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# qatomic_vxworks.h

Go to the documentation of this file.

    00001 /****************************************************************************
    00002 **
    00003 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
    00004 ** All rights reserved.
    00005 ** Contact: Nokia Corporation (qt-info@nokia.com)
    00006 **
    00007 ** This file is part of the qmake spec of the Qt Toolkit.
    00008 **
    00009 ** $QT_BEGIN_LICENSE:LGPL$
    00010 ** Commercial Usage
    00011 ** Licensees holding valid Qt Commercial licenses may use this file in
    00012 ** accordance with the Qt Commercial License Agreement provided with the
    00013 ** Software or, alternatively, in accordance with the terms contained in
    00014 ** a written agreement between you and Nokia.
    00015 **
    00016 ** GNU Lesser General Public License Usage
    00017 ** Alternatively, this file may be used under the terms of the GNU Lesser
    00018 ** General Public License version 2.1 as published by the Free Software
    00019 ** Foundation and appearing in the file LICENSE.LGPL included in the
    00020 ** packaging of this file.  Please review the following information to
    00021 ** ensure the GNU Lesser General Public License version 2.1 requirements
    00022 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    00023 **
    00024 ** In addition, as a special exception, Nokia gives you certain additional
    00025 ** rights.  These rights are described in the Nokia Qt LGPL Exception
    00026 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this module.
    00027 **
    00028 ** GNU General Public License Usage
    00029 ** Alternatively, this file may be used under the terms of the GNU
    00030 ** General Public License version 3.0 as published by the Free Software
    00031 ** Foundation and appearing in the file LICENSE.GPL included in the
    00032 ** packaging of this file.  Please review the following information to
    00033 ** ensure the GNU General Public License version 3.0 requirements will be
    00034 ** met: http://www.gnu.org/copyleft/gpl.html.
    00035 **
    00036 ** If you have questions regarding the use of this file, please contact
    00037 ** Nokia at qt-info@nokia.com.
    00038 ** $QT_END_LICENSE$
    00039 **
    00040 ****************************************************************************/
    00041
    00042 #ifndef QATOMIC_VXWORKS_H
    00043 #define QATOMIC_VXWORKS_H
    00044
    00045 QT_BEGIN_HEADER
    00046
    00047 #if defined(__ppc)
    00048 #  include <QtCore/qatomic_powerpc.h>
    00049 #else // generic implementation with taskLock()
    00050
    00051 #if 0
    00052 // we don't want to include the system header here for two function prototypes,
    00053 // because it pulls in a _lot_ of stuff that pollutes the global namespace
    00054 #  include <vxWorksCommon.h>
    00055 #  include <taskLib.h>
    00056 #else
    00057 extern "C" int taskLock();
    00058 extern "C" int taskUnlock();
    00059 #endif
    00060
    00061
    00062
    00063 QT_BEGIN_NAMESPACE
    00064
    00065 #define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE
    00066
    00067 inline bool QBasicAtomicInt::isReferenceCountingNative()
    00068 { return false; }
    00069 inline bool QBasicAtomicInt::isReferenceCountingWaitFree()
    00070 { return false; }
    00071
    00072 #define Q_ATOMIC_INT_TEST_AND_SET_IS_NOT_NATIVE
    00073
    00074 inline bool QBasicAtomicInt::isTestAndSetNative()
    00075 { return false; }
    00076 inline bool QBasicAtomicInt::isTestAndSetWaitFree()
    00077 { return false; }
    00078
    00079 #define Q_ATOMIC_INT_FETCH_AND_STORE_IS_NOT_NATIVE
    00080
    00081 inline bool QBasicAtomicInt::isFetchAndStoreNative()
    00082 { return false; }
    00083 inline bool QBasicAtomicInt::isFetchAndStoreWaitFree()
    00084 { return false; }
    00085
    00086 #define Q_ATOMIC_INT_FETCH_AND_ADD_IS_NOT_NATIVE
    00087
    00088 inline bool QBasicAtomicInt::isFetchAndAddNative()
    00089 { return false; }
    00090 inline bool QBasicAtomicInt::isFetchAndAddWaitFree()
    00091 { return false; }
    00092
    00093 #define Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE
    00094
    00095 template <typename T>
    00096 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetNative()
    00097 { return false; }
    00098 template <typename T>
    00099 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetWaitFree()
    00100 { return false; }
    00101
    00102 #define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_NOT_NATIVE
    00103
    00104 template <typename T>
    00105 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreNative()
    00106 { return false; }
    00107 template <typename T>
    00108 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreWaitFree()
    00109 { return false; }
    00110
    00111 #define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NOT_NATIVE
    00112
    00113 template <typename T>
    00114 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddNative()
    00115 { return false; }
    00116 template <typename T>
    00117 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddWaitFree()
    00118 { return false; }
    00119
    00120 // Reference counting
    00121
    00122 inline bool QBasicAtomicInt::ref()
    00123 {
    00124     taskLock();
    00125     bool ret = (++_q_value != 0);
    00126     taskUnlock();
    00127     return ret;
    00128 }
    00129
    00130 inline bool QBasicAtomicInt::deref()
    00131 {
    00132     taskLock();
    00133     bool ret = (--_q_value != 0);
    00134     taskUnlock();
    00135     return ret;
    00136 }
    00137
    00138 // Test-and-set for integers
    00139
    00140 inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
    00141 {
    00142     taskLock();
    00143     if (_q_value == expectedValue) {
    00144         _q_value = newValue;
    00145         taskUnlock();
    00146         return true;
    00147     }
    00148     taskUnlock();
    00149     return false;
    00150 }
    00151
    00152 inline bool QBasicAtomicInt::testAndSetRelaxed(int expectedValue, int newValue)
    00153 {
    00154     return testAndSetOrdered(expectedValue, newValue);
    00155 }
    00156
    00157 inline bool QBasicAtomicInt::testAndSetAcquire(int expectedValue, int newValue)
    00158 {
    00159     return testAndSetOrdered(expectedValue, newValue);
    00160 }
    00161
    00162 inline bool QBasicAtomicInt::testAndSetRelease(int expectedValue, int newValue)
    00163 {
    00164     return testAndSetOrdered(expectedValue, newValue);
    00165 }
    00166
    00167 // Fetch-and-store for integers
    00168
    00169 inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
    00170 {
    00171     taskLock();
    00172     int returnValue = _q_value;
    00173     _q_value = newValue;
    00174     taskUnlock();
    00175     return returnValue;
    00176 }
    00177
    00178 inline int QBasicAtomicInt::fetchAndStoreRelaxed(int newValue)
    00179 {
    00180     return fetchAndStoreOrdered(newValue);
    00181 }
    00182
    00183 inline int QBasicAtomicInt::fetchAndStoreAcquire(int newValue)
    00184 {
    00185     return fetchAndStoreOrdered(newValue);
    00186 }
    00187
    00188 inline int QBasicAtomicInt::fetchAndStoreRelease(int newValue)
    00189 {
    00190     return fetchAndStoreOrdered(newValue);
    00191 }
    00192
    00193 // Fetch-and-add for integers
    00194
    00195 inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
    00196 {
    00197     taskLock();
    00198     int originalValue = _q_value;
    00199     _q_value += valueToAdd;
    00200     taskUnlock();
    00201     return originalValue;
    00202 }
    00203
    00204 inline int QBasicAtomicInt::fetchAndAddRelaxed(int valueToAdd)
    00205 {
    00206     return fetchAndAddOrdered(valueToAdd);
    00207 }
    00208
    00209 inline int QBasicAtomicInt::fetchAndAddAcquire(int valueToAdd)
    00210 {
    00211     return fetchAndAddOrdered(valueToAdd);
    00212 }
    00213
    00214 inline int QBasicAtomicInt::fetchAndAddRelease(int valueToAdd)
    00215 {
    00216     return fetchAndAddOrdered(valueToAdd);
    00217 }
    00218
    00219 // Test and set for pointers
    00220
    00221 template <typename T>
    00222 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
    00223 {
    00224     taskLock();
    00225     if (_q_value == expectedValue) {
    00226         _q_value = newValue;
    00227         taskUnlock();
    00228         return true;
    00229     }
    00230     taskUnlock();
    00231     return false;
    00232 }
    00233
    00234 template <typename T>
    00235 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelaxed(T *expectedValue, T *newValue)
    00236 {
    00237     return testAndSetOrdered(expectedValue, newValue);
    00238 }
    00239
    00240 template <typename T>
    00241 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetAcquire(T *expectedValue, T *newValue)
    00242 {
    00243     return testAndSetOrdered(expectedValue, newValue);
    00244 }
    00245
    00246 template <typename T>
    00247 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelease(T *expectedValue, T *newValue)
    00248 {
    00249     return testAndSetOrdered(expectedValue, newValue);
    00250 }
    00251
    00252 // Fetch and store for pointers
    00253
    00254 template <typename T>
    00255 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
    00256 {
    00257     taskLock();
    00258     T *returnValue = (_q_value);
    00259     _q_value = newValue;
    00260     taskUnlock();
    00261     return returnValue;
    00262 }
    00263
    00264 template <typename T>
    00265 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelaxed(T *newValue)
    00266 {
    00267     return fetchAndStoreOrdered(newValue);
    00268 }
    00269
    00270 template <typename T>
    00271 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreAcquire(T *newValue)
    00272 {
    00273     return fetchAndStoreOrdered(newValue);
    00274 }
    00275
    00276 template <typename T>
    00277 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelease(T *newValue)
    00278 {
    00279     return fetchAndStoreOrdered(newValue);
    00280 }
    00281
    00282 // Fetch and add for pointers
    00283
    00284 template <typename T>
    00285 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
    00286 {
    00287     taskLock();
    00288     T *returnValue = (_q_value);
    00289     _q_value += valueToAdd;
    00290     taskUnlock();
    00291     return returnValue;
    00292 }
    00293
    00294 template <typename T>
    00295 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelaxed(qptrdiff valueToAdd)
    00296 {
    00297     return fetchAndAddOrdered(valueToAdd);
    00298 }
    00299
    00300 template <typename T>
    00301 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddAcquire(qptrdiff valueToAdd)
    00302 {
    00303     return fetchAndAddOrdered(valueToAdd);
    00304 }
    00305
    00306 template <typename T>
    00307 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelease(qptrdiff valueToAdd)
    00308 {
    00309     return fetchAndAddOrdered(valueToAdd);
    00310 }
    00311
    00312 QT_END_NAMESPACE
    00313
    00314 #endif // generic implementation with taskLock()
    00315
    00316 QT_END_HEADER
    00317
    00318 #endif // QATOMIC_VXWORKS_H