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diff --git a/game/server/serverbenchmark_base.h b/game/server/serverbenchmark_base.h
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+++ b/game/server/serverbenchmark_base.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================
+
+#ifndef SERVERBENCHMARK_BASE_H
+#define SERVERBENCHMARK_BASE_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+// The base server code calls into this.
+class IServerBenchmark
+{
+public:
+	virtual bool StartBenchmark() = 0;
+	virtual void UpdateBenchmark() = 0;
+	virtual void EndBenchmark() = 0;
+	
+	virtual bool IsBenchmarkRunning() = 0;
+	virtual bool IsLocalBenchmarkPlayer( CBasePlayer *pPlayer ) = 0;
+
+	// Game-specific benchmark code should use this.
+	virtual int RandomInt( int nMin, int nMax ) = 0;
+	virtual float RandomFloat( float flMin, float flMax ) = 0;
+	virtual int GetTickOffset() = 0;
+};
+
+extern IServerBenchmark *g_pServerBenchmark;
+
+
+//
+// Each game can derive from this to hook into the server benchmark.
+//
+// Hooks should always use g_pServerBenchmark->RandomInt/Float to get random numbers
+// so the benchmark is deterministic.
+//
+// If they use an absolute tick number for anything, then they should also call g_pServerBenchmark->GetTickOffset() 
+// to get a tick count since the start of the benchmark instead of looking at gpGlobals->tickcount.
+//
+class CServerBenchmarkHook
+{
+public:
+	CServerBenchmarkHook();
+
+	virtual void StartBenchmark()  {}
+	virtual void UpdateBenchmark() {}
+	virtual void EndBenchmark() {}
+
+	// Give a list of model names that can be spawned in for physics props during the simulation.
+	virtual void GetPhysicsModelNames( CUtlVector<char*> &modelNames ) = 0;
+
+	// The benchmark will call this to create a bot each time it wants to create a player.
+	// If you want to manage the bots yourself, you can return NULL here.
+	virtual CBasePlayer* CreateBot() = 0;
+
+private:
+	friend class CServerBenchmark;
+	static CServerBenchmarkHook *s_pBenchmarkHook; // There can be only one!!
+};
+
+
+#endif // SERVERBENCHMARK_BASE_H