public DatagramChannelImpl(SelectorProvider sp, FileDescriptor fd) throws IOException {
super(sp);
this.family =
Net.isIPv6Available() ? StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
this.fd = fd;
this.fdVal = IOUtil.fdVal(fd);
this.state = ST_UNCONNECTED;
this.localAddress = Net.localAddress(fd);
}
static void load() {
synchronized (Util.class) {
if (loaded) return;
loaded = true;
java.security.AccessController.doPrivileged(new sun.security.action.LoadLibraryAction("net"));
java.security.AccessController.doPrivileged(new sun.security.action.LoadLibraryAction("nio"));
// IOUtil must be initialized; Its native methods are called from
// other places in native nio code so they must be set up.
IOUtil.initIDs();
}
}
public DatagramChannelImpl(SelectorProvider sp) throws IOException {
super(sp);
ResourceManager.beforeUdpCreate();
try {
this.family =
Net.isIPv6Available() ? StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
this.fd = Net.socket(family, false);
this.fdVal = IOUtil.fdVal(fd);
this.state = ST_UNCONNECTED;
} catch (IOException ioe) {
ResourceManager.afterUdpClose();
throw ioe;
}
}
public DatagramChannelImpl(SelectorProvider sp, ProtocolFamily family) throws IOException {
super(sp);
if ((family != StandardProtocolFamily.INET) && (family != StandardProtocolFamily.INET6)) {
if (family == null) throw new NullPointerException("'family' is null");
else throw new UnsupportedOperationException("Protocol family not supported");
}
if (family == StandardProtocolFamily.INET6) {
if (!Net.isIPv6Available()) {
throw new UnsupportedOperationException("IPv6 not available");
}
}
this.family = family;
this.fd = Net.socket(family, false);
this.fdVal = IOUtil.fdVal(fd);
this.state = ST_UNCONNECTED;
}
public long read(ByteBuffer[] dsts) throws IOException {
if (dsts == null) throw new NullPointerException();
ensureOpen();
synchronized (lock) {
long n = 0;
try {
begin();
if (!isOpen()) return 0;
thread = NativeThread.current();
do {
n = IOUtil.read(fd, dsts, nd);
} while ((n == IOStatus.INTERRUPTED) && isOpen());
return IOStatus.normalize(n);
} finally {
thread = 0;
end((n > 0) || (n == IOStatus.UNAVAILABLE));
assert IOStatus.check(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);
}
}
}
protected void implConfigureBlocking(boolean block) throws IOException {
IOUtil.configureBlocking(fd, block);
}
SourceChannelImpl(SelectorProvider sp, FileDescriptor fd) {
super(sp);
this.fd = fd;
this.fdVal = IOUtil.fdVal(fd);
this.state = ST_INUSE;
}
static {
IOUtil.load();
initIDs();
}