diff options
author | João Abecasis <joao.abecasis@nokia.com> | 2012-03-12 17:14:48 +0100 |
---|---|---|
committer | Qt by Nokia <qt-info@nokia.com> | 2012-03-23 19:43:00 +0100 |
commit | accfdc85e5cb1816b3eda02ec8d37474259c247e (patch) | |
tree | e2c0369b07eaac3982f155adc8890532e6799e0a /tests/auto/corelib/global/qglobal/tst_qglobal.cpp | |
parent | 98c3b8a44220096a4e2a3967a4e9742c3605a5cd (diff) |
Fallback implementation of Q_ALIGNOF
For all practical purposes, the fallback introduced here returns the
desired value. Having a fallback enables unconditional use of Q_ALIGNOF.
For compilers that provide native support for it, Q_ALIGNOF is otherwise
#defined in qcompilerdetection.h.
Change-Id: Ie148ca8936cbbf8b80fe87771a14797c39a9d30c
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'tests/auto/corelib/global/qglobal/tst_qglobal.cpp')
-rw-r--r-- | tests/auto/corelib/global/qglobal/tst_qglobal.cpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/tests/auto/corelib/global/qglobal/tst_qglobal.cpp b/tests/auto/corelib/global/qglobal/tst_qglobal.cpp index b3d76bef8a..529bafaa7a 100644 --- a/tests/auto/corelib/global/qglobal/tst_qglobal.cpp +++ b/tests/auto/corelib/global/qglobal/tst_qglobal.cpp @@ -56,6 +56,7 @@ private slots: void qstaticassert(); void qConstructorFunction(); void isEnum(); + void qAlignOf(); }; void tst_QGlobal::qIsNull() @@ -415,5 +416,115 @@ void tst_QGlobal::isEnum() #undef IS_ENUM_FALSE } +struct Empty {}; +template <class T> struct AlignmentInStruct { T dummy; }; + +typedef int (*fun) (); +typedef int (Empty::*memFun) (); + +#define TEST_AlignOf(type, alignment) \ + do { \ + TEST_AlignOf_impl(type, alignment); \ + \ + TEST_AlignOf_impl(type &, alignment); \ + TEST_AlignOf_RValueRef(type &&, alignment); \ + \ + TEST_AlignOf_impl(type [5], alignment); \ + TEST_AlignOf_impl(type (&) [5], alignment); \ + \ + TEST_AlignOf_impl(AlignmentInStruct<type>, alignment); \ + \ + /* Some internal sanity validation, just for fun */ \ + TEST_AlignOf_impl(AlignmentInStruct<type [5]>, alignment); \ + TEST_AlignOf_impl(AlignmentInStruct<type &>, Q_ALIGNOF(void *)); \ + TEST_AlignOf_impl(AlignmentInStruct<type (&) [5]>, \ + Q_ALIGNOF(void *)); \ + TEST_AlignOf_RValueRef(AlignmentInStruct<type &&>, \ + Q_ALIGNOF(void *)); \ + } while (false) \ + /**/ + +#ifdef Q_COMPILER_RVALUE_REFS +#define TEST_AlignOf_RValueRef(type, alignment) \ + TEST_AlignOf_impl(type, alignment) +#else +#define TEST_AlignOf_RValueRef(type, alignment) do {} while (false) +#endif + +#define TEST_AlignOf_impl(type, alignment) \ + do { \ + QCOMPARE(Q_ALIGNOF(type), size_t(alignment)); \ + /* Compare to native operator for compilers that support it, + otherwise... erm... check consistency! :-) */ \ + QCOMPARE(QT_EMULATED_ALIGNOF(type), Q_ALIGNOF(type)); \ + } while (false) + /**/ + +void tst_QGlobal::qAlignOf() +{ + // Built-in types, except 64-bit integers and double + TEST_AlignOf(char, 1); + TEST_AlignOf(signed char, 1); + TEST_AlignOf(unsigned char, 1); + TEST_AlignOf(qint8, 1); + TEST_AlignOf(quint8, 1); + TEST_AlignOf(qint16, 2); + TEST_AlignOf(quint16, 2); + TEST_AlignOf(qint32, 4); + TEST_AlignOf(quint32, 4); + TEST_AlignOf(void *, sizeof(void *)); + + // Depends on platform and compiler, disabling test for now + // TEST_AlignOf(long double, 16); + + // Empty struct + TEST_AlignOf(Empty, 1); + + // Function pointers + TEST_AlignOf(fun, Q_ALIGNOF(void *)); + TEST_AlignOf(memFun, Q_ALIGNOF(void *)); + + + // 64-bit integers and double + TEST_AlignOf_impl(qint64, 8); + TEST_AlignOf_impl(quint64, 8); + TEST_AlignOf_impl(double, 8); + + TEST_AlignOf_impl(qint64 &, 8); + TEST_AlignOf_impl(quint64 &, 8); + TEST_AlignOf_impl(double &, 8); + + TEST_AlignOf_RValueRef(qint64 &&, 8); + TEST_AlignOf_RValueRef(quint64 &&, 8); + TEST_AlignOf_RValueRef(double &&, 8); + + // 32-bit x86 ABI idiosyncrasies +#if defined(Q_PROCESSOR_X86_32) && !defined(Q_OS_WIN) + TEST_AlignOf_impl(AlignmentInStruct<qint64>, 4); +#else + TEST_AlignOf_impl(AlignmentInStruct<qint64>, 8); +#endif + + TEST_AlignOf_impl(AlignmentInStruct<quint64>, Q_ALIGNOF(AlignmentInStruct<qint64>)); + TEST_AlignOf_impl(AlignmentInStruct<double>, Q_ALIGNOF(AlignmentInStruct<qint64>)); + + // 32-bit x86 ABI, Clang disagrees with gcc +#if !defined(Q_PROCESSOR_X86_32) || !defined(Q_CC_CLANG) + TEST_AlignOf_impl(qint64 [5], Q_ALIGNOF(qint64)); +#else + TEST_AlignOf_impl(qint64 [5], Q_ALIGNOF(AlignmentInStruct<qint64>)); +#endif + + TEST_AlignOf_impl(qint64 (&) [5], Q_ALIGNOF(qint64 [5])); + TEST_AlignOf_impl(quint64 [5], Q_ALIGNOF(quint64 [5])); + TEST_AlignOf_impl(quint64 (&) [5], Q_ALIGNOF(quint64 [5])); + TEST_AlignOf_impl(double [5], Q_ALIGNOF(double [5])); + TEST_AlignOf_impl(double (&) [5], Q_ALIGNOF(double [5])); +} + +#undef TEST_AlignOf +#undef TEST_AlignOf_RValueRef +#undef TEST_AlignOf_impl + QTEST_MAIN(tst_QGlobal) #include "tst_qglobal.moc" |