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# qatomic_x86_64.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 QtCore module 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_X86_64_H
    00043 #define QATOMIC_X86_64_H
    00044
    00045 QT_BEGIN_HEADER
    00046
    00047 QT_BEGIN_NAMESPACE
    00048
    00049 #define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
    00050 #define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_WAIT_FREE
    00051
    00052 inline bool QBasicAtomicInt::isReferenceCountingNative()
    00053 { return true; }
    00054 inline bool QBasicAtomicInt::isReferenceCountingWaitFree()
    00055 { return true; }
    00056
    00057 #define Q_ATOMIC_INT_TEST_AND_SET_IS_ALWAYS_NATIVE
    00058 #define Q_ATOMIC_INT_TEST_AND_SET_IS_WAIT_FREE
    00059
    00060 inline bool QBasicAtomicInt::isTestAndSetNative()
    00061 { return true; }
    00062 inline bool QBasicAtomicInt::isTestAndSetWaitFree()
    00063 { return true; }
    00064
    00065 #define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE
    00066 #define Q_ATOMIC_INT_FETCH_AND_STORE_IS_WAIT_FREE
    00067
    00068 inline bool QBasicAtomicInt::isFetchAndStoreNative()
    00069 { return true; }
    00070 inline bool QBasicAtomicInt::isFetchAndStoreWaitFree()
    00071 { return true; }
    00072
    00073 #define Q_ATOMIC_INT_FETCH_AND_ADD_IS_ALWAYS_NATIVE
    00074 #define Q_ATOMIC_INT_FETCH_AND_ADD_IS_WAIT_FREE
    00075
    00076 inline bool QBasicAtomicInt::isFetchAndAddNative()
    00077 { return true; }
    00078 inline bool QBasicAtomicInt::isFetchAndAddWaitFree()
    00079 { return true; }
    00080
    00081 #define Q_ATOMIC_POINTER_TEST_AND_SET_IS_ALWAYS_NATIVE
    00082 #define Q_ATOMIC_POINTER_TEST_AND_SET_IS_WAIT_FREE
    00083
    00084 template <typename T>
    00085 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetNative()
    00086 { return true; }
    00087 template <typename T>
    00088 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetWaitFree()
    00089 { return true; }
    00090
    00091 #define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE
    00092 #define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_WAIT_FREE
    00093
    00094 template <typename T>
    00095 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreNative()
    00096 { return true; }
    00097 template <typename T>
    00098 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreWaitFree()
    00099 { return true; }
    00100
    00101 #define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_ALWAYS_NATIVE
    00102 #define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_WAIT_FREE
    00103
    00104 template <typename T>
    00105 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddNative()
    00106 { return true; }
    00107 template <typename T>
    00108 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddWaitFree()
    00109 { return true; }
    00110
    00111 #if defined(Q_CC_GNU) || defined(Q_CC_INTEL)
    00112
    00113 inline bool QBasicAtomicInt::ref()
    00114 {
    00115     unsigned char ret;
    00116     asm volatile("lock\n"
    00117                  "incl %0\n"
    00118                  "setne %1"
    00119                  : "=m" (_q_value), "=qm" (ret)
    00120                  : "m" (_q_value)
    00121                  : "memory");
    00122     return ret != 0;
    00123 }
    00124
    00125 inline bool QBasicAtomicInt::deref()
    00126 {
    00127     unsigned char ret;
    00128     asm volatile("lock\n"
    00129                  "decl %0\n"
    00130                  "setne %1"
    00131                  : "=m" (_q_value), "=qm" (ret)
    00132                  : "m" (_q_value)
    00133                  : "memory");
    00134     return ret != 0;
    00135 }
    00136
    00137 inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
    00138 {
    00139     unsigned char ret;
    00140     asm volatile("lock\n"
    00141                  "cmpxchgl %3,%2\n"
    00142                  "sete %1\n"
    00143                  : "=a" (newValue), "=qm" (ret), "+m" (_q_value)
    00144                  : "r" (newValue), "0" (expectedValue)
    00145                  : "memory");
    00146     return ret != 0;
    00147 }
    00148
    00149 inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
    00150 {
    00151     asm volatile("xchgl %0,%1"
    00152                  : "=r" (newValue), "+m" (_q_value)
    00153                  : "0" (newValue)
    00154                  : "memory");
    00155     return newValue;
    00156 }
    00157
    00158 inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
    00159 {
    00160     asm volatile("lock\n"
    00161                  "xaddl %0,%1"
    00162                  : "=r" (valueToAdd), "+m" (_q_value)
    00163                  : "0" (valueToAdd)
    00164                  : "memory");
    00165     return valueToAdd;
    00166 }
    00167
    00168 template <typename T>
    00169 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
    00170 {
    00171     unsigned char ret;
    00172     asm volatile("lock\n"
    00173                  "cmpxchgq %3,%2\n"
    00174                  "sete %1\n"
    00175                  : "=a" (newValue), "=qm" (ret), "+m" (_q_value)
    00176                  : "r" (newValue), "0" (expectedValue)
    00177                  : "memory");
    00178     return ret != 0;
    00179 }
    00180
    00181 template <typename T>
    00182 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
    00183 {
    00184     asm volatile("xchgq %0,%1"
    00185                  : "=r" (newValue), "+m" (_q_value)
    00186                  : "0" (newValue)
    00187                  : "memory");
    00188     return newValue;
    00189 }
    00190
    00191 template <typename T>
    00192 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
    00193 {
    00194     asm volatile("lock\n"
    00195                  "xaddq %0,%1"
    00196                  : "=r" (valueToAdd), "+m" (_q_value)
    00197                  : "0" (valueToAdd * sizeof(T))
    00198                  : "memory");
    00199     return reinterpret_cast<T *>(valueToAdd);
    00200 }
    00201
    00202 #else // !Q_CC_INTEL && !Q_CC_GNU
    00203
    00204 extern "C" {
    00205     Q_CORE_EXPORT int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval);
    00206     Q_CORE_EXPORT int q_atomic_test_and_set_ptr(volatile void *ptr, void *expected, void *newval);
    00207     Q_CORE_EXPORT int q_atomic_increment(volatile int *ptr);
    00208     Q_CORE_EXPORT int q_atomic_decrement(volatile int *ptr);
    00209     Q_CORE_EXPORT int q_atomic_set_int(volatile int *ptr, int newval);
    00210     Q_CORE_EXPORT void *q_atomic_set_ptr(volatile void *ptr, void *newval);
    00211     Q_CORE_EXPORT int q_atomic_fetch_and_add_int(volatile int *ptr, int value);
    00212     Q_CORE_EXPORT void *q_atomic_fetch_and_add_ptr(volatile void *ptr, qptrdiff value);
    00213 } // extern "C"
    00214
    00215 inline bool QBasicAtomicInt::ref()
    00216 {
    00217     return q_atomic_increment(&_q_value) != 0;
    00218 }
    00219
    00220 inline bool QBasicAtomicInt::deref()
    00221 {
    00222     return q_atomic_decrement(&_q_value) != 0;
    00223 }
    00224
    00225 inline bool QBasicAtomicInt::testAndSetOrdered(int expected, int newval)
    00226 {
    00227     return q_atomic_test_and_set_int(&_q_value, expected, newval) != 0;
    00228 }
    00229
    00230 inline int QBasicAtomicInt::fetchAndStoreOrdered(int newval)
    00231 {
    00232     return q_atomic_set_int(&_q_value, newval);
    00233 }
    00234
    00235 inline int QBasicAtomicInt::fetchAndAddOrdered(int aValue)
    00236 {
    00237     return q_atomic_fetch_and_add_int(&_q_value, aValue);
    00238 }
    00239
    00240 template <typename T>
    00241 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
    00242 {
    00243     return q_atomic_test_and_set_ptr(&_q_value, expectedValue, newValue);
    00244 }
    00245
    00246 template <typename T>
    00247 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
    00248 {
    00249     return reinterpret_cast<T *>(q_atomic_set_ptr(&_q_value, newValue));
    00250 }
    00251
    00252 template <typename T>
    00253 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
    00254 {
    00255     return reinterpret_cast<T *>(q_atomic_fetch_and_add_ptr(&_q_value, valueToAdd * sizeof(T)));
    00256 }
    00257
    00258 #endif // Q_CC_GNU || Q_CC_INTEL
    00259
    00260 inline bool QBasicAtomicInt::testAndSetRelaxed(int expectedValue, int newValue)
    00261 {
    00262     return testAndSetOrdered(expectedValue, newValue);
    00263 }
    00264
    00265 inline bool QBasicAtomicInt::testAndSetAcquire(int expectedValue, int newValue)
    00266 {
    00267     return testAndSetOrdered(expectedValue, newValue);
    00268 }
    00269
    00270 inline bool QBasicAtomicInt::testAndSetRelease(int expectedValue, int newValue)
    00271 {
    00272     return testAndSetOrdered(expectedValue, newValue);
    00273 }
    00274
    00275 inline int QBasicAtomicInt::fetchAndStoreRelaxed(int newValue)
    00276 {
    00277     return fetchAndStoreOrdered(newValue);
    00278 }
    00279
    00280 inline int QBasicAtomicInt::fetchAndStoreAcquire(int newValue)
    00281 {
    00282     return fetchAndStoreOrdered(newValue);
    00283 }
    00284
    00285 inline int QBasicAtomicInt::fetchAndStoreRelease(int newValue)
    00286 {
    00287     return fetchAndStoreOrdered(newValue);
    00288 }
    00289
    00290 inline int QBasicAtomicInt::fetchAndAddRelaxed(int valueToAdd)
    00291 {
    00292     return fetchAndAddOrdered(valueToAdd);
    00293 }
    00294
    00295 inline int QBasicAtomicInt::fetchAndAddAcquire(int valueToAdd)
    00296 {
    00297     return fetchAndAddOrdered(valueToAdd);
    00298 }
    00299
    00300 inline int QBasicAtomicInt::fetchAndAddRelease(int valueToAdd)
    00301 {
    00302     return fetchAndAddOrdered(valueToAdd);
    00303 }
    00304
    00305 template <typename T>
    00306 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelaxed(T *expectedValue, T *newValue)
    00307 {
    00308     return testAndSetOrdered(expectedValue, newValue);
    00309 }
    00310
    00311 template <typename T>
    00312 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetAcquire(T *expectedValue, T *newValue)
    00313 {
    00314     return testAndSetOrdered(expectedValue, newValue);
    00315 }
    00316
    00317 template <typename T>
    00318 Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelease(T *expectedValue, T *newValue)
    00319 {
    00320     return testAndSetOrdered(expectedValue, newValue);
    00321 }
    00322
    00323 template <typename T>
    00324 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelaxed(T *newValue)
    00325 {
    00326     return fetchAndStoreOrdered(newValue);
    00327 }
    00328
    00329 template <typename T>
    00330 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreAcquire(T *newValue)
    00331 {
    00332     return fetchAndStoreOrdered(newValue);
    00333 }
    00334
    00335 template <typename T>
    00336 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelease(T *newValue)
    00337 {
    00338     return fetchAndStoreOrdered(newValue);
    00339 }
    00340
    00341 template <typename T>
    00342 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelaxed(qptrdiff valueToAdd)
    00343 {
    00344     return fetchAndAddOrdered(valueToAdd);
    00345 }
    00346
    00347 template <typename T>
    00348 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddAcquire(qptrdiff valueToAdd)
    00349 {
    00350     return fetchAndAddOrdered(valueToAdd);
    00351 }
    00352
    00353 template <typename T>
    00354 Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelease(qptrdiff valueToAdd)
    00355 {
    00356     return fetchAndAddOrdered(valueToAdd);
    00357 }
    00358
    00359 QT_END_NAMESPACE
    00360
    00361 QT_END_HEADER
    00362
    00363 #endif // QATOMIC_X86_64_H