRand);
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// MTRand:
+
+MTRand::MTRand() :
+	m_MersenneRand(static_cast<unsigned>(std::chrono::system_clock::now().time_since_epoch().count()))
+{
+}
+
+
+
+
+
+int MTRand::randInt(int a_Range)
+{
+	m_IntDistribution = std::uniform_int_distribution<>(0, a_Range);
+	return m_IntDistribution(m_MersenneRand);
+}
+
+
+
+
+
+int MTRand::randInt()
+{
+	m_IntDistribution = std::uniform_int_distribution<>(0, std::numeric_limits<int>::max());
+	return m_IntDistribution(m_MersenneRand);
+}
+
+
+
+
+
+double MTRand::rand(double a_Range)
+{
+	m_DoubleDistribution = std::uniform_real_distribution<>(0, a_Range);
+	return m_DoubleDistribution(m_MersenneRand);
 }
 
 
diff --git a/src/FastRandom.h b/src/FastRandom.h
index cebebad96..7eecc698a 100644
--- a/src/FastRandom.h
+++ b/src/FastRandom.h
@@ -22,6 +22,7 @@ salts, the values they get will be different.
 
 
 #pragma once
+#include <random>
 
 
 
@@ -30,6 +31,7 @@ salts, the values they get will be different.
 class cFastRandom
 {
 public:
+
 	cFastRandom(void);
 	
 	/// Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M
@@ -49,15 +51,33 @@ public:
 
 	/** Returns a random int in the range [a_Begin .. a_End] */
 	int GenerateRandomInteger(int a_Begin, int a_End);
-	
-protected:
-	int m_Seed;
-	int m_Counter;
-	
-	/// Counter that is used to initialize the seed, incremented for each object created
-	static int m_SeedCounter;
-} ;
 
+private:
+
+	std::minstd_rand m_LinearRand;
+	std::uniform_int_distribution<> m_IntDistribution;
+	std::uniform_real_distribution<float> m_FloatDistribution;
+};
+
+
+
+
+
+class MTRand
+{
+public:
+
+	MTRand(void);
+
+	int randInt(int a_Range);
+
+	int randInt(void);
 
+	double rand(double a_Range);
 
+private:
 
+	std::mt19937 m_MersenneRand;
+	std::uniform_int_distribution<> m_IntDistribution;
+	std::uniform_real_distribution<> m_DoubleDistribution;
+};
diff --git a/src/Generating/ChunkGenerator.cpp b/src/Generating/ChunkGenerator.cpp
index 3ee02c767..d2e7b47b4 100644
--- a/src/Generating/ChunkGenerator.cpp
+++ b/src/Generating/ChunkGenerator.cpp
@@ -6,7 +6,7 @@
 #include "ChunkDesc.h"
 #include "ComposableGenerator.h"
 #include "Noise3DGenerator.h"
-#include "../MersenneTwister.h"
+#include "FastRandom.h"
 
 
 
diff --git a/src/Generating/Noise3DGenerator.cpp b/src/Generating/Noise3DGenerator.cpp
index 5ed97a945..b43a1a6de 100644
--- a/src/Generating/Noise3DGenerator.cpp
+++ b/src/Generating/Noise3DGenerator.cpp
@@ -6,7 +6,6 @@
 #include "Globals.h"
 #include "Noise3DGenerator.h"
 #include "../OSSupport/File.h"
-#include "../OSSupport/Timer.h"
 #include "../IniFile.h"
 #include "../LinearInterpolation.h"
 #include "../LinearUpscale.h"
diff --git a/src/Globals.h b/src/Globals.h
index d75ae0093..b68e9fd68 100644
--- a/src/Globals.h
+++ b/src/Globals.h
@@ -184,9 +184,9 @@ template class SizeChecker<UInt16, 2>;
 
 // OS-dependent stuff:
 #ifdef _WIN32
-	#define WIN32_LEAN_AND_MEAN
 
-	#define _WIN32_WINNT 0x501  // We want to target WinXP and higher
+	#define WIN32_LEAN_AND_MEAN
+	#define _WIN32_WINNT _WIN32_WINNT_WS03  // We want to target Windows XP with Service Pack 2 & Windows Server 2003 with Service Pack 1 and higher
 
 	#include <Windows.h>
 	#include <winsock2.h>
@@ -241,6 +241,7 @@ template class SizeChecker<UInt16, 2>;
 
 
 // STL stuff:
+#include <chrono>
 #include <vector>
 #include <list>
 #include <deque>
@@ -257,11 +258,9 @@ template class SizeChecker<UInt16, 2>;
 #ifndef TEST_GLOBALS
 	// Common headers (part 1, without macros):
 	#include "StringUtils.h"
-	#include "OSSupport/Sleep.h"
 	#include "OSSupport/CriticalSection.h"
 	#include "OSSupport/Semaphore.h"
 	#include "OSSupport/Event.h"
-	#include "OSSupport/Thread.h"
 	#include "OSSupport/File.h"
 	#include "Logger.h"
 	#include "OSSupport/StackTrace.h"
diff --git a/src/Logger.cpp b/src/Logger.cpp
index cb528e8ab..c4adf4b48 100644
--- a/src/Logger.cpp
+++ b/src/Logger.cpp
@@ -45,7 +45,7 @@ void cLogger::LogSimple(AString a_Message, eLogLevel a_LogLevel)
 
 	AString Line;
 	#ifdef _DEBUG
-		Printf(Line, "[%04lx|%02d:%02d:%02d] %s\n", cIsThread::GetCurrentID(), timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec, a_Message.c_str());
+		Printf(Line, "[%04lx|%02d:%02d:%02d] %s\n", std::hash<std::thread::id>()(std::this_thread::get_id()), timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec, a_Message.c_str());
 	#else
 		Printf(Line, "[%02d:%02d:%02d] %s\n", timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec, a_Message.c_str());
 	#endif
diff --git a/src/MersenneTwister.h b/src/MersenneTwister.h
deleted file mode 100644
index e83a470e2..000000000
--- a/src/MersenneTwister.h
+++ /dev/null
@@ -1,456 +0,0 @@
-// MersenneTwister.h
-// Mersenne Twister random number generator -- a C++ class MTRand
-// Based on code by Makoto Matsumoto, Takuji Nishimura, and Shawn Cokus
-// Richard J. Wagner  v1.1  28 September 2009  wagnerr@umich.edu
-
-// The Mersenne Twister is an algorithm for generating random numbers.  It
-// was designed with consideration of the flaws in various other generators.
-// The period, 2^19937-1, and the order of equidistribution, 623 dimensions,
-// are far greater.  The generator is also fast; it avoids multiplication and
-// division, and it benefits from caches and pipelines.  For more information
-// see the inventors' web page at
-// http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
-
-// Reference
-// M. Matsumoto and T. Nishimura, "Mersenne Twister: A 623-Dimensionally
-// Equidistributed Uniform Pseudo-Random Number Generator", ACM Transactions on
-// Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3-30.
-
-// Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
-// Copyright (C) 2000 - 2009, Richard J. Wagner
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-//
-//   1. Redistributions of source code must retain the above copyright
-//      notice, this list of conditions and the following disclaimer.
-//
-//   2. Redistributions in binary form must reproduce the above copyright
-//      notice, this list of conditions and the following disclaimer in the
-//      documentation and/or other materials provided with the distribution.
-//
-//   3. The names of its contributors may not be used to endorse or promote
-//      products derived from this software without specific prior written
-//      permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-// ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-// POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef MERSENNETWISTER_H
-#define MERSENNETWISTER_H
-
-// Not thread safe (unless auto-initialization is avoided and each thread has
-// its own MTRand object)
-
-#include <iostream>
-#include <climits>
-#include <cstdio>
-#include <ctime>
-#include <cmath>
-
-class MTRand {
-// Data
-public:
-	typedef UInt32 uint32;  // unsigned integer type, at least 32 bits
-
-	enum { N = 624 };       // length of state vector
-	enum { SAVE = N + 1 };  // length of array for save()
-
-protected:
-	enum { M = 397 };  // period parameter
-
-	uint32 state[N];   // internal state
-	uint32 *pNext;     // next value to get from state
-	uint32 left;       // number of values left before reload needed
-
-// Methods
-public:
-	MTRand( const uint32 oneSeed );  // initialize with a simple uint32
-	MTRand( uint32 *const bigSeed, uint32 const seedLength = N );  // or array
-	MTRand();  // auto-initialize with /dev/urandom or time() and clock()
-	MTRand( const MTRand& o );  // copy
-
-	// Do NOT use for CRYPTOGRAPHY without securely hashing several returned
-	// values together, otherwise the generator state can be learned after
-	// reading 624 consecutive values.
-
-	// Access to 32-bit random numbers
-	uint32 randInt();                     // integer in [0,2^32-1]
-	uint32 randInt( const uint32 n );     // integer in [0,n] for n < 2^32
-	double rand();                        // real number in [0,1]
-	double rand( const double n );        // real number in [0,n]
-	double randExc();                     // real number in [0,1)
-	double randExc( const double n );     // real number in [0,n)
-	double randDblExc();                  // real number in (0,1)
-	double randDblExc( const double n );  // real number in (0,n)
-	double operator()();                  // same as rand()
-
-	// Access to 53-bit random numbers (capacity of IEEE double precision)
-	double rand53();  // real number in [0,1)
-
-	// Access to nonuniform random number distributions
-	double randNorm( const double mean = 0.0, const double stddev = 1.0 );
-
-	// Re-seeding functions with same behavior as initializers
-	void seed( const uint32 oneSeed );
-	void seed( uint32 *const bigSeed, const uint32 seedLength = N );
-	void seed();
-
-	// Saving and loading generator state
-	void save( uint32* saveArray ) const;  // to array of size SAVE
-	void load( uint32 *const loadArray );  // from such array
-	friend std::ostream& operator<<( std::ostream& os, const MTRand& mtrand );
-	friend std::istream& operator>>( std::istream& is, MTRand& mtrand );
-	MTRand& operator=( const MTRand& o );
-
-protected:
-	void initialize( const uint32 oneSeed );
-	void reload();
-	uint32 hiBit( const uint32 u ) const { return u & 0x80000000UL; }
-	uint32 loBit( const uint32 u ) const { return u & 0x00000001UL; }
-	uint32 loBits( const uint32 u ) const { return u & 0x7fffffffUL; }
-	uint32 mixBits( const uint32 u, const uint32 v ) const
-		{ return hiBit(u) | loBits(v); }
-	uint32 magic( const uint32 u ) const
-		{ return loBit(u) ? 0x9908b0dfUL : 0x0UL; }
-	uint32 twist( const uint32 m, const uint32 s0, const uint32 s1 ) const
-		{ return m ^ (mixBits(s0,s1)>>1) ^ magic(s1); }
-	static uint32 hash( time_t t, clock_t c );
-};
-
-// Functions are defined in order of usage to assist inlining
-
-inline MTRand::uint32 MTRand::hash( time_t t, clock_t c )
-{
-	// Get a uint32 from t and c
-	// Better than uint32(x) in case x is floating point in [0,1]
-	// Based on code by Lawrence Kirby (fred@genesis.demon.co.uk)
-
-	static uint32 differ = 0;  // guarantee time-based seeds will change
-
-	uint32 h1 = 0;
-	unsigned char *p = (unsigned char *) &t;
-	for( size_t i = 0; i < sizeof(t); ++i )
-	{
-		h1 *= UCHAR_MAX + 2U;
-		h1 += p[i];
-	}
-	uint32 h2 = 0;
-	p = (unsigned char *) &c;
-	for( size_t j = 0; j < sizeof(c); ++j )
-	{
-		h2 *= UCHAR_MAX + 2U;
-		h2 += p[j];
-	}
-	return ( h1 + differ++ ) ^ h2;
-}
-
-inline void MTRand::initialize( const uint32 seed )
-{
-	// Initialize generator state with seed
-	// See Knuth TAOCP Vol 2, 3rd Ed, p.106 for multiplier.
-	// In previous versions, most significant bits (MSBs) of the seed affect
-	// only MSBs of the state array.  Modified 9 Jan 2002 by Makoto Matsumoto.
-	uint32 *s = state;
-	uint32 *r = state;
-	uint32 i = 1;
-	*s++ = seed & 0xffffffffUL;
-	for( ; i < N; ++i )
-	{
-		*s++ = ( 1812433253UL * ( *r ^ (*r >> 30) ) + i ) & 0xffffffffUL;
-		r++;
-	}
-}
-
-inline void MTRand::reload()
-{
-	// Generate N new values in state
-	// Made clearer and faster by Matthew Bellew (matthew.bellew@home.com)
-	static const int MmN = int(M) - int(N);  // in case enums are unsigned
-	uint32 *p = state;
-	int i;
-	for( i = N - M; i--; ++p )
-		*p = twist( p[M], p[0], p[1] );
-	for( i = M; --i; ++p )
-		*p = twist( p[MmN], p[0], p[1] );
-	*p = twist( p[MmN], p[0], state[0] );
-
-	left = N, pNext = state;
-}
-
-inline void MTRand::seed( const uint32 oneSeed )
-{
-	// Seed the generator with a simple uint32
-	initialize(oneSeed);
-	reload();
-}
-
-inline void MTRand::seed( uint32 *const bigSeed, const uint32 seedLength )
-{
-	// Seed the generator with an array of uint32's
-	// There are 2^19937-1 possible initial states.  This function allows
-	// all of those to be accessed by providing at least 19937 bits (with a
-	// default seed length of N = 624 uint32's).  Any bits above the lower 32
-	// in each element are discarded.
-	// Just call seed() if you want to get array from /dev/urandom
-	initialize(19650218UL);
-	uint32 i = 1;
-	uint32 j = 0;
-	uint32 k = ( static_cast<uint32>(N) > seedLength ? static_cast<uint32>(N) : seedLength );
-	for( ; k; --k )
-	{
-		state[i] =
-		state[i] ^ ( (state[i-1] ^ (state[i-1] >> 30)) * 1664525UL );
-		state[i] += ( bigSeed[j] & 0xffffffffUL ) + j;
-		state[i] &= 0xffffffffUL;
-		++i;  ++j;
-		if( i >= N ) { state[0] = state[N-1];  i = 1; }
-		if( j >= seedLength ) j = 0;
-	}
-	for( k = N - 1; k; --k )
-	{
-		state[i] =
-		state[i] ^ ( (state[i-1] ^ (state[i-1] >> 30)) * 1566083941UL );
-		state[i] -= i;
-		state[i] &= 0xffffffffUL;
-		++i;
-		if( i >= N ) { state[0] = state[N-1];  i = 1; }
-	}
-	state[0] = 0x80000000UL;  // MSB is 1, assuring non-zero initial array
-	reload();
-}
-
-inline void MTRand::seed()
-{
-	// Seed the generator with an array from /dev/urandom if available
-	// Otherwise use a hash of time() and clock() values
-
-	// First try getting an array from /dev/urandom
-
-	/* // Commented out by FakeTruth because doing this 200 times a tick is SUUUUPEERRR SLOW!!~~!\D5Ne
-	FILE* urandom = fopen( "/dev/urandom", "rb" );
-	if( urandom )
-	{
-		uint32 bigSeed[N];
-		register uint32 *s = bigSeed;
-		register int i = N;
-		register bool success = true;
-		while( success && i-- )
-			success = fread( s++, sizeof(uint32), 1, urandom );
-		fclose(urandom);
-		if( success ) { seed( bigSeed, N );  return; }
-	}
-	*/
-
-	// Was not successful, so use time() and clock() instead
-	seed( hash( time(NULL), clock() ) );
-}
-
-inline MTRand::MTRand( const uint32 oneSeed )
-	{ seed(oneSeed); }
-
-inline MTRand::MTRand( uint32 *const bigSeed, const uint32 seedLength )
-	{ seed(bigSeed,seedLength); }
-
-inline MTRand::MTRand()
-	{ seed(); }
-
-inline MTRand::MTRand( const MTRand& o )
-{
-	const uint32 *t = o.state;
-	uint32 *s = state;
-	int i = N;
-	for( ; i--; *s++ = *t++ ) {}
-	left = o.left;
-	pNext = &state[N-left];
-}
-
-inline MTRand::uint32 MTRand::randInt()
-{
-	// Pull a 32-bit integer from the generator state
-	// Every other access function simply transforms the numbers extracted here
-
-	if( left == 0 ) reload();
-	--left;
-
-	uint32 s1;
-	s1 = *pNext++;
-	s1 ^= (s1 >> 11);
-	s1 ^= (s1 <<  7) & 0x9d2c5680UL;
-	s1 ^= (s1 << 15) & 0xefc60000UL;
-	return ( s1 ^ (s1 >> 18) );
-}
-
-inline MTRand::uint32 MTRand::randInt( const uint32 n )
-{
-	// Find which bits are used in n
-	// Optimized by Magnus Jonsson (magnus@smartelectronix.com)
-	uint32 used = n;
-	used |= used >> 1;
-	used |= used >> 2;
-	used |= used >> 4;
-	used |= used >> 8;
-	used |= used >> 16;
-
-	// Draw numbers until one is found in [0,n]
-	uint32 i;
-	do
-		i = randInt() & used;  // toss unused bits to shorten search
-	while( i > n );
-	return i;
-}
-
-inline double MTRand::rand()
-	{ return double(randInt()) * (1.0/4294967295.0); }
-
-inline double MTRand::rand( const double n )
-	{ return rand() * n; }
-
-inline double MTRand::randExc()
-	{ return double(randInt()) * (1.0/4294967296.0); }
-
-inline double MTRand::randExc( const double n )
-	{ return randExc() * n; }
-
-inline double MTRand::randDblExc()
-	{ return ( double(randInt()) + 0.5 ) * (1.0/4294967296.0); }
-
-inline double MTRand::randDblExc( const double n )
-	{ return randDblExc() * n; }
-
-inline double MTRand::rand53()
-{
-	uint32 a = randInt() >> 5, b = randInt() >> 6;
-	return ( a * 67108864.0 + b ) * (1.0/9007199254740992.0);  // by Isaku Wada
-}
-
-inline double MTRand::randNorm( const double mean, const double stddev )
-{
-	// Return a real number from a normal (Gaussian) distribution with given
-	// mean and standard deviation by polar form of Box-Muller transformation
-	double x, y, r;
-	do
-	{
-		x = 2.0 * rand() - 1.0;
-		y = 2.0 * rand() - 1.0;
-		r = x * x + y * y;
-	}
-	while ( r >= 1.0 || r == 0.0 );
-	double s = sqrt( -2.0 * log(r) / r );
-	return mean + x * s * stddev;
-}
-
-inline double MTRand::operator()()
-{
-	return rand();
-}
-
-inline void MTRand::save( uint32* saveArray ) const
-{
-	const uint32 *s = state;
-	uint32 *sa = saveArray;
-	int i = N;
-	for( ; i--; *sa++ = *s++ ) {}
-	*sa = left;
-}
-
-inline void MTRand::load( uint32 *const loadArray )
-{
-	uint32 *s = state;
-	uint32 *la = loadArray;
-	int i = N;
-	for( ; i--; *s++ = *la++ ) {}
-	left = *la;
-	pNext = &state[N-left];
-}
-
-inline std::ostream& operator<<( std::ostream& os, const MTRand& mtrand )
-{
-	const MTRand::uint32 *s = mtrand.state;
-	int i = mtrand.N;
-	for( ; i--; os << *s++ << "\t" ) {}
-	return os << mtrand.left;
-}
-
-inline std::istream& operator>>( std::istream& is, MTRand& mtrand )
-{
-	MTRand::uint32 *s = mtrand.state;
-	int i = mtrand.N;
-	for( ; i--; is >> *s++ ) {}
-	is >> mtrand.left;
-	mtrand.pNext = &mtrand.state[mtrand.N-mtrand.left];
-	return is;
-}
-
-inline MTRand& MTRand::operator=( const MTRand& o )
-{
-	if( this == &o ) return (*this);
-	const uint32 *t = o.state;
-	uint32 *s = state;
-	int i = N;
-	for( ; i--; *s++ = *t++ ) {}
-	left = o.left;
-	pNext = &state[N-left];
-	return (*this);
-}
-
-#endif  // MERSENNETWISTER_H
-
-// Change log:
-//
-// v0.1 - First release on 15 May 2000
-//      - Based on code by Makoto Matsumoto, Takuji Nishimura, and Shawn Cokus
-//      - Translated from C to C++
-//      - Made completely ANSI compliant
-//      - Designed convenient interface for initialization, seeding, and
-//        obtaining numbers in default or user-defined ranges
-//      - Added automatic seeding from /dev/urandom or time() and clock()
-//      - Provided functions for saving and loading generator state
-//
-// v0.2 - Fixed bug which reloaded generator one step too late
-//
-// v0.3 - Switched to clearer, faster reload() code from Matthew Bellew
-//
-// v0.4 - Removed trailing newline in saved generator format to be consistent
-//        with output format of built-in types
-//
-// v0.5 - Improved portability by replacing static const int's with enum's and
-//        clarifying return values in seed(); suggested by Eric Heimburg
-//      - Removed MAXINT constant; use 0xffffffffUL instead
-//
-// v0.6 - Eliminated seed overflow when uint32 is larger than 32 bits
-//      - Changed integer [0,n] generator to give better uniformity
-//
-// v0.7 - Fixed operator precedence ambiguity in reload()
-//      - Added access for real numbers in (0,1) and (0,n)
-//
-// v0.8 - Included time.h header to properly support time_t and clock_t
-//
-// v1.0 - Revised seeding to match 26 Jan 2002 update of Nishimura and Matsumoto
-//      - Allowed for seeding with arrays of any length
-//      - Added access for real numbers in [0,1) with 53-bit resolution
-//      - Added access for real numbers from normal (Gaussian) distributions
-//      - Increased overall speed by optimizing twist()
-//      - Doubled speed of integer [0,n] generation
-//      - Fixed out-of-range number generation on 64-bit machines
-//      - Improved portability by substituting literal constants for long enum's
-//      - Changed license from GNU LGPL to BSD
-//
-// v1.1 - Corrected parameter label in randNorm from "variance" to "stddev"
-//      - Changed randNorm algorithm from basic to polar form for efficiency
-//      - Updated includes from deprecated <xxxx.h> to standard <cxxxx> forms
-//      - Cleaned declarations and definitions to please Intel compiler
-//      - Revised twist() operator to work on ones'-complement machines
-//      - Fixed reload() function to work when N and M are unsigned
-//      - Added copy constructor and copy operator from Salvador Espana
diff --git a/src/Mobs/Monster.cpp b/src/Mobs/Monster.cpp
index c8b2ed774..7b8f763af 100644
--- a/src/Mobs/Monster.cpp
+++ b/src/Mobs/Monster.cpp
@@ -9,7 +9,6 @@
 #include "../Entities/Player.h"
 #include "../Entities/ExpOrb.h"
 #include "../MonsterConfig.h"
-#include "../MersenneTwister.h"
 
 #include "../Chunk.h"
 #include "../FastRandom.h"
diff --git a/src/Mobs/Witch.cpp b/src/Mobs/Witch.cpp
index 747a11f97..a3cadbaa0 100644
--- a/src/Mobs/Witch.cpp
+++ b/src/Mobs/Witch.cpp
@@ -2,6 +2,7 @@
 #include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
 
 #include "Witch.h"
+#include "FastRandom.h"
 
 
 
diff --git a/src/Mobs/Witch.h b/src/Mobs/Witch.h
index 03691fef1..8230e1f98 100644
--- a/src/Mobs/Witch.h
+++ b/src/Mobs/Witch.h
@@ -2,7 +2,6 @@
 #pragma once
 
 #include "AggressiveMonster.h"
-#include "../MersenneTwister.h"
 
 
 
diff --git a/src/OSSupport/CMakeLists.txt b/src/OSSupport/CMakeLists.txt
index 592525941..e943ceb18 100644
--- a/src/OSSupport/CMakeLists.txt
+++ b/src/OSSupport/CMakeLists.txt
@@ -13,12 +13,9 @@ SET (SRCS
 	IsThread.cpp
 	ListenThread.cpp
 	Semaphore.cpp
-	Sleep.cpp
 	Socket.cpp
 	SocketThreads.cpp
 	StackTrace.cpp
-	Thread.cpp
-	Timer.cpp
 )
 
 SET (HDRS
@@ -31,12 +28,9 @@ SET (HDRS
 	ListenThread.h
 	Queue.h
 	Semaphore.h
-	Sleep.h
 	Socket.h
 	SocketThreads.h
 	StackTrace.h
-	Thread.h
-	Timer.h
 )
 
 if(NOT MSVC)
diff --git a/src/OSSupport/CriticalSection.cpp b/src/OSSupport/CriticalSection.cpp
index 5dfc8b5f9..13a3e4d9f 100644
--- a/src/OSSupport/CriticalSection.cpp
+++ b/src/OSSupport/CriticalSection.cpp
@@ -1,6 +1,5 @@
 
 #include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
-#include "IsThread.h"
 
 
 
@@ -9,41 +8,12 @@
 ////////////////////////////////////////////////////////////////////////////////
 // cCriticalSection:
 
+#ifdef _DEBUG
 cCriticalSection::cCriticalSection()
 {
-	#ifdef _WIN32
-		InitializeCriticalSection(&m_CriticalSection);
-	#else
-		pthread_mutexattr_init(&m_Attributes);
-		pthread_mutexattr_settype(&m_Attributes, PTHREAD_MUTEX_RECURSIVE);
-
-		if (pthread_mutex_init(&m_CriticalSection, &m_Attributes) != 0)
-		{
-			LOGERROR("Could not initialize Critical Section!");
-		}
-	#endif
-	
-	#ifdef _DEBUG
-		m_IsLocked = 0;
-	#endif  // _DEBUG
-}
-
-
-
-
-
-cCriticalSection::~cCriticalSection()
-{
-	#ifdef _WIN32
-		DeleteCriticalSection(&m_CriticalSection);
-	#else
-		if (pthread_mutex_destroy(&m_CriticalSection) != 0)
-		{
-			LOGWARNING("Could not destroy Critical Section!");
-		}
-		pthread_mutexattr_destroy(&m_Attributes);
-	#endif
+	m_IsLocked = 0;
 }
+#endif  // _DEBUG
 
 
 
@@ -51,15 +21,11 @@ cCriticalSection::~cCriticalSection()
 
 void cCriticalSection::Lock()
 {
-	#ifdef _WIN32
-		EnterCriticalSection(&m_CriticalSection);
-	#else
-		pthread_mutex_lock(&m_CriticalSection);
-	#endif
+	m_Mutex.lock();
 	
 	#ifdef _DEBUG
 		m_IsLocked += 1;
-		m_OwningThreadID = cIsThread::GetCurrentID();
+		m_OwningThreadID = std::this_thread::get_id();
 	#endif  // _DEBUG
 }
 
@@ -74,11 +40,7 @@ void cCriticalSection::Unlock()
 		m_IsLocked -= 1;
 	#endif  // _DEBUG
 	
-	#ifdef _WIN32
-		LeaveCriticalSection(&m_CriticalSection);
-	#else
-		pthread_mutex_unlock(&m_CriticalSection);
-	#endif
+	m_Mutex.unlock();
 }
 
 
@@ -97,7 +59,7 @@ bool cCriticalSection::IsLocked(void)
 
 bool cCriticalSection::IsLockedByCurrentThread(void)
 {
-	return ((m_IsLocked > 0) && (m_OwningThreadID == cIsThread::GetCurrentID()));
+	return ((m_IsLocked > 0) && (m_OwningThreadID == std::this_thread::get_id()));
 }
 #endif  // _DEBUG
 
diff --git a/src/OSSupport/CriticalSection.h b/src/OSSupport/CriticalSection.h
index c3c6e57f0..17fcdfc12 100644
--- a/src/OSSupport/CriticalSection.h
+++ b/src/OSSupport/CriticalSection.h
@@ -1,5 +1,7 @@
 
 #pragma once
+#include <mutex>
+#include <thread>
 
 
 
@@ -8,8 +10,6 @@
 class cCriticalSection
 {
 public:
-	cCriticalSection(void);
-	~cCriticalSection();
 
 	void Lock(void);
 	void Unlock(void);
@@ -17,6 +17,7 @@ public:
 	// IsLocked/IsLockedByCurrentThread are only used in ASSERT statements, but because of the changes with ASSERT they must always be defined
 	// The fake versions (in Release) will not effect the program in any way
 	#ifdef _DEBUG
+	cCriticalSection(void);
 	bool IsLocked(void);
 	bool IsLockedByCurrentThread(void);
 	#else
@@ -27,15 +28,10 @@ public:
 private:
 	#ifdef _DEBUG
 	int           m_IsLocked;  // Number of times this CS is locked
-	unsigned long m_OwningThreadID;
+	std::thread::id m_OwningThreadID;
 	#endif  // _DEBUG
 	
-	#ifdef _WIN32
-		CRITICAL_SECTION m_CriticalSection;
-	#else  // _WIN32
-		pthread_mutex_t     m_CriticalSection;
-		pthread_mutexattr_t m_Attributes;
-	#endif  // else _WIN32
+	std::recursive_mutex m_Mutex;
 } ALIGN_8;
 
 
diff --git a/src/OSSupport/IsThread.cpp b/src/OSSupport/IsThread.cpp
index 1a436623a..9c62c89bf 100644
--- a/src/OSSupport/IsThread.cpp
+++ b/src/OSSupport/IsThread.cpp
@@ -5,49 +5,40 @@
 // This class will eventually suupersede the old cThread class
 
 #include "Globals.h"
-
 #include "IsThread.h"
 
 
 
 
 
-// When in MSVC, the debugger provides "thread naming" by catching special exceptions. Interface here:
 #if defined(_MSC_VER) && defined(_DEBUG)
-//
-// Usage: SetThreadName (-1, "MainThread");
-//
-
-// Code adapted from MSDN: http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
+	// Code adapted from MSDN: http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
 
-const DWORD MS_VC_EXCEPTION = 0x406D1388;
-
-#pragma pack(push, 8)
-typedef struct tagTHREADNAME_INFO
-{
-	DWORD  dwType;      // Must be 0x1000.
-	LPCSTR szName;      // Pointer to name (in user addr space).
-	DWORD  dwThreadID;  // Thread ID (-1 = caller thread).
-	DWORD  dwFlags;     // Reserved for future use, must be zero.
-} THREADNAME_INFO;
-#pragma pack(pop)
-
-static void SetThreadName(DWORD dwThreadID, const char * threadName)
-{
-	THREADNAME_INFO info;
-	info.dwType = 0x1000;
-	info.szName = threadName;
-	info.dwThreadID = dwThreadID;
-	info.dwFlags = 0;
-
-	__try
-	{
-		RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)&info);
-	}
-	__except (EXCEPTION_EXECUTE_HANDLER)
+	const DWORD MS_VC_EXCEPTION = 0x406D1388;
+	#pragma pack(push, 8)
+		struct THREADNAME_INFO
+		{
+			DWORD  dwType;      // Must be 0x1000.
+			LPCSTR szName;      // Pointer to name (in user addr space).
+			DWORD  dwThreadID;  // Thread ID (-1 = caller thread).
+			DWORD  dwFlags;     // Reserved for future use, must be zero.
+		};
+	#pragma pack(pop)
+
+	/** Sets the name of a thread with the specified ID
+	(When in MSVC, the debugger provides "thread naming" by catching special exceptions)
+	*/
+	static void SetThreadName(std::thread * a_Thread, const char * a_ThreadName)
 	{
+		THREADNAME_INFO info { 0x1000, a_ThreadName, GetThreadId(a_Thread->native_handle()), 0 };
+		__try
+		{
+			RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)&info);
+		}
+		__except (EXCEPTION_EXECUTE_HANDLER)
+		{
+		}
 	}
-}
 #endif  // _MSC_VER && _DEBUG
 
 
@@ -57,13 +48,9 @@ static void SetThreadName(DWORD dwThreadID, const char * threadName)
 ////////////////////////////////////////////////////////////////////////////////
 // cIsThread:
 
-cIsThread::cIsThread(const AString & iThreadName) :
+cIsThread::cIsThread(const AString & a_ThreadName) :
 	m_ShouldTerminate(false),
-	m_ThreadName(iThreadName),
-	#ifdef _WIN32
-		m_ThreadID(0),
-	#endif
-	m_Handle(NULL_HANDLE)
+	m_ThreadName(a_ThreadName)
 {
 }
 
@@ -83,35 +70,24 @@ cIsThread::~cIsThread()
 
 bool cIsThread::Start(void)
 {
-	ASSERT(m_Handle == NULL_HANDLE);  // Has already started one thread?
-	#ifdef _WIN32
-		// Create the thread suspended, so that the mHandle variable is valid in the thread procedure
-		m_ThreadID = 0;
-		m_Handle = CreateThread(NULL, 0, thrExecute, this, CREATE_SUSPENDED, &m_ThreadID);
-		if (m_Handle == NULL)
+	try
+	{
+		m_Thread = std::thread(&cIsThread::Execute, this);
+
+		#if defined (_MSC_VER) && defined(_DEBUG)
+		if (!m_ThreadName.empty())
 		{
-			LOGERROR("ERROR: Could not create thread \"%s\", GLE = %u!", m_ThreadName.c_str(), (unsigned)GetLastError());
-			return false;
+			SetThreadName(&m_Thread, m_ThreadName.c_str());
 		}
-		ResumeThread(m_Handle);
-
-		#if defined(_DEBUG) && defined(_MSC_VER)
-			// Thread naming is available only in MSVC
-			if (!m_ThreadName.empty())
-			{
-				SetThreadName(m_ThreadID, m_ThreadName.c_str());
-			}
-		#endif  // _DEBUG and _MSC_VER
-		
-	#else  // _WIN32
-		if (pthread_create(&m_Handle, NULL, thrExecute, this))
-		{
-			LOGERROR("ERROR: Could not create thread \"%s\", !", m_ThreadName.c_str());
-			return false;
-		}
-	#endif  // else _WIN32
+		#endif
 
-	return true;
+		return true;
+	}
+	catch (std::system_error & a_Exception)
+	{
+		LOGERROR("cIsThread::Wait (std::thread) error %i: could not construct thread %s; %s", a_Exception.code().value(), m_ThreadName.c_str(), a_Exception.what());
+		return false;
+	}
 }
 
 
@@ -120,10 +96,6 @@ bool cIsThread::Start(void)
 
 void cIsThread::Stop(void)
 {
-	if (m_Handle == NULL_HANDLE)
-	{
-		return;
-	}
 	m_ShouldTerminate = true;
 	Wait();
 }
@@ -134,59 +106,29 @@ void cIsThread::Stop(void)
 
 bool cIsThread::Wait(void)
 {
-	if (m_Handle == NULL_HANDLE)
-	{
-		return true;
-	}
-	
 	#ifdef LOGD  // ProtoProxy doesn't have LOGD
 		LOGD("Waiting for thread %s to finish", m_ThreadName.c_str());
 	#endif  // LOGD
-	
-	#ifdef _WIN32
-		int res = WaitForSingleObject(m_Handle, INFINITE);
-		m_Handle = NULL;
-		
-		#ifdef LOGD  // ProtoProxy doesn't have LOGD
-			LOGD("Thread %s finished", m_ThreadName.c_str());
-		#endif  // LOGD
-		
-		return (res == WAIT_OBJECT_0);
-	#else  // _WIN32
-		int res = pthread_join(m_Handle, NULL);
-		m_Handle = NULL_HANDLE;
-		
-		#ifdef LOGD  // ProtoProxy doesn't have LOGD
-			LOGD("Thread %s finished", m_ThreadName.c_str());
-		#endif  // LOGD
-		
-		return (res == 0);
-	#endif  // else _WIN32
-}
-
-
-
 
+	if (m_Thread.joinable())
+	{
+		try
+		{
+			m_Thread.join();
+			return true;
+		}
+		catch (std::system_error & a_Exception)
+		{
+			LOGERROR("cIsThread::Wait (std::thread) error %i: could not join thread %s; %s", a_Exception.code().value(), m_ThreadName.c_str(), a_Exception.what());
+			return false;
+		}
+	}
 
-unsigned long cIsThread::GetCurrentID(void)
-{
-	#ifdef _WIN32
-		return (unsigned long) GetCurrentThreadId();
-	#else
-		return (unsigned long) pthread_self();
+	#ifdef LOGD  // ProtoProxy doesn't have LOGD
+		LOGD("Thread %s finished", m_ThreadName.c_str());
 	#endif
-}
 
-
-
-
-bool cIsThread::IsCurrentThread(void) const
-{
-	#ifdef _WIN32
-		return (GetCurrentThreadId() == m_ThreadID);
-	#else
-		return (m_Handle == pthread_self());
-	#endif
+	return true;
 }
 
 
diff --git a/src/OSSupport/IsThread.h b/src/OSSupport/IsThread.h
index 5c8d28d2d..131c6950e 100644
--- a/src/OSSupport/IsThread.h
+++ b/src/OSSupport/IsThread.h
@@ -16,8 +16,7 @@ In the descending class' constructor call the Start() method to start the thread
 
 
 #pragma once
-#ifndef CISTHREAD_H_INCLUDED
-#define CISTHREAD_H_INCLUDED
+#include <thread>
 
 
 
@@ -33,7 +32,7 @@ protected:
 	volatile bool m_ShouldTerminate;
 
 public:
-	cIsThread(const AString & iThreadName);
+	cIsThread(const AString & a_ThreadName);
 	virtual ~cIsThread();
 
 	/// Starts the thread; returns without waiting for the actual start
@@ -45,56 +44,14 @@ public:
 	/// Waits for the thread to finish. Doesn't signalize the ShouldTerminate flag
 	bool Wait(void);
 
-	/// Returns the OS-dependent thread ID for the caller's thread
-	static unsigned long GetCurrentID(void);
-
 	/** Returns true if the thread calling this function is the thread contained within this object. */
-	bool IsCurrentThread(void) const;
+	bool IsCurrentThread(void) const { return std::this_thread::get_id() == m_Thread.get_id(); }
 
 protected:
 	AString m_ThreadName;
-
-	// Value used for "no handle":
-	#ifdef _WIN32
-		#define NULL_HANDLE NULL
-	#else
-		#define NULL_HANDLE 0
-	#endif
-
-	#ifdef _WIN32
-
-		DWORD m_ThreadID;
-		HANDLE m_Handle;
-
-		static DWORD __stdcall thrExecute(LPVOID a_Param)
-		{
-			// Create a window so that the thread can be identified by 3rd party tools:
-			HWND IdentificationWnd = CreateWindowA("STATIC", ((cIsThread *)a_Param)->m_ThreadName.c_str(), 0, 0, 0, 0, WS_OVERLAPPED, NULL, NULL, NULL, NULL);
-
-			// Run the thread:
-			((cIsThread *)a_Param)->Execute();
-
-			// Destroy the identification window:
-			DestroyWindow(IdentificationWnd);
-
-			return 0;
-		}
-
-	#else  // _WIN32
-
-		pthread_t m_Handle;
-
-		static void * thrExecute(void * a_Param)
-		{
-			(static_cast<cIsThread *>(a_Param))->Execute();
-			return NULL;
-		}
-
-	#endif  // else _WIN32
+	std::thread m_Thread;
 } ;
 
 
 
 
-
-#endif  // CISTHREAD_H_INCLUDED
diff --git a/src/OSSupport/Sleep.cpp b/src/OSSupport/Sleep.cpp
deleted file mode 100644
index 297d668d7..000000000
--- a/src/OSSupport/Sleep.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-
-#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
-
-#ifndef _WIN32
-	#include <unistd.h>
-#endif
-
-
-
-
-
-void cSleep::MilliSleep( unsigned int a_MilliSeconds)
-{
-#ifdef _WIN32
-	Sleep(a_MilliSeconds);  // Don't tick too much
-#else
-	usleep(a_MilliSeconds*1000);
-#endif
-}
diff --git a/src/OSSupport/Sleep.h b/src/OSSupport/Sleep.h
deleted file mode 100644
index 57d29682c..000000000
--- a/src/OSSupport/Sleep.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-class cSleep
-{
-public:
-	static void MilliSleep( unsigned int a_MilliSeconds);
-};
diff --git a/src/OSSupport/Thread.cpp b/src/OSSupport/Thread.cpp
deleted file mode 100644
index 6188d5088..000000000
--- a/src/OSSupport/Thread.cpp
+++ /dev/null
@@ -1,146 +0,0 @@
-
-#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
-
-
-
-
-
-// When in MSVC, the debugger provides "thread naming" by catching special exceptions. Interface here:
-#ifdef _MSC_VER
-//
-// Usage: SetThreadName (-1, "MainThread");
-//
-
-// Code adapted from MSDN: http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
-
-const DWORD MS_VC_EXCEPTION = 0x406D1388;
-
-#pragma pack(push, 8)
-typedef struct tagTHREADNAME_INFO
-{
-	DWORD  dwType;      // Must be 0x1000.
-	LPCSTR szName;      // Pointer to name (in user addr space).
-	DWORD  dwThreadID;  // Thread ID (-1 = caller thread).
-	DWORD  dwFlags;     // Reserved for future use, must be zero.
-} THREADNAME_INFO;
-#pragma pack(pop)
-
-static void SetThreadName(DWORD dwThreadID, const char * threadName)
-{
-	THREADNAME_INFO info;
-	info.dwType = 0x1000;
-	info.szName = threadName;
-	info.dwThreadID = dwThreadID;
-	info.dwFlags = 0;
-
-	__try
-	{
-		RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)&info);
-	}
-	__except (EXCEPTION_EXECUTE_HANDLER)
-	{
-	}
-}
-#endif  // _MSC_VER
-
-
-
-
-
-cThread::cThread( ThreadFunc a_ThreadFunction, void* a_Param, const char* a_ThreadName /* = 0 */)
-	: m_ThreadFunction( a_ThreadFunction)
-	, m_Param( a_Param)
-	, m_Event( new cEvent())
-	, m_StopEvent( 0)
-{
-	if (a_ThreadName)
-	{
-		m_ThreadName.assign(a_ThreadName);
-	}
-}
-
-
-
-
-
-cThread::~cThread()
-{
-	delete m_Event;
-	m_Event = NULL;
-	
-	if (m_StopEvent)
-	{
-		m_StopEvent->Wait();
-		delete m_StopEvent;
-		m_StopEvent = NULL;
-	}
-}
-
-
-
-
-
-void cThread::Start( bool a_bWaitOnDelete /* = true */)
-{
-	if (a_bWaitOnDelete)
-	{
-		m_StopEvent = new cEvent();
-	}
-
-#ifndef _WIN32
-	pthread_t SndThread;
-	if (pthread_create( &SndThread, NULL, MyThread, this))
-	{
-		LOGERROR("ERROR: Could not create thread!");
-	}
-#else
-	DWORD ThreadID = 0;
-	HANDLE hThread = CreateThread(NULL  // security
-		, 0  // stack size
-		, (LPTHREAD_START_ROUTINE) MyThread  // function name
-		, this  // parameters
-		, 0  // flags
-		, &ThreadID);  // thread id
-	CloseHandle( hThread);
-
-	#ifdef _MSC_VER
-	if (!m_ThreadName.empty())
-	{
-		SetThreadName(ThreadID, m_ThreadName.c_str());
-	}
-	#endif  // _MSC_VER
-#endif
-
-	// Wait until thread has actually been created
-	m_Event->Wait();
-}
-
-
-
-
-
-#ifdef _WIN32
-unsigned long cThread::MyThread(void* a_Param)
-#else
-void *cThread::MyThread( void *a_Param)
-#endif
-{
-	cThread* self = (cThread*)a_Param;
-	cEvent* StopEvent = self->m_StopEvent;
-
-	ThreadFunc* ThreadFunction = self->m_ThreadFunction;
-	void* ThreadParam = self->m_Param;
-
-	// Set event to let other thread know this thread has been created and it's safe to delete the cThread object
-	self->m_Event->Set();
-
-	ThreadFunction( ThreadParam);
-
-	// If the thread was marked as wait-on-delete, signal the event being waited on:
-	if (StopEvent != nullptr)
-	{
-		StopEvent->Set();
-	}
-
-	return 0;
-}
diff --git a/src/OSSupport/Thread.h b/src/OSSupport/Thread.h
deleted file mode 100644
index 7ee352c82..000000000
--- a/src/OSSupport/Thread.h
+++ /dev/null
@@ -1,26 +0,0 @@
-#pragma once
-
-class cThread
-{
-public:
-	typedef void (ThreadFunc)(void*);
-	cThread( ThreadFunc a_ThreadFunction, void* a_Param, const char* a_ThreadName = 0);
-	~cThread();
-
-	void Start( bool a_bWaitOnDelete = true);
-	void WaitForThread();
-private:
-	ThreadFunc* m_ThreadFunction;
-
-#ifdef _WIN32
-	static unsigned long MyThread(void* a_Param);
-#else
-	static void *MyThread( void *lpParam);
-#endif
-
-	void* m_Param;
-	cEvent* m_Event;
-	cEvent* m_StopEvent;
-
-	AString m_ThreadName;
-};
diff --git a/src/OSSupport/Timer.cpp b/src/OSSupport/Timer.cpp
deleted file mode 100644
index fd838dd0d..000000000
--- a/src/OSSupport/Timer.cpp
+++ /dev/null
@@ -1,37 +0,0 @@
-
-#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
-
-#include "Timer.h"
-
-
-
-
-
-
-cTimer::cTimer(void)
-{
-	#ifdef _WIN32
-		QueryPerformanceFrequency(&m_TicksPerSecond);
-	#endif
-}
-
-
-
-
-
-long long cTimer::GetNowTime(void)
-{
-	#ifdef _WIN32
-		LARGE_INTEGER now;
-		QueryPerformanceCounter(&now);
-		return ((now.QuadPart * 1000) / m_TicksPerSecond.QuadPart);
-	#else
-		struct timeval  now;
-		gettimeofday(&now, NULL);
-		return (long long)now.tv_sec * 1000 + (long long)now.tv_usec / 1000;
-	#endif
-}
-
-
-
-
diff --git a/src/OSSupport/Timer.h b/src/OSSupport/Timer.h
deleted file mode 100644
index a059daa41..000000000
--- a/src/OSSupport/Timer.h
+++ /dev/null
@@ -1,32 +0,0 @@
-
-// Timer.h
-
-// Declares the cTimer class representing an OS-independent of retrieving current time with msec accuracy
-
-
-
-
-
-#pragma once
-
-
-
-
-
-class cTimer
-{
-public:
-	cTimer(void);
-
-	// Returns the current time expressed in milliseconds
-	long long GetNowTime(void);
-private:
-
-	#ifdef _WIN32
-		LARGE_INTEGER m_TicksPerSecond;
-	#endif
-} ;
-
-
-
-
diff --git a/src/ProbabDistrib.cpp b/src/ProbabDistrib.cpp
index 7a5869dcc..c34c75982 100644
--- a/src/ProbabDistrib.cpp
+++ b/src/ProbabDistrib.cpp
@@ -5,7 +5,7 @@
 
 #include "Globals.h"
 #include "ProbabDistrib.h"
-#include "MersenneTwister.h"
+#include "FastRandom.h"
 
 
 
diff --git a/src/Root.cpp b/src/Root.cpp
index e309bb174..865b2a213 100644
--- a/src/Root.cpp
+++ b/src/Root.cpp
@@ -16,7 +16,6 @@
 #include "Protocol/ProtocolRecognizer.h"  // for protocol version constants
 #include "CommandOutput.h"
 #include "DeadlockDetect.h"
-#include "OSSupport/Timer.h"
 #include "LoggerListeners.h"
 #include "BuildInfo.h"
 #include "IniFile.h"
@@ -42,7 +41,6 @@ cRoot* cRoot::s_Root = nullptr;
 
 cRoot::cRoot(void) :
 	m_pDefaultWorld(nullptr),
-	m_InputThread(nullptr),
 	m_Server(nullptr),
 	m_MonsterConfig(nullptr),
 	m_CraftingRecipes(nullptr),
@@ -68,26 +66,24 @@ cRoot::~cRoot()
 
 
 
-void cRoot::InputThread(void * a_Params)
+void cRoot::InputThread(cRoot & a_Params)
 {
-	cRoot & self = *(cRoot*)a_Params;
-
 	cLogCommandOutputCallback Output;
 	
-	while (!self.m_bStop && !self.m_bRestart && !m_TerminateEventRaised && std::cin.good())
+	while (!a_Params.m_bStop && !a_Params.m_bRestart && !m_TerminateEventRaised && std::cin.good())
 	{
 		AString Command;
 		std::getline(std::cin, Command);
 		if (!Command.empty())
 		{
-			self.ExecuteConsoleCommand(TrimString(Command), Output);
+			a_Params.ExecuteConsoleCommand(TrimString(Command), Output);
 		}
 	}
 
 	if (m_TerminateEventRaised || !std::cin.good())
 	{
 		// We have come here because the std::cin has received an EOF / a terminate signal has been sent, and the server is still running; stop the server:
-		self.m_bStop = true;
+		a_Params.m_bStop = true;
 	}
 }
 
@@ -120,9 +116,7 @@ void cRoot::Start(void)
 	m_bStop = false;
 	while (!m_bStop)
 	{
-		cTimer Time;
-		long long mseconds = Time.GetNowTime();
-		
+		auto BeginTime = std::chrono::steady_clock::now();
 		m_bRestart = false;
 
 		LoadGlobalSettings();
@@ -191,21 +185,25 @@ void cRoot::Start(void)
 
 		#if !defined(ANDROID_NDK)
 		LOGD("Starting InputThread...");
-		m_InputThread = new cThread( InputThread, this, "cRoot::InputThread");
-		m_InputThread->Start( false);  // We should NOT wait? Otherwise we can't stop the server from other threads than the input thread
+		try
+		{
+			m_InputThread = std::thread(InputThread, std::ref(*this));
+			m_InputThread.detach();
+		}
+		catch (std::system_error & a_Exception)
+		{
+			LOGERROR("cRoot::Start (std::thread) error %i: could not construct input thread; %s", a_Exception.code().value(), a_Exception.what());
+		}
 		#endif
 
-		long long finishmseconds = Time.GetNowTime();
-		finishmseconds -= mseconds;
-
-		LOG("Startup complete, took %lld ms!", finishmseconds);
+		LOG("Startup complete, took %lld ms!", std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - BeginTime).count());
 		#ifdef _WIN32
 		EnableMenuItem(hmenu, SC_CLOSE, MF_ENABLED);  // Re-enable close button
 		#endif
 
 		while (!m_bStop && !m_bRestart && !m_TerminateEventRaised)  // These are modified by external threads
 		{
-			cSleep::MilliSleep(1000);
+			std::this_thread::sleep_for(std::chrono::seconds(1));
 		}
 
 		if (m_TerminateEventRaised)
@@ -213,10 +211,6 @@ void cRoot::Start(void)
 			m_bStop = true;
 		}
 
-		#if !defined(ANDROID_NDK)
-		delete m_InputThread; m_InputThread = nullptr;
-		#endif
-
 		// Stop the server:
 		m_WebAdmin->Stop();
 		LOG("Shutting down server...");
diff --git a/src/Root.h b/src/Root.h
index 29753a47d..e70b284f9 100644
--- a/src/Root.h
+++ b/src/Root.h
@@ -6,6 +6,7 @@
 #include "HTTPServer/HTTPServer.h"
 #include "Defines.h"
 #include "RankManager.h"
+#include <thread>
 
 
 
@@ -177,7 +178,7 @@ private:
 	cCriticalSection m_CSPendingCommands;
 	cCommandQueue    m_PendingCommands;
 
-	cThread * m_InputThread;
+	std::thread m_InputThread;
 
 	cServer *        m_Server;
 	cMonsterConfig * m_MonsterConfig;
@@ -212,10 +213,10 @@ private:
 	
 	/// Does the actual work of executing a command
 	void DoExecuteConsoleCommand(const AString & a_Cmd);
-
-	static void InputThread(void* a_Params);
 	
 	static cRoot* s_Root;
+
+	static void InputThread(cRoot & a_Params);
 };  // tolua_export
 
 
diff --git a/src/Server.cpp b/src/Server.cpp
index bbb5ecff3..db1522602 100644
--- a/src/Server.cpp
+++ b/src/Server.cpp
@@ -4,7 +4,6 @@
 
 #include "Server.h"
 #include "ClientHandle.h"
-#include "OSSupport/Timer.h"
 #include "Mobs/Monster.h"
 #include "OSSupport/Socket.h"
 #include "Root.h"
@@ -20,8 +19,6 @@
 #include "Protocol/ProtocolRecognizer.h"
 #include "CommandOutput.h"
 
-#include "MersenneTwister.h"
-
 #include "IniFile.h"
 #include "Vector3.h"
 
@@ -75,22 +72,19 @@ cServer::cTickThread::cTickThread(cServer & a_Server) :
 
 void cServer::cTickThread::Execute(void)
 {
-	cTimer Timer;
-
-	long long msPerTick = 50;
-	long long LastTime = Timer.GetNowTime();
+	auto LastTime = std::chrono::steady_clock::now();
+	static const auto msPerTick = std::chrono::milliseconds(50);
 
 	while (!m_ShouldTerminate)
 	{
-		long long NowTime = Timer.GetNowTime();
-		float DeltaTime = (float)(NowTime-LastTime);
-		m_ShouldTerminate = !m_Server.Tick(DeltaTime);
-		long long TickTime = Timer.GetNowTime() - NowTime;
+		auto NowTime = std::chrono::steady_clock::now();
+		m_ShouldTerminate = !m_Server.Tick(static_cast<float>(std::chrono::duration_cast<std::chrono::milliseconds>(NowTime - LastTime).count()));
+		auto TickTime = std::chrono::steady_clock::now() - NowTime;
 		
 		if (TickTime < msPerTick)
 		{
 			// Stretch tick time until it's at least msPerTick
-			cSleep::MilliSleep((unsigned int)(msPerTick - TickTime));
+			std::this_thread::sleep_for(msPerTick - TickTime);
 		}
 
 		LastTime = NowTime;
diff --git a/src/UI/SlotArea.cpp b/src/UI/SlotArea.cpp
index ff934c049..e784569d9 100644
--- a/src/UI/SlotArea.cpp
+++ b/src/UI/SlotArea.cpp
@@ -2322,7 +2322,7 @@ cItem * cSlotAreaTemporary::GetPlayerSlots(cPlayer & a_Player)
 	{
 		return nullptr;
 	}
-	return &(itr->second[0]);
+	return itr->second.data();
 }
 
 
diff --git a/src/World.cpp b/src/World.cpp
index 4a741d37b..14010b8b1 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -11,7 +11,6 @@
 #include "IniFile.h"
 #include "ChunkMap.h"
 #include "Generating/ChunkDesc.h"
-#include "OSSupport/Timer.h"
 #include "SetChunkData.h"
 
 // Serializers
@@ -45,7 +44,6 @@
 #include "MobCensus.h"
 #include "MobSpawner.h"
 
-#include "MersenneTwister.h"
 #include "Generating/Trees.h"
 #include "Bindings/PluginManager.h"
 #include "Blocks/BlockHandler.h"
@@ -92,7 +90,6 @@ public:
 		m_PrepareDistance(a_PrepareDistance),
 		m_MaxIdx(a_PrepareDistance * a_PrepareDistance),
 		m_NumPrepared(0),
-		m_LastReportTime(0),
 		m_LastReportChunkCount(0)
 	{
 		// Start the thread:
@@ -113,7 +110,7 @@ public:
 		m_MaxIdx = m_PrepareDistance * m_PrepareDistance;
 		int maxQueue = std::min(m_MaxIdx - 1, 100);  // Number of chunks to queue at once
 		m_NextIdx = maxQueue;
-		m_LastReportTime = m_Timer.GetNowTime();
+		m_LastReportTime = std::chrono::steady_clock::now();
 		for (int i = 0; i < maxQueue; i++)
 		{
 			int chunkX, chunkZ;
@@ -146,16 +143,12 @@ protected:
 	/** Event used to signal that the preparation is finished. */
 	cEvent m_EvtFinished;
 
-	/** The timer used to report progress every second. */
-	cTimer m_Timer;
-
 	/** The timestamp of the last progress report emitted. */
-	long long m_LastReportTime;
+	std::chrono::steady_clock::time_point m_LastReportTime;
 
 	/** Number of chunks prepared when the last progress report was emitted. */
 	int m_LastReportChunkCount;
 
-
 	// cChunkCoordCallback override:
 	virtual void Call(int a_ChunkX, int a_ChunkZ)
 	{
@@ -178,15 +171,15 @@ protected:
 		}
 
 		// Report progress every 1 second:
-		long long now = m_Timer.GetNowTime();
-		if (now - m_LastReportTime > 1000)
+		auto Now = std::chrono::steady_clock::now();
+		if (Now - m_LastReportTime > std::chrono::seconds(1))
 		{
-			float percentDone = static_cast<float>(m_NumPrepared * 100) / m_MaxIdx;
-			float chunkSpeed = static_cast<float>((m_NumPrepared - m_LastReportChunkCount) * 1000) / (now - m_LastReportTime);
-			LOG("Preparing spawn (%s): %.02f%% done (%d chunks out of %d; %.02f chunks / sec)",
-				m_World.GetName().c_str(), percentDone, m_NumPrepared, m_MaxIdx, chunkSpeed
+			float PercentDone = static_cast<float>(m_NumPrepared * 100) / m_MaxIdx;
+			float ChunkSpeed = static_cast<float>((m_NumPrepared - m_LastReportChunkCount) * 1000) / std::chrono::duration_cast<std::chrono::milliseconds>(Now - m_LastReportTime).count();
+			LOG("Preparing spawn (%s): %.02f%% (%d/%d; %.02f chunks/s)",
+				m_World.GetName().c_str(), PercentDone, m_NumPrepared, m_MaxIdx, ChunkSpeed
 			);
-			m_LastReportTime = now;
+			m_LastReportTime = Now;
 			m_LastReportChunkCount = m_NumPrepared;
 		}
 	}
@@ -239,23 +232,20 @@ cWorld::cTickThread::cTickThread(cWorld & a_World) :
 
 void cWorld::cTickThread::Execute(void)
 {
-	cTimer Timer;
-
-	const Int64 msPerTick = 50;
-	Int64 LastTime = Timer.GetNowTime();
+	auto LastTime = std::chrono::steady_clock::now();
+	static const auto msPerTick = std::chrono::milliseconds(50);
+	auto TickTime = std::chrono::steady_clock::duration(50);
 
-	Int64 TickDuration = 50;
 	while (!m_ShouldTerminate)
 	{
-		Int64 NowTime = Timer.GetNowTime();
-		float DeltaTime = (float)(NowTime - LastTime);
-		m_World.Tick(DeltaTime, (int)TickDuration);
-		TickDuration = Timer.GetNowTime() - NowTime;
+		auto NowTime = std::chrono::steady_clock::now();
+		m_World.Tick(static_cast<float>(std::chrono::duration_cast<std::chrono::milliseconds>(NowTime - LastTime).count()), std::chrono::duration_cast<std::chrono::duration<int>>(TickTime).count());
+		TickTime = std::chrono::steady_clock::now() - NowTime;
 		
-		if (TickDuration < msPerTick)
+		if (TickTime < msPerTick)
 		{
 			// Stretch tick time until it's at least msPerTick
-			cSleep::MilliSleep((unsigned int)(msPerTick - TickDuration));
+			std::this_thread::sleep_for(msPerTick - TickTime);
 		}
 
 		LastTime = NowTime;
diff --git a/src/World.h b/src/World.h
index 31bc9dad6..d64be208e 100644
--- a/src/World.h
+++ b/src/World.h
@@ -10,7 +10,6 @@
 #define MAX_PLAYERS 65535
 
 #include "Simulator/SimulatorManager.h"
-#include "MersenneTwister.h"
 #include "ChunkMap.h"
 #include "WorldStorage/WorldStorage.h"
 #include "Generating/ChunkGenerator.h"
@@ -26,6 +25,7 @@
 #include "MapManager.h"
 #include "Blocks/WorldInterface.h"
 #include "Blocks/BroadcastInterface.h"
+#include "FastRandom.h"
 #include "ClientHandle.h"
 
 
diff --git a/src/WorldStorage/FireworksSerializer.cpp b/src/WorldStorage/FireworksSerializer.cpp
index ecb600483..91a5b8b63 100644
--- a/src/WorldStorage/FireworksSerializer.cpp
+++ b/src/WorldStorage/FireworksSerializer.cpp
@@ -22,11 +22,11 @@ void cFireworkItem::WriteToNBTCompound(const cFireworkItem & a_FireworkItem, cFa
 			a_Writer.AddByte("Type", a_FireworkItem.m_Type);
 			if (!a_FireworkItem.m_Colours.empty())
 			{
-				a_Writer.AddIntArray("Colors", &(a_FireworkItem.m_Colours[0]), a_FireworkItem.m_Colours.size());
+				a_Writer.AddIntArray("Colors", a_FireworkItem.m_Colours.data(), a_FireworkItem.m_Colours.size());
 			}
 			if (!a_FireworkItem.m_FadeColours.empty())
 			{
-				a_Writer.AddIntArray("FadeColors", &(a_FireworkItem.m_FadeColours[0]), a_FireworkItem.m_FadeColours.size());
+				a_Writer.AddIntArray("FadeColors", a_FireworkItem.m_FadeColours.data(), a_FireworkItem.m_FadeColours.size());
 			}
 			a_Writer.EndCompound();
 			a_Writer.EndList();
@@ -41,11 +41,11 @@ void cFireworkItem::WriteToNBTCompound(const cFireworkItem & a_FireworkItem, cFa
 			a_Writer.AddByte("Type", a_FireworkItem.m_Type);
 			if (!a_FireworkItem.m_Colours.empty())
 			{
-				a_Writer.AddIntArray("Colors", &(a_FireworkItem.m_Colours[0]), a_FireworkItem.m_Colours.size());
+				a_Writer.AddIntArray("Colors", a_FireworkItem.m_Colours.data(), a_FireworkItem.m_Colours.size());
 			}
 			if (!a_FireworkItem.m_FadeColours.empty())
 			{
-				a_Writer.AddIntArray("FadeColors", &(a_FireworkItem.m_FadeColours[0]), a_FireworkItem.m_FadeColours.size());
+				a_Writer.AddIntArray("FadeColors", a_FireworkItem.m_FadeColours.data(), a_FireworkItem.m_FadeColours.size());
 			}
 			a_Writer.EndCompound();
 			break;
diff --git a/src/WorldStorage/MapSerializer.cpp b/src/WorldStorage/MapSerializer.cpp
index 4a913c81a..f2d35b318 100644
--- a/src/WorldStorage/MapSerializer.cpp
+++ b/src/WorldStorage/MapSerializer.cpp
@@ -112,7 +112,7 @@ void cMapSerializer::SaveMapToNBT(cFastNBTWriter & a_Writer)
 	a_Writer.AddInt("zCenter", m_Map->GetCenterZ());
 
 	const cMap::cColorList & Data = m_Map->GetData();
-	a_Writer.AddByteArray("colors", (char *) &Data[0], Data.size());
+	a_Writer.AddByteArray("colors", (char *)Data.data(), Data.size());
 
 	a_Writer.EndCompound();
 }
@@ -190,7 +190,7 @@ bool cMapSerializer::LoadMapFromNBT(const cParsedNBT & a_NBT)
 	CurrLine = a_NBT.FindChildByName(Data, "colors");
 	if ((CurrLine >= 0) && (a_NBT.GetType(CurrLine) == TAG_ByteArray))
 	{
-		memcpy(&m_Map->m_Data[0], a_NBT.GetData(CurrLine), NumPixels);
+		memcpy(m_Map->m_Data.data(), a_NBT.GetData(CurrLine), NumPixels);
 	}
 
 	return true;
diff --git a/src/main.cpp b/src/main.cpp
index fe4b360a5..d4adc1ed9 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -163,9 +163,9 @@ BOOL CtrlHandler(DWORD fdwCtrlType)
 	cRoot::m_TerminateEventRaised = true;
 	LOGD("Terminate event raised from the Windows CtrlHandler");
 
-	if (fdwCtrlType == CTRL_CLOSE_EVENT)  // Console window closed via 'x' button, Windows will try to close immediately, therefore...
+	while (!g_ServerTerminated)
 	{
-		while (!g_ServerTerminated) { cSleep::MilliSleep(100); }  // Delay as much as possible to try to get the server to shut down cleanly
+		std::this_thread::sleep_for(std::chrono::milliseconds(50));  // Delay as much as possible to try to get the server to shut down cleanly
 	}
 
 	return TRUE;