org.apache.tomcat.jni.Status Java Examples

/**
 * Remove specified socket from the pollers. Must only be called from
 * {@link Poller#run()}.
 */
private void removeFromPoller(long socket) {
    if (log.isDebugEnabled()) {
        log.debug(sm.getString("endpoint.debug.pollerRemove",
                Long.valueOf(socket)));
    }
    int rv = -1;
    for (int i = 0; i < pollers.length; i++) {
        if (pollerSpace[i] < actualPollerSize) {
            rv = Poll.remove(pollers[i], socket);
            if (rv != Status.APR_NOTFOUND) {
                pollerSpace[i]++;
                connectionCount.decrementAndGet();
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("endpoint.debug.pollerRemoved",
                            Long.valueOf(socket)));
                }
                break;
            }
        }
    }
    timeouts.remove(socket);
}
 

/**
 * Remove specified socket from the pollers. Must only be called from
 * {@link Poller#run()}.
 */
private boolean removeFromPoller(long socket) {
    if (log.isDebugEnabled()) {
        log.debug(sm.getString("endpoint.debug.pollerRemove",
                Long.valueOf(socket)));
    }
    int rv = -1;
    for (int i = 0; i < pollers.length; i++) {
        if (pollerSpace[i] < actualPollerSize) {
            rv = Poll.remove(pollers[i], socket);
            if (rv != Status.APR_NOTFOUND) {
                pollerSpace[i]++;
                connectionCount.decrementAndGet();
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("endpoint.debug.pollerRemoved",
                            Long.valueOf(socket)));
                }
                break;
            }
        }
    }
    timeouts.remove(socket);
    return (rv == Status.APR_SUCCESS);
}
 

@Override
public int read(boolean block, byte[] bytes, int off, int len)
        throws IOException {
    if (!block) {
        Socket.optSet(socket, Socket.APR_SO_NONBLOCK, -1);
    }
    try {
        int result = Socket.recv(socket, bytes, off, len);
        if (result > 0) {
            return result;
        } else if (-result == Status.EAGAIN) {
            return 0;
        } else {
            throw new IOException(sm.getString("apr.read.error",
                    Integer.valueOf(-result)));
        }
    } finally {
        if (!block) {
            Socket.optSet(socket, Socket.APR_SO_NONBLOCK, 0);
        }
    }
}
 

@Override
public int read(boolean block, byte[] bytes, int off, int len)
        throws IOException {
    if (!block) {
        Socket.optSet(socket, Socket.APR_SO_NONBLOCK, -1);
    }
    try {
        int result = Socket.recv(socket, bytes, off, len);
        if (result > 0) {
            return result;
        } else if (-result == Status.EAGAIN) {
            return 0;
        } else {
            throw new IOException(sm.getString("apr.read.error",
                    Integer.valueOf(-result)));
        }
    } finally {
        if (!block) {
            Socket.optSet(socket, Socket.APR_SO_NONBLOCK, 0);
        }
    }
}
 

/**
 * Remove specified socket from the pollers. Must only be called from
 * {@link Poller#run()}.
 */
private boolean removeFromPoller(long socket) {
    if (log.isDebugEnabled()) {
        log.debug(sm.getString("endpoint.debug.pollerRemove",
                Long.valueOf(socket)));
    }
    int rv = -1;
    for (int i = 0; i < pollers.length; i++) {
        if (pollerSpace[i] < actualPollerSize) {
            rv = Poll.remove(pollers[i], socket);
            if (rv != Status.APR_NOTFOUND) {
                pollerSpace[i]++;
                connectionCount.decrementAndGet();
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("endpoint.debug.pollerRemoved",
                            Long.valueOf(socket)));
                }
                break;
            }
        }
    }
    timeouts.remove(socket);
    return (rv == Status.APR_SUCCESS);
}
 

/**
 * Add specified socket to one of the pollers. Must only be called from
 * {@link Poller#run()}.
 */
protected boolean addToPoller(long socket, int events) {
    int rv = -1;
    for (int i = 0; i < pollers.length; i++) {
        if (pollerSpace[i] > 0) {
            rv = Poll.add(pollers[i], socket, events);
            if (rv == Status.APR_SUCCESS) {
                pollerSpace[i]--;
                connectionCount.incrementAndGet();
                return true;
            }
        }
    }
    return false;
}
 

/**
 * Remove socket from the poller.
 *
 * @param data the sendfile data which should be removed
 */
protected void remove(SendfileData data) {
    int rv = Poll.remove(sendfilePollset, data.socket);
    if (rv == Status.APR_SUCCESS) {
        sendfileCount--;
    }
    sendfileData.remove(Long.valueOf(data.socket));
}
 

/**
 * Add specified socket to one of the pollers. Must only be called from
 * {@link Poller#run()}.
 */
protected boolean addToPoller(long socket, int events) {
    int rv = -1;
    for (int i = 0; i < pollers.length; i++) {
        if (pollerSpace[i] > 0) {
            rv = Poll.add(pollers[i], socket, events);
            if (rv == Status.APR_SUCCESS) {
                pollerSpace[i]--;
                connectionCount.incrementAndGet();
                return true;
            }
        }
    }
    return false;
}
 

/**
 * Allocate a new poller of the specified size.
 */
protected long allocatePoller(int size, long pool, int timeout) {
    try {
        return Poll.create(size, pool, 0, timeout * 1000);
    } catch (Error e) {
        if (Status.APR_STATUS_IS_EINVAL(e.getError())) {
            log.info(sm.getString("endpoint.poll.limitedpollsize", "" + size));
            return 0;
        } else {
            log.error(sm.getString("endpoint.poll.initfail"), e);
            return -1;
        }
    }
}
 

/**
 * Read at least the specified amount of bytes, and place them
 * in the input buffer.
 */
protected boolean readt(int n, boolean useAvailableData)
    throws IOException {

    if (useAvailableData && inputBuffer.remaining() == 0) {
        return false;
    }
    if (inputBuffer.capacity() - inputBuffer.limit() <=
            n - inputBuffer.remaining()) {
        inputBuffer.compact();
        inputBuffer.limit(inputBuffer.position());
        inputBuffer.position(0);
    }
    int nRead;
    while (inputBuffer.remaining() < n) {
        nRead = Socket.recvbb
            (socketWrapper.getSocket().longValue(), inputBuffer.limit(),
                inputBuffer.capacity() - inputBuffer.limit());
        if (nRead > 0) {
            inputBuffer.limit(inputBuffer.limit() + nRead);
        } else {
            if ((-nRead) == Status.ETIMEDOUT || (-nRead) == Status.TIMEUP) {
                return false;
            } else {
                throw new IOException(sm.getString("ajpprocessor.failedread"));
            }
        }
    }

    return true;

}
 

/**
 * Remove socket from the poller.
 *
 * @param data the sendfile data which should be removed
 */
protected void remove(SendfileData data) {
    int rv = Poll.remove(sendfilePollset, data.socket);
    if (rv == Status.APR_SUCCESS) {
        sendfileCount--;
    }
    sendfileData.remove(Long.valueOf(data.socket));
}
 

/**
 * Allocate a new poller of the specified size.
 * @param size The size
 * @param pool The pool from which the poller will be allocated
 * @param timeout The timeout
 * @return the poller pointer
 */
protected long allocatePoller(int size, long pool, int timeout) {
    try {
        return Poll.create(size, pool, 0, timeout * 1000);
    } catch (Error e) {
        if (Status.APR_STATUS_IS_EINVAL(e.getError())) {
            log.info(sm.getString("endpoint.poll.limitedpollsize", "" + size));
            return 0;
        } else {
            log.error(sm.getString("endpoint.poll.initfail"), e);
            return -1;
        }
    }
}
 

/**
 * Allocate a new poller of the specified size.
 */
protected long allocatePoller(int size, long pool, int timeout) {
    try {
        return Poll.create(size, pool, 0, timeout * 1000);
    } catch (Error e) {
        if (Status.APR_STATUS_IS_EINVAL(e.getError())) {
            log.info(sm.getString("endpoint.poll.limitedpollsize", "" + size));
            return 0;
        } else {
            log.error(sm.getString("endpoint.poll.initfail"), e);
            return -1;
        }
    }
}
 

/**
 * Read at least the specified amount of bytes, and place them
 * in the input buffer.
 */
protected boolean readt(int n, boolean useAvailableData)
    throws IOException {

    if (useAvailableData && inputBuffer.remaining() == 0) {
        return false;
    }
    if (inputBuffer.capacity() - inputBuffer.limit() <=
            n - inputBuffer.remaining()) {
        inputBuffer.compact();
        inputBuffer.limit(inputBuffer.position());
        inputBuffer.position(0);
    }
    int nRead;
    while (inputBuffer.remaining() < n) {
        nRead = Socket.recvbb
            (socketWrapper.getSocket().longValue(), inputBuffer.limit(),
                inputBuffer.capacity() - inputBuffer.limit());
        if (nRead > 0) {
            inputBuffer.limit(inputBuffer.limit() + nRead);
        } else {
            if ((-nRead) == Status.ETIMEDOUT || (-nRead) == Status.TIMEUP) {
                return false;
            } else {
                throw new IOException(sm.getString("ajpprocessor.failedread"));
            }
        }
    }

    return true;

}
 

/**
 * Remove socket from the poller.
 *
 * @param data the sendfile data which should be removed
 */
protected void remove(SendfileData data) {
    int rv = Poll.remove(sendfilePollset, data.socket);
    if (rv == Status.APR_SUCCESS) {
        sendfileCount--;
    }
    sendfileData.remove(Long.valueOf(data.socket));
}
 

/**
 * Add specified socket to one of the pollers. Must only be called from
 * {@link Poller#run()}.
 */
private boolean addToPoller(long socket, int events) {
    int rv = -1;
    for (int i = 0; i < pollers.length; i++) {
        if (pollerSpace[i] > 0) {
            rv = Poll.add(pollers[i], socket, events);
            if (rv == Status.APR_SUCCESS) {
                pollerSpace[i]--;
                connectionCount.incrementAndGet();
                return true;
            }
        }
    }
    return false;
}
 

@Override
protected int doRead(boolean block, byte[] b, int off, int len)
        throws IOException {

    if (closed) {
        throw new IOException(sm.getString("apr.closed", Long.valueOf(socket)));
    }

    Lock readLock = wrapper.getBlockingStatusReadLock();
    WriteLock writeLock = wrapper.getBlockingStatusWriteLock();

    boolean readDone = false;
    int result = 0;
    try {
        readLock.lock();
        if (wrapper.getBlockingStatus() == block) {
            result = Socket.recv(socket, b, off, len);
            readDone = true;
        }
    } finally {
        readLock.unlock();
    }

    if (!readDone) {
        try {
            writeLock.lock();
            wrapper.setBlockingStatus(block);
            // Set the current settings for this socket
            Socket.optSet(socket, Socket.APR_SO_NONBLOCK, (block ? 0 : 1));
            // Downgrade the lock
            try {
                readLock.lock();
                writeLock.unlock();
                result = Socket.recv(socket, b, off, len);
            } finally {
                readLock.unlock();
            }
        } finally {
            // Should have been released above but may not have been on some
            // exception paths
            if (writeLock.isHeldByCurrentThread()) {
                writeLock.unlock();
            }
        }
    }

    if (result > 0) {
        eagain = false;
        return result;
    } else if (-result == Status.EAGAIN) {
        eagain = true;
        return 0;
    } else if (-result == Status.APR_EGENERAL && wrapper.isSecure()) {
        // Not entirely sure why this is necessary. Testing to date has not
        // identified any issues with this but log it so it can be tracked
        // if it is suspected of causing issues in the future.
        if (log.isDebugEnabled()) {
            log.debug(sm.getString("apr.read.sslGeneralError",
                    Long.valueOf(socket), wrapper));
        }
        eagain = true;
        return 0;
    } else if (-result == Status.APR_EOF) {
        throw new EOFException(sm.getString("apr.clientAbort"));
    } else if ((OS.IS_WIN32 || OS.IS_WIN64) &&
            (-result == Status.APR_OS_START_SYSERR + 10053)) {
        // 10053 on Windows is connection aborted
        throw new EOFException(sm.getString("apr.clientAbort"));
    } else {
        throw new IOException(sm.getString("apr.read.error",
                Integer.valueOf(-result), Long.valueOf(socket), wrapper));
    }
}
 

private int doWriteInternal(byte[] b, int off, int len) throws IOException {

        int start = off;
        int left = len;
        int written;

        do {
            if (endpoint.isSSLEnabled()) {
                if (sslOutputBuffer.remaining() == 0) {
                    // Buffer was fully written last time around
                    sslOutputBuffer.clear();
                    if (left < SSL_OUTPUT_BUFFER_SIZE) {
                        sslOutputBuffer.put(b, start, left);
                    } else {
                        sslOutputBuffer.put(b, start, SSL_OUTPUT_BUFFER_SIZE);
                    }
                    sslOutputBuffer.flip();
                } else {
                    // Buffer still has data from previous attempt to write
                    // APR + SSL requires that exactly the same parameters are
                    // passed when re-attempting the write
                }
                written = Socket.sendb(socket, sslOutputBuffer,
                        sslOutputBuffer.position(), sslOutputBuffer.limit());
                if (written > 0) {
                    sslOutputBuffer.position(
                            sslOutputBuffer.position() + written);
                }
            } else {
                written = Socket.send(socket, b, start, left);
            }
            if (Status.APR_STATUS_IS_EAGAIN(-written)) {
                written = 0;
            } else if (-written == Status.APR_EOF) {
                throw new EOFException(sm.getString("apr.clientAbort"));
            } else if ((OS.IS_WIN32 || OS.IS_WIN64) &&
                    (-written == Status.APR_OS_START_SYSERR + 10053)) {
                // 10053 on Windows is connection aborted
                throw new EOFException(sm.getString("apr.clientAbort"));
            } else if (written < 0) {
                throw new IOException(sm.getString("apr.write.error",
                        Integer.valueOf(-written), Long.valueOf(socket), wrapper));
            }
            start += written;
            left -= written;
        } while (written > 0 && left > 0);

        if (left > 0) {
            endpoint.getPoller().add(socket, -1, false, true);
        }
        return len - left;
    }
 

/**
 * Add the sendfile data to the sendfile poller. Note that in most cases,
 * the initial non blocking calls to sendfile will return right away, and
 * will be handled asynchronously inside the kernel. As a result,
 * the poller will never be used.
 *
 * @param data containing the reference to the data which should be snet
 * @return true if all the data has been sent right away, and false
 *              otherwise
 */
public boolean add(SendfileData data) {
    // Initialize fd from data given
    try {
        data.fdpool = Socket.pool(data.socket);
        data.fd = File.open
            (data.fileName, File.APR_FOPEN_READ
             | File.APR_FOPEN_SENDFILE_ENABLED | File.APR_FOPEN_BINARY,
             0, data.fdpool);
        data.pos = data.start;
        // Set the socket to nonblocking mode
        Socket.timeoutSet(data.socket, 0);
        while (true) {
            long nw = Socket.sendfilen(data.socket, data.fd,
                                       data.pos, data.end - data.pos, 0);
            if (nw < 0) {
                if (!(-nw == Status.EAGAIN)) {
                    Pool.destroy(data.fdpool);
                    data.socket = 0;
                    return false;
                } else {
                    // Break the loop and add the socket to poller.
                    break;
                }
            } else {
                data.pos = data.pos + nw;
                if (data.pos >= data.end) {
                    // Entire file has been sent
                    Pool.destroy(data.fdpool);
                    // Set back socket to blocking mode
                    Socket.timeoutSet(
                            data.socket, getSoTimeout() * 1000);
                    return true;
                }
            }
        }
    } catch (Exception e) {
        log.warn(sm.getString("endpoint.sendfile.error"), e);
        return false;
    }
    // Add socket to the list. Newly added sockets will wait
    // at most for pollTime before being polled
    synchronized (this) {
        addS.add(data);
        this.notify();
    }
    return false;
}
 

/**
 * Fill the internal buffer using data from the underlying input stream.
 * 
 * @return false if at end of stream
 */
protected boolean fill()
    throws IOException {

    int nRead = 0;

    if (parsingHeader) {

        if (lastValid == buf.length) {
            throw new IllegalArgumentException
                (sm.getString("iib.requestheadertoolarge.error"));
        }

        bbuf.clear();
        nRead = Socket.recvbb(socket, 0, buf.length - lastValid);
        if (nRead > 0) {
            bbuf.limit(nRead);
            bbuf.get(buf, pos, nRead);
            lastValid = pos + nRead;
        } else {
            if ((-nRead) == Status.EAGAIN) {
                return false;
            } else {
                throw new IOException(sm.getString("iib.failedread"));
            }
        }

    } else {

        if (buf.length - end < 4500) {
            // In this case, the request header was really large, so we allocate a 
            // brand new one; the old one will get GCed when subsequent requests
            // clear all references
            buf = new byte[buf.length];
            end = 0;
        }
        pos = end;
        lastValid = pos;
        bbuf.clear();
        nRead = Socket.recvbb(socket, 0, buf.length - lastValid);
        if (nRead > 0) {
            bbuf.limit(nRead);
            bbuf.get(buf, pos, nRead);
            lastValid = pos + nRead;
        } else {
            if ((-nRead) == Status.ETIMEDOUT || (-nRead) == Status.TIMEUP) {
                throw new SocketTimeoutException(sm.getString("iib.failedread"));
            } else if (nRead == 0) {
                // APR_STATUS_IS_EOF, since native 1.1.22
                return false;
            } else if (-nRead == Status.APR_EGENERAL && wrapper.isSecure()) {
                // Not entirely sure why this is necessary. Testing to date has not
                // identified any issues with this but log it so it can be tracked
                // if it is suspected of causing issues in the future.
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("iib.apr.sslGeneralError",
                            Long.valueOf(socket), wrapper));
                }
            } else {
                throw new IOException(sm.getString("iib.failedread"));
            }
        }

    }

    return (nRead > 0);
}
 

/**
 * Fill the internal buffer using data from the underlying input stream.
 *
 * @return false if at end of stream
 */
protected boolean fill()
    throws IOException {

    int nRead = 0;

    if (parsingHeader) {

        if (lastValid == buf.length) {
            throw new IllegalArgumentException
                (sm.getString("iib.requestheadertoolarge.error"));
        }

        bbuf.clear();
        nRead = Socket.recvbb(socket, 0, buf.length - lastValid);
        if (nRead > 0) {
            bbuf.limit(nRead);
            bbuf.get(buf, pos, nRead);
            lastValid = pos + nRead;
        } else {
            if ((-nRead) == Status.EAGAIN) {
                return false;
            } else {
                throw new IOException(sm.getString("iib.failedread"));
            }
        }

    } else {

        if (buf.length - end < 4500) {
            // In this case, the request header was really large, so we allocate a
            // brand new one; the old one will get GCed when subsequent requests
            // clear all references
            buf = new byte[buf.length];
            end = 0;
        }
        pos = end;
        lastValid = pos;
        bbuf.clear();
        nRead = Socket.recvbb(socket, 0, buf.length - lastValid);
        if (nRead > 0) {
            bbuf.limit(nRead);
            bbuf.get(buf, pos, nRead);
            lastValid = pos + nRead;
        } else {
            if ((-nRead) == Status.ETIMEDOUT || (-nRead) == Status.TIMEUP) {
                throw new SocketTimeoutException(sm.getString("iib.failedread"));
            } else if (nRead == 0) {
                // APR_STATUS_IS_EOF, since native 1.1.22
                return false;
            } else if (-nRead == Status.APR_EGENERAL && wrapper.isSecure()) {
                // Not entirely sure why this is necessary. Testing to date has not
                // identified any issues with this but log it so it can be tracked
                // if it is suspected of causing issues in the future.
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("iib.apr.sslGeneralError",
                            Long.valueOf(socket), wrapper));
                }
            } else {
                throw new IOException(sm.getString("iib.failedread"));
            }
        }

    }

    return (nRead > 0);
}
 

private void doWriteInternal(ByteBuffer from) throws IOException {
    int thisTime;

    do {
        thisTime = 0;
        if (getEndpoint().isSSLEnabled()) {
            if (sslOutputBuffer.remaining() == 0) {
                // Buffer was fully written last time around
                sslOutputBuffer.clear();
                transfer(from, sslOutputBuffer);
                sslOutputBuffer.flip();
            } else {
                // Buffer still has data from previous attempt to write
                // APR + SSL requires that exactly the same parameters are
                // passed when re-attempting the write
            }
            thisTime = Socket.sendb(getSocket().longValue(), sslOutputBuffer,
                    sslOutputBuffer.position(), sslOutputBuffer.limit());
            if (thisTime > 0) {
                sslOutputBuffer.position(sslOutputBuffer.position() + thisTime);
            }
        } else {
            thisTime = Socket.sendb(getSocket().longValue(), from, from.position(),
                    from.remaining());
            if (thisTime > 0) {
                from.position(from.position() + thisTime);
            }
        }
        if (Status.APR_STATUS_IS_EAGAIN(-thisTime)) {
            thisTime = 0;
        } else if (-thisTime == Status.APR_EOF) {
            throw new EOFException(sm.getString("socket.apr.clientAbort"));
        } else if ((OS.IS_WIN32 || OS.IS_WIN64) &&
                (-thisTime == Status.APR_OS_START_SYSERR + 10053)) {
            // 10053 on Windows is connection aborted
            throw new EOFException(sm.getString("socket.apr.clientAbort"));
        } else if (thisTime < 0) {
            throw new IOException(sm.getString("socket.apr.write.error",
                    Integer.valueOf(-thisTime), getSocket(), this));
        }
    } while ((thisTime > 0 || getBlockingStatus()) && from.hasRemaining());

    // If there is data left in the buffer the socket will be registered for
    // write further up the stack. This is to ensure the socket is only
    // registered for write once as both container and user code can trigger
    // write registration.
}
 

private int doWriteInternal(byte[] b, int off, int len) throws IOException {

        int start = off;
        int left = len;
        int written;

        do {
            if (endpoint.isSSLEnabled()) {
                if (sslOutputBuffer.remaining() == 0) {
                    // Buffer was fully written last time around
                    sslOutputBuffer.clear();
                    if (left < SSL_OUTPUT_BUFFER_SIZE) {
                        sslOutputBuffer.put(b, start, left);
                    } else {
                        sslOutputBuffer.put(b, start, SSL_OUTPUT_BUFFER_SIZE);
                    }
                    sslOutputBuffer.flip();
                } else {
                    // Buffer still has data from previous attempt to write
                    // APR + SSL requires that exactly the same parameters are
                    // passed when re-attempting the write
                }
                written = Socket.sendb(socket, sslOutputBuffer,
                        sslOutputBuffer.position(), sslOutputBuffer.limit());
                if (written > 0) {
                    sslOutputBuffer.position(
                            sslOutputBuffer.position() + written);
                }
            } else {
                written = Socket.send(socket, b, start, left);
            }
            if (Status.APR_STATUS_IS_EAGAIN(-written)) {
                written = 0;
            } else if (-written == Status.APR_EOF) {
                throw new EOFException(sm.getString("apr.clientAbort"));
            } else if ((OS.IS_WIN32 || OS.IS_WIN64) &&
                    (-written == Status.APR_OS_START_SYSERR + 10053)) {
                // 10053 on Windows is connection aborted
                throw new EOFException(sm.getString("apr.clientAbort"));
            } else if (written < 0) {
                throw new IOException(sm.getString("apr.write.error",
                        Integer.valueOf(-written), Long.valueOf(socket), wrapper));
            }
            start += written;
            left -= written;
        } while (written > 0 && left > 0);

        if (left > 0) {
            endpoint.getPoller().add(socket, -1, false, true);
        }
        return len - left;
    }
 

@Override
protected int doRead(boolean block, byte[] b, int off, int len)
        throws IOException {

    if (closed) {
        throw new IOException(sm.getString("apr.closed", Long.valueOf(socket)));
    }

    Lock readLock = wrapper.getBlockingStatusReadLock();
    WriteLock writeLock = wrapper.getBlockingStatusWriteLock();

    boolean readDone = false;
    int result = 0;
    try {
        readLock.lock();
        if (wrapper.getBlockingStatus() == block) {
            result = Socket.recv(socket, b, off, len);
            readDone = true;
        }
    } finally {
        readLock.unlock();
    }

    if (!readDone) {
        try {
            writeLock.lock();
            wrapper.setBlockingStatus(block);
            // Set the current settings for this socket
            Socket.optSet(socket, Socket.APR_SO_NONBLOCK, (block ? 0 : 1));
            // Downgrade the lock
            try {
                readLock.lock();
                writeLock.unlock();
                result = Socket.recv(socket, b, off, len);
            } finally {
                readLock.unlock();
            }
        } finally {
            // Should have been released above but may not have been on some
            // exception paths
            if (writeLock.isHeldByCurrentThread()) {
                writeLock.unlock();
            }
        }
    }

    if (result > 0) {
        eagain = false;
        return result;
    } else if (-result == Status.EAGAIN) {
        eagain = true;
        return 0;
    } else if (-result == Status.APR_EGENERAL && wrapper.isSecure()) {
        // Not entirely sure why this is necessary. Testing to date has not
        // identified any issues with this but log it so it can be tracked
        // if it is suspected of causing issues in the future.
        if (log.isDebugEnabled()) {
            log.debug(sm.getString("apr.read.sslGeneralError",
                    Long.valueOf(socket), wrapper));
        }
        eagain = true;
        return 0;
    } else if (-result == Status.APR_EOF) {
        throw new EOFException(sm.getString("apr.clientAbort"));
    } else if ((OS.IS_WIN32 || OS.IS_WIN64) &&
            (-result == Status.APR_OS_START_SYSERR + 10053)) {
        // 10053 on Windows is connection aborted
        throw new EOFException(sm.getString("apr.clientAbort"));
    } else {
        throw new IOException(sm.getString("apr.read.error",
                Integer.valueOf(-result), Long.valueOf(socket), wrapper));
    }
}
 

private int fillReadBuffer(boolean block, ByteBuffer to) throws IOException {
    if (closed) {
        throw new IOException(sm.getString("socket.apr.closed", getSocket()));
    }

    Lock readLock = getBlockingStatusReadLock();
    WriteLock writeLock = getBlockingStatusWriteLock();

    boolean readDone = false;
    int result = 0;
    readLock.lock();
    try {
        if (getBlockingStatus() == block) {
            if (block) {
                Socket.timeoutSet(getSocket().longValue(), getReadTimeout() * 1000);
            }
            result = Socket.recvb(getSocket().longValue(), to, to.position(),
                    to.remaining());
            readDone = true;
        }
    } finally {
        readLock.unlock();
    }

    if (!readDone) {
        writeLock.lock();
        try {
            // Set the current settings for this socket
            setBlockingStatus(block);
            if (block) {
                Socket.timeoutSet(getSocket().longValue(), getReadTimeout() * 1000);
            } else {
                Socket.timeoutSet(getSocket().longValue(), 0);
            }
            // Downgrade the lock
            readLock.lock();
            try {
                writeLock.unlock();
                result = Socket.recvb(getSocket().longValue(), to, to.position(),
                        to.remaining());
            } finally {
                readLock.unlock();
            }
        } finally {
            // Should have been released above but may not have been on some
            // exception paths
            if (writeLock.isHeldByCurrentThread()) {
                writeLock.unlock();
            }
        }
    }

    if (result > 0) {
        to.position(to.position() + result);
        return result;
    } else if (result == 0 || -result == Status.EAGAIN) {
        return 0;
    } else if ((-result) == Status.ETIMEDOUT || (-result) == Status.TIMEUP) {
        if (block) {
            throw new SocketTimeoutException(sm.getString("iib.readtimeout"));
        } else {
            // Attempting to read from the socket when the poller
            // has not signalled that there is data to read appears
            // to behave like a blocking read with a short timeout
            // on OSX rather than like a non-blocking read. If no
            // data is read, treat the resulting timeout like a
            // non-blocking read that returned no data.
            return 0;
        }
    } else if (-result == Status.APR_EOF) {
        return -1;
    } else if ((OS.IS_WIN32 || OS.IS_WIN64) &&
            (-result == Status.APR_OS_START_SYSERR + 10053)) {
        // 10053 on Windows is connection aborted
        throw new EOFException(sm.getString("socket.apr.clientAbort"));
    } else {
        throw new IOException(sm.getString("socket.apr.read.error",
                Integer.valueOf(-result), getSocket(), this));
    }
}
 

/**
 * Add the sendfile data to the sendfile poller. Note that in most cases,
 * the initial non blocking calls to sendfile will return right away, and
 * will be handled asynchronously inside the kernel. As a result,
 * the poller will never be used.
 *
 * @param data containing the reference to the data which should be snet
 * @return true if all the data has been sent right away, and false
 *              otherwise
 */
public SendfileState add(SendfileData data) {
    // Initialize fd from data given
    try {
        data.fdpool = Socket.pool(data.socket);
        data.fd = File.open
            (data.fileName, File.APR_FOPEN_READ
             | File.APR_FOPEN_SENDFILE_ENABLED | File.APR_FOPEN_BINARY,
             0, data.fdpool);
        // Set the socket to nonblocking mode
        Socket.timeoutSet(data.socket, 0);
        while (sendfileRunning) {
            long nw = Socket.sendfilen(data.socket, data.fd,
                                       data.pos, data.length, 0);
            if (nw < 0) {
                if (!(-nw == Status.EAGAIN)) {
                    Pool.destroy(data.fdpool);
                    data.socket = 0;
                    return SendfileState.ERROR;
                } else {
                    // Break the loop and add the socket to poller.
                    break;
                }
            } else {
                data.pos += nw;
                data.length -= nw;
                if (data.length == 0) {
                    // Entire file has been sent
                    Pool.destroy(data.fdpool);
                    // Set back socket to blocking mode
                    Socket.timeoutSet(data.socket, getConnectionTimeout() * 1000);
                    return SendfileState.DONE;
                }
            }
        }
    } catch (Exception e) {
        log.warn(sm.getString("endpoint.sendfile.error"), e);
        return SendfileState.ERROR;
    }
    // Add socket to the list. Newly added sockets will wait
    // at most for pollTime before being polled
    synchronized (this) {
        addS.add(data);
        this.notify();
    }
    return SendfileState.PENDING;
}
 

/**
 * Add the sendfile data to the sendfile poller. Note that in most cases,
 * the initial non blocking calls to sendfile will return right away, and
 * will be handled asynchronously inside the kernel. As a result,
 * the poller will never be used.
 *
 * @param data containing the reference to the data which should be snet
 * @return true if all the data has been sent right away, and false
 *              otherwise
 */
public boolean add(SendfileData data) {
    // Initialize fd from data given
    try {
        data.fdpool = Socket.pool(data.socket);
        data.fd = File.open
            (data.fileName, File.APR_FOPEN_READ
             | File.APR_FOPEN_SENDFILE_ENABLED | File.APR_FOPEN_BINARY,
             0, data.fdpool);
        data.pos = data.start;
        // Set the socket to nonblocking mode
        Socket.timeoutSet(data.socket, 0);
        while (true) {
            long nw = Socket.sendfilen(data.socket, data.fd,
                                       data.pos, data.end - data.pos, 0);
            if (nw < 0) {
                if (!(-nw == Status.EAGAIN)) {
                    Pool.destroy(data.fdpool);
                    data.socket = 0;
                    return false;
                } else {
                    // Break the loop and add the socket to poller.
                    break;
                }
            } else {
                data.pos = data.pos + nw;
                if (data.pos >= data.end) {
                    // Entire file has been sent
                    Pool.destroy(data.fdpool);
                    // Set back socket to blocking mode
                    Socket.timeoutSet(
                            data.socket, getSoTimeout() * 1000);
                    return true;
                }
            }
        }
    } catch (Exception e) {
        log.warn(sm.getString("endpoint.sendfile.error"), e);
        return false;
    }
    // Add socket to the list. Newly added sockets will wait
    // at most for pollTime before being polled
    synchronized (this) {
        addS.add(data);
        this.notify();
    }
    return false;
}