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    41 

    42 #ifndef QBASICATOMIC_H

    43 #define QBASICATOMIC_H

    44 

    45 #include <QtCore/qglobal.h>

    46 

    47 QT_BEGIN_HEADER

    48 

    49 QT_BEGIN_NAMESPACE

    50 

    51 QT_MODULE(Core)

    52 

    53 class Q_CORE_EXPORT QBasicAtomicInt

    54 {

    55 public:

    56 #ifdef QT_ARCH_PARISC

    57     int _q_lock[4];

    58 #endif

    59 #if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE)

    60     union { // needed for Q_BASIC_ATOMIC_INITIALIZER

    61         volatile long _q_value;

    62     };

    63 #else

    64     volatile int _q_value;

    65 #endif

    66 

    67     // Non-atomic API

    68     inline bool operator==(int value) const

    69     {

    70         return _q_value == value;

    71     }

    72 

    73     inline bool operator!=(int value) const

    74     {

    75         return _q_value != value;

    76     }

    77 

    78     inline bool operator!() const

    79     {

    80         return _q_value == 0;

    81     }

    82 

    83     inline operator int() const

    84     {

    85         return _q_value;

    86     }

    87 

    88     inline QBasicAtomicInt &operator=(int value)

    89     {

    90 #ifdef QT_ARCH_PARISC

    91         this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;

    92 #endif

    93         _q_value = value;

    94         return *this;

    95     }

    96 

    97     // Atomic API, implemented in qatomic_XXX.h

    98 

    99     static bool isReferenceCountingNative();

   100     static bool isReferenceCountingWaitFree();

   101 

   102     bool ref();

   103     bool deref();

   104 

   105     static bool isTestAndSetNative();

   106     static bool isTestAndSetWaitFree();

   107 

   108     bool testAndSetRelaxed(int expectedValue, int newValue);

   109     bool testAndSetAcquire(int expectedValue, int newValue);

   110     bool testAndSetRelease(int expectedValue, int newValue);

   111     bool testAndSetOrdered(int expectedValue, int newValue);

   112 

   113     static bool isFetchAndStoreNative();

   114     static bool isFetchAndStoreWaitFree();

   115 

   116     int fetchAndStoreRelaxed(int newValue);

   117     int fetchAndStoreAcquire(int newValue);

   118     int fetchAndStoreRelease(int newValue);

   119     int fetchAndStoreOrdered(int newValue);

   120 

   121     static bool isFetchAndAddNative();

   122     static bool isFetchAndAddWaitFree();

   123 

   124     int fetchAndAddRelaxed(int valueToAdd);

   125     int fetchAndAddAcquire(int valueToAdd);

   126     int fetchAndAddRelease(int valueToAdd);

   127     int fetchAndAddOrdered(int valueToAdd);

   128 };

   129 

   130 template <typename T>

   131 class QBasicAtomicPointer

   132 {

   133 public:

   134 #ifdef QT_ARCH_PARISC

   135     int _q_lock[4];

   136 #endif

   137 #if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE)

   138     union {

   139         T * volatile _q_value;

   140         long volatile _q_value_integral;

   141     };

   142 #else

   143     T * volatile _q_value;

   144 #endif

   145 

   146     // Non-atomic API

   147     inline bool operator==(T *value) const

   148     {

   149         return _q_value == value;

   150     }

   151 

   152     inline bool operator!=(T *value) const

   153     {

   154         return !operator==(value);

   155     }

   156 

   157     inline bool operator!() const

   158     {

   159         return operator==(0);

   160     }

   161 

   162     inline operator T *() const

   163     {

   164         return _q_value;

   165     }

   166 

   167     inline T *operator->() const

   168     {

   169         return _q_value;

   170     }

   171 

   172     inline QBasicAtomicPointer<T> &operator=(T *value)

   173     {

   174 #ifdef QT_ARCH_PARISC

   175         this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;

   176 #endif

   177         _q_value = value;

   178         return *this;

   179     }

   180 

   181     // Atomic API, implemented in qatomic_XXX.h

   182 

   183     static bool isTestAndSetNative();

   184     static bool isTestAndSetWaitFree();

   185 

   186     bool testAndSetRelaxed(T *expectedValue, T *newValue);

   187     bool testAndSetAcquire(T *expectedValue, T *newValue);

   188     bool testAndSetRelease(T *expectedValue, T *newValue);

   189     bool testAndSetOrdered(T *expectedValue, T *newValue);

   190 

   191     static bool isFetchAndStoreNative();

   192     static bool isFetchAndStoreWaitFree();

   193 

   194     T *fetchAndStoreRelaxed(T *newValue);

   195     T *fetchAndStoreAcquire(T *newValue);

   196     T *fetchAndStoreRelease(T *newValue);

   197     T *fetchAndStoreOrdered(T *newValue);

   198 

   199     static bool isFetchAndAddNative();

   200     static bool isFetchAndAddWaitFree();

   201 

   202     T *fetchAndAddRelaxed(qptrdiff valueToAdd);

   203     T *fetchAndAddAcquire(qptrdiff valueToAdd);

   204     T *fetchAndAddRelease(qptrdiff valueToAdd);

   205     T *fetchAndAddOrdered(qptrdiff valueToAdd);

   206 };

   207 

   208 #ifdef QT_ARCH_PARISC

   209 #  define Q_BASIC_ATOMIC_INITIALIZER(a) {{-1,-1,-1,-1},(a)}

   210 #elif defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE)

   211 #  define Q_BASIC_ATOMIC_INITIALIZER(a) { {(a)} }

   212 #else

   213 #  define Q_BASIC_ATOMIC_INITIALIZER(a) { (a) }

   214 #endif

   215 

   216 QT_END_NAMESPACE

   217 QT_END_HEADER

   218 

   219 #if defined(QT_MOC) || defined(QT_BUILD_QMAKE) || defined(QT_RCC) || defined(QT_UIC) || defined(QT_BOOTSTRAPPED)

   220 #  include <QtCore/qatomic_bootstrap.h>

   221 #else

   222 #  include <QtCore/qatomic_arch.h>

   223 #endif

   224 

   225 #endif // QBASIC_ATOMIC