diff options
Diffstat (limited to 'sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_thread_qreadwritelock.cpp')
-rw-r--r-- | sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_thread_qreadwritelock.cpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_thread_qreadwritelock.cpp b/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_thread_qreadwritelock.cpp new file mode 100644 index 000000000..015aadfaf --- /dev/null +++ b/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_thread_qreadwritelock.cpp @@ -0,0 +1,111 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation of PySide2. +** +** $QT_BEGIN_LICENSE:BSD$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** BSD License Usage +** Alternatively, you may use this file under the terms of the BSD license +** as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] +lock = QReadWriteLock() + +class ReaderThread: + # ... + def run(): + # ... + lock.lockForRead() + read_file() + lock.unlock() + # ... + +class WriterThread: + #... + def run(): + # ... + lock.lockForWrite() + write_file() + lock.unlock() + # ... +//! [0] + + +//! [1] +lock = QReadWriteLock() + +def readData(): + locker = QReadLocker(lock) + # ... + return data +//! [1] + + +//! [2] +lock = QReadWriteLock() + +def readData(): + locker.lockForRead() + # ... + locker.unlock() + return data +//! [2] + + +//! [3] +lock = QReadWriteLock() + +def writeData(data): + locker = QWriteLocker(lock) + # ... +//! [3] + + +//! [4] +lock = QReadWriteLock() + +def writeData(data): + locker.lockForWrite() + # ... + locker.unlock() +//! [4] |