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8351458: (ch) Move preClose to UnixDispatcher #2051

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19 changes: 2 additions & 17 deletions src/java.base/share/classes/sun/nio/ch/DatagramChannelImpl.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2025, 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
Expand Down Expand Up @@ -1864,22 +1864,7 @@ private void implCloseBlockingMode() throws IOException {
registry.invalidateAll();

if (!tryClose()) {
long reader = readerThread;
long writer = writerThread;
if (reader != 0 || writer != 0) {
if (NativeThread.isVirtualThread(reader)
|| NativeThread.isVirtualThread(writer)) {
Poller.stopPoll(fdVal);
}
if (NativeThread.isNativeThread(reader)
|| NativeThread.isNativeThread(writer)) {
nd.preClose(fd);
if (NativeThread.isNativeThread(reader))
NativeThread.signal(reader);
if (NativeThread.isNativeThread(writer))
NativeThread.signal(writer);
}
}
nd.preClose(fd, readerThread, writerThread);
}
}
}
Expand Down
32 changes: 26 additions & 6 deletions src/java.base/share/classes/sun/nio/ch/NativeDispatcher.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2025, 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
Expand Down Expand Up @@ -27,13 +27,16 @@

import java.io.FileDescriptor;
import java.io.IOException;
import jdk.internal.access.JavaIOFileDescriptorAccess;
import jdk.internal.access.SharedSecrets;

/**
* Allows different platforms to call different native methods
* for read and write operations.
*/

abstract class NativeDispatcher {
private static final JavaIOFileDescriptorAccess JIOFDA = SharedSecrets.getJavaIOFileDescriptorAccess();

abstract int read(FileDescriptor fd, long address, int len)
throws IOException;
Expand Down Expand Up @@ -69,11 +72,28 @@ abstract long writev(FileDescriptor fd, long address, int len)

abstract void close(FileDescriptor fd) throws IOException;

// Prepare the given fd for closing by duping it to a known internal fd
// that's already closed. This is necessary on some operating systems
// (Solaris and Linux) to prevent fd recycling.
//
void preClose(FileDescriptor fd) throws IOException {
/**
* Prepare the given file descriptor for closing. If a virtual thread is blocked
* on the file descriptor then it is unparked so that it stops polling. On Unix systems,
* if a platform thread is blocked on the file descriptor then the file descriptor is
* dup'ed to a special fd and the thread signalled so that the syscall fails with EINTR.
*/
final void preClose(FileDescriptor fd, long reader, long writer) throws IOException {
if (NativeThread.isVirtualThread(reader) || NativeThread.isVirtualThread(writer)) {
int fdVal = JIOFDA.get(fd);
Poller.stopPoll(fdVal);
}
if (NativeThread.isNativeThread(reader) || NativeThread.isNativeThread(writer)) {
implPreClose(fd, reader, writer);
}
}

/**
* This method does nothing by default. On Unix systems the file descriptor is dup'ed
* to a special fd and native threads signalled.
*/

void implPreClose(FileDescriptor fd, long reader, long writer) throws IOException {
// Do nothing by default; this is only needed on Unix
}

Expand Down
17 changes: 2 additions & 15 deletions src/java.base/share/classes/sun/nio/ch/NioSocketImpl.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2019, 2025, 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
Expand Down Expand Up @@ -900,20 +900,7 @@ protected void close() throws IOException {
// then the socket is pre-closed and the thread(s) signalled. The
// last thread will close the file descriptor.
if (!tryClose()) {
long reader = readerThread;
long writer = writerThread;
if (NativeThread.isVirtualThread(reader)
|| NativeThread.isVirtualThread(writer)) {
Poller.stopPoll(fdVal(fd));
}
if (NativeThread.isNativeThread(reader)
|| NativeThread.isNativeThread(writer)) {
nd.preClose(fd);
if (NativeThread.isNativeThread(reader))
NativeThread.signal(reader);
if (NativeThread.isNativeThread(writer))
NativeThread.signal(writer);
}
nd.preClose(fd, readerThread, writerThread);
}
}
}
Expand Down
12 changes: 2 additions & 10 deletions src/java.base/share/classes/sun/nio/ch/ServerSocketChannelImpl.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2025, 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
Expand Down Expand Up @@ -604,15 +604,7 @@ private void implCloseBlockingMode() throws IOException {
assert state < ST_CLOSING;
state = ST_CLOSING;
if (!tryClose()) {
long th = thread;
if (th != 0) {
if (NativeThread.isVirtualThread(th)) {
Poller.stopPoll(fdVal);
} else {
nd.preClose(fd);
NativeThread.signal(th);
}
}
nd.preClose(fd, thread, 0);
}
}
}
Expand Down
18 changes: 3 additions & 15 deletions src/java.base/share/classes/sun/nio/ch/SocketChannelImpl.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2025, 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
Expand Down Expand Up @@ -1050,20 +1050,8 @@ private void implCloseBlockingMode() throws IOException {
} catch (IOException ignore) { }
}

long reader = readerThread;
long writer = writerThread;
if (NativeThread.isVirtualThread(reader)
|| NativeThread.isVirtualThread(writer)) {
Poller.stopPoll(fdVal);
}
if (NativeThread.isNativeThread(reader)
|| NativeThread.isNativeThread(writer)) {
nd.preClose(fd);
if (NativeThread.isNativeThread(reader))
NativeThread.signal(reader);
if (NativeThread.isNativeThread(writer))
NativeThread.signal(writer);
}
// prepare file descriptor for closing
nd.preClose(fd, readerThread, writerThread);
}
}
}
Expand Down
25 changes: 11 additions & 14 deletions src/java.base/unix/classes/sun/nio/ch/DatagramDispatcher.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2025, 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
Expand Down Expand Up @@ -39,46 +39,43 @@ class DatagramDispatcher extends UnixDispatcher {
IOUtil.load();
}

@Override
int read(FileDescriptor fd, long address, int len) throws IOException {
return read0(fd, address, len);
}

@Override
long readv(FileDescriptor fd, long address, int len) throws IOException {
return readv0(fd, address, len);
}

@Override
int write(FileDescriptor fd, long address, int len) throws IOException {
return write0(fd, address, len);
}

@Override
long writev(FileDescriptor fd, long address, int len) throws IOException {
return writev0(fd, address, len);
}

void close(FileDescriptor fd) throws IOException {
close0(fd);
}

void preClose(FileDescriptor fd) throws IOException {
preClose0(fd);
}

@Override
void dup(FileDescriptor fd1, FileDescriptor fd2) throws IOException {
dup0(fd1, fd2);
}

static native int read0(FileDescriptor fd, long address, int len)
private static native int read0(FileDescriptor fd, long address, int len)
throws IOException;

static native long readv0(FileDescriptor fd, long address, int len)
private static native long readv0(FileDescriptor fd, long address, int len)
throws IOException;

static native int write0(FileDescriptor fd, long address, int len)
private static native int write0(FileDescriptor fd, long address, int len)
throws IOException;

static native long writev0(FileDescriptor fd, long address, int len)
private static native long writev0(FileDescriptor fd, long address, int len)
throws IOException;

static native void dup0(FileDescriptor fd1, FileDescriptor fd2)
private static native void dup0(FileDescriptor fd1, FileDescriptor fd2)
throws IOException;
}
14 changes: 3 additions & 11 deletions src/java.base/unix/classes/sun/nio/ch/SinkChannelImpl.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2025, 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
Expand Down Expand Up @@ -42,7 +42,7 @@ class SinkChannelImpl
implements SelChImpl
{
// Used to make native read and write calls
private static final NativeDispatcher nd = new FileDispatcherImpl();
private static final NativeDispatcher nd = new SocketDispatcher();

// The file descriptor associated with this channel
private final FileDescriptor fd;
Expand Down Expand Up @@ -152,15 +152,7 @@ private void implCloseBlockingMode() throws IOException {
assert state < ST_CLOSING;
state = ST_CLOSING;
if (!tryClose()) {
long th = thread;
if (th != 0) {
if (NativeThread.isVirtualThread(th)) {
Poller.stopPoll(fdVal);
} else {
nd.preClose(fd);
NativeThread.signal(th);
}
}
nd.preClose(fd, thread, 0);
}
}
}
Expand Down
18 changes: 7 additions & 11 deletions src/java.base/unix/classes/sun/nio/ch/SocketDispatcher.java
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2025, 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
Expand Down Expand Up @@ -43,6 +43,7 @@ class SocketDispatcher extends UnixDispatcher {
* @throws sun.net.ConnectionResetException if connection reset is detected
* @throws IOException if another I/O error occurs
*/
@Override
int read(FileDescriptor fd, long address, int len) throws IOException {
return read0(fd, address, len);
}
Expand All @@ -54,26 +55,21 @@ int read(FileDescriptor fd, long address, int len) throws IOException {
* @throws sun.net.ConnectionResetException if connection reset is detected
* @throws IOException if another I/O error occurs
*/
@Override
long readv(FileDescriptor fd, long address, int len) throws IOException {
return readv0(fd, address, len);
}

@Override
int write(FileDescriptor fd, long address, int len) throws IOException {
return write0(fd, address, len);
}

@Override
long writev(FileDescriptor fd, long address, int len) throws IOException {
return writev0(fd, address, len);
}

void close(FileDescriptor fd) throws IOException {
close0(fd);
}

void preClose(FileDescriptor fd) throws IOException {
preClose0(fd);
}

// -- Native methods --

private static native int read0(FileDescriptor fd, long address, int len)
Expand All @@ -82,10 +78,10 @@ private static native int read0(FileDescriptor fd, long address, int len)
private static native long readv0(FileDescriptor fd, long address, int len)
throws IOException;

static native int write0(FileDescriptor fd, long address, int len)
private static native int write0(FileDescriptor fd, long address, int len)
throws IOException;

static native long writev0(FileDescriptor fd, long address, int len)
private static native long writev0(FileDescriptor fd, long address, int len)
throws IOException;

static {
Expand Down
14 changes: 3 additions & 11 deletions src/java.base/unix/classes/sun/nio/ch/SourceChannelImpl.java
View file
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2025, 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
Expand Down Expand Up @@ -42,7 +42,7 @@ class SourceChannelImpl
implements SelChImpl
{
// Used to make native read and write calls
private static final NativeDispatcher nd = new FileDispatcherImpl();
private static final NativeDispatcher nd = new SocketDispatcher();

// The file descriptor associated with this channel
private final FileDescriptor fd;
Expand Down Expand Up @@ -152,15 +152,7 @@ private void implCloseBlockingMode() throws IOException {
assert state < ST_CLOSING;
state = ST_CLOSING;
if (!tryClose()) {
long th = thread;
if (th != 0) {
if (NativeThread.isVirtualThread(th)) {
Poller.stopPoll(fdVal);
} else {
nd.preClose(fd);
NativeThread.signal(th);
}
}
nd.preClose(fd, thread, 0);
}
}
}
Expand Down
14 changes: 10 additions & 4 deletions src/java.base/unix/classes/sun/nio/ch/UnixDispatcher.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2022, 2025, 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
Expand Down Expand Up @@ -30,17 +30,23 @@

abstract class UnixDispatcher extends NativeDispatcher {

@Override
void close(FileDescriptor fd) throws IOException {
close0(fd);
}

void preClose(FileDescriptor fd) throws IOException {
@Override
void implPreClose(FileDescriptor fd, long reader, long writer) throws IOException {
preClose0(fd);
if (NativeThread.isNativeThread(reader))
NativeThread.signal(reader);
if (NativeThread.isNativeThread(writer))
NativeThread.signal(writer);
}

static native void close0(FileDescriptor fd) throws IOException;
private static native void close0(FileDescriptor fd) throws IOException;

static native void preClose0(FileDescriptor fd) throws IOException;
private static native void preClose0(FileDescriptor fd) throws IOException;

static native void init();

Expand Down
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