Throw exceptions outside the native code
Rebased and cleaned-up based on the work by @normanmaurer Motivation: Currently, IOExceptions and ClosedChannelExceptions are thrown from inside the JNI methods. Instantiation of Java objects inside JNI code is an expensive operation, needless to say about filling stack trace for every instantiation of an exception. Modifications: Change most JNI methods to return a negative value on failure so that the exceptions are instantiated outside the native code. Also, pre-instantiate some commonly-thrown exceptions for better performance. Result: Performance gain
This commit is contained in:
Trustin Lee
parent
a77070fe9f
commit
aa42287e46
File diff suppressed because it is too large
Load Diff
@ -46,29 +46,29 @@ jint Java_io_netty_channel_epoll_Native_epollWait(JNIEnv * env, jclass clazz, ji
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void Java_io_netty_channel_epoll_Native_epollCtlAdd(JNIEnv * env, jclass clazz, jint efd, jint fd, jint flags, jint id);
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void Java_io_netty_channel_epoll_Native_epollCtlMod(JNIEnv * env, jclass clazz, jint efd, jint fd, jint flags, jint id);
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void Java_io_netty_channel_epoll_Native_epollCtlDel(JNIEnv * env, jclass clazz, jint efd, jint fd);
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jint Java_io_netty_channel_epoll_Native_write(JNIEnv * env, jclass clazz, jint fd, jobject jbuffer, jint pos, jint limit);
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jint Java_io_netty_channel_epoll_Native_writeAddress(JNIEnv * env, jclass clazz, jint fd, jlong address, jint pos, jint limit);
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jlong Java_io_netty_channel_epoll_Native_writev(JNIEnv * env, jclass clazz, jint fd, jobjectArray buffers, jint offset, jint length);
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jlong Java_io_netty_channel_epoll_Native_writevAddresses(JNIEnv * env, jclass clazz, jint fd, jlong memoryAddress, jint length);
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jint Java_io_netty_channel_epoll_Native_write0(JNIEnv * env, jclass clazz, jint fd, jobject jbuffer, jint pos, jint limit);
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jint Java_io_netty_channel_epoll_Native_writeAddress0(JNIEnv * env, jclass clazz, jint fd, jlong address, jint pos, jint limit);
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jlong Java_io_netty_channel_epoll_Native_writev0(JNIEnv * env, jclass clazz, jint fd, jobjectArray buffers, jint offset, jint length);
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jlong Java_io_netty_channel_epoll_Native_writevAddresses0(JNIEnv * env, jclass clazz, jint fd, jlong memoryAddress, jint length);
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jint Java_io_netty_channel_epoll_Native_sendTo(JNIEnv * env, jclass clazz, jint fd, jobject jbuffer, jint pos, jint limit, jbyteArray address, jint scopeId, jint port);
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jint Java_io_netty_channel_epoll_Native_sendToAddress(JNIEnv * env, jclass clazz, jint fd, jlong memoryAddress, jint pos, jint limit, jbyteArray address, jint scopeId, jint port);
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jint Java_io_netty_channel_epoll_Native_sendToAddresses(JNIEnv * env, jclass clazz, jint fd, jlong memoryAddress, jint length, jbyteArray address, jint scopeId, jint port);
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jint Java_io_netty_channel_epoll_Native_sendmmsg(JNIEnv * env, jclass clazz, jint fd, jobjectArray packets, jint offset, jint len);
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jint Java_io_netty_channel_epoll_Native_read(JNIEnv * env, jclass clazz, jint fd, jobject jbuffer, jint pos, jint limit);
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jint Java_io_netty_channel_epoll_Native_readAddress(JNIEnv * env, jclass clazz, jint fd, jlong address, jint pos, jint limit);
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jint Java_io_netty_channel_epoll_Native_read0(JNIEnv * env, jclass clazz, jint fd, jobject jbuffer, jint pos, jint limit);
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jint Java_io_netty_channel_epoll_Native_readAddress0(JNIEnv * env, jclass clazz, jint fd, jlong address, jint pos, jint limit);
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jobject Java_io_netty_channel_epoll_Native_recvFrom(JNIEnv * env, jclass clazz, jint fd, jobject jbuffer, jint pos, jint limit);
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jobject Java_io_netty_channel_epoll_Native_recvFromAddress(JNIEnv * env, jclass clazz, jint fd, jlong address, jint pos, jint limit);
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void JNICALL Java_io_netty_channel_epoll_Native_close(JNIEnv * env, jclass clazz, jint fd);
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void Java_io_netty_channel_epoll_Native_shutdown(JNIEnv * env, jclass clazz, jint fd, jboolean read, jboolean write);
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jint Java_io_netty_channel_epoll_Native_close0(JNIEnv * env, jclass clazz, jint fd);
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jint Java_io_netty_channel_epoll_Native_shutdown0(JNIEnv * env, jclass clazz, jint fd, jboolean read, jboolean write);
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jint Java_io_netty_channel_epoll_Native_socketStream(JNIEnv * env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_socketDgram(JNIEnv * env, jclass clazz);
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void Java_io_netty_channel_epoll_Native_bind(JNIEnv * env, jclass clazz, jint fd, jbyteArray address, jint scopeId, jint port);
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void Java_io_netty_channel_epoll_Native_listen(JNIEnv * env, jclass clazz, jint fd, jint backlog);
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jboolean Java_io_netty_channel_epoll_Native_connect(JNIEnv * env, jclass clazz, jint fd, jbyteArray address, jint scopeId, jint port);
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jboolean Java_io_netty_channel_epoll_Native_finishConnect(JNIEnv * env, jclass clazz, jint fd);
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jint Java_io_netty_channel_epoll_Native_accept(JNIEnv * env, jclass clazz, jint fd);
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jint Java_io_netty_channel_epoll_Native_bind(JNIEnv * env, jclass clazz, jint fd, jbyteArray address, jint scopeId, jint port);
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jint Java_io_netty_channel_epoll_Native_listen0(JNIEnv * env, jclass clazz, jint fd, jint backlog);
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jint Java_io_netty_channel_epoll_Native_connect(JNIEnv * env, jclass clazz, jint fd, jbyteArray address, jint scopeId, jint port);
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jint Java_io_netty_channel_epoll_Native_finishConnect0(JNIEnv * env, jclass clazz, jint fd);
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jint Java_io_netty_channel_epoll_Native_accept0(JNIEnv * env, jclass clazz, jint fd);
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jlong Java_io_netty_channel_epoll_Native_sendfile0(JNIEnv *env, jclass clazz, jint fd, jobject fileRegion, jlong base_off, jlong off, jlong len);
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jbyteArray Java_io_netty_channel_epoll_Native_remoteAddress0(JNIEnv * env, jclass clazz, jint fd);
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jbyteArray Java_io_netty_channel_epoll_Native_localAddress0(JNIEnv * env, jclass clazz, jint fd);
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@ -103,3 +103,10 @@ jstring Java_io_netty_channel_epoll_Native_kernelVersion(JNIEnv *env, jclass cla
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jint Java_io_netty_channel_epoll_Native_iovMax(JNIEnv *env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_uioMaxIov(JNIEnv *env, jclass clazz);
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jboolean Java_io_netty_channel_epoll_Native_isSupportingSendmmsg(JNIEnv *env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_errnoEBADF(JNIEnv *env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_errnoEPIPE(JNIEnv *env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_errnoEAGAIN(JNIEnv *env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_errnoEWOULDBLOCK(JNIEnv *env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_errnoEINPROGRESS(JNIEnv *env, jclass clazz);
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jstring Java_io_netty_channel_epoll_Native_strError(JNIEnv *env, jclass clazz, jint err);
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@ -18,6 +18,7 @@ package io.netty.channel.epoll;
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import io.netty.channel.ChannelException;
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import io.netty.channel.DefaultFileRegion;
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import io.netty.util.internal.EmptyArrays;
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import io.netty.util.internal.NativeLibraryLoader;
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import io.netty.util.internal.PlatformDependent;
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import io.netty.util.internal.SystemPropertyUtil;
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@ -28,6 +29,7 @@ import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.UnknownHostException;
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import java.nio.ByteBuffer;
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import java.nio.channels.ClosedChannelException;
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import java.util.Locale;
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/**
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@ -36,8 +38,6 @@ import java.util.Locale;
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* <strong>Internal usage only!</strong>
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*/
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final class Native {
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private static final byte[] IPV4_MAPPED_IPV6_PREFIX = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, (byte) 0xff, (byte) 0xff };
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static {
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String name = SystemPropertyUtil.get("os.name").toLowerCase(Locale.UK).trim();
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@ -56,6 +56,78 @@ final class Native {
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public static final int UIO_MAX_IOV = uioMaxIov();
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public static final boolean IS_SUPPORTING_SENDMMSG = isSupportingSendmmsg();
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private static final byte[] IPV4_MAPPED_IPV6_PREFIX = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, (byte) 0xff, (byte) 0xff };
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// As all our JNI methods return -errno on error we need to compare with the negative errno codes.
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private static final int ERRNO_EBADF_NEGATIVE = -errnoEBADF();
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private static final int ERRNO_EPIPE_NEGATIVE = -errnoEPIPE();
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private static final int ERRNO_EAGAIN_NEGATIVE = -errnoEAGAIN();
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private static final int ERRNO_EWOULDBLOCK_NEGATIVE = -errnoEWOULDBLOCK();
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private static final int ERRNO_EINPROGRESS_NEGATIVE = -errnoEINPROGRESS();
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/**
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* Holds the mappings for errno codes to String messages.
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* This eliminates the need to call back into JNI to get the right String message on an exception
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* and thus is faster.
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*
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* The array length of 1024 should be more then enough because errno.h only holds < 200 codes.
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*/
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private static final String[] ERRORS = new String[1024]; //
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// Pre-instantiated exceptions which does not need any stacktrace and
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// can be thrown multiple times for performance reasons.
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private static final ClosedChannelException CLOSED_CHANNEL_EXCEPTION;
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private static final IOException CONNECTION_RESET_EXCEPTION_WRITE;
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private static final IOException CONNECTION_RESET_EXCEPTION_WRITEV;
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private static final IOException CONNECTION_RESET_EXCEPTION_READ;
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private static final IOException CONNECTION_RESET_EXCEPTION_SENDFILE;
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private static final IOException CONNECTION_RESET_EXCEPTION_SENDTO;
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private static final IOException CONNECTION_RESET_EXCEPTION_SENDMSG;
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private static final IOException CONNECTION_RESET_EXCEPTION_SENDMMSG;
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static {
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for (int i = 0; i < ERRORS.length; i++) {
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// This is ok as strerror returns 'Unknown error i' when the message is not known.
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ERRORS[i] = strError(i);
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}
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CONNECTION_RESET_EXCEPTION_WRITE = newConnectionResetException("write");
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CONNECTION_RESET_EXCEPTION_WRITEV = newConnectionResetException("writev");
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CONNECTION_RESET_EXCEPTION_READ = newConnectionResetException("read");
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CONNECTION_RESET_EXCEPTION_SENDFILE = newConnectionResetException("sendfile");
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CONNECTION_RESET_EXCEPTION_SENDTO = newConnectionResetException("sendto");
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CONNECTION_RESET_EXCEPTION_SENDMSG = newConnectionResetException("sendmsg");
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CONNECTION_RESET_EXCEPTION_SENDMMSG = newConnectionResetException("sendmmsg");
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CLOSED_CHANNEL_EXCEPTION = new ClosedChannelException();
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CLOSED_CHANNEL_EXCEPTION.setStackTrace(EmptyArrays.EMPTY_STACK_TRACE);
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}
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private static IOException newConnectionResetException(String method) {
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IOException exception = newIOException(method, ERRNO_EPIPE_NEGATIVE);
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exception.setStackTrace(EmptyArrays.EMPTY_STACK_TRACE);
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return exception;
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}
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private static IOException newIOException(String method, int err) {
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return new IOException(method + "() failed: " + ERRORS[-err]);
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}
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private static int ioResult(String method, int err, IOException resetCause) throws IOException {
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// network stack saturated... try again later
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if (err == ERRNO_EAGAIN_NEGATIVE || err == ERRNO_EWOULDBLOCK_NEGATIVE) {
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return 0;
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}
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if (err == ERRNO_EPIPE_NEGATIVE) {
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throw resetCause;
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}
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if (err == ERRNO_EBADF_NEGATIVE) {
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throw CLOSED_CHANNEL_EXCEPTION;
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}
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// TODO: We could even go futher and use a pre-instanced IOException for the other error codes, but for
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// all other errors it may be better to just include a stacktrace.
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throw newIOException(method, err);
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}
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public static native int eventFd();
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public static native void eventFdWrite(int fd, long value);
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public static native void eventFdRead(int fd);
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@ -65,18 +137,89 @@ final class Native {
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public static native void epollCtlMod(int efd, final int fd, final int flags, final int id);
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public static native void epollCtlDel(int efd, final int fd);
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private static native int errnoEBADF();
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private static native int errnoEPIPE();
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private static native int errnoEAGAIN();
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private static native int errnoEWOULDBLOCK();
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private static native int errnoEINPROGRESS();
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private static native String strError(int err);
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// File-descriptor operations
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public static native void close(int fd) throws IOException;
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public static void close(int fd) throws IOException {
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int res = close0(fd);
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if (res < 0) {
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throw newIOException("close", res);
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}
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}
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public static native int write(int fd, ByteBuffer buf, int pos, int limit) throws IOException;
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public static native int writeAddress(int fd, long address, int pos, int limit) throws IOException;
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private static native int close0(int fd);
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public static native long writev(int fd, ByteBuffer[] buffers, int offset, int length) throws IOException;
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public static native long writevAddresses(int fd, long memoryAddress, int length)
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throws IOException;
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public static int write(int fd, ByteBuffer buf, int pos, int limit) throws IOException {
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int res = write0(fd, buf, pos, limit);
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if (res >= 0) {
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return res;
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}
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return ioResult("write", res, CONNECTION_RESET_EXCEPTION_WRITE);
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}
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public static native int read(int fd, ByteBuffer buf, int pos, int limit) throws IOException;
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public static native int readAddress(int fd, long address, int pos, int limit) throws IOException;
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private static native int write0(int fd, ByteBuffer buf, int pos, int limit);
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public static int writeAddress(int fd, long address, int pos, int limit) throws IOException {
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int res = writeAddress0(fd, address, pos, limit);
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if (res >= 0) {
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return res;
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}
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return ioResult("write", res, CONNECTION_RESET_EXCEPTION_WRITE);
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}
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private static native int writeAddress0(int fd, long address, int pos, int limit);
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public static long writev(int fd, ByteBuffer[] buffers, int offset, int length) throws IOException {
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long res = writev0(fd, buffers, offset, length);
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if (res >= 0) {
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return res;
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}
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return ioResult("writev", (int) res, CONNECTION_RESET_EXCEPTION_WRITEV);
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}
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private static native long writev0(int fd, ByteBuffer[] buffers, int offset, int length);
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public static long writevAddresses(int fd, long memoryAddress, int length)
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throws IOException {
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long res = writevAddresses0(fd, memoryAddress, length);
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if (res >= 0) {
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return res;
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}
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return ioResult("writev", (int) res, CONNECTION_RESET_EXCEPTION_WRITEV);
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}
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private static native long writevAddresses0(int fd, long memoryAddress, int length);
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public static int read(int fd, ByteBuffer buf, int pos, int limit) throws IOException {
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int res = read0(fd, buf, pos, limit);
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if (res > 0) {
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return res;
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}
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if (res == 0) {
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return -1;
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}
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return ioResult("read", res, CONNECTION_RESET_EXCEPTION_READ);
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}
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private static native int read0(int fd, ByteBuffer buf, int pos, int limit);
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public static int readAddress(int fd, long address, int pos, int limit) throws IOException {
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int res = readAddress0(fd, address, pos, limit);
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if (res > 0) {
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return res;
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}
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if (res == 0) {
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return -1;
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}
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return ioResult("read", res, CONNECTION_RESET_EXCEPTION_READ);
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}
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private static native int readAddress0(int fd, long address, int pos, int limit);
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public static long sendfile(
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int dest, DefaultFileRegion src, long baseOffset, long offset, long length) throws IOException {
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@ -84,7 +227,11 @@ final class Native {
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// the FileChannel field directly via JNI
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src.open();
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return sendfile0(dest, src, baseOffset, offset, length);
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long res = sendfile0(dest, src, baseOffset, offset, length);
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if (res >= 0) {
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return res;
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}
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return ioResult("sendfile", (int) res, CONNECTION_RESET_EXCEPTION_SENDFILE);
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}
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private static native long sendfile0(
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@ -104,11 +251,15 @@ final class Native {
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scopeId = 0;
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address = ipv4MappedIpv6Address(addr.getAddress());
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}
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return sendTo(fd, buf, pos, limit, address, scopeId, port);
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int res = sendTo0(fd, buf, pos, limit, address, scopeId, port);
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if (res >= 0) {
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return res;
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}
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return ioResult("sendfile", res, CONNECTION_RESET_EXCEPTION_SENDTO);
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}
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private static native int sendTo(
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int fd, ByteBuffer buf, int pos, int limit, byte[] address, int scopeId, int port) throws IOException;
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private static native int sendTo0(
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int fd, ByteBuffer buf, int pos, int limit, byte[] address, int scopeId, int port);
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public static int sendToAddress(
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int fd, long memoryAddress, int pos, int limit, InetAddress addr, int port) throws IOException {
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@ -124,11 +275,15 @@ final class Native {
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scopeId = 0;
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address = ipv4MappedIpv6Address(addr.getAddress());
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}
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return sendToAddress(fd, memoryAddress, pos, limit, address, scopeId, port);
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int res = sendToAddress0(fd, memoryAddress, pos, limit, address, scopeId, port);
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if (res >= 0) {
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return res;
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}
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return ioResult("sendto", res, CONNECTION_RESET_EXCEPTION_SENDTO);
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}
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private static native int sendToAddress(
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int fd, long memoryAddress, int pos, int limit, byte[] address, int scopeId, int port) throws IOException;
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private static native int sendToAddress0(
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int fd, long memoryAddress, int pos, int limit, byte[] address, int scopeId, int port);
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public static int sendToAddresses(
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int fd, long memoryAddress, int length, InetAddress addr, int port) throws IOException {
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@ -144,11 +299,15 @@ final class Native {
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scopeId = 0;
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address = ipv4MappedIpv6Address(addr.getAddress());
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}
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return sendToAddresses(fd, memoryAddress, length, address, scopeId, port);
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int res = sendToAddresses(fd, memoryAddress, length, address, scopeId, port);
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if (res >= 0) {
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return res;
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}
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return ioResult("sendmsg", res, CONNECTION_RESET_EXCEPTION_SENDMSG);
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}
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private static native int sendToAddresses(
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int fd, long memoryAddress, int length, byte[] address, int scopeId, int port) throws IOException;
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int fd, long memoryAddress, int length, byte[] address, int scopeId, int port);
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public static native EpollDatagramChannel.DatagramSocketAddress recvFrom(
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int fd, ByteBuffer buf, int pos, int limit) throws IOException;
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@ -156,50 +315,87 @@ final class Native {
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public static native EpollDatagramChannel.DatagramSocketAddress recvFromAddress(
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int fd, long memoryAddress, int pos, int limit) throws IOException;
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public static native int sendmmsg(
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int fd, NativeDatagramPacketArray.NativeDatagramPacket[] msgs, int offset, int len) throws IOException;
|
||||
public static int sendmmsg(
|
||||
int fd, NativeDatagramPacketArray.NativeDatagramPacket[] msgs, int offset, int len) throws IOException {
|
||||
int res = sendmmsg0(fd, msgs, offset, len);
|
||||
if (res >= 0) {
|
||||
return res;
|
||||
}
|
||||
return ioResult("sendmmsg", res, CONNECTION_RESET_EXCEPTION_SENDMMSG);
|
||||
}
|
||||
|
||||
private static native int sendmmsg0(
|
||||
int fd, NativeDatagramPacketArray.NativeDatagramPacket[] msgs, int offset, int len);
|
||||
|
||||
private static native boolean isSupportingSendmmsg();
|
||||
|
||||
// socket operations
|
||||
public static int socketStreamFd() {
|
||||
try {
|
||||
return socketStream();
|
||||
} catch (IOException e) {
|
||||
throw new ChannelException(e);
|
||||
int res = socketStream();
|
||||
if (res < 0) {
|
||||
throw new ChannelException(newIOException("socket", res));
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
public static int socketDgramFd() {
|
||||
try {
|
||||
return socketDgram();
|
||||
} catch (IOException e) {
|
||||
throw new ChannelException(e);
|
||||
int res = socketDgram();
|
||||
if (res < 0) {
|
||||
throw new ChannelException(newIOException("socket", res));
|
||||
}
|
||||
return res;
|
||||
}
|
||||
private static native int socketStream() throws IOException;
|
||||
private static native int socketDgram() throws IOException;
|
||||
|
||||
private static native int socketStream();
|
||||
private static native int socketDgram();
|
||||
|
||||
public static void bind(int fd, InetAddress addr, int port) throws IOException {
|
||||
NativeInetAddress address = toNativeInetAddress(addr);
|
||||
bind(fd, address.address, address.scopeId, port);
|
||||
int res = bind(fd, address.address, address.scopeId, port);
|
||||
if (res < 0) {
|
||||
throw newIOException("bind", res);
|
||||
}
|
||||
}
|
||||
|
||||
static byte[] ipv4MappedIpv6Address(byte[] ipv4) {
|
||||
byte[] address = new byte[16];
|
||||
System.arraycopy(IPV4_MAPPED_IPV6_PREFIX, 0, address, 0, IPV4_MAPPED_IPV6_PREFIX.length);
|
||||
System.arraycopy(ipv4, 0, address, 12, ipv4.length);
|
||||
return address;
|
||||
private static native int bind(int fd, byte[] address, int scopeId, int port);
|
||||
|
||||
public static void listen(int fd, int backlog) throws IOException {
|
||||
int res = listen0(fd, backlog);
|
||||
if (res < 0) {
|
||||
throw newIOException("listen", res);
|
||||
}
|
||||
}
|
||||
|
||||
public static native void bind(int fd, byte[] address, int scopeId, int port) throws IOException;
|
||||
public static native void listen(int fd, int backlog) throws IOException;
|
||||
private static native int listen0(int fd, int backlog);
|
||||
|
||||
public static boolean connect(int fd, InetAddress addr, int port) throws IOException {
|
||||
NativeInetAddress address = toNativeInetAddress(addr);
|
||||
return connect(fd, address.address, address.scopeId, port);
|
||||
int res = connect(fd, address.address, address.scopeId, port);
|
||||
if (res < 0) {
|
||||
if (res == ERRNO_EINPROGRESS_NEGATIVE) {
|
||||
// connect not complete yet need to wait for EPOLLOUT event
|
||||
return false;
|
||||
}
|
||||
throw newIOException("connect", res);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
public static native boolean connect(int fd, byte[] address, int scopeId, int port) throws IOException;
|
||||
public static native boolean finishConnect(int fd) throws IOException;
|
||||
|
||||
private static native int connect(int fd, byte[] address, int scopeId, int port);
|
||||
|
||||
public static boolean finishConnect(int fd) throws IOException {
|
||||
int res = finishConnect0(fd);
|
||||
if (res < 0) {
|
||||
if (res == ERRNO_EINPROGRESS_NEGATIVE) {
|
||||
// connect still in progress
|
||||
return false;
|
||||
}
|
||||
throw newIOException("getsockopt", res);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
private static native int finishConnect0(int fd);
|
||||
|
||||
public static InetSocketAddress remoteAddress(int fd) {
|
||||
byte[] addr = remoteAddress0(fd);
|
||||
@ -256,8 +452,29 @@ final class Native {
|
||||
|
||||
private static native byte[] remoteAddress0(int fd);
|
||||
private static native byte[] localAddress0(int fd);
|
||||
public static native int accept(int fd) throws IOException;
|
||||
public static native void shutdown(int fd, boolean read, boolean write) throws IOException;
|
||||
|
||||
public static int accept(int fd) throws IOException {
|
||||
int res = accept0(fd);
|
||||
if (res >= 0) {
|
||||
return res;
|
||||
}
|
||||
if (res == ERRNO_EAGAIN_NEGATIVE || res == ERRNO_EWOULDBLOCK_NEGATIVE) {
|
||||
// Everything consumed so just return -1 here.
|
||||
return -1;
|
||||
}
|
||||
throw newIOException("accept", res);
|
||||
}
|
||||
|
||||
private static native int accept0(int fd);
|
||||
|
||||
public static void shutdown(int fd, boolean read, boolean write) throws IOException {
|
||||
int res = shutdown0(fd, read, write);
|
||||
if (res < 0) {
|
||||
throw newIOException("shutdown", res);
|
||||
}
|
||||
}
|
||||
|
||||
private static native int shutdown0(int fd, boolean read, boolean write);
|
||||
|
||||
// Socket option operations
|
||||
public static native int getReceiveBufferSize(int fd);
|
||||
@ -298,6 +515,13 @@ final class Native {
|
||||
}
|
||||
}
|
||||
|
||||
static byte[] ipv4MappedIpv6Address(byte[] ipv4) {
|
||||
byte[] address = new byte[16];
|
||||
System.arraycopy(IPV4_MAPPED_IPV6_PREFIX, 0, address, 0, IPV4_MAPPED_IPV6_PREFIX.length);
|
||||
System.arraycopy(ipv4, 0, address, 12, ipv4.length);
|
||||
return address;
|
||||
}
|
||||
|
||||
private static class NativeInetAddress {
|
||||
final byte[] address;
|
||||
final int scopeId;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user