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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /package/source/zipapi/XBufferedThreadedStream.hxx | |
parent | Initial commit. (diff) | |
download | libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip |
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'package/source/zipapi/XBufferedThreadedStream.hxx')
-rw-r--r-- | package/source/zipapi/XBufferedThreadedStream.hxx | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/package/source/zipapi/XBufferedThreadedStream.hxx b/package/source/zipapi/XBufferedThreadedStream.hxx new file mode 100644 index 000000000..ad5d3b0ce --- /dev/null +++ b/package/source/zipapi/XBufferedThreadedStream.hxx @@ -0,0 +1,83 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#ifndef INCLUDED_PACKAGE_SOURCE_ZIPAPI_XBUFFEREDTHREADEDSTREAM_HXX +#define INCLUDED_PACKAGE_SOURCE_ZIPAPI_XBUFFEREDTHREADEDSTREAM_HXX + +#include <com/sun/star/io/XInputStream.hpp> + +#include <cppuhelper/implbase.hxx> +#include <rtl/ref.hxx> +#include <salhelper/thread.hxx> + +#include <queue> +#include <mutex> +#include <condition_variable> + +typedef css::uno::Sequence< sal_Int8 > Buffer; + +class XBufferedThreadedStream : public cppu::WeakImplHelper< css::io::XInputStream > +{ +private: + const css::uno::Reference<XInputStream> mxSrcStream; + sal_Int64 mnPos; /// position in stream + sal_Int64 mnStreamSize; /// available size of stream + + Buffer maInUseBuffer; /// Buffer block in use + int mnOffset; /// position in maInUseBuffer + std::queue < Buffer > maPendingBuffers; /// Buffers that are available for use + std::queue < Buffer > maUsedBuffers; + + rtl::Reference< salhelper::Thread > mxUnzippingThread; + std::mutex maBufferProtector; /// mutex protecting Buffer queues. + std::condition_variable maBufferConsumeResume; + std::condition_variable maBufferProduceResume; + bool mbTerminateThread; /// indicates the failure of one of the threads + + std::exception_ptr maSavedException; /// exception caught during unzipping is saved to be thrown during reading + + static const size_t nBufferLowWater = 2; + static const size_t nBufferHighWater = 4; + static const size_t nBufferSize = 32 * 1024; + + const Buffer& getNextBlock(); + sal_Int64 remainingSize() const { return mnStreamSize - mnPos; } + bool hasBytes() const { return mnPos < mnStreamSize; } + + bool canProduce() const + { + return( mbTerminateThread || maPendingBuffers.size() < nBufferHighWater ); + } + + bool canConsume() const + { + return( mbTerminateThread || !maPendingBuffers.empty() ); + } + +public: + XBufferedThreadedStream( + const css::uno::Reference<XInputStream>& xSrcStream, + sal_Int64 nStreamSize /* cf. sal_Int32 available(); */ ); + + virtual ~XBufferedThreadedStream() override; + + void produce(); + void setTerminateThread(); + void saveException(const std::exception_ptr& exception) { maSavedException = exception; } + + // XInputStream + virtual sal_Int32 SAL_CALL readBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) override; + virtual sal_Int32 SAL_CALL readSomeBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) override; + virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override; + virtual sal_Int32 SAL_CALL available( ) override; + virtual void SAL_CALL closeInput( ) override; +}; +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |