diff options
Diffstat (limited to 'doc/src/snippets/code/src_corelib_thread_qmutex.cpp')
| -rw-r--r-- | doc/src/snippets/code/src_corelib_thread_qmutex.cpp | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/doc/src/snippets/code/src_corelib_thread_qmutex.cpp b/doc/src/snippets/code/src_corelib_thread_qmutex.cpp deleted file mode 100644 index f5fbeb8419..0000000000 --- a/doc/src/snippets/code/src_corelib_thread_qmutex.cpp +++ /dev/null @@ -1,193 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** This file is part of the documentation of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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 Nokia Corporation and its Subsidiary(-ies) 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] -int number = 6; - -void method1() -{ - number *= 5; - number /= 4; -} - -void method2() -{ - number *= 3; - number /= 2; -} -//! [0] - - -//! [1] -// method1() -number *= 5; // number is now 30 -number /= 4; // number is now 7 - -// method2() -number *= 3; // number is now 21 -number /= 2; // number is now 10 -//! [1] - - -//! [2] -// Thread 1 calls method1() -number *= 5; // number is now 30 - -// Thread 2 calls method2(). -// -// Most likely Thread 1 has been put to sleep by the operating -// system to allow Thread 2 to run. -number *= 3; // number is now 90 -number /= 2; // number is now 45 - -// Thread 1 finishes executing. -number /= 4; // number is now 11, instead of 10 -//! [2] - - -//! [3] -QMutex mutex; -int number = 6; - -void method1() -{ - mutex.lock(); - number *= 5; - number /= 4; - mutex.unlock(); -} - -void method2() -{ - mutex.lock(); - number *= 3; - number /= 2; - mutex.unlock(); -} -//! [3] - - -//! [4] -int complexFunction(int flag) -{ - mutex.lock(); - - int retVal = 0; - - switch (flag) { - case 0: - case 1: - retVal = moreComplexFunction(flag); - break; - case 2: - { - int status = anotherFunction(); - if (status < 0) { - mutex.unlock(); - return -2; - } - retVal = status + flag; - } - break; - default: - if (flag > 10) { - mutex.unlock(); - return -1; - } - break; - } - - mutex.unlock(); - return retVal; -} -//! [4] - - -//! [5] -int complexFunction(int flag) -{ - QMutexLocker locker(&mutex); - - int retVal = 0; - - switch (flag) { - case 0: - case 1: - return moreComplexFunction(flag); - case 2: - { - int status = anotherFunction(); - if (status < 0) - return -2; - retVal = status + flag; - } - break; - default: - if (flag > 10) - return -1; - break; - } - - return retVal; -} -//! [5] - - -//! [6] -class SignalWaiter -{ -private: - QMutexLocker locker; - -public: - SignalWaiter(QMutex *mutex) - : locker(mutex) - { - } - - void waitForSignal() - { - ... - while (!signalled) - waitCondition.wait(locker.mutex()); - ... - } -}; -//! [6] |