mirror of
https://github.com/SquidDev-CC/CC-Tweaked
synced 2024-06-26 07:03:22 +00:00
6d383d005c
- Rename unload -> close to be a little more consistent - Make pollAndResetChanged be atomic, so we don't need to aquire a lock - Get the computer queue from the task owner, rather than a separate argument.
694 lines
26 KiB
Java
694 lines
26 KiB
Java
/*
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* This file is part of ComputerCraft - http://www.computercraft.info
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* Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
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* Send enquiries to dratcliffe@gmail.com
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*/
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package dan200.computercraft.core.lua;
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import dan200.computercraft.ComputerCraft;
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import dan200.computercraft.api.lua.*;
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import dan200.computercraft.core.computer.Computer;
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import dan200.computercraft.core.computer.ITask;
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import dan200.computercraft.core.computer.MainThread;
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import dan200.computercraft.core.tracking.Tracking;
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import dan200.computercraft.core.tracking.TrackingField;
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import dan200.computercraft.shared.util.ThreadUtils;
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import org.squiddev.cobalt.*;
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import org.squiddev.cobalt.compiler.CompileException;
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import org.squiddev.cobalt.compiler.LoadState;
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import org.squiddev.cobalt.debug.DebugFrame;
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import org.squiddev.cobalt.debug.DebugHandler;
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import org.squiddev.cobalt.debug.DebugState;
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import org.squiddev.cobalt.function.LibFunction;
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import org.squiddev.cobalt.function.LuaFunction;
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import org.squiddev.cobalt.function.VarArgFunction;
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import org.squiddev.cobalt.lib.*;
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import org.squiddev.cobalt.lib.platform.VoidResourceManipulator;
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import javax.annotation.Nonnull;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.IdentityHashMap;
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import java.util.Map;
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import java.util.concurrent.SynchronousQueue;
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import java.util.concurrent.ThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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import static org.squiddev.cobalt.Constants.NONE;
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import static org.squiddev.cobalt.ValueFactory.valueOf;
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import static org.squiddev.cobalt.ValueFactory.varargsOf;
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public class CobaltLuaMachine implements ILuaMachine
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{
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private static final ThreadPoolExecutor coroutines = new ThreadPoolExecutor(
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0, Integer.MAX_VALUE,
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5L, TimeUnit.MINUTES,
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new SynchronousQueue<>(),
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ThreadUtils.factory( "Coroutine" )
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);
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private final Computer m_computer;
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private LuaState m_state;
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private LuaTable m_globals;
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private LuaThread m_mainRoutine;
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private String m_eventFilter;
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private String m_softAbortMessage;
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private String m_hardAbortMessage;
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public CobaltLuaMachine( Computer computer )
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{
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m_computer = computer;
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// Create an environment to run in
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LuaState state = this.m_state = LuaState.builder()
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.resourceManipulator( new VoidResourceManipulator() )
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.debug( new DebugHandler()
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{
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private int count = 0;
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private boolean hasSoftAbort;
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@Override
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public void onInstruction( DebugState ds, DebugFrame di, int pc ) throws LuaError, UnwindThrowable
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{
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int count = ++this.count;
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if( count > 100000 )
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{
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if( m_hardAbortMessage != null ) throw HardAbortError.INSTANCE;
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this.count = 0;
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}
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else
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{
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handleSoftAbort();
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}
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super.onInstruction( ds, di, pc );
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}
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@Override
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public void poll() throws LuaError
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{
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if( m_hardAbortMessage != null ) throw HardAbortError.INSTANCE;
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handleSoftAbort();
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}
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private void handleSoftAbort() throws LuaError
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{
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// If the soft abort has been cleared then we can reset our flags and continue.
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String message = m_softAbortMessage;
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if( message == null )
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{
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hasSoftAbort = false;
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return;
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}
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if( hasSoftAbort && m_hardAbortMessage == null )
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{
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// If we have fired our soft abort, but we haven't been hard aborted then everything is OK.
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return;
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}
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hasSoftAbort = true;
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throw new LuaError( message );
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}
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} )
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.coroutineExecutor( command -> {
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Tracking.addValue( m_computer, TrackingField.COROUTINES_CREATED, 1 );
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coroutines.execute( () -> {
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try
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{
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command.run();
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}
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finally
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{
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Tracking.addValue( m_computer, TrackingField.COROUTINES_DISPOSED, 1 );
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}
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} );
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} )
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.build();
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m_globals = new LuaTable();
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state.setupThread( m_globals );
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// Add basic libraries
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m_globals.load( state, new BaseLib() );
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m_globals.load( state, new TableLib() );
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m_globals.load( state, new StringLib() );
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m_globals.load( state, new MathLib() );
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m_globals.load( state, new CoroutineLib() );
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m_globals.load( state, new Bit32Lib() );
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if( ComputerCraft.debug_enable ) m_globals.load( state, new DebugLib() );
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// Register custom load/loadstring provider which automatically adds prefixes.
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m_globals.rawset( "load", new PrefixWrapperFunction( m_globals.rawget( "load" ), 0 )) ;
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m_globals.rawset( "loadstring", new PrefixWrapperFunction( m_globals.rawget( "loadstring" ), 1 ) );
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// Remove globals we don't want to expose
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m_globals.rawset( "collectgarbage", Constants.NIL );
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m_globals.rawset( "dofile", Constants.NIL );
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m_globals.rawset( "loadfile", Constants.NIL );
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m_globals.rawset( "print", Constants.NIL );
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// Add version globals
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m_globals.rawset( "_VERSION", valueOf( "Lua 5.1" ) );
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m_globals.rawset( "_HOST", valueOf( computer.getAPIEnvironment().getComputerEnvironment().getHostString() ) );
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m_globals.rawset( "_CC_DEFAULT_SETTINGS", valueOf( ComputerCraft.default_computer_settings ) );
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if( ComputerCraft.disable_lua51_features )
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{
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m_globals.rawset( "_CC_DISABLE_LUA51_FEATURES", Constants.TRUE );
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}
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// Our main function will go here
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m_mainRoutine = null;
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m_eventFilter = null;
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m_softAbortMessage = null;
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m_hardAbortMessage = null;
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}
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@Override
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public void addAPI( ILuaAPI api )
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{
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// Add the methods of an API to the global table
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LuaTable table = wrapLuaObject( api );
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String[] names = api.getNames();
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for( String name : names )
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{
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m_globals.rawset( name, table );
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}
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}
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@Override
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public void loadBios( InputStream bios )
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{
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// Begin executing a file (ie, the bios)
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if( m_mainRoutine != null ) return;
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try
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{
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LuaFunction value = LoadState.load( m_state, bios, "@bios.lua", m_globals );
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m_mainRoutine = new LuaThread( m_state, value, m_globals );
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}
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catch( CompileException e )
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{
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close();
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}
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catch( IOException e )
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{
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ComputerCraft.log.warn( "Could not load bios.lua ", e );
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close();
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}
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}
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@Override
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public void handleEvent( String eventName, Object[] arguments )
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{
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if( m_mainRoutine == null ) return;
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if( m_eventFilter != null && eventName != null && !eventName.equals( m_eventFilter ) && !eventName.equals( "terminate" ) )
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{
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return;
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}
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try
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{
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Varargs resumeArgs = Constants.NONE;
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if( eventName != null )
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{
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resumeArgs = varargsOf( valueOf( eventName ), toValues( arguments ) );
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}
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Varargs results = LuaThread.run( m_mainRoutine, resumeArgs );
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if( m_hardAbortMessage != null ) throw new LuaError( m_hardAbortMessage );
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LuaValue filter = results.first();
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m_eventFilter = filter.isString() ? filter.toString() : null;
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if( m_mainRoutine.getStatus().equals( "dead" ) ) close();
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}
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catch( LuaError | HardAbortError | InterruptedException e )
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{
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close();
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ComputerCraft.log.warn( "Top level coroutine errored", e );
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}
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finally
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{
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m_softAbortMessage = null;
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m_hardAbortMessage = null;
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}
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}
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@Override
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public void softAbort( String abortMessage )
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{
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m_softAbortMessage = abortMessage;
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}
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@Override
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public void hardAbort( String abortMessage )
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{
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m_softAbortMessage = abortMessage;
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m_hardAbortMessage = abortMessage;
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}
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@Override
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public boolean saveState( OutputStream output )
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{
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return false;
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}
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@Override
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public boolean restoreState( InputStream input )
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{
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return false;
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}
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@Override
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public boolean isFinished()
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{
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return m_mainRoutine == null;
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}
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@Override
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public void close()
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{
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if( m_state == null ) return;
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m_state.abandon();
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m_mainRoutine = null;
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m_state = null;
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m_globals = null;
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}
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private LuaTable wrapLuaObject( ILuaObject object )
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{
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LuaTable table = new LuaTable();
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String[] methods = object.getMethodNames();
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for( int i = 0; i < methods.length; i++ )
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{
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if( methods[i] != null )
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{
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final int method = i;
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final ILuaObject apiObject = object;
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final String methodName = methods[i];
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table.rawset( methodName, new VarArgFunction()
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{
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@Override
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public Varargs invoke( final LuaState state, Varargs _args ) throws LuaError
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{
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Object[] arguments = toObjects( _args, 1 );
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Object[] results;
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try
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{
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results = apiObject.callMethod( new ILuaContext()
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{
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@Nonnull
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@Override
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public Object[] pullEvent( String filter ) throws LuaException, InterruptedException
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{
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Object[] results = pullEventRaw( filter );
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if( results.length >= 1 && results[0].equals( "terminate" ) )
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{
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throw new LuaException( "Terminated", 0 );
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}
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return results;
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}
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@Nonnull
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@Override
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public Object[] pullEventRaw( String filter ) throws InterruptedException
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{
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return yield( new Object[] { filter } );
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}
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@Nonnull
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@Override
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public Object[] yield( Object[] yieldArgs ) throws InterruptedException
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{
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try
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{
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Varargs results = LuaThread.yieldBlocking( state, toValues( yieldArgs ) );
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return toObjects( results, 1 );
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}
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catch( LuaError e )
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{
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throw new IllegalStateException( e );
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}
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}
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@Override
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public long issueMainThreadTask( @Nonnull final ILuaTask task ) throws LuaException
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{
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// Issue command
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final long taskID = MainThread.getUniqueTaskID();
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final ITask iTask = new ITask()
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{
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@Nonnull
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@Override
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public Computer getOwner()
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{
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return m_computer;
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}
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@Override
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public void execute()
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{
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try
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{
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Object[] results = task.execute();
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if( results != null )
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{
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Object[] eventArguments = new Object[results.length + 2];
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eventArguments[0] = taskID;
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eventArguments[1] = true;
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System.arraycopy( results, 0, eventArguments, 2, results.length );
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m_computer.queueEvent( "task_complete", eventArguments );
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}
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else
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{
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m_computer.queueEvent( "task_complete", new Object[] { taskID, true } );
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}
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}
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catch( LuaException e )
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{
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m_computer.queueEvent( "task_complete", new Object[] {
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taskID, false, e.getMessage()
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} );
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}
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catch( Throwable t )
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{
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if( ComputerCraft.logPeripheralErrors )
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{
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ComputerCraft.log.error( "Error running task", t );
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}
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m_computer.queueEvent( "task_complete", new Object[] {
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taskID, false, "Java Exception Thrown: " + t.toString()
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} );
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}
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}
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};
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if( MainThread.queueTask( iTask ) )
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{
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return taskID;
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}
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else
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{
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throw new LuaException( "Task limit exceeded" );
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}
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}
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@Override
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public Object[] executeMainThreadTask( @Nonnull final ILuaTask task ) throws LuaException, InterruptedException
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{
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// Issue task
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final long taskID = issueMainThreadTask( task );
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// Wait for response
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while( true )
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{
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Object[] response = pullEvent( "task_complete" );
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if( response.length >= 3 && response[1] instanceof Number && response[2] instanceof Boolean )
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{
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if( ((Number) response[1]).intValue() == taskID )
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{
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Object[] returnValues = new Object[response.length - 3];
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if( (Boolean) response[2] )
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{
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// Extract the return values from the event and return them
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System.arraycopy( response, 3, returnValues, 0, returnValues.length );
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return returnValues;
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}
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else
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{
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// Extract the error message from the event and raise it
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if( response.length >= 4 && response[3] instanceof String )
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{
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throw new LuaException( (String) response[3] );
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}
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else
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{
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throw new LuaException();
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}
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}
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}
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}
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}
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}
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}, method, arguments );
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}
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catch( InterruptedException e )
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{
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throw new OrphanedThread();
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}
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catch( LuaException e )
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{
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throw new LuaError( e.getMessage(), e.getLevel() );
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}
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catch( Throwable t )
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{
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if( ComputerCraft.logPeripheralErrors )
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{
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ComputerCraft.log.error( "Error calling " + methodName + " on " + apiObject, t );
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}
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throw new LuaError( "Java Exception Thrown: " + t.toString(), 0 );
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}
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return toValues( results );
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}
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} );
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}
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}
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return table;
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}
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private LuaValue toValue( Object object, Map<Object, LuaValue> values )
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{
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if( object == null )
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{
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return Constants.NIL;
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}
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else if( object instanceof Number )
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{
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double d = ((Number) object).doubleValue();
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return valueOf( d );
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}
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else if( object instanceof Boolean )
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{
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return valueOf( (Boolean) object );
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}
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else if( object instanceof String )
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{
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String s = object.toString();
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return valueOf( s );
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}
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else if( object instanceof byte[] )
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{
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byte[] b = (byte[]) object;
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return valueOf( Arrays.copyOf( b, b.length ) );
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}
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else if( object instanceof Map )
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{
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// Table:
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// Start remembering stuff
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if( values == null )
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{
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values = new IdentityHashMap<>();
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}
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else if( values.containsKey( object ) )
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{
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return values.get( object );
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}
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LuaTable table = new LuaTable();
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values.put( object, table );
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// Convert all keys
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for( Map.Entry<?, ?> pair : ((Map<?, ?>) object).entrySet() )
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{
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LuaValue key = toValue( pair.getKey(), values );
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LuaValue value = toValue( pair.getValue(), values );
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if( !key.isNil() && !value.isNil() )
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{
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table.rawset( key, value );
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}
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}
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return table;
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}
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else if( object instanceof ILuaObject )
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{
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return wrapLuaObject( (ILuaObject) object );
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}
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else
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{
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return Constants.NIL;
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}
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}
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private Varargs toValues( Object[] objects )
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{
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if( objects == null || objects.length == 0 )
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{
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return Constants.NONE;
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}
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LuaValue[] values = new LuaValue[objects.length];
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for( int i = 0; i < values.length; i++ )
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{
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Object object = objects[i];
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values[i] = toValue( object, null );
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}
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return varargsOf( values );
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}
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private static Object toObject( LuaValue value, Map<LuaValue, Object> objects )
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{
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switch( value.type() )
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{
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case Constants.TNIL:
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case Constants.TNONE:
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{
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return null;
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}
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case Constants.TINT:
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case Constants.TNUMBER:
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{
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return value.toDouble();
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}
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case Constants.TBOOLEAN:
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{
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return value.toBoolean();
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}
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case Constants.TSTRING:
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{
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return value.toString();
|
|
}
|
|
case Constants.TTABLE:
|
|
{
|
|
// Table:
|
|
// Start remembering stuff
|
|
if( objects == null )
|
|
{
|
|
objects = new IdentityHashMap<>();
|
|
}
|
|
else if( objects.containsKey( value ) )
|
|
{
|
|
return objects.get( value );
|
|
}
|
|
Map<Object, Object> table = new HashMap<>();
|
|
objects.put( value, table );
|
|
|
|
LuaTable luaTable = (LuaTable) value;
|
|
|
|
// Convert all keys
|
|
LuaValue k = Constants.NIL;
|
|
while( true )
|
|
{
|
|
Varargs keyValue;
|
|
try
|
|
{
|
|
keyValue = luaTable.next( k );
|
|
}
|
|
catch( LuaError luaError )
|
|
{
|
|
break;
|
|
}
|
|
k = keyValue.first();
|
|
if( k.isNil() )
|
|
{
|
|
break;
|
|
}
|
|
|
|
LuaValue v = keyValue.arg( 2 );
|
|
Object keyObject = toObject( k, objects );
|
|
Object valueObject = toObject( v, objects );
|
|
if( keyObject != null && valueObject != null )
|
|
{
|
|
table.put( keyObject, valueObject );
|
|
}
|
|
}
|
|
return table;
|
|
}
|
|
default:
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
}
|
|
|
|
private static Object[] toObjects( Varargs values, int startIdx )
|
|
{
|
|
int count = values.count();
|
|
Object[] objects = new Object[count - startIdx + 1];
|
|
for( int n = startIdx; n <= count; n++ )
|
|
{
|
|
int i = n - startIdx;
|
|
LuaValue value = values.arg( n );
|
|
objects[i] = toObject( value, null );
|
|
}
|
|
return objects;
|
|
}
|
|
|
|
private static class PrefixWrapperFunction extends VarArgFunction
|
|
{
|
|
private static final LuaString FUNCTION_STR = valueOf( "function" );
|
|
private static final LuaString EQ_STR = valueOf( "=" );
|
|
|
|
private final LibFunction underlying;
|
|
|
|
public PrefixWrapperFunction(LuaValue wrap, int opcode) {
|
|
LibFunction underlying = (LibFunction)wrap;
|
|
|
|
this.underlying = underlying;
|
|
this.opcode = opcode;
|
|
this.name = underlying.debugName();
|
|
this.env = underlying.getfenv();
|
|
}
|
|
|
|
@Override
|
|
public Varargs invoke( LuaState state, Varargs args ) throws LuaError, UnwindThrowable
|
|
{
|
|
switch( opcode )
|
|
{
|
|
case 0: // "load", // ( func [,chunkname] ) -> chunk | nil, msg
|
|
{
|
|
LuaValue func = args.arg( 1 ).checkFunction();
|
|
LuaString chunkname = args.arg( 2 ).optLuaString( FUNCTION_STR );
|
|
if( !chunkname.startsWith( '@' ) && !chunkname.startsWith( '=' ) )
|
|
{
|
|
chunkname = OperationHelper.concat( EQ_STR, chunkname );
|
|
}
|
|
return underlying.invoke(state, varargsOf(func, chunkname));
|
|
}
|
|
case 1: // "loadstring", // ( string [,chunkname] ) -> chunk | nil, msg
|
|
{
|
|
LuaString script = args.arg( 1 ).checkLuaString();
|
|
LuaString chunkname = args.arg( 2 ).optLuaString( script );
|
|
if( !chunkname.startsWith( '@' ) && !chunkname.startsWith( '=' ) )
|
|
{
|
|
chunkname = OperationHelper.concat( EQ_STR, chunkname );
|
|
}
|
|
return underlying.invoke(state, varargsOf(script, chunkname));
|
|
}
|
|
}
|
|
|
|
return NONE;
|
|
}
|
|
}
|
|
|
|
private static class HardAbortError extends Error
|
|
{
|
|
private static final long serialVersionUID = 7954092008586367501L;
|
|
|
|
public static final HardAbortError INSTANCE = new HardAbortError();
|
|
|
|
private HardAbortError()
|
|
{
|
|
super( "Hard Abort", null, true, false );
|
|
}
|
|
}
|
|
}
|