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8329593: Drop adjustments to target parallelism when virtual threads do I/O on files opened for buffered I/O

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Reviewed-by: bpb, jpai
This commit is contained in:
Alan Bateman 2024-04-23 16:10:13 +00:00
parent b07e1531b3
commit 412e306d81
28 changed files with 461 additions and 870 deletions
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72
src/java.base/share/classes/java/lang/Process.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1995, 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1995, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -25,6 +25,7 @@
package java.lang;
import jdk.internal.misc.Blocker;
import jdk.internal.util.StaticProperty;
import java.io.*;
@ -839,6 +840,75 @@ public abstract class Process {
return n - remaining;
}
@Override
public int read() throws IOException {
boolean attempted = Blocker.begin();
try {
return super.read();
} finally {
Blocker.end(attempted);
}
}
@Override
public int read(byte[] b) throws IOException {
boolean attempted = Blocker.begin();
try {
return super.read(b);
} finally {
Blocker.end(attempted);
}
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
boolean attempted = Blocker.begin();
try {
return super.read(b, off, len);
} finally {
Blocker.end(attempted);
}
}
}
/**
* An output stream for a subprocess pipe.
*/
static class PipeOutputStream extends FileOutputStream {
PipeOutputStream(FileDescriptor fd) {
super(fd);
}
@Override
public void write(int b) throws IOException {
boolean attempted = Blocker.begin();
try {
super.write(b);
} finally {
Blocker.end(attempted);
}
}
@Override
public void write(byte[] b) throws IOException {
boolean attempted = Blocker.begin();
try {
super.write(b);
} finally {
Blocker.end(attempted);
}
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
boolean attempted = Blocker.begin();
try {
super.write(b, off, len);
} finally {
Blocker.end(attempted);
}
}
}
/**