protected void implCloseSelectableChannel() throws IOException {
synchronized (stateLock) {
if (state != ST_KILLED) nd.preClose(fd);
ResourceManager.afterUdpClose();
// if member of mulitcast group then invalidate all keys
if (registry != null) registry.invalidateAll();
long th;
if ((th = readerThread) != 0) NativeThread.signal(th);
if ((th = writerThread) != 0) NativeThread.signal(th);
if (!isRegistered()) kill();
}
}
public int send(ByteBuffer src, SocketAddress target) throws IOException {
if (src == null) throw new NullPointerException();
synchronized (writeLock) {
ensureOpen();
InetSocketAddress isa = Net.checkAddress(target);
InetAddress ia = isa.getAddress();
if (ia == null) throw new IOException("Target address not resolved");
synchronized (stateLock) {
if (!isConnected()) {
if (target == null) throw new NullPointerException();
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
if (ia.isMulticastAddress()) {
sm.checkMulticast(ia);
} else {
sm.checkConnect(ia.getHostAddress(), isa.getPort());
}
}
} else { // Connected case; Check address then write
if (!target.equals(remoteAddress)) {
throw new IllegalArgumentException("Connected address not equal to target address");
}
return write(src);
}
}
int n = 0;
try {
begin();
if (!isOpen()) return 0;
writerThread = NativeThread.current();
do {
n = send(fd, src, isa);
} while ((n == IOStatus.INTERRUPTED) && isOpen());
synchronized (stateLock) {
if (isOpen() && (localAddress == null)) {
localAddress = Net.localAddress(fd);
}
}
return IOStatus.normalize(n);
} finally {
writerThread = 0;
end((n > 0) || (n == IOStatus.UNAVAILABLE));
assert IOStatus.check(n);
}
}
}
public SocketAddress receive(ByteBuffer dst) throws IOException {
if (dst.isReadOnly()) throw new IllegalArgumentException("Read-only buffer");
if (dst == null) throw new NullPointerException();
synchronized (readLock) {
ensureOpen();
// Socket was not bound before attempting receive
if (localAddress() == null) bind(null);
int n = 0;
ByteBuffer bb = null;
try {
begin();
if (!isOpen()) return null;
SecurityManager security = System.getSecurityManager();
readerThread = NativeThread.current();
if (isConnected() || (security == null)) {
do {
n = receive(fd, dst);
} while ((n == IOStatus.INTERRUPTED) && isOpen());
if (n == IOStatus.UNAVAILABLE) return null;
} else {
bb = Util.getTemporaryDirectBuffer(dst.remaining());
for (; ; ) {
do {
n = receive(fd, bb);
} while ((n == IOStatus.INTERRUPTED) && isOpen());
if (n == IOStatus.UNAVAILABLE) return null;
InetSocketAddress isa = (InetSocketAddress) sender;
try {
security.checkAccept(isa.getAddress().getHostAddress(), isa.getPort());
} catch (SecurityException se) {
// Ignore packet
bb.clear();
n = 0;
continue;
}
bb.flip();
dst.put(bb);
break;
}
}
return sender;
} finally {
if (bb != null) Util.releaseTemporaryDirectBuffer(bb);
readerThread = 0;
end((n > 0) || (n == IOStatus.UNAVAILABLE));
assert IOStatus.check(n);
}
}
}
// package-private
int poll(int events, long timeout) throws IOException {
assert Thread.holdsLock(blockingLock()) && !isBlocking();
synchronized (readLock) {
int n = 0;
try {
begin();
synchronized (stateLock) {
if (!isOpen()) return 0;
readerThread = NativeThread.current();
}
n = Net.poll(fd, events, timeout);
} finally {
readerThread = 0;
end(n > 0);
}
return n;
}
}
public int write(ByteBuffer buf) throws IOException {
if (buf == null) throw new NullPointerException();
synchronized (writeLock) {
synchronized (stateLock) {
ensureOpen();
if (!isConnected()) throw new NotYetConnectedException();
}
int n = 0;
try {
begin();
if (!isOpen()) return 0;
writerThread = NativeThread.current();
do {
n = IOUtil.write(fd, buf, -1, nd);
} while ((n == IOStatus.INTERRUPTED) && isOpen());
return IOStatus.normalize(n);
} finally {
writerThread = 0;
end((n > 0) || (n == IOStatus.UNAVAILABLE));
assert IOStatus.check(n);
}
}
}
public long write(ByteBuffer[] srcs, int offset, int length) throws IOException {
if ((offset < 0) || (length < 0) || (offset > srcs.length - length))
throw new IndexOutOfBoundsException();
synchronized (writeLock) {
synchronized (stateLock) {
ensureOpen();
if (!isConnected()) throw new NotYetConnectedException();
}
long n = 0;
try {
begin();
if (!isOpen()) return 0;
writerThread = NativeThread.current();
do {
n = IOUtil.write(fd, srcs, offset, length, nd);
} while ((n == IOStatus.INTERRUPTED) && isOpen());
return IOStatus.normalize(n);
} finally {
writerThread = 0;
end((n > 0) || (n == IOStatus.UNAVAILABLE));
assert IOStatus.check(n);
}
}
}