Qt 4.8
qatomic.h
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41 
42 #ifndef QATOMIC_H
43 #define QATOMIC_H
44 
45 #include <QtCore/qglobal.h>
46 #include <QtCore/qbasicatomic.h>
47 
48 QT_BEGIN_HEADER
49 
50 QT_BEGIN_NAMESPACE
51 
52 QT_MODULE(Core)
53 
54 // High-level atomic integer operations
55 class Q_CORE_EXPORT QAtomicInt : public QBasicAtomicInt
56 {
57 public:
58  inline QAtomicInt(int value = 0)
59  {
60 #ifdef QT_ARCH_PARISC
61  this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
62 #endif
63  _q_value = value;
64  }
65  inline QAtomicInt(const QAtomicInt &other)
66  {
67 #ifdef QT_ARCH_PARISC
68  this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
69 #endif
70  _q_value = other._q_value;
71  }
72 
73  inline QAtomicInt &operator=(int value)
74  {
75  (void) QBasicAtomicInt::operator=(value);
76  return *this;
77  }
78 
79  inline QAtomicInt &operator=(const QAtomicInt &other)
80  {
81  (void) QBasicAtomicInt::operator=(other);
82  return *this;
83  }
84 
85 #ifdef qdoc
86  bool operator==(int value) const;
87  bool operator!=(int value) const;
88  bool operator!() const;
89  operator int() const;
90 
91  static bool isReferenceCountingNative();
92  static bool isReferenceCountingWaitFree();
93 
94  bool ref();
95  bool deref();
96 
97  static bool isTestAndSetNative();
98  static bool isTestAndSetWaitFree();
99 
100  bool testAndSetRelaxed(int expectedValue, int newValue);
101  bool testAndSetAcquire(int expectedValue, int newValue);
102  bool testAndSetRelease(int expectedValue, int newValue);
103  bool testAndSetOrdered(int expectedValue, int newValue);
104 
105  static bool isFetchAndStoreNative();
106  static bool isFetchAndStoreWaitFree();
107 
108  int fetchAndStoreRelaxed(int newValue);
109  int fetchAndStoreAcquire(int newValue);
110  int fetchAndStoreRelease(int newValue);
111  int fetchAndStoreOrdered(int newValue);
112 
113  static bool isFetchAndAddNative();
114  static bool isFetchAndAddWaitFree();
115 
116  int fetchAndAddRelaxed(int valueToAdd);
117  int fetchAndAddAcquire(int valueToAdd);
118  int fetchAndAddRelease(int valueToAdd);
119  int fetchAndAddOrdered(int valueToAdd);
120 #endif
121 };
122 
123 // High-level atomic pointer operations
124 template <typename T>
125 class QAtomicPointer : public QBasicAtomicPointer<T>
126 {
127 public:
128  inline QAtomicPointer(T *value = 0)
129  {
130 #ifdef QT_ARCH_PARISC
131  this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
132 #endif
133  QBasicAtomicPointer<T>::_q_value = value;
134  }
135  inline QAtomicPointer(const QAtomicPointer<T> &other)
136  {
137 #ifdef QT_ARCH_PARISC
138  this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
139 #endif
140  QBasicAtomicPointer<T>::_q_value = other._q_value;
141  }
142 
143  inline QAtomicPointer<T> &operator=(T *value)
144  {
145  (void) QBasicAtomicPointer<T>::operator=(value);
146  return *this;
147  }
148 
149  inline QAtomicPointer<T> &operator=(const QAtomicPointer<T> &other)
150  {
151  (void) QBasicAtomicPointer<T>::operator=(other);
152  return *this;
153  }
154 
155 #ifdef qdoc
156  bool operator==(T *value) const;
157  bool operator!=(T *value) const;
158  bool operator!() const;
159  operator T *() const;
160  T *operator->() const;
161 
162  static bool isTestAndSetNative();
163  static bool isTestAndSetWaitFree();
164 
165  bool testAndSetRelaxed(T *expectedValue, T *newValue);
166  bool testAndSetAcquire(T *expectedValue, T *newValue);
167  bool testAndSetRelease(T *expectedValue, T *newValue);
168  bool testAndSetOrdered(T *expectedValue, T *newValue);
169 
170  static bool isFetchAndStoreNative();
171  static bool isFetchAndStoreWaitFree();
172 
173  T *fetchAndStoreRelaxed(T *newValue);
174  T *fetchAndStoreAcquire(T *newValue);
175  T *fetchAndStoreRelease(T *newValue);
176  T *fetchAndStoreOrdered(T *newValue);
177 
178  static bool isFetchAndAddNative();
179  static bool isFetchAndAddWaitFree();
180 
181  T *fetchAndAddRelaxed(qptrdiff valueToAdd);
182  T *fetchAndAddAcquire(qptrdiff valueToAdd);
183  T *fetchAndAddRelease(qptrdiff valueToAdd);
184  T *fetchAndAddOrdered(qptrdiff valueToAdd);
185 #endif
186 };
187 
194 template <typename T>
195 inline void qAtomicAssign(T *&d, T *x)
196 {
197  if (d == x)
198  return;
199  x->ref.ref();
200  if (!d->ref.deref())
201  delete d;
202  d = x;
203 }
204 
213 template <typename T>
214 inline void qAtomicDetach(T *&d)
215 {
216  if (d->ref == 1)
217  return;
218  T *x = d;
219  d = new T(*d);
220  if (!x->ref.deref())
221  delete x;
222 }
223 
224 QT_END_NAMESPACE
225 QT_END_HEADER
226 
227 #endif // QATOMIC_H
QBasicAtomicPointer::_q_value
T *volatile _q_value
Definition: qbasicatomic.h:148
d
double d
Definition: qnumeric_p.h:62
QAtomicPointer::operator=
QAtomicPointer< T > & operator=(const QAtomicPointer< T > &other)
Assigns other to this QAtomicPointer and returns a reference to this QAtomicPointer.
Definition: qatomic.h:149
qAtomicDetach
void qAtomicDetach(T *&d)
This is a helper for the detach method of implicitly shared classes.
Definition: qatomic.h:214
QAtomicPointer::operator==
bool operator==(T *value) const
Returns true if the value is equal to the value in this QAtomicPointer; otherwise returns false...
QAtomicPointer::QAtomicPointer
QAtomicPointer(T *value=0)
Constructs a QAtomicPointer with the given value.
Definition: qatomic.h:128
QBasicAtomicInt::_q_value
volatile int _q_value
Definition: qbasicatomic.h:64
QT_END_NAMESPACE
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
QAtomicPointer::isFetchAndStoreNative
static bool isFetchAndStoreNative()
Returns true if fetch-and-store is implemented using atomic processor instructions, false otherwise.
QT_MODULE
#define QT_MODULE(x)
Definition: qglobal.h:2783
QAtomicPointer::fetchAndStoreOrdered
T * fetchAndStoreOrdered(T *newValue)
Atomic fetch-and-store.
QT_BEGIN_HEADER
#define QT_BEGIN_HEADER
Definition: qglobal.h:136
QAtomicInt
The QAtomicInt class provides platform-independent atomic operations on integers. ...
Definition: qatomic.h:55
QAtomicPointer::fetchAndStoreRelease
T * fetchAndStoreRelease(T *newValue)
Atomic fetch-and-store.
QAtomicPointer::isTestAndSetWaitFree
static bool isTestAndSetWaitFree()
Returns true if atomic test-and-set is wait-free, false otherwise.
QAtomicInt::QAtomicInt
QAtomicInt(const QAtomicInt &other)
Constructs a copy of other.
Definition: qatomic.h:65
QAtomicPointer::testAndSetOrdered
bool testAndSetOrdered(T *expectedValue, T *newValue)
Atomic test-and-set.
QAtomicPointer::fetchAndStoreRelaxed
T * fetchAndStoreRelaxed(T *newValue)
Atomic fetch-and-store.
QAtomicInt::operator=
QAtomicInt & operator=(const QAtomicInt &other)
Assigns other to this QAtomicInt and returns a reference to this QAtomicInt.
Definition: qatomic.h:79
QAtomicPointer::testAndSetRelease
bool testAndSetRelease(T *expectedValue, T *newValue)
Atomic test-and-set.
QT_BEGIN_NAMESPACE
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
QAtomicPointer::testAndSetRelaxed
bool testAndSetRelaxed(T *expectedValue, T *newValue)
Atomic test-and-set.
QAtomicPointer::fetchAndAddAcquire
T * fetchAndAddAcquire(qptrdiff valueToAdd)
Atomic fetch-and-add.
qptrdiff
QIntegerForSizeof< void * >::Signed qptrdiff
Definition: qglobal.h:987
QAtomicPointer::operator!=
bool operator!=(T *value) const
Returns true if the value of this QAtomicPointer is not equal to value; otherwise returns false...
QAtomicPointer::isFetchAndAddNative
static bool isFetchAndAddNative()
Returns true if fetch-and-add is implemented using atomic processor instructions, false otherwise...
QAtomicInt::operator=
QAtomicInt & operator=(int value)
Assigns the value to this QAtomicInt and returns a reference to this QAtomicInt.
Definition: qatomic.h:73
QAtomicPointer::isFetchAndAddWaitFree
static bool isFetchAndAddWaitFree()
Returns true if atomic fetch-and-add is wait-free, false otherwise.
QAtomicPointer::operator->
T * operator->() const
QAtomicPointer::isTestAndSetNative
static bool isTestAndSetNative()
Returns true if test-and-set is implemented using atomic processor instructions, false otherwise...
QAtomicPointer::operator!
bool operator!() const
Returns true is the current value of this QAtomicPointer is zero; otherwise returns false...
QPointer::operator!=
bool operator!=(const T *o, const QPointer< T > &p)
Definition: qpointer.h:122
QAtomicPointer
The QAtomicPointer class is a template class that provides platform-independent atomic operations on ...
Definition: qsimplecodec_p.h:62
Q_CORE_EXPORT
#define Q_CORE_EXPORT
Definition: qglobal.h:1449
qAtomicAssign
void qAtomicAssign(T *&d, T *x)
This is a helper for the assignment operators of implicitly shared classes.
Definition: qatomic.h:195
QAtomicPointer::fetchAndAddOrdered
T * fetchAndAddOrdered(qptrdiff valueToAdd)
Atomic fetch-and-add.
QPointer::operator==
bool operator==(const T *o, const QPointer< T > &p)
Definition: qpointer.h:87
QAtomicPointer::fetchAndAddRelaxed
T * fetchAndAddRelaxed(qptrdiff valueToAdd)
Atomic fetch-and-add.
QAtomicPointer::fetchAndStoreAcquire
T * fetchAndStoreAcquire(T *newValue)
Atomic fetch-and-store.
QAtomicPointer::fetchAndAddRelease
T * fetchAndAddRelease(qptrdiff valueToAdd)
Atomic fetch-and-add.
class
#define class
Definition: qapplication_x11.cpp:92
QAtomicPointer::QAtomicPointer
QAtomicPointer(const QAtomicPointer< T > &other)
Constructs a copy of other.
Definition: qatomic.h:135
QT_END_HEADER
#define QT_END_HEADER
Definition: qglobal.h:137
QAtomicPointer::testAndSetAcquire
bool testAndSetAcquire(T *expectedValue, T *newValue)
Atomic test-and-set.
QAtomicPointer::isFetchAndStoreWaitFree
static bool isFetchAndStoreWaitFree()
Returns true if atomic fetch-and-store is wait-free, false otherwise.
QAtomicPointer::operator=
QAtomicPointer< T > & operator=(T *value)
Assigns the value to this QAtomicPointer and returns a reference to this QAtomicPointer.
Definition: qatomic.h:143
QAtomicInt::QAtomicInt
QAtomicInt(int value=0)
Constructs a QAtomicInt with the given value.
Definition: qatomic.h:58
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