36703975a0
Change-Id: I68bb665798edf464020c8c3a6f7d9c9f5e85869e Reviewed-on: https://gerrit.libreoffice.org/c/core/+/167379 Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk> Tested-by: Jenkins
358 lines
9.4 KiB
C++
358 lines
9.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <com/sun/star/io/BufferSizeExceededException.hpp>
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#include <com/sun/star/io/NotConnectedException.hpp>
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#include <com/sun/star/io/XPipe.hpp>
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#include <com/sun/star/io/XConnectable.hpp>
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#include <com/sun/star/lang/XServiceInfo.hpp>
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#include <cppuhelper/implbase.hxx>
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#include <cppuhelper/supportsservice.hxx>
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#include <osl/conditn.hxx>
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#include <osl/mutex.hxx>
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#include <limits>
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#include <memory>
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#include <optional>
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#include <string.h>
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using namespace ::osl;
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using namespace ::cppu;
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using namespace ::com::sun::star::uno;
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using namespace ::com::sun::star::io;
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using namespace ::com::sun::star::lang;
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#include "streamhelper.hxx"
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namespace com::sun::star::uno { class XComponentContext; }
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namespace io_stm{
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namespace {
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class OPipeImpl :
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public WeakImplHelper< XPipe , XConnectable , XServiceInfo >
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{
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public:
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OPipeImpl( );
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public: // XInputStream
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virtual sal_Int32 SAL_CALL readBytes(Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead) override;
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virtual sal_Int32 SAL_CALL readSomeBytes(Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead) override;
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virtual void SAL_CALL skipBytes(sal_Int32 nBytesToSkip) override;
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virtual sal_Int32 SAL_CALL available() override;
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virtual void SAL_CALL closeInput() override;
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public: // XOutputStream
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virtual void SAL_CALL writeBytes(const Sequence< sal_Int8 >& aData) override;
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virtual void SAL_CALL flush() override;
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virtual void SAL_CALL closeOutput() override;
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public: // XConnectable
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virtual void SAL_CALL setPredecessor(const Reference< XConnectable >& aPredecessor) override;
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virtual Reference< XConnectable > SAL_CALL getPredecessor() override;
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virtual void SAL_CALL setSuccessor(const Reference < XConnectable > & aSuccessor) override;
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virtual Reference < XConnectable > SAL_CALL getSuccessor() override ;
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public: // XServiceInfo
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OUString SAL_CALL getImplementationName() override;
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Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
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sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
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private:
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Reference < XConnectable > m_succ;
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Reference < XConnectable > m_pred;
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sal_Int32 m_nBytesToSkip;
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bool m_bOutputStreamClosed;
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bool m_bInputStreamClosed;
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osl::Condition m_conditionBytesAvail;
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Mutex m_mutexAccess;
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std::optional<MemFIFO> m_oFIFO;
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};
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}
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OPipeImpl::OPipeImpl()
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: m_nBytesToSkip(0 )
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, m_bOutputStreamClosed(false )
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, m_bInputStreamClosed( false )
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, m_oFIFO( std::in_place )
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{
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}
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sal_Int32 OPipeImpl::readBytes(Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
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{
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while( true )
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{
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{ // start guarded section
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MutexGuard guard( m_mutexAccess );
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if( m_bInputStreamClosed )
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{
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throw NotConnectedException(
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u"Pipe::readBytes NotConnectedException"_ustr,
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*this );
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}
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sal_Int32 nOccupiedBufferLen = m_oFIFO->getSize();
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if( m_bOutputStreamClosed && nBytesToRead > nOccupiedBufferLen )
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{
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nBytesToRead = nOccupiedBufferLen;
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}
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if( nOccupiedBufferLen < nBytesToRead )
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{
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// wait outside guarded section
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m_conditionBytesAvail.reset();
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}
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else {
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// necessary bytes are available
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m_oFIFO->read( aData , nBytesToRead );
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return nBytesToRead;
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}
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} // end guarded section
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// wait for new data outside guarded section!
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m_conditionBytesAvail.wait();
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}
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}
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sal_Int32 OPipeImpl::readSomeBytes(Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead)
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{
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while( true ) {
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{
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MutexGuard guard( m_mutexAccess );
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if( m_bInputStreamClosed )
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{
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throw NotConnectedException(
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u"Pipe::readSomeBytes NotConnectedException"_ustr,
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*this );
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}
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if( m_oFIFO->getSize() )
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{
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sal_Int32 nSize = std::min( nMaxBytesToRead , m_oFIFO->getSize() );
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aData.realloc( nSize );
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m_oFIFO->read( aData , nSize );
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return nSize;
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}
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if( m_bOutputStreamClosed )
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{
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// no bytes in buffer anymore
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return 0;
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}
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}
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m_conditionBytesAvail.wait();
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}
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}
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void OPipeImpl::skipBytes(sal_Int32 nBytesToSkip)
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{
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MutexGuard guard( m_mutexAccess );
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if( m_bInputStreamClosed )
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{
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throw NotConnectedException(
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u"Pipe::skipBytes NotConnectedException"_ustr,
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*this );
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}
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if( nBytesToSkip < 0
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|| (nBytesToSkip
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> std::numeric_limits< sal_Int32 >::max() - m_nBytesToSkip) )
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{
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throw BufferSizeExceededException(
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u"Pipe::skipBytes BufferSizeExceededException"_ustr,
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*this );
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}
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m_nBytesToSkip += nBytesToSkip;
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nBytesToSkip = std::min( m_oFIFO->getSize() , m_nBytesToSkip );
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m_oFIFO->skip( nBytesToSkip );
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m_nBytesToSkip -= nBytesToSkip;
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}
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sal_Int32 OPipeImpl::available()
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{
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MutexGuard guard( m_mutexAccess );
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if( m_bInputStreamClosed )
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{
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throw NotConnectedException(
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u"Pipe::available NotConnectedException"_ustr,
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*this );
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}
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return m_oFIFO->getSize();
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}
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void OPipeImpl::closeInput()
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{
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MutexGuard guard( m_mutexAccess );
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m_bInputStreamClosed = true;
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m_oFIFO.reset();
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// readBytes may throw an exception
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m_conditionBytesAvail.set();
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setSuccessor( Reference< XConnectable > () );
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}
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void OPipeImpl::writeBytes(const Sequence< sal_Int8 >& aData)
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{
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MutexGuard guard( m_mutexAccess );
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if( m_bOutputStreamClosed )
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{
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throw NotConnectedException(
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u"Pipe::writeBytes NotConnectedException (outputstream)"_ustr,
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*this );
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}
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if( m_bInputStreamClosed )
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{
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throw NotConnectedException(
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u"Pipe::writeBytes NotConnectedException (inputstream)"_ustr,
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*this );
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}
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// check skipping
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sal_Int32 nLen = aData.getLength();
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if( m_nBytesToSkip && m_nBytesToSkip >= nLen ) {
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// all must be skipped - forget whole call
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m_nBytesToSkip -= nLen;
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return;
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}
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// adjust buffersize if necessary
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if( m_nBytesToSkip )
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{
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Sequence< sal_Int8 > seqCopy( nLen - m_nBytesToSkip );
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memcpy( seqCopy.getArray() , &( aData.getConstArray()[m_nBytesToSkip] ) , nLen-m_nBytesToSkip );
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m_oFIFO->write( seqCopy );
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}
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else
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{
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m_oFIFO->write( aData );
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}
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m_nBytesToSkip = 0;
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// readBytes may check again if enough bytes are available
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m_conditionBytesAvail.set();
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}
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void OPipeImpl::flush()
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{
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// nothing to do for a pipe
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}
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void OPipeImpl::closeOutput()
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{
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MutexGuard guard( m_mutexAccess );
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m_bOutputStreamClosed = true;
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m_conditionBytesAvail.set();
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setPredecessor( Reference < XConnectable > () );
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}
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void OPipeImpl::setSuccessor( const Reference < XConnectable > &r )
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{
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/// if the references match, nothing needs to be done
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if( m_succ != r ) {
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/// store the reference for later use
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m_succ = r;
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if( m_succ.is() )
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{
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m_succ->setPredecessor(
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Reference< XConnectable > ( static_cast< XConnectable * >(this) ) );
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}
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}
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}
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Reference < XConnectable > OPipeImpl::getSuccessor()
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{
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return m_succ;
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}
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// XDataSource
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void OPipeImpl::setPredecessor( const Reference < XConnectable > &r )
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{
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if( r != m_pred ) {
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m_pred = r;
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if( m_pred.is() ) {
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m_pred->setSuccessor(
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Reference < XConnectable > ( static_cast< XConnectable * >(this) ) );
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}
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}
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}
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Reference < XConnectable > OPipeImpl::getPredecessor()
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{
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return m_pred;
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}
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// XServiceInfo
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OUString OPipeImpl::getImplementationName()
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{
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return u"com.sun.star.comp.io.stm.Pipe"_ustr;
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}
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// XServiceInfo
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sal_Bool OPipeImpl::supportsService(const OUString& ServiceName)
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{
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return cppu::supportsService(this, ServiceName);
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}
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// XServiceInfo
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Sequence< OUString > OPipeImpl::getSupportedServiceNames()
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{
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return { u"com.sun.star.io.Pipe"_ustr };
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}
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}
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extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
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io_OPipeImpl_get_implementation(
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css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
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{
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return cppu::acquire(new io_stm::OPipeImpl());
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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