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/* -*- 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_PACKAGE_THREADEDDEFLATER_HXX
#define INCLUDED_PACKAGE_THREADEDDEFLATER_HXX
#include <com/sun/star/uno/Sequence.hxx>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/uno/Reference.hxx>
#include <comphelper/threadpool.hxx>
#include <memory>
#include <vector>
#include <functional>
namespace ZipUtils
{
/// Parallel compression a stream using the libz deflate algorithm.
///
/// Call deflateWrite() with the input stream and input/output processing functions.
/// This will use multiple threads for compression on each batch of data from the stream.
class ThreadedDeflater final
{
class Task;
// Note: All this should be lock-less. Each task writes only to its part
// of the data.
std::vector<std::vector<sal_Int8>> outBuffers;
std::shared_ptr<comphelper::ThreadTaskTag> threadTaskTag;
css::uno::Sequence<sal_Int8> inBuffer;
css::uno::Sequence<sal_Int8> prevDataBlock;
std::function<void(const css::uno::Sequence<sal_Int8>&, sal_Int32)> maProcessOutputFunc;
sal_Int64 totalIn;
sal_Int64 totalOut;
int zlibLevel;
public:
// Unlike with Deflater class, bNoWrap is always true.
ThreadedDeflater(sal_Int32 nSetLevel);
~ThreadedDeflater() COVERITY_NOEXCEPT_FALSE;
void deflateWrite(const css::uno::Reference<css::io::XInputStream>& xInStream,
const std::function<void(const css::uno::Sequence<sal_Int8>&, sal_Int32)>&
rProcessInputFunc,
const std::function<void(const css::uno::Sequence<sal_Int8>&, sal_Int32)>&
rProcessOutputFunc);
sal_Int64 getTotalIn() const { return totalIn; }
sal_Int64 getTotalOut() const { return totalOut; }
private:
void processDeflatedBuffers();
void clear();
};
} // namespace
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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