diff -r 000000000000 -r 1918ee327afb tests/benchmarks/qfile/main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/benchmarks/qfile/main.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,651 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QDebug>
+#include <QTemporaryFile>
+#include <QFSFileEngine>
+#include <QString>
+#include <QDirIterator>
+
+#include <qtest.h>
+
+#include <stdio.h>
+
+#ifdef Q_OS_WIN
+# include <windows.h>
+# include <atlbase.h>
+#endif
+
+#define BUFSIZE 1024*512
+#define FACTOR 1024*512
+#define TF_SIZE FACTOR*81
+
+// 10 predefined (but random() seek positions
+// hardcoded to be comparable over several runs
+const int seekpos[] = {TF_SIZE*0.52,
+                       TF_SIZE*0.23,
+                       TF_SIZE*0.73,
+                       TF_SIZE*0.77,
+                       TF_SIZE*0.80,
+                       TF_SIZE*0.12,
+                       TF_SIZE*0.53,
+                       TF_SIZE*0.21,
+                       TF_SIZE*0.27,
+                       TF_SIZE*0.78};
+
+const int sp_size = sizeof(seekpos)/sizeof(int);
+
+class tst_qfile: public QObject
+{
+Q_ENUMS(BenchmarkType)
+Q_OBJECT
+public:
+    enum BenchmarkType {
+        QFileBenchmark = 1,
+        QFSFileEngineBenchmark,
+        Win32Benchmark,
+        PosixBenchmark,
+        QFileFromPosixBenchmark
+    };
+private slots:
+    void initTestCase();
+    void cleanupTestCase();
+
+    void open_data();
+    void open();
+    void seek_data();
+    void seek();
+
+    void readSmallFiles_QFile();
+    void readSmallFiles_QFSFileEngine();
+    void readSmallFiles_posix();
+    void readSmallFiles_Win32();
+
+    void readSmallFiles_QFile_data();
+    void readSmallFiles_QFSFileEngine_data();
+    void readSmallFiles_posix_data();
+    void readSmallFiles_Win32_data();
+
+    void readBigFile_QFile_data();
+    void readBigFile_QFSFileEngine_data();
+    void readBigFile_posix_data();
+    void readBigFile_Win32_data();
+
+    void readBigFile_QFile();
+    void readBigFile_QFSFileEngine();
+    void readBigFile_posix();
+    void readBigFile_Win32();
+
+private:
+    void readBigFile_data(BenchmarkType type, QIODevice::OpenModeFlag t, QIODevice::OpenModeFlag b);
+    void readBigFile();
+    void readSmallFiles_data(BenchmarkType type, QIODevice::OpenModeFlag t, QIODevice::OpenModeFlag b);
+    void readSmallFiles();
+    void createFile();
+    void fillFile(int factor=FACTOR);
+    void removeFile();
+    void createSmallFiles();
+    void removeSmallFiles();
+    QString filename;
+    QString tmpDirName;
+};
+
+void tst_qfile::createFile()
+{
+    QTemporaryFile tmpFile;
+    tmpFile.setAutoRemove(false);
+    if (!tmpFile.open())
+        ::_exit(1);
+    filename = tmpFile.fileName();
+    tmpFile.close();
+}
+
+void tst_qfile::removeFile()
+{
+    if (!filename.isEmpty())
+        QFile::remove(filename);
+}
+
+void tst_qfile::fillFile(int factor)
+{
+    QFile tmpFile(filename);
+    tmpFile.open(QIODevice::WriteOnly);
+    //for (int row=0; row<factor; ++row) {
+    //    tmpFile.write(QByteArray().fill('0'+row%('0'-'z'), 80));
+    //    tmpFile.write("\n");
+    //}
+    tmpFile.seek(factor*80);
+    tmpFile.putChar('\n');
+    tmpFile.close();
+    // let IO settle
+    QTest::qSleep(2000);
+}
+
+void tst_qfile::initTestCase()
+{
+}
+
+void tst_qfile::cleanupTestCase()
+{
+}
+
+void tst_qfile::readBigFile_QFile() { readBigFile(); }
+void tst_qfile::readBigFile_QFSFileEngine() { readBigFile(); }
+void tst_qfile::readBigFile_posix() { readBigFile(); }
+void tst_qfile::readBigFile_Win32() { readBigFile(); }
+
+void tst_qfile::readBigFile_QFile_data()
+{
+    readBigFile_data(QFileBenchmark, QIODevice::NotOpen, QIODevice::NotOpen);
+    readBigFile_data(QFileBenchmark, QIODevice::NotOpen, QIODevice::Unbuffered);
+    readBigFile_data(QFileBenchmark, QIODevice::Text, QIODevice::NotOpen);
+    readBigFile_data(QFileBenchmark, QIODevice::Text, QIODevice::Unbuffered);
+
+}
+
+void tst_qfile::readBigFile_QFSFileEngine_data()
+{
+    readBigFile_data(QFSFileEngineBenchmark, QIODevice::NotOpen, QIODevice::NotOpen);
+    readBigFile_data(QFSFileEngineBenchmark, QIODevice::NotOpen, QIODevice::Unbuffered);
+    readBigFile_data(QFSFileEngineBenchmark, QIODevice::Text, QIODevice::NotOpen);
+    readBigFile_data(QFSFileEngineBenchmark, QIODevice::Text, QIODevice::Unbuffered);
+}
+
+void tst_qfile::readBigFile_posix_data()
+{
+    readBigFile_data(PosixBenchmark, QIODevice::NotOpen, QIODevice::NotOpen);
+}
+
+void tst_qfile::readBigFile_Win32_data()
+{
+    readBigFile_data(Win32Benchmark, QIODevice::NotOpen, QIODevice::NotOpen);
+}
+
+
+void tst_qfile::readBigFile_data(BenchmarkType type, QIODevice::OpenModeFlag t, QIODevice::OpenModeFlag b)
+{
+    QTest::addColumn<tst_qfile::BenchmarkType>("testType");
+    QTest::addColumn<int>("blockSize");
+    QTest::addColumn<QFile::OpenModeFlag>("textMode");
+    QTest::addColumn<QFile::OpenModeFlag>("bufferedMode");
+
+    const int bs[] = {1024, 1024*2, 1024*8, 1024*16, 1024*32,1024*512};
+    int bs_entries = sizeof(bs)/sizeof(const int);
+
+    QString flagstring;
+    if (t & QIODevice::Text)       flagstring += "textMode ";
+    if (b & QIODevice::Unbuffered) flagstring += "unbuffered ";
+    if (flagstring.isEmpty())      flagstring = "none";
+
+    for (int i=0; i<bs_entries; ++i)
+        QTest::newRow((QString("BS: %1, Flags: %2" )).arg(bs[i]).arg(flagstring).toLatin1().constData()) << type << bs[i] << t << b;
+  
+}
+
+void tst_qfile::readBigFile()
+{
+    QFETCH(tst_qfile::BenchmarkType, testType);
+    QFETCH(int, blockSize);
+    QFETCH(QFile::OpenModeFlag, textMode);
+    QFETCH(QFile::OpenModeFlag, bufferedMode);
+
+    char buffer[BUFSIZE]; // we can't allocate buffers nice and dynamically in c++
+    removeFile();
+    createFile();
+    fillFile();
+
+    switch (testType) {
+        case(QFileBenchmark): {
+            QFile file(filename);
+            file.open(QIODevice::ReadOnly|textMode|bufferedMode);
+            QBENCHMARK {
+                while(!file.atEnd())
+                    file.read(blockSize);
+                file.reset();
+            }
+            file.close();
+        }
+        break;
+        case(QFSFileEngineBenchmark): {
+            QFSFileEngine fse(filename);
+            fse.open(QIODevice::ReadOnly|textMode|bufferedMode);
+            QBENCHMARK {
+               //qWarning() << fse.supportsExtension(QAbstractFileEngine::AtEndExtension);
+               while(fse.read(buffer, blockSize));
+               fse.seek(0);
+            }
+            fse.close();
+        }
+        break;
+        case(PosixBenchmark): {
+            QByteArray data = filename.toLocal8Bit();
+            const char* cfilename = data.constData();
+            FILE* cfile = ::fopen(cfilename, "rb");
+            QBENCHMARK {
+                while(!feof(cfile))
+                    ::fread(buffer, blockSize, 1, cfile);
+                ::fseek(cfile, 0, SEEK_SET);
+            }
+            ::fclose(cfile);
+        }
+        break;
+        case(QFileFromPosixBenchmark): {
+            // No gain in benchmarking this case
+        }
+        break;
+        case(Win32Benchmark): {
+#ifdef Q_OS_WIN
+            HANDLE hndl;
+
+            // ensure we don't account string conversion
+            wchar_t* cfilename = (wchar_t*)filename.utf16();
+
+            hndl = CreateFile(cfilename, GENERIC_READ, 0, 0, OPEN_EXISTING, 0, 0);
+            Q_ASSERT(hndl);
+            wchar_t* nativeBuffer = new wchar_t[BUFSIZE];
+            DWORD numberOfBytesRead;
+
+            QBENCHMARK {
+                do {
+                   ReadFile(hndl, nativeBuffer, blockSize, &numberOfBytesRead, NULL);
+                } while(numberOfBytesRead != 0);
+                SetFilePointer(hndl, 0, NULL, FILE_BEGIN);
+            }
+            delete[] nativeBuffer;
+            CloseHandle(hndl);
+#else
+            QFAIL("Not running on a non-Windows platform!");
+#endif
+        }
+        break;
+    }
+}
+
+void tst_qfile::seek_data()
+{
+    QTest::addColumn<tst_qfile::BenchmarkType>("testType");
+    QTest::newRow("QFile") << QFileBenchmark;
+    QTest::newRow("QFSFileEngine") << QFSFileEngineBenchmark;
+    QTest::newRow("Posix FILE*") << PosixBenchmark;
+#ifdef Q_OS_WIN
+    QTest::newRow("Win32 API") << Win32Benchmark;
+#endif
+}
+
+void tst_qfile::seek()
+{
+    QFETCH(tst_qfile::BenchmarkType, testType);
+    int i = 0;
+
+    createFile();
+    fillFile();
+
+    switch (testType) {
+        case(QFileBenchmark): {
+            QFile file(filename);
+            file.open(QIODevice::ReadOnly);
+            QBENCHMARK {
+                i=(i+1)%sp_size;
+                file.seek(seekpos[i]);
+            }
+            file.close();
+        }
+        break;
+        case(QFSFileEngineBenchmark): {
+            QFSFileEngine fse(filename);
+            fse.open(QIODevice::ReadOnly);
+            QBENCHMARK {
+                i=(i+1)%sp_size;
+                fse.seek(seekpos[i]);
+            }
+            fse.close();
+        }
+        break;
+        case(PosixBenchmark): {
+            QByteArray data = filename.toLocal8Bit();
+            const char* cfilename = data.constData();
+            FILE* cfile = ::fopen(cfilename, "rb");
+            QBENCHMARK {
+                i=(i+1)%sp_size;
+                ::fseek(cfile, seekpos[i], SEEK_SET);
+            }
+            ::fclose(cfile);
+        }
+        break;
+        case(QFileFromPosixBenchmark): {
+            // No gain in benchmarking this case
+        }
+        break;
+        case(Win32Benchmark): {
+#ifdef Q_OS_WIN
+            HANDLE hndl;
+
+            // ensure we don't account string conversion
+            wchar_t* cfilename = (wchar_t*)filename.utf16();
+
+            hndl = CreateFile(cfilename, GENERIC_READ, 0, 0, OPEN_EXISTING, 0, 0);
+            Q_ASSERT(hndl);
+            QBENCHMARK {
+                i=(i+1)%sp_size;
+                SetFilePointer(hndl, seekpos[i], NULL, 0);
+            }
+            CloseHandle(hndl);
+#else
+            QFAIL("Not running on a Windows plattform!");
+#endif
+        }
+        break;
+    }
+}
+
+void tst_qfile::open_data()
+{
+    QTest::addColumn<tst_qfile::BenchmarkType>("testType");
+    QTest::newRow("QFile") << QFileBenchmark;
+    QTest::newRow("QFSFileEngine") << QFSFileEngineBenchmark;
+    QTest::newRow("Posix FILE*") << PosixBenchmark;
+    QTest::newRow("QFile from FILE*") << QFileFromPosixBenchmark;
+#ifdef Q_OS_WIN
+    QTest::newRow("Win32 API") << Win32Benchmark;
+#endif
+}
+
+void tst_qfile::open()
+{
+    QFETCH(tst_qfile::BenchmarkType, testType);
+
+    removeFile();
+    createFile();
+
+    switch (testType) {
+        case(QFileBenchmark): {
+            QBENCHMARK {
+                QFile file( filename );
+                file.open( QIODevice::ReadOnly );
+                file.close();
+            }
+        }
+        break;
+        case(QFSFileEngineBenchmark): {
+            QBENCHMARK {
+                QFSFileEngine fse(filename);
+                fse.open(QIODevice::ReadOnly);
+                fse.close();
+            }
+        }
+        break;
+
+        case(PosixBenchmark): {
+            // ensure we don't account toLocal8Bit()
+            QByteArray data = filename.toLocal8Bit();
+            const char* cfilename = data.constData();
+
+            QBENCHMARK {
+                FILE* cfile = ::fopen(cfilename, "rb");
+                ::fclose(cfile);
+            }
+        }
+        break;
+        case(QFileFromPosixBenchmark): {
+            // ensure we don't account toLocal8Bit()
+            QByteArray data = filename.toLocal8Bit();
+            const char* cfilename = data.constData();
+            FILE* cfile = ::fopen(cfilename, "rb");
+
+            QBENCHMARK {
+                QFile file;
+                file.open(cfile, QIODevice::ReadOnly);
+                file.close();
+            }
+        }
+        break;
+        case(Win32Benchmark): {
+#ifdef Q_OS_WIN
+            HANDLE hndl;
+
+            // ensure we don't account string conversion
+            wchar_t* cfilename = (wchar_t*)filename.utf16();
+
+            QBENCHMARK {
+                hndl = CreateFile(cfilename, GENERIC_READ, 0, 0, OPEN_EXISTING, 0, 0);
+                Q_ASSERT(hndl);
+                CloseHandle(hndl);
+            }
+#else
+        QFAIL("Not running on a non-Windows platform!");
+#endif
+        }
+        break;
+    }
+
+}
+
+
+void tst_qfile::readSmallFiles_QFile() { readSmallFiles(); }
+void tst_qfile::readSmallFiles_QFSFileEngine() { readSmallFiles(); }
+void tst_qfile::readSmallFiles_posix() { readSmallFiles(); }
+void tst_qfile::readSmallFiles_Win32() { readSmallFiles(); }
+
+void tst_qfile::readSmallFiles_QFile_data()
+{
+    readSmallFiles_data(QFileBenchmark, QIODevice::NotOpen, QIODevice::NotOpen);
+    readSmallFiles_data(QFileBenchmark, QIODevice::NotOpen, QIODevice::Unbuffered);
+    readSmallFiles_data(QFileBenchmark, QIODevice::Text, QIODevice::NotOpen);
+    readSmallFiles_data(QFileBenchmark, QIODevice::Text, QIODevice::Unbuffered);
+
+}
+
+void tst_qfile::readSmallFiles_QFSFileEngine_data()
+{
+    readSmallFiles_data(QFSFileEngineBenchmark, QIODevice::NotOpen, QIODevice::NotOpen);
+    readSmallFiles_data(QFSFileEngineBenchmark, QIODevice::NotOpen, QIODevice::Unbuffered);
+    readSmallFiles_data(QFSFileEngineBenchmark, QIODevice::Text, QIODevice::NotOpen);
+    readSmallFiles_data(QFSFileEngineBenchmark, QIODevice::Text, QIODevice::Unbuffered);
+}
+
+void tst_qfile::readSmallFiles_posix_data()
+{
+    readSmallFiles_data(PosixBenchmark, QIODevice::NotOpen, QIODevice::NotOpen);
+}
+
+void tst_qfile::readSmallFiles_Win32_data()
+{
+    readSmallFiles_data(Win32Benchmark, QIODevice::NotOpen, QIODevice::NotOpen);
+}
+
+
+void tst_qfile::readSmallFiles_data(BenchmarkType type, QIODevice::OpenModeFlag t, QIODevice::OpenModeFlag b)
+{
+    QTest::addColumn<tst_qfile::BenchmarkType>("testType");
+    QTest::addColumn<int>("blockSize");
+    QTest::addColumn<QFile::OpenModeFlag>("textMode");
+    QTest::addColumn<QFile::OpenModeFlag>("bufferedMode");
+
+    const int bs[] = {1024, 1024*2, 1024*8, 1024*16, 1024*32,1024*512};
+    int bs_entries = sizeof(bs)/sizeof(const int);
+
+    QString flagstring;
+    if (t & QIODevice::Text)       flagstring += "textMode ";
+    if (b & QIODevice::Unbuffered) flagstring += "unbuffered ";
+    if (flagstring.isEmpty())      flagstring = "none";
+
+    for (int i=0; i<bs_entries; ++i)
+        QTest::newRow((QString("BS: %1, Flags: %2" )).arg(bs[i]).arg(flagstring).toLatin1().constData()) << type << bs[i] << t << b;
+
+}
+
+void tst_qfile::createSmallFiles()
+{
+    QDir dir = QDir::temp();
+    Q_ASSERT(dir.mkdir("tst"));
+    dir.cd("tst");
+    tmpDirName = dir.absolutePath();
+
+    for (int i = 0; i < 1000; ++i)
+    {
+        QFile f(tmpDirName+"/"+QString::number(i));
+        f.open(QIODevice::WriteOnly);
+        f.seek(512);
+        f.close();
+    }
+}
+
+void tst_qfile::removeSmallFiles()
+{
+    QDirIterator it(tmpDirName, QDirIterator::FollowSymlinks);
+    while (it.hasNext())
+        QFile::remove(it.next());
+    QDir::temp().rmdir("tst");
+}
+
+
+void tst_qfile::readSmallFiles()
+{
+    QFETCH(tst_qfile::BenchmarkType, testType);
+    QFETCH(int, blockSize);
+    QFETCH(QFile::OpenModeFlag, textMode);
+    QFETCH(QFile::OpenModeFlag, bufferedMode);
+
+    removeSmallFiles();
+    createSmallFiles();
+    QDir dir(tmpDirName);
+    const QStringList files = dir.entryList(QDir::NoDotAndDotDot|QDir::NoSymLinks);
+    char buffer[BUFSIZE]; // we can't allocate buffers nice and dynamically in c++
+
+    switch (testType) {
+        case(QFileBenchmark): {
+            QList<QFile*> fileList;
+            Q_FOREACH(QString file, files) {
+                QFile *f = new QFile(file);
+                f->open(QIODevice::ReadOnly|textMode|bufferedMode);
+                fileList.append(f);
+            }
+
+            QBENCHMARK {
+                Q_FOREACH(QFile *file, fileList) {
+                    while (!file->atEnd()) {
+                       file->read(buffer, blockSize);
+                    }
+                }
+            }
+
+            Q_FOREACH(QFile *file, fileList) {
+                file->close();
+                delete file;
+            }
+        }
+        break;
+        case(QFSFileEngineBenchmark): {
+            QList<QFSFileEngine*> fileList;
+            Q_FOREACH(QString file, files) {
+                QFSFileEngine *fse = new QFSFileEngine(file);
+                fse->open(QIODevice::ReadOnly|textMode|bufferedMode);
+                fileList.append(fse);
+            }
+
+            QBENCHMARK {
+                Q_FOREACH(QFSFileEngine *fse, fileList) {
+                    while (fse->read(buffer, blockSize));
+                }
+            }
+
+            Q_FOREACH(QFSFileEngine *fse, fileList) {
+                fse->close();
+                delete fse;
+            }
+        }
+        break;
+        case(PosixBenchmark): {
+            QList<FILE*> fileList;
+            Q_FOREACH(QString file, files) {
+                fileList.append(::fopen(QFile::encodeName(file).constData(), "rb"));
+            }
+
+            QBENCHMARK {
+                Q_FOREACH(FILE* cfile, fileList) {
+                    while(!feof(cfile))
+                        ::fread(buffer, blockSize, 1, cfile);
+                    ::fseek(cfile, 0, SEEK_SET);
+                }
+            }
+
+            Q_FOREACH(FILE* cfile, fileList) {
+                ::fclose(cfile);
+            }
+        }
+        break;
+        case(QFileFromPosixBenchmark): {
+            // No gain in benchmarking this case
+        }
+        break;
+        case(Win32Benchmark): {
+#ifdef Q_OS_WIN
+            HANDLE hndl;
+
+            // ensure we don't account string conversion
+            wchar_t* cfilename = (wchar_t*)filename.utf16();
+
+            hndl = CreateFile(cfilename, GENERIC_READ, 0, 0, OPEN_EXISTING, 0, 0);
+            Q_ASSERT(hndl);
+            wchar_t* nativeBuffer = new wchar_t[BUFSIZE];
+            DWORD numberOfBytesRead;
+            QBENCHMARK {
+                do {
+                   ReadFile(hndl, nativeBuffer, blockSize, &numberOfBytesRead, NULL);
+                } while(numberOfBytesRead != 0);
+            }
+            delete nativeBuffer;
+            CloseHandle(hndl);
+#else
+            QFAIL("Not running on a non-Windows platform!");
+#endif
+        }
+        break;
+    }
+}
+
+Q_DECLARE_METATYPE(tst_qfile::BenchmarkType)
+Q_DECLARE_METATYPE(QIODevice::OpenMode)
+Q_DECLARE_METATYPE(QIODevice::OpenModeFlag)
+
+QTEST_MAIN(tst_qfile)
+
+#include "main.moc"