Mercurial Hosting > luan
view src/luan/LuanState.java @ 1230:034f2a0b3915
better gc
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 04 Apr 2018 14:54:29 -0600 |
parents | cb422386f6b5 |
children | d41997776788 |
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package luan; import java.io.Closeable; import java.io.IOException; import java.lang.ref.Reference; import java.lang.ref.WeakReference; import java.util.List; import java.util.ArrayList; import java.util.Map; import java.util.HashMap; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import luan.impl.LuanCompiler; import luan.modules.BasicLuan; import luan.modules.JavaLuan; public final class LuanState implements LuanCloneable { private static final Logger logger = LoggerFactory.getLogger(LuanState.class); public LuanJavaOk javaOk; private Map registry; private final List<Reference<Closeable>> onClose = new ArrayList<Reference<Closeable>>(); public boolean isLocked = false; public LuanState() { javaOk = new LuanJavaOk(); registry = new HashMap(); } private LuanState(LuanState luan) {} @Override public LuanState shallowClone() { return new LuanState(this); } @Override public void deepenClone(LuanCloneable dc,LuanCloner cloner) { LuanState clone = (LuanState)dc; clone.registry = cloner.clone(registry); clone.javaOk = (LuanJavaOk)cloner.clone(javaOk); if( cloner.type == LuanCloner.Type.INCREMENTAL ) isLocked = true; } public Map registry() { return registry; } public void onClose(Closeable c) { onClose.add(new WeakReference<Closeable>(c)); } public void close() { for( Reference<Closeable> ref : onClose ) { Closeable c = ref.get(); if( c != null ) { try { c.close(); } catch(IOException e) { logger.error(c.toString(),e); } } } onClose.clear(); } protected void finalize() throws Throwable { close(); } public final Object eval(String cmd,Object... args) throws LuanException { return Luan.load(cmd,"eval").call(this,args); } /* public final Object eval(String cmd,LuanTable env) throws LuanException { LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true); return fn.call(this); } */ public String toString(Object obj) throws LuanException { if( obj instanceof LuanTable ) { LuanTable tbl = (LuanTable)obj; return tbl.toString(this); } if( obj == null ) return "nil"; if( obj instanceof Number ) return Luan.toString((Number)obj); if( obj instanceof byte[] ) return "binary: " + Integer.toHexString(obj.hashCode()); return obj.toString(); } public Object index(Object obj,Object key) throws LuanException { if( obj instanceof LuanTable ) { LuanTable tbl = (LuanTable)obj; return tbl.get(this,key); } if( obj != null && javaOk.ok ) return JavaLuan.__index(this,obj,key); throw new LuanException("attempt to index a " + Luan.type(obj) + " value" ); } /* public Number checkNumber(Object obj) throws LuanException { if( obj instanceof Number ) return (Number)obj; throw new LuanException( "attempt to perform arithmetic on '"+context()+"' (a " + Luan.type(obj) + " value)" ); } */ public boolean isLessThan(Object o1,Object o2) throws LuanException { if( o1 instanceof Number && o2 instanceof Number ) { Number n1 = (Number)o1; Number n2 = (Number)o2; return n1.doubleValue() < n2.doubleValue(); } if( o1 instanceof String && o2 instanceof String ) { String s1 = (String)o1; String s2 = (String)o2; return s1.compareTo(s2) < 0; } LuanFunction fn = getBinHandler("__lt",o1,o2); if( fn != null ) return Luan.checkBoolean( Luan.first(fn.call(this,new Object[]{o1,o2})) ); throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) ); } public LuanFunction getBinHandler(String op,Object o1,Object o2) throws LuanException { if( o1 instanceof LuanTable ) { LuanFunction f1 = getHandlerFunction(op,(LuanTable)o1); if( f1 != null ) return f1; } return o2 instanceof LuanTable ? getHandlerFunction(op,(LuanTable)o2) : null; } public LuanFunction getHandlerFunction(String op,LuanTable t) throws LuanException { Object f = t.getHandler(this,op); if( f == null ) return null; return Luan.checkFunction(f); } }