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8284161: Implementation of Virtual Threads (Preview)
Co-authored-by: Ron Pressler <rpressler@openjdk.org> Co-authored-by: Alan Bateman <alanb@openjdk.org> Co-authored-by: Erik Österlund <eosterlund@openjdk.org> Co-authored-by: Andrew Haley <aph@openjdk.org> Co-authored-by: Rickard Bäckman <rbackman@openjdk.org> Co-authored-by: Markus Grönlund <mgronlun@openjdk.org> Co-authored-by: Leonid Mesnik <lmesnik@openjdk.org> Co-authored-by: Serguei Spitsyn <sspitsyn@openjdk.org> Co-authored-by: Chris Plummer <cjplummer@openjdk.org> Co-authored-by: Coleen Phillimore <coleenp@openjdk.org> Co-authored-by: Robbin Ehn <rehn@openjdk.org> Co-authored-by: Stefan Karlsson <stefank@openjdk.org> Co-authored-by: Thomas Schatzl <tschatzl@openjdk.org> Co-authored-by: Sergey Kuksenko <skuksenko@openjdk.org> Reviewed-by: lancea, eosterlund, rehn, sspitsyn, stefank, tschatzl, dfuchs, lmesnik, dcubed, kevinw, amenkov, dlong, mchung, psandoz, bpb, coleenp, smarks, egahlin, mseledtsov, coffeys, darcy
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5212535a27
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1133 changed files with 95935 additions and 8335 deletions
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 1996, 2021, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 1996, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -28,9 +28,9 @@ package java.io;
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import java.nio.CharBuffer;
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import java.nio.charset.Charset;
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import java.nio.charset.CharsetEncoder;
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import jdk.internal.misc.InternalLock;
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import sun.nio.cs.StreamEncoder;
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/**
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* An OutputStreamWriter is a bridge from character streams to byte streams:
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* Characters written to it are encoded into bytes using a specified {@link
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@ -74,9 +74,22 @@ import sun.nio.cs.StreamEncoder;
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*/
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public class OutputStreamWriter extends Writer {
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private final StreamEncoder se;
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/**
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* Return the lock object for the given writer's stream encoder.
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* If the writer type is trusted then an internal lock can be used. If the
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* writer type is not trusted then the writer object is the lock.
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*/
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private static Object lockFor(OutputStreamWriter writer) {
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Class<?> clazz = writer.getClass();
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if (clazz == OutputStreamWriter.class || clazz == FileWriter.class) {
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return InternalLock.newLockOr(writer);
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} else {
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return writer;
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}
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}
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/**
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* Creates an OutputStreamWriter that uses the named charset.
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*
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@ -95,7 +108,7 @@ public class OutputStreamWriter extends Writer {
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super(out);
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if (charsetName == null)
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throw new NullPointerException("charsetName");
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se = StreamEncoder.forOutputStreamWriter(out, this, charsetName);
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se = StreamEncoder.forOutputStreamWriter(out, lockFor(this), charsetName);
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}
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/**
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@ -108,7 +121,7 @@ public class OutputStreamWriter extends Writer {
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*/
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public OutputStreamWriter(OutputStream out) {
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super(out);
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se = StreamEncoder.forOutputStreamWriter(out, this,
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se = StreamEncoder.forOutputStreamWriter(out, lockFor(this),
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out instanceof PrintStream ps ? ps.charset() : Charset.defaultCharset());
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}
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@ -127,7 +140,7 @@ public class OutputStreamWriter extends Writer {
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super(out);
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if (cs == null)
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throw new NullPointerException("charset");
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se = StreamEncoder.forOutputStreamWriter(out, this, cs);
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se = StreamEncoder.forOutputStreamWriter(out, lockFor(this), cs);
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}
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/**
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@ -145,7 +158,7 @@ public class OutputStreamWriter extends Writer {
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super(out);
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if (enc == null)
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throw new NullPointerException("charset encoder");
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se = StreamEncoder.forOutputStreamWriter(out, this, enc);
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se = StreamEncoder.forOutputStreamWriter(out, lockFor(this), enc);
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}
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/**
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