Qt 4.8
qatomic_generic_windows.cpp
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41 
42 #include "qplatformdefs.h"
43 
44 #include <QtCore/qatomic.h>
45 
47 
49 {
50 public:
51  QCriticalSection() { InitializeCriticalSection(&section); }
52  ~QCriticalSection() { DeleteCriticalSection(&section); }
53  void lock() { EnterCriticalSection(&section); }
54  void unlock() { LeaveCriticalSection(&section); }
55 
56 private:
57  CRITICAL_SECTION section;
58 };
59 
61 
63 bool QBasicAtomicInt_testAndSetOrdered(volatile int *_q_value, int expectedValue, int newValue)
64 {
65  bool returnValue = false;
66  qAtomicCriticalSection.lock();
67  if (*_q_value == expectedValue) {
68  *_q_value = newValue;
69  returnValue = true;
70  }
71  qAtomicCriticalSection.unlock();
72  return returnValue;
73 }
74 
76 int QBasicAtomicInt_fetchAndStoreOrdered(volatile int *_q_value, int newValue)
77 {
78  int returnValue;
79  qAtomicCriticalSection.lock();
80  returnValue = *_q_value;
81  *_q_value = newValue;
82  qAtomicCriticalSection.unlock();
83  return returnValue;
84 }
85 
87 int QBasicAtomicInt_fetchAndAddOrdered(volatile int *_q_value, int valueToAdd)
88 {
89  int returnValue;
90  qAtomicCriticalSection.lock();
91  returnValue = *_q_value;
92  *_q_value += valueToAdd;
93  qAtomicCriticalSection.unlock();
94  return returnValue;
95 }
96 
98 bool QBasicAtomicPointer_testAndSetOrdered(void * volatile *_q_value,
99  void *expectedValue,
100  void *newValue)
101 {
102  bool returnValue = false;
103  qAtomicCriticalSection.lock();
104  if (*_q_value == expectedValue) {
105  *_q_value = newValue;
106  returnValue = true;
107  }
108  qAtomicCriticalSection.unlock();
109  return returnValue;
110 }
111 
113 void *QBasicAtomicPointer_fetchAndStoreOrdered(void * volatile *_q_value, void *newValue)
114 {
115  void *returnValue;
116  qAtomicCriticalSection.lock();
117  returnValue = *_q_value;
118  *_q_value = newValue;
119  qAtomicCriticalSection.unlock();
120  return returnValue;
121 }
122 
124 void *QBasicAtomicPointer_fetchAndAddOrdered(void * volatile *_q_value, qptrdiff valueToAdd)
125 {
126  void *returnValue;
127  qAtomicCriticalSection.lock();
128  returnValue = *_q_value;
129  *_q_value = reinterpret_cast<char *>(returnValue) + valueToAdd;
130  qAtomicCriticalSection.unlock();
131  return returnValue;
132 }
133 
Q_CORE_EXPORT void * QBasicAtomicPointer_fetchAndStoreOrdered(void *volatile *_q_value, void *newValue)
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
Q_CORE_EXPORT bool QBasicAtomicInt_testAndSetOrdered(volatile int *_q_value, int expectedValue, int newValue)
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
QIntegerForSizeof< void * >::Signed qptrdiff
Definition: qglobal.h:987
Q_CORE_EXPORT bool QBasicAtomicPointer_testAndSetOrdered(void *volatile *_q_value, void *expectedValue, void *newValue)
Q_CORE_EXPORT void * QBasicAtomicPointer_fetchAndAddOrdered(void *volatile *_q_value, qptrdiff valueToAdd)
#define Q_CORE_EXPORT
Definition: qglobal.h:1449
Q_CORE_EXPORT int QBasicAtomicInt_fetchAndStoreOrdered(volatile int *_q_value, int newValue)
Q_CORE_EXPORT int QBasicAtomicInt_fetchAndAddOrdered(volatile int *_q_value, int valueToAdd)
static QCriticalSection qAtomicCriticalSection