Package com.oracle.truffle.api.strings

Class TruffleString.AsNativeNode

java.lang.Object

com.oracle.truffle.api.nodes.Node

com.oracle.truffle.api.strings.TruffleString.AsNativeNode

All Implemented Interfaces:

NodeInterface, Cloneable

Enclosing class:

TruffleString

public abstract static class TruffleString.AsNativeNode
extends Node

Node to convert a potentially managed TruffleString to a native string.

Since:

23.0

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.truffle.api.nodes.Node

Node.Child, Node.Children

Method Summary

Modifier and Type	Method	Description
static TruffleString.AsNativeNode	create()	Create a new TruffleString.AsNativeNode.
abstract TruffleString	execute(TruffleString a, NativeAllocator allocator, TruffleString.Encoding expectedEncoding, boolean useCompaction, boolean cacheResult)	Convert a potentially managed TruffleString to a native string.
static TruffleString.AsNativeNode	getUncached()	Get the uncached version of TruffleString.AsNativeNode.

Methods inherited from class com.oracle.truffle.api.nodes.Node

accept, adoptChildren, atomic, atomic, copy, deepCopy, getChildren, getCost, getDebugProperties, getDescription, getEncapsulatingSourceSection, getLock, getParent, getRootNode, getSourceSection, insert, insert, isAdoptable, isSafelyReplaceableBy, notifyInserted, onReplace, replace, replace, reportPolymorphicSpecialize, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

execute

public abstract TruffleString execute(TruffleString a,
 NativeAllocator allocator,
 TruffleString.Encoding expectedEncoding,
 boolean useCompaction,
 boolean cacheResult)

Convert a potentially managed TruffleString to a native string. If the given string is native already, it is returned. Otherwise, a new string with a backing native buffer allocated via allocator is created and stored in the given managed string's internal transcoding cache, such that subsequent calls on the same string will return the same native string. This operation requires native access permissions (TruffleLanguage.Env#isNativeAccessAllowed()).

Parameters:

allocator - a function implementing NativeAllocator. This parameter is expected to be partial evaluation constant.

useCompaction - if set to true, TruffleString.Encoding.UTF_32 and TruffleString.Encoding.UTF_16 - encoded strings may be compacted also in the native representation. Otherwise, no string compaction is applied to the native string. This parameter is expected to be partial evaluation constant.

cacheResult - if set to true, the newly created native string will be cached in the given managed string's internal transcoding cache ring, guaranteeing that subsequent calls on the managed string return the same native string. Note that this ties the lifetime of the native string to that of the managed string. This parameter is expected to be partial evaluation constant.

Since:

23.0

create

public static TruffleString.AsNativeNode create()

Create a new TruffleString.AsNativeNode.

Since:

23.0

getUncached

public static TruffleString.AsNativeNode getUncached()

Get the uncached version of TruffleString.AsNativeNode.

Since:

23.0