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8211859: Avoid initializing AtomicBoolean from RandomAccessFile

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Reviewed-by: alanb
This commit is contained in:
Claes Redestad 2018-10-09 14:30:06 +02:00
parent 1ac444ad87
commit 02a3be9920
1 changed files with 14 additions and 5 deletions
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17
src/java.base/share/classes/java/io/RandomAccessFile.java
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@ -71,7 +71,9 @@ public class RandomAccessFile implements DataOutput, DataInput, Closeable {
*/ */
private final String path; private final String path;
private final AtomicBoolean closed = new AtomicBoolean(false); private final Object closeLock = new Object();
private volatile boolean closed;
private static final int O_RDONLY = 1; private static final int O_RDONLY = 1;
private static final int O_RDWR = 2; private static final int O_RDWR = 2;
@ -301,7 +303,7 @@ public class RandomAccessFile implements DataOutput, DataInput, Closeable {
if (fc == null) { if (fc == null) {
this.channel = fc = FileChannelImpl.open(fd, path, true, this.channel = fc = FileChannelImpl.open(fd, path, true,
rw, false, this); rw, false, this);
if (closed.get()) { if (closed) {
try { try {
fc.close(); fc.close();
} catch (IOException ioe) { } catch (IOException ioe) {
@ -638,13 +640,20 @@ public class RandomAccessFile implements DataOutput, DataInput, Closeable {
* @spec JSR-51 * @spec JSR-51
*/ */
public void close() throws IOException { public void close() throws IOException {
if (!closed.compareAndSet(false, true)) { if (closed) {
// if compareAndSet() returns false closed was already true
return; return;
} }
synchronized (closeLock) {
if (closed) {
return;
}
closed = true;
}
FileChannel fc = channel; FileChannel fc = channel;
if (fc != null) { if (fc != null) {
// possible race with getChannel(), benign since
// FileChannel.close is final and idempotent
fc.close(); fc.close();
} }