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diff --git a/io/source/stm/opipe.cxx b/io/source/stm/opipe.cxx
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+/*************************************************************************
+ *
+ *  $RCSfile: opipe.cxx,v $
+ *
+ *  $Revision: 1.1.1.1 $
+ *
+ *  last change: $Author: hr $ $Date: 2000-09-18 17:24:18 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+// streams
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/io/XConnectable.hpp>
+
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+#include <cppuhelper/factory.hxx>
+
+#include <cppuhelper/implbase4.hxx>      // OWeakObject
+
+#include <osl/conditn.hxx>
+#include <osl/mutex.hxx>
+
+#include <assert.h>
+#include <string.h>
+
+using namespace ::rtl;
+using namespace ::osl;
+using namespace ::cppu;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::io;
+using namespace ::com::sun::star::lang;
+
+#include "factreg.hxx"
+#include "streamhelper.hxx"
+
+// Implementation and service names
+#define IMPLEMENTATION_NAME "com.sun.star.comp.io.stm.Pipe"
+#define SERVICE_NAME "com.sun.star.io.Pipe"
+#define MAX_BUFFER_SIZE     0x80000000
+
+
+namespace io_stm{
+
+class OPipeImpl :
+    public WeakImplHelper4< XInputStream , XOutputStream , XConnectable , XServiceInfo >
+{
+public:
+    OPipeImpl( );
+    ~OPipeImpl();
+
+public: // XInputStream
+    virtual sal_Int32 SAL_CALL readBytes(Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
+        throw(  NotConnectedException,
+                BufferSizeExceededException,
+                RuntimeException );
+    virtual sal_Int32 SAL_CALL readSomeBytes(Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead)
+        throw( NotConnectedException,
+               BufferSizeExceededException,
+               RuntimeException );
+    virtual void SAL_CALL skipBytes(sal_Int32 nBytesToSkip)
+        throw( NotConnectedException,
+               BufferSizeExceededException,
+               RuntimeException );
+    virtual sal_Int32 SAL_CALL available(void)
+        throw( NotConnectedException,
+               RuntimeException );
+    virtual void SAL_CALL closeInput(void)
+        throw( NotConnectedException,
+               RuntimeException );
+
+public: // XOutputStream
+
+    virtual void SAL_CALL writeBytes(const Sequence< sal_Int8 >& aData)
+        throw( NotConnectedException,
+               BufferSizeExceededException,
+               RuntimeException );
+    virtual void SAL_CALL flush(void)
+        throw( NotConnectedException,
+               BufferSizeExceededException,
+               RuntimeException );
+    virtual void SAL_CALL closeOutput(void)
+        throw( NotConnectedException,
+               BufferSizeExceededException,
+               RuntimeException );
+
+public: // XConnectable
+    virtual void SAL_CALL setPredecessor(const Reference< XConnectable >& aPredecessor)
+        throw( RuntimeException );
+    virtual Reference< XConnectable > SAL_CALL getPredecessor(void) throw( RuntimeException );
+    virtual void SAL_CALL setSuccessor(const Reference < XConnectable > & aSuccessor)
+        throw( RuntimeException );
+    virtual Reference < XConnectable > SAL_CALL getSuccessor(void) throw( RuntimeException ) ;
+
+
+public: // XServiceInfo
+    OUString                    SAL_CALL getImplementationName() throw(  );
+    Sequence< OUString >         SAL_CALL getSupportedServiceNames(void) throw(  );
+    sal_Bool                        SAL_CALL supportsService(const OUString& ServiceName) throw(  );
+
+private:
+
+    // DEBUG
+    inline void checkInvariant();
+
+    Reference < XConnectable >  m_succ;
+    Reference < XConnectable >  m_pred;
+
+    sal_Int32 m_nBytesToSkip;
+
+    sal_Int8  *m_p;
+
+    sal_Bool m_bOutputStreamClosed;
+    sal_Bool m_bInputStreamClosed;
+
+    oslCondition m_conditionBytesAvail;
+    Mutex     m_mutexAccess;
+    IFIFO       *m_pFIFO;
+};
+
+
+
+OPipeImpl::OPipeImpl()
+{
+    m_nBytesToSkip  = 0;
+
+    m_bOutputStreamClosed   = sal_False;
+    m_bInputStreamClosed    = sal_False;
+
+    m_pFIFO = new MemFIFO;
+    m_conditionBytesAvail = osl_createCondition();
+}
+
+OPipeImpl::~OPipeImpl()
+{
+    osl_destroyCondition( m_conditionBytesAvail );
+    delete m_pFIFO;
+}
+
+
+// These invariants must hold when entering a guarded method or leaving a guarded method.
+void OPipeImpl::checkInvariant()
+{
+
+}
+
+sal_Int32 OPipeImpl::readBytes(Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
+    throw( NotConnectedException, BufferSizeExceededException,RuntimeException )
+{
+    while( sal_True )
+    {
+        { // start guarded section
+            MutexGuard guard( m_mutexAccess );
+            if( m_bInputStreamClosed )
+            {
+                throw NotConnectedException();
+            }
+            sal_Int32 nOccupiedBufferLen = m_pFIFO->getSize();
+
+            if( m_bOutputStreamClosed && nBytesToRead > nOccupiedBufferLen )
+            {
+                nBytesToRead = nOccupiedBufferLen;
+            }
+
+            if( nOccupiedBufferLen < nBytesToRead )
+            {
+                // wait outside guarded section
+                osl_resetCondition( m_conditionBytesAvail );
+            }
+            else {
+                // necessary bytes are available
+                m_pFIFO->read( aData , nBytesToRead );
+                return nBytesToRead;
+            }
+        } // end guarded section
+
+        // wait for new data outside guarded section!
+        osl_waitCondition( m_conditionBytesAvail , 0 );
+    }
+
+    // this point is never reached
+    return 0;
+}
+
+
+sal_Int32 OPipeImpl::readSomeBytes(Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead)
+    throw( NotConnectedException,
+           BufferSizeExceededException,
+           RuntimeException )
+{
+    while( sal_True ) {
+        {
+            MutexGuard guard( m_mutexAccess );
+            if( m_bInputStreamClosed )
+            {
+                throw NotConnectedException();
+            }
+            if( m_pFIFO->getSize() )
+            {
+                sal_Int32 nSize = Min( nMaxBytesToRead , m_pFIFO->getSize() );
+                aData.realloc( nSize );
+                m_pFIFO->read( aData , nSize );
+                return nSize;
+            }
+
+            if( m_bOutputStreamClosed )
+            {
+                // no bytes in buffer anymore
+                return 0;
+            }
+        }
+
+        osl_waitCondition( m_conditionBytesAvail , 0 );
+    }
+
+    // this point is never reached
+    return 0;
+}
+
+
+void OPipeImpl::skipBytes(sal_Int32 nBytesToSkip)
+    throw( NotConnectedException,
+           BufferSizeExceededException,
+           RuntimeException )
+{
+    MutexGuard guard( m_mutexAccess );
+    if( nBytesToSkip + m_nBytesToSkip > MAX_BUFFER_SIZE || 0 > nBytesToSkip + m_nBytesToSkip )
+    {
+        throw BufferSizeExceededException();
+    }
+    m_nBytesToSkip += nBytesToSkip;
+
+    nBytesToSkip = Min( m_pFIFO->getSize() , m_nBytesToSkip );
+    m_pFIFO->skip( nBytesToSkip );
+    m_nBytesToSkip -= nBytesToSkip;
+}
+
+
+sal_Int32 OPipeImpl::available(void)
+    throw( NotConnectedException,
+           RuntimeException )
+ {
+    MutexGuard guard( m_mutexAccess );
+    checkInvariant();
+    return m_pFIFO->getSize();
+}
+
+void OPipeImpl::closeInput(void)
+    throw( NotConnectedException,
+           RuntimeException)
+{
+    MutexGuard guard( m_mutexAccess );
+
+    m_bInputStreamClosed = sal_True;
+
+    delete m_pFIFO;
+    m_pFIFO = 0;
+
+    // readBytes may throw an exception
+    osl_setCondition( m_conditionBytesAvail );
+
+    setSuccessor( Reference< XConnectable > () );
+    return;
+}
+
+
+void OPipeImpl::writeBytes(const Sequence< sal_Int8 >& aData)
+    throw( NotConnectedException,
+           BufferSizeExceededException,
+           RuntimeException)
+{
+    MutexGuard guard( m_mutexAccess );
+    checkInvariant();
+
+    if( m_bOutputStreamClosed )
+    {
+        throw NotConnectedException();
+    }
+
+    if( m_bInputStreamClosed )
+    {
+        throw NotConnectedException();
+    }
+
+    // check skipping
+    sal_Int32 nLen = aData.getLength();
+    if( m_nBytesToSkip  && m_nBytesToSkip >= nLen  ) {
+        // all must be skipped - forget whole call
+        m_nBytesToSkip -= nLen;
+        return;
+    }
+
+    // adjust buffersize if necessary
+
+    try
+    {
+        if( m_nBytesToSkip )
+        {
+            Sequence< sal_Int8 > seqCopy( nLen - m_nBytesToSkip );
+            memcpy( seqCopy.getArray() , &( aData.getConstArray()[m_nBytesToSkip] ) , nLen-m_nBytesToSkip );
+            m_pFIFO->write( seqCopy );
+        }
+        else
+        {
+            m_pFIFO->write( aData );
+        }
+        m_nBytesToSkip = 0;
+    }
+    catch ( IFIFO_OutOfBoundsException & )
+    {
+        throw BufferSizeExceededException();
+    }
+    catch ( IFIFO_OutOfMemoryException & )
+    {
+        throw BufferSizeExceededException();
+    }
+
+    // readBytes may check again if enough bytes are available
+    osl_setCondition( m_conditionBytesAvail );
+
+    checkInvariant();
+}
+
+
+void OPipeImpl::flush(void)
+    throw( NotConnectedException,
+           BufferSizeExceededException,
+           RuntimeException)
+{
+    // nothing to do for a pipe
+    return;
+}
+
+void OPipeImpl::closeOutput(void)
+    throw( NotConnectedException,
+           BufferSizeExceededException,
+           RuntimeException)
+{
+    MutexGuard guard( m_mutexAccess );
+
+    m_bOutputStreamClosed = sal_True;
+    osl_setCondition( m_conditionBytesAvail );
+    setPredecessor( Reference < XConnectable > () );
+    return;
+}
+
+
+void OPipeImpl::setSuccessor( const Reference < XConnectable >  &r )
+    throw( RuntimeException )
+{
+     /// if the references match, nothing needs to be done
+     if( m_succ != r ) {
+         /// store the reference for later use
+         m_succ = r;
+
+         if( m_succ.is() )
+         {
+              m_succ->setPredecessor(
+                  Reference< XConnectable > ( SAL_STATIC_CAST( XConnectable * , this ) ) );
+         }
+     }
+}
+
+Reference < XConnectable > OPipeImpl::getSuccessor()    throw( RuntimeException )
+{
+    return m_succ;
+}
+
+
+// XDataSource
+void OPipeImpl::setPredecessor( const Reference < XConnectable > &r )
+    throw( RuntimeException )
+{
+    if( r != m_pred ) {
+        m_pred = r;
+        if( m_pred.is() ) {
+            m_pred->setSuccessor(
+                Reference < XConnectable > ( SAL_STATIC_CAST( XConnectable * , this ) ) );
+        }
+    }
+}
+
+Reference < XConnectable > OPipeImpl::getPredecessor() throw( RuntimeException )
+{
+    return m_pred;
+}
+
+
+
+
+// XServiceInfo
+OUString OPipeImpl::getImplementationName() throw(  )
+{
+    return OPipeImpl_getImplementationName();
+}
+
+// XServiceInfo
+sal_Bool OPipeImpl::supportsService(const OUString& ServiceName) throw(  )
+{
+    Sequence< OUString > aSNL = getSupportedServiceNames();
+    const OUString * pArray = aSNL.getConstArray();
+
+    for( sal_Int32 i = 0; i < aSNL.getLength(); i++ )
+        if( pArray[i] == ServiceName )
+            return sal_True;
+
+    return sal_False;
+}
+
+// XServiceInfo
+Sequence< OUString > OPipeImpl::getSupportedServiceNames(void) throw(  )
+{
+    Sequence<OUString> seq(1);
+    seq.getArray()[0] = OPipeImpl_getServiceName();
+    return seq;
+}
+
+
+
+
+
+/* implementation functions
+*
+*
+*/
+
+
+Reference < XInterface > SAL_CALL OPipeImpl_CreateInstance(
+    const Reference < XMultiServiceFactory > & rSMgr ) throw(Exception)
+{
+    OPipeImpl *p = new OPipeImpl;
+
+    return Reference < XInterface > ( SAL_STATIC_CAST( OWeakObject * , p ) );
+}
+
+
+OUString OPipeImpl_getServiceName()
+{
+    return OUString( RTL_CONSTASCII_USTRINGPARAM ( SERVICE_NAME ) );
+}
+
+OUString    OPipeImpl_getImplementationName()
+{
+    return OUString( RTL_CONSTASCII_USTRINGPARAM ( SERVICE_NAME ) );
+}
+
+Sequence<OUString> OPipeImpl_getSupportedServiceNames(void)
+{
+    Sequence<OUString> aRet(1);
+    aRet.getArray()[0] = OPipeImpl_getServiceName();
+
+    return aRet;
+}
+}
+
+