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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 05:54:39 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 05:54:39 +0000
commit267c6f2ac71f92999e969232431ba04678e7437e (patch)
tree358c9467650e1d0a1d7227a21dac2e3d08b622b2 /package/inc/ThreadedDeflater.hxx
parentInitial commit. (diff)
downloadlibreoffice-267c6f2ac71f92999e969232431ba04678e7437e.tar.xz
libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.zip
Adding upstream version 4:24.2.0.upstream/4%24.2.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'package/inc/ThreadedDeflater.hxx')
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diff --git a/package/inc/ThreadedDeflater.hxx b/package/inc/ThreadedDeflater.hxx
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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,
+ std::function<void(const css::uno::Sequence<sal_Int8>&, sal_Int32)> aProcessInputFunc,
+ std::function<void(const css::uno::Sequence<sal_Int8>&, sal_Int32)> aProcessOutputFunc);
+ 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: */