diff options
Diffstat (limited to 'src/corelib/global/qrandom.cpp')
-rw-r--r-- | src/corelib/global/qrandom.cpp | 73 |
1 files changed, 37 insertions, 36 deletions
diff --git a/src/corelib/global/qrandom.cpp b/src/corelib/global/qrandom.cpp index fb20f459b5..395bf0b0cb 100644 --- a/src/corelib/global/qrandom.cpp +++ b/src/corelib/global/qrandom.cpp @@ -918,15 +918,16 @@ void QRandomGenerator::fillRange_helper(void *buffer, void *bufferEnd) fill(buffer, bufferEnd); } -#if defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && (_POSIX_THREAD_SAFE_FUNCTIONS - 0 > 0) +#if defined(Q_OS_ANDROID) && (__ANDROID_API__ < 21) +typedef QThreadStorage<QJNIObjectPrivate> AndroidRandomStorage; +Q_GLOBAL_STATIC(AndroidRandomStorage, randomTLS) + +#elif defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && (_POSIX_THREAD_SAFE_FUNCTIONS - 0 > 0) using SeedStorageType = QtPrivate::FunctionPointer<decltype(&srand)>::Arguments::Car; typedef QThreadStorage<SeedStorageType *> SeedStorage; Q_GLOBAL_STATIC(SeedStorage, randTLS) // Thread Local Storage for seed value -#elif defined(Q_OS_ANDROID) -typedef QThreadStorage<QJNIObjectPrivate> AndroidRandomStorage; -Q_GLOBAL_STATIC(AndroidRandomStorage, randomTLS) #endif /*! @@ -946,21 +947,7 @@ Q_GLOBAL_STATIC(AndroidRandomStorage, randomTLS) */ void qsrand(uint seed) { -#if defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && (_POSIX_THREAD_SAFE_FUNCTIONS - 0 > 0) - SeedStorage *seedStorage = randTLS(); - if (seedStorage) { - SeedStorageType *pseed = seedStorage->localData(); - if (!pseed) - seedStorage->setLocalData(pseed = new SeedStorageType); - *pseed = seed; - } else { - //global static seed storage should always exist, - //except after being deleted by QGlobalStaticDeleter. - //But since it still can be called from destructor of another - //global static object, fallback to srand(seed) - srand(seed); - } -#elif defined(Q_OS_ANDROID) +#if defined(Q_OS_ANDROID) && (__ANDROID_API__ < 21) if (randomTLS->hasLocalData()) { randomTLS->localData().callMethod<void>("setSeed", "(J)V", jlong(seed)); return; @@ -975,6 +962,20 @@ void qsrand(uint seed) } randomTLS->setLocalData(random); +#elif defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && (_POSIX_THREAD_SAFE_FUNCTIONS - 0 > 0) + SeedStorage *seedStorage = randTLS(); + if (seedStorage) { + SeedStorageType *pseed = seedStorage->localData(); + if (!pseed) + seedStorage->setLocalData(pseed = new SeedStorageType); + *pseed = seed; + } else { + //global static seed storage should always exist, + //except after being deleted by QGlobalStaticDeleter. + //But since it still can be called from destructor of another + //global static object, fallback to srand(seed) + srand(seed); + } #else // On Windows srand() and rand() already use Thread-Local-Storage // to store the seed between calls @@ -1002,23 +1003,7 @@ void qsrand(uint seed) */ int qrand() { -#if defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && (_POSIX_THREAD_SAFE_FUNCTIONS - 0 > 0) - SeedStorage *seedStorage = randTLS(); - if (seedStorage) { - SeedStorageType *pseed = seedStorage->localData(); - if (!pseed) { - seedStorage->setLocalData(pseed = new SeedStorageType); - *pseed = 1; - } - return rand_r(pseed); - } else { - //global static seed storage should always exist, - //except after being deleted by QGlobalStaticDeleter. - //But since it still can be called from destructor of another - //global static object, fallback to rand() - return rand(); - } -#elif defined(Q_OS_ANDROID) +#if defined(Q_OS_ANDROID) && (__ANDROID_API__ < 21) AndroidRandomStorage *randomStorage = randomTLS(); if (!randomStorage) return rand(); @@ -1038,6 +1023,22 @@ int qrand() randomStorage->setLocalData(random); return random.callMethod<jint>("nextInt", "(I)I", RAND_MAX); +#elif defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && (_POSIX_THREAD_SAFE_FUNCTIONS - 0 > 0) + SeedStorage *seedStorage = randTLS(); + if (seedStorage) { + SeedStorageType *pseed = seedStorage->localData(); + if (!pseed) { + seedStorage->setLocalData(pseed = new SeedStorageType); + *pseed = 1; + } + return rand_r(pseed); + } else { + //global static seed storage should always exist, + //except after being deleted by QGlobalStaticDeleter. + //But since it still can be called from destructor of another + //global static object, fallback to rand() + return rand(); + } #else // On Windows srand() and rand() already use Thread-Local-Storage // to store the seed between calls |