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Source at commit 1322 created 9 years 5 months ago.
By meklort, Add doxygen to utils folder
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Nokia Corporation (qt-info@nokia.com)
5**
6** This file is part of the QtCore module of the Qt Toolkit.
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8** $QT_BEGIN_LICENSE:LGPL$
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15** GNU Lesser General Public License Usage
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28** GNU General Public License Usage
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41
42#include <windows.h>
43
44#include "qmutex.h"
45#include "qmutex_p.h"
46
47QMutexPrivate::QMutexPrivate()
48 : contenders(0)
49{
50 event = CreateEvent(0, FALSE, FALSE, 0);
51 if (!event)
52 qWarning("QMutexPrivate::QMutexPrivate: Cannot create event");
53}
54
55QMutexPrivate::~QMutexPrivate()
56{
57 CloseHandle(event);
58}
59
60void QMutexPrivate::wait()
61{
62 WaitForSingleObject(event, INFINITE);
63}
64
65void QMutexPrivate::wakeUp()
66{
67 SetEvent(event);
68}
69
70//----------------------------------------------------------------------
71
72class QCriticalSection
73{
74 public:
75 QCriticalSection() { InitializeCriticalSection(&section); }
76 ~QCriticalSection() { DeleteCriticalSection(&section); }
77 void lock() { EnterCriticalSection(&section); }
78 void unlock() { LeaveCriticalSection(&section); }
79
80 private:
81 CRITICAL_SECTION section;
82};
83
84static QCriticalSection qAtomicCriticalSection;
85
86bool QAtomicInt::testAndSet(int expectedValue,int newValue)
87{
88 bool returnValue = false;
89 qAtomicCriticalSection.lock();
90 if (m_value == expectedValue)
91 {
92 m_value = newValue;
93 returnValue = true;
94 }
95 qAtomicCriticalSection.unlock();
96 return returnValue;
97}
98
99int QAtomicInt::fetchAndAdd(int valueToAdd)
100{
101 int returnValue;
102 qAtomicCriticalSection.lock();
103 returnValue = m_value;
104 m_value += valueToAdd;
105 qAtomicCriticalSection.unlock();
106 return returnValue;
107}
108
109

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