From c7b3f408f772d565666910cb4495a7057796b648 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jo=C3=A3o=20Abecasis?= Date: Wed, 13 Jan 2010 18:03:52 +0100 Subject: QFile: Fix a pre-mature pessimization Don't repeatedly call the fileEngine virtual function. Instead re-use the private data member if we know it has been filled. Reviewed-by: Markus Goetz --- src/corelib/io/qfile.cpp | 86 +++++++++++++++++++++++------------------------- 1 file changed, 42 insertions(+), 44 deletions(-) diff --git a/src/corelib/io/qfile.cpp b/src/corelib/io/qfile.cpp index 4c7f3f0..7405339 100644 --- a/src/corelib/io/qfile.cpp +++ b/src/corelib/io/qfile.cpp @@ -650,7 +650,7 @@ QFile::remove() unsetError(); return true; } - d->setError(QFile::RemoveError, fileEngine()->errorString()); + d->setError(QFile::RemoveError, d->fileEngine->errorString()); } return false; } @@ -704,7 +704,7 @@ QFile::rename(const QString &newName) if (fileEngine()->rename(newName)) { unsetError(); // engine was able to handle the new name so we just reset it - fileEngine()->setFileName(newName); + d->fileEngine->setFileName(newName); d->fileName = newName; return true; } @@ -740,7 +740,7 @@ QFile::rename(const QString &newName) if (error) { out.remove(); } else { - fileEngine()->setFileName(newName); + d->fileEngine->setFileName(newName); setPermissions(permissions()); unsetError(); setFileName(newName); @@ -805,7 +805,7 @@ QFile::link(const QString &linkName) unsetError(); return true; } - d->setError(QFile::RenameError, fileEngine()->errorString()); + d->setError(QFile::RenameError, d->fileEngine->errorString()); return false; } @@ -994,10 +994,10 @@ bool QFile::open(OpenMode mode) seek(size()); return true; } - QFile::FileError err = fileEngine()->error(); + QFile::FileError err = d->fileEngine->error(); if(err == QFile::UnspecifiedError) err = QFile::OpenError; - d->setError(err, fileEngine()->errorString()); + d->setError(err, d->fileEngine->errorString()); return false; } @@ -1155,8 +1155,8 @@ QFile::handle() const if (!isOpen()) return -1; - if (QAbstractFileEngine *engine = fileEngine()) - return engine->handle(); + if (fileEngine()) + return d->fileEngine->handle(); return -1; } @@ -1189,13 +1189,12 @@ QFile::handle() const uchar *QFile::map(qint64 offset, qint64 size, MemoryMapFlags flags) { Q_D(QFile); - QAbstractFileEngine *engine = fileEngine(); - if (engine - && engine->supportsExtension(QAbstractFileEngine::MapExtension)) { + if (fileEngine() + && d->fileEngine->supportsExtension(QAbstractFileEngine::MapExtension)) { unsetError(); - uchar *address = engine->map(offset, size, flags); + uchar *address = d->fileEngine->map(offset, size, flags); if (address == 0) - d->setError(engine->error(), engine->errorString()); + d->setError(d->fileEngine->error(), d->fileEngine->errorString()); return address; } return 0; @@ -1212,13 +1211,12 @@ uchar *QFile::map(qint64 offset, qint64 size, MemoryMapFlags flags) bool QFile::unmap(uchar *address) { Q_D(QFile); - QAbstractFileEngine *engine = fileEngine(); - if (engine - && engine->supportsExtension(QAbstractFileEngine::UnMapExtension)) { + if (fileEngine() + && d->fileEngine->supportsExtension(QAbstractFileEngine::UnMapExtension)) { unsetError(); - bool success = engine->unmap(address); + bool success = d->fileEngine->unmap(address); if (!success) - d->setError(engine->error(), engine->errorString()); + d->setError(d->fileEngine->error(), d->fileEngine->errorString()); return success; } return false; @@ -1251,13 +1249,14 @@ QFile::resize(qint64 sz) Q_D(QFile); if (!d->ensureFlushed()) return false; - if (isOpen() && fileEngine()->pos() > sz) + fileEngine(); + if (isOpen() && d->fileEngine->pos() > sz) seek(sz); - if(fileEngine()->setSize(sz)) { + if(d->fileEngine->setSize(sz)) { unsetError(); return true; } - d->setError(QFile::ResizeError, fileEngine()->errorString()); + d->setError(QFile::ResizeError, d->fileEngine->errorString()); return false; } @@ -1321,7 +1320,7 @@ QFile::setPermissions(Permissions permissions) unsetError(); return true; } - d->setError(QFile::PermissionsError, fileEngine()->errorString()); + d->setError(QFile::PermissionsError, d->fileEngine->errorString()); return false; } @@ -1354,23 +1353,23 @@ bool QFile::flush() { Q_D(QFile); + fileEngine(); if (!d->writeBuffer.isEmpty()) { qint64 size = d->writeBuffer.size(); - if (_qfile_writeData(d->fileEngine ? d->fileEngine : fileEngine(), - &d->writeBuffer) != size) { - QFile::FileError err = fileEngine()->error(); + if (_qfile_writeData(d->fileEngine, &d->writeBuffer) != size) { + QFile::FileError err = d->fileEngine->error(); if(err == QFile::UnspecifiedError) err = QFile::WriteError; - d->setError(err, fileEngine()->errorString()); + d->setError(err, d->fileEngine->errorString()); return false; } } - if (!fileEngine()->flush()) { - QFile::FileError err = fileEngine()->error(); + if (!d->fileEngine->flush()) { + QFile::FileError err = d->fileEngine->error(); if(err == QFile::UnspecifiedError) err = QFile::WriteError; - d->setError(err, fileEngine()->errorString()); + d->setError(err, d->fileEngine->errorString()); return false; } return true; @@ -1398,7 +1397,7 @@ QFile::close() if (fileEngine()->close() && flushed) unsetError(); else if (flushed) - d->setError(fileEngine()->error(), fileEngine()->errorString()); + d->setError(d->fileEngine->error(), d->fileEngine->errorString()); } /*! @@ -1451,10 +1450,10 @@ bool QFile::atEnd() const return false; // If the file engine knows best, say what it says. - if (fileEngine()->supportsExtension(QAbstractFileEngine::AtEndExtension)) { + if (d->fileEngine->supportsExtension(QAbstractFileEngine::AtEndExtension)) { // Check if the file engine supports AtEndExtension, and if it does, // check if the file engine claims to be at the end. - return fileEngine()->atEnd(); + return d->fileEngine->atEnd(); } // Fall back to checking how much is available (will stat files). @@ -1476,11 +1475,11 @@ bool QFile::seek(qint64 off) if (!d->ensureFlushed()) return false; - if (!fileEngine()->seek(off) || !QIODevice::seek(off)) { - QFile::FileError err = fileEngine()->error(); + if (!d->fileEngine->seek(off) || !QIODevice::seek(off)) { + QFile::FileError err = d->fileEngine->error(); if(err == QFile::UnspecifiedError) err = QFile::PositionError; - d->setError(err, fileEngine()->errorString()); + d->setError(err, d->fileEngine->errorString()); return false; } unsetError(); @@ -1496,8 +1495,8 @@ qint64 QFile::readLineData(char *data, qint64 maxlen) if (!d->ensureFlushed()) return -1; - if (fileEngine()->supportsExtension(QAbstractFileEngine::FastReadLineExtension)) - return fileEngine()->readLine(data, maxlen); + if (d->fileEngine->supportsExtension(QAbstractFileEngine::FastReadLineExtension)) + return d->fileEngine->readLine(data, maxlen); // Fall back to QIODevice's readLine implementation if the engine // cannot do it faster. @@ -1516,15 +1515,15 @@ qint64 QFile::readData(char *data, qint64 len) return -1; qint64 ret = -1; - qint64 read = fileEngine()->read(data, len); + qint64 read = d->fileEngine->read(data, len); if (read != -1) ret = read; if(ret < 0) { - QFile::FileError err = fileEngine()->error(); + QFile::FileError err = d->fileEngine->error(); if(err == QFile::UnspecifiedError) err = QFile::ReadError; - d->setError(err, fileEngine()->errorString()); + d->setError(err, d->fileEngine->errorString()); } return ret; } @@ -1606,13 +1605,12 @@ QFile::writeData(const char *data, qint64 len) // Write directly to the engine if the block size is larger than // the write buffer size. if (!buffered || len > QFILE_WRITEBUFFER_SIZE) { - QAbstractFileEngine *fe = d->fileEngine ? d->fileEngine : fileEngine(); - qint64 ret = fe->write(data, len); + qint64 ret = d->fileEngine->write(data, len); if(ret < 0) { - QFile::FileError err = fileEngine()->error(); + QFile::FileError err = d->fileEngine->error(); if(err == QFile::UnspecifiedError) err = QFile::WriteError; - d->setError(err, fileEngine()->errorString()); + d->setError(err, d->fileEngine->errorString()); } return ret; } -- cgit v0.12