archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-22 12:04:39 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8202261: (fc) FileChannel.map and RandomAccessFile.setLength should not preallocate space

Browse source 
Reviewed-by: bpb
This commit is contained in:
Alan Bateman 2018-04-26 09:04:18 +01:00
parent ccc74fdd60
commit 2df7aa7b9f
9 changed files with 101 additions and 144 deletions
Download patch file Download diff file Expand all files Collapse all files

16
src/java.base/windows/classes/sun/nio/ch/FileDispatcherImpl.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2018, 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
@ -78,6 +78,10 @@ class FileDispatcherImpl extends FileDispatcher {
return writev0(fd, address, len, fdAccess.getAppend(fd));
}
long seek(FileDescriptor fd, long offset) throws IOException {
return seek0(fd, offset);
}
int force(FileDescriptor fd, boolean metaData) throws IOException {
return force0(fd, metaData);
}
@ -86,11 +90,6 @@ class FileDispatcherImpl extends FileDispatcher {
return truncate0(fd, size);
}
int allocate(FileDescriptor fd, long size) throws IOException {
// truncate0() works for extending and truncating file size
return truncate0(fd, size);
}
long size(FileDescriptor fd) throws IOException {
return size0(fd);
}
@ -126,8 +125,7 @@ class FileDispatcherImpl extends FileDispatcher {
return true;
}
int setDirectIO(FileDescriptor fd, String path)
{
int setDirectIO(FileDescriptor fd, String path) {
int result = -1;
String filePath = path.substring(0, path.lastIndexOf(File.separator));
CharBuffer buffer = CharBuffer.allocate(filePath.length());
@ -178,6 +176,8 @@ class FileDispatcherImpl extends FileDispatcher {
static native long writev0(FileDescriptor fd, long address, int len, boolean append)
throws IOException;
static native long seek0(FileDescriptor fd, long offset) throws IOException;
static native int force0(FileDescriptor fd, boolean metaData)
throws IOException;