Differential D3769 Diff 16947 source/simulation2/components/CCmpAIManager.cpp

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source/simulation2/components/CCmpAIManager.cpp

/* Copyright (C) 2020 Wildfire Games.		/* Copyright (C) 2021 Wildfire Games.
* This file is part of 0 A.D.		* This file is part of 0 A.D.
*		*
* 0 A.D. is free software: you can redistribute it and/or modify		* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by		* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or		* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.		* (at your option) any later version.
*		*
* 0 A.D. is distributed in the hope that it will be useful,		* 0 A.D. is distributed in the hope that it will be useful,
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extern void QuitEngine();		extern void QuitEngine();

/**		/**
* @file		* @file
* Player AI interface.		* Player AI interface.
* AI is primarily scripted, and the CCmpAIManager component defined here		* AI is primarily scripted, and the CCmpAIManager component defined here
* takes care of managing all the scripts.		* takes care of managing all the scripts.
*		*
* To avoid slow AI scripts causing jerky rendering, they are run in a background		* The original idea was to run CAIWorker in a separate thread to prevent
* thread (maintained by CAIWorker) so that it's okay if they take a whole simulation		* slow AIs from impacting framerate. However, copying the game-state every turn
* turn before returning their results (though preferably they shouldn't use nearly		* proved difficult and rather slow itself (and isn't threadable, obviously).
* that much CPU).		* For these reasons, the design was changed to a single-thread, same-compartment, different-realm design.
		* The AI can therefore directly use the simulation data via the 'Sim' & 'SimEngine' globals.
		* As a result, a lof of the code is still designed to be "thread-ready", but this no longer matters.
*		*
* CCmpAIManager grabs the world state after each turn (making use of AIInterface.js		* TODO: despite the above, it would still be useful to allow the AI to run tasks asynchronously (and off-thread).
* and AIProxy.js to decide what data to include) then passes it to CAIWorker.		* This could be implemented by having a separate JS runtime in a different thread,
* The AI scripts will then run asynchronously and return a list of commands to execute.		* that runs tasks and returns after a distinct # of simulation turns (to maintain determinism).
* Any attempts to read the command list (including indirectly via serialization)
* will block until it's actually completed, so the rest of the engine should avoid
* reading it for as long as possible.
*		*
* JS::Values are passed between the game and AI threads using ScriptInterface::StructuredClone.		* Note also that the RL Interface, by default, uses the 'AI representation'.
*		* This representation, alimented by the JS AIInterface/AIProxy tandem, is likely to grow smaller over time
* TODO: actually the thread isn't implemented yet, because performance hasn't been		* as the AI uses more sim data directly.
* sufficiently problematic to justify the complexity yet, but the CAIWorker interface
* is designed to hopefully support threading when we want it.
*/		*/

/**		/**
* Implements worker thread for CCmpAIManager.		* AI computation orchestator for CCmpAIManager.
*/		*/
class CAIWorker		class CAIWorker
{		{
private:		private:
class CAIPlayer		class CAIPlayer
{		{
NONCOPYABLE(CAIPlayer);		NONCOPYABLE(CAIPlayer);
public:		public:
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std::wstring m_Behavior;		std::wstring m_Behavior;
bool m_UseSharedComponent;		bool m_UseSharedComponent;

// Take care to keep this declaration before heap rooted members. Destructors of heap rooted		// Take care to keep this declaration before heap rooted members. Destructors of heap rooted
// members have to be called before the context destructor.		// members have to be called before the context destructor.
shared_ptr<ScriptInterface> m_ScriptInterface;		shared_ptr<ScriptInterface> m_ScriptInterface;

JS::PersistentRootedValue m_Obj;		JS::PersistentRootedValue m_Obj;
std::vector<ScriptInterface::StructuredClone > m_Commands;		std::vector<ScriptInterface::StructuredClone> m_Commands;
};		};

public:		public:
struct SCommandSets		struct SCommandSets
{		{
player_id_t player;		player_id_t player;
std::vector<ScriptInterface::StructuredClone > commands;		std::vector<ScriptInterface::StructuredClone> commands;
};		};

CAIWorker() :		CAIWorker() :
m_ScriptInterface(new ScriptInterface("Engine", "AI", g_ScriptContext)),
m_TurnNum(0),		m_TurnNum(0),
m_CommandsComputed(true),		m_CommandsComputed(true),
m_HasLoadedEntityTemplates(false),		m_HasLoadedEntityTemplates(false),
m_HasSharedComponent(false),		m_HasSharedComponent(false)
m_EntityTemplates(g_ScriptContext->GetGeneralJSContext()),		{
m_SharedAIObj(g_ScriptContext->GetGeneralJSContext()),		}
m_PassabilityMapVal(g_ScriptContext->GetGeneralJSContext()),
m_TerritoryMapVal(g_ScriptContext->GetGeneralJSContext())		~CAIWorker()
		{
		JS_RemoveExtraGCRootsTracer(m_ScriptInterface->GetGeneralJSContext(), Trace, this);
		}

		void Init(const ScriptInterface& simInterface)
{		{
		// Create the script interface in the same compartment as the simulation interface.
		// This will allow us to directly share data from the sim to the AI (and vice versa, should the need arise).
		m_ScriptInterface = std::make_shared<ScriptInterface>("Engine", "AI", simInterface);

		ScriptRequest rq(m_ScriptInterface);

		m_EntityTemplates.init(rq.cx);
		m_SharedAIObj.init(rq.cx);
		m_PassabilityMapVal.init(rq.cx);
		m_TerritoryMapVal.init(rq.cx);

m_ScriptInterface->ReplaceNondeterministicRNG(m_RNG);		m_ScriptInterface->ReplaceNondeterministicRNG(m_RNG);

m_ScriptInterface->SetCallbackData(static_cast<void*> (this));		m_ScriptInterface->SetCallbackData(static_cast<void*> (this));

JS_AddExtraGCRootsTracer(m_ScriptInterface->GetGeneralJSContext(), Trace, this);		JS_AddExtraGCRootsTracer(m_ScriptInterface->GetGeneralJSContext(), Trace, this);

ScriptRequest rq(m_ScriptInterface);		{
		ScriptRequest simrq(simInterface);
		// Register the sim globals for easy & explicit access. Mark it replaceable for hotloading.
		JS::RootedValue global(rq.cx, simrq.globalValue());
		m_ScriptInterface->SetGlobal("Sim", global, true);
		JS::RootedValue scope(rq.cx, JS::ObjectValue(*simrq.nativeScope.get()));
		m_ScriptInterface->SetGlobal("SimEngine", scope, true);
		}

#define REGISTER_FUNC_NAME(func, name) \		#define REGISTER_FUNC_NAME(func, name) \
ScriptFunction::Register<&CAIWorker::func, ScriptFunction::ObjectFromCBData<CAIWorker>>(rq, name);		ScriptFunction::Register<&CAIWorker::func, ScriptFunction::ObjectFromCBData<CAIWorker>>(rq, name);

REGISTER_FUNC_NAME(PostCommand, "PostCommand");		REGISTER_FUNC_NAME(PostCommand, "PostCommand");
REGISTER_FUNC_NAME(LoadScripts, "IncludeModule");		REGISTER_FUNC_NAME(LoadScripts, "IncludeModule");
ScriptFunction::Register<QuitEngine>(rq, "Exit");		ScriptFunction::Register<QuitEngine>(rq, "Exit");

REGISTER_FUNC_NAME(ComputePathScript, "ComputePath");		REGISTER_FUNC_NAME(ComputePathScript, "ComputePath");

REGISTER_FUNC_NAME(DumpImage, "DumpImage");		REGISTER_FUNC_NAME(DumpImage, "DumpImage");
REGISTER_FUNC_NAME(GetTemplate, "GetTemplate");		REGISTER_FUNC_NAME(GetTemplate, "GetTemplate");

#undef REGISTER_FUNC_NAME		#undef REGISTER_FUNC_NAME

JSI_VFS::RegisterScriptFunctions_Simulation(rq);		JSI_VFS::RegisterScriptFunctions_Simulation(rq);

// Globalscripts may use VFS script functions		// Globalscripts may use VFS script functions
m_ScriptInterface->LoadGlobalScripts();		m_ScriptInterface->LoadGlobalScripts();
}

~CAIWorker()
{
JS_RemoveExtraGCRootsTracer(m_ScriptInterface->GetGeneralJSContext(), Trace, this);
}		}

bool HasLoadedEntityTemplates() const { return m_HasLoadedEntityTemplates; }		bool HasLoadedEntityTemplates() const { return m_HasLoadedEntityTemplates; }

bool LoadScripts(const std::wstring& moduleName)		bool LoadScripts(const std::wstring& moduleName)
{		{
// Ignore modules that are already loaded		// Ignore modules that are already loaded
if (m_LoadedModules.find(moduleName) != m_LoadedModules.end())		if (m_LoadedModules.find(moduleName) != m_LoadedModules.end())
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if (m_HasSharedComponent && m_Players[i]->m_UseSharedComponent)		if (m_HasSharedComponent && m_Players[i]->m_UseSharedComponent)
m_Players[i]->Run(state, m_Players[i]->m_Player, m_SharedAIObj);		m_Players[i]->Run(state, m_Players[i]->m_Player, m_SharedAIObj);
else		else
m_Players[i]->Run(state, m_Players[i]->m_Player);		m_Players[i]->Run(state, m_Players[i]->m_Player);
}		}
}		}

// Take care to keep this declaration before heap rooted members. Destructors of heap rooted
// members have to be called before the context destructor.
shared_ptr<ScriptContext> m_ScriptContext;

shared_ptr<ScriptInterface> m_ScriptInterface;		shared_ptr<ScriptInterface> m_ScriptInterface;
boost::rand48 m_RNG;		boost::rand48 m_RNG;
u32 m_TurnNum;		u32 m_TurnNum;

JS::PersistentRootedValue m_EntityTemplates;		JS::PersistentRootedValue m_EntityTemplates;
bool m_HasLoadedEntityTemplates;		bool m_HasLoadedEntityTemplates;

std::map<VfsPath, JS::Heap<JS::Value> > m_PlayerMetadata;		std::map<VfsPath, JS::Heap<JS::Value> > m_PlayerMetadata;
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static std::string GetSchema()		static std::string GetSchema()
{		{
return "<a:component type='system'/><empty/>";		return "<a:component type='system'/><empty/>";
}		}

virtual void Init(const CParamNode& UNUSED(paramNode))		virtual void Init(const CParamNode& UNUSED(paramNode))
{		{
		m_Worker.Init(GetSimContext().GetScriptInterface());

m_TerritoriesDirtyID = 0;		m_TerritoriesDirtyID = 0;
m_TerritoriesDirtyBlinkingID = 0;		m_TerritoriesDirtyBlinkingID = 0;
m_JustDeserialized = false;		m_JustDeserialized = false;
}		}

virtual void Deinit()		virtual void Deinit()
{		{
}		}
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